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 9611ef697bSKristen Carlson Accardi int noacpi; 9711ef697bSKristen Carlson Accardi module_param(noacpi, int, 0444); 9811ef697bSKristen Carlson Accardi MODULE_PARM_DESC(noacpi, "Disables the use of ACPI in suspend/resume when set"); 9911ef697bSKristen Carlson Accardi 100c6fd2807SJeff Garzik MODULE_AUTHOR("Jeff Garzik"); 101c6fd2807SJeff Garzik MODULE_DESCRIPTION("Library module for ATA devices"); 102c6fd2807SJeff Garzik MODULE_LICENSE("GPL"); 103c6fd2807SJeff Garzik MODULE_VERSION(DRV_VERSION); 104c6fd2807SJeff Garzik 105c6fd2807SJeff Garzik 106c6fd2807SJeff Garzik /** 107c6fd2807SJeff Garzik * ata_tf_to_fis - Convert ATA taskfile to SATA FIS structure 108c6fd2807SJeff Garzik * @tf: Taskfile to convert 109c6fd2807SJeff Garzik * @fis: Buffer into which data will output 110c6fd2807SJeff Garzik * @pmp: Port multiplier port 111c6fd2807SJeff Garzik * 112c6fd2807SJeff Garzik * Converts a standard ATA taskfile to a Serial ATA 113c6fd2807SJeff Garzik * FIS structure (Register - Host to Device). 114c6fd2807SJeff Garzik * 115c6fd2807SJeff Garzik * LOCKING: 116c6fd2807SJeff Garzik * Inherited from caller. 117c6fd2807SJeff Garzik */ 118c6fd2807SJeff Garzik 119c6fd2807SJeff Garzik void ata_tf_to_fis(const struct ata_taskfile *tf, u8 *fis, u8 pmp) 120c6fd2807SJeff Garzik { 121c6fd2807SJeff Garzik fis[0] = 0x27; /* Register - Host to Device FIS */ 122c6fd2807SJeff Garzik fis[1] = (pmp & 0xf) | (1 << 7); /* Port multiplier number, 123c6fd2807SJeff Garzik bit 7 indicates Command FIS */ 124c6fd2807SJeff Garzik fis[2] = tf->command; 125c6fd2807SJeff Garzik fis[3] = tf->feature; 126c6fd2807SJeff Garzik 127c6fd2807SJeff Garzik fis[4] = tf->lbal; 128c6fd2807SJeff Garzik fis[5] = tf->lbam; 129c6fd2807SJeff Garzik fis[6] = tf->lbah; 130c6fd2807SJeff Garzik fis[7] = tf->device; 131c6fd2807SJeff Garzik 132c6fd2807SJeff Garzik fis[8] = tf->hob_lbal; 133c6fd2807SJeff Garzik fis[9] = tf->hob_lbam; 134c6fd2807SJeff Garzik fis[10] = tf->hob_lbah; 135c6fd2807SJeff Garzik fis[11] = tf->hob_feature; 136c6fd2807SJeff Garzik 137c6fd2807SJeff Garzik fis[12] = tf->nsect; 138c6fd2807SJeff Garzik fis[13] = tf->hob_nsect; 139c6fd2807SJeff Garzik fis[14] = 0; 140c6fd2807SJeff Garzik fis[15] = tf->ctl; 141c6fd2807SJeff Garzik 142c6fd2807SJeff Garzik fis[16] = 0; 143c6fd2807SJeff Garzik fis[17] = 0; 144c6fd2807SJeff Garzik fis[18] = 0; 145c6fd2807SJeff Garzik fis[19] = 0; 146c6fd2807SJeff Garzik } 147c6fd2807SJeff Garzik 148c6fd2807SJeff Garzik /** 149c6fd2807SJeff Garzik * ata_tf_from_fis - Convert SATA FIS to ATA taskfile 150c6fd2807SJeff Garzik * @fis: Buffer from which data will be input 151c6fd2807SJeff Garzik * @tf: Taskfile to output 152c6fd2807SJeff Garzik * 153c6fd2807SJeff Garzik * Converts a serial ATA FIS structure to a standard ATA taskfile. 154c6fd2807SJeff Garzik * 155c6fd2807SJeff Garzik * LOCKING: 156c6fd2807SJeff Garzik * Inherited from caller. 157c6fd2807SJeff Garzik */ 158c6fd2807SJeff Garzik 159c6fd2807SJeff Garzik void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf) 160c6fd2807SJeff Garzik { 161c6fd2807SJeff Garzik tf->command = fis[2]; /* status */ 162c6fd2807SJeff Garzik tf->feature = fis[3]; /* error */ 163c6fd2807SJeff Garzik 164c6fd2807SJeff Garzik tf->lbal = fis[4]; 165c6fd2807SJeff Garzik tf->lbam = fis[5]; 166c6fd2807SJeff Garzik tf->lbah = fis[6]; 167c6fd2807SJeff Garzik tf->device = fis[7]; 168c6fd2807SJeff Garzik 169c6fd2807SJeff Garzik tf->hob_lbal = fis[8]; 170c6fd2807SJeff Garzik tf->hob_lbam = fis[9]; 171c6fd2807SJeff Garzik tf->hob_lbah = fis[10]; 172c6fd2807SJeff Garzik 173c6fd2807SJeff Garzik tf->nsect = fis[12]; 174c6fd2807SJeff Garzik tf->hob_nsect = fis[13]; 175c6fd2807SJeff Garzik } 176c6fd2807SJeff Garzik 177c6fd2807SJeff Garzik static const u8 ata_rw_cmds[] = { 178c6fd2807SJeff Garzik /* pio multi */ 179c6fd2807SJeff Garzik ATA_CMD_READ_MULTI, 180c6fd2807SJeff Garzik ATA_CMD_WRITE_MULTI, 181c6fd2807SJeff Garzik ATA_CMD_READ_MULTI_EXT, 182c6fd2807SJeff Garzik ATA_CMD_WRITE_MULTI_EXT, 183c6fd2807SJeff Garzik 0, 184c6fd2807SJeff Garzik 0, 185c6fd2807SJeff Garzik 0, 186c6fd2807SJeff Garzik ATA_CMD_WRITE_MULTI_FUA_EXT, 187c6fd2807SJeff Garzik /* pio */ 188c6fd2807SJeff Garzik ATA_CMD_PIO_READ, 189c6fd2807SJeff Garzik ATA_CMD_PIO_WRITE, 190c6fd2807SJeff Garzik ATA_CMD_PIO_READ_EXT, 191c6fd2807SJeff Garzik ATA_CMD_PIO_WRITE_EXT, 192c6fd2807SJeff Garzik 0, 193c6fd2807SJeff Garzik 0, 194c6fd2807SJeff Garzik 0, 195c6fd2807SJeff Garzik 0, 196c6fd2807SJeff Garzik /* dma */ 197c6fd2807SJeff Garzik ATA_CMD_READ, 198c6fd2807SJeff Garzik ATA_CMD_WRITE, 199c6fd2807SJeff Garzik ATA_CMD_READ_EXT, 200c6fd2807SJeff Garzik ATA_CMD_WRITE_EXT, 201c6fd2807SJeff Garzik 0, 202c6fd2807SJeff Garzik 0, 203c6fd2807SJeff Garzik 0, 204c6fd2807SJeff Garzik ATA_CMD_WRITE_FUA_EXT 205c6fd2807SJeff Garzik }; 206c6fd2807SJeff Garzik 207c6fd2807SJeff Garzik /** 208c6fd2807SJeff Garzik * ata_rwcmd_protocol - set taskfile r/w commands and protocol 209bd056d7eSTejun Heo * @tf: command to examine and configure 210bd056d7eSTejun Heo * @dev: device tf belongs to 211c6fd2807SJeff Garzik * 212c6fd2807SJeff Garzik * Examine the device configuration and tf->flags to calculate 213c6fd2807SJeff Garzik * the proper read/write commands and protocol to use. 214c6fd2807SJeff Garzik * 215c6fd2807SJeff Garzik * LOCKING: 216c6fd2807SJeff Garzik * caller. 217c6fd2807SJeff Garzik */ 218bd056d7eSTejun Heo static int ata_rwcmd_protocol(struct ata_taskfile *tf, struct ata_device *dev) 219c6fd2807SJeff Garzik { 220c6fd2807SJeff Garzik u8 cmd; 221c6fd2807SJeff Garzik 222c6fd2807SJeff Garzik int index, fua, lba48, write; 223c6fd2807SJeff Garzik 224c6fd2807SJeff Garzik fua = (tf->flags & ATA_TFLAG_FUA) ? 4 : 0; 225c6fd2807SJeff Garzik lba48 = (tf->flags & ATA_TFLAG_LBA48) ? 2 : 0; 226c6fd2807SJeff Garzik write = (tf->flags & ATA_TFLAG_WRITE) ? 1 : 0; 227c6fd2807SJeff Garzik 228c6fd2807SJeff Garzik if (dev->flags & ATA_DFLAG_PIO) { 229c6fd2807SJeff Garzik tf->protocol = ATA_PROT_PIO; 230c6fd2807SJeff Garzik index = dev->multi_count ? 0 : 8; 231bd056d7eSTejun Heo } else if (lba48 && (dev->ap->flags & ATA_FLAG_PIO_LBA48)) { 232c6fd2807SJeff Garzik /* Unable to use DMA due to host limitation */ 233c6fd2807SJeff Garzik tf->protocol = ATA_PROT_PIO; 234c6fd2807SJeff Garzik index = dev->multi_count ? 0 : 8; 235c6fd2807SJeff Garzik } else { 236c6fd2807SJeff Garzik tf->protocol = ATA_PROT_DMA; 237c6fd2807SJeff Garzik index = 16; 238c6fd2807SJeff Garzik } 239c6fd2807SJeff Garzik 240c6fd2807SJeff Garzik cmd = ata_rw_cmds[index + fua + lba48 + write]; 241c6fd2807SJeff Garzik if (cmd) { 242c6fd2807SJeff Garzik tf->command = cmd; 243c6fd2807SJeff Garzik return 0; 244c6fd2807SJeff Garzik } 245c6fd2807SJeff Garzik return -1; 246c6fd2807SJeff Garzik } 247c6fd2807SJeff Garzik 248c6fd2807SJeff Garzik /** 24935b649feSTejun Heo * ata_tf_read_block - Read block address from ATA taskfile 25035b649feSTejun Heo * @tf: ATA taskfile of interest 25135b649feSTejun Heo * @dev: ATA device @tf belongs to 25235b649feSTejun Heo * 25335b649feSTejun Heo * LOCKING: 25435b649feSTejun Heo * None. 25535b649feSTejun Heo * 25635b649feSTejun Heo * Read block address from @tf. This function can handle all 25735b649feSTejun Heo * three address formats - LBA, LBA48 and CHS. tf->protocol and 25835b649feSTejun Heo * flags select the address format to use. 25935b649feSTejun Heo * 26035b649feSTejun Heo * RETURNS: 26135b649feSTejun Heo * Block address read from @tf. 26235b649feSTejun Heo */ 26335b649feSTejun Heo u64 ata_tf_read_block(struct ata_taskfile *tf, struct ata_device *dev) 26435b649feSTejun Heo { 26535b649feSTejun Heo u64 block = 0; 26635b649feSTejun Heo 26735b649feSTejun Heo if (tf->flags & ATA_TFLAG_LBA) { 26835b649feSTejun Heo if (tf->flags & ATA_TFLAG_LBA48) { 26935b649feSTejun Heo block |= (u64)tf->hob_lbah << 40; 27035b649feSTejun Heo block |= (u64)tf->hob_lbam << 32; 27135b649feSTejun Heo block |= tf->hob_lbal << 24; 27235b649feSTejun Heo } else 27335b649feSTejun Heo block |= (tf->device & 0xf) << 24; 27435b649feSTejun Heo 27535b649feSTejun Heo block |= tf->lbah << 16; 27635b649feSTejun Heo block |= tf->lbam << 8; 27735b649feSTejun Heo block |= tf->lbal; 27835b649feSTejun Heo } else { 27935b649feSTejun Heo u32 cyl, head, sect; 28035b649feSTejun Heo 28135b649feSTejun Heo cyl = tf->lbam | (tf->lbah << 8); 28235b649feSTejun Heo head = tf->device & 0xf; 28335b649feSTejun Heo sect = tf->lbal; 28435b649feSTejun Heo 28535b649feSTejun Heo block = (cyl * dev->heads + head) * dev->sectors + sect; 28635b649feSTejun Heo } 28735b649feSTejun Heo 28835b649feSTejun Heo return block; 28935b649feSTejun Heo } 29035b649feSTejun Heo 29135b649feSTejun Heo /** 292bd056d7eSTejun Heo * ata_build_rw_tf - Build ATA taskfile for given read/write request 293bd056d7eSTejun Heo * @tf: Target ATA taskfile 294bd056d7eSTejun Heo * @dev: ATA device @tf belongs to 295bd056d7eSTejun Heo * @block: Block address 296bd056d7eSTejun Heo * @n_block: Number of blocks 297bd056d7eSTejun Heo * @tf_flags: RW/FUA etc... 298bd056d7eSTejun Heo * @tag: tag 299bd056d7eSTejun Heo * 300bd056d7eSTejun Heo * LOCKING: 301bd056d7eSTejun Heo * None. 302bd056d7eSTejun Heo * 303bd056d7eSTejun Heo * Build ATA taskfile @tf for read/write request described by 304bd056d7eSTejun Heo * @block, @n_block, @tf_flags and @tag on @dev. 305bd056d7eSTejun Heo * 306bd056d7eSTejun Heo * RETURNS: 307bd056d7eSTejun Heo * 308bd056d7eSTejun Heo * 0 on success, -ERANGE if the request is too large for @dev, 309bd056d7eSTejun Heo * -EINVAL if the request is invalid. 310bd056d7eSTejun Heo */ 311bd056d7eSTejun Heo int ata_build_rw_tf(struct ata_taskfile *tf, struct ata_device *dev, 312bd056d7eSTejun Heo u64 block, u32 n_block, unsigned int tf_flags, 313bd056d7eSTejun Heo unsigned int tag) 314bd056d7eSTejun Heo { 315bd056d7eSTejun Heo tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 316bd056d7eSTejun Heo tf->flags |= tf_flags; 317bd056d7eSTejun Heo 318bd056d7eSTejun Heo if ((dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ_OFF | 31970e6ad0cSTejun Heo ATA_DFLAG_NCQ)) == ATA_DFLAG_NCQ && 32070e6ad0cSTejun Heo likely(tag != ATA_TAG_INTERNAL)) { 321bd056d7eSTejun Heo /* yay, NCQ */ 322bd056d7eSTejun Heo if (!lba_48_ok(block, n_block)) 323bd056d7eSTejun Heo return -ERANGE; 324bd056d7eSTejun Heo 325bd056d7eSTejun Heo tf->protocol = ATA_PROT_NCQ; 326bd056d7eSTejun Heo tf->flags |= ATA_TFLAG_LBA | ATA_TFLAG_LBA48; 327bd056d7eSTejun Heo 328bd056d7eSTejun Heo if (tf->flags & ATA_TFLAG_WRITE) 329bd056d7eSTejun Heo tf->command = ATA_CMD_FPDMA_WRITE; 330bd056d7eSTejun Heo else 331bd056d7eSTejun Heo tf->command = ATA_CMD_FPDMA_READ; 332bd056d7eSTejun Heo 333bd056d7eSTejun Heo tf->nsect = tag << 3; 334bd056d7eSTejun Heo tf->hob_feature = (n_block >> 8) & 0xff; 335bd056d7eSTejun Heo tf->feature = n_block & 0xff; 336bd056d7eSTejun Heo 337bd056d7eSTejun Heo tf->hob_lbah = (block >> 40) & 0xff; 338bd056d7eSTejun Heo tf->hob_lbam = (block >> 32) & 0xff; 339bd056d7eSTejun Heo tf->hob_lbal = (block >> 24) & 0xff; 340bd056d7eSTejun Heo tf->lbah = (block >> 16) & 0xff; 341bd056d7eSTejun Heo tf->lbam = (block >> 8) & 0xff; 342bd056d7eSTejun Heo tf->lbal = block & 0xff; 343bd056d7eSTejun Heo 344bd056d7eSTejun Heo tf->device = 1 << 6; 345bd056d7eSTejun Heo if (tf->flags & ATA_TFLAG_FUA) 346bd056d7eSTejun Heo tf->device |= 1 << 7; 347bd056d7eSTejun Heo } else if (dev->flags & ATA_DFLAG_LBA) { 348bd056d7eSTejun Heo tf->flags |= ATA_TFLAG_LBA; 349bd056d7eSTejun Heo 350bd056d7eSTejun Heo if (lba_28_ok(block, n_block)) { 351bd056d7eSTejun Heo /* use LBA28 */ 352bd056d7eSTejun Heo tf->device |= (block >> 24) & 0xf; 353bd056d7eSTejun Heo } else if (lba_48_ok(block, n_block)) { 354bd056d7eSTejun Heo if (!(dev->flags & ATA_DFLAG_LBA48)) 355bd056d7eSTejun Heo return -ERANGE; 356bd056d7eSTejun Heo 357bd056d7eSTejun Heo /* use LBA48 */ 358bd056d7eSTejun Heo tf->flags |= ATA_TFLAG_LBA48; 359bd056d7eSTejun Heo 360bd056d7eSTejun Heo tf->hob_nsect = (n_block >> 8) & 0xff; 361bd056d7eSTejun Heo 362bd056d7eSTejun Heo tf->hob_lbah = (block >> 40) & 0xff; 363bd056d7eSTejun Heo tf->hob_lbam = (block >> 32) & 0xff; 364bd056d7eSTejun Heo tf->hob_lbal = (block >> 24) & 0xff; 365bd056d7eSTejun Heo } else 366bd056d7eSTejun Heo /* request too large even for LBA48 */ 367bd056d7eSTejun Heo return -ERANGE; 368bd056d7eSTejun Heo 369bd056d7eSTejun Heo if (unlikely(ata_rwcmd_protocol(tf, dev) < 0)) 370bd056d7eSTejun Heo return -EINVAL; 371bd056d7eSTejun Heo 372bd056d7eSTejun Heo tf->nsect = n_block & 0xff; 373bd056d7eSTejun Heo 374bd056d7eSTejun Heo tf->lbah = (block >> 16) & 0xff; 375bd056d7eSTejun Heo tf->lbam = (block >> 8) & 0xff; 376bd056d7eSTejun Heo tf->lbal = block & 0xff; 377bd056d7eSTejun Heo 378bd056d7eSTejun Heo tf->device |= ATA_LBA; 379bd056d7eSTejun Heo } else { 380bd056d7eSTejun Heo /* CHS */ 381bd056d7eSTejun Heo u32 sect, head, cyl, track; 382bd056d7eSTejun Heo 383bd056d7eSTejun Heo /* The request -may- be too large for CHS addressing. */ 384bd056d7eSTejun Heo if (!lba_28_ok(block, n_block)) 385bd056d7eSTejun Heo return -ERANGE; 386bd056d7eSTejun Heo 387bd056d7eSTejun Heo if (unlikely(ata_rwcmd_protocol(tf, dev) < 0)) 388bd056d7eSTejun Heo return -EINVAL; 389bd056d7eSTejun Heo 390bd056d7eSTejun Heo /* Convert LBA to CHS */ 391bd056d7eSTejun Heo track = (u32)block / dev->sectors; 392bd056d7eSTejun Heo cyl = track / dev->heads; 393bd056d7eSTejun Heo head = track % dev->heads; 394bd056d7eSTejun Heo sect = (u32)block % dev->sectors + 1; 395bd056d7eSTejun Heo 396bd056d7eSTejun Heo DPRINTK("block %u track %u cyl %u head %u sect %u\n", 397bd056d7eSTejun Heo (u32)block, track, cyl, head, sect); 398bd056d7eSTejun Heo 399bd056d7eSTejun Heo /* Check whether the converted CHS can fit. 400bd056d7eSTejun Heo Cylinder: 0-65535 401bd056d7eSTejun Heo Head: 0-15 402bd056d7eSTejun Heo Sector: 1-255*/ 403bd056d7eSTejun Heo if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect)) 404bd056d7eSTejun Heo return -ERANGE; 405bd056d7eSTejun Heo 406bd056d7eSTejun Heo tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */ 407bd056d7eSTejun Heo tf->lbal = sect; 408bd056d7eSTejun Heo tf->lbam = cyl; 409bd056d7eSTejun Heo tf->lbah = cyl >> 8; 410bd056d7eSTejun Heo tf->device |= head; 411bd056d7eSTejun Heo } 412bd056d7eSTejun Heo 413bd056d7eSTejun Heo return 0; 414bd056d7eSTejun Heo } 415bd056d7eSTejun Heo 416bd056d7eSTejun Heo /** 417c6fd2807SJeff Garzik * ata_pack_xfermask - Pack pio, mwdma and udma masks into xfer_mask 418c6fd2807SJeff Garzik * @pio_mask: pio_mask 419c6fd2807SJeff Garzik * @mwdma_mask: mwdma_mask 420c6fd2807SJeff Garzik * @udma_mask: udma_mask 421c6fd2807SJeff Garzik * 422c6fd2807SJeff Garzik * Pack @pio_mask, @mwdma_mask and @udma_mask into a single 423c6fd2807SJeff Garzik * unsigned int xfer_mask. 424c6fd2807SJeff Garzik * 425c6fd2807SJeff Garzik * LOCKING: 426c6fd2807SJeff Garzik * None. 427c6fd2807SJeff Garzik * 428c6fd2807SJeff Garzik * RETURNS: 429c6fd2807SJeff Garzik * Packed xfer_mask. 430c6fd2807SJeff Garzik */ 431c6fd2807SJeff Garzik static unsigned int ata_pack_xfermask(unsigned int pio_mask, 432c6fd2807SJeff Garzik unsigned int mwdma_mask, 433c6fd2807SJeff Garzik unsigned int udma_mask) 434c6fd2807SJeff Garzik { 435c6fd2807SJeff Garzik return ((pio_mask << ATA_SHIFT_PIO) & ATA_MASK_PIO) | 436c6fd2807SJeff Garzik ((mwdma_mask << ATA_SHIFT_MWDMA) & ATA_MASK_MWDMA) | 437c6fd2807SJeff Garzik ((udma_mask << ATA_SHIFT_UDMA) & ATA_MASK_UDMA); 438c6fd2807SJeff Garzik } 439c6fd2807SJeff Garzik 440c6fd2807SJeff Garzik /** 441c6fd2807SJeff Garzik * ata_unpack_xfermask - Unpack xfer_mask into pio, mwdma and udma masks 442c6fd2807SJeff Garzik * @xfer_mask: xfer_mask to unpack 443c6fd2807SJeff Garzik * @pio_mask: resulting pio_mask 444c6fd2807SJeff Garzik * @mwdma_mask: resulting mwdma_mask 445c6fd2807SJeff Garzik * @udma_mask: resulting udma_mask 446c6fd2807SJeff Garzik * 447c6fd2807SJeff Garzik * Unpack @xfer_mask into @pio_mask, @mwdma_mask and @udma_mask. 448c6fd2807SJeff Garzik * Any NULL distination masks will be ignored. 449c6fd2807SJeff Garzik */ 450c6fd2807SJeff Garzik static void ata_unpack_xfermask(unsigned int xfer_mask, 451c6fd2807SJeff Garzik unsigned int *pio_mask, 452c6fd2807SJeff Garzik unsigned int *mwdma_mask, 453c6fd2807SJeff Garzik unsigned int *udma_mask) 454c6fd2807SJeff Garzik { 455c6fd2807SJeff Garzik if (pio_mask) 456c6fd2807SJeff Garzik *pio_mask = (xfer_mask & ATA_MASK_PIO) >> ATA_SHIFT_PIO; 457c6fd2807SJeff Garzik if (mwdma_mask) 458c6fd2807SJeff Garzik *mwdma_mask = (xfer_mask & ATA_MASK_MWDMA) >> ATA_SHIFT_MWDMA; 459c6fd2807SJeff Garzik if (udma_mask) 460c6fd2807SJeff Garzik *udma_mask = (xfer_mask & ATA_MASK_UDMA) >> ATA_SHIFT_UDMA; 461c6fd2807SJeff Garzik } 462c6fd2807SJeff Garzik 463c6fd2807SJeff Garzik static const struct ata_xfer_ent { 464c6fd2807SJeff Garzik int shift, bits; 465c6fd2807SJeff Garzik u8 base; 466c6fd2807SJeff Garzik } ata_xfer_tbl[] = { 467c6fd2807SJeff Garzik { ATA_SHIFT_PIO, ATA_BITS_PIO, XFER_PIO_0 }, 468c6fd2807SJeff Garzik { ATA_SHIFT_MWDMA, ATA_BITS_MWDMA, XFER_MW_DMA_0 }, 469c6fd2807SJeff Garzik { ATA_SHIFT_UDMA, ATA_BITS_UDMA, XFER_UDMA_0 }, 470c6fd2807SJeff Garzik { -1, }, 471c6fd2807SJeff Garzik }; 472c6fd2807SJeff Garzik 473c6fd2807SJeff Garzik /** 474c6fd2807SJeff Garzik * ata_xfer_mask2mode - Find matching XFER_* for the given xfer_mask 475c6fd2807SJeff Garzik * @xfer_mask: xfer_mask of interest 476c6fd2807SJeff Garzik * 477c6fd2807SJeff Garzik * Return matching XFER_* value for @xfer_mask. Only the highest 478c6fd2807SJeff Garzik * bit of @xfer_mask is considered. 479c6fd2807SJeff Garzik * 480c6fd2807SJeff Garzik * LOCKING: 481c6fd2807SJeff Garzik * None. 482c6fd2807SJeff Garzik * 483c6fd2807SJeff Garzik * RETURNS: 484c6fd2807SJeff Garzik * Matching XFER_* value, 0 if no match found. 485c6fd2807SJeff Garzik */ 486c6fd2807SJeff Garzik static u8 ata_xfer_mask2mode(unsigned int xfer_mask) 487c6fd2807SJeff Garzik { 488c6fd2807SJeff Garzik int highbit = fls(xfer_mask) - 1; 489c6fd2807SJeff Garzik const struct ata_xfer_ent *ent; 490c6fd2807SJeff Garzik 491c6fd2807SJeff Garzik for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) 492c6fd2807SJeff Garzik if (highbit >= ent->shift && highbit < ent->shift + ent->bits) 493c6fd2807SJeff Garzik return ent->base + highbit - ent->shift; 494c6fd2807SJeff Garzik return 0; 495c6fd2807SJeff Garzik } 496c6fd2807SJeff Garzik 497c6fd2807SJeff Garzik /** 498c6fd2807SJeff Garzik * ata_xfer_mode2mask - Find matching xfer_mask for XFER_* 499c6fd2807SJeff Garzik * @xfer_mode: XFER_* of interest 500c6fd2807SJeff Garzik * 501c6fd2807SJeff Garzik * Return matching xfer_mask for @xfer_mode. 502c6fd2807SJeff Garzik * 503c6fd2807SJeff Garzik * LOCKING: 504c6fd2807SJeff Garzik * None. 505c6fd2807SJeff Garzik * 506c6fd2807SJeff Garzik * RETURNS: 507c6fd2807SJeff Garzik * Matching xfer_mask, 0 if no match found. 508c6fd2807SJeff Garzik */ 509c6fd2807SJeff Garzik static unsigned int ata_xfer_mode2mask(u8 xfer_mode) 510c6fd2807SJeff Garzik { 511c6fd2807SJeff Garzik const struct ata_xfer_ent *ent; 512c6fd2807SJeff Garzik 513c6fd2807SJeff Garzik for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) 514c6fd2807SJeff Garzik if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits) 515c6fd2807SJeff Garzik return 1 << (ent->shift + xfer_mode - ent->base); 516c6fd2807SJeff Garzik return 0; 517c6fd2807SJeff Garzik } 518c6fd2807SJeff Garzik 519c6fd2807SJeff Garzik /** 520c6fd2807SJeff Garzik * ata_xfer_mode2shift - Find matching xfer_shift for XFER_* 521c6fd2807SJeff Garzik * @xfer_mode: XFER_* of interest 522c6fd2807SJeff Garzik * 523c6fd2807SJeff Garzik * Return matching xfer_shift for @xfer_mode. 524c6fd2807SJeff Garzik * 525c6fd2807SJeff Garzik * LOCKING: 526c6fd2807SJeff Garzik * None. 527c6fd2807SJeff Garzik * 528c6fd2807SJeff Garzik * RETURNS: 529c6fd2807SJeff Garzik * Matching xfer_shift, -1 if no match found. 530c6fd2807SJeff Garzik */ 531c6fd2807SJeff Garzik static int ata_xfer_mode2shift(unsigned int xfer_mode) 532c6fd2807SJeff Garzik { 533c6fd2807SJeff Garzik const struct ata_xfer_ent *ent; 534c6fd2807SJeff Garzik 535c6fd2807SJeff Garzik for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) 536c6fd2807SJeff Garzik if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits) 537c6fd2807SJeff Garzik return ent->shift; 538c6fd2807SJeff Garzik return -1; 539c6fd2807SJeff Garzik } 540c6fd2807SJeff Garzik 541c6fd2807SJeff Garzik /** 542c6fd2807SJeff Garzik * ata_mode_string - convert xfer_mask to string 543c6fd2807SJeff Garzik * @xfer_mask: mask of bits supported; only highest bit counts. 544c6fd2807SJeff Garzik * 545c6fd2807SJeff Garzik * Determine string which represents the highest speed 546c6fd2807SJeff Garzik * (highest bit in @modemask). 547c6fd2807SJeff Garzik * 548c6fd2807SJeff Garzik * LOCKING: 549c6fd2807SJeff Garzik * None. 550c6fd2807SJeff Garzik * 551c6fd2807SJeff Garzik * RETURNS: 552c6fd2807SJeff Garzik * Constant C string representing highest speed listed in 553c6fd2807SJeff Garzik * @mode_mask, or the constant C string "<n/a>". 554c6fd2807SJeff Garzik */ 555c6fd2807SJeff Garzik static const char *ata_mode_string(unsigned int xfer_mask) 556c6fd2807SJeff Garzik { 557c6fd2807SJeff Garzik static const char * const xfer_mode_str[] = { 558c6fd2807SJeff Garzik "PIO0", 559c6fd2807SJeff Garzik "PIO1", 560c6fd2807SJeff Garzik "PIO2", 561c6fd2807SJeff Garzik "PIO3", 562c6fd2807SJeff Garzik "PIO4", 563b352e57dSAlan Cox "PIO5", 564b352e57dSAlan Cox "PIO6", 565c6fd2807SJeff Garzik "MWDMA0", 566c6fd2807SJeff Garzik "MWDMA1", 567c6fd2807SJeff Garzik "MWDMA2", 568b352e57dSAlan Cox "MWDMA3", 569b352e57dSAlan Cox "MWDMA4", 570c6fd2807SJeff Garzik "UDMA/16", 571c6fd2807SJeff Garzik "UDMA/25", 572c6fd2807SJeff Garzik "UDMA/33", 573c6fd2807SJeff Garzik "UDMA/44", 574c6fd2807SJeff Garzik "UDMA/66", 575c6fd2807SJeff Garzik "UDMA/100", 576c6fd2807SJeff Garzik "UDMA/133", 577c6fd2807SJeff Garzik "UDMA7", 578c6fd2807SJeff Garzik }; 579c6fd2807SJeff Garzik int highbit; 580c6fd2807SJeff Garzik 581c6fd2807SJeff Garzik highbit = fls(xfer_mask) - 1; 582c6fd2807SJeff Garzik if (highbit >= 0 && highbit < ARRAY_SIZE(xfer_mode_str)) 583c6fd2807SJeff Garzik return xfer_mode_str[highbit]; 584c6fd2807SJeff Garzik return "<n/a>"; 585c6fd2807SJeff Garzik } 586c6fd2807SJeff Garzik 587c6fd2807SJeff Garzik static const char *sata_spd_string(unsigned int spd) 588c6fd2807SJeff Garzik { 589c6fd2807SJeff Garzik static const char * const spd_str[] = { 590c6fd2807SJeff Garzik "1.5 Gbps", 591c6fd2807SJeff Garzik "3.0 Gbps", 592c6fd2807SJeff Garzik }; 593c6fd2807SJeff Garzik 594c6fd2807SJeff Garzik if (spd == 0 || (spd - 1) >= ARRAY_SIZE(spd_str)) 595c6fd2807SJeff Garzik return "<unknown>"; 596c6fd2807SJeff Garzik return spd_str[spd - 1]; 597c6fd2807SJeff Garzik } 598c6fd2807SJeff Garzik 599c6fd2807SJeff Garzik void ata_dev_disable(struct ata_device *dev) 600c6fd2807SJeff Garzik { 601c6fd2807SJeff Garzik if (ata_dev_enabled(dev) && ata_msg_drv(dev->ap)) { 602c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_WARNING, "disabled\n"); 603*4ae72a1eSTejun Heo ata_down_xfermask_limit(dev, ATA_DNXFER_FORCE_PIO0 | 604*4ae72a1eSTejun Heo ATA_DNXFER_QUIET); 605c6fd2807SJeff Garzik dev->class++; 606c6fd2807SJeff Garzik } 607c6fd2807SJeff Garzik } 608c6fd2807SJeff Garzik 609c6fd2807SJeff Garzik /** 610c6fd2807SJeff Garzik * ata_devchk - PATA device presence detection 611c6fd2807SJeff Garzik * @ap: ATA channel to examine 612c6fd2807SJeff Garzik * @device: Device to examine (starting at zero) 613c6fd2807SJeff Garzik * 6140d5ff566STejun Heo * This technique was originally described in 6150d5ff566STejun Heo * Hale Landis's ATADRVR (www.ata-atapi.com), and 6160d5ff566STejun Heo * later found its way into the ATA/ATAPI spec. 6170d5ff566STejun Heo * 6180d5ff566STejun Heo * Write a pattern to the ATA shadow registers, 6190d5ff566STejun Heo * and if a device is present, it will respond by 6200d5ff566STejun Heo * correctly storing and echoing back the 6210d5ff566STejun Heo * ATA shadow register contents. 622c6fd2807SJeff Garzik * 623c6fd2807SJeff Garzik * LOCKING: 624c6fd2807SJeff Garzik * caller. 625c6fd2807SJeff Garzik */ 626c6fd2807SJeff Garzik 6270d5ff566STejun Heo static unsigned int ata_devchk(struct ata_port *ap, unsigned int device) 628c6fd2807SJeff Garzik { 6290d5ff566STejun Heo struct ata_ioports *ioaddr = &ap->ioaddr; 6300d5ff566STejun Heo u8 nsect, lbal; 6310d5ff566STejun Heo 6320d5ff566STejun Heo ap->ops->dev_select(ap, device); 6330d5ff566STejun Heo 6340d5ff566STejun Heo iowrite8(0x55, ioaddr->nsect_addr); 6350d5ff566STejun Heo iowrite8(0xaa, ioaddr->lbal_addr); 6360d5ff566STejun Heo 6370d5ff566STejun Heo iowrite8(0xaa, ioaddr->nsect_addr); 6380d5ff566STejun Heo iowrite8(0x55, ioaddr->lbal_addr); 6390d5ff566STejun Heo 6400d5ff566STejun Heo iowrite8(0x55, ioaddr->nsect_addr); 6410d5ff566STejun Heo iowrite8(0xaa, ioaddr->lbal_addr); 6420d5ff566STejun Heo 6430d5ff566STejun Heo nsect = ioread8(ioaddr->nsect_addr); 6440d5ff566STejun Heo lbal = ioread8(ioaddr->lbal_addr); 6450d5ff566STejun Heo 6460d5ff566STejun Heo if ((nsect == 0x55) && (lbal == 0xaa)) 6470d5ff566STejun Heo return 1; /* we found a device */ 6480d5ff566STejun Heo 6490d5ff566STejun Heo return 0; /* nothing found */ 650c6fd2807SJeff Garzik } 651c6fd2807SJeff Garzik 652c6fd2807SJeff Garzik /** 653c6fd2807SJeff Garzik * ata_dev_classify - determine device type based on ATA-spec signature 654c6fd2807SJeff Garzik * @tf: ATA taskfile register set for device to be identified 655c6fd2807SJeff Garzik * 656c6fd2807SJeff Garzik * Determine from taskfile register contents whether a device is 657c6fd2807SJeff Garzik * ATA or ATAPI, as per "Signature and persistence" section 658c6fd2807SJeff Garzik * of ATA/PI spec (volume 1, sect 5.14). 659c6fd2807SJeff Garzik * 660c6fd2807SJeff Garzik * LOCKING: 661c6fd2807SJeff Garzik * None. 662c6fd2807SJeff Garzik * 663c6fd2807SJeff Garzik * RETURNS: 664c6fd2807SJeff Garzik * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, or %ATA_DEV_UNKNOWN 665c6fd2807SJeff Garzik * the event of failure. 666c6fd2807SJeff Garzik */ 667c6fd2807SJeff Garzik 668c6fd2807SJeff Garzik unsigned int ata_dev_classify(const struct ata_taskfile *tf) 669c6fd2807SJeff Garzik { 670c6fd2807SJeff Garzik /* Apple's open source Darwin code hints that some devices only 671c6fd2807SJeff Garzik * put a proper signature into the LBA mid/high registers, 672c6fd2807SJeff Garzik * So, we only check those. It's sufficient for uniqueness. 673c6fd2807SJeff Garzik */ 674c6fd2807SJeff Garzik 675c6fd2807SJeff Garzik if (((tf->lbam == 0) && (tf->lbah == 0)) || 676c6fd2807SJeff Garzik ((tf->lbam == 0x3c) && (tf->lbah == 0xc3))) { 677c6fd2807SJeff Garzik DPRINTK("found ATA device by sig\n"); 678c6fd2807SJeff Garzik return ATA_DEV_ATA; 679c6fd2807SJeff Garzik } 680c6fd2807SJeff Garzik 681c6fd2807SJeff Garzik if (((tf->lbam == 0x14) && (tf->lbah == 0xeb)) || 682c6fd2807SJeff Garzik ((tf->lbam == 0x69) && (tf->lbah == 0x96))) { 683c6fd2807SJeff Garzik DPRINTK("found ATAPI device by sig\n"); 684c6fd2807SJeff Garzik return ATA_DEV_ATAPI; 685c6fd2807SJeff Garzik } 686c6fd2807SJeff Garzik 687c6fd2807SJeff Garzik DPRINTK("unknown device\n"); 688c6fd2807SJeff Garzik return ATA_DEV_UNKNOWN; 689c6fd2807SJeff Garzik } 690c6fd2807SJeff Garzik 691c6fd2807SJeff Garzik /** 692c6fd2807SJeff Garzik * ata_dev_try_classify - Parse returned ATA device signature 693c6fd2807SJeff Garzik * @ap: ATA channel to examine 694c6fd2807SJeff Garzik * @device: Device to examine (starting at zero) 695c6fd2807SJeff Garzik * @r_err: Value of error register on completion 696c6fd2807SJeff Garzik * 697c6fd2807SJeff Garzik * After an event -- SRST, E.D.D., or SATA COMRESET -- occurs, 698c6fd2807SJeff Garzik * an ATA/ATAPI-defined set of values is placed in the ATA 699c6fd2807SJeff Garzik * shadow registers, indicating the results of device detection 700c6fd2807SJeff Garzik * and diagnostics. 701c6fd2807SJeff Garzik * 702c6fd2807SJeff Garzik * Select the ATA device, and read the values from the ATA shadow 703c6fd2807SJeff Garzik * registers. Then parse according to the Error register value, 704c6fd2807SJeff Garzik * and the spec-defined values examined by ata_dev_classify(). 705c6fd2807SJeff Garzik * 706c6fd2807SJeff Garzik * LOCKING: 707c6fd2807SJeff Garzik * caller. 708c6fd2807SJeff Garzik * 709c6fd2807SJeff Garzik * RETURNS: 710c6fd2807SJeff Garzik * Device type - %ATA_DEV_ATA, %ATA_DEV_ATAPI or %ATA_DEV_NONE. 711c6fd2807SJeff Garzik */ 712c6fd2807SJeff Garzik 713a619f981SAkira Iguchi unsigned int 714c6fd2807SJeff Garzik ata_dev_try_classify(struct ata_port *ap, unsigned int device, u8 *r_err) 715c6fd2807SJeff Garzik { 716c6fd2807SJeff Garzik struct ata_taskfile tf; 717c6fd2807SJeff Garzik unsigned int class; 718c6fd2807SJeff Garzik u8 err; 719c6fd2807SJeff Garzik 720c6fd2807SJeff Garzik ap->ops->dev_select(ap, device); 721c6fd2807SJeff Garzik 722c6fd2807SJeff Garzik memset(&tf, 0, sizeof(tf)); 723c6fd2807SJeff Garzik 724c6fd2807SJeff Garzik ap->ops->tf_read(ap, &tf); 725c6fd2807SJeff Garzik err = tf.feature; 726c6fd2807SJeff Garzik if (r_err) 727c6fd2807SJeff Garzik *r_err = err; 728c6fd2807SJeff Garzik 72993590859SAlan Cox /* see if device passed diags: if master then continue and warn later */ 73093590859SAlan Cox if (err == 0 && device == 0) 73193590859SAlan Cox /* diagnostic fail : do nothing _YET_ */ 73293590859SAlan Cox ap->device[device].horkage |= ATA_HORKAGE_DIAGNOSTIC; 73393590859SAlan Cox else if (err == 1) 734c6fd2807SJeff Garzik /* do nothing */ ; 735c6fd2807SJeff Garzik else if ((device == 0) && (err == 0x81)) 736c6fd2807SJeff Garzik /* do nothing */ ; 737c6fd2807SJeff Garzik else 738c6fd2807SJeff Garzik return ATA_DEV_NONE; 739c6fd2807SJeff Garzik 740c6fd2807SJeff Garzik /* determine if device is ATA or ATAPI */ 741c6fd2807SJeff Garzik class = ata_dev_classify(&tf); 742c6fd2807SJeff Garzik 743c6fd2807SJeff Garzik if (class == ATA_DEV_UNKNOWN) 744c6fd2807SJeff Garzik return ATA_DEV_NONE; 745c6fd2807SJeff Garzik if ((class == ATA_DEV_ATA) && (ata_chk_status(ap) == 0)) 746c6fd2807SJeff Garzik return ATA_DEV_NONE; 747c6fd2807SJeff Garzik return class; 748c6fd2807SJeff Garzik } 749c6fd2807SJeff Garzik 750c6fd2807SJeff Garzik /** 751c6fd2807SJeff Garzik * ata_id_string - Convert IDENTIFY DEVICE page into string 752c6fd2807SJeff Garzik * @id: IDENTIFY DEVICE results we will examine 753c6fd2807SJeff Garzik * @s: string into which data is output 754c6fd2807SJeff Garzik * @ofs: offset into identify device page 755c6fd2807SJeff Garzik * @len: length of string to return. must be an even number. 756c6fd2807SJeff Garzik * 757c6fd2807SJeff Garzik * The strings in the IDENTIFY DEVICE page are broken up into 758c6fd2807SJeff Garzik * 16-bit chunks. Run through the string, and output each 759c6fd2807SJeff Garzik * 8-bit chunk linearly, regardless of platform. 760c6fd2807SJeff Garzik * 761c6fd2807SJeff Garzik * LOCKING: 762c6fd2807SJeff Garzik * caller. 763c6fd2807SJeff Garzik */ 764c6fd2807SJeff Garzik 765c6fd2807SJeff Garzik void ata_id_string(const u16 *id, unsigned char *s, 766c6fd2807SJeff Garzik unsigned int ofs, unsigned int len) 767c6fd2807SJeff Garzik { 768c6fd2807SJeff Garzik unsigned int c; 769c6fd2807SJeff Garzik 770c6fd2807SJeff Garzik while (len > 0) { 771c6fd2807SJeff Garzik c = id[ofs] >> 8; 772c6fd2807SJeff Garzik *s = c; 773c6fd2807SJeff Garzik s++; 774c6fd2807SJeff Garzik 775c6fd2807SJeff Garzik c = id[ofs] & 0xff; 776c6fd2807SJeff Garzik *s = c; 777c6fd2807SJeff Garzik s++; 778c6fd2807SJeff Garzik 779c6fd2807SJeff Garzik ofs++; 780c6fd2807SJeff Garzik len -= 2; 781c6fd2807SJeff Garzik } 782c6fd2807SJeff Garzik } 783c6fd2807SJeff Garzik 784c6fd2807SJeff Garzik /** 785c6fd2807SJeff Garzik * ata_id_c_string - Convert IDENTIFY DEVICE page into C string 786c6fd2807SJeff Garzik * @id: IDENTIFY DEVICE results we will examine 787c6fd2807SJeff Garzik * @s: string into which data is output 788c6fd2807SJeff Garzik * @ofs: offset into identify device page 789c6fd2807SJeff Garzik * @len: length of string to return. must be an odd number. 790c6fd2807SJeff Garzik * 791c6fd2807SJeff Garzik * This function is identical to ata_id_string except that it 792c6fd2807SJeff Garzik * trims trailing spaces and terminates the resulting string with 793c6fd2807SJeff Garzik * null. @len must be actual maximum length (even number) + 1. 794c6fd2807SJeff Garzik * 795c6fd2807SJeff Garzik * LOCKING: 796c6fd2807SJeff Garzik * caller. 797c6fd2807SJeff Garzik */ 798c6fd2807SJeff Garzik void ata_id_c_string(const u16 *id, unsigned char *s, 799c6fd2807SJeff Garzik unsigned int ofs, unsigned int len) 800c6fd2807SJeff Garzik { 801c6fd2807SJeff Garzik unsigned char *p; 802c6fd2807SJeff Garzik 803c6fd2807SJeff Garzik WARN_ON(!(len & 1)); 804c6fd2807SJeff Garzik 805c6fd2807SJeff Garzik ata_id_string(id, s, ofs, len - 1); 806c6fd2807SJeff Garzik 807c6fd2807SJeff Garzik p = s + strnlen(s, len - 1); 808c6fd2807SJeff Garzik while (p > s && p[-1] == ' ') 809c6fd2807SJeff Garzik p--; 810c6fd2807SJeff Garzik *p = '\0'; 811c6fd2807SJeff Garzik } 812c6fd2807SJeff Garzik 813c6fd2807SJeff Garzik static u64 ata_id_n_sectors(const u16 *id) 814c6fd2807SJeff Garzik { 815c6fd2807SJeff Garzik if (ata_id_has_lba(id)) { 816c6fd2807SJeff Garzik if (ata_id_has_lba48(id)) 817c6fd2807SJeff Garzik return ata_id_u64(id, 100); 818c6fd2807SJeff Garzik else 819c6fd2807SJeff Garzik return ata_id_u32(id, 60); 820c6fd2807SJeff Garzik } else { 821c6fd2807SJeff Garzik if (ata_id_current_chs_valid(id)) 822c6fd2807SJeff Garzik return ata_id_u32(id, 57); 823c6fd2807SJeff Garzik else 824c6fd2807SJeff Garzik return id[1] * id[3] * id[6]; 825c6fd2807SJeff Garzik } 826c6fd2807SJeff Garzik } 827c6fd2807SJeff Garzik 828c6fd2807SJeff Garzik /** 829c6fd2807SJeff Garzik * ata_noop_dev_select - Select device 0/1 on ATA bus 830c6fd2807SJeff Garzik * @ap: ATA channel to manipulate 831c6fd2807SJeff Garzik * @device: ATA device (numbered from zero) to select 832c6fd2807SJeff Garzik * 833c6fd2807SJeff Garzik * This function performs no actual function. 834c6fd2807SJeff Garzik * 835c6fd2807SJeff Garzik * May be used as the dev_select() entry in ata_port_operations. 836c6fd2807SJeff Garzik * 837c6fd2807SJeff Garzik * LOCKING: 838c6fd2807SJeff Garzik * caller. 839c6fd2807SJeff Garzik */ 840c6fd2807SJeff Garzik void ata_noop_dev_select (struct ata_port *ap, unsigned int device) 841c6fd2807SJeff Garzik { 842c6fd2807SJeff Garzik } 843c6fd2807SJeff Garzik 844c6fd2807SJeff Garzik 845c6fd2807SJeff Garzik /** 846c6fd2807SJeff Garzik * ata_std_dev_select - Select device 0/1 on ATA bus 847c6fd2807SJeff Garzik * @ap: ATA channel to manipulate 848c6fd2807SJeff Garzik * @device: ATA device (numbered from zero) to select 849c6fd2807SJeff Garzik * 850c6fd2807SJeff Garzik * Use the method defined in the ATA specification to 851c6fd2807SJeff Garzik * make either device 0, or device 1, active on the 852c6fd2807SJeff Garzik * ATA channel. Works with both PIO and MMIO. 853c6fd2807SJeff Garzik * 854c6fd2807SJeff Garzik * May be used as the dev_select() entry in ata_port_operations. 855c6fd2807SJeff Garzik * 856c6fd2807SJeff Garzik * LOCKING: 857c6fd2807SJeff Garzik * caller. 858c6fd2807SJeff Garzik */ 859c6fd2807SJeff Garzik 860c6fd2807SJeff Garzik void ata_std_dev_select (struct ata_port *ap, unsigned int device) 861c6fd2807SJeff Garzik { 862c6fd2807SJeff Garzik u8 tmp; 863c6fd2807SJeff Garzik 864c6fd2807SJeff Garzik if (device == 0) 865c6fd2807SJeff Garzik tmp = ATA_DEVICE_OBS; 866c6fd2807SJeff Garzik else 867c6fd2807SJeff Garzik tmp = ATA_DEVICE_OBS | ATA_DEV1; 868c6fd2807SJeff Garzik 8690d5ff566STejun Heo iowrite8(tmp, ap->ioaddr.device_addr); 870c6fd2807SJeff Garzik ata_pause(ap); /* needed; also flushes, for mmio */ 871c6fd2807SJeff Garzik } 872c6fd2807SJeff Garzik 873c6fd2807SJeff Garzik /** 874c6fd2807SJeff Garzik * ata_dev_select - Select device 0/1 on ATA bus 875c6fd2807SJeff Garzik * @ap: ATA channel to manipulate 876c6fd2807SJeff Garzik * @device: ATA device (numbered from zero) to select 877c6fd2807SJeff Garzik * @wait: non-zero to wait for Status register BSY bit to clear 878c6fd2807SJeff Garzik * @can_sleep: non-zero if context allows sleeping 879c6fd2807SJeff Garzik * 880c6fd2807SJeff Garzik * Use the method defined in the ATA specification to 881c6fd2807SJeff Garzik * make either device 0, or device 1, active on the 882c6fd2807SJeff Garzik * ATA channel. 