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); 7475683fe7STejun Heo static unsigned long ata_dev_blacklisted(const struct ata_device *dev); 75c6fd2807SJeff Garzik 76f3187195STejun Heo unsigned int ata_print_id = 1; 77c6fd2807SJeff Garzik static struct workqueue_struct *ata_wq; 78c6fd2807SJeff Garzik 79c6fd2807SJeff Garzik struct workqueue_struct *ata_aux_wq; 80c6fd2807SJeff Garzik 81c6fd2807SJeff Garzik int atapi_enabled = 1; 82c6fd2807SJeff Garzik module_param(atapi_enabled, int, 0444); 83c6fd2807SJeff Garzik MODULE_PARM_DESC(atapi_enabled, "Enable discovery of ATAPI devices (0=off, 1=on)"); 84c6fd2807SJeff Garzik 85c6fd2807SJeff Garzik int atapi_dmadir = 0; 86c6fd2807SJeff Garzik module_param(atapi_dmadir, int, 0444); 87c6fd2807SJeff Garzik MODULE_PARM_DESC(atapi_dmadir, "Enable ATAPI DMADIR bridge support (0=off, 1=on)"); 88c6fd2807SJeff Garzik 89c6fd2807SJeff Garzik int libata_fua = 0; 90c6fd2807SJeff Garzik module_param_named(fua, libata_fua, int, 0444); 91c6fd2807SJeff Garzik MODULE_PARM_DESC(fua, "FUA support (0=off, 1=on)"); 92c6fd2807SJeff Garzik 931e999736SAlan Cox static int ata_ignore_hpa = 0; 941e999736SAlan Cox module_param_named(ignore_hpa, ata_ignore_hpa, int, 0644); 951e999736SAlan Cox MODULE_PARM_DESC(ignore_hpa, "Ignore HPA limit (0=keep BIOS limits, 1=ignore limits, using full disk)"); 961e999736SAlan Cox 97c6fd2807SJeff Garzik static int ata_probe_timeout = ATA_TMOUT_INTERNAL / HZ; 98c6fd2807SJeff Garzik module_param(ata_probe_timeout, int, 0444); 99c6fd2807SJeff Garzik MODULE_PARM_DESC(ata_probe_timeout, "Set ATA probing timeout (seconds)"); 100c6fd2807SJeff Garzik 101d7d0dad6SJeff Garzik int libata_noacpi = 1; 102d7d0dad6SJeff Garzik module_param_named(noacpi, libata_noacpi, int, 0444); 10311ef697bSKristen Carlson Accardi MODULE_PARM_DESC(noacpi, "Disables the use of ACPI in suspend/resume when set"); 10411ef697bSKristen Carlson Accardi 105c6fd2807SJeff Garzik MODULE_AUTHOR("Jeff Garzik"); 106c6fd2807SJeff Garzik MODULE_DESCRIPTION("Library module for ATA devices"); 107c6fd2807SJeff Garzik MODULE_LICENSE("GPL"); 108c6fd2807SJeff Garzik MODULE_VERSION(DRV_VERSION); 109c6fd2807SJeff Garzik 110c6fd2807SJeff Garzik 111c6fd2807SJeff Garzik /** 112c6fd2807SJeff Garzik * ata_tf_to_fis - Convert ATA taskfile to SATA FIS structure 113c6fd2807SJeff Garzik * @tf: Taskfile to convert 114c6fd2807SJeff Garzik * @pmp: Port multiplier port 1159977126cSTejun Heo * @is_cmd: This FIS is for command 1169977126cSTejun Heo * @fis: Buffer into which data will output 117c6fd2807SJeff Garzik * 118c6fd2807SJeff Garzik * Converts a standard ATA taskfile to a Serial ATA 119c6fd2807SJeff Garzik * FIS structure (Register - Host to Device). 120c6fd2807SJeff Garzik * 121c6fd2807SJeff Garzik * LOCKING: 122c6fd2807SJeff Garzik * Inherited from caller. 123c6fd2807SJeff Garzik */ 1249977126cSTejun Heo void ata_tf_to_fis(const struct ata_taskfile *tf, u8 pmp, int is_cmd, u8 *fis) 125c6fd2807SJeff Garzik { 126c6fd2807SJeff Garzik fis[0] = 0x27; /* Register - Host to Device FIS */ 1279977126cSTejun Heo fis[1] = pmp & 0xf; /* Port multiplier number*/ 1289977126cSTejun Heo if (is_cmd) 1299977126cSTejun Heo fis[1] |= (1 << 7); /* bit 7 indicates Command FIS */ 1309977126cSTejun Heo 131c6fd2807SJeff Garzik fis[2] = tf->command; 132c6fd2807SJeff Garzik fis[3] = tf->feature; 133c6fd2807SJeff Garzik 134c6fd2807SJeff Garzik fis[4] = tf->lbal; 135c6fd2807SJeff Garzik fis[5] = tf->lbam; 136c6fd2807SJeff Garzik fis[6] = tf->lbah; 137c6fd2807SJeff Garzik fis[7] = tf->device; 138c6fd2807SJeff Garzik 139c6fd2807SJeff Garzik fis[8] = tf->hob_lbal; 140c6fd2807SJeff Garzik fis[9] = tf->hob_lbam; 141c6fd2807SJeff Garzik fis[10] = tf->hob_lbah; 142c6fd2807SJeff Garzik fis[11] = tf->hob_feature; 143c6fd2807SJeff Garzik 144c6fd2807SJeff Garzik fis[12] = tf->nsect; 145c6fd2807SJeff Garzik fis[13] = tf->hob_nsect; 146c6fd2807SJeff Garzik fis[14] = 0; 147c6fd2807SJeff Garzik fis[15] = tf->ctl; 148c6fd2807SJeff Garzik 149c6fd2807SJeff Garzik fis[16] = 0; 150c6fd2807SJeff Garzik fis[17] = 0; 151c6fd2807SJeff Garzik fis[18] = 0; 152c6fd2807SJeff Garzik fis[19] = 0; 153c6fd2807SJeff Garzik } 154c6fd2807SJeff Garzik 155c6fd2807SJeff Garzik /** 156c6fd2807SJeff Garzik * ata_tf_from_fis - Convert SATA FIS to ATA taskfile 157c6fd2807SJeff Garzik * @fis: Buffer from which data will be input 158c6fd2807SJeff Garzik * @tf: Taskfile to output 159c6fd2807SJeff Garzik * 160c6fd2807SJeff Garzik * Converts a serial ATA FIS structure to a standard ATA taskfile. 161c6fd2807SJeff Garzik * 162c6fd2807SJeff Garzik * LOCKING: 163c6fd2807SJeff Garzik * Inherited from caller. 164c6fd2807SJeff Garzik */ 165c6fd2807SJeff Garzik 166c6fd2807SJeff Garzik void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf) 167c6fd2807SJeff Garzik { 168c6fd2807SJeff Garzik tf->command = fis[2]; /* status */ 169c6fd2807SJeff Garzik tf->feature = fis[3]; /* error */ 170c6fd2807SJeff Garzik 171c6fd2807SJeff Garzik tf->lbal = fis[4]; 172c6fd2807SJeff Garzik tf->lbam = fis[5]; 173c6fd2807SJeff Garzik tf->lbah = fis[6]; 174c6fd2807SJeff Garzik tf->device = fis[7]; 175c6fd2807SJeff Garzik 176c6fd2807SJeff Garzik tf->hob_lbal = fis[8]; 177c6fd2807SJeff Garzik tf->hob_lbam = fis[9]; 178c6fd2807SJeff Garzik tf->hob_lbah = fis[10]; 179c6fd2807SJeff Garzik 180c6fd2807SJeff Garzik tf->nsect = fis[12]; 181c6fd2807SJeff Garzik tf->hob_nsect = fis[13]; 182c6fd2807SJeff Garzik } 183c6fd2807SJeff Garzik 184c6fd2807SJeff Garzik static const u8 ata_rw_cmds[] = { 185c6fd2807SJeff Garzik /* pio multi */ 186c6fd2807SJeff Garzik ATA_CMD_READ_MULTI, 187c6fd2807SJeff Garzik ATA_CMD_WRITE_MULTI, 188c6fd2807SJeff Garzik ATA_CMD_READ_MULTI_EXT, 189c6fd2807SJeff Garzik ATA_CMD_WRITE_MULTI_EXT, 190c6fd2807SJeff Garzik 0, 191c6fd2807SJeff Garzik 0, 192c6fd2807SJeff Garzik 0, 193c6fd2807SJeff Garzik ATA_CMD_WRITE_MULTI_FUA_EXT, 194c6fd2807SJeff Garzik /* pio */ 195c6fd2807SJeff Garzik ATA_CMD_PIO_READ, 196c6fd2807SJeff Garzik ATA_CMD_PIO_WRITE, 197c6fd2807SJeff Garzik ATA_CMD_PIO_READ_EXT, 198c6fd2807SJeff Garzik ATA_CMD_PIO_WRITE_EXT, 199c6fd2807SJeff Garzik 0, 200c6fd2807SJeff Garzik 0, 201c6fd2807SJeff Garzik 0, 202c6fd2807SJeff Garzik 0, 203c6fd2807SJeff Garzik /* dma */ 204c6fd2807SJeff Garzik ATA_CMD_READ, 205c6fd2807SJeff Garzik ATA_CMD_WRITE, 206c6fd2807SJeff Garzik ATA_CMD_READ_EXT, 207c6fd2807SJeff Garzik ATA_CMD_WRITE_EXT, 208c6fd2807SJeff Garzik 0, 209c6fd2807SJeff Garzik 0, 210c6fd2807SJeff Garzik 0, 211c6fd2807SJeff Garzik ATA_CMD_WRITE_FUA_EXT 212c6fd2807SJeff Garzik }; 213c6fd2807SJeff Garzik 214c6fd2807SJeff Garzik /** 215c6fd2807SJeff Garzik * ata_rwcmd_protocol - set taskfile r/w commands and protocol 216bd056d7eSTejun Heo * @tf: command to examine and configure 217bd056d7eSTejun Heo * @dev: device tf belongs to 218c6fd2807SJeff Garzik * 219c6fd2807SJeff Garzik * Examine the device configuration and tf->flags to calculate 220c6fd2807SJeff Garzik * the proper read/write commands and protocol to use. 221c6fd2807SJeff Garzik * 222c6fd2807SJeff Garzik * LOCKING: 223c6fd2807SJeff Garzik * caller. 224c6fd2807SJeff Garzik */ 225bd056d7eSTejun Heo static int ata_rwcmd_protocol(struct ata_taskfile *tf, struct ata_device *dev) 226c6fd2807SJeff Garzik { 227c6fd2807SJeff Garzik u8 cmd; 228c6fd2807SJeff Garzik 229c6fd2807SJeff Garzik int index, fua, lba48, write; 230c6fd2807SJeff Garzik 231c6fd2807SJeff Garzik fua = (tf->flags & ATA_TFLAG_FUA) ? 4 : 0; 232c6fd2807SJeff Garzik lba48 = (tf->flags & ATA_TFLAG_LBA48) ? 2 : 0; 233c6fd2807SJeff Garzik write = (tf->flags & ATA_TFLAG_WRITE) ? 1 : 0; 234c6fd2807SJeff Garzik 235c6fd2807SJeff Garzik if (dev->flags & ATA_DFLAG_PIO) { 236c6fd2807SJeff Garzik tf->protocol = ATA_PROT_PIO; 237c6fd2807SJeff Garzik index = dev->multi_count ? 0 : 8; 238bd056d7eSTejun Heo } else if (lba48 && (dev->ap->flags & ATA_FLAG_PIO_LBA48)) { 239c6fd2807SJeff Garzik /* Unable to use DMA due to host limitation */ 240c6fd2807SJeff Garzik tf->protocol = ATA_PROT_PIO; 241c6fd2807SJeff Garzik index = dev->multi_count ? 0 : 8; 242c6fd2807SJeff Garzik } else { 243c6fd2807SJeff Garzik tf->protocol = ATA_PROT_DMA; 244c6fd2807SJeff Garzik index = 16; 245c6fd2807SJeff Garzik } 246c6fd2807SJeff Garzik 247c6fd2807SJeff Garzik cmd = ata_rw_cmds[index + fua + lba48 + write]; 248c6fd2807SJeff Garzik if (cmd) { 249c6fd2807SJeff Garzik tf->command = cmd; 250c6fd2807SJeff Garzik return 0; 251c6fd2807SJeff Garzik } 252c6fd2807SJeff Garzik return -1; 253c6fd2807SJeff Garzik } 254c6fd2807SJeff Garzik 255c6fd2807SJeff Garzik /** 25635b649feSTejun Heo * ata_tf_read_block - Read block address from ATA taskfile 25735b649feSTejun Heo * @tf: ATA taskfile of interest 25835b649feSTejun Heo * @dev: ATA device @tf belongs to 25935b649feSTejun Heo * 26035b649feSTejun Heo * LOCKING: 26135b649feSTejun Heo * None. 26235b649feSTejun Heo * 26335b649feSTejun Heo * Read block address from @tf. This function can handle all 26435b649feSTejun Heo * three address formats - LBA, LBA48 and CHS. tf->protocol and 26535b649feSTejun Heo * flags select the address format to use. 26635b649feSTejun Heo * 26735b649feSTejun Heo * RETURNS: 26835b649feSTejun Heo * Block address read from @tf. 26935b649feSTejun Heo */ 27035b649feSTejun Heo u64 ata_tf_read_block(struct ata_taskfile *tf, struct ata_device *dev) 27135b649feSTejun Heo { 27235b649feSTejun Heo u64 block = 0; 27335b649feSTejun Heo 27435b649feSTejun Heo if (tf->flags & ATA_TFLAG_LBA) { 27535b649feSTejun Heo if (tf->flags & ATA_TFLAG_LBA48) { 27635b649feSTejun Heo block |= (u64)tf->hob_lbah << 40; 27735b649feSTejun Heo block |= (u64)tf->hob_lbam << 32; 27835b649feSTejun Heo block |= tf->hob_lbal << 24; 27935b649feSTejun Heo } else 28035b649feSTejun Heo block |= (tf->device & 0xf) << 24; 28135b649feSTejun Heo 28235b649feSTejun Heo block |= tf->lbah << 16; 28335b649feSTejun Heo block |= tf->lbam << 8; 28435b649feSTejun Heo block |= tf->lbal; 28535b649feSTejun Heo } else { 28635b649feSTejun Heo u32 cyl, head, sect; 28735b649feSTejun Heo 28835b649feSTejun Heo cyl = tf->lbam | (tf->lbah << 8); 28935b649feSTejun Heo head = tf->device & 0xf; 29035b649feSTejun Heo sect = tf->lbal; 29135b649feSTejun Heo 29235b649feSTejun Heo block = (cyl * dev->heads + head) * dev->sectors + sect; 29335b649feSTejun Heo } 29435b649feSTejun Heo 29535b649feSTejun Heo return block; 29635b649feSTejun Heo } 29735b649feSTejun Heo 29835b649feSTejun Heo /** 299bd056d7eSTejun Heo * ata_build_rw_tf - Build ATA taskfile for given read/write request 300bd056d7eSTejun Heo * @tf: Target ATA taskfile 301bd056d7eSTejun Heo * @dev: ATA device @tf belongs to 302bd056d7eSTejun Heo * @block: Block address 303bd056d7eSTejun Heo * @n_block: Number of blocks 304bd056d7eSTejun Heo * @tf_flags: RW/FUA etc... 305bd056d7eSTejun Heo * @tag: tag 306bd056d7eSTejun Heo * 307bd056d7eSTejun Heo * LOCKING: 308bd056d7eSTejun Heo * None. 309bd056d7eSTejun Heo * 310bd056d7eSTejun Heo * Build ATA taskfile @tf for read/write request described by 311bd056d7eSTejun Heo * @block, @n_block, @tf_flags and @tag on @dev. 312bd056d7eSTejun Heo * 313bd056d7eSTejun Heo * RETURNS: 314bd056d7eSTejun Heo * 315bd056d7eSTejun Heo * 0 on success, -ERANGE if the request is too large for @dev, 316bd056d7eSTejun Heo * -EINVAL if the request is invalid. 317bd056d7eSTejun Heo */ 318bd056d7eSTejun Heo int ata_build_rw_tf(struct ata_taskfile *tf, struct ata_device *dev, 319bd056d7eSTejun Heo u64 block, u32 n_block, unsigned int tf_flags, 320bd056d7eSTejun Heo unsigned int tag) 321bd056d7eSTejun Heo { 322bd056d7eSTejun Heo tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 323bd056d7eSTejun Heo tf->flags |= tf_flags; 324bd056d7eSTejun Heo 3256d1245bfSTejun Heo if (ata_ncq_enabled(dev) && likely(tag != ATA_TAG_INTERNAL)) { 326bd056d7eSTejun Heo /* yay, NCQ */ 327bd056d7eSTejun Heo if (!lba_48_ok(block, n_block)) 328bd056d7eSTejun Heo return -ERANGE; 329bd056d7eSTejun Heo 330bd056d7eSTejun Heo tf->protocol = ATA_PROT_NCQ; 331bd056d7eSTejun Heo tf->flags |= ATA_TFLAG_LBA | ATA_TFLAG_LBA48; 332bd056d7eSTejun Heo 333bd056d7eSTejun Heo if (tf->flags & ATA_TFLAG_WRITE) 334bd056d7eSTejun Heo tf->command = ATA_CMD_FPDMA_WRITE; 335bd056d7eSTejun Heo else 336bd056d7eSTejun Heo tf->command = ATA_CMD_FPDMA_READ; 337bd056d7eSTejun Heo 338bd056d7eSTejun Heo tf->nsect = tag << 3; 339bd056d7eSTejun Heo tf->hob_feature = (n_block >> 8) & 0xff; 340bd056d7eSTejun Heo tf->feature = n_block & 0xff; 341bd056d7eSTejun Heo 342bd056d7eSTejun Heo tf->hob_lbah = (block >> 40) & 0xff; 343bd056d7eSTejun Heo tf->hob_lbam = (block >> 32) & 0xff; 344bd056d7eSTejun Heo tf->hob_lbal = (block >> 24) & 0xff; 345bd056d7eSTejun Heo tf->lbah = (block >> 16) & 0xff; 346bd056d7eSTejun Heo tf->lbam = (block >> 8) & 0xff; 347bd056d7eSTejun Heo tf->lbal = block & 0xff; 348bd056d7eSTejun Heo 349bd056d7eSTejun Heo tf->device = 1 << 6; 350bd056d7eSTejun Heo if (tf->flags & ATA_TFLAG_FUA) 351bd056d7eSTejun Heo tf->device |= 1 << 7; 352bd056d7eSTejun Heo } else if (dev->flags & ATA_DFLAG_LBA) { 353bd056d7eSTejun Heo tf->flags |= ATA_TFLAG_LBA; 354bd056d7eSTejun Heo 355bd056d7eSTejun Heo if (lba_28_ok(block, n_block)) { 356bd056d7eSTejun Heo /* use LBA28 */ 357bd056d7eSTejun Heo tf->device |= (block >> 24) & 0xf; 358bd056d7eSTejun Heo } else if (lba_48_ok(block, n_block)) { 359bd056d7eSTejun Heo if (!(dev->flags & ATA_DFLAG_LBA48)) 360bd056d7eSTejun Heo return -ERANGE; 361bd056d7eSTejun Heo 362bd056d7eSTejun Heo /* use LBA48 */ 363bd056d7eSTejun Heo tf->flags |= ATA_TFLAG_LBA48; 364bd056d7eSTejun Heo 365bd056d7eSTejun Heo tf->hob_nsect = (n_block >> 8) & 0xff; 366bd056d7eSTejun Heo 367bd056d7eSTejun Heo tf->hob_lbah = (block >> 40) & 0xff; 368bd056d7eSTejun Heo tf->hob_lbam = (block >> 32) & 0xff; 369bd056d7eSTejun Heo tf->hob_lbal = (block >> 24) & 0xff; 370bd056d7eSTejun Heo } else 371bd056d7eSTejun Heo /* request too large even for LBA48 */ 372bd056d7eSTejun Heo return -ERANGE; 373bd056d7eSTejun Heo 374bd056d7eSTejun Heo if (unlikely(ata_rwcmd_protocol(tf, dev) < 0)) 375bd056d7eSTejun Heo return -EINVAL; 376bd056d7eSTejun Heo 377bd056d7eSTejun Heo tf->nsect = n_block & 0xff; 378bd056d7eSTejun Heo 379bd056d7eSTejun Heo tf->lbah = (block >> 16) & 0xff; 380bd056d7eSTejun Heo tf->lbam = (block >> 8) & 0xff; 381bd056d7eSTejun Heo tf->lbal = block & 0xff; 382bd056d7eSTejun Heo 383bd056d7eSTejun Heo tf->device |= ATA_LBA; 384bd056d7eSTejun Heo } else { 385bd056d7eSTejun Heo /* CHS */ 386bd056d7eSTejun Heo u32 sect, head, cyl, track; 387bd056d7eSTejun Heo 388bd056d7eSTejun Heo /* The request -may- be too large for CHS addressing. */ 389bd056d7eSTejun Heo if (!lba_28_ok(block, n_block)) 390bd056d7eSTejun Heo return -ERANGE; 391bd056d7eSTejun Heo 392bd056d7eSTejun Heo if (unlikely(ata_rwcmd_protocol(tf, dev) < 0)) 393bd056d7eSTejun Heo return -EINVAL; 394bd056d7eSTejun Heo 395bd056d7eSTejun Heo /* Convert LBA to CHS */ 396bd056d7eSTejun Heo track = (u32)block / dev->sectors; 397bd056d7eSTejun Heo cyl = track / dev->heads; 398bd056d7eSTejun Heo head = track % dev->heads; 399bd056d7eSTejun Heo sect = (u32)block % dev->sectors + 1; 400bd056d7eSTejun Heo 401bd056d7eSTejun Heo DPRINTK("block %u track %u cyl %u head %u sect %u\n", 402bd056d7eSTejun Heo (u32)block, track, cyl, head, sect); 403bd056d7eSTejun Heo 404bd056d7eSTejun Heo /* Check whether the converted CHS can fit. 405bd056d7eSTejun Heo Cylinder: 0-65535 406bd056d7eSTejun Heo Head: 0-15 407bd056d7eSTejun Heo Sector: 1-255*/ 408bd056d7eSTejun Heo if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect)) 409bd056d7eSTejun Heo return -ERANGE; 410bd056d7eSTejun Heo 411bd056d7eSTejun Heo tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */ 412bd056d7eSTejun Heo tf->lbal = sect; 413bd056d7eSTejun Heo tf->lbam = cyl; 414bd056d7eSTejun Heo tf->lbah = cyl >> 8; 415bd056d7eSTejun Heo tf->device |= head; 416bd056d7eSTejun Heo } 417bd056d7eSTejun Heo 418bd056d7eSTejun Heo return 0; 419bd056d7eSTejun Heo } 420bd056d7eSTejun Heo 421bd056d7eSTejun Heo /** 422c6fd2807SJeff Garzik * ata_pack_xfermask - Pack pio, mwdma and udma masks into xfer_mask 423c6fd2807SJeff Garzik * @pio_mask: pio_mask 424c6fd2807SJeff Garzik * @mwdma_mask: mwdma_mask 425c6fd2807SJeff Garzik * @udma_mask: udma_mask 426c6fd2807SJeff Garzik * 427c6fd2807SJeff Garzik * Pack @pio_mask, @mwdma_mask and @udma_mask into a single 428c6fd2807SJeff Garzik * unsigned int xfer_mask. 429c6fd2807SJeff Garzik * 430c6fd2807SJeff Garzik * LOCKING: 431c6fd2807SJeff Garzik * None. 432c6fd2807SJeff Garzik * 433c6fd2807SJeff Garzik * RETURNS: 434c6fd2807SJeff Garzik * Packed xfer_mask. 435c6fd2807SJeff Garzik */ 436c6fd2807SJeff Garzik static unsigned int ata_pack_xfermask(unsigned int pio_mask, 437c6fd2807SJeff Garzik unsigned int mwdma_mask, 438c6fd2807SJeff Garzik unsigned int udma_mask) 439c6fd2807SJeff Garzik { 440c6fd2807SJeff Garzik return ((pio_mask << ATA_SHIFT_PIO) & ATA_MASK_PIO) | 441c6fd2807SJeff Garzik ((mwdma_mask << ATA_SHIFT_MWDMA) & ATA_MASK_MWDMA) | 442c6fd2807SJeff Garzik ((udma_mask << ATA_SHIFT_UDMA) & ATA_MASK_UDMA); 443c6fd2807SJeff Garzik } 444c6fd2807SJeff Garzik 445c6fd2807SJeff Garzik /** 446c6fd2807SJeff Garzik * ata_unpack_xfermask - Unpack xfer_mask into pio, mwdma and udma masks 447c6fd2807SJeff Garzik * @xfer_mask: xfer_mask to unpack 448c6fd2807SJeff Garzik * @pio_mask: resulting pio_mask 449c6fd2807SJeff Garzik * @mwdma_mask: resulting mwdma_mask 450c6fd2807SJeff Garzik * @udma_mask: resulting udma_mask 451c6fd2807SJeff Garzik * 452c6fd2807SJeff Garzik * Unpack @xfer_mask into @pio_mask, @mwdma_mask and @udma_mask. 453c6fd2807SJeff Garzik * Any NULL distination masks will be ignored. 454c6fd2807SJeff Garzik */ 455c6fd2807SJeff Garzik static void ata_unpack_xfermask(unsigned int xfer_mask, 456c6fd2807SJeff Garzik unsigned int *pio_mask, 457c6fd2807SJeff Garzik unsigned int *mwdma_mask, 458c6fd2807SJeff Garzik unsigned int *udma_mask) 459c6fd2807SJeff Garzik { 460c6fd2807SJeff Garzik if (pio_mask) 461c6fd2807SJeff Garzik *pio_mask = (xfer_mask & ATA_MASK_PIO) >> ATA_SHIFT_PIO; 462c6fd2807SJeff Garzik if (mwdma_mask) 463c6fd2807SJeff Garzik *mwdma_mask = (xfer_mask & ATA_MASK_MWDMA) >> ATA_SHIFT_MWDMA; 464c6fd2807SJeff Garzik if (udma_mask) 465c6fd2807SJeff Garzik *udma_mask = (xfer_mask & ATA_MASK_UDMA) >> ATA_SHIFT_UDMA; 466c6fd2807SJeff Garzik } 467c6fd2807SJeff Garzik 468c6fd2807SJeff Garzik static const struct ata_xfer_ent { 469c6fd2807SJeff Garzik int shift, bits; 470c6fd2807SJeff Garzik u8 base; 471c6fd2807SJeff Garzik } ata_xfer_tbl[] = { 472c6fd2807SJeff Garzik { ATA_SHIFT_PIO, ATA_BITS_PIO, XFER_PIO_0 }, 473c6fd2807SJeff Garzik { ATA_SHIFT_MWDMA, ATA_BITS_MWDMA, XFER_MW_DMA_0 }, 474c6fd2807SJeff Garzik { ATA_SHIFT_UDMA, ATA_BITS_UDMA, XFER_UDMA_0 }, 475c6fd2807SJeff Garzik { -1, }, 476c6fd2807SJeff Garzik }; 477c6fd2807SJeff Garzik 478c6fd2807SJeff Garzik /** 479c6fd2807SJeff Garzik * ata_xfer_mask2mode - Find matching XFER_* for the given xfer_mask 480c6fd2807SJeff Garzik * @xfer_mask: xfer_mask of interest 481c6fd2807SJeff Garzik * 482c6fd2807SJeff Garzik * Return matching XFER_* value for @xfer_mask. Only the highest 483c6fd2807SJeff Garzik * bit of @xfer_mask is considered. 484c6fd2807SJeff Garzik * 485c6fd2807SJeff Garzik * LOCKING: 486c6fd2807SJeff Garzik * None. 487c6fd2807SJeff Garzik * 488c6fd2807SJeff Garzik * RETURNS: 489c6fd2807SJeff Garzik * Matching XFER_* value, 0 if no match found. 490c6fd2807SJeff Garzik */ 491c6fd2807SJeff Garzik static u8 ata_xfer_mask2mode(unsigned int xfer_mask) 492c6fd2807SJeff Garzik { 493c6fd2807SJeff Garzik int highbit = fls(xfer_mask) - 1; 494c6fd2807SJeff Garzik const struct ata_xfer_ent *ent; 495c6fd2807SJeff Garzik 496c6fd2807SJeff Garzik for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) 497c6fd2807SJeff Garzik if (highbit >= ent->shift && highbit < ent->shift + ent->bits) 498c6fd2807SJeff Garzik return ent->base + highbit - ent->shift; 499c6fd2807SJeff Garzik return 0; 500c6fd2807SJeff Garzik } 501c6fd2807SJeff Garzik 502c6fd2807SJeff Garzik /** 503c6fd2807SJeff Garzik * ata_xfer_mode2mask - Find matching xfer_mask for XFER_* 504c6fd2807SJeff Garzik * @xfer_mode: XFER_* of interest 505c6fd2807SJeff Garzik * 506c6fd2807SJeff Garzik * Return matching xfer_mask for @xfer_mode. 507c6fd2807SJeff Garzik * 508c6fd2807SJeff Garzik * LOCKING: 509c6fd2807SJeff Garzik * None. 510c6fd2807SJeff Garzik * 511c6fd2807SJeff Garzik * RETURNS: 512c6fd2807SJeff Garzik * Matching xfer_mask, 0 if no match found. 513c6fd2807SJeff Garzik */ 514c6fd2807SJeff Garzik static unsigned int ata_xfer_mode2mask(u8 xfer_mode) 515c6fd2807SJeff Garzik { 516c6fd2807SJeff Garzik const struct ata_xfer_ent *ent; 517c6fd2807SJeff Garzik 518c6fd2807SJeff Garzik for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) 519c6fd2807SJeff Garzik if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits) 520c6fd2807SJeff Garzik return 1 << (ent->shift + xfer_mode - ent->base); 521c6fd2807SJeff Garzik return 0; 522c6fd2807SJeff Garzik } 523c6fd2807SJeff Garzik 524c6fd2807SJeff Garzik /** 525c6fd2807SJeff Garzik * ata_xfer_mode2shift - Find matching xfer_shift for XFER_* 526c6fd2807SJeff Garzik * @xfer_mode: XFER_* of interest 527c6fd2807SJeff Garzik * 528c6fd2807SJeff Garzik * Return matching xfer_shift for @xfer_mode. 529c6fd2807SJeff Garzik * 530c6fd2807SJeff Garzik * LOCKING: 531c6fd2807SJeff Garzik * None. 532c6fd2807SJeff Garzik * 533c6fd2807SJeff Garzik * RETURNS: 534c6fd2807SJeff Garzik * Matching xfer_shift, -1 if no match found. 535c6fd2807SJeff Garzik */ 536c6fd2807SJeff Garzik static int ata_xfer_mode2shift(unsigned int xfer_mode) 537c6fd2807SJeff Garzik { 538c6fd2807SJeff Garzik const struct ata_xfer_ent *ent; 539c6fd2807SJeff Garzik 540c6fd2807SJeff Garzik for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) 541c6fd2807SJeff Garzik if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits) 542c6fd2807SJeff Garzik return ent->shift; 543c6fd2807SJeff Garzik return -1; 544c6fd2807SJeff Garzik } 545c6fd2807SJeff Garzik 546c6fd2807SJeff Garzik /** 547c6fd2807SJeff Garzik * ata_mode_string - convert xfer_mask to string 548c6fd2807SJeff Garzik * @xfer_mask: mask of bits supported; only highest bit counts. 549c6fd2807SJeff Garzik * 550c6fd2807SJeff Garzik * Determine string which represents the highest speed 551c6fd2807SJeff Garzik * (highest bit in @modemask). 552c6fd2807SJeff Garzik * 553c6fd2807SJeff Garzik * LOCKING: 554c6fd2807SJeff Garzik * None. 555c6fd2807SJeff Garzik * 556c6fd2807SJeff Garzik * RETURNS: 557c6fd2807SJeff Garzik * Constant C string representing highest speed listed in 558c6fd2807SJeff Garzik * @mode_mask, or the constant C string "<n/a>". 559c6fd2807SJeff Garzik */ 560c6fd2807SJeff Garzik static const char *ata_mode_string(unsigned int xfer_mask) 561c6fd2807SJeff Garzik { 562c6fd2807SJeff Garzik static const char * const xfer_mode_str[] = { 563c6fd2807SJeff Garzik "PIO0", 564c6fd2807SJeff Garzik "PIO1", 565c6fd2807SJeff Garzik "PIO2", 566c6fd2807SJeff Garzik "PIO3", 567c6fd2807SJeff Garzik "PIO4", 568b352e57dSAlan Cox "PIO5", 569b352e57dSAlan Cox "PIO6", 570c6fd2807SJeff Garzik "MWDMA0", 571c6fd2807SJeff Garzik "MWDMA1", 572c6fd2807SJeff Garzik "MWDMA2", 573b352e57dSAlan Cox "MWDMA3", 574b352e57dSAlan Cox "MWDMA4", 575c6fd2807SJeff Garzik "UDMA/16", 576c6fd2807SJeff Garzik "UDMA/25", 577c6fd2807SJeff Garzik "UDMA/33", 578c6fd2807SJeff Garzik "UDMA/44", 579c6fd2807SJeff Garzik "UDMA/66", 580c6fd2807SJeff Garzik "UDMA/100", 581c6fd2807SJeff Garzik "UDMA/133", 582c6fd2807SJeff Garzik "UDMA7", 583c6fd2807SJeff Garzik }; 584c6fd2807SJeff Garzik int highbit; 585c6fd2807SJeff Garzik 586c6fd2807SJeff Garzik highbit = fls(xfer_mask) - 1; 587c6fd2807SJeff Garzik if (highbit >= 0 && highbit < ARRAY_SIZE(xfer_mode_str)) 588c6fd2807SJeff Garzik return xfer_mode_str[highbit]; 589c6fd2807SJeff Garzik return "<n/a>"; 590c6fd2807SJeff Garzik } 591c6fd2807SJeff Garzik 592c6fd2807SJeff Garzik static const char *sata_spd_string(unsigned int spd) 593c6fd2807SJeff Garzik { 594c6fd2807SJeff Garzik static const char * const spd_str[] = { 595c6fd2807SJeff Garzik "1.5 Gbps", 596c6fd2807SJeff Garzik "3.0 Gbps", 597c6fd2807SJeff Garzik }; 598c6fd2807SJeff Garzik 599c6fd2807SJeff Garzik if (spd == 0 || (spd - 1) >= ARRAY_SIZE(spd_str)) 600c6fd2807SJeff Garzik return "<unknown>"; 601c6fd2807SJeff Garzik return spd_str[spd - 1]; 602c6fd2807SJeff Garzik } 603c6fd2807SJeff Garzik 604c6fd2807SJeff Garzik void ata_dev_disable(struct ata_device *dev) 605c6fd2807SJeff Garzik { 60609d7f9b0STejun Heo if (ata_dev_enabled(dev)) { 60709d7f9b0STejun Heo if (ata_msg_drv(dev->ap)) 608c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_WARNING, "disabled\n"); 6094ae72a1eSTejun Heo ata_down_xfermask_limit(dev, ATA_DNXFER_FORCE_PIO0 | 6104ae72a1eSTejun Heo ATA_DNXFER_QUIET); 611c6fd2807SJeff Garzik dev->class++; 612c6fd2807SJeff Garzik } 613c6fd2807SJeff Garzik } 614c6fd2807SJeff Garzik 615c6fd2807SJeff Garzik /** 616c6fd2807SJeff Garzik * ata_devchk - PATA device presence detection 617c6fd2807SJeff Garzik * @ap: ATA channel to examine 618c6fd2807SJeff Garzik * @device: Device to examine (starting at zero) 619c6fd2807SJeff Garzik * 6200d5ff566STejun Heo * This technique was originally described in 6210d5ff566STejun Heo * Hale Landis's ATADRVR (www.ata-atapi.com), and 6220d5ff566STejun Heo * later found its way into the ATA/ATAPI spec. 6230d5ff566STejun Heo * 6240d5ff566STejun Heo * Write a pattern to the ATA shadow registers, 6250d5ff566STejun Heo * and if a device is present, it will respond by 6260d5ff566STejun Heo * correctly storing and echoing back the 6270d5ff566STejun Heo * ATA shadow register contents. 628c6fd2807SJeff Garzik * 629c6fd2807SJeff Garzik * LOCKING: 630c6fd2807SJeff Garzik * caller. 631c6fd2807SJeff Garzik */ 632c6fd2807SJeff Garzik 6330d5ff566STejun Heo static unsigned int ata_devchk(struct ata_port *ap, unsigned int device) 634c6fd2807SJeff Garzik { 6350d5ff566STejun Heo struct ata_ioports *ioaddr = &ap->ioaddr; 6360d5ff566STejun Heo u8 nsect, lbal; 6370d5ff566STejun Heo 6380d5ff566STejun Heo ap->ops->dev_select(ap, device); 6390d5ff566STejun Heo 6400d5ff566STejun Heo iowrite8(0x55, ioaddr->nsect_addr); 6410d5ff566STejun Heo iowrite8(0xaa, ioaddr->lbal_addr); 6420d5ff566STejun Heo 6430d5ff566STejun Heo iowrite8(0xaa, ioaddr->nsect_addr); 6440d5ff566STejun Heo iowrite8(0x55, ioaddr->lbal_addr); 6450d5ff566STejun Heo 6460d5ff566STejun Heo iowrite8(0x55, ioaddr->nsect_addr); 6470d5ff566STejun Heo iowrite8(0xaa, ioaddr->lbal_addr); 6480d5ff566STejun Heo 6490d5ff566STejun Heo nsect = ioread8(ioaddr->nsect_addr); 6500d5ff566STejun Heo lbal = ioread8(ioaddr->lbal_addr); 6510d5ff566STejun Heo 6520d5ff566STejun Heo if ((nsect == 0x55) && (lbal == 0xaa)) 6530d5ff566STejun Heo return 1; /* we found a device */ 6540d5ff566STejun Heo 6550d5ff566STejun Heo return 0; /* nothing found */ 656c6fd2807SJeff Garzik } 657c6fd2807SJeff Garzik 658c6fd2807SJeff Garzik /** 659c6fd2807SJeff Garzik * ata_dev_classify - determine device type based on ATA-spec signature 660c6fd2807SJeff Garzik * @tf: ATA taskfile register set for device to be identified 661c6fd2807SJeff Garzik * 662c6fd2807SJeff Garzik * Determine from taskfile register contents whether a device is 663c6fd2807SJeff Garzik * ATA or ATAPI, as per "Signature and persistence" section 664c6fd2807SJeff Garzik * of ATA/PI spec (volume 1, sect 5.14). 665c6fd2807SJeff Garzik * 666c6fd2807SJeff Garzik * LOCKING: 667c6fd2807SJeff Garzik * None. 668c6fd2807SJeff Garzik * 669c6fd2807SJeff Garzik * RETURNS: 670c6fd2807SJeff Garzik * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, or %ATA_DEV_UNKNOWN 671c6fd2807SJeff Garzik * the event of failure. 672c6fd2807SJeff Garzik */ 673c6fd2807SJeff Garzik 674c6fd2807SJeff Garzik unsigned int ata_dev_classify(const struct ata_taskfile *tf) 675c6fd2807SJeff Garzik { 676c6fd2807SJeff Garzik /* Apple's open source Darwin code hints that some devices only 677c6fd2807SJeff Garzik * put a proper signature into the LBA mid/high registers, 678c6fd2807SJeff Garzik * So, we only check those. It's sufficient for uniqueness. 679c6fd2807SJeff Garzik */ 680c6fd2807SJeff Garzik 681c6fd2807SJeff Garzik if (((tf->lbam == 0) && (tf->lbah == 0)) || 682c6fd2807SJeff Garzik ((tf->lbam == 0x3c) && (tf->lbah == 0xc3))) { 683c6fd2807SJeff Garzik DPRINTK("found ATA device by sig\n"); 684c6fd2807SJeff Garzik return ATA_DEV_ATA; 685c6fd2807SJeff Garzik } 686c6fd2807SJeff Garzik 687c6fd2807SJeff Garzik if (((tf->lbam == 0x14) && (tf->lbah == 0xeb)) || 688c6fd2807SJeff Garzik ((tf->lbam == 0x69) && (tf->lbah == 0x96))) { 689c6fd2807SJeff Garzik DPRINTK("found ATAPI device by sig\n"); 690c6fd2807SJeff Garzik return ATA_DEV_ATAPI; 691c6fd2807SJeff Garzik } 692c6fd2807SJeff Garzik 693c6fd2807SJeff Garzik DPRINTK("unknown device\n"); 694c6fd2807SJeff Garzik return ATA_DEV_UNKNOWN; 695c6fd2807SJeff Garzik } 696c6fd2807SJeff Garzik 697c6fd2807SJeff Garzik /** 698c6fd2807SJeff Garzik * ata_dev_try_classify - Parse returned ATA device signature 699c6fd2807SJeff Garzik * @ap: ATA channel to examine 700c6fd2807SJeff Garzik * @device: Device to examine (starting at zero) 701c6fd2807SJeff Garzik * @r_err: Value of error register on completion 702c6fd2807SJeff Garzik * 703c6fd2807SJeff Garzik * After an event -- SRST, E.D.D., or SATA COMRESET -- occurs, 704c6fd2807SJeff Garzik * an ATA/ATAPI-defined set of values is placed in the ATA 705c6fd2807SJeff Garzik * shadow registers, indicating the results of device detection 706c6fd2807SJeff Garzik * and diagnostics. 707c6fd2807SJeff Garzik * 708c6fd2807SJeff Garzik * Select the ATA device, and read the values from the ATA shadow 709c6fd2807SJeff Garzik * registers. Then parse according to the Error register value, 710c6fd2807SJeff Garzik * and the spec-defined values examined by ata_dev_classify(). 711c6fd2807SJeff Garzik * 712c6fd2807SJeff Garzik * LOCKING: 713c6fd2807SJeff Garzik * caller. 714c6fd2807SJeff Garzik * 715c6fd2807SJeff Garzik * RETURNS: 716c6fd2807SJeff Garzik * Device type - %ATA_DEV_ATA, %ATA_DEV_ATAPI or %ATA_DEV_NONE. 717c6fd2807SJeff Garzik */ 718c6fd2807SJeff Garzik 719a619f981SAkira Iguchi unsigned int 720c6fd2807SJeff Garzik ata_dev_try_classify(struct ata_port *ap, unsigned int device, u8 *r_err) 721c6fd2807SJeff Garzik { 722c6fd2807SJeff Garzik struct ata_taskfile tf; 723c6fd2807SJeff Garzik unsigned int class; 724c6fd2807SJeff Garzik u8 err; 725c6fd2807SJeff Garzik 726c6fd2807SJeff Garzik ap->ops->dev_select(ap, device); 727c6fd2807SJeff Garzik 728c6fd2807SJeff Garzik memset(&tf, 0, sizeof(tf)); 729c6fd2807SJeff Garzik 730c6fd2807SJeff Garzik ap->ops->tf_read(ap, &tf); 731c6fd2807SJeff Garzik err = tf.feature; 732c6fd2807SJeff Garzik if (r_err) 733c6fd2807SJeff Garzik *r_err = err; 734c6fd2807SJeff Garzik 73593590859SAlan Cox /* see if device passed diags: if master then continue and warn later */ 73693590859SAlan Cox if (err == 0 && device == 0) 73793590859SAlan Cox /* diagnostic fail : do nothing _YET_ */ 73893590859SAlan Cox ap->device[device].horkage |= ATA_HORKAGE_DIAGNOSTIC; 73993590859SAlan Cox else if (err == 1) 740c6fd2807SJeff Garzik /* do nothing */ ; 741c6fd2807SJeff Garzik else if ((device == 0) && (err == 0x81)) 742c6fd2807SJeff Garzik /* do nothing */ ; 743c6fd2807SJeff Garzik else 744c6fd2807SJeff Garzik return ATA_DEV_NONE; 745c6fd2807SJeff Garzik 746c6fd2807SJeff Garzik /* determine if device is ATA or ATAPI */ 747c6fd2807SJeff Garzik class = ata_dev_classify(&tf); 748c6fd2807SJeff Garzik 749c6fd2807SJeff Garzik if (class == ATA_DEV_UNKNOWN) 750c6fd2807SJeff Garzik return ATA_DEV_NONE; 751c6fd2807SJeff Garzik if ((class == ATA_DEV_ATA) && (ata_chk_status(ap) == 0)) 752c6fd2807SJeff Garzik return ATA_DEV_NONE; 753c6fd2807SJeff Garzik return class; 754c6fd2807SJeff Garzik } 755c6fd2807SJeff Garzik 756c6fd2807SJeff Garzik /** 757c6fd2807SJeff Garzik * ata_id_string - Convert IDENTIFY DEVICE page into string 758c6fd2807SJeff Garzik * @id: IDENTIFY DEVICE results we will examine 759c6fd2807SJeff Garzik * @s: string into which data is output 760c6fd2807SJeff Garzik * @ofs: offset into identify device page 761c6fd2807SJeff Garzik * @len: length of string to return. must be an even number. 762c6fd2807SJeff Garzik * 763c6fd2807SJeff Garzik * The strings in the IDENTIFY DEVICE page are broken up into 764c6fd2807SJeff Garzik * 16-bit chunks. Run through the string, and output each 765c6fd2807SJeff Garzik * 8-bit chunk linearly, regardless of platform. 766c6fd2807SJeff Garzik * 767c6fd2807SJeff Garzik * LOCKING: 768c6fd2807SJeff Garzik * caller. 769c6fd2807SJeff Garzik */ 770c6fd2807SJeff Garzik 771c6fd2807SJeff Garzik void ata_id_string(const u16 *id, unsigned char *s, 772c6fd2807SJeff Garzik unsigned int ofs, unsigned int len) 773c6fd2807SJeff Garzik { 774c6fd2807SJeff Garzik unsigned int c; 775c6fd2807SJeff Garzik 776c6fd2807SJeff Garzik while (len > 0) { 777c6fd2807SJeff Garzik c = id[ofs] >> 8; 778c6fd2807SJeff Garzik *s = c; 779c6fd2807SJeff Garzik s++; 780c6fd2807SJeff Garzik 781c6fd2807SJeff Garzik c = id[ofs] & 0xff; 782c6fd2807SJeff Garzik *s = c; 783c6fd2807SJeff Garzik s++; 784c6fd2807SJeff Garzik 785c6fd2807SJeff Garzik ofs++; 786c6fd2807SJeff Garzik len -= 2; 787c6fd2807SJeff Garzik } 788c6fd2807SJeff Garzik } 789c6fd2807SJeff Garzik 790c6fd2807SJeff Garzik /** 791c6fd2807SJeff Garzik * ata_id_c_string - Convert IDENTIFY DEVICE page into C string 792c6fd2807SJeff Garzik * @id: IDENTIFY DEVICE results we will examine 793c6fd2807SJeff Garzik * @s: string into which data is output 794c6fd2807SJeff Garzik * @ofs: offset into identify device page 795c6fd2807SJeff Garzik * @len: length of string to return. must be an odd number. 796c6fd2807SJeff Garzik * 797c6fd2807SJeff Garzik * This function is identical to ata_id_string except that it 798c6fd2807SJeff Garzik * trims trailing spaces and terminates the resulting string with 799c6fd2807SJeff Garzik * null. @len must be actual maximum length (even number) + 1. 800c6fd2807SJeff Garzik * 801c6fd2807SJeff Garzik * LOCKING: 802c6fd2807SJeff Garzik * caller. 803c6fd2807SJeff Garzik */ 804c6fd2807SJeff Garzik void ata_id_c_string(const u16 *id, unsigned char *s, 805c6fd2807SJeff Garzik unsigned int ofs, unsigned int len) 806c6fd2807SJeff Garzik { 807c6fd2807SJeff Garzik unsigned char *p; 808c6fd2807SJeff Garzik 809c6fd2807SJeff Garzik WARN_ON(!(len & 1)); 810c6fd2807SJeff Garzik 811c6fd2807SJeff Garzik ata_id_string(id, s, ofs, len - 1); 812c6fd2807SJeff Garzik 813c6fd2807SJeff Garzik p = s + strnlen(s, len - 1); 814c6fd2807SJeff Garzik while (p > s && p[-1] == ' ') 815c6fd2807SJeff Garzik p--; 816c6fd2807SJeff Garzik *p = '\0'; 817c6fd2807SJeff Garzik } 818c6fd2807SJeff Garzik 8191e999736SAlan Cox static u64 ata_tf_to_lba48(struct ata_taskfile *tf) 8201e999736SAlan Cox { 8211e999736SAlan Cox u64 sectors = 0; 8221e999736SAlan Cox 8231e999736SAlan Cox sectors |= ((u64)(tf->hob_lbah & 0xff)) << 40; 8241e999736SAlan Cox sectors |= ((u64)(tf->hob_lbam & 0xff)) << 32; 8251e999736SAlan Cox sectors |= (tf->hob_lbal & 0xff) << 24; 8261e999736SAlan Cox sectors |= (tf->lbah & 0xff) << 16; 8271e999736SAlan Cox sectors |= (tf->lbam & 0xff) << 8; 8281e999736SAlan Cox sectors |= (tf->lbal & 0xff); 8291e999736SAlan Cox 8301e999736SAlan Cox return ++sectors; 8311e999736SAlan Cox } 8321e999736SAlan Cox 8331e999736SAlan Cox static u64 ata_tf_to_lba(struct ata_taskfile *tf) 8341e999736SAlan Cox { 8351e999736SAlan Cox u64 sectors = 0; 8361e999736SAlan Cox 8371e999736SAlan Cox sectors |= (tf->device & 0x0f) << 24; 8381e999736SAlan Cox sectors |= (tf->lbah & 0xff) << 16; 8391e999736SAlan Cox sectors |= (tf->lbam & 0xff) << 8; 8401e999736SAlan Cox sectors |= (tf->lbal & 0xff); 8411e999736SAlan Cox 8421e999736SAlan Cox return ++sectors; 8431e999736SAlan Cox } 8441e999736SAlan Cox 8451e999736SAlan Cox /** 8461e999736SAlan Cox * ata_read_native_max_address_ext - LBA48 native max query 8471e999736SAlan Cox * @dev: Device to query 8481e999736SAlan Cox * 8491e999736SAlan Cox * Perform an LBA48 size query upon the device in question. Return the 8501e999736SAlan Cox * actual LBA48 size or zero if the command fails. 8511e999736SAlan Cox */ 8521e999736SAlan Cox 8531e999736SAlan Cox static u64 ata_read_native_max_address_ext(struct ata_device *dev) 8541e999736SAlan Cox { 8551e999736SAlan Cox unsigned int err; 8561e999736SAlan Cox struct ata_taskfile tf; 8571e999736SAlan Cox 8581e999736SAlan Cox ata_tf_init(dev, &tf); 8591e999736SAlan Cox 8601e999736SAlan Cox tf.command = ATA_CMD_READ_NATIVE_MAX_EXT; 8611e999736SAlan Cox tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48 | ATA_TFLAG_ISADDR; 8621e999736SAlan Cox tf.protocol |= ATA_PROT_NODATA; 8631e999736SAlan Cox tf.device |= 0x40; 8641e999736SAlan Cox 8651e999736SAlan Cox err = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0); 8661e999736SAlan Cox if (err) 8671e999736SAlan Cox return 0; 8681e999736SAlan Cox 8691e999736SAlan Cox return ata_tf_to_lba48(&tf); 8701e999736SAlan Cox } 8711e999736SAlan Cox 8721e999736SAlan Cox /** 8731e999736SAlan Cox * ata_read_native_max_address - LBA28 native max query 8741e999736SAlan Cox * @dev: Device to query 8751e999736SAlan Cox * 8761e999736SAlan Cox * Performa an LBA28 size query upon the device in question. Return the 8771e999736SAlan Cox * actual LBA28 size or zero if the command fails. 8781e999736SAlan Cox */ 8791e999736SAlan Cox 8801e999736SAlan Cox static u64 ata_read_native_max_address(struct ata_device *dev) 8811e999736SAlan Cox { 8821e999736SAlan Cox unsigned int err; 8831e999736SAlan Cox struct ata_taskfile tf; 8841e999736SAlan Cox 8851e999736SAlan Cox ata_tf_init(dev, &tf); 8861e999736SAlan Cox 8871e999736SAlan Cox tf.command = ATA_CMD_READ_NATIVE_MAX; 8881e999736SAlan Cox tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; 8891e999736SAlan Cox tf.protocol |= ATA_PROT_NODATA; 8901e999736SAlan Cox tf.device |= 0x40; 8911e999736SAlan Cox 8921e999736SAlan Cox err = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0); 8931e999736SAlan Cox if (err) 8941e999736SAlan Cox return 0; 8951e999736SAlan Cox 8961e999736SAlan Cox return ata_tf_to_lba(&tf); 8971e999736SAlan Cox } 8981e999736SAlan Cox 8991e999736SAlan Cox /** 9001e999736SAlan Cox * ata_set_native_max_address_ext - LBA48 native max set 9011e999736SAlan Cox * @dev: Device to query 9026b38d1d1SRandy Dunlap * @new_sectors: new max sectors value to set for the device 9031e999736SAlan Cox * 9041e999736SAlan Cox * Perform an LBA48 size set max upon the device in question. Return the 9051e999736SAlan Cox * actual LBA48 size or zero if the command fails. 9061e999736SAlan Cox */ 9071e999736SAlan Cox 9081e999736SAlan Cox static u64 ata_set_native_max_address_ext(struct ata_device *dev, u64 new_sectors) 9091e999736SAlan Cox { 9101e999736SAlan Cox unsigned int err; 9111e999736SAlan Cox struct ata_taskfile tf; 9121e999736SAlan Cox 9131e999736SAlan Cox new_sectors--; 9141e999736SAlan Cox 9151e999736SAlan Cox ata_tf_init(dev, &tf); 9161e999736SAlan Cox 9171e999736SAlan Cox tf.command = ATA_CMD_SET_MAX_EXT; 9181e999736SAlan Cox tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48 | ATA_TFLAG_ISADDR; 9191e999736SAlan Cox tf.protocol |= ATA_PROT_NODATA; 9201e999736SAlan Cox tf.device |= 0x40; 9211e999736SAlan Cox 9221e999736SAlan Cox tf.lbal = (new_sectors >> 0) & 0xff; 9231e999736SAlan Cox tf.lbam = (new_sectors >> 8) & 0xff; 9241e999736SAlan Cox tf.lbah = (new_sectors >> 16) & 0xff; 9251e999736SAlan Cox 9261e999736SAlan Cox tf.hob_lbal = (new_sectors >> 24) & 0xff; 9271e999736SAlan Cox tf.hob_lbam = (new_sectors >> 32) & 0xff; 9281e999736SAlan Cox tf.hob_lbah = (new_sectors >> 40) & 0xff; 9291e999736SAlan Cox 9301e999736SAlan Cox err = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0); 9311e999736SAlan Cox if (err) 9321e999736SAlan Cox return 0; 9331e999736SAlan Cox 9341e999736SAlan Cox return ata_tf_to_lba48(&tf); 9351e999736SAlan Cox } 9361e999736SAlan Cox 9371e999736SAlan Cox /** 9381e999736SAlan Cox * ata_set_native_max_address - LBA28 native max set 9391e999736SAlan Cox * @dev: Device to query 9406b38d1d1SRandy Dunlap * @new_sectors: new max sectors value to set for the device 9411e999736SAlan Cox * 9421e999736SAlan Cox * Perform an LBA28 size set max upon the device in question. Return the 9431e999736SAlan Cox * actual LBA28 size or zero if the command fails. 9441e999736SAlan Cox */ 9451e999736SAlan Cox 9461e999736SAlan Cox static u64 ata_set_native_max_address(struct ata_device *dev, u64 new_sectors) 9471e999736SAlan Cox { 9481e999736SAlan Cox unsigned int err; 9491e999736SAlan Cox struct ata_taskfile tf; 9501e999736SAlan Cox 9511e999736SAlan Cox new_sectors--; 9521e999736SAlan Cox 9531e999736SAlan Cox ata_tf_init(dev, &tf); 9541e999736SAlan Cox 9551e999736SAlan Cox tf.command = ATA_CMD_SET_MAX; 9561e999736SAlan Cox tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; 9571e999736SAlan Cox tf.protocol |= ATA_PROT_NODATA; 9581e999736SAlan Cox 9591e999736SAlan Cox tf.lbal = (new_sectors >> 0) & 0xff; 9601e999736SAlan Cox tf.lbam = (new_sectors >> 8) & 0xff; 9611e999736SAlan Cox tf.lbah = (new_sectors >> 16) & 0xff; 9621e999736SAlan Cox tf.device |= ((new_sectors >> 24) & 0x0f) | 0x40; 9631e999736SAlan Cox 9641e999736SAlan Cox err = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0); 9651e999736SAlan Cox if (err) 9661e999736SAlan Cox return 0; 9671e999736SAlan Cox 9681e999736SAlan Cox return ata_tf_to_lba(&tf); 9691e999736SAlan Cox } 9701e999736SAlan Cox 9711e999736SAlan Cox /** 9721e999736SAlan Cox * ata_hpa_resize - Resize a device with an HPA set 9731e999736SAlan Cox * @dev: Device to resize 9741e999736SAlan Cox * 9751e999736SAlan Cox * Read the size of an LBA28 or LBA48 disk with HPA features and resize 9761e999736SAlan Cox * it if required to the full size of the media. The caller must check 9771e999736SAlan Cox * the drive has the HPA feature set enabled. 