1c6fd2807SJeff Garzik /* 2c6fd2807SJeff Garzik * libata-core.c - helper library for ATA 3c6fd2807SJeff Garzik * 4c6fd2807SJeff Garzik * Maintained by: Jeff Garzik <jgarzik@pobox.com> 5c6fd2807SJeff Garzik * Please ALWAYS copy linux-ide@vger.kernel.org 6c6fd2807SJeff Garzik * on emails. 7c6fd2807SJeff Garzik * 8c6fd2807SJeff Garzik * Copyright 2003-2004 Red Hat, Inc. All rights reserved. 9c6fd2807SJeff Garzik * Copyright 2003-2004 Jeff Garzik 10c6fd2807SJeff Garzik * 11c6fd2807SJeff Garzik * 12c6fd2807SJeff Garzik * This program is free software; you can redistribute it and/or modify 13c6fd2807SJeff Garzik * it under the terms of the GNU General Public License as published by 14c6fd2807SJeff Garzik * the Free Software Foundation; either version 2, or (at your option) 15c6fd2807SJeff Garzik * any later version. 16c6fd2807SJeff Garzik * 17c6fd2807SJeff Garzik * This program is distributed in the hope that it will be useful, 18c6fd2807SJeff Garzik * but WITHOUT ANY WARRANTY; without even the implied warranty of 19c6fd2807SJeff Garzik * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 20c6fd2807SJeff Garzik * GNU General Public License for more details. 21c6fd2807SJeff Garzik * 22c6fd2807SJeff Garzik * You should have received a copy of the GNU General Public License 23c6fd2807SJeff Garzik * along with this program; see the file COPYING. If not, write to 24c6fd2807SJeff Garzik * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. 25c6fd2807SJeff Garzik * 26c6fd2807SJeff Garzik * 27c6fd2807SJeff Garzik * libata documentation is available via 'make {ps|pdf}docs', 28c6fd2807SJeff Garzik * as Documentation/DocBook/libata.* 29c6fd2807SJeff Garzik * 30c6fd2807SJeff Garzik * Hardware documentation available from http://www.t13.org/ and 31c6fd2807SJeff Garzik * http://www.sata-io.org/ 32c6fd2807SJeff Garzik * 33c6fd2807SJeff Garzik */ 34c6fd2807SJeff Garzik 35c6fd2807SJeff Garzik #include <linux/kernel.h> 36c6fd2807SJeff Garzik #include <linux/module.h> 37c6fd2807SJeff Garzik #include <linux/pci.h> 38c6fd2807SJeff Garzik #include <linux/init.h> 39c6fd2807SJeff Garzik #include <linux/list.h> 40c6fd2807SJeff Garzik #include <linux/mm.h> 41c6fd2807SJeff Garzik #include <linux/highmem.h> 42c6fd2807SJeff Garzik #include <linux/spinlock.h> 43c6fd2807SJeff Garzik #include <linux/blkdev.h> 44c6fd2807SJeff Garzik #include <linux/delay.h> 45c6fd2807SJeff Garzik #include <linux/timer.h> 46c6fd2807SJeff Garzik #include <linux/interrupt.h> 47c6fd2807SJeff Garzik #include <linux/completion.h> 48c6fd2807SJeff Garzik #include <linux/suspend.h> 49c6fd2807SJeff Garzik #include <linux/workqueue.h> 50c6fd2807SJeff Garzik #include <linux/jiffies.h> 51c6fd2807SJeff Garzik #include <linux/scatterlist.h> 52c6fd2807SJeff Garzik #include <scsi/scsi.h> 53c6fd2807SJeff Garzik #include <scsi/scsi_cmnd.h> 54c6fd2807SJeff Garzik #include <scsi/scsi_host.h> 55c6fd2807SJeff Garzik #include <linux/libata.h> 56c6fd2807SJeff Garzik #include <asm/io.h> 57c6fd2807SJeff Garzik #include <asm/semaphore.h> 58c6fd2807SJeff Garzik #include <asm/byteorder.h> 59c6fd2807SJeff Garzik 60c6fd2807SJeff Garzik #include "libata.h" 61c6fd2807SJeff Garzik 62fda0efc5SJeff Garzik #define DRV_VERSION "2.10" /* must be exactly four chars */ 63fda0efc5SJeff Garzik 64fda0efc5SJeff Garzik 65c6fd2807SJeff Garzik /* debounce timing parameters in msecs { interval, duration, timeout } */ 66c6fd2807SJeff Garzik const unsigned long sata_deb_timing_normal[] = { 5, 100, 2000 }; 67c6fd2807SJeff Garzik const unsigned long sata_deb_timing_hotplug[] = { 25, 500, 2000 }; 68c6fd2807SJeff Garzik const unsigned long sata_deb_timing_long[] = { 100, 2000, 5000 }; 69c6fd2807SJeff Garzik 70c6fd2807SJeff Garzik static unsigned int ata_dev_init_params(struct ata_device *dev, 71c6fd2807SJeff Garzik u16 heads, u16 sectors); 72c6fd2807SJeff Garzik static unsigned int ata_dev_set_xfermode(struct ata_device *dev); 73c6fd2807SJeff Garzik static void ata_dev_xfermask(struct ata_device *dev); 74c6fd2807SJeff Garzik 75c6fd2807SJeff Garzik static unsigned int ata_unique_id = 1; 76c6fd2807SJeff Garzik static struct workqueue_struct *ata_wq; 77c6fd2807SJeff Garzik 78c6fd2807SJeff Garzik struct workqueue_struct *ata_aux_wq; 79c6fd2807SJeff Garzik 80c6fd2807SJeff Garzik int atapi_enabled = 1; 81c6fd2807SJeff Garzik module_param(atapi_enabled, int, 0444); 82c6fd2807SJeff Garzik MODULE_PARM_DESC(atapi_enabled, "Enable discovery of ATAPI devices (0=off, 1=on)"); 83c6fd2807SJeff Garzik 84c6fd2807SJeff Garzik int atapi_dmadir = 0; 85c6fd2807SJeff Garzik module_param(atapi_dmadir, int, 0444); 86c6fd2807SJeff Garzik MODULE_PARM_DESC(atapi_dmadir, "Enable ATAPI DMADIR bridge support (0=off, 1=on)"); 87c6fd2807SJeff Garzik 88c6fd2807SJeff Garzik int libata_fua = 0; 89c6fd2807SJeff Garzik module_param_named(fua, libata_fua, int, 0444); 90c6fd2807SJeff Garzik MODULE_PARM_DESC(fua, "FUA support (0=off, 1=on)"); 91c6fd2807SJeff Garzik 92c6fd2807SJeff Garzik static int ata_probe_timeout = ATA_TMOUT_INTERNAL / HZ; 93c6fd2807SJeff Garzik module_param(ata_probe_timeout, int, 0444); 94c6fd2807SJeff Garzik MODULE_PARM_DESC(ata_probe_timeout, "Set ATA probing timeout (seconds)"); 95c6fd2807SJeff Garzik 96c6fd2807SJeff Garzik MODULE_AUTHOR("Jeff Garzik"); 97c6fd2807SJeff Garzik MODULE_DESCRIPTION("Library module for ATA devices"); 98c6fd2807SJeff Garzik MODULE_LICENSE("GPL"); 99c6fd2807SJeff Garzik MODULE_VERSION(DRV_VERSION); 100c6fd2807SJeff Garzik 101c6fd2807SJeff Garzik 102c6fd2807SJeff Garzik /** 103c6fd2807SJeff Garzik * ata_tf_to_fis - Convert ATA taskfile to SATA FIS structure 104c6fd2807SJeff Garzik * @tf: Taskfile to convert 105c6fd2807SJeff Garzik * @fis: Buffer into which data will output 106c6fd2807SJeff Garzik * @pmp: Port multiplier port 107c6fd2807SJeff Garzik * 108c6fd2807SJeff Garzik * Converts a standard ATA taskfile to a Serial ATA 109c6fd2807SJeff Garzik * FIS structure (Register - Host to Device). 110c6fd2807SJeff Garzik * 111c6fd2807SJeff Garzik * LOCKING: 112c6fd2807SJeff Garzik * Inherited from caller. 113c6fd2807SJeff Garzik */ 114c6fd2807SJeff Garzik 115c6fd2807SJeff Garzik void ata_tf_to_fis(const struct ata_taskfile *tf, u8 *fis, u8 pmp) 116c6fd2807SJeff Garzik { 117c6fd2807SJeff Garzik fis[0] = 0x27; /* Register - Host to Device FIS */ 118c6fd2807SJeff Garzik fis[1] = (pmp & 0xf) | (1 << 7); /* Port multiplier number, 119c6fd2807SJeff Garzik bit 7 indicates Command FIS */ 120c6fd2807SJeff Garzik fis[2] = tf->command; 121c6fd2807SJeff Garzik fis[3] = tf->feature; 122c6fd2807SJeff Garzik 123c6fd2807SJeff Garzik fis[4] = tf->lbal; 124c6fd2807SJeff Garzik fis[5] = tf->lbam; 125c6fd2807SJeff Garzik fis[6] = tf->lbah; 126c6fd2807SJeff Garzik fis[7] = tf->device; 127c6fd2807SJeff Garzik 128c6fd2807SJeff Garzik fis[8] = tf->hob_lbal; 129c6fd2807SJeff Garzik fis[9] = tf->hob_lbam; 130c6fd2807SJeff Garzik fis[10] = tf->hob_lbah; 131c6fd2807SJeff Garzik fis[11] = tf->hob_feature; 132c6fd2807SJeff Garzik 133c6fd2807SJeff Garzik fis[12] = tf->nsect; 134c6fd2807SJeff Garzik fis[13] = tf->hob_nsect; 135c6fd2807SJeff Garzik fis[14] = 0; 136c6fd2807SJeff Garzik fis[15] = tf->ctl; 137c6fd2807SJeff Garzik 138c6fd2807SJeff Garzik fis[16] = 0; 139c6fd2807SJeff Garzik fis[17] = 0; 140c6fd2807SJeff Garzik fis[18] = 0; 141c6fd2807SJeff Garzik fis[19] = 0; 142c6fd2807SJeff Garzik } 143c6fd2807SJeff Garzik 144c6fd2807SJeff Garzik /** 145c6fd2807SJeff Garzik * ata_tf_from_fis - Convert SATA FIS to ATA taskfile 146c6fd2807SJeff Garzik * @fis: Buffer from which data will be input 147c6fd2807SJeff Garzik * @tf: Taskfile to output 148c6fd2807SJeff Garzik * 149c6fd2807SJeff Garzik * Converts a serial ATA FIS structure to a standard ATA taskfile. 150c6fd2807SJeff Garzik * 151c6fd2807SJeff Garzik * LOCKING: 152c6fd2807SJeff Garzik * Inherited from caller. 153c6fd2807SJeff Garzik */ 154c6fd2807SJeff Garzik 155c6fd2807SJeff Garzik void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf) 156c6fd2807SJeff Garzik { 157c6fd2807SJeff Garzik tf->command = fis[2]; /* status */ 158c6fd2807SJeff Garzik tf->feature = fis[3]; /* error */ 159c6fd2807SJeff Garzik 160c6fd2807SJeff Garzik tf->lbal = fis[4]; 161c6fd2807SJeff Garzik tf->lbam = fis[5]; 162c6fd2807SJeff Garzik tf->lbah = fis[6]; 163c6fd2807SJeff Garzik tf->device = fis[7]; 164c6fd2807SJeff Garzik 165c6fd2807SJeff Garzik tf->hob_lbal = fis[8]; 166c6fd2807SJeff Garzik tf->hob_lbam = fis[9]; 167c6fd2807SJeff Garzik tf->hob_lbah = fis[10]; 168c6fd2807SJeff Garzik 169c6fd2807SJeff Garzik tf->nsect = fis[12]; 170c6fd2807SJeff Garzik tf->hob_nsect = fis[13]; 171c6fd2807SJeff Garzik } 172c6fd2807SJeff Garzik 173c6fd2807SJeff Garzik static const u8 ata_rw_cmds[] = { 174c6fd2807SJeff Garzik /* pio multi */ 175c6fd2807SJeff Garzik ATA_CMD_READ_MULTI, 176c6fd2807SJeff Garzik ATA_CMD_WRITE_MULTI, 177c6fd2807SJeff Garzik ATA_CMD_READ_MULTI_EXT, 178c6fd2807SJeff Garzik ATA_CMD_WRITE_MULTI_EXT, 179c6fd2807SJeff Garzik 0, 180c6fd2807SJeff Garzik 0, 181c6fd2807SJeff Garzik 0, 182c6fd2807SJeff Garzik ATA_CMD_WRITE_MULTI_FUA_EXT, 183c6fd2807SJeff Garzik /* pio */ 184c6fd2807SJeff Garzik ATA_CMD_PIO_READ, 185c6fd2807SJeff Garzik ATA_CMD_PIO_WRITE, 186c6fd2807SJeff Garzik ATA_CMD_PIO_READ_EXT, 187c6fd2807SJeff Garzik ATA_CMD_PIO_WRITE_EXT, 188c6fd2807SJeff Garzik 0, 189c6fd2807SJeff Garzik 0, 190c6fd2807SJeff Garzik 0, 191c6fd2807SJeff Garzik 0, 192c6fd2807SJeff Garzik /* dma */ 193c6fd2807SJeff Garzik ATA_CMD_READ, 194c6fd2807SJeff Garzik ATA_CMD_WRITE, 195c6fd2807SJeff Garzik ATA_CMD_READ_EXT, 196c6fd2807SJeff Garzik ATA_CMD_WRITE_EXT, 197c6fd2807SJeff Garzik 0, 198c6fd2807SJeff Garzik 0, 199c6fd2807SJeff Garzik 0, 200c6fd2807SJeff Garzik ATA_CMD_WRITE_FUA_EXT 201c6fd2807SJeff Garzik }; 202c6fd2807SJeff Garzik 203c6fd2807SJeff Garzik /** 204c6fd2807SJeff Garzik * ata_rwcmd_protocol - set taskfile r/w commands and protocol 205bd056d7eSTejun Heo * @tf: command to examine and configure 206bd056d7eSTejun Heo * @dev: device tf belongs to 207c6fd2807SJeff Garzik * 208c6fd2807SJeff Garzik * Examine the device configuration and tf->flags to calculate 209c6fd2807SJeff Garzik * the proper read/write commands and protocol to use. 210c6fd2807SJeff Garzik * 211c6fd2807SJeff Garzik * LOCKING: 212c6fd2807SJeff Garzik * caller. 213c6fd2807SJeff Garzik */ 214bd056d7eSTejun Heo static int ata_rwcmd_protocol(struct ata_taskfile *tf, struct ata_device *dev) 215c6fd2807SJeff Garzik { 216c6fd2807SJeff Garzik u8 cmd; 217c6fd2807SJeff Garzik 218c6fd2807SJeff Garzik int index, fua, lba48, write; 219c6fd2807SJeff Garzik 220c6fd2807SJeff Garzik fua = (tf->flags & ATA_TFLAG_FUA) ? 4 : 0; 221c6fd2807SJeff Garzik lba48 = (tf->flags & ATA_TFLAG_LBA48) ? 2 : 0; 222c6fd2807SJeff Garzik write = (tf->flags & ATA_TFLAG_WRITE) ? 1 : 0; 223c6fd2807SJeff Garzik 224c6fd2807SJeff Garzik if (dev->flags & ATA_DFLAG_PIO) { 225c6fd2807SJeff Garzik tf->protocol = ATA_PROT_PIO; 226c6fd2807SJeff Garzik index = dev->multi_count ? 0 : 8; 227bd056d7eSTejun Heo } else if (lba48 && (dev->ap->flags & ATA_FLAG_PIO_LBA48)) { 228c6fd2807SJeff Garzik /* Unable to use DMA due to host limitation */ 229c6fd2807SJeff Garzik tf->protocol = ATA_PROT_PIO; 230c6fd2807SJeff Garzik index = dev->multi_count ? 0 : 8; 231c6fd2807SJeff Garzik } else { 232c6fd2807SJeff Garzik tf->protocol = ATA_PROT_DMA; 233c6fd2807SJeff Garzik index = 16; 234c6fd2807SJeff Garzik } 235c6fd2807SJeff Garzik 236c6fd2807SJeff Garzik cmd = ata_rw_cmds[index + fua + lba48 + write]; 237c6fd2807SJeff Garzik if (cmd) { 238c6fd2807SJeff Garzik tf->command = cmd; 239c6fd2807SJeff Garzik return 0; 240c6fd2807SJeff Garzik } 241c6fd2807SJeff Garzik return -1; 242c6fd2807SJeff Garzik } 243c6fd2807SJeff Garzik 244c6fd2807SJeff Garzik /** 24535b649feSTejun Heo * ata_tf_read_block - Read block address from ATA taskfile 24635b649feSTejun Heo * @tf: ATA taskfile of interest 24735b649feSTejun Heo * @dev: ATA device @tf belongs to 24835b649feSTejun Heo * 24935b649feSTejun Heo * LOCKING: 25035b649feSTejun Heo * None. 25135b649feSTejun Heo * 25235b649feSTejun Heo * Read block address from @tf. This function can handle all 25335b649feSTejun Heo * three address formats - LBA, LBA48 and CHS. tf->protocol and 25435b649feSTejun Heo * flags select the address format to use. 25535b649feSTejun Heo * 25635b649feSTejun Heo * RETURNS: 25735b649feSTejun Heo * Block address read from @tf. 25835b649feSTejun Heo */ 25935b649feSTejun Heo u64 ata_tf_read_block(struct ata_taskfile *tf, struct ata_device *dev) 26035b649feSTejun Heo { 26135b649feSTejun Heo u64 block = 0; 26235b649feSTejun Heo 26335b649feSTejun Heo if (tf->flags & ATA_TFLAG_LBA) { 26435b649feSTejun Heo if (tf->flags & ATA_TFLAG_LBA48) { 26535b649feSTejun Heo block |= (u64)tf->hob_lbah << 40; 26635b649feSTejun Heo block |= (u64)tf->hob_lbam << 32; 26735b649feSTejun Heo block |= tf->hob_lbal << 24; 26835b649feSTejun Heo } else 26935b649feSTejun Heo block |= (tf->device & 0xf) << 24; 27035b649feSTejun Heo 27135b649feSTejun Heo block |= tf->lbah << 16; 27235b649feSTejun Heo block |= tf->lbam << 8; 27335b649feSTejun Heo block |= tf->lbal; 27435b649feSTejun Heo } else { 27535b649feSTejun Heo u32 cyl, head, sect; 27635b649feSTejun Heo 27735b649feSTejun Heo cyl = tf->lbam | (tf->lbah << 8); 27835b649feSTejun Heo head = tf->device & 0xf; 27935b649feSTejun Heo sect = tf->lbal; 28035b649feSTejun Heo 28135b649feSTejun Heo block = (cyl * dev->heads + head) * dev->sectors + sect; 28235b649feSTejun Heo } 28335b649feSTejun Heo 28435b649feSTejun Heo return block; 28535b649feSTejun Heo } 28635b649feSTejun Heo 28735b649feSTejun Heo /** 288bd056d7eSTejun Heo * ata_build_rw_tf - Build ATA taskfile for given read/write request 289bd056d7eSTejun Heo * @tf: Target ATA taskfile 290bd056d7eSTejun Heo * @dev: ATA device @tf belongs to 291bd056d7eSTejun Heo * @block: Block address 292bd056d7eSTejun Heo * @n_block: Number of blocks 293bd056d7eSTejun Heo * @tf_flags: RW/FUA etc... 294bd056d7eSTejun Heo * @tag: tag 295bd056d7eSTejun Heo * 296bd056d7eSTejun Heo * LOCKING: 297bd056d7eSTejun Heo * None. 298bd056d7eSTejun Heo * 299bd056d7eSTejun Heo * Build ATA taskfile @tf for read/write request described by 300bd056d7eSTejun Heo * @block, @n_block, @tf_flags and @tag on @dev. 301bd056d7eSTejun Heo * 302bd056d7eSTejun Heo * RETURNS: 303bd056d7eSTejun Heo * 304bd056d7eSTejun Heo * 0 on success, -ERANGE if the request is too large for @dev, 305bd056d7eSTejun Heo * -EINVAL if the request is invalid. 306bd056d7eSTejun Heo */ 307bd056d7eSTejun Heo int ata_build_rw_tf(struct ata_taskfile *tf, struct ata_device *dev, 308bd056d7eSTejun Heo u64 block, u32 n_block, unsigned int tf_flags, 309bd056d7eSTejun Heo unsigned int tag) 310bd056d7eSTejun Heo { 311bd056d7eSTejun Heo tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 312bd056d7eSTejun Heo tf->flags |= tf_flags; 313bd056d7eSTejun Heo 314bd056d7eSTejun Heo if ((dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ_OFF | 31570e6ad0cSTejun Heo ATA_DFLAG_NCQ)) == ATA_DFLAG_NCQ && 31670e6ad0cSTejun Heo likely(tag != ATA_TAG_INTERNAL)) { 317bd056d7eSTejun Heo /* yay, NCQ */ 318bd056d7eSTejun Heo if (!lba_48_ok(block, n_block)) 319bd056d7eSTejun Heo return -ERANGE; 320bd056d7eSTejun Heo 321bd056d7eSTejun Heo tf->protocol = ATA_PROT_NCQ; 322bd056d7eSTejun Heo tf->flags |= ATA_TFLAG_LBA | ATA_TFLAG_LBA48; 323bd056d7eSTejun Heo 324bd056d7eSTejun Heo if (tf->flags & ATA_TFLAG_WRITE) 325bd056d7eSTejun Heo tf->command = ATA_CMD_FPDMA_WRITE; 326bd056d7eSTejun Heo else 327bd056d7eSTejun Heo tf->command = ATA_CMD_FPDMA_READ; 328bd056d7eSTejun Heo 329bd056d7eSTejun Heo tf->nsect = tag << 3; 330bd056d7eSTejun Heo tf->hob_feature = (n_block >> 8) & 0xff; 331bd056d7eSTejun Heo tf->feature = n_block & 0xff; 332bd056d7eSTejun Heo 333bd056d7eSTejun Heo tf->hob_lbah = (block >> 40) & 0xff; 334bd056d7eSTejun Heo tf->hob_lbam = (block >> 32) & 0xff; 335bd056d7eSTejun Heo tf->hob_lbal = (block >> 24) & 0xff; 336bd056d7eSTejun Heo tf->lbah = (block >> 16) & 0xff; 337bd056d7eSTejun Heo tf->lbam = (block >> 8) & 0xff; 338bd056d7eSTejun Heo tf->lbal = block & 0xff; 339bd056d7eSTejun Heo 340bd056d7eSTejun Heo tf->device = 1 << 6; 341bd056d7eSTejun Heo if (tf->flags & ATA_TFLAG_FUA) 342bd056d7eSTejun Heo tf->device |= 1 << 7; 343bd056d7eSTejun Heo } else if (dev->flags & ATA_DFLAG_LBA) { 344bd056d7eSTejun Heo tf->flags |= ATA_TFLAG_LBA; 345bd056d7eSTejun Heo 346bd056d7eSTejun Heo if (lba_28_ok(block, n_block)) { 347bd056d7eSTejun Heo /* use LBA28 */ 348bd056d7eSTejun Heo tf->device |= (block >> 24) & 0xf; 349bd056d7eSTejun Heo } else if (lba_48_ok(block, n_block)) { 350bd056d7eSTejun Heo if (!(dev->flags & ATA_DFLAG_LBA48)) 351bd056d7eSTejun Heo return -ERANGE; 352bd056d7eSTejun Heo 353bd056d7eSTejun Heo /* use LBA48 */ 354bd056d7eSTejun Heo tf->flags |= ATA_TFLAG_LBA48; 355bd056d7eSTejun Heo 356bd056d7eSTejun Heo tf->hob_nsect = (n_block >> 8) & 0xff; 357bd056d7eSTejun Heo 358bd056d7eSTejun Heo tf->hob_lbah = (block >> 40) & 0xff; 359bd056d7eSTejun Heo tf->hob_lbam = (block >> 32) & 0xff; 360bd056d7eSTejun Heo tf->hob_lbal = (block >> 24) & 0xff; 361bd056d7eSTejun Heo } else 362bd056d7eSTejun Heo /* request too large even for LBA48 */ 363bd056d7eSTejun Heo return -ERANGE; 364bd056d7eSTejun Heo 365bd056d7eSTejun Heo if (unlikely(ata_rwcmd_protocol(tf, dev) < 0)) 366bd056d7eSTejun Heo return -EINVAL; 367bd056d7eSTejun Heo 368bd056d7eSTejun Heo tf->nsect = n_block & 0xff; 369bd056d7eSTejun Heo 370bd056d7eSTejun Heo tf->lbah = (block >> 16) & 0xff; 371bd056d7eSTejun Heo tf->lbam = (block >> 8) & 0xff; 372bd056d7eSTejun Heo tf->lbal = block & 0xff; 373bd056d7eSTejun Heo 374bd056d7eSTejun Heo tf->device |= ATA_LBA; 375bd056d7eSTejun Heo } else { 376bd056d7eSTejun Heo /* CHS */ 377bd056d7eSTejun Heo u32 sect, head, cyl, track; 378bd056d7eSTejun Heo 379bd056d7eSTejun Heo /* The request -may- be too large for CHS addressing. */ 380bd056d7eSTejun Heo if (!lba_28_ok(block, n_block)) 381bd056d7eSTejun Heo return -ERANGE; 382bd056d7eSTejun Heo 383bd056d7eSTejun Heo if (unlikely(ata_rwcmd_protocol(tf, dev) < 0)) 384bd056d7eSTejun Heo return -EINVAL; 385bd056d7eSTejun Heo 386bd056d7eSTejun Heo /* Convert LBA to CHS */ 387bd056d7eSTejun Heo track = (u32)block / dev->sectors; 388bd056d7eSTejun Heo cyl = track / dev->heads; 389bd056d7eSTejun Heo head = track % dev->heads; 390bd056d7eSTejun Heo sect = (u32)block % dev->sectors + 1; 391bd056d7eSTejun Heo 392bd056d7eSTejun Heo DPRINTK("block %u track %u cyl %u head %u sect %u\n", 393bd056d7eSTejun Heo (u32)block, track, cyl, head, sect); 394bd056d7eSTejun Heo 395bd056d7eSTejun Heo /* Check whether the converted CHS can fit. 396bd056d7eSTejun Heo Cylinder: 0-65535 397bd056d7eSTejun Heo Head: 0-15 398bd056d7eSTejun Heo Sector: 1-255*/ 399bd056d7eSTejun Heo if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect)) 400bd056d7eSTejun Heo return -ERANGE; 401bd056d7eSTejun Heo 402bd056d7eSTejun Heo tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */ 403bd056d7eSTejun Heo tf->lbal = sect; 404bd056d7eSTejun Heo tf->lbam = cyl; 405bd056d7eSTejun Heo tf->lbah = cyl >> 8; 406bd056d7eSTejun Heo tf->device |= head; 407bd056d7eSTejun Heo } 408bd056d7eSTejun Heo 409bd056d7eSTejun Heo return 0; 410bd056d7eSTejun Heo } 411bd056d7eSTejun Heo 412bd056d7eSTejun Heo /** 413c6fd2807SJeff Garzik * ata_pack_xfermask - Pack pio, mwdma and udma masks into xfer_mask 414c6fd2807SJeff Garzik * @pio_mask: pio_mask 415c6fd2807SJeff Garzik * @mwdma_mask: mwdma_mask 416c6fd2807SJeff Garzik * @udma_mask: udma_mask 417c6fd2807SJeff Garzik * 418c6fd2807SJeff Garzik * Pack @pio_mask, @mwdma_mask and @udma_mask into a single 419c6fd2807SJeff Garzik * unsigned int xfer_mask. 420c6fd2807SJeff Garzik * 421c6fd2807SJeff Garzik * LOCKING: 422c6fd2807SJeff Garzik * None. 423c6fd2807SJeff Garzik * 424c6fd2807SJeff Garzik * RETURNS: 425c6fd2807SJeff Garzik * Packed xfer_mask. 426c6fd2807SJeff Garzik */ 427c6fd2807SJeff Garzik static unsigned int ata_pack_xfermask(unsigned int pio_mask, 428c6fd2807SJeff Garzik unsigned int mwdma_mask, 429c6fd2807SJeff Garzik unsigned int udma_mask) 430c6fd2807SJeff Garzik { 431c6fd2807SJeff Garzik return ((pio_mask << ATA_SHIFT_PIO) & ATA_MASK_PIO) | 432c6fd2807SJeff Garzik ((mwdma_mask << ATA_SHIFT_MWDMA) & ATA_MASK_MWDMA) | 433c6fd2807SJeff Garzik ((udma_mask << ATA_SHIFT_UDMA) & ATA_MASK_UDMA); 434c6fd2807SJeff Garzik } 435c6fd2807SJeff Garzik 436c6fd2807SJeff Garzik /** 437c6fd2807SJeff Garzik * ata_unpack_xfermask - Unpack xfer_mask into pio, mwdma and udma masks 438c6fd2807SJeff Garzik * @xfer_mask: xfer_mask to unpack 439c6fd2807SJeff Garzik * @pio_mask: resulting pio_mask 440c6fd2807SJeff Garzik * @mwdma_mask: resulting mwdma_mask 441c6fd2807SJeff Garzik * @udma_mask: resulting udma_mask 442c6fd2807SJeff Garzik * 443c6fd2807SJeff Garzik * Unpack @xfer_mask into @pio_mask, @mwdma_mask and @udma_mask. 444c6fd2807SJeff Garzik * Any NULL distination masks will be ignored. 445c6fd2807SJeff Garzik */ 446c6fd2807SJeff Garzik static void ata_unpack_xfermask(unsigned int xfer_mask, 447c6fd2807SJeff Garzik unsigned int *pio_mask, 448c6fd2807SJeff Garzik unsigned int *mwdma_mask, 449c6fd2807SJeff Garzik unsigned int *udma_mask) 450c6fd2807SJeff Garzik { 451c6fd2807SJeff Garzik if (pio_mask) 452c6fd2807SJeff Garzik *pio_mask = (xfer_mask & ATA_MASK_PIO) >> ATA_SHIFT_PIO; 453c6fd2807SJeff Garzik if (mwdma_mask) 454c6fd2807SJeff Garzik *mwdma_mask = (xfer_mask & ATA_MASK_MWDMA) >> ATA_SHIFT_MWDMA; 455c6fd2807SJeff Garzik if (udma_mask) 456c6fd2807SJeff Garzik *udma_mask = (xfer_mask & ATA_MASK_UDMA) >> ATA_SHIFT_UDMA; 457c6fd2807SJeff Garzik } 458c6fd2807SJeff Garzik 459c6fd2807SJeff Garzik static const struct ata_xfer_ent { 460c6fd2807SJeff Garzik int shift, bits; 461c6fd2807SJeff Garzik u8 base; 462c6fd2807SJeff Garzik } ata_xfer_tbl[] = { 463c6fd2807SJeff Garzik { ATA_SHIFT_PIO, ATA_BITS_PIO, XFER_PIO_0 }, 464c6fd2807SJeff Garzik { ATA_SHIFT_MWDMA, ATA_BITS_MWDMA, XFER_MW_DMA_0 }, 465c6fd2807SJeff Garzik { ATA_SHIFT_UDMA, ATA_BITS_UDMA, XFER_UDMA_0 }, 466c6fd2807SJeff Garzik { -1, }, 467c6fd2807SJeff Garzik }; 468c6fd2807SJeff Garzik 469c6fd2807SJeff Garzik /** 470c6fd2807SJeff Garzik * ata_xfer_mask2mode - Find matching XFER_* for the given xfer_mask 471c6fd2807SJeff Garzik * @xfer_mask: xfer_mask of interest 472c6fd2807SJeff Garzik * 473c6fd2807SJeff Garzik * Return matching XFER_* value for @xfer_mask. Only the highest 474c6fd2807SJeff Garzik * bit of @xfer_mask is considered. 475c6fd2807SJeff Garzik * 476c6fd2807SJeff Garzik * LOCKING: 477c6fd2807SJeff Garzik * None. 478c6fd2807SJeff Garzik * 479c6fd2807SJeff Garzik * RETURNS: 480c6fd2807SJeff Garzik * Matching XFER_* value, 0 if no match found. 481c6fd2807SJeff Garzik */ 482c6fd2807SJeff Garzik static u8 ata_xfer_mask2mode(unsigned int xfer_mask) 483c6fd2807SJeff Garzik { 484c6fd2807SJeff Garzik int highbit = fls(xfer_mask) - 1; 485c6fd2807SJeff Garzik const struct ata_xfer_ent *ent; 486c6fd2807SJeff Garzik 487c6fd2807SJeff Garzik for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) 488c6fd2807SJeff Garzik if (highbit >= ent->shift && highbit < ent->shift + ent->bits) 489c6fd2807SJeff Garzik return ent->base + highbit - ent->shift; 490c6fd2807SJeff Garzik return 0; 491c6fd2807SJeff Garzik } 492c6fd2807SJeff Garzik 493c6fd2807SJeff Garzik /** 494c6fd2807SJeff Garzik * ata_xfer_mode2mask - Find matching xfer_mask for XFER_* 495c6fd2807SJeff Garzik * @xfer_mode: XFER_* of interest 496c6fd2807SJeff Garzik * 497c6fd2807SJeff Garzik * Return matching xfer_mask for @xfer_mode. 498c6fd2807SJeff Garzik * 499c6fd2807SJeff Garzik * LOCKING: 500c6fd2807SJeff Garzik * None. 501c6fd2807SJeff Garzik * 502c6fd2807SJeff Garzik * RETURNS: 503c6fd2807SJeff Garzik * Matching xfer_mask, 0 if no match found. 504c6fd2807SJeff Garzik */ 505c6fd2807SJeff Garzik static unsigned int ata_xfer_mode2mask(u8 xfer_mode) 506c6fd2807SJeff Garzik { 507c6fd2807SJeff Garzik const struct ata_xfer_ent *ent; 508c6fd2807SJeff Garzik 509c6fd2807SJeff Garzik for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) 510c6fd2807SJeff Garzik if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits) 511c6fd2807SJeff Garzik return 1 << (ent->shift + xfer_mode - ent->base); 512c6fd2807SJeff Garzik return 0; 513c6fd2807SJeff Garzik } 514c6fd2807SJeff Garzik 515c6fd2807SJeff Garzik /** 516c6fd2807SJeff Garzik * ata_xfer_mode2shift - Find matching xfer_shift for XFER_* 517c6fd2807SJeff Garzik * @xfer_mode: XFER_* of interest 518c6fd2807SJeff Garzik * 519c6fd2807SJeff Garzik * Return matching xfer_shift for @xfer_mode. 520c6fd2807SJeff Garzik * 521c6fd2807SJeff Garzik * LOCKING: 522c6fd2807SJeff Garzik * None. 523c6fd2807SJeff Garzik * 524c6fd2807SJeff Garzik * RETURNS: 525c6fd2807SJeff Garzik * Matching xfer_shift, -1 if no match found. 526c6fd2807SJeff Garzik */ 527c6fd2807SJeff Garzik static int ata_xfer_mode2shift(unsigned int xfer_mode) 528c6fd2807SJeff Garzik { 529c6fd2807SJeff Garzik const struct ata_xfer_ent *ent; 530c6fd2807SJeff Garzik 531c6fd2807SJeff Garzik for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) 532c6fd2807SJeff Garzik if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits) 533c6fd2807SJeff Garzik return ent->shift; 534c6fd2807SJeff Garzik return -1; 535c6fd2807SJeff Garzik } 536c6fd2807SJeff Garzik 537c6fd2807SJeff Garzik /** 538c6fd2807SJeff Garzik * ata_mode_string - convert xfer_mask to string 539c6fd2807SJeff Garzik * @xfer_mask: mask of bits supported; only highest bit counts. 540c6fd2807SJeff Garzik * 541c6fd2807SJeff Garzik * Determine string which represents the highest speed 542c6fd2807SJeff Garzik * (highest bit in @modemask). 543c6fd2807SJeff Garzik * 544c6fd2807SJeff Garzik * LOCKING: 545c6fd2807SJeff Garzik * None. 546c6fd2807SJeff Garzik * 547c6fd2807SJeff Garzik * RETURNS: 548c6fd2807SJeff Garzik * Constant C string representing highest speed listed in 549c6fd2807SJeff Garzik * @mode_mask, or the constant C string "<n/a>". 550c6fd2807SJeff Garzik */ 551c6fd2807SJeff Garzik static const char *ata_mode_string(unsigned int xfer_mask) 552c6fd2807SJeff Garzik { 553c6fd2807SJeff Garzik static const char * const xfer_mode_str[] = { 554c6fd2807SJeff Garzik "PIO0", 555c6fd2807SJeff Garzik "PIO1", 556c6fd2807SJeff Garzik "PIO2", 557c6fd2807SJeff Garzik "PIO3", 558c6fd2807SJeff Garzik "PIO4", 559b352e57dSAlan Cox "PIO5", 560b352e57dSAlan Cox "PIO6", 561c6fd2807SJeff Garzik "MWDMA0", 562c6fd2807SJeff Garzik "MWDMA1", 563c6fd2807SJeff Garzik "MWDMA2", 564b352e57dSAlan Cox "MWDMA3", 565b352e57dSAlan Cox "MWDMA4", 566c6fd2807SJeff Garzik "UDMA/16", 567c6fd2807SJeff Garzik "UDMA/25", 568c6fd2807SJeff Garzik "UDMA/33", 569c6fd2807SJeff Garzik "UDMA/44", 570c6fd2807SJeff Garzik "UDMA/66", 571c6fd2807SJeff Garzik "UDMA/100", 572c6fd2807SJeff Garzik "UDMA/133", 573c6fd2807SJeff Garzik "UDMA7", 574c6fd2807SJeff Garzik }; 575c6fd2807SJeff Garzik int highbit; 576c6fd2807SJeff Garzik 577c6fd2807SJeff Garzik highbit = fls(xfer_mask) - 1; 578c6fd2807SJeff Garzik if (highbit >= 0 && highbit < ARRAY_SIZE(xfer_mode_str)) 579c6fd2807SJeff Garzik return xfer_mode_str[highbit]; 580c6fd2807SJeff Garzik return "<n/a>"; 581c6fd2807SJeff Garzik } 582c6fd2807SJeff Garzik 583c6fd2807SJeff Garzik static const char *sata_spd_string(unsigned int spd) 584c6fd2807SJeff Garzik { 585c6fd2807SJeff Garzik static const char * const spd_str[] = { 586c6fd2807SJeff Garzik "1.5 Gbps", 587c6fd2807SJeff Garzik "3.0 Gbps", 588c6fd2807SJeff Garzik }; 589c6fd2807SJeff Garzik 590c6fd2807SJeff Garzik if (spd == 0 || (spd - 1) >= ARRAY_SIZE(spd_str)) 591c6fd2807SJeff Garzik return "<unknown>"; 592c6fd2807SJeff Garzik return spd_str[spd - 1]; 593c6fd2807SJeff Garzik } 594c6fd2807SJeff Garzik 595c6fd2807SJeff Garzik void ata_dev_disable(struct ata_device *dev) 596c6fd2807SJeff Garzik { 597c6fd2807SJeff Garzik if (ata_dev_enabled(dev) && ata_msg_drv(dev->ap)) { 598c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_WARNING, "disabled\n"); 599c6fd2807SJeff Garzik dev->class++; 600c6fd2807SJeff Garzik } 601c6fd2807SJeff Garzik } 602c6fd2807SJeff Garzik 603c6fd2807SJeff Garzik /** 604c6fd2807SJeff Garzik * ata_devchk - PATA device presence detection 605c6fd2807SJeff Garzik * @ap: ATA channel to examine 606c6fd2807SJeff Garzik * @device: Device to examine (starting at zero) 607c6fd2807SJeff Garzik * 6080d5ff566STejun Heo * This technique was originally described in 6090d5ff566STejun Heo * Hale Landis's ATADRVR (www.ata-atapi.com), and 6100d5ff566STejun Heo * later found its way into the ATA/ATAPI spec. 6110d5ff566STejun Heo * 6120d5ff566STejun Heo * Write a pattern to the ATA shadow registers, 6130d5ff566STejun Heo * and if a device is present, it will respond by 6140d5ff566STejun Heo * correctly storing and echoing back the 6150d5ff566STejun Heo * ATA shadow register contents. 616c6fd2807SJeff Garzik * 617c6fd2807SJeff Garzik * LOCKING: 618c6fd2807SJeff Garzik * caller. 619c6fd2807SJeff Garzik */ 620c6fd2807SJeff Garzik 6210d5ff566STejun Heo static unsigned int ata_devchk(struct ata_port *ap, unsigned int device) 622c6fd2807SJeff Garzik { 6230d5ff566STejun Heo struct ata_ioports *ioaddr = &ap->ioaddr; 6240d5ff566STejun Heo u8 nsect, lbal; 6250d5ff566STejun Heo 6260d5ff566STejun Heo ap->ops->dev_select(ap, device); 6270d5ff566STejun Heo 6280d5ff566STejun Heo iowrite8(0x55, ioaddr->nsect_addr); 6290d5ff566STejun Heo iowrite8(0xaa, ioaddr->lbal_addr); 6300d5ff566STejun Heo 6310d5ff566STejun Heo iowrite8(0xaa, ioaddr->nsect_addr); 6320d5ff566STejun Heo iowrite8(0x55, ioaddr->lbal_addr); 6330d5ff566STejun Heo 6340d5ff566STejun Heo iowrite8(0x55, ioaddr->nsect_addr); 6350d5ff566STejun Heo iowrite8(0xaa, ioaddr->lbal_addr); 6360d5ff566STejun Heo 6370d5ff566STejun Heo nsect = ioread8(ioaddr->nsect_addr); 6380d5ff566STejun Heo lbal = ioread8(ioaddr->lbal_addr); 6390d5ff566STejun Heo 6400d5ff566STejun Heo if ((nsect == 0x55) && (lbal == 0xaa)) 6410d5ff566STejun Heo return 1; /* we found a device */ 6420d5ff566STejun Heo 6430d5ff566STejun Heo return 0; /* nothing found */ 644c6fd2807SJeff Garzik } 645c6fd2807SJeff Garzik 646c6fd2807SJeff Garzik /** 647c6fd2807SJeff Garzik * ata_dev_classify - determine device type based on ATA-spec signature 648c6fd2807SJeff Garzik * @tf: ATA taskfile register set for device to be identified 649c6fd2807SJeff Garzik * 650c6fd2807SJeff Garzik * Determine from taskfile register contents whether a device is 651c6fd2807SJeff Garzik * ATA or ATAPI, as per "Signature and persistence" section 652c6fd2807SJeff Garzik * of ATA/PI spec (volume 1, sect 5.14). 653c6fd2807SJeff Garzik * 654c6fd2807SJeff Garzik * LOCKING: 655c6fd2807SJeff Garzik * None. 656c6fd2807SJeff Garzik * 657c6fd2807SJeff Garzik * RETURNS: 658c6fd2807SJeff Garzik * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, or %ATA_DEV_UNKNOWN 659c6fd2807SJeff Garzik * the event of failure. 660c6fd2807SJeff Garzik */ 661c6fd2807SJeff Garzik 662c6fd2807SJeff Garzik unsigned int ata_dev_classify(const struct ata_taskfile *tf) 663c6fd2807SJeff Garzik { 664c6fd2807SJeff Garzik /* Apple's open source Darwin code hints that some devices only 665c6fd2807SJeff Garzik * put a proper signature into the LBA mid/high registers, 666c6fd2807SJeff Garzik * So, we only check those. It's sufficient for uniqueness. 667c6fd2807SJeff Garzik */ 668c6fd2807SJeff Garzik 669c6fd2807SJeff Garzik if (((tf->lbam == 0) && (tf->lbah == 0)) || 670c6fd2807SJeff Garzik ((tf->lbam == 0x3c) && (tf->lbah == 0xc3))) { 671c6fd2807SJeff Garzik DPRINTK("found ATA device by sig\n"); 672c6fd2807SJeff Garzik return ATA_DEV_ATA; 673c6fd2807SJeff Garzik } 674c6fd2807SJeff Garzik 675c6fd2807SJeff Garzik if (((tf->lbam == 0x14) && (tf->lbah == 0xeb)) || 676c6fd2807SJeff Garzik ((tf->lbam == 0x69) && (tf->lbah == 0x96))) { 677c6fd2807SJeff Garzik DPRINTK("found ATAPI device by sig\n"); 678c6fd2807SJeff Garzik return ATA_DEV_ATAPI; 679c6fd2807SJeff Garzik } 680c6fd2807SJeff Garzik 681c6fd2807SJeff Garzik DPRINTK("unknown device\n"); 682c6fd2807SJeff Garzik return ATA_DEV_UNKNOWN; 683c6fd2807SJeff Garzik } 684c6fd2807SJeff Garzik 685c6fd2807SJeff Garzik /** 686c6fd2807SJeff Garzik * ata_dev_try_classify - Parse returned ATA device signature 687c6fd2807SJeff Garzik * @ap: ATA channel to examine 688c6fd2807SJeff Garzik * @device: Device to examine (starting at zero) 689c6fd2807SJeff Garzik * @r_err: Value of error register on completion 690c6fd2807SJeff Garzik * 691c6fd2807SJeff Garzik * After an event -- SRST, E.D.D., or SATA COMRESET -- occurs, 692c6fd2807SJeff Garzik * an ATA/ATAPI-defined set of values is placed in the ATA 693c6fd2807SJeff Garzik * shadow registers, indicating the results of device detection 694c6fd2807SJeff Garzik * and diagnostics. 695c6fd2807SJeff Garzik * 696c6fd2807SJeff Garzik * Select the ATA device, and read the values from the ATA shadow 697c6fd2807SJeff Garzik * registers. Then parse according to the Error register value, 698c6fd2807SJeff Garzik * and the spec-defined values examined by ata_dev_classify(). 699c6fd2807SJeff Garzik * 700c6fd2807SJeff Garzik * LOCKING: 701c6fd2807SJeff Garzik * caller. 702c6fd2807SJeff Garzik * 703c6fd2807SJeff Garzik * RETURNS: 704c6fd2807SJeff Garzik * Device type - %ATA_DEV_ATA, %ATA_DEV_ATAPI or %ATA_DEV_NONE. 705c6fd2807SJeff Garzik */ 706c6fd2807SJeff Garzik 707c6fd2807SJeff Garzik static unsigned int 708c6fd2807SJeff Garzik ata_dev_try_classify(struct ata_port *ap, unsigned int device, u8 *r_err) 709c6fd2807SJeff Garzik { 710c6fd2807SJeff Garzik struct ata_taskfile tf; 711c6fd2807SJeff Garzik unsigned int class; 712c6fd2807SJeff Garzik u8 err; 713c6fd2807SJeff Garzik 714c6fd2807SJeff Garzik ap->ops->dev_select(ap, device); 715c6fd2807SJeff Garzik 716c6fd2807SJeff Garzik memset(&tf, 0, sizeof(tf)); 717c6fd2807SJeff Garzik 718c6fd2807SJeff Garzik ap->ops->tf_read(ap, &tf); 719c6fd2807SJeff Garzik err = tf.feature; 720c6fd2807SJeff Garzik if (r_err) 721c6fd2807SJeff Garzik *r_err = err; 722c6fd2807SJeff Garzik 72393590859SAlan Cox /* see if device passed diags: if master then continue and warn later */ 72493590859SAlan Cox if (err == 0 && device == 0) 72593590859SAlan Cox /* diagnostic fail : do nothing _YET_ */ 72693590859SAlan Cox ap->device[device].horkage |= ATA_HORKAGE_DIAGNOSTIC; 72793590859SAlan Cox else if (err == 1) 728c6fd2807SJeff Garzik /* do nothing */ ; 729c6fd2807SJeff Garzik else if ((device == 0) && (err == 0x81)) 730c6fd2807SJeff Garzik /* do nothing */ ; 731c6fd2807SJeff Garzik else 732c6fd2807SJeff Garzik return ATA_DEV_NONE; 733c6fd2807SJeff Garzik 734c6fd2807SJeff Garzik /* determine if device is ATA or ATAPI */ 735c6fd2807SJeff Garzik class = ata_dev_classify(&tf); 736c6fd2807SJeff Garzik 737c6fd2807SJeff Garzik if (class == ATA_DEV_UNKNOWN) 738c6fd2807SJeff Garzik return ATA_DEV_NONE; 739c6fd2807SJeff Garzik if ((class == ATA_DEV_ATA) && (ata_chk_status(ap) == 0)) 740c6fd2807SJeff Garzik return ATA_DEV_NONE; 741c6fd2807SJeff Garzik return class; 742c6fd2807SJeff Garzik } 743c6fd2807SJeff Garzik 744c6fd2807SJeff Garzik /** 745c6fd2807SJeff Garzik * ata_id_string - Convert IDENTIFY DEVICE page into string 746c6fd2807SJeff Garzik * @id: IDENTIFY DEVICE results we will examine 747c6fd2807SJeff Garzik * @s: string into which data is output 748c6fd2807SJeff Garzik * @ofs: offset into identify device page 749c6fd2807SJeff Garzik * @len: length of string to return. must be an even number. 750c6fd2807SJeff Garzik * 751c6fd2807SJeff Garzik * The strings in the IDENTIFY DEVICE page are broken up into 752c6fd2807SJeff Garzik * 16-bit chunks. Run through the string, and output each 753c6fd2807SJeff Garzik * 8-bit chunk linearly, regardless of platform. 754c6fd2807SJeff Garzik * 755c6fd2807SJeff Garzik * LOCKING: 756c6fd2807SJeff Garzik * caller. 757c6fd2807SJeff Garzik */ 758c6fd2807SJeff Garzik 759c6fd2807SJeff Garzik void ata_id_string(const u16 *id, unsigned char *s, 760c6fd2807SJeff Garzik unsigned int ofs, unsigned int len) 761c6fd2807SJeff Garzik { 762c6fd2807SJeff Garzik unsigned int c; 763c6fd2807SJeff Garzik 764c6fd2807SJeff Garzik while (len > 0) { 765c6fd2807SJeff Garzik c = id[ofs] >> 8; 766c6fd2807SJeff Garzik *s = c; 767c6fd2807SJeff Garzik s++; 768c6fd2807SJeff Garzik 769c6fd2807SJeff Garzik c = id[ofs] & 0xff; 770c6fd2807SJeff Garzik *s = c; 771c6fd2807SJeff Garzik s++; 772c6fd2807SJeff Garzik 773c6fd2807SJeff Garzik ofs++; 774c6fd2807SJeff Garzik len -= 2; 775c6fd2807SJeff Garzik } 776c6fd2807SJeff Garzik } 777c6fd2807SJeff Garzik 778c6fd2807SJeff Garzik /** 779c6fd2807SJeff Garzik * ata_id_c_string - Convert IDENTIFY DEVICE page into C string 780c6fd2807SJeff Garzik * @id: IDENTIFY DEVICE results we will examine 781c6fd2807SJeff Garzik * @s: string into which data is output 782c6fd2807SJeff Garzik * @ofs: offset into identify device page 783c6fd2807SJeff Garzik * @len: length of string to return. must be an odd number. 784c6fd2807SJeff Garzik * 785c6fd2807SJeff Garzik * This function is identical to ata_id_string except that it 786c6fd2807SJeff Garzik * trims trailing spaces and terminates the resulting string with 787c6fd2807SJeff Garzik * null. @len must be actual maximum length (even number) + 1. 788c6fd2807SJeff Garzik * 789c6fd2807SJeff Garzik * LOCKING: 790c6fd2807SJeff Garzik * caller. 791c6fd2807SJeff Garzik */ 792c6fd2807SJeff Garzik void ata_id_c_string(const u16 *id, unsigned char *s, 793c6fd2807SJeff Garzik unsigned int ofs, unsigned int len) 794c6fd2807SJeff Garzik { 795c6fd2807SJeff Garzik unsigned char *p; 796c6fd2807SJeff Garzik 797c6fd2807SJeff Garzik WARN_ON(!