883c6fd2807SJeff Garzik * 884c6fd2807SJeff Garzik * This is a high-level version of ata_std_dev_select(), 885c6fd2807SJeff Garzik * which additionally provides the services of inserting 886c6fd2807SJeff Garzik * the proper pauses and status polling, where needed. 887c6fd2807SJeff Garzik * 888c6fd2807SJeff Garzik * LOCKING: 889c6fd2807SJeff Garzik * caller. 890c6fd2807SJeff Garzik */ 891c6fd2807SJeff Garzik 892c6fd2807SJeff Garzik void ata_dev_select(struct ata_port *ap, unsigned int device, 893c6fd2807SJeff Garzik unsigned int wait, unsigned int can_sleep) 894c6fd2807SJeff Garzik { 895c6fd2807SJeff Garzik if (ata_msg_probe(ap)) 896c6fd2807SJeff Garzik ata_port_printk(ap, KERN_INFO, "ata_dev_select: ENTER, ata%u: " 897c6fd2807SJeff Garzik "device %u, wait %u\n", ap->id, device, wait); 898c6fd2807SJeff Garzik 899c6fd2807SJeff Garzik if (wait) 900c6fd2807SJeff Garzik ata_wait_idle(ap); 901c6fd2807SJeff Garzik 902c6fd2807SJeff Garzik ap->ops->dev_select(ap, device); 903c6fd2807SJeff Garzik 904c6fd2807SJeff Garzik if (wait) { 905c6fd2807SJeff Garzik if (can_sleep && ap->device[device].class == ATA_DEV_ATAPI) 906c6fd2807SJeff Garzik msleep(150); 907c6fd2807SJeff Garzik ata_wait_idle(ap); 908c6fd2807SJeff Garzik } 909c6fd2807SJeff Garzik } 910c6fd2807SJeff Garzik 911c6fd2807SJeff Garzik /** 912c6fd2807SJeff Garzik * ata_dump_id - IDENTIFY DEVICE info debugging output 913c6fd2807SJeff Garzik * @id: IDENTIFY DEVICE page to dump 914c6fd2807SJeff Garzik * 915c6fd2807SJeff Garzik * Dump selected 16-bit words from the given IDENTIFY DEVICE 916c6fd2807SJeff Garzik * page. 917c6fd2807SJeff Garzik * 918c6fd2807SJeff Garzik * LOCKING: 919c6fd2807SJeff Garzik * caller. 920c6fd2807SJeff Garzik */ 921c6fd2807SJeff Garzik 922c6fd2807SJeff Garzik static inline void ata_dump_id(const u16 *id) 923c6fd2807SJeff Garzik { 924c6fd2807SJeff Garzik DPRINTK("49==0x%04x " 925c6fd2807SJeff Garzik "53==0x%04x " 926c6fd2807SJeff Garzik "63==0x%04x " 927c6fd2807SJeff Garzik "64==0x%04x " 928c6fd2807SJeff Garzik "75==0x%04x \n", 929c6fd2807SJeff Garzik id[49], 930c6fd2807SJeff Garzik id[53], 931c6fd2807SJeff Garzik id[63], 932c6fd2807SJeff Garzik id[64], 933c6fd2807SJeff Garzik id[75]); 934c6fd2807SJeff Garzik DPRINTK("80==0x%04x " 935c6fd2807SJeff Garzik "81==0x%04x " 936c6fd2807SJeff Garzik "82==0x%04x " 937c6fd2807SJeff Garzik "83==0x%04x " 938c6fd2807SJeff Garzik "84==0x%04x \n", 939c6fd2807SJeff Garzik id[80], 940c6fd2807SJeff Garzik id[81], 941c6fd2807SJeff Garzik id[82], 942c6fd2807SJeff Garzik id[83], 943c6fd2807SJeff Garzik id[84]); 944c6fd2807SJeff Garzik DPRINTK("88==0x%04x " 945c6fd2807SJeff Garzik "93==0x%04x\n", 946c6fd2807SJeff Garzik id[88], 947c6fd2807SJeff Garzik id[93]); 948c6fd2807SJeff Garzik } 949c6fd2807SJeff Garzik 950c6fd2807SJeff Garzik /** 951c6fd2807SJeff Garzik * ata_id_xfermask - Compute xfermask from the given IDENTIFY data 952c6fd2807SJeff Garzik * @id: IDENTIFY data to compute xfer mask from 953c6fd2807SJeff Garzik * 954c6fd2807SJeff Garzik * Compute the xfermask for this device. This is not as trivial 955c6fd2807SJeff Garzik * as it seems if we must consider early devices correctly. 956c6fd2807SJeff Garzik * 957c6fd2807SJeff Garzik * FIXME: pre IDE drive timing (do we care ?). 958c6fd2807SJeff Garzik * 959c6fd2807SJeff Garzik * LOCKING: 960c6fd2807SJeff Garzik * None. 961c6fd2807SJeff Garzik * 962c6fd2807SJeff Garzik * RETURNS: 963c6fd2807SJeff Garzik * Computed xfermask 964c6fd2807SJeff Garzik */ 965c6fd2807SJeff Garzik static unsigned int ata_id_xfermask(const u16 *id) 966c6fd2807SJeff Garzik { 967c6fd2807SJeff Garzik unsigned int pio_mask, mwdma_mask, udma_mask; 968c6fd2807SJeff Garzik 969c6fd2807SJeff Garzik /* Usual case. Word 53 indicates word 64 is valid */ 970c6fd2807SJeff Garzik if (id[ATA_ID_FIELD_VALID] & (1 << 1)) { 971c6fd2807SJeff Garzik pio_mask = id[ATA_ID_PIO_MODES] & 0x03; 972c6fd2807SJeff Garzik pio_mask <<= 3; 973c6fd2807SJeff Garzik pio_mask |= 0x7; 974c6fd2807SJeff Garzik } else { 975c6fd2807SJeff Garzik /* If word 64 isn't valid then Word 51 high byte holds 976c6fd2807SJeff Garzik * the PIO timing number for the maximum. Turn it into 977c6fd2807SJeff Garzik * a mask. 978c6fd2807SJeff Garzik */ 9797a0f1c8aSLennert Buytenhek u8 mode = (id[ATA_ID_OLD_PIO_MODES] >> 8) & 0xFF; 98046767aebSAlan Cox if (mode < 5) /* Valid PIO range */ 98146767aebSAlan Cox pio_mask = (2 << mode) - 1; 98246767aebSAlan Cox else 98346767aebSAlan Cox pio_mask = 1; 984c6fd2807SJeff Garzik 985c6fd2807SJeff Garzik /* But wait.. there's more. Design your standards by 986c6fd2807SJeff Garzik * committee and you too can get a free iordy field to 987c6fd2807SJeff Garzik * process. However its the speeds not the modes that 988c6fd2807SJeff Garzik * are supported... Note drivers using the timing API 989c6fd2807SJeff Garzik * will get this right anyway 990c6fd2807SJeff Garzik */ 991c6fd2807SJeff Garzik } 992c6fd2807SJeff Garzik 993c6fd2807SJeff Garzik mwdma_mask = id[ATA_ID_MWDMA_MODES] & 0x07; 994c6fd2807SJeff Garzik 995b352e57dSAlan Cox if (ata_id_is_cfa(id)) { 996b352e57dSAlan Cox /* 997b352e57dSAlan Cox * Process compact flash extended modes 998b352e57dSAlan Cox */ 999b352e57dSAlan Cox int pio = id[163] & 0x7; 1000b352e57dSAlan Cox int dma = (id[163] >> 3) & 7; 1001b352e57dSAlan Cox 1002b352e57dSAlan Cox if (pio) 1003b352e57dSAlan Cox pio_mask |= (1 << 5); 1004b352e57dSAlan Cox if (pio > 1) 1005b352e57dSAlan Cox pio_mask |= (1 << 6); 1006b352e57dSAlan Cox if (dma) 1007b352e57dSAlan Cox mwdma_mask |= (1 << 3); 1008b352e57dSAlan Cox if (dma > 1) 1009b352e57dSAlan Cox mwdma_mask |= (1 << 4); 1010b352e57dSAlan Cox } 1011b352e57dSAlan Cox 1012c6fd2807SJeff Garzik udma_mask = 0; 1013c6fd2807SJeff Garzik if (id[ATA_ID_FIELD_VALID] & (1 << 2)) 1014c6fd2807SJeff Garzik udma_mask = id[ATA_ID_UDMA_MODES] & 0xff; 1015c6fd2807SJeff Garzik 1016c6fd2807SJeff Garzik return ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask); 1017c6fd2807SJeff Garzik } 1018c6fd2807SJeff Garzik 1019c6fd2807SJeff Garzik /** 1020c6fd2807SJeff Garzik * ata_port_queue_task - Queue port_task 1021c6fd2807SJeff Garzik * @ap: The ata_port to queue port_task for 1022c6fd2807SJeff Garzik * @fn: workqueue function to be scheduled 102365f27f38SDavid Howells * @data: data for @fn to use 1024c6fd2807SJeff Garzik * @delay: delay time for workqueue function 1025c6fd2807SJeff Garzik * 1026c6fd2807SJeff Garzik * Schedule @fn(@data) for execution after @delay jiffies using 1027c6fd2807SJeff Garzik * port_task. There is one port_task per port and it's the 1028c6fd2807SJeff Garzik * user(low level driver)'s responsibility to make sure that only 1029c6fd2807SJeff Garzik * one task is active at any given time. 1030c6fd2807SJeff Garzik * 1031c6fd2807SJeff Garzik * libata core layer takes care of synchronization between 1032c6fd2807SJeff Garzik * port_task and EH. ata_port_queue_task() may be ignored for EH 1033c6fd2807SJeff Garzik * synchronization. 1034c6fd2807SJeff Garzik * 1035c6fd2807SJeff Garzik * LOCKING: 1036c6fd2807SJeff Garzik * Inherited from caller. 1037c6fd2807SJeff Garzik */ 103865f27f38SDavid Howells void ata_port_queue_task(struct ata_port *ap, work_func_t fn, void *data, 1039c6fd2807SJeff Garzik unsigned long delay) 1040c6fd2807SJeff Garzik { 1041c6fd2807SJeff Garzik int rc; 1042c6fd2807SJeff Garzik 1043c6fd2807SJeff Garzik if (ap->pflags & ATA_PFLAG_FLUSH_PORT_TASK) 1044c6fd2807SJeff Garzik return; 1045c6fd2807SJeff Garzik 104665f27f38SDavid Howells PREPARE_DELAYED_WORK(&ap->port_task, fn); 104765f27f38SDavid Howells ap->port_task_data = data; 1048c6fd2807SJeff Garzik 1049c6fd2807SJeff Garzik rc = queue_delayed_work(ata_wq, &ap->port_task, delay); 1050c6fd2807SJeff Garzik 1051c6fd2807SJeff Garzik /* rc == 0 means that another user is using port task */ 1052c6fd2807SJeff Garzik WARN_ON(rc == 0); 1053c6fd2807SJeff Garzik } 1054c6fd2807SJeff Garzik 1055c6fd2807SJeff Garzik /** 1056c6fd2807SJeff Garzik * ata_port_flush_task - Flush port_task 1057c6fd2807SJeff Garzik * @ap: The ata_port to flush port_task for 1058c6fd2807SJeff Garzik * 1059c6fd2807SJeff Garzik * After this function completes, port_task is guranteed not to 1060c6fd2807SJeff Garzik * be running or scheduled. 1061c6fd2807SJeff Garzik * 1062c6fd2807SJeff Garzik * LOCKING: 1063c6fd2807SJeff Garzik * Kernel thread context (may sleep) 1064c6fd2807SJeff Garzik */ 1065c6fd2807SJeff Garzik void ata_port_flush_task(struct ata_port *ap) 1066c6fd2807SJeff Garzik { 1067c6fd2807SJeff Garzik unsigned long flags; 1068c6fd2807SJeff Garzik 1069c6fd2807SJeff Garzik DPRINTK("ENTER\n"); 1070c6fd2807SJeff Garzik 1071c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 1072c6fd2807SJeff Garzik ap->pflags |= ATA_PFLAG_FLUSH_PORT_TASK; 1073c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 1074c6fd2807SJeff Garzik 1075c6fd2807SJeff Garzik DPRINTK("flush #1\n"); 1076c6fd2807SJeff Garzik flush_workqueue(ata_wq); 1077c6fd2807SJeff Garzik 1078c6fd2807SJeff Garzik /* 1079c6fd2807SJeff Garzik * At this point, if a task is running, it's guaranteed to see 1080c6fd2807SJeff Garzik * the FLUSH flag; thus, it will never queue pio tasks again. 1081c6fd2807SJeff Garzik * Cancel and flush. 1082c6fd2807SJeff Garzik */ 1083c6fd2807SJeff Garzik if (!cancel_delayed_work(&ap->port_task)) { 1084c6fd2807SJeff Garzik if (ata_msg_ctl(ap)) 1085c6fd2807SJeff Garzik ata_port_printk(ap, KERN_DEBUG, "%s: flush #2\n", 1086c6fd2807SJeff Garzik __FUNCTION__); 1087c6fd2807SJeff Garzik flush_workqueue(ata_wq); 1088c6fd2807SJeff Garzik } 1089c6fd2807SJeff Garzik 1090c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 1091c6fd2807SJeff Garzik ap->pflags &= ~ATA_PFLAG_FLUSH_PORT_TASK; 1092c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 1093c6fd2807SJeff Garzik 1094c6fd2807SJeff Garzik if (ata_msg_ctl(ap)) 1095c6fd2807SJeff Garzik ata_port_printk(ap, KERN_DEBUG, "%s: EXIT\n", __FUNCTION__); 1096c6fd2807SJeff Garzik } 1097c6fd2807SJeff Garzik 10987102d230SAdrian Bunk static void ata_qc_complete_internal(struct ata_queued_cmd *qc) 1099c6fd2807SJeff Garzik { 1100c6fd2807SJeff Garzik struct completion *waiting = qc->private_data; 1101c6fd2807SJeff Garzik 1102c6fd2807SJeff Garzik complete(waiting); 1103c6fd2807SJeff Garzik } 1104c6fd2807SJeff Garzik 1105c6fd2807SJeff Garzik /** 11062432697bSTejun Heo * ata_exec_internal_sg - execute libata internal command 1107c6fd2807SJeff Garzik * @dev: Device to which the command is sent 1108c6fd2807SJeff Garzik * @tf: Taskfile registers for the command and the result 1109c6fd2807SJeff Garzik * @cdb: CDB for packet command 1110c6fd2807SJeff Garzik * @dma_dir: Data tranfer direction of the command 11112432697bSTejun Heo * @sg: sg list for the data buffer of the command 11122432697bSTejun Heo * @n_elem: Number of sg entries 1113c6fd2807SJeff Garzik * 1114c6fd2807SJeff Garzik * Executes libata internal command with timeout. @tf contains 1115c6fd2807SJeff Garzik * command on entry and result on return. Timeout and error 1116c6fd2807SJeff Garzik * conditions are reported via return value. No recovery action 1117c6fd2807SJeff Garzik * is taken after a command times out. It's caller's duty to 1118c6fd2807SJeff Garzik * clean up after timeout. 1119c6fd2807SJeff Garzik * 1120c6fd2807SJeff Garzik * LOCKING: 1121c6fd2807SJeff Garzik * None. Should be called with kernel context, might sleep. 1122c6fd2807SJeff Garzik * 1123c6fd2807SJeff Garzik * RETURNS: 1124c6fd2807SJeff Garzik * Zero on success, AC_ERR_* mask on failure 1125c6fd2807SJeff Garzik */ 11262432697bSTejun Heo unsigned ata_exec_internal_sg(struct ata_device *dev, 1127c6fd2807SJeff Garzik struct ata_taskfile *tf, const u8 *cdb, 11282432697bSTejun Heo int dma_dir, struct scatterlist *sg, 11292432697bSTejun Heo unsigned int n_elem) 1130c6fd2807SJeff Garzik { 1131c6fd2807SJeff Garzik struct ata_port *ap = dev->ap; 1132c6fd2807SJeff Garzik u8 command = tf->command; 1133c6fd2807SJeff Garzik struct ata_queued_cmd *qc; 1134c6fd2807SJeff Garzik unsigned int tag, preempted_tag; 1135c6fd2807SJeff Garzik u32 preempted_sactive, preempted_qc_active; 1136c6fd2807SJeff Garzik DECLARE_COMPLETION_ONSTACK(wait); 1137c6fd2807SJeff Garzik unsigned long flags; 1138c6fd2807SJeff Garzik unsigned int err_mask; 1139c6fd2807SJeff Garzik int rc; 1140c6fd2807SJeff Garzik 1141c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 1142c6fd2807SJeff Garzik 1143c6fd2807SJeff Garzik /* no internal command while frozen */ 1144c6fd2807SJeff Garzik if (ap->pflags & ATA_PFLAG_FROZEN) { 1145c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 1146c6fd2807SJeff Garzik return AC_ERR_SYSTEM; 1147c6fd2807SJeff Garzik } 1148c6fd2807SJeff Garzik 1149c6fd2807SJeff Garzik /* initialize internal qc */ 1150c6fd2807SJeff Garzik 1151c6fd2807SJeff Garzik /* XXX: Tag 0 is used for drivers with legacy EH as some 1152c6fd2807SJeff Garzik * drivers choke if any other tag is given. This breaks 1153c6fd2807SJeff Garzik * ata_tag_internal() test for those drivers. Don't use new 1154c6fd2807SJeff Garzik * EH stuff without converting to it. 1155c6fd2807SJeff Garzik */ 1156c6fd2807SJeff Garzik if (ap->ops->error_handler) 1157c6fd2807SJeff Garzik tag = ATA_TAG_INTERNAL; 1158c6fd2807SJeff Garzik else 1159c6fd2807SJeff Garzik tag = 0; 1160c6fd2807SJeff Garzik 1161c6fd2807SJeff Garzik if (test_and_set_bit(tag, &ap->qc_allocated)) 1162c6fd2807SJeff Garzik BUG(); 1163c6fd2807SJeff Garzik qc = __ata_qc_from_tag(ap, tag); 1164c6fd2807SJeff Garzik 1165c6fd2807SJeff Garzik qc->tag = tag; 1166c6fd2807SJeff Garzik qc->scsicmd = NULL; 1167c6fd2807SJeff Garzik qc->ap = ap; 1168c6fd2807SJeff Garzik qc->dev = dev; 1169c6fd2807SJeff Garzik ata_qc_reinit(qc); 1170c6fd2807SJeff Garzik 1171c6fd2807SJeff Garzik preempted_tag = ap->active_tag; 1172c6fd2807SJeff Garzik preempted_sactive = ap->sactive; 1173c6fd2807SJeff Garzik preempted_qc_active = ap->qc_active; 1174c6fd2807SJeff Garzik ap->active_tag = ATA_TAG_POISON; 1175c6fd2807SJeff Garzik ap->sactive = 0; 1176c6fd2807SJeff Garzik ap->qc_active = 0; 1177c6fd2807SJeff Garzik 1178c6fd2807SJeff Garzik /* prepare & issue qc */ 1179c6fd2807SJeff Garzik qc->tf = *tf; 1180c6fd2807SJeff Garzik if (cdb) 1181c6fd2807SJeff Garzik memcpy(qc->cdb, cdb, ATAPI_CDB_LEN); 1182c6fd2807SJeff Garzik qc->flags |= ATA_QCFLAG_RESULT_TF; 1183c6fd2807SJeff Garzik qc->dma_dir = dma_dir; 1184c6fd2807SJeff Garzik if (dma_dir != DMA_NONE) { 11852432697bSTejun Heo unsigned int i, buflen = 0; 11862432697bSTejun Heo 11872432697bSTejun Heo for (i = 0; i < n_elem; i++) 11882432697bSTejun Heo buflen += sg[i].length; 11892432697bSTejun Heo 11902432697bSTejun Heo ata_sg_init(qc, sg, n_elem); 119149c80429SBrian King qc->nbytes = buflen; 1192c6fd2807SJeff Garzik } 1193c6fd2807SJeff Garzik 1194c6fd2807SJeff Garzik qc->private_data = &wait; 1195c6fd2807SJeff Garzik qc->complete_fn = ata_qc_complete_internal; 1196c6fd2807SJeff Garzik 1197c6fd2807SJeff Garzik ata_qc_issue(qc); 1198c6fd2807SJeff Garzik 1199c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 1200c6fd2807SJeff Garzik 1201c6fd2807SJeff Garzik rc = wait_for_completion_timeout(&wait, ata_probe_timeout); 1202c6fd2807SJeff Garzik 1203c6fd2807SJeff Garzik ata_port_flush_task(ap); 1204c6fd2807SJeff Garzik 1205c6fd2807SJeff Garzik if (!rc) { 1206c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 1207c6fd2807SJeff Garzik 1208c6fd2807SJeff Garzik /* We're racing with irq here. If we lose, the 1209c6fd2807SJeff Garzik * following test prevents us from completing the qc 1210c6fd2807SJeff Garzik * twice. If we win, the port is frozen and will be 1211c6fd2807SJeff Garzik * cleaned up by ->post_internal_cmd(). 1212c6fd2807SJeff Garzik */ 1213c6fd2807SJeff Garzik if (qc->flags & ATA_QCFLAG_ACTIVE) { 1214c6fd2807SJeff Garzik qc->err_mask |= AC_ERR_TIMEOUT; 1215c6fd2807SJeff Garzik 1216c6fd2807SJeff Garzik if (ap->ops->error_handler) 1217c6fd2807SJeff Garzik ata_port_freeze(ap); 1218c6fd2807SJeff Garzik else 1219c6fd2807SJeff Garzik ata_qc_complete(qc); 1220c6fd2807SJeff Garzik 1221c6fd2807SJeff Garzik if (ata_msg_warn(ap)) 1222c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_WARNING, 1223c6fd2807SJeff Garzik "qc timeout (cmd 0x%x)\n", command); 1224c6fd2807SJeff Garzik } 1225c6fd2807SJeff Garzik 1226c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 1227c6fd2807SJeff Garzik } 1228c6fd2807SJeff Garzik 1229c6fd2807SJeff Garzik /* do post_internal_cmd */ 1230c6fd2807SJeff Garzik if (ap->ops->post_internal_cmd) 1231c6fd2807SJeff Garzik ap->ops->post_internal_cmd(qc); 1232c6fd2807SJeff Garzik 123318d90debSAlan if ((qc->flags & ATA_QCFLAG_FAILED) && !qc->err_mask) { 1234c6fd2807SJeff Garzik if (ata_msg_warn(ap)) 1235c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_WARNING, 1236c6fd2807SJeff Garzik "zero err_mask for failed " 1237c6fd2807SJeff Garzik "internal command, assuming AC_ERR_OTHER\n"); 1238c6fd2807SJeff Garzik qc->err_mask |= AC_ERR_OTHER; 1239c6fd2807SJeff Garzik } 1240c6fd2807SJeff Garzik 1241c6fd2807SJeff Garzik /* finish up */ 1242c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 1243c6fd2807SJeff Garzik 1244c6fd2807SJeff Garzik *tf = qc->result_tf; 1245c6fd2807SJeff Garzik err_mask = qc->err_mask; 1246c6fd2807SJeff Garzik 1247c6fd2807SJeff Garzik ata_qc_free(qc); 1248c6fd2807SJeff Garzik ap->active_tag = preempted_tag; 1249c6fd2807SJeff Garzik ap->sactive = preempted_sactive; 1250c6fd2807SJeff Garzik ap->qc_active = preempted_qc_active; 1251c6fd2807SJeff Garzik 1252c6fd2807SJeff Garzik /* XXX - Some LLDDs (sata_mv) disable port on command failure. 1253c6fd2807SJeff Garzik * Until those drivers are fixed, we detect the condition 1254c6fd2807SJeff Garzik * here, fail the command with AC_ERR_SYSTEM and reenable the 1255c6fd2807SJeff Garzik * port. 1256c6fd2807SJeff Garzik * 1257c6fd2807SJeff Garzik * Note that this doesn't change any behavior as internal 1258c6fd2807SJeff Garzik * command failure results in disabling the device in the 1259c6fd2807SJeff Garzik * higher layer for LLDDs without new reset/EH callbacks. 1260c6fd2807SJeff Garzik * 1261c6fd2807SJeff Garzik * Kill the following code as soon as those drivers are fixed. 1262c6fd2807SJeff Garzik */ 1263c6fd2807SJeff Garzik if (ap->flags & ATA_FLAG_DISABLED) { 1264c6fd2807SJeff Garzik err_mask |= AC_ERR_SYSTEM; 1265c6fd2807SJeff Garzik ata_port_probe(ap); 1266c6fd2807SJeff Garzik } 1267c6fd2807SJeff Garzik 1268c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 1269c6fd2807SJeff Garzik 1270c6fd2807SJeff Garzik return err_mask; 1271c6fd2807SJeff Garzik } 1272c6fd2807SJeff Garzik 1273c6fd2807SJeff Garzik /** 127433480a0eSTejun Heo * ata_exec_internal - execute libata internal command 12752432697bSTejun Heo * @dev: Device to which the command is sent 12762432697bSTejun Heo * @tf: Taskfile registers for the command and the result 12772432697bSTejun Heo * @cdb: CDB for packet command 12782432697bSTejun Heo * @dma_dir: Data tranfer direction of the command 12792432697bSTejun Heo * @buf: Data buffer of the command 12802432697bSTejun Heo * @buflen: Length of data buffer 12812432697bSTejun Heo * 12822432697bSTejun Heo * Wrapper around ata_exec_internal_sg() which takes simple 12832432697bSTejun Heo * buffer instead of sg list. 12842432697bSTejun Heo * 12852432697bSTejun Heo * LOCKING: 12862432697bSTejun Heo * None. Should be called with kernel context, might sleep. 12872432697bSTejun Heo * 12882432697bSTejun Heo * RETURNS: 12892432697bSTejun Heo * Zero on success, AC_ERR_* mask on failure 12902432697bSTejun Heo */ 12912432697bSTejun Heo unsigned ata_exec_internal(struct ata_device *dev, 12922432697bSTejun Heo struct ata_taskfile *tf, const u8 *cdb, 12932432697bSTejun Heo int dma_dir, void *buf, unsigned int buflen) 12942432697bSTejun Heo { 129533480a0eSTejun Heo struct scatterlist *psg = NULL, sg; 129633480a0eSTejun Heo unsigned int n_elem = 0; 12972432697bSTejun Heo 129833480a0eSTejun Heo if (dma_dir != DMA_NONE) { 129933480a0eSTejun Heo WARN_ON(!buf); 13002432697bSTejun Heo sg_init_one(&sg, buf, buflen); 130133480a0eSTejun Heo psg = &sg; 130233480a0eSTejun Heo n_elem++; 130333480a0eSTejun Heo } 13042432697bSTejun Heo 130533480a0eSTejun Heo return ata_exec_internal_sg(dev, tf, cdb, dma_dir, psg, n_elem); 13062432697bSTejun Heo } 13072432697bSTejun Heo 13082432697bSTejun Heo /** 1309c6fd2807SJeff Garzik * ata_do_simple_cmd - execute simple internal command 1310c6fd2807SJeff Garzik * @dev: Device to which the command is sent 1311c6fd2807SJeff Garzik * @cmd: Opcode to execute 1312c6fd2807SJeff Garzik * 1313c6fd2807SJeff Garzik * Execute a 'simple' command, that only consists of the opcode 1314c6fd2807SJeff Garzik * 'cmd' itself, without filling any other registers 1315c6fd2807SJeff Garzik * 1316c6fd2807SJeff Garzik * LOCKING: 1317c6fd2807SJeff Garzik * Kernel thread context (may sleep). 1318c6fd2807SJeff Garzik * 1319c6fd2807SJeff Garzik * RETURNS: 1320c6fd2807SJeff Garzik * Zero on success, AC_ERR_* mask on failure 1321c6fd2807SJeff Garzik */ 1322c6fd2807SJeff Garzik unsigned int ata_do_simple_cmd(struct ata_device *dev, u8 cmd) 1323c6fd2807SJeff Garzik { 1324c6fd2807SJeff Garzik struct ata_taskfile tf; 1325c6fd2807SJeff Garzik 1326c6fd2807SJeff Garzik ata_tf_init(dev, &tf); 1327c6fd2807SJeff Garzik 1328c6fd2807SJeff Garzik tf.command = cmd; 1329c6fd2807SJeff Garzik tf.flags |= ATA_TFLAG_DEVICE; 1330c6fd2807SJeff Garzik tf.protocol = ATA_PROT_NODATA; 1331c6fd2807SJeff Garzik 1332c6fd2807SJeff Garzik return ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0); 1333c6fd2807SJeff Garzik } 1334c6fd2807SJeff Garzik 1335c6fd2807SJeff Garzik /** 1336c6fd2807SJeff Garzik * ata_pio_need_iordy - check if iordy needed 1337c6fd2807SJeff Garzik * @adev: ATA device 1338c6fd2807SJeff Garzik * 1339c6fd2807SJeff Garzik * Check if the current speed of the device requires IORDY. Used 1340c6fd2807SJeff Garzik * by various controllers for chip configuration. 1341c6fd2807SJeff Garzik */ 1342c6fd2807SJeff Garzik 1343c6fd2807SJeff Garzik unsigned int ata_pio_need_iordy(const struct ata_device *adev) 1344c6fd2807SJeff Garzik { 1345c6fd2807SJeff Garzik int pio; 1346c6fd2807SJeff Garzik int speed = adev->pio_mode - XFER_PIO_0; 1347c6fd2807SJeff Garzik 1348c6fd2807SJeff Garzik if (speed < 2) 1349c6fd2807SJeff Garzik return 0; 1350c6fd2807SJeff Garzik if (speed > 2) 1351c6fd2807SJeff Garzik return 1; 1352c6fd2807SJeff Garzik 1353c6fd2807SJeff Garzik /* If we have no drive specific rule, then PIO 2 is non IORDY */ 1354c6fd2807SJeff Garzik 1355c6fd2807SJeff Garzik if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE */ 1356c6fd2807SJeff Garzik pio = adev->id[ATA_ID_EIDE_PIO]; 1357c6fd2807SJeff Garzik /* Is the speed faster than the drive allows non IORDY ? */ 1358c6fd2807SJeff Garzik if (pio) { 1359c6fd2807SJeff Garzik /* This is cycle times not frequency - watch the logic! */ 1360c6fd2807SJeff Garzik if (pio > 240) /* PIO2 is 240nS per cycle */ 1361c6fd2807SJeff Garzik return 1; 1362c6fd2807SJeff Garzik return 0; 1363c6fd2807SJeff Garzik } 1364c6fd2807SJeff Garzik } 1365c6fd2807SJeff Garzik return 0; 1366c6fd2807SJeff Garzik } 1367c6fd2807SJeff Garzik 1368c6fd2807SJeff Garzik /** 1369c6fd2807SJeff Garzik * ata_dev_read_id - Read ID data from the specified device 1370c6fd2807SJeff Garzik * @dev: target device 1371c6fd2807SJeff Garzik * @p_class: pointer to class of the target device (may be changed) 1372bff04647STejun Heo * @flags: ATA_READID_* flags 1373c6fd2807SJeff Garzik * @id: buffer to read IDENTIFY data into 1374c6fd2807SJeff Garzik * 1375c6fd2807SJeff Garzik * Read ID data from the specified device. ATA_CMD_ID_ATA is 1376c6fd2807SJeff Garzik * performed on ATA devices and ATA_CMD_ID_ATAPI on ATAPI 1377c6fd2807SJeff Garzik * devices. This function also issues ATA_CMD_INIT_DEV_PARAMS 1378c6fd2807SJeff Garzik * for pre-ATA4 drives. 1379c6fd2807SJeff Garzik * 1380c6fd2807SJeff Garzik * LOCKING: 1381c6fd2807SJeff Garzik * Kernel thread context (may sleep) 1382c6fd2807SJeff Garzik * 1383c6fd2807SJeff Garzik * RETURNS: 1384c6fd2807SJeff Garzik * 0 on success, -errno otherwise. 1385c6fd2807SJeff Garzik */ 1386c6fd2807SJeff Garzik int ata_dev_read_id(struct ata_device *dev, unsigned int *p_class, 1387bff04647STejun Heo unsigned int flags, u16 *id) 1388c6fd2807SJeff Garzik { 1389c6fd2807SJeff Garzik struct ata_port *ap = dev->ap; 1390c6fd2807SJeff Garzik unsigned int class = *p_class; 1391c6fd2807SJeff Garzik struct ata_taskfile tf; 1392c6fd2807SJeff Garzik unsigned int err_mask = 0; 1393c6fd2807SJeff Garzik const char *reason; 1394c6fd2807SJeff Garzik int rc; 1395c6fd2807SJeff Garzik 1396c6fd2807SJeff Garzik if (ata_msg_ctl(ap)) 1397c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_DEBUG, "%s: ENTER, host %u, dev %u\n", 1398c6fd2807SJeff Garzik __FUNCTION__, ap->id, dev->devno); 1399c6fd2807SJeff Garzik 1400c6fd2807SJeff Garzik ata_dev_select(ap, dev->devno, 1, 1); /* select device 0/1 */ 1401c6fd2807SJeff Garzik 1402c6fd2807SJeff Garzik retry: 1403c6fd2807SJeff Garzik ata_tf_init(dev, &tf); 1404c6fd2807SJeff Garzik 1405c6fd2807SJeff Garzik switch (class) { 1406c6fd2807SJeff Garzik case ATA_DEV_ATA: 1407c6fd2807SJeff Garzik tf.command = ATA_CMD_ID_ATA; 1408c6fd2807SJeff Garzik break; 1409c6fd2807SJeff Garzik case ATA_DEV_ATAPI: 1410c6fd2807SJeff Garzik tf.command = ATA_CMD_ID_ATAPI; 1411c6fd2807SJeff Garzik break; 1412c6fd2807SJeff Garzik default: 1413c6fd2807SJeff Garzik rc = -ENODEV; 1414c6fd2807SJeff Garzik reason = "unsupported class"; 1415c6fd2807SJeff Garzik goto err_out; 1416c6fd2807SJeff Garzik } 1417c6fd2807SJeff Garzik 1418c6fd2807SJeff Garzik tf.protocol = ATA_PROT_PIO; 141981afe893STejun Heo 142081afe893STejun Heo /* Some devices choke if TF registers contain garbage. Make 142181afe893STejun Heo * sure those are properly initialized. 142281afe893STejun Heo */ 142381afe893STejun Heo tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 142481afe893STejun Heo 142581afe893STejun Heo /* Device presence detection is unreliable on some 142681afe893STejun Heo * controllers. Always poll IDENTIFY if available. 142781afe893STejun Heo */ 142881afe893STejun Heo tf.flags |= ATA_TFLAG_POLLING; 1429c6fd2807SJeff Garzik 1430c6fd2807SJeff Garzik err_mask = ata_exec_internal(dev, &tf, NULL, DMA_FROM_DEVICE, 1431c6fd2807SJeff Garzik id, sizeof(id[0]) * ATA_ID_WORDS); 1432c6fd2807SJeff Garzik if (err_mask) { 1433800b3996STejun Heo if (err_mask & AC_ERR_NODEV_HINT) { 143455a8e2c8STejun Heo DPRINTK("ata%u.%d: NODEV after polling detection\n", 143555a8e2c8STejun Heo ap->id, dev->devno); 143655a8e2c8STejun Heo return -ENOENT; 143755a8e2c8STejun Heo } 143855a8e2c8STejun Heo 1439c6fd2807SJeff Garzik rc = -EIO; 1440c6fd2807SJeff Garzik reason = "I/O error"; 1441c6fd2807SJeff Garzik goto err_out; 1442c6fd2807SJeff Garzik } 1443c6fd2807SJeff Garzik 1444c6fd2807SJeff Garzik swap_buf_le16(id, ATA_ID_WORDS); 1445c6fd2807SJeff Garzik 1446c6fd2807SJeff Garzik /* sanity check */ 1447c6fd2807SJeff Garzik rc = -EINVAL; 1448c6fd2807SJeff Garzik reason = "device reports illegal type"; 14494a3381feSJeff Garzik 14504a3381feSJeff Garzik if (class == ATA_DEV_ATA) { 14514a3381feSJeff Garzik if (!ata_id_is_ata(id) && !ata_id_is_cfa(id)) 14524a3381feSJeff Garzik goto err_out; 14534a3381feSJeff Garzik } else { 14544a3381feSJeff Garzik if (ata_id_is_ata(id)) 1455c6fd2807SJeff Garzik goto err_out; 1456c6fd2807SJeff Garzik } 1457c6fd2807SJeff Garzik 1458bff04647STejun Heo if ((flags & ATA_READID_POSTRESET) && class == ATA_DEV_ATA) { 1459c6fd2807SJeff Garzik /* 1460c6fd2807SJeff Garzik * The exact sequence expected by certain pre-ATA4 drives is: 1461c6fd2807SJeff Garzik * SRST RESET 1462c6fd2807SJeff Garzik * IDENTIFY 1463c6fd2807SJeff Garzik * INITIALIZE DEVICE PARAMETERS 1464c6fd2807SJeff Garzik * anything else.. 1465c6fd2807SJeff Garzik * Some drives were very specific about that exact sequence. 1466c6fd2807SJeff Garzik */ 1467c6fd2807SJeff Garzik if (ata_id_major_version(id) < 4 || !ata_id_has_lba(id)) { 1468c6fd2807SJeff Garzik err_mask = ata_dev_init_params(dev, id[3], id[6]); 1469c6fd2807SJeff Garzik if (err_mask) { 1470c6fd2807SJeff Garzik rc = -EIO; 1471c6fd2807SJeff Garzik reason = "INIT_DEV_PARAMS failed"; 1472c6fd2807SJeff Garzik goto err_out; 1473c6fd2807SJeff Garzik } 1474c6fd2807SJeff Garzik 1475c6fd2807SJeff Garzik /* current CHS translation info (id[53-58]) might be 1476c6fd2807SJeff Garzik * changed. reread the identify device info. 1477c6fd2807SJeff Garzik */ 1478bff04647STejun Heo flags &= ~ATA_READID_POSTRESET; 1479c6fd2807SJeff Garzik goto retry; 1480c6fd2807SJeff Garzik } 1481c6fd2807SJeff Garzik } 1482c6fd2807SJeff Garzik 1483c6fd2807SJeff Garzik *p_class = class; 1484c6fd2807SJeff Garzik 1485c6fd2807SJeff Garzik return 0; 1486c6fd2807SJeff Garzik 1487c6fd2807SJeff Garzik err_out: 1488c6fd2807SJeff Garzik if (ata_msg_warn(ap)) 1489c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_WARNING, "failed to IDENTIFY " 1490c6fd2807SJeff Garzik "(%s, err_mask=0x%x)\n", reason, err_mask); 1491c6fd2807SJeff Garzik return rc; 1492c6fd2807SJeff Garzik } 1493c6fd2807SJeff Garzik 1494c6fd2807SJeff Garzik static inline u8 ata_dev_knobble(struct ata_device *dev) 1495c6fd2807SJeff Garzik { 1496c6fd2807SJeff Garzik return ((dev->ap->cbl == ATA_CBL_SATA) && (!ata_id_is_sata(dev->id))); 1497c6fd2807SJeff Garzik } 1498c6fd2807SJeff Garzik 1499c6fd2807SJeff Garzik static void ata_dev_config_ncq(struct ata_device *dev, 1500c6fd2807SJeff Garzik char *desc, size_t desc_sz) 1501c6fd2807SJeff Garzik { 1502c6fd2807SJeff Garzik struct ata_port *ap = dev->ap; 1503c6fd2807SJeff Garzik int hdepth = 0, ddepth = ata_id_queue_depth(dev->id); 1504c6fd2807SJeff Garzik 1505c6fd2807SJeff Garzik if (!ata_id_has_ncq(dev->id)) { 1506c6fd2807SJeff Garzik desc[0] = '\0'; 1507c6fd2807SJeff Garzik return; 1508c6fd2807SJeff Garzik } 15096919a0a6SAlan Cox if (ata_device_blacklisted(dev) & ATA_HORKAGE_NONCQ) { 15106919a0a6SAlan Cox snprintf(desc, desc_sz, "NCQ (not used)"); 15116919a0a6SAlan Cox return; 15126919a0a6SAlan Cox } 1513c6fd2807SJeff Garzik if (ap->flags & ATA_FLAG_NCQ) { 1514cca3974eSJeff Garzik hdepth = min(ap->scsi_host->can_queue, ATA_MAX_QUEUE - 1); 1515c6fd2807SJeff Garzik dev->flags |= ATA_DFLAG_NCQ; 1516c6fd2807SJeff Garzik } 1517c6fd2807SJeff Garzik 1518c6fd2807SJeff Garzik if (hdepth >= ddepth) 1519c6fd2807SJeff Garzik snprintf(desc, desc_sz, "NCQ (depth %d)", ddepth); 1520c6fd2807SJeff Garzik else 1521c6fd2807SJeff Garzik snprintf(desc, desc_sz, "NCQ (depth %d/%d)", hdepth, ddepth); 1522c6fd2807SJeff Garzik } 1523c6fd2807SJeff Garzik 1524c6fd2807SJeff Garzik static void ata_set_port_max_cmd_len(struct ata_port *ap) 1525c6fd2807SJeff Garzik { 1526c6fd2807SJeff Garzik int i; 1527c6fd2807SJeff Garzik 1528cca3974eSJeff Garzik if (ap->scsi_host) { 1529cca3974eSJeff Garzik unsigned int len = 0; 1530cca3974eSJeff Garzik 1531c6fd2807SJeff Garzik for (i = 0; i < ATA_MAX_DEVICES; i++) 1532cca3974eSJeff Garzik len = max(len, ap->device[i].cdb_len); 1533cca3974eSJeff Garzik 1534cca3974eSJeff Garzik ap->scsi_host->max_cmd_len = len; 1535c6fd2807SJeff Garzik } 1536c6fd2807SJeff Garzik } 1537c6fd2807SJeff Garzik 1538c6fd2807SJeff Garzik /** 1539c6fd2807SJeff Garzik * ata_dev_configure - Configure the specified ATA/ATAPI device 1540c6fd2807SJeff Garzik * @dev: Target device to configure 1541c6fd2807SJeff Garzik * 1542c6fd2807SJeff Garzik * Configure @dev according to @dev->id. Generic and low-level 1543c6fd2807SJeff Garzik * driver specific fixups are also applied. 1544c6fd2807SJeff Garzik * 1545c6fd2807SJeff Garzik * LOCKING: 1546c6fd2807SJeff Garzik * Kernel thread context (may sleep) 1547c6fd2807SJeff Garzik * 1548c6fd2807SJeff Garzik * RETURNS: 1549c6fd2807SJeff Garzik * 0 on success, -errno otherwise 1550c6fd2807SJeff Garzik */ 1551efdaedc4STejun Heo int ata_dev_configure(struct ata_device *dev) 1552c6fd2807SJeff Garzik { 1553c6fd2807SJeff Garzik struct ata_port *ap = dev->ap; 1554efdaedc4STejun Heo int print_info = ap->eh_context.i.flags & ATA_EHI_PRINTINFO; 1555c6fd2807SJeff Garzik const u16 *id = dev->id; 1556c6fd2807SJeff Garzik unsigned int xfer_mask; 1557b352e57dSAlan Cox char revbuf[7]; /* XYZ-99\0 */ 15583f64f565SEric D. Mudama char fwrevbuf[ATA_ID_FW_REV_LEN+1]; 15593f64f565SEric D. Mudama char modelbuf[ATA_ID_PROD_LEN+1]; 1560c6fd2807SJeff Garzik int rc; 1561c6fd2807SJeff Garzik 1562c6fd2807SJeff Garzik if (!ata_dev_enabled(dev) && ata_msg_info(ap)) { 1563c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_INFO, 1564c6fd2807SJeff Garzik "%s: ENTER/EXIT (host %u, dev %u) -- nodev\n", 1565c6fd2807SJeff Garzik __FUNCTION__, ap->id, dev->devno); 1566c6fd2807SJeff Garzik return 0; 1567c6fd2807SJeff Garzik } 1568c6fd2807SJeff Garzik 1569c6fd2807SJeff Garzik if (ata_msg_probe(ap)) 1570c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_DEBUG, "%s: ENTER, host %u, dev %u\n", 1571c6fd2807SJeff Garzik __FUNCTION__, ap->id, dev->devno); 1572c6fd2807SJeff Garzik 157308573a86SKristen Carlson Accardi /* set _SDD */ 157408573a86SKristen Carlson Accardi rc = ata_acpi_push_id(ap, dev->devno); 157508573a86SKristen Carlson Accardi if (rc) { 157608573a86SKristen Carlson Accardi ata_dev_printk(dev, KERN_WARNING, "failed to set _SDD(%d)\n", 157708573a86SKristen Carlson Accardi rc); 157808573a86SKristen Carlson Accardi } 157908573a86SKristen Carlson Accardi 158008573a86SKristen Carlson Accardi /* retrieve and execute the ATA task file of _GTF */ 158108573a86SKristen Carlson Accardi ata_acpi_exec_tfs(ap); 158208573a86SKristen Carlson Accardi 1583c6fd2807SJeff Garzik /* print device capabilities */ 1584c6fd2807SJeff Garzik if (ata_msg_probe(ap)) 1585c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_DEBUG, 1586c6fd2807SJeff Garzik "%s: cfg 49:%04x 82:%04x 83:%04x 84:%04x " 1587c6fd2807SJeff Garzik "85:%04x 86:%04x 87:%04x 88:%04x\n", 1588c6fd2807SJeff Garzik __FUNCTION__, 1589c6fd2807SJeff Garzik id[49], id[82], id[83], id[84], 1590c6fd2807SJeff Garzik id[85], id[86], id[87], id[88]); 1591c6fd2807SJeff Garzik 1592c6fd2807SJeff Garzik /* initialize to-be-configured parameters */ 1593c6fd2807SJeff Garzik dev->flags &= ~ATA_DFLAG_CFG_MASK; 1594c6fd2807SJeff Garzik dev->max_sectors = 0; 1595c6fd2807SJeff Garzik dev->cdb_len = 0; 1596c6fd2807SJeff Garzik dev->n_sectors = 0; 1597c6fd2807SJeff Garzik dev->cylinders = 0; 1598c6fd2807SJeff Garzik dev->heads = 0; 1599c6fd2807SJeff Garzik dev->sectors = 0; 1600c6fd2807SJeff Garzik 1601c6fd2807SJeff Garzik /* 1602c6fd2807SJeff Garzik * common ATA, ATAPI feature tests 1603c6fd2807SJeff Garzik */ 1604c6fd2807SJeff Garzik 1605c6fd2807SJeff Garzik /* find max transfer mode; for printk only */ 1606c6fd2807SJeff Garzik xfer_mask = ata_id_xfermask(id); 1607c6fd2807SJeff Garzik 1608c6fd2807SJeff Garzik if (ata_msg_probe(ap)) 1609c6fd2807SJeff Garzik ata_dump_id(id); 1610c6fd2807SJeff Garzik 1611c6fd2807SJeff Garzik /* ATA-specific feature tests */ 1612c6fd2807SJeff Garzik if (dev->class == ATA_DEV_ATA) { 1613b352e57dSAlan Cox if (ata_id_is_cfa(id)) { 1614b352e57dSAlan Cox if (id[162] & 1) /* CPRM may make this media unusable */ 1615b352e57dSAlan Cox ata_dev_printk(dev, KERN_WARNING, "ata%u: device %u supports DRM functions and may not be fully accessable.