1c6fd2807SJeff Garzik /* 2c6fd2807SJeff Garzik * libata-core.c - helper library for ATA 3c6fd2807SJeff Garzik * 4c6fd2807SJeff Garzik * Maintained by: Jeff Garzik <jgarzik@pobox.com> 5c6fd2807SJeff Garzik * Please ALWAYS copy linux-ide@vger.kernel.org 6c6fd2807SJeff Garzik * on emails. 7c6fd2807SJeff Garzik * 8c6fd2807SJeff Garzik * Copyright 2003-2004 Red Hat, Inc. All rights reserved. 9c6fd2807SJeff Garzik * Copyright 2003-2004 Jeff Garzik 10c6fd2807SJeff Garzik * 11c6fd2807SJeff Garzik * 12c6fd2807SJeff Garzik * This program is free software; you can redistribute it and/or modify 13c6fd2807SJeff Garzik * it under the terms of the GNU General Public License as published by 14c6fd2807SJeff Garzik * the Free Software Foundation; either version 2, or (at your option) 15c6fd2807SJeff Garzik * any later version. 16c6fd2807SJeff Garzik * 17c6fd2807SJeff Garzik * This program is distributed in the hope that it will be useful, 18c6fd2807SJeff Garzik * but WITHOUT ANY WARRANTY; without even the implied warranty of 19c6fd2807SJeff Garzik * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 20c6fd2807SJeff Garzik * GNU General Public License for more details. 21c6fd2807SJeff Garzik * 22c6fd2807SJeff Garzik * You should have received a copy of the GNU General Public License 23c6fd2807SJeff Garzik * along with this program; see the file COPYING. If not, write to 24c6fd2807SJeff Garzik * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. 25c6fd2807SJeff Garzik * 26c6fd2807SJeff Garzik * 27c6fd2807SJeff Garzik * libata documentation is available via 'make {ps|pdf}docs', 28c6fd2807SJeff Garzik * as Documentation/DocBook/libata.* 29c6fd2807SJeff Garzik * 30c6fd2807SJeff Garzik * Hardware documentation available from http://www.t13.org/ and 31c6fd2807SJeff Garzik * http://www.sata-io.org/ 32c6fd2807SJeff Garzik * 33c6fd2807SJeff Garzik */ 34c6fd2807SJeff Garzik 35c6fd2807SJeff Garzik #include <linux/kernel.h> 36c6fd2807SJeff Garzik #include <linux/module.h> 37c6fd2807SJeff Garzik #include <linux/pci.h> 38c6fd2807SJeff Garzik #include <linux/init.h> 39c6fd2807SJeff Garzik #include <linux/list.h> 40c6fd2807SJeff Garzik #include <linux/mm.h> 41c6fd2807SJeff Garzik #include <linux/highmem.h> 42c6fd2807SJeff Garzik #include <linux/spinlock.h> 43c6fd2807SJeff Garzik #include <linux/blkdev.h> 44c6fd2807SJeff Garzik #include <linux/delay.h> 45c6fd2807SJeff Garzik #include <linux/timer.h> 46c6fd2807SJeff Garzik #include <linux/interrupt.h> 47c6fd2807SJeff Garzik #include <linux/completion.h> 48c6fd2807SJeff Garzik #include <linux/suspend.h> 49c6fd2807SJeff Garzik #include <linux/workqueue.h> 50c6fd2807SJeff Garzik #include <linux/jiffies.h> 51c6fd2807SJeff Garzik #include <linux/scatterlist.h> 52c6fd2807SJeff Garzik #include <scsi/scsi.h> 53c6fd2807SJeff Garzik #include <scsi/scsi_cmnd.h> 54c6fd2807SJeff Garzik #include <scsi/scsi_host.h> 55c6fd2807SJeff Garzik #include <linux/libata.h> 56c6fd2807SJeff Garzik #include <asm/io.h> 57c6fd2807SJeff Garzik #include <asm/semaphore.h> 58c6fd2807SJeff Garzik #include <asm/byteorder.h> 59c6fd2807SJeff Garzik 60c6fd2807SJeff Garzik #include "libata.h" 61c6fd2807SJeff Garzik 62fda0efc5SJeff Garzik 63c6fd2807SJeff Garzik /* debounce timing parameters in msecs { interval, duration, timeout } */ 64c6fd2807SJeff Garzik const unsigned long sata_deb_timing_normal[] = { 5, 100, 2000 }; 65c6fd2807SJeff Garzik const unsigned long sata_deb_timing_hotplug[] = { 25, 500, 2000 }; 66c6fd2807SJeff Garzik const unsigned long sata_deb_timing_long[] = { 100, 2000, 5000 }; 67c6fd2807SJeff Garzik 68c6fd2807SJeff Garzik static unsigned int ata_dev_init_params(struct ata_device *dev, 69c6fd2807SJeff Garzik u16 heads, u16 sectors); 70c6fd2807SJeff Garzik static unsigned int ata_dev_set_xfermode(struct ata_device *dev); 719f45cbd3SKristen Carlson Accardi static unsigned int ata_dev_set_AN(struct ata_device *dev, u8 enable); 72c6fd2807SJeff Garzik static void ata_dev_xfermask(struct ata_device *dev); 7375683fe7STejun Heo static unsigned long ata_dev_blacklisted(const struct ata_device *dev); 74c6fd2807SJeff Garzik 75f3187195STejun Heo unsigned int ata_print_id = 1; 76c6fd2807SJeff Garzik static struct workqueue_struct *ata_wq; 77c6fd2807SJeff Garzik 78c6fd2807SJeff Garzik struct workqueue_struct *ata_aux_wq; 79c6fd2807SJeff Garzik 80c6fd2807SJeff Garzik int atapi_enabled = 1; 81c6fd2807SJeff Garzik module_param(atapi_enabled, int, 0444); 82c6fd2807SJeff Garzik MODULE_PARM_DESC(atapi_enabled, "Enable discovery of ATAPI devices (0=off, 1=on)"); 83c6fd2807SJeff Garzik 84c6fd2807SJeff Garzik int atapi_dmadir = 0; 85c6fd2807SJeff Garzik module_param(atapi_dmadir, int, 0444); 86c6fd2807SJeff Garzik MODULE_PARM_DESC(atapi_dmadir, "Enable ATAPI DMADIR bridge support (0=off, 1=on)"); 87c6fd2807SJeff Garzik 88baf4fdfaSMark Lord int atapi_passthru16 = 1; 89baf4fdfaSMark Lord module_param(atapi_passthru16, int, 0444); 90baf4fdfaSMark Lord MODULE_PARM_DESC(atapi_passthru16, "Enable ATA_16 passthru for ATAPI devices; on by default (0=off, 1=on)"); 91baf4fdfaSMark Lord 92c6fd2807SJeff Garzik int libata_fua = 0; 93c6fd2807SJeff Garzik module_param_named(fua, libata_fua, int, 0444); 94c6fd2807SJeff Garzik MODULE_PARM_DESC(fua, "FUA support (0=off, 1=on)"); 95c6fd2807SJeff Garzik 961e999736SAlan Cox static int ata_ignore_hpa = 0; 971e999736SAlan Cox module_param_named(ignore_hpa, ata_ignore_hpa, int, 0644); 981e999736SAlan Cox MODULE_PARM_DESC(ignore_hpa, "Ignore HPA limit (0=keep BIOS limits, 1=ignore limits, using full disk)"); 991e999736SAlan Cox 100b3a70601SAlan Cox static int libata_dma_mask = ATA_DMA_MASK_ATA|ATA_DMA_MASK_ATAPI|ATA_DMA_MASK_CFA; 101b3a70601SAlan Cox module_param_named(dma, libata_dma_mask, int, 0444); 102b3a70601SAlan Cox MODULE_PARM_DESC(dma, "DMA enable/disable (0x1==ATA, 0x2==ATAPI, 0x4==CF)"); 103b3a70601SAlan Cox 104c6fd2807SJeff Garzik static int ata_probe_timeout = ATA_TMOUT_INTERNAL / HZ; 105c6fd2807SJeff Garzik module_param(ata_probe_timeout, int, 0444); 106c6fd2807SJeff Garzik MODULE_PARM_DESC(ata_probe_timeout, "Set ATA probing timeout (seconds)"); 107c6fd2807SJeff Garzik 108d7d0dad6SJeff Garzik int libata_noacpi = 1; 109d7d0dad6SJeff Garzik module_param_named(noacpi, libata_noacpi, int, 0444); 11011ef697bSKristen Carlson Accardi MODULE_PARM_DESC(noacpi, "Disables the use of ACPI in suspend/resume when set"); 11111ef697bSKristen Carlson Accardi 112c6fd2807SJeff Garzik MODULE_AUTHOR("Jeff Garzik"); 113c6fd2807SJeff Garzik MODULE_DESCRIPTION("Library module for ATA devices"); 114c6fd2807SJeff Garzik MODULE_LICENSE("GPL"); 115c6fd2807SJeff Garzik MODULE_VERSION(DRV_VERSION); 116c6fd2807SJeff Garzik 117c6fd2807SJeff Garzik 118c6fd2807SJeff Garzik /** 119c6fd2807SJeff Garzik * ata_tf_to_fis - Convert ATA taskfile to SATA FIS structure 120c6fd2807SJeff Garzik * @tf: Taskfile to convert 121c6fd2807SJeff Garzik * @pmp: Port multiplier port 1229977126cSTejun Heo * @is_cmd: This FIS is for command 1239977126cSTejun Heo * @fis: Buffer into which data will output 124c6fd2807SJeff Garzik * 125c6fd2807SJeff Garzik * Converts a standard ATA taskfile to a Serial ATA 126c6fd2807SJeff Garzik * FIS structure (Register - Host to Device). 127c6fd2807SJeff Garzik * 128c6fd2807SJeff Garzik * LOCKING: 129c6fd2807SJeff Garzik * Inherited from caller. 130c6fd2807SJeff Garzik */ 1319977126cSTejun Heo void ata_tf_to_fis(const struct ata_taskfile *tf, u8 pmp, int is_cmd, u8 *fis) 132c6fd2807SJeff Garzik { 133c6fd2807SJeff Garzik fis[0] = 0x27; /* Register - Host to Device FIS */ 1349977126cSTejun Heo fis[1] = pmp & 0xf; /* Port multiplier number*/ 1359977126cSTejun Heo if (is_cmd) 1369977126cSTejun Heo fis[1] |= (1 << 7); /* bit 7 indicates Command FIS */ 1379977126cSTejun Heo 138c6fd2807SJeff Garzik fis[2] = tf->command; 139c6fd2807SJeff Garzik fis[3] = tf->feature; 140c6fd2807SJeff Garzik 141c6fd2807SJeff Garzik fis[4] = tf->lbal; 142c6fd2807SJeff Garzik fis[5] = tf->lbam; 143c6fd2807SJeff Garzik fis[6] = tf->lbah; 144c6fd2807SJeff Garzik fis[7] = tf->device; 145c6fd2807SJeff Garzik 146c6fd2807SJeff Garzik fis[8] = tf->hob_lbal; 147c6fd2807SJeff Garzik fis[9] = tf->hob_lbam; 148c6fd2807SJeff Garzik fis[10] = tf->hob_lbah; 149c6fd2807SJeff Garzik fis[11] = tf->hob_feature; 150c6fd2807SJeff Garzik 151c6fd2807SJeff Garzik fis[12] = tf->nsect; 152c6fd2807SJeff Garzik fis[13] = tf->hob_nsect; 153c6fd2807SJeff Garzik fis[14] = 0; 154c6fd2807SJeff Garzik fis[15] = tf->ctl; 155c6fd2807SJeff Garzik 156c6fd2807SJeff Garzik fis[16] = 0; 157c6fd2807SJeff Garzik fis[17] = 0; 158c6fd2807SJeff Garzik fis[18] = 0; 159c6fd2807SJeff Garzik fis[19] = 0; 160c6fd2807SJeff Garzik } 161c6fd2807SJeff Garzik 162c6fd2807SJeff Garzik /** 163c6fd2807SJeff Garzik * ata_tf_from_fis - Convert SATA FIS to ATA taskfile 164c6fd2807SJeff Garzik * @fis: Buffer from which data will be input 165c6fd2807SJeff Garzik * @tf: Taskfile to output 166c6fd2807SJeff Garzik * 167c6fd2807SJeff Garzik * Converts a serial ATA FIS structure to a standard ATA taskfile. 168c6fd2807SJeff Garzik * 169c6fd2807SJeff Garzik * LOCKING: 170c6fd2807SJeff Garzik * Inherited from caller. 171c6fd2807SJeff Garzik */ 172c6fd2807SJeff Garzik 173c6fd2807SJeff Garzik void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf) 174c6fd2807SJeff Garzik { 175c6fd2807SJeff Garzik tf->command = fis[2]; /* status */ 176c6fd2807SJeff Garzik tf->feature = fis[3]; /* error */ 177c6fd2807SJeff Garzik 178c6fd2807SJeff Garzik tf->lbal = fis[4]; 179c6fd2807SJeff Garzik tf->lbam = fis[5]; 180c6fd2807SJeff Garzik tf->lbah = fis[6]; 181c6fd2807SJeff Garzik tf->device = fis[7]; 182c6fd2807SJeff Garzik 183c6fd2807SJeff Garzik tf->hob_lbal = fis[8]; 184c6fd2807SJeff Garzik tf->hob_lbam = fis[9]; 185c6fd2807SJeff Garzik tf->hob_lbah = fis[10]; 186c6fd2807SJeff Garzik 187c6fd2807SJeff Garzik tf->nsect = fis[12]; 188c6fd2807SJeff Garzik tf->hob_nsect = fis[13]; 189c6fd2807SJeff Garzik } 190c6fd2807SJeff Garzik 191c6fd2807SJeff Garzik static const u8 ata_rw_cmds[] = { 192c6fd2807SJeff Garzik /* pio multi */ 193c6fd2807SJeff Garzik ATA_CMD_READ_MULTI, 194c6fd2807SJeff Garzik ATA_CMD_WRITE_MULTI, 195c6fd2807SJeff Garzik ATA_CMD_READ_MULTI_EXT, 196c6fd2807SJeff Garzik ATA_CMD_WRITE_MULTI_EXT, 197c6fd2807SJeff Garzik 0, 198c6fd2807SJeff Garzik 0, 199c6fd2807SJeff Garzik 0, 200c6fd2807SJeff Garzik ATA_CMD_WRITE_MULTI_FUA_EXT, 201c6fd2807SJeff Garzik /* pio */ 202c6fd2807SJeff Garzik ATA_CMD_PIO_READ, 203c6fd2807SJeff Garzik ATA_CMD_PIO_WRITE, 204c6fd2807SJeff Garzik ATA_CMD_PIO_READ_EXT, 205c6fd2807SJeff Garzik ATA_CMD_PIO_WRITE_EXT, 206c6fd2807SJeff Garzik 0, 207c6fd2807SJeff Garzik 0, 208c6fd2807SJeff Garzik 0, 209c6fd2807SJeff Garzik 0, 210c6fd2807SJeff Garzik /* dma */ 211c6fd2807SJeff Garzik ATA_CMD_READ, 212c6fd2807SJeff Garzik ATA_CMD_WRITE, 213c6fd2807SJeff Garzik ATA_CMD_READ_EXT, 214c6fd2807SJeff Garzik ATA_CMD_WRITE_EXT, 215c6fd2807SJeff Garzik 0, 216c6fd2807SJeff Garzik 0, 217c6fd2807SJeff Garzik 0, 218c6fd2807SJeff Garzik ATA_CMD_WRITE_FUA_EXT 219c6fd2807SJeff Garzik }; 220c6fd2807SJeff Garzik 221c6fd2807SJeff Garzik /** 222c6fd2807SJeff Garzik * ata_rwcmd_protocol - set taskfile r/w commands and protocol 223bd056d7eSTejun Heo * @tf: command to examine and configure 224bd056d7eSTejun Heo * @dev: device tf belongs to 225c6fd2807SJeff Garzik * 226c6fd2807SJeff Garzik * Examine the device configuration and tf->flags to calculate 227c6fd2807SJeff Garzik * the proper read/write commands and protocol to use. 228c6fd2807SJeff Garzik * 229c6fd2807SJeff Garzik * LOCKING: 230c6fd2807SJeff Garzik * caller. 231c6fd2807SJeff Garzik */ 232bd056d7eSTejun Heo static int ata_rwcmd_protocol(struct ata_taskfile *tf, struct ata_device *dev) 233c6fd2807SJeff Garzik { 234c6fd2807SJeff Garzik u8 cmd; 235c6fd2807SJeff Garzik 236c6fd2807SJeff Garzik int index, fua, lba48, write; 237c6fd2807SJeff Garzik 238c6fd2807SJeff Garzik fua = (tf->flags & ATA_TFLAG_FUA) ? 4 : 0; 239c6fd2807SJeff Garzik lba48 = (tf->flags & ATA_TFLAG_LBA48) ? 2 : 0; 240c6fd2807SJeff Garzik write = (tf->flags & ATA_TFLAG_WRITE) ? 1 : 0; 241c6fd2807SJeff Garzik 242c6fd2807SJeff Garzik if (dev->flags & ATA_DFLAG_PIO) { 243c6fd2807SJeff Garzik tf->protocol = ATA_PROT_PIO; 244c6fd2807SJeff Garzik index = dev->multi_count ? 0 : 8; 2459af5c9c9STejun Heo } else if (lba48 && (dev->link->ap->flags & ATA_FLAG_PIO_LBA48)) { 246c6fd2807SJeff Garzik /* Unable to use DMA due to host limitation */ 247c6fd2807SJeff Garzik tf->protocol = ATA_PROT_PIO; 248c6fd2807SJeff Garzik index = dev->multi_count ? 0 : 8; 249c6fd2807SJeff Garzik } else { 250c6fd2807SJeff Garzik tf->protocol = ATA_PROT_DMA; 251c6fd2807SJeff Garzik index = 16; 252c6fd2807SJeff Garzik } 253c6fd2807SJeff Garzik 254c6fd2807SJeff Garzik cmd = ata_rw_cmds[index + fua + lba48 + write]; 255c6fd2807SJeff Garzik if (cmd) { 256c6fd2807SJeff Garzik tf->command = cmd; 257c6fd2807SJeff Garzik return 0; 258c6fd2807SJeff Garzik } 259c6fd2807SJeff Garzik return -1; 260c6fd2807SJeff Garzik } 261c6fd2807SJeff Garzik 262c6fd2807SJeff Garzik /** 26335b649feSTejun Heo * ata_tf_read_block - Read block address from ATA taskfile 26435b649feSTejun Heo * @tf: ATA taskfile of interest 26535b649feSTejun Heo * @dev: ATA device @tf belongs to 26635b649feSTejun Heo * 26735b649feSTejun Heo * LOCKING: 26835b649feSTejun Heo * None. 26935b649feSTejun Heo * 27035b649feSTejun Heo * Read block address from @tf. This function can handle all 27135b649feSTejun Heo * three address formats - LBA, LBA48 and CHS. tf->protocol and 27235b649feSTejun Heo * flags select the address format to use. 27335b649feSTejun Heo * 27435b649feSTejun Heo * RETURNS: 27535b649feSTejun Heo * Block address read from @tf. 27635b649feSTejun Heo */ 27735b649feSTejun Heo u64 ata_tf_read_block(struct ata_taskfile *tf, struct ata_device *dev) 27835b649feSTejun Heo { 27935b649feSTejun Heo u64 block = 0; 28035b649feSTejun Heo 28135b649feSTejun Heo if (tf->flags & ATA_TFLAG_LBA) { 28235b649feSTejun Heo if (tf->flags & ATA_TFLAG_LBA48) { 28335b649feSTejun Heo block |= (u64)tf->hob_lbah << 40; 28435b649feSTejun Heo block |= (u64)tf->hob_lbam << 32; 28535b649feSTejun Heo block |= tf->hob_lbal << 24; 28635b649feSTejun Heo } else 28735b649feSTejun Heo block |= (tf->device & 0xf) << 24; 28835b649feSTejun Heo 28935b649feSTejun Heo block |= tf->lbah << 16; 29035b649feSTejun Heo block |= tf->lbam << 8; 29135b649feSTejun Heo block |= tf->lbal; 29235b649feSTejun Heo } else { 29335b649feSTejun Heo u32 cyl, head, sect; 29435b649feSTejun Heo 29535b649feSTejun Heo cyl = tf->lbam | (tf->lbah << 8); 29635b649feSTejun Heo head = tf->device & 0xf; 29735b649feSTejun Heo sect = tf->lbal; 29835b649feSTejun Heo 29935b649feSTejun Heo block = (cyl * dev->heads + head) * dev->sectors + sect; 30035b649feSTejun Heo } 30135b649feSTejun Heo 30235b649feSTejun Heo return block; 30335b649feSTejun Heo } 30435b649feSTejun Heo 30535b649feSTejun Heo /** 306bd056d7eSTejun Heo * ata_build_rw_tf - Build ATA taskfile for given read/write request 307bd056d7eSTejun Heo * @tf: Target ATA taskfile 308bd056d7eSTejun Heo * @dev: ATA device @tf belongs to 309bd056d7eSTejun Heo * @block: Block address 310bd056d7eSTejun Heo * @n_block: Number of blocks 311bd056d7eSTejun Heo * @tf_flags: RW/FUA etc... 312bd056d7eSTejun Heo * @tag: tag 313bd056d7eSTejun Heo * 314bd056d7eSTejun Heo * LOCKING: 315bd056d7eSTejun Heo * None. 316bd056d7eSTejun Heo * 317bd056d7eSTejun Heo * Build ATA taskfile @tf for read/write request described by 318bd056d7eSTejun Heo * @block, @n_block, @tf_flags and @tag on @dev. 319bd056d7eSTejun Heo * 320bd056d7eSTejun Heo * RETURNS: 321bd056d7eSTejun Heo * 322bd056d7eSTejun Heo * 0 on success, -ERANGE if the request is too large for @dev, 323bd056d7eSTejun Heo * -EINVAL if the request is invalid. 324bd056d7eSTejun Heo */ 325bd056d7eSTejun Heo int ata_build_rw_tf(struct ata_taskfile *tf, struct ata_device *dev, 326bd056d7eSTejun Heo u64 block, u32 n_block, unsigned int tf_flags, 327bd056d7eSTejun Heo unsigned int tag) 328bd056d7eSTejun Heo { 329bd056d7eSTejun Heo tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 330bd056d7eSTejun Heo tf->flags |= tf_flags; 331bd056d7eSTejun Heo 3326d1245bfSTejun Heo if (ata_ncq_enabled(dev) && likely(tag != ATA_TAG_INTERNAL)) { 333bd056d7eSTejun Heo /* yay, NCQ */ 334bd056d7eSTejun Heo if (!lba_48_ok(block, n_block)) 335bd056d7eSTejun Heo return -ERANGE; 336bd056d7eSTejun Heo 337bd056d7eSTejun Heo tf->protocol = ATA_PROT_NCQ; 338bd056d7eSTejun Heo tf->flags |= ATA_TFLAG_LBA | ATA_TFLAG_LBA48; 339bd056d7eSTejun Heo 340bd056d7eSTejun Heo if (tf->flags & ATA_TFLAG_WRITE) 341bd056d7eSTejun Heo tf->command = ATA_CMD_FPDMA_WRITE; 342bd056d7eSTejun Heo else 343bd056d7eSTejun Heo tf->command = ATA_CMD_FPDMA_READ; 344bd056d7eSTejun Heo 345bd056d7eSTejun Heo tf->nsect = tag << 3; 346bd056d7eSTejun Heo tf->hob_feature = (n_block >> 8) & 0xff; 347bd056d7eSTejun Heo tf->feature = n_block & 0xff; 348bd056d7eSTejun Heo 349bd056d7eSTejun Heo tf->hob_lbah = (block >> 40) & 0xff; 350bd056d7eSTejun Heo tf->hob_lbam = (block >> 32) & 0xff; 351bd056d7eSTejun Heo tf->hob_lbal = (block >> 24) & 0xff; 352bd056d7eSTejun Heo tf->lbah = (block >> 16) & 0xff; 353bd056d7eSTejun Heo tf->lbam = (block >> 8) & 0xff; 354bd056d7eSTejun Heo tf->lbal = block & 0xff; 355bd056d7eSTejun Heo 356bd056d7eSTejun Heo tf->device = 1 << 6; 357bd056d7eSTejun Heo if (tf->flags & ATA_TFLAG_FUA) 358bd056d7eSTejun Heo tf->device |= 1 << 7; 359bd056d7eSTejun Heo } else if (dev->flags & ATA_DFLAG_LBA) { 360bd056d7eSTejun Heo tf->flags |= ATA_TFLAG_LBA; 361bd056d7eSTejun Heo 362bd056d7eSTejun Heo if (lba_28_ok(block, n_block)) { 363bd056d7eSTejun Heo /* use LBA28 */ 364bd056d7eSTejun Heo tf->device |= (block >> 24) & 0xf; 365bd056d7eSTejun Heo } else if (lba_48_ok(block, n_block)) { 366bd056d7eSTejun Heo if (!(dev->flags & ATA_DFLAG_LBA48)) 367bd056d7eSTejun Heo return -ERANGE; 368bd056d7eSTejun Heo 369bd056d7eSTejun Heo /* use LBA48 */ 370bd056d7eSTejun Heo tf->flags |= ATA_TFLAG_LBA48; 371bd056d7eSTejun Heo 372bd056d7eSTejun Heo tf->hob_nsect = (n_block >> 8) & 0xff; 373bd056d7eSTejun Heo 374bd056d7eSTejun Heo tf->hob_lbah = (block >> 40) & 0xff; 375bd056d7eSTejun Heo tf->hob_lbam = (block >> 32) & 0xff; 376bd056d7eSTejun Heo tf->hob_lbal = (block >> 24) & 0xff; 377bd056d7eSTejun Heo } else 378bd056d7eSTejun Heo /* request too large even for LBA48 */ 379bd056d7eSTejun Heo return -ERANGE; 380bd056d7eSTejun Heo 381bd056d7eSTejun Heo if (unlikely(ata_rwcmd_protocol(tf, dev) < 0)) 382bd056d7eSTejun Heo return -EINVAL; 383bd056d7eSTejun Heo 384bd056d7eSTejun Heo tf->nsect = n_block & 0xff; 385bd056d7eSTejun Heo 386bd056d7eSTejun Heo tf->lbah = (block >> 16) & 0xff; 387bd056d7eSTejun Heo tf->lbam = (block >> 8) & 0xff; 388bd056d7eSTejun Heo tf->lbal = block & 0xff; 389bd056d7eSTejun Heo 390bd056d7eSTejun Heo tf->device |= ATA_LBA; 391bd056d7eSTejun Heo } else { 392bd056d7eSTejun Heo /* CHS */ 393bd056d7eSTejun Heo u32 sect, head, cyl, track; 394bd056d7eSTejun Heo 395bd056d7eSTejun Heo /* The request -may- be too large for CHS addressing. */ 396bd056d7eSTejun Heo if (!lba_28_ok(block, n_block)) 397bd056d7eSTejun Heo return -ERANGE; 398bd056d7eSTejun Heo 399bd056d7eSTejun Heo if (unlikely(ata_rwcmd_protocol(tf, dev) < 0)) 400bd056d7eSTejun Heo return -EINVAL; 401bd056d7eSTejun Heo 402bd056d7eSTejun Heo /* Convert LBA to CHS */ 403bd056d7eSTejun Heo track = (u32)block / dev->sectors; 404bd056d7eSTejun Heo cyl = track / dev->heads; 405bd056d7eSTejun Heo head = track % dev->heads; 406bd056d7eSTejun Heo sect = (u32)block % dev->sectors + 1; 407bd056d7eSTejun Heo 408bd056d7eSTejun Heo DPRINTK("block %u track %u cyl %u head %u sect %u\n", 409bd056d7eSTejun Heo (u32)block, track, cyl, head, sect); 410bd056d7eSTejun Heo 411bd056d7eSTejun Heo /* Check whether the converted CHS can fit. 412bd056d7eSTejun Heo Cylinder: 0-65535 413bd056d7eSTejun Heo Head: 0-15 414bd056d7eSTejun Heo Sector: 1-255*/ 415bd056d7eSTejun Heo if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect)) 416bd056d7eSTejun Heo return -ERANGE; 417bd056d7eSTejun Heo 418bd056d7eSTejun Heo tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */ 419bd056d7eSTejun Heo tf->lbal = sect; 420bd056d7eSTejun Heo tf->lbam = cyl; 421bd056d7eSTejun Heo tf->lbah = cyl >> 8; 422bd056d7eSTejun Heo tf->device |= head; 423bd056d7eSTejun Heo } 424bd056d7eSTejun Heo 425bd056d7eSTejun Heo return 0; 426bd056d7eSTejun Heo } 427bd056d7eSTejun Heo 428bd056d7eSTejun Heo /** 429c6fd2807SJeff Garzik * ata_pack_xfermask - Pack pio, mwdma and udma masks into xfer_mask 430c6fd2807SJeff Garzik * @pio_mask: pio_mask 431c6fd2807SJeff Garzik * @mwdma_mask: mwdma_mask 432c6fd2807SJeff Garzik * @udma_mask: udma_mask 433c6fd2807SJeff Garzik * 434c6fd2807SJeff Garzik * Pack @pio_mask, @mwdma_mask and @udma_mask into a single 435c6fd2807SJeff Garzik * unsigned int xfer_mask. 436c6fd2807SJeff Garzik * 437c6fd2807SJeff Garzik * LOCKING: 438c6fd2807SJeff Garzik * None. 439c6fd2807SJeff Garzik * 440c6fd2807SJeff Garzik * RETURNS: 441c6fd2807SJeff Garzik * Packed xfer_mask. 442c6fd2807SJeff Garzik */ 443c6fd2807SJeff Garzik static unsigned int ata_pack_xfermask(unsigned int pio_mask, 444c6fd2807SJeff Garzik unsigned int mwdma_mask, 445c6fd2807SJeff Garzik unsigned int udma_mask) 446c6fd2807SJeff Garzik { 447c6fd2807SJeff Garzik return ((pio_mask << ATA_SHIFT_PIO) & ATA_MASK_PIO) | 448c6fd2807SJeff Garzik ((mwdma_mask << ATA_SHIFT_MWDMA) & ATA_MASK_MWDMA) | 449c6fd2807SJeff Garzik ((udma_mask << ATA_SHIFT_UDMA) & ATA_MASK_UDMA); 450c6fd2807SJeff Garzik } 451c6fd2807SJeff Garzik 452c6fd2807SJeff Garzik /** 453c6fd2807SJeff Garzik * ata_unpack_xfermask - Unpack xfer_mask into pio, mwdma and udma masks 454c6fd2807SJeff Garzik * @xfer_mask: xfer_mask to unpack 455c6fd2807SJeff Garzik * @pio_mask: resulting pio_mask 456c6fd2807SJeff Garzik * @mwdma_mask: resulting mwdma_mask 457c6fd2807SJeff Garzik * @udma_mask: resulting udma_mask 458c6fd2807SJeff Garzik * 459c6fd2807SJeff Garzik * Unpack @xfer_mask into @pio_mask, @mwdma_mask and @udma_mask. 460c6fd2807SJeff Garzik * Any NULL distination masks will be ignored. 461c6fd2807SJeff Garzik */ 462c6fd2807SJeff Garzik static void ata_unpack_xfermask(unsigned int xfer_mask, 463c6fd2807SJeff Garzik unsigned int *pio_mask, 464c6fd2807SJeff Garzik unsigned int *mwdma_mask, 465c6fd2807SJeff Garzik unsigned int *udma_mask) 466c6fd2807SJeff Garzik { 467c6fd2807SJeff Garzik if (pio_mask) 468c6fd2807SJeff Garzik *pio_mask = (xfer_mask & ATA_MASK_PIO) >> ATA_SHIFT_PIO; 469c6fd2807SJeff Garzik if (mwdma_mask) 470c6fd2807SJeff Garzik *mwdma_mask = (xfer_mask & ATA_MASK_MWDMA) >> ATA_SHIFT_MWDMA; 471c6fd2807SJeff Garzik if (udma_mask) 472c6fd2807SJeff Garzik *udma_mask = (xfer_mask & ATA_MASK_UDMA) >> ATA_SHIFT_UDMA; 473c6fd2807SJeff Garzik } 474c6fd2807SJeff Garzik 475c6fd2807SJeff Garzik static const struct ata_xfer_ent { 476c6fd2807SJeff Garzik int shift, bits; 477c6fd2807SJeff Garzik u8 base; 478c6fd2807SJeff Garzik } ata_xfer_tbl[] = { 479c6fd2807SJeff Garzik { ATA_SHIFT_PIO, ATA_BITS_PIO, XFER_PIO_0 }, 480c6fd2807SJeff Garzik { ATA_SHIFT_MWDMA, ATA_BITS_MWDMA, XFER_MW_DMA_0 }, 481c6fd2807SJeff Garzik { ATA_SHIFT_UDMA, ATA_BITS_UDMA, XFER_UDMA_0 }, 482c6fd2807SJeff Garzik { -1, }, 483c6fd2807SJeff Garzik }; 484c6fd2807SJeff Garzik 485c6fd2807SJeff Garzik /** 486c6fd2807SJeff Garzik * ata_xfer_mask2mode - Find matching XFER_* for the given xfer_mask 487c6fd2807SJeff Garzik * @xfer_mask: xfer_mask of interest 488c6fd2807SJeff Garzik * 489c6fd2807SJeff Garzik * Return matching XFER_* value for @xfer_mask. Only the highest 490c6fd2807SJeff Garzik * bit of @xfer_mask is considered. 491c6fd2807SJeff Garzik * 492c6fd2807SJeff Garzik * LOCKING: 493c6fd2807SJeff Garzik * None. 494c6fd2807SJeff Garzik * 495c6fd2807SJeff Garzik * RETURNS: 496c6fd2807SJeff Garzik * Matching XFER_* value, 0 if no match found. 497c6fd2807SJeff Garzik */ 498c6fd2807SJeff Garzik static u8 ata_xfer_mask2mode(unsigned int xfer_mask) 499c6fd2807SJeff Garzik { 500c6fd2807SJeff Garzik int highbit = fls(xfer_mask) - 1; 501c6fd2807SJeff Garzik const struct ata_xfer_ent *ent; 502c6fd2807SJeff Garzik 503c6fd2807SJeff Garzik for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) 504c6fd2807SJeff Garzik if (highbit >= ent->shift && highbit < ent->shift + ent->bits) 505c6fd2807SJeff Garzik return ent->base + highbit - ent->shift; 506c6fd2807SJeff Garzik return 0; 507c6fd2807SJeff Garzik } 508c6fd2807SJeff Garzik 509c6fd2807SJeff Garzik /** 510c6fd2807SJeff Garzik * ata_xfer_mode2mask - Find matching xfer_mask for XFER_* 511c6fd2807SJeff Garzik * @xfer_mode: XFER_* of interest 512c6fd2807SJeff Garzik * 513c6fd2807SJeff Garzik * Return matching xfer_mask for @xfer_mode. 514c6fd2807SJeff Garzik * 515c6fd2807SJeff Garzik * LOCKING: 516c6fd2807SJeff Garzik * None. 517c6fd2807SJeff Garzik * 518c6fd2807SJeff Garzik * RETURNS: 519c6fd2807SJeff Garzik * Matching xfer_mask, 0 if no match found. 520c6fd2807SJeff Garzik */ 521c6fd2807SJeff Garzik static unsigned int ata_xfer_mode2mask(u8 xfer_mode) 522c6fd2807SJeff Garzik { 523c6fd2807SJeff Garzik const struct ata_xfer_ent *ent; 524c6fd2807SJeff Garzik 525c6fd2807SJeff Garzik for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) 526c6fd2807SJeff Garzik if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits) 527c6fd2807SJeff Garzik return 1 << (ent->shift + xfer_mode - ent->base); 528c6fd2807SJeff Garzik return 0; 529c6fd2807SJeff Garzik } 530c6fd2807SJeff Garzik 531c6fd2807SJeff Garzik /** 532c6fd2807SJeff Garzik * ata_xfer_mode2shift - Find matching xfer_shift for XFER_* 533c6fd2807SJeff Garzik * @xfer_mode: XFER_* of interest 534c6fd2807SJeff Garzik * 535c6fd2807SJeff Garzik * Return matching xfer_shift for @xfer_mode. 536c6fd2807SJeff Garzik * 537c6fd2807SJeff Garzik * LOCKING: 538c6fd2807SJeff Garzik * None. 539c6fd2807SJeff Garzik * 540c6fd2807SJeff Garzik * RETURNS: 541c6fd2807SJeff Garzik * Matching xfer_shift, -1 if no match found. 542c6fd2807SJeff Garzik */ 543c6fd2807SJeff Garzik static int ata_xfer_mode2shift(unsigned int xfer_mode) 544c6fd2807SJeff Garzik { 545c6fd2807SJeff Garzik const struct ata_xfer_ent *ent; 546c6fd2807SJeff Garzik 547c6fd2807SJeff Garzik for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) 548c6fd2807SJeff Garzik if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits) 549c6fd2807SJeff Garzik return ent->shift; 550c6fd2807SJeff Garzik return -1; 551c6fd2807SJeff Garzik } 552c6fd2807SJeff Garzik 553c6fd2807SJeff Garzik /** 554c6fd2807SJeff Garzik * ata_mode_string - convert xfer_mask to string 555c6fd2807SJeff Garzik * @xfer_mask: mask of bits supported; only highest bit counts. 556c6fd2807SJeff Garzik * 557c6fd2807SJeff Garzik * Determine string which represents the highest speed 558c6fd2807SJeff Garzik * (highest bit in @modemask). 559c6fd2807SJeff Garzik * 560c6fd2807SJeff Garzik * LOCKING: 561c6fd2807SJeff Garzik * None. 562c6fd2807SJeff Garzik * 563c6fd2807SJeff Garzik * RETURNS: 564c6fd2807SJeff Garzik * Constant C string representing highest speed listed in 565c6fd2807SJeff Garzik * @mode_mask, or the constant C string "<n/a>". 566c6fd2807SJeff Garzik */ 567c6fd2807SJeff Garzik static const char *ata_mode_string(unsigned int xfer_mask) 568c6fd2807SJeff Garzik { 569c6fd2807SJeff Garzik static const char * const xfer_mode_str[] = { 570c6fd2807SJeff Garzik "PIO0", 571c6fd2807SJeff Garzik "PIO1", 572c6fd2807SJeff Garzik "PIO2", 573c6fd2807SJeff Garzik "PIO3", 574c6fd2807SJeff Garzik "PIO4", 575b352e57dSAlan Cox "PIO5", 576b352e57dSAlan Cox "PIO6", 577c6fd2807SJeff Garzik "MWDMA0", 578c6fd2807SJeff Garzik "MWDMA1", 579c6fd2807SJeff Garzik "MWDMA2", 580b352e57dSAlan Cox "MWDMA3", 581b352e57dSAlan Cox "MWDMA4", 582c6fd2807SJeff Garzik "UDMA/16", 583c6fd2807SJeff Garzik "UDMA/25", 584c6fd2807SJeff Garzik "UDMA/33", 585c6fd2807SJeff Garzik "UDMA/44", 586c6fd2807SJeff Garzik "UDMA/66", 587c6fd2807SJeff Garzik "UDMA/100", 588c6fd2807SJeff Garzik "UDMA/133", 589c6fd2807SJeff Garzik "UDMA7", 590c6fd2807SJeff Garzik }; 591c6fd2807SJeff Garzik int highbit; 592c6fd2807SJeff Garzik 593c6fd2807SJeff Garzik highbit = fls(xfer_mask) - 1; 594c6fd2807SJeff Garzik if (highbit >= 0 && highbit < ARRAY_SIZE(xfer_mode_str)) 595c6fd2807SJeff Garzik return xfer_mode_str[highbit]; 596c6fd2807SJeff Garzik return "<n/a>"; 597c6fd2807SJeff Garzik } 598c6fd2807SJeff Garzik 599c6fd2807SJeff Garzik static const char *sata_spd_string(unsigned int spd) 600c6fd2807SJeff Garzik { 601c6fd2807SJeff Garzik static const char * const spd_str[] = { 602c6fd2807SJeff Garzik "1.5 Gbps", 603c6fd2807SJeff Garzik "3.0 Gbps", 604c6fd2807SJeff Garzik }; 605c6fd2807SJeff Garzik 606c6fd2807SJeff Garzik if (spd == 0 || (spd - 1) >= ARRAY_SIZE(spd_str)) 607c6fd2807SJeff Garzik return "<unknown>"; 608c6fd2807SJeff Garzik return spd_str[spd - 1]; 609c6fd2807SJeff Garzik } 610c6fd2807SJeff Garzik 611c6fd2807SJeff Garzik void ata_dev_disable(struct ata_device *dev) 612c6fd2807SJeff Garzik { 61309d7f9b0STejun Heo if (ata_dev_enabled(dev)) { 6149af5c9c9STejun Heo if (ata_msg_drv(dev->link->ap)) 615c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_WARNING, "disabled\n"); 6164ae72a1eSTejun Heo ata_down_xfermask_limit(dev, ATA_DNXFER_FORCE_PIO0 | 6174ae72a1eSTejun Heo ATA_DNXFER_QUIET); 618c6fd2807SJeff Garzik dev->class++; 619c6fd2807SJeff Garzik } 620c6fd2807SJeff Garzik } 621c6fd2807SJeff Garzik 622c6fd2807SJeff Garzik /** 623c6fd2807SJeff Garzik * ata_devchk - PATA device presence detection 624c6fd2807SJeff Garzik * @ap: ATA channel to examine 625c6fd2807SJeff Garzik * @device: Device to examine (starting at zero) 626c6fd2807SJeff Garzik * 6270d5ff566STejun Heo * This technique was originally described in 6280d5ff566STejun Heo * Hale Landis's ATADRVR (www.ata-atapi.com), and 6290d5ff566STejun Heo * later found its way into the ATA/ATAPI spec. 6300d5ff566STejun Heo * 6310d5ff566STejun Heo * Write a pattern to the ATA shadow registers, 6320d5ff566STejun Heo * and if a device is present, it will respond by 6330d5ff566STejun Heo * correctly storing and echoing back the 6340d5ff566STejun Heo * ATA shadow register contents. 635c6fd2807SJeff Garzik * 636c6fd2807SJeff Garzik * LOCKING: 637c6fd2807SJeff Garzik * caller. 638c6fd2807SJeff Garzik */ 639c6fd2807SJeff Garzik 6400d5ff566STejun Heo static unsigned int ata_devchk(struct ata_port *ap, unsigned int device) 641c6fd2807SJeff Garzik { 6420d5ff566STejun Heo struct ata_ioports *ioaddr = &ap->ioaddr; 6430d5ff566STejun Heo u8 nsect, lbal; 6440d5ff566STejun Heo 6450d5ff566STejun Heo ap->ops->dev_select(ap, device); 6460d5ff566STejun Heo 6470d5ff566STejun Heo iowrite8(0x55, ioaddr->nsect_addr); 6480d5ff566STejun Heo iowrite8(0xaa, ioaddr->lbal_addr); 6490d5ff566STejun Heo 6500d5ff566STejun Heo iowrite8(0xaa, ioaddr->nsect_addr); 6510d5ff566STejun Heo iowrite8(0x55, ioaddr->lbal_addr); 6520d5ff566STejun Heo 6530d5ff566STejun Heo iowrite8(0x55, ioaddr->nsect_addr); 6540d5ff566STejun Heo iowrite8(0xaa, ioaddr->lbal_addr); 6550d5ff566STejun Heo 6560d5ff566STejun Heo nsect = ioread8(ioaddr->nsect_addr); 6570d5ff566STejun Heo lbal = ioread8(ioaddr->lbal_addr); 6580d5ff566STejun Heo 6590d5ff566STejun Heo if ((nsect == 0x55) && (lbal == 0xaa)) 6600d5ff566STejun Heo return 1; /* we found a device */ 6610d5ff566STejun Heo 6620d5ff566STejun Heo return 0; /* nothing found */ 663c6fd2807SJeff Garzik } 664c6fd2807SJeff Garzik 665c6fd2807SJeff Garzik /** 666c6fd2807SJeff Garzik * ata_dev_classify - determine device type based on ATA-spec signature 667c6fd2807SJeff Garzik * @tf: ATA taskfile register set for device to be identified 668c6fd2807SJeff Garzik * 669c6fd2807SJeff Garzik * Determine from taskfile register contents whether a device is 670c6fd2807SJeff Garzik * ATA or ATAPI, as per "Signature and persistence" section 671c6fd2807SJeff Garzik * of ATA/PI spec (volume 1, sect 5.14). 672c6fd2807SJeff Garzik * 673c6fd2807SJeff Garzik * LOCKING: 674c6fd2807SJeff Garzik * None. 675c6fd2807SJeff Garzik * 676c6fd2807SJeff Garzik * RETURNS: 677633273a3STejun Heo * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, %ATA_DEV_PMP or 678633273a3STejun Heo * %ATA_DEV_UNKNOWN the event of failure. 679c6fd2807SJeff Garzik */ 680c6fd2807SJeff Garzik unsigned int ata_dev_classify(const struct ata_taskfile *tf) 681c6fd2807SJeff Garzik { 682c6fd2807SJeff Garzik /* Apple's open source Darwin code hints that some devices only 683c6fd2807SJeff Garzik * put a proper signature into the LBA mid/high registers, 684c6fd2807SJeff Garzik * So, we only check those. It's sufficient for uniqueness. 685633273a3STejun Heo * 686633273a3STejun Heo * ATA/ATAPI-7 (d1532v1r1: Feb. 19, 2003) specified separate 687633273a3STejun Heo * signatures for ATA and ATAPI devices attached on SerialATA, 688633273a3STejun Heo * 0x3c/0xc3 and 0x69/0x96 respectively. However, SerialATA 689633273a3STejun Heo * spec has never mentioned about using different signatures 690633273a3STejun Heo * for ATA/ATAPI devices. Then, Serial ATA II: Port 691633273a3STejun Heo * Multiplier specification began to use 0x69/0x96 to identify 692633273a3STejun Heo * port multpliers and 0x3c/0xc3 to identify SEMB device. 693633273a3STejun Heo * ATA/ATAPI-7 dropped descriptions about 0x3c/0xc3 and 694633273a3STejun Heo * 0x69/0x96 shortly and described them as reserved for 695633273a3STejun Heo * SerialATA. 696633273a3STejun Heo * 697633273a3STejun Heo * We follow the current spec and consider that 0x69/0x96 698633273a3STejun Heo * identifies a port multiplier and 0x3c/0xc3 a SEMB device. 699c6fd2807SJeff Garzik */ 700633273a3STejun Heo if ((tf->lbam == 0) && (tf->lbah == 0)) { 701c6fd2807SJeff Garzik DPRINTK("found ATA device by sig\n"); 702c6fd2807SJeff Garzik return ATA_DEV_ATA; 703c6fd2807SJeff Garzik } 704c6fd2807SJeff Garzik 705633273a3STejun Heo if ((tf->lbam == 0x14) && (tf->lbah == 0xeb)) { 706c6fd2807SJeff Garzik DPRINTK("found ATAPI device by sig\n"); 707c6fd2807SJeff Garzik return ATA_DEV_ATAPI; 708c6fd2807SJeff Garzik } 709c6fd2807SJeff Garzik 710633273a3STejun Heo if ((tf->lbam == 0x69) && (tf->lbah == 0x96)) { 711633273a3STejun Heo DPRINTK("found PMP device by sig\n"); 712633273a3STejun Heo return ATA_DEV_PMP; 713633273a3STejun Heo } 714633273a3STejun Heo 715633273a3STejun Heo if ((tf->lbam == 0x3c) && (tf->lbah == 0xc3)) { 716633273a3STejun Heo printk("ata: SEMB device ignored\n"); 717633273a3STejun Heo return ATA_DEV_SEMB_UNSUP; /* not yet */ 718633273a3STejun Heo } 719633273a3STejun Heo 720c6fd2807SJeff Garzik DPRINTK("unknown device\n"); 721c6fd2807SJeff Garzik return ATA_DEV_UNKNOWN; 722c6fd2807SJeff Garzik } 723c6fd2807SJeff Garzik 724c6fd2807SJeff Garzik /** 725c6fd2807SJeff Garzik * ata_dev_try_classify - Parse returned ATA device signature 7263f19859eSTejun Heo * @dev: ATA device to classify (starting at zero) 7273f19859eSTejun Heo * @present: device seems present 728c6fd2807SJeff Garzik * @r_err: Value of error register on completion 729c6fd2807SJeff Garzik * 730c6fd2807SJeff Garzik * After an event -- SRST, E.D.D., or SATA COMRESET -- occurs, 731c6fd2807SJeff Garzik * an ATA/ATAPI-defined set of values is placed in the ATA 732c6fd2807SJeff Garzik * shadow registers, indicating the results of device detection 733c6fd2807SJeff Garzik * and diagnostics. 734c6fd2807SJeff Garzik * 735c6fd2807SJeff Garzik * Select the ATA device, and read the values from the ATA shadow 736c6fd2807SJeff Garzik * registers. Then parse according to the Error register value, 737c6fd2807SJeff Garzik * and the spec-defined values examined by ata_dev_classify(). 738c6fd2807SJeff Garzik * 739c6fd2807SJeff Garzik * LOCKING: 740c6fd2807SJeff Garzik * caller. 741c6fd2807SJeff Garzik * 742c6fd2807SJeff Garzik * RETURNS: 743c6fd2807SJeff Garzik * Device type - %ATA_DEV_ATA, %ATA_DEV_ATAPI or %ATA_DEV_NONE. 744c6fd2807SJeff Garzik */ 7453f19859eSTejun Heo unsigned int ata_dev_try_classify(struct ata_device *dev, int present, 7463f19859eSTejun Heo u8 *r_err) 747c6fd2807SJeff Garzik { 7483f19859eSTejun Heo struct ata_port *ap = dev->link->ap; 749c6fd2807SJeff Garzik struct ata_taskfile tf; 750c6fd2807SJeff Garzik unsigned int class; 751c6fd2807SJeff Garzik u8 err; 752c6fd2807SJeff Garzik 7533f19859eSTejun Heo ap->ops->dev_select(ap, dev->devno); 754c6fd2807SJeff Garzik 755c6fd2807SJeff Garzik memset(&tf, 0, sizeof(tf)); 756c6fd2807SJeff Garzik 757c6fd2807SJeff Garzik ap->ops->tf_read(ap, &tf); 758c6fd2807SJeff Garzik err = tf.feature; 759c6fd2807SJeff Garzik if (r_err) 760c6fd2807SJeff Garzik *r_err = err; 761c6fd2807SJeff Garzik 76293590859SAlan Cox /* see if device passed diags: if master then continue and warn later */ 7633f19859eSTejun Heo if (err == 0 && dev->devno == 0) 76493590859SAlan Cox /* diagnostic fail : do nothing _YET_ */ 7653f19859eSTejun Heo dev->horkage |= ATA_HORKAGE_DIAGNOSTIC; 76693590859SAlan Cox else if (err == 1) 767c6fd2807SJeff Garzik /* do nothing */ ; 7683f19859eSTejun Heo else if ((dev->devno == 0) && (err == 0x81)) 769c6fd2807SJeff Garzik /* do nothing */ ; 770c6fd2807SJeff Garzik else 771c6fd2807SJeff Garzik return ATA_DEV_NONE; 772c6fd2807SJeff Garzik 773c6fd2807SJeff Garzik /* determine if device is ATA or ATAPI */ 774c6fd2807SJeff Garzik class = ata_dev_classify(&tf); 775c6fd2807SJeff Garzik 776d7fbee05STejun Heo if (class == ATA_DEV_UNKNOWN) { 777d7fbee05STejun Heo /* If the device failed diagnostic, it's likely to 778d7fbee05STejun Heo * have reported incorrect device signature too. 779d7fbee05STejun Heo * Assume ATA device if the device seems present but 780d7fbee05STejun Heo * device signature is invalid with diagnostic 781d7fbee05STejun Heo * failure. 782d7fbee05STejun Heo */ 783d7fbee05STejun Heo if (present && (dev->horkage & ATA_HORKAGE_DIAGNOSTIC)) 784d7fbee05STejun Heo class = ATA_DEV_ATA; 785d7fbee05STejun Heo else 786d7fbee05STejun Heo class = ATA_DEV_NONE; 787d7fbee05STejun Heo } else if ((class == ATA_DEV_ATA) && (ata_chk_status(ap) == 0)) 788d7fbee05STejun Heo class = ATA_DEV_NONE; 789d7fbee05STejun Heo 790c6fd2807SJeff Garzik return class; 791c6fd2807SJeff Garzik } 792c6fd2807SJeff Garzik 793c6fd2807SJeff Garzik /** 794c6fd2807SJeff Garzik * ata_id_string - Convert IDENTIFY DEVICE page into string 795c6fd2807SJeff Garzik * @id: IDENTIFY DEVICE results we will examine 796c6fd2807SJeff Garzik * @s: string into which data is output 797c6fd2807SJeff Garzik * @ofs: offset into identify device page 798c6fd2807SJeff Garzik * @len: length of string to return. must be an even number. 799c6fd2807SJeff Garzik * 800c6fd2807SJeff Garzik * The strings in the IDENTIFY DEVICE page are broken up into 801c6fd2807SJeff Garzik * 16-bit chunks. Run through the string, and output each 802c6fd2807SJeff Garzik * 8-bit chunk linearly, regardless of platform. 803c6fd2807SJeff Garzik * 804c6fd2807SJeff Garzik * LOCKING: 805c6fd2807SJeff Garzik * caller. 806c6fd2807SJeff Garzik */ 807c6fd2807SJeff Garzik 808c6fd2807SJeff Garzik void ata_id_string(const u16 *id, unsigned char *s, 809c6fd2807SJeff Garzik unsigned int ofs, unsigned int len) 810c6fd2807SJeff Garzik { 811c6fd2807SJeff Garzik unsigned int c; 812c6fd2807SJeff Garzik 813c6fd2807SJeff Garzik while (len > 0) { 814c6fd2807SJeff Garzik c = id[ofs] >> 8; 815c6fd2807SJeff Garzik *s = c; 816c6fd2807SJeff Garzik s++; 817c6fd2807SJeff Garzik 818c6fd2807SJeff Garzik c = id[ofs] & 0xff; 819c6fd2807SJeff Garzik *s = c; 820c6fd2807SJeff Garzik s++; 821c6fd2807SJeff Garzik 822c6fd2807SJeff Garzik ofs++; 823c6fd2807SJeff Garzik len -= 2; 824c6fd2807SJeff Garzik } 825c6fd2807SJeff Garzik } 826c6fd2807SJeff Garzik 827c6fd2807SJeff Garzik /** 828c6fd2807SJeff Garzik * ata_id_c_string - Convert IDENTIFY DEVICE page into C string 829c6fd2807SJeff Garzik * @id: IDENTIFY DEVICE results we will examine 830c6fd2807SJeff Garzik * @s: string into which data is output 831c6fd2807SJeff Garzik * @ofs: offset into identify device page 832c6fd2807SJeff Garzik * @len: length of string to return. must be an odd number. 833c6fd2807SJeff Garzik * 834c6fd2807SJeff Garzik * This function is identical to ata_id_string except that it 835c6fd2807SJeff Garzik * trims trailing spaces and terminates the resulting string with 836c6fd2807SJeff Garzik * null. @len must be actual maximum length (even number) + 1. 837c6fd2807SJeff Garzik * 838c6fd2807SJeff Garzik * LOCKING: 839c6fd2807SJeff Garzik * caller. 840c6fd2807SJeff Garzik */ 841c6fd2807SJeff Garzik void ata_id_c_string(const u16 *id, unsigned char *s, 842c6fd2807SJeff Garzik unsigned int ofs, unsigned int len) 843c6fd2807SJeff Garzik { 844c6fd2807SJeff Garzik unsigned char *p; 845c6fd2807SJeff Garzik 846c6fd2807SJeff Garzik WARN_ON(!(len & 1)); 847c6fd2807SJeff Garzik 848c6fd2807SJeff Garzik ata_id_string(id, s, ofs, len - 1); 849c6fd2807SJeff Garzik 850c6fd2807SJeff Garzik p = s + strnlen(s, len - 1); 851c6fd2807SJeff Garzik while (p > s && p[-1] == ' ') 852c6fd2807SJeff Garzik p--; 853c6fd2807SJeff Garzik *p = '\0'; 854c6fd2807SJeff Garzik } 855c6fd2807SJeff Garzik 856db6f8759STejun Heo static u64 ata_id_n_sectors(const u16 *id) 857db6f8759STejun Heo { 858db6f8759STejun Heo if (ata_id_has_lba(id)) { 859db6f8759STejun Heo if (ata_id_has_lba48(id)) 860db6f8759STejun Heo return ata_id_u64(id, 100); 861db6f8759STejun Heo else 862db6f8759STejun Heo return ata_id_u32(id, 60); 863db6f8759STejun Heo } else { 864db6f8759STejun Heo if (ata_id_current_chs_valid(id)) 865db6f8759STejun Heo return ata_id_u32(id, 57); 866db6f8759STejun Heo else 867db6f8759STejun Heo return id[1] * id[3] * id[6]; 868db6f8759STejun Heo } 869db6f8759STejun Heo } 870db6f8759STejun Heo 8711e999736SAlan Cox static u64 ata_tf_to_lba48(struct ata_taskfile *tf) 8721e999736SAlan Cox { 8731e999736SAlan Cox u64 sectors = 0; 8741e999736SAlan Cox 8751e999736SAlan Cox sectors |= ((u64)(tf->hob_lbah & 0xff)) << 40; 8761e999736SAlan Cox sectors |= ((u64)(tf->hob_lbam & 0xff)) << 32; 8771e999736SAlan Cox sectors |= (tf->hob_lbal & 0xff) << 24; 8781e999736SAlan Cox sectors |= (tf->lbah & 0xff) << 16; 8791e999736SAlan Cox sectors |= (tf->lbam & 0xff) << 8; 8801e999736SAlan Cox sectors |= (tf->lbal & 0xff); 8811e999736SAlan Cox 8821e999736SAlan Cox return ++sectors; 8831e999736SAlan Cox } 8841e999736SAlan Cox 8851e999736SAlan Cox static u64 ata_tf_to_lba(struct ata_taskfile *tf) 8861e999736SAlan Cox { 8871e999736SAlan Cox u64 sectors = 0; 8881e999736SAlan Cox 8891e999736SAlan Cox sectors |= (tf->device & 0x0f) << 24; 8901e999736SAlan Cox sectors |= (tf->lbah & 0xff) << 16; 8911e999736SAlan Cox sectors |= (tf->lbam & 0xff) << 8; 8921e999736SAlan Cox sectors |= (tf->lbal & 0xff); 8931e999736SAlan Cox 8941e999736SAlan Cox return ++sectors; 8951e999736SAlan Cox } 8961e999736SAlan Cox 8971e999736SAlan Cox /** 898c728a914STejun Heo * ata_read_native_max_address - Read native max address 899c728a914STejun Heo * @dev: target device 900c728a914STejun Heo * @max_sectors: out parameter for the result native max address 9011e999736SAlan Cox * 902c728a914STejun Heo * Perform an LBA48 or LBA28 native size query upon the device in 903c728a914STejun Heo * question. 904c728a914STejun Heo * 905c728a914STejun Heo * RETURNS: 906c728a914STejun Heo * 0 on success, -EACCES if command is aborted by the drive. 907c728a914STejun Heo * -EIO on other errors. 9081e999736SAlan Cox */ 909c728a914STejun Heo static int ata_read_native_max_address(struct ata_device *dev, u64 *max_sectors) 9101e999736SAlan Cox { 911c728a914STejun Heo unsigned int err_mask; 9121e999736SAlan Cox struct ata_taskfile tf; 913c728a914STejun Heo int lba48 = ata_id_has_lba48(dev->id); 9141e999736SAlan Cox 9151e999736SAlan Cox ata_tf_init(dev, &tf); 9161e999736SAlan Cox 917c728a914STejun Heo /* always clear all address registers */ 9181e999736SAlan Cox tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; 919c728a914STejun Heo 920c728a914STejun Heo if (lba48) { 921c728a914STejun Heo tf.command = ATA_CMD_READ_NATIVE_MAX_EXT; 922c728a914STejun Heo tf.flags |= ATA_TFLAG_LBA48; 923c728a914STejun Heo } else 924c728a914STejun Heo tf.command = ATA_CMD_READ_NATIVE_MAX; 925c728a914STejun Heo 9261e999736SAlan Cox tf.protocol |= ATA_PROT_NODATA; 927c728a914STejun Heo tf.device |= ATA_LBA; 9281e999736SAlan Cox 929c728a914STejun Heo err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0); 930c728a914STejun Heo if (err_mask) { 931c728a914STejun Heo ata_dev_printk(dev, KERN_WARNING, "failed to read native " 932c728a914STejun Heo "max address (err_mask=0x%x)\n", err_mask); 933c728a914STejun Heo if (err_mask == AC_ERR_DEV && (tf.feature & ATA_ABORTED)) 934c728a914STejun Heo return -EACCES; 935c728a914STejun Heo return -EIO; 936c728a914STejun Heo } 937c728a914STejun Heo 938c728a914STejun Heo if (lba48) 939c728a914STejun Heo *max_sectors = ata_tf_to_lba48(&tf); 940c728a914STejun Heo else 941c728a914STejun Heo *max_sectors = ata_tf_to_lba(&tf); 94293328e11SAlan Cox if (dev->horkage & ATA_HORKAGE_HPA_SIZE) 94393328e11SAlan Cox (*max_sectors)--; 9441e999736SAlan Cox return 0; 9451e999736SAlan Cox } 9461e999736SAlan Cox 9471e999736SAlan Cox /** 948c728a914STejun Heo * ata_set_max_sectors - Set max sectors 949c728a914STejun Heo * @dev: target device 9506b38d1d1SRandy Dunlap * @new_sectors: new max sectors value to set for the device 9511e999736SAlan Cox * 952c728a914STejun Heo * Set max sectors of @dev to @new_sectors. 