(len & 1)); 798c6fd2807SJeff Garzik 799c6fd2807SJeff Garzik ata_id_string(id, s, ofs, len - 1); 800c6fd2807SJeff Garzik 801c6fd2807SJeff Garzik p = s + strnlen(s, len - 1); 802c6fd2807SJeff Garzik while (p > s && p[-1] == ' ') 803c6fd2807SJeff Garzik p--; 804c6fd2807SJeff Garzik *p = '\0'; 805c6fd2807SJeff Garzik } 806c6fd2807SJeff Garzik 807c6fd2807SJeff Garzik static u64 ata_id_n_sectors(const u16 *id) 808c6fd2807SJeff Garzik { 809c6fd2807SJeff Garzik if (ata_id_has_lba(id)) { 810c6fd2807SJeff Garzik if (ata_id_has_lba48(id)) 811c6fd2807SJeff Garzik return ata_id_u64(id, 100); 812c6fd2807SJeff Garzik else 813c6fd2807SJeff Garzik return ata_id_u32(id, 60); 814c6fd2807SJeff Garzik } else { 815c6fd2807SJeff Garzik if (ata_id_current_chs_valid(id)) 816c6fd2807SJeff Garzik return ata_id_u32(id, 57); 817c6fd2807SJeff Garzik else 818c6fd2807SJeff Garzik return id[1] * id[3] * id[6]; 819c6fd2807SJeff Garzik } 820c6fd2807SJeff Garzik } 821c6fd2807SJeff Garzik 822c6fd2807SJeff Garzik /** 823c6fd2807SJeff Garzik * ata_noop_dev_select - Select device 0/1 on ATA bus 824c6fd2807SJeff Garzik * @ap: ATA channel to manipulate 825c6fd2807SJeff Garzik * @device: ATA device (numbered from zero) to select 826c6fd2807SJeff Garzik * 827c6fd2807SJeff Garzik * This function performs no actual function. 828c6fd2807SJeff Garzik * 829c6fd2807SJeff Garzik * May be used as the dev_select() entry in ata_port_operations. 830c6fd2807SJeff Garzik * 831c6fd2807SJeff Garzik * LOCKING: 832c6fd2807SJeff Garzik * caller. 833c6fd2807SJeff Garzik */ 834c6fd2807SJeff Garzik void ata_noop_dev_select (struct ata_port *ap, unsigned int device) 835c6fd2807SJeff Garzik { 836c6fd2807SJeff Garzik } 837c6fd2807SJeff Garzik 838c6fd2807SJeff Garzik 839c6fd2807SJeff Garzik /** 840c6fd2807SJeff Garzik * ata_std_dev_select - Select device 0/1 on ATA bus 841c6fd2807SJeff Garzik * @ap: ATA channel to manipulate 842c6fd2807SJeff Garzik * @device: ATA device (numbered from zero) to select 843c6fd2807SJeff Garzik * 844c6fd2807SJeff Garzik * Use the method defined in the ATA specification to 845c6fd2807SJeff Garzik * make either device 0, or device 1, active on the 846c6fd2807SJeff Garzik * ATA channel. Works with both PIO and MMIO. 847c6fd2807SJeff Garzik * 848c6fd2807SJeff Garzik * May be used as the dev_select() entry in ata_port_operations. 849c6fd2807SJeff Garzik * 850c6fd2807SJeff Garzik * LOCKING: 851c6fd2807SJeff Garzik * caller. 852c6fd2807SJeff Garzik */ 853c6fd2807SJeff Garzik 854c6fd2807SJeff Garzik void ata_std_dev_select (struct ata_port *ap, unsigned int device) 855c6fd2807SJeff Garzik { 856c6fd2807SJeff Garzik u8 tmp; 857c6fd2807SJeff Garzik 858c6fd2807SJeff Garzik if (device == 0) 859c6fd2807SJeff Garzik tmp = ATA_DEVICE_OBS; 860c6fd2807SJeff Garzik else 861c6fd2807SJeff Garzik tmp = ATA_DEVICE_OBS | ATA_DEV1; 862c6fd2807SJeff Garzik 8630d5ff566STejun Heo iowrite8(tmp, ap->ioaddr.device_addr); 864c6fd2807SJeff Garzik ata_pause(ap); /* needed; also flushes, for mmio */ 865c6fd2807SJeff Garzik } 866c6fd2807SJeff Garzik 867c6fd2807SJeff Garzik /** 868c6fd2807SJeff Garzik * ata_dev_select - Select device 0/1 on ATA bus 869c6fd2807SJeff Garzik * @ap: ATA channel to manipulate 870c6fd2807SJeff Garzik * @device: ATA device (numbered from zero) to select 871c6fd2807SJeff Garzik * @wait: non-zero to wait for Status register BSY bit to clear 872c6fd2807SJeff Garzik * @can_sleep: non-zero if context allows sleeping 873c6fd2807SJeff Garzik * 874c6fd2807SJeff Garzik * Use the method defined in the ATA specification to 875c6fd2807SJeff Garzik * make either device 0, or device 1, active on the 876c6fd2807SJeff Garzik * ATA channel. 877c6fd2807SJeff Garzik * 878c6fd2807SJeff Garzik * This is a high-level version of ata_std_dev_select(), 879c6fd2807SJeff Garzik * which additionally provides the services of inserting 880c6fd2807SJeff Garzik * the proper pauses and status polling, where needed. 881c6fd2807SJeff Garzik * 882c6fd2807SJeff Garzik * LOCKING: 883c6fd2807SJeff Garzik * caller. 884c6fd2807SJeff Garzik */ 885c6fd2807SJeff Garzik 886c6fd2807SJeff Garzik void ata_dev_select(struct ata_port *ap, unsigned int device, 887c6fd2807SJeff Garzik unsigned int wait, unsigned int can_sleep) 888c6fd2807SJeff Garzik { 889c6fd2807SJeff Garzik if (ata_msg_probe(ap)) 890c6fd2807SJeff Garzik ata_port_printk(ap, KERN_INFO, "ata_dev_select: ENTER, ata%u: " 891c6fd2807SJeff Garzik "device %u, wait %u\n", ap->id, device, wait); 892c6fd2807SJeff Garzik 893c6fd2807SJeff Garzik if (wait) 894c6fd2807SJeff Garzik ata_wait_idle(ap); 895c6fd2807SJeff Garzik 896c6fd2807SJeff Garzik ap->ops->dev_select(ap, device); 897c6fd2807SJeff Garzik 898c6fd2807SJeff Garzik if (wait) { 899c6fd2807SJeff Garzik if (can_sleep && ap->device[device].class == ATA_DEV_ATAPI) 900c6fd2807SJeff Garzik msleep(150); 901c6fd2807SJeff Garzik ata_wait_idle(ap); 902c6fd2807SJeff Garzik } 903c6fd2807SJeff Garzik } 904c6fd2807SJeff Garzik 905c6fd2807SJeff Garzik /** 906c6fd2807SJeff Garzik * ata_dump_id - IDENTIFY DEVICE info debugging output 907c6fd2807SJeff Garzik * @id: IDENTIFY DEVICE page to dump 908c6fd2807SJeff Garzik * 909c6fd2807SJeff Garzik * Dump selected 16-bit words from the given IDENTIFY DEVICE 910c6fd2807SJeff Garzik * page. 911c6fd2807SJeff Garzik * 912c6fd2807SJeff Garzik * LOCKING: 913c6fd2807SJeff Garzik * caller. 914c6fd2807SJeff Garzik */ 915c6fd2807SJeff Garzik 916c6fd2807SJeff Garzik static inline void ata_dump_id(const u16 *id) 917c6fd2807SJeff Garzik { 918c6fd2807SJeff Garzik DPRINTK("49==0x%04x " 919c6fd2807SJeff Garzik "53==0x%04x " 920c6fd2807SJeff Garzik "63==0x%04x " 921c6fd2807SJeff Garzik "64==0x%04x " 922c6fd2807SJeff Garzik "75==0x%04x \n", 923c6fd2807SJeff Garzik id[49], 924c6fd2807SJeff Garzik id[53], 925c6fd2807SJeff Garzik id[63], 926c6fd2807SJeff Garzik id[64], 927c6fd2807SJeff Garzik id[75]); 928c6fd2807SJeff Garzik DPRINTK("80==0x%04x " 929c6fd2807SJeff Garzik "81==0x%04x " 930c6fd2807SJeff Garzik "82==0x%04x " 931c6fd2807SJeff Garzik "83==0x%04x " 932c6fd2807SJeff Garzik "84==0x%04x \n", 933c6fd2807SJeff Garzik id[80], 934c6fd2807SJeff Garzik id[81], 935c6fd2807SJeff Garzik id[82], 936c6fd2807SJeff Garzik id[83], 937c6fd2807SJeff Garzik id[84]); 938c6fd2807SJeff Garzik DPRINTK("88==0x%04x " 939c6fd2807SJeff Garzik "93==0x%04x\n", 940c6fd2807SJeff Garzik id[88], 941c6fd2807SJeff Garzik id[93]); 942c6fd2807SJeff Garzik } 943c6fd2807SJeff Garzik 944c6fd2807SJeff Garzik /** 945c6fd2807SJeff Garzik * ata_id_xfermask - Compute xfermask from the given IDENTIFY data 946c6fd2807SJeff Garzik * @id: IDENTIFY data to compute xfer mask from 947c6fd2807SJeff Garzik * 948c6fd2807SJeff Garzik * Compute the xfermask for this device. This is not as trivial 949c6fd2807SJeff Garzik * as it seems if we must consider early devices correctly. 950c6fd2807SJeff Garzik * 951c6fd2807SJeff Garzik * FIXME: pre IDE drive timing (do we care ?). 952c6fd2807SJeff Garzik * 953c6fd2807SJeff Garzik * LOCKING: 954c6fd2807SJeff Garzik * None. 955c6fd2807SJeff Garzik * 956c6fd2807SJeff Garzik * RETURNS: 957c6fd2807SJeff Garzik * Computed xfermask 958c6fd2807SJeff Garzik */ 959c6fd2807SJeff Garzik static unsigned int ata_id_xfermask(const u16 *id) 960c6fd2807SJeff Garzik { 961c6fd2807SJeff Garzik unsigned int pio_mask, mwdma_mask, udma_mask; 962c6fd2807SJeff Garzik 963c6fd2807SJeff Garzik /* Usual case. Word 53 indicates word 64 is valid */ 964c6fd2807SJeff Garzik if (id[ATA_ID_FIELD_VALID] & (1 << 1)) { 965c6fd2807SJeff Garzik pio_mask = id[ATA_ID_PIO_MODES] & 0x03; 966c6fd2807SJeff Garzik pio_mask <<= 3; 967c6fd2807SJeff Garzik pio_mask |= 0x7; 968c6fd2807SJeff Garzik } else { 969c6fd2807SJeff Garzik /* If word 64 isn't valid then Word 51 high byte holds 970c6fd2807SJeff Garzik * the PIO timing number for the maximum. Turn it into 971c6fd2807SJeff Garzik * a mask. 972c6fd2807SJeff Garzik */ 9737a0f1c8aSLennert Buytenhek u8 mode = (id[ATA_ID_OLD_PIO_MODES] >> 8) & 0xFF; 97446767aebSAlan Cox if (mode < 5) /* Valid PIO range */ 97546767aebSAlan Cox pio_mask = (2 << mode) - 1; 97646767aebSAlan Cox else 97746767aebSAlan Cox pio_mask = 1; 978c6fd2807SJeff Garzik 979c6fd2807SJeff Garzik /* But wait.. there's more. Design your standards by 980c6fd2807SJeff Garzik * committee and you too can get a free iordy field to 981c6fd2807SJeff Garzik * process. However its the speeds not the modes that 982c6fd2807SJeff Garzik * are supported... Note drivers using the timing API 983c6fd2807SJeff Garzik * will get this right anyway 984c6fd2807SJeff Garzik */ 985c6fd2807SJeff Garzik } 986c6fd2807SJeff Garzik 987c6fd2807SJeff Garzik mwdma_mask = id[ATA_ID_MWDMA_MODES] & 0x07; 988c6fd2807SJeff Garzik 989b352e57dSAlan Cox if (ata_id_is_cfa(id)) { 990b352e57dSAlan Cox /* 991b352e57dSAlan Cox * Process compact flash extended modes 992b352e57dSAlan Cox */ 993b352e57dSAlan Cox int pio = id[163] & 0x7; 994b352e57dSAlan Cox int dma = (id[163] >> 3) & 7; 995b352e57dSAlan Cox 996b352e57dSAlan Cox if (pio) 997b352e57dSAlan Cox pio_mask |= (1 << 5); 998b352e57dSAlan Cox if (pio > 1) 999b352e57dSAlan Cox pio_mask |= (1 << 6); 1000b352e57dSAlan Cox if (dma) 1001b352e57dSAlan Cox mwdma_mask |= (1 << 3); 1002b352e57dSAlan Cox if (dma > 1) 1003b352e57dSAlan Cox mwdma_mask |= (1 << 4); 1004b352e57dSAlan Cox } 1005b352e57dSAlan Cox 1006c6fd2807SJeff Garzik udma_mask = 0; 1007c6fd2807SJeff Garzik if (id[ATA_ID_FIELD_VALID] & (1 << 2)) 1008c6fd2807SJeff Garzik udma_mask = id[ATA_ID_UDMA_MODES] & 0xff; 1009c6fd2807SJeff Garzik 1010c6fd2807SJeff Garzik return ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask); 1011c6fd2807SJeff Garzik } 1012c6fd2807SJeff Garzik 1013c6fd2807SJeff Garzik /** 1014c6fd2807SJeff Garzik * ata_port_queue_task - Queue port_task 1015c6fd2807SJeff Garzik * @ap: The ata_port to queue port_task for 1016c6fd2807SJeff Garzik * @fn: workqueue function to be scheduled 101765f27f38SDavid Howells * @data: data for @fn to use 1018c6fd2807SJeff Garzik * @delay: delay time for workqueue function 1019c6fd2807SJeff Garzik * 1020c6fd2807SJeff Garzik * Schedule @fn(@data) for execution after @delay jiffies using 1021c6fd2807SJeff Garzik * port_task. There is one port_task per port and it's the 1022c6fd2807SJeff Garzik * user(low level driver)'s responsibility to make sure that only 1023c6fd2807SJeff Garzik * one task is active at any given time. 1024c6fd2807SJeff Garzik * 1025c6fd2807SJeff Garzik * libata core layer takes care of synchronization between 1026c6fd2807SJeff Garzik * port_task and EH. ata_port_queue_task() may be ignored for EH 1027c6fd2807SJeff Garzik * synchronization. 1028c6fd2807SJeff Garzik * 1029c6fd2807SJeff Garzik * LOCKING: 1030c6fd2807SJeff Garzik * Inherited from caller. 1031c6fd2807SJeff Garzik */ 103265f27f38SDavid Howells void ata_port_queue_task(struct ata_port *ap, work_func_t fn, void *data, 1033c6fd2807SJeff Garzik unsigned long delay) 1034c6fd2807SJeff Garzik { 1035c6fd2807SJeff Garzik int rc; 1036c6fd2807SJeff Garzik 1037c6fd2807SJeff Garzik if (ap->pflags & ATA_PFLAG_FLUSH_PORT_TASK) 1038c6fd2807SJeff Garzik return; 1039c6fd2807SJeff Garzik 104065f27f38SDavid Howells PREPARE_DELAYED_WORK(&ap->port_task, fn); 104165f27f38SDavid Howells ap->port_task_data = data; 1042c6fd2807SJeff Garzik 1043c6fd2807SJeff Garzik rc = queue_delayed_work(ata_wq, &ap->port_task, delay); 1044c6fd2807SJeff Garzik 1045c6fd2807SJeff Garzik /* rc == 0 means that another user is using port task */ 1046c6fd2807SJeff Garzik WARN_ON(rc == 0); 1047c6fd2807SJeff Garzik } 1048c6fd2807SJeff Garzik 1049c6fd2807SJeff Garzik /** 1050c6fd2807SJeff Garzik * ata_port_flush_task - Flush port_task 1051c6fd2807SJeff Garzik * @ap: The ata_port to flush port_task for 1052c6fd2807SJeff Garzik * 1053c6fd2807SJeff Garzik * After this function completes, port_task is guranteed not to 1054c6fd2807SJeff Garzik * be running or scheduled. 1055c6fd2807SJeff Garzik * 1056c6fd2807SJeff Garzik * LOCKING: 1057c6fd2807SJeff Garzik * Kernel thread context (may sleep) 1058c6fd2807SJeff Garzik */ 1059c6fd2807SJeff Garzik void ata_port_flush_task(struct ata_port *ap) 1060c6fd2807SJeff Garzik { 1061c6fd2807SJeff Garzik unsigned long flags; 1062c6fd2807SJeff Garzik 1063c6fd2807SJeff Garzik DPRINTK("ENTER\n"); 1064c6fd2807SJeff Garzik 1065c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 1066c6fd2807SJeff Garzik ap->pflags |= ATA_PFLAG_FLUSH_PORT_TASK; 1067c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 1068c6fd2807SJeff Garzik 1069c6fd2807SJeff Garzik DPRINTK("flush #1\n"); 1070c6fd2807SJeff Garzik flush_workqueue(ata_wq); 1071c6fd2807SJeff Garzik 1072c6fd2807SJeff Garzik /* 1073c6fd2807SJeff Garzik * At this point, if a task is running, it's guaranteed to see 1074c6fd2807SJeff Garzik * the FLUSH flag; thus, it will never queue pio tasks again. 1075c6fd2807SJeff Garzik * Cancel and flush. 1076c6fd2807SJeff Garzik */ 1077c6fd2807SJeff Garzik if (!cancel_delayed_work(&ap->port_task)) { 1078c6fd2807SJeff Garzik if (ata_msg_ctl(ap)) 1079c6fd2807SJeff Garzik ata_port_printk(ap, KERN_DEBUG, "%s: flush #2\n", 1080c6fd2807SJeff Garzik __FUNCTION__); 1081c6fd2807SJeff Garzik flush_workqueue(ata_wq); 1082c6fd2807SJeff Garzik } 1083c6fd2807SJeff Garzik 1084c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 1085c6fd2807SJeff Garzik ap->pflags &= ~ATA_PFLAG_FLUSH_PORT_TASK; 1086c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 1087c6fd2807SJeff Garzik 1088c6fd2807SJeff Garzik if (ata_msg_ctl(ap)) 1089c6fd2807SJeff Garzik ata_port_printk(ap, KERN_DEBUG, "%s: EXIT\n", __FUNCTION__); 1090c6fd2807SJeff Garzik } 1091c6fd2807SJeff Garzik 10927102d230SAdrian Bunk static void ata_qc_complete_internal(struct ata_queued_cmd *qc) 1093c6fd2807SJeff Garzik { 1094c6fd2807SJeff Garzik struct completion *waiting = qc->private_data; 1095c6fd2807SJeff Garzik 1096c6fd2807SJeff Garzik complete(waiting); 1097c6fd2807SJeff Garzik } 1098c6fd2807SJeff Garzik 1099c6fd2807SJeff Garzik /** 11002432697bSTejun Heo * ata_exec_internal_sg - execute libata internal command 1101c6fd2807SJeff Garzik * @dev: Device to which the command is sent 1102c6fd2807SJeff Garzik * @tf: Taskfile registers for the command and the result 1103c6fd2807SJeff Garzik * @cdb: CDB for packet command 1104c6fd2807SJeff Garzik * @dma_dir: Data tranfer direction of the command 11052432697bSTejun Heo * @sg: sg list for the data buffer of the command 11062432697bSTejun Heo * @n_elem: Number of sg entries 1107c6fd2807SJeff Garzik * 1108c6fd2807SJeff Garzik * Executes libata internal command with timeout. @tf contains 1109c6fd2807SJeff Garzik * command on entry and result on return. Timeout and error 1110c6fd2807SJeff Garzik * conditions are reported via return value. No recovery action 1111c6fd2807SJeff Garzik * is taken after a command times out. It's caller's duty to 1112c6fd2807SJeff Garzik * clean up after timeout. 1113c6fd2807SJeff Garzik * 1114c6fd2807SJeff Garzik * LOCKING: 1115c6fd2807SJeff Garzik * None. Should be called with kernel context, might sleep. 1116c6fd2807SJeff Garzik * 1117c6fd2807SJeff Garzik * RETURNS: 1118c6fd2807SJeff Garzik * Zero on success, AC_ERR_* mask on failure 1119c6fd2807SJeff Garzik */ 11202432697bSTejun Heo unsigned ata_exec_internal_sg(struct ata_device *dev, 1121c6fd2807SJeff Garzik struct ata_taskfile *tf, const u8 *cdb, 11222432697bSTejun Heo int dma_dir, struct scatterlist *sg, 11232432697bSTejun Heo unsigned int n_elem) 1124c6fd2807SJeff Garzik { 1125c6fd2807SJeff Garzik struct ata_port *ap = dev->ap; 1126c6fd2807SJeff Garzik u8 command = tf->command; 1127c6fd2807SJeff Garzik struct ata_queued_cmd *qc; 1128c6fd2807SJeff Garzik unsigned int tag, preempted_tag; 1129c6fd2807SJeff Garzik u32 preempted_sactive, preempted_qc_active; 1130c6fd2807SJeff Garzik DECLARE_COMPLETION_ONSTACK(wait); 1131c6fd2807SJeff Garzik unsigned long flags; 1132c6fd2807SJeff Garzik unsigned int err_mask; 1133c6fd2807SJeff Garzik int rc; 1134c6fd2807SJeff Garzik 1135c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 1136c6fd2807SJeff Garzik 1137c6fd2807SJeff Garzik /* no internal command while frozen */ 1138c6fd2807SJeff Garzik if (ap->pflags & ATA_PFLAG_FROZEN) { 1139c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 1140c6fd2807SJeff Garzik return AC_ERR_SYSTEM; 1141c6fd2807SJeff Garzik } 1142c6fd2807SJeff Garzik 1143c6fd2807SJeff Garzik /* initialize internal qc */ 1144c6fd2807SJeff Garzik 1145c6fd2807SJeff Garzik /* XXX: Tag 0 is used for drivers with legacy EH as some 1146c6fd2807SJeff Garzik * drivers choke if any other tag is given. This breaks 1147c6fd2807SJeff Garzik * ata_tag_internal() test for those drivers. Don't use new 1148c6fd2807SJeff Garzik * EH stuff without converting to it. 1149c6fd2807SJeff Garzik */ 1150c6fd2807SJeff Garzik if (ap->ops->error_handler) 1151c6fd2807SJeff Garzik tag = ATA_TAG_INTERNAL; 1152c6fd2807SJeff Garzik else 1153c6fd2807SJeff Garzik tag = 0; 1154c6fd2807SJeff Garzik 1155c6fd2807SJeff Garzik if (test_and_set_bit(tag, &ap->qc_allocated)) 1156c6fd2807SJeff Garzik BUG(); 1157c6fd2807SJeff Garzik qc = __ata_qc_from_tag(ap, tag); 1158c6fd2807SJeff Garzik 1159c6fd2807SJeff Garzik qc->tag = tag; 1160c6fd2807SJeff Garzik qc->scsicmd = NULL; 1161c6fd2807SJeff Garzik qc->ap = ap; 1162c6fd2807SJeff Garzik qc->dev = dev; 1163c6fd2807SJeff Garzik ata_qc_reinit(qc); 1164c6fd2807SJeff Garzik 1165c6fd2807SJeff Garzik preempted_tag = ap->active_tag; 1166c6fd2807SJeff Garzik preempted_sactive = ap->sactive; 1167c6fd2807SJeff Garzik preempted_qc_active = ap->qc_active; 1168c6fd2807SJeff Garzik ap->active_tag = ATA_TAG_POISON; 1169c6fd2807SJeff Garzik ap->sactive = 0; 1170c6fd2807SJeff Garzik ap->qc_active = 0; 1171c6fd2807SJeff Garzik 1172c6fd2807SJeff Garzik /* prepare & issue qc */ 1173c6fd2807SJeff Garzik qc->tf = *tf; 1174c6fd2807SJeff Garzik if (cdb) 1175c6fd2807SJeff Garzik memcpy(qc->cdb, cdb, ATAPI_CDB_LEN); 1176c6fd2807SJeff Garzik qc->flags |= ATA_QCFLAG_RESULT_TF; 1177c6fd2807SJeff Garzik qc->dma_dir = dma_dir; 1178c6fd2807SJeff Garzik if (dma_dir != DMA_NONE) { 11792432697bSTejun Heo unsigned int i, buflen = 0; 11802432697bSTejun Heo 11812432697bSTejun Heo for (i = 0; i < n_elem; i++) 11822432697bSTejun Heo buflen += sg[i].length; 11832432697bSTejun Heo 11842432697bSTejun Heo ata_sg_init(qc, sg, n_elem); 118549c80429SBrian King qc->nbytes = buflen; 1186c6fd2807SJeff Garzik } 1187c6fd2807SJeff Garzik 1188c6fd2807SJeff Garzik qc->private_data = &wait; 1189c6fd2807SJeff Garzik qc->complete_fn = ata_qc_complete_internal; 1190c6fd2807SJeff Garzik 1191c6fd2807SJeff Garzik ata_qc_issue(qc); 1192c6fd2807SJeff Garzik 1193c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 1194c6fd2807SJeff Garzik 1195c6fd2807SJeff Garzik rc = wait_for_completion_timeout(&wait, ata_probe_timeout); 1196c6fd2807SJeff Garzik 1197c6fd2807SJeff Garzik ata_port_flush_task(ap); 1198c6fd2807SJeff Garzik 1199c6fd2807SJeff Garzik if (!rc) { 1200c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 1201c6fd2807SJeff Garzik 1202c6fd2807SJeff Garzik /* We're racing with irq here. If we lose, the 1203c6fd2807SJeff Garzik * following test prevents us from completing the qc 1204c6fd2807SJeff Garzik * twice. If we win, the port is frozen and will be 1205c6fd2807SJeff Garzik * cleaned up by ->post_internal_cmd(). 1206c6fd2807SJeff Garzik */ 1207c6fd2807SJeff Garzik if (qc->flags & ATA_QCFLAG_ACTIVE) { 1208c6fd2807SJeff Garzik qc->err_mask |= AC_ERR_TIMEOUT; 1209c6fd2807SJeff Garzik 1210c6fd2807SJeff Garzik if (ap->ops->error_handler) 1211c6fd2807SJeff Garzik ata_port_freeze(ap); 1212c6fd2807SJeff Garzik else 1213c6fd2807SJeff Garzik ata_qc_complete(qc); 1214c6fd2807SJeff Garzik 1215c6fd2807SJeff Garzik if (ata_msg_warn(ap)) 1216c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_WARNING, 1217c6fd2807SJeff Garzik "qc timeout (cmd 0x%x)\n", command); 1218c6fd2807SJeff Garzik } 1219c6fd2807SJeff Garzik 1220c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 1221c6fd2807SJeff Garzik } 1222c6fd2807SJeff Garzik 1223c6fd2807SJeff Garzik /* do post_internal_cmd */ 1224c6fd2807SJeff Garzik if (ap->ops->post_internal_cmd) 1225c6fd2807SJeff Garzik ap->ops->post_internal_cmd(qc); 1226c6fd2807SJeff Garzik 122718d90debSAlan if ((qc->flags & ATA_QCFLAG_FAILED) && !qc->err_mask) { 1228c6fd2807SJeff Garzik if (ata_msg_warn(ap)) 1229c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_WARNING, 1230c6fd2807SJeff Garzik "zero err_mask for failed " 1231c6fd2807SJeff Garzik "internal command, assuming AC_ERR_OTHER\n"); 1232c6fd2807SJeff Garzik qc->err_mask |= AC_ERR_OTHER; 1233c6fd2807SJeff Garzik } 1234c6fd2807SJeff Garzik 1235c6fd2807SJeff Garzik /* finish up */ 1236c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 1237c6fd2807SJeff Garzik 1238c6fd2807SJeff Garzik *tf = qc->result_tf; 1239c6fd2807SJeff Garzik err_mask = qc->err_mask; 1240c6fd2807SJeff Garzik 1241c6fd2807SJeff Garzik ata_qc_free(qc); 1242c6fd2807SJeff Garzik ap->active_tag = preempted_tag; 1243c6fd2807SJeff Garzik ap->sactive = preempted_sactive; 1244c6fd2807SJeff Garzik ap->qc_active = preempted_qc_active; 1245c6fd2807SJeff Garzik 1246c6fd2807SJeff Garzik /* XXX - Some LLDDs (sata_mv) disable port on command failure. 1247c6fd2807SJeff Garzik * Until those drivers are fixed, we detect the condition 1248c6fd2807SJeff Garzik * here, fail the command with AC_ERR_SYSTEM and reenable the 1249c6fd2807SJeff Garzik * port. 1250c6fd2807SJeff Garzik * 1251c6fd2807SJeff Garzik * Note that this doesn't change any behavior as internal 1252c6fd2807SJeff Garzik * command failure results in disabling the device in the 1253c6fd2807SJeff Garzik * higher layer for LLDDs without new reset/EH callbacks. 1254c6fd2807SJeff Garzik * 1255c6fd2807SJeff Garzik * Kill the following code as soon as those drivers are fixed. 1256c6fd2807SJeff Garzik */ 1257c6fd2807SJeff Garzik if (ap->flags & ATA_FLAG_DISABLED) { 1258c6fd2807SJeff Garzik err_mask |= AC_ERR_SYSTEM; 1259c6fd2807SJeff Garzik ata_port_probe(ap); 1260c6fd2807SJeff Garzik } 1261c6fd2807SJeff Garzik 1262c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 1263c6fd2807SJeff Garzik 1264c6fd2807SJeff Garzik return err_mask; 1265c6fd2807SJeff Garzik } 1266c6fd2807SJeff Garzik 1267c6fd2807SJeff Garzik /** 126833480a0eSTejun Heo * ata_exec_internal - execute libata internal command 12692432697bSTejun Heo * @dev: Device to which the command is sent 12702432697bSTejun Heo * @tf: Taskfile registers for the command and the result 12712432697bSTejun Heo * @cdb: CDB for packet command 12722432697bSTejun Heo * @dma_dir: Data tranfer direction of the command 12732432697bSTejun Heo * @buf: Data buffer of the command 12742432697bSTejun Heo * @buflen: Length of data buffer 12752432697bSTejun Heo * 12762432697bSTejun Heo * Wrapper around ata_exec_internal_sg() which takes simple 12772432697bSTejun Heo * buffer instead of sg list. 12782432697bSTejun Heo * 12792432697bSTejun Heo * LOCKING: 12802432697bSTejun Heo * None. Should be called with kernel context, might sleep. 12812432697bSTejun Heo * 12822432697bSTejun Heo * RETURNS: 12832432697bSTejun Heo * Zero on success, AC_ERR_* mask on failure 12842432697bSTejun Heo */ 12852432697bSTejun Heo unsigned ata_exec_internal(struct ata_device *dev, 12862432697bSTejun Heo struct ata_taskfile *tf, const u8 *cdb, 12872432697bSTejun Heo int dma_dir, void *buf, unsigned int buflen) 12882432697bSTejun Heo { 128933480a0eSTejun Heo struct scatterlist *psg = NULL, sg; 129033480a0eSTejun Heo unsigned int n_elem = 0; 12912432697bSTejun Heo 129233480a0eSTejun Heo if (dma_dir != DMA_NONE) { 129333480a0eSTejun Heo WARN_ON(!buf); 12942432697bSTejun Heo sg_init_one(&sg, buf, buflen); 129533480a0eSTejun Heo psg = &sg; 129633480a0eSTejun Heo n_elem++; 129733480a0eSTejun Heo } 12982432697bSTejun Heo 129933480a0eSTejun Heo return ata_exec_internal_sg(dev, tf, cdb, dma_dir, psg, n_elem); 13002432697bSTejun Heo } 13012432697bSTejun Heo 13022432697bSTejun Heo /** 1303c6fd2807SJeff Garzik * ata_do_simple_cmd - execute simple internal command 1304c6fd2807SJeff Garzik * @dev: Device to which the command is sent 1305c6fd2807SJeff Garzik * @cmd: Opcode to execute 1306c6fd2807SJeff Garzik * 1307c6fd2807SJeff Garzik * Execute a 'simple' command, that only consists of the opcode 1308c6fd2807SJeff Garzik * 'cmd' itself, without filling any other registers 1309c6fd2807SJeff Garzik * 1310c6fd2807SJeff Garzik * LOCKING: 1311c6fd2807SJeff Garzik * Kernel thread context (may sleep). 1312c6fd2807SJeff Garzik * 1313c6fd2807SJeff Garzik * RETURNS: 1314c6fd2807SJeff Garzik * Zero on success, AC_ERR_* mask on failure 1315c6fd2807SJeff Garzik */ 1316c6fd2807SJeff Garzik unsigned int ata_do_simple_cmd(struct ata_device *dev, u8 cmd) 1317c6fd2807SJeff Garzik { 1318c6fd2807SJeff Garzik struct ata_taskfile tf; 1319c6fd2807SJeff Garzik 1320c6fd2807SJeff Garzik ata_tf_init(dev, &tf); 1321c6fd2807SJeff Garzik 1322c6fd2807SJeff Garzik tf.command = cmd; 1323c6fd2807SJeff Garzik tf.flags |= ATA_TFLAG_DEVICE; 1324c6fd2807SJeff Garzik tf.protocol = ATA_PROT_NODATA; 1325c6fd2807SJeff Garzik 1326c6fd2807SJeff Garzik return ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0); 1327c6fd2807SJeff Garzik } 1328c6fd2807SJeff Garzik 1329c6fd2807SJeff Garzik /** 1330c6fd2807SJeff Garzik * ata_pio_need_iordy - check if iordy needed 1331c6fd2807SJeff Garzik * @adev: ATA device 1332c6fd2807SJeff Garzik * 1333c6fd2807SJeff Garzik * Check if the current speed of the device requires IORDY. Used 1334c6fd2807SJeff Garzik * by various controllers for chip configuration. 1335c6fd2807SJeff Garzik */ 1336c6fd2807SJeff Garzik 1337c6fd2807SJeff Garzik unsigned int ata_pio_need_iordy(const struct ata_device *adev) 1338c6fd2807SJeff Garzik { 1339c6fd2807SJeff Garzik int pio; 1340c6fd2807SJeff Garzik int speed = adev->pio_mode - XFER_PIO_0; 1341c6fd2807SJeff Garzik 1342c6fd2807SJeff Garzik if (speed < 2) 1343c6fd2807SJeff Garzik return 0; 1344c6fd2807SJeff Garzik if (speed > 2) 1345c6fd2807SJeff Garzik return 1; 1346c6fd2807SJeff Garzik 1347c6fd2807SJeff Garzik /* If we have no drive specific rule, then PIO 2 is non IORDY */ 1348c6fd2807SJeff Garzik 1349c6fd2807SJeff Garzik if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE */ 1350c6fd2807SJeff Garzik pio = adev->id[ATA_ID_EIDE_PIO]; 1351c6fd2807SJeff Garzik /* Is the speed faster than the drive allows non IORDY ? */ 1352c6fd2807SJeff Garzik if (pio) { 1353c6fd2807SJeff Garzik /* This is cycle times not frequency - watch the logic! */ 1354c6fd2807SJeff Garzik if (pio > 240) /* PIO2 is 240nS per cycle */ 1355c6fd2807SJeff Garzik return 1; 1356c6fd2807SJeff Garzik return 0; 1357c6fd2807SJeff Garzik } 1358c6fd2807SJeff Garzik } 1359c6fd2807SJeff Garzik return 0; 1360c6fd2807SJeff Garzik } 1361c6fd2807SJeff Garzik 1362c6fd2807SJeff Garzik /** 1363c6fd2807SJeff Garzik * ata_dev_read_id - Read ID data from the specified device 1364c6fd2807SJeff Garzik * @dev: target device 1365c6fd2807SJeff Garzik * @p_class: pointer to class of the target device (may be changed) 1366bff04647STejun Heo * @flags: ATA_READID_* flags 1367c6fd2807SJeff Garzik * @id: buffer to read IDENTIFY data into 1368c6fd2807SJeff Garzik * 1369c6fd2807SJeff Garzik * Read ID data from the specified device. ATA_CMD_ID_ATA is 1370c6fd2807SJeff Garzik * performed on ATA devices and ATA_CMD_ID_ATAPI on ATAPI 1371c6fd2807SJeff Garzik * devices. This function also issues ATA_CMD_INIT_DEV_PARAMS 1372c6fd2807SJeff Garzik * for pre-ATA4 drives. 1373c6fd2807SJeff Garzik * 1374c6fd2807SJeff Garzik * LOCKING: 1375c6fd2807SJeff Garzik * Kernel thread context (may sleep) 1376c6fd2807SJeff Garzik * 1377c6fd2807SJeff Garzik * RETURNS: 1378c6fd2807SJeff Garzik * 0 on success, -errno otherwise. 1379c6fd2807SJeff Garzik */ 1380c6fd2807SJeff Garzik int ata_dev_read_id(struct ata_device *dev, unsigned int *p_class, 1381bff04647STejun Heo unsigned int flags, u16 *id) 1382c6fd2807SJeff Garzik { 1383c6fd2807SJeff Garzik struct ata_port *ap = dev->ap; 1384c6fd2807SJeff Garzik unsigned int class = *p_class; 1385c6fd2807SJeff Garzik struct ata_taskfile tf; 1386c6fd2807SJeff Garzik unsigned int err_mask = 0; 1387c6fd2807SJeff Garzik const char *reason; 1388c6fd2807SJeff Garzik int rc; 1389c6fd2807SJeff Garzik 1390c6fd2807SJeff Garzik if (ata_msg_ctl(ap)) 1391c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_DEBUG, "%s: ENTER, host %u, dev %u\n", 1392c6fd2807SJeff Garzik __FUNCTION__, ap->id, dev->devno); 1393c6fd2807SJeff Garzik 1394c6fd2807SJeff Garzik ata_dev_select(ap, dev->devno, 1, 1); /* select device 0/1 */ 1395c6fd2807SJeff Garzik 1396c6fd2807SJeff Garzik retry: 1397c6fd2807SJeff Garzik ata_tf_init(dev, &tf); 1398c6fd2807SJeff Garzik 1399c6fd2807SJeff Garzik switch (class) { 1400c6fd2807SJeff Garzik case ATA_DEV_ATA: 1401c6fd2807SJeff Garzik tf.command = ATA_CMD_ID_ATA; 1402c6fd2807SJeff Garzik break; 1403c6fd2807SJeff Garzik case ATA_DEV_ATAPI: 1404c6fd2807SJeff Garzik tf.command = ATA_CMD_ID_ATAPI; 1405c6fd2807SJeff Garzik break; 1406c6fd2807SJeff Garzik default: 1407c6fd2807SJeff Garzik rc = -ENODEV; 1408c6fd2807SJeff Garzik reason = "unsupported class"; 1409c6fd2807SJeff Garzik goto err_out; 1410c6fd2807SJeff Garzik } 1411c6fd2807SJeff Garzik 1412c6fd2807SJeff Garzik tf.protocol = ATA_PROT_PIO; 1413800b3996STejun Heo tf.flags |= ATA_TFLAG_POLLING; /* for polling presence detection */ 1414c6fd2807SJeff Garzik 1415c6fd2807SJeff Garzik err_mask = ata_exec_internal(dev, &tf, NULL, DMA_FROM_DEVICE, 1416c6fd2807SJeff Garzik id, sizeof(id[0]) * ATA_ID_WORDS); 1417c6fd2807SJeff Garzik if (err_mask) { 1418800b3996STejun Heo if (err_mask & AC_ERR_NODEV_HINT) { 141955a8e2c8STejun Heo DPRINTK("ata%u.%d: NODEV after polling detection\n", 142055a8e2c8STejun Heo ap->id, dev->devno); 142155a8e2c8STejun Heo return -ENOENT; 142255a8e2c8STejun Heo } 142355a8e2c8STejun Heo 1424c6fd2807SJeff Garzik rc = -EIO; 1425c6fd2807SJeff Garzik reason = "I/O error"; 1426c6fd2807SJeff Garzik goto err_out; 1427c6fd2807SJeff Garzik } 1428c6fd2807SJeff Garzik 1429c6fd2807SJeff Garzik swap_buf_le16(id, ATA_ID_WORDS); 1430c6fd2807SJeff Garzik 1431c6fd2807SJeff Garzik /* sanity check */ 1432c6fd2807SJeff Garzik rc = -EINVAL; 1433c6fd2807SJeff Garzik reason = "device reports illegal type"; 14344a3381feSJeff Garzik 14354a3381feSJeff Garzik if (class == ATA_DEV_ATA) { 14364a3381feSJeff Garzik if (!ata_id_is_ata(id) && !ata_id_is_cfa(id)) 14374a3381feSJeff Garzik goto err_out; 14384a3381feSJeff Garzik } else { 14394a3381feSJeff Garzik if (ata_id_is_ata(id)) 1440c6fd2807SJeff Garzik goto err_out; 1441c6fd2807SJeff Garzik } 1442c6fd2807SJeff Garzik 1443bff04647STejun Heo if ((flags & ATA_READID_POSTRESET) && class == ATA_DEV_ATA) { 1444c6fd2807SJeff Garzik /* 1445c6fd2807SJeff Garzik * The exact sequence expected by certain pre-ATA4 drives is: 1446c6fd2807SJeff Garzik * SRST RESET 1447c6fd2807SJeff Garzik * IDENTIFY 1448c6fd2807SJeff Garzik * INITIALIZE DEVICE PARAMETERS 1449c6fd2807SJeff Garzik * anything else.. 1450c6fd2807SJeff Garzik * Some drives were very specific about that exact sequence. 1451c6fd2807SJeff Garzik */ 1452c6fd2807SJeff Garzik if (ata_id_major_version(id) < 4 || !ata_id_has_lba(id)) { 1453c6fd2807SJeff Garzik err_mask = ata_dev_init_params(dev, id[3], id[6]); 1454c6fd2807SJeff Garzik if (err_mask) { 1455c6fd2807SJeff Garzik rc = -EIO; 1456c6fd2807SJeff Garzik reason = "INIT_DEV_PARAMS failed"; 1457c6fd2807SJeff Garzik goto err_out; 1458c6fd2807SJeff Garzik } 1459c6fd2807SJeff Garzik 1460c6fd2807SJeff Garzik /* current CHS translation info (id[53-58]) might be 1461c6fd2807SJeff Garzik * changed. reread the identify device info. 1462c6fd2807SJeff Garzik */ 1463bff04647STejun Heo flags &= ~ATA_READID_POSTRESET; 1464c6fd2807SJeff Garzik goto retry; 1465c6fd2807SJeff Garzik } 1466c6fd2807SJeff Garzik } 1467c6fd2807SJeff Garzik 1468c6fd2807SJeff Garzik *p_class = class; 1469c6fd2807SJeff Garzik 1470c6fd2807SJeff Garzik return 0; 1471c6fd2807SJeff Garzik 1472c6fd2807SJeff Garzik err_out: 1473c6fd2807SJeff Garzik if (ata_msg_warn(ap)) 1474c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_WARNING, "failed to IDENTIFY " 1475c6fd2807SJeff Garzik "(%s, err_mask=0x%x)\n", reason, err_mask); 1476c6fd2807SJeff Garzik return rc; 1477c6fd2807SJeff Garzik } 1478c6fd2807SJeff Garzik 1479c6fd2807SJeff Garzik static inline u8 ata_dev_knobble(struct ata_device *dev) 1480c6fd2807SJeff Garzik { 1481c6fd2807SJeff Garzik return ((dev->ap->cbl == ATA_CBL_SATA) && (!ata_id_is_sata(dev->id))); 1482c6fd2807SJeff Garzik } 1483c6fd2807SJeff Garzik 1484c6fd2807SJeff Garzik static void ata_dev_config_ncq(struct ata_device *dev, 1485c6fd2807SJeff Garzik char *desc, size_t desc_sz) 1486c6fd2807SJeff Garzik { 1487c6fd2807SJeff Garzik struct ata_port *ap = dev->ap; 1488c6fd2807SJeff Garzik int hdepth = 0, ddepth = ata_id_queue_depth(dev->id); 1489c6fd2807SJeff Garzik 1490c6fd2807SJeff Garzik if (!ata_id_has_ncq(dev->id)) { 1491c6fd2807SJeff Garzik desc[0] = '\0'; 1492c6fd2807SJeff Garzik return; 1493c6fd2807SJeff Garzik } 14946919a0a6SAlan Cox if (ata_device_blacklisted(dev) & ATA_HORKAGE_NONCQ) { 14956919a0a6SAlan Cox snprintf(desc, desc_sz, "NCQ (not used)"); 14966919a0a6SAlan Cox return; 14976919a0a6SAlan Cox } 1498c6fd2807SJeff Garzik if (ap->flags & ATA_FLAG_NCQ) { 1499cca3974eSJeff Garzik hdepth = min(ap->scsi_host->can_queue, ATA_MAX_QUEUE - 1); 1500c6fd2807SJeff Garzik dev->flags |= ATA_DFLAG_NCQ; 1501c6fd2807SJeff Garzik } 1502c6fd2807SJeff Garzik 1503c6fd2807SJeff Garzik if (hdepth >= ddepth) 1504c6fd2807SJeff Garzik snprintf(desc, desc_sz, "NCQ (depth %d)", ddepth); 1505c6fd2807SJeff Garzik else 1506c6fd2807SJeff Garzik snprintf(desc, desc_sz, "NCQ (depth %d/%d)", hdepth, ddepth); 1507c6fd2807SJeff Garzik } 1508c6fd2807SJeff Garzik 1509c6fd2807SJeff Garzik static void ata_set_port_max_cmd_len(struct ata_port *ap) 1510c6fd2807SJeff Garzik { 1511c6fd2807SJeff Garzik int i; 1512c6fd2807SJeff Garzik 1513cca3974eSJeff Garzik if (ap->scsi_host) { 1514cca3974eSJeff Garzik unsigned int len = 0; 1515cca3974eSJeff Garzik 1516c6fd2807SJeff Garzik for (i = 0; i < ATA_MAX_DEVICES; i++) 1517cca3974eSJeff Garzik len = max(len, ap->device[i].cdb_len); 1518cca3974eSJeff Garzik 1519cca3974eSJeff Garzik ap->scsi_host->max_cmd_len = len; 1520c6fd2807SJeff Garzik } 1521c6fd2807SJeff Garzik } 1522c6fd2807SJeff Garzik 1523c6fd2807SJeff Garzik /** 1524c6fd2807SJeff Garzik * ata_dev_configure - Configure the specified ATA/ATAPI device 1525c6fd2807SJeff Garzik * @dev: Target device to configure 1526c6fd2807SJeff Garzik * 1527c6fd2807SJeff Garzik * Configure @dev according to @dev->id. Generic and low-level 1528c6fd2807SJeff Garzik * driver specific fixups are also applied. 1529c6fd2807SJeff Garzik * 1530c6fd2807SJeff Garzik * LOCKING: 1531c6fd2807SJeff Garzik * Kernel thread context (may sleep) 1532c6fd2807SJeff Garzik * 1533c6fd2807SJeff Garzik * RETURNS: 1534c6fd2807SJeff Garzik * 0 on success, -errno otherwise 1535c6fd2807SJeff Garzik */ 1536efdaedc4STejun Heo int ata_dev_configure(struct ata_device *dev) 1537c6fd2807SJeff Garzik { 1538c6fd2807SJeff Garzik struct ata_port *ap = dev->ap; 1539efdaedc4STejun Heo int print_info = ap->eh_context.i.flags & ATA_EHI_PRINTINFO; 1540c6fd2807SJeff Garzik const u16 *id = dev->id; 1541c6fd2807SJeff Garzik unsigned int xfer_mask; 1542b352e57dSAlan Cox char revbuf[7]; /* XYZ-99\0 */ 1543c6fd2807SJeff Garzik int rc; 1544c6fd2807SJeff Garzik 1545c6fd2807SJeff Garzik if (!ata_dev_enabled(dev) && ata_msg_info(ap)) { 1546c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_INFO, 1547c6fd2807SJeff Garzik "%s: ENTER/EXIT (host %u, dev %u) -- nodev\n", 1548c6fd2807SJeff Garzik __FUNCTION__, ap->id, dev->devno); 1549c6fd2807SJeff Garzik return 0; 1550c6fd2807SJeff Garzik } 1551c6fd2807SJeff Garzik 1552c6fd2807SJeff Garzik if (ata_msg_probe(ap)) 1553c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_DEBUG, "%s: ENTER, host %u, dev %u\n", 1554c6fd2807SJeff Garzik __FUNCTION__, ap->id, dev->devno); 1555c6fd2807SJeff Garzik 1556c6fd2807SJeff Garzik /* print device capabilities */ 1557c6fd2807SJeff Garzik if (ata_msg_probe(ap)) 1558c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_DEBUG, 1559c6fd2807SJeff Garzik "%s: cfg 49:%04x 82:%04x 83:%04x 84:%04x " 1560c6fd2807SJeff Garzik "85:%04x 86:%04x 87:%04x 88:%04x\n", 1561c6fd2807SJeff Garzik __FUNCTION__, 1562c6fd2807SJeff Garzik id[49], id[82], id[83], id[84], 1563c6fd2807SJeff Garzik id[85], id[86], id[87], id[88]); 1564c6fd2807SJeff Garzik 1565c6fd2807SJeff Garzik /* initialize to-be-configured parameters */ 1566c6fd2807SJeff Garzik dev->flags &= ~ATA_DFLAG_CFG_MASK; 1567c6fd2807SJeff Garzik dev->max_sectors = 0; 1568c6fd2807SJeff Garzik dev->cdb_len = 0; 1569c6fd2807SJeff Garzik dev->n_sectors = 0; 1570c6fd2807SJeff Garzik dev->cylinders = 0; 1571c6fd2807SJeff Garzik dev->heads = 0; 1572c6fd2807SJeff Garzik dev->sectors = 0; 1573c6fd2807SJeff Garzik 1574c6fd2807SJeff Garzik /* 1575c6fd2807SJeff Garzik * common ATA, ATAPI feature tests 1576c6fd2807SJeff Garzik */ 1577c6fd2807SJeff Garzik 1578c6fd2807SJeff Garzik /* find max transfer mode; for printk only */ 1579c6fd2807SJeff Garzik xfer_mask = ata_id_xfermask(id); 1580c6fd2807SJeff Garzik 1581c6fd2807SJeff Garzik if (ata_msg_probe(ap)) 1582c6fd2807SJeff Garzik ata_dump_id(id); 1583c6fd2807SJeff Garzik 1584c6fd2807SJeff Garzik /* ATA-specific feature tests */ 1585c6fd2807SJeff Garzik if (dev->class == ATA_DEV_ATA) { 1586b352e57dSAlan Cox if (ata_id_is_cfa(id)) { 1587b352e57dSAlan Cox if (id[162] & 1) /* CPRM may make this media unusable */ 1588b352e57dSAlan Cox ata_dev_printk(dev, KERN_WARNING, "ata%u: device %u supports DRM functions and may not be fully accessable.