\n", 1616b352e57dSAlan Cox ap->id, dev->devno); 1617b352e57dSAlan Cox snprintf(revbuf, 7, "CFA"); 1618b352e57dSAlan Cox } 1619b352e57dSAlan Cox else 1620b352e57dSAlan Cox snprintf(revbuf, 7, "ATA-%d", ata_id_major_version(id)); 1621b352e57dSAlan Cox 1622c6fd2807SJeff Garzik dev->n_sectors = ata_id_n_sectors(id); 1623c6fd2807SJeff Garzik 16243f64f565SEric D. Mudama /* SCSI only uses 4-char revisions, dump full 8 chars from ATA */ 1625591a6e8eSJeff Garzik ata_id_c_string(dev->id, fwrevbuf, ATA_ID_FW_REV, 16263f64f565SEric D. Mudama sizeof(fwrevbuf)); 16273f64f565SEric D. Mudama 1628591a6e8eSJeff Garzik ata_id_c_string(dev->id, modelbuf, ATA_ID_PROD, 16293f64f565SEric D. Mudama sizeof(modelbuf)); 16303f64f565SEric D. Mudama 16313f64f565SEric D. Mudama if (dev->id[59] & 0x100) 16323f64f565SEric D. Mudama dev->multi_count = dev->id[59] & 0xff; 16333f64f565SEric D. Mudama 1634c6fd2807SJeff Garzik if (ata_id_has_lba(id)) { 1635c6fd2807SJeff Garzik const char *lba_desc; 1636c6fd2807SJeff Garzik char ncq_desc[20]; 1637c6fd2807SJeff Garzik 1638c6fd2807SJeff Garzik lba_desc = "LBA"; 1639c6fd2807SJeff Garzik dev->flags |= ATA_DFLAG_LBA; 1640c6fd2807SJeff Garzik if (ata_id_has_lba48(id)) { 1641c6fd2807SJeff Garzik dev->flags |= ATA_DFLAG_LBA48; 1642c6fd2807SJeff Garzik lba_desc = "LBA48"; 16436fc49adbSTejun Heo 16446fc49adbSTejun Heo if (dev->n_sectors >= (1UL << 28) && 16456fc49adbSTejun Heo ata_id_has_flush_ext(id)) 16466fc49adbSTejun Heo dev->flags |= ATA_DFLAG_FLUSH_EXT; 1647c6fd2807SJeff Garzik } 1648c6fd2807SJeff Garzik 1649c6fd2807SJeff Garzik /* config NCQ */ 1650c6fd2807SJeff Garzik ata_dev_config_ncq(dev, ncq_desc, sizeof(ncq_desc)); 1651c6fd2807SJeff Garzik 1652c6fd2807SJeff Garzik /* print device info to dmesg */ 16533f64f565SEric D. Mudama if (ata_msg_drv(ap) && print_info) { 16543f64f565SEric D. Mudama ata_dev_printk(dev, KERN_INFO, 16553f64f565SEric D. Mudama "%s: %s, %s, max %s\n", 16563f64f565SEric D. Mudama revbuf, modelbuf, fwrevbuf, 16573f64f565SEric D. Mudama ata_mode_string(xfer_mask)); 16583f64f565SEric D. Mudama ata_dev_printk(dev, KERN_INFO, 16593f64f565SEric D. Mudama "%Lu sectors, multi %u: %s %s\n", 1660c6fd2807SJeff Garzik (unsigned long long)dev->n_sectors, 16613f64f565SEric D. Mudama dev->multi_count, lba_desc, ncq_desc); 16623f64f565SEric D. Mudama } 1663c6fd2807SJeff Garzik } else { 1664c6fd2807SJeff Garzik /* CHS */ 1665c6fd2807SJeff Garzik 1666c6fd2807SJeff Garzik /* Default translation */ 1667c6fd2807SJeff Garzik dev->cylinders = id[1]; 1668c6fd2807SJeff Garzik dev->heads = id[3]; 1669c6fd2807SJeff Garzik dev->sectors = id[6]; 1670c6fd2807SJeff Garzik 1671c6fd2807SJeff Garzik if (ata_id_current_chs_valid(id)) { 1672c6fd2807SJeff Garzik /* Current CHS translation is valid. */ 1673c6fd2807SJeff Garzik dev->cylinders = id[54]; 1674c6fd2807SJeff Garzik dev->heads = id[55]; 1675c6fd2807SJeff Garzik dev->sectors = id[56]; 1676c6fd2807SJeff Garzik } 1677c6fd2807SJeff Garzik 1678c6fd2807SJeff Garzik /* print device info to dmesg */ 16793f64f565SEric D. Mudama if (ata_msg_drv(ap) && print_info) { 1680c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_INFO, 16813f64f565SEric D. Mudama "%s: %s, %s, max %s\n", 16823f64f565SEric D. Mudama revbuf, modelbuf, fwrevbuf, 16833f64f565SEric D. Mudama ata_mode_string(xfer_mask)); 16843f64f565SEric D. Mudama ata_dev_printk(dev, KERN_INFO, 16853f64f565SEric D. Mudama "%Lu sectors, multi %u, CHS %u/%u/%u\n", 16863f64f565SEric D. Mudama (unsigned long long)dev->n_sectors, 16873f64f565SEric D. Mudama dev->multi_count, dev->cylinders, 16883f64f565SEric D. Mudama dev->heads, dev->sectors); 16893f64f565SEric D. Mudama } 1690c6fd2807SJeff Garzik } 1691c6fd2807SJeff Garzik 1692c6fd2807SJeff Garzik dev->cdb_len = 16; 1693c6fd2807SJeff Garzik } 1694c6fd2807SJeff Garzik 1695c6fd2807SJeff Garzik /* ATAPI-specific feature tests */ 1696c6fd2807SJeff Garzik else if (dev->class == ATA_DEV_ATAPI) { 1697c6fd2807SJeff Garzik char *cdb_intr_string = ""; 1698c6fd2807SJeff Garzik 1699c6fd2807SJeff Garzik rc = atapi_cdb_len(id); 1700c6fd2807SJeff Garzik if ((rc < 12) || (rc > ATAPI_CDB_LEN)) { 1701c6fd2807SJeff Garzik if (ata_msg_warn(ap)) 1702c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_WARNING, 1703c6fd2807SJeff Garzik "unsupported CDB len\n"); 1704c6fd2807SJeff Garzik rc = -EINVAL; 1705c6fd2807SJeff Garzik goto err_out_nosup; 1706c6fd2807SJeff Garzik } 1707c6fd2807SJeff Garzik dev->cdb_len = (unsigned int) rc; 1708c6fd2807SJeff Garzik 1709c6fd2807SJeff Garzik if (ata_id_cdb_intr(dev->id)) { 1710c6fd2807SJeff Garzik dev->flags |= ATA_DFLAG_CDB_INTR; 1711c6fd2807SJeff Garzik cdb_intr_string = ", CDB intr"; 1712c6fd2807SJeff Garzik } 1713c6fd2807SJeff Garzik 1714c6fd2807SJeff Garzik /* print device info to dmesg */ 1715c6fd2807SJeff Garzik if (ata_msg_drv(ap) && print_info) 1716c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_INFO, "ATAPI, max %s%s\n", 1717c6fd2807SJeff Garzik ata_mode_string(xfer_mask), 1718c6fd2807SJeff Garzik cdb_intr_string); 1719c6fd2807SJeff Garzik } 1720c6fd2807SJeff Garzik 1721914ed354STejun Heo /* determine max_sectors */ 1722914ed354STejun Heo dev->max_sectors = ATA_MAX_SECTORS; 1723914ed354STejun Heo if (dev->flags & ATA_DFLAG_LBA48) 1724914ed354STejun Heo dev->max_sectors = ATA_MAX_SECTORS_LBA48; 1725914ed354STejun Heo 172693590859SAlan Cox if (dev->horkage & ATA_HORKAGE_DIAGNOSTIC) { 172793590859SAlan Cox /* Let the user know. We don't want to disallow opens for 172893590859SAlan Cox rescue purposes, or in case the vendor is just a blithering 172993590859SAlan Cox idiot */ 173093590859SAlan Cox if (print_info) { 173193590859SAlan Cox ata_dev_printk(dev, KERN_WARNING, 173293590859SAlan Cox "Drive reports diagnostics failure. This may indicate a drive\n"); 173393590859SAlan Cox ata_dev_printk(dev, KERN_WARNING, 173493590859SAlan Cox "fault or invalid emulation. Contact drive vendor for information.\n"); 173593590859SAlan Cox } 173693590859SAlan Cox } 173793590859SAlan Cox 1738c6fd2807SJeff Garzik ata_set_port_max_cmd_len(ap); 1739c6fd2807SJeff Garzik 1740c6fd2807SJeff Garzik /* limit bridge transfers to udma5, 200 sectors */ 1741c6fd2807SJeff Garzik if (ata_dev_knobble(dev)) { 1742c6fd2807SJeff Garzik if (ata_msg_drv(ap) && print_info) 1743c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_INFO, 1744c6fd2807SJeff Garzik "applying bridge limits\n"); 1745c6fd2807SJeff Garzik dev->udma_mask &= ATA_UDMA5; 1746c6fd2807SJeff Garzik dev->max_sectors = ATA_MAX_SECTORS; 1747c6fd2807SJeff Garzik } 1748c6fd2807SJeff Garzik 1749c6fd2807SJeff Garzik if (ap->ops->dev_config) 1750c6fd2807SJeff Garzik ap->ops->dev_config(ap, dev); 1751c6fd2807SJeff Garzik 1752c6fd2807SJeff Garzik if (ata_msg_probe(ap)) 1753c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_DEBUG, "%s: EXIT, drv_stat = 0x%x\n", 1754c6fd2807SJeff Garzik __FUNCTION__, ata_chk_status(ap)); 1755c6fd2807SJeff Garzik return 0; 1756c6fd2807SJeff Garzik 1757c6fd2807SJeff Garzik err_out_nosup: 1758c6fd2807SJeff Garzik if (ata_msg_probe(ap)) 1759c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_DEBUG, 1760c6fd2807SJeff Garzik "%s: EXIT, err\n", __FUNCTION__); 1761c6fd2807SJeff Garzik return rc; 1762c6fd2807SJeff Garzik } 1763c6fd2807SJeff Garzik 1764c6fd2807SJeff Garzik /** 1765c6fd2807SJeff Garzik * ata_bus_probe - Reset and probe ATA bus 1766c6fd2807SJeff Garzik * @ap: Bus to probe 1767c6fd2807SJeff Garzik * 1768c6fd2807SJeff Garzik * Master ATA bus probing function. Initiates a hardware-dependent 1769c6fd2807SJeff Garzik * bus reset, then attempts to identify any devices found on 1770c6fd2807SJeff Garzik * the bus. 1771c6fd2807SJeff Garzik * 1772c6fd2807SJeff Garzik * LOCKING: 1773c6fd2807SJeff Garzik * PCI/etc. bus probe sem. 1774c6fd2807SJeff Garzik * 1775c6fd2807SJeff Garzik * RETURNS: 1776c6fd2807SJeff Garzik * Zero on success, negative errno otherwise. 1777c6fd2807SJeff Garzik */ 1778c6fd2807SJeff Garzik 1779c6fd2807SJeff Garzik int ata_bus_probe(struct ata_port *ap) 1780c6fd2807SJeff Garzik { 1781c6fd2807SJeff Garzik unsigned int classes[ATA_MAX_DEVICES]; 1782c6fd2807SJeff Garzik int tries[ATA_MAX_DEVICES]; 1783*4ae72a1eSTejun Heo int i, rc; 1784c6fd2807SJeff Garzik struct ata_device *dev; 1785c6fd2807SJeff Garzik 1786c6fd2807SJeff Garzik ata_port_probe(ap); 1787c6fd2807SJeff Garzik 1788c6fd2807SJeff Garzik for (i = 0; i < ATA_MAX_DEVICES; i++) 1789c6fd2807SJeff Garzik tries[i] = ATA_PROBE_MAX_TRIES; 1790c6fd2807SJeff Garzik 1791c6fd2807SJeff Garzik retry: 1792c6fd2807SJeff Garzik /* reset and determine device classes */ 1793c6fd2807SJeff Garzik ap->ops->phy_reset(ap); 1794c6fd2807SJeff Garzik 1795c6fd2807SJeff Garzik for (i = 0; i < ATA_MAX_DEVICES; i++) { 1796c6fd2807SJeff Garzik dev = &ap->device[i]; 1797c6fd2807SJeff Garzik 1798c6fd2807SJeff Garzik if (!(ap->flags & ATA_FLAG_DISABLED) && 1799c6fd2807SJeff Garzik dev->class != ATA_DEV_UNKNOWN) 1800c6fd2807SJeff Garzik classes[dev->devno] = dev->class; 1801c6fd2807SJeff Garzik else 1802c6fd2807SJeff Garzik classes[dev->devno] = ATA_DEV_NONE; 1803c6fd2807SJeff Garzik 1804c6fd2807SJeff Garzik dev->class = ATA_DEV_UNKNOWN; 1805c6fd2807SJeff Garzik } 1806c6fd2807SJeff Garzik 1807c6fd2807SJeff Garzik ata_port_probe(ap); 1808c6fd2807SJeff Garzik 1809c6fd2807SJeff Garzik /* after the reset the device state is PIO 0 and the controller 1810c6fd2807SJeff Garzik state is undefined. Record the mode */ 1811c6fd2807SJeff Garzik 1812c6fd2807SJeff Garzik for (i = 0; i < ATA_MAX_DEVICES; i++) 1813c6fd2807SJeff Garzik ap->device[i].pio_mode = XFER_PIO_0; 1814c6fd2807SJeff Garzik 1815c6fd2807SJeff Garzik /* read IDENTIFY page and configure devices */ 1816c6fd2807SJeff Garzik for (i = 0; i < ATA_MAX_DEVICES; i++) { 1817c6fd2807SJeff Garzik dev = &ap->device[i]; 1818c6fd2807SJeff Garzik 1819c6fd2807SJeff Garzik if (tries[i]) 1820c6fd2807SJeff Garzik dev->class = classes[i]; 1821c6fd2807SJeff Garzik 1822c6fd2807SJeff Garzik if (!ata_dev_enabled(dev)) 1823c6fd2807SJeff Garzik continue; 1824c6fd2807SJeff Garzik 1825bff04647STejun Heo rc = ata_dev_read_id(dev, &dev->class, ATA_READID_POSTRESET, 1826bff04647STejun Heo dev->id); 1827c6fd2807SJeff Garzik if (rc) 1828c6fd2807SJeff Garzik goto fail; 1829c6fd2807SJeff Garzik 1830efdaedc4STejun Heo ap->eh_context.i.flags |= ATA_EHI_PRINTINFO; 1831efdaedc4STejun Heo rc = ata_dev_configure(dev); 1832efdaedc4STejun Heo ap->eh_context.i.flags &= ~ATA_EHI_PRINTINFO; 1833c6fd2807SJeff Garzik if (rc) 1834c6fd2807SJeff Garzik goto fail; 1835c6fd2807SJeff Garzik } 1836c6fd2807SJeff Garzik 1837c6fd2807SJeff Garzik /* configure transfer mode */ 1838c6fd2807SJeff Garzik rc = ata_set_mode(ap, &dev); 1839*4ae72a1eSTejun Heo if (rc) 1840c6fd2807SJeff Garzik goto fail; 1841c6fd2807SJeff Garzik 1842c6fd2807SJeff Garzik for (i = 0; i < ATA_MAX_DEVICES; i++) 1843c6fd2807SJeff Garzik if (ata_dev_enabled(&ap->device[i])) 1844c6fd2807SJeff Garzik return 0; 1845c6fd2807SJeff Garzik 1846c6fd2807SJeff Garzik /* no device present, disable port */ 1847c6fd2807SJeff Garzik ata_port_disable(ap); 1848c6fd2807SJeff Garzik ap->ops->port_disable(ap); 1849c6fd2807SJeff Garzik return -ENODEV; 1850c6fd2807SJeff Garzik 1851c6fd2807SJeff Garzik fail: 1852*4ae72a1eSTejun Heo tries[dev->devno]--; 1853*4ae72a1eSTejun Heo 1854c6fd2807SJeff Garzik switch (rc) { 1855c6fd2807SJeff Garzik case -EINVAL: 1856*4ae72a1eSTejun Heo /* eeek, something went very wrong, give up */ 1857c6fd2807SJeff Garzik tries[dev->devno] = 0; 1858c6fd2807SJeff Garzik break; 1859*4ae72a1eSTejun Heo 1860*4ae72a1eSTejun Heo case -ENODEV: 1861*4ae72a1eSTejun Heo /* give it just one more chance */ 1862*4ae72a1eSTejun Heo tries[dev->devno] = min(tries[dev->devno], 1); 1863c6fd2807SJeff Garzik case -EIO: 1864*4ae72a1eSTejun Heo if (tries[dev->devno] == 1) { 1865*4ae72a1eSTejun Heo /* This is the last chance, better to slow 1866*4ae72a1eSTejun Heo * down than lose it. 1867*4ae72a1eSTejun Heo */ 1868c6fd2807SJeff Garzik sata_down_spd_limit(ap); 1869*4ae72a1eSTejun Heo ata_down_xfermask_limit(dev, ATA_DNXFER_PIO); 1870*4ae72a1eSTejun Heo } 1871c6fd2807SJeff Garzik } 1872c6fd2807SJeff Garzik 1873*4ae72a1eSTejun Heo if (!tries[dev->devno]) 1874c6fd2807SJeff Garzik ata_dev_disable(dev); 1875c6fd2807SJeff Garzik 1876c6fd2807SJeff Garzik goto retry; 1877c6fd2807SJeff Garzik } 1878c6fd2807SJeff Garzik 1879c6fd2807SJeff Garzik /** 1880c6fd2807SJeff Garzik * ata_port_probe - Mark port as enabled 1881c6fd2807SJeff Garzik * @ap: Port for which we indicate enablement 1882c6fd2807SJeff Garzik * 1883c6fd2807SJeff Garzik * Modify @ap data structure such that the system 1884c6fd2807SJeff Garzik * thinks that the entire port is enabled. 1885c6fd2807SJeff Garzik * 1886cca3974eSJeff Garzik * LOCKING: host lock, or some other form of 1887c6fd2807SJeff Garzik * serialization. 1888c6fd2807SJeff Garzik */ 1889c6fd2807SJeff Garzik 1890c6fd2807SJeff Garzik void ata_port_probe(struct ata_port *ap) 1891c6fd2807SJeff Garzik { 1892c6fd2807SJeff Garzik ap->flags &= ~ATA_FLAG_DISABLED; 1893c6fd2807SJeff Garzik } 1894c6fd2807SJeff Garzik 1895c6fd2807SJeff Garzik /** 1896c6fd2807SJeff Garzik * sata_print_link_status - Print SATA link status 1897c6fd2807SJeff Garzik * @ap: SATA port to printk link status about 1898c6fd2807SJeff Garzik * 1899c6fd2807SJeff Garzik * This function prints link speed and status of a SATA link. 1900c6fd2807SJeff Garzik * 1901c6fd2807SJeff Garzik * LOCKING: 1902c6fd2807SJeff Garzik * None. 1903c6fd2807SJeff Garzik */ 1904c6fd2807SJeff Garzik static void sata_print_link_status(struct ata_port *ap) 1905c6fd2807SJeff Garzik { 1906c6fd2807SJeff Garzik u32 sstatus, scontrol, tmp; 1907c6fd2807SJeff Garzik 1908c6fd2807SJeff Garzik if (sata_scr_read(ap, SCR_STATUS, &sstatus)) 1909c6fd2807SJeff Garzik return; 1910c6fd2807SJeff Garzik sata_scr_read(ap, SCR_CONTROL, &scontrol); 1911c6fd2807SJeff Garzik 1912c6fd2807SJeff Garzik if (ata_port_online(ap)) { 1913c6fd2807SJeff Garzik tmp = (sstatus >> 4) & 0xf; 1914c6fd2807SJeff Garzik ata_port_printk(ap, KERN_INFO, 1915c6fd2807SJeff Garzik "SATA link up %s (SStatus %X SControl %X)\n", 1916c6fd2807SJeff Garzik sata_spd_string(tmp), sstatus, scontrol); 1917c6fd2807SJeff Garzik } else { 1918c6fd2807SJeff Garzik ata_port_printk(ap, KERN_INFO, 1919c6fd2807SJeff Garzik "SATA link down (SStatus %X SControl %X)\n", 1920c6fd2807SJeff Garzik sstatus, scontrol); 1921c6fd2807SJeff Garzik } 1922c6fd2807SJeff Garzik } 1923c6fd2807SJeff Garzik 1924c6fd2807SJeff Garzik /** 1925c6fd2807SJeff Garzik * __sata_phy_reset - Wake/reset a low-level SATA PHY 1926c6fd2807SJeff Garzik * @ap: SATA port associated with target SATA PHY. 1927c6fd2807SJeff Garzik * 1928c6fd2807SJeff Garzik * This function issues commands to standard SATA Sxxx 1929c6fd2807SJeff Garzik * PHY registers, to wake up the phy (and device), and 1930c6fd2807SJeff Garzik * clear any reset condition. 1931c6fd2807SJeff Garzik * 1932c6fd2807SJeff Garzik * LOCKING: 1933c6fd2807SJeff Garzik * PCI/etc. bus probe sem. 1934c6fd2807SJeff Garzik * 1935c6fd2807SJeff Garzik */ 1936c6fd2807SJeff Garzik void __sata_phy_reset(struct ata_port *ap) 1937c6fd2807SJeff Garzik { 1938c6fd2807SJeff Garzik u32 sstatus; 1939c6fd2807SJeff Garzik unsigned long timeout = jiffies + (HZ * 5); 1940c6fd2807SJeff Garzik 1941c6fd2807SJeff Garzik if (ap->flags & ATA_FLAG_SATA_RESET) { 1942c6fd2807SJeff Garzik /* issue phy wake/reset */ 1943c6fd2807SJeff Garzik sata_scr_write_flush(ap, SCR_CONTROL, 0x301); 1944c6fd2807SJeff Garzik /* Couldn't find anything in SATA I/II specs, but 1945c6fd2807SJeff Garzik * AHCI-1.1 10.4.2 says at least 1 ms. */ 1946c6fd2807SJeff Garzik mdelay(1); 1947c6fd2807SJeff Garzik } 1948c6fd2807SJeff Garzik /* phy wake/clear reset */ 1949c6fd2807SJeff Garzik sata_scr_write_flush(ap, SCR_CONTROL, 0x300); 1950c6fd2807SJeff Garzik 1951c6fd2807SJeff Garzik /* wait for phy to become ready, if necessary */ 1952c6fd2807SJeff Garzik do { 1953c6fd2807SJeff Garzik msleep(200); 1954c6fd2807SJeff Garzik sata_scr_read(ap, SCR_STATUS, &sstatus); 1955c6fd2807SJeff Garzik if ((sstatus & 0xf) != 1) 1956c6fd2807SJeff Garzik break; 1957c6fd2807SJeff Garzik } while (time_before(jiffies, timeout)); 1958c6fd2807SJeff Garzik 1959c6fd2807SJeff Garzik /* print link status */ 1960c6fd2807SJeff Garzik sata_print_link_status(ap); 1961c6fd2807SJeff Garzik 1962c6fd2807SJeff Garzik /* TODO: phy layer with polling, timeouts, etc. */ 1963c6fd2807SJeff Garzik if (!ata_port_offline(ap)) 1964c6fd2807SJeff Garzik ata_port_probe(ap); 1965c6fd2807SJeff Garzik else 1966c6fd2807SJeff Garzik ata_port_disable(ap); 1967c6fd2807SJeff Garzik 1968c6fd2807SJeff Garzik if (ap->flags & ATA_FLAG_DISABLED) 1969c6fd2807SJeff Garzik return; 1970c6fd2807SJeff Garzik 1971c6fd2807SJeff Garzik if (ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT)) { 1972c6fd2807SJeff Garzik ata_port_disable(ap); 1973c6fd2807SJeff Garzik return; 1974c6fd2807SJeff Garzik } 1975c6fd2807SJeff Garzik 1976c6fd2807SJeff Garzik ap->cbl = ATA_CBL_SATA; 1977c6fd2807SJeff Garzik } 1978c6fd2807SJeff Garzik 1979c6fd2807SJeff Garzik /** 1980c6fd2807SJeff Garzik * sata_phy_reset - Reset SATA bus. 1981c6fd2807SJeff Garzik * @ap: SATA port associated with target SATA PHY. 1982c6fd2807SJeff Garzik * 1983c6fd2807SJeff Garzik * This function resets the SATA bus, and then probes 1984c6fd2807SJeff Garzik * the bus for devices. 1985c6fd2807SJeff Garzik * 1986c6fd2807SJeff Garzik * LOCKING: 1987c6fd2807SJeff Garzik * PCI/etc. bus probe sem. 1988c6fd2807SJeff Garzik * 1989c6fd2807SJeff Garzik */ 1990c6fd2807SJeff Garzik void sata_phy_reset(struct ata_port *ap) 1991c6fd2807SJeff Garzik { 1992c6fd2807SJeff Garzik __sata_phy_reset(ap); 1993c6fd2807SJeff Garzik if (ap->flags & ATA_FLAG_DISABLED) 1994c6fd2807SJeff Garzik return; 1995c6fd2807SJeff Garzik ata_bus_reset(ap); 1996c6fd2807SJeff Garzik } 1997c6fd2807SJeff Garzik 1998c6fd2807SJeff Garzik /** 1999c6fd2807SJeff Garzik * ata_dev_pair - return other device on cable 2000c6fd2807SJeff Garzik * @adev: device 2001c6fd2807SJeff Garzik * 2002c6fd2807SJeff Garzik * Obtain the other device on the same cable, or if none is 2003c6fd2807SJeff Garzik * present NULL is returned 2004c6fd2807SJeff Garzik */ 2005c6fd2807SJeff Garzik 2006c6fd2807SJeff Garzik struct ata_device *ata_dev_pair(struct ata_device *adev) 2007c6fd2807SJeff Garzik { 2008c6fd2807SJeff Garzik struct ata_port *ap = adev->ap; 2009c6fd2807SJeff Garzik struct ata_device *pair = &ap->device[1 - adev->devno]; 2010c6fd2807SJeff Garzik if (!ata_dev_enabled(pair)) 2011c6fd2807SJeff Garzik return NULL; 2012c6fd2807SJeff Garzik return pair; 2013c6fd2807SJeff Garzik } 2014c6fd2807SJeff Garzik 2015c6fd2807SJeff Garzik /** 2016c6fd2807SJeff Garzik * ata_port_disable - Disable port. 2017c6fd2807SJeff Garzik * @ap: Port to be disabled. 2018c6fd2807SJeff Garzik * 2019c6fd2807SJeff Garzik * Modify @ap data structure such that the system 2020c6fd2807SJeff Garzik * thinks that the entire port is disabled, and should 2021c6fd2807SJeff Garzik * never attempt to probe or communicate with devices 2022c6fd2807SJeff Garzik * on this port. 2023c6fd2807SJeff Garzik * 2024cca3974eSJeff Garzik * LOCKING: host lock, or some other form of 2025c6fd2807SJeff Garzik * serialization. 2026c6fd2807SJeff Garzik */ 2027c6fd2807SJeff Garzik 2028c6fd2807SJeff Garzik void ata_port_disable(struct ata_port *ap) 2029c6fd2807SJeff Garzik { 2030c6fd2807SJeff Garzik ap->device[0].class = ATA_DEV_NONE; 2031c6fd2807SJeff Garzik ap->device[1].class = ATA_DEV_NONE; 2032c6fd2807SJeff Garzik ap->flags |= ATA_FLAG_DISABLED; 2033c6fd2807SJeff Garzik } 2034c6fd2807SJeff Garzik 2035c6fd2807SJeff Garzik /** 2036c6fd2807SJeff Garzik * sata_down_spd_limit - adjust SATA spd limit downward 2037c6fd2807SJeff Garzik * @ap: Port to adjust SATA spd limit for 2038c6fd2807SJeff Garzik * 2039c6fd2807SJeff Garzik * Adjust SATA spd limit of @ap downward. Note that this 2040c6fd2807SJeff Garzik * function only adjusts the limit. The change must be applied 2041c6fd2807SJeff Garzik * using sata_set_spd(). 2042c6fd2807SJeff Garzik * 2043c6fd2807SJeff Garzik * LOCKING: 2044c6fd2807SJeff Garzik * Inherited from caller. 2045c6fd2807SJeff Garzik * 2046c6fd2807SJeff Garzik * RETURNS: 2047c6fd2807SJeff Garzik * 0 on success, negative errno on failure 2048c6fd2807SJeff Garzik */ 2049c6fd2807SJeff Garzik int sata_down_spd_limit(struct ata_port *ap) 2050c6fd2807SJeff Garzik { 2051c6fd2807SJeff Garzik u32 sstatus, spd, mask; 2052c6fd2807SJeff Garzik int rc, highbit; 2053c6fd2807SJeff Garzik 2054c6fd2807SJeff Garzik rc = sata_scr_read(ap, SCR_STATUS, &sstatus); 2055c6fd2807SJeff Garzik if (rc) 2056c6fd2807SJeff Garzik return rc; 2057c6fd2807SJeff Garzik 2058c6fd2807SJeff Garzik mask = ap->sata_spd_limit; 2059c6fd2807SJeff Garzik if (mask <= 1) 2060c6fd2807SJeff Garzik return -EINVAL; 2061c6fd2807SJeff Garzik highbit = fls(mask) - 1; 2062c6fd2807SJeff Garzik mask &= ~(1 << highbit); 2063c6fd2807SJeff Garzik 2064c6fd2807SJeff Garzik spd = (sstatus >> 4) & 0xf; 2065c6fd2807SJeff Garzik if (spd <= 1) 2066c6fd2807SJeff Garzik return -EINVAL; 2067c6fd2807SJeff Garzik spd--; 2068c6fd2807SJeff Garzik mask &= (1 << spd) - 1; 2069c6fd2807SJeff Garzik if (!mask) 2070c6fd2807SJeff Garzik return -EINVAL; 2071c6fd2807SJeff Garzik 2072c6fd2807SJeff Garzik ap->sata_spd_limit = mask; 2073c6fd2807SJeff Garzik 2074c6fd2807SJeff Garzik ata_port_printk(ap, KERN_WARNING, "limiting SATA link speed to %s\n", 2075c6fd2807SJeff Garzik sata_spd_string(fls(mask))); 2076c6fd2807SJeff Garzik 2077c6fd2807SJeff Garzik return 0; 2078c6fd2807SJeff Garzik } 2079c6fd2807SJeff Garzik 2080c6fd2807SJeff Garzik static int __sata_set_spd_needed(struct ata_port *ap, u32 *scontrol) 2081c6fd2807SJeff Garzik { 2082c6fd2807SJeff Garzik u32 spd, limit; 2083c6fd2807SJeff Garzik 2084c6fd2807SJeff Garzik if (ap->sata_spd_limit == UINT_MAX) 2085c6fd2807SJeff Garzik limit = 0; 2086c6fd2807SJeff Garzik else 2087c6fd2807SJeff Garzik limit = fls(ap->sata_spd_limit); 2088c6fd2807SJeff Garzik 2089c6fd2807SJeff Garzik spd = (*scontrol >> 4) & 0xf; 2090c6fd2807SJeff Garzik *scontrol = (*scontrol & ~0xf0) | ((limit & 0xf) << 4); 2091c6fd2807SJeff Garzik 2092c6fd2807SJeff Garzik return spd != limit; 2093c6fd2807SJeff Garzik } 2094c6fd2807SJeff Garzik 2095c6fd2807SJeff Garzik /** 2096c6fd2807SJeff Garzik * sata_set_spd_needed - is SATA spd configuration needed 2097c6fd2807SJeff Garzik * @ap: Port in question 2098c6fd2807SJeff Garzik * 2099c6fd2807SJeff Garzik * Test whether the spd limit in SControl matches 2100c6fd2807SJeff Garzik * @ap->sata_spd_limit. This function is used to determine 2101c6fd2807SJeff Garzik * whether hardreset is necessary to apply SATA spd 2102c6fd2807SJeff Garzik * configuration. 2103c6fd2807SJeff Garzik * 2104c6fd2807SJeff Garzik * LOCKING: 2105c6fd2807SJeff Garzik * Inherited from caller. 2106c6fd2807SJeff Garzik * 2107c6fd2807SJeff Garzik * RETURNS: 2108c6fd2807SJeff Garzik * 1 if SATA spd configuration is needed, 0 otherwise. 2109c6fd2807SJeff Garzik */ 2110c6fd2807SJeff Garzik int sata_set_spd_needed(struct ata_port *ap) 2111c6fd2807SJeff Garzik { 2112c6fd2807SJeff Garzik u32 scontrol; 2113c6fd2807SJeff Garzik 2114c6fd2807SJeff Garzik if (sata_scr_read(ap, SCR_CONTROL, &scontrol)) 2115c6fd2807SJeff Garzik return 0; 2116c6fd2807SJeff Garzik 2117c6fd2807SJeff Garzik return __sata_set_spd_needed(ap, &scontrol); 2118c6fd2807SJeff Garzik } 2119c6fd2807SJeff Garzik 2120c6fd2807SJeff Garzik /** 2121c6fd2807SJeff Garzik * sata_set_spd - set SATA spd according to spd limit 2122c6fd2807SJeff Garzik * @ap: Port to set SATA spd for 2123c6fd2807SJeff Garzik * 2124c6fd2807SJeff Garzik * Set SATA spd of @ap according to sata_spd_limit. 2125c6fd2807SJeff Garzik * 2126c6fd2807SJeff Garzik * LOCKING: 2127c6fd2807SJeff Garzik * Inherited from caller. 2128c6fd2807SJeff Garzik * 2129c6fd2807SJeff Garzik * RETURNS: 2130c6fd2807SJeff Garzik * 0 if spd doesn't need to be changed, 1 if spd has been 2131c6fd2807SJeff Garzik * changed. Negative errno if SCR registers are inaccessible. 2132c6fd2807SJeff Garzik */ 2133c6fd2807SJeff Garzik int sata_set_spd(struct ata_port *ap) 2134c6fd2807SJeff Garzik { 2135c6fd2807SJeff Garzik u32 scontrol; 2136c6fd2807SJeff Garzik int rc; 2137c6fd2807SJeff Garzik 2138c6fd2807SJeff Garzik if ((rc = sata_scr_read(ap, SCR_CONTROL, &scontrol))) 2139c6fd2807SJeff Garzik return rc; 2140c6fd2807SJeff Garzik 2141c6fd2807SJeff Garzik if (!__sata_set_spd_needed(ap, &scontrol)) 2142c6fd2807SJeff Garzik return 0; 2143c6fd2807SJeff Garzik 2144c6fd2807SJeff Garzik if ((rc = sata_scr_write(ap, SCR_CONTROL, scontrol))) 2145c6fd2807SJeff Garzik return rc; 2146c6fd2807SJeff Garzik 2147c6fd2807SJeff Garzik return 1; 2148c6fd2807SJeff Garzik } 2149c6fd2807SJeff Garzik 2150c6fd2807SJeff Garzik /* 2151c6fd2807SJeff Garzik * This mode timing computation functionality is ported over from 2152c6fd2807SJeff Garzik * drivers/ide/ide-timing.h and was originally written by Vojtech Pavlik 2153c6fd2807SJeff Garzik */ 2154c6fd2807SJeff Garzik /* 2155b352e57dSAlan Cox * PIO 0-4, MWDMA 0-2 and UDMA 0-6 timings (in nanoseconds). 2156c6fd2807SJeff Garzik * These were taken from ATA/ATAPI-6 standard, rev 0a, except 2157b352e57dSAlan Cox * for UDMA6, which is currently supported only by Maxtor drives. 2158b352e57dSAlan Cox * 2159b352e57dSAlan Cox * For PIO 5/6 MWDMA 3/4 see the CFA specification 3.0. 2160c6fd2807SJeff Garzik */ 2161c6fd2807SJeff Garzik 2162c6fd2807SJeff Garzik static const struct ata_timing ata_timing[] = { 2163c6fd2807SJeff Garzik 2164c6fd2807SJeff Garzik { XFER_UDMA_6, 0, 0, 0, 0, 0, 0, 0, 15 }, 2165c6fd2807SJeff Garzik { XFER_UDMA_5, 0, 0, 0, 0, 0, 0, 0, 20 }, 2166c6fd2807SJeff Garzik { XFER_UDMA_4, 0, 0, 0, 0, 0, 0, 0, 30 }, 2167c6fd2807SJeff Garzik { XFER_UDMA_3, 0, 0, 0, 0, 0, 0, 0, 45 }, 2168c6fd2807SJeff Garzik 2169b352e57dSAlan Cox { XFER_MW_DMA_4, 25, 0, 0, 0, 55, 20, 80, 0 }, 2170b352e57dSAlan Cox { XFER_MW_DMA_3, 25, 0, 0, 0, 65, 25, 100, 0 }, 2171c6fd2807SJeff Garzik { XFER_UDMA_2, 0, 0, 0, 0, 0, 0, 0, 60 }, 2172c6fd2807SJeff Garzik { XFER_UDMA_1, 0, 0, 0, 0, 0, 0, 0, 80 }, 2173c6fd2807SJeff Garzik { XFER_UDMA_0, 0, 0, 0, 0, 0, 0, 0, 120 }, 2174c6fd2807SJeff Garzik 2175c6fd2807SJeff Garzik /* { XFER_UDMA_SLOW, 0, 0, 0, 0, 0, 0, 0, 150 }, */ 2176c6fd2807SJeff Garzik 2177c6fd2807SJeff Garzik { XFER_MW_DMA_2, 25, 0, 0, 0, 70, 25, 120, 0 }, 2178c6fd2807SJeff Garzik { XFER_MW_DMA_1, 45, 0, 0, 0, 80, 50, 150, 0 }, 2179c6fd2807SJeff Garzik { XFER_MW_DMA_0, 60, 0, 0, 0, 215, 215, 480, 0 }, 2180c6fd2807SJeff Garzik 2181c6fd2807SJeff Garzik { XFER_SW_DMA_2, 60, 0, 0, 0, 120, 120, 240, 0 }, 2182c6fd2807SJeff Garzik { XFER_SW_DMA_1, 90, 0, 0, 0, 240, 240, 480, 0 }, 2183c6fd2807SJeff Garzik { XFER_SW_DMA_0, 120, 0, 0, 0, 480, 480, 960, 0 }, 2184c6fd2807SJeff Garzik 2185b352e57dSAlan Cox { XFER_PIO_6, 10, 55, 20, 80, 55, 20, 80, 0 }, 2186b352e57dSAlan Cox { XFER_PIO_5, 15, 65, 25, 100, 65, 25, 100, 0 }, 2187c6fd2807SJeff Garzik { XFER_PIO_4, 25, 70, 25, 120, 70, 25, 120, 0 }, 2188c6fd2807SJeff Garzik { XFER_PIO_3, 30, 80, 70, 180, 80, 70, 180, 0 }, 2189c6fd2807SJeff Garzik 2190c6fd2807SJeff Garzik { XFER_PIO_2, 30, 290, 40, 330, 100, 90, 240, 0 }, 2191c6fd2807SJeff Garzik { XFER_PIO_1, 50, 290, 93, 383, 125, 100, 383, 0 }, 2192c6fd2807SJeff Garzik { XFER_PIO_0, 70, 290, 240, 600, 165, 150, 600, 0 }, 2193c6fd2807SJeff Garzik 2194c6fd2807SJeff Garzik /* { XFER_PIO_SLOW, 120, 290, 240, 960, 290, 240, 960, 0 }, */ 2195c6fd2807SJeff Garzik 2196c6fd2807SJeff Garzik { 0xFF } 2197c6fd2807SJeff Garzik }; 2198c6fd2807SJeff Garzik 2199c6fd2807SJeff Garzik #define ENOUGH(v,unit) (((v)-1)/(unit)+1) 2200c6fd2807SJeff Garzik #define EZ(v,unit) ((v)?ENOUGH(v,unit):0) 2201c6fd2807SJeff Garzik 2202c6fd2807SJeff Garzik static void ata_timing_quantize(const struct ata_timing *t, struct ata_timing *q, int T, int UT) 2203c6fd2807SJeff Garzik { 2204c6fd2807SJeff Garzik q->setup = EZ(t->setup * 1000, T); 2205c6fd2807SJeff Garzik q->act8b = EZ(t->act8b * 1000, T); 2206c6fd2807SJeff Garzik q->rec8b = EZ(t->rec8b * 1000, T); 2207c6fd2807SJeff Garzik q->cyc8b = EZ(t->cyc8b * 1000, T); 2208c6fd2807SJeff Garzik q->active = EZ(t->active * 1000, T); 2209c6fd2807SJeff Garzik q->recover = EZ(t->recover * 1000, T); 2210c6fd2807SJeff Garzik q->cycle = EZ(t->cycle * 1000, T); 2211c6fd2807SJeff Garzik q->udma = EZ(t->udma * 1000, UT); 2212c6fd2807SJeff Garzik } 2213c6fd2807SJeff Garzik 2214c6fd2807SJeff Garzik void ata_timing_merge(const struct ata_timing *a, const struct ata_timing *b, 2215c6fd2807SJeff Garzik struct ata_timing *m, unsigned int what) 2216c6fd2807SJeff Garzik { 2217c6fd2807SJeff Garzik if (what & ATA_TIMING_SETUP ) m->setup = max(a->setup, b->setup); 2218c6fd2807SJeff Garzik if (what & ATA_TIMING_ACT8B ) m->act8b = max(a->act8b, b->act8b); 2219c6fd2807SJeff Garzik if (what & ATA_TIMING_REC8B ) m->rec8b = max(a->rec8b, b->rec8b); 2220c6fd2807SJeff Garzik if (what & ATA_TIMING_CYC8B ) m->cyc8b = max(a->cyc8b, b->cyc8b); 2221c6fd2807SJeff Garzik if (what & ATA_TIMING_ACTIVE ) m->active = max(a->active, b->active); 2222c6fd2807SJeff Garzik if (what & ATA_TIMING_RECOVER) m->recover = max(a->recover, b->recover); 2223c6fd2807SJeff Garzik if (what & ATA_TIMING_CYCLE ) m->cycle = max(a->cycle, b->cycle); 2224c6fd2807SJeff Garzik if (what & ATA_TIMING_UDMA ) m->udma = max(a->udma, b->udma); 2225c6fd2807SJeff Garzik } 2226c6fd2807SJeff Garzik 2227c6fd2807SJeff Garzik static const struct ata_timing* ata_timing_find_mode(unsigned short speed) 2228c6fd2807SJeff Garzik { 2229c6fd2807SJeff Garzik const struct ata_timing *t; 2230c6fd2807SJeff Garzik 2231c6fd2807SJeff Garzik for (t = ata_timing; t->mode != speed; t++) 2232c6fd2807SJeff Garzik if (t->mode == 0xFF) 2233c6fd2807SJeff Garzik return NULL; 2234c6fd2807SJeff Garzik return t; 2235c6fd2807SJeff Garzik } 2236c6fd2807SJeff Garzik 2237c6fd2807SJeff Garzik int ata_timing_compute(struct ata_device *adev, unsigned short speed, 2238c6fd2807SJeff Garzik struct ata_timing *t, int T, int UT) 2239c6fd2807SJeff Garzik { 2240c6fd2807SJeff Garzik const struct ata_timing *s; 2241c6fd2807SJeff Garzik struct ata_timing p; 2242c6fd2807SJeff Garzik 2243c6fd2807SJeff Garzik /* 2244c6fd2807SJeff Garzik * Find the mode. 2245c6fd2807SJeff Garzik */ 2246c6fd2807SJeff Garzik 2247c6fd2807SJeff Garzik if (!(s = ata_timing_find_mode(speed))) 2248c6fd2807SJeff Garzik return -EINVAL; 2249c6fd2807SJeff Garzik 2250c6fd2807SJeff Garzik memcpy(t, s, sizeof(*s)); 2251c6fd2807SJeff Garzik 2252c6fd2807SJeff Garzik /* 2253c6fd2807SJeff Garzik * If the drive is an EIDE drive, it can tell us it needs extended 2254c6fd2807SJeff Garzik * PIO/MW_DMA cycle timing. 2255c6fd2807SJeff Garzik */ 2256c6fd2807SJeff Garzik 2257c6fd2807SJeff Garzik if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE drive */ 2258c6fd2807SJeff Garzik memset(&p, 0, sizeof(p)); 2259c6fd2807SJeff Garzik if(speed >= XFER_PIO_0 && speed <= XFER_SW_DMA_0) { 2260c6fd2807SJeff Garzik if (speed <= XFER_PIO_2) p.cycle = p.cyc8b = adev->id[ATA_ID_EIDE_PIO]; 2261c6fd2807SJeff Garzik else p.cycle = p.cyc8b = adev->id[ATA_ID_EIDE_PIO_IORDY]; 2262c6fd2807SJeff Garzik } else if(speed >= XFER_MW_DMA_0 && speed <= XFER_MW_DMA_2) { 2263c6fd2807SJeff Garzik p.cycle = adev->id[ATA_ID_EIDE_DMA_MIN]; 2264c6fd2807SJeff Garzik } 2265c6fd2807SJeff Garzik ata_timing_merge(&p, t, t, ATA_TIMING_CYCLE | ATA_TIMING_CYC8B); 2266c6fd2807SJeff Garzik } 2267c6fd2807SJeff Garzik 2268c6fd2807SJeff Garzik /* 2269c6fd2807SJeff Garzik * Convert the timing to bus clock counts. 2270c6fd2807SJeff Garzik */ 2271c6fd2807SJeff Garzik 2272c6fd2807SJeff Garzik ata_timing_quantize(t, t, T, UT); 2273c6fd2807SJeff Garzik 2274c6fd2807SJeff Garzik /* 2275c6fd2807SJeff Garzik * Even in DMA/UDMA modes we still use PIO access for IDENTIFY, 2276c6fd2807SJeff Garzik * S.M.A.R.T * and some other commands. We have to ensure that the 2277c6fd2807SJeff Garzik * DMA cycle timing is slower/equal than the fastest PIO timing. 2278c6fd2807SJeff Garzik */ 2279c6fd2807SJeff Garzik 2280fd3367afSAlan if (speed > XFER_PIO_6) { 2281c6fd2807SJeff Garzik ata_timing_compute(adev, adev->pio_mode, &p, T, UT); 2282c6fd2807SJeff Garzik ata_timing_merge(&p, t, t, ATA_TIMING_ALL); 2283c6fd2807SJeff Garzik } 2284c6fd2807SJeff Garzik 2285c6fd2807SJeff Garzik /* 2286c6fd2807SJeff Garzik * Lengthen active & recovery time so that cycle time is correct. 2287c6fd2807SJeff Garzik */ 2288c6fd2807SJeff Garzik 2289c6fd2807SJeff Garzik if (t->act8b + t->rec8b < t->cyc8b) { 2290c6fd2807SJeff Garzik t->act8b += (t->cyc8b - (t->act8b + t->rec8b)) / 2; 2291c6fd2807SJeff Garzik t->rec8b = t->cyc8b - t->act8b; 2292c6fd2807SJeff Garzik } 2293c6fd2807SJeff Garzik 2294c6fd2807SJeff Garzik if (t->active + t->recover < t->cycle) { 2295c6fd2807SJeff Garzik t->active += (t->cycle - (t->active + t->recover)) / 2; 2296c6fd2807SJeff Garzik t->recover = t->cycle - t->active; 2297c6fd2807SJeff Garzik } 2298c6fd2807SJeff Garzik 2299c6fd2807SJeff Garzik return 0; 2300c6fd2807SJeff Garzik } 2301c6fd2807SJeff Garzik 2302c6fd2807SJeff Garzik /** 2303c6fd2807SJeff Garzik * ata_down_xfermask_limit - adjust dev xfer masks downward 2304c6fd2807SJeff Garzik * @dev: Device to adjust xfer masks 2305458337dbSTejun Heo * @sel: ATA_DNXFER_* selector 2306c6fd2807SJeff Garzik * 2307c6fd2807SJeff Garzik * Adjust xfer masks of @dev downward. Note that this function 2308c6fd2807SJeff Garzik * does not apply the change. Invoking ata_set_mode() afterwards 2309c6fd2807SJeff Garzik * will apply the limit. 2310c6fd2807SJeff Garzik * 2311c6fd2807SJeff Garzik * LOCKING: 2312c6fd2807SJeff Garzik * Inherited from caller. 2313c6fd2807SJeff Garzik * 2314c6fd2807SJeff Garzik * RETURNS: 2315c6fd2807SJeff Garzik * 0 on success, negative errno on failure 2316c6fd2807SJeff Garzik */ 2317458337dbSTejun Heo int ata_down_xfermask_limit(struct ata_device *dev, unsigned int sel) 2318c6fd2807SJeff Garzik { 2319458337dbSTejun Heo char buf[32]; 2320458337dbSTejun Heo unsigned int orig_mask, xfer_mask; 2321458337dbSTejun Heo unsigned int pio_mask, mwdma_mask, udma_mask; 2322458337dbSTejun Heo int quiet, highbit; 2323c6fd2807SJeff Garzik 2324458337dbSTejun Heo quiet = !!(sel & ATA_DNXFER_QUIET); 2325458337dbSTejun Heo sel &= ~ATA_DNXFER_QUIET; 2326458337dbSTejun Heo 2327458337dbSTejun Heo xfer_mask = orig_mask = ata_pack_xfermask(dev->pio_mask, 2328458337dbSTejun Heo dev->mwdma_mask, 2329c6fd2807SJeff Garzik dev->udma_mask); 2330458337dbSTejun Heo ata_unpack_xfermask(xfer_mask, &pio_mask, &mwdma_mask, &udma_mask); 2331c6fd2807SJeff Garzik 2332458337dbSTejun Heo switch (sel) { 2333458337dbSTejun Heo case ATA_DNXFER_PIO: 2334458337dbSTejun Heo highbit = fls(pio_mask) - 1; 2335458337dbSTejun Heo pio_mask &= ~(1 << highbit); 2336458337dbSTejun Heo break; 2337458337dbSTejun Heo 2338458337dbSTejun Heo case ATA_DNXFER_DMA: 2339458337dbSTejun Heo if (udma_mask) { 2340458337dbSTejun Heo highbit = fls(udma_mask) - 1; 2341458337dbSTejun Heo udma_mask &= ~(1 << highbit); 2342458337dbSTejun Heo if (!udma_mask) 2343458337dbSTejun Heo return -ENOENT; 2344458337dbSTejun Heo } else if (mwdma_mask) { 2345458337dbSTejun Heo highbit = fls(mwdma_mask) - 1; 2346458337dbSTejun Heo mwdma_mask &= ~(1 << highbit); 2347458337dbSTejun Heo if (!mwdma_mask) 2348458337dbSTejun Heo return -ENOENT; 2349458337dbSTejun Heo } 2350458337dbSTejun Heo break; 2351458337dbSTejun Heo 2352458337dbSTejun Heo case ATA_DNXFER_40C: 2353458337dbSTejun Heo udma_mask &= ATA_UDMA_MASK_40C; 2354458337dbSTejun Heo break; 2355458337dbSTejun Heo 2356458337dbSTejun Heo case ATA_DNXFER_FORCE_PIO0: 2357458337dbSTejun Heo pio_mask &= 1; 2358458337dbSTejun Heo case ATA_DNXFER_FORCE_PIO: 2359458337dbSTejun Heo mwdma_mask = 0; 2360458337dbSTejun Heo udma_mask = 0; 2361458337dbSTejun Heo break; 2362458337dbSTejun Heo 2363458337dbSTejun Heo case ATA_DNXFER_ANY: 2364c6fd2807SJeff Garzik /* don't gear down to MWDMA from UDMA, go directly to PIO */ 2365c6fd2807SJeff Garzik if (xfer_mask & ATA_MASK_UDMA) 2366c6fd2807SJeff Garzik xfer_mask &= ~ATA_MASK_MWDMA; 2367c6fd2807SJeff Garzik 2368c6fd2807SJeff Garzik highbit = fls(xfer_mask) - 1; 2369c6fd2807SJeff Garzik xfer_mask &= ~(1 << highbit); 2370458337dbSTejun Heo break; 2371458337dbSTejun Heo 2372458337dbSTejun Heo default: 2373458337dbSTejun Heo BUG(); 2374458337dbSTejun Heo } 2375458337dbSTejun Heo 2376458337dbSTejun Heo xfer_mask &= ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask); 2377458337dbSTejun Heo 2378458337dbSTejun Heo if (!