9781e999736SAlan Cox */ 9791e999736SAlan Cox 9801e999736SAlan Cox static u64 ata_hpa_resize(struct ata_device *dev) 9811e999736SAlan Cox { 9821e999736SAlan Cox u64 sectors = dev->n_sectors; 9831e999736SAlan Cox u64 hpa_sectors; 9841e999736SAlan Cox 9851e999736SAlan Cox if (ata_id_has_lba48(dev->id)) 9861e999736SAlan Cox hpa_sectors = ata_read_native_max_address_ext(dev); 9871e999736SAlan Cox else 9881e999736SAlan Cox hpa_sectors = ata_read_native_max_address(dev); 9891e999736SAlan Cox 9901e999736SAlan Cox if (hpa_sectors > sectors) { 9911e999736SAlan Cox ata_dev_printk(dev, KERN_INFO, 9921e999736SAlan Cox "Host Protected Area detected:\n" 9931e999736SAlan Cox "\tcurrent size: %lld sectors\n" 9941e999736SAlan Cox "\tnative size: %lld sectors\n", 995bd1d5ec6SAndrew Morton (long long)sectors, (long long)hpa_sectors); 9961e999736SAlan Cox 9971e999736SAlan Cox if (ata_ignore_hpa) { 9981e999736SAlan Cox if (ata_id_has_lba48(dev->id)) 9991e999736SAlan Cox hpa_sectors = ata_set_native_max_address_ext(dev, hpa_sectors); 10001e999736SAlan Cox else 1001bd1d5ec6SAndrew Morton hpa_sectors = ata_set_native_max_address(dev, 1002bd1d5ec6SAndrew Morton hpa_sectors); 10031e999736SAlan Cox 10041e999736SAlan Cox if (hpa_sectors) { 1005bd1d5ec6SAndrew Morton ata_dev_printk(dev, KERN_INFO, "native size " 1006bd1d5ec6SAndrew Morton "increased to %lld sectors\n", 1007bd1d5ec6SAndrew Morton (long long)hpa_sectors); 10081e999736SAlan Cox return hpa_sectors; 10091e999736SAlan Cox } 10101e999736SAlan Cox } 101137301a55STejun Heo } else if (hpa_sectors < sectors) 101237301a55STejun Heo ata_dev_printk(dev, KERN_WARNING, "%s 1: hpa sectors (%lld) " 101337301a55STejun Heo "is smaller than sectors (%lld)\n", __FUNCTION__, 101437301a55STejun Heo (long long)hpa_sectors, (long long)sectors); 101537301a55STejun Heo 10161e999736SAlan Cox return sectors; 10171e999736SAlan Cox } 10181e999736SAlan Cox 1019c6fd2807SJeff Garzik static u64 ata_id_n_sectors(const u16 *id) 1020c6fd2807SJeff Garzik { 1021c6fd2807SJeff Garzik if (ata_id_has_lba(id)) { 1022c6fd2807SJeff Garzik if (ata_id_has_lba48(id)) 1023c6fd2807SJeff Garzik return ata_id_u64(id, 100); 1024c6fd2807SJeff Garzik else 1025c6fd2807SJeff Garzik return ata_id_u32(id, 60); 1026c6fd2807SJeff Garzik } else { 1027c6fd2807SJeff Garzik if (ata_id_current_chs_valid(id)) 1028c6fd2807SJeff Garzik return ata_id_u32(id, 57); 1029c6fd2807SJeff Garzik else 1030c6fd2807SJeff Garzik return id[1] * id[3] * id[6]; 1031c6fd2807SJeff Garzik } 1032c6fd2807SJeff Garzik } 1033c6fd2807SJeff Garzik 1034c6fd2807SJeff Garzik /** 103510305f0fSAlan * ata_id_to_dma_mode - Identify DMA mode from id block 103610305f0fSAlan * @dev: device to identify 1037cc261267SRandy Dunlap * @unknown: mode to assume if we cannot tell 103810305f0fSAlan * 103910305f0fSAlan * Set up the timing values for the device based upon the identify 104010305f0fSAlan * reported values for the DMA mode. This function is used by drivers 104110305f0fSAlan * which rely upon firmware configured modes, but wish to report the 104210305f0fSAlan * mode correctly when possible. 104310305f0fSAlan * 104410305f0fSAlan * In addition we emit similarly formatted messages to the default 104510305f0fSAlan * ata_dev_set_mode handler, in order to provide consistency of 104610305f0fSAlan * presentation. 104710305f0fSAlan */ 104810305f0fSAlan 104910305f0fSAlan void ata_id_to_dma_mode(struct ata_device *dev, u8 unknown) 105010305f0fSAlan { 105110305f0fSAlan unsigned int mask; 105210305f0fSAlan u8 mode; 105310305f0fSAlan 105410305f0fSAlan /* Pack the DMA modes */ 105510305f0fSAlan mask = ((dev->id[63] >> 8) << ATA_SHIFT_MWDMA) & ATA_MASK_MWDMA; 105610305f0fSAlan if (dev->id[53] & 0x04) 105710305f0fSAlan mask |= ((dev->id[88] >> 8) << ATA_SHIFT_UDMA) & ATA_MASK_UDMA; 105810305f0fSAlan 105910305f0fSAlan /* Select the mode in use */ 106010305f0fSAlan mode = ata_xfer_mask2mode(mask); 106110305f0fSAlan 106210305f0fSAlan if (mode != 0) { 106310305f0fSAlan ata_dev_printk(dev, KERN_INFO, "configured for %s\n", 106410305f0fSAlan ata_mode_string(mask)); 106510305f0fSAlan } else { 106610305f0fSAlan /* SWDMA perhaps ? */ 106710305f0fSAlan mode = unknown; 106810305f0fSAlan ata_dev_printk(dev, KERN_INFO, "configured for DMA\n"); 106910305f0fSAlan } 107010305f0fSAlan 107110305f0fSAlan /* Configure the device reporting */ 107210305f0fSAlan dev->xfer_mode = mode; 107310305f0fSAlan dev->xfer_shift = ata_xfer_mode2shift(mode); 107410305f0fSAlan } 107510305f0fSAlan 107610305f0fSAlan /** 1077c6fd2807SJeff Garzik * ata_noop_dev_select - Select device 0/1 on ATA bus 1078c6fd2807SJeff Garzik * @ap: ATA channel to manipulate 1079c6fd2807SJeff Garzik * @device: ATA device (numbered from zero) to select 1080c6fd2807SJeff Garzik * 1081c6fd2807SJeff Garzik * This function performs no actual function. 1082c6fd2807SJeff Garzik * 1083c6fd2807SJeff Garzik * May be used as the dev_select() entry in ata_port_operations. 1084c6fd2807SJeff Garzik * 1085c6fd2807SJeff Garzik * LOCKING: 1086c6fd2807SJeff Garzik * caller. 1087c6fd2807SJeff Garzik */ 1088c6fd2807SJeff Garzik void ata_noop_dev_select (struct ata_port *ap, unsigned int device) 1089c6fd2807SJeff Garzik { 1090c6fd2807SJeff Garzik } 1091c6fd2807SJeff Garzik 1092c6fd2807SJeff Garzik 1093c6fd2807SJeff Garzik /** 1094c6fd2807SJeff Garzik * ata_std_dev_select - Select device 0/1 on ATA bus 1095c6fd2807SJeff Garzik * @ap: ATA channel to manipulate 1096c6fd2807SJeff Garzik * @device: ATA device (numbered from zero) to select 1097c6fd2807SJeff Garzik * 1098c6fd2807SJeff Garzik * Use the method defined in the ATA specification to 1099c6fd2807SJeff Garzik * make either device 0, or device 1, active on the 1100c6fd2807SJeff Garzik * ATA channel. Works with both PIO and MMIO. 1101c6fd2807SJeff Garzik * 1102c6fd2807SJeff Garzik * May be used as the dev_select() entry in ata_port_operations. 1103c6fd2807SJeff Garzik * 1104c6fd2807SJeff Garzik * LOCKING: 1105c6fd2807SJeff Garzik * caller. 1106c6fd2807SJeff Garzik */ 1107c6fd2807SJeff Garzik 1108c6fd2807SJeff Garzik void ata_std_dev_select (struct ata_port *ap, unsigned int device) 1109c6fd2807SJeff Garzik { 1110c6fd2807SJeff Garzik u8 tmp; 1111c6fd2807SJeff Garzik 1112c6fd2807SJeff Garzik if (device == 0) 1113c6fd2807SJeff Garzik tmp = ATA_DEVICE_OBS; 1114c6fd2807SJeff Garzik else 1115c6fd2807SJeff Garzik tmp = ATA_DEVICE_OBS | ATA_DEV1; 1116c6fd2807SJeff Garzik 11170d5ff566STejun Heo iowrite8(tmp, ap->ioaddr.device_addr); 1118c6fd2807SJeff Garzik ata_pause(ap); /* needed; also flushes, for mmio */ 1119c6fd2807SJeff Garzik } 1120c6fd2807SJeff Garzik 1121c6fd2807SJeff Garzik /** 1122c6fd2807SJeff Garzik * ata_dev_select - Select device 0/1 on ATA bus 1123c6fd2807SJeff Garzik * @ap: ATA channel to manipulate 1124c6fd2807SJeff Garzik * @device: ATA device (numbered from zero) to select 1125c6fd2807SJeff Garzik * @wait: non-zero to wait for Status register BSY bit to clear 1126c6fd2807SJeff Garzik * @can_sleep: non-zero if context allows sleeping 1127c6fd2807SJeff Garzik * 1128c6fd2807SJeff Garzik * Use the method defined in the ATA specification to 1129c6fd2807SJeff Garzik * make either device 0, or device 1, active on the 1130c6fd2807SJeff Garzik * ATA channel. 1131c6fd2807SJeff Garzik * 1132c6fd2807SJeff Garzik * This is a high-level version of ata_std_dev_select(), 1133c6fd2807SJeff Garzik * which additionally provides the services of inserting 1134c6fd2807SJeff Garzik * the proper pauses and status polling, where needed. 1135c6fd2807SJeff Garzik * 1136c6fd2807SJeff Garzik * LOCKING: 1137c6fd2807SJeff Garzik * caller. 1138c6fd2807SJeff Garzik */ 1139c6fd2807SJeff Garzik 1140c6fd2807SJeff Garzik void ata_dev_select(struct ata_port *ap, unsigned int device, 1141c6fd2807SJeff Garzik unsigned int wait, unsigned int can_sleep) 1142c6fd2807SJeff Garzik { 1143c6fd2807SJeff Garzik if (ata_msg_probe(ap)) 114444877b4eSTejun Heo ata_port_printk(ap, KERN_INFO, "ata_dev_select: ENTER, " 114544877b4eSTejun Heo "device %u, wait %u\n", device, wait); 1146c6fd2807SJeff Garzik 1147c6fd2807SJeff Garzik if (wait) 1148c6fd2807SJeff Garzik ata_wait_idle(ap); 1149c6fd2807SJeff Garzik 1150c6fd2807SJeff Garzik ap->ops->dev_select(ap, device); 1151c6fd2807SJeff Garzik 1152c6fd2807SJeff Garzik if (wait) { 1153c6fd2807SJeff Garzik if (can_sleep && ap->device[device].class == ATA_DEV_ATAPI) 1154c6fd2807SJeff Garzik msleep(150); 1155c6fd2807SJeff Garzik ata_wait_idle(ap); 1156c6fd2807SJeff Garzik } 1157c6fd2807SJeff Garzik } 1158c6fd2807SJeff Garzik 1159c6fd2807SJeff Garzik /** 1160c6fd2807SJeff Garzik * ata_dump_id - IDENTIFY DEVICE info debugging output 1161c6fd2807SJeff Garzik * @id: IDENTIFY DEVICE page to dump 1162c6fd2807SJeff Garzik * 1163c6fd2807SJeff Garzik * Dump selected 16-bit words from the given IDENTIFY DEVICE 1164c6fd2807SJeff Garzik * page. 1165c6fd2807SJeff Garzik * 1166c6fd2807SJeff Garzik * LOCKING: 1167c6fd2807SJeff Garzik * caller. 1168c6fd2807SJeff Garzik */ 1169c6fd2807SJeff Garzik 1170c6fd2807SJeff Garzik static inline void ata_dump_id(const u16 *id) 1171c6fd2807SJeff Garzik { 1172c6fd2807SJeff Garzik DPRINTK("49==0x%04x " 1173c6fd2807SJeff Garzik "53==0x%04x " 1174c6fd2807SJeff Garzik "63==0x%04x " 1175c6fd2807SJeff Garzik "64==0x%04x " 1176c6fd2807SJeff Garzik "75==0x%04x \n", 1177c6fd2807SJeff Garzik id[49], 1178c6fd2807SJeff Garzik id[53], 1179c6fd2807SJeff Garzik id[63], 1180c6fd2807SJeff Garzik id[64], 1181c6fd2807SJeff Garzik id[75]); 1182c6fd2807SJeff Garzik DPRINTK("80==0x%04x " 1183c6fd2807SJeff Garzik "81==0x%04x " 1184c6fd2807SJeff Garzik "82==0x%04x " 1185c6fd2807SJeff Garzik "83==0x%04x " 1186c6fd2807SJeff Garzik "84==0x%04x \n", 1187c6fd2807SJeff Garzik id[80], 1188c6fd2807SJeff Garzik id[81], 1189c6fd2807SJeff Garzik id[82], 1190c6fd2807SJeff Garzik id[83], 1191c6fd2807SJeff Garzik id[84]); 1192c6fd2807SJeff Garzik DPRINTK("88==0x%04x " 1193c6fd2807SJeff Garzik "93==0x%04x\n", 1194c6fd2807SJeff Garzik id[88], 1195c6fd2807SJeff Garzik id[93]); 1196c6fd2807SJeff Garzik } 1197c6fd2807SJeff Garzik 1198c6fd2807SJeff Garzik /** 1199c6fd2807SJeff Garzik * ata_id_xfermask - Compute xfermask from the given IDENTIFY data 1200c6fd2807SJeff Garzik * @id: IDENTIFY data to compute xfer mask from 1201c6fd2807SJeff Garzik * 1202c6fd2807SJeff Garzik * Compute the xfermask for this device. This is not as trivial 1203c6fd2807SJeff Garzik * as it seems if we must consider early devices correctly. 1204c6fd2807SJeff Garzik * 1205c6fd2807SJeff Garzik * FIXME: pre IDE drive timing (do we care ?). 1206c6fd2807SJeff Garzik * 1207c6fd2807SJeff Garzik * LOCKING: 1208c6fd2807SJeff Garzik * None. 1209c6fd2807SJeff Garzik * 1210c6fd2807SJeff Garzik * RETURNS: 1211c6fd2807SJeff Garzik * Computed xfermask 1212c6fd2807SJeff Garzik */ 1213c6fd2807SJeff Garzik static unsigned int ata_id_xfermask(const u16 *id) 1214c6fd2807SJeff Garzik { 1215c6fd2807SJeff Garzik unsigned int pio_mask, mwdma_mask, udma_mask; 1216c6fd2807SJeff Garzik 1217c6fd2807SJeff Garzik /* Usual case. Word 53 indicates word 64 is valid */ 1218c6fd2807SJeff Garzik if (id[ATA_ID_FIELD_VALID] & (1 << 1)) { 1219c6fd2807SJeff Garzik pio_mask = id[ATA_ID_PIO_MODES] & 0x03; 1220c6fd2807SJeff Garzik pio_mask <<= 3; 1221c6fd2807SJeff Garzik pio_mask |= 0x7; 1222c6fd2807SJeff Garzik } else { 1223c6fd2807SJeff Garzik /* If word 64 isn't valid then Word 51 high byte holds 1224c6fd2807SJeff Garzik * the PIO timing number for the maximum. Turn it into 1225c6fd2807SJeff Garzik * a mask. 1226c6fd2807SJeff Garzik */ 12277a0f1c8aSLennert Buytenhek u8 mode = (id[ATA_ID_OLD_PIO_MODES] >> 8) & 0xFF; 122846767aebSAlan Cox if (mode < 5) /* Valid PIO range */ 122946767aebSAlan Cox pio_mask = (2 << mode) - 1; 123046767aebSAlan Cox else 123146767aebSAlan Cox pio_mask = 1; 1232c6fd2807SJeff Garzik 1233c6fd2807SJeff Garzik /* But wait.. there's more. Design your standards by 1234c6fd2807SJeff Garzik * committee and you too can get a free iordy field to 1235c6fd2807SJeff Garzik * process. However its the speeds not the modes that 1236c6fd2807SJeff Garzik * are supported... Note drivers using the timing API 1237c6fd2807SJeff Garzik * will get this right anyway 1238c6fd2807SJeff Garzik */ 1239c6fd2807SJeff Garzik } 1240c6fd2807SJeff Garzik 1241c6fd2807SJeff Garzik mwdma_mask = id[ATA_ID_MWDMA_MODES] & 0x07; 1242c6fd2807SJeff Garzik 1243b352e57dSAlan Cox if (ata_id_is_cfa(id)) { 1244b352e57dSAlan Cox /* 1245b352e57dSAlan Cox * Process compact flash extended modes 1246b352e57dSAlan Cox */ 1247b352e57dSAlan Cox int pio = id[163] & 0x7; 1248b352e57dSAlan Cox int dma = (id[163] >> 3) & 7; 1249b352e57dSAlan Cox 1250b352e57dSAlan Cox if (pio) 1251b352e57dSAlan Cox pio_mask |= (1 << 5); 1252b352e57dSAlan Cox if (pio > 1) 1253b352e57dSAlan Cox pio_mask |= (1 << 6); 1254b352e57dSAlan Cox if (dma) 1255b352e57dSAlan Cox mwdma_mask |= (1 << 3); 1256b352e57dSAlan Cox if (dma > 1) 1257b352e57dSAlan Cox mwdma_mask |= (1 << 4); 1258b352e57dSAlan Cox } 1259b352e57dSAlan Cox 1260c6fd2807SJeff Garzik udma_mask = 0; 1261c6fd2807SJeff Garzik if (id[ATA_ID_FIELD_VALID] & (1 << 2)) 1262c6fd2807SJeff Garzik udma_mask = id[ATA_ID_UDMA_MODES] & 0xff; 1263c6fd2807SJeff Garzik 1264c6fd2807SJeff Garzik return ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask); 1265c6fd2807SJeff Garzik } 1266c6fd2807SJeff Garzik 1267c6fd2807SJeff Garzik /** 1268c6fd2807SJeff Garzik * ata_port_queue_task - Queue port_task 1269c6fd2807SJeff Garzik * @ap: The ata_port to queue port_task for 1270c6fd2807SJeff Garzik * @fn: workqueue function to be scheduled 127165f27f38SDavid Howells * @data: data for @fn to use 1272c6fd2807SJeff Garzik * @delay: delay time for workqueue function 1273c6fd2807SJeff Garzik * 1274c6fd2807SJeff Garzik * Schedule @fn(@data) for execution after @delay jiffies using 1275c6fd2807SJeff Garzik * port_task. There is one port_task per port and it's the 1276c6fd2807SJeff Garzik * user(low level driver)'s responsibility to make sure that only 1277c6fd2807SJeff Garzik * one task is active at any given time. 1278c6fd2807SJeff Garzik * 1279c6fd2807SJeff Garzik * libata core layer takes care of synchronization between 1280c6fd2807SJeff Garzik * port_task and EH. ata_port_queue_task() may be ignored for EH 1281c6fd2807SJeff Garzik * synchronization. 1282c6fd2807SJeff Garzik * 1283c6fd2807SJeff Garzik * LOCKING: 1284c6fd2807SJeff Garzik * Inherited from caller. 1285c6fd2807SJeff Garzik */ 128665f27f38SDavid Howells void ata_port_queue_task(struct ata_port *ap, work_func_t fn, void *data, 1287c6fd2807SJeff Garzik unsigned long delay) 1288c6fd2807SJeff Garzik { 128965f27f38SDavid Howells PREPARE_DELAYED_WORK(&ap->port_task, fn); 129065f27f38SDavid Howells ap->port_task_data = data; 1291c6fd2807SJeff Garzik 129245a66c1cSOleg Nesterov /* may fail if ata_port_flush_task() in progress */ 129345a66c1cSOleg Nesterov queue_delayed_work(ata_wq, &ap->port_task, delay); 1294c6fd2807SJeff Garzik } 1295c6fd2807SJeff Garzik 1296c6fd2807SJeff Garzik /** 1297c6fd2807SJeff Garzik * ata_port_flush_task - Flush port_task 1298c6fd2807SJeff Garzik * @ap: The ata_port to flush port_task for 1299c6fd2807SJeff Garzik * 1300c6fd2807SJeff Garzik * After this function completes, port_task is guranteed not to 1301c6fd2807SJeff Garzik * be running or scheduled. 1302c6fd2807SJeff Garzik * 1303c6fd2807SJeff Garzik * LOCKING: 1304c6fd2807SJeff Garzik * Kernel thread context (may sleep) 1305c6fd2807SJeff Garzik */ 1306c6fd2807SJeff Garzik void ata_port_flush_task(struct ata_port *ap) 1307c6fd2807SJeff Garzik { 1308c6fd2807SJeff Garzik DPRINTK("ENTER\n"); 1309c6fd2807SJeff Garzik 131045a66c1cSOleg Nesterov cancel_rearming_delayed_work(&ap->port_task); 1311c6fd2807SJeff Garzik 1312c6fd2807SJeff Garzik if (ata_msg_ctl(ap)) 1313c6fd2807SJeff Garzik ata_port_printk(ap, KERN_DEBUG, "%s: EXIT\n", __FUNCTION__); 1314c6fd2807SJeff Garzik } 1315c6fd2807SJeff Garzik 13167102d230SAdrian Bunk static void ata_qc_complete_internal(struct ata_queued_cmd *qc) 1317c6fd2807SJeff Garzik { 1318c6fd2807SJeff Garzik struct completion *waiting = qc->private_data; 1319c6fd2807SJeff Garzik 1320c6fd2807SJeff Garzik complete(waiting); 1321c6fd2807SJeff Garzik } 1322c6fd2807SJeff Garzik 1323c6fd2807SJeff Garzik /** 13242432697bSTejun Heo * ata_exec_internal_sg - execute libata internal command 1325c6fd2807SJeff Garzik * @dev: Device to which the command is sent 1326c6fd2807SJeff Garzik * @tf: Taskfile registers for the command and the result 1327c6fd2807SJeff Garzik * @cdb: CDB for packet command 1328c6fd2807SJeff Garzik * @dma_dir: Data tranfer direction of the command 13292432697bSTejun Heo * @sg: sg list for the data buffer of the command 13302432697bSTejun Heo * @n_elem: Number of sg entries 1331c6fd2807SJeff Garzik * 1332c6fd2807SJeff Garzik * Executes libata internal command with timeout. @tf contains 1333c6fd2807SJeff Garzik * command on entry and result on return. Timeout and error 1334c6fd2807SJeff Garzik * conditions are reported via return value. No recovery action 1335c6fd2807SJeff Garzik * is taken after a command times out. It's caller's duty to 1336c6fd2807SJeff Garzik * clean up after timeout. 1337c6fd2807SJeff Garzik * 1338c6fd2807SJeff Garzik * LOCKING: 1339c6fd2807SJeff Garzik * None. Should be called with kernel context, might sleep. 1340c6fd2807SJeff Garzik * 1341c6fd2807SJeff Garzik * RETURNS: 1342c6fd2807SJeff Garzik * Zero on success, AC_ERR_* mask on failure 1343c6fd2807SJeff Garzik */ 13442432697bSTejun Heo unsigned ata_exec_internal_sg(struct ata_device *dev, 1345c6fd2807SJeff Garzik struct ata_taskfile *tf, const u8 *cdb, 13462432697bSTejun Heo int dma_dir, struct scatterlist *sg, 13472432697bSTejun Heo unsigned int n_elem) 1348c6fd2807SJeff Garzik { 1349c6fd2807SJeff Garzik struct ata_port *ap = dev->ap; 1350c6fd2807SJeff Garzik u8 command = tf->command; 1351c6fd2807SJeff Garzik struct ata_queued_cmd *qc; 1352c6fd2807SJeff Garzik unsigned int tag, preempted_tag; 1353c6fd2807SJeff Garzik u32 preempted_sactive, preempted_qc_active; 1354c6fd2807SJeff Garzik DECLARE_COMPLETION_ONSTACK(wait); 1355c6fd2807SJeff Garzik unsigned long flags; 1356c6fd2807SJeff Garzik unsigned int err_mask; 1357c6fd2807SJeff Garzik int rc; 1358c6fd2807SJeff Garzik 1359c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 1360c6fd2807SJeff Garzik 1361c6fd2807SJeff Garzik /* no internal command while frozen */ 1362c6fd2807SJeff Garzik if (ap->pflags & ATA_PFLAG_FROZEN) { 1363c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 1364c6fd2807SJeff Garzik return AC_ERR_SYSTEM; 1365c6fd2807SJeff Garzik } 1366c6fd2807SJeff Garzik 1367c6fd2807SJeff Garzik /* initialize internal qc */ 1368c6fd2807SJeff Garzik 1369c6fd2807SJeff Garzik /* XXX: Tag 0 is used for drivers with legacy EH as some 1370c6fd2807SJeff Garzik * drivers choke if any other tag is given. This breaks 1371c6fd2807SJeff Garzik * ata_tag_internal() test for those drivers. Don't use new 1372c6fd2807SJeff Garzik * EH stuff without converting to it. 1373c6fd2807SJeff Garzik */ 1374c6fd2807SJeff Garzik if (ap->ops->error_handler) 1375c6fd2807SJeff Garzik tag = ATA_TAG_INTERNAL; 1376c6fd2807SJeff Garzik else 1377c6fd2807SJeff Garzik tag = 0; 1378c6fd2807SJeff Garzik 1379c6fd2807SJeff Garzik if (test_and_set_bit(tag, &ap->qc_allocated)) 1380c6fd2807SJeff Garzik BUG(); 1381c6fd2807SJeff Garzik qc = __ata_qc_from_tag(ap, tag); 1382c6fd2807SJeff Garzik 1383c6fd2807SJeff Garzik qc->tag = tag; 1384c6fd2807SJeff Garzik qc->scsicmd = NULL; 1385c6fd2807SJeff Garzik qc->ap = ap; 1386c6fd2807SJeff Garzik qc->dev = dev; 1387c6fd2807SJeff Garzik ata_qc_reinit(qc); 1388c6fd2807SJeff Garzik 1389c6fd2807SJeff Garzik preempted_tag = ap->active_tag; 1390c6fd2807SJeff Garzik preempted_sactive = ap->sactive; 1391c6fd2807SJeff Garzik preempted_qc_active = ap->qc_active; 1392c6fd2807SJeff Garzik ap->active_tag = ATA_TAG_POISON; 1393c6fd2807SJeff Garzik ap->sactive = 0; 1394c6fd2807SJeff Garzik ap->qc_active = 0; 1395c6fd2807SJeff Garzik 1396c6fd2807SJeff Garzik /* prepare & issue qc */ 1397c6fd2807SJeff Garzik qc->tf = *tf; 1398c6fd2807SJeff Garzik if (cdb) 1399c6fd2807SJeff Garzik memcpy(qc->cdb, cdb, ATAPI_CDB_LEN); 1400c6fd2807SJeff Garzik qc->flags |= ATA_QCFLAG_RESULT_TF; 1401c6fd2807SJeff Garzik qc->dma_dir = dma_dir; 1402c6fd2807SJeff Garzik if (dma_dir != DMA_NONE) { 14032432697bSTejun Heo unsigned int i, buflen = 0; 14042432697bSTejun Heo 14052432697bSTejun Heo for (i = 0; i < n_elem; i++) 14062432697bSTejun Heo buflen += sg[i].length; 14072432697bSTejun Heo 14082432697bSTejun Heo ata_sg_init(qc, sg, n_elem); 140949c80429SBrian King qc->nbytes = buflen; 1410c6fd2807SJeff Garzik } 1411c6fd2807SJeff Garzik 1412c6fd2807SJeff Garzik qc->private_data = &wait; 1413c6fd2807SJeff Garzik qc->complete_fn = ata_qc_complete_internal; 1414c6fd2807SJeff Garzik 1415c6fd2807SJeff Garzik ata_qc_issue(qc); 1416c6fd2807SJeff Garzik 1417c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 1418c6fd2807SJeff Garzik 1419c6fd2807SJeff Garzik rc = wait_for_completion_timeout(&wait, ata_probe_timeout); 1420c6fd2807SJeff Garzik 1421c6fd2807SJeff Garzik ata_port_flush_task(ap); 1422c6fd2807SJeff Garzik 1423c6fd2807SJeff Garzik if (!rc) { 1424c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 1425c6fd2807SJeff Garzik 1426c6fd2807SJeff Garzik /* We're racing with irq here. If we lose, the 1427c6fd2807SJeff Garzik * following test prevents us from completing the qc 1428c6fd2807SJeff Garzik * twice. If we win, the port is frozen and will be 1429c6fd2807SJeff Garzik * cleaned up by ->post_internal_cmd(). 1430c6fd2807SJeff Garzik */ 1431c6fd2807SJeff Garzik if (qc->flags & ATA_QCFLAG_ACTIVE) { 1432c6fd2807SJeff Garzik qc->err_mask |= AC_ERR_TIMEOUT; 1433c6fd2807SJeff Garzik 1434c6fd2807SJeff Garzik if (ap->ops->error_handler) 1435c6fd2807SJeff Garzik ata_port_freeze(ap); 1436c6fd2807SJeff Garzik else 1437c6fd2807SJeff Garzik ata_qc_complete(qc); 1438c6fd2807SJeff Garzik 1439c6fd2807SJeff Garzik if (ata_msg_warn(ap)) 1440c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_WARNING, 1441c6fd2807SJeff Garzik "qc timeout (cmd 0x%x)\n", command); 1442c6fd2807SJeff Garzik } 1443c6fd2807SJeff Garzik 1444c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 1445c6fd2807SJeff Garzik } 1446c6fd2807SJeff Garzik 1447c6fd2807SJeff Garzik /* do post_internal_cmd */ 1448c6fd2807SJeff Garzik if (ap->ops->post_internal_cmd) 1449c6fd2807SJeff Garzik ap->ops->post_internal_cmd(qc); 1450c6fd2807SJeff Garzik 1451a51d644aSTejun Heo /* perform minimal error analysis */ 1452a51d644aSTejun Heo if (qc->flags & ATA_QCFLAG_FAILED) { 1453a51d644aSTejun Heo if (qc->result_tf.command & (ATA_ERR | ATA_DF)) 1454a51d644aSTejun Heo qc->err_mask |= AC_ERR_DEV; 1455a51d644aSTejun Heo 1456a51d644aSTejun Heo if (!qc->err_mask) 1457c6fd2807SJeff Garzik qc->err_mask |= AC_ERR_OTHER; 1458a51d644aSTejun Heo 1459a51d644aSTejun Heo if (qc->err_mask & ~AC_ERR_OTHER) 1460a51d644aSTejun Heo qc->err_mask &= ~AC_ERR_OTHER; 1461c6fd2807SJeff Garzik } 1462c6fd2807SJeff Garzik 1463c6fd2807SJeff Garzik /* finish up */ 1464c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 1465c6fd2807SJeff Garzik 1466c6fd2807SJeff Garzik *tf = qc->result_tf; 1467c6fd2807SJeff Garzik err_mask = qc->err_mask; 1468c6fd2807SJeff Garzik 1469c6fd2807SJeff Garzik ata_qc_free(qc); 1470c6fd2807SJeff Garzik ap->active_tag = preempted_tag; 1471c6fd2807SJeff Garzik ap->sactive = preempted_sactive; 1472c6fd2807SJeff Garzik ap->qc_active = preempted_qc_active; 1473c6fd2807SJeff Garzik 1474c6fd2807SJeff Garzik /* XXX - Some LLDDs (sata_mv) disable port on command failure. 1475c6fd2807SJeff Garzik * Until those drivers are fixed, we detect the condition 1476c6fd2807SJeff Garzik * here, fail the command with AC_ERR_SYSTEM and reenable the 1477c6fd2807SJeff Garzik * port. 1478c6fd2807SJeff Garzik * 1479c6fd2807SJeff Garzik * Note that this doesn't change any behavior as internal 1480c6fd2807SJeff Garzik * command failure results in disabling the device in the 1481c6fd2807SJeff Garzik * higher layer for LLDDs without new reset/EH callbacks. 1482c6fd2807SJeff Garzik * 1483c6fd2807SJeff Garzik * Kill the following code as soon as those drivers are fixed. 1484c6fd2807SJeff Garzik */ 1485c6fd2807SJeff Garzik if (ap->flags & ATA_FLAG_DISABLED) { 1486c6fd2807SJeff Garzik err_mask |= AC_ERR_SYSTEM; 1487c6fd2807SJeff Garzik ata_port_probe(ap); 1488c6fd2807SJeff Garzik } 1489c6fd2807SJeff Garzik 1490c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 1491c6fd2807SJeff Garzik 1492c6fd2807SJeff Garzik return err_mask; 1493c6fd2807SJeff Garzik } 1494c6fd2807SJeff Garzik 1495c6fd2807SJeff Garzik /** 149633480a0eSTejun Heo * ata_exec_internal - execute libata internal command 14972432697bSTejun Heo * @dev: Device to which the command is sent 14982432697bSTejun Heo * @tf: Taskfile registers for the command and the result 14992432697bSTejun Heo * @cdb: CDB for packet command 15002432697bSTejun Heo * @dma_dir: Data tranfer direction of the command 15012432697bSTejun Heo * @buf: Data buffer of the command 15022432697bSTejun Heo * @buflen: Length of data buffer 15032432697bSTejun Heo * 15042432697bSTejun Heo * Wrapper around ata_exec_internal_sg() which takes simple 15052432697bSTejun Heo * buffer instead of sg list. 15062432697bSTejun Heo * 15072432697bSTejun Heo * LOCKING: 15082432697bSTejun Heo * None. Should be called with kernel context, might sleep. 15092432697bSTejun Heo * 15102432697bSTejun Heo * RETURNS: 15112432697bSTejun Heo * Zero on success, AC_ERR_* mask on failure 15122432697bSTejun Heo */ 15132432697bSTejun Heo unsigned ata_exec_internal(struct ata_device *dev, 15142432697bSTejun Heo struct ata_taskfile *tf, const u8 *cdb, 15152432697bSTejun Heo int dma_dir, void *buf, unsigned int buflen) 15162432697bSTejun Heo { 151733480a0eSTejun Heo struct scatterlist *psg = NULL, sg; 151833480a0eSTejun Heo unsigned int n_elem = 0; 15192432697bSTejun Heo 152033480a0eSTejun Heo if (dma_dir != DMA_NONE) { 152133480a0eSTejun Heo WARN_ON(!buf); 15222432697bSTejun Heo sg_init_one(&sg, buf, buflen); 152333480a0eSTejun Heo psg = &sg; 152433480a0eSTejun Heo n_elem++; 152533480a0eSTejun Heo } 15262432697bSTejun Heo 152733480a0eSTejun Heo return ata_exec_internal_sg(dev, tf, cdb, dma_dir, psg, n_elem); 15282432697bSTejun Heo } 15292432697bSTejun Heo 15302432697bSTejun Heo /** 1531c6fd2807SJeff Garzik * ata_do_simple_cmd - execute simple internal command 1532c6fd2807SJeff Garzik * @dev: Device to which the command is sent 1533c6fd2807SJeff Garzik * @cmd: Opcode to execute 1534c6fd2807SJeff Garzik * 1535c6fd2807SJeff Garzik * Execute a 'simple' command, that only consists of the opcode 1536c6fd2807SJeff Garzik * 'cmd' itself, without filling any other registers 1537c6fd2807SJeff Garzik * 1538c6fd2807SJeff Garzik * LOCKING: 1539c6fd2807SJeff Garzik * Kernel thread context (may sleep). 1540c6fd2807SJeff Garzik * 1541c6fd2807SJeff Garzik * RETURNS: 1542c6fd2807SJeff Garzik * Zero on success, AC_ERR_* mask on failure 1543c6fd2807SJeff Garzik */ 1544c6fd2807SJeff Garzik unsigned int ata_do_simple_cmd(struct ata_device *dev, u8 cmd) 1545c6fd2807SJeff Garzik { 1546c6fd2807SJeff Garzik struct ata_taskfile tf; 1547c6fd2807SJeff Garzik 1548c6fd2807SJeff Garzik ata_tf_init(dev, &tf); 1549c6fd2807SJeff Garzik 1550c6fd2807SJeff Garzik tf.command = cmd; 1551c6fd2807SJeff Garzik tf.flags |= ATA_TFLAG_DEVICE; 1552c6fd2807SJeff Garzik tf.protocol = ATA_PROT_NODATA; 1553c6fd2807SJeff Garzik 1554c6fd2807SJeff Garzik return ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0); 1555c6fd2807SJeff Garzik } 1556c6fd2807SJeff Garzik 1557c6fd2807SJeff Garzik /** 1558c6fd2807SJeff Garzik * ata_pio_need_iordy - check if iordy needed 1559c6fd2807SJeff Garzik * @adev: ATA device 1560c6fd2807SJeff Garzik * 1561c6fd2807SJeff Garzik * Check if the current speed of the device requires IORDY. Used 1562c6fd2807SJeff Garzik * by various controllers for chip configuration. 1563c6fd2807SJeff Garzik */ 1564c6fd2807SJeff Garzik 1565c6fd2807SJeff Garzik unsigned int ata_pio_need_iordy(const struct ata_device *adev) 1566c6fd2807SJeff Garzik { 1567432729f0SAlan Cox /* Controller doesn't support IORDY. Probably a pointless check 1568432729f0SAlan Cox as the caller should know this */ 1569432729f0SAlan Cox if (adev->ap->flags & ATA_FLAG_NO_IORDY) 1570c6fd2807SJeff Garzik return 0; 1571432729f0SAlan Cox /* PIO3 and higher it is mandatory */ 1572432729f0SAlan Cox if (adev->pio_mode > XFER_PIO_2) 1573c6fd2807SJeff Garzik return 1; 1574432729f0SAlan Cox /* We turn it on when possible */ 1575432729f0SAlan Cox if (ata_id_has_iordy(adev->id)) 1576432729f0SAlan Cox return 1; 1577432729f0SAlan Cox return 0; 1578432729f0SAlan Cox } 1579c6fd2807SJeff Garzik 1580432729f0SAlan Cox /** 1581432729f0SAlan Cox * ata_pio_mask_no_iordy - Return the non IORDY mask 1582432729f0SAlan Cox * @adev: ATA device 1583432729f0SAlan Cox * 1584432729f0SAlan Cox * Compute the highest mode possible if we are not using iordy. Return 1585432729f0SAlan Cox * -1 if no iordy mode is available. 1586432729f0SAlan Cox */ 1587432729f0SAlan Cox 1588432729f0SAlan Cox static u32 ata_pio_mask_no_iordy(const struct ata_device *adev) 1589432729f0SAlan Cox { 1590c6fd2807SJeff Garzik /* If we have no drive specific rule, then PIO 2 is non IORDY */ 1591c6fd2807SJeff Garzik if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE */ 1592432729f0SAlan Cox u16 pio = adev->id[ATA_ID_EIDE_PIO]; 1593c6fd2807SJeff Garzik /* Is the speed faster than the drive allows non IORDY ? */ 1594c6fd2807SJeff Garzik if (pio) { 1595c6fd2807SJeff Garzik /* This is cycle times not frequency - watch the logic! */ 1596c6fd2807SJeff Garzik if (pio > 240) /* PIO2 is 240nS per cycle */ 1597432729f0SAlan Cox return 3 << ATA_SHIFT_PIO; 1598432729f0SAlan Cox return 7 << ATA_SHIFT_PIO; 1599c6fd2807SJeff Garzik } 1600c6fd2807SJeff Garzik } 1601432729f0SAlan Cox return 3 << ATA_SHIFT_PIO; 1602c6fd2807SJeff Garzik } 1603c6fd2807SJeff Garzik 1604c6fd2807SJeff Garzik /** 1605c6fd2807SJeff Garzik * ata_dev_read_id - Read ID data from the specified device 1606c6fd2807SJeff Garzik * @dev: target device 1607c6fd2807SJeff Garzik * @p_class: pointer to class of the target device (may be changed) 1608bff04647STejun Heo * @flags: ATA_READID_* flags 1609c6fd2807SJeff Garzik * @id: buffer to read IDENTIFY data into 1610c6fd2807SJeff Garzik * 1611c6fd2807SJeff Garzik * Read ID data from the specified device. ATA_CMD_ID_ATA is 1612c6fd2807SJeff Garzik * performed on ATA devices and ATA_CMD_ID_ATAPI on ATAPI 1613c6fd2807SJeff Garzik * devices. This function also issues ATA_CMD_INIT_DEV_PARAMS 1614c6fd2807SJeff Garzik * for pre-ATA4 drives. 1615c6fd2807SJeff Garzik * 1616c6fd2807SJeff Garzik * LOCKING: 1617c6fd2807SJeff Garzik * Kernel thread context (may sleep) 1618c6fd2807SJeff Garzik * 1619c6fd2807SJeff Garzik * RETURNS: 1620c6fd2807SJeff Garzik * 0 on success, -errno otherwise. 1621c6fd2807SJeff Garzik */ 1622c6fd2807SJeff Garzik int ata_dev_read_id(struct ata_device *dev, unsigned int *p_class, 1623bff04647STejun Heo unsigned int flags, u16 *id) 1624c6fd2807SJeff Garzik { 1625c6fd2807SJeff Garzik struct ata_port *ap = dev->ap; 1626c6fd2807SJeff Garzik unsigned int class = *p_class; 1627c6fd2807SJeff Garzik struct ata_taskfile tf; 1628c6fd2807SJeff Garzik unsigned int err_mask = 0; 1629c6fd2807SJeff Garzik const char *reason; 163054936f8bSTejun Heo int may_fallback = 1, tried_spinup = 0; 1631c6fd2807SJeff Garzik int rc; 1632c6fd2807SJeff Garzik 1633c6fd2807SJeff Garzik if (ata_msg_ctl(ap)) 163444877b4eSTejun Heo ata_dev_printk(dev, KERN_DEBUG, "%s: ENTER\n", __FUNCTION__); 1635c6fd2807SJeff Garzik 1636c6fd2807SJeff Garzik ata_dev_select(ap, dev->devno, 1, 1); /* select device 0/1 */ 1637c6fd2807SJeff Garzik retry: 1638c6fd2807SJeff Garzik ata_tf_init(dev, &tf); 1639c6fd2807SJeff Garzik 1640c6fd2807SJeff Garzik switch (class) { 1641c6fd2807SJeff Garzik case ATA_DEV_ATA: 1642c6fd2807SJeff Garzik tf.command = ATA_CMD_ID_ATA; 1643c6fd2807SJeff Garzik break; 1644c6fd2807SJeff Garzik case ATA_DEV_ATAPI: 1645c6fd2807SJeff Garzik tf.command = ATA_CMD_ID_ATAPI; 1646c6fd2807SJeff Garzik break; 1647c6fd2807SJeff Garzik default: 1648c6fd2807SJeff Garzik rc = -ENODEV; 1649c6fd2807SJeff Garzik reason = "unsupported class"; 1650c6fd2807SJeff Garzik goto err_out; 1651c6fd2807SJeff Garzik } 1652c6fd2807SJeff Garzik 1653c6fd2807SJeff Garzik tf.protocol = ATA_PROT_PIO; 165481afe893STejun Heo 165581afe893STejun Heo /* Some devices choke if TF registers contain garbage. Make 165681afe893STejun Heo * sure those are properly initialized. 165781afe893STejun Heo */ 165881afe893STejun Heo tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 165981afe893STejun Heo 166081afe893STejun Heo /* Device presence detection is unreliable on some 166181afe893STejun Heo * controllers. Always poll IDENTIFY if available. 166281afe893STejun Heo */ 166381afe893STejun Heo tf.flags |= ATA_TFLAG_POLLING; 1664c6fd2807SJeff Garzik 1665c6fd2807SJeff Garzik err_mask = ata_exec_internal(dev, &tf, NULL, DMA_FROM_DEVICE, 1666c6fd2807SJeff Garzik id, sizeof(id[0]) * ATA_ID_WORDS); 1667c6fd2807SJeff Garzik if (err_mask) { 1668800b3996STejun Heo if (err_mask & AC_ERR_NODEV_HINT) { 166955a8e2c8STejun Heo DPRINTK("ata%u.%d: NODEV after polling detection\n", 167044877b4eSTejun Heo ap->print_id, dev->devno); 167155a8e2c8STejun Heo return -ENOENT; 167255a8e2c8STejun Heo } 167355a8e2c8STejun Heo 167454936f8bSTejun Heo /* Device or controller might have reported the wrong 167554936f8bSTejun Heo * device class. Give a shot at the other IDENTIFY if 167654936f8bSTejun Heo * the current one is aborted by the device. 167754936f8bSTejun Heo */ 167854936f8bSTejun Heo if (may_fallback && 167954936f8bSTejun Heo (err_mask == AC_ERR_DEV) && (tf.feature & ATA_ABORTED)) { 168054936f8bSTejun Heo may_fallback = 0; 168154936f8bSTejun Heo 168254936f8bSTejun Heo if (class == ATA_DEV_ATA) 168354936f8bSTejun Heo class = ATA_DEV_ATAPI; 168454936f8bSTejun Heo else 168554936f8bSTejun Heo class = ATA_DEV_ATA; 168654936f8bSTejun Heo goto retry; 168754936f8bSTejun Heo } 168854936f8bSTejun Heo 1689c6fd2807SJeff Garzik rc = -EIO; 1690c6fd2807SJeff Garzik reason = "I/O error"; 1691c6fd2807SJeff Garzik goto err_out; 1692c6fd2807SJeff Garzik } 1693c6fd2807SJeff Garzik 169454936f8bSTejun Heo /* Falling back doesn't make sense if ID data was read 169554936f8bSTejun Heo * successfully at least once. 169654936f8bSTejun Heo */ 169754936f8bSTejun Heo may_fallback = 0; 169854936f8bSTejun Heo 1699c6fd2807SJeff Garzik swap_buf_le16(id, ATA_ID_WORDS); 1700c6fd2807SJeff Garzik 1701c6fd2807SJeff Garzik /* sanity check */ 1702c6fd2807SJeff Garzik rc = -EINVAL; 17036070068bSAlan Cox reason = "device reports invalid type"; 17044a3381feSJeff Garzik 17054a3381feSJeff Garzik if (class == ATA_DEV_ATA) { 17064a3381feSJeff Garzik if (!ata_id_is_ata(id) && !ata_id_is_cfa(id)) 17074a3381feSJeff Garzik goto err_out; 17084a3381feSJeff Garzik } else { 17094a3381feSJeff Garzik if (ata_id_is_ata(id)) 1710c6fd2807SJeff Garzik goto err_out; 1711c6fd2807SJeff Garzik } 1712c6fd2807SJeff Garzik 1713169439c2SMark Lord if (!tried_spinup && (id[2] == 0x37c8 || id[2] == 0x738c)) { 1714169439c2SMark Lord tried_spinup = 1; 1715169439c2SMark Lord /* 1716169439c2SMark Lord * Drive powered-up in standby mode, and requires a specific 1717169439c2SMark Lord * SET_FEATURES spin-up subcommand before it will accept 1718169439c2SMark Lord * anything other than the original IDENTIFY command. 1719169439c2SMark Lord */ 1720169439c2SMark Lord ata_tf_init(dev, &tf); 1721169439c2SMark Lord tf.command = ATA_CMD_SET_FEATURES; 1722169439c2SMark Lord tf.feature = SETFEATURES_SPINUP; 1723169439c2SMark Lord tf.protocol = ATA_PROT_NODATA; 1724169439c2SMark Lord tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 1725169439c2SMark Lord err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0); 1726169439c2SMark Lord if (err_mask) { 1727169439c2SMark Lord rc = -EIO; 1728169439c2SMark Lord reason = "SPINUP failed"; 1729169439c2SMark Lord goto err_out; 1730169439c2SMark Lord } 1731169439c2SMark Lord /* 1732169439c2SMark Lord * If the drive initially returned incomplete IDENTIFY info, 1733169439c2SMark Lord * we now must reissue the IDENTIFY command. 1734169439c2SMark Lord */ 1735169439c2SMark Lord if (id[2] == 0x37c8) 1736169439c2SMark Lord goto retry; 1737169439c2SMark Lord } 1738169439c2SMark Lord 1739bff04647STejun Heo if ((flags & ATA_READID_POSTRESET) && class == ATA_DEV_ATA) { 1740c6fd2807SJeff Garzik /* 1741c6fd2807SJeff Garzik * The exact sequence expected by certain pre-ATA4 drives is: 1742c6fd2807SJeff Garzik * SRST RESET 1743c6fd2807SJeff Garzik * IDENTIFY 1744c6fd2807SJeff Garzik * INITIALIZE DEVICE PARAMETERS 1745c6fd2807SJeff Garzik * anything else.. 1746c6fd2807SJeff Garzik * Some drives were very specific about that exact sequence. 1747c6fd2807SJeff Garzik */ 1748c6fd2807SJeff Garzik if (ata_id_major_version(id) < 4 || !ata_id_has_lba(id)) { 1749c6fd2807SJeff Garzik err_mask = ata_dev_init_params(dev, id[3], id[6]); 1750c6fd2807SJeff Garzik if (err_mask) { 1751c6fd2807SJeff Garzik rc = -EIO; 1752c6fd2807SJeff Garzik reason = "INIT_DEV_PARAMS failed"; 1753c6fd2807SJeff Garzik goto err_out; 1754c6fd2807SJeff Garzik } 1755c6fd2807SJeff Garzik 1756c6fd2807SJeff Garzik /* current CHS translation info (id[53-58]) might be 1757c6fd2807SJeff Garzik * changed. reread the identify device info. 1758c6fd2807SJeff Garzik */ 1759bff04647STejun Heo flags &= ~ATA_READID_POSTRESET; 1760c6fd2807SJeff Garzik goto retry; 1761c6fd2807SJeff Garzik } 1762c6fd2807SJeff Garzik } 1763c6fd2807SJeff Garzik 1764c6fd2807SJeff Garzik *p_class = class; 1765c6fd2807SJeff Garzik 1766c6fd2807SJeff Garzik return 0; 1767c6fd2807SJeff Garzik 1768c6fd2807SJeff Garzik err_out: 1769c6fd2807SJeff Garzik if (ata_msg_warn(ap)) 1770c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_WARNING, "failed to IDENTIFY " 1771c6fd2807SJeff Garzik "(%s, err_mask=0x%x)\n", reason, err_mask); 1772c6fd2807SJeff Garzik return rc; 1773c6fd2807SJeff Garzik } 1774c6fd2807SJeff Garzik 1775c6fd2807SJeff Garzik static inline u8 ata_dev_knobble(struct ata_device *dev) 1776c6fd2807SJeff Garzik { 1777c6fd2807SJeff Garzik return ((dev->ap->cbl == ATA_CBL_SATA) && (!ata_id_is_sata(dev->id))); 1778c6fd2807SJeff Garzik } 1779c6fd2807SJeff Garzik 1780c6fd2807SJeff Garzik static void ata_dev_config_ncq(struct ata_device *dev, 1781c6fd2807SJeff Garzik char *desc, size_t desc_sz) 1782c6fd2807SJeff Garzik { 1783c6fd2807SJeff Garzik struct ata_port *ap = dev->ap; 1784c6fd2807SJeff Garzik int hdepth = 0, ddepth = ata_id_queue_depth(dev->id); 1785c6fd2807SJeff Garzik 1786c6fd2807SJeff Garzik if (!ata_id_has_ncq(dev->id)) { 1787c6fd2807SJeff Garzik desc[0] = '\0'; 1788c6fd2807SJeff Garzik return; 1789c6fd2807SJeff Garzik } 179075683fe7STejun Heo if (dev->horkage & ATA_HORKAGE_NONCQ) { 17916919a0a6SAlan Cox snprintf(desc, desc_sz, "NCQ (not used)"); 17926919a0a6SAlan Cox return; 17936919a0a6SAlan Cox } 1794c6fd2807SJeff Garzik if (ap->flags & ATA_FLAG_NCQ) { 1795cca3974eSJeff Garzik hdepth = min(ap->scsi_host->can_queue, ATA_MAX_QUEUE - 1); 1796c6fd2807SJeff Garzik dev->flags |= ATA_DFLAG_NCQ; 1797c6fd2807SJeff Garzik } 1798c6fd2807SJeff Garzik 1799c6fd2807SJeff Garzik if (hdepth >= ddepth) 1800c6fd2807SJeff Garzik snprintf(desc, desc_sz, "NCQ (depth %d)", ddepth); 1801c6fd2807SJeff Garzik else 1802c6fd2807SJeff Garzik snprintf(desc, desc_sz, "NCQ (depth %d/%d)", hdepth, ddepth); 1803c6fd2807SJeff Garzik } 1804c6fd2807SJeff Garzik 1805c6fd2807SJeff Garzik /** 1806c6fd2807SJeff Garzik * ata_dev_configure - Configure the specified ATA/ATAPI device 1807c6fd2807SJeff Garzik * @dev: Target device to configure 1808c6fd2807SJeff Garzik * 1809c6fd2807SJeff Garzik * Configure @dev according to @dev->id. Generic and low-level 1810c6fd2807SJeff Garzik * driver specific fixups are also applied. 