953c728a914STejun Heo * 954c728a914STejun Heo * RETURNS: 955c728a914STejun Heo * 0 on success, -EACCES if command is aborted or denied (due to 956c728a914STejun Heo * previous non-volatile SET_MAX) by the drive. -EIO on other 957c728a914STejun Heo * errors. 9581e999736SAlan Cox */ 95905027adcSTejun Heo static int ata_set_max_sectors(struct ata_device *dev, u64 new_sectors) 9601e999736SAlan Cox { 961c728a914STejun Heo unsigned int err_mask; 9621e999736SAlan Cox struct ata_taskfile tf; 963c728a914STejun Heo int lba48 = ata_id_has_lba48(dev->id); 9641e999736SAlan Cox 9651e999736SAlan Cox new_sectors--; 9661e999736SAlan Cox 9671e999736SAlan Cox ata_tf_init(dev, &tf); 9681e999736SAlan Cox 969c728a914STejun Heo tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; 9701e999736SAlan Cox 971c728a914STejun Heo if (lba48) { 972c728a914STejun Heo tf.command = ATA_CMD_SET_MAX_EXT; 973c728a914STejun Heo tf.flags |= ATA_TFLAG_LBA48; 9741e999736SAlan Cox 9751e999736SAlan Cox tf.hob_lbal = (new_sectors >> 24) & 0xff; 9761e999736SAlan Cox tf.hob_lbam = (new_sectors >> 32) & 0xff; 9771e999736SAlan Cox tf.hob_lbah = (new_sectors >> 40) & 0xff; 9781e582ba4STejun Heo } else { 9791e999736SAlan Cox tf.command = ATA_CMD_SET_MAX; 980c728a914STejun Heo 9811e582ba4STejun Heo tf.device |= (new_sectors >> 24) & 0xf; 9821e582ba4STejun Heo } 9831e582ba4STejun Heo 9841e999736SAlan Cox tf.protocol |= ATA_PROT_NODATA; 985c728a914STejun Heo tf.device |= ATA_LBA; 9861e999736SAlan Cox 9871e999736SAlan Cox tf.lbal = (new_sectors >> 0) & 0xff; 9881e999736SAlan Cox tf.lbam = (new_sectors >> 8) & 0xff; 9891e999736SAlan Cox tf.lbah = (new_sectors >> 16) & 0xff; 9901e999736SAlan Cox 991c728a914STejun Heo err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0); 992c728a914STejun Heo if (err_mask) { 993c728a914STejun Heo ata_dev_printk(dev, KERN_WARNING, "failed to set " 994c728a914STejun Heo "max address (err_mask=0x%x)\n", err_mask); 995c728a914STejun Heo if (err_mask == AC_ERR_DEV && 996c728a914STejun Heo (tf.feature & (ATA_ABORTED | ATA_IDNF))) 997c728a914STejun Heo return -EACCES; 998c728a914STejun Heo return -EIO; 999c728a914STejun Heo } 1000c728a914STejun Heo 10011e999736SAlan Cox return 0; 10021e999736SAlan Cox } 10031e999736SAlan Cox 10041e999736SAlan Cox /** 10051e999736SAlan Cox * ata_hpa_resize - Resize a device with an HPA set 10061e999736SAlan Cox * @dev: Device to resize 10071e999736SAlan Cox * 10081e999736SAlan Cox * Read the size of an LBA28 or LBA48 disk with HPA features and resize 10091e999736SAlan Cox * it if required to the full size of the media. The caller must check 10101e999736SAlan Cox * the drive has the HPA feature set enabled. 101105027adcSTejun Heo * 101205027adcSTejun Heo * RETURNS: 101305027adcSTejun Heo * 0 on success, -errno on failure. 10141e999736SAlan Cox */ 101505027adcSTejun Heo static int ata_hpa_resize(struct ata_device *dev) 10161e999736SAlan Cox { 101705027adcSTejun Heo struct ata_eh_context *ehc = &dev->link->eh_context; 101805027adcSTejun Heo int print_info = ehc->i.flags & ATA_EHI_PRINTINFO; 101905027adcSTejun Heo u64 sectors = ata_id_n_sectors(dev->id); 102005027adcSTejun Heo u64 native_sectors; 1021c728a914STejun Heo int rc; 10221e999736SAlan Cox 102305027adcSTejun Heo /* do we need to do it? */ 102405027adcSTejun Heo if (dev->class != ATA_DEV_ATA || 102505027adcSTejun Heo !ata_id_has_lba(dev->id) || !ata_id_hpa_enabled(dev->id) || 102605027adcSTejun Heo (dev->horkage & ATA_HORKAGE_BROKEN_HPA)) 1027c728a914STejun Heo return 0; 10281e999736SAlan Cox 102905027adcSTejun Heo /* read native max address */ 103005027adcSTejun Heo rc = ata_read_native_max_address(dev, &native_sectors); 103105027adcSTejun Heo if (rc) { 103205027adcSTejun Heo /* If HPA isn't going to be unlocked, skip HPA 103305027adcSTejun Heo * resizing from the next try. 103405027adcSTejun Heo */ 103505027adcSTejun Heo if (!ata_ignore_hpa) { 103605027adcSTejun Heo ata_dev_printk(dev, KERN_WARNING, "HPA support seems " 103705027adcSTejun Heo "broken, will skip HPA handling\n"); 103805027adcSTejun Heo dev->horkage |= ATA_HORKAGE_BROKEN_HPA; 103905027adcSTejun Heo 104005027adcSTejun Heo /* we can continue if device aborted the command */ 104105027adcSTejun Heo if (rc == -EACCES) 104205027adcSTejun Heo rc = 0; 104305027adcSTejun Heo } 104405027adcSTejun Heo 104505027adcSTejun Heo return rc; 104605027adcSTejun Heo } 104705027adcSTejun Heo 104805027adcSTejun Heo /* nothing to do? */ 104905027adcSTejun Heo if (native_sectors <= sectors || !ata_ignore_hpa) { 105005027adcSTejun Heo if (!print_info || native_sectors == sectors) 105105027adcSTejun Heo return 0; 105205027adcSTejun Heo 105305027adcSTejun Heo if (native_sectors > sectors) 10541e999736SAlan Cox ata_dev_printk(dev, KERN_INFO, 105505027adcSTejun Heo "HPA detected: current %llu, native %llu\n", 105605027adcSTejun Heo (unsigned long long)sectors, 105705027adcSTejun Heo (unsigned long long)native_sectors); 105805027adcSTejun Heo else if (native_sectors < sectors) 105905027adcSTejun Heo ata_dev_printk(dev, KERN_WARNING, 106005027adcSTejun Heo "native sectors (%llu) is smaller than " 106105027adcSTejun Heo "sectors (%llu)\n", 106205027adcSTejun Heo (unsigned long long)native_sectors, 106305027adcSTejun Heo (unsigned long long)sectors); 106405027adcSTejun Heo return 0; 10651e999736SAlan Cox } 106637301a55STejun Heo 106705027adcSTejun Heo /* let's unlock HPA */ 106805027adcSTejun Heo rc = ata_set_max_sectors(dev, native_sectors); 106905027adcSTejun Heo if (rc == -EACCES) { 107005027adcSTejun Heo /* if device aborted the command, skip HPA resizing */ 107105027adcSTejun Heo ata_dev_printk(dev, KERN_WARNING, "device aborted resize " 107205027adcSTejun Heo "(%llu -> %llu), skipping HPA handling\n", 107305027adcSTejun Heo (unsigned long long)sectors, 107405027adcSTejun Heo (unsigned long long)native_sectors); 107505027adcSTejun Heo dev->horkage |= ATA_HORKAGE_BROKEN_HPA; 107605027adcSTejun Heo return 0; 107705027adcSTejun Heo } else if (rc) 107805027adcSTejun Heo return rc; 107905027adcSTejun Heo 108005027adcSTejun Heo /* re-read IDENTIFY data */ 108105027adcSTejun Heo rc = ata_dev_reread_id(dev, 0); 108205027adcSTejun Heo if (rc) { 108305027adcSTejun Heo ata_dev_printk(dev, KERN_ERR, "failed to re-read IDENTIFY " 108405027adcSTejun Heo "data after HPA resizing\n"); 108505027adcSTejun Heo return rc; 108605027adcSTejun Heo } 108705027adcSTejun Heo 108805027adcSTejun Heo if (print_info) { 108905027adcSTejun Heo u64 new_sectors = ata_id_n_sectors(dev->id); 109005027adcSTejun Heo ata_dev_printk(dev, KERN_INFO, 109105027adcSTejun Heo "HPA unlocked: %llu -> %llu, native %llu\n", 109205027adcSTejun Heo (unsigned long long)sectors, 109305027adcSTejun Heo (unsigned long long)new_sectors, 109405027adcSTejun Heo (unsigned long long)native_sectors); 109505027adcSTejun Heo } 109605027adcSTejun Heo 109705027adcSTejun Heo return 0; 10981e999736SAlan Cox } 10991e999736SAlan Cox 1100c6fd2807SJeff Garzik /** 110110305f0fSAlan * ata_id_to_dma_mode - Identify DMA mode from id block 110210305f0fSAlan * @dev: device to identify 1103cc261267SRandy Dunlap * @unknown: mode to assume if we cannot tell 110410305f0fSAlan * 110510305f0fSAlan * Set up the timing values for the device based upon the identify 110610305f0fSAlan * reported values for the DMA mode. This function is used by drivers 110710305f0fSAlan * which rely upon firmware configured modes, but wish to report the 110810305f0fSAlan * mode correctly when possible. 110910305f0fSAlan * 111010305f0fSAlan * In addition we emit similarly formatted messages to the default 111110305f0fSAlan * ata_dev_set_mode handler, in order to provide consistency of 111210305f0fSAlan * presentation. 111310305f0fSAlan */ 111410305f0fSAlan 111510305f0fSAlan void ata_id_to_dma_mode(struct ata_device *dev, u8 unknown) 111610305f0fSAlan { 111710305f0fSAlan unsigned int mask; 111810305f0fSAlan u8 mode; 111910305f0fSAlan 112010305f0fSAlan /* Pack the DMA modes */ 112110305f0fSAlan mask = ((dev->id[63] >> 8) << ATA_SHIFT_MWDMA) & ATA_MASK_MWDMA; 112210305f0fSAlan if (dev->id[53] & 0x04) 112310305f0fSAlan mask |= ((dev->id[88] >> 8) << ATA_SHIFT_UDMA) & ATA_MASK_UDMA; 112410305f0fSAlan 112510305f0fSAlan /* Select the mode in use */ 112610305f0fSAlan mode = ata_xfer_mask2mode(mask); 112710305f0fSAlan 112810305f0fSAlan if (mode != 0) { 112910305f0fSAlan ata_dev_printk(dev, KERN_INFO, "configured for %s\n", 113010305f0fSAlan ata_mode_string(mask)); 113110305f0fSAlan } else { 113210305f0fSAlan /* SWDMA perhaps ? */ 113310305f0fSAlan mode = unknown; 113410305f0fSAlan ata_dev_printk(dev, KERN_INFO, "configured for DMA\n"); 113510305f0fSAlan } 113610305f0fSAlan 113710305f0fSAlan /* Configure the device reporting */ 113810305f0fSAlan dev->xfer_mode = mode; 113910305f0fSAlan dev->xfer_shift = ata_xfer_mode2shift(mode); 114010305f0fSAlan } 114110305f0fSAlan 114210305f0fSAlan /** 1143c6fd2807SJeff Garzik * ata_noop_dev_select - Select device 0/1 on ATA bus 1144c6fd2807SJeff Garzik * @ap: ATA channel to manipulate 1145c6fd2807SJeff Garzik * @device: ATA device (numbered from zero) to select 1146c6fd2807SJeff Garzik * 1147c6fd2807SJeff Garzik * This function performs no actual function. 1148c6fd2807SJeff Garzik * 1149c6fd2807SJeff Garzik * May be used as the dev_select() entry in ata_port_operations. 1150c6fd2807SJeff Garzik * 1151c6fd2807SJeff Garzik * LOCKING: 1152c6fd2807SJeff Garzik * caller. 1153c6fd2807SJeff Garzik */ 1154c6fd2807SJeff Garzik void ata_noop_dev_select (struct ata_port *ap, unsigned int device) 1155c6fd2807SJeff Garzik { 1156c6fd2807SJeff Garzik } 1157c6fd2807SJeff Garzik 1158c6fd2807SJeff Garzik 1159c6fd2807SJeff Garzik /** 1160c6fd2807SJeff Garzik * ata_std_dev_select - Select device 0/1 on ATA bus 1161c6fd2807SJeff Garzik * @ap: ATA channel to manipulate 1162c6fd2807SJeff Garzik * @device: ATA device (numbered from zero) to select 1163c6fd2807SJeff Garzik * 1164c6fd2807SJeff Garzik * Use the method defined in the ATA specification to 1165c6fd2807SJeff Garzik * make either device 0, or device 1, active on the 1166c6fd2807SJeff Garzik * ATA channel. Works with both PIO and MMIO. 1167c6fd2807SJeff Garzik * 1168c6fd2807SJeff Garzik * May be used as the dev_select() entry in ata_port_operations. 1169c6fd2807SJeff Garzik * 1170c6fd2807SJeff Garzik * LOCKING: 1171c6fd2807SJeff Garzik * caller. 1172c6fd2807SJeff Garzik */ 1173c6fd2807SJeff Garzik 1174c6fd2807SJeff Garzik void ata_std_dev_select (struct ata_port *ap, unsigned int device) 1175c6fd2807SJeff Garzik { 1176c6fd2807SJeff Garzik u8 tmp; 1177c6fd2807SJeff Garzik 1178c6fd2807SJeff Garzik if (device == 0) 1179c6fd2807SJeff Garzik tmp = ATA_DEVICE_OBS; 1180c6fd2807SJeff Garzik else 1181c6fd2807SJeff Garzik tmp = ATA_DEVICE_OBS | ATA_DEV1; 1182c6fd2807SJeff Garzik 11830d5ff566STejun Heo iowrite8(tmp, ap->ioaddr.device_addr); 1184c6fd2807SJeff Garzik ata_pause(ap); /* needed; also flushes, for mmio */ 1185c6fd2807SJeff Garzik } 1186c6fd2807SJeff Garzik 1187c6fd2807SJeff Garzik /** 1188c6fd2807SJeff Garzik * ata_dev_select - Select device 0/1 on ATA bus 1189c6fd2807SJeff Garzik * @ap: ATA channel to manipulate 1190c6fd2807SJeff Garzik * @device: ATA device (numbered from zero) to select 1191c6fd2807SJeff Garzik * @wait: non-zero to wait for Status register BSY bit to clear 1192c6fd2807SJeff Garzik * @can_sleep: non-zero if context allows sleeping 1193c6fd2807SJeff Garzik * 1194c6fd2807SJeff Garzik * Use the method defined in the ATA specification to 1195c6fd2807SJeff Garzik * make either device 0, or device 1, active on the 1196c6fd2807SJeff Garzik * ATA channel. 1197c6fd2807SJeff Garzik * 1198c6fd2807SJeff Garzik * This is a high-level version of ata_std_dev_select(), 1199c6fd2807SJeff Garzik * which additionally provides the services of inserting 1200c6fd2807SJeff Garzik * the proper pauses and status polling, where needed. 1201c6fd2807SJeff Garzik * 1202c6fd2807SJeff Garzik * LOCKING: 1203c6fd2807SJeff Garzik * caller. 1204c6fd2807SJeff Garzik */ 1205c6fd2807SJeff Garzik 1206c6fd2807SJeff Garzik void ata_dev_select(struct ata_port *ap, unsigned int device, 1207c6fd2807SJeff Garzik unsigned int wait, unsigned int can_sleep) 1208c6fd2807SJeff Garzik { 1209c6fd2807SJeff Garzik if (ata_msg_probe(ap)) 121044877b4eSTejun Heo ata_port_printk(ap, KERN_INFO, "ata_dev_select: ENTER, " 121144877b4eSTejun Heo "device %u, wait %u\n", device, wait); 1212c6fd2807SJeff Garzik 1213c6fd2807SJeff Garzik if (wait) 1214c6fd2807SJeff Garzik ata_wait_idle(ap); 1215c6fd2807SJeff Garzik 1216c6fd2807SJeff Garzik ap->ops->dev_select(ap, device); 1217c6fd2807SJeff Garzik 1218c6fd2807SJeff Garzik if (wait) { 12199af5c9c9STejun Heo if (can_sleep && ap->link.device[device].class == ATA_DEV_ATAPI) 1220c6fd2807SJeff Garzik msleep(150); 1221c6fd2807SJeff Garzik ata_wait_idle(ap); 1222c6fd2807SJeff Garzik } 1223c6fd2807SJeff Garzik } 1224c6fd2807SJeff Garzik 1225c6fd2807SJeff Garzik /** 1226c6fd2807SJeff Garzik * ata_dump_id - IDENTIFY DEVICE info debugging output 1227c6fd2807SJeff Garzik * @id: IDENTIFY DEVICE page to dump 1228c6fd2807SJeff Garzik * 1229c6fd2807SJeff Garzik * Dump selected 16-bit words from the given IDENTIFY DEVICE 1230c6fd2807SJeff Garzik * page. 1231c6fd2807SJeff Garzik * 1232c6fd2807SJeff Garzik * LOCKING: 1233c6fd2807SJeff Garzik * caller. 1234c6fd2807SJeff Garzik */ 1235c6fd2807SJeff Garzik 1236c6fd2807SJeff Garzik static inline void ata_dump_id(const u16 *id) 1237c6fd2807SJeff Garzik { 1238c6fd2807SJeff Garzik DPRINTK("49==0x%04x " 1239c6fd2807SJeff Garzik "53==0x%04x " 1240c6fd2807SJeff Garzik "63==0x%04x " 1241c6fd2807SJeff Garzik "64==0x%04x " 1242c6fd2807SJeff Garzik "75==0x%04x \n", 1243c6fd2807SJeff Garzik id[49], 1244c6fd2807SJeff Garzik id[53], 1245c6fd2807SJeff Garzik id[63], 1246c6fd2807SJeff Garzik id[64], 1247c6fd2807SJeff Garzik id[75]); 1248c6fd2807SJeff Garzik DPRINTK("80==0x%04x " 1249c6fd2807SJeff Garzik "81==0x%04x " 1250c6fd2807SJeff Garzik "82==0x%04x " 1251c6fd2807SJeff Garzik "83==0x%04x " 1252c6fd2807SJeff Garzik "84==0x%04x \n", 1253c6fd2807SJeff Garzik id[80], 1254c6fd2807SJeff Garzik id[81], 1255c6fd2807SJeff Garzik id[82], 1256c6fd2807SJeff Garzik id[83], 1257c6fd2807SJeff Garzik id[84]); 1258c6fd2807SJeff Garzik DPRINTK("88==0x%04x " 1259c6fd2807SJeff Garzik "93==0x%04x\n", 1260c6fd2807SJeff Garzik id[88], 1261c6fd2807SJeff Garzik id[93]); 1262c6fd2807SJeff Garzik } 1263c6fd2807SJeff Garzik 1264c6fd2807SJeff Garzik /** 1265c6fd2807SJeff Garzik * ata_id_xfermask - Compute xfermask from the given IDENTIFY data 1266c6fd2807SJeff Garzik * @id: IDENTIFY data to compute xfer mask from 1267c6fd2807SJeff Garzik * 1268c6fd2807SJeff Garzik * Compute the xfermask for this device. This is not as trivial 1269c6fd2807SJeff Garzik * as it seems if we must consider early devices correctly. 1270c6fd2807SJeff Garzik * 1271c6fd2807SJeff Garzik * FIXME: pre IDE drive timing (do we care ?). 1272c6fd2807SJeff Garzik * 1273c6fd2807SJeff Garzik * LOCKING: 1274c6fd2807SJeff Garzik * None. 1275c6fd2807SJeff Garzik * 1276c6fd2807SJeff Garzik * RETURNS: 1277c6fd2807SJeff Garzik * Computed xfermask 1278c6fd2807SJeff Garzik */ 1279c6fd2807SJeff Garzik static unsigned int ata_id_xfermask(const u16 *id) 1280c6fd2807SJeff Garzik { 1281c6fd2807SJeff Garzik unsigned int pio_mask, mwdma_mask, udma_mask; 1282c6fd2807SJeff Garzik 1283c6fd2807SJeff Garzik /* Usual case. Word 53 indicates word 64 is valid */ 1284c6fd2807SJeff Garzik if (id[ATA_ID_FIELD_VALID] & (1 << 1)) { 1285c6fd2807SJeff Garzik pio_mask = id[ATA_ID_PIO_MODES] & 0x03; 1286c6fd2807SJeff Garzik pio_mask <<= 3; 1287c6fd2807SJeff Garzik pio_mask |= 0x7; 1288c6fd2807SJeff Garzik } else { 1289c6fd2807SJeff Garzik /* If word 64 isn't valid then Word 51 high byte holds 1290c6fd2807SJeff Garzik * the PIO timing number for the maximum. Turn it into 1291c6fd2807SJeff Garzik * a mask. 1292c6fd2807SJeff Garzik */ 12937a0f1c8aSLennert Buytenhek u8 mode = (id[ATA_ID_OLD_PIO_MODES] >> 8) & 0xFF; 129446767aebSAlan Cox if (mode < 5) /* Valid PIO range */ 129546767aebSAlan Cox pio_mask = (2 << mode) - 1; 129646767aebSAlan Cox else 129746767aebSAlan Cox pio_mask = 1; 1298c6fd2807SJeff Garzik 1299c6fd2807SJeff Garzik /* But wait.. there's more. Design your standards by 1300c6fd2807SJeff Garzik * committee and you too can get a free iordy field to 1301c6fd2807SJeff Garzik * process. However its the speeds not the modes that 1302c6fd2807SJeff Garzik * are supported... Note drivers using the timing API 1303c6fd2807SJeff Garzik * will get this right anyway 1304c6fd2807SJeff Garzik */ 1305c6fd2807SJeff Garzik } 1306c6fd2807SJeff Garzik 1307c6fd2807SJeff Garzik mwdma_mask = id[ATA_ID_MWDMA_MODES] & 0x07; 1308c6fd2807SJeff Garzik 1309b352e57dSAlan Cox if (ata_id_is_cfa(id)) { 1310b352e57dSAlan Cox /* 1311b352e57dSAlan Cox * Process compact flash extended modes 1312b352e57dSAlan Cox */ 1313b352e57dSAlan Cox int pio = id[163] & 0x7; 1314b352e57dSAlan Cox int dma = (id[163] >> 3) & 7; 1315b352e57dSAlan Cox 1316b352e57dSAlan Cox if (pio) 1317b352e57dSAlan Cox pio_mask |= (1 << 5); 1318b352e57dSAlan Cox if (pio > 1) 1319b352e57dSAlan Cox pio_mask |= (1 << 6); 1320b352e57dSAlan Cox if (dma) 1321b352e57dSAlan Cox mwdma_mask |= (1 << 3); 1322b352e57dSAlan Cox if (dma > 1) 1323b352e57dSAlan Cox mwdma_mask |= (1 << 4); 1324b352e57dSAlan Cox } 1325b352e57dSAlan Cox 1326c6fd2807SJeff Garzik udma_mask = 0; 1327c6fd2807SJeff Garzik if (id[ATA_ID_FIELD_VALID] & (1 << 2)) 1328c6fd2807SJeff Garzik udma_mask = id[ATA_ID_UDMA_MODES] & 0xff; 1329c6fd2807SJeff Garzik 1330c6fd2807SJeff Garzik return ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask); 1331c6fd2807SJeff Garzik } 1332c6fd2807SJeff Garzik 1333c6fd2807SJeff Garzik /** 1334c6fd2807SJeff Garzik * ata_port_queue_task - Queue port_task 1335c6fd2807SJeff Garzik * @ap: The ata_port to queue port_task for 1336c6fd2807SJeff Garzik * @fn: workqueue function to be scheduled 133765f27f38SDavid Howells * @data: data for @fn to use 1338c6fd2807SJeff Garzik * @delay: delay time for workqueue function 1339c6fd2807SJeff Garzik * 1340c6fd2807SJeff Garzik * Schedule @fn(@data) for execution after @delay jiffies using 1341c6fd2807SJeff Garzik * port_task. There is one port_task per port and it's the 1342c6fd2807SJeff Garzik * user(low level driver)'s responsibility to make sure that only 1343c6fd2807SJeff Garzik * one task is active at any given time. 1344c6fd2807SJeff Garzik * 1345c6fd2807SJeff Garzik * libata core layer takes care of synchronization between 1346c6fd2807SJeff Garzik * port_task and EH. ata_port_queue_task() may be ignored for EH 1347c6fd2807SJeff Garzik * synchronization. 1348c6fd2807SJeff Garzik * 1349c6fd2807SJeff Garzik * LOCKING: 1350c6fd2807SJeff Garzik * Inherited from caller. 1351c6fd2807SJeff Garzik */ 135265f27f38SDavid Howells void ata_port_queue_task(struct ata_port *ap, work_func_t fn, void *data, 1353c6fd2807SJeff Garzik unsigned long delay) 1354c6fd2807SJeff Garzik { 135565f27f38SDavid Howells PREPARE_DELAYED_WORK(&ap->port_task, fn); 135665f27f38SDavid Howells ap->port_task_data = data; 1357c6fd2807SJeff Garzik 135845a66c1cSOleg Nesterov /* may fail if ata_port_flush_task() in progress */ 135945a66c1cSOleg Nesterov queue_delayed_work(ata_wq, &ap->port_task, delay); 1360c6fd2807SJeff Garzik } 1361c6fd2807SJeff Garzik 1362c6fd2807SJeff Garzik /** 1363c6fd2807SJeff Garzik * ata_port_flush_task - Flush port_task 1364c6fd2807SJeff Garzik * @ap: The ata_port to flush port_task for 1365c6fd2807SJeff Garzik * 1366c6fd2807SJeff Garzik * After this function completes, port_task is guranteed not to 1367c6fd2807SJeff Garzik * be running or scheduled. 1368c6fd2807SJeff Garzik * 1369c6fd2807SJeff Garzik * LOCKING: 1370c6fd2807SJeff Garzik * Kernel thread context (may sleep) 1371c6fd2807SJeff Garzik */ 1372c6fd2807SJeff Garzik void ata_port_flush_task(struct ata_port *ap) 1373c6fd2807SJeff Garzik { 1374c6fd2807SJeff Garzik DPRINTK("ENTER\n"); 1375c6fd2807SJeff Garzik 137645a66c1cSOleg Nesterov cancel_rearming_delayed_work(&ap->port_task); 1377c6fd2807SJeff Garzik 1378c6fd2807SJeff Garzik if (ata_msg_ctl(ap)) 1379c6fd2807SJeff Garzik ata_port_printk(ap, KERN_DEBUG, "%s: EXIT\n", __FUNCTION__); 1380c6fd2807SJeff Garzik } 1381c6fd2807SJeff Garzik 13827102d230SAdrian Bunk static void ata_qc_complete_internal(struct ata_queued_cmd *qc) 1383c6fd2807SJeff Garzik { 1384c6fd2807SJeff Garzik struct completion *waiting = qc->private_data; 1385c6fd2807SJeff Garzik 1386c6fd2807SJeff Garzik complete(waiting); 1387c6fd2807SJeff Garzik } 1388c6fd2807SJeff Garzik 1389c6fd2807SJeff Garzik /** 13902432697bSTejun Heo * ata_exec_internal_sg - execute libata internal command 1391c6fd2807SJeff Garzik * @dev: Device to which the command is sent 1392c6fd2807SJeff Garzik * @tf: Taskfile registers for the command and the result 1393c6fd2807SJeff Garzik * @cdb: CDB for packet command 1394c6fd2807SJeff Garzik * @dma_dir: Data tranfer direction of the command 13952432697bSTejun Heo * @sg: sg list for the data buffer of the command 13962432697bSTejun Heo * @n_elem: Number of sg entries 1397c6fd2807SJeff Garzik * 1398c6fd2807SJeff Garzik * Executes libata internal command with timeout. @tf contains 1399c6fd2807SJeff Garzik * command on entry and result on return. Timeout and error 1400c6fd2807SJeff Garzik * conditions are reported via return value. No recovery action 1401c6fd2807SJeff Garzik * is taken after a command times out. It's caller's duty to 1402c6fd2807SJeff Garzik * clean up after timeout. 1403c6fd2807SJeff Garzik * 1404c6fd2807SJeff Garzik * LOCKING: 1405c6fd2807SJeff Garzik * None. Should be called with kernel context, might sleep. 1406c6fd2807SJeff Garzik * 1407c6fd2807SJeff Garzik * RETURNS: 1408c6fd2807SJeff Garzik * Zero on success, AC_ERR_* mask on failure 1409c6fd2807SJeff Garzik */ 14102432697bSTejun Heo unsigned ata_exec_internal_sg(struct ata_device *dev, 1411c6fd2807SJeff Garzik struct ata_taskfile *tf, const u8 *cdb, 14122432697bSTejun Heo int dma_dir, struct scatterlist *sg, 14132432697bSTejun Heo unsigned int n_elem) 1414c6fd2807SJeff Garzik { 14159af5c9c9STejun Heo struct ata_link *link = dev->link; 14169af5c9c9STejun Heo struct ata_port *ap = link->ap; 1417c6fd2807SJeff Garzik u8 command = tf->command; 1418c6fd2807SJeff Garzik struct ata_queued_cmd *qc; 1419c6fd2807SJeff Garzik unsigned int tag, preempted_tag; 1420c6fd2807SJeff Garzik u32 preempted_sactive, preempted_qc_active; 1421da917d69STejun Heo int preempted_nr_active_links; 1422c6fd2807SJeff Garzik DECLARE_COMPLETION_ONSTACK(wait); 1423c6fd2807SJeff Garzik unsigned long flags; 1424c6fd2807SJeff Garzik unsigned int err_mask; 1425c6fd2807SJeff Garzik int rc; 1426c6fd2807SJeff Garzik 1427c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 1428c6fd2807SJeff Garzik 1429c6fd2807SJeff Garzik /* no internal command while frozen */ 1430c6fd2807SJeff Garzik if (ap->pflags & ATA_PFLAG_FROZEN) { 1431c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 1432c6fd2807SJeff Garzik return AC_ERR_SYSTEM; 1433c6fd2807SJeff Garzik } 1434c6fd2807SJeff Garzik 1435c6fd2807SJeff Garzik /* initialize internal qc */ 1436c6fd2807SJeff Garzik 1437c6fd2807SJeff Garzik /* XXX: Tag 0 is used for drivers with legacy EH as some 1438c6fd2807SJeff Garzik * drivers choke if any other tag is given. This breaks 1439c6fd2807SJeff Garzik * ata_tag_internal() test for those drivers. Don't use new 1440c6fd2807SJeff Garzik * EH stuff without converting to it. 1441c6fd2807SJeff Garzik */ 1442c6fd2807SJeff Garzik if (ap->ops->error_handler) 1443c6fd2807SJeff Garzik tag = ATA_TAG_INTERNAL; 1444c6fd2807SJeff Garzik else 1445c6fd2807SJeff Garzik tag = 0; 1446c6fd2807SJeff Garzik 1447c6fd2807SJeff Garzik if (test_and_set_bit(tag, &ap->qc_allocated)) 1448c6fd2807SJeff Garzik BUG(); 1449c6fd2807SJeff Garzik qc = __ata_qc_from_tag(ap, tag); 1450c6fd2807SJeff Garzik 1451c6fd2807SJeff Garzik qc->tag = tag; 1452c6fd2807SJeff Garzik qc->scsicmd = NULL; 1453c6fd2807SJeff Garzik qc->ap = ap; 1454c6fd2807SJeff Garzik qc->dev = dev; 1455c6fd2807SJeff Garzik ata_qc_reinit(qc); 1456c6fd2807SJeff Garzik 14579af5c9c9STejun Heo preempted_tag = link->active_tag; 14589af5c9c9STejun Heo preempted_sactive = link->sactive; 1459c6fd2807SJeff Garzik preempted_qc_active = ap->qc_active; 1460da917d69STejun Heo preempted_nr_active_links = ap->nr_active_links; 14619af5c9c9STejun Heo link->active_tag = ATA_TAG_POISON; 14629af5c9c9STejun Heo link->sactive = 0; 1463c6fd2807SJeff Garzik ap->qc_active = 0; 1464da917d69STejun Heo ap->nr_active_links = 0; 1465c6fd2807SJeff Garzik 1466c6fd2807SJeff Garzik /* prepare & issue qc */ 1467c6fd2807SJeff Garzik qc->tf = *tf; 1468c6fd2807SJeff Garzik if (cdb) 1469c6fd2807SJeff Garzik memcpy(qc->cdb, cdb, ATAPI_CDB_LEN); 1470c6fd2807SJeff Garzik qc->flags |= ATA_QCFLAG_RESULT_TF; 1471c6fd2807SJeff Garzik qc->dma_dir = dma_dir; 1472c6fd2807SJeff Garzik if (dma_dir != DMA_NONE) { 14732432697bSTejun Heo unsigned int i, buflen = 0; 14742432697bSTejun Heo 14752432697bSTejun Heo for (i = 0; i < n_elem; i++) 14762432697bSTejun Heo buflen += sg[i].length; 14772432697bSTejun Heo 14782432697bSTejun Heo ata_sg_init(qc, sg, n_elem); 147949c80429SBrian King qc->nbytes = buflen; 1480c6fd2807SJeff Garzik } 1481c6fd2807SJeff Garzik 1482c6fd2807SJeff Garzik qc->private_data = &wait; 1483c6fd2807SJeff Garzik qc->complete_fn = ata_qc_complete_internal; 1484c6fd2807SJeff Garzik 1485c6fd2807SJeff Garzik ata_qc_issue(qc); 1486c6fd2807SJeff Garzik 1487c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 1488c6fd2807SJeff Garzik 1489c6fd2807SJeff Garzik rc = wait_for_completion_timeout(&wait, ata_probe_timeout); 1490c6fd2807SJeff Garzik 1491c6fd2807SJeff Garzik ata_port_flush_task(ap); 1492c6fd2807SJeff Garzik 1493c6fd2807SJeff Garzik if (!rc) { 1494c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 1495c6fd2807SJeff Garzik 1496c6fd2807SJeff Garzik /* We're racing with irq here. If we lose, the 1497c6fd2807SJeff Garzik * following test prevents us from completing the qc 1498c6fd2807SJeff Garzik * twice. If we win, the port is frozen and will be 1499c6fd2807SJeff Garzik * cleaned up by ->post_internal_cmd(). 1500c6fd2807SJeff Garzik */ 1501c6fd2807SJeff Garzik if (qc->flags & ATA_QCFLAG_ACTIVE) { 1502c6fd2807SJeff Garzik qc->err_mask |= AC_ERR_TIMEOUT; 1503c6fd2807SJeff Garzik 1504c6fd2807SJeff Garzik if (ap->ops->error_handler) 1505c6fd2807SJeff Garzik ata_port_freeze(ap); 1506c6fd2807SJeff Garzik else 1507c6fd2807SJeff Garzik ata_qc_complete(qc); 1508c6fd2807SJeff Garzik 1509c6fd2807SJeff Garzik if (ata_msg_warn(ap)) 1510c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_WARNING, 1511c6fd2807SJeff Garzik "qc timeout (cmd 0x%x)\n", command); 1512c6fd2807SJeff Garzik } 1513c6fd2807SJeff Garzik 1514c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 1515c6fd2807SJeff Garzik } 1516c6fd2807SJeff Garzik 1517c6fd2807SJeff Garzik /* do post_internal_cmd */ 1518c6fd2807SJeff Garzik if (ap->ops->post_internal_cmd) 1519c6fd2807SJeff Garzik ap->ops->post_internal_cmd(qc); 1520c6fd2807SJeff Garzik 1521a51d644aSTejun Heo /* perform minimal error analysis */ 1522a51d644aSTejun Heo if (qc->flags & ATA_QCFLAG_FAILED) { 1523a51d644aSTejun Heo if (qc->result_tf.command & (ATA_ERR | ATA_DF)) 1524a51d644aSTejun Heo qc->err_mask |= AC_ERR_DEV; 1525a51d644aSTejun Heo 1526a51d644aSTejun Heo if (!qc->err_mask) 1527c6fd2807SJeff Garzik qc->err_mask |= AC_ERR_OTHER; 1528a51d644aSTejun Heo 1529a51d644aSTejun Heo if (qc->err_mask & ~AC_ERR_OTHER) 1530a51d644aSTejun Heo qc->err_mask &= ~AC_ERR_OTHER; 1531c6fd2807SJeff Garzik } 1532c6fd2807SJeff Garzik 1533c6fd2807SJeff Garzik /* finish up */ 1534c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 1535c6fd2807SJeff Garzik 1536c6fd2807SJeff Garzik *tf = qc->result_tf; 1537c6fd2807SJeff Garzik err_mask = qc->err_mask; 1538c6fd2807SJeff Garzik 1539c6fd2807SJeff Garzik ata_qc_free(qc); 15409af5c9c9STejun Heo link->active_tag = preempted_tag; 15419af5c9c9STejun Heo link->sactive = preempted_sactive; 1542c6fd2807SJeff Garzik ap->qc_active = preempted_qc_active; 1543da917d69STejun Heo ap->nr_active_links = preempted_nr_active_links; 1544c6fd2807SJeff Garzik 1545c6fd2807SJeff Garzik /* XXX - Some LLDDs (sata_mv) disable port on command failure. 1546c6fd2807SJeff Garzik * Until those drivers are fixed, we detect the condition 1547c6fd2807SJeff Garzik * here, fail the command with AC_ERR_SYSTEM and reenable the 1548c6fd2807SJeff Garzik * port. 1549c6fd2807SJeff Garzik * 1550c6fd2807SJeff Garzik * Note that this doesn't change any behavior as internal 1551c6fd2807SJeff Garzik * command failure results in disabling the device in the 1552c6fd2807SJeff Garzik * higher layer for LLDDs without new reset/EH callbacks. 1553c6fd2807SJeff Garzik * 1554c6fd2807SJeff Garzik * Kill the following code as soon as those drivers are fixed. 1555c6fd2807SJeff Garzik */ 1556c6fd2807SJeff Garzik if (ap->flags & ATA_FLAG_DISABLED) { 1557c6fd2807SJeff Garzik err_mask |= AC_ERR_SYSTEM; 1558c6fd2807SJeff Garzik ata_port_probe(ap); 1559c6fd2807SJeff Garzik } 1560c6fd2807SJeff Garzik 1561c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 1562c6fd2807SJeff Garzik 1563c6fd2807SJeff Garzik return err_mask; 1564c6fd2807SJeff Garzik } 1565c6fd2807SJeff Garzik 1566c6fd2807SJeff Garzik /** 156733480a0eSTejun Heo * ata_exec_internal - execute libata internal command 15682432697bSTejun Heo * @dev: Device to which the command is sent 15692432697bSTejun Heo * @tf: Taskfile registers for the command and the result 15702432697bSTejun Heo * @cdb: CDB for packet command 15712432697bSTejun Heo * @dma_dir: Data tranfer direction of the command 15722432697bSTejun Heo * @buf: Data buffer of the command 15732432697bSTejun Heo * @buflen: Length of data buffer 15742432697bSTejun Heo * 15752432697bSTejun Heo * Wrapper around ata_exec_internal_sg() which takes simple 15762432697bSTejun Heo * buffer instead of sg list. 15772432697bSTejun Heo * 15782432697bSTejun Heo * LOCKING: 15792432697bSTejun Heo * None. Should be called with kernel context, might sleep. 15802432697bSTejun Heo * 15812432697bSTejun Heo * RETURNS: 15822432697bSTejun Heo * Zero on success, AC_ERR_* mask on failure 15832432697bSTejun Heo */ 15842432697bSTejun Heo unsigned ata_exec_internal(struct ata_device *dev, 15852432697bSTejun Heo struct ata_taskfile *tf, const u8 *cdb, 15862432697bSTejun Heo int dma_dir, void *buf, unsigned int buflen) 15872432697bSTejun Heo { 158833480a0eSTejun Heo struct scatterlist *psg = NULL, sg; 158933480a0eSTejun Heo unsigned int n_elem = 0; 15902432697bSTejun Heo 159133480a0eSTejun Heo if (dma_dir != DMA_NONE) { 159233480a0eSTejun Heo WARN_ON(!buf); 15932432697bSTejun Heo sg_init_one(&sg, buf, buflen); 159433480a0eSTejun Heo psg = &sg; 159533480a0eSTejun Heo n_elem++; 159633480a0eSTejun Heo } 15972432697bSTejun Heo 159833480a0eSTejun Heo return ata_exec_internal_sg(dev, tf, cdb, dma_dir, psg, n_elem); 15992432697bSTejun Heo } 16002432697bSTejun Heo 16012432697bSTejun Heo /** 1602c6fd2807SJeff Garzik * ata_do_simple_cmd - execute simple internal command 1603c6fd2807SJeff Garzik * @dev: Device to which the command is sent 1604c6fd2807SJeff Garzik * @cmd: Opcode to execute 1605c6fd2807SJeff Garzik * 1606c6fd2807SJeff Garzik * Execute a 'simple' command, that only consists of the opcode 1607c6fd2807SJeff Garzik * 'cmd' itself, without filling any other registers 1608c6fd2807SJeff Garzik * 1609c6fd2807SJeff Garzik * LOCKING: 1610c6fd2807SJeff Garzik * Kernel thread context (may sleep). 1611c6fd2807SJeff Garzik * 1612c6fd2807SJeff Garzik * RETURNS: 1613c6fd2807SJeff Garzik * Zero on success, AC_ERR_* mask on failure 1614c6fd2807SJeff Garzik */ 1615c6fd2807SJeff Garzik unsigned int ata_do_simple_cmd(struct ata_device *dev, u8 cmd) 1616c6fd2807SJeff Garzik { 1617c6fd2807SJeff Garzik struct ata_taskfile tf; 1618c6fd2807SJeff Garzik 1619c6fd2807SJeff Garzik ata_tf_init(dev, &tf); 1620c6fd2807SJeff Garzik 1621c6fd2807SJeff Garzik tf.command = cmd; 1622c6fd2807SJeff Garzik tf.flags |= ATA_TFLAG_DEVICE; 1623c6fd2807SJeff Garzik tf.protocol = ATA_PROT_NODATA; 1624c6fd2807SJeff Garzik 1625c6fd2807SJeff Garzik return ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0); 1626c6fd2807SJeff Garzik } 1627c6fd2807SJeff Garzik 1628c6fd2807SJeff Garzik /** 1629c6fd2807SJeff Garzik * ata_pio_need_iordy - check if iordy needed 1630c6fd2807SJeff Garzik * @adev: ATA device 1631c6fd2807SJeff Garzik * 1632c6fd2807SJeff Garzik * Check if the current speed of the device requires IORDY. Used 1633c6fd2807SJeff Garzik * by various controllers for chip configuration. 1634c6fd2807SJeff Garzik */ 1635c6fd2807SJeff Garzik 1636c6fd2807SJeff Garzik unsigned int ata_pio_need_iordy(const struct ata_device *adev) 1637c6fd2807SJeff Garzik { 1638432729f0SAlan Cox /* Controller doesn't support IORDY. Probably a pointless check 1639432729f0SAlan Cox as the caller should know this */ 16409af5c9c9STejun Heo if (adev->link->ap->flags & ATA_FLAG_NO_IORDY) 1641c6fd2807SJeff Garzik return 0; 1642432729f0SAlan Cox /* PIO3 and higher it is mandatory */ 1643432729f0SAlan Cox if (adev->pio_mode > XFER_PIO_2) 1644c6fd2807SJeff Garzik return 1; 1645432729f0SAlan Cox /* We turn it on when possible */ 1646432729f0SAlan Cox if (ata_id_has_iordy(adev->id)) 1647432729f0SAlan Cox return 1; 1648432729f0SAlan Cox return 0; 1649432729f0SAlan Cox } 1650c6fd2807SJeff Garzik 1651432729f0SAlan Cox /** 1652432729f0SAlan Cox * ata_pio_mask_no_iordy - Return the non IORDY mask 1653432729f0SAlan Cox * @adev: ATA device 1654432729f0SAlan Cox * 1655432729f0SAlan Cox * Compute the highest mode possible if we are not using iordy. Return 1656432729f0SAlan Cox * -1 if no iordy mode is available. 1657432729f0SAlan Cox */ 1658432729f0SAlan Cox 1659432729f0SAlan Cox static u32 ata_pio_mask_no_iordy(const struct ata_device *adev) 1660432729f0SAlan Cox { 1661c6fd2807SJeff Garzik /* If we have no drive specific rule, then PIO 2 is non IORDY */ 1662c6fd2807SJeff Garzik if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE */ 1663432729f0SAlan Cox u16 pio = adev->id[ATA_ID_EIDE_PIO]; 1664c6fd2807SJeff Garzik /* Is the speed faster than the drive allows non IORDY ? */ 1665c6fd2807SJeff Garzik if (pio) { 1666c6fd2807SJeff Garzik /* This is cycle times not frequency - watch the logic! */ 1667c6fd2807SJeff Garzik if (pio > 240) /* PIO2 is 240nS per cycle */ 1668432729f0SAlan Cox return 3 << ATA_SHIFT_PIO; 1669432729f0SAlan Cox return 7 << ATA_SHIFT_PIO; 1670c6fd2807SJeff Garzik } 1671c6fd2807SJeff Garzik } 1672432729f0SAlan Cox return 3 << ATA_SHIFT_PIO; 1673c6fd2807SJeff Garzik } 1674c6fd2807SJeff Garzik 1675c6fd2807SJeff Garzik /** 1676c6fd2807SJeff Garzik * ata_dev_read_id - Read ID data from the specified device 1677c6fd2807SJeff Garzik * @dev: target device 1678c6fd2807SJeff Garzik * @p_class: pointer to class of the target device (may be changed) 1679bff04647STejun Heo * @flags: ATA_READID_* flags 1680c6fd2807SJeff Garzik * @id: buffer to read IDENTIFY data into 1681c6fd2807SJeff Garzik * 1682c6fd2807SJeff Garzik * Read ID data from the specified device. ATA_CMD_ID_ATA is 1683c6fd2807SJeff Garzik * performed on ATA devices and ATA_CMD_ID_ATAPI on ATAPI 1684c6fd2807SJeff Garzik * devices. This function also issues ATA_CMD_INIT_DEV_PARAMS 1685c6fd2807SJeff Garzik * for pre-ATA4 drives. 1686c6fd2807SJeff Garzik * 168750a99018SAlan Cox * FIXME: ATA_CMD_ID_ATA is optional for early drives and right 168850a99018SAlan Cox * now we abort if we hit that case. 168950a99018SAlan Cox * 1690c6fd2807SJeff Garzik * LOCKING: 1691c6fd2807SJeff Garzik * Kernel thread context (may sleep) 1692c6fd2807SJeff Garzik * 1693c6fd2807SJeff Garzik * RETURNS: 1694c6fd2807SJeff Garzik * 0 on success, -errno otherwise. 1695c6fd2807SJeff Garzik */ 1696c6fd2807SJeff Garzik int ata_dev_read_id(struct ata_device *dev, unsigned int *p_class, 1697bff04647STejun Heo unsigned int flags, u16 *id) 1698c6fd2807SJeff Garzik { 16999af5c9c9STejun Heo struct ata_port *ap = dev->link->ap; 1700c6fd2807SJeff Garzik unsigned int class = *p_class; 1701c6fd2807SJeff Garzik struct ata_taskfile tf; 1702c6fd2807SJeff Garzik unsigned int err_mask = 0; 1703c6fd2807SJeff Garzik const char *reason; 170454936f8bSTejun Heo int may_fallback = 1, tried_spinup = 0; 1705c6fd2807SJeff Garzik int rc; 1706c6fd2807SJeff Garzik 1707c6fd2807SJeff Garzik if (ata_msg_ctl(ap)) 170844877b4eSTejun Heo ata_dev_printk(dev, KERN_DEBUG, "%s: ENTER\n", __FUNCTION__); 1709c6fd2807SJeff Garzik 1710c6fd2807SJeff Garzik ata_dev_select(ap, dev->devno, 1, 1); /* select device 0/1 */ 1711c6fd2807SJeff Garzik retry: 1712c6fd2807SJeff Garzik ata_tf_init(dev, &tf); 1713c6fd2807SJeff Garzik 1714c6fd2807SJeff Garzik switch (class) { 1715c6fd2807SJeff Garzik case ATA_DEV_ATA: 1716c6fd2807SJeff Garzik tf.command = ATA_CMD_ID_ATA; 1717c6fd2807SJeff Garzik break; 1718c6fd2807SJeff Garzik case ATA_DEV_ATAPI: 1719c6fd2807SJeff Garzik tf.command = ATA_CMD_ID_ATAPI; 1720c6fd2807SJeff Garzik break; 1721c6fd2807SJeff Garzik default: 1722c6fd2807SJeff Garzik rc = -ENODEV; 1723c6fd2807SJeff Garzik reason = "unsupported class"; 1724c6fd2807SJeff Garzik goto err_out; 1725c6fd2807SJeff Garzik } 1726c6fd2807SJeff Garzik 1727c6fd2807SJeff Garzik tf.protocol = ATA_PROT_PIO; 172881afe893STejun Heo 172981afe893STejun Heo /* Some devices choke if TF registers contain garbage. Make 173081afe893STejun Heo * sure those are properly initialized. 173181afe893STejun Heo */ 173281afe893STejun Heo tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 173381afe893STejun Heo 173481afe893STejun Heo /* Device presence detection is unreliable on some 173581afe893STejun Heo * controllers. Always poll IDENTIFY if available. 173681afe893STejun Heo */ 173781afe893STejun Heo tf.flags |= ATA_TFLAG_POLLING; 1738c6fd2807SJeff Garzik 1739c6fd2807SJeff Garzik err_mask = ata_exec_internal(dev, &tf, NULL, DMA_FROM_DEVICE, 1740c6fd2807SJeff Garzik id, sizeof(id[0]) * ATA_ID_WORDS); 1741c6fd2807SJeff Garzik if (err_mask) { 1742800b3996STejun Heo if (err_mask & AC_ERR_NODEV_HINT) { 174355a8e2c8STejun Heo DPRINTK("ata%u.%d: NODEV after polling detection\n", 174444877b4eSTejun Heo ap->print_id, dev->devno); 174555a8e2c8STejun Heo return -ENOENT; 174655a8e2c8STejun Heo } 174755a8e2c8STejun Heo 174854936f8bSTejun Heo /* Device or controller might have reported the wrong 174954936f8bSTejun Heo * device class. Give a shot at the other IDENTIFY if 175054936f8bSTejun Heo * the current one is aborted by the device. 175154936f8bSTejun Heo */ 175254936f8bSTejun Heo if (may_fallback && 175354936f8bSTejun Heo (err_mask == AC_ERR_DEV) && (tf.feature & ATA_ABORTED)) { 175454936f8bSTejun Heo may_fallback = 0; 175554936f8bSTejun Heo 175654936f8bSTejun Heo if (class == ATA_DEV_ATA) 175754936f8bSTejun Heo class = ATA_DEV_ATAPI; 175854936f8bSTejun Heo else 175954936f8bSTejun Heo class = ATA_DEV_ATA; 176054936f8bSTejun Heo goto retry; 176154936f8bSTejun Heo } 176254936f8bSTejun Heo 1763c6fd2807SJeff Garzik rc = -EIO; 1764c6fd2807SJeff Garzik reason = "I/O error"; 1765c6fd2807SJeff Garzik goto err_out; 1766c6fd2807SJeff Garzik } 1767c6fd2807SJeff Garzik 176854936f8bSTejun Heo /* Falling back doesn't make sense if ID data was read 176954936f8bSTejun Heo * successfully at least once. 177054936f8bSTejun Heo */ 177154936f8bSTejun Heo may_fallback = 0; 177254936f8bSTejun Heo 1773c6fd2807SJeff Garzik swap_buf_le16(id, ATA_ID_WORDS); 1774c6fd2807SJeff Garzik 1775c6fd2807SJeff Garzik /* sanity check */ 1776c6fd2807SJeff Garzik rc = -EINVAL; 17776070068bSAlan Cox reason = "device reports invalid type"; 17784a3381feSJeff Garzik 17794a3381feSJeff Garzik if (class == ATA_DEV_ATA) { 17804a3381feSJeff Garzik if (!ata_id_is_ata(id) && !ata_id_is_cfa(id)) 17814a3381feSJeff Garzik goto err_out; 17824a3381feSJeff Garzik } else { 17834a3381feSJeff Garzik if (ata_id_is_ata(id)) 1784c6fd2807SJeff Garzik goto err_out; 1785c6fd2807SJeff Garzik } 1786c6fd2807SJeff Garzik 1787169439c2SMark Lord if (!tried_spinup && (id[2] == 0x37c8 || id[2] == 0x738c)) { 1788169439c2SMark Lord tried_spinup = 1; 1789169439c2SMark Lord /* 1790169439c2SMark Lord * Drive powered-up in standby mode, and requires a specific 1791169439c2SMark Lord * SET_FEATURES spin-up subcommand before it will accept 1792169439c2SMark Lord * anything other than the original IDENTIFY command. 1793169439c2SMark Lord */ 1794169439c2SMark Lord ata_tf_init(dev, &tf); 1795169439c2SMark Lord tf.command = ATA_CMD_SET_FEATURES; 1796169439c2SMark Lord tf.feature = SETFEATURES_SPINUP; 1797169439c2SMark Lord tf.protocol = ATA_PROT_NODATA; 1798169439c2SMark Lord tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 1799169439c2SMark Lord err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0); 1800fb0582f9SRyan Power if (err_mask && id[2] != 0x738c) { 1801169439c2SMark Lord rc = -EIO; 1802169439c2SMark Lord reason = "SPINUP failed"; 1803169439c2SMark Lord goto err_out; 1804169439c2SMark Lord } 1805169439c2SMark Lord /* 1806169439c2SMark Lord * If the drive initially returned incomplete IDENTIFY info, 1807169439c2SMark Lord * we now must reissue the IDENTIFY command. 1808169439c2SMark Lord */ 1809169439c2SMark Lord if (id[2] == 0x37c8) 1810169439c2SMark Lord goto retry; 1811169439c2SMark Lord } 1812169439c2SMark Lord 1813bff04647STejun Heo if ((flags & ATA_READID_POSTRESET) && class == ATA_DEV_ATA) { 1814c6fd2807SJeff Garzik /* 1815c6fd2807SJeff Garzik * The exact sequence expected by certain pre-ATA4 drives is: 1816c6fd2807SJeff Garzik * SRST RESET 181750a99018SAlan Cox * IDENTIFY (optional in early ATA) 181850a99018SAlan Cox * INITIALIZE DEVICE PARAMETERS (later IDE and ATA) 1819c6fd2807SJeff Garzik * anything else.. 1820c6fd2807SJeff Garzik * Some drives were very specific about that exact sequence. 182150a99018SAlan Cox * 182250a99018SAlan Cox * Note that ATA4 says lba is mandatory so the second check 182350a99018SAlan Cox * shoud never trigger. 1824c6fd2807SJeff Garzik */ 1825c6fd2807SJeff Garzik if (ata_id_major_version(id) < 4 || !ata_id_has_lba(id)) { 1826c6fd2807SJeff Garzik err_mask = ata_dev_init_params(dev, id[3], id[6]); 1827c6fd2807SJeff Garzik if (err_mask) { 1828c6fd2807SJeff Garzik rc = -EIO; 1829c6fd2807SJeff Garzik reason = "INIT_DEV_PARAMS failed"; 1830c6fd2807SJeff Garzik goto err_out; 1831c6fd2807SJeff Garzik } 1832c6fd2807SJeff Garzik 1833c6fd2807SJeff Garzik /* current CHS translation info (id[53-58]) might be 1834c6fd2807SJeff Garzik * changed. reread the identify device info. 1835c6fd2807SJeff Garzik */ 1836bff04647STejun Heo flags &= ~ATA_READID_POSTRESET; 1837c6fd2807SJeff Garzik goto retry; 1838c6fd2807SJeff Garzik } 1839c6fd2807SJeff Garzik } 1840c6fd2807SJeff Garzik 1841c6fd2807SJeff Garzik *p_class = class; 1842c6fd2807SJeff Garzik 1843c6fd2807SJeff Garzik return 0; 1844c6fd2807SJeff Garzik 1845c6fd2807SJeff Garzik err_out: 1846c6fd2807SJeff Garzik if (ata_msg_warn(ap)) 1847c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_WARNING, "failed to IDENTIFY " 1848c6fd2807SJeff Garzik "(%s, err_mask=0x%x)\n", reason, err_mask); 1849c6fd2807SJeff Garzik return rc; 1850c6fd2807SJeff Garzik } 1851c6fd2807SJeff Garzik 1852c6fd2807SJeff Garzik static inline u8 ata_dev_knobble(struct ata_device *dev) 1853c6fd2807SJeff Garzik { 18549af5c9c9STejun Heo struct ata_port *ap = dev->link->ap; 18559af5c9c9STejun Heo return ((ap->cbl == ATA_CBL_SATA) && (!ata_id_is_sata(dev->id))); 1856c6fd2807SJeff Garzik } 1857c6fd2807SJeff Garzik 1858c6fd2807SJeff Garzik static void ata_dev_config_ncq(struct ata_device *dev, 1859c6fd2807SJeff Garzik char *desc, size_t desc_sz) 1860c6fd2807SJeff Garzik { 18619af5c9c9STejun Heo struct ata_port *ap = dev->link->ap; 1862c6fd2807SJeff Garzik int hdepth = 0, ddepth = ata_id_queue_depth(dev->id); 1863c6fd2807SJeff Garzik 1864c6fd2807SJeff Garzik if (!ata_id_has_ncq(dev->id)) { 1865c6fd2807SJeff Garzik desc[0] = '\0'; 1866c6fd2807SJeff Garzik return; 1867c6fd2807SJeff Garzik } 186875683fe7STejun Heo if (dev->horkage & ATA_HORKAGE_NONCQ) { 18696919a0a6SAlan Cox snprintf(desc, desc_sz, "NCQ (not used)"); 18706919a0a6SAlan Cox return; 18716919a0a6SAlan Cox } 1872c6fd2807SJeff Garzik if (ap->flags & ATA_FLAG_NCQ) { 1873cca3974eSJeff Garzik hdepth = min(ap->scsi_host->can_queue, ATA_MAX_QUEUE - 1); 1874c6fd2807SJeff Garzik dev->flags |= ATA_DFLAG_NCQ; 1875c6fd2807SJeff Garzik } 1876c6fd2807SJeff Garzik 1877c6fd2807SJeff Garzik if (hdepth >= ddepth) 1878c6fd2807SJeff Garzik snprintf(desc, desc_sz, "NCQ (depth %d)", ddepth); 1879c6fd2807SJeff Garzik else 1880c6fd2807SJeff Garzik snprintf(desc, desc_sz, "NCQ (depth %d/%d)", hdepth, ddepth); 1881c6fd2807SJeff Garzik } 1882c6fd2807SJeff Garzik 1883c6fd2807SJeff Garzik /** 1884c6fd2807SJeff Garzik * ata_dev_configure - Configure the specified ATA/ATAPI device 1885c6fd2807SJeff Garzik * @dev: Target device to configure 1886c6fd2807SJeff Garzik * 1887c6fd2807SJeff Garzik * Configure @dev according to @dev->id. Generic and low-level 1888c6fd2807SJeff Garzik * driver specific fixups are also applied. 