(xfer_mask & ATA_MASK_PIO) || xfer_mask == orig_mask) 2379458337dbSTejun Heo return -ENOENT; 2380458337dbSTejun Heo 2381458337dbSTejun Heo if (!quiet) { 2382458337dbSTejun Heo if (xfer_mask & (ATA_MASK_MWDMA | ATA_MASK_UDMA)) 2383458337dbSTejun Heo snprintf(buf, sizeof(buf), "%s:%s", 2384458337dbSTejun Heo ata_mode_string(xfer_mask), 2385458337dbSTejun Heo ata_mode_string(xfer_mask & ATA_MASK_PIO)); 2386458337dbSTejun Heo else 2387458337dbSTejun Heo snprintf(buf, sizeof(buf), "%s", 2388458337dbSTejun Heo ata_mode_string(xfer_mask)); 2389458337dbSTejun Heo 2390458337dbSTejun Heo ata_dev_printk(dev, KERN_WARNING, 2391458337dbSTejun Heo "limiting speed to %s\n", buf); 2392458337dbSTejun Heo } 2393c6fd2807SJeff Garzik 2394c6fd2807SJeff Garzik ata_unpack_xfermask(xfer_mask, &dev->pio_mask, &dev->mwdma_mask, 2395c6fd2807SJeff Garzik &dev->udma_mask); 2396c6fd2807SJeff Garzik 2397c6fd2807SJeff Garzik return 0; 2398c6fd2807SJeff Garzik } 2399c6fd2807SJeff Garzik 2400c6fd2807SJeff Garzik static int ata_dev_set_mode(struct ata_device *dev) 2401c6fd2807SJeff Garzik { 2402baa1e78aSTejun Heo struct ata_eh_context *ehc = &dev->ap->eh_context; 2403c6fd2807SJeff Garzik unsigned int err_mask; 2404c6fd2807SJeff Garzik int rc; 2405c6fd2807SJeff Garzik 2406c6fd2807SJeff Garzik dev->flags &= ~ATA_DFLAG_PIO; 2407c6fd2807SJeff Garzik if (dev->xfer_shift == ATA_SHIFT_PIO) 2408c6fd2807SJeff Garzik dev->flags |= ATA_DFLAG_PIO; 2409c6fd2807SJeff Garzik 2410c6fd2807SJeff Garzik err_mask = ata_dev_set_xfermode(dev); 241111750a40SAlan /* Old CFA may refuse this command, which is just fine */ 241211750a40SAlan if (dev->xfer_shift == ATA_SHIFT_PIO && ata_id_is_cfa(dev->id)) 241311750a40SAlan err_mask &= ~AC_ERR_DEV; 241411750a40SAlan 2415c6fd2807SJeff Garzik if (err_mask) { 2416c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_ERR, "failed to set xfermode " 2417c6fd2807SJeff Garzik "(err_mask=0x%x)\n", err_mask); 2418c6fd2807SJeff Garzik return -EIO; 2419c6fd2807SJeff Garzik } 2420c6fd2807SJeff Garzik 2421baa1e78aSTejun Heo ehc->i.flags |= ATA_EHI_POST_SETMODE; 2422c6fd2807SJeff Garzik rc = ata_dev_revalidate(dev, 0); 2423baa1e78aSTejun Heo ehc->i.flags &= ~ATA_EHI_POST_SETMODE; 2424c6fd2807SJeff Garzik if (rc) 2425c6fd2807SJeff Garzik return rc; 2426c6fd2807SJeff Garzik 2427c6fd2807SJeff Garzik DPRINTK("xfer_shift=%u, xfer_mode=0x%x\n", 2428c6fd2807SJeff Garzik dev->xfer_shift, (int)dev->xfer_mode); 2429c6fd2807SJeff Garzik 2430c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_INFO, "configured for %s\n", 2431c6fd2807SJeff Garzik ata_mode_string(ata_xfer_mode2mask(dev->xfer_mode))); 2432c6fd2807SJeff Garzik return 0; 2433c6fd2807SJeff Garzik } 2434c6fd2807SJeff Garzik 2435c6fd2807SJeff Garzik /** 2436c6fd2807SJeff Garzik * ata_set_mode - Program timings and issue SET FEATURES - XFER 2437c6fd2807SJeff Garzik * @ap: port on which timings will be programmed 2438c6fd2807SJeff Garzik * @r_failed_dev: out paramter for failed device 2439c6fd2807SJeff Garzik * 2440c6fd2807SJeff Garzik * Set ATA device disk transfer mode (PIO3, UDMA6, etc.). If 2441c6fd2807SJeff Garzik * ata_set_mode() fails, pointer to the failing device is 2442c6fd2807SJeff Garzik * returned in @r_failed_dev. 2443c6fd2807SJeff Garzik * 2444c6fd2807SJeff Garzik * LOCKING: 2445c6fd2807SJeff Garzik * PCI/etc. bus probe sem. 2446c6fd2807SJeff Garzik * 2447c6fd2807SJeff Garzik * RETURNS: 2448c6fd2807SJeff Garzik * 0 on success, negative errno otherwise 2449c6fd2807SJeff Garzik */ 2450c6fd2807SJeff Garzik int ata_set_mode(struct ata_port *ap, struct ata_device **r_failed_dev) 2451c6fd2807SJeff Garzik { 2452c6fd2807SJeff Garzik struct ata_device *dev; 2453c6fd2807SJeff Garzik int i, rc = 0, used_dma = 0, found = 0; 2454c6fd2807SJeff Garzik 2455c6fd2807SJeff Garzik /* has private set_mode? */ 2456b229a7b0SAlan if (ap->ops->set_mode) 2457b229a7b0SAlan return ap->ops->set_mode(ap, r_failed_dev); 2458c6fd2807SJeff Garzik 2459c6fd2807SJeff Garzik /* step 1: calculate xfer_mask */ 2460c6fd2807SJeff Garzik for (i = 0; i < ATA_MAX_DEVICES; i++) { 2461c6fd2807SJeff Garzik unsigned int pio_mask, dma_mask; 2462c6fd2807SJeff Garzik 2463c6fd2807SJeff Garzik dev = &ap->device[i]; 2464c6fd2807SJeff Garzik 2465c6fd2807SJeff Garzik if (!ata_dev_enabled(dev)) 2466c6fd2807SJeff Garzik continue; 2467c6fd2807SJeff Garzik 2468c6fd2807SJeff Garzik ata_dev_xfermask(dev); 2469c6fd2807SJeff Garzik 2470c6fd2807SJeff Garzik pio_mask = ata_pack_xfermask(dev->pio_mask, 0, 0); 2471c6fd2807SJeff Garzik dma_mask = ata_pack_xfermask(0, dev->mwdma_mask, dev->udma_mask); 2472c6fd2807SJeff Garzik dev->pio_mode = ata_xfer_mask2mode(pio_mask); 2473c6fd2807SJeff Garzik dev->dma_mode = ata_xfer_mask2mode(dma_mask); 2474c6fd2807SJeff Garzik 2475c6fd2807SJeff Garzik found = 1; 2476c6fd2807SJeff Garzik if (dev->dma_mode) 2477c6fd2807SJeff Garzik used_dma = 1; 2478c6fd2807SJeff Garzik } 2479c6fd2807SJeff Garzik if (!found) 2480c6fd2807SJeff Garzik goto out; 2481c6fd2807SJeff Garzik 2482c6fd2807SJeff Garzik /* step 2: always set host PIO timings */ 2483c6fd2807SJeff Garzik for (i = 0; i < ATA_MAX_DEVICES; i++) { 2484c6fd2807SJeff Garzik dev = &ap->device[i]; 2485c6fd2807SJeff Garzik if (!ata_dev_enabled(dev)) 2486c6fd2807SJeff Garzik continue; 2487c6fd2807SJeff Garzik 2488c6fd2807SJeff Garzik if (!dev->pio_mode) { 2489c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_WARNING, "no PIO support\n"); 2490c6fd2807SJeff Garzik rc = -EINVAL; 2491c6fd2807SJeff Garzik goto out; 2492c6fd2807SJeff Garzik } 2493c6fd2807SJeff Garzik 2494c6fd2807SJeff Garzik dev->xfer_mode = dev->pio_mode; 2495c6fd2807SJeff Garzik dev->xfer_shift = ATA_SHIFT_PIO; 2496c6fd2807SJeff Garzik if (ap->ops->set_piomode) 2497c6fd2807SJeff Garzik ap->ops->set_piomode(ap, dev); 2498c6fd2807SJeff Garzik } 2499c6fd2807SJeff Garzik 2500c6fd2807SJeff Garzik /* step 3: set host DMA timings */ 2501c6fd2807SJeff Garzik for (i = 0; i < ATA_MAX_DEVICES; i++) { 2502c6fd2807SJeff Garzik dev = &ap->device[i]; 2503c6fd2807SJeff Garzik 2504c6fd2807SJeff Garzik if (!ata_dev_enabled(dev) || !dev->dma_mode) 2505c6fd2807SJeff Garzik continue; 2506c6fd2807SJeff Garzik 2507c6fd2807SJeff Garzik dev->xfer_mode = dev->dma_mode; 2508c6fd2807SJeff Garzik dev->xfer_shift = ata_xfer_mode2shift(dev->dma_mode); 2509c6fd2807SJeff Garzik if (ap->ops->set_dmamode) 2510c6fd2807SJeff Garzik ap->ops->set_dmamode(ap, dev); 2511c6fd2807SJeff Garzik } 2512c6fd2807SJeff Garzik 2513c6fd2807SJeff Garzik /* step 4: update devices' xfer mode */ 2514c6fd2807SJeff Garzik for (i = 0; i < ATA_MAX_DEVICES; i++) { 2515c6fd2807SJeff Garzik dev = &ap->device[i]; 2516c6fd2807SJeff Garzik 251718d90debSAlan /* don't update suspended devices' xfer mode */ 2518c6fd2807SJeff Garzik if (!ata_dev_ready(dev)) 2519c6fd2807SJeff Garzik continue; 2520c6fd2807SJeff Garzik 2521c6fd2807SJeff Garzik rc = ata_dev_set_mode(dev); 2522c6fd2807SJeff Garzik if (rc) 2523c6fd2807SJeff Garzik goto out; 2524c6fd2807SJeff Garzik } 2525c6fd2807SJeff Garzik 2526c6fd2807SJeff Garzik /* Record simplex status. If we selected DMA then the other 2527c6fd2807SJeff Garzik * host channels are not permitted to do so. 2528c6fd2807SJeff Garzik */ 2529cca3974eSJeff Garzik if (used_dma && (ap->host->flags & ATA_HOST_SIMPLEX)) 2530cca3974eSJeff Garzik ap->host->simplex_claimed = 1; 2531c6fd2807SJeff Garzik 2532c6fd2807SJeff Garzik /* step5: chip specific finalisation */ 2533c6fd2807SJeff Garzik if (ap->ops->post_set_mode) 2534c6fd2807SJeff Garzik ap->ops->post_set_mode(ap); 2535c6fd2807SJeff Garzik 2536c6fd2807SJeff Garzik out: 2537c6fd2807SJeff Garzik if (rc) 2538c6fd2807SJeff Garzik *r_failed_dev = dev; 2539c6fd2807SJeff Garzik return rc; 2540c6fd2807SJeff Garzik } 2541c6fd2807SJeff Garzik 2542c6fd2807SJeff Garzik /** 2543c6fd2807SJeff Garzik * ata_tf_to_host - issue ATA taskfile to host controller 2544c6fd2807SJeff Garzik * @ap: port to which command is being issued 2545c6fd2807SJeff Garzik * @tf: ATA taskfile register set 2546c6fd2807SJeff Garzik * 2547c6fd2807SJeff Garzik * Issues ATA taskfile register set to ATA host controller, 2548c6fd2807SJeff Garzik * with proper synchronization with interrupt handler and 2549c6fd2807SJeff Garzik * other threads. 2550c6fd2807SJeff Garzik * 2551c6fd2807SJeff Garzik * LOCKING: 2552cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 2553c6fd2807SJeff Garzik */ 2554c6fd2807SJeff Garzik 2555c6fd2807SJeff Garzik static inline void ata_tf_to_host(struct ata_port *ap, 2556c6fd2807SJeff Garzik const struct ata_taskfile *tf) 2557c6fd2807SJeff Garzik { 2558c6fd2807SJeff Garzik ap->ops->tf_load(ap, tf); 2559c6fd2807SJeff Garzik ap->ops->exec_command(ap, tf); 2560c6fd2807SJeff Garzik } 2561c6fd2807SJeff Garzik 2562c6fd2807SJeff Garzik /** 2563c6fd2807SJeff Garzik * ata_busy_sleep - sleep until BSY clears, or timeout 2564c6fd2807SJeff Garzik * @ap: port containing status register to be polled 2565c6fd2807SJeff Garzik * @tmout_pat: impatience timeout 2566c6fd2807SJeff Garzik * @tmout: overall timeout 2567c6fd2807SJeff Garzik * 2568c6fd2807SJeff Garzik * Sleep until ATA Status register bit BSY clears, 2569c6fd2807SJeff Garzik * or a timeout occurs. 2570c6fd2807SJeff Garzik * 2571d1adc1bbSTejun Heo * LOCKING: 2572d1adc1bbSTejun Heo * Kernel thread context (may sleep). 2573d1adc1bbSTejun Heo * 2574d1adc1bbSTejun Heo * RETURNS: 2575d1adc1bbSTejun Heo * 0 on success, -errno otherwise. 2576c6fd2807SJeff Garzik */ 2577d1adc1bbSTejun Heo int ata_busy_sleep(struct ata_port *ap, 2578c6fd2807SJeff Garzik unsigned long tmout_pat, unsigned long tmout) 2579c6fd2807SJeff Garzik { 2580c6fd2807SJeff Garzik unsigned long timer_start, timeout; 2581c6fd2807SJeff Garzik u8 status; 2582c6fd2807SJeff Garzik 2583c6fd2807SJeff Garzik status = ata_busy_wait(ap, ATA_BUSY, 300); 2584c6fd2807SJeff Garzik timer_start = jiffies; 2585c6fd2807SJeff Garzik timeout = timer_start + tmout_pat; 2586d1adc1bbSTejun Heo while (status != 0xff && (status & ATA_BUSY) && 2587d1adc1bbSTejun Heo time_before(jiffies, timeout)) { 2588c6fd2807SJeff Garzik msleep(50); 2589c6fd2807SJeff Garzik status = ata_busy_wait(ap, ATA_BUSY, 3); 2590c6fd2807SJeff Garzik } 2591c6fd2807SJeff Garzik 2592d1adc1bbSTejun Heo if (status != 0xff && (status & ATA_BUSY)) 2593c6fd2807SJeff Garzik ata_port_printk(ap, KERN_WARNING, 259435aa7a43SJeff Garzik "port is slow to respond, please be patient " 259535aa7a43SJeff Garzik "(Status 0x%x)\n", status); 2596c6fd2807SJeff Garzik 2597c6fd2807SJeff Garzik timeout = timer_start + tmout; 2598d1adc1bbSTejun Heo while (status != 0xff && (status & ATA_BUSY) && 2599d1adc1bbSTejun Heo time_before(jiffies, timeout)) { 2600c6fd2807SJeff Garzik msleep(50); 2601c6fd2807SJeff Garzik status = ata_chk_status(ap); 2602c6fd2807SJeff Garzik } 2603c6fd2807SJeff Garzik 2604d1adc1bbSTejun Heo if (status == 0xff) 2605d1adc1bbSTejun Heo return -ENODEV; 2606d1adc1bbSTejun Heo 2607c6fd2807SJeff Garzik if (status & ATA_BUSY) { 2608c6fd2807SJeff Garzik ata_port_printk(ap, KERN_ERR, "port failed to respond " 260935aa7a43SJeff Garzik "(%lu secs, Status 0x%x)\n", 261035aa7a43SJeff Garzik tmout / HZ, status); 2611d1adc1bbSTejun Heo return -EBUSY; 2612c6fd2807SJeff Garzik } 2613c6fd2807SJeff Garzik 2614c6fd2807SJeff Garzik return 0; 2615c6fd2807SJeff Garzik } 2616c6fd2807SJeff Garzik 2617c6fd2807SJeff Garzik static void ata_bus_post_reset(struct ata_port *ap, unsigned int devmask) 2618c6fd2807SJeff Garzik { 2619c6fd2807SJeff Garzik struct ata_ioports *ioaddr = &ap->ioaddr; 2620c6fd2807SJeff Garzik unsigned int dev0 = devmask & (1 << 0); 2621c6fd2807SJeff Garzik unsigned int dev1 = devmask & (1 << 1); 2622c6fd2807SJeff Garzik unsigned long timeout; 2623c6fd2807SJeff Garzik 2624c6fd2807SJeff Garzik /* if device 0 was found in ata_devchk, wait for its 2625c6fd2807SJeff Garzik * BSY bit to clear 2626c6fd2807SJeff Garzik */ 2627c6fd2807SJeff Garzik if (dev0) 2628c6fd2807SJeff Garzik ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT); 2629c6fd2807SJeff Garzik 2630c6fd2807SJeff Garzik /* if device 1 was found in ata_devchk, wait for 2631c6fd2807SJeff Garzik * register access, then wait for BSY to clear 2632c6fd2807SJeff Garzik */ 2633c6fd2807SJeff Garzik timeout = jiffies + ATA_TMOUT_BOOT; 2634c6fd2807SJeff Garzik while (dev1) { 2635c6fd2807SJeff Garzik u8 nsect, lbal; 2636c6fd2807SJeff Garzik 2637c6fd2807SJeff Garzik ap->ops->dev_select(ap, 1); 26380d5ff566STejun Heo nsect = ioread8(ioaddr->nsect_addr); 26390d5ff566STejun Heo lbal = ioread8(ioaddr->lbal_addr); 2640c6fd2807SJeff Garzik if ((nsect == 1) && (lbal == 1)) 2641c6fd2807SJeff Garzik break; 2642c6fd2807SJeff Garzik if (time_after(jiffies, timeout)) { 2643c6fd2807SJeff Garzik dev1 = 0; 2644c6fd2807SJeff Garzik break; 2645c6fd2807SJeff Garzik } 2646c6fd2807SJeff Garzik msleep(50); /* give drive a breather */ 2647c6fd2807SJeff Garzik } 2648c6fd2807SJeff Garzik if (dev1) 2649c6fd2807SJeff Garzik ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT); 2650c6fd2807SJeff Garzik 2651c6fd2807SJeff Garzik /* is all this really necessary? */ 2652c6fd2807SJeff Garzik ap->ops->dev_select(ap, 0); 2653c6fd2807SJeff Garzik if (dev1) 2654c6fd2807SJeff Garzik ap->ops->dev_select(ap, 1); 2655c6fd2807SJeff Garzik if (dev0) 2656c6fd2807SJeff Garzik ap->ops->dev_select(ap, 0); 2657c6fd2807SJeff Garzik } 2658c6fd2807SJeff Garzik 2659c6fd2807SJeff Garzik static unsigned int ata_bus_softreset(struct ata_port *ap, 2660c6fd2807SJeff Garzik unsigned int devmask) 2661c6fd2807SJeff Garzik { 2662c6fd2807SJeff Garzik struct ata_ioports *ioaddr = &ap->ioaddr; 2663c6fd2807SJeff Garzik 2664c6fd2807SJeff Garzik DPRINTK("ata%u: bus reset via SRST\n", ap->id); 2665c6fd2807SJeff Garzik 2666c6fd2807SJeff Garzik /* software reset. causes dev0 to be selected */ 26670d5ff566STejun Heo iowrite8(ap->ctl, ioaddr->ctl_addr); 2668c6fd2807SJeff Garzik udelay(20); /* FIXME: flush */ 26690d5ff566STejun Heo iowrite8(ap->ctl | ATA_SRST, ioaddr->ctl_addr); 2670c6fd2807SJeff Garzik udelay(20); /* FIXME: flush */ 26710d5ff566STejun Heo iowrite8(ap->ctl, ioaddr->ctl_addr); 2672c6fd2807SJeff Garzik 2673c6fd2807SJeff Garzik /* spec mandates ">= 2ms" before checking status. 2674c6fd2807SJeff Garzik * We wait 150ms, because that was the magic delay used for 2675c6fd2807SJeff Garzik * ATAPI devices in Hale Landis's ATADRVR, for the period of time 2676c6fd2807SJeff Garzik * between when the ATA command register is written, and then 2677c6fd2807SJeff Garzik * status is checked. Because waiting for "a while" before 2678c6fd2807SJeff Garzik * checking status is fine, post SRST, we perform this magic 2679c6fd2807SJeff Garzik * delay here as well. 2680c6fd2807SJeff Garzik * 2681c6fd2807SJeff Garzik * Old drivers/ide uses the 2mS rule and then waits for ready 2682c6fd2807SJeff Garzik */ 2683c6fd2807SJeff Garzik msleep(150); 2684c6fd2807SJeff Garzik 2685c6fd2807SJeff Garzik /* Before we perform post reset processing we want to see if 2686c6fd2807SJeff Garzik * the bus shows 0xFF because the odd clown forgets the D7 2687c6fd2807SJeff Garzik * pulldown resistor. 2688c6fd2807SJeff Garzik */ 2689d1adc1bbSTejun Heo if (ata_check_status(ap) == 0xFF) 2690d1adc1bbSTejun Heo return 0; 2691c6fd2807SJeff Garzik 2692c6fd2807SJeff Garzik ata_bus_post_reset(ap, devmask); 2693c6fd2807SJeff Garzik 2694c6fd2807SJeff Garzik return 0; 2695c6fd2807SJeff Garzik } 2696c6fd2807SJeff Garzik 2697c6fd2807SJeff Garzik /** 2698c6fd2807SJeff Garzik * ata_bus_reset - reset host port and associated ATA channel 2699c6fd2807SJeff Garzik * @ap: port to reset 2700c6fd2807SJeff Garzik * 2701c6fd2807SJeff Garzik * This is typically the first time we actually start issuing 2702c6fd2807SJeff Garzik * commands to the ATA channel. We wait for BSY to clear, then 2703c6fd2807SJeff Garzik * issue EXECUTE DEVICE DIAGNOSTIC command, polling for its 2704c6fd2807SJeff Garzik * result. Determine what devices, if any, are on the channel 2705c6fd2807SJeff Garzik * by looking at the device 0/1 error register. Look at the signature 2706c6fd2807SJeff Garzik * stored in each device's taskfile registers, to determine if 2707c6fd2807SJeff Garzik * the device is ATA or ATAPI. 2708c6fd2807SJeff Garzik * 2709c6fd2807SJeff Garzik * LOCKING: 2710c6fd2807SJeff Garzik * PCI/etc. bus probe sem. 2711cca3974eSJeff Garzik * Obtains host lock. 2712c6fd2807SJeff Garzik * 2713c6fd2807SJeff Garzik * SIDE EFFECTS: 2714c6fd2807SJeff Garzik * Sets ATA_FLAG_DISABLED if bus reset fails. 2715c6fd2807SJeff Garzik */ 2716c6fd2807SJeff Garzik 2717c6fd2807SJeff Garzik void ata_bus_reset(struct ata_port *ap) 2718c6fd2807SJeff Garzik { 2719c6fd2807SJeff Garzik struct ata_ioports *ioaddr = &ap->ioaddr; 2720c6fd2807SJeff Garzik unsigned int slave_possible = ap->flags & ATA_FLAG_SLAVE_POSS; 2721c6fd2807SJeff Garzik u8 err; 2722c6fd2807SJeff Garzik unsigned int dev0, dev1 = 0, devmask = 0; 2723c6fd2807SJeff Garzik 2724c6fd2807SJeff Garzik DPRINTK("ENTER, host %u, port %u\n", ap->id, ap->port_no); 2725c6fd2807SJeff Garzik 2726c6fd2807SJeff Garzik /* determine if device 0/1 are present */ 2727c6fd2807SJeff Garzik if (ap->flags & ATA_FLAG_SATA_RESET) 2728c6fd2807SJeff Garzik dev0 = 1; 2729c6fd2807SJeff Garzik else { 2730c6fd2807SJeff Garzik dev0 = ata_devchk(ap, 0); 2731c6fd2807SJeff Garzik if (slave_possible) 2732c6fd2807SJeff Garzik dev1 = ata_devchk(ap, 1); 2733c6fd2807SJeff Garzik } 2734c6fd2807SJeff Garzik 2735c6fd2807SJeff Garzik if (dev0) 2736c6fd2807SJeff Garzik devmask |= (1 << 0); 2737c6fd2807SJeff Garzik if (dev1) 2738c6fd2807SJeff Garzik devmask |= (1 << 1); 2739c6fd2807SJeff Garzik 2740c6fd2807SJeff Garzik /* select device 0 again */ 2741c6fd2807SJeff Garzik ap->ops->dev_select(ap, 0); 2742c6fd2807SJeff Garzik 2743c6fd2807SJeff Garzik /* issue bus reset */ 2744c6fd2807SJeff Garzik if (ap->flags & ATA_FLAG_SRST) 2745c6fd2807SJeff Garzik if (ata_bus_softreset(ap, devmask)) 2746c6fd2807SJeff Garzik goto err_out; 2747c6fd2807SJeff Garzik 2748c6fd2807SJeff Garzik /* 2749c6fd2807SJeff Garzik * determine by signature whether we have ATA or ATAPI devices 2750c6fd2807SJeff Garzik */ 2751c6fd2807SJeff Garzik ap->device[0].class = ata_dev_try_classify(ap, 0, &err); 2752c6fd2807SJeff Garzik if ((slave_possible) && (err != 0x81)) 2753c6fd2807SJeff Garzik ap->device[1].class = ata_dev_try_classify(ap, 1, &err); 2754c6fd2807SJeff Garzik 2755c6fd2807SJeff Garzik /* re-enable interrupts */ 275683625006SAkira Iguchi ap->ops->irq_on(ap); 2757c6fd2807SJeff Garzik 2758c6fd2807SJeff Garzik /* is double-select really necessary? */ 2759c6fd2807SJeff Garzik if (ap->device[1].class != ATA_DEV_NONE) 2760c6fd2807SJeff Garzik ap->ops->dev_select(ap, 1); 2761c6fd2807SJeff Garzik if (ap->device[0].class != ATA_DEV_NONE) 2762c6fd2807SJeff Garzik ap->ops->dev_select(ap, 0); 2763c6fd2807SJeff Garzik 2764c6fd2807SJeff Garzik /* if no devices were detected, disable this port */ 2765c6fd2807SJeff Garzik if ((ap->device[0].class == ATA_DEV_NONE) && 2766c6fd2807SJeff Garzik (ap->device[1].class == ATA_DEV_NONE)) 2767c6fd2807SJeff Garzik goto err_out; 2768c6fd2807SJeff Garzik 2769c6fd2807SJeff Garzik if (ap->flags & (ATA_FLAG_SATA_RESET | ATA_FLAG_SRST)) { 2770c6fd2807SJeff Garzik /* set up device control for ATA_FLAG_SATA_RESET */ 27710d5ff566STejun Heo iowrite8(ap->ctl, ioaddr->ctl_addr); 2772c6fd2807SJeff Garzik } 2773c6fd2807SJeff Garzik 2774c6fd2807SJeff Garzik DPRINTK("EXIT\n"); 2775c6fd2807SJeff Garzik return; 2776c6fd2807SJeff Garzik 2777c6fd2807SJeff Garzik err_out: 2778c6fd2807SJeff Garzik ata_port_printk(ap, KERN_ERR, "disabling port\n"); 2779c6fd2807SJeff Garzik ap->ops->port_disable(ap); 2780c6fd2807SJeff Garzik 2781c6fd2807SJeff Garzik DPRINTK("EXIT\n"); 2782c6fd2807SJeff Garzik } 2783c6fd2807SJeff Garzik 2784c6fd2807SJeff Garzik /** 2785c6fd2807SJeff Garzik * sata_phy_debounce - debounce SATA phy status 2786c6fd2807SJeff Garzik * @ap: ATA port to debounce SATA phy status for 2787c6fd2807SJeff Garzik * @params: timing parameters { interval, duratinon, timeout } in msec 2788c6fd2807SJeff Garzik * 2789c6fd2807SJeff Garzik * Make sure SStatus of @ap reaches stable state, determined by 2790c6fd2807SJeff Garzik * holding the same value where DET is not 1 for @duration polled 2791c6fd2807SJeff Garzik * every @interval, before @timeout. Timeout constraints the 2792c6fd2807SJeff Garzik * beginning of the stable state. Because, after hot unplugging, 2793c6fd2807SJeff Garzik * DET gets stuck at 1 on some controllers, this functions waits 2794c6fd2807SJeff Garzik * until timeout then returns 0 if DET is stable at 1. 2795c6fd2807SJeff Garzik * 2796c6fd2807SJeff Garzik * LOCKING: 2797c6fd2807SJeff Garzik * Kernel thread context (may sleep) 2798c6fd2807SJeff Garzik * 2799c6fd2807SJeff Garzik * RETURNS: 2800c6fd2807SJeff Garzik * 0 on success, -errno on failure. 2801c6fd2807SJeff Garzik */ 2802c6fd2807SJeff Garzik int sata_phy_debounce(struct ata_port *ap, const unsigned long *params) 2803c6fd2807SJeff Garzik { 2804c6fd2807SJeff Garzik unsigned long interval_msec = params[0]; 2805c6fd2807SJeff Garzik unsigned long duration = params[1] * HZ / 1000; 2806c6fd2807SJeff Garzik unsigned long timeout = jiffies + params[2] * HZ / 1000; 2807c6fd2807SJeff Garzik unsigned long last_jiffies; 2808c6fd2807SJeff Garzik u32 last, cur; 2809c6fd2807SJeff Garzik int rc; 2810c6fd2807SJeff Garzik 2811c6fd2807SJeff Garzik if ((rc = sata_scr_read(ap, SCR_STATUS, &cur))) 2812c6fd2807SJeff Garzik return rc; 2813c6fd2807SJeff Garzik cur &= 0xf; 2814c6fd2807SJeff Garzik 2815c6fd2807SJeff Garzik last = cur; 2816c6fd2807SJeff Garzik last_jiffies = jiffies; 2817c6fd2807SJeff Garzik 2818c6fd2807SJeff Garzik while (1) { 2819c6fd2807SJeff Garzik msleep(interval_msec); 2820c6fd2807SJeff Garzik if ((rc = sata_scr_read(ap, SCR_STATUS, &cur))) 2821c6fd2807SJeff Garzik return rc; 2822c6fd2807SJeff Garzik cur &= 0xf; 2823c6fd2807SJeff Garzik 2824c6fd2807SJeff Garzik /* DET stable? */ 2825c6fd2807SJeff Garzik if (cur == last) { 2826c6fd2807SJeff Garzik if (cur == 1 && time_before(jiffies, timeout)) 2827c6fd2807SJeff Garzik continue; 2828c6fd2807SJeff Garzik if (time_after(jiffies, last_jiffies + duration)) 2829c6fd2807SJeff Garzik return 0; 2830c6fd2807SJeff Garzik continue; 2831c6fd2807SJeff Garzik } 2832c6fd2807SJeff Garzik 2833c6fd2807SJeff Garzik /* unstable, start over */ 2834c6fd2807SJeff Garzik last = cur; 2835c6fd2807SJeff Garzik last_jiffies = jiffies; 2836c6fd2807SJeff Garzik 2837c6fd2807SJeff Garzik /* check timeout */ 2838c6fd2807SJeff Garzik if (time_after(jiffies, timeout)) 2839c6fd2807SJeff Garzik return -EBUSY; 2840c6fd2807SJeff Garzik } 2841c6fd2807SJeff Garzik } 2842c6fd2807SJeff Garzik 2843c6fd2807SJeff Garzik /** 2844c6fd2807SJeff Garzik * sata_phy_resume - resume SATA phy 2845c6fd2807SJeff Garzik * @ap: ATA port to resume SATA phy for 2846c6fd2807SJeff Garzik * @params: timing parameters { interval, duratinon, timeout } in msec 2847c6fd2807SJeff Garzik * 2848c6fd2807SJeff Garzik * Resume SATA phy of @ap and debounce it. 2849c6fd2807SJeff Garzik * 2850c6fd2807SJeff Garzik * LOCKING: 2851c6fd2807SJeff Garzik * Kernel thread context (may sleep) 2852c6fd2807SJeff Garzik * 2853c6fd2807SJeff Garzik * RETURNS: 2854c6fd2807SJeff Garzik * 0 on success, -errno on failure. 2855c6fd2807SJeff Garzik */ 2856c6fd2807SJeff Garzik int sata_phy_resume(struct ata_port *ap, const unsigned long *params) 2857c6fd2807SJeff Garzik { 2858c6fd2807SJeff Garzik u32 scontrol; 2859c6fd2807SJeff Garzik int rc; 2860c6fd2807SJeff Garzik 2861c6fd2807SJeff Garzik if ((rc = sata_scr_read(ap, SCR_CONTROL, &scontrol))) 2862c6fd2807SJeff Garzik return rc; 2863c6fd2807SJeff Garzik 2864c6fd2807SJeff Garzik scontrol = (scontrol & 0x0f0) | 0x300; 2865c6fd2807SJeff Garzik 2866c6fd2807SJeff Garzik if ((rc = sata_scr_write(ap, SCR_CONTROL, scontrol))) 2867c6fd2807SJeff Garzik return rc; 2868c6fd2807SJeff Garzik 2869c6fd2807SJeff Garzik /* Some PHYs react badly if SStatus is pounded immediately 2870c6fd2807SJeff Garzik * after resuming. Delay 200ms before debouncing. 2871c6fd2807SJeff Garzik */ 2872c6fd2807SJeff Garzik msleep(200); 2873c6fd2807SJeff Garzik 2874c6fd2807SJeff Garzik return sata_phy_debounce(ap, params); 2875c6fd2807SJeff Garzik } 2876c6fd2807SJeff Garzik 2877c6fd2807SJeff Garzik static void ata_wait_spinup(struct ata_port *ap) 2878c6fd2807SJeff Garzik { 2879c6fd2807SJeff Garzik struct ata_eh_context *ehc = &ap->eh_context; 2880c6fd2807SJeff Garzik unsigned long end, secs; 2881c6fd2807SJeff Garzik int rc; 2882c6fd2807SJeff Garzik 2883c6fd2807SJeff Garzik /* first, debounce phy if SATA */ 2884c6fd2807SJeff Garzik if (ap->cbl == ATA_CBL_SATA) { 2885c6fd2807SJeff Garzik rc = sata_phy_debounce(ap, sata_deb_timing_hotplug); 2886c6fd2807SJeff Garzik 2887c6fd2807SJeff Garzik /* if debounced successfully and offline, no need to wait */ 2888c6fd2807SJeff Garzik if ((rc == 0 || rc == -EOPNOTSUPP) && ata_port_offline(ap)) 2889c6fd2807SJeff Garzik return; 2890c6fd2807SJeff Garzik } 2891c6fd2807SJeff Garzik 2892c6fd2807SJeff Garzik /* okay, let's give the drive time to spin up */ 2893c6fd2807SJeff Garzik end = ehc->i.hotplug_timestamp + ATA_SPINUP_WAIT * HZ / 1000; 2894c6fd2807SJeff Garzik secs = ((end - jiffies) + HZ - 1) / HZ; 2895c6fd2807SJeff Garzik 2896c6fd2807SJeff Garzik if (time_after(jiffies, end)) 2897c6fd2807SJeff Garzik return; 2898c6fd2807SJeff Garzik 2899c6fd2807SJeff Garzik if (secs > 5) 2900c6fd2807SJeff Garzik ata_port_printk(ap, KERN_INFO, "waiting for device to spin up " 2901c6fd2807SJeff Garzik "(%lu secs)\n", secs); 2902c6fd2807SJeff Garzik 2903c6fd2807SJeff Garzik schedule_timeout_uninterruptible(end - jiffies); 2904c6fd2807SJeff Garzik } 2905c6fd2807SJeff Garzik 2906c6fd2807SJeff Garzik /** 2907c6fd2807SJeff Garzik * ata_std_prereset - prepare for reset 2908c6fd2807SJeff Garzik * @ap: ATA port to be reset 2909c6fd2807SJeff Garzik * 2910c6fd2807SJeff Garzik * @ap is about to be reset. Initialize it. 2911c6fd2807SJeff Garzik * 2912c6fd2807SJeff Garzik * LOCKING: 2913c6fd2807SJeff Garzik * Kernel thread context (may sleep) 2914c6fd2807SJeff Garzik * 2915c6fd2807SJeff Garzik * RETURNS: 2916c6fd2807SJeff Garzik * 0 on success, -errno otherwise. 2917c6fd2807SJeff Garzik */ 2918c6fd2807SJeff Garzik int ata_std_prereset(struct ata_port *ap) 2919c6fd2807SJeff Garzik { 2920c6fd2807SJeff Garzik struct ata_eh_context *ehc = &ap->eh_context; 2921c6fd2807SJeff Garzik const unsigned long *timing = sata_ehc_deb_timing(ehc); 2922c6fd2807SJeff Garzik int rc; 2923c6fd2807SJeff Garzik 2924c6fd2807SJeff Garzik /* handle link resume & hotplug spinup */ 2925c6fd2807SJeff Garzik if ((ehc->i.flags & ATA_EHI_RESUME_LINK) && 2926c6fd2807SJeff Garzik (ap->flags & ATA_FLAG_HRST_TO_RESUME)) 2927c6fd2807SJeff Garzik ehc->i.action |= ATA_EH_HARDRESET; 2928c6fd2807SJeff Garzik 2929c6fd2807SJeff Garzik if ((ehc->i.flags & ATA_EHI_HOTPLUGGED) && 2930c6fd2807SJeff Garzik (ap->flags & ATA_FLAG_SKIP_D2H_BSY)) 2931c6fd2807SJeff Garzik ata_wait_spinup(ap); 2932c6fd2807SJeff Garzik 2933c6fd2807SJeff Garzik /* if we're about to do hardreset, nothing more to do */ 2934c6fd2807SJeff Garzik if (ehc->i.action & ATA_EH_HARDRESET) 2935c6fd2807SJeff Garzik return 0; 2936c6fd2807SJeff Garzik 2937c6fd2807SJeff Garzik /* if SATA, resume phy */ 2938c6fd2807SJeff Garzik if (ap->cbl == ATA_CBL_SATA) { 2939c6fd2807SJeff Garzik rc = sata_phy_resume(ap, timing); 2940c6fd2807SJeff Garzik if (rc && rc != -EOPNOTSUPP) { 2941c6fd2807SJeff Garzik /* phy resume failed */ 2942c6fd2807SJeff Garzik ata_port_printk(ap, KERN_WARNING, "failed to resume " 2943c6fd2807SJeff Garzik "link for reset (errno=%d)\n", rc); 2944c6fd2807SJeff Garzik return rc; 2945c6fd2807SJeff Garzik } 2946c6fd2807SJeff Garzik } 2947c6fd2807SJeff Garzik 2948c6fd2807SJeff Garzik /* Wait for !BSY if the controller can wait for the first D2H 2949c6fd2807SJeff Garzik * Reg FIS and we don't know that no device is attached. 2950c6fd2807SJeff Garzik */ 2951c6fd2807SJeff Garzik if (!(ap->flags & ATA_FLAG_SKIP_D2H_BSY) && !ata_port_offline(ap)) 2952c6fd2807SJeff Garzik ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT); 2953c6fd2807SJeff Garzik 2954c6fd2807SJeff Garzik return 0; 2955c6fd2807SJeff Garzik } 2956c6fd2807SJeff Garzik 2957c6fd2807SJeff Garzik /** 2958c6fd2807SJeff Garzik * ata_std_softreset - reset host port via ATA SRST 2959c6fd2807SJeff Garzik * @ap: port to reset 2960c6fd2807SJeff Garzik * @classes: resulting classes of attached devices 2961c6fd2807SJeff Garzik * 2962c6fd2807SJeff Garzik * Reset host port using ATA SRST. 2963c6fd2807SJeff Garzik * 2964c6fd2807SJeff Garzik * LOCKING: 2965c6fd2807SJeff Garzik * Kernel thread context (may sleep) 2966c6fd2807SJeff Garzik * 2967c6fd2807SJeff Garzik * RETURNS: 2968c6fd2807SJeff Garzik * 0 on success, -errno otherwise. 2969c6fd2807SJeff Garzik */ 2970c6fd2807SJeff Garzik int ata_std_softreset(struct ata_port *ap, unsigned int *classes) 2971c6fd2807SJeff Garzik { 2972c6fd2807SJeff Garzik unsigned int slave_possible = ap->flags & ATA_FLAG_SLAVE_POSS; 2973c6fd2807SJeff Garzik unsigned int devmask = 0, err_mask; 2974c6fd2807SJeff Garzik u8 err; 2975c6fd2807SJeff Garzik 2976c6fd2807SJeff Garzik DPRINTK("ENTER\n"); 2977c6fd2807SJeff Garzik 2978c6fd2807SJeff Garzik if (ata_port_offline(ap)) { 2979c6fd2807SJeff Garzik classes[0] = ATA_DEV_NONE; 2980c6fd2807SJeff Garzik goto out; 2981c6fd2807SJeff Garzik } 2982c6fd2807SJeff Garzik 2983c6fd2807SJeff Garzik /* determine if device 0/1 are present */ 2984c6fd2807SJeff Garzik if (ata_devchk(ap, 0)) 2985c6fd2807SJeff Garzik devmask |= (1 << 0); 2986c6fd2807SJeff Garzik if (slave_possible && ata_devchk(ap, 1)) 2987c6fd2807SJeff Garzik devmask |= (1 << 1); 2988c6fd2807SJeff Garzik 2989c6fd2807SJeff Garzik /* select device 0 again */ 2990c6fd2807SJeff Garzik ap->ops->dev_select(ap, 0); 2991c6fd2807SJeff Garzik 2992c6fd2807SJeff Garzik /* issue bus reset */ 2993c6fd2807SJeff Garzik DPRINTK("about to softreset, devmask=%x\n", devmask); 2994c6fd2807SJeff Garzik err_mask = ata_bus_softreset(ap, devmask); 2995c6fd2807SJeff Garzik if (err_mask) { 2996c6fd2807SJeff Garzik ata_port_printk(ap, KERN_ERR, "SRST failed (err_mask=0x%x)\n", 2997c6fd2807SJeff Garzik err_mask); 2998c6fd2807SJeff Garzik return -EIO; 2999c6fd2807SJeff Garzik } 3000c6fd2807SJeff Garzik 3001c6fd2807SJeff Garzik /* determine by signature whether we have ATA or ATAPI devices */ 3002c6fd2807SJeff Garzik classes[0] = ata_dev_try_classify(ap, 0, &err); 3003c6fd2807SJeff Garzik if (slave_possible && err != 0x81) 3004c6fd2807SJeff Garzik classes[1] = ata_dev_try_classify(ap, 1, &err); 3005c6fd2807SJeff Garzik 3006c6fd2807SJeff Garzik out: 3007c6fd2807SJeff Garzik DPRINTK("EXIT, classes[0]=%u [1]=%u\n", classes[0], classes[1]); 3008c6fd2807SJeff Garzik return 0; 3009c6fd2807SJeff Garzik } 3010c6fd2807SJeff Garzik 3011c6fd2807SJeff Garzik /** 3012b6103f6dSTejun Heo * sata_port_hardreset - reset port via SATA phy reset 3013c6fd2807SJeff Garzik * @ap: port to reset 3014b6103f6dSTejun Heo * @timing: timing parameters { interval, duratinon, timeout } in msec 3015c6fd2807SJeff Garzik * 3016c6fd2807SJeff Garzik * SATA phy-reset host port using DET bits of SControl register. 3017c6fd2807SJeff Garzik * 3018c6fd2807SJeff Garzik * LOCKING: 3019c6fd2807SJeff Garzik * Kernel thread context (may sleep) 3020c6fd2807SJeff Garzik * 3021c6fd2807SJeff Garzik * RETURNS: 3022c6fd2807SJeff Garzik * 0 on success, -errno otherwise. 3023c6fd2807SJeff Garzik */ 3024b6103f6dSTejun Heo int sata_port_hardreset(struct ata_port *ap, const unsigned long *timing) 3025c6fd2807SJeff Garzik { 3026c6fd2807SJeff Garzik u32 scontrol; 3027c6fd2807SJeff Garzik int rc; 3028c6fd2807SJeff Garzik 3029c6fd2807SJeff Garzik DPRINTK("ENTER\n"); 3030c6fd2807SJeff Garzik 3031c6fd2807SJeff Garzik if (sata_set_spd_needed(ap)) { 3032c6fd2807SJeff Garzik /* SATA spec says nothing about how to reconfigure 3033c6fd2807SJeff Garzik * spd. To be on the safe side, turn off phy during 3034c6fd2807SJeff Garzik * reconfiguration. This works for at least ICH7 AHCI 3035c6fd2807SJeff Garzik * and Sil3124. 3036c6fd2807SJeff Garzik */ 3037c6fd2807SJeff Garzik if ((rc = sata_scr_read(ap, SCR_CONTROL, &scontrol))) 3038b6103f6dSTejun Heo goto out; 3039c6fd2807SJeff Garzik 3040cea0d336SJeff Garzik scontrol = (scontrol & 0x0f0) | 0x304; 3041c6fd2807SJeff Garzik 3042c6fd2807SJeff Garzik if ((rc = sata_scr_write(ap, SCR_CONTROL, scontrol))) 3043b6103f6dSTejun Heo goto out; 3044c6fd2807SJeff Garzik 3045c6fd2807SJeff Garzik sata_set_spd(ap); 3046c6fd2807SJeff Garzik } 3047c6fd2807SJeff Garzik 3048c6fd2807SJeff Garzik /* issue phy wake/reset */ 3049c6fd2807SJeff Garzik if ((rc = sata_scr_read(ap, SCR_CONTROL, &scontrol))) 3050b6103f6dSTejun Heo goto out; 3051c6fd2807SJeff Garzik 3052c6fd2807SJeff Garzik scontrol = (scontrol & 0x0f0) | 0x301; 3053c6fd2807SJeff Garzik 3054c6fd2807SJeff Garzik if ((rc = sata_scr_write_flush(ap, SCR_CONTROL, scontrol))) 3055b6103f6dSTejun Heo goto out; 3056c6fd2807SJeff Garzik 3057c6fd2807SJeff Garzik /* Couldn't find anything in SATA I/II specs, but AHCI-1.1 3058c6fd2807SJeff Garzik * 10.4.2 says at least 1 ms. 3059c6fd2807SJeff Garzik */ 3060c6fd2807SJeff Garzik msleep(1); 3061c6fd2807SJeff Garzik 3062c6fd2807SJeff Garzik /* bring phy back */ 3063b6103f6dSTejun Heo rc = sata_phy_resume(ap, timing); 3064b6103f6dSTejun Heo out: 3065b6103f6dSTejun Heo DPRINTK("EXIT, rc=%d\n", rc); 3066b6103f6dSTejun Heo return rc; 3067b6103f6dSTejun Heo } 3068b6103f6dSTejun Heo 3069b6103f6dSTejun Heo /** 3070b6103f6dSTejun Heo * sata_std_hardreset - reset host port via SATA phy reset 3071b6103f6dSTejun Heo * @ap: port to reset 3072b6103f6dSTejun Heo * @class: resulting class of attached device 3073b6103f6dSTejun Heo * 3074b6103f6dSTejun Heo * SATA phy-reset host port using DET bits of SControl register, 3075b6103f6dSTejun Heo * wait for !BSY and classify the attached device. 3076b6103f6dSTejun Heo * 3077b6103f6dSTejun Heo * LOCKING: 3078b6103f6dSTejun Heo * Kernel thread context (may sleep) 3079b6103f6dSTejun Heo * 3080b6103f6dSTejun Heo * RETURNS: 3081b6103f6dSTejun Heo * 0 on success, -errno otherwise. 3082b6103f6dSTejun Heo */ 3083b6103f6dSTejun Heo int sata_std_hardreset(struct ata_port *ap, unsigned int *class) 3084b6103f6dSTejun Heo { 3085b6103f6dSTejun Heo const unsigned long *timing = sata_ehc_deb_timing(&ap->eh_context); 3086b6103f6dSTejun Heo int rc; 3087b6103f6dSTejun Heo 3088b6103f6dSTejun Heo DPRINTK("ENTER\n"); 3089b6103f6dSTejun Heo 3090b6103f6dSTejun Heo /* do hardreset */ 3091b6103f6dSTejun Heo rc = sata_port_hardreset(ap, timing); 3092b6103f6dSTejun Heo if (rc) { 3093b6103f6dSTejun Heo ata_port_printk(ap, KERN_ERR, 3094b6103f6dSTejun Heo "COMRESET failed (errno=%d)\n", rc); 3095b6103f6dSTejun Heo return rc; 3096b6103f6dSTejun Heo } 3097c6fd2807SJeff Garzik 3098c6fd2807SJeff Garzik /* TODO: phy layer with polling, timeouts, etc. */ 3099c6fd2807SJeff Garzik if (ata_port_offline(ap)) { 3100c6fd2807SJeff Garzik *class = ATA_DEV_NONE; 3101c6fd2807SJeff Garzik DPRINTK("EXIT, link offline\n"); 3102c6fd2807SJeff Garzik return 0; 3103c6fd2807SJeff Garzik } 3104c6fd2807SJeff Garzik 310534fee227STejun Heo /* wait a while before checking status, see SRST for more info */ 310634fee227STejun Heo msleep(150); 310734fee227STejun Heo 3108c6fd2807SJeff Garzik if (ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT)) { 3109c6fd2807SJeff Garzik ata_port_printk(ap, KERN_ERR, 3110c6fd2807SJeff Garzik "COMRESET failed (device not ready)\n"); 3111c6fd2807SJeff Garzik return -EIO; 3112c6fd2807SJeff Garzik } 3113c6fd2807SJeff Garzik 3114c6fd2807SJeff Garzik ap->ops->dev_select(ap, 0); /* probably unnecessary */ 3115c6fd2807SJeff Garzik 3116c6fd2807SJeff Garzik *class = ata_dev_try_classify(ap, 0, NULL); 3117c6fd2807SJeff Garzik 3118c6fd2807SJeff Garzik DPRINTK("EXIT, class=%u\n", *class); 3119c6fd2807SJeff Garzik return 0; 3120c6fd2807SJeff Garzik } 3121c6fd2807SJeff Garzik 3122c6fd2807SJeff Garzik /** 3123c6fd2807SJeff Garzik * ata_std_postreset - standard postreset callback 3124c6fd2807SJeff Garzik * @ap: the target ata_port 3125c6fd2807SJeff Garzik * @classes: classes of attached devices 3126c6fd2807SJeff Garzik * 3127c6fd2807SJeff Garzik * This function is invoked after a successful reset. Note that 3128c6fd2807SJeff Garzik * the device might have been reset more than once using 3129c6fd2807SJeff Garzik * different reset methods before postreset is invoked. 3130c6fd2807SJeff Garzik * 3131c6fd2807SJeff Garzik * LOCKING: 3132c6fd2807SJeff Garzik * Kernel thread context (may sleep) 3133c6fd2807SJeff Garzik */ 3134c6fd2807SJeff Garzik void ata_std_postreset(struct ata_port *ap, unsigned int *classes) 3135c6fd2807SJeff Garzik { 3136c6fd2807SJeff Garzik u32 serror; 3137c6fd2807SJeff Garzik 3138c6fd2807SJeff Garzik DPRINTK("ENTER\n"); 3139c6fd2807SJeff Garzik 3140c6fd2807SJeff Garzik /* print link status */ 3141c6fd2807SJeff Garzik sata_print_link_status(ap); 3142c6fd2807SJeff Garzik 3143c6fd2807SJeff Garzik /* clear SError */ 3144c6fd2807SJeff Garzik if (sata_scr_read(ap, SCR_ERROR, &serror) == 0) 3145c6fd2807SJeff Garzik sata_scr_write(ap, SCR_ERROR, serror); 3146c6fd2807SJeff Garzik 3147c6fd2807SJeff Garzik /* re-enable interrupts */ 314883625006SAkira Iguchi if (!ap->ops->error_handler) 314983625006SAkira Iguchi ap->ops->irq_on(ap); 3150c6fd2807SJeff Garzik 3151c6fd2807SJeff Garzik /* is double-select really necessary? */ 3152c6fd2807SJeff Garzik if (classes[0] != ATA_DEV_NONE) 3153c6fd2807SJeff Garzik ap->ops->dev_select(ap, 1); 3154c6fd2807SJeff Garzik if (classes[1] != ATA_DEV_NONE) 3155c6fd2807SJeff Garzik ap->ops->dev_select(ap, 0); 3156c6fd2807SJeff Garzik 3157c6fd2807SJeff Garzik /* bail out if no device is present */ 3158c6fd2807SJeff Garzik if (classes[0] == ATA_DEV_NONE && classes[1] == ATA_DEV_NONE) { 3159c6fd2807SJeff Garzik DPRINTK("EXIT, no device\n"); 3160c6fd2807SJeff Garzik return; 3161c6fd2807SJeff Garzik } 3162c6fd2807SJeff Garzik 3163c6fd2807SJeff Garzik /* set up device control */ 31640d5ff566STejun Heo if (ap->ioaddr.ctl_addr) 31650d5ff566STejun Heo iowrite8(ap->ctl, ap->ioaddr.ctl_addr); 3166c6fd2807SJeff Garzik 3167c6fd2807SJeff Garzik DPRINTK("EXIT\n"); 3168c6fd2807SJeff Garzik } 3169c6fd2807SJeff Garzik 3170c6fd2807SJeff Garzik /** 3171c6fd2807SJeff Garzik * ata_dev_same_device - Determine whether new ID matches configured device 3172c6fd2807SJeff Garzik * @dev: device to compare against 3173c6fd2807SJeff Garzik * @new_class: class of the new device 3174c6fd2807SJeff Garzik * @new_id: IDENTIFY page of the new device 3175c6fd2807SJeff Garzik * 3176c6fd2807SJeff Garzik * Compare @new_class and @new_id against @dev and determine 3177c6fd2807SJeff Garzik * whether @dev is the device indicated by @new_class and 3178c6fd2807SJeff Garzik * @new_id. 3179c6fd2807SJeff Garzik * 3180c6fd2807SJeff Garzik * LOCKING: 3181c6fd2807SJeff Garzik * None. 3182c6fd2807SJeff Garzik * 3183c6fd2807SJeff Garzik * RETURNS: 3184c6fd2807SJeff Garzik * 1 if @dev matches @new_class and @new_id, 0 otherwise. 