\n", 1589b352e57dSAlan Cox ap->id, dev->devno); 1590b352e57dSAlan Cox snprintf(revbuf, 7, "CFA"); 1591b352e57dSAlan Cox } 1592b352e57dSAlan Cox else 1593b352e57dSAlan Cox snprintf(revbuf, 7, "ATA-%d", ata_id_major_version(id)); 1594b352e57dSAlan Cox 1595c6fd2807SJeff Garzik dev->n_sectors = ata_id_n_sectors(id); 1596c6fd2807SJeff Garzik 1597c6fd2807SJeff Garzik if (ata_id_has_lba(id)) { 1598c6fd2807SJeff Garzik const char *lba_desc; 1599c6fd2807SJeff Garzik char ncq_desc[20]; 1600c6fd2807SJeff Garzik 1601c6fd2807SJeff Garzik lba_desc = "LBA"; 1602c6fd2807SJeff Garzik dev->flags |= ATA_DFLAG_LBA; 1603c6fd2807SJeff Garzik if (ata_id_has_lba48(id)) { 1604c6fd2807SJeff Garzik dev->flags |= ATA_DFLAG_LBA48; 1605c6fd2807SJeff Garzik lba_desc = "LBA48"; 16066fc49adbSTejun Heo 16076fc49adbSTejun Heo if (dev->n_sectors >= (1UL << 28) && 16086fc49adbSTejun Heo ata_id_has_flush_ext(id)) 16096fc49adbSTejun Heo dev->flags |= ATA_DFLAG_FLUSH_EXT; 1610c6fd2807SJeff Garzik } 1611c6fd2807SJeff Garzik 1612c6fd2807SJeff Garzik /* config NCQ */ 1613c6fd2807SJeff Garzik ata_dev_config_ncq(dev, ncq_desc, sizeof(ncq_desc)); 1614c6fd2807SJeff Garzik 1615c6fd2807SJeff Garzik /* print device info to dmesg */ 1616c6fd2807SJeff Garzik if (ata_msg_drv(ap) && print_info) 1617b352e57dSAlan Cox ata_dev_printk(dev, KERN_INFO, "%s, " 1618c6fd2807SJeff Garzik "max %s, %Lu sectors: %s %s\n", 1619b352e57dSAlan Cox revbuf, 1620c6fd2807SJeff Garzik ata_mode_string(xfer_mask), 1621c6fd2807SJeff Garzik (unsigned long long)dev->n_sectors, 1622c6fd2807SJeff Garzik lba_desc, ncq_desc); 1623c6fd2807SJeff Garzik } else { 1624c6fd2807SJeff Garzik /* CHS */ 1625c6fd2807SJeff Garzik 1626c6fd2807SJeff Garzik /* Default translation */ 1627c6fd2807SJeff Garzik dev->cylinders = id[1]; 1628c6fd2807SJeff Garzik dev->heads = id[3]; 1629c6fd2807SJeff Garzik dev->sectors = id[6]; 1630c6fd2807SJeff Garzik 1631c6fd2807SJeff Garzik if (ata_id_current_chs_valid(id)) { 1632c6fd2807SJeff Garzik /* Current CHS translation is valid. */ 1633c6fd2807SJeff Garzik dev->cylinders = id[54]; 1634c6fd2807SJeff Garzik dev->heads = id[55]; 1635c6fd2807SJeff Garzik dev->sectors = id[56]; 1636c6fd2807SJeff Garzik } 1637c6fd2807SJeff Garzik 1638c6fd2807SJeff Garzik /* print device info to dmesg */ 1639c6fd2807SJeff Garzik if (ata_msg_drv(ap) && print_info) 1640b352e57dSAlan Cox ata_dev_printk(dev, KERN_INFO, "%s, " 1641c6fd2807SJeff Garzik "max %s, %Lu sectors: CHS %u/%u/%u\n", 1642b352e57dSAlan Cox revbuf, 1643c6fd2807SJeff Garzik ata_mode_string(xfer_mask), 1644c6fd2807SJeff Garzik (unsigned long long)dev->n_sectors, 1645c6fd2807SJeff Garzik dev->cylinders, dev->heads, 1646c6fd2807SJeff Garzik dev->sectors); 1647c6fd2807SJeff Garzik } 1648c6fd2807SJeff Garzik 1649c6fd2807SJeff Garzik if (dev->id[59] & 0x100) { 1650c6fd2807SJeff Garzik dev->multi_count = dev->id[59] & 0xff; 1651c6fd2807SJeff Garzik if (ata_msg_drv(ap) && print_info) 1652c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_INFO, 1653c6fd2807SJeff Garzik "ata%u: dev %u multi count %u\n", 1654c6fd2807SJeff Garzik ap->id, dev->devno, dev->multi_count); 1655c6fd2807SJeff Garzik } 1656c6fd2807SJeff Garzik 1657c6fd2807SJeff Garzik dev->cdb_len = 16; 1658c6fd2807SJeff Garzik } 1659c6fd2807SJeff Garzik 1660c6fd2807SJeff Garzik /* ATAPI-specific feature tests */ 1661c6fd2807SJeff Garzik else if (dev->class == ATA_DEV_ATAPI) { 1662c6fd2807SJeff Garzik char *cdb_intr_string = ""; 1663c6fd2807SJeff Garzik 1664c6fd2807SJeff Garzik rc = atapi_cdb_len(id); 1665c6fd2807SJeff Garzik if ((rc < 12) || (rc > ATAPI_CDB_LEN)) { 1666c6fd2807SJeff Garzik if (ata_msg_warn(ap)) 1667c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_WARNING, 1668c6fd2807SJeff Garzik "unsupported CDB len\n"); 1669c6fd2807SJeff Garzik rc = -EINVAL; 1670c6fd2807SJeff Garzik goto err_out_nosup; 1671c6fd2807SJeff Garzik } 1672c6fd2807SJeff Garzik dev->cdb_len = (unsigned int) rc; 1673c6fd2807SJeff Garzik 1674c6fd2807SJeff Garzik if (ata_id_cdb_intr(dev->id)) { 1675c6fd2807SJeff Garzik dev->flags |= ATA_DFLAG_CDB_INTR; 1676c6fd2807SJeff Garzik cdb_intr_string = ", CDB intr"; 1677c6fd2807SJeff Garzik } 1678c6fd2807SJeff Garzik 1679c6fd2807SJeff Garzik /* print device info to dmesg */ 1680c6fd2807SJeff Garzik if (ata_msg_drv(ap) && print_info) 1681c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_INFO, "ATAPI, max %s%s\n", 1682c6fd2807SJeff Garzik ata_mode_string(xfer_mask), 1683c6fd2807SJeff Garzik cdb_intr_string); 1684c6fd2807SJeff Garzik } 1685c6fd2807SJeff Garzik 1686914ed354STejun Heo /* determine max_sectors */ 1687914ed354STejun Heo dev->max_sectors = ATA_MAX_SECTORS; 1688914ed354STejun Heo if (dev->flags & ATA_DFLAG_LBA48) 1689914ed354STejun Heo dev->max_sectors = ATA_MAX_SECTORS_LBA48; 1690914ed354STejun Heo 169193590859SAlan Cox if (dev->horkage & ATA_HORKAGE_DIAGNOSTIC) { 169293590859SAlan Cox /* Let the user know. We don't want to disallow opens for 169393590859SAlan Cox rescue purposes, or in case the vendor is just a blithering 169493590859SAlan Cox idiot */ 169593590859SAlan Cox if (print_info) { 169693590859SAlan Cox ata_dev_printk(dev, KERN_WARNING, 169793590859SAlan Cox "Drive reports diagnostics failure. This may indicate a drive\n"); 169893590859SAlan Cox ata_dev_printk(dev, KERN_WARNING, 169993590859SAlan Cox "fault or invalid emulation. Contact drive vendor for information.\n"); 170093590859SAlan Cox } 170193590859SAlan Cox } 170293590859SAlan Cox 1703c6fd2807SJeff Garzik ata_set_port_max_cmd_len(ap); 1704c6fd2807SJeff Garzik 1705c6fd2807SJeff Garzik /* limit bridge transfers to udma5, 200 sectors */ 1706c6fd2807SJeff Garzik if (ata_dev_knobble(dev)) { 1707c6fd2807SJeff Garzik if (ata_msg_drv(ap) && print_info) 1708c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_INFO, 1709c6fd2807SJeff Garzik "applying bridge limits\n"); 1710c6fd2807SJeff Garzik dev->udma_mask &= ATA_UDMA5; 1711c6fd2807SJeff Garzik dev->max_sectors = ATA_MAX_SECTORS; 1712c6fd2807SJeff Garzik } 1713c6fd2807SJeff Garzik 1714c6fd2807SJeff Garzik if (ap->ops->dev_config) 1715c6fd2807SJeff Garzik ap->ops->dev_config(ap, dev); 1716c6fd2807SJeff Garzik 1717c6fd2807SJeff Garzik if (ata_msg_probe(ap)) 1718c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_DEBUG, "%s: EXIT, drv_stat = 0x%x\n", 1719c6fd2807SJeff Garzik __FUNCTION__, ata_chk_status(ap)); 1720c6fd2807SJeff Garzik return 0; 1721c6fd2807SJeff Garzik 1722c6fd2807SJeff Garzik err_out_nosup: 1723c6fd2807SJeff Garzik if (ata_msg_probe(ap)) 1724c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_DEBUG, 1725c6fd2807SJeff Garzik "%s: EXIT, err\n", __FUNCTION__); 1726c6fd2807SJeff Garzik return rc; 1727c6fd2807SJeff Garzik } 1728c6fd2807SJeff Garzik 1729c6fd2807SJeff Garzik /** 1730c6fd2807SJeff Garzik * ata_bus_probe - Reset and probe ATA bus 1731c6fd2807SJeff Garzik * @ap: Bus to probe 1732c6fd2807SJeff Garzik * 1733c6fd2807SJeff Garzik * Master ATA bus probing function. Initiates a hardware-dependent 1734c6fd2807SJeff Garzik * bus reset, then attempts to identify any devices found on 1735c6fd2807SJeff Garzik * the bus. 1736c6fd2807SJeff Garzik * 1737c6fd2807SJeff Garzik * LOCKING: 1738c6fd2807SJeff Garzik * PCI/etc. bus probe sem. 1739c6fd2807SJeff Garzik * 1740c6fd2807SJeff Garzik * RETURNS: 1741c6fd2807SJeff Garzik * Zero on success, negative errno otherwise. 1742c6fd2807SJeff Garzik */ 1743c6fd2807SJeff Garzik 1744c6fd2807SJeff Garzik int ata_bus_probe(struct ata_port *ap) 1745c6fd2807SJeff Garzik { 1746c6fd2807SJeff Garzik unsigned int classes[ATA_MAX_DEVICES]; 1747c6fd2807SJeff Garzik int tries[ATA_MAX_DEVICES]; 1748c6fd2807SJeff Garzik int i, rc, down_xfermask; 1749c6fd2807SJeff Garzik struct ata_device *dev; 1750c6fd2807SJeff Garzik 1751c6fd2807SJeff Garzik ata_port_probe(ap); 1752c6fd2807SJeff Garzik 1753c6fd2807SJeff Garzik for (i = 0; i < ATA_MAX_DEVICES; i++) 1754c6fd2807SJeff Garzik tries[i] = ATA_PROBE_MAX_TRIES; 1755c6fd2807SJeff Garzik 1756c6fd2807SJeff Garzik retry: 1757c6fd2807SJeff Garzik down_xfermask = 0; 1758c6fd2807SJeff Garzik 1759c6fd2807SJeff Garzik /* reset and determine device classes */ 1760c6fd2807SJeff Garzik ap->ops->phy_reset(ap); 1761c6fd2807SJeff Garzik 1762c6fd2807SJeff Garzik for (i = 0; i < ATA_MAX_DEVICES; i++) { 1763c6fd2807SJeff Garzik dev = &ap->device[i]; 1764c6fd2807SJeff Garzik 1765c6fd2807SJeff Garzik if (!(ap->flags & ATA_FLAG_DISABLED) && 1766c6fd2807SJeff Garzik dev->class != ATA_DEV_UNKNOWN) 1767c6fd2807SJeff Garzik classes[dev->devno] = dev->class; 1768c6fd2807SJeff Garzik else 1769c6fd2807SJeff Garzik classes[dev->devno] = ATA_DEV_NONE; 1770c6fd2807SJeff Garzik 1771c6fd2807SJeff Garzik dev->class = ATA_DEV_UNKNOWN; 1772c6fd2807SJeff Garzik } 1773c6fd2807SJeff Garzik 1774c6fd2807SJeff Garzik ata_port_probe(ap); 1775c6fd2807SJeff Garzik 1776c6fd2807SJeff Garzik /* after the reset the device state is PIO 0 and the controller 1777c6fd2807SJeff Garzik state is undefined. Record the mode */ 1778c6fd2807SJeff Garzik 1779c6fd2807SJeff Garzik for (i = 0; i < ATA_MAX_DEVICES; i++) 1780c6fd2807SJeff Garzik ap->device[i].pio_mode = XFER_PIO_0; 1781c6fd2807SJeff Garzik 1782c6fd2807SJeff Garzik /* read IDENTIFY page and configure devices */ 1783c6fd2807SJeff Garzik for (i = 0; i < ATA_MAX_DEVICES; i++) { 1784c6fd2807SJeff Garzik dev = &ap->device[i]; 1785c6fd2807SJeff Garzik 1786c6fd2807SJeff Garzik if (tries[i]) 1787c6fd2807SJeff Garzik dev->class = classes[i]; 1788c6fd2807SJeff Garzik 1789c6fd2807SJeff Garzik if (!ata_dev_enabled(dev)) 1790c6fd2807SJeff Garzik continue; 1791c6fd2807SJeff Garzik 1792bff04647STejun Heo rc = ata_dev_read_id(dev, &dev->class, ATA_READID_POSTRESET, 1793bff04647STejun Heo dev->id); 1794c6fd2807SJeff Garzik if (rc) 1795c6fd2807SJeff Garzik goto fail; 1796c6fd2807SJeff Garzik 1797efdaedc4STejun Heo ap->eh_context.i.flags |= ATA_EHI_PRINTINFO; 1798efdaedc4STejun Heo rc = ata_dev_configure(dev); 1799efdaedc4STejun Heo ap->eh_context.i.flags &= ~ATA_EHI_PRINTINFO; 1800c6fd2807SJeff Garzik if (rc) 1801c6fd2807SJeff Garzik goto fail; 1802c6fd2807SJeff Garzik } 1803c6fd2807SJeff Garzik 1804c6fd2807SJeff Garzik /* configure transfer mode */ 1805c6fd2807SJeff Garzik rc = ata_set_mode(ap, &dev); 1806c6fd2807SJeff Garzik if (rc) { 1807c6fd2807SJeff Garzik down_xfermask = 1; 1808c6fd2807SJeff Garzik goto fail; 1809c6fd2807SJeff Garzik } 1810c6fd2807SJeff Garzik 1811c6fd2807SJeff Garzik for (i = 0; i < ATA_MAX_DEVICES; i++) 1812c6fd2807SJeff Garzik if (ata_dev_enabled(&ap->device[i])) 1813c6fd2807SJeff Garzik return 0; 1814c6fd2807SJeff Garzik 1815c6fd2807SJeff Garzik /* no device present, disable port */ 1816c6fd2807SJeff Garzik ata_port_disable(ap); 1817c6fd2807SJeff Garzik ap->ops->port_disable(ap); 1818c6fd2807SJeff Garzik return -ENODEV; 1819c6fd2807SJeff Garzik 1820c6fd2807SJeff Garzik fail: 1821c6fd2807SJeff Garzik switch (rc) { 1822c6fd2807SJeff Garzik case -EINVAL: 1823c6fd2807SJeff Garzik case -ENODEV: 1824c6fd2807SJeff Garzik tries[dev->devno] = 0; 1825c6fd2807SJeff Garzik break; 1826c6fd2807SJeff Garzik case -EIO: 1827c6fd2807SJeff Garzik sata_down_spd_limit(ap); 1828c6fd2807SJeff Garzik /* fall through */ 1829c6fd2807SJeff Garzik default: 1830c6fd2807SJeff Garzik tries[dev->devno]--; 1831c6fd2807SJeff Garzik if (down_xfermask && 1832c6fd2807SJeff Garzik ata_down_xfermask_limit(dev, tries[dev->devno] == 1)) 1833c6fd2807SJeff Garzik tries[dev->devno] = 0; 1834c6fd2807SJeff Garzik } 1835c6fd2807SJeff Garzik 1836c6fd2807SJeff Garzik if (!tries[dev->devno]) { 1837c6fd2807SJeff Garzik ata_down_xfermask_limit(dev, 1); 1838c6fd2807SJeff Garzik ata_dev_disable(dev); 1839c6fd2807SJeff Garzik } 1840c6fd2807SJeff Garzik 1841c6fd2807SJeff Garzik goto retry; 1842c6fd2807SJeff Garzik } 1843c6fd2807SJeff Garzik 1844c6fd2807SJeff Garzik /** 1845c6fd2807SJeff Garzik * ata_port_probe - Mark port as enabled 1846c6fd2807SJeff Garzik * @ap: Port for which we indicate enablement 1847c6fd2807SJeff Garzik * 1848c6fd2807SJeff Garzik * Modify @ap data structure such that the system 1849c6fd2807SJeff Garzik * thinks that the entire port is enabled. 1850c6fd2807SJeff Garzik * 1851cca3974eSJeff Garzik * LOCKING: host lock, or some other form of 1852c6fd2807SJeff Garzik * serialization. 1853c6fd2807SJeff Garzik */ 1854c6fd2807SJeff Garzik 1855c6fd2807SJeff Garzik void ata_port_probe(struct ata_port *ap) 1856c6fd2807SJeff Garzik { 1857c6fd2807SJeff Garzik ap->flags &= ~ATA_FLAG_DISABLED; 1858c6fd2807SJeff Garzik } 1859c6fd2807SJeff Garzik 1860c6fd2807SJeff Garzik /** 1861c6fd2807SJeff Garzik * sata_print_link_status - Print SATA link status 1862c6fd2807SJeff Garzik * @ap: SATA port to printk link status about 1863c6fd2807SJeff Garzik * 1864c6fd2807SJeff Garzik * This function prints link speed and status of a SATA link. 1865c6fd2807SJeff Garzik * 1866c6fd2807SJeff Garzik * LOCKING: 1867c6fd2807SJeff Garzik * None. 1868c6fd2807SJeff Garzik */ 1869c6fd2807SJeff Garzik static void sata_print_link_status(struct ata_port *ap) 1870c6fd2807SJeff Garzik { 1871c6fd2807SJeff Garzik u32 sstatus, scontrol, tmp; 1872c6fd2807SJeff Garzik 1873c6fd2807SJeff Garzik if (sata_scr_read(ap, SCR_STATUS, &sstatus)) 1874c6fd2807SJeff Garzik return; 1875c6fd2807SJeff Garzik sata_scr_read(ap, SCR_CONTROL, &scontrol); 1876c6fd2807SJeff Garzik 1877c6fd2807SJeff Garzik if (ata_port_online(ap)) { 1878c6fd2807SJeff Garzik tmp = (sstatus >> 4) & 0xf; 1879c6fd2807SJeff Garzik ata_port_printk(ap, KERN_INFO, 1880c6fd2807SJeff Garzik "SATA link up %s (SStatus %X SControl %X)\n", 1881c6fd2807SJeff Garzik sata_spd_string(tmp), sstatus, scontrol); 1882c6fd2807SJeff Garzik } else { 1883c6fd2807SJeff Garzik ata_port_printk(ap, KERN_INFO, 1884c6fd2807SJeff Garzik "SATA link down (SStatus %X SControl %X)\n", 1885c6fd2807SJeff Garzik sstatus, scontrol); 1886c6fd2807SJeff Garzik } 1887c6fd2807SJeff Garzik } 1888c6fd2807SJeff Garzik 1889c6fd2807SJeff Garzik /** 1890c6fd2807SJeff Garzik * __sata_phy_reset - Wake/reset a low-level SATA PHY 1891c6fd2807SJeff Garzik * @ap: SATA port associated with target SATA PHY. 1892c6fd2807SJeff Garzik * 1893c6fd2807SJeff Garzik * This function issues commands to standard SATA Sxxx 1894c6fd2807SJeff Garzik * PHY registers, to wake up the phy (and device), and 1895c6fd2807SJeff Garzik * clear any reset condition. 1896c6fd2807SJeff Garzik * 1897c6fd2807SJeff Garzik * LOCKING: 1898c6fd2807SJeff Garzik * PCI/etc. bus probe sem. 1899c6fd2807SJeff Garzik * 1900c6fd2807SJeff Garzik */ 1901c6fd2807SJeff Garzik void __sata_phy_reset(struct ata_port *ap) 1902c6fd2807SJeff Garzik { 1903c6fd2807SJeff Garzik u32 sstatus; 1904c6fd2807SJeff Garzik unsigned long timeout = jiffies + (HZ * 5); 1905c6fd2807SJeff Garzik 1906c6fd2807SJeff Garzik if (ap->flags & ATA_FLAG_SATA_RESET) { 1907c6fd2807SJeff Garzik /* issue phy wake/reset */ 1908c6fd2807SJeff Garzik sata_scr_write_flush(ap, SCR_CONTROL, 0x301); 1909c6fd2807SJeff Garzik /* Couldn't find anything in SATA I/II specs, but 1910c6fd2807SJeff Garzik * AHCI-1.1 10.4.2 says at least 1 ms. */ 1911c6fd2807SJeff Garzik mdelay(1); 1912c6fd2807SJeff Garzik } 1913c6fd2807SJeff Garzik /* phy wake/clear reset */ 1914c6fd2807SJeff Garzik sata_scr_write_flush(ap, SCR_CONTROL, 0x300); 1915c6fd2807SJeff Garzik 1916c6fd2807SJeff Garzik /* wait for phy to become ready, if necessary */ 1917c6fd2807SJeff Garzik do { 1918c6fd2807SJeff Garzik msleep(200); 1919c6fd2807SJeff Garzik sata_scr_read(ap, SCR_STATUS, &sstatus); 1920c6fd2807SJeff Garzik if ((sstatus & 0xf) != 1) 1921c6fd2807SJeff Garzik break; 1922c6fd2807SJeff Garzik } while (time_before(jiffies, timeout)); 1923c6fd2807SJeff Garzik 1924c6fd2807SJeff Garzik /* print link status */ 1925c6fd2807SJeff Garzik sata_print_link_status(ap); 1926c6fd2807SJeff Garzik 1927c6fd2807SJeff Garzik /* TODO: phy layer with polling, timeouts, etc. */ 1928c6fd2807SJeff Garzik if (!ata_port_offline(ap)) 1929c6fd2807SJeff Garzik ata_port_probe(ap); 1930c6fd2807SJeff Garzik else 1931c6fd2807SJeff Garzik ata_port_disable(ap); 1932c6fd2807SJeff Garzik 1933c6fd2807SJeff Garzik if (ap->flags & ATA_FLAG_DISABLED) 1934c6fd2807SJeff Garzik return; 1935c6fd2807SJeff Garzik 1936c6fd2807SJeff Garzik if (ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT)) { 1937c6fd2807SJeff Garzik ata_port_disable(ap); 1938c6fd2807SJeff Garzik return; 1939c6fd2807SJeff Garzik } 1940c6fd2807SJeff Garzik 1941c6fd2807SJeff Garzik ap->cbl = ATA_CBL_SATA; 1942c6fd2807SJeff Garzik } 1943c6fd2807SJeff Garzik 1944c6fd2807SJeff Garzik /** 1945c6fd2807SJeff Garzik * sata_phy_reset - Reset SATA bus. 1946c6fd2807SJeff Garzik * @ap: SATA port associated with target SATA PHY. 1947c6fd2807SJeff Garzik * 1948c6fd2807SJeff Garzik * This function resets the SATA bus, and then probes 1949c6fd2807SJeff Garzik * the bus for devices. 1950c6fd2807SJeff Garzik * 1951c6fd2807SJeff Garzik * LOCKING: 1952c6fd2807SJeff Garzik * PCI/etc. bus probe sem. 1953c6fd2807SJeff Garzik * 1954c6fd2807SJeff Garzik */ 1955c6fd2807SJeff Garzik void sata_phy_reset(struct ata_port *ap) 1956c6fd2807SJeff Garzik { 1957c6fd2807SJeff Garzik __sata_phy_reset(ap); 1958c6fd2807SJeff Garzik if (ap->flags & ATA_FLAG_DISABLED) 1959c6fd2807SJeff Garzik return; 1960c6fd2807SJeff Garzik ata_bus_reset(ap); 1961c6fd2807SJeff Garzik } 1962c6fd2807SJeff Garzik 1963c6fd2807SJeff Garzik /** 1964c6fd2807SJeff Garzik * ata_dev_pair - return other device on cable 1965c6fd2807SJeff Garzik * @adev: device 1966c6fd2807SJeff Garzik * 1967c6fd2807SJeff Garzik * Obtain the other device on the same cable, or if none is 1968c6fd2807SJeff Garzik * present NULL is returned 1969c6fd2807SJeff Garzik */ 1970c6fd2807SJeff Garzik 1971c6fd2807SJeff Garzik struct ata_device *ata_dev_pair(struct ata_device *adev) 1972c6fd2807SJeff Garzik { 1973c6fd2807SJeff Garzik struct ata_port *ap = adev->ap; 1974c6fd2807SJeff Garzik struct ata_device *pair = &ap->device[1 - adev->devno]; 1975c6fd2807SJeff Garzik if (!ata_dev_enabled(pair)) 1976c6fd2807SJeff Garzik return NULL; 1977c6fd2807SJeff Garzik return pair; 1978c6fd2807SJeff Garzik } 1979c6fd2807SJeff Garzik 1980c6fd2807SJeff Garzik /** 1981c6fd2807SJeff Garzik * ata_port_disable - Disable port. 1982c6fd2807SJeff Garzik * @ap: Port to be disabled. 1983c6fd2807SJeff Garzik * 1984c6fd2807SJeff Garzik * Modify @ap data structure such that the system 1985c6fd2807SJeff Garzik * thinks that the entire port is disabled, and should 1986c6fd2807SJeff Garzik * never attempt to probe or communicate with devices 1987c6fd2807SJeff Garzik * on this port. 1988c6fd2807SJeff Garzik * 1989cca3974eSJeff Garzik * LOCKING: host lock, or some other form of 1990c6fd2807SJeff Garzik * serialization. 1991c6fd2807SJeff Garzik */ 1992c6fd2807SJeff Garzik 1993c6fd2807SJeff Garzik void ata_port_disable(struct ata_port *ap) 1994c6fd2807SJeff Garzik { 1995c6fd2807SJeff Garzik ap->device[0].class = ATA_DEV_NONE; 1996c6fd2807SJeff Garzik ap->device[1].class = ATA_DEV_NONE; 1997c6fd2807SJeff Garzik ap->flags |= ATA_FLAG_DISABLED; 1998c6fd2807SJeff Garzik } 1999c6fd2807SJeff Garzik 2000c6fd2807SJeff Garzik /** 2001c6fd2807SJeff Garzik * sata_down_spd_limit - adjust SATA spd limit downward 2002c6fd2807SJeff Garzik * @ap: Port to adjust SATA spd limit for 2003c6fd2807SJeff Garzik * 2004c6fd2807SJeff Garzik * Adjust SATA spd limit of @ap downward. Note that this 2005c6fd2807SJeff Garzik * function only adjusts the limit. The change must be applied 2006c6fd2807SJeff Garzik * using sata_set_spd(). 2007c6fd2807SJeff Garzik * 2008c6fd2807SJeff Garzik * LOCKING: 2009c6fd2807SJeff Garzik * Inherited from caller. 2010c6fd2807SJeff Garzik * 2011c6fd2807SJeff Garzik * RETURNS: 2012c6fd2807SJeff Garzik * 0 on success, negative errno on failure 2013c6fd2807SJeff Garzik */ 2014c6fd2807SJeff Garzik int sata_down_spd_limit(struct ata_port *ap) 2015c6fd2807SJeff Garzik { 2016c6fd2807SJeff Garzik u32 sstatus, spd, mask; 2017c6fd2807SJeff Garzik int rc, highbit; 2018c6fd2807SJeff Garzik 2019c6fd2807SJeff Garzik rc = sata_scr_read(ap, SCR_STATUS, &sstatus); 2020c6fd2807SJeff Garzik if (rc) 2021c6fd2807SJeff Garzik return rc; 2022c6fd2807SJeff Garzik 2023c6fd2807SJeff Garzik mask = ap->sata_spd_limit; 2024c6fd2807SJeff Garzik if (mask <= 1) 2025c6fd2807SJeff Garzik return -EINVAL; 2026c6fd2807SJeff Garzik highbit = fls(mask) - 1; 2027c6fd2807SJeff Garzik mask &= ~(1 << highbit); 2028c6fd2807SJeff Garzik 2029c6fd2807SJeff Garzik spd = (sstatus >> 4) & 0xf; 2030c6fd2807SJeff Garzik if (spd <= 1) 2031c6fd2807SJeff Garzik return -EINVAL; 2032c6fd2807SJeff Garzik spd--; 2033c6fd2807SJeff Garzik mask &= (1 << spd) - 1; 2034c6fd2807SJeff Garzik if (!mask) 2035c6fd2807SJeff Garzik return -EINVAL; 2036c6fd2807SJeff Garzik 2037c6fd2807SJeff Garzik ap->sata_spd_limit = mask; 2038c6fd2807SJeff Garzik 2039c6fd2807SJeff Garzik ata_port_printk(ap, KERN_WARNING, "limiting SATA link speed to %s\n", 2040c6fd2807SJeff Garzik sata_spd_string(fls(mask))); 2041c6fd2807SJeff Garzik 2042c6fd2807SJeff Garzik return 0; 2043c6fd2807SJeff Garzik } 2044c6fd2807SJeff Garzik 2045c6fd2807SJeff Garzik static int __sata_set_spd_needed(struct ata_port *ap, u32 *scontrol) 2046c6fd2807SJeff Garzik { 2047c6fd2807SJeff Garzik u32 spd, limit; 2048c6fd2807SJeff Garzik 2049c6fd2807SJeff Garzik if (ap->sata_spd_limit == UINT_MAX) 2050c6fd2807SJeff Garzik limit = 0; 2051c6fd2807SJeff Garzik else 2052c6fd2807SJeff Garzik limit = fls(ap->sata_spd_limit); 2053c6fd2807SJeff Garzik 2054c6fd2807SJeff Garzik spd = (*scontrol >> 4) & 0xf; 2055c6fd2807SJeff Garzik *scontrol = (*scontrol & ~0xf0) | ((limit & 0xf) << 4); 2056c6fd2807SJeff Garzik 2057c6fd2807SJeff Garzik return spd != limit; 2058c6fd2807SJeff Garzik } 2059c6fd2807SJeff Garzik 2060c6fd2807SJeff Garzik /** 2061c6fd2807SJeff Garzik * sata_set_spd_needed - is SATA spd configuration needed 2062c6fd2807SJeff Garzik * @ap: Port in question 2063c6fd2807SJeff Garzik * 2064c6fd2807SJeff Garzik * Test whether the spd limit in SControl matches 2065c6fd2807SJeff Garzik * @ap->sata_spd_limit. This function is used to determine 2066c6fd2807SJeff Garzik * whether hardreset is necessary to apply SATA spd 2067c6fd2807SJeff Garzik * configuration. 2068c6fd2807SJeff Garzik * 2069c6fd2807SJeff Garzik * LOCKING: 2070c6fd2807SJeff Garzik * Inherited from caller. 2071c6fd2807SJeff Garzik * 2072c6fd2807SJeff Garzik * RETURNS: 2073c6fd2807SJeff Garzik * 1 if SATA spd configuration is needed, 0 otherwise. 2074c6fd2807SJeff Garzik */ 2075c6fd2807SJeff Garzik int sata_set_spd_needed(struct ata_port *ap) 2076c6fd2807SJeff Garzik { 2077c6fd2807SJeff Garzik u32 scontrol; 2078c6fd2807SJeff Garzik 2079c6fd2807SJeff Garzik if (sata_scr_read(ap, SCR_CONTROL, &scontrol)) 2080c6fd2807SJeff Garzik return 0; 2081c6fd2807SJeff Garzik 2082c6fd2807SJeff Garzik return __sata_set_spd_needed(ap, &scontrol); 2083c6fd2807SJeff Garzik } 2084c6fd2807SJeff Garzik 2085c6fd2807SJeff Garzik /** 2086c6fd2807SJeff Garzik * sata_set_spd - set SATA spd according to spd limit 2087c6fd2807SJeff Garzik * @ap: Port to set SATA spd for 2088c6fd2807SJeff Garzik * 2089c6fd2807SJeff Garzik * Set SATA spd of @ap according to sata_spd_limit. 2090c6fd2807SJeff Garzik * 2091c6fd2807SJeff Garzik * LOCKING: 2092c6fd2807SJeff Garzik * Inherited from caller. 2093c6fd2807SJeff Garzik * 2094c6fd2807SJeff Garzik * RETURNS: 2095c6fd2807SJeff Garzik * 0 if spd doesn't need to be changed, 1 if spd has been 2096c6fd2807SJeff Garzik * changed. Negative errno if SCR registers are inaccessible. 2097c6fd2807SJeff Garzik */ 2098c6fd2807SJeff Garzik int sata_set_spd(struct ata_port *ap) 2099c6fd2807SJeff Garzik { 2100c6fd2807SJeff Garzik u32 scontrol; 2101c6fd2807SJeff Garzik int rc; 2102c6fd2807SJeff Garzik 2103c6fd2807SJeff Garzik if ((rc = sata_scr_read(ap, SCR_CONTROL, &scontrol))) 2104c6fd2807SJeff Garzik return rc; 2105c6fd2807SJeff Garzik 2106c6fd2807SJeff Garzik if (!__sata_set_spd_needed(ap, &scontrol)) 2107c6fd2807SJeff Garzik return 0; 2108c6fd2807SJeff Garzik 2109c6fd2807SJeff Garzik if ((rc = sata_scr_write(ap, SCR_CONTROL, scontrol))) 2110c6fd2807SJeff Garzik return rc; 2111c6fd2807SJeff Garzik 2112c6fd2807SJeff Garzik return 1; 2113c6fd2807SJeff Garzik } 2114c6fd2807SJeff Garzik 2115c6fd2807SJeff Garzik /* 2116c6fd2807SJeff Garzik * This mode timing computation functionality is ported over from 2117c6fd2807SJeff Garzik * drivers/ide/ide-timing.h and was originally written by Vojtech Pavlik 2118c6fd2807SJeff Garzik */ 2119c6fd2807SJeff Garzik /* 2120b352e57dSAlan Cox * PIO 0-4, MWDMA 0-2 and UDMA 0-6 timings (in nanoseconds). 2121c6fd2807SJeff Garzik * These were taken from ATA/ATAPI-6 standard, rev 0a, except 2122b352e57dSAlan Cox * for UDMA6, which is currently supported only by Maxtor drives. 2123b352e57dSAlan Cox * 2124b352e57dSAlan Cox * For PIO 5/6 MWDMA 3/4 see the CFA specification 3.0. 2125c6fd2807SJeff Garzik */ 2126c6fd2807SJeff Garzik 2127c6fd2807SJeff Garzik static const struct ata_timing ata_timing[] = { 2128c6fd2807SJeff Garzik 2129c6fd2807SJeff Garzik { XFER_UDMA_6, 0, 0, 0, 0, 0, 0, 0, 15 }, 2130c6fd2807SJeff Garzik { XFER_UDMA_5, 0, 0, 0, 0, 0, 0, 0, 20 }, 2131c6fd2807SJeff Garzik { XFER_UDMA_4, 0, 0, 0, 0, 0, 0, 0, 30 }, 2132c6fd2807SJeff Garzik { XFER_UDMA_3, 0, 0, 0, 0, 0, 0, 0, 45 }, 2133c6fd2807SJeff Garzik 2134b352e57dSAlan Cox { XFER_MW_DMA_4, 25, 0, 0, 0, 55, 20, 80, 0 }, 2135b352e57dSAlan Cox { XFER_MW_DMA_3, 25, 0, 0, 0, 65, 25, 100, 0 }, 2136c6fd2807SJeff Garzik { XFER_UDMA_2, 0, 0, 0, 0, 0, 0, 0, 60 }, 2137c6fd2807SJeff Garzik { XFER_UDMA_1, 0, 0, 0, 0, 0, 0, 0, 80 }, 2138c6fd2807SJeff Garzik { XFER_UDMA_0, 0, 0, 0, 0, 0, 0, 0, 120 }, 2139c6fd2807SJeff Garzik 2140c6fd2807SJeff Garzik /* { XFER_UDMA_SLOW, 0, 0, 0, 0, 0, 0, 0, 150 }, */ 2141c6fd2807SJeff Garzik 2142c6fd2807SJeff Garzik { XFER_MW_DMA_2, 25, 0, 0, 0, 70, 25, 120, 0 }, 2143c6fd2807SJeff Garzik { XFER_MW_DMA_1, 45, 0, 0, 0, 80, 50, 150, 0 }, 2144c6fd2807SJeff Garzik { XFER_MW_DMA_0, 60, 0, 0, 0, 215, 215, 480, 0 }, 2145c6fd2807SJeff Garzik 2146c6fd2807SJeff Garzik { XFER_SW_DMA_2, 60, 0, 0, 0, 120, 120, 240, 0 }, 2147c6fd2807SJeff Garzik { XFER_SW_DMA_1, 90, 0, 0, 0, 240, 240, 480, 0 }, 2148c6fd2807SJeff Garzik { XFER_SW_DMA_0, 120, 0, 0, 0, 480, 480, 960, 0 }, 2149c6fd2807SJeff Garzik 2150b352e57dSAlan Cox { XFER_PIO_6, 10, 55, 20, 80, 55, 20, 80, 0 }, 2151b352e57dSAlan Cox { XFER_PIO_5, 15, 65, 25, 100, 65, 25, 100, 0 }, 2152c6fd2807SJeff Garzik { XFER_PIO_4, 25, 70, 25, 120, 70, 25, 120, 0 }, 2153c6fd2807SJeff Garzik { XFER_PIO_3, 30, 80, 70, 180, 80, 70, 180, 0 }, 2154c6fd2807SJeff Garzik 2155c6fd2807SJeff Garzik { XFER_PIO_2, 30, 290, 40, 330, 100, 90, 240, 0 }, 2156c6fd2807SJeff Garzik { XFER_PIO_1, 50, 290, 93, 383, 125, 100, 383, 0 }, 2157c6fd2807SJeff Garzik { XFER_PIO_0, 70, 290, 240, 600, 165, 150, 600, 0 }, 2158c6fd2807SJeff Garzik 2159c6fd2807SJeff Garzik /* { XFER_PIO_SLOW, 120, 290, 240, 960, 290, 240, 960, 0 }, */ 2160c6fd2807SJeff Garzik 2161c6fd2807SJeff Garzik { 0xFF } 2162c6fd2807SJeff Garzik }; 2163c6fd2807SJeff Garzik 2164c6fd2807SJeff Garzik #define ENOUGH(v,unit) (((v)-1)/(unit)+1) 2165c6fd2807SJeff Garzik #define EZ(v,unit) ((v)?ENOUGH(v,unit):0) 2166c6fd2807SJeff Garzik 2167c6fd2807SJeff Garzik static void ata_timing_quantize(const struct ata_timing *t, struct ata_timing *q, int T, int UT) 2168c6fd2807SJeff Garzik { 2169c6fd2807SJeff Garzik q->setup = EZ(t->setup * 1000, T); 2170c6fd2807SJeff Garzik q->act8b = EZ(t->act8b * 1000, T); 2171c6fd2807SJeff Garzik q->rec8b = EZ(t->rec8b * 1000, T); 2172c6fd2807SJeff Garzik q->cyc8b = EZ(t->cyc8b * 1000, T); 2173c6fd2807SJeff Garzik q->active = EZ(t->active * 1000, T); 2174c6fd2807SJeff Garzik q->recover = EZ(t->recover * 1000, T); 2175c6fd2807SJeff Garzik q->cycle = EZ(t->cycle * 1000, T); 2176c6fd2807SJeff Garzik q->udma = EZ(t->udma * 1000, UT); 2177c6fd2807SJeff Garzik } 2178c6fd2807SJeff Garzik 2179c6fd2807SJeff Garzik void ata_timing_merge(const struct ata_timing *a, const struct ata_timing *b, 2180c6fd2807SJeff Garzik struct ata_timing *m, unsigned int what) 2181c6fd2807SJeff Garzik { 2182c6fd2807SJeff Garzik if (what & ATA_TIMING_SETUP ) m->setup = max(a->setup, b->setup); 2183c6fd2807SJeff Garzik if (what & ATA_TIMING_ACT8B ) m->act8b = max(a->act8b, b->act8b); 2184c6fd2807SJeff Garzik if (what & ATA_TIMING_REC8B ) m->rec8b = max(a->rec8b, b->rec8b); 2185c6fd2807SJeff Garzik if (what & ATA_TIMING_CYC8B ) m->cyc8b = max(a->cyc8b, b->cyc8b); 2186c6fd2807SJeff Garzik if (what & ATA_TIMING_ACTIVE ) m->active = max(a->active, b->active); 2187c6fd2807SJeff Garzik if (what & ATA_TIMING_RECOVER) m->recover = max(a->recover, b->recover); 2188c6fd2807SJeff Garzik if (what & ATA_TIMING_CYCLE ) m->cycle = max(a->cycle, b->cycle); 2189c6fd2807SJeff Garzik if (what & ATA_TIMING_UDMA ) m->udma = max(a->udma, b->udma); 2190c6fd2807SJeff Garzik } 2191c6fd2807SJeff Garzik 2192c6fd2807SJeff Garzik static const struct ata_timing* ata_timing_find_mode(unsigned short speed) 2193c6fd2807SJeff Garzik { 2194c6fd2807SJeff Garzik const struct ata_timing *t; 2195c6fd2807SJeff Garzik 2196c6fd2807SJeff Garzik for (t = ata_timing; t->mode != speed; t++) 2197c6fd2807SJeff Garzik if (t->mode == 0xFF) 2198c6fd2807SJeff Garzik return NULL; 2199c6fd2807SJeff Garzik return t; 2200c6fd2807SJeff Garzik } 2201c6fd2807SJeff Garzik 2202c6fd2807SJeff Garzik int ata_timing_compute(struct ata_device *adev, unsigned short speed, 2203c6fd2807SJeff Garzik struct ata_timing *t, int T, int UT) 2204c6fd2807SJeff Garzik { 2205c6fd2807SJeff Garzik const struct ata_timing *s; 2206c6fd2807SJeff Garzik struct ata_timing p; 2207c6fd2807SJeff Garzik 2208c6fd2807SJeff Garzik /* 2209c6fd2807SJeff Garzik * Find the mode. 2210c6fd2807SJeff Garzik */ 2211c6fd2807SJeff Garzik 2212c6fd2807SJeff Garzik if (!(s = ata_timing_find_mode(speed))) 2213c6fd2807SJeff Garzik return -EINVAL; 2214c6fd2807SJeff Garzik 2215c6fd2807SJeff Garzik memcpy(t, s, sizeof(*s)); 2216c6fd2807SJeff Garzik 2217c6fd2807SJeff Garzik /* 2218c6fd2807SJeff Garzik * If the drive is an EIDE drive, it can tell us it needs extended 2219c6fd2807SJeff Garzik * PIO/MW_DMA cycle timing. 2220c6fd2807SJeff Garzik */ 2221c6fd2807SJeff Garzik 2222c6fd2807SJeff Garzik if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE drive */ 2223c6fd2807SJeff Garzik memset(&p, 0, sizeof(p)); 2224c6fd2807SJeff Garzik if(speed >= XFER_PIO_0 && speed <= XFER_SW_DMA_0) { 2225c6fd2807SJeff Garzik if (speed <= XFER_PIO_2) p.cycle = p.cyc8b = adev->id[ATA_ID_EIDE_PIO]; 2226c6fd2807SJeff Garzik else p.cycle = p.cyc8b = adev->id[ATA_ID_EIDE_PIO_IORDY]; 2227c6fd2807SJeff Garzik } else if(speed >= XFER_MW_DMA_0 && speed <= XFER_MW_DMA_2) { 2228c6fd2807SJeff Garzik p.cycle = adev->id[ATA_ID_EIDE_DMA_MIN]; 2229c6fd2807SJeff Garzik } 2230c6fd2807SJeff Garzik ata_timing_merge(&p, t, t, ATA_TIMING_CYCLE | ATA_TIMING_CYC8B); 2231c6fd2807SJeff Garzik } 2232c6fd2807SJeff Garzik 2233c6fd2807SJeff Garzik /* 2234c6fd2807SJeff Garzik * Convert the timing to bus clock counts. 2235c6fd2807SJeff Garzik */ 2236c6fd2807SJeff Garzik 2237c6fd2807SJeff Garzik ata_timing_quantize(t, t, T, UT); 2238c6fd2807SJeff Garzik 2239c6fd2807SJeff Garzik /* 2240c6fd2807SJeff Garzik * Even in DMA/UDMA modes we still use PIO access for IDENTIFY, 2241c6fd2807SJeff Garzik * S.M.A.R.T * and some other commands. We have to ensure that the 2242c6fd2807SJeff Garzik * DMA cycle timing is slower/equal than the fastest PIO timing. 2243c6fd2807SJeff Garzik */ 2244c6fd2807SJeff Garzik 2245fd3367afSAlan if (speed > XFER_PIO_6) { 2246c6fd2807SJeff Garzik ata_timing_compute(adev, adev->pio_mode, &p, T, UT); 2247c6fd2807SJeff Garzik ata_timing_merge(&p, t, t, ATA_TIMING_ALL); 2248c6fd2807SJeff Garzik } 2249c6fd2807SJeff Garzik 2250c6fd2807SJeff Garzik /* 2251c6fd2807SJeff Garzik * Lengthen active & recovery time so that cycle time is correct. 2252c6fd2807SJeff Garzik */ 2253c6fd2807SJeff Garzik 2254c6fd2807SJeff Garzik if (t->act8b + t->rec8b < t->cyc8b) { 2255c6fd2807SJeff Garzik t->act8b += (t->cyc8b - (t->act8b + t->rec8b)) / 2; 2256c6fd2807SJeff Garzik t->rec8b = t->cyc8b - t->act8b; 2257c6fd2807SJeff Garzik } 2258c6fd2807SJeff Garzik 2259c6fd2807SJeff Garzik if (t->active + t->recover < t->cycle) { 2260c6fd2807SJeff Garzik t->active += (t->cycle - (t->active + t->recover)) / 2; 2261c6fd2807SJeff Garzik t->recover = t->cycle - t->active; 2262c6fd2807SJeff Garzik } 2263c6fd2807SJeff Garzik 2264c6fd2807SJeff Garzik return 0; 2265c6fd2807SJeff Garzik } 2266c6fd2807SJeff Garzik 2267c6fd2807SJeff Garzik /** 2268c6fd2807SJeff Garzik * ata_down_xfermask_limit - adjust dev xfer masks downward 2269c6fd2807SJeff Garzik * @dev: Device to adjust xfer masks 2270c6fd2807SJeff Garzik * @force_pio0: Force PIO0 2271c6fd2807SJeff Garzik * 2272c6fd2807SJeff Garzik * Adjust xfer masks of @dev downward. Note that this function 2273c6fd2807SJeff Garzik * does not apply the change. Invoking ata_set_mode() afterwards 2274c6fd2807SJeff Garzik * will apply the limit. 2275c6fd2807SJeff Garzik * 2276c6fd2807SJeff Garzik * LOCKING: 2277c6fd2807SJeff Garzik * Inherited from caller. 2278c6fd2807SJeff Garzik * 2279c6fd2807SJeff Garzik * RETURNS: 2280c6fd2807SJeff Garzik * 0 on success, negative errno on failure 2281c6fd2807SJeff Garzik */ 2282c6fd2807SJeff Garzik int ata_down_xfermask_limit(struct ata_device *dev, int force_pio0) 2283c6fd2807SJeff Garzik { 2284c6fd2807SJeff Garzik unsigned long xfer_mask; 2285c6fd2807SJeff Garzik int highbit; 2286c6fd2807SJeff Garzik 2287c6fd2807SJeff Garzik xfer_mask = ata_pack_xfermask(dev->pio_mask, dev->mwdma_mask, 2288c6fd2807SJeff Garzik dev->udma_mask); 2289c6fd2807SJeff Garzik 2290c6fd2807SJeff Garzik if (!xfer_mask) 2291c6fd2807SJeff Garzik goto fail; 2292c6fd2807SJeff Garzik /* don't gear down to MWDMA from UDMA, go directly to PIO */ 2293c6fd2807SJeff Garzik if (xfer_mask & ATA_MASK_UDMA) 2294c6fd2807SJeff Garzik xfer_mask &= ~ATA_MASK_MWDMA; 2295c6fd2807SJeff Garzik 2296c6fd2807SJeff Garzik highbit = fls(xfer_mask) - 1; 2297c6fd2807SJeff Garzik xfer_mask &= ~(1 << highbit); 2298c6fd2807SJeff Garzik if (force_pio0) 2299c6fd2807SJeff Garzik xfer_mask &= 1 << ATA_SHIFT_PIO; 2300c6fd2807SJeff Garzik if (!xfer_mask) 2301c6fd2807SJeff Garzik goto fail; 2302c6fd2807SJeff Garzik 2303c6fd2807SJeff Garzik ata_unpack_xfermask(xfer_mask, &dev->pio_mask, &dev->mwdma_mask, 2304c6fd2807SJeff Garzik &dev->udma_mask); 2305c6fd2807SJeff Garzik 2306c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_WARNING, "limiting speed to %s\n", 2307c6fd2807SJeff Garzik ata_mode_string(xfer_mask)); 2308c6fd2807SJeff Garzik 2309c6fd2807SJeff Garzik return 0; 2310c6fd2807SJeff Garzik 2311c6fd2807SJeff Garzik fail: 2312c6fd2807SJeff Garzik return -EINVAL; 2313c6fd2807SJeff Garzik } 2314c6fd2807SJeff Garzik 2315c6fd2807SJeff Garzik static int ata_dev_set_mode(struct ata_device *dev) 2316c6fd2807SJeff Garzik { 2317baa1e78aSTejun Heo struct ata_eh_context *ehc = &dev->ap->eh_context; 2318c6fd2807SJeff Garzik unsigned int err_mask; 2319c6fd2807SJeff Garzik int rc; 2320c6fd2807SJeff Garzik 2321c6fd2807SJeff Garzik dev->flags &= ~ATA_DFLAG_PIO; 2322c6fd2807SJeff Garzik if (dev->xfer_shift == ATA_SHIFT_PIO) 2323c6fd2807SJeff Garzik dev->flags |= ATA_DFLAG_PIO; 2324c6fd2807SJeff Garzik 2325c6fd2807SJeff Garzik err_mask = ata_dev_set_xfermode(dev); 2326c6fd2807SJeff Garzik if (err_mask) { 2327c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_ERR, "failed to set xfermode " 2328c6fd2807SJeff Garzik "(err_mask=0x%x)\n", err_mask); 2329c6fd2807SJeff Garzik return -EIO; 2330c6fd2807SJeff Garzik } 2331c6fd2807SJeff Garzik 2332baa1e78aSTejun Heo ehc->i.flags |= ATA_EHI_POST_SETMODE; 2333c6fd2807SJeff Garzik rc = ata_dev_revalidate(dev, 0); 2334baa1e78aSTejun Heo ehc->i.flags &= ~ATA_EHI_POST_SETMODE; 2335c6fd2807SJeff Garzik if (rc) 2336c6fd2807SJeff Garzik return rc; 2337c6fd2807SJeff Garzik 2338c6fd2807SJeff Garzik DPRINTK("xfer_shift=%u, xfer_mode=0x%x\n", 2339c6fd2807SJeff Garzik dev->xfer_shift, (int)dev->xfer_mode); 2340c6fd2807SJeff Garzik 2341c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_INFO, "configured for %s\n", 2342c6fd2807SJeff Garzik ata_mode_string(ata_xfer_mode2mask(dev->xfer_mode))); 2343c6fd2807SJeff Garzik return 0; 2344c6fd2807SJeff Garzik } 2345c6fd2807SJeff Garzik 2346c6fd2807SJeff Garzik /** 2347c6fd2807SJeff Garzik * ata_set_mode - Program timings and issue SET FEATURES - XFER 2348c6fd2807SJeff Garzik * @ap: port on which timings will be programmed 2349c6fd2807SJeff Garzik * @r_failed_dev: out paramter for failed device 2350c6fd2807SJeff Garzik * 2351c6fd2807SJeff Garzik * Set ATA device disk transfer mode (PIO3, UDMA6, etc.). If 2352c6fd2807SJeff Garzik * ata_set_mode() fails, pointer to the failing device is 2353c6fd2807SJeff Garzik * returned in @r_failed_dev. 2354c6fd2807SJeff Garzik * 2355c6fd2807SJeff Garzik * LOCKING: 2356c6fd2807SJeff Garzik * PCI/etc. bus probe sem. 2357c6fd2807SJeff Garzik * 2358c6fd2807SJeff Garzik * RETURNS: 2359c6fd2807SJeff Garzik * 0 on success, negative errno otherwise 2360c6fd2807SJeff Garzik */ 2361c6fd2807SJeff Garzik int ata_set_mode(struct ata_port *ap, struct ata_device **r_failed_dev) 2362c6fd2807SJeff Garzik { 2363c6fd2807SJeff Garzik struct ata_device *dev; 2364c6fd2807SJeff Garzik int i, rc = 0, used_dma = 0, found = 0; 2365c6fd2807SJeff Garzik 2366c6fd2807SJeff Garzik /* has private set_mode? */ 2367b229a7b0SAlan if (ap->ops->set_mode) 2368b229a7b0SAlan return ap->ops->set_mode(ap, r_failed_dev); 2369c6fd2807SJeff Garzik 2370c6fd2807SJeff Garzik /* step 1: calculate xfer_mask */ 2371c6fd2807SJeff Garzik for (i = 0; i < ATA_MAX_DEVICES; i++) { 2372c6fd2807SJeff Garzik unsigned int pio_mask, dma_mask; 2373c6fd2807SJeff Garzik 2374c6fd2807SJeff Garzik dev = &ap->device[i]; 2375c6fd2807SJeff Garzik 2376c6fd2807SJeff Garzik if (!ata_dev_enabled(dev)) 2377c6fd2807SJeff Garzik continue; 2378c6fd2807SJeff Garzik 2379c6fd2807SJeff Garzik ata_dev_xfermask(dev); 2380c6fd2807SJeff Garzik 2381c6fd2807SJeff Garzik pio_mask = ata_pack_xfermask(dev->pio_mask, 0, 0); 2382c6fd2807SJeff Garzik dma_mask = ata_pack_xfermask(0, dev->mwdma_mask, dev->udma_mask); 2383c6fd2807SJeff Garzik dev->pio_mode = ata_xfer_mask2mode(pio_mask); 2384c6fd2807SJeff Garzik dev->dma_mode = ata_xfer_mask2mode(dma_mask); 2385c6fd2807SJeff Garzik 2386c6fd2807SJeff Garzik found = 1; 2387c6fd2807SJeff Garzik if (dev->dma_mode) 2388c6fd2807SJeff Garzik used_dma = 1; 2389c6fd2807SJeff Garzik } 2390c6fd2807SJeff Garzik if (!found) 2391c6fd2807SJeff Garzik goto out; 2392c6fd2807SJeff Garzik 2393c6fd2807SJeff Garzik /* step 2: always set host PIO timings */ 2394c6fd2807SJeff Garzik for (i = 0; i < ATA_MAX_DEVICES; i++) { 2395c6fd2807SJeff Garzik dev = &ap->device[i]; 2396c6fd2807SJeff Garzik if (!ata_dev_enabled(dev)) 2397c6fd2807SJeff Garzik continue; 2398c6fd2807SJeff Garzik 2399c6fd2807SJeff Garzik if (!dev->pio_mode) { 2400c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_WARNING, "no PIO support\n"); 2401c6fd2807SJeff Garzik rc = -EINVAL; 2402c6fd2807SJeff Garzik goto out; 2403c6fd2807SJeff Garzik } 2404c6fd2807SJeff Garzik 2405c6fd2807SJeff Garzik dev->xfer_mode = dev->pio_mode; 2406c6fd2807SJeff Garzik dev->xfer_shift = ATA_SHIFT_PIO; 2407c6fd2807SJeff Garzik if (ap->ops->set_piomode) 2408c6fd2807SJeff Garzik ap->ops->set_piomode(ap, dev); 2409c6fd2807SJeff Garzik } 2410c6fd2807SJeff Garzik 2411c6fd2807SJeff Garzik /* step 3: set host DMA timings */ 2412c6fd2807SJeff Garzik for (i = 0; i < ATA_MAX_DEVICES; i++) { 2413c6fd2807SJeff Garzik dev = &ap->device[i]; 2414c6fd2807SJeff Garzik 2415c6fd2807SJeff Garzik if (!ata_dev_enabled(dev) || !dev->dma_mode) 2416c6fd2807SJeff Garzik continue; 2417c6fd2807SJeff Garzik 2418c6fd2807SJeff Garzik dev->xfer_mode = dev->dma_mode; 2419c6fd2807SJeff Garzik dev->xfer_shift = ata_xfer_mode2shift(dev->dma_mode); 2420c6fd2807SJeff Garzik if (ap->ops->set_dmamode) 2421c6fd2807SJeff Garzik ap->ops->set_dmamode(ap, dev); 2422c6fd2807SJeff Garzik } 2423c6fd2807SJeff Garzik 2424c6fd2807SJeff Garzik /* step 4: update devices' xfer mode */ 2425c6fd2807SJeff Garzik for (i = 0; i < ATA_MAX_DEVICES; i++) { 2426c6fd2807SJeff Garzik dev = &ap->device[i]; 2427c6fd2807SJeff Garzik 242818d90debSAlan /* don't update suspended devices' xfer mode */ 2429c6fd2807SJeff Garzik if (!ata_dev_ready(dev)) 2430c6fd2807SJeff Garzik continue; 2431c6fd2807SJeff Garzik 2432c6fd2807SJeff Garzik rc = ata_dev_set_mode(dev); 2433c6fd2807SJeff Garzik if (rc) 2434c6fd2807SJeff Garzik goto out; 2435c6fd2807SJeff Garzik } 2436c6fd2807SJeff Garzik 2437c6fd2807SJeff Garzik /* Record simplex status. If we selected DMA then the other 2438c6fd2807SJeff Garzik * host channels are not permitted to do so. 2439c6fd2807SJeff Garzik */ 2440cca3974eSJeff Garzik if (used_dma && (ap->host->flags & ATA_HOST_SIMPLEX)) 2441cca3974eSJeff Garzik ap->host->simplex_claimed = 1; 2442c6fd2807SJeff Garzik 2443c6fd2807SJeff Garzik /* step5: chip specific finalisation */ 2444c6fd2807SJeff Garzik if (ap->ops->post_set_mode) 2445c6fd2807SJeff Garzik ap->ops->post_set_mode(ap); 2446c6fd2807SJeff Garzik 2447c6fd2807SJeff Garzik out: 2448c6fd2807SJeff Garzik if (rc) 2449c6fd2807SJeff Garzik *r_failed_dev = dev; 2450c6fd2807SJeff Garzik return rc; 2451c6fd2807SJeff Garzik } 2452c6fd2807SJeff Garzik 2453c6fd2807SJeff Garzik /** 2454c6fd2807SJeff Garzik * ata_tf_to_host - issue ATA taskfile to host controller 2455c6fd2807SJeff Garzik * @ap: port to which command is being issued 2456c6fd2807SJeff Garzik * @tf: ATA taskfile register set 2457c6fd2807SJeff Garzik * 2458c6fd2807SJeff Garzik * Issues ATA taskfile register set to ATA host controller, 2459c6fd2807SJeff Garzik * with proper synchronization with interrupt handler and 2460c6fd2807SJeff Garzik * other threads. 