1811c6fd2807SJeff Garzik * 1812c6fd2807SJeff Garzik * LOCKING: 1813c6fd2807SJeff Garzik * Kernel thread context (may sleep) 1814c6fd2807SJeff Garzik * 1815c6fd2807SJeff Garzik * RETURNS: 1816c6fd2807SJeff Garzik * 0 on success, -errno otherwise 1817c6fd2807SJeff Garzik */ 1818efdaedc4STejun Heo int ata_dev_configure(struct ata_device *dev) 1819c6fd2807SJeff Garzik { 1820c6fd2807SJeff Garzik struct ata_port *ap = dev->ap; 18216746544cSTejun Heo struct ata_eh_context *ehc = &ap->eh_context; 18226746544cSTejun Heo int print_info = ehc->i.flags & ATA_EHI_PRINTINFO; 1823c6fd2807SJeff Garzik const u16 *id = dev->id; 1824c6fd2807SJeff Garzik unsigned int xfer_mask; 1825b352e57dSAlan Cox char revbuf[7]; /* XYZ-99\0 */ 18263f64f565SEric D. Mudama char fwrevbuf[ATA_ID_FW_REV_LEN+1]; 18273f64f565SEric D. Mudama char modelbuf[ATA_ID_PROD_LEN+1]; 1828c6fd2807SJeff Garzik int rc; 1829c6fd2807SJeff Garzik 1830c6fd2807SJeff Garzik if (!ata_dev_enabled(dev) && ata_msg_info(ap)) { 183144877b4eSTejun Heo ata_dev_printk(dev, KERN_INFO, "%s: ENTER/EXIT -- nodev\n", 183244877b4eSTejun Heo __FUNCTION__); 1833c6fd2807SJeff Garzik return 0; 1834c6fd2807SJeff Garzik } 1835c6fd2807SJeff Garzik 1836c6fd2807SJeff Garzik if (ata_msg_probe(ap)) 183744877b4eSTejun Heo ata_dev_printk(dev, KERN_DEBUG, "%s: ENTER\n", __FUNCTION__); 1838c6fd2807SJeff Garzik 183975683fe7STejun Heo /* set horkage */ 184075683fe7STejun Heo dev->horkage |= ata_dev_blacklisted(dev); 184175683fe7STejun Heo 18426746544cSTejun Heo /* let ACPI work its magic */ 18436746544cSTejun Heo rc = ata_acpi_on_devcfg(dev); 18446746544cSTejun Heo if (rc) 18456746544cSTejun Heo return rc; 184608573a86SKristen Carlson Accardi 1847c6fd2807SJeff Garzik /* print device capabilities */ 1848c6fd2807SJeff Garzik if (ata_msg_probe(ap)) 1849c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_DEBUG, 1850c6fd2807SJeff Garzik "%s: cfg 49:%04x 82:%04x 83:%04x 84:%04x " 1851c6fd2807SJeff Garzik "85:%04x 86:%04x 87:%04x 88:%04x\n", 1852c6fd2807SJeff Garzik __FUNCTION__, 1853c6fd2807SJeff Garzik id[49], id[82], id[83], id[84], 1854c6fd2807SJeff Garzik id[85], id[86], id[87], id[88]); 1855c6fd2807SJeff Garzik 1856c6fd2807SJeff Garzik /* initialize to-be-configured parameters */ 1857c6fd2807SJeff Garzik dev->flags &= ~ATA_DFLAG_CFG_MASK; 1858c6fd2807SJeff Garzik dev->max_sectors = 0; 1859c6fd2807SJeff Garzik dev->cdb_len = 0; 1860c6fd2807SJeff Garzik dev->n_sectors = 0; 1861c6fd2807SJeff Garzik dev->cylinders = 0; 1862c6fd2807SJeff Garzik dev->heads = 0; 1863c6fd2807SJeff Garzik dev->sectors = 0; 1864c6fd2807SJeff Garzik 1865c6fd2807SJeff Garzik /* 1866c6fd2807SJeff Garzik * common ATA, ATAPI feature tests 1867c6fd2807SJeff Garzik */ 1868c6fd2807SJeff Garzik 1869c6fd2807SJeff Garzik /* find max transfer mode; for printk only */ 1870c6fd2807SJeff Garzik xfer_mask = ata_id_xfermask(id); 1871c6fd2807SJeff Garzik 1872c6fd2807SJeff Garzik if (ata_msg_probe(ap)) 1873c6fd2807SJeff Garzik ata_dump_id(id); 1874c6fd2807SJeff Garzik 1875ef143d57SAlbert Lee /* SCSI only uses 4-char revisions, dump full 8 chars from ATA */ 1876ef143d57SAlbert Lee ata_id_c_string(dev->id, fwrevbuf, ATA_ID_FW_REV, 1877ef143d57SAlbert Lee sizeof(fwrevbuf)); 1878ef143d57SAlbert Lee 1879ef143d57SAlbert Lee ata_id_c_string(dev->id, modelbuf, ATA_ID_PROD, 1880ef143d57SAlbert Lee sizeof(modelbuf)); 1881ef143d57SAlbert Lee 1882c6fd2807SJeff Garzik /* ATA-specific feature tests */ 1883c6fd2807SJeff Garzik if (dev->class == ATA_DEV_ATA) { 1884b352e57dSAlan Cox if (ata_id_is_cfa(id)) { 1885b352e57dSAlan Cox if (id[162] & 1) /* CPRM may make this media unusable */ 188644877b4eSTejun Heo ata_dev_printk(dev, KERN_WARNING, 188744877b4eSTejun Heo "supports DRM functions and may " 188844877b4eSTejun Heo "not be fully accessable.\n"); 1889b352e57dSAlan Cox snprintf(revbuf, 7, "CFA"); 1890b352e57dSAlan Cox } 1891b352e57dSAlan Cox else 1892b352e57dSAlan Cox snprintf(revbuf, 7, "ATA-%d", ata_id_major_version(id)); 1893b352e57dSAlan Cox 1894c6fd2807SJeff Garzik dev->n_sectors = ata_id_n_sectors(id); 1895c6fd2807SJeff Garzik 18963f64f565SEric D. Mudama if (dev->id[59] & 0x100) 18973f64f565SEric D. Mudama dev->multi_count = dev->id[59] & 0xff; 18983f64f565SEric D. Mudama 1899c6fd2807SJeff Garzik if (ata_id_has_lba(id)) { 1900c6fd2807SJeff Garzik const char *lba_desc; 1901c6fd2807SJeff Garzik char ncq_desc[20]; 1902c6fd2807SJeff Garzik 1903c6fd2807SJeff Garzik lba_desc = "LBA"; 1904c6fd2807SJeff Garzik dev->flags |= ATA_DFLAG_LBA; 1905c6fd2807SJeff Garzik if (ata_id_has_lba48(id)) { 1906c6fd2807SJeff Garzik dev->flags |= ATA_DFLAG_LBA48; 1907c6fd2807SJeff Garzik lba_desc = "LBA48"; 19086fc49adbSTejun Heo 19096fc49adbSTejun Heo if (dev->n_sectors >= (1UL << 28) && 19106fc49adbSTejun Heo ata_id_has_flush_ext(id)) 19116fc49adbSTejun Heo dev->flags |= ATA_DFLAG_FLUSH_EXT; 1912c6fd2807SJeff Garzik } 1913c6fd2807SJeff Garzik 19141e999736SAlan Cox if (ata_id_hpa_enabled(dev->id)) 19151e999736SAlan Cox dev->n_sectors = ata_hpa_resize(dev); 19161e999736SAlan Cox 1917c6fd2807SJeff Garzik /* config NCQ */ 1918c6fd2807SJeff Garzik ata_dev_config_ncq(dev, ncq_desc, sizeof(ncq_desc)); 1919c6fd2807SJeff Garzik 1920c6fd2807SJeff Garzik /* print device info to dmesg */ 19213f64f565SEric D. Mudama if (ata_msg_drv(ap) && print_info) { 19223f64f565SEric D. Mudama ata_dev_printk(dev, KERN_INFO, 19233f64f565SEric D. Mudama "%s: %s, %s, max %s\n", 19243f64f565SEric D. Mudama revbuf, modelbuf, fwrevbuf, 19253f64f565SEric D. Mudama ata_mode_string(xfer_mask)); 19263f64f565SEric D. Mudama ata_dev_printk(dev, KERN_INFO, 19273f64f565SEric D. Mudama "%Lu sectors, multi %u: %s %s\n", 1928c6fd2807SJeff Garzik (unsigned long long)dev->n_sectors, 19293f64f565SEric D. Mudama dev->multi_count, lba_desc, ncq_desc); 19303f64f565SEric D. Mudama } 1931c6fd2807SJeff Garzik } else { 1932c6fd2807SJeff Garzik /* CHS */ 1933c6fd2807SJeff Garzik 1934c6fd2807SJeff Garzik /* Default translation */ 1935c6fd2807SJeff Garzik dev->cylinders = id[1]; 1936c6fd2807SJeff Garzik dev->heads = id[3]; 1937c6fd2807SJeff Garzik dev->sectors = id[6]; 1938c6fd2807SJeff Garzik 1939c6fd2807SJeff Garzik if (ata_id_current_chs_valid(id)) { 1940c6fd2807SJeff Garzik /* Current CHS translation is valid. */ 1941c6fd2807SJeff Garzik dev->cylinders = id[54]; 1942c6fd2807SJeff Garzik dev->heads = id[55]; 1943c6fd2807SJeff Garzik dev->sectors = id[56]; 1944c6fd2807SJeff Garzik } 1945c6fd2807SJeff Garzik 1946c6fd2807SJeff Garzik /* print device info to dmesg */ 19473f64f565SEric D. Mudama if (ata_msg_drv(ap) && print_info) { 1948c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_INFO, 19493f64f565SEric D. Mudama "%s: %s, %s, max %s\n", 19503f64f565SEric D. Mudama revbuf, modelbuf, fwrevbuf, 19513f64f565SEric D. Mudama ata_mode_string(xfer_mask)); 19523f64f565SEric D. Mudama ata_dev_printk(dev, KERN_INFO, 19533f64f565SEric D. Mudama "%Lu sectors, multi %u, CHS %u/%u/%u\n", 19543f64f565SEric D. Mudama (unsigned long long)dev->n_sectors, 19553f64f565SEric D. Mudama dev->multi_count, dev->cylinders, 19563f64f565SEric D. Mudama dev->heads, dev->sectors); 19573f64f565SEric D. Mudama } 1958c6fd2807SJeff Garzik } 1959c6fd2807SJeff Garzik 1960c6fd2807SJeff Garzik dev->cdb_len = 16; 1961c6fd2807SJeff Garzik } 1962c6fd2807SJeff Garzik 1963c6fd2807SJeff Garzik /* ATAPI-specific feature tests */ 1964c6fd2807SJeff Garzik else if (dev->class == ATA_DEV_ATAPI) { 1965c6fd2807SJeff Garzik char *cdb_intr_string = ""; 1966c6fd2807SJeff Garzik 1967c6fd2807SJeff Garzik rc = atapi_cdb_len(id); 1968c6fd2807SJeff Garzik if ((rc < 12) || (rc > ATAPI_CDB_LEN)) { 1969c6fd2807SJeff Garzik if (ata_msg_warn(ap)) 1970c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_WARNING, 1971c6fd2807SJeff Garzik "unsupported CDB len\n"); 1972c6fd2807SJeff Garzik rc = -EINVAL; 1973c6fd2807SJeff Garzik goto err_out_nosup; 1974c6fd2807SJeff Garzik } 1975c6fd2807SJeff Garzik dev->cdb_len = (unsigned int) rc; 1976c6fd2807SJeff Garzik 1977c6fd2807SJeff Garzik if (ata_id_cdb_intr(dev->id)) { 1978c6fd2807SJeff Garzik dev->flags |= ATA_DFLAG_CDB_INTR; 1979c6fd2807SJeff Garzik cdb_intr_string = ", CDB intr"; 1980c6fd2807SJeff Garzik } 1981c6fd2807SJeff Garzik 1982c6fd2807SJeff Garzik /* print device info to dmesg */ 1983c6fd2807SJeff Garzik if (ata_msg_drv(ap) && print_info) 1984ef143d57SAlbert Lee ata_dev_printk(dev, KERN_INFO, 1985ef143d57SAlbert Lee "ATAPI: %s, %s, max %s%s\n", 1986ef143d57SAlbert Lee modelbuf, fwrevbuf, 1987c6fd2807SJeff Garzik ata_mode_string(xfer_mask), 1988c6fd2807SJeff Garzik cdb_intr_string); 1989c6fd2807SJeff Garzik } 1990c6fd2807SJeff Garzik 1991914ed354STejun Heo /* determine max_sectors */ 1992914ed354STejun Heo dev->max_sectors = ATA_MAX_SECTORS; 1993914ed354STejun Heo if (dev->flags & ATA_DFLAG_LBA48) 1994914ed354STejun Heo dev->max_sectors = ATA_MAX_SECTORS_LBA48; 1995914ed354STejun Heo 199693590859SAlan Cox if (dev->horkage & ATA_HORKAGE_DIAGNOSTIC) { 199793590859SAlan Cox /* Let the user know. We don't want to disallow opens for 199893590859SAlan Cox rescue purposes, or in case the vendor is just a blithering 199993590859SAlan Cox idiot */ 200093590859SAlan Cox if (print_info) { 200193590859SAlan Cox ata_dev_printk(dev, KERN_WARNING, 200293590859SAlan Cox "Drive reports diagnostics failure. This may indicate a drive\n"); 200393590859SAlan Cox ata_dev_printk(dev, KERN_WARNING, 200493590859SAlan Cox "fault or invalid emulation. Contact drive vendor for information.\n"); 200593590859SAlan Cox } 200693590859SAlan Cox } 200793590859SAlan Cox 2008c6fd2807SJeff Garzik /* limit bridge transfers to udma5, 200 sectors */ 2009c6fd2807SJeff Garzik if (ata_dev_knobble(dev)) { 2010c6fd2807SJeff Garzik if (ata_msg_drv(ap) && print_info) 2011c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_INFO, 2012c6fd2807SJeff Garzik "applying bridge limits\n"); 2013c6fd2807SJeff Garzik dev->udma_mask &= ATA_UDMA5; 2014c6fd2807SJeff Garzik dev->max_sectors = ATA_MAX_SECTORS; 2015c6fd2807SJeff Garzik } 2016c6fd2807SJeff Garzik 201775683fe7STejun Heo if (dev->horkage & ATA_HORKAGE_MAX_SEC_128) 201803ec52deSTejun Heo dev->max_sectors = min_t(unsigned int, ATA_MAX_SECTORS_128, 201903ec52deSTejun Heo dev->max_sectors); 202018d6e9d5SAlbert Lee 2021c6fd2807SJeff Garzik if (ap->ops->dev_config) 2022cd0d3bbcSAlan ap->ops->dev_config(dev); 2023c6fd2807SJeff Garzik 2024c6fd2807SJeff Garzik if (ata_msg_probe(ap)) 2025c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_DEBUG, "%s: EXIT, drv_stat = 0x%x\n", 2026c6fd2807SJeff Garzik __FUNCTION__, ata_chk_status(ap)); 2027c6fd2807SJeff Garzik return 0; 2028c6fd2807SJeff Garzik 2029c6fd2807SJeff Garzik err_out_nosup: 2030c6fd2807SJeff Garzik if (ata_msg_probe(ap)) 2031c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_DEBUG, 2032c6fd2807SJeff Garzik "%s: EXIT, err\n", __FUNCTION__); 2033c6fd2807SJeff Garzik return rc; 2034c6fd2807SJeff Garzik } 2035c6fd2807SJeff Garzik 2036c6fd2807SJeff Garzik /** 20372e41e8e6SAlan Cox * ata_cable_40wire - return 40 wire cable type 2038be0d18dfSAlan Cox * @ap: port 2039be0d18dfSAlan Cox * 20402e41e8e6SAlan Cox * Helper method for drivers which want to hardwire 40 wire cable 2041be0d18dfSAlan Cox * detection. 2042be0d18dfSAlan Cox */ 2043be0d18dfSAlan Cox 2044be0d18dfSAlan Cox int ata_cable_40wire(struct ata_port *ap) 2045be0d18dfSAlan Cox { 2046be0d18dfSAlan Cox return ATA_CBL_PATA40; 2047be0d18dfSAlan Cox } 2048be0d18dfSAlan Cox 2049be0d18dfSAlan Cox /** 20502e41e8e6SAlan Cox * ata_cable_80wire - return 80 wire cable type 2051be0d18dfSAlan Cox * @ap: port 2052be0d18dfSAlan Cox * 20532e41e8e6SAlan Cox * Helper method for drivers which want to hardwire 80 wire cable 2054be0d18dfSAlan Cox * detection. 2055be0d18dfSAlan Cox */ 2056be0d18dfSAlan Cox 2057be0d18dfSAlan Cox int ata_cable_80wire(struct ata_port *ap) 2058be0d18dfSAlan Cox { 2059be0d18dfSAlan Cox return ATA_CBL_PATA80; 2060be0d18dfSAlan Cox } 2061be0d18dfSAlan Cox 2062be0d18dfSAlan Cox /** 2063be0d18dfSAlan Cox * ata_cable_unknown - return unknown PATA cable. 2064be0d18dfSAlan Cox * @ap: port 2065be0d18dfSAlan Cox * 2066be0d18dfSAlan Cox * Helper method for drivers which have no PATA cable detection. 2067be0d18dfSAlan Cox */ 2068be0d18dfSAlan Cox 2069be0d18dfSAlan Cox int ata_cable_unknown(struct ata_port *ap) 2070be0d18dfSAlan Cox { 2071be0d18dfSAlan Cox return ATA_CBL_PATA_UNK; 2072be0d18dfSAlan Cox } 2073be0d18dfSAlan Cox 2074be0d18dfSAlan Cox /** 2075be0d18dfSAlan Cox * ata_cable_sata - return SATA cable type 2076be0d18dfSAlan Cox * @ap: port 2077be0d18dfSAlan Cox * 2078be0d18dfSAlan Cox * Helper method for drivers which have SATA cables 2079be0d18dfSAlan Cox */ 2080be0d18dfSAlan Cox 2081be0d18dfSAlan Cox int ata_cable_sata(struct ata_port *ap) 2082be0d18dfSAlan Cox { 2083be0d18dfSAlan Cox return ATA_CBL_SATA; 2084be0d18dfSAlan Cox } 2085be0d18dfSAlan Cox 2086be0d18dfSAlan Cox /** 2087c6fd2807SJeff Garzik * ata_bus_probe - Reset and probe ATA bus 2088c6fd2807SJeff Garzik * @ap: Bus to probe 2089c6fd2807SJeff Garzik * 2090c6fd2807SJeff Garzik * Master ATA bus probing function. Initiates a hardware-dependent 2091c6fd2807SJeff Garzik * bus reset, then attempts to identify any devices found on 2092c6fd2807SJeff Garzik * the bus. 2093c6fd2807SJeff Garzik * 2094c6fd2807SJeff Garzik * LOCKING: 2095c6fd2807SJeff Garzik * PCI/etc. bus probe sem. 2096c6fd2807SJeff Garzik * 2097c6fd2807SJeff Garzik * RETURNS: 2098c6fd2807SJeff Garzik * Zero on success, negative errno otherwise. 2099c6fd2807SJeff Garzik */ 2100c6fd2807SJeff Garzik 2101c6fd2807SJeff Garzik int ata_bus_probe(struct ata_port *ap) 2102c6fd2807SJeff Garzik { 2103c6fd2807SJeff Garzik unsigned int classes[ATA_MAX_DEVICES]; 2104c6fd2807SJeff Garzik int tries[ATA_MAX_DEVICES]; 21054ae72a1eSTejun Heo int i, rc; 2106c6fd2807SJeff Garzik struct ata_device *dev; 2107c6fd2807SJeff Garzik 2108c6fd2807SJeff Garzik ata_port_probe(ap); 2109c6fd2807SJeff Garzik 2110c6fd2807SJeff Garzik for (i = 0; i < ATA_MAX_DEVICES; i++) 2111c6fd2807SJeff Garzik tries[i] = ATA_PROBE_MAX_TRIES; 2112c6fd2807SJeff Garzik 2113c6fd2807SJeff Garzik retry: 2114c6fd2807SJeff Garzik /* reset and determine device classes */ 2115c6fd2807SJeff Garzik ap->ops->phy_reset(ap); 2116c6fd2807SJeff Garzik 2117c6fd2807SJeff Garzik for (i = 0; i < ATA_MAX_DEVICES; i++) { 2118c6fd2807SJeff Garzik dev = &ap->device[i]; 2119c6fd2807SJeff Garzik 2120c6fd2807SJeff Garzik if (!(ap->flags & ATA_FLAG_DISABLED) && 2121c6fd2807SJeff Garzik dev->class != ATA_DEV_UNKNOWN) 2122c6fd2807SJeff Garzik classes[dev->devno] = dev->class; 2123c6fd2807SJeff Garzik else 2124c6fd2807SJeff Garzik classes[dev->devno] = ATA_DEV_NONE; 2125c6fd2807SJeff Garzik 2126c6fd2807SJeff Garzik dev->class = ATA_DEV_UNKNOWN; 2127c6fd2807SJeff Garzik } 2128c6fd2807SJeff Garzik 2129c6fd2807SJeff Garzik ata_port_probe(ap); 2130c6fd2807SJeff Garzik 2131c6fd2807SJeff Garzik /* after the reset the device state is PIO 0 and the controller 2132c6fd2807SJeff Garzik state is undefined. Record the mode */ 2133c6fd2807SJeff Garzik 2134c6fd2807SJeff Garzik for (i = 0; i < ATA_MAX_DEVICES; i++) 2135c6fd2807SJeff Garzik ap->device[i].pio_mode = XFER_PIO_0; 2136c6fd2807SJeff Garzik 2137f31f0cc2SJeff Garzik /* read IDENTIFY page and configure devices. We have to do the identify 2138f31f0cc2SJeff Garzik specific sequence bass-ackwards so that PDIAG- is released by 2139f31f0cc2SJeff Garzik the slave device */ 2140f31f0cc2SJeff Garzik 2141f31f0cc2SJeff Garzik for (i = ATA_MAX_DEVICES - 1; i >= 0; i--) { 2142c6fd2807SJeff Garzik dev = &ap->device[i]; 2143c6fd2807SJeff Garzik 2144c6fd2807SJeff Garzik if (tries[i]) 2145c6fd2807SJeff Garzik dev->class = classes[i]; 2146c6fd2807SJeff Garzik 2147c6fd2807SJeff Garzik if (!ata_dev_enabled(dev)) 2148c6fd2807SJeff Garzik continue; 2149c6fd2807SJeff Garzik 2150bff04647STejun Heo rc = ata_dev_read_id(dev, &dev->class, ATA_READID_POSTRESET, 2151bff04647STejun Heo dev->id); 2152c6fd2807SJeff Garzik if (rc) 2153c6fd2807SJeff Garzik goto fail; 2154f31f0cc2SJeff Garzik } 2155f31f0cc2SJeff Garzik 2156be0d18dfSAlan Cox /* Now ask for the cable type as PDIAG- should have been released */ 2157be0d18dfSAlan Cox if (ap->ops->cable_detect) 2158be0d18dfSAlan Cox ap->cbl = ap->ops->cable_detect(ap); 2159be0d18dfSAlan Cox 2160f31f0cc2SJeff Garzik /* After the identify sequence we can now set up the devices. We do 2161f31f0cc2SJeff Garzik this in the normal order so that the user doesn't get confused */ 2162f31f0cc2SJeff Garzik 2163f31f0cc2SJeff Garzik for(i = 0; i < ATA_MAX_DEVICES; i++) { 2164f31f0cc2SJeff Garzik dev = &ap->device[i]; 2165f31f0cc2SJeff Garzik if (!ata_dev_enabled(dev)) 2166f31f0cc2SJeff Garzik continue; 2167c6fd2807SJeff Garzik 2168efdaedc4STejun Heo ap->eh_context.i.flags |= ATA_EHI_PRINTINFO; 2169efdaedc4STejun Heo rc = ata_dev_configure(dev); 2170efdaedc4STejun Heo ap->eh_context.i.flags &= ~ATA_EHI_PRINTINFO; 2171c6fd2807SJeff Garzik if (rc) 2172c6fd2807SJeff Garzik goto fail; 2173c6fd2807SJeff Garzik } 2174c6fd2807SJeff Garzik 2175c6fd2807SJeff Garzik /* configure transfer mode */ 2176c6fd2807SJeff Garzik rc = ata_set_mode(ap, &dev); 21774ae72a1eSTejun Heo if (rc) 2178c6fd2807SJeff Garzik goto fail; 2179c6fd2807SJeff Garzik 2180c6fd2807SJeff Garzik for (i = 0; i < ATA_MAX_DEVICES; i++) 2181c6fd2807SJeff Garzik if (ata_dev_enabled(&ap->device[i])) 2182c6fd2807SJeff Garzik return 0; 2183c6fd2807SJeff Garzik 2184c6fd2807SJeff Garzik /* no device present, disable port */ 2185c6fd2807SJeff Garzik ata_port_disable(ap); 2186c6fd2807SJeff Garzik ap->ops->port_disable(ap); 2187c6fd2807SJeff Garzik return -ENODEV; 2188c6fd2807SJeff Garzik 2189c6fd2807SJeff Garzik fail: 21904ae72a1eSTejun Heo tries[dev->devno]--; 21914ae72a1eSTejun Heo 2192c6fd2807SJeff Garzik switch (rc) { 2193c6fd2807SJeff Garzik case -EINVAL: 21944ae72a1eSTejun Heo /* eeek, something went very wrong, give up */ 2195c6fd2807SJeff Garzik tries[dev->devno] = 0; 2196c6fd2807SJeff Garzik break; 21974ae72a1eSTejun Heo 21984ae72a1eSTejun Heo case -ENODEV: 21994ae72a1eSTejun Heo /* give it just one more chance */ 22004ae72a1eSTejun Heo tries[dev->devno] = min(tries[dev->devno], 1); 2201c6fd2807SJeff Garzik case -EIO: 22024ae72a1eSTejun Heo if (tries[dev->devno] == 1) { 22034ae72a1eSTejun Heo /* This is the last chance, better to slow 22044ae72a1eSTejun Heo * down than lose it. 22054ae72a1eSTejun Heo */ 2206c6fd2807SJeff Garzik sata_down_spd_limit(ap); 22074ae72a1eSTejun Heo ata_down_xfermask_limit(dev, ATA_DNXFER_PIO); 22084ae72a1eSTejun Heo } 2209c6fd2807SJeff Garzik } 2210c6fd2807SJeff Garzik 22114ae72a1eSTejun Heo if (!tries[dev->devno]) 2212c6fd2807SJeff Garzik ata_dev_disable(dev); 2213c6fd2807SJeff Garzik 2214c6fd2807SJeff Garzik goto retry; 2215c6fd2807SJeff Garzik } 2216c6fd2807SJeff Garzik 2217c6fd2807SJeff Garzik /** 2218c6fd2807SJeff Garzik * ata_port_probe - Mark port as enabled 2219c6fd2807SJeff Garzik * @ap: Port for which we indicate enablement 2220c6fd2807SJeff Garzik * 2221c6fd2807SJeff Garzik * Modify @ap data structure such that the system 2222c6fd2807SJeff Garzik * thinks that the entire port is enabled. 2223c6fd2807SJeff Garzik * 2224cca3974eSJeff Garzik * LOCKING: host lock, or some other form of 2225c6fd2807SJeff Garzik * serialization. 2226c6fd2807SJeff Garzik */ 2227c6fd2807SJeff Garzik 2228c6fd2807SJeff Garzik void ata_port_probe(struct ata_port *ap) 2229c6fd2807SJeff Garzik { 2230c6fd2807SJeff Garzik ap->flags &= ~ATA_FLAG_DISABLED; 2231c6fd2807SJeff Garzik } 2232c6fd2807SJeff Garzik 2233c6fd2807SJeff Garzik /** 2234c6fd2807SJeff Garzik * sata_print_link_status - Print SATA link status 2235c6fd2807SJeff Garzik * @ap: SATA port to printk link status about 2236c6fd2807SJeff Garzik * 2237c6fd2807SJeff Garzik * This function prints link speed and status of a SATA link. 2238c6fd2807SJeff Garzik * 2239c6fd2807SJeff Garzik * LOCKING: 2240c6fd2807SJeff Garzik * None. 2241c6fd2807SJeff Garzik */ 224243727fbcSJeff Garzik void sata_print_link_status(struct ata_port *ap) 2243c6fd2807SJeff Garzik { 2244c6fd2807SJeff Garzik u32 sstatus, scontrol, tmp; 2245c6fd2807SJeff Garzik 2246c6fd2807SJeff Garzik if (sata_scr_read(ap, SCR_STATUS, &sstatus)) 2247c6fd2807SJeff Garzik return; 2248c6fd2807SJeff Garzik sata_scr_read(ap, SCR_CONTROL, &scontrol); 2249c6fd2807SJeff Garzik 2250c6fd2807SJeff Garzik if (ata_port_online(ap)) { 2251c6fd2807SJeff Garzik tmp = (sstatus >> 4) & 0xf; 2252c6fd2807SJeff Garzik ata_port_printk(ap, KERN_INFO, 2253c6fd2807SJeff Garzik "SATA link up %s (SStatus %X SControl %X)\n", 2254c6fd2807SJeff Garzik sata_spd_string(tmp), sstatus, scontrol); 2255c6fd2807SJeff Garzik } else { 2256c6fd2807SJeff Garzik ata_port_printk(ap, KERN_INFO, 2257c6fd2807SJeff Garzik "SATA link down (SStatus %X SControl %X)\n", 2258c6fd2807SJeff Garzik sstatus, scontrol); 2259c6fd2807SJeff Garzik } 2260c6fd2807SJeff Garzik } 2261c6fd2807SJeff Garzik 2262c6fd2807SJeff Garzik /** 2263c6fd2807SJeff Garzik * __sata_phy_reset - Wake/reset a low-level SATA PHY 2264c6fd2807SJeff Garzik * @ap: SATA port associated with target SATA PHY. 2265c6fd2807SJeff Garzik * 2266c6fd2807SJeff Garzik * This function issues commands to standard SATA Sxxx 2267c6fd2807SJeff Garzik * PHY registers, to wake up the phy (and device), and 2268c6fd2807SJeff Garzik * clear any reset condition. 2269c6fd2807SJeff Garzik * 2270c6fd2807SJeff Garzik * LOCKING: 2271c6fd2807SJeff Garzik * PCI/etc. bus probe sem. 2272c6fd2807SJeff Garzik * 2273c6fd2807SJeff Garzik */ 2274c6fd2807SJeff Garzik void __sata_phy_reset(struct ata_port *ap) 2275c6fd2807SJeff Garzik { 2276c6fd2807SJeff Garzik u32 sstatus; 2277c6fd2807SJeff Garzik unsigned long timeout = jiffies + (HZ * 5); 2278c6fd2807SJeff Garzik 2279c6fd2807SJeff Garzik if (ap->flags & ATA_FLAG_SATA_RESET) { 2280c6fd2807SJeff Garzik /* issue phy wake/reset */ 2281c6fd2807SJeff Garzik sata_scr_write_flush(ap, SCR_CONTROL, 0x301); 2282c6fd2807SJeff Garzik /* Couldn't find anything in SATA I/II specs, but 2283c6fd2807SJeff Garzik * AHCI-1.1 10.4.2 says at least 1 ms. */ 2284c6fd2807SJeff Garzik mdelay(1); 2285c6fd2807SJeff Garzik } 2286c6fd2807SJeff Garzik /* phy wake/clear reset */ 2287c6fd2807SJeff Garzik sata_scr_write_flush(ap, SCR_CONTROL, 0x300); 2288c6fd2807SJeff Garzik 2289c6fd2807SJeff Garzik /* wait for phy to become ready, if necessary */ 2290c6fd2807SJeff Garzik do { 2291c6fd2807SJeff Garzik msleep(200); 2292c6fd2807SJeff Garzik sata_scr_read(ap, SCR_STATUS, &sstatus); 2293c6fd2807SJeff Garzik if ((sstatus & 0xf) != 1) 2294c6fd2807SJeff Garzik break; 2295c6fd2807SJeff Garzik } while (time_before(jiffies, timeout)); 2296c6fd2807SJeff Garzik 2297c6fd2807SJeff Garzik /* print link status */ 2298c6fd2807SJeff Garzik sata_print_link_status(ap); 2299c6fd2807SJeff Garzik 2300c6fd2807SJeff Garzik /* TODO: phy layer with polling, timeouts, etc. */ 2301c6fd2807SJeff Garzik if (!ata_port_offline(ap)) 2302c6fd2807SJeff Garzik ata_port_probe(ap); 2303c6fd2807SJeff Garzik else 2304c6fd2807SJeff Garzik ata_port_disable(ap); 2305c6fd2807SJeff Garzik 2306c6fd2807SJeff Garzik if (ap->flags & ATA_FLAG_DISABLED) 2307c6fd2807SJeff Garzik return; 2308c6fd2807SJeff Garzik 2309c6fd2807SJeff Garzik if (ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT)) { 2310c6fd2807SJeff Garzik ata_port_disable(ap); 2311c6fd2807SJeff Garzik return; 2312c6fd2807SJeff Garzik } 2313c6fd2807SJeff Garzik 2314c6fd2807SJeff Garzik ap->cbl = ATA_CBL_SATA; 2315c6fd2807SJeff Garzik } 2316c6fd2807SJeff Garzik 2317c6fd2807SJeff Garzik /** 2318c6fd2807SJeff Garzik * sata_phy_reset - Reset SATA bus. 2319c6fd2807SJeff Garzik * @ap: SATA port associated with target SATA PHY. 2320c6fd2807SJeff Garzik * 2321c6fd2807SJeff Garzik * This function resets the SATA bus, and then probes 2322c6fd2807SJeff Garzik * the bus for devices. 2323c6fd2807SJeff Garzik * 2324c6fd2807SJeff Garzik * LOCKING: 2325c6fd2807SJeff Garzik * PCI/etc. bus probe sem. 2326c6fd2807SJeff Garzik * 2327c6fd2807SJeff Garzik */ 2328c6fd2807SJeff Garzik void sata_phy_reset(struct ata_port *ap) 2329c6fd2807SJeff Garzik { 2330c6fd2807SJeff Garzik __sata_phy_reset(ap); 2331c6fd2807SJeff Garzik if (ap->flags & ATA_FLAG_DISABLED) 2332c6fd2807SJeff Garzik return; 2333c6fd2807SJeff Garzik ata_bus_reset(ap); 2334c6fd2807SJeff Garzik } 2335c6fd2807SJeff Garzik 2336c6fd2807SJeff Garzik /** 2337c6fd2807SJeff Garzik * ata_dev_pair - return other device on cable 2338c6fd2807SJeff Garzik * @adev: device 2339c6fd2807SJeff Garzik * 2340c6fd2807SJeff Garzik * Obtain the other device on the same cable, or if none is 2341c6fd2807SJeff Garzik * present NULL is returned 2342c6fd2807SJeff Garzik */ 2343c6fd2807SJeff Garzik 2344c6fd2807SJeff Garzik struct ata_device *ata_dev_pair(struct ata_device *adev) 2345c6fd2807SJeff Garzik { 2346c6fd2807SJeff Garzik struct ata_port *ap = adev->ap; 2347c6fd2807SJeff Garzik struct ata_device *pair = &ap->device[1 - adev->devno]; 2348c6fd2807SJeff Garzik if (!ata_dev_enabled(pair)) 2349c6fd2807SJeff Garzik return NULL; 2350c6fd2807SJeff Garzik return pair; 2351c6fd2807SJeff Garzik } 2352c6fd2807SJeff Garzik 2353c6fd2807SJeff Garzik /** 2354c6fd2807SJeff Garzik * ata_port_disable - Disable port. 2355c6fd2807SJeff Garzik * @ap: Port to be disabled. 2356c6fd2807SJeff Garzik * 2357c6fd2807SJeff Garzik * Modify @ap data structure such that the system 2358c6fd2807SJeff Garzik * thinks that the entire port is disabled, and should 2359c6fd2807SJeff Garzik * never attempt to probe or communicate with devices 2360c6fd2807SJeff Garzik * on this port. 2361c6fd2807SJeff Garzik * 2362cca3974eSJeff Garzik * LOCKING: host lock, or some other form of 2363c6fd2807SJeff Garzik * serialization. 2364c6fd2807SJeff Garzik */ 2365c6fd2807SJeff Garzik 2366c6fd2807SJeff Garzik void ata_port_disable(struct ata_port *ap) 2367c6fd2807SJeff Garzik { 2368c6fd2807SJeff Garzik ap->device[0].class = ATA_DEV_NONE; 2369c6fd2807SJeff Garzik ap->device[1].class = ATA_DEV_NONE; 2370c6fd2807SJeff Garzik ap->flags |= ATA_FLAG_DISABLED; 2371c6fd2807SJeff Garzik } 2372c6fd2807SJeff Garzik 2373c6fd2807SJeff Garzik /** 2374c6fd2807SJeff Garzik * sata_down_spd_limit - adjust SATA spd limit downward 2375c6fd2807SJeff Garzik * @ap: Port to adjust SATA spd limit for 2376c6fd2807SJeff Garzik * 2377c6fd2807SJeff Garzik * Adjust SATA spd limit of @ap downward. Note that this 2378c6fd2807SJeff Garzik * function only adjusts the limit. The change must be applied 2379c6fd2807SJeff Garzik * using sata_set_spd(). 2380c6fd2807SJeff Garzik * 2381c6fd2807SJeff Garzik * LOCKING: 2382c6fd2807SJeff Garzik * Inherited from caller. 2383c6fd2807SJeff Garzik * 2384c6fd2807SJeff Garzik * RETURNS: 2385c6fd2807SJeff Garzik * 0 on success, negative errno on failure 2386c6fd2807SJeff Garzik */ 2387c6fd2807SJeff Garzik int sata_down_spd_limit(struct ata_port *ap) 2388c6fd2807SJeff Garzik { 2389c6fd2807SJeff Garzik u32 sstatus, spd, mask; 2390c6fd2807SJeff Garzik int rc, highbit; 2391c6fd2807SJeff Garzik 2392008a7896STejun Heo if (!sata_scr_valid(ap)) 2393008a7896STejun Heo return -EOPNOTSUPP; 2394008a7896STejun Heo 2395008a7896STejun Heo /* If SCR can be read, use it to determine the current SPD. 2396008a7896STejun Heo * If not, use cached value in ap->sata_spd. 2397008a7896STejun Heo */ 2398c6fd2807SJeff Garzik rc = sata_scr_read(ap, SCR_STATUS, &sstatus); 2399008a7896STejun Heo if (rc == 0) 2400008a7896STejun Heo spd = (sstatus >> 4) & 0xf; 2401008a7896STejun Heo else 2402008a7896STejun Heo spd = ap->sata_spd; 2403c6fd2807SJeff Garzik 2404c6fd2807SJeff Garzik mask = ap->sata_spd_limit; 2405c6fd2807SJeff Garzik if (mask <= 1) 2406c6fd2807SJeff Garzik return -EINVAL; 2407008a7896STejun Heo 2408008a7896STejun Heo /* unconditionally mask off the highest bit */ 2409c6fd2807SJeff Garzik highbit = fls(mask) - 1; 2410c6fd2807SJeff Garzik mask &= ~(1 << highbit); 2411c6fd2807SJeff Garzik 2412008a7896STejun Heo /* Mask off all speeds higher than or equal to the current 2413008a7896STejun Heo * one. Force 1.5Gbps if current SPD is not available. 2414008a7896STejun Heo */ 2415008a7896STejun Heo if (spd > 1) 2416008a7896STejun Heo mask &= (1 << (spd - 1)) - 1; 2417008a7896STejun Heo else 2418008a7896STejun Heo mask &= 1; 2419008a7896STejun Heo 2420008a7896STejun Heo /* were we already at the bottom? */ 2421c6fd2807SJeff Garzik if (!mask) 2422c6fd2807SJeff Garzik return -EINVAL; 2423c6fd2807SJeff Garzik 2424c6fd2807SJeff Garzik ap->sata_spd_limit = mask; 2425c6fd2807SJeff Garzik 2426c6fd2807SJeff Garzik ata_port_printk(ap, KERN_WARNING, "limiting SATA link speed to %s\n", 2427c6fd2807SJeff Garzik sata_spd_string(fls(mask))); 2428c6fd2807SJeff Garzik 2429c6fd2807SJeff Garzik return 0; 2430c6fd2807SJeff Garzik } 2431c6fd2807SJeff Garzik 2432c6fd2807SJeff Garzik static int __sata_set_spd_needed(struct ata_port *ap, u32 *scontrol) 2433c6fd2807SJeff Garzik { 2434c6fd2807SJeff Garzik u32 spd, limit; 2435c6fd2807SJeff Garzik 2436c6fd2807SJeff Garzik if (ap->sata_spd_limit == UINT_MAX) 2437c6fd2807SJeff Garzik limit = 0; 2438c6fd2807SJeff Garzik else 2439c6fd2807SJeff Garzik limit = fls(ap->sata_spd_limit); 2440c6fd2807SJeff Garzik 2441c6fd2807SJeff Garzik spd = (*scontrol >> 4) & 0xf; 2442c6fd2807SJeff Garzik *scontrol = (*scontrol & ~0xf0) | ((limit & 0xf) << 4); 2443c6fd2807SJeff Garzik 2444c6fd2807SJeff Garzik return spd != limit; 2445c6fd2807SJeff Garzik } 2446c6fd2807SJeff Garzik 2447c6fd2807SJeff Garzik /** 2448c6fd2807SJeff Garzik * sata_set_spd_needed - is SATA spd configuration needed 2449c6fd2807SJeff Garzik * @ap: Port in question 2450c6fd2807SJeff Garzik * 2451c6fd2807SJeff Garzik * Test whether the spd limit in SControl matches 2452c6fd2807SJeff Garzik * @ap->sata_spd_limit. This function is used to determine 2453c6fd2807SJeff Garzik * whether hardreset is necessary to apply SATA spd 2454c6fd2807SJeff Garzik * configuration. 2455c6fd2807SJeff Garzik * 2456c6fd2807SJeff Garzik * LOCKING: 2457c6fd2807SJeff Garzik * Inherited from caller. 2458c6fd2807SJeff Garzik * 2459c6fd2807SJeff Garzik * RETURNS: 2460c6fd2807SJeff Garzik * 1 if SATA spd configuration is needed, 0 otherwise. 2461c6fd2807SJeff Garzik */ 2462c6fd2807SJeff Garzik int sata_set_spd_needed(struct ata_port *ap) 2463c6fd2807SJeff Garzik { 2464c6fd2807SJeff Garzik u32 scontrol; 2465c6fd2807SJeff Garzik 2466c6fd2807SJeff Garzik if (sata_scr_read(ap, SCR_CONTROL, &scontrol)) 2467c6fd2807SJeff Garzik return 0; 2468c6fd2807SJeff Garzik 2469c6fd2807SJeff Garzik return __sata_set_spd_needed(ap, &scontrol); 2470c6fd2807SJeff Garzik } 2471c6fd2807SJeff Garzik 2472c6fd2807SJeff Garzik /** 2473c6fd2807SJeff Garzik * sata_set_spd - set SATA spd according to spd limit 2474c6fd2807SJeff Garzik * @ap: Port to set SATA spd for 2475c6fd2807SJeff Garzik * 2476c6fd2807SJeff Garzik * Set SATA spd of @ap according to sata_spd_limit. 2477c6fd2807SJeff Garzik * 2478c6fd2807SJeff Garzik * LOCKING: 2479c6fd2807SJeff Garzik * Inherited from caller. 2480c6fd2807SJeff Garzik * 2481c6fd2807SJeff Garzik * RETURNS: 2482c6fd2807SJeff Garzik * 0 if spd doesn't need to be changed, 1 if spd has been 2483c6fd2807SJeff Garzik * changed. Negative errno if SCR registers are inaccessible. 2484c6fd2807SJeff Garzik */ 2485c6fd2807SJeff Garzik int sata_set_spd(struct ata_port *ap) 2486c6fd2807SJeff Garzik { 2487c6fd2807SJeff Garzik u32 scontrol; 2488c6fd2807SJeff Garzik int rc; 2489c6fd2807SJeff Garzik 2490c6fd2807SJeff Garzik if ((rc = sata_scr_read(ap, SCR_CONTROL, &scontrol))) 2491c6fd2807SJeff Garzik return rc; 2492c6fd2807SJeff Garzik 2493c6fd2807SJeff Garzik if (!__sata_set_spd_needed(ap, &scontrol)) 2494c6fd2807SJeff Garzik return 0; 2495c6fd2807SJeff Garzik 2496c6fd2807SJeff Garzik if ((rc = sata_scr_write(ap, SCR_CONTROL, scontrol))) 2497c6fd2807SJeff Garzik return rc; 2498c6fd2807SJeff Garzik 2499c6fd2807SJeff Garzik return 1; 2500c6fd2807SJeff Garzik } 2501c6fd2807SJeff Garzik 2502c6fd2807SJeff Garzik /* 2503c6fd2807SJeff Garzik * This mode timing computation functionality is ported over from 2504c6fd2807SJeff Garzik * drivers/ide/ide-timing.h and was originally written by Vojtech Pavlik 2505c6fd2807SJeff Garzik */ 2506c6fd2807SJeff Garzik /* 2507b352e57dSAlan Cox * PIO 0-4, MWDMA 0-2 and UDMA 0-6 timings (in nanoseconds). 2508c6fd2807SJeff Garzik * These were taken from ATA/ATAPI-6 standard, rev 0a, except 2509b352e57dSAlan Cox * for UDMA6, which is currently supported only by Maxtor drives. 2510b352e57dSAlan Cox * 2511b352e57dSAlan Cox * For PIO 5/6 MWDMA 3/4 see the CFA specification 3.0. 2512c6fd2807SJeff Garzik */ 2513c6fd2807SJeff Garzik 2514c6fd2807SJeff Garzik static const struct ata_timing ata_timing[] = { 2515c6fd2807SJeff Garzik 2516c6fd2807SJeff Garzik { XFER_UDMA_6, 0, 0, 0, 0, 0, 0, 0, 15 }, 2517c6fd2807SJeff Garzik { XFER_UDMA_5, 0, 0, 0, 0, 0, 0, 0, 20 }, 2518c6fd2807SJeff Garzik { XFER_UDMA_4, 0, 0, 0, 0, 0, 0, 0, 30 }, 2519c6fd2807SJeff Garzik { XFER_UDMA_3, 0, 0, 0, 0, 0, 0, 0, 45 }, 2520c6fd2807SJeff Garzik 2521b352e57dSAlan Cox { XFER_MW_DMA_4, 25, 0, 0, 0, 55, 20, 80, 0 }, 2522b352e57dSAlan Cox { XFER_MW_DMA_3, 25, 0, 0, 0, 65, 25, 100, 0 }, 2523c6fd2807SJeff Garzik { XFER_UDMA_2, 0, 0, 0, 0, 0, 0, 0, 60 }, 2524c6fd2807SJeff Garzik { XFER_UDMA_1, 0, 0, 0, 0, 0, 0, 0, 80 }, 2525c6fd2807SJeff Garzik { XFER_UDMA_0, 0, 0, 0, 0, 0, 0, 0, 120 }, 2526c6fd2807SJeff Garzik 2527c6fd2807SJeff Garzik /* { XFER_UDMA_SLOW, 0, 0, 0, 0, 0, 0, 0, 150 }, */ 2528c6fd2807SJeff Garzik 2529c6fd2807SJeff Garzik { XFER_MW_DMA_2, 25, 0, 0, 0, 70, 25, 120, 0 }, 2530c6fd2807SJeff Garzik { XFER_MW_DMA_1, 45, 0, 0, 0, 80, 50, 150, 0 }, 2531c6fd2807SJeff Garzik { XFER_MW_DMA_0, 60, 0, 0, 0, 215, 215, 480, 0 }, 2532c6fd2807SJeff Garzik 2533c6fd2807SJeff Garzik { XFER_SW_DMA_2, 60, 0, 0, 0, 120, 120, 240, 0 }, 2534c6fd2807SJeff Garzik { XFER_SW_DMA_1, 90, 0, 0, 0, 240, 240, 480, 0 }, 2535c6fd2807SJeff Garzik { XFER_SW_DMA_0, 120, 0, 0, 0, 480, 480, 960, 0 }, 2536c6fd2807SJeff Garzik 2537b352e57dSAlan Cox { XFER_PIO_6, 10, 55, 20, 80, 55, 20, 80, 0 }, 2538b352e57dSAlan Cox { XFER_PIO_5, 15, 65, 25, 100, 65, 25, 100, 0 }, 2539c6fd2807SJeff Garzik { XFER_PIO_4, 25, 70, 25, 120, 70, 25, 120, 0 }, 2540c6fd2807SJeff Garzik { XFER_PIO_3, 30, 80, 70, 180, 80, 70, 180, 0 }, 2541c6fd2807SJeff Garzik 2542c6fd2807SJeff Garzik { XFER_PIO_2, 30, 290, 40, 330, 100, 90, 240, 0 }, 2543c6fd2807SJeff Garzik { XFER_PIO_1, 50, 290, 93, 383, 125, 100, 383, 0 }, 2544c6fd2807SJeff Garzik { XFER_PIO_0, 70, 290, 240, 600, 165, 150, 600, 0 }, 2545c6fd2807SJeff Garzik 2546c6fd2807SJeff Garzik /* { XFER_PIO_SLOW, 120, 290, 240, 960, 290, 240, 960, 0 }, */ 2547c6fd2807SJeff Garzik 2548c6fd2807SJeff Garzik { 0xFF } 2549c6fd2807SJeff Garzik }; 2550c6fd2807SJeff Garzik 2551c6fd2807SJeff Garzik #define ENOUGH(v,unit) (((v)-1)/(unit)+1) 2552c6fd2807SJeff Garzik #define EZ(v,unit) ((v)?ENOUGH(v,unit):0) 2553c6fd2807SJeff Garzik 2554c6fd2807SJeff Garzik static void ata_timing_quantize(const struct ata_timing *t, struct ata_timing *q, int T, int UT) 2555c6fd2807SJeff Garzik { 2556c6fd2807SJeff Garzik q->setup = EZ(t->setup * 1000, T); 2557c6fd2807SJeff Garzik q->act8b = EZ(t->act8b * 1000, T); 2558c6fd2807SJeff Garzik q->rec8b = EZ(t->rec8b * 1000, T); 2559c6fd2807SJeff Garzik q->cyc8b = EZ(t->cyc8b * 1000, T); 2560c6fd2807SJeff Garzik q->active = EZ(t->active * 1000, T); 2561c6fd2807SJeff Garzik q->recover = EZ(t->recover * 1000, T); 2562c6fd2807SJeff Garzik q->cycle = EZ(t->cycle * 1000, T); 2563c6fd2807SJeff Garzik q->udma = EZ(t->udma * 1000, UT); 2564c6fd2807SJeff Garzik } 2565c6fd2807SJeff Garzik 2566c6fd2807SJeff Garzik void ata_timing_merge(const struct ata_timing *a, const struct ata_timing *b, 2567c6fd2807SJeff Garzik struct ata_timing *m, unsigned int what) 2568c6fd2807SJeff Garzik { 2569c6fd2807SJeff Garzik if (what & ATA_TIMING_SETUP ) m->setup = max(a->setup, b->setup); 2570c6fd2807SJeff Garzik if (what & ATA_TIMING_ACT8B ) m->act8b = max(a->act8b, b->act8b); 2571c6fd2807SJeff Garzik if (what & ATA_TIMING_REC8B ) m->rec8b = max(a->rec8b, b->rec8b); 2572c6fd2807SJeff Garzik if (what & ATA_TIMING_CYC8B ) m->cyc8b = max(a->cyc8b, b->cyc8b); 2573c6fd2807SJeff Garzik if (what & ATA_TIMING_ACTIVE ) m->active = max(a->active, b->active); 2574c6fd2807SJeff Garzik if (what & ATA_TIMING_RECOVER) m->recover = max(a->recover, b->recover); 2575c6fd2807SJeff Garzik if (what & ATA_TIMING_CYCLE ) m->cycle = max(a->cycle, b->cycle); 2576c6fd2807SJeff Garzik if (what & ATA_TIMING_UDMA ) m->udma = max(a->udma, b->udma); 2577c6fd2807SJeff Garzik } 2578c6fd2807SJeff Garzik 2579c6fd2807SJeff Garzik static const struct ata_timing* ata_timing_find_mode(unsigned short speed) 2580c6fd2807SJeff Garzik { 2581c6fd2807SJeff Garzik const struct ata_timing *t; 2582c6fd2807SJeff Garzik 2583c6fd2807SJeff Garzik for (t = ata_timing; t->mode != speed; t++) 2584c6fd2807SJeff Garzik if (t->mode == 0xFF) 2585c6fd2807SJeff Garzik return NULL; 2586c6fd2807SJeff Garzik return t; 2587c6fd2807SJeff Garzik } 2588c6fd2807SJeff Garzik 2589c6fd2807SJeff Garzik int ata_timing_compute(struct ata_device *adev, unsigned short speed, 2590c6fd2807SJeff Garzik struct ata_timing *t, int T, int UT) 2591c6fd2807SJeff Garzik { 2592c6fd2807SJeff Garzik const struct ata_timing *s; 2593c6fd2807SJeff Garzik struct ata_timing p; 2594c6fd2807SJeff Garzik 2595c6fd2807SJeff Garzik /* 2596c6fd2807SJeff Garzik * Find the mode. 2597c6fd2807SJeff Garzik */ 2598c6fd2807SJeff Garzik 2599c6fd2807SJeff Garzik if (!(s = ata_timing_find_mode(speed))) 2600c6fd2807SJeff Garzik return -EINVAL; 2601c6fd2807SJeff Garzik 2602c6fd2807SJeff Garzik memcpy(t, s, sizeof(*s)); 2603c6fd2807SJeff Garzik 2604c6fd2807SJeff Garzik /* 2605c6fd2807SJeff Garzik * If the drive is an EIDE drive, it can tell us it needs extended 2606c6fd2807SJeff Garzik * PIO/MW_DMA cycle timing. 2607c6fd2807SJeff Garzik */ 2608c6fd2807SJeff Garzik 2609c6fd2807SJeff Garzik if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE drive */ 2610c6fd2807SJeff Garzik memset(&p, 0, sizeof(p)); 2611c6fd2807SJeff Garzik if(speed >= XFER_PIO_0 && speed <= XFER_SW_DMA_0) { 2612c6fd2807SJeff Garzik if (speed <= XFER_PIO_2) p.cycle = p.cyc8b = adev->id[ATA_ID_EIDE_PIO]; 2613c6fd2807SJeff Garzik else p.cycle = p.cyc8b = adev->id[ATA_ID_EIDE_PIO_IORDY]; 2614c6fd2807SJeff Garzik } else if(speed >= XFER_MW_DMA_0 && speed <= XFER_MW_DMA_2) { 2615c6fd2807SJeff Garzik p.cycle = adev->id[ATA_ID_EIDE_DMA_MIN]; 2616c6fd2807SJeff Garzik } 2617c6fd2807SJeff Garzik ata_timing_merge(&p, t, t, ATA_TIMING_CYCLE | ATA_TIMING_CYC8B); 2618c6fd2807SJeff Garzik } 2619c6fd2807SJeff Garzik 2620c6fd2807SJeff Garzik /* 2621c6fd2807SJeff Garzik * Convert the timing to bus clock counts. 2622c6fd2807SJeff Garzik */ 2623c6fd2807SJeff Garzik 2624c6fd2807SJeff Garzik ata_timing_quantize(t, t, T, UT); 2625c6fd2807SJeff Garzik 2626c6fd2807SJeff Garzik /* 2627c6fd2807SJeff Garzik * Even in DMA/UDMA modes we still use PIO access for IDENTIFY, 2628c6fd2807SJeff Garzik * S.M.A.R.T * and some other commands. We have to ensure that the 2629c6fd2807SJeff Garzik * DMA cycle timing is slower/equal than the fastest PIO timing. 2630c6fd2807SJeff Garzik */ 2631c6fd2807SJeff Garzik 2632fd3367afSAlan if (speed > XFER_PIO_6) { 2633c6fd2807SJeff Garzik ata_timing_compute(adev, adev->pio_mode, &p, T, UT); 2634c6fd2807SJeff Garzik ata_timing_merge(&p, t, t, ATA_TIMING_ALL); 2635c6fd2807SJeff Garzik } 2636c6fd2807SJeff Garzik 2637c6fd2807SJeff Garzik /* 2638c6fd2807SJeff Garzik * Lengthen active & recovery time so that cycle time is correct. 2639c6fd2807SJeff Garzik */ 2640c6fd2807SJeff Garzik 2641c6fd2807SJeff Garzik if (t->act8b + t->rec8b < t->cyc8b) { 2642c6fd2807SJeff Garzik t->act8b += (t->cyc8b - (t->act8b + t->rec8b)) / 2; 2643c6fd2807SJeff Garzik t->rec8b = t->cyc8b - t->act8b; 2644c6fd2807SJeff Garzik } 2645c6fd2807SJeff Garzik 2646c6fd2807SJeff Garzik if (t->active + t->recover < t->cycle) { 2647c6fd2807SJeff Garzik t->active += (t->cycle - (t->active + t->recover)) / 2; 2648c6fd2807SJeff Garzik t->recover = t->cycle - t->active; 2649c6fd2807SJeff Garzik } 26504f701d1eSAlan Cox 26514f701d1eSAlan Cox /* In a few cases quantisation may produce enough errors to 26524f701d1eSAlan Cox leave t->cycle too low for the sum of active and recovery 26534f701d1eSAlan Cox if so we must correct this */ 26544f701d1eSAlan Cox if (t->active + t->recover > t->cycle) 26554f701d1eSAlan Cox t->cycle = t->active + t->recover; 2656c6fd2807SJeff Garzik 2657c6fd2807SJeff Garzik return 0; 2658c6fd2807SJeff Garzik } 2659c6fd2807SJeff Garzik 2660c6fd2807SJeff Garzik /** 2661c6fd2807SJeff Garzik * ata_down_xfermask_limit - adjust dev xfer masks downward 2662c6fd2807SJeff Garzik * @dev: Device to adjust xfer masks 2663458337dbSTejun Heo * @sel: ATA_DNXFER_* selector 2664c6fd2807SJeff Garzik * 2665c6fd2807SJeff Garzik * Adjust xfer masks of @dev downward. Note that this function 2666c6fd2807SJeff Garzik * does not apply the change. Invoking ata_set_mode() afterwards 2667c6fd2807SJeff Garzik * will apply the limit. 2668c6fd2807SJeff Garzik * 2669c6fd2807SJeff Garzik * LOCKING: 2670c6fd2807SJeff Garzik * Inherited from caller. 2671c6fd2807SJeff Garzik * 2672c6fd2807SJeff Garzik * RETURNS: 2673c6fd2807SJeff Garzik * 0 on success, negative errno on failure 2674c6fd2807SJeff Garzik */ 2675458337dbSTejun Heo int ata_down_xfermask_limit(struct ata_device *dev, unsigned int sel) 2676c6fd2807SJeff Garzik { 2677458337dbSTejun Heo char buf[32]; 2678458337dbSTejun Heo unsigned int orig_mask, xfer_mask; 2679458337dbSTejun Heo unsigned int pio_mask, mwdma_mask, udma_mask; 2680458337dbSTejun Heo int quiet, highbit; 2681c6fd2807SJeff Garzik 2682458337dbSTejun Heo quiet = !!(sel & ATA_DNXFER_QUIET); 2683458337dbSTejun Heo sel &= ~ATA_DNXFER_QUIET; 2684458337dbSTejun Heo 2685458337dbSTejun Heo xfer_mask = orig_mask = ata_pack_xfermask(dev->pio_mask, 2686458337dbSTejun Heo dev->mwdma_mask, 2687c6fd2807SJeff Garzik dev->udma_mask); 2688458337dbSTejun Heo ata_unpack_xfermask(xfer_mask, &pio_mask, &mwdma_mask, &udma_mask); 2689c6fd2807SJeff Garzik 2690458337dbSTejun Heo switch (sel) { 2691458337dbSTejun Heo case ATA_DNXFER_PIO: 2692458337dbSTejun Heo highbit = fls(pio_mask) - 1; 2693458337dbSTejun Heo pio_mask &= ~(1 << highbit); 2694458337dbSTejun Heo break; 2695458337dbSTejun Heo 2696458337dbSTejun Heo case ATA_DNXFER_DMA: 2697458337dbSTejun Heo if (udma_mask) { 2698458337dbSTejun Heo highbit = fls(udma_mask) - 1; 2699458337dbSTejun Heo udma_mask &= ~(1 << highbit); 2700458337dbSTejun Heo if (!udma_mask) 2701458337dbSTejun Heo return -ENOENT; 2702458337dbSTejun Heo } else if (mwdma_mask) { 2703458337dbSTejun Heo highbit = fls(mwdma_mask) - 1; 2704458337dbSTejun Heo mwdma_mask &= ~(1 << highbit); 2705458337dbSTejun Heo if (!mwdma_mask) 2706458337dbSTejun Heo return -ENOENT; 2707458337dbSTejun Heo } 2708458337dbSTejun Heo break; 2709458337dbSTejun Heo 2710458337dbSTejun Heo case ATA_DNXFER_40C: 2711458337dbSTejun Heo udma_mask &= ATA_UDMA_MASK_40C; 2712458337dbSTejun Heo break; 2713458337dbSTejun Heo 2714458337dbSTejun Heo case ATA_DNXFER_FORCE_PIO0: 2715458337dbSTejun Heo pio_mask &= 1; 2716458337dbSTejun Heo case ATA_DNXFER_FORCE_PIO: 2717458337dbSTejun Heo mwdma_mask = 0; 2718458337dbSTejun Heo udma_mask = 0; 2719458337dbSTejun Heo break; 2720458337dbSTejun Heo 2721458337dbSTejun Heo default: 2722458337dbSTejun Heo BUG(); 2723458337dbSTejun Heo } 2724458337dbSTejun Heo 2725458337dbSTejun Heo xfer_mask &= ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask); 2726458337dbSTejun Heo 2727458337dbSTejun Heo if (!