3185c6fd2807SJeff Garzik */ 3186c6fd2807SJeff Garzik static int ata_dev_same_device(struct ata_device *dev, unsigned int new_class, 3187c6fd2807SJeff Garzik const u16 *new_id) 3188c6fd2807SJeff Garzik { 3189c6fd2807SJeff Garzik const u16 *old_id = dev->id; 3190a0cf733bSTejun Heo unsigned char model[2][ATA_ID_PROD_LEN + 1]; 3191a0cf733bSTejun Heo unsigned char serial[2][ATA_ID_SERNO_LEN + 1]; 3192c6fd2807SJeff Garzik u64 new_n_sectors; 3193c6fd2807SJeff Garzik 3194c6fd2807SJeff Garzik if (dev->class != new_class) { 3195c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_INFO, "class mismatch %d != %d\n", 3196c6fd2807SJeff Garzik dev->class, new_class); 3197c6fd2807SJeff Garzik return 0; 3198c6fd2807SJeff Garzik } 3199c6fd2807SJeff Garzik 3200a0cf733bSTejun Heo ata_id_c_string(old_id, model[0], ATA_ID_PROD, sizeof(model[0])); 3201a0cf733bSTejun Heo ata_id_c_string(new_id, model[1], ATA_ID_PROD, sizeof(model[1])); 3202a0cf733bSTejun Heo ata_id_c_string(old_id, serial[0], ATA_ID_SERNO, sizeof(serial[0])); 3203a0cf733bSTejun Heo ata_id_c_string(new_id, serial[1], ATA_ID_SERNO, sizeof(serial[1])); 3204c6fd2807SJeff Garzik new_n_sectors = ata_id_n_sectors(new_id); 3205c6fd2807SJeff Garzik 3206c6fd2807SJeff Garzik if (strcmp(model[0], model[1])) { 3207c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_INFO, "model number mismatch " 3208c6fd2807SJeff Garzik "'%s' != '%s'\n", model[0], model[1]); 3209c6fd2807SJeff Garzik return 0; 3210c6fd2807SJeff Garzik } 3211c6fd2807SJeff Garzik 3212c6fd2807SJeff Garzik if (strcmp(serial[0], serial[1])) { 3213c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_INFO, "serial number mismatch " 3214c6fd2807SJeff Garzik "'%s' != '%s'\n", serial[0], serial[1]); 3215c6fd2807SJeff Garzik return 0; 3216c6fd2807SJeff Garzik } 3217c6fd2807SJeff Garzik 3218c6fd2807SJeff Garzik if (dev->class == ATA_DEV_ATA && dev->n_sectors != new_n_sectors) { 3219c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_INFO, "n_sectors mismatch " 3220c6fd2807SJeff Garzik "%llu != %llu\n", 3221c6fd2807SJeff Garzik (unsigned long long)dev->n_sectors, 3222c6fd2807SJeff Garzik (unsigned long long)new_n_sectors); 3223c6fd2807SJeff Garzik return 0; 3224c6fd2807SJeff Garzik } 3225c6fd2807SJeff Garzik 3226c6fd2807SJeff Garzik return 1; 3227c6fd2807SJeff Garzik } 3228c6fd2807SJeff Garzik 3229c6fd2807SJeff Garzik /** 3230c6fd2807SJeff Garzik * ata_dev_revalidate - Revalidate ATA device 3231c6fd2807SJeff Garzik * @dev: device to revalidate 3232bff04647STejun Heo * @readid_flags: read ID flags 3233c6fd2807SJeff Garzik * 3234c6fd2807SJeff Garzik * Re-read IDENTIFY page and make sure @dev is still attached to 3235c6fd2807SJeff Garzik * the port. 3236c6fd2807SJeff Garzik * 3237c6fd2807SJeff Garzik * LOCKING: 3238c6fd2807SJeff Garzik * Kernel thread context (may sleep) 3239c6fd2807SJeff Garzik * 3240c6fd2807SJeff Garzik * RETURNS: 3241c6fd2807SJeff Garzik * 0 on success, negative errno otherwise 3242c6fd2807SJeff Garzik */ 3243bff04647STejun Heo int ata_dev_revalidate(struct ata_device *dev, unsigned int readid_flags) 3244c6fd2807SJeff Garzik { 3245c6fd2807SJeff Garzik unsigned int class = dev->class; 3246c6fd2807SJeff Garzik u16 *id = (void *)dev->ap->sector_buf; 3247c6fd2807SJeff Garzik int rc; 3248c6fd2807SJeff Garzik 3249c6fd2807SJeff Garzik if (!ata_dev_enabled(dev)) { 3250c6fd2807SJeff Garzik rc = -ENODEV; 3251c6fd2807SJeff Garzik goto fail; 3252c6fd2807SJeff Garzik } 3253c6fd2807SJeff Garzik 3254c6fd2807SJeff Garzik /* read ID data */ 3255bff04647STejun Heo rc = ata_dev_read_id(dev, &class, readid_flags, id); 3256c6fd2807SJeff Garzik if (rc) 3257c6fd2807SJeff Garzik goto fail; 3258c6fd2807SJeff Garzik 3259c6fd2807SJeff Garzik /* is the device still there? */ 3260c6fd2807SJeff Garzik if (!ata_dev_same_device(dev, class, id)) { 3261c6fd2807SJeff Garzik rc = -ENODEV; 3262c6fd2807SJeff Garzik goto fail; 3263c6fd2807SJeff Garzik } 3264c6fd2807SJeff Garzik 3265c6fd2807SJeff Garzik memcpy(dev->id, id, sizeof(id[0]) * ATA_ID_WORDS); 3266c6fd2807SJeff Garzik 3267c6fd2807SJeff Garzik /* configure device according to the new ID */ 3268efdaedc4STejun Heo rc = ata_dev_configure(dev); 3269c6fd2807SJeff Garzik if (rc == 0) 3270c6fd2807SJeff Garzik return 0; 3271c6fd2807SJeff Garzik 3272c6fd2807SJeff Garzik fail: 3273c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_ERR, "revalidation failed (errno=%d)\n", rc); 3274c6fd2807SJeff Garzik return rc; 3275c6fd2807SJeff Garzik } 3276c6fd2807SJeff Garzik 32776919a0a6SAlan Cox struct ata_blacklist_entry { 32786919a0a6SAlan Cox const char *model_num; 32796919a0a6SAlan Cox const char *model_rev; 32806919a0a6SAlan Cox unsigned long horkage; 32816919a0a6SAlan Cox }; 32826919a0a6SAlan Cox 32836919a0a6SAlan Cox static const struct ata_blacklist_entry ata_device_blacklist [] = { 32846919a0a6SAlan Cox /* Devices with DMA related problems under Linux */ 32856919a0a6SAlan Cox { "WDC AC11000H", NULL, ATA_HORKAGE_NODMA }, 32866919a0a6SAlan Cox { "WDC AC22100H", NULL, ATA_HORKAGE_NODMA }, 32876919a0a6SAlan Cox { "WDC AC32500H", NULL, ATA_HORKAGE_NODMA }, 32886919a0a6SAlan Cox { "WDC AC33100H", NULL, ATA_HORKAGE_NODMA }, 32896919a0a6SAlan Cox { "WDC AC31600H", NULL, ATA_HORKAGE_NODMA }, 32906919a0a6SAlan Cox { "WDC AC32100H", "24.09P07", ATA_HORKAGE_NODMA }, 32916919a0a6SAlan Cox { "WDC AC23200L", "21.10N21", ATA_HORKAGE_NODMA }, 32926919a0a6SAlan Cox { "Compaq CRD-8241B", NULL, ATA_HORKAGE_NODMA }, 32936919a0a6SAlan Cox { "CRD-8400B", NULL, ATA_HORKAGE_NODMA }, 32946919a0a6SAlan Cox { "CRD-8480B", NULL, ATA_HORKAGE_NODMA }, 32956919a0a6SAlan Cox { "CRD-8482B", NULL, ATA_HORKAGE_NODMA }, 32966919a0a6SAlan Cox { "CRD-84", NULL, ATA_HORKAGE_NODMA }, 32976919a0a6SAlan Cox { "SanDisk SDP3B", NULL, ATA_HORKAGE_NODMA }, 32986919a0a6SAlan Cox { "SanDisk SDP3B-64", NULL, ATA_HORKAGE_NODMA }, 32996919a0a6SAlan Cox { "SANYO CD-ROM CRD", NULL, ATA_HORKAGE_NODMA }, 33006919a0a6SAlan Cox { "HITACHI CDR-8", NULL, ATA_HORKAGE_NODMA }, 33016919a0a6SAlan Cox { "HITACHI CDR-8335", NULL, ATA_HORKAGE_NODMA }, 33026919a0a6SAlan Cox { "HITACHI CDR-8435", NULL, ATA_HORKAGE_NODMA }, 33036919a0a6SAlan Cox { "Toshiba CD-ROM XM-6202B", NULL, ATA_HORKAGE_NODMA }, 33046919a0a6SAlan Cox { "TOSHIBA CD-ROM XM-1702BC", NULL, ATA_HORKAGE_NODMA }, 33056919a0a6SAlan Cox { "CD-532E-A", NULL, ATA_HORKAGE_NODMA }, 33066919a0a6SAlan Cox { "E-IDE CD-ROM CR-840",NULL, ATA_HORKAGE_NODMA }, 33076919a0a6SAlan Cox { "CD-ROM Drive/F5A", NULL, ATA_HORKAGE_NODMA }, 33086919a0a6SAlan Cox { "WPI CDD-820", NULL, ATA_HORKAGE_NODMA }, 33096919a0a6SAlan Cox { "SAMSUNG CD-ROM SC-148C", NULL, ATA_HORKAGE_NODMA }, 33106919a0a6SAlan Cox { "SAMSUNG CD-ROM SC", NULL, ATA_HORKAGE_NODMA }, 33116919a0a6SAlan Cox { "SanDisk SDP3B-64", NULL, ATA_HORKAGE_NODMA }, 33126919a0a6SAlan Cox { "ATAPI CD-ROM DRIVE 40X MAXIMUM",NULL,ATA_HORKAGE_NODMA }, 33136919a0a6SAlan Cox { "_NEC DV5800A", NULL, ATA_HORKAGE_NODMA }, 33146919a0a6SAlan Cox { "SAMSUNG CD-ROM SN-124","N001", ATA_HORKAGE_NODMA }, 33156919a0a6SAlan Cox 33166919a0a6SAlan Cox /* Devices we expect to fail diagnostics */ 33176919a0a6SAlan Cox 33186919a0a6SAlan Cox /* Devices where NCQ should be avoided */ 33196919a0a6SAlan Cox /* NCQ is slow */ 33206919a0a6SAlan Cox { "WDC WD740ADFD-00", NULL, ATA_HORKAGE_NONCQ }, 33216919a0a6SAlan Cox 33226919a0a6SAlan Cox /* Devices with NCQ limits */ 33236919a0a6SAlan Cox 33246919a0a6SAlan Cox /* End Marker */ 33256919a0a6SAlan Cox { } 3326c6fd2807SJeff Garzik }; 3327c6fd2807SJeff Garzik 33286919a0a6SAlan Cox unsigned long ata_device_blacklisted(const struct ata_device *dev) 3329c6fd2807SJeff Garzik { 33308bfa79fcSTejun Heo unsigned char model_num[ATA_ID_PROD_LEN + 1]; 33318bfa79fcSTejun Heo unsigned char model_rev[ATA_ID_FW_REV_LEN + 1]; 33326919a0a6SAlan Cox const struct ata_blacklist_entry *ad = ata_device_blacklist; 3333c6fd2807SJeff Garzik 33348bfa79fcSTejun Heo ata_id_c_string(dev->id, model_num, ATA_ID_PROD, sizeof(model_num)); 33358bfa79fcSTejun Heo ata_id_c_string(dev->id, model_rev, ATA_ID_FW_REV, sizeof(model_rev)); 3336c6fd2807SJeff Garzik 33376919a0a6SAlan Cox while (ad->model_num) { 33388bfa79fcSTejun Heo if (!strcmp(ad->model_num, model_num)) { 33396919a0a6SAlan Cox if (ad->model_rev == NULL) 33406919a0a6SAlan Cox return ad->horkage; 33418bfa79fcSTejun Heo if (!strcmp(ad->model_rev, model_rev)) 33426919a0a6SAlan Cox return ad->horkage; 3343c6fd2807SJeff Garzik } 33446919a0a6SAlan Cox ad++; 3345c6fd2807SJeff Garzik } 3346c6fd2807SJeff Garzik return 0; 3347c6fd2807SJeff Garzik } 3348c6fd2807SJeff Garzik 33496919a0a6SAlan Cox static int ata_dma_blacklisted(const struct ata_device *dev) 33506919a0a6SAlan Cox { 33516919a0a6SAlan Cox /* We don't support polling DMA. 33526919a0a6SAlan Cox * DMA blacklist those ATAPI devices with CDB-intr (and use PIO) 33536919a0a6SAlan Cox * if the LLDD handles only interrupts in the HSM_ST_LAST state. 33546919a0a6SAlan Cox */ 33556919a0a6SAlan Cox if ((dev->ap->flags & ATA_FLAG_PIO_POLLING) && 33566919a0a6SAlan Cox (dev->flags & ATA_DFLAG_CDB_INTR)) 33576919a0a6SAlan Cox return 1; 33586919a0a6SAlan Cox return (ata_device_blacklisted(dev) & ATA_HORKAGE_NODMA) ? 1 : 0; 33596919a0a6SAlan Cox } 33606919a0a6SAlan Cox 3361c6fd2807SJeff Garzik /** 3362c6fd2807SJeff Garzik * ata_dev_xfermask - Compute supported xfermask of the given device 3363c6fd2807SJeff Garzik * @dev: Device to compute xfermask for 3364c6fd2807SJeff Garzik * 3365c6fd2807SJeff Garzik * Compute supported xfermask of @dev and store it in 3366c6fd2807SJeff Garzik * dev->*_mask. This function is responsible for applying all 3367c6fd2807SJeff Garzik * known limits including host controller limits, device 3368c6fd2807SJeff Garzik * blacklist, etc... 3369c6fd2807SJeff Garzik * 3370c6fd2807SJeff Garzik * LOCKING: 3371c6fd2807SJeff Garzik * None. 3372c6fd2807SJeff Garzik */ 3373c6fd2807SJeff Garzik static void ata_dev_xfermask(struct ata_device *dev) 3374c6fd2807SJeff Garzik { 3375c6fd2807SJeff Garzik struct ata_port *ap = dev->ap; 3376cca3974eSJeff Garzik struct ata_host *host = ap->host; 3377c6fd2807SJeff Garzik unsigned long xfer_mask; 3378c6fd2807SJeff Garzik 3379c6fd2807SJeff Garzik /* controller modes available */ 3380c6fd2807SJeff Garzik xfer_mask = ata_pack_xfermask(ap->pio_mask, 3381c6fd2807SJeff Garzik ap->mwdma_mask, ap->udma_mask); 3382c6fd2807SJeff Garzik 3383c6fd2807SJeff Garzik /* Apply cable rule here. Don't apply it early because when 3384c6fd2807SJeff Garzik * we handle hot plug the cable type can itself change. 3385c6fd2807SJeff Garzik */ 3386c6fd2807SJeff Garzik if (ap->cbl == ATA_CBL_PATA40) 3387c6fd2807SJeff Garzik xfer_mask &= ~(0xF8 << ATA_SHIFT_UDMA); 3388fc085150SAlan Cox /* Apply drive side cable rule. Unknown or 80 pin cables reported 3389fc085150SAlan Cox * host side are checked drive side as well. Cases where we know a 3390fc085150SAlan Cox * 40wire cable is used safely for 80 are not checked here. 3391fc085150SAlan Cox */ 3392fc085150SAlan Cox if (ata_drive_40wire(dev->id) && (ap->cbl == ATA_CBL_PATA_UNK || ap->cbl == ATA_CBL_PATA80)) 3393fc085150SAlan Cox xfer_mask &= ~(0xF8 << ATA_SHIFT_UDMA); 3394fc085150SAlan Cox 3395c6fd2807SJeff Garzik 3396c6fd2807SJeff Garzik xfer_mask &= ata_pack_xfermask(dev->pio_mask, 3397c6fd2807SJeff Garzik dev->mwdma_mask, dev->udma_mask); 3398c6fd2807SJeff Garzik xfer_mask &= ata_id_xfermask(dev->id); 3399c6fd2807SJeff Garzik 3400b352e57dSAlan Cox /* 3401b352e57dSAlan Cox * CFA Advanced TrueIDE timings are not allowed on a shared 3402b352e57dSAlan Cox * cable 3403b352e57dSAlan Cox */ 3404b352e57dSAlan Cox if (ata_dev_pair(dev)) { 3405b352e57dSAlan Cox /* No PIO5 or PIO6 */ 3406b352e57dSAlan Cox xfer_mask &= ~(0x03 << (ATA_SHIFT_PIO + 5)); 3407b352e57dSAlan Cox /* No MWDMA3 or MWDMA 4 */ 3408b352e57dSAlan Cox xfer_mask &= ~(0x03 << (ATA_SHIFT_MWDMA + 3)); 3409b352e57dSAlan Cox } 3410b352e57dSAlan Cox 3411c6fd2807SJeff Garzik if (ata_dma_blacklisted(dev)) { 3412c6fd2807SJeff Garzik xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA); 3413c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_WARNING, 3414c6fd2807SJeff Garzik "device is on DMA blacklist, disabling DMA\n"); 3415c6fd2807SJeff Garzik } 3416c6fd2807SJeff Garzik 3417cca3974eSJeff Garzik if ((host->flags & ATA_HOST_SIMPLEX) && host->simplex_claimed) { 3418c6fd2807SJeff Garzik xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA); 3419c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_WARNING, "simplex DMA is claimed by " 3420c6fd2807SJeff Garzik "other device, disabling DMA\n"); 3421c6fd2807SJeff Garzik } 3422c6fd2807SJeff Garzik 3423c6fd2807SJeff Garzik if (ap->ops->mode_filter) 3424c6fd2807SJeff Garzik xfer_mask = ap->ops->mode_filter(ap, dev, xfer_mask); 3425c6fd2807SJeff Garzik 3426c6fd2807SJeff Garzik ata_unpack_xfermask(xfer_mask, &dev->pio_mask, 3427c6fd2807SJeff Garzik &dev->mwdma_mask, &dev->udma_mask); 3428c6fd2807SJeff Garzik } 3429c6fd2807SJeff Garzik 3430c6fd2807SJeff Garzik /** 3431c6fd2807SJeff Garzik * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command 3432c6fd2807SJeff Garzik * @dev: Device to which command will be sent 3433c6fd2807SJeff Garzik * 3434c6fd2807SJeff Garzik * Issue SET FEATURES - XFER MODE command to device @dev 3435c6fd2807SJeff Garzik * on port @ap. 3436c6fd2807SJeff Garzik * 3437c6fd2807SJeff Garzik * LOCKING: 3438c6fd2807SJeff Garzik * PCI/etc. bus probe sem. 3439c6fd2807SJeff Garzik * 3440c6fd2807SJeff Garzik * RETURNS: 3441c6fd2807SJeff Garzik * 0 on success, AC_ERR_* mask otherwise. 3442c6fd2807SJeff Garzik */ 3443c6fd2807SJeff Garzik 3444c6fd2807SJeff Garzik static unsigned int ata_dev_set_xfermode(struct ata_device *dev) 3445c6fd2807SJeff Garzik { 3446c6fd2807SJeff Garzik struct ata_taskfile tf; 3447c6fd2807SJeff Garzik unsigned int err_mask; 3448c6fd2807SJeff Garzik 3449c6fd2807SJeff Garzik /* set up set-features taskfile */ 3450c6fd2807SJeff Garzik DPRINTK("set features - xfer mode\n"); 3451c6fd2807SJeff Garzik 3452c6fd2807SJeff Garzik ata_tf_init(dev, &tf); 3453c6fd2807SJeff Garzik tf.command = ATA_CMD_SET_FEATURES; 3454c6fd2807SJeff Garzik tf.feature = SETFEATURES_XFER; 3455c6fd2807SJeff Garzik tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 3456c6fd2807SJeff Garzik tf.protocol = ATA_PROT_NODATA; 3457c6fd2807SJeff Garzik tf.nsect = dev->xfer_mode; 3458c6fd2807SJeff Garzik 3459c6fd2807SJeff Garzik err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0); 3460c6fd2807SJeff Garzik 3461c6fd2807SJeff Garzik DPRINTK("EXIT, err_mask=%x\n", err_mask); 3462c6fd2807SJeff Garzik return err_mask; 3463c6fd2807SJeff Garzik } 3464c6fd2807SJeff Garzik 3465c6fd2807SJeff Garzik /** 3466c6fd2807SJeff Garzik * ata_dev_init_params - Issue INIT DEV PARAMS command 3467c6fd2807SJeff Garzik * @dev: Device to which command will be sent 3468c6fd2807SJeff Garzik * @heads: Number of heads (taskfile parameter) 3469c6fd2807SJeff Garzik * @sectors: Number of sectors (taskfile parameter) 3470c6fd2807SJeff Garzik * 3471c6fd2807SJeff Garzik * LOCKING: 3472c6fd2807SJeff Garzik * Kernel thread context (may sleep) 3473c6fd2807SJeff Garzik * 3474c6fd2807SJeff Garzik * RETURNS: 3475c6fd2807SJeff Garzik * 0 on success, AC_ERR_* mask otherwise. 3476c6fd2807SJeff Garzik */ 3477c6fd2807SJeff Garzik static unsigned int ata_dev_init_params(struct ata_device *dev, 3478c6fd2807SJeff Garzik u16 heads, u16 sectors) 3479c6fd2807SJeff Garzik { 3480c6fd2807SJeff Garzik struct ata_taskfile tf; 3481c6fd2807SJeff Garzik unsigned int err_mask; 3482c6fd2807SJeff Garzik 3483c6fd2807SJeff Garzik /* Number of sectors per track 1-255. Number of heads 1-16 */ 3484c6fd2807SJeff Garzik if (sectors < 1 || sectors > 255 || heads < 1 || heads > 16) 3485c6fd2807SJeff Garzik return AC_ERR_INVALID; 3486c6fd2807SJeff Garzik 3487c6fd2807SJeff Garzik /* set up init dev params taskfile */ 3488c6fd2807SJeff Garzik DPRINTK("init dev params \n"); 3489c6fd2807SJeff Garzik 3490c6fd2807SJeff Garzik ata_tf_init(dev, &tf); 3491c6fd2807SJeff Garzik tf.command = ATA_CMD_INIT_DEV_PARAMS; 3492c6fd2807SJeff Garzik tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 3493c6fd2807SJeff Garzik tf.protocol = ATA_PROT_NODATA; 3494c6fd2807SJeff Garzik tf.nsect = sectors; 3495c6fd2807SJeff Garzik tf.device |= (heads - 1) & 0x0f; /* max head = num. of heads - 1 */ 3496c6fd2807SJeff Garzik 3497c6fd2807SJeff Garzik err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0); 3498c6fd2807SJeff Garzik 3499c6fd2807SJeff Garzik DPRINTK("EXIT, err_mask=%x\n", err_mask); 3500c6fd2807SJeff Garzik return err_mask; 3501c6fd2807SJeff Garzik } 3502c6fd2807SJeff Garzik 3503c6fd2807SJeff Garzik /** 3504c6fd2807SJeff Garzik * ata_sg_clean - Unmap DMA memory associated with command 3505c6fd2807SJeff Garzik * @qc: Command containing DMA memory to be released 3506c6fd2807SJeff Garzik * 3507c6fd2807SJeff Garzik * Unmap all mapped DMA memory associated with this command. 3508c6fd2807SJeff Garzik * 3509c6fd2807SJeff Garzik * LOCKING: 3510cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 3511c6fd2807SJeff Garzik */ 351270e6ad0cSTejun Heo void ata_sg_clean(struct ata_queued_cmd *qc) 3513c6fd2807SJeff Garzik { 3514c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 3515c6fd2807SJeff Garzik struct scatterlist *sg = qc->__sg; 3516c6fd2807SJeff Garzik int dir = qc->dma_dir; 3517c6fd2807SJeff Garzik void *pad_buf = NULL; 3518c6fd2807SJeff Garzik 3519c6fd2807SJeff Garzik WARN_ON(!(qc->flags & ATA_QCFLAG_DMAMAP)); 3520c6fd2807SJeff Garzik WARN_ON(sg == NULL); 3521c6fd2807SJeff Garzik 3522c6fd2807SJeff Garzik if (qc->flags & ATA_QCFLAG_SINGLE) 3523c6fd2807SJeff Garzik WARN_ON(qc->n_elem > 1); 3524c6fd2807SJeff Garzik 3525c6fd2807SJeff Garzik VPRINTK("unmapping %u sg elements\n", qc->n_elem); 3526c6fd2807SJeff Garzik 3527c6fd2807SJeff Garzik /* if we padded the buffer out to 32-bit bound, and data 3528c6fd2807SJeff Garzik * xfer direction is from-device, we must copy from the 3529c6fd2807SJeff Garzik * pad buffer back into the supplied buffer 3530c6fd2807SJeff Garzik */ 3531c6fd2807SJeff Garzik if (qc->pad_len && !(qc->tf.flags & ATA_TFLAG_WRITE)) 3532c6fd2807SJeff Garzik pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ); 3533c6fd2807SJeff Garzik 3534c6fd2807SJeff Garzik if (qc->flags & ATA_QCFLAG_SG) { 3535c6fd2807SJeff Garzik if (qc->n_elem) 3536c6fd2807SJeff Garzik dma_unmap_sg(ap->dev, sg, qc->n_elem, dir); 3537c6fd2807SJeff Garzik /* restore last sg */ 3538c6fd2807SJeff Garzik sg[qc->orig_n_elem - 1].length += qc->pad_len; 3539c6fd2807SJeff Garzik if (pad_buf) { 3540c6fd2807SJeff Garzik struct scatterlist *psg = &qc->pad_sgent; 3541c6fd2807SJeff Garzik void *addr = kmap_atomic(psg->page, KM_IRQ0); 3542c6fd2807SJeff Garzik memcpy(addr + psg->offset, pad_buf, qc->pad_len); 3543c6fd2807SJeff Garzik kunmap_atomic(addr, KM_IRQ0); 3544c6fd2807SJeff Garzik } 3545c6fd2807SJeff Garzik } else { 3546c6fd2807SJeff Garzik if (qc->n_elem) 3547c6fd2807SJeff Garzik dma_unmap_single(ap->dev, 3548c6fd2807SJeff Garzik sg_dma_address(&sg[0]), sg_dma_len(&sg[0]), 3549c6fd2807SJeff Garzik dir); 3550c6fd2807SJeff Garzik /* restore sg */ 3551c6fd2807SJeff Garzik sg->length += qc->pad_len; 3552c6fd2807SJeff Garzik if (pad_buf) 3553c6fd2807SJeff Garzik memcpy(qc->buf_virt + sg->length - qc->pad_len, 3554c6fd2807SJeff Garzik pad_buf, qc->pad_len); 3555c6fd2807SJeff Garzik } 3556c6fd2807SJeff Garzik 3557c6fd2807SJeff Garzik qc->flags &= ~ATA_QCFLAG_DMAMAP; 3558c6fd2807SJeff Garzik qc->__sg = NULL; 3559c6fd2807SJeff Garzik } 3560c6fd2807SJeff Garzik 3561c6fd2807SJeff Garzik /** 3562c6fd2807SJeff Garzik * ata_fill_sg - Fill PCI IDE PRD table 3563c6fd2807SJeff Garzik * @qc: Metadata associated with taskfile to be transferred 3564c6fd2807SJeff Garzik * 3565c6fd2807SJeff Garzik * Fill PCI IDE PRD (scatter-gather) table with segments 3566c6fd2807SJeff Garzik * associated with the current disk command. 3567c6fd2807SJeff Garzik * 3568c6fd2807SJeff Garzik * LOCKING: 3569cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 3570c6fd2807SJeff Garzik * 3571c6fd2807SJeff Garzik */ 3572c6fd2807SJeff Garzik static void ata_fill_sg(struct ata_queued_cmd *qc) 3573c6fd2807SJeff Garzik { 3574c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 3575c6fd2807SJeff Garzik struct scatterlist *sg; 3576c6fd2807SJeff Garzik unsigned int idx; 3577c6fd2807SJeff Garzik 3578c6fd2807SJeff Garzik WARN_ON(qc->__sg == NULL); 3579c6fd2807SJeff Garzik WARN_ON(qc->n_elem == 0 && qc->pad_len == 0); 3580c6fd2807SJeff Garzik 3581c6fd2807SJeff Garzik idx = 0; 3582c6fd2807SJeff Garzik ata_for_each_sg(sg, qc) { 3583c6fd2807SJeff Garzik u32 addr, offset; 3584c6fd2807SJeff Garzik u32 sg_len, len; 3585c6fd2807SJeff Garzik 3586c6fd2807SJeff Garzik /* determine if physical DMA addr spans 64K boundary. 3587c6fd2807SJeff Garzik * Note h/w doesn't support 64-bit, so we unconditionally 3588c6fd2807SJeff Garzik * truncate dma_addr_t to u32. 3589c6fd2807SJeff Garzik */ 3590c6fd2807SJeff Garzik addr = (u32) sg_dma_address(sg); 3591c6fd2807SJeff Garzik sg_len = sg_dma_len(sg); 3592c6fd2807SJeff Garzik 3593c6fd2807SJeff Garzik while (sg_len) { 3594c6fd2807SJeff Garzik offset = addr & 0xffff; 3595c6fd2807SJeff Garzik len = sg_len; 3596c6fd2807SJeff Garzik if ((offset + sg_len) > 0x10000) 3597c6fd2807SJeff Garzik len = 0x10000 - offset; 3598c6fd2807SJeff Garzik 3599c6fd2807SJeff Garzik ap->prd[idx].addr = cpu_to_le32(addr); 3600c6fd2807SJeff Garzik ap->prd[idx].flags_len = cpu_to_le32(len & 0xffff); 3601c6fd2807SJeff Garzik VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", idx, addr, len); 3602c6fd2807SJeff Garzik 3603c6fd2807SJeff Garzik idx++; 3604c6fd2807SJeff Garzik sg_len -= len; 3605c6fd2807SJeff Garzik addr += len; 3606c6fd2807SJeff Garzik } 3607c6fd2807SJeff Garzik } 3608c6fd2807SJeff Garzik 3609c6fd2807SJeff Garzik if (idx) 3610c6fd2807SJeff Garzik ap->prd[idx - 1].flags_len |= cpu_to_le32(ATA_PRD_EOT); 3611c6fd2807SJeff Garzik } 3612c6fd2807SJeff Garzik /** 3613c6fd2807SJeff Garzik * ata_check_atapi_dma - Check whether ATAPI DMA can be supported 3614c6fd2807SJeff Garzik * @qc: Metadata associated with taskfile to check 3615c6fd2807SJeff Garzik * 3616c6fd2807SJeff Garzik * Allow low-level driver to filter ATA PACKET commands, returning 3617c6fd2807SJeff Garzik * a status indicating whether or not it is OK to use DMA for the 3618c6fd2807SJeff Garzik * supplied PACKET command. 3619c6fd2807SJeff Garzik * 3620c6fd2807SJeff Garzik * LOCKING: 3621cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 3622c6fd2807SJeff Garzik * 3623c6fd2807SJeff Garzik * RETURNS: 0 when ATAPI DMA can be used 3624c6fd2807SJeff Garzik * nonzero otherwise 3625c6fd2807SJeff Garzik */ 3626c6fd2807SJeff Garzik int ata_check_atapi_dma(struct ata_queued_cmd *qc) 3627c6fd2807SJeff Garzik { 3628c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 3629c6fd2807SJeff Garzik int rc = 0; /* Assume ATAPI DMA is OK by default */ 3630c6fd2807SJeff Garzik 3631c6fd2807SJeff Garzik if (ap->ops->check_atapi_dma) 3632c6fd2807SJeff Garzik rc = ap->ops->check_atapi_dma(qc); 3633c6fd2807SJeff Garzik 3634c6fd2807SJeff Garzik return rc; 3635c6fd2807SJeff Garzik } 3636c6fd2807SJeff Garzik /** 3637c6fd2807SJeff Garzik * ata_qc_prep - Prepare taskfile for submission 3638c6fd2807SJeff Garzik * @qc: Metadata associated with taskfile to be prepared 3639c6fd2807SJeff Garzik * 3640c6fd2807SJeff Garzik * Prepare ATA taskfile for submission. 3641c6fd2807SJeff Garzik * 3642c6fd2807SJeff Garzik * LOCKING: 3643cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 3644c6fd2807SJeff Garzik */ 3645c6fd2807SJeff Garzik void ata_qc_prep(struct ata_queued_cmd *qc) 3646c6fd2807SJeff Garzik { 3647c6fd2807SJeff Garzik if (!(qc->flags & ATA_QCFLAG_DMAMAP)) 3648c6fd2807SJeff Garzik return; 3649c6fd2807SJeff Garzik 3650c6fd2807SJeff Garzik ata_fill_sg(qc); 3651c6fd2807SJeff Garzik } 3652c6fd2807SJeff Garzik 3653c6fd2807SJeff Garzik void ata_noop_qc_prep(struct ata_queued_cmd *qc) { } 3654c6fd2807SJeff Garzik 3655c6fd2807SJeff Garzik /** 3656c6fd2807SJeff Garzik * ata_sg_init_one - Associate command with memory buffer 3657c6fd2807SJeff Garzik * @qc: Command to be associated 3658c6fd2807SJeff Garzik * @buf: Memory buffer 3659c6fd2807SJeff Garzik * @buflen: Length of memory buffer, in bytes. 3660c6fd2807SJeff Garzik * 3661c6fd2807SJeff Garzik * Initialize the data-related elements of queued_cmd @qc 3662c6fd2807SJeff Garzik * to point to a single memory buffer, @buf of byte length @buflen. 3663c6fd2807SJeff Garzik * 3664c6fd2807SJeff Garzik * LOCKING: 3665cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 3666c6fd2807SJeff Garzik */ 3667c6fd2807SJeff Garzik 3668c6fd2807SJeff Garzik void ata_sg_init_one(struct ata_queued_cmd *qc, void *buf, unsigned int buflen) 3669c6fd2807SJeff Garzik { 3670c6fd2807SJeff Garzik qc->flags |= ATA_QCFLAG_SINGLE; 3671c6fd2807SJeff Garzik 3672c6fd2807SJeff Garzik qc->__sg = &qc->sgent; 3673c6fd2807SJeff Garzik qc->n_elem = 1; 3674c6fd2807SJeff Garzik qc->orig_n_elem = 1; 3675c6fd2807SJeff Garzik qc->buf_virt = buf; 3676c6fd2807SJeff Garzik qc->nbytes = buflen; 3677c6fd2807SJeff Garzik 367861c0596cSTejun Heo sg_init_one(&qc->sgent, buf, buflen); 3679c6fd2807SJeff Garzik } 3680c6fd2807SJeff Garzik 3681c6fd2807SJeff Garzik /** 3682c6fd2807SJeff Garzik * ata_sg_init - Associate command with scatter-gather table. 3683c6fd2807SJeff Garzik * @qc: Command to be associated 3684c6fd2807SJeff Garzik * @sg: Scatter-gather table. 3685c6fd2807SJeff Garzik * @n_elem: Number of elements in s/g table. 3686c6fd2807SJeff Garzik * 3687c6fd2807SJeff Garzik * Initialize the data-related elements of queued_cmd @qc 3688c6fd2807SJeff Garzik * to point to a scatter-gather table @sg, containing @n_elem 3689c6fd2807SJeff Garzik * elements. 3690c6fd2807SJeff Garzik * 3691c6fd2807SJeff Garzik * LOCKING: 3692cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 3693c6fd2807SJeff Garzik */ 3694c6fd2807SJeff Garzik 3695c6fd2807SJeff Garzik void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg, 3696c6fd2807SJeff Garzik unsigned int n_elem) 3697c6fd2807SJeff Garzik { 3698c6fd2807SJeff Garzik qc->flags |= ATA_QCFLAG_SG; 3699c6fd2807SJeff Garzik qc->__sg = sg; 3700c6fd2807SJeff Garzik qc->n_elem = n_elem; 3701c6fd2807SJeff Garzik qc->orig_n_elem = n_elem; 3702c6fd2807SJeff Garzik } 3703c6fd2807SJeff Garzik 3704c6fd2807SJeff Garzik /** 3705c6fd2807SJeff Garzik * ata_sg_setup_one - DMA-map the memory buffer associated with a command. 3706c6fd2807SJeff Garzik * @qc: Command with memory buffer to be mapped. 3707c6fd2807SJeff Garzik * 3708c6fd2807SJeff Garzik * DMA-map the memory buffer associated with queued_cmd @qc. 3709c6fd2807SJeff Garzik * 3710c6fd2807SJeff Garzik * LOCKING: 3711cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 3712c6fd2807SJeff Garzik * 3713c6fd2807SJeff Garzik * RETURNS: 3714c6fd2807SJeff Garzik * Zero on success, negative on error. 3715c6fd2807SJeff Garzik */ 3716c6fd2807SJeff Garzik 3717c6fd2807SJeff Garzik static int ata_sg_setup_one(struct ata_queued_cmd *qc) 3718c6fd2807SJeff Garzik { 3719c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 3720c6fd2807SJeff Garzik int dir = qc->dma_dir; 3721c6fd2807SJeff Garzik struct scatterlist *sg = qc->__sg; 3722c6fd2807SJeff Garzik dma_addr_t dma_address; 3723c6fd2807SJeff Garzik int trim_sg = 0; 3724c6fd2807SJeff Garzik 3725c6fd2807SJeff Garzik /* we must lengthen transfers to end on a 32-bit boundary */ 3726c6fd2807SJeff Garzik qc->pad_len = sg->length & 3; 3727c6fd2807SJeff Garzik if (qc->pad_len) { 3728c6fd2807SJeff Garzik void *pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ); 3729c6fd2807SJeff Garzik struct scatterlist *psg = &qc->pad_sgent; 3730c6fd2807SJeff Garzik 3731c6fd2807SJeff Garzik WARN_ON(qc->dev->class != ATA_DEV_ATAPI); 3732c6fd2807SJeff Garzik 3733c6fd2807SJeff Garzik memset(pad_buf, 0, ATA_DMA_PAD_SZ); 3734c6fd2807SJeff Garzik 3735c6fd2807SJeff Garzik if (qc->tf.flags & ATA_TFLAG_WRITE) 3736c6fd2807SJeff Garzik memcpy(pad_buf, qc->buf_virt + sg->length - qc->pad_len, 3737c6fd2807SJeff Garzik qc->pad_len); 3738c6fd2807SJeff Garzik 3739c6fd2807SJeff Garzik sg_dma_address(psg) = ap->pad_dma + (qc->tag * ATA_DMA_PAD_SZ); 3740c6fd2807SJeff Garzik sg_dma_len(psg) = ATA_DMA_PAD_SZ; 3741c6fd2807SJeff Garzik /* trim sg */ 3742c6fd2807SJeff Garzik sg->length -= qc->pad_len; 3743c6fd2807SJeff Garzik if (sg->length == 0) 3744c6fd2807SJeff Garzik trim_sg = 1; 3745c6fd2807SJeff Garzik 3746c6fd2807SJeff Garzik DPRINTK("padding done, sg->length=%u pad_len=%u\n", 3747c6fd2807SJeff Garzik sg->length, qc->pad_len); 3748c6fd2807SJeff Garzik } 3749c6fd2807SJeff Garzik 3750c6fd2807SJeff Garzik if (trim_sg) { 3751c6fd2807SJeff Garzik qc->n_elem--; 3752c6fd2807SJeff Garzik goto skip_map; 3753c6fd2807SJeff Garzik } 3754c6fd2807SJeff Garzik 3755c6fd2807SJeff Garzik dma_address = dma_map_single(ap->dev, qc->buf_virt, 3756c6fd2807SJeff Garzik sg->length, dir); 3757c6fd2807SJeff Garzik if (dma_mapping_error(dma_address)) { 3758c6fd2807SJeff Garzik /* restore sg */ 3759c6fd2807SJeff Garzik sg->length += qc->pad_len; 3760c6fd2807SJeff Garzik return -1; 3761c6fd2807SJeff Garzik } 3762c6fd2807SJeff Garzik 3763c6fd2807SJeff Garzik sg_dma_address(sg) = dma_address; 3764c6fd2807SJeff Garzik sg_dma_len(sg) = sg->length; 3765c6fd2807SJeff Garzik 3766c6fd2807SJeff Garzik skip_map: 3767c6fd2807SJeff Garzik DPRINTK("mapped buffer of %d bytes for %s\n", sg_dma_len(sg), 3768c6fd2807SJeff Garzik qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read"); 3769c6fd2807SJeff Garzik 3770c6fd2807SJeff Garzik return 0; 3771c6fd2807SJeff Garzik } 3772c6fd2807SJeff Garzik 3773c6fd2807SJeff Garzik /** 3774c6fd2807SJeff Garzik * ata_sg_setup - DMA-map the scatter-gather table associated with a command. 3775c6fd2807SJeff Garzik * @qc: Command with scatter-gather table to be mapped. 3776c6fd2807SJeff Garzik * 3777c6fd2807SJeff Garzik * DMA-map the scatter-gather table associated with queued_cmd @qc. 3778c6fd2807SJeff Garzik * 3779c6fd2807SJeff Garzik * LOCKING: 3780cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 3781c6fd2807SJeff Garzik * 3782c6fd2807SJeff Garzik * RETURNS: 3783c6fd2807SJeff Garzik * Zero on success, negative on error. 3784c6fd2807SJeff Garzik * 3785c6fd2807SJeff Garzik */ 3786c6fd2807SJeff Garzik 3787c6fd2807SJeff Garzik static int ata_sg_setup(struct ata_queued_cmd *qc) 3788c6fd2807SJeff Garzik { 3789c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 3790c6fd2807SJeff Garzik struct scatterlist *sg = qc->__sg; 3791c6fd2807SJeff Garzik struct scatterlist *lsg = &sg[qc->n_elem - 1]; 3792c6fd2807SJeff Garzik int n_elem, pre_n_elem, dir, trim_sg = 0; 3793c6fd2807SJeff Garzik 3794c6fd2807SJeff Garzik VPRINTK("ENTER, ata%u\n", ap->id); 3795c6fd2807SJeff Garzik WARN_ON(!(qc->flags & ATA_QCFLAG_SG)); 3796c6fd2807SJeff Garzik 3797c6fd2807SJeff Garzik /* we must lengthen transfers to end on a 32-bit boundary */ 3798c6fd2807SJeff Garzik qc->pad_len = lsg->length & 3; 3799c6fd2807SJeff Garzik if (qc->pad_len) { 3800c6fd2807SJeff Garzik void *pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ); 3801c6fd2807SJeff Garzik struct scatterlist *psg = &qc->pad_sgent; 3802c6fd2807SJeff Garzik unsigned int offset; 3803c6fd2807SJeff Garzik 3804c6fd2807SJeff Garzik WARN_ON(qc->dev->class != ATA_DEV_ATAPI); 3805c6fd2807SJeff Garzik 3806c6fd2807SJeff Garzik memset(pad_buf, 0, ATA_DMA_PAD_SZ); 3807c6fd2807SJeff Garzik 3808c6fd2807SJeff Garzik /* 3809c6fd2807SJeff Garzik * psg->page/offset are used to copy to-be-written 3810c6fd2807SJeff Garzik * data in this function or read data in ata_sg_clean. 3811c6fd2807SJeff Garzik */ 3812c6fd2807SJeff Garzik offset = lsg->offset + lsg->length - qc->pad_len; 3813c6fd2807SJeff Garzik psg->page = nth_page(lsg->page, offset >> PAGE_SHIFT); 3814c6fd2807SJeff Garzik psg->offset = offset_in_page(offset); 3815c6fd2807SJeff Garzik 3816c6fd2807SJeff Garzik if (qc->tf.flags & ATA_TFLAG_WRITE) { 3817c6fd2807SJeff Garzik void *addr = kmap_atomic(psg->page, KM_IRQ0); 3818c6fd2807SJeff Garzik memcpy(pad_buf, addr + psg->offset, qc->pad_len); 3819c6fd2807SJeff Garzik kunmap_atomic(addr, KM_IRQ0); 3820c6fd2807SJeff Garzik } 3821c6fd2807SJeff Garzik 3822c6fd2807SJeff Garzik sg_dma_address(psg) = ap->pad_dma + (qc->tag * ATA_DMA_PAD_SZ); 3823c6fd2807SJeff Garzik sg_dma_len(psg) = ATA_DMA_PAD_SZ; 3824c6fd2807SJeff Garzik /* trim last sg */ 3825c6fd2807SJeff Garzik lsg->length -= qc->pad_len; 3826c6fd2807SJeff Garzik if (lsg->length == 0) 3827c6fd2807SJeff Garzik trim_sg = 1; 3828c6fd2807SJeff Garzik 3829c6fd2807SJeff Garzik DPRINTK("padding done, sg[%d].length=%u pad_len=%u\n", 3830c6fd2807SJeff Garzik qc->n_elem - 1, lsg->length, qc->pad_len); 3831c6fd2807SJeff Garzik } 3832c6fd2807SJeff Garzik 3833c6fd2807SJeff Garzik pre_n_elem = qc->n_elem; 3834c6fd2807SJeff Garzik if (trim_sg && pre_n_elem) 3835c6fd2807SJeff Garzik pre_n_elem--; 3836c6fd2807SJeff Garzik 3837c6fd2807SJeff Garzik if (!pre_n_elem) { 3838c6fd2807SJeff Garzik n_elem = 0; 3839c6fd2807SJeff Garzik goto skip_map; 3840c6fd2807SJeff Garzik } 3841c6fd2807SJeff Garzik 3842c6fd2807SJeff Garzik dir = qc->dma_dir; 3843c6fd2807SJeff Garzik n_elem = dma_map_sg(ap->dev, sg, pre_n_elem, dir); 3844c6fd2807SJeff Garzik if (n_elem < 1) { 3845c6fd2807SJeff Garzik /* restore last sg */ 3846c6fd2807SJeff Garzik lsg->length += qc->pad_len; 3847c6fd2807SJeff Garzik return -1; 3848c6fd2807SJeff Garzik } 3849c6fd2807SJeff Garzik 3850c6fd2807SJeff Garzik DPRINTK("%d sg elements mapped\n", n_elem); 3851c6fd2807SJeff Garzik 3852c6fd2807SJeff Garzik skip_map: 3853c6fd2807SJeff Garzik qc->n_elem = n_elem; 3854c6fd2807SJeff Garzik 3855c6fd2807SJeff Garzik return 0; 3856c6fd2807SJeff Garzik } 3857c6fd2807SJeff Garzik 3858c6fd2807SJeff Garzik /** 3859c6fd2807SJeff Garzik * swap_buf_le16 - swap halves of 16-bit words in place 3860c6fd2807SJeff Garzik * @buf: Buffer to swap 3861c6fd2807SJeff Garzik * @buf_words: Number of 16-bit words in buffer. 3862c6fd2807SJeff Garzik * 3863c6fd2807SJeff Garzik * Swap halves of 16-bit words if needed to convert from 3864c6fd2807SJeff Garzik * little-endian byte order to native cpu byte order, or 3865c6fd2807SJeff Garzik * vice-versa. 3866c6fd2807SJeff Garzik * 3867c6fd2807SJeff Garzik * LOCKING: 3868c6fd2807SJeff Garzik * Inherited from caller. 3869c6fd2807SJeff Garzik */ 3870c6fd2807SJeff Garzik void swap_buf_le16(u16 *buf, unsigned int buf_words) 3871c6fd2807SJeff Garzik { 3872c6fd2807SJeff Garzik #ifdef __BIG_ENDIAN 3873c6fd2807SJeff Garzik unsigned int i; 3874c6fd2807SJeff Garzik 3875c6fd2807SJeff Garzik for (i = 0; i < buf_words; i++) 3876c6fd2807SJeff Garzik buf[i] = le16_to_cpu(buf[i]); 3877c6fd2807SJeff Garzik #endif /* __BIG_ENDIAN */ 3878c6fd2807SJeff Garzik } 3879c6fd2807SJeff Garzik 3880c6fd2807SJeff Garzik /** 38810d5ff566STejun Heo * ata_data_xfer - Transfer data by PIO 3882c6fd2807SJeff Garzik * @adev: device to target 3883c6fd2807SJeff Garzik * @buf: data buffer 3884c6fd2807SJeff Garzik * @buflen: buffer length 3885c6fd2807SJeff Garzik * @write_data: read/write 3886c6fd2807SJeff Garzik * 3887c6fd2807SJeff Garzik * Transfer data from/to the device data register by PIO. 3888c6fd2807SJeff Garzik * 3889c6fd2807SJeff Garzik * LOCKING: 3890c6fd2807SJeff Garzik * Inherited from caller. 