2461c6fd2807SJeff Garzik * 2462c6fd2807SJeff Garzik * LOCKING: 2463cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 2464c6fd2807SJeff Garzik */ 2465c6fd2807SJeff Garzik 2466c6fd2807SJeff Garzik static inline void ata_tf_to_host(struct ata_port *ap, 2467c6fd2807SJeff Garzik const struct ata_taskfile *tf) 2468c6fd2807SJeff Garzik { 2469c6fd2807SJeff Garzik ap->ops->tf_load(ap, tf); 2470c6fd2807SJeff Garzik ap->ops->exec_command(ap, tf); 2471c6fd2807SJeff Garzik } 2472c6fd2807SJeff Garzik 2473c6fd2807SJeff Garzik /** 2474c6fd2807SJeff Garzik * ata_busy_sleep - sleep until BSY clears, or timeout 2475c6fd2807SJeff Garzik * @ap: port containing status register to be polled 2476c6fd2807SJeff Garzik * @tmout_pat: impatience timeout 2477c6fd2807SJeff Garzik * @tmout: overall timeout 2478c6fd2807SJeff Garzik * 2479c6fd2807SJeff Garzik * Sleep until ATA Status register bit BSY clears, 2480c6fd2807SJeff Garzik * or a timeout occurs. 2481c6fd2807SJeff Garzik * 2482d1adc1bbSTejun Heo * LOCKING: 2483d1adc1bbSTejun Heo * Kernel thread context (may sleep). 2484d1adc1bbSTejun Heo * 2485d1adc1bbSTejun Heo * RETURNS: 2486d1adc1bbSTejun Heo * 0 on success, -errno otherwise. 2487c6fd2807SJeff Garzik */ 2488d1adc1bbSTejun Heo int ata_busy_sleep(struct ata_port *ap, 2489c6fd2807SJeff Garzik unsigned long tmout_pat, unsigned long tmout) 2490c6fd2807SJeff Garzik { 2491c6fd2807SJeff Garzik unsigned long timer_start, timeout; 2492c6fd2807SJeff Garzik u8 status; 2493c6fd2807SJeff Garzik 2494c6fd2807SJeff Garzik status = ata_busy_wait(ap, ATA_BUSY, 300); 2495c6fd2807SJeff Garzik timer_start = jiffies; 2496c6fd2807SJeff Garzik timeout = timer_start + tmout_pat; 2497d1adc1bbSTejun Heo while (status != 0xff && (status & ATA_BUSY) && 2498d1adc1bbSTejun Heo time_before(jiffies, timeout)) { 2499c6fd2807SJeff Garzik msleep(50); 2500c6fd2807SJeff Garzik status = ata_busy_wait(ap, ATA_BUSY, 3); 2501c6fd2807SJeff Garzik } 2502c6fd2807SJeff Garzik 2503d1adc1bbSTejun Heo if (status != 0xff && (status & ATA_BUSY)) 2504c6fd2807SJeff Garzik ata_port_printk(ap, KERN_WARNING, 250535aa7a43SJeff Garzik "port is slow to respond, please be patient " 250635aa7a43SJeff Garzik "(Status 0x%x)\n", status); 2507c6fd2807SJeff Garzik 2508c6fd2807SJeff Garzik timeout = timer_start + tmout; 2509d1adc1bbSTejun Heo while (status != 0xff && (status & ATA_BUSY) && 2510d1adc1bbSTejun Heo time_before(jiffies, timeout)) { 2511c6fd2807SJeff Garzik msleep(50); 2512c6fd2807SJeff Garzik status = ata_chk_status(ap); 2513c6fd2807SJeff Garzik } 2514c6fd2807SJeff Garzik 2515d1adc1bbSTejun Heo if (status == 0xff) 2516d1adc1bbSTejun Heo return -ENODEV; 2517d1adc1bbSTejun Heo 2518c6fd2807SJeff Garzik if (status & ATA_BUSY) { 2519c6fd2807SJeff Garzik ata_port_printk(ap, KERN_ERR, "port failed to respond " 252035aa7a43SJeff Garzik "(%lu secs, Status 0x%x)\n", 252135aa7a43SJeff Garzik tmout / HZ, status); 2522d1adc1bbSTejun Heo return -EBUSY; 2523c6fd2807SJeff Garzik } 2524c6fd2807SJeff Garzik 2525c6fd2807SJeff Garzik return 0; 2526c6fd2807SJeff Garzik } 2527c6fd2807SJeff Garzik 2528c6fd2807SJeff Garzik static void ata_bus_post_reset(struct ata_port *ap, unsigned int devmask) 2529c6fd2807SJeff Garzik { 2530c6fd2807SJeff Garzik struct ata_ioports *ioaddr = &ap->ioaddr; 2531c6fd2807SJeff Garzik unsigned int dev0 = devmask & (1 << 0); 2532c6fd2807SJeff Garzik unsigned int dev1 = devmask & (1 << 1); 2533c6fd2807SJeff Garzik unsigned long timeout; 2534c6fd2807SJeff Garzik 2535c6fd2807SJeff Garzik /* if device 0 was found in ata_devchk, wait for its 2536c6fd2807SJeff Garzik * BSY bit to clear 2537c6fd2807SJeff Garzik */ 2538c6fd2807SJeff Garzik if (dev0) 2539c6fd2807SJeff Garzik ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT); 2540c6fd2807SJeff Garzik 2541c6fd2807SJeff Garzik /* if device 1 was found in ata_devchk, wait for 2542c6fd2807SJeff Garzik * register access, then wait for BSY to clear 2543c6fd2807SJeff Garzik */ 2544c6fd2807SJeff Garzik timeout = jiffies + ATA_TMOUT_BOOT; 2545c6fd2807SJeff Garzik while (dev1) { 2546c6fd2807SJeff Garzik u8 nsect, lbal; 2547c6fd2807SJeff Garzik 2548c6fd2807SJeff Garzik ap->ops->dev_select(ap, 1); 25490d5ff566STejun Heo nsect = ioread8(ioaddr->nsect_addr); 25500d5ff566STejun Heo lbal = ioread8(ioaddr->lbal_addr); 2551c6fd2807SJeff Garzik if ((nsect == 1) && (lbal == 1)) 2552c6fd2807SJeff Garzik break; 2553c6fd2807SJeff Garzik if (time_after(jiffies, timeout)) { 2554c6fd2807SJeff Garzik dev1 = 0; 2555c6fd2807SJeff Garzik break; 2556c6fd2807SJeff Garzik } 2557c6fd2807SJeff Garzik msleep(50); /* give drive a breather */ 2558c6fd2807SJeff Garzik } 2559c6fd2807SJeff Garzik if (dev1) 2560c6fd2807SJeff Garzik ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT); 2561c6fd2807SJeff Garzik 2562c6fd2807SJeff Garzik /* is all this really necessary? */ 2563c6fd2807SJeff Garzik ap->ops->dev_select(ap, 0); 2564c6fd2807SJeff Garzik if (dev1) 2565c6fd2807SJeff Garzik ap->ops->dev_select(ap, 1); 2566c6fd2807SJeff Garzik if (dev0) 2567c6fd2807SJeff Garzik ap->ops->dev_select(ap, 0); 2568c6fd2807SJeff Garzik } 2569c6fd2807SJeff Garzik 2570c6fd2807SJeff Garzik static unsigned int ata_bus_softreset(struct ata_port *ap, 2571c6fd2807SJeff Garzik unsigned int devmask) 2572c6fd2807SJeff Garzik { 2573c6fd2807SJeff Garzik struct ata_ioports *ioaddr = &ap->ioaddr; 2574c6fd2807SJeff Garzik 2575c6fd2807SJeff Garzik DPRINTK("ata%u: bus reset via SRST\n", ap->id); 2576c6fd2807SJeff Garzik 2577c6fd2807SJeff Garzik /* software reset. causes dev0 to be selected */ 25780d5ff566STejun Heo iowrite8(ap->ctl, ioaddr->ctl_addr); 2579c6fd2807SJeff Garzik udelay(20); /* FIXME: flush */ 25800d5ff566STejun Heo iowrite8(ap->ctl | ATA_SRST, ioaddr->ctl_addr); 2581c6fd2807SJeff Garzik udelay(20); /* FIXME: flush */ 25820d5ff566STejun Heo iowrite8(ap->ctl, ioaddr->ctl_addr); 2583c6fd2807SJeff Garzik 2584c6fd2807SJeff Garzik /* spec mandates ">= 2ms" before checking status. 2585c6fd2807SJeff Garzik * We wait 150ms, because that was the magic delay used for 2586c6fd2807SJeff Garzik * ATAPI devices in Hale Landis's ATADRVR, for the period of time 2587c6fd2807SJeff Garzik * between when the ATA command register is written, and then 2588c6fd2807SJeff Garzik * status is checked. Because waiting for "a while" before 2589c6fd2807SJeff Garzik * checking status is fine, post SRST, we perform this magic 2590c6fd2807SJeff Garzik * delay here as well. 2591c6fd2807SJeff Garzik * 2592c6fd2807SJeff Garzik * Old drivers/ide uses the 2mS rule and then waits for ready 2593c6fd2807SJeff Garzik */ 2594c6fd2807SJeff Garzik msleep(150); 2595c6fd2807SJeff Garzik 2596c6fd2807SJeff Garzik /* Before we perform post reset processing we want to see if 2597c6fd2807SJeff Garzik * the bus shows 0xFF because the odd clown forgets the D7 2598c6fd2807SJeff Garzik * pulldown resistor. 2599c6fd2807SJeff Garzik */ 2600d1adc1bbSTejun Heo if (ata_check_status(ap) == 0xFF) 2601d1adc1bbSTejun Heo return 0; 2602c6fd2807SJeff Garzik 2603c6fd2807SJeff Garzik ata_bus_post_reset(ap, devmask); 2604c6fd2807SJeff Garzik 2605c6fd2807SJeff Garzik return 0; 2606c6fd2807SJeff Garzik } 2607c6fd2807SJeff Garzik 2608c6fd2807SJeff Garzik /** 2609c6fd2807SJeff Garzik * ata_bus_reset - reset host port and associated ATA channel 2610c6fd2807SJeff Garzik * @ap: port to reset 2611c6fd2807SJeff Garzik * 2612c6fd2807SJeff Garzik * This is typically the first time we actually start issuing 2613c6fd2807SJeff Garzik * commands to the ATA channel. We wait for BSY to clear, then 2614c6fd2807SJeff Garzik * issue EXECUTE DEVICE DIAGNOSTIC command, polling for its 2615c6fd2807SJeff Garzik * result. Determine what devices, if any, are on the channel 2616c6fd2807SJeff Garzik * by looking at the device 0/1 error register. Look at the signature 2617c6fd2807SJeff Garzik * stored in each device's taskfile registers, to determine if 2618c6fd2807SJeff Garzik * the device is ATA or ATAPI. 2619c6fd2807SJeff Garzik * 2620c6fd2807SJeff Garzik * LOCKING: 2621c6fd2807SJeff Garzik * PCI/etc. bus probe sem. 2622cca3974eSJeff Garzik * Obtains host lock. 2623c6fd2807SJeff Garzik * 2624c6fd2807SJeff Garzik * SIDE EFFECTS: 2625c6fd2807SJeff Garzik * Sets ATA_FLAG_DISABLED if bus reset fails. 2626c6fd2807SJeff Garzik */ 2627c6fd2807SJeff Garzik 2628c6fd2807SJeff Garzik void ata_bus_reset(struct ata_port *ap) 2629c6fd2807SJeff Garzik { 2630c6fd2807SJeff Garzik struct ata_ioports *ioaddr = &ap->ioaddr; 2631c6fd2807SJeff Garzik unsigned int slave_possible = ap->flags & ATA_FLAG_SLAVE_POSS; 2632c6fd2807SJeff Garzik u8 err; 2633c6fd2807SJeff Garzik unsigned int dev0, dev1 = 0, devmask = 0; 2634c6fd2807SJeff Garzik 2635c6fd2807SJeff Garzik DPRINTK("ENTER, host %u, port %u\n", ap->id, ap->port_no); 2636c6fd2807SJeff Garzik 2637c6fd2807SJeff Garzik /* determine if device 0/1 are present */ 2638c6fd2807SJeff Garzik if (ap->flags & ATA_FLAG_SATA_RESET) 2639c6fd2807SJeff Garzik dev0 = 1; 2640c6fd2807SJeff Garzik else { 2641c6fd2807SJeff Garzik dev0 = ata_devchk(ap, 0); 2642c6fd2807SJeff Garzik if (slave_possible) 2643c6fd2807SJeff Garzik dev1 = ata_devchk(ap, 1); 2644c6fd2807SJeff Garzik } 2645c6fd2807SJeff Garzik 2646c6fd2807SJeff Garzik if (dev0) 2647c6fd2807SJeff Garzik devmask |= (1 << 0); 2648c6fd2807SJeff Garzik if (dev1) 2649c6fd2807SJeff Garzik devmask |= (1 << 1); 2650c6fd2807SJeff Garzik 2651c6fd2807SJeff Garzik /* select device 0 again */ 2652c6fd2807SJeff Garzik ap->ops->dev_select(ap, 0); 2653c6fd2807SJeff Garzik 2654c6fd2807SJeff Garzik /* issue bus reset */ 2655c6fd2807SJeff Garzik if (ap->flags & ATA_FLAG_SRST) 2656c6fd2807SJeff Garzik if (ata_bus_softreset(ap, devmask)) 2657c6fd2807SJeff Garzik goto err_out; 2658c6fd2807SJeff Garzik 2659c6fd2807SJeff Garzik /* 2660c6fd2807SJeff Garzik * determine by signature whether we have ATA or ATAPI devices 2661c6fd2807SJeff Garzik */ 2662c6fd2807SJeff Garzik ap->device[0].class = ata_dev_try_classify(ap, 0, &err); 2663c6fd2807SJeff Garzik if ((slave_possible) && (err != 0x81)) 2664c6fd2807SJeff Garzik ap->device[1].class = ata_dev_try_classify(ap, 1, &err); 2665c6fd2807SJeff Garzik 2666c6fd2807SJeff Garzik /* re-enable interrupts */ 2667c6fd2807SJeff Garzik if (ap->ioaddr.ctl_addr) /* FIXME: hack. create a hook instead */ 2668c6fd2807SJeff Garzik ata_irq_on(ap); 2669c6fd2807SJeff Garzik 2670c6fd2807SJeff Garzik /* is double-select really necessary? */ 2671c6fd2807SJeff Garzik if (ap->device[1].class != ATA_DEV_NONE) 2672c6fd2807SJeff Garzik ap->ops->dev_select(ap, 1); 2673c6fd2807SJeff Garzik if (ap->device[0].class != ATA_DEV_NONE) 2674c6fd2807SJeff Garzik ap->ops->dev_select(ap, 0); 2675c6fd2807SJeff Garzik 2676c6fd2807SJeff Garzik /* if no devices were detected, disable this port */ 2677c6fd2807SJeff Garzik if ((ap->device[0].class == ATA_DEV_NONE) && 2678c6fd2807SJeff Garzik (ap->device[1].class == ATA_DEV_NONE)) 2679c6fd2807SJeff Garzik goto err_out; 2680c6fd2807SJeff Garzik 2681c6fd2807SJeff Garzik if (ap->flags & (ATA_FLAG_SATA_RESET | ATA_FLAG_SRST)) { 2682c6fd2807SJeff Garzik /* set up device control for ATA_FLAG_SATA_RESET */ 26830d5ff566STejun Heo iowrite8(ap->ctl, ioaddr->ctl_addr); 2684c6fd2807SJeff Garzik } 2685c6fd2807SJeff Garzik 2686c6fd2807SJeff Garzik DPRINTK("EXIT\n"); 2687c6fd2807SJeff Garzik return; 2688c6fd2807SJeff Garzik 2689c6fd2807SJeff Garzik err_out: 2690c6fd2807SJeff Garzik ata_port_printk(ap, KERN_ERR, "disabling port\n"); 2691c6fd2807SJeff Garzik ap->ops->port_disable(ap); 2692c6fd2807SJeff Garzik 2693c6fd2807SJeff Garzik DPRINTK("EXIT\n"); 2694c6fd2807SJeff Garzik } 2695c6fd2807SJeff Garzik 2696c6fd2807SJeff Garzik /** 2697c6fd2807SJeff Garzik * sata_phy_debounce - debounce SATA phy status 2698c6fd2807SJeff Garzik * @ap: ATA port to debounce SATA phy status for 2699c6fd2807SJeff Garzik * @params: timing parameters { interval, duratinon, timeout } in msec 2700c6fd2807SJeff Garzik * 2701c6fd2807SJeff Garzik * Make sure SStatus of @ap reaches stable state, determined by 2702c6fd2807SJeff Garzik * holding the same value where DET is not 1 for @duration polled 2703c6fd2807SJeff Garzik * every @interval, before @timeout. Timeout constraints the 2704c6fd2807SJeff Garzik * beginning of the stable state. Because, after hot unplugging, 2705c6fd2807SJeff Garzik * DET gets stuck at 1 on some controllers, this functions waits 2706c6fd2807SJeff Garzik * until timeout then returns 0 if DET is stable at 1. 2707c6fd2807SJeff Garzik * 2708c6fd2807SJeff Garzik * LOCKING: 2709c6fd2807SJeff Garzik * Kernel thread context (may sleep) 2710c6fd2807SJeff Garzik * 2711c6fd2807SJeff Garzik * RETURNS: 2712c6fd2807SJeff Garzik * 0 on success, -errno on failure. 2713c6fd2807SJeff Garzik */ 2714c6fd2807SJeff Garzik int sata_phy_debounce(struct ata_port *ap, const unsigned long *params) 2715c6fd2807SJeff Garzik { 2716c6fd2807SJeff Garzik unsigned long interval_msec = params[0]; 2717c6fd2807SJeff Garzik unsigned long duration = params[1] * HZ / 1000; 2718c6fd2807SJeff Garzik unsigned long timeout = jiffies + params[2] * HZ / 1000; 2719c6fd2807SJeff Garzik unsigned long last_jiffies; 2720c6fd2807SJeff Garzik u32 last, cur; 2721c6fd2807SJeff Garzik int rc; 2722c6fd2807SJeff Garzik 2723c6fd2807SJeff Garzik if ((rc = sata_scr_read(ap, SCR_STATUS, &cur))) 2724c6fd2807SJeff Garzik return rc; 2725c6fd2807SJeff Garzik cur &= 0xf; 2726c6fd2807SJeff Garzik 2727c6fd2807SJeff Garzik last = cur; 2728c6fd2807SJeff Garzik last_jiffies = jiffies; 2729c6fd2807SJeff Garzik 2730c6fd2807SJeff Garzik while (1) { 2731c6fd2807SJeff Garzik msleep(interval_msec); 2732c6fd2807SJeff Garzik if ((rc = sata_scr_read(ap, SCR_STATUS, &cur))) 2733c6fd2807SJeff Garzik return rc; 2734c6fd2807SJeff Garzik cur &= 0xf; 2735c6fd2807SJeff Garzik 2736c6fd2807SJeff Garzik /* DET stable? */ 2737c6fd2807SJeff Garzik if (cur == last) { 2738c6fd2807SJeff Garzik if (cur == 1 && time_before(jiffies, timeout)) 2739c6fd2807SJeff Garzik continue; 2740c6fd2807SJeff Garzik if (time_after(jiffies, last_jiffies + duration)) 2741c6fd2807SJeff Garzik return 0; 2742c6fd2807SJeff Garzik continue; 2743c6fd2807SJeff Garzik } 2744c6fd2807SJeff Garzik 2745c6fd2807SJeff Garzik /* unstable, start over */ 2746c6fd2807SJeff Garzik last = cur; 2747c6fd2807SJeff Garzik last_jiffies = jiffies; 2748c6fd2807SJeff Garzik 2749c6fd2807SJeff Garzik /* check timeout */ 2750c6fd2807SJeff Garzik if (time_after(jiffies, timeout)) 2751c6fd2807SJeff Garzik return -EBUSY; 2752c6fd2807SJeff Garzik } 2753c6fd2807SJeff Garzik } 2754c6fd2807SJeff Garzik 2755c6fd2807SJeff Garzik /** 2756c6fd2807SJeff Garzik * sata_phy_resume - resume SATA phy 2757c6fd2807SJeff Garzik * @ap: ATA port to resume SATA phy for 2758c6fd2807SJeff Garzik * @params: timing parameters { interval, duratinon, timeout } in msec 2759c6fd2807SJeff Garzik * 2760c6fd2807SJeff Garzik * Resume SATA phy of @ap and debounce it. 2761c6fd2807SJeff Garzik * 2762c6fd2807SJeff Garzik * LOCKING: 2763c6fd2807SJeff Garzik * Kernel thread context (may sleep) 2764c6fd2807SJeff Garzik * 2765c6fd2807SJeff Garzik * RETURNS: 2766c6fd2807SJeff Garzik * 0 on success, -errno on failure. 2767c6fd2807SJeff Garzik */ 2768c6fd2807SJeff Garzik int sata_phy_resume(struct ata_port *ap, const unsigned long *params) 2769c6fd2807SJeff Garzik { 2770c6fd2807SJeff Garzik u32 scontrol; 2771c6fd2807SJeff Garzik int rc; 2772c6fd2807SJeff Garzik 2773c6fd2807SJeff Garzik if ((rc = sata_scr_read(ap, SCR_CONTROL, &scontrol))) 2774c6fd2807SJeff Garzik return rc; 2775c6fd2807SJeff Garzik 2776c6fd2807SJeff Garzik scontrol = (scontrol & 0x0f0) | 0x300; 2777c6fd2807SJeff Garzik 2778c6fd2807SJeff Garzik if ((rc = sata_scr_write(ap, SCR_CONTROL, scontrol))) 2779c6fd2807SJeff Garzik return rc; 2780c6fd2807SJeff Garzik 2781c6fd2807SJeff Garzik /* Some PHYs react badly if SStatus is pounded immediately 2782c6fd2807SJeff Garzik * after resuming. Delay 200ms before debouncing. 2783c6fd2807SJeff Garzik */ 2784c6fd2807SJeff Garzik msleep(200); 2785c6fd2807SJeff Garzik 2786c6fd2807SJeff Garzik return sata_phy_debounce(ap, params); 2787c6fd2807SJeff Garzik } 2788c6fd2807SJeff Garzik 2789c6fd2807SJeff Garzik static void ata_wait_spinup(struct ata_port *ap) 2790c6fd2807SJeff Garzik { 2791c6fd2807SJeff Garzik struct ata_eh_context *ehc = &ap->eh_context; 2792c6fd2807SJeff Garzik unsigned long end, secs; 2793c6fd2807SJeff Garzik int rc; 2794c6fd2807SJeff Garzik 2795c6fd2807SJeff Garzik /* first, debounce phy if SATA */ 2796c6fd2807SJeff Garzik if (ap->cbl == ATA_CBL_SATA) { 2797c6fd2807SJeff Garzik rc = sata_phy_debounce(ap, sata_deb_timing_hotplug); 2798c6fd2807SJeff Garzik 2799c6fd2807SJeff Garzik /* if debounced successfully and offline, no need to wait */ 2800c6fd2807SJeff Garzik if ((rc == 0 || rc == -EOPNOTSUPP) && ata_port_offline(ap)) 2801c6fd2807SJeff Garzik return; 2802c6fd2807SJeff Garzik } 2803c6fd2807SJeff Garzik 2804c6fd2807SJeff Garzik /* okay, let's give the drive time to spin up */ 2805c6fd2807SJeff Garzik end = ehc->i.hotplug_timestamp + ATA_SPINUP_WAIT * HZ / 1000; 2806c6fd2807SJeff Garzik secs = ((end - jiffies) + HZ - 1) / HZ; 2807c6fd2807SJeff Garzik 2808c6fd2807SJeff Garzik if (time_after(jiffies, end)) 2809c6fd2807SJeff Garzik return; 2810c6fd2807SJeff Garzik 2811c6fd2807SJeff Garzik if (secs > 5) 2812c6fd2807SJeff Garzik ata_port_printk(ap, KERN_INFO, "waiting for device to spin up " 2813c6fd2807SJeff Garzik "(%lu secs)\n", secs); 2814c6fd2807SJeff Garzik 2815c6fd2807SJeff Garzik schedule_timeout_uninterruptible(end - jiffies); 2816c6fd2807SJeff Garzik } 2817c6fd2807SJeff Garzik 2818c6fd2807SJeff Garzik /** 2819c6fd2807SJeff Garzik * ata_std_prereset - prepare for reset 2820c6fd2807SJeff Garzik * @ap: ATA port to be reset 2821c6fd2807SJeff Garzik * 2822c6fd2807SJeff Garzik * @ap is about to be reset. Initialize it. 2823c6fd2807SJeff Garzik * 2824c6fd2807SJeff Garzik * LOCKING: 2825c6fd2807SJeff Garzik * Kernel thread context (may sleep) 2826c6fd2807SJeff Garzik * 2827c6fd2807SJeff Garzik * RETURNS: 2828c6fd2807SJeff Garzik * 0 on success, -errno otherwise. 2829c6fd2807SJeff Garzik */ 2830c6fd2807SJeff Garzik int ata_std_prereset(struct ata_port *ap) 2831c6fd2807SJeff Garzik { 2832c6fd2807SJeff Garzik struct ata_eh_context *ehc = &ap->eh_context; 2833c6fd2807SJeff Garzik const unsigned long *timing = sata_ehc_deb_timing(ehc); 2834c6fd2807SJeff Garzik int rc; 2835c6fd2807SJeff Garzik 2836c6fd2807SJeff Garzik /* handle link resume & hotplug spinup */ 2837c6fd2807SJeff Garzik if ((ehc->i.flags & ATA_EHI_RESUME_LINK) && 2838c6fd2807SJeff Garzik (ap->flags & ATA_FLAG_HRST_TO_RESUME)) 2839c6fd2807SJeff Garzik ehc->i.action |= ATA_EH_HARDRESET; 2840c6fd2807SJeff Garzik 2841c6fd2807SJeff Garzik if ((ehc->i.flags & ATA_EHI_HOTPLUGGED) && 2842c6fd2807SJeff Garzik (ap->flags & ATA_FLAG_SKIP_D2H_BSY)) 2843c6fd2807SJeff Garzik ata_wait_spinup(ap); 2844c6fd2807SJeff Garzik 2845c6fd2807SJeff Garzik /* if we're about to do hardreset, nothing more to do */ 2846c6fd2807SJeff Garzik if (ehc->i.action & ATA_EH_HARDRESET) 2847c6fd2807SJeff Garzik return 0; 2848c6fd2807SJeff Garzik 2849c6fd2807SJeff Garzik /* if SATA, resume phy */ 2850c6fd2807SJeff Garzik if (ap->cbl == ATA_CBL_SATA) { 2851c6fd2807SJeff Garzik rc = sata_phy_resume(ap, timing); 2852c6fd2807SJeff Garzik if (rc && rc != -EOPNOTSUPP) { 2853c6fd2807SJeff Garzik /* phy resume failed */ 2854c6fd2807SJeff Garzik ata_port_printk(ap, KERN_WARNING, "failed to resume " 2855c6fd2807SJeff Garzik "link for reset (errno=%d)\n", rc); 2856c6fd2807SJeff Garzik return rc; 2857c6fd2807SJeff Garzik } 2858c6fd2807SJeff Garzik } 2859c6fd2807SJeff Garzik 2860c6fd2807SJeff Garzik /* Wait for !BSY if the controller can wait for the first D2H 2861c6fd2807SJeff Garzik * Reg FIS and we don't know that no device is attached. 2862c6fd2807SJeff Garzik */ 2863c6fd2807SJeff Garzik if (!(ap->flags & ATA_FLAG_SKIP_D2H_BSY) && !ata_port_offline(ap)) 2864c6fd2807SJeff Garzik ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT); 2865c6fd2807SJeff Garzik 2866c6fd2807SJeff Garzik return 0; 2867c6fd2807SJeff Garzik } 2868c6fd2807SJeff Garzik 2869c6fd2807SJeff Garzik /** 2870c6fd2807SJeff Garzik * ata_std_softreset - reset host port via ATA SRST 2871c6fd2807SJeff Garzik * @ap: port to reset 2872c6fd2807SJeff Garzik * @classes: resulting classes of attached devices 2873c6fd2807SJeff Garzik * 2874c6fd2807SJeff Garzik * Reset host port using ATA SRST. 2875c6fd2807SJeff Garzik * 2876c6fd2807SJeff Garzik * LOCKING: 2877c6fd2807SJeff Garzik * Kernel thread context (may sleep) 2878c6fd2807SJeff Garzik * 2879c6fd2807SJeff Garzik * RETURNS: 2880c6fd2807SJeff Garzik * 0 on success, -errno otherwise. 2881c6fd2807SJeff Garzik */ 2882c6fd2807SJeff Garzik int ata_std_softreset(struct ata_port *ap, unsigned int *classes) 2883c6fd2807SJeff Garzik { 2884c6fd2807SJeff Garzik unsigned int slave_possible = ap->flags & ATA_FLAG_SLAVE_POSS; 2885c6fd2807SJeff Garzik unsigned int devmask = 0, err_mask; 2886c6fd2807SJeff Garzik u8 err; 2887c6fd2807SJeff Garzik 2888c6fd2807SJeff Garzik DPRINTK("ENTER\n"); 2889c6fd2807SJeff Garzik 2890c6fd2807SJeff Garzik if (ata_port_offline(ap)) { 2891c6fd2807SJeff Garzik classes[0] = ATA_DEV_NONE; 2892c6fd2807SJeff Garzik goto out; 2893c6fd2807SJeff Garzik } 2894c6fd2807SJeff Garzik 2895c6fd2807SJeff Garzik /* determine if device 0/1 are present */ 2896c6fd2807SJeff Garzik if (ata_devchk(ap, 0)) 2897c6fd2807SJeff Garzik devmask |= (1 << 0); 2898c6fd2807SJeff Garzik if (slave_possible && ata_devchk(ap, 1)) 2899c6fd2807SJeff Garzik devmask |= (1 << 1); 2900c6fd2807SJeff Garzik 2901c6fd2807SJeff Garzik /* select device 0 again */ 2902c6fd2807SJeff Garzik ap->ops->dev_select(ap, 0); 2903c6fd2807SJeff Garzik 2904c6fd2807SJeff Garzik /* issue bus reset */ 2905c6fd2807SJeff Garzik DPRINTK("about to softreset, devmask=%x\n", devmask); 2906c6fd2807SJeff Garzik err_mask = ata_bus_softreset(ap, devmask); 2907c6fd2807SJeff Garzik if (err_mask) { 2908c6fd2807SJeff Garzik ata_port_printk(ap, KERN_ERR, "SRST failed (err_mask=0x%x)\n", 2909c6fd2807SJeff Garzik err_mask); 2910c6fd2807SJeff Garzik return -EIO; 2911c6fd2807SJeff Garzik } 2912c6fd2807SJeff Garzik 2913c6fd2807SJeff Garzik /* determine by signature whether we have ATA or ATAPI devices */ 2914c6fd2807SJeff Garzik classes[0] = ata_dev_try_classify(ap, 0, &err); 2915c6fd2807SJeff Garzik if (slave_possible && err != 0x81) 2916c6fd2807SJeff Garzik classes[1] = ata_dev_try_classify(ap, 1, &err); 2917c6fd2807SJeff Garzik 2918c6fd2807SJeff Garzik out: 2919c6fd2807SJeff Garzik DPRINTK("EXIT, classes[0]=%u [1]=%u\n", classes[0], classes[1]); 2920c6fd2807SJeff Garzik return 0; 2921c6fd2807SJeff Garzik } 2922c6fd2807SJeff Garzik 2923c6fd2807SJeff Garzik /** 2924b6103f6dSTejun Heo * sata_port_hardreset - reset port via SATA phy reset 2925c6fd2807SJeff Garzik * @ap: port to reset 2926b6103f6dSTejun Heo * @timing: timing parameters { interval, duratinon, timeout } in msec 2927c6fd2807SJeff Garzik * 2928c6fd2807SJeff Garzik * SATA phy-reset host port using DET bits of SControl register. 2929c6fd2807SJeff Garzik * 2930c6fd2807SJeff Garzik * LOCKING: 2931c6fd2807SJeff Garzik * Kernel thread context (may sleep) 2932c6fd2807SJeff Garzik * 2933c6fd2807SJeff Garzik * RETURNS: 2934c6fd2807SJeff Garzik * 0 on success, -errno otherwise. 2935c6fd2807SJeff Garzik */ 2936b6103f6dSTejun Heo int sata_port_hardreset(struct ata_port *ap, const unsigned long *timing) 2937c6fd2807SJeff Garzik { 2938c6fd2807SJeff Garzik u32 scontrol; 2939c6fd2807SJeff Garzik int rc; 2940c6fd2807SJeff Garzik 2941c6fd2807SJeff Garzik DPRINTK("ENTER\n"); 2942c6fd2807SJeff Garzik 2943c6fd2807SJeff Garzik if (sata_set_spd_needed(ap)) { 2944c6fd2807SJeff Garzik /* SATA spec says nothing about how to reconfigure 2945c6fd2807SJeff Garzik * spd. To be on the safe side, turn off phy during 2946c6fd2807SJeff Garzik * reconfiguration. This works for at least ICH7 AHCI 2947c6fd2807SJeff Garzik * and Sil3124. 2948c6fd2807SJeff Garzik */ 2949c6fd2807SJeff Garzik if ((rc = sata_scr_read(ap, SCR_CONTROL, &scontrol))) 2950b6103f6dSTejun Heo goto out; 2951c6fd2807SJeff Garzik 2952cea0d336SJeff Garzik scontrol = (scontrol & 0x0f0) | 0x304; 2953c6fd2807SJeff Garzik 2954c6fd2807SJeff Garzik if ((rc = sata_scr_write(ap, SCR_CONTROL, scontrol))) 2955b6103f6dSTejun Heo goto out; 2956c6fd2807SJeff Garzik 2957c6fd2807SJeff Garzik sata_set_spd(ap); 2958c6fd2807SJeff Garzik } 2959c6fd2807SJeff Garzik 2960c6fd2807SJeff Garzik /* issue phy wake/reset */ 2961c6fd2807SJeff Garzik if ((rc = sata_scr_read(ap, SCR_CONTROL, &scontrol))) 2962b6103f6dSTejun Heo goto out; 2963c6fd2807SJeff Garzik 2964c6fd2807SJeff Garzik scontrol = (scontrol & 0x0f0) | 0x301; 2965c6fd2807SJeff Garzik 2966c6fd2807SJeff Garzik if ((rc = sata_scr_write_flush(ap, SCR_CONTROL, scontrol))) 2967b6103f6dSTejun Heo goto out; 2968c6fd2807SJeff Garzik 2969c6fd2807SJeff Garzik /* Couldn't find anything in SATA I/II specs, but AHCI-1.1 2970c6fd2807SJeff Garzik * 10.4.2 says at least 1 ms. 2971c6fd2807SJeff Garzik */ 2972c6fd2807SJeff Garzik msleep(1); 2973c6fd2807SJeff Garzik 2974c6fd2807SJeff Garzik /* bring phy back */ 2975b6103f6dSTejun Heo rc = sata_phy_resume(ap, timing); 2976b6103f6dSTejun Heo out: 2977b6103f6dSTejun Heo DPRINTK("EXIT, rc=%d\n", rc); 2978b6103f6dSTejun Heo return rc; 2979b6103f6dSTejun Heo } 2980b6103f6dSTejun Heo 2981b6103f6dSTejun Heo /** 2982b6103f6dSTejun Heo * sata_std_hardreset - reset host port via SATA phy reset 2983b6103f6dSTejun Heo * @ap: port to reset 2984b6103f6dSTejun Heo * @class: resulting class of attached device 2985b6103f6dSTejun Heo * 2986b6103f6dSTejun Heo * SATA phy-reset host port using DET bits of SControl register, 2987b6103f6dSTejun Heo * wait for !BSY and classify the attached device. 2988b6103f6dSTejun Heo * 2989b6103f6dSTejun Heo * LOCKING: 2990b6103f6dSTejun Heo * Kernel thread context (may sleep) 2991b6103f6dSTejun Heo * 2992b6103f6dSTejun Heo * RETURNS: 2993b6103f6dSTejun Heo * 0 on success, -errno otherwise. 2994b6103f6dSTejun Heo */ 2995b6103f6dSTejun Heo int sata_std_hardreset(struct ata_port *ap, unsigned int *class) 2996b6103f6dSTejun Heo { 2997b6103f6dSTejun Heo const unsigned long *timing = sata_ehc_deb_timing(&ap->eh_context); 2998b6103f6dSTejun Heo int rc; 2999b6103f6dSTejun Heo 3000b6103f6dSTejun Heo DPRINTK("ENTER\n"); 3001b6103f6dSTejun Heo 3002b6103f6dSTejun Heo /* do hardreset */ 3003b6103f6dSTejun Heo rc = sata_port_hardreset(ap, timing); 3004b6103f6dSTejun Heo if (rc) { 3005b6103f6dSTejun Heo ata_port_printk(ap, KERN_ERR, 3006b6103f6dSTejun Heo "COMRESET failed (errno=%d)\n", rc); 3007b6103f6dSTejun Heo return rc; 3008b6103f6dSTejun Heo } 3009c6fd2807SJeff Garzik 3010c6fd2807SJeff Garzik /* TODO: phy layer with polling, timeouts, etc. */ 3011c6fd2807SJeff Garzik if (ata_port_offline(ap)) { 3012c6fd2807SJeff Garzik *class = ATA_DEV_NONE; 3013c6fd2807SJeff Garzik DPRINTK("EXIT, link offline\n"); 3014c6fd2807SJeff Garzik return 0; 3015c6fd2807SJeff Garzik } 3016c6fd2807SJeff Garzik 3017c6fd2807SJeff Garzik if (ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT)) { 3018c6fd2807SJeff Garzik ata_port_printk(ap, KERN_ERR, 3019c6fd2807SJeff Garzik "COMRESET failed (device not ready)\n"); 3020c6fd2807SJeff Garzik return -EIO; 3021c6fd2807SJeff Garzik } 3022c6fd2807SJeff Garzik 3023c6fd2807SJeff Garzik ap->ops->dev_select(ap, 0); /* probably unnecessary */ 3024c6fd2807SJeff Garzik 3025c6fd2807SJeff Garzik *class = ata_dev_try_classify(ap, 0, NULL); 3026c6fd2807SJeff Garzik 3027c6fd2807SJeff Garzik DPRINTK("EXIT, class=%u\n", *class); 3028c6fd2807SJeff Garzik return 0; 3029c6fd2807SJeff Garzik } 3030c6fd2807SJeff Garzik 3031c6fd2807SJeff Garzik /** 3032c6fd2807SJeff Garzik * ata_std_postreset - standard postreset callback 3033c6fd2807SJeff Garzik * @ap: the target ata_port 3034c6fd2807SJeff Garzik * @classes: classes of attached devices 3035c6fd2807SJeff Garzik * 3036c6fd2807SJeff Garzik * This function is invoked after a successful reset. Note that 3037c6fd2807SJeff Garzik * the device might have been reset more than once using 3038c6fd2807SJeff Garzik * different reset methods before postreset is invoked. 3039c6fd2807SJeff Garzik * 3040c6fd2807SJeff Garzik * LOCKING: 3041c6fd2807SJeff Garzik * Kernel thread context (may sleep) 3042c6fd2807SJeff Garzik */ 3043c6fd2807SJeff Garzik void ata_std_postreset(struct ata_port *ap, unsigned int *classes) 3044c6fd2807SJeff Garzik { 3045c6fd2807SJeff Garzik u32 serror; 3046c6fd2807SJeff Garzik 3047c6fd2807SJeff Garzik DPRINTK("ENTER\n"); 3048c6fd2807SJeff Garzik 3049c6fd2807SJeff Garzik /* print link status */ 3050c6fd2807SJeff Garzik sata_print_link_status(ap); 3051c6fd2807SJeff Garzik 3052c6fd2807SJeff Garzik /* clear SError */ 3053c6fd2807SJeff Garzik if (sata_scr_read(ap, SCR_ERROR, &serror) == 0) 3054c6fd2807SJeff Garzik sata_scr_write(ap, SCR_ERROR, serror); 3055c6fd2807SJeff Garzik 3056c6fd2807SJeff Garzik /* re-enable interrupts */ 3057c6fd2807SJeff Garzik if (!ap->ops->error_handler) { 3058c6fd2807SJeff Garzik /* FIXME: hack. create a hook instead */ 3059c6fd2807SJeff Garzik if (ap->ioaddr.ctl_addr) 3060c6fd2807SJeff Garzik ata_irq_on(ap); 3061c6fd2807SJeff Garzik } 3062c6fd2807SJeff Garzik 3063c6fd2807SJeff Garzik /* is double-select really necessary? */ 3064c6fd2807SJeff Garzik if (classes[0] != ATA_DEV_NONE) 3065c6fd2807SJeff Garzik ap->ops->dev_select(ap, 1); 3066c6fd2807SJeff Garzik if (classes[1] != ATA_DEV_NONE) 3067c6fd2807SJeff Garzik ap->ops->dev_select(ap, 0); 3068c6fd2807SJeff Garzik 3069c6fd2807SJeff Garzik /* bail out if no device is present */ 3070c6fd2807SJeff Garzik if (classes[0] == ATA_DEV_NONE && classes[1] == ATA_DEV_NONE) { 3071c6fd2807SJeff Garzik DPRINTK("EXIT, no device\n"); 3072c6fd2807SJeff Garzik return; 3073c6fd2807SJeff Garzik } 3074c6fd2807SJeff Garzik 3075c6fd2807SJeff Garzik /* set up device control */ 30760d5ff566STejun Heo if (ap->ioaddr.ctl_addr) 30770d5ff566STejun Heo iowrite8(ap->ctl, ap->ioaddr.ctl_addr); 3078c6fd2807SJeff Garzik 3079c6fd2807SJeff Garzik DPRINTK("EXIT\n"); 3080c6fd2807SJeff Garzik } 3081c6fd2807SJeff Garzik 3082c6fd2807SJeff Garzik /** 3083c6fd2807SJeff Garzik * ata_dev_same_device - Determine whether new ID matches configured device 3084c6fd2807SJeff Garzik * @dev: device to compare against 3085c6fd2807SJeff Garzik * @new_class: class of the new device 3086c6fd2807SJeff Garzik * @new_id: IDENTIFY page of the new device 3087c6fd2807SJeff Garzik * 3088c6fd2807SJeff Garzik * Compare @new_class and @new_id against @dev and determine 3089c6fd2807SJeff Garzik * whether @dev is the device indicated by @new_class and 3090c6fd2807SJeff Garzik * @new_id. 3091c6fd2807SJeff Garzik * 3092c6fd2807SJeff Garzik * LOCKING: 3093c6fd2807SJeff Garzik * None. 3094c6fd2807SJeff Garzik * 3095c6fd2807SJeff Garzik * RETURNS: 3096c6fd2807SJeff Garzik * 1 if @dev matches @new_class and @new_id, 0 otherwise. 3097c6fd2807SJeff Garzik */ 3098c6fd2807SJeff Garzik static int ata_dev_same_device(struct ata_device *dev, unsigned int new_class, 3099c6fd2807SJeff Garzik const u16 *new_id) 3100c6fd2807SJeff Garzik { 3101c6fd2807SJeff Garzik const u16 *old_id = dev->id; 3102a0cf733bSTejun Heo unsigned char model[2][ATA_ID_PROD_LEN + 1]; 3103a0cf733bSTejun Heo unsigned char serial[2][ATA_ID_SERNO_LEN + 1]; 3104c6fd2807SJeff Garzik u64 new_n_sectors; 3105c6fd2807SJeff Garzik 3106c6fd2807SJeff Garzik if (dev->class != new_class) { 3107c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_INFO, "class mismatch %d != %d\n", 3108c6fd2807SJeff Garzik dev->class, new_class); 3109c6fd2807SJeff Garzik return 0; 3110c6fd2807SJeff Garzik } 3111c6fd2807SJeff Garzik 3112a0cf733bSTejun Heo ata_id_c_string(old_id, model[0], ATA_ID_PROD, sizeof(model[0])); 3113a0cf733bSTejun Heo ata_id_c_string(new_id, model[1], ATA_ID_PROD, sizeof(model[1])); 3114a0cf733bSTejun Heo ata_id_c_string(old_id, serial[0], ATA_ID_SERNO, sizeof(serial[0])); 3115a0cf733bSTejun Heo ata_id_c_string(new_id, serial[1], ATA_ID_SERNO, sizeof(serial[1])); 3116c6fd2807SJeff Garzik new_n_sectors = ata_id_n_sectors(new_id); 3117c6fd2807SJeff Garzik 3118c6fd2807SJeff Garzik if (strcmp(model[0], model[1])) { 3119c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_INFO, "model number mismatch " 3120c6fd2807SJeff Garzik "'%s' != '%s'\n", model[0], model[1]); 3121c6fd2807SJeff Garzik return 0; 3122c6fd2807SJeff Garzik } 3123c6fd2807SJeff Garzik 3124c6fd2807SJeff Garzik if (strcmp(serial[0], serial[1])) { 3125c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_INFO, "serial number mismatch " 3126c6fd2807SJeff Garzik "'%s' != '%s'\n", serial[0], serial[1]); 3127c6fd2807SJeff Garzik return 0; 3128c6fd2807SJeff Garzik } 3129c6fd2807SJeff Garzik 3130c6fd2807SJeff Garzik if (dev->class == ATA_DEV_ATA && dev->n_sectors != new_n_sectors) { 3131c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_INFO, "n_sectors mismatch " 3132c6fd2807SJeff Garzik "%llu != %llu\n", 3133c6fd2807SJeff Garzik (unsigned long long)dev->n_sectors, 3134c6fd2807SJeff Garzik (unsigned long long)new_n_sectors); 3135c6fd2807SJeff Garzik return 0; 3136c6fd2807SJeff Garzik } 3137c6fd2807SJeff Garzik 3138c6fd2807SJeff Garzik return 1; 3139c6fd2807SJeff Garzik } 3140c6fd2807SJeff Garzik 3141c6fd2807SJeff Garzik /** 3142c6fd2807SJeff Garzik * ata_dev_revalidate - Revalidate ATA device 3143c6fd2807SJeff Garzik * @dev: device to revalidate 3144bff04647STejun Heo * @readid_flags: read ID flags 3145c6fd2807SJeff Garzik * 3146c6fd2807SJeff Garzik * Re-read IDENTIFY page and make sure @dev is still attached to 3147c6fd2807SJeff Garzik * the port. 3148c6fd2807SJeff Garzik * 3149c6fd2807SJeff Garzik * LOCKING: 3150c6fd2807SJeff Garzik * Kernel thread context (may sleep) 3151c6fd2807SJeff Garzik * 3152c6fd2807SJeff Garzik * RETURNS: 3153c6fd2807SJeff Garzik * 0 on success, negative errno otherwise 3154c6fd2807SJeff Garzik */ 3155bff04647STejun Heo int ata_dev_revalidate(struct ata_device *dev, unsigned int readid_flags) 3156c6fd2807SJeff Garzik { 3157c6fd2807SJeff Garzik unsigned int class = dev->class; 3158c6fd2807SJeff Garzik u16 *id = (void *)dev->ap->sector_buf; 3159c6fd2807SJeff Garzik int rc; 3160c6fd2807SJeff Garzik 3161c6fd2807SJeff Garzik if (!ata_dev_enabled(dev)) { 3162c6fd2807SJeff Garzik rc = -ENODEV; 3163c6fd2807SJeff Garzik goto fail; 3164c6fd2807SJeff Garzik } 3165c6fd2807SJeff Garzik 3166c6fd2807SJeff Garzik /* read ID data */ 3167bff04647STejun Heo rc = ata_dev_read_id(dev, &class, readid_flags, id); 3168c6fd2807SJeff Garzik if (rc) 3169c6fd2807SJeff Garzik goto fail; 3170c6fd2807SJeff Garzik 3171c6fd2807SJeff Garzik /* is the device still there? */ 3172c6fd2807SJeff Garzik if (!ata_dev_same_device(dev, class, id)) { 3173c6fd2807SJeff Garzik rc = -ENODEV; 3174c6fd2807SJeff Garzik goto fail; 3175c6fd2807SJeff Garzik } 3176c6fd2807SJeff Garzik 3177c6fd2807SJeff Garzik memcpy(dev->id, id, sizeof(id[0]) * ATA_ID_WORDS); 3178c6fd2807SJeff Garzik 3179c6fd2807SJeff Garzik /* configure device according to the new ID */ 3180efdaedc4STejun Heo rc = ata_dev_configure(dev); 3181c6fd2807SJeff Garzik if (rc == 0) 3182c6fd2807SJeff Garzik return 0; 3183c6fd2807SJeff Garzik 3184c6fd2807SJeff Garzik fail: 3185c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_ERR, "revalidation failed (errno=%d)\n", rc); 3186c6fd2807SJeff Garzik return rc; 3187c6fd2807SJeff Garzik } 3188c6fd2807SJeff Garzik 31896919a0a6SAlan Cox struct ata_blacklist_entry { 31906919a0a6SAlan Cox const char *model_num; 31916919a0a6SAlan Cox const char *model_rev; 31926919a0a6SAlan Cox unsigned long horkage; 31936919a0a6SAlan Cox }; 31946919a0a6SAlan Cox 31956919a0a6SAlan Cox static const struct ata_blacklist_entry ata_device_blacklist [] = { 31966919a0a6SAlan Cox /* Devices with DMA related problems under Linux */ 31976919a0a6SAlan Cox { "WDC AC11000H", NULL, ATA_HORKAGE_NODMA }, 31986919a0a6SAlan Cox { "WDC AC22100H", NULL, ATA_HORKAGE_NODMA }, 31996919a0a6SAlan Cox { "WDC AC32500H", NULL, ATA_HORKAGE_NODMA }, 32006919a0a6SAlan Cox { "WDC AC33100H", NULL, ATA_HORKAGE_NODMA }, 32016919a0a6SAlan Cox { "WDC AC31600H", NULL, ATA_HORKAGE_NODMA }, 32026919a0a6SAlan Cox { "WDC AC32100H", "24.09P07", ATA_HORKAGE_NODMA }, 32036919a0a6SAlan Cox { "WDC AC23200L", "21.10N21", ATA_HORKAGE_NODMA }, 32046919a0a6SAlan Cox { "Compaq CRD-8241B", NULL, ATA_HORKAGE_NODMA }, 32056919a0a6SAlan Cox { "CRD-8400B", NULL, ATA_HORKAGE_NODMA }, 32066919a0a6SAlan Cox { "CRD-8480B", NULL, ATA_HORKAGE_NODMA }, 32076919a0a6SAlan Cox { "CRD-8482B", NULL, ATA_HORKAGE_NODMA }, 32086919a0a6SAlan Cox { "CRD-84", NULL, ATA_HORKAGE_NODMA }, 32096919a0a6SAlan Cox { "SanDisk SDP3B", NULL, ATA_HORKAGE_NODMA }, 32106919a0a6SAlan Cox { "SanDisk SDP3B-64", NULL, ATA_HORKAGE_NODMA }, 32116919a0a6SAlan Cox { "SANYO CD-ROM CRD", NULL, ATA_HORKAGE_NODMA }, 32126919a0a6SAlan Cox { "HITACHI CDR-8", NULL, ATA_HORKAGE_NODMA }, 32136919a0a6SAlan Cox { "HITACHI CDR-8335", NULL, ATA_HORKAGE_NODMA }, 32146919a0a6SAlan Cox { "HITACHI CDR-8435", NULL, ATA_HORKAGE_NODMA }, 32156919a0a6SAlan Cox { "Toshiba CD-ROM XM-6202B", NULL, ATA_HORKAGE_NODMA }, 32166919a0a6SAlan Cox { "TOSHIBA CD-ROM XM-1702BC", NULL, ATA_HORKAGE_NODMA }, 32176919a0a6SAlan Cox { "CD-532E-A", NULL, ATA_HORKAGE_NODMA }, 32186919a0a6SAlan Cox { "E-IDE CD-ROM CR-840",NULL, ATA_HORKAGE_NODMA }, 32196919a0a6SAlan Cox { "CD-ROM Drive/F5A", NULL, ATA_HORKAGE_NODMA }, 32206919a0a6SAlan Cox { "WPI CDD-820", NULL, ATA_HORKAGE_NODMA }, 32216919a0a6SAlan Cox { "SAMSUNG CD-ROM SC-148C", NULL, ATA_HORKAGE_NODMA }, 32226919a0a6SAlan Cox { "SAMSUNG CD-ROM SC", NULL, ATA_HORKAGE_NODMA }, 32236919a0a6SAlan Cox { "SanDisk SDP3B-64", NULL, ATA_HORKAGE_NODMA }, 32246919a0a6SAlan Cox { "ATAPI CD-ROM DRIVE 40X MAXIMUM",NULL,ATA_HORKAGE_NODMA }, 32256919a0a6SAlan Cox { "_NEC DV5800A", NULL, ATA_HORKAGE_NODMA }, 32266919a0a6SAlan Cox { "SAMSUNG CD-ROM SN-124","N001", ATA_HORKAGE_NODMA }, 32276919a0a6SAlan Cox 32286919a0a6SAlan Cox /* Devices we expect to fail diagnostics */ 32296919a0a6SAlan Cox 32306919a0a6SAlan Cox /* Devices where NCQ should be avoided */ 32316919a0a6SAlan Cox /* NCQ is slow */ 32326919a0a6SAlan Cox { "WDC WD740ADFD-00", NULL, ATA_HORKAGE_NONCQ }, 32336919a0a6SAlan Cox 32346919a0a6SAlan Cox /* Devices with NCQ limits */ 32356919a0a6SAlan Cox 32366919a0a6SAlan Cox /* End Marker */ 32376919a0a6SAlan Cox { } 3238c6fd2807SJeff Garzik }; 3239c6fd2807SJeff Garzik 32406919a0a6SAlan Cox unsigned long ata_device_blacklisted(const struct ata_device *dev) 3241c6fd2807SJeff Garzik { 32428bfa79fcSTejun Heo unsigned char model_num[ATA_ID_PROD_LEN + 1]; 32438bfa79fcSTejun Heo unsigned char model_rev[ATA_ID_FW_REV_LEN + 1]; 32446919a0a6SAlan Cox const struct ata_blacklist_entry *ad = ata_device_blacklist; 3245c6fd2807SJeff Garzik 32468bfa79fcSTejun Heo ata_id_c_string(dev->id, model_num, ATA_ID_PROD, sizeof(model_num)); 32478bfa79fcSTejun Heo ata_id_c_string(dev->id, model_rev, ATA_ID_FW_REV, sizeof(model_rev)); 3248c6fd2807SJeff Garzik 32496919a0a6SAlan Cox while (ad->model_num) { 32508bfa79fcSTejun Heo if (!strcmp(ad->model_num, model_num)) { 32516919a0a6SAlan Cox if (ad->model_rev == NULL) 32526919a0a6SAlan Cox return ad->horkage; 32538bfa79fcSTejun Heo if (!strcmp(ad->model_rev, model_rev)) 32546919a0a6SAlan Cox return ad->horkage; 3255c6fd2807SJeff Garzik } 32566919a0a6SAlan Cox ad++; 3257c6fd2807SJeff Garzik } 3258c6fd2807SJeff Garzik return 0; 3259c6fd2807SJeff Garzik } 3260c6fd2807SJeff Garzik 32616919a0a6SAlan Cox static int ata_dma_blacklisted(const struct ata_device *dev) 32626919a0a6SAlan Cox { 32636919a0a6SAlan Cox /* We don't support polling DMA. 32646919a0a6SAlan Cox * DMA blacklist those ATAPI devices with CDB-intr (and use PIO) 32656919a0a6SAlan Cox * if the LLDD handles only interrupts in the HSM_ST_LAST state. 32666919a0a6SAlan Cox */ 32676919a0a6SAlan Cox if ((dev->ap->flags & ATA_FLAG_PIO_POLLING) && 32686919a0a6SAlan Cox (dev->flags & ATA_DFLAG_CDB_INTR)) 32696919a0a6SAlan Cox return 1; 32706919a0a6SAlan Cox return (ata_device_blacklisted(dev) & ATA_HORKAGE_NODMA) ? 1 : 0; 32716919a0a6SAlan Cox } 32726919a0a6SAlan Cox 3273c6fd2807SJeff Garzik /** 3274c6fd2807SJeff Garzik * ata_dev_xfermask - Compute supported xfermask of the given device 3275c6fd2807SJeff Garzik * @dev: Device to compute xfermask for 3276c6fd2807SJeff Garzik * 3277c6fd2807SJeff Garzik * Compute supported xfermask of @dev and store it in 3278c6fd2807SJeff Garzik * dev->*_mask. This function is responsible for applying all 3279c6fd2807SJeff Garzik * known limits including host controller limits, device 3280c6fd2807SJeff Garzik * blacklist, etc... 3281c6fd2807SJeff Garzik * 3282c6fd2807SJeff Garzik * LOCKING: 3283c6fd2807SJeff Garzik * None. 3284c6fd2807SJeff Garzik */ 3285c6fd2807SJeff Garzik static void ata_dev_xfermask(struct ata_device *dev) 3286c6fd2807SJeff Garzik { 3287c6fd2807SJeff Garzik struct ata_port *ap = dev->ap; 3288cca3974eSJeff Garzik struct ata_host *host = ap->host; 3289c6fd2807SJeff Garzik unsigned long xfer_mask; 3290c6fd2807SJeff Garzik 3291c6fd2807SJeff Garzik /* controller modes available */ 3292c6fd2807SJeff Garzik xfer_mask = ata_pack_xfermask(ap->pio_mask, 3293c6fd2807SJeff Garzik ap->mwdma_mask, ap->udma_mask); 3294c6fd2807SJeff Garzik 3295c6fd2807SJeff Garzik /* Apply cable rule here. Don't apply it early because when 3296c6fd2807SJeff Garzik * we handle hot plug the cable type can itself change. 3297c6fd2807SJeff Garzik */ 3298c6fd2807SJeff Garzik if (ap->cbl == ATA_CBL_PATA40) 3299c6fd2807SJeff Garzik xfer_mask &= ~(0xF8 << ATA_SHIFT_UDMA); 3300fc085150SAlan Cox /* Apply drive side cable rule. Unknown or 80 pin cables reported 3301fc085150SAlan Cox * host side are checked drive side as well. Cases where we know a 3302fc085150SAlan Cox * 40wire cable is used safely for 80 are not checked here. 3303fc085150SAlan Cox */ 3304fc085150SAlan Cox if (ata_drive_40wire(dev->id) && (ap->cbl == ATA_CBL_PATA_UNK || ap->cbl == ATA_CBL_PATA80)) 3305fc085150SAlan Cox xfer_mask &= ~(0xF8 << ATA_SHIFT_UDMA); 3306fc085150SAlan Cox 3307c6fd2807SJeff Garzik 3308c6fd2807SJeff Garzik xfer_mask &= ata_pack_xfermask(dev->pio_mask, 3309c6fd2807SJeff Garzik dev->mwdma_mask, dev->udma_mask); 3310c6fd2807SJeff Garzik xfer_mask &= ata_id_xfermask(dev->id); 3311c6fd2807SJeff Garzik 3312b352e57dSAlan Cox /* 3313b352e57dSAlan Cox * CFA Advanced TrueIDE timings are not allowed on a shared 3314b352e57dSAlan Cox * cable 3315b352e57dSAlan Cox */ 3316b352e57dSAlan Cox if (ata_dev_pair(dev)) { 3317b352e57dSAlan Cox /* No PIO5 or PIO6 */ 3318b352e57dSAlan Cox xfer_mask &= ~(0x03 << (ATA_SHIFT_PIO + 5)); 3319b352e57dSAlan Cox /* No MWDMA3 or MWDMA 4 */ 3320b352e57dSAlan Cox xfer_mask &= ~(0x03 << (ATA_SHIFT_MWDMA + 3)); 3321b352e57dSAlan Cox } 3322b352e57dSAlan Cox 3323c6fd2807SJeff Garzik if (ata_dma_blacklisted(dev)) { 3324c6fd2807SJeff Garzik xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA); 3325c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_WARNING, 3326c6fd2807SJeff Garzik "device is on DMA blacklist, disabling DMA\n"); 3327c6fd2807SJeff Garzik } 3328c6fd2807SJeff Garzik 3329cca3974eSJeff Garzik if ((host->flags & ATA_HOST_SIMPLEX) && host->simplex_claimed) { 3330c6fd2807SJeff Garzik xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA); 3331c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_WARNING, "simplex DMA is claimed by " 3332c6fd2807SJeff Garzik "other device, disabling DMA\n"); 3333c6fd2807SJeff Garzik } 3334c6fd2807SJeff Garzik 3335c6fd2807SJeff Garzik if (ap->ops->mode_filter) 3336c6fd2807SJeff Garzik xfer_mask = ap->ops->mode_filter(ap, dev, xfer_mask); 3337c6fd2807SJeff Garzik 3338c6fd2807SJeff Garzik ata_unpack_xfermask(xfer_mask, &dev->pio_mask, 3339c6fd2807SJeff Garzik &dev->mwdma_mask, &dev->udma_mask); 3340c6fd2807SJeff Garzik } 3341c6fd2807SJeff Garzik 3342c6fd2807SJeff Garzik /** 3343c6fd2807SJeff Garzik * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command 3344c6fd2807SJeff Garzik * @dev: Device to which command will be sent 3345c6fd2807SJeff Garzik * 3346c6fd2807SJeff Garzik * Issue SET FEATURES - XFER MODE command to device @dev 3347c6fd2807SJeff Garzik * on port @ap. 3348c6fd2807SJeff Garzik * 3349c6fd2807SJeff Garzik * LOCKING: 3350c6fd2807SJeff Garzik * PCI/etc. bus probe sem. 3351c6fd2807SJeff Garzik * 3352c6fd2807SJeff Garzik * RETURNS: 3353c6fd2807SJeff Garzik * 0 on success, AC_ERR_* mask otherwise. 3354c6fd2807SJeff Garzik */ 3355c6fd2807SJeff Garzik 3356c6fd2807SJeff Garzik static unsigned int ata_dev_set_xfermode(struct ata_device *dev) 3357c6fd2807SJeff Garzik { 3358c6fd2807SJeff Garzik struct ata_taskfile tf; 3359c6fd2807SJeff Garzik unsigned int err_mask; 3360c6fd2807SJeff Garzik 3361c6fd2807SJeff Garzik /* set up set-features taskfile */ 3362c6fd2807SJeff Garzik DPRINTK("set features - xfer mode\n"); 3363c6fd2807SJeff Garzik 3364c6fd2807SJeff Garzik ata_tf_init(dev, &tf); 3365c6fd2807SJeff Garzik tf.command = ATA_CMD_SET_FEATURES; 3366c6fd2807SJeff Garzik tf.feature = SETFEATURES_XFER; 3367c6fd2807SJeff Garzik tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 3368c6fd2807SJeff Garzik tf.protocol = ATA_PROT_NODATA; 3369c6fd2807SJeff Garzik tf.nsect = dev->xfer_mode; 3370c6fd2807SJeff Garzik 3371c6fd2807SJeff Garzik err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0); 3372c6fd2807SJeff Garzik 3373c6fd2807SJeff Garzik DPRINTK("EXIT, err_mask=%x\n", err_mask); 3374c6fd2807SJeff Garzik return err_mask; 3375c6fd2807SJeff Garzik } 3376c6fd2807SJeff Garzik 3377c6fd2807SJeff Garzik /** 3378c6fd2807SJeff Garzik * ata_dev_init_params - Issue INIT DEV PARAMS command 3379c6fd2807SJeff Garzik * @dev: Device to which command will be sent 3380c6fd2807SJeff Garzik * @heads: Number of heads (taskfile parameter) 3381c6fd2807SJeff Garzik * @sectors: Number of sectors (taskfile parameter) 3382c6fd2807SJeff Garzik * 3383c6fd2807SJeff Garzik * LOCKING: 3384c6fd2807SJeff Garzik * Kernel thread context (may sleep) 3385c6fd2807SJeff Garzik * 3386c6fd2807SJeff Garzik * RETURNS: 3387c6fd2807SJeff Garzik * 0 on success, AC_ERR_* mask otherwise. 3388c6fd2807SJeff Garzik */ 3389c6fd2807SJeff Garzik static unsigned int ata_dev_init_params(struct ata_device *dev, 3390c6fd2807SJeff Garzik u16 heads, u16 sectors) 3391c6fd2807SJeff Garzik { 3392c6fd2807SJeff Garzik struct ata_taskfile tf; 3393c6fd2807SJeff Garzik unsigned int err_mask; 3394c6fd2807SJeff Garzik 3395c6fd2807SJeff Garzik /* Number of sectors per track 1-255. Number of heads 1-16 */ 3396c6fd2807SJeff Garzik if (sectors < 1 || sectors > 255 || heads < 1 || heads > 16) 3397c6fd2807SJeff Garzik return AC_ERR_INVALID; 3398c6fd2807SJeff Garzik 3399c6fd2807SJeff Garzik /* set up init dev params taskfile */ 3400c6fd2807SJeff Garzik DPRINTK("init dev params \n"); 3401c6fd2807SJeff Garzik 3402c6fd2807SJeff Garzik ata_tf_init(dev, &tf); 3403c6fd2807SJeff Garzik tf.command = ATA_CMD_INIT_DEV_PARAMS; 3404c6fd2807SJeff Garzik tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 3405c6fd2807SJeff Garzik tf.protocol = ATA_PROT_NODATA; 3406c6fd2807SJeff Garzik tf.nsect = sectors; 3407c6fd2807SJeff Garzik tf.device |= (heads - 1) & 0x0f; /* max head = num. of heads - 1 */ 3408c6fd2807SJeff Garzik 3409c6fd2807SJeff Garzik err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0); 3410c6fd2807SJeff Garzik 3411c6fd2807SJeff Garzik DPRINTK("EXIT, err_mask=%x\n", err_mask); 3412c6fd2807SJeff Garzik return err_mask; 3413c6fd2807SJeff Garzik } 3414c6fd2807SJeff Garzik 3415c6fd2807SJeff Garzik /** 3416c6fd2807SJeff Garzik * ata_sg_clean - Unmap DMA memory associated with command 3417c6fd2807SJeff Garzik * @qc: Command containing DMA memory to be released 3418c6fd2807SJeff Garzik * 3419c6fd2807SJeff Garzik * Unmap all mapped DMA memory associated with this command. 3420c6fd2807SJeff Garzik * 3421c6fd2807SJeff Garzik * LOCKING: 3422cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 3423c6fd2807SJeff Garzik */ 342470e6ad0cSTejun Heo void ata_sg_clean(struct ata_queued_cmd *qc) 3425c6fd2807SJeff Garzik { 3426c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 3427c6fd2807SJeff Garzik struct scatterlist *sg = qc->__sg; 3428c6fd2807SJeff Garzik int dir = qc->dma_dir; 3429c6fd2807SJeff Garzik void *pad_buf = NULL; 3430c6fd2807SJeff Garzik 3431c6fd2807SJeff Garzik WARN_ON(!(qc->flags & ATA_QCFLAG_DMAMAP)); 3432c6fd2807SJeff Garzik WARN_ON(sg == NULL); 3433c6fd2807SJeff Garzik 3434c6fd2807SJeff Garzik if (qc->flags & ATA_QCFLAG_SINGLE) 3435c6fd2807SJeff Garzik WARN_ON(qc->n_elem > 1); 3436c6fd2807SJeff Garzik 3437c6fd2807SJeff Garzik VPRINTK("unmapping %u sg elements\n", qc->n_elem); 3438c6fd2807SJeff Garzik 3439c6fd2807SJeff Garzik /* if we padded the buffer out to 32-bit bound, and data 3440c6fd2807SJeff Garzik * xfer direction is from-device, we must copy from the 3441c6fd2807SJeff Garzik * pad buffer back into the supplied buffer 3442c6fd2807SJeff Garzik */ 3443c6fd2807SJeff Garzik if (qc->pad_len && !(qc->tf.flags & ATA_TFLAG_WRITE)) 3444c6fd2807SJeff Garzik pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ); 3445c6fd2807SJeff Garzik 3446c6fd2807SJeff Garzik if (qc->flags & ATA_QCFLAG_SG) { 3447c6fd2807SJeff Garzik if (qc->n_elem) 3448c6fd2807SJeff Garzik dma_unmap_sg(ap->dev, sg, qc->n_elem, dir); 3449c6fd2807SJeff Garzik /* restore last sg */ 3450c6fd2807SJeff Garzik sg[qc->orig_n_elem - 1].length += qc->pad_len; 3451c6fd2807SJeff Garzik if (pad_buf) { 3452c6fd2807SJeff Garzik struct scatterlist *psg = &qc->pad_sgent; 3453c6fd2807SJeff Garzik void *addr = kmap_atomic(psg->page, KM_IRQ0); 3454c6fd2807SJeff Garzik memcpy(addr + psg->offset, pad_buf, qc->pad_len); 3455c6fd2807SJeff Garzik kunmap_atomic(addr, KM_IRQ0); 3456c6fd2807SJeff Garzik } 3457c6fd2807SJeff Garzik } else { 3458c6fd2807SJeff Garzik if (qc->n_elem) 3459c6fd2807SJeff Garzik dma_unmap_single(ap->dev, 3460c6fd2807SJeff Garzik sg_dma_address(&sg[0]), sg_dma_len(&sg[0]), 3461c6fd2807SJeff Garzik dir); 3462c6fd2807SJeff Garzik /* restore sg */ 3463c6fd2807SJeff Garzik sg->length += qc->pad_len; 3464c6fd2807SJeff Garzik if (pad_buf) 3465c6fd2807SJeff Garzik memcpy(qc->buf_virt + sg->length - qc->pad_len, 3466c6fd2807SJeff Garzik pad_buf, qc->pad_len); 3467c6fd2807SJeff Garzik } 3468c6fd2807SJeff Garzik 3469c6fd2807SJeff Garzik qc->flags &= ~ATA_QCFLAG_DMAMAP; 3470c6fd2807SJeff Garzik qc->__sg = NULL; 3471c6fd2807SJeff Garzik } 3472c6fd2807SJeff Garzik 3473c6fd2807SJeff Garzik /** 3474c6fd2807SJeff Garzik * ata_fill_sg - Fill PCI IDE PRD table 3475c6fd2807SJeff Garzik * @qc: Metadata associated with taskfile to be transferred 3476c6fd2807SJeff Garzik * 3477c6fd2807SJeff Garzik * Fill PCI IDE PRD (scatter-gather) table with segments 3478c6fd2807SJeff Garzik * associated with the current disk command. 3479c6fd2807SJeff Garzik * 3480c6fd2807SJeff Garzik * LOCKING: 3481cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 3482c6fd2807SJeff Garzik * 3483c6fd2807SJeff Garzik */ 3484c6fd2807SJeff Garzik static void ata_fill_sg(struct ata_queued_cmd *qc) 3485c6fd2807SJeff Garzik { 3486c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 3487c6fd2807SJeff Garzik struct scatterlist *sg; 3488c6fd2807SJeff Garzik unsigned int idx; 3489c6fd2807SJeff Garzik 3490c6fd2807SJeff Garzik WARN_ON(qc->__sg == NULL); 3491c6fd2807SJeff Garzik WARN_ON(qc->n_elem == 0 && qc->pad_len == 0); 3492c6fd2807SJeff Garzik 3493c6fd2807SJeff Garzik idx = 0; 3494c6fd2807SJeff Garzik ata_for_each_sg(sg, qc) { 3495c6fd2807SJeff Garzik u32 addr, offset; 3496c6fd2807SJeff Garzik u32 sg_len, len; 3497c6fd2807SJeff Garzik 3498c6fd2807SJeff Garzik /* determine if physical DMA addr spans 64K boundary. 3499c6fd2807SJeff Garzik * Note h/w doesn't support 64-bit, so we unconditionally 3500c6fd2807SJeff Garzik * truncate dma_addr_t to u32. 3501c6fd2807SJeff Garzik */ 3502c6fd2807SJeff Garzik addr = (u32) sg_dma_address(sg); 3503c6fd2807SJeff Garzik sg_len = sg_dma_len(sg); 3504c6fd2807SJeff Garzik 3505c6fd2807SJeff Garzik while (sg_len) { 3506c6fd2807SJeff Garzik offset = addr & 0xffff; 3507c6fd2807SJeff Garzik len = sg_len; 3508c6fd2807SJeff Garzik if ((offset + sg_len) > 0x10000) 3509c6fd2807SJeff Garzik len = 0x10000 - offset; 3510c6fd2807SJeff Garzik 3511c6fd2807SJeff Garzik ap->prd[idx].addr = cpu_to_le32(addr); 3512c6fd2807SJeff Garzik ap->prd[idx].flags_len = cpu_to_le32(len & 0xffff); 3513c6fd2807SJeff Garzik VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", idx, addr, len); 3514c6fd2807SJeff Garzik 3515c6fd2807SJeff Garzik idx++; 3516c6fd2807SJeff Garzik sg_len -= len; 3517c6fd2807SJeff Garzik addr += len; 3518c6fd2807SJeff Garzik } 3519c6fd2807SJeff Garzik } 3520c6fd2807SJeff Garzik 3521c6fd2807SJeff Garzik if (idx) 3522c6fd2807SJeff Garzik ap->prd[idx - 1].flags_len |= cpu_to_le32(ATA_PRD_EOT); 3523c6fd2807SJeff Garzik } 3524c6fd2807SJeff Garzik /** 3525c6fd2807SJeff Garzik * ata_check_atapi_dma - Check whether ATAPI DMA can be supported 3526c6fd2807SJeff Garzik * @qc: Metadata associated with taskfile to check 3527c6fd2807SJeff Garzik * 3528c6fd2807SJeff Garzik * Allow low-level driver to filter ATA PACKET commands, returning 3529c6fd2807SJeff Garzik * a status indicating whether or not it is OK to use DMA for the 3530c6fd2807SJeff Garzik * supplied PACKET command. 3531c6fd2807SJeff Garzik * 3532c6fd2807SJeff Garzik * LOCKING: 3533cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 3534c6fd2807SJeff Garzik * 3535c6fd2807SJeff Garzik * RETURNS: 0 when ATAPI DMA can be used 3536c6fd2807SJeff Garzik * nonzero otherwise 3537c6fd2807SJeff Garzik */ 3538c6fd2807SJeff Garzik int ata_check_atapi_dma(struct ata_queued_cmd *qc) 3539c6fd2807SJeff Garzik { 3540c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 3541c6fd2807SJeff Garzik int rc = 0; /* Assume ATAPI DMA is OK by default */ 3542c6fd2807SJeff Garzik 3543c6fd2807SJeff Garzik if (ap->ops->check_atapi_dma) 3544c6fd2807SJeff Garzik rc = ap->ops->check_atapi_dma(qc); 3545c6fd2807SJeff Garzik 3546c6fd2807SJeff Garzik return rc; 3547c6fd2807SJeff Garzik } 3548c6fd2807SJeff Garzik /** 3549c6fd2807SJeff Garzik * ata_qc_prep - Prepare taskfile for submission 3550c6fd2807SJeff Garzik * @qc: Metadata associated with taskfile to be prepared 3551c6fd2807SJeff Garzik * 3552c6fd2807SJeff Garzik * Prepare ATA taskfile for submission. 3553c6fd2807SJeff Garzik * 3554c6fd2807SJeff Garzik * LOCKING: 3555cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 3556c6fd2807SJeff Garzik */ 3557c6fd2807SJeff Garzik void ata_qc_prep(struct ata_queued_cmd *qc) 3558c6fd2807SJeff Garzik { 3559c6fd2807SJeff Garzik if (!(qc->flags & ATA_QCFLAG_DMAMAP)) 3560c6fd2807SJeff Garzik return; 3561c6fd2807SJeff Garzik 3562c6fd2807SJeff Garzik ata_fill_sg(qc); 3563c6fd2807SJeff Garzik } 3564c6fd2807SJeff Garzik 3565c6fd2807SJeff Garzik void ata_noop_qc_prep(struct ata_queued_cmd *qc) { } 3566c6fd2807SJeff Garzik 3567c6fd2807SJeff Garzik /** 3568c6fd2807SJeff Garzik * ata_sg_init_one - Associate command with memory buffer 3569c6fd2807SJeff Garzik * @qc: Command to be associated 3570c6fd2807SJeff Garzik * @buf: Memory buffer 3571c6fd2807SJeff Garzik * @buflen: Length of memory buffer, in bytes. 3572c6fd2807SJeff Garzik * 3573c6fd2807SJeff Garzik * Initialize the data-related elements of queued_cmd @qc 3574c6fd2807SJeff Garzik * to point to a single memory buffer, @buf of byte length @buflen. 3575c6fd2807SJeff Garzik * 3576c6fd2807SJeff Garzik * LOCKING: 3577cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 3578c6fd2807SJeff Garzik */ 3579c6fd2807SJeff Garzik 3580c6fd2807SJeff Garzik void ata_sg_init_one(struct ata_queued_cmd *qc, void *buf, unsigned int buflen) 3581c6fd2807SJeff Garzik { 3582c6fd2807SJeff Garzik qc->flags |= ATA_QCFLAG_SINGLE; 3583c6fd2807SJeff Garzik 3584c6fd2807SJeff Garzik qc->__sg = &qc->sgent; 3585c6fd2807SJeff Garzik qc->n_elem = 1; 3586c6fd2807SJeff Garzik qc->orig_n_elem = 1; 3587c6fd2807SJeff Garzik qc->buf_virt = buf; 3588c6fd2807SJeff Garzik qc->nbytes = buflen; 3589c6fd2807SJeff Garzik 359061c0596cSTejun Heo sg_init_one(&qc->sgent, buf, buflen); 3591c6fd2807SJeff Garzik } 3592c6fd2807SJeff Garzik 3593c6fd2807SJeff Garzik /** 3594c6fd2807SJeff Garzik * ata_sg_init - Associate command with scatter-gather table. 3595c6fd2807SJeff Garzik * @qc: Command to be associated 3596c6fd2807SJeff Garzik * @sg: Scatter-gather table. 3597c6fd2807SJeff Garzik * @n_elem: Number of elements in s/g table. 3598c6fd2807SJeff Garzik * 3599c6fd2807SJeff Garzik * Initialize the data-related elements of queued_cmd @qc 3600c6fd2807SJeff Garzik * to point to a scatter-gather table @sg, containing @n_elem 3601c6fd2807SJeff Garzik * elements. 3602c6fd2807SJeff Garzik * 3603c6fd2807SJeff Garzik * LOCKING: 3604cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 3605c6fd2807SJeff Garzik */ 3606c6fd2807SJeff Garzik 3607c6fd2807SJeff Garzik void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg, 3608c6fd2807SJeff Garzik unsigned int n_elem) 3609c6fd2807SJeff Garzik { 3610c6fd2807SJeff Garzik qc->flags |= ATA_QCFLAG_SG; 3611c6fd2807SJeff Garzik qc->__sg = sg; 3612c6fd2807SJeff Garzik qc->n_elem = n_elem; 3613c6fd2807SJeff Garzik qc->orig_n_elem = n_elem; 3614c6fd2807SJeff Garzik } 3615c6fd2807SJeff Garzik 3616c6fd2807SJeff Garzik /** 3617c6fd2807SJeff Garzik * ata_sg_setup_one - DMA-map the memory buffer associated with a command. 3618c6fd2807SJeff Garzik * @qc: Command with memory buffer to be mapped. 3619c6fd2807SJeff Garzik * 3620c6fd2807SJeff Garzik * DMA-map the memory buffer associated with queued_cmd @qc. 3621c6fd2807SJeff Garzik * 3622c6fd2807SJeff Garzik * LOCKING: 3623cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 3624c6fd2807SJeff Garzik * 3625c6fd2807SJeff Garzik * RETURNS: 3626c6fd2807SJeff Garzik * Zero on success, negative on error. 3627c6fd2807SJeff Garzik */ 3628c6fd2807SJeff Garzik 3629c6fd2807SJeff Garzik static int ata_sg_setup_one(struct ata_queued_cmd *qc) 3630c6fd2807SJeff Garzik { 3631c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 3632c6fd2807SJeff Garzik int dir = qc->dma_dir; 3633c6fd2807SJeff Garzik struct scatterlist *sg = qc->__sg; 3634c6fd2807SJeff Garzik dma_addr_t dma_address; 3635c6fd2807SJeff Garzik int trim_sg = 0; 3636c6fd2807SJeff Garzik 3637c6fd2807SJeff Garzik /* we must lengthen transfers to end on a 32-bit boundary */ 3638c6fd2807SJeff Garzik qc->pad_len = sg->length & 3; 3639c6fd2807SJeff Garzik if (qc->pad_len) { 3640c6fd2807SJeff Garzik void *pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ); 3641c6fd2807SJeff Garzik struct scatterlist *psg = &qc->pad_sgent; 3642c6fd2807SJeff Garzik 3643c6fd2807SJeff Garzik WARN_ON(qc->dev->class != ATA_DEV_ATAPI); 3644c6fd2807SJeff Garzik 3645c6fd2807SJeff Garzik memset(pad_buf, 0, ATA_DMA_PAD_SZ); 3646c6fd2807SJeff Garzik 3647c6fd2807SJeff Garzik if (qc->tf.flags & ATA_TFLAG_WRITE) 3648c6fd2807SJeff Garzik memcpy(pad_buf, qc->buf_virt + sg->length - qc->pad_len, 3649c6fd2807SJeff Garzik qc->pad_len); 3650c6fd2807SJeff Garzik 3651c6fd2807SJeff Garzik sg_dma_address(psg) = ap->pad_dma + (qc->tag * ATA_DMA_PAD_SZ); 3652c6fd2807SJeff Garzik sg_dma_len(psg) = ATA_DMA_PAD_SZ; 3653c6fd2807SJeff Garzik /* trim sg */ 3654c6fd2807SJeff Garzik sg->length -= qc->pad_len; 3655c6fd2807SJeff Garzik if (sg->length == 0) 3656c6fd2807SJeff Garzik trim_sg = 1; 3657c6fd2807SJeff Garzik 3658c6fd2807SJeff Garzik DPRINTK("padding done, sg->length=%u pad_len=%u\n", 3659c6fd2807SJeff Garzik sg->length, qc->pad_len); 3660c6fd2807SJeff Garzik } 3661c6fd2807SJeff Garzik 3662c6fd2807SJeff Garzik if (trim_sg) { 3663c6fd2807SJeff Garzik qc->n_elem--; 3664c6fd2807SJeff Garzik goto skip_map; 3665c6fd2807SJeff Garzik } 3666c6fd2807SJeff Garzik 3667c6fd2807SJeff Garzik dma_address = dma_map_single(ap->dev, qc->buf_virt, 3668c6fd2807SJeff Garzik sg->length, dir); 3669c6fd2807SJeff Garzik if (dma_mapping_error(dma_address)) { 3670c6fd2807SJeff Garzik /* restore sg */ 3671c6fd2807SJeff Garzik sg->length += qc->pad_len; 3672c6fd2807SJeff Garzik return -1; 3673c6fd2807SJeff Garzik } 3674c6fd2807SJeff Garzik 3675c6fd2807SJeff Garzik sg_dma_address(sg) = dma_address; 3676c6fd2807SJeff Garzik sg_dma_len(sg) = sg->length; 3677c6fd2807SJeff Garzik 3678c6fd2807SJeff Garzik skip_map: 3679c6fd2807SJeff Garzik DPRINTK("mapped buffer of %d bytes for %s\n", sg_dma_len(sg), 3680c6fd2807SJeff Garzik qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read"); 3681c6fd2807SJeff Garzik 3682c6fd2807SJeff Garzik return 0; 3683c6fd2807SJeff Garzik } 3684c6fd2807SJeff Garzik 3685c6fd2807SJeff Garzik /** 3686c6fd2807SJeff Garzik * ata_sg_setup - DMA-map the scatter-gather table associated with a command. 3687c6fd2807SJeff Garzik * @qc: Command with scatter-gather table to be mapped. 3688c6fd2807SJeff Garzik * 3689c6fd2807SJeff Garzik * DMA-map the scatter-gather table associated with queued_cmd @qc. 3690c6fd2807SJeff Garzik * 3691c6fd2807SJeff Garzik * LOCKING: 3692cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 3693c6fd2807SJeff Garzik * 3694c6fd2807SJeff Garzik * RETURNS: 3695c6fd2807SJeff Garzik * Zero on success, negative on error. 3696c6fd2807SJeff Garzik * 3697c6fd2807SJeff Garzik */ 3698c6fd2807SJeff Garzik 3699c6fd2807SJeff Garzik static int ata_sg_setup(struct ata_queued_cmd *qc) 3700c6fd2807SJeff Garzik { 3701c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 3702c6fd2807SJeff Garzik struct scatterlist *sg = qc->__sg; 3703c6fd2807SJeff Garzik struct scatterlist *lsg = &sg[qc->n_elem - 1]; 3704c6fd2807SJeff Garzik int n_elem, pre_n_elem, dir, trim_sg = 0; 3705c6fd2807SJeff Garzik 3706c6fd2807SJeff Garzik VPRINTK("ENTER, ata%u\n", ap->id); 3707c6fd2807SJeff Garzik WARN_ON(!(qc->flags & ATA_QCFLAG_SG)); 3708c6fd2807SJeff Garzik 3709c6fd2807SJeff Garzik /* we must lengthen transfers to end on a 32-bit boundary */ 3710c6fd2807SJeff Garzik qc->pad_len = lsg->length & 3; 3711c6fd2807SJeff Garzik if (qc->pad_len) { 3712c6fd2807SJeff Garzik void *pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ); 3713c6fd2807SJeff Garzik struct scatterlist *psg = &qc->pad_sgent; 3714c6fd2807SJeff Garzik unsigned int offset; 3715c6fd2807SJeff Garzik 3716c6fd2807SJeff Garzik WARN_ON(qc->dev->class != ATA_DEV_ATAPI); 3717c6fd2807SJeff Garzik 3718c6fd2807SJeff Garzik memset(pad_buf, 0, ATA_DMA_PAD_SZ); 3719c6fd2807SJeff Garzik 3720c6fd2807SJeff Garzik /* 3721c6fd2807SJeff Garzik * psg->page/offset are used to copy to-be-written 3722c6fd2807SJeff Garzik * data in this function or read data in ata_sg_clean. 3723c6fd2807SJeff Garzik */ 3724c6fd2807SJeff Garzik offset = lsg->offset + lsg->length - qc->pad_len; 3725c6fd2807SJeff Garzik psg->page = nth_page(lsg->page, offset >> PAGE_SHIFT); 3726c6fd2807SJeff Garzik psg->offset = offset_in_page(offset); 3727c6fd2807SJeff Garzik 3728c6fd2807SJeff Garzik if (qc->tf.flags & ATA_TFLAG_WRITE) { 3729c6fd2807SJeff Garzik void *addr = kmap_atomic(psg->page, KM_IRQ0); 3730c6fd2807SJeff Garzik memcpy(pad_buf, addr + psg->offset, qc->pad_len); 3731c6fd2807SJeff Garzik kunmap_atomic(addr, KM_IRQ0); 3732c6fd2807SJeff Garzik } 3733c6fd2807SJeff Garzik 3734c6fd2807SJeff Garzik sg_dma_address(psg) = ap->pad_dma + (qc->tag * ATA_DMA_PAD_SZ); 3735c6fd2807SJeff Garzik sg_dma_len(psg) = ATA_DMA_PAD_SZ; 3736c6fd2807SJeff Garzik /* trim last sg */ 3737c6fd2807SJeff Garzik lsg->length -= qc->pad_len; 3738c6fd2807SJeff Garzik if (lsg->length == 0) 3739c6fd2807SJeff Garzik trim_sg = 1; 3740c6fd2807SJeff Garzik 3741c6fd2807SJeff Garzik DPRINTK("padding done, sg[%d].length=%u pad_len=%u\n", 3742c6fd2807SJeff Garzik qc->n_elem - 1, lsg->length, qc->pad_len); 3743c6fd2807SJeff Garzik } 3744c6fd2807SJeff Garzik 3745c6fd2807SJeff Garzik pre_n_elem = qc->n_elem; 3746c6fd2807SJeff Garzik if (trim_sg && pre_n_elem) 3747c6fd2807SJeff Garzik pre_n_elem--; 3748c6fd2807SJeff Garzik 3749c6fd2807SJeff Garzik if (!pre_n_elem) { 3750c6fd2807SJeff Garzik n_elem = 0; 3751c6fd2807SJeff Garzik goto skip_map; 3752c6fd2807SJeff Garzik } 3753c6fd2807SJeff Garzik 3754c6fd2807SJeff Garzik dir = qc->dma_dir; 3755c6fd2807SJeff Garzik n_elem = dma_map_sg(ap->dev, sg, pre_n_elem, dir); 3756c6fd2807SJeff Garzik if (n_elem < 1) { 3757c6fd2807SJeff Garzik /* restore last sg */ 3758c6fd2807SJeff Garzik lsg->length += qc->pad_len; 3759c6fd2807SJeff Garzik return -1; 3760c6fd2807SJeff Garzik } 3761c6fd2807SJeff Garzik 3762c6fd2807SJeff Garzik DPRINTK("%d sg elements mapped\n", n_elem); 3763c6fd2807SJeff Garzik 3764c6fd2807SJeff Garzik skip_map: 3765c6fd2807SJeff Garzik qc->n_elem = n_elem; 3766c6fd2807SJeff Garzik 3767c6fd2807SJeff Garzik return 0; 3768c6fd2807SJeff Garzik } 3769c6fd2807SJeff Garzik 3770c6fd2807SJeff Garzik /** 3771c6fd2807SJeff Garzik * swap_buf_le16 - swap halves of 16-bit words in place 3772c6fd2807SJeff Garzik * @buf: Buffer to swap 3773c6fd2807SJeff Garzik * @buf_words: Number of 16-bit words in buffer. 3774c6fd2807SJeff Garzik * 3775c6fd2807SJeff Garzik * Swap halves of 16-bit words if needed to convert from 3776c6fd2807SJeff Garzik * little-endian byte order to native cpu byte order, or 3777c6fd2807SJeff Garzik * vice-versa. 3778c6fd2807SJeff Garzik * 3779c6fd2807SJeff Garzik * LOCKING: 3780c6fd2807SJeff Garzik * Inherited from caller. 3781c6fd2807SJeff Garzik */ 3782c6fd2807SJeff Garzik void swap_buf_le16(u16 *buf, unsigned int buf_words) 3783c6fd2807SJeff Garzik { 3784c6fd2807SJeff Garzik #ifdef __BIG_ENDIAN 3785c6fd2807SJeff Garzik unsigned int i; 3786c6fd2807SJeff Garzik 3787c6fd2807SJeff Garzik for (i = 0; i < buf_words; i++) 3788c6fd2807SJeff Garzik buf[i] = le16_to_cpu(buf[i]); 3789c6fd2807SJeff Garzik #endif /* __BIG_ENDIAN */ 3790c6fd2807SJeff Garzik } 3791c6fd2807SJeff Garzik 3792c6fd2807SJeff Garzik /** 37930d5ff566STejun Heo * ata_data_xfer - Transfer data by PIO 3794c6fd2807SJeff Garzik * @adev: device to target 3795c6fd2807SJeff Garzik * @buf: data buffer 3796c6fd2807SJeff Garzik * @buflen: buffer length 3797c6fd2807SJeff Garzik * @write_data: read/write 3798c6fd2807SJeff Garzik * 3799c6fd2807SJeff Garzik * Transfer data from/to the device data register by PIO. 3800c6fd2807SJeff Garzik * 3801c6fd2807SJeff Garzik * LOCKING: 3802c6fd2807SJeff Garzik * Inherited from caller. 3803c6fd2807SJeff Garzik */ 38040d5ff566STejun Heo void ata_data_xfer(struct ata_device *adev, unsigned char *buf, 3805c6fd2807SJeff Garzik unsigned int buflen, int write_data) 3806c6fd2807SJeff Garzik { 3807c6fd2807SJeff Garzik struct ata_port *ap = adev->ap; 3808c6fd2807SJeff Garzik unsigned int words = buflen >> 1; 3809c6fd2807SJeff Garzik 3810c6fd2807SJeff Garzik /* Transfer multiple of 2 bytes */ 3811c6fd2807SJeff Garzik if (write_data) 38120d5ff566STejun Heo iowrite16_rep(ap->ioaddr.data_addr, buf, words); 3813c6fd2807SJeff Garzik else 38140d5ff566STejun Heo ioread16_rep(ap->ioaddr.data_addr, buf, words); 3815c6fd2807SJeff Garzik 3816c6fd2807SJeff Garzik /* Transfer trailing 1 byte, if any. */ 3817c6fd2807SJeff Garzik if (unlikely(buflen & 0x01)) { 3818c6fd2807SJeff Garzik u16 align_buf[1] = { 0 }; 3819c6fd2807SJeff Garzik unsigned char *trailing_buf = buf + buflen - 1; 3820c6fd2807SJeff Garzik 3821c6fd2807SJeff Garzik if (write_data) { 3822c6fd2807SJeff Garzik memcpy(align_buf, trailing_buf, 1); 38230d5ff566STejun Heo iowrite16(le16_to_cpu(align_buf[0]), ap->ioaddr.data_addr); 3824c6fd2807SJeff Garzik } else { 38250d5ff566STejun Heo align_buf[0] = cpu_to_le16(ioread16(ap->ioaddr.data_addr)); 3826c6fd2807SJeff Garzik memcpy(trailing_buf, align_buf, 1); 3827c6fd2807SJeff Garzik } 3828c6fd2807SJeff Garzik } 3829c6fd2807SJeff Garzik } 3830c6fd2807SJeff Garzik 3831c6fd2807SJeff Garzik /** 38320d5ff566STejun Heo * ata_data_xfer_noirq - Transfer data by PIO 3833c6fd2807SJeff Garzik * @adev: device to target 3834c6fd2807SJeff Garzik * @buf: data buffer 3835c6fd2807SJeff Garzik * @buflen: buffer length 3836c6fd2807SJeff Garzik * @write_data: read/write 3837c6fd2807SJeff Garzik * 3838c6fd2807SJeff Garzik * Transfer data from/to the device data register by PIO. Do the 3839c6fd2807SJeff Garzik * transfer with interrupts disabled. 3840c6fd2807SJeff Garzik * 3841c6fd2807SJeff Garzik * LOCKING: 3842c6fd2807SJeff Garzik * Inherited from caller. 3843c6fd2807SJeff Garzik */ 38440d5ff566STejun Heo void ata_data_xfer_noirq(struct ata_device *adev, unsigned char *buf, 3845c6fd2807SJeff Garzik unsigned int buflen, int write_data) 3846c6fd2807SJeff Garzik { 3847c6fd2807SJeff Garzik unsigned long flags; 3848c6fd2807SJeff Garzik local_irq_save(flags); 38490d5ff566STejun Heo ata_data_xfer(adev, buf, buflen, write_data); 3850c6fd2807SJeff Garzik local_irq_restore(flags); 3851c6fd2807SJeff Garzik } 3852c6fd2807SJeff Garzik 3853c6fd2807SJeff Garzik 3854c6fd2807SJeff Garzik /** 3855c6fd2807SJeff Garzik * ata_pio_sector - Transfer ATA_SECT_SIZE (512 bytes) of data. 3856c6fd2807SJeff Garzik * @qc: Command on going 3857c6fd2807SJeff Garzik * 3858c6fd2807SJeff Garzik * Transfer ATA_SECT_SIZE of data from/to the ATA device. 3859c6fd2807SJeff Garzik * 3860c6fd2807SJeff Garzik * LOCKING: 3861c6fd2807SJeff Garzik * Inherited from caller. 3862c6fd2807SJeff Garzik */ 3863c6fd2807SJeff Garzik 3864c6fd2807SJeff Garzik static void ata_pio_sector(struct ata_queued_cmd *qc) 3865c6fd2807SJeff Garzik { 3866c6fd2807SJeff Garzik int do_write = (qc->tf.flags & ATA_TFLAG_WRITE); 3867c6fd2807SJeff Garzik struct scatterlist *sg = qc->__sg; 3868c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 3869c6fd2807SJeff Garzik struct page *page; 3870c6fd2807SJeff Garzik unsigned int offset; 3871c6fd2807SJeff Garzik unsigned char *buf; 3872c6fd2807SJeff Garzik 3873726f0785STejun Heo if (qc->curbytes == qc->nbytes - ATA_SECT_SIZE) 3874c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_LAST; 3875c6fd2807SJeff Garzik 3876c6fd2807SJeff Garzik page = sg[qc->cursg].page; 3877726f0785STejun Heo offset = sg[qc->cursg].offset + qc->cursg_ofs; 3878c6fd2807SJeff Garzik 3879c6fd2807SJeff Garzik /* get the current page and offset */ 3880c6fd2807SJeff Garzik page = nth_page(page, (offset >> PAGE_SHIFT)); 3881c6fd2807SJeff Garzik offset %= PAGE_SIZE; 3882c6fd2807SJeff Garzik 3883c6fd2807SJeff Garzik DPRINTK("data %s\n", qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read"); 3884c6fd2807SJeff Garzik 3885c6fd2807SJeff Garzik if (PageHighMem(page)) { 3886c6fd2807SJeff Garzik unsigned long flags; 3887c6fd2807SJeff Garzik 3888c6fd2807SJeff Garzik /* FIXME: use a bounce buffer */ 3889c6fd2807SJeff Garzik local_irq_save(flags); 3890c6fd2807SJeff Garzik buf = kmap_atomic(page, KM_IRQ0); 3891c6fd2807SJeff Garzik 3892c6fd2807SJeff Garzik /* do the actual data transfer */ 3893c6fd2807SJeff Garzik ap->ops->data_xfer(qc->dev, buf + offset, ATA_SECT_SIZE, do_write); 3894c6fd2807SJeff Garzik 3895c6fd2807SJeff Garzik kunmap_atomic(buf, KM_IRQ0); 3896c6fd2807SJeff Garzik local_irq_restore(flags); 3897c6fd2807SJeff Garzik } else { 3898c6fd2807SJeff Garzik buf = page_address(page); 3899c6fd2807SJeff Garzik ap->ops->data_xfer(qc->dev, buf + offset, ATA_SECT_SIZE, do_write); 3900c6fd2807SJeff Garzik } 3901c6fd2807SJeff Garzik 3902726f0785STejun Heo qc->curbytes += ATA_SECT_SIZE; 3903726f0785STejun Heo qc->cursg_ofs += ATA_SECT_SIZE; 3904c6fd2807SJeff Garzik 3905726f0785STejun Heo if (qc->cursg_ofs == (&sg[qc->cursg])->length) { 3906c6fd2807SJeff Garzik qc->cursg++; 3907c6fd2807SJeff Garzik qc->cursg_ofs = 0; 3908c6fd2807SJeff Garzik } 3909c6fd2807SJeff Garzik } 3910c6fd2807SJeff Garzik 3911c6fd2807SJeff Garzik /** 3912c6fd2807SJeff Garzik * ata_pio_sectors - Transfer one or many 512-byte sectors. 3913c6fd2807SJeff Garzik * @qc: Command on going 3914c6fd2807SJeff Garzik * 3915c6fd2807SJeff Garzik * Transfer one or many ATA_SECT_SIZE of data from/to the 3916c6fd2807SJeff Garzik * ATA device for the DRQ request. 3917c6fd2807SJeff Garzik * 3918c6fd2807SJeff Garzik * LOCKING: 3919c6fd2807SJeff Garzik * Inherited from caller. 3920c6fd2807SJeff Garzik */ 3921c6fd2807SJeff Garzik 3922c6fd2807SJeff Garzik static void ata_pio_sectors(struct ata_queued_cmd *qc) 3923c6fd2807SJeff Garzik { 3924c6fd2807SJeff Garzik if (is_multi_taskfile(&qc->tf)) { 3925c6fd2807SJeff Garzik /* READ/WRITE MULTIPLE */ 3926c6fd2807SJeff Garzik unsigned int nsect; 3927c6fd2807SJeff Garzik 3928c6fd2807SJeff Garzik WARN_ON(qc->dev->multi_count == 0); 3929c6fd2807SJeff Garzik 3930726f0785STejun Heo nsect = min((qc->nbytes - qc->curbytes) / ATA_SECT_SIZE, 3931726f0785STejun Heo qc->dev->multi_count); 3932c6fd2807SJeff Garzik while (nsect--) 3933c6fd2807SJeff Garzik ata_pio_sector(qc); 3934c6fd2807SJeff Garzik } else 3935c6fd2807SJeff Garzik ata_pio_sector(qc); 3936c6fd2807SJeff Garzik } 3937c6fd2807SJeff Garzik 3938c6fd2807SJeff Garzik /** 3939c6fd2807SJeff Garzik * atapi_send_cdb - Write CDB bytes to hardware 3940c6fd2807SJeff Garzik * @ap: Port to which ATAPI device is attached. 3941c6fd2807SJeff Garzik * @qc: Taskfile currently active 3942c6fd2807SJeff Garzik * 3943c6fd2807SJeff Garzik * When device has indicated its readiness to accept 3944c6fd2807SJeff Garzik * a CDB, this function is called. Send the CDB. 3945c6fd2807SJeff Garzik * 3946c6fd2807SJeff Garzik * LOCKING: 3947c6fd2807SJeff Garzik * caller. 3948c6fd2807SJeff Garzik */ 3949c6fd2807SJeff Garzik 3950c6fd2807SJeff Garzik static void atapi_send_cdb(struct ata_port *ap, struct ata_queued_cmd *qc) 3951c6fd2807SJeff Garzik { 3952c6fd2807SJeff Garzik /* send SCSI cdb */ 3953c6fd2807SJeff Garzik DPRINTK("send cdb\n"); 3954c6fd2807SJeff Garzik WARN_ON(qc->dev->cdb_len < 12); 3955c6fd2807SJeff Garzik 3956c6fd2807SJeff Garzik ap->ops->data_xfer(qc->dev, qc->cdb, qc->dev->cdb_len, 1); 3957c6fd2807SJeff Garzik ata_altstatus(ap); /* flush */ 3958c6fd2807SJeff Garzik 3959c6fd2807SJeff Garzik switch (qc->tf.protocol) { 3960c6fd2807SJeff Garzik case ATA_PROT_ATAPI: 3961c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST; 3962c6fd2807SJeff Garzik break; 3963c6fd2807SJeff Garzik case ATA_PROT_ATAPI_NODATA: 3964c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_LAST; 3965c6fd2807SJeff Garzik break; 3966c6fd2807SJeff Garzik case ATA_PROT_ATAPI_DMA: 3967c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_LAST; 3968c6fd2807SJeff Garzik /* initiate bmdma */ 3969c6fd2807SJeff Garzik ap->ops->bmdma_start(qc); 3970c6fd2807SJeff Garzik break; 3971c6fd2807SJeff Garzik } 3972c6fd2807SJeff Garzik } 3973c6fd2807SJeff Garzik 3974c6fd2807SJeff Garzik /** 3975c6fd2807SJeff Garzik * __atapi_pio_bytes - Transfer data from/to the ATAPI device. 3976c6fd2807SJeff Garzik * @qc: Command on going 3977c6fd2807SJeff Garzik * @bytes: number of bytes 3978c6fd2807SJeff Garzik * 3979c6fd2807SJeff Garzik * Transfer Transfer data from/to the ATAPI device. 3980c6fd2807SJeff Garzik * 3981c6fd2807SJeff Garzik * LOCKING: 3982c6fd2807SJeff Garzik * Inherited from caller. 3983c6fd2807SJeff Garzik * 3984c6fd2807SJeff Garzik */ 3985c6fd2807SJeff Garzik 3986c6fd2807SJeff Garzik static void __atapi_pio_bytes(struct ata_queued_cmd *qc, unsigned int bytes) 3987c6fd2807SJeff Garzik { 3988c6fd2807SJeff Garzik int do_write = (qc->tf.flags & ATA_TFLAG_WRITE); 3989c6fd2807SJeff Garzik struct scatterlist *sg = qc->__sg; 3990c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 3991c6fd2807SJeff Garzik struct page *page; 3992c6fd2807SJeff Garzik unsigned char *buf; 3993c6fd2807SJeff Garzik unsigned int offset, count; 3994c6fd2807SJeff Garzik 3995c6fd2807SJeff Garzik if (qc->curbytes + bytes >= qc->nbytes) 3996c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_LAST; 3997c6fd2807SJeff Garzik 3998c6fd2807SJeff Garzik next_sg: 3999c6fd2807SJeff Garzik if (unlikely(qc->cursg >= qc->n_elem)) { 4000c6fd2807SJeff Garzik /* 4001c6fd2807SJeff Garzik * The end of qc->sg is reached and the device expects 4002c6fd2807SJeff Garzik * more data to transfer. In order not to overrun qc->sg 4003c6fd2807SJeff Garzik * and fulfill length specified in the byte count register, 4004c6fd2807SJeff Garzik * - for read case, discard trailing data from the device 4005c6fd2807SJeff Garzik * - for write case, padding zero data to the device 4006c6fd2807SJeff Garzik */ 4007c6fd2807SJeff Garzik u16 pad_buf[1] = { 0 }; 4008c6fd2807SJeff Garzik unsigned int words = bytes >> 1; 4009c6fd2807SJeff Garzik unsigned int i; 4010c6fd2807SJeff Garzik 4011c6fd2807SJeff Garzik if (words) /* warning if bytes > 1 */ 4012c6fd2807SJeff Garzik ata_dev_printk(qc->dev, KERN_WARNING, 4013c6fd2807SJeff Garzik "%u bytes trailing data\n", bytes); 4014c6fd2807SJeff Garzik 4015c6fd2807SJeff Garzik for (i = 0; i < words; i++) 4016c6fd2807SJeff Garzik ap->ops->data_xfer(qc->dev, (unsigned char*)pad_buf, 2, do_write); 4017c6fd2807SJeff Garzik 4018c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_LAST; 4019c6fd2807SJeff Garzik return; 4020c6fd2807SJeff Garzik } 4021c6fd2807SJeff Garzik 4022c6fd2807SJeff Garzik sg = &qc->__sg[qc->cursg]; 4023c6fd2807SJeff Garzik 4024c6fd2807SJeff Garzik page = sg->page; 4025c6fd2807SJeff Garzik offset = sg->offset + qc->cursg_ofs; 4026c6fd2807SJeff Garzik 4027c6fd2807SJeff Garzik /* get the current page and offset */ 4028c6fd2807SJeff Garzik page = nth_page(page, (offset >> PAGE_SHIFT)); 4029c6fd2807SJeff Garzik offset %= PAGE_SIZE; 4030c6fd2807SJeff Garzik 4031c6fd2807SJeff Garzik /* don't overrun current sg */ 4032c6fd2807SJeff Garzik count = min(sg->length - qc->cursg_ofs, bytes); 4033c6fd2807SJeff Garzik 4034c6fd2807SJeff Garzik /* don't cross page boundaries */ 4035c6fd2807SJeff Garzik count = min(count, (unsigned int)PAGE_SIZE - offset); 4036c6fd2807SJeff Garzik 4037c6fd2807SJeff Garzik DPRINTK("data %s\n", qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read"); 4038c6fd2807SJeff Garzik 4039c6fd2807SJeff Garzik if (PageHighMem(page)) { 4040c6fd2807SJeff Garzik unsigned long flags; 4041c6fd2807SJeff Garzik 4042c6fd2807SJeff Garzik /* FIXME: use bounce buffer */ 4043c6fd2807SJeff Garzik local_irq_save(flags); 4044c6fd2807SJeff Garzik buf = kmap_atomic(page, KM_IRQ0); 4045c6fd2807SJeff Garzik 4046c6fd2807SJeff Garzik /* do the actual data transfer */ 4047c6fd2807SJeff Garzik ap->ops->data_xfer(qc->dev, buf + offset, count, do_write); 4048c6fd2807SJeff Garzik 4049c6fd2807SJeff Garzik kunmap_atomic(buf, KM_IRQ0); 4050c6fd2807SJeff Garzik local_irq_restore(flags); 4051c6fd2807SJeff Garzik } else { 4052c6fd2807SJeff Garzik buf = page_address(page); 4053c6fd2807SJeff Garzik ap->ops->data_xfer(qc->dev, buf + offset, count, do_write); 4054c6fd2807SJeff Garzik } 4055c6fd2807SJeff Garzik 4056c6fd2807SJeff Garzik bytes -= count; 4057c6fd2807SJeff Garzik qc->curbytes += count; 4058c6fd2807SJeff Garzik qc->cursg_ofs += count; 4059c6fd2807SJeff Garzik 4060c6fd2807SJeff Garzik if (qc->cursg_ofs == sg->length) { 4061c6fd2807SJeff Garzik qc->cursg++; 4062c6fd2807SJeff Garzik qc->cursg_ofs = 0; 4063c6fd2807SJeff Garzik } 4064c6fd2807SJeff Garzik 4065c6fd2807SJeff Garzik if (bytes) 4066c6fd2807SJeff Garzik goto next_sg; 4067c6fd2807SJeff Garzik } 4068c6fd2807SJeff Garzik 4069c6fd2807SJeff Garzik /** 4070c6fd2807SJeff Garzik * atapi_pio_bytes - Transfer data from/to the ATAPI device. 4071c6fd2807SJeff Garzik * @qc: Command on going 4072c6fd2807SJeff Garzik * 4073c6fd2807SJeff Garzik * Transfer Transfer data from/to the ATAPI device. 4074c6fd2807SJeff Garzik * 4075c6fd2807SJeff Garzik * LOCKING: 4076c6fd2807SJeff Garzik * Inherited from caller. 4077c6fd2807SJeff Garzik */ 4078c6fd2807SJeff Garzik 4079c6fd2807SJeff Garzik static void atapi_pio_bytes(struct ata_queued_cmd *qc) 4080c6fd2807SJeff Garzik { 4081c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 4082c6fd2807SJeff Garzik struct ata_device *dev = qc->dev; 4083c6fd2807SJeff Garzik unsigned int ireason, bc_lo, bc_hi, bytes; 4084c6fd2807SJeff Garzik int i_write, do_write = (qc->tf.flags & ATA_TFLAG_WRITE) ? 1 : 0; 4085c6fd2807SJeff Garzik 4086c6fd2807SJeff Garzik /* Abuse qc->result_tf for temp storage of intermediate TF 4087c6fd2807SJeff Garzik * here to save some kernel stack usage. 4088c6fd2807SJeff Garzik * For normal completion, qc->result_tf is not relevant. For 4089c6fd2807SJeff Garzik * error, qc->result_tf is later overwritten by ata_qc_complete(). 4090c6fd2807SJeff Garzik * So, the correctness of qc->result_tf is not affected. 4091c6fd2807SJeff Garzik */ 4092c6fd2807SJeff Garzik ap->ops->tf_read(ap, &qc->result_tf); 4093c6fd2807SJeff Garzik ireason = qc->result_tf.nsect; 4094c6fd2807SJeff Garzik bc_lo = qc->result_tf.lbam; 4095c6fd2807SJeff Garzik bc_hi = qc->result_tf.lbah; 4096c6fd2807SJeff Garzik bytes = (bc_hi << 8) | bc_lo; 4097c6fd2807SJeff Garzik 4098c6fd2807SJeff Garzik /* shall be cleared to zero, indicating xfer of data */ 4099c6fd2807SJeff Garzik if (ireason & (1 << 0)) 4100c6fd2807SJeff Garzik goto err_out; 4101c6fd2807SJeff Garzik 4102c6fd2807SJeff Garzik /* make sure transfer direction matches expected */ 4103c6fd2807SJeff Garzik i_write = ((ireason & (1 << 1)) == 0) ? 1 : 0; 4104c6fd2807SJeff Garzik if (do_write != i_write) 4105c6fd2807SJeff Garzik goto err_out; 4106c6fd2807SJeff Garzik 4107c6fd2807SJeff Garzik VPRINTK("ata%u: xfering %d bytes\n", ap->id, bytes); 4108c6fd2807SJeff Garzik 4109c6fd2807SJeff Garzik __atapi_pio_bytes(qc, bytes); 4110c6fd2807SJeff Garzik 4111c6fd2807SJeff Garzik return; 4112c6fd2807SJeff Garzik 4113c6fd2807SJeff Garzik err_out: 4114c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_INFO, "ATAPI check failed\n"); 4115c6fd2807SJeff Garzik qc->err_mask |= AC_ERR_HSM; 4116c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_ERR; 4117c6fd2807SJeff Garzik } 4118c6fd2807SJeff Garzik 4119c6fd2807SJeff Garzik /** 4120c6fd2807SJeff Garzik * ata_hsm_ok_in_wq - Check if the qc can be handled in the workqueue. 4121c6fd2807SJeff Garzik * @ap: the target ata_port 4122c6fd2807SJeff Garzik * @qc: qc on going 4123c6fd2807SJeff Garzik * 4124c6fd2807SJeff Garzik * RETURNS: 4125c6fd2807SJeff Garzik * 1 if ok in workqueue, 0 otherwise. 4126c6fd2807SJeff Garzik */ 4127c6fd2807SJeff Garzik 4128c6fd2807SJeff Garzik static inline int ata_hsm_ok_in_wq(struct ata_port *ap, struct ata_queued_cmd *qc) 4129c6fd2807SJeff Garzik { 4130c6fd2807SJeff Garzik if (qc->tf.flags & ATA_TFLAG_POLLING) 4131c6fd2807SJeff Garzik return 1; 4132c6fd2807SJeff Garzik 4133c6fd2807SJeff Garzik if (ap->hsm_task_state == HSM_ST_FIRST) { 4134c6fd2807SJeff Garzik if (qc->tf.protocol == ATA_PROT_PIO && 4135c6fd2807SJeff Garzik (qc->tf.flags & ATA_TFLAG_WRITE)) 4136c6fd2807SJeff Garzik return 1; 4137c6fd2807SJeff Garzik 4138c6fd2807SJeff Garzik if (is_atapi_taskfile(&qc->tf) && 4139c6fd2807SJeff Garzik !(qc->dev->flags & ATA_DFLAG_CDB_INTR)) 4140c6fd2807SJeff Garzik return 1; 4141c6fd2807SJeff Garzik } 4142c6fd2807SJeff Garzik 4143c6fd2807SJeff Garzik return 0; 4144c6fd2807SJeff Garzik } 4145c6fd2807SJeff Garzik 4146c6fd2807SJeff Garzik /** 4147c6fd2807SJeff Garzik * ata_hsm_qc_complete - finish a qc running on standard HSM 4148c6fd2807SJeff Garzik * @qc: Command to complete 4149c6fd2807SJeff Garzik * @in_wq: 1 if called from workqueue, 0 otherwise 4150c6fd2807SJeff Garzik * 4151c6fd2807SJeff Garzik * Finish @qc which is running on standard HSM. 4152c6fd2807SJeff Garzik * 4153c6fd2807SJeff Garzik * LOCKING: 4154cca3974eSJeff Garzik * If @in_wq is zero, spin_lock_irqsave(host lock). 4155c6fd2807SJeff Garzik * Otherwise, none on entry and grabs host lock. 4156c6fd2807SJeff Garzik */ 4157c6fd2807SJeff Garzik static void ata_hsm_qc_complete(struct ata_queued_cmd *qc, int in_wq) 4158c6fd2807SJeff Garzik { 4159c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 4160c6fd2807SJeff Garzik unsigned long flags; 4161c6fd2807SJeff Garzik 4162c6fd2807SJeff Garzik if (ap->ops->error_handler) { 4163c6fd2807SJeff Garzik if (in_wq) { 4164c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 4165c6fd2807SJeff Garzik 4166cca3974eSJeff Garzik /* EH might have kicked in while host lock is 4167cca3974eSJeff Garzik * released. 4168c6fd2807SJeff Garzik */ 4169c6fd2807SJeff Garzik qc = ata_qc_from_tag(ap, qc->tag); 4170c6fd2807SJeff Garzik if (qc) { 4171c6fd2807SJeff Garzik if (likely(!(qc->err_mask & AC_ERR_HSM))) { 4172c6fd2807SJeff Garzik ata_irq_on(ap); 4173c6fd2807SJeff Garzik ata_qc_complete(qc); 4174c6fd2807SJeff Garzik } else 4175c6fd2807SJeff Garzik ata_port_freeze(ap); 4176c6fd2807SJeff Garzik } 4177c6fd2807SJeff Garzik 4178c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 4179c6fd2807SJeff Garzik } else { 4180c6fd2807SJeff Garzik if (likely(!(qc->err_mask & AC_ERR_HSM))) 4181c6fd2807SJeff Garzik ata_qc_complete(qc); 4182c6fd2807SJeff Garzik else 4183c6fd2807SJeff Garzik ata_port_freeze(ap); 4184c6fd2807SJeff Garzik } 4185c6fd2807SJeff Garzik } else { 4186c6fd2807SJeff Garzik if (in_wq) { 4187c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 4188c6fd2807SJeff Garzik ata_irq_on(ap); 4189c6fd2807SJeff Garzik ata_qc_complete(qc); 4190c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 4191c6fd2807SJeff Garzik } else 4192c6fd2807SJeff Garzik ata_qc_complete(qc); 4193c6fd2807SJeff Garzik } 4194c6fd2807SJeff Garzik 4195c6fd2807SJeff Garzik ata_altstatus(ap); /* flush */ 4196c6fd2807SJeff Garzik } 4197c6fd2807SJeff Garzik 4198c6fd2807SJeff Garzik /** 4199c6fd2807SJeff Garzik * ata_hsm_move - move the HSM to the next state. 4200c6fd2807SJeff Garzik * @ap: the target ata_port 4201c6fd2807SJeff Garzik * @qc: qc on going 4202c6fd2807SJeff Garzik * @status: current device status 4203c6fd2807SJeff Garzik * @in_wq: 1 if called from workqueue, 0 otherwise 4204c6fd2807SJeff Garzik * 4205c6fd2807SJeff Garzik * RETURNS: 4206c6fd2807SJeff Garzik * 1 when poll next status needed, 0 otherwise. 4207c6fd2807SJeff Garzik */ 4208c6fd2807SJeff Garzik int ata_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc, 4209c6fd2807SJeff Garzik u8 status, int in_wq) 4210c6fd2807SJeff Garzik { 4211c6fd2807SJeff Garzik unsigned long flags = 0; 4212c6fd2807SJeff Garzik int poll_next; 4213c6fd2807SJeff Garzik 4214c6fd2807SJeff Garzik WARN_ON((qc->flags & ATA_QCFLAG_ACTIVE) == 0); 4215c6fd2807SJeff Garzik 4216c6fd2807SJeff Garzik /* Make sure ata_qc_issue_prot() does not throw things 4217c6fd2807SJeff Garzik * like DMA polling into the workqueue. Notice that 4218c6fd2807SJeff Garzik * in_wq is not equivalent to (qc->tf.flags & ATA_TFLAG_POLLING). 4219c6fd2807SJeff Garzik */ 4220c6fd2807SJeff Garzik WARN_ON(in_wq != ata_hsm_ok_in_wq(ap, qc)); 4221c6fd2807SJeff Garzik 4222c6fd2807SJeff Garzik fsm_start: 4223c6fd2807SJeff Garzik DPRINTK("ata%u: protocol %d task_state %d (dev_stat 0x%X)\n", 4224c6fd2807SJeff Garzik ap->id, qc->tf.protocol, ap->hsm_task_state, status); 4225c6fd2807SJeff Garzik 4226c6fd2807SJeff Garzik switch (ap->hsm_task_state) { 4227c6fd2807SJeff Garzik case HSM_ST_FIRST: 4228c6fd2807SJeff Garzik /* Send first data block or PACKET CDB */ 4229c6fd2807SJeff Garzik 4230c6fd2807SJeff Garzik /* If polling, we will stay in the work queue after 4231c6fd2807SJeff Garzik * sending the data. Otherwise, interrupt handler 4232c6fd2807SJeff Garzik * takes over after sending the data. 4233c6fd2807SJeff Garzik */ 4234c6fd2807SJeff Garzik poll_next = (qc->tf.flags & ATA_TFLAG_POLLING); 4235c6fd2807SJeff Garzik 4236c6fd2807SJeff Garzik /* check device status */ 4237c6fd2807SJeff Garzik if (unlikely((status & ATA_DRQ) == 0)) { 4238c6fd2807SJeff Garzik /* handle BSY=0, DRQ=0 as error */ 4239c6fd2807SJeff Garzik if (likely(status & (ATA_ERR | ATA_DF))) 4240c6fd2807SJeff Garzik /* device stops HSM for abort/error */ 4241c6fd2807SJeff Garzik qc->err_mask |= AC_ERR_DEV; 4242c6fd2807SJeff Garzik else 4243c6fd2807SJeff Garzik /* HSM violation. Let EH handle this */ 4244c6fd2807SJeff Garzik qc->err_mask |= AC_ERR_HSM; 4245c6fd2807SJeff Garzik 4246c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_ERR; 4247c6fd2807SJeff Garzik goto fsm_start; 4248c6fd2807SJeff Garzik } 4249c6fd2807SJeff Garzik 4250c6fd2807SJeff Garzik /* Device should not ask for data transfer (DRQ=1) 4251c6fd2807SJeff Garzik * when it finds something wrong. 4252c6fd2807SJeff Garzik * We ignore DRQ here and stop the HSM by 4253c6fd2807SJeff Garzik * changing hsm_task_state to HSM_ST_ERR and 4254c6fd2807SJeff Garzik * let the EH abort the command or reset the device. 4255c6fd2807SJeff Garzik */ 4256c6fd2807SJeff Garzik if (unlikely(status & (ATA_ERR | ATA_DF))) { 4257c6fd2807SJeff Garzik printk(KERN_WARNING "ata%d: DRQ=1 with device error, dev_stat 0x%X\n", 4258c6fd2807SJeff Garzik ap->id, status); 4259c6fd2807SJeff Garzik qc->err_mask |= AC_ERR_HSM; 4260c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_ERR; 4261c6fd2807SJeff Garzik goto fsm_start; 4262c6fd2807SJeff Garzik } 4263c6fd2807SJeff Garzik 4264c6fd2807SJeff Garzik /* Send the CDB (atapi) or the first data block (ata pio out). 4265c6fd2807SJeff Garzik * During the state transition, interrupt handler shouldn't 4266c6fd2807SJeff Garzik * be invoked before the data transfer is complete and 4267c6fd2807SJeff Garzik * hsm_task_state is changed. Hence, the following locking. 4268c6fd2807SJeff Garzik */ 4269c6fd2807SJeff Garzik if (in_wq) 4270c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 4271c6fd2807SJeff Garzik 4272c6fd2807SJeff Garzik if (qc->tf.protocol == ATA_PROT_PIO) { 4273c6fd2807SJeff Garzik /* PIO data out protocol. 4274c6fd2807SJeff Garzik * send first data block. 4275c6fd2807SJeff Garzik */ 4276c6fd2807SJeff Garzik 4277c6fd2807SJeff Garzik /* ata_pio_sectors() might change the state 4278c6fd2807SJeff Garzik * to HSM_ST_LAST. so, the state is changed here 4279c6fd2807SJeff Garzik * before ata_pio_sectors(). 4280c6fd2807SJeff Garzik */ 4281c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST; 4282c6fd2807SJeff Garzik ata_pio_sectors(qc); 4283c6fd2807SJeff Garzik ata_altstatus(ap); /* flush */ 4284c6fd2807SJeff Garzik } else 4285c6fd2807SJeff Garzik /* send CDB */ 4286c6fd2807SJeff Garzik atapi_send_cdb(ap, qc); 4287c6fd2807SJeff Garzik 4288c6fd2807SJeff Garzik if (in_wq) 4289c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 4290c6fd2807SJeff Garzik 4291c6fd2807SJeff Garzik /* if polling, ata_pio_task() handles the rest. 4292c6fd2807SJeff Garzik * otherwise, interrupt handler takes over from here. 4293c6fd2807SJeff Garzik */ 4294c6fd2807SJeff Garzik break; 4295c6fd2807SJeff Garzik 4296c6fd2807SJeff Garzik case HSM_ST: 4297c6fd2807SJeff Garzik /* complete command or read/write the data register */ 4298c6fd2807SJeff Garzik if (qc->tf.protocol == ATA_PROT_ATAPI) { 4299c6fd2807SJeff Garzik /* ATAPI PIO protocol */ 4300c6fd2807SJeff Garzik if ((status & ATA_DRQ) == 0) { 4301c6fd2807SJeff Garzik /* No more data to transfer or device error. 4302c6fd2807SJeff Garzik * Device error will be tagged in HSM_ST_LAST. 4303c6fd2807SJeff Garzik */ 4304c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_LAST; 4305c6fd2807SJeff Garzik goto fsm_start; 4306c6fd2807SJeff Garzik } 4307c6fd2807SJeff Garzik 4308c6fd2807SJeff Garzik /* Device should not ask for data transfer (DRQ=1) 4309c6fd2807SJeff Garzik * when it finds something wrong. 4310c6fd2807SJeff Garzik * We ignore DRQ here and stop the HSM by 4311c6fd2807SJeff Garzik * changing hsm_task_state to HSM_ST_ERR and 4312c6fd2807SJeff Garzik * let the EH abort the command or reset the device. 4313c6fd2807SJeff Garzik */ 4314c6fd2807SJeff Garzik if (unlikely(status & (ATA_ERR | ATA_DF))) { 4315c6fd2807SJeff Garzik printk(KERN_WARNING "ata%d: DRQ=1 with device error, dev_stat 0x%X\n", 4316c6fd2807SJeff Garzik ap->id, status); 4317c6fd2807SJeff Garzik qc->err_mask |= AC_ERR_HSM; 4318c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_ERR; 4319c6fd2807SJeff Garzik goto fsm_start; 4320c6fd2807SJeff Garzik } 4321c6fd2807SJeff Garzik 4322c6fd2807SJeff Garzik atapi_pio_bytes(qc); 4323c6fd2807SJeff Garzik 4324c6fd2807SJeff Garzik if (unlikely(ap->hsm_task_state == HSM_ST_ERR)) 4325c6fd2807SJeff Garzik /* bad ireason reported by device */ 4326c6fd2807SJeff Garzik goto fsm_start; 4327c6fd2807SJeff Garzik 4328c6fd2807SJeff Garzik } else { 4329c6fd2807SJeff Garzik /* ATA PIO protocol */ 4330c6fd2807SJeff Garzik if (unlikely((status & ATA_DRQ) == 0)) { 4331c6fd2807SJeff Garzik /* handle BSY=0, DRQ=0 as error */ 4332c6fd2807SJeff Garzik if (likely(status & (ATA_ERR | ATA_DF))) 4333c6fd2807SJeff Garzik /* device stops HSM for abort/error */ 4334c6fd2807SJeff Garzik qc->err_mask |= AC_ERR_DEV; 4335c6fd2807SJeff Garzik else 433655a8e2c8STejun Heo /* HSM violation. Let EH handle this. 433755a8e2c8STejun Heo * Phantom devices also trigger this 433855a8e2c8STejun Heo * condition. Mark hint. 433955a8e2c8STejun Heo */ 434055a8e2c8STejun Heo qc->err_mask |= AC_ERR_HSM | 434155a8e2c8STejun Heo AC_ERR_NODEV_HINT; 4342c6fd2807SJeff Garzik 4343c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_ERR; 4344c6fd2807SJeff Garzik goto fsm_start; 4345c6fd2807SJeff Garzik } 4346c6fd2807SJeff Garzik 4347c6fd2807SJeff Garzik /* For PIO reads, some devices may ask for 4348c6fd2807SJeff Garzik * data transfer (DRQ=1) alone with ERR=1. 4349c6fd2807SJeff Garzik * We respect DRQ here and transfer one 4350c6fd2807SJeff Garzik * block of junk data before changing the 4351c6fd2807SJeff Garzik * hsm_task_state to HSM_ST_ERR. 4352c6fd2807SJeff Garzik * 4353c6fd2807SJeff Garzik * For PIO writes, ERR=1 DRQ=1 doesn't make 4354c6fd2807SJeff Garzik * sense since the data block has been 4355c6fd2807SJeff Garzik * transferred to the device. 4356c6fd2807SJeff Garzik */ 4357c6fd2807SJeff Garzik if (unlikely(status & (ATA_ERR | ATA_DF))) { 4358c6fd2807SJeff Garzik /* data might be corrputed */ 4359c6fd2807SJeff Garzik qc->err_mask |= AC_ERR_DEV; 4360c6fd2807SJeff Garzik 4361c6fd2807SJeff Garzik if (!(qc->tf.flags & ATA_TFLAG_WRITE)) { 4362c6fd2807SJeff Garzik ata_pio_sectors(qc); 4363c6fd2807SJeff Garzik ata_altstatus(ap); 4364c6fd2807SJeff Garzik status = ata_wait_idle(ap); 4365c6fd2807SJeff Garzik } 4366c6fd2807SJeff Garzik 4367c6fd2807SJeff Garzik if (status & (ATA_BUSY | ATA_DRQ)) 4368c6fd2807SJeff Garzik qc->err_mask |= AC_ERR_HSM; 4369c6fd2807SJeff Garzik 4370c6fd2807SJeff Garzik /* ata_pio_sectors() might change the 4371c6fd2807SJeff Garzik * state to HSM_ST_LAST. so, the state 4372c6fd2807SJeff Garzik * is changed after ata_pio_sectors(). 4373c6fd2807SJeff Garzik */ 4374c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_ERR; 4375c6fd2807SJeff Garzik goto fsm_start; 4376c6fd2807SJeff Garzik } 4377c6fd2807SJeff Garzik 4378c6fd2807SJeff Garzik ata_pio_sectors(qc); 4379c6fd2807SJeff Garzik 4380c6fd2807SJeff Garzik if (ap->hsm_task_state == HSM_ST_LAST && 4381c6fd2807SJeff Garzik (!(qc->tf.flags & ATA_TFLAG_WRITE))) { 4382c6fd2807SJeff Garzik /* all data read */ 4383c6fd2807SJeff Garzik ata_altstatus(ap); 4384c6fd2807SJeff Garzik status = ata_wait_idle(ap); 4385c6fd2807SJeff Garzik goto fsm_start; 4386c6fd2807SJeff Garzik } 4387c6fd2807SJeff Garzik } 4388c6fd2807SJeff Garzik 4389c6fd2807SJeff Garzik ata_altstatus(ap); /* flush */ 4390c6fd2807SJeff Garzik poll_next = 1; 4391c6fd2807SJeff Garzik break; 4392c6fd2807SJeff Garzik 4393c6fd2807SJeff Garzik case HSM_ST_LAST: 4394c6fd2807SJeff Garzik if (unlikely(!ata_ok(status))) { 4395c6fd2807SJeff Garzik qc->err_mask |= __ac_err_mask(status); 4396c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_ERR; 4397c6fd2807SJeff Garzik goto fsm_start; 4398c6fd2807SJeff Garzik } 4399c6fd2807SJeff Garzik 4400c6fd2807SJeff Garzik /* no more data to transfer */ 4401c6fd2807SJeff Garzik DPRINTK("ata%u: dev %u command complete, drv_stat 0x%x\n", 4402c6fd2807SJeff Garzik ap->id, qc->dev->devno, status); 4403c6fd2807SJeff Garzik 4404c6fd2807SJeff Garzik WARN_ON(qc->err_mask); 4405c6fd2807SJeff Garzik 4406c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_IDLE; 4407c6fd2807SJeff Garzik 4408c6fd2807SJeff Garzik /* complete taskfile transaction */ 4409c6fd2807SJeff Garzik ata_hsm_qc_complete(qc, in_wq); 4410c6fd2807SJeff Garzik 4411c6fd2807SJeff Garzik poll_next = 0; 4412c6fd2807SJeff Garzik break; 4413c6fd2807SJeff Garzik 4414c6fd2807SJeff Garzik case HSM_ST_ERR: 4415c6fd2807SJeff Garzik /* make sure qc->err_mask is available to 4416c6fd2807SJeff Garzik * know what's wrong and recover 4417c6fd2807SJeff Garzik */ 4418c6fd2807SJeff Garzik WARN_ON(qc->err_mask == 0); 4419c6fd2807SJeff Garzik 4420c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_IDLE; 4421c6fd2807SJeff Garzik 4422c6fd2807SJeff Garzik /* complete taskfile transaction */ 4423c6fd2807SJeff Garzik ata_hsm_qc_complete(qc, in_wq); 4424c6fd2807SJeff Garzik 4425c6fd2807SJeff Garzik poll_next = 0; 4426c6fd2807SJeff Garzik break; 4427c6fd2807SJeff Garzik default: 4428c6fd2807SJeff Garzik poll_next = 0; 4429c6fd2807SJeff Garzik BUG(); 4430c6fd2807SJeff Garzik } 4431c6fd2807SJeff Garzik 4432c6fd2807SJeff Garzik return poll_next; 4433c6fd2807SJeff Garzik } 4434c6fd2807SJeff Garzik 443565f27f38SDavid Howells static void ata_pio_task(struct work_struct *work) 4436c6fd2807SJeff Garzik { 443765f27f38SDavid Howells struct ata_port *ap = 443865f27f38SDavid Howells container_of(work, struct ata_port, port_task.work); 443965f27f38SDavid Howells struct ata_queued_cmd *qc = ap->port_task_data; 4440c6fd2807SJeff Garzik u8 status; 4441c6fd2807SJeff Garzik int poll_next; 4442c6fd2807SJeff Garzik 4443c6fd2807SJeff Garzik fsm_start: 4444c6fd2807SJeff Garzik WARN_ON(ap->hsm_task_state == HSM_ST_IDLE); 4445c6fd2807SJeff Garzik 4446c6fd2807SJeff Garzik /* 4447c6fd2807SJeff Garzik * This is purely heuristic. This is a fast path. 4448c6fd2807SJeff Garzik * Sometimes when we enter, BSY will be cleared in 4449c6fd2807SJeff Garzik * a chk-status or two. If not, the drive is probably seeking 4450c6fd2807SJeff Garzik * or something. Snooze for a couple msecs, then 4451c6fd2807SJeff Garzik * chk-status again. If still busy, queue delayed work. 4452c6fd2807SJeff Garzik */ 4453c6fd2807SJeff Garzik status = ata_busy_wait(ap, ATA_BUSY, 5); 4454c6fd2807SJeff Garzik if (status & ATA_BUSY) { 4455c6fd2807SJeff Garzik msleep(2); 4456c6fd2807SJeff Garzik status = ata_busy_wait(ap, ATA_BUSY, 10); 4457c6fd2807SJeff Garzik if (status & ATA_BUSY) { 4458c6fd2807SJeff Garzik ata_port_queue_task(ap, ata_pio_task, qc, ATA_SHORT_PAUSE); 4459c6fd2807SJeff Garzik return; 4460c6fd2807SJeff Garzik } 4461c6fd2807SJeff Garzik } 4462c6fd2807SJeff Garzik 4463c6fd2807SJeff Garzik /* move the HSM */ 4464c6fd2807SJeff Garzik poll_next = ata_hsm_move(ap, qc, status, 1); 4465c6fd2807SJeff Garzik 4466c6fd2807SJeff Garzik /* another command or interrupt handler 4467c6fd2807SJeff Garzik * may be running at this point. 4468c6fd2807SJeff Garzik */ 4469c6fd2807SJeff Garzik if (poll_next) 4470c6fd2807SJeff Garzik goto fsm_start; 4471c6fd2807SJeff Garzik } 4472c6fd2807SJeff Garzik 4473c6fd2807SJeff Garzik /** 4474c6fd2807SJeff Garzik * ata_qc_new - Request an available ATA command, for queueing 4475c6fd2807SJeff Garzik * @ap: Port associated with device @dev 4476c6fd2807SJeff Garzik * @dev: Device from whom we request an available command structure 4477c6fd2807SJeff Garzik * 4478c6fd2807SJeff Garzik * LOCKING: 4479c6fd2807SJeff Garzik * None. 4480c6fd2807SJeff Garzik */ 4481c6fd2807SJeff Garzik 4482c6fd2807SJeff Garzik static struct ata_queued_cmd *ata_qc_new(struct ata_port *ap) 4483c6fd2807SJeff Garzik { 4484c6fd2807SJeff Garzik struct ata_queued_cmd *qc = NULL; 4485c6fd2807SJeff Garzik unsigned int i; 4486c6fd2807SJeff Garzik 4487c6fd2807SJeff Garzik /* no command while frozen */ 4488c6fd2807SJeff Garzik if (unlikely(ap->pflags & ATA_PFLAG_FROZEN)) 4489c6fd2807SJeff Garzik return NULL; 4490c6fd2807SJeff Garzik 4491c6fd2807SJeff Garzik /* the last tag is reserved for internal command. */ 4492c6fd2807SJeff Garzik for (i = 0; i < ATA_MAX_QUEUE - 1; i++) 4493c6fd2807SJeff Garzik if (!test_and_set_bit(i, &ap->qc_allocated)) { 4494c6fd2807SJeff Garzik qc = __ata_qc_from_tag(ap, i); 4495c6fd2807SJeff Garzik break; 4496c6fd2807SJeff Garzik } 4497c6fd2807SJeff Garzik 4498c6fd2807SJeff Garzik if (qc) 4499c6fd2807SJeff Garzik qc->tag = i; 4500c6fd2807SJeff Garzik 4501c6fd2807SJeff Garzik return qc; 4502c6fd2807SJeff Garzik } 4503c6fd2807SJeff Garzik 4504c6fd2807SJeff Garzik /** 4505c6fd2807SJeff Garzik * ata_qc_new_init - Request an available ATA command, and initialize it 4506c6fd2807SJeff Garzik * @dev: Device from whom we request an available command structure 4507c6fd2807SJeff Garzik * 4508c6fd2807SJeff Garzik * LOCKING: 4509c6fd2807SJeff Garzik * None. 4510c6fd2807SJeff Garzik */ 4511c6fd2807SJeff Garzik 4512c6fd2807SJeff Garzik struct ata_queued_cmd *ata_qc_new_init(struct ata_device *dev) 4513c6fd2807SJeff Garzik { 4514c6fd2807SJeff Garzik struct ata_port *ap = dev->ap; 4515c6fd2807SJeff Garzik struct ata_queued_cmd *qc; 4516c6fd2807SJeff Garzik 4517c6fd2807SJeff Garzik qc = ata_qc_new(ap); 4518c6fd2807SJeff Garzik if (qc) { 4519c6fd2807SJeff Garzik qc->scsicmd = NULL; 4520c6fd2807SJeff Garzik qc->ap = ap; 4521c6fd2807SJeff Garzik qc->dev = dev; 4522c6fd2807SJeff Garzik 4523c6fd2807SJeff Garzik ata_qc_reinit(qc); 4524c6fd2807SJeff Garzik } 4525c6fd2807SJeff Garzik 4526c6fd2807SJeff Garzik return qc; 4527c6fd2807SJeff Garzik } 4528c6fd2807SJeff Garzik 4529c6fd2807SJeff Garzik /** 4530c6fd2807SJeff Garzik * ata_qc_free - free unused ata_queued_cmd 4531c6fd2807SJeff Garzik * @qc: Command to complete 4532c6fd2807SJeff Garzik * 4533c6fd2807SJeff Garzik * Designed to free unused ata_queued_cmd object 4534c6fd2807SJeff Garzik * in case something prevents using it. 4535c6fd2807SJeff Garzik * 4536c6fd2807SJeff Garzik * LOCKING: 4537cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 4538c6fd2807SJeff Garzik */ 4539c6fd2807SJeff Garzik void ata_qc_free(struct ata_queued_cmd *qc) 4540c6fd2807SJeff Garzik { 4541c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 4542c6fd2807SJeff Garzik unsigned int tag; 4543c6fd2807SJeff Garzik 4544c6fd2807SJeff Garzik WARN_ON(qc == NULL); /* ata_qc_from_tag _might_ return NULL */ 4545c6fd2807SJeff Garzik 4546c6fd2807SJeff Garzik qc->flags = 0; 4547c6fd2807SJeff Garzik tag = qc->tag; 4548c6fd2807SJeff Garzik if (likely(ata_tag_valid(tag))) { 4549c6fd2807SJeff Garzik qc->tag = ATA_TAG_POISON; 4550c6fd2807SJeff Garzik clear_bit(tag, &ap->qc_allocated); 4551c6fd2807SJeff Garzik } 4552c6fd2807SJeff Garzik } 4553c6fd2807SJeff Garzik 4554c6fd2807SJeff Garzik void __ata_qc_complete(struct ata_queued_cmd *qc) 4555c6fd2807SJeff Garzik { 4556c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 4557c6fd2807SJeff Garzik 4558c6fd2807SJeff Garzik WARN_ON(qc == NULL); /* ata_qc_from_tag _might_ return NULL */ 4559c6fd2807SJeff Garzik WARN_ON(!(qc->flags & ATA_QCFLAG_ACTIVE)); 4560c6fd2807SJeff Garzik 4561c6fd2807SJeff Garzik if (likely(qc->flags & ATA_QCFLAG_DMAMAP)) 4562c6fd2807SJeff Garzik ata_sg_clean(qc); 4563c6fd2807SJeff Garzik 4564c6fd2807SJeff Garzik /* command should be marked inactive atomically with qc completion */ 4565c6fd2807SJeff Garzik if (qc->tf.protocol == ATA_PROT_NCQ) 4566c6fd2807SJeff Garzik ap->sactive &= ~(1 << qc->tag); 4567c6fd2807SJeff Garzik else 4568c6fd2807SJeff Garzik ap->active_tag = ATA_TAG_POISON; 4569c6fd2807SJeff Garzik 4570c6fd2807SJeff Garzik /* atapi: mark qc as inactive to prevent the interrupt handler 4571c6fd2807SJeff Garzik * from completing the command twice later, before the error handler 4572c6fd2807SJeff Garzik * is called. (when rc != 0 and atapi request sense is needed) 4573c6fd2807SJeff Garzik */ 4574c6fd2807SJeff Garzik qc->flags &= ~ATA_QCFLAG_ACTIVE; 4575c6fd2807SJeff Garzik ap->qc_active &= ~(1 << qc->tag); 4576c6fd2807SJeff Garzik 4577c6fd2807SJeff Garzik /* call completion callback */ 4578c6fd2807SJeff Garzik qc->complete_fn(qc); 4579c6fd2807SJeff Garzik } 4580c6fd2807SJeff Garzik 458139599a53STejun Heo static void fill_result_tf(struct ata_queued_cmd *qc) 458239599a53STejun Heo { 458339599a53STejun Heo struct ata_port *ap = qc->ap; 458439599a53STejun Heo 458539599a53STejun Heo ap->ops->tf_read(ap, &qc->result_tf); 458639599a53STejun Heo qc->result_tf.flags = qc->tf.flags; 458739599a53STejun Heo } 458839599a53STejun Heo 4589c6fd2807SJeff Garzik /** 4590c6fd2807SJeff Garzik * ata_qc_complete - Complete an active ATA command 4591c6fd2807SJeff Garzik * @qc: Command to complete 4592c6fd2807SJeff Garzik * @err_mask: ATA Status register contents 4593c6fd2807SJeff Garzik * 4594c6fd2807SJeff Garzik * Indicate to the mid and upper layers that an ATA 4595c6fd2807SJeff Garzik * command has completed, with either an ok or not-ok status. 4596c6fd2807SJeff Garzik * 4597c6fd2807SJeff Garzik * LOCKING: 4598cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 4599c6fd2807SJeff Garzik */ 4600c6fd2807SJeff Garzik void ata_qc_complete(struct ata_queued_cmd *qc) 4601c6fd2807SJeff Garzik { 4602c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 4603c6fd2807SJeff Garzik 4604c6fd2807SJeff Garzik /* XXX: New EH and old EH use different mechanisms to 4605c6fd2807SJeff Garzik * synchronize EH with regular execution path. 4606c6fd2807SJeff Garzik * 4607c6fd2807SJeff Garzik * In new EH, a failed qc is marked with ATA_QCFLAG_FAILED. 4608c6fd2807SJeff Garzik * Normal execution path is responsible for not accessing a 4609c6fd2807SJeff Garzik * failed qc. libata core enforces the rule by returning NULL 4610c6fd2807SJeff Garzik * from ata_qc_from_tag() for failed qcs. 4611c6fd2807SJeff Garzik * 4612c6fd2807SJeff Garzik * Old EH depends on ata_qc_complete() nullifying completion 4613c6fd2807SJeff Garzik * requests if ATA_QCFLAG_EH_SCHEDULED is set. Old EH does 4614c6fd2807SJeff Garzik * not synchronize with interrupt handler. Only PIO task is 4615c6fd2807SJeff Garzik * taken care of. 4616c6fd2807SJeff Garzik */ 4617c6fd2807SJeff Garzik if (ap->ops->error_handler) { 4618c6fd2807SJeff Garzik WARN_ON(ap->pflags & ATA_PFLAG_FROZEN); 4619c6fd2807SJeff Garzik 4620c6fd2807SJeff Garzik if (unlikely(qc->err_mask)) 4621c6fd2807SJeff Garzik qc->flags |= ATA_QCFLAG_FAILED; 4622c6fd2807SJeff Garzik 4623c6fd2807SJeff Garzik if (unlikely(qc->flags & ATA_QCFLAG_FAILED)) { 4624c6fd2807SJeff Garzik if (!ata_tag_internal(qc->tag)) { 4625c6fd2807SJeff Garzik /* always fill result TF for failed qc */ 462639599a53STejun Heo fill_result_tf(qc); 4627c6fd2807SJeff Garzik ata_qc_schedule_eh(qc); 4628c6fd2807SJeff Garzik return; 4629c6fd2807SJeff Garzik } 4630c6fd2807SJeff Garzik } 4631c6fd2807SJeff Garzik 4632c6fd2807SJeff Garzik /* read result TF if requested */ 4633c6fd2807SJeff Garzik if (qc->flags & ATA_QCFLAG_RESULT_TF) 463439599a53STejun Heo fill_result_tf(qc); 4635c6fd2807SJeff Garzik 4636c6fd2807SJeff Garzik __ata_qc_complete(qc); 4637c6fd2807SJeff Garzik } else { 4638c6fd2807SJeff Garzik if (qc->flags & ATA_QCFLAG_EH_SCHEDULED) 4639c6fd2807SJeff Garzik return; 4640c6fd2807SJeff Garzik 4641c6fd2807SJeff Garzik /* read result TF if failed or requested */ 4642c6fd2807SJeff Garzik if (qc->err_mask || qc->flags & ATA_QCFLAG_RESULT_TF) 464339599a53STejun Heo fill_result_tf(qc); 4644c6fd2807SJeff Garzik 4645c6fd2807SJeff Garzik __ata_qc_complete(qc); 4646c6fd2807SJeff Garzik } 4647c6fd2807SJeff Garzik } 4648c6fd2807SJeff Garzik 4649c6fd2807SJeff Garzik /** 4650c6fd2807SJeff Garzik * ata_qc_complete_multiple - Complete multiple qcs successfully 4651c6fd2807SJeff Garzik * @ap: port in question 4652c6fd2807SJeff Garzik * @qc_active: new qc_active mask 4653c6fd2807SJeff Garzik * @finish_qc: LLDD callback invoked before completing a qc 4654c6fd2807SJeff Garzik * 4655c6fd2807SJeff Garzik * Complete in-flight commands. This functions is meant to be 4656c6fd2807SJeff Garzik * called from low-level driver's interrupt routine to complete 4657c6fd2807SJeff Garzik * requests normally. ap->qc_active and @qc_active is compared 4658c6fd2807SJeff Garzik * and commands are completed accordingly. 4659c6fd2807SJeff Garzik * 4660c6fd2807SJeff Garzik * LOCKING: 4661cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 4662c6fd2807SJeff Garzik * 4663c6fd2807SJeff Garzik * RETURNS: 4664c6fd2807SJeff Garzik * Number of completed commands on success, -errno otherwise. 4665c6fd2807SJeff Garzik */ 4666c6fd2807SJeff Garzik int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active, 4667c6fd2807SJeff Garzik void (*finish_qc)(struct ata_queued_cmd *)) 4668c6fd2807SJeff Garzik { 4669c6fd2807SJeff Garzik int nr_done = 0; 4670c6fd2807SJeff Garzik u32 done_mask; 4671c6fd2807SJeff Garzik int i; 4672c6fd2807SJeff Garzik 4673c6fd2807SJeff Garzik done_mask = ap->qc_active ^ qc_active; 4674c6fd2807SJeff Garzik 4675c6fd2807SJeff Garzik if (unlikely(done_mask & qc_active)) { 4676c6fd2807SJeff Garzik ata_port_printk(ap, KERN_ERR, "illegal qc_active transition " 4677c6fd2807SJeff Garzik "(%08x->%08x)\n", ap->qc_active, qc_active); 4678c6fd2807SJeff Garzik return -EINVAL; 4679c6fd2807SJeff Garzik } 4680c6fd2807SJeff Garzik 4681c6fd2807SJeff Garzik for (i = 0; i < ATA_MAX_QUEUE; i++) { 4682c6fd2807SJeff Garzik struct ata_queued_cmd *qc; 4683c6fd2807SJeff Garzik 4684c6fd2807SJeff Garzik if (!(done_mask & (1 << i))) 4685c6fd2807SJeff Garzik continue; 4686c6fd2807SJeff Garzik 4687c6fd2807SJeff Garzik if ((qc = ata_qc_from_tag(ap, i))) { 4688c6fd2807SJeff Garzik if (finish_qc) 4689c6fd2807SJeff Garzik finish_qc(qc); 4690c6fd2807SJeff Garzik ata_qc_complete(qc); 4691c6fd2807SJeff Garzik nr_done++; 4692c6fd2807SJeff Garzik } 4693c6fd2807SJeff Garzik } 4694c6fd2807SJeff Garzik 4695c6fd2807SJeff Garzik return nr_done; 4696c6fd2807SJeff Garzik } 4697c6fd2807SJeff Garzik 4698c6fd2807SJeff Garzik static inline int ata_should_dma_map(struct ata_queued_cmd *qc) 4699c6fd2807SJeff Garzik { 4700c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 4701c6fd2807SJeff Garzik 4702c6fd2807SJeff Garzik switch (qc->tf.protocol) { 4703c6fd2807SJeff Garzik case ATA_PROT_NCQ: 4704c6fd2807SJeff Garzik case ATA_PROT_DMA: 4705c6fd2807SJeff Garzik case ATA_PROT_ATAPI_DMA: 4706c6fd2807SJeff Garzik return 1; 4707c6fd2807SJeff Garzik 4708c6fd2807SJeff Garzik case ATA_PROT_ATAPI: 4709c6fd2807SJeff Garzik case ATA_PROT_PIO: 4710c6fd2807SJeff Garzik if (ap->flags & ATA_FLAG_PIO_DMA) 4711c6fd2807SJeff Garzik return 1; 4712c6fd2807SJeff Garzik 4713c6fd2807SJeff Garzik /* fall through */ 4714c6fd2807SJeff Garzik 4715c6fd2807SJeff Garzik default: 4716c6fd2807SJeff Garzik return 0; 4717c6fd2807SJeff Garzik } 4718c6fd2807SJeff Garzik 4719c6fd2807SJeff Garzik /* never reached */ 4720c6fd2807SJeff Garzik } 4721c6fd2807SJeff Garzik 4722c6fd2807SJeff Garzik /** 4723c6fd2807SJeff Garzik * ata_qc_issue - issue taskfile to device 4724c6fd2807SJeff Garzik * @qc: command to issue to device 4725c6fd2807SJeff Garzik * 4726c6fd2807SJeff Garzik * Prepare an ATA command to submission to device. 4727c6fd2807SJeff Garzik * This includes mapping the data into a DMA-able 4728c6fd2807SJeff Garzik * area, filling in the S/G table, and finally 4729c6fd2807SJeff Garzik * writing the taskfile to hardware, starting the command. 4730c6fd2807SJeff Garzik * 4731c6fd2807SJeff Garzik * LOCKING: 4732cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 4733c6fd2807SJeff Garzik */ 4734c6fd2807SJeff Garzik void ata_qc_issue(struct ata_queued_cmd *qc) 4735c6fd2807SJeff Garzik { 4736c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 4737c6fd2807SJeff Garzik 4738c6fd2807SJeff Garzik /* Make sure only one non-NCQ command is outstanding. The 4739c6fd2807SJeff Garzik * check is skipped for old EH because it reuses active qc to 4740c6fd2807SJeff Garzik * request ATAPI sense. 4741c6fd2807SJeff Garzik */ 4742c6fd2807SJeff Garzik WARN_ON(ap->ops->error_handler && ata_tag_valid(ap->active_tag)); 4743c6fd2807SJeff Garzik 4744c6fd2807SJeff Garzik if (qc->tf.protocol == ATA_PROT_NCQ) { 4745c6fd2807SJeff Garzik WARN_ON(ap->sactive & (1 << qc->tag)); 4746c6fd2807SJeff Garzik ap->sactive |= 1 << qc->tag; 4747c6fd2807SJeff Garzik } else { 4748c6fd2807SJeff Garzik WARN_ON(ap->sactive); 4749c6fd2807SJeff Garzik ap->active_tag = qc->tag; 4750c6fd2807SJeff Garzik } 4751c6fd2807SJeff Garzik 4752c6fd2807SJeff Garzik qc->flags |= ATA_QCFLAG_ACTIVE; 4753c6fd2807SJeff Garzik ap->qc_active |= 1 << qc->tag; 4754c6fd2807SJeff Garzik 4755c6fd2807SJeff Garzik if (ata_should_dma_map(qc)) { 4756c6fd2807SJeff Garzik if (qc->flags & ATA_QCFLAG_SG) { 4757c6fd2807SJeff Garzik if (ata_sg_setup(qc)) 4758c6fd2807SJeff Garzik goto sg_err; 4759c6fd2807SJeff Garzik } else if (qc->flags & ATA_QCFLAG_SINGLE) { 4760c6fd2807SJeff Garzik if (ata_sg_setup_one(qc)) 4761c6fd2807SJeff Garzik goto sg_err; 4762c6fd2807SJeff Garzik } 4763c6fd2807SJeff Garzik } else { 4764c6fd2807SJeff Garzik qc->flags &= ~ATA_QCFLAG_DMAMAP; 4765c6fd2807SJeff Garzik } 4766c6fd2807SJeff Garzik 4767c6fd2807SJeff Garzik ap->ops->qc_prep(qc); 4768c6fd2807SJeff Garzik 4769c6fd2807SJeff Garzik qc->err_mask |= ap->ops->qc_issue(qc); 4770c6fd2807SJeff Garzik if (unlikely(qc->err_mask)) 4771c6fd2807SJeff Garzik goto err; 4772c6fd2807SJeff Garzik return; 4773c6fd2807SJeff Garzik 4774c6fd2807SJeff Garzik sg_err: 4775c6fd2807SJeff Garzik qc->flags &= ~ATA_QCFLAG_DMAMAP; 4776c6fd2807SJeff Garzik qc->err_mask |= AC_ERR_SYSTEM; 4777c6fd2807SJeff Garzik err: 4778c6fd2807SJeff Garzik ata_qc_complete(qc); 4779c6fd2807SJeff Garzik } 4780c6fd2807SJeff Garzik 4781c6fd2807SJeff Garzik /** 4782c6fd2807SJeff Garzik * ata_qc_issue_prot - issue taskfile to device in proto-dependent manner 4783c6fd2807SJeff Garzik * @qc: command to issue to device 4784c6fd2807SJeff Garzik * 4785c6fd2807SJeff Garzik * Using various libata functions and hooks, this function 4786c6fd2807SJeff Garzik * starts an ATA command. ATA commands are grouped into 4787c6fd2807SJeff Garzik * classes called "protocols", and issuing each type of protocol 4788c6fd2807SJeff Garzik * is slightly different. 4789c6fd2807SJeff Garzik * 4790c6fd2807SJeff Garzik * May be used as the qc_issue() entry in ata_port_operations. 4791c6fd2807SJeff Garzik * 4792c6fd2807SJeff Garzik * LOCKING: 4793cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 4794c6fd2807SJeff Garzik * 4795c6fd2807SJeff Garzik * RETURNS: 4796c6fd2807SJeff Garzik * Zero on success, AC_ERR_* mask on failure 4797c6fd2807SJeff Garzik */ 4798c6fd2807SJeff Garzik 4799c6fd2807SJeff Garzik unsigned int ata_qc_issue_prot(struct ata_queued_cmd *qc) 4800c6fd2807SJeff Garzik { 4801c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 4802c6fd2807SJeff Garzik 4803c6fd2807SJeff Garzik /* Use polling pio if the LLD doesn't handle 4804c6fd2807SJeff Garzik * interrupt driven pio and atapi CDB interrupt. 4805c6fd2807SJeff Garzik */ 4806c6fd2807SJeff Garzik if (ap->flags & ATA_FLAG_PIO_POLLING) { 4807c6fd2807SJeff Garzik switch (qc->tf.protocol) { 4808c6fd2807SJeff Garzik case ATA_PROT_PIO: 4809e3472cbeSAlbert Lee case ATA_PROT_NODATA: 4810c6fd2807SJeff Garzik case ATA_PROT_ATAPI: 4811c6fd2807SJeff Garzik case ATA_PROT_ATAPI_NODATA: 4812c6fd2807SJeff Garzik qc->tf.flags |= ATA_TFLAG_POLLING; 4813c6fd2807SJeff Garzik break; 4814c6fd2807SJeff Garzik case ATA_PROT_ATAPI_DMA: 4815c6fd2807SJeff Garzik if (qc->dev->flags & ATA_DFLAG_CDB_INTR) 4816c6fd2807SJeff Garzik /* see ata_dma_blacklisted() */ 4817c6fd2807SJeff Garzik BUG(); 4818c6fd2807SJeff Garzik break; 4819c6fd2807SJeff Garzik default: 4820c6fd2807SJeff Garzik break; 4821c6fd2807SJeff Garzik } 4822c6fd2807SJeff Garzik } 4823c6fd2807SJeff Garzik 48243d3cca37STejun Heo /* Some controllers show flaky interrupt behavior after 48253d3cca37STejun Heo * setting xfer mode. Use polling instead. 48263d3cca37STejun Heo */ 48273d3cca37STejun Heo if (unlikely(qc->tf.command == ATA_CMD_SET_FEATURES && 48283d3cca37STejun Heo qc->tf.feature == SETFEATURES_XFER) && 48293d3cca37STejun Heo (ap->flags & ATA_FLAG_SETXFER_POLLING)) 48303d3cca37STejun Heo qc->tf.flags |= ATA_TFLAG_POLLING; 48313d3cca37STejun Heo 4832c6fd2807SJeff Garzik /* select the device */ 4833c6fd2807SJeff Garzik ata_dev_select(ap, qc->dev->devno, 1, 0); 4834c6fd2807SJeff Garzik 4835c6fd2807SJeff Garzik /* start the command */ 4836c6fd2807SJeff Garzik switch (qc->tf.protocol) { 4837c6fd2807SJeff Garzik case ATA_PROT_NODATA: 4838c6fd2807SJeff Garzik if (qc->tf.flags & ATA_TFLAG_POLLING) 4839c6fd2807SJeff Garzik ata_qc_set_polling(qc); 4840c6fd2807SJeff Garzik 4841c6fd2807SJeff Garzik ata_tf_to_host(ap, &qc->tf); 4842c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_LAST; 4843c6fd2807SJeff Garzik 4844c6fd2807SJeff Garzik if (qc->tf.flags & ATA_TFLAG_POLLING) 4845c6fd2807SJeff Garzik ata_port_queue_task(ap, ata_pio_task, qc, 0); 4846c6fd2807SJeff Garzik 4847c6fd2807SJeff Garzik break; 4848c6fd2807SJeff Garzik 4849c6fd2807SJeff Garzik case ATA_PROT_DMA: 4850c6fd2807SJeff Garzik WARN_ON(qc->tf.flags & ATA_TFLAG_POLLING); 4851c6fd2807SJeff Garzik 4852c6fd2807SJeff Garzik ap->ops->tf_load(ap, &qc->tf); /* load tf registers */ 4853c6fd2807SJeff Garzik ap->ops->bmdma_setup(qc); /* set up bmdma */ 4854c6fd2807SJeff Garzik ap->ops->bmdma_start(qc); /* initiate bmdma */ 4855c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_LAST; 4856c6fd2807SJeff Garzik break; 4857c6fd2807SJeff Garzik 4858c6fd2807SJeff Garzik case ATA_PROT_PIO: 4859c6fd2807SJeff Garzik if (qc->tf.flags & ATA_TFLAG_POLLING) 4860c6fd2807SJeff Garzik ata_qc_set_polling(qc); 4861c6fd2807SJeff Garzik 4862c6fd2807SJeff Garzik ata_tf_to_host(ap, &qc->tf); 4863c6fd2807SJeff Garzik 4864c6fd2807SJeff Garzik if (qc->tf.flags & ATA_TFLAG_WRITE) { 4865c6fd2807SJeff Garzik /* PIO data out protocol */ 4866c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_FIRST; 4867c6fd2807SJeff Garzik ata_port_queue_task(ap, ata_pio_task, qc, 0); 4868c6fd2807SJeff Garzik 4869c6fd2807SJeff Garzik /* always send first data block using 4870c6fd2807SJeff Garzik * the ata_pio_task() codepath. 4871c6fd2807SJeff Garzik */ 4872c6fd2807SJeff Garzik } else { 4873c6fd2807SJeff Garzik /* PIO data in protocol */ 4874c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST; 4875c6fd2807SJeff Garzik 4876c6fd2807SJeff Garzik if (qc->tf.flags & ATA_TFLAG_POLLING) 4877c6fd2807SJeff Garzik ata_port_queue_task(ap, ata_pio_task, qc, 0); 4878c6fd2807SJeff Garzik 4879c6fd2807SJeff Garzik /* if polling, ata_pio_task() handles the rest. 4880c6fd2807SJeff Garzik * otherwise, interrupt handler takes over from here. 4881c6fd2807SJeff Garzik */ 4882c6fd2807SJeff Garzik } 4883c6fd2807SJeff Garzik 4884c6fd2807SJeff Garzik break; 4885c6fd2807SJeff Garzik 4886c6fd2807SJeff Garzik case ATA_PROT_ATAPI: 4887c6fd2807SJeff Garzik case ATA_PROT_ATAPI_NODATA: 4888c6fd2807SJeff Garzik if (qc->tf.flags & ATA_TFLAG_POLLING) 4889c6fd2807SJeff Garzik ata_qc_set_polling(qc); 4890c6fd2807SJeff Garzik 4891c6fd2807SJeff Garzik ata_tf_to_host(ap, &qc->tf); 4892c6fd2807SJeff Garzik 4893c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_FIRST; 4894c6fd2807SJeff Garzik 4895c6fd2807SJeff Garzik /* send cdb by polling if no cdb interrupt */ 4896c6fd2807SJeff Garzik if ((!(qc->dev->flags & ATA_DFLAG_CDB_INTR)) || 4897c6fd2807SJeff Garzik (qc->tf.flags & ATA_TFLAG_POLLING)) 4898c6fd2807SJeff Garzik ata_port_queue_task(ap, ata_pio_task, qc, 0); 4899c6fd2807SJeff Garzik break; 4900c6fd2807SJeff Garzik 4901c6fd2807SJeff Garzik case ATA_PROT_ATAPI_DMA: 4902c6fd2807SJeff Garzik WARN_ON(qc->tf.flags & ATA_TFLAG_POLLING); 4903c6fd2807SJeff Garzik 4904c6fd2807SJeff Garzik ap->ops->tf_load(ap, &qc->tf); /* load tf registers */ 4905c6fd2807SJeff Garzik ap->ops->bmdma_setup(qc); /* set up bmdma */ 4906c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_FIRST; 4907c6fd2807SJeff Garzik 4908c6fd2807SJeff Garzik /* send cdb by polling if no cdb interrupt */ 4909c6fd2807SJeff Garzik if (!(qc->dev->flags & ATA_DFLAG_CDB_INTR)) 4910c6fd2807SJeff Garzik ata_port_queue_task(ap, ata_pio_task, qc, 0); 4911c6fd2807SJeff Garzik break; 4912c6fd2807SJeff Garzik 4913c6fd2807SJeff Garzik default: 4914c6fd2807SJeff Garzik WARN_ON(1); 4915c6fd2807SJeff Garzik return AC_ERR_SYSTEM; 4916c6fd2807SJeff Garzik } 4917c6fd2807SJeff Garzik 4918c6fd2807SJeff Garzik return 0; 4919c6fd2807SJeff Garzik } 4920c6fd2807SJeff Garzik 4921c6fd2807SJeff Garzik /** 4922c6fd2807SJeff Garzik * ata_host_intr - Handle host interrupt for given (port, task) 4923c6fd2807SJeff Garzik * @ap: Port on which interrupt arrived (possibly...) 4924c6fd2807SJeff Garzik * @qc: Taskfile currently active in engine 4925c6fd2807SJeff Garzik * 4926c6fd2807SJeff Garzik * Handle host interrupt for given queued command. Currently, 4927c6fd2807SJeff Garzik * only DMA interrupts are handled. All other commands are 4928c6fd2807SJeff Garzik * handled via polling with interrupts disabled (nIEN bit). 4929c6fd2807SJeff Garzik * 4930c6fd2807SJeff Garzik * LOCKING: 4931cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 4932c6fd2807SJeff Garzik * 4933c6fd2807SJeff Garzik * RETURNS: 4934c6fd2807SJeff Garzik * One if interrupt was handled, zero if not (shared irq). 4935c6fd2807SJeff Garzik */ 4936c6fd2807SJeff Garzik 4937c6fd2807SJeff Garzik inline unsigned int ata_host_intr (struct ata_port *ap, 4938c6fd2807SJeff Garzik struct ata_queued_cmd *qc) 4939c6fd2807SJeff Garzik { 4940ea54763fSTejun Heo struct ata_eh_info *ehi = &ap->eh_info; 4941c6fd2807SJeff Garzik u8 status, host_stat = 0; 4942c6fd2807SJeff Garzik 4943c6fd2807SJeff Garzik VPRINTK("ata%u: protocol %d task_state %d\n", 4944c6fd2807SJeff Garzik ap->id, qc->tf.protocol, ap->hsm_task_state); 4945c6fd2807SJeff Garzik 4946c6fd2807SJeff Garzik /* Check whether we are expecting interrupt in this state */ 4947c6fd2807SJeff Garzik switch (ap->hsm_task_state) { 4948c6fd2807SJeff Garzik case HSM_ST_FIRST: 4949c6fd2807SJeff Garzik /* Some pre-ATAPI-4 devices assert INTRQ 4950c6fd2807SJeff Garzik * at this state when ready to receive CDB. 4951c6fd2807SJeff Garzik */ 4952c6fd2807SJeff Garzik 4953c6fd2807SJeff Garzik /* Check the ATA_DFLAG_CDB_INTR flag is enough here. 4954c6fd2807SJeff Garzik * The flag was turned on only for atapi devices. 4955c6fd2807SJeff Garzik * No need to check is_atapi_taskfile(&qc->tf) again. 4956c6fd2807SJeff Garzik */ 4957c6fd2807SJeff Garzik if (!(qc->dev->flags & ATA_DFLAG_CDB_INTR)) 4958c6fd2807SJeff Garzik goto idle_irq; 4959c6fd2807SJeff Garzik break; 4960c6fd2807SJeff Garzik case HSM_ST_LAST: 4961c6fd2807SJeff Garzik if (qc->tf.protocol == ATA_PROT_DMA || 4962c6fd2807SJeff Garzik qc->tf.protocol == ATA_PROT_ATAPI_DMA) { 4963c6fd2807SJeff Garzik /* check status of DMA engine */ 4964c6fd2807SJeff Garzik host_stat = ap->ops->bmdma_status(ap); 4965c6fd2807SJeff Garzik VPRINTK("ata%u: host_stat 0x%X\n", ap->id, host_stat); 4966c6fd2807SJeff Garzik 4967c6fd2807SJeff Garzik /* if it's not our irq... */ 4968c6fd2807SJeff Garzik if (!(host_stat & ATA_DMA_INTR)) 4969c6fd2807SJeff Garzik goto idle_irq; 4970c6fd2807SJeff Garzik 4971c6fd2807SJeff Garzik /* before we do anything else, clear DMA-Start bit */ 4972c6fd2807SJeff Garzik ap->ops->bmdma_stop(qc); 4973c6fd2807SJeff Garzik 4974c6fd2807SJeff Garzik if (unlikely(host_stat & ATA_DMA_ERR)) { 4975c6fd2807SJeff Garzik /* error when transfering data to/from memory */ 4976c6fd2807SJeff Garzik qc->err_mask |= AC_ERR_HOST_BUS; 4977c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_ERR; 4978c6fd2807SJeff Garzik } 4979c6fd2807SJeff Garzik } 4980c6fd2807SJeff Garzik break; 4981c6fd2807SJeff Garzik case HSM_ST: 4982c6fd2807SJeff Garzik break; 4983c6fd2807SJeff Garzik default: 4984c6fd2807SJeff Garzik goto idle_irq; 4985c6fd2807SJeff Garzik } 4986c6fd2807SJeff Garzik 4987c6fd2807SJeff Garzik /* check altstatus */ 4988c6fd2807SJeff Garzik status = ata_altstatus(ap); 4989c6fd2807SJeff Garzik if (status & ATA_BUSY) 4990c6fd2807SJeff Garzik goto idle_irq; 4991c6fd2807SJeff Garzik 4992c6fd2807SJeff Garzik /* check main status, clearing INTRQ */ 4993c6fd2807SJeff Garzik status = ata_chk_status(ap); 4994c6fd2807SJeff Garzik if (unlikely(status & ATA_BUSY)) 4995c6fd2807SJeff Garzik goto idle_irq; 4996c6fd2807SJeff Garzik 4997c6fd2807SJeff Garzik /* ack bmdma irq events */ 4998c6fd2807SJeff Garzik ap->ops->irq_clear(ap); 4999c6fd2807SJeff Garzik 5000c6fd2807SJeff Garzik ata_hsm_move(ap, qc, status, 0); 5001ea54763fSTejun Heo 5002ea54763fSTejun Heo if (unlikely(qc->err_mask) && (qc->tf.protocol == ATA_PROT_DMA || 5003ea54763fSTejun Heo qc->tf.protocol == ATA_PROT_ATAPI_DMA)) 5004ea54763fSTejun Heo ata_ehi_push_desc(ehi, "BMDMA stat 0x%x", host_stat); 5005ea54763fSTejun Heo 5006c6fd2807SJeff Garzik return 1; /* irq handled */ 5007c6fd2807SJeff Garzik 5008c6fd2807SJeff Garzik idle_irq: 5009c6fd2807SJeff Garzik ap->stats.idle_irq++; 5010c6fd2807SJeff Garzik 5011c6fd2807SJeff Garzik #ifdef ATA_IRQ_TRAP 5012c6fd2807SJeff Garzik if ((ap->stats.idle_irq % 1000) == 0) { 5013c6fd2807SJeff Garzik ata_irq_ack(ap, 0); /* debug trap */ 5014c6fd2807SJeff Garzik ata_port_printk(ap, KERN_WARNING, "irq trap\n"); 5015c6fd2807SJeff Garzik return 1; 5016c6fd2807SJeff Garzik } 5017c6fd2807SJeff Garzik #endif 5018c6fd2807SJeff Garzik return 0; /* irq not handled */ 5019c6fd2807SJeff Garzik } 5020c6fd2807SJeff Garzik 5021c6fd2807SJeff Garzik /** 5022c6fd2807SJeff Garzik * ata_interrupt - Default ATA host interrupt handler 5023c6fd2807SJeff Garzik * @irq: irq line (unused) 5024cca3974eSJeff Garzik * @dev_instance: pointer to our ata_host information structure 5025c6fd2807SJeff Garzik * 5026c6fd2807SJeff Garzik * Default interrupt handler for PCI IDE devices. Calls 5027c6fd2807SJeff Garzik * ata_host_intr() for each port that is not disabled. 5028c6fd2807SJeff Garzik * 5029c6fd2807SJeff Garzik * LOCKING: 5030cca3974eSJeff Garzik * Obtains host lock during operation. 5031c6fd2807SJeff Garzik * 5032c6fd2807SJeff Garzik * RETURNS: 5033c6fd2807SJeff Garzik * IRQ_NONE or IRQ_HANDLED. 5034c6fd2807SJeff Garzik */ 5035c6fd2807SJeff Garzik 50367d12e780SDavid Howells irqreturn_t ata_interrupt (int irq, void *dev_instance) 5037c6fd2807SJeff Garzik { 5038cca3974eSJeff Garzik struct ata_host *host = dev_instance; 5039c6fd2807SJeff Garzik unsigned int i; 5040c6fd2807SJeff Garzik unsigned int handled = 0; 5041c6fd2807SJeff Garzik unsigned long flags; 5042c6fd2807SJeff Garzik 5043c6fd2807SJeff Garzik /* TODO: make _irqsave conditional on x86 PCI IDE legacy mode */ 5044cca3974eSJeff Garzik spin_lock_irqsave(&host->lock, flags); 5045c6fd2807SJeff Garzik 5046cca3974eSJeff Garzik for (i = 0; i < host->n_ports; i++) { 5047c6fd2807SJeff Garzik struct ata_port *ap; 5048c6fd2807SJeff Garzik 5049cca3974eSJeff Garzik ap = host->ports[i]; 5050c6fd2807SJeff Garzik if (ap && 5051c6fd2807SJeff Garzik !(ap->flags & ATA_FLAG_DISABLED)) { 5052c6fd2807SJeff Garzik struct ata_queued_cmd *qc; 5053c6fd2807SJeff Garzik 5054c6fd2807SJeff Garzik qc = ata_qc_from_tag(ap, ap->active_tag); 5055c6fd2807SJeff Garzik if (qc && (!(qc->tf.flags & ATA_TFLAG_POLLING)) && 5056c6fd2807SJeff Garzik (qc->flags & ATA_QCFLAG_ACTIVE)) 5057c6fd2807SJeff Garzik handled |= ata_host_intr(ap, qc); 5058c6fd2807SJeff Garzik } 5059c6fd2807SJeff Garzik } 5060c6fd2807SJeff Garzik 5061cca3974eSJeff Garzik spin_unlock_irqrestore(&host->lock, flags); 5062c6fd2807SJeff Garzik 5063c6fd2807SJeff Garzik return IRQ_RETVAL(handled); 5064c6fd2807SJeff Garzik } 5065c6fd2807SJeff Garzik 5066c6fd2807SJeff Garzik /** 5067c6fd2807SJeff Garzik * sata_scr_valid - test whether SCRs are accessible 5068c6fd2807SJeff Garzik * @ap: ATA port to test SCR accessibility for 5069c6fd2807SJeff Garzik * 5070c6fd2807SJeff Garzik * Test whether SCRs are accessible for @ap. 5071c6fd2807SJeff Garzik * 5072c6fd2807SJeff Garzik * LOCKING: 5073c6fd2807SJeff Garzik * None. 5074c6fd2807SJeff Garzik * 5075c6fd2807SJeff Garzik * RETURNS: 5076c6fd2807SJeff Garzik * 1 if SCRs are accessible, 0 otherwise. 5077c6fd2807SJeff Garzik */ 5078c6fd2807SJeff Garzik int sata_scr_valid(struct ata_port *ap) 5079c6fd2807SJeff Garzik { 5080c6fd2807SJeff Garzik return ap->cbl == ATA_CBL_SATA && ap->ops->scr_read; 5081c6fd2807SJeff Garzik } 5082c6fd2807SJeff Garzik 5083c6fd2807SJeff Garzik /** 5084c6fd2807SJeff Garzik * sata_scr_read - read SCR register of the specified port 5085c6fd2807SJeff Garzik * @ap: ATA port to read SCR for 5086c6fd2807SJeff Garzik * @reg: SCR to read 5087c6fd2807SJeff Garzik * @val: Place to store read value 5088c6fd2807SJeff Garzik * 5089c6fd2807SJeff Garzik * Read SCR register @reg of @ap into *@val. This function is 5090c6fd2807SJeff Garzik * guaranteed to succeed if the cable type of the port is SATA 5091c6fd2807SJeff Garzik * and the port implements ->scr_read. 5092c6fd2807SJeff Garzik * 5093c6fd2807SJeff Garzik * LOCKING: 5094c6fd2807SJeff Garzik * None. 5095c6fd2807SJeff Garzik * 5096c6fd2807SJeff Garzik * RETURNS: 5097c6fd2807SJeff Garzik * 0 on success, negative errno on failure. 5098c6fd2807SJeff Garzik */ 5099c6fd2807SJeff Garzik int sata_scr_read(struct ata_port *ap, int reg, u32 *val) 5100c6fd2807SJeff Garzik { 5101c6fd2807SJeff Garzik if (sata_scr_valid(ap)) { 5102c6fd2807SJeff Garzik *val = ap->ops->scr_read(ap, reg); 5103c6fd2807SJeff Garzik return 0; 5104c6fd2807SJeff Garzik } 5105c6fd2807SJeff Garzik return -EOPNOTSUPP; 5106c6fd2807SJeff Garzik } 5107c6fd2807SJeff Garzik 5108c6fd2807SJeff Garzik /** 5109c6fd2807SJeff Garzik * sata_scr_write - write SCR register of the specified port 5110c6fd2807SJeff Garzik * @ap: ATA port to write SCR for 5111c6fd2807SJeff Garzik * @reg: SCR to write 5112c6fd2807SJeff Garzik * @val: value to write 5113c6fd2807SJeff Garzik * 5114c6fd2807SJeff Garzik * Write @val to SCR register @reg of @ap. This function is 5115c6fd2807SJeff Garzik * guaranteed to succeed if the cable type of the port is SATA 5116c6fd2807SJeff Garzik * and the port implements ->scr_read. 5117c6fd2807SJeff Garzik * 5118c6fd2807SJeff Garzik * LOCKING: 5119c6fd2807SJeff Garzik * None. 5120c6fd2807SJeff Garzik * 5121c6fd2807SJeff Garzik * RETURNS: 5122c6fd2807SJeff Garzik * 0 on success, negative errno on failure. 5123c6fd2807SJeff Garzik */ 5124c6fd2807SJeff Garzik int sata_scr_write(struct ata_port *ap, int reg, u32 val) 5125c6fd2807SJeff Garzik { 5126c6fd2807SJeff Garzik if (sata_scr_valid(ap)) { 5127c6fd2807SJeff Garzik ap->ops->scr_write(ap, reg, val); 5128c6fd2807SJeff Garzik return 0; 5129c6fd2807SJeff Garzik } 5130c6fd2807SJeff Garzik return -EOPNOTSUPP; 5131c6fd2807SJeff Garzik } 5132c6fd2807SJeff Garzik 5133c6fd2807SJeff Garzik /** 5134c6fd2807SJeff Garzik * sata_scr_write_flush - write SCR register of the specified port and flush 5135c6fd2807SJeff Garzik * @ap: ATA port to write SCR for 5136c6fd2807SJeff Garzik * @reg: SCR to write 5137c6fd2807SJeff Garzik * @val: value to write 5138c6fd2807SJeff Garzik * 5139c6fd2807SJeff Garzik * This function is identical to sata_scr_write() except that this 5140c6fd2807SJeff Garzik * function performs flush after writing to the register. 5141c6fd2807SJeff Garzik * 5142c6fd2807SJeff Garzik * LOCKING: 5143c6fd2807SJeff Garzik * None. 5144c6fd2807SJeff Garzik * 5145c6fd2807SJeff Garzik * RETURNS: 5146c6fd2807SJeff Garzik * 0 on success, negative errno on failure. 5147c6fd2807SJeff Garzik */ 5148c6fd2807SJeff Garzik int sata_scr_write_flush(struct ata_port *ap, int reg, u32 val) 5149c6fd2807SJeff Garzik { 5150c6fd2807SJeff Garzik if (sata_scr_valid(ap)) { 5151c6fd2807SJeff Garzik ap->ops->scr_write(ap, reg, val); 5152c6fd2807SJeff Garzik ap->ops->scr_read(ap, reg); 5153c6fd2807SJeff Garzik return 0; 5154c6fd2807SJeff Garzik } 5155c6fd2807SJeff Garzik return -EOPNOTSUPP; 5156c6fd2807SJeff Garzik } 5157c6fd2807SJeff Garzik 5158c6fd2807SJeff Garzik /** 5159c6fd2807SJeff Garzik * ata_port_online - test whether the given port is online 5160c6fd2807SJeff Garzik * @ap: ATA port to test 5161c6fd2807SJeff Garzik * 5162c6fd2807SJeff Garzik * Test whether @ap is online. Note that this function returns 0 5163c6fd2807SJeff Garzik * if online status of @ap cannot be obtained, so 5164c6fd2807SJeff Garzik * ata_port_online(ap) != !ata_port_offline(ap). 5165c6fd2807SJeff Garzik * 5166c6fd2807SJeff Garzik * LOCKING: 5167c6fd2807SJeff Garzik * None. 5168c6fd2807SJeff Garzik * 5169c6fd2807SJeff Garzik * RETURNS: 5170c6fd2807SJeff Garzik * 1 if the port online status is available and online. 5171c6fd2807SJeff Garzik */ 5172c6fd2807SJeff Garzik int ata_port_online(struct ata_port *ap) 5173c6fd2807SJeff Garzik { 5174c6fd2807SJeff Garzik u32 sstatus; 5175c6fd2807SJeff Garzik 5176c6fd2807SJeff Garzik if (!sata_scr_read(ap, SCR_STATUS, &sstatus) && (sstatus & 0xf) == 0x3) 5177c6fd2807SJeff Garzik return 1; 5178c6fd2807SJeff Garzik return 0; 5179c6fd2807SJeff Garzik } 5180c6fd2807SJeff Garzik 5181c6fd2807SJeff Garzik /** 5182c6fd2807SJeff Garzik * ata_port_offline - test whether the given port is offline 5183c6fd2807SJeff Garzik * @ap: ATA port to test 5184c6fd2807SJeff Garzik * 5185c6fd2807SJeff Garzik * Test whether @ap is offline. Note that this function returns 5186c6fd2807SJeff Garzik * 0 if offline status of @ap cannot be obtained, so 5187c6fd2807SJeff Garzik * ata_port_online(ap) != !ata_port_offline(ap). 5188c6fd2807SJeff Garzik * 5189c6fd2807SJeff Garzik * LOCKING: 5190c6fd2807SJeff Garzik * None. 5191c6fd2807SJeff Garzik * 5192c6fd2807SJeff Garzik * RETURNS: 5193c6fd2807SJeff Garzik * 1 if the port offline status is available and offline. 5194c6fd2807SJeff Garzik */ 5195c6fd2807SJeff Garzik int ata_port_offline(struct ata_port *ap) 5196c6fd2807SJeff Garzik { 5197c6fd2807SJeff Garzik u32 sstatus; 5198c6fd2807SJeff Garzik 5199c6fd2807SJeff Garzik if (!sata_scr_read(ap, SCR_STATUS, &sstatus) && (sstatus & 0xf) != 0x3) 5200c6fd2807SJeff Garzik return 1; 5201c6fd2807SJeff Garzik return 0; 5202c6fd2807SJeff Garzik } 5203c6fd2807SJeff Garzik 5204c6fd2807SJeff Garzik int ata_flush_cache(struct ata_device *dev) 5205c6fd2807SJeff Garzik { 5206c6fd2807SJeff Garzik unsigned int err_mask; 5207c6fd2807SJeff Garzik u8 cmd; 5208c6fd2807SJeff Garzik 5209c6fd2807SJeff Garzik if (!ata_try_flush_cache(dev)) 5210c6fd2807SJeff Garzik return 0; 5211c6fd2807SJeff Garzik 52126fc49adbSTejun Heo if (dev->flags & ATA_DFLAG_FLUSH_EXT) 5213c6fd2807SJeff Garzik cmd = ATA_CMD_FLUSH_EXT; 5214c6fd2807SJeff Garzik else 5215c6fd2807SJeff Garzik cmd = ATA_CMD_FLUSH; 5216c6fd2807SJeff Garzik 5217c6fd2807SJeff Garzik err_mask = ata_do_simple_cmd(dev, cmd); 5218c6fd2807SJeff Garzik if (err_mask) { 5219c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_ERR, "failed to flush cache\n"); 5220c6fd2807SJeff Garzik return -EIO; 5221c6fd2807SJeff Garzik } 5222c6fd2807SJeff Garzik 5223c6fd2807SJeff Garzik return 0; 5224c6fd2807SJeff Garzik } 5225c6fd2807SJeff Garzik 5226cca3974eSJeff Garzik static int ata_host_request_pm(struct ata_host *host, pm_message_t mesg, 5227cca3974eSJeff Garzik unsigned int action, unsigned int ehi_flags, 5228cca3974eSJeff Garzik int wait) 5229c6fd2807SJeff Garzik { 5230c6fd2807SJeff Garzik unsigned long flags; 5231c6fd2807SJeff Garzik int i, rc; 5232c6fd2807SJeff Garzik 5233cca3974eSJeff Garzik for (i = 0; i < host->n_ports; i++) { 5234cca3974eSJeff Garzik struct ata_port *ap = host->ports[i]; 5235c6fd2807SJeff Garzik 5236c6fd2807SJeff Garzik /* Previous resume operation might still be in 5237c6fd2807SJeff Garzik * progress. Wait for PM_PENDING to clear. 5238c6fd2807SJeff Garzik */ 5239c6fd2807SJeff Garzik if (ap->pflags & ATA_PFLAG_PM_PENDING) { 5240c6fd2807SJeff Garzik ata_port_wait_eh(ap); 5241c6fd2807SJeff Garzik WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING); 5242c6fd2807SJeff Garzik } 5243c6fd2807SJeff Garzik 5244c6fd2807SJeff Garzik /* request PM ops to EH */ 5245c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 5246c6fd2807SJeff Garzik 5247c6fd2807SJeff Garzik ap->pm_mesg = mesg; 5248c6fd2807SJeff Garzik if (wait) { 5249c6fd2807SJeff Garzik rc = 0; 5250c6fd2807SJeff Garzik ap->pm_result = &rc; 5251c6fd2807SJeff Garzik } 5252c6fd2807SJeff Garzik 5253c6fd2807SJeff Garzik ap->pflags |= ATA_PFLAG_PM_PENDING; 5254c6fd2807SJeff Garzik ap->eh_info.action |= action; 5255c6fd2807SJeff Garzik ap->eh_info.flags |= ehi_flags; 5256c6fd2807SJeff Garzik 5257c6fd2807SJeff Garzik ata_port_schedule_eh(ap); 5258c6fd2807SJeff Garzik 5259c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 5260c6fd2807SJeff Garzik 5261c6fd2807SJeff Garzik /* wait and check result */ 5262c6fd2807SJeff Garzik if (wait) { 5263c6fd2807SJeff Garzik ata_port_wait_eh(ap); 5264c6fd2807SJeff Garzik WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING); 5265c6fd2807SJeff Garzik if (rc) 5266c6fd2807SJeff Garzik return rc; 5267c6fd2807SJeff Garzik } 5268c6fd2807SJeff Garzik } 5269c6fd2807SJeff Garzik 5270c6fd2807SJeff Garzik return 0; 5271c6fd2807SJeff Garzik } 5272c6fd2807SJeff Garzik 5273c6fd2807SJeff Garzik /** 5274cca3974eSJeff Garzik * ata_host_suspend - suspend host 5275cca3974eSJeff Garzik * @host: host to suspend 5276c6fd2807SJeff Garzik * @mesg: PM message 5277c6fd2807SJeff Garzik * 5278cca3974eSJeff Garzik * Suspend @host. Actual operation is performed by EH. This 5279c6fd2807SJeff Garzik * function requests EH to perform PM operations and waits for EH 5280c6fd2807SJeff Garzik * to finish. 5281c6fd2807SJeff Garzik * 5282c6fd2807SJeff Garzik * LOCKING: 5283c6fd2807SJeff Garzik * Kernel thread context (may sleep). 5284c6fd2807SJeff Garzik * 5285c6fd2807SJeff Garzik * RETURNS: 5286c6fd2807SJeff Garzik * 0 on success, -errno on failure. 5287c6fd2807SJeff Garzik */ 5288cca3974eSJeff Garzik int ata_host_suspend(struct ata_host *host, pm_message_t mesg) 5289c6fd2807SJeff Garzik { 5290c6fd2807SJeff Garzik int i, j, rc; 5291c6fd2807SJeff Garzik 5292cca3974eSJeff Garzik rc = ata_host_request_pm(host, mesg, 0, ATA_EHI_QUIET, 1); 5293c6fd2807SJeff Garzik if (rc) 5294c6fd2807SJeff Garzik goto fail; 5295c6fd2807SJeff Garzik 5296c6fd2807SJeff Garzik /* EH is quiescent now. Fail if we have any ready device. 5297c6fd2807SJeff Garzik * This happens if hotplug occurs between completion of device 5298c6fd2807SJeff Garzik * suspension and here. 5299c6fd2807SJeff Garzik */ 5300cca3974eSJeff Garzik for (i = 0; i < host->n_ports; i++) { 5301cca3974eSJeff Garzik struct ata_port *ap = host->ports[i]; 5302c6fd2807SJeff Garzik 5303c6fd2807SJeff Garzik for (j = 0; j < ATA_MAX_DEVICES; j++) { 5304c6fd2807SJeff Garzik struct ata_device *dev = &ap->device[j]; 5305c6fd2807SJeff Garzik 5306c6fd2807SJeff Garzik if (ata_dev_ready(dev)) { 5307c6fd2807SJeff Garzik ata_port_printk(ap, KERN_WARNING, 5308c6fd2807SJeff Garzik "suspend failed, device %d " 5309c6fd2807SJeff Garzik "still active\n", dev->devno); 5310c6fd2807SJeff Garzik rc = -EBUSY; 5311c6fd2807SJeff Garzik goto fail; 5312c6fd2807SJeff Garzik } 5313c6fd2807SJeff Garzik } 5314c6fd2807SJeff Garzik } 5315c6fd2807SJeff Garzik 5316cca3974eSJeff Garzik host->dev->power.power_state = mesg; 5317c6fd2807SJeff Garzik return 0; 5318c6fd2807SJeff Garzik 5319c6fd2807SJeff Garzik fail: 5320cca3974eSJeff Garzik ata_host_resume(host); 5321c6fd2807SJeff Garzik return rc; 5322c6fd2807SJeff Garzik } 5323c6fd2807SJeff Garzik 5324c6fd2807SJeff Garzik /** 5325cca3974eSJeff Garzik * ata_host_resume - resume host 5326cca3974eSJeff Garzik * @host: host to resume 5327c6fd2807SJeff Garzik * 5328cca3974eSJeff Garzik * Resume @host. Actual operation is performed by EH. This 5329c6fd2807SJeff Garzik * function requests EH to perform PM operations and returns. 5330c6fd2807SJeff Garzik * Note that all resume operations are performed parallely. 5331c6fd2807SJeff Garzik * 5332c6fd2807SJeff Garzik * LOCKING: 5333c6fd2807SJeff Garzik * Kernel thread context (may sleep). 5334c6fd2807SJeff Garzik */ 5335cca3974eSJeff Garzik void ata_host_resume(struct ata_host *host) 5336c6fd2807SJeff Garzik { 5337cca3974eSJeff Garzik ata_host_request_pm(host, PMSG_ON, ATA_EH_SOFTRESET, 5338c6fd2807SJeff Garzik ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET, 0); 5339cca3974eSJeff Garzik host->dev->power.power_state = PMSG_ON; 5340c6fd2807SJeff Garzik } 5341c6fd2807SJeff Garzik 5342c6fd2807SJeff Garzik /** 5343c6fd2807SJeff Garzik * ata_port_start - Set port up for dma. 5344c6fd2807SJeff Garzik * @ap: Port to initialize 5345c6fd2807SJeff Garzik * 5346c6fd2807SJeff Garzik * Called just after data structures for each port are 5347c6fd2807SJeff Garzik * initialized. Allocates space for PRD table. 5348c6fd2807SJeff Garzik * 5349c6fd2807SJeff Garzik * May be used as the port_start() entry in ata_port_operations. 5350c6fd2807SJeff Garzik * 5351c6fd2807SJeff Garzik * LOCKING: 5352c6fd2807SJeff Garzik * Inherited from caller. 5353c6fd2807SJeff Garzik */ 5354c6fd2807SJeff Garzik int ata_port_start(struct ata_port *ap) 5355c6fd2807SJeff Garzik { 5356c6fd2807SJeff Garzik struct device *dev = ap->dev; 5357c6fd2807SJeff Garzik int rc; 5358c6fd2807SJeff Garzik 5359f0d36efdSTejun Heo ap->prd = dmam_alloc_coherent(dev, ATA_PRD_TBL_SZ, &ap->prd_dma, 5360f0d36efdSTejun Heo GFP_KERNEL); 5361c6fd2807SJeff Garzik if (!ap->prd) 5362c6fd2807SJeff Garzik return -ENOMEM; 5363c6fd2807SJeff Garzik 5364c6fd2807SJeff Garzik rc = ata_pad_alloc(ap, dev); 5365f0d36efdSTejun Heo if (rc) 5366c6fd2807SJeff Garzik return rc; 5367c6fd2807SJeff Garzik 5368f0d36efdSTejun Heo DPRINTK("prd alloc, virt %p, dma %llx\n", ap->prd, 5369f0d36efdSTejun Heo (unsigned long long)ap->prd_dma); 5370c6fd2807SJeff Garzik return 0; 5371c6fd2807SJeff Garzik } 5372c6fd2807SJeff Garzik 5373c6fd2807SJeff Garzik /** 5374c6fd2807SJeff Garzik * ata_dev_init - Initialize an ata_device structure 5375c6fd2807SJeff Garzik * @dev: Device structure to initialize 5376c6fd2807SJeff Garzik * 5377c6fd2807SJeff Garzik * Initialize @dev in preparation for probing. 5378c6fd2807SJeff Garzik * 5379c6fd2807SJeff Garzik * LOCKING: 5380c6fd2807SJeff Garzik * Inherited from caller. 5381c6fd2807SJeff Garzik */ 5382c6fd2807SJeff Garzik void ata_dev_init(struct ata_device *dev) 5383c6fd2807SJeff Garzik { 5384c6fd2807SJeff Garzik struct ata_port *ap = dev->ap; 5385c6fd2807SJeff Garzik unsigned long flags; 5386c6fd2807SJeff Garzik 5387c6fd2807SJeff Garzik /* SATA spd limit is bound to the first device */ 5388c6fd2807SJeff Garzik ap->sata_spd_limit = ap->hw_sata_spd_limit; 5389c6fd2807SJeff Garzik 5390c6fd2807SJeff Garzik /* High bits of dev->flags are used to record warm plug 5391c6fd2807SJeff Garzik * requests which occur asynchronously. Synchronize using 5392cca3974eSJeff Garzik * host lock. 5393c6fd2807SJeff Garzik */ 5394c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 5395c6fd2807SJeff Garzik dev->flags &= ~ATA_DFLAG_INIT_MASK; 5396c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 5397c6fd2807SJeff Garzik 5398c6fd2807SJeff Garzik memset((void *)dev + ATA_DEVICE_CLEAR_OFFSET, 0, 5399c6fd2807SJeff Garzik sizeof(*dev) - ATA_DEVICE_CLEAR_OFFSET); 5400c6fd2807SJeff Garzik dev->pio_mask = UINT_MAX; 5401c6fd2807SJeff Garzik dev->mwdma_mask = UINT_MAX; 5402c6fd2807SJeff Garzik dev->udma_mask = UINT_MAX; 5403c6fd2807SJeff Garzik } 5404c6fd2807SJeff Garzik 5405c6fd2807SJeff Garzik /** 5406c6fd2807SJeff Garzik * ata_port_init - Initialize an ata_port structure 5407c6fd2807SJeff Garzik * @ap: Structure to initialize 5408cca3974eSJeff Garzik * @host: Collection of hosts to which @ap belongs 5409c6fd2807SJeff Garzik * @ent: Probe information provided by low-level driver 5410c6fd2807SJeff Garzik * @port_no: Port number associated with this ata_port 5411c6fd2807SJeff Garzik * 5412c6fd2807SJeff Garzik * Initialize a new ata_port structure. 5413c6fd2807SJeff Garzik * 5414c6fd2807SJeff Garzik * LOCKING: 5415c6fd2807SJeff Garzik * Inherited from caller. 5416c6fd2807SJeff Garzik */ 5417cca3974eSJeff Garzik void ata_port_init(struct ata_port *ap, struct ata_host *host, 5418c6fd2807SJeff Garzik const struct ata_probe_ent *ent, unsigned int port_no) 5419c6fd2807SJeff Garzik { 5420c6fd2807SJeff Garzik unsigned int i; 5421c6fd2807SJeff Garzik 5422cca3974eSJeff Garzik ap->lock = &host->lock; 5423c6fd2807SJeff Garzik ap->flags = ATA_FLAG_DISABLED; 5424c6fd2807SJeff Garzik ap->id = ata_unique_id++; 5425c6fd2807SJeff Garzik ap->ctl = ATA_DEVCTL_OBS; 5426cca3974eSJeff Garzik ap->host = host; 5427c6fd2807SJeff Garzik ap->dev = ent->dev; 5428c6fd2807SJeff Garzik ap->port_no = port_no; 5429fea63e38STejun Heo if (port_no == 1 && ent->pinfo2) { 5430fea63e38STejun Heo ap->pio_mask = ent->pinfo2->pio_mask; 5431fea63e38STejun Heo ap->mwdma_mask = ent->pinfo2->mwdma_mask; 5432fea63e38STejun Heo ap->udma_mask = ent->pinfo2->udma_mask; 5433fea63e38STejun Heo ap->flags |= ent->pinfo2->flags; 5434fea63e38STejun Heo ap->ops = ent->pinfo2->port_ops; 5435fea63e38STejun Heo } else { 5436c6fd2807SJeff Garzik ap->pio_mask = ent->pio_mask; 5437c6fd2807SJeff Garzik ap->mwdma_mask = ent->mwdma_mask; 5438c6fd2807SJeff Garzik ap->udma_mask = ent->udma_mask; 5439cca3974eSJeff Garzik ap->flags |= ent->port_flags; 5440c6fd2807SJeff Garzik ap->ops = ent->port_ops; 5441fea63e38STejun Heo } 5442c6fd2807SJeff Garzik ap->hw_sata_spd_limit = UINT_MAX; 5443c6fd2807SJeff Garzik ap->active_tag = ATA_TAG_POISON; 5444c6fd2807SJeff Garzik ap->last_ctl = 0xFF; 5445c6fd2807SJeff Garzik 5446c6fd2807SJeff Garzik #if defined(ATA_VERBOSE_DEBUG) 5447c6fd2807SJeff Garzik /* turn on all debugging levels */ 5448c6fd2807SJeff Garzik ap->msg_enable = 0x00FF; 5449c6fd2807SJeff Garzik #elif defined(ATA_DEBUG) 5450c6fd2807SJeff Garzik ap->msg_enable = ATA_MSG_DRV | ATA_MSG_INFO | ATA_MSG_CTL | ATA_MSG_WARN | ATA_MSG_ERR; 5451c6fd2807SJeff Garzik #else 5452c6fd2807SJeff Garzik ap->msg_enable = ATA_MSG_DRV | ATA_MSG_ERR | ATA_MSG_WARN; 5453c6fd2807SJeff Garzik #endif 5454c6fd2807SJeff Garzik 545565f27f38SDavid Howells INIT_DELAYED_WORK(&ap->port_task, NULL); 545665f27f38SDavid Howells INIT_DELAYED_WORK(&ap->hotplug_task, ata_scsi_hotplug); 545765f27f38SDavid Howells INIT_WORK(&ap->scsi_rescan_task, ata_scsi_dev_rescan); 5458c6fd2807SJeff Garzik INIT_LIST_HEAD(&ap->eh_done_q); 5459c6fd2807SJeff Garzik init_waitqueue_head(&ap->eh_wait_q); 5460c6fd2807SJeff Garzik 5461c6fd2807SJeff Garzik /* set cable type */ 5462c6fd2807SJeff Garzik ap->cbl = ATA_CBL_NONE; 5463c6fd2807SJeff Garzik if (ap->flags & ATA_FLAG_SATA) 5464c6fd2807SJeff Garzik ap->cbl = ATA_CBL_SATA; 5465c6fd2807SJeff Garzik 5466c6fd2807SJeff Garzik for (i = 0; i < ATA_MAX_DEVICES; i++) { 5467c6fd2807SJeff Garzik struct ata_device *dev = &ap->device[i]; 5468c6fd2807SJeff Garzik dev->ap = ap; 5469c6fd2807SJeff Garzik dev->devno = i; 5470c6fd2807SJeff Garzik ata_dev_init(dev); 5471c6fd2807SJeff Garzik } 5472c6fd2807SJeff Garzik 5473c6fd2807SJeff Garzik #ifdef ATA_IRQ_TRAP 5474c6fd2807SJeff Garzik ap->stats.unhandled_irq = 1; 5475c6fd2807SJeff Garzik ap->stats.idle_irq = 1; 5476c6fd2807SJeff Garzik #endif 5477c6fd2807SJeff Garzik 5478c6fd2807SJeff Garzik memcpy(&ap->ioaddr, &ent->port[port_no], sizeof(struct ata_ioports)); 5479c6fd2807SJeff Garzik } 5480c6fd2807SJeff Garzik 5481c6fd2807SJeff Garzik /** 5482c6fd2807SJeff Garzik * ata_port_init_shost - Initialize SCSI host associated with ATA port 5483c6fd2807SJeff Garzik * @ap: ATA port to initialize SCSI host for 5484c6fd2807SJeff Garzik * @shost: SCSI host associated with @ap 5485c6fd2807SJeff Garzik * 5486c6fd2807SJeff Garzik * Initialize SCSI host @shost associated with ATA port @ap. 5487c6fd2807SJeff Garzik * 5488c6fd2807SJeff Garzik * LOCKING: 5489c6fd2807SJeff Garzik * Inherited from caller. 5490c6fd2807SJeff Garzik */ 5491c6fd2807SJeff Garzik static void ata_port_init_shost(struct ata_port *ap, struct Scsi_Host *shost) 5492c6fd2807SJeff Garzik { 5493cca3974eSJeff Garzik ap->scsi_host = shost; 5494c6fd2807SJeff Garzik 5495c6fd2807SJeff Garzik shost->unique_id = ap->id; 5496c6fd2807SJeff Garzik shost->max_id = 16; 5497c6fd2807SJeff Garzik shost->max_lun = 1; 5498c6fd2807SJeff Garzik shost->max_channel = 1; 5499c6fd2807SJeff Garzik shost->max_cmd_len = 12; 5500c6fd2807SJeff Garzik } 5501c6fd2807SJeff Garzik 5502c6fd2807SJeff Garzik /** 5503c6fd2807SJeff Garzik * ata_port_add - Attach low-level ATA driver to system 5504c6fd2807SJeff Garzik * @ent: Information provided by low-level driver 5505cca3974eSJeff Garzik * @host: Collections of ports to which we add 5506c6fd2807SJeff Garzik * @port_no: Port number associated with this host 5507c6fd2807SJeff Garzik * 5508c6fd2807SJeff Garzik * Attach low-level ATA driver to system. 5509c6fd2807SJeff Garzik * 5510c6fd2807SJeff Garzik * LOCKING: 5511c6fd2807SJeff Garzik * PCI/etc. bus probe sem. 5512c6fd2807SJeff Garzik * 5513c6fd2807SJeff Garzik * RETURNS: 5514c6fd2807SJeff Garzik * New ata_port on success, for NULL on error. 5515c6fd2807SJeff Garzik */ 5516c6fd2807SJeff Garzik static struct ata_port * ata_port_add(const struct ata_probe_ent *ent, 5517cca3974eSJeff Garzik struct ata_host *host, 5518c6fd2807SJeff Garzik unsigned int port_no) 5519c6fd2807SJeff Garzik { 5520c6fd2807SJeff Garzik struct Scsi_Host *shost; 5521c6fd2807SJeff Garzik struct ata_port *ap; 5522c6fd2807SJeff Garzik 5523c6fd2807SJeff Garzik DPRINTK("ENTER\n"); 5524c6fd2807SJeff Garzik 5525c6fd2807SJeff Garzik if (!ent->port_ops->error_handler && 5526cca3974eSJeff Garzik !(ent->port_flags & (ATA_FLAG_SATA_RESET | ATA_FLAG_SRST))) { 5527c6fd2807SJeff Garzik printk(KERN_ERR "ata%u: no reset mechanism available\n", 5528c6fd2807SJeff Garzik port_no); 5529c6fd2807SJeff Garzik return NULL; 5530c6fd2807SJeff Garzik } 5531c6fd2807SJeff Garzik 5532c6fd2807SJeff Garzik shost = scsi_host_alloc(ent->sht, sizeof(struct ata_port)); 5533c6fd2807SJeff Garzik if (!shost) 5534c6fd2807SJeff Garzik return NULL; 5535c6fd2807SJeff Garzik 5536c6fd2807SJeff Garzik shost->transportt = &ata_scsi_transport_template; 5537c6fd2807SJeff Garzik 5538c6fd2807SJeff Garzik ap = ata_shost_to_port(shost); 5539c6fd2807SJeff Garzik 5540cca3974eSJeff Garzik ata_port_init(ap, host, ent, port_no); 5541c6fd2807SJeff Garzik ata_port_init_shost(ap, shost); 5542c6fd2807SJeff Garzik 5543c6fd2807SJeff Garzik return ap; 5544c6fd2807SJeff Garzik } 5545c6fd2807SJeff Garzik 5546f0d36efdSTejun Heo static void ata_host_release(struct device *gendev, void *res) 5547f0d36efdSTejun Heo { 5548f0d36efdSTejun Heo struct ata_host *host = dev_get_drvdata(gendev); 5549f0d36efdSTejun Heo int i; 5550f0d36efdSTejun Heo 5551f0d36efdSTejun Heo for (i = 0; i < host->n_ports; i++) { 5552f0d36efdSTejun Heo struct ata_port *ap = host->ports[i]; 5553f0d36efdSTejun Heo 5554f0d36efdSTejun Heo if (!ap) 5555f0d36efdSTejun Heo continue; 5556f0d36efdSTejun Heo 5557f0d36efdSTejun Heo if (ap->ops->port_stop) 5558f0d36efdSTejun Heo ap->ops->port_stop(ap); 5559f0d36efdSTejun Heo 5560f0d36efdSTejun Heo scsi_host_put(ap->scsi_host); 5561f0d36efdSTejun Heo } 5562f0d36efdSTejun Heo 5563f0d36efdSTejun Heo if (host->ops->host_stop) 5564f0d36efdSTejun Heo host->ops->host_stop(host); 5565f0d36efdSTejun Heo } 5566f0d36efdSTejun Heo 5567c6fd2807SJeff Garzik /** 5568cca3974eSJeff Garzik * ata_sas_host_init - Initialize a host struct 5569cca3974eSJeff Garzik * @host: host to initialize 5570cca3974eSJeff Garzik * @dev: device host is attached to 5571cca3974eSJeff Garzik * @flags: host flags 5572c6fd2807SJeff Garzik * @ops: port_ops 5573c6fd2807SJeff Garzik * 5574c6fd2807SJeff Garzik * LOCKING: 5575c6fd2807SJeff Garzik * PCI/etc. bus probe sem. 5576c6fd2807SJeff Garzik * 5577c6fd2807SJeff Garzik */ 5578c6fd2807SJeff Garzik 5579cca3974eSJeff Garzik void ata_host_init(struct ata_host *host, struct device *dev, 5580cca3974eSJeff Garzik unsigned long flags, const struct ata_port_operations *ops) 5581c6fd2807SJeff Garzik { 5582cca3974eSJeff Garzik spin_lock_init(&host->lock); 5583cca3974eSJeff Garzik host->dev = dev; 5584cca3974eSJeff Garzik host->flags = flags; 5585cca3974eSJeff Garzik host->ops = ops; 5586c6fd2807SJeff Garzik } 5587c6fd2807SJeff Garzik 5588c6fd2807SJeff Garzik /** 5589c6fd2807SJeff Garzik * ata_device_add - Register hardware device with ATA and SCSI layers 5590c6fd2807SJeff Garzik * @ent: Probe information describing hardware device to be registered 5591c6fd2807SJeff Garzik * 5592c6fd2807SJeff Garzik * This function processes the information provided in the probe 5593c6fd2807SJeff Garzik * information struct @ent, allocates the necessary ATA and SCSI 5594c6fd2807SJeff Garzik * host information structures, initializes them, and registers 5595c6fd2807SJeff Garzik * everything with requisite kernel subsystems. 5596c6fd2807SJeff Garzik * 5597c6fd2807SJeff Garzik * This function requests irqs, probes the ATA bus, and probes 5598c6fd2807SJeff Garzik * the SCSI bus. 5599c6fd2807SJeff Garzik * 5600c6fd2807SJeff Garzik * LOCKING: 5601c6fd2807SJeff Garzik * PCI/etc. bus probe sem. 5602c6fd2807SJeff Garzik * 5603c6fd2807SJeff Garzik * RETURNS: 5604c6fd2807SJeff Garzik * Number of ports registered. Zero on error (no ports registered). 5605c6fd2807SJeff Garzik */ 5606c6fd2807SJeff Garzik int ata_device_add(const struct ata_probe_ent *ent) 5607c6fd2807SJeff Garzik { 5608c6fd2807SJeff Garzik unsigned int i; 5609c6fd2807SJeff Garzik struct device *dev = ent->dev; 5610cca3974eSJeff Garzik struct ata_host *host; 5611c6fd2807SJeff Garzik int rc; 5612c6fd2807SJeff Garzik 5613c6fd2807SJeff Garzik DPRINTK("ENTER\n"); 561402f076aaSAlan Cox 561502f076aaSAlan Cox if (ent->irq == 0) { 561602f076aaSAlan Cox dev_printk(KERN_ERR, dev, "is not available: No interrupt assigned.\n"); 561702f076aaSAlan Cox return 0; 561802f076aaSAlan Cox } 5619f0d36efdSTejun Heo 5620f0d36efdSTejun Heo if (!devres_open_group(dev, ata_device_add, GFP_KERNEL)) 5621f0d36efdSTejun Heo return 0; 5622f0d36efdSTejun Heo 5623c6fd2807SJeff Garzik /* alloc a container for our list of ATA ports (buses) */ 5624f0d36efdSTejun Heo host = devres_alloc(ata_host_release, sizeof(struct ata_host) + 5625c6fd2807SJeff Garzik (ent->n_ports * sizeof(void *)), GFP_KERNEL); 5626cca3974eSJeff Garzik if (!host) 5627f0d36efdSTejun Heo goto err_out; 5628f0d36efdSTejun Heo devres_add(dev, host); 5629f0d36efdSTejun Heo dev_set_drvdata(dev, host); 5630c6fd2807SJeff Garzik 5631cca3974eSJeff Garzik ata_host_init(host, dev, ent->_host_flags, ent->port_ops); 5632cca3974eSJeff Garzik host->n_ports = ent->n_ports; 5633cca3974eSJeff Garzik host->irq = ent->irq; 5634cca3974eSJeff Garzik host->irq2 = ent->irq2; 56350d5ff566STejun Heo host->iomap = ent->iomap; 5636cca3974eSJeff Garzik host->private_data = ent->private_data; 5637c6fd2807SJeff Garzik 5638c6fd2807SJeff Garzik /* register each port bound to this device */ 5639cca3974eSJeff Garzik for (i = 0; i < host->n_ports; i++) { 5640c6fd2807SJeff Garzik struct ata_port *ap; 5641c6fd2807SJeff Garzik unsigned long xfer_mode_mask; 5642c6fd2807SJeff Garzik int irq_line = ent->irq; 5643c6fd2807SJeff Garzik 5644cca3974eSJeff Garzik ap = ata_port_add(ent, host, i); 5645c38778c3SDave Jones host->ports[i] = ap; 5646c6fd2807SJeff Garzik if (!ap) 5647c6fd2807SJeff Garzik goto err_out; 5648c6fd2807SJeff Garzik 5649c6fd2807SJeff Garzik /* dummy? */ 5650c6fd2807SJeff Garzik if (ent->dummy_port_mask & (1 << i)) { 5651c6fd2807SJeff Garzik ata_port_printk(ap, KERN_INFO, "DUMMY\n"); 5652c6fd2807SJeff Garzik ap->ops = &ata_dummy_port_ops; 5653c6fd2807SJeff Garzik continue; 5654c6fd2807SJeff Garzik } 5655c6fd2807SJeff Garzik 5656c6fd2807SJeff Garzik /* start port */ 5657c6fd2807SJeff Garzik rc = ap->ops->port_start(ap); 5658c6fd2807SJeff Garzik if (rc) { 5659cca3974eSJeff Garzik host->ports[i] = NULL; 5660cca3974eSJeff Garzik scsi_host_put(ap->scsi_host); 5661c6fd2807SJeff Garzik goto err_out; 5662c6fd2807SJeff Garzik } 5663c6fd2807SJeff Garzik 5664c6fd2807SJeff Garzik /* Report the secondary IRQ for second channel legacy */ 5665c6fd2807SJeff Garzik if (i == 1 && ent->irq2) 5666c6fd2807SJeff Garzik irq_line = ent->irq2; 5667c6fd2807SJeff Garzik 5668c6fd2807SJeff Garzik xfer_mode_mask =(ap->udma_mask << ATA_SHIFT_UDMA) | 5669c6fd2807SJeff Garzik (ap->mwdma_mask << ATA_SHIFT_MWDMA) | 5670c6fd2807SJeff Garzik (ap->pio_mask << ATA_SHIFT_PIO); 5671c6fd2807SJeff Garzik 5672c6fd2807SJeff Garzik /* print per-port info to dmesg */ 56730d5ff566STejun Heo ata_port_printk(ap, KERN_INFO, "%cATA max %s cmd 0x%p " 56740d5ff566STejun Heo "ctl 0x%p bmdma 0x%p irq %d\n", 5675c6fd2807SJeff Garzik ap->flags & ATA_FLAG_SATA ? 'S' : 'P', 5676c6fd2807SJeff Garzik ata_mode_string(xfer_mode_mask), 5677c6fd2807SJeff Garzik ap->ioaddr.cmd_addr, 5678c6fd2807SJeff Garzik ap->ioaddr.ctl_addr, 5679c6fd2807SJeff Garzik ap->ioaddr.bmdma_addr, 5680c6fd2807SJeff Garzik irq_line); 5681c6fd2807SJeff Garzik 56820f0a3ad3STejun Heo /* freeze port before requesting IRQ */ 56830f0a3ad3STejun Heo ata_eh_freeze_port(ap); 5684c6fd2807SJeff Garzik } 5685c6fd2807SJeff Garzik 5686c6fd2807SJeff Garzik /* obtain irq, that may be shared between channels */ 5687f0d36efdSTejun Heo rc = devm_request_irq(dev, ent->irq, ent->port_ops->irq_handler, 5688f0d36efdSTejun Heo ent->irq_flags, DRV_NAME, host); 5689c6fd2807SJeff Garzik if (rc) { 5690c6fd2807SJeff Garzik dev_printk(KERN_ERR, dev, "irq %lu request failed: %d\n", 5691c6fd2807SJeff Garzik ent->irq, rc); 5692c6fd2807SJeff Garzik goto err_out; 5693c6fd2807SJeff Garzik } 5694c6fd2807SJeff Garzik 5695c6fd2807SJeff Garzik /* do we have a second IRQ for the other channel, eg legacy mode */ 5696c6fd2807SJeff Garzik if (ent->irq2) { 5697c6fd2807SJeff Garzik /* We will get weird core code crashes later if this is true 5698c6fd2807SJeff Garzik so trap it now */ 5699c6fd2807SJeff Garzik BUG_ON(ent->irq == ent->irq2); 5700c6fd2807SJeff Garzik 5701f0d36efdSTejun Heo rc = devm_request_irq(dev, ent->irq2, 5702f0d36efdSTejun Heo ent->port_ops->irq_handler, ent->irq_flags, 5703cca3974eSJeff Garzik DRV_NAME, host); 5704c6fd2807SJeff Garzik if (rc) { 5705c6fd2807SJeff Garzik dev_printk(KERN_ERR, dev, "irq %lu request failed: %d\n", 5706c6fd2807SJeff Garzik ent->irq2, rc); 5707f0d36efdSTejun Heo goto err_out; 5708c6fd2807SJeff Garzik } 5709c6fd2807SJeff Garzik } 5710c6fd2807SJeff Garzik 5711f0d36efdSTejun Heo /* resource acquisition complete */ 5712b878ca5dSTejun Heo devres_remove_group(dev, ata_device_add); 5713f0d36efdSTejun Heo 5714c6fd2807SJeff Garzik /* perform each probe synchronously */ 5715c6fd2807SJeff Garzik DPRINTK("probe begin\n"); 5716cca3974eSJeff Garzik for (i = 0; i < host->n_ports; i++) { 5717cca3974eSJeff Garzik struct ata_port *ap = host->ports[i]; 5718c6fd2807SJeff Garzik u32 scontrol; 5719c6fd2807SJeff Garzik int rc; 5720c6fd2807SJeff Garzik 5721c6fd2807SJeff Garzik /* init sata_spd_limit to the current value */ 5722c6fd2807SJeff Garzik if (sata_scr_read(ap, SCR_CONTROL, &scontrol) == 0) { 5723c6fd2807SJeff Garzik int spd = (scontrol >> 4) & 0xf; 5724c6fd2807SJeff Garzik ap->hw_sata_spd_limit &= (1 << spd) - 1; 5725c6fd2807SJeff Garzik } 5726c6fd2807SJeff Garzik ap->sata_spd_limit = ap->hw_sata_spd_limit; 5727c6fd2807SJeff Garzik 5728cca3974eSJeff Garzik rc = scsi_add_host(ap->scsi_host, dev); 5729c6fd2807SJeff Garzik if (rc) { 5730c6fd2807SJeff Garzik ata_port_printk(ap, KERN_ERR, "scsi_add_host failed\n"); 5731c6fd2807SJeff Garzik /* FIXME: do something useful here */ 5732c6fd2807SJeff Garzik /* FIXME: handle unconditional calls to 5733c6fd2807SJeff Garzik * scsi_scan_host and ata_host_remove, below, 5734c6fd2807SJeff Garzik * at the very least 5735c6fd2807SJeff Garzik */ 5736c6fd2807SJeff Garzik } 5737c6fd2807SJeff Garzik 5738c6fd2807SJeff Garzik if (ap->ops->error_handler) { 5739c6fd2807SJeff Garzik struct ata_eh_info *ehi = &ap->eh_info; 5740c6fd2807SJeff Garzik unsigned long flags; 5741c6fd2807SJeff Garzik 5742c6fd2807SJeff Garzik ata_port_probe(ap); 5743c6fd2807SJeff Garzik 5744c6fd2807SJeff Garzik /* kick EH for boot probing */ 5745c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 5746c6fd2807SJeff Garzik 5747c6fd2807SJeff Garzik ehi->probe_mask = (1 << ATA_MAX_DEVICES) - 1; 5748c6fd2807SJeff Garzik ehi->action |= ATA_EH_SOFTRESET; 5749c6fd2807SJeff Garzik ehi->flags |= ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET; 5750c6fd2807SJeff Garzik 5751c6fd2807SJeff Garzik ap->pflags |= ATA_PFLAG_LOADING; 5752c6fd2807SJeff Garzik ata_port_schedule_eh(ap); 5753c6fd2807SJeff Garzik 5754c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 5755c6fd2807SJeff Garzik 5756c6fd2807SJeff Garzik /* wait for EH to finish */ 5757c6fd2807SJeff Garzik ata_port_wait_eh(ap); 5758c6fd2807SJeff Garzik } else { 5759c6fd2807SJeff Garzik DPRINTK("ata%u: bus probe begin\n", ap->id); 5760c6fd2807SJeff Garzik rc = ata_bus_probe(ap); 5761c6fd2807SJeff Garzik DPRINTK("ata%u: bus probe end\n", ap->id); 5762c6fd2807SJeff Garzik 5763c6fd2807SJeff Garzik if (rc) { 5764c6fd2807SJeff Garzik /* FIXME: do something useful here? 5765c6fd2807SJeff Garzik * Current libata behavior will 5766c6fd2807SJeff Garzik * tear down everything when 5767c6fd2807SJeff Garzik * the module is removed 5768c6fd2807SJeff Garzik * or the h/w is unplugged. 5769c6fd2807SJeff Garzik */ 5770c6fd2807SJeff Garzik } 5771c6fd2807SJeff Garzik } 5772c6fd2807SJeff Garzik } 5773c6fd2807SJeff Garzik 5774c6fd2807SJeff Garzik /* probes are done, now scan each port's disk(s) */ 5775c6fd2807SJeff Garzik DPRINTK("host probe begin\n"); 5776cca3974eSJeff Garzik for (i = 0; i < host->n_ports; i++) { 5777cca3974eSJeff Garzik struct ata_port *ap = host->ports[i]; 5778c6fd2807SJeff Garzik 5779c6fd2807SJeff Garzik ata_scsi_scan_host(ap); 5780c6fd2807SJeff Garzik } 5781c6fd2807SJeff Garzik 5782c6fd2807SJeff Garzik VPRINTK("EXIT, returning %u\n", ent->n_ports); 5783c6fd2807SJeff Garzik return ent->n_ports; /* success */ 5784c6fd2807SJeff Garzik 5785c6fd2807SJeff Garzik err_out: 5786f0d36efdSTejun Heo devres_release_group(dev, ata_device_add); 5787f0d36efdSTejun Heo dev_set_drvdata(dev, NULL); 5788f0d36efdSTejun Heo VPRINTK("EXIT, returning %d\n", rc); 5789c6fd2807SJeff Garzik return 0; 5790c6fd2807SJeff Garzik } 5791c6fd2807SJeff Garzik 5792c6fd2807SJeff Garzik /** 5793c6fd2807SJeff Garzik * ata_port_detach - Detach ATA port in prepration of device removal 5794c6fd2807SJeff Garzik * @ap: ATA port to be detached 5795c6fd2807SJeff Garzik * 5796c6fd2807SJeff Garzik * Detach all ATA devices and the associated SCSI devices of @ap; 5797c6fd2807SJeff Garzik * then, remove the associated SCSI host. @ap is guaranteed to 5798c6fd2807SJeff Garzik * be quiescent on return from this function. 5799c6fd2807SJeff Garzik * 5800c6fd2807SJeff Garzik * LOCKING: 5801c6fd2807SJeff Garzik * Kernel thread context (may sleep). 5802c6fd2807SJeff Garzik */ 5803c6fd2807SJeff Garzik void ata_port_detach(struct ata_port *ap) 5804c6fd2807SJeff Garzik { 5805c6fd2807SJeff Garzik unsigned long flags; 5806c6fd2807SJeff Garzik int i; 5807c6fd2807SJeff Garzik 5808c6fd2807SJeff Garzik if (!ap->ops->error_handler) 5809c6fd2807SJeff Garzik goto skip_eh; 5810c6fd2807SJeff Garzik 5811c6fd2807SJeff Garzik /* tell EH we're leaving & flush EH */ 5812c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 5813c6fd2807SJeff Garzik ap->pflags |= ATA_PFLAG_UNLOADING; 5814c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 5815c6fd2807SJeff Garzik 5816c6fd2807SJeff Garzik ata_port_wait_eh(ap); 5817c6fd2807SJeff Garzik 5818c6fd2807SJeff Garzik /* EH is now guaranteed to see UNLOADING, so no new device 5819c6fd2807SJeff Garzik * will be attached. Disable all existing devices. 5820c6fd2807SJeff Garzik */ 5821c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 5822c6fd2807SJeff Garzik 5823c6fd2807SJeff Garzik for (i = 0; i < ATA_MAX_DEVICES; i++) 5824c6fd2807SJeff Garzik ata_dev_disable(&ap->device[i]); 5825c6fd2807SJeff Garzik 5826c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 5827c6fd2807SJeff Garzik 5828c6fd2807SJeff Garzik /* Final freeze & EH. All in-flight commands are aborted. EH 5829c6fd2807SJeff Garzik * will be skipped and retrials will be terminated with bad 5830c6fd2807SJeff Garzik * target. 5831c6fd2807SJeff Garzik */ 5832c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 5833c6fd2807SJeff Garzik ata_port_freeze(ap); /* won't be thawed */ 5834c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 5835c6fd2807SJeff Garzik 5836c6fd2807SJeff Garzik ata_port_wait_eh(ap); 5837c6fd2807SJeff Garzik 5838c6fd2807SJeff Garzik /* Flush hotplug task. The sequence is similar to 5839c6fd2807SJeff Garzik * ata_port_flush_task(). 5840c6fd2807SJeff Garzik */ 5841c6fd2807SJeff Garzik flush_workqueue(ata_aux_wq); 5842c6fd2807SJeff Garzik cancel_delayed_work(&ap->hotplug_task); 5843c6fd2807SJeff Garzik flush_workqueue(ata_aux_wq); 5844c6fd2807SJeff Garzik 5845c6fd2807SJeff Garzik skip_eh: 5846c6fd2807SJeff Garzik /* remove the associated SCSI host */ 5847cca3974eSJeff Garzik scsi_remove_host(ap->scsi_host); 5848c6fd2807SJeff Garzik } 5849c6fd2807SJeff Garzik 5850c6fd2807SJeff Garzik /** 58510529c159STejun Heo * ata_host_detach - Detach all ports of an ATA host 58520529c159STejun Heo * @host: Host to detach 58530529c159STejun Heo * 58540529c159STejun Heo * Detach all ports of @host. 58550529c159STejun Heo * 58560529c159STejun Heo * LOCKING: 58570529c159STejun Heo * Kernel thread context (may sleep). 58580529c159STejun Heo */ 58590529c159STejun Heo void ata_host_detach(struct ata_host *host) 58600529c159STejun Heo { 58610529c159STejun Heo int i; 58620529c159STejun Heo 58630529c159STejun Heo for (i = 0; i < host->n_ports; i++) 58640529c159STejun Heo ata_port_detach(host->ports[i]); 58650529c159STejun Heo } 58660529c159STejun Heo 5867c6fd2807SJeff Garzik struct ata_probe_ent * 5868c6fd2807SJeff Garzik ata_probe_ent_alloc(struct device *dev, const struct ata_port_info *port) 5869c6fd2807SJeff Garzik { 5870c6fd2807SJeff Garzik struct ata_probe_ent *probe_ent; 5871c6fd2807SJeff Garzik 5872f0d36efdSTejun Heo /* XXX - the following if can go away once all LLDs are managed */ 5873f0d36efdSTejun Heo if (!list_empty(&dev->devres_head)) 5874f0d36efdSTejun Heo probe_ent = devm_kzalloc(dev, sizeof(*probe_ent), GFP_KERNEL); 5875f0d36efdSTejun Heo else 5876c6fd2807SJeff Garzik probe_ent = kzalloc(sizeof(*probe_ent), GFP_KERNEL); 5877c6fd2807SJeff Garzik if (!probe_ent) { 5878c6fd2807SJeff Garzik printk(KERN_ERR DRV_NAME "(%s): out of memory\n", 5879c6fd2807SJeff Garzik kobject_name(&(dev->kobj))); 5880c6fd2807SJeff Garzik return NULL; 5881c6fd2807SJeff Garzik } 5882c6fd2807SJeff Garzik 5883c6fd2807SJeff Garzik INIT_LIST_HEAD(&probe_ent->node); 5884c6fd2807SJeff Garzik probe_ent->dev = dev; 5885c6fd2807SJeff Garzik 5886c6fd2807SJeff Garzik probe_ent->sht = port->sht; 5887cca3974eSJeff Garzik probe_ent->port_flags = port->flags; 5888c6fd2807SJeff Garzik probe_ent->pio_mask = port->pio_mask; 5889c6fd2807SJeff Garzik probe_ent->mwdma_mask = port->mwdma_mask; 5890c6fd2807SJeff Garzik probe_ent->udma_mask = port->udma_mask; 5891c6fd2807SJeff Garzik probe_ent->port_ops = port->port_ops; 5892d639ca94SJeff Garzik probe_ent->private_data = port->private_data; 5893c6fd2807SJeff Garzik 5894c6fd2807SJeff Garzik return probe_ent; 5895c6fd2807SJeff Garzik } 5896c6fd2807SJeff Garzik 5897c6fd2807SJeff Garzik /** 5898c6fd2807SJeff Garzik * ata_std_ports - initialize ioaddr with standard port offsets. 5899c6fd2807SJeff Garzik * @ioaddr: IO address structure to be initialized 5900c6fd2807SJeff Garzik * 5901c6fd2807SJeff Garzik * Utility function which initializes data_addr, error_addr, 5902c6fd2807SJeff Garzik * feature_addr, nsect_addr, lbal_addr, lbam_addr, lbah_addr, 5903c6fd2807SJeff Garzik * device_addr, status_addr, and command_addr to standard offsets 5904c6fd2807SJeff Garzik * relative to cmd_addr. 5905c6fd2807SJeff Garzik * 5906c6fd2807SJeff Garzik * Does not set ctl_addr, altstatus_addr, bmdma_addr, or scr_addr. 5907c6fd2807SJeff Garzik */ 5908c6fd2807SJeff Garzik 5909c6fd2807SJeff Garzik void ata_std_ports(struct ata_ioports *ioaddr) 5910c6fd2807SJeff Garzik { 5911c6fd2807SJeff Garzik ioaddr->data_addr = ioaddr->cmd_addr + ATA_REG_DATA; 5912c6fd2807SJeff Garzik ioaddr->error_addr = ioaddr->cmd_addr + ATA_REG_ERR; 5913c6fd2807SJeff Garzik ioaddr->feature_addr = ioaddr->cmd_addr + ATA_REG_FEATURE; 5914c6fd2807SJeff Garzik ioaddr->nsect_addr = ioaddr->cmd_addr + ATA_REG_NSECT; 5915c6fd2807SJeff Garzik ioaddr->lbal_addr = ioaddr->cmd_addr + ATA_REG_LBAL; 5916c6fd2807SJeff Garzik ioaddr->lbam_addr = ioaddr->cmd_addr + ATA_REG_LBAM; 5917c6fd2807SJeff Garzik ioaddr->lbah_addr = ioaddr->cmd_addr + ATA_REG_LBAH; 5918c6fd2807SJeff Garzik ioaddr->device_addr = ioaddr->cmd_addr + ATA_REG_DEVICE; 5919c6fd2807SJeff Garzik ioaddr->status_addr = ioaddr->cmd_addr + ATA_REG_STATUS; 5920c6fd2807SJeff Garzik ioaddr->command_addr = ioaddr->cmd_addr + ATA_REG_CMD; 5921c6fd2807SJeff Garzik } 5922c6fd2807SJeff Garzik 5923c6fd2807SJeff Garzik 5924c6fd2807SJeff Garzik #ifdef CONFIG_PCI 5925c6fd2807SJeff Garzik 5926c6fd2807SJeff Garzik /** 5927c6fd2807SJeff Garzik * ata_pci_remove_one - PCI layer callback for device removal 5928c6fd2807SJeff Garzik * @pdev: PCI device that was removed 5929c6fd2807SJeff Garzik * 5930b878ca5dSTejun Heo * PCI layer indicates to libata via this hook that hot-unplug or 5931b878ca5dSTejun Heo * module unload event has occurred. Detach all ports. Resource 5932b878ca5dSTejun Heo * release is handled via devres. 5933c6fd2807SJeff Garzik * 5934c6fd2807SJeff Garzik * LOCKING: 5935c6fd2807SJeff Garzik * Inherited from PCI layer (may sleep). 5936c6fd2807SJeff Garzik */ 5937c6fd2807SJeff Garzik void ata_pci_remove_one(struct pci_dev *pdev) 5938c6fd2807SJeff Garzik { 5939c6fd2807SJeff Garzik struct device *dev = pci_dev_to_dev(pdev); 5940cca3974eSJeff Garzik struct ata_host *host = dev_get_drvdata(dev); 5941c6fd2807SJeff Garzik 5942f0d36efdSTejun Heo ata_host_detach(host); 5943c6fd2807SJeff Garzik } 5944c6fd2807SJeff Garzik 5945c6fd2807SJeff Garzik /* move to PCI subsystem */ 5946c6fd2807SJeff Garzik int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits) 5947c6fd2807SJeff Garzik { 5948c6fd2807SJeff Garzik unsigned long tmp = 0; 5949c6fd2807SJeff Garzik 5950c6fd2807SJeff Garzik switch (bits->width) { 5951c6fd2807SJeff Garzik case 1: { 5952c6fd2807SJeff Garzik u8 tmp8 = 0; 5953c6fd2807SJeff Garzik pci_read_config_byte(pdev, bits->reg, &tmp8); 5954c6fd2807SJeff Garzik tmp = tmp8; 5955c6fd2807SJeff Garzik break; 5956c6fd2807SJeff Garzik } 5957c6fd2807SJeff Garzik case 2: { 5958c6fd2807SJeff Garzik u16 tmp16 = 0; 5959c6fd2807SJeff Garzik pci_read_config_word(pdev, bits->reg, &tmp16); 5960c6fd2807SJeff Garzik tmp = tmp16; 5961c6fd2807SJeff Garzik break; 5962c6fd2807SJeff Garzik } 5963c6fd2807SJeff Garzik case 4: { 5964c6fd2807SJeff Garzik u32 tmp32 = 0; 5965c6fd2807SJeff Garzik pci_read_config_dword(pdev, bits->reg, &tmp32); 5966c6fd2807SJeff Garzik tmp = tmp32; 5967c6fd2807SJeff Garzik break; 5968c6fd2807SJeff Garzik } 5969c6fd2807SJeff Garzik 5970c6fd2807SJeff Garzik default: 5971c6fd2807SJeff Garzik return -EINVAL; 5972c6fd2807SJeff Garzik } 5973c6fd2807SJeff Garzik 5974c6fd2807SJeff Garzik tmp &= bits->mask; 5975c6fd2807SJeff Garzik 5976c6fd2807SJeff Garzik return (tmp == bits->val) ? 1 : 0; 5977c6fd2807SJeff Garzik } 5978c6fd2807SJeff Garzik 5979c6fd2807SJeff Garzik void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg) 5980c6fd2807SJeff Garzik { 5981c6fd2807SJeff Garzik pci_save_state(pdev); 5982c6fd2807SJeff Garzik 5983c6fd2807SJeff Garzik if (mesg.event == PM_EVENT_SUSPEND) { 5984c6fd2807SJeff Garzik pci_disable_device(pdev); 5985c6fd2807SJeff Garzik pci_set_power_state(pdev, PCI_D3hot); 5986c6fd2807SJeff Garzik } 5987c6fd2807SJeff Garzik } 5988c6fd2807SJeff Garzik 5989553c4aa6STejun Heo int ata_pci_device_do_resume(struct pci_dev *pdev) 5990c6fd2807SJeff Garzik { 5991553c4aa6STejun Heo int rc; 5992553c4aa6STejun Heo 5993c6fd2807SJeff Garzik pci_set_power_state(pdev, PCI_D0); 5994c6fd2807SJeff Garzik pci_restore_state(pdev); 5995553c4aa6STejun Heo 5996f0d36efdSTejun Heo rc = pcim_enable_device(pdev); 5997553c4aa6STejun Heo if (rc) { 5998553c4aa6STejun Heo dev_printk(KERN_ERR, &pdev->dev, 5999553c4aa6STejun Heo "failed to enable device after resume (%d)\n", rc); 6000553c4aa6STejun Heo return rc; 6001553c4aa6STejun Heo } 6002553c4aa6STejun Heo 6003c6fd2807SJeff Garzik pci_set_master(pdev); 6004553c4aa6STejun Heo return 0; 6005c6fd2807SJeff Garzik } 6006c6fd2807SJeff Garzik 6007c6fd2807SJeff Garzik int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg) 6008c6fd2807SJeff Garzik { 6009cca3974eSJeff Garzik struct ata_host *host = dev_get_drvdata(&pdev->dev); 6010c6fd2807SJeff Garzik int rc = 0; 6011c6fd2807SJeff Garzik 6012cca3974eSJeff Garzik rc = ata_host_suspend(host, mesg); 6013c6fd2807SJeff Garzik if (rc) 6014c6fd2807SJeff Garzik return rc; 6015c6fd2807SJeff Garzik 6016c6fd2807SJeff Garzik ata_pci_device_do_suspend(pdev, mesg); 6017c6fd2807SJeff Garzik 6018c6fd2807SJeff Garzik return 0; 6019c6fd2807SJeff Garzik } 6020c6fd2807SJeff Garzik 6021c6fd2807SJeff Garzik int ata_pci_device_resume(struct pci_dev *pdev) 6022c6fd2807SJeff Garzik { 6023cca3974eSJeff Garzik struct ata_host *host = dev_get_drvdata(&pdev->dev); 6024553c4aa6STejun Heo int rc; 6025c6fd2807SJeff Garzik 6026553c4aa6STejun Heo rc = ata_pci_device_do_resume(pdev); 6027553c4aa6STejun Heo if (rc == 0) 6028cca3974eSJeff Garzik ata_host_resume(host); 6029553c4aa6STejun Heo return rc; 6030c6fd2807SJeff Garzik } 6031c6fd2807SJeff Garzik #endif /* CONFIG_PCI */ 6032c6fd2807SJeff Garzik 6033c6fd2807SJeff Garzik 6034c6fd2807SJeff Garzik static int __init ata_init(void) 6035c6fd2807SJeff Garzik { 6036c6fd2807SJeff Garzik ata_probe_timeout *= HZ; 6037c6fd2807SJeff Garzik ata_wq = create_workqueue("ata"); 6038c6fd2807SJeff Garzik if (!ata_wq) 6039c6fd2807SJeff Garzik return -ENOMEM; 6040c6fd2807SJeff Garzik 6041c6fd2807SJeff Garzik ata_aux_wq = create_singlethread_workqueue("ata_aux"); 6042c6fd2807SJeff Garzik if (!ata_aux_wq) { 6043c6fd2807SJeff Garzik destroy_workqueue(ata_wq); 6044c6fd2807SJeff Garzik return -ENOMEM; 6045c6fd2807SJeff Garzik } 6046c6fd2807SJeff Garzik 6047c6fd2807SJeff Garzik printk(KERN_DEBUG "libata version " DRV_VERSION " loaded.\n"); 6048c6fd2807SJeff Garzik return 0; 6049c6fd2807SJeff Garzik } 6050c6fd2807SJeff Garzik 6051c6fd2807SJeff Garzik static void __exit ata_exit(void) 6052c6fd2807SJeff Garzik { 6053c6fd2807SJeff Garzik destroy_workqueue(ata_wq); 6054c6fd2807SJeff Garzik destroy_workqueue(ata_aux_wq); 6055c6fd2807SJeff Garzik } 6056c6fd2807SJeff Garzik 6057a4625085SBrian King subsys_initcall(ata_init); 6058c6fd2807SJeff Garzik module_exit(ata_exit); 6059c6fd2807SJeff Garzik 6060c6fd2807SJeff Garzik static unsigned long ratelimit_time; 6061c6fd2807SJeff Garzik static DEFINE_SPINLOCK(ata_ratelimit_lock); 6062c6fd2807SJeff Garzik 6063c6fd2807SJeff Garzik int ata_ratelimit(void) 6064c6fd2807SJeff Garzik { 6065c6fd2807SJeff Garzik int rc; 6066c6fd2807SJeff Garzik unsigned long flags; 6067c6fd2807SJeff Garzik 6068c6fd2807SJeff Garzik spin_lock_irqsave(&ata_ratelimit_lock, flags); 6069c6fd2807SJeff Garzik 6070c6fd2807SJeff Garzik if (time_after(jiffies, ratelimit_time)) { 6071c6fd2807SJeff Garzik rc = 1; 6072c6fd2807SJeff Garzik ratelimit_time = jiffies + (HZ/5); 6073c6fd2807SJeff Garzik } else 6074c6fd2807SJeff Garzik rc = 0; 6075c6fd2807SJeff Garzik 6076c6fd2807SJeff Garzik spin_unlock_irqrestore(&ata_ratelimit_lock, flags); 6077c6fd2807SJeff Garzik 6078c6fd2807SJeff Garzik return rc; 6079c6fd2807SJeff Garzik } 6080c6fd2807SJeff Garzik 6081c6fd2807SJeff Garzik /** 6082c6fd2807SJeff Garzik * ata_wait_register - wait until register value changes 6083c6fd2807SJeff Garzik * @reg: IO-mapped register 6084c6fd2807SJeff Garzik * @mask: Mask to apply to read register value 6085c6fd2807SJeff Garzik * @val: Wait condition 6086c6fd2807SJeff Garzik * @interval_msec: polling interval in milliseconds 6087c6fd2807SJeff Garzik * @timeout_msec: timeout in milliseconds 6088c6fd2807SJeff Garzik * 6089c6fd2807SJeff Garzik * Waiting for some bits of register to change is a common 6090c6fd2807SJeff Garzik * operation for ATA controllers. This function reads 32bit LE 6091c6fd2807SJeff Garzik * IO-mapped register @reg and tests for the following condition. 6092c6fd2807SJeff Garzik * 6093c6fd2807SJeff Garzik * (*@reg & mask) != val 6094c6fd2807SJeff Garzik * 6095c6fd2807SJeff Garzik * If the condition is met, it returns; otherwise, the process is 6096c6fd2807SJeff Garzik * repeated after @interval_msec until timeout. 6097c6fd2807SJeff Garzik * 6098c6fd2807SJeff Garzik * LOCKING: 6099c6fd2807SJeff Garzik * Kernel thread context (may sleep) 6100c6fd2807SJeff Garzik * 6101c6fd2807SJeff Garzik * RETURNS: 6102c6fd2807SJeff Garzik * The final register value. 6103c6fd2807SJeff Garzik */ 6104c6fd2807SJeff Garzik u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val, 6105c6fd2807SJeff Garzik unsigned long interval_msec, 6106c6fd2807SJeff Garzik unsigned long timeout_msec) 6107c6fd2807SJeff Garzik { 6108c6fd2807SJeff Garzik unsigned long timeout; 6109c6fd2807SJeff Garzik u32 tmp; 6110c6fd2807SJeff Garzik 6111c6fd2807SJeff Garzik tmp = ioread32(reg); 6112c6fd2807SJeff Garzik 6113c6fd2807SJeff Garzik /* Calculate timeout _after_ the first read to make sure 6114c6fd2807SJeff Garzik * preceding writes reach the controller before starting to 6115c6fd2807SJeff Garzik * eat away the timeout. 6116c6fd2807SJeff Garzik */ 6117c6fd2807SJeff Garzik timeout = jiffies + (timeout_msec * HZ) / 1000; 6118c6fd2807SJeff Garzik 6119c6fd2807SJeff Garzik while ((tmp & mask) == val && time_before(jiffies, timeout)) { 6120c6fd2807SJeff Garzik msleep(interval_msec); 6121c6fd2807SJeff Garzik tmp = ioread32(reg); 6122c6fd2807SJeff Garzik } 6123c6fd2807SJeff Garzik 6124c6fd2807SJeff Garzik return tmp; 6125c6fd2807SJeff Garzik } 6126c6fd2807SJeff Garzik 6127c6fd2807SJeff Garzik /* 6128c6fd2807SJeff Garzik * Dummy port_ops 6129c6fd2807SJeff Garzik */ 6130c6fd2807SJeff Garzik static void ata_dummy_noret(struct ata_port *ap) { } 6131c6fd2807SJeff Garzik static int ata_dummy_ret0(struct ata_port *ap) { return 0; } 6132c6fd2807SJeff Garzik static void ata_dummy_qc_noret(struct ata_queued_cmd *qc) { } 6133c6fd2807SJeff Garzik 6134c6fd2807SJeff Garzik static u8 ata_dummy_check_status(struct ata_port *ap) 6135c6fd2807SJeff Garzik { 6136c6fd2807SJeff Garzik return ATA_DRDY; 6137c6fd2807SJeff Garzik } 6138c6fd2807SJeff Garzik 6139c6fd2807SJeff Garzik static unsigned int ata_dummy_qc_issue(struct ata_queued_cmd *qc) 6140c6fd2807SJeff Garzik { 6141c6fd2807SJeff Garzik return AC_ERR_SYSTEM; 6142c6fd2807SJeff Garzik } 6143c6fd2807SJeff Garzik 6144c6fd2807SJeff Garzik const struct ata_port_operations ata_dummy_port_ops = { 6145c6fd2807SJeff Garzik .port_disable = ata_port_disable, 6146c6fd2807SJeff Garzik .check_status = ata_dummy_check_status, 6147c6fd2807SJeff Garzik .check_altstatus = ata_dummy_check_status, 6148c6fd2807SJeff Garzik .dev_select = ata_noop_dev_select, 6149c6fd2807SJeff Garzik .qc_prep = ata_noop_qc_prep, 6150c6fd2807SJeff Garzik .qc_issue = ata_dummy_qc_issue, 6151c6fd2807SJeff Garzik .freeze = ata_dummy_noret, 6152c6fd2807SJeff Garzik .thaw = ata_dummy_noret, 6153c6fd2807SJeff Garzik .error_handler = ata_dummy_noret, 6154c6fd2807SJeff Garzik .post_internal_cmd = ata_dummy_qc_noret, 6155c6fd2807SJeff Garzik .irq_clear = ata_dummy_noret, 6156c6fd2807SJeff Garzik .port_start = ata_dummy_ret0, 6157c6fd2807SJeff Garzik .port_stop = ata_dummy_noret, 6158c6fd2807SJeff Garzik }; 6159c6fd2807SJeff Garzik 6160c6fd2807SJeff Garzik /* 6161c6fd2807SJeff Garzik * libata is essentially a library of internal helper functions for 6162c6fd2807SJeff Garzik * low-level ATA host controller drivers. As such, the API/ABI is 6163c6fd2807SJeff Garzik * likely to change as new drivers are added and updated. 6164c6fd2807SJeff Garzik * Do not depend on ABI/API stability. 6165c6fd2807SJeff Garzik */ 6166c6fd2807SJeff Garzik 6167c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(sata_deb_timing_normal); 6168c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(sata_deb_timing_hotplug); 6169c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(sata_deb_timing_long); 6170c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_dummy_port_ops); 6171c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_std_bios_param); 6172c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_std_ports); 6173cca3974eSJeff Garzik EXPORT_SYMBOL_GPL(ata_host_init); 6174c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_device_add); 61750529c159STejun Heo EXPORT_SYMBOL_GPL(ata_host_detach); 6176c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_sg_init); 6177c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_sg_init_one); 6178c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_hsm_move); 6179c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_qc_complete); 6180c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_qc_complete_multiple); 6181c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_qc_issue_prot); 6182c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_tf_load); 6183c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_tf_read); 6184c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_noop_dev_select); 6185c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_std_dev_select); 6186c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_tf_to_fis); 6187c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_tf_from_fis); 6188c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_check_status); 6189c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_altstatus); 6190c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_exec_command); 6191c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_port_start); 6192c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_interrupt); 61930d5ff566STejun Heo EXPORT_SYMBOL_GPL(ata_data_xfer); 61940d5ff566STejun Heo EXPORT_SYMBOL_GPL(ata_data_xfer_noirq); 6195c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_qc_prep); 6196c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_noop_qc_prep); 6197c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_bmdma_setup); 6198c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_bmdma_start); 6199c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_bmdma_irq_clear); 6200c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_bmdma_status); 6201c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_bmdma_stop); 6202c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_bmdma_freeze); 6203c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_bmdma_thaw); 6204c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_bmdma_drive_eh); 6205c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_bmdma_error_handler); 6206c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_bmdma_post_internal_cmd); 6207c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_port_probe); 6208c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(sata_set_spd); 6209c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(sata_phy_debounce); 6210c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(sata_phy_resume); 6211c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(sata_phy_reset); 6212c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(__sata_phy_reset); 6213c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_bus_reset); 6214c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_std_prereset); 6215c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_std_softreset); 6216b6103f6dSTejun Heo EXPORT_SYMBOL_GPL(sata_port_hardreset); 6217c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(sata_std_hardreset); 6218c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_std_postreset); 6219c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_dev_classify); 6220c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_dev_pair); 6221c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_port_disable); 6222c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_ratelimit); 6223c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_wait_register); 6224c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_busy_sleep); 6225c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_port_queue_task); 6226c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_scsi_ioctl); 6227c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_scsi_queuecmd); 6228c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_scsi_slave_config); 6229c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_scsi_slave_destroy); 6230c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_scsi_change_queue_depth); 6231c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_host_intr); 6232c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(sata_scr_valid); 6233c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(sata_scr_read); 6234c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(sata_scr_write); 6235c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(sata_scr_write_flush); 6236c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_port_online); 6237c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_port_offline); 6238cca3974eSJeff Garzik EXPORT_SYMBOL_GPL(ata_host_suspend); 6239cca3974eSJeff Garzik EXPORT_SYMBOL_GPL(ata_host_resume); 6240c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_id_string); 6241c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_id_c_string); 62426919a0a6SAlan Cox EXPORT_SYMBOL_GPL(ata_device_blacklisted); 6243c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_scsi_simulate); 6244c6fd2807SJeff Garzik 6245c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_pio_need_iordy); 6246c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_timing_compute); 6247c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_timing_merge); 6248c6fd2807SJeff Garzik 6249c6fd2807SJeff Garzik #ifdef CONFIG_PCI 6250c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(pci_test_config_bits); 6251c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_pci_init_native_mode); 6252c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_pci_init_one); 6253c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_pci_remove_one); 6254c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_pci_device_do_suspend); 6255c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_pci_device_do_resume); 6256c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_pci_device_suspend); 6257c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_pci_device_resume); 6258c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_pci_default_filter); 6259c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_pci_clear_simplex); 6260c6fd2807SJeff Garzik #endif /* CONFIG_PCI */ 6261c6fd2807SJeff Garzik 6262c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_scsi_device_suspend); 6263c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_scsi_device_resume); 6264c6fd2807SJeff Garzik 6265c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_eng_timeout); 6266c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_port_schedule_eh); 6267c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_port_abort); 6268c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_port_freeze); 6269c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_eh_freeze_port); 6270c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_eh_thaw_port); 6271c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_eh_qc_complete); 6272c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_eh_qc_retry); 6273c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_do_eh); 6274