(xfer_mask & ATA_MASK_PIO) || xfer_mask == orig_mask) 2728458337dbSTejun Heo return -ENOENT; 2729458337dbSTejun Heo 2730458337dbSTejun Heo if (!quiet) { 2731458337dbSTejun Heo if (xfer_mask & (ATA_MASK_MWDMA | ATA_MASK_UDMA)) 2732458337dbSTejun Heo snprintf(buf, sizeof(buf), "%s:%s", 2733458337dbSTejun Heo ata_mode_string(xfer_mask), 2734458337dbSTejun Heo ata_mode_string(xfer_mask & ATA_MASK_PIO)); 2735458337dbSTejun Heo else 2736458337dbSTejun Heo snprintf(buf, sizeof(buf), "%s", 2737458337dbSTejun Heo ata_mode_string(xfer_mask)); 2738458337dbSTejun Heo 2739458337dbSTejun Heo ata_dev_printk(dev, KERN_WARNING, 2740458337dbSTejun Heo "limiting speed to %s\n", buf); 2741458337dbSTejun Heo } 2742c6fd2807SJeff Garzik 2743c6fd2807SJeff Garzik ata_unpack_xfermask(xfer_mask, &dev->pio_mask, &dev->mwdma_mask, 2744c6fd2807SJeff Garzik &dev->udma_mask); 2745c6fd2807SJeff Garzik 2746c6fd2807SJeff Garzik return 0; 2747c6fd2807SJeff Garzik } 2748c6fd2807SJeff Garzik 2749c6fd2807SJeff Garzik static int ata_dev_set_mode(struct ata_device *dev) 2750c6fd2807SJeff Garzik { 2751baa1e78aSTejun Heo struct ata_eh_context *ehc = &dev->ap->eh_context; 2752c6fd2807SJeff Garzik unsigned int err_mask; 2753c6fd2807SJeff Garzik int rc; 2754c6fd2807SJeff Garzik 2755c6fd2807SJeff Garzik dev->flags &= ~ATA_DFLAG_PIO; 2756c6fd2807SJeff Garzik if (dev->xfer_shift == ATA_SHIFT_PIO) 2757c6fd2807SJeff Garzik dev->flags |= ATA_DFLAG_PIO; 2758c6fd2807SJeff Garzik 2759c6fd2807SJeff Garzik err_mask = ata_dev_set_xfermode(dev); 276011750a40SAlan /* Old CFA may refuse this command, which is just fine */ 276111750a40SAlan if (dev->xfer_shift == ATA_SHIFT_PIO && ata_id_is_cfa(dev->id)) 276211750a40SAlan err_mask &= ~AC_ERR_DEV; 276311750a40SAlan 2764c6fd2807SJeff Garzik if (err_mask) { 2765c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_ERR, "failed to set xfermode " 2766c6fd2807SJeff Garzik "(err_mask=0x%x)\n", err_mask); 2767c6fd2807SJeff Garzik return -EIO; 2768c6fd2807SJeff Garzik } 2769c6fd2807SJeff Garzik 2770baa1e78aSTejun Heo ehc->i.flags |= ATA_EHI_POST_SETMODE; 2771c6fd2807SJeff Garzik rc = ata_dev_revalidate(dev, 0); 2772baa1e78aSTejun Heo ehc->i.flags &= ~ATA_EHI_POST_SETMODE; 2773c6fd2807SJeff Garzik if (rc) 2774c6fd2807SJeff Garzik return rc; 2775c6fd2807SJeff Garzik 2776c6fd2807SJeff Garzik DPRINTK("xfer_shift=%u, xfer_mode=0x%x\n", 2777c6fd2807SJeff Garzik dev->xfer_shift, (int)dev->xfer_mode); 2778c6fd2807SJeff Garzik 2779c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_INFO, "configured for %s\n", 2780c6fd2807SJeff Garzik ata_mode_string(ata_xfer_mode2mask(dev->xfer_mode))); 2781c6fd2807SJeff Garzik return 0; 2782c6fd2807SJeff Garzik } 2783c6fd2807SJeff Garzik 2784c6fd2807SJeff Garzik /** 278504351821SAlan * ata_do_set_mode - Program timings and issue SET FEATURES - XFER 2786c6fd2807SJeff Garzik * @ap: port on which timings will be programmed 2787c6fd2807SJeff Garzik * @r_failed_dev: out paramter for failed device 2788c6fd2807SJeff Garzik * 278904351821SAlan * Standard implementation of the function used to tune and set 279004351821SAlan * ATA device disk transfer mode (PIO3, UDMA6, etc.). If 279104351821SAlan * ata_dev_set_mode() fails, pointer to the failing device is 2792c6fd2807SJeff Garzik * returned in @r_failed_dev. 2793c6fd2807SJeff Garzik * 2794c6fd2807SJeff Garzik * LOCKING: 2795c6fd2807SJeff Garzik * PCI/etc. bus probe sem. 2796c6fd2807SJeff Garzik * 2797c6fd2807SJeff Garzik * RETURNS: 2798c6fd2807SJeff Garzik * 0 on success, negative errno otherwise 2799c6fd2807SJeff Garzik */ 280004351821SAlan 280104351821SAlan int ata_do_set_mode(struct ata_port *ap, struct ata_device **r_failed_dev) 2802c6fd2807SJeff Garzik { 2803c6fd2807SJeff Garzik struct ata_device *dev; 2804c6fd2807SJeff Garzik int i, rc = 0, used_dma = 0, found = 0; 2805c6fd2807SJeff Garzik 2806c6fd2807SJeff Garzik 2807c6fd2807SJeff Garzik /* step 1: calculate xfer_mask */ 2808c6fd2807SJeff Garzik for (i = 0; i < ATA_MAX_DEVICES; i++) { 2809c6fd2807SJeff Garzik unsigned int pio_mask, dma_mask; 2810c6fd2807SJeff Garzik 2811c6fd2807SJeff Garzik dev = &ap->device[i]; 2812c6fd2807SJeff Garzik 2813c6fd2807SJeff Garzik if (!ata_dev_enabled(dev)) 2814c6fd2807SJeff Garzik continue; 2815c6fd2807SJeff Garzik 2816c6fd2807SJeff Garzik ata_dev_xfermask(dev); 2817c6fd2807SJeff Garzik 2818c6fd2807SJeff Garzik pio_mask = ata_pack_xfermask(dev->pio_mask, 0, 0); 2819c6fd2807SJeff Garzik dma_mask = ata_pack_xfermask(0, dev->mwdma_mask, dev->udma_mask); 2820c6fd2807SJeff Garzik dev->pio_mode = ata_xfer_mask2mode(pio_mask); 2821c6fd2807SJeff Garzik dev->dma_mode = ata_xfer_mask2mode(dma_mask); 2822c6fd2807SJeff Garzik 2823c6fd2807SJeff Garzik found = 1; 2824c6fd2807SJeff Garzik if (dev->dma_mode) 2825c6fd2807SJeff Garzik used_dma = 1; 2826c6fd2807SJeff Garzik } 2827c6fd2807SJeff Garzik if (!found) 2828c6fd2807SJeff Garzik goto out; 2829c6fd2807SJeff Garzik 2830c6fd2807SJeff Garzik /* step 2: always set host PIO timings */ 2831c6fd2807SJeff Garzik for (i = 0; i < ATA_MAX_DEVICES; i++) { 2832c6fd2807SJeff Garzik dev = &ap->device[i]; 2833c6fd2807SJeff Garzik if (!ata_dev_enabled(dev)) 2834c6fd2807SJeff Garzik continue; 2835c6fd2807SJeff Garzik 2836c6fd2807SJeff Garzik if (!dev->pio_mode) { 2837c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_WARNING, "no PIO support\n"); 2838c6fd2807SJeff Garzik rc = -EINVAL; 2839c6fd2807SJeff Garzik goto out; 2840c6fd2807SJeff Garzik } 2841c6fd2807SJeff Garzik 2842c6fd2807SJeff Garzik dev->xfer_mode = dev->pio_mode; 2843c6fd2807SJeff Garzik dev->xfer_shift = ATA_SHIFT_PIO; 2844c6fd2807SJeff Garzik if (ap->ops->set_piomode) 2845c6fd2807SJeff Garzik ap->ops->set_piomode(ap, dev); 2846c6fd2807SJeff Garzik } 2847c6fd2807SJeff Garzik 2848c6fd2807SJeff Garzik /* step 3: set host DMA timings */ 2849c6fd2807SJeff Garzik for (i = 0; i < ATA_MAX_DEVICES; i++) { 2850c6fd2807SJeff Garzik dev = &ap->device[i]; 2851c6fd2807SJeff Garzik 2852c6fd2807SJeff Garzik if (!ata_dev_enabled(dev) || !dev->dma_mode) 2853c6fd2807SJeff Garzik continue; 2854c6fd2807SJeff Garzik 2855c6fd2807SJeff Garzik dev->xfer_mode = dev->dma_mode; 2856c6fd2807SJeff Garzik dev->xfer_shift = ata_xfer_mode2shift(dev->dma_mode); 2857c6fd2807SJeff Garzik if (ap->ops->set_dmamode) 2858c6fd2807SJeff Garzik ap->ops->set_dmamode(ap, dev); 2859c6fd2807SJeff Garzik } 2860c6fd2807SJeff Garzik 2861c6fd2807SJeff Garzik /* step 4: update devices' xfer mode */ 2862c6fd2807SJeff Garzik for (i = 0; i < ATA_MAX_DEVICES; i++) { 2863c6fd2807SJeff Garzik dev = &ap->device[i]; 2864c6fd2807SJeff Garzik 286518d90debSAlan /* don't update suspended devices' xfer mode */ 28669666f400STejun Heo if (!ata_dev_enabled(dev)) 2867c6fd2807SJeff Garzik continue; 2868c6fd2807SJeff Garzik 2869c6fd2807SJeff Garzik rc = ata_dev_set_mode(dev); 2870c6fd2807SJeff Garzik if (rc) 2871c6fd2807SJeff Garzik goto out; 2872c6fd2807SJeff Garzik } 2873c6fd2807SJeff Garzik 2874c6fd2807SJeff Garzik /* Record simplex status. If we selected DMA then the other 2875c6fd2807SJeff Garzik * host channels are not permitted to do so. 2876c6fd2807SJeff Garzik */ 2877cca3974eSJeff Garzik if (used_dma && (ap->host->flags & ATA_HOST_SIMPLEX)) 2878032af1ceSAlan ap->host->simplex_claimed = ap; 2879c6fd2807SJeff Garzik 2880c6fd2807SJeff Garzik out: 2881c6fd2807SJeff Garzik if (rc) 2882c6fd2807SJeff Garzik *r_failed_dev = dev; 2883c6fd2807SJeff Garzik return rc; 2884c6fd2807SJeff Garzik } 2885c6fd2807SJeff Garzik 2886c6fd2807SJeff Garzik /** 288704351821SAlan * ata_set_mode - Program timings and issue SET FEATURES - XFER 288804351821SAlan * @ap: port on which timings will be programmed 288904351821SAlan * @r_failed_dev: out paramter for failed device 289004351821SAlan * 289104351821SAlan * Set ATA device disk transfer mode (PIO3, UDMA6, etc.). If 289204351821SAlan * ata_set_mode() fails, pointer to the failing device is 289304351821SAlan * returned in @r_failed_dev. 289404351821SAlan * 289504351821SAlan * LOCKING: 289604351821SAlan * PCI/etc. bus probe sem. 289704351821SAlan * 289804351821SAlan * RETURNS: 289904351821SAlan * 0 on success, negative errno otherwise 290004351821SAlan */ 290104351821SAlan int ata_set_mode(struct ata_port *ap, struct ata_device **r_failed_dev) 290204351821SAlan { 290304351821SAlan /* has private set_mode? */ 290404351821SAlan if (ap->ops->set_mode) 290504351821SAlan return ap->ops->set_mode(ap, r_failed_dev); 290604351821SAlan return ata_do_set_mode(ap, r_failed_dev); 290704351821SAlan } 290804351821SAlan 290904351821SAlan /** 2910c6fd2807SJeff Garzik * ata_tf_to_host - issue ATA taskfile to host controller 2911c6fd2807SJeff Garzik * @ap: port to which command is being issued 2912c6fd2807SJeff Garzik * @tf: ATA taskfile register set 2913c6fd2807SJeff Garzik * 2914c6fd2807SJeff Garzik * Issues ATA taskfile register set to ATA host controller, 2915c6fd2807SJeff Garzik * with proper synchronization with interrupt handler and 2916c6fd2807SJeff Garzik * other threads. 2917c6fd2807SJeff Garzik * 2918c6fd2807SJeff Garzik * LOCKING: 2919cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 2920c6fd2807SJeff Garzik */ 2921c6fd2807SJeff Garzik 2922c6fd2807SJeff Garzik static inline void ata_tf_to_host(struct ata_port *ap, 2923c6fd2807SJeff Garzik const struct ata_taskfile *tf) 2924c6fd2807SJeff Garzik { 2925c6fd2807SJeff Garzik ap->ops->tf_load(ap, tf); 2926c6fd2807SJeff Garzik ap->ops->exec_command(ap, tf); 2927c6fd2807SJeff Garzik } 2928c6fd2807SJeff Garzik 2929c6fd2807SJeff Garzik /** 2930c6fd2807SJeff Garzik * ata_busy_sleep - sleep until BSY clears, or timeout 2931c6fd2807SJeff Garzik * @ap: port containing status register to be polled 2932c6fd2807SJeff Garzik * @tmout_pat: impatience timeout 2933c6fd2807SJeff Garzik * @tmout: overall timeout 2934c6fd2807SJeff Garzik * 2935c6fd2807SJeff Garzik * Sleep until ATA Status register bit BSY clears, 2936c6fd2807SJeff Garzik * or a timeout occurs. 2937c6fd2807SJeff Garzik * 2938d1adc1bbSTejun Heo * LOCKING: 2939d1adc1bbSTejun Heo * Kernel thread context (may sleep). 2940d1adc1bbSTejun Heo * 2941d1adc1bbSTejun Heo * RETURNS: 2942d1adc1bbSTejun Heo * 0 on success, -errno otherwise. 2943c6fd2807SJeff Garzik */ 2944d1adc1bbSTejun Heo int ata_busy_sleep(struct ata_port *ap, 2945c6fd2807SJeff Garzik unsigned long tmout_pat, unsigned long tmout) 2946c6fd2807SJeff Garzik { 2947c6fd2807SJeff Garzik unsigned long timer_start, timeout; 2948c6fd2807SJeff Garzik u8 status; 2949c6fd2807SJeff Garzik 2950c6fd2807SJeff Garzik status = ata_busy_wait(ap, ATA_BUSY, 300); 2951c6fd2807SJeff Garzik timer_start = jiffies; 2952c6fd2807SJeff Garzik timeout = timer_start + tmout_pat; 2953d1adc1bbSTejun Heo while (status != 0xff && (status & ATA_BUSY) && 2954d1adc1bbSTejun Heo time_before(jiffies, timeout)) { 2955c6fd2807SJeff Garzik msleep(50); 2956c6fd2807SJeff Garzik status = ata_busy_wait(ap, ATA_BUSY, 3); 2957c6fd2807SJeff Garzik } 2958c6fd2807SJeff Garzik 2959d1adc1bbSTejun Heo if (status != 0xff && (status & ATA_BUSY)) 2960c6fd2807SJeff Garzik ata_port_printk(ap, KERN_WARNING, 296135aa7a43SJeff Garzik "port is slow to respond, please be patient " 296235aa7a43SJeff Garzik "(Status 0x%x)\n", status); 2963c6fd2807SJeff Garzik 2964c6fd2807SJeff Garzik timeout = timer_start + tmout; 2965d1adc1bbSTejun Heo while (status != 0xff && (status & ATA_BUSY) && 2966d1adc1bbSTejun Heo time_before(jiffies, timeout)) { 2967c6fd2807SJeff Garzik msleep(50); 2968c6fd2807SJeff Garzik status = ata_chk_status(ap); 2969c6fd2807SJeff Garzik } 2970c6fd2807SJeff Garzik 2971d1adc1bbSTejun Heo if (status == 0xff) 2972d1adc1bbSTejun Heo return -ENODEV; 2973d1adc1bbSTejun Heo 2974c6fd2807SJeff Garzik if (status & ATA_BUSY) { 2975c6fd2807SJeff Garzik ata_port_printk(ap, KERN_ERR, "port failed to respond " 297635aa7a43SJeff Garzik "(%lu secs, Status 0x%x)\n", 297735aa7a43SJeff Garzik tmout / HZ, status); 2978d1adc1bbSTejun Heo return -EBUSY; 2979c6fd2807SJeff Garzik } 2980c6fd2807SJeff Garzik 2981c6fd2807SJeff Garzik return 0; 2982c6fd2807SJeff Garzik } 2983c6fd2807SJeff Garzik 2984d4b2bab4STejun Heo /** 2985d4b2bab4STejun Heo * ata_wait_ready - sleep until BSY clears, or timeout 2986d4b2bab4STejun Heo * @ap: port containing status register to be polled 2987d4b2bab4STejun Heo * @deadline: deadline jiffies for the operation 2988d4b2bab4STejun Heo * 2989d4b2bab4STejun Heo * Sleep until ATA Status register bit BSY clears, or timeout 2990d4b2bab4STejun Heo * occurs. 2991d4b2bab4STejun Heo * 2992d4b2bab4STejun Heo * LOCKING: 2993d4b2bab4STejun Heo * Kernel thread context (may sleep). 2994d4b2bab4STejun Heo * 2995d4b2bab4STejun Heo * RETURNS: 2996d4b2bab4STejun Heo * 0 on success, -errno otherwise. 2997d4b2bab4STejun Heo */ 2998d4b2bab4STejun Heo int ata_wait_ready(struct ata_port *ap, unsigned long deadline) 2999d4b2bab4STejun Heo { 3000d4b2bab4STejun Heo unsigned long start = jiffies; 3001d4b2bab4STejun Heo int warned = 0; 3002d4b2bab4STejun Heo 3003d4b2bab4STejun Heo while (1) { 3004d4b2bab4STejun Heo u8 status = ata_chk_status(ap); 3005d4b2bab4STejun Heo unsigned long now = jiffies; 3006d4b2bab4STejun Heo 3007d4b2bab4STejun Heo if (!(status & ATA_BUSY)) 3008d4b2bab4STejun Heo return 0; 3009fd7fe701STejun Heo if (!ata_port_online(ap) && status == 0xff) 3010d4b2bab4STejun Heo return -ENODEV; 3011d4b2bab4STejun Heo if (time_after(now, deadline)) 3012d4b2bab4STejun Heo return -EBUSY; 3013d4b2bab4STejun Heo 3014d4b2bab4STejun Heo if (!warned && time_after(now, start + 5 * HZ) && 3015d4b2bab4STejun Heo (deadline - now > 3 * HZ)) { 3016d4b2bab4STejun Heo ata_port_printk(ap, KERN_WARNING, 3017d4b2bab4STejun Heo "port is slow to respond, please be patient " 3018d4b2bab4STejun Heo "(Status 0x%x)\n", status); 3019d4b2bab4STejun Heo warned = 1; 3020d4b2bab4STejun Heo } 3021d4b2bab4STejun Heo 3022d4b2bab4STejun Heo msleep(50); 3023d4b2bab4STejun Heo } 3024d4b2bab4STejun Heo } 3025d4b2bab4STejun Heo 3026d4b2bab4STejun Heo static int ata_bus_post_reset(struct ata_port *ap, unsigned int devmask, 3027d4b2bab4STejun Heo unsigned long deadline) 3028c6fd2807SJeff Garzik { 3029c6fd2807SJeff Garzik struct ata_ioports *ioaddr = &ap->ioaddr; 3030c6fd2807SJeff Garzik unsigned int dev0 = devmask & (1 << 0); 3031c6fd2807SJeff Garzik unsigned int dev1 = devmask & (1 << 1); 30329b89391cSTejun Heo int rc, ret = 0; 3033c6fd2807SJeff Garzik 3034c6fd2807SJeff Garzik /* if device 0 was found in ata_devchk, wait for its 3035c6fd2807SJeff Garzik * BSY bit to clear 3036c6fd2807SJeff Garzik */ 3037d4b2bab4STejun Heo if (dev0) { 3038d4b2bab4STejun Heo rc = ata_wait_ready(ap, deadline); 30399b89391cSTejun Heo if (rc) { 30409b89391cSTejun Heo if (rc != -ENODEV) 3041d4b2bab4STejun Heo return rc; 30429b89391cSTejun Heo ret = rc; 30439b89391cSTejun Heo } 3044d4b2bab4STejun Heo } 3045c6fd2807SJeff Garzik 3046e141d999STejun Heo /* if device 1 was found in ata_devchk, wait for register 3047e141d999STejun Heo * access briefly, then wait for BSY to clear. 3048c6fd2807SJeff Garzik */ 3049e141d999STejun Heo if (dev1) { 3050e141d999STejun Heo int i; 3051c6fd2807SJeff Garzik 3052c6fd2807SJeff Garzik ap->ops->dev_select(ap, 1); 3053e141d999STejun Heo 3054e141d999STejun Heo /* Wait for register access. Some ATAPI devices fail 3055e141d999STejun Heo * to set nsect/lbal after reset, so don't waste too 3056e141d999STejun Heo * much time on it. We're gonna wait for !BSY anyway. 3057e141d999STejun Heo */ 3058e141d999STejun Heo for (i = 0; i < 2; i++) { 3059e141d999STejun Heo u8 nsect, lbal; 3060e141d999STejun Heo 30610d5ff566STejun Heo nsect = ioread8(ioaddr->nsect_addr); 30620d5ff566STejun Heo lbal = ioread8(ioaddr->lbal_addr); 3063c6fd2807SJeff Garzik if ((nsect == 1) && (lbal == 1)) 3064c6fd2807SJeff Garzik break; 3065c6fd2807SJeff Garzik msleep(50); /* give drive a breather */ 3066c6fd2807SJeff Garzik } 3067e141d999STejun Heo 3068d4b2bab4STejun Heo rc = ata_wait_ready(ap, deadline); 30699b89391cSTejun Heo if (rc) { 30709b89391cSTejun Heo if (rc != -ENODEV) 3071d4b2bab4STejun Heo return rc; 30729b89391cSTejun Heo ret = rc; 30739b89391cSTejun Heo } 3074d4b2bab4STejun Heo } 3075c6fd2807SJeff Garzik 3076c6fd2807SJeff Garzik /* is all this really necessary? */ 3077c6fd2807SJeff Garzik ap->ops->dev_select(ap, 0); 3078c6fd2807SJeff Garzik if (dev1) 3079c6fd2807SJeff Garzik ap->ops->dev_select(ap, 1); 3080c6fd2807SJeff Garzik if (dev0) 3081c6fd2807SJeff Garzik ap->ops->dev_select(ap, 0); 3082d4b2bab4STejun Heo 30839b89391cSTejun Heo return ret; 3084c6fd2807SJeff Garzik } 3085c6fd2807SJeff Garzik 3086d4b2bab4STejun Heo static int ata_bus_softreset(struct ata_port *ap, unsigned int devmask, 3087d4b2bab4STejun Heo unsigned long deadline) 3088c6fd2807SJeff Garzik { 3089c6fd2807SJeff Garzik struct ata_ioports *ioaddr = &ap->ioaddr; 3090c6fd2807SJeff Garzik 309144877b4eSTejun Heo DPRINTK("ata%u: bus reset via SRST\n", ap->print_id); 3092c6fd2807SJeff Garzik 3093c6fd2807SJeff Garzik /* software reset. causes dev0 to be selected */ 30940d5ff566STejun Heo iowrite8(ap->ctl, ioaddr->ctl_addr); 3095c6fd2807SJeff Garzik udelay(20); /* FIXME: flush */ 30960d5ff566STejun Heo iowrite8(ap->ctl | ATA_SRST, ioaddr->ctl_addr); 3097c6fd2807SJeff Garzik udelay(20); /* FIXME: flush */ 30980d5ff566STejun Heo iowrite8(ap->ctl, ioaddr->ctl_addr); 3099c6fd2807SJeff Garzik 3100c6fd2807SJeff Garzik /* spec mandates ">= 2ms" before checking status. 3101c6fd2807SJeff Garzik * We wait 150ms, because that was the magic delay used for 3102c6fd2807SJeff Garzik * ATAPI devices in Hale Landis's ATADRVR, for the period of time 3103c6fd2807SJeff Garzik * between when the ATA command register is written, and then 3104c6fd2807SJeff Garzik * status is checked. Because waiting for "a while" before 3105c6fd2807SJeff Garzik * checking status is fine, post SRST, we perform this magic 3106c6fd2807SJeff Garzik * delay here as well. 3107c6fd2807SJeff Garzik * 3108c6fd2807SJeff Garzik * Old drivers/ide uses the 2mS rule and then waits for ready 3109c6fd2807SJeff Garzik */ 3110c6fd2807SJeff Garzik msleep(150); 3111c6fd2807SJeff Garzik 3112c6fd2807SJeff Garzik /* Before we perform post reset processing we want to see if 3113c6fd2807SJeff Garzik * the bus shows 0xFF because the odd clown forgets the D7 3114c6fd2807SJeff Garzik * pulldown resistor. 3115c6fd2807SJeff Garzik */ 3116d1adc1bbSTejun Heo if (ata_check_status(ap) == 0xFF) 31179b89391cSTejun Heo return -ENODEV; 3118c6fd2807SJeff Garzik 3119d4b2bab4STejun Heo return ata_bus_post_reset(ap, devmask, deadline); 3120c6fd2807SJeff Garzik } 3121c6fd2807SJeff Garzik 3122c6fd2807SJeff Garzik /** 3123c6fd2807SJeff Garzik * ata_bus_reset - reset host port and associated ATA channel 3124c6fd2807SJeff Garzik * @ap: port to reset 3125c6fd2807SJeff Garzik * 3126c6fd2807SJeff Garzik * This is typically the first time we actually start issuing 3127c6fd2807SJeff Garzik * commands to the ATA channel. We wait for BSY to clear, then 3128c6fd2807SJeff Garzik * issue EXECUTE DEVICE DIAGNOSTIC command, polling for its 3129c6fd2807SJeff Garzik * result. Determine what devices, if any, are on the channel 3130c6fd2807SJeff Garzik * by looking at the device 0/1 error register. Look at the signature 3131c6fd2807SJeff Garzik * stored in each device's taskfile registers, to determine if 3132c6fd2807SJeff Garzik * the device is ATA or ATAPI. 3133c6fd2807SJeff Garzik * 3134c6fd2807SJeff Garzik * LOCKING: 3135c6fd2807SJeff Garzik * PCI/etc. bus probe sem. 3136cca3974eSJeff Garzik * Obtains host lock. 3137c6fd2807SJeff Garzik * 3138c6fd2807SJeff Garzik * SIDE EFFECTS: 3139c6fd2807SJeff Garzik * Sets ATA_FLAG_DISABLED if bus reset fails. 3140c6fd2807SJeff Garzik */ 3141c6fd2807SJeff Garzik 3142c6fd2807SJeff Garzik void ata_bus_reset(struct ata_port *ap) 3143c6fd2807SJeff Garzik { 3144c6fd2807SJeff Garzik struct ata_ioports *ioaddr = &ap->ioaddr; 3145c6fd2807SJeff Garzik unsigned int slave_possible = ap->flags & ATA_FLAG_SLAVE_POSS; 3146c6fd2807SJeff Garzik u8 err; 3147c6fd2807SJeff Garzik unsigned int dev0, dev1 = 0, devmask = 0; 31489b89391cSTejun Heo int rc; 3149c6fd2807SJeff Garzik 315044877b4eSTejun Heo DPRINTK("ENTER, host %u, port %u\n", ap->print_id, ap->port_no); 3151c6fd2807SJeff Garzik 3152c6fd2807SJeff Garzik /* determine if device 0/1 are present */ 3153c6fd2807SJeff Garzik if (ap->flags & ATA_FLAG_SATA_RESET) 3154c6fd2807SJeff Garzik dev0 = 1; 3155c6fd2807SJeff Garzik else { 3156c6fd2807SJeff Garzik dev0 = ata_devchk(ap, 0); 3157c6fd2807SJeff Garzik if (slave_possible) 3158c6fd2807SJeff Garzik dev1 = ata_devchk(ap, 1); 3159c6fd2807SJeff Garzik } 3160c6fd2807SJeff Garzik 3161c6fd2807SJeff Garzik if (dev0) 3162c6fd2807SJeff Garzik devmask |= (1 << 0); 3163c6fd2807SJeff Garzik if (dev1) 3164c6fd2807SJeff Garzik devmask |= (1 << 1); 3165c6fd2807SJeff Garzik 3166c6fd2807SJeff Garzik /* select device 0 again */ 3167c6fd2807SJeff Garzik ap->ops->dev_select(ap, 0); 3168c6fd2807SJeff Garzik 3169c6fd2807SJeff Garzik /* issue bus reset */ 31709b89391cSTejun Heo if (ap->flags & ATA_FLAG_SRST) { 31719b89391cSTejun Heo rc = ata_bus_softreset(ap, devmask, jiffies + 40 * HZ); 31729b89391cSTejun Heo if (rc && rc != -ENODEV) 3173c6fd2807SJeff Garzik goto err_out; 31749b89391cSTejun Heo } 3175c6fd2807SJeff Garzik 3176c6fd2807SJeff Garzik /* 3177c6fd2807SJeff Garzik * determine by signature whether we have ATA or ATAPI devices 3178c6fd2807SJeff Garzik */ 3179c6fd2807SJeff Garzik ap->device[0].class = ata_dev_try_classify(ap, 0, &err); 3180c6fd2807SJeff Garzik if ((slave_possible) && (err != 0x81)) 3181c6fd2807SJeff Garzik ap->device[1].class = ata_dev_try_classify(ap, 1, &err); 3182c6fd2807SJeff Garzik 3183c6fd2807SJeff Garzik /* is double-select really necessary? */ 3184c6fd2807SJeff Garzik if (ap->device[1].class != ATA_DEV_NONE) 3185c6fd2807SJeff Garzik ap->ops->dev_select(ap, 1); 3186c6fd2807SJeff Garzik if (ap->device[0].class != ATA_DEV_NONE) 3187c6fd2807SJeff Garzik ap->ops->dev_select(ap, 0); 3188c6fd2807SJeff Garzik 3189c6fd2807SJeff Garzik /* if no devices were detected, disable this port */ 3190c6fd2807SJeff Garzik if ((ap->device[0].class == ATA_DEV_NONE) && 3191c6fd2807SJeff Garzik (ap->device[1].class == ATA_DEV_NONE)) 3192c6fd2807SJeff Garzik goto err_out; 3193c6fd2807SJeff Garzik 3194c6fd2807SJeff Garzik if (ap->flags & (ATA_FLAG_SATA_RESET | ATA_FLAG_SRST)) { 3195c6fd2807SJeff Garzik /* set up device control for ATA_FLAG_SATA_RESET */ 31960d5ff566STejun Heo iowrite8(ap->ctl, ioaddr->ctl_addr); 3197c6fd2807SJeff Garzik } 3198c6fd2807SJeff Garzik 3199c6fd2807SJeff Garzik DPRINTK("EXIT\n"); 3200c6fd2807SJeff Garzik return; 3201c6fd2807SJeff Garzik 3202c6fd2807SJeff Garzik err_out: 3203c6fd2807SJeff Garzik ata_port_printk(ap, KERN_ERR, "disabling port\n"); 3204c6fd2807SJeff Garzik ap->ops->port_disable(ap); 3205c6fd2807SJeff Garzik 3206c6fd2807SJeff Garzik DPRINTK("EXIT\n"); 3207c6fd2807SJeff Garzik } 3208c6fd2807SJeff Garzik 3209c6fd2807SJeff Garzik /** 3210c6fd2807SJeff Garzik * sata_phy_debounce - debounce SATA phy status 3211c6fd2807SJeff Garzik * @ap: ATA port to debounce SATA phy status for 3212c6fd2807SJeff Garzik * @params: timing parameters { interval, duratinon, timeout } in msec 3213d4b2bab4STejun Heo * @deadline: deadline jiffies for the operation 3214c6fd2807SJeff Garzik * 3215c6fd2807SJeff Garzik * Make sure SStatus of @ap reaches stable state, determined by 3216c6fd2807SJeff Garzik * holding the same value where DET is not 1 for @duration polled 3217c6fd2807SJeff Garzik * every @interval, before @timeout. Timeout constraints the 3218d4b2bab4STejun Heo * beginning of the stable state. Because DET gets stuck at 1 on 3219d4b2bab4STejun Heo * some controllers after hot unplugging, this functions waits 3220c6fd2807SJeff Garzik * until timeout then returns 0 if DET is stable at 1. 3221c6fd2807SJeff Garzik * 3222d4b2bab4STejun Heo * @timeout is further limited by @deadline. The sooner of the 3223d4b2bab4STejun Heo * two is used. 3224d4b2bab4STejun Heo * 3225c6fd2807SJeff Garzik * LOCKING: 3226c6fd2807SJeff Garzik * Kernel thread context (may sleep) 3227c6fd2807SJeff Garzik * 3228c6fd2807SJeff Garzik * RETURNS: 3229c6fd2807SJeff Garzik * 0 on success, -errno on failure. 3230c6fd2807SJeff Garzik */ 3231d4b2bab4STejun Heo int sata_phy_debounce(struct ata_port *ap, const unsigned long *params, 3232d4b2bab4STejun Heo unsigned long deadline) 3233c6fd2807SJeff Garzik { 3234c6fd2807SJeff Garzik unsigned long interval_msec = params[0]; 3235d4b2bab4STejun Heo unsigned long duration = msecs_to_jiffies(params[1]); 3236d4b2bab4STejun Heo unsigned long last_jiffies, t; 3237c6fd2807SJeff Garzik u32 last, cur; 3238c6fd2807SJeff Garzik int rc; 3239c6fd2807SJeff Garzik 3240d4b2bab4STejun Heo t = jiffies + msecs_to_jiffies(params[2]); 3241d4b2bab4STejun Heo if (time_before(t, deadline)) 3242d4b2bab4STejun Heo deadline = t; 3243d4b2bab4STejun Heo 3244c6fd2807SJeff Garzik if ((rc = sata_scr_read(ap, SCR_STATUS, &cur))) 3245c6fd2807SJeff Garzik return rc; 3246c6fd2807SJeff Garzik cur &= 0xf; 3247c6fd2807SJeff Garzik 3248c6fd2807SJeff Garzik last = cur; 3249c6fd2807SJeff Garzik last_jiffies = jiffies; 3250c6fd2807SJeff Garzik 3251c6fd2807SJeff Garzik while (1) { 3252c6fd2807SJeff Garzik msleep(interval_msec); 3253c6fd2807SJeff Garzik if ((rc = sata_scr_read(ap, SCR_STATUS, &cur))) 3254c6fd2807SJeff Garzik return rc; 3255c6fd2807SJeff Garzik cur &= 0xf; 3256c6fd2807SJeff Garzik 3257c6fd2807SJeff Garzik /* DET stable? */ 3258c6fd2807SJeff Garzik if (cur == last) { 3259d4b2bab4STejun Heo if (cur == 1 && time_before(jiffies, deadline)) 3260c6fd2807SJeff Garzik continue; 3261c6fd2807SJeff Garzik if (time_after(jiffies, last_jiffies + duration)) 3262c6fd2807SJeff Garzik return 0; 3263c6fd2807SJeff Garzik continue; 3264c6fd2807SJeff Garzik } 3265c6fd2807SJeff Garzik 3266c6fd2807SJeff Garzik /* unstable, start over */ 3267c6fd2807SJeff Garzik last = cur; 3268c6fd2807SJeff Garzik last_jiffies = jiffies; 3269c6fd2807SJeff Garzik 3270f1545154STejun Heo /* Check deadline. If debouncing failed, return 3271f1545154STejun Heo * -EPIPE to tell upper layer to lower link speed. 3272f1545154STejun Heo */ 3273d4b2bab4STejun Heo if (time_after(jiffies, deadline)) 3274f1545154STejun Heo return -EPIPE; 3275c6fd2807SJeff Garzik } 3276c6fd2807SJeff Garzik } 3277c6fd2807SJeff Garzik 3278c6fd2807SJeff Garzik /** 3279c6fd2807SJeff Garzik * sata_phy_resume - resume SATA phy 3280c6fd2807SJeff Garzik * @ap: ATA port to resume SATA phy for 3281c6fd2807SJeff Garzik * @params: timing parameters { interval, duratinon, timeout } in msec 3282d4b2bab4STejun Heo * @deadline: deadline jiffies for the operation 3283c6fd2807SJeff Garzik * 3284c6fd2807SJeff Garzik * Resume SATA phy of @ap and debounce it. 3285c6fd2807SJeff Garzik * 3286c6fd2807SJeff Garzik * LOCKING: 3287c6fd2807SJeff Garzik * Kernel thread context (may sleep) 3288c6fd2807SJeff Garzik * 3289c6fd2807SJeff Garzik * RETURNS: 3290c6fd2807SJeff Garzik * 0 on success, -errno on failure. 3291c6fd2807SJeff Garzik */ 3292d4b2bab4STejun Heo int sata_phy_resume(struct ata_port *ap, const unsigned long *params, 3293d4b2bab4STejun Heo unsigned long deadline) 3294c6fd2807SJeff Garzik { 3295c6fd2807SJeff Garzik u32 scontrol; 3296c6fd2807SJeff Garzik int rc; 3297c6fd2807SJeff Garzik 3298c6fd2807SJeff Garzik if ((rc = sata_scr_read(ap, SCR_CONTROL, &scontrol))) 3299c6fd2807SJeff Garzik return rc; 3300c6fd2807SJeff Garzik 3301c6fd2807SJeff Garzik scontrol = (scontrol & 0x0f0) | 0x300; 3302c6fd2807SJeff Garzik 3303c6fd2807SJeff Garzik if ((rc = sata_scr_write(ap, SCR_CONTROL, scontrol))) 3304c6fd2807SJeff Garzik return rc; 3305c6fd2807SJeff Garzik 3306c6fd2807SJeff Garzik /* Some PHYs react badly if SStatus is pounded immediately 3307c6fd2807SJeff Garzik * after resuming. Delay 200ms before debouncing. 3308c6fd2807SJeff Garzik */ 3309c6fd2807SJeff Garzik msleep(200); 3310c6fd2807SJeff Garzik 3311d4b2bab4STejun Heo return sata_phy_debounce(ap, params, deadline); 3312c6fd2807SJeff Garzik } 3313c6fd2807SJeff Garzik 3314c6fd2807SJeff Garzik /** 3315c6fd2807SJeff Garzik * ata_std_prereset - prepare for reset 3316c6fd2807SJeff Garzik * @ap: ATA port to be reset 3317d4b2bab4STejun Heo * @deadline: deadline jiffies for the operation 3318c6fd2807SJeff Garzik * 3319b8cffc6aSTejun Heo * @ap is about to be reset. Initialize it. Failure from 3320b8cffc6aSTejun Heo * prereset makes libata abort whole reset sequence and give up 3321b8cffc6aSTejun Heo * that port, so prereset should be best-effort. It does its 3322b8cffc6aSTejun Heo * best to prepare for reset sequence but if things go wrong, it 3323b8cffc6aSTejun Heo * should just whine, not fail. 3324c6fd2807SJeff Garzik * 3325c6fd2807SJeff Garzik * LOCKING: 3326c6fd2807SJeff Garzik * Kernel thread context (may sleep) 3327c6fd2807SJeff Garzik * 3328c6fd2807SJeff Garzik * RETURNS: 3329c6fd2807SJeff Garzik * 0 on success, -errno otherwise. 3330c6fd2807SJeff Garzik */ 3331d4b2bab4STejun Heo int ata_std_prereset(struct ata_port *ap, unsigned long deadline) 3332c6fd2807SJeff Garzik { 3333c6fd2807SJeff Garzik struct ata_eh_context *ehc = &ap->eh_context; 3334c6fd2807SJeff Garzik const unsigned long *timing = sata_ehc_deb_timing(ehc); 3335c6fd2807SJeff Garzik int rc; 3336c6fd2807SJeff Garzik 333731daabdaSTejun Heo /* handle link resume */ 3338c6fd2807SJeff Garzik if ((ehc->i.flags & ATA_EHI_RESUME_LINK) && 3339c6fd2807SJeff Garzik (ap->flags & ATA_FLAG_HRST_TO_RESUME)) 3340c6fd2807SJeff Garzik ehc->i.action |= ATA_EH_HARDRESET; 3341c6fd2807SJeff Garzik 3342c6fd2807SJeff Garzik /* if we're about to do hardreset, nothing more to do */ 3343c6fd2807SJeff Garzik if (ehc->i.action & ATA_EH_HARDRESET) 3344c6fd2807SJeff Garzik return 0; 3345c6fd2807SJeff Garzik 3346c6fd2807SJeff Garzik /* if SATA, resume phy */ 3347a16abc0bSTejun Heo if (ap->flags & ATA_FLAG_SATA) { 3348d4b2bab4STejun Heo rc = sata_phy_resume(ap, timing, deadline); 3349b8cffc6aSTejun Heo /* whine about phy resume failure but proceed */ 3350b8cffc6aSTejun Heo if (rc && rc != -EOPNOTSUPP) 3351c6fd2807SJeff Garzik ata_port_printk(ap, KERN_WARNING, "failed to resume " 3352c6fd2807SJeff Garzik "link for reset (errno=%d)\n", rc); 3353c6fd2807SJeff Garzik } 3354c6fd2807SJeff Garzik 3355c6fd2807SJeff Garzik /* Wait for !BSY if the controller can wait for the first D2H 3356c6fd2807SJeff Garzik * Reg FIS and we don't know that no device is attached. 3357c6fd2807SJeff Garzik */ 3358b8cffc6aSTejun Heo if (!(ap->flags & ATA_FLAG_SKIP_D2H_BSY) && !ata_port_offline(ap)) { 3359b8cffc6aSTejun Heo rc = ata_wait_ready(ap, deadline); 33606dffaf61STejun Heo if (rc && rc != -ENODEV) { 3361b8cffc6aSTejun Heo ata_port_printk(ap, KERN_WARNING, "device not ready " 3362b8cffc6aSTejun Heo "(errno=%d), forcing hardreset\n", rc); 3363b8cffc6aSTejun Heo ehc->i.action |= ATA_EH_HARDRESET; 3364b8cffc6aSTejun Heo } 3365b8cffc6aSTejun Heo } 3366c6fd2807SJeff Garzik 3367c6fd2807SJeff Garzik return 0; 3368c6fd2807SJeff Garzik } 3369c6fd2807SJeff Garzik 3370c6fd2807SJeff Garzik /** 3371c6fd2807SJeff Garzik * ata_std_softreset - reset host port via ATA SRST 3372c6fd2807SJeff Garzik * @ap: port to reset 3373c6fd2807SJeff Garzik * @classes: resulting classes of attached devices 3374d4b2bab4STejun Heo * @deadline: deadline jiffies for the operation 3375c6fd2807SJeff Garzik * 3376c6fd2807SJeff Garzik * Reset host port using ATA SRST. 3377c6fd2807SJeff Garzik * 3378c6fd2807SJeff Garzik * LOCKING: 3379c6fd2807SJeff Garzik * Kernel thread context (may sleep) 3380c6fd2807SJeff Garzik * 3381c6fd2807SJeff Garzik * RETURNS: 3382c6fd2807SJeff Garzik * 0 on success, -errno otherwise. 3383c6fd2807SJeff Garzik */ 3384d4b2bab4STejun Heo int ata_std_softreset(struct ata_port *ap, unsigned int *classes, 3385d4b2bab4STejun Heo unsigned long deadline) 3386c6fd2807SJeff Garzik { 3387c6fd2807SJeff Garzik unsigned int slave_possible = ap->flags & ATA_FLAG_SLAVE_POSS; 3388d4b2bab4STejun Heo unsigned int devmask = 0; 3389d4b2bab4STejun Heo int rc; 3390c6fd2807SJeff Garzik u8 err; 3391c6fd2807SJeff Garzik 3392c6fd2807SJeff Garzik DPRINTK("ENTER\n"); 3393c6fd2807SJeff Garzik 3394c6fd2807SJeff Garzik if (ata_port_offline(ap)) { 3395c6fd2807SJeff Garzik classes[0] = ATA_DEV_NONE; 3396c6fd2807SJeff Garzik goto out; 3397c6fd2807SJeff Garzik } 3398c6fd2807SJeff Garzik 3399c6fd2807SJeff Garzik /* determine if device 0/1 are present */ 3400c6fd2807SJeff Garzik if (ata_devchk(ap, 0)) 3401c6fd2807SJeff Garzik devmask |= (1 << 0); 3402c6fd2807SJeff Garzik if (slave_possible && ata_devchk(ap, 1)) 3403c6fd2807SJeff Garzik devmask |= (1 << 1); 3404c6fd2807SJeff Garzik 3405c6fd2807SJeff Garzik /* select device 0 again */ 3406c6fd2807SJeff Garzik ap->ops->dev_select(ap, 0); 3407c6fd2807SJeff Garzik 3408c6fd2807SJeff Garzik /* issue bus reset */ 3409c6fd2807SJeff Garzik DPRINTK("about to softreset, devmask=%x\n", devmask); 3410d4b2bab4STejun Heo rc = ata_bus_softreset(ap, devmask, deadline); 34119b89391cSTejun Heo /* if link is occupied, -ENODEV too is an error */ 34129b89391cSTejun Heo if (rc && (rc != -ENODEV || sata_scr_valid(ap))) { 3413d4b2bab4STejun Heo ata_port_printk(ap, KERN_ERR, "SRST failed (errno=%d)\n", rc); 3414d4b2bab4STejun Heo return rc; 3415c6fd2807SJeff Garzik } 3416c6fd2807SJeff Garzik 3417c6fd2807SJeff Garzik /* determine by signature whether we have ATA or ATAPI devices */ 3418c6fd2807SJeff Garzik classes[0] = ata_dev_try_classify(ap, 0, &err); 3419c6fd2807SJeff Garzik if (slave_possible && err != 0x81) 3420c6fd2807SJeff Garzik classes[1] = ata_dev_try_classify(ap, 1, &err); 3421c6fd2807SJeff Garzik 3422c6fd2807SJeff Garzik out: 3423c6fd2807SJeff Garzik DPRINTK("EXIT, classes[0]=%u [1]=%u\n", classes[0], classes[1]); 3424c6fd2807SJeff Garzik return 0; 3425c6fd2807SJeff Garzik } 3426c6fd2807SJeff Garzik 3427c6fd2807SJeff Garzik /** 3428b6103f6dSTejun Heo * sata_port_hardreset - reset port via SATA phy reset 3429c6fd2807SJeff Garzik * @ap: port to reset 3430b6103f6dSTejun Heo * @timing: timing parameters { interval, duratinon, timeout } in msec 3431d4b2bab4STejun Heo * @deadline: deadline jiffies for the operation 3432c6fd2807SJeff Garzik * 3433c6fd2807SJeff Garzik * SATA phy-reset host port using DET bits of SControl register. 3434c6fd2807SJeff Garzik * 3435c6fd2807SJeff Garzik * LOCKING: 3436c6fd2807SJeff Garzik * Kernel thread context (may sleep) 3437c6fd2807SJeff Garzik * 3438c6fd2807SJeff Garzik * RETURNS: 3439c6fd2807SJeff Garzik * 0 on success, -errno otherwise. 3440c6fd2807SJeff Garzik */ 3441d4b2bab4STejun Heo int sata_port_hardreset(struct ata_port *ap, const unsigned long *timing, 3442d4b2bab4STejun Heo unsigned long deadline) 3443c6fd2807SJeff Garzik { 3444c6fd2807SJeff Garzik u32 scontrol; 3445c6fd2807SJeff Garzik int rc; 3446c6fd2807SJeff Garzik 3447c6fd2807SJeff Garzik DPRINTK("ENTER\n"); 3448c6fd2807SJeff Garzik 3449c6fd2807SJeff Garzik if (sata_set_spd_needed(ap)) { 3450c6fd2807SJeff Garzik /* SATA spec says nothing about how to reconfigure 3451c6fd2807SJeff Garzik * spd. To be on the safe side, turn off phy during 3452c6fd2807SJeff Garzik * reconfiguration. This works for at least ICH7 AHCI 3453c6fd2807SJeff Garzik * and Sil3124. 3454c6fd2807SJeff Garzik */ 3455c6fd2807SJeff Garzik if ((rc = sata_scr_read(ap, SCR_CONTROL, &scontrol))) 3456b6103f6dSTejun Heo goto out; 3457c6fd2807SJeff Garzik 3458cea0d336SJeff Garzik scontrol = (scontrol & 0x0f0) | 0x304; 3459c6fd2807SJeff Garzik 3460c6fd2807SJeff Garzik if ((rc = sata_scr_write(ap, SCR_CONTROL, scontrol))) 3461b6103f6dSTejun Heo goto out; 3462c6fd2807SJeff Garzik 3463c6fd2807SJeff Garzik sata_set_spd(ap); 3464c6fd2807SJeff Garzik } 3465c6fd2807SJeff Garzik 3466c6fd2807SJeff Garzik /* issue phy wake/reset */ 3467c6fd2807SJeff Garzik if ((rc = sata_scr_read(ap, SCR_CONTROL, &scontrol))) 3468b6103f6dSTejun Heo goto out; 3469c6fd2807SJeff Garzik 3470c6fd2807SJeff Garzik scontrol = (scontrol & 0x0f0) | 0x301; 3471c6fd2807SJeff Garzik 3472c6fd2807SJeff Garzik if ((rc = sata_scr_write_flush(ap, SCR_CONTROL, scontrol))) 3473b6103f6dSTejun Heo goto out; 3474c6fd2807SJeff Garzik 3475c6fd2807SJeff Garzik /* Couldn't find anything in SATA I/II specs, but AHCI-1.1 3476c6fd2807SJeff Garzik * 10.4.2 says at least 1 ms. 3477c6fd2807SJeff Garzik */ 3478c6fd2807SJeff Garzik msleep(1); 3479c6fd2807SJeff Garzik 3480c6fd2807SJeff Garzik /* bring phy back */ 3481d4b2bab4STejun Heo rc = sata_phy_resume(ap, timing, deadline); 3482b6103f6dSTejun Heo out: 3483b6103f6dSTejun Heo DPRINTK("EXIT, rc=%d\n", rc); 3484b6103f6dSTejun Heo return rc; 3485b6103f6dSTejun Heo } 3486b6103f6dSTejun Heo 3487b6103f6dSTejun Heo /** 3488b6103f6dSTejun Heo * sata_std_hardreset - reset host port via SATA phy reset 3489b6103f6dSTejun Heo * @ap: port to reset 3490b6103f6dSTejun Heo * @class: resulting class of attached device 3491d4b2bab4STejun Heo * @deadline: deadline jiffies for the operation 3492b6103f6dSTejun Heo * 3493b6103f6dSTejun Heo * SATA phy-reset host port using DET bits of SControl register, 3494b6103f6dSTejun Heo * wait for !BSY and classify the attached device. 3495b6103f6dSTejun Heo * 3496b6103f6dSTejun Heo * LOCKING: 3497b6103f6dSTejun Heo * Kernel thread context (may sleep) 3498b6103f6dSTejun Heo * 3499b6103f6dSTejun Heo * RETURNS: 3500b6103f6dSTejun Heo * 0 on success, -errno otherwise. 3501b6103f6dSTejun Heo */ 3502d4b2bab4STejun Heo int sata_std_hardreset(struct ata_port *ap, unsigned int *class, 3503d4b2bab4STejun Heo unsigned long deadline) 3504b6103f6dSTejun Heo { 3505b6103f6dSTejun Heo const unsigned long *timing = sata_ehc_deb_timing(&ap->eh_context); 3506b6103f6dSTejun Heo int rc; 3507b6103f6dSTejun Heo 3508b6103f6dSTejun Heo DPRINTK("ENTER\n"); 3509b6103f6dSTejun Heo 3510b6103f6dSTejun Heo /* do hardreset */ 3511d4b2bab4STejun Heo rc = sata_port_hardreset(ap, timing, deadline); 3512b6103f6dSTejun Heo if (rc) { 3513b6103f6dSTejun Heo ata_port_printk(ap, KERN_ERR, 3514b6103f6dSTejun Heo "COMRESET failed (errno=%d)\n", rc); 3515b6103f6dSTejun Heo return rc; 3516b6103f6dSTejun Heo } 3517c6fd2807SJeff Garzik 3518c6fd2807SJeff Garzik /* TODO: phy layer with polling, timeouts, etc. */ 3519c6fd2807SJeff Garzik if (ata_port_offline(ap)) { 3520c6fd2807SJeff Garzik *class = ATA_DEV_NONE; 3521c6fd2807SJeff Garzik DPRINTK("EXIT, link offline\n"); 3522c6fd2807SJeff Garzik return 0; 3523c6fd2807SJeff Garzik } 3524c6fd2807SJeff Garzik 352534fee227STejun Heo /* wait a while before checking status, see SRST for more info */ 352634fee227STejun Heo msleep(150); 352734fee227STejun Heo 3528d4b2bab4STejun Heo rc = ata_wait_ready(ap, deadline); 35299b89391cSTejun Heo /* link occupied, -ENODEV too is an error */ 35309b89391cSTejun Heo if (rc) { 3531c6fd2807SJeff Garzik ata_port_printk(ap, KERN_ERR, 3532d4b2bab4STejun Heo "COMRESET failed (errno=%d)\n", rc); 3533d4b2bab4STejun Heo return rc; 3534c6fd2807SJeff Garzik } 3535c6fd2807SJeff Garzik 3536c6fd2807SJeff Garzik ap->ops->dev_select(ap, 0); /* probably unnecessary */ 3537c6fd2807SJeff Garzik 3538c6fd2807SJeff Garzik *class = ata_dev_try_classify(ap, 0, NULL); 3539c6fd2807SJeff Garzik 3540c6fd2807SJeff Garzik DPRINTK("EXIT, class=%u\n", *class); 3541c6fd2807SJeff Garzik return 0; 3542c6fd2807SJeff Garzik } 3543c6fd2807SJeff Garzik 3544c6fd2807SJeff Garzik /** 3545c6fd2807SJeff Garzik * ata_std_postreset - standard postreset callback 3546c6fd2807SJeff Garzik * @ap: the target ata_port 3547c6fd2807SJeff Garzik * @classes: classes of attached devices 3548c6fd2807SJeff Garzik * 3549c6fd2807SJeff Garzik * This function is invoked after a successful reset. Note that 3550c6fd2807SJeff Garzik * the device might have been reset more than once using 3551c6fd2807SJeff Garzik * different reset methods before postreset is invoked. 3552c6fd2807SJeff Garzik * 3553c6fd2807SJeff Garzik * LOCKING: 3554c6fd2807SJeff Garzik * Kernel thread context (may sleep) 3555c6fd2807SJeff Garzik */ 3556c6fd2807SJeff Garzik void ata_std_postreset(struct ata_port *ap, unsigned int *classes) 3557c6fd2807SJeff Garzik { 3558c6fd2807SJeff Garzik u32 serror; 3559c6fd2807SJeff Garzik 3560c6fd2807SJeff Garzik DPRINTK("ENTER\n"); 3561c6fd2807SJeff Garzik 3562c6fd2807SJeff Garzik /* print link status */ 3563c6fd2807SJeff Garzik sata_print_link_status(ap); 3564c6fd2807SJeff Garzik 3565c6fd2807SJeff Garzik /* clear SError */ 3566c6fd2807SJeff Garzik if (sata_scr_read(ap, SCR_ERROR, &serror) == 0) 3567c6fd2807SJeff Garzik sata_scr_write(ap, SCR_ERROR, serror); 3568c6fd2807SJeff Garzik 3569c6fd2807SJeff Garzik /* is double-select really necessary? */ 3570c6fd2807SJeff Garzik if (classes[0] != ATA_DEV_NONE) 3571c6fd2807SJeff Garzik ap->ops->dev_select(ap, 1); 3572c6fd2807SJeff Garzik if (classes[1] != ATA_DEV_NONE) 3573c6fd2807SJeff Garzik ap->ops->dev_select(ap, 0); 3574c6fd2807SJeff Garzik 3575c6fd2807SJeff Garzik /* bail out if no device is present */ 3576c6fd2807SJeff Garzik if (classes[0] == ATA_DEV_NONE && classes[1] == ATA_DEV_NONE) { 3577c6fd2807SJeff Garzik DPRINTK("EXIT, no device\n"); 3578c6fd2807SJeff Garzik return; 3579c6fd2807SJeff Garzik } 3580c6fd2807SJeff Garzik 3581c6fd2807SJeff Garzik /* set up device control */ 35820d5ff566STejun Heo if (ap->ioaddr.ctl_addr) 35830d5ff566STejun Heo iowrite8(ap->ctl, ap->ioaddr.ctl_addr); 3584c6fd2807SJeff Garzik 3585c6fd2807SJeff Garzik DPRINTK("EXIT\n"); 3586c6fd2807SJeff Garzik } 3587c6fd2807SJeff Garzik 3588c6fd2807SJeff Garzik /** 3589c6fd2807SJeff Garzik * ata_dev_same_device - Determine whether new ID matches configured device 3590c6fd2807SJeff Garzik * @dev: device to compare against 3591c6fd2807SJeff Garzik * @new_class: class of the new device 3592c6fd2807SJeff Garzik * @new_id: IDENTIFY page of the new device 3593c6fd2807SJeff Garzik * 3594c6fd2807SJeff Garzik * Compare @new_class and @new_id against @dev and determine 3595c6fd2807SJeff Garzik * whether @dev is the device indicated by @new_class and 3596c6fd2807SJeff Garzik * @new_id. 3597c6fd2807SJeff Garzik * 3598c6fd2807SJeff Garzik * LOCKING: 3599c6fd2807SJeff Garzik * None. 3600c6fd2807SJeff Garzik * 3601c6fd2807SJeff Garzik * RETURNS: 3602c6fd2807SJeff Garzik * 1 if @dev matches @new_class and @new_id, 0 otherwise. 3603c6fd2807SJeff Garzik */ 3604c6fd2807SJeff Garzik static int ata_dev_same_device(struct ata_device *dev, unsigned int new_class, 3605c6fd2807SJeff Garzik const u16 *new_id) 3606c6fd2807SJeff Garzik { 3607c6fd2807SJeff Garzik const u16 *old_id = dev->id; 3608a0cf733bSTejun Heo unsigned char model[2][ATA_ID_PROD_LEN + 1]; 3609a0cf733bSTejun Heo unsigned char serial[2][ATA_ID_SERNO_LEN + 1]; 3610c6fd2807SJeff Garzik 3611c6fd2807SJeff Garzik if (dev->class != new_class) { 3612c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_INFO, "class mismatch %d != %d\n", 3613c6fd2807SJeff Garzik dev->class, new_class); 3614c6fd2807SJeff Garzik return 0; 3615c6fd2807SJeff Garzik } 3616c6fd2807SJeff Garzik 3617a0cf733bSTejun Heo ata_id_c_string(old_id, model[0], ATA_ID_PROD, sizeof(model[0])); 3618a0cf733bSTejun Heo ata_id_c_string(new_id, model[1], ATA_ID_PROD, sizeof(model[1])); 3619a0cf733bSTejun Heo ata_id_c_string(old_id, serial[0], ATA_ID_SERNO, sizeof(serial[0])); 3620a0cf733bSTejun Heo ata_id_c_string(new_id, serial[1], ATA_ID_SERNO, sizeof(serial[1])); 3621c6fd2807SJeff Garzik 3622c6fd2807SJeff Garzik if (strcmp(model[0], model[1])) { 3623c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_INFO, "model number mismatch " 3624c6fd2807SJeff Garzik "'%s' != '%s'\n", model[0], model[1]); 3625c6fd2807SJeff Garzik return 0; 3626c6fd2807SJeff Garzik } 3627c6fd2807SJeff Garzik 3628c6fd2807SJeff Garzik if (strcmp(serial[0], serial[1])) { 3629c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_INFO, "serial number mismatch " 3630c6fd2807SJeff Garzik "'%s' != '%s'\n", serial[0], serial[1]); 3631c6fd2807SJeff Garzik return 0; 3632c6fd2807SJeff Garzik } 3633c6fd2807SJeff Garzik 3634c6fd2807SJeff Garzik return 1; 3635c6fd2807SJeff Garzik } 3636c6fd2807SJeff Garzik 3637c6fd2807SJeff Garzik /** 3638fe30911bSTejun Heo * ata_dev_reread_id - Re-read IDENTIFY data 36393fae450cSHenrik Kretzschmar * @dev: target ATA device 3640bff04647STejun Heo * @readid_flags: read ID flags 3641c6fd2807SJeff Garzik * 3642c6fd2807SJeff Garzik * Re-read IDENTIFY page and make sure @dev is still attached to 3643c6fd2807SJeff Garzik * the port. 3644c6fd2807SJeff Garzik * 3645c6fd2807SJeff Garzik * LOCKING: 3646c6fd2807SJeff Garzik * Kernel thread context (may sleep) 3647c6fd2807SJeff Garzik * 3648c6fd2807SJeff Garzik * RETURNS: 3649c6fd2807SJeff Garzik * 0 on success, negative errno otherwise 3650c6fd2807SJeff Garzik */ 3651fe30911bSTejun Heo int ata_dev_reread_id(struct ata_device *dev, unsigned int readid_flags) 3652c6fd2807SJeff Garzik { 3653c6fd2807SJeff Garzik unsigned int class = dev->class; 3654c6fd2807SJeff Garzik u16 *id = (void *)dev->ap->sector_buf; 3655c6fd2807SJeff Garzik int rc; 3656c6fd2807SJeff Garzik 3657c6fd2807SJeff Garzik /* read ID data */ 3658bff04647STejun Heo rc = ata_dev_read_id(dev, &class, readid_flags, id); 3659c6fd2807SJeff Garzik if (rc) 3660fe30911bSTejun Heo return rc; 3661c6fd2807SJeff Garzik 3662c6fd2807SJeff Garzik /* is the device still there? */ 3663fe30911bSTejun Heo if (!ata_dev_same_device(dev, class, id)) 3664fe30911bSTejun Heo return -ENODEV; 3665c6fd2807SJeff Garzik 3666c6fd2807SJeff Garzik memcpy(dev->id, id, sizeof(id[0]) * ATA_ID_WORDS); 3667fe30911bSTejun Heo return 0; 3668fe30911bSTejun Heo } 3669fe30911bSTejun Heo 3670fe30911bSTejun Heo /** 3671fe30911bSTejun Heo * ata_dev_revalidate - Revalidate ATA device 3672fe30911bSTejun Heo * @dev: device to revalidate 3673fe30911bSTejun Heo * @readid_flags: read ID flags 3674fe30911bSTejun Heo * 3675fe30911bSTejun Heo * Re-read IDENTIFY page, make sure @dev is still attached to the 3676fe30911bSTejun Heo * port and reconfigure it according to the new IDENTIFY page. 3677fe30911bSTejun Heo * 3678fe30911bSTejun Heo * LOCKING: 3679fe30911bSTejun Heo * Kernel thread context (may sleep) 3680fe30911bSTejun Heo * 3681fe30911bSTejun Heo * RETURNS: 3682fe30911bSTejun Heo * 0 on success, negative errno otherwise 3683fe30911bSTejun Heo */ 3684fe30911bSTejun Heo int ata_dev_revalidate(struct ata_device *dev, unsigned int readid_flags) 3685fe30911bSTejun Heo { 36866ddcd3b0STejun Heo u64 n_sectors = dev->n_sectors; 3687fe30911bSTejun Heo int rc; 3688fe30911bSTejun Heo 3689fe30911bSTejun Heo if (!ata_dev_enabled(dev)) 3690fe30911bSTejun Heo return -ENODEV; 3691fe30911bSTejun Heo 3692fe30911bSTejun Heo /* re-read ID */ 3693fe30911bSTejun Heo rc = ata_dev_reread_id(dev, readid_flags); 3694fe30911bSTejun Heo if (rc) 3695fe30911bSTejun Heo goto fail; 3696c6fd2807SJeff Garzik 3697c6fd2807SJeff Garzik /* configure device according to the new ID */ 3698efdaedc4STejun Heo rc = ata_dev_configure(dev); 36996ddcd3b0STejun Heo if (rc) 37006ddcd3b0STejun Heo goto fail; 37016ddcd3b0STejun Heo 37026ddcd3b0STejun Heo /* verify n_sectors hasn't changed */ 37036ddcd3b0STejun Heo if (dev->class == ATA_DEV_ATA && dev->n_sectors != n_sectors) { 37046ddcd3b0STejun Heo ata_dev_printk(dev, KERN_INFO, "n_sectors mismatch " 37056ddcd3b0STejun Heo "%llu != %llu\n", 37066ddcd3b0STejun Heo (unsigned long long)n_sectors, 37076ddcd3b0STejun Heo (unsigned long long)dev->n_sectors); 37086ddcd3b0STejun Heo rc = -ENODEV; 37096ddcd3b0STejun Heo goto fail; 37106ddcd3b0STejun Heo } 37116ddcd3b0STejun Heo 3712c6fd2807SJeff Garzik return 0; 3713c6fd2807SJeff Garzik 3714c6fd2807SJeff Garzik fail: 3715c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_ERR, "revalidation failed (errno=%d)\n", rc); 3716c6fd2807SJeff Garzik return rc; 3717c6fd2807SJeff Garzik } 3718c6fd2807SJeff Garzik 37196919a0a6SAlan Cox struct ata_blacklist_entry { 37206919a0a6SAlan Cox const char *model_num; 37216919a0a6SAlan Cox const char *model_rev; 37226919a0a6SAlan Cox unsigned long horkage; 37236919a0a6SAlan Cox }; 37246919a0a6SAlan Cox 37256919a0a6SAlan Cox static const struct ata_blacklist_entry ata_device_blacklist [] = { 37266919a0a6SAlan Cox /* Devices with DMA related problems under Linux */ 37276919a0a6SAlan Cox { "WDC AC11000H", NULL, ATA_HORKAGE_NODMA }, 37286919a0a6SAlan Cox { "WDC AC22100H", NULL, ATA_HORKAGE_NODMA }, 37296919a0a6SAlan Cox { "WDC AC32500H", NULL, ATA_HORKAGE_NODMA }, 37306919a0a6SAlan Cox { "WDC AC33100H", NULL, ATA_HORKAGE_NODMA }, 37316919a0a6SAlan Cox { "WDC AC31600H", NULL, ATA_HORKAGE_NODMA }, 37326919a0a6SAlan Cox { "WDC AC32100H", "24.09P07", ATA_HORKAGE_NODMA }, 37336919a0a6SAlan Cox { "WDC AC23200L", "21.10N21", ATA_HORKAGE_NODMA }, 37346919a0a6SAlan Cox { "Compaq CRD-8241B", NULL, ATA_HORKAGE_NODMA }, 37356919a0a6SAlan Cox { "CRD-8400B", NULL, ATA_HORKAGE_NODMA }, 37366919a0a6SAlan Cox { "CRD-8480B", NULL, ATA_HORKAGE_NODMA }, 37376919a0a6SAlan Cox { "CRD-8482B", NULL, ATA_HORKAGE_NODMA }, 37386919a0a6SAlan Cox { "CRD-84", NULL, ATA_HORKAGE_NODMA }, 37396919a0a6SAlan Cox { "SanDisk SDP3B", NULL, ATA_HORKAGE_NODMA }, 37406919a0a6SAlan Cox { "SanDisk SDP3B-64", NULL, ATA_HORKAGE_NODMA }, 37416919a0a6SAlan Cox { "SANYO CD-ROM CRD", NULL, ATA_HORKAGE_NODMA }, 37426919a0a6SAlan Cox { "HITACHI CDR-8", NULL, ATA_HORKAGE_NODMA }, 37436919a0a6SAlan Cox { "HITACHI CDR-8335", NULL, ATA_HORKAGE_NODMA }, 37446919a0a6SAlan Cox { "HITACHI CDR-8435", NULL, ATA_HORKAGE_NODMA }, 37456919a0a6SAlan Cox { "Toshiba CD-ROM XM-6202B", NULL, ATA_HORKAGE_NODMA }, 37466919a0a6SAlan Cox { "TOSHIBA CD-ROM XM-1702BC", NULL, ATA_HORKAGE_NODMA }, 37476919a0a6SAlan Cox { "CD-532E-A", NULL, ATA_HORKAGE_NODMA }, 37486919a0a6SAlan Cox { "E-IDE CD-ROM CR-840",NULL, ATA_HORKAGE_NODMA }, 37496919a0a6SAlan Cox { "CD-ROM Drive/F5A", NULL, ATA_HORKAGE_NODMA }, 37506919a0a6SAlan Cox { "WPI CDD-820", NULL, ATA_HORKAGE_NODMA }, 37516919a0a6SAlan Cox { "SAMSUNG CD-ROM SC-148C", NULL, ATA_HORKAGE_NODMA }, 37526919a0a6SAlan Cox { "SAMSUNG CD-ROM SC", NULL, ATA_HORKAGE_NODMA }, 37536919a0a6SAlan Cox { "ATAPI CD-ROM DRIVE 40X MAXIMUM",NULL,ATA_HORKAGE_NODMA }, 37546919a0a6SAlan Cox { "_NEC DV5800A", NULL, ATA_HORKAGE_NODMA }, 37556919a0a6SAlan Cox { "SAMSUNG CD-ROM SN-124","N001", ATA_HORKAGE_NODMA }, 375639f19886SDave Jones { "Seagate STT20000A", NULL, ATA_HORKAGE_NODMA }, 37575acd50f6STejun Heo { "IOMEGA ZIP 250 ATAPI", NULL, ATA_HORKAGE_NODMA }, /* temporary fix */ 375839ce7128STejun Heo { "IOMEGA ZIP 250 ATAPI Floppy", 375939ce7128STejun Heo NULL, ATA_HORKAGE_NODMA }, 37606919a0a6SAlan Cox 376118d6e9d5SAlbert Lee /* Weird ATAPI devices */ 376240a1d531STejun Heo { "TORiSAN DVD-ROM DRD-N216", NULL, ATA_HORKAGE_MAX_SEC_128 }, 376318d6e9d5SAlbert Lee 37646919a0a6SAlan Cox /* Devices we expect to fail diagnostics */ 37656919a0a6SAlan Cox 37666919a0a6SAlan Cox /* Devices where NCQ should be avoided */ 37676919a0a6SAlan Cox /* NCQ is slow */ 37686919a0a6SAlan Cox { "WDC WD740ADFD-00", NULL, ATA_HORKAGE_NONCQ }, 376909125ea6STejun Heo /* http://thread.gmane.org/gmane.linux.ide/14907 */ 377009125ea6STejun Heo { "FUJITSU MHT2060BH", NULL, ATA_HORKAGE_NONCQ }, 37717acfaf30SPaul Rolland /* NCQ is broken */ 37727acfaf30SPaul Rolland { "Maxtor 6L250S0", "BANC1G10", ATA_HORKAGE_NONCQ }, 3773e8361fc4SChuck Ebbert { "Maxtor 6B200M0", "BANC1BM0", ATA_HORKAGE_NONCQ }, 3774471e44b2SJeff Garzik { "Maxtor 6B200M0", "BANC1B10", ATA_HORKAGE_NONCQ }, 37752f8d90abSPrarit Bhargava { "HITACHI HDS7250SASUN500G 0621KTAWSD", "K2AOAJ0AHITACHI", 37762f8d90abSPrarit Bhargava ATA_HORKAGE_NONCQ }, 377796442925SJens Axboe /* NCQ hard hangs device under heavier load, needs hard power cycle */ 377896442925SJens Axboe { "Maxtor 6B250S0", "BANC1B70", ATA_HORKAGE_NONCQ }, 377936e337d0SRobert Hancock /* Blacklist entries taken from Silicon Image 3124/3132 378036e337d0SRobert Hancock Windows driver .inf file - also several Linux problem reports */ 378136e337d0SRobert Hancock { "HTS541060G9SA00", "MB3OC60D", ATA_HORKAGE_NONCQ, }, 378236e337d0SRobert Hancock { "HTS541080G9SA00", "MB4OC60D", ATA_HORKAGE_NONCQ, }, 378336e337d0SRobert Hancock { "HTS541010G9SA00", "MBZOC60D", ATA_HORKAGE_NONCQ, }, 3784bd9c5a39STejun Heo /* Drives which do spurious command completion */ 3785bd9c5a39STejun Heo { "HTS541680J9SA00", "SB2IC7EP", ATA_HORKAGE_NONCQ, }, 37862f8fcebbSTejun Heo { "HTS541612J9SA00", "SBDIC7JP", ATA_HORKAGE_NONCQ, }, 3787e14cbfa6STejun Heo { "Hitachi HTS541616J9SA00", "SB4OC70P", ATA_HORKAGE_NONCQ, }, 37882f8fcebbSTejun Heo { "WDC WD740ADFD-00NLR1", NULL, ATA_HORKAGE_NONCQ, }, 3789a520f261STejun Heo { "FUJITSU MHV2080BH", "00840028", ATA_HORKAGE_NONCQ, }, 37903fb6589cSTejun Heo { "ST9160821AS", "3.CLF", ATA_HORKAGE_NONCQ, }, 37916919a0a6SAlan Cox 37926919a0a6SAlan Cox /* Devices with NCQ limits */ 37936919a0a6SAlan Cox 37946919a0a6SAlan Cox /* End Marker */ 37956919a0a6SAlan Cox { } 3796c6fd2807SJeff Garzik }; 3797c6fd2807SJeff Garzik 379875683fe7STejun Heo static unsigned long ata_dev_blacklisted(const struct ata_device *dev) 3799c6fd2807SJeff Garzik { 38008bfa79fcSTejun Heo unsigned char model_num[ATA_ID_PROD_LEN + 1]; 38018bfa79fcSTejun Heo unsigned char model_rev[ATA_ID_FW_REV_LEN + 1]; 38026919a0a6SAlan Cox const struct ata_blacklist_entry *ad = ata_device_blacklist; 3803c6fd2807SJeff Garzik 38048bfa79fcSTejun Heo ata_id_c_string(dev->id, model_num, ATA_ID_PROD, sizeof(model_num)); 38058bfa79fcSTejun Heo ata_id_c_string(dev->id, model_rev, ATA_ID_FW_REV, sizeof(model_rev)); 3806c6fd2807SJeff Garzik 38076919a0a6SAlan Cox while (ad->model_num) { 38088bfa79fcSTejun Heo if (!strcmp(ad->model_num, model_num)) { 38096919a0a6SAlan Cox if (ad->model_rev == NULL) 38106919a0a6SAlan Cox return ad->horkage; 38118bfa79fcSTejun Heo if (!strcmp(ad->model_rev, model_rev)) 38126919a0a6SAlan Cox return ad->horkage; 3813c6fd2807SJeff Garzik } 38146919a0a6SAlan Cox ad++; 3815c6fd2807SJeff Garzik } 3816c6fd2807SJeff Garzik return 0; 3817c6fd2807SJeff Garzik } 3818c6fd2807SJeff Garzik 38196919a0a6SAlan Cox static int ata_dma_blacklisted(const struct ata_device *dev) 38206919a0a6SAlan Cox { 38216919a0a6SAlan Cox /* We don't support polling DMA. 38226919a0a6SAlan Cox * DMA blacklist those ATAPI devices with CDB-intr (and use PIO) 38236919a0a6SAlan Cox * if the LLDD handles only interrupts in the HSM_ST_LAST state. 38246919a0a6SAlan Cox */ 38256919a0a6SAlan Cox if ((dev->ap->flags & ATA_FLAG_PIO_POLLING) && 38266919a0a6SAlan Cox (dev->flags & ATA_DFLAG_CDB_INTR)) 38276919a0a6SAlan Cox return 1; 382875683fe7STejun Heo return (dev->horkage & ATA_HORKAGE_NODMA) ? 1 : 0; 38296919a0a6SAlan Cox } 38306919a0a6SAlan Cox 3831c6fd2807SJeff Garzik /** 3832c6fd2807SJeff Garzik * ata_dev_xfermask - Compute supported xfermask of the given device 3833c6fd2807SJeff Garzik * @dev: Device to compute xfermask for 3834c6fd2807SJeff Garzik * 3835c6fd2807SJeff Garzik * Compute supported xfermask of @dev and store it in 3836c6fd2807SJeff Garzik * dev->*_mask. This function is responsible for applying all 3837c6fd2807SJeff Garzik * known limits including host controller limits, device 3838c6fd2807SJeff Garzik * blacklist, etc... 3839c6fd2807SJeff Garzik * 3840c6fd2807SJeff Garzik * LOCKING: 3841c6fd2807SJeff Garzik * None. 3842c6fd2807SJeff Garzik */ 3843c6fd2807SJeff Garzik static void ata_dev_xfermask(struct ata_device *dev) 3844c6fd2807SJeff Garzik { 3845c6fd2807SJeff Garzik struct ata_port *ap = dev->ap; 3846cca3974eSJeff Garzik struct ata_host *host = ap->host; 3847c6fd2807SJeff Garzik unsigned long xfer_mask; 3848c6fd2807SJeff Garzik 3849c6fd2807SJeff Garzik /* controller modes available */ 3850c6fd2807SJeff Garzik xfer_mask = ata_pack_xfermask(ap->pio_mask, 3851c6fd2807SJeff Garzik ap->mwdma_mask, ap->udma_mask); 3852c6fd2807SJeff Garzik 38538343f889SRobert Hancock /* drive modes available */ 3854c6fd2807SJeff Garzik xfer_mask &= ata_pack_xfermask(dev->pio_mask, 3855c6fd2807SJeff Garzik dev->mwdma_mask, dev->udma_mask); 3856c6fd2807SJeff Garzik xfer_mask &= ata_id_xfermask(dev->id); 3857c6fd2807SJeff Garzik 3858b352e57dSAlan Cox /* 3859b352e57dSAlan Cox * CFA Advanced TrueIDE timings are not allowed on a shared 3860b352e57dSAlan Cox * cable 3861b352e57dSAlan Cox */ 3862b352e57dSAlan Cox if (ata_dev_pair(dev)) { 3863b352e57dSAlan Cox /* No PIO5 or PIO6 */ 3864b352e57dSAlan Cox xfer_mask &= ~(0x03 << (ATA_SHIFT_PIO + 5)); 3865b352e57dSAlan Cox /* No MWDMA3 or MWDMA 4 */ 3866b352e57dSAlan Cox xfer_mask &= ~(0x03 << (ATA_SHIFT_MWDMA + 3)); 3867b352e57dSAlan Cox } 3868b352e57dSAlan Cox 3869c6fd2807SJeff Garzik if (ata_dma_blacklisted(dev)) { 3870c6fd2807SJeff Garzik xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA); 3871c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_WARNING, 3872c6fd2807SJeff Garzik "device is on DMA blacklist, disabling DMA\n"); 3873c6fd2807SJeff Garzik } 3874c6fd2807SJeff Garzik 387514d66ab7SPetr Vandrovec if ((host->flags & ATA_HOST_SIMPLEX) && 387614d66ab7SPetr Vandrovec host->simplex_claimed && host->simplex_claimed != ap) { 3877c6fd2807SJeff Garzik xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA); 3878c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_WARNING, "simplex DMA is claimed by " 3879c6fd2807SJeff Garzik "other device, disabling DMA\n"); 3880c6fd2807SJeff Garzik } 3881c6fd2807SJeff Garzik 3882e424675fSJeff Garzik if (ap->flags & ATA_FLAG_NO_IORDY) 3883e424675fSJeff Garzik xfer_mask &= ata_pio_mask_no_iordy(dev); 3884e424675fSJeff Garzik 3885c6fd2807SJeff Garzik if (ap->ops->mode_filter) 3886a76b62caSAlan Cox xfer_mask = ap->ops->mode_filter(dev, xfer_mask); 3887c6fd2807SJeff Garzik 38888343f889SRobert Hancock /* Apply cable rule here. Don't apply it early because when 38898343f889SRobert Hancock * we handle hot plug the cable type can itself change. 38908343f889SRobert Hancock * Check this last so that we know if the transfer rate was 38918343f889SRobert Hancock * solely limited by the cable. 38928343f889SRobert Hancock * Unknown or 80 wire cables reported host side are checked 38938343f889SRobert Hancock * drive side as well. Cases where we know a 40wire cable 38948343f889SRobert Hancock * is used safely for 80 are not checked here. 38958343f889SRobert Hancock */ 38968343f889SRobert Hancock if (xfer_mask & (0xF8 << ATA_SHIFT_UDMA)) 38978343f889SRobert Hancock /* UDMA/44 or higher would be available */ 38988343f889SRobert Hancock if((ap->cbl == ATA_CBL_PATA40) || 38998343f889SRobert Hancock (ata_drive_40wire(dev->id) && 39008343f889SRobert Hancock (ap->cbl == ATA_CBL_PATA_UNK || 39018343f889SRobert Hancock ap->cbl == ATA_CBL_PATA80))) { 39028343f889SRobert Hancock ata_dev_printk(dev, KERN_WARNING, 39038343f889SRobert Hancock "limited to UDMA/33 due to 40-wire cable\n"); 39048343f889SRobert Hancock xfer_mask &= ~(0xF8 << ATA_SHIFT_UDMA); 39058343f889SRobert Hancock } 39068343f889SRobert Hancock 3907c6fd2807SJeff Garzik ata_unpack_xfermask(xfer_mask, &dev->pio_mask, 3908c6fd2807SJeff Garzik &dev->mwdma_mask, &dev->udma_mask); 3909c6fd2807SJeff Garzik } 3910c6fd2807SJeff Garzik 3911c6fd2807SJeff Garzik /** 3912c6fd2807SJeff Garzik * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command 3913c6fd2807SJeff Garzik * @dev: Device to which command will be sent 3914c6fd2807SJeff Garzik * 3915c6fd2807SJeff Garzik * Issue SET FEATURES - XFER MODE command to device @dev 3916c6fd2807SJeff Garzik * on port @ap. 3917c6fd2807SJeff Garzik * 3918c6fd2807SJeff Garzik * LOCKING: 3919c6fd2807SJeff Garzik * PCI/etc. bus probe sem. 3920c6fd2807SJeff Garzik * 3921c6fd2807SJeff Garzik * RETURNS: 3922c6fd2807SJeff Garzik * 0 on success, AC_ERR_* mask otherwise. 3923c6fd2807SJeff Garzik */ 3924c6fd2807SJeff Garzik 3925c6fd2807SJeff Garzik static unsigned int ata_dev_set_xfermode(struct ata_device *dev) 3926c6fd2807SJeff Garzik { 3927c6fd2807SJeff Garzik struct ata_taskfile tf; 3928c6fd2807SJeff Garzik unsigned int err_mask; 3929c6fd2807SJeff Garzik 3930c6fd2807SJeff Garzik /* set up set-features taskfile */ 3931c6fd2807SJeff Garzik DPRINTK("set features - xfer mode\n"); 3932c6fd2807SJeff Garzik 3933464cf177STejun Heo /* Some controllers and ATAPI devices show flaky interrupt 3934464cf177STejun Heo * behavior after setting xfer mode. Use polling instead. 3935464cf177STejun Heo */ 3936c6fd2807SJeff Garzik ata_tf_init(dev, &tf); 3937c6fd2807SJeff Garzik tf.command = ATA_CMD_SET_FEATURES; 3938c6fd2807SJeff Garzik tf.feature = SETFEATURES_XFER; 3939464cf177STejun Heo tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_POLLING; 3940c6fd2807SJeff Garzik tf.protocol = ATA_PROT_NODATA; 3941c6fd2807SJeff Garzik tf.nsect = dev->xfer_mode; 3942c6fd2807SJeff Garzik 3943c6fd2807SJeff Garzik err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0); 3944c6fd2807SJeff Garzik 3945c6fd2807SJeff Garzik DPRINTK("EXIT, err_mask=%x\n", err_mask); 3946c6fd2807SJeff Garzik return err_mask; 3947c6fd2807SJeff Garzik } 3948c6fd2807SJeff Garzik 3949c6fd2807SJeff Garzik /** 3950c6fd2807SJeff Garzik * ata_dev_init_params - Issue INIT DEV PARAMS command 3951c6fd2807SJeff Garzik * @dev: Device to which command will be sent 3952c6fd2807SJeff Garzik * @heads: Number of heads (taskfile parameter) 3953c6fd2807SJeff Garzik * @sectors: Number of sectors (taskfile parameter) 3954c6fd2807SJeff Garzik * 3955c6fd2807SJeff Garzik * LOCKING: 3956c6fd2807SJeff Garzik * Kernel thread context (may sleep) 3957c6fd2807SJeff Garzik * 3958c6fd2807SJeff Garzik * RETURNS: 3959c6fd2807SJeff Garzik * 0 on success, AC_ERR_* mask otherwise. 3960c6fd2807SJeff Garzik */ 3961c6fd2807SJeff Garzik static unsigned int ata_dev_init_params(struct ata_device *dev, 3962c6fd2807SJeff Garzik u16 heads, u16 sectors) 3963c6fd2807SJeff Garzik { 3964c6fd2807SJeff Garzik struct ata_taskfile tf; 3965c6fd2807SJeff Garzik unsigned int err_mask; 3966c6fd2807SJeff Garzik 3967c6fd2807SJeff Garzik /* Number of sectors per track 1-255. Number of heads 1-16 */ 3968c6fd2807SJeff Garzik if (sectors < 1 || sectors > 255 || heads < 1 || heads > 16) 3969c6fd2807SJeff Garzik return AC_ERR_INVALID; 3970c6fd2807SJeff Garzik 3971c6fd2807SJeff Garzik /* set up init dev params taskfile */ 3972c6fd2807SJeff Garzik DPRINTK("init dev params \n"); 3973c6fd2807SJeff Garzik 3974c6fd2807SJeff Garzik ata_tf_init(dev, &tf); 3975c6fd2807SJeff Garzik tf.command = ATA_CMD_INIT_DEV_PARAMS; 3976c6fd2807SJeff Garzik tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 3977c6fd2807SJeff Garzik tf.protocol = ATA_PROT_NODATA; 3978c6fd2807SJeff Garzik tf.nsect = sectors; 3979c6fd2807SJeff Garzik tf.device |= (heads - 1) & 0x0f; /* max head = num. of heads - 1 */ 3980c6fd2807SJeff Garzik 3981c6fd2807SJeff Garzik err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0); 3982c6fd2807SJeff Garzik 3983c6fd2807SJeff Garzik DPRINTK("EXIT, err_mask=%x\n", err_mask); 3984c6fd2807SJeff Garzik return err_mask; 3985c6fd2807SJeff Garzik } 3986c6fd2807SJeff Garzik 3987c6fd2807SJeff Garzik /** 3988c6fd2807SJeff Garzik * ata_sg_clean - Unmap DMA memory associated with command 3989c6fd2807SJeff Garzik * @qc: Command containing DMA memory to be released 3990c6fd2807SJeff Garzik * 3991c6fd2807SJeff Garzik * Unmap all mapped DMA memory associated with this command. 3992c6fd2807SJeff Garzik * 3993c6fd2807SJeff Garzik * LOCKING: 3994cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 3995c6fd2807SJeff Garzik */ 399670e6ad0cSTejun Heo void ata_sg_clean(struct ata_queued_cmd *qc) 3997c6fd2807SJeff Garzik { 3998c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 3999c6fd2807SJeff Garzik struct scatterlist *sg = qc->__sg; 4000c6fd2807SJeff Garzik int dir = qc->dma_dir; 4001c6fd2807SJeff Garzik void *pad_buf = NULL; 4002c6fd2807SJeff Garzik 4003c6fd2807SJeff Garzik WARN_ON(!(qc->flags & ATA_QCFLAG_DMAMAP)); 4004c6fd2807SJeff Garzik WARN_ON(sg == NULL); 4005c6fd2807SJeff Garzik 4006c6fd2807SJeff Garzik if (qc->flags & ATA_QCFLAG_SINGLE) 4007c6fd2807SJeff Garzik WARN_ON(qc->n_elem > 1); 4008c6fd2807SJeff Garzik 4009c6fd2807SJeff Garzik VPRINTK("unmapping %u sg elements\n", qc->n_elem); 4010c6fd2807SJeff Garzik 4011c6fd2807SJeff Garzik /* if we padded the buffer out to 32-bit bound, and data 4012c6fd2807SJeff Garzik * xfer direction is from-device, we must copy from the 4013c6fd2807SJeff Garzik * pad buffer back into the supplied buffer 4014c6fd2807SJeff Garzik */ 4015c6fd2807SJeff Garzik if (qc->pad_len && !(qc->tf.flags & ATA_TFLAG_WRITE)) 4016c6fd2807SJeff Garzik pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ); 4017c6fd2807SJeff Garzik 4018c6fd2807SJeff Garzik if (qc->flags & ATA_QCFLAG_SG) { 4019c6fd2807SJeff Garzik if (qc->n_elem) 4020c6fd2807SJeff Garzik dma_unmap_sg(ap->dev, sg, qc->n_elem, dir); 4021c6fd2807SJeff Garzik /* restore last sg */ 4022c6fd2807SJeff Garzik sg[qc->orig_n_elem - 1].length += qc->pad_len; 4023c6fd2807SJeff Garzik if (pad_buf) { 4024c6fd2807SJeff Garzik struct scatterlist *psg = &qc->pad_sgent; 4025c6fd2807SJeff Garzik void *addr = kmap_atomic(psg->page, KM_IRQ0); 4026c6fd2807SJeff Garzik memcpy(addr + psg->offset, pad_buf, qc->pad_len); 4027c6fd2807SJeff Garzik kunmap_atomic(addr, KM_IRQ0); 4028c6fd2807SJeff Garzik } 4029c6fd2807SJeff Garzik } else { 4030c6fd2807SJeff Garzik if (qc->n_elem) 4031c6fd2807SJeff Garzik dma_unmap_single(ap->dev, 4032c6fd2807SJeff Garzik sg_dma_address(&sg[0]), sg_dma_len(&sg[0]), 4033c6fd2807SJeff Garzik dir); 4034c6fd2807SJeff Garzik /* restore sg */ 4035c6fd2807SJeff Garzik sg->length += qc->pad_len; 4036c6fd2807SJeff Garzik if (pad_buf) 4037c6fd2807SJeff Garzik memcpy(qc->buf_virt + sg->length - qc->pad_len, 4038c6fd2807SJeff Garzik pad_buf, qc->pad_len); 4039c6fd2807SJeff Garzik } 4040c6fd2807SJeff Garzik 4041c6fd2807SJeff Garzik qc->flags &= ~ATA_QCFLAG_DMAMAP; 4042c6fd2807SJeff Garzik qc->__sg = NULL; 4043c6fd2807SJeff Garzik } 4044c6fd2807SJeff Garzik 4045c6fd2807SJeff Garzik /** 4046c6fd2807SJeff Garzik * ata_fill_sg - Fill PCI IDE PRD table 4047c6fd2807SJeff Garzik * @qc: Metadata associated with taskfile to be transferred 4048c6fd2807SJeff Garzik * 4049c6fd2807SJeff Garzik * Fill PCI IDE PRD (scatter-gather) table with segments 4050c6fd2807SJeff Garzik * associated with the current disk command. 4051c6fd2807SJeff Garzik * 4052c6fd2807SJeff Garzik * LOCKING: 4053cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 4054c6fd2807SJeff Garzik * 4055c6fd2807SJeff Garzik */ 4056c6fd2807SJeff Garzik static void ata_fill_sg(struct ata_queued_cmd *qc) 4057c6fd2807SJeff Garzik { 4058c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 4059c6fd2807SJeff Garzik struct scatterlist *sg; 4060c6fd2807SJeff Garzik unsigned int idx; 4061c6fd2807SJeff Garzik 4062c6fd2807SJeff Garzik WARN_ON(qc->__sg == NULL); 4063c6fd2807SJeff Garzik WARN_ON(qc->n_elem == 0 && qc->pad_len == 0); 4064c6fd2807SJeff Garzik 4065c6fd2807SJeff Garzik idx = 0; 4066c6fd2807SJeff Garzik ata_for_each_sg(sg, qc) { 4067c6fd2807SJeff Garzik u32 addr, offset; 4068c6fd2807SJeff Garzik u32 sg_len, len; 4069c6fd2807SJeff Garzik 4070c6fd2807SJeff Garzik /* determine if physical DMA addr spans 64K boundary. 4071c6fd2807SJeff Garzik * Note h/w doesn't support 64-bit, so we unconditionally 4072c6fd2807SJeff Garzik * truncate dma_addr_t to u32. 4073c6fd2807SJeff Garzik */ 4074c6fd2807SJeff Garzik addr = (u32) sg_dma_address(sg); 4075c6fd2807SJeff Garzik sg_len = sg_dma_len(sg); 4076c6fd2807SJeff Garzik 4077c6fd2807SJeff Garzik while (sg_len) { 4078c6fd2807SJeff Garzik offset = addr & 0xffff; 4079c6fd2807SJeff Garzik len = sg_len; 4080c6fd2807SJeff Garzik if ((offset + sg_len) > 0x10000) 4081c6fd2807SJeff Garzik len = 0x10000 - offset; 4082c6fd2807SJeff Garzik 4083c6fd2807SJeff Garzik ap->prd[idx].addr = cpu_to_le32(addr); 4084c6fd2807SJeff Garzik ap->prd[idx].flags_len = cpu_to_le32(len & 0xffff); 4085c6fd2807SJeff Garzik VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", idx, addr, len); 4086c6fd2807SJeff Garzik 4087c6fd2807SJeff Garzik idx++; 4088c6fd2807SJeff Garzik sg_len -= len; 4089c6fd2807SJeff Garzik addr += len; 4090c6fd2807SJeff Garzik } 4091c6fd2807SJeff Garzik } 4092c6fd2807SJeff Garzik 4093c6fd2807SJeff Garzik if (idx) 4094c6fd2807SJeff Garzik ap->prd[idx - 1].flags_len |= cpu_to_le32(ATA_PRD_EOT); 4095c6fd2807SJeff Garzik } 4096b9a4197eSTejun Heo 4097c6fd2807SJeff Garzik /** 4098d26fc955SAlan Cox * ata_fill_sg_dumb - Fill PCI IDE PRD table 4099d26fc955SAlan Cox * @qc: Metadata associated with taskfile to be transferred 4100d26fc955SAlan Cox * 4101d26fc955SAlan Cox * Fill PCI IDE PRD (scatter-gather) table with segments 4102d26fc955SAlan Cox * associated with the current disk command. Perform the fill 4103d26fc955SAlan Cox * so that we avoid writing any length 64K records for 4104d26fc955SAlan Cox * controllers that don't follow the spec. 4105d26fc955SAlan Cox * 4106d26fc955SAlan Cox * LOCKING: 4107d26fc955SAlan Cox * spin_lock_irqsave(host lock) 4108d26fc955SAlan Cox * 4109d26fc955SAlan Cox */ 4110d26fc955SAlan Cox static void ata_fill_sg_dumb(struct ata_queued_cmd *qc) 4111d26fc955SAlan Cox { 4112d26fc955SAlan Cox struct ata_port *ap = qc->ap; 4113d26fc955SAlan Cox struct scatterlist *sg; 4114d26fc955SAlan Cox unsigned int idx; 4115d26fc955SAlan Cox 4116d26fc955SAlan Cox WARN_ON(qc->__sg == NULL); 4117d26fc955SAlan Cox WARN_ON(qc->n_elem == 0 && qc->pad_len == 0); 4118d26fc955SAlan Cox 4119d26fc955SAlan Cox idx = 0; 4120d26fc955SAlan Cox ata_for_each_sg(sg, qc) { 4121d26fc955SAlan Cox u32 addr, offset; 4122d26fc955SAlan Cox u32 sg_len, len, blen; 4123d26fc955SAlan Cox 4124d26fc955SAlan Cox /* determine if physical DMA addr spans 64K boundary. 4125d26fc955SAlan Cox * Note h/w doesn't support 64-bit, so we unconditionally 4126d26fc955SAlan Cox * truncate dma_addr_t to u32. 4127d26fc955SAlan Cox */ 4128d26fc955SAlan Cox addr = (u32) sg_dma_address(sg); 4129d26fc955SAlan Cox sg_len = sg_dma_len(sg); 4130d26fc955SAlan Cox 4131d26fc955SAlan Cox while (sg_len) { 4132d26fc955SAlan Cox offset = addr & 0xffff; 4133d26fc955SAlan Cox len = sg_len; 4134d26fc955SAlan Cox if ((offset + sg_len) > 0x10000) 4135d26fc955SAlan Cox len = 0x10000 - offset; 4136d26fc955SAlan Cox 4137d26fc955SAlan Cox blen = len & 0xffff; 4138d26fc955SAlan Cox ap->prd[idx].addr = cpu_to_le32(addr); 4139d26fc955SAlan Cox if (blen == 0) { 4140d26fc955SAlan Cox /* Some PATA chipsets like the CS5530 can't 4141d26fc955SAlan Cox cope with 0x0000 meaning 64K as the spec says */ 4142d26fc955SAlan Cox ap->prd[idx].flags_len = cpu_to_le32(0x8000); 4143d26fc955SAlan Cox blen = 0x8000; 4144d26fc955SAlan Cox ap->prd[++idx].addr = cpu_to_le32(addr + 0x8000); 4145d26fc955SAlan Cox } 4146d26fc955SAlan Cox ap->prd[idx].flags_len = cpu_to_le32(blen); 4147d26fc955SAlan Cox VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", idx, addr, len); 4148d26fc955SAlan Cox 4149d26fc955SAlan Cox idx++; 4150d26fc955SAlan Cox sg_len -= len; 4151d26fc955SAlan Cox addr += len; 4152d26fc955SAlan Cox } 4153d26fc955SAlan Cox } 4154d26fc955SAlan Cox 4155d26fc955SAlan Cox if (idx) 4156d26fc955SAlan Cox ap->prd[idx - 1].flags_len |= cpu_to_le32(ATA_PRD_EOT); 4157d26fc955SAlan Cox } 4158d26fc955SAlan Cox 4159d26fc955SAlan Cox /** 4160c6fd2807SJeff Garzik * ata_check_atapi_dma - Check whether ATAPI DMA can be supported 4161c6fd2807SJeff Garzik * @qc: Metadata associated with taskfile to check 4162c6fd2807SJeff Garzik * 4163c6fd2807SJeff Garzik * Allow low-level driver to filter ATA PACKET commands, returning 4164c6fd2807SJeff Garzik * a status indicating whether or not it is OK to use DMA for the 4165c6fd2807SJeff Garzik * supplied PACKET command. 4166c6fd2807SJeff Garzik * 4167c6fd2807SJeff Garzik * LOCKING: 4168cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 4169c6fd2807SJeff Garzik * 4170c6fd2807SJeff Garzik * RETURNS: 0 when ATAPI DMA can be used 4171c6fd2807SJeff Garzik * nonzero otherwise 4172c6fd2807SJeff Garzik */ 4173c6fd2807SJeff Garzik int ata_check_atapi_dma(struct ata_queued_cmd *qc) 4174c6fd2807SJeff Garzik { 4175c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 4176c6fd2807SJeff Garzik 4177b9a4197eSTejun Heo /* Don't allow DMA if it isn't multiple of 16 bytes. Quite a 4178b9a4197eSTejun Heo * few ATAPI devices choke on such DMA requests. 4179b9a4197eSTejun Heo */ 4180b9a4197eSTejun Heo if (unlikely(qc->nbytes & 15)) 41816f23a31dSAlbert Lee return 1; 41826f23a31dSAlbert Lee 4183c6fd2807SJeff Garzik if (ap->ops->check_atapi_dma) 4184b9a4197eSTejun Heo return ap->ops->check_atapi_dma(qc); 4185c6fd2807SJeff Garzik 4186b9a4197eSTejun Heo return 0; 4187c6fd2807SJeff Garzik } 4188b9a4197eSTejun Heo 4189c6fd2807SJeff Garzik /** 4190c6fd2807SJeff Garzik * ata_qc_prep - Prepare taskfile for submission 4191c6fd2807SJeff Garzik * @qc: Metadata associated with taskfile to be prepared 4192c6fd2807SJeff Garzik * 4193c6fd2807SJeff Garzik * Prepare ATA taskfile for submission. 4194c6fd2807SJeff Garzik * 4195c6fd2807SJeff Garzik * LOCKING: 4196cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 4197c6fd2807SJeff Garzik */ 4198c6fd2807SJeff Garzik void ata_qc_prep(struct ata_queued_cmd *qc) 4199c6fd2807SJeff Garzik { 4200c6fd2807SJeff Garzik if (!(qc->flags & ATA_QCFLAG_DMAMAP)) 4201c6fd2807SJeff Garzik return; 4202c6fd2807SJeff Garzik 4203c6fd2807SJeff Garzik ata_fill_sg(qc); 4204c6fd2807SJeff Garzik } 4205c6fd2807SJeff Garzik 4206d26fc955SAlan Cox /** 4207d26fc955SAlan Cox * ata_dumb_qc_prep - Prepare taskfile for submission 4208d26fc955SAlan Cox * @qc: Metadata associated with taskfile to be prepared 4209d26fc955SAlan Cox * 4210d26fc955SAlan Cox * Prepare ATA taskfile for submission. 4211d26fc955SAlan Cox * 4212d26fc955SAlan Cox * LOCKING: 4213d26fc955SAlan Cox * spin_lock_irqsave(host lock) 4214d26fc955SAlan Cox */ 4215d26fc955SAlan Cox void ata_dumb_qc_prep(struct ata_queued_cmd *qc) 4216d26fc955SAlan Cox { 4217d26fc955SAlan Cox if (!(qc->flags & ATA_QCFLAG_DMAMAP)) 4218d26fc955SAlan Cox return; 4219d26fc955SAlan Cox 4220d26fc955SAlan Cox ata_fill_sg_dumb(qc); 4221d26fc955SAlan Cox } 4222d26fc955SAlan Cox 4223c6fd2807SJeff Garzik void ata_noop_qc_prep(struct ata_queued_cmd *qc) { } 4224c6fd2807SJeff Garzik 4225c6fd2807SJeff Garzik /** 4226c6fd2807SJeff Garzik * ata_sg_init_one - Associate command with memory buffer 4227c6fd2807SJeff Garzik * @qc: Command to be associated 4228c6fd2807SJeff Garzik * @buf: Memory buffer 4229c6fd2807SJeff Garzik * @buflen: Length of memory buffer, in bytes. 4230c6fd2807SJeff Garzik * 4231c6fd2807SJeff Garzik * Initialize the data-related elements of queued_cmd @qc 4232c6fd2807SJeff Garzik * to point to a single memory buffer, @buf of byte length @buflen. 4233c6fd2807SJeff Garzik * 4234c6fd2807SJeff Garzik * LOCKING: 4235cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 4236c6fd2807SJeff Garzik */ 4237c6fd2807SJeff Garzik 4238c6fd2807SJeff Garzik void ata_sg_init_one(struct ata_queued_cmd *qc, void *buf, unsigned int buflen) 4239c6fd2807SJeff Garzik { 4240c6fd2807SJeff Garzik qc->flags |= ATA_QCFLAG_SINGLE; 4241c6fd2807SJeff Garzik 4242c6fd2807SJeff Garzik qc->__sg = &qc->sgent; 4243c6fd2807SJeff Garzik qc->n_elem = 1; 4244c6fd2807SJeff Garzik qc->orig_n_elem = 1; 4245c6fd2807SJeff Garzik qc->buf_virt = buf; 4246c6fd2807SJeff Garzik qc->nbytes = buflen; 4247c6fd2807SJeff Garzik 424861c0596cSTejun Heo sg_init_one(&qc->sgent, buf, buflen); 4249c6fd2807SJeff Garzik } 4250c6fd2807SJeff Garzik 4251c6fd2807SJeff Garzik /** 4252c6fd2807SJeff Garzik * ata_sg_init - Associate command with scatter-gather table. 4253c6fd2807SJeff Garzik * @qc: Command to be associated 4254c6fd2807SJeff Garzik * @sg: Scatter-gather table. 4255c6fd2807SJeff Garzik * @n_elem: Number of elements in s/g table. 4256c6fd2807SJeff Garzik * 4257c6fd2807SJeff Garzik * Initialize the data-related elements of queued_cmd @qc 4258c6fd2807SJeff Garzik * to point to a scatter-gather table @sg, containing @n_elem 4259c6fd2807SJeff Garzik * elements. 4260c6fd2807SJeff Garzik * 4261c6fd2807SJeff Garzik * LOCKING: 4262cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 4263c6fd2807SJeff Garzik */ 4264c6fd2807SJeff Garzik 4265c6fd2807SJeff Garzik void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg, 4266c6fd2807SJeff Garzik unsigned int n_elem) 4267c6fd2807SJeff Garzik { 4268c6fd2807SJeff Garzik qc->flags |= ATA_QCFLAG_SG; 4269c6fd2807SJeff Garzik qc->__sg = sg; 4270c6fd2807SJeff Garzik qc->n_elem = n_elem; 4271c6fd2807SJeff Garzik qc->orig_n_elem = n_elem; 4272c6fd2807SJeff Garzik } 4273c6fd2807SJeff Garzik 4274c6fd2807SJeff Garzik /** 4275c6fd2807SJeff Garzik * ata_sg_setup_one - DMA-map the memory buffer associated with a command. 4276c6fd2807SJeff Garzik * @qc: Command with memory buffer to be mapped. 4277c6fd2807SJeff Garzik * 4278c6fd2807SJeff Garzik * DMA-map the memory buffer associated with queued_cmd @qc. 4279c6fd2807SJeff Garzik * 4280c6fd2807SJeff Garzik * LOCKING: 4281cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 4282c6fd2807SJeff Garzik * 4283c6fd2807SJeff Garzik * RETURNS: 4284c6fd2807SJeff Garzik * Zero on success, negative on error. 4285c6fd2807SJeff Garzik */ 4286c6fd2807SJeff Garzik 4287c6fd2807SJeff Garzik static int ata_sg_setup_one(struct ata_queued_cmd *qc) 4288c6fd2807SJeff Garzik { 4289c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 4290c6fd2807SJeff Garzik int dir = qc->dma_dir; 4291c6fd2807SJeff Garzik struct scatterlist *sg = qc->__sg; 4292c6fd2807SJeff Garzik dma_addr_t dma_address; 4293c6fd2807SJeff Garzik int trim_sg = 0; 4294c6fd2807SJeff Garzik 4295c6fd2807SJeff Garzik /* we must lengthen transfers to end on a 32-bit boundary */ 4296c6fd2807SJeff Garzik qc->pad_len = sg->length & 3; 4297c6fd2807SJeff Garzik if (qc->pad_len) { 4298c6fd2807SJeff Garzik void *pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ); 4299c6fd2807SJeff Garzik struct scatterlist *psg = &qc->pad_sgent; 4300c6fd2807SJeff Garzik 4301c6fd2807SJeff Garzik WARN_ON(qc->dev->class != ATA_DEV_ATAPI); 4302c6fd2807SJeff Garzik 4303c6fd2807SJeff Garzik memset(pad_buf, 0, ATA_DMA_PAD_SZ); 4304c6fd2807SJeff Garzik 4305c6fd2807SJeff Garzik if (qc->tf.flags & ATA_TFLAG_WRITE) 4306c6fd2807SJeff Garzik memcpy(pad_buf, qc->buf_virt + sg->length - qc->pad_len, 4307c6fd2807SJeff Garzik qc->pad_len); 4308c6fd2807SJeff Garzik 4309c6fd2807SJeff Garzik sg_dma_address(psg) = ap->pad_dma + (qc->tag * ATA_DMA_PAD_SZ); 4310c6fd2807SJeff Garzik sg_dma_len(psg) = ATA_DMA_PAD_SZ; 4311c6fd2807SJeff Garzik /* trim sg */ 4312c6fd2807SJeff Garzik sg->length -= qc->pad_len; 4313c6fd2807SJeff Garzik if (sg->length == 0) 4314c6fd2807SJeff Garzik trim_sg = 1; 4315c6fd2807SJeff Garzik 4316c6fd2807SJeff Garzik DPRINTK("padding done, sg->length=%u pad_len=%u\n", 4317c6fd2807SJeff Garzik sg->length, qc->pad_len); 4318c6fd2807SJeff Garzik } 4319c6fd2807SJeff Garzik 4320c6fd2807SJeff Garzik if (trim_sg) { 4321c6fd2807SJeff Garzik qc->n_elem--; 4322c6fd2807SJeff Garzik goto skip_map; 4323c6fd2807SJeff Garzik } 4324c6fd2807SJeff Garzik 4325c6fd2807SJeff Garzik dma_address = dma_map_single(ap->dev, qc->buf_virt, 4326c6fd2807SJeff Garzik sg->length, dir); 4327c6fd2807SJeff Garzik if (dma_mapping_error(dma_address)) { 4328c6fd2807SJeff Garzik /* restore sg */ 4329c6fd2807SJeff Garzik sg->length += qc->pad_len; 4330c6fd2807SJeff Garzik return -1; 4331c6fd2807SJeff Garzik } 4332c6fd2807SJeff Garzik 4333c6fd2807SJeff Garzik sg_dma_address(sg) = dma_address; 4334c6fd2807SJeff Garzik sg_dma_len(sg) = sg->length; 4335c6fd2807SJeff Garzik 4336c6fd2807SJeff Garzik skip_map: 4337c6fd2807SJeff Garzik DPRINTK("mapped buffer of %d bytes for %s\n", sg_dma_len(sg), 4338c6fd2807SJeff Garzik qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read"); 4339c6fd2807SJeff Garzik 4340c6fd2807SJeff Garzik return 0; 4341c6fd2807SJeff Garzik } 4342c6fd2807SJeff Garzik 4343c6fd2807SJeff Garzik /** 4344c6fd2807SJeff Garzik * ata_sg_setup - DMA-map the scatter-gather table associated with a command. 4345c6fd2807SJeff Garzik * @qc: Command with scatter-gather table to be mapped. 4346c6fd2807SJeff Garzik * 4347c6fd2807SJeff Garzik * DMA-map the scatter-gather table associated with queued_cmd @qc. 4348c6fd2807SJeff Garzik * 4349c6fd2807SJeff Garzik * LOCKING: 4350cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 4351c6fd2807SJeff Garzik * 4352c6fd2807SJeff Garzik * RETURNS: 4353c6fd2807SJeff Garzik * Zero on success, negative on error. 4354c6fd2807SJeff Garzik * 4355c6fd2807SJeff Garzik */ 4356c6fd2807SJeff Garzik 4357c6fd2807SJeff Garzik static int ata_sg_setup(struct ata_queued_cmd *qc) 4358c6fd2807SJeff Garzik { 4359c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 4360c6fd2807SJeff Garzik struct scatterlist *sg = qc->__sg; 4361c6fd2807SJeff Garzik struct scatterlist *lsg = &sg[qc->n_elem - 1]; 4362c6fd2807SJeff Garzik int n_elem, pre_n_elem, dir, trim_sg = 0; 4363c6fd2807SJeff Garzik 436444877b4eSTejun Heo VPRINTK("ENTER, ata%u\n", ap->print_id); 4365c6fd2807SJeff Garzik WARN_ON(!(qc->flags & ATA_QCFLAG_SG)); 4366c6fd2807SJeff Garzik 4367c6fd2807SJeff Garzik /* we must lengthen transfers to end on a 32-bit boundary */ 4368c6fd2807SJeff Garzik qc->pad_len = lsg->length & 3; 4369c6fd2807SJeff Garzik if (qc->pad_len) { 4370c6fd2807SJeff Garzik void *pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ); 4371c6fd2807SJeff Garzik struct scatterlist *psg = &qc->pad_sgent; 4372c6fd2807SJeff Garzik unsigned int offset; 4373c6fd2807SJeff Garzik 4374c6fd2807SJeff Garzik WARN_ON(qc->dev->class != ATA_DEV_ATAPI); 4375c6fd2807SJeff Garzik 4376c6fd2807SJeff Garzik memset(pad_buf, 0, ATA_DMA_PAD_SZ); 4377c6fd2807SJeff Garzik 4378c6fd2807SJeff Garzik /* 4379c6fd2807SJeff Garzik * psg->page/offset are used to copy to-be-written 4380c6fd2807SJeff Garzik * data in this function or read data in ata_sg_clean. 4381c6fd2807SJeff Garzik */ 4382c6fd2807SJeff Garzik offset = lsg->offset + lsg->length - qc->pad_len; 4383c6fd2807SJeff Garzik psg->page = nth_page(lsg->page, offset >> PAGE_SHIFT); 4384c6fd2807SJeff Garzik psg->offset = offset_in_page(offset); 4385c6fd2807SJeff Garzik 4386c6fd2807SJeff Garzik if (qc->tf.flags & ATA_TFLAG_WRITE) { 4387c6fd2807SJeff Garzik void *addr = kmap_atomic(psg->page, KM_IRQ0); 4388c6fd2807SJeff Garzik memcpy(pad_buf, addr + psg->offset, qc->pad_len); 4389c6fd2807SJeff Garzik kunmap_atomic(addr, KM_IRQ0); 4390c6fd2807SJeff Garzik } 4391c6fd2807SJeff Garzik 4392c6fd2807SJeff Garzik sg_dma_address(psg) = ap->pad_dma + (qc->tag * ATA_DMA_PAD_SZ); 4393c6fd2807SJeff Garzik sg_dma_len(psg) = ATA_DMA_PAD_SZ; 4394c6fd2807SJeff Garzik /* trim last sg */ 4395c6fd2807SJeff Garzik lsg->length -= qc->pad_len; 4396c6fd2807SJeff Garzik if (lsg->length == 0) 4397c6fd2807SJeff Garzik trim_sg = 1; 4398c6fd2807SJeff Garzik 4399c6fd2807SJeff Garzik DPRINTK("padding done, sg[%d].length=%u pad_len=%u\n", 4400c6fd2807SJeff Garzik qc->n_elem - 1, lsg->length, qc->pad_len); 4401c6fd2807SJeff Garzik } 4402c6fd2807SJeff Garzik 4403c6fd2807SJeff Garzik pre_n_elem = qc->n_elem; 4404c6fd2807SJeff Garzik if (trim_sg && pre_n_elem) 4405c6fd2807SJeff Garzik pre_n_elem--; 4406c6fd2807SJeff Garzik 4407c6fd2807SJeff Garzik if (!pre_n_elem) { 4408c6fd2807SJeff Garzik n_elem = 0; 4409c6fd2807SJeff Garzik goto skip_map; 4410c6fd2807SJeff Garzik } 4411c6fd2807SJeff Garzik 4412c6fd2807SJeff Garzik dir = qc->dma_dir; 4413c6fd2807SJeff Garzik n_elem = dma_map_sg(ap->dev, sg, pre_n_elem, dir); 4414c6fd2807SJeff Garzik if (n_elem < 1) { 4415c6fd2807SJeff Garzik /* restore last sg */ 4416c6fd2807SJeff Garzik lsg->length += qc->pad_len; 4417c6fd2807SJeff Garzik return -1; 4418c6fd2807SJeff Garzik } 4419c6fd2807SJeff Garzik 4420c6fd2807SJeff Garzik DPRINTK("%d sg elements mapped\n", n_elem); 4421c6fd2807SJeff Garzik 4422c6fd2807SJeff Garzik skip_map: 4423c6fd2807SJeff Garzik qc->n_elem = n_elem; 4424c6fd2807SJeff Garzik 4425c6fd2807SJeff Garzik return 0; 4426c6fd2807SJeff Garzik } 4427c6fd2807SJeff Garzik 4428c6fd2807SJeff Garzik /** 4429c6fd2807SJeff Garzik * swap_buf_le16 - swap halves of 16-bit words in place 4430c6fd2807SJeff Garzik * @buf: Buffer to swap 4431c6fd2807SJeff Garzik * @buf_words: Number of 16-bit words in buffer. 4432c6fd2807SJeff Garzik * 4433c6fd2807SJeff Garzik * Swap halves of 16-bit words if needed to convert from 4434c6fd2807SJeff Garzik * little-endian byte order to native cpu byte order, or 4435c6fd2807SJeff Garzik * vice-versa. 4436c6fd2807SJeff Garzik * 4437c6fd2807SJeff Garzik * LOCKING: 4438c6fd2807SJeff Garzik * Inherited from caller. 4439c6fd2807SJeff Garzik */ 4440c6fd2807SJeff Garzik void swap_buf_le16(u16 *buf, unsigned int buf_words) 4441c6fd2807SJeff Garzik { 4442c6fd2807SJeff Garzik #ifdef __BIG_ENDIAN 4443c6fd2807SJeff Garzik unsigned int i; 4444c6fd2807SJeff Garzik 4445c6fd2807SJeff Garzik for (i = 0; i < buf_words; i++) 4446c6fd2807SJeff Garzik buf[i] = le16_to_cpu(buf[i]); 4447c6fd2807SJeff Garzik #endif /* __BIG_ENDIAN */ 4448c6fd2807SJeff Garzik } 4449c6fd2807SJeff Garzik 4450c6fd2807SJeff Garzik /** 44510d5ff566STejun Heo * ata_data_xfer - Transfer data by PIO 4452c6fd2807SJeff Garzik * @adev: device to target 4453c6fd2807SJeff Garzik * @buf: data buffer 4454c6fd2807SJeff Garzik * @buflen: buffer length 4455c6fd2807SJeff Garzik * @write_data: read/write 4456c6fd2807SJeff Garzik * 4457c6fd2807SJeff Garzik * Transfer data from/to the device data register by PIO. 4458c6fd2807SJeff Garzik * 4459c6fd2807SJeff Garzik * LOCKING: 4460c6fd2807SJeff Garzik * Inherited from caller. 4461c6fd2807SJeff Garzik */ 44620d5ff566STejun Heo void ata_data_xfer(struct ata_device *adev, unsigned char *buf, 4463c6fd2807SJeff Garzik unsigned int buflen, int write_data) 4464c6fd2807SJeff Garzik { 4465c6fd2807SJeff Garzik struct ata_port *ap = adev->ap; 4466c6fd2807SJeff Garzik unsigned int words = buflen >> 1; 4467c6fd2807SJeff Garzik 4468c6fd2807SJeff Garzik /* Transfer multiple of 2 bytes */ 4469c6fd2807SJeff Garzik if (write_data) 44700d5ff566STejun Heo iowrite16_rep(ap->ioaddr.data_addr, buf, words); 4471c6fd2807SJeff Garzik else 44720d5ff566STejun Heo ioread16_rep(ap->ioaddr.data_addr, buf, words); 4473c6fd2807SJeff Garzik 4474c6fd2807SJeff Garzik /* Transfer trailing 1 byte, if any. */ 4475c6fd2807SJeff Garzik if (unlikely(buflen & 0x01)) { 4476c6fd2807SJeff Garzik u16 align_buf[1] = { 0 }; 4477c6fd2807SJeff Garzik unsigned char *trailing_buf = buf + buflen - 1; 4478c6fd2807SJeff Garzik 4479c6fd2807SJeff Garzik if (write_data) { 4480c6fd2807SJeff Garzik memcpy(align_buf, trailing_buf, 1); 44810d5ff566STejun Heo iowrite16(le16_to_cpu(align_buf[0]), ap->ioaddr.data_addr); 4482c6fd2807SJeff Garzik } else { 44830d5ff566STejun Heo align_buf[0] = cpu_to_le16(ioread16(ap->ioaddr.data_addr)); 4484c6fd2807SJeff Garzik memcpy(trailing_buf, align_buf, 1); 4485c6fd2807SJeff Garzik } 4486c6fd2807SJeff Garzik } 4487c6fd2807SJeff Garzik } 4488c6fd2807SJeff Garzik 4489c6fd2807SJeff Garzik /** 44900d5ff566STejun Heo * ata_data_xfer_noirq - Transfer data by PIO 4491c6fd2807SJeff Garzik * @adev: device to target 4492c6fd2807SJeff Garzik * @buf: data buffer 4493c6fd2807SJeff Garzik * @buflen: buffer length 4494c6fd2807SJeff Garzik * @write_data: read/write 4495c6fd2807SJeff Garzik * 4496c6fd2807SJeff Garzik * Transfer data from/to the device data register by PIO. Do the 4497c6fd2807SJeff Garzik * transfer with interrupts disabled. 4498c6fd2807SJeff Garzik * 4499c6fd2807SJeff Garzik * LOCKING: 4500c6fd2807SJeff Garzik * Inherited from caller. 4501c6fd2807SJeff Garzik */ 45020d5ff566STejun Heo void ata_data_xfer_noirq(struct ata_device *adev, unsigned char *buf, 4503c6fd2807SJeff Garzik unsigned int buflen, int write_data) 4504c6fd2807SJeff Garzik { 4505c6fd2807SJeff Garzik unsigned long flags; 4506c6fd2807SJeff Garzik local_irq_save(flags); 45070d5ff566STejun Heo ata_data_xfer(adev, buf, buflen, write_data); 4508c6fd2807SJeff Garzik local_irq_restore(flags); 4509c6fd2807SJeff Garzik } 4510c6fd2807SJeff Garzik 4511c6fd2807SJeff Garzik 4512c6fd2807SJeff Garzik /** 45135a5dbd18SMark Lord * ata_pio_sector - Transfer a sector of data. 4514c6fd2807SJeff Garzik * @qc: Command on going 4515c6fd2807SJeff Garzik * 45165a5dbd18SMark Lord * Transfer qc->sect_size bytes of data from/to the ATA device. 4517c6fd2807SJeff Garzik * 4518c6fd2807SJeff Garzik * LOCKING: 4519c6fd2807SJeff Garzik * Inherited from caller. 4520c6fd2807SJeff Garzik */ 4521c6fd2807SJeff Garzik 4522c6fd2807SJeff Garzik static void ata_pio_sector(struct ata_queued_cmd *qc) 4523c6fd2807SJeff Garzik { 4524c6fd2807SJeff Garzik int do_write = (qc->tf.flags & ATA_TFLAG_WRITE); 4525c6fd2807SJeff Garzik struct scatterlist *sg = qc->__sg; 4526c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 4527c6fd2807SJeff Garzik struct page *page; 4528c6fd2807SJeff Garzik unsigned int offset; 4529c6fd2807SJeff Garzik unsigned char *buf; 4530c6fd2807SJeff Garzik 45315a5dbd18SMark Lord if (qc->curbytes == qc->nbytes - qc->sect_size) 4532c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_LAST; 4533c6fd2807SJeff Garzik 4534c6fd2807SJeff Garzik page = sg[qc->cursg].page; 4535726f0785STejun Heo offset = sg[qc->cursg].offset + qc->cursg_ofs; 4536c6fd2807SJeff Garzik 4537c6fd2807SJeff Garzik /* get the current page and offset */ 4538c6fd2807SJeff Garzik page = nth_page(page, (offset >> PAGE_SHIFT)); 4539c6fd2807SJeff Garzik offset %= PAGE_SIZE; 4540c6fd2807SJeff Garzik 4541c6fd2807SJeff Garzik DPRINTK("data %s\n", qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read"); 4542c6fd2807SJeff Garzik 4543c6fd2807SJeff Garzik if (PageHighMem(page)) { 4544c6fd2807SJeff Garzik unsigned long flags; 4545c6fd2807SJeff Garzik 4546c6fd2807SJeff Garzik /* FIXME: use a bounce buffer */ 4547c6fd2807SJeff Garzik local_irq_save(flags); 4548c6fd2807SJeff Garzik buf = kmap_atomic(page, KM_IRQ0); 4549c6fd2807SJeff Garzik 4550c6fd2807SJeff Garzik /* do the actual data transfer */ 45515a5dbd18SMark Lord ap->ops->data_xfer(qc->dev, buf + offset, qc->sect_size, do_write); 4552c6fd2807SJeff Garzik 4553c6fd2807SJeff Garzik kunmap_atomic(buf, KM_IRQ0); 4554c6fd2807SJeff Garzik local_irq_restore(flags); 4555c6fd2807SJeff Garzik } else { 4556c6fd2807SJeff Garzik buf = page_address(page); 45575a5dbd18SMark Lord ap->ops->data_xfer(qc->dev, buf + offset, qc->sect_size, do_write); 4558c6fd2807SJeff Garzik } 4559c6fd2807SJeff Garzik 45605a5dbd18SMark Lord qc->curbytes += qc->sect_size; 45615a5dbd18SMark Lord qc->cursg_ofs += qc->sect_size; 4562c6fd2807SJeff Garzik 4563726f0785STejun Heo if (qc->cursg_ofs == (&sg[qc->cursg])->length) { 4564c6fd2807SJeff Garzik qc->cursg++; 4565c6fd2807SJeff Garzik qc->cursg_ofs = 0; 4566c6fd2807SJeff Garzik } 4567c6fd2807SJeff Garzik } 4568c6fd2807SJeff Garzik 4569c6fd2807SJeff Garzik /** 45705a5dbd18SMark Lord * ata_pio_sectors - Transfer one or many sectors. 4571c6fd2807SJeff Garzik * @qc: Command on going 4572c6fd2807SJeff Garzik * 45735a5dbd18SMark Lord * Transfer one or many sectors of data from/to the 4574c6fd2807SJeff Garzik * ATA device for the DRQ request. 4575c6fd2807SJeff Garzik * 4576c6fd2807SJeff Garzik * LOCKING: 4577c6fd2807SJeff Garzik * Inherited from caller. 4578c6fd2807SJeff Garzik */ 4579c6fd2807SJeff Garzik 4580c6fd2807SJeff Garzik static void ata_pio_sectors(struct ata_queued_cmd *qc) 4581c6fd2807SJeff Garzik { 4582c6fd2807SJeff Garzik if (is_multi_taskfile(&qc->tf)) { 4583c6fd2807SJeff Garzik /* READ/WRITE MULTIPLE */ 4584c6fd2807SJeff Garzik unsigned int nsect; 4585c6fd2807SJeff Garzik 4586c6fd2807SJeff Garzik WARN_ON(qc->dev->multi_count == 0); 4587c6fd2807SJeff Garzik 45885a5dbd18SMark Lord nsect = min((qc->nbytes - qc->curbytes) / qc->sect_size, 4589726f0785STejun Heo qc->dev->multi_count); 4590c6fd2807SJeff Garzik while (nsect--) 4591c6fd2807SJeff Garzik ata_pio_sector(qc); 4592c6fd2807SJeff Garzik } else 4593c6fd2807SJeff Garzik ata_pio_sector(qc); 4594c6fd2807SJeff Garzik } 4595c6fd2807SJeff Garzik 4596c6fd2807SJeff Garzik /** 4597c6fd2807SJeff Garzik * atapi_send_cdb - Write CDB bytes to hardware 4598c6fd2807SJeff Garzik * @ap: Port to which ATAPI device is attached. 4599c6fd2807SJeff Garzik * @qc: Taskfile currently active 4600c6fd2807SJeff Garzik * 4601c6fd2807SJeff Garzik * When device has indicated its readiness to accept 4602c6fd2807SJeff Garzik * a CDB, this function is called. Send the CDB. 4603c6fd2807SJeff Garzik * 4604c6fd2807SJeff Garzik * LOCKING: 4605c6fd2807SJeff Garzik * caller. 4606c6fd2807SJeff Garzik */ 4607c6fd2807SJeff Garzik 4608c6fd2807SJeff Garzik static void atapi_send_cdb(struct ata_port *ap, struct ata_queued_cmd *qc) 4609c6fd2807SJeff Garzik { 4610c6fd2807SJeff Garzik /* send SCSI cdb */ 4611c6fd2807SJeff Garzik DPRINTK("send cdb\n"); 4612c6fd2807SJeff Garzik WARN_ON(qc->dev->cdb_len < 12); 4613c6fd2807SJeff Garzik 4614c6fd2807SJeff Garzik ap->ops->data_xfer(qc->dev, qc->cdb, qc->dev->cdb_len, 1); 4615c6fd2807SJeff Garzik ata_altstatus(ap); /* flush */ 4616c6fd2807SJeff Garzik 4617c6fd2807SJeff Garzik switch (qc->tf.protocol) { 4618c6fd2807SJeff Garzik case ATA_PROT_ATAPI: 4619c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST; 4620c6fd2807SJeff Garzik break; 4621c6fd2807SJeff Garzik case ATA_PROT_ATAPI_NODATA: 4622c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_LAST; 4623c6fd2807SJeff Garzik break; 4624c6fd2807SJeff Garzik case ATA_PROT_ATAPI_DMA: 4625c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_LAST; 4626c6fd2807SJeff Garzik /* initiate bmdma */ 4627c6fd2807SJeff Garzik ap->ops->bmdma_start(qc); 4628c6fd2807SJeff Garzik break; 4629c6fd2807SJeff Garzik } 4630c6fd2807SJeff Garzik } 4631c6fd2807SJeff Garzik 4632c6fd2807SJeff Garzik /** 4633c6fd2807SJeff Garzik * __atapi_pio_bytes - Transfer data from/to the ATAPI device. 4634c6fd2807SJeff Garzik * @qc: Command on going 4635c6fd2807SJeff Garzik * @bytes: number of bytes 4636c6fd2807SJeff Garzik * 4637c6fd2807SJeff Garzik * Transfer Transfer data from/to the ATAPI device. 4638c6fd2807SJeff Garzik * 4639c6fd2807SJeff Garzik * LOCKING: 4640c6fd2807SJeff Garzik * Inherited from caller. 4641c6fd2807SJeff Garzik * 4642c6fd2807SJeff Garzik */ 4643c6fd2807SJeff Garzik 4644c6fd2807SJeff Garzik static void __atapi_pio_bytes(struct ata_queued_cmd *qc, unsigned int bytes) 4645c6fd2807SJeff Garzik { 4646c6fd2807SJeff Garzik int do_write = (qc->tf.flags & ATA_TFLAG_WRITE); 4647c6fd2807SJeff Garzik struct scatterlist *sg = qc->__sg; 4648c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 4649c6fd2807SJeff Garzik struct page *page; 4650c6fd2807SJeff Garzik unsigned char *buf; 4651c6fd2807SJeff Garzik unsigned int offset, count; 4652c6fd2807SJeff Garzik 4653c6fd2807SJeff Garzik if (qc->curbytes + bytes >= qc->nbytes) 4654c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_LAST; 4655c6fd2807SJeff Garzik 4656c6fd2807SJeff Garzik next_sg: 4657c6fd2807SJeff Garzik if (unlikely(qc->cursg >= qc->n_elem)) { 4658c6fd2807SJeff Garzik /* 4659c6fd2807SJeff Garzik * The end of qc->sg is reached and the device expects 4660c6fd2807SJeff Garzik * more data to transfer. In order not to overrun qc->sg 4661c6fd2807SJeff Garzik * and fulfill length specified in the byte count register, 4662c6fd2807SJeff Garzik * - for read case, discard trailing data from the device 4663c6fd2807SJeff Garzik * - for write case, padding zero data to the device 4664c6fd2807SJeff Garzik */ 4665c6fd2807SJeff Garzik u16 pad_buf[1] = { 0 }; 4666c6fd2807SJeff Garzik unsigned int words = bytes >> 1; 4667c6fd2807SJeff Garzik unsigned int i; 4668c6fd2807SJeff Garzik 4669c6fd2807SJeff Garzik if (words) /* warning if bytes > 1 */ 4670c6fd2807SJeff Garzik ata_dev_printk(qc->dev, KERN_WARNING, 4671c6fd2807SJeff Garzik "%u bytes trailing data\n", bytes); 4672c6fd2807SJeff Garzik 4673c6fd2807SJeff Garzik for (i = 0; i < words; i++) 4674c6fd2807SJeff Garzik ap->ops->data_xfer(qc->dev, (unsigned char*)pad_buf, 2, do_write); 4675c6fd2807SJeff Garzik 4676c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_LAST; 4677c6fd2807SJeff Garzik return; 4678c6fd2807SJeff Garzik } 4679c6fd2807SJeff Garzik 4680c6fd2807SJeff Garzik sg = &qc->__sg[qc->cursg]; 4681c6fd2807SJeff Garzik 4682c6fd2807SJeff Garzik page = sg->page; 4683c6fd2807SJeff Garzik offset = sg->offset + qc->cursg_ofs; 4684c6fd2807SJeff Garzik 4685c6fd2807SJeff Garzik /* get the current page and offset */ 4686c6fd2807SJeff Garzik page = nth_page(page, (offset >> PAGE_SHIFT)); 4687c6fd2807SJeff Garzik offset %= PAGE_SIZE; 4688c6fd2807SJeff Garzik 4689c6fd2807SJeff Garzik /* don't overrun current sg */ 4690c6fd2807SJeff Garzik count = min(sg->length - qc->cursg_ofs, bytes); 4691c6fd2807SJeff Garzik 4692c6fd2807SJeff Garzik /* don't cross page boundaries */ 4693c6fd2807SJeff Garzik count = min(count, (unsigned int)PAGE_SIZE - offset); 4694c6fd2807SJeff Garzik 4695c6fd2807SJeff Garzik DPRINTK("data %s\n", qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read"); 4696c6fd2807SJeff Garzik 4697c6fd2807SJeff Garzik if (PageHighMem(page)) { 4698c6fd2807SJeff Garzik unsigned long flags; 4699c6fd2807SJeff Garzik 4700c6fd2807SJeff Garzik /* FIXME: use bounce buffer */ 4701c6fd2807SJeff Garzik local_irq_save(flags); 4702c6fd2807SJeff Garzik buf = kmap_atomic(page, KM_IRQ0); 4703c6fd2807SJeff Garzik 4704c6fd2807SJeff Garzik /* do the actual data transfer */ 4705c6fd2807SJeff Garzik ap->ops->data_xfer(qc->dev, buf + offset, count, do_write); 4706c6fd2807SJeff Garzik 4707c6fd2807SJeff Garzik kunmap_atomic(buf, KM_IRQ0); 4708c6fd2807SJeff Garzik local_irq_restore(flags); 4709c6fd2807SJeff Garzik } else { 4710c6fd2807SJeff Garzik buf = page_address(page); 4711c6fd2807SJeff Garzik ap->ops->data_xfer(qc->dev, buf + offset, count, do_write); 4712c6fd2807SJeff Garzik } 4713c6fd2807SJeff Garzik 4714c6fd2807SJeff Garzik bytes -= count; 4715c6fd2807SJeff Garzik qc->curbytes += count; 4716c6fd2807SJeff Garzik qc->cursg_ofs += count; 4717c6fd2807SJeff Garzik 4718c6fd2807SJeff Garzik if (qc->cursg_ofs == sg->length) { 4719c6fd2807SJeff Garzik qc->cursg++; 4720c6fd2807SJeff Garzik qc->cursg_ofs = 0; 4721c6fd2807SJeff Garzik } 4722c6fd2807SJeff Garzik 4723c6fd2807SJeff Garzik if (bytes) 4724c6fd2807SJeff Garzik goto next_sg; 4725c6fd2807SJeff Garzik } 4726c6fd2807SJeff Garzik 4727c6fd2807SJeff Garzik /** 4728c6fd2807SJeff Garzik * atapi_pio_bytes - Transfer data from/to the ATAPI device. 4729c6fd2807SJeff Garzik * @qc: Command on going 4730c6fd2807SJeff Garzik * 4731c6fd2807SJeff Garzik * Transfer Transfer data from/to the ATAPI device. 4732c6fd2807SJeff Garzik * 4733c6fd2807SJeff Garzik * LOCKING: 4734c6fd2807SJeff Garzik * Inherited from caller. 4735c6fd2807SJeff Garzik */ 4736c6fd2807SJeff Garzik 4737c6fd2807SJeff Garzik static void atapi_pio_bytes(struct ata_queued_cmd *qc) 4738c6fd2807SJeff Garzik { 4739c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 4740c6fd2807SJeff Garzik struct ata_device *dev = qc->dev; 4741c6fd2807SJeff Garzik unsigned int ireason, bc_lo, bc_hi, bytes; 4742c6fd2807SJeff Garzik int i_write, do_write = (qc->tf.flags & ATA_TFLAG_WRITE) ? 1 : 0; 4743c6fd2807SJeff Garzik 4744c6fd2807SJeff Garzik /* Abuse qc->result_tf for temp storage of intermediate TF 4745c6fd2807SJeff Garzik * here to save some kernel stack usage. 4746c6fd2807SJeff Garzik * For normal completion, qc->result_tf is not relevant. For 4747c6fd2807SJeff Garzik * error, qc->result_tf is later overwritten by ata_qc_complete(). 4748c6fd2807SJeff Garzik * So, the correctness of qc->result_tf is not affected. 4749c6fd2807SJeff Garzik */ 4750c6fd2807SJeff Garzik ap->ops->tf_read(ap, &qc->result_tf); 4751c6fd2807SJeff Garzik ireason = qc->result_tf.nsect; 4752c6fd2807SJeff Garzik bc_lo = qc->result_tf.lbam; 4753c6fd2807SJeff Garzik bc_hi = qc->result_tf.lbah; 4754c6fd2807SJeff Garzik bytes = (bc_hi << 8) | bc_lo; 4755c6fd2807SJeff Garzik 4756c6fd2807SJeff Garzik /* shall be cleared to zero, indicating xfer of data */ 4757c6fd2807SJeff Garzik if (ireason & (1 << 0)) 4758c6fd2807SJeff Garzik goto err_out; 4759c6fd2807SJeff Garzik 4760c6fd2807SJeff Garzik /* make sure transfer direction matches expected */ 4761c6fd2807SJeff Garzik i_write = ((ireason & (1 << 1)) == 0) ? 1 : 0; 4762c6fd2807SJeff Garzik if (do_write != i_write) 4763c6fd2807SJeff Garzik goto err_out; 4764c6fd2807SJeff Garzik 476544877b4eSTejun Heo VPRINTK("ata%u: xfering %d bytes\n", ap->print_id, bytes); 4766c6fd2807SJeff Garzik 4767c6fd2807SJeff Garzik __atapi_pio_bytes(qc, bytes); 4768c6fd2807SJeff Garzik 4769c6fd2807SJeff Garzik return; 4770c6fd2807SJeff Garzik 4771c6fd2807SJeff Garzik err_out: 4772c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_INFO, "ATAPI check failed\n"); 4773c6fd2807SJeff Garzik qc->err_mask |= AC_ERR_HSM; 4774c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_ERR; 4775c6fd2807SJeff Garzik } 4776c6fd2807SJeff Garzik 4777c6fd2807SJeff Garzik /** 4778c6fd2807SJeff Garzik * ata_hsm_ok_in_wq - Check if the qc can be handled in the workqueue. 4779c6fd2807SJeff Garzik * @ap: the target ata_port 4780c6fd2807SJeff Garzik * @qc: qc on going 4781c6fd2807SJeff Garzik * 4782c6fd2807SJeff Garzik * RETURNS: 4783c6fd2807SJeff Garzik * 1 if ok in workqueue, 0 otherwise. 4784c6fd2807SJeff Garzik */ 4785c6fd2807SJeff Garzik 4786c6fd2807SJeff Garzik static inline int ata_hsm_ok_in_wq(struct ata_port *ap, struct ata_queued_cmd *qc) 4787c6fd2807SJeff Garzik { 4788c6fd2807SJeff Garzik if (qc->tf.flags & ATA_TFLAG_POLLING) 4789c6fd2807SJeff Garzik return 1; 4790c6fd2807SJeff Garzik 4791c6fd2807SJeff Garzik if (ap->hsm_task_state == HSM_ST_FIRST) { 4792c6fd2807SJeff Garzik if (qc->tf.protocol == ATA_PROT_PIO && 4793c6fd2807SJeff Garzik (qc->tf.flags & ATA_TFLAG_WRITE)) 4794c6fd2807SJeff Garzik return 1; 4795c6fd2807SJeff Garzik 4796c6fd2807SJeff Garzik if (is_atapi_taskfile(&qc->tf) && 4797c6fd2807SJeff Garzik !(qc->dev->flags & ATA_DFLAG_CDB_INTR)) 4798c6fd2807SJeff Garzik return 1; 4799c6fd2807SJeff Garzik } 4800c6fd2807SJeff Garzik 4801c6fd2807SJeff Garzik return 0; 4802c6fd2807SJeff Garzik } 4803c6fd2807SJeff Garzik 4804c6fd2807SJeff Garzik /** 4805c6fd2807SJeff Garzik * ata_hsm_qc_complete - finish a qc running on standard HSM 4806c6fd2807SJeff Garzik * @qc: Command to complete 4807c6fd2807SJeff Garzik * @in_wq: 1 if called from workqueue, 0 otherwise 4808c6fd2807SJeff Garzik * 4809c6fd2807SJeff Garzik * Finish @qc which is running on standard HSM. 4810c6fd2807SJeff Garzik * 4811c6fd2807SJeff Garzik * LOCKING: 4812cca3974eSJeff Garzik * If @in_wq is zero, spin_lock_irqsave(host lock). 4813c6fd2807SJeff Garzik * Otherwise, none on entry and grabs host lock. 4814c6fd2807SJeff Garzik */ 4815c6fd2807SJeff Garzik static void ata_hsm_qc_complete(struct ata_queued_cmd *qc, int in_wq) 4816c6fd2807SJeff Garzik { 4817c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 4818c6fd2807SJeff Garzik unsigned long flags; 4819c6fd2807SJeff Garzik 4820c6fd2807SJeff Garzik if (ap->ops->error_handler) { 4821c6fd2807SJeff Garzik if (in_wq) { 4822c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 4823c6fd2807SJeff Garzik 4824cca3974eSJeff Garzik /* EH might have kicked in while host lock is 4825cca3974eSJeff Garzik * released. 4826c6fd2807SJeff Garzik */ 4827c6fd2807SJeff Garzik qc = ata_qc_from_tag(ap, qc->tag); 4828c6fd2807SJeff Garzik if (qc) { 4829c6fd2807SJeff Garzik if (likely(!(qc->err_mask & AC_ERR_HSM))) { 483083625006SAkira Iguchi ap->ops->irq_on(ap); 4831c6fd2807SJeff Garzik ata_qc_complete(qc); 4832c6fd2807SJeff Garzik } else 4833c6fd2807SJeff Garzik ata_port_freeze(ap); 4834c6fd2807SJeff Garzik } 4835c6fd2807SJeff Garzik 4836c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 4837c6fd2807SJeff Garzik } else { 4838c6fd2807SJeff Garzik if (likely(!(qc->err_mask & AC_ERR_HSM))) 4839c6fd2807SJeff Garzik ata_qc_complete(qc); 4840c6fd2807SJeff Garzik else 4841c6fd2807SJeff Garzik ata_port_freeze(ap); 4842c6fd2807SJeff Garzik } 4843c6fd2807SJeff Garzik } else { 4844c6fd2807SJeff Garzik if (in_wq) { 4845c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 484683625006SAkira Iguchi ap->ops->irq_on(ap); 4847c6fd2807SJeff Garzik ata_qc_complete(qc); 4848c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 4849c6fd2807SJeff Garzik } else 4850c6fd2807SJeff Garzik ata_qc_complete(qc); 4851c6fd2807SJeff Garzik } 4852c6fd2807SJeff Garzik } 4853c6fd2807SJeff Garzik 4854c6fd2807SJeff Garzik /** 4855c6fd2807SJeff Garzik * ata_hsm_move - move the HSM to the next state. 4856c6fd2807SJeff Garzik * @ap: the target ata_port 4857c6fd2807SJeff Garzik * @qc: qc on going 4858c6fd2807SJeff Garzik * @status: current device status 4859c6fd2807SJeff Garzik * @in_wq: 1 if called from workqueue, 0 otherwise 4860c6fd2807SJeff Garzik * 4861c6fd2807SJeff Garzik * RETURNS: 4862c6fd2807SJeff Garzik * 1 when poll next status needed, 0 otherwise. 4863c6fd2807SJeff Garzik */ 4864c6fd2807SJeff Garzik int ata_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc, 4865c6fd2807SJeff Garzik u8 status, int in_wq) 4866c6fd2807SJeff Garzik { 4867c6fd2807SJeff Garzik unsigned long flags = 0; 4868c6fd2807SJeff Garzik int poll_next; 4869c6fd2807SJeff Garzik 4870c6fd2807SJeff Garzik WARN_ON((qc->flags & ATA_QCFLAG_ACTIVE) == 0); 4871c6fd2807SJeff Garzik 4872c6fd2807SJeff Garzik /* Make sure ata_qc_issue_prot() does not throw things 4873c6fd2807SJeff Garzik * like DMA polling into the workqueue. Notice that 4874c6fd2807SJeff Garzik * in_wq is not equivalent to (qc->tf.flags & ATA_TFLAG_POLLING). 4875c6fd2807SJeff Garzik */ 4876c6fd2807SJeff Garzik WARN_ON(in_wq != ata_hsm_ok_in_wq(ap, qc)); 4877c6fd2807SJeff Garzik 4878c6fd2807SJeff Garzik fsm_start: 4879c6fd2807SJeff Garzik DPRINTK("ata%u: protocol %d task_state %d (dev_stat 0x%X)\n", 488044877b4eSTejun Heo ap->print_id, qc->tf.protocol, ap->hsm_task_state, status); 4881c6fd2807SJeff Garzik 4882c6fd2807SJeff Garzik switch (ap->hsm_task_state) { 4883c6fd2807SJeff Garzik case HSM_ST_FIRST: 4884c6fd2807SJeff Garzik /* Send first data block or PACKET CDB */ 4885c6fd2807SJeff Garzik 4886c6fd2807SJeff Garzik /* If polling, we will stay in the work queue after 4887c6fd2807SJeff Garzik * sending the data. Otherwise, interrupt handler 4888c6fd2807SJeff Garzik * takes over after sending the data. 4889c6fd2807SJeff Garzik */ 4890c6fd2807SJeff Garzik poll_next = (qc->tf.flags & ATA_TFLAG_POLLING); 4891c6fd2807SJeff Garzik 4892c6fd2807SJeff Garzik /* check device status */ 4893c6fd2807SJeff Garzik if (unlikely((status & ATA_DRQ) == 0)) { 4894c6fd2807SJeff Garzik /* handle BSY=0, DRQ=0 as error */ 4895c6fd2807SJeff Garzik if (likely(status & (ATA_ERR | ATA_DF))) 4896c6fd2807SJeff Garzik /* device stops HSM for abort/error */ 4897c6fd2807SJeff Garzik qc->err_mask |= AC_ERR_DEV; 4898c6fd2807SJeff Garzik else 4899c6fd2807SJeff Garzik /* HSM violation. Let EH handle this */ 4900c6fd2807SJeff Garzik qc->err_mask |= AC_ERR_HSM; 4901c6fd2807SJeff Garzik 4902c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_ERR; 4903c6fd2807SJeff Garzik goto fsm_start; 4904c6fd2807SJeff Garzik } 4905c6fd2807SJeff Garzik 4906c6fd2807SJeff Garzik /* Device should not ask for data transfer (DRQ=1) 4907c6fd2807SJeff Garzik * when it finds something wrong. 4908c6fd2807SJeff Garzik * We ignore DRQ here and stop the HSM by 4909c6fd2807SJeff Garzik * changing hsm_task_state to HSM_ST_ERR and 4910c6fd2807SJeff Garzik * let the EH abort the command or reset the device. 4911c6fd2807SJeff Garzik */ 4912c6fd2807SJeff Garzik if (unlikely(status & (ATA_ERR | ATA_DF))) { 491344877b4eSTejun Heo ata_port_printk(ap, KERN_WARNING, "DRQ=1 with device " 491444877b4eSTejun Heo "error, dev_stat 0x%X\n", status); 4915c6fd2807SJeff Garzik qc->err_mask |= AC_ERR_HSM; 4916c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_ERR; 4917c6fd2807SJeff Garzik goto fsm_start; 4918c6fd2807SJeff Garzik } 4919c6fd2807SJeff Garzik 4920c6fd2807SJeff Garzik /* Send the CDB (atapi) or the first data block (ata pio out). 4921c6fd2807SJeff Garzik * During the state transition, interrupt handler shouldn't 4922c6fd2807SJeff Garzik * be invoked before the data transfer is complete and 4923c6fd2807SJeff Garzik * hsm_task_state is changed. Hence, the following locking. 4924c6fd2807SJeff Garzik */ 4925c6fd2807SJeff Garzik if (in_wq) 4926c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 4927c6fd2807SJeff Garzik 4928c6fd2807SJeff Garzik if (qc->tf.protocol == ATA_PROT_PIO) { 4929c6fd2807SJeff Garzik /* PIO data out protocol. 4930c6fd2807SJeff Garzik * send first data block. 4931c6fd2807SJeff Garzik */ 4932c6fd2807SJeff Garzik 4933c6fd2807SJeff Garzik /* ata_pio_sectors() might change the state 4934c6fd2807SJeff Garzik * to HSM_ST_LAST. so, the state is changed here 4935c6fd2807SJeff Garzik * before ata_pio_sectors(). 4936c6fd2807SJeff Garzik */ 4937c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST; 4938c6fd2807SJeff Garzik ata_pio_sectors(qc); 4939c6fd2807SJeff Garzik ata_altstatus(ap); /* flush */ 4940c6fd2807SJeff Garzik } else 4941c6fd2807SJeff Garzik /* send CDB */ 4942c6fd2807SJeff Garzik atapi_send_cdb(ap, qc); 4943c6fd2807SJeff Garzik 4944c6fd2807SJeff Garzik if (in_wq) 4945c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 4946c6fd2807SJeff Garzik 4947c6fd2807SJeff Garzik /* if polling, ata_pio_task() handles the rest. 4948c6fd2807SJeff Garzik * otherwise, interrupt handler takes over from here. 4949c6fd2807SJeff Garzik */ 4950c6fd2807SJeff Garzik break; 4951c6fd2807SJeff Garzik 4952c6fd2807SJeff Garzik case HSM_ST: 4953c6fd2807SJeff Garzik /* complete command or read/write the data register */ 4954c6fd2807SJeff Garzik if (qc->tf.protocol == ATA_PROT_ATAPI) { 4955c6fd2807SJeff Garzik /* ATAPI PIO protocol */ 4956c6fd2807SJeff Garzik if ((status & ATA_DRQ) == 0) { 4957c6fd2807SJeff Garzik /* No more data to transfer or device error. 4958c6fd2807SJeff Garzik * Device error will be tagged in HSM_ST_LAST. 4959c6fd2807SJeff Garzik */ 4960c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_LAST; 4961c6fd2807SJeff Garzik goto fsm_start; 4962c6fd2807SJeff Garzik } 4963c6fd2807SJeff Garzik 4964c6fd2807SJeff Garzik /* Device should not ask for data transfer (DRQ=1) 4965c6fd2807SJeff Garzik * when it finds something wrong. 4966c6fd2807SJeff Garzik * We ignore DRQ here and stop the HSM by 4967c6fd2807SJeff Garzik * changing hsm_task_state to HSM_ST_ERR and 4968c6fd2807SJeff Garzik * let the EH abort the command or reset the device. 4969c6fd2807SJeff Garzik */ 4970c6fd2807SJeff Garzik if (unlikely(status & (ATA_ERR | ATA_DF))) { 497144877b4eSTejun Heo ata_port_printk(ap, KERN_WARNING, "DRQ=1 with " 497244877b4eSTejun Heo "device error, dev_stat 0x%X\n", 497344877b4eSTejun Heo status); 4974c6fd2807SJeff Garzik qc->err_mask |= AC_ERR_HSM; 4975c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_ERR; 4976c6fd2807SJeff Garzik goto fsm_start; 4977c6fd2807SJeff Garzik } 4978c6fd2807SJeff Garzik 4979c6fd2807SJeff Garzik atapi_pio_bytes(qc); 4980c6fd2807SJeff Garzik 4981c6fd2807SJeff Garzik if (unlikely(ap->hsm_task_state == HSM_ST_ERR)) 4982c6fd2807SJeff Garzik /* bad ireason reported by device */ 4983c6fd2807SJeff Garzik goto fsm_start; 4984c6fd2807SJeff Garzik 4985c6fd2807SJeff Garzik } else { 4986c6fd2807SJeff Garzik /* ATA PIO protocol */ 4987c6fd2807SJeff Garzik if (unlikely((status & ATA_DRQ) == 0)) { 4988c6fd2807SJeff Garzik /* handle BSY=0, DRQ=0 as error */ 4989c6fd2807SJeff Garzik if (likely(status & (ATA_ERR | ATA_DF))) 4990c6fd2807SJeff Garzik /* device stops HSM for abort/error */ 4991c6fd2807SJeff Garzik qc->err_mask |= AC_ERR_DEV; 4992c6fd2807SJeff Garzik else 499355a8e2c8STejun Heo /* HSM violation. Let EH handle this. 499455a8e2c8STejun Heo * Phantom devices also trigger this 499555a8e2c8STejun Heo * condition. Mark hint. 499655a8e2c8STejun Heo */ 499755a8e2c8STejun Heo qc->err_mask |= AC_ERR_HSM | 499855a8e2c8STejun Heo AC_ERR_NODEV_HINT; 4999c6fd2807SJeff Garzik 5000c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_ERR; 5001c6fd2807SJeff Garzik goto fsm_start; 5002c6fd2807SJeff Garzik } 5003c6fd2807SJeff Garzik 5004c6fd2807SJeff Garzik /* For PIO reads, some devices may ask for 5005c6fd2807SJeff Garzik * data transfer (DRQ=1) alone with ERR=1. 5006c6fd2807SJeff Garzik * We respect DRQ here and transfer one 5007c6fd2807SJeff Garzik * block of junk data before changing the 5008c6fd2807SJeff Garzik * hsm_task_state to HSM_ST_ERR. 5009c6fd2807SJeff Garzik * 5010c6fd2807SJeff Garzik * For PIO writes, ERR=1 DRQ=1 doesn't make 5011c6fd2807SJeff Garzik * sense since the data block has been 5012c6fd2807SJeff Garzik * transferred to the device. 5013c6fd2807SJeff Garzik */ 5014c6fd2807SJeff Garzik if (unlikely(status & (ATA_ERR | ATA_DF))) { 5015c6fd2807SJeff Garzik /* data might be corrputed */ 5016c6fd2807SJeff Garzik qc->err_mask |= AC_ERR_DEV; 5017c6fd2807SJeff Garzik 5018c6fd2807SJeff Garzik if (!(qc->tf.flags & ATA_TFLAG_WRITE)) { 5019c6fd2807SJeff Garzik ata_pio_sectors(qc); 5020c6fd2807SJeff Garzik ata_altstatus(ap); 5021c6fd2807SJeff Garzik status = ata_wait_idle(ap); 5022c6fd2807SJeff Garzik } 5023c6fd2807SJeff Garzik 5024c6fd2807SJeff Garzik if (status & (ATA_BUSY | ATA_DRQ)) 5025c6fd2807SJeff Garzik qc->err_mask |= AC_ERR_HSM; 5026c6fd2807SJeff Garzik 5027c6fd2807SJeff Garzik /* ata_pio_sectors() might change the 5028c6fd2807SJeff Garzik * state to HSM_ST_LAST. so, the state 5029c6fd2807SJeff Garzik * is changed after ata_pio_sectors(). 5030c6fd2807SJeff Garzik */ 5031c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_ERR; 5032c6fd2807SJeff Garzik goto fsm_start; 5033c6fd2807SJeff Garzik } 5034c6fd2807SJeff Garzik 5035c6fd2807SJeff Garzik ata_pio_sectors(qc); 5036c6fd2807SJeff Garzik 5037c6fd2807SJeff Garzik if (ap->hsm_task_state == HSM_ST_LAST && 5038c6fd2807SJeff Garzik (!(qc->tf.flags & ATA_TFLAG_WRITE))) { 5039c6fd2807SJeff Garzik /* all data read */ 5040c6fd2807SJeff Garzik ata_altstatus(ap); 5041c6fd2807SJeff Garzik status = ata_wait_idle(ap); 5042c6fd2807SJeff Garzik goto fsm_start; 5043c6fd2807SJeff Garzik } 5044c6fd2807SJeff Garzik } 5045c6fd2807SJeff Garzik 5046c6fd2807SJeff Garzik ata_altstatus(ap); /* flush */ 5047c6fd2807SJeff Garzik poll_next = 1; 5048c6fd2807SJeff Garzik break; 5049c6fd2807SJeff Garzik 5050c6fd2807SJeff Garzik case HSM_ST_LAST: 5051c6fd2807SJeff Garzik if (unlikely(!ata_ok(status))) { 5052c6fd2807SJeff Garzik qc->err_mask |= __ac_err_mask(status); 5053c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_ERR; 5054c6fd2807SJeff Garzik goto fsm_start; 5055c6fd2807SJeff Garzik } 5056c6fd2807SJeff Garzik 5057c6fd2807SJeff Garzik /* no more data to transfer */ 5058c6fd2807SJeff Garzik DPRINTK("ata%u: dev %u command complete, drv_stat 0x%x\n", 505944877b4eSTejun Heo ap->print_id, qc->dev->devno, status); 5060c6fd2807SJeff Garzik 5061c6fd2807SJeff Garzik WARN_ON(qc->err_mask); 5062c6fd2807SJeff Garzik 5063c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_IDLE; 5064c6fd2807SJeff Garzik 5065c6fd2807SJeff Garzik /* complete taskfile transaction */ 5066c6fd2807SJeff Garzik ata_hsm_qc_complete(qc, in_wq); 5067c6fd2807SJeff Garzik 5068c6fd2807SJeff Garzik poll_next = 0; 5069c6fd2807SJeff Garzik break; 5070c6fd2807SJeff Garzik 5071c6fd2807SJeff Garzik case HSM_ST_ERR: 5072c6fd2807SJeff Garzik /* make sure qc->err_mask is available to 5073c6fd2807SJeff Garzik * know what's wrong and recover 5074c6fd2807SJeff Garzik */ 5075c6fd2807SJeff Garzik WARN_ON(qc->err_mask == 0); 5076c6fd2807SJeff Garzik 5077c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_IDLE; 5078c6fd2807SJeff Garzik 5079c6fd2807SJeff Garzik /* complete taskfile transaction */ 5080c6fd2807SJeff Garzik ata_hsm_qc_complete(qc, in_wq); 5081c6fd2807SJeff Garzik 5082c6fd2807SJeff Garzik poll_next = 0; 5083c6fd2807SJeff Garzik break; 5084c6fd2807SJeff Garzik default: 5085c6fd2807SJeff Garzik poll_next = 0; 5086c6fd2807SJeff Garzik BUG(); 5087c6fd2807SJeff Garzik } 5088c6fd2807SJeff Garzik 5089c6fd2807SJeff Garzik return poll_next; 5090c6fd2807SJeff Garzik } 5091c6fd2807SJeff Garzik 509265f27f38SDavid Howells static void ata_pio_task(struct work_struct *work) 5093c6fd2807SJeff Garzik { 509465f27f38SDavid Howells struct ata_port *ap = 509565f27f38SDavid Howells container_of(work, struct ata_port, port_task.work); 509665f27f38SDavid Howells struct ata_queued_cmd *qc = ap->port_task_data; 5097c6fd2807SJeff Garzik u8 status; 5098c6fd2807SJeff Garzik int poll_next; 5099c6fd2807SJeff Garzik 5100c6fd2807SJeff Garzik fsm_start: 5101c6fd2807SJeff Garzik WARN_ON(ap->hsm_task_state == HSM_ST_IDLE); 5102c6fd2807SJeff Garzik 5103c6fd2807SJeff Garzik /* 5104c6fd2807SJeff Garzik * This is purely heuristic. This is a fast path. 5105c6fd2807SJeff Garzik * Sometimes when we enter, BSY will be cleared in 5106c6fd2807SJeff Garzik * a chk-status or two. If not, the drive is probably seeking 5107c6fd2807SJeff Garzik * or something. Snooze for a couple msecs, then 5108c6fd2807SJeff Garzik * chk-status again. If still busy, queue delayed work. 5109c6fd2807SJeff Garzik */ 5110c6fd2807SJeff Garzik status = ata_busy_wait(ap, ATA_BUSY, 5); 5111c6fd2807SJeff Garzik if (status & ATA_BUSY) { 5112c6fd2807SJeff Garzik msleep(2); 5113c6fd2807SJeff Garzik status = ata_busy_wait(ap, ATA_BUSY, 10); 5114c6fd2807SJeff Garzik if (status & ATA_BUSY) { 5115c6fd2807SJeff Garzik ata_port_queue_task(ap, ata_pio_task, qc, ATA_SHORT_PAUSE); 5116c6fd2807SJeff Garzik return; 5117c6fd2807SJeff Garzik } 5118c6fd2807SJeff Garzik } 5119c6fd2807SJeff Garzik 5120c6fd2807SJeff Garzik /* move the HSM */ 5121c6fd2807SJeff Garzik poll_next = ata_hsm_move(ap, qc, status, 1); 5122c6fd2807SJeff Garzik 5123c6fd2807SJeff Garzik /* another command or interrupt handler 5124c6fd2807SJeff Garzik * may be running at this point. 5125c6fd2807SJeff Garzik */ 5126c6fd2807SJeff Garzik if (poll_next) 5127c6fd2807SJeff Garzik goto fsm_start; 5128c6fd2807SJeff Garzik } 5129c6fd2807SJeff Garzik 5130c6fd2807SJeff Garzik /** 5131c6fd2807SJeff Garzik * ata_qc_new - Request an available ATA command, for queueing 5132c6fd2807SJeff Garzik * @ap: Port associated with device @dev 5133c6fd2807SJeff Garzik * @dev: Device from whom we request an available command structure 5134c6fd2807SJeff Garzik * 5135c6fd2807SJeff Garzik * LOCKING: 5136c6fd2807SJeff Garzik * None. 5137c6fd2807SJeff Garzik */ 5138c6fd2807SJeff Garzik 5139c6fd2807SJeff Garzik static struct ata_queued_cmd *ata_qc_new(struct ata_port *ap) 5140c6fd2807SJeff Garzik { 5141c6fd2807SJeff Garzik struct ata_queued_cmd *qc = NULL; 5142c6fd2807SJeff Garzik unsigned int i; 5143c6fd2807SJeff Garzik 5144c6fd2807SJeff Garzik /* no command while frozen */ 5145c6fd2807SJeff Garzik if (unlikely(ap->pflags & ATA_PFLAG_FROZEN)) 5146c6fd2807SJeff Garzik return NULL; 5147c6fd2807SJeff Garzik 5148c6fd2807SJeff Garzik /* the last tag is reserved for internal command. */ 5149c6fd2807SJeff Garzik for (i = 0; i < ATA_MAX_QUEUE - 1; i++) 5150c6fd2807SJeff Garzik if (!test_and_set_bit(i, &ap->qc_allocated)) { 5151c6fd2807SJeff Garzik qc = __ata_qc_from_tag(ap, i); 5152c6fd2807SJeff Garzik break; 5153c6fd2807SJeff Garzik } 5154c6fd2807SJeff Garzik 5155c6fd2807SJeff Garzik if (qc) 5156c6fd2807SJeff Garzik qc->tag = i; 5157c6fd2807SJeff Garzik 5158c6fd2807SJeff Garzik return qc; 5159c6fd2807SJeff Garzik } 5160c6fd2807SJeff Garzik 5161c6fd2807SJeff Garzik /** 5162c6fd2807SJeff Garzik * ata_qc_new_init - Request an available ATA command, and initialize it 5163c6fd2807SJeff Garzik * @dev: Device from whom we request an available command structure 5164c6fd2807SJeff Garzik * 5165c6fd2807SJeff Garzik * LOCKING: 5166c6fd2807SJeff Garzik * None. 5167c6fd2807SJeff Garzik */ 5168c6fd2807SJeff Garzik 5169c6fd2807SJeff Garzik struct ata_queued_cmd *ata_qc_new_init(struct ata_device *dev) 5170c6fd2807SJeff Garzik { 5171c6fd2807SJeff Garzik struct ata_port *ap = dev->ap; 5172c6fd2807SJeff Garzik struct ata_queued_cmd *qc; 5173c6fd2807SJeff Garzik 5174c6fd2807SJeff Garzik qc = ata_qc_new(ap); 5175c6fd2807SJeff Garzik if (qc) { 5176c6fd2807SJeff Garzik qc->scsicmd = NULL; 5177c6fd2807SJeff Garzik qc->ap = ap; 5178c6fd2807SJeff Garzik qc->dev = dev; 5179c6fd2807SJeff Garzik 5180c6fd2807SJeff Garzik ata_qc_reinit(qc); 5181c6fd2807SJeff Garzik } 5182c6fd2807SJeff Garzik 5183c6fd2807SJeff Garzik return qc; 5184c6fd2807SJeff Garzik } 5185c6fd2807SJeff Garzik 5186c6fd2807SJeff Garzik /** 5187c6fd2807SJeff Garzik * ata_qc_free - free unused ata_queued_cmd 5188c6fd2807SJeff Garzik * @qc: Command to complete 5189c6fd2807SJeff Garzik * 5190c6fd2807SJeff Garzik * Designed to free unused ata_queued_cmd object 5191c6fd2807SJeff Garzik * in case something prevents using it. 5192c6fd2807SJeff Garzik * 5193c6fd2807SJeff Garzik * LOCKING: 5194cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 5195c6fd2807SJeff Garzik */ 5196c6fd2807SJeff Garzik void ata_qc_free(struct ata_queued_cmd *qc) 5197c6fd2807SJeff Garzik { 5198c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 5199c6fd2807SJeff Garzik unsigned int tag; 5200c6fd2807SJeff Garzik 5201c6fd2807SJeff Garzik WARN_ON(qc == NULL); /* ata_qc_from_tag _might_ return NULL */ 5202c6fd2807SJeff Garzik 5203c6fd2807SJeff Garzik qc->flags = 0; 5204c6fd2807SJeff Garzik tag = qc->tag; 5205c6fd2807SJeff Garzik if (likely(ata_tag_valid(tag))) { 5206c6fd2807SJeff Garzik qc->tag = ATA_TAG_POISON; 5207c6fd2807SJeff Garzik clear_bit(tag, &ap->qc_allocated); 5208c6fd2807SJeff Garzik } 5209c6fd2807SJeff Garzik } 5210c6fd2807SJeff Garzik 5211c6fd2807SJeff Garzik void __ata_qc_complete(struct ata_queued_cmd *qc) 5212c6fd2807SJeff Garzik { 5213c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 5214c6fd2807SJeff Garzik 5215c6fd2807SJeff Garzik WARN_ON(qc == NULL); /* ata_qc_from_tag _might_ return NULL */ 5216c6fd2807SJeff Garzik WARN_ON(!(qc->flags & ATA_QCFLAG_ACTIVE)); 5217c6fd2807SJeff Garzik 5218c6fd2807SJeff Garzik if (likely(qc->flags & ATA_QCFLAG_DMAMAP)) 5219c6fd2807SJeff Garzik ata_sg_clean(qc); 5220c6fd2807SJeff Garzik 5221c6fd2807SJeff Garzik /* command should be marked inactive atomically with qc completion */ 5222c6fd2807SJeff Garzik if (qc->tf.protocol == ATA_PROT_NCQ) 5223c6fd2807SJeff Garzik ap->sactive &= ~(1 << qc->tag); 5224c6fd2807SJeff Garzik else 5225c6fd2807SJeff Garzik ap->active_tag = ATA_TAG_POISON; 5226c6fd2807SJeff Garzik 5227c6fd2807SJeff Garzik /* atapi: mark qc as inactive to prevent the interrupt handler 5228c6fd2807SJeff Garzik * from completing the command twice later, before the error handler 5229c6fd2807SJeff Garzik * is called. (when rc != 0 and atapi request sense is needed) 5230c6fd2807SJeff Garzik */ 5231c6fd2807SJeff Garzik qc->flags &= ~ATA_QCFLAG_ACTIVE; 5232c6fd2807SJeff Garzik ap->qc_active &= ~(1 << qc->tag); 5233c6fd2807SJeff Garzik 5234c6fd2807SJeff Garzik /* call completion callback */ 5235c6fd2807SJeff Garzik qc->complete_fn(qc); 5236c6fd2807SJeff Garzik } 5237c6fd2807SJeff Garzik 523839599a53STejun Heo static void fill_result_tf(struct ata_queued_cmd *qc) 523939599a53STejun Heo { 524039599a53STejun Heo struct ata_port *ap = qc->ap; 524139599a53STejun Heo 524239599a53STejun Heo qc->result_tf.flags = qc->tf.flags; 52434742d54fSMark Lord ap->ops->tf_read(ap, &qc->result_tf); 524439599a53STejun Heo } 524539599a53STejun Heo 5246c6fd2807SJeff Garzik /** 5247c6fd2807SJeff Garzik * ata_qc_complete - Complete an active ATA command 5248c6fd2807SJeff Garzik * @qc: Command to complete 5249c6fd2807SJeff Garzik * @err_mask: ATA Status register contents 5250c6fd2807SJeff Garzik * 5251c6fd2807SJeff Garzik * Indicate to the mid and upper layers that an ATA 5252c6fd2807SJeff Garzik * command has completed, with either an ok or not-ok status. 5253c6fd2807SJeff Garzik * 5254c6fd2807SJeff Garzik * LOCKING: 5255cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 5256c6fd2807SJeff Garzik */ 5257c6fd2807SJeff Garzik void ata_qc_complete(struct ata_queued_cmd *qc) 5258c6fd2807SJeff Garzik { 5259c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 5260c6fd2807SJeff Garzik 5261c6fd2807SJeff Garzik /* XXX: New EH and old EH use different mechanisms to 5262c6fd2807SJeff Garzik * synchronize EH with regular execution path. 5263c6fd2807SJeff Garzik * 5264c6fd2807SJeff Garzik * In new EH, a failed qc is marked with ATA_QCFLAG_FAILED. 