3891c6fd2807SJeff Garzik */ 38920d5ff566STejun Heo void ata_data_xfer(struct ata_device *adev, unsigned char *buf, 3893c6fd2807SJeff Garzik unsigned int buflen, int write_data) 3894c6fd2807SJeff Garzik { 3895c6fd2807SJeff Garzik struct ata_port *ap = adev->ap; 3896c6fd2807SJeff Garzik unsigned int words = buflen >> 1; 3897c6fd2807SJeff Garzik 3898c6fd2807SJeff Garzik /* Transfer multiple of 2 bytes */ 3899c6fd2807SJeff Garzik if (write_data) 39000d5ff566STejun Heo iowrite16_rep(ap->ioaddr.data_addr, buf, words); 3901c6fd2807SJeff Garzik else 39020d5ff566STejun Heo ioread16_rep(ap->ioaddr.data_addr, buf, words); 3903c6fd2807SJeff Garzik 3904c6fd2807SJeff Garzik /* Transfer trailing 1 byte, if any. */ 3905c6fd2807SJeff Garzik if (unlikely(buflen & 0x01)) { 3906c6fd2807SJeff Garzik u16 align_buf[1] = { 0 }; 3907c6fd2807SJeff Garzik unsigned char *trailing_buf = buf + buflen - 1; 3908c6fd2807SJeff Garzik 3909c6fd2807SJeff Garzik if (write_data) { 3910c6fd2807SJeff Garzik memcpy(align_buf, trailing_buf, 1); 39110d5ff566STejun Heo iowrite16(le16_to_cpu(align_buf[0]), ap->ioaddr.data_addr); 3912c6fd2807SJeff Garzik } else { 39130d5ff566STejun Heo align_buf[0] = cpu_to_le16(ioread16(ap->ioaddr.data_addr)); 3914c6fd2807SJeff Garzik memcpy(trailing_buf, align_buf, 1); 3915c6fd2807SJeff Garzik } 3916c6fd2807SJeff Garzik } 3917c6fd2807SJeff Garzik } 3918c6fd2807SJeff Garzik 3919c6fd2807SJeff Garzik /** 39200d5ff566STejun Heo * ata_data_xfer_noirq - Transfer data by PIO 3921c6fd2807SJeff Garzik * @adev: device to target 3922c6fd2807SJeff Garzik * @buf: data buffer 3923c6fd2807SJeff Garzik * @buflen: buffer length 3924c6fd2807SJeff Garzik * @write_data: read/write 3925c6fd2807SJeff Garzik * 3926c6fd2807SJeff Garzik * Transfer data from/to the device data register by PIO. Do the 3927c6fd2807SJeff Garzik * transfer with interrupts disabled. 3928c6fd2807SJeff Garzik * 3929c6fd2807SJeff Garzik * LOCKING: 3930c6fd2807SJeff Garzik * Inherited from caller. 3931c6fd2807SJeff Garzik */ 39320d5ff566STejun Heo void ata_data_xfer_noirq(struct ata_device *adev, unsigned char *buf, 3933c6fd2807SJeff Garzik unsigned int buflen, int write_data) 3934c6fd2807SJeff Garzik { 3935c6fd2807SJeff Garzik unsigned long flags; 3936c6fd2807SJeff Garzik local_irq_save(flags); 39370d5ff566STejun Heo ata_data_xfer(adev, buf, buflen, write_data); 3938c6fd2807SJeff Garzik local_irq_restore(flags); 3939c6fd2807SJeff Garzik } 3940c6fd2807SJeff Garzik 3941c6fd2807SJeff Garzik 3942c6fd2807SJeff Garzik /** 3943c6fd2807SJeff Garzik * ata_pio_sector - Transfer ATA_SECT_SIZE (512 bytes) of data. 3944c6fd2807SJeff Garzik * @qc: Command on going 3945c6fd2807SJeff Garzik * 3946c6fd2807SJeff Garzik * Transfer ATA_SECT_SIZE of data from/to the ATA device. 3947c6fd2807SJeff Garzik * 3948c6fd2807SJeff Garzik * LOCKING: 3949c6fd2807SJeff Garzik * Inherited from caller. 3950c6fd2807SJeff Garzik */ 3951c6fd2807SJeff Garzik 3952c6fd2807SJeff Garzik static void ata_pio_sector(struct ata_queued_cmd *qc) 3953c6fd2807SJeff Garzik { 3954c6fd2807SJeff Garzik int do_write = (qc->tf.flags & ATA_TFLAG_WRITE); 3955c6fd2807SJeff Garzik struct scatterlist *sg = qc->__sg; 3956c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 3957c6fd2807SJeff Garzik struct page *page; 3958c6fd2807SJeff Garzik unsigned int offset; 3959c6fd2807SJeff Garzik unsigned char *buf; 3960c6fd2807SJeff Garzik 3961726f0785STejun Heo if (qc->curbytes == qc->nbytes - ATA_SECT_SIZE) 3962c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_LAST; 3963c6fd2807SJeff Garzik 3964c6fd2807SJeff Garzik page = sg[qc->cursg].page; 3965726f0785STejun Heo offset = sg[qc->cursg].offset + qc->cursg_ofs; 3966c6fd2807SJeff Garzik 3967c6fd2807SJeff Garzik /* get the current page and offset */ 3968c6fd2807SJeff Garzik page = nth_page(page, (offset >> PAGE_SHIFT)); 3969c6fd2807SJeff Garzik offset %= PAGE_SIZE; 3970c6fd2807SJeff Garzik 3971c6fd2807SJeff Garzik DPRINTK("data %s\n", qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read"); 3972c6fd2807SJeff Garzik 3973c6fd2807SJeff Garzik if (PageHighMem(page)) { 3974c6fd2807SJeff Garzik unsigned long flags; 3975c6fd2807SJeff Garzik 3976c6fd2807SJeff Garzik /* FIXME: use a bounce buffer */ 3977c6fd2807SJeff Garzik local_irq_save(flags); 3978c6fd2807SJeff Garzik buf = kmap_atomic(page, KM_IRQ0); 3979c6fd2807SJeff Garzik 3980c6fd2807SJeff Garzik /* do the actual data transfer */ 3981c6fd2807SJeff Garzik ap->ops->data_xfer(qc->dev, buf + offset, ATA_SECT_SIZE, do_write); 3982c6fd2807SJeff Garzik 3983c6fd2807SJeff Garzik kunmap_atomic(buf, KM_IRQ0); 3984c6fd2807SJeff Garzik local_irq_restore(flags); 3985c6fd2807SJeff Garzik } else { 3986c6fd2807SJeff Garzik buf = page_address(page); 3987c6fd2807SJeff Garzik ap->ops->data_xfer(qc->dev, buf + offset, ATA_SECT_SIZE, do_write); 3988c6fd2807SJeff Garzik } 3989c6fd2807SJeff Garzik 3990726f0785STejun Heo qc->curbytes += ATA_SECT_SIZE; 3991726f0785STejun Heo qc->cursg_ofs += ATA_SECT_SIZE; 3992c6fd2807SJeff Garzik 3993726f0785STejun Heo if (qc->cursg_ofs == (&sg[qc->cursg])->length) { 3994c6fd2807SJeff Garzik qc->cursg++; 3995c6fd2807SJeff Garzik qc->cursg_ofs = 0; 3996c6fd2807SJeff Garzik } 3997c6fd2807SJeff Garzik } 3998c6fd2807SJeff Garzik 3999c6fd2807SJeff Garzik /** 4000c6fd2807SJeff Garzik * ata_pio_sectors - Transfer one or many 512-byte sectors. 4001c6fd2807SJeff Garzik * @qc: Command on going 4002c6fd2807SJeff Garzik * 4003c6fd2807SJeff Garzik * Transfer one or many ATA_SECT_SIZE of data from/to the 4004c6fd2807SJeff Garzik * ATA device for the DRQ request. 4005c6fd2807SJeff Garzik * 4006c6fd2807SJeff Garzik * LOCKING: 4007c6fd2807SJeff Garzik * Inherited from caller. 4008c6fd2807SJeff Garzik */ 4009c6fd2807SJeff Garzik 4010c6fd2807SJeff Garzik static void ata_pio_sectors(struct ata_queued_cmd *qc) 4011c6fd2807SJeff Garzik { 4012c6fd2807SJeff Garzik if (is_multi_taskfile(&qc->tf)) { 4013c6fd2807SJeff Garzik /* READ/WRITE MULTIPLE */ 4014c6fd2807SJeff Garzik unsigned int nsect; 4015c6fd2807SJeff Garzik 4016c6fd2807SJeff Garzik WARN_ON(qc->dev->multi_count == 0); 4017c6fd2807SJeff Garzik 4018726f0785STejun Heo nsect = min((qc->nbytes - qc->curbytes) / ATA_SECT_SIZE, 4019726f0785STejun Heo qc->dev->multi_count); 4020c6fd2807SJeff Garzik while (nsect--) 4021c6fd2807SJeff Garzik ata_pio_sector(qc); 4022c6fd2807SJeff Garzik } else 4023c6fd2807SJeff Garzik ata_pio_sector(qc); 4024c6fd2807SJeff Garzik } 4025c6fd2807SJeff Garzik 4026c6fd2807SJeff Garzik /** 4027c6fd2807SJeff Garzik * atapi_send_cdb - Write CDB bytes to hardware 4028c6fd2807SJeff Garzik * @ap: Port to which ATAPI device is attached. 4029c6fd2807SJeff Garzik * @qc: Taskfile currently active 4030c6fd2807SJeff Garzik * 4031c6fd2807SJeff Garzik * When device has indicated its readiness to accept 4032c6fd2807SJeff Garzik * a CDB, this function is called. Send the CDB. 4033c6fd2807SJeff Garzik * 4034c6fd2807SJeff Garzik * LOCKING: 4035c6fd2807SJeff Garzik * caller. 4036c6fd2807SJeff Garzik */ 4037c6fd2807SJeff Garzik 4038c6fd2807SJeff Garzik static void atapi_send_cdb(struct ata_port *ap, struct ata_queued_cmd *qc) 4039c6fd2807SJeff Garzik { 4040c6fd2807SJeff Garzik /* send SCSI cdb */ 4041c6fd2807SJeff Garzik DPRINTK("send cdb\n"); 4042c6fd2807SJeff Garzik WARN_ON(qc->dev->cdb_len < 12); 4043c6fd2807SJeff Garzik 4044c6fd2807SJeff Garzik ap->ops->data_xfer(qc->dev, qc->cdb, qc->dev->cdb_len, 1); 4045c6fd2807SJeff Garzik ata_altstatus(ap); /* flush */ 4046c6fd2807SJeff Garzik 4047c6fd2807SJeff Garzik switch (qc->tf.protocol) { 4048c6fd2807SJeff Garzik case ATA_PROT_ATAPI: 4049c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST; 4050c6fd2807SJeff Garzik break; 4051c6fd2807SJeff Garzik case ATA_PROT_ATAPI_NODATA: 4052c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_LAST; 4053c6fd2807SJeff Garzik break; 4054c6fd2807SJeff Garzik case ATA_PROT_ATAPI_DMA: 4055c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_LAST; 4056c6fd2807SJeff Garzik /* initiate bmdma */ 4057c6fd2807SJeff Garzik ap->ops->bmdma_start(qc); 4058c6fd2807SJeff Garzik break; 4059c6fd2807SJeff Garzik } 4060c6fd2807SJeff Garzik } 4061c6fd2807SJeff Garzik 4062c6fd2807SJeff Garzik /** 4063c6fd2807SJeff Garzik * __atapi_pio_bytes - Transfer data from/to the ATAPI device. 4064c6fd2807SJeff Garzik * @qc: Command on going 4065c6fd2807SJeff Garzik * @bytes: number of bytes 4066c6fd2807SJeff Garzik * 4067c6fd2807SJeff Garzik * Transfer Transfer data from/to the ATAPI device. 4068c6fd2807SJeff Garzik * 4069c6fd2807SJeff Garzik * LOCKING: 4070c6fd2807SJeff Garzik * Inherited from caller. 4071c6fd2807SJeff Garzik * 4072c6fd2807SJeff Garzik */ 4073c6fd2807SJeff Garzik 4074c6fd2807SJeff Garzik static void __atapi_pio_bytes(struct ata_queued_cmd *qc, unsigned int bytes) 4075c6fd2807SJeff Garzik { 4076c6fd2807SJeff Garzik int do_write = (qc->tf.flags & ATA_TFLAG_WRITE); 4077c6fd2807SJeff Garzik struct scatterlist *sg = qc->__sg; 4078c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 4079c6fd2807SJeff Garzik struct page *page; 4080c6fd2807SJeff Garzik unsigned char *buf; 4081c6fd2807SJeff Garzik unsigned int offset, count; 4082c6fd2807SJeff Garzik 4083c6fd2807SJeff Garzik if (qc->curbytes + bytes >= qc->nbytes) 4084c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_LAST; 4085c6fd2807SJeff Garzik 4086c6fd2807SJeff Garzik next_sg: 4087c6fd2807SJeff Garzik if (unlikely(qc->cursg >= qc->n_elem)) { 4088c6fd2807SJeff Garzik /* 4089c6fd2807SJeff Garzik * The end of qc->sg is reached and the device expects 4090c6fd2807SJeff Garzik * more data to transfer. In order not to overrun qc->sg 4091c6fd2807SJeff Garzik * and fulfill length specified in the byte count register, 4092c6fd2807SJeff Garzik * - for read case, discard trailing data from the device 4093c6fd2807SJeff Garzik * - for write case, padding zero data to the device 4094c6fd2807SJeff Garzik */ 4095c6fd2807SJeff Garzik u16 pad_buf[1] = { 0 }; 4096c6fd2807SJeff Garzik unsigned int words = bytes >> 1; 4097c6fd2807SJeff Garzik unsigned int i; 4098c6fd2807SJeff Garzik 4099c6fd2807SJeff Garzik if (words) /* warning if bytes > 1 */ 4100c6fd2807SJeff Garzik ata_dev_printk(qc->dev, KERN_WARNING, 4101c6fd2807SJeff Garzik "%u bytes trailing data\n", bytes); 4102c6fd2807SJeff Garzik 4103c6fd2807SJeff Garzik for (i = 0; i < words; i++) 4104c6fd2807SJeff Garzik ap->ops->data_xfer(qc->dev, (unsigned char*)pad_buf, 2, do_write); 4105c6fd2807SJeff Garzik 4106c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_LAST; 4107c6fd2807SJeff Garzik return; 4108c6fd2807SJeff Garzik } 4109c6fd2807SJeff Garzik 4110c6fd2807SJeff Garzik sg = &qc->__sg[qc->cursg]; 4111c6fd2807SJeff Garzik 4112c6fd2807SJeff Garzik page = sg->page; 4113c6fd2807SJeff Garzik offset = sg->offset + qc->cursg_ofs; 4114c6fd2807SJeff Garzik 4115c6fd2807SJeff Garzik /* get the current page and offset */ 4116c6fd2807SJeff Garzik page = nth_page(page, (offset >> PAGE_SHIFT)); 4117c6fd2807SJeff Garzik offset %= PAGE_SIZE; 4118c6fd2807SJeff Garzik 4119c6fd2807SJeff Garzik /* don't overrun current sg */ 4120c6fd2807SJeff Garzik count = min(sg->length - qc->cursg_ofs, bytes); 4121c6fd2807SJeff Garzik 4122c6fd2807SJeff Garzik /* don't cross page boundaries */ 4123c6fd2807SJeff Garzik count = min(count, (unsigned int)PAGE_SIZE - offset); 4124c6fd2807SJeff Garzik 4125c6fd2807SJeff Garzik DPRINTK("data %s\n", qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read"); 4126c6fd2807SJeff Garzik 4127c6fd2807SJeff Garzik if (PageHighMem(page)) { 4128c6fd2807SJeff Garzik unsigned long flags; 4129c6fd2807SJeff Garzik 4130c6fd2807SJeff Garzik /* FIXME: use bounce buffer */ 4131c6fd2807SJeff Garzik local_irq_save(flags); 4132c6fd2807SJeff Garzik buf = kmap_atomic(page, KM_IRQ0); 4133c6fd2807SJeff Garzik 4134c6fd2807SJeff Garzik /* do the actual data transfer */ 4135c6fd2807SJeff Garzik ap->ops->data_xfer(qc->dev, buf + offset, count, do_write); 4136c6fd2807SJeff Garzik 4137c6fd2807SJeff Garzik kunmap_atomic(buf, KM_IRQ0); 4138c6fd2807SJeff Garzik local_irq_restore(flags); 4139c6fd2807SJeff Garzik } else { 4140c6fd2807SJeff Garzik buf = page_address(page); 4141c6fd2807SJeff Garzik ap->ops->data_xfer(qc->dev, buf + offset, count, do_write); 4142c6fd2807SJeff Garzik } 4143c6fd2807SJeff Garzik 4144c6fd2807SJeff Garzik bytes -= count; 4145c6fd2807SJeff Garzik qc->curbytes += count; 4146c6fd2807SJeff Garzik qc->cursg_ofs += count; 4147c6fd2807SJeff Garzik 4148c6fd2807SJeff Garzik if (qc->cursg_ofs == sg->length) { 4149c6fd2807SJeff Garzik qc->cursg++; 4150c6fd2807SJeff Garzik qc->cursg_ofs = 0; 4151c6fd2807SJeff Garzik } 4152c6fd2807SJeff Garzik 4153c6fd2807SJeff Garzik if (bytes) 4154c6fd2807SJeff Garzik goto next_sg; 4155c6fd2807SJeff Garzik } 4156c6fd2807SJeff Garzik 4157c6fd2807SJeff Garzik /** 4158c6fd2807SJeff Garzik * atapi_pio_bytes - Transfer data from/to the ATAPI device. 4159c6fd2807SJeff Garzik * @qc: Command on going 4160c6fd2807SJeff Garzik * 4161c6fd2807SJeff Garzik * Transfer Transfer data from/to the ATAPI device. 4162c6fd2807SJeff Garzik * 4163c6fd2807SJeff Garzik * LOCKING: 4164c6fd2807SJeff Garzik * Inherited from caller. 4165c6fd2807SJeff Garzik */ 4166c6fd2807SJeff Garzik 4167c6fd2807SJeff Garzik static void atapi_pio_bytes(struct ata_queued_cmd *qc) 4168c6fd2807SJeff Garzik { 4169c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 4170c6fd2807SJeff Garzik struct ata_device *dev = qc->dev; 4171c6fd2807SJeff Garzik unsigned int ireason, bc_lo, bc_hi, bytes; 4172c6fd2807SJeff Garzik int i_write, do_write = (qc->tf.flags & ATA_TFLAG_WRITE) ? 1 : 0; 4173c6fd2807SJeff Garzik 4174c6fd2807SJeff Garzik /* Abuse qc->result_tf for temp storage of intermediate TF 4175c6fd2807SJeff Garzik * here to save some kernel stack usage. 4176c6fd2807SJeff Garzik * For normal completion, qc->result_tf is not relevant. For 4177c6fd2807SJeff Garzik * error, qc->result_tf is later overwritten by ata_qc_complete(). 4178c6fd2807SJeff Garzik * So, the correctness of qc->result_tf is not affected. 4179c6fd2807SJeff Garzik */ 4180c6fd2807SJeff Garzik ap->ops->tf_read(ap, &qc->result_tf); 4181c6fd2807SJeff Garzik ireason = qc->result_tf.nsect; 4182c6fd2807SJeff Garzik bc_lo = qc->result_tf.lbam; 4183c6fd2807SJeff Garzik bc_hi = qc->result_tf.lbah; 4184c6fd2807SJeff Garzik bytes = (bc_hi << 8) | bc_lo; 4185c6fd2807SJeff Garzik 4186c6fd2807SJeff Garzik /* shall be cleared to zero, indicating xfer of data */ 4187c6fd2807SJeff Garzik if (ireason & (1 << 0)) 4188c6fd2807SJeff Garzik goto err_out; 4189c6fd2807SJeff Garzik 4190c6fd2807SJeff Garzik /* make sure transfer direction matches expected */ 4191c6fd2807SJeff Garzik i_write = ((ireason & (1 << 1)) == 0) ? 1 : 0; 4192c6fd2807SJeff Garzik if (do_write != i_write) 4193c6fd2807SJeff Garzik goto err_out; 4194c6fd2807SJeff Garzik 4195c6fd2807SJeff Garzik VPRINTK("ata%u: xfering %d bytes\n", ap->id, bytes); 4196c6fd2807SJeff Garzik 4197c6fd2807SJeff Garzik __atapi_pio_bytes(qc, bytes); 4198c6fd2807SJeff Garzik 4199c6fd2807SJeff Garzik return; 4200c6fd2807SJeff Garzik 4201c6fd2807SJeff Garzik err_out: 4202c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_INFO, "ATAPI check failed\n"); 4203c6fd2807SJeff Garzik qc->err_mask |= AC_ERR_HSM; 4204c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_ERR; 4205c6fd2807SJeff Garzik } 4206c6fd2807SJeff Garzik 4207c6fd2807SJeff Garzik /** 4208c6fd2807SJeff Garzik * ata_hsm_ok_in_wq - Check if the qc can be handled in the workqueue. 4209c6fd2807SJeff Garzik * @ap: the target ata_port 4210c6fd2807SJeff Garzik * @qc: qc on going 4211c6fd2807SJeff Garzik * 4212c6fd2807SJeff Garzik * RETURNS: 4213c6fd2807SJeff Garzik * 1 if ok in workqueue, 0 otherwise. 4214c6fd2807SJeff Garzik */ 4215c6fd2807SJeff Garzik 4216c6fd2807SJeff Garzik static inline int ata_hsm_ok_in_wq(struct ata_port *ap, struct ata_queued_cmd *qc) 4217c6fd2807SJeff Garzik { 4218c6fd2807SJeff Garzik if (qc->tf.flags & ATA_TFLAG_POLLING) 4219c6fd2807SJeff Garzik return 1; 4220c6fd2807SJeff Garzik 4221c6fd2807SJeff Garzik if (ap->hsm_task_state == HSM_ST_FIRST) { 4222c6fd2807SJeff Garzik if (qc->tf.protocol == ATA_PROT_PIO && 4223c6fd2807SJeff Garzik (qc->tf.flags & ATA_TFLAG_WRITE)) 4224c6fd2807SJeff Garzik return 1; 4225c6fd2807SJeff Garzik 4226c6fd2807SJeff Garzik if (is_atapi_taskfile(&qc->tf) && 4227c6fd2807SJeff Garzik !(qc->dev->flags & ATA_DFLAG_CDB_INTR)) 4228c6fd2807SJeff Garzik return 1; 4229c6fd2807SJeff Garzik } 4230c6fd2807SJeff Garzik 4231c6fd2807SJeff Garzik return 0; 4232c6fd2807SJeff Garzik } 4233c6fd2807SJeff Garzik 4234c6fd2807SJeff Garzik /** 4235c6fd2807SJeff Garzik * ata_hsm_qc_complete - finish a qc running on standard HSM 4236c6fd2807SJeff Garzik * @qc: Command to complete 4237c6fd2807SJeff Garzik * @in_wq: 1 if called from workqueue, 0 otherwise 4238c6fd2807SJeff Garzik * 4239c6fd2807SJeff Garzik * Finish @qc which is running on standard HSM. 4240c6fd2807SJeff Garzik * 4241c6fd2807SJeff Garzik * LOCKING: 4242cca3974eSJeff Garzik * If @in_wq is zero, spin_lock_irqsave(host lock). 4243c6fd2807SJeff Garzik * Otherwise, none on entry and grabs host lock. 4244c6fd2807SJeff Garzik */ 4245c6fd2807SJeff Garzik static void ata_hsm_qc_complete(struct ata_queued_cmd *qc, int in_wq) 4246c6fd2807SJeff Garzik { 4247c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 4248c6fd2807SJeff Garzik unsigned long flags; 4249c6fd2807SJeff Garzik 4250c6fd2807SJeff Garzik if (ap->ops->error_handler) { 4251c6fd2807SJeff Garzik if (in_wq) { 4252c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 4253c6fd2807SJeff Garzik 4254cca3974eSJeff Garzik /* EH might have kicked in while host lock is 4255cca3974eSJeff Garzik * released. 4256c6fd2807SJeff Garzik */ 4257c6fd2807SJeff Garzik qc = ata_qc_from_tag(ap, qc->tag); 4258c6fd2807SJeff Garzik if (qc) { 4259c6fd2807SJeff Garzik if (likely(!(qc->err_mask & AC_ERR_HSM))) { 426083625006SAkira Iguchi ap->ops->irq_on(ap); 4261c6fd2807SJeff Garzik ata_qc_complete(qc); 4262c6fd2807SJeff Garzik } else 4263c6fd2807SJeff Garzik ata_port_freeze(ap); 4264c6fd2807SJeff Garzik } 4265c6fd2807SJeff Garzik 4266c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 4267c6fd2807SJeff Garzik } else { 4268c6fd2807SJeff Garzik if (likely(!(qc->err_mask & AC_ERR_HSM))) 4269c6fd2807SJeff Garzik ata_qc_complete(qc); 4270c6fd2807SJeff Garzik else 4271c6fd2807SJeff Garzik ata_port_freeze(ap); 4272c6fd2807SJeff Garzik } 4273c6fd2807SJeff Garzik } else { 4274c6fd2807SJeff Garzik if (in_wq) { 4275c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 427683625006SAkira Iguchi ap->ops->irq_on(ap); 4277c6fd2807SJeff Garzik ata_qc_complete(qc); 4278c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 4279c6fd2807SJeff Garzik } else 4280c6fd2807SJeff Garzik ata_qc_complete(qc); 4281c6fd2807SJeff Garzik } 4282c6fd2807SJeff Garzik 4283c6fd2807SJeff Garzik ata_altstatus(ap); /* flush */ 4284c6fd2807SJeff Garzik } 4285c6fd2807SJeff Garzik 4286c6fd2807SJeff Garzik /** 4287c6fd2807SJeff Garzik * ata_hsm_move - move the HSM to the next state. 4288c6fd2807SJeff Garzik * @ap: the target ata_port 4289c6fd2807SJeff Garzik * @qc: qc on going 4290c6fd2807SJeff Garzik * @status: current device status 4291c6fd2807SJeff Garzik * @in_wq: 1 if called from workqueue, 0 otherwise 4292c6fd2807SJeff Garzik * 4293c6fd2807SJeff Garzik * RETURNS: 4294c6fd2807SJeff Garzik * 1 when poll next status needed, 0 otherwise. 4295c6fd2807SJeff Garzik */ 4296c6fd2807SJeff Garzik int ata_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc, 4297c6fd2807SJeff Garzik u8 status, int in_wq) 4298c6fd2807SJeff Garzik { 4299c6fd2807SJeff Garzik unsigned long flags = 0; 4300c6fd2807SJeff Garzik int poll_next; 4301c6fd2807SJeff Garzik 4302c6fd2807SJeff Garzik WARN_ON((qc->flags & ATA_QCFLAG_ACTIVE) == 0); 4303c6fd2807SJeff Garzik 4304c6fd2807SJeff Garzik /* Make sure ata_qc_issue_prot() does not throw things 4305c6fd2807SJeff Garzik * like DMA polling into the workqueue. Notice that 4306c6fd2807SJeff Garzik * in_wq is not equivalent to (qc->tf.flags & ATA_TFLAG_POLLING). 4307c6fd2807SJeff Garzik */ 4308c6fd2807SJeff Garzik WARN_ON(in_wq != ata_hsm_ok_in_wq(ap, qc)); 4309c6fd2807SJeff Garzik 4310c6fd2807SJeff Garzik fsm_start: 4311c6fd2807SJeff Garzik DPRINTK("ata%u: protocol %d task_state %d (dev_stat 0x%X)\n", 4312c6fd2807SJeff Garzik ap->id, qc->tf.protocol, ap->hsm_task_state, status); 4313c6fd2807SJeff Garzik 4314c6fd2807SJeff Garzik switch (ap->hsm_task_state) { 4315c6fd2807SJeff Garzik case HSM_ST_FIRST: 4316c6fd2807SJeff Garzik /* Send first data block or PACKET CDB */ 4317c6fd2807SJeff Garzik 4318c6fd2807SJeff Garzik /* If polling, we will stay in the work queue after 4319c6fd2807SJeff Garzik * sending the data. Otherwise, interrupt handler 4320c6fd2807SJeff Garzik * takes over after sending the data. 4321c6fd2807SJeff Garzik */ 4322c6fd2807SJeff Garzik poll_next = (qc->tf.flags & ATA_TFLAG_POLLING); 4323c6fd2807SJeff Garzik 4324c6fd2807SJeff Garzik /* check device status */ 4325c6fd2807SJeff Garzik if (unlikely((status & ATA_DRQ) == 0)) { 4326c6fd2807SJeff Garzik /* handle BSY=0, DRQ=0 as error */ 4327c6fd2807SJeff Garzik if (likely(status & (ATA_ERR | ATA_DF))) 4328c6fd2807SJeff Garzik /* device stops HSM for abort/error */ 4329c6fd2807SJeff Garzik qc->err_mask |= AC_ERR_DEV; 4330c6fd2807SJeff Garzik else 4331c6fd2807SJeff Garzik /* HSM violation. Let EH handle this */ 4332c6fd2807SJeff Garzik qc->err_mask |= AC_ERR_HSM; 4333c6fd2807SJeff Garzik 4334c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_ERR; 4335c6fd2807SJeff Garzik goto fsm_start; 4336c6fd2807SJeff Garzik } 4337c6fd2807SJeff Garzik 4338c6fd2807SJeff Garzik /* Device should not ask for data transfer (DRQ=1) 4339c6fd2807SJeff Garzik * when it finds something wrong. 4340c6fd2807SJeff Garzik * We ignore DRQ here and stop the HSM by 4341c6fd2807SJeff Garzik * changing hsm_task_state to HSM_ST_ERR and 4342c6fd2807SJeff Garzik * let the EH abort the command or reset the device. 4343c6fd2807SJeff Garzik */ 4344c6fd2807SJeff Garzik if (unlikely(status & (ATA_ERR | ATA_DF))) { 4345c6fd2807SJeff Garzik printk(KERN_WARNING "ata%d: DRQ=1 with device error, dev_stat 0x%X\n", 4346c6fd2807SJeff Garzik ap->id, status); 4347c6fd2807SJeff Garzik qc->err_mask |= AC_ERR_HSM; 4348c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_ERR; 4349c6fd2807SJeff Garzik goto fsm_start; 4350c6fd2807SJeff Garzik } 4351c6fd2807SJeff Garzik 4352c6fd2807SJeff Garzik /* Send the CDB (atapi) or the first data block (ata pio out). 4353c6fd2807SJeff Garzik * During the state transition, interrupt handler shouldn't 4354c6fd2807SJeff Garzik * be invoked before the data transfer is complete and 4355c6fd2807SJeff Garzik * hsm_task_state is changed. Hence, the following locking. 4356c6fd2807SJeff Garzik */ 4357c6fd2807SJeff Garzik if (in_wq) 4358c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 4359c6fd2807SJeff Garzik 4360c6fd2807SJeff Garzik if (qc->tf.protocol == ATA_PROT_PIO) { 4361c6fd2807SJeff Garzik /* PIO data out protocol. 4362c6fd2807SJeff Garzik * send first data block. 4363c6fd2807SJeff Garzik */ 4364c6fd2807SJeff Garzik 4365c6fd2807SJeff Garzik /* ata_pio_sectors() might change the state 4366c6fd2807SJeff Garzik * to HSM_ST_LAST. so, the state is changed here 4367c6fd2807SJeff Garzik * before ata_pio_sectors(). 4368c6fd2807SJeff Garzik */ 4369c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST; 4370c6fd2807SJeff Garzik ata_pio_sectors(qc); 4371c6fd2807SJeff Garzik ata_altstatus(ap); /* flush */ 4372c6fd2807SJeff Garzik } else 4373c6fd2807SJeff Garzik /* send CDB */ 4374c6fd2807SJeff Garzik atapi_send_cdb(ap, qc); 4375c6fd2807SJeff Garzik 4376c6fd2807SJeff Garzik if (in_wq) 4377c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 4378c6fd2807SJeff Garzik 4379c6fd2807SJeff Garzik /* if polling, ata_pio_task() handles the rest. 4380c6fd2807SJeff Garzik * otherwise, interrupt handler takes over from here. 4381c6fd2807SJeff Garzik */ 4382c6fd2807SJeff Garzik break; 4383c6fd2807SJeff Garzik 4384c6fd2807SJeff Garzik case HSM_ST: 4385c6fd2807SJeff Garzik /* complete command or read/write the data register */ 4386c6fd2807SJeff Garzik if (qc->tf.protocol == ATA_PROT_ATAPI) { 4387c6fd2807SJeff Garzik /* ATAPI PIO protocol */ 4388c6fd2807SJeff Garzik if ((status & ATA_DRQ) == 0) { 4389c6fd2807SJeff Garzik /* No more data to transfer or device error. 4390c6fd2807SJeff Garzik * Device error will be tagged in HSM_ST_LAST. 4391c6fd2807SJeff Garzik */ 4392c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_LAST; 4393c6fd2807SJeff Garzik goto fsm_start; 4394c6fd2807SJeff Garzik } 4395c6fd2807SJeff Garzik 4396c6fd2807SJeff Garzik /* Device should not ask for data transfer (DRQ=1) 4397c6fd2807SJeff Garzik * when it finds something wrong. 4398c6fd2807SJeff Garzik * We ignore DRQ here and stop the HSM by 4399c6fd2807SJeff Garzik * changing hsm_task_state to HSM_ST_ERR and 4400c6fd2807SJeff Garzik * let the EH abort the command or reset the device. 4401c6fd2807SJeff Garzik */ 4402c6fd2807SJeff Garzik if (unlikely(status & (ATA_ERR | ATA_DF))) { 4403c6fd2807SJeff Garzik printk(KERN_WARNING "ata%d: DRQ=1 with device error, dev_stat 0x%X\n", 4404c6fd2807SJeff Garzik ap->id, status); 4405c6fd2807SJeff Garzik qc->err_mask |= AC_ERR_HSM; 4406c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_ERR; 4407c6fd2807SJeff Garzik goto fsm_start; 4408c6fd2807SJeff Garzik } 4409c6fd2807SJeff Garzik 4410c6fd2807SJeff Garzik atapi_pio_bytes(qc); 4411c6fd2807SJeff Garzik 4412c6fd2807SJeff Garzik if (unlikely(ap->hsm_task_state == HSM_ST_ERR)) 4413c6fd2807SJeff Garzik /* bad ireason reported by device */ 4414c6fd2807SJeff Garzik goto fsm_start; 4415c6fd2807SJeff Garzik 4416c6fd2807SJeff Garzik } else { 4417c6fd2807SJeff Garzik /* ATA PIO protocol */ 4418c6fd2807SJeff Garzik if (unlikely((status & ATA_DRQ) == 0)) { 4419c6fd2807SJeff Garzik /* handle BSY=0, DRQ=0 as error */ 4420c6fd2807SJeff Garzik if (likely(status & (ATA_ERR | ATA_DF))) 4421c6fd2807SJeff Garzik /* device stops HSM for abort/error */ 4422c6fd2807SJeff Garzik qc->err_mask |= AC_ERR_DEV; 4423c6fd2807SJeff Garzik else 442455a8e2c8STejun Heo /* HSM violation. Let EH handle this. 442555a8e2c8STejun Heo * Phantom devices also trigger this 442655a8e2c8STejun Heo * condition. Mark hint. 442755a8e2c8STejun Heo */ 442855a8e2c8STejun Heo qc->err_mask |= AC_ERR_HSM | 442955a8e2c8STejun Heo AC_ERR_NODEV_HINT; 4430c6fd2807SJeff Garzik 4431c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_ERR; 4432c6fd2807SJeff Garzik goto fsm_start; 4433c6fd2807SJeff Garzik } 4434c6fd2807SJeff Garzik 4435c6fd2807SJeff Garzik /* For PIO reads, some devices may ask for 4436c6fd2807SJeff Garzik * data transfer (DRQ=1) alone with ERR=1. 4437c6fd2807SJeff Garzik * We respect DRQ here and transfer one 4438c6fd2807SJeff Garzik * block of junk data before changing the 4439c6fd2807SJeff Garzik * hsm_task_state to HSM_ST_ERR. 4440c6fd2807SJeff Garzik * 4441c6fd2807SJeff Garzik * For PIO writes, ERR=1 DRQ=1 doesn't make 4442c6fd2807SJeff Garzik * sense since the data block has been 4443c6fd2807SJeff Garzik * transferred to the device. 4444c6fd2807SJeff Garzik */ 4445c6fd2807SJeff Garzik if (unlikely(status & (ATA_ERR | ATA_DF))) { 4446c6fd2807SJeff Garzik /* data might be corrputed */ 4447c6fd2807SJeff Garzik qc->err_mask |= AC_ERR_DEV; 4448c6fd2807SJeff Garzik 4449c6fd2807SJeff Garzik if (!(qc->tf.flags & ATA_TFLAG_WRITE)) { 4450c6fd2807SJeff Garzik ata_pio_sectors(qc); 4451c6fd2807SJeff Garzik ata_altstatus(ap); 4452c6fd2807SJeff Garzik status = ata_wait_idle(ap); 4453c6fd2807SJeff Garzik } 4454c6fd2807SJeff Garzik 4455c6fd2807SJeff Garzik if (status & (ATA_BUSY | ATA_DRQ)) 4456c6fd2807SJeff Garzik qc->err_mask |= AC_ERR_HSM; 4457c6fd2807SJeff Garzik 4458c6fd2807SJeff Garzik /* ata_pio_sectors() might change the 4459c6fd2807SJeff Garzik * state to HSM_ST_LAST. so, the state 4460c6fd2807SJeff Garzik * is changed after ata_pio_sectors(). 4461c6fd2807SJeff Garzik */ 4462c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_ERR; 4463c6fd2807SJeff Garzik goto fsm_start; 4464c6fd2807SJeff Garzik } 4465c6fd2807SJeff Garzik 4466c6fd2807SJeff Garzik ata_pio_sectors(qc); 4467c6fd2807SJeff Garzik 4468c6fd2807SJeff Garzik if (ap->hsm_task_state == HSM_ST_LAST && 4469c6fd2807SJeff Garzik (!(qc->tf.flags & ATA_TFLAG_WRITE))) { 4470c6fd2807SJeff Garzik /* all data read */ 4471c6fd2807SJeff Garzik ata_altstatus(ap); 4472c6fd2807SJeff Garzik status = ata_wait_idle(ap); 4473c6fd2807SJeff Garzik goto fsm_start; 4474c6fd2807SJeff Garzik } 4475c6fd2807SJeff Garzik } 4476c6fd2807SJeff Garzik 4477c6fd2807SJeff Garzik ata_altstatus(ap); /* flush */ 4478c6fd2807SJeff Garzik poll_next = 1; 4479c6fd2807SJeff Garzik break; 4480c6fd2807SJeff Garzik 4481c6fd2807SJeff Garzik case HSM_ST_LAST: 4482c6fd2807SJeff Garzik if (unlikely(!ata_ok(status))) { 4483c6fd2807SJeff Garzik qc->err_mask |= __ac_err_mask(status); 4484c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_ERR; 4485c6fd2807SJeff Garzik goto fsm_start; 4486c6fd2807SJeff Garzik } 4487c6fd2807SJeff Garzik 4488c6fd2807SJeff Garzik /* no more data to transfer */ 4489c6fd2807SJeff Garzik DPRINTK("ata%u: dev %u command complete, drv_stat 0x%x\n", 4490c6fd2807SJeff Garzik ap->id, qc->dev->devno, status); 4491c6fd2807SJeff Garzik 4492c6fd2807SJeff Garzik WARN_ON(qc->err_mask); 4493c6fd2807SJeff Garzik 4494c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_IDLE; 4495c6fd2807SJeff Garzik 4496c6fd2807SJeff Garzik /* complete taskfile transaction */ 4497c6fd2807SJeff Garzik ata_hsm_qc_complete(qc, in_wq); 4498c6fd2807SJeff Garzik 4499c6fd2807SJeff Garzik poll_next = 0; 4500c6fd2807SJeff Garzik break; 4501c6fd2807SJeff Garzik 4502c6fd2807SJeff Garzik case HSM_ST_ERR: 4503c6fd2807SJeff Garzik /* make sure qc->err_mask is available to 4504c6fd2807SJeff Garzik * know what's wrong and recover 4505c6fd2807SJeff Garzik */ 4506c6fd2807SJeff Garzik WARN_ON(qc->err_mask == 0); 4507c6fd2807SJeff Garzik 4508c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_IDLE; 4509c6fd2807SJeff Garzik 4510c6fd2807SJeff Garzik /* complete taskfile transaction */ 4511c6fd2807SJeff Garzik ata_hsm_qc_complete(qc, in_wq); 4512c6fd2807SJeff Garzik 4513c6fd2807SJeff Garzik poll_next = 0; 4514c6fd2807SJeff Garzik break; 4515c6fd2807SJeff Garzik default: 4516c6fd2807SJeff Garzik poll_next = 0; 4517c6fd2807SJeff Garzik BUG(); 4518c6fd2807SJeff Garzik } 4519c6fd2807SJeff Garzik 4520c6fd2807SJeff Garzik return poll_next; 4521c6fd2807SJeff Garzik } 4522c6fd2807SJeff Garzik 452365f27f38SDavid Howells static void ata_pio_task(struct work_struct *work) 4524c6fd2807SJeff Garzik { 452565f27f38SDavid Howells struct ata_port *ap = 452665f27f38SDavid Howells container_of(work, struct ata_port, port_task.work); 452765f27f38SDavid Howells struct ata_queued_cmd *qc = ap->port_task_data; 4528c6fd2807SJeff Garzik u8 status; 4529c6fd2807SJeff Garzik int poll_next; 4530c6fd2807SJeff Garzik 4531c6fd2807SJeff Garzik fsm_start: 4532c6fd2807SJeff Garzik WARN_ON(ap->hsm_task_state == HSM_ST_IDLE); 4533c6fd2807SJeff Garzik 4534c6fd2807SJeff Garzik /* 4535c6fd2807SJeff Garzik * This is purely heuristic. This is a fast path. 4536c6fd2807SJeff Garzik * Sometimes when we enter, BSY will be cleared in 4537c6fd2807SJeff Garzik * a chk-status or two. If not, the drive is probably seeking 4538c6fd2807SJeff Garzik * or something. Snooze for a couple msecs, then 4539c6fd2807SJeff Garzik * chk-status again. If still busy, queue delayed work. 4540c6fd2807SJeff Garzik */ 4541c6fd2807SJeff Garzik status = ata_busy_wait(ap, ATA_BUSY, 5); 4542c6fd2807SJeff Garzik if (status & ATA_BUSY) { 4543c6fd2807SJeff Garzik msleep(2); 4544c6fd2807SJeff Garzik status = ata_busy_wait(ap, ATA_BUSY, 10); 4545c6fd2807SJeff Garzik if (status & ATA_BUSY) { 4546c6fd2807SJeff Garzik ata_port_queue_task(ap, ata_pio_task, qc, ATA_SHORT_PAUSE); 4547c6fd2807SJeff Garzik return; 4548c6fd2807SJeff Garzik } 4549c6fd2807SJeff Garzik } 4550c6fd2807SJeff Garzik 4551c6fd2807SJeff Garzik /* move the HSM */ 4552c6fd2807SJeff Garzik poll_next = ata_hsm_move(ap, qc, status, 1); 4553c6fd2807SJeff Garzik 4554c6fd2807SJeff Garzik /* another command or interrupt handler 4555c6fd2807SJeff Garzik * may be running at this point. 4556c6fd2807SJeff Garzik */ 4557c6fd2807SJeff Garzik if (poll_next) 4558c6fd2807SJeff Garzik goto fsm_start; 4559c6fd2807SJeff Garzik } 4560c6fd2807SJeff Garzik 4561c6fd2807SJeff Garzik /** 4562c6fd2807SJeff Garzik * ata_qc_new - Request an available ATA command, for queueing 4563c6fd2807SJeff Garzik * @ap: Port associated with device @dev 4564c6fd2807SJeff Garzik * @dev: Device from whom we request an available command structure 4565c6fd2807SJeff Garzik * 4566c6fd2807SJeff Garzik * LOCKING: 4567c6fd2807SJeff Garzik * None. 4568c6fd2807SJeff Garzik */ 4569c6fd2807SJeff Garzik 4570c6fd2807SJeff Garzik static struct ata_queued_cmd *ata_qc_new(struct ata_port *ap) 4571c6fd2807SJeff Garzik { 4572c6fd2807SJeff Garzik struct ata_queued_cmd *qc = NULL; 4573c6fd2807SJeff Garzik unsigned int i; 4574c6fd2807SJeff Garzik 4575c6fd2807SJeff Garzik /* no command while frozen */ 4576c6fd2807SJeff Garzik if (unlikely(ap->pflags & ATA_PFLAG_FROZEN)) 4577c6fd2807SJeff Garzik return NULL; 4578c6fd2807SJeff Garzik 4579c6fd2807SJeff Garzik /* the last tag is reserved for internal command. */ 4580c6fd2807SJeff Garzik for (i = 0; i < ATA_MAX_QUEUE - 1; i++) 4581c6fd2807SJeff Garzik if (!test_and_set_bit(i, &ap->qc_allocated)) { 4582c6fd2807SJeff Garzik qc = __ata_qc_from_tag(ap, i); 4583c6fd2807SJeff Garzik break; 4584c6fd2807SJeff Garzik } 4585c6fd2807SJeff Garzik 4586c6fd2807SJeff Garzik if (qc) 4587c6fd2807SJeff Garzik qc->tag = i; 4588c6fd2807SJeff Garzik 4589c6fd2807SJeff Garzik return qc; 4590c6fd2807SJeff Garzik } 4591c6fd2807SJeff Garzik 4592c6fd2807SJeff Garzik /** 4593c6fd2807SJeff Garzik * ata_qc_new_init - Request an available ATA command, and initialize it 4594c6fd2807SJeff Garzik * @dev: Device from whom we request an available command structure 4595c6fd2807SJeff Garzik * 4596c6fd2807SJeff Garzik * LOCKING: 4597c6fd2807SJeff Garzik * None. 4598c6fd2807SJeff Garzik */ 4599c6fd2807SJeff Garzik 4600c6fd2807SJeff Garzik struct ata_queued_cmd *ata_qc_new_init(struct ata_device *dev) 4601c6fd2807SJeff Garzik { 4602c6fd2807SJeff Garzik struct ata_port *ap = dev->ap; 4603c6fd2807SJeff Garzik struct ata_queued_cmd *qc; 4604c6fd2807SJeff Garzik 4605c6fd2807SJeff Garzik qc = ata_qc_new(ap); 4606c6fd2807SJeff Garzik if (qc) { 4607c6fd2807SJeff Garzik qc->scsicmd = NULL; 4608c6fd2807SJeff Garzik qc->ap = ap; 4609c6fd2807SJeff Garzik qc->dev = dev; 4610c6fd2807SJeff Garzik 4611c6fd2807SJeff Garzik ata_qc_reinit(qc); 4612c6fd2807SJeff Garzik } 4613c6fd2807SJeff Garzik 4614c6fd2807SJeff Garzik return qc; 4615c6fd2807SJeff Garzik } 4616c6fd2807SJeff Garzik 4617c6fd2807SJeff Garzik /** 4618c6fd2807SJeff Garzik * ata_qc_free - free unused ata_queued_cmd 4619c6fd2807SJeff Garzik * @qc: Command to complete 4620c6fd2807SJeff Garzik * 4621c6fd2807SJeff Garzik * Designed to free unused ata_queued_cmd object 4622c6fd2807SJeff Garzik * in case something prevents using it. 4623c6fd2807SJeff Garzik * 4624c6fd2807SJeff Garzik * LOCKING: 4625cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 4626c6fd2807SJeff Garzik */ 4627c6fd2807SJeff Garzik void ata_qc_free(struct ata_queued_cmd *qc) 4628c6fd2807SJeff Garzik { 4629c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 4630c6fd2807SJeff Garzik unsigned int tag; 4631c6fd2807SJeff Garzik 4632c6fd2807SJeff Garzik WARN_ON(qc == NULL); /* ata_qc_from_tag _might_ return NULL */ 4633c6fd2807SJeff Garzik 4634c6fd2807SJeff Garzik qc->flags = 0; 4635c6fd2807SJeff Garzik tag = qc->tag; 4636c6fd2807SJeff Garzik if (likely(ata_tag_valid(tag))) { 4637c6fd2807SJeff Garzik qc->tag = ATA_TAG_POISON; 4638c6fd2807SJeff Garzik clear_bit(tag, &ap->qc_allocated); 4639c6fd2807SJeff Garzik } 4640c6fd2807SJeff Garzik } 4641c6fd2807SJeff Garzik 4642c6fd2807SJeff Garzik void __ata_qc_complete(struct ata_queued_cmd *qc) 4643c6fd2807SJeff Garzik { 4644c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 4645c6fd2807SJeff Garzik 4646c6fd2807SJeff Garzik WARN_ON(qc == NULL); /* ata_qc_from_tag _might_ return NULL */ 4647c6fd2807SJeff Garzik WARN_ON(!(qc->flags & ATA_QCFLAG_ACTIVE)); 4648c6fd2807SJeff Garzik 4649c6fd2807SJeff Garzik if (likely(qc->flags & ATA_QCFLAG_DMAMAP)) 4650c6fd2807SJeff Garzik ata_sg_clean(qc); 4651c6fd2807SJeff Garzik 4652c6fd2807SJeff Garzik /* command should be marked inactive atomically with qc completion */ 4653c6fd2807SJeff Garzik if (qc->tf.protocol == ATA_PROT_NCQ) 4654c6fd2807SJeff Garzik ap->sactive &= ~(1 << qc->tag); 4655c6fd2807SJeff Garzik else 4656c6fd2807SJeff Garzik ap->active_tag = ATA_TAG_POISON; 4657c6fd2807SJeff Garzik 4658c6fd2807SJeff Garzik /* atapi: mark qc as inactive to prevent the interrupt handler 4659c6fd2807SJeff Garzik * from completing the command twice later, before the error handler 4660c6fd2807SJeff Garzik * is called. (when rc != 0 and atapi request sense is needed) 4661c6fd2807SJeff Garzik */ 4662c6fd2807SJeff Garzik qc->flags &= ~ATA_QCFLAG_ACTIVE; 4663c6fd2807SJeff Garzik ap->qc_active &= ~(1 << qc->tag); 4664c6fd2807SJeff Garzik 4665c6fd2807SJeff Garzik /* call completion callback */ 4666c6fd2807SJeff Garzik qc->complete_fn(qc); 4667c6fd2807SJeff Garzik } 4668c6fd2807SJeff Garzik 466939599a53STejun Heo static void fill_result_tf(struct ata_queued_cmd *qc) 467039599a53STejun Heo { 467139599a53STejun Heo struct ata_port *ap = qc->ap; 467239599a53STejun Heo 467339599a53STejun Heo ap->ops->tf_read(ap, &qc->result_tf); 467439599a53STejun Heo qc->result_tf.flags = qc->tf.flags; 467539599a53STejun Heo } 467639599a53STejun Heo 4677c6fd2807SJeff Garzik /** 4678c6fd2807SJeff Garzik * ata_qc_complete - Complete an active ATA command 4679c6fd2807SJeff Garzik * @qc: Command to complete 4680c6fd2807SJeff Garzik * @err_mask: ATA Status register contents 4681c6fd2807SJeff Garzik * 4682c6fd2807SJeff Garzik * Indicate to the mid and upper layers that an ATA 4683c6fd2807SJeff Garzik * command has completed, with either an ok or not-ok status. 4684c6fd2807SJeff Garzik * 4685c6fd2807SJeff Garzik * LOCKING: 4686cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 4687c6fd2807SJeff Garzik */ 4688c6fd2807SJeff Garzik void ata_qc_complete(struct ata_queued_cmd *qc) 4689c6fd2807SJeff Garzik { 4690c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 4691c6fd2807SJeff Garzik 4692c6fd2807SJeff Garzik /* XXX: New EH and old EH use different mechanisms to 4693c6fd2807SJeff Garzik * synchronize EH with regular execution path. 4694c6fd2807SJeff Garzik * 4695c6fd2807SJeff Garzik * In new EH, a failed qc is marked with ATA_QCFLAG_FAILED. 4696c6fd2807SJeff Garzik * Normal execution path is responsible for not accessing a 4697c6fd2807SJeff Garzik * failed qc. libata core enforces the rule by returning NULL 4698c6fd2807SJeff Garzik * from ata_qc_from_tag() for failed qcs. 4699c6fd2807SJeff Garzik * 4700c6fd2807SJeff Garzik * Old EH depends on ata_qc_complete() nullifying completion 4701c6fd2807SJeff Garzik * requests if ATA_QCFLAG_EH_SCHEDULED is set. Old EH does 4702c6fd2807SJeff Garzik * not synchronize with interrupt handler. Only PIO task is 4703c6fd2807SJeff Garzik * taken care of. 4704c6fd2807SJeff Garzik */ 4705c6fd2807SJeff Garzik if (ap->ops->error_handler) { 4706c6fd2807SJeff Garzik WARN_ON(ap->pflags & ATA_PFLAG_FROZEN); 4707c6fd2807SJeff Garzik 4708c6fd2807SJeff Garzik if (unlikely(qc->err_mask)) 4709c6fd2807SJeff Garzik qc->flags |= ATA_QCFLAG_FAILED; 4710c6fd2807SJeff Garzik 4711c6fd2807SJeff Garzik if (unlikely(qc->flags & ATA_QCFLAG_FAILED)) { 4712c6fd2807SJeff Garzik if (!ata_tag_internal(qc->tag)) { 4713c6fd2807SJeff Garzik /* always fill result TF for failed qc */ 471439599a53STejun Heo fill_result_tf(qc); 4715c6fd2807SJeff Garzik ata_qc_schedule_eh(qc); 4716c6fd2807SJeff Garzik return; 4717c6fd2807SJeff Garzik } 4718c6fd2807SJeff Garzik } 4719c6fd2807SJeff Garzik 4720c6fd2807SJeff Garzik /* read result TF if requested */ 4721c6fd2807SJeff Garzik if (qc->flags & ATA_QCFLAG_RESULT_TF) 472239599a53STejun Heo fill_result_tf(qc); 4723c6fd2807SJeff Garzik 4724c6fd2807SJeff Garzik __ata_qc_complete(qc); 4725c6fd2807SJeff Garzik } else { 4726c6fd2807SJeff Garzik if (qc->flags & ATA_QCFLAG_EH_SCHEDULED) 4727c6fd2807SJeff Garzik return; 4728c6fd2807SJeff Garzik 4729c6fd2807SJeff Garzik /* read result TF if failed or requested */ 4730c6fd2807SJeff Garzik if (qc->err_mask || qc->flags & ATA_QCFLAG_RESULT_TF) 473139599a53STejun Heo fill_result_tf(qc); 4732c6fd2807SJeff Garzik 4733c6fd2807SJeff Garzik __ata_qc_complete(qc); 4734c6fd2807SJeff Garzik } 4735c6fd2807SJeff Garzik } 4736c6fd2807SJeff Garzik 4737c6fd2807SJeff Garzik /** 4738c6fd2807SJeff Garzik * ata_qc_complete_multiple - Complete multiple qcs successfully 4739c6fd2807SJeff Garzik * @ap: port in question 4740c6fd2807SJeff Garzik * @qc_active: new qc_active mask 4741c6fd2807SJeff Garzik * @finish_qc: LLDD callback invoked before completing a qc 4742c6fd2807SJeff Garzik * 4743c6fd2807SJeff Garzik * Complete in-flight commands. This functions is meant to be 4744c6fd2807SJeff Garzik * called from low-level driver's interrupt routine to complete 4745c6fd2807SJeff Garzik * requests normally. ap->qc_active and @qc_active is compared 4746c6fd2807SJeff Garzik * and commands are completed accordingly. 4747c6fd2807SJeff Garzik * 4748c6fd2807SJeff Garzik * LOCKING: 4749cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 4750c6fd2807SJeff Garzik * 4751c6fd2807SJeff Garzik * RETURNS: 4752c6fd2807SJeff Garzik * Number of completed commands on success, -errno otherwise. 4753c6fd2807SJeff Garzik */ 4754c6fd2807SJeff Garzik int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active, 4755c6fd2807SJeff Garzik void (*finish_qc)(struct ata_queued_cmd *)) 4756c6fd2807SJeff Garzik { 4757c6fd2807SJeff Garzik int nr_done = 0; 4758c6fd2807SJeff Garzik u32 done_mask; 4759c6fd2807SJeff Garzik int i; 4760c6fd2807SJeff Garzik 4761c6fd2807SJeff Garzik done_mask = ap->qc_active ^ qc_active; 4762c6fd2807SJeff Garzik 4763c6fd2807SJeff Garzik if (unlikely(done_mask & qc_active)) { 4764c6fd2807SJeff Garzik ata_port_printk(ap, KERN_ERR, "illegal qc_active transition " 4765c6fd2807SJeff Garzik "(%08x->%08x)\n", ap->qc_active, qc_active); 4766c6fd2807SJeff Garzik return -EINVAL; 4767c6fd2807SJeff Garzik } 4768c6fd2807SJeff Garzik 4769c6fd2807SJeff Garzik for (i = 0; i < ATA_MAX_QUEUE; i++) { 4770c6fd2807SJeff Garzik struct ata_queued_cmd *qc; 4771c6fd2807SJeff Garzik 4772c6fd2807SJeff Garzik if (!(done_mask & (1 << i))) 4773c6fd2807SJeff Garzik continue; 4774c6fd2807SJeff Garzik 4775c6fd2807SJeff Garzik if ((qc = ata_qc_from_tag(ap, i))) { 4776c6fd2807SJeff Garzik if (finish_qc) 4777c6fd2807SJeff Garzik finish_qc(qc); 4778c6fd2807SJeff Garzik ata_qc_complete(qc); 4779c6fd2807SJeff Garzik nr_done++; 4780c6fd2807SJeff Garzik } 4781c6fd2807SJeff Garzik } 4782c6fd2807SJeff Garzik 4783c6fd2807SJeff Garzik return nr_done; 4784c6fd2807SJeff Garzik } 4785c6fd2807SJeff Garzik 4786c6fd2807SJeff Garzik static inline int ata_should_dma_map(struct ata_queued_cmd *qc) 4787c6fd2807SJeff Garzik { 4788c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 4789c6fd2807SJeff Garzik 4790c6fd2807SJeff Garzik switch (qc->tf.protocol) { 4791c6fd2807SJeff Garzik case ATA_PROT_NCQ: 4792c6fd2807SJeff Garzik case ATA_PROT_DMA: 4793c6fd2807SJeff Garzik case ATA_PROT_ATAPI_DMA: 4794c6fd2807SJeff Garzik return 1; 4795c6fd2807SJeff Garzik 4796c6fd2807SJeff Garzik case ATA_PROT_ATAPI: 4797c6fd2807SJeff Garzik case ATA_PROT_PIO: 4798c6fd2807SJeff Garzik if (ap->flags & ATA_FLAG_PIO_DMA) 4799c6fd2807SJeff Garzik return 1; 4800c6fd2807SJeff Garzik 4801c6fd2807SJeff Garzik /* fall through */ 4802c6fd2807SJeff Garzik 4803c6fd2807SJeff Garzik default: 4804c6fd2807SJeff Garzik return 0; 4805c6fd2807SJeff Garzik } 4806c6fd2807SJeff Garzik 4807c6fd2807SJeff Garzik /* never reached */ 4808c6fd2807SJeff Garzik } 4809c6fd2807SJeff Garzik 4810c6fd2807SJeff Garzik /** 4811c6fd2807SJeff Garzik * ata_qc_issue - issue taskfile to device 4812c6fd2807SJeff Garzik * @qc: command to issue to device 4813c6fd2807SJeff Garzik * 4814c6fd2807SJeff Garzik * Prepare an ATA command to submission to device. 4815c6fd2807SJeff Garzik * This includes mapping the data into a DMA-able 4816c6fd2807SJeff Garzik * area, filling in the S/G table, and finally 4817c6fd2807SJeff Garzik * writing the taskfile to hardware, starting the command. 4818c6fd2807SJeff Garzik * 4819c6fd2807SJeff Garzik * LOCKING: 4820cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 4821c6fd2807SJeff Garzik */ 4822c6fd2807SJeff Garzik void ata_qc_issue(struct ata_queued_cmd *qc) 4823c6fd2807SJeff Garzik { 4824c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 4825c6fd2807SJeff Garzik 4826c6fd2807SJeff Garzik /* Make sure only one non-NCQ command is outstanding. The 4827c6fd2807SJeff Garzik * check is skipped for old EH because it reuses active qc to 4828c6fd2807SJeff Garzik * request ATAPI sense. 4829c6fd2807SJeff Garzik */ 4830c6fd2807SJeff Garzik WARN_ON(ap->ops->error_handler && ata_tag_valid(ap->active_tag)); 4831c6fd2807SJeff Garzik 4832c6fd2807SJeff Garzik if (qc->tf.protocol == ATA_PROT_NCQ) { 4833c6fd2807SJeff Garzik WARN_ON(ap->sactive & (1 << qc->tag)); 4834c6fd2807SJeff Garzik ap->sactive |= 1 << qc->tag; 4835c6fd2807SJeff Garzik } else { 4836c6fd2807SJeff Garzik WARN_ON(ap->sactive); 4837c6fd2807SJeff Garzik ap->active_tag = qc->tag; 4838c6fd2807SJeff Garzik } 4839c6fd2807SJeff Garzik 4840c6fd2807SJeff Garzik qc->flags |= ATA_QCFLAG_ACTIVE; 4841c6fd2807SJeff Garzik ap->qc_active |= 1 << qc->tag; 4842c6fd2807SJeff Garzik 4843c6fd2807SJeff Garzik if (ata_should_dma_map(qc)) { 4844c6fd2807SJeff Garzik if (qc->flags & ATA_QCFLAG_SG) { 4845c6fd2807SJeff Garzik if (ata_sg_setup(qc)) 4846c6fd2807SJeff Garzik goto sg_err; 4847c6fd2807SJeff Garzik } else if (qc->flags & ATA_QCFLAG_SINGLE) { 4848c6fd2807SJeff Garzik if (ata_sg_setup_one(qc)) 4849c6fd2807SJeff Garzik goto sg_err; 4850c6fd2807SJeff Garzik } 4851c6fd2807SJeff Garzik } else { 4852c6fd2807SJeff Garzik qc->flags &= ~ATA_QCFLAG_DMAMAP; 4853c6fd2807SJeff Garzik } 4854c6fd2807SJeff Garzik 4855c6fd2807SJeff Garzik ap->ops->qc_prep(qc); 4856c6fd2807SJeff Garzik 4857c6fd2807SJeff Garzik qc->err_mask |= ap->ops->qc_issue(qc); 4858c6fd2807SJeff Garzik if (unlikely(qc->err_mask)) 4859c6fd2807SJeff Garzik goto err; 4860c6fd2807SJeff Garzik return; 4861c6fd2807SJeff Garzik 4862c6fd2807SJeff Garzik sg_err: 4863c6fd2807SJeff Garzik qc->flags &= ~ATA_QCFLAG_DMAMAP; 4864c6fd2807SJeff Garzik qc->err_mask |= AC_ERR_SYSTEM; 4865c6fd2807SJeff Garzik err: 4866c6fd2807SJeff Garzik ata_qc_complete(qc); 4867c6fd2807SJeff Garzik } 4868c6fd2807SJeff Garzik 4869c6fd2807SJeff Garzik /** 4870c6fd2807SJeff Garzik * ata_qc_issue_prot - issue taskfile to device in proto-dependent manner 4871c6fd2807SJeff Garzik * @qc: command to issue to device 4872c6fd2807SJeff Garzik * 4873c6fd2807SJeff Garzik * Using various libata functions and hooks, this function 4874c6fd2807SJeff Garzik * starts an ATA command. ATA commands are grouped into 4875c6fd2807SJeff Garzik * classes called "protocols", and issuing each type of protocol 4876c6fd2807SJeff Garzik * is slightly different. 4877c6fd2807SJeff Garzik * 4878c6fd2807SJeff Garzik * May be used as the qc_issue() entry in ata_port_operations. 4879c6fd2807SJeff Garzik * 4880c6fd2807SJeff Garzik * LOCKING: 4881cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 4882c6fd2807SJeff Garzik * 4883c6fd2807SJeff Garzik * RETURNS: 4884c6fd2807SJeff Garzik * Zero on success, AC_ERR_* mask on failure 4885c6fd2807SJeff Garzik */ 4886c6fd2807SJeff Garzik 4887c6fd2807SJeff Garzik unsigned int ata_qc_issue_prot(struct ata_queued_cmd *qc) 4888c6fd2807SJeff Garzik { 4889c6fd2807SJeff Garzik struct ata_port *ap = qc->ap; 4890c6fd2807SJeff Garzik 4891c6fd2807SJeff Garzik /* Use polling pio if the LLD doesn't handle 4892c6fd2807SJeff Garzik * interrupt driven pio and atapi CDB interrupt. 4893c6fd2807SJeff Garzik */ 4894c6fd2807SJeff Garzik if (ap->flags & ATA_FLAG_PIO_POLLING) { 4895c6fd2807SJeff Garzik switch (qc->tf.protocol) { 4896c6fd2807SJeff Garzik case ATA_PROT_PIO: 4897e3472cbeSAlbert Lee case ATA_PROT_NODATA: 4898c6fd2807SJeff Garzik case ATA_PROT_ATAPI: 4899c6fd2807SJeff Garzik case ATA_PROT_ATAPI_NODATA: 4900c6fd2807SJeff Garzik qc->tf.flags |= ATA_TFLAG_POLLING; 4901c6fd2807SJeff Garzik break; 4902c6fd2807SJeff Garzik case ATA_PROT_ATAPI_DMA: 4903c6fd2807SJeff Garzik if (qc->dev->flags & ATA_DFLAG_CDB_INTR) 4904c6fd2807SJeff Garzik /* see ata_dma_blacklisted() */ 4905c6fd2807SJeff Garzik BUG(); 4906c6fd2807SJeff Garzik break; 4907c6fd2807SJeff Garzik default: 4908c6fd2807SJeff Garzik break; 4909c6fd2807SJeff Garzik } 4910c6fd2807SJeff Garzik } 4911c6fd2807SJeff Garzik 49123d3cca37STejun Heo /* Some controllers show flaky interrupt behavior after 49133d3cca37STejun Heo * setting xfer mode. Use polling instead. 49143d3cca37STejun Heo */ 49153d3cca37STejun Heo if (unlikely(qc->tf.command == ATA_CMD_SET_FEATURES && 49163d3cca37STejun Heo qc->tf.feature == SETFEATURES_XFER) && 49173d3cca37STejun Heo (ap->flags & ATA_FLAG_SETXFER_POLLING)) 49183d3cca37STejun Heo qc->tf.flags |= ATA_TFLAG_POLLING; 49193d3cca37STejun Heo 4920c6fd2807SJeff Garzik /* select the device */ 4921c6fd2807SJeff Garzik ata_dev_select(ap, qc->dev->devno, 1, 0); 4922c6fd2807SJeff Garzik 4923c6fd2807SJeff Garzik /* start the command */ 4924c6fd2807SJeff Garzik switch (qc->tf.protocol) { 4925c6fd2807SJeff Garzik case ATA_PROT_NODATA: 4926c6fd2807SJeff Garzik if (qc->tf.flags & ATA_TFLAG_POLLING) 4927c6fd2807SJeff Garzik ata_qc_set_polling(qc); 4928c6fd2807SJeff Garzik 4929c6fd2807SJeff Garzik ata_tf_to_host(ap, &qc->tf); 4930c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_LAST; 4931c6fd2807SJeff Garzik 4932c6fd2807SJeff Garzik if (qc->tf.flags & ATA_TFLAG_POLLING) 4933c6fd2807SJeff Garzik ata_port_queue_task(ap, ata_pio_task, qc, 0); 4934c6fd2807SJeff Garzik 4935c6fd2807SJeff Garzik break; 4936c6fd2807SJeff Garzik 4937c6fd2807SJeff Garzik case ATA_PROT_DMA: 4938c6fd2807SJeff Garzik WARN_ON(qc->tf.flags & ATA_TFLAG_POLLING); 4939c6fd2807SJeff Garzik 4940c6fd2807SJeff Garzik ap->ops->tf_load(ap, &qc->tf); /* load tf registers */ 4941c6fd2807SJeff Garzik ap->ops->bmdma_setup(qc); /* set up bmdma */ 4942c6fd2807SJeff Garzik ap->ops->bmdma_start(qc); /* initiate bmdma */ 4943c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_LAST; 4944c6fd2807SJeff Garzik break; 4945c6fd2807SJeff Garzik 4946c6fd2807SJeff Garzik case ATA_PROT_PIO: 4947c6fd2807SJeff Garzik if (qc->tf.flags & ATA_TFLAG_POLLING) 4948c6fd2807SJeff Garzik ata_qc_set_polling(qc); 4949c6fd2807SJeff Garzik 4950c6fd2807SJeff Garzik ata_tf_to_host(ap, &qc->tf); 4951c6fd2807SJeff Garzik 4952c6fd2807SJeff Garzik if (qc->tf.flags & ATA_TFLAG_WRITE) { 4953c6fd2807SJeff Garzik /* PIO data out protocol */ 4954c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_FIRST; 4955c6fd2807SJeff Garzik ata_port_queue_task(ap, ata_pio_task, qc, 0); 4956c6fd2807SJeff Garzik 4957c6fd2807SJeff Garzik /* always send first data block using 4958c6fd2807SJeff Garzik * the ata_pio_task() codepath. 4959c6fd2807SJeff Garzik */ 4960c6fd2807SJeff Garzik } else { 4961c6fd2807SJeff Garzik /* PIO data in protocol */ 4962c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST; 4963c6fd2807SJeff Garzik 4964c6fd2807SJeff Garzik if (qc->tf.flags & ATA_TFLAG_POLLING) 4965c6fd2807SJeff Garzik ata_port_queue_task(ap, ata_pio_task, qc, 0); 4966c6fd2807SJeff Garzik 4967c6fd2807SJeff Garzik /* if polling, ata_pio_task() handles the rest. 4968c6fd2807SJeff Garzik * otherwise, interrupt handler takes over from here. 4969c6fd2807SJeff Garzik */ 4970c6fd2807SJeff Garzik } 4971c6fd2807SJeff Garzik 4972c6fd2807SJeff Garzik break; 4973c6fd2807SJeff Garzik 4974c6fd2807SJeff Garzik case ATA_PROT_ATAPI: 4975c6fd2807SJeff Garzik case ATA_PROT_ATAPI_NODATA: 4976c6fd2807SJeff Garzik if (qc->tf.flags & ATA_TFLAG_POLLING) 4977c6fd2807SJeff Garzik ata_qc_set_polling(qc); 4978c6fd2807SJeff Garzik 4979c6fd2807SJeff Garzik ata_tf_to_host(ap, &qc->tf); 4980c6fd2807SJeff Garzik 4981c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_FIRST; 4982c6fd2807SJeff Garzik 4983c6fd2807SJeff Garzik /* send cdb by polling if no cdb interrupt */ 4984c6fd2807SJeff Garzik if ((!(qc->dev->flags & ATA_DFLAG_CDB_INTR)) || 4985c6fd2807SJeff Garzik (qc->tf.flags & ATA_TFLAG_POLLING)) 4986c6fd2807SJeff Garzik ata_port_queue_task(ap, ata_pio_task, qc, 0); 4987c6fd2807SJeff Garzik break; 4988c6fd2807SJeff Garzik 4989c6fd2807SJeff Garzik case ATA_PROT_ATAPI_DMA: 4990c6fd2807SJeff Garzik WARN_ON(qc->tf.flags & ATA_TFLAG_POLLING); 4991c6fd2807SJeff Garzik 4992c6fd2807SJeff Garzik ap->ops->tf_load(ap, &qc->tf); /* load tf registers */ 4993c6fd2807SJeff Garzik ap->ops->bmdma_setup(qc); /* set up bmdma */ 4994c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_FIRST; 4995c6fd2807SJeff Garzik 4996c6fd2807SJeff Garzik /* send cdb by polling if no cdb interrupt */ 4997c6fd2807SJeff Garzik if (!(qc->dev->flags & ATA_DFLAG_CDB_INTR)) 4998c6fd2807SJeff Garzik ata_port_queue_task(ap, ata_pio_task, qc, 0); 4999c6fd2807SJeff Garzik break; 5000c6fd2807SJeff Garzik 5001c6fd2807SJeff Garzik default: 5002c6fd2807SJeff Garzik WARN_ON(1); 5003c6fd2807SJeff Garzik return AC_ERR_SYSTEM; 5004c6fd2807SJeff Garzik } 5005c6fd2807SJeff Garzik 5006c6fd2807SJeff Garzik return 0; 5007c6fd2807SJeff Garzik } 5008c6fd2807SJeff Garzik 5009c6fd2807SJeff Garzik /** 5010c6fd2807SJeff Garzik * ata_host_intr - Handle host interrupt for given (port, task) 5011c6fd2807SJeff Garzik * @ap: Port on which interrupt arrived (possibly...) 5012c6fd2807SJeff Garzik * @qc: Taskfile currently active in engine 5013c6fd2807SJeff Garzik * 5014c6fd2807SJeff Garzik * Handle host interrupt for given queued command. Currently, 5015c6fd2807SJeff Garzik * only DMA interrupts are handled. All other commands are 5016c6fd2807SJeff Garzik * handled via polling with interrupts disabled (nIEN bit). 5017c6fd2807SJeff Garzik * 5018c6fd2807SJeff Garzik * LOCKING: 5019cca3974eSJeff Garzik * spin_lock_irqsave(host lock) 5020c6fd2807SJeff Garzik * 5021c6fd2807SJeff Garzik * RETURNS: 5022c6fd2807SJeff Garzik * One if interrupt was handled, zero if not (shared irq). 5023c6fd2807SJeff Garzik */ 5024c6fd2807SJeff Garzik 5025c6fd2807SJeff Garzik inline unsigned int ata_host_intr (struct ata_port *ap, 5026c6fd2807SJeff Garzik struct ata_queued_cmd *qc) 5027c6fd2807SJeff Garzik { 5028ea54763fSTejun Heo struct ata_eh_info *ehi = &ap->eh_info; 5029c6fd2807SJeff Garzik u8 status, host_stat = 0; 5030c6fd2807SJeff Garzik 5031c6fd2807SJeff Garzik VPRINTK("ata%u: protocol %d task_state %d\n", 5032c6fd2807SJeff Garzik ap->id, qc->tf.protocol, ap->hsm_task_state); 5033c6fd2807SJeff Garzik 5034c6fd2807SJeff Garzik /* Check whether we are expecting interrupt in this state */ 5035c6fd2807SJeff Garzik switch (ap->hsm_task_state) { 5036c6fd2807SJeff Garzik case HSM_ST_FIRST: 5037c6fd2807SJeff Garzik /* Some pre-ATAPI-4 devices assert INTRQ 5038c6fd2807SJeff Garzik * at this state when ready to receive CDB. 5039c6fd2807SJeff Garzik */ 5040c6fd2807SJeff Garzik 5041c6fd2807SJeff Garzik /* Check the ATA_DFLAG_CDB_INTR flag is enough here. 5042c6fd2807SJeff Garzik * The flag was turned on only for atapi devices. 5043c6fd2807SJeff Garzik * No need to check is_atapi_taskfile(&qc->tf) again. 5044c6fd2807SJeff Garzik */ 5045c6fd2807SJeff Garzik if (!(qc->dev->flags & ATA_DFLAG_CDB_INTR)) 5046c6fd2807SJeff Garzik goto idle_irq; 5047c6fd2807SJeff Garzik break; 5048c6fd2807SJeff Garzik case HSM_ST_LAST: 5049c6fd2807SJeff Garzik if (qc->tf.protocol == ATA_PROT_DMA || 5050c6fd2807SJeff Garzik qc->tf.protocol == ATA_PROT_ATAPI_DMA) { 5051c6fd2807SJeff Garzik /* check status of DMA engine */ 5052c6fd2807SJeff Garzik host_stat = ap->ops->bmdma_status(ap); 5053c6fd2807SJeff Garzik VPRINTK("ata%u: host_stat 0x%X\n", ap->id, host_stat); 5054c6fd2807SJeff Garzik 5055c6fd2807SJeff Garzik /* if it's not our irq... */ 5056c6fd2807SJeff Garzik if (!(host_stat & ATA_DMA_INTR)) 5057c6fd2807SJeff Garzik goto idle_irq; 5058c6fd2807SJeff Garzik 5059c6fd2807SJeff Garzik /* before we do anything else, clear DMA-Start bit */ 5060c6fd2807SJeff Garzik ap->ops->bmdma_stop(qc); 5061c6fd2807SJeff Garzik 5062c6fd2807SJeff Garzik if (unlikely(host_stat & ATA_DMA_ERR)) { 5063c6fd2807SJeff Garzik /* error when transfering data to/from memory */ 5064c6fd2807SJeff Garzik qc->err_mask |= AC_ERR_HOST_BUS; 5065c6fd2807SJeff Garzik ap->hsm_task_state = HSM_ST_ERR; 5066c6fd2807SJeff Garzik } 5067c6fd2807SJeff Garzik } 5068c6fd2807SJeff Garzik break; 5069c6fd2807SJeff Garzik case HSM_ST: 5070c6fd2807SJeff Garzik break; 5071c6fd2807SJeff Garzik default: 5072c6fd2807SJeff Garzik goto idle_irq; 5073c6fd2807SJeff Garzik } 5074c6fd2807SJeff Garzik 5075c6fd2807SJeff Garzik /* check altstatus */ 5076c6fd2807SJeff Garzik status = ata_altstatus(ap); 5077c6fd2807SJeff Garzik if (status & ATA_BUSY) 5078c6fd2807SJeff Garzik goto idle_irq; 5079c6fd2807SJeff Garzik 5080c6fd2807SJeff Garzik /* check main status, clearing INTRQ */ 5081c6fd2807SJeff Garzik status = ata_chk_status(ap); 5082c6fd2807SJeff Garzik if (unlikely(status & ATA_BUSY)) 5083c6fd2807SJeff Garzik goto idle_irq; 5084c6fd2807SJeff Garzik 5085c6fd2807SJeff Garzik /* ack bmdma irq events */ 5086c6fd2807SJeff Garzik ap->ops->irq_clear(ap); 5087c6fd2807SJeff Garzik 5088c6fd2807SJeff Garzik ata_hsm_move(ap, qc, status, 0); 5089ea54763fSTejun Heo 5090ea54763fSTejun Heo if (unlikely(qc->err_mask) && (qc->tf.protocol == ATA_PROT_DMA || 5091ea54763fSTejun Heo qc->tf.protocol == ATA_PROT_ATAPI_DMA)) 5092ea54763fSTejun Heo ata_ehi_push_desc(ehi, "BMDMA stat 0x%x", host_stat); 5093ea54763fSTejun Heo 5094c6fd2807SJeff Garzik return 1; /* irq handled */ 5095c6fd2807SJeff Garzik 5096c6fd2807SJeff Garzik idle_irq: 5097c6fd2807SJeff Garzik ap->stats.idle_irq++; 5098c6fd2807SJeff Garzik 5099c6fd2807SJeff Garzik #ifdef ATA_IRQ_TRAP 5100c6fd2807SJeff Garzik if ((ap->stats.idle_irq % 1000) == 0) { 510183625006SAkira Iguchi ap->ops->irq_ack(ap, 0); /* debug trap */ 5102c6fd2807SJeff Garzik ata_port_printk(ap, KERN_WARNING, "irq trap\n"); 5103c6fd2807SJeff Garzik return 1; 5104c6fd2807SJeff Garzik } 5105c6fd2807SJeff Garzik #endif 5106c6fd2807SJeff Garzik return 0; /* irq not handled */ 5107c6fd2807SJeff Garzik } 5108c6fd2807SJeff Garzik 5109c6fd2807SJeff Garzik /** 5110c6fd2807SJeff Garzik * ata_interrupt - Default ATA host interrupt handler 5111c6fd2807SJeff Garzik * @irq: irq line (unused) 5112cca3974eSJeff Garzik * @dev_instance: pointer to our ata_host information structure 5113c6fd2807SJeff Garzik * 5114c6fd2807SJeff Garzik * Default interrupt handler for PCI IDE devices. Calls 5115c6fd2807SJeff Garzik * ata_host_intr() for each port that is not disabled. 5116c6fd2807SJeff Garzik * 5117c6fd2807SJeff Garzik * LOCKING: 5118cca3974eSJeff Garzik * Obtains host lock during operation. 5119c6fd2807SJeff Garzik * 5120c6fd2807SJeff Garzik * RETURNS: 5121c6fd2807SJeff Garzik * IRQ_NONE or IRQ_HANDLED. 5122c6fd2807SJeff Garzik */ 5123c6fd2807SJeff Garzik 51247d12e780SDavid Howells irqreturn_t ata_interrupt (int irq, void *dev_instance) 5125c6fd2807SJeff Garzik { 5126cca3974eSJeff Garzik struct ata_host *host = dev_instance; 5127c6fd2807SJeff Garzik unsigned int i; 5128c6fd2807SJeff Garzik unsigned int handled = 0; 5129c6fd2807SJeff Garzik unsigned long flags; 5130c6fd2807SJeff Garzik 5131c6fd2807SJeff Garzik /* TODO: make _irqsave conditional on x86 PCI IDE legacy mode */ 5132cca3974eSJeff Garzik spin_lock_irqsave(&host->lock, flags); 5133c6fd2807SJeff Garzik 5134cca3974eSJeff Garzik for (i = 0; i < host->n_ports; i++) { 5135c6fd2807SJeff Garzik struct ata_port *ap; 5136c6fd2807SJeff Garzik 5137cca3974eSJeff Garzik ap = host->ports[i]; 5138c6fd2807SJeff Garzik if (ap && 5139c6fd2807SJeff Garzik !(ap->flags & ATA_FLAG_DISABLED)) { 5140c6fd2807SJeff Garzik struct ata_queued_cmd *qc; 5141c6fd2807SJeff Garzik 5142c6fd2807SJeff Garzik qc = ata_qc_from_tag(ap, ap->active_tag); 5143c6fd2807SJeff Garzik if (qc && (!(qc->tf.flags & ATA_TFLAG_POLLING)) && 5144c6fd2807SJeff Garzik (qc->flags & ATA_QCFLAG_ACTIVE)) 5145c6fd2807SJeff Garzik handled |= ata_host_intr(ap, qc); 5146c6fd2807SJeff Garzik } 5147c6fd2807SJeff Garzik } 5148c6fd2807SJeff Garzik 5149cca3974eSJeff Garzik spin_unlock_irqrestore(&host->lock, flags); 5150c6fd2807SJeff Garzik 5151c6fd2807SJeff Garzik return IRQ_RETVAL(handled); 5152c6fd2807SJeff Garzik } 5153c6fd2807SJeff Garzik 5154c6fd2807SJeff Garzik /** 5155c6fd2807SJeff Garzik * sata_scr_valid - test whether SCRs are accessible 5156c6fd2807SJeff Garzik * @ap: ATA port to test SCR accessibility for 5157c6fd2807SJeff Garzik * 5158c6fd2807SJeff Garzik * Test whether SCRs are accessible for @ap. 5159c6fd2807SJeff Garzik * 5160c6fd2807SJeff Garzik * LOCKING: 5161c6fd2807SJeff Garzik * None. 5162c6fd2807SJeff Garzik * 5163c6fd2807SJeff Garzik * RETURNS: 5164c6fd2807SJeff Garzik * 1 if SCRs are accessible, 0 otherwise. 5165c6fd2807SJeff Garzik */ 5166c6fd2807SJeff Garzik int sata_scr_valid(struct ata_port *ap) 5167c6fd2807SJeff Garzik { 5168c6fd2807SJeff Garzik return ap->cbl == ATA_CBL_SATA && ap->ops->scr_read; 5169c6fd2807SJeff Garzik } 5170c6fd2807SJeff Garzik 5171c6fd2807SJeff Garzik /** 5172c6fd2807SJeff Garzik * sata_scr_read - read SCR register of the specified port 5173c6fd2807SJeff Garzik * @ap: ATA port to read SCR for 5174c6fd2807SJeff Garzik * @reg: SCR to read 5175c6fd2807SJeff Garzik * @val: Place to store read value 5176c6fd2807SJeff Garzik * 5177c6fd2807SJeff Garzik * Read SCR register @reg of @ap into *@val. This function is 5178c6fd2807SJeff Garzik * guaranteed to succeed if the cable type of the port is SATA 5179c6fd2807SJeff Garzik * and the port implements ->scr_read. 5180c6fd2807SJeff Garzik * 5181c6fd2807SJeff Garzik * LOCKING: 5182c6fd2807SJeff Garzik * None. 5183c6fd2807SJeff Garzik * 5184c6fd2807SJeff Garzik * RETURNS: 5185c6fd2807SJeff Garzik * 0 on success, negative errno on failure. 5186c6fd2807SJeff Garzik */ 5187c6fd2807SJeff Garzik int sata_scr_read(struct ata_port *ap, int reg, u32 *val) 5188c6fd2807SJeff Garzik { 5189c6fd2807SJeff Garzik if (sata_scr_valid(ap)) { 5190c6fd2807SJeff Garzik *val = ap->ops->scr_read(ap, reg); 5191c6fd2807SJeff Garzik return 0; 5192c6fd2807SJeff Garzik } 5193c6fd2807SJeff Garzik return -EOPNOTSUPP; 5194c6fd2807SJeff Garzik } 5195c6fd2807SJeff Garzik 5196c6fd2807SJeff Garzik /** 5197c6fd2807SJeff Garzik * sata_scr_write - write SCR register of the specified port 5198c6fd2807SJeff Garzik * @ap: ATA port to write SCR for 5199c6fd2807SJeff Garzik * @reg: SCR to write 5200c6fd2807SJeff Garzik * @val: value to write 5201c6fd2807SJeff Garzik * 5202c6fd2807SJeff Garzik * Write @val to SCR register @reg of @ap. This function is 5203c6fd2807SJeff Garzik * guaranteed to succeed if the cable type of the port is SATA 5204c6fd2807SJeff Garzik * and the port implements ->scr_read. 5205c6fd2807SJeff Garzik * 5206c6fd2807SJeff Garzik * LOCKING: 5207c6fd2807SJeff Garzik * None. 5208c6fd2807SJeff Garzik * 5209c6fd2807SJeff Garzik * RETURNS: 5210c6fd2807SJeff Garzik * 0 on success, negative errno on failure. 5211c6fd2807SJeff Garzik */ 5212c6fd2807SJeff Garzik int sata_scr_write(struct ata_port *ap, int reg, u32 val) 5213c6fd2807SJeff Garzik { 5214c6fd2807SJeff Garzik if (sata_scr_valid(ap)) { 5215c6fd2807SJeff Garzik ap->ops->scr_write(ap, reg, val); 5216c6fd2807SJeff Garzik return 0; 5217c6fd2807SJeff Garzik } 5218c6fd2807SJeff Garzik return -EOPNOTSUPP; 5219c6fd2807SJeff Garzik } 5220c6fd2807SJeff Garzik 5221c6fd2807SJeff Garzik /** 5222c6fd2807SJeff Garzik * sata_scr_write_flush - write SCR register of the specified port and flush 5223c6fd2807SJeff Garzik * @ap: ATA port to write SCR for 5224c6fd2807SJeff Garzik * @reg: SCR to write 5225c6fd2807SJeff Garzik * @val: value to write 5226c6fd2807SJeff Garzik * 5227c6fd2807SJeff Garzik * This function is identical to sata_scr_write() except that this 5228c6fd2807SJeff Garzik * function performs flush after writing to the register. 5229c6fd2807SJeff Garzik * 5230c6fd2807SJeff Garzik * LOCKING: 5231c6fd2807SJeff Garzik * None. 5232c6fd2807SJeff Garzik * 5233c6fd2807SJeff Garzik * RETURNS: 5234c6fd2807SJeff Garzik * 0 on success, negative errno on failure. 5235c6fd2807SJeff Garzik */ 5236c6fd2807SJeff Garzik int sata_scr_write_flush(struct ata_port *ap, int reg, u32 val) 5237c6fd2807SJeff Garzik { 5238c6fd2807SJeff Garzik if (sata_scr_valid(ap)) { 5239c6fd2807SJeff Garzik ap->ops->scr_write(ap, reg, val); 5240c6fd2807SJeff Garzik ap->ops->scr_read(ap, reg); 5241c6fd2807SJeff Garzik return 0; 5242c6fd2807SJeff Garzik } 5243c6fd2807SJeff Garzik return -EOPNOTSUPP; 5244c6fd2807SJeff Garzik } 5245c6fd2807SJeff Garzik 5246c6fd2807SJeff Garzik /** 5247c6fd2807SJeff Garzik * ata_port_online - test whether the given port is online 5248c6fd2807SJeff Garzik * @ap: ATA port to test 5249c6fd2807SJeff Garzik * 5250c6fd2807SJeff Garzik * Test whether @ap is online. Note that this function returns 0 5251c6fd2807SJeff Garzik * if online status of @ap cannot be obtained, so 5252c6fd2807SJeff Garzik * ata_port_online(ap) != !ata_port_offline(ap). 5253c6fd2807SJeff Garzik * 5254c6fd2807SJeff Garzik * LOCKING: 5255c6fd2807SJeff Garzik * None. 5256c6fd2807SJeff Garzik * 5257c6fd2807SJeff Garzik * RETURNS: 5258c6fd2807SJeff Garzik * 1 if the port online status is available and online. 5259c6fd2807SJeff Garzik */ 5260c6fd2807SJeff Garzik int ata_port_online(struct ata_port *ap) 5261c6fd2807SJeff Garzik { 5262c6fd2807SJeff Garzik u32 sstatus; 5263c6fd2807SJeff Garzik 5264c6fd2807SJeff Garzik if (!sata_scr_read(ap, SCR_STATUS, &sstatus) && (sstatus & 0xf) == 0x3) 5265c6fd2807SJeff Garzik return 1; 5266c6fd2807SJeff Garzik return 0; 5267c6fd2807SJeff Garzik } 5268c6fd2807SJeff Garzik 5269c6fd2807SJeff Garzik /** 5270c6fd2807SJeff Garzik * ata_port_offline - test whether the given port is offline 5271c6fd2807SJeff Garzik * @ap: ATA port to test 5272c6fd2807SJeff Garzik * 5273c6fd2807SJeff Garzik * Test whether @ap is offline. Note that this function returns 5274c6fd2807SJeff Garzik * 0 if offline status of @ap cannot be obtained, so 5275c6fd2807SJeff Garzik * ata_port_online(ap) != !ata_port_offline(ap). 5276c6fd2807SJeff Garzik * 5277c6fd2807SJeff Garzik * LOCKING: 5278c6fd2807SJeff Garzik * None. 5279c6fd2807SJeff Garzik * 5280c6fd2807SJeff Garzik * RETURNS: 5281c6fd2807SJeff Garzik * 1 if the port offline status is available and offline. 5282c6fd2807SJeff Garzik */ 5283c6fd2807SJeff Garzik int ata_port_offline(struct ata_port *ap) 5284c6fd2807SJeff Garzik { 5285c6fd2807SJeff Garzik u32 sstatus; 5286c6fd2807SJeff Garzik 5287c6fd2807SJeff Garzik if (!sata_scr_read(ap, SCR_STATUS, &sstatus) && (sstatus & 0xf) != 0x3) 5288c6fd2807SJeff Garzik return 1; 5289c6fd2807SJeff Garzik return 0; 5290c6fd2807SJeff Garzik } 5291c6fd2807SJeff Garzik 5292c6fd2807SJeff Garzik int ata_flush_cache(struct ata_device *dev) 5293c6fd2807SJeff Garzik { 5294c6fd2807SJeff Garzik unsigned int err_mask; 5295c6fd2807SJeff Garzik u8 cmd; 5296c6fd2807SJeff Garzik 5297c6fd2807SJeff Garzik if (!ata_try_flush_cache(dev)) 5298c6fd2807SJeff Garzik return 0; 5299c6fd2807SJeff Garzik 53006fc49adbSTejun Heo if (dev->flags & ATA_DFLAG_FLUSH_EXT) 5301c6fd2807SJeff Garzik cmd = ATA_CMD_FLUSH_EXT; 5302c6fd2807SJeff Garzik else 5303c6fd2807SJeff Garzik cmd = ATA_CMD_FLUSH; 5304c6fd2807SJeff Garzik 5305c6fd2807SJeff Garzik err_mask = ata_do_simple_cmd(dev, cmd); 5306c6fd2807SJeff Garzik if (err_mask) { 5307c6fd2807SJeff Garzik ata_dev_printk(dev, KERN_ERR, "failed to flush cache\n"); 5308c6fd2807SJeff Garzik return -EIO; 5309c6fd2807SJeff Garzik } 5310c6fd2807SJeff Garzik 5311c6fd2807SJeff Garzik return 0; 5312c6fd2807SJeff Garzik } 5313c6fd2807SJeff Garzik 5314cca3974eSJeff Garzik static int ata_host_request_pm(struct ata_host *host, pm_message_t mesg, 5315cca3974eSJeff Garzik unsigned int action, unsigned int ehi_flags, 5316cca3974eSJeff Garzik int wait) 5317c6fd2807SJeff Garzik { 5318c6fd2807SJeff Garzik unsigned long flags; 5319c6fd2807SJeff Garzik int i, rc; 5320c6fd2807SJeff Garzik 5321cca3974eSJeff Garzik for (i = 0; i < host->n_ports; i++) { 5322cca3974eSJeff Garzik struct ata_port *ap = host->ports[i]; 5323c6fd2807SJeff Garzik 5324c6fd2807SJeff Garzik /* Previous resume operation might still be in 5325c6fd2807SJeff Garzik * progress. Wait for PM_PENDING to clear. 5326c6fd2807SJeff Garzik */ 5327c6fd2807SJeff Garzik if (ap->pflags & ATA_PFLAG_PM_PENDING) { 5328c6fd2807SJeff Garzik ata_port_wait_eh(ap); 5329c6fd2807SJeff Garzik WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING); 5330c6fd2807SJeff Garzik } 5331c6fd2807SJeff Garzik 5332c6fd2807SJeff Garzik /* request PM ops to EH */ 5333c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 5334c6fd2807SJeff Garzik 5335c6fd2807SJeff Garzik ap->pm_mesg = mesg; 5336c6fd2807SJeff Garzik if (wait) { 5337c6fd2807SJeff Garzik rc = 0; 5338c6fd2807SJeff Garzik ap->pm_result = &rc; 5339c6fd2807SJeff Garzik } 5340c6fd2807SJeff Garzik 5341c6fd2807SJeff Garzik ap->pflags |= ATA_PFLAG_PM_PENDING; 5342c6fd2807SJeff Garzik ap->eh_info.action |= action; 5343c6fd2807SJeff Garzik ap->eh_info.flags |= ehi_flags; 5344c6fd2807SJeff Garzik 5345c6fd2807SJeff Garzik ata_port_schedule_eh(ap); 5346c6fd2807SJeff Garzik 5347c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 5348c6fd2807SJeff Garzik 5349c6fd2807SJeff Garzik /* wait and check result */ 5350c6fd2807SJeff Garzik if (wait) { 5351c6fd2807SJeff Garzik ata_port_wait_eh(ap); 5352c6fd2807SJeff Garzik WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING); 5353c6fd2807SJeff Garzik if (rc) 5354c6fd2807SJeff Garzik return rc; 5355c6fd2807SJeff Garzik } 5356c6fd2807SJeff Garzik } 5357c6fd2807SJeff Garzik 5358c6fd2807SJeff Garzik return 0; 5359c6fd2807SJeff Garzik } 5360c6fd2807SJeff Garzik 5361c6fd2807SJeff Garzik /** 5362cca3974eSJeff Garzik * ata_host_suspend - suspend host 5363cca3974eSJeff Garzik * @host: host to suspend 5364c6fd2807SJeff Garzik * @mesg: PM message 5365c6fd2807SJeff Garzik * 5366cca3974eSJeff Garzik * Suspend @host. Actual operation is performed by EH. This 5367c6fd2807SJeff Garzik * function requests EH to perform PM operations and waits for EH 5368c6fd2807SJeff Garzik * to finish. 5369c6fd2807SJeff Garzik * 5370c6fd2807SJeff Garzik * LOCKING: 5371c6fd2807SJeff Garzik * Kernel thread context (may sleep). 5372c6fd2807SJeff Garzik * 5373c6fd2807SJeff Garzik * RETURNS: 5374c6fd2807SJeff Garzik * 0 on success, -errno on failure. 5375c6fd2807SJeff Garzik */ 5376cca3974eSJeff Garzik int ata_host_suspend(struct ata_host *host, pm_message_t mesg) 5377c6fd2807SJeff Garzik { 5378c6fd2807SJeff Garzik int i, j, rc; 5379c6fd2807SJeff Garzik 5380cca3974eSJeff Garzik rc = ata_host_request_pm(host, mesg, 0, ATA_EHI_QUIET, 1); 5381c6fd2807SJeff Garzik if (rc) 5382c6fd2807SJeff Garzik goto fail; 5383c6fd2807SJeff Garzik 5384c6fd2807SJeff Garzik /* EH is quiescent now. Fail if we have any ready device. 5385c6fd2807SJeff Garzik * This happens if hotplug occurs between completion of device 5386c6fd2807SJeff Garzik * suspension and here. 5387c6fd2807SJeff Garzik */ 5388cca3974eSJeff Garzik for (i = 0; i < host->n_ports; i++) { 5389cca3974eSJeff Garzik struct ata_port *ap = host->ports[i]; 5390c6fd2807SJeff Garzik 5391c6fd2807SJeff Garzik for (j = 0; j < ATA_MAX_DEVICES; j++) { 5392c6fd2807SJeff Garzik struct ata_device *dev = &ap->device[j]; 5393c6fd2807SJeff Garzik 5394c6fd2807SJeff Garzik if (ata_dev_ready(dev)) { 5395c6fd2807SJeff Garzik ata_port_printk(ap, KERN_WARNING, 5396c6fd2807SJeff Garzik "suspend failed, device %d " 5397c6fd2807SJeff Garzik "still active\n", dev->devno); 5398c6fd2807SJeff Garzik rc = -EBUSY; 5399c6fd2807SJeff Garzik goto fail; 5400c6fd2807SJeff Garzik } 5401c6fd2807SJeff Garzik } 5402c6fd2807SJeff Garzik } 5403c6fd2807SJeff Garzik 5404cca3974eSJeff Garzik host->dev->power.power_state = mesg; 5405c6fd2807SJeff Garzik return 0; 5406c6fd2807SJeff Garzik 5407c6fd2807SJeff Garzik fail: 5408cca3974eSJeff Garzik ata_host_resume(host); 5409c6fd2807SJeff Garzik return rc; 5410c6fd2807SJeff Garzik } 5411c6fd2807SJeff Garzik 5412c6fd2807SJeff Garzik /** 5413cca3974eSJeff Garzik * ata_host_resume - resume host 5414cca3974eSJeff Garzik * @host: host to resume 5415c6fd2807SJeff Garzik * 5416cca3974eSJeff Garzik * Resume @host. Actual operation is performed by EH. This 5417c6fd2807SJeff Garzik * function requests EH to perform PM operations and returns. 5418c6fd2807SJeff Garzik * Note that all resume operations are performed parallely. 5419c6fd2807SJeff Garzik * 5420c6fd2807SJeff Garzik * LOCKING: 5421c6fd2807SJeff Garzik * Kernel thread context (may sleep). 5422c6fd2807SJeff Garzik */ 5423cca3974eSJeff Garzik void ata_host_resume(struct ata_host *host) 5424c6fd2807SJeff Garzik { 5425cca3974eSJeff Garzik ata_host_request_pm(host, PMSG_ON, ATA_EH_SOFTRESET, 5426c6fd2807SJeff Garzik ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET, 0); 5427cca3974eSJeff Garzik host->dev->power.power_state = PMSG_ON; 5428c6fd2807SJeff Garzik } 5429c6fd2807SJeff Garzik 5430c6fd2807SJeff Garzik /** 5431c6fd2807SJeff Garzik * ata_port_start - Set port up for dma. 5432c6fd2807SJeff Garzik * @ap: Port to initialize 5433c6fd2807SJeff Garzik * 5434c6fd2807SJeff Garzik * Called just after data structures for each port are 5435c6fd2807SJeff Garzik * initialized. Allocates space for PRD table. 5436c6fd2807SJeff Garzik * 5437c6fd2807SJeff Garzik * May be used as the port_start() entry in ata_port_operations. 5438c6fd2807SJeff Garzik * 5439c6fd2807SJeff Garzik * LOCKING: 5440c6fd2807SJeff Garzik * Inherited from caller. 5441c6fd2807SJeff Garzik */ 5442c6fd2807SJeff Garzik int ata_port_start(struct ata_port *ap) 5443c6fd2807SJeff Garzik { 5444c6fd2807SJeff Garzik struct device *dev = ap->dev; 5445c6fd2807SJeff Garzik int rc; 5446c6fd2807SJeff Garzik 5447f0d36efdSTejun Heo ap->prd = dmam_alloc_coherent(dev, ATA_PRD_TBL_SZ, &ap->prd_dma, 5448f0d36efdSTejun Heo GFP_KERNEL); 5449c6fd2807SJeff Garzik if (!ap->prd) 5450c6fd2807SJeff Garzik return -ENOMEM; 5451c6fd2807SJeff Garzik 5452c6fd2807SJeff Garzik rc = ata_pad_alloc(ap, dev); 5453f0d36efdSTejun Heo if (rc) 5454c6fd2807SJeff Garzik return rc; 5455c6fd2807SJeff Garzik 5456f0d36efdSTejun Heo DPRINTK("prd alloc, virt %p, dma %llx\n", ap->prd, 5457f0d36efdSTejun Heo (unsigned long long)ap->prd_dma); 5458c6fd2807SJeff Garzik return 0; 5459c6fd2807SJeff Garzik } 5460c6fd2807SJeff Garzik 5461c6fd2807SJeff Garzik /** 5462c6fd2807SJeff Garzik * ata_dev_init - Initialize an ata_device structure 5463c6fd2807SJeff Garzik * @dev: Device structure to initialize 5464c6fd2807SJeff Garzik * 5465c6fd2807SJeff Garzik * Initialize @dev in preparation for probing. 5466c6fd2807SJeff Garzik * 5467c6fd2807SJeff Garzik * LOCKING: 5468c6fd2807SJeff Garzik * Inherited from caller. 5469c6fd2807SJeff Garzik */ 5470c6fd2807SJeff Garzik void ata_dev_init(struct ata_device *dev) 5471c6fd2807SJeff Garzik { 5472c6fd2807SJeff Garzik struct ata_port *ap = dev->ap; 5473c6fd2807SJeff Garzik unsigned long flags; 5474c6fd2807SJeff Garzik 5475c6fd2807SJeff Garzik /* SATA spd limit is bound to the first device */ 5476c6fd2807SJeff Garzik ap->sata_spd_limit = ap->hw_sata_spd_limit; 5477c6fd2807SJeff Garzik 5478c6fd2807SJeff Garzik /* High bits of dev->flags are used to record warm plug 5479c6fd2807SJeff Garzik * requests which occur asynchronously. Synchronize using 5480cca3974eSJeff Garzik * host lock. 5481c6fd2807SJeff Garzik */ 5482c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 5483c6fd2807SJeff Garzik dev->flags &= ~ATA_DFLAG_INIT_MASK; 5484c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 5485c6fd2807SJeff Garzik 5486c6fd2807SJeff Garzik memset((void *)dev + ATA_DEVICE_CLEAR_OFFSET, 0, 5487c6fd2807SJeff Garzik sizeof(*dev) - ATA_DEVICE_CLEAR_OFFSET); 5488c6fd2807SJeff Garzik dev->pio_mask = UINT_MAX; 5489c6fd2807SJeff Garzik dev->mwdma_mask = UINT_MAX; 5490c6fd2807SJeff Garzik dev->udma_mask = UINT_MAX; 5491c6fd2807SJeff Garzik } 5492c6fd2807SJeff Garzik 5493c6fd2807SJeff Garzik /** 5494c6fd2807SJeff Garzik * ata_port_init - Initialize an ata_port structure 5495c6fd2807SJeff Garzik * @ap: Structure to initialize 5496cca3974eSJeff Garzik * @host: Collection of hosts to which @ap belongs 5497c6fd2807SJeff Garzik * @ent: Probe information provided by low-level driver 5498c6fd2807SJeff Garzik * @port_no: Port number associated with this ata_port 5499c6fd2807SJeff Garzik * 5500c6fd2807SJeff Garzik * Initialize a new ata_port structure. 5501c6fd2807SJeff Garzik * 5502c6fd2807SJeff Garzik * LOCKING: 5503c6fd2807SJeff Garzik * Inherited from caller. 5504c6fd2807SJeff Garzik */ 5505cca3974eSJeff Garzik void ata_port_init(struct ata_port *ap, struct ata_host *host, 5506c6fd2807SJeff Garzik const struct ata_probe_ent *ent, unsigned int port_no) 5507c6fd2807SJeff Garzik { 5508c6fd2807SJeff Garzik unsigned int i; 5509c6fd2807SJeff Garzik 5510cca3974eSJeff Garzik ap->lock = &host->lock; 5511c6fd2807SJeff Garzik ap->flags = ATA_FLAG_DISABLED; 5512c6fd2807SJeff Garzik ap->id = ata_unique_id++; 5513c6fd2807SJeff Garzik ap->ctl = ATA_DEVCTL_OBS; 5514cca3974eSJeff Garzik ap->host = host; 5515c6fd2807SJeff Garzik ap->dev = ent->dev; 5516c6fd2807SJeff Garzik ap->port_no = port_no; 5517fea63e38STejun Heo if (port_no == 1 && ent->pinfo2) { 5518fea63e38STejun Heo ap->pio_mask = ent->pinfo2->pio_mask; 5519fea63e38STejun Heo ap->mwdma_mask = ent->pinfo2->mwdma_mask; 5520fea63e38STejun Heo ap->udma_mask = ent->pinfo2->udma_mask; 5521fea63e38STejun Heo ap->flags |= ent->pinfo2->flags; 5522fea63e38STejun Heo ap->ops = ent->pinfo2->port_ops; 5523fea63e38STejun Heo } else { 5524c6fd2807SJeff Garzik ap->pio_mask = ent->pio_mask; 5525c6fd2807SJeff Garzik ap->mwdma_mask = ent->mwdma_mask; 5526c6fd2807SJeff Garzik ap->udma_mask = ent->udma_mask; 5527cca3974eSJeff Garzik ap->flags |= ent->port_flags; 5528c6fd2807SJeff Garzik ap->ops = ent->port_ops; 5529fea63e38STejun Heo } 5530c6fd2807SJeff Garzik ap->hw_sata_spd_limit = UINT_MAX; 5531c6fd2807SJeff Garzik ap->active_tag = ATA_TAG_POISON; 5532c6fd2807SJeff Garzik ap->last_ctl = 0xFF; 5533c6fd2807SJeff Garzik 5534c6fd2807SJeff Garzik #if defined(ATA_VERBOSE_DEBUG) 5535c6fd2807SJeff Garzik /* turn on all debugging levels */ 5536c6fd2807SJeff Garzik ap->msg_enable = 0x00FF; 5537c6fd2807SJeff Garzik #elif defined(ATA_DEBUG) 5538c6fd2807SJeff Garzik ap->msg_enable = ATA_MSG_DRV | ATA_MSG_INFO | ATA_MSG_CTL | ATA_MSG_WARN | ATA_MSG_ERR; 5539c6fd2807SJeff Garzik #else 5540c6fd2807SJeff Garzik ap->msg_enable = ATA_MSG_DRV | ATA_MSG_ERR | ATA_MSG_WARN; 5541c6fd2807SJeff Garzik #endif 5542c6fd2807SJeff Garzik 554365f27f38SDavid Howells INIT_DELAYED_WORK(&ap->port_task, NULL); 554465f27f38SDavid Howells INIT_DELAYED_WORK(&ap->hotplug_task, ata_scsi_hotplug); 554565f27f38SDavid Howells INIT_WORK(&ap->scsi_rescan_task, ata_scsi_dev_rescan); 5546c6fd2807SJeff Garzik INIT_LIST_HEAD(&ap->eh_done_q); 5547c6fd2807SJeff Garzik init_waitqueue_head(&ap->eh_wait_q); 5548c6fd2807SJeff Garzik 5549c6fd2807SJeff Garzik /* set cable type */ 5550c6fd2807SJeff Garzik ap->cbl = ATA_CBL_NONE; 5551c6fd2807SJeff Garzik if (ap->flags & ATA_FLAG_SATA) 5552c6fd2807SJeff Garzik ap->cbl = ATA_CBL_SATA; 5553c6fd2807SJeff Garzik 5554c6fd2807SJeff Garzik for (i = 0; i < ATA_MAX_DEVICES; i++) { 5555c6fd2807SJeff Garzik struct ata_device *dev = &ap->device[i]; 5556c6fd2807SJeff Garzik dev->ap = ap; 5557c6fd2807SJeff Garzik dev->devno = i; 5558c6fd2807SJeff Garzik ata_dev_init(dev); 5559c6fd2807SJeff Garzik } 5560c6fd2807SJeff Garzik 5561c6fd2807SJeff Garzik #ifdef ATA_IRQ_TRAP 5562c6fd2807SJeff Garzik ap->stats.unhandled_irq = 1; 5563c6fd2807SJeff Garzik ap->stats.idle_irq = 1; 5564c6fd2807SJeff Garzik #endif 5565c6fd2807SJeff Garzik 5566c6fd2807SJeff Garzik memcpy(&ap->ioaddr, &ent->port[port_no], sizeof(struct ata_ioports)); 5567c6fd2807SJeff Garzik } 5568c6fd2807SJeff Garzik 5569c6fd2807SJeff Garzik /** 5570c6fd2807SJeff Garzik * ata_port_init_shost - Initialize SCSI host associated with ATA port 5571c6fd2807SJeff Garzik * @ap: ATA port to initialize SCSI host for 5572c6fd2807SJeff Garzik * @shost: SCSI host associated with @ap 5573c6fd2807SJeff Garzik * 5574c6fd2807SJeff Garzik * Initialize SCSI host @shost associated with ATA port @ap. 5575c6fd2807SJeff Garzik * 5576c6fd2807SJeff Garzik * LOCKING: 5577c6fd2807SJeff Garzik * Inherited from caller. 5578c6fd2807SJeff Garzik */ 5579c6fd2807SJeff Garzik static void ata_port_init_shost(struct ata_port *ap, struct Scsi_Host *shost) 5580c6fd2807SJeff Garzik { 5581cca3974eSJeff Garzik ap->scsi_host = shost; 5582c6fd2807SJeff Garzik 5583c6fd2807SJeff Garzik shost->unique_id = ap->id; 5584c6fd2807SJeff Garzik shost->max_id = 16; 5585c6fd2807SJeff Garzik shost->max_lun = 1; 5586c6fd2807SJeff Garzik shost->max_channel = 1; 5587c6fd2807SJeff Garzik shost->max_cmd_len = 12; 5588c6fd2807SJeff Garzik } 5589c6fd2807SJeff Garzik 5590c6fd2807SJeff Garzik /** 5591c6fd2807SJeff Garzik * ata_port_add - Attach low-level ATA driver to system 5592c6fd2807SJeff Garzik * @ent: Information provided by low-level driver 5593cca3974eSJeff Garzik * @host: Collections of ports to which we add 5594c6fd2807SJeff Garzik * @port_no: Port number associated with this host 5595c6fd2807SJeff Garzik * 5596c6fd2807SJeff Garzik * Attach low-level ATA driver to system. 5597c6fd2807SJeff Garzik * 5598c6fd2807SJeff Garzik * LOCKING: 5599c6fd2807SJeff Garzik * PCI/etc. bus probe sem. 5600c6fd2807SJeff Garzik * 5601c6fd2807SJeff Garzik * RETURNS: 5602c6fd2807SJeff Garzik * New ata_port on success, for NULL on error. 5603c6fd2807SJeff Garzik */ 5604c6fd2807SJeff Garzik static struct ata_port * ata_port_add(const struct ata_probe_ent *ent, 5605cca3974eSJeff Garzik struct ata_host *host, 5606c6fd2807SJeff Garzik unsigned int port_no) 5607c6fd2807SJeff Garzik { 5608c6fd2807SJeff Garzik struct Scsi_Host *shost; 5609c6fd2807SJeff Garzik struct ata_port *ap; 5610c6fd2807SJeff Garzik 5611c6fd2807SJeff Garzik DPRINTK("ENTER\n"); 5612c6fd2807SJeff Garzik 5613c6fd2807SJeff Garzik if (!ent->port_ops->error_handler && 5614cca3974eSJeff Garzik !(ent->port_flags & (ATA_FLAG_SATA_RESET | ATA_FLAG_SRST))) { 5615c6fd2807SJeff Garzik printk(KERN_ERR "ata%u: no reset mechanism available\n", 5616c6fd2807SJeff Garzik port_no); 5617c6fd2807SJeff Garzik return NULL; 5618c6fd2807SJeff Garzik } 5619c6fd2807SJeff Garzik 5620c6fd2807SJeff Garzik shost = scsi_host_alloc(ent->sht, sizeof(struct ata_port)); 5621c6fd2807SJeff Garzik if (!shost) 5622c6fd2807SJeff Garzik return NULL; 5623c6fd2807SJeff Garzik 5624c6fd2807SJeff Garzik shost->transportt = &ata_scsi_transport_template; 5625c6fd2807SJeff Garzik 5626c6fd2807SJeff Garzik ap = ata_shost_to_port(shost); 5627c6fd2807SJeff Garzik 5628cca3974eSJeff Garzik ata_port_init(ap, host, ent, port_no); 5629c6fd2807SJeff Garzik ata_port_init_shost(ap, shost); 5630c6fd2807SJeff Garzik 5631c6fd2807SJeff Garzik return ap; 5632c6fd2807SJeff Garzik } 5633c6fd2807SJeff Garzik 5634f0d36efdSTejun Heo static void ata_host_release(struct device *gendev, void *res) 5635f0d36efdSTejun Heo { 5636f0d36efdSTejun Heo struct ata_host *host = dev_get_drvdata(gendev); 5637f0d36efdSTejun Heo int i; 5638f0d36efdSTejun Heo 5639f0d36efdSTejun Heo for (i = 0; i < host->n_ports; i++) { 5640f0d36efdSTejun Heo struct ata_port *ap = host->ports[i]; 5641f0d36efdSTejun Heo 5642f0d36efdSTejun Heo if (!ap) 5643f0d36efdSTejun Heo continue; 5644f0d36efdSTejun Heo 5645f0d36efdSTejun Heo if (ap->ops->port_stop) 5646f0d36efdSTejun Heo ap->ops->port_stop(ap); 5647f0d36efdSTejun Heo 5648f0d36efdSTejun Heo scsi_host_put(ap->scsi_host); 5649f0d36efdSTejun Heo } 5650f0d36efdSTejun Heo 5651f0d36efdSTejun Heo if (host->ops->host_stop) 5652f0d36efdSTejun Heo host->ops->host_stop(host); 5653f0d36efdSTejun Heo } 5654f0d36efdSTejun Heo 5655c6fd2807SJeff Garzik /** 5656cca3974eSJeff Garzik * ata_sas_host_init - Initialize a host struct 5657cca3974eSJeff Garzik * @host: host to initialize 5658cca3974eSJeff Garzik * @dev: device host is attached to 5659cca3974eSJeff Garzik * @flags: host flags 5660c6fd2807SJeff Garzik * @ops: port_ops 5661c6fd2807SJeff Garzik * 5662c6fd2807SJeff Garzik * LOCKING: 5663c6fd2807SJeff Garzik * PCI/etc. bus probe sem. 5664c6fd2807SJeff Garzik * 5665c6fd2807SJeff Garzik */ 5666c6fd2807SJeff Garzik 5667cca3974eSJeff Garzik void ata_host_init(struct ata_host *host, struct device *dev, 5668cca3974eSJeff Garzik unsigned long flags, const struct ata_port_operations *ops) 5669c6fd2807SJeff Garzik { 5670cca3974eSJeff Garzik spin_lock_init(&host->lock); 5671cca3974eSJeff Garzik host->dev = dev; 5672cca3974eSJeff Garzik host->flags = flags; 5673cca3974eSJeff Garzik host->ops = ops; 5674c6fd2807SJeff Garzik } 5675c6fd2807SJeff Garzik 5676c6fd2807SJeff Garzik /** 5677c6fd2807SJeff Garzik * ata_device_add - Register hardware device with ATA and SCSI layers 5678c6fd2807SJeff Garzik * @ent: Probe information describing hardware device to be registered 5679c6fd2807SJeff Garzik * 5680c6fd2807SJeff Garzik * This function processes the information provided in the probe 5681c6fd2807SJeff Garzik * information struct @ent, allocates the necessary ATA and SCSI 5682c6fd2807SJeff Garzik * host information structures, initializes them, and registers 5683c6fd2807SJeff Garzik * everything with requisite kernel subsystems. 5684c6fd2807SJeff Garzik * 5685c6fd2807SJeff Garzik * This function requests irqs, probes the ATA bus, and probes 5686c6fd2807SJeff Garzik * the SCSI bus. 5687c6fd2807SJeff Garzik * 5688c6fd2807SJeff Garzik * LOCKING: 5689c6fd2807SJeff Garzik * PCI/etc. bus probe sem. 5690c6fd2807SJeff Garzik * 5691c6fd2807SJeff Garzik * RETURNS: 5692c6fd2807SJeff Garzik * Number of ports registered. Zero on error (no ports registered). 5693c6fd2807SJeff Garzik */ 5694c6fd2807SJeff Garzik int ata_device_add(const struct ata_probe_ent *ent) 5695c6fd2807SJeff Garzik { 5696c6fd2807SJeff Garzik unsigned int i; 5697c6fd2807SJeff Garzik struct device *dev = ent->dev; 5698cca3974eSJeff Garzik struct ata_host *host; 5699c6fd2807SJeff Garzik int rc; 5700c6fd2807SJeff Garzik 5701c6fd2807SJeff Garzik DPRINTK("ENTER\n"); 570202f076aaSAlan Cox 570302f076aaSAlan Cox if (ent->irq == 0) { 570402f076aaSAlan Cox dev_printk(KERN_ERR, dev, "is not available: No interrupt assigned.\n"); 570502f076aaSAlan Cox return 0; 570602f076aaSAlan Cox } 5707f0d36efdSTejun Heo 5708f0d36efdSTejun Heo if (!devres_open_group(dev, ata_device_add, GFP_KERNEL)) 5709f0d36efdSTejun Heo return 0; 5710f0d36efdSTejun Heo 5711c6fd2807SJeff Garzik /* alloc a container for our list of ATA ports (buses) */ 5712f0d36efdSTejun Heo host = devres_alloc(ata_host_release, sizeof(struct ata_host) + 5713c6fd2807SJeff Garzik (ent->n_ports * sizeof(void *)), GFP_KERNEL); 5714cca3974eSJeff Garzik if (!host) 5715f0d36efdSTejun Heo goto err_out; 5716f0d36efdSTejun Heo devres_add(dev, host); 5717f0d36efdSTejun Heo dev_set_drvdata(dev, host); 5718c6fd2807SJeff Garzik 5719cca3974eSJeff Garzik ata_host_init(host, dev, ent->_host_flags, ent->port_ops); 5720cca3974eSJeff Garzik host->n_ports = ent->n_ports; 5721cca3974eSJeff Garzik host->irq = ent->irq; 5722cca3974eSJeff Garzik host->irq2 = ent->irq2; 57230d5ff566STejun Heo host->iomap = ent->iomap; 5724cca3974eSJeff Garzik host->private_data = ent->private_data; 5725c6fd2807SJeff Garzik 5726c6fd2807SJeff Garzik /* register each port bound to this device */ 5727cca3974eSJeff Garzik for (i = 0; i < host->n_ports; i++) { 5728c6fd2807SJeff Garzik struct ata_port *ap; 5729c6fd2807SJeff Garzik unsigned long xfer_mode_mask; 5730c6fd2807SJeff Garzik int irq_line = ent->irq; 5731c6fd2807SJeff Garzik 5732cca3974eSJeff Garzik ap = ata_port_add(ent, host, i); 5733c38778c3SDave Jones host->ports[i] = ap; 5734c6fd2807SJeff Garzik if (!ap) 5735c6fd2807SJeff Garzik goto err_out; 5736c6fd2807SJeff Garzik 5737c6fd2807SJeff Garzik /* dummy? */ 5738c6fd2807SJeff Garzik if (ent->dummy_port_mask & (1 << i)) { 5739c6fd2807SJeff Garzik ata_port_printk(ap, KERN_INFO, "DUMMY\n"); 5740c6fd2807SJeff Garzik ap->ops = &ata_dummy_port_ops; 5741c6fd2807SJeff Garzik continue; 5742c6fd2807SJeff Garzik } 5743c6fd2807SJeff Garzik 5744c6fd2807SJeff Garzik /* start port */ 5745c6fd2807SJeff Garzik rc = ap->ops->port_start(ap); 5746c6fd2807SJeff Garzik if (rc) { 5747cca3974eSJeff Garzik host->ports[i] = NULL; 5748cca3974eSJeff Garzik scsi_host_put(ap->scsi_host); 5749c6fd2807SJeff Garzik goto err_out; 5750c6fd2807SJeff Garzik } 5751c6fd2807SJeff Garzik 5752c6fd2807SJeff Garzik /* Report the secondary IRQ for second channel legacy */ 5753c6fd2807SJeff Garzik if (i == 1 && ent->irq2) 5754c6fd2807SJeff Garzik irq_line = ent->irq2; 5755c6fd2807SJeff Garzik 5756c6fd2807SJeff Garzik xfer_mode_mask =(ap->udma_mask << ATA_SHIFT_UDMA) | 5757c6fd2807SJeff Garzik (ap->mwdma_mask << ATA_SHIFT_MWDMA) | 5758c6fd2807SJeff Garzik (ap->pio_mask << ATA_SHIFT_PIO); 5759c6fd2807SJeff Garzik 5760c6fd2807SJeff Garzik /* print per-port info to dmesg */ 57610d5ff566STejun Heo ata_port_printk(ap, KERN_INFO, "%cATA max %s cmd 0x%p " 57620d5ff566STejun Heo "ctl 0x%p bmdma 0x%p irq %d\n", 5763c6fd2807SJeff Garzik ap->flags & ATA_FLAG_SATA ? 'S' : 'P', 5764c6fd2807SJeff Garzik ata_mode_string(xfer_mode_mask), 5765c6fd2807SJeff Garzik ap->ioaddr.cmd_addr, 5766c6fd2807SJeff Garzik ap->ioaddr.ctl_addr, 5767c6fd2807SJeff Garzik ap->ioaddr.bmdma_addr, 5768c6fd2807SJeff Garzik irq_line); 5769c6fd2807SJeff Garzik 57700f0a3ad3STejun Heo /* freeze port before requesting IRQ */ 57710f0a3ad3STejun Heo ata_eh_freeze_port(ap); 5772c6fd2807SJeff Garzik } 5773c6fd2807SJeff Garzik 5774c6fd2807SJeff Garzik /* obtain irq, that may be shared between channels */ 5775f0d36efdSTejun Heo rc = devm_request_irq(dev, ent->irq, ent->port_ops->irq_handler, 5776f0d36efdSTejun Heo ent->irq_flags, DRV_NAME, host); 5777c6fd2807SJeff Garzik if (rc) { 5778c6fd2807SJeff Garzik dev_printk(KERN_ERR, dev, "irq %lu request failed: %d\n", 5779c6fd2807SJeff Garzik ent->irq, rc); 5780c6fd2807SJeff Garzik goto err_out; 5781c6fd2807SJeff Garzik } 5782c6fd2807SJeff Garzik 5783c6fd2807SJeff Garzik /* do we have a second IRQ for the other channel, eg legacy mode */ 5784c6fd2807SJeff Garzik if (ent->irq2) { 5785c6fd2807SJeff Garzik /* We will get weird core code crashes later if this is true 5786c6fd2807SJeff Garzik so trap it now */ 5787c6fd2807SJeff Garzik BUG_ON(ent->irq == ent->irq2); 5788c6fd2807SJeff Garzik 5789f0d36efdSTejun Heo rc = devm_request_irq(dev, ent->irq2, 5790f0d36efdSTejun Heo ent->port_ops->irq_handler, ent->irq_flags, 5791cca3974eSJeff Garzik DRV_NAME, host); 5792c6fd2807SJeff Garzik if (rc) { 5793c6fd2807SJeff Garzik dev_printk(KERN_ERR, dev, "irq %lu request failed: %d\n", 5794c6fd2807SJeff Garzik ent->irq2, rc); 5795f0d36efdSTejun Heo goto err_out; 5796c6fd2807SJeff Garzik } 5797c6fd2807SJeff Garzik } 5798c6fd2807SJeff Garzik 5799f0d36efdSTejun Heo /* resource acquisition complete */ 5800b878ca5dSTejun Heo devres_remove_group(dev, ata_device_add); 5801f0d36efdSTejun Heo 5802c6fd2807SJeff Garzik /* perform each probe synchronously */ 5803c6fd2807SJeff Garzik DPRINTK("probe begin\n"); 5804cca3974eSJeff Garzik for (i = 0; i < host->n_ports; i++) { 5805cca3974eSJeff Garzik struct ata_port *ap = host->ports[i]; 5806c6fd2807SJeff Garzik u32 scontrol; 5807c6fd2807SJeff Garzik int rc; 5808c6fd2807SJeff Garzik 5809c6fd2807SJeff Garzik /* init sata_spd_limit to the current value */ 5810c6fd2807SJeff Garzik if (sata_scr_read(ap, SCR_CONTROL, &scontrol) == 0) { 5811c6fd2807SJeff Garzik int spd = (scontrol >> 4) & 0xf; 5812c6fd2807SJeff Garzik ap->hw_sata_spd_limit &= (1 << spd) - 1; 5813c6fd2807SJeff Garzik } 5814c6fd2807SJeff Garzik ap->sata_spd_limit = ap->hw_sata_spd_limit; 5815c6fd2807SJeff Garzik 5816cca3974eSJeff Garzik rc = scsi_add_host(ap->scsi_host, dev); 5817c6fd2807SJeff Garzik if (rc) { 5818c6fd2807SJeff Garzik ata_port_printk(ap, KERN_ERR, "scsi_add_host failed\n"); 5819c6fd2807SJeff Garzik /* FIXME: do something useful here */ 5820c6fd2807SJeff Garzik /* FIXME: handle unconditional calls to 5821c6fd2807SJeff Garzik * scsi_scan_host and ata_host_remove, below, 5822c6fd2807SJeff Garzik * at the very least 5823c6fd2807SJeff Garzik */ 5824c6fd2807SJeff Garzik } 5825c6fd2807SJeff Garzik 5826c6fd2807SJeff Garzik if (ap->ops->error_handler) { 5827c6fd2807SJeff Garzik struct ata_eh_info *ehi = &ap->eh_info; 5828c6fd2807SJeff Garzik unsigned long flags; 5829c6fd2807SJeff Garzik 5830c6fd2807SJeff Garzik ata_port_probe(ap); 5831c6fd2807SJeff Garzik 5832c6fd2807SJeff Garzik /* kick EH for boot probing */ 5833c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 5834c6fd2807SJeff Garzik 5835c6fd2807SJeff Garzik ehi->probe_mask = (1 << ATA_MAX_DEVICES) - 1; 5836c6fd2807SJeff Garzik ehi->action |= ATA_EH_SOFTRESET; 5837c6fd2807SJeff Garzik ehi->flags |= ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET; 5838c6fd2807SJeff Garzik 5839c6fd2807SJeff Garzik ap->pflags |= ATA_PFLAG_LOADING; 5840c6fd2807SJeff Garzik ata_port_schedule_eh(ap); 5841c6fd2807SJeff Garzik 5842c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 5843c6fd2807SJeff Garzik 5844c6fd2807SJeff Garzik /* wait for EH to finish */ 5845c6fd2807SJeff Garzik ata_port_wait_eh(ap); 5846c6fd2807SJeff Garzik } else { 5847c6fd2807SJeff Garzik DPRINTK("ata%u: bus probe begin\n", ap->id); 5848c6fd2807SJeff Garzik rc = ata_bus_probe(ap); 5849c6fd2807SJeff Garzik DPRINTK("ata%u: bus probe end\n", ap->id); 5850c6fd2807SJeff Garzik 5851c6fd2807SJeff Garzik if (rc) { 5852c6fd2807SJeff Garzik /* FIXME: do something useful here? 5853c6fd2807SJeff Garzik * Current libata behavior will 5854c6fd2807SJeff Garzik * tear down everything when 5855c6fd2807SJeff Garzik * the module is removed 5856c6fd2807SJeff Garzik * or the h/w is unplugged. 5857c6fd2807SJeff Garzik */ 5858c6fd2807SJeff Garzik } 5859c6fd2807SJeff Garzik } 5860c6fd2807SJeff Garzik } 5861c6fd2807SJeff Garzik 5862c6fd2807SJeff Garzik /* probes are done, now scan each port's disk(s) */ 5863c6fd2807SJeff Garzik DPRINTK("host probe begin\n"); 5864cca3974eSJeff Garzik for (i = 0; i < host->n_ports; i++) { 5865cca3974eSJeff Garzik struct ata_port *ap = host->ports[i]; 5866c6fd2807SJeff Garzik 5867c6fd2807SJeff Garzik ata_scsi_scan_host(ap); 5868c6fd2807SJeff Garzik } 5869c6fd2807SJeff Garzik 5870c6fd2807SJeff Garzik VPRINTK("EXIT, returning %u\n", ent->n_ports); 5871c6fd2807SJeff Garzik return ent->n_ports; /* success */ 5872c6fd2807SJeff Garzik 5873c6fd2807SJeff Garzik err_out: 5874f0d36efdSTejun Heo devres_release_group(dev, ata_device_add); 5875f0d36efdSTejun Heo dev_set_drvdata(dev, NULL); 5876f0d36efdSTejun Heo VPRINTK("EXIT, returning %d\n", rc); 5877c6fd2807SJeff Garzik return 0; 5878c6fd2807SJeff Garzik } 5879c6fd2807SJeff Garzik 5880c6fd2807SJeff Garzik /** 5881c6fd2807SJeff Garzik * ata_port_detach - Detach ATA port in prepration of device removal 5882c6fd2807SJeff Garzik * @ap: ATA port to be detached 5883c6fd2807SJeff Garzik * 5884c6fd2807SJeff Garzik * Detach all ATA devices and the associated SCSI devices of @ap; 5885c6fd2807SJeff Garzik * then, remove the associated SCSI host. @ap is guaranteed to 5886c6fd2807SJeff Garzik * be quiescent on return from this function. 5887c6fd2807SJeff Garzik * 5888c6fd2807SJeff Garzik * LOCKING: 5889c6fd2807SJeff Garzik * Kernel thread context (may sleep). 5890c6fd2807SJeff Garzik */ 5891c6fd2807SJeff Garzik void ata_port_detach(struct ata_port *ap) 5892c6fd2807SJeff Garzik { 5893c6fd2807SJeff Garzik unsigned long flags; 5894c6fd2807SJeff Garzik int i; 5895c6fd2807SJeff Garzik 5896c6fd2807SJeff Garzik if (!ap->ops->error_handler) 5897c6fd2807SJeff Garzik goto skip_eh; 5898c6fd2807SJeff Garzik 5899c6fd2807SJeff Garzik /* tell EH we're leaving & flush EH */ 5900c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 5901c6fd2807SJeff Garzik ap->pflags |= ATA_PFLAG_UNLOADING; 5902c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 5903c6fd2807SJeff Garzik 5904c6fd2807SJeff Garzik ata_port_wait_eh(ap); 5905c6fd2807SJeff Garzik 5906c6fd2807SJeff Garzik /* EH is now guaranteed to see UNLOADING, so no new device 5907c6fd2807SJeff Garzik * will be attached. Disable all existing devices. 5908c6fd2807SJeff Garzik */ 5909c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 5910c6fd2807SJeff Garzik 5911c6fd2807SJeff Garzik for (i = 0; i < ATA_MAX_DEVICES; i++) 5912c6fd2807SJeff Garzik ata_dev_disable(&ap->device[i]); 5913c6fd2807SJeff Garzik 5914c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 5915c6fd2807SJeff Garzik 5916c6fd2807SJeff Garzik /* Final freeze & EH. All in-flight commands are aborted. EH 5917c6fd2807SJeff Garzik * will be skipped and retrials will be terminated with bad 5918c6fd2807SJeff Garzik * target. 5919c6fd2807SJeff Garzik */ 5920c6fd2807SJeff Garzik spin_lock_irqsave(ap->lock, flags); 5921c6fd2807SJeff Garzik ata_port_freeze(ap); /* won't be thawed */ 5922c6fd2807SJeff Garzik spin_unlock_irqrestore(ap->lock, flags); 5923c6fd2807SJeff Garzik 5924c6fd2807SJeff Garzik ata_port_wait_eh(ap); 5925c6fd2807SJeff Garzik 5926c6fd2807SJeff Garzik /* Flush hotplug task. The sequence is similar to 5927c6fd2807SJeff Garzik * ata_port_flush_task(). 5928c6fd2807SJeff Garzik */ 5929c6fd2807SJeff Garzik flush_workqueue(ata_aux_wq); 5930c6fd2807SJeff Garzik cancel_delayed_work(&ap->hotplug_task); 5931c6fd2807SJeff Garzik flush_workqueue(ata_aux_wq); 5932c6fd2807SJeff Garzik 5933c6fd2807SJeff Garzik skip_eh: 5934c6fd2807SJeff Garzik /* remove the associated SCSI host */ 5935cca3974eSJeff Garzik scsi_remove_host(ap->scsi_host); 5936c6fd2807SJeff Garzik } 5937c6fd2807SJeff Garzik 5938c6fd2807SJeff Garzik /** 59390529c159STejun Heo * ata_host_detach - Detach all ports of an ATA host 59400529c159STejun Heo * @host: Host to detach 59410529c159STejun Heo * 59420529c159STejun Heo * Detach all ports of @host. 59430529c159STejun Heo * 59440529c159STejun Heo * LOCKING: 59450529c159STejun Heo * Kernel thread context (may sleep). 59460529c159STejun Heo */ 59470529c159STejun Heo void ata_host_detach(struct ata_host *host) 59480529c159STejun Heo { 59490529c159STejun Heo int i; 59500529c159STejun Heo 59510529c159STejun Heo for (i = 0; i < host->n_ports; i++) 59520529c159STejun Heo ata_port_detach(host->ports[i]); 59530529c159STejun Heo } 59540529c159STejun Heo 5955c6fd2807SJeff Garzik struct ata_probe_ent * 5956c6fd2807SJeff Garzik ata_probe_ent_alloc(struct device *dev, const struct ata_port_info *port) 5957c6fd2807SJeff Garzik { 5958c6fd2807SJeff Garzik struct ata_probe_ent *probe_ent; 5959c6fd2807SJeff Garzik 5960f0d36efdSTejun Heo /* XXX - the following if can go away once all LLDs are managed */ 5961f0d36efdSTejun Heo if (!list_empty(&dev->devres_head)) 5962f0d36efdSTejun Heo probe_ent = devm_kzalloc(dev, sizeof(*probe_ent), GFP_KERNEL); 5963f0d36efdSTejun Heo else 5964c6fd2807SJeff Garzik probe_ent = kzalloc(sizeof(*probe_ent), GFP_KERNEL); 5965c6fd2807SJeff Garzik if (!probe_ent) { 5966c6fd2807SJeff Garzik printk(KERN_ERR DRV_NAME "(%s): out of memory\n", 5967c6fd2807SJeff Garzik kobject_name(&(dev->kobj))); 5968c6fd2807SJeff Garzik return NULL; 5969c6fd2807SJeff Garzik } 5970c6fd2807SJeff Garzik 5971c6fd2807SJeff Garzik INIT_LIST_HEAD(&probe_ent->node); 5972c6fd2807SJeff Garzik probe_ent->dev = dev; 5973c6fd2807SJeff Garzik 5974c6fd2807SJeff Garzik probe_ent->sht = port->sht; 5975cca3974eSJeff Garzik probe_ent->port_flags = port->flags; 5976c6fd2807SJeff Garzik probe_ent->pio_mask = port->pio_mask; 5977c6fd2807SJeff Garzik probe_ent->mwdma_mask = port->mwdma_mask; 5978c6fd2807SJeff Garzik probe_ent->udma_mask = port->udma_mask; 5979c6fd2807SJeff Garzik probe_ent->port_ops = port->port_ops; 5980d639ca94SJeff Garzik probe_ent->private_data = port->private_data; 5981c6fd2807SJeff Garzik 5982c6fd2807SJeff Garzik return probe_ent; 5983c6fd2807SJeff Garzik } 5984c6fd2807SJeff Garzik 5985c6fd2807SJeff Garzik /** 5986c6fd2807SJeff Garzik * ata_std_ports - initialize ioaddr with standard port offsets. 5987c6fd2807SJeff Garzik * @ioaddr: IO address structure to be initialized 5988c6fd2807SJeff Garzik * 5989c6fd2807SJeff Garzik * Utility function which initializes data_addr, error_addr, 5990c6fd2807SJeff Garzik * feature_addr, nsect_addr, lbal_addr, lbam_addr, lbah_addr, 5991c6fd2807SJeff Garzik * device_addr, status_addr, and command_addr to standard offsets 5992c6fd2807SJeff Garzik * relative to cmd_addr. 5993c6fd2807SJeff Garzik * 5994c6fd2807SJeff Garzik * Does not set ctl_addr, altstatus_addr, bmdma_addr, or scr_addr. 5995c6fd2807SJeff Garzik */ 5996c6fd2807SJeff Garzik 5997c6fd2807SJeff Garzik void ata_std_ports(struct ata_ioports *ioaddr) 5998c6fd2807SJeff Garzik { 5999c6fd2807SJeff Garzik ioaddr->data_addr = ioaddr->cmd_addr + ATA_REG_DATA; 6000c6fd2807SJeff Garzik ioaddr->error_addr = ioaddr->cmd_addr + ATA_REG_ERR; 6001c6fd2807SJeff Garzik ioaddr->feature_addr = ioaddr->cmd_addr + ATA_REG_FEATURE; 6002c6fd2807SJeff Garzik ioaddr->nsect_addr = ioaddr->cmd_addr + ATA_REG_NSECT; 6003c6fd2807SJeff Garzik ioaddr->lbal_addr = ioaddr->cmd_addr + ATA_REG_LBAL; 6004c6fd2807SJeff Garzik ioaddr->lbam_addr = ioaddr->cmd_addr + ATA_REG_LBAM; 6005c6fd2807SJeff Garzik ioaddr->lbah_addr = ioaddr->cmd_addr + ATA_REG_LBAH; 6006c6fd2807SJeff Garzik ioaddr->device_addr = ioaddr->cmd_addr + ATA_REG_DEVICE; 6007c6fd2807SJeff Garzik ioaddr->status_addr = ioaddr->cmd_addr + ATA_REG_STATUS; 6008c6fd2807SJeff Garzik ioaddr->command_addr = ioaddr->cmd_addr + ATA_REG_CMD; 6009c6fd2807SJeff Garzik } 6010c6fd2807SJeff Garzik 6011c6fd2807SJeff Garzik 6012c6fd2807SJeff Garzik #ifdef CONFIG_PCI 6013c6fd2807SJeff Garzik 6014c6fd2807SJeff Garzik /** 6015c6fd2807SJeff Garzik * ata_pci_remove_one - PCI layer callback for device removal 6016c6fd2807SJeff Garzik * @pdev: PCI device that was removed 6017c6fd2807SJeff Garzik * 6018b878ca5dSTejun Heo * PCI layer indicates to libata via this hook that hot-unplug or 6019b878ca5dSTejun Heo * module unload event has occurred. Detach all ports. Resource 6020b878ca5dSTejun Heo * release is handled via devres. 6021c6fd2807SJeff Garzik * 6022c6fd2807SJeff Garzik * LOCKING: 6023c6fd2807SJeff Garzik * Inherited from PCI layer (may sleep). 6024c6fd2807SJeff Garzik */ 6025c6fd2807SJeff Garzik void ata_pci_remove_one(struct pci_dev *pdev) 6026c6fd2807SJeff Garzik { 6027c6fd2807SJeff Garzik struct device *dev = pci_dev_to_dev(pdev); 6028cca3974eSJeff Garzik struct ata_host *host = dev_get_drvdata(dev); 6029c6fd2807SJeff Garzik 6030f0d36efdSTejun Heo ata_host_detach(host); 6031c6fd2807SJeff Garzik } 6032c6fd2807SJeff Garzik 6033c6fd2807SJeff Garzik /* move to PCI subsystem */ 6034c6fd2807SJeff Garzik int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits) 6035c6fd2807SJeff Garzik { 6036c6fd2807SJeff Garzik unsigned long tmp = 0; 6037c6fd2807SJeff Garzik 6038c6fd2807SJeff Garzik switch (bits->width) { 6039c6fd2807SJeff Garzik case 1: { 6040c6fd2807SJeff Garzik u8 tmp8 = 0; 6041c6fd2807SJeff Garzik pci_read_config_byte(pdev, bits->reg, &tmp8); 6042c6fd2807SJeff Garzik tmp = tmp8; 6043c6fd2807SJeff Garzik break; 6044c6fd2807SJeff Garzik } 6045c6fd2807SJeff Garzik case 2: { 6046c6fd2807SJeff Garzik u16 tmp16 = 0; 6047c6fd2807SJeff Garzik pci_read_config_word(pdev, bits->reg, &tmp16); 6048c6fd2807SJeff Garzik tmp = tmp16; 6049c6fd2807SJeff Garzik break; 6050c6fd2807SJeff Garzik } 6051c6fd2807SJeff Garzik case 4: { 6052c6fd2807SJeff Garzik u32 tmp32 = 0; 6053c6fd2807SJeff Garzik pci_read_config_dword(pdev, bits->reg, &tmp32); 6054c6fd2807SJeff Garzik tmp = tmp32; 6055c6fd2807SJeff Garzik break; 6056c6fd2807SJeff Garzik } 6057c6fd2807SJeff Garzik 6058c6fd2807SJeff Garzik default: 6059c6fd2807SJeff Garzik return -EINVAL; 6060c6fd2807SJeff Garzik } 6061c6fd2807SJeff Garzik 6062c6fd2807SJeff Garzik tmp &= bits->mask; 6063c6fd2807SJeff Garzik 6064c6fd2807SJeff Garzik return (tmp == bits->val) ? 1 : 0; 6065c6fd2807SJeff Garzik } 6066c6fd2807SJeff Garzik 6067c6fd2807SJeff Garzik void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg) 6068c6fd2807SJeff Garzik { 6069c6fd2807SJeff Garzik pci_save_state(pdev); 6070c6fd2807SJeff Garzik 6071c6fd2807SJeff Garzik if (mesg.event == PM_EVENT_SUSPEND) { 6072c6fd2807SJeff Garzik pci_disable_device(pdev); 6073c6fd2807SJeff Garzik pci_set_power_state(pdev, PCI_D3hot); 6074c6fd2807SJeff Garzik } 6075c6fd2807SJeff Garzik } 6076c6fd2807SJeff Garzik 6077553c4aa6STejun Heo int ata_pci_device_do_resume(struct pci_dev *pdev) 6078c6fd2807SJeff Garzik { 6079553c4aa6STejun Heo int rc; 6080553c4aa6STejun Heo 6081c6fd2807SJeff Garzik pci_set_power_state(pdev, PCI_D0); 6082c6fd2807SJeff Garzik pci_restore_state(pdev); 6083553c4aa6STejun Heo 6084f0d36efdSTejun Heo rc = pcim_enable_device(pdev); 6085553c4aa6STejun Heo if (rc) { 6086553c4aa6STejun Heo dev_printk(KERN_ERR, &pdev->dev, 6087553c4aa6STejun Heo "failed to enable device after resume (%d)\n", rc); 6088553c4aa6STejun Heo return rc; 6089553c4aa6STejun Heo } 6090553c4aa6STejun Heo 6091c6fd2807SJeff Garzik pci_set_master(pdev); 6092553c4aa6STejun Heo return 0; 6093c6fd2807SJeff Garzik } 6094c6fd2807SJeff Garzik 6095c6fd2807SJeff Garzik int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg) 6096c6fd2807SJeff Garzik { 6097cca3974eSJeff Garzik struct ata_host *host = dev_get_drvdata(&pdev->dev); 6098c6fd2807SJeff Garzik int rc = 0; 6099c6fd2807SJeff Garzik 6100cca3974eSJeff Garzik rc = ata_host_suspend(host, mesg); 6101c6fd2807SJeff Garzik if (rc) 6102c6fd2807SJeff Garzik return rc; 6103c6fd2807SJeff Garzik 6104c6fd2807SJeff Garzik ata_pci_device_do_suspend(pdev, mesg); 6105c6fd2807SJeff Garzik 6106c6fd2807SJeff Garzik return 0; 6107c6fd2807SJeff Garzik } 6108c6fd2807SJeff Garzik 6109c6fd2807SJeff Garzik int ata_pci_device_resume(struct pci_dev *pdev) 6110c6fd2807SJeff Garzik { 6111cca3974eSJeff Garzik struct ata_host *host = dev_get_drvdata(&pdev->dev); 6112553c4aa6STejun Heo int rc; 6113c6fd2807SJeff Garzik 6114553c4aa6STejun Heo rc = ata_pci_device_do_resume(pdev); 6115553c4aa6STejun Heo if (rc == 0) 6116cca3974eSJeff Garzik ata_host_resume(host); 6117553c4aa6STejun Heo return rc; 6118c6fd2807SJeff Garzik } 6119c6fd2807SJeff Garzik #endif /* CONFIG_PCI */ 6120c6fd2807SJeff Garzik 6121c6fd2807SJeff Garzik 6122c6fd2807SJeff Garzik static int __init ata_init(void) 6123c6fd2807SJeff Garzik { 6124c6fd2807SJeff Garzik ata_probe_timeout *= HZ; 6125c6fd2807SJeff Garzik ata_wq = create_workqueue("ata"); 6126c6fd2807SJeff Garzik if (!ata_wq) 6127c6fd2807SJeff Garzik return -ENOMEM; 6128c6fd2807SJeff Garzik 6129c6fd2807SJeff Garzik ata_aux_wq = create_singlethread_workqueue("ata_aux"); 6130c6fd2807SJeff Garzik if (!ata_aux_wq) { 6131c6fd2807SJeff Garzik destroy_workqueue(ata_wq); 6132c6fd2807SJeff Garzik return -ENOMEM; 6133c6fd2807SJeff Garzik } 6134c6fd2807SJeff Garzik 6135c6fd2807SJeff Garzik printk(KERN_DEBUG "libata version " DRV_VERSION " loaded.\n"); 6136c6fd2807SJeff Garzik return 0; 6137c6fd2807SJeff Garzik } 6138c6fd2807SJeff Garzik 6139c6fd2807SJeff Garzik static void __exit ata_exit(void) 6140c6fd2807SJeff Garzik { 6141c6fd2807SJeff Garzik destroy_workqueue(ata_wq); 6142c6fd2807SJeff Garzik destroy_workqueue(ata_aux_wq); 6143c6fd2807SJeff Garzik } 6144c6fd2807SJeff Garzik 6145a4625085SBrian King subsys_initcall(ata_init); 6146c6fd2807SJeff Garzik module_exit(ata_exit); 6147c6fd2807SJeff Garzik 6148c6fd2807SJeff Garzik static unsigned long ratelimit_time; 6149c6fd2807SJeff Garzik static DEFINE_SPINLOCK(ata_ratelimit_lock); 6150c6fd2807SJeff Garzik 6151c6fd2807SJeff Garzik int ata_ratelimit(void) 6152c6fd2807SJeff Garzik { 6153c6fd2807SJeff Garzik int rc; 6154c6fd2807SJeff Garzik unsigned long flags; 6155c6fd2807SJeff Garzik 6156c6fd2807SJeff Garzik spin_lock_irqsave(&ata_ratelimit_lock, flags); 6157c6fd2807SJeff Garzik 6158c6fd2807SJeff Garzik if (time_after(jiffies, ratelimit_time)) { 6159c6fd2807SJeff Garzik rc = 1; 6160c6fd2807SJeff Garzik ratelimit_time = jiffies + (HZ/5); 6161c6fd2807SJeff Garzik } else 6162c6fd2807SJeff Garzik rc = 0; 6163c6fd2807SJeff Garzik 6164c6fd2807SJeff Garzik spin_unlock_irqrestore(&ata_ratelimit_lock, flags); 6165c6fd2807SJeff Garzik 6166c6fd2807SJeff Garzik return rc; 6167c6fd2807SJeff Garzik } 6168c6fd2807SJeff Garzik 6169c6fd2807SJeff Garzik /** 6170c6fd2807SJeff Garzik * ata_wait_register - wait until register value changes 6171c6fd2807SJeff Garzik * @reg: IO-mapped register 6172c6fd2807SJeff Garzik * @mask: Mask to apply to read register value 6173c6fd2807SJeff Garzik * @val: Wait condition 6174c6fd2807SJeff Garzik * @interval_msec: polling interval in milliseconds 6175c6fd2807SJeff Garzik * @timeout_msec: timeout in milliseconds 6176c6fd2807SJeff Garzik * 6177c6fd2807SJeff Garzik * Waiting for some bits of register to change is a common 6178c6fd2807SJeff Garzik * operation for ATA controllers. This function reads 32bit LE 6179c6fd2807SJeff Garzik * IO-mapped register @reg and tests for the following condition. 6180c6fd2807SJeff Garzik * 6181c6fd2807SJeff Garzik * (*@reg & mask) != val 6182c6fd2807SJeff Garzik * 6183c6fd2807SJeff Garzik * If the condition is met, it returns; otherwise, the process is 6184c6fd2807SJeff Garzik * repeated after @interval_msec until timeout. 6185c6fd2807SJeff Garzik * 6186c6fd2807SJeff Garzik * LOCKING: 6187c6fd2807SJeff Garzik * