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 * @fis: Buffer into which data will output 115c6fd2807SJeff Garzik * @pmp: Port multiplier port 116c6fd2807SJeff Garzik * 117c6fd2807SJeff Garzik * Converts a standard ATA taskfile to a Serial ATA 118c6fd2807SJeff Garzik * FIS structure (Register - Host to Device). 119c6fd2807SJeff Garzik * 120c6fd2807SJeff Garzik * LOCKING: 121c6fd2807SJeff Garzik * Inherited from caller. 122c6fd2807SJeff Garzik */ 123c6fd2807SJeff Garzik 124c6fd2807SJeff Garzik void ata_tf_to_fis(const struct ata_taskfile *tf, u8 *fis, u8 pmp) 125c6fd2807SJeff Garzik { 126c6fd2807SJeff Garzik fis[0] = 0x27; /* Register - Host to Device FIS */ 127c6fd2807SJeff Garzik fis[1] = (pmp & 0xf) | (1 << 7); /* Port multiplier number, 128c6fd2807SJeff Garzik bit 7 indicates Command FIS */ 129c6fd2807SJeff Garzik fis[2] = tf->command; 130c6fd2807SJeff Garzik fis[3] = tf->feature; 131c6fd2807SJeff Garzik 132c6fd2807SJeff Garzik fis[4] = tf->lbal; 133c6fd2807SJeff Garzik fis[5] = tf->lbam; 134c6fd2807SJeff Garzik fis[6] = tf->lbah; 135c6fd2807SJeff Garzik fis[7] = tf->device; 136c6fd2807SJeff Garzik 137c6fd2807SJeff Garzik fis[8] = tf->hob_lbal; 138c6fd2807SJeff Garzik fis[9] = tf->hob_lbam; 139c6fd2807SJeff Garzik fis[10] = tf->hob_lbah; 140c6fd2807SJeff Garzik fis[11] = tf->hob_feature; 141c6fd2807SJeff Garzik 142c6fd2807SJeff Garzik fis[12] = tf->nsect; 143c6fd2807SJeff Garzik fis[13] = tf->hob_nsect; 144c6fd2807SJeff Garzik fis[14] = 0; 145c6fd2807SJeff Garzik fis[15] = tf->ctl; 146c6fd2807SJeff Garzik 147c6fd2807SJeff Garzik fis[16] = 0; 148c6fd2807SJeff Garzik fis[17] = 0; 149c6fd2807SJeff Garzik fis[18] = 0; 150c6fd2807SJeff Garzik fis[19] = 0; 151c6fd2807SJeff Garzik } 152c6fd2807SJeff Garzik 153c6fd2807SJeff Garzik /** 154c6fd2807SJeff Garzik * ata_tf_from_fis - Convert SATA FIS to ATA taskfile 155c6fd2807SJeff Garzik * @fis: Buffer from which data will be input 156c6fd2807SJeff Garzik * @tf: Taskfile to output 157c6fd2807SJeff Garzik * 158c6fd2807SJeff Garzik * Converts a serial ATA FIS structure to a standard ATA taskfile. 159c6fd2807SJeff Garzik * 160c6fd2807SJeff Garzik * LOCKING: 161c6fd2807SJeff Garzik * Inherited from caller. 162c6fd2807SJeff Garzik */ 163c6fd2807SJeff Garzik 164c6fd2807SJeff Garzik void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf) 165c6fd2807SJeff Garzik { 166c6fd2807SJeff Garzik tf->command = fis[2]; /* status */ 167c6fd2807SJeff Garzik tf->feature = fis[3]; /* error */ 168c6fd2807SJeff Garzik 169c6fd2807SJeff Garzik tf->lbal = fis[4]; 170c6fd2807SJeff Garzik tf->lbam = fis[5]; 171c6fd2807SJeff Garzik tf->lbah = fis[6]; 172c6fd2807SJeff Garzik tf->device = fis[7]; 173c6fd2807SJeff Garzik 174c6fd2807SJeff Garzik tf->hob_lbal = fis[8]; 175c6fd2807SJeff Garzik tf->hob_lbam = fis[9]; 176c6fd2807SJeff Garzik tf->hob_lbah = fis[10]; 177c6fd2807SJeff Garzik 178c6fd2807SJeff Garzik tf->nsect = fis[12]; 179c6fd2807SJeff Garzik tf->hob_nsect = fis[13]; 180c6fd2807SJeff Garzik } 181c6fd2807SJeff Garzik 182c6fd2807SJeff Garzik static const u8 ata_rw_cmds[] = { 183c6fd2807SJeff Garzik /* pio multi */ 184c6fd2807SJeff Garzik ATA_CMD_READ_MULTI, 185c6fd2807SJeff Garzik ATA_CMD_WRITE_MULTI, 186c6fd2807SJeff Garzik ATA_CMD_READ_MULTI_EXT, 187c6fd2807SJeff Garzik ATA_CMD_WRITE_MULTI_EXT, 188c6fd2807SJeff Garzik 0, 189c6fd2807SJeff Garzik 0, 190c6fd2807SJeff Garzik 0, 191c6fd2807SJeff Garzik ATA_CMD_WRITE_MULTI_FUA_EXT, 192c6fd2807SJeff Garzik /* pio */ 193c6fd2807SJeff Garzik ATA_CMD_PIO_READ, 194c6fd2807SJeff Garzik ATA_CMD_PIO_WRITE, 195c6fd2807SJeff Garzik ATA_CMD_PIO_READ_EXT, 196c6fd2807SJeff Garzik ATA_CMD_PIO_WRITE_EXT, 197c6fd2807SJeff Garzik 0, 198c6fd2807SJeff Garzik 0, 199c6fd2807SJeff Garzik 0, 200c6fd2807SJeff Garzik 0, 201c6fd2807SJeff Garzik /* dma */ 202c6fd2807SJeff Garzik ATA_CMD_READ, 203c6fd2807SJeff Garzik ATA_CMD_WRITE, 204c6fd2807SJeff Garzik ATA_CMD_READ_EXT, 205c6fd2807SJeff Garzik ATA_CMD_WRITE_EXT, 206c6fd2807SJeff Garzik 0, 207c6fd2807SJeff Garzik 0, 208c6fd2807SJeff Garzik 0, 209c6fd2807SJeff Garzik ATA_CMD_WRITE_FUA_EXT 210c6fd2807SJeff Garzik }; 211c6fd2807SJeff Garzik 212c6fd2807SJeff Garzik /** 213c6fd2807SJeff Garzik * ata_rwcmd_protocol - set taskfile r/w commands and protocol 214bd056d7eSTejun Heo * @tf: command to examine and configure 215bd056d7eSTejun Heo * @dev: device tf belongs to 216c6fd2807SJeff Garzik * 217c6fd2807SJeff Garzik * Examine the device configuration and tf->flags to calculate 218c6fd2807SJeff Garzik * the proper read/write commands and protocol to use. 219c6fd2807SJeff Garzik * 220c6fd2807SJeff Garzik * LOCKING: 221c6fd2807SJeff Garzik * caller. 222c6fd2807SJeff Garzik */ 223bd056d7eSTejun Heo static int ata_rwcmd_protocol(struct ata_taskfile *tf, struct ata_device *dev) 224c6fd2807SJeff Garzik { 225c6fd2807SJeff Garzik u8 cmd; 226c6fd2807SJeff Garzik 227c6fd2807SJeff Garzik int index, fua, lba48, write; 228c6fd2807SJeff Garzik 229c6fd2807SJeff Garzik fua = (tf->flags & ATA_TFLAG_FUA) ? 4 : 0; 230c6fd2807SJeff Garzik lba48 = (tf->flags & ATA_TFLAG_LBA48) ? 2 : 0; 231c6fd2807SJeff Garzik write = (tf->flags & ATA_TFLAG_WRITE) ? 1 : 0; 232c6fd2807SJeff Garzik 233c6fd2807SJeff Garzik if (dev->flags & ATA_DFLAG_PIO) { 234c6fd2807SJeff Garzik tf->protocol = ATA_PROT_PIO; 235c6fd2807SJeff Garzik index = dev->multi_count ? 0 : 8; 236bd056d7eSTejun Heo } else if (lba48 && (dev->ap->flags & ATA_FLAG_PIO_LBA48)) { 237c6fd2807SJeff Garzik /* Unable to use DMA due to host limitation */ 238c6fd2807SJeff Garzik tf->protocol = ATA_PROT_PIO; 239c6fd2807SJeff Garzik index = dev->multi_count ? 0 : 8; 240c6fd2807SJeff Garzik } else { 241c6fd2807SJeff Garzik tf->protocol = ATA_PROT_DMA; 242c6fd2807SJeff Garzik index = 16; 243c6fd2807SJeff Garzik } 244c6fd2807SJeff Garzik 245c6fd2807SJeff Garzik cmd = ata_rw_cmds[index + fua + lba48 + write]; 246c6fd2807SJeff Garzik if (cmd) { 247c6fd2807SJeff Garzik tf->command = cmd; 248c6fd2807SJeff Garzik return 0; 249c6fd2807SJeff Garzik } 250c6fd2807SJeff Garzik return -1; 251c6fd2807SJeff Garzik } 252c6fd2807SJeff Garzik 253c6fd2807SJeff Garzik /** 25435b649feSTejun Heo * ata_tf_read_block - Read block address from ATA taskfile 25535b649feSTejun Heo * @tf: ATA taskfile of interest 25635b649feSTejun Heo * @dev: ATA device @tf belongs to 25735b649feSTejun Heo * 25835b649feSTejun Heo * LOCKING: 25935b649feSTejun Heo * None. 26035b649feSTejun Heo * 26135b649feSTejun Heo * Read block address from @tf. This function can handle all 26235b649feSTejun Heo * three address formats - LBA, LBA48 and CHS. tf->protocol and 26335b649feSTejun Heo * flags select the address format to use. 26435b649feSTejun Heo * 26535b649feSTejun Heo * RETURNS: 26635b649feSTejun Heo * Block address read from @tf. 26735b649feSTejun Heo */ 26835b649feSTejun Heo u64 ata_tf_read_block(struct ata_taskfile *tf, struct ata_device *dev) 26935b649feSTejun Heo { 27035b649feSTejun Heo u64 block = 0; 27135b649feSTejun Heo 27235b649feSTejun Heo if (tf->flags & ATA_TFLAG_LBA) { 27335b649feSTejun Heo if (tf->flags & ATA_TFLAG_LBA48) { 27435b649feSTejun Heo block |= (u64)tf->hob_lbah << 40; 27535b649feSTejun Heo block |= (u64)tf->hob_lbam << 32; 27635b649feSTejun Heo block |= tf->hob_lbal << 24; 27735b649feSTejun Heo } else 27835b649feSTejun Heo block |= (tf->device & 0xf) << 24; 27935b649feSTejun Heo 28035b649feSTejun Heo block |= tf->lbah << 16; 28135b649feSTejun Heo block |= tf->lbam << 8; 28235b649feSTejun Heo block |= tf->lbal; 28335b649feSTejun Heo } else { 28435b649feSTejun Heo u32 cyl, head, sect; 28535b649feSTejun Heo 28635b649feSTejun Heo cyl = tf->lbam | (tf->lbah << 8); 28735b649feSTejun Heo head = tf->device & 0xf; 28835b649feSTejun Heo sect = tf->lbal; 28935b649feSTejun Heo 29035b649feSTejun Heo block = (cyl * dev->heads + head) * dev->sectors + sect; 29135b649feSTejun Heo } 29235b649feSTejun Heo 29335b649feSTejun Heo return block; 29435b649feSTejun Heo } 29535b649feSTejun Heo 29635b649feSTejun Heo /** 297bd056d7eSTejun Heo * ata_build_rw_tf - Build ATA taskfile for given read/write request 298bd056d7eSTejun Heo * @tf: Target ATA taskfile 299bd056d7eSTejun Heo * @dev: ATA device @tf belongs to 300bd056d7eSTejun Heo * @block: Block address 301bd056d7eSTejun Heo * @n_block: Number of blocks 302bd056d7eSTejun Heo * @tf_flags: RW/FUA etc... 303bd056d7eSTejun Heo * @tag: tag 304bd056d7eSTejun Heo * 305bd056d7eSTejun Heo * LOCKING: 306bd056d7eSTejun Heo * None. 307bd056d7eSTejun Heo * 308bd056d7eSTejun Heo * Build ATA taskfile @tf for read/write request described by 309bd056d7eSTejun Heo * @block, @n_block, @tf_flags and @tag on @dev. 310bd056d7eSTejun Heo * 311bd056d7eSTejun Heo * RETURNS: 312bd056d7eSTejun Heo * 313bd056d7eSTejun Heo * 0 on success, -ERANGE if the request is too large for @dev, 314bd056d7eSTejun Heo * -EINVAL if the request is invalid. 315bd056d7eSTejun Heo */ 316bd056d7eSTejun Heo int ata_build_rw_tf(struct ata_taskfile *tf, struct ata_device *dev, 317bd056d7eSTejun Heo u64 block, u32 n_block, unsigned int tf_flags, 318bd056d7eSTejun Heo unsigned int tag) 319bd056d7eSTejun Heo { 320bd056d7eSTejun Heo tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 321bd056d7eSTejun Heo tf->flags |= tf_flags; 322bd056d7eSTejun Heo 3236d1245bfSTejun Heo if (ata_ncq_enabled(dev) && likely(tag != ATA_TAG_INTERNAL)) { 324bd056d7eSTejun Heo /* yay, NCQ */ 325bd056d7eSTejun Heo if (!lba_48_ok(block, n_block)) 326bd056d7eSTejun Heo return -ERANGE; 327bd056d7eSTejun Heo 328bd056d7eSTejun Heo tf->protocol = ATA_PROT_NCQ; 329bd056d7eSTejun Heo tf->flags |= ATA_TFLAG_LBA | ATA_TFLAG_LBA48; 330bd056d7eSTejun Heo 331bd056d7eSTejun Heo if (tf->flags & ATA_TFLAG_WRITE) 332bd056d7eSTejun Heo tf->command = ATA_CMD_FPDMA_WRITE; 333bd056d7eSTejun Heo else 334bd056d7eSTejun Heo tf->command = ATA_CMD_FPDMA_READ; 335bd056d7eSTejun Heo 336bd056d7eSTejun Heo tf->nsect = tag << 3; 337bd056d7eSTejun Heo tf->hob_feature = (n_block >> 8) & 0xff; 338bd056d7eSTejun Heo tf->feature = n_block & 0xff; 339bd056d7eSTejun Heo 340bd056d7eSTejun Heo tf->hob_lbah = (block >> 40) & 0xff; 341bd056d7eSTejun Heo tf->hob_lbam = (block >> 32) & 0xff; 342bd056d7eSTejun Heo tf->hob_lbal = (block >> 24) & 0xff; 343bd056d7eSTejun Heo tf->lbah = (block >> 16) & 0xff; 344bd056d7eSTejun Heo tf->lbam = (block >> 8) & 0xff; 345bd056d7eSTejun Heo tf->lbal = block & 0xff; 346bd056d7eSTejun Heo 347bd056d7eSTejun Heo tf->device = 1 << 6; 348bd056d7eSTejun Heo if (tf->flags & ATA_TFLAG_FUA) 349bd056d7eSTejun Heo tf->device |= 1 << 7; 350bd056d7eSTejun Heo } else if (dev->flags & ATA_DFLAG_LBA) { 351bd056d7eSTejun Heo tf->flags |= ATA_TFLAG_LBA; 352bd056d7eSTejun Heo 353bd056d7eSTejun Heo if (lba_28_ok(block, n_block)) { 354bd056d7eSTejun Heo /* use LBA28 */ 355bd056d7eSTejun Heo tf->device |= (block >> 24) & 0xf; 356bd056d7eSTejun Heo } else if (lba_48_ok(block, n_block)) { 357bd056d7eSTejun Heo if (!(dev->flags & ATA_DFLAG_LBA48)) 358bd056d7eSTejun Heo return -ERANGE; 359bd056d7eSTejun Heo 360bd056d7eSTejun Heo /* use LBA48 */ 361bd056d7eSTejun Heo tf->flags |= ATA_TFLAG_LBA48; 362bd056d7eSTejun Heo 363bd056d7eSTejun Heo tf->hob_nsect = (n_block >> 8) & 0xff; 364bd056d7eSTejun Heo 365bd056d7eSTejun Heo tf->hob_lbah = (block >> 40) & 0xff; 366bd056d7eSTejun Heo tf->hob_lbam = (block >> 32) & 0xff; 367bd056d7eSTejun Heo tf->hob_lbal = (block >> 24) & 0xff; 368bd056d7eSTejun Heo } else 369bd056d7eSTejun Heo /* request too large even for LBA48 */ 370bd056d7eSTejun Heo return -ERANGE; 371bd056d7eSTejun Heo 372bd056d7eSTejun Heo if (unlikely(ata_rwcmd_protocol(tf, dev) < 0)) 373bd056d7eSTejun Heo return -EINVAL; 374bd056d7eSTejun Heo 375bd056d7eSTejun Heo tf->nsect = n_block & 0xff; 376bd056d7eSTejun Heo 377bd056d7eSTejun Heo tf->lbah = (block >> 16) & 0xff; 378bd056d7eSTejun Heo tf->lbam = (block >> 8) & 0xff; 379bd056d7eSTejun Heo tf->lbal = block & 0xff; 380bd056d7eSTejun Heo 381bd056d7eSTejun Heo tf->device |= ATA_LBA; 382bd056d7eSTejun Heo } else { 383bd056d7eSTejun Heo /* CHS */ 384bd056d7eSTejun Heo u32 sect, head, cyl, track; 385bd056d7eSTejun Heo 386bd056d7eSTejun Heo /* The request -may- be too large for CHS addressing. */ 387bd056d7eSTejun Heo if (!lba_28_ok(block, n_block)) 388bd056d7eSTejun Heo return -ERANGE; 389bd056d7eSTejun Heo 390bd056d7eSTejun Heo if (unlikely(ata_rwcmd_protocol(tf, dev) < 0)) 391bd056d7eSTejun Heo return -EINVAL; 392bd056d7eSTejun Heo 393bd056d7eSTejun Heo /* Convert LBA to CHS */ 394bd056d7eSTejun Heo track = (u32)block / dev->sectors; 395bd056d7eSTejun Heo cyl = track / dev->heads; 396bd056d7eSTejun Heo head = track % dev->heads; 397bd056d7eSTejun Heo sect = (u32)block % dev->sectors + 1; 398bd056d7eSTejun Heo 399bd056d7eSTejun Heo DPRINTK("block %u track %u cyl %u head %u sect %u\n", 400bd056d7eSTejun Heo (u32)block, track, cyl, head, sect); 401bd056d7eSTejun Heo 402bd056d7eSTejun Heo /* Check whether the converted CHS can fit. 403bd056d7eSTejun Heo Cylinder: 0-65535 404bd056d7eSTejun Heo Head: 0-15 405bd056d7eSTejun Heo Sector: 1-255*/ 406bd056d7eSTejun Heo if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect)) 407bd056d7eSTejun Heo return -ERANGE; 408bd056d7eSTejun Heo 409bd056d7eSTejun Heo tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */ 410bd056d7eSTejun Heo tf->lbal = sect; 411bd056d7eSTejun Heo tf->lbam = cyl; 412bd056d7eSTejun Heo tf->lbah = cyl >> 8; 413bd056d7eSTejun Heo tf->device |= head; 414bd056d7eSTejun Heo } 415bd056d7eSTejun Heo 416bd056d7eSTejun Heo return 0; 417bd056d7eSTejun Heo } 418bd056d7eSTejun Heo 419bd056d7eSTejun Heo /** 420c6fd2807SJeff Garzik * ata_pack_xfermask - Pack pio, mwdma and udma masks into xfer_mask 421c6fd2807SJeff Garzik * @pio_mask: pio_mask 422c6fd2807SJeff Garzik * @mwdma_mask: mwdma_mask 423c6fd2807SJeff Garzik * @udma_mask: udma_mask 424c6fd2807SJeff Garzik * 425c6fd2807SJeff Garzik * Pack @pio_mask, @mwdma_mask and @udma_mask into a single 426c6fd2807SJeff Garzik * unsigned int xfer_mask. 427c6fd2807SJeff Garzik * 428c6fd2807SJeff Garzik * LOCKING: 429c6fd2807SJeff Garzik * None. 430c6fd2807SJeff Garzik * 431c6fd2807SJeff Garzik * RETURNS: 432c6fd2807SJeff Garzik * Packed xfer_mask. 433c6fd2807SJeff Garzik */ 434c6fd2807SJeff Garzik static unsigned int ata_pack_xfermask(unsigned int pio_mask, 435c6fd2807SJeff Garzik unsigned int mwdma_mask, 436c6fd2807SJeff Garzik unsigned int udma_mask) 437c6fd2807SJeff Garzik { 438c6fd2807SJeff Garzik return ((pio_mask << ATA_SHIFT_PIO) & ATA_MASK_PIO) | 439c6fd2807SJeff Garzik ((mwdma_mask << ATA_SHIFT_MWDMA) & ATA_MASK_MWDMA) | 440c6fd2807SJeff Garzik ((udma_mask << ATA_SHIFT_UDMA) & ATA_MASK_UDMA); 441c6fd2807SJeff Garzik } 442c6fd2807SJeff Garzik 443c6fd2807SJeff Garzik /** 444c6fd2807SJeff Garzik * ata_unpack_xfermask - Unpack xfer_mask into pio, mwdma and udma masks 445c6fd2807SJeff Garzik * @xfer_mask: xfer_mask to unpack 446c6fd2807SJeff Garzik * @pio_mask: resulting pio_mask 447c6fd2807SJeff Garzik * @mwdma_mask: resulting mwdma_mask 448c6fd2807SJeff Garzik * @udma_mask: resulting udma_mask 449c6fd2807SJeff Garzik * 450c6fd2807SJeff Garzik * Unpack @xfer_mask into @pio_mask, @mwdma_mask and @udma_mask. 451c6fd2807SJeff Garzik * Any NULL distination masks will be ignored. 452c6fd2807SJeff Garzik */ 453c6fd2807SJeff Garzik static void ata_unpack_xfermask(unsigned int xfer_mask, 454c6fd2807SJeff Garzik unsigned int *pio_mask, 455c6fd2807SJeff Garzik unsigned int *mwdma_mask, 456c6fd2807SJeff Garzik unsigned int *udma_mask) 457c6fd2807SJeff Garzik { 458c6fd2807SJeff Garzik if (pio_mask) 459c6fd2807SJeff Garzik *pio_mask = (xfer_mask & ATA_MASK_PIO) >> ATA_SHIFT_PIO; 460c6fd2807SJeff Garzik if (mwdma_mask) 461c6fd2807SJeff Garzik *mwdma_mask = (xfer_mask & ATA_MASK_MWDMA) >> ATA_SHIFT_MWDMA; 462c6fd2807SJeff Garzik if (udma_mask) 463c6fd2807SJeff Garzik *udma_mask = (xfer_mask & ATA_MASK_UDMA) >> ATA_SHIFT_UDMA; 464c6fd2807SJeff Garzik } 465c6fd2807SJeff Garzik 466c6fd2807SJeff Garzik static const struct ata_xfer_ent { 467c6fd2807SJeff Garzik int shift, bits; 468c6fd2807SJeff Garzik u8 base; 469c6fd2807SJeff Garzik } ata_xfer_tbl[] = { 470c6fd2807SJeff Garzik { ATA_SHIFT_PIO, ATA_BITS_PIO, XFER_PIO_0 }, 471c6fd2807SJeff Garzik { ATA_SHIFT_MWDMA, ATA_BITS_MWDMA, XFER_MW_DMA_0 }, 472c6fd2807SJeff Garzik { ATA_SHIFT_UDMA, ATA_BITS_UDMA, XFER_UDMA_0 }, 473c6fd2807SJeff Garzik { -1, }, 474c6fd2807SJeff Garzik }; 475c6fd2807SJeff Garzik 476c6fd2807SJeff Garzik /** 477c6fd2807SJeff Garzik * ata_xfer_mask2mode - Find matching XFER_* for the given xfer_mask 478c6fd2807SJeff Garzik * @xfer_mask: xfer_mask of interest 479c6fd2807SJeff Garzik * 480c6fd2807SJeff Garzik * Return matching XFER_* value for @xfer_mask. Only the highest 481c6fd2807SJeff Garzik * bit of @xfer_mask is considered. 482c6fd2807SJeff Garzik * 483c6fd2807SJeff Garzik * LOCKING: 484c6fd2807SJeff Garzik * None. 485c6fd2807SJeff Garzik * 486c6fd2807SJeff Garzik * RETURNS: 487c6fd2807SJeff Garzik * Matching XFER_* value, 0 if no match found. 488c6fd2807SJeff Garzik */ 489c6fd2807SJeff Garzik static u8 ata_xfer_mask2mode(unsigned int xfer_mask) 490c6fd2807SJeff Garzik { 491c6fd2807SJeff Garzik int highbit = fls(xfer_mask) - 1; 492c6fd2807SJeff Garzik const struct ata_xfer_ent *ent; 493c6fd2807SJeff Garzik 494c6fd2807SJeff Garzik for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) 495c6fd2807SJeff Garzik if (highbit >= ent->shift && highbit < ent->shift + ent->bits) 496c6fd2807SJeff Garzik return ent->base + highbit - ent->shift; 497c6fd2807SJeff Garzik return 0; 498c6fd2807SJeff Garzik } 499c6fd2807SJeff Garzik 500c6fd2807SJeff Garzik /** 501c6fd2807SJeff Garzik * ata_xfer_mode2mask - Find matching xfer_mask for XFER_* 502c6fd2807SJeff Garzik * @xfer_mode: XFER_* of interest 503c6fd2807SJeff Garzik * 504c6fd2807SJeff Garzik * Return matching xfer_mask for @xfer_mode. 505c6fd2807SJeff Garzik * 506c6fd2807SJeff Garzik * LOCKING: 507c6fd2807SJeff Garzik * None. 508c6fd2807SJeff Garzik * 509c6fd2807SJeff Garzik * RETURNS: 510c6fd2807SJeff Garzik * Matching xfer_mask, 0 if no match found. 511c6fd2807SJeff Garzik */ 512c6fd2807SJeff Garzik static unsigned int ata_xfer_mode2mask(u8 xfer_mode) 513c6fd2807SJeff Garzik { 514c6fd2807SJeff Garzik const struct ata_xfer_ent *ent; 515c6fd2807SJeff Garzik 516c6fd2807SJeff Garzik for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) 517c6fd2807SJeff Garzik if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits) 518c6fd2807SJeff Garzik return 1 << (ent->shift + xfer_mode - ent->base); 519c6fd2807SJeff Garzik return 0; 520c6fd2807SJeff Garzik } 521c6fd2807SJeff Garzik 522c6fd2807SJeff Garzik /** 523c6fd2807SJeff Garzik * ata_xfer_mode2shift - Find matching xfer_shift for XFER_* 524c6fd2807SJeff Garzik * @xfer_mode: XFER_* of interest 525c6fd2807SJeff Garzik * 526c6fd2807SJeff Garzik * Return matching xfer_shift for @xfer_mode. 527c6fd2807SJeff Garzik * 528c6fd2807SJeff Garzik * LOCKING: 529c6fd2807SJeff Garzik * None. 530c6fd2807SJeff Garzik * 531c6fd2807SJeff Garzik * RETURNS: 532c6fd2807SJeff Garzik * Matching xfer_shift, -1 if no match found. 533c6fd2807SJeff Garzik */ 534c6fd2807SJeff Garzik static int ata_xfer_mode2shift(unsigned int xfer_mode) 535c6fd2807SJeff Garzik { 536c6fd2807SJeff Garzik const struct ata_xfer_ent *ent; 537c6fd2807SJeff Garzik 538c6fd2807SJeff Garzik for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) 539c6fd2807SJeff Garzik if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits) 540c6fd2807SJeff Garzik return ent->shift; 541c6fd2807SJeff Garzik return -1; 542c6fd2807SJeff Garzik } 543c6fd2807SJeff Garzik 544c6fd2807SJeff Garzik /** 545c6fd2807SJeff Garzik * ata_mode_string - convert xfer_mask to string 546c6fd2807SJeff Garzik * @xfer_mask: mask of bits supported; only highest bit counts. 547c6fd2807SJeff Garzik * 548c6fd2807SJeff Garzik * Determine string which represents the highest speed 549c6fd2807SJeff Garzik * (highest bit in @modemask). 550c6fd2807SJeff Garzik * 551c6fd2807SJeff Garzik * LOCKING: 552c6fd2807SJeff Garzik * None. 553c6fd2807SJeff Garzik * 554c6fd2807SJeff Garzik * RETURNS: 555c6fd2807SJeff Garzik * Constant C string representing highest speed listed in 556c6fd2807SJeff Garzik * @mode_mask, or the constant C string "<n/a>". 557c6fd2807SJeff Garzik */ 558c6fd2807SJeff Garzik static const char *ata_mode_string(unsigned int xfer_mask) 559c6fd2807SJeff Garzik { 560c6fd2807SJeff Garzik static const char * const xfer_mode_str[] = { 561c6fd2807SJeff Garzik "PIO0", 562c6fd2807SJeff Garzik "PIO1", 563c6fd2807SJeff Garzik "PIO2", 564c6fd2807SJeff Garzik "PIO3", 565c6fd2807SJeff Garzik "PIO4", 566b352e57dSAlan Cox "PIO5", 567b352e57dSAlan Cox "PIO6", 568c6fd2807SJeff Garzik "MWDMA0", 569c6fd2807SJeff Garzik "MWDMA1", 570c6fd2807SJeff Garzik "MWDMA2", 571b352e57dSAlan Cox "MWDMA3", 572b352e57dSAlan Cox "MWDMA4", 573c6fd2807SJeff Garzik "UDMA/16", 574c6fd2807SJeff Garzik "UDMA/25", 575c6fd2807SJeff Garzik "UDMA/33", 576c6fd2807SJeff Garzik "UDMA/44", 577c6fd2807SJeff Garzik "UDMA/66", 578c6fd2807SJeff Garzik "UDMA/100", 579c6fd2807SJeff Garzik "UDMA/133", 580c6fd2807SJeff Garzik "UDMA7", 581c6fd2807SJeff Garzik }; 582c6fd2807SJeff Garzik int highbit; 583c6fd2807SJeff Garzik 584c6fd2807SJeff Garzik highbit = fls(xfer_mask) - 1; 585c6fd2807SJeff Garzik if (highbit >= 0 && highbit < ARRAY_SIZE(xfer_mode_str)) 586c6fd2807SJeff Garzik return xfer_mode_str[highbit]; 587c6fd2807SJeff Garzik return "<n/a>"; 588c6fd2807SJeff Garzik } 589c6fd2807SJeff Garzik 590c6fd2807SJeff Garzik static const char *sata_spd_string(unsigned int spd) 591c6fd2807SJeff Garzik { 592c6fd2807SJeff Garzik static const char * const spd_str[] = { 593c6fd2807SJeff Garzik "1.5 Gbps", 594c6fd2807SJeff Garzik "3.0 Gbps", 595c6fd2807SJeff Garzik }; 596c6fd2807SJeff Garzik 597c6fd2807SJeff Garzik if (spd == 0 || (spd - 1) >= ARRAY_SIZE(spd_str)) 598c6fd2807SJeff Garzik return "<unknown>"; 599c6fd2807SJeff Garzik return spd_str[spd - 1]; 600c6fd2807SJeff Garzik } 601c6fd2807SJeff Garzik 602c6fd2807SJeff Garzik void ata_dev_disable(struct ata_device *dev) 603c6fd2807SJeff Garzik { 60409d7f9b0STejun Heo if (ata_dev_enabled(dev)) { 60509d7f9b0STejun Heo if (ata_msg_drv(dev->ap)) 606c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_WARNING, "disabled\n"); 6074ae72a1eSTejun Heo ata_down_xfermask_limit(dev, ATA_DNXFER_FORCE_PIO0 | 6084ae72a1eSTejun Heo ATA_DNXFER_QUIET); 609c6fd2807SJeff Garzik dev->class++; 610c6fd2807SJeff Garzik } 611c6fd2807SJeff Garzik } 612c6fd2807SJeff Garzik 613c6fd2807SJeff Garzik /** 614c6fd2807SJeff Garzik * ata_devchk - PATA device presence detection 615c6fd2807SJeff Garzik * @ap: ATA channel to examine 616c6fd2807SJeff Garzik * @device: Device to examine (starting at zero) 617c6fd2807SJeff Garzik * 6180d5ff566STejun Heo * This technique was originally described in 6190d5ff566STejun Heo * Hale Landis's ATADRVR (www.ata-atapi.com), and 6200d5ff566STejun Heo * later found its way into the ATA/ATAPI spec. 6210d5ff566STejun Heo * 6220d5ff566STejun Heo * Write a pattern to the ATA shadow registers, 6230d5ff566STejun Heo * and if a device is present, it will respond by 6240d5ff566STejun Heo * correctly storing and echoing back the 6250d5ff566STejun Heo * ATA shadow register contents. 626c6fd2807SJeff Garzik * 627c6fd2807SJeff Garzik * LOCKING: 628c6fd2807SJeff Garzik * caller. 629c6fd2807SJeff Garzik */ 630c6fd2807SJeff Garzik 6310d5ff566STejun Heo static unsigned int ata_devchk(struct ata_port *ap, unsigned int device) 632c6fd2807SJeff Garzik { 6330d5ff566STejun Heo struct ata_ioports *ioaddr = &ap->ioaddr; 6340d5ff566STejun Heo u8 nsect, lbal; 6350d5ff566STejun Heo 6360d5ff566STejun Heo ap->ops->dev_select(ap, device); 6370d5ff566STejun Heo 6380d5ff566STejun Heo iowrite8(0x55, ioaddr->nsect_addr); 6390d5ff566STejun Heo iowrite8(0xaa, ioaddr->lbal_addr); 6400d5ff566STejun Heo 6410d5ff566STejun Heo iowrite8(0xaa, ioaddr->nsect_addr); 6420d5ff566STejun Heo iowrite8(0x55, ioaddr->lbal_addr); 6430d5ff566STejun Heo 6440d5ff566STejun Heo iowrite8(0x55, ioaddr->nsect_addr); 6450d5ff566STejun Heo iowrite8(0xaa, ioaddr->lbal_addr); 6460d5ff566STejun Heo 6470d5ff566STejun Heo nsect = ioread8(ioaddr->nsect_addr); 6480d5ff566STejun Heo lbal = ioread8(ioaddr->lbal_addr); 6490d5ff566STejun Heo 6500d5ff566STejun Heo if ((nsect == 0x55) && (lbal == 0xaa)) 6510d5ff566STejun Heo return 1; /* we found a device */ 6520d5ff566STejun Heo 6530d5ff566STejun Heo return 0; /* nothing found */ 654c6fd2807SJeff Garzik } 655c6fd2807SJeff Garzik 656c6fd2807SJeff Garzik /** 657c6fd2807SJeff Garzik * ata_dev_classify - determine device type based on ATA-spec signature 658c6fd2807SJeff Garzik * @tf: ATA taskfile register set for device to be identified 659c6fd2807SJeff Garzik * 660c6fd2807SJeff Garzik * Determine from taskfile register contents whether a device is 661c6fd2807SJeff Garzik * ATA or ATAPI, as per "Signature and persistence" section 662c6fd2807SJeff Garzik * of ATA/PI spec (volume 1, sect 5.14). 663c6fd2807SJeff Garzik * 664c6fd2807SJeff Garzik * LOCKING: 665c6fd2807SJeff Garzik * None. 666c6fd2807SJeff Garzik * 667c6fd2807SJeff Garzik * RETURNS: 668c6fd2807SJeff Garzik * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, or %ATA_DEV_UNKNOWN 669c6fd2807SJeff Garzik * the event of failure. 670c6fd2807SJeff Garzik */ 671c6fd2807SJeff Garzik 672c6fd2807SJeff Garzik unsigned int ata_dev_classify(const struct ata_taskfile *tf) 673c6fd2807SJeff Garzik { 674c6fd2807SJeff Garzik /* Apple's open source Darwin code hints that some devices only 675c6fd2807SJeff Garzik * put a proper signature into the LBA mid/high registers, 676c6fd2807SJeff Garzik * So, we only check those. It's sufficient for uniqueness. 677c6fd2807SJeff Garzik */ 678c6fd2807SJeff Garzik 679c6fd2807SJeff Garzik if (((tf->lbam == 0) && (tf->lbah == 0)) || 680c6fd2807SJeff Garzik ((tf->lbam == 0x3c) && (tf->lbah == 0xc3))) { 681c6fd2807SJeff Garzik DPRINTK("found ATA device by sig\n"); 682c6fd2807SJeff Garzik return ATA_DEV_ATA; 683c6fd2807SJeff Garzik } 684c6fd2807SJeff Garzik 685c6fd2807SJeff Garzik if (((tf->lbam == 0x14) && (tf->lbah == 0xeb)) || 686c6fd2807SJeff Garzik ((tf->lbam == 0x69) && (tf->lbah == 0x96))) { 687c6fd2807SJeff Garzik DPRINTK("found ATAPI device by sig\n"); 688c6fd2807SJeff Garzik return ATA_DEV_ATAPI; 689c6fd2807SJeff Garzik } 690c6fd2807SJeff Garzik 691c6fd2807SJeff Garzik DPRINTK("unknown device\n"); 692c6fd2807SJeff Garzik return ATA_DEV_UNKNOWN; 693c6fd2807SJeff Garzik } 694c6fd2807SJeff Garzik 695c6fd2807SJeff Garzik /** 696c6fd2807SJeff Garzik * ata_dev_try_classify - Parse returned ATA device signature 697c6fd2807SJeff Garzik * @ap: ATA channel to examine 698c6fd2807SJeff Garzik * @device: Device to examine (starting at zero) 699c6fd2807SJeff Garzik * @r_err: Value of error register on completion 700c6fd2807SJeff Garzik * 701c6fd2807SJeff Garzik * After an event -- SRST, E.D.D., or SATA COMRESET -- occurs, 702c6fd2807SJeff Garzik * an ATA/ATAPI-defined set of values is placed in the ATA 703c6fd2807SJeff Garzik * shadow registers, indicating the results of device detection 704c6fd2807SJeff Garzik * and diagnostics. 705c6fd2807SJeff Garzik * 706c6fd2807SJeff Garzik * Select the ATA device, and read the values from the ATA shadow 707c6fd2807SJeff Garzik * registers. Then parse according to the Error register value, 708c6fd2807SJeff Garzik * and the spec-defined values examined by ata_dev_classify(). 709c6fd2807SJeff Garzik * 710c6fd2807SJeff Garzik * LOCKING: 711c6fd2807SJeff Garzik * caller. 712c6fd2807SJeff Garzik * 713c6fd2807SJeff Garzik * RETURNS: 714c6fd2807SJeff Garzik * Device type - %ATA_DEV_ATA, %ATA_DEV_ATAPI or %ATA_DEV_NONE. 715c6fd2807SJeff Garzik */ 716c6fd2807SJeff Garzik 717a619f981SAkira Iguchi unsigned int 718c6fd2807SJeff Garzik ata_dev_try_classify(struct ata_port *ap, unsigned int device, u8 *r_err) 719c6fd2807SJeff Garzik { 720c6fd2807SJeff Garzik struct ata_taskfile tf; 721c6fd2807SJeff Garzik unsigned int class; 722c6fd2807SJeff Garzik u8 err; 723c6fd2807SJeff Garzik 724c6fd2807SJeff Garzik ap->ops->dev_select(ap, device); 725c6fd2807SJeff Garzik 726c6fd2807SJeff Garzik memset(&tf, 0, sizeof(tf)); 727c6fd2807SJeff Garzik 728c6fd2807SJeff Garzik ap->ops->tf_read(ap, &tf); 729c6fd2807SJeff Garzik err = tf.feature; 730c6fd2807SJeff Garzik if (r_err) 731c6fd2807SJeff Garzik *r_err = err; 732c6fd2807SJeff Garzik 73393590859SAlan Cox /* see if device passed diags: if master then continue and warn later */ 73493590859SAlan Cox if (err == 0 && device == 0) 73593590859SAlan Cox /* diagnostic fail : do nothing _YET_ */ 73693590859SAlan Cox ap->device[device].horkage |= ATA_HORKAGE_DIAGNOSTIC; 73793590859SAlan Cox else if (err == 1) 738c6fd2807SJeff Garzik /* do nothing */ ; 739c6fd2807SJeff Garzik else if ((device == 0) && (err == 0x81)) 740c6fd2807SJeff Garzik /* do nothing */ ; 741c6fd2807SJeff Garzik else 742c6fd2807SJeff Garzik return ATA_DEV_NONE; 743c6fd2807SJeff Garzik 744c6fd2807SJeff Garzik /* determine if device is ATA or ATAPI */ 745c6fd2807SJeff Garzik class = ata_dev_classify(&tf); 746c6fd2807SJeff Garzik 747c6fd2807SJeff Garzik if (class == ATA_DEV_UNKNOWN) 748c6fd2807SJeff Garzik return ATA_DEV_NONE; 749c6fd2807SJeff Garzik if ((class == ATA_DEV_ATA) && (ata_chk_status(ap) == 0)) 750c6fd2807SJeff Garzik return ATA_DEV_NONE; 751c6fd2807SJeff Garzik return class; 752c6fd2807SJeff Garzik } 753c6fd2807SJeff Garzik 754c6fd2807SJeff Garzik /** 755c6fd2807SJeff Garzik * ata_id_string - Convert IDENTIFY DEVICE page into string 756c6fd2807SJeff Garzik * @id: IDENTIFY DEVICE results we will examine 757c6fd2807SJeff Garzik * @s: string into which data is output 758c6fd2807SJeff Garzik * @ofs: offset into identify device page 759c6fd2807SJeff Garzik * @len: length of string to return. must be an even number. 760c6fd2807SJeff Garzik * 761c6fd2807SJeff Garzik * The strings in the IDENTIFY DEVICE page are broken up into 762c6fd2807SJeff Garzik * 16-bit chunks. Run through the string, and output each 763c6fd2807SJeff Garzik * 8-bit chunk linearly, regardless of platform. 764c6fd2807SJeff Garzik * 765c6fd2807SJeff Garzik * LOCKING: 766c6fd2807SJeff Garzik * caller. 767c6fd2807SJeff Garzik */ 768c6fd2807SJeff Garzik 769c6fd2807SJeff Garzik void ata_id_string(const u16 *id, unsigned char *s, 770c6fd2807SJeff Garzik unsigned int ofs, unsigned int len) 771c6fd2807SJeff Garzik { 772c6fd2807SJeff Garzik unsigned int c; 773c6fd2807SJeff Garzik 774c6fd2807SJeff Garzik while (len > 0) { 775c6fd2807SJeff Garzik c = id[ofs] >> 8; 776c6fd2807SJeff Garzik *s = c; 777c6fd2807SJeff Garzik s++; 778c6fd2807SJeff Garzik 779c6fd2807SJeff Garzik c = id[ofs] & 0xff; 780c6fd2807SJeff Garzik *s = c; 781c6fd2807SJeff Garzik s++; 782c6fd2807SJeff Garzik 783c6fd2807SJeff Garzik ofs++; 784c6fd2807SJeff Garzik len -= 2; 785c6fd2807SJeff Garzik } 786c6fd2807SJeff Garzik } 787c6fd2807SJeff Garzik 788c6fd2807SJeff Garzik /** 789c6fd2807SJeff Garzik * ata_id_c_string - Convert IDENTIFY DEVICE page into C string 790c6fd2807SJeff Garzik * @id: IDENTIFY DEVICE results we will examine 791c6fd2807SJeff Garzik * @s: string into which data is output 792c6fd2807SJeff Garzik * @ofs: offset into identify device page 793c6fd2807SJeff Garzik * @len: length of string to return. must be an odd number. 794c6fd2807SJeff Garzik * 795c6fd2807SJeff Garzik * This function is identical to ata_id_string except that it 796c6fd2807SJeff Garzik * trims trailing spaces and terminates the resulting string with 797c6fd2807SJeff Garzik * null. @len must be actual maximum length (even number) + 1. 798c6fd2807SJeff Garzik * 799c6fd2807SJeff Garzik * LOCKING: 800c6fd2807SJeff Garzik * caller. 801c6fd2807SJeff Garzik */ 802c6fd2807SJeff Garzik void ata_id_c_string(const u16 *id, unsigned char *s, 803c6fd2807SJeff Garzik unsigned int ofs, unsigned int len) 804c6fd2807SJeff Garzik { 805c6fd2807SJeff Garzik unsigned char *p; 806c6fd2807SJeff Garzik 807c6fd2807SJeff Garzik WARN_ON(!(len & 1)); 808c6fd2807SJeff Garzik 809c6fd2807SJeff Garzik ata_id_string(id, s, ofs, len - 1); 810c6fd2807SJeff Garzik 811c6fd2807SJeff Garzik p = s + strnlen(s, len - 1); 812c6fd2807SJeff Garzik while (p > s && p[-1] == ' ') 813c6fd2807SJeff Garzik p--; 814c6fd2807SJeff Garzik *p = '\0'; 815c6fd2807SJeff Garzik } 816c6fd2807SJeff Garzik 8171e999736SAlan Cox static u64 ata_tf_to_lba48(struct ata_taskfile *tf) 8181e999736SAlan Cox { 8191e999736SAlan Cox u64 sectors = 0; 8201e999736SAlan Cox 8211e999736SAlan Cox sectors |= ((u64)(tf->hob_lbah & 0xff)) << 40; 8221e999736SAlan Cox sectors |= ((u64)(tf->hob_lbam & 0xff)) << 32; 8231e999736SAlan Cox sectors |= (tf->hob_lbal & 0xff) << 24; 8241e999736SAlan Cox sectors |= (tf->lbah & 0xff) << 16; 8251e999736SAlan Cox sectors |= (tf->lbam & 0xff) << 8; 8261e999736SAlan Cox sectors |= (tf->lbal & 0xff); 8271e999736SAlan Cox 8281e999736SAlan Cox return ++sectors; 8291e999736SAlan Cox } 8301e999736SAlan Cox 8311e999736SAlan Cox static u64 ata_tf_to_lba(struct ata_taskfile *tf) 8321e999736SAlan Cox { 8331e999736SAlan Cox u64 sectors = 0; 8341e999736SAlan Cox 8351e999736SAlan Cox sectors |= (tf->device & 0x0f) << 24; 8361e999736SAlan Cox sectors |= (tf->lbah & 0xff) << 16; 8371e999736SAlan Cox sectors |= (tf->lbam & 0xff) << 8; 8381e999736SAlan Cox sectors |= (tf->lbal & 0xff); 8391e999736SAlan Cox 8401e999736SAlan Cox return ++sectors; 8411e999736SAlan Cox } 8421e999736SAlan Cox 8431e999736SAlan Cox /** 8441e999736SAlan Cox * ata_read_native_max_address_ext - LBA48 native max query 8451e999736SAlan Cox * @dev: Device to query 8461e999736SAlan Cox * 8471e999736SAlan Cox * Perform an LBA48 size query upon the device in question. Return the 8481e999736SAlan Cox * actual LBA48 size or zero if the command fails. 8491e999736SAlan Cox */ 8501e999736SAlan Cox 8511e999736SAlan Cox static u64 ata_read_native_max_address_ext(struct ata_device *dev) 8521e999736SAlan Cox { 8531e999736SAlan Cox unsigned int err; 8541e999736SAlan Cox struct ata_taskfile tf; 8551e999736SAlan Cox 8561e999736SAlan Cox ata_tf_init(dev, &tf); 8571e999736SAlan Cox 8581e999736SAlan Cox tf.command = ATA_CMD_READ_NATIVE_MAX_EXT; 8591e999736SAlan Cox tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48 | ATA_TFLAG_ISADDR; 8601e999736SAlan Cox tf.protocol |= ATA_PROT_NODATA; 8611e999736SAlan Cox tf.device |= 0x40; 8621e999736SAlan Cox 8631e999736SAlan Cox err = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0); 8641e999736SAlan Cox if (err) 8651e999736SAlan Cox return 0; 8661e999736SAlan Cox 8671e999736SAlan Cox return ata_tf_to_lba48(&tf); 8681e999736SAlan Cox } 8691e999736SAlan Cox 8701e999736SAlan Cox /** 8711e999736SAlan Cox * ata_read_native_max_address - LBA28 native max query 8721e999736SAlan Cox * @dev: Device to query 8731e999736SAlan Cox * 8741e999736SAlan Cox * Performa an LBA28 size query upon the device in question. Return the 8751e999736SAlan Cox * actual LBA28 size or zero if the command fails. 8761e999736SAlan Cox */ 8771e999736SAlan Cox 8781e999736SAlan Cox static u64 ata_read_native_max_address(struct ata_device *dev) 8791e999736SAlan Cox { 8801e999736SAlan Cox unsigned int err; 8811e999736SAlan Cox struct ata_taskfile tf; 8821e999736SAlan Cox 8831e999736SAlan Cox ata_tf_init(dev, &tf); 8841e999736SAlan Cox 8851e999736SAlan Cox tf.command = ATA_CMD_READ_NATIVE_MAX; 8861e999736SAlan Cox tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; 8871e999736SAlan Cox tf.protocol |= ATA_PROT_NODATA; 8881e999736SAlan Cox tf.device |= 0x40; 8891e999736SAlan Cox 8901e999736SAlan Cox err = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0); 8911e999736SAlan Cox if (err) 8921e999736SAlan Cox return 0; 8931e999736SAlan Cox 8941e999736SAlan Cox return ata_tf_to_lba(&tf); 8951e999736SAlan Cox } 8961e999736SAlan Cox 8971e999736SAlan Cox /** 8981e999736SAlan Cox * ata_set_native_max_address_ext - LBA48 native max set 8991e999736SAlan Cox * @dev: Device to query 9006b38d1d1SRandy Dunlap * @new_sectors: new max sectors value to set for the device 9011e999736SAlan Cox * 9021e999736SAlan Cox * Perform an LBA48 size set max upon the device in question. Return the 9031e999736SAlan Cox * actual LBA48 size or zero if the command fails. 9041e999736SAlan Cox */ 9051e999736SAlan Cox 9061e999736SAlan Cox static u64 ata_set_native_max_address_ext(struct ata_device *dev, u64 new_sectors) 9071e999736SAlan Cox { 9081e999736SAlan Cox unsigned int err; 9091e999736SAlan Cox struct ata_taskfile tf; 9101e999736SAlan Cox 9111e999736SAlan Cox new_sectors--; 9121e999736SAlan Cox 9131e999736SAlan Cox ata_tf_init(dev, &tf); 9141e999736SAlan Cox 9151e999736SAlan Cox tf.command = ATA_CMD_SET_MAX_EXT; 9161e999736SAlan Cox tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48 | ATA_TFLAG_ISADDR; 9171e999736SAlan Cox tf.protocol |= ATA_PROT_NODATA; 9181e999736SAlan Cox tf.device |= 0x40; 9191e999736SAlan Cox 9201e999736SAlan Cox tf.lbal = (new_sectors >> 0) & 0xff; 9211e999736SAlan Cox tf.lbam = (new_sectors >> 8) & 0xff; 9221e999736SAlan Cox tf.lbah = (new_sectors >> 16) & 0xff; 9231e999736SAlan Cox 9241e999736SAlan Cox tf.hob_lbal = (new_sectors >> 24) & 0xff; 9251e999736SAlan Cox tf.hob_lbam = (new_sectors >> 32) & 0xff; 9261e999736SAlan Cox tf.hob_lbah = (new_sectors >> 40) & 0xff; 9271e999736SAlan Cox 9281e999736SAlan Cox err = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0); 9291e999736SAlan Cox if (err) 9301e999736SAlan Cox return 0; 9311e999736SAlan Cox 9321e999736SAlan Cox return ata_tf_to_lba48(&tf); 9331e999736SAlan Cox } 9341e999736SAlan Cox 9351e999736SAlan Cox /** 9361e999736SAlan Cox * ata_set_native_max_address - LBA28 native max set 9371e999736SAlan Cox * @dev: Device to query 9386b38d1d1SRandy Dunlap * @new_sectors: new max sectors value to set for the device 9391e999736SAlan Cox * 9401e999736SAlan Cox * Perform an LBA28 size set max upon the device in question. Return the 9411e999736SAlan Cox * actual LBA28 size or zero if the command fails. 9421e999736SAlan Cox */ 9431e999736SAlan Cox 9441e999736SAlan Cox static u64 ata_set_native_max_address(struct ata_device *dev, u64 new_sectors) 9451e999736SAlan Cox { 9461e999736SAlan Cox unsigned int err; 9471e999736SAlan Cox struct ata_taskfile tf; 9481e999736SAlan Cox 9491e999736SAlan Cox new_sectors--; 9501e999736SAlan Cox 9511e999736SAlan Cox ata_tf_init(dev, &tf); 9521e999736SAlan Cox 9531e999736SAlan Cox tf.command = ATA_CMD_SET_MAX; 9541e999736SAlan Cox tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; 9551e999736SAlan Cox tf.protocol |= ATA_PROT_NODATA; 9561e999736SAlan Cox 9571e999736SAlan Cox tf.lbal = (new_sectors >> 0) & 0xff; 9581e999736SAlan Cox tf.lbam = (new_sectors >> 8) & 0xff; 9591e999736SAlan Cox tf.lbah = (new_sectors >> 16) & 0xff; 9601e999736SAlan Cox tf.device |= ((new_sectors >> 24) & 0x0f) | 0x40; 9611e999736SAlan Cox 9621e999736SAlan Cox err = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0); 9631e999736SAlan Cox if (err) 9641e999736SAlan Cox return 0; 9651e999736SAlan Cox 9661e999736SAlan Cox return ata_tf_to_lba(&tf); 9671e999736SAlan Cox } 9681e999736SAlan Cox 9691e999736SAlan Cox /** 9701e999736SAlan Cox * ata_hpa_resize - Resize a device with an HPA set 9711e999736SAlan Cox * @dev: Device to resize 9721e999736SAlan Cox * 9731e999736SAlan Cox * Read the size of an LBA28 or LBA48 disk with HPA features and resize 9741e999736SAlan Cox * it if required to the full size of the media. The caller must check 9751e999736SAlan Cox * the drive has the HPA feature set enabled. 9761e999736SAlan Cox */ 9771e999736SAlan Cox 9781e999736SAlan Cox static u64 ata_hpa_resize(struct ata_device *dev) 9791e999736SAlan Cox { 9801e999736SAlan Cox u64 sectors = dev->n_sectors; 9811e999736SAlan Cox u64 hpa_sectors; 9821e999736SAlan Cox 9831e999736SAlan Cox if (ata_id_has_lba48(dev->id)) 9841e999736SAlan Cox hpa_sectors = ata_read_native_max_address_ext(dev); 9851e999736SAlan Cox else 9861e999736SAlan Cox hpa_sectors = ata_read_native_max_address(dev); 9871e999736SAlan Cox 9881e999736SAlan Cox if (hpa_sectors > sectors) { 9891e999736SAlan Cox ata_dev_printk(dev, KERN_INFO, 9901e999736SAlan Cox "Host Protected Area detected:\n" 9911e999736SAlan Cox "\tcurrent size: %lld sectors\n" 9921e999736SAlan Cox "\tnative size: %lld sectors\n", 993bd1d5ec6SAndrew Morton (long long)sectors, (long long)hpa_sectors); 9941e999736SAlan Cox 9951e999736SAlan Cox if (ata_ignore_hpa) { 9961e999736SAlan Cox if (ata_id_has_lba48(dev->id)) 9971e999736SAlan Cox hpa_sectors = ata_set_native_max_address_ext(dev, hpa_sectors); 9981e999736SAlan Cox else 999bd1d5ec6SAndrew Morton hpa_sectors = ata_set_native_max_address(dev, 1000bd1d5ec6SAndrew Morton hpa_sectors); 10011e999736SAlan Cox 10021e999736SAlan Cox if (hpa_sectors) { 1003bd1d5ec6SAndrew Morton ata_dev_printk(dev, KERN_INFO, "native size " 1004bd1d5ec6SAndrew Morton "increased to %lld sectors\n", 1005bd1d5ec6SAndrew Morton (long long)hpa_sectors); 10061e999736SAlan Cox return hpa_sectors; 10071e999736SAlan Cox } 10081e999736SAlan Cox } 100937301a55STejun Heo } else if (hpa_sectors < sectors) 101037301a55STejun Heo ata_dev_printk(dev, KERN_WARNING, "%s 1: hpa sectors (%lld) " 101137301a55STejun Heo "is smaller than sectors (%lld)\n", __FUNCTION__, 101237301a55STejun Heo (long long)hpa_sectors, (long long)sectors); 101337301a55STejun Heo 10141e999736SAlan Cox return sectors; 10151e999736SAlan Cox } 10161e999736SAlan Cox 1017c6fd2807SJeff Garzik static u64 ata_id_n_sectors(const u16 *id) 1018c6fd2807SJeff Garzik { 1019c6fd2807SJeff Garzik if (ata_id_has_lba(id)) { 1020c6fd2807SJeff Garzik if (ata_id_has_lba48(id)) 1021c6fd2807SJeff Garzik return ata_id_u64(id, 100); 1022c6fd2807SJeff Garzik else 1023c6fd2807SJeff Garzik return ata_id_u32(id, 60); 1024c6fd2807SJeff Garzik } else { 1025c6fd2807SJeff Garzik if (ata_id_current_chs_valid(id)) 1026c6fd2807SJeff Garzik return ata_id_u32(id, 57); 1027c6fd2807SJeff Garzik else 1028c6fd2807SJeff Garzik return id[1] * id[3] * id[6]; 1029c6fd2807SJeff Garzik } 1030c6fd2807SJeff Garzik } 1031c6fd2807SJeff Garzik 1032c6fd2807SJeff Garzik /** 103310305f0fSAlan * ata_id_to_dma_mode - Identify DMA mode from id block 103410305f0fSAlan * @dev: device to identify 1035cc261267SRandy Dunlap * @unknown: mode to assume if we cannot tell 103610305f0fSAlan * 103710305f0fSAlan * Set up the timing values for the device based upon the identify 103810305f0fSAlan * reported values for the DMA mode. This function is used by drivers 103910305f0fSAlan * which rely upon firmware configured modes, but wish to report the 104010305f0fSAlan * mode correctly when possible. 104110305f0fSAlan * 104210305f0fSAlan * In addition we emit similarly formatted messages to the default 104310305f0fSAlan * ata_dev_set_mode handler, in order to provide consistency of 104410305f0fSAlan * presentation. 104510305f0fSAlan */ 104610305f0fSAlan 104710305f0fSAlan void ata_id_to_dma_mode(struct ata_device *dev, u8 unknown) 104810305f0fSAlan { 104910305f0fSAlan unsigned int mask; 105010305f0fSAlan u8 mode; 105110305f0fSAlan 105210305f0fSAlan /* Pack the DMA modes */ 105310305f0fSAlan mask = ((dev->id[63] >> 8) << ATA_SHIFT_MWDMA) & ATA_MASK_MWDMA; 105410305f0fSAlan if (dev->id[53] & 0x04) 105510305f0fSAlan mask |= ((dev->id[88] >> 8) << ATA_SHIFT_UDMA) & ATA_MASK_UDMA; 105610305f0fSAlan 105710305f0fSAlan /* Select the mode in use */ 105810305f0fSAlan mode = ata_xfer_mask2mode(mask); 105910305f0fSAlan 106010305f0fSAlan if (mode != 0) { 106110305f0fSAlan ata_dev_printk(dev, KERN_INFO, "configured for %s\n", 106210305f0fSAlan ata_mode_string(mask)); 106310305f0fSAlan } else { 106410305f0fSAlan /* SWDMA perhaps ? */ 106510305f0fSAlan mode = unknown; 106610305f0fSAlan ata_dev_printk(dev, KERN_INFO, "configured for DMA\n"); 106710305f0fSAlan } 106810305f0fSAlan 106910305f0fSAlan /* Configure the device reporting */ 107010305f0fSAlan dev->xfer_mode = mode; 107110305f0fSAlan dev->xfer_shift = ata_xfer_mode2shift(mode); 107210305f0fSAlan } 107310305f0fSAlan 107410305f0fSAlan /** 1075c6fd2807SJeff Garzik * ata_noop_dev_select - Select device 0/1 on ATA bus 1076c6fd2807SJeff Garzik * @ap: ATA channel to manipulate 1077c6fd2807SJeff Garzik * @device: ATA device (numbered from zero) to select 1078c6fd2807SJeff Garzik * 1079c6fd2807SJeff Garzik * This function performs no actual function. 1080c6fd2807SJeff Garzik * 1081c6fd2807SJeff Garzik * May be used as the dev_select() entry in ata_port_operations. 1082c6fd2807SJeff Garzik * 1083c6fd2807SJeff Garzik * LOCKING: 1084c6fd2807SJeff Garzik * caller. 1085c6fd2807SJeff Garzik */ 1086c6fd2807SJeff Garzik void ata_noop_dev_select (struct ata_port *ap, unsigned int device) 1087c6fd2807SJeff Garzik { 1088c6fd2807SJeff Garzik } 1089c6fd2807SJeff Garzik 1090c6fd2807SJeff Garzik 1091c6fd2807SJeff Garzik /** 1092c6fd2807SJeff Garzik * ata_std_dev_select - Select device 0/1 on ATA bus 1093c6fd2807SJeff Garzik * @ap: ATA channel to manipulate 1094c6fd2807SJeff Garzik * @device: ATA device (numbered from zero) to select 1095c6fd2807SJeff Garzik * 1096c6fd2807SJeff Garzik * Use the method defined in the ATA specification to 1097c6fd2807SJeff Garzik * make either device 0, or device 1, active on the 1098c6fd2807SJeff Garzik * ATA channel. Works with both PIO and MMIO. 1099c6fd2807SJeff Garzik * 1100c6fd2807SJeff Garzik * May be used as the dev_select() entry in ata_port_operations. 1101c6fd2807SJeff Garzik * 1102c6fd2807SJeff Garzik * LOCKING: 1103c6fd2807SJeff Garzik * caller. 1104c6fd2807SJeff Garzik */ 1105c6fd2807SJeff Garzik 1106c6fd2807SJeff Garzik void ata_std_dev_select (struct ata_port *ap, unsigned int device) 1107c6fd2807SJeff Garzik { 1108c6fd2807SJeff Garzik u8 tmp; 1109c6fd2807SJeff Garzik 1110c6fd2807SJeff Garzik if (device == 0) 1111c6fd2807SJeff Garzik tmp = ATA_DEVICE_OBS; 1112c6fd2807SJeff Garzik else 1113c6fd2807SJeff Garzik tmp = ATA_DEVICE_OBS | ATA_DEV1; 1114c6fd2807SJeff Garzik 11150d5ff566STejun Heo iowrite8(tmp, ap->ioaddr.device_addr); 1116c6fd2807SJeff Garzik ata_pause(ap); /* needed; also flushes, for mmio */ 1117c6fd2807SJeff Garzik } 1118c6fd2807SJeff Garzik 1119c6fd2807SJeff Garzik /** 1120c6fd2807SJeff Garzik * ata_dev_select - Select device 0/1 on ATA bus 1121c6fd2807SJeff Garzik * @ap: ATA channel to manipulate 1122c6fd2807SJeff Garzik * @device: ATA device (numbered from zero) to select 1123c6fd2807SJeff Garzik * @wait: non-zero to wait for Status register BSY bit to clear 1124c6fd2807SJeff Garzik * @can_sleep: non-zero if context allows sleeping 1125c6fd2807SJeff Garzik * 1126c6fd2807SJeff Garzik * Use the method defined in the ATA specification to 1127c6fd2807SJeff Garzik * make either device 0, or device 1, active on the 1128c6fd2807SJeff Garzik * ATA channel. 1129c6fd2807SJeff Garzik * 1130c6fd2807SJeff Garzik * This is a high-level version of ata_std_dev_select(), 1131c6fd2807SJeff Garzik * which additionally provides the services of inserting 1132c6fd2807SJeff Garzik * the proper pauses and status polling, where needed. 1133c6fd2807SJeff Garzik * 1134c6fd2807SJeff Garzik * LOCKING: 1135c6fd2807SJeff Garzik * caller. 1136c6fd2807SJeff Garzik */ 1137c6fd2807SJeff Garzik 1138c6fd2807SJeff Garzik void ata_dev_select(struct ata_port *ap, unsigned int device, 1139c6fd2807SJeff Garzik unsigned int wait, unsigned int can_sleep) 1140c6fd2807SJeff Garzik { 1141c6fd2807SJeff Garzik if (ata_msg_probe(ap)) 114244877b4eSTejun Heo ata_port_printk(ap, KERN_INFO, "ata_dev_select: ENTER, " 114344877b4eSTejun Heo "device %u, wait %u\n", device, wait); 1144c6fd2807SJeff Garzik 1145c6fd2807SJeff Garzik if (wait) 1146c6fd2807SJeff Garzik ata_wait_idle(ap); 1147c6fd2807SJeff Garzik 1148c6fd2807SJeff Garzik ap->ops->dev_select(ap, device); 1149c6fd2807SJeff Garzik 1150c6fd2807SJeff Garzik if (wait) { 1151c6fd2807SJeff Garzik if (can_sleep && ap->device[device].class == ATA_DEV_ATAPI) 1152c6fd2807SJeff Garzik msleep(150); 1153c6fd2807SJeff Garzik ata_wait_idle(ap); 1154c6fd2807SJeff Garzik } 1155c6fd2807SJeff Garzik } 1156c6fd2807SJeff Garzik 1157c6fd2807SJeff Garzik /** 1158c6fd2807SJeff Garzik * ata_dump_id - IDENTIFY DEVICE info debugging output 1159c6fd2807SJeff Garzik * @id: IDENTIFY DEVICE page to dump 1160c6fd2807SJeff Garzik * 1161c6fd2807SJeff Garzik * Dump selected 16-bit words from the given IDENTIFY DEVICE 1162c6fd2807SJeff Garzik * page. 1163c6fd2807SJeff Garzik * 1164c6fd2807SJeff Garzik * LOCKING: 1165c6fd2807SJeff Garzik * caller. 1166c6fd2807SJeff Garzik */ 1167c6fd2807SJeff Garzik 1168c6fd2807SJeff Garzik static inline void ata_dump_id(const u16 *id) 1169c6fd2807SJeff Garzik { 1170c6fd2807SJeff Garzik DPRINTK("49==0x%04x " 1171c6fd2807SJeff Garzik "53==0x%04x " 1172c6fd2807SJeff Garzik "63==0x%04x " 1173c6fd2807SJeff Garzik "64==0x%04x " 1174c6fd2807SJeff Garzik "75==0x%04x \n", 1175c6fd2807SJeff Garzik id[49], 1176c6fd2807SJeff Garzik id[53], 1177c6fd2807SJeff Garzik id[63], 1178c6fd2807SJeff Garzik id[64], 1179c6fd2807SJeff Garzik id[75]); 1180c6fd2807SJeff Garzik DPRINTK("80==0x%04x " 1181c6fd2807SJeff Garzik "81==0x%04x " 1182c6fd2807SJeff Garzik "82==0x%04x " 1183c6fd2807SJeff Garzik "83==0x%04x " 1184c6fd2807SJeff Garzik "84==0x%04x \n", 1185c6fd2807SJeff Garzik id[80], 1186c6fd2807SJeff Garzik id[81], 1187c6fd2807SJeff Garzik id[82], 1188c6fd2807SJeff Garzik id[83], 1189c6fd2807SJeff Garzik id[84]); 1190c6fd2807SJeff Garzik DPRINTK("88==0x%04x " 1191c6fd2807SJeff Garzik "93==0x%04x\n", 1192c6fd2807SJeff Garzik id[88], 1193c6fd2807SJeff Garzik id[93]); 1194c6fd2807SJeff Garzik } 1195c6fd2807SJeff Garzik 1196c6fd2807SJeff Garzik /** 1197c6fd2807SJeff Garzik * ata_id_xfermask - Compute xfermask from the given IDENTIFY data 1198c6fd2807SJeff Garzik * @id: IDENTIFY data to compute xfer mask from 1199c6fd2807SJeff Garzik * 1200c6fd2807SJeff Garzik * Compute the xfermask for this device. This is not as trivial 1201c6fd2807SJeff Garzik * as it seems if we must consider early devices correctly. 1202c6fd2807SJeff Garzik * 1203c6fd2807SJeff Garzik * FIXME: pre IDE drive timing (do we care ?). 1204c6fd2807SJeff Garzik * 1205c6fd2807SJeff Garzik * LOCKING: 1206c6fd2807SJeff Garzik * None. 1207c6fd2807SJeff Garzik * 1208c6fd2807SJeff Garzik * RETURNS: 1209c6fd2807SJeff Garzik * Computed xfermask 1210c6fd2807SJeff Garzik */ 1211c6fd2807SJeff Garzik static unsigned int ata_id_xfermask(const u16 *id) 1212c6fd2807SJeff Garzik { 1213c6fd2807SJeff Garzik unsigned int pio_mask, mwdma_mask, udma_mask; 1214c6fd2807SJeff Garzik 1215c6fd2807SJeff Garzik /* Usual case. Word 53 indicates word 64 is valid */ 1216c6fd2807SJeff Garzik if (id[ATA_ID_FIELD_VALID] & (1 << 1)) { 1217c6fd2807SJeff Garzik pio_mask = id[ATA_ID_PIO_MODES] & 0x03; 1218c6fd2807SJeff Garzik pio_mask <<= 3; 1219c6fd2807SJeff Garzik pio_mask |= 0x7; 1220c6fd2807SJeff Garzik } else { 1221c6fd2807SJeff Garzik /* If word 64 isn't valid then Word 51 high byte holds 1222c6fd2807SJeff Garzik * the PIO timing number for the maximum. Turn it into 1223c6fd2807SJeff Garzik * a mask. 1224c6fd2807SJeff Garzik */ 12257a0f1c8aSLennert Buytenhek u8 mode = (id[ATA_ID_OLD_PIO_MODES] >> 8) & 0xFF; 122646767aebSAlan Cox if (mode < 5) /* Valid PIO range */ 122746767aebSAlan Cox pio_mask = (2 << mode) - 1; 122846767aebSAlan Cox else 122946767aebSAlan Cox pio_mask = 1; 1230c6fd2807SJeff Garzik 1231c6fd2807SJeff Garzik /* But wait.. there's more. Design your standards by 1232c6fd2807SJeff Garzik * committee and you too can get a free iordy field to 1233c6fd2807SJeff Garzik * process. However its the speeds not the modes that 1234c6fd2807SJeff Garzik * are supported... Note drivers using the timing API 1235c6fd2807SJeff Garzik * will get this right anyway 1236c6fd2807SJeff Garzik */ 1237c6fd2807SJeff Garzik } 1238c6fd2807SJeff Garzik 1239c6fd2807SJeff Garzik mwdma_mask = id[ATA_ID_MWDMA_MODES] & 0x07; 1240c6fd2807SJeff Garzik 1241b352e57dSAlan Cox if (ata_id_is_cfa(id)) { 1242b352e57dSAlan Cox /* 1243b352e57dSAlan Cox * Process compact flash extended modes 1244b352e57dSAlan Cox */ 1245b352e57dSAlan Cox int pio = id[163] & 0x7; 1246b352e57dSAlan Cox int dma = (id[163] >> 3) & 7; 1247b352e57dSAlan Cox 1248b352e57dSAlan Cox if (pio) 1249b352e57dSAlan Cox pio_mask |= (1 << 5); 1250b352e57dSAlan Cox if (pio > 1) 1251b352e57dSAlan Cox pio_mask |= (1 << 6); 1252b352e57dSAlan Cox if (dma) 1253b352e57dSAlan Cox mwdma_mask |= (1 << 3); 1254b352e57dSAlan Cox if (dma > 1) 1255b352e57dSAlan Cox mwdma_mask |= (1 << 4); 1256b352e57dSAlan Cox } 1257b352e57dSAlan Cox 1258c6fd2807SJeff Garzik udma_mask = 0; 1259c6fd2807SJeff Garzik if (id[ATA_ID_FIELD_VALID] & (1 << 2)) 1260c6fd2807SJeff Garzik udma_mask = id[ATA_ID_UDMA_MODES] & 0xff; 1261c6fd2807SJeff Garzik 1262c6fd2807SJeff Garzik return ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask); 1263c6fd2807SJeff Garzik } 1264c6fd2807SJeff Garzik 1265c6fd2807SJeff Garzik /** 1266c6fd2807SJeff Garzik * ata_port_queue_task - Queue port_task 1267c6fd2807SJeff Garzik * @ap: The ata_port to queue port_task for 1268c6fd2807SJeff Garzik * @fn: workqueue function to be scheduled 126965f27f38SDavid Howells * @data: data for @fn to use 1270c6fd2807SJeff Garzik * @delay: delay time for workqueue function 1271c6fd2807SJeff Garzik * 1272c6fd2807SJeff Garzik * Schedule @fn(@data) for execution after @delay jiffies using 1273c6fd2807SJeff Garzik * port_task. There is one port_task per port and it's the 1274c6fd2807SJeff Garzik * user(low level driver)'s responsibility to make sure that only 1275c6fd2807SJeff Garzik * one task is active at any given time. 1276c6fd2807SJeff Garzik * 1277c6fd2807SJeff Garzik * libata core layer takes care of synchronization between 1278c6fd2807SJeff Garzik * port_task and EH. ata_port_queue_task() may be ignored for EH 1279c6fd2807SJeff Garzik * synchronization. 1280c6fd2807SJeff Garzik * 1281c6fd2807SJeff Garzik * LOCKING: 1282c6fd2807SJeff Garzik * Inherited from caller. 1283c6fd2807SJeff Garzik */ 128465f27f38SDavid Howells void ata_port_queue_task(struct ata_port *ap, work_func_t fn, void *data, 1285c6fd2807SJeff Garzik unsigned long delay) 1286c6fd2807SJeff Garzik { 128765f27f38SDavid Howells PREPARE_DELAYED_WORK(&ap->port_task, fn); 128865f27f38SDavid Howells ap->port_task_data = data; 1289c6fd2807SJeff Garzik 129045a66c1cSOleg Nesterov /* may fail if ata_port_flush_task() in progress */ 129145a66c1cSOleg Nesterov queue_delayed_work(ata_wq, &ap->port_task, delay); 1292c6fd2807SJeff Garzik } 1293c6fd2807SJeff Garzik 1294c6fd2807SJeff Garzik /** 1295c6fd2807SJeff Garzik * ata_port_flush_task - Flush port_task 1296c6fd2807SJeff Garzik * @ap: The ata_port to flush port_task for 1297c6fd2807SJeff Garzik * 1298c6fd2807SJeff Garzik * After this function completes, port_task is guranteed not to 1299c6fd2807SJeff Garzik * be running or scheduled. 1300c6fd2807SJeff Garzik * 1301c6fd2807SJeff Garzik * LOCKING: 1302c6fd2807SJeff Garzik * Kernel thread context (may sleep) 1303c6fd2807SJeff Garzik */ 1304c6fd2807SJeff Garzik void ata_port_flush_task(struct ata_port *ap) 1305c6fd2807SJeff Garzik { 1306c6fd2807SJeff Garzik DPRINTK("ENTER\n"); 1307c6fd2807SJeff Garzik 130845a66c1cSOleg Nesterov cancel_rearming_delayed_work(&ap->port_task); 1309c6fd2807SJeff Garzik 1310c6fd2807SJeff Garzik if (ata_msg_ctl(ap)) 1311c6fd2807SJeff Garzik ata_port_printk(ap, KERN_DEBUG, "%s: EXIT\n", __FUNCTION__); 1312c6fd2807SJeff Garzik } 1313c6fd2807SJeff Garzik 13147102d230SAdrian Bunk static void ata_qc_complete_internal(struct ata_queued_cmd *qc) 1315c6fd2807SJeff Garzik { 1316c6fd2807SJeff Garzik struct completion *waiting = qc->private_data; 1317c6fd2807SJeff Garzik 1318c6fd2807SJeff Garzik complete(waiting); 1319c6fd2807SJeff Garzik } 1320c6fd2807SJeff Garzik 1321c6fd2807SJeff Garzik /** 13222432697bSTejun Heo * ata_exec_internal_sg - execute libata internal command 1323c6fd2807SJeff Garzik * @dev: Device to which the command is sent 1324c6fd2807SJeff Garzik * @tf: Taskfile registers for the command and the result 1325c6fd2807SJeff Garzik * @cdb: CDB for packet command 1326c6fd2807SJeff Garzik * @dma_dir: Data tranfer direction of the command 13272432697bSTejun Heo * @sg: sg list for the data buffer of the command 13282432697bSTejun Heo * @n_elem: Number of sg entries 1329c6fd2807SJeff Garzik * 1330c6fd2807SJeff Garzik * Executes libata internal command with timeout. @tf contains 1331c6fd2807SJeff Garzik * command on entry and result on return. Timeout and error 1332c6fd2807SJeff Garzik * conditions are reported via return value. No recovery action 1333c6fd2807SJeff Garzik * is taken after a command times out. It's caller's duty to 1334c6fd2807SJeff Garzik * clean up after timeout. 1335c6fd2807SJeff Garzik * 1336c6fd2807SJeff Garzik * LOCKING: 1337c6fd2807SJeff Garzik * None. Should be called with kernel context, might sleep. 1338c6fd2807SJeff Garzik * 1339c6fd2807SJeff Garzik * RETURNS: 1340c6fd2807SJeff Garzik * Zero on success, AC_ERR_* mask on failure 1341c6fd2807SJeff Garzik */ 13422432697bSTejun Heo unsigned ata_exec_internal_sg(struct ata_device *dev, 1343c6fd2807SJeff Garzik struct ata_taskfile *tf, const u8 *cdb, 13442432697bSTejun Heo int dma_dir, struct scatterlist *sg, 13452432697bSTejun Heo unsigned int n_elem) 1346c6fd2807SJeff Garzik { 1347c6fd2807SJeff Garzik struct ata_port *ap = dev->ap; 1348c6fd2807SJeff Garzik u8 command = tf->command; 1349c6fd2807SJeff Garzik struct ata_queued_cmd *qc; 1350c6fd2807SJeff Garzik unsigned int tag, preempted_tag; 1351c6fd2807SJeff Garzik u32 preempted_sactive, preempted_qc_active; 1352c6fd2807SJeff Garzik DECLARE_COMPLETION_ONSTACK(wait); 1353c6fd2807SJeff Garzik unsigned long flags; 1354c6fd2807SJeff Garzik unsigned int err_mask; 1355c6fd2807SJeff Garzik int rc; 1356c6fd2807SJeff Garzik 1357c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 1358c6fd2807SJeff Garzik 1359c6fd2807SJeff Garzik /* no internal command while frozen */ 1360c6fd2807SJeff Garzik if (ap->pflags & ATA_PFLAG_FROZEN) { 1361c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 1362c6fd2807SJeff Garzik return AC_ERR_SYSTEM; 1363c6fd2807SJeff Garzik } 1364c6fd2807SJeff Garzik 1365c6fd2807SJeff Garzik /* initialize internal qc */ 1366c6fd2807SJeff Garzik 1367c6fd2807SJeff Garzik /* XXX: Tag 0 is used for drivers with legacy EH as some 1368c6fd2807SJeff Garzik * drivers choke if any other tag is given. This breaks 1369c6fd2807SJeff Garzik * ata_tag_internal() test for those drivers. Don't use new 1370c6fd2807SJeff Garzik * EH stuff without converting to it. 1371c6fd2807SJeff Garzik */ 1372c6fd2807SJeff Garzik if (ap->ops->error_handler) 1373c6fd2807SJeff Garzik tag = ATA_TAG_INTERNAL; 1374c6fd2807SJeff Garzik else 1375c6fd2807SJeff Garzik tag = 0; 1376c6fd2807SJeff Garzik 1377c6fd2807SJeff Garzik if (test_and_set_bit(tag, &ap->qc_allocated)) 1378c6fd2807SJeff Garzik BUG(); 1379c6fd2807SJeff Garzik qc = __ata_qc_from_tag(ap, tag); 1380c6fd2807SJeff Garzik 1381c6fd2807SJeff Garzik qc->tag = tag; 1382c6fd2807SJeff Garzik qc->scsicmd = NULL; 1383c6fd2807SJeff Garzik qc->ap = ap; 1384c6fd2807SJeff Garzik qc->dev = dev; 1385c6fd2807SJeff Garzik ata_qc_reinit(qc); 1386c6fd2807SJeff Garzik 1387c6fd2807SJeff Garzik preempted_tag = ap->active_tag; 1388c6fd2807SJeff Garzik preempted_sactive = ap->sactive; 1389c6fd2807SJeff Garzik preempted_qc_active = ap->qc_active; 1390c6fd2807SJeff Garzik ap->active_tag = ATA_TAG_POISON; 1391c6fd2807SJeff Garzik ap->sactive = 0; 1392c6fd2807SJeff Garzik ap->qc_active = 0; 1393c6fd2807SJeff Garzik 1394c6fd2807SJeff Garzik /* prepare & issue qc */ 1395c6fd2807SJeff Garzik qc->tf = *tf; 1396c6fd2807SJeff Garzik if (cdb) 1397c6fd2807SJeff Garzik memcpy(qc->cdb, cdb, ATAPI_CDB_LEN); 1398c6fd2807SJeff Garzik qc->flags |= ATA_QCFLAG_RESULT_TF; 1399c6fd2807SJeff Garzik qc->dma_dir = dma_dir; 1400c6fd2807SJeff Garzik if (dma_dir != DMA_NONE) { 14012432697bSTejun Heo unsigned int i, buflen = 0; 14022432697bSTejun Heo 14032432697bSTejun Heo for (i = 0; i < n_elem; i++) 14042432697bSTejun Heo buflen += sg[i].length; 14052432697bSTejun Heo 14062432697bSTejun Heo ata_sg_init(qc, sg, n_elem); 140749c80429SBrian King qc->nbytes = buflen; 1408c6fd2807SJeff Garzik } 1409c6fd2807SJeff Garzik 1410c6fd2807SJeff Garzik qc->private_data = &wait; 1411c6fd2807SJeff Garzik qc->complete_fn = ata_qc_complete_internal; 1412c6fd2807SJeff Garzik 1413c6fd2807SJeff Garzik ata_qc_issue(qc); 1414c6fd2807SJeff Garzik 1415c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 1416c6fd2807SJeff Garzik 1417c6fd2807SJeff Garzik rc = wait_for_completion_timeout(&wait, ata_probe_timeout); 1418c6fd2807SJeff Garzik 1419c6fd2807SJeff Garzik ata_port_flush_task(ap); 1420c6fd2807SJeff Garzik 1421c6fd2807SJeff Garzik if (!rc) { 1422c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 1423c6fd2807SJeff Garzik 1424c6fd2807SJeff Garzik /* We're racing with irq here. If we lose, the 1425c6fd2807SJeff Garzik * following test prevents us from completing the qc 1426c6fd2807SJeff Garzik * twice. If we win, the port is frozen and will be 1427c6fd2807SJeff Garzik * cleaned up by ->post_internal_cmd(). 1428c6fd2807SJeff Garzik */ 1429c6fd2807SJeff Garzik if (qc->flags & ATA_QCFLAG_ACTIVE) { 1430c6fd2807SJeff Garzik qc->err_mask |= AC_ERR_TIMEOUT; 1431c6fd2807SJeff Garzik 1432c6fd2807SJeff Garzik if (ap->ops->error_handler) 1433c6fd2807SJeff Garzik ata_port_freeze(ap); 1434c6fd2807SJeff Garzik else 1435c6fd2807SJeff Garzik ata_qc_complete(qc); 1436c6fd2807SJeff Garzik 1437c6fd2807SJeff Garzik if (ata_msg_warn(ap)) 1438c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_WARNING, 1439c6fd2807SJeff Garzik "qc timeout (cmd 0x%x)\n", command); 1440c6fd2807SJeff Garzik } 1441c6fd2807SJeff Garzik 1442c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 1443c6fd2807SJeff Garzik } 1444c6fd2807SJeff Garzik 1445c6fd2807SJeff Garzik /* do post_internal_cmd */ 1446c6fd2807SJeff Garzik if (ap->ops->post_internal_cmd) 1447c6fd2807SJeff Garzik ap->ops->post_internal_cmd(qc); 1448c6fd2807SJeff Garzik 1449a51d644aSTejun Heo /* perform minimal error analysis */ 1450a51d644aSTejun Heo if (qc->flags & ATA_QCFLAG_FAILED) { 1451a51d644aSTejun Heo if (qc->result_tf.command & (ATA_ERR | ATA_DF)) 1452a51d644aSTejun Heo qc->err_mask |= AC_ERR_DEV; 1453a51d644aSTejun Heo 1454a51d644aSTejun Heo if (!qc->err_mask) 1455c6fd2807SJeff Garzik qc->err_mask |= AC_ERR_OTHER; 1456a51d644aSTejun Heo 1457a51d644aSTejun Heo if (qc->err_mask & ~AC_ERR_OTHER) 1458a51d644aSTejun Heo qc->err_mask &= ~AC_ERR_OTHER; 1459c6fd2807SJeff Garzik } 1460c6fd2807SJeff Garzik 1461c6fd2807SJeff Garzik /* finish up */ 1462c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 1463c6fd2807SJeff Garzik 1464c6fd2807SJeff Garzik *tf = qc->result_tf; 1465c6fd2807SJeff Garzik err_mask = qc->err_mask; 1466c6fd2807SJeff Garzik 1467c6fd2807SJeff Garzik ata_qc_free(qc); 1468c6fd2807SJeff Garzik ap->active_tag = preempted_tag; 1469c6fd2807SJeff Garzik ap->sactive = preempted_sactive; 1470c6fd2807SJeff Garzik ap->qc_active = preempted_qc_active; 1471c6fd2807SJeff Garzik 1472c6fd2807SJeff Garzik /* XXX - Some LLDDs (sata_mv) disable port on command failure. 1473c6fd2807SJeff Garzik * Until those drivers are fixed, we detect the condition 1474c6fd2807SJeff Garzik * here, fail the command with AC_ERR_SYSTEM and reenable the 1475c6fd2807SJeff Garzik * port. 1476c6fd2807SJeff Garzik * 1477c6fd2807SJeff Garzik * Note that this doesn't change any behavior as internal 1478c6fd2807SJeff Garzik * command failure results in disabling the device in the 1479c6fd2807SJeff Garzik * higher layer for LLDDs without new reset/EH callbacks. 1480c6fd2807SJeff Garzik * 1481c6fd2807SJeff Garzik * Kill the following code as soon as those drivers are fixed. 1482c6fd2807SJeff Garzik */ 1483c6fd2807SJeff Garzik if (ap->flags & ATA_FLAG_DISABLED) { 1484c6fd2807SJeff Garzik err_mask |= AC_ERR_SYSTEM; 1485c6fd2807SJeff Garzik ata_port_probe(ap); 1486c6fd2807SJeff Garzik } 1487c6fd2807SJeff Garzik 1488c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 1489c6fd2807SJeff Garzik 1490c6fd2807SJeff Garzik return err_mask; 1491c6fd2807SJeff Garzik } 1492c6fd2807SJeff Garzik 1493c6fd2807SJeff Garzik /** 149433480a0eSTejun Heo * ata_exec_internal - execute libata internal command 14952432697bSTejun Heo * @dev: Device to which the command is sent 14962432697bSTejun Heo * @tf: Taskfile registers for the command and the result 14972432697bSTejun Heo * @cdb: CDB for packet command 14982432697bSTejun Heo * @dma_dir: Data tranfer direction of the command 14992432697bSTejun Heo * @buf: Data buffer of the command 15002432697bSTejun Heo * @buflen: Length of data buffer 15012432697bSTejun Heo * 15022432697bSTejun Heo * Wrapper around ata_exec_internal_sg() which takes simple 15032432697bSTejun Heo * buffer instead of sg list. 15042432697bSTejun Heo * 15052432697bSTejun Heo * LOCKING: 15062432697bSTejun Heo * None. Should be called with kernel context, might sleep. 15072432697bSTejun Heo * 15082432697bSTejun Heo * RETURNS: 15092432697bSTejun Heo * Zero on success, AC_ERR_* mask on failure 15102432697bSTejun Heo */ 15112432697bSTejun Heo unsigned ata_exec_internal(struct ata_device *dev, 15122432697bSTejun Heo struct ata_taskfile *tf, const u8 *cdb, 15132432697bSTejun Heo int dma_dir, void *buf, unsigned int buflen) 15142432697bSTejun Heo { 151533480a0eSTejun Heo struct scatterlist *psg = NULL, sg; 151633480a0eSTejun Heo unsigned int n_elem = 0; 15172432697bSTejun Heo 151833480a0eSTejun Heo if (dma_dir != DMA_NONE) { 151933480a0eSTejun Heo WARN_ON(!buf); 15202432697bSTejun Heo sg_init_one(&sg, buf, buflen); 152133480a0eSTejun Heo psg = &sg; 152233480a0eSTejun Heo n_elem++; 152333480a0eSTejun Heo } 15242432697bSTejun Heo 152533480a0eSTejun Heo return ata_exec_internal_sg(dev, tf, cdb, dma_dir, psg, n_elem); 15262432697bSTejun Heo } 15272432697bSTejun Heo 15282432697bSTejun Heo /** 1529c6fd2807SJeff Garzik * ata_do_simple_cmd - execute simple internal command 1530c6fd2807SJeff Garzik * @dev: Device to which the command is sent 1531c6fd2807SJeff Garzik * @cmd: Opcode to execute 1532c6fd2807SJeff Garzik * 1533c6fd2807SJeff Garzik * Execute a 'simple' command, that only consists of the opcode 1534c6fd2807SJeff Garzik * 'cmd' itself, without filling any other registers 1535c6fd2807SJeff Garzik * 1536c6fd2807SJeff Garzik * LOCKING: 1537c6fd2807SJeff Garzik * Kernel thread context (may sleep). 1538c6fd2807SJeff Garzik * 1539c6fd2807SJeff Garzik * RETURNS: 1540c6fd2807SJeff Garzik * Zero on success, AC_ERR_* mask on failure 1541c6fd2807SJeff Garzik */ 1542c6fd2807SJeff Garzik unsigned int ata_do_simple_cmd(struct ata_device *dev, u8 cmd) 1543c6fd2807SJeff Garzik { 1544c6fd2807SJeff Garzik struct ata_taskfile tf; 1545c6fd2807SJeff Garzik 1546c6fd2807SJeff Garzik ata_tf_init(dev, &tf); 1547c6fd2807SJeff Garzik 1548c6fd2807SJeff Garzik tf.command = cmd; 1549c6fd2807SJeff Garzik tf.flags |= ATA_TFLAG_DEVICE; 1550c6fd2807SJeff Garzik tf.protocol = ATA_PROT_NODATA; 1551c6fd2807SJeff Garzik 1552c6fd2807SJeff Garzik return ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0); 1553c6fd2807SJeff Garzik } 1554c6fd2807SJeff Garzik 1555c6fd2807SJeff Garzik /** 1556c6fd2807SJeff Garzik * ata_pio_need_iordy - check if iordy needed 1557c6fd2807SJeff Garzik * @adev: ATA device 1558c6fd2807SJeff Garzik * 1559c6fd2807SJeff Garzik * Check if the current speed of the device requires IORDY. Used 1560c6fd2807SJeff Garzik * by various controllers for chip configuration. 1561c6fd2807SJeff Garzik */ 1562c6fd2807SJeff Garzik 1563c6fd2807SJeff Garzik unsigned int ata_pio_need_iordy(const struct ata_device *adev) 1564c6fd2807SJeff Garzik { 1565432729f0SAlan Cox /* Controller doesn't support IORDY. Probably a pointless check 1566432729f0SAlan Cox as the caller should know this */ 1567432729f0SAlan Cox if (adev->ap->flags & ATA_FLAG_NO_IORDY) 1568c6fd2807SJeff Garzik return 0; 1569432729f0SAlan Cox /* PIO3 and higher it is mandatory */ 1570432729f0SAlan Cox if (adev->pio_mode > XFER_PIO_2) 1571c6fd2807SJeff Garzik return 1; 1572432729f0SAlan Cox /* We turn it on when possible */ 1573432729f0SAlan Cox if (ata_id_has_iordy(adev->id)) 1574432729f0SAlan Cox return 1; 1575432729f0SAlan Cox return 0; 1576432729f0SAlan Cox } 1577c6fd2807SJeff Garzik 1578432729f0SAlan Cox /** 1579432729f0SAlan Cox * ata_pio_mask_no_iordy - Return the non IORDY mask 1580432729f0SAlan Cox * @adev: ATA device 1581432729f0SAlan Cox * 1582432729f0SAlan Cox * Compute the highest mode possible if we are not using iordy. Return 1583432729f0SAlan Cox * -1 if no iordy mode is available. 1584432729f0SAlan Cox */ 1585432729f0SAlan Cox 1586432729f0SAlan Cox static u32 ata_pio_mask_no_iordy(const struct ata_device *adev) 1587432729f0SAlan Cox { 1588c6fd2807SJeff Garzik /* If we have no drive specific rule, then PIO 2 is non IORDY */ 1589c6fd2807SJeff Garzik if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE */ 1590432729f0SAlan Cox u16 pio = adev->id[ATA_ID_EIDE_PIO]; 1591c6fd2807SJeff Garzik /* Is the speed faster than the drive allows non IORDY ? */ 1592c6fd2807SJeff Garzik if (pio) { 1593c6fd2807SJeff Garzik /* This is cycle times not frequency - watch the logic! */ 1594c6fd2807SJeff Garzik if (pio > 240) /* PIO2 is 240nS per cycle */ 1595432729f0SAlan Cox return 3 << ATA_SHIFT_PIO; 1596432729f0SAlan Cox return 7 << ATA_SHIFT_PIO; 1597c6fd2807SJeff Garzik } 1598c6fd2807SJeff Garzik } 1599432729f0SAlan Cox return 3 << ATA_SHIFT_PIO; 1600c6fd2807SJeff Garzik } 1601c6fd2807SJeff Garzik 1602c6fd2807SJeff Garzik /** 1603c6fd2807SJeff Garzik * ata_dev_read_id - Read ID data from the specified device 1604c6fd2807SJeff Garzik * @dev: target device 1605c6fd2807SJeff Garzik * @p_class: pointer to class of the target device (may be changed) 1606bff04647STejun Heo * @flags: ATA_READID_* flags 1607c6fd2807SJeff Garzik * @id: buffer to read IDENTIFY data into 1608c6fd2807SJeff Garzik * 1609c6fd2807SJeff Garzik * Read ID data from the specified device. ATA_CMD_ID_ATA is 1610c6fd2807SJeff Garzik * performed on ATA devices and ATA_CMD_ID_ATAPI on ATAPI 1611c6fd2807SJeff Garzik * devices. This function also issues ATA_CMD_INIT_DEV_PARAMS 1612c6fd2807SJeff Garzik * for pre-ATA4 drives. 1613c6fd2807SJeff Garzik * 1614c6fd2807SJeff Garzik * LOCKING: 1615c6fd2807SJeff Garzik * Kernel thread context (may sleep) 1616c6fd2807SJeff Garzik * 1617c6fd2807SJeff Garzik * RETURNS: 1618c6fd2807SJeff Garzik * 0 on success, -errno otherwise. 1619c6fd2807SJeff Garzik */ 1620c6fd2807SJeff Garzik int ata_dev_read_id(struct ata_device *dev, unsigned int *p_class, 1621bff04647STejun Heo unsigned int flags, u16 *id) 1622c6fd2807SJeff Garzik { 1623c6fd2807SJeff Garzik struct ata_port *ap = dev->ap; 1624c6fd2807SJeff Garzik unsigned int class = *p_class; 1625c6fd2807SJeff Garzik struct ata_taskfile tf; 1626c6fd2807SJeff Garzik unsigned int err_mask = 0; 1627c6fd2807SJeff Garzik const char *reason; 162854936f8bSTejun Heo int may_fallback = 1, tried_spinup = 0; 1629c6fd2807SJeff Garzik int rc; 1630c6fd2807SJeff Garzik 1631c6fd2807SJeff Garzik if (ata_msg_ctl(ap)) 163244877b4eSTejun Heo ata_dev_printk(dev, KERN_DEBUG, "%s: ENTER\n", __FUNCTION__); 1633c6fd2807SJeff Garzik 1634c6fd2807SJeff Garzik ata_dev_select(ap, dev->devno, 1, 1); /* select device 0/1 */ 1635c6fd2807SJeff Garzik retry: 1636c6fd2807SJeff Garzik ata_tf_init(dev, &tf); 1637c6fd2807SJeff Garzik 1638c6fd2807SJeff Garzik switch (class) { 1639c6fd2807SJeff Garzik case ATA_DEV_ATA: 1640c6fd2807SJeff Garzik tf.command = ATA_CMD_ID_ATA; 1641c6fd2807SJeff Garzik break; 1642c6fd2807SJeff Garzik case ATA_DEV_ATAPI: 1643c6fd2807SJeff Garzik tf.command = ATA_CMD_ID_ATAPI; 1644c6fd2807SJeff Garzik break; 1645c6fd2807SJeff Garzik default: 1646c6fd2807SJeff Garzik rc = -ENODEV; 1647c6fd2807SJeff Garzik reason = "unsupported class"; 1648c6fd2807SJeff Garzik goto err_out; 1649c6fd2807SJeff Garzik } 1650c6fd2807SJeff Garzik 1651c6fd2807SJeff Garzik tf.protocol = ATA_PROT_PIO; 165281afe893STejun Heo 165381afe893STejun Heo /* Some devices choke if TF registers contain garbage. Make 165481afe893STejun Heo * sure those are properly initialized. 165581afe893STejun Heo */ 165681afe893STejun Heo tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 165781afe893STejun Heo 165881afe893STejun Heo /* Device presence detection is unreliable on some 165981afe893STejun Heo * controllers. Always poll IDENTIFY if available. 166081afe893STejun Heo */ 166181afe893STejun Heo tf.flags |= ATA_TFLAG_POLLING; 1662c6fd2807SJeff Garzik 1663c6fd2807SJeff Garzik err_mask = ata_exec_internal(dev, &tf, NULL, DMA_FROM_DEVICE, 1664c6fd2807SJeff Garzik id, sizeof(id[0]) * ATA_ID_WORDS); 1665c6fd2807SJeff Garzik if (err_mask) { 1666800b3996STejun Heo if (err_mask & AC_ERR_NODEV_HINT) { 166755a8e2c8STejun Heo DPRINTK("ata%u.%d: NODEV after polling detection\n", 166844877b4eSTejun Heo ap->print_id, dev->devno); 166955a8e2c8STejun Heo return -ENOENT; 167055a8e2c8STejun Heo } 167155a8e2c8STejun Heo 167254936f8bSTejun Heo /* Device or controller might have reported the wrong 167354936f8bSTejun Heo * device class. Give a shot at the other IDENTIFY if 167454936f8bSTejun Heo * the current one is aborted by the device. 167554936f8bSTejun Heo */ 167654936f8bSTejun Heo if (may_fallback && 167754936f8bSTejun Heo (err_mask == AC_ERR_DEV) && (tf.feature & ATA_ABORTED)) { 167854936f8bSTejun Heo may_fallback = 0; 167954936f8bSTejun Heo 168054936f8bSTejun Heo if (class == ATA_DEV_ATA) 168154936f8bSTejun Heo class = ATA_DEV_ATAPI; 168254936f8bSTejun Heo else 168354936f8bSTejun Heo class = ATA_DEV_ATA; 168454936f8bSTejun Heo goto retry; 168554936f8bSTejun Heo } 168654936f8bSTejun Heo 1687c6fd2807SJeff Garzik rc = -EIO; 1688c6fd2807SJeff Garzik reason = "I/O error"; 1689c6fd2807SJeff Garzik goto err_out; 1690c6fd2807SJeff Garzik } 1691c6fd2807SJeff Garzik 169254936f8bSTejun Heo /* Falling back doesn't make sense if ID data was read 169354936f8bSTejun Heo * successfully at least once. 169454936f8bSTejun Heo */ 169554936f8bSTejun Heo may_fallback = 0; 169654936f8bSTejun Heo 1697c6fd2807SJeff Garzik swap_buf_le16(id, ATA_ID_WORDS); 1698c6fd2807SJeff Garzik 1699c6fd2807SJeff Garzik /* sanity check */ 1700c6fd2807SJeff Garzik rc = -EINVAL; 17016070068bSAlan Cox reason = "device reports invalid type"; 17024a3381feSJeff Garzik 17034a3381feSJeff Garzik if (class == ATA_DEV_ATA) { 17044a3381feSJeff Garzik if (!ata_id_is_ata(id) && !ata_id_is_cfa(id)) 17054a3381feSJeff Garzik goto err_out; 17064a3381feSJeff Garzik } else { 17074a3381feSJeff Garzik if (ata_id_is_ata(id)) 1708c6fd2807SJeff Garzik goto err_out; 1709c6fd2807SJeff Garzik } 1710c6fd2807SJeff Garzik 1711169439c2SMark Lord if (!tried_spinup && (id[2] == 0x37c8 || id[2] == 0x738c)) { 1712169439c2SMark Lord tried_spinup = 1; 1713169439c2SMark Lord /* 1714169439c2SMark Lord * Drive powered-up in standby mode, and requires a specific 1715169439c2SMark Lord * SET_FEATURES spin-up subcommand before it will accept 1716169439c2SMark Lord * anything other than the original IDENTIFY command. 1717169439c2SMark Lord */ 1718169439c2SMark Lord ata_tf_init(dev, &tf); 1719169439c2SMark Lord tf.command = ATA_CMD_SET_FEATURES; 1720169439c2SMark Lord tf.feature = SETFEATURES_SPINUP; 1721169439c2SMark Lord tf.protocol = ATA_PROT_NODATA; 1722169439c2SMark Lord tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 1723169439c2SMark Lord err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0); 1724169439c2SMark Lord if (err_mask) { 1725169439c2SMark Lord rc = -EIO; 1726169439c2SMark Lord reason = "SPINUP failed"; 1727169439c2SMark Lord goto err_out; 1728169439c2SMark Lord } 1729169439c2SMark Lord /* 1730169439c2SMark Lord * If the drive initially returned incomplete IDENTIFY info, 1731169439c2SMark Lord * we now must reissue the IDENTIFY command. 1732169439c2SMark Lord */ 1733169439c2SMark Lord if (id[2] == 0x37c8) 1734169439c2SMark Lord goto retry; 1735169439c2SMark Lord } 1736169439c2SMark Lord 1737bff04647STejun Heo if ((flags & ATA_READID_POSTRESET) && class == ATA_DEV_ATA) { 1738c6fd2807SJeff Garzik /* 1739c6fd2807SJeff Garzik * The exact sequence expected by certain pre-ATA4 drives is: 1740c6fd2807SJeff Garzik * SRST RESET 1741c6fd2807SJeff Garzik * IDENTIFY 1742c6fd2807SJeff Garzik * INITIALIZE DEVICE PARAMETERS 1743c6fd2807SJeff Garzik * anything else.. 1744c6fd2807SJeff Garzik * Some drives were very specific about that exact sequence. 1745c6fd2807SJeff Garzik */ 1746c6fd2807SJeff Garzik if (ata_id_major_version(id) < 4 || !ata_id_has_lba(id)) { 1747c6fd2807SJeff Garzik err_mask = ata_dev_init_params(dev, id[3], id[6]); 1748c6fd2807SJeff Garzik if (err_mask) { 1749c6fd2807SJeff Garzik rc = -EIO; 1750c6fd2807SJeff Garzik reason = "INIT_DEV_PARAMS failed"; 1751c6fd2807SJeff Garzik goto err_out; 1752c6fd2807SJeff Garzik } 1753c6fd2807SJeff Garzik 1754c6fd2807SJeff Garzik /* current CHS translation info (id[53-58]) might be 1755c6fd2807SJeff Garzik * changed. reread the identify device info. 1756c6fd2807SJeff Garzik */ 1757bff04647STejun Heo flags &= ~ATA_READID_POSTRESET; 1758c6fd2807SJeff Garzik goto retry; 1759c6fd2807SJeff Garzik } 1760c6fd2807SJeff Garzik } 1761c6fd2807SJeff Garzik 1762c6fd2807SJeff Garzik *p_class = class; 1763c6fd2807SJeff Garzik 1764c6fd2807SJeff Garzik return 0; 1765c6fd2807SJeff Garzik 1766c6fd2807SJeff Garzik err_out: 1767c6fd2807SJeff Garzik if (ata_msg_warn(ap)) 1768c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_WARNING, "failed to IDENTIFY " 1769c6fd2807SJeff Garzik "(%s, err_mask=0x%x)\n", reason, err_mask); 1770c6fd2807SJeff Garzik return rc; 1771c6fd2807SJeff Garzik } 1772c6fd2807SJeff Garzik 1773c6fd2807SJeff Garzik static inline u8 ata_dev_knobble(struct ata_device *dev) 1774c6fd2807SJeff Garzik { 1775c6fd2807SJeff Garzik return ((dev->ap->cbl == ATA_CBL_SATA) && (!ata_id_is_sata(dev->id))); 1776c6fd2807SJeff Garzik } 1777c6fd2807SJeff Garzik 1778c6fd2807SJeff Garzik static void ata_dev_config_ncq(struct ata_device *dev, 1779c6fd2807SJeff Garzik char *desc, size_t desc_sz) 1780c6fd2807SJeff Garzik { 1781c6fd2807SJeff Garzik struct ata_port *ap = dev->ap; 1782c6fd2807SJeff Garzik int hdepth = 0, ddepth = ata_id_queue_depth(dev->id); 1783c6fd2807SJeff Garzik 1784c6fd2807SJeff Garzik if (!ata_id_has_ncq(dev->id)) { 1785c6fd2807SJeff Garzik desc[0] = '\0'; 1786c6fd2807SJeff Garzik return; 1787c6fd2807SJeff Garzik } 178875683fe7STejun Heo if (dev->horkage & ATA_HORKAGE_NONCQ) { 17896919a0a6SAlan Cox snprintf(desc, desc_sz, "NCQ (not used)"); 17906919a0a6SAlan Cox return; 17916919a0a6SAlan Cox } 1792c6fd2807SJeff Garzik if (ap->flags & ATA_FLAG_NCQ) { 1793cca3974eSJeff Garzik hdepth = min(ap->scsi_host->can_queue, ATA_MAX_QUEUE - 1); 1794c6fd2807SJeff Garzik dev->flags |= ATA_DFLAG_NCQ; 1795c6fd2807SJeff Garzik } 1796c6fd2807SJeff Garzik 1797c6fd2807SJeff Garzik if (hdepth >= ddepth) 1798c6fd2807SJeff Garzik snprintf(desc, desc_sz, "NCQ (depth %d)", ddepth); 1799c6fd2807SJeff Garzik else 1800c6fd2807SJeff Garzik snprintf(desc, desc_sz, "NCQ (depth %d/%d)", hdepth, ddepth); 1801c6fd2807SJeff Garzik } 1802c6fd2807SJeff Garzik 1803c6fd2807SJeff Garzik /** 1804c6fd2807SJeff Garzik * ata_dev_configure - Configure the specified ATA/ATAPI device 1805c6fd2807SJeff Garzik * @dev: Target device to configure 1806c6fd2807SJeff Garzik * 1807c6fd2807SJeff Garzik * Configure @dev according to @dev->id. Generic and low-level 1808c6fd2807SJeff Garzik * driver specific fixups are also applied. 1809c6fd2807SJeff Garzik * 1810c6fd2807SJeff Garzik * LOCKING: 1811c6fd2807SJeff Garzik * Kernel thread context (may sleep) 1812c6fd2807SJeff Garzik * 1813c6fd2807SJeff Garzik * RETURNS: 1814c6fd2807SJeff Garzik * 0 on success, -errno otherwise 1815c6fd2807SJeff Garzik */ 1816efdaedc4STejun Heo int ata_dev_configure(struct ata_device *dev) 1817c6fd2807SJeff Garzik { 1818c6fd2807SJeff Garzik struct ata_port *ap = dev->ap; 18196746544cSTejun Heo struct ata_eh_context *ehc = &ap->eh_context; 18206746544cSTejun Heo int print_info = ehc->i.flags & ATA_EHI_PRINTINFO; 1821c6fd2807SJeff Garzik const u16 *id = dev->id; 1822c6fd2807SJeff Garzik unsigned int xfer_mask; 1823b352e57dSAlan Cox char revbuf[7]; /* XYZ-99\0 */ 18243f64f565SEric D. Mudama char fwrevbuf[ATA_ID_FW_REV_LEN+1]; 18253f64f565SEric D. Mudama char modelbuf[ATA_ID_PROD_LEN+1]; 1826c6fd2807SJeff Garzik int rc; 1827c6fd2807SJeff Garzik 1828c6fd2807SJeff Garzik if (!ata_dev_enabled(dev) && ata_msg_info(ap)) { 182944877b4eSTejun Heo ata_dev_printk(dev, KERN_INFO, "%s: ENTER/EXIT -- nodev\n", 183044877b4eSTejun Heo __FUNCTION__); 1831c6fd2807SJeff Garzik return 0; 1832c6fd2807SJeff Garzik } 1833c6fd2807SJeff Garzik 1834c6fd2807SJeff Garzik if (ata_msg_probe(ap)) 183544877b4eSTejun Heo ata_dev_printk(dev, KERN_DEBUG, "%s: ENTER\n", __FUNCTION__); 1836c6fd2807SJeff Garzik 183775683fe7STejun Heo /* set horkage */ 183875683fe7STejun Heo dev->horkage |= ata_dev_blacklisted(dev); 183975683fe7STejun Heo 18406746544cSTejun Heo /* let ACPI work its magic */ 18416746544cSTejun Heo rc = ata_acpi_on_devcfg(dev); 18426746544cSTejun Heo if (rc) 18436746544cSTejun Heo return rc; 184408573a86SKristen Carlson Accardi 1845c6fd2807SJeff Garzik /* print device capabilities */ 1846c6fd2807SJeff Garzik if (ata_msg_probe(ap)) 1847c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_DEBUG, 1848c6fd2807SJeff Garzik "%s: cfg 49:%04x 82:%04x 83:%04x 84:%04x " 1849c6fd2807SJeff Garzik "85:%04x 86:%04x 87:%04x 88:%04x\n", 1850c6fd2807SJeff Garzik __FUNCTION__, 1851c6fd2807SJeff Garzik id[49], id[82], id[83], id[84], 1852c6fd2807SJeff Garzik id[85], id[86], id[87], id[88]); 1853c6fd2807SJeff Garzik 1854c6fd2807SJeff Garzik /* initialize to-be-configured parameters */ 1855c6fd2807SJeff Garzik dev->flags &= ~ATA_DFLAG_CFG_MASK; 1856c6fd2807SJeff Garzik dev->max_sectors = 0; 1857c6fd2807SJeff Garzik dev->cdb_len = 0; 1858c6fd2807SJeff Garzik dev->n_sectors = 0; 1859c6fd2807SJeff Garzik dev->cylinders = 0; 1860c6fd2807SJeff Garzik dev->heads = 0; 1861c6fd2807SJeff Garzik dev->sectors = 0; 1862c6fd2807SJeff Garzik 1863c6fd2807SJeff Garzik /* 1864c6fd2807SJeff Garzik * common ATA, ATAPI feature tests 1865c6fd2807SJeff Garzik */ 1866c6fd2807SJeff Garzik 1867c6fd2807SJeff Garzik /* find max transfer mode; for printk only */ 1868c6fd2807SJeff Garzik xfer_mask = ata_id_xfermask(id); 1869c6fd2807SJeff Garzik 1870c6fd2807SJeff Garzik if (ata_msg_probe(ap)) 1871c6fd2807SJeff Garzik ata_dump_id(id); 1872c6fd2807SJeff Garzik 1873ef143d57SAlbert Lee /* SCSI only uses 4-char revisions, dump full 8 chars from ATA */ 1874ef143d57SAlbert Lee ata_id_c_string(dev->id, fwrevbuf, ATA_ID_FW_REV, 1875ef143d57SAlbert Lee sizeof(fwrevbuf)); 1876ef143d57SAlbert Lee 1877ef143d57SAlbert Lee ata_id_c_string(dev->id, modelbuf, ATA_ID_PROD, 1878ef143d57SAlbert Lee sizeof(modelbuf)); 1879ef143d57SAlbert Lee 1880c6fd2807SJeff Garzik /* ATA-specific feature tests */ 1881c6fd2807SJeff Garzik if (dev->class == ATA_DEV_ATA) { 1882b352e57dSAlan Cox if (ata_id_is_cfa(id)) { 1883b352e57dSAlan Cox if (id[162] & 1) /* CPRM may make this media unusable */ 188444877b4eSTejun Heo ata_dev_printk(dev, KERN_WARNING, 188544877b4eSTejun Heo "supports DRM functions and may " 188644877b4eSTejun Heo "not be fully accessable.