5265c6fd2807SJeff Garzik * Normal execution path is responsible for not accessing a 5266c6fd2807SJeff Garzik * failed qc. libata core enforces the rule by returning NULL 5267c6fd2807SJeff Garzik * from ata_qc_from_tag() for failed qcs. 5268c6fd2807SJeff Garzik * 5269c6fd2807SJeff Garzik * Old EH depends on ata_qc_complete() nullifying completion 5270c6fd2807SJeff Garzik * requests if ATA_QCFLAG_EH_SCHEDULED is set. Old EH does 5271c6fd2807SJeff Garzik * not synchronize with interrupt handler. Only PIO task is 5272c6fd2807SJeff Garzik * taken care of. 5273c6fd2807SJeff Garzik */ 5274c6fd2807SJeff Garzik if (ap->ops->error_handler) { 5275c6fd2807SJeff Garzik WARN_ON(ap->pflags & ATA_PFLAG_FROZEN); 5276c6fd2807SJeff Garzik 5277c6fd2807SJeff Garzik if (unlikely(qc->err_mask)) 5278c6fd2807SJeff Garzik qc->flags |= ATA_QCFLAG_FAILED; 5279c6fd2807SJeff Garzik 5280c6fd2807SJeff Garzik if (unlikely(qc->flags & ATA_QCFLAG_FAILED)) { 5281c6fd2807SJeff Garzik if (!ata_tag_internal(qc->tag)) { 5282c6fd2807SJeff Garzik /* always fill result TF for failed qc */ 528339599a53STejun Heo fill_result_tf(qc); 5284c6fd2807SJeff Garzik ata_qc_schedule_eh(qc); 5285c6fd2807SJeff Garzik return; 5286c6fd2807SJeff Garzik } 5287c6fd2807SJeff Garzik } 5288c6fd2807SJeff Garzik 5289c6fd2807SJeff Garzik /* read result TF if requested */ 5290c6fd2807SJeff Garzik if (qc->flags & ATA_QCFLAG_RESULT_TF) 529139599a53STejun Heo fill_result_tf(qc); 5292c6fd2807SJeff Garzik 5293c6fd2807SJeff Garzik __ata_qc_complete(qc); 5294c6fd2807SJeff Garzik } else { 5295c6fd2807SJeff Garzik if (qc->flags & ATA_QCFLAG_EH_SCHEDULED) 5296c6fd2807SJeff Garzik return; 5297c6fd2807SJeff Garzik 5298c6fd2807SJeff Garzik /* read result TF if failed or requested */ 5299c6fd2807SJeff Garzik if (qc->err_mask || qc->flags & ATA_QCFLAG_RESULT_TF) 530039599a53STejun Heo fill_result_tf(qc); 5301c6fd2807SJeff Garzik 5302c6fd2807SJeff Garzik __ata_qc_complete(qc); 5303c6fd2807SJeff Garzik } 5304c6fd2807SJeff Garzik } 5305c6fd2807SJeff Garzik 5306c6fd2807SJeff Garzik /** 5307c6fd2807SJeff Garzik * ata_qc_complete_multiple - Complete multiple qcs successfully 5308c6fd2807SJeff Garzik * @ap: port in question 5309c6fd2807SJeff Garzik * @qc_active: new qc_active mask 5310c6fd2807SJeff Garzik * @finish_qc: LLDD callback invoked before completing a qc 5311c6fd2807SJeff Garzik * 5312c6fd2807SJeff Garzik * Complete in-flight commands. This functions is meant to be 5313c6fd2807SJeff Garzik * called from low-level driver's interrupt routine to complete 5314c6fd2807SJeff Garzik * requests normally. ap->qc_active and @qc_active is compared 5315c6fd2807SJeff Garzik * and commands are completed accordingly. 5316c6fd2807SJeff Garzik * 5317c6fd2807SJeff Garzik * LOCKING: 5318cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 5319c6fd2807SJeff Garzik * 5320c6fd2807SJeff Garzik * RETURNS: 5321c6fd2807SJeff Garzik * Number of completed commands on success, -errno otherwise. 5322c6fd2807SJeff Garzik */ 5323c6fd2807SJeff Garzik int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active, 5324c6fd2807SJeff Garzik void (*finish_qc)(struct ata_queued_cmd *)) 5325c6fd2807SJeff Garzik { 5326c6fd2807SJeff Garzik int nr_done = 0; 5327c6fd2807SJeff Garzik u32 done_mask; 5328c6fd2807SJeff Garzik int i; 5329c6fd2807SJeff Garzik 5330c6fd2807SJeff Garzik done_mask = ap->qc_active ^ qc_active; 5331c6fd2807SJeff Garzik 5332c6fd2807SJeff Garzik if (unlikely(done_mask & qc_active)) { 5333c6fd2807SJeff Garzik ata_port_printk(ap, KERN_ERR, "illegal qc_active transition " 5334c6fd2807SJeff Garzik "(%08x->%08x)\n", ap->qc_active, qc_active); 5335c6fd2807SJeff Garzik return -EINVAL; 5336c6fd2807SJeff Garzik } 5337c6fd2807SJeff Garzik 5338c6fd2807SJeff Garzik for (i = 0; i < ATA_MAX_QUEUE; i++) { 5339c6fd2807SJeff Garzik struct ata_queued_cmd *qc; 5340c6fd2807SJeff Garzik 5341c6fd2807SJeff Garzik if (!(done_mask & (1 << i))) 5342c6fd2807SJeff Garzik continue; 5343c6fd2807SJeff Garzik 5344c6fd2807SJeff Garzik if ((qc = ata_qc_from_tag(ap, i))) { 5345c6fd2807SJeff Garzik if (finish_qc) 5346c6fd2807SJeff Garzik finish_qc(qc); 5347c6fd2807SJeff Garzik ata_qc_complete(qc); 5348c6fd2807SJeff Garzik nr_done++; 5349c6fd2807SJeff Garzik } 5350c6fd2807SJeff Garzik } 5351c6fd2807SJeff Garzik 5352c6fd2807SJeff Garzik return nr_done; 5353c6fd2807SJeff Garzik } 5354c6fd2807SJeff Garzik 5355c6fd2807SJeff Garzik static inline int ata_should_dma_map(struct ata_queued_cmd *qc) 5356c6fd2807SJeff Garzik { 5357c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 5358c6fd2807SJeff Garzik 5359c6fd2807SJeff Garzik switch (qc->tf.protocol) { 5360c6fd2807SJeff Garzik case ATA_PROT_NCQ: 5361c6fd2807SJeff Garzik case ATA_PROT_DMA: 5362c6fd2807SJeff Garzik case ATA_PROT_ATAPI_DMA: 5363c6fd2807SJeff Garzik return 1; 5364c6fd2807SJeff Garzik 5365c6fd2807SJeff Garzik case ATA_PROT_ATAPI: 5366c6fd2807SJeff Garzik case ATA_PROT_PIO: 5367c6fd2807SJeff Garzik if (ap->flags & ATA_FLAG_PIO_DMA) 5368c6fd2807SJeff Garzik return 1; 5369c6fd2807SJeff Garzik 5370c6fd2807SJeff Garzik /* fall through */ 5371c6fd2807SJeff Garzik 5372c6fd2807SJeff Garzik default: 5373c6fd2807SJeff Garzik return 0; 5374c6fd2807SJeff Garzik } 5375c6fd2807SJeff Garzik 5376c6fd2807SJeff Garzik /* never reached */ 5377c6fd2807SJeff Garzik } 5378c6fd2807SJeff Garzik 5379c6fd2807SJeff Garzik /** 5380c6fd2807SJeff Garzik * ata_qc_issue - issue taskfile to device 5381c6fd2807SJeff Garzik * @qc: command to issue to device 5382c6fd2807SJeff Garzik * 5383c6fd2807SJeff Garzik * Prepare an ATA command to submission to device. 5384c6fd2807SJeff Garzik * This includes mapping the data into a DMA-able 5385c6fd2807SJeff Garzik * area, filling in the S/G table, and finally 5386c6fd2807SJeff Garzik * writing the taskfile to hardware, starting the command. 5387c6fd2807SJeff Garzik * 5388c6fd2807SJeff Garzik * LOCKING: 5389cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 5390c6fd2807SJeff Garzik */ 5391c6fd2807SJeff Garzik void ata_qc_issue(struct ata_queued_cmd *qc) 5392c6fd2807SJeff Garzik { 5393c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 5394c6fd2807SJeff Garzik 5395c6fd2807SJeff Garzik /* Make sure only one non-NCQ command is outstanding. The 5396c6fd2807SJeff Garzik * check is skipped for old EH because it reuses active qc to 5397c6fd2807SJeff Garzik * request ATAPI sense. 5398c6fd2807SJeff Garzik */ 5399c6fd2807SJeff Garzik WARN_ON(ap->ops->error_handler && ata_tag_valid(ap->active_tag)); 5400c6fd2807SJeff Garzik 5401c6fd2807SJeff Garzik if (qc->tf.protocol == ATA_PROT_NCQ) { 5402c6fd2807SJeff Garzik WARN_ON(ap->sactive & (1 << qc->tag)); 5403c6fd2807SJeff Garzik ap->sactive |= 1 << qc->tag; 5404c6fd2807SJeff Garzik } else { 5405c6fd2807SJeff Garzik WARN_ON(ap->sactive); 5406c6fd2807SJeff Garzik ap->active_tag = qc->tag; 5407c6fd2807SJeff Garzik } 5408c6fd2807SJeff Garzik 5409c6fd2807SJeff Garzik qc->flags |= ATA_QCFLAG_ACTIVE; 5410c6fd2807SJeff Garzik ap->qc_active |= 1 << qc->tag; 5411c6fd2807SJeff Garzik 5412c6fd2807SJeff Garzik if (ata_should_dma_map(qc)) { 5413c6fd2807SJeff Garzik if (qc->flags & ATA_QCFLAG_SG) { 5414c6fd2807SJeff Garzik if (ata_sg_setup(qc)) 5415c6fd2807SJeff Garzik goto sg_err; 5416c6fd2807SJeff Garzik } else if (qc->flags & ATA_QCFLAG_SINGLE) { 5417c6fd2807SJeff Garzik if (ata_sg_setup_one(qc)) 5418c6fd2807SJeff Garzik goto sg_err; 5419c6fd2807SJeff Garzik } 5420c6fd2807SJeff Garzik } else { 5421c6fd2807SJeff Garzik qc->flags &= ~ATA_QCFLAG_DMAMAP; 5422c6fd2807SJeff Garzik } 5423c6fd2807SJeff Garzik 5424c6fd2807SJeff Garzik ap->ops->qc_prep(qc); 5425c6fd2807SJeff Garzik 5426c6fd2807SJeff Garzik qc->err_mask |= ap->ops->qc_issue(qc); 5427c6fd2807SJeff Garzik if (unlikely(qc->err_mask)) 5428c6fd2807SJeff Garzik goto err; 5429c6fd2807SJeff Garzik return; 5430c6fd2807SJeff Garzik 5431c6fd2807SJeff Garzik sg_err: 5432c6fd2807SJeff Garzik qc->flags &= ~ATA_QCFLAG_DMAMAP; 5433c6fd2807SJeff Garzik qc->err_mask |= AC_ERR_SYSTEM; 5434c6fd2807SJeff Garzik err: 5435c6fd2807SJeff Garzik ata_qc_complete(qc); 5436c6fd2807SJeff Garzik } 5437c6fd2807SJeff Garzik 5438c6fd2807SJeff Garzik /** 5439c6fd2807SJeff Garzik * ata_qc_issue_prot - issue taskfile to device in proto-dependent manner 5440c6fd2807SJeff Garzik * @qc: command to issue to device 5441c6fd2807SJeff Garzik * 5442c6fd2807SJeff Garzik * Using various libata functions and hooks, this function 5443c6fd2807SJeff Garzik * starts an ATA command. ATA commands are grouped into 5444c6fd2807SJeff Garzik * classes called "protocols", and issuing each type of protocol 5445c6fd2807SJeff Garzik * is slightly different. 5446c6fd2807SJeff Garzik * 5447c6fd2807SJeff Garzik * May be used as the qc_issue() entry in ata_port_operations. 5448c6fd2807SJeff Garzik * 5449c6fd2807SJeff Garzik * LOCKING: 5450cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 5451c6fd2807SJeff Garzik * 5452c6fd2807SJeff Garzik * RETURNS: 5453c6fd2807SJeff Garzik * Zero on success, AC_ERR_* mask on failure 5454c6fd2807SJeff Garzik */ 5455c6fd2807SJeff Garzik 5456c6fd2807SJeff Garzik unsigned int ata_qc_issue_prot(struct ata_queued_cmd *qc) 5457c6fd2807SJeff Garzik { 5458c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 5459c6fd2807SJeff Garzik 5460c6fd2807SJeff Garzik /* Use polling pio if the LLD doesn't handle 5461c6fd2807SJeff Garzik * interrupt driven pio and atapi CDB interrupt. 5462c6fd2807SJeff Garzik */ 5463c6fd2807SJeff Garzik if (ap->flags & ATA_FLAG_PIO_POLLING) { 5464c6fd2807SJeff Garzik switch (qc->tf.protocol) { 5465c6fd2807SJeff Garzik case ATA_PROT_PIO: 5466e3472cbeSAlbert Lee case ATA_PROT_NODATA: 5467c6fd2807SJeff Garzik case ATA_PROT_ATAPI: 5468c6fd2807SJeff Garzik case ATA_PROT_ATAPI_NODATA: 5469c6fd2807SJeff Garzik qc->tf.flags |= ATA_TFLAG_POLLING; 5470c6fd2807SJeff Garzik break; 5471c6fd2807SJeff Garzik case ATA_PROT_ATAPI_DMA: 5472c6fd2807SJeff Garzik if (qc->dev->flags & ATA_DFLAG_CDB_INTR) 5473c6fd2807SJeff Garzik /* see ata_dma_blacklisted() */ 5474c6fd2807SJeff Garzik BUG(); 5475c6fd2807SJeff Garzik break; 5476c6fd2807SJeff Garzik default: 5477c6fd2807SJeff Garzik break; 5478c6fd2807SJeff Garzik } 5479c6fd2807SJeff Garzik } 5480c6fd2807SJeff Garzik 5481c6fd2807SJeff Garzik /* select the device */ 5482c6fd2807SJeff Garzik ata_dev_select(ap, qc->dev->devno, 1, 0); 5483c6fd2807SJeff Garzik 5484c6fd2807SJeff Garzik /* start the command */ 5485c6fd2807SJeff Garzik switch (qc->tf.protocol) { 5486c6fd2807SJeff Garzik case ATA_PROT_NODATA: 5487c6fd2807SJeff Garzik if (qc->tf.flags & ATA_TFLAG_POLLING) 5488c6fd2807SJeff Garzik ata_qc_set_polling(qc); 5489c6fd2807SJeff Garzik 5490c6fd2807SJeff Garzik ata_tf_to_host(ap, &qc->tf); 5491c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_LAST; 5492c6fd2807SJeff Garzik 5493c6fd2807SJeff Garzik if (qc->tf.flags & ATA_TFLAG_POLLING) 5494c6fd2807SJeff Garzik ata_port_queue_task(ap, ata_pio_task, qc, 0); 5495c6fd2807SJeff Garzik 5496c6fd2807SJeff Garzik break; 5497c6fd2807SJeff Garzik 5498c6fd2807SJeff Garzik case ATA_PROT_DMA: 5499c6fd2807SJeff Garzik WARN_ON(qc->tf.flags & ATA_TFLAG_POLLING); 5500c6fd2807SJeff Garzik 5501c6fd2807SJeff Garzik ap->ops->tf_load(ap, &qc->tf); /* load tf registers */ 5502c6fd2807SJeff Garzik ap->ops->bmdma_setup(qc); /* set up bmdma */ 5503c6fd2807SJeff Garzik ap->ops->bmdma_start(qc); /* initiate bmdma */ 5504c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_LAST; 5505c6fd2807SJeff Garzik break; 5506c6fd2807SJeff Garzik 5507c6fd2807SJeff Garzik case ATA_PROT_PIO: 5508c6fd2807SJeff Garzik if (qc->tf.flags & ATA_TFLAG_POLLING) 5509c6fd2807SJeff Garzik ata_qc_set_polling(qc); 5510c6fd2807SJeff Garzik 5511c6fd2807SJeff Garzik ata_tf_to_host(ap, &qc->tf); 5512c6fd2807SJeff Garzik 5513c6fd2807SJeff Garzik if (qc->tf.flags & ATA_TFLAG_WRITE) { 5514c6fd2807SJeff Garzik /* PIO data out protocol */ 5515c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_FIRST; 5516c6fd2807SJeff Garzik ata_port_queue_task(ap, ata_pio_task, qc, 0); 5517c6fd2807SJeff Garzik 5518c6fd2807SJeff Garzik /* always send first data block using 5519c6fd2807SJeff Garzik * the ata_pio_task() codepath. 5520c6fd2807SJeff Garzik */ 5521c6fd2807SJeff Garzik } else { 5522c6fd2807SJeff Garzik /* PIO data in protocol */ 5523c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST; 5524c6fd2807SJeff Garzik 5525c6fd2807SJeff Garzik if (qc->tf.flags & ATA_TFLAG_POLLING) 5526c6fd2807SJeff Garzik ata_port_queue_task(ap, ata_pio_task, qc, 0); 5527c6fd2807SJeff Garzik 5528c6fd2807SJeff Garzik /* if polling, ata_pio_task() handles the rest. 5529c6fd2807SJeff Garzik * otherwise, interrupt handler takes over from here. 5530c6fd2807SJeff Garzik */ 5531c6fd2807SJeff Garzik } 5532c6fd2807SJeff Garzik 5533c6fd2807SJeff Garzik break; 5534c6fd2807SJeff Garzik 5535c6fd2807SJeff Garzik case ATA_PROT_ATAPI: 5536c6fd2807SJeff Garzik case ATA_PROT_ATAPI_NODATA: 5537c6fd2807SJeff Garzik if (qc->tf.flags & ATA_TFLAG_POLLING) 5538c6fd2807SJeff Garzik ata_qc_set_polling(qc); 5539c6fd2807SJeff Garzik 5540c6fd2807SJeff Garzik ata_tf_to_host(ap, &qc->tf); 5541c6fd2807SJeff Garzik 5542c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_FIRST; 5543c6fd2807SJeff Garzik 5544c6fd2807SJeff Garzik /* send cdb by polling if no cdb interrupt */ 5545c6fd2807SJeff Garzik if ((!(qc->dev->flags & ATA_DFLAG_CDB_INTR)) || 5546c6fd2807SJeff Garzik (qc->tf.flags & ATA_TFLAG_POLLING)) 5547c6fd2807SJeff Garzik ata_port_queue_task(ap, ata_pio_task, qc, 0); 5548c6fd2807SJeff Garzik break; 5549c6fd2807SJeff Garzik 5550c6fd2807SJeff Garzik case ATA_PROT_ATAPI_DMA: 5551c6fd2807SJeff Garzik WARN_ON(qc->tf.flags & ATA_TFLAG_POLLING); 5552c6fd2807SJeff Garzik 5553c6fd2807SJeff Garzik ap->ops->tf_load(ap, &qc->tf); /* load tf registers */ 5554c6fd2807SJeff Garzik ap->ops->bmdma_setup(qc); /* set up bmdma */ 5555c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_FIRST; 5556c6fd2807SJeff Garzik 5557c6fd2807SJeff Garzik /* send cdb by polling if no cdb interrupt */ 5558c6fd2807SJeff Garzik if (!(qc->dev->flags & ATA_DFLAG_CDB_INTR)) 5559c6fd2807SJeff Garzik ata_port_queue_task(ap, ata_pio_task, qc, 0); 5560c6fd2807SJeff Garzik break; 5561c6fd2807SJeff Garzik 5562c6fd2807SJeff Garzik default: 5563c6fd2807SJeff Garzik WARN_ON(1); 5564c6fd2807SJeff Garzik return AC_ERR_SYSTEM; 5565c6fd2807SJeff Garzik } 5566c6fd2807SJeff Garzik 5567c6fd2807SJeff Garzik return 0; 5568c6fd2807SJeff Garzik } 5569c6fd2807SJeff Garzik 5570c6fd2807SJeff Garzik /** 5571c6fd2807SJeff Garzik * ata_host_intr - Handle host interrupt for given (port, task) 5572c6fd2807SJeff Garzik * @ap: Port on which interrupt arrived (possibly...) 5573c6fd2807SJeff Garzik * @qc: Taskfile currently active in engine 5574c6fd2807SJeff Garzik * 5575c6fd2807SJeff Garzik * Handle host interrupt for given queued command. Currently, 5576c6fd2807SJeff Garzik * only DMA interrupts are handled. All other commands are 5577c6fd2807SJeff Garzik * handled via polling with interrupts disabled (nIEN bit). 5578c6fd2807SJeff Garzik * 5579c6fd2807SJeff Garzik * LOCKING: 5580cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 5581c6fd2807SJeff Garzik * 5582c6fd2807SJeff Garzik * RETURNS: 5583c6fd2807SJeff Garzik * One if interrupt was handled, zero if not (shared irq). 5584c6fd2807SJeff Garzik */ 5585c6fd2807SJeff Garzik 5586c6fd2807SJeff Garzik inline unsigned int ata_host_intr (struct ata_port *ap, 5587c6fd2807SJeff Garzik struct ata_queued_cmd *qc) 5588c6fd2807SJeff Garzik { 5589ea54763fSTejun Heo struct ata_eh_info *ehi = &ap->eh_info; 5590c6fd2807SJeff Garzik u8 status, host_stat = 0; 5591c6fd2807SJeff Garzik 5592c6fd2807SJeff Garzik VPRINTK("ata%u: protocol %d task_state %d\n", 559344877b4eSTejun Heo ap->print_id, qc->tf.protocol, ap->hsm_task_state); 5594c6fd2807SJeff Garzik 5595c6fd2807SJeff Garzik /* Check whether we are expecting interrupt in this state */ 5596c6fd2807SJeff Garzik switch (ap->hsm_task_state) { 5597c6fd2807SJeff Garzik case HSM_ST_FIRST: 5598c6fd2807SJeff Garzik /* Some pre-ATAPI-4 devices assert INTRQ 5599c6fd2807SJeff Garzik * at this state when ready to receive CDB. 5600c6fd2807SJeff Garzik */ 5601c6fd2807SJeff Garzik 5602c6fd2807SJeff Garzik /* Check the ATA_DFLAG_CDB_INTR flag is enough here. 5603c6fd2807SJeff Garzik * The flag was turned on only for atapi devices. 5604c6fd2807SJeff Garzik * No need to check is_atapi_taskfile(&qc->tf) again. 5605c6fd2807SJeff Garzik */ 5606c6fd2807SJeff Garzik if (!(qc->dev->flags & ATA_DFLAG_CDB_INTR)) 5607c6fd2807SJeff Garzik goto idle_irq; 5608c6fd2807SJeff Garzik break; 5609c6fd2807SJeff Garzik case HSM_ST_LAST: 5610c6fd2807SJeff Garzik if (qc->tf.protocol == ATA_PROT_DMA || 5611c6fd2807SJeff Garzik qc->tf.protocol == ATA_PROT_ATAPI_DMA) { 5612c6fd2807SJeff Garzik /* check status of DMA engine */ 5613c6fd2807SJeff Garzik host_stat = ap->ops->bmdma_status(ap); 561444877b4eSTejun Heo VPRINTK("ata%u: host_stat 0x%X\n", 561544877b4eSTejun Heo ap->print_id, host_stat); 5616c6fd2807SJeff Garzik 5617c6fd2807SJeff Garzik /* if it's not our irq... */ 5618c6fd2807SJeff Garzik if (!(host_stat & ATA_DMA_INTR)) 5619c6fd2807SJeff Garzik goto idle_irq; 5620c6fd2807SJeff Garzik 5621c6fd2807SJeff Garzik /* before we do anything else, clear DMA-Start bit */ 5622c6fd2807SJeff Garzik ap->ops->bmdma_stop(qc); 5623c6fd2807SJeff Garzik 5624c6fd2807SJeff Garzik if (unlikely(host_stat & ATA_DMA_ERR)) { 5625c6fd2807SJeff Garzik /* error when transfering data to/from memory */ 5626c6fd2807SJeff Garzik qc->err_mask |= AC_ERR_HOST_BUS; 5627c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_ERR; 5628c6fd2807SJeff Garzik } 5629c6fd2807SJeff Garzik } 5630c6fd2807SJeff Garzik break; 5631c6fd2807SJeff Garzik case HSM_ST: 5632c6fd2807SJeff Garzik break; 5633c6fd2807SJeff Garzik default: 5634c6fd2807SJeff Garzik goto idle_irq; 5635c6fd2807SJeff Garzik } 5636c6fd2807SJeff Garzik 5637c6fd2807SJeff Garzik /* check altstatus */ 5638c6fd2807SJeff Garzik status = ata_altstatus(ap); 5639c6fd2807SJeff Garzik if (status & ATA_BUSY) 5640c6fd2807SJeff Garzik goto idle_irq; 5641c6fd2807SJeff Garzik 5642c6fd2807SJeff Garzik /* check main status, clearing INTRQ */ 5643c6fd2807SJeff Garzik status = ata_chk_status(ap); 5644c6fd2807SJeff Garzik if (unlikely(status & ATA_BUSY)) 5645c6fd2807SJeff Garzik goto idle_irq; 5646c6fd2807SJeff Garzik 5647c6fd2807SJeff Garzik /* ack bmdma irq events */ 5648c6fd2807SJeff Garzik ap->ops->irq_clear(ap); 5649c6fd2807SJeff Garzik 5650c6fd2807SJeff Garzik ata_hsm_move(ap, qc, status, 0); 5651ea54763fSTejun Heo 5652ea54763fSTejun Heo if (unlikely(qc->err_mask) && (qc->tf.protocol == ATA_PROT_DMA || 5653ea54763fSTejun Heo qc->tf.protocol == ATA_PROT_ATAPI_DMA)) 5654ea54763fSTejun Heo ata_ehi_push_desc(ehi, "BMDMA stat 0x%x", host_stat); 5655ea54763fSTejun Heo 5656c6fd2807SJeff Garzik return 1; /* irq handled */ 5657c6fd2807SJeff Garzik 5658c6fd2807SJeff Garzik idle_irq: 5659c6fd2807SJeff Garzik ap->stats.idle_irq++; 5660c6fd2807SJeff Garzik 5661c6fd2807SJeff Garzik #ifdef ATA_IRQ_TRAP 5662c6fd2807SJeff Garzik if ((ap->stats.idle_irq % 1000) == 0) { 566383625006SAkira Iguchi ap->ops->irq_ack(ap, 0); /* debug trap */ 5664c6fd2807SJeff Garzik ata_port_printk(ap, KERN_WARNING, "irq trap\n"); 5665c6fd2807SJeff Garzik return 1; 5666c6fd2807SJeff Garzik } 5667c6fd2807SJeff Garzik #endif 5668c6fd2807SJeff Garzik return 0; /* irq not handled */ 5669c6fd2807SJeff Garzik } 5670c6fd2807SJeff Garzik 5671c6fd2807SJeff Garzik /** 5672c6fd2807SJeff Garzik * ata_interrupt - Default ATA host interrupt handler 5673c6fd2807SJeff Garzik * @irq: irq line (unused) 5674cca3974eSJeff Garzik * @dev_instance: pointer to our ata_host information structure 5675c6fd2807SJeff Garzik * 5676c6fd2807SJeff Garzik * Default interrupt handler for PCI IDE devices. Calls 5677c6fd2807SJeff Garzik * ata_host_intr() for each port that is not disabled. 5678c6fd2807SJeff Garzik * 5679c6fd2807SJeff Garzik * LOCKING: 5680cca3974eSJeff Garzik * Obtains host lock during operation. 5681c6fd2807SJeff Garzik * 5682c6fd2807SJeff Garzik * RETURNS: 5683c6fd2807SJeff Garzik * IRQ_NONE or IRQ_HANDLED. 5684c6fd2807SJeff Garzik */ 5685c6fd2807SJeff Garzik 56867d12e780SDavid Howells irqreturn_t ata_interrupt (int irq, void *dev_instance) 5687c6fd2807SJeff Garzik { 5688cca3974eSJeff Garzik struct ata_host *host = dev_instance; 5689c6fd2807SJeff Garzik unsigned int i; 5690c6fd2807SJeff Garzik unsigned int handled = 0; 5691c6fd2807SJeff Garzik unsigned long flags; 5692c6fd2807SJeff Garzik 5693c6fd2807SJeff Garzik /* TODO: make _irqsave conditional on x86 PCI IDE legacy mode */ 5694cca3974eSJeff Garzik spin_lock_irqsave(&host->lock, flags); 5695c6fd2807SJeff Garzik 5696cca3974eSJeff Garzik for (i = 0; i < host->n_ports; i++) { 5697c6fd2807SJeff Garzik struct ata_port *ap; 5698c6fd2807SJeff Garzik 5699cca3974eSJeff Garzik ap = host->ports[i]; 5700c6fd2807SJeff Garzik if (ap && 5701c6fd2807SJeff Garzik !(ap->flags & ATA_FLAG_DISABLED)) { 5702c6fd2807SJeff Garzik struct ata_queued_cmd *qc; 5703c6fd2807SJeff Garzik 5704c6fd2807SJeff Garzik qc = ata_qc_from_tag(ap, ap->active_tag); 5705c6fd2807SJeff Garzik if (qc && (!(qc->tf.flags & ATA_TFLAG_POLLING)) && 5706c6fd2807SJeff Garzik (qc->flags & ATA_QCFLAG_ACTIVE)) 5707c6fd2807SJeff Garzik handled |= ata_host_intr(ap, qc); 5708c6fd2807SJeff Garzik } 5709c6fd2807SJeff Garzik } 5710c6fd2807SJeff Garzik 5711cca3974eSJeff Garzik spin_unlock_irqrestore(&host->lock, flags); 5712c6fd2807SJeff Garzik 5713c6fd2807SJeff Garzik return IRQ_RETVAL(handled); 5714c6fd2807SJeff Garzik } 5715c6fd2807SJeff Garzik 5716c6fd2807SJeff Garzik /** 5717c6fd2807SJeff Garzik * sata_scr_valid - test whether SCRs are accessible 5718c6fd2807SJeff Garzik * @ap: ATA port to test SCR accessibility for 5719c6fd2807SJeff Garzik * 5720c6fd2807SJeff Garzik * Test whether SCRs are accessible for @ap. 5721c6fd2807SJeff Garzik * 5722c6fd2807SJeff Garzik * LOCKING: 5723c6fd2807SJeff Garzik * None. 5724c6fd2807SJeff Garzik * 5725c6fd2807SJeff Garzik * RETURNS: 5726c6fd2807SJeff Garzik * 1 if SCRs are accessible, 0 otherwise. 5727c6fd2807SJeff Garzik */ 5728c6fd2807SJeff Garzik int sata_scr_valid(struct ata_port *ap) 5729c6fd2807SJeff Garzik { 5730a16abc0bSTejun Heo return (ap->flags & ATA_FLAG_SATA) && ap->ops->scr_read; 5731c6fd2807SJeff Garzik } 5732c6fd2807SJeff Garzik 5733c6fd2807SJeff Garzik /** 5734c6fd2807SJeff Garzik * sata_scr_read - read SCR register of the specified port 5735c6fd2807SJeff Garzik * @ap: ATA port to read SCR for 5736c6fd2807SJeff Garzik * @reg: SCR to read 5737c6fd2807SJeff Garzik * @val: Place to store read value 5738c6fd2807SJeff Garzik * 5739c6fd2807SJeff Garzik * Read SCR register @reg of @ap into *@val. This function is 5740c6fd2807SJeff Garzik * guaranteed to succeed if the cable type of the port is SATA 5741c6fd2807SJeff Garzik * and the port implements ->scr_read. 5742c6fd2807SJeff Garzik * 5743c6fd2807SJeff Garzik * LOCKING: 5744c6fd2807SJeff Garzik * None. 5745c6fd2807SJeff Garzik * 5746c6fd2807SJeff Garzik * RETURNS: 5747c6fd2807SJeff Garzik * 0 on success, negative errno on failure. 5748c6fd2807SJeff Garzik */ 5749c6fd2807SJeff Garzik int sata_scr_read(struct ata_port *ap, int reg, u32 *val) 5750c6fd2807SJeff Garzik { 5751da3dbb17STejun Heo if (sata_scr_valid(ap)) 5752da3dbb17STejun Heo return ap->ops->scr_read(ap, reg, val); 5753c6fd2807SJeff Garzik return -EOPNOTSUPP; 5754c6fd2807SJeff Garzik } 5755c6fd2807SJeff Garzik 5756c6fd2807SJeff Garzik /** 5757c6fd2807SJeff Garzik * sata_scr_write - write SCR register of the specified port 5758c6fd2807SJeff Garzik * @ap: ATA port to write SCR for 5759c6fd2807SJeff Garzik * @reg: SCR to write 5760c6fd2807SJeff Garzik * @val: value to write 5761c6fd2807SJeff Garzik * 5762c6fd2807SJeff Garzik * Write @val to SCR register @reg of @ap. This function is 5763c6fd2807SJeff Garzik * guaranteed to succeed if the cable type of the port is SATA 5764c6fd2807SJeff Garzik * and the port implements ->scr_read. 5765c6fd2807SJeff Garzik * 5766c6fd2807SJeff Garzik * LOCKING: 5767c6fd2807SJeff Garzik * None. 5768c6fd2807SJeff Garzik * 5769c6fd2807SJeff Garzik * RETURNS: 5770c6fd2807SJeff Garzik * 0 on success, negative errno on failure. 5771c6fd2807SJeff Garzik */ 5772c6fd2807SJeff Garzik int sata_scr_write(struct ata_port *ap, int reg, u32 val) 5773c6fd2807SJeff Garzik { 5774da3dbb17STejun Heo if (sata_scr_valid(ap)) 5775da3dbb17STejun Heo return ap->ops->scr_write(ap, reg, val); 5776c6fd2807SJeff Garzik return -EOPNOTSUPP; 5777c6fd2807SJeff Garzik } 5778c6fd2807SJeff Garzik 5779c6fd2807SJeff Garzik /** 5780c6fd2807SJeff Garzik * sata_scr_write_flush - write SCR register of the specified port and flush 5781c6fd2807SJeff Garzik * @ap: ATA port to write SCR for 5782c6fd2807SJeff Garzik * @reg: SCR to write 5783c6fd2807SJeff Garzik * @val: value to write 5784c6fd2807SJeff Garzik * 5785c6fd2807SJeff Garzik * This function is identical to sata_scr_write() except that this 5786c6fd2807SJeff Garzik * function performs flush after writing to the register. 5787c6fd2807SJeff Garzik * 5788c6fd2807SJeff Garzik * LOCKING: 5789c6fd2807SJeff Garzik * None. 5790c6fd2807SJeff Garzik * 5791c6fd2807SJeff Garzik * RETURNS: 5792c6fd2807SJeff Garzik * 0 on success, negative errno on failure. 5793c6fd2807SJeff Garzik */ 5794c6fd2807SJeff Garzik int sata_scr_write_flush(struct ata_port *ap, int reg, u32 val) 5795c6fd2807SJeff Garzik { 5796da3dbb17STejun Heo int rc; 5797da3dbb17STejun Heo 5798c6fd2807SJeff Garzik if (sata_scr_valid(ap)) { 5799da3dbb17STejun Heo rc = ap->ops->scr_write(ap, reg, val); 5800da3dbb17STejun Heo if (rc == 0) 5801da3dbb17STejun Heo rc = ap->ops->scr_read(ap, reg, &val); 5802da3dbb17STejun Heo return rc; 5803c6fd2807SJeff Garzik } 5804c6fd2807SJeff Garzik return -EOPNOTSUPP; 5805c6fd2807SJeff Garzik } 5806c6fd2807SJeff Garzik 5807c6fd2807SJeff Garzik /** 5808c6fd2807SJeff Garzik * ata_port_online - test whether the given port is online 5809c6fd2807SJeff Garzik * @ap: ATA port to test 5810c6fd2807SJeff Garzik * 5811c6fd2807SJeff Garzik * Test whether @ap is online. Note that this function returns 0 5812c6fd2807SJeff Garzik * if online status of @ap cannot be obtained, so 5813c6fd2807SJeff Garzik * ata_port_online(ap) != !ata_port_offline(ap). 5814c6fd2807SJeff Garzik * 5815c6fd2807SJeff Garzik * LOCKING: 5816c6fd2807SJeff Garzik * None. 5817c6fd2807SJeff Garzik * 5818c6fd2807SJeff Garzik * RETURNS: 5819c6fd2807SJeff Garzik * 1 if the port online status is available and online. 5820c6fd2807SJeff Garzik */ 5821c6fd2807SJeff Garzik int ata_port_online(struct ata_port *ap) 5822c6fd2807SJeff Garzik { 5823c6fd2807SJeff Garzik u32 sstatus; 5824c6fd2807SJeff Garzik 5825c6fd2807SJeff Garzik if (!sata_scr_read(ap, SCR_STATUS, &sstatus) && (sstatus & 0xf) == 0x3) 5826c6fd2807SJeff Garzik return 1; 5827c6fd2807SJeff Garzik return 0; 5828c6fd2807SJeff Garzik } 5829c6fd2807SJeff Garzik 5830c6fd2807SJeff Garzik /** 5831c6fd2807SJeff Garzik * ata_port_offline - test whether the given port is offline 5832c6fd2807SJeff Garzik * @ap: ATA port to test 5833c6fd2807SJeff Garzik * 5834c6fd2807SJeff Garzik * Test whether @ap is offline. Note that this function returns 5835c6fd2807SJeff Garzik * 0 if offline status of @ap cannot be obtained, so 5836c6fd2807SJeff Garzik * ata_port_online(ap) != !ata_port_offline(ap). 5837c6fd2807SJeff Garzik * 5838c6fd2807SJeff Garzik * LOCKING: 5839c6fd2807SJeff Garzik * None. 5840c6fd2807SJeff Garzik * 5841c6fd2807SJeff Garzik * RETURNS: 5842c6fd2807SJeff Garzik * 1 if the port offline status is available and offline. 5843c6fd2807SJeff Garzik */ 5844c6fd2807SJeff Garzik int ata_port_offline(struct ata_port *ap) 5845c6fd2807SJeff Garzik { 5846c6fd2807SJeff Garzik u32 sstatus; 5847c6fd2807SJeff Garzik 5848c6fd2807SJeff Garzik if (!sata_scr_read(ap, SCR_STATUS, &sstatus) && (sstatus & 0xf) != 0x3) 5849c6fd2807SJeff Garzik return 1; 5850c6fd2807SJeff Garzik return 0; 5851c6fd2807SJeff Garzik } 5852c6fd2807SJeff Garzik 5853c6fd2807SJeff Garzik int ata_flush_cache(struct ata_device *dev) 5854c6fd2807SJeff Garzik { 5855c6fd2807SJeff Garzik unsigned int err_mask; 5856c6fd2807SJeff Garzik u8 cmd; 5857c6fd2807SJeff Garzik 5858c6fd2807SJeff Garzik if (!ata_try_flush_cache(dev)) 5859c6fd2807SJeff Garzik return 0; 5860c6fd2807SJeff Garzik 58616fc49adbSTejun Heo if (dev->flags & ATA_DFLAG_FLUSH_EXT) 5862c6fd2807SJeff Garzik cmd = ATA_CMD_FLUSH_EXT; 5863c6fd2807SJeff Garzik else 5864c6fd2807SJeff Garzik cmd = ATA_CMD_FLUSH; 5865c6fd2807SJeff Garzik 5866c6fd2807SJeff Garzik err_mask = ata_do_simple_cmd(dev, cmd); 5867c6fd2807SJeff Garzik if (err_mask) { 5868c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_ERR, "failed to flush cache\n"); 5869c6fd2807SJeff Garzik return -EIO; 5870c6fd2807SJeff Garzik } 5871c6fd2807SJeff Garzik 5872c6fd2807SJeff Garzik return 0; 5873c6fd2807SJeff Garzik } 5874c6fd2807SJeff Garzik 58756ffa01d8STejun Heo #ifdef CONFIG_PM 5876cca3974eSJeff Garzik static int ata_host_request_pm(struct ata_host *host, pm_message_t mesg, 5877cca3974eSJeff Garzik unsigned int action, unsigned int ehi_flags, 5878cca3974eSJeff Garzik int wait) 5879c6fd2807SJeff Garzik { 5880c6fd2807SJeff Garzik unsigned long flags; 5881c6fd2807SJeff Garzik int i, rc; 5882c6fd2807SJeff Garzik 5883cca3974eSJeff Garzik for (i = 0; i < host->n_ports; i++) { 5884cca3974eSJeff Garzik struct ata_port *ap = host->ports[i]; 5885c6fd2807SJeff Garzik 5886c6fd2807SJeff Garzik /* Previous resume operation might still be in 5887c6fd2807SJeff Garzik * progress. Wait for PM_PENDING to clear. 5888c6fd2807SJeff Garzik */ 5889c6fd2807SJeff Garzik if (ap->pflags & ATA_PFLAG_PM_PENDING) { 5890c6fd2807SJeff Garzik ata_port_wait_eh(ap); 5891c6fd2807SJeff Garzik WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING); 5892c6fd2807SJeff Garzik } 5893c6fd2807SJeff Garzik 5894c6fd2807SJeff Garzik /* request PM ops to EH */ 5895c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 5896c6fd2807SJeff Garzik 5897c6fd2807SJeff Garzik ap->pm_mesg = mesg; 5898c6fd2807SJeff Garzik if (wait) { 5899c6fd2807SJeff Garzik rc = 0; 5900c6fd2807SJeff Garzik ap->pm_result = &rc; 5901c6fd2807SJeff Garzik } 5902c6fd2807SJeff Garzik 5903c6fd2807SJeff Garzik ap->pflags |= ATA_PFLAG_PM_PENDING; 5904c6fd2807SJeff Garzik ap->eh_info.action |= action; 5905c6fd2807SJeff Garzik ap->eh_info.flags |= ehi_flags; 5906c6fd2807SJeff Garzik 5907c6fd2807SJeff Garzik ata_port_schedule_eh(ap); 5908c6fd2807SJeff Garzik 5909c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 5910c6fd2807SJeff Garzik 5911c6fd2807SJeff Garzik /* wait and check result */ 5912c6fd2807SJeff Garzik if (wait) { 5913c6fd2807SJeff Garzik ata_port_wait_eh(ap); 5914c6fd2807SJeff Garzik WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING); 5915c6fd2807SJeff Garzik if (rc) 5916c6fd2807SJeff Garzik return rc; 5917c6fd2807SJeff Garzik } 5918c6fd2807SJeff Garzik } 5919c6fd2807SJeff Garzik 5920c6fd2807SJeff Garzik return 0; 5921c6fd2807SJeff Garzik } 5922c6fd2807SJeff Garzik 5923c6fd2807SJeff Garzik /** 5924cca3974eSJeff Garzik * ata_host_suspend - suspend host 5925cca3974eSJeff Garzik * @host: host to suspend 5926c6fd2807SJeff Garzik * @mesg: PM message 5927c6fd2807SJeff Garzik * 5928cca3974eSJeff Garzik * Suspend @host. Actual operation is performed by EH. This 5929c6fd2807SJeff Garzik * function requests EH to perform PM operations and waits for EH 5930c6fd2807SJeff Garzik * to finish. 5931c6fd2807SJeff Garzik * 5932c6fd2807SJeff Garzik * LOCKING: 5933c6fd2807SJeff Garzik * Kernel thread context (may sleep). 5934c6fd2807SJeff Garzik * 5935c6fd2807SJeff Garzik * RETURNS: 5936c6fd2807SJeff Garzik * 0 on success, -errno on failure. 5937c6fd2807SJeff Garzik */ 5938cca3974eSJeff Garzik int ata_host_suspend(struct ata_host *host, pm_message_t mesg) 5939c6fd2807SJeff Garzik { 59409666f400STejun Heo int rc; 5941c6fd2807SJeff Garzik 5942cca3974eSJeff Garzik rc = ata_host_request_pm(host, mesg, 0, ATA_EHI_QUIET, 1); 59439666f400STejun Heo if (rc == 0) 5944cca3974eSJeff Garzik host->dev->power.power_state = mesg; 5945c6fd2807SJeff Garzik return rc; 5946c6fd2807SJeff Garzik } 5947c6fd2807SJeff Garzik 5948c6fd2807SJeff Garzik /** 5949cca3974eSJeff Garzik * ata_host_resume - resume host 5950cca3974eSJeff Garzik * @host: host to resume 5951c6fd2807SJeff Garzik * 5952cca3974eSJeff Garzik * Resume @host. Actual operation is performed by EH. This 5953c6fd2807SJeff Garzik * function requests EH to perform PM operations and returns. 5954c6fd2807SJeff Garzik * Note that all resume operations are performed parallely. 5955c6fd2807SJeff Garzik * 5956c6fd2807SJeff Garzik * LOCKING: 5957c6fd2807SJeff Garzik * Kernel thread context (may sleep). 5958c6fd2807SJeff Garzik */ 5959cca3974eSJeff Garzik void ata_host_resume(struct ata_host *host) 5960c6fd2807SJeff Garzik { 5961cca3974eSJeff Garzik ata_host_request_pm(host, PMSG_ON, ATA_EH_SOFTRESET, 5962c6fd2807SJeff Garzik ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET, 0); 5963cca3974eSJeff Garzik host->dev->power.power_state = PMSG_ON; 5964c6fd2807SJeff Garzik } 59656ffa01d8STejun Heo #endif 5966c6fd2807SJeff Garzik 5967c6fd2807SJeff Garzik /** 5968c6fd2807SJeff Garzik * ata_port_start - Set port up for dma. 5969c6fd2807SJeff Garzik * @ap: Port to initialize 5970c6fd2807SJeff Garzik * 5971c6fd2807SJeff Garzik * Called just after data structures for each port are 5972c6fd2807SJeff Garzik * initialized. Allocates space for PRD table. 5973c6fd2807SJeff Garzik * 5974c6fd2807SJeff Garzik * May be used as the port_start() entry in ata_port_operations. 5975c6fd2807SJeff Garzik * 5976c6fd2807SJeff Garzik * LOCKING: 5977c6fd2807SJeff Garzik * Inherited from caller. 5978c6fd2807SJeff Garzik */ 5979c6fd2807SJeff Garzik int ata_port_start(struct ata_port *ap) 5980c6fd2807SJeff Garzik { 5981c6fd2807SJeff Garzik struct device *dev = ap->dev; 5982c6fd2807SJeff Garzik int rc; 5983c6fd2807SJeff Garzik 5984f0d36efdSTejun Heo ap->prd = dmam_alloc_coherent(dev, ATA_PRD_TBL_SZ, &ap->prd_dma, 5985f0d36efdSTejun Heo GFP_KERNEL); 5986c6fd2807SJeff Garzik if (!ap->prd) 5987c6fd2807SJeff Garzik return -ENOMEM; 5988c6fd2807SJeff Garzik 5989c6fd2807SJeff Garzik rc = ata_pad_alloc(ap, dev); 5990f0d36efdSTejun Heo if (rc) 5991c6fd2807SJeff Garzik return rc; 5992c6fd2807SJeff Garzik 5993f0d36efdSTejun Heo DPRINTK("prd alloc, virt %p, dma %llx\n", ap->prd, 5994f0d36efdSTejun Heo (unsigned long long)ap->prd_dma); 5995c6fd2807SJeff Garzik return 0; 5996c6fd2807SJeff Garzik } 5997c6fd2807SJeff Garzik 5998c6fd2807SJeff Garzik /** 5999c6fd2807SJeff Garzik * ata_dev_init - Initialize an ata_device structure 6000c6fd2807SJeff Garzik * @dev: Device structure to initialize 6001c6fd2807SJeff Garzik * 6002c6fd2807SJeff Garzik * Initialize @dev in preparation for probing. 6003c6fd2807SJeff Garzik * 6004c6fd2807SJeff Garzik * LOCKING: 6005c6fd2807SJeff Garzik * Inherited from caller. 6006c6fd2807SJeff Garzik */ 6007c6fd2807SJeff Garzik void ata_dev_init(struct ata_device *dev) 6008c6fd2807SJeff Garzik { 6009c6fd2807SJeff Garzik struct ata_port *ap = dev->ap; 6010c6fd2807SJeff Garzik unsigned long flags; 6011c6fd2807SJeff Garzik 6012c6fd2807SJeff Garzik /* SATA spd limit is bound to the first device */ 6013c6fd2807SJeff Garzik ap->sata_spd_limit = ap->hw_sata_spd_limit; 6014008a7896STejun Heo ap->sata_spd = 0; 6015c6fd2807SJeff Garzik 6016c6fd2807SJeff Garzik /* High bits of dev->flags are used to record warm plug 6017c6fd2807SJeff Garzik * requests which occur asynchronously. Synchronize using 6018cca3974eSJeff Garzik * host lock. 6019c6fd2807SJeff Garzik */ 6020c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 6021c6fd2807SJeff Garzik dev->flags &= ~ATA_DFLAG_INIT_MASK; 6022c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 6023c6fd2807SJeff Garzik 6024c6fd2807SJeff Garzik memset((void *)dev + ATA_DEVICE_CLEAR_OFFSET, 0, 6025c6fd2807SJeff Garzik sizeof(*dev) - ATA_DEVICE_CLEAR_OFFSET); 6026c6fd2807SJeff Garzik dev->pio_mask = UINT_MAX; 6027c6fd2807SJeff Garzik dev->mwdma_mask = UINT_MAX; 6028c6fd2807SJeff Garzik dev->udma_mask = UINT_MAX; 6029c6fd2807SJeff Garzik } 6030c6fd2807SJeff Garzik 6031c6fd2807SJeff Garzik /** 6032f3187195STejun Heo * ata_port_alloc - allocate and initialize basic ATA port resources 6033f3187195STejun Heo * @host: ATA host this allocated port belongs to 6034c6fd2807SJeff Garzik * 6035f3187195STejun Heo * Allocate and initialize basic ATA port resources. 6036f3187195STejun Heo * 6037f3187195STejun Heo * RETURNS: 6038f3187195STejun Heo * Allocate ATA port on success, NULL on failure. 6039c6fd2807SJeff Garzik * 6040c6fd2807SJeff Garzik * LOCKING: 6041f3187195STejun Heo * Inherited from calling layer (may sleep). 6042c6fd2807SJeff Garzik */ 6043f3187195STejun Heo struct ata_port *ata_port_alloc(struct ata_host *host) 6044c6fd2807SJeff Garzik { 6045f3187195STejun Heo struct ata_port *ap; 6046c6fd2807SJeff Garzik unsigned int i; 6047c6fd2807SJeff Garzik 6048f3187195STejun Heo DPRINTK("ENTER\n"); 6049f3187195STejun Heo 6050f3187195STejun Heo ap = kzalloc(sizeof(*ap), GFP_KERNEL); 6051f3187195STejun Heo if (!ap) 6052f3187195STejun Heo return NULL; 6053f3187195STejun Heo 6054f4d6d004STejun Heo ap->pflags |= ATA_PFLAG_INITIALIZING; 6055cca3974eSJeff Garzik ap->lock = &host->lock; 6056c6fd2807SJeff Garzik ap->flags = ATA_FLAG_DISABLED; 6057f3187195STejun Heo ap->print_id = -1; 6058c6fd2807SJeff Garzik ap->ctl = ATA_DEVCTL_OBS; 6059cca3974eSJeff Garzik ap->host = host; 6060f3187195STejun Heo ap->dev = host->dev; 6061f3187195STejun Heo 6062c6fd2807SJeff Garzik ap->hw_sata_spd_limit = UINT_MAX; 6063c6fd2807SJeff Garzik ap->active_tag = ATA_TAG_POISON; 6064c6fd2807SJeff Garzik ap->last_ctl = 0xFF; 6065c6fd2807SJeff Garzik 6066c6fd2807SJeff Garzik #if defined(ATA_VERBOSE_DEBUG) 6067c6fd2807SJeff Garzik /* turn on all debugging levels */ 6068c6fd2807SJeff Garzik ap->msg_enable = 0x00FF; 6069c6fd2807SJeff Garzik #elif defined(ATA_DEBUG) 6070c6fd2807SJeff Garzik ap->msg_enable = ATA_MSG_DRV | ATA_MSG_INFO | ATA_MSG_CTL | ATA_MSG_WARN | ATA_MSG_ERR; 6071c6fd2807SJeff Garzik #else 6072c6fd2807SJeff Garzik ap->msg_enable = ATA_MSG_DRV | ATA_MSG_ERR | ATA_MSG_WARN; 6073c6fd2807SJeff Garzik #endif 6074c6fd2807SJeff Garzik 607565f27f38SDavid Howells INIT_DELAYED_WORK(&ap->port_task, NULL); 607665f27f38SDavid Howells INIT_DELAYED_WORK(&ap->hotplug_task, ata_scsi_hotplug); 607765f27f38SDavid Howells INIT_WORK(&ap->scsi_rescan_task, ata_scsi_dev_rescan); 6078c6fd2807SJeff Garzik INIT_LIST_HEAD(&ap->eh_done_q); 6079c6fd2807SJeff Garzik init_waitqueue_head(&ap->eh_wait_q); 60805ddf24c5STejun Heo init_timer_deferrable(&ap->fastdrain_timer); 60815ddf24c5STejun Heo ap->fastdrain_timer.function = ata_eh_fastdrain_timerfn; 60825ddf24c5STejun Heo ap->fastdrain_timer.data = (unsigned long)ap; 6083c6fd2807SJeff Garzik 6084c6fd2807SJeff Garzik ap->cbl = ATA_CBL_NONE; 6085c6fd2807SJeff Garzik 6086c6fd2807SJeff Garzik for (i = 0; i < ATA_MAX_DEVICES; i++) { 6087c6fd2807SJeff Garzik struct ata_device *dev = &ap->device[i]; 6088c6fd2807SJeff Garzik dev->ap = ap; 6089c6fd2807SJeff Garzik dev->devno = i; 6090c6fd2807SJeff Garzik ata_dev_init(dev); 6091c6fd2807SJeff Garzik } 6092c6fd2807SJeff Garzik 6093c6fd2807SJeff Garzik #ifdef ATA_IRQ_TRAP 6094c6fd2807SJeff Garzik ap->stats.unhandled_irq = 1; 6095c6fd2807SJeff Garzik ap->stats.idle_irq = 1; 6096c6fd2807SJeff Garzik #endif 6097c6fd2807SJeff Garzik return ap; 6098c6fd2807SJeff Garzik } 6099c6fd2807SJeff Garzik 6100f0d36efdSTejun Heo static void ata_host_release(struct device *gendev, void *res) 6101f0d36efdSTejun Heo { 6102f0d36efdSTejun Heo struct ata_host *host = dev_get_drvdata(gendev); 6103f0d36efdSTejun Heo int i; 6104f0d36efdSTejun Heo 6105f0d36efdSTejun Heo for (i = 0; i < host->n_ports; i++) { 6106f0d36efdSTejun Heo struct ata_port *ap = host->ports[i]; 6107f0d36efdSTejun Heo 6108ecef7253STejun Heo if (!ap) 6109ecef7253STejun Heo continue; 6110ecef7253STejun Heo 6111ecef7253STejun Heo if ((host->flags & ATA_HOST_STARTED) && ap->ops->port_stop) 6112f0d36efdSTejun Heo ap->ops->port_stop(ap); 6113f0d36efdSTejun Heo } 6114f0d36efdSTejun Heo 6115ecef7253STejun Heo if ((host->flags & ATA_HOST_STARTED) && host->ops->host_stop) 6116f0d36efdSTejun Heo host->ops->host_stop(host); 61171aa56ccaSTejun Heo 61181aa506e4STejun Heo for (i = 0; i < host->n_ports; i++) { 61191aa506e4STejun Heo struct ata_port *ap = host->ports[i]; 61201aa506e4STejun Heo 61214911487aSTejun Heo if (!ap) 61224911487aSTejun Heo continue; 61234911487aSTejun Heo 61244911487aSTejun Heo if (ap->scsi_host) 61251aa506e4STejun Heo scsi_host_put(ap->scsi_host); 61261aa506e4STejun Heo 61274911487aSTejun Heo kfree(ap); 61281aa506e4STejun Heo host->ports[i] = NULL; 61291aa506e4STejun Heo } 61301aa506e4STejun Heo 61311aa56ccaSTejun Heo dev_set_drvdata(gendev, NULL); 6132f0d36efdSTejun Heo } 6133f0d36efdSTejun Heo 6134c6fd2807SJeff Garzik /** 6135f3187195STejun Heo * ata_host_alloc - allocate and init basic ATA host resources 6136f3187195STejun Heo * @dev: generic device this host is associated with 6137f3187195STejun Heo * @max_ports: maximum number of ATA ports associated with this host 6138f3187195STejun Heo * 6139f3187195STejun Heo * Allocate and initialize basic ATA host resources. LLD calls 6140f3187195STejun Heo * this function to allocate a host, initializes it fully and 6141f3187195STejun Heo * attaches it using ata_host_register(). 6142f3187195STejun Heo * 6143f3187195STejun Heo * @max_ports ports are allocated and host->n_ports is 6144f3187195STejun Heo * initialized to @max_ports. The caller is allowed to decrease 6145f3187195STejun Heo * host->n_ports before calling ata_host_register(). The unused 6146f3187195STejun Heo * ports will be automatically freed on registration. 6147f3187195STejun Heo * 6148f3187195STejun Heo * RETURNS: 6149f3187195STejun Heo * Allocate ATA host on success, NULL on failure. 6150f3187195STejun Heo * 6151f3187195STejun Heo * LOCKING: 6152f3187195STejun Heo * Inherited from calling layer (may sleep). 6153f3187195STejun Heo */ 6154f3187195STejun Heo struct ata_host *ata_host_alloc(struct device *dev, int max_ports) 6155f3187195STejun Heo { 6156f3187195STejun Heo struct ata_host *host; 6157f3187195STejun Heo size_t sz; 6158f3187195STejun Heo int i; 6159f3187195STejun Heo 6160f3187195STejun Heo DPRINTK("ENTER\n"); 6161f3187195STejun Heo 6162f3187195STejun Heo if (!devres_open_group(dev, NULL, GFP_KERNEL)) 6163f3187195STejun Heo return NULL; 6164f3187195STejun Heo 6165f3187195STejun Heo /* alloc a container for our list of ATA ports (buses) */ 6166f3187195STejun Heo sz = sizeof(struct ata_host) + (max_ports + 1) * sizeof(void *); 6167f3187195STejun Heo /* alloc a container for our list of ATA ports (buses) */ 6168f3187195STejun Heo host = devres_alloc(ata_host_release, sz, GFP_KERNEL); 6169f3187195STejun Heo if (!host) 6170f3187195STejun Heo goto err_out; 6171f3187195STejun Heo 6172f3187195STejun Heo devres_add(dev, host); 6173f3187195STejun Heo dev_set_drvdata(dev, host); 6174f3187195STejun Heo 6175f3187195STejun Heo spin_lock_init(&host->lock); 6176f3187195STejun Heo host->dev = dev; 6177f3187195STejun Heo host->n_ports = max_ports; 6178f3187195STejun Heo 6179f3187195STejun Heo /* allocate ports bound to this host */ 6180f3187195STejun Heo for (i = 0; i < max_ports; i++) { 6181f3187195STejun Heo struct ata_port *ap; 6182f3187195STejun Heo 6183f3187195STejun Heo ap = ata_port_alloc(host); 6184f3187195STejun Heo if (!ap) 6185f3187195STejun Heo goto err_out; 6186f3187195STejun Heo 6187f3187195STejun Heo ap->port_no = i; 6188f3187195STejun Heo host->ports[i] = ap; 6189f3187195STejun Heo } 6190f3187195STejun Heo 6191f3187195STejun Heo devres_remove_group(dev, NULL); 6192f3187195STejun Heo return host; 6193f3187195STejun Heo 6194f3187195STejun Heo err_out: 6195f3187195STejun Heo devres_release_group(dev, NULL); 6196f3187195STejun Heo return NULL; 6197f3187195STejun Heo } 6198f3187195STejun Heo 6199f3187195STejun Heo /** 6200f5cda257STejun Heo * ata_host_alloc_pinfo - alloc host and init with port_info array 6201f5cda257STejun Heo * @dev: generic device this host is associated with 6202f5cda257STejun Heo * @ppi: array of ATA port_info to initialize host with 6203f5cda257STejun Heo * @n_ports: number of ATA ports attached to this host 6204f5cda257STejun Heo * 6205f5cda257STejun Heo * Allocate ATA host and initialize with info from @ppi. If NULL 6206f5cda257STejun Heo * terminated, @ppi may contain fewer entries than @n_ports. The 6207f5cda257STejun Heo * last entry will be used for the remaining ports. 6208f5cda257STejun Heo * 6209f5cda257STejun Heo * RETURNS: 6210f5cda257STejun Heo * Allocate ATA host on success, NULL on failure. 6211f5cda257STejun Heo * 6212f5cda257STejun Heo * LOCKING: 6213f5cda257STejun Heo * Inherited from calling layer (may sleep). 6214f5cda257STejun Heo */ 6215f5cda257STejun Heo struct ata_host *ata_host_alloc_pinfo(struct device *dev, 6216f5cda257STejun Heo const struct ata_port_info * const * ppi, 6217f5cda257STejun Heo int n_ports) 6218f5cda257STejun Heo { 6219f5cda257STejun Heo const struct ata_port_info *pi; 6220f5cda257STejun Heo struct ata_host *host; 6221f5cda257STejun Heo int i, j; 6222f5cda257STejun Heo 6223f5cda257STejun Heo host = ata_host_alloc(dev, n_ports); 6224f5cda257STejun Heo if (!host) 6225f5cda257STejun Heo return NULL; 6226f5cda257STejun Heo 6227f5cda257STejun Heo for (i = 0, j = 0, pi = NULL; i < host->n_ports; i++) { 6228f5cda257STejun Heo struct ata_port *ap = host->ports[i]; 6229f5cda257STejun Heo 6230f5cda257STejun Heo if (ppi[j]) 6231f5cda257STejun Heo pi = ppi[j++]; 6232f5cda257STejun Heo 6233f5cda257STejun Heo ap->pio_mask = pi->pio_mask; 6234f5cda257STejun Heo ap->mwdma_mask = pi->mwdma_mask; 6235f5cda257STejun Heo ap->udma_mask = pi->udma_mask; 6236f5cda257STejun Heo ap->flags |= pi->flags; 6237f5cda257STejun Heo ap->ops = pi->port_ops; 6238f5cda257STejun Heo 6239f5cda257STejun Heo if (!host->ops && (pi->port_ops != &ata_dummy_port_ops)) 6240f5cda257STejun Heo host->ops = pi->port_ops; 6241f5cda257STejun Heo if (!host->private_data && pi->private_data) 6242f5cda257STejun Heo host->private_data = pi->private_data; 6243f5cda257STejun Heo } 6244f5cda257STejun Heo 6245f5cda257STejun Heo return host; 6246f5cda257STejun Heo } 6247f5cda257STejun Heo 6248f5cda257STejun Heo /** 6249ecef7253STejun Heo * ata_host_start - start and freeze ports of an ATA host 6250ecef7253STejun Heo * @host: ATA host to start ports for 6251ecef7253STejun Heo * 6252ecef7253STejun Heo * Start and then freeze ports of @host. Started status is 6253ecef7253STejun Heo * recorded in host->flags, so this function can be called 6254ecef7253STejun Heo * multiple times. Ports are guaranteed to get started only 6255f3187195STejun Heo * once. If host->ops isn't initialized yet, its set to the 6256f3187195STejun Heo * first non-dummy port ops. 6257ecef7253STejun Heo * 6258ecef7253STejun Heo * LOCKING: 6259ecef7253STejun Heo * Inherited from calling layer (may sleep). 6260ecef7253STejun Heo * 6261ecef7253STejun Heo * RETURNS: 6262ecef7253STejun Heo * 0 if all ports are started successfully, -errno otherwise. 6263ecef7253STejun Heo */ 6264ecef7253STejun Heo int ata_host_start(struct ata_host *host) 6265ecef7253STejun Heo { 6266ecef7253STejun Heo int i, rc; 6267ecef7253STejun Heo 6268ecef7253STejun Heo if (host->flags & ATA_HOST_STARTED) 6269ecef7253STejun Heo return 0; 6270ecef7253STejun Heo 6271ecef7253STejun Heo for (i = 0; i < host->n_ports; i++) { 6272ecef7253STejun Heo struct ata_port *ap = host->ports[i]; 6273ecef7253STejun Heo 6274f3187195STejun Heo if (!host->ops && !ata_port_is_dummy(ap)) 6275f3187195STejun Heo host->ops = ap->ops; 6276f3187195STejun Heo 6277ecef7253STejun Heo if (ap->ops->port_start) { 6278ecef7253STejun Heo rc = ap->ops->port_start(ap); 6279ecef7253STejun Heo if (rc) { 6280ecef7253STejun Heo ata_port_printk(ap, KERN_ERR, "failed to " 6281ecef7253STejun Heo "start port (errno=%d)\n", rc); 6282ecef7253STejun Heo goto err_out; 6283ecef7253STejun Heo } 6284ecef7253STejun Heo } 6285ecef7253STejun Heo 6286ecef7253STejun Heo ata_eh_freeze_port(ap); 6287ecef7253STejun Heo } 6288ecef7253STejun Heo 6289ecef7253STejun Heo host->flags |= ATA_HOST_STARTED; 6290ecef7253STejun Heo return 0; 6291ecef7253STejun Heo 6292ecef7253STejun Heo err_out: 6293ecef7253STejun Heo while (--i >= 0) { 6294ecef7253STejun Heo struct ata_port *ap = host->ports[i]; 6295ecef7253STejun Heo 6296ecef7253STejun Heo if (ap->ops->port_stop) 6297ecef7253STejun Heo ap->ops->port_stop(ap); 6298ecef7253STejun Heo } 6299ecef7253STejun Heo return rc; 6300ecef7253STejun Heo } 6301ecef7253STejun Heo 6302ecef7253STejun Heo /** 6303cca3974eSJeff Garzik * ata_sas_host_init - Initialize a host struct 6304cca3974eSJeff Garzik * @host: host to initialize 6305cca3974eSJeff Garzik * @dev: device host is attached to 6306cca3974eSJeff Garzik * @flags: host flags 6307c6fd2807SJeff Garzik * @ops: port_ops 6308c6fd2807SJeff Garzik * 6309c6fd2807SJeff Garzik * LOCKING: 6310c6fd2807SJeff Garzik * PCI/etc. bus probe sem. 6311c6fd2807SJeff Garzik * 6312c6fd2807SJeff Garzik */ 6313f3187195STejun Heo /* KILLME - the only user left is ipr */ 6314cca3974eSJeff Garzik void ata_host_init(struct ata_host *host, struct device *dev, 6315cca3974eSJeff Garzik unsigned long flags, const struct ata_port_operations *ops) 6316c6fd2807SJeff Garzik { 6317cca3974eSJeff Garzik spin_lock_init(&host->lock); 6318cca3974eSJeff Garzik host->dev = dev; 6319cca3974eSJeff Garzik host->flags = flags; 6320cca3974eSJeff Garzik host->ops = ops; 6321c6fd2807SJeff Garzik } 6322c6fd2807SJeff Garzik 6323c6fd2807SJeff Garzik /** 6324f3187195STejun Heo * ata_host_register - register initialized ATA host 6325f3187195STejun Heo * @host: ATA host to register 6326f3187195STejun Heo * @sht: template for SCSI host 6327c6fd2807SJeff Garzik * 6328f3187195STejun Heo * Register initialized ATA host. @host is allocated using 6329f3187195STejun Heo * ata_host_alloc() and fully initialized by LLD. This function 6330f3187195STejun Heo * starts ports, registers @host with ATA and SCSI layers and 6331f3187195STejun Heo * probe registered devices. 6332c6fd2807SJeff Garzik * 6333c6fd2807SJeff Garzik * LOCKING: 6334f3187195STejun Heo * Inherited from calling layer (may sleep). 6335c6fd2807SJeff Garzik * 6336c6fd2807SJeff Garzik * RETURNS: 6337f3187195STejun Heo * 0 on success, -errno otherwise. 6338c6fd2807SJeff Garzik */ 6339f3187195STejun Heo int ata_host_register(struct ata_host *host, struct scsi_host_template *sht) 6340c6fd2807SJeff Garzik { 6341f3187195STejun Heo int i, rc; 6342c6fd2807SJeff Garzik 6343f3187195STejun Heo /* host must have been started */ 6344f3187195STejun Heo if (!(host->flags & ATA_HOST_STARTED)) { 6345f3187195STejun Heo dev_printk(KERN_ERR, host->dev, 6346f3187195STejun Heo "BUG: trying to register unstarted host\n"); 6347f3187195STejun Heo WARN_ON(1); 6348f3187195STejun Heo return -EINVAL; 634902f076aaSAlan Cox } 6350f0d36efdSTejun Heo 6351f3187195STejun Heo /* Blow away unused ports. This happens when LLD can't 6352f3187195STejun Heo * determine the exact number of ports to allocate at 6353f3187195STejun Heo * allocation time. 6354f3187195STejun Heo */ 6355f3187195STejun Heo for (i = host->n_ports; host->ports[i]; i++) 6356f3187195STejun Heo kfree(host->ports[i]); 6357f0d36efdSTejun Heo 6358f3187195STejun Heo /* give ports names and add SCSI hosts */ 6359f3187195STejun Heo for (i = 0; i < host->n_ports; i++) 6360f3187195STejun Heo host->ports[i]->print_id = ata_print_id++; 6361c6fd2807SJeff Garzik 6362f3187195STejun Heo rc = ata_scsi_add_hosts(host, sht); 6363ecef7253STejun Heo if (rc) 6364f3187195STejun Heo return rc; 6365ecef7253STejun Heo 6366fafbae87STejun Heo /* associate with ACPI nodes */ 6367fafbae87STejun Heo ata_acpi_associate(host); 6368fafbae87STejun Heo 6369f3187195STejun Heo /* set cable, sata_spd_limit and report */ 6370cca3974eSJeff Garzik for (i = 0; i < host->n_ports; i++) { 6371cca3974eSJeff Garzik struct ata_port *ap = host->ports[i]; 6372f3187195STejun Heo int irq_line; 6373c6fd2807SJeff Garzik u32 scontrol; 6374f3187195STejun Heo unsigned long xfer_mask; 6375f3187195STejun Heo 6376f3187195STejun Heo /* set SATA cable type if still unset */ 6377f3187195STejun Heo if (ap->cbl == ATA_CBL_NONE && (ap->flags & ATA_FLAG_SATA)) 6378f3187195STejun Heo ap->cbl = ATA_CBL_SATA; 6379c6fd2807SJeff Garzik 6380c6fd2807SJeff Garzik /* init sata_spd_limit to the current value */ 6381c6fd2807SJeff Garzik if (sata_scr_read(ap, SCR_CONTROL, &scontrol) == 0) { 6382c6fd2807SJeff Garzik int spd = (scontrol >> 4) & 0xf; 6383afe3cc51STejun Heo if (spd) 6384c6fd2807SJeff Garzik ap->hw_sata_spd_limit &= (1 << spd) - 1; 6385c6fd2807SJeff Garzik } 6386c6fd2807SJeff Garzik ap->sata_spd_limit = ap->hw_sata_spd_limit; 6387c6fd2807SJeff Garzik 6388f3187195STejun Heo /* report the secondary IRQ for second channel legacy */ 6389f3187195STejun Heo irq_line = host->irq; 6390f3187195STejun Heo if (i == 1 && host->irq2) 6391f3187195STejun Heo irq_line = host->irq2; 6392f3187195STejun Heo 6393f3187195STejun Heo xfer_mask = ata_pack_xfermask(ap->pio_mask, ap->mwdma_mask, 6394f3187195STejun Heo ap->udma_mask); 6395f3187195STejun Heo 6396f3187195STejun Heo /* print per-port info to dmesg */ 6397f3187195STejun Heo if (!ata_port_is_dummy(ap)) 6398f3187195STejun Heo ata_port_printk(ap, KERN_INFO, "%cATA max %s cmd 0x%p " 6399f3187195STejun Heo "ctl 0x%p bmdma 0x%p irq %d\n", 6400a16abc0bSTejun Heo (ap->flags & ATA_FLAG_SATA) ? 'S' : 'P', 6401f3187195STejun Heo ata_mode_string(xfer_mask), 6402f3187195STejun Heo ap->ioaddr.cmd_addr, 6403f3187195STejun Heo ap->ioaddr.ctl_addr, 6404f3187195STejun Heo ap->ioaddr.bmdma_addr, 6405f3187195STejun Heo irq_line); 6406f3187195STejun Heo else 6407f3187195STejun Heo ata_port_printk(ap, KERN_INFO, "DUMMY\n"); 6408c6fd2807SJeff Garzik } 6409c6fd2807SJeff Garzik 6410f3187195STejun Heo /* perform each probe synchronously */ 6411f3187195STejun Heo DPRINTK("probe begin\n"); 6412f3187195STejun Heo for (i = 0; i < host->n_ports; i++) { 6413f3187195STejun Heo struct ata_port *ap = host->ports[i]; 6414f3187195STejun Heo int rc; 6415f3187195STejun Heo 6416f3187195STejun Heo /* probe */ 6417c6fd2807SJeff Garzik if (ap->ops->error_handler) { 6418c6fd2807SJeff Garzik struct ata_eh_info *ehi = &ap->eh_info; 6419c6fd2807SJeff Garzik unsigned long flags; 6420c6fd2807SJeff Garzik 6421c6fd2807SJeff Garzik ata_port_probe(ap); 6422c6fd2807SJeff Garzik 6423c6fd2807SJeff Garzik /* kick EH for boot probing */ 6424c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 6425c6fd2807SJeff Garzik 6426c6fd2807SJeff Garzik ehi->probe_mask = (1 << ATA_MAX_DEVICES) - 1; 6427c6fd2807SJeff Garzik ehi->action |= ATA_EH_SOFTRESET; 6428c6fd2807SJeff Garzik ehi->flags |= ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET; 6429c6fd2807SJeff Garzik 6430f4d6d004STejun Heo ap->pflags &= ~ATA_PFLAG_INITIALIZING; 6431c6fd2807SJeff Garzik ap->pflags |= ATA_PFLAG_LOADING; 6432c6fd2807SJeff Garzik ata_port_schedule_eh(ap); 6433c6fd2807SJeff Garzik 6434c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 6435c6fd2807SJeff Garzik 6436c6fd2807SJeff Garzik /* wait for EH to finish */ 6437c6fd2807SJeff Garzik ata_port_wait_eh(ap); 6438c6fd2807SJeff Garzik } else { 643944877b4eSTejun Heo DPRINTK("ata%u: bus probe begin\n", ap->print_id); 6440c6fd2807SJeff Garzik rc = ata_bus_probe(ap); 644144877b4eSTejun Heo DPRINTK("ata%u: bus probe end\n", ap->print_id); 6442c6fd2807SJeff Garzik 6443c6fd2807SJeff Garzik if (rc) { 6444c6fd2807SJeff Garzik /* FIXME: do something useful here? 6445c6fd2807SJeff Garzik * Current libata behavior will 6446c6fd2807SJeff Garzik * tear down everything when 6447c6fd2807SJeff Garzik * the module is removed 6448c6fd2807SJeff Garzik * or the h/w is unplugged. 6449c6fd2807SJeff Garzik */ 6450c6fd2807SJeff Garzik } 6451c6fd2807SJeff Garzik } 6452c6fd2807SJeff Garzik } 6453c6fd2807SJeff Garzik 6454c6fd2807SJeff Garzik /* probes are done, now scan each port's disk(s) */ 6455c6fd2807SJeff Garzik DPRINTK("host probe begin\n"); 6456cca3974eSJeff Garzik for (i = 0; i < host->n_ports; i++) { 6457cca3974eSJeff Garzik struct ata_port *ap = host->ports[i]; 6458c6fd2807SJeff Garzik 64591ae46317STejun Heo ata_scsi_scan_host(ap, 1); 6460c6fd2807SJeff Garzik } 6461c6fd2807SJeff Garzik 6462f3187195STejun Heo return 0; 6463f3187195STejun Heo } 6464f3187195STejun Heo 6465f3187195STejun Heo /** 6466f5cda257STejun Heo * ata_host_activate - start host, request IRQ and register it 6467f5cda257STejun Heo * @host: target ATA host 6468f5cda257STejun Heo * @irq: IRQ to request 6469f5cda257STejun Heo * @irq_handler: irq_handler used when requesting IRQ 6470f5cda257STejun Heo * @irq_flags: irq_flags used when requesting IRQ 6471f5cda257STejun Heo * @sht: scsi_host_template to use when registering the host 6472f5cda257STejun Heo * 6473f5cda257STejun Heo * After allocating an ATA host and initializing it, most libata 6474f5cda257STejun Heo * LLDs perform three steps to activate the host - start host, 6475f5cda257STejun Heo * request IRQ and register it. This helper takes necessasry 6476f5cda257STejun Heo * arguments and performs the three steps in one go. 6477f5cda257STejun Heo * 6478f5cda257STejun Heo * LOCKING: 6479f5cda257STejun Heo * Inherited from calling layer (may sleep). 6480f5cda257STejun Heo * 6481f5cda257STejun Heo * RETURNS: 6482f5cda257STejun Heo * 0 on success, -errno otherwise. 6483f5cda257STejun Heo */ 6484f5cda257STejun Heo int ata_host_activate(struct ata_host *host, int irq, 6485f5cda257STejun Heo irq_handler_t irq_handler, unsigned long irq_flags, 6486f5cda257STejun Heo struct scsi_host_template *sht) 6487f5cda257STejun Heo { 6488f5cda257STejun Heo int rc; 6489f5cda257STejun Heo 6490f5cda257STejun Heo rc = ata_host_start(host); 6491f5cda257STejun Heo if (rc) 6492f5cda257STejun Heo return rc; 6493f5cda257STejun Heo 6494f5cda257STejun Heo rc = devm_request_irq(host->dev, irq, irq_handler, irq_flags, 6495f5cda257STejun Heo dev_driver_string(host->dev), host); 6496f5cda257STejun Heo if (rc) 6497f5cda257STejun Heo return rc; 6498f5cda257STejun Heo 64994031826bSTejun Heo /* Used to print device info at probe */ 65004031826bSTejun Heo host->irq = irq; 65014031826bSTejun Heo 6502f5cda257STejun Heo rc = ata_host_register(host, sht); 6503f5cda257STejun Heo /* if failed, just free the IRQ and leave ports alone */ 6504f5cda257STejun Heo if (rc) 6505f5cda257STejun Heo devm_free_irq(host->dev, irq, host); 6506f5cda257STejun Heo 6507f5cda257STejun Heo return rc; 6508f5cda257STejun Heo } 6509f5cda257STejun Heo 6510f5cda257STejun Heo /** 6511c6fd2807SJeff Garzik * ata_port_detach - Detach ATA port in prepration of device removal 6512c6fd2807SJeff Garzik * @ap: ATA port to be detached 6513c6fd2807SJeff Garzik * 6514c6fd2807SJeff Garzik * Detach all ATA devices and the associated SCSI devices of @ap; 6515c6fd2807SJeff Garzik * then, remove the associated SCSI host. @ap is guaranteed to 6516c6fd2807SJeff Garzik * be quiescent on return from this function. 6517c6fd2807SJeff Garzik * 6518c6fd2807SJeff Garzik * LOCKING: 6519c6fd2807SJeff Garzik * Kernel thread context (may sleep). 6520c6fd2807SJeff Garzik */ 6521c6fd2807SJeff Garzik void ata_port_detach(struct ata_port *ap) 6522c6fd2807SJeff Garzik { 6523c6fd2807SJeff Garzik unsigned long flags; 6524c6fd2807SJeff Garzik int i; 6525c6fd2807SJeff Garzik 6526c6fd2807SJeff Garzik if (!ap->ops->error_handler) 6527c6fd2807SJeff Garzik goto skip_eh; 6528c6fd2807SJeff Garzik 6529c6fd2807SJeff Garzik /* tell EH we're leaving & flush EH */ 6530c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 6531c6fd2807SJeff Garzik ap->pflags |= ATA_PFLAG_UNLOADING; 6532c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 6533c6fd2807SJeff Garzik 6534c6fd2807SJeff Garzik ata_port_wait_eh(ap); 6535c6fd2807SJeff Garzik 6536c6fd2807SJeff Garzik /* EH is now guaranteed to see UNLOADING, so no new device 6537c6fd2807SJeff Garzik * will be attached. Disable all existing devices. 6538c6fd2807SJeff Garzik */ 6539c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 6540c6fd2807SJeff Garzik 6541c6fd2807SJeff Garzik for (i = 0; i < ATA_MAX_DEVICES; i++) 6542c6fd2807SJeff Garzik ata_dev_disable(&ap->device[i]); 6543c6fd2807SJeff Garzik 6544c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 6545c6fd2807SJeff Garzik 6546c6fd2807SJeff Garzik /* Final freeze & EH. All in-flight commands are aborted. EH 6547c6fd2807SJeff Garzik * will be skipped and retrials will be terminated with bad 6548c6fd2807SJeff Garzik * target. 6549c6fd2807SJeff Garzik */ 6550c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 6551c6fd2807SJeff Garzik ata_port_freeze(ap); /* won't be thawed */ 6552c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 6553c6fd2807SJeff Garzik 6554c6fd2807SJeff Garzik ata_port_wait_eh(ap); 655545a66c1cSOleg Nesterov cancel_rearming_delayed_work(&ap->hotplug_task); 6556c6fd2807SJeff Garzik 6557c6fd2807SJeff Garzik skip_eh: 6558c6fd2807SJeff Garzik /* remove the associated SCSI host */ 6559cca3974eSJeff Garzik scsi_remove_host(ap->scsi_host); 6560c6fd2807SJeff Garzik } 6561c6fd2807SJeff Garzik 6562c6fd2807SJeff Garzik /** 65630529c159STejun Heo * ata_host_detach - Detach all ports of an ATA host 65640529c159STejun Heo * @host: Host to detach 65650529c159STejun Heo * 65660529c159STejun Heo * Detach all ports of @host. 65670529c159STejun Heo * 65680529c159STejun Heo * LOCKING: 65690529c159STejun Heo * Kernel thread context (may sleep). 65700529c159STejun Heo */ 65710529c159STejun Heo void ata_host_detach(struct ata_host *host) 65720529c159STejun Heo { 65730529c159STejun Heo int i; 65740529c159STejun Heo 65750529c159STejun Heo for (i = 0; i < host->n_ports; i++) 65760529c159STejun Heo ata_port_detach(host->ports[i]); 65770529c159STejun Heo } 65780529c159STejun Heo 6579c6fd2807SJeff Garzik /** 6580c6fd2807SJeff Garzik * ata_std_ports - initialize ioaddr with standard port offsets. 6581c6fd2807SJeff Garzik * @ioaddr: IO address structure to be initialized 6582c6fd2807SJeff Garzik * 6583c6fd2807SJeff Garzik * Utility function which initializes data_addr, error_addr, 6584c6fd2807SJeff Garzik * feature_addr, nsect_addr, lbal_addr, lbam_addr, lbah_addr, 6585c6fd2807SJeff Garzik * device_addr, status_addr, and command_addr to standard offsets 6586c6fd2807SJeff Garzik * relative to cmd_addr. 6587c6fd2807SJeff Garzik * 6588c6fd2807SJeff Garzik * Does not set ctl_addr, altstatus_addr, bmdma_addr, or scr_addr. 6589c6fd2807SJeff Garzik */ 6590c6fd2807SJeff Garzik 6591c6fd2807SJeff Garzik void ata_std_ports(struct ata_ioports *ioaddr) 6592c6fd2807SJeff Garzik { 6593c6fd2807SJeff Garzik ioaddr->data_addr = ioaddr->cmd_addr + ATA_REG_DATA; 6594c6fd2807SJeff Garzik ioaddr->error_addr = ioaddr->cmd_addr + ATA_REG_ERR; 6595c6fd2807SJeff Garzik ioaddr->feature_addr = ioaddr->cmd_addr + ATA_REG_FEATURE; 6596c6fd2807SJeff Garzik ioaddr->nsect_addr = ioaddr->cmd_addr + ATA_REG_NSECT; 6597c6fd2807SJeff Garzik ioaddr->lbal_addr = ioaddr->cmd_addr + ATA_REG_LBAL; 6598c6fd2807SJeff Garzik ioaddr->lbam_addr = ioaddr->cmd_addr + ATA_REG_LBAM; 6599c6fd2807SJeff Garzik ioaddr->lbah_addr = ioaddr->cmd_addr + ATA_REG_LBAH; 6600c6fd2807SJeff Garzik ioaddr->device_addr = ioaddr->cmd_addr + ATA_REG_DEVICE; 6601c6fd2807SJeff Garzik ioaddr->status_addr = ioaddr->cmd_addr + ATA_REG_STATUS; 6602c6fd2807SJeff Garzik ioaddr->command_addr = ioaddr->cmd_addr + ATA_REG_CMD; 6603c6fd2807SJeff Garzik } 6604c6fd2807SJeff Garzik 6605c6fd2807SJeff Garzik 6606c6fd2807SJeff Garzik #ifdef CONFIG_PCI 6607c6fd2807SJeff Garzik 6608c6fd2807SJeff Garzik /** 6609c6fd2807SJeff Garzik * ata_pci_remove_one - PCI layer callback for device removal 6610c6fd2807SJeff Garzik * @pdev: PCI device that was removed 6611c6fd2807SJeff Garzik * 6612b878ca5dSTejun Heo * PCI layer indicates to libata via this hook that hot-unplug or 6613b878ca5dSTejun Heo * module unload event has occurred. Detach all ports. Resource 6614b878ca5dSTejun Heo * release is handled via devres. 6615c6fd2807SJeff Garzik * 6616c6fd2807SJeff Garzik * LOCKING: 6617c6fd2807SJeff Garzik * Inherited from PCI layer (may sleep). 6618c6fd2807SJeff Garzik */ 6619c6fd2807SJeff Garzik void ata_pci_remove_one(struct pci_dev *pdev) 6620c6fd2807SJeff Garzik { 6621c6fd2807SJeff Garzik struct device *dev = pci_dev_to_dev(pdev); 6622cca3974eSJeff Garzik struct ata_host *host = dev_get_drvdata(dev); 6623c6fd2807SJeff Garzik 6624f0d36efdSTejun Heo ata_host_detach(host); 6625c6fd2807SJeff Garzik } 6626c6fd2807SJeff Garzik 6627c6fd2807SJeff Garzik /* move to PCI subsystem */ 6628c6fd2807SJeff Garzik int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits) 6629c6fd2807SJeff Garzik { 6630c6fd2807SJeff Garzik unsigned long tmp = 0; 6631c6fd2807SJeff Garzik 6632c6fd2807SJeff Garzik switch (bits->width) { 6633c6fd2807SJeff Garzik case 1: { 6634c6fd2807SJeff Garzik u8 tmp8 = 0; 6635c6fd2807SJeff Garzik pci_read_config_byte(pdev, bits->reg, &tmp8); 6636c6fd2807SJeff Garzik tmp = tmp8; 6637c6fd2807SJeff Garzik break; 6638c6fd2807SJeff Garzik } 6639c6fd2807SJeff Garzik case 2: { 6640c6fd2807SJeff Garzik u16 tmp16 = 0; 6641c6fd2807SJeff Garzik pci_read_config_word(pdev, bits->reg, &tmp16); 6642c6fd2807SJeff Garzik tmp = tmp16; 6643c6fd2807SJeff Garzik break; 6644c6fd2807SJeff Garzik } 6645c6fd2807SJeff Garzik case 4: { 6646c6fd2807SJeff Garzik u32 tmp32 = 0; 6647c6fd2807SJeff Garzik pci_read_config_dword(pdev, bits->reg, &tmp32); 6648c6fd2807SJeff Garzik tmp = tmp32; 6649c6fd2807SJeff Garzik break; 6650c6fd2807SJeff Garzik } 6651c6fd2807SJeff Garzik 6652c6fd2807SJeff Garzik default: 6653c6fd2807SJeff Garzik return -EINVAL; 6654c6fd2807SJeff Garzik } 6655c6fd2807SJeff Garzik 6656c6fd2807SJeff Garzik tmp &= bits->mask; 6657c6fd2807SJeff Garzik 6658c6fd2807SJeff Garzik return (tmp == bits->val) ? 1 : 0; 6659c6fd2807SJeff Garzik } 6660c6fd2807SJeff Garzik 66616ffa01d8STejun Heo #ifdef CONFIG_PM 6662c6fd2807SJeff Garzik void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg) 6663c6fd2807SJeff Garzik { 6664c6fd2807SJeff Garzik pci_save_state(pdev); 6665c6fd2807SJeff Garzik pci_disable_device(pdev); 66664c90d971STejun Heo 66674c90d971STejun Heo if (mesg.event == PM_EVENT_SUSPEND) 6668c6fd2807SJeff Garzik pci_set_power_state(pdev, PCI_D3hot); 6669c6fd2807SJeff Garzik } 6670c6fd2807SJeff Garzik 6671553c4aa6STejun Heo int ata_pci_device_do_resume(struct pci_dev *pdev) 6672c6fd2807SJeff Garzik { 6673553c4aa6STejun Heo int rc; 6674553c4aa6STejun Heo 6675c6fd2807SJeff Garzik pci_set_power_state(pdev, PCI_D0); 6676c6fd2807SJeff Garzik pci_restore_state(pdev); 6677553c4aa6STejun Heo 6678f0d36efdSTejun Heo rc = pcim_enable_device(pdev); 6679553c4aa6STejun Heo if (rc) { 6680553c4aa6STejun Heo dev_printk(KERN_ERR, &pdev->dev, 6681553c4aa6STejun Heo "failed to enable device after resume (%d)\n", rc); 6682553c4aa6STejun Heo return rc; 6683553c4aa6STejun Heo } 6684553c4aa6STejun Heo 6685c6fd2807SJeff Garzik pci_set_master(pdev); 6686553c4aa6STejun Heo return 0; 6687c6fd2807SJeff Garzik } 6688c6fd2807SJeff Garzik 6689c6fd2807SJeff Garzik int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg) 6690c6fd2807SJeff Garzik { 6691cca3974eSJeff Garzik struct ata_host *host = dev_get_drvdata(&pdev->dev); 6692c6fd2807SJeff Garzik int rc = 0; 6693c6fd2807SJeff Garzik 6694cca3974eSJeff Garzik rc = ata_host_suspend(host, mesg); 6695c6fd2807SJeff Garzik if (rc) 6696c6fd2807SJeff Garzik return rc; 6697c6fd2807SJeff Garzik 6698c6fd2807SJeff Garzik ata_pci_device_do_suspend(pdev, mesg); 6699c6fd2807SJeff Garzik 6700c6fd2807SJeff Garzik return 0; 6701c6fd2807SJeff Garzik } 6702c6fd2807SJeff Garzik 6703c6fd2807SJeff Garzik int ata_pci_device_resume(struct pci_dev *pdev) 6704c6fd2807SJeff Garzik { 6705cca3974eSJeff Garzik struct ata_host *host = dev_get_drvdata(&pdev->dev); 6706553c4aa6STejun Heo int rc; 6707c6fd2807SJeff Garzik 6708553c4aa6STejun Heo rc = ata_pci_device_do_resume(pdev); 6709553c4aa6STejun Heo if (rc == 0) 6710cca3974eSJeff Garzik ata_host_resume(host); 6711553c4aa6STejun Heo return rc; 6712c6fd2807SJeff Garzik } 67136ffa01d8STejun Heo #endif /* CONFIG_PM */ 67146ffa01d8STejun Heo 6715c6fd2807SJeff Garzik #endif /* CONFIG_PCI */ 6716c6fd2807SJeff Garzik 6717c6fd2807SJeff Garzik 6718c6fd2807SJeff Garzik static int __init ata_init(void) 6719c6fd2807SJeff Garzik { 6720c6fd2807SJeff Garzik ata_probe_timeout *= HZ; 6721c6fd2807SJeff Garzik ata_wq = create_workqueue("ata"); 6722c6fd2807SJeff Garzik if (!ata_wq) 6723c6fd2807SJeff Garzik return -ENOMEM; 6724c6fd2807SJeff Garzik 6725c6fd2807SJeff Garzik ata_aux_wq = create_singlethread_workqueue("ata_aux"); 6726c6fd2807SJeff Garzik if (!ata_aux_wq) { 6727c6fd2807SJeff Garzik destroy_workqueue(ata_wq); 6728c6fd2807SJeff Garzik return -ENOMEM; 6729c6fd2807SJeff Garzik } 6730c6fd2807SJeff Garzik 6731c6fd2807SJeff Garzik printk(KERN_DEBUG "libata version " DRV_VERSION " loaded.\n"); 6732c6fd2807SJeff Garzik return 0; 6733c6fd2807SJeff Garzik } 6734c6fd2807SJeff Garzik 6735c6fd2807SJeff Garzik static void __exit ata_exit(void) 6736c6fd2807SJeff Garzik { 6737c6fd2807SJeff Garzik destroy_workqueue(ata_wq); 6738c6fd2807SJeff Garzik destroy_workqueue(ata_aux_wq); 6739c6fd2807SJeff Garzik } 6740c6fd2807SJeff Garzik 6741a4625085SBrian King subsys_initcall(ata_init); 6742c6fd2807SJeff Garzik module_exit(ata_exit); 6743c6fd2807SJeff Garzik 6744c6fd2807SJeff Garzik static unsigned long ratelimit_time; 6745c6fd2807SJeff Garzik static DEFINE_SPINLOCK(ata_ratelimit_lock); 6746c6fd2807SJeff Garzik 6747c6fd2807SJeff Garzik int ata_ratelimit(void) 6748c6fd2807SJeff Garzik { 6749c6fd2807SJeff Garzik int rc; 6750c6fd2807SJeff Garzik unsigned long flags; 6751c6fd2807SJeff Garzik 6752c6fd2807SJeff Garzik spin_lock_irqsave(&ata_ratelimit_lock, flags); 6753c6fd2807SJeff Garzik 6754c6fd2807SJeff Garzik if (time_after(jiffies, ratelimit_time)) { 6755c6fd2807SJeff Garzik rc = 1; 6756c6fd2807SJeff Garzik ratelimit_time = jiffies + (HZ/5); 6757c6fd2807SJeff Garzik } else 6758c6fd2807SJeff Garzik rc = 0; 6759c6fd2807SJeff Garzik 6760c6fd2807SJeff Garzik spin_unlock_irqrestore(&ata_ratelimit_lock, flags); 6761c6fd2807SJeff Garzik 6762c6fd2807SJeff Garzik return rc; 6763c6fd2807SJeff Garzik } 6764c6fd2807SJeff Garzik 6765c6fd2807SJeff Garzik /** 6766c6fd2807SJeff Garzik * ata_wait_register - wait until register value changes 6767c6fd2807SJeff Garzik * @reg: IO-mapped register 6768c6fd2807SJeff Garzik * @mask: Mask to apply to read register value 6769c6fd2807SJeff Garzik * @val: Wait condition 6770c6fd2807SJeff Garzik * @interval_msec: polling interval in milliseconds 6771c6fd2807SJeff Garzik * @timeout_msec: timeout in milliseconds 6772c6fd2807SJeff Garzik * 6773c6fd2807SJeff Garzik * Waiting for some bits of register to change is a common 6774c6fd2807SJeff Garzik * operation for ATA controllers. This function reads 32bit LE 6775c6fd2807SJeff Garzik * IO-mapped register @reg and tests for the following condition. 6776c6fd2807SJeff Garzik * 6777c6fd2807SJeff Garzik * (*@reg & mask) != val 6778c6fd2807SJeff Garzik * 6779c6fd2807SJeff Garzik * If the condition is met, it returns; otherwise, the process is 6780c6fd2807SJeff Garzik * repeated after @interval_msec until timeout. 6781c6fd2807SJeff Garzik * 6782c6fd2807SJeff Garzik * LOCKING: 6783c6fd2807SJeff Garzik * Kernel thread context (may sleep) 6784c6fd2807SJeff Garzik * 6785c6fd2807SJeff Garzik * RETURNS: 6786c6fd2807SJeff Garzik * The final register value. 6787c6fd2807SJeff Garzik */ 6788c6fd2807SJeff Garzik u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val, 6789c6fd2807SJeff Garzik unsigned long interval_msec, 6790c6fd2807SJeff Garzik unsigned long timeout_msec) 6791c6fd2807SJeff Garzik { 6792c6fd2807SJeff Garzik unsigned long timeout; 6793c6fd2807SJeff Garzik u32 tmp; 6794c6fd2807SJeff Garzik 6795c6fd2807SJeff Garzik tmp = ioread32(reg); 6796c6fd2807SJeff Garzik 6797c6fd2807SJeff Garzik /* Calculate timeout _after_ the first read to make sure 6798c6fd2807SJeff Garzik * preceding writes reach the controller before starting to 6799c6fd2807SJeff Garzik * eat away the timeout. 6800c6fd2807SJeff Garzik */ 6801c6fd2807SJeff Garzik timeout = jiffies + (timeout_msec * HZ) / 1000; 6802c6fd2807SJeff Garzik 6803c6fd2807SJeff Garzik while ((tmp & mask) == val && time_before(jiffies, timeout)) { 6804c6fd2807SJeff Garzik msleep(interval_msec); 6805c6fd2807SJeff Garzik tmp = ioread32(reg); 6806c6fd2807SJeff Garzik } 6807c6fd2807SJeff Garzik 6808c6fd2807SJeff Garzik return tmp; 6809c6fd2807SJeff Garzik } 6810c6fd2807SJeff Garzik 6811c6fd2807SJeff Garzik /* 6812c6fd2807SJeff Garzik * Dummy port_ops 6813c6fd2807SJeff Garzik */ 6814c6fd2807SJeff Garzik static void ata_dummy_noret(struct ata_port *ap) { } 6815c6fd2807SJeff Garzik static int ata_dummy_ret0(struct ata_port *ap) { return 0; } 6816c6fd2807SJeff Garzik static void ata_dummy_qc_noret(struct ata_queued_cmd *qc) { } 6817c6fd2807SJeff Garzik 6818c6fd2807SJeff Garzik static u8 ata_dummy_check_status(struct ata_port *ap) 6819c6fd2807SJeff Garzik { 6820c6fd2807SJeff Garzik return ATA_DRDY; 6821c6fd2807SJeff Garzik } 6822c6fd2807SJeff Garzik 6823c6fd2807SJeff Garzik static unsigned int ata_dummy_qc_issue(struct ata_queued_cmd *qc) 6824c6fd2807SJeff Garzik { 6825c6fd2807SJeff Garzik return AC_ERR_SYSTEM; 6826c6fd2807SJeff Garzik } 6827c6fd2807SJeff Garzik 6828c6fd2807SJeff Garzik const struct ata_port_operations ata_dummy_port_ops = { 6829c6fd2807SJeff Garzik .port_disable = ata_port_disable, 6830c6fd2807SJeff Garzik .check_status = ata_dummy_check_status, 6831c6fd2807SJeff Garzik .check_altstatus = ata_dummy_check_status, 6832c6fd2807SJeff Garzik .dev_select = ata_noop_dev_select, 6833c6fd2807SJeff Garzik .qc_prep = ata_noop_qc_prep, 6834c6fd2807SJeff Garzik .qc_issue = ata_dummy_qc_issue, 6835c6fd2807SJeff Garzik .freeze = ata_dummy_noret, 6836c6fd2807SJeff Garzik .thaw = ata_dummy_noret, 6837c6fd2807SJeff Garzik .error_handler = ata_dummy_noret, 6838c6fd2807SJeff Garzik .post_internal_cmd = ata_dummy_qc_noret, 6839c6fd2807SJeff Garzik .irq_clear = ata_dummy_noret, 6840c6fd2807SJeff Garzik .port_start = ata_dummy_ret0, 6841c6fd2807SJeff Garzik .port_stop = ata_dummy_noret, 6842c6fd2807SJeff Garzik }; 6843c6fd2807SJeff Garzik 684421b0ad4fSTejun Heo const struct ata_port_info ata_dummy_port_info = { 684521b0ad4fSTejun Heo .port_ops = &ata_dummy_port_ops, 684621b0ad4fSTejun Heo }; 684721b0ad4fSTejun Heo 6848c6fd2807SJeff Garzik /* 6849c6fd2807SJeff Garzik * libata is essentially a library of internal helper functions for 6850c6fd2807SJeff Garzik * low-level ATA host controller drivers. As such, the API/ABI is 6851c6fd2807SJeff Garzik * likely to change as new drivers are added and updated. 6852c6fd2807SJeff Garzik * Do not depend on ABI/API stability. 6853c6fd2807SJeff Garzik */ 6854c6fd2807SJeff Garzik 6855c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(sata_deb_timing_normal); 6856c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(sata_deb_timing_hotplug); 6857c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(sata_deb_timing_long); 6858c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_dummy_port_ops); 685921b0ad4fSTejun Heo EXPORT_SYMBOL_GPL(ata_dummy_port_info); 6860c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_std_bios_param); 6861c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_std_ports); 6862cca3974eSJeff Garzik EXPORT_SYMBOL_GPL(ata_host_init); 6863f3187195STejun Heo EXPORT_SYMBOL_GPL(ata_host_alloc); 6864f5cda257STejun Heo EXPORT_SYMBOL_GPL(ata_host_alloc_pinfo); 6865ecef7253STejun Heo EXPORT_SYMBOL_GPL(ata_host_start); 6866f3187195STejun Heo EXPORT_SYMBOL_GPL(ata_host_register); 6867f5cda257STejun Heo EXPORT_SYMBOL_GPL(ata_host_activate); 68680529c159STejun Heo EXPORT_SYMBOL_GPL(ata_host_detach); 6869c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_sg_init); 6870c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_sg_init_one); 6871c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_hsm_move); 6872c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_qc_complete); 6873c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_qc_complete_multiple); 6874c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_qc_issue_prot); 6875c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_tf_load); 6876c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_tf_read); 6877c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_noop_dev_select); 6878c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_std_dev_select); 687943727fbcSJeff Garzik EXPORT_SYMBOL_GPL(sata_print_link_status); 6880c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_tf_to_fis); 6881c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_tf_from_fis); 6882c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_check_status); 6883c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_altstatus); 6884c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_exec_command); 6885c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_port_start); 6886d92e74d3SAlan Cox EXPORT_SYMBOL_GPL(ata_sff_port_start); 6887c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_interrupt); 688804351821SAlan EXPORT_SYMBOL_GPL(ata_do_set_mode); 68890d5ff566STejun Heo EXPORT_SYMBOL_GPL(ata_data_xfer); 68900d5ff566STejun Heo EXPORT_SYMBOL_GPL(ata_data_xfer_noirq); 6891c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_qc_prep); 6892d26fc955SAlan Cox EXPORT_SYMBOL_GPL(ata_dumb_qc_prep); 6893c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_noop_qc_prep); 6894c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_bmdma_setup); 6895c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_bmdma_start); 6896c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_bmdma_irq_clear); 6897c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_bmdma_status); 6898c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_bmdma_stop); 6899c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_bmdma_freeze); 6900c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_bmdma_thaw); 6901c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_bmdma_drive_eh); 6902c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_bmdma_error_handler); 6903c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_bmdma_post_internal_cmd); 6904c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_port_probe); 690510305f0fSAlan EXPORT_SYMBOL_GPL(ata_dev_disable); 6906c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(sata_set_spd); 6907c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(sata_phy_debounce); 6908c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(sata_phy_resume); 6909c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(sata_phy_reset); 6910c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(__sata_phy_reset); 6911c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_bus_reset); 6912c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_std_prereset); 6913c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_std_softreset); 6914b6103f6dSTejun Heo EXPORT_SYMBOL_GPL(sata_port_hardreset); 6915c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(sata_std_hardreset); 6916c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_std_postreset); 6917c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_dev_classify); 6918c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_dev_pair); 6919c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_port_disable); 6920c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_ratelimit); 6921c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_wait_register); 6922c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_busy_sleep); 6923d4b2bab4STejun Heo EXPORT_SYMBOL_GPL(ata_wait_ready); 6924c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_port_queue_task); 6925c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_scsi_ioctl); 6926c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_scsi_queuecmd); 6927c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_scsi_slave_config); 6928c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_scsi_slave_destroy); 6929c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_scsi_change_queue_depth); 6930c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_host_intr); 6931c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(sata_scr_valid); 6932c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(sata_scr_read); 6933c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(sata_scr_write); 6934c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(sata_scr_write_flush); 6935c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_port_online); 6936c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_port_offline); 69376ffa01d8STejun Heo #ifdef CONFIG_PM 6938cca3974eSJeff Garzik EXPORT_SYMBOL_GPL(ata_host_suspend); 6939cca3974eSJeff Garzik EXPORT_SYMBOL_GPL(ata_host_resume); 69406ffa01d8STejun Heo #endif /* CONFIG_PM */ 6941c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_id_string); 6942c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_id_c_string); 694310305f0fSAlan EXPORT_SYMBOL_GPL(ata_id_to_dma_mode); 6944c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_scsi_simulate); 6945c6fd2807SJeff Garzik 6946c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_pio_need_iordy); 6947c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_timing_compute); 6948c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_timing_merge); 6949c6fd2807SJeff Garzik 6950c6fd2807SJeff Garzik #ifdef CONFIG_PCI 6951c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(pci_test_config_bits); 6952d583bc18STejun Heo EXPORT_SYMBOL_GPL(ata_pci_init_sff_host); 69531626aeb8STejun Heo EXPORT_SYMBOL_GPL(ata_pci_init_bmdma); 6954d583bc18STejun Heo EXPORT_SYMBOL_GPL(ata_pci_prepare_sff_host); 6955c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_pci_init_one); 6956c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_pci_remove_one); 69576ffa01d8STejun Heo #ifdef CONFIG_PM 6958c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_pci_device_do_suspend); 6959c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_pci_device_do_resume); 6960c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_pci_device_suspend); 6961c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_pci_device_resume); 69626ffa01d8STejun Heo #endif /* CONFIG_PM */ 6963c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_pci_default_filter); 6964c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_pci_clear_simplex); 6965c6fd2807SJeff Garzik #endif /* CONFIG_PCI */ 6966c6fd2807SJeff Garzik 6967b64bbc39STejun Heo EXPORT_SYMBOL_GPL(__ata_ehi_push_desc); 6968b64bbc39STejun Heo EXPORT_SYMBOL_GPL(ata_ehi_push_desc); 6969b64bbc39STejun Heo EXPORT_SYMBOL_GPL(ata_ehi_clear_desc); 6970c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_eng_timeout); 6971c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_port_schedule_eh); 6972c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_port_abort); 6973c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_port_freeze); 6974c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_eh_freeze_port); 6975c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_eh_thaw_port); 6976c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_eh_qc_complete); 6977c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_eh_qc_retry); 6978c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_do_eh); 697983625006SAkira Iguchi EXPORT_SYMBOL_GPL(ata_irq_on); 698083625006SAkira Iguchi EXPORT_SYMBOL_GPL(ata_dummy_irq_on); 698183625006SAkira Iguchi EXPORT_SYMBOL_GPL(ata_irq_ack); 698283625006SAkira Iguchi EXPORT_SYMBOL_GPL(ata_dummy_irq_ack); 6983a619f981SAkira Iguchi EXPORT_SYMBOL_GPL(ata_dev_try_classify); 6984be0d18dfSAlan Cox 6985be0d18dfSAlan Cox EXPORT_SYMBOL_GPL(ata_cable_40wire); 6986be0d18dfSAlan Cox EXPORT_SYMBOL_GPL(ata_cable_80wire); 6987be0d18dfSAlan Cox EXPORT_SYMBOL_GPL(ata_cable_unknown); 6988be0d18dfSAlan Cox EXPORT_SYMBOL_GPL(ata_cable_sata); 6989