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 628bc3fc47SJeff Garzik #define DRV_VERSION "2.21" /* must be exactly four chars */ 63fda0efc5SJeff Garzik 64fda0efc5SJeff Garzik 65c6fd2807SJeff Garzik /* debounce timing parameters in msecs { interval, duration, timeout } */ 66c6fd2807SJeff Garzik const unsigned long sata_deb_timing_normal[] = { 5, 100, 2000 }; 67c6fd2807SJeff Garzik const unsigned long sata_deb_timing_hotplug[] = { 25, 500, 2000 }; 68c6fd2807SJeff Garzik const unsigned long sata_deb_timing_long[] = { 100, 2000, 5000 }; 69c6fd2807SJeff Garzik 70c6fd2807SJeff Garzik static unsigned int ata_dev_init_params(struct ata_device *dev, 71c6fd2807SJeff Garzik u16 heads, u16 sectors); 72c6fd2807SJeff Garzik static unsigned int ata_dev_set_xfermode(struct ata_device *dev); 73c6fd2807SJeff Garzik static void ata_dev_xfermask(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 88c6fd2807SJeff Garzik int libata_fua = 0; 89c6fd2807SJeff Garzik module_param_named(fua, libata_fua, int, 0444); 90c6fd2807SJeff Garzik MODULE_PARM_DESC(fua, "FUA support (0=off, 1=on)"); 91c6fd2807SJeff Garzik 921e999736SAlan Cox static int ata_ignore_hpa = 0; 931e999736SAlan Cox module_param_named(ignore_hpa, ata_ignore_hpa, int, 0644); 941e999736SAlan Cox MODULE_PARM_DESC(ignore_hpa, "Ignore HPA limit (0=keep BIOS limits, 1=ignore limits, using full disk)"); 951e999736SAlan Cox 96c6fd2807SJeff Garzik static int ata_probe_timeout = ATA_TMOUT_INTERNAL / HZ; 97c6fd2807SJeff Garzik module_param(ata_probe_timeout, int, 0444); 98c6fd2807SJeff Garzik MODULE_PARM_DESC(ata_probe_timeout, "Set ATA probing timeout (seconds)"); 99c6fd2807SJeff Garzik 100d7d0dad6SJeff Garzik int libata_noacpi = 1; 101d7d0dad6SJeff Garzik module_param_named(noacpi, libata_noacpi, int, 0444); 10211ef697bSKristen Carlson Accardi MODULE_PARM_DESC(noacpi, "Disables the use of ACPI in suspend/resume when set"); 10311ef697bSKristen Carlson Accardi 104c6fd2807SJeff Garzik MODULE_AUTHOR("Jeff Garzik"); 105c6fd2807SJeff Garzik MODULE_DESCRIPTION("Library module for ATA devices"); 106c6fd2807SJeff Garzik MODULE_LICENSE("GPL"); 107c6fd2807SJeff Garzik MODULE_VERSION(DRV_VERSION); 108c6fd2807SJeff Garzik 109c6fd2807SJeff Garzik 110c6fd2807SJeff Garzik /** 111c6fd2807SJeff Garzik * ata_tf_to_fis - Convert ATA taskfile to SATA FIS structure 112c6fd2807SJeff Garzik * @tf: Taskfile to convert 113c6fd2807SJeff Garzik * @fis: Buffer into which data will output 114c6fd2807SJeff Garzik * @pmp: Port multiplier port 115c6fd2807SJeff Garzik * 116c6fd2807SJeff Garzik * Converts a standard ATA taskfile to a Serial ATA 117c6fd2807SJeff Garzik * FIS structure (Register - Host to Device). 118c6fd2807SJeff Garzik * 119c6fd2807SJeff Garzik * LOCKING: 120c6fd2807SJeff Garzik * Inherited from caller. 121c6fd2807SJeff Garzik */ 122c6fd2807SJeff Garzik 123c6fd2807SJeff Garzik void ata_tf_to_fis(const struct ata_taskfile *tf, u8 *fis, u8 pmp) 124c6fd2807SJeff Garzik { 125c6fd2807SJeff Garzik fis[0] = 0x27; /* Register - Host to Device FIS */ 126c6fd2807SJeff Garzik fis[1] = (pmp & 0xf) | (1 << 7); /* Port multiplier number, 127c6fd2807SJeff Garzik bit 7 indicates Command FIS */ 128c6fd2807SJeff Garzik fis[2] = tf->command; 129c6fd2807SJeff Garzik fis[3] = tf->feature; 130c6fd2807SJeff Garzik 131c6fd2807SJeff Garzik fis[4] = tf->lbal; 132c6fd2807SJeff Garzik fis[5] = tf->lbam; 133c6fd2807SJeff Garzik fis[6] = tf->lbah; 134c6fd2807SJeff Garzik fis[7] = tf->device; 135c6fd2807SJeff Garzik 136c6fd2807SJeff Garzik fis[8] = tf->hob_lbal; 137c6fd2807SJeff Garzik fis[9] = tf->hob_lbam; 138c6fd2807SJeff Garzik fis[10] = tf->hob_lbah; 139c6fd2807SJeff Garzik fis[11] = tf->hob_feature; 140c6fd2807SJeff Garzik 141c6fd2807SJeff Garzik fis[12] = tf->nsect; 142c6fd2807SJeff Garzik fis[13] = tf->hob_nsect; 143c6fd2807SJeff Garzik fis[14] = 0; 144c6fd2807SJeff Garzik fis[15] = tf->ctl; 145c6fd2807SJeff Garzik 146c6fd2807SJeff Garzik fis[16] = 0; 147c6fd2807SJeff Garzik fis[17] = 0; 148c6fd2807SJeff Garzik fis[18] = 0; 149c6fd2807SJeff Garzik fis[19] = 0; 150c6fd2807SJeff Garzik } 151c6fd2807SJeff Garzik 152c6fd2807SJeff Garzik /** 153c6fd2807SJeff Garzik * ata_tf_from_fis - Convert SATA FIS to ATA taskfile 154c6fd2807SJeff Garzik * @fis: Buffer from which data will be input 155c6fd2807SJeff Garzik * @tf: Taskfile to output 156c6fd2807SJeff Garzik * 157c6fd2807SJeff Garzik * Converts a serial ATA FIS structure to a standard ATA taskfile. 158c6fd2807SJeff Garzik * 159c6fd2807SJeff Garzik * LOCKING: 160c6fd2807SJeff Garzik * Inherited from caller. 161c6fd2807SJeff Garzik */ 162c6fd2807SJeff Garzik 163c6fd2807SJeff Garzik void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf) 164c6fd2807SJeff Garzik { 165c6fd2807SJeff Garzik tf->command = fis[2]; /* status */ 166c6fd2807SJeff Garzik tf->feature = fis[3]; /* error */ 167c6fd2807SJeff Garzik 168c6fd2807SJeff Garzik tf->lbal = fis[4]; 169c6fd2807SJeff Garzik tf->lbam = fis[5]; 170c6fd2807SJeff Garzik tf->lbah = fis[6]; 171c6fd2807SJeff Garzik tf->device = fis[7]; 172c6fd2807SJeff Garzik 173c6fd2807SJeff Garzik tf->hob_lbal = fis[8]; 174c6fd2807SJeff Garzik tf->hob_lbam = fis[9]; 175c6fd2807SJeff Garzik tf->hob_lbah = fis[10]; 176c6fd2807SJeff Garzik 177c6fd2807SJeff Garzik tf->nsect = fis[12]; 178c6fd2807SJeff Garzik tf->hob_nsect = fis[13]; 179c6fd2807SJeff Garzik } 180c6fd2807SJeff Garzik 181c6fd2807SJeff Garzik static const u8 ata_rw_cmds[] = { 182c6fd2807SJeff Garzik /* pio multi */ 183c6fd2807SJeff Garzik ATA_CMD_READ_MULTI, 184c6fd2807SJeff Garzik ATA_CMD_WRITE_MULTI, 185c6fd2807SJeff Garzik ATA_CMD_READ_MULTI_EXT, 186c6fd2807SJeff Garzik ATA_CMD_WRITE_MULTI_EXT, 187c6fd2807SJeff Garzik 0, 188c6fd2807SJeff Garzik 0, 189c6fd2807SJeff Garzik 0, 190c6fd2807SJeff Garzik ATA_CMD_WRITE_MULTI_FUA_EXT, 191c6fd2807SJeff Garzik /* pio */ 192c6fd2807SJeff Garzik ATA_CMD_PIO_READ, 193c6fd2807SJeff Garzik ATA_CMD_PIO_WRITE, 194c6fd2807SJeff Garzik ATA_CMD_PIO_READ_EXT, 195c6fd2807SJeff Garzik ATA_CMD_PIO_WRITE_EXT, 196c6fd2807SJeff Garzik 0, 197c6fd2807SJeff Garzik 0, 198c6fd2807SJeff Garzik 0, 199c6fd2807SJeff Garzik 0, 200c6fd2807SJeff Garzik /* dma */ 201c6fd2807SJeff Garzik ATA_CMD_READ, 202c6fd2807SJeff Garzik ATA_CMD_WRITE, 203c6fd2807SJeff Garzik ATA_CMD_READ_EXT, 204c6fd2807SJeff Garzik ATA_CMD_WRITE_EXT, 205c6fd2807SJeff Garzik 0, 206c6fd2807SJeff Garzik 0, 207c6fd2807SJeff Garzik 0, 208c6fd2807SJeff Garzik ATA_CMD_WRITE_FUA_EXT 209c6fd2807SJeff Garzik }; 210c6fd2807SJeff Garzik 211c6fd2807SJeff Garzik /** 212c6fd2807SJeff Garzik * ata_rwcmd_protocol - set taskfile r/w commands and protocol 213bd056d7eSTejun Heo * @tf: command to examine and configure 214bd056d7eSTejun Heo * @dev: device tf belongs to 215c6fd2807SJeff Garzik * 216c6fd2807SJeff Garzik * Examine the device configuration and tf->flags to calculate 217c6fd2807SJeff Garzik * the proper read/write commands and protocol to use. 218c6fd2807SJeff Garzik * 219c6fd2807SJeff Garzik * LOCKING: 220c6fd2807SJeff Garzik * caller. 221c6fd2807SJeff Garzik */ 222bd056d7eSTejun Heo static int ata_rwcmd_protocol(struct ata_taskfile *tf, struct ata_device *dev) 223c6fd2807SJeff Garzik { 224c6fd2807SJeff Garzik u8 cmd; 225c6fd2807SJeff Garzik 226c6fd2807SJeff Garzik int index, fua, lba48, write; 227c6fd2807SJeff Garzik 228c6fd2807SJeff Garzik fua = (tf->flags & ATA_TFLAG_FUA) ? 4 : 0; 229c6fd2807SJeff Garzik lba48 = (tf->flags & ATA_TFLAG_LBA48) ? 2 : 0; 230c6fd2807SJeff Garzik write = (tf->flags & ATA_TFLAG_WRITE) ? 1 : 0; 231c6fd2807SJeff Garzik 232c6fd2807SJeff Garzik if (dev->flags & ATA_DFLAG_PIO) { 233c6fd2807SJeff Garzik tf->protocol = ATA_PROT_PIO; 234c6fd2807SJeff Garzik index = dev->multi_count ? 0 : 8; 235bd056d7eSTejun Heo } else if (lba48 && (dev->ap->flags & ATA_FLAG_PIO_LBA48)) { 236c6fd2807SJeff Garzik /* Unable to use DMA due to host limitation */ 237c6fd2807SJeff Garzik tf->protocol = ATA_PROT_PIO; 238c6fd2807SJeff Garzik index = dev->multi_count ? 0 : 8; 239c6fd2807SJeff Garzik } else { 240c6fd2807SJeff Garzik tf->protocol = ATA_PROT_DMA; 241c6fd2807SJeff Garzik index = 16; 242c6fd2807SJeff Garzik } 243c6fd2807SJeff Garzik 244c6fd2807SJeff Garzik cmd = ata_rw_cmds[index + fua + lba48 + write]; 245c6fd2807SJeff Garzik if (cmd) { 246c6fd2807SJeff Garzik tf->command = cmd; 247c6fd2807SJeff Garzik return 0; 248c6fd2807SJeff Garzik } 249c6fd2807SJeff Garzik return -1; 250c6fd2807SJeff Garzik } 251c6fd2807SJeff Garzik 252c6fd2807SJeff Garzik /** 25335b649feSTejun Heo * ata_tf_read_block - Read block address from ATA taskfile 25435b649feSTejun Heo * @tf: ATA taskfile of interest 25535b649feSTejun Heo * @dev: ATA device @tf belongs to 25635b649feSTejun Heo * 25735b649feSTejun Heo * LOCKING: 25835b649feSTejun Heo * None. 25935b649feSTejun Heo * 26035b649feSTejun Heo * Read block address from @tf. This function can handle all 26135b649feSTejun Heo * three address formats - LBA, LBA48 and CHS. tf->protocol and 26235b649feSTejun Heo * flags select the address format to use. 26335b649feSTejun Heo * 26435b649feSTejun Heo * RETURNS: 26535b649feSTejun Heo * Block address read from @tf. 26635b649feSTejun Heo */ 26735b649feSTejun Heo u64 ata_tf_read_block(struct ata_taskfile *tf, struct ata_device *dev) 26835b649feSTejun Heo { 26935b649feSTejun Heo u64 block = 0; 27035b649feSTejun Heo 27135b649feSTejun Heo if (tf->flags & ATA_TFLAG_LBA) { 27235b649feSTejun Heo if (tf->flags & ATA_TFLAG_LBA48) { 27335b649feSTejun Heo block |= (u64)tf->hob_lbah << 40; 27435b649feSTejun Heo block |= (u64)tf->hob_lbam << 32; 27535b649feSTejun Heo block |= tf->hob_lbal << 24; 27635b649feSTejun Heo } else 27735b649feSTejun Heo block |= (tf->device & 0xf) << 24; 27835b649feSTejun Heo 27935b649feSTejun Heo block |= tf->lbah << 16; 28035b649feSTejun Heo block |= tf->lbam << 8; 28135b649feSTejun Heo block |= tf->lbal; 28235b649feSTejun Heo } else { 28335b649feSTejun Heo u32 cyl, head, sect; 28435b649feSTejun Heo 28535b649feSTejun Heo cyl = tf->lbam | (tf->lbah << 8); 28635b649feSTejun Heo head = tf->device & 0xf; 28735b649feSTejun Heo sect = tf->lbal; 28835b649feSTejun Heo 28935b649feSTejun Heo block = (cyl * dev->heads + head) * dev->sectors + sect; 29035b649feSTejun Heo } 29135b649feSTejun Heo 29235b649feSTejun Heo return block; 29335b649feSTejun Heo } 29435b649feSTejun Heo 29535b649feSTejun Heo /** 296bd056d7eSTejun Heo * ata_build_rw_tf - Build ATA taskfile for given read/write request 297bd056d7eSTejun Heo * @tf: Target ATA taskfile 298bd056d7eSTejun Heo * @dev: ATA device @tf belongs to 299bd056d7eSTejun Heo * @block: Block address 300bd056d7eSTejun Heo * @n_block: Number of blocks 301bd056d7eSTejun Heo * @tf_flags: RW/FUA etc... 302bd056d7eSTejun Heo * @tag: tag 303bd056d7eSTejun Heo * 304bd056d7eSTejun Heo * LOCKING: 305bd056d7eSTejun Heo * None. 306bd056d7eSTejun Heo * 307bd056d7eSTejun Heo * Build ATA taskfile @tf for read/write request described by 308bd056d7eSTejun Heo * @block, @n_block, @tf_flags and @tag on @dev. 309bd056d7eSTejun Heo * 310bd056d7eSTejun Heo * RETURNS: 311bd056d7eSTejun Heo * 312bd056d7eSTejun Heo * 0 on success, -ERANGE if the request is too large for @dev, 313bd056d7eSTejun Heo * -EINVAL if the request is invalid. 314bd056d7eSTejun Heo */ 315bd056d7eSTejun Heo int ata_build_rw_tf(struct ata_taskfile *tf, struct ata_device *dev, 316bd056d7eSTejun Heo u64 block, u32 n_block, unsigned int tf_flags, 317bd056d7eSTejun Heo unsigned int tag) 318bd056d7eSTejun Heo { 319bd056d7eSTejun Heo tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 320bd056d7eSTejun Heo tf->flags |= tf_flags; 321bd056d7eSTejun Heo 3226d1245bfSTejun Heo if (ata_ncq_enabled(dev) && likely(tag != ATA_TAG_INTERNAL)) { 323bd056d7eSTejun Heo /* yay, NCQ */ 324bd056d7eSTejun Heo if (!lba_48_ok(block, n_block)) 325bd056d7eSTejun Heo return -ERANGE; 326bd056d7eSTejun Heo 327bd056d7eSTejun Heo tf->protocol = ATA_PROT_NCQ; 328bd056d7eSTejun Heo tf->flags |= ATA_TFLAG_LBA | ATA_TFLAG_LBA48; 329bd056d7eSTejun Heo 330bd056d7eSTejun Heo if (tf->flags & ATA_TFLAG_WRITE) 331bd056d7eSTejun Heo tf->command = ATA_CMD_FPDMA_WRITE; 332bd056d7eSTejun Heo else 333bd056d7eSTejun Heo tf->command = ATA_CMD_FPDMA_READ; 334bd056d7eSTejun Heo 335bd056d7eSTejun Heo tf->nsect = tag << 3; 336bd056d7eSTejun Heo tf->hob_feature = (n_block >> 8) & 0xff; 337bd056d7eSTejun Heo tf->feature = n_block & 0xff; 338bd056d7eSTejun Heo 339bd056d7eSTejun Heo tf->hob_lbah = (block >> 40) & 0xff; 340bd056d7eSTejun Heo tf->hob_lbam = (block >> 32) & 0xff; 341bd056d7eSTejun Heo tf->hob_lbal = (block >> 24) & 0xff; 342bd056d7eSTejun Heo tf->lbah = (block >> 16) & 0xff; 343bd056d7eSTejun Heo tf->lbam = (block >> 8) & 0xff; 344bd056d7eSTejun Heo tf->lbal = block & 0xff; 345bd056d7eSTejun Heo 346bd056d7eSTejun Heo tf->device = 1 << 6; 347bd056d7eSTejun Heo if (tf->flags & ATA_TFLAG_FUA) 348bd056d7eSTejun Heo tf->device |= 1 << 7; 349bd056d7eSTejun Heo } else if (dev->flags & ATA_DFLAG_LBA) { 350bd056d7eSTejun Heo tf->flags |= ATA_TFLAG_LBA; 351bd056d7eSTejun Heo 352bd056d7eSTejun Heo if (lba_28_ok(block, n_block)) { 353bd056d7eSTejun Heo /* use LBA28 */ 354bd056d7eSTejun Heo tf->device |= (block >> 24) & 0xf; 355bd056d7eSTejun Heo } else if (lba_48_ok(block, n_block)) { 356bd056d7eSTejun Heo if (!(dev->flags & ATA_DFLAG_LBA48)) 357bd056d7eSTejun Heo return -ERANGE; 358bd056d7eSTejun Heo 359bd056d7eSTejun Heo /* use LBA48 */ 360bd056d7eSTejun Heo tf->flags |= ATA_TFLAG_LBA48; 361bd056d7eSTejun Heo 362bd056d7eSTejun Heo tf->hob_nsect = (n_block >> 8) & 0xff; 363bd056d7eSTejun Heo 364bd056d7eSTejun Heo tf->hob_lbah = (block >> 40) & 0xff; 365bd056d7eSTejun Heo tf->hob_lbam = (block >> 32) & 0xff; 366bd056d7eSTejun Heo tf->hob_lbal = (block >> 24) & 0xff; 367bd056d7eSTejun Heo } else 368bd056d7eSTejun Heo /* request too large even for LBA48 */ 369bd056d7eSTejun Heo return -ERANGE; 370bd056d7eSTejun Heo 371bd056d7eSTejun Heo if (unlikely(ata_rwcmd_protocol(tf, dev) < 0)) 372bd056d7eSTejun Heo return -EINVAL; 373bd056d7eSTejun Heo 374bd056d7eSTejun Heo tf->nsect = n_block & 0xff; 375bd056d7eSTejun Heo 376bd056d7eSTejun Heo tf->lbah = (block >> 16) & 0xff; 377bd056d7eSTejun Heo tf->lbam = (block >> 8) & 0xff; 378bd056d7eSTejun Heo tf->lbal = block & 0xff; 379bd056d7eSTejun Heo 380bd056d7eSTejun Heo tf->device |= ATA_LBA; 381bd056d7eSTejun Heo } else { 382bd056d7eSTejun Heo /* CHS */ 383bd056d7eSTejun Heo u32 sect, head, cyl, track; 384bd056d7eSTejun Heo 385bd056d7eSTejun Heo /* The request -may- be too large for CHS addressing. */ 386bd056d7eSTejun Heo if (!lba_28_ok(block, n_block)) 387bd056d7eSTejun Heo return -ERANGE; 388bd056d7eSTejun Heo 389bd056d7eSTejun Heo if (unlikely(ata_rwcmd_protocol(tf, dev) < 0)) 390bd056d7eSTejun Heo return -EINVAL; 391bd056d7eSTejun Heo 392bd056d7eSTejun Heo /* Convert LBA to CHS */ 393bd056d7eSTejun Heo track = (u32)block / dev->sectors; 394bd056d7eSTejun Heo cyl = track / dev->heads; 395bd056d7eSTejun Heo head = track % dev->heads; 396bd056d7eSTejun Heo sect = (u32)block % dev->sectors + 1; 397bd056d7eSTejun Heo 398bd056d7eSTejun Heo DPRINTK("block %u track %u cyl %u head %u sect %u\n", 399bd056d7eSTejun Heo (u32)block, track, cyl, head, sect); 400bd056d7eSTejun Heo 401bd056d7eSTejun Heo /* Check whether the converted CHS can fit. 402bd056d7eSTejun Heo Cylinder: 0-65535 403bd056d7eSTejun Heo Head: 0-15 404bd056d7eSTejun Heo Sector: 1-255*/ 405bd056d7eSTejun Heo if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect)) 406bd056d7eSTejun Heo return -ERANGE; 407bd056d7eSTejun Heo 408bd056d7eSTejun Heo tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */ 409bd056d7eSTejun Heo tf->lbal = sect; 410bd056d7eSTejun Heo tf->lbam = cyl; 411bd056d7eSTejun Heo tf->lbah = cyl >> 8; 412bd056d7eSTejun Heo tf->device |= head; 413bd056d7eSTejun Heo } 414bd056d7eSTejun Heo 415bd056d7eSTejun Heo return 0; 416bd056d7eSTejun Heo } 417bd056d7eSTejun Heo 418bd056d7eSTejun Heo /** 419c6fd2807SJeff Garzik * ata_pack_xfermask - Pack pio, mwdma and udma masks into xfer_mask 420c6fd2807SJeff Garzik * @pio_mask: pio_mask 421c6fd2807SJeff Garzik * @mwdma_mask: mwdma_mask 422c6fd2807SJeff Garzik * @udma_mask: udma_mask 423c6fd2807SJeff Garzik * 424c6fd2807SJeff Garzik * Pack @pio_mask, @mwdma_mask and @udma_mask into a single 425c6fd2807SJeff Garzik * unsigned int xfer_mask. 426c6fd2807SJeff Garzik * 427c6fd2807SJeff Garzik * LOCKING: 428c6fd2807SJeff Garzik * None. 429c6fd2807SJeff Garzik * 430c6fd2807SJeff Garzik * RETURNS: 431c6fd2807SJeff Garzik * Packed xfer_mask. 432c6fd2807SJeff Garzik */ 433c6fd2807SJeff Garzik static unsigned int ata_pack_xfermask(unsigned int pio_mask, 434c6fd2807SJeff Garzik unsigned int mwdma_mask, 435c6fd2807SJeff Garzik unsigned int udma_mask) 436c6fd2807SJeff Garzik { 437c6fd2807SJeff Garzik return ((pio_mask << ATA_SHIFT_PIO) & ATA_MASK_PIO) | 438c6fd2807SJeff Garzik ((mwdma_mask << ATA_SHIFT_MWDMA) & ATA_MASK_MWDMA) | 439c6fd2807SJeff Garzik ((udma_mask << ATA_SHIFT_UDMA) & ATA_MASK_UDMA); 440c6fd2807SJeff Garzik } 441c6fd2807SJeff Garzik 442c6fd2807SJeff Garzik /** 443c6fd2807SJeff Garzik * ata_unpack_xfermask - Unpack xfer_mask into pio, mwdma and udma masks 444c6fd2807SJeff Garzik * @xfer_mask: xfer_mask to unpack 445c6fd2807SJeff Garzik * @pio_mask: resulting pio_mask 446c6fd2807SJeff Garzik * @mwdma_mask: resulting mwdma_mask 447c6fd2807SJeff Garzik * @udma_mask: resulting udma_mask 448c6fd2807SJeff Garzik * 449c6fd2807SJeff Garzik * Unpack @xfer_mask into @pio_mask, @mwdma_mask and @udma_mask. 450c6fd2807SJeff Garzik * Any NULL distination masks will be ignored. 451c6fd2807SJeff Garzik */ 452c6fd2807SJeff Garzik static void ata_unpack_xfermask(unsigned int xfer_mask, 453c6fd2807SJeff Garzik unsigned int *pio_mask, 454c6fd2807SJeff Garzik unsigned int *mwdma_mask, 455c6fd2807SJeff Garzik unsigned int *udma_mask) 456c6fd2807SJeff Garzik { 457c6fd2807SJeff Garzik if (pio_mask) 458c6fd2807SJeff Garzik *pio_mask = (xfer_mask & ATA_MASK_PIO) >> ATA_SHIFT_PIO; 459c6fd2807SJeff Garzik if (mwdma_mask) 460c6fd2807SJeff Garzik *mwdma_mask = (xfer_mask & ATA_MASK_MWDMA) >> ATA_SHIFT_MWDMA; 461c6fd2807SJeff Garzik if (udma_mask) 462c6fd2807SJeff Garzik *udma_mask = (xfer_mask & ATA_MASK_UDMA) >> ATA_SHIFT_UDMA; 463c6fd2807SJeff Garzik } 464c6fd2807SJeff Garzik 465c6fd2807SJeff Garzik static const struct ata_xfer_ent { 466c6fd2807SJeff Garzik int shift, bits; 467c6fd2807SJeff Garzik u8 base; 468c6fd2807SJeff Garzik } ata_xfer_tbl[] = { 469c6fd2807SJeff Garzik { ATA_SHIFT_PIO, ATA_BITS_PIO, XFER_PIO_0 }, 470c6fd2807SJeff Garzik { ATA_SHIFT_MWDMA, ATA_BITS_MWDMA, XFER_MW_DMA_0 }, 471c6fd2807SJeff Garzik { ATA_SHIFT_UDMA, ATA_BITS_UDMA, XFER_UDMA_0 }, 472c6fd2807SJeff Garzik { -1, }, 473c6fd2807SJeff Garzik }; 474c6fd2807SJeff Garzik 475c6fd2807SJeff Garzik /** 476c6fd2807SJeff Garzik * ata_xfer_mask2mode - Find matching XFER_* for the given xfer_mask 477c6fd2807SJeff Garzik * @xfer_mask: xfer_mask of interest 478c6fd2807SJeff Garzik * 479c6fd2807SJeff Garzik * Return matching XFER_* value for @xfer_mask. Only the highest 480c6fd2807SJeff Garzik * bit of @xfer_mask is considered. 481c6fd2807SJeff Garzik * 482c6fd2807SJeff Garzik * LOCKING: 483c6fd2807SJeff Garzik * None. 484c6fd2807SJeff Garzik * 485c6fd2807SJeff Garzik * RETURNS: 486c6fd2807SJeff Garzik * Matching XFER_* value, 0 if no match found. 487c6fd2807SJeff Garzik */ 488c6fd2807SJeff Garzik static u8 ata_xfer_mask2mode(unsigned int xfer_mask) 489c6fd2807SJeff Garzik { 490c6fd2807SJeff Garzik int highbit = fls(xfer_mask) - 1; 491c6fd2807SJeff Garzik const struct ata_xfer_ent *ent; 492c6fd2807SJeff Garzik 493c6fd2807SJeff Garzik for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) 494c6fd2807SJeff Garzik if (highbit >= ent->shift && highbit < ent->shift + ent->bits) 495c6fd2807SJeff Garzik return ent->base + highbit - ent->shift; 496c6fd2807SJeff Garzik return 0; 497c6fd2807SJeff Garzik } 498c6fd2807SJeff Garzik 499c6fd2807SJeff Garzik /** 500c6fd2807SJeff Garzik * ata_xfer_mode2mask - Find matching xfer_mask for XFER_* 501c6fd2807SJeff Garzik * @xfer_mode: XFER_* of interest 502c6fd2807SJeff Garzik * 503c6fd2807SJeff Garzik * Return matching xfer_mask for @xfer_mode. 504c6fd2807SJeff Garzik * 505c6fd2807SJeff Garzik * LOCKING: 506c6fd2807SJeff Garzik * None. 507c6fd2807SJeff Garzik * 508c6fd2807SJeff Garzik * RETURNS: 509c6fd2807SJeff Garzik * Matching xfer_mask, 0 if no match found. 510c6fd2807SJeff Garzik */ 511c6fd2807SJeff Garzik static unsigned int ata_xfer_mode2mask(u8 xfer_mode) 512c6fd2807SJeff Garzik { 513c6fd2807SJeff Garzik const struct ata_xfer_ent *ent; 514c6fd2807SJeff Garzik 515c6fd2807SJeff Garzik for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) 516c6fd2807SJeff Garzik if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits) 517c6fd2807SJeff Garzik return 1 << (ent->shift + xfer_mode - ent->base); 518c6fd2807SJeff Garzik return 0; 519c6fd2807SJeff Garzik } 520c6fd2807SJeff Garzik 521c6fd2807SJeff Garzik /** 522c6fd2807SJeff Garzik * ata_xfer_mode2shift - Find matching xfer_shift for XFER_* 523c6fd2807SJeff Garzik * @xfer_mode: XFER_* of interest 524c6fd2807SJeff Garzik * 525c6fd2807SJeff Garzik * Return matching xfer_shift for @xfer_mode. 526c6fd2807SJeff Garzik * 527c6fd2807SJeff Garzik * LOCKING: 528c6fd2807SJeff Garzik * None. 529c6fd2807SJeff Garzik * 530c6fd2807SJeff Garzik * RETURNS: 531c6fd2807SJeff Garzik * Matching xfer_shift, -1 if no match found. 532c6fd2807SJeff Garzik */ 533c6fd2807SJeff Garzik static int ata_xfer_mode2shift(unsigned int xfer_mode) 534c6fd2807SJeff Garzik { 535c6fd2807SJeff Garzik const struct ata_xfer_ent *ent; 536c6fd2807SJeff Garzik 537c6fd2807SJeff Garzik for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) 538c6fd2807SJeff Garzik if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits) 539c6fd2807SJeff Garzik return ent->shift; 540c6fd2807SJeff Garzik return -1; 541c6fd2807SJeff Garzik } 542c6fd2807SJeff Garzik 543c6fd2807SJeff Garzik /** 544c6fd2807SJeff Garzik * ata_mode_string - convert xfer_mask to string 545c6fd2807SJeff Garzik * @xfer_mask: mask of bits supported; only highest bit counts. 546c6fd2807SJeff Garzik * 547c6fd2807SJeff Garzik * Determine string which represents the highest speed 548c6fd2807SJeff Garzik * (highest bit in @modemask). 549c6fd2807SJeff Garzik * 550c6fd2807SJeff Garzik * LOCKING: 551c6fd2807SJeff Garzik * None. 552c6fd2807SJeff Garzik * 553c6fd2807SJeff Garzik * RETURNS: 554c6fd2807SJeff Garzik * Constant C string representing highest speed listed in 555c6fd2807SJeff Garzik * @mode_mask, or the constant C string "<n/a>". 556c6fd2807SJeff Garzik */ 557c6fd2807SJeff Garzik static const char *ata_mode_string(unsigned int xfer_mask) 558c6fd2807SJeff Garzik { 559c6fd2807SJeff Garzik static const char * const xfer_mode_str[] = { 560c6fd2807SJeff Garzik "PIO0", 561c6fd2807SJeff Garzik "PIO1", 562c6fd2807SJeff Garzik "PIO2", 563c6fd2807SJeff Garzik "PIO3", 564c6fd2807SJeff Garzik "PIO4", 565b352e57dSAlan Cox "PIO5", 566b352e57dSAlan Cox "PIO6", 567c6fd2807SJeff Garzik "MWDMA0", 568c6fd2807SJeff Garzik "MWDMA1", 569c6fd2807SJeff Garzik "MWDMA2", 570b352e57dSAlan Cox "MWDMA3", 571b352e57dSAlan Cox "MWDMA4", 572c6fd2807SJeff Garzik "UDMA/16", 573c6fd2807SJeff Garzik "UDMA/25", 574c6fd2807SJeff Garzik "UDMA/33", 575c6fd2807SJeff Garzik "UDMA/44", 576c6fd2807SJeff Garzik "UDMA/66", 577c6fd2807SJeff Garzik "UDMA/100", 578c6fd2807SJeff Garzik "UDMA/133", 579c6fd2807SJeff Garzik "UDMA7", 580c6fd2807SJeff Garzik }; 581c6fd2807SJeff Garzik int highbit; 582c6fd2807SJeff Garzik 583c6fd2807SJeff Garzik highbit = fls(xfer_mask) - 1; 584c6fd2807SJeff Garzik if (highbit >= 0 && highbit < ARRAY_SIZE(xfer_mode_str)) 585c6fd2807SJeff Garzik return xfer_mode_str[highbit]; 586c6fd2807SJeff Garzik return "<n/a>"; 587c6fd2807SJeff Garzik } 588c6fd2807SJeff Garzik 589c6fd2807SJeff Garzik static const char *sata_spd_string(unsigned int spd) 590c6fd2807SJeff Garzik { 591c6fd2807SJeff Garzik static const char * const spd_str[] = { 592c6fd2807SJeff Garzik "1.5 Gbps", 593c6fd2807SJeff Garzik "3.0 Gbps", 594c6fd2807SJeff Garzik }; 595c6fd2807SJeff Garzik 596c6fd2807SJeff Garzik if (spd == 0 || (spd - 1) >= ARRAY_SIZE(spd_str)) 597c6fd2807SJeff Garzik return "<unknown>"; 598c6fd2807SJeff Garzik return spd_str[spd - 1]; 599c6fd2807SJeff Garzik } 600c6fd2807SJeff Garzik 601c6fd2807SJeff Garzik void ata_dev_disable(struct ata_device *dev) 602c6fd2807SJeff Garzik { 60309d7f9b0STejun Heo if (ata_dev_enabled(dev)) { 60409d7f9b0STejun Heo if (ata_msg_drv(dev->ap)) 605c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_WARNING, "disabled\n"); 6064ae72a1eSTejun Heo ata_down_xfermask_limit(dev, ATA_DNXFER_FORCE_PIO0 | 6074ae72a1eSTejun Heo ATA_DNXFER_QUIET); 608c6fd2807SJeff Garzik dev->class++; 609c6fd2807SJeff Garzik } 610c6fd2807SJeff Garzik } 611c6fd2807SJeff Garzik 612c6fd2807SJeff Garzik /** 613c6fd2807SJeff Garzik * ata_devchk - PATA device presence detection 614c6fd2807SJeff Garzik * @ap: ATA channel to examine 615c6fd2807SJeff Garzik * @device: Device to examine (starting at zero) 616c6fd2807SJeff Garzik * 6170d5ff566STejun Heo * This technique was originally described in 6180d5ff566STejun Heo * Hale Landis's ATADRVR (www.ata-atapi.com), and 6190d5ff566STejun Heo * later found its way into the ATA/ATAPI spec. 6200d5ff566STejun Heo * 6210d5ff566STejun Heo * Write a pattern to the ATA shadow registers, 6220d5ff566STejun Heo * and if a device is present, it will respond by 6230d5ff566STejun Heo * correctly storing and echoing back the 6240d5ff566STejun Heo * ATA shadow register contents. 625c6fd2807SJeff Garzik * 626c6fd2807SJeff Garzik * LOCKING: 627c6fd2807SJeff Garzik * caller. 628c6fd2807SJeff Garzik */ 629c6fd2807SJeff Garzik 6300d5ff566STejun Heo static unsigned int ata_devchk(struct ata_port *ap, unsigned int device) 631c6fd2807SJeff Garzik { 6320d5ff566STejun Heo struct ata_ioports *ioaddr = &ap->ioaddr; 6330d5ff566STejun Heo u8 nsect, lbal; 6340d5ff566STejun Heo 6350d5ff566STejun Heo ap->ops->dev_select(ap, device); 6360d5ff566STejun Heo 6370d5ff566STejun Heo iowrite8(0x55, ioaddr->nsect_addr); 6380d5ff566STejun Heo iowrite8(0xaa, ioaddr->lbal_addr); 6390d5ff566STejun Heo 6400d5ff566STejun Heo iowrite8(0xaa, ioaddr->nsect_addr); 6410d5ff566STejun Heo iowrite8(0x55, ioaddr->lbal_addr); 6420d5ff566STejun Heo 6430d5ff566STejun Heo iowrite8(0x55, ioaddr->nsect_addr); 6440d5ff566STejun Heo iowrite8(0xaa, ioaddr->lbal_addr); 6450d5ff566STejun Heo 6460d5ff566STejun Heo nsect = ioread8(ioaddr->nsect_addr); 6470d5ff566STejun Heo lbal = ioread8(ioaddr->lbal_addr); 6480d5ff566STejun Heo 6490d5ff566STejun Heo if ((nsect == 0x55) && (lbal == 0xaa)) 6500d5ff566STejun Heo return 1; /* we found a device */ 6510d5ff566STejun Heo 6520d5ff566STejun Heo return 0; /* nothing found */ 653c6fd2807SJeff Garzik } 654c6fd2807SJeff Garzik 655c6fd2807SJeff Garzik /** 656c6fd2807SJeff Garzik * ata_dev_classify - determine device type based on ATA-spec signature 657c6fd2807SJeff Garzik * @tf: ATA taskfile register set for device to be identified 658c6fd2807SJeff Garzik * 659c6fd2807SJeff Garzik * Determine from taskfile register contents whether a device is 660c6fd2807SJeff Garzik * ATA or ATAPI, as per "Signature and persistence" section 661c6fd2807SJeff Garzik * of ATA/PI spec (volume 1, sect 5.14). 662c6fd2807SJeff Garzik * 663c6fd2807SJeff Garzik * LOCKING: 664c6fd2807SJeff Garzik * None. 665c6fd2807SJeff Garzik * 666c6fd2807SJeff Garzik * RETURNS: 667c6fd2807SJeff Garzik * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, or %ATA_DEV_UNKNOWN 668c6fd2807SJeff Garzik * the event of failure. 669c6fd2807SJeff Garzik */ 670c6fd2807SJeff Garzik 671c6fd2807SJeff Garzik unsigned int ata_dev_classify(const struct ata_taskfile *tf) 672c6fd2807SJeff Garzik { 673c6fd2807SJeff Garzik /* Apple's open source Darwin code hints that some devices only 674c6fd2807SJeff Garzik * put a proper signature into the LBA mid/high registers, 675c6fd2807SJeff Garzik * So, we only check those. It's sufficient for uniqueness. 676c6fd2807SJeff Garzik */ 677c6fd2807SJeff Garzik 678c6fd2807SJeff Garzik if (((tf->lbam == 0) && (tf->lbah == 0)) || 679c6fd2807SJeff Garzik ((tf->lbam == 0x3c) && (tf->lbah == 0xc3))) { 680c6fd2807SJeff Garzik DPRINTK("found ATA device by sig\n"); 681c6fd2807SJeff Garzik return ATA_DEV_ATA; 682c6fd2807SJeff Garzik } 683c6fd2807SJeff Garzik 684c6fd2807SJeff Garzik if (((tf->lbam == 0x14) && (tf->lbah == 0xeb)) || 685c6fd2807SJeff Garzik ((tf->lbam == 0x69) && (tf->lbah == 0x96))) { 686c6fd2807SJeff Garzik DPRINTK("found ATAPI device by sig\n"); 687c6fd2807SJeff Garzik return ATA_DEV_ATAPI; 688c6fd2807SJeff Garzik } 689c6fd2807SJeff Garzik 690c6fd2807SJeff Garzik DPRINTK("unknown device\n"); 691c6fd2807SJeff Garzik return ATA_DEV_UNKNOWN; 692c6fd2807SJeff Garzik } 693c6fd2807SJeff Garzik 694c6fd2807SJeff Garzik /** 695c6fd2807SJeff Garzik * ata_dev_try_classify - Parse returned ATA device signature 696c6fd2807SJeff Garzik * @ap: ATA channel to examine 697c6fd2807SJeff Garzik * @device: Device to examine (starting at zero) 698c6fd2807SJeff Garzik * @r_err: Value of error register on completion 699c6fd2807SJeff Garzik * 700c6fd2807SJeff Garzik * After an event -- SRST, E.D.D., or SATA COMRESET -- occurs, 701c6fd2807SJeff Garzik * an ATA/ATAPI-defined set of values is placed in the ATA 702c6fd2807SJeff Garzik * shadow registers, indicating the results of device detection 703c6fd2807SJeff Garzik * and diagnostics. 704c6fd2807SJeff Garzik * 705c6fd2807SJeff Garzik * Select the ATA device, and read the values from the ATA shadow 706c6fd2807SJeff Garzik * registers. Then parse according to the Error register value, 707c6fd2807SJeff Garzik * and the spec-defined values examined by ata_dev_classify(). 708c6fd2807SJeff Garzik * 709c6fd2807SJeff Garzik * LOCKING: 710c6fd2807SJeff Garzik * caller. 711c6fd2807SJeff Garzik * 712c6fd2807SJeff Garzik * RETURNS: 713c6fd2807SJeff Garzik * Device type - %ATA_DEV_ATA, %ATA_DEV_ATAPI or %ATA_DEV_NONE. 714c6fd2807SJeff Garzik */ 715c6fd2807SJeff Garzik 716a619f981SAkira Iguchi unsigned int 717c6fd2807SJeff Garzik ata_dev_try_classify(struct ata_port *ap, unsigned int device, u8 *r_err) 718c6fd2807SJeff Garzik { 719c6fd2807SJeff Garzik struct ata_taskfile tf; 720c6fd2807SJeff Garzik unsigned int class; 721c6fd2807SJeff Garzik u8 err; 722c6fd2807SJeff Garzik 723c6fd2807SJeff Garzik ap->ops->dev_select(ap, device); 724c6fd2807SJeff Garzik 725c6fd2807SJeff Garzik memset(&tf, 0, sizeof(tf)); 726c6fd2807SJeff Garzik 727c6fd2807SJeff Garzik ap->ops->tf_read(ap, &tf); 728c6fd2807SJeff Garzik err = tf.feature; 729c6fd2807SJeff Garzik if (r_err) 730c6fd2807SJeff Garzik *r_err = err; 731c6fd2807SJeff Garzik 73293590859SAlan Cox /* see if device passed diags: if master then continue and warn later */ 73393590859SAlan Cox if (err == 0 && device == 0) 73493590859SAlan Cox /* diagnostic fail : do nothing _YET_ */ 73593590859SAlan Cox ap->device[device].horkage |= ATA_HORKAGE_DIAGNOSTIC; 73693590859SAlan Cox else if (err == 1) 737c6fd2807SJeff Garzik /* do nothing */ ; 738c6fd2807SJeff Garzik else if ((device == 0) && (err == 0x81)) 739c6fd2807SJeff Garzik /* do nothing */ ; 740c6fd2807SJeff Garzik else 741c6fd2807SJeff Garzik return ATA_DEV_NONE; 742c6fd2807SJeff Garzik 743c6fd2807SJeff Garzik /* determine if device is ATA or ATAPI */ 744c6fd2807SJeff Garzik class = ata_dev_classify(&tf); 745c6fd2807SJeff Garzik 746c6fd2807SJeff Garzik if (class == ATA_DEV_UNKNOWN) 747c6fd2807SJeff Garzik return ATA_DEV_NONE; 748c6fd2807SJeff Garzik if ((class == ATA_DEV_ATA) && (ata_chk_status(ap) == 0)) 749c6fd2807SJeff Garzik return ATA_DEV_NONE; 750c6fd2807SJeff Garzik return class; 751c6fd2807SJeff Garzik } 752c6fd2807SJeff Garzik 753c6fd2807SJeff Garzik /** 754c6fd2807SJeff Garzik * ata_id_string - Convert IDENTIFY DEVICE page into string 755c6fd2807SJeff Garzik * @id: IDENTIFY DEVICE results we will examine 756c6fd2807SJeff Garzik * @s: string into which data is output 757c6fd2807SJeff Garzik * @ofs: offset into identify device page 758c6fd2807SJeff Garzik * @len: length of string to return. must be an even number. 759c6fd2807SJeff Garzik * 760c6fd2807SJeff Garzik * The strings in the IDENTIFY DEVICE page are broken up into 761c6fd2807SJeff Garzik * 16-bit chunks. Run through the string, and output each 762c6fd2807SJeff Garzik * 8-bit chunk linearly, regardless of platform. 763c6fd2807SJeff Garzik * 764c6fd2807SJeff Garzik * LOCKING: 765c6fd2807SJeff Garzik * caller. 766c6fd2807SJeff Garzik */ 767c6fd2807SJeff Garzik 768c6fd2807SJeff Garzik void ata_id_string(const u16 *id, unsigned char *s, 769c6fd2807SJeff Garzik unsigned int ofs, unsigned int len) 770c6fd2807SJeff Garzik { 771c6fd2807SJeff Garzik unsigned int c; 772c6fd2807SJeff Garzik 773c6fd2807SJeff Garzik while (len > 0) { 774c6fd2807SJeff Garzik c = id[ofs] >> 8; 775c6fd2807SJeff Garzik *s = c; 776c6fd2807SJeff Garzik s++; 777c6fd2807SJeff Garzik 778c6fd2807SJeff Garzik c = id[ofs] & 0xff; 779c6fd2807SJeff Garzik *s = c; 780c6fd2807SJeff Garzik s++; 781c6fd2807SJeff Garzik 782c6fd2807SJeff Garzik ofs++; 783c6fd2807SJeff Garzik len -= 2; 784c6fd2807SJeff Garzik } 785c6fd2807SJeff Garzik } 786c6fd2807SJeff Garzik 787c6fd2807SJeff Garzik /** 788c6fd2807SJeff Garzik * ata_id_c_string - Convert IDENTIFY DEVICE page into C string 789c6fd2807SJeff Garzik * @id: IDENTIFY DEVICE results we will examine 790c6fd2807SJeff Garzik * @s: string into which data is output 791c6fd2807SJeff Garzik * @ofs: offset into identify device page 792c6fd2807SJeff Garzik * @len: length of string to return. must be an odd number. 793c6fd2807SJeff Garzik * 794c6fd2807SJeff Garzik * This function is identical to ata_id_string except that it 795c6fd2807SJeff Garzik * trims trailing spaces and terminates the resulting string with 796c6fd2807SJeff Garzik * null. @len must be actual maximum length (even number) + 1. 797c6fd2807SJeff Garzik * 798c6fd2807SJeff Garzik * LOCKING: 799c6fd2807SJeff Garzik * caller. 800c6fd2807SJeff Garzik */ 801c6fd2807SJeff Garzik void ata_id_c_string(const u16 *id, unsigned char *s, 802c6fd2807SJeff Garzik unsigned int ofs, unsigned int len) 803c6fd2807SJeff Garzik { 804c6fd2807SJeff Garzik unsigned char *p; 805c6fd2807SJeff Garzik 806c6fd2807SJeff Garzik WARN_ON(!(len & 1)); 807c6fd2807SJeff Garzik 808c6fd2807SJeff Garzik ata_id_string(id, s, ofs, len - 1); 809c6fd2807SJeff Garzik 810c6fd2807SJeff Garzik p = s + strnlen(s, len - 1); 811c6fd2807SJeff Garzik while (p > s && p[-1] == ' ') 812c6fd2807SJeff Garzik p--; 813c6fd2807SJeff Garzik *p = '\0'; 814c6fd2807SJeff Garzik } 815c6fd2807SJeff Garzik 8161e999736SAlan Cox static u64 ata_tf_to_lba48(struct ata_taskfile *tf) 8171e999736SAlan Cox { 8181e999736SAlan Cox u64 sectors = 0; 8191e999736SAlan Cox 8201e999736SAlan Cox sectors |= ((u64)(tf->hob_lbah & 0xff)) << 40; 8211e999736SAlan Cox sectors |= ((u64)(tf->hob_lbam & 0xff)) << 32; 8221e999736SAlan Cox sectors |= (tf->hob_lbal & 0xff) << 24; 8231e999736SAlan Cox sectors |= (tf->lbah & 0xff) << 16; 8241e999736SAlan Cox sectors |= (tf->lbam & 0xff) << 8; 8251e999736SAlan Cox sectors |= (tf->lbal & 0xff); 8261e999736SAlan Cox 8271e999736SAlan Cox return ++sectors; 8281e999736SAlan Cox } 8291e999736SAlan Cox 8301e999736SAlan Cox static u64 ata_tf_to_lba(struct ata_taskfile *tf) 8311e999736SAlan Cox { 8321e999736SAlan Cox u64 sectors = 0; 8331e999736SAlan Cox 8341e999736SAlan Cox sectors |= (tf->device & 0x0f) << 24; 8351e999736SAlan Cox sectors |= (tf->lbah & 0xff) << 16; 8361e999736SAlan Cox sectors |= (tf->lbam & 0xff) << 8; 8371e999736SAlan Cox sectors |= (tf->lbal & 0xff); 8381e999736SAlan Cox 8391e999736SAlan Cox return ++sectors; 8401e999736SAlan Cox } 8411e999736SAlan Cox 8421e999736SAlan Cox /** 8431e999736SAlan Cox * ata_read_native_max_address_ext - LBA48 native max query 8441e999736SAlan Cox * @dev: Device to query 8451e999736SAlan Cox * 8461e999736SAlan Cox * Perform an LBA48 size query upon the device in question. Return the 8471e999736SAlan Cox * actual LBA48 size or zero if the command fails. 8481e999736SAlan Cox */ 8491e999736SAlan Cox 8501e999736SAlan Cox static u64 ata_read_native_max_address_ext(struct ata_device *dev) 8511e999736SAlan Cox { 8521e999736SAlan Cox unsigned int err; 8531e999736SAlan Cox struct ata_taskfile tf; 8541e999736SAlan Cox 8551e999736SAlan Cox ata_tf_init(dev, &tf); 8561e999736SAlan Cox 8571e999736SAlan Cox tf.command = ATA_CMD_READ_NATIVE_MAX_EXT; 8581e999736SAlan Cox tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48 | ATA_TFLAG_ISADDR; 8591e999736SAlan Cox tf.protocol |= ATA_PROT_NODATA; 8601e999736SAlan Cox tf.device |= 0x40; 8611e999736SAlan Cox 8621e999736SAlan Cox err = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0); 8631e999736SAlan Cox if (err) 8641e999736SAlan Cox return 0; 8651e999736SAlan Cox 8661e999736SAlan Cox return ata_tf_to_lba48(&tf); 8671e999736SAlan Cox } 8681e999736SAlan Cox 8691e999736SAlan Cox /** 8701e999736SAlan Cox * ata_read_native_max_address - LBA28 native max query 8711e999736SAlan Cox * @dev: Device to query 8721e999736SAlan Cox * 8731e999736SAlan Cox * Performa an LBA28 size query upon the device in question. Return the 8741e999736SAlan Cox * actual LBA28 size or zero if the command fails. 8751e999736SAlan Cox */ 8761e999736SAlan Cox 8771e999736SAlan Cox static u64 ata_read_native_max_address(struct ata_device *dev) 8781e999736SAlan Cox { 8791e999736SAlan Cox unsigned int err; 8801e999736SAlan Cox struct ata_taskfile tf; 8811e999736SAlan Cox 8821e999736SAlan Cox ata_tf_init(dev, &tf); 8831e999736SAlan Cox 8841e999736SAlan Cox tf.command = ATA_CMD_READ_NATIVE_MAX; 8851e999736SAlan Cox tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; 8861e999736SAlan Cox tf.protocol |= ATA_PROT_NODATA; 8871e999736SAlan Cox tf.device |= 0x40; 8881e999736SAlan Cox 8891e999736SAlan Cox err = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0); 8901e999736SAlan Cox if (err) 8911e999736SAlan Cox return 0; 8921e999736SAlan Cox 8931e999736SAlan Cox return ata_tf_to_lba(&tf); 8941e999736SAlan Cox } 8951e999736SAlan Cox 8961e999736SAlan Cox /** 8971e999736SAlan Cox * ata_set_native_max_address_ext - LBA48 native max set 8981e999736SAlan Cox * @dev: Device to query 8996b38d1d1SRandy Dunlap * @new_sectors: new max sectors value to set for the device 9001e999736SAlan Cox * 9011e999736SAlan Cox * Perform an LBA48 size set max upon the device in question. Return the 9021e999736SAlan Cox * actual LBA48 size or zero if the command fails. 9031e999736SAlan Cox */ 9041e999736SAlan Cox 9051e999736SAlan Cox static u64 ata_set_native_max_address_ext(struct ata_device *dev, u64 new_sectors) 9061e999736SAlan Cox { 9071e999736SAlan Cox unsigned int err; 9081e999736SAlan Cox struct ata_taskfile tf; 9091e999736SAlan Cox 9101e999736SAlan Cox new_sectors--; 9111e999736SAlan Cox 9121e999736SAlan Cox ata_tf_init(dev, &tf); 9131e999736SAlan Cox 9141e999736SAlan Cox tf.command = ATA_CMD_SET_MAX_EXT; 9151e999736SAlan Cox tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48 | ATA_TFLAG_ISADDR; 9161e999736SAlan Cox tf.protocol |= ATA_PROT_NODATA; 9171e999736SAlan Cox tf.device |= 0x40; 9181e999736SAlan Cox 9191e999736SAlan Cox tf.lbal = (new_sectors >> 0) & 0xff; 9201e999736SAlan Cox tf.lbam = (new_sectors >> 8) & 0xff; 9211e999736SAlan Cox tf.lbah = (new_sectors >> 16) & 0xff; 9221e999736SAlan Cox 9231e999736SAlan Cox tf.hob_lbal = (new_sectors >> 24) & 0xff; 9241e999736SAlan Cox tf.hob_lbam = (new_sectors >> 32) & 0xff; 9251e999736SAlan Cox tf.hob_lbah = (new_sectors >> 40) & 0xff; 9261e999736SAlan Cox 9271e999736SAlan Cox err = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0); 9281e999736SAlan Cox if (err) 9291e999736SAlan Cox return 0; 9301e999736SAlan Cox 9311e999736SAlan Cox return ata_tf_to_lba48(&tf); 9321e999736SAlan Cox } 9331e999736SAlan Cox 9341e999736SAlan Cox /** 9351e999736SAlan Cox * ata_set_native_max_address - LBA28 native max set 9361e999736SAlan Cox * @dev: Device to query 9376b38d1d1SRandy Dunlap * @new_sectors: new max sectors value to set for the device 9381e999736SAlan Cox * 9391e999736SAlan Cox * Perform an LBA28 size set max upon the device in question. Return the 9401e999736SAlan Cox * actual LBA28 size or zero if the command fails. 9411e999736SAlan Cox */ 9421e999736SAlan Cox 9431e999736SAlan Cox static u64 ata_set_native_max_address(struct ata_device *dev, u64 new_sectors) 9441e999736SAlan Cox { 9451e999736SAlan Cox unsigned int err; 9461e999736SAlan Cox struct ata_taskfile tf; 9471e999736SAlan Cox 9481e999736SAlan Cox new_sectors--; 9491e999736SAlan Cox 9501e999736SAlan Cox ata_tf_init(dev, &tf); 9511e999736SAlan Cox 9521e999736SAlan Cox tf.command = ATA_CMD_SET_MAX; 9531e999736SAlan Cox tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; 9541e999736SAlan Cox tf.protocol |= ATA_PROT_NODATA; 9551e999736SAlan Cox 9561e999736SAlan Cox tf.lbal = (new_sectors >> 0) & 0xff; 9571e999736SAlan Cox tf.lbam = (new_sectors >> 8) & 0xff; 9581e999736SAlan Cox tf.lbah = (new_sectors >> 16) & 0xff; 9591e999736SAlan Cox tf.device |= ((new_sectors >> 24) & 0x0f) | 0x40; 9601e999736SAlan Cox 9611e999736SAlan Cox err = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0); 9621e999736SAlan Cox if (err) 9631e999736SAlan Cox return 0; 9641e999736SAlan Cox 9651e999736SAlan Cox return ata_tf_to_lba(&tf); 9661e999736SAlan Cox } 9671e999736SAlan Cox 9681e999736SAlan Cox /** 9691e999736SAlan Cox * ata_hpa_resize - Resize a device with an HPA set 9701e999736SAlan Cox * @dev: Device to resize 9711e999736SAlan Cox * 9721e999736SAlan Cox * Read the size of an LBA28 or LBA48 disk with HPA features and resize 9731e999736SAlan Cox * it if required to the full size of the media. The caller must check 9741e999736SAlan Cox * the drive has the HPA feature set enabled. 9751e999736SAlan Cox */ 9761e999736SAlan Cox 9771e999736SAlan Cox static u64 ata_hpa_resize(struct ata_device *dev) 9781e999736SAlan Cox { 9791e999736SAlan Cox u64 sectors = dev->n_sectors; 9801e999736SAlan Cox u64 hpa_sectors; 9811e999736SAlan Cox 9821e999736SAlan Cox if (ata_id_has_lba48(dev->id)) 9831e999736SAlan Cox hpa_sectors = ata_read_native_max_address_ext(dev); 9841e999736SAlan Cox else 9851e999736SAlan Cox hpa_sectors = ata_read_native_max_address(dev); 9861e999736SAlan Cox 9871e999736SAlan Cox if (hpa_sectors > sectors) { 9881e999736SAlan Cox ata_dev_printk(dev, KERN_INFO, 9891e999736SAlan Cox "Host Protected Area detected:\n" 9901e999736SAlan Cox "\tcurrent size: %lld sectors\n" 9911e999736SAlan Cox "\tnative size: %lld sectors\n", 992bd1d5ec6SAndrew Morton (long long)sectors, (long long)hpa_sectors); 9931e999736SAlan Cox 9941e999736SAlan Cox if (ata_ignore_hpa) { 9951e999736SAlan Cox if (ata_id_has_lba48(dev->id)) 9961e999736SAlan Cox hpa_sectors = ata_set_native_max_address_ext(dev, hpa_sectors); 9971e999736SAlan Cox else 998bd1d5ec6SAndrew Morton hpa_sectors = ata_set_native_max_address(dev, 999bd1d5ec6SAndrew Morton hpa_sectors); 10001e999736SAlan Cox 10011e999736SAlan Cox if (hpa_sectors) { 1002bd1d5ec6SAndrew Morton ata_dev_printk(dev, KERN_INFO, "native size " 1003bd1d5ec6SAndrew Morton "increased to %lld sectors\n", 1004bd1d5ec6SAndrew Morton (long long)hpa_sectors); 10051e999736SAlan Cox return hpa_sectors; 10061e999736SAlan Cox } 10071e999736SAlan Cox } 100837301a55STejun Heo } else if (hpa_sectors < sectors) 100937301a55STejun Heo ata_dev_printk(dev, KERN_WARNING, "%s 1: hpa sectors (%lld) " 101037301a55STejun Heo "is smaller than sectors (%lld)\n", __FUNCTION__, 101137301a55STejun Heo (long long)hpa_sectors, (long long)sectors); 101237301a55STejun Heo 10131e999736SAlan Cox return sectors; 10141e999736SAlan Cox } 10151e999736SAlan Cox 1016c6fd2807SJeff Garzik static u64 ata_id_n_sectors(const u16 *id) 1017c6fd2807SJeff Garzik { 1018c6fd2807SJeff Garzik if (ata_id_has_lba(id)) { 1019c6fd2807SJeff Garzik if (ata_id_has_lba48(id)) 1020c6fd2807SJeff Garzik return ata_id_u64(id, 100); 1021c6fd2807SJeff Garzik else 1022c6fd2807SJeff Garzik return ata_id_u32(id, 60); 1023c6fd2807SJeff Garzik } else { 1024c6fd2807SJeff Garzik if (ata_id_current_chs_valid(id)) 1025c6fd2807SJeff Garzik return ata_id_u32(id, 57); 1026c6fd2807SJeff Garzik else 1027c6fd2807SJeff Garzik return id[1] * id[3] * id[6]; 1028c6fd2807SJeff Garzik } 1029c6fd2807SJeff Garzik } 1030c6fd2807SJeff Garzik 1031c6fd2807SJeff Garzik /** 103210305f0fSAlan * ata_id_to_dma_mode - Identify DMA mode from id block 103310305f0fSAlan * @dev: device to identify 1034cc261267SRandy Dunlap * @unknown: mode to assume if we cannot tell 103510305f0fSAlan * 103610305f0fSAlan * Set up the timing values for the device based upon the identify 103710305f0fSAlan * reported values for the DMA mode. This function is used by drivers 103810305f0fSAlan * which rely upon firmware configured modes, but wish to report the 103910305f0fSAlan * mode correctly when possible. 104010305f0fSAlan * 104110305f0fSAlan * In addition we emit similarly formatted messages to the default 104210305f0fSAlan * ata_dev_set_mode handler, in order to provide consistency of 104310305f0fSAlan * presentation. 104410305f0fSAlan */ 104510305f0fSAlan 104610305f0fSAlan void ata_id_to_dma_mode(struct ata_device *dev, u8 unknown) 104710305f0fSAlan { 104810305f0fSAlan unsigned int mask; 104910305f0fSAlan u8 mode; 105010305f0fSAlan 105110305f0fSAlan /* Pack the DMA modes */ 105210305f0fSAlan mask = ((dev->id[63] >> 8) << ATA_SHIFT_MWDMA) & ATA_MASK_MWDMA; 105310305f0fSAlan if (dev->id[53] & 0x04) 105410305f0fSAlan mask |= ((dev->id[88] >> 8) << ATA_SHIFT_UDMA) & ATA_MASK_UDMA; 105510305f0fSAlan 105610305f0fSAlan /* Select the mode in use */ 105710305f0fSAlan mode = ata_xfer_mask2mode(mask); 105810305f0fSAlan 105910305f0fSAlan if (mode != 0) { 106010305f0fSAlan ata_dev_printk(dev, KERN_INFO, "configured for %s\n", 106110305f0fSAlan ata_mode_string(mask)); 106210305f0fSAlan } else { 106310305f0fSAlan /* SWDMA perhaps ? */ 106410305f0fSAlan mode = unknown; 106510305f0fSAlan ata_dev_printk(dev, KERN_INFO, "configured for DMA\n"); 106610305f0fSAlan } 106710305f0fSAlan 106810305f0fSAlan /* Configure the device reporting */ 106910305f0fSAlan dev->xfer_mode = mode; 107010305f0fSAlan dev->xfer_shift = ata_xfer_mode2shift(mode); 107110305f0fSAlan } 107210305f0fSAlan 107310305f0fSAlan /** 1074c6fd2807SJeff Garzik * ata_noop_dev_select - Select device 0/1 on ATA bus 1075c6fd2807SJeff Garzik * @ap: ATA channel to manipulate 1076c6fd2807SJeff Garzik * @device: ATA device (numbered from zero) to select 1077c6fd2807SJeff Garzik * 1078c6fd2807SJeff Garzik * This function performs no actual function. 1079c6fd2807SJeff Garzik * 1080c6fd2807SJeff Garzik * May be used as the dev_select() entry in ata_port_operations. 1081c6fd2807SJeff Garzik * 1082c6fd2807SJeff Garzik * LOCKING: 1083c6fd2807SJeff Garzik * caller. 1084c6fd2807SJeff Garzik */ 1085c6fd2807SJeff Garzik void ata_noop_dev_select (struct ata_port *ap, unsigned int device) 1086c6fd2807SJeff Garzik { 1087c6fd2807SJeff Garzik } 1088c6fd2807SJeff Garzik 1089c6fd2807SJeff Garzik 1090c6fd2807SJeff Garzik /** 1091c6fd2807SJeff Garzik * ata_std_dev_select - Select device 0/1 on ATA bus 1092c6fd2807SJeff Garzik * @ap: ATA channel to manipulate 1093c6fd2807SJeff Garzik * @device: ATA device (numbered from zero) to select 1094c6fd2807SJeff Garzik * 1095c6fd2807SJeff Garzik * Use the method defined in the ATA specification to 1096c6fd2807SJeff Garzik * make either device 0, or device 1, active on the 1097c6fd2807SJeff Garzik * ATA channel. Works with both PIO and MMIO. 1098c6fd2807SJeff Garzik * 1099c6fd2807SJeff Garzik * May be used as the dev_select() entry in ata_port_operations. 1100c6fd2807SJeff Garzik * 1101c6fd2807SJeff Garzik * LOCKING: 1102c6fd2807SJeff Garzik * caller. 1103c6fd2807SJeff Garzik */ 1104c6fd2807SJeff Garzik 1105c6fd2807SJeff Garzik void ata_std_dev_select (struct ata_port *ap, unsigned int device) 1106c6fd2807SJeff Garzik { 1107c6fd2807SJeff Garzik u8 tmp; 1108c6fd2807SJeff Garzik 1109c6fd2807SJeff Garzik if (device == 0) 1110c6fd2807SJeff Garzik tmp = ATA_DEVICE_OBS; 1111c6fd2807SJeff Garzik else 1112c6fd2807SJeff Garzik tmp = ATA_DEVICE_OBS | ATA_DEV1; 1113c6fd2807SJeff Garzik 11140d5ff566STejun Heo iowrite8(tmp, ap->ioaddr.device_addr); 1115c6fd2807SJeff Garzik ata_pause(ap); /* needed; also flushes, for mmio */ 1116c6fd2807SJeff Garzik } 1117c6fd2807SJeff Garzik 1118c6fd2807SJeff Garzik /** 1119c6fd2807SJeff Garzik * ata_dev_select - Select device 0/1 on ATA bus 1120c6fd2807SJeff Garzik * @ap: ATA channel to manipulate 1121c6fd2807SJeff Garzik * @device: ATA device (numbered from zero) to select 1122c6fd2807SJeff Garzik * @wait: non-zero to wait for Status register BSY bit to clear 1123c6fd2807SJeff Garzik * @can_sleep: non-zero if context allows sleeping 1124c6fd2807SJeff Garzik * 1125c6fd2807SJeff Garzik * Use the method defined in the ATA specification to 1126c6fd2807SJeff Garzik * make either device 0, or device 1, active on the 1127c6fd2807SJeff Garzik * ATA channel. 1128c6fd2807SJeff Garzik * 1129c6fd2807SJeff Garzik * This is a high-level version of ata_std_dev_select(), 1130c6fd2807SJeff Garzik * which additionally provides the services of inserting 1131c6fd2807SJeff Garzik * the proper pauses and status polling, where needed. 1132c6fd2807SJeff Garzik * 1133c6fd2807SJeff Garzik * LOCKING: 1134c6fd2807SJeff Garzik * caller. 1135c6fd2807SJeff Garzik */ 1136c6fd2807SJeff Garzik 1137c6fd2807SJeff Garzik void ata_dev_select(struct ata_port *ap, unsigned int device, 1138c6fd2807SJeff Garzik unsigned int wait, unsigned int can_sleep) 1139c6fd2807SJeff Garzik { 1140c6fd2807SJeff Garzik if (ata_msg_probe(ap)) 114144877b4eSTejun Heo ata_port_printk(ap, KERN_INFO, "ata_dev_select: ENTER, " 114244877b4eSTejun Heo "device %u, wait %u\n", device, wait); 1143c6fd2807SJeff Garzik 1144c6fd2807SJeff Garzik if (wait) 1145c6fd2807SJeff Garzik ata_wait_idle(ap); 1146c6fd2807SJeff Garzik 1147c6fd2807SJeff Garzik ap->ops->dev_select(ap, device); 1148c6fd2807SJeff Garzik 1149c6fd2807SJeff Garzik if (wait) { 1150c6fd2807SJeff Garzik if (can_sleep && ap->device[device].class == ATA_DEV_ATAPI) 1151c6fd2807SJeff Garzik msleep(150); 1152c6fd2807SJeff Garzik ata_wait_idle(ap); 1153c6fd2807SJeff Garzik } 1154c6fd2807SJeff Garzik } 1155c6fd2807SJeff Garzik 1156c6fd2807SJeff Garzik /** 1157c6fd2807SJeff Garzik * ata_dump_id - IDENTIFY DEVICE info debugging output 1158c6fd2807SJeff Garzik * @id: IDENTIFY DEVICE page to dump 1159c6fd2807SJeff Garzik * 1160c6fd2807SJeff Garzik * Dump selected 16-bit words from the given IDENTIFY DEVICE 1161c6fd2807SJeff Garzik * page. 1162c6fd2807SJeff Garzik * 1163c6fd2807SJeff Garzik * LOCKING: 1164c6fd2807SJeff Garzik * caller. 1165c6fd2807SJeff Garzik */ 1166c6fd2807SJeff Garzik 1167c6fd2807SJeff Garzik static inline void ata_dump_id(const u16 *id) 1168c6fd2807SJeff Garzik { 1169c6fd2807SJeff Garzik DPRINTK("49==0x%04x " 1170c6fd2807SJeff Garzik "53==0x%04x " 1171c6fd2807SJeff Garzik "63==0x%04x " 1172c6fd2807SJeff Garzik "64==0x%04x " 1173c6fd2807SJeff Garzik "75==0x%04x \n", 1174c6fd2807SJeff Garzik id[49], 1175c6fd2807SJeff Garzik id[53], 1176c6fd2807SJeff Garzik id[63], 1177c6fd2807SJeff Garzik id[64], 1178c6fd2807SJeff Garzik id[75]); 1179c6fd2807SJeff Garzik DPRINTK("80==0x%04x " 1180c6fd2807SJeff Garzik "81==0x%04x " 1181c6fd2807SJeff Garzik "82==0x%04x " 1182c6fd2807SJeff Garzik "83==0x%04x " 1183c6fd2807SJeff Garzik "84==0x%04x \n", 1184c6fd2807SJeff Garzik id[80], 1185c6fd2807SJeff Garzik id[81], 1186c6fd2807SJeff Garzik id[82], 1187c6fd2807SJeff Garzik id[83], 1188c6fd2807SJeff Garzik id[84]); 1189c6fd2807SJeff Garzik DPRINTK("88==0x%04x " 1190c6fd2807SJeff Garzik "93==0x%04x\n", 1191c6fd2807SJeff Garzik id[88], 1192c6fd2807SJeff Garzik id[93]); 1193c6fd2807SJeff Garzik } 1194c6fd2807SJeff Garzik 1195c6fd2807SJeff Garzik /** 1196c6fd2807SJeff Garzik * ata_id_xfermask - Compute xfermask from the given IDENTIFY data 1197c6fd2807SJeff Garzik * @id: IDENTIFY data to compute xfer mask from 1198c6fd2807SJeff Garzik * 1199c6fd2807SJeff Garzik * Compute the xfermask for this device. This is not as trivial 1200c6fd2807SJeff Garzik * as it seems if we must consider early devices correctly. 1201c6fd2807SJeff Garzik * 1202c6fd2807SJeff Garzik * FIXME: pre IDE drive timing (do we care ?). 1203c6fd2807SJeff Garzik * 1204c6fd2807SJeff Garzik * LOCKING: 1205c6fd2807SJeff Garzik * None. 1206c6fd2807SJeff Garzik * 1207c6fd2807SJeff Garzik * RETURNS: 1208c6fd2807SJeff Garzik * Computed xfermask 1209c6fd2807SJeff Garzik */ 1210c6fd2807SJeff Garzik static unsigned int ata_id_xfermask(const u16 *id) 1211c6fd2807SJeff Garzik { 1212c6fd2807SJeff Garzik unsigned int pio_mask, mwdma_mask, udma_mask; 1213c6fd2807SJeff Garzik 1214c6fd2807SJeff Garzik /* Usual case. Word 53 indicates word 64 is valid */ 1215c6fd2807SJeff Garzik if (id[ATA_ID_FIELD_VALID] & (1 << 1)) { 1216c6fd2807SJeff Garzik pio_mask = id[ATA_ID_PIO_MODES] & 0x03; 1217c6fd2807SJeff Garzik pio_mask <<= 3; 1218c6fd2807SJeff Garzik pio_mask |= 0x7; 1219c6fd2807SJeff Garzik } else { 1220c6fd2807SJeff Garzik /* If word 64 isn't valid then Word 51 high byte holds 1221c6fd2807SJeff Garzik * the PIO timing number for the maximum. Turn it into 1222c6fd2807SJeff Garzik * a mask. 1223c6fd2807SJeff Garzik */ 12247a0f1c8aSLennert Buytenhek u8 mode = (id[ATA_ID_OLD_PIO_MODES] >> 8) & 0xFF; 122546767aebSAlan Cox if (mode < 5) /* Valid PIO range */ 122646767aebSAlan Cox pio_mask = (2 << mode) - 1; 122746767aebSAlan Cox else 122846767aebSAlan Cox pio_mask = 1; 1229c6fd2807SJeff Garzik 1230c6fd2807SJeff Garzik /* But wait.. there's more. Design your standards by 1231c6fd2807SJeff Garzik * committee and you too can get a free iordy field to 1232c6fd2807SJeff Garzik * process. However its the speeds not the modes that 1233c6fd2807SJeff Garzik * are supported... Note drivers using the timing API 1234c6fd2807SJeff Garzik * will get this right anyway 1235c6fd2807SJeff Garzik */ 1236c6fd2807SJeff Garzik } 1237c6fd2807SJeff Garzik 1238c6fd2807SJeff Garzik mwdma_mask = id[ATA_ID_MWDMA_MODES] & 0x07; 1239c6fd2807SJeff Garzik 1240b352e57dSAlan Cox if (ata_id_is_cfa(id)) { 1241b352e57dSAlan Cox /* 1242b352e57dSAlan Cox * Process compact flash extended modes 1243b352e57dSAlan Cox */ 1244b352e57dSAlan Cox int pio = id[163] & 0x7; 1245b352e57dSAlan Cox int dma = (id[163] >> 3) & 7; 1246b352e57dSAlan Cox 1247b352e57dSAlan Cox if (pio) 1248b352e57dSAlan Cox pio_mask |= (1 << 5); 1249b352e57dSAlan Cox if (pio > 1) 1250b352e57dSAlan Cox pio_mask |= (1 << 6); 1251b352e57dSAlan Cox if (dma) 1252b352e57dSAlan Cox mwdma_mask |= (1 << 3); 1253b352e57dSAlan Cox if (dma > 1) 1254b352e57dSAlan Cox mwdma_mask |= (1 << 4); 1255b352e57dSAlan Cox } 1256b352e57dSAlan Cox 1257c6fd2807SJeff Garzik udma_mask = 0; 1258c6fd2807SJeff Garzik if (id[ATA_ID_FIELD_VALID] & (1 << 2)) 1259c6fd2807SJeff Garzik udma_mask = id[ATA_ID_UDMA_MODES] & 0xff; 1260c6fd2807SJeff Garzik 1261c6fd2807SJeff Garzik return ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask); 1262c6fd2807SJeff Garzik } 1263c6fd2807SJeff Garzik 1264c6fd2807SJeff Garzik /** 1265c6fd2807SJeff Garzik * ata_port_queue_task - Queue port_task 1266c6fd2807SJeff Garzik * @ap: The ata_port to queue port_task for 1267c6fd2807SJeff Garzik * @fn: workqueue function to be scheduled 126865f27f38SDavid Howells * @data: data for @fn to use 1269c6fd2807SJeff Garzik * @delay: delay time for workqueue function 1270c6fd2807SJeff Garzik * 1271c6fd2807SJeff Garzik * Schedule @fn(@data) for execution after @delay jiffies using 1272c6fd2807SJeff Garzik * port_task. There is one port_task per port and it's the 1273c6fd2807SJeff Garzik * user(low level driver)'s responsibility to make sure that only 1274c6fd2807SJeff Garzik * one task is active at any given time. 1275c6fd2807SJeff Garzik * 1276c6fd2807SJeff Garzik * libata core layer takes care of synchronization between 1277c6fd2807SJeff Garzik * port_task and EH. ata_port_queue_task() may be ignored for EH 1278c6fd2807SJeff Garzik * synchronization. 1279c6fd2807SJeff Garzik * 1280c6fd2807SJeff Garzik * LOCKING: 1281c6fd2807SJeff Garzik * Inherited from caller. 1282c6fd2807SJeff Garzik */ 128365f27f38SDavid Howells void ata_port_queue_task(struct ata_port *ap, work_func_t fn, void *data, 1284c6fd2807SJeff Garzik unsigned long delay) 1285c6fd2807SJeff Garzik { 128665f27f38SDavid Howells PREPARE_DELAYED_WORK(&ap->port_task, fn); 128765f27f38SDavid Howells ap->port_task_data = data; 1288c6fd2807SJeff Garzik 128945a66c1cSOleg Nesterov /* may fail if ata_port_flush_task() in progress */ 129045a66c1cSOleg Nesterov queue_delayed_work(ata_wq, &ap->port_task, delay); 1291c6fd2807SJeff Garzik } 1292c6fd2807SJeff Garzik 1293c6fd2807SJeff Garzik /** 1294c6fd2807SJeff Garzik * ata_port_flush_task - Flush port_task 1295c6fd2807SJeff Garzik * @ap: The ata_port to flush port_task for 1296c6fd2807SJeff Garzik * 1297c6fd2807SJeff Garzik * After this function completes, port_task is guranteed not to 1298c6fd2807SJeff Garzik * be running or scheduled. 1299c6fd2807SJeff Garzik * 1300c6fd2807SJeff Garzik * LOCKING: 1301c6fd2807SJeff Garzik * Kernel thread context (may sleep) 1302c6fd2807SJeff Garzik */ 1303c6fd2807SJeff Garzik void ata_port_flush_task(struct ata_port *ap) 1304c6fd2807SJeff Garzik { 1305c6fd2807SJeff Garzik DPRINTK("ENTER\n"); 1306c6fd2807SJeff Garzik 130745a66c1cSOleg Nesterov cancel_rearming_delayed_work(&ap->port_task); 1308c6fd2807SJeff Garzik 1309c6fd2807SJeff Garzik if (ata_msg_ctl(ap)) 1310c6fd2807SJeff Garzik ata_port_printk(ap, KERN_DEBUG, "%s: EXIT\n", __FUNCTION__); 1311c6fd2807SJeff Garzik } 1312c6fd2807SJeff Garzik 13137102d230SAdrian Bunk static void ata_qc_complete_internal(struct ata_queued_cmd *qc) 1314c6fd2807SJeff Garzik { 1315c6fd2807SJeff Garzik struct completion *waiting = qc->private_data; 1316c6fd2807SJeff Garzik 1317c6fd2807SJeff Garzik complete(waiting); 1318c6fd2807SJeff Garzik } 1319c6fd2807SJeff Garzik 1320c6fd2807SJeff Garzik /** 13212432697bSTejun Heo * ata_exec_internal_sg - execute libata internal command 1322c6fd2807SJeff Garzik * @dev: Device to which the command is sent 1323c6fd2807SJeff Garzik * @tf: Taskfile registers for the command and the result 1324c6fd2807SJeff Garzik * @cdb: CDB for packet command 1325c6fd2807SJeff Garzik * @dma_dir: Data tranfer direction of the command 13262432697bSTejun Heo * @sg: sg list for the data buffer of the command 13272432697bSTejun Heo * @n_elem: Number of sg entries 1328c6fd2807SJeff Garzik * 1329c6fd2807SJeff Garzik * Executes libata internal command with timeout. @tf contains 1330c6fd2807SJeff Garzik * command on entry and result on return. Timeout and error 1331c6fd2807SJeff Garzik * conditions are reported via return value. No recovery action 1332c6fd2807SJeff Garzik * is taken after a command times out. It's caller's duty to 1333c6fd2807SJeff Garzik * clean up after timeout. 1334c6fd2807SJeff Garzik * 1335c6fd2807SJeff Garzik * LOCKING: 1336c6fd2807SJeff Garzik * None. Should be called with kernel context, might sleep. 1337c6fd2807SJeff Garzik * 1338c6fd2807SJeff Garzik * RETURNS: 1339c6fd2807SJeff Garzik * Zero on success, AC_ERR_* mask on failure 1340c6fd2807SJeff Garzik */ 13412432697bSTejun Heo unsigned ata_exec_internal_sg(struct ata_device *dev, 1342c6fd2807SJeff Garzik struct ata_taskfile *tf, const u8 *cdb, 13432432697bSTejun Heo int dma_dir, struct scatterlist *sg, 13442432697bSTejun Heo unsigned int n_elem) 1345c6fd2807SJeff Garzik { 1346c6fd2807SJeff Garzik struct ata_port *ap = dev->ap; 1347c6fd2807SJeff Garzik u8 command = tf->command; 1348c6fd2807SJeff Garzik struct ata_queued_cmd *qc; 1349c6fd2807SJeff Garzik unsigned int tag, preempted_tag; 1350c6fd2807SJeff Garzik u32 preempted_sactive, preempted_qc_active; 1351c6fd2807SJeff Garzik DECLARE_COMPLETION_ONSTACK(wait); 1352c6fd2807SJeff Garzik unsigned long flags; 1353c6fd2807SJeff Garzik unsigned int err_mask; 1354c6fd2807SJeff Garzik int rc; 1355c6fd2807SJeff Garzik 1356c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 1357c6fd2807SJeff Garzik 1358c6fd2807SJeff Garzik /* no internal command while frozen */ 1359c6fd2807SJeff Garzik if (ap->pflags & ATA_PFLAG_FROZEN) { 1360c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 1361c6fd2807SJeff Garzik return AC_ERR_SYSTEM; 1362c6fd2807SJeff Garzik } 1363c6fd2807SJeff Garzik 1364c6fd2807SJeff Garzik /* initialize internal qc */ 1365c6fd2807SJeff Garzik 1366c6fd2807SJeff Garzik /* XXX: Tag 0 is used for drivers with legacy EH as some 1367c6fd2807SJeff Garzik * drivers choke if any other tag is given. This breaks 1368c6fd2807SJeff Garzik * ata_tag_internal() test for those drivers. Don't use new 1369c6fd2807SJeff Garzik * EH stuff without converting to it. 1370c6fd2807SJeff Garzik */ 1371c6fd2807SJeff Garzik if (ap->ops->error_handler) 1372c6fd2807SJeff Garzik tag = ATA_TAG_INTERNAL; 1373c6fd2807SJeff Garzik else 1374c6fd2807SJeff Garzik tag = 0; 1375c6fd2807SJeff Garzik 1376c6fd2807SJeff Garzik if (test_and_set_bit(tag, &ap->qc_allocated)) 1377c6fd2807SJeff Garzik BUG(); 1378c6fd2807SJeff Garzik qc = __ata_qc_from_tag(ap, tag); 1379c6fd2807SJeff Garzik 1380c6fd2807SJeff Garzik qc->tag = tag; 1381c6fd2807SJeff Garzik qc->scsicmd = NULL; 1382c6fd2807SJeff Garzik qc->ap = ap; 1383c6fd2807SJeff Garzik qc->dev = dev; 1384c6fd2807SJeff Garzik ata_qc_reinit(qc); 1385c6fd2807SJeff Garzik 1386c6fd2807SJeff Garzik preempted_tag = ap->active_tag; 1387c6fd2807SJeff Garzik preempted_sactive = ap->sactive; 1388c6fd2807SJeff Garzik preempted_qc_active = ap->qc_active; 1389c6fd2807SJeff Garzik ap->active_tag = ATA_TAG_POISON; 1390c6fd2807SJeff Garzik ap->sactive = 0; 1391c6fd2807SJeff Garzik ap->qc_active = 0; 1392c6fd2807SJeff Garzik 1393c6fd2807SJeff Garzik /* prepare & issue qc */ 1394c6fd2807SJeff Garzik qc->tf = *tf; 1395c6fd2807SJeff Garzik if (cdb) 1396c6fd2807SJeff Garzik memcpy(qc->cdb, cdb, ATAPI_CDB_LEN); 1397c6fd2807SJeff Garzik qc->flags |= ATA_QCFLAG_RESULT_TF; 1398c6fd2807SJeff Garzik qc->dma_dir = dma_dir; 1399c6fd2807SJeff Garzik if (dma_dir != DMA_NONE) { 14002432697bSTejun Heo unsigned int i, buflen = 0; 14012432697bSTejun Heo 14022432697bSTejun Heo for (i = 0; i < n_elem; i++) 14032432697bSTejun Heo buflen += sg[i].length; 14042432697bSTejun Heo 14052432697bSTejun Heo ata_sg_init(qc, sg, n_elem); 140649c80429SBrian King qc->nbytes = buflen; 1407c6fd2807SJeff Garzik } 1408c6fd2807SJeff Garzik 1409c6fd2807SJeff Garzik qc->private_data = &wait; 1410c6fd2807SJeff Garzik qc->complete_fn = ata_qc_complete_internal; 1411c6fd2807SJeff Garzik 1412c6fd2807SJeff Garzik ata_qc_issue(qc); 1413c6fd2807SJeff Garzik 1414c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 1415c6fd2807SJeff Garzik 1416c6fd2807SJeff Garzik rc = wait_for_completion_timeout(&wait, ata_probe_timeout); 1417c6fd2807SJeff Garzik 1418c6fd2807SJeff Garzik ata_port_flush_task(ap); 1419c6fd2807SJeff Garzik 1420c6fd2807SJeff Garzik if (!rc) { 1421c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 1422c6fd2807SJeff Garzik 1423c6fd2807SJeff Garzik /* We're racing with irq here. If we lose, the 1424c6fd2807SJeff Garzik * following test prevents us from completing the qc 1425c6fd2807SJeff Garzik * twice. If we win, the port is frozen and will be 1426c6fd2807SJeff Garzik * cleaned up by ->post_internal_cmd(). 1427c6fd2807SJeff Garzik */ 1428c6fd2807SJeff Garzik if (qc->flags & ATA_QCFLAG_ACTIVE) { 1429c6fd2807SJeff Garzik qc->err_mask |= AC_ERR_TIMEOUT; 1430c6fd2807SJeff Garzik 1431c6fd2807SJeff Garzik if (ap->ops->error_handler) 1432c6fd2807SJeff Garzik ata_port_freeze(ap); 1433c6fd2807SJeff Garzik else 1434c6fd2807SJeff Garzik ata_qc_complete(qc); 1435c6fd2807SJeff Garzik 1436c6fd2807SJeff Garzik if (ata_msg_warn(ap)) 1437c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_WARNING, 1438c6fd2807SJeff Garzik "qc timeout (cmd 0x%x)\n", command); 1439c6fd2807SJeff Garzik } 1440c6fd2807SJeff Garzik 1441c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 1442c6fd2807SJeff Garzik } 1443c6fd2807SJeff Garzik 1444c6fd2807SJeff Garzik /* do post_internal_cmd */ 1445c6fd2807SJeff Garzik if (ap->ops->post_internal_cmd) 1446c6fd2807SJeff Garzik ap->ops->post_internal_cmd(qc); 1447c6fd2807SJeff Garzik 1448a51d644aSTejun Heo /* perform minimal error analysis */ 1449a51d644aSTejun Heo if (qc->flags & ATA_QCFLAG_FAILED) { 1450a51d644aSTejun Heo if (qc->result_tf.command & (ATA_ERR | ATA_DF)) 1451a51d644aSTejun Heo qc->err_mask |= AC_ERR_DEV; 1452a51d644aSTejun Heo 1453a51d644aSTejun Heo if (!qc->err_mask) 1454c6fd2807SJeff Garzik qc->err_mask |= AC_ERR_OTHER; 1455a51d644aSTejun Heo 1456a51d644aSTejun Heo if (qc->err_mask & ~AC_ERR_OTHER) 1457a51d644aSTejun Heo qc->err_mask &= ~AC_ERR_OTHER; 1458c6fd2807SJeff Garzik } 1459c6fd2807SJeff Garzik 1460c6fd2807SJeff Garzik /* finish up */ 1461c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 1462c6fd2807SJeff Garzik 1463c6fd2807SJeff Garzik *tf = qc->result_tf; 1464c6fd2807SJeff Garzik err_mask = qc->err_mask; 1465c6fd2807SJeff Garzik 1466c6fd2807SJeff Garzik ata_qc_free(qc); 1467c6fd2807SJeff Garzik ap->active_tag = preempted_tag; 1468c6fd2807SJeff Garzik ap->sactive = preempted_sactive; 1469c6fd2807SJeff Garzik ap->qc_active = preempted_qc_active; 1470c6fd2807SJeff Garzik 1471c6fd2807SJeff Garzik /* XXX - Some LLDDs (sata_mv) disable port on command failure. 1472c6fd2807SJeff Garzik * Until those drivers are fixed, we detect the condition 1473c6fd2807SJeff Garzik * here, fail the command with AC_ERR_SYSTEM and reenable the 1474c6fd2807SJeff Garzik * port. 1475c6fd2807SJeff Garzik * 1476c6fd2807SJeff Garzik * Note that this doesn't change any behavior as internal 1477c6fd2807SJeff Garzik * command failure results in disabling the device in the 1478c6fd2807SJeff Garzik * higher layer for LLDDs without new reset/EH callbacks. 1479c6fd2807SJeff Garzik * 1480c6fd2807SJeff Garzik * Kill the following code as soon as those drivers are fixed. 1481c6fd2807SJeff Garzik */ 1482c6fd2807SJeff Garzik if (ap->flags & ATA_FLAG_DISABLED) { 1483c6fd2807SJeff Garzik err_mask |= AC_ERR_SYSTEM; 1484c6fd2807SJeff Garzik ata_port_probe(ap); 1485c6fd2807SJeff Garzik } 1486c6fd2807SJeff Garzik 1487c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 1488c6fd2807SJeff Garzik 1489c6fd2807SJeff Garzik return err_mask; 1490c6fd2807SJeff Garzik } 1491c6fd2807SJeff Garzik 1492c6fd2807SJeff Garzik /** 149333480a0eSTejun Heo * ata_exec_internal - execute libata internal command 14942432697bSTejun Heo * @dev: Device to which the command is sent 14952432697bSTejun Heo * @tf: Taskfile registers for the command and the result 14962432697bSTejun Heo * @cdb: CDB for packet command 14972432697bSTejun Heo * @dma_dir: Data tranfer direction of the command 14982432697bSTejun Heo * @buf: Data buffer of the command 14992432697bSTejun Heo * @buflen: Length of data buffer 15002432697bSTejun Heo * 15012432697bSTejun Heo * Wrapper around ata_exec_internal_sg() which takes simple 15022432697bSTejun Heo * buffer instead of sg list. 15032432697bSTejun Heo * 15042432697bSTejun Heo * LOCKING: 15052432697bSTejun Heo * None. Should be called with kernel context, might sleep. 15062432697bSTejun Heo * 15072432697bSTejun Heo * RETURNS: 15082432697bSTejun Heo * Zero on success, AC_ERR_* mask on failure 15092432697bSTejun Heo */ 15102432697bSTejun Heo unsigned ata_exec_internal(struct ata_device *dev, 15112432697bSTejun Heo struct ata_taskfile *tf, const u8 *cdb, 15122432697bSTejun Heo int dma_dir, void *buf, unsigned int buflen) 15132432697bSTejun Heo { 151433480a0eSTejun Heo struct scatterlist *psg = NULL, sg; 151533480a0eSTejun Heo unsigned int n_elem = 0; 15162432697bSTejun Heo 151733480a0eSTejun Heo if (dma_dir != DMA_NONE) { 151833480a0eSTejun Heo WARN_ON(!buf); 15192432697bSTejun Heo sg_init_one(&sg, buf, buflen); 152033480a0eSTejun Heo psg = &sg; 152133480a0eSTejun Heo n_elem++; 152233480a0eSTejun Heo } 15232432697bSTejun Heo 152433480a0eSTejun Heo return ata_exec_internal_sg(dev, tf, cdb, dma_dir, psg, n_elem); 15252432697bSTejun Heo } 15262432697bSTejun Heo 15272432697bSTejun Heo /** 1528c6fd2807SJeff Garzik * ata_do_simple_cmd - execute simple internal command 1529c6fd2807SJeff Garzik * @dev: Device to which the command is sent 1530c6fd2807SJeff Garzik * @cmd: Opcode to execute 1531c6fd2807SJeff Garzik * 1532c6fd2807SJeff Garzik * Execute a 'simple' command, that only consists of the opcode 1533c6fd2807SJeff Garzik * 'cmd' itself, without filling any other registers 1534c6fd2807SJeff Garzik * 1535c6fd2807SJeff Garzik * LOCKING: 1536c6fd2807SJeff Garzik * Kernel thread context (may sleep). 1537c6fd2807SJeff Garzik * 1538c6fd2807SJeff Garzik * RETURNS: 1539c6fd2807SJeff Garzik * Zero on success, AC_ERR_* mask on failure 1540c6fd2807SJeff Garzik */ 1541c6fd2807SJeff Garzik unsigned int ata_do_simple_cmd(struct ata_device *dev, u8 cmd) 1542c6fd2807SJeff Garzik { 1543c6fd2807SJeff Garzik struct ata_taskfile tf; 1544c6fd2807SJeff Garzik 1545c6fd2807SJeff Garzik ata_tf_init(dev, &tf); 1546c6fd2807SJeff Garzik 1547c6fd2807SJeff Garzik tf.command = cmd; 1548c6fd2807SJeff Garzik tf.flags |= ATA_TFLAG_DEVICE; 1549c6fd2807SJeff Garzik tf.protocol = ATA_PROT_NODATA; 1550c6fd2807SJeff Garzik 1551c6fd2807SJeff Garzik return ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0); 1552c6fd2807SJeff Garzik } 1553c6fd2807SJeff Garzik 1554c6fd2807SJeff Garzik /** 1555c6fd2807SJeff Garzik * ata_pio_need_iordy - check if iordy needed 1556c6fd2807SJeff Garzik * @adev: ATA device 1557c6fd2807SJeff Garzik * 1558c6fd2807SJeff Garzik * Check if the current speed of the device requires IORDY. Used 1559c6fd2807SJeff Garzik * by various controllers for chip configuration. 1560c6fd2807SJeff Garzik */ 1561c6fd2807SJeff Garzik 1562c6fd2807SJeff Garzik unsigned int ata_pio_need_iordy(const struct ata_device *adev) 1563c6fd2807SJeff Garzik { 1564432729f0SAlan Cox /* Controller doesn't support IORDY. Probably a pointless check 1565432729f0SAlan Cox as the caller should know this */ 1566432729f0SAlan Cox if (adev->ap->flags & ATA_FLAG_NO_IORDY) 1567c6fd2807SJeff Garzik return 0; 1568432729f0SAlan Cox /* PIO3 and higher it is mandatory */ 1569432729f0SAlan Cox if (adev->pio_mode > XFER_PIO_2) 1570c6fd2807SJeff Garzik return 1; 1571432729f0SAlan Cox /* We turn it on when possible */ 1572432729f0SAlan Cox if (ata_id_has_iordy(adev->id)) 1573432729f0SAlan Cox return 1; 1574432729f0SAlan Cox return 0; 1575432729f0SAlan Cox } 1576c6fd2807SJeff Garzik 1577432729f0SAlan Cox /** 1578432729f0SAlan Cox * ata_pio_mask_no_iordy - Return the non IORDY mask 1579432729f0SAlan Cox * @adev: ATA device 1580432729f0SAlan Cox * 1581432729f0SAlan Cox * Compute the highest mode possible if we are not using iordy. Return 1582432729f0SAlan Cox * -1 if no iordy mode is available. 1583432729f0SAlan Cox */ 1584432729f0SAlan Cox 1585432729f0SAlan Cox static u32 ata_pio_mask_no_iordy(const struct ata_device *adev) 1586432729f0SAlan Cox { 1587c6fd2807SJeff Garzik /* If we have no drive specific rule, then PIO 2 is non IORDY */ 1588c6fd2807SJeff Garzik if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE */ 1589432729f0SAlan Cox u16 pio = adev->id[ATA_ID_EIDE_PIO]; 1590c6fd2807SJeff Garzik /* Is the speed faster than the drive allows non IORDY ? */ 1591c6fd2807SJeff Garzik if (pio) { 1592c6fd2807SJeff Garzik /* This is cycle times not frequency - watch the logic! */ 1593c6fd2807SJeff Garzik if (pio > 240) /* PIO2 is 240nS per cycle */ 1594432729f0SAlan Cox return 3 << ATA_SHIFT_PIO; 1595432729f0SAlan Cox return 7 << ATA_SHIFT_PIO; 1596c6fd2807SJeff Garzik } 1597c6fd2807SJeff Garzik } 1598432729f0SAlan Cox return 3 << ATA_SHIFT_PIO; 1599c6fd2807SJeff Garzik } 1600c6fd2807SJeff Garzik 1601c6fd2807SJeff Garzik /** 1602c6fd2807SJeff Garzik * ata_dev_read_id - Read ID data from the specified device 1603c6fd2807SJeff Garzik * @dev: target device 1604c6fd2807SJeff Garzik * @p_class: pointer to class of the target device (may be changed) 1605bff04647STejun Heo * @flags: ATA_READID_* flags 1606c6fd2807SJeff Garzik * @id: buffer to read IDENTIFY data into 1607c6fd2807SJeff Garzik * 1608c6fd2807SJeff Garzik * Read ID data from the specified device. ATA_CMD_ID_ATA is 1609c6fd2807SJeff Garzik * performed on ATA devices and ATA_CMD_ID_ATAPI on ATAPI 1610c6fd2807SJeff Garzik * devices. This function also issues ATA_CMD_INIT_DEV_PARAMS 1611c6fd2807SJeff Garzik * for pre-ATA4 drives. 1612c6fd2807SJeff Garzik * 1613c6fd2807SJeff Garzik * LOCKING: 1614c6fd2807SJeff Garzik * Kernel thread context (may sleep) 1615c6fd2807SJeff Garzik * 1616c6fd2807SJeff Garzik * RETURNS: 1617c6fd2807SJeff Garzik * 0 on success, -errno otherwise. 1618c6fd2807SJeff Garzik */ 1619c6fd2807SJeff Garzik int ata_dev_read_id(struct ata_device *dev, unsigned int *p_class, 1620bff04647STejun Heo unsigned int flags, u16 *id) 1621c6fd2807SJeff Garzik { 1622c6fd2807SJeff Garzik struct ata_port *ap = dev->ap; 1623c6fd2807SJeff Garzik unsigned int class = *p_class; 1624c6fd2807SJeff Garzik struct ata_taskfile tf; 1625c6fd2807SJeff Garzik unsigned int err_mask = 0; 1626c6fd2807SJeff Garzik const char *reason; 162754936f8bSTejun Heo int may_fallback = 1, tried_spinup = 0; 1628c6fd2807SJeff Garzik int rc; 1629c6fd2807SJeff Garzik 1630c6fd2807SJeff Garzik if (ata_msg_ctl(ap)) 163144877b4eSTejun Heo ata_dev_printk(dev, KERN_DEBUG, "%s: ENTER\n", __FUNCTION__); 1632c6fd2807SJeff Garzik 1633c6fd2807SJeff Garzik ata_dev_select(ap, dev->devno, 1, 1); /* select device 0/1 */ 1634c6fd2807SJeff Garzik retry: 1635c6fd2807SJeff Garzik ata_tf_init(dev, &tf); 1636c6fd2807SJeff Garzik 1637c6fd2807SJeff Garzik switch (class) { 1638c6fd2807SJeff Garzik case ATA_DEV_ATA: 1639c6fd2807SJeff Garzik tf.command = ATA_CMD_ID_ATA; 1640c6fd2807SJeff Garzik break; 1641c6fd2807SJeff Garzik case ATA_DEV_ATAPI: 1642c6fd2807SJeff Garzik tf.command = ATA_CMD_ID_ATAPI; 1643c6fd2807SJeff Garzik break; 1644c6fd2807SJeff Garzik default: 1645c6fd2807SJeff Garzik rc = -ENODEV; 1646c6fd2807SJeff Garzik reason = "unsupported class"; 1647c6fd2807SJeff Garzik goto err_out; 1648c6fd2807SJeff Garzik } 1649c6fd2807SJeff Garzik 1650c6fd2807SJeff Garzik tf.protocol = ATA_PROT_PIO; 165181afe893STejun Heo 165281afe893STejun Heo /* Some devices choke if TF registers contain garbage. Make 165381afe893STejun Heo * sure those are properly initialized. 165481afe893STejun Heo */ 165581afe893STejun Heo tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 165681afe893STejun Heo 165781afe893STejun Heo /* Device presence detection is unreliable on some 165881afe893STejun Heo * controllers. Always poll IDENTIFY if available. 165981afe893STejun Heo */ 166081afe893STejun Heo tf.flags |= ATA_TFLAG_POLLING; 1661c6fd2807SJeff Garzik 1662c6fd2807SJeff Garzik err_mask = ata_exec_internal(dev, &tf, NULL, DMA_FROM_DEVICE, 1663c6fd2807SJeff Garzik id, sizeof(id[0]) * ATA_ID_WORDS); 1664c6fd2807SJeff Garzik if (err_mask) { 1665800b3996STejun Heo if (err_mask & AC_ERR_NODEV_HINT) { 166655a8e2c8STejun Heo DPRINTK("ata%u.%d: NODEV after polling detection\n", 166744877b4eSTejun Heo ap->print_id, dev->devno); 166855a8e2c8STejun Heo return -ENOENT; 166955a8e2c8STejun Heo } 167055a8e2c8STejun Heo 167154936f8bSTejun Heo /* Device or controller might have reported the wrong 167254936f8bSTejun Heo * device class. Give a shot at the other IDENTIFY if 167354936f8bSTejun Heo * the current one is aborted by the device. 167454936f8bSTejun Heo */ 167554936f8bSTejun Heo if (may_fallback && 167654936f8bSTejun Heo (err_mask == AC_ERR_DEV) && (tf.feature & ATA_ABORTED)) { 167754936f8bSTejun Heo may_fallback = 0; 167854936f8bSTejun Heo 167954936f8bSTejun Heo if (class == ATA_DEV_ATA) 168054936f8bSTejun Heo class = ATA_DEV_ATAPI; 168154936f8bSTejun Heo else 168254936f8bSTejun Heo class = ATA_DEV_ATA; 168354936f8bSTejun Heo goto retry; 168454936f8bSTejun Heo } 168554936f8bSTejun Heo 1686c6fd2807SJeff Garzik rc = -EIO; 1687c6fd2807SJeff Garzik reason = "I/O error"; 1688c6fd2807SJeff Garzik goto err_out; 1689c6fd2807SJeff Garzik } 1690c6fd2807SJeff Garzik 169154936f8bSTejun Heo /* Falling back doesn't make sense if ID data was read 169254936f8bSTejun Heo * successfully at least once. 169354936f8bSTejun Heo */ 169454936f8bSTejun Heo may_fallback = 0; 169554936f8bSTejun Heo 1696c6fd2807SJeff Garzik swap_buf_le16(id, ATA_ID_WORDS); 1697c6fd2807SJeff Garzik 1698c6fd2807SJeff Garzik /* sanity check */ 1699c6fd2807SJeff Garzik rc = -EINVAL; 17006070068bSAlan Cox reason = "device reports invalid type"; 17014a3381feSJeff Garzik 17024a3381feSJeff Garzik if (class == ATA_DEV_ATA) { 17034a3381feSJeff Garzik if (!ata_id_is_ata(id) && !ata_id_is_cfa(id)) 17044a3381feSJeff Garzik goto err_out; 17054a3381feSJeff Garzik } else { 17064a3381feSJeff Garzik if (ata_id_is_ata(id)) 1707c6fd2807SJeff Garzik goto err_out; 1708c6fd2807SJeff Garzik } 1709c6fd2807SJeff Garzik 1710169439c2SMark Lord if (!tried_spinup && (id[2] == 0x37c8 || id[2] == 0x738c)) { 1711169439c2SMark Lord tried_spinup = 1; 1712169439c2SMark Lord /* 1713169439c2SMark Lord * Drive powered-up in standby mode, and requires a specific 1714169439c2SMark Lord * SET_FEATURES spin-up subcommand before it will accept 1715169439c2SMark Lord * anything other than the original IDENTIFY command. 1716169439c2SMark Lord */ 1717169439c2SMark Lord ata_tf_init(dev, &tf); 1718169439c2SMark Lord tf.command = ATA_CMD_SET_FEATURES; 1719169439c2SMark Lord tf.feature = SETFEATURES_SPINUP; 1720169439c2SMark Lord tf.protocol = ATA_PROT_NODATA; 1721169439c2SMark Lord tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 1722169439c2SMark Lord err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0); 1723169439c2SMark Lord if (err_mask) { 1724169439c2SMark Lord rc = -EIO; 1725169439c2SMark Lord reason = "SPINUP failed"; 1726169439c2SMark Lord goto err_out; 1727169439c2SMark Lord } 1728169439c2SMark Lord /* 1729169439c2SMark Lord * If the drive initially returned incomplete IDENTIFY info, 1730169439c2SMark Lord * we now must reissue the IDENTIFY command. 1731169439c2SMark Lord */ 1732169439c2SMark Lord if (id[2] == 0x37c8) 1733169439c2SMark Lord goto retry; 1734169439c2SMark Lord } 1735169439c2SMark Lord 1736bff04647STejun Heo if ((flags & ATA_READID_POSTRESET) && class == ATA_DEV_ATA) { 1737c6fd2807SJeff Garzik /* 1738c6fd2807SJeff Garzik * The exact sequence expected by certain pre-ATA4 drives is: 1739c6fd2807SJeff Garzik * SRST RESET 1740c6fd2807SJeff Garzik * IDENTIFY 1741c6fd2807SJeff Garzik * INITIALIZE DEVICE PARAMETERS 1742c6fd2807SJeff Garzik * anything else.. 1743c6fd2807SJeff Garzik * Some drives were very specific about that exact sequence. 1744c6fd2807SJeff Garzik */ 1745c6fd2807SJeff Garzik if (ata_id_major_version(id) < 4 || !ata_id_has_lba(id)) { 1746c6fd2807SJeff Garzik err_mask = ata_dev_init_params(dev, id[3], id[6]); 1747c6fd2807SJeff Garzik if (err_mask) { 1748c6fd2807SJeff Garzik rc = -EIO; 1749c6fd2807SJeff Garzik reason = "INIT_DEV_PARAMS failed"; 1750c6fd2807SJeff Garzik goto err_out; 1751c6fd2807SJeff Garzik } 1752c6fd2807SJeff Garzik 1753c6fd2807SJeff Garzik /* current CHS translation info (id[53-58]) might be 1754c6fd2807SJeff Garzik * changed. reread the identify device info. 1755c6fd2807SJeff Garzik */ 1756bff04647STejun Heo flags &= ~ATA_READID_POSTRESET; 1757c6fd2807SJeff Garzik goto retry; 1758c6fd2807SJeff Garzik } 1759c6fd2807SJeff Garzik } 1760c6fd2807SJeff Garzik 1761c6fd2807SJeff Garzik *p_class = class; 1762c6fd2807SJeff Garzik 1763c6fd2807SJeff Garzik return 0; 1764c6fd2807SJeff Garzik 1765c6fd2807SJeff Garzik err_out: 1766c6fd2807SJeff Garzik if (ata_msg_warn(ap)) 1767c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_WARNING, "failed to IDENTIFY " 1768c6fd2807SJeff Garzik "(%s, err_mask=0x%x)\n", reason, err_mask); 1769c6fd2807SJeff Garzik return rc; 1770c6fd2807SJeff Garzik } 1771c6fd2807SJeff Garzik 1772c6fd2807SJeff Garzik static inline u8 ata_dev_knobble(struct ata_device *dev) 1773c6fd2807SJeff Garzik { 1774c6fd2807SJeff Garzik return ((dev->ap->cbl == ATA_CBL_SATA) && (!ata_id_is_sata(dev->id))); 1775c6fd2807SJeff Garzik } 1776c6fd2807SJeff Garzik 1777c6fd2807SJeff Garzik static void ata_dev_config_ncq(struct ata_device *dev, 1778c6fd2807SJeff Garzik char *desc, size_t desc_sz) 1779c6fd2807SJeff Garzik { 1780c6fd2807SJeff Garzik struct ata_port *ap = dev->ap; 1781c6fd2807SJeff Garzik int hdepth = 0, ddepth = ata_id_queue_depth(dev->id); 1782c6fd2807SJeff Garzik 1783c6fd2807SJeff Garzik if (!ata_id_has_ncq(dev->id)) { 1784c6fd2807SJeff Garzik desc[0] = '\0'; 1785c6fd2807SJeff Garzik return; 1786c6fd2807SJeff Garzik } 17876919a0a6SAlan Cox if (ata_device_blacklisted(dev) & ATA_HORKAGE_NONCQ) { 17886919a0a6SAlan Cox snprintf(desc, desc_sz, "NCQ (not used)"); 17896919a0a6SAlan Cox return; 17906919a0a6SAlan Cox } 1791c6fd2807SJeff Garzik if (ap->flags & ATA_FLAG_NCQ) { 1792cca3974eSJeff Garzik hdepth = min(ap->scsi_host->can_queue, ATA_MAX_QUEUE - 1); 1793c6fd2807SJeff Garzik dev->flags |= ATA_DFLAG_NCQ; 1794c6fd2807SJeff Garzik } 1795c6fd2807SJeff Garzik 1796c6fd2807SJeff Garzik if (hdepth >= ddepth) 1797c6fd2807SJeff Garzik snprintf(desc, desc_sz, "NCQ (depth %d)", ddepth); 1798c6fd2807SJeff Garzik else 1799c6fd2807SJeff Garzik snprintf(desc, desc_sz, "NCQ (depth %d/%d)", hdepth, ddepth); 1800c6fd2807SJeff Garzik } 1801c6fd2807SJeff Garzik 1802c6fd2807SJeff Garzik /** 1803c6fd2807SJeff Garzik * ata_dev_configure - Configure the specified ATA/ATAPI device 1804c6fd2807SJeff Garzik * @dev: Target device to configure 1805c6fd2807SJeff Garzik * 1806c6fd2807SJeff Garzik * Configure @dev according to @dev->id. Generic and low-level 1807c6fd2807SJeff Garzik * driver specific fixups are also applied. 1808c6fd2807SJeff Garzik * 1809c6fd2807SJeff Garzik * LOCKING: 1810c6fd2807SJeff Garzik * Kernel thread context (may sleep) 1811c6fd2807SJeff Garzik * 1812c6fd2807SJeff Garzik * RETURNS: 1813c6fd2807SJeff Garzik * 0 on success, -errno otherwise 1814c6fd2807SJeff Garzik */ 1815efdaedc4STejun Heo int ata_dev_configure(struct ata_device *dev) 1816c6fd2807SJeff Garzik { 1817c6fd2807SJeff Garzik struct ata_port *ap = dev->ap; 18186746544cSTejun Heo struct ata_eh_context *ehc = &ap->eh_context; 18196746544cSTejun Heo int print_info = ehc->i.flags & ATA_EHI_PRINTINFO; 1820c6fd2807SJeff Garzik const u16 *id = dev->id; 1821c6fd2807SJeff Garzik unsigned int xfer_mask; 1822b352e57dSAlan Cox char revbuf[7]; /* XYZ-99\0 */ 18233f64f565SEric D. Mudama char fwrevbuf[ATA_ID_FW_REV_LEN+1]; 18243f64f565SEric D. Mudama char modelbuf[ATA_ID_PROD_LEN+1]; 1825c6fd2807SJeff Garzik int rc; 1826c6fd2807SJeff Garzik 1827c6fd2807SJeff Garzik if (!ata_dev_enabled(dev) && ata_msg_info(ap)) { 182844877b4eSTejun Heo ata_dev_printk(dev, KERN_INFO, "%s: ENTER/EXIT -- nodev\n", 182944877b4eSTejun Heo __FUNCTION__); 1830c6fd2807SJeff Garzik return 0; 1831c6fd2807SJeff Garzik } 1832c6fd2807SJeff Garzik 1833c6fd2807SJeff Garzik if (ata_msg_probe(ap)) 183444877b4eSTejun Heo ata_dev_printk(dev, KERN_DEBUG, "%s: ENTER\n", __FUNCTION__); 1835c6fd2807SJeff Garzik 18366746544cSTejun Heo /* let ACPI work its magic */ 18376746544cSTejun Heo rc = ata_acpi_on_devcfg(dev); 18386746544cSTejun Heo if (rc) 18396746544cSTejun Heo return rc; 184008573a86SKristen Carlson Accardi 1841c6fd2807SJeff Garzik /* print device capabilities */ 1842c6fd2807SJeff Garzik if (ata_msg_probe(ap)) 1843c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_DEBUG, 1844c6fd2807SJeff Garzik "%s: cfg 49:%04x 82:%04x 83:%04x 84:%04x " 1845c6fd2807SJeff Garzik "85:%04x 86:%04x 87:%04x 88:%04x\n", 1846c6fd2807SJeff Garzik __FUNCTION__, 1847c6fd2807SJeff Garzik id[49], id[82], id[83], id[84], 1848c6fd2807SJeff Garzik id[85], id[86], id[87], id[88]); 1849c6fd2807SJeff Garzik 1850c6fd2807SJeff Garzik /* initialize to-be-configured parameters */ 1851c6fd2807SJeff Garzik dev->flags &= ~ATA_DFLAG_CFG_MASK; 1852c6fd2807SJeff Garzik dev->max_sectors = 0; 1853c6fd2807SJeff Garzik dev->cdb_len = 0; 1854c6fd2807SJeff Garzik dev->n_sectors = 0; 1855c6fd2807SJeff Garzik dev->cylinders = 0; 1856c6fd2807SJeff Garzik dev->heads = 0; 1857c6fd2807SJeff Garzik dev->sectors = 0; 1858c6fd2807SJeff Garzik 1859c6fd2807SJeff Garzik /* 1860c6fd2807SJeff Garzik * common ATA, ATAPI feature tests 1861c6fd2807SJeff Garzik */ 1862c6fd2807SJeff Garzik 1863c6fd2807SJeff Garzik /* find max transfer mode; for printk only */ 1864c6fd2807SJeff Garzik xfer_mask = ata_id_xfermask(id); 1865c6fd2807SJeff Garzik 1866c6fd2807SJeff Garzik if (ata_msg_probe(ap)) 1867c6fd2807SJeff Garzik ata_dump_id(id); 1868c6fd2807SJeff Garzik 1869ef143d57SAlbert Lee /* SCSI only uses 4-char revisions, dump full 8 chars from ATA */ 1870ef143d57SAlbert Lee ata_id_c_string(dev->id, fwrevbuf, ATA_ID_FW_REV, 1871ef143d57SAlbert Lee sizeof(fwrevbuf)); 1872ef143d57SAlbert Lee 1873ef143d57SAlbert Lee ata_id_c_string(dev->id, modelbuf, ATA_ID_PROD, 1874ef143d57SAlbert Lee sizeof(modelbuf)); 1875ef143d57SAlbert Lee 1876c6fd2807SJeff Garzik /* ATA-specific feature tests */ 1877c6fd2807SJeff Garzik if (dev->class == ATA_DEV_ATA) { 1878b352e57dSAlan Cox if (ata_id_is_cfa(id)) { 1879b352e57dSAlan Cox if (id[162] & 1) /* CPRM may make this media unusable */ 188044877b4eSTejun Heo ata_dev_printk(dev, KERN_WARNING, 188144877b4eSTejun Heo "supports DRM functions and may " 188244877b4eSTejun Heo "not be fully accessable.\n"); 1883b352e57dSAlan Cox snprintf(revbuf, 7, "CFA"); 1884b352e57dSAlan Cox } 1885b352e57dSAlan Cox else 1886b352e57dSAlan Cox snprintf(revbuf, 7, "ATA-%d", ata_id_major_version(id)); 1887b352e57dSAlan Cox 1888c6fd2807SJeff Garzik dev->n_sectors = ata_id_n_sectors(id); 1889c6fd2807SJeff Garzik 18903f64f565SEric D. Mudama if (dev->id[59] & 0x100) 18913f64f565SEric D. Mudama dev->multi_count = dev->id[59] & 0xff; 18923f64f565SEric D. Mudama 1893c6fd2807SJeff Garzik if (ata_id_has_lba(id)) { 1894c6fd2807SJeff Garzik const char *lba_desc; 1895c6fd2807SJeff Garzik char ncq_desc[20]; 1896c6fd2807SJeff Garzik 1897c6fd2807SJeff Garzik lba_desc = "LBA"; 1898c6fd2807SJeff Garzik dev->flags |= ATA_DFLAG_LBA; 1899c6fd2807SJeff Garzik if (ata_id_has_lba48(id)) { 1900c6fd2807SJeff Garzik dev->flags |= ATA_DFLAG_LBA48; 1901c6fd2807SJeff Garzik lba_desc = "LBA48"; 19026fc49adbSTejun Heo 19036fc49adbSTejun Heo if (dev->n_sectors >= (1UL << 28) && 19046fc49adbSTejun Heo ata_id_has_flush_ext(id)) 19056fc49adbSTejun Heo dev->flags |= ATA_DFLAG_FLUSH_EXT; 1906c6fd2807SJeff Garzik } 1907c6fd2807SJeff Garzik 19081e999736SAlan Cox if (ata_id_hpa_enabled(dev->id)) 19091e999736SAlan Cox dev->n_sectors = ata_hpa_resize(dev); 19101e999736SAlan Cox 1911c6fd2807SJeff Garzik /* config NCQ */ 1912c6fd2807SJeff Garzik ata_dev_config_ncq(dev, ncq_desc, sizeof(ncq_desc)); 1913c6fd2807SJeff Garzik 1914c6fd2807SJeff Garzik /* print device info to dmesg */ 19153f64f565SEric D. Mudama if (ata_msg_drv(ap) && print_info) { 19163f64f565SEric D. Mudama ata_dev_printk(dev, KERN_INFO, 19173f64f565SEric D. Mudama "%s: %s, %s, max %s\n", 19183f64f565SEric D. Mudama revbuf, modelbuf, fwrevbuf, 19193f64f565SEric D. Mudama ata_mode_string(xfer_mask)); 19203f64f565SEric D. Mudama ata_dev_printk(dev, KERN_INFO, 19213f64f565SEric D. Mudama "%Lu sectors, multi %u: %s %s\n", 1922c6fd2807SJeff Garzik (unsigned long long)dev->n_sectors, 19233f64f565SEric D. Mudama dev->multi_count, lba_desc, ncq_desc); 19243f64f565SEric D. Mudama } 1925c6fd2807SJeff Garzik } else { 1926c6fd2807SJeff Garzik /* CHS */ 1927c6fd2807SJeff Garzik 1928c6fd2807SJeff Garzik /* Default translation */ 1929c6fd2807SJeff Garzik dev->cylinders = id[1]; 1930c6fd2807SJeff Garzik dev->heads = id[3]; 1931c6fd2807SJeff Garzik dev->sectors = id[6]; 1932c6fd2807SJeff Garzik 1933c6fd2807SJeff Garzik if (ata_id_current_chs_valid(id)) { 1934c6fd2807SJeff Garzik /* Current CHS translation is valid. */ 1935c6fd2807SJeff Garzik dev->cylinders = id[54]; 1936c6fd2807SJeff Garzik dev->heads = id[55]; 1937c6fd2807SJeff Garzik dev->sectors = id[56]; 1938c6fd2807SJeff Garzik } 1939c6fd2807SJeff Garzik 1940c6fd2807SJeff Garzik /* print device info to dmesg */ 19413f64f565SEric D. Mudama if (ata_msg_drv(ap) && print_info) { 1942c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_INFO, 19433f64f565SEric D. Mudama "%s: %s, %s, max %s\n", 19443f64f565SEric D. Mudama revbuf, modelbuf, fwrevbuf, 19453f64f565SEric D. Mudama ata_mode_string(xfer_mask)); 19463f64f565SEric D. Mudama ata_dev_printk(dev, KERN_INFO, 19473f64f565SEric D. Mudama "%Lu sectors, multi %u, CHS %u/%u/%u\n", 19483f64f565SEric D. Mudama (unsigned long long)dev->n_sectors, 19493f64f565SEric D. Mudama dev->multi_count, dev->cylinders, 19503f64f565SEric D. Mudama dev->heads, dev->sectors); 19513f64f565SEric D. Mudama } 1952c6fd2807SJeff Garzik } 1953c6fd2807SJeff Garzik 1954c6fd2807SJeff Garzik dev->cdb_len = 16; 1955c6fd2807SJeff Garzik } 1956c6fd2807SJeff Garzik 1957c6fd2807SJeff Garzik /* ATAPI-specific feature tests */ 1958c6fd2807SJeff Garzik else if (dev->class == ATA_DEV_ATAPI) { 1959c6fd2807SJeff Garzik char *cdb_intr_string = ""; 1960c6fd2807SJeff Garzik 1961c6fd2807SJeff Garzik rc = atapi_cdb_len(id); 1962c6fd2807SJeff Garzik if ((rc < 12) || (rc > ATAPI_CDB_LEN)) { 1963c6fd2807SJeff Garzik if (ata_msg_warn(ap)) 1964c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_WARNING, 1965c6fd2807SJeff Garzik "unsupported CDB len\n"); 1966c6fd2807SJeff Garzik rc = -EINVAL; 1967c6fd2807SJeff Garzik goto err_out_nosup; 1968c6fd2807SJeff Garzik } 1969c6fd2807SJeff Garzik dev->cdb_len = (unsigned int) rc; 1970c6fd2807SJeff Garzik 1971c6fd2807SJeff Garzik if (ata_id_cdb_intr(dev->id)) { 1972c6fd2807SJeff Garzik dev->flags |= ATA_DFLAG_CDB_INTR; 1973c6fd2807SJeff Garzik cdb_intr_string = ", CDB intr"; 1974c6fd2807SJeff Garzik } 1975c6fd2807SJeff Garzik 1976c6fd2807SJeff Garzik /* print device info to dmesg */ 1977c6fd2807SJeff Garzik if (ata_msg_drv(ap) && print_info) 1978ef143d57SAlbert Lee ata_dev_printk(dev, KERN_INFO, 1979ef143d57SAlbert Lee "ATAPI: %s, %s, max %s%s\n", 1980ef143d57SAlbert Lee modelbuf, fwrevbuf, 1981c6fd2807SJeff Garzik ata_mode_string(xfer_mask), 1982c6fd2807SJeff Garzik cdb_intr_string); 1983c6fd2807SJeff Garzik } 1984c6fd2807SJeff Garzik 1985914ed354STejun Heo /* determine max_sectors */ 1986914ed354STejun Heo dev->max_sectors = ATA_MAX_SECTORS; 1987914ed354STejun Heo if (dev->flags & ATA_DFLAG_LBA48) 1988914ed354STejun Heo dev->max_sectors = ATA_MAX_SECTORS_LBA48; 1989914ed354STejun Heo 199093590859SAlan Cox if (dev->horkage & ATA_HORKAGE_DIAGNOSTIC) { 199193590859SAlan Cox /* Let the user know. We don't want to disallow opens for 199293590859SAlan Cox rescue purposes, or in case the vendor is just a blithering 199393590859SAlan Cox idiot */ 199493590859SAlan Cox if (print_info) { 199593590859SAlan Cox ata_dev_printk(dev, KERN_WARNING, 199693590859SAlan Cox "Drive reports diagnostics failure. This may indicate a drive\n"); 199793590859SAlan Cox ata_dev_printk(dev, KERN_WARNING, 199893590859SAlan Cox "fault or invalid emulation. Contact drive vendor for information.\n"); 199993590859SAlan Cox } 200093590859SAlan Cox } 200193590859SAlan Cox 2002c6fd2807SJeff Garzik /* limit bridge transfers to udma5, 200 sectors */ 2003c6fd2807SJeff Garzik if (ata_dev_knobble(dev)) { 2004c6fd2807SJeff Garzik if (ata_msg_drv(ap) && print_info) 2005c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_INFO, 2006c6fd2807SJeff Garzik "applying bridge limits\n"); 2007c6fd2807SJeff Garzik dev->udma_mask &= ATA_UDMA5; 2008c6fd2807SJeff Garzik dev->max_sectors = ATA_MAX_SECTORS; 2009c6fd2807SJeff Garzik } 2010c6fd2807SJeff Garzik 201118d6e9d5SAlbert Lee if (ata_device_blacklisted(dev) & ATA_HORKAGE_MAX_SEC_128) 201203ec52deSTejun Heo dev->max_sectors = min_t(unsigned int, ATA_MAX_SECTORS_128, 201303ec52deSTejun Heo dev->max_sectors); 201418d6e9d5SAlbert Lee 2015c6fd2807SJeff Garzik if (ap->ops->dev_config) 2016cd0d3bbcSAlan ap->ops->dev_config(dev); 2017c6fd2807SJeff Garzik 2018c6fd2807SJeff Garzik if (ata_msg_probe(ap)) 2019c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_DEBUG, "%s: EXIT, drv_stat = 0x%x\n", 2020c6fd2807SJeff Garzik __FUNCTION__, ata_chk_status(ap)); 2021c6fd2807SJeff Garzik return 0; 2022c6fd2807SJeff Garzik 2023c6fd2807SJeff Garzik err_out_nosup: 2024c6fd2807SJeff Garzik if (ata_msg_probe(ap)) 2025c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_DEBUG, 2026c6fd2807SJeff Garzik "%s: EXIT, err\n", __FUNCTION__); 2027c6fd2807SJeff Garzik return rc; 2028c6fd2807SJeff Garzik } 2029c6fd2807SJeff Garzik 2030c6fd2807SJeff Garzik /** 20312e41e8e6SAlan Cox * ata_cable_40wire - return 40 wire cable type 2032be0d18dfSAlan Cox * @ap: port 2033be0d18dfSAlan Cox * 20342e41e8e6SAlan Cox * Helper method for drivers which want to hardwire 40 wire cable 2035be0d18dfSAlan Cox * detection. 2036be0d18dfSAlan Cox */ 2037be0d18dfSAlan Cox 2038be0d18dfSAlan Cox int ata_cable_40wire(struct ata_port *ap) 2039be0d18dfSAlan Cox { 2040be0d18dfSAlan Cox return ATA_CBL_PATA40; 2041be0d18dfSAlan Cox } 2042be0d18dfSAlan Cox 2043be0d18dfSAlan Cox /** 20442e41e8e6SAlan Cox * ata_cable_80wire - return 80 wire cable type 2045be0d18dfSAlan Cox * @ap: port 2046be0d18dfSAlan Cox * 20472e41e8e6SAlan Cox * Helper method for drivers which want to hardwire 80 wire cable 2048be0d18dfSAlan Cox * detection. 2049be0d18dfSAlan Cox */ 2050be0d18dfSAlan Cox 2051be0d18dfSAlan Cox int ata_cable_80wire(struct ata_port *ap) 2052be0d18dfSAlan Cox { 2053be0d18dfSAlan Cox return ATA_CBL_PATA80; 2054be0d18dfSAlan Cox } 2055be0d18dfSAlan Cox 2056be0d18dfSAlan Cox /** 2057be0d18dfSAlan Cox * ata_cable_unknown - return unknown PATA cable. 2058be0d18dfSAlan Cox * @ap: port 2059be0d18dfSAlan Cox * 2060be0d18dfSAlan Cox * Helper method for drivers which have no PATA cable detection. 2061be0d18dfSAlan Cox */ 2062be0d18dfSAlan Cox 2063be0d18dfSAlan Cox int ata_cable_unknown(struct ata_port *ap) 2064be0d18dfSAlan Cox { 2065be0d18dfSAlan Cox return ATA_CBL_PATA_UNK; 2066be0d18dfSAlan Cox } 2067be0d18dfSAlan Cox 2068be0d18dfSAlan Cox /** 2069be0d18dfSAlan Cox * ata_cable_sata - return SATA cable type 2070be0d18dfSAlan Cox * @ap: port 2071be0d18dfSAlan Cox * 2072be0d18dfSAlan Cox * Helper method for drivers which have SATA cables 2073be0d18dfSAlan Cox */ 2074be0d18dfSAlan Cox 2075be0d18dfSAlan Cox int ata_cable_sata(struct ata_port *ap) 2076be0d18dfSAlan Cox { 2077be0d18dfSAlan Cox return ATA_CBL_SATA; 2078be0d18dfSAlan Cox } 2079be0d18dfSAlan Cox 2080be0d18dfSAlan Cox /** 2081c6fd2807SJeff Garzik * ata_bus_probe - Reset and probe ATA bus 2082c6fd2807SJeff Garzik * @ap: Bus to probe 2083c6fd2807SJeff Garzik * 2084c6fd2807SJeff Garzik * Master ATA bus probing function. Initiates a hardware-dependent 2085c6fd2807SJeff Garzik * bus reset, then attempts to identify any devices found on 2086c6fd2807SJeff Garzik * the bus. 2087c6fd2807SJeff Garzik * 2088c6fd2807SJeff Garzik * LOCKING: 2089c6fd2807SJeff Garzik * PCI/etc. bus probe sem. 2090c6fd2807SJeff Garzik * 2091c6fd2807SJeff Garzik * RETURNS: 2092c6fd2807SJeff Garzik * Zero on success, negative errno otherwise. 2093c6fd2807SJeff Garzik */ 2094c6fd2807SJeff Garzik 2095c6fd2807SJeff Garzik int ata_bus_probe(struct ata_port *ap) 2096c6fd2807SJeff Garzik { 2097c6fd2807SJeff Garzik unsigned int classes[ATA_MAX_DEVICES]; 2098c6fd2807SJeff Garzik int tries[ATA_MAX_DEVICES]; 20994ae72a1eSTejun Heo int i, rc; 2100c6fd2807SJeff Garzik struct ata_device *dev; 2101c6fd2807SJeff Garzik 2102c6fd2807SJeff Garzik ata_port_probe(ap); 2103c6fd2807SJeff Garzik 2104c6fd2807SJeff Garzik for (i = 0; i < ATA_MAX_DEVICES; i++) 2105c6fd2807SJeff Garzik tries[i] = ATA_PROBE_MAX_TRIES; 2106c6fd2807SJeff Garzik 2107c6fd2807SJeff Garzik retry: 2108c6fd2807SJeff Garzik /* reset and determine device classes */ 2109c6fd2807SJeff Garzik ap->ops->phy_reset(ap); 2110c6fd2807SJeff Garzik 2111c6fd2807SJeff Garzik for (i = 0; i < ATA_MAX_DEVICES; i++) { 2112c6fd2807SJeff Garzik dev = &ap->device[i]; 2113c6fd2807SJeff Garzik 2114c6fd2807SJeff Garzik if (!(ap->flags & ATA_FLAG_DISABLED) && 2115c6fd2807SJeff Garzik dev->class != ATA_DEV_UNKNOWN) 2116c6fd2807SJeff Garzik classes[dev->devno] = dev->class; 2117c6fd2807SJeff Garzik else 2118c6fd2807SJeff Garzik classes[dev->devno] = ATA_DEV_NONE; 2119c6fd2807SJeff Garzik 2120c6fd2807SJeff Garzik dev->class = ATA_DEV_UNKNOWN; 2121c6fd2807SJeff Garzik } 2122c6fd2807SJeff Garzik 2123c6fd2807SJeff Garzik ata_port_probe(ap); 2124c6fd2807SJeff Garzik 2125c6fd2807SJeff Garzik /* after the reset the device state is PIO 0 and the controller 2126c6fd2807SJeff Garzik state is undefined. Record the mode */ 2127c6fd2807SJeff Garzik 2128c6fd2807SJeff Garzik for (i = 0; i < ATA_MAX_DEVICES; i++) 2129c6fd2807SJeff Garzik ap->device[i].pio_mode = XFER_PIO_0; 2130c6fd2807SJeff Garzik 2131f31f0cc2SJeff Garzik /* read IDENTIFY page and configure devices. We have to do the identify 2132f31f0cc2SJeff Garzik specific sequence bass-ackwards so that PDIAG- is released by 2133f31f0cc2SJeff Garzik the slave device */ 2134f31f0cc2SJeff Garzik 2135f31f0cc2SJeff Garzik for (i = ATA_MAX_DEVICES - 1; i >= 0; i--) { 2136c6fd2807SJeff Garzik dev = &ap->device[i]; 2137c6fd2807SJeff Garzik 2138c6fd2807SJeff Garzik if (tries[i]) 2139c6fd2807SJeff Garzik dev->class = classes[i]; 2140c6fd2807SJeff Garzik 2141c6fd2807SJeff Garzik if (!ata_dev_enabled(dev)) 2142c6fd2807SJeff Garzik continue; 2143c6fd2807SJeff Garzik 2144bff04647STejun Heo rc = ata_dev_read_id(dev, &dev->class, ATA_READID_POSTRESET, 2145bff04647STejun Heo dev->id); 2146c6fd2807SJeff Garzik if (rc) 2147c6fd2807SJeff Garzik goto fail; 2148f31f0cc2SJeff Garzik } 2149f31f0cc2SJeff Garzik 2150be0d18dfSAlan Cox /* Now ask for the cable type as PDIAG- should have been released */ 2151be0d18dfSAlan Cox if (ap->ops->cable_detect) 2152be0d18dfSAlan Cox ap->cbl = ap->ops->cable_detect(ap); 2153be0d18dfSAlan Cox 2154f31f0cc2SJeff Garzik /* After the identify sequence we can now set up the devices. We do 2155f31f0cc2SJeff Garzik this in the normal order so that the user doesn't get confused */ 2156f31f0cc2SJeff Garzik 2157f31f0cc2SJeff Garzik for(i = 0; i < ATA_MAX_DEVICES; i++) { 2158f31f0cc2SJeff Garzik dev = &ap->device[i]; 2159f31f0cc2SJeff Garzik if (!ata_dev_enabled(dev)) 2160f31f0cc2SJeff Garzik continue; 2161c6fd2807SJeff Garzik 2162efdaedc4STejun Heo ap->eh_context.i.flags |= ATA_EHI_PRINTINFO; 2163efdaedc4STejun Heo rc = ata_dev_configure(dev); 2164efdaedc4STejun Heo ap->eh_context.i.flags &= ~ATA_EHI_PRINTINFO; 2165c6fd2807SJeff Garzik if (rc) 2166c6fd2807SJeff Garzik goto fail; 2167c6fd2807SJeff Garzik } 2168c6fd2807SJeff Garzik 2169c6fd2807SJeff Garzik /* configure transfer mode */ 2170c6fd2807SJeff Garzik rc = ata_set_mode(ap, &dev); 21714ae72a1eSTejun Heo if (rc) 2172c6fd2807SJeff Garzik goto fail; 2173c6fd2807SJeff Garzik 2174c6fd2807SJeff Garzik for (i = 0; i < ATA_MAX_DEVICES; i++) 2175c6fd2807SJeff Garzik if (ata_dev_enabled(&ap->device[i])) 2176c6fd2807SJeff Garzik return 0; 2177c6fd2807SJeff Garzik 2178c6fd2807SJeff Garzik /* no device present, disable port */ 2179c6fd2807SJeff Garzik ata_port_disable(ap); 2180c6fd2807SJeff Garzik ap->ops->port_disable(ap); 2181c6fd2807SJeff Garzik return -ENODEV; 2182c6fd2807SJeff Garzik 2183c6fd2807SJeff Garzik fail: 21844ae72a1eSTejun Heo tries[dev->devno]--; 21854ae72a1eSTejun Heo 2186c6fd2807SJeff Garzik switch (rc) { 2187c6fd2807SJeff Garzik case -EINVAL: 21884ae72a1eSTejun Heo /* eeek, something went very wrong, give up */ 2189c6fd2807SJeff Garzik tries[dev->devno] = 0; 2190c6fd2807SJeff Garzik break; 21914ae72a1eSTejun Heo 21924ae72a1eSTejun Heo case -ENODEV: 21934ae72a1eSTejun Heo /* give it just one more chance */ 21944ae72a1eSTejun Heo tries[dev->devno] = min(tries[dev->devno], 1); 2195c6fd2807SJeff Garzik case -EIO: 21964ae72a1eSTejun Heo if (tries[dev->devno] == 1) { 21974ae72a1eSTejun Heo /* This is the last chance, better to slow 21984ae72a1eSTejun Heo * down than lose it. 21994ae72a1eSTejun Heo */ 2200c6fd2807SJeff Garzik sata_down_spd_limit(ap); 22014ae72a1eSTejun Heo ata_down_xfermask_limit(dev, ATA_DNXFER_PIO); 22024ae72a1eSTejun Heo } 2203c6fd2807SJeff Garzik } 2204c6fd2807SJeff Garzik 22054ae72a1eSTejun Heo if (!tries[dev->devno]) 2206c6fd2807SJeff Garzik ata_dev_disable(dev); 2207c6fd2807SJeff Garzik 2208c6fd2807SJeff Garzik goto retry; 2209c6fd2807SJeff Garzik } 2210c6fd2807SJeff Garzik 2211c6fd2807SJeff Garzik /** 2212c6fd2807SJeff Garzik * ata_port_probe - Mark port as enabled 2213c6fd2807SJeff Garzik * @ap: Port for which we indicate enablement 2214c6fd2807SJeff Garzik * 2215c6fd2807SJeff Garzik * Modify @ap data structure such that the system 2216c6fd2807SJeff Garzik * thinks that the entire port is enabled. 2217c6fd2807SJeff Garzik * 2218cca3974eSJeff Garzik * LOCKING: host lock, or some other form of 2219c6fd2807SJeff Garzik * serialization. 2220c6fd2807SJeff Garzik */ 2221c6fd2807SJeff Garzik 2222c6fd2807SJeff Garzik void ata_port_probe(struct ata_port *ap) 2223c6fd2807SJeff Garzik { 2224c6fd2807SJeff Garzik ap->flags &= ~ATA_FLAG_DISABLED; 2225c6fd2807SJeff Garzik } 2226c6fd2807SJeff Garzik 2227c6fd2807SJeff Garzik /** 2228c6fd2807SJeff Garzik * sata_print_link_status - Print SATA link status 2229c6fd2807SJeff Garzik * @ap: SATA port to printk link status about 2230c6fd2807SJeff Garzik * 2231c6fd2807SJeff Garzik * This function prints link speed and status of a SATA link. 2232c6fd2807SJeff Garzik * 2233c6fd2807SJeff Garzik * LOCKING: 2234c6fd2807SJeff Garzik * None. 2235c6fd2807SJeff Garzik */ 223643727fbcSJeff Garzik void sata_print_link_status(struct ata_port *ap) 2237c6fd2807SJeff Garzik { 2238c6fd2807SJeff Garzik u32 sstatus, scontrol, tmp; 2239c6fd2807SJeff Garzik 2240c6fd2807SJeff Garzik if (sata_scr_read(ap, SCR_STATUS, &sstatus)) 2241c6fd2807SJeff Garzik return; 2242c6fd2807SJeff Garzik sata_scr_read(ap, SCR_CONTROL, &scontrol); 2243c6fd2807SJeff Garzik 2244c6fd2807SJeff Garzik if (ata_port_online(ap)) { 2245c6fd2807SJeff Garzik tmp = (sstatus >> 4) & 0xf; 2246c6fd2807SJeff Garzik ata_port_printk(ap, KERN_INFO, 2247c6fd2807SJeff Garzik "SATA link up %s (SStatus %X SControl %X)\n", 2248c6fd2807SJeff Garzik sata_spd_string(tmp), sstatus, scontrol); 2249c6fd2807SJeff Garzik } else { 2250c6fd2807SJeff Garzik ata_port_printk(ap, KERN_INFO, 2251c6fd2807SJeff Garzik "SATA link down (SStatus %X SControl %X)\n", 2252c6fd2807SJeff Garzik sstatus, scontrol); 2253c6fd2807SJeff Garzik } 2254c6fd2807SJeff Garzik } 2255c6fd2807SJeff Garzik 2256c6fd2807SJeff Garzik /** 2257c6fd2807SJeff Garzik * __sata_phy_reset - Wake/reset a low-level SATA PHY 2258c6fd2807SJeff Garzik * @ap: SATA port associated with target SATA PHY. 2259c6fd2807SJeff Garzik * 2260c6fd2807SJeff Garzik * This function issues commands to standard SATA Sxxx 2261c6fd2807SJeff Garzik * PHY registers, to wake up the phy (and device), and 2262c6fd2807SJeff Garzik * clear any reset condition. 2263c6fd2807SJeff Garzik * 2264c6fd2807SJeff Garzik * LOCKING: 2265c6fd2807SJeff Garzik * PCI/etc. bus probe sem. 2266c6fd2807SJeff Garzik * 2267c6fd2807SJeff Garzik */ 2268c6fd2807SJeff Garzik void __sata_phy_reset(struct ata_port *ap) 2269c6fd2807SJeff Garzik { 2270c6fd2807SJeff Garzik u32 sstatus; 2271c6fd2807SJeff Garzik unsigned long timeout = jiffies + (HZ * 5); 2272c6fd2807SJeff Garzik 2273c6fd2807SJeff Garzik if (ap->flags & ATA_FLAG_SATA_RESET) { 2274c6fd2807SJeff Garzik /* issue phy wake/reset */ 2275c6fd2807SJeff Garzik sata_scr_write_flush(ap, SCR_CONTROL, 0x301); 2276c6fd2807SJeff Garzik /* Couldn't find anything in SATA I/II specs, but 2277c6fd2807SJeff Garzik * AHCI-1.1 10.4.2 says at least 1 ms. */ 2278c6fd2807SJeff Garzik mdelay(1); 2279c6fd2807SJeff Garzik } 2280c6fd2807SJeff Garzik /* phy wake/clear reset */ 2281c6fd2807SJeff Garzik sata_scr_write_flush(ap, SCR_CONTROL, 0x300); 2282c6fd2807SJeff Garzik 2283c6fd2807SJeff Garzik /* wait for phy to become ready, if necessary */ 2284c6fd2807SJeff Garzik do { 2285c6fd2807SJeff Garzik msleep(200); 2286c6fd2807SJeff Garzik sata_scr_read(ap, SCR_STATUS, &sstatus); 2287c6fd2807SJeff Garzik if ((sstatus & 0xf) != 1) 2288c6fd2807SJeff Garzik break; 2289c6fd2807SJeff Garzik } while (time_before(jiffies, timeout)); 2290c6fd2807SJeff Garzik 2291c6fd2807SJeff Garzik /* print link status */ 2292c6fd2807SJeff Garzik sata_print_link_status(ap); 2293c6fd2807SJeff Garzik 2294c6fd2807SJeff Garzik /* TODO: phy layer with polling, timeouts, etc. */ 2295c6fd2807SJeff Garzik if (!ata_port_offline(ap)) 2296c6fd2807SJeff Garzik ata_port_probe(ap); 2297c6fd2807SJeff Garzik else 2298c6fd2807SJeff Garzik ata_port_disable(ap); 2299c6fd2807SJeff Garzik 2300c6fd2807SJeff Garzik if (ap->flags & ATA_FLAG_DISABLED) 2301c6fd2807SJeff Garzik return; 2302c6fd2807SJeff Garzik 2303c6fd2807SJeff Garzik if (ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT)) { 2304c6fd2807SJeff Garzik ata_port_disable(ap); 2305c6fd2807SJeff Garzik return; 2306c6fd2807SJeff Garzik } 2307c6fd2807SJeff Garzik 2308c6fd2807SJeff Garzik ap->cbl = ATA_CBL_SATA; 2309c6fd2807SJeff Garzik } 2310c6fd2807SJeff Garzik 2311c6fd2807SJeff Garzik /** 2312c6fd2807SJeff Garzik * sata_phy_reset - Reset SATA bus. 2313c6fd2807SJeff Garzik * @ap: SATA port associated with target SATA PHY. 2314c6fd2807SJeff Garzik * 2315c6fd2807SJeff Garzik * This function resets the SATA bus, and then probes 2316c6fd2807SJeff Garzik * the bus for devices. 2317c6fd2807SJeff Garzik * 2318c6fd2807SJeff Garzik * LOCKING: 2319c6fd2807SJeff Garzik * PCI/etc. bus probe sem. 2320c6fd2807SJeff Garzik * 2321c6fd2807SJeff Garzik */ 2322c6fd2807SJeff Garzik void sata_phy_reset(struct ata_port *ap) 2323c6fd2807SJeff Garzik { 2324c6fd2807SJeff Garzik __sata_phy_reset(ap); 2325c6fd2807SJeff Garzik if (ap->flags & ATA_FLAG_DISABLED) 2326c6fd2807SJeff Garzik return; 2327c6fd2807SJeff Garzik ata_bus_reset(ap); 2328c6fd2807SJeff Garzik } 2329c6fd2807SJeff Garzik 2330c6fd2807SJeff Garzik /** 2331c6fd2807SJeff Garzik * ata_dev_pair - return other device on cable 2332c6fd2807SJeff Garzik * @adev: device 2333c6fd2807SJeff Garzik * 2334c6fd2807SJeff Garzik * Obtain the other device on the same cable, or if none is 2335c6fd2807SJeff Garzik * present NULL is returned 2336c6fd2807SJeff Garzik */ 2337c6fd2807SJeff Garzik 2338c6fd2807SJeff Garzik struct ata_device *ata_dev_pair(struct ata_device *adev) 2339c6fd2807SJeff Garzik { 2340c6fd2807SJeff Garzik struct ata_port *ap = adev->ap; 2341c6fd2807SJeff Garzik struct ata_device *pair = &ap->device[1 - adev->devno]; 2342c6fd2807SJeff Garzik if (!ata_dev_enabled(pair)) 2343c6fd2807SJeff Garzik return NULL; 2344c6fd2807SJeff Garzik return pair; 2345c6fd2807SJeff Garzik } 2346c6fd2807SJeff Garzik 2347c6fd2807SJeff Garzik /** 2348c6fd2807SJeff Garzik * ata_port_disable - Disable port. 2349c6fd2807SJeff Garzik * @ap: Port to be disabled. 2350c6fd2807SJeff Garzik * 2351c6fd2807SJeff Garzik * Modify @ap data structure such that the system 2352c6fd2807SJeff Garzik * thinks that the entire port is disabled, and should 2353c6fd2807SJeff Garzik * never attempt to probe or communicate with devices 2354c6fd2807SJeff Garzik * on this port. 2355c6fd2807SJeff Garzik * 2356cca3974eSJeff Garzik * LOCKING: host lock, or some other form of 2357c6fd2807SJeff Garzik * serialization. 2358c6fd2807SJeff Garzik */ 2359c6fd2807SJeff Garzik 2360c6fd2807SJeff Garzik void ata_port_disable(struct ata_port *ap) 2361c6fd2807SJeff Garzik { 2362c6fd2807SJeff Garzik ap->device[0].class = ATA_DEV_NONE; 2363c6fd2807SJeff Garzik ap->device[1].class = ATA_DEV_NONE; 2364c6fd2807SJeff Garzik ap->flags |= ATA_FLAG_DISABLED; 2365c6fd2807SJeff Garzik } 2366c6fd2807SJeff Garzik 2367c6fd2807SJeff Garzik /** 2368c6fd2807SJeff Garzik * sata_down_spd_limit - adjust SATA spd limit downward 2369c6fd2807SJeff Garzik * @ap: Port to adjust SATA spd limit for 2370c6fd2807SJeff Garzik * 2371c6fd2807SJeff Garzik * Adjust SATA spd limit of @ap downward. Note that this 2372c6fd2807SJeff Garzik * function only adjusts the limit. The change must be applied 2373c6fd2807SJeff Garzik * using sata_set_spd(). 2374c6fd2807SJeff Garzik * 2375c6fd2807SJeff Garzik * LOCKING: 2376c6fd2807SJeff Garzik * Inherited from caller. 2377c6fd2807SJeff Garzik * 2378c6fd2807SJeff Garzik * RETURNS: 2379c6fd2807SJeff Garzik * 0 on success, negative errno on failure 2380c6fd2807SJeff Garzik */ 2381c6fd2807SJeff Garzik int sata_down_spd_limit(struct ata_port *ap) 2382c6fd2807SJeff Garzik { 2383c6fd2807SJeff Garzik u32 sstatus, spd, mask; 2384c6fd2807SJeff Garzik int rc, highbit; 2385c6fd2807SJeff Garzik 2386c6fd2807SJeff Garzik rc = sata_scr_read(ap, SCR_STATUS, &sstatus); 2387c6fd2807SJeff Garzik if (rc) 2388c6fd2807SJeff Garzik return rc; 2389c6fd2807SJeff Garzik 2390c6fd2807SJeff Garzik mask = ap->sata_spd_limit; 2391c6fd2807SJeff Garzik if (mask <= 1) 2392c6fd2807SJeff Garzik return -EINVAL; 2393c6fd2807SJeff Garzik highbit = fls(mask) - 1; 2394c6fd2807SJeff Garzik mask &= ~(1 << highbit); 2395c6fd2807SJeff Garzik 2396c6fd2807SJeff Garzik spd = (sstatus >> 4) & 0xf; 2397c6fd2807SJeff Garzik if (spd <= 1) 2398c6fd2807SJeff Garzik return -EINVAL; 2399c6fd2807SJeff Garzik spd--; 2400c6fd2807SJeff Garzik mask &= (1 << spd) - 1; 2401c6fd2807SJeff Garzik if (!mask) 2402c6fd2807SJeff Garzik return -EINVAL; 2403c6fd2807SJeff Garzik 2404c6fd2807SJeff Garzik ap->sata_spd_limit = mask; 2405c6fd2807SJeff Garzik 2406c6fd2807SJeff Garzik ata_port_printk(ap, KERN_WARNING, "limiting SATA link speed to %s\n", 2407c6fd2807SJeff Garzik sata_spd_string(fls(mask))); 2408c6fd2807SJeff Garzik 2409c6fd2807SJeff Garzik return 0; 2410c6fd2807SJeff Garzik } 2411c6fd2807SJeff Garzik 2412c6fd2807SJeff Garzik static int __sata_set_spd_needed(struct ata_port *ap, u32 *scontrol) 2413c6fd2807SJeff Garzik { 2414c6fd2807SJeff Garzik u32 spd, limit; 2415c6fd2807SJeff Garzik 2416c6fd2807SJeff Garzik if (ap->sata_spd_limit == UINT_MAX) 2417c6fd2807SJeff Garzik limit = 0; 2418c6fd2807SJeff Garzik else 2419c6fd2807SJeff Garzik limit = fls(ap->sata_spd_limit); 2420c6fd2807SJeff Garzik 2421c6fd2807SJeff Garzik spd = (*scontrol >> 4) & 0xf; 2422c6fd2807SJeff Garzik *scontrol = (*scontrol & ~0xf0) | ((limit & 0xf) << 4); 2423c6fd2807SJeff Garzik 2424c6fd2807SJeff Garzik return spd != limit; 2425c6fd2807SJeff Garzik } 2426c6fd2807SJeff Garzik 2427c6fd2807SJeff Garzik /** 2428c6fd2807SJeff Garzik * sata_set_spd_needed - is SATA spd configuration needed 2429c6fd2807SJeff Garzik * @ap: Port in question 2430c6fd2807SJeff Garzik * 2431c6fd2807SJeff Garzik * Test whether the spd limit in SControl matches 2432c6fd2807SJeff Garzik * @ap->sata_spd_limit. This function is used to determine 2433c6fd2807SJeff Garzik * whether hardreset is necessary to apply SATA spd 2434c6fd2807SJeff Garzik * configuration. 2435c6fd2807SJeff Garzik * 2436c6fd2807SJeff Garzik * LOCKING: 2437c6fd2807SJeff Garzik * Inherited from caller. 2438c6fd2807SJeff Garzik * 2439c6fd2807SJeff Garzik * RETURNS: 2440c6fd2807SJeff Garzik * 1 if SATA spd configuration is needed, 0 otherwise. 2441c6fd2807SJeff Garzik */ 2442c6fd2807SJeff Garzik int sata_set_spd_needed(struct ata_port *ap) 2443c6fd2807SJeff Garzik { 2444c6fd2807SJeff Garzik u32 scontrol; 2445c6fd2807SJeff Garzik 2446c6fd2807SJeff Garzik if (sata_scr_read(ap, SCR_CONTROL, &scontrol)) 2447c6fd2807SJeff Garzik return 0; 2448c6fd2807SJeff Garzik 2449c6fd2807SJeff Garzik return __sata_set_spd_needed(ap, &scontrol); 2450c6fd2807SJeff Garzik } 2451c6fd2807SJeff Garzik 2452c6fd2807SJeff Garzik /** 2453c6fd2807SJeff Garzik * sata_set_spd - set SATA spd according to spd limit 2454c6fd2807SJeff Garzik * @ap: Port to set SATA spd for 2455c6fd2807SJeff Garzik * 2456c6fd2807SJeff Garzik * Set SATA spd of @ap according to sata_spd_limit. 2457c6fd2807SJeff Garzik * 2458c6fd2807SJeff Garzik * LOCKING: 2459c6fd2807SJeff Garzik * Inherited from caller. 2460c6fd2807SJeff Garzik * 2461c6fd2807SJeff Garzik * RETURNS: 2462c6fd2807SJeff Garzik * 0 if spd doesn't need to be changed, 1 if spd has been 2463c6fd2807SJeff Garzik * changed. Negative errno if SCR registers are inaccessible. 2464c6fd2807SJeff Garzik */ 2465c6fd2807SJeff Garzik int sata_set_spd(struct ata_port *ap) 2466c6fd2807SJeff Garzik { 2467c6fd2807SJeff Garzik u32 scontrol; 2468c6fd2807SJeff Garzik int rc; 2469c6fd2807SJeff Garzik 2470c6fd2807SJeff Garzik if ((rc = sata_scr_read(ap, SCR_CONTROL, &scontrol))) 2471c6fd2807SJeff Garzik return rc; 2472c6fd2807SJeff Garzik 2473c6fd2807SJeff Garzik if (!__sata_set_spd_needed(ap, &scontrol)) 2474c6fd2807SJeff Garzik return 0; 2475c6fd2807SJeff Garzik 2476c6fd2807SJeff Garzik if ((rc = sata_scr_write(ap, SCR_CONTROL, scontrol))) 2477c6fd2807SJeff Garzik return rc; 2478c6fd2807SJeff Garzik 2479c6fd2807SJeff Garzik return 1; 2480c6fd2807SJeff Garzik } 2481c6fd2807SJeff Garzik 2482c6fd2807SJeff Garzik /* 2483c6fd2807SJeff Garzik * This mode timing computation functionality is ported over from 2484c6fd2807SJeff Garzik * drivers/ide/ide-timing.h and was originally written by Vojtech Pavlik 2485c6fd2807SJeff Garzik */ 2486c6fd2807SJeff Garzik /* 2487b352e57dSAlan Cox * PIO 0-4, MWDMA 0-2 and UDMA 0-6 timings (in nanoseconds). 2488c6fd2807SJeff Garzik * These were taken from ATA/ATAPI-6 standard, rev 0a, except 2489b352e57dSAlan Cox * for UDMA6, which is currently supported only by Maxtor drives. 2490b352e57dSAlan Cox * 2491b352e57dSAlan Cox * For PIO 5/6 MWDMA 3/4 see the CFA specification 3.0. 2492c6fd2807SJeff Garzik */ 2493c6fd2807SJeff Garzik 2494c6fd2807SJeff Garzik static const struct ata_timing ata_timing[] = { 2495c6fd2807SJeff Garzik 2496c6fd2807SJeff Garzik { XFER_UDMA_6, 0, 0, 0, 0, 0, 0, 0, 15 }, 2497c6fd2807SJeff Garzik { XFER_UDMA_5, 0, 0, 0, 0, 0, 0, 0, 20 }, 2498c6fd2807SJeff Garzik { XFER_UDMA_4, 0, 0, 0, 0, 0, 0, 0, 30 }, 2499c6fd2807SJeff Garzik { XFER_UDMA_3, 0, 0, 0, 0, 0, 0, 0, 45 }, 2500c6fd2807SJeff Garzik 2501b352e57dSAlan Cox { XFER_MW_DMA_4, 25, 0, 0, 0, 55, 20, 80, 0 }, 2502b352e57dSAlan Cox { XFER_MW_DMA_3, 25, 0, 0, 0, 65, 25, 100, 0 }, 2503c6fd2807SJeff Garzik { XFER_UDMA_2, 0, 0, 0, 0, 0, 0, 0, 60 }, 2504c6fd2807SJeff Garzik { XFER_UDMA_1, 0, 0, 0, 0, 0, 0, 0, 80 }, 2505c6fd2807SJeff Garzik { XFER_UDMA_0, 0, 0, 0, 0, 0, 0, 0, 120 }, 2506c6fd2807SJeff Garzik 2507c6fd2807SJeff Garzik /* { XFER_UDMA_SLOW, 0, 0, 0, 0, 0, 0, 0, 150 }, */ 2508c6fd2807SJeff Garzik 2509c6fd2807SJeff Garzik { XFER_MW_DMA_2, 25, 0, 0, 0, 70, 25, 120, 0 }, 2510c6fd2807SJeff Garzik { XFER_MW_DMA_1, 45, 0, 0, 0, 80, 50, 150, 0 }, 2511c6fd2807SJeff Garzik { XFER_MW_DMA_0, 60, 0, 0, 0, 215, 215, 480, 0 }, 2512c6fd2807SJeff Garzik 2513c6fd2807SJeff Garzik { XFER_SW_DMA_2, 60, 0, 0, 0, 120, 120, 240, 0 }, 2514c6fd2807SJeff Garzik { XFER_SW_DMA_1, 90, 0, 0, 0, 240, 240, 480, 0 }, 2515c6fd2807SJeff Garzik { XFER_SW_DMA_0, 120, 0, 0, 0, 480, 480, 960, 0 }, 2516c6fd2807SJeff Garzik 2517b352e57dSAlan Cox { XFER_PIO_6, 10, 55, 20, 80, 55, 20, 80, 0 }, 2518b352e57dSAlan Cox { XFER_PIO_5, 15, 65, 25, 100, 65, 25, 100, 0 }, 2519c6fd2807SJeff Garzik { XFER_PIO_4, 25, 70, 25, 120, 70, 25, 120, 0 }, 2520c6fd2807SJeff Garzik { XFER_PIO_3, 30, 80, 70, 180, 80, 70, 180, 0 }, 2521c6fd2807SJeff Garzik 2522c6fd2807SJeff Garzik { XFER_PIO_2, 30, 290, 40, 330, 100, 90, 240, 0 }, 2523c6fd2807SJeff Garzik { XFER_PIO_1, 50, 290, 93, 383, 125, 100, 383, 0 }, 2524c6fd2807SJeff Garzik { XFER_PIO_0, 70, 290, 240, 600, 165, 150, 600, 0 }, 2525c6fd2807SJeff Garzik 2526c6fd2807SJeff Garzik /* { XFER_PIO_SLOW, 120, 290, 240, 960, 290, 240, 960, 0 }, */ 2527c6fd2807SJeff Garzik 2528c6fd2807SJeff Garzik { 0xFF } 2529c6fd2807SJeff Garzik }; 2530c6fd2807SJeff Garzik 2531c6fd2807SJeff Garzik #define ENOUGH(v,unit) (((v)-1)/(unit)+1) 2532c6fd2807SJeff Garzik #define EZ(v,unit) ((v)?ENOUGH(v,unit):0) 2533c6fd2807SJeff Garzik 2534c6fd2807SJeff Garzik static void ata_timing_quantize(const struct ata_timing *t, struct ata_timing *q, int T, int UT) 2535c6fd2807SJeff Garzik { 2536c6fd2807SJeff Garzik q->setup = EZ(t->setup * 1000, T); 2537c6fd2807SJeff Garzik q->act8b = EZ(t->act8b * 1000, T); 2538c6fd2807SJeff Garzik q->rec8b = EZ(t->rec8b * 1000, T); 2539c6fd2807SJeff Garzik q->cyc8b = EZ(t->cyc8b * 1000, T); 2540c6fd2807SJeff Garzik q->active = EZ(t->active * 1000, T); 2541c6fd2807SJeff Garzik q->recover = EZ(t->recover * 1000, T); 2542c6fd2807SJeff Garzik q->cycle = EZ(t->cycle * 1000, T); 2543c6fd2807SJeff Garzik q->udma = EZ(t->udma * 1000, UT); 2544c6fd2807SJeff Garzik } 2545c6fd2807SJeff Garzik 2546c6fd2807SJeff Garzik void ata_timing_merge(const struct ata_timing *a, const struct ata_timing *b, 2547c6fd2807SJeff Garzik struct ata_timing *m, unsigned int what) 2548c6fd2807SJeff Garzik { 2549c6fd2807SJeff Garzik if (what & ATA_TIMING_SETUP ) m->setup = max(a->setup, b->setup); 2550c6fd2807SJeff Garzik if (what & ATA_TIMING_ACT8B ) m->act8b = max(a->act8b, b->act8b); 2551c6fd2807SJeff Garzik if (what & ATA_TIMING_REC8B ) m->rec8b = max(a->rec8b, b->rec8b); 2552c6fd2807SJeff Garzik if (what & ATA_TIMING_CYC8B ) m->cyc8b = max(a->cyc8b, b->cyc8b); 2553c6fd2807SJeff Garzik if (what & ATA_TIMING_ACTIVE ) m->active = max(a->active, b->active); 2554c6fd2807SJeff Garzik if (what & ATA_TIMING_RECOVER) m->recover = max(a->recover, b->recover); 2555c6fd2807SJeff Garzik if (what & ATA_TIMING_CYCLE ) m->cycle = max(a->cycle, b->cycle); 2556c6fd2807SJeff Garzik if (what & ATA_TIMING_UDMA ) m->udma = max(a->udma, b->udma); 2557c6fd2807SJeff Garzik } 2558c6fd2807SJeff Garzik 2559c6fd2807SJeff Garzik static const struct ata_timing* ata_timing_find_mode(unsigned short speed) 2560c6fd2807SJeff Garzik { 2561c6fd2807SJeff Garzik const struct ata_timing *t; 2562c6fd2807SJeff Garzik 2563c6fd2807SJeff Garzik for (t = ata_timing; t->mode != speed; t++) 2564c6fd2807SJeff Garzik if (t->mode == 0xFF) 2565c6fd2807SJeff Garzik return NULL; 2566c6fd2807SJeff Garzik return t; 2567c6fd2807SJeff Garzik } 2568c6fd2807SJeff Garzik 2569c6fd2807SJeff Garzik int ata_timing_compute(struct ata_device *adev, unsigned short speed, 2570c6fd2807SJeff Garzik struct ata_timing *t, int T, int UT) 2571c6fd2807SJeff Garzik { 2572c6fd2807SJeff Garzik const struct ata_timing *s; 2573c6fd2807SJeff Garzik struct ata_timing p; 2574c6fd2807SJeff Garzik 2575c6fd2807SJeff Garzik /* 2576c6fd2807SJeff Garzik * Find the mode. 2577c6fd2807SJeff Garzik */ 2578c6fd2807SJeff Garzik 2579c6fd2807SJeff Garzik if (!(s = ata_timing_find_mode(speed))) 2580c6fd2807SJeff Garzik return -EINVAL; 2581c6fd2807SJeff Garzik 2582c6fd2807SJeff Garzik memcpy(t, s, sizeof(*s)); 2583c6fd2807SJeff Garzik 2584c6fd2807SJeff Garzik /* 2585c6fd2807SJeff Garzik * If the drive is an EIDE drive, it can tell us it needs extended 2586c6fd2807SJeff Garzik * PIO/MW_DMA cycle timing. 2587c6fd2807SJeff Garzik */ 2588c6fd2807SJeff Garzik 2589c6fd2807SJeff Garzik if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE drive */ 2590c6fd2807SJeff Garzik memset(&p, 0, sizeof(p)); 2591c6fd2807SJeff Garzik if(speed >= XFER_PIO_0 && speed <= XFER_SW_DMA_0) { 2592c6fd2807SJeff Garzik if (speed <= XFER_PIO_2) p.cycle = p.cyc8b = adev->id[ATA_ID_EIDE_PIO]; 2593c6fd2807SJeff Garzik else p.cycle = p.cyc8b = adev->id[ATA_ID_EIDE_PIO_IORDY]; 2594c6fd2807SJeff Garzik } else if(speed >= XFER_MW_DMA_0 && speed <= XFER_MW_DMA_2) { 2595c6fd2807SJeff Garzik p.cycle = adev->id[ATA_ID_EIDE_DMA_MIN]; 2596c6fd2807SJeff Garzik } 2597c6fd2807SJeff Garzik ata_timing_merge(&p, t, t, ATA_TIMING_CYCLE | ATA_TIMING_CYC8B); 2598c6fd2807SJeff Garzik } 2599c6fd2807SJeff Garzik 2600c6fd2807SJeff Garzik /* 2601c6fd2807SJeff Garzik * Convert the timing to bus clock counts. 2602c6fd2807SJeff Garzik */ 2603c6fd2807SJeff Garzik 2604c6fd2807SJeff Garzik ata_timing_quantize(t, t, T, UT); 2605c6fd2807SJeff Garzik 2606c6fd2807SJeff Garzik /* 2607c6fd2807SJeff Garzik * Even in DMA/UDMA modes we still use PIO access for IDENTIFY, 2608c6fd2807SJeff Garzik * S.M.A.R.T * and some other commands. We have to ensure that the 2609c6fd2807SJeff Garzik * DMA cycle timing is slower/equal than the fastest PIO timing. 2610c6fd2807SJeff Garzik */ 2611c6fd2807SJeff Garzik 2612fd3367afSAlan if (speed > XFER_PIO_6) { 2613c6fd2807SJeff Garzik ata_timing_compute(adev, adev->pio_mode, &p, T, UT); 2614c6fd2807SJeff Garzik ata_timing_merge(&p, t, t, ATA_TIMING_ALL); 2615c6fd2807SJeff Garzik } 2616c6fd2807SJeff Garzik 2617c6fd2807SJeff Garzik /* 2618c6fd2807SJeff Garzik * Lengthen active & recovery time so that cycle time is correct. 2619c6fd2807SJeff Garzik */ 2620c6fd2807SJeff Garzik 2621c6fd2807SJeff Garzik if (t->act8b + t->rec8b < t->cyc8b) { 2622c6fd2807SJeff Garzik t->act8b += (t->cyc8b - (t->act8b + t->rec8b)) / 2; 2623c6fd2807SJeff Garzik t->rec8b = t->cyc8b - t->act8b; 2624c6fd2807SJeff Garzik } 2625c6fd2807SJeff Garzik 2626c6fd2807SJeff Garzik if (t->active + t->recover < t->cycle) { 2627c6fd2807SJeff Garzik t->active += (t->cycle - (t->active + t->recover)) / 2; 2628c6fd2807SJeff Garzik t->recover = t->cycle - t->active; 2629c6fd2807SJeff Garzik } 26304f701d1eSAlan Cox 26314f701d1eSAlan Cox /* In a few cases quantisation may produce enough errors to 26324f701d1eSAlan Cox leave t->cycle too low for the sum of active and recovery 26334f701d1eSAlan Cox if so we must correct this */ 26344f701d1eSAlan Cox if (t->active + t->recover > t->cycle) 26354f701d1eSAlan Cox t->cycle = t->active + t->recover; 2636c6fd2807SJeff Garzik 2637c6fd2807SJeff Garzik return 0; 2638c6fd2807SJeff Garzik } 2639c6fd2807SJeff Garzik 2640c6fd2807SJeff Garzik /** 2641c6fd2807SJeff Garzik * ata_down_xfermask_limit - adjust dev xfer masks downward 2642c6fd2807SJeff Garzik * @dev: Device to adjust xfer masks 2643458337dbSTejun Heo * @sel: ATA_DNXFER_* selector 2644c6fd2807SJeff Garzik * 2645c6fd2807SJeff Garzik * Adjust xfer masks of @dev downward. Note that this function 2646c6fd2807SJeff Garzik * does not apply the change. Invoking ata_set_mode() afterwards 2647c6fd2807SJeff Garzik * will apply the limit. 2648c6fd2807SJeff Garzik * 2649c6fd2807SJeff Garzik * LOCKING: 2650c6fd2807SJeff Garzik * Inherited from caller. 2651c6fd2807SJeff Garzik * 2652c6fd2807SJeff Garzik * RETURNS: 2653c6fd2807SJeff Garzik * 0 on success, negative errno on failure 2654c6fd2807SJeff Garzik */ 2655458337dbSTejun Heo int ata_down_xfermask_limit(struct ata_device *dev, unsigned int sel) 2656c6fd2807SJeff Garzik { 2657458337dbSTejun Heo char buf[32]; 2658458337dbSTejun Heo unsigned int orig_mask, xfer_mask; 2659458337dbSTejun Heo unsigned int pio_mask, mwdma_mask, udma_mask; 2660458337dbSTejun Heo int quiet, highbit; 2661c6fd2807SJeff Garzik 2662458337dbSTejun Heo quiet = !!(sel & ATA_DNXFER_QUIET); 2663458337dbSTejun Heo sel &= ~ATA_DNXFER_QUIET; 2664458337dbSTejun Heo 2665458337dbSTejun Heo xfer_mask = orig_mask = ata_pack_xfermask(dev->pio_mask, 2666458337dbSTejun Heo dev->mwdma_mask, 2667c6fd2807SJeff Garzik dev->udma_mask); 2668458337dbSTejun Heo ata_unpack_xfermask(xfer_mask, &pio_mask, &mwdma_mask, &udma_mask); 2669c6fd2807SJeff Garzik 2670458337dbSTejun Heo switch (sel) { 2671458337dbSTejun Heo case ATA_DNXFER_PIO: 2672458337dbSTejun Heo highbit = fls(pio_mask) - 1; 2673458337dbSTejun Heo pio_mask &= ~(1 << highbit); 2674458337dbSTejun Heo break; 2675458337dbSTejun Heo 2676458337dbSTejun Heo case ATA_DNXFER_DMA: 2677458337dbSTejun Heo if (udma_mask) { 2678458337dbSTejun Heo highbit = fls(udma_mask) - 1; 2679458337dbSTejun Heo udma_mask &= ~(1 << highbit); 2680458337dbSTejun Heo if (!udma_mask) 2681458337dbSTejun Heo return -ENOENT; 2682458337dbSTejun Heo } else if (mwdma_mask) { 2683458337dbSTejun Heo highbit = fls(mwdma_mask) - 1; 2684458337dbSTejun Heo mwdma_mask &= ~(1 << highbit); 2685458337dbSTejun Heo if (!mwdma_mask) 2686458337dbSTejun Heo return -ENOENT; 2687458337dbSTejun Heo } 2688458337dbSTejun Heo break; 2689458337dbSTejun Heo 2690458337dbSTejun Heo case ATA_DNXFER_40C: 2691458337dbSTejun Heo udma_mask &= ATA_UDMA_MASK_40C; 2692458337dbSTejun Heo break; 2693458337dbSTejun Heo 2694458337dbSTejun Heo case ATA_DNXFER_FORCE_PIO0: 2695458337dbSTejun Heo pio_mask &= 1; 2696458337dbSTejun Heo case ATA_DNXFER_FORCE_PIO: 2697458337dbSTejun Heo mwdma_mask = 0; 2698458337dbSTejun Heo udma_mask = 0; 2699458337dbSTejun Heo break; 2700458337dbSTejun Heo 2701458337dbSTejun Heo default: 2702458337dbSTejun Heo BUG(); 2703458337dbSTejun Heo } 2704458337dbSTejun Heo 2705458337dbSTejun Heo xfer_mask &= ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask); 2706458337dbSTejun Heo 2707458337dbSTejun Heo if (!(xfer_mask & ATA_MASK_PIO) || xfer_mask == orig_mask) 2708458337dbSTejun Heo return -ENOENT; 2709458337dbSTejun Heo 2710458337dbSTejun Heo if (!quiet) { 2711458337dbSTejun Heo if (xfer_mask & (ATA_MASK_MWDMA | ATA_MASK_UDMA)) 2712458337dbSTejun Heo snprintf(buf, sizeof(buf), "%s:%s", 2713458337dbSTejun Heo ata_mode_string(xfer_mask), 2714458337dbSTejun Heo ata_mode_string(xfer_mask & ATA_MASK_PIO)); 2715458337dbSTejun Heo else 2716458337dbSTejun Heo snprintf(buf, sizeof(buf), "%s", 2717458337dbSTejun Heo ata_mode_string(xfer_mask)); 2718458337dbSTejun Heo 2719458337dbSTejun Heo ata_dev_printk(dev, KERN_WARNING, 2720458337dbSTejun Heo "limiting speed to %s\n", buf); 2721458337dbSTejun Heo } 2722c6fd2807SJeff Garzik 2723c6fd2807SJeff Garzik ata_unpack_xfermask(xfer_mask, &dev->pio_mask, &dev->mwdma_mask, 2724c6fd2807SJeff Garzik &dev->udma_mask); 2725c6fd2807SJeff Garzik 2726c6fd2807SJeff Garzik return 0; 2727c6fd2807SJeff Garzik } 2728c6fd2807SJeff Garzik 2729c6fd2807SJeff Garzik static int ata_dev_set_mode(struct ata_device *dev) 2730c6fd2807SJeff Garzik { 2731baa1e78aSTejun Heo struct ata_eh_context *ehc = &dev->ap->eh_context; 2732c6fd2807SJeff Garzik unsigned int err_mask; 2733c6fd2807SJeff Garzik int rc; 2734c6fd2807SJeff Garzik 2735c6fd2807SJeff Garzik dev->flags &= ~ATA_DFLAG_PIO; 2736c6fd2807SJeff Garzik if (dev->xfer_shift == ATA_SHIFT_PIO) 2737c6fd2807SJeff Garzik dev->flags |= ATA_DFLAG_PIO; 2738c6fd2807SJeff Garzik 2739c6fd2807SJeff Garzik err_mask = ata_dev_set_xfermode(dev); 274011750a40SAlan /* Old CFA may refuse this command, which is just fine */ 274111750a40SAlan if (dev->xfer_shift == ATA_SHIFT_PIO && ata_id_is_cfa(dev->id)) 274211750a40SAlan err_mask &= ~AC_ERR_DEV; 274311750a40SAlan 2744c6fd2807SJeff Garzik if (err_mask) { 2745c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_ERR, "failed to set xfermode " 2746c6fd2807SJeff Garzik "(err_mask=0x%x)\n", err_mask); 2747c6fd2807SJeff Garzik return -EIO; 2748c6fd2807SJeff Garzik } 2749c6fd2807SJeff Garzik 2750baa1e78aSTejun Heo ehc->i.flags |= ATA_EHI_POST_SETMODE; 2751c6fd2807SJeff Garzik rc = ata_dev_revalidate(dev, 0); 2752baa1e78aSTejun Heo ehc->i.flags &= ~ATA_EHI_POST_SETMODE; 2753c6fd2807SJeff Garzik if (rc) 2754c6fd2807SJeff Garzik return rc; 2755c6fd2807SJeff Garzik 2756c6fd2807SJeff Garzik DPRINTK("xfer_shift=%u, xfer_mode=0x%x\n", 2757c6fd2807SJeff Garzik dev->xfer_shift, (int)dev->xfer_mode); 2758c6fd2807SJeff Garzik 2759c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_INFO, "configured for %s\n", 2760c6fd2807SJeff Garzik ata_mode_string(ata_xfer_mode2mask(dev->xfer_mode))); 2761c6fd2807SJeff Garzik return 0; 2762c6fd2807SJeff Garzik } 2763c6fd2807SJeff Garzik 2764c6fd2807SJeff Garzik /** 276504351821SAlan * ata_do_set_mode - Program timings and issue SET FEATURES - XFER 2766c6fd2807SJeff Garzik * @ap: port on which timings will be programmed 2767c6fd2807SJeff Garzik * @r_failed_dev: out paramter for failed device 2768c6fd2807SJeff Garzik * 276904351821SAlan * Standard implementation of the function used to tune and set 277004351821SAlan * ATA device disk transfer mode (PIO3, UDMA6, etc.). If 277104351821SAlan * ata_dev_set_mode() fails, pointer to the failing device is 2772c6fd2807SJeff Garzik * returned in @r_failed_dev. 2773c6fd2807SJeff Garzik * 2774c6fd2807SJeff Garzik * LOCKING: 2775c6fd2807SJeff Garzik * PCI/etc. bus probe sem. 2776c6fd2807SJeff Garzik * 2777c6fd2807SJeff Garzik * RETURNS: 2778c6fd2807SJeff Garzik * 0 on success, negative errno otherwise 2779c6fd2807SJeff Garzik */ 278004351821SAlan 278104351821SAlan int ata_do_set_mode(struct ata_port *ap, struct ata_device **r_failed_dev) 2782c6fd2807SJeff Garzik { 2783c6fd2807SJeff Garzik struct ata_device *dev; 2784c6fd2807SJeff Garzik int i, rc = 0, used_dma = 0, found = 0; 2785c6fd2807SJeff Garzik 2786c6fd2807SJeff Garzik 2787c6fd2807SJeff Garzik /* step 1: calculate xfer_mask */ 2788c6fd2807SJeff Garzik for (i = 0; i < ATA_MAX_DEVICES; i++) { 2789c6fd2807SJeff Garzik unsigned int pio_mask, dma_mask; 2790c6fd2807SJeff Garzik 2791c6fd2807SJeff Garzik dev = &ap->device[i]; 2792c6fd2807SJeff Garzik 2793c6fd2807SJeff Garzik if (!ata_dev_enabled(dev)) 2794c6fd2807SJeff Garzik continue; 2795c6fd2807SJeff Garzik 2796c6fd2807SJeff Garzik ata_dev_xfermask(dev); 2797c6fd2807SJeff Garzik 2798c6fd2807SJeff Garzik pio_mask = ata_pack_xfermask(dev->pio_mask, 0, 0); 2799c6fd2807SJeff Garzik dma_mask = ata_pack_xfermask(0, dev->mwdma_mask, dev->udma_mask); 2800c6fd2807SJeff Garzik dev->pio_mode = ata_xfer_mask2mode(pio_mask); 2801c6fd2807SJeff Garzik dev->dma_mode = ata_xfer_mask2mode(dma_mask); 2802c6fd2807SJeff Garzik 2803c6fd2807SJeff Garzik found = 1; 2804c6fd2807SJeff Garzik if (dev->dma_mode) 2805c6fd2807SJeff Garzik used_dma = 1; 2806c6fd2807SJeff Garzik } 2807c6fd2807SJeff Garzik if (!found) 2808c6fd2807SJeff Garzik goto out; 2809c6fd2807SJeff Garzik 2810c6fd2807SJeff Garzik /* step 2: always set host PIO timings */ 2811c6fd2807SJeff Garzik for (i = 0; i < ATA_MAX_DEVICES; i++) { 2812c6fd2807SJeff Garzik dev = &ap->device[i]; 2813c6fd2807SJeff Garzik if (!ata_dev_enabled(dev)) 2814c6fd2807SJeff Garzik continue; 2815c6fd2807SJeff Garzik 2816c6fd2807SJeff Garzik if (!dev->pio_mode) { 2817c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_WARNING, "no PIO support\n"); 2818c6fd2807SJeff Garzik rc = -EINVAL; 2819c6fd2807SJeff Garzik goto out; 2820c6fd2807SJeff Garzik } 2821c6fd2807SJeff Garzik 2822c6fd2807SJeff Garzik dev->xfer_mode = dev->pio_mode; 2823c6fd2807SJeff Garzik dev->xfer_shift = ATA_SHIFT_PIO; 2824c6fd2807SJeff Garzik if (ap->ops->set_piomode) 2825c6fd2807SJeff Garzik ap->ops->set_piomode(ap, dev); 2826c6fd2807SJeff Garzik } 2827c6fd2807SJeff Garzik 2828c6fd2807SJeff Garzik /* step 3: set host DMA timings */ 2829c6fd2807SJeff Garzik for (i = 0; i < ATA_MAX_DEVICES; i++) { 2830c6fd2807SJeff Garzik dev = &ap->device[i]; 2831c6fd2807SJeff Garzik 2832c6fd2807SJeff Garzik if (!ata_dev_enabled(dev) || !dev->dma_mode) 2833c6fd2807SJeff Garzik continue; 2834c6fd2807SJeff Garzik 2835c6fd2807SJeff Garzik dev->xfer_mode = dev->dma_mode; 2836c6fd2807SJeff Garzik dev->xfer_shift = ata_xfer_mode2shift(dev->dma_mode); 2837c6fd2807SJeff Garzik if (ap->ops->set_dmamode) 2838c6fd2807SJeff Garzik ap->ops->set_dmamode(ap, dev); 2839c6fd2807SJeff Garzik } 2840c6fd2807SJeff Garzik 2841c6fd2807SJeff Garzik /* step 4: update devices' xfer mode */ 2842c6fd2807SJeff Garzik for (i = 0; i < ATA_MAX_DEVICES; i++) { 2843c6fd2807SJeff Garzik dev = &ap->device[i]; 2844c6fd2807SJeff Garzik 284518d90debSAlan /* don't update suspended devices' xfer mode */ 28469666f400STejun Heo if (!ata_dev_enabled(dev)) 2847c6fd2807SJeff Garzik continue; 2848c6fd2807SJeff Garzik 2849c6fd2807SJeff Garzik rc = ata_dev_set_mode(dev); 2850c6fd2807SJeff Garzik if (rc) 2851c6fd2807SJeff Garzik goto out; 2852c6fd2807SJeff Garzik } 2853c6fd2807SJeff Garzik 2854c6fd2807SJeff Garzik /* Record simplex status. If we selected DMA then the other 2855c6fd2807SJeff Garzik * host channels are not permitted to do so. 2856c6fd2807SJeff Garzik */ 2857cca3974eSJeff Garzik if (used_dma && (ap->host->flags & ATA_HOST_SIMPLEX)) 2858032af1ceSAlan ap->host->simplex_claimed = ap; 2859c6fd2807SJeff Garzik 2860c6fd2807SJeff Garzik out: 2861c6fd2807SJeff Garzik if (rc) 2862c6fd2807SJeff Garzik *r_failed_dev = dev; 2863c6fd2807SJeff Garzik return rc; 2864c6fd2807SJeff Garzik } 2865c6fd2807SJeff Garzik 2866c6fd2807SJeff Garzik /** 286704351821SAlan * ata_set_mode - Program timings and issue SET FEATURES - XFER 286804351821SAlan * @ap: port on which timings will be programmed 286904351821SAlan * @r_failed_dev: out paramter for failed device 287004351821SAlan * 287104351821SAlan * Set ATA device disk transfer mode (PIO3, UDMA6, etc.). If 287204351821SAlan * ata_set_mode() fails, pointer to the failing device is 287304351821SAlan * returned in @r_failed_dev. 287404351821SAlan * 287504351821SAlan * LOCKING: 287604351821SAlan * PCI/etc. bus probe sem. 287704351821SAlan * 287804351821SAlan * RETURNS: 287904351821SAlan * 0 on success, negative errno otherwise 288004351821SAlan */ 288104351821SAlan int ata_set_mode(struct ata_port *ap, struct ata_device **r_failed_dev) 288204351821SAlan { 288304351821SAlan /* has private set_mode? */ 288404351821SAlan if (ap->ops->set_mode) 288504351821SAlan return ap->ops->set_mode(ap, r_failed_dev); 288604351821SAlan return ata_do_set_mode(ap, r_failed_dev); 288704351821SAlan } 288804351821SAlan 288904351821SAlan /** 2890c6fd2807SJeff Garzik * ata_tf_to_host - issue ATA taskfile to host controller 2891c6fd2807SJeff Garzik * @ap: port to which command is being issued 2892c6fd2807SJeff Garzik * @tf: ATA taskfile register set 2893c6fd2807SJeff Garzik * 2894c6fd2807SJeff Garzik * Issues ATA taskfile register set to ATA host controller, 2895c6fd2807SJeff Garzik * with proper synchronization with interrupt handler and 2896c6fd2807SJeff Garzik * other threads. 2897c6fd2807SJeff Garzik * 2898c6fd2807SJeff Garzik * LOCKING: 2899cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 2900c6fd2807SJeff Garzik */ 2901c6fd2807SJeff Garzik 2902c6fd2807SJeff Garzik static inline void ata_tf_to_host(struct ata_port *ap, 2903c6fd2807SJeff Garzik const struct ata_taskfile *tf) 2904c6fd2807SJeff Garzik { 2905c6fd2807SJeff Garzik ap->ops->tf_load(ap, tf); 2906c6fd2807SJeff Garzik ap->ops->exec_command(ap, tf); 2907c6fd2807SJeff Garzik } 2908c6fd2807SJeff Garzik 2909c6fd2807SJeff Garzik /** 2910c6fd2807SJeff Garzik * ata_busy_sleep - sleep until BSY clears, or timeout 2911c6fd2807SJeff Garzik * @ap: port containing status register to be polled 2912c6fd2807SJeff Garzik * @tmout_pat: impatience timeout 2913c6fd2807SJeff Garzik * @tmout: overall timeout 2914c6fd2807SJeff Garzik * 2915c6fd2807SJeff Garzik * Sleep until ATA Status register bit BSY clears, 2916c6fd2807SJeff Garzik * or a timeout occurs. 2917c6fd2807SJeff Garzik * 2918d1adc1bbSTejun Heo * LOCKING: 2919d1adc1bbSTejun Heo * Kernel thread context (may sleep). 2920d1adc1bbSTejun Heo * 2921d1adc1bbSTejun Heo * RETURNS: 2922d1adc1bbSTejun Heo * 0 on success, -errno otherwise. 2923c6fd2807SJeff Garzik */ 2924d1adc1bbSTejun Heo int ata_busy_sleep(struct ata_port *ap, 2925c6fd2807SJeff Garzik unsigned long tmout_pat, unsigned long tmout) 2926c6fd2807SJeff Garzik { 2927c6fd2807SJeff Garzik unsigned long timer_start, timeout; 2928c6fd2807SJeff Garzik u8 status; 2929c6fd2807SJeff Garzik 2930c6fd2807SJeff Garzik status = ata_busy_wait(ap, ATA_BUSY, 300); 2931c6fd2807SJeff Garzik timer_start = jiffies; 2932c6fd2807SJeff Garzik timeout = timer_start + tmout_pat; 2933d1adc1bbSTejun Heo while (status != 0xff && (status & ATA_BUSY) && 2934d1adc1bbSTejun Heo time_before(jiffies, timeout)) { 2935c6fd2807SJeff Garzik msleep(50); 2936c6fd2807SJeff Garzik status = ata_busy_wait(ap, ATA_BUSY, 3); 2937c6fd2807SJeff Garzik } 2938c6fd2807SJeff Garzik 2939d1adc1bbSTejun Heo if (status != 0xff && (status & ATA_BUSY)) 2940c6fd2807SJeff Garzik ata_port_printk(ap, KERN_WARNING, 294135aa7a43SJeff Garzik "port is slow to respond, please be patient " 294235aa7a43SJeff Garzik "(Status 0x%x)\n", status); 2943c6fd2807SJeff Garzik 2944c6fd2807SJeff Garzik timeout = timer_start + tmout; 2945d1adc1bbSTejun Heo while (status != 0xff && (status & ATA_BUSY) && 2946d1adc1bbSTejun Heo time_before(jiffies, timeout)) { 2947c6fd2807SJeff Garzik msleep(50); 2948c6fd2807SJeff Garzik status = ata_chk_status(ap); 2949c6fd2807SJeff Garzik } 2950c6fd2807SJeff Garzik 2951d1adc1bbSTejun Heo if (status == 0xff) 2952d1adc1bbSTejun Heo return -ENODEV; 2953d1adc1bbSTejun Heo 2954c6fd2807SJeff Garzik if (status & ATA_BUSY) { 2955c6fd2807SJeff Garzik ata_port_printk(ap, KERN_ERR, "port failed to respond " 295635aa7a43SJeff Garzik "(%lu secs, Status 0x%x)\n", 295735aa7a43SJeff Garzik tmout / HZ, status); 2958d1adc1bbSTejun Heo return -EBUSY; 2959c6fd2807SJeff Garzik } 2960c6fd2807SJeff Garzik 2961c6fd2807SJeff Garzik return 0; 2962c6fd2807SJeff Garzik } 2963c6fd2807SJeff Garzik 2964d4b2bab4STejun Heo /** 2965d4b2bab4STejun Heo * ata_wait_ready - sleep until BSY clears, or timeout 2966d4b2bab4STejun Heo * @ap: port containing status register to be polled 2967d4b2bab4STejun Heo * @deadline: deadline jiffies for the operation 2968d4b2bab4STejun Heo * 2969d4b2bab4STejun Heo * Sleep until ATA Status register bit BSY clears, or timeout 2970d4b2bab4STejun Heo * occurs. 2971d4b2bab4STejun Heo * 2972d4b2bab4STejun Heo * LOCKING: 2973d4b2bab4STejun Heo * Kernel thread context (may sleep). 2974d4b2bab4STejun Heo * 2975d4b2bab4STejun Heo * RETURNS: 2976d4b2bab4STejun Heo * 0 on success, -errno otherwise. 2977d4b2bab4STejun Heo */ 2978d4b2bab4STejun Heo int ata_wait_ready(struct ata_port *ap, unsigned long deadline) 2979d4b2bab4STejun Heo { 2980d4b2bab4STejun Heo unsigned long start = jiffies; 2981d4b2bab4STejun Heo int warned = 0; 2982d4b2bab4STejun Heo 2983d4b2bab4STejun Heo while (1) { 2984d4b2bab4STejun Heo u8 status = ata_chk_status(ap); 2985d4b2bab4STejun Heo unsigned long now = jiffies; 2986d4b2bab4STejun Heo 2987d4b2bab4STejun Heo if (!(status & ATA_BUSY)) 2988d4b2bab4STejun Heo return 0; 2989fd7fe701STejun Heo if (!ata_port_online(ap) && status == 0xff) 2990d4b2bab4STejun Heo return -ENODEV; 2991d4b2bab4STejun Heo if (time_after(now, deadline)) 2992d4b2bab4STejun Heo return -EBUSY; 2993d4b2bab4STejun Heo 2994d4b2bab4STejun Heo if (!warned && time_after(now, start + 5 * HZ) && 2995d4b2bab4STejun Heo (deadline - now > 3 * HZ)) { 2996d4b2bab4STejun Heo ata_port_printk(ap, KERN_WARNING, 2997d4b2bab4STejun Heo "port is slow to respond, please be patient " 2998d4b2bab4STejun Heo "(Status 0x%x)\n", status); 2999d4b2bab4STejun Heo warned = 1; 3000d4b2bab4STejun Heo } 3001d4b2bab4STejun Heo 3002d4b2bab4STejun Heo msleep(50); 3003d4b2bab4STejun Heo } 3004d4b2bab4STejun Heo } 3005d4b2bab4STejun Heo 3006d4b2bab4STejun Heo static int ata_bus_post_reset(struct ata_port *ap, unsigned int devmask, 3007d4b2bab4STejun Heo unsigned long deadline) 3008c6fd2807SJeff Garzik { 3009c6fd2807SJeff Garzik struct ata_ioports *ioaddr = &ap->ioaddr; 3010c6fd2807SJeff Garzik unsigned int dev0 = devmask & (1 << 0); 3011c6fd2807SJeff Garzik unsigned int dev1 = devmask & (1 << 1); 30129b89391cSTejun Heo int rc, ret = 0; 3013c6fd2807SJeff Garzik 3014c6fd2807SJeff Garzik /* if device 0 was found in ata_devchk, wait for its 3015c6fd2807SJeff Garzik * BSY bit to clear 3016c6fd2807SJeff Garzik */ 3017d4b2bab4STejun Heo if (dev0) { 3018d4b2bab4STejun Heo rc = ata_wait_ready(ap, deadline); 30199b89391cSTejun Heo if (rc) { 30209b89391cSTejun Heo if (rc != -ENODEV) 3021d4b2bab4STejun Heo return rc; 30229b89391cSTejun Heo ret = rc; 30239b89391cSTejun Heo } 3024d4b2bab4STejun Heo } 3025c6fd2807SJeff Garzik 3026e141d999STejun Heo /* if device 1 was found in ata_devchk, wait for register 3027e141d999STejun Heo * access briefly, then wait for BSY to clear. 3028c6fd2807SJeff Garzik */ 3029e141d999STejun Heo if (dev1) { 3030e141d999STejun Heo int i; 3031c6fd2807SJeff Garzik 3032c6fd2807SJeff Garzik ap->ops->dev_select(ap, 1); 3033e141d999STejun Heo 3034e141d999STejun Heo /* Wait for register access. Some ATAPI devices fail 3035e141d999STejun Heo * to set nsect/lbal after reset, so don't waste too 3036e141d999STejun Heo * much time on it. We're gonna wait for !BSY anyway. 3037e141d999STejun Heo */ 3038e141d999STejun Heo for (i = 0; i < 2; i++) { 3039e141d999STejun Heo u8 nsect, lbal; 3040e141d999STejun Heo 30410d5ff566STejun Heo nsect = ioread8(ioaddr->nsect_addr); 30420d5ff566STejun Heo lbal = ioread8(ioaddr->lbal_addr); 3043c6fd2807SJeff Garzik if ((nsect == 1) && (lbal == 1)) 3044c6fd2807SJeff Garzik break; 3045c6fd2807SJeff Garzik msleep(50); /* give drive a breather */ 3046c6fd2807SJeff Garzik } 3047e141d999STejun Heo 3048d4b2bab4STejun Heo rc = ata_wait_ready(ap, deadline); 30499b89391cSTejun Heo if (rc) { 30509b89391cSTejun Heo if (rc != -ENODEV) 3051d4b2bab4STejun Heo return rc; 30529b89391cSTejun Heo ret = rc; 30539b89391cSTejun Heo } 3054d4b2bab4STejun Heo } 3055c6fd2807SJeff Garzik 3056c6fd2807SJeff Garzik /* is all this really necessary? */ 3057c6fd2807SJeff Garzik ap->ops->dev_select(ap, 0); 3058c6fd2807SJeff Garzik if (dev1) 3059c6fd2807SJeff Garzik ap->ops->dev_select(ap, 1); 3060c6fd2807SJeff Garzik if (dev0) 3061c6fd2807SJeff Garzik ap->ops->dev_select(ap, 0); 3062d4b2bab4STejun Heo 30639b89391cSTejun Heo return ret; 3064c6fd2807SJeff Garzik } 3065c6fd2807SJeff Garzik 3066d4b2bab4STejun Heo static int ata_bus_softreset(struct ata_port *ap, unsigned int devmask, 3067d4b2bab4STejun Heo unsigned long deadline) 3068c6fd2807SJeff Garzik { 3069c6fd2807SJeff Garzik struct ata_ioports *ioaddr = &ap->ioaddr; 3070c6fd2807SJeff Garzik 307144877b4eSTejun Heo DPRINTK("ata%u: bus reset via SRST\n", ap->print_id); 3072c6fd2807SJeff Garzik 3073c6fd2807SJeff Garzik /* software reset. causes dev0 to be selected */ 30740d5ff566STejun Heo iowrite8(ap->ctl, ioaddr->ctl_addr); 3075c6fd2807SJeff Garzik udelay(20); /* FIXME: flush */ 30760d5ff566STejun Heo iowrite8(ap->ctl | ATA_SRST, ioaddr->ctl_addr); 3077c6fd2807SJeff Garzik udelay(20); /* FIXME: flush */ 30780d5ff566STejun Heo iowrite8(ap->ctl, ioaddr->ctl_addr); 3079c6fd2807SJeff Garzik 3080c6fd2807SJeff Garzik /* spec mandates ">= 2ms" before checking status. 3081c6fd2807SJeff Garzik * We wait 150ms, because that was the magic delay used for 3082c6fd2807SJeff Garzik * ATAPI devices in Hale Landis's ATADRVR, for the period of time 3083c6fd2807SJeff Garzik * between when the ATA command register is written, and then 3084c6fd2807SJeff Garzik * status is checked. Because waiting for "a while" before 3085c6fd2807SJeff Garzik * checking status is fine, post SRST, we perform this magic 3086c6fd2807SJeff Garzik * delay here as well. 3087c6fd2807SJeff Garzik * 3088c6fd2807SJeff Garzik * Old drivers/ide uses the 2mS rule and then waits for ready 3089c6fd2807SJeff Garzik */ 3090c6fd2807SJeff Garzik msleep(150); 3091c6fd2807SJeff Garzik 3092c6fd2807SJeff Garzik /* Before we perform post reset processing we want to see if 3093c6fd2807SJeff Garzik * the bus shows 0xFF because the odd clown forgets the D7 3094c6fd2807SJeff Garzik * pulldown resistor. 3095c6fd2807SJeff Garzik */ 3096d1adc1bbSTejun Heo if (ata_check_status(ap) == 0xFF) 30979b89391cSTejun Heo return -ENODEV; 3098c6fd2807SJeff Garzik 3099d4b2bab4STejun Heo return ata_bus_post_reset(ap, devmask, deadline); 3100c6fd2807SJeff Garzik } 3101c6fd2807SJeff Garzik 3102c6fd2807SJeff Garzik /** 3103c6fd2807SJeff Garzik * ata_bus_reset - reset host port and associated ATA channel 3104c6fd2807SJeff Garzik * @ap: port to reset 3105c6fd2807SJeff Garzik * 3106c6fd2807SJeff Garzik * This is typically the first time we actually start issuing 3107c6fd2807SJeff Garzik * commands to the ATA channel. We wait for BSY to clear, then 3108c6fd2807SJeff Garzik * issue EXECUTE DEVICE DIAGNOSTIC command, polling for its 3109c6fd2807SJeff Garzik * result. Determine what devices, if any, are on the channel 3110c6fd2807SJeff Garzik * by looking at the device 0/1 error register. Look at the signature 3111c6fd2807SJeff Garzik * stored in each device's taskfile registers, to determine if 3112c6fd2807SJeff Garzik * the device is ATA or ATAPI. 3113c6fd2807SJeff Garzik * 3114c6fd2807SJeff Garzik * LOCKING: 3115c6fd2807SJeff Garzik * PCI/etc. bus probe sem. 3116cca3974eSJeff Garzik * Obtains host lock. 3117c6fd2807SJeff Garzik * 3118c6fd2807SJeff Garzik * SIDE EFFECTS: 3119c6fd2807SJeff Garzik * Sets ATA_FLAG_DISABLED if bus reset fails. 3120c6fd2807SJeff Garzik */ 3121c6fd2807SJeff Garzik 3122c6fd2807SJeff Garzik void ata_bus_reset(struct ata_port *ap) 3123c6fd2807SJeff Garzik { 3124c6fd2807SJeff Garzik struct ata_ioports *ioaddr = &ap->ioaddr; 3125c6fd2807SJeff Garzik unsigned int slave_possible = ap->flags & ATA_FLAG_SLAVE_POSS; 3126c6fd2807SJeff Garzik u8 err; 3127c6fd2807SJeff Garzik unsigned int dev0, dev1 = 0, devmask = 0; 31289b89391cSTejun Heo int rc; 3129c6fd2807SJeff Garzik 313044877b4eSTejun Heo DPRINTK("ENTER, host %u, port %u\n", ap->print_id, ap->port_no); 3131c6fd2807SJeff Garzik 3132c6fd2807SJeff Garzik /* determine if device 0/1 are present */ 3133c6fd2807SJeff Garzik if (ap->flags & ATA_FLAG_SATA_RESET) 3134c6fd2807SJeff Garzik dev0 = 1; 3135c6fd2807SJeff Garzik else { 3136c6fd2807SJeff Garzik dev0 = ata_devchk(ap, 0); 3137c6fd2807SJeff Garzik if (slave_possible) 3138c6fd2807SJeff Garzik dev1 = ata_devchk(ap, 1); 3139c6fd2807SJeff Garzik } 3140c6fd2807SJeff Garzik 3141c6fd2807SJeff Garzik if (dev0) 3142c6fd2807SJeff Garzik devmask |= (1 << 0); 3143c6fd2807SJeff Garzik if (dev1) 3144c6fd2807SJeff Garzik devmask |= (1 << 1); 3145c6fd2807SJeff Garzik 3146c6fd2807SJeff Garzik /* select device 0 again */ 3147c6fd2807SJeff Garzik ap->ops->dev_select(ap, 0); 3148c6fd2807SJeff Garzik 3149c6fd2807SJeff Garzik /* issue bus reset */ 31509b89391cSTejun Heo if (ap->flags & ATA_FLAG_SRST) { 31519b89391cSTejun Heo rc = ata_bus_softreset(ap, devmask, jiffies + 40 * HZ); 31529b89391cSTejun Heo if (rc && rc != -ENODEV) 3153c6fd2807SJeff Garzik goto err_out; 31549b89391cSTejun Heo } 3155c6fd2807SJeff Garzik 3156c6fd2807SJeff Garzik /* 3157c6fd2807SJeff Garzik * determine by signature whether we have ATA or ATAPI devices 3158c6fd2807SJeff Garzik */ 3159c6fd2807SJeff Garzik ap->device[0].class = ata_dev_try_classify(ap, 0, &err); 3160c6fd2807SJeff Garzik if ((slave_possible) && (err != 0x81)) 3161c6fd2807SJeff Garzik ap->device[1].class = ata_dev_try_classify(ap, 1, &err); 3162c6fd2807SJeff Garzik 3163c6fd2807SJeff Garzik /* re-enable interrupts */ 316483625006SAkira Iguchi ap->ops->irq_on(ap); 3165c6fd2807SJeff Garzik 3166c6fd2807SJeff Garzik /* is double-select really necessary? */ 3167c6fd2807SJeff Garzik if (ap->device[1].class != ATA_DEV_NONE) 3168c6fd2807SJeff Garzik ap->ops->dev_select(ap, 1); 3169c6fd2807SJeff Garzik if (ap->device[0].class != ATA_DEV_NONE) 3170c6fd2807SJeff Garzik ap->ops->dev_select(ap, 0); 3171c6fd2807SJeff Garzik 3172c6fd2807SJeff Garzik /* if no devices were detected, disable this port */ 3173c6fd2807SJeff Garzik if ((ap->device[0].class == ATA_DEV_NONE) && 3174c6fd2807SJeff Garzik (ap->device[1].class == ATA_DEV_NONE)) 3175c6fd2807SJeff Garzik goto err_out; 3176c6fd2807SJeff Garzik 3177c6fd2807SJeff Garzik if (ap->flags & (ATA_FLAG_SATA_RESET | ATA_FLAG_SRST)) { 3178c6fd2807SJeff Garzik /* set up device control for ATA_FLAG_SATA_RESET */ 31790d5ff566STejun Heo iowrite8(ap->ctl, ioaddr->ctl_addr); 3180c6fd2807SJeff Garzik } 3181c6fd2807SJeff Garzik 3182c6fd2807SJeff Garzik DPRINTK("EXIT\n"); 3183c6fd2807SJeff Garzik return; 3184c6fd2807SJeff Garzik 3185c6fd2807SJeff Garzik err_out: 3186c6fd2807SJeff Garzik ata_port_printk(ap, KERN_ERR, "disabling port\n"); 3187c6fd2807SJeff Garzik ap->ops->port_disable(ap); 3188c6fd2807SJeff Garzik 3189c6fd2807SJeff Garzik DPRINTK("EXIT\n"); 3190c6fd2807SJeff Garzik } 3191c6fd2807SJeff Garzik 3192c6fd2807SJeff Garzik /** 3193c6fd2807SJeff Garzik * sata_phy_debounce - debounce SATA phy status 3194c6fd2807SJeff Garzik * @ap: ATA port to debounce SATA phy status for 3195c6fd2807SJeff Garzik * @params: timing parameters { interval, duratinon, timeout } in msec 3196d4b2bab4STejun Heo * @deadline: deadline jiffies for the operation 3197c6fd2807SJeff Garzik * 3198c6fd2807SJeff Garzik * Make sure SStatus of @ap reaches stable state, determined by 3199c6fd2807SJeff Garzik * holding the same value where DET is not 1 for @duration polled 3200c6fd2807SJeff Garzik * every @interval, before @timeout. Timeout constraints the 3201d4b2bab4STejun Heo * beginning of the stable state. Because DET gets stuck at 1 on 3202d4b2bab4STejun Heo * some controllers after hot unplugging, this functions waits 3203c6fd2807SJeff Garzik * until timeout then returns 0 if DET is stable at 1. 3204c6fd2807SJeff Garzik * 3205d4b2bab4STejun Heo * @timeout is further limited by @deadline. The sooner of the 3206d4b2bab4STejun Heo * two is used. 3207d4b2bab4STejun Heo * 3208c6fd2807SJeff Garzik * LOCKING: 3209c6fd2807SJeff Garzik * Kernel thread context (may sleep) 3210c6fd2807SJeff Garzik * 3211c6fd2807SJeff Garzik * RETURNS: 3212c6fd2807SJeff Garzik * 0 on success, -errno on failure. 3213c6fd2807SJeff Garzik */ 3214d4b2bab4STejun Heo int sata_phy_debounce(struct ata_port *ap, const unsigned long *params, 3215d4b2bab4STejun Heo unsigned long deadline) 3216c6fd2807SJeff Garzik { 3217c6fd2807SJeff Garzik unsigned long interval_msec = params[0]; 3218d4b2bab4STejun Heo unsigned long duration = msecs_to_jiffies(params[1]); 3219d4b2bab4STejun Heo unsigned long last_jiffies, t; 3220c6fd2807SJeff Garzik u32 last, cur; 3221c6fd2807SJeff Garzik int rc; 3222c6fd2807SJeff Garzik 3223d4b2bab4STejun Heo t = jiffies + msecs_to_jiffies(params[2]); 3224d4b2bab4STejun Heo if (time_before(t, deadline)) 3225d4b2bab4STejun Heo deadline = t; 3226d4b2bab4STejun Heo 3227c6fd2807SJeff Garzik if ((rc = sata_scr_read(ap, SCR_STATUS, &cur))) 3228c6fd2807SJeff Garzik return rc; 3229c6fd2807SJeff Garzik cur &= 0xf; 3230c6fd2807SJeff Garzik 3231c6fd2807SJeff Garzik last = cur; 3232c6fd2807SJeff Garzik last_jiffies = jiffies; 3233c6fd2807SJeff Garzik 3234c6fd2807SJeff Garzik while (1) { 3235c6fd2807SJeff Garzik msleep(interval_msec); 3236c6fd2807SJeff Garzik if ((rc = sata_scr_read(ap, SCR_STATUS, &cur))) 3237c6fd2807SJeff Garzik return rc; 3238c6fd2807SJeff Garzik cur &= 0xf; 3239c6fd2807SJeff Garzik 3240c6fd2807SJeff Garzik /* DET stable? */ 3241c6fd2807SJeff Garzik if (cur == last) { 3242d4b2bab4STejun Heo if (cur == 1 && time_before(jiffies, deadline)) 3243c6fd2807SJeff Garzik continue; 3244c6fd2807SJeff Garzik if (time_after(jiffies, last_jiffies + duration)) 3245c6fd2807SJeff Garzik return 0; 3246c6fd2807SJeff Garzik continue; 3247c6fd2807SJeff Garzik } 3248c6fd2807SJeff Garzik 3249c6fd2807SJeff Garzik /* unstable, start over */ 3250c6fd2807SJeff Garzik last = cur; 3251c6fd2807SJeff Garzik last_jiffies = jiffies; 3252c6fd2807SJeff Garzik 3253d4b2bab4STejun Heo /* check deadline */ 3254d4b2bab4STejun Heo if (time_after(jiffies, deadline)) 3255c6fd2807SJeff Garzik return -EBUSY; 3256c6fd2807SJeff Garzik } 3257c6fd2807SJeff Garzik } 3258c6fd2807SJeff Garzik 3259c6fd2807SJeff Garzik /** 3260c6fd2807SJeff Garzik * sata_phy_resume - resume SATA phy 3261c6fd2807SJeff Garzik * @ap: ATA port to resume SATA phy for 3262c6fd2807SJeff Garzik * @params: timing parameters { interval, duratinon, timeout } in msec 3263d4b2bab4STejun Heo * @deadline: deadline jiffies for the operation 3264c6fd2807SJeff Garzik * 3265c6fd2807SJeff Garzik * Resume SATA phy of @ap and debounce it. 3266c6fd2807SJeff Garzik * 3267c6fd2807SJeff Garzik * LOCKING: 3268c6fd2807SJeff Garzik * Kernel thread context (may sleep) 3269c6fd2807SJeff Garzik * 3270c6fd2807SJeff Garzik * RETURNS: 3271c6fd2807SJeff Garzik * 0 on success, -errno on failure. 3272c6fd2807SJeff Garzik */ 3273d4b2bab4STejun Heo int sata_phy_resume(struct ata_port *ap, const unsigned long *params, 3274d4b2bab4STejun Heo unsigned long deadline) 3275c6fd2807SJeff Garzik { 3276c6fd2807SJeff Garzik u32 scontrol; 3277c6fd2807SJeff Garzik int rc; 3278c6fd2807SJeff Garzik 3279c6fd2807SJeff Garzik if ((rc = sata_scr_read(ap, SCR_CONTROL, &scontrol))) 3280c6fd2807SJeff Garzik return rc; 3281c6fd2807SJeff Garzik 3282c6fd2807SJeff Garzik scontrol = (scontrol & 0x0f0) | 0x300; 3283c6fd2807SJeff Garzik 3284c6fd2807SJeff Garzik if ((rc = sata_scr_write(ap, SCR_CONTROL, scontrol))) 3285c6fd2807SJeff Garzik return rc; 3286c6fd2807SJeff Garzik 3287c6fd2807SJeff Garzik /* Some PHYs react badly if SStatus is pounded immediately 3288c6fd2807SJeff Garzik * after resuming. Delay 200ms before debouncing. 3289c6fd2807SJeff Garzik */ 3290c6fd2807SJeff Garzik msleep(200); 3291c6fd2807SJeff Garzik 3292d4b2bab4STejun Heo return sata_phy_debounce(ap, params, deadline); 3293c6fd2807SJeff Garzik } 3294c6fd2807SJeff Garzik 3295c6fd2807SJeff Garzik /** 3296c6fd2807SJeff Garzik * ata_std_prereset - prepare for reset 3297c6fd2807SJeff Garzik * @ap: ATA port to be reset 3298d4b2bab4STejun Heo * @deadline: deadline jiffies for the operation 3299c6fd2807SJeff Garzik * 3300b8cffc6aSTejun Heo * @ap is about to be reset. Initialize it. Failure from 3301b8cffc6aSTejun Heo * prereset makes libata abort whole reset sequence and give up 3302b8cffc6aSTejun Heo * that port, so prereset should be best-effort. It does its 3303b8cffc6aSTejun Heo * best to prepare for reset sequence but if things go wrong, it 3304b8cffc6aSTejun Heo * should just whine, not fail. 3305c6fd2807SJeff Garzik * 3306c6fd2807SJeff Garzik * LOCKING: 3307c6fd2807SJeff Garzik * Kernel thread context (may sleep) 3308c6fd2807SJeff Garzik * 3309c6fd2807SJeff Garzik * RETURNS: 3310c6fd2807SJeff Garzik * 0 on success, -errno otherwise. 3311c6fd2807SJeff Garzik */ 3312d4b2bab4STejun Heo int ata_std_prereset(struct ata_port *ap, unsigned long deadline) 3313c6fd2807SJeff Garzik { 3314c6fd2807SJeff Garzik struct ata_eh_context *ehc = &ap->eh_context; 3315c6fd2807SJeff Garzik const unsigned long *timing = sata_ehc_deb_timing(ehc); 3316c6fd2807SJeff Garzik int rc; 3317c6fd2807SJeff Garzik 331831daabdaSTejun Heo /* handle link resume */ 3319c6fd2807SJeff Garzik if ((ehc->i.flags & ATA_EHI_RESUME_LINK) && 3320c6fd2807SJeff Garzik (ap->flags & ATA_FLAG_HRST_TO_RESUME)) 3321c6fd2807SJeff Garzik ehc->i.action |= ATA_EH_HARDRESET; 3322c6fd2807SJeff Garzik 3323c6fd2807SJeff Garzik /* if we're about to do hardreset, nothing more to do */ 3324c6fd2807SJeff Garzik if (ehc->i.action & ATA_EH_HARDRESET) 3325c6fd2807SJeff Garzik return 0; 3326c6fd2807SJeff Garzik 3327c6fd2807SJeff Garzik /* if SATA, resume phy */ 3328a16abc0bSTejun Heo if (ap->flags & ATA_FLAG_SATA) { 3329d4b2bab4STejun Heo rc = sata_phy_resume(ap, timing, deadline); 3330b8cffc6aSTejun Heo /* whine about phy resume failure but proceed */ 3331b8cffc6aSTejun Heo if (rc && rc != -EOPNOTSUPP) 3332c6fd2807SJeff Garzik ata_port_printk(ap, KERN_WARNING, "failed to resume " 3333c6fd2807SJeff Garzik "link for reset (errno=%d)\n", rc); 3334c6fd2807SJeff Garzik } 3335c6fd2807SJeff Garzik 3336c6fd2807SJeff Garzik /* Wait for !BSY if the controller can wait for the first D2H 3337c6fd2807SJeff Garzik * Reg FIS and we don't know that no device is attached. 3338c6fd2807SJeff Garzik */ 3339b8cffc6aSTejun Heo if (!(ap->flags & ATA_FLAG_SKIP_D2H_BSY) && !ata_port_offline(ap)) { 3340b8cffc6aSTejun Heo rc = ata_wait_ready(ap, deadline); 33416dffaf61STejun Heo if (rc && rc != -ENODEV) { 3342b8cffc6aSTejun Heo ata_port_printk(ap, KERN_WARNING, "device not ready " 3343b8cffc6aSTejun Heo "(errno=%d), forcing hardreset\n", rc); 3344b8cffc6aSTejun Heo ehc->i.action |= ATA_EH_HARDRESET; 3345b8cffc6aSTejun Heo } 3346b8cffc6aSTejun Heo } 3347c6fd2807SJeff Garzik 3348c6fd2807SJeff Garzik return 0; 3349c6fd2807SJeff Garzik } 3350c6fd2807SJeff Garzik 3351c6fd2807SJeff Garzik /** 3352c6fd2807SJeff Garzik * ata_std_softreset - reset host port via ATA SRST 3353c6fd2807SJeff Garzik * @ap: port to reset 3354c6fd2807SJeff Garzik * @classes: resulting classes of attached devices 3355d4b2bab4STejun Heo * @deadline: deadline jiffies for the operation 3356c6fd2807SJeff Garzik * 3357c6fd2807SJeff Garzik * Reset host port using ATA SRST. 3358c6fd2807SJeff Garzik * 3359c6fd2807SJeff Garzik * LOCKING: 3360c6fd2807SJeff Garzik * Kernel thread context (may sleep) 3361c6fd2807SJeff Garzik * 3362c6fd2807SJeff Garzik * RETURNS: 3363c6fd2807SJeff Garzik * 0 on success, -errno otherwise. 3364c6fd2807SJeff Garzik */ 3365d4b2bab4STejun Heo int ata_std_softreset(struct ata_port *ap, unsigned int *classes, 3366d4b2bab4STejun Heo unsigned long deadline) 3367c6fd2807SJeff Garzik { 3368c6fd2807SJeff Garzik unsigned int slave_possible = ap->flags & ATA_FLAG_SLAVE_POSS; 3369d4b2bab4STejun Heo unsigned int devmask = 0; 3370d4b2bab4STejun Heo int rc; 3371c6fd2807SJeff Garzik u8 err; 3372c6fd2807SJeff Garzik 3373c6fd2807SJeff Garzik DPRINTK("ENTER\n"); 3374c6fd2807SJeff Garzik 3375c6fd2807SJeff Garzik if (ata_port_offline(ap)) { 3376c6fd2807SJeff Garzik classes[0] = ATA_DEV_NONE; 3377c6fd2807SJeff Garzik goto out; 3378c6fd2807SJeff Garzik } 3379c6fd2807SJeff Garzik 3380c6fd2807SJeff Garzik /* determine if device 0/1 are present */ 3381c6fd2807SJeff Garzik if (ata_devchk(ap, 0)) 3382c6fd2807SJeff Garzik devmask |= (1 << 0); 3383c6fd2807SJeff Garzik if (slave_possible && ata_devchk(ap, 1)) 3384c6fd2807SJeff Garzik devmask |= (1 << 1); 3385c6fd2807SJeff Garzik 3386c6fd2807SJeff Garzik /* select device 0 again */ 3387c6fd2807SJeff Garzik ap->ops->dev_select(ap, 0); 3388c6fd2807SJeff Garzik 3389c6fd2807SJeff Garzik /* issue bus reset */ 3390c6fd2807SJeff Garzik DPRINTK("about to softreset, devmask=%x\n", devmask); 3391d4b2bab4STejun Heo rc = ata_bus_softreset(ap, devmask, deadline); 33929b89391cSTejun Heo /* if link is occupied, -ENODEV too is an error */ 33939b89391cSTejun Heo if (rc && (rc != -ENODEV || sata_scr_valid(ap))) { 3394d4b2bab4STejun Heo ata_port_printk(ap, KERN_ERR, "SRST failed (errno=%d)\n", rc); 3395d4b2bab4STejun Heo return rc; 3396c6fd2807SJeff Garzik } 3397c6fd2807SJeff Garzik 3398c6fd2807SJeff Garzik /* determine by signature whether we have ATA or ATAPI devices */ 3399c6fd2807SJeff Garzik classes[0] = ata_dev_try_classify(ap, 0, &err); 3400c6fd2807SJeff Garzik if (slave_possible && err != 0x81) 3401c6fd2807SJeff Garzik classes[1] = ata_dev_try_classify(ap, 1, &err); 3402c6fd2807SJeff Garzik 3403c6fd2807SJeff Garzik out: 3404c6fd2807SJeff Garzik DPRINTK("EXIT, classes[0]=%u [1]=%u\n", classes[0], classes[1]); 3405c6fd2807SJeff Garzik return 0; 3406c6fd2807SJeff Garzik } 3407c6fd2807SJeff Garzik 3408c6fd2807SJeff Garzik /** 3409b6103f6dSTejun Heo * sata_port_hardreset - reset port via SATA phy reset 3410c6fd2807SJeff Garzik * @ap: port to reset 3411b6103f6dSTejun Heo * @timing: timing parameters { interval, duratinon, timeout } in msec 3412d4b2bab4STejun Heo * @deadline: deadline jiffies for the operation 3413c6fd2807SJeff Garzik * 3414c6fd2807SJeff Garzik * SATA phy-reset host port using DET bits of SControl register. 3415c6fd2807SJeff Garzik * 3416c6fd2807SJeff Garzik * LOCKING: 3417c6fd2807SJeff Garzik * Kernel thread context (may sleep) 3418c6fd2807SJeff Garzik * 3419c6fd2807SJeff Garzik * RETURNS: 3420c6fd2807SJeff Garzik * 0 on success, -errno otherwise. 3421c6fd2807SJeff Garzik */ 3422d4b2bab4STejun Heo int sata_port_hardreset(struct ata_port *ap, const unsigned long *timing, 3423d4b2bab4STejun Heo unsigned long deadline) 3424c6fd2807SJeff Garzik { 3425c6fd2807SJeff Garzik u32 scontrol; 3426c6fd2807SJeff Garzik int rc; 3427c6fd2807SJeff Garzik 3428c6fd2807SJeff Garzik DPRINTK("ENTER\n"); 3429c6fd2807SJeff Garzik 3430c6fd2807SJeff Garzik if (sata_set_spd_needed(ap)) { 3431c6fd2807SJeff Garzik /* SATA spec says nothing about how to reconfigure 3432c6fd2807SJeff Garzik * spd. To be on the safe side, turn off phy during 3433c6fd2807SJeff Garzik * reconfiguration. This works for at least ICH7 AHCI 3434c6fd2807SJeff Garzik * and Sil3124. 3435c6fd2807SJeff Garzik */ 3436c6fd2807SJeff Garzik if ((rc = sata_scr_read(ap, SCR_CONTROL, &scontrol))) 3437b6103f6dSTejun Heo goto out; 3438c6fd2807SJeff Garzik 3439cea0d336SJeff Garzik scontrol = (scontrol & 0x0f0) | 0x304; 3440c6fd2807SJeff Garzik 3441c6fd2807SJeff Garzik if ((rc = sata_scr_write(ap, SCR_CONTROL, scontrol))) 3442b6103f6dSTejun Heo goto out; 3443c6fd2807SJeff Garzik 3444c6fd2807SJeff Garzik sata_set_spd(ap); 3445c6fd2807SJeff Garzik } 3446c6fd2807SJeff Garzik 3447c6fd2807SJeff Garzik /* issue phy wake/reset */ 3448c6fd2807SJeff Garzik if ((rc = sata_scr_read(ap, SCR_CONTROL, &scontrol))) 3449b6103f6dSTejun Heo goto out; 3450c6fd2807SJeff Garzik 3451c6fd2807SJeff Garzik scontrol = (scontrol & 0x0f0) | 0x301; 3452c6fd2807SJeff Garzik 3453c6fd2807SJeff Garzik if ((rc = sata_scr_write_flush(ap, SCR_CONTROL, scontrol))) 3454b6103f6dSTejun Heo goto out; 3455c6fd2807SJeff Garzik 3456c6fd2807SJeff Garzik /* Couldn't find anything in SATA I/II specs, but AHCI-1.1 3457c6fd2807SJeff Garzik * 10.4.2 says at least 1 ms. 3458c6fd2807SJeff Garzik */ 3459c6fd2807SJeff Garzik msleep(1); 3460c6fd2807SJeff Garzik 3461c6fd2807SJeff Garzik /* bring phy back */ 3462d4b2bab4STejun Heo rc = sata_phy_resume(ap, timing, deadline); 3463b6103f6dSTejun Heo out: 3464b6103f6dSTejun Heo DPRINTK("EXIT, rc=%d\n", rc); 3465b6103f6dSTejun Heo return rc; 3466b6103f6dSTejun Heo } 3467b6103f6dSTejun Heo 3468b6103f6dSTejun Heo /** 3469b6103f6dSTejun Heo * sata_std_hardreset - reset host port via SATA phy reset 3470b6103f6dSTejun Heo * @ap: port to reset 3471b6103f6dSTejun Heo * @class: resulting class of attached device 3472d4b2bab4STejun Heo * @deadline: deadline jiffies for the operation 3473b6103f6dSTejun Heo * 3474b6103f6dSTejun Heo * SATA phy-reset host port using DET bits of SControl register, 3475b6103f6dSTejun Heo * wait for !BSY and classify the attached device. 3476b6103f6dSTejun Heo * 3477b6103f6dSTejun Heo * LOCKING: 3478b6103f6dSTejun Heo * Kernel thread context (may sleep) 3479b6103f6dSTejun Heo * 3480b6103f6dSTejun Heo * RETURNS: 3481b6103f6dSTejun Heo * 0 on success, -errno otherwise. 3482b6103f6dSTejun Heo */ 3483d4b2bab4STejun Heo int sata_std_hardreset(struct ata_port *ap, unsigned int *class, 3484d4b2bab4STejun Heo unsigned long deadline) 3485b6103f6dSTejun Heo { 3486b6103f6dSTejun Heo const unsigned long *timing = sata_ehc_deb_timing(&ap->eh_context); 3487b6103f6dSTejun Heo int rc; 3488b6103f6dSTejun Heo 3489b6103f6dSTejun Heo DPRINTK("ENTER\n"); 3490b6103f6dSTejun Heo 3491b6103f6dSTejun Heo /* do hardreset */ 3492d4b2bab4STejun Heo rc = sata_port_hardreset(ap, timing, deadline); 3493b6103f6dSTejun Heo if (rc) { 3494b6103f6dSTejun Heo ata_port_printk(ap, KERN_ERR, 3495b6103f6dSTejun Heo "COMRESET failed (errno=%d)\n", rc); 3496b6103f6dSTejun Heo return rc; 3497b6103f6dSTejun Heo } 3498c6fd2807SJeff Garzik 3499c6fd2807SJeff Garzik /* TODO: phy layer with polling, timeouts, etc. */ 3500c6fd2807SJeff Garzik if (ata_port_offline(ap)) { 3501c6fd2807SJeff Garzik *class = ATA_DEV_NONE; 3502c6fd2807SJeff Garzik DPRINTK("EXIT, link offline\n"); 3503c6fd2807SJeff Garzik return 0; 3504c6fd2807SJeff Garzik } 3505c6fd2807SJeff Garzik 350634fee227STejun Heo /* wait a while before checking status, see SRST for more info */ 350734fee227STejun Heo msleep(150); 350834fee227STejun Heo 3509d4b2bab4STejun Heo rc = ata_wait_ready(ap, deadline); 35109b89391cSTejun Heo /* link occupied, -ENODEV too is an error */ 35119b89391cSTejun Heo if (rc) { 3512c6fd2807SJeff Garzik ata_port_printk(ap, KERN_ERR, 3513d4b2bab4STejun Heo "COMRESET failed (errno=%d)\n", rc); 3514d4b2bab4STejun Heo return rc; 3515c6fd2807SJeff Garzik } 3516c6fd2807SJeff Garzik 3517c6fd2807SJeff Garzik ap->ops->dev_select(ap, 0); /* probably unnecessary */ 3518c6fd2807SJeff Garzik 3519c6fd2807SJeff Garzik *class = ata_dev_try_classify(ap, 0, NULL); 3520c6fd2807SJeff Garzik 3521c6fd2807SJeff Garzik DPRINTK("EXIT, class=%u\n", *class); 3522c6fd2807SJeff Garzik return 0; 3523c6fd2807SJeff Garzik } 3524c6fd2807SJeff Garzik 3525c6fd2807SJeff Garzik /** 3526c6fd2807SJeff Garzik * ata_std_postreset - standard postreset callback 3527c6fd2807SJeff Garzik * @ap: the target ata_port 3528c6fd2807SJeff Garzik * @classes: classes of attached devices 3529c6fd2807SJeff Garzik * 3530c6fd2807SJeff Garzik * This function is invoked after a successful reset. Note that 3531c6fd2807SJeff Garzik * the device might have been reset more than once using 3532c6fd2807SJeff Garzik * different reset methods before postreset is invoked. 3533c6fd2807SJeff Garzik * 3534c6fd2807SJeff Garzik * LOCKING: 3535c6fd2807SJeff Garzik * Kernel thread context (may sleep) 3536c6fd2807SJeff Garzik */ 3537c6fd2807SJeff Garzik void ata_std_postreset(struct ata_port *ap, unsigned int *classes) 3538c6fd2807SJeff Garzik { 3539c6fd2807SJeff Garzik u32 serror; 3540c6fd2807SJeff Garzik 3541c6fd2807SJeff Garzik DPRINTK("ENTER\n"); 3542c6fd2807SJeff Garzik 3543c6fd2807SJeff Garzik /* print link status */ 3544c6fd2807SJeff Garzik sata_print_link_status(ap); 3545c6fd2807SJeff Garzik 3546c6fd2807SJeff Garzik /* clear SError */ 3547c6fd2807SJeff Garzik if (sata_scr_read(ap, SCR_ERROR, &serror) == 0) 3548c6fd2807SJeff Garzik sata_scr_write(ap, SCR_ERROR, serror); 3549c6fd2807SJeff Garzik 3550c6fd2807SJeff Garzik /* re-enable interrupts */ 355183625006SAkira Iguchi if (!ap->ops->error_handler) 355283625006SAkira Iguchi ap->ops->irq_on(ap); 3553c6fd2807SJeff Garzik 3554c6fd2807SJeff Garzik /* is double-select really necessary? */ 3555c6fd2807SJeff Garzik if (classes[0] != ATA_DEV_NONE) 3556c6fd2807SJeff Garzik ap->ops->dev_select(ap, 1); 3557c6fd2807SJeff Garzik if (classes[1] != ATA_DEV_NONE) 3558c6fd2807SJeff Garzik ap->ops->dev_select(ap, 0); 3559c6fd2807SJeff Garzik 3560c6fd2807SJeff Garzik /* bail out if no device is present */ 3561c6fd2807SJeff Garzik if (classes[0] == ATA_DEV_NONE && classes[1] == ATA_DEV_NONE) { 3562c6fd2807SJeff Garzik DPRINTK("EXIT, no device\n"); 3563c6fd2807SJeff Garzik return; 3564c6fd2807SJeff Garzik } 3565c6fd2807SJeff Garzik 3566c6fd2807SJeff Garzik /* set up device control */ 35670d5ff566STejun Heo if (ap->ioaddr.ctl_addr) 35680d5ff566STejun Heo iowrite8(ap->ctl, ap->ioaddr.ctl_addr); 3569c6fd2807SJeff Garzik 3570c6fd2807SJeff Garzik DPRINTK("EXIT\n"); 3571c6fd2807SJeff Garzik } 3572c6fd2807SJeff Garzik 3573c6fd2807SJeff Garzik /** 3574c6fd2807SJeff Garzik * ata_dev_same_device - Determine whether new ID matches configured device 3575c6fd2807SJeff Garzik * @dev: device to compare against 3576c6fd2807SJeff Garzik * @new_class: class of the new device 3577c6fd2807SJeff Garzik * @new_id: IDENTIFY page of the new device 3578c6fd2807SJeff Garzik * 3579c6fd2807SJeff Garzik * Compare @new_class and @new_id against @dev and determine 3580c6fd2807SJeff Garzik * whether @dev is the device indicated by @new_class and 3581c6fd2807SJeff Garzik * @new_id. 3582c6fd2807SJeff Garzik * 3583c6fd2807SJeff Garzik * LOCKING: 3584c6fd2807SJeff Garzik * None. 3585c6fd2807SJeff Garzik * 3586c6fd2807SJeff Garzik * RETURNS: 3587c6fd2807SJeff Garzik * 1 if @dev matches @new_class and @new_id, 0 otherwise. 3588c6fd2807SJeff Garzik */ 3589c6fd2807SJeff Garzik static int ata_dev_same_device(struct ata_device *dev, unsigned int new_class, 3590c6fd2807SJeff Garzik const u16 *new_id) 3591c6fd2807SJeff Garzik { 3592c6fd2807SJeff Garzik const u16 *old_id = dev->id; 3593a0cf733bSTejun Heo unsigned char model[2][ATA_ID_PROD_LEN + 1]; 3594a0cf733bSTejun Heo unsigned char serial[2][ATA_ID_SERNO_LEN + 1]; 3595c6fd2807SJeff Garzik 3596c6fd2807SJeff Garzik if (dev->class != new_class) { 3597c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_INFO, "class mismatch %d != %d\n", 3598c6fd2807SJeff Garzik dev->class, new_class); 3599c6fd2807SJeff Garzik return 0; 3600c6fd2807SJeff Garzik } 3601c6fd2807SJeff Garzik 3602a0cf733bSTejun Heo ata_id_c_string(old_id, model[0], ATA_ID_PROD, sizeof(model[0])); 3603a0cf733bSTejun Heo ata_id_c_string(new_id, model[1], ATA_ID_PROD, sizeof(model[1])); 3604a0cf733bSTejun Heo ata_id_c_string(old_id, serial[0], ATA_ID_SERNO, sizeof(serial[0])); 3605a0cf733bSTejun Heo ata_id_c_string(new_id, serial[1], ATA_ID_SERNO, sizeof(serial[1])); 3606c6fd2807SJeff Garzik 3607c6fd2807SJeff Garzik if (strcmp(model[0], model[1])) { 3608c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_INFO, "model number mismatch " 3609c6fd2807SJeff Garzik "'%s' != '%s'\n", model[0], model[1]); 3610c6fd2807SJeff Garzik return 0; 3611c6fd2807SJeff Garzik } 3612c6fd2807SJeff Garzik 3613c6fd2807SJeff Garzik if (strcmp(serial[0], serial[1])) { 3614c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_INFO, "serial number mismatch " 3615c6fd2807SJeff Garzik "'%s' != '%s'\n", serial[0], serial[1]); 3616c6fd2807SJeff Garzik return 0; 3617c6fd2807SJeff Garzik } 3618c6fd2807SJeff Garzik 3619c6fd2807SJeff Garzik return 1; 3620c6fd2807SJeff Garzik } 3621c6fd2807SJeff Garzik 3622c6fd2807SJeff Garzik /** 3623fe30911bSTejun Heo * ata_dev_reread_id - Re-read IDENTIFY data 36243fae450cSHenrik Kretzschmar * @dev: target ATA device 3625bff04647STejun Heo * @readid_flags: read ID flags 3626c6fd2807SJeff Garzik * 3627c6fd2807SJeff Garzik * Re-read IDENTIFY page and make sure @dev is still attached to 3628c6fd2807SJeff Garzik * the port. 3629c6fd2807SJeff Garzik * 3630c6fd2807SJeff Garzik * LOCKING: 3631c6fd2807SJeff Garzik * Kernel thread context (may sleep) 3632c6fd2807SJeff Garzik * 3633c6fd2807SJeff Garzik * RETURNS: 3634c6fd2807SJeff Garzik * 0 on success, negative errno otherwise 3635c6fd2807SJeff Garzik */ 3636fe30911bSTejun Heo int ata_dev_reread_id(struct ata_device *dev, unsigned int readid_flags) 3637c6fd2807SJeff Garzik { 3638c6fd2807SJeff Garzik unsigned int class = dev->class; 3639c6fd2807SJeff Garzik u16 *id = (void *)dev->ap->sector_buf; 3640c6fd2807SJeff Garzik int rc; 3641c6fd2807SJeff Garzik 3642c6fd2807SJeff Garzik /* read ID data */ 3643bff04647STejun Heo rc = ata_dev_read_id(dev, &class, readid_flags, id); 3644c6fd2807SJeff Garzik if (rc) 3645fe30911bSTejun Heo return rc; 3646c6fd2807SJeff Garzik 3647c6fd2807SJeff Garzik /* is the device still there? */ 3648fe30911bSTejun Heo if (!ata_dev_same_device(dev, class, id)) 3649fe30911bSTejun Heo return -ENODEV; 3650c6fd2807SJeff Garzik 3651c6fd2807SJeff Garzik memcpy(dev->id, id, sizeof(id[0]) * ATA_ID_WORDS); 3652fe30911bSTejun Heo return 0; 3653fe30911bSTejun Heo } 3654fe30911bSTejun Heo 3655fe30911bSTejun Heo /** 3656fe30911bSTejun Heo * ata_dev_revalidate - Revalidate ATA device 3657fe30911bSTejun Heo * @dev: device to revalidate 3658fe30911bSTejun Heo * @readid_flags: read ID flags 3659fe30911bSTejun Heo * 3660fe30911bSTejun Heo * Re-read IDENTIFY page, make sure @dev is still attached to the 3661fe30911bSTejun Heo * port and reconfigure it according to the new IDENTIFY page. 3662fe30911bSTejun Heo * 3663fe30911bSTejun Heo * LOCKING: 3664fe30911bSTejun Heo * Kernel thread context (may sleep) 3665fe30911bSTejun Heo * 3666fe30911bSTejun Heo * RETURNS: 3667fe30911bSTejun Heo * 0 on success, negative errno otherwise 3668fe30911bSTejun Heo */ 3669fe30911bSTejun Heo int ata_dev_revalidate(struct ata_device *dev, unsigned int readid_flags) 3670fe30911bSTejun Heo { 36716ddcd3b0STejun Heo u64 n_sectors = dev->n_sectors; 3672fe30911bSTejun Heo int rc; 3673fe30911bSTejun Heo 3674fe30911bSTejun Heo if (!ata_dev_enabled(dev)) 3675fe30911bSTejun Heo return -ENODEV; 3676fe30911bSTejun Heo 3677fe30911bSTejun Heo /* re-read ID */ 3678fe30911bSTejun Heo rc = ata_dev_reread_id(dev, readid_flags); 3679fe30911bSTejun Heo if (rc) 3680fe30911bSTejun Heo goto fail; 3681c6fd2807SJeff Garzik 3682c6fd2807SJeff Garzik /* configure device according to the new ID */ 3683efdaedc4STejun Heo rc = ata_dev_configure(dev); 36846ddcd3b0STejun Heo if (rc) 36856ddcd3b0STejun Heo goto fail; 36866ddcd3b0STejun Heo 36876ddcd3b0STejun Heo /* verify n_sectors hasn't changed */ 36886ddcd3b0STejun Heo if (dev->class == ATA_DEV_ATA && dev->n_sectors != n_sectors) { 36896ddcd3b0STejun Heo ata_dev_printk(dev, KERN_INFO, "n_sectors mismatch " 36906ddcd3b0STejun Heo "%llu != %llu\n", 36916ddcd3b0STejun Heo (unsigned long long)n_sectors, 36926ddcd3b0STejun Heo (unsigned long long)dev->n_sectors); 36936ddcd3b0STejun Heo rc = -ENODEV; 36946ddcd3b0STejun Heo goto fail; 36956ddcd3b0STejun Heo } 36966ddcd3b0STejun Heo 3697c6fd2807SJeff Garzik return 0; 3698c6fd2807SJeff Garzik 3699c6fd2807SJeff Garzik fail: 3700c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_ERR, "revalidation failed (errno=%d)\n", rc); 3701c6fd2807SJeff Garzik return rc; 3702c6fd2807SJeff Garzik } 3703c6fd2807SJeff Garzik 37046919a0a6SAlan Cox struct ata_blacklist_entry { 37056919a0a6SAlan Cox const char *model_num; 37066919a0a6SAlan Cox const char *model_rev; 37076919a0a6SAlan Cox unsigned long horkage; 37086919a0a6SAlan Cox }; 37096919a0a6SAlan Cox 37106919a0a6SAlan Cox static const struct ata_blacklist_entry ata_device_blacklist [] = { 37116919a0a6SAlan Cox /* Devices with DMA related problems under Linux */ 37126919a0a6SAlan Cox { "WDC AC11000H", NULL, ATA_HORKAGE_NODMA }, 37136919a0a6SAlan Cox { "WDC AC22100H", NULL, ATA_HORKAGE_NODMA }, 37146919a0a6SAlan Cox { "WDC AC32500H", NULL, ATA_HORKAGE_NODMA }, 37156919a0a6SAlan Cox { "WDC AC33100H", NULL, ATA_HORKAGE_NODMA }, 37166919a0a6SAlan Cox { "WDC AC31600H", NULL, ATA_HORKAGE_NODMA }, 37176919a0a6SAlan Cox { "WDC AC32100H", "24.09P07", ATA_HORKAGE_NODMA }, 37186919a0a6SAlan Cox { "WDC AC23200L", "21.10N21", ATA_HORKAGE_NODMA }, 37196919a0a6SAlan Cox { "Compaq CRD-8241B", NULL, ATA_HORKAGE_NODMA }, 37206919a0a6SAlan Cox { "CRD-8400B", NULL, ATA_HORKAGE_NODMA }, 37216919a0a6SAlan Cox { "CRD-8480B", NULL, ATA_HORKAGE_NODMA }, 37226919a0a6SAlan Cox { "CRD-8482B", NULL, ATA_HORKAGE_NODMA }, 37236919a0a6SAlan Cox { "CRD-84", NULL, ATA_HORKAGE_NODMA }, 37246919a0a6SAlan Cox { "SanDisk SDP3B", NULL, ATA_HORKAGE_NODMA }, 37256919a0a6SAlan Cox { "SanDisk SDP3B-64", NULL, ATA_HORKAGE_NODMA }, 37266919a0a6SAlan Cox { "SANYO CD-ROM CRD", NULL, ATA_HORKAGE_NODMA }, 37276919a0a6SAlan Cox { "HITACHI CDR-8", NULL, ATA_HORKAGE_NODMA }, 37286919a0a6SAlan Cox { "HITACHI CDR-8335", NULL, ATA_HORKAGE_NODMA }, 37296919a0a6SAlan Cox { "HITACHI CDR-8435", NULL, ATA_HORKAGE_NODMA }, 37306919a0a6SAlan Cox { "Toshiba CD-ROM XM-6202B", NULL, ATA_HORKAGE_NODMA }, 37316919a0a6SAlan Cox { "TOSHIBA CD-ROM XM-1702BC", NULL, ATA_HORKAGE_NODMA }, 37326919a0a6SAlan Cox { "CD-532E-A", NULL, ATA_HORKAGE_NODMA }, 37336919a0a6SAlan Cox { "E-IDE CD-ROM CR-840",NULL, ATA_HORKAGE_NODMA }, 37346919a0a6SAlan Cox { "CD-ROM Drive/F5A", NULL, ATA_HORKAGE_NODMA }, 37356919a0a6SAlan Cox { "WPI CDD-820", NULL, ATA_HORKAGE_NODMA }, 37366919a0a6SAlan Cox { "SAMSUNG CD-ROM SC-148C", NULL, ATA_HORKAGE_NODMA }, 37376919a0a6SAlan Cox { "SAMSUNG CD-ROM SC", NULL, ATA_HORKAGE_NODMA }, 37386919a0a6SAlan Cox { "ATAPI CD-ROM DRIVE 40X MAXIMUM",NULL,ATA_HORKAGE_NODMA }, 37396919a0a6SAlan Cox { "_NEC DV5800A", NULL, ATA_HORKAGE_NODMA }, 37406919a0a6SAlan Cox { "SAMSUNG CD-ROM SN-124","N001", ATA_HORKAGE_NODMA }, 374139f19886SDave Jones { "Seagate STT20000A", NULL, ATA_HORKAGE_NODMA }, 37425acd50f6STejun Heo { "IOMEGA ZIP 250 ATAPI", NULL, ATA_HORKAGE_NODMA }, /* temporary fix */ 374339ce7128STejun Heo { "IOMEGA ZIP 250 ATAPI Floppy", 374439ce7128STejun Heo NULL, ATA_HORKAGE_NODMA }, 37456919a0a6SAlan Cox 374618d6e9d5SAlbert Lee /* Weird ATAPI devices */ 374740a1d531STejun Heo { "TORiSAN DVD-ROM DRD-N216", NULL, ATA_HORKAGE_MAX_SEC_128 }, 374818d6e9d5SAlbert Lee 37496919a0a6SAlan Cox /* Devices we expect to fail diagnostics */ 37506919a0a6SAlan Cox 37516919a0a6SAlan Cox /* Devices where NCQ should be avoided */ 37526919a0a6SAlan Cox /* NCQ is slow */ 37536919a0a6SAlan Cox { "WDC WD740ADFD-00", NULL, ATA_HORKAGE_NONCQ }, 375409125ea6STejun Heo /* http://thread.gmane.org/gmane.linux.ide/14907 */ 375509125ea6STejun Heo { "FUJITSU MHT2060BH", NULL, ATA_HORKAGE_NONCQ }, 37567acfaf30SPaul Rolland /* NCQ is broken */ 37577acfaf30SPaul Rolland { "Maxtor 6L250S0", "BANC1G10", ATA_HORKAGE_NONCQ }, 3758471e44b2SJeff Garzik { "Maxtor 6B200M0", "BANC1B10", ATA_HORKAGE_NONCQ }, 375996442925SJens Axboe /* NCQ hard hangs device under heavier load, needs hard power cycle */ 376096442925SJens Axboe { "Maxtor 6B250S0", "BANC1B70", ATA_HORKAGE_NONCQ }, 376136e337d0SRobert Hancock /* Blacklist entries taken from Silicon Image 3124/3132 376236e337d0SRobert Hancock Windows driver .inf file - also several Linux problem reports */ 376336e337d0SRobert Hancock { "HTS541060G9SA00", "MB3OC60D", ATA_HORKAGE_NONCQ, }, 376436e337d0SRobert Hancock { "HTS541080G9SA00", "MB4OC60D", ATA_HORKAGE_NONCQ, }, 376536e337d0SRobert Hancock { "HTS541010G9SA00", "MBZOC60D", ATA_HORKAGE_NONCQ, }, 3766bd9c5a39STejun Heo /* Drives which do spurious command completion */ 3767bd9c5a39STejun Heo { "HTS541680J9SA00", "SB2IC7EP", ATA_HORKAGE_NONCQ, }, 37682f8fcebbSTejun Heo { "HTS541612J9SA00", "SBDIC7JP", ATA_HORKAGE_NONCQ, }, 3769e14cbfa6STejun Heo { "Hitachi HTS541616J9SA00", "SB4OC70P", ATA_HORKAGE_NONCQ, }, 37702f8fcebbSTejun Heo { "WDC WD740ADFD-00NLR1", NULL, ATA_HORKAGE_NONCQ, }, 37716919a0a6SAlan Cox 37726919a0a6SAlan Cox /* Devices with NCQ limits */ 37736919a0a6SAlan Cox 37746919a0a6SAlan Cox /* End Marker */ 37756919a0a6SAlan Cox { } 3776c6fd2807SJeff Garzik }; 3777c6fd2807SJeff Garzik 37786919a0a6SAlan Cox unsigned long ata_device_blacklisted(const struct ata_device *dev) 3779c6fd2807SJeff Garzik { 37808bfa79fcSTejun Heo unsigned char model_num[ATA_ID_PROD_LEN + 1]; 37818bfa79fcSTejun Heo unsigned char model_rev[ATA_ID_FW_REV_LEN + 1]; 37826919a0a6SAlan Cox const struct ata_blacklist_entry *ad = ata_device_blacklist; 3783c6fd2807SJeff Garzik 37848bfa79fcSTejun Heo ata_id_c_string(dev->id, model_num, ATA_ID_PROD, sizeof(model_num)); 37858bfa79fcSTejun Heo ata_id_c_string(dev->id, model_rev, ATA_ID_FW_REV, sizeof(model_rev)); 3786c6fd2807SJeff Garzik 37876919a0a6SAlan Cox while (ad->model_num) { 37888bfa79fcSTejun Heo if (!strcmp(ad->model_num, model_num)) { 37896919a0a6SAlan Cox if (ad->model_rev == NULL) 37906919a0a6SAlan Cox return ad->horkage; 37918bfa79fcSTejun Heo if (!strcmp(ad->model_rev, model_rev)) 37926919a0a6SAlan Cox return ad->horkage; 3793c6fd2807SJeff Garzik } 37946919a0a6SAlan Cox ad++; 3795c6fd2807SJeff Garzik } 3796c6fd2807SJeff Garzik return 0; 3797c6fd2807SJeff Garzik } 3798c6fd2807SJeff Garzik 37996919a0a6SAlan Cox static int ata_dma_blacklisted(const struct ata_device *dev) 38006919a0a6SAlan Cox { 38016919a0a6SAlan Cox /* We don't support polling DMA. 38026919a0a6SAlan Cox * DMA blacklist those ATAPI devices with CDB-intr (and use PIO) 38036919a0a6SAlan Cox * if the LLDD handles only interrupts in the HSM_ST_LAST state. 38046919a0a6SAlan Cox */ 38056919a0a6SAlan Cox if ((dev->ap->flags & ATA_FLAG_PIO_POLLING) && 38066919a0a6SAlan Cox (dev->flags & ATA_DFLAG_CDB_INTR)) 38076919a0a6SAlan Cox return 1; 38086919a0a6SAlan Cox return (ata_device_blacklisted(dev) & ATA_HORKAGE_NODMA) ? 1 : 0; 38096919a0a6SAlan Cox } 38106919a0a6SAlan Cox 3811c6fd2807SJeff Garzik /** 3812c6fd2807SJeff Garzik * ata_dev_xfermask - Compute supported xfermask of the given device 3813c6fd2807SJeff Garzik * @dev: Device to compute xfermask for 3814c6fd2807SJeff Garzik * 3815c6fd2807SJeff Garzik * Compute supported xfermask of @dev and store it in 3816c6fd2807SJeff Garzik * dev->*_mask. This function is responsible for applying all 3817c6fd2807SJeff Garzik * known limits including host controller limits, device 3818c6fd2807SJeff Garzik * blacklist, etc... 3819c6fd2807SJeff Garzik * 3820c6fd2807SJeff Garzik * LOCKING: 3821c6fd2807SJeff Garzik * None. 3822c6fd2807SJeff Garzik */ 3823c6fd2807SJeff Garzik static void ata_dev_xfermask(struct ata_device *dev) 3824c6fd2807SJeff Garzik { 3825c6fd2807SJeff Garzik struct ata_port *ap = dev->ap; 3826cca3974eSJeff Garzik struct ata_host *host = ap->host; 3827c6fd2807SJeff Garzik unsigned long xfer_mask; 3828c6fd2807SJeff Garzik 3829c6fd2807SJeff Garzik /* controller modes available */ 3830c6fd2807SJeff Garzik xfer_mask = ata_pack_xfermask(ap->pio_mask, 3831c6fd2807SJeff Garzik ap->mwdma_mask, ap->udma_mask); 3832c6fd2807SJeff Garzik 38338343f889SRobert Hancock /* drive modes available */ 3834c6fd2807SJeff Garzik xfer_mask &= ata_pack_xfermask(dev->pio_mask, 3835c6fd2807SJeff Garzik dev->mwdma_mask, dev->udma_mask); 3836c6fd2807SJeff Garzik xfer_mask &= ata_id_xfermask(dev->id); 3837c6fd2807SJeff Garzik 3838b352e57dSAlan Cox /* 3839b352e57dSAlan Cox * CFA Advanced TrueIDE timings are not allowed on a shared 3840b352e57dSAlan Cox * cable 3841b352e57dSAlan Cox */ 3842b352e57dSAlan Cox if (ata_dev_pair(dev)) { 3843b352e57dSAlan Cox /* No PIO5 or PIO6 */ 3844b352e57dSAlan Cox xfer_mask &= ~(0x03 << (ATA_SHIFT_PIO + 5)); 3845b352e57dSAlan Cox /* No MWDMA3 or MWDMA 4 */ 3846b352e57dSAlan Cox xfer_mask &= ~(0x03 << (ATA_SHIFT_MWDMA + 3)); 3847b352e57dSAlan Cox } 3848b352e57dSAlan Cox 3849c6fd2807SJeff Garzik if (ata_dma_blacklisted(dev)) { 3850c6fd2807SJeff Garzik xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA); 3851c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_WARNING, 3852c6fd2807SJeff Garzik "device is on DMA blacklist, disabling DMA\n"); 3853c6fd2807SJeff Garzik } 3854c6fd2807SJeff Garzik 385514d66ab7SPetr Vandrovec if ((host->flags & ATA_HOST_SIMPLEX) && 385614d66ab7SPetr Vandrovec host->simplex_claimed && host->simplex_claimed != ap) { 3857c6fd2807SJeff Garzik xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA); 3858c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_WARNING, "simplex DMA is claimed by " 3859c6fd2807SJeff Garzik "other device, disabling DMA\n"); 3860c6fd2807SJeff Garzik } 3861c6fd2807SJeff Garzik 3862e424675fSJeff Garzik if (ap->flags & ATA_FLAG_NO_IORDY) 3863e424675fSJeff Garzik xfer_mask &= ata_pio_mask_no_iordy(dev); 3864e424675fSJeff Garzik 3865c6fd2807SJeff Garzik if (ap->ops->mode_filter) 3866a76b62caSAlan Cox xfer_mask = ap->ops->mode_filter(dev, xfer_mask); 3867c6fd2807SJeff Garzik 38688343f889SRobert Hancock /* Apply cable rule here. Don't apply it early because when 38698343f889SRobert Hancock * we handle hot plug the cable type can itself change. 38708343f889SRobert Hancock * Check this last so that we know if the transfer rate was 38718343f889SRobert Hancock * solely limited by the cable. 38728343f889SRobert Hancock * Unknown or 80 wire cables reported host side are checked 38738343f889SRobert Hancock * drive side as well. Cases where we know a 40wire cable 38748343f889SRobert Hancock * is used safely for 80 are not checked here. 38758343f889SRobert Hancock */ 38768343f889SRobert Hancock if (xfer_mask & (0xF8 << ATA_SHIFT_UDMA)) 38778343f889SRobert Hancock /* UDMA/44 or higher would be available */ 38788343f889SRobert Hancock if((ap->cbl == ATA_CBL_PATA40) || 38798343f889SRobert Hancock (ata_drive_40wire(dev->id) && 38808343f889SRobert Hancock (ap->cbl == ATA_CBL_PATA_UNK || 38818343f889SRobert Hancock ap->cbl == ATA_CBL_PATA80))) { 38828343f889SRobert Hancock ata_dev_printk(dev, KERN_WARNING, 38838343f889SRobert Hancock "limited to UDMA/33 due to 40-wire cable\n"); 38848343f889SRobert Hancock xfer_mask &= ~(0xF8 << ATA_SHIFT_UDMA); 38858343f889SRobert Hancock } 38868343f889SRobert Hancock 3887c6fd2807SJeff Garzik ata_unpack_xfermask(xfer_mask, &dev->pio_mask, 3888c6fd2807SJeff Garzik &dev->mwdma_mask, &dev->udma_mask); 3889c6fd2807SJeff Garzik } 3890c6fd2807SJeff Garzik 3891c6fd2807SJeff Garzik /** 3892c6fd2807SJeff Garzik * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command 3893c6fd2807SJeff Garzik * @dev: Device to which command will be sent 3894c6fd2807SJeff Garzik * 3895c6fd2807SJeff Garzik * Issue SET FEATURES - XFER MODE command to device @dev 3896c6fd2807SJeff Garzik * on port @ap. 3897c6fd2807SJeff Garzik * 3898c6fd2807SJeff Garzik * LOCKING: 3899c6fd2807SJeff Garzik * PCI/etc. bus probe sem. 3900c6fd2807SJeff Garzik * 3901c6fd2807SJeff Garzik * RETURNS: 3902c6fd2807SJeff Garzik * 0 on success, AC_ERR_* mask otherwise. 3903c6fd2807SJeff Garzik */ 3904c6fd2807SJeff Garzik 3905c6fd2807SJeff Garzik static unsigned int ata_dev_set_xfermode(struct ata_device *dev) 3906c6fd2807SJeff Garzik { 3907c6fd2807SJeff Garzik struct ata_taskfile tf; 3908c6fd2807SJeff Garzik unsigned int err_mask; 3909c6fd2807SJeff Garzik 3910c6fd2807SJeff Garzik /* set up set-features taskfile */ 3911c6fd2807SJeff Garzik DPRINTK("set features - xfer mode\n"); 3912c6fd2807SJeff Garzik 3913464cf177STejun Heo /* Some controllers and ATAPI devices show flaky interrupt 3914464cf177STejun Heo * behavior after setting xfer mode. Use polling instead. 3915464cf177STejun Heo */ 3916c6fd2807SJeff Garzik ata_tf_init(dev, &tf); 3917c6fd2807SJeff Garzik tf.command = ATA_CMD_SET_FEATURES; 3918c6fd2807SJeff Garzik tf.feature = SETFEATURES_XFER; 3919464cf177STejun Heo tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_POLLING; 3920c6fd2807SJeff Garzik tf.protocol = ATA_PROT_NODATA; 3921c6fd2807SJeff Garzik tf.nsect = dev->xfer_mode; 3922c6fd2807SJeff Garzik 3923c6fd2807SJeff Garzik err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0); 3924c6fd2807SJeff Garzik 3925c6fd2807SJeff Garzik DPRINTK("EXIT, err_mask=%x\n", err_mask); 3926c6fd2807SJeff Garzik return err_mask; 3927c6fd2807SJeff Garzik } 3928c6fd2807SJeff Garzik 3929c6fd2807SJeff Garzik /** 3930c6fd2807SJeff Garzik * ata_dev_init_params - Issue INIT DEV PARAMS command 3931c6fd2807SJeff Garzik * @dev: Device to which command will be sent 3932c6fd2807SJeff Garzik * @heads: Number of heads (taskfile parameter) 3933c6fd2807SJeff Garzik * @sectors: Number of sectors (taskfile parameter) 3934c6fd2807SJeff Garzik * 3935c6fd2807SJeff Garzik * LOCKING: 3936c6fd2807SJeff Garzik * Kernel thread context (may sleep) 3937c6fd2807SJeff Garzik * 3938c6fd2807SJeff Garzik * RETURNS: 3939c6fd2807SJeff Garzik * 0 on success, AC_ERR_* mask otherwise. 3940c6fd2807SJeff Garzik */ 3941c6fd2807SJeff Garzik static unsigned int ata_dev_init_params(struct ata_device *dev, 3942c6fd2807SJeff Garzik u16 heads, u16 sectors) 3943c6fd2807SJeff Garzik { 3944c6fd2807SJeff Garzik struct ata_taskfile tf; 3945c6fd2807SJeff Garzik unsigned int err_mask; 3946c6fd2807SJeff Garzik 3947c6fd2807SJeff Garzik /* Number of sectors per track 1-255. Number of heads 1-16 */ 3948c6fd2807SJeff Garzik if (sectors < 1 || sectors > 255 || heads < 1 || heads > 16) 3949c6fd2807SJeff Garzik return AC_ERR_INVALID; 3950c6fd2807SJeff Garzik 3951c6fd2807SJeff Garzik /* set up init dev params taskfile */ 3952c6fd2807SJeff Garzik DPRINTK("init dev params \n"); 3953c6fd2807SJeff Garzik 3954c6fd2807SJeff Garzik ata_tf_init(dev, &tf); 3955c6fd2807SJeff Garzik tf.command = ATA_CMD_INIT_DEV_PARAMS; 3956c6fd2807SJeff Garzik tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 3957c6fd2807SJeff Garzik tf.protocol = ATA_PROT_NODATA; 3958c6fd2807SJeff Garzik tf.nsect = sectors; 3959c6fd2807SJeff Garzik tf.device |= (heads - 1) & 0x0f; /* max head = num. of heads - 1 */ 3960c6fd2807SJeff Garzik 3961c6fd2807SJeff Garzik err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0); 3962c6fd2807SJeff Garzik 3963c6fd2807SJeff Garzik DPRINTK("EXIT, err_mask=%x\n", err_mask); 3964c6fd2807SJeff Garzik return err_mask; 3965c6fd2807SJeff Garzik } 3966c6fd2807SJeff Garzik 3967c6fd2807SJeff Garzik /** 3968c6fd2807SJeff Garzik * ata_sg_clean - Unmap DMA memory associated with command 3969c6fd2807SJeff Garzik * @qc: Command containing DMA memory to be released 3970c6fd2807SJeff Garzik * 3971c6fd2807SJeff Garzik * Unmap all mapped DMA memory associated with this command. 3972c6fd2807SJeff Garzik * 3973c6fd2807SJeff Garzik * LOCKING: 3974cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 3975c6fd2807SJeff Garzik */ 397670e6ad0cSTejun Heo void ata_sg_clean(struct ata_queued_cmd *qc) 3977c6fd2807SJeff Garzik { 3978c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 3979c6fd2807SJeff Garzik struct scatterlist *sg = qc->__sg; 3980c6fd2807SJeff Garzik int dir = qc->dma_dir; 3981c6fd2807SJeff Garzik void *pad_buf = NULL; 3982c6fd2807SJeff Garzik 3983c6fd2807SJeff Garzik WARN_ON(!(qc->flags & ATA_QCFLAG_DMAMAP)); 3984c6fd2807SJeff Garzik WARN_ON(sg == NULL); 3985c6fd2807SJeff Garzik 3986c6fd2807SJeff Garzik if (qc->flags & ATA_QCFLAG_SINGLE) 3987c6fd2807SJeff Garzik WARN_ON(qc->n_elem > 1); 3988c6fd2807SJeff Garzik 3989c6fd2807SJeff Garzik VPRINTK("unmapping %u sg elements\n", qc->n_elem); 3990c6fd2807SJeff Garzik 3991c6fd2807SJeff Garzik /* if we padded the buffer out to 32-bit bound, and data 3992c6fd2807SJeff Garzik * xfer direction is from-device, we must copy from the 3993c6fd2807SJeff Garzik * pad buffer back into the supplied buffer 3994c6fd2807SJeff Garzik */ 3995c6fd2807SJeff Garzik if (qc->pad_len && !(qc->tf.flags & ATA_TFLAG_WRITE)) 3996c6fd2807SJeff Garzik pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ); 3997c6fd2807SJeff Garzik 3998c6fd2807SJeff Garzik if (qc->flags & ATA_QCFLAG_SG) { 3999c6fd2807SJeff Garzik if (qc->n_elem) 4000c6fd2807SJeff Garzik dma_unmap_sg(ap->dev, sg, qc->n_elem, dir); 4001c6fd2807SJeff Garzik /* restore last sg */ 4002c6fd2807SJeff Garzik sg[qc->orig_n_elem - 1].length += qc->pad_len; 4003c6fd2807SJeff Garzik if (pad_buf) { 4004c6fd2807SJeff Garzik struct scatterlist *psg = &qc->pad_sgent; 4005c6fd2807SJeff Garzik void *addr = kmap_atomic(psg->page, KM_IRQ0); 4006c6fd2807SJeff Garzik memcpy(addr + psg->offset, pad_buf, qc->pad_len); 4007c6fd2807SJeff Garzik kunmap_atomic(addr, KM_IRQ0); 4008c6fd2807SJeff Garzik } 4009c6fd2807SJeff Garzik } else { 4010c6fd2807SJeff Garzik if (qc->n_elem) 4011c6fd2807SJeff Garzik dma_unmap_single(ap->dev, 4012c6fd2807SJeff Garzik sg_dma_address(&sg[0]), sg_dma_len(&sg[0]), 4013c6fd2807SJeff Garzik dir); 4014c6fd2807SJeff Garzik /* restore sg */ 4015c6fd2807SJeff Garzik sg->length += qc->pad_len; 4016c6fd2807SJeff Garzik if (pad_buf) 4017c6fd2807SJeff Garzik memcpy(qc->buf_virt + sg->length - qc->pad_len, 4018c6fd2807SJeff Garzik pad_buf, qc->pad_len); 4019c6fd2807SJeff Garzik } 4020c6fd2807SJeff Garzik 4021c6fd2807SJeff Garzik qc->flags &= ~ATA_QCFLAG_DMAMAP; 4022c6fd2807SJeff Garzik qc->__sg = NULL; 4023c6fd2807SJeff Garzik } 4024c6fd2807SJeff Garzik 4025c6fd2807SJeff Garzik /** 4026c6fd2807SJeff Garzik * ata_fill_sg - Fill PCI IDE PRD table 4027c6fd2807SJeff Garzik * @qc: Metadata associated with taskfile to be transferred 4028c6fd2807SJeff Garzik * 4029c6fd2807SJeff Garzik * Fill PCI IDE PRD (scatter-gather) table with segments 4030c6fd2807SJeff Garzik * associated with the current disk command. 4031c6fd2807SJeff Garzik * 4032c6fd2807SJeff Garzik * LOCKING: 4033cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 4034c6fd2807SJeff Garzik * 4035c6fd2807SJeff Garzik */ 4036c6fd2807SJeff Garzik static void ata_fill_sg(struct ata_queued_cmd *qc) 4037c6fd2807SJeff Garzik { 4038c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 4039c6fd2807SJeff Garzik struct scatterlist *sg; 4040c6fd2807SJeff Garzik unsigned int idx; 4041c6fd2807SJeff Garzik 4042c6fd2807SJeff Garzik WARN_ON(qc->__sg == NULL); 4043c6fd2807SJeff Garzik WARN_ON(qc->n_elem == 0 && qc->pad_len == 0); 4044c6fd2807SJeff Garzik 4045c6fd2807SJeff Garzik idx = 0; 4046c6fd2807SJeff Garzik ata_for_each_sg(sg, qc) { 4047c6fd2807SJeff Garzik u32 addr, offset; 4048c6fd2807SJeff Garzik u32 sg_len, len; 4049c6fd2807SJeff Garzik 4050c6fd2807SJeff Garzik /* determine if physical DMA addr spans 64K boundary. 4051c6fd2807SJeff Garzik * Note h/w doesn't support 64-bit, so we unconditionally 4052c6fd2807SJeff Garzik * truncate dma_addr_t to u32. 4053c6fd2807SJeff Garzik */ 4054c6fd2807SJeff Garzik addr = (u32) sg_dma_address(sg); 4055c6fd2807SJeff Garzik sg_len = sg_dma_len(sg); 4056c6fd2807SJeff Garzik 4057c6fd2807SJeff Garzik while (sg_len) { 4058c6fd2807SJeff Garzik offset = addr & 0xffff; 4059c6fd2807SJeff Garzik len = sg_len; 4060c6fd2807SJeff Garzik if ((offset + sg_len) > 0x10000) 4061c6fd2807SJeff Garzik len = 0x10000 - offset; 4062c6fd2807SJeff Garzik 4063c6fd2807SJeff Garzik ap->prd[idx].addr = cpu_to_le32(addr); 4064c6fd2807SJeff Garzik ap->prd[idx].flags_len = cpu_to_le32(len & 0xffff); 4065c6fd2807SJeff Garzik VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", idx, addr, len); 4066c6fd2807SJeff Garzik 4067c6fd2807SJeff Garzik idx++; 4068c6fd2807SJeff Garzik sg_len -= len; 4069c6fd2807SJeff Garzik addr += len; 4070c6fd2807SJeff Garzik } 4071c6fd2807SJeff Garzik } 4072c6fd2807SJeff Garzik 4073c6fd2807SJeff Garzik if (idx) 4074c6fd2807SJeff Garzik ap->prd[idx - 1].flags_len |= cpu_to_le32(ATA_PRD_EOT); 4075c6fd2807SJeff Garzik } 4076b9a4197eSTejun Heo 4077c6fd2807SJeff Garzik /** 4078d26fc955SAlan Cox * ata_fill_sg_dumb - Fill PCI IDE PRD table 4079d26fc955SAlan Cox * @qc: Metadata associated with taskfile to be transferred 4080d26fc955SAlan Cox * 4081d26fc955SAlan Cox * Fill PCI IDE PRD (scatter-gather) table with segments 4082d26fc955SAlan Cox * associated with the current disk command. Perform the fill 4083d26fc955SAlan Cox * so that we avoid writing any length 64K records for 4084d26fc955SAlan Cox * controllers that don't follow the spec. 4085d26fc955SAlan Cox * 4086d26fc955SAlan Cox * LOCKING: 4087d26fc955SAlan Cox * spin_lock_irqsave(host lock) 4088d26fc955SAlan Cox * 4089d26fc955SAlan Cox */ 4090d26fc955SAlan Cox static void ata_fill_sg_dumb(struct ata_queued_cmd *qc) 4091d26fc955SAlan Cox { 4092d26fc955SAlan Cox struct ata_port *ap = qc->ap; 4093d26fc955SAlan Cox struct scatterlist *sg; 4094d26fc955SAlan Cox unsigned int idx; 4095d26fc955SAlan Cox 4096d26fc955SAlan Cox WARN_ON(qc->__sg == NULL); 4097d26fc955SAlan Cox WARN_ON(qc->n_elem == 0 && qc->pad_len == 0); 4098d26fc955SAlan Cox 4099d26fc955SAlan Cox idx = 0; 4100d26fc955SAlan Cox ata_for_each_sg(sg, qc) { 4101d26fc955SAlan Cox u32 addr, offset; 4102d26fc955SAlan Cox u32 sg_len, len, blen; 4103d26fc955SAlan Cox 4104d26fc955SAlan Cox /* determine if physical DMA addr spans 64K boundary. 4105d26fc955SAlan Cox * Note h/w doesn't support 64-bit, so we unconditionally 4106d26fc955SAlan Cox * truncate dma_addr_t to u32. 4107d26fc955SAlan Cox */ 4108d26fc955SAlan Cox addr = (u32) sg_dma_address(sg); 4109d26fc955SAlan Cox sg_len = sg_dma_len(sg); 4110d26fc955SAlan Cox 4111d26fc955SAlan Cox while (sg_len) { 4112d26fc955SAlan Cox offset = addr & 0xffff; 4113d26fc955SAlan Cox len = sg_len; 4114d26fc955SAlan Cox if ((offset + sg_len) > 0x10000) 4115d26fc955SAlan Cox len = 0x10000 - offset; 4116d26fc955SAlan Cox 4117d26fc955SAlan Cox blen = len & 0xffff; 4118d26fc955SAlan Cox ap->prd[idx].addr = cpu_to_le32(addr); 4119d26fc955SAlan Cox if (blen == 0) { 4120d26fc955SAlan Cox /* Some PATA chipsets like the CS5530 can't 4121d26fc955SAlan Cox cope with 0x0000 meaning 64K as the spec says */ 4122d26fc955SAlan Cox ap->prd[idx].flags_len = cpu_to_le32(0x8000); 4123d26fc955SAlan Cox blen = 0x8000; 4124d26fc955SAlan Cox ap->prd[++idx].addr = cpu_to_le32(addr + 0x8000); 4125d26fc955SAlan Cox } 4126d26fc955SAlan Cox ap->prd[idx].flags_len = cpu_to_le32(blen); 4127d26fc955SAlan Cox VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", idx, addr, len); 4128d26fc955SAlan Cox 4129d26fc955SAlan Cox idx++; 4130d26fc955SAlan Cox sg_len -= len; 4131d26fc955SAlan Cox addr += len; 4132d26fc955SAlan Cox } 4133d26fc955SAlan Cox } 4134d26fc955SAlan Cox 4135d26fc955SAlan Cox if (idx) 4136d26fc955SAlan Cox ap->prd[idx - 1].flags_len |= cpu_to_le32(ATA_PRD_EOT); 4137d26fc955SAlan Cox } 4138d26fc955SAlan Cox 4139d26fc955SAlan Cox /** 4140c6fd2807SJeff Garzik * ata_check_atapi_dma - Check whether ATAPI DMA can be supported 4141c6fd2807SJeff Garzik * @qc: Metadata associated with taskfile to check 4142c6fd2807SJeff Garzik * 4143c6fd2807SJeff Garzik * Allow low-level driver to filter ATA PACKET commands, returning 4144c6fd2807SJeff Garzik * a status indicating whether or not it is OK to use DMA for the 4145c6fd2807SJeff Garzik * supplied PACKET command. 4146c6fd2807SJeff Garzik * 4147c6fd2807SJeff Garzik * LOCKING: 4148cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 4149c6fd2807SJeff Garzik * 4150c6fd2807SJeff Garzik * RETURNS: 0 when ATAPI DMA can be used 4151c6fd2807SJeff Garzik * nonzero otherwise 4152c6fd2807SJeff Garzik */ 4153c6fd2807SJeff Garzik int ata_check_atapi_dma(struct ata_queued_cmd *qc) 4154c6fd2807SJeff Garzik { 4155c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 4156c6fd2807SJeff Garzik 4157b9a4197eSTejun Heo /* Don't allow DMA if it isn't multiple of 16 bytes. Quite a 4158b9a4197eSTejun Heo * few ATAPI devices choke on such DMA requests. 4159b9a4197eSTejun Heo */ 4160b9a4197eSTejun Heo if (unlikely(qc->nbytes & 15)) 41616f23a31dSAlbert Lee return 1; 41626f23a31dSAlbert Lee 4163c6fd2807SJeff Garzik if (ap->ops->check_atapi_dma) 4164b9a4197eSTejun Heo return ap->ops->check_atapi_dma(qc); 4165c6fd2807SJeff Garzik 4166b9a4197eSTejun Heo return 0; 4167c6fd2807SJeff Garzik } 4168b9a4197eSTejun Heo 4169c6fd2807SJeff Garzik /** 4170c6fd2807SJeff Garzik * ata_qc_prep - Prepare taskfile for submission 4171c6fd2807SJeff Garzik * @qc: Metadata associated with taskfile to be prepared 4172c6fd2807SJeff Garzik * 4173c6fd2807SJeff Garzik * Prepare ATA taskfile for submission. 4174c6fd2807SJeff Garzik * 4175c6fd2807SJeff Garzik * LOCKING: 4176cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 4177c6fd2807SJeff Garzik */ 4178c6fd2807SJeff Garzik void ata_qc_prep(struct ata_queued_cmd *qc) 4179c6fd2807SJeff Garzik { 4180c6fd2807SJeff Garzik if (!(qc->flags & ATA_QCFLAG_DMAMAP)) 4181c6fd2807SJeff Garzik return; 4182c6fd2807SJeff Garzik 4183c6fd2807SJeff Garzik ata_fill_sg(qc); 4184c6fd2807SJeff Garzik } 4185c6fd2807SJeff Garzik 4186d26fc955SAlan Cox /** 4187d26fc955SAlan Cox * ata_dumb_qc_prep - Prepare taskfile for submission 4188d26fc955SAlan Cox * @qc: Metadata associated with taskfile to be prepared 4189d26fc955SAlan Cox * 4190d26fc955SAlan Cox * Prepare ATA taskfile for submission. 4191d26fc955SAlan Cox * 4192d26fc955SAlan Cox * LOCKING: 4193d26fc955SAlan Cox * spin_lock_irqsave(host lock) 4194d26fc955SAlan Cox */ 4195d26fc955SAlan Cox void ata_dumb_qc_prep(struct ata_queued_cmd *qc) 4196d26fc955SAlan Cox { 4197d26fc955SAlan Cox if (!(qc->flags & ATA_QCFLAG_DMAMAP)) 4198d26fc955SAlan Cox return; 4199d26fc955SAlan Cox 4200d26fc955SAlan Cox ata_fill_sg_dumb(qc); 4201d26fc955SAlan Cox } 4202d26fc955SAlan Cox 4203c6fd2807SJeff Garzik void ata_noop_qc_prep(struct ata_queued_cmd *qc) { } 4204c6fd2807SJeff Garzik 4205c6fd2807SJeff Garzik /** 4206c6fd2807SJeff Garzik * ata_sg_init_one - Associate command with memory buffer 4207c6fd2807SJeff Garzik * @qc: Command to be associated 4208c6fd2807SJeff Garzik * @buf: Memory buffer 4209c6fd2807SJeff Garzik * @buflen: Length of memory buffer, in bytes. 4210c6fd2807SJeff Garzik * 4211c6fd2807SJeff Garzik * Initialize the data-related elements of queued_cmd @qc 4212c6fd2807SJeff Garzik * to point to a single memory buffer, @buf of byte length @buflen. 4213c6fd2807SJeff Garzik * 4214c6fd2807SJeff Garzik * LOCKING: 4215cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 4216c6fd2807SJeff Garzik */ 4217c6fd2807SJeff Garzik 4218c6fd2807SJeff Garzik void ata_sg_init_one(struct ata_queued_cmd *qc, void *buf, unsigned int buflen) 4219c6fd2807SJeff Garzik { 4220c6fd2807SJeff Garzik qc->flags |= ATA_QCFLAG_SINGLE; 4221c6fd2807SJeff Garzik 4222c6fd2807SJeff Garzik qc->__sg = &qc->sgent; 4223c6fd2807SJeff Garzik qc->n_elem = 1; 4224c6fd2807SJeff Garzik qc->orig_n_elem = 1; 4225c6fd2807SJeff Garzik qc->buf_virt = buf; 4226c6fd2807SJeff Garzik qc->nbytes = buflen; 4227c6fd2807SJeff Garzik 422861c0596cSTejun Heo sg_init_one(&qc->sgent, buf, buflen); 4229c6fd2807SJeff Garzik } 4230c6fd2807SJeff Garzik 4231c6fd2807SJeff Garzik /** 4232c6fd2807SJeff Garzik * ata_sg_init - Associate command with scatter-gather table. 4233c6fd2807SJeff Garzik * @qc: Command to be associated 4234c6fd2807SJeff Garzik * @sg: Scatter-gather table. 4235c6fd2807SJeff Garzik * @n_elem: Number of elements in s/g table. 4236c6fd2807SJeff Garzik * 4237c6fd2807SJeff Garzik * Initialize the data-related elements of queued_cmd @qc 4238c6fd2807SJeff Garzik * to point to a scatter-gather table @sg, containing @n_elem 4239c6fd2807SJeff Garzik * elements. 4240c6fd2807SJeff Garzik * 4241c6fd2807SJeff Garzik * LOCKING: 4242cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 4243c6fd2807SJeff Garzik */ 4244c6fd2807SJeff Garzik 4245c6fd2807SJeff Garzik void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg, 4246c6fd2807SJeff Garzik unsigned int n_elem) 4247c6fd2807SJeff Garzik { 4248c6fd2807SJeff Garzik qc->flags |= ATA_QCFLAG_SG; 4249c6fd2807SJeff Garzik qc->__sg = sg; 4250c6fd2807SJeff Garzik qc->n_elem = n_elem; 4251c6fd2807SJeff Garzik qc->orig_n_elem = n_elem; 4252c6fd2807SJeff Garzik } 4253c6fd2807SJeff Garzik 4254c6fd2807SJeff Garzik /** 4255c6fd2807SJeff Garzik * ata_sg_setup_one - DMA-map the memory buffer associated with a command. 4256c6fd2807SJeff Garzik * @qc: Command with memory buffer to be mapped. 4257c6fd2807SJeff Garzik * 4258c6fd2807SJeff Garzik * DMA-map the memory buffer associated with queued_cmd @qc. 4259c6fd2807SJeff Garzik * 4260c6fd2807SJeff Garzik * LOCKING: 4261cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 4262c6fd2807SJeff Garzik * 4263c6fd2807SJeff Garzik * RETURNS: 4264c6fd2807SJeff Garzik * Zero on success, negative on error. 4265c6fd2807SJeff Garzik */ 4266c6fd2807SJeff Garzik 4267c6fd2807SJeff Garzik static int ata_sg_setup_one(struct ata_queued_cmd *qc) 4268c6fd2807SJeff Garzik { 4269c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 4270c6fd2807SJeff Garzik int dir = qc->dma_dir; 4271c6fd2807SJeff Garzik struct scatterlist *sg = qc->__sg; 4272c6fd2807SJeff Garzik dma_addr_t dma_address; 4273c6fd2807SJeff Garzik int trim_sg = 0; 4274c6fd2807SJeff Garzik 4275c6fd2807SJeff Garzik /* we must lengthen transfers to end on a 32-bit boundary */ 4276c6fd2807SJeff Garzik qc->pad_len = sg->length & 3; 4277c6fd2807SJeff Garzik if (qc->pad_len) { 4278c6fd2807SJeff Garzik void *pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ); 4279c6fd2807SJeff Garzik struct scatterlist *psg = &qc->pad_sgent; 4280c6fd2807SJeff Garzik 4281c6fd2807SJeff Garzik WARN_ON(qc->dev->class != ATA_DEV_ATAPI); 4282c6fd2807SJeff Garzik 4283c6fd2807SJeff Garzik memset(pad_buf, 0, ATA_DMA_PAD_SZ); 4284c6fd2807SJeff Garzik 4285c6fd2807SJeff Garzik if (qc->tf.flags & ATA_TFLAG_WRITE) 4286c6fd2807SJeff Garzik memcpy(pad_buf, qc->buf_virt + sg->length - qc->pad_len, 4287c6fd2807SJeff Garzik qc->pad_len); 4288c6fd2807SJeff Garzik 4289c6fd2807SJeff Garzik sg_dma_address(psg) = ap->pad_dma + (qc->tag * ATA_DMA_PAD_SZ); 4290c6fd2807SJeff Garzik sg_dma_len(psg) = ATA_DMA_PAD_SZ; 4291c6fd2807SJeff Garzik /* trim sg */ 4292c6fd2807SJeff Garzik sg->length -= qc->pad_len; 4293c6fd2807SJeff Garzik if (sg->length == 0) 4294c6fd2807SJeff Garzik trim_sg = 1; 4295c6fd2807SJeff Garzik 4296c6fd2807SJeff Garzik DPRINTK("padding done, sg->length=%u pad_len=%u\n", 4297c6fd2807SJeff Garzik sg->length, qc->pad_len); 4298c6fd2807SJeff Garzik } 4299c6fd2807SJeff Garzik 4300c6fd2807SJeff Garzik if (trim_sg) { 4301c6fd2807SJeff Garzik qc->n_elem--; 4302c6fd2807SJeff Garzik goto skip_map; 4303c6fd2807SJeff Garzik } 4304c6fd2807SJeff Garzik 4305c6fd2807SJeff Garzik dma_address = dma_map_single(ap->dev, qc->buf_virt, 4306c6fd2807SJeff Garzik sg->length, dir); 4307c6fd2807SJeff Garzik if (dma_mapping_error(dma_address)) { 4308c6fd2807SJeff Garzik /* restore sg */ 4309c6fd2807SJeff Garzik sg->length += qc->pad_len; 4310c6fd2807SJeff Garzik return -1; 4311c6fd2807SJeff Garzik } 4312c6fd2807SJeff Garzik 4313c6fd2807SJeff Garzik sg_dma_address(sg) = dma_address; 4314c6fd2807SJeff Garzik sg_dma_len(sg) = sg->length; 4315c6fd2807SJeff Garzik 4316c6fd2807SJeff Garzik skip_map: 4317c6fd2807SJeff Garzik DPRINTK("mapped buffer of %d bytes for %s\n", sg_dma_len(sg), 4318c6fd2807SJeff Garzik qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read"); 4319c6fd2807SJeff Garzik 4320c6fd2807SJeff Garzik return 0; 4321c6fd2807SJeff Garzik } 4322c6fd2807SJeff Garzik 4323c6fd2807SJeff Garzik /** 4324c6fd2807SJeff Garzik * ata_sg_setup - DMA-map the scatter-gather table associated with a command. 4325c6fd2807SJeff Garzik * @qc: Command with scatter-gather table to be mapped. 4326c6fd2807SJeff Garzik * 4327c6fd2807SJeff Garzik * DMA-map the scatter-gather table associated with queued_cmd @qc. 4328c6fd2807SJeff Garzik * 4329c6fd2807SJeff Garzik * LOCKING: 4330cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 4331c6fd2807SJeff Garzik * 4332c6fd2807SJeff Garzik * RETURNS: 4333c6fd2807SJeff Garzik * Zero on success, negative on error. 4334c6fd2807SJeff Garzik * 4335c6fd2807SJeff Garzik */ 4336c6fd2807SJeff Garzik 4337c6fd2807SJeff Garzik static int ata_sg_setup(struct ata_queued_cmd *qc) 4338c6fd2807SJeff Garzik { 4339c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 4340c6fd2807SJeff Garzik struct scatterlist *sg = qc->__sg; 4341c6fd2807SJeff Garzik struct scatterlist *lsg = &sg[qc->n_elem - 1]; 4342c6fd2807SJeff Garzik int n_elem, pre_n_elem, dir, trim_sg = 0; 4343c6fd2807SJeff Garzik 434444877b4eSTejun Heo VPRINTK("ENTER, ata%u\n", ap->print_id); 4345c6fd2807SJeff Garzik WARN_ON(!(qc->flags & ATA_QCFLAG_SG)); 4346c6fd2807SJeff Garzik 4347c6fd2807SJeff Garzik /* we must lengthen transfers to end on a 32-bit boundary */ 4348c6fd2807SJeff Garzik qc->pad_len = lsg->length & 3; 4349c6fd2807SJeff Garzik if (qc->pad_len) { 4350c6fd2807SJeff Garzik void *pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ); 4351c6fd2807SJeff Garzik struct scatterlist *psg = &qc->pad_sgent; 4352c6fd2807SJeff Garzik unsigned int offset; 4353c6fd2807SJeff Garzik 4354c6fd2807SJeff Garzik WARN_ON(qc->dev->class != ATA_DEV_ATAPI); 4355c6fd2807SJeff Garzik 4356c6fd2807SJeff Garzik memset(pad_buf, 0, ATA_DMA_PAD_SZ); 4357c6fd2807SJeff Garzik 4358c6fd2807SJeff Garzik /* 4359c6fd2807SJeff Garzik * psg->page/offset are used to copy to-be-written 4360c6fd2807SJeff Garzik * data in this function or read data in ata_sg_clean. 4361c6fd2807SJeff Garzik */ 4362c6fd2807SJeff Garzik offset = lsg->offset + lsg->length - qc->pad_len; 4363c6fd2807SJeff Garzik psg->page = nth_page(lsg->page, offset >> PAGE_SHIFT); 4364c6fd2807SJeff Garzik psg->offset = offset_in_page(offset); 4365c6fd2807SJeff Garzik 4366c6fd2807SJeff Garzik if (qc->tf.flags & ATA_TFLAG_WRITE) { 4367c6fd2807SJeff Garzik void *addr = kmap_atomic(psg->page, KM_IRQ0); 4368c6fd2807SJeff Garzik memcpy(pad_buf, addr + psg->offset, qc->pad_len); 4369c6fd2807SJeff Garzik kunmap_atomic(addr, KM_IRQ0); 4370c6fd2807SJeff Garzik } 4371c6fd2807SJeff Garzik 4372c6fd2807SJeff Garzik sg_dma_address(psg) = ap->pad_dma + (qc->tag * ATA_DMA_PAD_SZ); 4373c6fd2807SJeff Garzik sg_dma_len(psg) = ATA_DMA_PAD_SZ; 4374c6fd2807SJeff Garzik /* trim last sg */ 4375c6fd2807SJeff Garzik lsg->length -= qc->pad_len; 4376c6fd2807SJeff Garzik if (lsg->length == 0) 4377c6fd2807SJeff Garzik trim_sg = 1; 4378c6fd2807SJeff Garzik 4379c6fd2807SJeff Garzik DPRINTK("padding done, sg[%d].length=%u pad_len=%u\n", 4380c6fd2807SJeff Garzik qc->n_elem - 1, lsg->length, qc->pad_len); 4381c6fd2807SJeff Garzik } 4382c6fd2807SJeff Garzik 4383c6fd2807SJeff Garzik pre_n_elem = qc->n_elem; 4384c6fd2807SJeff Garzik if (trim_sg && pre_n_elem) 4385c6fd2807SJeff Garzik pre_n_elem--; 4386c6fd2807SJeff Garzik 4387c6fd2807SJeff Garzik if (!pre_n_elem) { 4388c6fd2807SJeff Garzik n_elem = 0; 4389c6fd2807SJeff Garzik goto skip_map; 4390c6fd2807SJeff Garzik } 4391c6fd2807SJeff Garzik 4392c6fd2807SJeff Garzik dir = qc->dma_dir; 4393c6fd2807SJeff Garzik n_elem = dma_map_sg(ap->dev, sg, pre_n_elem, dir); 4394c6fd2807SJeff Garzik if (n_elem < 1) { 4395c6fd2807SJeff Garzik /* restore last sg */ 4396c6fd2807SJeff Garzik lsg->length += qc->pad_len; 4397c6fd2807SJeff Garzik return -1; 4398c6fd2807SJeff Garzik } 4399c6fd2807SJeff Garzik 4400c6fd2807SJeff Garzik DPRINTK("%d sg elements mapped\n", n_elem); 4401c6fd2807SJeff Garzik 4402c6fd2807SJeff Garzik skip_map: 4403c6fd2807SJeff Garzik qc->n_elem = n_elem; 4404c6fd2807SJeff Garzik 4405c6fd2807SJeff Garzik return 0; 4406c6fd2807SJeff Garzik } 4407c6fd2807SJeff Garzik 4408c6fd2807SJeff Garzik /** 4409c6fd2807SJeff Garzik * swap_buf_le16 - swap halves of 16-bit words in place 4410c6fd2807SJeff Garzik * @buf: Buffer to swap 4411c6fd2807SJeff Garzik * @buf_words: Number of 16-bit words in buffer. 4412c6fd2807SJeff Garzik * 4413c6fd2807SJeff Garzik * Swap halves of 16-bit words if needed to convert from 4414c6fd2807SJeff Garzik * little-endian byte order to native cpu byte order, or 4415c6fd2807SJeff Garzik * vice-versa. 4416c6fd2807SJeff Garzik * 4417c6fd2807SJeff Garzik * LOCKING: 4418c6fd2807SJeff Garzik * Inherited from caller. 4419c6fd2807SJeff Garzik */ 4420c6fd2807SJeff Garzik void swap_buf_le16(u16 *buf, unsigned int buf_words) 4421c6fd2807SJeff Garzik { 4422c6fd2807SJeff Garzik #ifdef __BIG_ENDIAN 4423c6fd2807SJeff Garzik unsigned int i; 4424c6fd2807SJeff Garzik 4425c6fd2807SJeff Garzik for (i = 0; i < buf_words; i++) 4426c6fd2807SJeff Garzik buf[i] = le16_to_cpu(buf[i]); 4427c6fd2807SJeff Garzik #endif /* __BIG_ENDIAN */ 4428c6fd2807SJeff Garzik } 4429c6fd2807SJeff Garzik 4430c6fd2807SJeff Garzik /** 44310d5ff566STejun Heo * ata_data_xfer - Transfer data by PIO 4432c6fd2807SJeff Garzik * @adev: device to target 4433c6fd2807SJeff Garzik * @buf: data buffer 4434c6fd2807SJeff Garzik * @buflen: buffer length 4435c6fd2807SJeff Garzik * @write_data: read/write 4436c6fd2807SJeff Garzik * 4437c6fd2807SJeff Garzik * Transfer data from/to the device data register by PIO. 4438c6fd2807SJeff Garzik * 4439c6fd2807SJeff Garzik * LOCKING: 4440c6fd2807SJeff Garzik * Inherited from caller. 4441c6fd2807SJeff Garzik */ 44420d5ff566STejun Heo void ata_data_xfer(struct ata_device *adev, unsigned char *buf, 4443c6fd2807SJeff Garzik unsigned int buflen, int write_data) 4444c6fd2807SJeff Garzik { 4445c6fd2807SJeff Garzik struct ata_port *ap = adev->ap; 4446c6fd2807SJeff Garzik unsigned int words = buflen >> 1; 4447c6fd2807SJeff Garzik 4448c6fd2807SJeff Garzik /* Transfer multiple of 2 bytes */ 4449c6fd2807SJeff Garzik if (write_data) 44500d5ff566STejun Heo iowrite16_rep(ap->ioaddr.data_addr, buf, words); 4451c6fd2807SJeff Garzik else 44520d5ff566STejun Heo ioread16_rep(ap->ioaddr.data_addr, buf, words); 4453c6fd2807SJeff Garzik 4454c6fd2807SJeff Garzik /* Transfer trailing 1 byte, if any. */ 4455c6fd2807SJeff Garzik if (unlikely(buflen & 0x01)) { 4456c6fd2807SJeff Garzik u16 align_buf[1] = { 0 }; 4457c6fd2807SJeff Garzik unsigned char *trailing_buf = buf + buflen - 1; 4458c6fd2807SJeff Garzik 4459c6fd2807SJeff Garzik if (write_data) { 4460c6fd2807SJeff Garzik memcpy(align_buf, trailing_buf, 1); 44610d5ff566STejun Heo iowrite16(le16_to_cpu(align_buf[0]), ap->ioaddr.data_addr); 4462c6fd2807SJeff Garzik } else { 44630d5ff566STejun Heo align_buf[0] = cpu_to_le16(ioread16(ap->ioaddr.data_addr)); 4464c6fd2807SJeff Garzik memcpy(trailing_buf, align_buf, 1); 4465c6fd2807SJeff Garzik } 4466c6fd2807SJeff Garzik } 4467c6fd2807SJeff Garzik } 4468c6fd2807SJeff Garzik 4469c6fd2807SJeff Garzik /** 44700d5ff566STejun Heo * ata_data_xfer_noirq - Transfer data by PIO 4471c6fd2807SJeff Garzik * @adev: device to target 4472c6fd2807SJeff Garzik * @buf: data buffer 4473c6fd2807SJeff Garzik * @buflen: buffer length 4474c6fd2807SJeff Garzik * @write_data: read/write 4475c6fd2807SJeff Garzik * 4476c6fd2807SJeff Garzik * Transfer data from/to the device data register by PIO. Do the 4477c6fd2807SJeff Garzik * transfer with interrupts disabled. 4478c6fd2807SJeff Garzik * 4479c6fd2807SJeff Garzik * LOCKING: 4480c6fd2807SJeff Garzik * Inherited from caller. 4481c6fd2807SJeff Garzik */ 44820d5ff566STejun Heo void ata_data_xfer_noirq(struct ata_device *adev, unsigned char *buf, 4483c6fd2807SJeff Garzik unsigned int buflen, int write_data) 4484c6fd2807SJeff Garzik { 4485c6fd2807SJeff Garzik unsigned long flags; 4486c6fd2807SJeff Garzik local_irq_save(flags); 44870d5ff566STejun Heo ata_data_xfer(adev, buf, buflen, write_data); 4488c6fd2807SJeff Garzik local_irq_restore(flags); 4489c6fd2807SJeff Garzik } 4490c6fd2807SJeff Garzik 4491c6fd2807SJeff Garzik 4492c6fd2807SJeff Garzik /** 44935a5dbd18SMark Lord * ata_pio_sector - Transfer a sector of data. 4494c6fd2807SJeff Garzik * @qc: Command on going 4495c6fd2807SJeff Garzik * 44965a5dbd18SMark Lord * Transfer qc->sect_size bytes of data from/to the ATA device. 4497c6fd2807SJeff Garzik * 4498c6fd2807SJeff Garzik * LOCKING: 4499c6fd2807SJeff Garzik * Inherited from caller. 4500c6fd2807SJeff Garzik */ 4501c6fd2807SJeff Garzik 4502c6fd2807SJeff Garzik static void ata_pio_sector(struct ata_queued_cmd *qc) 4503c6fd2807SJeff Garzik { 4504c6fd2807SJeff Garzik int do_write = (qc->tf.flags & ATA_TFLAG_WRITE); 4505c6fd2807SJeff Garzik struct scatterlist *sg = qc->__sg; 4506c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 4507c6fd2807SJeff Garzik struct page *page; 4508c6fd2807SJeff Garzik unsigned int offset; 4509c6fd2807SJeff Garzik unsigned char *buf; 4510c6fd2807SJeff Garzik 45115a5dbd18SMark Lord if (qc->curbytes == qc->nbytes - qc->sect_size) 4512c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_LAST; 4513c6fd2807SJeff Garzik 4514c6fd2807SJeff Garzik page = sg[qc->cursg].page; 4515726f0785STejun Heo offset = sg[qc->cursg].offset + qc->cursg_ofs; 4516c6fd2807SJeff Garzik 4517c6fd2807SJeff Garzik /* get the current page and offset */ 4518c6fd2807SJeff Garzik page = nth_page(page, (offset >> PAGE_SHIFT)); 4519c6fd2807SJeff Garzik offset %= PAGE_SIZE; 4520c6fd2807SJeff Garzik 4521c6fd2807SJeff Garzik DPRINTK("data %s\n", qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read"); 4522c6fd2807SJeff Garzik 4523c6fd2807SJeff Garzik if (PageHighMem(page)) { 4524c6fd2807SJeff Garzik unsigned long flags; 4525c6fd2807SJeff Garzik 4526c6fd2807SJeff Garzik /* FIXME: use a bounce buffer */ 4527c6fd2807SJeff Garzik local_irq_save(flags); 4528c6fd2807SJeff Garzik buf = kmap_atomic(page, KM_IRQ0); 4529c6fd2807SJeff Garzik 4530c6fd2807SJeff Garzik /* do the actual data transfer */ 45315a5dbd18SMark Lord ap->ops->data_xfer(qc->dev, buf + offset, qc->sect_size, do_write); 4532c6fd2807SJeff Garzik 4533c6fd2807SJeff Garzik kunmap_atomic(buf, KM_IRQ0); 4534c6fd2807SJeff Garzik local_irq_restore(flags); 4535c6fd2807SJeff Garzik } else { 4536c6fd2807SJeff Garzik buf = page_address(page); 45375a5dbd18SMark Lord ap->ops->data_xfer(qc->dev, buf + offset, qc->sect_size, do_write); 4538c6fd2807SJeff Garzik } 4539c6fd2807SJeff Garzik 45405a5dbd18SMark Lord qc->curbytes += qc->sect_size; 45415a5dbd18SMark Lord qc->cursg_ofs += qc->sect_size; 4542c6fd2807SJeff Garzik 4543726f0785STejun Heo if (qc->cursg_ofs == (&sg[qc->cursg])->length) { 4544c6fd2807SJeff Garzik qc->cursg++; 4545c6fd2807SJeff Garzik qc->cursg_ofs = 0; 4546c6fd2807SJeff Garzik } 4547c6fd2807SJeff Garzik } 4548c6fd2807SJeff Garzik 4549c6fd2807SJeff Garzik /** 45505a5dbd18SMark Lord * ata_pio_sectors - Transfer one or many sectors. 4551c6fd2807SJeff Garzik * @qc: Command on going 4552c6fd2807SJeff Garzik * 45535a5dbd18SMark Lord * Transfer one or many sectors of data from/to the 4554c6fd2807SJeff Garzik * ATA device for the DRQ request. 4555c6fd2807SJeff Garzik * 4556c6fd2807SJeff Garzik * LOCKING: 4557c6fd2807SJeff Garzik * Inherited from caller. 4558c6fd2807SJeff Garzik */ 4559c6fd2807SJeff Garzik 4560c6fd2807SJeff Garzik static void ata_pio_sectors(struct ata_queued_cmd *qc) 4561c6fd2807SJeff Garzik { 4562c6fd2807SJeff Garzik if (is_multi_taskfile(&qc->tf)) { 4563c6fd2807SJeff Garzik /* READ/WRITE MULTIPLE */ 4564c6fd2807SJeff Garzik unsigned int nsect; 4565c6fd2807SJeff Garzik 4566c6fd2807SJeff Garzik WARN_ON(qc->dev->multi_count == 0); 4567c6fd2807SJeff Garzik 45685a5dbd18SMark Lord nsect = min((qc->nbytes - qc->curbytes) / qc->sect_size, 4569726f0785STejun Heo qc->dev->multi_count); 4570c6fd2807SJeff Garzik while (nsect--) 4571c6fd2807SJeff Garzik ata_pio_sector(qc); 4572c6fd2807SJeff Garzik } else 4573c6fd2807SJeff Garzik ata_pio_sector(qc); 4574c6fd2807SJeff Garzik } 4575c6fd2807SJeff Garzik 4576c6fd2807SJeff Garzik /** 4577c6fd2807SJeff Garzik * atapi_send_cdb - Write CDB bytes to hardware 4578c6fd2807SJeff Garzik * @ap: Port to which ATAPI device is attached. 4579c6fd2807SJeff Garzik * @qc: Taskfile currently active 4580c6fd2807SJeff Garzik * 4581c6fd2807SJeff Garzik * When device has indicated its readiness to accept 4582c6fd2807SJeff Garzik * a CDB, this function is called. Send the CDB. 4583c6fd2807SJeff Garzik * 4584c6fd2807SJeff Garzik * LOCKING: 4585c6fd2807SJeff Garzik * caller. 4586c6fd2807SJeff Garzik */ 4587c6fd2807SJeff Garzik 4588c6fd2807SJeff Garzik static void atapi_send_cdb(struct ata_port *ap, struct ata_queued_cmd *qc) 4589c6fd2807SJeff Garzik { 4590c6fd2807SJeff Garzik /* send SCSI cdb */ 4591c6fd2807SJeff Garzik DPRINTK("send cdb\n"); 4592c6fd2807SJeff Garzik WARN_ON(qc->dev->cdb_len < 12); 4593c6fd2807SJeff Garzik 4594c6fd2807SJeff Garzik ap->ops->data_xfer(qc->dev, qc->cdb, qc->dev->cdb_len, 1); 4595c6fd2807SJeff Garzik ata_altstatus(ap); /* flush */ 4596c6fd2807SJeff Garzik 4597c6fd2807SJeff Garzik switch (qc->tf.protocol) { 4598c6fd2807SJeff Garzik case ATA_PROT_ATAPI: 4599c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST; 4600c6fd2807SJeff Garzik break; 4601c6fd2807SJeff Garzik case ATA_PROT_ATAPI_NODATA: 4602c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_LAST; 4603c6fd2807SJeff Garzik break; 4604c6fd2807SJeff Garzik case ATA_PROT_ATAPI_DMA: 4605c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_LAST; 4606c6fd2807SJeff Garzik /* initiate bmdma */ 4607c6fd2807SJeff Garzik ap->ops->bmdma_start(qc); 4608c6fd2807SJeff Garzik break; 4609c6fd2807SJeff Garzik } 4610c6fd2807SJeff Garzik } 4611c6fd2807SJeff Garzik 4612c6fd2807SJeff Garzik /** 4613c6fd2807SJeff Garzik * __atapi_pio_bytes - Transfer data from/to the ATAPI device. 4614c6fd2807SJeff Garzik * @qc: Command on going 4615c6fd2807SJeff Garzik * @bytes: number of bytes 4616c6fd2807SJeff Garzik * 4617c6fd2807SJeff Garzik * Transfer Transfer data from/to the ATAPI device. 4618c6fd2807SJeff Garzik * 4619c6fd2807SJeff Garzik * LOCKING: 4620c6fd2807SJeff Garzik * Inherited from caller. 4621c6fd2807SJeff Garzik * 4622c6fd2807SJeff Garzik */ 4623c6fd2807SJeff Garzik 4624c6fd2807SJeff Garzik static void __atapi_pio_bytes(struct ata_queued_cmd *qc, unsigned int bytes) 4625c6fd2807SJeff Garzik { 4626c6fd2807SJeff Garzik int do_write = (qc->tf.flags & ATA_TFLAG_WRITE); 4627c6fd2807SJeff Garzik struct scatterlist *sg = qc->__sg; 4628c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 4629c6fd2807SJeff Garzik struct page *page; 4630c6fd2807SJeff Garzik unsigned char *buf; 4631c6fd2807SJeff Garzik unsigned int offset, count; 4632c6fd2807SJeff Garzik 4633c6fd2807SJeff Garzik if (qc->curbytes + bytes >= qc->nbytes) 4634c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_LAST; 4635c6fd2807SJeff Garzik 4636c6fd2807SJeff Garzik next_sg: 4637c6fd2807SJeff Garzik if (unlikely(qc->cursg >= qc->n_elem)) { 4638c6fd2807SJeff Garzik /* 4639c6fd2807SJeff Garzik * The end of qc->sg is reached and the device expects 4640c6fd2807SJeff Garzik * more data to transfer. In order not to overrun qc->sg 4641c6fd2807SJeff Garzik * and fulfill length specified in the byte count register, 4642c6fd2807SJeff Garzik * - for read case, discard trailing data from the device 4643c6fd2807SJeff Garzik * - for write case, padding zero data to the device 4644c6fd2807SJeff Garzik */ 4645c6fd2807SJeff Garzik u16 pad_buf[1] = { 0 }; 4646c6fd2807SJeff Garzik unsigned int words = bytes >> 1; 4647c6fd2807SJeff Garzik unsigned int i; 4648c6fd2807SJeff Garzik 4649c6fd2807SJeff Garzik if (words) /* warning if bytes > 1 */ 4650c6fd2807SJeff Garzik ata_dev_printk(qc->dev, KERN_WARNING, 4651c6fd2807SJeff Garzik "%u bytes trailing data\n", bytes); 4652c6fd2807SJeff Garzik 4653c6fd2807SJeff Garzik for (i = 0; i < words; i++) 4654c6fd2807SJeff Garzik ap->ops->data_xfer(qc->dev, (unsigned char*)pad_buf, 2, do_write); 4655c6fd2807SJeff Garzik 4656c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_LAST; 4657c6fd2807SJeff Garzik return; 4658c6fd2807SJeff Garzik } 4659c6fd2807SJeff Garzik 4660c6fd2807SJeff Garzik sg = &qc->__sg[qc->cursg]; 4661c6fd2807SJeff Garzik 4662c6fd2807SJeff Garzik page = sg->page; 4663c6fd2807SJeff Garzik offset = sg->offset + qc->cursg_ofs; 4664c6fd2807SJeff Garzik 4665c6fd2807SJeff Garzik /* get the current page and offset */ 4666c6fd2807SJeff Garzik page = nth_page(page, (offset >> PAGE_SHIFT)); 4667c6fd2807SJeff Garzik offset %= PAGE_SIZE; 4668c6fd2807SJeff Garzik 4669c6fd2807SJeff Garzik /* don't overrun current sg */ 4670c6fd2807SJeff Garzik count = min(sg->length - qc->cursg_ofs, bytes); 4671c6fd2807SJeff Garzik 4672c6fd2807SJeff Garzik /* don't cross page boundaries */ 4673c6fd2807SJeff Garzik count = min(count, (unsigned int)PAGE_SIZE - offset); 4674c6fd2807SJeff Garzik 4675c6fd2807SJeff Garzik DPRINTK("data %s\n", qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read"); 4676c6fd2807SJeff Garzik 4677c6fd2807SJeff Garzik if (PageHighMem(page)) { 4678c6fd2807SJeff Garzik unsigned long flags; 4679c6fd2807SJeff Garzik 4680c6fd2807SJeff Garzik /* FIXME: use bounce buffer */ 4681c6fd2807SJeff Garzik local_irq_save(flags); 4682c6fd2807SJeff Garzik buf = kmap_atomic(page, KM_IRQ0); 4683c6fd2807SJeff Garzik 4684c6fd2807SJeff Garzik /* do the actual data transfer */ 4685c6fd2807SJeff Garzik ap->ops->data_xfer(qc->dev, buf + offset, count, do_write); 4686c6fd2807SJeff Garzik 4687c6fd2807SJeff Garzik kunmap_atomic(buf, KM_IRQ0); 4688c6fd2807SJeff Garzik local_irq_restore(flags); 4689c6fd2807SJeff Garzik } else { 4690c6fd2807SJeff Garzik buf = page_address(page); 4691c6fd2807SJeff Garzik ap->ops->data_xfer(qc->dev, buf + offset, count, do_write); 4692c6fd2807SJeff Garzik } 4693c6fd2807SJeff Garzik 4694c6fd2807SJeff Garzik bytes -= count; 4695c6fd2807SJeff Garzik qc->curbytes += count; 4696c6fd2807SJeff Garzik qc->cursg_ofs += count; 4697c6fd2807SJeff Garzik 4698c6fd2807SJeff Garzik if (qc->cursg_ofs == sg->length) { 4699c6fd2807SJeff Garzik qc->cursg++; 4700c6fd2807SJeff Garzik qc->cursg_ofs = 0; 4701c6fd2807SJeff Garzik } 4702c6fd2807SJeff Garzik 4703c6fd2807SJeff Garzik if (bytes) 4704c6fd2807SJeff Garzik goto next_sg; 4705c6fd2807SJeff Garzik } 4706c6fd2807SJeff Garzik 4707c6fd2807SJeff Garzik /** 4708c6fd2807SJeff Garzik * atapi_pio_bytes - Transfer data from/to the ATAPI device. 4709c6fd2807SJeff Garzik * @qc: Command on going 4710c6fd2807SJeff Garzik * 4711c6fd2807SJeff Garzik * Transfer Transfer data from/to the ATAPI device. 4712c6fd2807SJeff Garzik * 4713c6fd2807SJeff Garzik * LOCKING: 4714c6fd2807SJeff Garzik * Inherited from caller. 4715c6fd2807SJeff Garzik */ 4716c6fd2807SJeff Garzik 4717c6fd2807SJeff Garzik static void atapi_pio_bytes(struct ata_queued_cmd *qc) 4718c6fd2807SJeff Garzik { 4719c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 4720c6fd2807SJeff Garzik struct ata_device *dev = qc->dev; 4721c6fd2807SJeff Garzik unsigned int ireason, bc_lo, bc_hi, bytes; 4722c6fd2807SJeff Garzik int i_write, do_write = (qc->tf.flags & ATA_TFLAG_WRITE) ? 1 : 0; 4723c6fd2807SJeff Garzik 4724c6fd2807SJeff Garzik /* Abuse qc->result_tf for temp storage of intermediate TF 4725c6fd2807SJeff Garzik * here to save some kernel stack usage. 4726c6fd2807SJeff Garzik * For normal completion, qc->result_tf is not relevant. For 4727c6fd2807SJeff Garzik * error, qc->result_tf is later overwritten by ata_qc_complete(). 4728c6fd2807SJeff Garzik * So, the correctness of qc->result_tf is not affected. 4729c6fd2807SJeff Garzik */ 4730c6fd2807SJeff Garzik ap->ops->tf_read(ap, &qc->result_tf); 4731c6fd2807SJeff Garzik ireason = qc->result_tf.nsect; 4732c6fd2807SJeff Garzik bc_lo = qc->result_tf.lbam; 4733c6fd2807SJeff Garzik bc_hi = qc->result_tf.lbah; 4734c6fd2807SJeff Garzik bytes = (bc_hi << 8) | bc_lo; 4735c6fd2807SJeff Garzik 4736c6fd2807SJeff Garzik /* shall be cleared to zero, indicating xfer of data */ 4737c6fd2807SJeff Garzik if (ireason & (1 << 0)) 4738c6fd2807SJeff Garzik goto err_out; 4739c6fd2807SJeff Garzik 4740c6fd2807SJeff Garzik /* make sure transfer direction matches expected */ 4741c6fd2807SJeff Garzik i_write = ((ireason & (1 << 1)) == 0) ? 1 : 0; 4742c6fd2807SJeff Garzik if (do_write != i_write) 4743c6fd2807SJeff Garzik goto err_out; 4744c6fd2807SJeff Garzik 474544877b4eSTejun Heo VPRINTK("ata%u: xfering %d bytes\n", ap->print_id, bytes); 4746c6fd2807SJeff Garzik 4747c6fd2807SJeff Garzik __atapi_pio_bytes(qc, bytes); 4748c6fd2807SJeff Garzik 4749c6fd2807SJeff Garzik return; 4750c6fd2807SJeff Garzik 4751c6fd2807SJeff Garzik err_out: 4752c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_INFO, "ATAPI check failed\n"); 4753c6fd2807SJeff Garzik qc->err_mask |= AC_ERR_HSM; 4754c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_ERR; 4755c6fd2807SJeff Garzik } 4756c6fd2807SJeff Garzik 4757c6fd2807SJeff Garzik /** 4758c6fd2807SJeff Garzik * ata_hsm_ok_in_wq - Check if the qc can be handled in the workqueue. 4759c6fd2807SJeff Garzik * @ap: the target ata_port 4760c6fd2807SJeff Garzik * @qc: qc on going 4761c6fd2807SJeff Garzik * 4762c6fd2807SJeff Garzik * RETURNS: 4763c6fd2807SJeff Garzik * 1 if ok in workqueue, 0 otherwise. 4764c6fd2807SJeff Garzik */ 4765c6fd2807SJeff Garzik 4766c6fd2807SJeff Garzik static inline int ata_hsm_ok_in_wq(struct ata_port *ap, struct ata_queued_cmd *qc) 4767c6fd2807SJeff Garzik { 4768c6fd2807SJeff Garzik if (qc->tf.flags & ATA_TFLAG_POLLING) 4769c6fd2807SJeff Garzik return 1; 4770c6fd2807SJeff Garzik 4771c6fd2807SJeff Garzik if (ap->hsm_task_state == HSM_ST_FIRST) { 4772c6fd2807SJeff Garzik if (qc->tf.protocol == ATA_PROT_PIO && 4773c6fd2807SJeff Garzik (qc->tf.flags & ATA_TFLAG_WRITE)) 4774c6fd2807SJeff Garzik return 1; 4775c6fd2807SJeff Garzik 4776c6fd2807SJeff Garzik if (is_atapi_taskfile(&qc->tf) && 4777c6fd2807SJeff Garzik !(qc->dev->flags & ATA_DFLAG_CDB_INTR)) 4778c6fd2807SJeff Garzik return 1; 4779c6fd2807SJeff Garzik } 4780c6fd2807SJeff Garzik 4781c6fd2807SJeff Garzik return 0; 4782c6fd2807SJeff Garzik } 4783c6fd2807SJeff Garzik 4784c6fd2807SJeff Garzik /** 4785c6fd2807SJeff Garzik * ata_hsm_qc_complete - finish a qc running on standard HSM 4786c6fd2807SJeff Garzik * @qc: Command to complete 4787c6fd2807SJeff Garzik * @in_wq: 1 if called from workqueue, 0 otherwise 4788c6fd2807SJeff Garzik * 4789c6fd2807SJeff Garzik * Finish @qc which is running on standard HSM. 4790c6fd2807SJeff Garzik * 4791c6fd2807SJeff Garzik * LOCKING: 4792cca3974eSJeff Garzik * If @in_wq is zero, spin_lock_irqsave(host lock). 4793c6fd2807SJeff Garzik * Otherwise, none on entry and grabs host lock. 4794c6fd2807SJeff Garzik */ 4795c6fd2807SJeff Garzik static void ata_hsm_qc_complete(struct ata_queued_cmd *qc, int in_wq) 4796c6fd2807SJeff Garzik { 4797c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 4798c6fd2807SJeff Garzik unsigned long flags; 4799c6fd2807SJeff Garzik 4800c6fd2807SJeff Garzik if (ap->ops->error_handler) { 4801c6fd2807SJeff Garzik if (in_wq) { 4802c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 4803c6fd2807SJeff Garzik 4804cca3974eSJeff Garzik /* EH might have kicked in while host lock is 4805cca3974eSJeff Garzik * released. 4806c6fd2807SJeff Garzik */ 4807c6fd2807SJeff Garzik qc = ata_qc_from_tag(ap, qc->tag); 4808c6fd2807SJeff Garzik if (qc) { 4809c6fd2807SJeff Garzik if (likely(!(qc->err_mask & AC_ERR_HSM))) { 481083625006SAkira Iguchi ap->ops->irq_on(ap); 4811c6fd2807SJeff Garzik ata_qc_complete(qc); 4812c6fd2807SJeff Garzik } else 4813c6fd2807SJeff Garzik ata_port_freeze(ap); 4814c6fd2807SJeff Garzik } 4815c6fd2807SJeff Garzik 4816c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 4817c6fd2807SJeff Garzik } else { 4818c6fd2807SJeff Garzik if (likely(!(qc->err_mask & AC_ERR_HSM))) 4819c6fd2807SJeff Garzik ata_qc_complete(qc); 4820c6fd2807SJeff Garzik else 4821c6fd2807SJeff Garzik ata_port_freeze(ap); 4822c6fd2807SJeff Garzik } 4823c6fd2807SJeff Garzik } else { 4824c6fd2807SJeff Garzik if (in_wq) { 4825c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 482683625006SAkira Iguchi ap->ops->irq_on(ap); 4827c6fd2807SJeff Garzik ata_qc_complete(qc); 4828c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 4829c6fd2807SJeff Garzik } else 4830c6fd2807SJeff Garzik ata_qc_complete(qc); 4831c6fd2807SJeff Garzik } 4832c6fd2807SJeff Garzik } 4833c6fd2807SJeff Garzik 4834c6fd2807SJeff Garzik /** 4835c6fd2807SJeff Garzik * ata_hsm_move - move the HSM to the next state. 4836c6fd2807SJeff Garzik * @ap: the target ata_port 4837c6fd2807SJeff Garzik * @qc: qc on going 4838c6fd2807SJeff Garzik * @status: current device status 4839c6fd2807SJeff Garzik * @in_wq: 1 if called from workqueue, 0 otherwise 4840c6fd2807SJeff Garzik * 4841c6fd2807SJeff Garzik * RETURNS: 4842c6fd2807SJeff Garzik * 1 when poll next status needed, 0 otherwise. 4843c6fd2807SJeff Garzik */ 4844c6fd2807SJeff Garzik int ata_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc, 4845c6fd2807SJeff Garzik u8 status, int in_wq) 4846c6fd2807SJeff Garzik { 4847c6fd2807SJeff Garzik unsigned long flags = 0; 4848c6fd2807SJeff Garzik int poll_next; 4849c6fd2807SJeff Garzik 4850c6fd2807SJeff Garzik WARN_ON((qc->flags & ATA_QCFLAG_ACTIVE) == 0); 4851c6fd2807SJeff Garzik 4852c6fd2807SJeff Garzik /* Make sure ata_qc_issue_prot() does not throw things 4853c6fd2807SJeff Garzik * like DMA polling into the workqueue. Notice that 4854c6fd2807SJeff Garzik * in_wq is not equivalent to (qc->tf.flags & ATA_TFLAG_POLLING). 4855c6fd2807SJeff Garzik */ 4856c6fd2807SJeff Garzik WARN_ON(in_wq != ata_hsm_ok_in_wq(ap, qc)); 4857c6fd2807SJeff Garzik 4858c6fd2807SJeff Garzik fsm_start: 4859c6fd2807SJeff Garzik DPRINTK("ata%u: protocol %d task_state %d (dev_stat 0x%X)\n", 486044877b4eSTejun Heo ap->print_id, qc->tf.protocol, ap->hsm_task_state, status); 4861c6fd2807SJeff Garzik 4862c6fd2807SJeff Garzik switch (ap->hsm_task_state) { 4863c6fd2807SJeff Garzik case HSM_ST_FIRST: 4864c6fd2807SJeff Garzik /* Send first data block or PACKET CDB */ 4865c6fd2807SJeff Garzik 4866c6fd2807SJeff Garzik /* If polling, we will stay in the work queue after 4867c6fd2807SJeff Garzik * sending the data. Otherwise, interrupt handler 4868c6fd2807SJeff Garzik * takes over after sending the data. 4869c6fd2807SJeff Garzik */ 4870c6fd2807SJeff Garzik poll_next = (qc->tf.flags & ATA_TFLAG_POLLING); 4871c6fd2807SJeff Garzik 4872c6fd2807SJeff Garzik /* check device status */ 4873c6fd2807SJeff Garzik if (unlikely((status & ATA_DRQ) == 0)) { 4874c6fd2807SJeff Garzik /* handle BSY=0, DRQ=0 as error */ 4875c6fd2807SJeff Garzik if (likely(status & (ATA_ERR | ATA_DF))) 4876c6fd2807SJeff Garzik /* device stops HSM for abort/error */ 4877c6fd2807SJeff Garzik qc->err_mask |= AC_ERR_DEV; 4878c6fd2807SJeff Garzik else 4879c6fd2807SJeff Garzik /* HSM violation. Let EH handle this */ 4880c6fd2807SJeff Garzik qc->err_mask |= AC_ERR_HSM; 4881c6fd2807SJeff Garzik 4882c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_ERR; 4883c6fd2807SJeff Garzik goto fsm_start; 4884c6fd2807SJeff Garzik } 4885c6fd2807SJeff Garzik 4886c6fd2807SJeff Garzik /* Device should not ask for data transfer (DRQ=1) 4887c6fd2807SJeff Garzik * when it finds something wrong. 4888c6fd2807SJeff Garzik * We ignore DRQ here and stop the HSM by 4889c6fd2807SJeff Garzik * changing hsm_task_state to HSM_ST_ERR and 4890c6fd2807SJeff Garzik * let the EH abort the command or reset the device. 4891c6fd2807SJeff Garzik */ 4892c6fd2807SJeff Garzik if (unlikely(status & (ATA_ERR | ATA_DF))) { 489344877b4eSTejun Heo ata_port_printk(ap, KERN_WARNING, "DRQ=1 with device " 489444877b4eSTejun Heo "error, dev_stat 0x%X\n", status); 4895c6fd2807SJeff Garzik qc->err_mask |= AC_ERR_HSM; 4896c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_ERR; 4897c6fd2807SJeff Garzik goto fsm_start; 4898c6fd2807SJeff Garzik } 4899c6fd2807SJeff Garzik 4900c6fd2807SJeff Garzik /* Send the CDB (atapi) or the first data block (ata pio out). 4901c6fd2807SJeff Garzik * During the state transition, interrupt handler shouldn't 4902c6fd2807SJeff Garzik * be invoked before the data transfer is complete and 4903c6fd2807SJeff Garzik * hsm_task_state is changed. Hence, the following locking. 4904c6fd2807SJeff Garzik */ 4905c6fd2807SJeff Garzik if (in_wq) 4906c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 4907c6fd2807SJeff Garzik 4908c6fd2807SJeff Garzik if (qc->tf.protocol == ATA_PROT_PIO) { 4909c6fd2807SJeff Garzik /* PIO data out protocol. 4910c6fd2807SJeff Garzik * send first data block. 4911c6fd2807SJeff Garzik */ 4912c6fd2807SJeff Garzik 4913c6fd2807SJeff Garzik /* ata_pio_sectors() might change the state 4914c6fd2807SJeff Garzik * to HSM_ST_LAST. so, the state is changed here 4915c6fd2807SJeff Garzik * before ata_pio_sectors(). 4916c6fd2807SJeff Garzik */ 4917c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST; 4918c6fd2807SJeff Garzik ata_pio_sectors(qc); 4919c6fd2807SJeff Garzik ata_altstatus(ap); /* flush */ 4920c6fd2807SJeff Garzik } else 4921c6fd2807SJeff Garzik /* send CDB */ 4922c6fd2807SJeff Garzik atapi_send_cdb(ap, qc); 4923c6fd2807SJeff Garzik 4924c6fd2807SJeff Garzik if (in_wq) 4925c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 4926c6fd2807SJeff Garzik 4927c6fd2807SJeff Garzik /* if polling, ata_pio_task() handles the rest. 4928c6fd2807SJeff Garzik * otherwise, interrupt handler takes over from here. 4929c6fd2807SJeff Garzik */ 4930c6fd2807SJeff Garzik break; 4931c6fd2807SJeff Garzik 4932c6fd2807SJeff Garzik case HSM_ST: 4933c6fd2807SJeff Garzik /* complete command or read/write the data register */ 4934c6fd2807SJeff Garzik if (qc->tf.protocol == ATA_PROT_ATAPI) { 4935c6fd2807SJeff Garzik /* ATAPI PIO protocol */ 4936c6fd2807SJeff Garzik if ((status & ATA_DRQ) == 0) { 4937c6fd2807SJeff Garzik /* No more data to transfer or device error. 4938c6fd2807SJeff Garzik * Device error will be tagged in HSM_ST_LAST. 4939c6fd2807SJeff Garzik */ 4940c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_LAST; 4941c6fd2807SJeff Garzik goto fsm_start; 4942c6fd2807SJeff Garzik } 4943c6fd2807SJeff Garzik 4944c6fd2807SJeff Garzik /* Device should not ask for data transfer (DRQ=1) 4945c6fd2807SJeff Garzik * when it finds something wrong. 4946c6fd2807SJeff Garzik * We ignore DRQ here and stop the HSM by 4947c6fd2807SJeff Garzik * changing hsm_task_state to HSM_ST_ERR and 4948c6fd2807SJeff Garzik * let the EH abort the command or reset the device. 4949c6fd2807SJeff Garzik */ 4950c6fd2807SJeff Garzik if (unlikely(status & (ATA_ERR | ATA_DF))) { 495144877b4eSTejun Heo ata_port_printk(ap, KERN_WARNING, "DRQ=1 with " 495244877b4eSTejun Heo "device error, dev_stat 0x%X\n", 495344877b4eSTejun Heo status); 4954c6fd2807SJeff Garzik qc->err_mask |= AC_ERR_HSM; 4955c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_ERR; 4956c6fd2807SJeff Garzik goto fsm_start; 4957c6fd2807SJeff Garzik } 4958c6fd2807SJeff Garzik 4959c6fd2807SJeff Garzik atapi_pio_bytes(qc); 4960c6fd2807SJeff Garzik 4961c6fd2807SJeff Garzik if (unlikely(ap->hsm_task_state == HSM_ST_ERR)) 4962c6fd2807SJeff Garzik /* bad ireason reported by device */ 4963c6fd2807SJeff Garzik goto fsm_start; 4964c6fd2807SJeff Garzik 4965c6fd2807SJeff Garzik } else { 4966c6fd2807SJeff Garzik /* ATA PIO protocol */ 4967c6fd2807SJeff Garzik if (unlikely((status & ATA_DRQ) == 0)) { 4968c6fd2807SJeff Garzik /* handle BSY=0, DRQ=0 as error */ 4969c6fd2807SJeff Garzik if (likely(status & (ATA_ERR | ATA_DF))) 4970c6fd2807SJeff Garzik /* device stops HSM for abort/error */ 4971c6fd2807SJeff Garzik qc->err_mask |= AC_ERR_DEV; 4972c6fd2807SJeff Garzik else 497355a8e2c8STejun Heo /* HSM violation. Let EH handle this. 497455a8e2c8STejun Heo * Phantom devices also trigger this 497555a8e2c8STejun Heo * condition. Mark hint. 497655a8e2c8STejun Heo */ 497755a8e2c8STejun Heo qc->err_mask |= AC_ERR_HSM | 497855a8e2c8STejun Heo AC_ERR_NODEV_HINT; 4979c6fd2807SJeff Garzik 4980c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_ERR; 4981c6fd2807SJeff Garzik goto fsm_start; 4982c6fd2807SJeff Garzik } 4983c6fd2807SJeff Garzik 4984c6fd2807SJeff Garzik /* For PIO reads, some devices may ask for 4985c6fd2807SJeff Garzik * data transfer (DRQ=1) alone with ERR=1. 4986c6fd2807SJeff Garzik * We respect DRQ here and transfer one 4987c6fd2807SJeff Garzik * block of junk data before changing the 4988c6fd2807SJeff Garzik * hsm_task_state to HSM_ST_ERR. 4989c6fd2807SJeff Garzik * 4990c6fd2807SJeff Garzik * For PIO writes, ERR=1 DRQ=1 doesn't make 4991c6fd2807SJeff Garzik * sense since the data block has been 4992c6fd2807SJeff Garzik * transferred to the device. 4993c6fd2807SJeff Garzik */ 4994c6fd2807SJeff Garzik if (unlikely(status & (ATA_ERR | ATA_DF))) { 4995c6fd2807SJeff Garzik /* data might be corrputed */ 4996c6fd2807SJeff Garzik qc->err_mask |= AC_ERR_DEV; 4997c6fd2807SJeff Garzik 4998c6fd2807SJeff Garzik if (!(qc->tf.flags & ATA_TFLAG_WRITE)) { 4999c6fd2807SJeff Garzik ata_pio_sectors(qc); 5000c6fd2807SJeff Garzik ata_altstatus(ap); 5001c6fd2807SJeff Garzik status = ata_wait_idle(ap); 5002c6fd2807SJeff Garzik } 5003c6fd2807SJeff Garzik 5004c6fd2807SJeff Garzik if (status & (ATA_BUSY | ATA_DRQ)) 5005c6fd2807SJeff Garzik qc->err_mask |= AC_ERR_HSM; 5006c6fd2807SJeff Garzik 5007c6fd2807SJeff Garzik /* ata_pio_sectors() might change the 5008c6fd2807SJeff Garzik * state to HSM_ST_LAST. so, the state 5009c6fd2807SJeff Garzik * is changed after ata_pio_sectors(). 5010c6fd2807SJeff Garzik */ 5011c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_ERR; 5012c6fd2807SJeff Garzik goto fsm_start; 5013c6fd2807SJeff Garzik } 5014c6fd2807SJeff Garzik 5015c6fd2807SJeff Garzik ata_pio_sectors(qc); 5016c6fd2807SJeff Garzik 5017c6fd2807SJeff Garzik if (ap->hsm_task_state == HSM_ST_LAST && 5018c6fd2807SJeff Garzik (!(qc->tf.flags & ATA_TFLAG_WRITE))) { 5019c6fd2807SJeff Garzik /* all data read */ 5020c6fd2807SJeff Garzik ata_altstatus(ap); 5021c6fd2807SJeff Garzik status = ata_wait_idle(ap); 5022c6fd2807SJeff Garzik goto fsm_start; 5023c6fd2807SJeff Garzik } 5024c6fd2807SJeff Garzik } 5025c6fd2807SJeff Garzik 5026c6fd2807SJeff Garzik ata_altstatus(ap); /* flush */ 5027c6fd2807SJeff Garzik poll_next = 1; 5028c6fd2807SJeff Garzik break; 5029c6fd2807SJeff Garzik 5030c6fd2807SJeff Garzik case HSM_ST_LAST: 5031c6fd2807SJeff Garzik if (unlikely(!ata_ok(status))) { 5032c6fd2807SJeff Garzik qc->err_mask |= __ac_err_mask(status); 5033c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_ERR; 5034c6fd2807SJeff Garzik goto fsm_start; 5035c6fd2807SJeff Garzik } 5036c6fd2807SJeff Garzik 5037c6fd2807SJeff Garzik /* no more data to transfer */ 5038c6fd2807SJeff Garzik DPRINTK("ata%u: dev %u command complete, drv_stat 0x%x\n", 503944877b4eSTejun Heo ap->print_id, qc->dev->devno, status); 5040c6fd2807SJeff Garzik 5041c6fd2807SJeff Garzik WARN_ON(qc->err_mask); 5042c6fd2807SJeff Garzik 5043c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_IDLE; 5044c6fd2807SJeff Garzik 5045c6fd2807SJeff Garzik /* complete taskfile transaction */ 5046c6fd2807SJeff Garzik ata_hsm_qc_complete(qc, in_wq); 5047c6fd2807SJeff Garzik 5048c6fd2807SJeff Garzik poll_next = 0; 5049c6fd2807SJeff Garzik break; 5050c6fd2807SJeff Garzik 5051c6fd2807SJeff Garzik case HSM_ST_ERR: 5052c6fd2807SJeff Garzik /* make sure qc->err_mask is available to 5053c6fd2807SJeff Garzik * know what's wrong and recover 5054c6fd2807SJeff Garzik */ 5055c6fd2807SJeff Garzik WARN_ON(qc->err_mask == 0); 5056c6fd2807SJeff Garzik 5057c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_IDLE; 5058c6fd2807SJeff Garzik 5059c6fd2807SJeff Garzik /* complete taskfile transaction */ 5060c6fd2807SJeff Garzik ata_hsm_qc_complete(qc, in_wq); 5061c6fd2807SJeff Garzik 5062c6fd2807SJeff Garzik poll_next = 0; 5063c6fd2807SJeff Garzik break; 5064c6fd2807SJeff Garzik default: 5065c6fd2807SJeff Garzik poll_next = 0; 5066c6fd2807SJeff Garzik BUG(); 5067c6fd2807SJeff Garzik } 5068c6fd2807SJeff Garzik 5069c6fd2807SJeff Garzik return poll_next; 5070c6fd2807SJeff Garzik } 5071c6fd2807SJeff Garzik 507265f27f38SDavid Howells static void ata_pio_task(struct work_struct *work) 5073c6fd2807SJeff Garzik { 507465f27f38SDavid Howells struct ata_port *ap = 507565f27f38SDavid Howells container_of(work, struct ata_port, port_task.work); 507665f27f38SDavid Howells struct ata_queued_cmd *qc = ap->port_task_data; 5077c6fd2807SJeff Garzik u8 status; 5078c6fd2807SJeff Garzik int poll_next; 5079c6fd2807SJeff Garzik 5080c6fd2807SJeff Garzik fsm_start: 5081c6fd2807SJeff Garzik WARN_ON(ap->hsm_task_state == HSM_ST_IDLE); 5082c6fd2807SJeff Garzik 5083c6fd2807SJeff Garzik /* 5084c6fd2807SJeff Garzik * This is purely heuristic. This is a fast path. 5085c6fd2807SJeff Garzik * Sometimes when we enter, BSY will be cleared in 5086c6fd2807SJeff Garzik * a chk-status or two. If not, the drive is probably seeking 5087c6fd2807SJeff Garzik * or something. Snooze for a couple msecs, then 5088c6fd2807SJeff Garzik * chk-status again. If still busy, queue delayed work. 5089c6fd2807SJeff Garzik */ 5090c6fd2807SJeff Garzik status = ata_busy_wait(ap, ATA_BUSY, 5); 5091c6fd2807SJeff Garzik if (status & ATA_BUSY) { 5092c6fd2807SJeff Garzik msleep(2); 5093c6fd2807SJeff Garzik status = ata_busy_wait(ap, ATA_BUSY, 10); 5094c6fd2807SJeff Garzik if (status & ATA_BUSY) { 5095c6fd2807SJeff Garzik ata_port_queue_task(ap, ata_pio_task, qc, ATA_SHORT_PAUSE); 5096c6fd2807SJeff Garzik return; 5097c6fd2807SJeff Garzik } 5098c6fd2807SJeff Garzik } 5099c6fd2807SJeff Garzik 5100c6fd2807SJeff Garzik /* move the HSM */ 5101c6fd2807SJeff Garzik poll_next = ata_hsm_move(ap, qc, status, 1); 5102c6fd2807SJeff Garzik 5103c6fd2807SJeff Garzik /* another command or interrupt handler 5104c6fd2807SJeff Garzik * may be running at this point. 5105c6fd2807SJeff Garzik */ 5106c6fd2807SJeff Garzik if (poll_next) 5107c6fd2807SJeff Garzik goto fsm_start; 5108c6fd2807SJeff Garzik } 5109c6fd2807SJeff Garzik 5110c6fd2807SJeff Garzik /** 5111c6fd2807SJeff Garzik * ata_qc_new - Request an available ATA command, for queueing 5112c6fd2807SJeff Garzik * @ap: Port associated with device @dev 5113c6fd2807SJeff Garzik * @dev: Device from whom we request an available command structure 5114c6fd2807SJeff Garzik * 5115c6fd2807SJeff Garzik * LOCKING: 5116c6fd2807SJeff Garzik * None. 5117c6fd2807SJeff Garzik */ 5118c6fd2807SJeff Garzik 5119c6fd2807SJeff Garzik static struct ata_queued_cmd *ata_qc_new(struct ata_port *ap) 5120c6fd2807SJeff Garzik { 5121c6fd2807SJeff Garzik struct ata_queued_cmd *qc = NULL; 5122c6fd2807SJeff Garzik unsigned int i; 5123c6fd2807SJeff Garzik 5124c6fd2807SJeff Garzik /* no command while frozen */ 5125c6fd2807SJeff Garzik if (unlikely(ap->pflags & ATA_PFLAG_FROZEN)) 5126c6fd2807SJeff Garzik return NULL; 5127c6fd2807SJeff Garzik 5128c6fd2807SJeff Garzik /* the last tag is reserved for internal command. */ 5129c6fd2807SJeff Garzik for (i = 0; i < ATA_MAX_QUEUE - 1; i++) 5130c6fd2807SJeff Garzik if (!test_and_set_bit(i, &ap->qc_allocated)) { 5131c6fd2807SJeff Garzik qc = __ata_qc_from_tag(ap, i); 5132c6fd2807SJeff Garzik break; 5133c6fd2807SJeff Garzik } 5134c6fd2807SJeff Garzik 5135c6fd2807SJeff Garzik if (qc) 5136c6fd2807SJeff Garzik qc->tag = i; 5137c6fd2807SJeff Garzik 5138c6fd2807SJeff Garzik return qc; 5139c6fd2807SJeff Garzik } 5140c6fd2807SJeff Garzik 5141c6fd2807SJeff Garzik /** 5142c6fd2807SJeff Garzik * ata_qc_new_init - Request an available ATA command, and initialize it 5143c6fd2807SJeff Garzik * @dev: Device from whom we request an available command structure 5144c6fd2807SJeff Garzik * 5145c6fd2807SJeff Garzik * LOCKING: 5146c6fd2807SJeff Garzik * None. 5147c6fd2807SJeff Garzik */ 5148c6fd2807SJeff Garzik 5149c6fd2807SJeff Garzik struct ata_queued_cmd *ata_qc_new_init(struct ata_device *dev) 5150c6fd2807SJeff Garzik { 5151c6fd2807SJeff Garzik struct ata_port *ap = dev->ap; 5152c6fd2807SJeff Garzik struct ata_queued_cmd *qc; 5153c6fd2807SJeff Garzik 5154c6fd2807SJeff Garzik qc = ata_qc_new(ap); 5155c6fd2807SJeff Garzik if (qc) { 5156c6fd2807SJeff Garzik qc->scsicmd = NULL; 5157c6fd2807SJeff Garzik qc->ap = ap; 5158c6fd2807SJeff Garzik qc->dev = dev; 5159c6fd2807SJeff Garzik 5160c6fd2807SJeff Garzik ata_qc_reinit(qc); 5161c6fd2807SJeff Garzik } 5162c6fd2807SJeff Garzik 5163c6fd2807SJeff Garzik return qc; 5164c6fd2807SJeff Garzik } 5165c6fd2807SJeff Garzik 5166c6fd2807SJeff Garzik /** 5167c6fd2807SJeff Garzik * ata_qc_free - free unused ata_queued_cmd 5168c6fd2807SJeff Garzik * @qc: Command to complete 5169c6fd2807SJeff Garzik * 5170c6fd2807SJeff Garzik * Designed to free unused ata_queued_cmd object 5171c6fd2807SJeff Garzik * in case something prevents using it. 5172c6fd2807SJeff Garzik * 5173c6fd2807SJeff Garzik * LOCKING: 5174cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 5175c6fd2807SJeff Garzik */ 5176c6fd2807SJeff Garzik void ata_qc_free(struct ata_queued_cmd *qc) 5177c6fd2807SJeff Garzik { 5178c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 5179c6fd2807SJeff Garzik unsigned int tag; 5180c6fd2807SJeff Garzik 5181c6fd2807SJeff Garzik WARN_ON(qc == NULL); /* ata_qc_from_tag _might_ return NULL */ 5182c6fd2807SJeff Garzik 5183c6fd2807SJeff Garzik qc->flags = 0; 5184c6fd2807SJeff Garzik tag = qc->tag; 5185c6fd2807SJeff Garzik if (likely(ata_tag_valid(tag))) { 5186c6fd2807SJeff Garzik qc->tag = ATA_TAG_POISON; 5187c6fd2807SJeff Garzik clear_bit(tag, &ap->qc_allocated); 5188c6fd2807SJeff Garzik } 5189c6fd2807SJeff Garzik } 5190c6fd2807SJeff Garzik 5191c6fd2807SJeff Garzik void __ata_qc_complete(struct ata_queued_cmd *qc) 5192c6fd2807SJeff Garzik { 5193c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 5194c6fd2807SJeff Garzik 5195c6fd2807SJeff Garzik WARN_ON(qc == NULL); /* ata_qc_from_tag _might_ return NULL */ 5196c6fd2807SJeff Garzik WARN_ON(!(qc->flags & ATA_QCFLAG_ACTIVE)); 5197c6fd2807SJeff Garzik 5198c6fd2807SJeff Garzik if (likely(qc->flags & ATA_QCFLAG_DMAMAP)) 5199c6fd2807SJeff Garzik ata_sg_clean(qc); 5200c6fd2807SJeff Garzik 5201c6fd2807SJeff Garzik /* command should be marked inactive atomically with qc completion */ 5202c6fd2807SJeff Garzik if (qc->tf.protocol == ATA_PROT_NCQ) 5203c6fd2807SJeff Garzik ap->sactive &= ~(1 << qc->tag); 5204c6fd2807SJeff Garzik else 5205c6fd2807SJeff Garzik ap->active_tag = ATA_TAG_POISON; 5206c6fd2807SJeff Garzik 5207c6fd2807SJeff Garzik /* atapi: mark qc as inactive to prevent the interrupt handler 5208c6fd2807SJeff Garzik * from completing the command twice later, before the error handler 5209c6fd2807SJeff Garzik * is called. (when rc != 0 and atapi request sense is needed) 5210c6fd2807SJeff Garzik */ 5211c6fd2807SJeff Garzik qc->flags &= ~ATA_QCFLAG_ACTIVE; 5212c6fd2807SJeff Garzik ap->qc_active &= ~(1 << qc->tag); 5213c6fd2807SJeff Garzik 5214c6fd2807SJeff Garzik /* call completion callback */ 5215c6fd2807SJeff Garzik qc->complete_fn(qc); 5216c6fd2807SJeff Garzik } 5217c6fd2807SJeff Garzik 521839599a53STejun Heo static void fill_result_tf(struct ata_queued_cmd *qc) 521939599a53STejun Heo { 522039599a53STejun Heo struct ata_port *ap = qc->ap; 522139599a53STejun Heo 522239599a53STejun Heo qc->result_tf.flags = qc->tf.flags; 52234742d54fSMark Lord ap->ops->tf_read(ap, &qc->result_tf); 522439599a53STejun Heo } 522539599a53STejun Heo 5226c6fd2807SJeff Garzik /** 5227c6fd2807SJeff Garzik * ata_qc_complete - Complete an active ATA command 5228c6fd2807SJeff Garzik * @qc: Command to complete 5229c6fd2807SJeff Garzik * @err_mask: ATA Status register contents 5230c6fd2807SJeff Garzik * 5231c6fd2807SJeff Garzik * Indicate to the mid and upper layers that an ATA 5232c6fd2807SJeff Garzik * command has completed, with either an ok or not-ok status. 5233c6fd2807SJeff Garzik * 5234c6fd2807SJeff Garzik * LOCKING: 5235cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 5236c6fd2807SJeff Garzik */ 5237c6fd2807SJeff Garzik void ata_qc_complete(struct ata_queued_cmd *qc) 5238c6fd2807SJeff Garzik { 5239c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 5240c6fd2807SJeff Garzik 5241c6fd2807SJeff Garzik /* XXX: New EH and old EH use different mechanisms to 5242c6fd2807SJeff Garzik * synchronize EH with regular execution path. 5243c6fd2807SJeff Garzik * 5244c6fd2807SJeff Garzik * In new EH, a failed qc is marked with ATA_QCFLAG_FAILED. 5245c6fd2807SJeff Garzik * Normal execution path is responsible for not accessing a 5246c6fd2807SJeff Garzik * failed qc. libata core enforces the rule by returning NULL 5247c6fd2807SJeff Garzik * from ata_qc_from_tag() for failed qcs. 5248c6fd2807SJeff Garzik * 5249c6fd2807SJeff Garzik * Old EH depends on ata_qc_complete() nullifying completion 5250c6fd2807SJeff Garzik * requests if ATA_QCFLAG_EH_SCHEDULED is set. Old EH does 5251c6fd2807SJeff Garzik * not synchronize with interrupt handler. Only PIO task is 5252c6fd2807SJeff Garzik * taken care of. 5253c6fd2807SJeff Garzik */ 5254c6fd2807SJeff Garzik if (ap->ops->error_handler) { 5255c6fd2807SJeff Garzik WARN_ON(ap->pflags & ATA_PFLAG_FROZEN); 5256c6fd2807SJeff Garzik 5257c6fd2807SJeff Garzik if (unlikely(qc->err_mask)) 5258c6fd2807SJeff Garzik qc->flags |= ATA_QCFLAG_FAILED; 5259c6fd2807SJeff Garzik 5260c6fd2807SJeff Garzik if (unlikely(qc->flags & ATA_QCFLAG_FAILED)) { 5261c6fd2807SJeff Garzik if (!ata_tag_internal(qc->tag)) { 5262c6fd2807SJeff Garzik /* always fill result TF for failed qc */ 526339599a53STejun Heo fill_result_tf(qc); 5264c6fd2807SJeff Garzik ata_qc_schedule_eh(qc); 5265c6fd2807SJeff Garzik return; 5266c6fd2807SJeff Garzik } 5267c6fd2807SJeff Garzik } 5268c6fd2807SJeff Garzik 5269c6fd2807SJeff Garzik /* read result TF if requested */ 5270c6fd2807SJeff Garzik if (qc->flags & ATA_QCFLAG_RESULT_TF) 527139599a53STejun Heo fill_result_tf(qc); 5272c6fd2807SJeff Garzik 5273c6fd2807SJeff Garzik __ata_qc_complete(qc); 5274c6fd2807SJeff Garzik } else { 5275c6fd2807SJeff Garzik if (qc->flags & ATA_QCFLAG_EH_SCHEDULED) 5276c6fd2807SJeff Garzik return; 5277c6fd2807SJeff Garzik 5278c6fd2807SJeff Garzik /* read result TF if failed or requested */ 5279c6fd2807SJeff Garzik if (qc->err_mask || qc->flags & ATA_QCFLAG_RESULT_TF) 528039599a53STejun Heo fill_result_tf(qc); 5281c6fd2807SJeff Garzik 5282c6fd2807SJeff Garzik __ata_qc_complete(qc); 5283c6fd2807SJeff Garzik } 5284c6fd2807SJeff Garzik } 5285c6fd2807SJeff Garzik 5286c6fd2807SJeff Garzik /** 5287c6fd2807SJeff Garzik * ata_qc_complete_multiple - Complete multiple qcs successfully 5288c6fd2807SJeff Garzik * @ap: port in question 5289c6fd2807SJeff Garzik * @qc_active: new qc_active mask 5290c6fd2807SJeff Garzik * @finish_qc: LLDD callback invoked before completing a qc 5291c6fd2807SJeff Garzik * 5292c6fd2807SJeff Garzik * Complete in-flight commands. This functions is meant to be 5293c6fd2807SJeff Garzik * called from low-level driver's interrupt routine to complete 5294c6fd2807SJeff Garzik * requests normally. ap->qc_active and @qc_active is compared 5295c6fd2807SJeff Garzik * and commands are completed accordingly. 5296c6fd2807SJeff Garzik * 5297c6fd2807SJeff Garzik * LOCKING: 5298cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 5299c6fd2807SJeff Garzik * 5300c6fd2807SJeff Garzik * RETURNS: 5301c6fd2807SJeff Garzik * Number of completed commands on success, -errno otherwise. 5302c6fd2807SJeff Garzik */ 5303c6fd2807SJeff Garzik int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active, 5304c6fd2807SJeff Garzik void (*finish_qc)(struct ata_queued_cmd *)) 5305c6fd2807SJeff Garzik { 5306c6fd2807SJeff Garzik int nr_done = 0; 5307c6fd2807SJeff Garzik u32 done_mask; 5308c6fd2807SJeff Garzik int i; 5309c6fd2807SJeff Garzik 5310c6fd2807SJeff Garzik done_mask = ap->qc_active ^ qc_active; 5311c6fd2807SJeff Garzik 5312c6fd2807SJeff Garzik if (unlikely(done_mask & qc_active)) { 5313c6fd2807SJeff Garzik ata_port_printk(ap, KERN_ERR, "illegal qc_active transition " 5314c6fd2807SJeff Garzik "(%08x->%08x)\n", ap->qc_active, qc_active); 5315c6fd2807SJeff Garzik return -EINVAL; 5316c6fd2807SJeff Garzik } 5317c6fd2807SJeff Garzik 5318c6fd2807SJeff Garzik for (i = 0; i < ATA_MAX_QUEUE; i++) { 5319c6fd2807SJeff Garzik struct ata_queued_cmd *qc; 5320c6fd2807SJeff Garzik 5321c6fd2807SJeff Garzik if (!(done_mask & (1 << i))) 5322c6fd2807SJeff Garzik continue; 5323c6fd2807SJeff Garzik 5324c6fd2807SJeff Garzik if ((qc = ata_qc_from_tag(ap, i))) { 5325c6fd2807SJeff Garzik if (finish_qc) 5326c6fd2807SJeff Garzik finish_qc(qc); 5327c6fd2807SJeff Garzik ata_qc_complete(qc); 5328c6fd2807SJeff Garzik nr_done++; 5329c6fd2807SJeff Garzik } 5330c6fd2807SJeff Garzik } 5331c6fd2807SJeff Garzik 5332c6fd2807SJeff Garzik return nr_done; 5333c6fd2807SJeff Garzik } 5334c6fd2807SJeff Garzik 5335c6fd2807SJeff Garzik static inline int ata_should_dma_map(struct ata_queued_cmd *qc) 5336c6fd2807SJeff Garzik { 5337c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 5338c6fd2807SJeff Garzik 5339c6fd2807SJeff Garzik switch (qc->tf.protocol) { 5340c6fd2807SJeff Garzik case ATA_PROT_NCQ: 5341c6fd2807SJeff Garzik case ATA_PROT_DMA: 5342c6fd2807SJeff Garzik case ATA_PROT_ATAPI_DMA: 5343c6fd2807SJeff Garzik return 1; 5344c6fd2807SJeff Garzik 5345c6fd2807SJeff Garzik case ATA_PROT_ATAPI: 5346c6fd2807SJeff Garzik case ATA_PROT_PIO: 5347c6fd2807SJeff Garzik if (ap->flags & ATA_FLAG_PIO_DMA) 5348c6fd2807SJeff Garzik return 1; 5349c6fd2807SJeff Garzik 5350c6fd2807SJeff Garzik /* fall through */ 5351c6fd2807SJeff Garzik 5352c6fd2807SJeff Garzik default: 5353c6fd2807SJeff Garzik return 0; 5354c6fd2807SJeff Garzik } 5355c6fd2807SJeff Garzik 5356c6fd2807SJeff Garzik /* never reached */ 5357c6fd2807SJeff Garzik } 5358c6fd2807SJeff Garzik 5359c6fd2807SJeff Garzik /** 5360c6fd2807SJeff Garzik * ata_qc_issue - issue taskfile to device 5361c6fd2807SJeff Garzik * @qc: command to issue to device 5362c6fd2807SJeff Garzik * 5363c6fd2807SJeff Garzik * Prepare an ATA command to submission to device. 5364c6fd2807SJeff Garzik * This includes mapping the data into a DMA-able 5365c6fd2807SJeff Garzik * area, filling in the S/G table, and finally 5366c6fd2807SJeff Garzik * writing the taskfile to hardware, starting the command. 5367c6fd2807SJeff Garzik * 5368c6fd2807SJeff Garzik * LOCKING: 5369cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 5370c6fd2807SJeff Garzik */ 5371c6fd2807SJeff Garzik void ata_qc_issue(struct ata_queued_cmd *qc) 5372c6fd2807SJeff Garzik { 5373c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 5374c6fd2807SJeff Garzik 5375c6fd2807SJeff Garzik /* Make sure only one non-NCQ command is outstanding. The 5376c6fd2807SJeff Garzik * check is skipped for old EH because it reuses active qc to 5377c6fd2807SJeff Garzik * request ATAPI sense. 5378c6fd2807SJeff Garzik */ 5379c6fd2807SJeff Garzik WARN_ON(ap->ops->error_handler && ata_tag_valid(ap->active_tag)); 5380c6fd2807SJeff Garzik 5381c6fd2807SJeff Garzik if (qc->tf.protocol == ATA_PROT_NCQ) { 5382c6fd2807SJeff Garzik WARN_ON(ap->sactive & (1 << qc->tag)); 5383c6fd2807SJeff Garzik ap->sactive |= 1 << qc->tag; 5384c6fd2807SJeff Garzik } else { 5385c6fd2807SJeff Garzik WARN_ON(ap->sactive); 5386c6fd2807SJeff Garzik ap->active_tag = qc->tag; 5387c6fd2807SJeff Garzik } 5388c6fd2807SJeff Garzik 5389c6fd2807SJeff Garzik qc->flags |= ATA_QCFLAG_ACTIVE; 5390c6fd2807SJeff Garzik ap->qc_active |= 1 << qc->tag; 5391c6fd2807SJeff Garzik 5392c6fd2807SJeff Garzik if (ata_should_dma_map(qc)) { 5393c6fd2807SJeff Garzik if (qc->flags & ATA_QCFLAG_SG) { 5394c6fd2807SJeff Garzik if (ata_sg_setup(qc)) 5395c6fd2807SJeff Garzik goto sg_err; 5396c6fd2807SJeff Garzik } else if (qc->flags & ATA_QCFLAG_SINGLE) { 5397c6fd2807SJeff Garzik if (ata_sg_setup_one(qc)) 5398c6fd2807SJeff Garzik goto sg_err; 5399c6fd2807SJeff Garzik } 5400c6fd2807SJeff Garzik } else { 5401c6fd2807SJeff Garzik qc->flags &= ~ATA_QCFLAG_DMAMAP; 5402c6fd2807SJeff Garzik } 5403c6fd2807SJeff Garzik 5404c6fd2807SJeff Garzik ap->ops->qc_prep(qc); 5405c6fd2807SJeff Garzik 5406c6fd2807SJeff Garzik qc->err_mask |= ap->ops->qc_issue(qc); 5407c6fd2807SJeff Garzik if (unlikely(qc->err_mask)) 5408c6fd2807SJeff Garzik goto err; 5409c6fd2807SJeff Garzik return; 5410c6fd2807SJeff Garzik 5411c6fd2807SJeff Garzik sg_err: 5412c6fd2807SJeff Garzik qc->flags &= ~ATA_QCFLAG_DMAMAP; 5413c6fd2807SJeff Garzik qc->err_mask |= AC_ERR_SYSTEM; 5414c6fd2807SJeff Garzik err: 5415c6fd2807SJeff Garzik ata_qc_complete(qc); 5416c6fd2807SJeff Garzik } 5417c6fd2807SJeff Garzik 5418c6fd2807SJeff Garzik /** 5419c6fd2807SJeff Garzik * ata_qc_issue_prot - issue taskfile to device in proto-dependent manner 5420c6fd2807SJeff Garzik * @qc: command to issue to device 5421c6fd2807SJeff Garzik * 5422c6fd2807SJeff Garzik * Using various libata functions and hooks, this function 5423c6fd2807SJeff Garzik * starts an ATA command. ATA commands are grouped into 5424c6fd2807SJeff Garzik * classes called "protocols", and issuing each type of protocol 5425c6fd2807SJeff Garzik * is slightly different. 5426c6fd2807SJeff Garzik * 5427c6fd2807SJeff Garzik * May be used as the qc_issue() entry in ata_port_operations. 5428c6fd2807SJeff Garzik * 5429c6fd2807SJeff Garzik * LOCKING: 5430cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 5431c6fd2807SJeff Garzik * 5432c6fd2807SJeff Garzik * RETURNS: 5433c6fd2807SJeff Garzik * Zero on success, AC_ERR_* mask on failure 5434c6fd2807SJeff Garzik */ 5435c6fd2807SJeff Garzik 5436c6fd2807SJeff Garzik unsigned int ata_qc_issue_prot(struct ata_queued_cmd *qc) 5437c6fd2807SJeff Garzik { 5438c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 5439c6fd2807SJeff Garzik 5440c6fd2807SJeff Garzik /* Use polling pio if the LLD doesn't handle 5441c6fd2807SJeff Garzik * interrupt driven pio and atapi CDB interrupt. 5442c6fd2807SJeff Garzik */ 5443c6fd2807SJeff Garzik if (ap->flags & ATA_FLAG_PIO_POLLING) { 5444c6fd2807SJeff Garzik switch (qc->tf.protocol) { 5445c6fd2807SJeff Garzik case ATA_PROT_PIO: 5446e3472cbeSAlbert Lee case ATA_PROT_NODATA: 5447c6fd2807SJeff Garzik case ATA_PROT_ATAPI: 5448c6fd2807SJeff Garzik case ATA_PROT_ATAPI_NODATA: 5449c6fd2807SJeff Garzik qc->tf.flags |= ATA_TFLAG_POLLING; 5450c6fd2807SJeff Garzik break; 5451c6fd2807SJeff Garzik case ATA_PROT_ATAPI_DMA: 5452c6fd2807SJeff Garzik if (qc->dev->flags & ATA_DFLAG_CDB_INTR) 5453c6fd2807SJeff Garzik /* see ata_dma_blacklisted() */ 5454c6fd2807SJeff Garzik BUG(); 5455c6fd2807SJeff Garzik break; 5456c6fd2807SJeff Garzik default: 5457c6fd2807SJeff Garzik break; 5458c6fd2807SJeff Garzik } 5459c6fd2807SJeff Garzik } 5460c6fd2807SJeff Garzik 5461c6fd2807SJeff Garzik /* select the device */ 5462c6fd2807SJeff Garzik ata_dev_select(ap, qc->dev->devno, 1, 0); 5463c6fd2807SJeff Garzik 5464c6fd2807SJeff Garzik /* start the command */ 5465c6fd2807SJeff Garzik switch (qc->tf.protocol) { 5466c6fd2807SJeff Garzik case ATA_PROT_NODATA: 5467c6fd2807SJeff Garzik if (qc->tf.flags & ATA_TFLAG_POLLING) 5468c6fd2807SJeff Garzik ata_qc_set_polling(qc); 5469c6fd2807SJeff Garzik 5470c6fd2807SJeff Garzik ata_tf_to_host(ap, &qc->tf); 5471c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_LAST; 5472c6fd2807SJeff Garzik 5473c6fd2807SJeff Garzik if (qc->tf.flags & ATA_TFLAG_POLLING) 5474c6fd2807SJeff Garzik ata_port_queue_task(ap, ata_pio_task, qc, 0); 5475c6fd2807SJeff Garzik 5476c6fd2807SJeff Garzik break; 5477c6fd2807SJeff Garzik 5478c6fd2807SJeff Garzik case ATA_PROT_DMA: 5479c6fd2807SJeff Garzik WARN_ON(qc->tf.flags & ATA_TFLAG_POLLING); 5480c6fd2807SJeff Garzik 5481c6fd2807SJeff Garzik ap->ops->tf_load(ap, &qc->tf); /* load tf registers */ 5482c6fd2807SJeff Garzik ap->ops->bmdma_setup(qc); /* set up bmdma */ 5483c6fd2807SJeff Garzik ap->ops->bmdma_start(qc); /* initiate bmdma */ 5484c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_LAST; 5485c6fd2807SJeff Garzik break; 5486c6fd2807SJeff Garzik 5487c6fd2807SJeff Garzik case ATA_PROT_PIO: 5488c6fd2807SJeff Garzik if (qc->tf.flags & ATA_TFLAG_POLLING) 5489c6fd2807SJeff Garzik ata_qc_set_polling(qc); 5490c6fd2807SJeff Garzik 5491c6fd2807SJeff Garzik ata_tf_to_host(ap, &qc->tf); 5492c6fd2807SJeff Garzik 5493c6fd2807SJeff Garzik if (qc->tf.flags & ATA_TFLAG_WRITE) { 5494c6fd2807SJeff Garzik /* PIO data out protocol */ 5495c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_FIRST; 5496c6fd2807SJeff Garzik ata_port_queue_task(ap, ata_pio_task, qc, 0); 5497c6fd2807SJeff Garzik 5498c6fd2807SJeff Garzik /* always send first data block using 5499c6fd2807SJeff Garzik * the ata_pio_task() codepath. 5500c6fd2807SJeff Garzik */ 5501c6fd2807SJeff Garzik } else { 5502c6fd2807SJeff Garzik /* PIO data in protocol */ 5503c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST; 5504c6fd2807SJeff Garzik 5505c6fd2807SJeff Garzik if (qc->tf.flags & ATA_TFLAG_POLLING) 5506c6fd2807SJeff Garzik ata_port_queue_task(ap, ata_pio_task, qc, 0); 5507c6fd2807SJeff Garzik 5508c6fd2807SJeff Garzik /* if polling, ata_pio_task() handles the rest. 5509c6fd2807SJeff Garzik * otherwise, interrupt handler takes over from here. 5510c6fd2807SJeff Garzik */ 5511c6fd2807SJeff Garzik } 5512c6fd2807SJeff Garzik 5513c6fd2807SJeff Garzik break; 5514c6fd2807SJeff Garzik 5515c6fd2807SJeff Garzik case ATA_PROT_ATAPI: 5516c6fd2807SJeff Garzik case ATA_PROT_ATAPI_NODATA: 5517c6fd2807SJeff Garzik if (qc->tf.flags & ATA_TFLAG_POLLING) 5518c6fd2807SJeff Garzik ata_qc_set_polling(qc); 5519c6fd2807SJeff Garzik 5520c6fd2807SJeff Garzik ata_tf_to_host(ap, &qc->tf); 5521c6fd2807SJeff Garzik 5522c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_FIRST; 5523c6fd2807SJeff Garzik 5524c6fd2807SJeff Garzik /* send cdb by polling if no cdb interrupt */ 5525c6fd2807SJeff Garzik if ((!(qc->dev->flags & ATA_DFLAG_CDB_INTR)) || 5526c6fd2807SJeff Garzik (qc->tf.flags & ATA_TFLAG_POLLING)) 5527c6fd2807SJeff Garzik ata_port_queue_task(ap, ata_pio_task, qc, 0); 5528c6fd2807SJeff Garzik break; 5529c6fd2807SJeff Garzik 5530c6fd2807SJeff Garzik case ATA_PROT_ATAPI_DMA: 5531c6fd2807SJeff Garzik WARN_ON(qc->tf.flags & ATA_TFLAG_POLLING); 5532c6fd2807SJeff Garzik 5533c6fd2807SJeff Garzik ap->ops->tf_load(ap, &qc->tf); /* load tf registers */ 5534c6fd2807SJeff Garzik ap->ops->bmdma_setup(qc); /* set up bmdma */ 5535c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_FIRST; 5536c6fd2807SJeff Garzik 5537c6fd2807SJeff Garzik /* send cdb by polling if no cdb interrupt */ 5538c6fd2807SJeff Garzik if (!(qc->dev->flags & ATA_DFLAG_CDB_INTR)) 5539c6fd2807SJeff Garzik ata_port_queue_task(ap, ata_pio_task, qc, 0); 5540c6fd2807SJeff Garzik break; 5541c6fd2807SJeff Garzik 5542c6fd2807SJeff Garzik default: 5543c6fd2807SJeff Garzik WARN_ON(1); 5544c6fd2807SJeff Garzik return AC_ERR_SYSTEM; 5545c6fd2807SJeff Garzik } 5546c6fd2807SJeff Garzik 5547c6fd2807SJeff Garzik return 0; 5548c6fd2807SJeff Garzik } 5549c6fd2807SJeff Garzik 5550c6fd2807SJeff Garzik /** 5551c6fd2807SJeff Garzik * ata_host_intr - Handle host interrupt for given (port, task) 5552c6fd2807SJeff Garzik * @ap: Port on which interrupt arrived (possibly...) 5553c6fd2807SJeff Garzik * @qc: Taskfile currently active in engine 5554c6fd2807SJeff Garzik * 5555c6fd2807SJeff Garzik * Handle host interrupt for given queued command. Currently, 5556c6fd2807SJeff Garzik * only DMA interrupts are handled. All other commands are 5557c6fd2807SJeff Garzik * handled via polling with interrupts disabled (nIEN bit). 5558c6fd2807SJeff Garzik * 5559c6fd2807SJeff Garzik * LOCKING: 5560cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 5561c6fd2807SJeff Garzik * 5562c6fd2807SJeff Garzik * RETURNS: 5563c6fd2807SJeff Garzik * One if interrupt was handled, zero if not (shared irq). 5564c6fd2807SJeff Garzik */ 5565c6fd2807SJeff Garzik 5566c6fd2807SJeff Garzik inline unsigned int ata_host_intr (struct ata_port *ap, 5567c6fd2807SJeff Garzik struct ata_queued_cmd *qc) 5568c6fd2807SJeff Garzik { 5569ea54763fSTejun Heo struct ata_eh_info *ehi = &ap->eh_info; 5570c6fd2807SJeff Garzik u8 status, host_stat = 0; 5571c6fd2807SJeff Garzik 5572c6fd2807SJeff Garzik VPRINTK("ata%u: protocol %d task_state %d\n", 557344877b4eSTejun Heo ap->print_id, qc->tf.protocol, ap->hsm_task_state); 5574c6fd2807SJeff Garzik 5575c6fd2807SJeff Garzik /* Check whether we are expecting interrupt in this state */ 5576c6fd2807SJeff Garzik switch (ap->hsm_task_state) { 5577c6fd2807SJeff Garzik case HSM_ST_FIRST: 5578c6fd2807SJeff Garzik /* Some pre-ATAPI-4 devices assert INTRQ 5579c6fd2807SJeff Garzik * at this state when ready to receive CDB. 5580c6fd2807SJeff Garzik */ 5581c6fd2807SJeff Garzik 5582c6fd2807SJeff Garzik /* Check the ATA_DFLAG_CDB_INTR flag is enough here. 5583c6fd2807SJeff Garzik * The flag was turned on only for atapi devices. 5584c6fd2807SJeff Garzik * No need to check is_atapi_taskfile(&qc->tf) again. 5585c6fd2807SJeff Garzik */ 5586c6fd2807SJeff Garzik if (!(qc->dev->flags & ATA_DFLAG_CDB_INTR)) 5587c6fd2807SJeff Garzik goto idle_irq; 5588c6fd2807SJeff Garzik break; 5589c6fd2807SJeff Garzik case HSM_ST_LAST: 5590c6fd2807SJeff Garzik if (qc->tf.protocol == ATA_PROT_DMA || 5591c6fd2807SJeff Garzik qc->tf.protocol == ATA_PROT_ATAPI_DMA) { 5592c6fd2807SJeff Garzik /* check status of DMA engine */ 5593c6fd2807SJeff Garzik host_stat = ap->ops->bmdma_status(ap); 559444877b4eSTejun Heo VPRINTK("ata%u: host_stat 0x%X\n", 559544877b4eSTejun Heo ap->print_id, host_stat); 5596c6fd2807SJeff Garzik 5597c6fd2807SJeff Garzik /* if it's not our irq... */ 5598c6fd2807SJeff Garzik if (!(host_stat & ATA_DMA_INTR)) 5599c6fd2807SJeff Garzik goto idle_irq; 5600c6fd2807SJeff Garzik 5601c6fd2807SJeff Garzik /* before we do anything else, clear DMA-Start bit */ 5602c6fd2807SJeff Garzik ap->ops->bmdma_stop(qc); 5603c6fd2807SJeff Garzik 5604c6fd2807SJeff Garzik if (unlikely(host_stat & ATA_DMA_ERR)) { 5605c6fd2807SJeff Garzik /* error when transfering data to/from memory */ 5606c6fd2807SJeff Garzik qc->err_mask |= AC_ERR_HOST_BUS; 5607c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_ERR; 5608c6fd2807SJeff Garzik } 5609c6fd2807SJeff Garzik } 5610c6fd2807SJeff Garzik break; 5611c6fd2807SJeff Garzik case HSM_ST: 5612c6fd2807SJeff Garzik break; 5613c6fd2807SJeff Garzik default: 5614c6fd2807SJeff Garzik goto idle_irq; 5615c6fd2807SJeff Garzik } 5616c6fd2807SJeff Garzik 5617c6fd2807SJeff Garzik /* check altstatus */ 5618c6fd2807SJeff Garzik status = ata_altstatus(ap); 5619c6fd2807SJeff Garzik if (status & ATA_BUSY) 5620c6fd2807SJeff Garzik goto idle_irq; 5621c6fd2807SJeff Garzik 5622c6fd2807SJeff Garzik /* check main status, clearing INTRQ */ 5623c6fd2807SJeff Garzik status = ata_chk_status(ap); 5624c6fd2807SJeff Garzik if (unlikely(status & ATA_BUSY)) 5625c6fd2807SJeff Garzik goto idle_irq; 5626c6fd2807SJeff Garzik 5627c6fd2807SJeff Garzik /* ack bmdma irq events */ 5628c6fd2807SJeff Garzik ap->ops->irq_clear(ap); 5629c6fd2807SJeff Garzik 5630c6fd2807SJeff Garzik ata_hsm_move(ap, qc, status, 0); 5631ea54763fSTejun Heo 5632ea54763fSTejun Heo if (unlikely(qc->err_mask) && (qc->tf.protocol == ATA_PROT_DMA || 5633ea54763fSTejun Heo qc->tf.protocol == ATA_PROT_ATAPI_DMA)) 5634ea54763fSTejun Heo ata_ehi_push_desc(ehi, "BMDMA stat 0x%x", host_stat); 5635ea54763fSTejun Heo 5636c6fd2807SJeff Garzik return 1; /* irq handled */ 5637c6fd2807SJeff Garzik 5638c6fd2807SJeff Garzik idle_irq: 5639c6fd2807SJeff Garzik ap->stats.idle_irq++; 5640c6fd2807SJeff Garzik 5641c6fd2807SJeff Garzik #ifdef ATA_IRQ_TRAP 5642c6fd2807SJeff Garzik if ((ap->stats.idle_irq % 1000) == 0) { 564383625006SAkira Iguchi ap->ops->irq_ack(ap, 0); /* debug trap */ 5644c6fd2807SJeff Garzik ata_port_printk(ap, KERN_WARNING, "irq trap\n"); 5645c6fd2807SJeff Garzik return 1; 5646c6fd2807SJeff Garzik } 5647c6fd2807SJeff Garzik #endif 5648c6fd2807SJeff Garzik return 0; /* irq not handled */ 5649c6fd2807SJeff Garzik } 5650c6fd2807SJeff Garzik 5651c6fd2807SJeff Garzik /** 5652c6fd2807SJeff Garzik * ata_interrupt - Default ATA host interrupt handler 5653c6fd2807SJeff Garzik * @irq: irq line (unused) 5654cca3974eSJeff Garzik * @dev_instance: pointer to our ata_host information structure 5655c6fd2807SJeff Garzik * 5656c6fd2807SJeff Garzik * Default interrupt handler for PCI IDE devices. Calls 5657c6fd2807SJeff Garzik * ata_host_intr() for each port that is not disabled. 5658c6fd2807SJeff Garzik * 5659c6fd2807SJeff Garzik * LOCKING: 5660cca3974eSJeff Garzik * Obtains host lock during operation. 5661c6fd2807SJeff Garzik * 5662c6fd2807SJeff Garzik * RETURNS: 5663c6fd2807SJeff Garzik * IRQ_NONE or IRQ_HANDLED. 5664c6fd2807SJeff Garzik */ 5665c6fd2807SJeff Garzik 56667d12e780SDavid Howells irqreturn_t ata_interrupt (int irq, void *dev_instance) 5667c6fd2807SJeff Garzik { 5668cca3974eSJeff Garzik struct ata_host *host = dev_instance; 5669c6fd2807SJeff Garzik unsigned int i; 5670c6fd2807SJeff Garzik unsigned int handled = 0; 5671c6fd2807SJeff Garzik unsigned long flags; 5672c6fd2807SJeff Garzik 5673c6fd2807SJeff Garzik /* TODO: make _irqsave conditional on x86 PCI IDE legacy mode */ 5674cca3974eSJeff Garzik spin_lock_irqsave(&host->lock, flags); 5675c6fd2807SJeff Garzik 5676cca3974eSJeff Garzik for (i = 0; i < host->n_ports; i++) { 5677c6fd2807SJeff Garzik struct ata_port *ap; 5678c6fd2807SJeff Garzik 5679cca3974eSJeff Garzik ap = host->ports[i]; 5680c6fd2807SJeff Garzik if (ap && 5681c6fd2807SJeff Garzik !(ap->flags & ATA_FLAG_DISABLED)) { 5682c6fd2807SJeff Garzik struct ata_queued_cmd *qc; 5683c6fd2807SJeff Garzik 5684c6fd2807SJeff Garzik qc = ata_qc_from_tag(ap, ap->active_tag); 5685c6fd2807SJeff Garzik if (qc && (!(qc->tf.flags & ATA_TFLAG_POLLING)) && 5686c6fd2807SJeff Garzik (qc->flags & ATA_QCFLAG_ACTIVE)) 5687c6fd2807SJeff Garzik handled |= ata_host_intr(ap, qc); 5688c6fd2807SJeff Garzik } 5689c6fd2807SJeff Garzik } 5690c6fd2807SJeff Garzik 5691cca3974eSJeff Garzik spin_unlock_irqrestore(&host->lock, flags); 5692c6fd2807SJeff Garzik 5693c6fd2807SJeff Garzik return IRQ_RETVAL(handled); 5694c6fd2807SJeff Garzik } 5695c6fd2807SJeff Garzik 5696c6fd2807SJeff Garzik /** 5697c6fd2807SJeff Garzik * sata_scr_valid - test whether SCRs are accessible 5698c6fd2807SJeff Garzik * @ap: ATA port to test SCR accessibility for 5699c6fd2807SJeff Garzik * 5700c6fd2807SJeff Garzik * Test whether SCRs are accessible for @ap. 5701c6fd2807SJeff Garzik * 5702c6fd2807SJeff Garzik * LOCKING: 5703c6fd2807SJeff Garzik * None. 5704c6fd2807SJeff Garzik * 5705c6fd2807SJeff Garzik * RETURNS: 5706c6fd2807SJeff Garzik * 1 if SCRs are accessible, 0 otherwise. 5707c6fd2807SJeff Garzik */ 5708c6fd2807SJeff Garzik int sata_scr_valid(struct ata_port *ap) 5709c6fd2807SJeff Garzik { 5710a16abc0bSTejun Heo return (ap->flags & ATA_FLAG_SATA) && ap->ops->scr_read; 5711c6fd2807SJeff Garzik } 5712c6fd2807SJeff Garzik 5713c6fd2807SJeff Garzik /** 5714c6fd2807SJeff Garzik * sata_scr_read - read SCR register of the specified port 5715c6fd2807SJeff Garzik * @ap: ATA port to read SCR for 5716c6fd2807SJeff Garzik * @reg: SCR to read 5717c6fd2807SJeff Garzik * @val: Place to store read value 5718c6fd2807SJeff Garzik * 5719c6fd2807SJeff Garzik * Read SCR register @reg of @ap into *@val. This function is 5720c6fd2807SJeff Garzik * guaranteed to succeed if the cable type of the port is SATA 5721c6fd2807SJeff Garzik * and the port implements ->scr_read. 5722c6fd2807SJeff Garzik * 5723c6fd2807SJeff Garzik * LOCKING: 5724c6fd2807SJeff Garzik * None. 5725c6fd2807SJeff Garzik * 5726c6fd2807SJeff Garzik * RETURNS: 5727c6fd2807SJeff Garzik * 0 on success, negative errno on failure. 5728c6fd2807SJeff Garzik */ 5729c6fd2807SJeff Garzik int sata_scr_read(struct ata_port *ap, int reg, u32 *val) 5730c6fd2807SJeff Garzik { 5731c6fd2807SJeff Garzik if (sata_scr_valid(ap)) { 5732c6fd2807SJeff Garzik *val = ap->ops->scr_read(ap, reg); 5733c6fd2807SJeff Garzik return 0; 5734c6fd2807SJeff Garzik } 5735c6fd2807SJeff Garzik return -EOPNOTSUPP; 5736c6fd2807SJeff Garzik } 5737c6fd2807SJeff Garzik 5738c6fd2807SJeff Garzik /** 5739c6fd2807SJeff Garzik * sata_scr_write - write SCR register of the specified port 5740c6fd2807SJeff Garzik * @ap: ATA port to write SCR for 5741c6fd2807SJeff Garzik * @reg: SCR to write 5742c6fd2807SJeff Garzik * @val: value to write 5743c6fd2807SJeff Garzik * 5744c6fd2807SJeff Garzik * Write @val to SCR register @reg of @ap. This function is 5745c6fd2807SJeff Garzik * guaranteed to succeed if the cable type of the port is SATA 5746c6fd2807SJeff Garzik * and the port implements ->scr_read. 5747c6fd2807SJeff Garzik * 5748c6fd2807SJeff Garzik * LOCKING: 5749c6fd2807SJeff Garzik * None. 5750c6fd2807SJeff Garzik * 5751c6fd2807SJeff Garzik * RETURNS: 5752c6fd2807SJeff Garzik * 0 on success, negative errno on failure. 5753c6fd2807SJeff Garzik */ 5754c6fd2807SJeff Garzik int sata_scr_write(struct ata_port *ap, int reg, u32 val) 5755c6fd2807SJeff Garzik { 5756c6fd2807SJeff Garzik if (sata_scr_valid(ap)) { 5757c6fd2807SJeff Garzik ap->ops->scr_write(ap, reg, val); 5758c6fd2807SJeff Garzik return 0; 5759c6fd2807SJeff Garzik } 5760c6fd2807SJeff Garzik return -EOPNOTSUPP; 5761c6fd2807SJeff Garzik } 5762c6fd2807SJeff Garzik 5763c6fd2807SJeff Garzik /** 5764c6fd2807SJeff Garzik * sata_scr_write_flush - write SCR register of the specified port and flush 5765c6fd2807SJeff Garzik * @ap: ATA port to write SCR for 5766c6fd2807SJeff Garzik * @reg: SCR to write 5767c6fd2807SJeff Garzik * @val: value to write 5768c6fd2807SJeff Garzik * 5769c6fd2807SJeff Garzik * This function is identical to sata_scr_write() except that this 5770c6fd2807SJeff Garzik * function performs flush after writing to the register. 5771c6fd2807SJeff Garzik * 5772c6fd2807SJeff Garzik * LOCKING: 5773c6fd2807SJeff Garzik * None. 5774c6fd2807SJeff Garzik * 5775c6fd2807SJeff Garzik * RETURNS: 5776c6fd2807SJeff Garzik * 0 on success, negative errno on failure. 5777c6fd2807SJeff Garzik */ 5778c6fd2807SJeff Garzik int sata_scr_write_flush(struct ata_port *ap, int reg, u32 val) 5779c6fd2807SJeff Garzik { 5780c6fd2807SJeff Garzik if (sata_scr_valid(ap)) { 5781c6fd2807SJeff Garzik ap->ops->scr_write(ap, reg, val); 5782c6fd2807SJeff Garzik ap->ops->scr_read(ap, reg); 5783c6fd2807SJeff Garzik return 0; 5784c6fd2807SJeff Garzik } 5785c6fd2807SJeff Garzik return -EOPNOTSUPP; 5786c6fd2807SJeff Garzik } 5787c6fd2807SJeff Garzik 5788c6fd2807SJeff Garzik /** 5789c6fd2807SJeff Garzik * ata_port_online - test whether the given port is online 5790c6fd2807SJeff Garzik * @ap: ATA port to test 5791c6fd2807SJeff Garzik * 5792c6fd2807SJeff Garzik * Test whether @ap is online. Note that this function returns 0 5793c6fd2807SJeff Garzik * if online status of @ap cannot be obtained, so 5794c6fd2807SJeff Garzik * ata_port_online(ap) != !ata_port_offline(ap). 5795c6fd2807SJeff Garzik * 5796c6fd2807SJeff Garzik * LOCKING: 5797c6fd2807SJeff Garzik * None. 5798c6fd2807SJeff Garzik * 5799c6fd2807SJeff Garzik * RETURNS: 5800c6fd2807SJeff Garzik * 1 if the port online status is available and online. 5801c6fd2807SJeff Garzik */ 5802c6fd2807SJeff Garzik int ata_port_online(struct ata_port *ap) 5803c6fd2807SJeff Garzik { 5804c6fd2807SJeff Garzik u32 sstatus; 5805c6fd2807SJeff Garzik 5806c6fd2807SJeff Garzik if (!sata_scr_read(ap, SCR_STATUS, &sstatus) && (sstatus & 0xf) == 0x3) 5807c6fd2807SJeff Garzik return 1; 5808c6fd2807SJeff Garzik return 0; 5809c6fd2807SJeff Garzik } 5810c6fd2807SJeff Garzik 5811c6fd2807SJeff Garzik /** 5812c6fd2807SJeff Garzik * ata_port_offline - test whether the given port is offline 5813c6fd2807SJeff Garzik * @ap: ATA port to test 5814c6fd2807SJeff Garzik * 5815c6fd2807SJeff Garzik * Test whether @ap is offline. Note that this function returns 5816c6fd2807SJeff Garzik * 0 if offline status of @ap cannot be obtained, so 5817c6fd2807SJeff Garzik * ata_port_online(ap) != !ata_port_offline(ap). 5818c6fd2807SJeff Garzik * 5819c6fd2807SJeff Garzik * LOCKING: 5820c6fd2807SJeff Garzik * None. 5821c6fd2807SJeff Garzik * 5822c6fd2807SJeff Garzik * RETURNS: 5823c6fd2807SJeff Garzik * 1 if the port offline status is available and offline. 5824c6fd2807SJeff Garzik */ 5825c6fd2807SJeff Garzik int ata_port_offline(struct ata_port *ap) 5826c6fd2807SJeff Garzik { 5827c6fd2807SJeff Garzik u32 sstatus; 5828c6fd2807SJeff Garzik 5829c6fd2807SJeff Garzik if (!sata_scr_read(ap, SCR_STATUS, &sstatus) && (sstatus & 0xf) != 0x3) 5830c6fd2807SJeff Garzik return 1; 5831c6fd2807SJeff Garzik return 0; 5832c6fd2807SJeff Garzik } 5833c6fd2807SJeff Garzik 5834c6fd2807SJeff Garzik int ata_flush_cache(struct ata_device *dev) 5835c6fd2807SJeff Garzik { 5836c6fd2807SJeff Garzik unsigned int err_mask; 5837c6fd2807SJeff Garzik u8 cmd; 5838c6fd2807SJeff Garzik 5839c6fd2807SJeff Garzik if (!ata_try_flush_cache(dev)) 5840c6fd2807SJeff Garzik return 0; 5841c6fd2807SJeff Garzik 58426fc49adbSTejun Heo if (dev->flags & ATA_DFLAG_FLUSH_EXT) 5843c6fd2807SJeff Garzik cmd = ATA_CMD_FLUSH_EXT; 5844c6fd2807SJeff Garzik else 5845c6fd2807SJeff Garzik cmd = ATA_CMD_FLUSH; 5846c6fd2807SJeff Garzik 5847c6fd2807SJeff Garzik err_mask = ata_do_simple_cmd(dev, cmd); 5848c6fd2807SJeff Garzik if (err_mask) { 5849c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_ERR, "failed to flush cache\n"); 5850c6fd2807SJeff Garzik return -EIO; 5851c6fd2807SJeff Garzik } 5852c6fd2807SJeff Garzik 5853c6fd2807SJeff Garzik return 0; 5854c6fd2807SJeff Garzik } 5855c6fd2807SJeff Garzik 58566ffa01d8STejun Heo #ifdef CONFIG_PM 5857cca3974eSJeff Garzik static int ata_host_request_pm(struct ata_host *host, pm_message_t mesg, 5858cca3974eSJeff Garzik unsigned int action, unsigned int ehi_flags, 5859cca3974eSJeff Garzik int wait) 5860c6fd2807SJeff Garzik { 5861c6fd2807SJeff Garzik unsigned long flags; 5862c6fd2807SJeff Garzik int i, rc; 5863c6fd2807SJeff Garzik 5864cca3974eSJeff Garzik for (i = 0; i < host->n_ports; i++) { 5865cca3974eSJeff Garzik struct ata_port *ap = host->ports[i]; 5866c6fd2807SJeff Garzik 5867c6fd2807SJeff Garzik /* Previous resume operation might still be in 5868c6fd2807SJeff Garzik * progress. Wait for PM_PENDING to clear. 5869c6fd2807SJeff Garzik */ 5870c6fd2807SJeff Garzik if (ap->pflags & ATA_PFLAG_PM_PENDING) { 5871c6fd2807SJeff Garzik ata_port_wait_eh(ap); 5872c6fd2807SJeff Garzik WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING); 5873c6fd2807SJeff Garzik } 5874c6fd2807SJeff Garzik 5875c6fd2807SJeff Garzik /* request PM ops to EH */ 5876c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 5877c6fd2807SJeff Garzik 5878c6fd2807SJeff Garzik ap->pm_mesg = mesg; 5879c6fd2807SJeff Garzik if (wait) { 5880c6fd2807SJeff Garzik rc = 0; 5881c6fd2807SJeff Garzik ap->pm_result = &rc; 5882c6fd2807SJeff Garzik } 5883c6fd2807SJeff Garzik 5884c6fd2807SJeff Garzik ap->pflags |= ATA_PFLAG_PM_PENDING; 5885c6fd2807SJeff Garzik ap->eh_info.action |= action; 5886c6fd2807SJeff Garzik ap->eh_info.flags |= ehi_flags; 5887c6fd2807SJeff Garzik 5888c6fd2807SJeff Garzik ata_port_schedule_eh(ap); 5889c6fd2807SJeff Garzik 5890c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 5891c6fd2807SJeff Garzik 5892c6fd2807SJeff Garzik /* wait and check result */ 5893c6fd2807SJeff Garzik if (wait) { 5894c6fd2807SJeff Garzik ata_port_wait_eh(ap); 5895c6fd2807SJeff Garzik WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING); 5896c6fd2807SJeff Garzik if (rc) 5897c6fd2807SJeff Garzik return rc; 5898c6fd2807SJeff Garzik } 5899c6fd2807SJeff Garzik } 5900c6fd2807SJeff Garzik 5901c6fd2807SJeff Garzik return 0; 5902c6fd2807SJeff Garzik } 5903c6fd2807SJeff Garzik 5904c6fd2807SJeff Garzik /** 5905cca3974eSJeff Garzik * ata_host_suspend - suspend host 5906cca3974eSJeff Garzik * @host: host to suspend 5907c6fd2807SJeff Garzik * @mesg: PM message 5908c6fd2807SJeff Garzik * 5909cca3974eSJeff Garzik * Suspend @host. Actual operation is performed by EH. This 5910c6fd2807SJeff Garzik * function requests EH to perform PM operations and waits for EH 5911c6fd2807SJeff Garzik * to finish. 5912c6fd2807SJeff Garzik * 5913c6fd2807SJeff Garzik * LOCKING: 5914c6fd2807SJeff Garzik * Kernel thread context (may sleep). 5915c6fd2807SJeff Garzik * 5916c6fd2807SJeff Garzik * RETURNS: 5917c6fd2807SJeff Garzik * 0 on success, -errno on failure. 5918c6fd2807SJeff Garzik */ 5919cca3974eSJeff Garzik int ata_host_suspend(struct ata_host *host, pm_message_t mesg) 5920c6fd2807SJeff Garzik { 59219666f400STejun Heo int rc; 5922c6fd2807SJeff Garzik 5923cca3974eSJeff Garzik rc = ata_host_request_pm(host, mesg, 0, ATA_EHI_QUIET, 1); 59249666f400STejun Heo if (rc == 0) 5925cca3974eSJeff Garzik host->dev->power.power_state = mesg; 5926c6fd2807SJeff Garzik return rc; 5927c6fd2807SJeff Garzik } 5928c6fd2807SJeff Garzik 5929c6fd2807SJeff Garzik /** 5930cca3974eSJeff Garzik * ata_host_resume - resume host 5931cca3974eSJeff Garzik * @host: host to resume 5932c6fd2807SJeff Garzik * 5933cca3974eSJeff Garzik * Resume @host. Actual operation is performed by EH. This 5934c6fd2807SJeff Garzik * function requests EH to perform PM operations and returns. 5935c6fd2807SJeff Garzik * Note that all resume operations are performed parallely. 5936c6fd2807SJeff Garzik * 5937c6fd2807SJeff Garzik * LOCKING: 5938c6fd2807SJeff Garzik * Kernel thread context (may sleep). 5939c6fd2807SJeff Garzik */ 5940cca3974eSJeff Garzik void ata_host_resume(struct ata_host *host) 5941c6fd2807SJeff Garzik { 5942cca3974eSJeff Garzik ata_host_request_pm(host, PMSG_ON, ATA_EH_SOFTRESET, 5943c6fd2807SJeff Garzik ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET, 0); 5944cca3974eSJeff Garzik host->dev->power.power_state = PMSG_ON; 5945c6fd2807SJeff Garzik } 59466ffa01d8STejun Heo #endif 5947c6fd2807SJeff Garzik 5948c6fd2807SJeff Garzik /** 5949c6fd2807SJeff Garzik * ata_port_start - Set port up for dma. 5950c6fd2807SJeff Garzik * @ap: Port to initialize 5951c6fd2807SJeff Garzik * 5952c6fd2807SJeff Garzik * Called just after data structures for each port are 5953c6fd2807SJeff Garzik * initialized. Allocates space for PRD table. 5954c6fd2807SJeff Garzik * 5955c6fd2807SJeff Garzik * May be used as the port_start() entry in ata_port_operations. 5956c6fd2807SJeff Garzik * 5957c6fd2807SJeff Garzik * LOCKING: 5958c6fd2807SJeff Garzik * Inherited from caller. 5959c6fd2807SJeff Garzik */ 5960c6fd2807SJeff Garzik int ata_port_start(struct ata_port *ap) 5961c6fd2807SJeff Garzik { 5962c6fd2807SJeff Garzik struct device *dev = ap->dev; 5963c6fd2807SJeff Garzik int rc; 5964c6fd2807SJeff Garzik 5965f0d36efdSTejun Heo ap->prd = dmam_alloc_coherent(dev, ATA_PRD_TBL_SZ, &ap->prd_dma, 5966f0d36efdSTejun Heo GFP_KERNEL); 5967c6fd2807SJeff Garzik if (!ap->prd) 5968c6fd2807SJeff Garzik return -ENOMEM; 5969c6fd2807SJeff Garzik 5970c6fd2807SJeff Garzik rc = ata_pad_alloc(ap, dev); 5971f0d36efdSTejun Heo if (rc) 5972c6fd2807SJeff Garzik return rc; 5973c6fd2807SJeff Garzik 5974f0d36efdSTejun Heo DPRINTK("prd alloc, virt %p, dma %llx\n", ap->prd, 5975f0d36efdSTejun Heo (unsigned long long)ap->prd_dma); 5976c6fd2807SJeff Garzik return 0; 5977c6fd2807SJeff Garzik } 5978c6fd2807SJeff Garzik 5979c6fd2807SJeff Garzik /** 5980c6fd2807SJeff Garzik * ata_dev_init - Initialize an ata_device structure 5981c6fd2807SJeff Garzik * @dev: Device structure to initialize 5982c6fd2807SJeff Garzik * 5983c6fd2807SJeff Garzik * Initialize @dev in preparation for probing. 5984c6fd2807SJeff Garzik * 5985c6fd2807SJeff Garzik * LOCKING: 5986c6fd2807SJeff Garzik * Inherited from caller. 5987c6fd2807SJeff Garzik */ 5988c6fd2807SJeff Garzik void ata_dev_init(struct ata_device *dev) 5989c6fd2807SJeff Garzik { 5990c6fd2807SJeff Garzik struct ata_port *ap = dev->ap; 5991c6fd2807SJeff Garzik unsigned long flags; 5992c6fd2807SJeff Garzik 5993c6fd2807SJeff Garzik /* SATA spd limit is bound to the first device */ 5994c6fd2807SJeff Garzik ap->sata_spd_limit = ap->hw_sata_spd_limit; 5995c6fd2807SJeff Garzik 5996c6fd2807SJeff Garzik /* High bits of dev->flags are used to record warm plug 5997c6fd2807SJeff Garzik * requests which occur asynchronously. Synchronize using 5998cca3974eSJeff Garzik * host lock. 5999c6fd2807SJeff Garzik */ 6000c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 6001c6fd2807SJeff Garzik dev->flags &= ~ATA_DFLAG_INIT_MASK; 6002c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 6003c6fd2807SJeff Garzik 6004c6fd2807SJeff Garzik memset((void *)dev + ATA_DEVICE_CLEAR_OFFSET, 0, 6005c6fd2807SJeff Garzik sizeof(*dev) - ATA_DEVICE_CLEAR_OFFSET); 6006c6fd2807SJeff Garzik dev->pio_mask = UINT_MAX; 6007c6fd2807SJeff Garzik dev->mwdma_mask = UINT_MAX; 6008c6fd2807SJeff Garzik dev->udma_mask = UINT_MAX; 6009c6fd2807SJeff Garzik } 6010c6fd2807SJeff Garzik 6011c6fd2807SJeff Garzik /** 6012f3187195STejun Heo * ata_port_alloc - allocate and initialize basic ATA port resources 6013f3187195STejun Heo * @host: ATA host this allocated port belongs to 6014c6fd2807SJeff Garzik * 6015f3187195STejun Heo * Allocate and initialize basic ATA port resources. 6016f3187195STejun Heo * 6017f3187195STejun Heo * RETURNS: 6018f3187195STejun Heo * Allocate ATA port on success, NULL on failure. 6019c6fd2807SJeff Garzik * 6020c6fd2807SJeff Garzik * LOCKING: 6021f3187195STejun Heo * Inherited from calling layer (may sleep). 6022c6fd2807SJeff Garzik */ 6023f3187195STejun Heo struct ata_port *ata_port_alloc(struct ata_host *host) 6024c6fd2807SJeff Garzik { 6025f3187195STejun Heo struct ata_port *ap; 6026c6fd2807SJeff Garzik unsigned int i; 6027c6fd2807SJeff Garzik 6028f3187195STejun Heo DPRINTK("ENTER\n"); 6029f3187195STejun Heo 6030f3187195STejun Heo ap = kzalloc(sizeof(*ap), GFP_KERNEL); 6031f3187195STejun Heo if (!ap) 6032f3187195STejun Heo return NULL; 6033f3187195STejun Heo 6034f4d6d004STejun Heo ap->pflags |= ATA_PFLAG_INITIALIZING; 6035cca3974eSJeff Garzik ap->lock = &host->lock; 6036c6fd2807SJeff Garzik ap->flags = ATA_FLAG_DISABLED; 6037f3187195STejun Heo ap->print_id = -1; 6038c6fd2807SJeff Garzik ap->ctl = ATA_DEVCTL_OBS; 6039cca3974eSJeff Garzik ap->host = host; 6040f3187195STejun Heo ap->dev = host->dev; 6041f3187195STejun Heo 6042c6fd2807SJeff Garzik ap->hw_sata_spd_limit = UINT_MAX; 6043c6fd2807SJeff Garzik ap->active_tag = ATA_TAG_POISON; 6044c6fd2807SJeff Garzik ap->last_ctl = 0xFF; 6045c6fd2807SJeff Garzik 6046c6fd2807SJeff Garzik #if defined(ATA_VERBOSE_DEBUG) 6047c6fd2807SJeff Garzik /* turn on all debugging levels */ 6048c6fd2807SJeff Garzik ap->msg_enable = 0x00FF; 6049c6fd2807SJeff Garzik #elif defined(ATA_DEBUG) 6050c6fd2807SJeff Garzik ap->msg_enable = ATA_MSG_DRV | ATA_MSG_INFO | ATA_MSG_CTL | ATA_MSG_WARN | ATA_MSG_ERR; 6051c6fd2807SJeff Garzik #else 6052c6fd2807SJeff Garzik ap->msg_enable = ATA_MSG_DRV | ATA_MSG_ERR | ATA_MSG_WARN; 6053c6fd2807SJeff Garzik #endif 6054c6fd2807SJeff Garzik 605565f27f38SDavid Howells INIT_DELAYED_WORK(&ap->port_task, NULL); 605665f27f38SDavid Howells INIT_DELAYED_WORK(&ap->hotplug_task, ata_scsi_hotplug); 605765f27f38SDavid Howells INIT_WORK(&ap->scsi_rescan_task, ata_scsi_dev_rescan); 6058c6fd2807SJeff Garzik INIT_LIST_HEAD(&ap->eh_done_q); 6059c6fd2807SJeff Garzik init_waitqueue_head(&ap->eh_wait_q); 6060c6fd2807SJeff Garzik 6061c6fd2807SJeff Garzik ap->cbl = ATA_CBL_NONE; 6062c6fd2807SJeff Garzik 6063c6fd2807SJeff Garzik for (i = 0; i < ATA_MAX_DEVICES; i++) { 6064c6fd2807SJeff Garzik struct ata_device *dev = &ap->device[i]; 6065c6fd2807SJeff Garzik dev->ap = ap; 6066c6fd2807SJeff Garzik dev->devno = i; 6067c6fd2807SJeff Garzik ata_dev_init(dev); 6068c6fd2807SJeff Garzik } 6069c6fd2807SJeff Garzik 6070c6fd2807SJeff Garzik #ifdef ATA_IRQ_TRAP 6071c6fd2807SJeff Garzik ap->stats.unhandled_irq = 1; 6072c6fd2807SJeff Garzik ap->stats.idle_irq = 1; 6073c6fd2807SJeff Garzik #endif 6074c6fd2807SJeff Garzik return ap; 6075c6fd2807SJeff Garzik } 6076c6fd2807SJeff Garzik 6077f0d36efdSTejun Heo static void ata_host_release(struct device *gendev, void *res) 6078f0d36efdSTejun Heo { 6079f0d36efdSTejun Heo struct ata_host *host = dev_get_drvdata(gendev); 6080f0d36efdSTejun Heo int i; 6081f0d36efdSTejun Heo 6082f0d36efdSTejun Heo for (i = 0; i < host->n_ports; i++) { 6083f0d36efdSTejun Heo struct ata_port *ap = host->ports[i]; 6084f0d36efdSTejun Heo 6085ecef7253STejun Heo if (!ap) 6086ecef7253STejun Heo continue; 6087ecef7253STejun Heo 6088ecef7253STejun Heo if ((host->flags & ATA_HOST_STARTED) && ap->ops->port_stop) 6089f0d36efdSTejun Heo ap->ops->port_stop(ap); 6090f0d36efdSTejun Heo } 6091f0d36efdSTejun Heo 6092ecef7253STejun Heo if ((host->flags & ATA_HOST_STARTED) && host->ops->host_stop) 6093f0d36efdSTejun Heo host->ops->host_stop(host); 60941aa56ccaSTejun Heo 60951aa506e4STejun Heo for (i = 0; i < host->n_ports; i++) { 60961aa506e4STejun Heo struct ata_port *ap = host->ports[i]; 60971aa506e4STejun Heo 60984911487aSTejun Heo if (!ap) 60994911487aSTejun Heo continue; 61004911487aSTejun Heo 61014911487aSTejun Heo if (ap->scsi_host) 61021aa506e4STejun Heo scsi_host_put(ap->scsi_host); 61031aa506e4STejun Heo 61044911487aSTejun Heo kfree(ap); 61051aa506e4STejun Heo host->ports[i] = NULL; 61061aa506e4STejun Heo } 61071aa506e4STejun Heo 61081aa56ccaSTejun Heo dev_set_drvdata(gendev, NULL); 6109f0d36efdSTejun Heo } 6110f0d36efdSTejun Heo 6111c6fd2807SJeff Garzik /** 6112f3187195STejun Heo * ata_host_alloc - allocate and init basic ATA host resources 6113f3187195STejun Heo * @dev: generic device this host is associated with 6114f3187195STejun Heo * @max_ports: maximum number of ATA ports associated with this host 6115f3187195STejun Heo * 6116f3187195STejun Heo * Allocate and initialize basic ATA host resources. LLD calls 6117f3187195STejun Heo * this function to allocate a host, initializes it fully and 6118f3187195STejun Heo * attaches it using ata_host_register(). 6119f3187195STejun Heo * 6120f3187195STejun Heo * @max_ports ports are allocated and host->n_ports is 6121f3187195STejun Heo * initialized to @max_ports. The caller is allowed to decrease 6122f3187195STejun Heo * host->n_ports before calling ata_host_register(). The unused 6123f3187195STejun Heo * ports will be automatically freed on registration. 6124f3187195STejun Heo * 6125f3187195STejun Heo * RETURNS: 6126f3187195STejun Heo * Allocate ATA host on success, NULL on failure. 6127f3187195STejun Heo * 6128f3187195STejun Heo * LOCKING: 6129f3187195STejun Heo * Inherited from calling layer (may sleep). 6130f3187195STejun Heo */ 6131f3187195STejun Heo struct ata_host *ata_host_alloc(struct device *dev, int max_ports) 6132f3187195STejun Heo { 6133f3187195STejun Heo struct ata_host *host; 6134f3187195STejun Heo size_t sz; 6135f3187195STejun Heo int i; 6136f3187195STejun Heo 6137f3187195STejun Heo DPRINTK("ENTER\n"); 6138f3187195STejun Heo 6139f3187195STejun Heo if (!devres_open_group(dev, NULL, GFP_KERNEL)) 6140f3187195STejun Heo return NULL; 6141f3187195STejun Heo 6142f3187195STejun Heo /* alloc a container for our list of ATA ports (buses) */ 6143f3187195STejun Heo sz = sizeof(struct ata_host) + (max_ports + 1) * sizeof(void *); 6144f3187195STejun Heo /* alloc a container for our list of ATA ports (buses) */ 6145f3187195STejun Heo host = devres_alloc(ata_host_release, sz, GFP_KERNEL); 6146f3187195STejun Heo if (!host) 6147f3187195STejun Heo goto err_out; 6148f3187195STejun Heo 6149f3187195STejun Heo devres_add(dev, host); 6150f3187195STejun Heo dev_set_drvdata(dev, host); 6151f3187195STejun Heo 6152f3187195STejun Heo spin_lock_init(&host->lock); 6153f3187195STejun Heo host->dev = dev; 6154f3187195STejun Heo host->n_ports = max_ports; 6155f3187195STejun Heo 6156f3187195STejun Heo /* allocate ports bound to this host */ 6157f3187195STejun Heo for (i = 0; i < max_ports; i++) { 6158f3187195STejun Heo struct ata_port *ap; 6159f3187195STejun Heo 6160f3187195STejun Heo ap = ata_port_alloc(host); 6161f3187195STejun Heo if (!ap) 6162f3187195STejun Heo goto err_out; 6163f3187195STejun Heo 6164f3187195STejun Heo ap->port_no = i; 6165f3187195STejun Heo host->ports[i] = ap; 6166f3187195STejun Heo } 6167f3187195STejun Heo 6168f3187195STejun Heo devres_remove_group(dev, NULL); 6169f3187195STejun Heo return host; 6170f3187195STejun Heo 6171f3187195STejun Heo err_out: 6172f3187195STejun Heo devres_release_group(dev, NULL); 6173f3187195STejun Heo return NULL; 6174f3187195STejun Heo } 6175f3187195STejun Heo 6176f3187195STejun Heo /** 6177f5cda257STejun Heo * ata_host_alloc_pinfo - alloc host and init with port_info array 6178f5cda257STejun Heo * @dev: generic device this host is associated with 6179f5cda257STejun Heo * @ppi: array of ATA port_info to initialize host with 6180f5cda257STejun Heo * @n_ports: number of ATA ports attached to this host 6181f5cda257STejun Heo * 6182f5cda257STejun Heo * Allocate ATA host and initialize with info from @ppi. If NULL 6183f5cda257STejun Heo * terminated, @ppi may contain fewer entries than @n_ports. The 6184f5cda257STejun Heo * last entry will be used for the remaining ports. 6185f5cda257STejun Heo * 6186f5cda257STejun Heo * RETURNS: 6187f5cda257STejun Heo * Allocate ATA host on success, NULL on failure. 6188f5cda257STejun Heo * 6189f5cda257STejun Heo * LOCKING: 6190f5cda257STejun Heo * Inherited from calling layer (may sleep). 6191f5cda257STejun Heo */ 6192f5cda257STejun Heo struct ata_host *ata_host_alloc_pinfo(struct device *dev, 6193f5cda257STejun Heo const struct ata_port_info * const * ppi, 6194f5cda257STejun Heo int n_ports) 6195f5cda257STejun Heo { 6196f5cda257STejun Heo const struct ata_port_info *pi; 6197f5cda257STejun Heo struct ata_host *host; 6198f5cda257STejun Heo int i, j; 6199f5cda257STejun Heo 6200f5cda257STejun Heo host = ata_host_alloc(dev, n_ports); 6201f5cda257STejun Heo if (!host) 6202f5cda257STejun Heo return NULL; 6203f5cda257STejun Heo 6204f5cda257STejun Heo for (i = 0, j = 0, pi = NULL; i < host->n_ports; i++) { 6205f5cda257STejun Heo struct ata_port *ap = host->ports[i]; 6206f5cda257STejun Heo 6207f5cda257STejun Heo if (ppi[j]) 6208f5cda257STejun Heo pi = ppi[j++]; 6209f5cda257STejun Heo 6210f5cda257STejun Heo ap->pio_mask = pi->pio_mask; 6211f5cda257STejun Heo ap->mwdma_mask = pi->mwdma_mask; 6212f5cda257STejun Heo ap->udma_mask = pi->udma_mask; 6213f5cda257STejun Heo ap->flags |= pi->flags; 6214f5cda257STejun Heo ap->ops = pi->port_ops; 6215f5cda257STejun Heo 6216f5cda257STejun Heo if (!host->ops && (pi->port_ops != &ata_dummy_port_ops)) 6217f5cda257STejun Heo host->ops = pi->port_ops; 6218f5cda257STejun Heo if (!host->private_data && pi->private_data) 6219f5cda257STejun Heo host->private_data = pi->private_data; 6220f5cda257STejun Heo } 6221f5cda257STejun Heo 6222f5cda257STejun Heo return host; 6223f5cda257STejun Heo } 6224f5cda257STejun Heo 6225f5cda257STejun Heo /** 6226ecef7253STejun Heo * ata_host_start - start and freeze ports of an ATA host 6227ecef7253STejun Heo * @host: ATA host to start ports for 6228ecef7253STejun Heo * 6229ecef7253STejun Heo * Start and then freeze ports of @host. Started status is 6230ecef7253STejun Heo * recorded in host->flags, so this function can be called 6231ecef7253STejun Heo * multiple times. Ports are guaranteed to get started only 6232f3187195STejun Heo * once. If host->ops isn't initialized yet, its set to the 6233f3187195STejun Heo * first non-dummy port ops. 6234ecef7253STejun Heo * 6235ecef7253STejun Heo * LOCKING: 6236ecef7253STejun Heo * Inherited from calling layer (may sleep). 6237ecef7253STejun Heo * 6238ecef7253STejun Heo * RETURNS: 6239ecef7253STejun Heo * 0 if all ports are started successfully, -errno otherwise. 6240ecef7253STejun Heo */ 6241ecef7253STejun Heo int ata_host_start(struct ata_host *host) 6242ecef7253STejun Heo { 6243ecef7253STejun Heo int i, rc; 6244ecef7253STejun Heo 6245ecef7253STejun Heo if (host->flags & ATA_HOST_STARTED) 6246ecef7253STejun Heo return 0; 6247ecef7253STejun Heo 6248ecef7253STejun Heo for (i = 0; i < host->n_ports; i++) { 6249ecef7253STejun Heo struct ata_port *ap = host->ports[i]; 6250ecef7253STejun Heo 6251f3187195STejun Heo if (!host->ops && !ata_port_is_dummy(ap)) 6252f3187195STejun Heo host->ops = ap->ops; 6253f3187195STejun Heo 6254ecef7253STejun Heo if (ap->ops->port_start) { 6255ecef7253STejun Heo rc = ap->ops->port_start(ap); 6256ecef7253STejun Heo if (rc) { 6257ecef7253STejun Heo ata_port_printk(ap, KERN_ERR, "failed to " 6258ecef7253STejun Heo "start port (errno=%d)\n", rc); 6259ecef7253STejun Heo goto err_out; 6260ecef7253STejun Heo } 6261ecef7253STejun Heo } 6262ecef7253STejun Heo 6263ecef7253STejun Heo ata_eh_freeze_port(ap); 6264ecef7253STejun Heo } 6265ecef7253STejun Heo 6266ecef7253STejun Heo host->flags |= ATA_HOST_STARTED; 6267ecef7253STejun Heo return 0; 6268ecef7253STejun Heo 6269ecef7253STejun Heo err_out: 6270ecef7253STejun Heo while (--i >= 0) { 6271ecef7253STejun Heo struct ata_port *ap = host->ports[i]; 6272ecef7253STejun Heo 6273ecef7253STejun Heo if (ap->ops->port_stop) 6274ecef7253STejun Heo ap->ops->port_stop(ap); 6275ecef7253STejun Heo } 6276ecef7253STejun Heo return rc; 6277ecef7253STejun Heo } 6278ecef7253STejun Heo 6279ecef7253STejun Heo /** 6280cca3974eSJeff Garzik * ata_sas_host_init - Initialize a host struct 6281cca3974eSJeff Garzik * @host: host to initialize 6282cca3974eSJeff Garzik * @dev: device host is attached to 6283cca3974eSJeff Garzik * @flags: host flags 6284c6fd2807SJeff Garzik * @ops: port_ops 6285c6fd2807SJeff Garzik * 6286c6fd2807SJeff Garzik * LOCKING: 6287c6fd2807SJeff Garzik * PCI/etc. bus probe sem. 6288c6fd2807SJeff Garzik * 6289c6fd2807SJeff Garzik */ 6290f3187195STejun Heo /* KILLME - the only user left is ipr */ 6291cca3974eSJeff Garzik void ata_host_init(struct ata_host *host, struct device *dev, 6292cca3974eSJeff Garzik unsigned long flags, const struct ata_port_operations *ops) 6293c6fd2807SJeff Garzik { 6294cca3974eSJeff Garzik spin_lock_init(&host->lock); 6295cca3974eSJeff Garzik host->dev = dev; 6296cca3974eSJeff Garzik host->flags = flags; 6297cca3974eSJeff Garzik host->ops = ops; 6298c6fd2807SJeff Garzik } 6299c6fd2807SJeff Garzik 6300c6fd2807SJeff Garzik /** 6301f3187195STejun Heo * ata_host_register - register initialized ATA host 6302f3187195STejun Heo * @host: ATA host to register 6303f3187195STejun Heo * @sht: template for SCSI host 6304c6fd2807SJeff Garzik * 6305f3187195STejun Heo * Register initialized ATA host. @host is allocated using 6306f3187195STejun Heo * ata_host_alloc() and fully initialized by LLD. This function 6307f3187195STejun Heo * starts ports, registers @host with ATA and SCSI layers and 6308f3187195STejun Heo * probe registered devices. 6309c6fd2807SJeff Garzik * 6310c6fd2807SJeff Garzik * LOCKING: 6311f3187195STejun Heo * Inherited from calling layer (may sleep). 6312c6fd2807SJeff Garzik * 6313c6fd2807SJeff Garzik * RETURNS: 6314f3187195STejun Heo * 0 on success, -errno otherwise. 6315c6fd2807SJeff Garzik */ 6316f3187195STejun Heo int ata_host_register(struct ata_host *host, struct scsi_host_template *sht) 6317c6fd2807SJeff Garzik { 6318f3187195STejun Heo int i, rc; 6319c6fd2807SJeff Garzik 6320f3187195STejun Heo /* host must have been started */ 6321f3187195STejun Heo if (!(host->flags & ATA_HOST_STARTED)) { 6322f3187195STejun Heo dev_printk(KERN_ERR, host->dev, 6323f3187195STejun Heo "BUG: trying to register unstarted host\n"); 6324f3187195STejun Heo WARN_ON(1); 6325f3187195STejun Heo return -EINVAL; 632602f076aaSAlan Cox } 6327f0d36efdSTejun Heo 6328f3187195STejun Heo /* Blow away unused ports. This happens when LLD can't 6329f3187195STejun Heo * determine the exact number of ports to allocate at 6330f3187195STejun Heo * allocation time. 6331f3187195STejun Heo */ 6332f3187195STejun Heo for (i = host->n_ports; host->ports[i]; i++) 6333f3187195STejun Heo kfree(host->ports[i]); 6334f0d36efdSTejun Heo 6335f3187195STejun Heo /* give ports names and add SCSI hosts */ 6336f3187195STejun Heo for (i = 0; i < host->n_ports; i++) 6337f3187195STejun Heo host->ports[i]->print_id = ata_print_id++; 6338c6fd2807SJeff Garzik 6339f3187195STejun Heo rc = ata_scsi_add_hosts(host, sht); 6340ecef7253STejun Heo if (rc) 6341f3187195STejun Heo return rc; 6342ecef7253STejun Heo 6343fafbae87STejun Heo /* associate with ACPI nodes */ 6344fafbae87STejun Heo ata_acpi_associate(host); 6345fafbae87STejun Heo 6346f3187195STejun Heo /* set cable, sata_spd_limit and report */ 6347cca3974eSJeff Garzik for (i = 0; i < host->n_ports; i++) { 6348cca3974eSJeff Garzik struct ata_port *ap = host->ports[i]; 6349f3187195STejun Heo int irq_line; 6350c6fd2807SJeff Garzik u32 scontrol; 6351f3187195STejun Heo unsigned long xfer_mask; 6352f3187195STejun Heo 6353f3187195STejun Heo /* set SATA cable type if still unset */ 6354f3187195STejun Heo if (ap->cbl == ATA_CBL_NONE && (ap->flags & ATA_FLAG_SATA)) 6355f3187195STejun Heo ap->cbl = ATA_CBL_SATA; 6356c6fd2807SJeff Garzik 6357c6fd2807SJeff Garzik /* init sata_spd_limit to the current value */ 6358c6fd2807SJeff Garzik if (sata_scr_read(ap, SCR_CONTROL, &scontrol) == 0) { 6359c6fd2807SJeff Garzik int spd = (scontrol >> 4) & 0xf; 6360afe3cc51STejun Heo if (spd) 6361c6fd2807SJeff Garzik ap->hw_sata_spd_limit &= (1 << spd) - 1; 6362c6fd2807SJeff Garzik } 6363c6fd2807SJeff Garzik ap->sata_spd_limit = ap->hw_sata_spd_limit; 6364c6fd2807SJeff Garzik 6365f3187195STejun Heo /* report the secondary IRQ for second channel legacy */ 6366f3187195STejun Heo irq_line = host->irq; 6367f3187195STejun Heo if (i == 1 && host->irq2) 6368f3187195STejun Heo irq_line = host->irq2; 6369f3187195STejun Heo 6370f3187195STejun Heo xfer_mask = ata_pack_xfermask(ap->pio_mask, ap->mwdma_mask, 6371f3187195STejun Heo ap->udma_mask); 6372f3187195STejun Heo 6373f3187195STejun Heo /* print per-port info to dmesg */ 6374f3187195STejun Heo if (!ata_port_is_dummy(ap)) 6375f3187195STejun Heo ata_port_printk(ap, KERN_INFO, "%cATA max %s cmd 0x%p " 6376f3187195STejun Heo "ctl 0x%p bmdma 0x%p irq %d\n", 6377a16abc0bSTejun Heo (ap->flags & ATA_FLAG_SATA) ? 'S' : 'P', 6378f3187195STejun Heo ata_mode_string(xfer_mask), 6379f3187195STejun Heo ap->ioaddr.cmd_addr, 6380f3187195STejun Heo ap->ioaddr.ctl_addr, 6381f3187195STejun Heo ap->ioaddr.bmdma_addr, 6382f3187195STejun Heo irq_line); 6383f3187195STejun Heo else 6384f3187195STejun Heo ata_port_printk(ap, KERN_INFO, "DUMMY\n"); 6385c6fd2807SJeff Garzik } 6386c6fd2807SJeff Garzik 6387f3187195STejun Heo /* perform each probe synchronously */ 6388f3187195STejun Heo DPRINTK("probe begin\n"); 6389f3187195STejun Heo for (i = 0; i < host->n_ports; i++) { 6390f3187195STejun Heo struct ata_port *ap = host->ports[i]; 6391f3187195STejun Heo int rc; 6392f3187195STejun Heo 6393f3187195STejun Heo /* probe */ 6394c6fd2807SJeff Garzik if (ap->ops->error_handler) { 6395c6fd2807SJeff Garzik struct ata_eh_info *ehi = &ap->eh_info; 6396c6fd2807SJeff Garzik unsigned long flags; 6397c6fd2807SJeff Garzik 6398c6fd2807SJeff Garzik ata_port_probe(ap); 6399c6fd2807SJeff Garzik 6400c6fd2807SJeff Garzik /* kick EH for boot probing */ 6401c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 6402c6fd2807SJeff Garzik 6403c6fd2807SJeff Garzik ehi->probe_mask = (1 << ATA_MAX_DEVICES) - 1; 6404c6fd2807SJeff Garzik ehi->action |= ATA_EH_SOFTRESET; 6405c6fd2807SJeff Garzik ehi->flags |= ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET; 6406c6fd2807SJeff Garzik 6407f4d6d004STejun Heo ap->pflags &= ~ATA_PFLAG_INITIALIZING; 6408c6fd2807SJeff Garzik ap->pflags |= ATA_PFLAG_LOADING; 6409c6fd2807SJeff Garzik ata_port_schedule_eh(ap); 6410c6fd2807SJeff Garzik 6411c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 6412c6fd2807SJeff Garzik 6413c6fd2807SJeff Garzik /* wait for EH to finish */ 6414c6fd2807SJeff Garzik ata_port_wait_eh(ap); 6415c6fd2807SJeff Garzik } else { 641644877b4eSTejun Heo DPRINTK("ata%u: bus probe begin\n", ap->print_id); 6417c6fd2807SJeff Garzik rc = ata_bus_probe(ap); 641844877b4eSTejun Heo DPRINTK("ata%u: bus probe end\n", ap->print_id); 6419c6fd2807SJeff Garzik 6420c6fd2807SJeff Garzik if (rc) { 6421c6fd2807SJeff Garzik /* FIXME: do something useful here? 6422c6fd2807SJeff Garzik * Current libata behavior will 6423c6fd2807SJeff Garzik * tear down everything when 6424c6fd2807SJeff Garzik * the module is removed 6425c6fd2807SJeff Garzik * or the h/w is unplugged. 6426c6fd2807SJeff Garzik */ 6427c6fd2807SJeff Garzik } 6428c6fd2807SJeff Garzik } 6429c6fd2807SJeff Garzik } 6430c6fd2807SJeff Garzik 6431c6fd2807SJeff Garzik /* probes are done, now scan each port's disk(s) */ 6432c6fd2807SJeff Garzik DPRINTK("host probe begin\n"); 6433cca3974eSJeff Garzik for (i = 0; i < host->n_ports; i++) { 6434cca3974eSJeff Garzik struct ata_port *ap = host->ports[i]; 6435c6fd2807SJeff Garzik 6436c6fd2807SJeff Garzik ata_scsi_scan_host(ap); 6437c6fd2807SJeff Garzik } 6438c6fd2807SJeff Garzik 6439f3187195STejun Heo return 0; 6440f3187195STejun Heo } 6441f3187195STejun Heo 6442f3187195STejun Heo /** 6443f5cda257STejun Heo * ata_host_activate - start host, request IRQ and register it 6444f5cda257STejun Heo * @host: target ATA host 6445f5cda257STejun Heo * @irq: IRQ to request 6446f5cda257STejun Heo * @irq_handler: irq_handler used when requesting IRQ 6447f5cda257STejun Heo * @irq_flags: irq_flags used when requesting IRQ 6448f5cda257STejun Heo * @sht: scsi_host_template to use when registering the host 6449f5cda257STejun Heo * 6450f5cda257STejun Heo * After allocating an ATA host and initializing it, most libata 6451f5cda257STejun Heo * LLDs perform three steps to activate the host - start host, 6452f5cda257STejun Heo * request IRQ and register it. This helper takes necessasry 6453f5cda257STejun Heo * arguments and performs the three steps in one go. 6454f5cda257STejun Heo * 6455f5cda257STejun Heo * LOCKING: 6456f5cda257STejun Heo * Inherited from calling layer (may sleep). 6457f5cda257STejun Heo * 6458f5cda257STejun Heo * RETURNS: 6459f5cda257STejun Heo * 0 on success, -errno otherwise. 6460f5cda257STejun Heo */ 6461f5cda257STejun Heo int ata_host_activate(struct ata_host *host, int irq, 6462f5cda257STejun Heo irq_handler_t irq_handler, unsigned long irq_flags, 6463f5cda257STejun Heo struct scsi_host_template *sht) 6464f5cda257STejun Heo { 6465f5cda257STejun Heo int rc; 6466f5cda257STejun Heo 6467f5cda257STejun Heo rc = ata_host_start(host); 6468f5cda257STejun Heo if (rc) 6469f5cda257STejun Heo return rc; 6470f5cda257STejun Heo 6471f5cda257STejun Heo rc = devm_request_irq(host->dev, irq, irq_handler, irq_flags, 6472f5cda257STejun Heo dev_driver_string(host->dev), host); 6473f5cda257STejun Heo if (rc) 6474f5cda257STejun Heo return rc; 6475f5cda257STejun Heo 64764031826bSTejun Heo /* Used to print device info at probe */ 64774031826bSTejun Heo host->irq = irq; 64784031826bSTejun Heo 6479f5cda257STejun Heo rc = ata_host_register(host, sht); 6480f5cda257STejun Heo /* if failed, just free the IRQ and leave ports alone */ 6481f5cda257STejun Heo if (rc) 6482f5cda257STejun Heo devm_free_irq(host->dev, irq, host); 6483f5cda257STejun Heo 6484f5cda257STejun Heo return rc; 6485f5cda257STejun Heo } 6486f5cda257STejun Heo 6487f5cda257STejun Heo /** 6488c6fd2807SJeff Garzik * ata_port_detach - Detach ATA port in prepration of device removal 6489c6fd2807SJeff Garzik * @ap: ATA port to be detached 6490c6fd2807SJeff Garzik * 6491c6fd2807SJeff Garzik * Detach all ATA devices and the associated SCSI devices of @ap; 6492c6fd2807SJeff Garzik * then, remove the associated SCSI host. @ap is guaranteed to 6493c6fd2807SJeff Garzik * be quiescent on return from this function. 6494c6fd2807SJeff Garzik * 6495c6fd2807SJeff Garzik * LOCKING: 6496c6fd2807SJeff Garzik * Kernel thread context (may sleep). 6497c6fd2807SJeff Garzik */ 6498c6fd2807SJeff Garzik void ata_port_detach(struct ata_port *ap) 6499c6fd2807SJeff Garzik { 6500c6fd2807SJeff Garzik unsigned long flags; 6501c6fd2807SJeff Garzik int i; 6502c6fd2807SJeff Garzik 6503c6fd2807SJeff Garzik if (!ap->ops->error_handler) 6504c6fd2807SJeff Garzik goto skip_eh; 6505c6fd2807SJeff Garzik 6506c6fd2807SJeff Garzik /* tell EH we're leaving & flush EH */ 6507c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 6508c6fd2807SJeff Garzik ap->pflags |= ATA_PFLAG_UNLOADING; 6509c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 6510c6fd2807SJeff Garzik 6511c6fd2807SJeff Garzik ata_port_wait_eh(ap); 6512c6fd2807SJeff Garzik 6513c6fd2807SJeff Garzik /* EH is now guaranteed to see UNLOADING, so no new device 6514c6fd2807SJeff Garzik * will be attached. Disable all existing devices. 6515c6fd2807SJeff Garzik */ 6516c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 6517c6fd2807SJeff Garzik 6518c6fd2807SJeff Garzik for (i = 0; i < ATA_MAX_DEVICES; i++) 6519c6fd2807SJeff Garzik ata_dev_disable(&ap->device[i]); 6520c6fd2807SJeff Garzik 6521c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 6522c6fd2807SJeff Garzik 6523c6fd2807SJeff Garzik /* Final freeze & EH. All in-flight commands are aborted. EH 6524c6fd2807SJeff Garzik * will be skipped and retrials will be terminated with bad 6525c6fd2807SJeff Garzik * target. 6526c6fd2807SJeff Garzik */ 6527c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 6528c6fd2807SJeff Garzik ata_port_freeze(ap); /* won't be thawed */ 6529c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 6530c6fd2807SJeff Garzik 6531c6fd2807SJeff Garzik ata_port_wait_eh(ap); 653245a66c1cSOleg Nesterov cancel_rearming_delayed_work(&ap->hotplug_task); 6533c6fd2807SJeff Garzik 6534c6fd2807SJeff Garzik skip_eh: 6535c6fd2807SJeff Garzik /* remove the associated SCSI host */ 6536cca3974eSJeff Garzik scsi_remove_host(ap->scsi_host); 6537c6fd2807SJeff Garzik } 6538c6fd2807SJeff Garzik 6539c6fd2807SJeff Garzik /** 65400529c159STejun Heo * ata_host_detach - Detach all ports of an ATA host 65410529c159STejun Heo * @host: Host to detach 65420529c159STejun Heo * 65430529c159STejun Heo * Detach all ports of @host. 65440529c159STejun Heo * 65450529c159STejun Heo * LOCKING: 65460529c159STejun Heo * Kernel thread context (may sleep). 65470529c159STejun Heo */ 65480529c159STejun Heo void ata_host_detach(struct ata_host *host) 65490529c159STejun Heo { 65500529c159STejun Heo int i; 65510529c159STejun Heo 65520529c159STejun Heo for (i = 0; i < host->n_ports; i++) 65530529c159STejun Heo ata_port_detach(host->ports[i]); 65540529c159STejun Heo } 65550529c159STejun Heo 6556c6fd2807SJeff Garzik /** 6557c6fd2807SJeff Garzik * ata_std_ports - initialize ioaddr with standard port offsets. 6558c6fd2807SJeff Garzik * @ioaddr: IO address structure to be initialized 6559c6fd2807SJeff Garzik * 6560c6fd2807SJeff Garzik * Utility function which initializes data_addr, error_addr, 6561c6fd2807SJeff Garzik * feature_addr, nsect_addr, lbal_addr, lbam_addr, lbah_addr, 6562c6fd2807SJeff Garzik * device_addr, status_addr, and command_addr to standard offsets 6563c6fd2807SJeff Garzik * relative to cmd_addr. 6564c6fd2807SJeff Garzik * 6565c6fd2807SJeff Garzik * Does not set ctl_addr, altstatus_addr, bmdma_addr, or scr_addr. 6566c6fd2807SJeff Garzik */ 6567c6fd2807SJeff Garzik 6568c6fd2807SJeff Garzik void ata_std_ports(struct ata_ioports *ioaddr) 6569c6fd2807SJeff Garzik { 6570c6fd2807SJeff Garzik ioaddr->data_addr = ioaddr->cmd_addr + ATA_REG_DATA; 6571c6fd2807SJeff Garzik ioaddr->error_addr = ioaddr->cmd_addr + ATA_REG_ERR; 6572c6fd2807SJeff Garzik ioaddr->feature_addr = ioaddr->cmd_addr + ATA_REG_FEATURE; 6573c6fd2807SJeff Garzik ioaddr->nsect_addr = ioaddr->cmd_addr + ATA_REG_NSECT; 6574c6fd2807SJeff Garzik ioaddr->lbal_addr = ioaddr->cmd_addr + ATA_REG_LBAL; 6575c6fd2807SJeff Garzik ioaddr->lbam_addr = ioaddr->cmd_addr + ATA_REG_LBAM; 6576c6fd2807SJeff Garzik ioaddr->lbah_addr = ioaddr->cmd_addr + ATA_REG_LBAH; 6577c6fd2807SJeff Garzik ioaddr->device_addr = ioaddr->cmd_addr + ATA_REG_DEVICE; 6578c6fd2807SJeff Garzik ioaddr->status_addr = ioaddr->cmd_addr + ATA_REG_STATUS; 6579c6fd2807SJeff Garzik ioaddr->command_addr = ioaddr->cmd_addr + ATA_REG_CMD; 6580c6fd2807SJeff Garzik } 6581c6fd2807SJeff Garzik 6582c6fd2807SJeff Garzik 6583c6fd2807SJeff Garzik #ifdef CONFIG_PCI 6584c6fd2807SJeff Garzik 6585c6fd2807SJeff Garzik /** 6586c6fd2807SJeff Garzik * ata_pci_remove_one - PCI layer callback for device removal 6587c6fd2807SJeff Garzik * @pdev: PCI device that was removed 6588c6fd2807SJeff Garzik * 6589b878ca5dSTejun Heo * PCI layer indicates to libata via this hook that hot-unplug or 6590b878ca5dSTejun Heo * module unload event has occurred. Detach all ports. Resource 6591b878ca5dSTejun Heo * release is handled via devres. 6592c6fd2807SJeff Garzik * 6593c6fd2807SJeff Garzik * LOCKING: 6594c6fd2807SJeff Garzik * Inherited from PCI layer (may sleep). 6595c6fd2807SJeff Garzik */ 6596c6fd2807SJeff Garzik void ata_pci_remove_one(struct pci_dev *pdev) 6597c6fd2807SJeff Garzik { 6598c6fd2807SJeff Garzik struct device *dev = pci_dev_to_dev(pdev); 6599cca3974eSJeff Garzik struct ata_host *host = dev_get_drvdata(dev); 6600c6fd2807SJeff Garzik 6601f0d36efdSTejun Heo ata_host_detach(host); 6602c6fd2807SJeff Garzik } 6603c6fd2807SJeff Garzik 6604c6fd2807SJeff Garzik /* move to PCI subsystem */ 6605c6fd2807SJeff Garzik int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits) 6606c6fd2807SJeff Garzik { 6607c6fd2807SJeff Garzik unsigned long tmp = 0; 6608c6fd2807SJeff Garzik 6609c6fd2807SJeff Garzik switch (bits->width) { 6610c6fd2807SJeff Garzik case 1: { 6611c6fd2807SJeff Garzik u8 tmp8 = 0; 6612c6fd2807SJeff Garzik pci_read_config_byte(pdev, bits->reg, &tmp8); 6613c6fd2807SJeff Garzik tmp = tmp8; 6614c6fd2807SJeff Garzik break; 6615c6fd2807SJeff Garzik } 6616c6fd2807SJeff Garzik case 2: { 6617c6fd2807SJeff Garzik u16 tmp16 = 0; 6618c6fd2807SJeff Garzik pci_read_config_word(pdev, bits->reg, &tmp16); 6619c6fd2807SJeff Garzik tmp = tmp16; 6620c6fd2807SJeff Garzik break; 6621c6fd2807SJeff Garzik } 6622c6fd2807SJeff Garzik case 4: { 6623c6fd2807SJeff Garzik u32 tmp32 = 0; 6624c6fd2807SJeff Garzik pci_read_config_dword(pdev, bits->reg, &tmp32); 6625c6fd2807SJeff Garzik tmp = tmp32; 6626c6fd2807SJeff Garzik break; 6627c6fd2807SJeff Garzik } 6628c6fd2807SJeff Garzik 6629c6fd2807SJeff Garzik default: 6630c6fd2807SJeff Garzik return -EINVAL; 6631c6fd2807SJeff Garzik } 6632c6fd2807SJeff Garzik 6633c6fd2807SJeff Garzik tmp &= bits->mask; 6634c6fd2807SJeff Garzik 6635c6fd2807SJeff Garzik return (tmp == bits->val) ? 1 : 0; 6636c6fd2807SJeff Garzik } 6637c6fd2807SJeff Garzik 66386ffa01d8STejun Heo #ifdef CONFIG_PM 6639c6fd2807SJeff Garzik void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg) 6640c6fd2807SJeff Garzik { 6641c6fd2807SJeff Garzik pci_save_state(pdev); 6642c6fd2807SJeff Garzik pci_disable_device(pdev); 66434c90d971STejun Heo 66444c90d971STejun Heo if (mesg.event == PM_EVENT_SUSPEND) 6645c6fd2807SJeff Garzik pci_set_power_state(pdev, PCI_D3hot); 6646c6fd2807SJeff Garzik } 6647c6fd2807SJeff Garzik 6648553c4aa6STejun Heo int ata_pci_device_do_resume(struct pci_dev *pdev) 6649c6fd2807SJeff Garzik { 6650553c4aa6STejun Heo int rc; 6651553c4aa6STejun Heo 6652c6fd2807SJeff Garzik pci_set_power_state(pdev, PCI_D0); 6653c6fd2807SJeff Garzik pci_restore_state(pdev); 6654553c4aa6STejun Heo 6655f0d36efdSTejun Heo rc = pcim_enable_device(pdev); 6656553c4aa6STejun Heo if (rc) { 6657553c4aa6STejun Heo dev_printk(KERN_ERR, &pdev->dev, 6658553c4aa6STejun Heo "failed to enable device after resume (%d)\n", rc); 6659553c4aa6STejun Heo return rc; 6660553c4aa6STejun Heo } 6661553c4aa6STejun Heo 6662c6fd2807SJeff Garzik pci_set_master(pdev); 6663553c4aa6STejun Heo return 0; 6664c6fd2807SJeff Garzik } 6665c6fd2807SJeff Garzik 6666c6fd2807SJeff Garzik int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg) 6667c6fd2807SJeff Garzik { 6668cca3974eSJeff Garzik struct ata_host *host = dev_get_drvdata(&pdev->dev); 6669c6fd2807SJeff Garzik int rc = 0; 6670c6fd2807SJeff Garzik 6671cca3974eSJeff Garzik rc = ata_host_suspend(host, mesg); 6672c6fd2807SJeff Garzik if (rc) 6673c6fd2807SJeff Garzik return rc; 6674c6fd2807SJeff Garzik 6675c6fd2807SJeff Garzik ata_pci_device_do_suspend(pdev, mesg); 6676c6fd2807SJeff Garzik 6677c6fd2807SJeff Garzik return 0; 6678c6fd2807SJeff Garzik } 6679c6fd2807SJeff Garzik 6680c6fd2807SJeff Garzik int ata_pci_device_resume(struct pci_dev *pdev) 6681c6fd2807SJeff Garzik { 6682cca3974eSJeff Garzik struct ata_host *host = dev_get_drvdata(&pdev->dev); 6683553c4aa6STejun Heo int rc; 6684c6fd2807SJeff Garzik 6685553c4aa6STejun Heo rc = ata_pci_device_do_resume(pdev); 6686553c4aa6STejun Heo if (rc == 0) 6687cca3974eSJeff Garzik ata_host_resume(host); 6688553c4aa6STejun Heo return rc; 6689c6fd2807SJeff Garzik } 66906ffa01d8STejun Heo #endif /* CONFIG_PM */ 66916ffa01d8STejun Heo 6692c6fd2807SJeff Garzik #endif /* CONFIG_PCI */ 6693c6fd2807SJeff Garzik 6694c6fd2807SJeff Garzik 6695c6fd2807SJeff Garzik static int __init ata_init(void) 6696c6fd2807SJeff Garzik { 6697c6fd2807SJeff Garzik ata_probe_timeout *= HZ; 6698c6fd2807SJeff Garzik ata_wq = create_workqueue("ata"); 6699c6fd2807SJeff Garzik if (!ata_wq) 6700c6fd2807SJeff Garzik return -ENOMEM; 6701c6fd2807SJeff Garzik 6702c6fd2807SJeff Garzik ata_aux_wq = create_singlethread_workqueue("ata_aux"); 6703c6fd2807SJeff Garzik if (!ata_aux_wq) { 6704c6fd2807SJeff Garzik destroy_workqueue(ata_wq); 6705c6fd2807SJeff Garzik return -ENOMEM; 6706c6fd2807SJeff Garzik } 6707c6fd2807SJeff Garzik 6708c6fd2807SJeff Garzik printk(KERN_DEBUG "libata version " DRV_VERSION " loaded.\n"); 6709c6fd2807SJeff Garzik return 0; 6710c6fd2807SJeff Garzik } 6711c6fd2807SJeff Garzik 6712c6fd2807SJeff Garzik static void __exit ata_exit(void) 6713c6fd2807SJeff Garzik { 6714c6fd2807SJeff Garzik destroy_workqueue(ata_wq); 6715c6fd2807SJeff Garzik destroy_workqueue(ata_aux_wq); 6716c6fd2807SJeff Garzik } 6717c6fd2807SJeff Garzik 6718a4625085SBrian King subsys_initcall(ata_init); 6719c6fd2807SJeff Garzik module_exit(ata_exit); 6720c6fd2807SJeff Garzik 6721c6fd2807SJeff Garzik static unsigned long ratelimit_time; 6722c6fd2807SJeff Garzik static DEFINE_SPINLOCK(ata_ratelimit_lock); 6723c6fd2807SJeff Garzik 6724c6fd2807SJeff Garzik int ata_ratelimit(void) 6725c6fd2807SJeff Garzik { 6726c6fd2807SJeff Garzik int rc; 6727c6fd2807SJeff Garzik unsigned long flags; 6728c6fd2807SJeff Garzik 6729c6fd2807SJeff Garzik spin_lock_irqsave(&ata_ratelimit_lock, flags); 6730c6fd2807SJeff Garzik 6731c6fd2807SJeff Garzik if (time_after(jiffies, ratelimit_time)) { 6732c6fd2807SJeff Garzik rc = 1; 6733c6fd2807SJeff Garzik ratelimit_time = jiffies + (HZ/5); 6734c6fd2807SJeff Garzik } else 6735c6fd2807SJeff Garzik rc = 0; 6736c6fd2807SJeff Garzik 6737c6fd2807SJeff Garzik spin_unlock_irqrestore(&ata_ratelimit_lock, flags); 6738c6fd2807SJeff Garzik 6739c6fd2807SJeff Garzik return rc; 6740c6fd2807SJeff Garzik } 6741c6fd2807SJeff Garzik 6742c6fd2807SJeff Garzik /** 6743c6fd2807SJeff Garzik * ata_wait_register - wait until register value changes 6744c6fd2807SJeff Garzik * @reg: IO-mapped register 6745c6fd2807SJeff Garzik * @mask: Mask to apply to read register value 6746c6fd2807SJeff Garzik * @val: Wait condition 6747c6fd2807SJeff Garzik * @interval_msec: polling interval in milliseconds 6748c6fd2807SJeff Garzik * @timeout_msec: timeout in milliseconds 6749c6fd2807SJeff Garzik * 6750c6fd2807SJeff Garzik * Waiting for some bits of register to change is a common 6751c6fd2807SJeff Garzik * operation for ATA controllers. This function reads 32bit LE 6752c6fd2807SJeff Garzik * IO-mapped register @reg and tests for the following condition. 6753c6fd2807SJeff Garzik * 6754c6fd2807SJeff Garzik * (*@reg & mask) != val 6755c6fd2807SJeff Garzik * 6756c6fd2807SJeff Garzik * If the condition is met, it returns; otherwise, the process is 6757c6fd2807SJeff Garzik * repeated after @interval_msec until timeout. 6758c6fd2807SJeff Garzik * 6759c6fd2807SJeff Garzik * LOCKING: 6760c6fd2807SJeff Garzik * Kernel thread context (may sleep) 6761c6fd2807SJeff Garzik * 6762c6fd2807SJeff Garzik * RETURNS: 6763c6fd2807SJeff Garzik * The final register value. 6764c6fd2807SJeff Garzik */ 6765c6fd2807SJeff Garzik u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val, 6766c6fd2807SJeff Garzik unsigned long interval_msec, 6767c6fd2807SJeff Garzik unsigned long timeout_msec) 6768c6fd2807SJeff Garzik { 6769c6fd2807SJeff Garzik unsigned long timeout; 6770c6fd2807SJeff Garzik u32 tmp; 6771c6fd2807SJeff Garzik 6772c6fd2807SJeff Garzik tmp = ioread32(reg); 6773c6fd2807SJeff Garzik 6774c6fd2807SJeff Garzik /* Calculate timeout _after_ the first read to make sure 6775c6fd2807SJeff Garzik * preceding writes reach the controller before starting to 6776c6fd2807SJeff Garzik * eat away the timeout. 6777c6fd2807SJeff Garzik */ 6778c6fd2807SJeff Garzik timeout = jiffies + (timeout_msec * HZ) / 1000; 6779c6fd2807SJeff Garzik 6780c6fd2807SJeff Garzik while ((tmp & mask) == val && time_before(jiffies, timeout)) { 6781c6fd2807SJeff Garzik msleep(interval_msec); 6782c6fd2807SJeff Garzik tmp = ioread32(reg); 6783c6fd2807SJeff Garzik } 6784c6fd2807SJeff Garzik 6785c6fd2807SJeff Garzik return tmp; 6786c6fd2807SJeff Garzik } 6787c6fd2807SJeff Garzik 6788c6fd2807SJeff Garzik /* 6789c6fd2807SJeff Garzik * Dummy port_ops 6790c6fd2807SJeff Garzik */ 6791c6fd2807SJeff Garzik static void ata_dummy_noret(struct ata_port *ap) { } 6792c6fd2807SJeff Garzik static int ata_dummy_ret0(struct ata_port *ap) { return 0; } 6793c6fd2807SJeff Garzik static void ata_dummy_qc_noret(struct ata_queued_cmd *qc) { } 6794c6fd2807SJeff Garzik 6795c6fd2807SJeff Garzik static u8 ata_dummy_check_status(struct ata_port *ap) 6796c6fd2807SJeff Garzik { 6797c6fd2807SJeff Garzik return ATA_DRDY; 6798c6fd2807SJeff Garzik } 6799c6fd2807SJeff Garzik 6800c6fd2807SJeff Garzik static unsigned int ata_dummy_qc_issue(struct ata_queued_cmd *qc) 6801c6fd2807SJeff Garzik { 6802c6fd2807SJeff Garzik return AC_ERR_SYSTEM; 6803c6fd2807SJeff Garzik } 6804c6fd2807SJeff Garzik 6805c6fd2807SJeff Garzik const struct ata_port_operations ata_dummy_port_ops = { 6806c6fd2807SJeff Garzik .port_disable = ata_port_disable, 6807c6fd2807SJeff Garzik .check_status = ata_dummy_check_status, 6808c6fd2807SJeff Garzik .check_altstatus = ata_dummy_check_status, 6809c6fd2807SJeff Garzik .dev_select = ata_noop_dev_select, 6810c6fd2807SJeff Garzik .qc_prep = ata_noop_qc_prep, 6811c6fd2807SJeff Garzik .qc_issue = ata_dummy_qc_issue, 6812c6fd2807SJeff Garzik .freeze = ata_dummy_noret, 6813c6fd2807SJeff Garzik .thaw = ata_dummy_noret, 6814c6fd2807SJeff Garzik .error_handler = ata_dummy_noret, 6815c6fd2807SJeff Garzik .post_internal_cmd = ata_dummy_qc_noret, 6816c6fd2807SJeff Garzik .irq_clear = ata_dummy_noret, 6817c6fd2807SJeff Garzik .port_start = ata_dummy_ret0, 6818c6fd2807SJeff Garzik .port_stop = ata_dummy_noret, 6819c6fd2807SJeff Garzik }; 6820c6fd2807SJeff Garzik 682121b0ad4fSTejun Heo const struct ata_port_info ata_dummy_port_info = { 682221b0ad4fSTejun Heo .port_ops = &ata_dummy_port_ops, 682321b0ad4fSTejun Heo }; 682421b0ad4fSTejun Heo 6825c6fd2807SJeff Garzik /* 6826c6fd2807SJeff Garzik * libata is essentially a library of internal helper functions for 6827c6fd2807SJeff Garzik * low-level ATA host controller drivers. As such, the API/ABI is 6828c6fd2807SJeff Garzik * likely to change as new drivers are added and updated. 6829c6fd2807SJeff Garzik * Do not depend on ABI/API stability. 6830c6fd2807SJeff Garzik */ 6831c6fd2807SJeff Garzik 6832c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(sata_deb_timing_normal); 6833c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(sata_deb_timing_hotplug); 6834c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(sata_deb_timing_long); 6835c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_dummy_port_ops); 683621b0ad4fSTejun Heo EXPORT_SYMBOL_GPL(ata_dummy_port_info); 6837c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_std_bios_param); 6838c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_std_ports); 6839cca3974eSJeff Garzik EXPORT_SYMBOL_GPL(ata_host_init); 6840f3187195STejun Heo EXPORT_SYMBOL_GPL(ata_host_alloc); 6841f5cda257STejun Heo EXPORT_SYMBOL_GPL(ata_host_alloc_pinfo); 6842ecef7253STejun Heo EXPORT_SYMBOL_GPL(ata_host_start); 6843f3187195STejun Heo EXPORT_SYMBOL_GPL(ata_host_register); 6844f5cda257STejun Heo EXPORT_SYMBOL_GPL(ata_host_activate); 68450529c159STejun Heo EXPORT_SYMBOL_GPL(ata_host_detach); 6846c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_sg_init); 6847c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_sg_init_one); 6848c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_hsm_move); 6849c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_qc_complete); 6850c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_qc_complete_multiple); 6851c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_qc_issue_prot); 6852c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_tf_load); 6853c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_tf_read); 6854c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_noop_dev_select); 6855c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_std_dev_select); 685643727fbcSJeff Garzik EXPORT_SYMBOL_GPL(sata_print_link_status); 6857c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_tf_to_fis); 6858c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_tf_from_fis); 6859c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_check_status); 6860c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_altstatus); 6861c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_exec_command); 6862c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_port_start); 6863d92e74d3SAlan Cox EXPORT_SYMBOL_GPL(ata_sff_port_start); 6864c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_interrupt); 686504351821SAlan EXPORT_SYMBOL_GPL(ata_do_set_mode); 68660d5ff566STejun Heo EXPORT_SYMBOL_GPL(ata_data_xfer); 68670d5ff566STejun Heo EXPORT_SYMBOL_GPL(ata_data_xfer_noirq); 6868c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_qc_prep); 6869d26fc955SAlan Cox EXPORT_SYMBOL_GPL(ata_dumb_qc_prep); 6870c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_noop_qc_prep); 6871c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_bmdma_setup); 6872c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_bmdma_start); 6873c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_bmdma_irq_clear); 6874c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_bmdma_status); 6875c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_bmdma_stop); 6876c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_bmdma_freeze); 6877c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_bmdma_thaw); 6878c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_bmdma_drive_eh); 6879c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_bmdma_error_handler); 6880c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_bmdma_post_internal_cmd); 6881c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_port_probe); 688210305f0fSAlan EXPORT_SYMBOL_GPL(ata_dev_disable); 6883c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(sata_set_spd); 6884c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(sata_phy_debounce); 6885c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(sata_phy_resume); 6886c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(sata_phy_reset); 6887c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(__sata_phy_reset); 6888c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_bus_reset); 6889c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_std_prereset); 6890c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_std_softreset); 6891b6103f6dSTejun Heo EXPORT_SYMBOL_GPL(sata_port_hardreset); 6892c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(sata_std_hardreset); 6893c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_std_postreset); 6894c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_dev_classify); 6895c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_dev_pair); 6896c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_port_disable); 6897c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_ratelimit); 6898c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_wait_register); 6899c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_busy_sleep); 6900d4b2bab4STejun Heo EXPORT_SYMBOL_GPL(ata_wait_ready); 6901c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_port_queue_task); 6902c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_scsi_ioctl); 6903c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_scsi_queuecmd); 6904c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_scsi_slave_config); 6905c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_scsi_slave_destroy); 6906c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_scsi_change_queue_depth); 6907c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_host_intr); 6908c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(sata_scr_valid); 6909c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(sata_scr_read); 6910c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(sata_scr_write); 6911c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(sata_scr_write_flush); 6912c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_port_online); 6913c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_port_offline); 69146ffa01d8STejun Heo #ifdef CONFIG_PM 6915cca3974eSJeff Garzik EXPORT_SYMBOL_GPL(ata_host_suspend); 6916cca3974eSJeff Garzik EXPORT_SYMBOL_GPL(ata_host_resume); 69176ffa01d8STejun Heo #endif /* CONFIG_PM */ 6918c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_id_string); 6919c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_id_c_string); 692010305f0fSAlan EXPORT_SYMBOL_GPL(ata_id_to_dma_mode); 69216919a0a6SAlan Cox EXPORT_SYMBOL_GPL(ata_device_blacklisted); 6922c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_scsi_simulate); 6923c6fd2807SJeff Garzik 6924c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_pio_need_iordy); 6925c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_timing_compute); 6926c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_timing_merge); 6927c6fd2807SJeff Garzik 6928c6fd2807SJeff Garzik #ifdef CONFIG_PCI 6929c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(pci_test_config_bits); 6930d583bc18STejun Heo EXPORT_SYMBOL_GPL(ata_pci_init_sff_host); 69311626aeb8STejun Heo EXPORT_SYMBOL_GPL(ata_pci_init_bmdma); 6932d583bc18STejun Heo EXPORT_SYMBOL_GPL(ata_pci_prepare_sff_host); 6933c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_pci_init_one); 6934c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_pci_remove_one); 69356ffa01d8STejun Heo #ifdef CONFIG_PM 6936c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_pci_device_do_suspend); 6937c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_pci_device_do_resume); 6938c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_pci_device_suspend); 6939c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_pci_device_resume); 69406ffa01d8STejun Heo #endif /* CONFIG_PM */ 6941c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_pci_default_filter); 6942c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_pci_clear_simplex); 6943c6fd2807SJeff Garzik #endif /* CONFIG_PCI */ 6944c6fd2807SJeff Garzik 6945c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_eng_timeout); 6946c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_port_schedule_eh); 6947c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_port_abort); 6948c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_port_freeze); 6949c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_eh_freeze_port); 6950c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_eh_thaw_port); 6951c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_eh_qc_complete); 6952c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_eh_qc_retry); 6953c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_do_eh); 695483625006SAkira Iguchi EXPORT_SYMBOL_GPL(ata_irq_on); 695583625006SAkira Iguchi EXPORT_SYMBOL_GPL(ata_dummy_irq_on); 695683625006SAkira Iguchi EXPORT_SYMBOL_GPL(ata_irq_ack); 695783625006SAkira Iguchi EXPORT_SYMBOL_GPL(ata_dummy_irq_ack); 6958a619f981SAkira Iguchi EXPORT_SYMBOL_GPL(ata_dev_try_classify); 6959be0d18dfSAlan Cox 6960be0d18dfSAlan Cox EXPORT_SYMBOL_GPL(ata_cable_40wire); 6961be0d18dfSAlan Cox EXPORT_SYMBOL_GPL(ata_cable_80wire); 6962be0d18dfSAlan Cox EXPORT_SYMBOL_GPL(ata_cable_unknown); 6963be0d18dfSAlan Cox EXPORT_SYMBOL_GPL(ata_cable_sata); 6964