\n"); 1887b352e57dSAlan Cox snprintf(revbuf, 7, "CFA"); 1888b352e57dSAlan Cox } 1889b352e57dSAlan Cox else 1890b352e57dSAlan Cox snprintf(revbuf, 7, "ATA-%d", ata_id_major_version(id)); 1891b352e57dSAlan Cox 1892c6fd2807SJeff Garzik dev->n_sectors = ata_id_n_sectors(id); 1893c6fd2807SJeff Garzik 18943f64f565SEric D. Mudama if (dev->id[59] & 0x100) 18953f64f565SEric D. Mudama dev->multi_count = dev->id[59] & 0xff; 18963f64f565SEric D. Mudama 1897c6fd2807SJeff Garzik if (ata_id_has_lba(id)) { 1898c6fd2807SJeff Garzik const char *lba_desc; 1899c6fd2807SJeff Garzik char ncq_desc[20]; 1900c6fd2807SJeff Garzik 1901c6fd2807SJeff Garzik lba_desc = "LBA"; 1902c6fd2807SJeff Garzik dev->flags |= ATA_DFLAG_LBA; 1903c6fd2807SJeff Garzik if (ata_id_has_lba48(id)) { 1904c6fd2807SJeff Garzik dev->flags |= ATA_DFLAG_LBA48; 1905c6fd2807SJeff Garzik lba_desc = "LBA48"; 19066fc49adbSTejun Heo 19076fc49adbSTejun Heo if (dev->n_sectors >= (1UL << 28) && 19086fc49adbSTejun Heo ata_id_has_flush_ext(id)) 19096fc49adbSTejun Heo dev->flags |= ATA_DFLAG_FLUSH_EXT; 1910c6fd2807SJeff Garzik } 1911c6fd2807SJeff Garzik 19121e999736SAlan Cox if (ata_id_hpa_enabled(dev->id)) 19131e999736SAlan Cox dev->n_sectors = ata_hpa_resize(dev); 19141e999736SAlan Cox 1915c6fd2807SJeff Garzik /* config NCQ */ 1916c6fd2807SJeff Garzik ata_dev_config_ncq(dev, ncq_desc, sizeof(ncq_desc)); 1917c6fd2807SJeff Garzik 1918c6fd2807SJeff Garzik /* print device info to dmesg */ 19193f64f565SEric D. Mudama if (ata_msg_drv(ap) && print_info) { 19203f64f565SEric D. Mudama ata_dev_printk(dev, KERN_INFO, 19213f64f565SEric D. Mudama "%s: %s, %s, max %s\n", 19223f64f565SEric D. Mudama revbuf, modelbuf, fwrevbuf, 19233f64f565SEric D. Mudama ata_mode_string(xfer_mask)); 19243f64f565SEric D. Mudama ata_dev_printk(dev, KERN_INFO, 19253f64f565SEric D. Mudama "%Lu sectors, multi %u: %s %s\n", 1926c6fd2807SJeff Garzik (unsigned long long)dev->n_sectors, 19273f64f565SEric D. Mudama dev->multi_count, lba_desc, ncq_desc); 19283f64f565SEric D. Mudama } 1929c6fd2807SJeff Garzik } else { 1930c6fd2807SJeff Garzik /* CHS */ 1931c6fd2807SJeff Garzik 1932c6fd2807SJeff Garzik /* Default translation */ 1933c6fd2807SJeff Garzik dev->cylinders = id[1]; 1934c6fd2807SJeff Garzik dev->heads = id[3]; 1935c6fd2807SJeff Garzik dev->sectors = id[6]; 1936c6fd2807SJeff Garzik 1937c6fd2807SJeff Garzik if (ata_id_current_chs_valid(id)) { 1938c6fd2807SJeff Garzik /* Current CHS translation is valid. */ 1939c6fd2807SJeff Garzik dev->cylinders = id[54]; 1940c6fd2807SJeff Garzik dev->heads = id[55]; 1941c6fd2807SJeff Garzik dev->sectors = id[56]; 1942c6fd2807SJeff Garzik } 1943c6fd2807SJeff Garzik 1944c6fd2807SJeff Garzik /* print device info to dmesg */ 19453f64f565SEric D. Mudama if (ata_msg_drv(ap) && print_info) { 1946c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_INFO, 19473f64f565SEric D. Mudama "%s: %s, %s, max %s\n", 19483f64f565SEric D. Mudama revbuf, modelbuf, fwrevbuf, 19493f64f565SEric D. Mudama ata_mode_string(xfer_mask)); 19503f64f565SEric D. Mudama ata_dev_printk(dev, KERN_INFO, 19513f64f565SEric D. Mudama "%Lu sectors, multi %u, CHS %u/%u/%u\n", 19523f64f565SEric D. Mudama (unsigned long long)dev->n_sectors, 19533f64f565SEric D. Mudama dev->multi_count, dev->cylinders, 19543f64f565SEric D. Mudama dev->heads, dev->sectors); 19553f64f565SEric D. Mudama } 1956c6fd2807SJeff Garzik } 1957c6fd2807SJeff Garzik 1958c6fd2807SJeff Garzik dev->cdb_len = 16; 1959c6fd2807SJeff Garzik } 1960c6fd2807SJeff Garzik 1961c6fd2807SJeff Garzik /* ATAPI-specific feature tests */ 1962c6fd2807SJeff Garzik else if (dev->class == ATA_DEV_ATAPI) { 1963c6fd2807SJeff Garzik char *cdb_intr_string = ""; 1964c6fd2807SJeff Garzik 1965c6fd2807SJeff Garzik rc = atapi_cdb_len(id); 1966c6fd2807SJeff Garzik if ((rc < 12) || (rc > ATAPI_CDB_LEN)) { 1967c6fd2807SJeff Garzik if (ata_msg_warn(ap)) 1968c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_WARNING, 1969c6fd2807SJeff Garzik "unsupported CDB len\n"); 1970c6fd2807SJeff Garzik rc = -EINVAL; 1971c6fd2807SJeff Garzik goto err_out_nosup; 1972c6fd2807SJeff Garzik } 1973c6fd2807SJeff Garzik dev->cdb_len = (unsigned int) rc; 1974c6fd2807SJeff Garzik 1975c6fd2807SJeff Garzik if (ata_id_cdb_intr(dev->id)) { 1976c6fd2807SJeff Garzik dev->flags |= ATA_DFLAG_CDB_INTR; 1977c6fd2807SJeff Garzik cdb_intr_string = ", CDB intr"; 1978c6fd2807SJeff Garzik } 1979c6fd2807SJeff Garzik 1980c6fd2807SJeff Garzik /* print device info to dmesg */ 1981c6fd2807SJeff Garzik if (ata_msg_drv(ap) && print_info) 1982ef143d57SAlbert Lee ata_dev_printk(dev, KERN_INFO, 1983ef143d57SAlbert Lee "ATAPI: %s, %s, max %s%s\n", 1984ef143d57SAlbert Lee modelbuf, fwrevbuf, 1985c6fd2807SJeff Garzik ata_mode_string(xfer_mask), 1986c6fd2807SJeff Garzik cdb_intr_string); 1987c6fd2807SJeff Garzik } 1988c6fd2807SJeff Garzik 1989914ed354STejun Heo /* determine max_sectors */ 1990914ed354STejun Heo dev->max_sectors = ATA_MAX_SECTORS; 1991914ed354STejun Heo if (dev->flags & ATA_DFLAG_LBA48) 1992914ed354STejun Heo dev->max_sectors = ATA_MAX_SECTORS_LBA48; 1993914ed354STejun Heo 199493590859SAlan Cox if (dev->horkage & ATA_HORKAGE_DIAGNOSTIC) { 199593590859SAlan Cox /* Let the user know. We don't want to disallow opens for 199693590859SAlan Cox rescue purposes, or in case the vendor is just a blithering 199793590859SAlan Cox idiot */ 199893590859SAlan Cox if (print_info) { 199993590859SAlan Cox ata_dev_printk(dev, KERN_WARNING, 200093590859SAlan Cox "Drive reports diagnostics failure. This may indicate a drive\n"); 200193590859SAlan Cox ata_dev_printk(dev, KERN_WARNING, 200293590859SAlan Cox "fault or invalid emulation. Contact drive vendor for information.\n"); 200393590859SAlan Cox } 200493590859SAlan Cox } 200593590859SAlan Cox 2006c6fd2807SJeff Garzik /* limit bridge transfers to udma5, 200 sectors */ 2007c6fd2807SJeff Garzik if (ata_dev_knobble(dev)) { 2008c6fd2807SJeff Garzik if (ata_msg_drv(ap) && print_info) 2009c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_INFO, 2010c6fd2807SJeff Garzik "applying bridge limits\n"); 2011c6fd2807SJeff Garzik dev->udma_mask &= ATA_UDMA5; 2012c6fd2807SJeff Garzik dev->max_sectors = ATA_MAX_SECTORS; 2013c6fd2807SJeff Garzik } 2014c6fd2807SJeff Garzik 201575683fe7STejun Heo if (dev->horkage & ATA_HORKAGE_MAX_SEC_128) 201603ec52deSTejun Heo dev->max_sectors = min_t(unsigned int, ATA_MAX_SECTORS_128, 201703ec52deSTejun Heo dev->max_sectors); 201818d6e9d5SAlbert Lee 2019c6fd2807SJeff Garzik if (ap->ops->dev_config) 2020cd0d3bbcSAlan ap->ops->dev_config(dev); 2021c6fd2807SJeff Garzik 2022c6fd2807SJeff Garzik if (ata_msg_probe(ap)) 2023c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_DEBUG, "%s: EXIT, drv_stat = 0x%x\n", 2024c6fd2807SJeff Garzik __FUNCTION__, ata_chk_status(ap)); 2025c6fd2807SJeff Garzik return 0; 2026c6fd2807SJeff Garzik 2027c6fd2807SJeff Garzik err_out_nosup: 2028c6fd2807SJeff Garzik if (ata_msg_probe(ap)) 2029c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_DEBUG, 2030c6fd2807SJeff Garzik "%s: EXIT, err\n", __FUNCTION__); 2031c6fd2807SJeff Garzik return rc; 2032c6fd2807SJeff Garzik } 2033c6fd2807SJeff Garzik 2034c6fd2807SJeff Garzik /** 20352e41e8e6SAlan Cox * ata_cable_40wire - return 40 wire cable type 2036be0d18dfSAlan Cox * @ap: port 2037be0d18dfSAlan Cox * 20382e41e8e6SAlan Cox * Helper method for drivers which want to hardwire 40 wire cable 2039be0d18dfSAlan Cox * detection. 2040be0d18dfSAlan Cox */ 2041be0d18dfSAlan Cox 2042be0d18dfSAlan Cox int ata_cable_40wire(struct ata_port *ap) 2043be0d18dfSAlan Cox { 2044be0d18dfSAlan Cox return ATA_CBL_PATA40; 2045be0d18dfSAlan Cox } 2046be0d18dfSAlan Cox 2047be0d18dfSAlan Cox /** 20482e41e8e6SAlan Cox * ata_cable_80wire - return 80 wire cable type 2049be0d18dfSAlan Cox * @ap: port 2050be0d18dfSAlan Cox * 20512e41e8e6SAlan Cox * Helper method for drivers which want to hardwire 80 wire cable 2052be0d18dfSAlan Cox * detection. 2053be0d18dfSAlan Cox */ 2054be0d18dfSAlan Cox 2055be0d18dfSAlan Cox int ata_cable_80wire(struct ata_port *ap) 2056be0d18dfSAlan Cox { 2057be0d18dfSAlan Cox return ATA_CBL_PATA80; 2058be0d18dfSAlan Cox } 2059be0d18dfSAlan Cox 2060be0d18dfSAlan Cox /** 2061be0d18dfSAlan Cox * ata_cable_unknown - return unknown PATA cable. 2062be0d18dfSAlan Cox * @ap: port 2063be0d18dfSAlan Cox * 2064be0d18dfSAlan Cox * Helper method for drivers which have no PATA cable detection. 2065be0d18dfSAlan Cox */ 2066be0d18dfSAlan Cox 2067be0d18dfSAlan Cox int ata_cable_unknown(struct ata_port *ap) 2068be0d18dfSAlan Cox { 2069be0d18dfSAlan Cox return ATA_CBL_PATA_UNK; 2070be0d18dfSAlan Cox } 2071be0d18dfSAlan Cox 2072be0d18dfSAlan Cox /** 2073be0d18dfSAlan Cox * ata_cable_sata - return SATA cable type 2074be0d18dfSAlan Cox * @ap: port 2075be0d18dfSAlan Cox * 2076be0d18dfSAlan Cox * Helper method for drivers which have SATA cables 2077be0d18dfSAlan Cox */ 2078be0d18dfSAlan Cox 2079be0d18dfSAlan Cox int ata_cable_sata(struct ata_port *ap) 2080be0d18dfSAlan Cox { 2081be0d18dfSAlan Cox return ATA_CBL_SATA; 2082be0d18dfSAlan Cox } 2083be0d18dfSAlan Cox 2084be0d18dfSAlan Cox /** 2085c6fd2807SJeff Garzik * ata_bus_probe - Reset and probe ATA bus 2086c6fd2807SJeff Garzik * @ap: Bus to probe 2087c6fd2807SJeff Garzik * 2088c6fd2807SJeff Garzik * Master ATA bus probing function. Initiates a hardware-dependent 2089c6fd2807SJeff Garzik * bus reset, then attempts to identify any devices found on 2090c6fd2807SJeff Garzik * the bus. 2091c6fd2807SJeff Garzik * 2092c6fd2807SJeff Garzik * LOCKING: 2093c6fd2807SJeff Garzik * PCI/etc. bus probe sem. 2094c6fd2807SJeff Garzik * 2095c6fd2807SJeff Garzik * RETURNS: 2096c6fd2807SJeff Garzik * Zero on success, negative errno otherwise. 2097c6fd2807SJeff Garzik */ 2098c6fd2807SJeff Garzik 2099c6fd2807SJeff Garzik int ata_bus_probe(struct ata_port *ap) 2100c6fd2807SJeff Garzik { 2101c6fd2807SJeff Garzik unsigned int classes[ATA_MAX_DEVICES]; 2102c6fd2807SJeff Garzik int tries[ATA_MAX_DEVICES]; 21034ae72a1eSTejun Heo int i, rc; 2104c6fd2807SJeff Garzik struct ata_device *dev; 2105c6fd2807SJeff Garzik 2106c6fd2807SJeff Garzik ata_port_probe(ap); 2107c6fd2807SJeff Garzik 2108c6fd2807SJeff Garzik for (i = 0; i < ATA_MAX_DEVICES; i++) 2109c6fd2807SJeff Garzik tries[i] = ATA_PROBE_MAX_TRIES; 2110c6fd2807SJeff Garzik 2111c6fd2807SJeff Garzik retry: 2112c6fd2807SJeff Garzik /* reset and determine device classes */ 2113c6fd2807SJeff Garzik ap->ops->phy_reset(ap); 2114c6fd2807SJeff Garzik 2115c6fd2807SJeff Garzik for (i = 0; i < ATA_MAX_DEVICES; i++) { 2116c6fd2807SJeff Garzik dev = &ap->device[i]; 2117c6fd2807SJeff Garzik 2118c6fd2807SJeff Garzik if (!(ap->flags & ATA_FLAG_DISABLED) && 2119c6fd2807SJeff Garzik dev->class != ATA_DEV_UNKNOWN) 2120c6fd2807SJeff Garzik classes[dev->devno] = dev->class; 2121c6fd2807SJeff Garzik else 2122c6fd2807SJeff Garzik classes[dev->devno] = ATA_DEV_NONE; 2123c6fd2807SJeff Garzik 2124c6fd2807SJeff Garzik dev->class = ATA_DEV_UNKNOWN; 2125c6fd2807SJeff Garzik } 2126c6fd2807SJeff Garzik 2127c6fd2807SJeff Garzik ata_port_probe(ap); 2128c6fd2807SJeff Garzik 2129c6fd2807SJeff Garzik /* after the reset the device state is PIO 0 and the controller 2130c6fd2807SJeff Garzik state is undefined. Record the mode */ 2131c6fd2807SJeff Garzik 2132c6fd2807SJeff Garzik for (i = 0; i < ATA_MAX_DEVICES; i++) 2133c6fd2807SJeff Garzik ap->device[i].pio_mode = XFER_PIO_0; 2134c6fd2807SJeff Garzik 2135f31f0cc2SJeff Garzik /* read IDENTIFY page and configure devices. We have to do the identify 2136f31f0cc2SJeff Garzik specific sequence bass-ackwards so that PDIAG- is released by 2137f31f0cc2SJeff Garzik the slave device */ 2138f31f0cc2SJeff Garzik 2139f31f0cc2SJeff Garzik for (i = ATA_MAX_DEVICES - 1; i >= 0; i--) { 2140c6fd2807SJeff Garzik dev = &ap->device[i]; 2141c6fd2807SJeff Garzik 2142c6fd2807SJeff Garzik if (tries[i]) 2143c6fd2807SJeff Garzik dev->class = classes[i]; 2144c6fd2807SJeff Garzik 2145c6fd2807SJeff Garzik if (!ata_dev_enabled(dev)) 2146c6fd2807SJeff Garzik continue; 2147c6fd2807SJeff Garzik 2148bff04647STejun Heo rc = ata_dev_read_id(dev, &dev->class, ATA_READID_POSTRESET, 2149bff04647STejun Heo dev->id); 2150c6fd2807SJeff Garzik if (rc) 2151c6fd2807SJeff Garzik goto fail; 2152f31f0cc2SJeff Garzik } 2153f31f0cc2SJeff Garzik 2154be0d18dfSAlan Cox /* Now ask for the cable type as PDIAG- should have been released */ 2155be0d18dfSAlan Cox if (ap->ops->cable_detect) 2156be0d18dfSAlan Cox ap->cbl = ap->ops->cable_detect(ap); 2157be0d18dfSAlan Cox 2158f31f0cc2SJeff Garzik /* After the identify sequence we can now set up the devices. We do 2159f31f0cc2SJeff Garzik this in the normal order so that the user doesn't get confused */ 2160f31f0cc2SJeff Garzik 2161f31f0cc2SJeff Garzik for(i = 0; i < ATA_MAX_DEVICES; i++) { 2162f31f0cc2SJeff Garzik dev = &ap->device[i]; 2163f31f0cc2SJeff Garzik if (!ata_dev_enabled(dev)) 2164f31f0cc2SJeff Garzik continue; 2165c6fd2807SJeff Garzik 2166efdaedc4STejun Heo ap->eh_context.i.flags |= ATA_EHI_PRINTINFO; 2167efdaedc4STejun Heo rc = ata_dev_configure(dev); 2168efdaedc4STejun Heo ap->eh_context.i.flags &= ~ATA_EHI_PRINTINFO; 2169c6fd2807SJeff Garzik if (rc) 2170c6fd2807SJeff Garzik goto fail; 2171c6fd2807SJeff Garzik } 2172c6fd2807SJeff Garzik 2173c6fd2807SJeff Garzik /* configure transfer mode */ 2174c6fd2807SJeff Garzik rc = ata_set_mode(ap, &dev); 21754ae72a1eSTejun Heo if (rc) 2176c6fd2807SJeff Garzik goto fail; 2177c6fd2807SJeff Garzik 2178c6fd2807SJeff Garzik for (i = 0; i < ATA_MAX_DEVICES; i++) 2179c6fd2807SJeff Garzik if (ata_dev_enabled(&ap->device[i])) 2180c6fd2807SJeff Garzik return 0; 2181c6fd2807SJeff Garzik 2182c6fd2807SJeff Garzik /* no device present, disable port */ 2183c6fd2807SJeff Garzik ata_port_disable(ap); 2184c6fd2807SJeff Garzik ap->ops->port_disable(ap); 2185c6fd2807SJeff Garzik return -ENODEV; 2186c6fd2807SJeff Garzik 2187c6fd2807SJeff Garzik fail: 21884ae72a1eSTejun Heo tries[dev->devno]--; 21894ae72a1eSTejun Heo 2190c6fd2807SJeff Garzik switch (rc) { 2191c6fd2807SJeff Garzik case -EINVAL: 21924ae72a1eSTejun Heo /* eeek, something went very wrong, give up */ 2193c6fd2807SJeff Garzik tries[dev->devno] = 0; 2194c6fd2807SJeff Garzik break; 21954ae72a1eSTejun Heo 21964ae72a1eSTejun Heo case -ENODEV: 21974ae72a1eSTejun Heo /* give it just one more chance */ 21984ae72a1eSTejun Heo tries[dev->devno] = min(tries[dev->devno], 1); 2199c6fd2807SJeff Garzik case -EIO: 22004ae72a1eSTejun Heo if (tries[dev->devno] == 1) { 22014ae72a1eSTejun Heo /* This is the last chance, better to slow 22024ae72a1eSTejun Heo * down than lose it. 22034ae72a1eSTejun Heo */ 2204c6fd2807SJeff Garzik sata_down_spd_limit(ap); 22054ae72a1eSTejun Heo ata_down_xfermask_limit(dev, ATA_DNXFER_PIO); 22064ae72a1eSTejun Heo } 2207c6fd2807SJeff Garzik } 2208c6fd2807SJeff Garzik 22094ae72a1eSTejun Heo if (!tries[dev->devno]) 2210c6fd2807SJeff Garzik ata_dev_disable(dev); 2211c6fd2807SJeff Garzik 2212c6fd2807SJeff Garzik goto retry; 2213c6fd2807SJeff Garzik } 2214c6fd2807SJeff Garzik 2215c6fd2807SJeff Garzik /** 2216c6fd2807SJeff Garzik * ata_port_probe - Mark port as enabled 2217c6fd2807SJeff Garzik * @ap: Port for which we indicate enablement 2218c6fd2807SJeff Garzik * 2219c6fd2807SJeff Garzik * Modify @ap data structure such that the system 2220c6fd2807SJeff Garzik * thinks that the entire port is enabled. 2221c6fd2807SJeff Garzik * 2222cca3974eSJeff Garzik * LOCKING: host lock, or some other form of 2223c6fd2807SJeff Garzik * serialization. 2224c6fd2807SJeff Garzik */ 2225c6fd2807SJeff Garzik 2226c6fd2807SJeff Garzik void ata_port_probe(struct ata_port *ap) 2227c6fd2807SJeff Garzik { 2228c6fd2807SJeff Garzik ap->flags &= ~ATA_FLAG_DISABLED; 2229c6fd2807SJeff Garzik } 2230c6fd2807SJeff Garzik 2231c6fd2807SJeff Garzik /** 2232c6fd2807SJeff Garzik * sata_print_link_status - Print SATA link status 2233c6fd2807SJeff Garzik * @ap: SATA port to printk link status about 2234c6fd2807SJeff Garzik * 2235c6fd2807SJeff Garzik * This function prints link speed and status of a SATA link. 2236c6fd2807SJeff Garzik * 2237c6fd2807SJeff Garzik * LOCKING: 2238c6fd2807SJeff Garzik * None. 2239c6fd2807SJeff Garzik */ 224043727fbcSJeff Garzik void sata_print_link_status(struct ata_port *ap) 2241c6fd2807SJeff Garzik { 2242c6fd2807SJeff Garzik u32 sstatus, scontrol, tmp; 2243c6fd2807SJeff Garzik 2244c6fd2807SJeff Garzik if (sata_scr_read(ap, SCR_STATUS, &sstatus)) 2245c6fd2807SJeff Garzik return; 2246c6fd2807SJeff Garzik sata_scr_read(ap, SCR_CONTROL, &scontrol); 2247c6fd2807SJeff Garzik 2248c6fd2807SJeff Garzik if (ata_port_online(ap)) { 2249c6fd2807SJeff Garzik tmp = (sstatus >> 4) & 0xf; 2250c6fd2807SJeff Garzik ata_port_printk(ap, KERN_INFO, 2251c6fd2807SJeff Garzik "SATA link up %s (SStatus %X SControl %X)\n", 2252c6fd2807SJeff Garzik sata_spd_string(tmp), sstatus, scontrol); 2253c6fd2807SJeff Garzik } else { 2254c6fd2807SJeff Garzik ata_port_printk(ap, KERN_INFO, 2255c6fd2807SJeff Garzik "SATA link down (SStatus %X SControl %X)\n", 2256c6fd2807SJeff Garzik sstatus, scontrol); 2257c6fd2807SJeff Garzik } 2258c6fd2807SJeff Garzik } 2259c6fd2807SJeff Garzik 2260c6fd2807SJeff Garzik /** 2261c6fd2807SJeff Garzik * __sata_phy_reset - Wake/reset a low-level SATA PHY 2262c6fd2807SJeff Garzik * @ap: SATA port associated with target SATA PHY. 2263c6fd2807SJeff Garzik * 2264c6fd2807SJeff Garzik * This function issues commands to standard SATA Sxxx 2265c6fd2807SJeff Garzik * PHY registers, to wake up the phy (and device), and 2266c6fd2807SJeff Garzik * clear any reset condition. 2267c6fd2807SJeff Garzik * 2268c6fd2807SJeff Garzik * LOCKING: 2269c6fd2807SJeff Garzik * PCI/etc. bus probe sem. 2270c6fd2807SJeff Garzik * 2271c6fd2807SJeff Garzik */ 2272c6fd2807SJeff Garzik void __sata_phy_reset(struct ata_port *ap) 2273c6fd2807SJeff Garzik { 2274c6fd2807SJeff Garzik u32 sstatus; 2275c6fd2807SJeff Garzik unsigned long timeout = jiffies + (HZ * 5); 2276c6fd2807SJeff Garzik 2277c6fd2807SJeff Garzik if (ap->flags & ATA_FLAG_SATA_RESET) { 2278c6fd2807SJeff Garzik /* issue phy wake/reset */ 2279c6fd2807SJeff Garzik sata_scr_write_flush(ap, SCR_CONTROL, 0x301); 2280c6fd2807SJeff Garzik /* Couldn't find anything in SATA I/II specs, but 2281c6fd2807SJeff Garzik * AHCI-1.1 10.4.2 says at least 1 ms. */ 2282c6fd2807SJeff Garzik mdelay(1); 2283c6fd2807SJeff Garzik } 2284c6fd2807SJeff Garzik /* phy wake/clear reset */ 2285c6fd2807SJeff Garzik sata_scr_write_flush(ap, SCR_CONTROL, 0x300); 2286c6fd2807SJeff Garzik 2287c6fd2807SJeff Garzik /* wait for phy to become ready, if necessary */ 2288c6fd2807SJeff Garzik do { 2289c6fd2807SJeff Garzik msleep(200); 2290c6fd2807SJeff Garzik sata_scr_read(ap, SCR_STATUS, &sstatus); 2291c6fd2807SJeff Garzik if ((sstatus & 0xf) != 1) 2292c6fd2807SJeff Garzik break; 2293c6fd2807SJeff Garzik } while (time_before(jiffies, timeout)); 2294c6fd2807SJeff Garzik 2295c6fd2807SJeff Garzik /* print link status */ 2296c6fd2807SJeff Garzik sata_print_link_status(ap); 2297c6fd2807SJeff Garzik 2298c6fd2807SJeff Garzik /* TODO: phy layer with polling, timeouts, etc. */ 2299c6fd2807SJeff Garzik if (!ata_port_offline(ap)) 2300c6fd2807SJeff Garzik ata_port_probe(ap); 2301c6fd2807SJeff Garzik else 2302c6fd2807SJeff Garzik ata_port_disable(ap); 2303c6fd2807SJeff Garzik 2304c6fd2807SJeff Garzik if (ap->flags & ATA_FLAG_DISABLED) 2305c6fd2807SJeff Garzik return; 2306c6fd2807SJeff Garzik 2307c6fd2807SJeff Garzik if (ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT)) { 2308c6fd2807SJeff Garzik ata_port_disable(ap); 2309c6fd2807SJeff Garzik return; 2310c6fd2807SJeff Garzik } 2311c6fd2807SJeff Garzik 2312c6fd2807SJeff Garzik ap->cbl = ATA_CBL_SATA; 2313c6fd2807SJeff Garzik } 2314c6fd2807SJeff Garzik 2315c6fd2807SJeff Garzik /** 2316c6fd2807SJeff Garzik * sata_phy_reset - Reset SATA bus. 2317c6fd2807SJeff Garzik * @ap: SATA port associated with target SATA PHY. 2318c6fd2807SJeff Garzik * 2319c6fd2807SJeff Garzik * This function resets the SATA bus, and then probes 2320c6fd2807SJeff Garzik * the bus for devices. 2321c6fd2807SJeff Garzik * 2322c6fd2807SJeff Garzik * LOCKING: 2323c6fd2807SJeff Garzik * PCI/etc. bus probe sem. 2324c6fd2807SJeff Garzik * 2325c6fd2807SJeff Garzik */ 2326c6fd2807SJeff Garzik void sata_phy_reset(struct ata_port *ap) 2327c6fd2807SJeff Garzik { 2328c6fd2807SJeff Garzik __sata_phy_reset(ap); 2329c6fd2807SJeff Garzik if (ap->flags & ATA_FLAG_DISABLED) 2330c6fd2807SJeff Garzik return; 2331c6fd2807SJeff Garzik ata_bus_reset(ap); 2332c6fd2807SJeff Garzik } 2333c6fd2807SJeff Garzik 2334c6fd2807SJeff Garzik /** 2335c6fd2807SJeff Garzik * ata_dev_pair - return other device on cable 2336c6fd2807SJeff Garzik * @adev: device 2337c6fd2807SJeff Garzik * 2338c6fd2807SJeff Garzik * Obtain the other device on the same cable, or if none is 2339c6fd2807SJeff Garzik * present NULL is returned 2340c6fd2807SJeff Garzik */ 2341c6fd2807SJeff Garzik 2342c6fd2807SJeff Garzik struct ata_device *ata_dev_pair(struct ata_device *adev) 2343c6fd2807SJeff Garzik { 2344c6fd2807SJeff Garzik struct ata_port *ap = adev->ap; 2345c6fd2807SJeff Garzik struct ata_device *pair = &ap->device[1 - adev->devno]; 2346c6fd2807SJeff Garzik if (!ata_dev_enabled(pair)) 2347c6fd2807SJeff Garzik return NULL; 2348c6fd2807SJeff Garzik return pair; 2349c6fd2807SJeff Garzik } 2350c6fd2807SJeff Garzik 2351c6fd2807SJeff Garzik /** 2352c6fd2807SJeff Garzik * ata_port_disable - Disable port. 2353c6fd2807SJeff Garzik * @ap: Port to be disabled. 2354c6fd2807SJeff Garzik * 2355c6fd2807SJeff Garzik * Modify @ap data structure such that the system 2356c6fd2807SJeff Garzik * thinks that the entire port is disabled, and should 2357c6fd2807SJeff Garzik * never attempt to probe or communicate with devices 2358c6fd2807SJeff Garzik * on this port. 2359c6fd2807SJeff Garzik * 2360cca3974eSJeff Garzik * LOCKING: host lock, or some other form of 2361c6fd2807SJeff Garzik * serialization. 2362c6fd2807SJeff Garzik */ 2363c6fd2807SJeff Garzik 2364c6fd2807SJeff Garzik void ata_port_disable(struct ata_port *ap) 2365c6fd2807SJeff Garzik { 2366c6fd2807SJeff Garzik ap->device[0].class = ATA_DEV_NONE; 2367c6fd2807SJeff Garzik ap->device[1].class = ATA_DEV_NONE; 2368c6fd2807SJeff Garzik ap->flags |= ATA_FLAG_DISABLED; 2369c6fd2807SJeff Garzik } 2370c6fd2807SJeff Garzik 2371c6fd2807SJeff Garzik /** 2372c6fd2807SJeff Garzik * sata_down_spd_limit - adjust SATA spd limit downward 2373c6fd2807SJeff Garzik * @ap: Port to adjust SATA spd limit for 2374c6fd2807SJeff Garzik * 2375c6fd2807SJeff Garzik * Adjust SATA spd limit of @ap downward. Note that this 2376c6fd2807SJeff Garzik * function only adjusts the limit. The change must be applied 2377c6fd2807SJeff Garzik * using sata_set_spd(). 2378c6fd2807SJeff Garzik * 2379c6fd2807SJeff Garzik * LOCKING: 2380c6fd2807SJeff Garzik * Inherited from caller. 2381c6fd2807SJeff Garzik * 2382c6fd2807SJeff Garzik * RETURNS: 2383c6fd2807SJeff Garzik * 0 on success, negative errno on failure 2384c6fd2807SJeff Garzik */ 2385c6fd2807SJeff Garzik int sata_down_spd_limit(struct ata_port *ap) 2386c6fd2807SJeff Garzik { 2387c6fd2807SJeff Garzik u32 sstatus, spd, mask; 2388c6fd2807SJeff Garzik int rc, highbit; 2389c6fd2807SJeff Garzik 2390c6fd2807SJeff Garzik rc = sata_scr_read(ap, SCR_STATUS, &sstatus); 2391c6fd2807SJeff Garzik if (rc) 2392c6fd2807SJeff Garzik return rc; 2393c6fd2807SJeff Garzik 2394c6fd2807SJeff Garzik mask = ap->sata_spd_limit; 2395c6fd2807SJeff Garzik if (mask <= 1) 2396c6fd2807SJeff Garzik return -EINVAL; 2397c6fd2807SJeff Garzik highbit = fls(mask) - 1; 2398c6fd2807SJeff Garzik mask &= ~(1 << highbit); 2399c6fd2807SJeff Garzik 2400c6fd2807SJeff Garzik spd = (sstatus >> 4) & 0xf; 2401c6fd2807SJeff Garzik if (spd <= 1) 2402c6fd2807SJeff Garzik return -EINVAL; 2403c6fd2807SJeff Garzik spd--; 2404c6fd2807SJeff Garzik mask &= (1 << spd) - 1; 2405c6fd2807SJeff Garzik if (!mask) 2406c6fd2807SJeff Garzik return -EINVAL; 2407c6fd2807SJeff Garzik 2408c6fd2807SJeff Garzik ap->sata_spd_limit = mask; 2409c6fd2807SJeff Garzik 2410c6fd2807SJeff Garzik ata_port_printk(ap, KERN_WARNING, "limiting SATA link speed to %s\n", 2411c6fd2807SJeff Garzik sata_spd_string(fls(mask))); 2412c6fd2807SJeff Garzik 2413c6fd2807SJeff Garzik return 0; 2414c6fd2807SJeff Garzik } 2415c6fd2807SJeff Garzik 2416c6fd2807SJeff Garzik static int __sata_set_spd_needed(struct ata_port *ap, u32 *scontrol) 2417c6fd2807SJeff Garzik { 2418c6fd2807SJeff Garzik u32 spd, limit; 2419c6fd2807SJeff Garzik 2420c6fd2807SJeff Garzik if (ap->sata_spd_limit == UINT_MAX) 2421c6fd2807SJeff Garzik limit = 0; 2422c6fd2807SJeff Garzik else 2423c6fd2807SJeff Garzik limit = fls(ap->sata_spd_limit); 2424c6fd2807SJeff Garzik 2425c6fd2807SJeff Garzik spd = (*scontrol >> 4) & 0xf; 2426c6fd2807SJeff Garzik *scontrol = (*scontrol & ~0xf0) | ((limit & 0xf) << 4); 2427c6fd2807SJeff Garzik 2428c6fd2807SJeff Garzik return spd != limit; 2429c6fd2807SJeff Garzik } 2430c6fd2807SJeff Garzik 2431c6fd2807SJeff Garzik /** 2432c6fd2807SJeff Garzik * sata_set_spd_needed - is SATA spd configuration needed 2433c6fd2807SJeff Garzik * @ap: Port in question 2434c6fd2807SJeff Garzik * 2435c6fd2807SJeff Garzik * Test whether the spd limit in SControl matches 2436c6fd2807SJeff Garzik * @ap->sata_spd_limit. This function is used to determine 2437c6fd2807SJeff Garzik * whether hardreset is necessary to apply SATA spd 2438c6fd2807SJeff Garzik * configuration. 2439c6fd2807SJeff Garzik * 2440c6fd2807SJeff Garzik * LOCKING: 2441c6fd2807SJeff Garzik * Inherited from caller. 2442c6fd2807SJeff Garzik * 2443c6fd2807SJeff Garzik * RETURNS: 2444c6fd2807SJeff Garzik * 1 if SATA spd configuration is needed, 0 otherwise. 2445c6fd2807SJeff Garzik */ 2446c6fd2807SJeff Garzik int sata_set_spd_needed(struct ata_port *ap) 2447c6fd2807SJeff Garzik { 2448c6fd2807SJeff Garzik u32 scontrol; 2449c6fd2807SJeff Garzik 2450c6fd2807SJeff Garzik if (sata_scr_read(ap, SCR_CONTROL, &scontrol)) 2451c6fd2807SJeff Garzik return 0; 2452c6fd2807SJeff Garzik 2453c6fd2807SJeff Garzik return __sata_set_spd_needed(ap, &scontrol); 2454c6fd2807SJeff Garzik } 2455c6fd2807SJeff Garzik 2456c6fd2807SJeff Garzik /** 2457c6fd2807SJeff Garzik * sata_set_spd - set SATA spd according to spd limit 2458c6fd2807SJeff Garzik * @ap: Port to set SATA spd for 2459c6fd2807SJeff Garzik * 2460c6fd2807SJeff Garzik * Set SATA spd of @ap according to sata_spd_limit. 2461c6fd2807SJeff Garzik * 2462c6fd2807SJeff Garzik * LOCKING: 2463c6fd2807SJeff Garzik * Inherited from caller. 2464c6fd2807SJeff Garzik * 2465c6fd2807SJeff Garzik * RETURNS: 2466c6fd2807SJeff Garzik * 0 if spd doesn't need to be changed, 1 if spd has been 2467c6fd2807SJeff Garzik * changed. Negative errno if SCR registers are inaccessible. 2468c6fd2807SJeff Garzik */ 2469c6fd2807SJeff Garzik int sata_set_spd(struct ata_port *ap) 2470c6fd2807SJeff Garzik { 2471c6fd2807SJeff Garzik u32 scontrol; 2472c6fd2807SJeff Garzik int rc; 2473c6fd2807SJeff Garzik 2474c6fd2807SJeff Garzik if ((rc = sata_scr_read(ap, SCR_CONTROL, &scontrol))) 2475c6fd2807SJeff Garzik return rc; 2476c6fd2807SJeff Garzik 2477c6fd2807SJeff Garzik if (!__sata_set_spd_needed(ap, &scontrol)) 2478c6fd2807SJeff Garzik return 0; 2479c6fd2807SJeff Garzik 2480c6fd2807SJeff Garzik if ((rc = sata_scr_write(ap, SCR_CONTROL, scontrol))) 2481c6fd2807SJeff Garzik return rc; 2482c6fd2807SJeff Garzik 2483c6fd2807SJeff Garzik return 1; 2484c6fd2807SJeff Garzik } 2485c6fd2807SJeff Garzik 2486c6fd2807SJeff Garzik /* 2487c6fd2807SJeff Garzik * This mode timing computation functionality is ported over from 2488c6fd2807SJeff Garzik * drivers/ide/ide-timing.h and was originally written by Vojtech Pavlik 2489c6fd2807SJeff Garzik */ 2490c6fd2807SJeff Garzik /* 2491b352e57dSAlan Cox * PIO 0-4, MWDMA 0-2 and UDMA 0-6 timings (in nanoseconds). 2492c6fd2807SJeff Garzik * These were taken from ATA/ATAPI-6 standard, rev 0a, except 2493b352e57dSAlan Cox * for UDMA6, which is currently supported only by Maxtor drives. 2494b352e57dSAlan Cox * 2495b352e57dSAlan Cox * For PIO 5/6 MWDMA 3/4 see the CFA specification 3.0. 2496c6fd2807SJeff Garzik */ 2497c6fd2807SJeff Garzik 2498c6fd2807SJeff Garzik static const struct ata_timing ata_timing[] = { 2499c6fd2807SJeff Garzik 2500c6fd2807SJeff Garzik { XFER_UDMA_6, 0, 0, 0, 0, 0, 0, 0, 15 }, 2501c6fd2807SJeff Garzik { XFER_UDMA_5, 0, 0, 0, 0, 0, 0, 0, 20 }, 2502c6fd2807SJeff Garzik { XFER_UDMA_4, 0, 0, 0, 0, 0, 0, 0, 30 }, 2503c6fd2807SJeff Garzik { XFER_UDMA_3, 0, 0, 0, 0, 0, 0, 0, 45 }, 2504c6fd2807SJeff Garzik 2505b352e57dSAlan Cox { XFER_MW_DMA_4, 25, 0, 0, 0, 55, 20, 80, 0 }, 2506b352e57dSAlan Cox { XFER_MW_DMA_3, 25, 0, 0, 0, 65, 25, 100, 0 }, 2507c6fd2807SJeff Garzik { XFER_UDMA_2, 0, 0, 0, 0, 0, 0, 0, 60 }, 2508c6fd2807SJeff Garzik { XFER_UDMA_1, 0, 0, 0, 0, 0, 0, 0, 80 }, 2509c6fd2807SJeff Garzik { XFER_UDMA_0, 0, 0, 0, 0, 0, 0, 0, 120 }, 2510c6fd2807SJeff Garzik 2511c6fd2807SJeff Garzik /* { XFER_UDMA_SLOW, 0, 0, 0, 0, 0, 0, 0, 150 }, */ 2512c6fd2807SJeff Garzik 2513c6fd2807SJeff Garzik { XFER_MW_DMA_2, 25, 0, 0, 0, 70, 25, 120, 0 }, 2514c6fd2807SJeff Garzik { XFER_MW_DMA_1, 45, 0, 0, 0, 80, 50, 150, 0 }, 2515c6fd2807SJeff Garzik { XFER_MW_DMA_0, 60, 0, 0, 0, 215, 215, 480, 0 }, 2516c6fd2807SJeff Garzik 2517c6fd2807SJeff Garzik { XFER_SW_DMA_2, 60, 0, 0, 0, 120, 120, 240, 0 }, 2518c6fd2807SJeff Garzik { XFER_SW_DMA_1, 90, 0, 0, 0, 240, 240, 480, 0 }, 2519c6fd2807SJeff Garzik { XFER_SW_DMA_0, 120, 0, 0, 0, 480, 480, 960, 0 }, 2520c6fd2807SJeff Garzik 2521b352e57dSAlan Cox { XFER_PIO_6, 10, 55, 20, 80, 55, 20, 80, 0 }, 2522b352e57dSAlan Cox { XFER_PIO_5, 15, 65, 25, 100, 65, 25, 100, 0 }, 2523c6fd2807SJeff Garzik { XFER_PIO_4, 25, 70, 25, 120, 70, 25, 120, 0 }, 2524c6fd2807SJeff Garzik { XFER_PIO_3, 30, 80, 70, 180, 80, 70, 180, 0 }, 2525c6fd2807SJeff Garzik 2526c6fd2807SJeff Garzik { XFER_PIO_2, 30, 290, 40, 330, 100, 90, 240, 0 }, 2527c6fd2807SJeff Garzik { XFER_PIO_1, 50, 290, 93, 383, 125, 100, 383, 0 }, 2528c6fd2807SJeff Garzik { XFER_PIO_0, 70, 290, 240, 600, 165, 150, 600, 0 }, 2529c6fd2807SJeff Garzik 2530c6fd2807SJeff Garzik /* { XFER_PIO_SLOW, 120, 290, 240, 960, 290, 240, 960, 0 }, */ 2531c6fd2807SJeff Garzik 2532c6fd2807SJeff Garzik { 0xFF } 2533c6fd2807SJeff Garzik }; 2534c6fd2807SJeff Garzik 2535c6fd2807SJeff Garzik #define ENOUGH(v,unit) (((v)-1)/(unit)+1) 2536c6fd2807SJeff Garzik #define EZ(v,unit) ((v)?ENOUGH(v,unit):0) 2537c6fd2807SJeff Garzik 2538c6fd2807SJeff Garzik static void ata_timing_quantize(const struct ata_timing *t, struct ata_timing *q, int T, int UT) 2539c6fd2807SJeff Garzik { 2540c6fd2807SJeff Garzik q->setup = EZ(t->setup * 1000, T); 2541c6fd2807SJeff Garzik q->act8b = EZ(t->act8b * 1000, T); 2542c6fd2807SJeff Garzik q->rec8b = EZ(t->rec8b * 1000, T); 2543c6fd2807SJeff Garzik q->cyc8b = EZ(t->cyc8b * 1000, T); 2544c6fd2807SJeff Garzik q->active = EZ(t->active * 1000, T); 2545c6fd2807SJeff Garzik q->recover = EZ(t->recover * 1000, T); 2546c6fd2807SJeff Garzik q->cycle = EZ(t->cycle * 1000, T); 2547c6fd2807SJeff Garzik q->udma = EZ(t->udma * 1000, UT); 2548c6fd2807SJeff Garzik } 2549c6fd2807SJeff Garzik 2550c6fd2807SJeff Garzik void ata_timing_merge(const struct ata_timing *a, const struct ata_timing *b, 2551c6fd2807SJeff Garzik struct ata_timing *m, unsigned int what) 2552c6fd2807SJeff Garzik { 2553c6fd2807SJeff Garzik if (what & ATA_TIMING_SETUP ) m->setup = max(a->setup, b->setup); 2554c6fd2807SJeff Garzik if (what & ATA_TIMING_ACT8B ) m->act8b = max(a->act8b, b->act8b); 2555c6fd2807SJeff Garzik if (what & ATA_TIMING_REC8B ) m->rec8b = max(a->rec8b, b->rec8b); 2556c6fd2807SJeff Garzik if (what & ATA_TIMING_CYC8B ) m->cyc8b = max(a->cyc8b, b->cyc8b); 2557c6fd2807SJeff Garzik if (what & ATA_TIMING_ACTIVE ) m->active = max(a->active, b->active); 2558c6fd2807SJeff Garzik if (what & ATA_TIMING_RECOVER) m->recover = max(a->recover, b->recover); 2559c6fd2807SJeff Garzik if (what & ATA_TIMING_CYCLE ) m->cycle = max(a->cycle, b->cycle); 2560c6fd2807SJeff Garzik if (what & ATA_TIMING_UDMA ) m->udma = max(a->udma, b->udma); 2561c6fd2807SJeff Garzik } 2562c6fd2807SJeff Garzik 2563c6fd2807SJeff Garzik static const struct ata_timing* ata_timing_find_mode(unsigned short speed) 2564c6fd2807SJeff Garzik { 2565c6fd2807SJeff Garzik const struct ata_timing *t; 2566c6fd2807SJeff Garzik 2567c6fd2807SJeff Garzik for (t = ata_timing; t->mode != speed; t++) 2568c6fd2807SJeff Garzik if (t->mode == 0xFF) 2569c6fd2807SJeff Garzik return NULL; 2570c6fd2807SJeff Garzik return t; 2571c6fd2807SJeff Garzik } 2572c6fd2807SJeff Garzik 2573c6fd2807SJeff Garzik int ata_timing_compute(struct ata_device *adev, unsigned short speed, 2574c6fd2807SJeff Garzik struct ata_timing *t, int T, int UT) 2575c6fd2807SJeff Garzik { 2576c6fd2807SJeff Garzik const struct ata_timing *s; 2577c6fd2807SJeff Garzik struct ata_timing p; 2578c6fd2807SJeff Garzik 2579c6fd2807SJeff Garzik /* 2580c6fd2807SJeff Garzik * Find the mode. 2581c6fd2807SJeff Garzik */ 2582c6fd2807SJeff Garzik 2583c6fd2807SJeff Garzik if (!(s = ata_timing_find_mode(speed))) 2584c6fd2807SJeff Garzik return -EINVAL; 2585c6fd2807SJeff Garzik 2586c6fd2807SJeff Garzik memcpy(t, s, sizeof(*s)); 2587c6fd2807SJeff Garzik 2588c6fd2807SJeff Garzik /* 2589c6fd2807SJeff Garzik * If the drive is an EIDE drive, it can tell us it needs extended 2590c6fd2807SJeff Garzik * PIO/MW_DMA cycle timing. 2591c6fd2807SJeff Garzik */ 2592c6fd2807SJeff Garzik 2593c6fd2807SJeff Garzik if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE drive */ 2594c6fd2807SJeff Garzik memset(&p, 0, sizeof(p)); 2595c6fd2807SJeff Garzik if(speed >= XFER_PIO_0 && speed <= XFER_SW_DMA_0) { 2596c6fd2807SJeff Garzik if (speed <= XFER_PIO_2) p.cycle = p.cyc8b = adev->id[ATA_ID_EIDE_PIO]; 2597c6fd2807SJeff Garzik else p.cycle = p.cyc8b = adev->id[ATA_ID_EIDE_PIO_IORDY]; 2598c6fd2807SJeff Garzik } else if(speed >= XFER_MW_DMA_0 && speed <= XFER_MW_DMA_2) { 2599c6fd2807SJeff Garzik p.cycle = adev->id[ATA_ID_EIDE_DMA_MIN]; 2600c6fd2807SJeff Garzik } 2601c6fd2807SJeff Garzik ata_timing_merge(&p, t, t, ATA_TIMING_CYCLE | ATA_TIMING_CYC8B); 2602c6fd2807SJeff Garzik } 2603c6fd2807SJeff Garzik 2604c6fd2807SJeff Garzik /* 2605c6fd2807SJeff Garzik * Convert the timing to bus clock counts. 2606c6fd2807SJeff Garzik */ 2607c6fd2807SJeff Garzik 2608c6fd2807SJeff Garzik ata_timing_quantize(t, t, T, UT); 2609c6fd2807SJeff Garzik 2610c6fd2807SJeff Garzik /* 2611c6fd2807SJeff Garzik * Even in DMA/UDMA modes we still use PIO access for IDENTIFY, 2612c6fd2807SJeff Garzik * S.M.A.R.T * and some other commands. We have to ensure that the 2613c6fd2807SJeff Garzik * DMA cycle timing is slower/equal than the fastest PIO timing. 2614c6fd2807SJeff Garzik */ 2615c6fd2807SJeff Garzik 2616fd3367afSAlan if (speed > XFER_PIO_6) { 2617c6fd2807SJeff Garzik ata_timing_compute(adev, adev->pio_mode, &p, T, UT); 2618c6fd2807SJeff Garzik ata_timing_merge(&p, t, t, ATA_TIMING_ALL); 2619c6fd2807SJeff Garzik } 2620c6fd2807SJeff Garzik 2621c6fd2807SJeff Garzik /* 2622c6fd2807SJeff Garzik * Lengthen active & recovery time so that cycle time is correct. 2623c6fd2807SJeff Garzik */ 2624c6fd2807SJeff Garzik 2625c6fd2807SJeff Garzik if (t->act8b + t->rec8b < t->cyc8b) { 2626c6fd2807SJeff Garzik t->act8b += (t->cyc8b - (t->act8b + t->rec8b)) / 2; 2627c6fd2807SJeff Garzik t->rec8b = t->cyc8b - t->act8b; 2628c6fd2807SJeff Garzik } 2629c6fd2807SJeff Garzik 2630c6fd2807SJeff Garzik if (t->active + t->recover < t->cycle) { 2631c6fd2807SJeff Garzik t->active += (t->cycle - (t->active + t->recover)) / 2; 2632c6fd2807SJeff Garzik t->recover = t->cycle - t->active; 2633c6fd2807SJeff Garzik } 26344f701d1eSAlan Cox 26354f701d1eSAlan Cox /* In a few cases quantisation may produce enough errors to 26364f701d1eSAlan Cox leave t->cycle too low for the sum of active and recovery 26374f701d1eSAlan Cox if so we must correct this */ 26384f701d1eSAlan Cox if (t->active + t->recover > t->cycle) 26394f701d1eSAlan Cox t->cycle = t->active + t->recover; 2640c6fd2807SJeff Garzik 2641c6fd2807SJeff Garzik return 0; 2642c6fd2807SJeff Garzik } 2643c6fd2807SJeff Garzik 2644c6fd2807SJeff Garzik /** 2645c6fd2807SJeff Garzik * ata_down_xfermask_limit - adjust dev xfer masks downward 2646c6fd2807SJeff Garzik * @dev: Device to adjust xfer masks 2647458337dbSTejun Heo * @sel: ATA_DNXFER_* selector 2648c6fd2807SJeff Garzik * 2649c6fd2807SJeff Garzik * Adjust xfer masks of @dev downward. Note that this function 2650c6fd2807SJeff Garzik * does not apply the change. Invoking ata_set_mode() afterwards 2651c6fd2807SJeff Garzik * will apply the limit. 2652c6fd2807SJeff Garzik * 2653c6fd2807SJeff Garzik * LOCKING: 2654c6fd2807SJeff Garzik * Inherited from caller. 2655c6fd2807SJeff Garzik * 2656c6fd2807SJeff Garzik * RETURNS: 2657c6fd2807SJeff Garzik * 0 on success, negative errno on failure 2658c6fd2807SJeff Garzik */ 2659458337dbSTejun Heo int ata_down_xfermask_limit(struct ata_device *dev, unsigned int sel) 2660c6fd2807SJeff Garzik { 2661458337dbSTejun Heo char buf[32]; 2662458337dbSTejun Heo unsigned int orig_mask, xfer_mask; 2663458337dbSTejun Heo unsigned int pio_mask, mwdma_mask, udma_mask; 2664458337dbSTejun Heo int quiet, highbit; 2665c6fd2807SJeff Garzik 2666458337dbSTejun Heo quiet = !!(sel & ATA_DNXFER_QUIET); 2667458337dbSTejun Heo sel &= ~ATA_DNXFER_QUIET; 2668458337dbSTejun Heo 2669458337dbSTejun Heo xfer_mask = orig_mask = ata_pack_xfermask(dev->pio_mask, 2670458337dbSTejun Heo dev->mwdma_mask, 2671c6fd2807SJeff Garzik dev->udma_mask); 2672458337dbSTejun Heo ata_unpack_xfermask(xfer_mask, &pio_mask, &mwdma_mask, &udma_mask); 2673c6fd2807SJeff Garzik 2674458337dbSTejun Heo switch (sel) { 2675458337dbSTejun Heo case ATA_DNXFER_PIO: 2676458337dbSTejun Heo highbit = fls(pio_mask) - 1; 2677458337dbSTejun Heo pio_mask &= ~(1 << highbit); 2678458337dbSTejun Heo break; 2679458337dbSTejun Heo 2680458337dbSTejun Heo case ATA_DNXFER_DMA: 2681458337dbSTejun Heo if (udma_mask) { 2682458337dbSTejun Heo highbit = fls(udma_mask) - 1; 2683458337dbSTejun Heo udma_mask &= ~(1 << highbit); 2684458337dbSTejun Heo if (!udma_mask) 2685458337dbSTejun Heo return -ENOENT; 2686458337dbSTejun Heo } else if (mwdma_mask) { 2687458337dbSTejun Heo highbit = fls(mwdma_mask) - 1; 2688458337dbSTejun Heo mwdma_mask &= ~(1 << highbit); 2689458337dbSTejun Heo if (!mwdma_mask) 2690458337dbSTejun Heo return -ENOENT; 2691458337dbSTejun Heo } 2692458337dbSTejun Heo break; 2693458337dbSTejun Heo 2694458337dbSTejun Heo case ATA_DNXFER_40C: 2695458337dbSTejun Heo udma_mask &= ATA_UDMA_MASK_40C; 2696458337dbSTejun Heo break; 2697458337dbSTejun Heo 2698458337dbSTejun Heo case ATA_DNXFER_FORCE_PIO0: 2699458337dbSTejun Heo pio_mask &= 1; 2700458337dbSTejun Heo case ATA_DNXFER_FORCE_PIO: 2701458337dbSTejun Heo mwdma_mask = 0; 2702458337dbSTejun Heo udma_mask = 0; 2703458337dbSTejun Heo break; 2704458337dbSTejun Heo 2705458337dbSTejun Heo default: 2706458337dbSTejun Heo BUG(); 2707458337dbSTejun Heo } 2708458337dbSTejun Heo 2709458337dbSTejun Heo xfer_mask &= ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask); 2710458337dbSTejun Heo 2711458337dbSTejun Heo if (!(xfer_mask & ATA_MASK_PIO) || xfer_mask == orig_mask) 2712458337dbSTejun Heo return -ENOENT; 2713458337dbSTejun Heo 2714458337dbSTejun Heo if (!quiet) { 2715458337dbSTejun Heo if (xfer_mask & (ATA_MASK_MWDMA | ATA_MASK_UDMA)) 2716458337dbSTejun Heo snprintf(buf, sizeof(buf), "%s:%s", 2717458337dbSTejun Heo ata_mode_string(xfer_mask), 2718458337dbSTejun Heo ata_mode_string(xfer_mask & ATA_MASK_PIO)); 2719458337dbSTejun Heo else 2720458337dbSTejun Heo snprintf(buf, sizeof(buf), "%s", 2721458337dbSTejun Heo ata_mode_string(xfer_mask)); 2722458337dbSTejun Heo 2723458337dbSTejun Heo ata_dev_printk(dev, KERN_WARNING, 2724458337dbSTejun Heo "limiting speed to %s\n", buf); 2725458337dbSTejun Heo } 2726c6fd2807SJeff Garzik 2727c6fd2807SJeff Garzik ata_unpack_xfermask(xfer_mask, &dev->pio_mask, &dev->mwdma_mask, 2728c6fd2807SJeff Garzik &dev->udma_mask); 2729c6fd2807SJeff Garzik 2730c6fd2807SJeff Garzik return 0; 2731c6fd2807SJeff Garzik } 2732c6fd2807SJeff Garzik 2733c6fd2807SJeff Garzik static int ata_dev_set_mode(struct ata_device *dev) 2734c6fd2807SJeff Garzik { 2735baa1e78aSTejun Heo struct ata_eh_context *ehc = &dev->ap->eh_context; 2736c6fd2807SJeff Garzik unsigned int err_mask; 2737c6fd2807SJeff Garzik int rc; 2738c6fd2807SJeff Garzik 2739c6fd2807SJeff Garzik dev->flags &= ~ATA_DFLAG_PIO; 2740c6fd2807SJeff Garzik if (dev->xfer_shift == ATA_SHIFT_PIO) 2741c6fd2807SJeff Garzik dev->flags |= ATA_DFLAG_PIO; 2742c6fd2807SJeff Garzik 2743c6fd2807SJeff Garzik err_mask = ata_dev_set_xfermode(dev); 274411750a40SAlan /* Old CFA may refuse this command, which is just fine */ 274511750a40SAlan if (dev->xfer_shift == ATA_SHIFT_PIO && ata_id_is_cfa(dev->id)) 274611750a40SAlan err_mask &= ~AC_ERR_DEV; 274711750a40SAlan 2748c6fd2807SJeff Garzik if (err_mask) { 2749c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_ERR, "failed to set xfermode " 2750c6fd2807SJeff Garzik "(err_mask=0x%x)\n", err_mask); 2751c6fd2807SJeff Garzik return -EIO; 2752c6fd2807SJeff Garzik } 2753c6fd2807SJeff Garzik 2754baa1e78aSTejun Heo ehc->i.flags |= ATA_EHI_POST_SETMODE; 2755c6fd2807SJeff Garzik rc = ata_dev_revalidate(dev, 0); 2756baa1e78aSTejun Heo ehc->i.flags &= ~ATA_EHI_POST_SETMODE; 2757c6fd2807SJeff Garzik if (rc) 2758c6fd2807SJeff Garzik return rc; 2759c6fd2807SJeff Garzik 2760c6fd2807SJeff Garzik DPRINTK("xfer_shift=%u, xfer_mode=0x%x\n", 2761c6fd2807SJeff Garzik dev->xfer_shift, (int)dev->xfer_mode); 2762c6fd2807SJeff Garzik 2763c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_INFO, "configured for %s\n", 2764c6fd2807SJeff Garzik ata_mode_string(ata_xfer_mode2mask(dev->xfer_mode))); 2765c6fd2807SJeff Garzik return 0; 2766c6fd2807SJeff Garzik } 2767c6fd2807SJeff Garzik 2768c6fd2807SJeff Garzik /** 276904351821SAlan * ata_do_set_mode - Program timings and issue SET FEATURES - XFER 2770c6fd2807SJeff Garzik * @ap: port on which timings will be programmed 2771c6fd2807SJeff Garzik * @r_failed_dev: out paramter for failed device 2772c6fd2807SJeff Garzik * 277304351821SAlan * Standard implementation of the function used to tune and set 277404351821SAlan * ATA device disk transfer mode (PIO3, UDMA6, etc.). If 277504351821SAlan * ata_dev_set_mode() fails, pointer to the failing device is 2776c6fd2807SJeff Garzik * returned in @r_failed_dev. 2777c6fd2807SJeff Garzik * 2778c6fd2807SJeff Garzik * LOCKING: 2779c6fd2807SJeff Garzik * PCI/etc. bus probe sem. 2780c6fd2807SJeff Garzik * 2781c6fd2807SJeff Garzik * RETURNS: 2782c6fd2807SJeff Garzik * 0 on success, negative errno otherwise 2783c6fd2807SJeff Garzik */ 278404351821SAlan 278504351821SAlan int ata_do_set_mode(struct ata_port *ap, struct ata_device **r_failed_dev) 2786c6fd2807SJeff Garzik { 2787c6fd2807SJeff Garzik struct ata_device *dev; 2788c6fd2807SJeff Garzik int i, rc = 0, used_dma = 0, found = 0; 2789c6fd2807SJeff Garzik 2790c6fd2807SJeff Garzik 2791c6fd2807SJeff Garzik /* step 1: calculate xfer_mask */ 2792c6fd2807SJeff Garzik for (i = 0; i < ATA_MAX_DEVICES; i++) { 2793c6fd2807SJeff Garzik unsigned int pio_mask, dma_mask; 2794c6fd2807SJeff Garzik 2795c6fd2807SJeff Garzik dev = &ap->device[i]; 2796c6fd2807SJeff Garzik 2797c6fd2807SJeff Garzik if (!ata_dev_enabled(dev)) 2798c6fd2807SJeff Garzik continue; 2799c6fd2807SJeff Garzik 2800c6fd2807SJeff Garzik ata_dev_xfermask(dev); 2801c6fd2807SJeff Garzik 2802c6fd2807SJeff Garzik pio_mask = ata_pack_xfermask(dev->pio_mask, 0, 0); 2803c6fd2807SJeff Garzik dma_mask = ata_pack_xfermask(0, dev->mwdma_mask, dev->udma_mask); 2804c6fd2807SJeff Garzik dev->pio_mode = ata_xfer_mask2mode(pio_mask); 2805c6fd2807SJeff Garzik dev->dma_mode = ata_xfer_mask2mode(dma_mask); 2806c6fd2807SJeff Garzik 2807c6fd2807SJeff Garzik found = 1; 2808c6fd2807SJeff Garzik if (dev->dma_mode) 2809c6fd2807SJeff Garzik used_dma = 1; 2810c6fd2807SJeff Garzik } 2811c6fd2807SJeff Garzik if (!found) 2812c6fd2807SJeff Garzik goto out; 2813c6fd2807SJeff Garzik 2814c6fd2807SJeff Garzik /* step 2: always set host PIO timings */ 2815c6fd2807SJeff Garzik for (i = 0; i < ATA_MAX_DEVICES; i++) { 2816c6fd2807SJeff Garzik dev = &ap->device[i]; 2817c6fd2807SJeff Garzik if (!ata_dev_enabled(dev)) 2818c6fd2807SJeff Garzik continue; 2819c6fd2807SJeff Garzik 2820c6fd2807SJeff Garzik if (!dev->pio_mode) { 2821c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_WARNING, "no PIO support\n"); 2822c6fd2807SJeff Garzik rc = -EINVAL; 2823c6fd2807SJeff Garzik goto out; 2824c6fd2807SJeff Garzik } 2825c6fd2807SJeff Garzik 2826c6fd2807SJeff Garzik dev->xfer_mode = dev->pio_mode; 2827c6fd2807SJeff Garzik dev->xfer_shift = ATA_SHIFT_PIO; 2828c6fd2807SJeff Garzik if (ap->ops->set_piomode) 2829c6fd2807SJeff Garzik ap->ops->set_piomode(ap, dev); 2830c6fd2807SJeff Garzik } 2831c6fd2807SJeff Garzik 2832c6fd2807SJeff Garzik /* step 3: set host DMA timings */ 2833c6fd2807SJeff Garzik for (i = 0; i < ATA_MAX_DEVICES; i++) { 2834c6fd2807SJeff Garzik dev = &ap->device[i]; 2835c6fd2807SJeff Garzik 2836c6fd2807SJeff Garzik if (!ata_dev_enabled(dev) || !dev->dma_mode) 2837c6fd2807SJeff Garzik continue; 2838c6fd2807SJeff Garzik 2839c6fd2807SJeff Garzik dev->xfer_mode = dev->dma_mode; 2840c6fd2807SJeff Garzik dev->xfer_shift = ata_xfer_mode2shift(dev->dma_mode); 2841c6fd2807SJeff Garzik if (ap->ops->set_dmamode) 2842c6fd2807SJeff Garzik ap->ops->set_dmamode(ap, dev); 2843c6fd2807SJeff Garzik } 2844c6fd2807SJeff Garzik 2845c6fd2807SJeff Garzik /* step 4: update devices' xfer mode */ 2846c6fd2807SJeff Garzik for (i = 0; i < ATA_MAX_DEVICES; i++) { 2847c6fd2807SJeff Garzik dev = &ap->device[i]; 2848c6fd2807SJeff Garzik 284918d90debSAlan /* don't update suspended devices' xfer mode */ 28509666f400STejun Heo if (!ata_dev_enabled(dev)) 2851c6fd2807SJeff Garzik continue; 2852c6fd2807SJeff Garzik 2853c6fd2807SJeff Garzik rc = ata_dev_set_mode(dev); 2854c6fd2807SJeff Garzik if (rc) 2855c6fd2807SJeff Garzik goto out; 2856c6fd2807SJeff Garzik } 2857c6fd2807SJeff Garzik 2858c6fd2807SJeff Garzik /* Record simplex status. If we selected DMA then the other 2859c6fd2807SJeff Garzik * host channels are not permitted to do so. 2860c6fd2807SJeff Garzik */ 2861cca3974eSJeff Garzik if (used_dma && (ap->host->flags & ATA_HOST_SIMPLEX)) 2862032af1ceSAlan ap->host->simplex_claimed = ap; 2863c6fd2807SJeff Garzik 2864c6fd2807SJeff Garzik out: 2865c6fd2807SJeff Garzik if (rc) 2866c6fd2807SJeff Garzik *r_failed_dev = dev; 2867c6fd2807SJeff Garzik return rc; 2868c6fd2807SJeff Garzik } 2869c6fd2807SJeff Garzik 2870c6fd2807SJeff Garzik /** 287104351821SAlan * ata_set_mode - Program timings and issue SET FEATURES - XFER 287204351821SAlan * @ap: port on which timings will be programmed 287304351821SAlan * @r_failed_dev: out paramter for failed device 287404351821SAlan * 287504351821SAlan * Set ATA device disk transfer mode (PIO3, UDMA6, etc.). If 287604351821SAlan * ata_set_mode() fails, pointer to the failing device is 287704351821SAlan * returned in @r_failed_dev. 287804351821SAlan * 287904351821SAlan * LOCKING: 288004351821SAlan * PCI/etc. bus probe sem. 288104351821SAlan * 288204351821SAlan * RETURNS: 288304351821SAlan * 0 on success, negative errno otherwise 288404351821SAlan */ 288504351821SAlan int ata_set_mode(struct ata_port *ap, struct ata_device **r_failed_dev) 288604351821SAlan { 288704351821SAlan /* has private set_mode? */ 288804351821SAlan if (ap->ops->set_mode) 288904351821SAlan return ap->ops->set_mode(ap, r_failed_dev); 289004351821SAlan return ata_do_set_mode(ap, r_failed_dev); 289104351821SAlan } 289204351821SAlan 289304351821SAlan /** 2894c6fd2807SJeff Garzik * ata_tf_to_host - issue ATA taskfile to host controller 2895c6fd2807SJeff Garzik * @ap: port to which command is being issued 2896c6fd2807SJeff Garzik * @tf: ATA taskfile register set 2897c6fd2807SJeff Garzik * 2898c6fd2807SJeff Garzik * Issues ATA taskfile register set to ATA host controller, 2899c6fd2807SJeff Garzik * with proper synchronization with interrupt handler and 2900c6fd2807SJeff Garzik * other threads. 2901c6fd2807SJeff Garzik * 2902c6fd2807SJeff Garzik * LOCKING: 2903cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 2904c6fd2807SJeff Garzik */ 2905c6fd2807SJeff Garzik 2906c6fd2807SJeff Garzik static inline void ata_tf_to_host(struct ata_port *ap, 2907c6fd2807SJeff Garzik const struct ata_taskfile *tf) 2908c6fd2807SJeff Garzik { 2909c6fd2807SJeff Garzik ap->ops->tf_load(ap, tf); 2910c6fd2807SJeff Garzik ap->ops->exec_command(ap, tf); 2911c6fd2807SJeff Garzik } 2912c6fd2807SJeff Garzik 2913c6fd2807SJeff Garzik /** 2914c6fd2807SJeff Garzik * ata_busy_sleep - sleep until BSY clears, or timeout 2915c6fd2807SJeff Garzik * @ap: port containing status register to be polled 2916c6fd2807SJeff Garzik * @tmout_pat: impatience timeout 2917c6fd2807SJeff Garzik * @tmout: overall timeout 2918c6fd2807SJeff Garzik * 2919c6fd2807SJeff Garzik * Sleep until ATA Status register bit BSY clears, 2920c6fd2807SJeff Garzik * or a timeout occurs. 2921c6fd2807SJeff Garzik * 2922d1adc1bbSTejun Heo * LOCKING: 2923d1adc1bbSTejun Heo * Kernel thread context (may sleep). 2924d1adc1bbSTejun Heo * 2925d1adc1bbSTejun Heo * RETURNS: 2926d1adc1bbSTejun Heo * 0 on success, -errno otherwise. 2927c6fd2807SJeff Garzik */ 2928d1adc1bbSTejun Heo int ata_busy_sleep(struct ata_port *ap, 2929c6fd2807SJeff Garzik unsigned long tmout_pat, unsigned long tmout) 2930c6fd2807SJeff Garzik { 2931c6fd2807SJeff Garzik unsigned long timer_start, timeout; 2932c6fd2807SJeff Garzik u8 status; 2933c6fd2807SJeff Garzik 2934c6fd2807SJeff Garzik status = ata_busy_wait(ap, ATA_BUSY, 300); 2935c6fd2807SJeff Garzik timer_start = jiffies; 2936c6fd2807SJeff Garzik timeout = timer_start + tmout_pat; 2937d1adc1bbSTejun Heo while (status != 0xff && (status & ATA_BUSY) && 2938d1adc1bbSTejun Heo time_before(jiffies, timeout)) { 2939c6fd2807SJeff Garzik msleep(50); 2940c6fd2807SJeff Garzik status = ata_busy_wait(ap, ATA_BUSY, 3); 2941c6fd2807SJeff Garzik } 2942c6fd2807SJeff Garzik 2943d1adc1bbSTejun Heo if (status != 0xff && (status & ATA_BUSY)) 2944c6fd2807SJeff Garzik ata_port_printk(ap, KERN_WARNING, 294535aa7a43SJeff Garzik "port is slow to respond, please be patient " 294635aa7a43SJeff Garzik "(Status 0x%x)\n", status); 2947c6fd2807SJeff Garzik 2948c6fd2807SJeff Garzik timeout = timer_start + tmout; 2949d1adc1bbSTejun Heo while (status != 0xff && (status & ATA_BUSY) && 2950d1adc1bbSTejun Heo time_before(jiffies, timeout)) { 2951c6fd2807SJeff Garzik msleep(50); 2952c6fd2807SJeff Garzik status = ata_chk_status(ap); 2953c6fd2807SJeff Garzik } 2954c6fd2807SJeff Garzik 2955d1adc1bbSTejun Heo if (status == 0xff) 2956d1adc1bbSTejun Heo return -ENODEV; 2957d1adc1bbSTejun Heo 2958c6fd2807SJeff Garzik if (status & ATA_BUSY) { 2959c6fd2807SJeff Garzik ata_port_printk(ap, KERN_ERR, "port failed to respond " 296035aa7a43SJeff Garzik "(%lu secs, Status 0x%x)\n", 296135aa7a43SJeff Garzik tmout / HZ, status); 2962d1adc1bbSTejun Heo return -EBUSY; 2963c6fd2807SJeff Garzik } 2964c6fd2807SJeff Garzik 2965c6fd2807SJeff Garzik return 0; 2966c6fd2807SJeff Garzik } 2967c6fd2807SJeff Garzik 2968d4b2bab4STejun Heo /** 2969d4b2bab4STejun Heo * ata_wait_ready - sleep until BSY clears, or timeout 2970d4b2bab4STejun Heo * @ap: port containing status register to be polled 2971d4b2bab4STejun Heo * @deadline: deadline jiffies for the operation 2972d4b2bab4STejun Heo * 2973d4b2bab4STejun Heo * Sleep until ATA Status register bit BSY clears, or timeout 2974d4b2bab4STejun Heo * occurs. 2975d4b2bab4STejun Heo * 2976d4b2bab4STejun Heo * LOCKING: 2977d4b2bab4STejun Heo * Kernel thread context (may sleep). 2978d4b2bab4STejun Heo * 2979d4b2bab4STejun Heo * RETURNS: 2980d4b2bab4STejun Heo * 0 on success, -errno otherwise. 2981d4b2bab4STejun Heo */ 2982d4b2bab4STejun Heo int ata_wait_ready(struct ata_port *ap, unsigned long deadline) 2983d4b2bab4STejun Heo { 2984d4b2bab4STejun Heo unsigned long start = jiffies; 2985d4b2bab4STejun Heo int warned = 0; 2986d4b2bab4STejun Heo 2987d4b2bab4STejun Heo while (1) { 2988d4b2bab4STejun Heo u8 status = ata_chk_status(ap); 2989d4b2bab4STejun Heo unsigned long now = jiffies; 2990d4b2bab4STejun Heo 2991d4b2bab4STejun Heo if (!(status & ATA_BUSY)) 2992d4b2bab4STejun Heo return 0; 2993fd7fe701STejun Heo if (!ata_port_online(ap) && status == 0xff) 2994d4b2bab4STejun Heo return -ENODEV; 2995d4b2bab4STejun Heo if (time_after(now, deadline)) 2996d4b2bab4STejun Heo return -EBUSY; 2997d4b2bab4STejun Heo 2998d4b2bab4STejun Heo if (!warned && time_after(now, start + 5 * HZ) && 2999d4b2bab4STejun Heo (deadline - now > 3 * HZ)) { 3000d4b2bab4STejun Heo ata_port_printk(ap, KERN_WARNING, 3001d4b2bab4STejun Heo "port is slow to respond, please be patient " 3002d4b2bab4STejun Heo "(Status 0x%x)\n", status); 3003d4b2bab4STejun Heo warned = 1; 3004d4b2bab4STejun Heo } 3005d4b2bab4STejun Heo 3006d4b2bab4STejun Heo msleep(50); 3007d4b2bab4STejun Heo } 3008d4b2bab4STejun Heo } 3009d4b2bab4STejun Heo 3010d4b2bab4STejun Heo static int ata_bus_post_reset(struct ata_port *ap, unsigned int devmask, 3011d4b2bab4STejun Heo unsigned long deadline) 3012c6fd2807SJeff Garzik { 3013c6fd2807SJeff Garzik struct ata_ioports *ioaddr = &ap->ioaddr; 3014c6fd2807SJeff Garzik unsigned int dev0 = devmask & (1 << 0); 3015c6fd2807SJeff Garzik unsigned int dev1 = devmask & (1 << 1); 30169b89391cSTejun Heo int rc, ret = 0; 3017c6fd2807SJeff Garzik 3018c6fd2807SJeff Garzik /* if device 0 was found in ata_devchk, wait for its 3019c6fd2807SJeff Garzik * BSY bit to clear 3020c6fd2807SJeff Garzik */ 3021d4b2bab4STejun Heo if (dev0) { 3022d4b2bab4STejun Heo rc = ata_wait_ready(ap, deadline); 30239b89391cSTejun Heo if (rc) { 30249b89391cSTejun Heo if (rc != -ENODEV) 3025d4b2bab4STejun Heo return rc; 30269b89391cSTejun Heo ret = rc; 30279b89391cSTejun Heo } 3028d4b2bab4STejun Heo } 3029c6fd2807SJeff Garzik 3030e141d999STejun Heo /* if device 1 was found in ata_devchk, wait for register 3031e141d999STejun Heo * access briefly, then wait for BSY to clear. 3032c6fd2807SJeff Garzik */ 3033e141d999STejun Heo if (dev1) { 3034e141d999STejun Heo int i; 3035c6fd2807SJeff Garzik 3036c6fd2807SJeff Garzik ap->ops->dev_select(ap, 1); 3037e141d999STejun Heo 3038e141d999STejun Heo /* Wait for register access. Some ATAPI devices fail 3039e141d999STejun Heo * to set nsect/lbal after reset, so don't waste too 3040e141d999STejun Heo * much time on it. We're gonna wait for !BSY anyway. 3041e141d999STejun Heo */ 3042e141d999STejun Heo for (i = 0; i < 2; i++) { 3043e141d999STejun Heo u8 nsect, lbal; 3044e141d999STejun Heo 30450d5ff566STejun Heo nsect = ioread8(ioaddr->nsect_addr); 30460d5ff566STejun Heo lbal = ioread8(ioaddr->lbal_addr); 3047c6fd2807SJeff Garzik if ((nsect == 1) && (lbal == 1)) 3048c6fd2807SJeff Garzik break; 3049c6fd2807SJeff Garzik msleep(50); /* give drive a breather */ 3050c6fd2807SJeff Garzik } 3051e141d999STejun Heo 3052d4b2bab4STejun Heo rc = ata_wait_ready(ap, deadline); 30539b89391cSTejun Heo if (rc) { 30549b89391cSTejun Heo if (rc != -ENODEV) 3055d4b2bab4STejun Heo return rc; 30569b89391cSTejun Heo ret = rc; 30579b89391cSTejun Heo } 3058d4b2bab4STejun Heo } 3059c6fd2807SJeff Garzik 3060c6fd2807SJeff Garzik /* is all this really necessary? */ 3061c6fd2807SJeff Garzik ap->ops->dev_select(ap, 0); 3062c6fd2807SJeff Garzik if (dev1) 3063c6fd2807SJeff Garzik ap->ops->dev_select(ap, 1); 3064c6fd2807SJeff Garzik if (dev0) 3065c6fd2807SJeff Garzik ap->ops->dev_select(ap, 0); 3066d4b2bab4STejun Heo 30679b89391cSTejun Heo return ret; 3068c6fd2807SJeff Garzik } 3069c6fd2807SJeff Garzik 3070d4b2bab4STejun Heo static int ata_bus_softreset(struct ata_port *ap, unsigned int devmask, 3071d4b2bab4STejun Heo unsigned long deadline) 3072c6fd2807SJeff Garzik { 3073c6fd2807SJeff Garzik struct ata_ioports *ioaddr = &ap->ioaddr; 3074c6fd2807SJeff Garzik 307544877b4eSTejun Heo DPRINTK("ata%u: bus reset via SRST\n", ap->print_id); 3076c6fd2807SJeff Garzik 3077c6fd2807SJeff Garzik /* software reset. causes dev0 to be selected */ 30780d5ff566STejun Heo iowrite8(ap->ctl, ioaddr->ctl_addr); 3079c6fd2807SJeff Garzik udelay(20); /* FIXME: flush */ 30800d5ff566STejun Heo iowrite8(ap->ctl | ATA_SRST, ioaddr->ctl_addr); 3081c6fd2807SJeff Garzik udelay(20); /* FIXME: flush */ 30820d5ff566STejun Heo iowrite8(ap->ctl, ioaddr->ctl_addr); 3083c6fd2807SJeff Garzik 3084c6fd2807SJeff Garzik /* spec mandates ">= 2ms" before checking status. 3085c6fd2807SJeff Garzik * We wait 150ms, because that was the magic delay used for 3086c6fd2807SJeff Garzik * ATAPI devices in Hale Landis's ATADRVR, for the period of time 3087c6fd2807SJeff Garzik * between when the ATA command register is written, and then 3088c6fd2807SJeff Garzik * status is checked. Because waiting for "a while" before 3089c6fd2807SJeff Garzik * checking status is fine, post SRST, we perform this magic 3090c6fd2807SJeff Garzik * delay here as well. 3091c6fd2807SJeff Garzik * 3092c6fd2807SJeff Garzik * Old drivers/ide uses the 2mS rule and then waits for ready 3093c6fd2807SJeff Garzik */ 3094c6fd2807SJeff Garzik msleep(150); 3095c6fd2807SJeff Garzik 3096c6fd2807SJeff Garzik /* Before we perform post reset processing we want to see if 3097c6fd2807SJeff Garzik * the bus shows 0xFF because the odd clown forgets the D7 3098c6fd2807SJeff Garzik * pulldown resistor. 3099c6fd2807SJeff Garzik */ 3100d1adc1bbSTejun Heo if (ata_check_status(ap) == 0xFF) 31019b89391cSTejun Heo return -ENODEV; 3102c6fd2807SJeff Garzik 3103d4b2bab4STejun Heo return ata_bus_post_reset(ap, devmask, deadline); 3104c6fd2807SJeff Garzik } 3105c6fd2807SJeff Garzik 3106c6fd2807SJeff Garzik /** 3107c6fd2807SJeff Garzik * ata_bus_reset - reset host port and associated ATA channel 3108c6fd2807SJeff Garzik * @ap: port to reset 3109c6fd2807SJeff Garzik * 3110c6fd2807SJeff Garzik * This is typically the first time we actually start issuing 3111c6fd2807SJeff Garzik * commands to the ATA channel. We wait for BSY to clear, then 3112c6fd2807SJeff Garzik * issue EXECUTE DEVICE DIAGNOSTIC command, polling for its 3113c6fd2807SJeff Garzik * result. Determine what devices, if any, are on the channel 3114c6fd2807SJeff Garzik * by looking at the device 0/1 error register. Look at the signature 3115c6fd2807SJeff Garzik * stored in each device's taskfile registers, to determine if 3116c6fd2807SJeff Garzik * the device is ATA or ATAPI. 3117c6fd2807SJeff Garzik * 3118c6fd2807SJeff Garzik * LOCKING: 3119c6fd2807SJeff Garzik * PCI/etc. bus probe sem. 3120cca3974eSJeff Garzik * Obtains host lock. 3121c6fd2807SJeff Garzik * 3122c6fd2807SJeff Garzik * SIDE EFFECTS: 3123c6fd2807SJeff Garzik * Sets ATA_FLAG_DISABLED if bus reset fails. 3124c6fd2807SJeff Garzik */ 3125c6fd2807SJeff Garzik 3126c6fd2807SJeff Garzik void ata_bus_reset(struct ata_port *ap) 3127c6fd2807SJeff Garzik { 3128c6fd2807SJeff Garzik struct ata_ioports *ioaddr = &ap->ioaddr; 3129c6fd2807SJeff Garzik unsigned int slave_possible = ap->flags & ATA_FLAG_SLAVE_POSS; 3130c6fd2807SJeff Garzik u8 err; 3131c6fd2807SJeff Garzik unsigned int dev0, dev1 = 0, devmask = 0; 31329b89391cSTejun Heo int rc; 3133c6fd2807SJeff Garzik 313444877b4eSTejun Heo DPRINTK("ENTER, host %u, port %u\n", ap->print_id, ap->port_no); 3135c6fd2807SJeff Garzik 3136c6fd2807SJeff Garzik /* determine if device 0/1 are present */ 3137c6fd2807SJeff Garzik if (ap->flags & ATA_FLAG_SATA_RESET) 3138c6fd2807SJeff Garzik dev0 = 1; 3139c6fd2807SJeff Garzik else { 3140c6fd2807SJeff Garzik dev0 = ata_devchk(ap, 0); 3141c6fd2807SJeff Garzik if (slave_possible) 3142c6fd2807SJeff Garzik dev1 = ata_devchk(ap, 1); 3143c6fd2807SJeff Garzik } 3144c6fd2807SJeff Garzik 3145c6fd2807SJeff Garzik if (dev0) 3146c6fd2807SJeff Garzik devmask |= (1 << 0); 3147c6fd2807SJeff Garzik if (dev1) 3148c6fd2807SJeff Garzik devmask |= (1 << 1); 3149c6fd2807SJeff Garzik 3150c6fd2807SJeff Garzik /* select device 0 again */ 3151c6fd2807SJeff Garzik ap->ops->dev_select(ap, 0); 3152c6fd2807SJeff Garzik 3153c6fd2807SJeff Garzik /* issue bus reset */ 31549b89391cSTejun Heo if (ap->flags & ATA_FLAG_SRST) { 31559b89391cSTejun Heo rc = ata_bus_softreset(ap, devmask, jiffies + 40 * HZ); 31569b89391cSTejun Heo if (rc && rc != -ENODEV) 3157c6fd2807SJeff Garzik goto err_out; 31589b89391cSTejun Heo } 3159c6fd2807SJeff Garzik 3160c6fd2807SJeff Garzik /* 3161c6fd2807SJeff Garzik * determine by signature whether we have ATA or ATAPI devices 3162c6fd2807SJeff Garzik */ 3163c6fd2807SJeff Garzik ap->device[0].class = ata_dev_try_classify(ap, 0, &err); 3164c6fd2807SJeff Garzik if ((slave_possible) && (err != 0x81)) 3165c6fd2807SJeff Garzik ap->device[1].class = ata_dev_try_classify(ap, 1, &err); 3166c6fd2807SJeff Garzik 3167c6fd2807SJeff Garzik /* re-enable interrupts */ 316883625006SAkira Iguchi ap->ops->irq_on(ap); 3169c6fd2807SJeff Garzik 3170c6fd2807SJeff Garzik /* is double-select really necessary? */ 3171c6fd2807SJeff Garzik if (ap->device[1].class != ATA_DEV_NONE) 3172c6fd2807SJeff Garzik ap->ops->dev_select(ap, 1); 3173c6fd2807SJeff Garzik if (ap->device[0].class != ATA_DEV_NONE) 3174c6fd2807SJeff Garzik ap->ops->dev_select(ap, 0); 3175c6fd2807SJeff Garzik 3176c6fd2807SJeff Garzik /* if no devices were detected, disable this port */ 3177c6fd2807SJeff Garzik if ((ap->device[0].class == ATA_DEV_NONE) && 3178c6fd2807SJeff Garzik (ap->device[1].class == ATA_DEV_NONE)) 3179c6fd2807SJeff Garzik goto err_out; 3180c6fd2807SJeff Garzik 3181c6fd2807SJeff Garzik if (ap->flags & (ATA_FLAG_SATA_RESET | ATA_FLAG_SRST)) { 3182c6fd2807SJeff Garzik /* set up device control for ATA_FLAG_SATA_RESET */ 31830d5ff566STejun Heo iowrite8(ap->ctl, ioaddr->ctl_addr); 3184c6fd2807SJeff Garzik } 3185c6fd2807SJeff Garzik 3186c6fd2807SJeff Garzik DPRINTK("EXIT\n"); 3187c6fd2807SJeff Garzik return; 3188c6fd2807SJeff Garzik 3189c6fd2807SJeff Garzik err_out: 3190c6fd2807SJeff Garzik ata_port_printk(ap, KERN_ERR, "disabling port\n"); 3191c6fd2807SJeff Garzik ap->ops->port_disable(ap); 3192c6fd2807SJeff Garzik 3193c6fd2807SJeff Garzik DPRINTK("EXIT\n"); 3194c6fd2807SJeff Garzik } 3195c6fd2807SJeff Garzik 3196c6fd2807SJeff Garzik /** 3197c6fd2807SJeff Garzik * sata_phy_debounce - debounce SATA phy status 3198c6fd2807SJeff Garzik * @ap: ATA port to debounce SATA phy status for 3199c6fd2807SJeff Garzik * @params: timing parameters { interval, duratinon, timeout } in msec 3200d4b2bab4STejun Heo * @deadline: deadline jiffies for the operation 3201c6fd2807SJeff Garzik * 3202c6fd2807SJeff Garzik * Make sure SStatus of @ap reaches stable state, determined by 3203c6fd2807SJeff Garzik * holding the same value where DET is not 1 for @duration polled 3204c6fd2807SJeff Garzik * every @interval, before @timeout. Timeout constraints the 3205d4b2bab4STejun Heo * beginning of the stable state. Because DET gets stuck at 1 on 3206d4b2bab4STejun Heo * some controllers after hot unplugging, this functions waits 3207c6fd2807SJeff Garzik * until timeout then returns 0 if DET is stable at 1. 3208c6fd2807SJeff Garzik * 3209d4b2bab4STejun Heo * @timeout is further limited by @deadline. The sooner of the 3210d4b2bab4STejun Heo * two is used. 3211d4b2bab4STejun Heo * 3212c6fd2807SJeff Garzik * LOCKING: 3213c6fd2807SJeff Garzik * Kernel thread context (may sleep) 3214c6fd2807SJeff Garzik * 3215c6fd2807SJeff Garzik * RETURNS: 3216c6fd2807SJeff Garzik * 0 on success, -errno on failure. 3217c6fd2807SJeff Garzik */ 3218d4b2bab4STejun Heo int sata_phy_debounce(struct ata_port *ap, const unsigned long *params, 3219d4b2bab4STejun Heo unsigned long deadline) 3220c6fd2807SJeff Garzik { 3221c6fd2807SJeff Garzik unsigned long interval_msec = params[0]; 3222d4b2bab4STejun Heo unsigned long duration = msecs_to_jiffies(params[1]); 3223d4b2bab4STejun Heo unsigned long last_jiffies, t; 3224c6fd2807SJeff Garzik u32 last, cur; 3225c6fd2807SJeff Garzik int rc; 3226c6fd2807SJeff Garzik 3227d4b2bab4STejun Heo t = jiffies + msecs_to_jiffies(params[2]); 3228d4b2bab4STejun Heo if (time_before(t, deadline)) 3229d4b2bab4STejun Heo deadline = t; 3230d4b2bab4STejun Heo 3231c6fd2807SJeff Garzik if ((rc = sata_scr_read(ap, SCR_STATUS, &cur))) 3232c6fd2807SJeff Garzik return rc; 3233c6fd2807SJeff Garzik cur &= 0xf; 3234c6fd2807SJeff Garzik 3235c6fd2807SJeff Garzik last = cur; 3236c6fd2807SJeff Garzik last_jiffies = jiffies; 3237c6fd2807SJeff Garzik 3238c6fd2807SJeff Garzik while (1) { 3239c6fd2807SJeff Garzik msleep(interval_msec); 3240c6fd2807SJeff Garzik if ((rc = sata_scr_read(ap, SCR_STATUS, &cur))) 3241c6fd2807SJeff Garzik return rc; 3242c6fd2807SJeff Garzik cur &= 0xf; 3243c6fd2807SJeff Garzik 3244c6fd2807SJeff Garzik /* DET stable? */ 3245c6fd2807SJeff Garzik if (cur == last) { 3246d4b2bab4STejun Heo if (cur == 1 && time_before(jiffies, deadline)) 3247c6fd2807SJeff Garzik continue; 3248c6fd2807SJeff Garzik if (time_after(jiffies, last_jiffies + duration)) 3249c6fd2807SJeff Garzik return 0; 3250c6fd2807SJeff Garzik continue; 3251c6fd2807SJeff Garzik } 3252c6fd2807SJeff Garzik 3253c6fd2807SJeff Garzik /* unstable, start over */ 3254c6fd2807SJeff Garzik last = cur; 3255c6fd2807SJeff Garzik last_jiffies = jiffies; 3256c6fd2807SJeff Garzik 3257d4b2bab4STejun Heo /* check deadline */ 3258d4b2bab4STejun Heo if (time_after(jiffies, deadline)) 3259c6fd2807SJeff Garzik return -EBUSY; 3260c6fd2807SJeff Garzik } 3261c6fd2807SJeff Garzik } 3262c6fd2807SJeff Garzik 3263c6fd2807SJeff Garzik /** 3264c6fd2807SJeff Garzik * sata_phy_resume - resume SATA phy 3265c6fd2807SJeff Garzik * @ap: ATA port to resume SATA phy for 3266c6fd2807SJeff Garzik * @params: timing parameters { interval, duratinon, timeout } in msec 3267d4b2bab4STejun Heo * @deadline: deadline jiffies for the operation 3268c6fd2807SJeff Garzik * 3269c6fd2807SJeff Garzik * Resume SATA phy of @ap and debounce it. 3270c6fd2807SJeff Garzik * 3271c6fd2807SJeff Garzik * LOCKING: 3272c6fd2807SJeff Garzik * Kernel thread context (may sleep) 3273c6fd2807SJeff Garzik * 3274c6fd2807SJeff Garzik * RETURNS: 3275c6fd2807SJeff Garzik * 0 on success, -errno on failure. 3276c6fd2807SJeff Garzik */ 3277d4b2bab4STejun Heo int sata_phy_resume(struct ata_port *ap, const unsigned long *params, 3278d4b2bab4STejun Heo unsigned long deadline) 3279c6fd2807SJeff Garzik { 3280c6fd2807SJeff Garzik u32 scontrol; 3281c6fd2807SJeff Garzik int rc; 3282c6fd2807SJeff Garzik 3283c6fd2807SJeff Garzik if ((rc = sata_scr_read(ap, SCR_CONTROL, &scontrol))) 3284c6fd2807SJeff Garzik return rc; 3285c6fd2807SJeff Garzik 3286c6fd2807SJeff Garzik scontrol = (scontrol & 0x0f0) | 0x300; 3287c6fd2807SJeff Garzik 3288c6fd2807SJeff Garzik if ((rc = sata_scr_write(ap, SCR_CONTROL, scontrol))) 3289c6fd2807SJeff Garzik return rc; 3290c6fd2807SJeff Garzik 3291c6fd2807SJeff Garzik /* Some PHYs react badly if SStatus is pounded immediately 3292c6fd2807SJeff Garzik * after resuming. Delay 200ms before debouncing. 3293c6fd2807SJeff Garzik */ 3294c6fd2807SJeff Garzik msleep(200); 3295c6fd2807SJeff Garzik 3296d4b2bab4STejun Heo return sata_phy_debounce(ap, params, deadline); 3297c6fd2807SJeff Garzik } 3298c6fd2807SJeff Garzik 3299c6fd2807SJeff Garzik /** 3300c6fd2807SJeff Garzik * ata_std_prereset - prepare for reset 3301c6fd2807SJeff Garzik * @ap: ATA port to be reset 3302d4b2bab4STejun Heo * @deadline: deadline jiffies for the operation 3303c6fd2807SJeff Garzik * 3304b8cffc6aSTejun Heo * @ap is about to be reset. Initialize it. Failure from 3305b8cffc6aSTejun Heo * prereset makes libata abort whole reset sequence and give up 3306b8cffc6aSTejun Heo * that port, so prereset should be best-effort. It does its 3307b8cffc6aSTejun Heo * best to prepare for reset sequence but if things go wrong, it 3308b8cffc6aSTejun Heo * should just whine, not fail. 3309c6fd2807SJeff Garzik * 3310c6fd2807SJeff Garzik * LOCKING: 3311c6fd2807SJeff Garzik * Kernel thread context (may sleep) 3312c6fd2807SJeff Garzik * 3313c6fd2807SJeff Garzik * RETURNS: 3314c6fd2807SJeff Garzik * 0 on success, -errno otherwise. 3315c6fd2807SJeff Garzik */ 3316d4b2bab4STejun Heo int ata_std_prereset(struct ata_port *ap, unsigned long deadline) 3317c6fd2807SJeff Garzik { 3318c6fd2807SJeff Garzik struct ata_eh_context *ehc = &ap->eh_context; 3319c6fd2807SJeff Garzik const unsigned long *timing = sata_ehc_deb_timing(ehc); 3320c6fd2807SJeff Garzik int rc; 3321c6fd2807SJeff Garzik 332231daabdaSTejun Heo /* handle link resume */ 3323c6fd2807SJeff Garzik if ((ehc->i.flags & ATA_EHI_RESUME_LINK) && 3324c6fd2807SJeff Garzik (ap->flags & ATA_FLAG_HRST_TO_RESUME)) 3325c6fd2807SJeff Garzik ehc->i.action |= ATA_EH_HARDRESET; 3326c6fd2807SJeff Garzik 3327c6fd2807SJeff Garzik /* if we're about to do hardreset, nothing more to do */ 3328c6fd2807SJeff Garzik if (ehc->i.action & ATA_EH_HARDRESET) 3329c6fd2807SJeff Garzik return 0; 3330c6fd2807SJeff Garzik 3331c6fd2807SJeff Garzik /* if SATA, resume phy */ 3332a16abc0bSTejun Heo if (ap->flags & ATA_FLAG_SATA) { 3333d4b2bab4STejun Heo rc = sata_phy_resume(ap, timing, deadline); 3334b8cffc6aSTejun Heo /* whine about phy resume failure but proceed */ 3335b8cffc6aSTejun Heo if (rc && rc != -EOPNOTSUPP) 3336c6fd2807SJeff Garzik ata_port_printk(ap, KERN_WARNING, "failed to resume " 3337c6fd2807SJeff Garzik "link for reset (errno=%d)\n", rc); 3338c6fd2807SJeff Garzik } 3339c6fd2807SJeff Garzik 3340c6fd2807SJeff Garzik /* Wait for !BSY if the controller can wait for the first D2H 3341c6fd2807SJeff Garzik * Reg FIS and we don't know that no device is attached. 3342c6fd2807SJeff Garzik */ 3343b8cffc6aSTejun Heo if (!(ap->flags & ATA_FLAG_SKIP_D2H_BSY) && !ata_port_offline(ap)) { 3344b8cffc6aSTejun Heo rc = ata_wait_ready(ap, deadline); 33456dffaf61STejun Heo if (rc && rc != -ENODEV) { 3346b8cffc6aSTejun Heo ata_port_printk(ap, KERN_WARNING, "device not ready " 3347b8cffc6aSTejun Heo "(errno=%d), forcing hardreset\n", rc); 3348b8cffc6aSTejun Heo ehc->i.action |= ATA_EH_HARDRESET; 3349b8cffc6aSTejun Heo } 3350b8cffc6aSTejun Heo } 3351c6fd2807SJeff Garzik 3352c6fd2807SJeff Garzik return 0; 3353c6fd2807SJeff Garzik } 3354c6fd2807SJeff Garzik 3355c6fd2807SJeff Garzik /** 3356c6fd2807SJeff Garzik * ata_std_softreset - reset host port via ATA SRST 3357c6fd2807SJeff Garzik * @ap: port to reset 3358c6fd2807SJeff Garzik * @classes: resulting classes of attached devices 3359d4b2bab4STejun Heo * @deadline: deadline jiffies for the operation 3360c6fd2807SJeff Garzik * 3361c6fd2807SJeff Garzik * Reset host port using ATA SRST. 3362c6fd2807SJeff Garzik * 3363c6fd2807SJeff Garzik * LOCKING: 3364c6fd2807SJeff Garzik * Kernel thread context (may sleep) 3365c6fd2807SJeff Garzik * 3366c6fd2807SJeff Garzik * RETURNS: 3367c6fd2807SJeff Garzik * 0 on success, -errno otherwise. 3368c6fd2807SJeff Garzik */ 3369d4b2bab4STejun Heo int ata_std_softreset(struct ata_port *ap, unsigned int *classes, 3370d4b2bab4STejun Heo unsigned long deadline) 3371c6fd2807SJeff Garzik { 3372c6fd2807SJeff Garzik unsigned int slave_possible = ap->flags & ATA_FLAG_SLAVE_POSS; 3373d4b2bab4STejun Heo unsigned int devmask = 0; 3374d4b2bab4STejun Heo int rc; 3375c6fd2807SJeff Garzik u8 err; 3376c6fd2807SJeff Garzik 3377c6fd2807SJeff Garzik DPRINTK("ENTER\n"); 3378c6fd2807SJeff Garzik 3379c6fd2807SJeff Garzik if (ata_port_offline(ap)) { 3380c6fd2807SJeff Garzik classes[0] = ATA_DEV_NONE; 3381c6fd2807SJeff Garzik goto out; 3382c6fd2807SJeff Garzik } 3383c6fd2807SJeff Garzik 3384c6fd2807SJeff Garzik /* determine if device 0/1 are present */ 3385c6fd2807SJeff Garzik if (ata_devchk(ap, 0)) 3386c6fd2807SJeff Garzik devmask |= (1 << 0); 3387c6fd2807SJeff Garzik if (slave_possible && ata_devchk(ap, 1)) 3388c6fd2807SJeff Garzik devmask |= (1 << 1); 3389c6fd2807SJeff Garzik 3390c6fd2807SJeff Garzik /* select device 0 again */ 3391c6fd2807SJeff Garzik ap->ops->dev_select(ap, 0); 3392c6fd2807SJeff Garzik 3393c6fd2807SJeff Garzik /* issue bus reset */ 3394c6fd2807SJeff Garzik DPRINTK("about to softreset, devmask=%x\n", devmask); 3395d4b2bab4STejun Heo rc = ata_bus_softreset(ap, devmask, deadline); 33969b89391cSTejun Heo /* if link is occupied, -ENODEV too is an error */ 33979b89391cSTejun Heo if (rc && (rc != -ENODEV || sata_scr_valid(ap))) { 3398d4b2bab4STejun Heo ata_port_printk(ap, KERN_ERR, "SRST failed (errno=%d)\n", rc); 3399d4b2bab4STejun Heo return rc; 3400c6fd2807SJeff Garzik } 3401c6fd2807SJeff Garzik 3402c6fd2807SJeff Garzik /* determine by signature whether we have ATA or ATAPI devices */ 3403c6fd2807SJeff Garzik classes[0] = ata_dev_try_classify(ap, 0, &err); 3404c6fd2807SJeff Garzik if (slave_possible && err != 0x81) 3405c6fd2807SJeff Garzik classes[1] = ata_dev_try_classify(ap, 1, &err); 3406c6fd2807SJeff Garzik 3407c6fd2807SJeff Garzik out: 3408c6fd2807SJeff Garzik DPRINTK("EXIT, classes[0]=%u [1]=%u\n", classes[0], classes[1]); 3409c6fd2807SJeff Garzik return 0; 3410c6fd2807SJeff Garzik } 3411c6fd2807SJeff Garzik 3412c6fd2807SJeff Garzik /** 3413b6103f6dSTejun Heo * sata_port_hardreset - reset port via SATA phy reset 3414c6fd2807SJeff Garzik * @ap: port to reset 3415b6103f6dSTejun Heo * @timing: timing parameters { interval, duratinon, timeout } in msec 3416d4b2bab4STejun Heo * @deadline: deadline jiffies for the operation 3417c6fd2807SJeff Garzik * 3418c6fd2807SJeff Garzik * SATA phy-reset host port using DET bits of SControl register. 3419c6fd2807SJeff Garzik * 3420c6fd2807SJeff Garzik * LOCKING: 3421c6fd2807SJeff Garzik * Kernel thread context (may sleep) 3422c6fd2807SJeff Garzik * 3423c6fd2807SJeff Garzik * RETURNS: 3424c6fd2807SJeff Garzik * 0 on success, -errno otherwise. 3425c6fd2807SJeff Garzik */ 3426d4b2bab4STejun Heo int sata_port_hardreset(struct ata_port *ap, const unsigned long *timing, 3427d4b2bab4STejun Heo unsigned long deadline) 3428c6fd2807SJeff Garzik { 3429c6fd2807SJeff Garzik u32 scontrol; 3430c6fd2807SJeff Garzik int rc; 3431c6fd2807SJeff Garzik 3432c6fd2807SJeff Garzik DPRINTK("ENTER\n"); 3433c6fd2807SJeff Garzik 3434c6fd2807SJeff Garzik if (sata_set_spd_needed(ap)) { 3435c6fd2807SJeff Garzik /* SATA spec says nothing about how to reconfigure 3436c6fd2807SJeff Garzik * spd. To be on the safe side, turn off phy during 3437c6fd2807SJeff Garzik * reconfiguration. This works for at least ICH7 AHCI 3438c6fd2807SJeff Garzik * and Sil3124. 3439c6fd2807SJeff Garzik */ 3440c6fd2807SJeff Garzik if ((rc = sata_scr_read(ap, SCR_CONTROL, &scontrol))) 3441b6103f6dSTejun Heo goto out; 3442c6fd2807SJeff Garzik 3443cea0d336SJeff Garzik scontrol = (scontrol & 0x0f0) | 0x304; 3444c6fd2807SJeff Garzik 3445c6fd2807SJeff Garzik if ((rc = sata_scr_write(ap, SCR_CONTROL, scontrol))) 3446b6103f6dSTejun Heo goto out; 3447c6fd2807SJeff Garzik 3448c6fd2807SJeff Garzik sata_set_spd(ap); 3449c6fd2807SJeff Garzik } 3450c6fd2807SJeff Garzik 3451c6fd2807SJeff Garzik /* issue phy wake/reset */ 3452c6fd2807SJeff Garzik if ((rc = sata_scr_read(ap, SCR_CONTROL, &scontrol))) 3453b6103f6dSTejun Heo goto out; 3454c6fd2807SJeff Garzik 3455c6fd2807SJeff Garzik scontrol = (scontrol & 0x0f0) | 0x301; 3456c6fd2807SJeff Garzik 3457c6fd2807SJeff Garzik if ((rc = sata_scr_write_flush(ap, SCR_CONTROL, scontrol))) 3458b6103f6dSTejun Heo goto out; 3459c6fd2807SJeff Garzik 3460c6fd2807SJeff Garzik /* Couldn't find anything in SATA I/II specs, but AHCI-1.1 3461c6fd2807SJeff Garzik * 10.4.2 says at least 1 ms. 3462c6fd2807SJeff Garzik */ 3463c6fd2807SJeff Garzik msleep(1); 3464c6fd2807SJeff Garzik 3465c6fd2807SJeff Garzik /* bring phy back */ 3466d4b2bab4STejun Heo rc = sata_phy_resume(ap, timing, deadline); 3467b6103f6dSTejun Heo out: 3468b6103f6dSTejun Heo DPRINTK("EXIT, rc=%d\n", rc); 3469b6103f6dSTejun Heo return rc; 3470b6103f6dSTejun Heo } 3471b6103f6dSTejun Heo 3472b6103f6dSTejun Heo /** 3473b6103f6dSTejun Heo * sata_std_hardreset - reset host port via SATA phy reset 3474b6103f6dSTejun Heo * @ap: port to reset 3475b6103f6dSTejun Heo * @class: resulting class of attached device 3476d4b2bab4STejun Heo * @deadline: deadline jiffies for the operation 3477b6103f6dSTejun Heo * 3478b6103f6dSTejun Heo * SATA phy-reset host port using DET bits of SControl register, 3479b6103f6dSTejun Heo * wait for !BSY and classify the attached device. 3480b6103f6dSTejun Heo * 3481b6103f6dSTejun Heo * LOCKING: 3482b6103f6dSTejun Heo * Kernel thread context (may sleep) 3483b6103f6dSTejun Heo * 3484b6103f6dSTejun Heo * RETURNS: 3485b6103f6dSTejun Heo * 0 on success, -errno otherwise. 3486b6103f6dSTejun Heo */ 3487d4b2bab4STejun Heo int sata_std_hardreset(struct ata_port *ap, unsigned int *class, 3488d4b2bab4STejun Heo unsigned long deadline) 3489b6103f6dSTejun Heo { 3490b6103f6dSTejun Heo const unsigned long *timing = sata_ehc_deb_timing(&ap->eh_context); 3491b6103f6dSTejun Heo int rc; 3492b6103f6dSTejun Heo 3493b6103f6dSTejun Heo DPRINTK("ENTER\n"); 3494b6103f6dSTejun Heo 3495b6103f6dSTejun Heo /* do hardreset */ 3496d4b2bab4STejun Heo rc = sata_port_hardreset(ap, timing, deadline); 3497b6103f6dSTejun Heo if (rc) { 3498b6103f6dSTejun Heo ata_port_printk(ap, KERN_ERR, 3499b6103f6dSTejun Heo "COMRESET failed (errno=%d)\n", rc); 3500b6103f6dSTejun Heo return rc; 3501b6103f6dSTejun Heo } 3502c6fd2807SJeff Garzik 3503c6fd2807SJeff Garzik /* TODO: phy layer with polling, timeouts, etc. */ 3504c6fd2807SJeff Garzik if (ata_port_offline(ap)) { 3505c6fd2807SJeff Garzik *class = ATA_DEV_NONE; 3506c6fd2807SJeff Garzik DPRINTK("EXIT, link offline\n"); 3507c6fd2807SJeff Garzik return 0; 3508c6fd2807SJeff Garzik } 3509c6fd2807SJeff Garzik 351034fee227STejun Heo /* wait a while before checking status, see SRST for more info */ 351134fee227STejun Heo msleep(150); 351234fee227STejun Heo 3513d4b2bab4STejun Heo rc = ata_wait_ready(ap, deadline); 35149b89391cSTejun Heo /* link occupied, -ENODEV too is an error */ 35159b89391cSTejun Heo if (rc) { 3516c6fd2807SJeff Garzik ata_port_printk(ap, KERN_ERR, 3517d4b2bab4STejun Heo "COMRESET failed (errno=%d)\n", rc); 3518d4b2bab4STejun Heo return rc; 3519c6fd2807SJeff Garzik } 3520c6fd2807SJeff Garzik 3521c6fd2807SJeff Garzik ap->ops->dev_select(ap, 0); /* probably unnecessary */ 3522c6fd2807SJeff Garzik 3523c6fd2807SJeff Garzik *class = ata_dev_try_classify(ap, 0, NULL); 3524c6fd2807SJeff Garzik 3525c6fd2807SJeff Garzik DPRINTK("EXIT, class=%u\n", *class); 3526c6fd2807SJeff Garzik return 0; 3527c6fd2807SJeff Garzik } 3528c6fd2807SJeff Garzik 3529c6fd2807SJeff Garzik /** 3530c6fd2807SJeff Garzik * ata_std_postreset - standard postreset callback 3531c6fd2807SJeff Garzik * @ap: the target ata_port 3532c6fd2807SJeff Garzik * @classes: classes of attached devices 3533c6fd2807SJeff Garzik * 3534c6fd2807SJeff Garzik * This function is invoked after a successful reset. Note that 3535c6fd2807SJeff Garzik * the device might have been reset more than once using 3536c6fd2807SJeff Garzik * different reset methods before postreset is invoked. 3537c6fd2807SJeff Garzik * 3538c6fd2807SJeff Garzik * LOCKING: 3539c6fd2807SJeff Garzik * Kernel thread context (may sleep) 3540c6fd2807SJeff Garzik */ 3541c6fd2807SJeff Garzik void ata_std_postreset(struct ata_port *ap, unsigned int *classes) 3542c6fd2807SJeff Garzik { 3543c6fd2807SJeff Garzik u32 serror; 3544c6fd2807SJeff Garzik 3545c6fd2807SJeff Garzik DPRINTK("ENTER\n"); 3546c6fd2807SJeff Garzik 3547c6fd2807SJeff Garzik /* print link status */ 3548c6fd2807SJeff Garzik sata_print_link_status(ap); 3549c6fd2807SJeff Garzik 3550c6fd2807SJeff Garzik /* clear SError */ 3551c6fd2807SJeff Garzik if (sata_scr_read(ap, SCR_ERROR, &serror) == 0) 3552c6fd2807SJeff Garzik sata_scr_write(ap, SCR_ERROR, serror); 3553c6fd2807SJeff Garzik 3554c6fd2807SJeff Garzik /* re-enable interrupts */ 355583625006SAkira Iguchi if (!ap->ops->error_handler) 355683625006SAkira Iguchi ap->ops->irq_on(ap); 3557c6fd2807SJeff Garzik 3558c6fd2807SJeff Garzik /* is double-select really necessary? */ 3559c6fd2807SJeff Garzik if (classes[0] != ATA_DEV_NONE) 3560c6fd2807SJeff Garzik ap->ops->dev_select(ap, 1); 3561c6fd2807SJeff Garzik if (classes[1] != ATA_DEV_NONE) 3562c6fd2807SJeff Garzik ap->ops->dev_select(ap, 0); 3563c6fd2807SJeff Garzik 3564c6fd2807SJeff Garzik /* bail out if no device is present */ 3565c6fd2807SJeff Garzik if (classes[0] == ATA_DEV_NONE && classes[1] == ATA_DEV_NONE) { 3566c6fd2807SJeff Garzik DPRINTK("EXIT, no device\n"); 3567c6fd2807SJeff Garzik return; 3568c6fd2807SJeff Garzik } 3569c6fd2807SJeff Garzik 3570c6fd2807SJeff Garzik /* set up device control */ 35710d5ff566STejun Heo if (ap->ioaddr.ctl_addr) 35720d5ff566STejun Heo iowrite8(ap->ctl, ap->ioaddr.ctl_addr); 3573c6fd2807SJeff Garzik 3574c6fd2807SJeff Garzik DPRINTK("EXIT\n"); 3575c6fd2807SJeff Garzik } 3576c6fd2807SJeff Garzik 3577c6fd2807SJeff Garzik /** 3578c6fd2807SJeff Garzik * ata_dev_same_device - Determine whether new ID matches configured device 3579c6fd2807SJeff Garzik * @dev: device to compare against 3580c6fd2807SJeff Garzik * @new_class: class of the new device 3581c6fd2807SJeff Garzik * @new_id: IDENTIFY page of the new device 3582c6fd2807SJeff Garzik * 3583c6fd2807SJeff Garzik * Compare @new_class and @new_id against @dev and determine 3584c6fd2807SJeff Garzik * whether @dev is the device indicated by @new_class and 3585c6fd2807SJeff Garzik * @new_id. 3586c6fd2807SJeff Garzik * 3587c6fd2807SJeff Garzik * LOCKING: 3588c6fd2807SJeff Garzik * None. 3589c6fd2807SJeff Garzik * 3590c6fd2807SJeff Garzik * RETURNS: 3591c6fd2807SJeff Garzik * 1 if @dev matches @new_class and @new_id, 0 otherwise. 