1889c6fd2807SJeff Garzik * 1890c6fd2807SJeff Garzik * LOCKING: 1891c6fd2807SJeff Garzik * Kernel thread context (may sleep) 1892c6fd2807SJeff Garzik * 1893c6fd2807SJeff Garzik * RETURNS: 1894c6fd2807SJeff Garzik * 0 on success, -errno otherwise 1895c6fd2807SJeff Garzik */ 1896efdaedc4STejun Heo int ata_dev_configure(struct ata_device *dev) 1897c6fd2807SJeff Garzik { 18989af5c9c9STejun Heo struct ata_port *ap = dev->link->ap; 18999af5c9c9STejun Heo struct ata_eh_context *ehc = &dev->link->eh_context; 19006746544cSTejun Heo int print_info = ehc->i.flags & ATA_EHI_PRINTINFO; 1901c6fd2807SJeff Garzik const u16 *id = dev->id; 1902c6fd2807SJeff Garzik unsigned int xfer_mask; 1903b352e57dSAlan Cox char revbuf[7]; /* XYZ-99\0 */ 19043f64f565SEric D. Mudama char fwrevbuf[ATA_ID_FW_REV_LEN+1]; 19053f64f565SEric D. Mudama char modelbuf[ATA_ID_PROD_LEN+1]; 1906c6fd2807SJeff Garzik int rc; 1907c6fd2807SJeff Garzik 1908c6fd2807SJeff Garzik if (!ata_dev_enabled(dev) && ata_msg_info(ap)) { 190944877b4eSTejun Heo ata_dev_printk(dev, KERN_INFO, "%s: ENTER/EXIT -- nodev\n", 191044877b4eSTejun Heo __FUNCTION__); 1911c6fd2807SJeff Garzik return 0; 1912c6fd2807SJeff Garzik } 1913c6fd2807SJeff Garzik 1914c6fd2807SJeff Garzik if (ata_msg_probe(ap)) 191544877b4eSTejun Heo ata_dev_printk(dev, KERN_DEBUG, "%s: ENTER\n", __FUNCTION__); 1916c6fd2807SJeff Garzik 191775683fe7STejun Heo /* set horkage */ 191875683fe7STejun Heo dev->horkage |= ata_dev_blacklisted(dev); 191975683fe7STejun Heo 19206746544cSTejun Heo /* let ACPI work its magic */ 19216746544cSTejun Heo rc = ata_acpi_on_devcfg(dev); 19226746544cSTejun Heo if (rc) 19236746544cSTejun Heo return rc; 192408573a86SKristen Carlson Accardi 192505027adcSTejun Heo /* massage HPA, do it early as it might change IDENTIFY data */ 192605027adcSTejun Heo rc = ata_hpa_resize(dev); 192705027adcSTejun Heo if (rc) 192805027adcSTejun Heo return rc; 192905027adcSTejun Heo 1930c6fd2807SJeff Garzik /* print device capabilities */ 1931c6fd2807SJeff Garzik if (ata_msg_probe(ap)) 1932c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_DEBUG, 1933c6fd2807SJeff Garzik "%s: cfg 49:%04x 82:%04x 83:%04x 84:%04x " 1934c6fd2807SJeff Garzik "85:%04x 86:%04x 87:%04x 88:%04x\n", 1935c6fd2807SJeff Garzik __FUNCTION__, 1936c6fd2807SJeff Garzik id[49], id[82], id[83], id[84], 1937c6fd2807SJeff Garzik id[85], id[86], id[87], id[88]); 1938c6fd2807SJeff Garzik 1939c6fd2807SJeff Garzik /* initialize to-be-configured parameters */ 1940c6fd2807SJeff Garzik dev->flags &= ~ATA_DFLAG_CFG_MASK; 1941c6fd2807SJeff Garzik dev->max_sectors = 0; 1942c6fd2807SJeff Garzik dev->cdb_len = 0; 1943c6fd2807SJeff Garzik dev->n_sectors = 0; 1944c6fd2807SJeff Garzik dev->cylinders = 0; 1945c6fd2807SJeff Garzik dev->heads = 0; 1946c6fd2807SJeff Garzik dev->sectors = 0; 1947c6fd2807SJeff Garzik 1948c6fd2807SJeff Garzik /* 1949c6fd2807SJeff Garzik * common ATA, ATAPI feature tests 1950c6fd2807SJeff Garzik */ 1951c6fd2807SJeff Garzik 1952c6fd2807SJeff Garzik /* find max transfer mode; for printk only */ 1953c6fd2807SJeff Garzik xfer_mask = ata_id_xfermask(id); 1954c6fd2807SJeff Garzik 1955c6fd2807SJeff Garzik if (ata_msg_probe(ap)) 1956c6fd2807SJeff Garzik ata_dump_id(id); 1957c6fd2807SJeff Garzik 1958ef143d57SAlbert Lee /* SCSI only uses 4-char revisions, dump full 8 chars from ATA */ 1959ef143d57SAlbert Lee ata_id_c_string(dev->id, fwrevbuf, ATA_ID_FW_REV, 1960ef143d57SAlbert Lee sizeof(fwrevbuf)); 1961ef143d57SAlbert Lee 1962ef143d57SAlbert Lee ata_id_c_string(dev->id, modelbuf, ATA_ID_PROD, 1963ef143d57SAlbert Lee sizeof(modelbuf)); 1964ef143d57SAlbert Lee 1965c6fd2807SJeff Garzik /* ATA-specific feature tests */ 1966c6fd2807SJeff Garzik if (dev->class == ATA_DEV_ATA) { 1967b352e57dSAlan Cox if (ata_id_is_cfa(id)) { 1968b352e57dSAlan Cox if (id[162] & 1) /* CPRM may make this media unusable */ 196944877b4eSTejun Heo ata_dev_printk(dev, KERN_WARNING, 197044877b4eSTejun Heo "supports DRM functions and may " 197144877b4eSTejun Heo "not be fully accessable.\n"); 1972b352e57dSAlan Cox snprintf(revbuf, 7, "CFA"); 1973b352e57dSAlan Cox } 1974b352e57dSAlan Cox else 1975b352e57dSAlan Cox snprintf(revbuf, 7, "ATA-%d", ata_id_major_version(id)); 1976b352e57dSAlan Cox 1977c6fd2807SJeff Garzik dev->n_sectors = ata_id_n_sectors(id); 1978c6fd2807SJeff Garzik 19793f64f565SEric D. Mudama if (dev->id[59] & 0x100) 19803f64f565SEric D. Mudama dev->multi_count = dev->id[59] & 0xff; 19813f64f565SEric D. Mudama 1982c6fd2807SJeff Garzik if (ata_id_has_lba(id)) { 1983c6fd2807SJeff Garzik const char *lba_desc; 1984c6fd2807SJeff Garzik char ncq_desc[20]; 1985c6fd2807SJeff Garzik 1986c6fd2807SJeff Garzik lba_desc = "LBA"; 1987c6fd2807SJeff Garzik dev->flags |= ATA_DFLAG_LBA; 1988c6fd2807SJeff Garzik if (ata_id_has_lba48(id)) { 1989c6fd2807SJeff Garzik dev->flags |= ATA_DFLAG_LBA48; 1990c6fd2807SJeff Garzik lba_desc = "LBA48"; 19916fc49adbSTejun Heo 19926fc49adbSTejun Heo if (dev->n_sectors >= (1UL << 28) && 19936fc49adbSTejun Heo ata_id_has_flush_ext(id)) 19946fc49adbSTejun Heo dev->flags |= ATA_DFLAG_FLUSH_EXT; 1995c6fd2807SJeff Garzik } 1996c6fd2807SJeff Garzik 1997c6fd2807SJeff Garzik /* config NCQ */ 1998c6fd2807SJeff Garzik ata_dev_config_ncq(dev, ncq_desc, sizeof(ncq_desc)); 1999c6fd2807SJeff Garzik 2000c6fd2807SJeff Garzik /* print device info to dmesg */ 20013f64f565SEric D. Mudama if (ata_msg_drv(ap) && print_info) { 20023f64f565SEric D. Mudama ata_dev_printk(dev, KERN_INFO, 20033f64f565SEric D. Mudama "%s: %s, %s, max %s\n", 20043f64f565SEric D. Mudama revbuf, modelbuf, fwrevbuf, 20053f64f565SEric D. Mudama ata_mode_string(xfer_mask)); 20063f64f565SEric D. Mudama ata_dev_printk(dev, KERN_INFO, 20073f64f565SEric D. Mudama "%Lu sectors, multi %u: %s %s\n", 2008c6fd2807SJeff Garzik (unsigned long long)dev->n_sectors, 20093f64f565SEric D. Mudama dev->multi_count, lba_desc, ncq_desc); 20103f64f565SEric D. Mudama } 2011c6fd2807SJeff Garzik } else { 2012c6fd2807SJeff Garzik /* CHS */ 2013c6fd2807SJeff Garzik 2014c6fd2807SJeff Garzik /* Default translation */ 2015c6fd2807SJeff Garzik dev->cylinders = id[1]; 2016c6fd2807SJeff Garzik dev->heads = id[3]; 2017c6fd2807SJeff Garzik dev->sectors = id[6]; 2018c6fd2807SJeff Garzik 2019c6fd2807SJeff Garzik if (ata_id_current_chs_valid(id)) { 2020c6fd2807SJeff Garzik /* Current CHS translation is valid. */ 2021c6fd2807SJeff Garzik dev->cylinders = id[54]; 2022c6fd2807SJeff Garzik dev->heads = id[55]; 2023c6fd2807SJeff Garzik dev->sectors = id[56]; 2024c6fd2807SJeff Garzik } 2025c6fd2807SJeff Garzik 2026c6fd2807SJeff Garzik /* print device info to dmesg */ 20273f64f565SEric D. Mudama if (ata_msg_drv(ap) && print_info) { 2028c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_INFO, 20293f64f565SEric D. Mudama "%s: %s, %s, max %s\n", 20303f64f565SEric D. Mudama revbuf, modelbuf, fwrevbuf, 20313f64f565SEric D. Mudama ata_mode_string(xfer_mask)); 20323f64f565SEric D. Mudama ata_dev_printk(dev, KERN_INFO, 20333f64f565SEric D. Mudama "%Lu sectors, multi %u, CHS %u/%u/%u\n", 20343f64f565SEric D. Mudama (unsigned long long)dev->n_sectors, 20353f64f565SEric D. Mudama dev->multi_count, dev->cylinders, 20363f64f565SEric D. Mudama dev->heads, dev->sectors); 20373f64f565SEric D. Mudama } 2038c6fd2807SJeff Garzik } 2039c6fd2807SJeff Garzik 2040c6fd2807SJeff Garzik dev->cdb_len = 16; 2041c6fd2807SJeff Garzik } 2042c6fd2807SJeff Garzik 2043c6fd2807SJeff Garzik /* ATAPI-specific feature tests */ 2044c6fd2807SJeff Garzik else if (dev->class == ATA_DEV_ATAPI) { 2045854c73a2STejun Heo const char *cdb_intr_string = ""; 2046854c73a2STejun Heo const char *atapi_an_string = ""; 20477d77b247STejun Heo u32 sntf; 2048c6fd2807SJeff Garzik 2049c6fd2807SJeff Garzik rc = atapi_cdb_len(id); 2050c6fd2807SJeff Garzik if ((rc < 12) || (rc > ATAPI_CDB_LEN)) { 2051c6fd2807SJeff Garzik if (ata_msg_warn(ap)) 2052c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_WARNING, 2053c6fd2807SJeff Garzik "unsupported CDB len\n"); 2054c6fd2807SJeff Garzik rc = -EINVAL; 2055c6fd2807SJeff Garzik goto err_out_nosup; 2056c6fd2807SJeff Garzik } 2057c6fd2807SJeff Garzik dev->cdb_len = (unsigned int) rc; 2058c6fd2807SJeff Garzik 20597d77b247STejun Heo /* Enable ATAPI AN if both the host and device have 20607d77b247STejun Heo * the support. If PMP is attached, SNTF is required 20617d77b247STejun Heo * to enable ATAPI AN to discern between PHY status 20627d77b247STejun Heo * changed notifications and ATAPI ANs. 20639f45cbd3SKristen Carlson Accardi */ 20647d77b247STejun Heo if ((ap->flags & ATA_FLAG_AN) && ata_id_has_atapi_AN(id) && 20657d77b247STejun Heo (!ap->nr_pmp_links || 20667d77b247STejun Heo sata_scr_read(&ap->link, SCR_NOTIFICATION, &sntf) == 0)) { 2067854c73a2STejun Heo unsigned int err_mask; 2068854c73a2STejun Heo 20699f45cbd3SKristen Carlson Accardi /* issue SET feature command to turn this on */ 2070854c73a2STejun Heo err_mask = ata_dev_set_AN(dev, SETFEATURES_SATA_ENABLE); 2071854c73a2STejun Heo if (err_mask) 20729f45cbd3SKristen Carlson Accardi ata_dev_printk(dev, KERN_ERR, 2073854c73a2STejun Heo "failed to enable ATAPI AN " 2074854c73a2STejun Heo "(err_mask=0x%x)\n", err_mask); 2075854c73a2STejun Heo else { 20769f45cbd3SKristen Carlson Accardi dev->flags |= ATA_DFLAG_AN; 2077854c73a2STejun Heo atapi_an_string = ", ATAPI AN"; 2078854c73a2STejun Heo } 20799f45cbd3SKristen Carlson Accardi } 20809f45cbd3SKristen Carlson Accardi 2081c6fd2807SJeff Garzik if (ata_id_cdb_intr(dev->id)) { 2082c6fd2807SJeff Garzik dev->flags |= ATA_DFLAG_CDB_INTR; 2083c6fd2807SJeff Garzik cdb_intr_string = ", CDB intr"; 2084c6fd2807SJeff Garzik } 2085c6fd2807SJeff Garzik 2086c6fd2807SJeff Garzik /* print device info to dmesg */ 2087c6fd2807SJeff Garzik if (ata_msg_drv(ap) && print_info) 2088ef143d57SAlbert Lee ata_dev_printk(dev, KERN_INFO, 2089854c73a2STejun Heo "ATAPI: %s, %s, max %s%s%s\n", 2090ef143d57SAlbert Lee modelbuf, fwrevbuf, 2091c6fd2807SJeff Garzik ata_mode_string(xfer_mask), 2092854c73a2STejun Heo cdb_intr_string, atapi_an_string); 2093c6fd2807SJeff Garzik } 2094c6fd2807SJeff Garzik 2095914ed354STejun Heo /* determine max_sectors */ 2096914ed354STejun Heo dev->max_sectors = ATA_MAX_SECTORS; 2097914ed354STejun Heo if (dev->flags & ATA_DFLAG_LBA48) 2098914ed354STejun Heo dev->max_sectors = ATA_MAX_SECTORS_LBA48; 2099914ed354STejun Heo 210093590859SAlan Cox if (dev->horkage & ATA_HORKAGE_DIAGNOSTIC) { 210193590859SAlan Cox /* Let the user know. We don't want to disallow opens for 210293590859SAlan Cox rescue purposes, or in case the vendor is just a blithering 210393590859SAlan Cox idiot */ 210493590859SAlan Cox if (print_info) { 210593590859SAlan Cox ata_dev_printk(dev, KERN_WARNING, 210693590859SAlan Cox "Drive reports diagnostics failure. This may indicate a drive\n"); 210793590859SAlan Cox ata_dev_printk(dev, KERN_WARNING, 210893590859SAlan Cox "fault or invalid emulation. Contact drive vendor for information.\n"); 210993590859SAlan Cox } 211093590859SAlan Cox } 211193590859SAlan Cox 2112c6fd2807SJeff Garzik /* limit bridge transfers to udma5, 200 sectors */ 2113c6fd2807SJeff Garzik if (ata_dev_knobble(dev)) { 2114c6fd2807SJeff Garzik if (ata_msg_drv(ap) && print_info) 2115c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_INFO, 2116c6fd2807SJeff Garzik "applying bridge limits\n"); 2117c6fd2807SJeff Garzik dev->udma_mask &= ATA_UDMA5; 2118c6fd2807SJeff Garzik dev->max_sectors = ATA_MAX_SECTORS; 2119c6fd2807SJeff Garzik } 2120c6fd2807SJeff Garzik 212175683fe7STejun Heo if (dev->horkage & ATA_HORKAGE_MAX_SEC_128) 212203ec52deSTejun Heo dev->max_sectors = min_t(unsigned int, ATA_MAX_SECTORS_128, 212303ec52deSTejun Heo dev->max_sectors); 212418d6e9d5SAlbert Lee 2125c6fd2807SJeff Garzik if (ap->ops->dev_config) 2126cd0d3bbcSAlan ap->ops->dev_config(dev); 2127c6fd2807SJeff Garzik 2128c6fd2807SJeff Garzik if (ata_msg_probe(ap)) 2129c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_DEBUG, "%s: EXIT, drv_stat = 0x%x\n", 2130c6fd2807SJeff Garzik __FUNCTION__, ata_chk_status(ap)); 2131c6fd2807SJeff Garzik return 0; 2132c6fd2807SJeff Garzik 2133c6fd2807SJeff Garzik err_out_nosup: 2134c6fd2807SJeff Garzik if (ata_msg_probe(ap)) 2135c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_DEBUG, 2136c6fd2807SJeff Garzik "%s: EXIT, err\n", __FUNCTION__); 2137c6fd2807SJeff Garzik return rc; 2138c6fd2807SJeff Garzik } 2139c6fd2807SJeff Garzik 2140c6fd2807SJeff Garzik /** 21412e41e8e6SAlan Cox * ata_cable_40wire - return 40 wire cable type 2142be0d18dfSAlan Cox * @ap: port 2143be0d18dfSAlan Cox * 21442e41e8e6SAlan Cox * Helper method for drivers which want to hardwire 40 wire cable 2145be0d18dfSAlan Cox * detection. 2146be0d18dfSAlan Cox */ 2147be0d18dfSAlan Cox 2148be0d18dfSAlan Cox int ata_cable_40wire(struct ata_port *ap) 2149be0d18dfSAlan Cox { 2150be0d18dfSAlan Cox return ATA_CBL_PATA40; 2151be0d18dfSAlan Cox } 2152be0d18dfSAlan Cox 2153be0d18dfSAlan Cox /** 21542e41e8e6SAlan Cox * ata_cable_80wire - return 80 wire cable type 2155be0d18dfSAlan Cox * @ap: port 2156be0d18dfSAlan Cox * 21572e41e8e6SAlan Cox * Helper method for drivers which want to hardwire 80 wire cable 2158be0d18dfSAlan Cox * detection. 2159be0d18dfSAlan Cox */ 2160be0d18dfSAlan Cox 2161be0d18dfSAlan Cox int ata_cable_80wire(struct ata_port *ap) 2162be0d18dfSAlan Cox { 2163be0d18dfSAlan Cox return ATA_CBL_PATA80; 2164be0d18dfSAlan Cox } 2165be0d18dfSAlan Cox 2166be0d18dfSAlan Cox /** 2167be0d18dfSAlan Cox * ata_cable_unknown - return unknown PATA cable. 2168be0d18dfSAlan Cox * @ap: port 2169be0d18dfSAlan Cox * 2170be0d18dfSAlan Cox * Helper method for drivers which have no PATA cable detection. 2171be0d18dfSAlan Cox */ 2172be0d18dfSAlan Cox 2173be0d18dfSAlan Cox int ata_cable_unknown(struct ata_port *ap) 2174be0d18dfSAlan Cox { 2175be0d18dfSAlan Cox return ATA_CBL_PATA_UNK; 2176be0d18dfSAlan Cox } 2177be0d18dfSAlan Cox 2178be0d18dfSAlan Cox /** 2179be0d18dfSAlan Cox * ata_cable_sata - return SATA cable type 2180be0d18dfSAlan Cox * @ap: port 2181be0d18dfSAlan Cox * 2182be0d18dfSAlan Cox * Helper method for drivers which have SATA cables 2183be0d18dfSAlan Cox */ 2184be0d18dfSAlan Cox 2185be0d18dfSAlan Cox int ata_cable_sata(struct ata_port *ap) 2186be0d18dfSAlan Cox { 2187be0d18dfSAlan Cox return ATA_CBL_SATA; 2188be0d18dfSAlan Cox } 2189be0d18dfSAlan Cox 2190be0d18dfSAlan Cox /** 2191c6fd2807SJeff Garzik * ata_bus_probe - Reset and probe ATA bus 2192c6fd2807SJeff Garzik * @ap: Bus to probe 2193c6fd2807SJeff Garzik * 2194c6fd2807SJeff Garzik * Master ATA bus probing function. Initiates a hardware-dependent 2195c6fd2807SJeff Garzik * bus reset, then attempts to identify any devices found on 2196c6fd2807SJeff Garzik * the bus. 2197c6fd2807SJeff Garzik * 2198c6fd2807SJeff Garzik * LOCKING: 2199c6fd2807SJeff Garzik * PCI/etc. bus probe sem. 2200c6fd2807SJeff Garzik * 2201c6fd2807SJeff Garzik * RETURNS: 2202c6fd2807SJeff Garzik * Zero on success, negative errno otherwise. 2203c6fd2807SJeff Garzik */ 2204c6fd2807SJeff Garzik 2205c6fd2807SJeff Garzik int ata_bus_probe(struct ata_port *ap) 2206c6fd2807SJeff Garzik { 2207c6fd2807SJeff Garzik unsigned int classes[ATA_MAX_DEVICES]; 2208c6fd2807SJeff Garzik int tries[ATA_MAX_DEVICES]; 2209f58229f8STejun Heo int rc; 2210c6fd2807SJeff Garzik struct ata_device *dev; 2211c6fd2807SJeff Garzik 2212c6fd2807SJeff Garzik ata_port_probe(ap); 2213c6fd2807SJeff Garzik 2214f58229f8STejun Heo ata_link_for_each_dev(dev, &ap->link) 2215f58229f8STejun Heo tries[dev->devno] = ATA_PROBE_MAX_TRIES; 2216c6fd2807SJeff Garzik 2217c6fd2807SJeff Garzik retry: 2218c6fd2807SJeff Garzik /* reset and determine device classes */ 2219c6fd2807SJeff Garzik ap->ops->phy_reset(ap); 2220c6fd2807SJeff Garzik 2221f58229f8STejun Heo ata_link_for_each_dev(dev, &ap->link) { 2222c6fd2807SJeff Garzik if (!(ap->flags & ATA_FLAG_DISABLED) && 2223c6fd2807SJeff Garzik dev->class != ATA_DEV_UNKNOWN) 2224c6fd2807SJeff Garzik classes[dev->devno] = dev->class; 2225c6fd2807SJeff Garzik else 2226c6fd2807SJeff Garzik classes[dev->devno] = ATA_DEV_NONE; 2227c6fd2807SJeff Garzik 2228c6fd2807SJeff Garzik dev->class = ATA_DEV_UNKNOWN; 2229c6fd2807SJeff Garzik } 2230c6fd2807SJeff Garzik 2231c6fd2807SJeff Garzik ata_port_probe(ap); 2232c6fd2807SJeff Garzik 2233c6fd2807SJeff Garzik /* after the reset the device state is PIO 0 and the controller 2234c6fd2807SJeff Garzik state is undefined. Record the mode */ 2235c6fd2807SJeff Garzik 2236f58229f8STejun Heo ata_link_for_each_dev(dev, &ap->link) 2237f58229f8STejun Heo dev->pio_mode = XFER_PIO_0; 2238c6fd2807SJeff Garzik 2239f31f0cc2SJeff Garzik /* read IDENTIFY page and configure devices. We have to do the identify 2240f31f0cc2SJeff Garzik specific sequence bass-ackwards so that PDIAG- is released by 2241f31f0cc2SJeff Garzik the slave device */ 2242f31f0cc2SJeff Garzik 2243f58229f8STejun Heo ata_link_for_each_dev(dev, &ap->link) { 2244f58229f8STejun Heo if (tries[dev->devno]) 2245f58229f8STejun Heo dev->class = classes[dev->devno]; 2246c6fd2807SJeff Garzik 2247c6fd2807SJeff Garzik if (!ata_dev_enabled(dev)) 2248c6fd2807SJeff Garzik continue; 2249c6fd2807SJeff Garzik 2250bff04647STejun Heo rc = ata_dev_read_id(dev, &dev->class, ATA_READID_POSTRESET, 2251bff04647STejun Heo dev->id); 2252c6fd2807SJeff Garzik if (rc) 2253c6fd2807SJeff Garzik goto fail; 2254f31f0cc2SJeff Garzik } 2255f31f0cc2SJeff Garzik 2256be0d18dfSAlan Cox /* Now ask for the cable type as PDIAG- should have been released */ 2257be0d18dfSAlan Cox if (ap->ops->cable_detect) 2258be0d18dfSAlan Cox ap->cbl = ap->ops->cable_detect(ap); 2259be0d18dfSAlan Cox 2260614fe29bSAlan Cox /* We may have SATA bridge glue hiding here irrespective of the 2261614fe29bSAlan Cox reported cable types and sensed types */ 2262614fe29bSAlan Cox ata_link_for_each_dev(dev, &ap->link) { 2263614fe29bSAlan Cox if (!ata_dev_enabled(dev)) 2264614fe29bSAlan Cox continue; 2265614fe29bSAlan Cox /* SATA drives indicate we have a bridge. We don't know which 2266614fe29bSAlan Cox end of the link the bridge is which is a problem */ 2267614fe29bSAlan Cox if (ata_id_is_sata(dev->id)) 2268614fe29bSAlan Cox ap->cbl = ATA_CBL_SATA; 2269614fe29bSAlan Cox } 2270614fe29bSAlan Cox 2271f31f0cc2SJeff Garzik /* After the identify sequence we can now set up the devices. We do 2272f31f0cc2SJeff Garzik this in the normal order so that the user doesn't get confused */ 2273f31f0cc2SJeff Garzik 2274f58229f8STejun Heo ata_link_for_each_dev(dev, &ap->link) { 2275f31f0cc2SJeff Garzik if (!ata_dev_enabled(dev)) 2276f31f0cc2SJeff Garzik continue; 2277c6fd2807SJeff Garzik 22789af5c9c9STejun Heo ap->link.eh_context.i.flags |= ATA_EHI_PRINTINFO; 2279efdaedc4STejun Heo rc = ata_dev_configure(dev); 22809af5c9c9STejun Heo ap->link.eh_context.i.flags &= ~ATA_EHI_PRINTINFO; 2281c6fd2807SJeff Garzik if (rc) 2282c6fd2807SJeff Garzik goto fail; 2283c6fd2807SJeff Garzik } 2284c6fd2807SJeff Garzik 2285c6fd2807SJeff Garzik /* configure transfer mode */ 22860260731fSTejun Heo rc = ata_set_mode(&ap->link, &dev); 22874ae72a1eSTejun Heo if (rc) 2288c6fd2807SJeff Garzik goto fail; 2289c6fd2807SJeff Garzik 2290f58229f8STejun Heo ata_link_for_each_dev(dev, &ap->link) 2291f58229f8STejun Heo if (ata_dev_enabled(dev)) 2292c6fd2807SJeff Garzik return 0; 2293c6fd2807SJeff Garzik 2294c6fd2807SJeff Garzik /* no device present, disable port */ 2295c6fd2807SJeff Garzik ata_port_disable(ap); 2296c6fd2807SJeff Garzik return -ENODEV; 2297c6fd2807SJeff Garzik 2298c6fd2807SJeff Garzik fail: 22994ae72a1eSTejun Heo tries[dev->devno]--; 23004ae72a1eSTejun Heo 2301c6fd2807SJeff Garzik switch (rc) { 2302c6fd2807SJeff Garzik case -EINVAL: 23034ae72a1eSTejun Heo /* eeek, something went very wrong, give up */ 2304c6fd2807SJeff Garzik tries[dev->devno] = 0; 2305c6fd2807SJeff Garzik break; 23064ae72a1eSTejun Heo 23074ae72a1eSTejun Heo case -ENODEV: 23084ae72a1eSTejun Heo /* give it just one more chance */ 23094ae72a1eSTejun Heo tries[dev->devno] = min(tries[dev->devno], 1); 2310c6fd2807SJeff Garzik case -EIO: 23114ae72a1eSTejun Heo if (tries[dev->devno] == 1) { 23124ae72a1eSTejun Heo /* This is the last chance, better to slow 23134ae72a1eSTejun Heo * down than lose it. 23144ae72a1eSTejun Heo */ 2315936fd732STejun Heo sata_down_spd_limit(&ap->link); 23164ae72a1eSTejun Heo ata_down_xfermask_limit(dev, ATA_DNXFER_PIO); 23174ae72a1eSTejun Heo } 2318c6fd2807SJeff Garzik } 2319c6fd2807SJeff Garzik 23204ae72a1eSTejun Heo if (!tries[dev->devno]) 2321c6fd2807SJeff Garzik ata_dev_disable(dev); 2322c6fd2807SJeff Garzik 2323c6fd2807SJeff Garzik goto retry; 2324c6fd2807SJeff Garzik } 2325c6fd2807SJeff Garzik 2326c6fd2807SJeff Garzik /** 2327c6fd2807SJeff Garzik * ata_port_probe - Mark port as enabled 2328c6fd2807SJeff Garzik * @ap: Port for which we indicate enablement 2329c6fd2807SJeff Garzik * 2330c6fd2807SJeff Garzik * Modify @ap data structure such that the system 2331c6fd2807SJeff Garzik * thinks that the entire port is enabled. 2332c6fd2807SJeff Garzik * 2333cca3974eSJeff Garzik * LOCKING: host lock, or some other form of 2334c6fd2807SJeff Garzik * serialization. 2335c6fd2807SJeff Garzik */ 2336c6fd2807SJeff Garzik 2337c6fd2807SJeff Garzik void ata_port_probe(struct ata_port *ap) 2338c6fd2807SJeff Garzik { 2339c6fd2807SJeff Garzik ap->flags &= ~ATA_FLAG_DISABLED; 2340c6fd2807SJeff Garzik } 2341c6fd2807SJeff Garzik 2342c6fd2807SJeff Garzik /** 2343c6fd2807SJeff Garzik * sata_print_link_status - Print SATA link status 2344936fd732STejun Heo * @link: SATA link to printk link status about 2345c6fd2807SJeff Garzik * 2346c6fd2807SJeff Garzik * This function prints link speed and status of a SATA link. 2347c6fd2807SJeff Garzik * 2348c6fd2807SJeff Garzik * LOCKING: 2349c6fd2807SJeff Garzik * None. 2350c6fd2807SJeff Garzik */ 2351936fd732STejun Heo void sata_print_link_status(struct ata_link *link) 2352c6fd2807SJeff Garzik { 2353c6fd2807SJeff Garzik u32 sstatus, scontrol, tmp; 2354c6fd2807SJeff Garzik 2355936fd732STejun Heo if (sata_scr_read(link, SCR_STATUS, &sstatus)) 2356c6fd2807SJeff Garzik return; 2357936fd732STejun Heo sata_scr_read(link, SCR_CONTROL, &scontrol); 2358c6fd2807SJeff Garzik 2359936fd732STejun Heo if (ata_link_online(link)) { 2360c6fd2807SJeff Garzik tmp = (sstatus >> 4) & 0xf; 2361936fd732STejun Heo ata_link_printk(link, KERN_INFO, 2362c6fd2807SJeff Garzik "SATA link up %s (SStatus %X SControl %X)\n", 2363c6fd2807SJeff Garzik sata_spd_string(tmp), sstatus, scontrol); 2364c6fd2807SJeff Garzik } else { 2365936fd732STejun Heo ata_link_printk(link, KERN_INFO, 2366c6fd2807SJeff Garzik "SATA link down (SStatus %X SControl %X)\n", 2367c6fd2807SJeff Garzik sstatus, scontrol); 2368c6fd2807SJeff Garzik } 2369c6fd2807SJeff Garzik } 2370c6fd2807SJeff Garzik 2371c6fd2807SJeff Garzik /** 2372c6fd2807SJeff Garzik * __sata_phy_reset - Wake/reset a low-level SATA PHY 2373c6fd2807SJeff Garzik * @ap: SATA port associated with target SATA PHY. 2374c6fd2807SJeff Garzik * 2375c6fd2807SJeff Garzik * This function issues commands to standard SATA Sxxx 2376c6fd2807SJeff Garzik * PHY registers, to wake up the phy (and device), and 2377c6fd2807SJeff Garzik * clear any reset condition. 2378c6fd2807SJeff Garzik * 2379c6fd2807SJeff Garzik * LOCKING: 2380c6fd2807SJeff Garzik * PCI/etc. bus probe sem. 2381c6fd2807SJeff Garzik * 2382c6fd2807SJeff Garzik */ 2383c6fd2807SJeff Garzik void __sata_phy_reset(struct ata_port *ap) 2384c6fd2807SJeff Garzik { 2385936fd732STejun Heo struct ata_link *link = &ap->link; 2386c6fd2807SJeff Garzik unsigned long timeout = jiffies + (HZ * 5); 2387936fd732STejun Heo u32 sstatus; 2388c6fd2807SJeff Garzik 2389c6fd2807SJeff Garzik if (ap->flags & ATA_FLAG_SATA_RESET) { 2390c6fd2807SJeff Garzik /* issue phy wake/reset */ 2391936fd732STejun Heo sata_scr_write_flush(link, SCR_CONTROL, 0x301); 2392c6fd2807SJeff Garzik /* Couldn't find anything in SATA I/II specs, but 2393c6fd2807SJeff Garzik * AHCI-1.1 10.4.2 says at least 1 ms. */ 2394c6fd2807SJeff Garzik mdelay(1); 2395c6fd2807SJeff Garzik } 2396c6fd2807SJeff Garzik /* phy wake/clear reset */ 2397936fd732STejun Heo sata_scr_write_flush(link, SCR_CONTROL, 0x300); 2398c6fd2807SJeff Garzik 2399c6fd2807SJeff Garzik /* wait for phy to become ready, if necessary */ 2400c6fd2807SJeff Garzik do { 2401c6fd2807SJeff Garzik msleep(200); 2402936fd732STejun Heo sata_scr_read(link, SCR_STATUS, &sstatus); 2403c6fd2807SJeff Garzik if ((sstatus & 0xf) != 1) 2404c6fd2807SJeff Garzik break; 2405c6fd2807SJeff Garzik } while (time_before(jiffies, timeout)); 2406c6fd2807SJeff Garzik 2407c6fd2807SJeff Garzik /* print link status */ 2408936fd732STejun Heo sata_print_link_status(link); 2409c6fd2807SJeff Garzik 2410c6fd2807SJeff Garzik /* TODO: phy layer with polling, timeouts, etc. */ 2411936fd732STejun Heo if (!ata_link_offline(link)) 2412c6fd2807SJeff Garzik ata_port_probe(ap); 2413c6fd2807SJeff Garzik else 2414c6fd2807SJeff Garzik ata_port_disable(ap); 2415c6fd2807SJeff Garzik 2416c6fd2807SJeff Garzik if (ap->flags & ATA_FLAG_DISABLED) 2417c6fd2807SJeff Garzik return; 2418c6fd2807SJeff Garzik 2419c6fd2807SJeff Garzik if (ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT)) { 2420c6fd2807SJeff Garzik ata_port_disable(ap); 2421c6fd2807SJeff Garzik return; 2422c6fd2807SJeff Garzik } 2423c6fd2807SJeff Garzik 2424c6fd2807SJeff Garzik ap->cbl = ATA_CBL_SATA; 2425c6fd2807SJeff Garzik } 2426c6fd2807SJeff Garzik 2427c6fd2807SJeff Garzik /** 2428c6fd2807SJeff Garzik * sata_phy_reset - Reset SATA bus. 2429c6fd2807SJeff Garzik * @ap: SATA port associated with target SATA PHY. 2430c6fd2807SJeff Garzik * 2431c6fd2807SJeff Garzik * This function resets the SATA bus, and then probes 2432c6fd2807SJeff Garzik * the bus for devices. 2433c6fd2807SJeff Garzik * 2434c6fd2807SJeff Garzik * LOCKING: 2435c6fd2807SJeff Garzik * PCI/etc. bus probe sem. 2436c6fd2807SJeff Garzik * 2437c6fd2807SJeff Garzik */ 2438c6fd2807SJeff Garzik void sata_phy_reset(struct ata_port *ap) 2439c6fd2807SJeff Garzik { 2440c6fd2807SJeff Garzik __sata_phy_reset(ap); 2441c6fd2807SJeff Garzik if (ap->flags & ATA_FLAG_DISABLED) 2442c6fd2807SJeff Garzik return; 2443c6fd2807SJeff Garzik ata_bus_reset(ap); 2444c6fd2807SJeff Garzik } 2445c6fd2807SJeff Garzik 2446c6fd2807SJeff Garzik /** 2447c6fd2807SJeff Garzik * ata_dev_pair - return other device on cable 2448c6fd2807SJeff Garzik * @adev: device 2449c6fd2807SJeff Garzik * 2450c6fd2807SJeff Garzik * Obtain the other device on the same cable, or if none is 2451c6fd2807SJeff Garzik * present NULL is returned 2452c6fd2807SJeff Garzik */ 2453c6fd2807SJeff Garzik 2454c6fd2807SJeff Garzik struct ata_device *ata_dev_pair(struct ata_device *adev) 2455c6fd2807SJeff Garzik { 24569af5c9c9STejun Heo struct ata_link *link = adev->link; 24579af5c9c9STejun Heo struct ata_device *pair = &link->device[1 - adev->devno]; 2458c6fd2807SJeff Garzik if (!ata_dev_enabled(pair)) 2459c6fd2807SJeff Garzik return NULL; 2460c6fd2807SJeff Garzik return pair; 2461c6fd2807SJeff Garzik } 2462c6fd2807SJeff Garzik 2463c6fd2807SJeff Garzik /** 2464c6fd2807SJeff Garzik * ata_port_disable - Disable port. 2465c6fd2807SJeff Garzik * @ap: Port to be disabled. 2466c6fd2807SJeff Garzik * 2467c6fd2807SJeff Garzik * Modify @ap data structure such that the system 2468c6fd2807SJeff Garzik * thinks that the entire port is disabled, and should 2469c6fd2807SJeff Garzik * never attempt to probe or communicate with devices 2470c6fd2807SJeff Garzik * on this port. 2471c6fd2807SJeff Garzik * 2472cca3974eSJeff Garzik * LOCKING: host lock, or some other form of 2473c6fd2807SJeff Garzik * serialization. 2474c6fd2807SJeff Garzik */ 2475c6fd2807SJeff Garzik 2476c6fd2807SJeff Garzik void ata_port_disable(struct ata_port *ap) 2477c6fd2807SJeff Garzik { 24789af5c9c9STejun Heo ap->link.device[0].class = ATA_DEV_NONE; 24799af5c9c9STejun Heo ap->link.device[1].class = ATA_DEV_NONE; 2480c6fd2807SJeff Garzik ap->flags |= ATA_FLAG_DISABLED; 2481c6fd2807SJeff Garzik } 2482c6fd2807SJeff Garzik 2483c6fd2807SJeff Garzik /** 2484c6fd2807SJeff Garzik * sata_down_spd_limit - adjust SATA spd limit downward 2485936fd732STejun Heo * @link: Link to adjust SATA spd limit for 2486c6fd2807SJeff Garzik * 2487936fd732STejun Heo * Adjust SATA spd limit of @link downward. Note that this 2488c6fd2807SJeff Garzik * function only adjusts the limit. The change must be applied 2489c6fd2807SJeff Garzik * using sata_set_spd(). 2490c6fd2807SJeff Garzik * 2491c6fd2807SJeff Garzik * LOCKING: 2492c6fd2807SJeff Garzik * Inherited from caller. 2493c6fd2807SJeff Garzik * 2494c6fd2807SJeff Garzik * RETURNS: 2495c6fd2807SJeff Garzik * 0 on success, negative errno on failure 2496c6fd2807SJeff Garzik */ 2497936fd732STejun Heo int sata_down_spd_limit(struct ata_link *link) 2498c6fd2807SJeff Garzik { 2499c6fd2807SJeff Garzik u32 sstatus, spd, mask; 2500c6fd2807SJeff Garzik int rc, highbit; 2501c6fd2807SJeff Garzik 2502936fd732STejun Heo if (!sata_scr_valid(link)) 2503008a7896STejun Heo return -EOPNOTSUPP; 2504008a7896STejun Heo 2505008a7896STejun Heo /* If SCR can be read, use it to determine the current SPD. 2506936fd732STejun Heo * If not, use cached value in link->sata_spd. 2507008a7896STejun Heo */ 2508936fd732STejun Heo rc = sata_scr_read(link, SCR_STATUS, &sstatus); 2509008a7896STejun Heo if (rc == 0) 2510008a7896STejun Heo spd = (sstatus >> 4) & 0xf; 2511008a7896STejun Heo else 2512936fd732STejun Heo spd = link->sata_spd; 2513c6fd2807SJeff Garzik 2514936fd732STejun Heo mask = link->sata_spd_limit; 2515c6fd2807SJeff Garzik if (mask <= 1) 2516c6fd2807SJeff Garzik return -EINVAL; 2517008a7896STejun Heo 2518008a7896STejun Heo /* unconditionally mask off the highest bit */ 2519c6fd2807SJeff Garzik highbit = fls(mask) - 1; 2520c6fd2807SJeff Garzik mask &= ~(1 << highbit); 2521c6fd2807SJeff Garzik 2522008a7896STejun Heo /* Mask off all speeds higher than or equal to the current 2523008a7896STejun Heo * one. Force 1.5Gbps if current SPD is not available. 2524008a7896STejun Heo */ 2525008a7896STejun Heo if (spd > 1) 2526008a7896STejun Heo mask &= (1 << (spd - 1)) - 1; 2527008a7896STejun Heo else 2528008a7896STejun Heo mask &= 1; 2529008a7896STejun Heo 2530008a7896STejun Heo /* were we already at the bottom? */ 2531c6fd2807SJeff Garzik if (!mask) 2532c6fd2807SJeff Garzik return -EINVAL; 2533c6fd2807SJeff Garzik 2534936fd732STejun Heo link->sata_spd_limit = mask; 2535c6fd2807SJeff Garzik 2536936fd732STejun Heo ata_link_printk(link, KERN_WARNING, "limiting SATA link speed to %s\n", 2537c6fd2807SJeff Garzik sata_spd_string(fls(mask))); 2538c6fd2807SJeff Garzik 2539c6fd2807SJeff Garzik return 0; 2540c6fd2807SJeff Garzik } 2541c6fd2807SJeff Garzik 2542936fd732STejun Heo static int __sata_set_spd_needed(struct ata_link *link, u32 *scontrol) 2543c6fd2807SJeff Garzik { 2544c6fd2807SJeff Garzik u32 spd, limit; 2545c6fd2807SJeff Garzik 2546936fd732STejun Heo if (link->sata_spd_limit == UINT_MAX) 2547c6fd2807SJeff Garzik limit = 0; 2548c6fd2807SJeff Garzik else 2549936fd732STejun Heo limit = fls(link->sata_spd_limit); 2550c6fd2807SJeff Garzik 2551c6fd2807SJeff Garzik spd = (*scontrol >> 4) & 0xf; 2552c6fd2807SJeff Garzik *scontrol = (*scontrol & ~0xf0) | ((limit & 0xf) << 4); 2553c6fd2807SJeff Garzik 2554c6fd2807SJeff Garzik return spd != limit; 2555c6fd2807SJeff Garzik } 2556c6fd2807SJeff Garzik 2557c6fd2807SJeff Garzik /** 2558c6fd2807SJeff Garzik * sata_set_spd_needed - is SATA spd configuration needed 2559936fd732STejun Heo * @link: Link in question 2560c6fd2807SJeff Garzik * 2561c6fd2807SJeff Garzik * Test whether the spd limit in SControl matches 2562936fd732STejun Heo * @link->sata_spd_limit. This function is used to determine 2563c6fd2807SJeff Garzik * whether hardreset is necessary to apply SATA spd 2564c6fd2807SJeff Garzik * configuration. 2565c6fd2807SJeff Garzik * 2566c6fd2807SJeff Garzik * LOCKING: 2567c6fd2807SJeff Garzik * Inherited from caller. 2568c6fd2807SJeff Garzik * 2569c6fd2807SJeff Garzik * RETURNS: 2570c6fd2807SJeff Garzik * 1 if SATA spd configuration is needed, 0 otherwise. 2571c6fd2807SJeff Garzik */ 2572936fd732STejun Heo int sata_set_spd_needed(struct ata_link *link) 2573c6fd2807SJeff Garzik { 2574c6fd2807SJeff Garzik u32 scontrol; 2575c6fd2807SJeff Garzik 2576936fd732STejun Heo if (sata_scr_read(link, SCR_CONTROL, &scontrol)) 2577c6fd2807SJeff Garzik return 0; 2578c6fd2807SJeff Garzik 2579936fd732STejun Heo return __sata_set_spd_needed(link, &scontrol); 2580c6fd2807SJeff Garzik } 2581c6fd2807SJeff Garzik 2582c6fd2807SJeff Garzik /** 2583c6fd2807SJeff Garzik * sata_set_spd - set SATA spd according to spd limit 2584936fd732STejun Heo * @link: Link to set SATA spd for 2585c6fd2807SJeff Garzik * 2586936fd732STejun Heo * Set SATA spd of @link according to sata_spd_limit. 2587c6fd2807SJeff Garzik * 2588c6fd2807SJeff Garzik * LOCKING: 2589c6fd2807SJeff Garzik * Inherited from caller. 2590c6fd2807SJeff Garzik * 2591c6fd2807SJeff Garzik * RETURNS: 2592c6fd2807SJeff Garzik * 0 if spd doesn't need to be changed, 1 if spd has been 2593c6fd2807SJeff Garzik * changed. Negative errno if SCR registers are inaccessible. 2594c6fd2807SJeff Garzik */ 2595936fd732STejun Heo int sata_set_spd(struct ata_link *link) 2596c6fd2807SJeff Garzik { 2597c6fd2807SJeff Garzik u32 scontrol; 2598c6fd2807SJeff Garzik int rc; 2599c6fd2807SJeff Garzik 2600936fd732STejun Heo if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol))) 2601c6fd2807SJeff Garzik return rc; 2602c6fd2807SJeff Garzik 2603936fd732STejun Heo if (!__sata_set_spd_needed(link, &scontrol)) 2604c6fd2807SJeff Garzik return 0; 2605c6fd2807SJeff Garzik 2606936fd732STejun Heo if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol))) 2607c6fd2807SJeff Garzik return rc; 2608c6fd2807SJeff Garzik 2609c6fd2807SJeff Garzik return 1; 2610c6fd2807SJeff Garzik } 2611c6fd2807SJeff Garzik 2612c6fd2807SJeff Garzik /* 2613c6fd2807SJeff Garzik * This mode timing computation functionality is ported over from 2614c6fd2807SJeff Garzik * drivers/ide/ide-timing.h and was originally written by Vojtech Pavlik 2615c6fd2807SJeff Garzik */ 2616c6fd2807SJeff Garzik /* 2617b352e57dSAlan Cox * PIO 0-4, MWDMA 0-2 and UDMA 0-6 timings (in nanoseconds). 2618c6fd2807SJeff Garzik * These were taken from ATA/ATAPI-6 standard, rev 0a, except 2619b352e57dSAlan Cox * for UDMA6, which is currently supported only by Maxtor drives. 2620b352e57dSAlan Cox * 2621b352e57dSAlan Cox * For PIO 5/6 MWDMA 3/4 see the CFA specification 3.0. 2622c6fd2807SJeff Garzik */ 2623c6fd2807SJeff Garzik 2624c6fd2807SJeff Garzik static const struct ata_timing ata_timing[] = { 2625c6fd2807SJeff Garzik 2626c6fd2807SJeff Garzik { XFER_UDMA_6, 0, 0, 0, 0, 0, 0, 0, 15 }, 2627c6fd2807SJeff Garzik { XFER_UDMA_5, 0, 0, 0, 0, 0, 0, 0, 20 }, 2628c6fd2807SJeff Garzik { XFER_UDMA_4, 0, 0, 0, 0, 0, 0, 0, 30 }, 2629c6fd2807SJeff Garzik { XFER_UDMA_3, 0, 0, 0, 0, 0, 0, 0, 45 }, 2630c6fd2807SJeff Garzik 2631b352e57dSAlan Cox { XFER_MW_DMA_4, 25, 0, 0, 0, 55, 20, 80, 0 }, 2632b352e57dSAlan Cox { XFER_MW_DMA_3, 25, 0, 0, 0, 65, 25, 100, 0 }, 2633c6fd2807SJeff Garzik { XFER_UDMA_2, 0, 0, 0, 0, 0, 0, 0, 60 }, 2634c6fd2807SJeff Garzik { XFER_UDMA_1, 0, 0, 0, 0, 0, 0, 0, 80 }, 2635c6fd2807SJeff Garzik { XFER_UDMA_0, 0, 0, 0, 0, 0, 0, 0, 120 }, 2636c6fd2807SJeff Garzik 2637c6fd2807SJeff Garzik /* { XFER_UDMA_SLOW, 0, 0, 0, 0, 0, 0, 0, 150 }, */ 2638c6fd2807SJeff Garzik 2639c6fd2807SJeff Garzik { XFER_MW_DMA_2, 25, 0, 0, 0, 70, 25, 120, 0 }, 2640c6fd2807SJeff Garzik { XFER_MW_DMA_1, 45, 0, 0, 0, 80, 50, 150, 0 }, 2641c6fd2807SJeff Garzik { XFER_MW_DMA_0, 60, 0, 0, 0, 215, 215, 480, 0 }, 2642c6fd2807SJeff Garzik 2643c6fd2807SJeff Garzik { XFER_SW_DMA_2, 60, 0, 0, 0, 120, 120, 240, 0 }, 2644c6fd2807SJeff Garzik { XFER_SW_DMA_1, 90, 0, 0, 0, 240, 240, 480, 0 }, 2645c6fd2807SJeff Garzik { XFER_SW_DMA_0, 120, 0, 0, 0, 480, 480, 960, 0 }, 2646c6fd2807SJeff Garzik 2647b352e57dSAlan Cox { XFER_PIO_6, 10, 55, 20, 80, 55, 20, 80, 0 }, 2648b352e57dSAlan Cox { XFER_PIO_5, 15, 65, 25, 100, 65, 25, 100, 0 }, 2649c6fd2807SJeff Garzik { XFER_PIO_4, 25, 70, 25, 120, 70, 25, 120, 0 }, 2650c6fd2807SJeff Garzik { XFER_PIO_3, 30, 80, 70, 180, 80, 70, 180, 0 }, 2651c6fd2807SJeff Garzik 2652c6fd2807SJeff Garzik { XFER_PIO_2, 30, 290, 40, 330, 100, 90, 240, 0 }, 2653c6fd2807SJeff Garzik { XFER_PIO_1, 50, 290, 93, 383, 125, 100, 383, 0 }, 2654c6fd2807SJeff Garzik { XFER_PIO_0, 70, 290, 240, 600, 165, 150, 600, 0 }, 2655c6fd2807SJeff Garzik 2656c6fd2807SJeff Garzik /* { XFER_PIO_SLOW, 120, 290, 240, 960, 290, 240, 960, 0 }, */ 2657c6fd2807SJeff Garzik 2658c6fd2807SJeff Garzik { 0xFF } 2659c6fd2807SJeff Garzik }; 2660c6fd2807SJeff Garzik 2661c6fd2807SJeff Garzik #define ENOUGH(v,unit) (((v)-1)/(unit)+1) 2662c6fd2807SJeff Garzik #define EZ(v,unit) ((v)?ENOUGH(v,unit):0) 2663c6fd2807SJeff Garzik 2664c6fd2807SJeff Garzik static void ata_timing_quantize(const struct ata_timing *t, struct ata_timing *q, int T, int UT) 2665c6fd2807SJeff Garzik { 2666c6fd2807SJeff Garzik q->setup = EZ(t->setup * 1000, T); 2667c6fd2807SJeff Garzik q->act8b = EZ(t->act8b * 1000, T); 2668c6fd2807SJeff Garzik q->rec8b = EZ(t->rec8b * 1000, T); 2669c6fd2807SJeff Garzik q->cyc8b = EZ(t->cyc8b * 1000, T); 2670c6fd2807SJeff Garzik q->active = EZ(t->active * 1000, T); 2671c6fd2807SJeff Garzik q->recover = EZ(t->recover * 1000, T); 2672c6fd2807SJeff Garzik q->cycle = EZ(t->cycle * 1000, T); 2673c6fd2807SJeff Garzik q->udma = EZ(t->udma * 1000, UT); 2674c6fd2807SJeff Garzik } 2675c6fd2807SJeff Garzik 2676c6fd2807SJeff Garzik void ata_timing_merge(const struct ata_timing *a, const struct ata_timing *b, 2677c6fd2807SJeff Garzik struct ata_timing *m, unsigned int what) 2678c6fd2807SJeff Garzik { 2679c6fd2807SJeff Garzik if (what & ATA_TIMING_SETUP ) m->setup = max(a->setup, b->setup); 2680c6fd2807SJeff Garzik if (what & ATA_TIMING_ACT8B ) m->act8b = max(a->act8b, b->act8b); 2681c6fd2807SJeff Garzik if (what & ATA_TIMING_REC8B ) m->rec8b = max(a->rec8b, b->rec8b); 2682c6fd2807SJeff Garzik if (what & ATA_TIMING_CYC8B ) m->cyc8b = max(a->cyc8b, b->cyc8b); 2683c6fd2807SJeff Garzik if (what & ATA_TIMING_ACTIVE ) m->active = max(a->active, b->active); 2684c6fd2807SJeff Garzik if (what & ATA_TIMING_RECOVER) m->recover = max(a->recover, b->recover); 2685c6fd2807SJeff Garzik if (what & ATA_TIMING_CYCLE ) m->cycle = max(a->cycle, b->cycle); 2686c6fd2807SJeff Garzik if (what & ATA_TIMING_UDMA ) m->udma = max(a->udma, b->udma); 2687c6fd2807SJeff Garzik } 2688c6fd2807SJeff Garzik 2689c6fd2807SJeff Garzik static const struct ata_timing* ata_timing_find_mode(unsigned short speed) 2690c6fd2807SJeff Garzik { 2691c6fd2807SJeff Garzik const struct ata_timing *t; 2692c6fd2807SJeff Garzik 2693c6fd2807SJeff Garzik for (t = ata_timing; t->mode != speed; t++) 2694c6fd2807SJeff Garzik if (t->mode == 0xFF) 2695c6fd2807SJeff Garzik return NULL; 2696c6fd2807SJeff Garzik return t; 2697c6fd2807SJeff Garzik } 2698c6fd2807SJeff Garzik 2699c6fd2807SJeff Garzik int ata_timing_compute(struct ata_device *adev, unsigned short speed, 2700c6fd2807SJeff Garzik struct ata_timing *t, int T, int UT) 2701c6fd2807SJeff Garzik { 2702c6fd2807SJeff Garzik const struct ata_timing *s; 2703c6fd2807SJeff Garzik struct ata_timing p; 2704c6fd2807SJeff Garzik 2705c6fd2807SJeff Garzik /* 2706c6fd2807SJeff Garzik * Find the mode. 2707c6fd2807SJeff Garzik */ 2708c6fd2807SJeff Garzik 2709c6fd2807SJeff Garzik if (!(s = ata_timing_find_mode(speed))) 2710c6fd2807SJeff Garzik return -EINVAL; 2711c6fd2807SJeff Garzik 2712c6fd2807SJeff Garzik memcpy(t, s, sizeof(*s)); 2713c6fd2807SJeff Garzik 2714c6fd2807SJeff Garzik /* 2715c6fd2807SJeff Garzik * If the drive is an EIDE drive, it can tell us it needs extended 2716c6fd2807SJeff Garzik * PIO/MW_DMA cycle timing. 2717c6fd2807SJeff Garzik */ 2718c6fd2807SJeff Garzik 2719c6fd2807SJeff Garzik if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE drive */ 2720c6fd2807SJeff Garzik memset(&p, 0, sizeof(p)); 2721c6fd2807SJeff Garzik if(speed >= XFER_PIO_0 && speed <= XFER_SW_DMA_0) { 2722c6fd2807SJeff Garzik if (speed <= XFER_PIO_2) p.cycle = p.cyc8b = adev->id[ATA_ID_EIDE_PIO]; 2723c6fd2807SJeff Garzik else p.cycle = p.cyc8b = adev->id[ATA_ID_EIDE_PIO_IORDY]; 2724c6fd2807SJeff Garzik } else if(speed >= XFER_MW_DMA_0 && speed <= XFER_MW_DMA_2) { 2725c6fd2807SJeff Garzik p.cycle = adev->id[ATA_ID_EIDE_DMA_MIN]; 2726c6fd2807SJeff Garzik } 2727c6fd2807SJeff Garzik ata_timing_merge(&p, t, t, ATA_TIMING_CYCLE | ATA_TIMING_CYC8B); 2728c6fd2807SJeff Garzik } 2729c6fd2807SJeff Garzik 2730c6fd2807SJeff Garzik /* 2731c6fd2807SJeff Garzik * Convert the timing to bus clock counts. 2732c6fd2807SJeff Garzik */ 2733c6fd2807SJeff Garzik 2734c6fd2807SJeff Garzik ata_timing_quantize(t, t, T, UT); 2735c6fd2807SJeff Garzik 2736c6fd2807SJeff Garzik /* 2737c6fd2807SJeff Garzik * Even in DMA/UDMA modes we still use PIO access for IDENTIFY, 2738c6fd2807SJeff Garzik * S.M.A.R.T * and some other commands. We have to ensure that the 2739c6fd2807SJeff Garzik * DMA cycle timing is slower/equal than the fastest PIO timing. 2740c6fd2807SJeff Garzik */ 2741c6fd2807SJeff Garzik 2742fd3367afSAlan if (speed > XFER_PIO_6) { 2743c6fd2807SJeff Garzik ata_timing_compute(adev, adev->pio_mode, &p, T, UT); 2744c6fd2807SJeff Garzik ata_timing_merge(&p, t, t, ATA_TIMING_ALL); 2745c6fd2807SJeff Garzik } 2746c6fd2807SJeff Garzik 2747c6fd2807SJeff Garzik /* 2748c6fd2807SJeff Garzik * Lengthen active & recovery time so that cycle time is correct. 2749c6fd2807SJeff Garzik */ 2750c6fd2807SJeff Garzik 2751c6fd2807SJeff Garzik if (t->act8b + t->rec8b < t->cyc8b) { 2752c6fd2807SJeff Garzik t->act8b += (t->cyc8b - (t->act8b + t->rec8b)) / 2; 2753c6fd2807SJeff Garzik t->rec8b = t->cyc8b - t->act8b; 2754c6fd2807SJeff Garzik } 2755c6fd2807SJeff Garzik 2756c6fd2807SJeff Garzik if (t->active + t->recover < t->cycle) { 2757c6fd2807SJeff Garzik t->active += (t->cycle - (t->active + t->recover)) / 2; 2758c6fd2807SJeff Garzik t->recover = t->cycle - t->active; 2759c6fd2807SJeff Garzik } 27604f701d1eSAlan Cox 27614f701d1eSAlan Cox /* In a few cases quantisation may produce enough errors to 27624f701d1eSAlan Cox leave t->cycle too low for the sum of active and recovery 27634f701d1eSAlan Cox if so we must correct this */ 27644f701d1eSAlan Cox if (t->active + t->recover > t->cycle) 27654f701d1eSAlan Cox t->cycle = t->active + t->recover; 2766c6fd2807SJeff Garzik 2767c6fd2807SJeff Garzik return 0; 2768c6fd2807SJeff Garzik } 2769c6fd2807SJeff Garzik 2770c6fd2807SJeff Garzik /** 2771c6fd2807SJeff Garzik * ata_down_xfermask_limit - adjust dev xfer masks downward 2772c6fd2807SJeff Garzik * @dev: Device to adjust xfer masks 2773458337dbSTejun Heo * @sel: ATA_DNXFER_* selector 2774c6fd2807SJeff Garzik * 2775c6fd2807SJeff Garzik * Adjust xfer masks of @dev downward. Note that this function 2776c6fd2807SJeff Garzik * does not apply the change. Invoking ata_set_mode() afterwards 2777c6fd2807SJeff Garzik * will apply the limit. 2778c6fd2807SJeff Garzik * 2779c6fd2807SJeff Garzik * LOCKING: 2780c6fd2807SJeff Garzik * Inherited from caller. 2781c6fd2807SJeff Garzik * 2782c6fd2807SJeff Garzik * RETURNS: 2783c6fd2807SJeff Garzik * 0 on success, negative errno on failure 2784c6fd2807SJeff Garzik */ 2785458337dbSTejun Heo int ata_down_xfermask_limit(struct ata_device *dev, unsigned int sel) 2786c6fd2807SJeff Garzik { 2787458337dbSTejun Heo char buf[32]; 2788458337dbSTejun Heo unsigned int orig_mask, xfer_mask; 2789458337dbSTejun Heo unsigned int pio_mask, mwdma_mask, udma_mask; 2790458337dbSTejun Heo int quiet, highbit; 2791c6fd2807SJeff Garzik 2792458337dbSTejun Heo quiet = !!(sel & ATA_DNXFER_QUIET); 2793458337dbSTejun Heo sel &= ~ATA_DNXFER_QUIET; 2794458337dbSTejun Heo 2795458337dbSTejun Heo xfer_mask = orig_mask = ata_pack_xfermask(dev->pio_mask, 2796458337dbSTejun Heo dev->mwdma_mask, 2797c6fd2807SJeff Garzik dev->udma_mask); 2798458337dbSTejun Heo ata_unpack_xfermask(xfer_mask, &pio_mask, &mwdma_mask, &udma_mask); 2799c6fd2807SJeff Garzik 2800458337dbSTejun Heo switch (sel) { 2801458337dbSTejun Heo case ATA_DNXFER_PIO: 2802458337dbSTejun Heo highbit = fls(pio_mask) - 1; 2803458337dbSTejun Heo pio_mask &= ~(1 << highbit); 2804458337dbSTejun Heo break; 2805458337dbSTejun Heo 2806458337dbSTejun Heo case ATA_DNXFER_DMA: 2807458337dbSTejun Heo if (udma_mask) { 2808458337dbSTejun Heo highbit = fls(udma_mask) - 1; 2809458337dbSTejun Heo udma_mask &= ~(1 << highbit); 2810458337dbSTejun Heo if (!udma_mask) 2811458337dbSTejun Heo return -ENOENT; 2812458337dbSTejun Heo } else if (mwdma_mask) { 2813458337dbSTejun Heo highbit = fls(mwdma_mask) - 1; 2814458337dbSTejun Heo mwdma_mask &= ~(1 << highbit); 2815458337dbSTejun Heo if (!mwdma_mask) 2816458337dbSTejun Heo return -ENOENT; 2817458337dbSTejun Heo } 2818458337dbSTejun Heo break; 2819458337dbSTejun Heo 2820458337dbSTejun Heo case ATA_DNXFER_40C: 2821458337dbSTejun Heo udma_mask &= ATA_UDMA_MASK_40C; 2822458337dbSTejun Heo break; 2823458337dbSTejun Heo 2824458337dbSTejun Heo case ATA_DNXFER_FORCE_PIO0: 2825458337dbSTejun Heo pio_mask &= 1; 2826458337dbSTejun Heo case ATA_DNXFER_FORCE_PIO: 2827458337dbSTejun Heo mwdma_mask = 0; 2828458337dbSTejun Heo udma_mask = 0; 2829458337dbSTejun Heo break; 2830458337dbSTejun Heo 2831458337dbSTejun Heo default: 2832458337dbSTejun Heo BUG(); 2833458337dbSTejun Heo } 2834458337dbSTejun Heo 2835458337dbSTejun Heo xfer_mask &= ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask); 2836458337dbSTejun Heo 2837458337dbSTejun Heo if (!(xfer_mask & ATA_MASK_PIO) || xfer_mask == orig_mask) 2838458337dbSTejun Heo return -ENOENT; 2839458337dbSTejun Heo 2840458337dbSTejun Heo if (!quiet) { 2841458337dbSTejun Heo if (xfer_mask & (ATA_MASK_MWDMA | ATA_MASK_UDMA)) 2842458337dbSTejun Heo snprintf(buf, sizeof(buf), "%s:%s", 2843458337dbSTejun Heo ata_mode_string(xfer_mask), 2844458337dbSTejun Heo ata_mode_string(xfer_mask & ATA_MASK_PIO)); 2845458337dbSTejun Heo else 2846458337dbSTejun Heo snprintf(buf, sizeof(buf), "%s", 2847458337dbSTejun Heo ata_mode_string(xfer_mask)); 2848458337dbSTejun Heo 2849458337dbSTejun Heo ata_dev_printk(dev, KERN_WARNING, 2850458337dbSTejun Heo "limiting speed to %s\n", buf); 2851458337dbSTejun Heo } 2852c6fd2807SJeff Garzik 2853c6fd2807SJeff Garzik ata_unpack_xfermask(xfer_mask, &dev->pio_mask, &dev->mwdma_mask, 2854c6fd2807SJeff Garzik &dev->udma_mask); 2855c6fd2807SJeff Garzik 2856c6fd2807SJeff Garzik return 0; 2857c6fd2807SJeff Garzik } 2858c6fd2807SJeff Garzik 2859c6fd2807SJeff Garzik static int ata_dev_set_mode(struct ata_device *dev) 2860c6fd2807SJeff Garzik { 28619af5c9c9STejun Heo struct ata_eh_context *ehc = &dev->link->eh_context; 2862c6fd2807SJeff Garzik unsigned int err_mask; 2863c6fd2807SJeff Garzik int rc; 2864c6fd2807SJeff Garzik 2865c6fd2807SJeff Garzik dev->flags &= ~ATA_DFLAG_PIO; 2866c6fd2807SJeff Garzik if (dev->xfer_shift == ATA_SHIFT_PIO) 2867c6fd2807SJeff Garzik dev->flags |= ATA_DFLAG_PIO; 2868c6fd2807SJeff Garzik 2869c6fd2807SJeff Garzik err_mask = ata_dev_set_xfermode(dev); 287011750a40SAlan /* Old CFA may refuse this command, which is just fine */ 287111750a40SAlan if (dev->xfer_shift == ATA_SHIFT_PIO && ata_id_is_cfa(dev->id)) 287211750a40SAlan err_mask &= ~AC_ERR_DEV; 28730bc2a79aSAlan Cox /* Some very old devices and some bad newer ones fail any kind of 28740bc2a79aSAlan Cox SET_XFERMODE request but support PIO0-2 timings and no IORDY */ 28750bc2a79aSAlan Cox if (dev->xfer_shift == ATA_SHIFT_PIO && !ata_id_has_iordy(dev->id) && 28760bc2a79aSAlan Cox dev->pio_mode <= XFER_PIO_2) 28770bc2a79aSAlan Cox err_mask &= ~AC_ERR_DEV; 2878c6fd2807SJeff Garzik if (err_mask) { 2879c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_ERR, "failed to set xfermode " 2880c6fd2807SJeff Garzik "(err_mask=0x%x)\n", err_mask); 2881c6fd2807SJeff Garzik return -EIO; 2882c6fd2807SJeff Garzik } 2883c6fd2807SJeff Garzik 2884baa1e78aSTejun Heo ehc->i.flags |= ATA_EHI_POST_SETMODE; 2885422c9daaSTejun Heo rc = ata_dev_revalidate(dev, ATA_DEV_UNKNOWN, 0); 2886baa1e78aSTejun Heo ehc->i.flags &= ~ATA_EHI_POST_SETMODE; 2887c6fd2807SJeff Garzik if (rc) 2888c6fd2807SJeff Garzik return rc; 2889c6fd2807SJeff Garzik 2890c6fd2807SJeff Garzik DPRINTK("xfer_shift=%u, xfer_mode=0x%x\n", 2891c6fd2807SJeff Garzik dev->xfer_shift, (int)dev->xfer_mode); 2892c6fd2807SJeff Garzik 2893c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_INFO, "configured for %s\n", 2894c6fd2807SJeff Garzik ata_mode_string(ata_xfer_mode2mask(dev->xfer_mode))); 2895c6fd2807SJeff Garzik return 0; 2896c6fd2807SJeff Garzik } 2897c6fd2807SJeff Garzik 2898c6fd2807SJeff Garzik /** 289904351821SAlan * ata_do_set_mode - Program timings and issue SET FEATURES - XFER 29000260731fSTejun Heo * @link: link on which timings will be programmed 2901c6fd2807SJeff Garzik * @r_failed_dev: out paramter for failed device 2902c6fd2807SJeff Garzik * 290304351821SAlan * Standard implementation of the function used to tune and set 290404351821SAlan * ATA device disk transfer mode (PIO3, UDMA6, etc.). If 290504351821SAlan * ata_dev_set_mode() fails, pointer to the failing device is 2906c6fd2807SJeff Garzik * returned in @r_failed_dev. 2907c6fd2807SJeff Garzik * 2908c6fd2807SJeff Garzik * LOCKING: 2909c6fd2807SJeff Garzik * PCI/etc. bus probe sem. 2910c6fd2807SJeff Garzik * 2911c6fd2807SJeff Garzik * RETURNS: 2912c6fd2807SJeff Garzik * 0 on success, negative errno otherwise 2913c6fd2807SJeff Garzik */ 291404351821SAlan 29150260731fSTejun Heo int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev) 2916c6fd2807SJeff Garzik { 29170260731fSTejun Heo struct ata_port *ap = link->ap; 2918c6fd2807SJeff Garzik struct ata_device *dev; 2919f58229f8STejun Heo int rc = 0, used_dma = 0, found = 0; 2920c6fd2807SJeff Garzik 2921c6fd2807SJeff Garzik /* step 1: calculate xfer_mask */ 2922f58229f8STejun Heo ata_link_for_each_dev(dev, link) { 2923c6fd2807SJeff Garzik unsigned int pio_mask, dma_mask; 2924b3a70601SAlan Cox unsigned int mode_mask; 2925c6fd2807SJeff Garzik 2926c6fd2807SJeff Garzik if (!ata_dev_enabled(dev)) 2927c6fd2807SJeff Garzik continue; 2928c6fd2807SJeff Garzik 2929b3a70601SAlan Cox mode_mask = ATA_DMA_MASK_ATA; 2930b3a70601SAlan Cox if (dev->class == ATA_DEV_ATAPI) 2931b3a70601SAlan Cox mode_mask = ATA_DMA_MASK_ATAPI; 2932b3a70601SAlan Cox else if (ata_id_is_cfa(dev->id)) 2933b3a70601SAlan Cox mode_mask = ATA_DMA_MASK_CFA; 2934b3a70601SAlan Cox 2935c6fd2807SJeff Garzik ata_dev_xfermask(dev); 2936c6fd2807SJeff Garzik 2937c6fd2807SJeff Garzik pio_mask = ata_pack_xfermask(dev->pio_mask, 0, 0); 2938c6fd2807SJeff Garzik dma_mask = ata_pack_xfermask(0, dev->mwdma_mask, dev->udma_mask); 2939b3a70601SAlan Cox 2940b3a70601SAlan Cox if (libata_dma_mask & mode_mask) 2941b3a70601SAlan Cox dma_mask = ata_pack_xfermask(0, dev->mwdma_mask, dev->udma_mask); 2942b3a70601SAlan Cox else 2943b3a70601SAlan Cox dma_mask = 0; 2944b3a70601SAlan Cox 2945c6fd2807SJeff Garzik dev->pio_mode = ata_xfer_mask2mode(pio_mask); 2946c6fd2807SJeff Garzik dev->dma_mode = ata_xfer_mask2mode(dma_mask); 2947c6fd2807SJeff Garzik 2948c6fd2807SJeff Garzik found = 1; 2949c6fd2807SJeff Garzik if (dev->dma_mode) 2950c6fd2807SJeff Garzik used_dma = 1; 2951c6fd2807SJeff Garzik } 2952c6fd2807SJeff Garzik if (!found) 2953c6fd2807SJeff Garzik goto out; 2954c6fd2807SJeff Garzik 2955c6fd2807SJeff Garzik /* step 2: always set host PIO timings */ 2956f58229f8STejun Heo ata_link_for_each_dev(dev, link) { 2957c6fd2807SJeff Garzik if (!ata_dev_enabled(dev)) 2958c6fd2807SJeff Garzik continue; 2959c6fd2807SJeff Garzik 2960c6fd2807SJeff Garzik if (!dev->pio_mode) { 2961c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_WARNING, "no PIO support\n"); 2962c6fd2807SJeff Garzik rc = -EINVAL; 2963c6fd2807SJeff Garzik goto out; 2964c6fd2807SJeff Garzik } 2965c6fd2807SJeff Garzik 2966c6fd2807SJeff Garzik dev->xfer_mode = dev->pio_mode; 2967c6fd2807SJeff Garzik dev->xfer_shift = ATA_SHIFT_PIO; 2968c6fd2807SJeff Garzik if (ap->ops->set_piomode) 2969c6fd2807SJeff Garzik ap->ops->set_piomode(ap, dev); 2970c6fd2807SJeff Garzik } 2971c6fd2807SJeff Garzik 2972c6fd2807SJeff Garzik /* step 3: set host DMA timings */ 2973f58229f8STejun Heo ata_link_for_each_dev(dev, link) { 2974c6fd2807SJeff Garzik if (!ata_dev_enabled(dev) || !dev->dma_mode) 2975c6fd2807SJeff Garzik continue; 2976c6fd2807SJeff Garzik 2977c6fd2807SJeff Garzik dev->xfer_mode = dev->dma_mode; 2978c6fd2807SJeff Garzik dev->xfer_shift = ata_xfer_mode2shift(dev->dma_mode); 2979c6fd2807SJeff Garzik if (ap->ops->set_dmamode) 2980c6fd2807SJeff Garzik ap->ops->set_dmamode(ap, dev); 2981c6fd2807SJeff Garzik } 2982c6fd2807SJeff Garzik 2983c6fd2807SJeff Garzik /* step 4: update devices' xfer mode */ 2984f58229f8STejun Heo ata_link_for_each_dev(dev, link) { 298518d90debSAlan /* don't update suspended devices' xfer mode */ 29869666f400STejun Heo if (!ata_dev_enabled(dev)) 2987c6fd2807SJeff Garzik continue; 2988c6fd2807SJeff Garzik 2989c6fd2807SJeff Garzik rc = ata_dev_set_mode(dev); 2990c6fd2807SJeff Garzik if (rc) 2991c6fd2807SJeff Garzik goto out; 2992c6fd2807SJeff Garzik } 2993c6fd2807SJeff Garzik 2994c6fd2807SJeff Garzik /* Record simplex status. If we selected DMA then the other 2995c6fd2807SJeff Garzik * host channels are not permitted to do so. 2996c6fd2807SJeff Garzik */ 2997cca3974eSJeff Garzik if (used_dma && (ap->host->flags & ATA_HOST_SIMPLEX)) 2998032af1ceSAlan ap->host->simplex_claimed = ap; 2999c6fd2807SJeff Garzik 3000c6fd2807SJeff Garzik out: 3001c6fd2807SJeff Garzik if (rc) 3002c6fd2807SJeff Garzik *r_failed_dev = dev; 3003c6fd2807SJeff Garzik return rc; 3004c6fd2807SJeff Garzik } 3005c6fd2807SJeff Garzik 3006c6fd2807SJeff Garzik /** 300704351821SAlan * ata_set_mode - Program timings and issue SET FEATURES - XFER 30080260731fSTejun Heo * @link: link on which timings will be programmed 300904351821SAlan * @r_failed_dev: out paramter for failed device 301004351821SAlan * 301104351821SAlan * Set ATA device disk transfer mode (PIO3, UDMA6, etc.). If 301204351821SAlan * ata_set_mode() fails, pointer to the failing device is 301304351821SAlan * returned in @r_failed_dev. 301404351821SAlan * 301504351821SAlan * LOCKING: 301604351821SAlan * PCI/etc. bus probe sem. 301704351821SAlan * 301804351821SAlan * RETURNS: 301904351821SAlan * 0 on success, negative errno otherwise 302004351821SAlan */ 30210260731fSTejun Heo int ata_set_mode(struct ata_link *link, struct ata_device **r_failed_dev) 302204351821SAlan { 30230260731fSTejun Heo struct ata_port *ap = link->ap; 30240260731fSTejun Heo 302504351821SAlan /* has private set_mode? */ 302604351821SAlan if (ap->ops->set_mode) 30270260731fSTejun Heo return ap->ops->set_mode(link, r_failed_dev); 30280260731fSTejun Heo return ata_do_set_mode(link, r_failed_dev); 302904351821SAlan } 303004351821SAlan 303104351821SAlan /** 3032c6fd2807SJeff Garzik * ata_tf_to_host - issue ATA taskfile to host controller 3033c6fd2807SJeff Garzik * @ap: port to which command is being issued 3034c6fd2807SJeff Garzik * @tf: ATA taskfile register set 3035c6fd2807SJeff Garzik * 3036c6fd2807SJeff Garzik * Issues ATA taskfile register set to ATA host controller, 3037c6fd2807SJeff Garzik * with proper synchronization with interrupt handler and 3038c6fd2807SJeff Garzik * other threads. 3039c6fd2807SJeff Garzik * 3040c6fd2807SJeff Garzik * LOCKING: 3041cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 3042c6fd2807SJeff Garzik */ 3043c6fd2807SJeff Garzik 3044c6fd2807SJeff Garzik static inline void ata_tf_to_host(struct ata_port *ap, 3045c6fd2807SJeff Garzik const struct ata_taskfile *tf) 3046c6fd2807SJeff Garzik { 3047c6fd2807SJeff Garzik ap->ops->tf_load(ap, tf); 3048c6fd2807SJeff Garzik ap->ops->exec_command(ap, tf); 3049c6fd2807SJeff Garzik } 3050c6fd2807SJeff Garzik 3051c6fd2807SJeff Garzik /** 3052c6fd2807SJeff Garzik * ata_busy_sleep - sleep until BSY clears, or timeout 3053c6fd2807SJeff Garzik * @ap: port containing status register to be polled 3054c6fd2807SJeff Garzik * @tmout_pat: impatience timeout 3055c6fd2807SJeff Garzik * @tmout: overall timeout 3056c6fd2807SJeff Garzik * 3057c6fd2807SJeff Garzik * Sleep until ATA Status register bit BSY clears, 3058c6fd2807SJeff Garzik * or a timeout occurs. 3059c6fd2807SJeff Garzik * 3060d1adc1bbSTejun Heo * LOCKING: 3061d1adc1bbSTejun Heo * Kernel thread context (may sleep). 3062d1adc1bbSTejun Heo * 3063d1adc1bbSTejun Heo * RETURNS: 3064d1adc1bbSTejun Heo * 0 on success, -errno otherwise. 3065c6fd2807SJeff Garzik */ 3066d1adc1bbSTejun Heo int ata_busy_sleep(struct ata_port *ap, 3067c6fd2807SJeff Garzik unsigned long tmout_pat, unsigned long tmout) 3068c6fd2807SJeff Garzik { 3069c6fd2807SJeff Garzik unsigned long timer_start, timeout; 3070c6fd2807SJeff Garzik u8 status; 3071c6fd2807SJeff Garzik 3072c6fd2807SJeff Garzik status = ata_busy_wait(ap, ATA_BUSY, 300); 3073c6fd2807SJeff Garzik timer_start = jiffies; 3074c6fd2807SJeff Garzik timeout = timer_start + tmout_pat; 3075d1adc1bbSTejun Heo while (status != 0xff && (status & ATA_BUSY) && 3076d1adc1bbSTejun Heo time_before(jiffies, timeout)) { 3077c6fd2807SJeff Garzik msleep(50); 3078c6fd2807SJeff Garzik status = ata_busy_wait(ap, ATA_BUSY, 3); 3079c6fd2807SJeff Garzik } 3080c6fd2807SJeff Garzik 3081d1adc1bbSTejun Heo if (status != 0xff && (status & ATA_BUSY)) 3082c6fd2807SJeff Garzik ata_port_printk(ap, KERN_WARNING, 308335aa7a43SJeff Garzik "port is slow to respond, please be patient " 308435aa7a43SJeff Garzik "(Status 0x%x)\n", status); 3085c6fd2807SJeff Garzik 3086c6fd2807SJeff Garzik timeout = timer_start + tmout; 3087d1adc1bbSTejun Heo while (status != 0xff && (status & ATA_BUSY) && 3088d1adc1bbSTejun Heo time_before(jiffies, timeout)) { 3089c6fd2807SJeff Garzik msleep(50); 3090c6fd2807SJeff Garzik status = ata_chk_status(ap); 3091c6fd2807SJeff Garzik } 3092c6fd2807SJeff Garzik 3093d1adc1bbSTejun Heo if (status == 0xff) 3094d1adc1bbSTejun Heo return -ENODEV; 3095d1adc1bbSTejun Heo 3096c6fd2807SJeff Garzik if (status & ATA_BUSY) { 3097c6fd2807SJeff Garzik ata_port_printk(ap, KERN_ERR, "port failed to respond " 309835aa7a43SJeff Garzik "(%lu secs, Status 0x%x)\n", 309935aa7a43SJeff Garzik tmout / HZ, status); 3100d1adc1bbSTejun Heo return -EBUSY; 3101c6fd2807SJeff Garzik } 3102c6fd2807SJeff Garzik 3103c6fd2807SJeff Garzik return 0; 3104c6fd2807SJeff Garzik } 3105c6fd2807SJeff Garzik 3106d4b2bab4STejun Heo /** 3107d4b2bab4STejun Heo * ata_wait_ready - sleep until BSY clears, or timeout 3108d4b2bab4STejun Heo * @ap: port containing status register to be polled 3109d4b2bab4STejun Heo * @deadline: deadline jiffies for the operation 3110d4b2bab4STejun Heo * 3111d4b2bab4STejun Heo * Sleep until ATA Status register bit BSY clears, or timeout 3112d4b2bab4STejun Heo * occurs. 3113d4b2bab4STejun Heo * 3114d4b2bab4STejun Heo * LOCKING: 3115d4b2bab4STejun Heo * Kernel thread context (may sleep). 3116d4b2bab4STejun Heo * 3117d4b2bab4STejun Heo * RETURNS: 3118d4b2bab4STejun Heo * 0 on success, -errno otherwise. 3119d4b2bab4STejun Heo */ 3120d4b2bab4STejun Heo int ata_wait_ready(struct ata_port *ap, unsigned long deadline) 3121d4b2bab4STejun Heo { 3122d4b2bab4STejun Heo unsigned long start = jiffies; 3123d4b2bab4STejun Heo int warned = 0; 3124d4b2bab4STejun Heo 3125d4b2bab4STejun Heo while (1) { 3126d4b2bab4STejun Heo u8 status = ata_chk_status(ap); 3127d4b2bab4STejun Heo unsigned long now = jiffies; 3128d4b2bab4STejun Heo 3129d4b2bab4STejun Heo if (!(status & ATA_BUSY)) 3130d4b2bab4STejun Heo return 0; 3131936fd732STejun Heo if (!ata_link_online(&ap->link) && status == 0xff) 3132d4b2bab4STejun Heo return -ENODEV; 3133d4b2bab4STejun Heo if (time_after(now, deadline)) 3134d4b2bab4STejun Heo return -EBUSY; 3135d4b2bab4STejun Heo 3136d4b2bab4STejun Heo if (!warned && time_after(now, start + 5 * HZ) && 3137d4b2bab4STejun Heo (deadline - now > 3 * HZ)) { 3138d4b2bab4STejun Heo ata_port_printk(ap, KERN_WARNING, 3139d4b2bab4STejun Heo "port is slow to respond, please be patient " 3140d4b2bab4STejun Heo "(Status 0x%x)\n", status); 3141d4b2bab4STejun Heo warned = 1; 3142d4b2bab4STejun Heo } 3143d4b2bab4STejun Heo 3144d4b2bab4STejun Heo msleep(50); 3145d4b2bab4STejun Heo } 3146d4b2bab4STejun Heo } 3147d4b2bab4STejun Heo 3148d4b2bab4STejun Heo static int ata_bus_post_reset(struct ata_port *ap, unsigned int devmask, 3149d4b2bab4STejun Heo unsigned long deadline) 3150c6fd2807SJeff Garzik { 3151c6fd2807SJeff Garzik struct ata_ioports *ioaddr = &ap->ioaddr; 3152c6fd2807SJeff Garzik unsigned int dev0 = devmask & (1 << 0); 3153c6fd2807SJeff Garzik unsigned int dev1 = devmask & (1 << 1); 31549b89391cSTejun Heo int rc, ret = 0; 3155c6fd2807SJeff Garzik 3156c6fd2807SJeff Garzik /* if device 0 was found in ata_devchk, wait for its 3157c6fd2807SJeff Garzik * BSY bit to clear 3158c6fd2807SJeff Garzik */ 3159d4b2bab4STejun Heo if (dev0) { 3160d4b2bab4STejun Heo rc = ata_wait_ready(ap, deadline); 31619b89391cSTejun Heo if (rc) { 31629b89391cSTejun Heo if (rc != -ENODEV) 3163d4b2bab4STejun Heo return rc; 31649b89391cSTejun Heo ret = rc; 31659b89391cSTejun Heo } 3166d4b2bab4STejun Heo } 3167c6fd2807SJeff Garzik 3168e141d999STejun Heo /* if device 1 was found in ata_devchk, wait for register 3169e141d999STejun Heo * access briefly, then wait for BSY to clear. 3170c6fd2807SJeff Garzik */ 3171e141d999STejun Heo if (dev1) { 3172e141d999STejun Heo int i; 3173c6fd2807SJeff Garzik 3174c6fd2807SJeff Garzik ap->ops->dev_select(ap, 1); 3175e141d999STejun Heo 3176e141d999STejun Heo /* Wait for register access. Some ATAPI devices fail 3177e141d999STejun Heo * to set nsect/lbal after reset, so don't waste too 3178e141d999STejun Heo * much time on it. We're gonna wait for !BSY anyway. 3179e141d999STejun Heo */ 3180e141d999STejun Heo for (i = 0; i < 2; i++) { 3181e141d999STejun Heo u8 nsect, lbal; 3182e141d999STejun Heo 31830d5ff566STejun Heo nsect = ioread8(ioaddr->nsect_addr); 31840d5ff566STejun Heo lbal = ioread8(ioaddr->lbal_addr); 3185c6fd2807SJeff Garzik if ((nsect == 1) && (lbal == 1)) 3186c6fd2807SJeff Garzik break; 3187c6fd2807SJeff Garzik msleep(50); /* give drive a breather */ 3188c6fd2807SJeff Garzik } 3189e141d999STejun Heo 3190d4b2bab4STejun Heo rc = ata_wait_ready(ap, deadline); 31919b89391cSTejun Heo if (rc) { 31929b89391cSTejun Heo if (rc != -ENODEV) 3193d4b2bab4STejun Heo return rc; 31949b89391cSTejun Heo ret = rc; 31959b89391cSTejun Heo } 3196d4b2bab4STejun Heo } 3197c6fd2807SJeff Garzik 3198c6fd2807SJeff Garzik /* is all this really necessary? */ 3199c6fd2807SJeff Garzik ap->ops->dev_select(ap, 0); 3200c6fd2807SJeff Garzik if (dev1) 3201c6fd2807SJeff Garzik ap->ops->dev_select(ap, 1); 3202c6fd2807SJeff Garzik if (dev0) 3203c6fd2807SJeff Garzik ap->ops->dev_select(ap, 0); 3204d4b2bab4STejun Heo 32059b89391cSTejun Heo return ret; 3206c6fd2807SJeff Garzik } 3207c6fd2807SJeff Garzik 3208d4b2bab4STejun Heo static int ata_bus_softreset(struct ata_port *ap, unsigned int devmask, 3209d4b2bab4STejun Heo unsigned long deadline) 3210c6fd2807SJeff Garzik { 3211c6fd2807SJeff Garzik struct ata_ioports *ioaddr = &ap->ioaddr; 3212681c80b5SAlan Cox struct ata_device *dev; 3213681c80b5SAlan Cox int i = 0; 3214c6fd2807SJeff Garzik 321544877b4eSTejun Heo DPRINTK("ata%u: bus reset via SRST\n", ap->print_id); 3216c6fd2807SJeff Garzik 3217c6fd2807SJeff Garzik /* software reset. causes dev0 to be selected */ 32180d5ff566STejun Heo iowrite8(ap->ctl, ioaddr->ctl_addr); 3219c6fd2807SJeff Garzik udelay(20); /* FIXME: flush */ 32200d5ff566STejun Heo iowrite8(ap->ctl | ATA_SRST, ioaddr->ctl_addr); 3221c6fd2807SJeff Garzik udelay(20); /* FIXME: flush */ 32220d5ff566STejun Heo iowrite8(ap->ctl, ioaddr->ctl_addr); 3223c6fd2807SJeff Garzik 3224681c80b5SAlan Cox /* If we issued an SRST then an ATA drive (not ATAPI) 3225681c80b5SAlan Cox * may have changed configuration and be in PIO0 timing. If 3226681c80b5SAlan Cox * we did a hard reset (or are coming from power on) this is 3227681c80b5SAlan Cox * true for ATA or ATAPI. Until we've set a suitable controller 3228681c80b5SAlan Cox * mode we should not touch the bus as we may be talking too fast. 3229681c80b5SAlan Cox */ 3230681c80b5SAlan Cox 3231681c80b5SAlan Cox ata_link_for_each_dev(dev, &ap->link) 3232681c80b5SAlan Cox dev->pio_mode = XFER_PIO_0; 3233681c80b5SAlan Cox 3234681c80b5SAlan Cox /* If the controller has a pio mode setup function then use 3235681c80b5SAlan Cox it to set the chipset to rights. Don't touch the DMA setup 3236681c80b5SAlan Cox as that will be dealt with when revalidating */ 3237681c80b5SAlan Cox if (ap->ops->set_piomode) { 3238681c80b5SAlan Cox ata_link_for_each_dev(dev, &ap->link) 3239681c80b5SAlan Cox if (devmask & (1 << i++)) 3240681c80b5SAlan Cox ap->ops->set_piomode(ap, dev); 3241681c80b5SAlan Cox } 3242681c80b5SAlan Cox 3243c6fd2807SJeff Garzik /* spec mandates ">= 2ms" before checking status. 3244c6fd2807SJeff Garzik * We wait 150ms, because that was the magic delay used for 3245c6fd2807SJeff Garzik * ATAPI devices in Hale Landis's ATADRVR, for the period of time 3246c6fd2807SJeff Garzik * between when the ATA command register is written, and then 3247c6fd2807SJeff Garzik * status is checked. Because waiting for "a while" before 3248c6fd2807SJeff Garzik * checking status is fine, post SRST, we perform this magic 3249c6fd2807SJeff Garzik * delay here as well. 3250c6fd2807SJeff Garzik * 3251c6fd2807SJeff Garzik * Old drivers/ide uses the 2mS rule and then waits for ready 3252c6fd2807SJeff Garzik */ 3253c6fd2807SJeff Garzik msleep(150); 3254c6fd2807SJeff Garzik 3255c6fd2807SJeff Garzik /* Before we perform post reset processing we want to see if 3256c6fd2807SJeff Garzik * the bus shows 0xFF because the odd clown forgets the D7 3257c6fd2807SJeff Garzik * pulldown resistor. 3258c6fd2807SJeff Garzik */ 3259d1adc1bbSTejun Heo if (ata_check_status(ap) == 0xFF) 32609b89391cSTejun Heo return -ENODEV; 3261c6fd2807SJeff Garzik 3262d4b2bab4STejun Heo return ata_bus_post_reset(ap, devmask, deadline); 3263c6fd2807SJeff Garzik } 3264c6fd2807SJeff Garzik 3265c6fd2807SJeff Garzik /** 3266c6fd2807SJeff Garzik * ata_bus_reset - reset host port and associated ATA channel 3267c6fd2807SJeff Garzik * @ap: port to reset 3268c6fd2807SJeff Garzik * 3269c6fd2807SJeff Garzik * This is typically the first time we actually start issuing 3270c6fd2807SJeff Garzik * commands to the ATA channel. We wait for BSY to clear, then 3271c6fd2807SJeff Garzik * issue EXECUTE DEVICE DIAGNOSTIC command, polling for its 3272c6fd2807SJeff Garzik * result. Determine what devices, if any, are on the channel 3273c6fd2807SJeff Garzik * by looking at the device 0/1 error register. Look at the signature 3274c6fd2807SJeff Garzik * stored in each device's taskfile registers, to determine if 3275c6fd2807SJeff Garzik * the device is ATA or ATAPI. 3276c6fd2807SJeff Garzik * 3277c6fd2807SJeff Garzik * LOCKING: 3278c6fd2807SJeff Garzik * PCI/etc. bus probe sem. 3279cca3974eSJeff Garzik * Obtains host lock. 3280c6fd2807SJeff Garzik * 3281c6fd2807SJeff Garzik * SIDE EFFECTS: 3282c6fd2807SJeff Garzik * Sets ATA_FLAG_DISABLED if bus reset fails. 3283c6fd2807SJeff Garzik */ 3284c6fd2807SJeff Garzik 3285c6fd2807SJeff Garzik void ata_bus_reset(struct ata_port *ap) 3286c6fd2807SJeff Garzik { 32879af5c9c9STejun Heo struct ata_device *device = ap->link.device; 3288c6fd2807SJeff Garzik struct ata_ioports *ioaddr = &ap->ioaddr; 3289c6fd2807SJeff Garzik unsigned int slave_possible = ap->flags & ATA_FLAG_SLAVE_POSS; 3290c6fd2807SJeff Garzik u8 err; 3291c6fd2807SJeff Garzik unsigned int dev0, dev1 = 0, devmask = 0; 32929b89391cSTejun Heo int rc; 3293c6fd2807SJeff Garzik 329444877b4eSTejun Heo DPRINTK("ENTER, host %u, port %u\n", ap->print_id, ap->port_no); 3295c6fd2807SJeff Garzik 3296c6fd2807SJeff Garzik /* determine if device 0/1 are present */ 3297c6fd2807SJeff Garzik if (ap->flags & ATA_FLAG_SATA_RESET) 3298c6fd2807SJeff Garzik dev0 = 1; 3299c6fd2807SJeff Garzik else { 3300c6fd2807SJeff Garzik dev0 = ata_devchk(ap, 0); 3301c6fd2807SJeff Garzik if (slave_possible) 3302c6fd2807SJeff Garzik dev1 = ata_devchk(ap, 1); 3303c6fd2807SJeff Garzik } 3304c6fd2807SJeff Garzik 3305c6fd2807SJeff Garzik if (dev0) 3306c6fd2807SJeff Garzik devmask |= (1 << 0); 3307c6fd2807SJeff Garzik if (dev1) 3308c6fd2807SJeff Garzik devmask |= (1 << 1); 3309c6fd2807SJeff Garzik 3310c6fd2807SJeff Garzik /* select device 0 again */ 3311c6fd2807SJeff Garzik ap->ops->dev_select(ap, 0); 3312c6fd2807SJeff Garzik 3313c6fd2807SJeff Garzik /* issue bus reset */ 33149b89391cSTejun Heo if (ap->flags & ATA_FLAG_SRST) { 33159b89391cSTejun Heo rc = ata_bus_softreset(ap, devmask, jiffies + 40 * HZ); 33169b89391cSTejun Heo if (rc && rc != -ENODEV) 3317c6fd2807SJeff Garzik goto err_out; 33189b89391cSTejun Heo } 3319c6fd2807SJeff Garzik 3320c6fd2807SJeff Garzik /* 3321c6fd2807SJeff Garzik * determine by signature whether we have ATA or ATAPI devices 3322c6fd2807SJeff Garzik */ 33233f19859eSTejun Heo device[0].class = ata_dev_try_classify(&device[0], dev0, &err); 3324c6fd2807SJeff Garzik if ((slave_possible) && (err != 0x81)) 33253f19859eSTejun Heo device[1].class = ata_dev_try_classify(&device[1], dev1, &err); 3326c6fd2807SJeff Garzik 3327c6fd2807SJeff Garzik /* is double-select really necessary? */ 33289af5c9c9STejun Heo if (device[1].class != ATA_DEV_NONE) 3329c6fd2807SJeff Garzik ap->ops->dev_select(ap, 1); 33309af5c9c9STejun Heo if (device[0].class != ATA_DEV_NONE) 3331c6fd2807SJeff Garzik ap->ops->dev_select(ap, 0); 3332c6fd2807SJeff Garzik 3333c6fd2807SJeff Garzik /* if no devices were detected, disable this port */ 33349af5c9c9STejun Heo if ((device[0].class == ATA_DEV_NONE) && 33359af5c9c9STejun Heo (device[1].class == ATA_DEV_NONE)) 3336c6fd2807SJeff Garzik goto err_out; 3337c6fd2807SJeff Garzik 3338c6fd2807SJeff Garzik if (ap->flags & (ATA_FLAG_SATA_RESET | ATA_FLAG_SRST)) { 3339c6fd2807SJeff Garzik /* set up device control for ATA_FLAG_SATA_RESET */ 33400d5ff566STejun Heo iowrite8(ap->ctl, ioaddr->ctl_addr); 3341c6fd2807SJeff Garzik } 3342c6fd2807SJeff Garzik 3343c6fd2807SJeff Garzik DPRINTK("EXIT\n"); 3344c6fd2807SJeff Garzik return; 3345c6fd2807SJeff Garzik 3346c6fd2807SJeff Garzik err_out: 3347c6fd2807SJeff Garzik ata_port_printk(ap, KERN_ERR, "disabling port\n"); 3348ac8869d5SJeff Garzik ata_port_disable(ap); 3349c6fd2807SJeff Garzik 3350c6fd2807SJeff Garzik DPRINTK("EXIT\n"); 3351c6fd2807SJeff Garzik } 3352c6fd2807SJeff Garzik 3353c6fd2807SJeff Garzik /** 3354936fd732STejun Heo * sata_link_debounce - debounce SATA phy status 3355936fd732STejun Heo * @link: ATA link to debounce SATA phy status for 3356c6fd2807SJeff Garzik * @params: timing parameters { interval, duratinon, timeout } in msec 3357d4b2bab4STejun Heo * @deadline: deadline jiffies for the operation 3358c6fd2807SJeff Garzik * 3359936fd732STejun Heo * Make sure SStatus of @link reaches stable state, determined by 3360c6fd2807SJeff Garzik * holding the same value where DET is not 1 for @duration polled 3361c6fd2807SJeff Garzik * every @interval, before @timeout. Timeout constraints the 3362d4b2bab4STejun Heo * beginning of the stable state. Because DET gets stuck at 1 on 3363d4b2bab4STejun Heo * some controllers after hot unplugging, this functions waits 3364c6fd2807SJeff Garzik * until timeout then returns 0 if DET is stable at 1. 3365c6fd2807SJeff Garzik * 3366d4b2bab4STejun Heo * @timeout is further limited by @deadline. The sooner of the 3367d4b2bab4STejun Heo * two is used. 3368d4b2bab4STejun Heo * 3369c6fd2807SJeff Garzik * LOCKING: 3370c6fd2807SJeff Garzik * Kernel thread context (may sleep) 3371c6fd2807SJeff Garzik * 3372c6fd2807SJeff Garzik * RETURNS: 3373c6fd2807SJeff Garzik * 0 on success, -errno on failure. 3374c6fd2807SJeff Garzik */ 3375936fd732STejun Heo int sata_link_debounce(struct ata_link *link, const unsigned long *params, 3376d4b2bab4STejun Heo unsigned long deadline) 3377c6fd2807SJeff Garzik { 3378c6fd2807SJeff Garzik unsigned long interval_msec = params[0]; 3379d4b2bab4STejun Heo unsigned long duration = msecs_to_jiffies(params[1]); 3380d4b2bab4STejun Heo unsigned long last_jiffies, t; 3381c6fd2807SJeff Garzik u32 last, cur; 3382c6fd2807SJeff Garzik int rc; 3383c6fd2807SJeff Garzik 3384d4b2bab4STejun Heo t = jiffies + msecs_to_jiffies(params[2]); 3385d4b2bab4STejun Heo if (time_before(t, deadline)) 3386d4b2bab4STejun Heo deadline = t; 3387d4b2bab4STejun Heo 3388936fd732STejun Heo if ((rc = sata_scr_read(link, SCR_STATUS, &cur))) 3389c6fd2807SJeff Garzik return rc; 3390c6fd2807SJeff Garzik cur &= 0xf; 3391c6fd2807SJeff Garzik 3392c6fd2807SJeff Garzik last = cur; 3393c6fd2807SJeff Garzik last_jiffies = jiffies; 3394c6fd2807SJeff Garzik 3395c6fd2807SJeff Garzik while (1) { 3396c6fd2807SJeff Garzik msleep(interval_msec); 3397936fd732STejun Heo if ((rc = sata_scr_read(link, SCR_STATUS, &cur))) 3398c6fd2807SJeff Garzik return rc; 3399c6fd2807SJeff Garzik cur &= 0xf; 3400c6fd2807SJeff Garzik 3401c6fd2807SJeff Garzik /* DET stable? */ 3402c6fd2807SJeff Garzik if (cur == last) { 3403d4b2bab4STejun Heo if (cur == 1 && time_before(jiffies, deadline)) 3404c6fd2807SJeff Garzik continue; 3405c6fd2807SJeff Garzik if (time_after(jiffies, last_jiffies + duration)) 3406c6fd2807SJeff Garzik return 0; 3407c6fd2807SJeff Garzik continue; 3408c6fd2807SJeff Garzik } 3409c6fd2807SJeff Garzik 3410c6fd2807SJeff Garzik /* unstable, start over */ 3411c6fd2807SJeff Garzik last = cur; 3412c6fd2807SJeff Garzik last_jiffies = jiffies; 3413c6fd2807SJeff Garzik 3414f1545154STejun Heo /* Check deadline. If debouncing failed, return 3415f1545154STejun Heo * -EPIPE to tell upper layer to lower link speed. 3416f1545154STejun Heo */ 3417d4b2bab4STejun Heo if (time_after(jiffies, deadline)) 3418f1545154STejun Heo return -EPIPE; 3419c6fd2807SJeff Garzik } 3420c6fd2807SJeff Garzik } 3421c6fd2807SJeff Garzik 3422c6fd2807SJeff Garzik /** 3423936fd732STejun Heo * sata_link_resume - resume SATA link 3424936fd732STejun Heo * @link: ATA link to resume SATA 3425c6fd2807SJeff Garzik * @params: timing parameters { interval, duratinon, timeout } in msec 3426d4b2bab4STejun Heo * @deadline: deadline jiffies for the operation 3427c6fd2807SJeff Garzik * 3428936fd732STejun Heo * Resume SATA phy @link and debounce it. 3429c6fd2807SJeff Garzik * 3430c6fd2807SJeff Garzik * LOCKING: 3431c6fd2807SJeff Garzik * Kernel thread context (may sleep) 3432c6fd2807SJeff Garzik * 3433c6fd2807SJeff Garzik * RETURNS: 3434c6fd2807SJeff Garzik * 0 on success, -errno on failure. 3435c6fd2807SJeff Garzik */ 3436936fd732STejun Heo int sata_link_resume(struct ata_link *link, const unsigned long *params, 3437d4b2bab4STejun Heo unsigned long deadline) 3438c6fd2807SJeff Garzik { 3439c6fd2807SJeff Garzik u32 scontrol; 3440c6fd2807SJeff Garzik int rc; 3441c6fd2807SJeff Garzik 3442936fd732STejun Heo if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol))) 3443c6fd2807SJeff Garzik return rc; 3444c6fd2807SJeff Garzik 3445c6fd2807SJeff Garzik scontrol = (scontrol & 0x0f0) | 0x300; 3446c6fd2807SJeff Garzik 3447936fd732STejun Heo if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol))) 3448c6fd2807SJeff Garzik return rc; 3449c6fd2807SJeff Garzik 3450c6fd2807SJeff Garzik /* Some PHYs react badly if SStatus is pounded immediately 3451c6fd2807SJeff Garzik * after resuming. Delay 200ms before debouncing. 3452c6fd2807SJeff Garzik */ 3453c6fd2807SJeff Garzik msleep(200); 3454c6fd2807SJeff Garzik 3455936fd732STejun Heo return sata_link_debounce(link, params, deadline); 3456c6fd2807SJeff Garzik } 3457c6fd2807SJeff Garzik 3458c6fd2807SJeff Garzik /** 3459c6fd2807SJeff Garzik * ata_std_prereset - prepare for reset 3460cc0680a5STejun Heo * @link: ATA link to be reset 3461d4b2bab4STejun Heo * @deadline: deadline jiffies for the operation 3462c6fd2807SJeff Garzik * 3463cc0680a5STejun Heo * @link is about to be reset. Initialize it. Failure from 3464b8cffc6aSTejun Heo * prereset makes libata abort whole reset sequence and give up 3465b8cffc6aSTejun Heo * that port, so prereset should be best-effort. It does its 3466b8cffc6aSTejun Heo * best to prepare for reset sequence but if things go wrong, it 3467b8cffc6aSTejun Heo * should just whine, not fail. 3468c6fd2807SJeff Garzik * 3469c6fd2807SJeff Garzik * LOCKING: 3470c6fd2807SJeff Garzik * Kernel thread context (may sleep) 3471c6fd2807SJeff Garzik * 3472c6fd2807SJeff Garzik * RETURNS: 3473c6fd2807SJeff Garzik * 0 on success, -errno otherwise. 3474c6fd2807SJeff Garzik */ 3475cc0680a5STejun Heo int ata_std_prereset(struct ata_link *link, unsigned long deadline) 3476c6fd2807SJeff Garzik { 3477cc0680a5STejun Heo struct ata_port *ap = link->ap; 3478936fd732STejun Heo struct ata_eh_context *ehc = &link->eh_context; 3479c6fd2807SJeff Garzik const unsigned long *timing = sata_ehc_deb_timing(ehc); 3480c6fd2807SJeff Garzik int rc; 3481c6fd2807SJeff Garzik 348231daabdaSTejun Heo /* handle link resume */ 3483c6fd2807SJeff Garzik if ((ehc->i.flags & ATA_EHI_RESUME_LINK) && 34840c88758bSTejun Heo (link->flags & ATA_LFLAG_HRST_TO_RESUME)) 3485c6fd2807SJeff Garzik ehc->i.action |= ATA_EH_HARDRESET; 3486c6fd2807SJeff Garzik 3487633273a3STejun Heo /* Some PMPs don't work with only SRST, force hardreset if PMP 3488633273a3STejun Heo * is supported. 3489633273a3STejun Heo */ 3490633273a3STejun Heo if (ap->flags & ATA_FLAG_PMP) 3491633273a3STejun Heo ehc->i.action |= ATA_EH_HARDRESET; 3492633273a3STejun Heo 3493c6fd2807SJeff Garzik /* if we're about to do hardreset, nothing more to do */ 3494c6fd2807SJeff Garzik if (ehc->i.action & ATA_EH_HARDRESET) 3495c6fd2807SJeff Garzik return 0; 3496c6fd2807SJeff Garzik 3497936fd732STejun Heo /* if SATA, resume link */ 3498a16abc0bSTejun Heo if (ap->flags & ATA_FLAG_SATA) { 3499936fd732STejun Heo rc = sata_link_resume(link, timing, deadline); 3500b8cffc6aSTejun Heo /* whine about phy resume failure but proceed */ 3501b8cffc6aSTejun Heo if (rc && rc != -EOPNOTSUPP) 3502cc0680a5STejun Heo ata_link_printk(link, KERN_WARNING, "failed to resume " 3503c6fd2807SJeff Garzik "link for reset (errno=%d)\n", rc); 3504c6fd2807SJeff Garzik } 3505c6fd2807SJeff Garzik 3506c6fd2807SJeff Garzik /* Wait for !BSY if the controller can wait for the first D2H 3507c6fd2807SJeff Garzik * Reg FIS and we don't know that no device is attached. 3508c6fd2807SJeff Garzik */ 35090c88758bSTejun Heo if (!(link->flags & ATA_LFLAG_SKIP_D2H_BSY) && !ata_link_offline(link)) { 3510b8cffc6aSTejun Heo rc = ata_wait_ready(ap, deadline); 35116dffaf61STejun Heo if (rc && rc != -ENODEV) { 3512cc0680a5STejun Heo ata_link_printk(link, KERN_WARNING, "device not ready " 3513b8cffc6aSTejun Heo "(errno=%d), forcing hardreset\n", rc); 3514b8cffc6aSTejun Heo ehc->i.action |= ATA_EH_HARDRESET; 3515b8cffc6aSTejun Heo } 3516b8cffc6aSTejun Heo } 3517c6fd2807SJeff Garzik 3518c6fd2807SJeff Garzik return 0; 3519c6fd2807SJeff Garzik } 3520c6fd2807SJeff Garzik 3521c6fd2807SJeff Garzik /** 3522c6fd2807SJeff Garzik * ata_std_softreset - reset host port via ATA SRST 3523cc0680a5STejun Heo * @link: ATA link to reset 3524c6fd2807SJeff Garzik * @classes: resulting classes of attached devices 3525d4b2bab4STejun Heo * @deadline: deadline jiffies for the operation 3526c6fd2807SJeff Garzik * 3527c6fd2807SJeff Garzik * Reset host port using ATA SRST. 3528c6fd2807SJeff Garzik * 3529c6fd2807SJeff Garzik * LOCKING: 3530c6fd2807SJeff Garzik * Kernel thread context (may sleep) 3531c6fd2807SJeff Garzik * 3532c6fd2807SJeff Garzik * RETURNS: 3533c6fd2807SJeff Garzik * 0 on success, -errno otherwise. 3534c6fd2807SJeff Garzik */ 3535cc0680a5STejun Heo int ata_std_softreset(struct ata_link *link, unsigned int *classes, 3536d4b2bab4STejun Heo unsigned long deadline) 3537c6fd2807SJeff Garzik { 3538cc0680a5STejun Heo struct ata_port *ap = link->ap; 3539c6fd2807SJeff Garzik unsigned int slave_possible = ap->flags & ATA_FLAG_SLAVE_POSS; 3540d4b2bab4STejun Heo unsigned int devmask = 0; 3541d4b2bab4STejun Heo int rc; 3542c6fd2807SJeff Garzik u8 err; 3543c6fd2807SJeff Garzik 3544c6fd2807SJeff Garzik DPRINTK("ENTER\n"); 3545c6fd2807SJeff Garzik 3546936fd732STejun Heo if (ata_link_offline(link)) { 3547c6fd2807SJeff Garzik classes[0] = ATA_DEV_NONE; 3548c6fd2807SJeff Garzik goto out; 3549c6fd2807SJeff Garzik } 3550c6fd2807SJeff Garzik 3551c6fd2807SJeff Garzik /* determine if device 0/1 are present */ 3552c6fd2807SJeff Garzik if (ata_devchk(ap, 0)) 3553c6fd2807SJeff Garzik devmask |= (1 << 0); 3554c6fd2807SJeff Garzik if (slave_possible && ata_devchk(ap, 1)) 3555c6fd2807SJeff Garzik devmask |= (1 << 1); 3556c6fd2807SJeff Garzik 3557c6fd2807SJeff Garzik /* select device 0 again */ 3558c6fd2807SJeff Garzik ap->ops->dev_select(ap, 0); 3559c6fd2807SJeff Garzik 3560c6fd2807SJeff Garzik /* issue bus reset */ 3561c6fd2807SJeff Garzik DPRINTK("about to softreset, devmask=%x\n", devmask); 3562d4b2bab4STejun Heo rc = ata_bus_softreset(ap, devmask, deadline); 35639b89391cSTejun Heo /* if link is occupied, -ENODEV too is an error */ 3564936fd732STejun Heo if (rc && (rc != -ENODEV || sata_scr_valid(link))) { 3565cc0680a5STejun Heo ata_link_printk(link, KERN_ERR, "SRST failed (errno=%d)\n", rc); 3566d4b2bab4STejun Heo return rc; 3567c6fd2807SJeff Garzik } 3568c6fd2807SJeff Garzik 3569c6fd2807SJeff Garzik /* determine by signature whether we have ATA or ATAPI devices */ 35703f19859eSTejun Heo classes[0] = ata_dev_try_classify(&link->device[0], 35713f19859eSTejun Heo devmask & (1 << 0), &err); 3572c6fd2807SJeff Garzik if (slave_possible && err != 0x81) 35733f19859eSTejun Heo classes[1] = ata_dev_try_classify(&link->device[1], 35743f19859eSTejun Heo devmask & (1 << 1), &err); 3575c6fd2807SJeff Garzik 3576c6fd2807SJeff Garzik out: 3577c6fd2807SJeff Garzik DPRINTK("EXIT, classes[0]=%u [1]=%u\n", classes[0], classes[1]); 3578c6fd2807SJeff Garzik return 0; 3579c6fd2807SJeff Garzik } 3580c6fd2807SJeff Garzik 3581c6fd2807SJeff Garzik /** 3582cc0680a5STejun Heo * sata_link_hardreset - reset link via SATA phy reset 3583cc0680a5STejun Heo * @link: link to reset 3584b6103f6dSTejun Heo * @timing: timing parameters { interval, duratinon, timeout } in msec 3585d4b2bab4STejun Heo * @deadline: deadline jiffies for the operation 3586c6fd2807SJeff Garzik * 3587cc0680a5STejun Heo * SATA phy-reset @link using DET bits of SControl register. 3588c6fd2807SJeff Garzik * 3589c6fd2807SJeff Garzik * LOCKING: 3590c6fd2807SJeff Garzik * Kernel thread context (may sleep) 3591c6fd2807SJeff Garzik * 3592c6fd2807SJeff Garzik * RETURNS: 3593c6fd2807SJeff Garzik * 0 on success, -errno otherwise. 3594c6fd2807SJeff Garzik */ 3595cc0680a5STejun Heo int sata_link_hardreset(struct ata_link *link, const unsigned long *timing, 3596d4b2bab4STejun Heo unsigned long deadline) 3597c6fd2807SJeff Garzik { 3598c6fd2807SJeff Garzik u32 scontrol; 3599c6fd2807SJeff Garzik int rc; 3600c6fd2807SJeff Garzik 3601c6fd2807SJeff Garzik DPRINTK("ENTER\n"); 3602c6fd2807SJeff Garzik 3603936fd732STejun Heo if (sata_set_spd_needed(link)) { 3604c6fd2807SJeff Garzik /* SATA spec says nothing about how to reconfigure 3605c6fd2807SJeff Garzik * spd. To be on the safe side, turn off phy during 3606c6fd2807SJeff Garzik * reconfiguration. This works for at least ICH7 AHCI 3607c6fd2807SJeff Garzik * and Sil3124. 3608c6fd2807SJeff Garzik */ 3609936fd732STejun Heo if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol))) 3610b6103f6dSTejun Heo goto out; 3611c6fd2807SJeff Garzik 3612cea0d336SJeff Garzik scontrol = (scontrol & 0x0f0) | 0x304; 3613c6fd2807SJeff Garzik 3614936fd732STejun Heo if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol))) 3615b6103f6dSTejun Heo goto out; 3616c6fd2807SJeff Garzik 3617936fd732STejun Heo sata_set_spd(link); 3618c6fd2807SJeff Garzik } 3619c6fd2807SJeff Garzik 3620c6fd2807SJeff Garzik /* issue phy wake/reset */ 3621936fd732STejun Heo if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol))) 3622b6103f6dSTejun Heo goto out; 3623c6fd2807SJeff Garzik 3624c6fd2807SJeff Garzik scontrol = (scontrol & 0x0f0) | 0x301; 3625c6fd2807SJeff Garzik 3626936fd732STejun Heo if ((rc = sata_scr_write_flush(link, SCR_CONTROL, scontrol))) 3627b6103f6dSTejun Heo goto out; 3628c6fd2807SJeff Garzik 3629c6fd2807SJeff Garzik /* Couldn't find anything in SATA I/II specs, but AHCI-1.1 3630c6fd2807SJeff Garzik * 10.4.2 says at least 1 ms. 3631c6fd2807SJeff Garzik */ 3632c6fd2807SJeff Garzik msleep(1); 3633c6fd2807SJeff Garzik 3634936fd732STejun Heo /* bring link back */ 3635936fd732STejun Heo rc = sata_link_resume(link, timing, deadline); 3636b6103f6dSTejun Heo out: 3637b6103f6dSTejun Heo DPRINTK("EXIT, rc=%d\n", rc); 3638b6103f6dSTejun Heo return rc; 3639b6103f6dSTejun Heo } 3640b6103f6dSTejun Heo 3641b6103f6dSTejun Heo /** 3642b6103f6dSTejun Heo * sata_std_hardreset - reset host port via SATA phy reset 3643cc0680a5STejun Heo * @link: link to reset 3644b6103f6dSTejun Heo * @class: resulting class of attached device 3645d4b2bab4STejun Heo * @deadline: deadline jiffies for the operation 3646b6103f6dSTejun Heo * 3647b6103f6dSTejun Heo * SATA phy-reset host port using DET bits of SControl register, 3648b6103f6dSTejun Heo * wait for !BSY and classify the attached device. 3649b6103f6dSTejun Heo * 3650b6103f6dSTejun Heo * LOCKING: 3651b6103f6dSTejun Heo * Kernel thread context (may sleep) 3652b6103f6dSTejun Heo * 3653b6103f6dSTejun Heo * RETURNS: 3654b6103f6dSTejun Heo * 0 on success, -errno otherwise. 3655b6103f6dSTejun Heo */ 3656cc0680a5STejun Heo int sata_std_hardreset(struct ata_link *link, unsigned int *class, 3657d4b2bab4STejun Heo unsigned long deadline) 3658b6103f6dSTejun Heo { 3659cc0680a5STejun Heo struct ata_port *ap = link->ap; 3660936fd732STejun Heo const unsigned long *timing = sata_ehc_deb_timing(&link->eh_context); 3661b6103f6dSTejun Heo int rc; 3662b6103f6dSTejun Heo 3663b6103f6dSTejun Heo DPRINTK("ENTER\n"); 3664b6103f6dSTejun Heo 3665b6103f6dSTejun Heo /* do hardreset */ 3666cc0680a5STejun Heo rc = sata_link_hardreset(link, timing, deadline); 3667b6103f6dSTejun Heo if (rc) { 3668cc0680a5STejun Heo ata_link_printk(link, KERN_ERR, 3669b6103f6dSTejun Heo "COMRESET failed (errno=%d)\n", rc); 3670b6103f6dSTejun Heo return rc; 3671b6103f6dSTejun Heo } 3672c6fd2807SJeff Garzik 3673c6fd2807SJeff Garzik /* TODO: phy layer with polling, timeouts, etc. */ 3674936fd732STejun Heo if (ata_link_offline(link)) { 3675c6fd2807SJeff Garzik *class = ATA_DEV_NONE; 3676c6fd2807SJeff Garzik DPRINTK("EXIT, link offline\n"); 3677c6fd2807SJeff Garzik return 0; 3678c6fd2807SJeff Garzik } 3679c6fd2807SJeff Garzik 368034fee227STejun Heo /* wait a while before checking status, see SRST for more info */ 368134fee227STejun Heo msleep(150); 368234fee227STejun Heo 3683633273a3STejun Heo /* If PMP is supported, we have to do follow-up SRST. Note 3684633273a3STejun Heo * that some PMPs don't send D2H Reg FIS after hardreset at 3685633273a3STejun Heo * all if the first port is empty. Wait for it just for a 3686633273a3STejun Heo * second and request follow-up SRST. 3687633273a3STejun Heo */ 3688633273a3STejun Heo if (ap->flags & ATA_FLAG_PMP) { 3689633273a3STejun Heo ata_wait_ready(ap, jiffies + HZ); 3690633273a3STejun Heo return -EAGAIN; 3691633273a3STejun Heo } 3692633273a3STejun Heo 3693d4b2bab4STejun Heo rc = ata_wait_ready(ap, deadline); 36949b89391cSTejun Heo /* link occupied, -ENODEV too is an error */ 36959b89391cSTejun Heo if (rc) { 3696cc0680a5STejun Heo ata_link_printk(link, KERN_ERR, 3697d4b2bab4STejun Heo "COMRESET failed (errno=%d)\n", rc); 3698d4b2bab4STejun Heo return rc; 3699c6fd2807SJeff Garzik } 3700c6fd2807SJeff Garzik 3701c6fd2807SJeff Garzik ap->ops->dev_select(ap, 0); /* probably unnecessary */ 3702c6fd2807SJeff Garzik 37033f19859eSTejun Heo *class = ata_dev_try_classify(link->device, 1, NULL); 3704c6fd2807SJeff Garzik 3705c6fd2807SJeff Garzik DPRINTK("EXIT, class=%u\n", *class); 3706c6fd2807SJeff Garzik return 0; 3707c6fd2807SJeff Garzik } 3708c6fd2807SJeff Garzik 3709c6fd2807SJeff Garzik /** 3710c6fd2807SJeff Garzik * ata_std_postreset - standard postreset callback 3711cc0680a5STejun Heo * @link: the target ata_link 3712c6fd2807SJeff Garzik * @classes: classes of attached devices 3713c6fd2807SJeff Garzik * 3714c6fd2807SJeff Garzik * This function is invoked after a successful reset. Note that 3715c6fd2807SJeff Garzik * the device might have been reset more than once using 3716c6fd2807SJeff Garzik * different reset methods before postreset is invoked. 3717c6fd2807SJeff Garzik * 3718c6fd2807SJeff Garzik * LOCKING: 3719c6fd2807SJeff Garzik * Kernel thread context (may sleep) 3720c6fd2807SJeff Garzik */ 3721cc0680a5STejun Heo void ata_std_postreset(struct ata_link *link, unsigned int *classes) 3722c6fd2807SJeff Garzik { 3723cc0680a5STejun Heo struct ata_port *ap = link->ap; 3724c6fd2807SJeff Garzik u32 serror; 3725c6fd2807SJeff Garzik 3726c6fd2807SJeff Garzik DPRINTK("ENTER\n"); 3727c6fd2807SJeff Garzik 3728c6fd2807SJeff Garzik /* print link status */ 3729936fd732STejun Heo sata_print_link_status(link); 3730c6fd2807SJeff Garzik 3731c6fd2807SJeff Garzik /* clear SError */ 3732936fd732STejun Heo if (sata_scr_read(link, SCR_ERROR, &serror) == 0) 3733936fd732STejun Heo sata_scr_write(link, SCR_ERROR, serror); 3734c6fd2807SJeff Garzik 3735c6fd2807SJeff Garzik /* is double-select really necessary? */ 3736c6fd2807SJeff Garzik if (classes[0] != ATA_DEV_NONE) 3737c6fd2807SJeff Garzik ap->ops->dev_select(ap, 1); 3738c6fd2807SJeff Garzik if (classes[1] != ATA_DEV_NONE) 3739c6fd2807SJeff Garzik ap->ops->dev_select(ap, 0); 3740c6fd2807SJeff Garzik 3741c6fd2807SJeff Garzik /* bail out if no device is present */ 3742c6fd2807SJeff Garzik if (classes[0] == ATA_DEV_NONE && classes[1] == ATA_DEV_NONE) { 3743c6fd2807SJeff Garzik DPRINTK("EXIT, no device\n"); 3744c6fd2807SJeff Garzik return; 3745c6fd2807SJeff Garzik } 3746c6fd2807SJeff Garzik 3747c6fd2807SJeff Garzik /* set up device control */ 37480d5ff566STejun Heo if (ap->ioaddr.ctl_addr) 37490d5ff566STejun Heo iowrite8(ap->ctl, ap->ioaddr.ctl_addr); 3750c6fd2807SJeff Garzik 3751c6fd2807SJeff Garzik DPRINTK("EXIT\n"); 3752c6fd2807SJeff Garzik } 3753c6fd2807SJeff Garzik 3754c6fd2807SJeff Garzik /** 3755c6fd2807SJeff Garzik * ata_dev_same_device - Determine whether new ID matches configured device 3756c6fd2807SJeff Garzik * @dev: device to compare against 3757c6fd2807SJeff Garzik * @new_class: class of the new device 3758c6fd2807SJeff Garzik * @new_id: IDENTIFY page of the new device 3759c6fd2807SJeff Garzik * 3760c6fd2807SJeff Garzik * Compare @new_class and @new_id against @dev and determine 3761c6fd2807SJeff Garzik * whether @dev is the device indicated by @new_class and 3762c6fd2807SJeff Garzik * @new_id. 3763c6fd2807SJeff Garzik * 3764c6fd2807SJeff Garzik * LOCKING: 3765c6fd2807SJeff Garzik * None. 3766c6fd2807SJeff Garzik * 3767c6fd2807SJeff Garzik * RETURNS: 3768c6fd2807SJeff Garzik * 1 if @dev matches @new_class and @new_id, 0 otherwise. 3769c6fd2807SJeff Garzik */ 3770c6fd2807SJeff Garzik static int ata_dev_same_device(struct ata_device *dev, unsigned int new_class, 3771c6fd2807SJeff Garzik const u16 *new_id) 3772c6fd2807SJeff Garzik { 3773c6fd2807SJeff Garzik const u16 *old_id = dev->id; 3774a0cf733bSTejun Heo unsigned char model[2][ATA_ID_PROD_LEN + 1]; 3775a0cf733bSTejun Heo unsigned char serial[2][ATA_ID_SERNO_LEN + 1]; 3776c6fd2807SJeff Garzik 3777c6fd2807SJeff Garzik if (dev->class != new_class) { 3778c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_INFO, "class mismatch %d != %d\n", 3779c6fd2807SJeff Garzik dev->class, new_class); 3780c6fd2807SJeff Garzik return 0; 3781c6fd2807SJeff Garzik } 3782c6fd2807SJeff Garzik 3783a0cf733bSTejun Heo ata_id_c_string(old_id, model[0], ATA_ID_PROD, sizeof(model[0])); 3784a0cf733bSTejun Heo ata_id_c_string(new_id, model[1], ATA_ID_PROD, sizeof(model[1])); 3785a0cf733bSTejun Heo ata_id_c_string(old_id, serial[0], ATA_ID_SERNO, sizeof(serial[0])); 3786a0cf733bSTejun Heo ata_id_c_string(new_id, serial[1], ATA_ID_SERNO, sizeof(serial[1])); 3787c6fd2807SJeff Garzik 3788c6fd2807SJeff Garzik if (strcmp(model[0], model[1])) { 3789c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_INFO, "model number mismatch " 3790c6fd2807SJeff Garzik "'%s' != '%s'\n", model[0], model[1]); 3791c6fd2807SJeff Garzik return 0; 3792c6fd2807SJeff Garzik } 3793c6fd2807SJeff Garzik 3794c6fd2807SJeff Garzik if (strcmp(serial[0], serial[1])) { 3795c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_INFO, "serial number mismatch " 3796c6fd2807SJeff Garzik "'%s' != '%s'\n", serial[0], serial[1]); 3797c6fd2807SJeff Garzik return 0; 3798c6fd2807SJeff Garzik } 3799c6fd2807SJeff Garzik 3800c6fd2807SJeff Garzik return 1; 3801c6fd2807SJeff Garzik } 3802c6fd2807SJeff Garzik 3803c6fd2807SJeff Garzik /** 3804fe30911bSTejun Heo * ata_dev_reread_id - Re-read IDENTIFY data 38053fae450cSHenrik Kretzschmar * @dev: target ATA device 3806bff04647STejun Heo * @readid_flags: read ID flags 3807c6fd2807SJeff Garzik * 3808c6fd2807SJeff Garzik * Re-read IDENTIFY page and make sure @dev is still attached to 3809c6fd2807SJeff Garzik * the port. 3810c6fd2807SJeff Garzik * 3811c6fd2807SJeff Garzik * LOCKING: 3812c6fd2807SJeff Garzik * Kernel thread context (may sleep) 3813c6fd2807SJeff Garzik * 3814c6fd2807SJeff Garzik * RETURNS: 3815c6fd2807SJeff Garzik * 0 on success, negative errno otherwise 3816c6fd2807SJeff Garzik */ 3817fe30911bSTejun Heo int ata_dev_reread_id(struct ata_device *dev, unsigned int readid_flags) 3818c6fd2807SJeff Garzik { 3819c6fd2807SJeff Garzik unsigned int class = dev->class; 38209af5c9c9STejun Heo u16 *id = (void *)dev->link->ap->sector_buf; 3821c6fd2807SJeff Garzik int rc; 3822c6fd2807SJeff Garzik 3823c6fd2807SJeff Garzik /* read ID data */ 3824bff04647STejun Heo rc = ata_dev_read_id(dev, &class, readid_flags, id); 3825c6fd2807SJeff Garzik if (rc) 3826fe30911bSTejun Heo return rc; 3827c6fd2807SJeff Garzik 3828c6fd2807SJeff Garzik /* is the device still there? */ 3829fe30911bSTejun Heo if (!ata_dev_same_device(dev, class, id)) 3830fe30911bSTejun Heo return -ENODEV; 3831c6fd2807SJeff Garzik 3832c6fd2807SJeff Garzik memcpy(dev->id, id, sizeof(id[0]) * ATA_ID_WORDS); 3833fe30911bSTejun Heo return 0; 3834fe30911bSTejun Heo } 3835fe30911bSTejun Heo 3836fe30911bSTejun Heo /** 3837fe30911bSTejun Heo * ata_dev_revalidate - Revalidate ATA device 3838fe30911bSTejun Heo * @dev: device to revalidate 3839422c9daaSTejun Heo * @new_class: new class code 3840fe30911bSTejun Heo * @readid_flags: read ID flags 3841fe30911bSTejun Heo * 3842fe30911bSTejun Heo * Re-read IDENTIFY page, make sure @dev is still attached to the 3843fe30911bSTejun Heo * port and reconfigure it according to the new IDENTIFY page. 3844fe30911bSTejun Heo * 3845fe30911bSTejun Heo * LOCKING: 3846fe30911bSTejun Heo * Kernel thread context (may sleep) 3847fe30911bSTejun Heo * 3848fe30911bSTejun Heo * RETURNS: 3849fe30911bSTejun Heo * 0 on success, negative errno otherwise 3850fe30911bSTejun Heo */ 3851422c9daaSTejun Heo int ata_dev_revalidate(struct ata_device *dev, unsigned int new_class, 3852422c9daaSTejun Heo unsigned int readid_flags) 3853fe30911bSTejun Heo { 38546ddcd3b0STejun Heo u64 n_sectors = dev->n_sectors; 3855fe30911bSTejun Heo int rc; 3856fe30911bSTejun Heo 3857fe30911bSTejun Heo if (!ata_dev_enabled(dev)) 3858fe30911bSTejun Heo return -ENODEV; 3859fe30911bSTejun Heo 3860422c9daaSTejun Heo /* fail early if !ATA && !ATAPI to avoid issuing [P]IDENTIFY to PMP */ 3861422c9daaSTejun Heo if (ata_class_enabled(new_class) && 3862422c9daaSTejun Heo new_class != ATA_DEV_ATA && new_class != ATA_DEV_ATAPI) { 3863422c9daaSTejun Heo ata_dev_printk(dev, KERN_INFO, "class mismatch %u != %u\n", 3864422c9daaSTejun Heo dev->class, new_class); 3865422c9daaSTejun Heo rc = -ENODEV; 3866422c9daaSTejun Heo goto fail; 3867422c9daaSTejun Heo } 3868422c9daaSTejun Heo 3869fe30911bSTejun Heo /* re-read ID */ 3870fe30911bSTejun Heo rc = ata_dev_reread_id(dev, readid_flags); 3871fe30911bSTejun Heo if (rc) 3872fe30911bSTejun Heo goto fail; 3873c6fd2807SJeff Garzik 3874c6fd2807SJeff Garzik /* configure device according to the new ID */ 3875efdaedc4STejun Heo rc = ata_dev_configure(dev); 38766ddcd3b0STejun Heo if (rc) 38776ddcd3b0STejun Heo goto fail; 38786ddcd3b0STejun Heo 38796ddcd3b0STejun Heo /* verify n_sectors hasn't changed */ 3880b54eebd6STejun Heo if (dev->class == ATA_DEV_ATA && n_sectors && 3881b54eebd6STejun Heo dev->n_sectors != n_sectors) { 38826ddcd3b0STejun Heo ata_dev_printk(dev, KERN_INFO, "n_sectors mismatch " 38836ddcd3b0STejun Heo "%llu != %llu\n", 38846ddcd3b0STejun Heo (unsigned long long)n_sectors, 38856ddcd3b0STejun Heo (unsigned long long)dev->n_sectors); 38868270bec4STejun Heo 38878270bec4STejun Heo /* restore original n_sectors */ 38888270bec4STejun Heo dev->n_sectors = n_sectors; 38898270bec4STejun Heo 38906ddcd3b0STejun Heo rc = -ENODEV; 38916ddcd3b0STejun Heo goto fail; 38926ddcd3b0STejun Heo } 38936ddcd3b0STejun Heo 3894c6fd2807SJeff Garzik return 0; 3895c6fd2807SJeff Garzik 3896c6fd2807SJeff Garzik fail: 3897c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_ERR, "revalidation failed (errno=%d)\n", rc); 3898c6fd2807SJeff Garzik return rc; 3899c6fd2807SJeff Garzik } 3900c6fd2807SJeff Garzik 39016919a0a6SAlan Cox struct ata_blacklist_entry { 39026919a0a6SAlan Cox const char *model_num; 39036919a0a6SAlan Cox const char *model_rev; 39046919a0a6SAlan Cox unsigned long horkage; 39056919a0a6SAlan Cox }; 39066919a0a6SAlan Cox 39076919a0a6SAlan Cox static const struct ata_blacklist_entry ata_device_blacklist [] = { 39086919a0a6SAlan Cox /* Devices with DMA related problems under Linux */ 39096919a0a6SAlan Cox { "WDC AC11000H", NULL, ATA_HORKAGE_NODMA }, 39106919a0a6SAlan Cox { "WDC AC22100H", NULL, ATA_HORKAGE_NODMA }, 39116919a0a6SAlan Cox { "WDC AC32500H", NULL, ATA_HORKAGE_NODMA }, 39126919a0a6SAlan Cox { "WDC AC33100H", NULL, ATA_HORKAGE_NODMA }, 39136919a0a6SAlan Cox { "WDC AC31600H", NULL, ATA_HORKAGE_NODMA }, 39146919a0a6SAlan Cox { "WDC AC32100H", "24.09P07", ATA_HORKAGE_NODMA }, 39156919a0a6SAlan Cox { "WDC AC23200L", "21.10N21", ATA_HORKAGE_NODMA }, 39166919a0a6SAlan Cox { "Compaq CRD-8241B", NULL, ATA_HORKAGE_NODMA }, 39176919a0a6SAlan Cox { "CRD-8400B", NULL, ATA_HORKAGE_NODMA }, 39186919a0a6SAlan Cox { "CRD-8480B", NULL, ATA_HORKAGE_NODMA }, 39196919a0a6SAlan Cox { "CRD-8482B", NULL, ATA_HORKAGE_NODMA }, 39206919a0a6SAlan Cox { "CRD-84", NULL, ATA_HORKAGE_NODMA }, 39216919a0a6SAlan Cox { "SanDisk SDP3B", NULL, ATA_HORKAGE_NODMA }, 39226919a0a6SAlan Cox { "SanDisk SDP3B-64", NULL, ATA_HORKAGE_NODMA }, 39236919a0a6SAlan Cox { "SANYO CD-ROM CRD", NULL, ATA_HORKAGE_NODMA }, 39246919a0a6SAlan Cox { "HITACHI CDR-8", NULL, ATA_HORKAGE_NODMA }, 39256919a0a6SAlan Cox { "HITACHI CDR-8335", NULL, ATA_HORKAGE_NODMA }, 39266919a0a6SAlan Cox { "HITACHI CDR-8435", NULL, ATA_HORKAGE_NODMA }, 39276919a0a6SAlan Cox { "Toshiba CD-ROM XM-6202B", NULL, ATA_HORKAGE_NODMA }, 39286919a0a6SAlan Cox { "TOSHIBA CD-ROM XM-1702BC", NULL, ATA_HORKAGE_NODMA }, 39296919a0a6SAlan Cox { "CD-532E-A", NULL, ATA_HORKAGE_NODMA }, 39306919a0a6SAlan Cox { "E-IDE CD-ROM CR-840",NULL, ATA_HORKAGE_NODMA }, 39316919a0a6SAlan Cox { "CD-ROM Drive/F5A", NULL, ATA_HORKAGE_NODMA }, 39326919a0a6SAlan Cox { "WPI CDD-820", NULL, ATA_HORKAGE_NODMA }, 39336919a0a6SAlan Cox { "SAMSUNG CD-ROM SC-148C", NULL, ATA_HORKAGE_NODMA }, 39346919a0a6SAlan Cox { "SAMSUNG CD-ROM SC", NULL, ATA_HORKAGE_NODMA }, 39356919a0a6SAlan Cox { "ATAPI CD-ROM DRIVE 40X MAXIMUM",NULL,ATA_HORKAGE_NODMA }, 39366919a0a6SAlan Cox { "_NEC DV5800A", NULL, ATA_HORKAGE_NODMA }, 39376919a0a6SAlan Cox { "SAMSUNG CD-ROM SN-124","N001", ATA_HORKAGE_NODMA }, 393839f19886SDave Jones { "Seagate STT20000A", NULL, ATA_HORKAGE_NODMA }, 39395acd50f6STejun Heo { "IOMEGA ZIP 250 ATAPI", NULL, ATA_HORKAGE_NODMA }, /* temporary fix */ 394039ce7128STejun Heo { "IOMEGA ZIP 250 ATAPI Floppy", 394139ce7128STejun Heo NULL, ATA_HORKAGE_NODMA }, 39423af9a77aSTejun Heo /* Odd clown on sil3726/4726 PMPs */ 39433af9a77aSTejun Heo { "Config Disk", NULL, ATA_HORKAGE_NODMA | 39443af9a77aSTejun Heo ATA_HORKAGE_SKIP_PM }, 39456919a0a6SAlan Cox 394618d6e9d5SAlbert Lee /* Weird ATAPI devices */ 394740a1d531STejun Heo { "TORiSAN DVD-ROM DRD-N216", NULL, ATA_HORKAGE_MAX_SEC_128 }, 394818d6e9d5SAlbert Lee 39496919a0a6SAlan Cox /* Devices we expect to fail diagnostics */ 39506919a0a6SAlan Cox 39516919a0a6SAlan Cox /* Devices where NCQ should be avoided */ 39526919a0a6SAlan Cox /* NCQ is slow */ 39536919a0a6SAlan Cox { "WDC WD740ADFD-00", NULL, ATA_HORKAGE_NONCQ }, 395409125ea6STejun Heo /* http://thread.gmane.org/gmane.linux.ide/14907 */ 395509125ea6STejun Heo { "FUJITSU MHT2060BH", NULL, ATA_HORKAGE_NONCQ }, 39567acfaf30SPaul Rolland /* NCQ is broken */ 3957539cc7c7SJeff Garzik { "Maxtor *", "BANC*", ATA_HORKAGE_NONCQ }, 39580e3dbc01SAlan Cox { "Maxtor 7V300F0", "VA111630", ATA_HORKAGE_NONCQ }, 39590b0a43e0SDavid Milburn { "HITACHI HDS7250SASUN500G*", NULL, ATA_HORKAGE_NONCQ }, 39600b0a43e0SDavid Milburn { "HITACHI HDS7225SBSUN250G*", NULL, ATA_HORKAGE_NONCQ }, 3961539cc7c7SJeff Garzik 396236e337d0SRobert Hancock /* Blacklist entries taken from Silicon Image 3124/3132 396336e337d0SRobert Hancock Windows driver .inf file - also several Linux problem reports */ 396436e337d0SRobert Hancock { "HTS541060G9SA00", "MB3OC60D", ATA_HORKAGE_NONCQ, }, 396536e337d0SRobert Hancock { "HTS541080G9SA00", "MB4OC60D", ATA_HORKAGE_NONCQ, }, 396636e337d0SRobert Hancock { "HTS541010G9SA00", "MBZOC60D", ATA_HORKAGE_NONCQ, }, 3967bd9c5a39STejun Heo /* Drives which do spurious command completion */ 3968bd9c5a39STejun Heo { "HTS541680J9SA00", "SB2IC7EP", ATA_HORKAGE_NONCQ, }, 39692f8fcebbSTejun Heo { "HTS541612J9SA00", "SBDIC7JP", ATA_HORKAGE_NONCQ, }, 3970e14cbfa6STejun Heo { "Hitachi HTS541616J9SA00", "SB4OC70P", ATA_HORKAGE_NONCQ, }, 39712f8fcebbSTejun Heo { "WDC WD740ADFD-00NLR1", NULL, ATA_HORKAGE_NONCQ, }, 39727f567620STejun Heo { "WDC WD3200AAJS-00RYA0", "12.01B01", ATA_HORKAGE_NONCQ, }, 3973a520f261STejun Heo { "FUJITSU MHV2080BH", "00840028", ATA_HORKAGE_NONCQ, }, 39747f567620STejun Heo { "ST9120822AS", "3.CLF", ATA_HORKAGE_NONCQ, }, 39753fb6589cSTejun Heo { "ST9160821AS", "3.CLF", ATA_HORKAGE_NONCQ, }, 39767f567620STejun Heo { "ST3160812AS", "3.ADJ", ATA_HORKAGE_NONCQ, }, 39777f567620STejun Heo { "ST980813AS", "3.ADB", ATA_HORKAGE_NONCQ, }, 39785d6aca8dSTejun Heo { "SAMSUNG HD401LJ", "ZZ100-15", ATA_HORKAGE_NONCQ, }, 39796919a0a6SAlan Cox 398016c55b03STejun Heo /* devices which puke on READ_NATIVE_MAX */ 398116c55b03STejun Heo { "HDS724040KLSA80", "KFAOA20N", ATA_HORKAGE_BROKEN_HPA, }, 398216c55b03STejun Heo { "WDC WD3200JD-00KLB0", "WD-WCAMR1130137", ATA_HORKAGE_BROKEN_HPA }, 398316c55b03STejun Heo { "WDC WD2500JD-00HBB0", "WD-WMAL71490727", ATA_HORKAGE_BROKEN_HPA }, 398416c55b03STejun Heo { "MAXTOR 6L080L4", "A93.0500", ATA_HORKAGE_BROKEN_HPA }, 39856919a0a6SAlan Cox 398693328e11SAlan Cox /* Devices which report 1 sector over size HPA */ 398793328e11SAlan Cox { "ST340823A", NULL, ATA_HORKAGE_HPA_SIZE, }, 398893328e11SAlan Cox { "ST320413A", NULL, ATA_HORKAGE_HPA_SIZE, }, 398993328e11SAlan Cox 39906919a0a6SAlan Cox /* End Marker */ 39916919a0a6SAlan Cox { } 3992c6fd2807SJeff Garzik }; 3993c6fd2807SJeff Garzik 3994539cc7c7SJeff Garzik int strn_pattern_cmp(const char *patt, const char *name, int wildchar) 3995539cc7c7SJeff Garzik { 3996539cc7c7SJeff Garzik const char *p; 3997539cc7c7SJeff Garzik int len; 3998539cc7c7SJeff Garzik 3999539cc7c7SJeff Garzik /* 4000539cc7c7SJeff Garzik * check for trailing wildcard: *\0 4001539cc7c7SJeff Garzik */ 4002539cc7c7SJeff Garzik p = strchr(patt, wildchar); 4003539cc7c7SJeff Garzik if (p && ((*(p + 1)) == 0)) 4004539cc7c7SJeff Garzik len = p - patt; 4005539cc7c7SJeff Garzik else 4006539cc7c7SJeff Garzik len = strlen(name); 4007539cc7c7SJeff Garzik 4008539cc7c7SJeff Garzik return strncmp(patt, name, len); 4009539cc7c7SJeff Garzik } 4010539cc7c7SJeff Garzik 401175683fe7STejun Heo static unsigned long ata_dev_blacklisted(const struct ata_device *dev) 4012c6fd2807SJeff Garzik { 40138bfa79fcSTejun Heo unsigned char model_num[ATA_ID_PROD_LEN + 1]; 40148bfa79fcSTejun Heo unsigned char model_rev[ATA_ID_FW_REV_LEN + 1]; 40156919a0a6SAlan Cox const struct ata_blacklist_entry *ad = ata_device_blacklist; 4016c6fd2807SJeff Garzik 40178bfa79fcSTejun Heo ata_id_c_string(dev->id, model_num, ATA_ID_PROD, sizeof(model_num)); 40188bfa79fcSTejun Heo ata_id_c_string(dev->id, model_rev, ATA_ID_FW_REV, sizeof(model_rev)); 4019c6fd2807SJeff Garzik 40206919a0a6SAlan Cox while (ad->model_num) { 4021539cc7c7SJeff Garzik if (!strn_pattern_cmp(ad->model_num, model_num, '*')) { 40226919a0a6SAlan Cox if (ad->model_rev == NULL) 40236919a0a6SAlan Cox return ad->horkage; 4024539cc7c7SJeff Garzik if (!strn_pattern_cmp(ad->model_rev, model_rev, '*')) 40256919a0a6SAlan Cox return ad->horkage; 4026c6fd2807SJeff Garzik } 40276919a0a6SAlan Cox ad++; 4028c6fd2807SJeff Garzik } 4029c6fd2807SJeff Garzik return 0; 4030c6fd2807SJeff Garzik } 4031c6fd2807SJeff Garzik 40326919a0a6SAlan Cox static int ata_dma_blacklisted(const struct ata_device *dev) 40336919a0a6SAlan Cox { 40346919a0a6SAlan Cox /* We don't support polling DMA. 40356919a0a6SAlan Cox * DMA blacklist those ATAPI devices with CDB-intr (and use PIO) 40366919a0a6SAlan Cox * if the LLDD handles only interrupts in the HSM_ST_LAST state. 40376919a0a6SAlan Cox */ 40389af5c9c9STejun Heo if ((dev->link->ap->flags & ATA_FLAG_PIO_POLLING) && 40396919a0a6SAlan Cox (dev->flags & ATA_DFLAG_CDB_INTR)) 40406919a0a6SAlan Cox return 1; 404175683fe7STejun Heo return (dev->horkage & ATA_HORKAGE_NODMA) ? 1 : 0; 40426919a0a6SAlan Cox } 40436919a0a6SAlan Cox 4044c6fd2807SJeff Garzik /** 4045c6fd2807SJeff Garzik * ata_dev_xfermask - Compute supported xfermask of the given device 4046c6fd2807SJeff Garzik * @dev: Device to compute xfermask for 4047c6fd2807SJeff Garzik * 4048c6fd2807SJeff Garzik * Compute supported xfermask of @dev and store it in 4049c6fd2807SJeff Garzik * dev->*_mask. This function is responsible for applying all 4050c6fd2807SJeff Garzik * known limits including host controller limits, device 4051c6fd2807SJeff Garzik * blacklist, etc... 4052c6fd2807SJeff Garzik * 4053c6fd2807SJeff Garzik * LOCKING: 4054c6fd2807SJeff Garzik * None. 4055c6fd2807SJeff Garzik */ 4056c6fd2807SJeff Garzik static void ata_dev_xfermask(struct ata_device *dev) 4057c6fd2807SJeff Garzik { 40589af5c9c9STejun Heo struct ata_link *link = dev->link; 40599af5c9c9STejun Heo struct ata_port *ap = link->ap; 4060cca3974eSJeff Garzik struct ata_host *host = ap->host; 4061c6fd2807SJeff Garzik unsigned long xfer_mask; 4062c6fd2807SJeff Garzik 4063c6fd2807SJeff Garzik /* controller modes available */ 4064c6fd2807SJeff Garzik xfer_mask = ata_pack_xfermask(ap->pio_mask, 4065c6fd2807SJeff Garzik ap->mwdma_mask, ap->udma_mask); 4066c6fd2807SJeff Garzik 40678343f889SRobert Hancock /* drive modes available */ 4068c6fd2807SJeff Garzik xfer_mask &= ata_pack_xfermask(dev->pio_mask, 4069c6fd2807SJeff Garzik dev->mwdma_mask, dev->udma_mask); 4070c6fd2807SJeff Garzik xfer_mask &= ata_id_xfermask(dev->id); 4071c6fd2807SJeff Garzik 4072b352e57dSAlan Cox /* 4073b352e57dSAlan Cox * CFA Advanced TrueIDE timings are not allowed on a shared 4074b352e57dSAlan Cox * cable 4075b352e57dSAlan Cox */ 4076b352e57dSAlan Cox if (ata_dev_pair(dev)) { 4077b352e57dSAlan Cox /* No PIO5 or PIO6 */ 4078b352e57dSAlan Cox xfer_mask &= ~(0x03 << (ATA_SHIFT_PIO + 5)); 4079b352e57dSAlan Cox /* No MWDMA3 or MWDMA 4 */ 4080b352e57dSAlan Cox xfer_mask &= ~(0x03 << (ATA_SHIFT_MWDMA + 3)); 4081b352e57dSAlan Cox } 4082b352e57dSAlan Cox 4083c6fd2807SJeff Garzik if (ata_dma_blacklisted(dev)) { 4084c6fd2807SJeff Garzik xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA); 4085c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_WARNING, 4086c6fd2807SJeff Garzik "device is on DMA blacklist, disabling DMA\n"); 4087c6fd2807SJeff Garzik } 4088c6fd2807SJeff Garzik 408914d66ab7SPetr Vandrovec if ((host->flags & ATA_HOST_SIMPLEX) && 409014d66ab7SPetr Vandrovec host->simplex_claimed && host->simplex_claimed != ap) { 4091c6fd2807SJeff Garzik xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA); 4092c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_WARNING, "simplex DMA is claimed by " 4093c6fd2807SJeff Garzik "other device, disabling DMA\n"); 4094c6fd2807SJeff Garzik } 4095c6fd2807SJeff Garzik 4096e424675fSJeff Garzik if (ap->flags & ATA_FLAG_NO_IORDY) 4097e424675fSJeff Garzik xfer_mask &= ata_pio_mask_no_iordy(dev); 4098e424675fSJeff Garzik 4099c6fd2807SJeff Garzik if (ap->ops->mode_filter) 4100a76b62caSAlan Cox xfer_mask = ap->ops->mode_filter(dev, xfer_mask); 4101c6fd2807SJeff Garzik 41028343f889SRobert Hancock /* Apply cable rule here. Don't apply it early because when 41038343f889SRobert Hancock * we handle hot plug the cable type can itself change. 41048343f889SRobert Hancock * Check this last so that we know if the transfer rate was 41058343f889SRobert Hancock * solely limited by the cable. 41068343f889SRobert Hancock * Unknown or 80 wire cables reported host side are checked 41078343f889SRobert Hancock * drive side as well. Cases where we know a 40wire cable 41088343f889SRobert Hancock * is used safely for 80 are not checked here. 41098343f889SRobert Hancock */ 41108343f889SRobert Hancock if (xfer_mask & (0xF8 << ATA_SHIFT_UDMA)) 41118343f889SRobert Hancock /* UDMA/44 or higher would be available */ 41128343f889SRobert Hancock if((ap->cbl == ATA_CBL_PATA40) || 41138343f889SRobert Hancock (ata_drive_40wire(dev->id) && 41148343f889SRobert Hancock (ap->cbl == ATA_CBL_PATA_UNK || 41158343f889SRobert Hancock ap->cbl == ATA_CBL_PATA80))) { 41168343f889SRobert Hancock ata_dev_printk(dev, KERN_WARNING, 41178343f889SRobert Hancock "limited to UDMA/33 due to 40-wire cable\n"); 41188343f889SRobert Hancock xfer_mask &= ~(0xF8 << ATA_SHIFT_UDMA); 41198343f889SRobert Hancock } 41208343f889SRobert Hancock 4121c6fd2807SJeff Garzik ata_unpack_xfermask(xfer_mask, &dev->pio_mask, 4122c6fd2807SJeff Garzik &dev->mwdma_mask, &dev->udma_mask); 4123c6fd2807SJeff Garzik } 4124c6fd2807SJeff Garzik 4125c6fd2807SJeff Garzik /** 4126c6fd2807SJeff Garzik * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command 4127c6fd2807SJeff Garzik * @dev: Device to which command will be sent 4128c6fd2807SJeff Garzik * 4129c6fd2807SJeff Garzik * Issue SET FEATURES - XFER MODE command to device @dev 4130c6fd2807SJeff Garzik * on port @ap. 4131c6fd2807SJeff Garzik * 4132c6fd2807SJeff Garzik * LOCKING: 4133c6fd2807SJeff Garzik * PCI/etc. bus probe sem. 4134c6fd2807SJeff Garzik * 4135c6fd2807SJeff Garzik * RETURNS: 4136c6fd2807SJeff Garzik * 0 on success, AC_ERR_* mask otherwise. 4137c6fd2807SJeff Garzik */ 4138c6fd2807SJeff Garzik 4139c6fd2807SJeff Garzik static unsigned int ata_dev_set_xfermode(struct ata_device *dev) 4140c6fd2807SJeff Garzik { 4141c6fd2807SJeff Garzik struct ata_taskfile tf; 4142c6fd2807SJeff Garzik unsigned int err_mask; 4143c6fd2807SJeff Garzik 4144c6fd2807SJeff Garzik /* set up set-features taskfile */ 4145c6fd2807SJeff Garzik DPRINTK("set features - xfer mode\n"); 4146c6fd2807SJeff Garzik 4147464cf177STejun Heo /* Some controllers and ATAPI devices show flaky interrupt 4148464cf177STejun Heo * behavior after setting xfer mode. Use polling instead. 4149464cf177STejun Heo */ 4150c6fd2807SJeff Garzik ata_tf_init(dev, &tf); 4151c6fd2807SJeff Garzik tf.command = ATA_CMD_SET_FEATURES; 4152c6fd2807SJeff Garzik tf.feature = SETFEATURES_XFER; 4153464cf177STejun Heo tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_POLLING; 4154c6fd2807SJeff Garzik tf.protocol = ATA_PROT_NODATA; 4155c6fd2807SJeff Garzik tf.nsect = dev->xfer_mode; 4156c6fd2807SJeff Garzik 4157c6fd2807SJeff Garzik err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0); 4158c6fd2807SJeff Garzik 4159c6fd2807SJeff Garzik DPRINTK("EXIT, err_mask=%x\n", err_mask); 4160c6fd2807SJeff Garzik return err_mask; 4161c6fd2807SJeff Garzik } 4162c6fd2807SJeff Garzik 4163c6fd2807SJeff Garzik /** 41649f45cbd3SKristen Carlson Accardi * ata_dev_set_AN - Issue SET FEATURES - SATA FEATURES 41659f45cbd3SKristen Carlson Accardi * @dev: Device to which command will be sent 41669f45cbd3SKristen Carlson Accardi * @enable: Whether to enable or disable the feature 41679f45cbd3SKristen Carlson Accardi * 41689f45cbd3SKristen Carlson Accardi * Issue SET FEATURES - SATA FEATURES command to device @dev 41699f45cbd3SKristen Carlson Accardi * on port @ap with sector count set to indicate Asynchronous 41709f45cbd3SKristen Carlson Accardi * Notification feature 41719f45cbd3SKristen Carlson Accardi * 41729f45cbd3SKristen Carlson Accardi * LOCKING: 41739f45cbd3SKristen Carlson Accardi * PCI/etc. bus probe sem. 41749f45cbd3SKristen Carlson Accardi * 41759f45cbd3SKristen Carlson Accardi * RETURNS: 41769f45cbd3SKristen Carlson Accardi * 0 on success, AC_ERR_* mask otherwise. 41779f45cbd3SKristen Carlson Accardi */ 41789f45cbd3SKristen Carlson Accardi static unsigned int ata_dev_set_AN(struct ata_device *dev, u8 enable) 41799f45cbd3SKristen Carlson Accardi { 41809f45cbd3SKristen Carlson Accardi struct ata_taskfile tf; 41819f45cbd3SKristen Carlson Accardi unsigned int err_mask; 41829f45cbd3SKristen Carlson Accardi 41839f45cbd3SKristen Carlson Accardi /* set up set-features taskfile */ 41849f45cbd3SKristen Carlson Accardi DPRINTK("set features - SATA features\n"); 41859f45cbd3SKristen Carlson Accardi 41869f45cbd3SKristen Carlson Accardi ata_tf_init(dev, &tf); 41879f45cbd3SKristen Carlson Accardi tf.command = ATA_CMD_SET_FEATURES; 41889f45cbd3SKristen Carlson Accardi tf.feature = enable; 41899f45cbd3SKristen Carlson Accardi tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 41909f45cbd3SKristen Carlson Accardi tf.protocol = ATA_PROT_NODATA; 41919f45cbd3SKristen Carlson Accardi tf.nsect = SATA_AN; 41929f45cbd3SKristen Carlson Accardi 41939f45cbd3SKristen Carlson Accardi err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0); 41949f45cbd3SKristen Carlson Accardi 41959f45cbd3SKristen Carlson Accardi DPRINTK("EXIT, err_mask=%x\n", err_mask); 41969f45cbd3SKristen Carlson Accardi return err_mask; 41979f45cbd3SKristen Carlson Accardi } 41989f45cbd3SKristen Carlson Accardi 41999f45cbd3SKristen Carlson Accardi /** 4200c6fd2807SJeff Garzik * ata_dev_init_params - Issue INIT DEV PARAMS command 4201c6fd2807SJeff Garzik * @dev: Device to which command will be sent 4202c6fd2807SJeff Garzik * @heads: Number of heads (taskfile parameter) 4203c6fd2807SJeff Garzik * @sectors: Number of sectors (taskfile parameter) 4204c6fd2807SJeff Garzik * 4205c6fd2807SJeff Garzik * LOCKING: 4206c6fd2807SJeff Garzik * Kernel thread context (may sleep) 4207c6fd2807SJeff Garzik * 4208c6fd2807SJeff Garzik * RETURNS: 4209c6fd2807SJeff Garzik * 0 on success, AC_ERR_* mask otherwise. 4210c6fd2807SJeff Garzik */ 4211c6fd2807SJeff Garzik static unsigned int ata_dev_init_params(struct ata_device *dev, 4212c6fd2807SJeff Garzik u16 heads, u16 sectors) 4213c6fd2807SJeff Garzik { 4214c6fd2807SJeff Garzik struct ata_taskfile tf; 4215c6fd2807SJeff Garzik unsigned int err_mask; 4216c6fd2807SJeff Garzik 4217c6fd2807SJeff Garzik /* Number of sectors per track 1-255. Number of heads 1-16 */ 4218c6fd2807SJeff Garzik if (sectors < 1 || sectors > 255 || heads < 1 || heads > 16) 4219c6fd2807SJeff Garzik return AC_ERR_INVALID; 4220c6fd2807SJeff Garzik 4221c6fd2807SJeff Garzik /* set up init dev params taskfile */ 4222c6fd2807SJeff Garzik DPRINTK("init dev params \n"); 4223c6fd2807SJeff Garzik 4224c6fd2807SJeff Garzik ata_tf_init(dev, &tf); 4225c6fd2807SJeff Garzik tf.command = ATA_CMD_INIT_DEV_PARAMS; 4226c6fd2807SJeff Garzik tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 4227c6fd2807SJeff Garzik tf.protocol = ATA_PROT_NODATA; 4228c6fd2807SJeff Garzik tf.nsect = sectors; 4229c6fd2807SJeff Garzik tf.device |= (heads - 1) & 0x0f; /* max head = num. of heads - 1 */ 4230c6fd2807SJeff Garzik 4231c6fd2807SJeff Garzik err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0); 423218b2466cSAlan Cox /* A clean abort indicates an original or just out of spec drive 423318b2466cSAlan Cox and we should continue as we issue the setup based on the 423418b2466cSAlan Cox drive reported working geometry */ 423518b2466cSAlan Cox if (err_mask == AC_ERR_DEV && (tf.feature & ATA_ABORTED)) 423618b2466cSAlan Cox err_mask = 0; 4237c6fd2807SJeff Garzik 4238c6fd2807SJeff Garzik DPRINTK("EXIT, err_mask=%x\n", err_mask); 4239c6fd2807SJeff Garzik return err_mask; 4240c6fd2807SJeff Garzik } 4241c6fd2807SJeff Garzik 4242c6fd2807SJeff Garzik /** 4243c6fd2807SJeff Garzik * ata_sg_clean - Unmap DMA memory associated with command 4244c6fd2807SJeff Garzik * @qc: Command containing DMA memory to be released 4245c6fd2807SJeff Garzik * 4246c6fd2807SJeff Garzik * Unmap all mapped DMA memory associated with this command. 4247c6fd2807SJeff Garzik * 4248c6fd2807SJeff Garzik * LOCKING: 4249cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 4250c6fd2807SJeff Garzik */ 425170e6ad0cSTejun Heo void ata_sg_clean(struct ata_queued_cmd *qc) 4252c6fd2807SJeff Garzik { 4253c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 4254c6fd2807SJeff Garzik struct scatterlist *sg = qc->__sg; 4255c6fd2807SJeff Garzik int dir = qc->dma_dir; 4256c6fd2807SJeff Garzik void *pad_buf = NULL; 4257c6fd2807SJeff Garzik 4258c6fd2807SJeff Garzik WARN_ON(!(qc->flags & ATA_QCFLAG_DMAMAP)); 4259c6fd2807SJeff Garzik WARN_ON(sg == NULL); 4260c6fd2807SJeff Garzik 4261c6fd2807SJeff Garzik if (qc->flags & ATA_QCFLAG_SINGLE) 4262c6fd2807SJeff Garzik WARN_ON(qc->n_elem > 1); 4263c6fd2807SJeff Garzik 4264c6fd2807SJeff Garzik VPRINTK("unmapping %u sg elements\n", qc->n_elem); 4265c6fd2807SJeff Garzik 4266c6fd2807SJeff Garzik /* if we padded the buffer out to 32-bit bound, and data 4267c6fd2807SJeff Garzik * xfer direction is from-device, we must copy from the 4268c6fd2807SJeff Garzik * pad buffer back into the supplied buffer 4269c6fd2807SJeff Garzik */ 4270c6fd2807SJeff Garzik if (qc->pad_len && !(qc->tf.flags & ATA_TFLAG_WRITE)) 4271c6fd2807SJeff Garzik pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ); 4272c6fd2807SJeff Garzik 4273c6fd2807SJeff Garzik if (qc->flags & ATA_QCFLAG_SG) { 4274c6fd2807SJeff Garzik if (qc->n_elem) 4275c6fd2807SJeff Garzik dma_unmap_sg(ap->dev, sg, qc->n_elem, dir); 4276c6fd2807SJeff Garzik /* restore last sg */ 4277c6fd2807SJeff Garzik sg[qc->orig_n_elem - 1].length += qc->pad_len; 4278c6fd2807SJeff Garzik if (pad_buf) { 4279c6fd2807SJeff Garzik struct scatterlist *psg = &qc->pad_sgent; 4280c6fd2807SJeff Garzik void *addr = kmap_atomic(psg->page, KM_IRQ0); 4281c6fd2807SJeff Garzik memcpy(addr + psg->offset, pad_buf, qc->pad_len); 4282c6fd2807SJeff Garzik kunmap_atomic(addr, KM_IRQ0); 4283c6fd2807SJeff Garzik } 4284c6fd2807SJeff Garzik } else { 4285c6fd2807SJeff Garzik if (qc->n_elem) 4286c6fd2807SJeff Garzik dma_unmap_single(ap->dev, 4287c6fd2807SJeff Garzik sg_dma_address(&sg[0]), sg_dma_len(&sg[0]), 4288c6fd2807SJeff Garzik dir); 4289c6fd2807SJeff Garzik /* restore sg */ 4290c6fd2807SJeff Garzik sg->length += qc->pad_len; 4291c6fd2807SJeff Garzik if (pad_buf) 4292c6fd2807SJeff Garzik memcpy(qc->buf_virt + sg->length - qc->pad_len, 4293c6fd2807SJeff Garzik pad_buf, qc->pad_len); 4294c6fd2807SJeff Garzik } 4295c6fd2807SJeff Garzik 4296c6fd2807SJeff Garzik qc->flags &= ~ATA_QCFLAG_DMAMAP; 4297c6fd2807SJeff Garzik qc->__sg = NULL; 4298c6fd2807SJeff Garzik } 4299c6fd2807SJeff Garzik 4300c6fd2807SJeff Garzik /** 4301c6fd2807SJeff Garzik * ata_fill_sg - Fill PCI IDE PRD table 4302c6fd2807SJeff Garzik * @qc: Metadata associated with taskfile to be transferred 4303c6fd2807SJeff Garzik * 4304c6fd2807SJeff Garzik * Fill PCI IDE PRD (scatter-gather) table with segments 4305c6fd2807SJeff Garzik * associated with the current disk command. 4306c6fd2807SJeff Garzik * 4307c6fd2807SJeff Garzik * LOCKING: 4308cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 4309c6fd2807SJeff Garzik * 4310c6fd2807SJeff Garzik */ 4311c6fd2807SJeff Garzik static void ata_fill_sg(struct ata_queued_cmd *qc) 4312c6fd2807SJeff Garzik { 4313c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 4314c6fd2807SJeff Garzik struct scatterlist *sg; 4315c6fd2807SJeff Garzik unsigned int idx; 4316c6fd2807SJeff Garzik 4317c6fd2807SJeff Garzik WARN_ON(qc->__sg == NULL); 4318c6fd2807SJeff Garzik WARN_ON(qc->n_elem == 0 && qc->pad_len == 0); 4319c6fd2807SJeff Garzik 4320c6fd2807SJeff Garzik idx = 0; 4321c6fd2807SJeff Garzik ata_for_each_sg(sg, qc) { 4322c6fd2807SJeff Garzik u32 addr, offset; 4323c6fd2807SJeff Garzik u32 sg_len, len; 4324c6fd2807SJeff Garzik 4325c6fd2807SJeff Garzik /* determine if physical DMA addr spans 64K boundary. 4326c6fd2807SJeff Garzik * Note h/w doesn't support 64-bit, so we unconditionally 4327c6fd2807SJeff Garzik * truncate dma_addr_t to u32. 4328c6fd2807SJeff Garzik */ 4329c6fd2807SJeff Garzik addr = (u32) sg_dma_address(sg); 4330c6fd2807SJeff Garzik sg_len = sg_dma_len(sg); 4331c6fd2807SJeff Garzik 4332c6fd2807SJeff Garzik while (sg_len) { 4333c6fd2807SJeff Garzik offset = addr & 0xffff; 4334c6fd2807SJeff Garzik len = sg_len; 4335c6fd2807SJeff Garzik if ((offset + sg_len) > 0x10000) 4336c6fd2807SJeff Garzik len = 0x10000 - offset; 4337c6fd2807SJeff Garzik 4338c6fd2807SJeff Garzik ap->prd[idx].addr = cpu_to_le32(addr); 4339c6fd2807SJeff Garzik ap->prd[idx].flags_len = cpu_to_le32(len & 0xffff); 4340c6fd2807SJeff Garzik VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", idx, addr, len); 4341c6fd2807SJeff Garzik 4342c6fd2807SJeff Garzik idx++; 4343c6fd2807SJeff Garzik sg_len -= len; 4344c6fd2807SJeff Garzik addr += len; 4345c6fd2807SJeff Garzik } 4346c6fd2807SJeff Garzik } 4347c6fd2807SJeff Garzik 4348c6fd2807SJeff Garzik if (idx) 4349c6fd2807SJeff Garzik ap->prd[idx - 1].flags_len |= cpu_to_le32(ATA_PRD_EOT); 4350c6fd2807SJeff Garzik } 4351b9a4197eSTejun Heo 4352c6fd2807SJeff Garzik /** 4353d26fc955SAlan Cox * ata_fill_sg_dumb - Fill PCI IDE PRD table 4354d26fc955SAlan Cox * @qc: Metadata associated with taskfile to be transferred 4355d26fc955SAlan Cox * 4356d26fc955SAlan Cox * Fill PCI IDE PRD (scatter-gather) table with segments 4357d26fc955SAlan Cox * associated with the current disk command. Perform the fill 4358d26fc955SAlan Cox * so that we avoid writing any length 64K records for 4359d26fc955SAlan Cox * controllers that don't follow the spec. 4360d26fc955SAlan Cox * 4361d26fc955SAlan Cox * LOCKING: 4362d26fc955SAlan Cox * spin_lock_irqsave(host lock) 4363d26fc955SAlan Cox * 4364d26fc955SAlan Cox */ 4365d26fc955SAlan Cox static void ata_fill_sg_dumb(struct ata_queued_cmd *qc) 4366d26fc955SAlan Cox { 4367d26fc955SAlan Cox struct ata_port *ap = qc->ap; 4368d26fc955SAlan Cox struct scatterlist *sg; 4369d26fc955SAlan Cox unsigned int idx; 4370d26fc955SAlan Cox 4371d26fc955SAlan Cox WARN_ON(qc->__sg == NULL); 4372d26fc955SAlan Cox WARN_ON(qc->n_elem == 0 && qc->pad_len == 0); 4373d26fc955SAlan Cox 4374d26fc955SAlan Cox idx = 0; 4375d26fc955SAlan Cox ata_for_each_sg(sg, qc) { 4376d26fc955SAlan Cox u32 addr, offset; 4377d26fc955SAlan Cox u32 sg_len, len, blen; 4378d26fc955SAlan Cox 4379d26fc955SAlan Cox /* determine if physical DMA addr spans 64K boundary. 4380d26fc955SAlan Cox * Note h/w doesn't support 64-bit, so we unconditionally 4381d26fc955SAlan Cox * truncate dma_addr_t to u32. 4382d26fc955SAlan Cox */ 4383d26fc955SAlan Cox addr = (u32) sg_dma_address(sg); 4384d26fc955SAlan Cox sg_len = sg_dma_len(sg); 4385d26fc955SAlan Cox 4386d26fc955SAlan Cox while (sg_len) { 4387d26fc955SAlan Cox offset = addr & 0xffff; 4388d26fc955SAlan Cox len = sg_len; 4389d26fc955SAlan Cox if ((offset + sg_len) > 0x10000) 4390d26fc955SAlan Cox len = 0x10000 - offset; 4391d26fc955SAlan Cox 4392d26fc955SAlan Cox blen = len & 0xffff; 4393d26fc955SAlan Cox ap->prd[idx].addr = cpu_to_le32(addr); 4394d26fc955SAlan Cox if (blen == 0) { 4395d26fc955SAlan Cox /* Some PATA chipsets like the CS5530 can't 4396d26fc955SAlan Cox cope with 0x0000 meaning 64K as the spec says */ 4397d26fc955SAlan Cox ap->prd[idx].flags_len = cpu_to_le32(0x8000); 4398d26fc955SAlan Cox blen = 0x8000; 4399d26fc955SAlan Cox ap->prd[++idx].addr = cpu_to_le32(addr + 0x8000); 4400d26fc955SAlan Cox } 4401d26fc955SAlan Cox ap->prd[idx].flags_len = cpu_to_le32(blen); 4402d26fc955SAlan Cox VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", idx, addr, len); 4403d26fc955SAlan Cox 4404d26fc955SAlan Cox idx++; 4405d26fc955SAlan Cox sg_len -= len; 4406d26fc955SAlan Cox addr += len; 4407d26fc955SAlan Cox } 4408d26fc955SAlan Cox } 4409d26fc955SAlan Cox 4410d26fc955SAlan Cox if (idx) 4411d26fc955SAlan Cox ap->prd[idx - 1].flags_len |= cpu_to_le32(ATA_PRD_EOT); 4412d26fc955SAlan Cox } 4413d26fc955SAlan Cox 4414d26fc955SAlan Cox /** 4415c6fd2807SJeff Garzik * ata_check_atapi_dma - Check whether ATAPI DMA can be supported 4416c6fd2807SJeff Garzik * @qc: Metadata associated with taskfile to check 4417c6fd2807SJeff Garzik * 4418c6fd2807SJeff Garzik * Allow low-level driver to filter ATA PACKET commands, returning 4419c6fd2807SJeff Garzik * a status indicating whether or not it is OK to use DMA for the 4420c6fd2807SJeff Garzik * supplied PACKET command. 4421c6fd2807SJeff Garzik * 4422c6fd2807SJeff Garzik * LOCKING: 4423cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 4424c6fd2807SJeff Garzik * 4425c6fd2807SJeff Garzik * RETURNS: 0 when ATAPI DMA can be used 4426c6fd2807SJeff Garzik * nonzero otherwise 4427c6fd2807SJeff Garzik */ 4428c6fd2807SJeff Garzik int ata_check_atapi_dma(struct ata_queued_cmd *qc) 4429c6fd2807SJeff Garzik { 4430c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 4431c6fd2807SJeff Garzik 4432b9a4197eSTejun Heo /* Don't allow DMA if it isn't multiple of 16 bytes. Quite a 4433b9a4197eSTejun Heo * few ATAPI devices choke on such DMA requests. 4434b9a4197eSTejun Heo */ 4435b9a4197eSTejun Heo if (unlikely(qc->nbytes & 15)) 44366f23a31dSAlbert Lee return 1; 44376f23a31dSAlbert Lee 4438c6fd2807SJeff Garzik if (ap->ops->check_atapi_dma) 4439b9a4197eSTejun Heo return ap->ops->check_atapi_dma(qc); 4440c6fd2807SJeff Garzik 4441b9a4197eSTejun Heo return 0; 4442c6fd2807SJeff Garzik } 4443b9a4197eSTejun Heo 4444c6fd2807SJeff Garzik /** 444531cc23b3STejun Heo * ata_std_qc_defer - Check whether a qc needs to be deferred 444631cc23b3STejun Heo * @qc: ATA command in question 444731cc23b3STejun Heo * 444831cc23b3STejun Heo * Non-NCQ commands cannot run with any other command, NCQ or 444931cc23b3STejun Heo * not. As upper layer only knows the queue depth, we are 445031cc23b3STejun Heo * responsible for maintaining exclusion. This function checks 445131cc23b3STejun Heo * whether a new command @qc can be issued. 445231cc23b3STejun Heo * 445331cc23b3STejun Heo * LOCKING: 445431cc23b3STejun Heo * spin_lock_irqsave(host lock) 445531cc23b3STejun Heo * 445631cc23b3STejun Heo * RETURNS: 445731cc23b3STejun Heo * ATA_DEFER_* if deferring is needed, 0 otherwise. 445831cc23b3STejun Heo */ 445931cc23b3STejun Heo int ata_std_qc_defer(struct ata_queued_cmd *qc) 446031cc23b3STejun Heo { 446131cc23b3STejun Heo struct ata_link *link = qc->dev->link; 446231cc23b3STejun Heo 446331cc23b3STejun Heo if (qc->tf.protocol == ATA_PROT_NCQ) { 446431cc23b3STejun Heo if (!ata_tag_valid(link->active_tag)) 446531cc23b3STejun Heo return 0; 446631cc23b3STejun Heo } else { 446731cc23b3STejun Heo if (!ata_tag_valid(link->active_tag) && !link->sactive) 446831cc23b3STejun Heo return 0; 446931cc23b3STejun Heo } 447031cc23b3STejun Heo 447131cc23b3STejun Heo return ATA_DEFER_LINK; 447231cc23b3STejun Heo } 447331cc23b3STejun Heo 447431cc23b3STejun Heo /** 4475c6fd2807SJeff Garzik * ata_qc_prep - Prepare taskfile for submission 4476c6fd2807SJeff Garzik * @qc: Metadata associated with taskfile to be prepared 4477c6fd2807SJeff Garzik * 4478c6fd2807SJeff Garzik * Prepare ATA taskfile for submission. 4479c6fd2807SJeff Garzik * 4480c6fd2807SJeff Garzik * LOCKING: 4481cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 4482c6fd2807SJeff Garzik */ 4483c6fd2807SJeff Garzik void ata_qc_prep(struct ata_queued_cmd *qc) 4484c6fd2807SJeff Garzik { 4485c6fd2807SJeff Garzik if (!(qc->flags & ATA_QCFLAG_DMAMAP)) 4486c6fd2807SJeff Garzik return; 4487c6fd2807SJeff Garzik 4488c6fd2807SJeff Garzik ata_fill_sg(qc); 4489c6fd2807SJeff Garzik } 4490c6fd2807SJeff Garzik 4491d26fc955SAlan Cox /** 4492d26fc955SAlan Cox * ata_dumb_qc_prep - Prepare taskfile for submission 4493d26fc955SAlan Cox * @qc: Metadata associated with taskfile to be prepared 4494d26fc955SAlan Cox * 4495d26fc955SAlan Cox * Prepare ATA taskfile for submission. 4496d26fc955SAlan Cox * 4497d26fc955SAlan Cox * LOCKING: 4498d26fc955SAlan Cox * spin_lock_irqsave(host lock) 4499d26fc955SAlan Cox */ 4500d26fc955SAlan Cox void ata_dumb_qc_prep(struct ata_queued_cmd *qc) 4501d26fc955SAlan Cox { 4502d26fc955SAlan Cox if (!(qc->flags & ATA_QCFLAG_DMAMAP)) 4503d26fc955SAlan Cox return; 4504d26fc955SAlan Cox 4505d26fc955SAlan Cox ata_fill_sg_dumb(qc); 4506d26fc955SAlan Cox } 4507d26fc955SAlan Cox 4508c6fd2807SJeff Garzik void ata_noop_qc_prep(struct ata_queued_cmd *qc) { } 4509c6fd2807SJeff Garzik 4510c6fd2807SJeff Garzik /** 4511c6fd2807SJeff Garzik * ata_sg_init_one - Associate command with memory buffer 4512c6fd2807SJeff Garzik * @qc: Command to be associated 4513c6fd2807SJeff Garzik * @buf: Memory buffer 4514c6fd2807SJeff Garzik * @buflen: Length of memory buffer, in bytes. 4515c6fd2807SJeff Garzik * 4516c6fd2807SJeff Garzik * Initialize the data-related elements of queued_cmd @qc 4517c6fd2807SJeff Garzik * to point to a single memory buffer, @buf of byte length @buflen. 4518c6fd2807SJeff Garzik * 4519c6fd2807SJeff Garzik * LOCKING: 4520cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 4521c6fd2807SJeff Garzik */ 4522c6fd2807SJeff Garzik 4523c6fd2807SJeff Garzik void ata_sg_init_one(struct ata_queued_cmd *qc, void *buf, unsigned int buflen) 4524c6fd2807SJeff Garzik { 4525c6fd2807SJeff Garzik qc->flags |= ATA_QCFLAG_SINGLE; 4526c6fd2807SJeff Garzik 4527c6fd2807SJeff Garzik qc->__sg = &qc->sgent; 4528c6fd2807SJeff Garzik qc->n_elem = 1; 4529c6fd2807SJeff Garzik qc->orig_n_elem = 1; 4530c6fd2807SJeff Garzik qc->buf_virt = buf; 4531c6fd2807SJeff Garzik qc->nbytes = buflen; 4532c6fd2807SJeff Garzik 453361c0596cSTejun Heo sg_init_one(&qc->sgent, buf, buflen); 4534c6fd2807SJeff Garzik } 4535c6fd2807SJeff Garzik 4536c6fd2807SJeff Garzik /** 4537c6fd2807SJeff Garzik * ata_sg_init - Associate command with scatter-gather table. 4538c6fd2807SJeff Garzik * @qc: Command to be associated 4539c6fd2807SJeff Garzik * @sg: Scatter-gather table. 4540c6fd2807SJeff Garzik * @n_elem: Number of elements in s/g table. 4541c6fd2807SJeff Garzik * 4542c6fd2807SJeff Garzik * Initialize the data-related elements of queued_cmd @qc 4543c6fd2807SJeff Garzik * to point to a scatter-gather table @sg, containing @n_elem 4544c6fd2807SJeff Garzik * elements. 4545c6fd2807SJeff Garzik * 4546c6fd2807SJeff Garzik * LOCKING: 4547cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 4548c6fd2807SJeff Garzik */ 4549c6fd2807SJeff Garzik 4550c6fd2807SJeff Garzik void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg, 4551c6fd2807SJeff Garzik unsigned int n_elem) 4552c6fd2807SJeff Garzik { 4553c6fd2807SJeff Garzik qc->flags |= ATA_QCFLAG_SG; 4554c6fd2807SJeff Garzik qc->__sg = sg; 4555c6fd2807SJeff Garzik qc->n_elem = n_elem; 4556c6fd2807SJeff Garzik qc->orig_n_elem = n_elem; 4557c6fd2807SJeff Garzik } 4558c6fd2807SJeff Garzik 4559c6fd2807SJeff Garzik /** 4560c6fd2807SJeff Garzik * ata_sg_setup_one - DMA-map the memory buffer associated with a command. 4561c6fd2807SJeff Garzik * @qc: Command with memory buffer to be mapped. 4562c6fd2807SJeff Garzik * 4563c6fd2807SJeff Garzik * DMA-map the memory buffer associated with queued_cmd @qc. 4564c6fd2807SJeff Garzik * 4565c6fd2807SJeff Garzik * LOCKING: 4566cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 4567c6fd2807SJeff Garzik * 4568c6fd2807SJeff Garzik * RETURNS: 4569c6fd2807SJeff Garzik * Zero on success, negative on error. 4570c6fd2807SJeff Garzik */ 4571c6fd2807SJeff Garzik 4572c6fd2807SJeff Garzik static int ata_sg_setup_one(struct ata_queued_cmd *qc) 4573c6fd2807SJeff Garzik { 4574c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 4575c6fd2807SJeff Garzik int dir = qc->dma_dir; 4576c6fd2807SJeff Garzik struct scatterlist *sg = qc->__sg; 4577c6fd2807SJeff Garzik dma_addr_t dma_address; 4578c6fd2807SJeff Garzik int trim_sg = 0; 4579c6fd2807SJeff Garzik 4580c6fd2807SJeff Garzik /* we must lengthen transfers to end on a 32-bit boundary */ 4581c6fd2807SJeff Garzik qc->pad_len = sg->length & 3; 4582c6fd2807SJeff Garzik if (qc->pad_len) { 4583c6fd2807SJeff Garzik void *pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ); 4584c6fd2807SJeff Garzik struct scatterlist *psg = &qc->pad_sgent; 4585c6fd2807SJeff Garzik 4586c6fd2807SJeff Garzik WARN_ON(qc->dev->class != ATA_DEV_ATAPI); 4587c6fd2807SJeff Garzik 4588c6fd2807SJeff Garzik memset(pad_buf, 0, ATA_DMA_PAD_SZ); 4589c6fd2807SJeff Garzik 4590c6fd2807SJeff Garzik if (qc->tf.flags & ATA_TFLAG_WRITE) 4591c6fd2807SJeff Garzik memcpy(pad_buf, qc->buf_virt + sg->length - qc->pad_len, 4592c6fd2807SJeff Garzik qc->pad_len); 4593c6fd2807SJeff Garzik 4594c6fd2807SJeff Garzik sg_dma_address(psg) = ap->pad_dma + (qc->tag * ATA_DMA_PAD_SZ); 4595c6fd2807SJeff Garzik sg_dma_len(psg) = ATA_DMA_PAD_SZ; 4596c6fd2807SJeff Garzik /* trim sg */ 4597c6fd2807SJeff Garzik sg->length -= qc->pad_len; 4598c6fd2807SJeff Garzik if (sg->length == 0) 4599c6fd2807SJeff Garzik trim_sg = 1; 4600c6fd2807SJeff Garzik 4601c6fd2807SJeff Garzik DPRINTK("padding done, sg->length=%u pad_len=%u\n", 4602c6fd2807SJeff Garzik sg->length, qc->pad_len); 4603c6fd2807SJeff Garzik } 4604c6fd2807SJeff Garzik 4605c6fd2807SJeff Garzik if (trim_sg) { 4606c6fd2807SJeff Garzik qc->n_elem--; 4607c6fd2807SJeff Garzik goto skip_map; 4608c6fd2807SJeff Garzik } 4609c6fd2807SJeff Garzik 4610c6fd2807SJeff Garzik dma_address = dma_map_single(ap->dev, qc->buf_virt, 4611c6fd2807SJeff Garzik sg->length, dir); 4612c6fd2807SJeff Garzik if (dma_mapping_error(dma_address)) { 4613c6fd2807SJeff Garzik /* restore sg */ 4614c6fd2807SJeff Garzik sg->length += qc->pad_len; 4615c6fd2807SJeff Garzik return -1; 4616c6fd2807SJeff Garzik } 4617c6fd2807SJeff Garzik 4618c6fd2807SJeff Garzik sg_dma_address(sg) = dma_address; 4619c6fd2807SJeff Garzik sg_dma_len(sg) = sg->length; 4620c6fd2807SJeff Garzik 4621c6fd2807SJeff Garzik skip_map: 4622c6fd2807SJeff Garzik DPRINTK("mapped buffer of %d bytes for %s\n", sg_dma_len(sg), 4623c6fd2807SJeff Garzik qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read"); 4624c6fd2807SJeff Garzik 4625c6fd2807SJeff Garzik return 0; 4626c6fd2807SJeff Garzik } 4627c6fd2807SJeff Garzik 4628c6fd2807SJeff Garzik /** 4629c6fd2807SJeff Garzik * ata_sg_setup - DMA-map the scatter-gather table associated with a command. 4630c6fd2807SJeff Garzik * @qc: Command with scatter-gather table to be mapped. 4631c6fd2807SJeff Garzik * 4632c6fd2807SJeff Garzik * DMA-map the scatter-gather table associated with queued_cmd @qc. 4633c6fd2807SJeff Garzik * 4634c6fd2807SJeff Garzik * LOCKING: 4635cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 4636c6fd2807SJeff Garzik * 4637c6fd2807SJeff Garzik * RETURNS: 4638c6fd2807SJeff Garzik * Zero on success, negative on error. 4639c6fd2807SJeff Garzik * 4640c6fd2807SJeff Garzik */ 4641c6fd2807SJeff Garzik 4642c6fd2807SJeff Garzik static int ata_sg_setup(struct ata_queued_cmd *qc) 4643c6fd2807SJeff Garzik { 4644c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 4645c6fd2807SJeff Garzik struct scatterlist *sg = qc->__sg; 4646c6fd2807SJeff Garzik struct scatterlist *lsg = &sg[qc->n_elem - 1]; 4647c6fd2807SJeff Garzik int n_elem, pre_n_elem, dir, trim_sg = 0; 4648c6fd2807SJeff Garzik 464944877b4eSTejun Heo VPRINTK("ENTER, ata%u\n", ap->print_id); 4650c6fd2807SJeff Garzik WARN_ON(!(qc->flags & ATA_QCFLAG_SG)); 4651c6fd2807SJeff Garzik 4652c6fd2807SJeff Garzik /* we must lengthen transfers to end on a 32-bit boundary */ 4653c6fd2807SJeff Garzik qc->pad_len = lsg->length & 3; 4654c6fd2807SJeff Garzik if (qc->pad_len) { 4655c6fd2807SJeff Garzik void *pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ); 4656c6fd2807SJeff Garzik struct scatterlist *psg = &qc->pad_sgent; 4657c6fd2807SJeff Garzik unsigned int offset; 4658c6fd2807SJeff Garzik 4659c6fd2807SJeff Garzik WARN_ON(qc->dev->class != ATA_DEV_ATAPI); 4660c6fd2807SJeff Garzik 4661c6fd2807SJeff Garzik memset(pad_buf, 0, ATA_DMA_PAD_SZ); 4662c6fd2807SJeff Garzik 4663c6fd2807SJeff Garzik /* 4664c6fd2807SJeff Garzik * psg->page/offset are used to copy to-be-written 4665c6fd2807SJeff Garzik * data in this function or read data in ata_sg_clean. 4666c6fd2807SJeff Garzik */ 4667c6fd2807SJeff Garzik offset = lsg->offset + lsg->length - qc->pad_len; 4668c6fd2807SJeff Garzik psg->page = nth_page(lsg->page, offset >> PAGE_SHIFT); 4669c6fd2807SJeff Garzik psg->offset = offset_in_page(offset); 4670c6fd2807SJeff Garzik 4671c6fd2807SJeff Garzik if (qc->tf.flags & ATA_TFLAG_WRITE) { 4672c6fd2807SJeff Garzik void *addr = kmap_atomic(psg->page, KM_IRQ0); 4673c6fd2807SJeff Garzik memcpy(pad_buf, addr + psg->offset, qc->pad_len); 4674c6fd2807SJeff Garzik kunmap_atomic(addr, KM_IRQ0); 4675c6fd2807SJeff Garzik } 4676c6fd2807SJeff Garzik 4677c6fd2807SJeff Garzik sg_dma_address(psg) = ap->pad_dma + (qc->tag * ATA_DMA_PAD_SZ); 4678c6fd2807SJeff Garzik sg_dma_len(psg) = ATA_DMA_PAD_SZ; 4679c6fd2807SJeff Garzik /* trim last sg */ 4680c6fd2807SJeff Garzik lsg->length -= qc->pad_len; 4681c6fd2807SJeff Garzik if (lsg->length == 0) 4682c6fd2807SJeff Garzik trim_sg = 1; 4683c6fd2807SJeff Garzik 4684c6fd2807SJeff Garzik DPRINTK("padding done, sg[%d].length=%u pad_len=%u\n", 4685c6fd2807SJeff Garzik qc->n_elem - 1, lsg->length, qc->pad_len); 4686c6fd2807SJeff Garzik } 4687c6fd2807SJeff Garzik 4688c6fd2807SJeff Garzik pre_n_elem = qc->n_elem; 4689c6fd2807SJeff Garzik if (trim_sg && pre_n_elem) 4690c6fd2807SJeff Garzik pre_n_elem--; 4691c6fd2807SJeff Garzik 4692c6fd2807SJeff Garzik if (!pre_n_elem) { 4693c6fd2807SJeff Garzik n_elem = 0; 4694c6fd2807SJeff Garzik goto skip_map; 4695c6fd2807SJeff Garzik } 4696c6fd2807SJeff Garzik 4697c6fd2807SJeff Garzik dir = qc->dma_dir; 4698c6fd2807SJeff Garzik n_elem = dma_map_sg(ap->dev, sg, pre_n_elem, dir); 4699c6fd2807SJeff Garzik if (n_elem < 1) { 4700c6fd2807SJeff Garzik /* restore last sg */ 4701c6fd2807SJeff Garzik lsg->length += qc->pad_len; 4702c6fd2807SJeff Garzik return -1; 4703c6fd2807SJeff Garzik } 4704c6fd2807SJeff Garzik 4705c6fd2807SJeff Garzik DPRINTK("%d sg elements mapped\n", n_elem); 4706c6fd2807SJeff Garzik 4707c6fd2807SJeff Garzik skip_map: 4708c6fd2807SJeff Garzik qc->n_elem = n_elem; 4709c6fd2807SJeff Garzik 4710c6fd2807SJeff Garzik return 0; 4711c6fd2807SJeff Garzik } 4712c6fd2807SJeff Garzik 4713c6fd2807SJeff Garzik /** 4714c6fd2807SJeff Garzik * swap_buf_le16 - swap halves of 16-bit words in place 4715c6fd2807SJeff Garzik * @buf: Buffer to swap 4716c6fd2807SJeff Garzik * @buf_words: Number of 16-bit words in buffer. 4717c6fd2807SJeff Garzik * 4718c6fd2807SJeff Garzik * Swap halves of 16-bit words if needed to convert from 4719c6fd2807SJeff Garzik * little-endian byte order to native cpu byte order, or 4720c6fd2807SJeff Garzik * vice-versa. 4721c6fd2807SJeff Garzik * 4722c6fd2807SJeff Garzik * LOCKING: 4723c6fd2807SJeff Garzik * Inherited from caller. 4724c6fd2807SJeff Garzik */ 4725c6fd2807SJeff Garzik void swap_buf_le16(u16 *buf, unsigned int buf_words) 4726c6fd2807SJeff Garzik { 4727c6fd2807SJeff Garzik #ifdef __BIG_ENDIAN 4728c6fd2807SJeff Garzik unsigned int i; 4729c6fd2807SJeff Garzik 4730c6fd2807SJeff Garzik for (i = 0; i < buf_words; i++) 4731c6fd2807SJeff Garzik buf[i] = le16_to_cpu(buf[i]); 4732c6fd2807SJeff Garzik #endif /* __BIG_ENDIAN */ 4733c6fd2807SJeff Garzik } 4734c6fd2807SJeff Garzik 4735c6fd2807SJeff Garzik /** 47360d5ff566STejun Heo * ata_data_xfer - Transfer data by PIO 4737c6fd2807SJeff Garzik * @adev: device to target 4738c6fd2807SJeff Garzik * @buf: data buffer 4739c6fd2807SJeff Garzik * @buflen: buffer length 4740c6fd2807SJeff Garzik * @write_data: read/write 4741c6fd2807SJeff Garzik * 4742c6fd2807SJeff Garzik * Transfer data from/to the device data register by PIO. 4743c6fd2807SJeff Garzik * 4744c6fd2807SJeff Garzik * LOCKING: 4745c6fd2807SJeff Garzik * Inherited from caller. 4746c6fd2807SJeff Garzik */ 47470d5ff566STejun Heo void ata_data_xfer(struct ata_device *adev, unsigned char *buf, 4748c6fd2807SJeff Garzik unsigned int buflen, int write_data) 4749c6fd2807SJeff Garzik { 47509af5c9c9STejun Heo struct ata_port *ap = adev->link->ap; 4751c6fd2807SJeff Garzik unsigned int words = buflen >> 1; 4752c6fd2807SJeff Garzik 4753c6fd2807SJeff Garzik /* Transfer multiple of 2 bytes */ 4754c6fd2807SJeff Garzik if (write_data) 47550d5ff566STejun Heo iowrite16_rep(ap->ioaddr.data_addr, buf, words); 4756c6fd2807SJeff Garzik else 47570d5ff566STejun Heo ioread16_rep(ap->ioaddr.data_addr, buf, words); 4758c6fd2807SJeff Garzik 4759c6fd2807SJeff Garzik /* Transfer trailing 1 byte, if any. */ 4760c6fd2807SJeff Garzik if (unlikely(buflen & 0x01)) { 4761c6fd2807SJeff Garzik u16 align_buf[1] = { 0 }; 4762c6fd2807SJeff Garzik unsigned char *trailing_buf = buf + buflen - 1; 4763c6fd2807SJeff Garzik 4764c6fd2807SJeff Garzik if (write_data) { 4765c6fd2807SJeff Garzik memcpy(align_buf, trailing_buf, 1); 47660d5ff566STejun Heo iowrite16(le16_to_cpu(align_buf[0]), ap->ioaddr.data_addr); 4767c6fd2807SJeff Garzik } else { 47680d5ff566STejun Heo align_buf[0] = cpu_to_le16(ioread16(ap->ioaddr.data_addr)); 4769c6fd2807SJeff Garzik memcpy(trailing_buf, align_buf, 1); 4770c6fd2807SJeff Garzik } 4771c6fd2807SJeff Garzik } 4772c6fd2807SJeff Garzik } 4773c6fd2807SJeff Garzik 4774c6fd2807SJeff Garzik /** 47750d5ff566STejun Heo * ata_data_xfer_noirq - Transfer data by PIO 4776c6fd2807SJeff Garzik * @adev: device to target 4777c6fd2807SJeff Garzik * @buf: data buffer 4778c6fd2807SJeff Garzik * @buflen: buffer length 4779c6fd2807SJeff Garzik * @write_data: read/write 4780c6fd2807SJeff Garzik * 4781c6fd2807SJeff Garzik * Transfer data from/to the device data register by PIO. Do the 4782c6fd2807SJeff Garzik * transfer with interrupts disabled. 4783c6fd2807SJeff Garzik * 4784c6fd2807SJeff Garzik * LOCKING: 4785c6fd2807SJeff Garzik * Inherited from caller. 4786c6fd2807SJeff Garzik */ 47870d5ff566STejun Heo void ata_data_xfer_noirq(struct ata_device *adev, unsigned char *buf, 4788c6fd2807SJeff Garzik unsigned int buflen, int write_data) 4789c6fd2807SJeff Garzik { 4790c6fd2807SJeff Garzik unsigned long flags; 4791c6fd2807SJeff Garzik local_irq_save(flags); 47920d5ff566STejun Heo ata_data_xfer(adev, buf, buflen, write_data); 4793c6fd2807SJeff Garzik local_irq_restore(flags); 4794c6fd2807SJeff Garzik } 4795c6fd2807SJeff Garzik 4796c6fd2807SJeff Garzik 4797c6fd2807SJeff Garzik /** 47985a5dbd18SMark Lord * ata_pio_sector - Transfer a sector of data. 4799c6fd2807SJeff Garzik * @qc: Command on going 4800c6fd2807SJeff Garzik * 48015a5dbd18SMark Lord * Transfer qc->sect_size bytes of data from/to the ATA device. 4802c6fd2807SJeff Garzik * 4803c6fd2807SJeff Garzik * LOCKING: 4804c6fd2807SJeff Garzik * Inherited from caller. 4805c6fd2807SJeff Garzik */ 4806c6fd2807SJeff Garzik 4807c6fd2807SJeff Garzik static void ata_pio_sector(struct ata_queued_cmd *qc) 4808c6fd2807SJeff Garzik { 4809c6fd2807SJeff Garzik int do_write = (qc->tf.flags & ATA_TFLAG_WRITE); 4810c6fd2807SJeff Garzik struct scatterlist *sg = qc->__sg; 4811c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 4812c6fd2807SJeff Garzik struct page *page; 4813c6fd2807SJeff Garzik unsigned int offset; 4814c6fd2807SJeff Garzik unsigned char *buf; 4815c6fd2807SJeff Garzik 48165a5dbd18SMark Lord if (qc->curbytes == qc->nbytes - qc->sect_size) 4817c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_LAST; 4818c6fd2807SJeff Garzik 4819c6fd2807SJeff Garzik page = sg[qc->cursg].page; 4820726f0785STejun Heo offset = sg[qc->cursg].offset + qc->cursg_ofs; 4821c6fd2807SJeff Garzik 4822c6fd2807SJeff Garzik /* get the current page and offset */ 4823c6fd2807SJeff Garzik page = nth_page(page, (offset >> PAGE_SHIFT)); 4824c6fd2807SJeff Garzik offset %= PAGE_SIZE; 4825c6fd2807SJeff Garzik 4826c6fd2807SJeff Garzik DPRINTK("data %s\n", qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read"); 4827c6fd2807SJeff Garzik 4828c6fd2807SJeff Garzik if (PageHighMem(page)) { 4829c6fd2807SJeff Garzik unsigned long flags; 4830c6fd2807SJeff Garzik 4831c6fd2807SJeff Garzik /* FIXME: use a bounce buffer */ 4832c6fd2807SJeff Garzik local_irq_save(flags); 4833c6fd2807SJeff Garzik buf = kmap_atomic(page, KM_IRQ0); 4834c6fd2807SJeff Garzik 4835c6fd2807SJeff Garzik /* do the actual data transfer */ 48365a5dbd18SMark Lord ap->ops->data_xfer(qc->dev, buf + offset, qc->sect_size, do_write); 4837c6fd2807SJeff Garzik 4838c6fd2807SJeff Garzik kunmap_atomic(buf, KM_IRQ0); 4839c6fd2807SJeff Garzik local_irq_restore(flags); 4840c6fd2807SJeff Garzik } else { 4841c6fd2807SJeff Garzik buf = page_address(page); 48425a5dbd18SMark Lord ap->ops->data_xfer(qc->dev, buf + offset, qc->sect_size, do_write); 4843c6fd2807SJeff Garzik } 4844c6fd2807SJeff Garzik 48455a5dbd18SMark Lord qc->curbytes += qc->sect_size; 48465a5dbd18SMark Lord qc->cursg_ofs += qc->sect_size; 4847c6fd2807SJeff Garzik 4848726f0785STejun Heo if (qc->cursg_ofs == (&sg[qc->cursg])->length) { 4849c6fd2807SJeff Garzik qc->cursg++; 4850c6fd2807SJeff Garzik qc->cursg_ofs = 0; 4851c6fd2807SJeff Garzik } 4852c6fd2807SJeff Garzik } 4853c6fd2807SJeff Garzik 4854c6fd2807SJeff Garzik /** 48555a5dbd18SMark Lord * ata_pio_sectors - Transfer one or many sectors. 4856c6fd2807SJeff Garzik * @qc: Command on going 4857c6fd2807SJeff Garzik * 48585a5dbd18SMark Lord * Transfer one or many sectors of data from/to the 4859c6fd2807SJeff Garzik * ATA device for the DRQ request. 4860c6fd2807SJeff Garzik * 4861c6fd2807SJeff Garzik * LOCKING: 4862c6fd2807SJeff Garzik * Inherited from caller. 4863c6fd2807SJeff Garzik */ 4864c6fd2807SJeff Garzik 4865c6fd2807SJeff Garzik static void ata_pio_sectors(struct ata_queued_cmd *qc) 4866c6fd2807SJeff Garzik { 4867c6fd2807SJeff Garzik if (is_multi_taskfile(&qc->tf)) { 4868c6fd2807SJeff Garzik /* READ/WRITE MULTIPLE */ 4869c6fd2807SJeff Garzik unsigned int nsect; 4870c6fd2807SJeff Garzik 4871c6fd2807SJeff Garzik WARN_ON(qc->dev->multi_count == 0); 4872c6fd2807SJeff Garzik 48735a5dbd18SMark Lord nsect = min((qc->nbytes - qc->curbytes) / qc->sect_size, 4874726f0785STejun Heo qc->dev->multi_count); 4875c6fd2807SJeff Garzik while (nsect--) 4876c6fd2807SJeff Garzik ata_pio_sector(qc); 4877c6fd2807SJeff Garzik } else 4878c6fd2807SJeff Garzik ata_pio_sector(qc); 48794cc980b3SAlbert Lee 48804cc980b3SAlbert Lee ata_altstatus(qc->ap); /* flush */ 4881c6fd2807SJeff Garzik } 4882c6fd2807SJeff Garzik 4883c6fd2807SJeff Garzik /** 4884c6fd2807SJeff Garzik * atapi_send_cdb - Write CDB bytes to hardware 4885c6fd2807SJeff Garzik * @ap: Port to which ATAPI device is attached. 4886c6fd2807SJeff Garzik * @qc: Taskfile currently active 4887c6fd2807SJeff Garzik * 4888c6fd2807SJeff Garzik * When device has indicated its readiness to accept 4889c6fd2807SJeff Garzik * a CDB, this function is called. Send the CDB. 4890c6fd2807SJeff Garzik * 4891c6fd2807SJeff Garzik * LOCKING: 4892c6fd2807SJeff Garzik * caller. 4893c6fd2807SJeff Garzik */ 4894c6fd2807SJeff Garzik 4895c6fd2807SJeff Garzik static void atapi_send_cdb(struct ata_port *ap, struct ata_queued_cmd *qc) 4896c6fd2807SJeff Garzik { 4897c6fd2807SJeff Garzik /* send SCSI cdb */ 4898c6fd2807SJeff Garzik DPRINTK("send cdb\n"); 4899c6fd2807SJeff Garzik WARN_ON(qc->dev->cdb_len < 12); 4900c6fd2807SJeff Garzik 4901c6fd2807SJeff Garzik ap->ops->data_xfer(qc->dev, qc->cdb, qc->dev->cdb_len, 1); 4902c6fd2807SJeff Garzik ata_altstatus(ap); /* flush */ 4903c6fd2807SJeff Garzik 4904c6fd2807SJeff Garzik switch (qc->tf.protocol) { 4905c6fd2807SJeff Garzik case ATA_PROT_ATAPI: 4906c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST; 4907c6fd2807SJeff Garzik break; 4908c6fd2807SJeff Garzik case ATA_PROT_ATAPI_NODATA: 4909c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_LAST; 4910c6fd2807SJeff Garzik break; 4911c6fd2807SJeff Garzik case ATA_PROT_ATAPI_DMA: 4912c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_LAST; 4913c6fd2807SJeff Garzik /* initiate bmdma */ 4914c6fd2807SJeff Garzik ap->ops->bmdma_start(qc); 4915c6fd2807SJeff Garzik break; 4916c6fd2807SJeff Garzik } 4917c6fd2807SJeff Garzik } 4918c6fd2807SJeff Garzik 4919c6fd2807SJeff Garzik /** 4920c6fd2807SJeff Garzik * __atapi_pio_bytes - Transfer data from/to the ATAPI device. 4921c6fd2807SJeff Garzik * @qc: Command on going 4922c6fd2807SJeff Garzik * @bytes: number of bytes 4923c6fd2807SJeff Garzik * 4924c6fd2807SJeff Garzik * Transfer Transfer data from/to the ATAPI device. 4925c6fd2807SJeff Garzik * 4926c6fd2807SJeff Garzik * LOCKING: 4927c6fd2807SJeff Garzik * Inherited from caller. 4928c6fd2807SJeff Garzik * 4929c6fd2807SJeff Garzik */ 4930c6fd2807SJeff Garzik 4931c6fd2807SJeff Garzik static void __atapi_pio_bytes(struct ata_queued_cmd *qc, unsigned int bytes) 4932c6fd2807SJeff Garzik { 4933c6fd2807SJeff Garzik int do_write = (qc->tf.flags & ATA_TFLAG_WRITE); 4934c6fd2807SJeff Garzik struct scatterlist *sg = qc->__sg; 4935c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 4936c6fd2807SJeff Garzik struct page *page; 4937c6fd2807SJeff Garzik unsigned char *buf; 4938c6fd2807SJeff Garzik unsigned int offset, count; 4939c6fd2807SJeff Garzik 4940c6fd2807SJeff Garzik if (qc->curbytes + bytes >= qc->nbytes) 4941c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_LAST; 4942c6fd2807SJeff Garzik 4943c6fd2807SJeff Garzik next_sg: 4944c6fd2807SJeff Garzik if (unlikely(qc->cursg >= qc->n_elem)) { 4945c6fd2807SJeff Garzik /* 4946c6fd2807SJeff Garzik * The end of qc->sg is reached and the device expects 4947c6fd2807SJeff Garzik * more data to transfer. In order not to overrun qc->sg 4948c6fd2807SJeff Garzik * and fulfill length specified in the byte count register, 4949c6fd2807SJeff Garzik * - for read case, discard trailing data from the device 4950c6fd2807SJeff Garzik * - for write case, padding zero data to the device 4951c6fd2807SJeff Garzik */ 4952c6fd2807SJeff Garzik u16 pad_buf[1] = { 0 }; 4953c6fd2807SJeff Garzik unsigned int words = bytes >> 1; 4954c6fd2807SJeff Garzik unsigned int i; 4955c6fd2807SJeff Garzik 4956c6fd2807SJeff Garzik if (words) /* warning if bytes > 1 */ 4957c6fd2807SJeff Garzik ata_dev_printk(qc->dev, KERN_WARNING, 4958c6fd2807SJeff Garzik "%u bytes trailing data\n", bytes); 4959c6fd2807SJeff Garzik 4960c6fd2807SJeff Garzik for (i = 0; i < words; i++) 4961c6fd2807SJeff Garzik ap->ops->data_xfer(qc->dev, (unsigned char*)pad_buf, 2, do_write); 4962c6fd2807SJeff Garzik 4963c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_LAST; 4964c6fd2807SJeff Garzik return; 4965c6fd2807SJeff Garzik } 4966c6fd2807SJeff Garzik 4967c6fd2807SJeff Garzik sg = &qc->__sg[qc->cursg]; 4968c6fd2807SJeff Garzik 4969c6fd2807SJeff Garzik page = sg->page; 4970c6fd2807SJeff Garzik offset = sg->offset + qc->cursg_ofs; 4971c6fd2807SJeff Garzik 4972c6fd2807SJeff Garzik /* get the current page and offset */ 4973c6fd2807SJeff Garzik page = nth_page(page, (offset >> PAGE_SHIFT)); 4974c6fd2807SJeff Garzik offset %= PAGE_SIZE; 4975c6fd2807SJeff Garzik 4976c6fd2807SJeff Garzik /* don't overrun current sg */ 4977c6fd2807SJeff Garzik count = min(sg->length - qc->cursg_ofs, bytes); 4978c6fd2807SJeff Garzik 4979c6fd2807SJeff Garzik /* don't cross page boundaries */ 4980c6fd2807SJeff Garzik count = min(count, (unsigned int)PAGE_SIZE - offset); 4981c6fd2807SJeff Garzik 4982c6fd2807SJeff Garzik DPRINTK("data %s\n", qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read"); 4983c6fd2807SJeff Garzik 4984c6fd2807SJeff Garzik if (PageHighMem(page)) { 4985c6fd2807SJeff Garzik unsigned long flags; 4986c6fd2807SJeff Garzik 4987c6fd2807SJeff Garzik /* FIXME: use bounce buffer */ 4988c6fd2807SJeff Garzik local_irq_save(flags); 4989c6fd2807SJeff Garzik buf = kmap_atomic(page, KM_IRQ0); 4990c6fd2807SJeff Garzik 4991c6fd2807SJeff Garzik /* do the actual data transfer */ 4992c6fd2807SJeff Garzik ap->ops->data_xfer(qc->dev, buf + offset, count, do_write); 4993c6fd2807SJeff Garzik 4994c6fd2807SJeff Garzik kunmap_atomic(buf, KM_IRQ0); 4995c6fd2807SJeff Garzik local_irq_restore(flags); 4996c6fd2807SJeff Garzik } else { 4997c6fd2807SJeff Garzik buf = page_address(page); 4998c6fd2807SJeff Garzik ap->ops->data_xfer(qc->dev, buf + offset, count, do_write); 4999c6fd2807SJeff Garzik } 5000c6fd2807SJeff Garzik 5001c6fd2807SJeff Garzik bytes -= count; 5002c6fd2807SJeff Garzik qc->curbytes += count; 5003c6fd2807SJeff Garzik qc->cursg_ofs += count; 5004c6fd2807SJeff Garzik 5005c6fd2807SJeff Garzik if (qc->cursg_ofs == sg->length) { 5006c6fd2807SJeff Garzik qc->cursg++; 5007c6fd2807SJeff Garzik qc->cursg_ofs = 0; 5008c6fd2807SJeff Garzik } 5009c6fd2807SJeff Garzik 5010c6fd2807SJeff Garzik if (bytes) 5011c6fd2807SJeff Garzik goto next_sg; 5012c6fd2807SJeff Garzik } 5013c6fd2807SJeff Garzik 5014c6fd2807SJeff Garzik /** 5015c6fd2807SJeff Garzik * atapi_pio_bytes - Transfer data from/to the ATAPI device. 5016c6fd2807SJeff Garzik * @qc: Command on going 5017c6fd2807SJeff Garzik * 5018c6fd2807SJeff Garzik * Transfer Transfer data from/to the ATAPI device. 5019c6fd2807SJeff Garzik * 5020c6fd2807SJeff Garzik * LOCKING: 5021c6fd2807SJeff Garzik * Inherited from caller. 5022c6fd2807SJeff Garzik */ 5023c6fd2807SJeff Garzik 5024c6fd2807SJeff Garzik static void atapi_pio_bytes(struct ata_queued_cmd *qc) 5025c6fd2807SJeff Garzik { 5026c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 5027c6fd2807SJeff Garzik struct ata_device *dev = qc->dev; 5028c6fd2807SJeff Garzik unsigned int ireason, bc_lo, bc_hi, bytes; 5029c6fd2807SJeff Garzik int i_write, do_write = (qc->tf.flags & ATA_TFLAG_WRITE) ? 1 : 0; 5030c6fd2807SJeff Garzik 5031c6fd2807SJeff Garzik /* Abuse qc->result_tf for temp storage of intermediate TF 5032c6fd2807SJeff Garzik * here to save some kernel stack usage. 5033c6fd2807SJeff Garzik * For normal completion, qc->result_tf is not relevant. For 5034c6fd2807SJeff Garzik * error, qc->result_tf is later overwritten by ata_qc_complete(). 5035c6fd2807SJeff Garzik * So, the correctness of qc->result_tf is not affected. 5036c6fd2807SJeff Garzik */ 5037c6fd2807SJeff Garzik ap->ops->tf_read(ap, &qc->result_tf); 5038c6fd2807SJeff Garzik ireason = qc->result_tf.nsect; 5039c6fd2807SJeff Garzik bc_lo = qc->result_tf.lbam; 5040c6fd2807SJeff Garzik bc_hi = qc->result_tf.lbah; 5041c6fd2807SJeff Garzik bytes = (bc_hi << 8) | bc_lo; 5042c6fd2807SJeff Garzik 5043c6fd2807SJeff Garzik /* shall be cleared to zero, indicating xfer of data */ 5044c6fd2807SJeff Garzik if (ireason & (1 << 0)) 5045c6fd2807SJeff Garzik goto err_out; 5046c6fd2807SJeff Garzik 5047c6fd2807SJeff Garzik /* make sure transfer direction matches expected */ 5048c6fd2807SJeff Garzik i_write = ((ireason & (1 << 1)) == 0) ? 1 : 0; 5049c6fd2807SJeff Garzik if (do_write != i_write) 5050c6fd2807SJeff Garzik goto err_out; 5051c6fd2807SJeff Garzik 505244877b4eSTejun Heo VPRINTK("ata%u: xfering %d bytes\n", ap->print_id, bytes); 5053c6fd2807SJeff Garzik 5054c6fd2807SJeff Garzik __atapi_pio_bytes(qc, bytes); 50554cc980b3SAlbert Lee ata_altstatus(ap); /* flush */ 5056c6fd2807SJeff Garzik 5057c6fd2807SJeff Garzik return; 5058c6fd2807SJeff Garzik 5059c6fd2807SJeff Garzik err_out: 5060c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_INFO, "ATAPI check failed\n"); 5061c6fd2807SJeff Garzik qc->err_mask |= AC_ERR_HSM; 5062c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_ERR; 5063c6fd2807SJeff Garzik } 5064c6fd2807SJeff Garzik 5065c6fd2807SJeff Garzik /** 5066c6fd2807SJeff Garzik * ata_hsm_ok_in_wq - Check if the qc can be handled in the workqueue. 5067c6fd2807SJeff Garzik * @ap: the target ata_port 5068c6fd2807SJeff Garzik * @qc: qc on going 5069c6fd2807SJeff Garzik * 5070c6fd2807SJeff Garzik * RETURNS: 5071c6fd2807SJeff Garzik * 1 if ok in workqueue, 0 otherwise. 5072c6fd2807SJeff Garzik */ 5073c6fd2807SJeff Garzik 5074c6fd2807SJeff Garzik static inline int ata_hsm_ok_in_wq(struct ata_port *ap, struct ata_queued_cmd *qc) 5075c6fd2807SJeff Garzik { 5076c6fd2807SJeff Garzik if (qc->tf.flags & ATA_TFLAG_POLLING) 5077c6fd2807SJeff Garzik return 1; 5078c6fd2807SJeff Garzik 5079c6fd2807SJeff Garzik if (ap->hsm_task_state == HSM_ST_FIRST) { 5080c6fd2807SJeff Garzik if (qc->tf.protocol == ATA_PROT_PIO && 5081c6fd2807SJeff Garzik (qc->tf.flags & ATA_TFLAG_WRITE)) 5082c6fd2807SJeff Garzik return 1; 5083c6fd2807SJeff Garzik 5084c6fd2807SJeff Garzik if (is_atapi_taskfile(&qc->tf) && 5085c6fd2807SJeff Garzik !(qc->dev->flags & ATA_DFLAG_CDB_INTR)) 5086c6fd2807SJeff Garzik return 1; 5087c6fd2807SJeff Garzik } 5088c6fd2807SJeff Garzik 5089c6fd2807SJeff Garzik return 0; 5090c6fd2807SJeff Garzik } 5091c6fd2807SJeff Garzik 5092c6fd2807SJeff Garzik /** 5093c6fd2807SJeff Garzik * ata_hsm_qc_complete - finish a qc running on standard HSM 5094c6fd2807SJeff Garzik * @qc: Command to complete 5095c6fd2807SJeff Garzik * @in_wq: 1 if called from workqueue, 0 otherwise 5096c6fd2807SJeff Garzik * 5097c6fd2807SJeff Garzik * Finish @qc which is running on standard HSM. 5098c6fd2807SJeff Garzik * 5099c6fd2807SJeff Garzik * LOCKING: 5100cca3974eSJeff Garzik * If @in_wq is zero, spin_lock_irqsave(host lock). 5101c6fd2807SJeff Garzik * Otherwise, none on entry and grabs host lock. 5102c6fd2807SJeff Garzik */ 5103c6fd2807SJeff Garzik static void ata_hsm_qc_complete(struct ata_queued_cmd *qc, int in_wq) 5104c6fd2807SJeff Garzik { 5105c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 5106c6fd2807SJeff Garzik unsigned long flags; 5107c6fd2807SJeff Garzik 5108c6fd2807SJeff Garzik if (ap->ops->error_handler) { 5109c6fd2807SJeff Garzik if (in_wq) { 5110c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 5111c6fd2807SJeff Garzik 5112cca3974eSJeff Garzik /* EH might have kicked in while host lock is 5113cca3974eSJeff Garzik * released. 5114c6fd2807SJeff Garzik */ 5115c6fd2807SJeff Garzik qc = ata_qc_from_tag(ap, qc->tag); 5116c6fd2807SJeff Garzik if (qc) { 5117c6fd2807SJeff Garzik if (likely(!(qc->err_mask & AC_ERR_HSM))) { 511883625006SAkira Iguchi ap->ops->irq_on(ap); 5119c6fd2807SJeff Garzik ata_qc_complete(qc); 5120c6fd2807SJeff Garzik } else 5121c6fd2807SJeff Garzik ata_port_freeze(ap); 5122c6fd2807SJeff Garzik } 5123c6fd2807SJeff Garzik 5124c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 5125c6fd2807SJeff Garzik } else { 5126c6fd2807SJeff Garzik if (likely(!(qc->err_mask & AC_ERR_HSM))) 5127c6fd2807SJeff Garzik ata_qc_complete(qc); 5128c6fd2807SJeff Garzik else 5129c6fd2807SJeff Garzik ata_port_freeze(ap); 5130c6fd2807SJeff Garzik } 5131c6fd2807SJeff Garzik } else { 5132c6fd2807SJeff Garzik if (in_wq) { 5133c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 513483625006SAkira Iguchi ap->ops->irq_on(ap); 5135c6fd2807SJeff Garzik ata_qc_complete(qc); 5136c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 5137c6fd2807SJeff Garzik } else 5138c6fd2807SJeff Garzik ata_qc_complete(qc); 5139c6fd2807SJeff Garzik } 5140c6fd2807SJeff Garzik } 5141c6fd2807SJeff Garzik 5142c6fd2807SJeff Garzik /** 5143c6fd2807SJeff Garzik * ata_hsm_move - move the HSM to the next state. 5144c6fd2807SJeff Garzik * @ap: the target ata_port 5145c6fd2807SJeff Garzik * @qc: qc on going 5146c6fd2807SJeff Garzik * @status: current device status 5147c6fd2807SJeff Garzik * @in_wq: 1 if called from workqueue, 0 otherwise 5148c6fd2807SJeff Garzik * 5149c6fd2807SJeff Garzik * RETURNS: 5150c6fd2807SJeff Garzik * 1 when poll next status needed, 0 otherwise. 5151c6fd2807SJeff Garzik */ 5152c6fd2807SJeff Garzik int ata_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc, 5153c6fd2807SJeff Garzik u8 status, int in_wq) 5154c6fd2807SJeff Garzik { 5155c6fd2807SJeff Garzik unsigned long flags = 0; 5156c6fd2807SJeff Garzik int poll_next; 5157c6fd2807SJeff Garzik 5158c6fd2807SJeff Garzik WARN_ON((qc->flags & ATA_QCFLAG_ACTIVE) == 0); 5159c6fd2807SJeff Garzik 5160c6fd2807SJeff Garzik /* Make sure ata_qc_issue_prot() does not throw things 5161c6fd2807SJeff Garzik * like DMA polling into the workqueue. Notice that 5162c6fd2807SJeff Garzik * in_wq is not equivalent to (qc->tf.flags & ATA_TFLAG_POLLING). 5163c6fd2807SJeff Garzik */ 5164c6fd2807SJeff Garzik WARN_ON(in_wq != ata_hsm_ok_in_wq(ap, qc)); 5165c6fd2807SJeff Garzik 5166c6fd2807SJeff Garzik fsm_start: 5167c6fd2807SJeff Garzik DPRINTK("ata%u: protocol %d task_state %d (dev_stat 0x%X)\n", 516844877b4eSTejun Heo ap->print_id, qc->tf.protocol, ap->hsm_task_state, status); 5169c6fd2807SJeff Garzik 5170c6fd2807SJeff Garzik switch (ap->hsm_task_state) { 5171c6fd2807SJeff Garzik case HSM_ST_FIRST: 5172c6fd2807SJeff Garzik /* Send first data block or PACKET CDB */ 5173c6fd2807SJeff Garzik 5174c6fd2807SJeff Garzik /* If polling, we will stay in the work queue after 5175c6fd2807SJeff Garzik * sending the data. Otherwise, interrupt handler 5176c6fd2807SJeff Garzik * takes over after sending the data. 5177c6fd2807SJeff Garzik */ 5178c6fd2807SJeff Garzik poll_next = (qc->tf.flags & ATA_TFLAG_POLLING); 5179c6fd2807SJeff Garzik 5180c6fd2807SJeff Garzik /* check device status */ 5181c6fd2807SJeff Garzik if (unlikely((status & ATA_DRQ) == 0)) { 5182c6fd2807SJeff Garzik /* handle BSY=0, DRQ=0 as error */ 5183c6fd2807SJeff Garzik if (likely(status & (ATA_ERR | ATA_DF))) 5184c6fd2807SJeff Garzik /* device stops HSM for abort/error */ 5185c6fd2807SJeff Garzik qc->err_mask |= AC_ERR_DEV; 5186c6fd2807SJeff Garzik else 5187c6fd2807SJeff Garzik /* HSM violation. Let EH handle this */ 5188c6fd2807SJeff Garzik qc->err_mask |= AC_ERR_HSM; 5189c6fd2807SJeff Garzik 5190c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_ERR; 5191c6fd2807SJeff Garzik goto fsm_start; 5192c6fd2807SJeff Garzik } 5193c6fd2807SJeff Garzik 5194c6fd2807SJeff Garzik /* Device should not ask for data transfer (DRQ=1) 5195c6fd2807SJeff Garzik * when it finds something wrong. 5196c6fd2807SJeff Garzik * We ignore DRQ here and stop the HSM by 5197c6fd2807SJeff Garzik * changing hsm_task_state to HSM_ST_ERR and 5198c6fd2807SJeff Garzik * let the EH abort the command or reset the device. 5199c6fd2807SJeff Garzik */ 5200c6fd2807SJeff Garzik if (unlikely(status & (ATA_ERR | ATA_DF))) { 520144877b4eSTejun Heo ata_port_printk(ap, KERN_WARNING, "DRQ=1 with device " 520244877b4eSTejun Heo "error, dev_stat 0x%X\n", status); 5203c6fd2807SJeff Garzik qc->err_mask |= AC_ERR_HSM; 5204c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_ERR; 5205c6fd2807SJeff Garzik goto fsm_start; 5206c6fd2807SJeff Garzik } 5207c6fd2807SJeff Garzik 5208c6fd2807SJeff Garzik /* Send the CDB (atapi) or the first data block (ata pio out). 5209c6fd2807SJeff Garzik * During the state transition, interrupt handler shouldn't 5210c6fd2807SJeff Garzik * be invoked before the data transfer is complete and 5211c6fd2807SJeff Garzik * hsm_task_state is changed. Hence, the following locking. 5212c6fd2807SJeff Garzik */ 5213c6fd2807SJeff Garzik if (in_wq) 5214c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 5215c6fd2807SJeff Garzik 5216c6fd2807SJeff Garzik if (qc->tf.protocol == ATA_PROT_PIO) { 5217c6fd2807SJeff Garzik /* PIO data out protocol. 5218c6fd2807SJeff Garzik * send first data block. 5219c6fd2807SJeff Garzik */ 5220c6fd2807SJeff Garzik 5221c6fd2807SJeff Garzik /* ata_pio_sectors() might change the state 5222c6fd2807SJeff Garzik * to HSM_ST_LAST. so, the state is changed here 5223c6fd2807SJeff Garzik * before ata_pio_sectors(). 5224c6fd2807SJeff Garzik */ 5225c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST; 5226c6fd2807SJeff Garzik ata_pio_sectors(qc); 5227c6fd2807SJeff Garzik } else 5228c6fd2807SJeff Garzik /* send CDB */ 5229c6fd2807SJeff Garzik atapi_send_cdb(ap, qc); 5230c6fd2807SJeff Garzik 5231c6fd2807SJeff Garzik if (in_wq) 5232c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 5233c6fd2807SJeff Garzik 5234c6fd2807SJeff Garzik /* if polling, ata_pio_task() handles the rest. 5235c6fd2807SJeff Garzik * otherwise, interrupt handler takes over from here. 5236c6fd2807SJeff Garzik */ 5237c6fd2807SJeff Garzik break; 5238c6fd2807SJeff Garzik 5239c6fd2807SJeff Garzik case HSM_ST: 5240c6fd2807SJeff Garzik /* complete command or read/write the data register */ 5241c6fd2807SJeff Garzik if (qc->tf.protocol == ATA_PROT_ATAPI) { 5242c6fd2807SJeff Garzik /* ATAPI PIO protocol */ 5243c6fd2807SJeff Garzik if ((status & ATA_DRQ) == 0) { 5244c6fd2807SJeff Garzik /* No more data to transfer or device error. 5245c6fd2807SJeff Garzik * Device error will be tagged in HSM_ST_LAST. 5246c6fd2807SJeff Garzik */ 5247c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_LAST; 5248c6fd2807SJeff Garzik goto fsm_start; 5249c6fd2807SJeff Garzik } 5250c6fd2807SJeff Garzik 5251c6fd2807SJeff Garzik /* Device should not ask for data transfer (DRQ=1) 5252c6fd2807SJeff Garzik * when it finds something wrong. 5253c6fd2807SJeff Garzik * We ignore DRQ here and stop the HSM by 5254c6fd2807SJeff Garzik * changing hsm_task_state to HSM_ST_ERR and 5255c6fd2807SJeff Garzik * let the EH abort the command or reset the device. 5256c6fd2807SJeff Garzik */ 5257c6fd2807SJeff Garzik if (unlikely(status & (ATA_ERR | ATA_DF))) { 525844877b4eSTejun Heo ata_port_printk(ap, KERN_WARNING, "DRQ=1 with " 525944877b4eSTejun Heo "device error, dev_stat 0x%X\n", 526044877b4eSTejun Heo status); 5261c6fd2807SJeff Garzik qc->err_mask |= AC_ERR_HSM; 5262c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_ERR; 5263c6fd2807SJeff Garzik goto fsm_start; 5264c6fd2807SJeff Garzik } 5265c6fd2807SJeff Garzik 5266c6fd2807SJeff Garzik atapi_pio_bytes(qc); 5267c6fd2807SJeff Garzik 5268c6fd2807SJeff Garzik if (unlikely(ap->hsm_task_state == HSM_ST_ERR)) 5269c6fd2807SJeff Garzik /* bad ireason reported by device */ 5270c6fd2807SJeff Garzik goto fsm_start; 5271c6fd2807SJeff Garzik 5272c6fd2807SJeff Garzik } else { 5273c6fd2807SJeff Garzik /* ATA PIO protocol */ 5274c6fd2807SJeff Garzik if (unlikely((status & ATA_DRQ) == 0)) { 5275c6fd2807SJeff Garzik /* handle BSY=0, DRQ=0 as error */ 5276c6fd2807SJeff Garzik if (likely(status & (ATA_ERR | ATA_DF))) 5277c6fd2807SJeff Garzik /* device stops HSM for abort/error */ 5278c6fd2807SJeff Garzik qc->err_mask |= AC_ERR_DEV; 5279c6fd2807SJeff Garzik else 528055a8e2c8STejun Heo /* HSM violation. Let EH handle this. 528155a8e2c8STejun Heo * Phantom devices also trigger this 528255a8e2c8STejun Heo * condition. Mark hint. 528355a8e2c8STejun Heo */ 528455a8e2c8STejun Heo qc->err_mask |= AC_ERR_HSM | 528555a8e2c8STejun Heo AC_ERR_NODEV_HINT; 5286c6fd2807SJeff Garzik 5287c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_ERR; 5288c6fd2807SJeff Garzik goto fsm_start; 5289c6fd2807SJeff Garzik } 5290c6fd2807SJeff Garzik 5291c6fd2807SJeff Garzik /* For PIO reads, some devices may ask for 5292c6fd2807SJeff Garzik * data transfer (DRQ=1) alone with ERR=1. 5293c6fd2807SJeff Garzik * We respect DRQ here and transfer one 5294c6fd2807SJeff Garzik * block of junk data before changing the 5295c6fd2807SJeff Garzik * hsm_task_state to HSM_ST_ERR. 5296c6fd2807SJeff Garzik * 5297c6fd2807SJeff Garzik * For PIO writes, ERR=1 DRQ=1 doesn't make 5298c6fd2807SJeff Garzik * sense since the data block has been 5299c6fd2807SJeff Garzik * transferred to the device. 5300c6fd2807SJeff Garzik */ 5301c6fd2807SJeff Garzik if (unlikely(status & (ATA_ERR | ATA_DF))) { 5302c6fd2807SJeff Garzik /* data might be corrputed */ 5303c6fd2807SJeff Garzik qc->err_mask |= AC_ERR_DEV; 5304c6fd2807SJeff Garzik 5305c6fd2807SJeff Garzik if (!(qc->tf.flags & ATA_TFLAG_WRITE)) { 5306c6fd2807SJeff Garzik ata_pio_sectors(qc); 5307c6fd2807SJeff Garzik status = ata_wait_idle(ap); 5308c6fd2807SJeff Garzik } 5309c6fd2807SJeff Garzik 5310c6fd2807SJeff Garzik if (status & (ATA_BUSY | ATA_DRQ)) 5311c6fd2807SJeff Garzik qc->err_mask |= AC_ERR_HSM; 5312c6fd2807SJeff Garzik 5313c6fd2807SJeff Garzik /* ata_pio_sectors() might change the 5314c6fd2807SJeff Garzik * state to HSM_ST_LAST. so, the state 5315c6fd2807SJeff Garzik * is changed after ata_pio_sectors(). 5316c6fd2807SJeff Garzik */ 5317c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_ERR; 5318c6fd2807SJeff Garzik goto fsm_start; 5319c6fd2807SJeff Garzik } 5320c6fd2807SJeff Garzik 5321c6fd2807SJeff Garzik ata_pio_sectors(qc); 5322c6fd2807SJeff Garzik 5323c6fd2807SJeff Garzik if (ap->hsm_task_state == HSM_ST_LAST && 5324c6fd2807SJeff Garzik (!(qc->tf.flags & ATA_TFLAG_WRITE))) { 5325c6fd2807SJeff Garzik /* all data read */ 5326c6fd2807SJeff Garzik status = ata_wait_idle(ap); 5327c6fd2807SJeff Garzik goto fsm_start; 5328c6fd2807SJeff Garzik } 5329c6fd2807SJeff Garzik } 5330c6fd2807SJeff Garzik 5331c6fd2807SJeff Garzik poll_next = 1; 5332c6fd2807SJeff Garzik break; 5333c6fd2807SJeff Garzik 5334c6fd2807SJeff Garzik case HSM_ST_LAST: 5335c6fd2807SJeff Garzik if (unlikely(!ata_ok(status))) { 5336c6fd2807SJeff Garzik qc->err_mask |= __ac_err_mask(status); 5337c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_ERR; 5338c6fd2807SJeff Garzik goto fsm_start; 5339c6fd2807SJeff Garzik } 5340c6fd2807SJeff Garzik 5341c6fd2807SJeff Garzik /* no more data to transfer */ 5342c6fd2807SJeff Garzik DPRINTK("ata%u: dev %u command complete, drv_stat 0x%x\n", 534344877b4eSTejun Heo ap->print_id, qc->dev->devno, status); 5344c6fd2807SJeff Garzik 5345c6fd2807SJeff Garzik WARN_ON(qc->err_mask); 5346c6fd2807SJeff Garzik 5347c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_IDLE; 5348c6fd2807SJeff Garzik 5349c6fd2807SJeff Garzik /* complete taskfile transaction */ 5350c6fd2807SJeff Garzik ata_hsm_qc_complete(qc, in_wq); 5351c6fd2807SJeff Garzik 5352c6fd2807SJeff Garzik poll_next = 0; 5353c6fd2807SJeff Garzik break; 5354c6fd2807SJeff Garzik 5355c6fd2807SJeff Garzik case HSM_ST_ERR: 5356c6fd2807SJeff Garzik /* make sure qc->err_mask is available to 5357c6fd2807SJeff Garzik * know what's wrong and recover 5358c6fd2807SJeff Garzik */ 5359c6fd2807SJeff Garzik WARN_ON(qc->err_mask == 0); 5360c6fd2807SJeff Garzik 5361c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_IDLE; 5362c6fd2807SJeff Garzik 5363c6fd2807SJeff Garzik /* complete taskfile transaction */ 5364c6fd2807SJeff Garzik ata_hsm_qc_complete(qc, in_wq); 5365c6fd2807SJeff Garzik 5366c6fd2807SJeff Garzik poll_next = 0; 5367c6fd2807SJeff Garzik break; 5368c6fd2807SJeff Garzik default: 5369c6fd2807SJeff Garzik poll_next = 0; 5370c6fd2807SJeff Garzik BUG(); 5371c6fd2807SJeff Garzik } 5372c6fd2807SJeff Garzik 5373c6fd2807SJeff Garzik return poll_next; 5374c6fd2807SJeff Garzik } 5375c6fd2807SJeff Garzik 537665f27f38SDavid Howells static void ata_pio_task(struct work_struct *work) 5377c6fd2807SJeff Garzik { 537865f27f38SDavid Howells struct ata_port *ap = 537965f27f38SDavid Howells container_of(work, struct ata_port, port_task.work); 538065f27f38SDavid Howells struct ata_queued_cmd *qc = ap->port_task_data; 5381c6fd2807SJeff Garzik u8 status; 5382c6fd2807SJeff Garzik int poll_next; 5383c6fd2807SJeff Garzik 5384c6fd2807SJeff Garzik fsm_start: 5385c6fd2807SJeff Garzik WARN_ON(ap->hsm_task_state == HSM_ST_IDLE); 5386c6fd2807SJeff Garzik 5387c6fd2807SJeff Garzik /* 5388c6fd2807SJeff Garzik * This is purely heuristic. This is a fast path. 5389c6fd2807SJeff Garzik * Sometimes when we enter, BSY will be cleared in 5390c6fd2807SJeff Garzik * a chk-status or two. If not, the drive is probably seeking 5391c6fd2807SJeff Garzik * or something. Snooze for a couple msecs, then 5392c6fd2807SJeff Garzik * chk-status again. If still busy, queue delayed work. 5393c6fd2807SJeff Garzik */ 5394c6fd2807SJeff Garzik status = ata_busy_wait(ap, ATA_BUSY, 5); 5395c6fd2807SJeff Garzik if (status & ATA_BUSY) { 5396c6fd2807SJeff Garzik msleep(2); 5397c6fd2807SJeff Garzik status = ata_busy_wait(ap, ATA_BUSY, 10); 5398c6fd2807SJeff Garzik if (status & ATA_BUSY) { 5399c6fd2807SJeff Garzik ata_port_queue_task(ap, ata_pio_task, qc, ATA_SHORT_PAUSE); 5400c6fd2807SJeff Garzik return; 5401c6fd2807SJeff Garzik } 5402c6fd2807SJeff Garzik } 5403c6fd2807SJeff Garzik 5404c6fd2807SJeff Garzik /* move the HSM */ 5405c6fd2807SJeff Garzik poll_next = ata_hsm_move(ap, qc, status, 1); 5406c6fd2807SJeff Garzik 5407c6fd2807SJeff Garzik /* another command or interrupt handler 5408c6fd2807SJeff Garzik * may be running at this point. 5409c6fd2807SJeff Garzik */ 5410c6fd2807SJeff Garzik if (poll_next) 5411c6fd2807SJeff Garzik goto fsm_start; 5412c6fd2807SJeff Garzik } 5413c6fd2807SJeff Garzik 5414c6fd2807SJeff Garzik /** 5415c6fd2807SJeff Garzik * ata_qc_new - Request an available ATA command, for queueing 5416c6fd2807SJeff Garzik * @ap: Port associated with device @dev 5417c6fd2807SJeff Garzik * @dev: Device from whom we request an available command structure 5418c6fd2807SJeff Garzik * 5419c6fd2807SJeff Garzik * LOCKING: 5420c6fd2807SJeff Garzik * None. 5421c6fd2807SJeff Garzik */ 5422c6fd2807SJeff Garzik 5423c6fd2807SJeff Garzik static struct ata_queued_cmd *ata_qc_new(struct ata_port *ap) 5424c6fd2807SJeff Garzik { 5425c6fd2807SJeff Garzik struct ata_queued_cmd *qc = NULL; 5426c6fd2807SJeff Garzik unsigned int i; 5427c6fd2807SJeff Garzik 5428c6fd2807SJeff Garzik /* no command while frozen */ 5429c6fd2807SJeff Garzik if (unlikely(ap->pflags & ATA_PFLAG_FROZEN)) 5430c6fd2807SJeff Garzik return NULL; 5431c6fd2807SJeff Garzik 5432c6fd2807SJeff Garzik /* the last tag is reserved for internal command. */ 5433c6fd2807SJeff Garzik for (i = 0; i < ATA_MAX_QUEUE - 1; i++) 5434c6fd2807SJeff Garzik if (!test_and_set_bit(i, &ap->qc_allocated)) { 5435c6fd2807SJeff Garzik qc = __ata_qc_from_tag(ap, i); 5436c6fd2807SJeff Garzik break; 5437c6fd2807SJeff Garzik } 5438c6fd2807SJeff Garzik 5439c6fd2807SJeff Garzik if (qc) 5440c6fd2807SJeff Garzik qc->tag = i; 5441c6fd2807SJeff Garzik 5442c6fd2807SJeff Garzik return qc; 5443c6fd2807SJeff Garzik } 5444c6fd2807SJeff Garzik 5445c6fd2807SJeff Garzik /** 5446c6fd2807SJeff Garzik * ata_qc_new_init - Request an available ATA command, and initialize it 5447c6fd2807SJeff Garzik * @dev: Device from whom we request an available command structure 5448c6fd2807SJeff Garzik * 5449c6fd2807SJeff Garzik * LOCKING: 5450c6fd2807SJeff Garzik * None. 5451c6fd2807SJeff Garzik */ 5452c6fd2807SJeff Garzik 5453c6fd2807SJeff Garzik struct ata_queued_cmd *ata_qc_new_init(struct ata_device *dev) 5454c6fd2807SJeff Garzik { 54559af5c9c9STejun Heo struct ata_port *ap = dev->link->ap; 5456c6fd2807SJeff Garzik struct ata_queued_cmd *qc; 5457c6fd2807SJeff Garzik 5458c6fd2807SJeff Garzik qc = ata_qc_new(ap); 5459c6fd2807SJeff Garzik if (qc) { 5460c6fd2807SJeff Garzik qc->scsicmd = NULL; 5461c6fd2807SJeff Garzik qc->ap = ap; 5462c6fd2807SJeff Garzik qc->dev = dev; 5463c6fd2807SJeff Garzik 5464c6fd2807SJeff Garzik ata_qc_reinit(qc); 5465c6fd2807SJeff Garzik } 5466c6fd2807SJeff Garzik 5467c6fd2807SJeff Garzik return qc; 5468c6fd2807SJeff Garzik } 5469c6fd2807SJeff Garzik 5470c6fd2807SJeff Garzik /** 5471c6fd2807SJeff Garzik * ata_qc_free - free unused ata_queued_cmd 5472c6fd2807SJeff Garzik * @qc: Command to complete 5473c6fd2807SJeff Garzik * 5474c6fd2807SJeff Garzik * Designed to free unused ata_queued_cmd object 5475c6fd2807SJeff Garzik * in case something prevents using it. 5476c6fd2807SJeff Garzik * 5477c6fd2807SJeff Garzik * LOCKING: 5478cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 5479c6fd2807SJeff Garzik */ 5480c6fd2807SJeff Garzik void ata_qc_free(struct ata_queued_cmd *qc) 5481c6fd2807SJeff Garzik { 5482c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 5483c6fd2807SJeff Garzik unsigned int tag; 5484c6fd2807SJeff Garzik 5485c6fd2807SJeff Garzik WARN_ON(qc == NULL); /* ata_qc_from_tag _might_ return NULL */ 5486c6fd2807SJeff Garzik 5487c6fd2807SJeff Garzik qc->flags = 0; 5488c6fd2807SJeff Garzik tag = qc->tag; 5489c6fd2807SJeff Garzik if (likely(ata_tag_valid(tag))) { 5490c6fd2807SJeff Garzik qc->tag = ATA_TAG_POISON; 5491c6fd2807SJeff Garzik clear_bit(tag, &ap->qc_allocated); 5492c6fd2807SJeff Garzik } 5493c6fd2807SJeff Garzik } 5494c6fd2807SJeff Garzik 5495c6fd2807SJeff Garzik void __ata_qc_complete(struct ata_queued_cmd *qc) 5496c6fd2807SJeff Garzik { 5497c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 54989af5c9c9STejun Heo struct ata_link *link = qc->dev->link; 5499c6fd2807SJeff Garzik 5500c6fd2807SJeff Garzik WARN_ON(qc == NULL); /* ata_qc_from_tag _might_ return NULL */ 5501c6fd2807SJeff Garzik WARN_ON(!(qc->flags & ATA_QCFLAG_ACTIVE)); 5502c6fd2807SJeff Garzik 5503c6fd2807SJeff Garzik if (likely(qc->flags & ATA_QCFLAG_DMAMAP)) 5504c6fd2807SJeff Garzik ata_sg_clean(qc); 5505c6fd2807SJeff Garzik 5506c6fd2807SJeff Garzik /* command should be marked inactive atomically with qc completion */ 5507da917d69STejun Heo if (qc->tf.protocol == ATA_PROT_NCQ) { 55089af5c9c9STejun Heo link->sactive &= ~(1 << qc->tag); 5509da917d69STejun Heo if (!link->sactive) 5510da917d69STejun Heo ap->nr_active_links--; 5511da917d69STejun Heo } else { 55129af5c9c9STejun Heo link->active_tag = ATA_TAG_POISON; 5513da917d69STejun Heo ap->nr_active_links--; 5514da917d69STejun Heo } 5515da917d69STejun Heo 5516da917d69STejun Heo /* clear exclusive status */ 5517da917d69STejun Heo if (unlikely(qc->flags & ATA_QCFLAG_CLEAR_EXCL && 5518da917d69STejun Heo ap->excl_link == link)) 5519da917d69STejun Heo ap->excl_link = NULL; 5520c6fd2807SJeff Garzik 5521c6fd2807SJeff Garzik /* atapi: mark qc as inactive to prevent the interrupt handler 5522c6fd2807SJeff Garzik * from completing the command twice later, before the error handler 5523c6fd2807SJeff Garzik * is called. (when rc != 0 and atapi request sense is needed) 5524c6fd2807SJeff Garzik */ 5525c6fd2807SJeff Garzik qc->flags &= ~ATA_QCFLAG_ACTIVE; 5526c6fd2807SJeff Garzik ap->qc_active &= ~(1 << qc->tag); 5527c6fd2807SJeff Garzik 5528c6fd2807SJeff Garzik /* call completion callback */ 5529c6fd2807SJeff Garzik qc->complete_fn(qc); 5530c6fd2807SJeff Garzik } 5531c6fd2807SJeff Garzik 553239599a53STejun Heo static void fill_result_tf(struct ata_queued_cmd *qc) 553339599a53STejun Heo { 553439599a53STejun Heo struct ata_port *ap = qc->ap; 553539599a53STejun Heo 553639599a53STejun Heo qc->result_tf.flags = qc->tf.flags; 55374742d54fSMark Lord ap->ops->tf_read(ap, &qc->result_tf); 553839599a53STejun Heo } 553939599a53STejun Heo 5540c6fd2807SJeff Garzik /** 5541c6fd2807SJeff Garzik * ata_qc_complete - Complete an active ATA command 5542c6fd2807SJeff Garzik * @qc: Command to complete 5543c6fd2807SJeff Garzik * @err_mask: ATA Status register contents 5544c6fd2807SJeff Garzik * 5545c6fd2807SJeff Garzik * Indicate to the mid and upper layers that an ATA 5546c6fd2807SJeff Garzik * command has completed, with either an ok or not-ok status. 5547c6fd2807SJeff Garzik * 5548c6fd2807SJeff Garzik * LOCKING: 5549cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 5550c6fd2807SJeff Garzik */ 5551c6fd2807SJeff Garzik void ata_qc_complete(struct ata_queued_cmd *qc) 5552c6fd2807SJeff Garzik { 5553c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 5554c6fd2807SJeff Garzik 5555c6fd2807SJeff Garzik /* XXX: New EH and old EH use different mechanisms to 5556c6fd2807SJeff Garzik * synchronize EH with regular execution path. 5557c6fd2807SJeff Garzik * 5558c6fd2807SJeff Garzik * In new EH, a failed qc is marked with ATA_QCFLAG_FAILED. 5559c6fd2807SJeff Garzik * Normal execution path is responsible for not accessing a 5560c6fd2807SJeff Garzik * failed qc. libata core enforces the rule by returning NULL 5561c6fd2807SJeff Garzik * from ata_qc_from_tag() for failed qcs. 5562c6fd2807SJeff Garzik * 5563c6fd2807SJeff Garzik * Old EH depends on ata_qc_complete() nullifying completion 5564c6fd2807SJeff Garzik * requests if ATA_QCFLAG_EH_SCHEDULED is set. Old EH does 5565c6fd2807SJeff Garzik * not synchronize with interrupt handler. Only PIO task is 5566c6fd2807SJeff Garzik * taken care of. 5567c6fd2807SJeff Garzik */ 5568c6fd2807SJeff Garzik if (ap->ops->error_handler) { 5569c6fd2807SJeff Garzik WARN_ON(ap->pflags & ATA_PFLAG_FROZEN); 5570c6fd2807SJeff Garzik 5571c6fd2807SJeff Garzik if (unlikely(qc->err_mask)) 5572c6fd2807SJeff Garzik qc->flags |= ATA_QCFLAG_FAILED; 5573c6fd2807SJeff Garzik 5574c6fd2807SJeff Garzik if (unlikely(qc->flags & ATA_QCFLAG_FAILED)) { 5575c6fd2807SJeff Garzik if (!ata_tag_internal(qc->tag)) { 5576c6fd2807SJeff Garzik /* always fill result TF for failed qc */ 557739599a53STejun Heo fill_result_tf(qc); 5578c6fd2807SJeff Garzik ata_qc_schedule_eh(qc); 5579c6fd2807SJeff Garzik return; 5580c6fd2807SJeff Garzik } 5581c6fd2807SJeff Garzik } 5582c6fd2807SJeff Garzik 5583c6fd2807SJeff Garzik /* read result TF if requested */ 5584c6fd2807SJeff Garzik if (qc->flags & ATA_QCFLAG_RESULT_TF) 558539599a53STejun Heo fill_result_tf(qc); 5586c6fd2807SJeff Garzik 5587c6fd2807SJeff Garzik __ata_qc_complete(qc); 5588c6fd2807SJeff Garzik } else { 5589c6fd2807SJeff Garzik if (qc->flags & ATA_QCFLAG_EH_SCHEDULED) 5590c6fd2807SJeff Garzik return; 5591c6fd2807SJeff Garzik 5592c6fd2807SJeff Garzik /* read result TF if failed or requested */ 5593c6fd2807SJeff Garzik if (qc->err_mask || qc->flags & ATA_QCFLAG_RESULT_TF) 559439599a53STejun Heo fill_result_tf(qc); 5595c6fd2807SJeff Garzik 5596c6fd2807SJeff Garzik __ata_qc_complete(qc); 5597c6fd2807SJeff Garzik } 5598c6fd2807SJeff Garzik } 5599c6fd2807SJeff Garzik 5600c6fd2807SJeff Garzik /** 5601c6fd2807SJeff Garzik * ata_qc_complete_multiple - Complete multiple qcs successfully 5602c6fd2807SJeff Garzik * @ap: port in question 5603c6fd2807SJeff Garzik * @qc_active: new qc_active mask 5604c6fd2807SJeff Garzik * @finish_qc: LLDD callback invoked before completing a qc 5605c6fd2807SJeff Garzik * 5606c6fd2807SJeff Garzik * Complete in-flight commands. This functions is meant to be 5607c6fd2807SJeff Garzik * called from low-level driver's interrupt routine to complete 5608c6fd2807SJeff Garzik * requests normally. ap->qc_active and @qc_active is compared 5609c6fd2807SJeff Garzik * and commands are completed accordingly. 5610c6fd2807SJeff Garzik * 5611c6fd2807SJeff Garzik * LOCKING: 5612cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 5613c6fd2807SJeff Garzik * 5614c6fd2807SJeff Garzik * RETURNS: 5615c6fd2807SJeff Garzik * Number of completed commands on success, -errno otherwise. 5616c6fd2807SJeff Garzik */ 5617c6fd2807SJeff Garzik int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active, 5618c6fd2807SJeff Garzik void (*finish_qc)(struct ata_queued_cmd *)) 5619c6fd2807SJeff Garzik { 5620c6fd2807SJeff Garzik int nr_done = 0; 5621c6fd2807SJeff Garzik u32 done_mask; 5622c6fd2807SJeff Garzik int i; 5623c6fd2807SJeff Garzik 5624c6fd2807SJeff Garzik done_mask = ap->qc_active ^ qc_active; 5625c6fd2807SJeff Garzik 5626c6fd2807SJeff Garzik if (unlikely(done_mask & qc_active)) { 5627c6fd2807SJeff Garzik ata_port_printk(ap, KERN_ERR, "illegal qc_active transition " 5628c6fd2807SJeff Garzik "(%08x->%08x)\n", ap->qc_active, qc_active); 5629c6fd2807SJeff Garzik return -EINVAL; 5630c6fd2807SJeff Garzik } 5631c6fd2807SJeff Garzik 5632c6fd2807SJeff Garzik for (i = 0; i < ATA_MAX_QUEUE; i++) { 5633c6fd2807SJeff Garzik struct ata_queued_cmd *qc; 5634c6fd2807SJeff Garzik 5635c6fd2807SJeff Garzik if (!(done_mask & (1 << i))) 5636c6fd2807SJeff Garzik continue; 5637c6fd2807SJeff Garzik 5638c6fd2807SJeff Garzik if ((qc = ata_qc_from_tag(ap, i))) { 5639c6fd2807SJeff Garzik if (finish_qc) 5640c6fd2807SJeff Garzik finish_qc(qc); 5641c6fd2807SJeff Garzik ata_qc_complete(qc); 5642c6fd2807SJeff Garzik nr_done++; 5643c6fd2807SJeff Garzik } 5644c6fd2807SJeff Garzik } 5645c6fd2807SJeff Garzik 5646c6fd2807SJeff Garzik return nr_done; 5647c6fd2807SJeff Garzik } 5648c6fd2807SJeff Garzik 5649c6fd2807SJeff Garzik static inline int ata_should_dma_map(struct ata_queued_cmd *qc) 5650c6fd2807SJeff Garzik { 5651c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 5652c6fd2807SJeff Garzik 5653c6fd2807SJeff Garzik switch (qc->tf.protocol) { 5654c6fd2807SJeff Garzik case ATA_PROT_NCQ: 5655c6fd2807SJeff Garzik case ATA_PROT_DMA: 5656c6fd2807SJeff Garzik case ATA_PROT_ATAPI_DMA: 5657c6fd2807SJeff Garzik return 1; 5658c6fd2807SJeff Garzik 5659c6fd2807SJeff Garzik case ATA_PROT_ATAPI: 5660c6fd2807SJeff Garzik case ATA_PROT_PIO: 5661c6fd2807SJeff Garzik if (ap->flags & ATA_FLAG_PIO_DMA) 5662c6fd2807SJeff Garzik return 1; 5663c6fd2807SJeff Garzik 5664c6fd2807SJeff Garzik /* fall through */ 5665c6fd2807SJeff Garzik 5666c6fd2807SJeff Garzik default: 5667c6fd2807SJeff Garzik return 0; 5668c6fd2807SJeff Garzik } 5669c6fd2807SJeff Garzik 5670c6fd2807SJeff Garzik /* never reached */ 5671c6fd2807SJeff Garzik } 5672c6fd2807SJeff Garzik 5673c6fd2807SJeff Garzik /** 5674c6fd2807SJeff Garzik * ata_qc_issue - issue taskfile to device 5675c6fd2807SJeff Garzik * @qc: command to issue to device 5676c6fd2807SJeff Garzik * 5677c6fd2807SJeff Garzik * Prepare an ATA command to submission to device. 5678c6fd2807SJeff Garzik * This includes mapping the data into a DMA-able 5679c6fd2807SJeff Garzik * area, filling in the S/G table, and finally 5680c6fd2807SJeff Garzik * writing the taskfile to hardware, starting the command. 5681c6fd2807SJeff Garzik * 5682c6fd2807SJeff Garzik * LOCKING: 5683cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 5684c6fd2807SJeff Garzik */ 5685c6fd2807SJeff Garzik void ata_qc_issue(struct ata_queued_cmd *qc) 5686c6fd2807SJeff Garzik { 5687c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 56889af5c9c9STejun Heo struct ata_link *link = qc->dev->link; 5689c6fd2807SJeff Garzik 5690c6fd2807SJeff Garzik /* Make sure only one non-NCQ command is outstanding. The 5691c6fd2807SJeff Garzik * check is skipped for old EH because it reuses active qc to 5692c6fd2807SJeff Garzik * request ATAPI sense. 5693c6fd2807SJeff Garzik */ 56949af5c9c9STejun Heo WARN_ON(ap->ops->error_handler && ata_tag_valid(link->active_tag)); 5695c6fd2807SJeff Garzik 5696c6fd2807SJeff Garzik if (qc->tf.protocol == ATA_PROT_NCQ) { 56979af5c9c9STejun Heo WARN_ON(link->sactive & (1 << qc->tag)); 5698da917d69STejun Heo 5699da917d69STejun Heo if (!link->sactive) 5700da917d69STejun Heo ap->nr_active_links++; 57019af5c9c9STejun Heo link->sactive |= 1 << qc->tag; 5702c6fd2807SJeff Garzik } else { 57039af5c9c9STejun Heo WARN_ON(link->sactive); 5704da917d69STejun Heo 5705da917d69STejun Heo ap->nr_active_links++; 57069af5c9c9STejun Heo link->active_tag = qc->tag; 5707c6fd2807SJeff Garzik } 5708c6fd2807SJeff Garzik 5709c6fd2807SJeff Garzik qc->flags |= ATA_QCFLAG_ACTIVE; 5710c6fd2807SJeff Garzik ap->qc_active |= 1 << qc->tag; 5711c6fd2807SJeff Garzik 5712c6fd2807SJeff Garzik if (ata_should_dma_map(qc)) { 5713c6fd2807SJeff Garzik if (qc->flags & ATA_QCFLAG_SG) { 5714c6fd2807SJeff Garzik if (ata_sg_setup(qc)) 5715c6fd2807SJeff Garzik goto sg_err; 5716c6fd2807SJeff Garzik } else if (qc->flags & ATA_QCFLAG_SINGLE) { 5717c6fd2807SJeff Garzik if (ata_sg_setup_one(qc)) 5718c6fd2807SJeff Garzik goto sg_err; 5719c6fd2807SJeff Garzik } 5720c6fd2807SJeff Garzik } else { 5721c6fd2807SJeff Garzik qc->flags &= ~ATA_QCFLAG_DMAMAP; 5722c6fd2807SJeff Garzik } 5723c6fd2807SJeff Garzik 5724c6fd2807SJeff Garzik ap->ops->qc_prep(qc); 5725c6fd2807SJeff Garzik 5726c6fd2807SJeff Garzik qc->err_mask |= ap->ops->qc_issue(qc); 5727c6fd2807SJeff Garzik if (unlikely(qc->err_mask)) 5728c6fd2807SJeff Garzik goto err; 5729c6fd2807SJeff Garzik return; 5730c6fd2807SJeff Garzik 5731c6fd2807SJeff Garzik sg_err: 5732c6fd2807SJeff Garzik qc->flags &= ~ATA_QCFLAG_DMAMAP; 5733c6fd2807SJeff Garzik qc->err_mask |= AC_ERR_SYSTEM; 5734c6fd2807SJeff Garzik err: 5735c6fd2807SJeff Garzik ata_qc_complete(qc); 5736c6fd2807SJeff Garzik } 5737c6fd2807SJeff Garzik 5738c6fd2807SJeff Garzik /** 5739c6fd2807SJeff Garzik * ata_qc_issue_prot - issue taskfile to device in proto-dependent manner 5740c6fd2807SJeff Garzik * @qc: command to issue to device 5741c6fd2807SJeff Garzik * 5742c6fd2807SJeff Garzik * Using various libata functions and hooks, this function 5743c6fd2807SJeff Garzik * starts an ATA command. ATA commands are grouped into 5744c6fd2807SJeff Garzik * classes called "protocols", and issuing each type of protocol 5745c6fd2807SJeff Garzik * is slightly different. 5746c6fd2807SJeff Garzik * 5747c6fd2807SJeff Garzik * May be used as the qc_issue() entry in ata_port_operations. 5748c6fd2807SJeff Garzik * 5749c6fd2807SJeff Garzik * LOCKING: 5750cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 5751c6fd2807SJeff Garzik * 5752c6fd2807SJeff Garzik * RETURNS: 5753c6fd2807SJeff Garzik * Zero on success, AC_ERR_* mask on failure 5754c6fd2807SJeff Garzik */ 5755c6fd2807SJeff Garzik 5756c6fd2807SJeff Garzik unsigned int ata_qc_issue_prot(struct ata_queued_cmd *qc) 5757c6fd2807SJeff Garzik { 5758c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 5759c6fd2807SJeff Garzik 5760c6fd2807SJeff Garzik /* Use polling pio if the LLD doesn't handle 5761c6fd2807SJeff Garzik * interrupt driven pio and atapi CDB interrupt. 5762c6fd2807SJeff Garzik */ 5763c6fd2807SJeff Garzik if (ap->flags & ATA_FLAG_PIO_POLLING) { 5764c6fd2807SJeff Garzik switch (qc->tf.protocol) { 5765c6fd2807SJeff Garzik case ATA_PROT_PIO: 5766e3472cbeSAlbert Lee case ATA_PROT_NODATA: 5767c6fd2807SJeff Garzik case ATA_PROT_ATAPI: 5768c6fd2807SJeff Garzik case ATA_PROT_ATAPI_NODATA: 5769c6fd2807SJeff Garzik qc->tf.flags |= ATA_TFLAG_POLLING; 5770c6fd2807SJeff Garzik break; 5771c6fd2807SJeff Garzik case ATA_PROT_ATAPI_DMA: 5772c6fd2807SJeff Garzik if (qc->dev->flags & ATA_DFLAG_CDB_INTR) 5773c6fd2807SJeff Garzik /* see ata_dma_blacklisted() */ 5774c6fd2807SJeff Garzik BUG(); 5775c6fd2807SJeff Garzik break; 5776c6fd2807SJeff Garzik default: 5777c6fd2807SJeff Garzik break; 5778c6fd2807SJeff Garzik } 5779c6fd2807SJeff Garzik } 5780c6fd2807SJeff Garzik 5781c6fd2807SJeff Garzik /* select the device */ 5782c6fd2807SJeff Garzik ata_dev_select(ap, qc->dev->devno, 1, 0); 5783c6fd2807SJeff Garzik 5784c6fd2807SJeff Garzik /* start the command */ 5785c6fd2807SJeff Garzik switch (qc->tf.protocol) { 5786c6fd2807SJeff Garzik case ATA_PROT_NODATA: 5787c6fd2807SJeff Garzik if (qc->tf.flags & ATA_TFLAG_POLLING) 5788c6fd2807SJeff Garzik ata_qc_set_polling(qc); 5789c6fd2807SJeff Garzik 5790c6fd2807SJeff Garzik ata_tf_to_host(ap, &qc->tf); 5791c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_LAST; 5792c6fd2807SJeff Garzik 5793c6fd2807SJeff Garzik if (qc->tf.flags & ATA_TFLAG_POLLING) 5794c6fd2807SJeff Garzik ata_port_queue_task(ap, ata_pio_task, qc, 0); 5795c6fd2807SJeff Garzik 5796c6fd2807SJeff Garzik break; 5797c6fd2807SJeff Garzik 5798c6fd2807SJeff Garzik case ATA_PROT_DMA: 5799c6fd2807SJeff Garzik WARN_ON(qc->tf.flags & ATA_TFLAG_POLLING); 5800c6fd2807SJeff Garzik 5801c6fd2807SJeff Garzik ap->ops->tf_load(ap, &qc->tf); /* load tf registers */ 5802c6fd2807SJeff Garzik ap->ops->bmdma_setup(qc); /* set up bmdma */ 5803c6fd2807SJeff Garzik ap->ops->bmdma_start(qc); /* initiate bmdma */ 5804c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_LAST; 5805c6fd2807SJeff Garzik break; 5806c6fd2807SJeff Garzik 5807c6fd2807SJeff Garzik case ATA_PROT_PIO: 5808c6fd2807SJeff Garzik if (qc->tf.flags & ATA_TFLAG_POLLING) 5809c6fd2807SJeff Garzik ata_qc_set_polling(qc); 5810c6fd2807SJeff Garzik 5811c6fd2807SJeff Garzik ata_tf_to_host(ap, &qc->tf); 5812c6fd2807SJeff Garzik 5813c6fd2807SJeff Garzik if (qc->tf.flags & ATA_TFLAG_WRITE) { 5814c6fd2807SJeff Garzik /* PIO data out protocol */ 5815c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_FIRST; 5816c6fd2807SJeff Garzik ata_port_queue_task(ap, ata_pio_task, qc, 0); 5817c6fd2807SJeff Garzik 5818c6fd2807SJeff Garzik /* always send first data block using 5819c6fd2807SJeff Garzik * the ata_pio_task() codepath. 5820c6fd2807SJeff Garzik */ 5821c6fd2807SJeff Garzik } else { 5822c6fd2807SJeff Garzik /* PIO data in protocol */ 5823c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST; 5824c6fd2807SJeff Garzik 5825c6fd2807SJeff Garzik if (qc->tf.flags & ATA_TFLAG_POLLING) 5826c6fd2807SJeff Garzik ata_port_queue_task(ap, ata_pio_task, qc, 0); 5827c6fd2807SJeff Garzik 5828c6fd2807SJeff Garzik /* if polling, ata_pio_task() handles the rest. 5829c6fd2807SJeff Garzik * otherwise, interrupt handler takes over from here. 5830c6fd2807SJeff Garzik */ 5831c6fd2807SJeff Garzik } 5832c6fd2807SJeff Garzik 5833c6fd2807SJeff Garzik break; 5834c6fd2807SJeff Garzik 5835c6fd2807SJeff Garzik case ATA_PROT_ATAPI: 5836c6fd2807SJeff Garzik case ATA_PROT_ATAPI_NODATA: 5837c6fd2807SJeff Garzik if (qc->tf.flags & ATA_TFLAG_POLLING) 5838c6fd2807SJeff Garzik ata_qc_set_polling(qc); 5839c6fd2807SJeff Garzik 5840c6fd2807SJeff Garzik ata_tf_to_host(ap, &qc->tf); 5841c6fd2807SJeff Garzik 5842c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_FIRST; 5843c6fd2807SJeff Garzik 5844c6fd2807SJeff Garzik /* send cdb by polling if no cdb interrupt */ 5845c6fd2807SJeff Garzik if ((!(qc->dev->flags & ATA_DFLAG_CDB_INTR)) || 5846c6fd2807SJeff Garzik (qc->tf.flags & ATA_TFLAG_POLLING)) 5847c6fd2807SJeff Garzik ata_port_queue_task(ap, ata_pio_task, qc, 0); 5848c6fd2807SJeff Garzik break; 5849c6fd2807SJeff Garzik 5850c6fd2807SJeff Garzik case ATA_PROT_ATAPI_DMA: 5851c6fd2807SJeff Garzik WARN_ON(qc->tf.flags & ATA_TFLAG_POLLING); 5852c6fd2807SJeff Garzik 5853c6fd2807SJeff Garzik ap->ops->tf_load(ap, &qc->tf); /* load tf registers */ 5854c6fd2807SJeff Garzik ap->ops->bmdma_setup(qc); /* set up bmdma */ 5855c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_FIRST; 5856c6fd2807SJeff Garzik 5857c6fd2807SJeff Garzik /* send cdb by polling if no cdb interrupt */ 5858c6fd2807SJeff Garzik if (!(qc->dev->flags & ATA_DFLAG_CDB_INTR)) 5859c6fd2807SJeff Garzik ata_port_queue_task(ap, ata_pio_task, qc, 0); 5860c6fd2807SJeff Garzik break; 5861c6fd2807SJeff Garzik 5862c6fd2807SJeff Garzik default: 5863c6fd2807SJeff Garzik WARN_ON(1); 5864c6fd2807SJeff Garzik return AC_ERR_SYSTEM; 5865c6fd2807SJeff Garzik } 5866c6fd2807SJeff Garzik 5867c6fd2807SJeff Garzik return 0; 5868c6fd2807SJeff Garzik } 5869c6fd2807SJeff Garzik 5870c6fd2807SJeff Garzik /** 5871c6fd2807SJeff Garzik * ata_host_intr - Handle host interrupt for given (port, task) 5872c6fd2807SJeff Garzik * @ap: Port on which interrupt arrived (possibly...) 5873c6fd2807SJeff Garzik * @qc: Taskfile currently active in engine 5874c6fd2807SJeff Garzik * 5875c6fd2807SJeff Garzik * Handle host interrupt for given queued command. Currently, 5876c6fd2807SJeff Garzik * only DMA interrupts are handled. All other commands are 5877c6fd2807SJeff Garzik * handled via polling with interrupts disabled (nIEN bit). 5878c6fd2807SJeff Garzik * 5879c6fd2807SJeff Garzik * LOCKING: 5880cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 5881c6fd2807SJeff Garzik * 5882c6fd2807SJeff Garzik * RETURNS: 5883c6fd2807SJeff Garzik * One if interrupt was handled, zero if not (shared irq). 5884c6fd2807SJeff Garzik */ 5885c6fd2807SJeff Garzik 5886c6fd2807SJeff Garzik inline unsigned int ata_host_intr (struct ata_port *ap, 5887c6fd2807SJeff Garzik struct ata_queued_cmd *qc) 5888c6fd2807SJeff Garzik { 58899af5c9c9STejun Heo struct ata_eh_info *ehi = &ap->link.eh_info; 5890c6fd2807SJeff Garzik u8 status, host_stat = 0; 5891c6fd2807SJeff Garzik 5892c6fd2807SJeff Garzik VPRINTK("ata%u: protocol %d task_state %d\n", 589344877b4eSTejun Heo ap->print_id, qc->tf.protocol, ap->hsm_task_state); 5894c6fd2807SJeff Garzik 5895c6fd2807SJeff Garzik /* Check whether we are expecting interrupt in this state */ 5896c6fd2807SJeff Garzik switch (ap->hsm_task_state) { 5897c6fd2807SJeff Garzik case HSM_ST_FIRST: 5898c6fd2807SJeff Garzik /* Some pre-ATAPI-4 devices assert INTRQ 5899c6fd2807SJeff Garzik * at this state when ready to receive CDB. 5900c6fd2807SJeff Garzik */ 5901c6fd2807SJeff Garzik 5902c6fd2807SJeff Garzik /* Check the ATA_DFLAG_CDB_INTR flag is enough here. 5903c6fd2807SJeff Garzik * The flag was turned on only for atapi devices. 5904c6fd2807SJeff Garzik * No need to check is_atapi_taskfile(&qc->tf) again. 5905c6fd2807SJeff Garzik */ 5906c6fd2807SJeff Garzik if (!(qc->dev->flags & ATA_DFLAG_CDB_INTR)) 5907c6fd2807SJeff Garzik goto idle_irq; 5908c6fd2807SJeff Garzik break; 5909c6fd2807SJeff Garzik case HSM_ST_LAST: 5910c6fd2807SJeff Garzik if (qc->tf.protocol == ATA_PROT_DMA || 5911c6fd2807SJeff Garzik qc->tf.protocol == ATA_PROT_ATAPI_DMA) { 5912c6fd2807SJeff Garzik /* check status of DMA engine */ 5913c6fd2807SJeff Garzik host_stat = ap->ops->bmdma_status(ap); 591444877b4eSTejun Heo VPRINTK("ata%u: host_stat 0x%X\n", 591544877b4eSTejun Heo ap->print_id, host_stat); 5916c6fd2807SJeff Garzik 5917c6fd2807SJeff Garzik /* if it's not our irq... */ 5918c6fd2807SJeff Garzik if (!(host_stat & ATA_DMA_INTR)) 5919c6fd2807SJeff Garzik goto idle_irq; 5920c6fd2807SJeff Garzik 5921c6fd2807SJeff Garzik /* before we do anything else, clear DMA-Start bit */ 5922c6fd2807SJeff Garzik ap->ops->bmdma_stop(qc); 5923c6fd2807SJeff Garzik 5924c6fd2807SJeff Garzik if (unlikely(host_stat & ATA_DMA_ERR)) { 5925c6fd2807SJeff Garzik /* error when transfering data to/from memory */ 5926c6fd2807SJeff Garzik qc->err_mask |= AC_ERR_HOST_BUS; 5927c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_ERR; 5928c6fd2807SJeff Garzik } 5929c6fd2807SJeff Garzik } 5930c6fd2807SJeff Garzik break; 5931c6fd2807SJeff Garzik case HSM_ST: 5932c6fd2807SJeff Garzik break; 5933c6fd2807SJeff Garzik default: 5934c6fd2807SJeff Garzik goto idle_irq; 5935c6fd2807SJeff Garzik } 5936c6fd2807SJeff Garzik 5937c6fd2807SJeff Garzik /* check altstatus */ 5938c6fd2807SJeff Garzik status = ata_altstatus(ap); 5939c6fd2807SJeff Garzik if (status & ATA_BUSY) 5940c6fd2807SJeff Garzik goto idle_irq; 5941c6fd2807SJeff Garzik 5942c6fd2807SJeff Garzik /* check main status, clearing INTRQ */ 5943c6fd2807SJeff Garzik status = ata_chk_status(ap); 5944c6fd2807SJeff Garzik if (unlikely(status & ATA_BUSY)) 5945c6fd2807SJeff Garzik goto idle_irq; 5946c6fd2807SJeff Garzik 5947c6fd2807SJeff Garzik /* ack bmdma irq events */ 5948c6fd2807SJeff Garzik ap->ops->irq_clear(ap); 5949c6fd2807SJeff Garzik 5950c6fd2807SJeff Garzik ata_hsm_move(ap, qc, status, 0); 5951ea54763fSTejun Heo 5952ea54763fSTejun Heo if (unlikely(qc->err_mask) && (qc->tf.protocol == ATA_PROT_DMA || 5953ea54763fSTejun Heo qc->tf.protocol == ATA_PROT_ATAPI_DMA)) 5954ea54763fSTejun Heo ata_ehi_push_desc(ehi, "BMDMA stat 0x%x", host_stat); 5955ea54763fSTejun Heo 5956c6fd2807SJeff Garzik return 1; /* irq handled */ 5957c6fd2807SJeff Garzik 5958c6fd2807SJeff Garzik idle_irq: 5959c6fd2807SJeff Garzik ap->stats.idle_irq++; 5960c6fd2807SJeff Garzik 5961c6fd2807SJeff Garzik #ifdef ATA_IRQ_TRAP 5962c6fd2807SJeff Garzik if ((ap->stats.idle_irq % 1000) == 0) { 59636d32d30fSJeff Garzik ata_chk_status(ap); 59646d32d30fSJeff Garzik ap->ops->irq_clear(ap); 5965c6fd2807SJeff Garzik ata_port_printk(ap, KERN_WARNING, "irq trap\n"); 5966c6fd2807SJeff Garzik return 1; 5967c6fd2807SJeff Garzik } 5968c6fd2807SJeff Garzik #endif 5969c6fd2807SJeff Garzik return 0; /* irq not handled */ 5970c6fd2807SJeff Garzik } 5971c6fd2807SJeff Garzik 5972c6fd2807SJeff Garzik /** 5973c6fd2807SJeff Garzik * ata_interrupt - Default ATA host interrupt handler 5974c6fd2807SJeff Garzik * @irq: irq line (unused) 5975cca3974eSJeff Garzik * @dev_instance: pointer to our ata_host information structure 5976c6fd2807SJeff Garzik * 5977c6fd2807SJeff Garzik * Default interrupt handler for PCI IDE devices. Calls 5978c6fd2807SJeff Garzik * ata_host_intr() for each port that is not disabled. 5979c6fd2807SJeff Garzik * 5980c6fd2807SJeff Garzik * LOCKING: 5981cca3974eSJeff Garzik * Obtains host lock during operation. 5982c6fd2807SJeff Garzik * 5983c6fd2807SJeff Garzik * RETURNS: 5984c6fd2807SJeff Garzik * IRQ_NONE or IRQ_HANDLED. 5985c6fd2807SJeff Garzik */ 5986c6fd2807SJeff Garzik 59877d12e780SDavid Howells irqreturn_t ata_interrupt (int irq, void *dev_instance) 5988c6fd2807SJeff Garzik { 5989cca3974eSJeff Garzik struct ata_host *host = dev_instance; 5990c6fd2807SJeff Garzik unsigned int i; 5991c6fd2807SJeff Garzik unsigned int handled = 0; 5992c6fd2807SJeff Garzik unsigned long flags; 5993c6fd2807SJeff Garzik 5994c6fd2807SJeff Garzik /* TODO: make _irqsave conditional on x86 PCI IDE legacy mode */ 5995cca3974eSJeff Garzik spin_lock_irqsave(&host->lock, flags); 5996c6fd2807SJeff Garzik 5997cca3974eSJeff Garzik for (i = 0; i < host->n_ports; i++) { 5998c6fd2807SJeff Garzik struct ata_port *ap; 5999c6fd2807SJeff Garzik 6000cca3974eSJeff Garzik ap = host->ports[i]; 6001c6fd2807SJeff Garzik if (ap && 6002c6fd2807SJeff Garzik !(ap->flags & ATA_FLAG_DISABLED)) { 6003c6fd2807SJeff Garzik struct ata_queued_cmd *qc; 6004c6fd2807SJeff Garzik 60059af5c9c9STejun Heo qc = ata_qc_from_tag(ap, ap->link.active_tag); 6006c6fd2807SJeff Garzik if (qc && (!(qc->tf.flags & ATA_TFLAG_POLLING)) && 6007c6fd2807SJeff Garzik (qc->flags & ATA_QCFLAG_ACTIVE)) 6008c6fd2807SJeff Garzik handled |= ata_host_intr(ap, qc); 6009c6fd2807SJeff Garzik } 6010c6fd2807SJeff Garzik } 6011c6fd2807SJeff Garzik 6012cca3974eSJeff Garzik spin_unlock_irqrestore(&host->lock, flags); 6013c6fd2807SJeff Garzik 6014c6fd2807SJeff Garzik return IRQ_RETVAL(handled); 6015c6fd2807SJeff Garzik } 6016c6fd2807SJeff Garzik 6017c6fd2807SJeff Garzik /** 6018c6fd2807SJeff Garzik * sata_scr_valid - test whether SCRs are accessible 6019936fd732STejun Heo * @link: ATA link to test SCR accessibility for 6020c6fd2807SJeff Garzik * 6021936fd732STejun Heo * Test whether SCRs are accessible for @link. 6022c6fd2807SJeff Garzik * 6023c6fd2807SJeff Garzik * LOCKING: 6024c6fd2807SJeff Garzik * None. 6025c6fd2807SJeff Garzik * 6026c6fd2807SJeff Garzik * RETURNS: 6027c6fd2807SJeff Garzik * 1 if SCRs are accessible, 0 otherwise. 6028c6fd2807SJeff Garzik */ 6029936fd732STejun Heo int sata_scr_valid(struct ata_link *link) 6030c6fd2807SJeff Garzik { 6031936fd732STejun Heo struct ata_port *ap = link->ap; 6032936fd732STejun Heo 6033a16abc0bSTejun Heo return (ap->flags & ATA_FLAG_SATA) && ap->ops->scr_read; 6034c6fd2807SJeff Garzik } 6035c6fd2807SJeff Garzik 6036c6fd2807SJeff Garzik /** 6037c6fd2807SJeff Garzik * sata_scr_read - read SCR register of the specified port 6038936fd732STejun Heo * @link: ATA link to read SCR for 6039c6fd2807SJeff Garzik * @reg: SCR to read 6040c6fd2807SJeff Garzik * @val: Place to store read value 6041c6fd2807SJeff Garzik * 6042936fd732STejun Heo * Read SCR register @reg of @link into *@val. This function is 6043633273a3STejun Heo * guaranteed to succeed if @link is ap->link, the cable type of 6044633273a3STejun Heo * the port is SATA and the port implements ->scr_read. 6045c6fd2807SJeff Garzik * 6046c6fd2807SJeff Garzik * LOCKING: 6047633273a3STejun Heo * None if @link is ap->link. Kernel thread context otherwise. 6048c6fd2807SJeff Garzik * 6049c6fd2807SJeff Garzik * RETURNS: 6050c6fd2807SJeff Garzik * 0 on success, negative errno on failure. 6051c6fd2807SJeff Garzik */ 6052936fd732STejun Heo int sata_scr_read(struct ata_link *link, int reg, u32 *val) 6053c6fd2807SJeff Garzik { 6054633273a3STejun Heo if (ata_is_host_link(link)) { 6055936fd732STejun Heo struct ata_port *ap = link->ap; 6056936fd732STejun Heo 6057936fd732STejun Heo if (sata_scr_valid(link)) 6058da3dbb17STejun Heo return ap->ops->scr_read(ap, reg, val); 6059c6fd2807SJeff Garzik return -EOPNOTSUPP; 6060c6fd2807SJeff Garzik } 6061c6fd2807SJeff Garzik 6062633273a3STejun Heo return sata_pmp_scr_read(link, reg, val); 6063633273a3STejun Heo } 6064633273a3STejun Heo 6065c6fd2807SJeff Garzik /** 6066c6fd2807SJeff Garzik * sata_scr_write - write SCR register of the specified port 6067936fd732STejun Heo * @link: ATA link to write SCR for 6068c6fd2807SJeff Garzik * @reg: SCR to write 6069c6fd2807SJeff Garzik * @val: value to write 6070c6fd2807SJeff Garzik * 6071936fd732STejun Heo * Write @val to SCR register @reg of @link. This function is 6072633273a3STejun Heo * guaranteed to succeed if @link is ap->link, the cable type of 6073633273a3STejun Heo * the port is SATA and the port implements ->scr_read. 6074c6fd2807SJeff Garzik * 6075c6fd2807SJeff Garzik * LOCKING: 6076633273a3STejun Heo * None if @link is ap->link. Kernel thread context otherwise. 6077c6fd2807SJeff Garzik * 6078c6fd2807SJeff Garzik * RETURNS: 6079c6fd2807SJeff Garzik * 0 on success, negative errno on failure. 6080c6fd2807SJeff Garzik */ 6081936fd732STejun Heo int sata_scr_write(struct ata_link *link, int reg, u32 val) 6082c6fd2807SJeff Garzik { 6083633273a3STejun Heo if (ata_is_host_link(link)) { 6084936fd732STejun Heo struct ata_port *ap = link->ap; 6085936fd732STejun Heo 6086936fd732STejun Heo if (sata_scr_valid(link)) 6087da3dbb17STejun Heo return ap->ops->scr_write(ap, reg, val); 6088c6fd2807SJeff Garzik return -EOPNOTSUPP; 6089c6fd2807SJeff Garzik } 6090c6fd2807SJeff Garzik 6091633273a3STejun Heo return sata_pmp_scr_write(link, reg, val); 6092633273a3STejun Heo } 6093633273a3STejun Heo 6094c6fd2807SJeff Garzik /** 6095c6fd2807SJeff Garzik * sata_scr_write_flush - write SCR register of the specified port and flush 6096936fd732STejun Heo * @link: ATA link to write SCR for 6097c6fd2807SJeff Garzik * @reg: SCR to write 6098c6fd2807SJeff Garzik * @val: value to write 6099c6fd2807SJeff Garzik * 6100c6fd2807SJeff Garzik * This function is identical to sata_scr_write() except that this 6101c6fd2807SJeff Garzik * function performs flush after writing to the register. 6102c6fd2807SJeff Garzik * 6103c6fd2807SJeff Garzik * LOCKING: 6104633273a3STejun Heo * None if @link is ap->link. Kernel thread context otherwise. 6105c6fd2807SJeff Garzik * 6106c6fd2807SJeff Garzik * RETURNS: 6107c6fd2807SJeff Garzik * 0 on success, negative errno on failure. 6108c6fd2807SJeff Garzik */ 6109936fd732STejun Heo int sata_scr_write_flush(struct ata_link *link, int reg, u32 val) 6110c6fd2807SJeff Garzik { 6111633273a3STejun Heo if (ata_is_host_link(link)) { 6112936fd732STejun Heo struct ata_port *ap = link->ap; 6113da3dbb17STejun Heo int rc; 6114da3dbb17STejun Heo 6115936fd732STejun Heo if (sata_scr_valid(link)) { 6116da3dbb17STejun Heo rc = ap->ops->scr_write(ap, reg, val); 6117da3dbb17STejun Heo if (rc == 0) 6118da3dbb17STejun Heo rc = ap->ops->scr_read(ap, reg, &val); 6119da3dbb17STejun Heo return rc; 6120c6fd2807SJeff Garzik } 6121c6fd2807SJeff Garzik return -EOPNOTSUPP; 6122c6fd2807SJeff Garzik } 6123c6fd2807SJeff Garzik 6124633273a3STejun Heo return sata_pmp_scr_write(link, reg, val); 6125633273a3STejun Heo } 6126633273a3STejun Heo 6127c6fd2807SJeff Garzik /** 6128936fd732STejun Heo * ata_link_online - test whether the given link is online 6129936fd732STejun Heo * @link: ATA link to test 6130c6fd2807SJeff Garzik * 6131936fd732STejun Heo * Test whether @link is online. Note that this function returns 6132936fd732STejun Heo * 0 if online status of @link cannot be obtained, so 6133936fd732STejun Heo * ata_link_online(link) != !ata_link_offline(link). 6134c6fd2807SJeff Garzik * 6135c6fd2807SJeff Garzik * LOCKING: 6136c6fd2807SJeff Garzik * None. 6137c6fd2807SJeff Garzik * 6138c6fd2807SJeff Garzik * RETURNS: 6139c6fd2807SJeff Garzik * 1 if the port online status is available and online. 6140c6fd2807SJeff Garzik */ 6141936fd732STejun Heo int ata_link_online(struct ata_link *link) 6142c6fd2807SJeff Garzik { 6143c6fd2807SJeff Garzik u32 sstatus; 6144c6fd2807SJeff Garzik 6145936fd732STejun Heo if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0 && 6146936fd732STejun Heo (sstatus & 0xf) == 0x3) 6147c6fd2807SJeff Garzik return 1; 6148c6fd2807SJeff Garzik return 0; 6149c6fd2807SJeff Garzik } 6150c6fd2807SJeff Garzik 6151c6fd2807SJeff Garzik /** 6152936fd732STejun Heo * ata_link_offline - test whether the given link is offline 6153936fd732STejun Heo * @link: ATA link to test 6154c6fd2807SJeff Garzik * 6155936fd732STejun Heo * Test whether @link is offline. Note that this function 6156936fd732STejun Heo * returns 0 if offline status of @link cannot be obtained, so 6157936fd732STejun Heo * ata_link_online(link) != !ata_link_offline(link). 6158c6fd2807SJeff Garzik * 6159c6fd2807SJeff Garzik * LOCKING: 6160c6fd2807SJeff Garzik * None. 6161c6fd2807SJeff Garzik * 6162c6fd2807SJeff Garzik * RETURNS: 6163c6fd2807SJeff Garzik * 1 if the port offline status is available and offline. 6164c6fd2807SJeff Garzik */ 6165936fd732STejun Heo int ata_link_offline(struct ata_link *link) 6166c6fd2807SJeff Garzik { 6167c6fd2807SJeff Garzik u32 sstatus; 6168c6fd2807SJeff Garzik 6169936fd732STejun Heo if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0 && 6170936fd732STejun Heo (sstatus & 0xf) != 0x3) 6171c6fd2807SJeff Garzik return 1; 6172c6fd2807SJeff Garzik return 0; 6173c6fd2807SJeff Garzik } 6174c6fd2807SJeff Garzik 6175c6fd2807SJeff Garzik int ata_flush_cache(struct ata_device *dev) 6176c6fd2807SJeff Garzik { 6177c6fd2807SJeff Garzik unsigned int err_mask; 6178c6fd2807SJeff Garzik u8 cmd; 6179c6fd2807SJeff Garzik 6180c6fd2807SJeff Garzik if (!ata_try_flush_cache(dev)) 6181c6fd2807SJeff Garzik return 0; 6182c6fd2807SJeff Garzik 61836fc49adbSTejun Heo if (dev->flags & ATA_DFLAG_FLUSH_EXT) 6184c6fd2807SJeff Garzik cmd = ATA_CMD_FLUSH_EXT; 6185c6fd2807SJeff Garzik else 6186c6fd2807SJeff Garzik cmd = ATA_CMD_FLUSH; 6187c6fd2807SJeff Garzik 61884f34337bSAlan Cox /* This is wrong. On a failed flush we get back the LBA of the lost 61894f34337bSAlan Cox sector and we should (assuming it wasn't aborted as unknown) issue 61904f34337bSAlan Cox a further flush command to continue the writeback until it 61914f34337bSAlan Cox does not error */ 6192c6fd2807SJeff Garzik err_mask = ata_do_simple_cmd(dev, cmd); 6193c6fd2807SJeff Garzik if (err_mask) { 6194c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_ERR, "failed to flush cache\n"); 6195c6fd2807SJeff Garzik return -EIO; 6196c6fd2807SJeff Garzik } 6197c6fd2807SJeff Garzik 6198c6fd2807SJeff Garzik return 0; 6199c6fd2807SJeff Garzik } 6200c6fd2807SJeff Garzik 62016ffa01d8STejun Heo #ifdef CONFIG_PM 6202cca3974eSJeff Garzik static int ata_host_request_pm(struct ata_host *host, pm_message_t mesg, 6203cca3974eSJeff Garzik unsigned int action, unsigned int ehi_flags, 6204cca3974eSJeff Garzik int wait) 6205c6fd2807SJeff Garzik { 6206c6fd2807SJeff Garzik unsigned long flags; 6207c6fd2807SJeff Garzik int i, rc; 6208c6fd2807SJeff Garzik 6209cca3974eSJeff Garzik for (i = 0; i < host->n_ports; i++) { 6210cca3974eSJeff Garzik struct ata_port *ap = host->ports[i]; 6211e3667ebfSTejun Heo struct ata_link *link; 6212c6fd2807SJeff Garzik 6213c6fd2807SJeff Garzik /* Previous resume operation might still be in 6214c6fd2807SJeff Garzik * progress. Wait for PM_PENDING to clear. 6215c6fd2807SJeff Garzik */ 6216c6fd2807SJeff Garzik if (ap->pflags & ATA_PFLAG_PM_PENDING) { 6217c6fd2807SJeff Garzik ata_port_wait_eh(ap); 6218c6fd2807SJeff Garzik WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING); 6219c6fd2807SJeff Garzik } 6220c6fd2807SJeff Garzik 6221c6fd2807SJeff Garzik /* request PM ops to EH */ 6222c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 6223c6fd2807SJeff Garzik 6224c6fd2807SJeff Garzik ap->pm_mesg = mesg; 6225c6fd2807SJeff Garzik if (wait) { 6226c6fd2807SJeff Garzik rc = 0; 6227c6fd2807SJeff Garzik ap->pm_result = &rc; 6228c6fd2807SJeff Garzik } 6229c6fd2807SJeff Garzik 6230c6fd2807SJeff Garzik ap->pflags |= ATA_PFLAG_PM_PENDING; 6231e3667ebfSTejun Heo __ata_port_for_each_link(link, ap) { 6232e3667ebfSTejun Heo link->eh_info.action |= action; 6233e3667ebfSTejun Heo link->eh_info.flags |= ehi_flags; 6234e3667ebfSTejun Heo } 6235c6fd2807SJeff Garzik 6236c6fd2807SJeff Garzik ata_port_schedule_eh(ap); 6237c6fd2807SJeff Garzik 6238c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 6239c6fd2807SJeff Garzik 6240c6fd2807SJeff Garzik /* wait and check result */ 6241c6fd2807SJeff Garzik if (wait) { 6242c6fd2807SJeff Garzik ata_port_wait_eh(ap); 6243c6fd2807SJeff Garzik WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING); 6244c6fd2807SJeff Garzik if (rc) 6245c6fd2807SJeff Garzik return rc; 6246c6fd2807SJeff Garzik } 6247c6fd2807SJeff Garzik } 6248c6fd2807SJeff Garzik 6249c6fd2807SJeff Garzik return 0; 6250c6fd2807SJeff Garzik } 6251c6fd2807SJeff Garzik 6252c6fd2807SJeff Garzik /** 6253cca3974eSJeff Garzik * ata_host_suspend - suspend host 6254cca3974eSJeff Garzik * @host: host to suspend 6255c6fd2807SJeff Garzik * @mesg: PM message 6256c6fd2807SJeff Garzik * 6257cca3974eSJeff Garzik * Suspend @host. Actual operation is performed by EH. This 6258c6fd2807SJeff Garzik * function requests EH to perform PM operations and waits for EH 6259c6fd2807SJeff Garzik * to finish. 6260c6fd2807SJeff Garzik * 6261c6fd2807SJeff Garzik * LOCKING: 6262c6fd2807SJeff Garzik * Kernel thread context (may sleep). 6263c6fd2807SJeff Garzik * 6264c6fd2807SJeff Garzik * RETURNS: 6265c6fd2807SJeff Garzik * 0 on success, -errno on failure. 6266c6fd2807SJeff Garzik */ 6267cca3974eSJeff Garzik int ata_host_suspend(struct ata_host *host, pm_message_t mesg) 6268c6fd2807SJeff Garzik { 62699666f400STejun Heo int rc; 6270c6fd2807SJeff Garzik 6271cca3974eSJeff Garzik rc = ata_host_request_pm(host, mesg, 0, ATA_EHI_QUIET, 1); 62729666f400STejun Heo if (rc == 0) 6273cca3974eSJeff Garzik host->dev->power.power_state = mesg; 6274c6fd2807SJeff Garzik return rc; 6275c6fd2807SJeff Garzik } 6276c6fd2807SJeff Garzik 6277c6fd2807SJeff Garzik /** 6278cca3974eSJeff Garzik * ata_host_resume - resume host 6279cca3974eSJeff Garzik * @host: host to resume 6280c6fd2807SJeff Garzik * 6281cca3974eSJeff Garzik * Resume @host. Actual operation is performed by EH. This 6282c6fd2807SJeff Garzik * function requests EH to perform PM operations and returns. 6283c6fd2807SJeff Garzik * Note that all resume operations are performed parallely. 6284c6fd2807SJeff Garzik * 6285c6fd2807SJeff Garzik * LOCKING: 6286c6fd2807SJeff Garzik * Kernel thread context (may sleep). 6287c6fd2807SJeff Garzik */ 6288cca3974eSJeff Garzik void ata_host_resume(struct ata_host *host) 6289c6fd2807SJeff Garzik { 6290cca3974eSJeff Garzik ata_host_request_pm(host, PMSG_ON, ATA_EH_SOFTRESET, 6291c6fd2807SJeff Garzik ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET, 0); 6292cca3974eSJeff Garzik host->dev->power.power_state = PMSG_ON; 6293c6fd2807SJeff Garzik } 62946ffa01d8STejun Heo #endif 6295c6fd2807SJeff Garzik 6296c6fd2807SJeff Garzik /** 6297c6fd2807SJeff Garzik * ata_port_start - Set port up for dma. 6298c6fd2807SJeff Garzik * @ap: Port to initialize 6299c6fd2807SJeff Garzik * 6300c6fd2807SJeff Garzik * Called just after data structures for each port are 6301c6fd2807SJeff Garzik * initialized. Allocates space for PRD table. 6302c6fd2807SJeff Garzik * 6303c6fd2807SJeff Garzik * May be used as the port_start() entry in ata_port_operations. 6304c6fd2807SJeff Garzik * 6305c6fd2807SJeff Garzik * LOCKING: 6306c6fd2807SJeff Garzik * Inherited from caller. 6307c6fd2807SJeff Garzik */ 6308c6fd2807SJeff Garzik int ata_port_start(struct ata_port *ap) 6309c6fd2807SJeff Garzik { 6310c6fd2807SJeff Garzik struct device *dev = ap->dev; 6311c6fd2807SJeff Garzik int rc; 6312c6fd2807SJeff Garzik 6313f0d36efdSTejun Heo ap->prd = dmam_alloc_coherent(dev, ATA_PRD_TBL_SZ, &ap->prd_dma, 6314f0d36efdSTejun Heo GFP_KERNEL); 6315c6fd2807SJeff Garzik if (!ap->prd) 6316c6fd2807SJeff Garzik return -ENOMEM; 6317c6fd2807SJeff Garzik 6318c6fd2807SJeff Garzik rc = ata_pad_alloc(ap, dev); 6319f0d36efdSTejun Heo if (rc) 6320c6fd2807SJeff Garzik return rc; 6321c6fd2807SJeff Garzik 6322f0d36efdSTejun Heo DPRINTK("prd alloc, virt %p, dma %llx\n", ap->prd, 6323f0d36efdSTejun Heo (unsigned long long)ap->prd_dma); 6324c6fd2807SJeff Garzik return 0; 6325c6fd2807SJeff Garzik } 6326c6fd2807SJeff Garzik 6327c6fd2807SJeff Garzik /** 6328c6fd2807SJeff Garzik * ata_dev_init - Initialize an ata_device structure 6329c6fd2807SJeff Garzik * @dev: Device structure to initialize 6330c6fd2807SJeff Garzik * 6331c6fd2807SJeff Garzik * Initialize @dev in preparation for probing. 6332c6fd2807SJeff Garzik * 6333c6fd2807SJeff Garzik * LOCKING: 6334c6fd2807SJeff Garzik * Inherited from caller. 6335c6fd2807SJeff Garzik */ 6336c6fd2807SJeff Garzik void ata_dev_init(struct ata_device *dev) 6337c6fd2807SJeff Garzik { 63389af5c9c9STejun Heo struct ata_link *link = dev->link; 63399af5c9c9STejun Heo struct ata_port *ap = link->ap; 6340c6fd2807SJeff Garzik unsigned long flags; 6341c6fd2807SJeff Garzik 6342c6fd2807SJeff Garzik /* SATA spd limit is bound to the first device */ 63439af5c9c9STejun Heo link->sata_spd_limit = link->hw_sata_spd_limit; 63449af5c9c9STejun Heo link->sata_spd = 0; 6345c6fd2807SJeff Garzik 6346c6fd2807SJeff Garzik /* High bits of dev->flags are used to record warm plug 6347c6fd2807SJeff Garzik * requests which occur asynchronously. Synchronize using 6348cca3974eSJeff Garzik * host lock. 6349c6fd2807SJeff Garzik */ 6350c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 6351c6fd2807SJeff Garzik dev->flags &= ~ATA_DFLAG_INIT_MASK; 63523dcc323fSTejun Heo dev->horkage = 0; 6353c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 6354c6fd2807SJeff Garzik 6355c6fd2807SJeff Garzik memset((void *)dev + ATA_DEVICE_CLEAR_OFFSET, 0, 6356c6fd2807SJeff Garzik sizeof(*dev) - ATA_DEVICE_CLEAR_OFFSET); 6357c6fd2807SJeff Garzik dev->pio_mask = UINT_MAX; 6358c6fd2807SJeff Garzik dev->mwdma_mask = UINT_MAX; 6359c6fd2807SJeff Garzik dev->udma_mask = UINT_MAX; 6360c6fd2807SJeff Garzik } 6361c6fd2807SJeff Garzik 6362c6fd2807SJeff Garzik /** 63634fb37a25STejun Heo * ata_link_init - Initialize an ata_link structure 63644fb37a25STejun Heo * @ap: ATA port link is attached to 63654fb37a25STejun Heo * @link: Link structure to initialize 63668989805dSTejun Heo * @pmp: Port multiplier port number 63674fb37a25STejun Heo * 63684fb37a25STejun Heo * Initialize @link. 63694fb37a25STejun Heo * 63704fb37a25STejun Heo * LOCKING: 63714fb37a25STejun Heo * Kernel thread context (may sleep) 63724fb37a25STejun Heo */ 6373fb7fd614STejun Heo void ata_link_init(struct ata_port *ap, struct ata_link *link, int pmp) 63744fb37a25STejun Heo { 63754fb37a25STejun Heo int i; 63764fb37a25STejun Heo 63774fb37a25STejun Heo /* clear everything except for devices */ 63784fb37a25STejun Heo memset(link, 0, offsetof(struct ata_link, device[0])); 63794fb37a25STejun Heo 63804fb37a25STejun Heo link->ap = ap; 63818989805dSTejun Heo link->pmp = pmp; 63824fb37a25STejun Heo link->active_tag = ATA_TAG_POISON; 63834fb37a25STejun Heo link->hw_sata_spd_limit = UINT_MAX; 63844fb37a25STejun Heo 63854fb37a25STejun Heo /* can't use iterator, ap isn't initialized yet */ 63864fb37a25STejun Heo for (i = 0; i < ATA_MAX_DEVICES; i++) { 63874fb37a25STejun Heo struct ata_device *dev = &link->device[i]; 63884fb37a25STejun Heo 63894fb37a25STejun Heo dev->link = link; 63904fb37a25STejun Heo dev->devno = dev - link->device; 63914fb37a25STejun Heo ata_dev_init(dev); 63924fb37a25STejun Heo } 63934fb37a25STejun Heo } 63944fb37a25STejun Heo 63954fb37a25STejun Heo /** 63964fb37a25STejun Heo * sata_link_init_spd - Initialize link->sata_spd_limit 63974fb37a25STejun Heo * @link: Link to configure sata_spd_limit for 63984fb37a25STejun Heo * 63994fb37a25STejun Heo * Initialize @link->[hw_]sata_spd_limit to the currently 64004fb37a25STejun Heo * configured value. 64014fb37a25STejun Heo * 64024fb37a25STejun Heo * LOCKING: 64034fb37a25STejun Heo * Kernel thread context (may sleep). 64044fb37a25STejun Heo * 64054fb37a25STejun Heo * RETURNS: 64064fb37a25STejun Heo * 0 on success, -errno on failure. 64074fb37a25STejun Heo */ 6408fb7fd614STejun Heo int sata_link_init_spd(struct ata_link *link) 64094fb37a25STejun Heo { 64104fb37a25STejun Heo u32 scontrol, spd; 64114fb37a25STejun Heo int rc; 64124fb37a25STejun Heo 64134fb37a25STejun Heo rc = sata_scr_read(link, SCR_CONTROL, &scontrol); 64144fb37a25STejun Heo if (rc) 64154fb37a25STejun Heo return rc; 64164fb37a25STejun Heo 64174fb37a25STejun Heo spd = (scontrol >> 4) & 0xf; 64184fb37a25STejun Heo if (spd) 64194fb37a25STejun Heo link->hw_sata_spd_limit &= (1 << spd) - 1; 64204fb37a25STejun Heo 64214fb37a25STejun Heo link->sata_spd_limit = link->hw_sata_spd_limit; 64224fb37a25STejun Heo 64234fb37a25STejun Heo return 0; 64244fb37a25STejun Heo } 64254fb37a25STejun Heo 64264fb37a25STejun Heo /** 6427f3187195STejun Heo * ata_port_alloc - allocate and initialize basic ATA port resources 6428f3187195STejun Heo * @host: ATA host this allocated port belongs to 6429c6fd2807SJeff Garzik * 6430f3187195STejun Heo * Allocate and initialize basic ATA port resources. 6431f3187195STejun Heo * 6432f3187195STejun Heo * RETURNS: 6433f3187195STejun Heo * Allocate ATA port on success, NULL on failure. 6434c6fd2807SJeff Garzik * 6435c6fd2807SJeff Garzik * LOCKING: 6436f3187195STejun Heo * Inherited from calling layer (may sleep). 6437c6fd2807SJeff Garzik */ 6438f3187195STejun Heo struct ata_port *ata_port_alloc(struct ata_host *host) 6439c6fd2807SJeff Garzik { 6440f3187195STejun Heo struct ata_port *ap; 6441c6fd2807SJeff Garzik 6442f3187195STejun Heo DPRINTK("ENTER\n"); 6443f3187195STejun Heo 6444f3187195STejun Heo ap = kzalloc(sizeof(*ap), GFP_KERNEL); 6445f3187195STejun Heo if (!ap) 6446f3187195STejun Heo return NULL; 6447f3187195STejun Heo 6448f4d6d004STejun Heo ap->pflags |= ATA_PFLAG_INITIALIZING; 6449cca3974eSJeff Garzik ap->lock = &host->lock; 6450c6fd2807SJeff Garzik ap->flags = ATA_FLAG_DISABLED; 6451f3187195STejun Heo ap->print_id = -1; 6452c6fd2807SJeff Garzik ap->ctl = ATA_DEVCTL_OBS; 6453cca3974eSJeff Garzik ap->host = host; 6454f3187195STejun Heo ap->dev = host->dev; 6455c6fd2807SJeff Garzik ap->last_ctl = 0xFF; 6456c6fd2807SJeff Garzik 6457c6fd2807SJeff Garzik #if defined(ATA_VERBOSE_DEBUG) 6458c6fd2807SJeff Garzik /* turn on all debugging levels */ 6459c6fd2807SJeff Garzik ap->msg_enable = 0x00FF; 6460c6fd2807SJeff Garzik #elif defined(ATA_DEBUG) 6461c6fd2807SJeff Garzik ap->msg_enable = ATA_MSG_DRV | ATA_MSG_INFO | ATA_MSG_CTL | ATA_MSG_WARN | ATA_MSG_ERR; 6462c6fd2807SJeff Garzik #else 6463c6fd2807SJeff Garzik ap->msg_enable = ATA_MSG_DRV | ATA_MSG_ERR | ATA_MSG_WARN; 6464c6fd2807SJeff Garzik #endif 6465c6fd2807SJeff Garzik 646665f27f38SDavid Howells INIT_DELAYED_WORK(&ap->port_task, NULL); 646765f27f38SDavid Howells INIT_DELAYED_WORK(&ap->hotplug_task, ata_scsi_hotplug); 646865f27f38SDavid Howells INIT_WORK(&ap->scsi_rescan_task, ata_scsi_dev_rescan); 6469c6fd2807SJeff Garzik INIT_LIST_HEAD(&ap->eh_done_q); 6470c6fd2807SJeff Garzik init_waitqueue_head(&ap->eh_wait_q); 64715ddf24c5STejun Heo init_timer_deferrable(&ap->fastdrain_timer); 64725ddf24c5STejun Heo ap->fastdrain_timer.function = ata_eh_fastdrain_timerfn; 64735ddf24c5STejun Heo ap->fastdrain_timer.data = (unsigned long)ap; 6474c6fd2807SJeff Garzik 6475c6fd2807SJeff Garzik ap->cbl = ATA_CBL_NONE; 6476c6fd2807SJeff Garzik 64778989805dSTejun Heo ata_link_init(ap, &ap->link, 0); 6478c6fd2807SJeff Garzik 6479c6fd2807SJeff Garzik #ifdef ATA_IRQ_TRAP 6480c6fd2807SJeff Garzik ap->stats.unhandled_irq = 1; 6481c6fd2807SJeff Garzik ap->stats.idle_irq = 1; 6482c6fd2807SJeff Garzik #endif 6483c6fd2807SJeff Garzik return ap; 6484c6fd2807SJeff Garzik } 6485c6fd2807SJeff Garzik 6486f0d36efdSTejun Heo static void ata_host_release(struct device *gendev, void *res) 6487f0d36efdSTejun Heo { 6488f0d36efdSTejun Heo struct ata_host *host = dev_get_drvdata(gendev); 6489f0d36efdSTejun Heo int i; 6490f0d36efdSTejun Heo 6491f0d36efdSTejun Heo for (i = 0; i < host->n_ports; i++) { 6492f0d36efdSTejun Heo struct ata_port *ap = host->ports[i]; 6493f0d36efdSTejun Heo 6494ecef7253STejun Heo if (!ap) 6495ecef7253STejun Heo continue; 6496ecef7253STejun Heo 6497ecef7253STejun Heo if ((host->flags & ATA_HOST_STARTED) && ap->ops->port_stop) 6498f0d36efdSTejun Heo ap->ops->port_stop(ap); 6499f0d36efdSTejun Heo } 6500f0d36efdSTejun Heo 6501ecef7253STejun Heo if ((host->flags & ATA_HOST_STARTED) && host->ops->host_stop) 6502f0d36efdSTejun Heo host->ops->host_stop(host); 65031aa56ccaSTejun Heo 65041aa506e4STejun Heo for (i = 0; i < host->n_ports; i++) { 65051aa506e4STejun Heo struct ata_port *ap = host->ports[i]; 65061aa506e4STejun Heo 65074911487aSTejun Heo if (!ap) 65084911487aSTejun Heo continue; 65094911487aSTejun Heo 65104911487aSTejun Heo if (ap->scsi_host) 65111aa506e4STejun Heo scsi_host_put(ap->scsi_host); 65121aa506e4STejun Heo 6513633273a3STejun Heo kfree(ap->pmp_link); 65144911487aSTejun Heo kfree(ap); 65151aa506e4STejun Heo host->ports[i] = NULL; 65161aa506e4STejun Heo } 65171aa506e4STejun Heo 65181aa56ccaSTejun Heo dev_set_drvdata(gendev, NULL); 6519f0d36efdSTejun Heo } 6520f0d36efdSTejun Heo 6521c6fd2807SJeff Garzik /** 6522f3187195STejun Heo * ata_host_alloc - allocate and init basic ATA host resources 6523f3187195STejun Heo * @dev: generic device this host is associated with 6524f3187195STejun Heo * @max_ports: maximum number of ATA ports associated with this host 6525f3187195STejun Heo * 6526f3187195STejun Heo * Allocate and initialize basic ATA host resources. LLD calls 6527f3187195STejun Heo * this function to allocate a host, initializes it fully and 6528f3187195STejun Heo * attaches it using ata_host_register(). 6529f3187195STejun Heo * 6530f3187195STejun Heo * @max_ports ports are allocated and host->n_ports is 6531f3187195STejun Heo * initialized to @max_ports. The caller is allowed to decrease 6532f3187195STejun Heo * host->n_ports before calling ata_host_register(). The unused 6533f3187195STejun Heo * ports will be automatically freed on registration. 6534f3187195STejun Heo * 6535f3187195STejun Heo * RETURNS: 6536f3187195STejun Heo * Allocate ATA host on success, NULL on failure. 6537f3187195STejun Heo * 6538f3187195STejun Heo * LOCKING: 6539f3187195STejun Heo * Inherited from calling layer (may sleep). 6540f3187195STejun Heo */ 6541f3187195STejun Heo struct ata_host *ata_host_alloc(struct device *dev, int max_ports) 6542f3187195STejun Heo { 6543f3187195STejun Heo struct ata_host *host; 6544f3187195STejun Heo size_t sz; 6545f3187195STejun Heo int i; 6546f3187195STejun Heo 6547f3187195STejun Heo DPRINTK("ENTER\n"); 6548f3187195STejun Heo 6549f3187195STejun Heo if (!devres_open_group(dev, NULL, GFP_KERNEL)) 6550f3187195STejun Heo return NULL; 6551f3187195STejun Heo 6552f3187195STejun Heo /* alloc a container for our list of ATA ports (buses) */ 6553f3187195STejun Heo sz = sizeof(struct ata_host) + (max_ports + 1) * sizeof(void *); 6554f3187195STejun Heo /* alloc a container for our list of ATA ports (buses) */ 6555f3187195STejun Heo host = devres_alloc(ata_host_release, sz, GFP_KERNEL); 6556f3187195STejun Heo if (!host) 6557f3187195STejun Heo goto err_out; 6558f3187195STejun Heo 6559f3187195STejun Heo devres_add(dev, host); 6560f3187195STejun Heo dev_set_drvdata(dev, host); 6561f3187195STejun Heo 6562f3187195STejun Heo spin_lock_init(&host->lock); 6563f3187195STejun Heo host->dev = dev; 6564f3187195STejun Heo host->n_ports = max_ports; 6565f3187195STejun Heo 6566f3187195STejun Heo /* allocate ports bound to this host */ 6567f3187195STejun Heo for (i = 0; i < max_ports; i++) { 6568f3187195STejun Heo struct ata_port *ap; 6569f3187195STejun Heo 6570f3187195STejun Heo ap = ata_port_alloc(host); 6571f3187195STejun Heo if (!ap) 6572f3187195STejun Heo goto err_out; 6573f3187195STejun Heo 6574f3187195STejun Heo ap->port_no = i; 6575f3187195STejun Heo host->ports[i] = ap; 6576f3187195STejun Heo } 6577f3187195STejun Heo 6578f3187195STejun Heo devres_remove_group(dev, NULL); 6579f3187195STejun Heo return host; 6580f3187195STejun Heo 6581f3187195STejun Heo err_out: 6582f3187195STejun Heo devres_release_group(dev, NULL); 6583f3187195STejun Heo return NULL; 6584f3187195STejun Heo } 6585f3187195STejun Heo 6586f3187195STejun Heo /** 6587f5cda257STejun Heo * ata_host_alloc_pinfo - alloc host and init with port_info array 6588f5cda257STejun Heo * @dev: generic device this host is associated with 6589f5cda257STejun Heo * @ppi: array of ATA port_info to initialize host with 6590f5cda257STejun Heo * @n_ports: number of ATA ports attached to this host 6591f5cda257STejun Heo * 6592f5cda257STejun Heo * Allocate ATA host and initialize with info from @ppi. If NULL 6593f5cda257STejun Heo * terminated, @ppi may contain fewer entries than @n_ports. The 6594f5cda257STejun Heo * last entry will be used for the remaining ports. 6595f5cda257STejun Heo * 6596f5cda257STejun Heo * RETURNS: 6597f5cda257STejun Heo * Allocate ATA host on success, NULL on failure. 6598f5cda257STejun Heo * 6599f5cda257STejun Heo * LOCKING: 6600f5cda257STejun Heo * Inherited from calling layer (may sleep). 6601f5cda257STejun Heo */ 6602f5cda257STejun Heo struct ata_host *ata_host_alloc_pinfo(struct device *dev, 6603f5cda257STejun Heo const struct ata_port_info * const * ppi, 6604f5cda257STejun Heo int n_ports) 6605f5cda257STejun Heo { 6606f5cda257STejun Heo const struct ata_port_info *pi; 6607f5cda257STejun Heo struct ata_host *host; 6608f5cda257STejun Heo int i, j; 6609f5cda257STejun Heo 6610f5cda257STejun Heo host = ata_host_alloc(dev, n_ports); 6611f5cda257STejun Heo if (!host) 6612f5cda257STejun Heo return NULL; 6613f5cda257STejun Heo 6614f5cda257STejun Heo for (i = 0, j = 0, pi = NULL; i < host->n_ports; i++) { 6615f5cda257STejun Heo struct ata_port *ap = host->ports[i]; 6616f5cda257STejun Heo 6617f5cda257STejun Heo if (ppi[j]) 6618f5cda257STejun Heo pi = ppi[j++]; 6619f5cda257STejun Heo 6620f5cda257STejun Heo ap->pio_mask = pi->pio_mask; 6621f5cda257STejun Heo ap->mwdma_mask = pi->mwdma_mask; 6622f5cda257STejun Heo ap->udma_mask = pi->udma_mask; 6623f5cda257STejun Heo ap->flags |= pi->flags; 66240c88758bSTejun Heo ap->link.flags |= pi->link_flags; 6625f5cda257STejun Heo ap->ops = pi->port_ops; 6626f5cda257STejun Heo 6627f5cda257STejun Heo if (!host->ops && (pi->port_ops != &ata_dummy_port_ops)) 6628f5cda257STejun Heo host->ops = pi->port_ops; 6629f5cda257STejun Heo if (!host->private_data && pi->private_data) 6630f5cda257STejun Heo host->private_data = pi->private_data; 6631f5cda257STejun Heo } 6632f5cda257STejun Heo 6633f5cda257STejun Heo return host; 6634f5cda257STejun Heo } 6635f5cda257STejun Heo 6636f5cda257STejun Heo /** 6637ecef7253STejun Heo * ata_host_start - start and freeze ports of an ATA host 6638ecef7253STejun Heo * @host: ATA host to start ports for 6639ecef7253STejun Heo * 6640ecef7253STejun Heo * Start and then freeze ports of @host. Started status is 6641ecef7253STejun Heo * recorded in host->flags, so this function can be called 6642ecef7253STejun Heo * multiple times. Ports are guaranteed to get started only 6643f3187195STejun Heo * once. If host->ops isn't initialized yet, its set to the 6644f3187195STejun Heo * first non-dummy port ops. 6645ecef7253STejun Heo * 6646ecef7253STejun Heo * LOCKING: 6647ecef7253STejun Heo * Inherited from calling layer (may sleep). 6648ecef7253STejun Heo * 6649ecef7253STejun Heo * RETURNS: 6650ecef7253STejun Heo * 0 if all ports are started successfully, -errno otherwise. 6651ecef7253STejun Heo */ 6652ecef7253STejun Heo int ata_host_start(struct ata_host *host) 6653ecef7253STejun Heo { 6654ecef7253STejun Heo int i, rc; 6655ecef7253STejun Heo 6656ecef7253STejun Heo if (host->flags & ATA_HOST_STARTED) 6657ecef7253STejun Heo return 0; 6658ecef7253STejun Heo 6659ecef7253STejun Heo for (i = 0; i < host->n_ports; i++) { 6660ecef7253STejun Heo struct ata_port *ap = host->ports[i]; 6661ecef7253STejun Heo 6662f3187195STejun Heo if (!host->ops && !ata_port_is_dummy(ap)) 6663f3187195STejun Heo host->ops = ap->ops; 6664f3187195STejun Heo 6665ecef7253STejun Heo if (ap->ops->port_start) { 6666ecef7253STejun Heo rc = ap->ops->port_start(ap); 6667ecef7253STejun Heo if (rc) { 6668ecef7253STejun Heo ata_port_printk(ap, KERN_ERR, "failed to " 6669ecef7253STejun Heo "start port (errno=%d)\n", rc); 6670ecef7253STejun Heo goto err_out; 6671ecef7253STejun Heo } 6672ecef7253STejun Heo } 6673ecef7253STejun Heo 6674ecef7253STejun Heo ata_eh_freeze_port(ap); 6675ecef7253STejun Heo } 6676ecef7253STejun Heo 6677ecef7253STejun Heo host->flags |= ATA_HOST_STARTED; 6678ecef7253STejun Heo return 0; 6679ecef7253STejun Heo 6680ecef7253STejun Heo err_out: 6681ecef7253STejun Heo while (--i >= 0) { 6682ecef7253STejun Heo struct ata_port *ap = host->ports[i]; 6683ecef7253STejun Heo 6684ecef7253STejun Heo if (ap->ops->port_stop) 6685ecef7253STejun Heo ap->ops->port_stop(ap); 6686ecef7253STejun Heo } 6687ecef7253STejun Heo return rc; 6688ecef7253STejun Heo } 6689ecef7253STejun Heo 6690ecef7253STejun Heo /** 6691cca3974eSJeff Garzik * ata_sas_host_init - Initialize a host struct 6692cca3974eSJeff Garzik * @host: host to initialize 6693cca3974eSJeff Garzik * @dev: device host is attached to 6694cca3974eSJeff Garzik * @flags: host flags 6695c6fd2807SJeff Garzik * @ops: port_ops 6696c6fd2807SJeff Garzik * 6697c6fd2807SJeff Garzik * LOCKING: 6698c6fd2807SJeff Garzik * PCI/etc. bus probe sem. 6699c6fd2807SJeff Garzik * 6700c6fd2807SJeff Garzik */ 6701f3187195STejun Heo /* KILLME - the only user left is ipr */ 6702cca3974eSJeff Garzik void ata_host_init(struct ata_host *host, struct device *dev, 6703cca3974eSJeff Garzik unsigned long flags, const struct ata_port_operations *ops) 6704c6fd2807SJeff Garzik { 6705cca3974eSJeff Garzik spin_lock_init(&host->lock); 6706cca3974eSJeff Garzik host->dev = dev; 6707cca3974eSJeff Garzik host->flags = flags; 6708cca3974eSJeff Garzik host->ops = ops; 6709c6fd2807SJeff Garzik } 6710c6fd2807SJeff Garzik 6711c6fd2807SJeff Garzik /** 6712f3187195STejun Heo * ata_host_register - register initialized ATA host 6713f3187195STejun Heo * @host: ATA host to register 6714f3187195STejun Heo * @sht: template for SCSI host 6715c6fd2807SJeff Garzik * 6716f3187195STejun Heo * Register initialized ATA host. @host is allocated using 6717f3187195STejun Heo * ata_host_alloc() and fully initialized by LLD. This function 6718f3187195STejun Heo * starts ports, registers @host with ATA and SCSI layers and 6719f3187195STejun Heo * probe registered devices. 6720c6fd2807SJeff Garzik * 6721c6fd2807SJeff Garzik * LOCKING: 6722f3187195STejun Heo * Inherited from calling layer (may sleep). 6723c6fd2807SJeff Garzik * 6724c6fd2807SJeff Garzik * RETURNS: 6725f3187195STejun Heo * 0 on success, -errno otherwise. 6726c6fd2807SJeff Garzik */ 6727f3187195STejun Heo int ata_host_register(struct ata_host *host, struct scsi_host_template *sht) 6728c6fd2807SJeff Garzik { 6729f3187195STejun Heo int i, rc; 6730c6fd2807SJeff Garzik 6731f3187195STejun Heo /* host must have been started */ 6732f3187195STejun Heo if (!(host->flags & ATA_HOST_STARTED)) { 6733f3187195STejun Heo dev_printk(KERN_ERR, host->dev, 6734f3187195STejun Heo "BUG: trying to register unstarted host\n"); 6735f3187195STejun Heo WARN_ON(1); 6736f3187195STejun Heo return -EINVAL; 673702f076aaSAlan Cox } 6738f0d36efdSTejun Heo 6739f3187195STejun Heo /* Blow away unused ports. This happens when LLD can't 6740f3187195STejun Heo * determine the exact number of ports to allocate at 6741f3187195STejun Heo * allocation time. 6742f3187195STejun Heo */ 6743f3187195STejun Heo for (i = host->n_ports; host->ports[i]; i++) 6744f3187195STejun Heo kfree(host->ports[i]); 6745f0d36efdSTejun Heo 6746f3187195STejun Heo /* give ports names and add SCSI hosts */ 6747f3187195STejun Heo for (i = 0; i < host->n_ports; i++) 6748f3187195STejun Heo host->ports[i]->print_id = ata_print_id++; 6749c6fd2807SJeff Garzik 6750f3187195STejun Heo rc = ata_scsi_add_hosts(host, sht); 6751ecef7253STejun Heo if (rc) 6752f3187195STejun Heo return rc; 6753ecef7253STejun Heo 6754fafbae87STejun Heo /* associate with ACPI nodes */ 6755fafbae87STejun Heo ata_acpi_associate(host); 6756fafbae87STejun Heo 6757f3187195STejun Heo /* set cable, sata_spd_limit and report */ 6758cca3974eSJeff Garzik for (i = 0; i < host->n_ports; i++) { 6759cca3974eSJeff Garzik struct ata_port *ap = host->ports[i]; 6760f3187195STejun Heo unsigned long xfer_mask; 6761f3187195STejun Heo 6762f3187195STejun Heo /* set SATA cable type if still unset */ 6763f3187195STejun Heo if (ap->cbl == ATA_CBL_NONE && (ap->flags & ATA_FLAG_SATA)) 6764f3187195STejun Heo ap->cbl = ATA_CBL_SATA; 6765c6fd2807SJeff Garzik 6766c6fd2807SJeff Garzik /* init sata_spd_limit to the current value */ 67674fb37a25STejun Heo sata_link_init_spd(&ap->link); 6768c6fd2807SJeff Garzik 6769cbcdd875STejun Heo /* print per-port info to dmesg */ 6770f3187195STejun Heo xfer_mask = ata_pack_xfermask(ap->pio_mask, ap->mwdma_mask, 6771f3187195STejun Heo ap->udma_mask); 6772f3187195STejun Heo 6773f3187195STejun Heo if (!ata_port_is_dummy(ap)) 6774cbcdd875STejun Heo ata_port_printk(ap, KERN_INFO, 6775cbcdd875STejun Heo "%cATA max %s %s\n", 6776a16abc0bSTejun Heo (ap->flags & ATA_FLAG_SATA) ? 'S' : 'P', 6777f3187195STejun Heo ata_mode_string(xfer_mask), 6778cbcdd875STejun Heo ap->link.eh_info.desc); 6779f3187195STejun Heo else 6780f3187195STejun Heo ata_port_printk(ap, KERN_INFO, "DUMMY\n"); 6781c6fd2807SJeff Garzik } 6782c6fd2807SJeff Garzik 6783f3187195STejun Heo /* perform each probe synchronously */ 6784f3187195STejun Heo DPRINTK("probe begin\n"); 6785f3187195STejun Heo for (i = 0; i < host->n_ports; i++) { 6786f3187195STejun Heo struct ata_port *ap = host->ports[i]; 6787f3187195STejun Heo int rc; 6788f3187195STejun Heo 6789f3187195STejun Heo /* probe */ 6790c6fd2807SJeff Garzik if (ap->ops->error_handler) { 67919af5c9c9STejun Heo struct ata_eh_info *ehi = &ap->link.eh_info; 6792c6fd2807SJeff Garzik unsigned long flags; 6793c6fd2807SJeff Garzik 6794c6fd2807SJeff Garzik ata_port_probe(ap); 6795c6fd2807SJeff Garzik 6796c6fd2807SJeff Garzik /* kick EH for boot probing */ 6797c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 6798c6fd2807SJeff Garzik 6799f58229f8STejun Heo ehi->probe_mask = 6800f58229f8STejun Heo (1 << ata_link_max_devices(&ap->link)) - 1; 6801c6fd2807SJeff Garzik ehi->action |= ATA_EH_SOFTRESET; 6802c6fd2807SJeff Garzik ehi->flags |= ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET; 6803c6fd2807SJeff Garzik 6804f4d6d004STejun Heo ap->pflags &= ~ATA_PFLAG_INITIALIZING; 6805c6fd2807SJeff Garzik ap->pflags |= ATA_PFLAG_LOADING; 6806c6fd2807SJeff Garzik ata_port_schedule_eh(ap); 6807c6fd2807SJeff Garzik 6808c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 6809c6fd2807SJeff Garzik 6810c6fd2807SJeff Garzik /* wait for EH to finish */ 6811c6fd2807SJeff Garzik ata_port_wait_eh(ap); 6812c6fd2807SJeff Garzik } else { 681344877b4eSTejun Heo DPRINTK("ata%u: bus probe begin\n", ap->print_id); 6814c6fd2807SJeff Garzik rc = ata_bus_probe(ap); 681544877b4eSTejun Heo DPRINTK("ata%u: bus probe end\n", ap->print_id); 6816c6fd2807SJeff Garzik 6817c6fd2807SJeff Garzik if (rc) { 6818c6fd2807SJeff Garzik /* FIXME: do something useful here? 6819c6fd2807SJeff Garzik * Current libata behavior will 6820c6fd2807SJeff Garzik * tear down everything when 6821c6fd2807SJeff Garzik * the module is removed 6822c6fd2807SJeff Garzik * or the h/w is unplugged. 6823c6fd2807SJeff Garzik */ 6824c6fd2807SJeff Garzik } 6825c6fd2807SJeff Garzik } 6826c6fd2807SJeff Garzik } 6827c6fd2807SJeff Garzik 6828c6fd2807SJeff Garzik /* probes are done, now scan each port's disk(s) */ 6829c6fd2807SJeff Garzik DPRINTK("host probe begin\n"); 6830cca3974eSJeff Garzik for (i = 0; i < host->n_ports; i++) { 6831cca3974eSJeff Garzik struct ata_port *ap = host->ports[i]; 6832c6fd2807SJeff Garzik 68331ae46317STejun Heo ata_scsi_scan_host(ap, 1); 6834c6fd2807SJeff Garzik } 6835c6fd2807SJeff Garzik 6836f3187195STejun Heo return 0; 6837f3187195STejun Heo } 6838f3187195STejun Heo 6839f3187195STejun Heo /** 6840f5cda257STejun Heo * ata_host_activate - start host, request IRQ and register it 6841f5cda257STejun Heo * @host: target ATA host 6842f5cda257STejun Heo * @irq: IRQ to request 6843f5cda257STejun Heo * @irq_handler: irq_handler used when requesting IRQ 6844f5cda257STejun Heo * @irq_flags: irq_flags used when requesting IRQ 6845f5cda257STejun Heo * @sht: scsi_host_template to use when registering the host 6846f5cda257STejun Heo * 6847f5cda257STejun Heo * After allocating an ATA host and initializing it, most libata 6848f5cda257STejun Heo * LLDs perform three steps to activate the host - start host, 6849f5cda257STejun Heo * request IRQ and register it. This helper takes necessasry 6850f5cda257STejun Heo * arguments and performs the three steps in one go. 6851f5cda257STejun Heo * 6852f5cda257STejun Heo * LOCKING: 6853f5cda257STejun Heo * Inherited from calling layer (may sleep). 6854f5cda257STejun Heo * 6855f5cda257STejun Heo * RETURNS: 6856f5cda257STejun Heo * 0 on success, -errno otherwise. 6857f5cda257STejun Heo */ 6858f5cda257STejun Heo int ata_host_activate(struct ata_host *host, int irq, 6859f5cda257STejun Heo irq_handler_t irq_handler, unsigned long irq_flags, 6860f5cda257STejun Heo struct scsi_host_template *sht) 6861f5cda257STejun Heo { 6862cbcdd875STejun Heo int i, rc; 6863f5cda257STejun Heo 6864f5cda257STejun Heo rc = ata_host_start(host); 6865f5cda257STejun Heo if (rc) 6866f5cda257STejun Heo return rc; 6867f5cda257STejun Heo 6868f5cda257STejun Heo rc = devm_request_irq(host->dev, irq, irq_handler, irq_flags, 6869f5cda257STejun Heo dev_driver_string(host->dev), host); 6870f5cda257STejun Heo if (rc) 6871f5cda257STejun Heo return rc; 6872f5cda257STejun Heo 6873cbcdd875STejun Heo for (i = 0; i < host->n_ports; i++) 6874cbcdd875STejun Heo ata_port_desc(host->ports[i], "irq %d", irq); 68754031826bSTejun Heo 6876f5cda257STejun Heo rc = ata_host_register(host, sht); 6877f5cda257STejun Heo /* if failed, just free the IRQ and leave ports alone */ 6878f5cda257STejun Heo if (rc) 6879f5cda257STejun Heo devm_free_irq(host->dev, irq, host); 6880f5cda257STejun Heo 6881f5cda257STejun Heo return rc; 6882f5cda257STejun Heo } 6883f5cda257STejun Heo 6884f5cda257STejun Heo /** 6885c6fd2807SJeff Garzik * ata_port_detach - Detach ATA port in prepration of device removal 6886c6fd2807SJeff Garzik * @ap: ATA port to be detached 6887c6fd2807SJeff Garzik * 6888c6fd2807SJeff Garzik * Detach all ATA devices and the associated SCSI devices of @ap; 6889c6fd2807SJeff Garzik * then, remove the associated SCSI host. @ap is guaranteed to 6890c6fd2807SJeff Garzik * be quiescent on return from this function. 6891c6fd2807SJeff Garzik * 6892c6fd2807SJeff Garzik * LOCKING: 6893c6fd2807SJeff Garzik * Kernel thread context (may sleep). 6894c6fd2807SJeff Garzik */ 6895c6fd2807SJeff Garzik void ata_port_detach(struct ata_port *ap) 6896c6fd2807SJeff Garzik { 6897c6fd2807SJeff Garzik unsigned long flags; 689841bda9c9STejun Heo struct ata_link *link; 6899f58229f8STejun Heo struct ata_device *dev; 6900c6fd2807SJeff Garzik 6901c6fd2807SJeff Garzik if (!ap->ops->error_handler) 6902c6fd2807SJeff Garzik goto skip_eh; 6903c6fd2807SJeff Garzik 6904c6fd2807SJeff Garzik /* tell EH we're leaving & flush EH */ 6905c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 6906c6fd2807SJeff Garzik ap->pflags |= ATA_PFLAG_UNLOADING; 6907c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 6908c6fd2807SJeff Garzik 6909c6fd2807SJeff Garzik ata_port_wait_eh(ap); 6910c6fd2807SJeff Garzik 6911c6fd2807SJeff Garzik /* EH is now guaranteed to see UNLOADING, so no new device 6912c6fd2807SJeff Garzik * will be attached. Disable all existing devices. 6913c6fd2807SJeff Garzik */ 6914c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 6915c6fd2807SJeff Garzik 691641bda9c9STejun Heo ata_port_for_each_link(link, ap) { 691741bda9c9STejun Heo ata_link_for_each_dev(dev, link) 6918f58229f8STejun Heo ata_dev_disable(dev); 691941bda9c9STejun Heo } 6920c6fd2807SJeff Garzik 6921c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 6922c6fd2807SJeff Garzik 6923c6fd2807SJeff Garzik /* Final freeze & EH. All in-flight commands are aborted. EH 6924c6fd2807SJeff Garzik * will be skipped and retrials will be terminated with bad 6925c6fd2807SJeff Garzik * target. 6926c6fd2807SJeff Garzik */ 6927c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 6928c6fd2807SJeff Garzik ata_port_freeze(ap); /* won't be thawed */ 6929c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 6930c6fd2807SJeff Garzik 6931c6fd2807SJeff Garzik ata_port_wait_eh(ap); 693245a66c1cSOleg Nesterov cancel_rearming_delayed_work(&ap->hotplug_task); 6933c6fd2807SJeff Garzik 6934c6fd2807SJeff Garzik skip_eh: 6935c6fd2807SJeff Garzik /* remove the associated SCSI host */ 6936cca3974eSJeff Garzik scsi_remove_host(ap->scsi_host); 6937c6fd2807SJeff Garzik } 6938c6fd2807SJeff Garzik 6939c6fd2807SJeff Garzik /** 69400529c159STejun Heo * ata_host_detach - Detach all ports of an ATA host 69410529c159STejun Heo * @host: Host to detach 69420529c159STejun Heo * 69430529c159STejun Heo * Detach all ports of @host. 69440529c159STejun Heo * 69450529c159STejun Heo * LOCKING: 69460529c159STejun Heo * Kernel thread context (may sleep). 69470529c159STejun Heo */ 69480529c159STejun Heo void ata_host_detach(struct ata_host *host) 69490529c159STejun Heo { 69500529c159STejun Heo int i; 69510529c159STejun Heo 69520529c159STejun Heo for (i = 0; i < host->n_ports; i++) 69530529c159STejun Heo ata_port_detach(host->ports[i]); 69540529c159STejun Heo } 69550529c159STejun Heo 6956c6fd2807SJeff Garzik /** 6957c6fd2807SJeff Garzik * ata_std_ports - initialize ioaddr with standard port offsets. 6958c6fd2807SJeff Garzik * @ioaddr: IO address structure to be initialized 6959c6fd2807SJeff Garzik * 6960c6fd2807SJeff Garzik * Utility function which initializes data_addr, error_addr, 6961c6fd2807SJeff Garzik * feature_addr, nsect_addr, lbal_addr, lbam_addr, lbah_addr, 6962c6fd2807SJeff Garzik * device_addr, status_addr, and command_addr to standard offsets 6963c6fd2807SJeff Garzik * relative to cmd_addr. 6964c6fd2807SJeff Garzik * 6965c6fd2807SJeff Garzik * Does not set ctl_addr, altstatus_addr, bmdma_addr, or scr_addr. 6966c6fd2807SJeff Garzik */ 6967c6fd2807SJeff Garzik 6968c6fd2807SJeff Garzik void ata_std_ports(struct ata_ioports *ioaddr) 6969c6fd2807SJeff Garzik { 6970c6fd2807SJeff Garzik ioaddr->data_addr = ioaddr->cmd_addr + ATA_REG_DATA; 6971c6fd2807SJeff Garzik ioaddr->error_addr = ioaddr->cmd_addr + ATA_REG_ERR; 6972c6fd2807SJeff Garzik ioaddr->feature_addr = ioaddr->cmd_addr + ATA_REG_FEATURE; 6973c6fd2807SJeff Garzik ioaddr->nsect_addr = ioaddr->cmd_addr + ATA_REG_NSECT; 6974c6fd2807SJeff Garzik ioaddr->lbal_addr = ioaddr->cmd_addr + ATA_REG_LBAL; 6975c6fd2807SJeff Garzik ioaddr->lbam_addr = ioaddr->cmd_addr + ATA_REG_LBAM; 6976c6fd2807SJeff Garzik ioaddr->lbah_addr = ioaddr->cmd_addr + ATA_REG_LBAH; 6977c6fd2807SJeff Garzik ioaddr->device_addr = ioaddr->cmd_addr + ATA_REG_DEVICE; 6978c6fd2807SJeff Garzik ioaddr->status_addr = ioaddr->cmd_addr + ATA_REG_STATUS; 6979c6fd2807SJeff Garzik ioaddr->command_addr = ioaddr->cmd_addr + ATA_REG_CMD; 6980c6fd2807SJeff Garzik } 6981c6fd2807SJeff Garzik 6982c6fd2807SJeff Garzik 6983c6fd2807SJeff Garzik #ifdef CONFIG_PCI 6984c6fd2807SJeff Garzik 6985c6fd2807SJeff Garzik /** 6986c6fd2807SJeff Garzik * ata_pci_remove_one - PCI layer callback for device removal 6987c6fd2807SJeff Garzik * @pdev: PCI device that was removed 6988c6fd2807SJeff Garzik * 6989b878ca5dSTejun Heo * PCI layer indicates to libata via this hook that hot-unplug or 6990b878ca5dSTejun Heo * module unload event has occurred. Detach all ports. Resource 6991b878ca5dSTejun Heo * release is handled via devres. 6992c6fd2807SJeff Garzik * 6993c6fd2807SJeff Garzik * LOCKING: 6994c6fd2807SJeff Garzik * Inherited from PCI layer (may sleep). 6995c6fd2807SJeff Garzik */ 6996c6fd2807SJeff Garzik void ata_pci_remove_one(struct pci_dev *pdev) 6997c6fd2807SJeff Garzik { 6998c6fd2807SJeff Garzik struct device *dev = pci_dev_to_dev(pdev); 6999cca3974eSJeff Garzik struct ata_host *host = dev_get_drvdata(dev); 7000c6fd2807SJeff Garzik 7001f0d36efdSTejun Heo ata_host_detach(host); 7002c6fd2807SJeff Garzik } 7003c6fd2807SJeff Garzik 7004c6fd2807SJeff Garzik /* move to PCI subsystem */ 7005c6fd2807SJeff Garzik int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits) 7006c6fd2807SJeff Garzik { 7007c6fd2807SJeff Garzik unsigned long tmp = 0; 7008c6fd2807SJeff Garzik 7009c6fd2807SJeff Garzik switch (bits->width) { 7010c6fd2807SJeff Garzik case 1: { 7011c6fd2807SJeff Garzik u8 tmp8 = 0; 7012c6fd2807SJeff Garzik pci_read_config_byte(pdev, bits->reg, &tmp8); 7013c6fd2807SJeff Garzik tmp = tmp8; 7014c6fd2807SJeff Garzik break; 7015c6fd2807SJeff Garzik } 7016c6fd2807SJeff Garzik case 2: { 7017c6fd2807SJeff Garzik u16 tmp16 = 0; 7018c6fd2807SJeff Garzik pci_read_config_word(pdev, bits->reg, &tmp16); 7019c6fd2807SJeff Garzik tmp = tmp16; 7020c6fd2807SJeff Garzik break; 7021c6fd2807SJeff Garzik } 7022c6fd2807SJeff Garzik case 4: { 7023c6fd2807SJeff Garzik u32 tmp32 = 0; 7024c6fd2807SJeff Garzik pci_read_config_dword(pdev, bits->reg, &tmp32); 7025c6fd2807SJeff Garzik tmp = tmp32; 7026c6fd2807SJeff Garzik break; 7027c6fd2807SJeff Garzik } 7028c6fd2807SJeff Garzik 7029c6fd2807SJeff Garzik default: 7030c6fd2807SJeff Garzik return -EINVAL; 7031c6fd2807SJeff Garzik } 7032c6fd2807SJeff Garzik 7033c6fd2807SJeff Garzik tmp &= bits->mask; 7034c6fd2807SJeff Garzik 7035c6fd2807SJeff Garzik return (tmp == bits->val) ? 1 : 0; 7036c6fd2807SJeff Garzik } 7037c6fd2807SJeff Garzik 70386ffa01d8STejun Heo #ifdef CONFIG_PM 7039c6fd2807SJeff Garzik void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg) 7040c6fd2807SJeff Garzik { 7041c6fd2807SJeff Garzik pci_save_state(pdev); 7042c6fd2807SJeff Garzik pci_disable_device(pdev); 70434c90d971STejun Heo 70444c90d971STejun Heo if (mesg.event == PM_EVENT_SUSPEND) 7045c6fd2807SJeff Garzik pci_set_power_state(pdev, PCI_D3hot); 7046c6fd2807SJeff Garzik } 7047c6fd2807SJeff Garzik 7048553c4aa6STejun Heo int ata_pci_device_do_resume(struct pci_dev *pdev) 7049c6fd2807SJeff Garzik { 7050553c4aa6STejun Heo int rc; 7051553c4aa6STejun Heo 7052c6fd2807SJeff Garzik pci_set_power_state(pdev, PCI_D0); 7053c6fd2807SJeff Garzik pci_restore_state(pdev); 7054553c4aa6STejun Heo 7055f0d36efdSTejun Heo rc = pcim_enable_device(pdev); 7056553c4aa6STejun Heo if (rc) { 7057553c4aa6STejun Heo dev_printk(KERN_ERR, &pdev->dev, 7058553c4aa6STejun Heo "failed to enable device after resume (%d)\n", rc); 7059553c4aa6STejun Heo return rc; 7060553c4aa6STejun Heo } 7061553c4aa6STejun Heo 7062c6fd2807SJeff Garzik pci_set_master(pdev); 7063553c4aa6STejun Heo return 0; 7064c6fd2807SJeff Garzik } 7065c6fd2807SJeff Garzik 7066c6fd2807SJeff Garzik int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg) 7067c6fd2807SJeff Garzik { 7068cca3974eSJeff Garzik struct ata_host *host = dev_get_drvdata(&pdev->dev); 7069c6fd2807SJeff Garzik int rc = 0; 7070c6fd2807SJeff Garzik 7071cca3974eSJeff Garzik rc = ata_host_suspend(host, mesg); 7072c6fd2807SJeff Garzik if (rc) 7073c6fd2807SJeff Garzik return rc; 7074c6fd2807SJeff Garzik 7075c6fd2807SJeff Garzik ata_pci_device_do_suspend(pdev, mesg); 7076c6fd2807SJeff Garzik 7077c6fd2807SJeff Garzik return 0; 7078c6fd2807SJeff Garzik } 7079c6fd2807SJeff Garzik 7080c6fd2807SJeff Garzik int ata_pci_device_resume(struct pci_dev *pdev) 7081c6fd2807SJeff Garzik { 7082cca3974eSJeff Garzik struct ata_host *host = dev_get_drvdata(&pdev->dev); 7083553c4aa6STejun Heo int rc; 7084c6fd2807SJeff Garzik 7085553c4aa6STejun Heo rc = ata_pci_device_do_resume(pdev); 7086553c4aa6STejun Heo if (rc == 0) 7087cca3974eSJeff Garzik ata_host_resume(host); 7088553c4aa6STejun Heo return rc; 7089c6fd2807SJeff Garzik } 70906ffa01d8STejun Heo #endif /* CONFIG_PM */ 70916ffa01d8STejun Heo 7092c6fd2807SJeff Garzik #endif /* CONFIG_PCI */ 7093c6fd2807SJeff Garzik 7094c6fd2807SJeff Garzik 7095c6fd2807SJeff Garzik static int __init ata_init(void) 7096c6fd2807SJeff Garzik { 7097c6fd2807SJeff Garzik ata_probe_timeout *= HZ; 7098c6fd2807SJeff Garzik ata_wq = create_workqueue("ata"); 7099c6fd2807SJeff Garzik if (!ata_wq) 7100c6fd2807SJeff Garzik return -ENOMEM; 7101c6fd2807SJeff Garzik 7102c6fd2807SJeff Garzik ata_aux_wq = create_singlethread_workqueue("ata_aux"); 7103c6fd2807SJeff Garzik if (!ata_aux_wq) { 7104c6fd2807SJeff Garzik destroy_workqueue(ata_wq); 7105c6fd2807SJeff Garzik return -ENOMEM; 7106c6fd2807SJeff Garzik } 7107c6fd2807SJeff Garzik 7108c6fd2807SJeff Garzik printk(KERN_DEBUG "libata version " DRV_VERSION " loaded.\n"); 7109c6fd2807SJeff Garzik return 0; 7110c6fd2807SJeff Garzik } 7111c6fd2807SJeff Garzik 7112c6fd2807SJeff Garzik static void __exit ata_exit(void) 7113c6fd2807SJeff Garzik { 7114c6fd2807SJeff Garzik destroy_workqueue(ata_wq); 7115c6fd2807SJeff Garzik destroy_workqueue(ata_aux_wq); 7116c6fd2807SJeff Garzik } 7117c6fd2807SJeff Garzik 7118a4625085SBrian King subsys_initcall(ata_init); 7119c6fd2807SJeff Garzik module_exit(ata_exit); 7120c6fd2807SJeff Garzik 7121c6fd2807SJeff Garzik static unsigned long ratelimit_time; 7122c6fd2807SJeff Garzik static DEFINE_SPINLOCK(ata_ratelimit_lock); 7123c6fd2807SJeff Garzik 7124c6fd2807SJeff Garzik int ata_ratelimit(void) 7125c6fd2807SJeff Garzik { 7126c6fd2807SJeff Garzik int rc; 7127c6fd2807SJeff Garzik unsigned long flags; 7128c6fd2807SJeff Garzik 7129c6fd2807SJeff Garzik spin_lock_irqsave(&ata_ratelimit_lock, flags); 7130c6fd2807SJeff Garzik 7131c6fd2807SJeff Garzik if (time_after(jiffies, ratelimit_time)) { 7132c6fd2807SJeff Garzik rc = 1; 7133c6fd2807SJeff Garzik ratelimit_time = jiffies + (HZ/5); 7134c6fd2807SJeff Garzik } else 7135c6fd2807SJeff Garzik rc = 0; 7136c6fd2807SJeff Garzik 7137c6fd2807SJeff Garzik spin_unlock_irqrestore(&ata_ratelimit_lock, flags); 7138c6fd2807SJeff Garzik 7139c6fd2807SJeff Garzik return rc; 7140c6fd2807SJeff Garzik } 7141c6fd2807SJeff Garzik 7142c6fd2807SJeff Garzik /** 7143c6fd2807SJeff Garzik * ata_wait_register - wait until register value changes 7144c6fd2807SJeff Garzik * @reg: IO-mapped register 7145c6fd2807SJeff Garzik * @mask: Mask to apply to read register value 7146c6fd2807SJeff Garzik * @val: Wait condition 7147c6fd2807SJeff Garzik * @interval_msec: polling interval in milliseconds 7148c6fd2807SJeff Garzik * @timeout_msec: timeout in milliseconds 7149c6fd2807SJeff Garzik * 7150c6fd2807SJeff Garzik * Waiting for some bits of register to change is a common 7151c6fd2807SJeff Garzik * operation for ATA controllers. This function reads 32bit LE 7152c6fd2807SJeff Garzik * IO-mapped register @reg and tests for the following condition. 7153c6fd2807SJeff Garzik * 7154c6fd2807SJeff Garzik * (*@reg & mask) != val 7155c6fd2807SJeff Garzik * 7156c6fd2807SJeff Garzik * If the condition is met, it returns; otherwise, the process is 7157c6fd2807SJeff Garzik * repeated after @interval_msec until timeout. 7158c6fd2807SJeff Garzik * 7159c6fd2807SJeff Garzik * LOCKING: 7160c6fd2807SJeff Garzik * Kernel thread context (may sleep) 7161c6fd2807SJeff Garzik * 7162c6fd2807SJeff Garzik * RETURNS: 7163c6fd2807SJeff Garzik * The final register value. 7164c6fd2807SJeff Garzik */ 7165c6fd2807SJeff Garzik u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val, 7166c6fd2807SJeff Garzik unsigned long interval_msec, 7167c6fd2807SJeff Garzik unsigned long timeout_msec) 7168c6fd2807SJeff Garzik { 7169c6fd2807SJeff Garzik unsigned long timeout; 7170c6fd2807SJeff Garzik u32 tmp; 7171c6fd2807SJeff Garzik 7172c6fd2807SJeff Garzik tmp = ioread32(reg); 7173c6fd2807SJeff Garzik 7174c6fd2807SJeff Garzik /* Calculate timeout _after_ the first read to make sure 7175c6fd2807SJeff Garzik * preceding writes reach the controller before starting to 7176c6fd2807SJeff Garzik * eat away the timeout. 7177c6fd2807SJeff Garzik */ 7178c6fd2807SJeff Garzik timeout = jiffies + (timeout_msec * HZ) / 1000; 7179c6fd2807SJeff Garzik 7180c6fd2807SJeff Garzik while ((tmp & mask) == val && time_before(jiffies, timeout)) { 7181c6fd2807SJeff Garzik msleep(interval_msec); 7182c6fd2807SJeff Garzik tmp = ioread32(reg); 7183c6fd2807SJeff Garzik } 7184c6fd2807SJeff Garzik 7185c6fd2807SJeff Garzik return tmp; 7186c6fd2807SJeff Garzik } 7187c6fd2807SJeff Garzik 7188c6fd2807SJeff Garzik /* 7189c6fd2807SJeff Garzik * Dummy port_ops 7190c6fd2807SJeff Garzik */ 7191c6fd2807SJeff Garzik static void ata_dummy_noret(struct ata_port *ap) { } 7192c6fd2807SJeff Garzik static int ata_dummy_ret0(struct ata_port *ap) { return 0; } 7193c6fd2807SJeff Garzik static void ata_dummy_qc_noret(struct ata_queued_cmd *qc) { } 7194c6fd2807SJeff Garzik 7195c6fd2807SJeff Garzik static u8 ata_dummy_check_status(struct ata_port *ap) 7196c6fd2807SJeff Garzik { 7197c6fd2807SJeff Garzik return ATA_DRDY; 7198c6fd2807SJeff Garzik } 7199c6fd2807SJeff Garzik 7200c6fd2807SJeff Garzik static unsigned int ata_dummy_qc_issue(struct ata_queued_cmd *qc) 7201c6fd2807SJeff Garzik { 7202c6fd2807SJeff Garzik return AC_ERR_SYSTEM; 7203c6fd2807SJeff Garzik } 7204c6fd2807SJeff Garzik 7205c6fd2807SJeff Garzik const struct ata_port_operations ata_dummy_port_ops = { 7206c6fd2807SJeff Garzik .check_status = ata_dummy_check_status, 7207c6fd2807SJeff Garzik .check_altstatus = ata_dummy_check_status, 7208c6fd2807SJeff Garzik .dev_select = ata_noop_dev_select, 7209c6fd2807SJeff Garzik .qc_prep = ata_noop_qc_prep, 7210c6fd2807SJeff Garzik .qc_issue = ata_dummy_qc_issue, 7211c6fd2807SJeff Garzik .freeze = ata_dummy_noret, 7212c6fd2807SJeff Garzik .thaw = ata_dummy_noret, 7213c6fd2807SJeff Garzik .error_handler = ata_dummy_noret, 7214c6fd2807SJeff Garzik .post_internal_cmd = ata_dummy_qc_noret, 7215c6fd2807SJeff Garzik .irq_clear = ata_dummy_noret, 7216c6fd2807SJeff Garzik .port_start = ata_dummy_ret0, 7217c6fd2807SJeff Garzik .port_stop = ata_dummy_noret, 7218c6fd2807SJeff Garzik }; 7219c6fd2807SJeff Garzik 722021b0ad4fSTejun Heo const struct ata_port_info ata_dummy_port_info = { 722121b0ad4fSTejun Heo .port_ops = &ata_dummy_port_ops, 722221b0ad4fSTejun Heo }; 722321b0ad4fSTejun Heo 7224c6fd2807SJeff Garzik /* 7225c6fd2807SJeff Garzik * libata is essentially a library of internal helper functions for 7226c6fd2807SJeff Garzik * low-level ATA host controller drivers. As such, the API/ABI is 7227c6fd2807SJeff Garzik * likely to change as new drivers are added and updated. 7228c6fd2807SJeff Garzik * Do not depend on ABI/API stability. 7229c6fd2807SJeff Garzik */ 7230c6fd2807SJeff Garzik 7231c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(sata_deb_timing_normal); 7232c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(sata_deb_timing_hotplug); 7233c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(sata_deb_timing_long); 7234c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_dummy_port_ops); 723521b0ad4fSTejun Heo EXPORT_SYMBOL_GPL(ata_dummy_port_info); 7236c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_std_bios_param); 7237c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_std_ports); 7238cca3974eSJeff Garzik EXPORT_SYMBOL_GPL(ata_host_init); 7239f3187195STejun Heo EXPORT_SYMBOL_GPL(ata_host_alloc); 7240f5cda257STejun Heo EXPORT_SYMBOL_GPL(ata_host_alloc_pinfo); 7241ecef7253STejun Heo EXPORT_SYMBOL_GPL(ata_host_start); 7242f3187195STejun Heo EXPORT_SYMBOL_GPL(ata_host_register); 7243f5cda257STejun Heo EXPORT_SYMBOL_GPL(ata_host_activate); 72440529c159STejun Heo EXPORT_SYMBOL_GPL(ata_host_detach); 7245c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_sg_init); 7246c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_sg_init_one); 7247c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_hsm_move); 7248c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_qc_complete); 7249c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_qc_complete_multiple); 7250c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_qc_issue_prot); 7251c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_tf_load); 7252c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_tf_read); 7253c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_noop_dev_select); 7254c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_std_dev_select); 725543727fbcSJeff Garzik EXPORT_SYMBOL_GPL(sata_print_link_status); 7256c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_tf_to_fis); 7257c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_tf_from_fis); 7258c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_check_status); 7259c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_altstatus); 7260c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_exec_command); 7261c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_port_start); 7262d92e74d3SAlan Cox EXPORT_SYMBOL_GPL(ata_sff_port_start); 7263c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_interrupt); 726404351821SAlan EXPORT_SYMBOL_GPL(ata_do_set_mode); 72650d5ff566STejun Heo EXPORT_SYMBOL_GPL(ata_data_xfer); 72660d5ff566STejun Heo EXPORT_SYMBOL_GPL(ata_data_xfer_noirq); 726731cc23b3STejun Heo EXPORT_SYMBOL_GPL(ata_std_qc_defer); 7268c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_qc_prep); 7269d26fc955SAlan Cox EXPORT_SYMBOL_GPL(ata_dumb_qc_prep); 7270c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_noop_qc_prep); 7271c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_bmdma_setup); 7272c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_bmdma_start); 7273c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_bmdma_irq_clear); 7274c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_bmdma_status); 7275c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_bmdma_stop); 7276c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_bmdma_freeze); 7277c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_bmdma_thaw); 7278c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_bmdma_drive_eh); 7279c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_bmdma_error_handler); 7280c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_bmdma_post_internal_cmd); 7281c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_port_probe); 728210305f0fSAlan EXPORT_SYMBOL_GPL(ata_dev_disable); 7283c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(sata_set_spd); 7284936fd732STejun Heo EXPORT_SYMBOL_GPL(sata_link_debounce); 7285936fd732STejun Heo EXPORT_SYMBOL_GPL(sata_link_resume); 7286c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(sata_phy_reset); 7287c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(__sata_phy_reset); 7288c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_bus_reset); 7289c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_std_prereset); 7290c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_std_softreset); 7291cc0680a5STejun Heo EXPORT_SYMBOL_GPL(sata_link_hardreset); 7292c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(sata_std_hardreset); 7293c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_std_postreset); 7294c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_dev_classify); 7295c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_dev_pair); 7296c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_port_disable); 7297c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_ratelimit); 7298c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_wait_register); 7299c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_busy_sleep); 7300d4b2bab4STejun Heo EXPORT_SYMBOL_GPL(ata_wait_ready); 7301c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_port_queue_task); 7302c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_scsi_ioctl); 7303c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_scsi_queuecmd); 7304c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_scsi_slave_config); 7305c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_scsi_slave_destroy); 7306c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_scsi_change_queue_depth); 7307c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_host_intr); 7308c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(sata_scr_valid); 7309c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(sata_scr_read); 7310c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(sata_scr_write); 7311c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(sata_scr_write_flush); 7312936fd732STejun Heo EXPORT_SYMBOL_GPL(ata_link_online); 7313936fd732STejun Heo EXPORT_SYMBOL_GPL(ata_link_offline); 73146ffa01d8STejun Heo #ifdef CONFIG_PM 7315cca3974eSJeff Garzik EXPORT_SYMBOL_GPL(ata_host_suspend); 7316cca3974eSJeff Garzik EXPORT_SYMBOL_GPL(ata_host_resume); 73176ffa01d8STejun Heo #endif /* CONFIG_PM */ 7318c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_id_string); 7319c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_id_c_string); 732010305f0fSAlan EXPORT_SYMBOL_GPL(ata_id_to_dma_mode); 7321c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_scsi_simulate); 7322c6fd2807SJeff Garzik 7323c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_pio_need_iordy); 7324c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_timing_compute); 7325c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_timing_merge); 7326c6fd2807SJeff Garzik 7327c6fd2807SJeff Garzik #ifdef CONFIG_PCI 7328c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(pci_test_config_bits); 7329d583bc18STejun Heo EXPORT_SYMBOL_GPL(ata_pci_init_sff_host); 73301626aeb8STejun Heo EXPORT_SYMBOL_GPL(ata_pci_init_bmdma); 7331d583bc18STejun Heo EXPORT_SYMBOL_GPL(ata_pci_prepare_sff_host); 7332c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_pci_init_one); 7333c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_pci_remove_one); 73346ffa01d8STejun Heo #ifdef CONFIG_PM 7335c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_pci_device_do_suspend); 7336c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_pci_device_do_resume); 7337c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_pci_device_suspend); 7338c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_pci_device_resume); 73396ffa01d8STejun Heo #endif /* CONFIG_PM */ 7340c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_pci_default_filter); 7341c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_pci_clear_simplex); 7342c6fd2807SJeff Garzik #endif /* CONFIG_PCI */ 7343c6fd2807SJeff Garzik 734431f88384STejun Heo EXPORT_SYMBOL_GPL(sata_pmp_qc_defer_cmd_switch); 73453af9a77aSTejun Heo EXPORT_SYMBOL_GPL(sata_pmp_read_init_tf); 73463af9a77aSTejun Heo EXPORT_SYMBOL_GPL(sata_pmp_read_val); 73473af9a77aSTejun Heo EXPORT_SYMBOL_GPL(sata_pmp_write_init_tf); 73483af9a77aSTejun Heo EXPORT_SYMBOL_GPL(sata_pmp_std_prereset); 73493af9a77aSTejun Heo EXPORT_SYMBOL_GPL(sata_pmp_std_hardreset); 73503af9a77aSTejun Heo EXPORT_SYMBOL_GPL(sata_pmp_std_postreset); 73513af9a77aSTejun Heo EXPORT_SYMBOL_GPL(sata_pmp_do_eh); 73523af9a77aSTejun Heo 7353b64bbc39STejun Heo EXPORT_SYMBOL_GPL(__ata_ehi_push_desc); 7354b64bbc39STejun Heo EXPORT_SYMBOL_GPL(ata_ehi_push_desc); 7355b64bbc39STejun Heo EXPORT_SYMBOL_GPL(ata_ehi_clear_desc); 7356cbcdd875STejun Heo EXPORT_SYMBOL_GPL(ata_port_desc); 7357cbcdd875STejun Heo #ifdef CONFIG_PCI 7358cbcdd875STejun Heo EXPORT_SYMBOL_GPL(ata_port_pbar_desc); 7359cbcdd875STejun Heo #endif /* CONFIG_PCI */ 7360c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_eng_timeout); 7361c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_port_schedule_eh); 7362dbd82616STejun Heo EXPORT_SYMBOL_GPL(ata_link_abort); 7363c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_port_abort); 7364c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_port_freeze); 73657d77b247STejun Heo EXPORT_SYMBOL_GPL(sata_async_notification); 7366c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_eh_freeze_port); 7367c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_eh_thaw_port); 7368c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_eh_qc_complete); 7369c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_eh_qc_retry); 7370c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_do_eh); 737183625006SAkira Iguchi EXPORT_SYMBOL_GPL(ata_irq_on); 7372a619f981SAkira Iguchi EXPORT_SYMBOL_GPL(ata_dev_try_classify); 7373be0d18dfSAlan Cox 7374be0d18dfSAlan Cox EXPORT_SYMBOL_GPL(ata_cable_40wire); 7375be0d18dfSAlan Cox EXPORT_SYMBOL_GPL(ata_cable_80wire); 7376be0d18dfSAlan Cox EXPORT_SYMBOL_GPL(ata_cable_unknown); 7377be0d18dfSAlan Cox EXPORT_SYMBOL_GPL(ata_cable_sata); 7378