3592c6fd2807SJeff Garzik */ 3593c6fd2807SJeff Garzik static int ata_dev_same_device(struct ata_device *dev, unsigned int new_class, 3594c6fd2807SJeff Garzik const u16 *new_id) 3595c6fd2807SJeff Garzik { 3596c6fd2807SJeff Garzik const u16 *old_id = dev->id; 3597a0cf733bSTejun Heo unsigned char model[2][ATA_ID_PROD_LEN + 1]; 3598a0cf733bSTejun Heo unsigned char serial[2][ATA_ID_SERNO_LEN + 1]; 3599c6fd2807SJeff Garzik 3600c6fd2807SJeff Garzik if (dev->class != new_class) { 3601c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_INFO, "class mismatch %d != %d\n", 3602c6fd2807SJeff Garzik dev->class, new_class); 3603c6fd2807SJeff Garzik return 0; 3604c6fd2807SJeff Garzik } 3605c6fd2807SJeff Garzik 3606a0cf733bSTejun Heo ata_id_c_string(old_id, model[0], ATA_ID_PROD, sizeof(model[0])); 3607a0cf733bSTejun Heo ata_id_c_string(new_id, model[1], ATA_ID_PROD, sizeof(model[1])); 3608a0cf733bSTejun Heo ata_id_c_string(old_id, serial[0], ATA_ID_SERNO, sizeof(serial[0])); 3609a0cf733bSTejun Heo ata_id_c_string(new_id, serial[1], ATA_ID_SERNO, sizeof(serial[1])); 3610c6fd2807SJeff Garzik 3611c6fd2807SJeff Garzik if (strcmp(model[0], model[1])) { 3612c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_INFO, "model number mismatch " 3613c6fd2807SJeff Garzik "'%s' != '%s'\n", model[0], model[1]); 3614c6fd2807SJeff Garzik return 0; 3615c6fd2807SJeff Garzik } 3616c6fd2807SJeff Garzik 3617c6fd2807SJeff Garzik if (strcmp(serial[0], serial[1])) { 3618c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_INFO, "serial number mismatch " 3619c6fd2807SJeff Garzik "'%s' != '%s'\n", serial[0], serial[1]); 3620c6fd2807SJeff Garzik return 0; 3621c6fd2807SJeff Garzik } 3622c6fd2807SJeff Garzik 3623c6fd2807SJeff Garzik return 1; 3624c6fd2807SJeff Garzik } 3625c6fd2807SJeff Garzik 3626c6fd2807SJeff Garzik /** 3627fe30911bSTejun Heo * ata_dev_reread_id - Re-read IDENTIFY data 36283fae450cSHenrik Kretzschmar * @dev: target ATA device 3629bff04647STejun Heo * @readid_flags: read ID flags 3630c6fd2807SJeff Garzik * 3631c6fd2807SJeff Garzik * Re-read IDENTIFY page and make sure @dev is still attached to 3632c6fd2807SJeff Garzik * the port. 3633c6fd2807SJeff Garzik * 3634c6fd2807SJeff Garzik * LOCKING: 3635c6fd2807SJeff Garzik * Kernel thread context (may sleep) 3636c6fd2807SJeff Garzik * 3637c6fd2807SJeff Garzik * RETURNS: 3638c6fd2807SJeff Garzik * 0 on success, negative errno otherwise 3639c6fd2807SJeff Garzik */ 3640fe30911bSTejun Heo int ata_dev_reread_id(struct ata_device *dev, unsigned int readid_flags) 3641c6fd2807SJeff Garzik { 3642c6fd2807SJeff Garzik unsigned int class = dev->class; 3643c6fd2807SJeff Garzik u16 *id = (void *)dev->ap->sector_buf; 3644c6fd2807SJeff Garzik int rc; 3645c6fd2807SJeff Garzik 3646c6fd2807SJeff Garzik /* read ID data */ 3647bff04647STejun Heo rc = ata_dev_read_id(dev, &class, readid_flags, id); 3648c6fd2807SJeff Garzik if (rc) 3649fe30911bSTejun Heo return rc; 3650c6fd2807SJeff Garzik 3651c6fd2807SJeff Garzik /* is the device still there? */ 3652fe30911bSTejun Heo if (!ata_dev_same_device(dev, class, id)) 3653fe30911bSTejun Heo return -ENODEV; 3654c6fd2807SJeff Garzik 3655c6fd2807SJeff Garzik memcpy(dev->id, id, sizeof(id[0]) * ATA_ID_WORDS); 3656fe30911bSTejun Heo return 0; 3657fe30911bSTejun Heo } 3658fe30911bSTejun Heo 3659fe30911bSTejun Heo /** 3660fe30911bSTejun Heo * ata_dev_revalidate - Revalidate ATA device 3661fe30911bSTejun Heo * @dev: device to revalidate 3662fe30911bSTejun Heo * @readid_flags: read ID flags 3663fe30911bSTejun Heo * 3664fe30911bSTejun Heo * Re-read IDENTIFY page, make sure @dev is still attached to the 3665fe30911bSTejun Heo * port and reconfigure it according to the new IDENTIFY page. 3666fe30911bSTejun Heo * 3667fe30911bSTejun Heo * LOCKING: 3668fe30911bSTejun Heo * Kernel thread context (may sleep) 3669fe30911bSTejun Heo * 3670fe30911bSTejun Heo * RETURNS: 3671fe30911bSTejun Heo * 0 on success, negative errno otherwise 3672fe30911bSTejun Heo */ 3673fe30911bSTejun Heo int ata_dev_revalidate(struct ata_device *dev, unsigned int readid_flags) 3674fe30911bSTejun Heo { 36756ddcd3b0STejun Heo u64 n_sectors = dev->n_sectors; 3676fe30911bSTejun Heo int rc; 3677fe30911bSTejun Heo 3678fe30911bSTejun Heo if (!ata_dev_enabled(dev)) 3679fe30911bSTejun Heo return -ENODEV; 3680fe30911bSTejun Heo 3681fe30911bSTejun Heo /* re-read ID */ 3682fe30911bSTejun Heo rc = ata_dev_reread_id(dev, readid_flags); 3683fe30911bSTejun Heo if (rc) 3684fe30911bSTejun Heo goto fail; 3685c6fd2807SJeff Garzik 3686c6fd2807SJeff Garzik /* configure device according to the new ID */ 3687efdaedc4STejun Heo rc = ata_dev_configure(dev); 36886ddcd3b0STejun Heo if (rc) 36896ddcd3b0STejun Heo goto fail; 36906ddcd3b0STejun Heo 36916ddcd3b0STejun Heo /* verify n_sectors hasn't changed */ 36926ddcd3b0STejun Heo if (dev->class == ATA_DEV_ATA && dev->n_sectors != n_sectors) { 36936ddcd3b0STejun Heo ata_dev_printk(dev, KERN_INFO, "n_sectors mismatch " 36946ddcd3b0STejun Heo "%llu != %llu\n", 36956ddcd3b0STejun Heo (unsigned long long)n_sectors, 36966ddcd3b0STejun Heo (unsigned long long)dev->n_sectors); 36976ddcd3b0STejun Heo rc = -ENODEV; 36986ddcd3b0STejun Heo goto fail; 36996ddcd3b0STejun Heo } 37006ddcd3b0STejun Heo 3701c6fd2807SJeff Garzik return 0; 3702c6fd2807SJeff Garzik 3703c6fd2807SJeff Garzik fail: 3704c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_ERR, "revalidation failed (errno=%d)\n", rc); 3705c6fd2807SJeff Garzik return rc; 3706c6fd2807SJeff Garzik } 3707c6fd2807SJeff Garzik 37086919a0a6SAlan Cox struct ata_blacklist_entry { 37096919a0a6SAlan Cox const char *model_num; 37106919a0a6SAlan Cox const char *model_rev; 37116919a0a6SAlan Cox unsigned long horkage; 37126919a0a6SAlan Cox }; 37136919a0a6SAlan Cox 37146919a0a6SAlan Cox static const struct ata_blacklist_entry ata_device_blacklist [] = { 37156919a0a6SAlan Cox /* Devices with DMA related problems under Linux */ 37166919a0a6SAlan Cox { "WDC AC11000H", NULL, ATA_HORKAGE_NODMA }, 37176919a0a6SAlan Cox { "WDC AC22100H", NULL, ATA_HORKAGE_NODMA }, 37186919a0a6SAlan Cox { "WDC AC32500H", NULL, ATA_HORKAGE_NODMA }, 37196919a0a6SAlan Cox { "WDC AC33100H", NULL, ATA_HORKAGE_NODMA }, 37206919a0a6SAlan Cox { "WDC AC31600H", NULL, ATA_HORKAGE_NODMA }, 37216919a0a6SAlan Cox { "WDC AC32100H", "24.09P07", ATA_HORKAGE_NODMA }, 37226919a0a6SAlan Cox { "WDC AC23200L", "21.10N21", ATA_HORKAGE_NODMA }, 37236919a0a6SAlan Cox { "Compaq CRD-8241B", NULL, ATA_HORKAGE_NODMA }, 37246919a0a6SAlan Cox { "CRD-8400B", NULL, ATA_HORKAGE_NODMA }, 37256919a0a6SAlan Cox { "CRD-8480B", NULL, ATA_HORKAGE_NODMA }, 37266919a0a6SAlan Cox { "CRD-8482B", NULL, ATA_HORKAGE_NODMA }, 37276919a0a6SAlan Cox { "CRD-84", NULL, ATA_HORKAGE_NODMA }, 37286919a0a6SAlan Cox { "SanDisk SDP3B", NULL, ATA_HORKAGE_NODMA }, 37296919a0a6SAlan Cox { "SanDisk SDP3B-64", NULL, ATA_HORKAGE_NODMA }, 37306919a0a6SAlan Cox { "SANYO CD-ROM CRD", NULL, ATA_HORKAGE_NODMA }, 37316919a0a6SAlan Cox { "HITACHI CDR-8", NULL, ATA_HORKAGE_NODMA }, 37326919a0a6SAlan Cox { "HITACHI CDR-8335", NULL, ATA_HORKAGE_NODMA }, 37336919a0a6SAlan Cox { "HITACHI CDR-8435", NULL, ATA_HORKAGE_NODMA }, 37346919a0a6SAlan Cox { "Toshiba CD-ROM XM-6202B", NULL, ATA_HORKAGE_NODMA }, 37356919a0a6SAlan Cox { "TOSHIBA CD-ROM XM-1702BC", NULL, ATA_HORKAGE_NODMA }, 37366919a0a6SAlan Cox { "CD-532E-A", NULL, ATA_HORKAGE_NODMA }, 37376919a0a6SAlan Cox { "E-IDE CD-ROM CR-840",NULL, ATA_HORKAGE_NODMA }, 37386919a0a6SAlan Cox { "CD-ROM Drive/F5A", NULL, ATA_HORKAGE_NODMA }, 37396919a0a6SAlan Cox { "WPI CDD-820", NULL, ATA_HORKAGE_NODMA }, 37406919a0a6SAlan Cox { "SAMSUNG CD-ROM SC-148C", NULL, ATA_HORKAGE_NODMA }, 37416919a0a6SAlan Cox { "SAMSUNG CD-ROM SC", NULL, ATA_HORKAGE_NODMA }, 37426919a0a6SAlan Cox { "ATAPI CD-ROM DRIVE 40X MAXIMUM",NULL,ATA_HORKAGE_NODMA }, 37436919a0a6SAlan Cox { "_NEC DV5800A", NULL, ATA_HORKAGE_NODMA }, 37446919a0a6SAlan Cox { "SAMSUNG CD-ROM SN-124","N001", ATA_HORKAGE_NODMA }, 374539f19886SDave Jones { "Seagate STT20000A", NULL, ATA_HORKAGE_NODMA }, 37465acd50f6STejun Heo { "IOMEGA ZIP 250 ATAPI", NULL, ATA_HORKAGE_NODMA }, /* temporary fix */ 374739ce7128STejun Heo { "IOMEGA ZIP 250 ATAPI Floppy", 374839ce7128STejun Heo NULL, ATA_HORKAGE_NODMA }, 37496919a0a6SAlan Cox 375018d6e9d5SAlbert Lee /* Weird ATAPI devices */ 375140a1d531STejun Heo { "TORiSAN DVD-ROM DRD-N216", NULL, ATA_HORKAGE_MAX_SEC_128 }, 375218d6e9d5SAlbert Lee 37536919a0a6SAlan Cox /* Devices we expect to fail diagnostics */ 37546919a0a6SAlan Cox 37556919a0a6SAlan Cox /* Devices where NCQ should be avoided */ 37566919a0a6SAlan Cox /* NCQ is slow */ 37576919a0a6SAlan Cox { "WDC WD740ADFD-00", NULL, ATA_HORKAGE_NONCQ }, 375809125ea6STejun Heo /* http://thread.gmane.org/gmane.linux.ide/14907 */ 375909125ea6STejun Heo { "FUJITSU MHT2060BH", NULL, ATA_HORKAGE_NONCQ }, 37607acfaf30SPaul Rolland /* NCQ is broken */ 37617acfaf30SPaul Rolland { "Maxtor 6L250S0", "BANC1G10", ATA_HORKAGE_NONCQ }, 3762471e44b2SJeff Garzik { "Maxtor 6B200M0", "BANC1B10", ATA_HORKAGE_NONCQ }, 376396442925SJens Axboe /* NCQ hard hangs device under heavier load, needs hard power cycle */ 376496442925SJens Axboe { "Maxtor 6B250S0", "BANC1B70", ATA_HORKAGE_NONCQ }, 376536e337d0SRobert Hancock /* Blacklist entries taken from Silicon Image 3124/3132 376636e337d0SRobert Hancock Windows driver .inf file - also several Linux problem reports */ 376736e337d0SRobert Hancock { "HTS541060G9SA00", "MB3OC60D", ATA_HORKAGE_NONCQ, }, 376836e337d0SRobert Hancock { "HTS541080G9SA00", "MB4OC60D", ATA_HORKAGE_NONCQ, }, 376936e337d0SRobert Hancock { "HTS541010G9SA00", "MBZOC60D", ATA_HORKAGE_NONCQ, }, 3770bd9c5a39STejun Heo /* Drives which do spurious command completion */ 3771bd9c5a39STejun Heo { "HTS541680J9SA00", "SB2IC7EP", ATA_HORKAGE_NONCQ, }, 37722f8fcebbSTejun Heo { "HTS541612J9SA00", "SBDIC7JP", ATA_HORKAGE_NONCQ, }, 3773e14cbfa6STejun Heo { "Hitachi HTS541616J9SA00", "SB4OC70P", ATA_HORKAGE_NONCQ, }, 37742f8fcebbSTejun Heo { "WDC WD740ADFD-00NLR1", NULL, ATA_HORKAGE_NONCQ, }, 3775a520f261STejun Heo { "FUJITSU MHV2080BH", "00840028", ATA_HORKAGE_NONCQ, }, 37766919a0a6SAlan Cox 37776919a0a6SAlan Cox /* Devices with NCQ limits */ 37786919a0a6SAlan Cox 37796919a0a6SAlan Cox /* End Marker */ 37806919a0a6SAlan Cox { } 3781c6fd2807SJeff Garzik }; 3782c6fd2807SJeff Garzik 378375683fe7STejun Heo static unsigned long ata_dev_blacklisted(const struct ata_device *dev) 3784c6fd2807SJeff Garzik { 37858bfa79fcSTejun Heo unsigned char model_num[ATA_ID_PROD_LEN + 1]; 37868bfa79fcSTejun Heo unsigned char model_rev[ATA_ID_FW_REV_LEN + 1]; 37876919a0a6SAlan Cox const struct ata_blacklist_entry *ad = ata_device_blacklist; 3788c6fd2807SJeff Garzik 37898bfa79fcSTejun Heo ata_id_c_string(dev->id, model_num, ATA_ID_PROD, sizeof(model_num)); 37908bfa79fcSTejun Heo ata_id_c_string(dev->id, model_rev, ATA_ID_FW_REV, sizeof(model_rev)); 3791c6fd2807SJeff Garzik 37926919a0a6SAlan Cox while (ad->model_num) { 37938bfa79fcSTejun Heo if (!strcmp(ad->model_num, model_num)) { 37946919a0a6SAlan Cox if (ad->model_rev == NULL) 37956919a0a6SAlan Cox return ad->horkage; 37968bfa79fcSTejun Heo if (!strcmp(ad->model_rev, model_rev)) 37976919a0a6SAlan Cox return ad->horkage; 3798c6fd2807SJeff Garzik } 37996919a0a6SAlan Cox ad++; 3800c6fd2807SJeff Garzik } 3801c6fd2807SJeff Garzik return 0; 3802c6fd2807SJeff Garzik } 3803c6fd2807SJeff Garzik 38046919a0a6SAlan Cox static int ata_dma_blacklisted(const struct ata_device *dev) 38056919a0a6SAlan Cox { 38066919a0a6SAlan Cox /* We don't support polling DMA. 38076919a0a6SAlan Cox * DMA blacklist those ATAPI devices with CDB-intr (and use PIO) 38086919a0a6SAlan Cox * if the LLDD handles only interrupts in the HSM_ST_LAST state. 38096919a0a6SAlan Cox */ 38106919a0a6SAlan Cox if ((dev->ap->flags & ATA_FLAG_PIO_POLLING) && 38116919a0a6SAlan Cox (dev->flags & ATA_DFLAG_CDB_INTR)) 38126919a0a6SAlan Cox return 1; 381375683fe7STejun Heo return (dev->horkage & ATA_HORKAGE_NODMA) ? 1 : 0; 38146919a0a6SAlan Cox } 38156919a0a6SAlan Cox 3816c6fd2807SJeff Garzik /** 3817c6fd2807SJeff Garzik * ata_dev_xfermask - Compute supported xfermask of the given device 3818c6fd2807SJeff Garzik * @dev: Device to compute xfermask for 3819c6fd2807SJeff Garzik * 3820c6fd2807SJeff Garzik * Compute supported xfermask of @dev and store it in 3821c6fd2807SJeff Garzik * dev->*_mask. This function is responsible for applying all 3822c6fd2807SJeff Garzik * known limits including host controller limits, device 3823c6fd2807SJeff Garzik * blacklist, etc... 3824c6fd2807SJeff Garzik * 3825c6fd2807SJeff Garzik * LOCKING: 3826c6fd2807SJeff Garzik * None. 3827c6fd2807SJeff Garzik */ 3828c6fd2807SJeff Garzik static void ata_dev_xfermask(struct ata_device *dev) 3829c6fd2807SJeff Garzik { 3830c6fd2807SJeff Garzik struct ata_port *ap = dev->ap; 3831cca3974eSJeff Garzik struct ata_host *host = ap->host; 3832c6fd2807SJeff Garzik unsigned long xfer_mask; 3833c6fd2807SJeff Garzik 3834c6fd2807SJeff Garzik /* controller modes available */ 3835c6fd2807SJeff Garzik xfer_mask = ata_pack_xfermask(ap->pio_mask, 3836c6fd2807SJeff Garzik ap->mwdma_mask, ap->udma_mask); 3837c6fd2807SJeff Garzik 38388343f889SRobert Hancock /* drive modes available */ 3839c6fd2807SJeff Garzik xfer_mask &= ata_pack_xfermask(dev->pio_mask, 3840c6fd2807SJeff Garzik dev->mwdma_mask, dev->udma_mask); 3841c6fd2807SJeff Garzik xfer_mask &= ata_id_xfermask(dev->id); 3842c6fd2807SJeff Garzik 3843b352e57dSAlan Cox /* 3844b352e57dSAlan Cox * CFA Advanced TrueIDE timings are not allowed on a shared 3845b352e57dSAlan Cox * cable 3846b352e57dSAlan Cox */ 3847b352e57dSAlan Cox if (ata_dev_pair(dev)) { 3848b352e57dSAlan Cox /* No PIO5 or PIO6 */ 3849b352e57dSAlan Cox xfer_mask &= ~(0x03 << (ATA_SHIFT_PIO + 5)); 3850b352e57dSAlan Cox /* No MWDMA3 or MWDMA 4 */ 3851b352e57dSAlan Cox xfer_mask &= ~(0x03 << (ATA_SHIFT_MWDMA + 3)); 3852b352e57dSAlan Cox } 3853b352e57dSAlan Cox 3854c6fd2807SJeff Garzik if (ata_dma_blacklisted(dev)) { 3855c6fd2807SJeff Garzik xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA); 3856c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_WARNING, 3857c6fd2807SJeff Garzik "device is on DMA blacklist, disabling DMA\n"); 3858c6fd2807SJeff Garzik } 3859c6fd2807SJeff Garzik 386014d66ab7SPetr Vandrovec if ((host->flags & ATA_HOST_SIMPLEX) && 386114d66ab7SPetr Vandrovec host->simplex_claimed && host->simplex_claimed != ap) { 3862c6fd2807SJeff Garzik xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA); 3863c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_WARNING, "simplex DMA is claimed by " 3864c6fd2807SJeff Garzik "other device, disabling DMA\n"); 3865c6fd2807SJeff Garzik } 3866c6fd2807SJeff Garzik 3867e424675fSJeff Garzik if (ap->flags & ATA_FLAG_NO_IORDY) 3868e424675fSJeff Garzik xfer_mask &= ata_pio_mask_no_iordy(dev); 3869e424675fSJeff Garzik 3870c6fd2807SJeff Garzik if (ap->ops->mode_filter) 3871a76b62caSAlan Cox xfer_mask = ap->ops->mode_filter(dev, xfer_mask); 3872c6fd2807SJeff Garzik 38738343f889SRobert Hancock /* Apply cable rule here. Don't apply it early because when 38748343f889SRobert Hancock * we handle hot plug the cable type can itself change. 38758343f889SRobert Hancock * Check this last so that we know if the transfer rate was 38768343f889SRobert Hancock * solely limited by the cable. 38778343f889SRobert Hancock * Unknown or 80 wire cables reported host side are checked 38788343f889SRobert Hancock * drive side as well. Cases where we know a 40wire cable 38798343f889SRobert Hancock * is used safely for 80 are not checked here. 38808343f889SRobert Hancock */ 38818343f889SRobert Hancock if (xfer_mask & (0xF8 << ATA_SHIFT_UDMA)) 38828343f889SRobert Hancock /* UDMA/44 or higher would be available */ 38838343f889SRobert Hancock if((ap->cbl == ATA_CBL_PATA40) || 38848343f889SRobert Hancock (ata_drive_40wire(dev->id) && 38858343f889SRobert Hancock (ap->cbl == ATA_CBL_PATA_UNK || 38868343f889SRobert Hancock ap->cbl == ATA_CBL_PATA80))) { 38878343f889SRobert Hancock ata_dev_printk(dev, KERN_WARNING, 38888343f889SRobert Hancock "limited to UDMA/33 due to 40-wire cable\n"); 38898343f889SRobert Hancock xfer_mask &= ~(0xF8 << ATA_SHIFT_UDMA); 38908343f889SRobert Hancock } 38918343f889SRobert Hancock 3892c6fd2807SJeff Garzik ata_unpack_xfermask(xfer_mask, &dev->pio_mask, 3893c6fd2807SJeff Garzik &dev->mwdma_mask, &dev->udma_mask); 3894c6fd2807SJeff Garzik } 3895c6fd2807SJeff Garzik 3896c6fd2807SJeff Garzik /** 3897c6fd2807SJeff Garzik * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command 3898c6fd2807SJeff Garzik * @dev: Device to which command will be sent 3899c6fd2807SJeff Garzik * 3900c6fd2807SJeff Garzik * Issue SET FEATURES - XFER MODE command to device @dev 3901c6fd2807SJeff Garzik * on port @ap. 3902c6fd2807SJeff Garzik * 3903c6fd2807SJeff Garzik * LOCKING: 3904c6fd2807SJeff Garzik * PCI/etc. bus probe sem. 3905c6fd2807SJeff Garzik * 3906c6fd2807SJeff Garzik * RETURNS: 3907c6fd2807SJeff Garzik * 0 on success, AC_ERR_* mask otherwise. 3908c6fd2807SJeff Garzik */ 3909c6fd2807SJeff Garzik 3910c6fd2807SJeff Garzik static unsigned int ata_dev_set_xfermode(struct ata_device *dev) 3911c6fd2807SJeff Garzik { 3912c6fd2807SJeff Garzik struct ata_taskfile tf; 3913c6fd2807SJeff Garzik unsigned int err_mask; 3914c6fd2807SJeff Garzik 3915c6fd2807SJeff Garzik /* set up set-features taskfile */ 3916c6fd2807SJeff Garzik DPRINTK("set features - xfer mode\n"); 3917c6fd2807SJeff Garzik 3918464cf177STejun Heo /* Some controllers and ATAPI devices show flaky interrupt 3919464cf177STejun Heo * behavior after setting xfer mode. Use polling instead. 3920464cf177STejun Heo */ 3921c6fd2807SJeff Garzik ata_tf_init(dev, &tf); 3922c6fd2807SJeff Garzik tf.command = ATA_CMD_SET_FEATURES; 3923c6fd2807SJeff Garzik tf.feature = SETFEATURES_XFER; 3924464cf177STejun Heo tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_POLLING; 3925c6fd2807SJeff Garzik tf.protocol = ATA_PROT_NODATA; 3926c6fd2807SJeff Garzik tf.nsect = dev->xfer_mode; 3927c6fd2807SJeff Garzik 3928c6fd2807SJeff Garzik err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0); 3929c6fd2807SJeff Garzik 3930c6fd2807SJeff Garzik DPRINTK("EXIT, err_mask=%x\n", err_mask); 3931c6fd2807SJeff Garzik return err_mask; 3932c6fd2807SJeff Garzik } 3933c6fd2807SJeff Garzik 3934c6fd2807SJeff Garzik /** 3935c6fd2807SJeff Garzik * ata_dev_init_params - Issue INIT DEV PARAMS command 3936c6fd2807SJeff Garzik * @dev: Device to which command will be sent 3937c6fd2807SJeff Garzik * @heads: Number of heads (taskfile parameter) 3938c6fd2807SJeff Garzik * @sectors: Number of sectors (taskfile parameter) 3939c6fd2807SJeff Garzik * 3940c6fd2807SJeff Garzik * LOCKING: 3941c6fd2807SJeff Garzik * Kernel thread context (may sleep) 3942c6fd2807SJeff Garzik * 3943c6fd2807SJeff Garzik * RETURNS: 3944c6fd2807SJeff Garzik * 0 on success, AC_ERR_* mask otherwise. 3945c6fd2807SJeff Garzik */ 3946c6fd2807SJeff Garzik static unsigned int ata_dev_init_params(struct ata_device *dev, 3947c6fd2807SJeff Garzik u16 heads, u16 sectors) 3948c6fd2807SJeff Garzik { 3949c6fd2807SJeff Garzik struct ata_taskfile tf; 3950c6fd2807SJeff Garzik unsigned int err_mask; 3951c6fd2807SJeff Garzik 3952c6fd2807SJeff Garzik /* Number of sectors per track 1-255. Number of heads 1-16 */ 3953c6fd2807SJeff Garzik if (sectors < 1 || sectors > 255 || heads < 1 || heads > 16) 3954c6fd2807SJeff Garzik return AC_ERR_INVALID; 3955c6fd2807SJeff Garzik 3956c6fd2807SJeff Garzik /* set up init dev params taskfile */ 3957c6fd2807SJeff Garzik DPRINTK("init dev params \n"); 3958c6fd2807SJeff Garzik 3959c6fd2807SJeff Garzik ata_tf_init(dev, &tf); 3960c6fd2807SJeff Garzik tf.command = ATA_CMD_INIT_DEV_PARAMS; 3961c6fd2807SJeff Garzik tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 3962c6fd2807SJeff Garzik tf.protocol = ATA_PROT_NODATA; 3963c6fd2807SJeff Garzik tf.nsect = sectors; 3964c6fd2807SJeff Garzik tf.device |= (heads - 1) & 0x0f; /* max head = num. of heads - 1 */ 3965c6fd2807SJeff Garzik 3966c6fd2807SJeff Garzik err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0); 3967c6fd2807SJeff Garzik 3968c6fd2807SJeff Garzik DPRINTK("EXIT, err_mask=%x\n", err_mask); 3969c6fd2807SJeff Garzik return err_mask; 3970c6fd2807SJeff Garzik } 3971c6fd2807SJeff Garzik 3972c6fd2807SJeff Garzik /** 3973c6fd2807SJeff Garzik * ata_sg_clean - Unmap DMA memory associated with command 3974c6fd2807SJeff Garzik * @qc: Command containing DMA memory to be released 3975c6fd2807SJeff Garzik * 3976c6fd2807SJeff Garzik * Unmap all mapped DMA memory associated with this command. 3977c6fd2807SJeff Garzik * 3978c6fd2807SJeff Garzik * LOCKING: 3979cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 3980c6fd2807SJeff Garzik */ 398170e6ad0cSTejun Heo void ata_sg_clean(struct ata_queued_cmd *qc) 3982c6fd2807SJeff Garzik { 3983c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 3984c6fd2807SJeff Garzik struct scatterlist *sg = qc->__sg; 3985c6fd2807SJeff Garzik int dir = qc->dma_dir; 3986c6fd2807SJeff Garzik void *pad_buf = NULL; 3987c6fd2807SJeff Garzik 3988c6fd2807SJeff Garzik WARN_ON(!(qc->flags & ATA_QCFLAG_DMAMAP)); 3989c6fd2807SJeff Garzik WARN_ON(sg == NULL); 3990c6fd2807SJeff Garzik 3991c6fd2807SJeff Garzik if (qc->flags & ATA_QCFLAG_SINGLE) 3992c6fd2807SJeff Garzik WARN_ON(qc->n_elem > 1); 3993c6fd2807SJeff Garzik 3994c6fd2807SJeff Garzik VPRINTK("unmapping %u sg elements\n", qc->n_elem); 3995c6fd2807SJeff Garzik 3996c6fd2807SJeff Garzik /* if we padded the buffer out to 32-bit bound, and data 3997c6fd2807SJeff Garzik * xfer direction is from-device, we must copy from the 3998c6fd2807SJeff Garzik * pad buffer back into the supplied buffer 3999c6fd2807SJeff Garzik */ 4000c6fd2807SJeff Garzik if (qc->pad_len && !(qc->tf.flags & ATA_TFLAG_WRITE)) 4001c6fd2807SJeff Garzik pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ); 4002c6fd2807SJeff Garzik 4003c6fd2807SJeff Garzik if (qc->flags & ATA_QCFLAG_SG) { 4004c6fd2807SJeff Garzik if (qc->n_elem) 4005c6fd2807SJeff Garzik dma_unmap_sg(ap->dev, sg, qc->n_elem, dir); 4006c6fd2807SJeff Garzik /* restore last sg */ 4007c6fd2807SJeff Garzik sg[qc->orig_n_elem - 1].length += qc->pad_len; 4008c6fd2807SJeff Garzik if (pad_buf) { 4009c6fd2807SJeff Garzik struct scatterlist *psg = &qc->pad_sgent; 4010c6fd2807SJeff Garzik void *addr = kmap_atomic(psg->page, KM_IRQ0); 4011c6fd2807SJeff Garzik memcpy(addr + psg->offset, pad_buf, qc->pad_len); 4012c6fd2807SJeff Garzik kunmap_atomic(addr, KM_IRQ0); 4013c6fd2807SJeff Garzik } 4014c6fd2807SJeff Garzik } else { 4015c6fd2807SJeff Garzik if (qc->n_elem) 4016c6fd2807SJeff Garzik dma_unmap_single(ap->dev, 4017c6fd2807SJeff Garzik sg_dma_address(&sg[0]), sg_dma_len(&sg[0]), 4018c6fd2807SJeff Garzik dir); 4019c6fd2807SJeff Garzik /* restore sg */ 4020c6fd2807SJeff Garzik sg->length += qc->pad_len; 4021c6fd2807SJeff Garzik if (pad_buf) 4022c6fd2807SJeff Garzik memcpy(qc->buf_virt + sg->length - qc->pad_len, 4023c6fd2807SJeff Garzik pad_buf, qc->pad_len); 4024c6fd2807SJeff Garzik } 4025c6fd2807SJeff Garzik 4026c6fd2807SJeff Garzik qc->flags &= ~ATA_QCFLAG_DMAMAP; 4027c6fd2807SJeff Garzik qc->__sg = NULL; 4028c6fd2807SJeff Garzik } 4029c6fd2807SJeff Garzik 4030c6fd2807SJeff Garzik /** 4031c6fd2807SJeff Garzik * ata_fill_sg - Fill PCI IDE PRD table 4032c6fd2807SJeff Garzik * @qc: Metadata associated with taskfile to be transferred 4033c6fd2807SJeff Garzik * 4034c6fd2807SJeff Garzik * Fill PCI IDE PRD (scatter-gather) table with segments 4035c6fd2807SJeff Garzik * associated with the current disk command. 4036c6fd2807SJeff Garzik * 4037c6fd2807SJeff Garzik * LOCKING: 4038cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 4039c6fd2807SJeff Garzik * 4040c6fd2807SJeff Garzik */ 4041c6fd2807SJeff Garzik static void ata_fill_sg(struct ata_queued_cmd *qc) 4042c6fd2807SJeff Garzik { 4043c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 4044c6fd2807SJeff Garzik struct scatterlist *sg; 4045c6fd2807SJeff Garzik unsigned int idx; 4046c6fd2807SJeff Garzik 4047c6fd2807SJeff Garzik WARN_ON(qc->__sg == NULL); 4048c6fd2807SJeff Garzik WARN_ON(qc->n_elem == 0 && qc->pad_len == 0); 4049c6fd2807SJeff Garzik 4050c6fd2807SJeff Garzik idx = 0; 4051c6fd2807SJeff Garzik ata_for_each_sg(sg, qc) { 4052c6fd2807SJeff Garzik u32 addr, offset; 4053c6fd2807SJeff Garzik u32 sg_len, len; 4054c6fd2807SJeff Garzik 4055c6fd2807SJeff Garzik /* determine if physical DMA addr spans 64K boundary. 4056c6fd2807SJeff Garzik * Note h/w doesn't support 64-bit, so we unconditionally 4057c6fd2807SJeff Garzik * truncate dma_addr_t to u32. 4058c6fd2807SJeff Garzik */ 4059c6fd2807SJeff Garzik addr = (u32) sg_dma_address(sg); 4060c6fd2807SJeff Garzik sg_len = sg_dma_len(sg); 4061c6fd2807SJeff Garzik 4062c6fd2807SJeff Garzik while (sg_len) { 4063c6fd2807SJeff Garzik offset = addr & 0xffff; 4064c6fd2807SJeff Garzik len = sg_len; 4065c6fd2807SJeff Garzik if ((offset + sg_len) > 0x10000) 4066c6fd2807SJeff Garzik len = 0x10000 - offset; 4067c6fd2807SJeff Garzik 4068c6fd2807SJeff Garzik ap->prd[idx].addr = cpu_to_le32(addr); 4069c6fd2807SJeff Garzik ap->prd[idx].flags_len = cpu_to_le32(len & 0xffff); 4070c6fd2807SJeff Garzik VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", idx, addr, len); 4071c6fd2807SJeff Garzik 4072c6fd2807SJeff Garzik idx++; 4073c6fd2807SJeff Garzik sg_len -= len; 4074c6fd2807SJeff Garzik addr += len; 4075c6fd2807SJeff Garzik } 4076c6fd2807SJeff Garzik } 4077c6fd2807SJeff Garzik 4078c6fd2807SJeff Garzik if (idx) 4079c6fd2807SJeff Garzik ap->prd[idx - 1].flags_len |= cpu_to_le32(ATA_PRD_EOT); 4080c6fd2807SJeff Garzik } 4081b9a4197eSTejun Heo 4082c6fd2807SJeff Garzik /** 4083d26fc955SAlan Cox * ata_fill_sg_dumb - Fill PCI IDE PRD table 4084d26fc955SAlan Cox * @qc: Metadata associated with taskfile to be transferred 4085d26fc955SAlan Cox * 4086d26fc955SAlan Cox * Fill PCI IDE PRD (scatter-gather) table with segments 4087d26fc955SAlan Cox * associated with the current disk command. Perform the fill 4088d26fc955SAlan Cox * so that we avoid writing any length 64K records for 4089d26fc955SAlan Cox * controllers that don't follow the spec. 4090d26fc955SAlan Cox * 4091d26fc955SAlan Cox * LOCKING: 4092d26fc955SAlan Cox * spin_lock_irqsave(host lock) 4093d26fc955SAlan Cox * 4094d26fc955SAlan Cox */ 4095d26fc955SAlan Cox static void ata_fill_sg_dumb(struct ata_queued_cmd *qc) 4096d26fc955SAlan Cox { 4097d26fc955SAlan Cox struct ata_port *ap = qc->ap; 4098d26fc955SAlan Cox struct scatterlist *sg; 4099d26fc955SAlan Cox unsigned int idx; 4100d26fc955SAlan Cox 4101d26fc955SAlan Cox WARN_ON(qc->__sg == NULL); 4102d26fc955SAlan Cox WARN_ON(qc->n_elem == 0 && qc->pad_len == 0); 4103d26fc955SAlan Cox 4104d26fc955SAlan Cox idx = 0; 4105d26fc955SAlan Cox ata_for_each_sg(sg, qc) { 4106d26fc955SAlan Cox u32 addr, offset; 4107d26fc955SAlan Cox u32 sg_len, len, blen; 4108d26fc955SAlan Cox 4109d26fc955SAlan Cox /* determine if physical DMA addr spans 64K boundary. 4110d26fc955SAlan Cox * Note h/w doesn't support 64-bit, so we unconditionally 4111d26fc955SAlan Cox * truncate dma_addr_t to u32. 4112d26fc955SAlan Cox */ 4113d26fc955SAlan Cox addr = (u32) sg_dma_address(sg); 4114d26fc955SAlan Cox sg_len = sg_dma_len(sg); 4115d26fc955SAlan Cox 4116d26fc955SAlan Cox while (sg_len) { 4117d26fc955SAlan Cox offset = addr & 0xffff; 4118d26fc955SAlan Cox len = sg_len; 4119d26fc955SAlan Cox if ((offset + sg_len) > 0x10000) 4120d26fc955SAlan Cox len = 0x10000 - offset; 4121d26fc955SAlan Cox 4122d26fc955SAlan Cox blen = len & 0xffff; 4123d26fc955SAlan Cox ap->prd[idx].addr = cpu_to_le32(addr); 4124d26fc955SAlan Cox if (blen == 0) { 4125d26fc955SAlan Cox /* Some PATA chipsets like the CS5530 can't 4126d26fc955SAlan Cox cope with 0x0000 meaning 64K as the spec says */ 4127d26fc955SAlan Cox ap->prd[idx].flags_len = cpu_to_le32(0x8000); 4128d26fc955SAlan Cox blen = 0x8000; 4129d26fc955SAlan Cox ap->prd[++idx].addr = cpu_to_le32(addr + 0x8000); 4130d26fc955SAlan Cox } 4131d26fc955SAlan Cox ap->prd[idx].flags_len = cpu_to_le32(blen); 4132d26fc955SAlan Cox VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", idx, addr, len); 4133d26fc955SAlan Cox 4134d26fc955SAlan Cox idx++; 4135d26fc955SAlan Cox sg_len -= len; 4136d26fc955SAlan Cox addr += len; 4137d26fc955SAlan Cox } 4138d26fc955SAlan Cox } 4139d26fc955SAlan Cox 4140d26fc955SAlan Cox if (idx) 4141d26fc955SAlan Cox ap->prd[idx - 1].flags_len |= cpu_to_le32(ATA_PRD_EOT); 4142d26fc955SAlan Cox } 4143d26fc955SAlan Cox 4144d26fc955SAlan Cox /** 4145c6fd2807SJeff Garzik * ata_check_atapi_dma - Check whether ATAPI DMA can be supported 4146c6fd2807SJeff Garzik * @qc: Metadata associated with taskfile to check 4147c6fd2807SJeff Garzik * 4148c6fd2807SJeff Garzik * Allow low-level driver to filter ATA PACKET commands, returning 4149c6fd2807SJeff Garzik * a status indicating whether or not it is OK to use DMA for the 4150c6fd2807SJeff Garzik * supplied PACKET command. 4151c6fd2807SJeff Garzik * 4152c6fd2807SJeff Garzik * LOCKING: 4153cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 4154c6fd2807SJeff Garzik * 4155c6fd2807SJeff Garzik * RETURNS: 0 when ATAPI DMA can be used 4156c6fd2807SJeff Garzik * nonzero otherwise 4157c6fd2807SJeff Garzik */ 4158c6fd2807SJeff Garzik int ata_check_atapi_dma(struct ata_queued_cmd *qc) 4159c6fd2807SJeff Garzik { 4160c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 4161c6fd2807SJeff Garzik 4162b9a4197eSTejun Heo /* Don't allow DMA if it isn't multiple of 16 bytes. Quite a 4163b9a4197eSTejun Heo * few ATAPI devices choke on such DMA requests. 4164b9a4197eSTejun Heo */ 4165b9a4197eSTejun Heo if (unlikely(qc->nbytes & 15)) 41666f23a31dSAlbert Lee return 1; 41676f23a31dSAlbert Lee 4168c6fd2807SJeff Garzik if (ap->ops->check_atapi_dma) 4169b9a4197eSTejun Heo return ap->ops->check_atapi_dma(qc); 4170c6fd2807SJeff Garzik 4171b9a4197eSTejun Heo return 0; 4172c6fd2807SJeff Garzik } 4173b9a4197eSTejun Heo 4174c6fd2807SJeff Garzik /** 4175c6fd2807SJeff Garzik * ata_qc_prep - Prepare taskfile for submission 4176c6fd2807SJeff Garzik * @qc: Metadata associated with taskfile to be prepared 4177c6fd2807SJeff Garzik * 4178c6fd2807SJeff Garzik * Prepare ATA taskfile for submission. 4179c6fd2807SJeff Garzik * 4180c6fd2807SJeff Garzik * LOCKING: 4181cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 4182c6fd2807SJeff Garzik */ 4183c6fd2807SJeff Garzik void ata_qc_prep(struct ata_queued_cmd *qc) 4184c6fd2807SJeff Garzik { 4185c6fd2807SJeff Garzik if (!(qc->flags & ATA_QCFLAG_DMAMAP)) 4186c6fd2807SJeff Garzik return; 4187c6fd2807SJeff Garzik 4188c6fd2807SJeff Garzik ata_fill_sg(qc); 4189c6fd2807SJeff Garzik } 4190c6fd2807SJeff Garzik 4191d26fc955SAlan Cox /** 4192d26fc955SAlan Cox * ata_dumb_qc_prep - Prepare taskfile for submission 4193d26fc955SAlan Cox * @qc: Metadata associated with taskfile to be prepared 4194d26fc955SAlan Cox * 4195d26fc955SAlan Cox * Prepare ATA taskfile for submission. 4196d26fc955SAlan Cox * 4197d26fc955SAlan Cox * LOCKING: 4198d26fc955SAlan Cox * spin_lock_irqsave(host lock) 4199d26fc955SAlan Cox */ 4200d26fc955SAlan Cox void ata_dumb_qc_prep(struct ata_queued_cmd *qc) 4201d26fc955SAlan Cox { 4202d26fc955SAlan Cox if (!(qc->flags & ATA_QCFLAG_DMAMAP)) 4203d26fc955SAlan Cox return; 4204d26fc955SAlan Cox 4205d26fc955SAlan Cox ata_fill_sg_dumb(qc); 4206d26fc955SAlan Cox } 4207d26fc955SAlan Cox 4208c6fd2807SJeff Garzik void ata_noop_qc_prep(struct ata_queued_cmd *qc) { } 4209c6fd2807SJeff Garzik 4210c6fd2807SJeff Garzik /** 4211c6fd2807SJeff Garzik * ata_sg_init_one - Associate command with memory buffer 4212c6fd2807SJeff Garzik * @qc: Command to be associated 4213c6fd2807SJeff Garzik * @buf: Memory buffer 4214c6fd2807SJeff Garzik * @buflen: Length of memory buffer, in bytes. 4215c6fd2807SJeff Garzik * 4216c6fd2807SJeff Garzik * Initialize the data-related elements of queued_cmd @qc 4217c6fd2807SJeff Garzik * to point to a single memory buffer, @buf of byte length @buflen. 4218c6fd2807SJeff Garzik * 4219c6fd2807SJeff Garzik * LOCKING: 4220cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 4221c6fd2807SJeff Garzik */ 4222c6fd2807SJeff Garzik 4223c6fd2807SJeff Garzik void ata_sg_init_one(struct ata_queued_cmd *qc, void *buf, unsigned int buflen) 4224c6fd2807SJeff Garzik { 4225c6fd2807SJeff Garzik qc->flags |= ATA_QCFLAG_SINGLE; 4226c6fd2807SJeff Garzik 4227c6fd2807SJeff Garzik qc->__sg = &qc->sgent; 4228c6fd2807SJeff Garzik qc->n_elem = 1; 4229c6fd2807SJeff Garzik qc->orig_n_elem = 1; 4230c6fd2807SJeff Garzik qc->buf_virt = buf; 4231c6fd2807SJeff Garzik qc->nbytes = buflen; 4232c6fd2807SJeff Garzik 423361c0596cSTejun Heo sg_init_one(&qc->sgent, buf, buflen); 4234c6fd2807SJeff Garzik } 4235c6fd2807SJeff Garzik 4236c6fd2807SJeff Garzik /** 4237c6fd2807SJeff Garzik * ata_sg_init - Associate command with scatter-gather table. 4238c6fd2807SJeff Garzik * @qc: Command to be associated 4239c6fd2807SJeff Garzik * @sg: Scatter-gather table. 4240c6fd2807SJeff Garzik * @n_elem: Number of elements in s/g table. 4241c6fd2807SJeff Garzik * 4242c6fd2807SJeff Garzik * Initialize the data-related elements of queued_cmd @qc 4243c6fd2807SJeff Garzik * to point to a scatter-gather table @sg, containing @n_elem 4244c6fd2807SJeff Garzik * elements. 4245c6fd2807SJeff Garzik * 4246c6fd2807SJeff Garzik * LOCKING: 4247cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 4248c6fd2807SJeff Garzik */ 4249c6fd2807SJeff Garzik 4250c6fd2807SJeff Garzik void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg, 4251c6fd2807SJeff Garzik unsigned int n_elem) 4252c6fd2807SJeff Garzik { 4253c6fd2807SJeff Garzik qc->flags |= ATA_QCFLAG_SG; 4254c6fd2807SJeff Garzik qc->__sg = sg; 4255c6fd2807SJeff Garzik qc->n_elem = n_elem; 4256c6fd2807SJeff Garzik qc->orig_n_elem = n_elem; 4257c6fd2807SJeff Garzik } 4258c6fd2807SJeff Garzik 4259c6fd2807SJeff Garzik /** 4260c6fd2807SJeff Garzik * ata_sg_setup_one - DMA-map the memory buffer associated with a command. 4261c6fd2807SJeff Garzik * @qc: Command with memory buffer to be mapped. 4262c6fd2807SJeff Garzik * 4263c6fd2807SJeff Garzik * DMA-map the memory buffer associated with queued_cmd @qc. 4264c6fd2807SJeff Garzik * 4265c6fd2807SJeff Garzik * LOCKING: 4266cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 4267c6fd2807SJeff Garzik * 4268c6fd2807SJeff Garzik * RETURNS: 4269c6fd2807SJeff Garzik * Zero on success, negative on error. 4270c6fd2807SJeff Garzik */ 4271c6fd2807SJeff Garzik 4272c6fd2807SJeff Garzik static int ata_sg_setup_one(struct ata_queued_cmd *qc) 4273c6fd2807SJeff Garzik { 4274c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 4275c6fd2807SJeff Garzik int dir = qc->dma_dir; 4276c6fd2807SJeff Garzik struct scatterlist *sg = qc->__sg; 4277c6fd2807SJeff Garzik dma_addr_t dma_address; 4278c6fd2807SJeff Garzik int trim_sg = 0; 4279c6fd2807SJeff Garzik 4280c6fd2807SJeff Garzik /* we must lengthen transfers to end on a 32-bit boundary */ 4281c6fd2807SJeff Garzik qc->pad_len = sg->length & 3; 4282c6fd2807SJeff Garzik if (qc->pad_len) { 4283c6fd2807SJeff Garzik void *pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ); 4284c6fd2807SJeff Garzik struct scatterlist *psg = &qc->pad_sgent; 4285c6fd2807SJeff Garzik 4286c6fd2807SJeff Garzik WARN_ON(qc->dev->class != ATA_DEV_ATAPI); 4287c6fd2807SJeff Garzik 4288c6fd2807SJeff Garzik memset(pad_buf, 0, ATA_DMA_PAD_SZ); 4289c6fd2807SJeff Garzik 4290c6fd2807SJeff Garzik if (qc->tf.flags & ATA_TFLAG_WRITE) 4291c6fd2807SJeff Garzik memcpy(pad_buf, qc->buf_virt + sg->length - qc->pad_len, 4292c6fd2807SJeff Garzik qc->pad_len); 4293c6fd2807SJeff Garzik 4294c6fd2807SJeff Garzik sg_dma_address(psg) = ap->pad_dma + (qc->tag * ATA_DMA_PAD_SZ); 4295c6fd2807SJeff Garzik sg_dma_len(psg) = ATA_DMA_PAD_SZ; 4296c6fd2807SJeff Garzik /* trim sg */ 4297c6fd2807SJeff Garzik sg->length -= qc->pad_len; 4298c6fd2807SJeff Garzik if (sg->length == 0) 4299c6fd2807SJeff Garzik trim_sg = 1; 4300c6fd2807SJeff Garzik 4301c6fd2807SJeff Garzik DPRINTK("padding done, sg->length=%u pad_len=%u\n", 4302c6fd2807SJeff Garzik sg->length, qc->pad_len); 4303c6fd2807SJeff Garzik } 4304c6fd2807SJeff Garzik 4305c6fd2807SJeff Garzik if (trim_sg) { 4306c6fd2807SJeff Garzik qc->n_elem--; 4307c6fd2807SJeff Garzik goto skip_map; 4308c6fd2807SJeff Garzik } 4309c6fd2807SJeff Garzik 4310c6fd2807SJeff Garzik dma_address = dma_map_single(ap->dev, qc->buf_virt, 4311c6fd2807SJeff Garzik sg->length, dir); 4312c6fd2807SJeff Garzik if (dma_mapping_error(dma_address)) { 4313c6fd2807SJeff Garzik /* restore sg */ 4314c6fd2807SJeff Garzik sg->length += qc->pad_len; 4315c6fd2807SJeff Garzik return -1; 4316c6fd2807SJeff Garzik } 4317c6fd2807SJeff Garzik 4318c6fd2807SJeff Garzik sg_dma_address(sg) = dma_address; 4319c6fd2807SJeff Garzik sg_dma_len(sg) = sg->length; 4320c6fd2807SJeff Garzik 4321c6fd2807SJeff Garzik skip_map: 4322c6fd2807SJeff Garzik DPRINTK("mapped buffer of %d bytes for %s\n", sg_dma_len(sg), 4323c6fd2807SJeff Garzik qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read"); 4324c6fd2807SJeff Garzik 4325c6fd2807SJeff Garzik return 0; 4326c6fd2807SJeff Garzik } 4327c6fd2807SJeff Garzik 4328c6fd2807SJeff Garzik /** 4329c6fd2807SJeff Garzik * ata_sg_setup - DMA-map the scatter-gather table associated with a command. 4330c6fd2807SJeff Garzik * @qc: Command with scatter-gather table to be mapped. 4331c6fd2807SJeff Garzik * 4332c6fd2807SJeff Garzik * DMA-map the scatter-gather table associated with queued_cmd @qc. 4333c6fd2807SJeff Garzik * 4334c6fd2807SJeff Garzik * LOCKING: 4335cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 4336c6fd2807SJeff Garzik * 4337c6fd2807SJeff Garzik * RETURNS: 4338c6fd2807SJeff Garzik * Zero on success, negative on error. 4339c6fd2807SJeff Garzik * 4340c6fd2807SJeff Garzik */ 4341c6fd2807SJeff Garzik 4342c6fd2807SJeff Garzik static int ata_sg_setup(struct ata_queued_cmd *qc) 4343c6fd2807SJeff Garzik { 4344c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 4345c6fd2807SJeff Garzik struct scatterlist *sg = qc->__sg; 4346c6fd2807SJeff Garzik struct scatterlist *lsg = &sg[qc->n_elem - 1]; 4347c6fd2807SJeff Garzik int n_elem, pre_n_elem, dir, trim_sg = 0; 4348c6fd2807SJeff Garzik 434944877b4eSTejun Heo VPRINTK("ENTER, ata%u\n", ap->print_id); 4350c6fd2807SJeff Garzik WARN_ON(!(qc->flags & ATA_QCFLAG_SG)); 4351c6fd2807SJeff Garzik 4352c6fd2807SJeff Garzik /* we must lengthen transfers to end on a 32-bit boundary */ 4353c6fd2807SJeff Garzik qc->pad_len = lsg->length & 3; 4354c6fd2807SJeff Garzik if (qc->pad_len) { 4355c6fd2807SJeff Garzik void *pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ); 4356c6fd2807SJeff Garzik struct scatterlist *psg = &qc->pad_sgent; 4357c6fd2807SJeff Garzik unsigned int offset; 4358c6fd2807SJeff Garzik 4359c6fd2807SJeff Garzik WARN_ON(qc->dev->class != ATA_DEV_ATAPI); 4360c6fd2807SJeff Garzik 4361c6fd2807SJeff Garzik memset(pad_buf, 0, ATA_DMA_PAD_SZ); 4362c6fd2807SJeff Garzik 4363c6fd2807SJeff Garzik /* 4364c6fd2807SJeff Garzik * psg->page/offset are used to copy to-be-written 4365c6fd2807SJeff Garzik * data in this function or read data in ata_sg_clean. 4366c6fd2807SJeff Garzik */ 4367c6fd2807SJeff Garzik offset = lsg->offset + lsg->length - qc->pad_len; 4368c6fd2807SJeff Garzik psg->page = nth_page(lsg->page, offset >> PAGE_SHIFT); 4369c6fd2807SJeff Garzik psg->offset = offset_in_page(offset); 4370c6fd2807SJeff Garzik 4371c6fd2807SJeff Garzik if (qc->tf.flags & ATA_TFLAG_WRITE) { 4372c6fd2807SJeff Garzik void *addr = kmap_atomic(psg->page, KM_IRQ0); 4373c6fd2807SJeff Garzik memcpy(pad_buf, addr + psg->offset, qc->pad_len); 4374c6fd2807SJeff Garzik kunmap_atomic(addr, KM_IRQ0); 4375c6fd2807SJeff Garzik } 4376c6fd2807SJeff Garzik 4377c6fd2807SJeff Garzik sg_dma_address(psg) = ap->pad_dma + (qc->tag * ATA_DMA_PAD_SZ); 4378c6fd2807SJeff Garzik sg_dma_len(psg) = ATA_DMA_PAD_SZ; 4379c6fd2807SJeff Garzik /* trim last sg */ 4380c6fd2807SJeff Garzik lsg->length -= qc->pad_len; 4381c6fd2807SJeff Garzik if (lsg->length == 0) 4382c6fd2807SJeff Garzik trim_sg = 1; 4383c6fd2807SJeff Garzik 4384c6fd2807SJeff Garzik DPRINTK("padding done, sg[%d].length=%u pad_len=%u\n", 4385c6fd2807SJeff Garzik qc->n_elem - 1, lsg->length, qc->pad_len); 4386c6fd2807SJeff Garzik } 4387c6fd2807SJeff Garzik 4388c6fd2807SJeff Garzik pre_n_elem = qc->n_elem; 4389c6fd2807SJeff Garzik if (trim_sg && pre_n_elem) 4390c6fd2807SJeff Garzik pre_n_elem--; 4391c6fd2807SJeff Garzik 4392c6fd2807SJeff Garzik if (!pre_n_elem) { 4393c6fd2807SJeff Garzik n_elem = 0; 4394c6fd2807SJeff Garzik goto skip_map; 4395c6fd2807SJeff Garzik } 4396c6fd2807SJeff Garzik 4397c6fd2807SJeff Garzik dir = qc->dma_dir; 4398c6fd2807SJeff Garzik n_elem = dma_map_sg(ap->dev, sg, pre_n_elem, dir); 4399c6fd2807SJeff Garzik if (n_elem < 1) { 4400c6fd2807SJeff Garzik /* restore last sg */ 4401c6fd2807SJeff Garzik lsg->length += qc->pad_len; 4402c6fd2807SJeff Garzik return -1; 4403c6fd2807SJeff Garzik } 4404c6fd2807SJeff Garzik 4405c6fd2807SJeff Garzik DPRINTK("%d sg elements mapped\n", n_elem); 4406c6fd2807SJeff Garzik 4407c6fd2807SJeff Garzik skip_map: 4408c6fd2807SJeff Garzik qc->n_elem = n_elem; 4409c6fd2807SJeff Garzik 4410c6fd2807SJeff Garzik return 0; 4411c6fd2807SJeff Garzik } 4412c6fd2807SJeff Garzik 4413c6fd2807SJeff Garzik /** 4414c6fd2807SJeff Garzik * swap_buf_le16 - swap halves of 16-bit words in place 4415c6fd2807SJeff Garzik * @buf: Buffer to swap 4416c6fd2807SJeff Garzik * @buf_words: Number of 16-bit words in buffer. 4417c6fd2807SJeff Garzik * 4418c6fd2807SJeff Garzik * Swap halves of 16-bit words if needed to convert from 4419c6fd2807SJeff Garzik * little-endian byte order to native cpu byte order, or 4420c6fd2807SJeff Garzik * vice-versa. 4421c6fd2807SJeff Garzik * 4422c6fd2807SJeff Garzik * LOCKING: 4423c6fd2807SJeff Garzik * Inherited from caller. 4424c6fd2807SJeff Garzik */ 4425c6fd2807SJeff Garzik void swap_buf_le16(u16 *buf, unsigned int buf_words) 4426c6fd2807SJeff Garzik { 4427c6fd2807SJeff Garzik #ifdef __BIG_ENDIAN 4428c6fd2807SJeff Garzik unsigned int i; 4429c6fd2807SJeff Garzik 4430c6fd2807SJeff Garzik for (i = 0; i < buf_words; i++) 4431c6fd2807SJeff Garzik buf[i] = le16_to_cpu(buf[i]); 4432c6fd2807SJeff Garzik #endif /* __BIG_ENDIAN */ 4433c6fd2807SJeff Garzik } 4434c6fd2807SJeff Garzik 4435c6fd2807SJeff Garzik /** 44360d5ff566STejun Heo * ata_data_xfer - Transfer data by PIO 4437c6fd2807SJeff Garzik * @adev: device to target 4438c6fd2807SJeff Garzik * @buf: data buffer 4439c6fd2807SJeff Garzik * @buflen: buffer length 4440c6fd2807SJeff Garzik * @write_data: read/write 4441c6fd2807SJeff Garzik * 4442c6fd2807SJeff Garzik * Transfer data from/to the device data register by PIO. 4443c6fd2807SJeff Garzik * 4444c6fd2807SJeff Garzik * LOCKING: 4445c6fd2807SJeff Garzik * Inherited from caller. 4446c6fd2807SJeff Garzik */ 44470d5ff566STejun Heo void ata_data_xfer(struct ata_device *adev, unsigned char *buf, 4448c6fd2807SJeff Garzik unsigned int buflen, int write_data) 4449c6fd2807SJeff Garzik { 4450c6fd2807SJeff Garzik struct ata_port *ap = adev->ap; 4451c6fd2807SJeff Garzik unsigned int words = buflen >> 1; 4452c6fd2807SJeff Garzik 4453c6fd2807SJeff Garzik /* Transfer multiple of 2 bytes */ 4454c6fd2807SJeff Garzik if (write_data) 44550d5ff566STejun Heo iowrite16_rep(ap->ioaddr.data_addr, buf, words); 4456c6fd2807SJeff Garzik else 44570d5ff566STejun Heo ioread16_rep(ap->ioaddr.data_addr, buf, words); 4458c6fd2807SJeff Garzik 4459c6fd2807SJeff Garzik /* Transfer trailing 1 byte, if any. */ 4460c6fd2807SJeff Garzik if (unlikely(buflen & 0x01)) { 4461c6fd2807SJeff Garzik u16 align_buf[1] = { 0 }; 4462c6fd2807SJeff Garzik unsigned char *trailing_buf = buf + buflen - 1; 4463c6fd2807SJeff Garzik 4464c6fd2807SJeff Garzik if (write_data) { 4465c6fd2807SJeff Garzik memcpy(align_buf, trailing_buf, 1); 44660d5ff566STejun Heo iowrite16(le16_to_cpu(align_buf[0]), ap->ioaddr.data_addr); 4467c6fd2807SJeff Garzik } else { 44680d5ff566STejun Heo align_buf[0] = cpu_to_le16(ioread16(ap->ioaddr.data_addr)); 4469c6fd2807SJeff Garzik memcpy(trailing_buf, align_buf, 1); 4470c6fd2807SJeff Garzik } 4471c6fd2807SJeff Garzik } 4472c6fd2807SJeff Garzik } 4473c6fd2807SJeff Garzik 4474c6fd2807SJeff Garzik /** 44750d5ff566STejun Heo * ata_data_xfer_noirq - Transfer data by PIO 4476c6fd2807SJeff Garzik * @adev: device to target 4477c6fd2807SJeff Garzik * @buf: data buffer 4478c6fd2807SJeff Garzik * @buflen: buffer length 4479c6fd2807SJeff Garzik * @write_data: read/write 4480c6fd2807SJeff Garzik * 4481c6fd2807SJeff Garzik * Transfer data from/to the device data register by PIO. Do the 4482c6fd2807SJeff Garzik * transfer with interrupts disabled. 4483c6fd2807SJeff Garzik * 4484c6fd2807SJeff Garzik * LOCKING: 4485c6fd2807SJeff Garzik * Inherited from caller. 4486c6fd2807SJeff Garzik */ 44870d5ff566STejun Heo void ata_data_xfer_noirq(struct ata_device *adev, unsigned char *buf, 4488c6fd2807SJeff Garzik unsigned int buflen, int write_data) 4489c6fd2807SJeff Garzik { 4490c6fd2807SJeff Garzik unsigned long flags; 4491c6fd2807SJeff Garzik local_irq_save(flags); 44920d5ff566STejun Heo ata_data_xfer(adev, buf, buflen, write_data); 4493c6fd2807SJeff Garzik local_irq_restore(flags); 4494c6fd2807SJeff Garzik } 4495c6fd2807SJeff Garzik 4496c6fd2807SJeff Garzik 4497c6fd2807SJeff Garzik /** 44985a5dbd18SMark Lord * ata_pio_sector - Transfer a sector of data. 4499c6fd2807SJeff Garzik * @qc: Command on going 4500c6fd2807SJeff Garzik * 45015a5dbd18SMark Lord * Transfer qc->sect_size bytes of data from/to the ATA device. 4502c6fd2807SJeff Garzik * 4503c6fd2807SJeff Garzik * LOCKING: 4504c6fd2807SJeff Garzik * Inherited from caller. 4505c6fd2807SJeff Garzik */ 4506c6fd2807SJeff Garzik 4507c6fd2807SJeff Garzik static void ata_pio_sector(struct ata_queued_cmd *qc) 4508c6fd2807SJeff Garzik { 4509c6fd2807SJeff Garzik int do_write = (qc->tf.flags & ATA_TFLAG_WRITE); 4510c6fd2807SJeff Garzik struct scatterlist *sg = qc->__sg; 4511c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 4512c6fd2807SJeff Garzik struct page *page; 4513c6fd2807SJeff Garzik unsigned int offset; 4514c6fd2807SJeff Garzik unsigned char *buf; 4515c6fd2807SJeff Garzik 45165a5dbd18SMark Lord if (qc->curbytes == qc->nbytes - qc->sect_size) 4517c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_LAST; 4518c6fd2807SJeff Garzik 4519c6fd2807SJeff Garzik page = sg[qc->cursg].page; 4520726f0785STejun Heo offset = sg[qc->cursg].offset + qc->cursg_ofs; 4521c6fd2807SJeff Garzik 4522c6fd2807SJeff Garzik /* get the current page and offset */ 4523c6fd2807SJeff Garzik page = nth_page(page, (offset >> PAGE_SHIFT)); 4524c6fd2807SJeff Garzik offset %= PAGE_SIZE; 4525c6fd2807SJeff Garzik 4526c6fd2807SJeff Garzik DPRINTK("data %s\n", qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read"); 4527c6fd2807SJeff Garzik 4528c6fd2807SJeff Garzik if (PageHighMem(page)) { 4529c6fd2807SJeff Garzik unsigned long flags; 4530c6fd2807SJeff Garzik 4531c6fd2807SJeff Garzik /* FIXME: use a bounce buffer */ 4532c6fd2807SJeff Garzik local_irq_save(flags); 4533c6fd2807SJeff Garzik buf = kmap_atomic(page, KM_IRQ0); 4534c6fd2807SJeff Garzik 4535c6fd2807SJeff Garzik /* do the actual data transfer */ 45365a5dbd18SMark Lord ap->ops->data_xfer(qc->dev, buf + offset, qc->sect_size, do_write); 4537c6fd2807SJeff Garzik 4538c6fd2807SJeff Garzik kunmap_atomic(buf, KM_IRQ0); 4539c6fd2807SJeff Garzik local_irq_restore(flags); 4540c6fd2807SJeff Garzik } else { 4541c6fd2807SJeff Garzik buf = page_address(page); 45425a5dbd18SMark Lord ap->ops->data_xfer(qc->dev, buf + offset, qc->sect_size, do_write); 4543c6fd2807SJeff Garzik } 4544c6fd2807SJeff Garzik 45455a5dbd18SMark Lord qc->curbytes += qc->sect_size; 45465a5dbd18SMark Lord qc->cursg_ofs += qc->sect_size; 4547c6fd2807SJeff Garzik 4548726f0785STejun Heo if (qc->cursg_ofs == (&sg[qc->cursg])->length) { 4549c6fd2807SJeff Garzik qc->cursg++; 4550c6fd2807SJeff Garzik qc->cursg_ofs = 0; 4551c6fd2807SJeff Garzik } 4552c6fd2807SJeff Garzik } 4553c6fd2807SJeff Garzik 4554c6fd2807SJeff Garzik /** 45555a5dbd18SMark Lord * ata_pio_sectors - Transfer one or many sectors. 4556c6fd2807SJeff Garzik * @qc: Command on going 4557c6fd2807SJeff Garzik * 45585a5dbd18SMark Lord * Transfer one or many sectors of data from/to the 4559c6fd2807SJeff Garzik * ATA device for the DRQ request. 4560c6fd2807SJeff Garzik * 4561c6fd2807SJeff Garzik * LOCKING: 4562c6fd2807SJeff Garzik * Inherited from caller. 4563c6fd2807SJeff Garzik */ 4564c6fd2807SJeff Garzik 4565c6fd2807SJeff Garzik static void ata_pio_sectors(struct ata_queued_cmd *qc) 4566c6fd2807SJeff Garzik { 4567c6fd2807SJeff Garzik if (is_multi_taskfile(&qc->tf)) { 4568c6fd2807SJeff Garzik /* READ/WRITE MULTIPLE */ 4569c6fd2807SJeff Garzik unsigned int nsect; 4570c6fd2807SJeff Garzik 4571c6fd2807SJeff Garzik WARN_ON(qc->dev->multi_count == 0); 4572c6fd2807SJeff Garzik 45735a5dbd18SMark Lord nsect = min((qc->nbytes - qc->curbytes) / qc->sect_size, 4574726f0785STejun Heo qc->dev->multi_count); 4575c6fd2807SJeff Garzik while (nsect--) 4576c6fd2807SJeff Garzik ata_pio_sector(qc); 4577c6fd2807SJeff Garzik } else 4578c6fd2807SJeff Garzik ata_pio_sector(qc); 4579c6fd2807SJeff Garzik } 4580c6fd2807SJeff Garzik 4581c6fd2807SJeff Garzik /** 4582c6fd2807SJeff Garzik * atapi_send_cdb - Write CDB bytes to hardware 4583c6fd2807SJeff Garzik * @ap: Port to which ATAPI device is attached. 4584c6fd2807SJeff Garzik * @qc: Taskfile currently active 4585c6fd2807SJeff Garzik * 4586c6fd2807SJeff Garzik * When device has indicated its readiness to accept 4587c6fd2807SJeff Garzik * a CDB, this function is called. Send the CDB. 4588c6fd2807SJeff Garzik * 4589c6fd2807SJeff Garzik * LOCKING: 4590c6fd2807SJeff Garzik * caller. 4591c6fd2807SJeff Garzik */ 4592c6fd2807SJeff Garzik 4593c6fd2807SJeff Garzik static void atapi_send_cdb(struct ata_port *ap, struct ata_queued_cmd *qc) 4594c6fd2807SJeff Garzik { 4595c6fd2807SJeff Garzik /* send SCSI cdb */ 4596c6fd2807SJeff Garzik DPRINTK("send cdb\n"); 4597c6fd2807SJeff Garzik WARN_ON(qc->dev->cdb_len < 12); 4598c6fd2807SJeff Garzik 4599c6fd2807SJeff Garzik ap->ops->data_xfer(qc->dev, qc->cdb, qc->dev->cdb_len, 1); 4600c6fd2807SJeff Garzik ata_altstatus(ap); /* flush */ 4601c6fd2807SJeff Garzik 4602c6fd2807SJeff Garzik switch (qc->tf.protocol) { 4603c6fd2807SJeff Garzik case ATA_PROT_ATAPI: 4604c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST; 4605c6fd2807SJeff Garzik break; 4606c6fd2807SJeff Garzik case ATA_PROT_ATAPI_NODATA: 4607c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_LAST; 4608c6fd2807SJeff Garzik break; 4609c6fd2807SJeff Garzik case ATA_PROT_ATAPI_DMA: 4610c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_LAST; 4611c6fd2807SJeff Garzik /* initiate bmdma */ 4612c6fd2807SJeff Garzik ap->ops->bmdma_start(qc); 4613c6fd2807SJeff Garzik break; 4614c6fd2807SJeff Garzik } 4615c6fd2807SJeff Garzik } 4616c6fd2807SJeff Garzik 4617c6fd2807SJeff Garzik /** 4618c6fd2807SJeff Garzik * __atapi_pio_bytes - Transfer data from/to the ATAPI device. 4619c6fd2807SJeff Garzik * @qc: Command on going 4620c6fd2807SJeff Garzik * @bytes: number of bytes 4621c6fd2807SJeff Garzik * 4622c6fd2807SJeff Garzik * Transfer Transfer data from/to the ATAPI device. 4623c6fd2807SJeff Garzik * 4624c6fd2807SJeff Garzik * LOCKING: 4625c6fd2807SJeff Garzik * Inherited from caller. 4626c6fd2807SJeff Garzik * 4627c6fd2807SJeff Garzik */ 4628c6fd2807SJeff Garzik 4629c6fd2807SJeff Garzik static void __atapi_pio_bytes(struct ata_queued_cmd *qc, unsigned int bytes) 4630c6fd2807SJeff Garzik { 4631c6fd2807SJeff Garzik int do_write = (qc->tf.flags & ATA_TFLAG_WRITE); 4632c6fd2807SJeff Garzik struct scatterlist *sg = qc->__sg; 4633c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 4634c6fd2807SJeff Garzik struct page *page; 4635c6fd2807SJeff Garzik unsigned char *buf; 4636c6fd2807SJeff Garzik unsigned int offset, count; 4637c6fd2807SJeff Garzik 4638c6fd2807SJeff Garzik if (qc->curbytes + bytes >= qc->nbytes) 4639c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_LAST; 4640c6fd2807SJeff Garzik 4641c6fd2807SJeff Garzik next_sg: 4642c6fd2807SJeff Garzik if (unlikely(qc->cursg >= qc->n_elem)) { 4643c6fd2807SJeff Garzik /* 4644c6fd2807SJeff Garzik * The end of qc->sg is reached and the device expects 4645c6fd2807SJeff Garzik * more data to transfer. In order not to overrun qc->sg 4646c6fd2807SJeff Garzik * and fulfill length specified in the byte count register, 4647c6fd2807SJeff Garzik * - for read case, discard trailing data from the device 4648c6fd2807SJeff Garzik * - for write case, padding zero data to the device 4649c6fd2807SJeff Garzik */ 4650c6fd2807SJeff Garzik u16 pad_buf[1] = { 0 }; 4651c6fd2807SJeff Garzik unsigned int words = bytes >> 1; 4652c6fd2807SJeff Garzik unsigned int i; 4653c6fd2807SJeff Garzik 4654c6fd2807SJeff Garzik if (words) /* warning if bytes > 1 */ 4655c6fd2807SJeff Garzik ata_dev_printk(qc->dev, KERN_WARNING, 4656c6fd2807SJeff Garzik "%u bytes trailing data\n", bytes); 4657c6fd2807SJeff Garzik 4658c6fd2807SJeff Garzik for (i = 0; i < words; i++) 4659c6fd2807SJeff Garzik ap->ops->data_xfer(qc->dev, (unsigned char*)pad_buf, 2, do_write); 4660c6fd2807SJeff Garzik 4661c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_LAST; 4662c6fd2807SJeff Garzik return; 4663c6fd2807SJeff Garzik } 4664c6fd2807SJeff Garzik 4665c6fd2807SJeff Garzik sg = &qc->__sg[qc->cursg]; 4666c6fd2807SJeff Garzik 4667c6fd2807SJeff Garzik page = sg->page; 4668c6fd2807SJeff Garzik offset = sg->offset + qc->cursg_ofs; 4669c6fd2807SJeff Garzik 4670c6fd2807SJeff Garzik /* get the current page and offset */ 4671c6fd2807SJeff Garzik page = nth_page(page, (offset >> PAGE_SHIFT)); 4672c6fd2807SJeff Garzik offset %= PAGE_SIZE; 4673c6fd2807SJeff Garzik 4674c6fd2807SJeff Garzik /* don't overrun current sg */ 4675c6fd2807SJeff Garzik count = min(sg->length - qc->cursg_ofs, bytes); 4676c6fd2807SJeff Garzik 4677c6fd2807SJeff Garzik /* don't cross page boundaries */ 4678c6fd2807SJeff Garzik count = min(count, (unsigned int)PAGE_SIZE - offset); 4679c6fd2807SJeff Garzik 4680c6fd2807SJeff Garzik DPRINTK("data %s\n", qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read"); 4681c6fd2807SJeff Garzik 4682c6fd2807SJeff Garzik if (PageHighMem(page)) { 4683c6fd2807SJeff Garzik unsigned long flags; 4684c6fd2807SJeff Garzik 4685c6fd2807SJeff Garzik /* FIXME: use bounce buffer */ 4686c6fd2807SJeff Garzik local_irq_save(flags); 4687c6fd2807SJeff Garzik buf = kmap_atomic(page, KM_IRQ0); 4688c6fd2807SJeff Garzik 4689c6fd2807SJeff Garzik /* do the actual data transfer */ 4690c6fd2807SJeff Garzik ap->ops->data_xfer(qc->dev, buf + offset, count, do_write); 4691c6fd2807SJeff Garzik 4692c6fd2807SJeff Garzik kunmap_atomic(buf, KM_IRQ0); 4693c6fd2807SJeff Garzik local_irq_restore(flags); 4694c6fd2807SJeff Garzik } else { 4695c6fd2807SJeff Garzik buf = page_address(page); 4696c6fd2807SJeff Garzik ap->ops->data_xfer(qc->dev, buf + offset, count, do_write); 4697c6fd2807SJeff Garzik } 4698c6fd2807SJeff Garzik 4699c6fd2807SJeff Garzik bytes -= count; 4700c6fd2807SJeff Garzik qc->curbytes += count; 4701c6fd2807SJeff Garzik qc->cursg_ofs += count; 4702c6fd2807SJeff Garzik 4703c6fd2807SJeff Garzik if (qc->cursg_ofs == sg->length) { 4704c6fd2807SJeff Garzik qc->cursg++; 4705c6fd2807SJeff Garzik qc->cursg_ofs = 0; 4706c6fd2807SJeff Garzik } 4707c6fd2807SJeff Garzik 4708c6fd2807SJeff Garzik if (bytes) 4709c6fd2807SJeff Garzik goto next_sg; 4710c6fd2807SJeff Garzik } 4711c6fd2807SJeff Garzik 4712c6fd2807SJeff Garzik /** 4713c6fd2807SJeff Garzik * atapi_pio_bytes - Transfer data from/to the ATAPI device. 4714c6fd2807SJeff Garzik * @qc: Command on going 4715c6fd2807SJeff Garzik * 4716c6fd2807SJeff Garzik * Transfer Transfer data from/to the ATAPI device. 4717c6fd2807SJeff Garzik * 4718c6fd2807SJeff Garzik * LOCKING: 4719c6fd2807SJeff Garzik * Inherited from caller. 4720c6fd2807SJeff Garzik */ 4721c6fd2807SJeff Garzik 4722c6fd2807SJeff Garzik static void atapi_pio_bytes(struct ata_queued_cmd *qc) 4723c6fd2807SJeff Garzik { 4724c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 4725c6fd2807SJeff Garzik struct ata_device *dev = qc->dev; 4726c6fd2807SJeff Garzik unsigned int ireason, bc_lo, bc_hi, bytes; 4727c6fd2807SJeff Garzik int i_write, do_write = (qc->tf.flags & ATA_TFLAG_WRITE) ? 1 : 0; 4728c6fd2807SJeff Garzik 4729c6fd2807SJeff Garzik /* Abuse qc->result_tf for temp storage of intermediate TF 4730c6fd2807SJeff Garzik * here to save some kernel stack usage. 4731c6fd2807SJeff Garzik * For normal completion, qc->result_tf is not relevant. For 4732c6fd2807SJeff Garzik * error, qc->result_tf is later overwritten by ata_qc_complete(). 4733c6fd2807SJeff Garzik * So, the correctness of qc->result_tf is not affected. 4734c6fd2807SJeff Garzik */ 4735c6fd2807SJeff Garzik ap->ops->tf_read(ap, &qc->result_tf); 4736c6fd2807SJeff Garzik ireason = qc->result_tf.nsect; 4737c6fd2807SJeff Garzik bc_lo = qc->result_tf.lbam; 4738c6fd2807SJeff Garzik bc_hi = qc->result_tf.lbah; 4739c6fd2807SJeff Garzik bytes = (bc_hi << 8) | bc_lo; 4740c6fd2807SJeff Garzik 4741c6fd2807SJeff Garzik /* shall be cleared to zero, indicating xfer of data */ 4742c6fd2807SJeff Garzik if (ireason & (1 << 0)) 4743c6fd2807SJeff Garzik goto err_out; 4744c6fd2807SJeff Garzik 4745c6fd2807SJeff Garzik /* make sure transfer direction matches expected */ 4746c6fd2807SJeff Garzik i_write = ((ireason & (1 << 1)) == 0) ? 1 : 0; 4747c6fd2807SJeff Garzik if (do_write != i_write) 4748c6fd2807SJeff Garzik goto err_out; 4749c6fd2807SJeff Garzik 475044877b4eSTejun Heo VPRINTK("ata%u: xfering %d bytes\n", ap->print_id, bytes); 4751c6fd2807SJeff Garzik 4752c6fd2807SJeff Garzik __atapi_pio_bytes(qc, bytes); 4753c6fd2807SJeff Garzik 4754c6fd2807SJeff Garzik return; 4755c6fd2807SJeff Garzik 4756c6fd2807SJeff Garzik err_out: 4757c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_INFO, "ATAPI check failed\n"); 4758c6fd2807SJeff Garzik qc->err_mask |= AC_ERR_HSM; 4759c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_ERR; 4760c6fd2807SJeff Garzik } 4761c6fd2807SJeff Garzik 4762c6fd2807SJeff Garzik /** 4763c6fd2807SJeff Garzik * ata_hsm_ok_in_wq - Check if the qc can be handled in the workqueue. 4764c6fd2807SJeff Garzik * @ap: the target ata_port 4765c6fd2807SJeff Garzik * @qc: qc on going 4766c6fd2807SJeff Garzik * 4767c6fd2807SJeff Garzik * RETURNS: 4768c6fd2807SJeff Garzik * 1 if ok in workqueue, 0 otherwise. 4769c6fd2807SJeff Garzik */ 4770c6fd2807SJeff Garzik 4771c6fd2807SJeff Garzik static inline int ata_hsm_ok_in_wq(struct ata_port *ap, struct ata_queued_cmd *qc) 4772c6fd2807SJeff Garzik { 4773c6fd2807SJeff Garzik if (qc->tf.flags & ATA_TFLAG_POLLING) 4774c6fd2807SJeff Garzik return 1; 4775c6fd2807SJeff Garzik 4776c6fd2807SJeff Garzik if (ap->hsm_task_state == HSM_ST_FIRST) { 4777c6fd2807SJeff Garzik if (qc->tf.protocol == ATA_PROT_PIO && 4778c6fd2807SJeff Garzik (qc->tf.flags & ATA_TFLAG_WRITE)) 4779c6fd2807SJeff Garzik return 1; 4780c6fd2807SJeff Garzik 4781c6fd2807SJeff Garzik if (is_atapi_taskfile(&qc->tf) && 4782c6fd2807SJeff Garzik !(qc->dev->flags & ATA_DFLAG_CDB_INTR)) 4783c6fd2807SJeff Garzik return 1; 4784c6fd2807SJeff Garzik } 4785c6fd2807SJeff Garzik 4786c6fd2807SJeff Garzik return 0; 4787c6fd2807SJeff Garzik } 4788c6fd2807SJeff Garzik 4789c6fd2807SJeff Garzik /** 4790c6fd2807SJeff Garzik * ata_hsm_qc_complete - finish a qc running on standard HSM 4791c6fd2807SJeff Garzik * @qc: Command to complete 4792c6fd2807SJeff Garzik * @in_wq: 1 if called from workqueue, 0 otherwise 4793c6fd2807SJeff Garzik * 4794c6fd2807SJeff Garzik * Finish @qc which is running on standard HSM. 4795c6fd2807SJeff Garzik * 4796c6fd2807SJeff Garzik * LOCKING: 4797cca3974eSJeff Garzik * If @in_wq is zero, spin_lock_irqsave(host lock). 4798c6fd2807SJeff Garzik * Otherwise, none on entry and grabs host lock. 4799c6fd2807SJeff Garzik */ 4800c6fd2807SJeff Garzik static void ata_hsm_qc_complete(struct ata_queued_cmd *qc, int in_wq) 4801c6fd2807SJeff Garzik { 4802c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 4803c6fd2807SJeff Garzik unsigned long flags; 4804c6fd2807SJeff Garzik 4805c6fd2807SJeff Garzik if (ap->ops->error_handler) { 4806c6fd2807SJeff Garzik if (in_wq) { 4807c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 4808c6fd2807SJeff Garzik 4809cca3974eSJeff Garzik /* EH might have kicked in while host lock is 4810cca3974eSJeff Garzik * released. 4811c6fd2807SJeff Garzik */ 4812c6fd2807SJeff Garzik qc = ata_qc_from_tag(ap, qc->tag); 4813c6fd2807SJeff Garzik if (qc) { 4814c6fd2807SJeff Garzik if (likely(!(qc->err_mask & AC_ERR_HSM))) { 481583625006SAkira Iguchi ap->ops->irq_on(ap); 4816c6fd2807SJeff Garzik ata_qc_complete(qc); 4817c6fd2807SJeff Garzik } else 4818c6fd2807SJeff Garzik ata_port_freeze(ap); 4819c6fd2807SJeff Garzik } 4820c6fd2807SJeff Garzik 4821c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 4822c6fd2807SJeff Garzik } else { 4823c6fd2807SJeff Garzik if (likely(!(qc->err_mask & AC_ERR_HSM))) 4824c6fd2807SJeff Garzik ata_qc_complete(qc); 4825c6fd2807SJeff Garzik else 4826c6fd2807SJeff Garzik ata_port_freeze(ap); 4827c6fd2807SJeff Garzik } 4828c6fd2807SJeff Garzik } else { 4829c6fd2807SJeff Garzik if (in_wq) { 4830c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 483183625006SAkira Iguchi ap->ops->irq_on(ap); 4832c6fd2807SJeff Garzik ata_qc_complete(qc); 4833c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 4834c6fd2807SJeff Garzik } else 4835c6fd2807SJeff Garzik ata_qc_complete(qc); 4836c6fd2807SJeff Garzik } 4837c6fd2807SJeff Garzik } 4838c6fd2807SJeff Garzik 4839c6fd2807SJeff Garzik /** 4840c6fd2807SJeff Garzik * ata_hsm_move - move the HSM to the next state. 4841c6fd2807SJeff Garzik * @ap: the target ata_port 4842c6fd2807SJeff Garzik * @qc: qc on going 4843c6fd2807SJeff Garzik * @status: current device status 4844c6fd2807SJeff Garzik * @in_wq: 1 if called from workqueue, 0 otherwise 4845c6fd2807SJeff Garzik * 4846c6fd2807SJeff Garzik * RETURNS: 4847c6fd2807SJeff Garzik * 1 when poll next status needed, 0 otherwise. 4848c6fd2807SJeff Garzik */ 4849c6fd2807SJeff Garzik int ata_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc, 4850c6fd2807SJeff Garzik u8 status, int in_wq) 4851c6fd2807SJeff Garzik { 4852c6fd2807SJeff Garzik unsigned long flags = 0; 4853c6fd2807SJeff Garzik int poll_next; 4854c6fd2807SJeff Garzik 4855c6fd2807SJeff Garzik WARN_ON((qc->flags & ATA_QCFLAG_ACTIVE) == 0); 4856c6fd2807SJeff Garzik 4857c6fd2807SJeff Garzik /* Make sure ata_qc_issue_prot() does not throw things 4858c6fd2807SJeff Garzik * like DMA polling into the workqueue. Notice that 4859c6fd2807SJeff Garzik * in_wq is not equivalent to (qc->tf.flags & ATA_TFLAG_POLLING). 4860c6fd2807SJeff Garzik */ 4861c6fd2807SJeff Garzik WARN_ON(in_wq != ata_hsm_ok_in_wq(ap, qc)); 4862c6fd2807SJeff Garzik 4863c6fd2807SJeff Garzik fsm_start: 4864c6fd2807SJeff Garzik DPRINTK("ata%u: protocol %d task_state %d (dev_stat 0x%X)\n", 486544877b4eSTejun Heo ap->print_id, qc->tf.protocol, ap->hsm_task_state, status); 4866c6fd2807SJeff Garzik 4867c6fd2807SJeff Garzik switch (ap->hsm_task_state) { 4868c6fd2807SJeff Garzik case HSM_ST_FIRST: 4869c6fd2807SJeff Garzik /* Send first data block or PACKET CDB */ 4870c6fd2807SJeff Garzik 4871c6fd2807SJeff Garzik /* If polling, we will stay in the work queue after 4872c6fd2807SJeff Garzik * sending the data. Otherwise, interrupt handler 4873c6fd2807SJeff Garzik * takes over after sending the data. 4874c6fd2807SJeff Garzik */ 4875c6fd2807SJeff Garzik poll_next = (qc->tf.flags & ATA_TFLAG_POLLING); 4876c6fd2807SJeff Garzik 4877c6fd2807SJeff Garzik /* check device status */ 4878c6fd2807SJeff Garzik if (unlikely((status & ATA_DRQ) == 0)) { 4879c6fd2807SJeff Garzik /* handle BSY=0, DRQ=0 as error */ 4880c6fd2807SJeff Garzik if (likely(status & (ATA_ERR | ATA_DF))) 4881c6fd2807SJeff Garzik /* device stops HSM for abort/error */ 4882c6fd2807SJeff Garzik qc->err_mask |= AC_ERR_DEV; 4883c6fd2807SJeff Garzik else 4884c6fd2807SJeff Garzik /* HSM violation. Let EH handle this */ 4885c6fd2807SJeff Garzik qc->err_mask |= AC_ERR_HSM; 4886c6fd2807SJeff Garzik 4887c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_ERR; 4888c6fd2807SJeff Garzik goto fsm_start; 4889c6fd2807SJeff Garzik } 4890c6fd2807SJeff Garzik 4891c6fd2807SJeff Garzik /* Device should not ask for data transfer (DRQ=1) 4892c6fd2807SJeff Garzik * when it finds something wrong. 4893c6fd2807SJeff Garzik * We ignore DRQ here and stop the HSM by 4894c6fd2807SJeff Garzik * changing hsm_task_state to HSM_ST_ERR and 4895c6fd2807SJeff Garzik * let the EH abort the command or reset the device. 4896c6fd2807SJeff Garzik */ 4897c6fd2807SJeff Garzik if (unlikely(status & (ATA_ERR | ATA_DF))) { 489844877b4eSTejun Heo ata_port_printk(ap, KERN_WARNING, "DRQ=1 with device " 489944877b4eSTejun Heo "error, dev_stat 0x%X\n", status); 4900c6fd2807SJeff Garzik qc->err_mask |= AC_ERR_HSM; 4901c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_ERR; 4902c6fd2807SJeff Garzik goto fsm_start; 4903c6fd2807SJeff Garzik } 4904c6fd2807SJeff Garzik 4905c6fd2807SJeff Garzik /* Send the CDB (atapi) or the first data block (ata pio out). 4906c6fd2807SJeff Garzik * During the state transition, interrupt handler shouldn't 4907c6fd2807SJeff Garzik * be invoked before the data transfer is complete and 4908c6fd2807SJeff Garzik * hsm_task_state is changed. Hence, the following locking. 4909c6fd2807SJeff Garzik */ 4910c6fd2807SJeff Garzik if (in_wq) 4911c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 4912c6fd2807SJeff Garzik 4913c6fd2807SJeff Garzik if (qc->tf.protocol == ATA_PROT_PIO) { 4914c6fd2807SJeff Garzik /* PIO data out protocol. 4915c6fd2807SJeff Garzik * send first data block. 4916c6fd2807SJeff Garzik */ 4917c6fd2807SJeff Garzik 4918c6fd2807SJeff Garzik /* ata_pio_sectors() might change the state 4919c6fd2807SJeff Garzik * to HSM_ST_LAST. so, the state is changed here 4920c6fd2807SJeff Garzik * before ata_pio_sectors(). 4921c6fd2807SJeff Garzik */ 4922c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST; 4923c6fd2807SJeff Garzik ata_pio_sectors(qc); 4924c6fd2807SJeff Garzik ata_altstatus(ap); /* flush */ 4925c6fd2807SJeff Garzik } else 4926c6fd2807SJeff Garzik /* send CDB */ 4927c6fd2807SJeff Garzik atapi_send_cdb(ap, qc); 4928c6fd2807SJeff Garzik 4929c6fd2807SJeff Garzik if (in_wq) 4930c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 4931c6fd2807SJeff Garzik 4932c6fd2807SJeff Garzik /* if polling, ata_pio_task() handles the rest. 4933c6fd2807SJeff Garzik * otherwise, interrupt handler takes over from here. 4934c6fd2807SJeff Garzik */ 4935c6fd2807SJeff Garzik break; 4936c6fd2807SJeff Garzik 4937c6fd2807SJeff Garzik case HSM_ST: 4938c6fd2807SJeff Garzik /* complete command or read/write the data register */ 4939c6fd2807SJeff Garzik if (qc->tf.protocol == ATA_PROT_ATAPI) { 4940c6fd2807SJeff Garzik /* ATAPI PIO protocol */ 4941c6fd2807SJeff Garzik if ((status & ATA_DRQ) == 0) { 4942c6fd2807SJeff Garzik /* No more data to transfer or device error. 4943c6fd2807SJeff Garzik * Device error will be tagged in HSM_ST_LAST. 4944c6fd2807SJeff Garzik */ 4945c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_LAST; 4946c6fd2807SJeff Garzik goto fsm_start; 4947c6fd2807SJeff Garzik } 4948c6fd2807SJeff Garzik 4949c6fd2807SJeff Garzik /* Device should not ask for data transfer (DRQ=1) 4950c6fd2807SJeff Garzik * when it finds something wrong. 4951c6fd2807SJeff Garzik * We ignore DRQ here and stop the HSM by 4952c6fd2807SJeff Garzik * changing hsm_task_state to HSM_ST_ERR and 4953c6fd2807SJeff Garzik * let the EH abort the command or reset the device. 4954c6fd2807SJeff Garzik */ 4955c6fd2807SJeff Garzik if (unlikely(status & (ATA_ERR | ATA_DF))) { 495644877b4eSTejun Heo ata_port_printk(ap, KERN_WARNING, "DRQ=1 with " 495744877b4eSTejun Heo "device error, dev_stat 0x%X\n", 495844877b4eSTejun Heo status); 4959c6fd2807SJeff Garzik qc->err_mask |= AC_ERR_HSM; 4960c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_ERR; 4961c6fd2807SJeff Garzik goto fsm_start; 4962c6fd2807SJeff Garzik } 4963c6fd2807SJeff Garzik 4964c6fd2807SJeff Garzik atapi_pio_bytes(qc); 4965c6fd2807SJeff Garzik 4966c6fd2807SJeff Garzik if (unlikely(ap->hsm_task_state == HSM_ST_ERR)) 4967c6fd2807SJeff Garzik /* bad ireason reported by device */ 4968c6fd2807SJeff Garzik goto fsm_start; 4969c6fd2807SJeff Garzik 4970c6fd2807SJeff Garzik } else { 4971c6fd2807SJeff Garzik /* ATA PIO protocol */ 4972c6fd2807SJeff Garzik if (unlikely((status & ATA_DRQ) == 0)) { 4973c6fd2807SJeff Garzik /* handle BSY=0, DRQ=0 as error */ 4974c6fd2807SJeff Garzik if (likely(status & (ATA_ERR | ATA_DF))) 4975c6fd2807SJeff Garzik /* device stops HSM for abort/error */ 4976c6fd2807SJeff Garzik qc->err_mask |= AC_ERR_DEV; 4977c6fd2807SJeff Garzik else 497855a8e2c8STejun Heo /* HSM violation. Let EH handle this. 497955a8e2c8STejun Heo * Phantom devices also trigger this 498055a8e2c8STejun Heo * condition. Mark hint. 498155a8e2c8STejun Heo */ 498255a8e2c8STejun Heo qc->err_mask |= AC_ERR_HSM | 498355a8e2c8STejun Heo AC_ERR_NODEV_HINT; 4984c6fd2807SJeff Garzik 4985c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_ERR; 4986c6fd2807SJeff Garzik goto fsm_start; 4987c6fd2807SJeff Garzik } 4988c6fd2807SJeff Garzik 4989c6fd2807SJeff Garzik /* For PIO reads, some devices may ask for 4990c6fd2807SJeff Garzik * data transfer (DRQ=1) alone with ERR=1. 4991c6fd2807SJeff Garzik * We respect DRQ here and transfer one 4992c6fd2807SJeff Garzik * block of junk data before changing the 4993c6fd2807SJeff Garzik * hsm_task_state to HSM_ST_ERR. 4994c6fd2807SJeff Garzik * 4995c6fd2807SJeff Garzik * For PIO writes, ERR=1 DRQ=1 doesn't make 4996c6fd2807SJeff Garzik * sense since the data block has been 4997c6fd2807SJeff Garzik * transferred to the device. 4998c6fd2807SJeff Garzik */ 4999c6fd2807SJeff Garzik if (unlikely(status & (ATA_ERR | ATA_DF))) { 5000c6fd2807SJeff Garzik /* data might be corrputed */ 5001c6fd2807SJeff Garzik qc->err_mask |= AC_ERR_DEV; 5002c6fd2807SJeff Garzik 5003c6fd2807SJeff Garzik if (!(qc->tf.flags & ATA_TFLAG_WRITE)) { 5004c6fd2807SJeff Garzik ata_pio_sectors(qc); 5005c6fd2807SJeff Garzik ata_altstatus(ap); 5006c6fd2807SJeff Garzik status = ata_wait_idle(ap); 5007c6fd2807SJeff Garzik } 5008c6fd2807SJeff Garzik 5009c6fd2807SJeff Garzik if (status & (ATA_BUSY | ATA_DRQ)) 5010c6fd2807SJeff Garzik qc->err_mask |= AC_ERR_HSM; 5011c6fd2807SJeff Garzik 5012c6fd2807SJeff Garzik /* ata_pio_sectors() might change the 5013c6fd2807SJeff Garzik * state to HSM_ST_LAST. so, the state 5014c6fd2807SJeff Garzik * is changed after ata_pio_sectors(). 5015c6fd2807SJeff Garzik */ 5016c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_ERR; 5017c6fd2807SJeff Garzik goto fsm_start; 5018c6fd2807SJeff Garzik } 5019c6fd2807SJeff Garzik 5020c6fd2807SJeff Garzik ata_pio_sectors(qc); 5021c6fd2807SJeff Garzik 5022c6fd2807SJeff Garzik if (ap->hsm_task_state == HSM_ST_LAST && 5023c6fd2807SJeff Garzik (!(qc->tf.flags & ATA_TFLAG_WRITE))) { 5024c6fd2807SJeff Garzik /* all data read */ 5025c6fd2807SJeff Garzik ata_altstatus(ap); 5026c6fd2807SJeff Garzik status = ata_wait_idle(ap); 5027c6fd2807SJeff Garzik goto fsm_start; 5028c6fd2807SJeff Garzik } 5029c6fd2807SJeff Garzik } 5030c6fd2807SJeff Garzik 5031c6fd2807SJeff Garzik ata_altstatus(ap); /* flush */ 5032c6fd2807SJeff Garzik poll_next = 1; 5033c6fd2807SJeff Garzik break; 5034c6fd2807SJeff Garzik 5035c6fd2807SJeff Garzik case HSM_ST_LAST: 5036c6fd2807SJeff Garzik if (unlikely(!ata_ok(status))) { 5037c6fd2807SJeff Garzik qc->err_mask |= __ac_err_mask(status); 5038c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_ERR; 5039c6fd2807SJeff Garzik goto fsm_start; 5040c6fd2807SJeff Garzik } 5041c6fd2807SJeff Garzik 5042c6fd2807SJeff Garzik /* no more data to transfer */ 5043c6fd2807SJeff Garzik DPRINTK("ata%u: dev %u command complete, drv_stat 0x%x\n", 504444877b4eSTejun Heo ap->print_id, qc->dev->devno, status); 5045c6fd2807SJeff Garzik 5046c6fd2807SJeff Garzik WARN_ON(qc->err_mask); 5047c6fd2807SJeff Garzik 5048c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_IDLE; 5049c6fd2807SJeff Garzik 5050c6fd2807SJeff Garzik /* complete taskfile transaction */ 5051c6fd2807SJeff Garzik ata_hsm_qc_complete(qc, in_wq); 5052c6fd2807SJeff Garzik 5053c6fd2807SJeff Garzik poll_next = 0; 5054c6fd2807SJeff Garzik break; 5055c6fd2807SJeff Garzik 5056c6fd2807SJeff Garzik case HSM_ST_ERR: 5057c6fd2807SJeff Garzik /* make sure qc->err_mask is available to 5058c6fd2807SJeff Garzik * know what's wrong and recover 5059c6fd2807SJeff Garzik */ 5060c6fd2807SJeff Garzik WARN_ON(qc->err_mask == 0); 5061c6fd2807SJeff Garzik 5062c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_IDLE; 5063c6fd2807SJeff Garzik 5064c6fd2807SJeff Garzik /* complete taskfile transaction */ 5065c6fd2807SJeff Garzik ata_hsm_qc_complete(qc, in_wq); 5066c6fd2807SJeff Garzik 5067c6fd2807SJeff Garzik poll_next = 0; 5068c6fd2807SJeff Garzik break; 5069c6fd2807SJeff Garzik default: 5070c6fd2807SJeff Garzik poll_next = 0; 5071c6fd2807SJeff Garzik BUG(); 5072c6fd2807SJeff Garzik } 5073c6fd2807SJeff Garzik 5074c6fd2807SJeff Garzik return poll_next; 5075c6fd2807SJeff Garzik } 5076c6fd2807SJeff Garzik 507765f27f38SDavid Howells static void ata_pio_task(struct work_struct *work) 5078c6fd2807SJeff Garzik { 507965f27f38SDavid Howells struct ata_port *ap = 508065f27f38SDavid Howells container_of(work, struct ata_port, port_task.work); 508165f27f38SDavid Howells struct ata_queued_cmd *qc = ap->port_task_data; 5082c6fd2807SJeff Garzik u8 status; 5083c6fd2807SJeff Garzik int poll_next; 5084c6fd2807SJeff Garzik 5085c6fd2807SJeff Garzik fsm_start: 5086c6fd2807SJeff Garzik WARN_ON(ap->hsm_task_state == HSM_ST_IDLE); 5087c6fd2807SJeff Garzik 5088c6fd2807SJeff Garzik /* 5089c6fd2807SJeff Garzik * This is purely heuristic. This is a fast path. 5090c6fd2807SJeff Garzik * Sometimes when we enter, BSY will be cleared in 5091c6fd2807SJeff Garzik * a chk-status or two. If not, the drive is probably seeking 5092c6fd2807SJeff Garzik * or something. Snooze for a couple msecs, then 5093c6fd2807SJeff Garzik * chk-status again. If still busy, queue delayed work. 5094c6fd2807SJeff Garzik */ 5095c6fd2807SJeff Garzik status = ata_busy_wait(ap, ATA_BUSY, 5); 5096c6fd2807SJeff Garzik if (status & ATA_BUSY) { 5097c6fd2807SJeff Garzik msleep(2); 5098c6fd2807SJeff Garzik status = ata_busy_wait(ap, ATA_BUSY, 10); 5099c6fd2807SJeff Garzik if (status & ATA_BUSY) { 5100c6fd2807SJeff Garzik ata_port_queue_task(ap, ata_pio_task, qc, ATA_SHORT_PAUSE); 5101c6fd2807SJeff Garzik return; 5102c6fd2807SJeff Garzik } 5103c6fd2807SJeff Garzik } 5104c6fd2807SJeff Garzik 5105c6fd2807SJeff Garzik /* move the HSM */ 5106c6fd2807SJeff Garzik poll_next = ata_hsm_move(ap, qc, status, 1); 5107c6fd2807SJeff Garzik 5108c6fd2807SJeff Garzik /* another command or interrupt handler 5109c6fd2807SJeff Garzik * may be running at this point. 5110c6fd2807SJeff Garzik */ 5111c6fd2807SJeff Garzik if (poll_next) 5112c6fd2807SJeff Garzik goto fsm_start; 5113c6fd2807SJeff Garzik } 5114c6fd2807SJeff Garzik 5115c6fd2807SJeff Garzik /** 5116c6fd2807SJeff Garzik * ata_qc_new - Request an available ATA command, for queueing 5117c6fd2807SJeff Garzik * @ap: Port associated with device @dev 5118c6fd2807SJeff Garzik * @dev: Device from whom we request an available command structure 5119c6fd2807SJeff Garzik * 5120c6fd2807SJeff Garzik * LOCKING: 5121c6fd2807SJeff Garzik * None. 5122c6fd2807SJeff Garzik */ 5123c6fd2807SJeff Garzik 5124c6fd2807SJeff Garzik static struct ata_queued_cmd *ata_qc_new(struct ata_port *ap) 5125c6fd2807SJeff Garzik { 5126c6fd2807SJeff Garzik struct ata_queued_cmd *qc = NULL; 5127c6fd2807SJeff Garzik unsigned int i; 5128c6fd2807SJeff Garzik 5129c6fd2807SJeff Garzik /* no command while frozen */ 5130c6fd2807SJeff Garzik if (unlikely(ap->pflags & ATA_PFLAG_FROZEN)) 5131c6fd2807SJeff Garzik return NULL; 5132c6fd2807SJeff Garzik 5133c6fd2807SJeff Garzik /* the last tag is reserved for internal command. */ 5134c6fd2807SJeff Garzik for (i = 0; i < ATA_MAX_QUEUE - 1; i++) 5135c6fd2807SJeff Garzik if (!test_and_set_bit(i, &ap->qc_allocated)) { 5136c6fd2807SJeff Garzik qc = __ata_qc_from_tag(ap, i); 5137c6fd2807SJeff Garzik break; 5138c6fd2807SJeff Garzik } 5139c6fd2807SJeff Garzik 5140c6fd2807SJeff Garzik if (qc) 5141c6fd2807SJeff Garzik qc->tag = i; 5142c6fd2807SJeff Garzik 5143c6fd2807SJeff Garzik return qc; 5144c6fd2807SJeff Garzik } 5145c6fd2807SJeff Garzik 5146c6fd2807SJeff Garzik /** 5147c6fd2807SJeff Garzik * ata_qc_new_init - Request an available ATA command, and initialize it 5148c6fd2807SJeff Garzik * @dev: Device from whom we request an available command structure 5149c6fd2807SJeff Garzik * 5150c6fd2807SJeff Garzik * LOCKING: 5151c6fd2807SJeff Garzik * None. 5152c6fd2807SJeff Garzik */ 5153c6fd2807SJeff Garzik 5154c6fd2807SJeff Garzik struct ata_queued_cmd *ata_qc_new_init(struct ata_device *dev) 5155c6fd2807SJeff Garzik { 5156c6fd2807SJeff Garzik struct ata_port *ap = dev->ap; 5157c6fd2807SJeff Garzik struct ata_queued_cmd *qc; 5158c6fd2807SJeff Garzik 5159c6fd2807SJeff Garzik qc = ata_qc_new(ap); 5160c6fd2807SJeff Garzik if (qc) { 5161c6fd2807SJeff Garzik qc->scsicmd = NULL; 5162c6fd2807SJeff Garzik qc->ap = ap; 5163c6fd2807SJeff Garzik qc->dev = dev; 5164c6fd2807SJeff Garzik 5165c6fd2807SJeff Garzik ata_qc_reinit(qc); 5166c6fd2807SJeff Garzik } 5167c6fd2807SJeff Garzik 5168c6fd2807SJeff Garzik return qc; 5169c6fd2807SJeff Garzik } 5170c6fd2807SJeff Garzik 5171c6fd2807SJeff Garzik /** 5172c6fd2807SJeff Garzik * ata_qc_free - free unused ata_queued_cmd 5173c6fd2807SJeff Garzik * @qc: Command to complete 5174c6fd2807SJeff Garzik * 5175c6fd2807SJeff Garzik * Designed to free unused ata_queued_cmd object 5176c6fd2807SJeff Garzik * in case something prevents using it. 5177c6fd2807SJeff Garzik * 5178c6fd2807SJeff Garzik * LOCKING: 5179cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 5180c6fd2807SJeff Garzik */ 5181c6fd2807SJeff Garzik void ata_qc_free(struct ata_queued_cmd *qc) 5182c6fd2807SJeff Garzik { 5183c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 5184c6fd2807SJeff Garzik unsigned int tag; 5185c6fd2807SJeff Garzik 5186c6fd2807SJeff Garzik WARN_ON(qc == NULL); /* ata_qc_from_tag _might_ return NULL */ 5187c6fd2807SJeff Garzik 5188c6fd2807SJeff Garzik qc->flags = 0; 5189c6fd2807SJeff Garzik tag = qc->tag; 5190c6fd2807SJeff Garzik if (likely(ata_tag_valid(tag))) { 5191c6fd2807SJeff Garzik qc->tag = ATA_TAG_POISON; 5192c6fd2807SJeff Garzik clear_bit(tag, &ap->qc_allocated); 5193c6fd2807SJeff Garzik } 5194c6fd2807SJeff Garzik } 5195c6fd2807SJeff Garzik 5196c6fd2807SJeff Garzik void __ata_qc_complete(struct ata_queued_cmd *qc) 5197c6fd2807SJeff Garzik { 5198c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 5199c6fd2807SJeff Garzik 5200c6fd2807SJeff Garzik WARN_ON(qc == NULL); /* ata_qc_from_tag _might_ return NULL */ 5201c6fd2807SJeff Garzik WARN_ON(!(qc->flags & ATA_QCFLAG_ACTIVE)); 5202c6fd2807SJeff Garzik 5203c6fd2807SJeff Garzik if (likely(qc->flags & ATA_QCFLAG_DMAMAP)) 5204c6fd2807SJeff Garzik ata_sg_clean(qc); 5205c6fd2807SJeff Garzik 5206c6fd2807SJeff Garzik /* command should be marked inactive atomically with qc completion */ 5207c6fd2807SJeff Garzik if (qc->tf.protocol == ATA_PROT_NCQ) 5208c6fd2807SJeff Garzik ap->sactive &= ~(1 << qc->tag); 5209c6fd2807SJeff Garzik else 5210c6fd2807SJeff Garzik ap->active_tag = ATA_TAG_POISON; 5211c6fd2807SJeff Garzik 5212c6fd2807SJeff Garzik /* atapi: mark qc as inactive to prevent the interrupt handler 5213c6fd2807SJeff Garzik * from completing the command twice later, before the error handler 5214c6fd2807SJeff Garzik * is called. (when rc != 0 and atapi request sense is needed) 5215c6fd2807SJeff Garzik */ 5216c6fd2807SJeff Garzik qc->flags &= ~ATA_QCFLAG_ACTIVE; 5217c6fd2807SJeff Garzik ap->qc_active &= ~(1 << qc->tag); 5218c6fd2807SJeff Garzik 5219c6fd2807SJeff Garzik /* call completion callback */ 5220c6fd2807SJeff Garzik qc->complete_fn(qc); 5221c6fd2807SJeff Garzik } 5222c6fd2807SJeff Garzik 522339599a53STejun Heo static void fill_result_tf(struct ata_queued_cmd *qc) 522439599a53STejun Heo { 522539599a53STejun Heo struct ata_port *ap = qc->ap; 522639599a53STejun Heo 522739599a53STejun Heo qc->result_tf.flags = qc->tf.flags; 52284742d54fSMark Lord ap->ops->tf_read(ap, &qc->result_tf); 522939599a53STejun Heo } 523039599a53STejun Heo 5231c6fd2807SJeff Garzik /** 5232c6fd2807SJeff Garzik * ata_qc_complete - Complete an active ATA command 5233c6fd2807SJeff Garzik * @qc: Command to complete 5234c6fd2807SJeff Garzik * @err_mask: ATA Status register contents 5235c6fd2807SJeff Garzik * 5236c6fd2807SJeff Garzik * Indicate to the mid and upper layers that an ATA 5237c6fd2807SJeff Garzik * command has completed, with either an ok or not-ok status. 5238c6fd2807SJeff Garzik * 5239c6fd2807SJeff Garzik * LOCKING: 5240cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 5241c6fd2807SJeff Garzik */ 5242c6fd2807SJeff Garzik void ata_qc_complete(struct ata_queued_cmd *qc) 5243c6fd2807SJeff Garzik { 5244c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 5245c6fd2807SJeff Garzik 5246c6fd2807SJeff Garzik /* XXX: New EH and old EH use different mechanisms to 5247c6fd2807SJeff Garzik * synchronize EH with regular execution path. 5248c6fd2807SJeff Garzik * 5249c6fd2807SJeff Garzik * In new EH, a failed qc is marked with ATA_QCFLAG_FAILED. 5250c6fd2807SJeff Garzik * Normal execution path is responsible for not accessing a 5251c6fd2807SJeff Garzik * failed qc. libata core enforces the rule by returning NULL 5252c6fd2807SJeff Garzik * from ata_qc_from_tag() for failed qcs. 5253c6fd2807SJeff Garzik * 5254c6fd2807SJeff Garzik * Old EH depends on ata_qc_complete() nullifying completion 5255c6fd2807SJeff Garzik * requests if ATA_QCFLAG_EH_SCHEDULED is set. Old EH does 5256c6fd2807SJeff Garzik * not synchronize with interrupt handler. Only PIO task is 5257c6fd2807SJeff Garzik * taken care of. 5258c6fd2807SJeff Garzik */ 5259c6fd2807SJeff Garzik if (ap->ops->error_handler) { 5260c6fd2807SJeff Garzik WARN_ON(ap->pflags & ATA_PFLAG_FROZEN); 5261c6fd2807SJeff Garzik 5262c6fd2807SJeff Garzik if (unlikely(qc->err_mask)) 5263c6fd2807SJeff Garzik qc->flags |= ATA_QCFLAG_FAILED; 5264c6fd2807SJeff Garzik 5265c6fd2807SJeff Garzik if (unlikely(qc->flags & ATA_QCFLAG_FAILED)) { 5266c6fd2807SJeff Garzik if (!ata_tag_internal(qc->tag)) { 5267c6fd2807SJeff Garzik /* always fill result TF for failed qc */ 526839599a53STejun Heo fill_result_tf(qc); 5269c6fd2807SJeff Garzik ata_qc_schedule_eh(qc); 5270c6fd2807SJeff Garzik return; 5271c6fd2807SJeff Garzik } 5272c6fd2807SJeff Garzik } 5273c6fd2807SJeff Garzik 5274c6fd2807SJeff Garzik /* read result TF if requested */ 5275c6fd2807SJeff Garzik if (qc->flags & ATA_QCFLAG_RESULT_TF) 527639599a53STejun Heo fill_result_tf(qc); 5277c6fd2807SJeff Garzik 5278c6fd2807SJeff Garzik __ata_qc_complete(qc); 5279c6fd2807SJeff Garzik } else { 5280c6fd2807SJeff Garzik if (qc->flags & ATA_QCFLAG_EH_SCHEDULED) 5281c6fd2807SJeff Garzik return; 5282c6fd2807SJeff Garzik 5283c6fd2807SJeff Garzik /* read result TF if failed or requested */ 5284c6fd2807SJeff Garzik if (qc->err_mask || qc->flags & ATA_QCFLAG_RESULT_TF) 528539599a53STejun Heo fill_result_tf(qc); 5286c6fd2807SJeff Garzik 5287c6fd2807SJeff Garzik __ata_qc_complete(qc); 5288c6fd2807SJeff Garzik } 5289c6fd2807SJeff Garzik } 5290c6fd2807SJeff Garzik 5291c6fd2807SJeff Garzik /** 5292c6fd2807SJeff Garzik * ata_qc_complete_multiple - Complete multiple qcs successfully 5293c6fd2807SJeff Garzik * @ap: port in question 5294c6fd2807SJeff Garzik * @qc_active: new qc_active mask 5295c6fd2807SJeff Garzik * @finish_qc: LLDD callback invoked before completing a qc 5296c6fd2807SJeff Garzik * 5297c6fd2807SJeff Garzik * Complete in-flight commands. This functions is meant to be 5298c6fd2807SJeff Garzik * called from low-level driver's interrupt routine to complete 5299c6fd2807SJeff Garzik * requests normally. ap->qc_active and @qc_active is compared 5300c6fd2807SJeff Garzik * and commands are completed accordingly. 5301c6fd2807SJeff Garzik * 5302c6fd2807SJeff Garzik * LOCKING: 5303cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 5304c6fd2807SJeff Garzik * 5305c6fd2807SJeff Garzik * RETURNS: 5306c6fd2807SJeff Garzik * Number of completed commands on success, -errno otherwise. 5307c6fd2807SJeff Garzik */ 5308c6fd2807SJeff Garzik int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active, 5309c6fd2807SJeff Garzik void (*finish_qc)(struct ata_queued_cmd *)) 5310c6fd2807SJeff Garzik { 5311c6fd2807SJeff Garzik int nr_done = 0; 5312c6fd2807SJeff Garzik u32 done_mask; 5313c6fd2807SJeff Garzik int i; 5314c6fd2807SJeff Garzik 5315c6fd2807SJeff Garzik done_mask = ap->qc_active ^ qc_active; 5316c6fd2807SJeff Garzik 5317c6fd2807SJeff Garzik if (unlikely(done_mask & qc_active)) { 5318c6fd2807SJeff Garzik ata_port_printk(ap, KERN_ERR, "illegal qc_active transition " 5319c6fd2807SJeff Garzik "(%08x->%08x)\n", ap->qc_active, qc_active); 5320c6fd2807SJeff Garzik return -EINVAL; 5321c6fd2807SJeff Garzik } 5322c6fd2807SJeff Garzik 5323c6fd2807SJeff Garzik for (i = 0; i < ATA_MAX_QUEUE; i++) { 5324c6fd2807SJeff Garzik struct ata_queued_cmd *qc; 5325c6fd2807SJeff Garzik 5326c6fd2807SJeff Garzik if (!(done_mask & (1 << i))) 5327c6fd2807SJeff Garzik continue; 5328c6fd2807SJeff Garzik 5329c6fd2807SJeff Garzik if ((qc = ata_qc_from_tag(ap, i))) { 5330c6fd2807SJeff Garzik if (finish_qc) 5331c6fd2807SJeff Garzik finish_qc(qc); 5332c6fd2807SJeff Garzik ata_qc_complete(qc); 5333c6fd2807SJeff Garzik nr_done++; 5334c6fd2807SJeff Garzik } 5335c6fd2807SJeff Garzik } 5336c6fd2807SJeff Garzik 5337c6fd2807SJeff Garzik return nr_done; 5338c6fd2807SJeff Garzik } 5339c6fd2807SJeff Garzik 5340c6fd2807SJeff Garzik static inline int ata_should_dma_map(struct ata_queued_cmd *qc) 5341c6fd2807SJeff Garzik { 5342c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 5343c6fd2807SJeff Garzik 5344c6fd2807SJeff Garzik switch (qc->tf.protocol) { 5345c6fd2807SJeff Garzik case ATA_PROT_NCQ: 5346c6fd2807SJeff Garzik case ATA_PROT_DMA: 5347c6fd2807SJeff Garzik case ATA_PROT_ATAPI_DMA: 5348c6fd2807SJeff Garzik return 1; 5349c6fd2807SJeff Garzik 5350c6fd2807SJeff Garzik case ATA_PROT_ATAPI: 5351c6fd2807SJeff Garzik case ATA_PROT_PIO: 5352c6fd2807SJeff Garzik if (ap->flags & ATA_FLAG_PIO_DMA) 5353c6fd2807SJeff Garzik return 1; 5354c6fd2807SJeff Garzik 5355c6fd2807SJeff Garzik /* fall through */ 5356c6fd2807SJeff Garzik 5357c6fd2807SJeff Garzik default: 5358c6fd2807SJeff Garzik return 0; 5359c6fd2807SJeff Garzik } 5360c6fd2807SJeff Garzik 5361c6fd2807SJeff Garzik /* never reached */ 5362c6fd2807SJeff Garzik } 5363c6fd2807SJeff Garzik 5364c6fd2807SJeff Garzik /** 5365c6fd2807SJeff Garzik * ata_qc_issue - issue taskfile to device 5366c6fd2807SJeff Garzik * @qc: command to issue to device 5367c6fd2807SJeff Garzik * 5368c6fd2807SJeff Garzik * Prepare an ATA command to submission to device. 5369c6fd2807SJeff Garzik * This includes mapping the data into a DMA-able 5370c6fd2807SJeff Garzik * area, filling in the S/G table, and finally 5371c6fd2807SJeff Garzik * writing the taskfile to hardware, starting the command. 5372c6fd2807SJeff Garzik * 5373c6fd2807SJeff Garzik * LOCKING: 5374cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 5375c6fd2807SJeff Garzik */ 5376c6fd2807SJeff Garzik void ata_qc_issue(struct ata_queued_cmd *qc) 5377c6fd2807SJeff Garzik { 5378c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 5379c6fd2807SJeff Garzik 5380c6fd2807SJeff Garzik /* Make sure only one non-NCQ command is outstanding. The 5381c6fd2807SJeff Garzik * check is skipped for old EH because it reuses active qc to 5382c6fd2807SJeff Garzik * request ATAPI sense. 5383c6fd2807SJeff Garzik */ 5384c6fd2807SJeff Garzik WARN_ON(ap->ops->error_handler && ata_tag_valid(ap->active_tag)); 5385c6fd2807SJeff Garzik 5386c6fd2807SJeff Garzik if (qc->tf.protocol == ATA_PROT_NCQ) { 5387c6fd2807SJeff Garzik WARN_ON(ap->sactive & (1 << qc->tag)); 5388c6fd2807SJeff Garzik ap->sactive |= 1 << qc->tag; 5389c6fd2807SJeff Garzik } else { 5390c6fd2807SJeff Garzik WARN_ON(ap->sactive); 5391c6fd2807SJeff Garzik ap->active_tag = qc->tag; 5392c6fd2807SJeff Garzik } 5393c6fd2807SJeff Garzik 5394c6fd2807SJeff Garzik qc->flags |= ATA_QCFLAG_ACTIVE; 5395c6fd2807SJeff Garzik ap->qc_active |= 1 << qc->tag; 5396c6fd2807SJeff Garzik 5397c6fd2807SJeff Garzik if (ata_should_dma_map(qc)) { 5398c6fd2807SJeff Garzik if (qc->flags & ATA_QCFLAG_SG) { 5399c6fd2807SJeff Garzik if (ata_sg_setup(qc)) 5400c6fd2807SJeff Garzik goto sg_err; 5401c6fd2807SJeff Garzik } else if (qc->flags & ATA_QCFLAG_SINGLE) { 5402c6fd2807SJeff Garzik if (ata_sg_setup_one(qc)) 5403c6fd2807SJeff Garzik goto sg_err; 5404c6fd2807SJeff Garzik } 5405c6fd2807SJeff Garzik } else { 5406c6fd2807SJeff Garzik qc->flags &= ~ATA_QCFLAG_DMAMAP; 5407c6fd2807SJeff Garzik } 5408c6fd2807SJeff Garzik 5409c6fd2807SJeff Garzik ap->ops->qc_prep(qc); 5410c6fd2807SJeff Garzik 5411c6fd2807SJeff Garzik qc->err_mask |= ap->ops->qc_issue(qc); 5412c6fd2807SJeff Garzik if (unlikely(qc->err_mask)) 5413c6fd2807SJeff Garzik goto err; 5414c6fd2807SJeff Garzik return; 5415c6fd2807SJeff Garzik 5416c6fd2807SJeff Garzik sg_err: 5417c6fd2807SJeff Garzik qc->flags &= ~ATA_QCFLAG_DMAMAP; 5418c6fd2807SJeff Garzik qc->err_mask |= AC_ERR_SYSTEM; 5419c6fd2807SJeff Garzik err: 5420c6fd2807SJeff Garzik ata_qc_complete(qc); 5421c6fd2807SJeff Garzik } 5422c6fd2807SJeff Garzik 5423c6fd2807SJeff Garzik /** 5424c6fd2807SJeff Garzik * ata_qc_issue_prot - issue taskfile to device in proto-dependent manner 5425c6fd2807SJeff Garzik * @qc: command to issue to device 5426c6fd2807SJeff Garzik * 5427c6fd2807SJeff Garzik * Using various libata functions and hooks, this function 5428c6fd2807SJeff Garzik * starts an ATA command. ATA commands are grouped into 5429c6fd2807SJeff Garzik * classes called "protocols", and issuing each type of protocol 5430c6fd2807SJeff Garzik * is slightly different. 5431c6fd2807SJeff Garzik * 5432c6fd2807SJeff Garzik * May be used as the qc_issue() entry in ata_port_operations. 5433c6fd2807SJeff Garzik * 5434c6fd2807SJeff Garzik * LOCKING: 5435cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 5436c6fd2807SJeff Garzik * 5437c6fd2807SJeff Garzik * RETURNS: 5438c6fd2807SJeff Garzik * Zero on success, AC_ERR_* mask on failure 5439c6fd2807SJeff Garzik */ 5440c6fd2807SJeff Garzik 5441c6fd2807SJeff Garzik unsigned int ata_qc_issue_prot(struct ata_queued_cmd *qc) 5442c6fd2807SJeff Garzik { 5443c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 5444c6fd2807SJeff Garzik 5445c6fd2807SJeff Garzik /* Use polling pio if the LLD doesn't handle 5446c6fd2807SJeff Garzik * interrupt driven pio and atapi CDB interrupt. 5447c6fd2807SJeff Garzik */ 5448c6fd2807SJeff Garzik if (ap->flags & ATA_FLAG_PIO_POLLING) { 5449c6fd2807SJeff Garzik switch (qc->tf.protocol) { 5450c6fd2807SJeff Garzik case ATA_PROT_PIO: 5451e3472cbeSAlbert Lee case ATA_PROT_NODATA: 5452c6fd2807SJeff Garzik case ATA_PROT_ATAPI: 5453c6fd2807SJeff Garzik case ATA_PROT_ATAPI_NODATA: 5454c6fd2807SJeff Garzik qc->tf.flags |= ATA_TFLAG_POLLING; 5455c6fd2807SJeff Garzik break; 5456c6fd2807SJeff Garzik case ATA_PROT_ATAPI_DMA: 5457c6fd2807SJeff Garzik if (qc->dev->flags & ATA_DFLAG_CDB_INTR) 5458c6fd2807SJeff Garzik /* see ata_dma_blacklisted() */ 5459c6fd2807SJeff Garzik BUG(); 5460c6fd2807SJeff Garzik break; 5461c6fd2807SJeff Garzik default: 5462c6fd2807SJeff Garzik break; 5463c6fd2807SJeff Garzik } 5464c6fd2807SJeff Garzik } 5465c6fd2807SJeff Garzik 5466c6fd2807SJeff Garzik /* select the device */ 5467c6fd2807SJeff Garzik ata_dev_select(ap, qc->dev->devno, 1, 0); 5468c6fd2807SJeff Garzik 5469c6fd2807SJeff Garzik /* start the command */ 5470c6fd2807SJeff Garzik switch (qc->tf.protocol) { 5471c6fd2807SJeff Garzik case ATA_PROT_NODATA: 5472c6fd2807SJeff Garzik if (qc->tf.flags & ATA_TFLAG_POLLING) 5473c6fd2807SJeff Garzik ata_qc_set_polling(qc); 5474c6fd2807SJeff Garzik 5475c6fd2807SJeff Garzik ata_tf_to_host(ap, &qc->tf); 5476c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_LAST; 5477c6fd2807SJeff Garzik 5478c6fd2807SJeff Garzik if (qc->tf.flags & ATA_TFLAG_POLLING) 5479c6fd2807SJeff Garzik ata_port_queue_task(ap, ata_pio_task, qc, 0); 5480c6fd2807SJeff Garzik 5481c6fd2807SJeff Garzik break; 5482c6fd2807SJeff Garzik 5483c6fd2807SJeff Garzik case ATA_PROT_DMA: 5484c6fd2807SJeff Garzik WARN_ON(qc->tf.flags & ATA_TFLAG_POLLING); 5485c6fd2807SJeff Garzik 5486c6fd2807SJeff Garzik ap->ops->tf_load(ap, &qc->tf); /* load tf registers */ 5487c6fd2807SJeff Garzik ap->ops->bmdma_setup(qc); /* set up bmdma */ 5488c6fd2807SJeff Garzik ap->ops->bmdma_start(qc); /* initiate bmdma */ 5489c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_LAST; 5490c6fd2807SJeff Garzik break; 5491c6fd2807SJeff Garzik 5492c6fd2807SJeff Garzik case ATA_PROT_PIO: 5493c6fd2807SJeff Garzik if (qc->tf.flags & ATA_TFLAG_POLLING) 5494c6fd2807SJeff Garzik ata_qc_set_polling(qc); 5495c6fd2807SJeff Garzik 5496c6fd2807SJeff Garzik ata_tf_to_host(ap, &qc->tf); 5497c6fd2807SJeff Garzik 5498c6fd2807SJeff Garzik if (qc->tf.flags & ATA_TFLAG_WRITE) { 5499c6fd2807SJeff Garzik /* PIO data out protocol */ 5500c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_FIRST; 5501c6fd2807SJeff Garzik ata_port_queue_task(ap, ata_pio_task, qc, 0); 5502c6fd2807SJeff Garzik 5503c6fd2807SJeff Garzik /* always send first data block using 5504c6fd2807SJeff Garzik * the ata_pio_task() codepath. 5505c6fd2807SJeff Garzik */ 5506c6fd2807SJeff Garzik } else { 5507c6fd2807SJeff Garzik /* PIO data in protocol */ 5508c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST; 5509c6fd2807SJeff Garzik 5510c6fd2807SJeff Garzik if (qc->tf.flags & ATA_TFLAG_POLLING) 5511c6fd2807SJeff Garzik ata_port_queue_task(ap, ata_pio_task, qc, 0); 5512c6fd2807SJeff Garzik 5513c6fd2807SJeff Garzik /* if polling, ata_pio_task() handles the rest. 5514c6fd2807SJeff Garzik * otherwise, interrupt handler takes over from here. 5515c6fd2807SJeff Garzik */ 5516c6fd2807SJeff Garzik } 5517c6fd2807SJeff Garzik 5518c6fd2807SJeff Garzik break; 5519c6fd2807SJeff Garzik 5520c6fd2807SJeff Garzik case ATA_PROT_ATAPI: 5521c6fd2807SJeff Garzik case ATA_PROT_ATAPI_NODATA: 5522c6fd2807SJeff Garzik if (qc->tf.flags & ATA_TFLAG_POLLING) 5523c6fd2807SJeff Garzik ata_qc_set_polling(qc); 5524c6fd2807SJeff Garzik 5525c6fd2807SJeff Garzik ata_tf_to_host(ap, &qc->tf); 5526c6fd2807SJeff Garzik 5527c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_FIRST; 5528c6fd2807SJeff Garzik 5529c6fd2807SJeff Garzik /* send cdb by polling if no cdb interrupt */ 5530c6fd2807SJeff Garzik if ((!(qc->dev->flags & ATA_DFLAG_CDB_INTR)) || 5531c6fd2807SJeff Garzik (qc->tf.flags & ATA_TFLAG_POLLING)) 5532c6fd2807SJeff Garzik ata_port_queue_task(ap, ata_pio_task, qc, 0); 5533c6fd2807SJeff Garzik break; 5534c6fd2807SJeff Garzik 5535c6fd2807SJeff Garzik case ATA_PROT_ATAPI_DMA: 5536c6fd2807SJeff Garzik WARN_ON(qc->tf.flags & ATA_TFLAG_POLLING); 5537c6fd2807SJeff Garzik 5538c6fd2807SJeff Garzik ap->ops->tf_load(ap, &qc->tf); /* load tf registers */ 5539c6fd2807SJeff Garzik ap->ops->bmdma_setup(qc); /* set up bmdma */ 5540c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_FIRST; 5541c6fd2807SJeff Garzik 5542c6fd2807SJeff Garzik /* send cdb by polling if no cdb interrupt */ 5543c6fd2807SJeff Garzik if (!(qc->dev->flags & ATA_DFLAG_CDB_INTR)) 5544c6fd2807SJeff Garzik ata_port_queue_task(ap, ata_pio_task, qc, 0); 5545c6fd2807SJeff Garzik break; 5546c6fd2807SJeff Garzik 5547c6fd2807SJeff Garzik default: 5548c6fd2807SJeff Garzik WARN_ON(1); 5549c6fd2807SJeff Garzik return AC_ERR_SYSTEM; 5550c6fd2807SJeff Garzik } 5551c6fd2807SJeff Garzik 5552c6fd2807SJeff Garzik return 0; 5553c6fd2807SJeff Garzik } 5554c6fd2807SJeff Garzik 5555c6fd2807SJeff Garzik /** 5556c6fd2807SJeff Garzik * ata_host_intr - Handle host interrupt for given (port, task) 5557c6fd2807SJeff Garzik * @ap: Port on which interrupt arrived (possibly...) 5558c6fd2807SJeff Garzik * @qc: Taskfile currently active in engine 5559c6fd2807SJeff Garzik * 5560c6fd2807SJeff Garzik * Handle host interrupt for given queued command. Currently, 5561c6fd2807SJeff Garzik * only DMA interrupts are handled. All other commands are 5562c6fd2807SJeff Garzik * handled via polling with interrupts disabled (nIEN bit). 5563c6fd2807SJeff Garzik * 5564c6fd2807SJeff Garzik * LOCKING: 5565cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 5566c6fd2807SJeff Garzik * 5567c6fd2807SJeff Garzik * RETURNS: 5568c6fd2807SJeff Garzik * One if interrupt was handled, zero if not (shared irq). 5569c6fd2807SJeff Garzik */ 5570c6fd2807SJeff Garzik 5571c6fd2807SJeff Garzik inline unsigned int ata_host_intr (struct ata_port *ap, 5572c6fd2807SJeff Garzik struct ata_queued_cmd *qc) 5573c6fd2807SJeff Garzik { 5574ea54763fSTejun Heo struct ata_eh_info *ehi = &ap->eh_info; 5575c6fd2807SJeff Garzik u8 status, host_stat = 0; 5576c6fd2807SJeff Garzik 5577c6fd2807SJeff Garzik VPRINTK("ata%u: protocol %d task_state %d\n", 557844877b4eSTejun Heo ap->print_id, qc->tf.protocol, ap->hsm_task_state); 5579c6fd2807SJeff Garzik 5580c6fd2807SJeff Garzik /* Check whether we are expecting interrupt in this state */ 5581c6fd2807SJeff Garzik switch (ap->hsm_task_state) { 5582c6fd2807SJeff Garzik case HSM_ST_FIRST: 5583c6fd2807SJeff Garzik /* Some pre-ATAPI-4 devices assert INTRQ 5584c6fd2807SJeff Garzik * at this state when ready to receive CDB. 5585c6fd2807SJeff Garzik */ 5586c6fd2807SJeff Garzik 5587c6fd2807SJeff Garzik /* Check the ATA_DFLAG_CDB_INTR flag is enough here. 5588c6fd2807SJeff Garzik * The flag was turned on only for atapi devices. 5589c6fd2807SJeff Garzik * No need to check is_atapi_taskfile(&qc->tf) again. 5590c6fd2807SJeff Garzik */ 5591c6fd2807SJeff Garzik if (!(qc->dev->flags & ATA_DFLAG_CDB_INTR)) 5592c6fd2807SJeff Garzik goto idle_irq; 5593c6fd2807SJeff Garzik break; 5594c6fd2807SJeff Garzik case HSM_ST_LAST: 5595c6fd2807SJeff Garzik if (qc->tf.protocol == ATA_PROT_DMA || 5596c6fd2807SJeff Garzik qc->tf.protocol == ATA_PROT_ATAPI_DMA) { 5597c6fd2807SJeff Garzik /* check status of DMA engine */ 5598c6fd2807SJeff Garzik host_stat = ap->ops->bmdma_status(ap); 559944877b4eSTejun Heo VPRINTK("ata%u: host_stat 0x%X\n", 560044877b4eSTejun Heo ap->print_id, host_stat); 5601c6fd2807SJeff Garzik 5602c6fd2807SJeff Garzik /* if it's not our irq... */ 5603c6fd2807SJeff Garzik if (!(host_stat & ATA_DMA_INTR)) 5604c6fd2807SJeff Garzik goto idle_irq; 5605c6fd2807SJeff Garzik 5606c6fd2807SJeff Garzik /* before we do anything else, clear DMA-Start bit */ 5607c6fd2807SJeff Garzik ap->ops->bmdma_stop(qc); 5608c6fd2807SJeff Garzik 5609c6fd2807SJeff Garzik if (unlikely(host_stat & ATA_DMA_ERR)) { 5610c6fd2807SJeff Garzik /* error when transfering data to/from memory */ 5611c6fd2807SJeff Garzik qc->err_mask |= AC_ERR_HOST_BUS; 5612c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_ERR; 5613c6fd2807SJeff Garzik } 5614c6fd2807SJeff Garzik } 5615c6fd2807SJeff Garzik break; 5616c6fd2807SJeff Garzik case HSM_ST: 5617c6fd2807SJeff Garzik break; 5618c6fd2807SJeff Garzik default: 5619c6fd2807SJeff Garzik goto idle_irq; 5620c6fd2807SJeff Garzik } 5621c6fd2807SJeff Garzik 5622c6fd2807SJeff Garzik /* check altstatus */ 5623c6fd2807SJeff Garzik status = ata_altstatus(ap); 5624c6fd2807SJeff Garzik if (status & ATA_BUSY) 5625c6fd2807SJeff Garzik goto idle_irq; 5626c6fd2807SJeff Garzik 5627c6fd2807SJeff Garzik /* check main status, clearing INTRQ */ 5628c6fd2807SJeff Garzik status = ata_chk_status(ap); 5629c6fd2807SJeff Garzik if (unlikely(status & ATA_BUSY)) 5630c6fd2807SJeff Garzik goto idle_irq; 5631c6fd2807SJeff Garzik 5632c6fd2807SJeff Garzik /* ack bmdma irq events */ 5633c6fd2807SJeff Garzik ap->ops->irq_clear(ap); 5634c6fd2807SJeff Garzik 5635c6fd2807SJeff Garzik ata_hsm_move(ap, qc, status, 0); 5636ea54763fSTejun Heo 5637ea54763fSTejun Heo if (unlikely(qc->err_mask) && (qc->tf.protocol == ATA_PROT_DMA || 5638ea54763fSTejun Heo qc->tf.protocol == ATA_PROT_ATAPI_DMA)) 5639ea54763fSTejun Heo ata_ehi_push_desc(ehi, "BMDMA stat 0x%x", host_stat); 5640ea54763fSTejun Heo 5641c6fd2807SJeff Garzik return 1; /* irq handled */ 5642c6fd2807SJeff Garzik 5643c6fd2807SJeff Garzik idle_irq: 5644c6fd2807SJeff Garzik ap->stats.idle_irq++; 5645c6fd2807SJeff Garzik 5646c6fd2807SJeff Garzik #ifdef ATA_IRQ_TRAP 5647c6fd2807SJeff Garzik if ((ap->stats.idle_irq % 1000) == 0) { 564883625006SAkira Iguchi ap->ops->irq_ack(ap, 0); /* debug trap */ 5649c6fd2807SJeff Garzik ata_port_printk(ap, KERN_WARNING, "irq trap\n"); 5650c6fd2807SJeff Garzik return 1; 5651c6fd2807SJeff Garzik } 5652c6fd2807SJeff Garzik #endif 5653c6fd2807SJeff Garzik return 0; /* irq not handled */ 5654c6fd2807SJeff Garzik } 5655c6fd2807SJeff Garzik 5656c6fd2807SJeff Garzik /** 5657c6fd2807SJeff Garzik * ata_interrupt - Default ATA host interrupt handler 5658c6fd2807SJeff Garzik * @irq: irq line (unused) 5659cca3974eSJeff Garzik * @dev_instance: pointer to our ata_host information structure 5660c6fd2807SJeff Garzik * 5661c6fd2807SJeff Garzik * Default interrupt handler for PCI IDE devices. Calls 5662c6fd2807SJeff Garzik * ata_host_intr() for each port that is not disabled. 5663c6fd2807SJeff Garzik * 5664c6fd2807SJeff Garzik * LOCKING: 5665cca3974eSJeff Garzik * Obtains host lock during operation. 5666c6fd2807SJeff Garzik * 5667c6fd2807SJeff Garzik * RETURNS: 5668c6fd2807SJeff Garzik * IRQ_NONE or IRQ_HANDLED. 5669c6fd2807SJeff Garzik */ 5670c6fd2807SJeff Garzik 56717d12e780SDavid Howells irqreturn_t ata_interrupt (int irq, void *dev_instance) 5672c6fd2807SJeff Garzik { 5673cca3974eSJeff Garzik struct ata_host *host = dev_instance; 5674c6fd2807SJeff Garzik unsigned int i; 5675c6fd2807SJeff Garzik unsigned int handled = 0; 5676c6fd2807SJeff Garzik unsigned long flags; 5677c6fd2807SJeff Garzik 5678c6fd2807SJeff Garzik /* TODO: make _irqsave conditional on x86 PCI IDE legacy mode */ 5679cca3974eSJeff Garzik spin_lock_irqsave(&host->lock, flags); 5680c6fd2807SJeff Garzik 5681cca3974eSJeff Garzik for (i = 0; i < host->n_ports; i++) { 5682c6fd2807SJeff Garzik struct ata_port *ap; 5683c6fd2807SJeff Garzik 5684cca3974eSJeff Garzik ap = host->ports[i]; 5685c6fd2807SJeff Garzik if (ap && 5686c6fd2807SJeff Garzik !(ap->flags & ATA_FLAG_DISABLED)) { 5687c6fd2807SJeff Garzik struct ata_queued_cmd *qc; 5688c6fd2807SJeff Garzik 5689c6fd2807SJeff Garzik qc = ata_qc_from_tag(ap, ap->active_tag); 5690c6fd2807SJeff Garzik if (qc && (!(qc->tf.flags & ATA_TFLAG_POLLING)) && 5691c6fd2807SJeff Garzik (qc->flags & ATA_QCFLAG_ACTIVE)) 5692c6fd2807SJeff Garzik handled |= ata_host_intr(ap, qc); 5693c6fd2807SJeff Garzik } 5694c6fd2807SJeff Garzik } 5695c6fd2807SJeff Garzik 5696cca3974eSJeff Garzik spin_unlock_irqrestore(&host->lock, flags); 5697c6fd2807SJeff Garzik 5698c6fd2807SJeff Garzik return IRQ_RETVAL(handled); 5699c6fd2807SJeff Garzik } 5700c6fd2807SJeff Garzik 5701c6fd2807SJeff Garzik /** 5702c6fd2807SJeff Garzik * sata_scr_valid - test whether SCRs are accessible 5703c6fd2807SJeff Garzik * @ap: ATA port to test SCR accessibility for 5704c6fd2807SJeff Garzik * 5705c6fd2807SJeff Garzik * Test whether SCRs are accessible for @ap. 5706c6fd2807SJeff Garzik * 5707c6fd2807SJeff Garzik * LOCKING: 5708c6fd2807SJeff Garzik * None. 5709c6fd2807SJeff Garzik * 5710c6fd2807SJeff Garzik * RETURNS: 5711c6fd2807SJeff Garzik * 1 if SCRs are accessible, 0 otherwise. 5712c6fd2807SJeff Garzik */ 5713c6fd2807SJeff Garzik int sata_scr_valid(struct ata_port *ap) 5714c6fd2807SJeff Garzik { 5715a16abc0bSTejun Heo return (ap->flags & ATA_FLAG_SATA) && ap->ops->scr_read; 5716c6fd2807SJeff Garzik } 5717c6fd2807SJeff Garzik 5718c6fd2807SJeff Garzik /** 5719c6fd2807SJeff Garzik * sata_scr_read - read SCR register of the specified port 5720c6fd2807SJeff Garzik * @ap: ATA port to read SCR for 5721c6fd2807SJeff Garzik * @reg: SCR to read 5722c6fd2807SJeff Garzik * @val: Place to store read value 5723c6fd2807SJeff Garzik * 5724c6fd2807SJeff Garzik * Read SCR register @reg of @ap into *@val. This function is 5725c6fd2807SJeff Garzik * guaranteed to succeed if the cable type of the port is SATA 5726c6fd2807SJeff Garzik * and the port implements ->scr_read. 5727c6fd2807SJeff Garzik * 5728c6fd2807SJeff Garzik * LOCKING: 5729c6fd2807SJeff Garzik * None. 5730c6fd2807SJeff Garzik * 5731c6fd2807SJeff Garzik * RETURNS: 5732c6fd2807SJeff Garzik * 0 on success, negative errno on failure. 5733c6fd2807SJeff Garzik */ 5734c6fd2807SJeff Garzik int sata_scr_read(struct ata_port *ap, int reg, u32 *val) 5735c6fd2807SJeff Garzik { 5736c6fd2807SJeff Garzik if (sata_scr_valid(ap)) { 5737c6fd2807SJeff Garzik *val = ap->ops->scr_read(ap, reg); 5738c6fd2807SJeff Garzik return 0; 5739c6fd2807SJeff Garzik } 5740c6fd2807SJeff Garzik return -EOPNOTSUPP; 5741c6fd2807SJeff Garzik } 5742c6fd2807SJeff Garzik 5743c6fd2807SJeff Garzik /** 5744c6fd2807SJeff Garzik * sata_scr_write - write SCR register of the specified port 5745c6fd2807SJeff Garzik * @ap: ATA port to write SCR for 5746c6fd2807SJeff Garzik * @reg: SCR to write 5747c6fd2807SJeff Garzik * @val: value to write 5748c6fd2807SJeff Garzik * 5749c6fd2807SJeff Garzik * Write @val to SCR register @reg of @ap. This function is 5750c6fd2807SJeff Garzik * guaranteed to succeed if the cable type of the port is SATA 5751c6fd2807SJeff Garzik * and the port implements ->scr_read. 5752c6fd2807SJeff Garzik * 5753c6fd2807SJeff Garzik * LOCKING: 5754c6fd2807SJeff Garzik * None. 5755c6fd2807SJeff Garzik * 5756c6fd2807SJeff Garzik * RETURNS: 5757c6fd2807SJeff Garzik * 0 on success, negative errno on failure. 5758c6fd2807SJeff Garzik */ 5759c6fd2807SJeff Garzik int sata_scr_write(struct ata_port *ap, int reg, u32 val) 5760c6fd2807SJeff Garzik { 5761c6fd2807SJeff Garzik if (sata_scr_valid(ap)) { 5762c6fd2807SJeff Garzik ap->ops->scr_write(ap, reg, val); 5763c6fd2807SJeff Garzik return 0; 5764c6fd2807SJeff Garzik } 5765c6fd2807SJeff Garzik return -EOPNOTSUPP; 5766c6fd2807SJeff Garzik } 5767c6fd2807SJeff Garzik 5768c6fd2807SJeff Garzik /** 5769c6fd2807SJeff Garzik * sata_scr_write_flush - write SCR register of the specified port and flush 5770c6fd2807SJeff Garzik * @ap: ATA port to write SCR for 5771c6fd2807SJeff Garzik * @reg: SCR to write 5772c6fd2807SJeff Garzik * @val: value to write 5773c6fd2807SJeff Garzik * 5774c6fd2807SJeff Garzik * This function is identical to sata_scr_write() except that this 5775c6fd2807SJeff Garzik * function performs flush after writing to the register. 5776c6fd2807SJeff Garzik * 5777c6fd2807SJeff Garzik * LOCKING: 5778c6fd2807SJeff Garzik * None. 5779c6fd2807SJeff Garzik * 5780c6fd2807SJeff Garzik * RETURNS: 5781c6fd2807SJeff Garzik * 0 on success, negative errno on failure. 5782c6fd2807SJeff Garzik */ 5783c6fd2807SJeff Garzik int sata_scr_write_flush(struct ata_port *ap, int reg, u32 val) 5784c6fd2807SJeff Garzik { 5785c6fd2807SJeff Garzik if (sata_scr_valid(ap)) { 5786c6fd2807SJeff Garzik ap->ops->scr_write(ap, reg, val); 5787c6fd2807SJeff Garzik ap->ops->scr_read(ap, reg); 5788c6fd2807SJeff Garzik return 0; 5789c6fd2807SJeff Garzik } 5790c6fd2807SJeff Garzik return -EOPNOTSUPP; 5791c6fd2807SJeff Garzik } 5792c6fd2807SJeff Garzik 5793c6fd2807SJeff Garzik /** 5794c6fd2807SJeff Garzik * ata_port_online - test whether the given port is online 5795c6fd2807SJeff Garzik * @ap: ATA port to test 5796c6fd2807SJeff Garzik * 5797c6fd2807SJeff Garzik * Test whether @ap is online. Note that this function returns 0 5798c6fd2807SJeff Garzik * if online status of @ap cannot be obtained, so 5799c6fd2807SJeff Garzik * ata_port_online(ap) != !ata_port_offline(ap). 5800c6fd2807SJeff Garzik * 5801c6fd2807SJeff Garzik * LOCKING: 5802c6fd2807SJeff Garzik * None. 5803c6fd2807SJeff Garzik * 5804c6fd2807SJeff Garzik * RETURNS: 5805c6fd2807SJeff Garzik * 1 if the port online status is available and online. 5806c6fd2807SJeff Garzik */ 5807c6fd2807SJeff Garzik int ata_port_online(struct ata_port *ap) 5808c6fd2807SJeff Garzik { 5809c6fd2807SJeff Garzik u32 sstatus; 5810c6fd2807SJeff Garzik 5811c6fd2807SJeff Garzik if (!sata_scr_read(ap, SCR_STATUS, &sstatus) && (sstatus & 0xf) == 0x3) 5812c6fd2807SJeff Garzik return 1; 5813c6fd2807SJeff Garzik return 0; 5814c6fd2807SJeff Garzik } 5815c6fd2807SJeff Garzik 5816c6fd2807SJeff Garzik /** 5817c6fd2807SJeff Garzik * ata_port_offline - test whether the given port is offline 5818c6fd2807SJeff Garzik * @ap: ATA port to test 5819c6fd2807SJeff Garzik * 5820c6fd2807SJeff Garzik * Test whether @ap is offline. Note that this function returns 5821c6fd2807SJeff Garzik * 0 if offline status of @ap cannot be obtained, so 5822c6fd2807SJeff Garzik * ata_port_online(ap) != !ata_port_offline(ap). 5823c6fd2807SJeff Garzik * 5824c6fd2807SJeff Garzik * LOCKING: 5825c6fd2807SJeff Garzik * None. 5826c6fd2807SJeff Garzik * 5827c6fd2807SJeff Garzik * RETURNS: 5828c6fd2807SJeff Garzik * 1 if the port offline status is available and offline. 5829c6fd2807SJeff Garzik */ 5830c6fd2807SJeff Garzik int ata_port_offline(struct ata_port *ap) 5831c6fd2807SJeff Garzik { 5832c6fd2807SJeff Garzik u32 sstatus; 5833c6fd2807SJeff Garzik 5834c6fd2807SJeff Garzik if (!sata_scr_read(ap, SCR_STATUS, &sstatus) && (sstatus & 0xf) != 0x3) 5835c6fd2807SJeff Garzik return 1; 5836c6fd2807SJeff Garzik return 0; 5837c6fd2807SJeff Garzik } 5838c6fd2807SJeff Garzik 5839c6fd2807SJeff Garzik int ata_flush_cache(struct ata_device *dev) 5840c6fd2807SJeff Garzik { 5841c6fd2807SJeff Garzik unsigned int err_mask; 5842c6fd2807SJeff Garzik u8 cmd; 5843c6fd2807SJeff Garzik 5844c6fd2807SJeff Garzik if (!ata_try_flush_cache(dev)) 5845c6fd2807SJeff Garzik return 0; 5846c6fd2807SJeff Garzik 58476fc49adbSTejun Heo if (dev->flags & ATA_DFLAG_FLUSH_EXT) 5848c6fd2807SJeff Garzik cmd = ATA_CMD_FLUSH_EXT; 5849c6fd2807SJeff Garzik else 5850c6fd2807SJeff Garzik cmd = ATA_CMD_FLUSH; 5851c6fd2807SJeff Garzik 5852c6fd2807SJeff Garzik err_mask = ata_do_simple_cmd(dev, cmd); 5853c6fd2807SJeff Garzik if (err_mask) { 5854c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_ERR, "failed to flush cache\n"); 5855c6fd2807SJeff Garzik return -EIO; 5856c6fd2807SJeff Garzik } 5857c6fd2807SJeff Garzik 5858c6fd2807SJeff Garzik return 0; 5859c6fd2807SJeff Garzik } 5860c6fd2807SJeff Garzik 58616ffa01d8STejun Heo #ifdef CONFIG_PM 5862cca3974eSJeff Garzik static int ata_host_request_pm(struct ata_host *host, pm_message_t mesg, 5863cca3974eSJeff Garzik unsigned int action, unsigned int ehi_flags, 5864cca3974eSJeff Garzik int wait) 5865c6fd2807SJeff Garzik { 5866c6fd2807SJeff Garzik unsigned long flags; 5867c6fd2807SJeff Garzik int i, rc; 5868c6fd2807SJeff Garzik 5869cca3974eSJeff Garzik for (i = 0; i < host->n_ports; i++) { 5870cca3974eSJeff Garzik struct ata_port *ap = host->ports[i]; 5871c6fd2807SJeff Garzik 5872c6fd2807SJeff Garzik /* Previous resume operation might still be in 5873c6fd2807SJeff Garzik * progress. Wait for PM_PENDING to clear. 5874c6fd2807SJeff Garzik */ 5875c6fd2807SJeff Garzik if (ap->pflags & ATA_PFLAG_PM_PENDING) { 5876c6fd2807SJeff Garzik ata_port_wait_eh(ap); 5877c6fd2807SJeff Garzik WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING); 5878c6fd2807SJeff Garzik } 5879c6fd2807SJeff Garzik 5880c6fd2807SJeff Garzik /* request PM ops to EH */ 5881c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 5882c6fd2807SJeff Garzik 5883c6fd2807SJeff Garzik ap->pm_mesg = mesg; 5884c6fd2807SJeff Garzik if (wait) { 5885c6fd2807SJeff Garzik rc = 0; 5886c6fd2807SJeff Garzik ap->pm_result = &rc; 5887c6fd2807SJeff Garzik } 5888c6fd2807SJeff Garzik 5889c6fd2807SJeff Garzik ap->pflags |= ATA_PFLAG_PM_PENDING; 5890c6fd2807SJeff Garzik ap->eh_info.action |= action; 5891c6fd2807SJeff Garzik ap->eh_info.flags |= ehi_flags; 5892c6fd2807SJeff Garzik 5893c6fd2807SJeff Garzik ata_port_schedule_eh(ap); 5894c6fd2807SJeff Garzik 5895c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 5896c6fd2807SJeff Garzik 5897c6fd2807SJeff Garzik /* wait and check result */ 5898c6fd2807SJeff Garzik if (wait) { 5899c6fd2807SJeff Garzik ata_port_wait_eh(ap); 5900c6fd2807SJeff Garzik WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING); 5901c6fd2807SJeff Garzik if (rc) 5902c6fd2807SJeff Garzik return rc; 5903c6fd2807SJeff Garzik } 5904c6fd2807SJeff Garzik } 5905c6fd2807SJeff Garzik 5906c6fd2807SJeff Garzik return 0; 5907c6fd2807SJeff Garzik } 5908c6fd2807SJeff Garzik 5909c6fd2807SJeff Garzik /** 5910cca3974eSJeff Garzik * ata_host_suspend - suspend host 5911cca3974eSJeff Garzik * @host: host to suspend 5912c6fd2807SJeff Garzik * @mesg: PM message 5913c6fd2807SJeff Garzik * 5914cca3974eSJeff Garzik * Suspend @host. Actual operation is performed by EH. This 5915c6fd2807SJeff Garzik * function requests EH to perform PM operations and waits for EH 5916c6fd2807SJeff Garzik * to finish. 5917c6fd2807SJeff Garzik * 5918c6fd2807SJeff Garzik * LOCKING: 5919c6fd2807SJeff Garzik * Kernel thread context (may sleep). 5920c6fd2807SJeff Garzik * 5921c6fd2807SJeff Garzik * RETURNS: 5922c6fd2807SJeff Garzik * 0 on success, -errno on failure. 5923c6fd2807SJeff Garzik */ 5924cca3974eSJeff Garzik int ata_host_suspend(struct ata_host *host, pm_message_t mesg) 5925c6fd2807SJeff Garzik { 59269666f400STejun Heo int rc; 5927c6fd2807SJeff Garzik 5928cca3974eSJeff Garzik rc = ata_host_request_pm(host, mesg, 0, ATA_EHI_QUIET, 1); 59299666f400STejun Heo if (rc == 0) 5930cca3974eSJeff Garzik host->dev->power.power_state = mesg; 5931c6fd2807SJeff Garzik return rc; 5932c6fd2807SJeff Garzik } 5933c6fd2807SJeff Garzik 5934c6fd2807SJeff Garzik /** 5935cca3974eSJeff Garzik * ata_host_resume - resume host 5936cca3974eSJeff Garzik * @host: host to resume 5937c6fd2807SJeff Garzik * 5938cca3974eSJeff Garzik * Resume @host. Actual operation is performed by EH. This 5939c6fd2807SJeff Garzik * function requests EH to perform PM operations and returns. 5940c6fd2807SJeff Garzik * Note that all resume operations are performed parallely. 5941c6fd2807SJeff Garzik * 5942c6fd2807SJeff Garzik * LOCKING: 5943c6fd2807SJeff Garzik * Kernel thread context (may sleep). 5944c6fd2807SJeff Garzik */ 5945cca3974eSJeff Garzik void ata_host_resume(struct ata_host *host) 5946c6fd2807SJeff Garzik { 5947cca3974eSJeff Garzik ata_host_request_pm(host, PMSG_ON, ATA_EH_SOFTRESET, 5948c6fd2807SJeff Garzik ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET, 0); 5949cca3974eSJeff Garzik host->dev->power.power_state = PMSG_ON; 5950c6fd2807SJeff Garzik } 59516ffa01d8STejun Heo #endif 5952c6fd2807SJeff Garzik 5953c6fd2807SJeff Garzik /** 5954c6fd2807SJeff Garzik * ata_port_start - Set port up for dma. 5955c6fd2807SJeff Garzik * @ap: Port to initialize 5956c6fd2807SJeff Garzik * 5957c6fd2807SJeff Garzik * Called just after data structures for each port are 5958c6fd2807SJeff Garzik * initialized. Allocates space for PRD table. 5959c6fd2807SJeff Garzik * 5960c6fd2807SJeff Garzik * May be used as the port_start() entry in ata_port_operations. 5961c6fd2807SJeff Garzik * 5962c6fd2807SJeff Garzik * LOCKING: 5963c6fd2807SJeff Garzik * Inherited from caller. 5964c6fd2807SJeff Garzik */ 5965c6fd2807SJeff Garzik int ata_port_start(struct ata_port *ap) 5966c6fd2807SJeff Garzik { 5967c6fd2807SJeff Garzik struct device *dev = ap->dev; 5968c6fd2807SJeff Garzik int rc; 5969c6fd2807SJeff Garzik 5970f0d36efdSTejun Heo ap->prd = dmam_alloc_coherent(dev, ATA_PRD_TBL_SZ, &ap->prd_dma, 5971f0d36efdSTejun Heo GFP_KERNEL); 5972c6fd2807SJeff Garzik if (!ap->prd) 5973c6fd2807SJeff Garzik return -ENOMEM; 5974c6fd2807SJeff Garzik 5975c6fd2807SJeff Garzik rc = ata_pad_alloc(ap, dev); 5976f0d36efdSTejun Heo if (rc) 5977c6fd2807SJeff Garzik return rc; 5978c6fd2807SJeff Garzik 5979f0d36efdSTejun Heo DPRINTK("prd alloc, virt %p, dma %llx\n", ap->prd, 5980f0d36efdSTejun Heo (unsigned long long)ap->prd_dma); 5981c6fd2807SJeff Garzik return 0; 5982c6fd2807SJeff Garzik } 5983c6fd2807SJeff Garzik 5984c6fd2807SJeff Garzik /** 5985c6fd2807SJeff Garzik * ata_dev_init - Initialize an ata_device structure 5986c6fd2807SJeff Garzik * @dev: Device structure to initialize 5987c6fd2807SJeff Garzik * 5988c6fd2807SJeff Garzik * Initialize @dev in preparation for probing. 5989c6fd2807SJeff Garzik * 5990c6fd2807SJeff Garzik * LOCKING: 5991c6fd2807SJeff Garzik * Inherited from caller. 5992c6fd2807SJeff Garzik */ 5993c6fd2807SJeff Garzik void ata_dev_init(struct ata_device *dev) 5994c6fd2807SJeff Garzik { 5995c6fd2807SJeff Garzik struct ata_port *ap = dev->ap; 5996c6fd2807SJeff Garzik unsigned long flags; 5997c6fd2807SJeff Garzik 5998c6fd2807SJeff Garzik /* SATA spd limit is bound to the first device */ 5999c6fd2807SJeff Garzik ap->sata_spd_limit = ap->hw_sata_spd_limit; 6000c6fd2807SJeff Garzik 6001c6fd2807SJeff Garzik /* High bits of dev->flags are used to record warm plug 6002c6fd2807SJeff Garzik * requests which occur asynchronously. Synchronize using 6003cca3974eSJeff Garzik * host lock. 6004c6fd2807SJeff Garzik */ 6005c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 6006c6fd2807SJeff Garzik dev->flags &= ~ATA_DFLAG_INIT_MASK; 6007c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 6008c6fd2807SJeff Garzik 6009c6fd2807SJeff Garzik memset((void *)dev + ATA_DEVICE_CLEAR_OFFSET, 0, 6010c6fd2807SJeff Garzik sizeof(*dev) - ATA_DEVICE_CLEAR_OFFSET); 6011c6fd2807SJeff Garzik dev->pio_mask = UINT_MAX; 6012c6fd2807SJeff Garzik dev->mwdma_mask = UINT_MAX; 6013c6fd2807SJeff Garzik dev->udma_mask = UINT_MAX; 6014c6fd2807SJeff Garzik } 6015c6fd2807SJeff Garzik 6016c6fd2807SJeff Garzik /** 6017f3187195STejun Heo * ata_port_alloc - allocate and initialize basic ATA port resources 6018f3187195STejun Heo * @host: ATA host this allocated port belongs to 6019c6fd2807SJeff Garzik * 6020f3187195STejun Heo * Allocate and initialize basic ATA port resources. 6021f3187195STejun Heo * 6022f3187195STejun Heo * RETURNS: 6023f3187195STejun Heo * Allocate ATA port on success, NULL on failure. 6024c6fd2807SJeff Garzik * 6025c6fd2807SJeff Garzik * LOCKING: 6026f3187195STejun Heo * Inherited from calling layer (may sleep). 6027c6fd2807SJeff Garzik */ 6028f3187195STejun Heo struct ata_port *ata_port_alloc(struct ata_host *host) 6029c6fd2807SJeff Garzik { 6030f3187195STejun Heo struct ata_port *ap; 6031c6fd2807SJeff Garzik unsigned int i; 6032c6fd2807SJeff Garzik 6033f3187195STejun Heo DPRINTK("ENTER\n"); 6034f3187195STejun Heo 6035f3187195STejun Heo ap = kzalloc(sizeof(*ap), GFP_KERNEL); 6036f3187195STejun Heo if (!ap) 6037f3187195STejun Heo return NULL; 6038f3187195STejun Heo 6039f4d6d004STejun Heo ap->pflags |= ATA_PFLAG_INITIALIZING; 6040cca3974eSJeff Garzik ap->lock = &host->lock; 6041c6fd2807SJeff Garzik ap->flags = ATA_FLAG_DISABLED; 6042f3187195STejun Heo ap->print_id = -1; 6043c6fd2807SJeff Garzik ap->ctl = ATA_DEVCTL_OBS; 6044cca3974eSJeff Garzik ap->host = host; 6045f3187195STejun Heo ap->dev = host->dev; 6046f3187195STejun Heo 6047c6fd2807SJeff Garzik ap->hw_sata_spd_limit = UINT_MAX; 6048c6fd2807SJeff Garzik ap->active_tag = ATA_TAG_POISON; 6049c6fd2807SJeff Garzik ap->last_ctl = 0xFF; 6050c6fd2807SJeff Garzik 6051c6fd2807SJeff Garzik #if defined(ATA_VERBOSE_DEBUG) 6052c6fd2807SJeff Garzik /* turn on all debugging levels */ 6053c6fd2807SJeff Garzik ap->msg_enable = 0x00FF; 6054c6fd2807SJeff Garzik #elif defined(ATA_DEBUG) 6055c6fd2807SJeff Garzik ap->msg_enable = ATA_MSG_DRV | ATA_MSG_INFO | ATA_MSG_CTL | ATA_MSG_WARN | ATA_MSG_ERR; 6056c6fd2807SJeff Garzik #else 6057c6fd2807SJeff Garzik ap->msg_enable = ATA_MSG_DRV | ATA_MSG_ERR | ATA_MSG_WARN; 6058c6fd2807SJeff Garzik #endif 6059c6fd2807SJeff Garzik 606065f27f38SDavid Howells INIT_DELAYED_WORK(&ap->port_task, NULL); 606165f27f38SDavid Howells INIT_DELAYED_WORK(&ap->hotplug_task, ata_scsi_hotplug); 606265f27f38SDavid Howells INIT_WORK(&ap->scsi_rescan_task, ata_scsi_dev_rescan); 6063c6fd2807SJeff Garzik INIT_LIST_HEAD(&ap->eh_done_q); 6064c6fd2807SJeff Garzik init_waitqueue_head(&ap->eh_wait_q); 6065c6fd2807SJeff Garzik 6066c6fd2807SJeff Garzik ap->cbl = ATA_CBL_NONE; 6067c6fd2807SJeff Garzik 6068c6fd2807SJeff Garzik for (i = 0; i < ATA_MAX_DEVICES; i++) { 6069c6fd2807SJeff Garzik struct ata_device *dev = &ap->device[i]; 6070c6fd2807SJeff Garzik dev->ap = ap; 6071c6fd2807SJeff Garzik dev->devno = i; 6072c6fd2807SJeff Garzik ata_dev_init(dev); 6073c6fd2807SJeff Garzik } 6074c6fd2807SJeff Garzik 6075c6fd2807SJeff Garzik #ifdef ATA_IRQ_TRAP 6076c6fd2807SJeff Garzik ap->stats.unhandled_irq = 1; 6077c6fd2807SJeff Garzik ap->stats.idle_irq = 1; 6078c6fd2807SJeff Garzik #endif 6079c6fd2807SJeff Garzik return ap; 6080c6fd2807SJeff Garzik } 6081c6fd2807SJeff Garzik 6082f0d36efdSTejun Heo static void ata_host_release(struct device *gendev, void *res) 6083f0d36efdSTejun Heo { 6084f0d36efdSTejun Heo struct ata_host *host = dev_get_drvdata(gendev); 6085f0d36efdSTejun Heo int i; 6086f0d36efdSTejun Heo 6087f0d36efdSTejun Heo for (i = 0; i < host->n_ports; i++) { 6088f0d36efdSTejun Heo struct ata_port *ap = host->ports[i]; 6089f0d36efdSTejun Heo 6090ecef7253STejun Heo if (!ap) 6091ecef7253STejun Heo continue; 6092ecef7253STejun Heo 6093ecef7253STejun Heo if ((host->flags & ATA_HOST_STARTED) && ap->ops->port_stop) 6094f0d36efdSTejun Heo ap->ops->port_stop(ap); 6095f0d36efdSTejun Heo } 6096f0d36efdSTejun Heo 6097ecef7253STejun Heo if ((host->flags & ATA_HOST_STARTED) && host->ops->host_stop) 6098f0d36efdSTejun Heo host->ops->host_stop(host); 60991aa56ccaSTejun Heo 61001aa506e4STejun Heo for (i = 0; i < host->n_ports; i++) { 61011aa506e4STejun Heo struct ata_port *ap = host->ports[i]; 61021aa506e4STejun Heo 61034911487aSTejun Heo if (!ap) 61044911487aSTejun Heo continue; 61054911487aSTejun Heo 61064911487aSTejun Heo if (ap->scsi_host) 61071aa506e4STejun Heo scsi_host_put(ap->scsi_host); 61081aa506e4STejun Heo 61094911487aSTejun Heo kfree(ap); 61101aa506e4STejun Heo host->ports[i] = NULL; 61111aa506e4STejun Heo } 61121aa506e4STejun Heo 61131aa56ccaSTejun Heo dev_set_drvdata(gendev, NULL); 6114f0d36efdSTejun Heo } 6115f0d36efdSTejun Heo 6116c6fd2807SJeff Garzik /** 6117f3187195STejun Heo * ata_host_alloc - allocate and init basic ATA host resources 6118f3187195STejun Heo * @dev: generic device this host is associated with 6119f3187195STejun Heo * @max_ports: maximum number of ATA ports associated with this host 6120f3187195STejun Heo * 6121f3187195STejun Heo * Allocate and initialize basic ATA host resources. LLD calls 6122f3187195STejun Heo * this function to allocate a host, initializes it fully and 6123f3187195STejun Heo * attaches it using ata_host_register(). 6124f3187195STejun Heo * 6125f3187195STejun Heo * @max_ports ports are allocated and host->n_ports is 6126f3187195STejun Heo * initialized to @max_ports. The caller is allowed to decrease 6127f3187195STejun Heo * host->n_ports before calling ata_host_register(). The unused 6128f3187195STejun Heo * ports will be automatically freed on registration. 6129f3187195STejun Heo * 6130f3187195STejun Heo * RETURNS: 6131f3187195STejun Heo * Allocate ATA host on success, NULL on failure. 6132f3187195STejun Heo * 6133f3187195STejun Heo * LOCKING: 6134f3187195STejun Heo * Inherited from calling layer (may sleep). 6135f3187195STejun Heo */ 6136f3187195STejun Heo struct ata_host *ata_host_alloc(struct device *dev, int max_ports) 6137f3187195STejun Heo { 6138f3187195STejun Heo struct ata_host *host; 6139f3187195STejun Heo size_t sz; 6140f3187195STejun Heo int i; 6141f3187195STejun Heo 6142f3187195STejun Heo DPRINTK("ENTER\n"); 6143f3187195STejun Heo 6144f3187195STejun Heo if (!devres_open_group(dev, NULL, GFP_KERNEL)) 6145f3187195STejun Heo return NULL; 6146f3187195STejun Heo 6147f3187195STejun Heo /* alloc a container for our list of ATA ports (buses) */ 6148f3187195STejun Heo sz = sizeof(struct ata_host) + (max_ports + 1) * sizeof(void *); 6149f3187195STejun Heo /* alloc a container for our list of ATA ports (buses) */ 6150f3187195STejun Heo host = devres_alloc(ata_host_release, sz, GFP_KERNEL); 6151f3187195STejun Heo if (!host) 6152f3187195STejun Heo goto err_out; 6153f3187195STejun Heo 6154f3187195STejun Heo devres_add(dev, host); 6155f3187195STejun Heo dev_set_drvdata(dev, host); 6156f3187195STejun Heo 6157f3187195STejun Heo spin_lock_init(&host->lock); 6158f3187195STejun Heo host->dev = dev; 6159f3187195STejun Heo host->n_ports = max_ports; 6160f3187195STejun Heo 6161f3187195STejun Heo /* allocate ports bound to this host */ 6162f3187195STejun Heo for (i = 0; i < max_ports; i++) { 6163f3187195STejun Heo struct ata_port *ap; 6164f3187195STejun Heo 6165f3187195STejun Heo ap = ata_port_alloc(host); 6166f3187195STejun Heo if (!ap) 6167f3187195STejun Heo goto err_out; 6168f3187195STejun Heo 6169f3187195STejun Heo ap->port_no = i; 6170f3187195STejun Heo host->ports[i] = ap; 6171f3187195STejun Heo } 6172f3187195STejun Heo 6173f3187195STejun Heo devres_remove_group(dev, NULL); 6174f3187195STejun Heo return host; 6175f3187195STejun Heo 6176f3187195STejun Heo err_out: 6177f3187195STejun Heo devres_release_group(dev, NULL); 6178f3187195STejun Heo return NULL; 6179f3187195STejun Heo } 6180f3187195STejun Heo 6181f3187195STejun Heo /** 6182f5cda257STejun Heo * ata_host_alloc_pinfo - alloc host and init with port_info array 6183f5cda257STejun Heo * @dev: generic device this host is associated with 6184f5cda257STejun Heo * @ppi: array of ATA port_info to initialize host with 6185f5cda257STejun Heo * @n_ports: number of ATA ports attached to this host 6186f5cda257STejun Heo * 6187f5cda257STejun Heo * Allocate ATA host and initialize with info from @ppi. If NULL 6188f5cda257STejun Heo * terminated, @ppi may contain fewer entries than @n_ports. The 6189f5cda257STejun Heo * last entry will be used for the remaining ports. 6190f5cda257STejun Heo * 6191f5cda257STejun Heo * RETURNS: 6192f5cda257STejun Heo * Allocate ATA host on success, NULL on failure. 6193f5cda257STejun Heo * 6194f5cda257STejun Heo * LOCKING: 6195f5cda257STejun Heo * Inherited from calling layer (may sleep). 6196f5cda257STejun Heo */ 6197f5cda257STejun Heo struct ata_host *ata_host_alloc_pinfo(struct device *dev, 6198f5cda257STejun Heo const struct ata_port_info * const * ppi, 6199f5cda257STejun Heo int n_ports) 6200f5cda257STejun Heo { 6201f5cda257STejun Heo const struct ata_port_info *pi; 6202f5cda257STejun Heo struct ata_host *host; 6203f5cda257STejun Heo int i, j; 6204f5cda257STejun Heo 6205f5cda257STejun Heo host = ata_host_alloc(dev, n_ports); 6206f5cda257STejun Heo if (!host) 6207f5cda257STejun Heo return NULL; 6208f5cda257STejun Heo 6209f5cda257STejun Heo for (i = 0, j = 0, pi = NULL; i < host->n_ports; i++) { 6210f5cda257STejun Heo struct ata_port *ap = host->ports[i]; 6211f5cda257STejun Heo 6212f5cda257STejun Heo if (ppi[j]) 6213f5cda257STejun Heo pi = ppi[j++]; 6214f5cda257STejun Heo 6215f5cda257STejun Heo ap->pio_mask = pi->pio_mask; 6216f5cda257STejun Heo ap->mwdma_mask = pi->mwdma_mask; 6217f5cda257STejun Heo ap->udma_mask = pi->udma_mask; 6218f5cda257STejun Heo ap->flags |= pi->flags; 6219f5cda257STejun Heo ap->ops = pi->port_ops; 6220f5cda257STejun Heo 6221f5cda257STejun Heo if (!host->ops && (pi->port_ops != &ata_dummy_port_ops)) 6222f5cda257STejun Heo host->ops = pi->port_ops; 6223f5cda257STejun Heo if (!host->private_data && pi->private_data) 6224f5cda257STejun Heo host->private_data = pi->private_data; 6225f5cda257STejun Heo } 6226f5cda257STejun Heo 6227f5cda257STejun Heo return host; 6228f5cda257STejun Heo } 6229f5cda257STejun Heo 6230f5cda257STejun Heo /** 6231ecef7253STejun Heo * ata_host_start - start and freeze ports of an ATA host 6232ecef7253STejun Heo * @host: ATA host to start ports for 6233ecef7253STejun Heo * 6234ecef7253STejun Heo * Start and then freeze ports of @host. Started status is 6235ecef7253STejun Heo * recorded in host->flags, so this function can be called 6236ecef7253STejun Heo * multiple times. Ports are guaranteed to get started only 6237f3187195STejun Heo * once. If host->ops isn't initialized yet, its set to the 6238f3187195STejun Heo * first non-dummy port ops. 6239ecef7253STejun Heo * 6240ecef7253STejun Heo * LOCKING: 6241ecef7253STejun Heo * Inherited from calling layer (may sleep). 6242ecef7253STejun Heo * 6243ecef7253STejun Heo * RETURNS: 6244ecef7253STejun Heo * 0 if all ports are started successfully, -errno otherwise. 6245ecef7253STejun Heo */ 6246ecef7253STejun Heo int ata_host_start(struct ata_host *host) 6247ecef7253STejun Heo { 6248ecef7253STejun Heo int i, rc; 6249ecef7253STejun Heo 6250ecef7253STejun Heo if (host->flags & ATA_HOST_STARTED) 6251ecef7253STejun Heo return 0; 6252ecef7253STejun Heo 6253ecef7253STejun Heo for (i = 0; i < host->n_ports; i++) { 6254ecef7253STejun Heo struct ata_port *ap = host->ports[i]; 6255ecef7253STejun Heo 6256f3187195STejun Heo if (!host->ops && !ata_port_is_dummy(ap)) 6257f3187195STejun Heo host->ops = ap->ops; 6258f3187195STejun Heo 6259ecef7253STejun Heo if (ap->ops->port_start) { 6260ecef7253STejun Heo rc = ap->ops->port_start(ap); 6261ecef7253STejun Heo if (rc) { 6262ecef7253STejun Heo ata_port_printk(ap, KERN_ERR, "failed to " 6263ecef7253STejun Heo "start port (errno=%d)\n", rc); 6264ecef7253STejun Heo goto err_out; 6265ecef7253STejun Heo } 6266ecef7253STejun Heo } 6267ecef7253STejun Heo 6268ecef7253STejun Heo ata_eh_freeze_port(ap); 6269ecef7253STejun Heo } 6270ecef7253STejun Heo 6271ecef7253STejun Heo host->flags |= ATA_HOST_STARTED; 6272ecef7253STejun Heo return 0; 6273ecef7253STejun Heo 6274ecef7253STejun Heo err_out: 6275ecef7253STejun Heo while (--i >= 0) { 6276ecef7253STejun Heo struct ata_port *ap = host->ports[i]; 6277ecef7253STejun Heo 6278ecef7253STejun Heo if (ap->ops->port_stop) 6279ecef7253STejun Heo ap->ops->port_stop(ap); 6280ecef7253STejun Heo } 6281ecef7253STejun Heo return rc; 6282ecef7253STejun Heo } 6283ecef7253STejun Heo 6284ecef7253STejun Heo /** 6285cca3974eSJeff Garzik * ata_sas_host_init - Initialize a host struct 6286cca3974eSJeff Garzik * @host: host to initialize 6287cca3974eSJeff Garzik * @dev: device host is attached to 6288cca3974eSJeff Garzik * @flags: host flags 6289c6fd2807SJeff Garzik * @ops: port_ops 6290c6fd2807SJeff Garzik * 6291c6fd2807SJeff Garzik * LOCKING: 6292c6fd2807SJeff Garzik * PCI/etc. bus probe sem. 6293c6fd2807SJeff Garzik * 6294c6fd2807SJeff Garzik */ 6295f3187195STejun Heo /* KILLME - the only user left is ipr */ 6296cca3974eSJeff Garzik void ata_host_init(struct ata_host *host, struct device *dev, 6297cca3974eSJeff Garzik unsigned long flags, const struct ata_port_operations *ops) 6298c6fd2807SJeff Garzik { 6299cca3974eSJeff Garzik spin_lock_init(&host->lock); 6300cca3974eSJeff Garzik host->dev = dev; 6301cca3974eSJeff Garzik host->flags = flags; 6302cca3974eSJeff Garzik host->ops = ops; 6303c6fd2807SJeff Garzik } 6304c6fd2807SJeff Garzik 6305c6fd2807SJeff Garzik /** 6306f3187195STejun Heo * ata_host_register - register initialized ATA host 6307f3187195STejun Heo * @host: ATA host to register 6308f3187195STejun Heo * @sht: template for SCSI host 6309c6fd2807SJeff Garzik * 6310f3187195STejun Heo * Register initialized ATA host. @host is allocated using 6311f3187195STejun Heo * ata_host_alloc() and fully initialized by LLD. This function 6312f3187195STejun Heo * starts ports, registers @host with ATA and SCSI layers and 6313f3187195STejun Heo * probe registered devices. 6314c6fd2807SJeff Garzik * 6315c6fd2807SJeff Garzik * LOCKING: 6316f3187195STejun Heo * Inherited from calling layer (may sleep). 6317c6fd2807SJeff Garzik * 6318c6fd2807SJeff Garzik * RETURNS: 6319f3187195STejun Heo * 0 on success, -errno otherwise. 6320c6fd2807SJeff Garzik */ 6321f3187195STejun Heo int ata_host_register(struct ata_host *host, struct scsi_host_template *sht) 6322c6fd2807SJeff Garzik { 6323f3187195STejun Heo int i, rc; 6324c6fd2807SJeff Garzik 6325f3187195STejun Heo /* host must have been started */ 6326f3187195STejun Heo if (!(host->flags & ATA_HOST_STARTED)) { 6327f3187195STejun Heo dev_printk(KERN_ERR, host->dev, 6328f3187195STejun Heo "BUG: trying to register unstarted host\n"); 6329f3187195STejun Heo WARN_ON(1); 6330f3187195STejun Heo return -EINVAL; 633102f076aaSAlan Cox } 6332f0d36efdSTejun Heo 6333f3187195STejun Heo /* Blow away unused ports. This happens when LLD can't 6334f3187195STejun Heo * determine the exact number of ports to allocate at 6335f3187195STejun Heo * allocation time. 6336f3187195STejun Heo */ 6337f3187195STejun Heo for (i = host->n_ports; host->ports[i]; i++) 6338f3187195STejun Heo kfree(host->ports[i]); 6339f0d36efdSTejun Heo 6340f3187195STejun Heo /* give ports names and add SCSI hosts */ 6341f3187195STejun Heo for (i = 0; i < host->n_ports; i++) 6342f3187195STejun Heo host->ports[i]->print_id = ata_print_id++; 6343c6fd2807SJeff Garzik 6344f3187195STejun Heo rc = ata_scsi_add_hosts(host, sht); 6345ecef7253STejun Heo if (rc) 6346f3187195STejun Heo return rc; 6347ecef7253STejun Heo 6348fafbae87STejun Heo /* associate with ACPI nodes */ 6349fafbae87STejun Heo ata_acpi_associate(host); 6350fafbae87STejun Heo 6351f3187195STejun Heo /* set cable, sata_spd_limit and report */ 6352cca3974eSJeff Garzik for (i = 0; i < host->n_ports; i++) { 6353cca3974eSJeff Garzik struct ata_port *ap = host->ports[i]; 6354f3187195STejun Heo int irq_line; 6355c6fd2807SJeff Garzik u32 scontrol; 6356f3187195STejun Heo unsigned long xfer_mask; 6357f3187195STejun Heo 6358f3187195STejun Heo /* set SATA cable type if still unset */ 6359f3187195STejun Heo if (ap->cbl == ATA_CBL_NONE && (ap->flags & ATA_FLAG_SATA)) 6360f3187195STejun Heo ap->cbl = ATA_CBL_SATA; 6361c6fd2807SJeff Garzik 6362c6fd2807SJeff Garzik /* init sata_spd_limit to the current value */ 6363c6fd2807SJeff Garzik if (sata_scr_read(ap, SCR_CONTROL, &scontrol) == 0) { 6364c6fd2807SJeff Garzik int spd = (scontrol >> 4) & 0xf; 6365afe3cc51STejun Heo if (spd) 6366c6fd2807SJeff Garzik ap->hw_sata_spd_limit &= (1 << spd) - 1; 6367c6fd2807SJeff Garzik } 6368c6fd2807SJeff Garzik ap->sata_spd_limit = ap->hw_sata_spd_limit; 6369c6fd2807SJeff Garzik 6370f3187195STejun Heo /* report the secondary IRQ for second channel legacy */ 6371f3187195STejun Heo irq_line = host->irq; 6372f3187195STejun Heo if (i == 1 && host->irq2) 6373f3187195STejun Heo irq_line = host->irq2; 6374f3187195STejun Heo 6375f3187195STejun Heo xfer_mask = ata_pack_xfermask(ap->pio_mask, ap->mwdma_mask, 6376f3187195STejun Heo ap->udma_mask); 6377f3187195STejun Heo 6378f3187195STejun Heo /* print per-port info to dmesg */ 6379f3187195STejun Heo if (!ata_port_is_dummy(ap)) 6380f3187195STejun Heo ata_port_printk(ap, KERN_INFO, "%cATA max %s cmd 0x%p " 6381f3187195STejun Heo "ctl 0x%p bmdma 0x%p irq %d\n", 6382a16abc0bSTejun Heo (ap->flags & ATA_FLAG_SATA) ? 'S' : 'P', 6383f3187195STejun Heo ata_mode_string(xfer_mask), 6384f3187195STejun Heo ap->ioaddr.cmd_addr, 6385f3187195STejun Heo ap->ioaddr.ctl_addr, 6386f3187195STejun Heo ap->ioaddr.bmdma_addr, 6387f3187195STejun Heo irq_line); 6388f3187195STejun Heo else 6389f3187195STejun Heo ata_port_printk(ap, KERN_INFO, "DUMMY\n"); 6390c6fd2807SJeff Garzik } 6391c6fd2807SJeff Garzik 6392f3187195STejun Heo /* perform each probe synchronously */ 6393f3187195STejun Heo DPRINTK("probe begin\n"); 6394f3187195STejun Heo for (i = 0; i < host->n_ports; i++) { 6395f3187195STejun Heo struct ata_port *ap = host->ports[i]; 6396f3187195STejun Heo int rc; 6397f3187195STejun Heo 6398f3187195STejun Heo /* probe */ 6399c6fd2807SJeff Garzik if (ap->ops->error_handler) { 6400c6fd2807SJeff Garzik struct ata_eh_info *ehi = &ap->eh_info; 6401c6fd2807SJeff Garzik unsigned long flags; 6402c6fd2807SJeff Garzik 6403c6fd2807SJeff Garzik ata_port_probe(ap); 6404c6fd2807SJeff Garzik 6405c6fd2807SJeff Garzik /* kick EH for boot probing */ 6406c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 6407c6fd2807SJeff Garzik 6408c6fd2807SJeff Garzik ehi->probe_mask = (1 << ATA_MAX_DEVICES) - 1; 6409c6fd2807SJeff Garzik ehi->action |= ATA_EH_SOFTRESET; 6410c6fd2807SJeff Garzik ehi->flags |= ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET; 6411c6fd2807SJeff Garzik 6412f4d6d004STejun Heo ap->pflags &= ~ATA_PFLAG_INITIALIZING; 6413c6fd2807SJeff Garzik ap->pflags |= ATA_PFLAG_LOADING; 6414c6fd2807SJeff Garzik ata_port_schedule_eh(ap); 6415c6fd2807SJeff Garzik 6416c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 6417c6fd2807SJeff Garzik 6418c6fd2807SJeff Garzik /* wait for EH to finish */ 6419c6fd2807SJeff Garzik ata_port_wait_eh(ap); 6420c6fd2807SJeff Garzik } else { 642144877b4eSTejun Heo DPRINTK("ata%u: bus probe begin\n", ap->print_id); 6422c6fd2807SJeff Garzik rc = ata_bus_probe(ap); 642344877b4eSTejun Heo DPRINTK("ata%u: bus probe end\n", ap->print_id); 6424c6fd2807SJeff Garzik 6425c6fd2807SJeff Garzik if (rc) { 6426c6fd2807SJeff Garzik /* FIXME: do something useful here? 6427c6fd2807SJeff Garzik * Current libata behavior will 6428c6fd2807SJeff Garzik * tear down everything when 6429c6fd2807SJeff Garzik * the module is removed 6430c6fd2807SJeff Garzik * or the h/w is unplugged. 6431c6fd2807SJeff Garzik */ 6432c6fd2807SJeff Garzik } 6433c6fd2807SJeff Garzik } 6434c6fd2807SJeff Garzik } 6435c6fd2807SJeff Garzik 6436c6fd2807SJeff Garzik /* probes are done, now scan each port's disk(s) */ 6437c6fd2807SJeff Garzik DPRINTK("host probe begin\n"); 6438cca3974eSJeff Garzik for (i = 0; i < host->n_ports; i++) { 6439cca3974eSJeff Garzik struct ata_port *ap = host->ports[i]; 6440c6fd2807SJeff Garzik 6441c6fd2807SJeff Garzik ata_scsi_scan_host(ap); 6442c6fd2807SJeff Garzik } 6443c6fd2807SJeff Garzik 6444f3187195STejun Heo return 0; 6445f3187195STejun Heo } 6446f3187195STejun Heo 6447f3187195STejun Heo /** 6448f5cda257STejun Heo * ata_host_activate - start host, request IRQ and register it 6449f5cda257STejun Heo * @host: target ATA host 6450f5cda257STejun Heo * @irq: IRQ to request 6451f5cda257STejun Heo * @irq_handler: irq_handler used when requesting IRQ 6452f5cda257STejun Heo * @irq_flags: irq_flags used when requesting IRQ 6453f5cda257STejun Heo * @sht: scsi_host_template to use when registering the host 6454f5cda257STejun Heo * 6455f5cda257STejun Heo * After allocating an ATA host and initializing it, most libata 6456f5cda257STejun Heo * LLDs perform three steps to activate the host - start host, 6457f5cda257STejun Heo * request IRQ and register it. This helper takes necessasry 6458f5cda257STejun Heo * arguments and performs the three steps in one go. 6459f5cda257STejun Heo * 6460f5cda257STejun Heo * LOCKING: 6461f5cda257STejun Heo * Inherited from calling layer (may sleep). 6462f5cda257STejun Heo * 6463f5cda257STejun Heo * RETURNS: 6464f5cda257STejun Heo * 0 on success, -errno otherwise. 6465f5cda257STejun Heo */ 6466f5cda257STejun Heo int ata_host_activate(struct ata_host *host, int irq, 6467f5cda257STejun Heo irq_handler_t irq_handler, unsigned long irq_flags, 6468f5cda257STejun Heo struct scsi_host_template *sht) 6469f5cda257STejun Heo { 6470f5cda257STejun Heo int rc; 6471f5cda257STejun Heo 6472f5cda257STejun Heo rc = ata_host_start(host); 6473f5cda257STejun Heo if (rc) 6474f5cda257STejun Heo return rc; 6475f5cda257STejun Heo 6476f5cda257STejun Heo rc = devm_request_irq(host->dev, irq, irq_handler, irq_flags, 6477f5cda257STejun Heo dev_driver_string(host->dev), host); 6478f5cda257STejun Heo if (rc) 6479f5cda257STejun Heo return rc; 6480f5cda257STejun Heo 64814031826bSTejun Heo /* Used to print device info at probe */ 64824031826bSTejun Heo host->irq = irq; 64834031826bSTejun Heo 6484f5cda257STejun Heo rc = ata_host_register(host, sht); 6485f5cda257STejun Heo /* if failed, just free the IRQ and leave ports alone */ 6486f5cda257STejun Heo if (rc) 6487f5cda257STejun Heo devm_free_irq(host->dev, irq, host); 6488f5cda257STejun Heo 6489f5cda257STejun Heo return rc; 6490f5cda257STejun Heo } 6491f5cda257STejun Heo 6492f5cda257STejun Heo /** 6493c6fd2807SJeff Garzik * ata_port_detach - Detach ATA port in prepration of device removal 6494c6fd2807SJeff Garzik * @ap: ATA port to be detached 6495c6fd2807SJeff Garzik * 6496c6fd2807SJeff Garzik * Detach all ATA devices and the associated SCSI devices of @ap; 6497c6fd2807SJeff Garzik * then, remove the associated SCSI host. @ap is guaranteed to 6498c6fd2807SJeff Garzik * be quiescent on return from this function. 6499c6fd2807SJeff Garzik * 6500c6fd2807SJeff Garzik * LOCKING: 6501c6fd2807SJeff Garzik * Kernel thread context (may sleep). 6502c6fd2807SJeff Garzik */ 6503c6fd2807SJeff Garzik void ata_port_detach(struct ata_port *ap) 6504c6fd2807SJeff Garzik { 6505c6fd2807SJeff Garzik unsigned long flags; 6506c6fd2807SJeff Garzik int i; 6507c6fd2807SJeff Garzik 6508c6fd2807SJeff Garzik if (!ap->ops->error_handler) 6509c6fd2807SJeff Garzik goto skip_eh; 6510c6fd2807SJeff Garzik 6511c6fd2807SJeff Garzik /* tell EH we're leaving & flush EH */ 6512c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 6513c6fd2807SJeff Garzik ap->pflags |= ATA_PFLAG_UNLOADING; 6514c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 6515c6fd2807SJeff Garzik 6516c6fd2807SJeff Garzik ata_port_wait_eh(ap); 6517c6fd2807SJeff Garzik 6518c6fd2807SJeff Garzik /* EH is now guaranteed to see UNLOADING, so no new device 6519c6fd2807SJeff Garzik * will be attached. Disable all existing devices. 6520c6fd2807SJeff Garzik */ 6521c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 6522c6fd2807SJeff Garzik 6523c6fd2807SJeff Garzik for (i = 0; i < ATA_MAX_DEVICES; i++) 6524c6fd2807SJeff Garzik ata_dev_disable(&ap->device[i]); 6525c6fd2807SJeff Garzik 6526c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 6527c6fd2807SJeff Garzik 6528c6fd2807SJeff Garzik /* Final freeze & EH. All in-flight commands are aborted. EH 6529c6fd2807SJeff Garzik * will be skipped and retrials will be terminated with bad 6530c6fd2807SJeff Garzik * target. 6531c6fd2807SJeff Garzik */ 6532c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 6533c6fd2807SJeff Garzik ata_port_freeze(ap); /* won't be thawed */ 6534c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 6535c6fd2807SJeff Garzik 6536c6fd2807SJeff Garzik ata_port_wait_eh(ap); 653745a66c1cSOleg Nesterov cancel_rearming_delayed_work(&ap->hotplug_task); 6538c6fd2807SJeff Garzik 6539c6fd2807SJeff Garzik skip_eh: 6540c6fd2807SJeff Garzik /* remove the associated SCSI host */ 6541cca3974eSJeff Garzik scsi_remove_host(ap->scsi_host); 6542c6fd2807SJeff Garzik } 6543c6fd2807SJeff Garzik 6544c6fd2807SJeff Garzik /** 65450529c159STejun Heo * ata_host_detach - Detach all ports of an ATA host 65460529c159STejun Heo * @host: Host to detach 65470529c159STejun Heo * 65480529c159STejun Heo * Detach all ports of @host. 65490529c159STejun Heo * 65500529c159STejun Heo * LOCKING: 65510529c159STejun Heo * Kernel thread context (may sleep). 65520529c159STejun Heo */ 65530529c159STejun Heo void ata_host_detach(struct ata_host *host) 65540529c159STejun Heo { 65550529c159STejun Heo int i; 65560529c159STejun Heo 65570529c159STejun Heo for (i = 0; i < host->n_ports; i++) 65580529c159STejun Heo ata_port_detach(host->ports[i]); 65590529c159STejun Heo } 65600529c159STejun Heo 6561c6fd2807SJeff Garzik /** 6562c6fd2807SJeff Garzik * ata_std_ports - initialize ioaddr with standard port offsets. 6563c6fd2807SJeff Garzik * @ioaddr: IO address structure to be initialized 6564c6fd2807SJeff Garzik * 6565c6fd2807SJeff Garzik * Utility function which initializes data_addr, error_addr, 6566c6fd2807SJeff Garzik * feature_addr, nsect_addr, lbal_addr, lbam_addr, lbah_addr, 6567c6fd2807SJeff Garzik * device_addr, status_addr, and command_addr to standard offsets 6568c6fd2807SJeff Garzik * relative to cmd_addr. 6569c6fd2807SJeff Garzik * 6570c6fd2807SJeff Garzik * Does not set ctl_addr, altstatus_addr, bmdma_addr, or scr_addr. 6571c6fd2807SJeff Garzik */ 6572c6fd2807SJeff Garzik 6573c6fd2807SJeff Garzik void ata_std_ports(struct ata_ioports *ioaddr) 6574c6fd2807SJeff Garzik { 6575c6fd2807SJeff Garzik ioaddr->data_addr = ioaddr->cmd_addr + ATA_REG_DATA; 6576c6fd2807SJeff Garzik ioaddr->error_addr = ioaddr->cmd_addr + ATA_REG_ERR; 6577c6fd2807SJeff Garzik ioaddr->feature_addr = ioaddr->cmd_addr + ATA_REG_FEATURE; 6578c6fd2807SJeff Garzik ioaddr->nsect_addr = ioaddr->cmd_addr + ATA_REG_NSECT; 6579c6fd2807SJeff Garzik ioaddr->lbal_addr = ioaddr->cmd_addr + ATA_REG_LBAL; 6580c6fd2807SJeff Garzik ioaddr->lbam_addr = ioaddr->cmd_addr + ATA_REG_LBAM; 6581c6fd2807SJeff Garzik ioaddr->lbah_addr = ioaddr->cmd_addr + ATA_REG_LBAH; 6582c6fd2807SJeff Garzik ioaddr->device_addr = ioaddr->cmd_addr + ATA_REG_DEVICE; 6583c6fd2807SJeff Garzik ioaddr->status_addr = ioaddr->cmd_addr + ATA_REG_STATUS; 6584c6fd2807SJeff Garzik ioaddr->command_addr = ioaddr->cmd_addr + ATA_REG_CMD; 6585c6fd2807SJeff Garzik } 6586c6fd2807SJeff Garzik 6587c6fd2807SJeff Garzik 6588c6fd2807SJeff Garzik #ifdef CONFIG_PCI 6589c6fd2807SJeff Garzik 6590c6fd2807SJeff Garzik /** 6591c6fd2807SJeff Garzik * ata_pci_remove_one - PCI layer callback for device removal 6592c6fd2807SJeff Garzik * @pdev: PCI device that was removed 6593c6fd2807SJeff Garzik * 6594b878ca5dSTejun Heo * PCI layer indicates to libata via this hook that hot-unplug or 6595b878ca5dSTejun Heo * module unload event has occurred. Detach all ports. Resource 6596b878ca5dSTejun Heo * release is handled via devres. 6597c6fd2807SJeff Garzik * 6598c6fd2807SJeff Garzik * LOCKING: 6599c6fd2807SJeff Garzik * Inherited from PCI layer (may sleep). 6600c6fd2807SJeff Garzik */ 6601c6fd2807SJeff Garzik void ata_pci_remove_one(struct pci_dev *pdev) 6602c6fd2807SJeff Garzik { 6603c6fd2807SJeff Garzik struct device *dev = pci_dev_to_dev(pdev); 6604cca3974eSJeff Garzik struct ata_host *host = dev_get_drvdata(dev); 6605c6fd2807SJeff Garzik 6606f0d36efdSTejun Heo ata_host_detach(host); 6607c6fd2807SJeff Garzik } 6608c6fd2807SJeff Garzik 6609c6fd2807SJeff Garzik /* move to PCI subsystem */ 6610c6fd2807SJeff Garzik int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits) 6611c6fd2807SJeff Garzik { 6612c6fd2807SJeff Garzik unsigned long tmp = 0; 6613c6fd2807SJeff Garzik 6614c6fd2807SJeff Garzik switch (bits->width) { 6615c6fd2807SJeff Garzik case 1: { 6616c6fd2807SJeff Garzik u8 tmp8 = 0; 6617c6fd2807SJeff Garzik pci_read_config_byte(pdev, bits->reg, &tmp8); 6618c6fd2807SJeff Garzik tmp = tmp8; 6619c6fd2807SJeff Garzik break; 6620c6fd2807SJeff Garzik } 6621c6fd2807SJeff Garzik case 2: { 6622c6fd2807SJeff Garzik u16 tmp16 = 0; 6623c6fd2807SJeff Garzik pci_read_config_word(pdev, bits->reg, &tmp16); 6624c6fd2807SJeff Garzik tmp = tmp16; 6625c6fd2807SJeff Garzik break; 6626c6fd2807SJeff Garzik } 6627c6fd2807SJeff Garzik case 4: { 6628c6fd2807SJeff Garzik u32 tmp32 = 0; 6629c6fd2807SJeff Garzik pci_read_config_dword(pdev, bits->reg, &tmp32); 6630c6fd2807SJeff Garzik tmp = tmp32; 6631c6fd2807SJeff Garzik break; 6632c6fd2807SJeff Garzik } 6633c6fd2807SJeff Garzik 6634c6fd2807SJeff Garzik default: 6635c6fd2807SJeff Garzik return -EINVAL; 6636c6fd2807SJeff Garzik } 6637c6fd2807SJeff Garzik 6638c6fd2807SJeff Garzik tmp &= bits->mask; 6639c6fd2807SJeff Garzik 6640c6fd2807SJeff Garzik return (tmp == bits->val) ? 1 : 0; 6641c6fd2807SJeff Garzik } 6642c6fd2807SJeff Garzik 66436ffa01d8STejun Heo #ifdef CONFIG_PM 6644c6fd2807SJeff Garzik void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg) 6645c6fd2807SJeff Garzik { 6646c6fd2807SJeff Garzik pci_save_state(pdev); 6647c6fd2807SJeff Garzik pci_disable_device(pdev); 66484c90d971STejun Heo 66494c90d971STejun Heo if (mesg.event == PM_EVENT_SUSPEND) 6650c6fd2807SJeff Garzik pci_set_power_state(pdev, PCI_D3hot); 6651c6fd2807SJeff Garzik } 6652c6fd2807SJeff Garzik 6653553c4aa6STejun Heo int ata_pci_device_do_resume(struct pci_dev *pdev) 6654c6fd2807SJeff Garzik { 6655553c4aa6STejun Heo int rc; 6656553c4aa6STejun Heo 6657c6fd2807SJeff Garzik pci_set_power_state(pdev, PCI_D0); 6658c6fd2807SJeff Garzik pci_restore_state(pdev); 6659553c4aa6STejun Heo 6660f0d36efdSTejun Heo rc = pcim_enable_device(pdev); 6661553c4aa6STejun Heo if (rc) { 6662553c4aa6STejun Heo dev_printk(KERN_ERR, &pdev->dev, 6663553c4aa6STejun Heo "failed to enable device after resume (%d)\n", rc); 6664553c4aa6STejun Heo return rc; 6665553c4aa6STejun Heo } 6666553c4aa6STejun Heo 6667c6fd2807SJeff Garzik pci_set_master(pdev); 6668553c4aa6STejun Heo return 0; 6669c6fd2807SJeff Garzik } 6670c6fd2807SJeff Garzik 6671c6fd2807SJeff Garzik int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg) 6672c6fd2807SJeff Garzik { 6673cca3974eSJeff Garzik struct ata_host *host = dev_get_drvdata(&pdev->dev); 6674c6fd2807SJeff Garzik int rc = 0; 6675c6fd2807SJeff Garzik 6676cca3974eSJeff Garzik rc = ata_host_suspend(host, mesg); 6677c6fd2807SJeff Garzik if (rc) 6678c6fd2807SJeff Garzik return rc; 6679c6fd2807SJeff Garzik 6680c6fd2807SJeff Garzik ata_pci_device_do_suspend(pdev, mesg); 6681c6fd2807SJeff Garzik 6682c6fd2807SJeff Garzik return 0; 6683c6fd2807SJeff Garzik } 6684c6fd2807SJeff Garzik 6685c6fd2807SJeff Garzik int ata_pci_device_resume(struct pci_dev *pdev) 6686c6fd2807SJeff Garzik { 6687cca3974eSJeff Garzik struct ata_host *host = dev_get_drvdata(&pdev->dev); 6688553c4aa6STejun Heo int rc; 6689c6fd2807SJeff Garzik 6690553c4aa6STejun Heo rc = ata_pci_device_do_resume(pdev); 6691553c4aa6STejun Heo if (rc == 0) 6692cca3974eSJeff Garzik ata_host_resume(host); 6693553c4aa6STejun Heo return rc; 6694c6fd2807SJeff Garzik } 66956ffa01d8STejun Heo #endif /* CONFIG_PM */ 66966ffa01d8STejun Heo 6697c6fd2807SJeff Garzik #endif /* CONFIG_PCI */ 6698c6fd2807SJeff Garzik 6699c6fd2807SJeff Garzik 6700c6fd2807SJeff Garzik static int __init ata_init(void) 6701c6fd2807SJeff Garzik { 6702c6fd2807SJeff Garzik ata_probe_timeout *= HZ; 6703c6fd2807SJeff Garzik ata_wq = create_workqueue("ata"); 6704c6fd2807SJeff Garzik if (!ata_wq) 6705c6fd2807SJeff Garzik return -ENOMEM; 6706c6fd2807SJeff Garzik 6707c6fd2807SJeff Garzik ata_aux_wq = create_singlethread_workqueue("ata_aux"); 6708c6fd2807SJeff Garzik if (!ata_aux_wq) { 6709c6fd2807SJeff Garzik destroy_workqueue(ata_wq); 6710c6fd2807SJeff Garzik return -ENOMEM; 6711c6fd2807SJeff Garzik } 6712c6fd2807SJeff Garzik 6713c6fd2807SJeff Garzik printk(KERN_DEBUG "libata version " DRV_VERSION " loaded.\n"); 6714c6fd2807SJeff Garzik return 0; 6715c6fd2807SJeff Garzik } 6716c6fd2807SJeff Garzik 6717c6fd2807SJeff Garzik static void __exit ata_exit(void) 6718c6fd2807SJeff Garzik { 6719c6fd2807SJeff Garzik destroy_workqueue(ata_wq); 6720c6fd2807SJeff Garzik destroy_workqueue(ata_aux_wq); 6721c6fd2807SJeff Garzik } 6722c6fd2807SJeff Garzik 6723a4625085SBrian King subsys_initcall(ata_init); 6724c6fd2807SJeff Garzik module_exit(ata_exit); 6725c6fd2807SJeff Garzik 6726c6fd2807SJeff Garzik static unsigned long ratelimit_time; 6727c6fd2807SJeff Garzik static DEFINE_SPINLOCK(ata_ratelimit_lock); 6728c6fd2807SJeff Garzik 6729c6fd2807SJeff Garzik int ata_ratelimit(void) 6730c6fd2807SJeff Garzik { 6731c6fd2807SJeff Garzik int rc; 6732c6fd2807SJeff Garzik unsigned long flags; 6733c6fd2807SJeff Garzik 6734c6fd2807SJeff Garzik spin_lock_irqsave(&ata_ratelimit_lock, flags); 6735c6fd2807SJeff Garzik 6736c6fd2807SJeff Garzik if (time_after(jiffies, ratelimit_time)) { 6737c6fd2807SJeff Garzik rc = 1; 6738c6fd2807SJeff Garzik ratelimit_time = jiffies + (HZ/5); 6739c6fd2807SJeff Garzik } else 6740c6fd2807SJeff Garzik rc = 0; 6741c6fd2807SJeff Garzik 6742c6fd2807SJeff Garzik spin_unlock_irqrestore(&ata_ratelimit_lock, flags); 6743c6fd2807SJeff Garzik 6744c6fd2807SJeff Garzik return rc; 6745c6fd2807SJeff Garzik } 6746c6fd2807SJeff Garzik 6747c6fd2807SJeff Garzik /** 6748c6fd2807SJeff Garzik * ata_wait_register - wait until register value changes 6749c6fd2807SJeff Garzik * @reg: IO-mapped register 6750c6fd2807SJeff Garzik * @mask: Mask to apply to read register value 6751c6fd2807SJeff Garzik * @val: Wait condition 6752c6fd2807SJeff Garzik * @interval_msec: polling interval in milliseconds 6753c6fd2807SJeff Garzik * @timeout_msec: timeout in milliseconds 6754c6fd2807SJeff Garzik * 6755c6fd2807SJeff Garzik * Waiting for some bits of register to change is a common 6756c6fd2807SJeff Garzik * operation for ATA controllers. This function reads 32bit LE 6757c6fd2807SJeff Garzik * IO-mapped register @reg and tests for the following condition. 6758c6fd2807SJeff Garzik * 6759c6fd2807SJeff Garzik * (*@reg & mask) != val 6760c6fd2807SJeff Garzik * 6761c6fd2807SJeff Garzik * If the condition is met, it returns; otherwise, the process is 6762c6fd2807SJeff Garzik * repeated after @interval_msec until timeout. 6763c6fd2807SJeff Garzik * 6764c6fd2807SJeff Garzik * LOCKING: 6765c6fd2807SJeff Garzik * Kernel thread context (may sleep) 6766c6fd2807SJeff Garzik * 6767c6fd2807SJeff Garzik * RETURNS: 6768c6fd2807SJeff Garzik * The final register value. 6769c6fd2807SJeff Garzik */ 6770c6fd2807SJeff Garzik u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val, 6771c6fd2807SJeff Garzik unsigned long interval_msec, 6772c6fd2807SJeff Garzik unsigned long timeout_msec) 6773c6fd2807SJeff Garzik { 6774c6fd2807SJeff Garzik unsigned long timeout; 6775c6fd2807SJeff Garzik u32 tmp; 6776c6fd2807SJeff Garzik 6777c6fd2807SJeff Garzik tmp = ioread32(reg); 6778c6fd2807SJeff Garzik 6779c6fd2807SJeff Garzik /* Calculate timeout _after_ the first read to make sure 6780c6fd2807SJeff Garzik * preceding writes reach the controller before starting to 6781c6fd2807SJeff Garzik * eat away the timeout. 6782c6fd2807SJeff Garzik */ 6783c6fd2807SJeff Garzik timeout = jiffies + (timeout_msec * HZ) / 1000; 6784c6fd2807SJeff Garzik 6785c6fd2807SJeff Garzik while ((tmp & mask) == val && time_before(jiffies, timeout)) { 6786c6fd2807SJeff Garzik msleep(interval_msec); 6787c6fd2807SJeff Garzik tmp = ioread32(reg); 6788c6fd2807SJeff Garzik } 6789c6fd2807SJeff Garzik 6790c6fd2807SJeff Garzik return tmp; 6791c6fd2807SJeff Garzik } 6792c6fd2807SJeff Garzik 6793c6fd2807SJeff Garzik /* 6794c6fd2807SJeff Garzik * Dummy port_ops 6795c6fd2807SJeff Garzik */ 6796c6fd2807SJeff Garzik static void ata_dummy_noret(struct ata_port *ap) { } 6797c6fd2807SJeff Garzik static int ata_dummy_ret0(struct ata_port *ap) { return 0; } 6798c6fd2807SJeff Garzik static void ata_dummy_qc_noret(struct ata_queued_cmd *qc) { } 6799c6fd2807SJeff Garzik 6800c6fd2807SJeff Garzik static u8 ata_dummy_check_status(struct ata_port *ap) 6801c6fd2807SJeff Garzik { 6802c6fd2807SJeff Garzik return ATA_DRDY; 6803c6fd2807SJeff Garzik } 6804c6fd2807SJeff Garzik 6805c6fd2807SJeff Garzik static unsigned int ata_dummy_qc_issue(struct ata_queued_cmd *qc) 6806c6fd2807SJeff Garzik { 6807c6fd2807SJeff Garzik return AC_ERR_SYSTEM; 6808c6fd2807SJeff Garzik } 6809c6fd2807SJeff Garzik 6810c6fd2807SJeff Garzik const struct ata_port_operations ata_dummy_port_ops = { 6811c6fd2807SJeff Garzik .port_disable = ata_port_disable, 6812c6fd2807SJeff Garzik .check_status = ata_dummy_check_status, 6813c6fd2807SJeff Garzik .check_altstatus = ata_dummy_check_status, 6814c6fd2807SJeff Garzik .dev_select = ata_noop_dev_select, 6815c6fd2807SJeff Garzik .qc_prep = ata_noop_qc_prep, 6816c6fd2807SJeff Garzik .qc_issue = ata_dummy_qc_issue, 6817c6fd2807SJeff Garzik .freeze = ata_dummy_noret, 6818c6fd2807SJeff Garzik .thaw = ata_dummy_noret, 6819c6fd2807SJeff Garzik .error_handler = ata_dummy_noret, 6820c6fd2807SJeff Garzik .post_internal_cmd = ata_dummy_qc_noret, 6821c6fd2807SJeff Garzik .irq_clear = ata_dummy_noret, 6822c6fd2807SJeff Garzik .port_start = ata_dummy_ret0, 6823c6fd2807SJeff Garzik .port_stop = ata_dummy_noret, 6824c6fd2807SJeff Garzik }; 6825c6fd2807SJeff Garzik 682621b0ad4fSTejun Heo const struct ata_port_info ata_dummy_port_info = { 682721b0ad4fSTejun Heo .port_ops = &ata_dummy_port_ops, 682821b0ad4fSTejun Heo }; 682921b0ad4fSTejun Heo 6830c6fd2807SJeff Garzik /* 6831c6fd2807SJeff Garzik * libata is essentially a library of internal helper functions for 6832c6fd2807SJeff Garzik * low-level ATA host controller drivers. As such, the API/ABI is 6833c6fd2807SJeff Garzik * likely to change as new drivers are added and updated. 6834c6fd2807SJeff Garzik * Do not depend on ABI/API stability. 6835c6fd2807SJeff Garzik */ 6836c6fd2807SJeff Garzik 6837c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(sata_deb_timing_normal); 6838c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(sata_deb_timing_hotplug); 6839c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(sata_deb_timing_long); 6840c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_dummy_port_ops); 684121b0ad4fSTejun Heo EXPORT_SYMBOL_GPL(ata_dummy_port_info); 6842c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_std_bios_param); 6843c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_std_ports); 6844cca3974eSJeff Garzik EXPORT_SYMBOL_GPL(ata_host_init); 6845f3187195STejun Heo EXPORT_SYMBOL_GPL(ata_host_alloc); 6846f5cda257STejun Heo EXPORT_SYMBOL_GPL(ata_host_alloc_pinfo); 6847ecef7253STejun Heo EXPORT_SYMBOL_GPL(ata_host_start); 6848f3187195STejun Heo EXPORT_SYMBOL_GPL(ata_host_register); 6849f5cda257STejun Heo EXPORT_SYMBOL_GPL(ata_host_activate); 68500529c159STejun Heo EXPORT_SYMBOL_GPL(ata_host_detach); 6851c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_sg_init); 6852c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_sg_init_one); 6853c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_hsm_move); 6854c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_qc_complete); 6855c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_qc_complete_multiple); 6856c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_qc_issue_prot); 6857c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_tf_load); 6858c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_tf_read); 6859c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_noop_dev_select); 6860c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_std_dev_select); 686143727fbcSJeff Garzik EXPORT_SYMBOL_GPL(sata_print_link_status); 6862c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_tf_to_fis); 6863c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_tf_from_fis); 6864c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_check_status); 6865c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_altstatus); 6866c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_exec_command); 6867c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_port_start); 6868d92e74d3SAlan Cox EXPORT_SYMBOL_GPL(ata_sff_port_start); 6869c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_interrupt); 687004351821SAlan EXPORT_SYMBOL_GPL(ata_do_set_mode); 68710d5ff566STejun Heo EXPORT_SYMBOL_GPL(ata_data_xfer); 68720d5ff566STejun Heo EXPORT_SYMBOL_GPL(ata_data_xfer_noirq); 6873c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_qc_prep); 6874d26fc955SAlan Cox EXPORT_SYMBOL_GPL(ata_dumb_qc_prep); 6875c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_noop_qc_prep); 6876c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_bmdma_setup); 6877c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_bmdma_start); 6878c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_bmdma_irq_clear); 6879c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_bmdma_status); 6880c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_bmdma_stop); 6881c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_bmdma_freeze); 6882c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_bmdma_thaw); 6883c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_bmdma_drive_eh); 6884c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_bmdma_error_handler); 6885c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_bmdma_post_internal_cmd); 6886c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_port_probe); 688710305f0fSAlan EXPORT_SYMBOL_GPL(ata_dev_disable); 6888c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(sata_set_spd); 6889c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(sata_phy_debounce); 6890c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(sata_phy_resume); 6891c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(sata_phy_reset); 6892c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(__sata_phy_reset); 6893c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_bus_reset); 6894c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_std_prereset); 6895c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_std_softreset); 6896b6103f6dSTejun Heo EXPORT_SYMBOL_GPL(sata_port_hardreset); 6897c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(sata_std_hardreset); 6898c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_std_postreset); 6899c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_dev_classify); 6900c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_dev_pair); 6901c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_port_disable); 6902c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_ratelimit); 6903c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_wait_register); 6904c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_busy_sleep); 6905d4b2bab4STejun Heo EXPORT_SYMBOL_GPL(ata_wait_ready); 6906c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_port_queue_task); 6907c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_scsi_ioctl); 6908c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_scsi_queuecmd); 6909c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_scsi_slave_config); 6910c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_scsi_slave_destroy); 6911c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_scsi_change_queue_depth); 6912c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_host_intr); 6913c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(sata_scr_valid); 6914c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(sata_scr_read); 6915c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(sata_scr_write); 6916c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(sata_scr_write_flush); 6917c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_port_online); 6918c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_port_offline); 69196ffa01d8STejun Heo #ifdef CONFIG_PM 6920cca3974eSJeff Garzik EXPORT_SYMBOL_GPL(ata_host_suspend); 6921cca3974eSJeff Garzik EXPORT_SYMBOL_GPL(ata_host_resume); 69226ffa01d8STejun Heo #endif /* CONFIG_PM */ 6923c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_id_string); 6924c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_id_c_string); 692510305f0fSAlan EXPORT_SYMBOL_GPL(ata_id_to_dma_mode); 6926c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_scsi_simulate); 6927c6fd2807SJeff Garzik 6928c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_pio_need_iordy); 6929c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_timing_compute); 6930c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_timing_merge); 6931c6fd2807SJeff Garzik 6932c6fd2807SJeff Garzik #ifdef CONFIG_PCI 6933c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(pci_test_config_bits); 6934d583bc18STejun Heo EXPORT_SYMBOL_GPL(ata_pci_init_sff_host); 69351626aeb8STejun Heo EXPORT_SYMBOL_GPL(ata_pci_init_bmdma); 6936d583bc18STejun Heo EXPORT_SYMBOL_GPL(ata_pci_prepare_sff_host); 6937c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_pci_init_one); 6938c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_pci_remove_one); 69396ffa01d8STejun Heo #ifdef CONFIG_PM 6940c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_pci_device_do_suspend); 6941c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_pci_device_do_resume); 6942c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_pci_device_suspend); 6943c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_pci_device_resume); 69446ffa01d8STejun Heo #endif /* CONFIG_PM */ 6945c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_pci_default_filter); 6946c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_pci_clear_simplex); 6947c6fd2807SJeff Garzik #endif /* CONFIG_PCI */ 6948c6fd2807SJeff Garzik 6949c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_eng_timeout); 6950c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_port_schedule_eh); 6951c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_port_abort); 6952c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_port_freeze); 6953c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_eh_freeze_port); 6954c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_eh_thaw_port); 6955c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_eh_qc_complete); 6956c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_eh_qc_retry); 6957c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_do_eh); 695883625006SAkira Iguchi EXPORT_SYMBOL_GPL(ata_irq_on); 695983625006SAkira Iguchi EXPORT_SYMBOL_GPL(ata_dummy_irq_on); 696083625006SAkira Iguchi EXPORT_SYMBOL_GPL(ata_irq_ack); 696183625006SAkira Iguchi EXPORT_SYMBOL_GPL(ata_dummy_irq_ack); 6962a619f981SAkira Iguchi EXPORT_SYMBOL_GPL(ata_dev_try_classify); 6963be0d18dfSAlan Cox 6964be0d18dfSAlan Cox EXPORT_SYMBOL_GPL(ata_cable_40wire); 6965be0d18dfSAlan Cox EXPORT_SYMBOL_GPL(ata_cable_80wire); 6966be0d18dfSAlan Cox EXPORT_SYMBOL_GPL(ata_cable_unknown); 6967be0d18dfSAlan Cox EXPORT_SYMBOL_GPL(ata_cable_sata); 6968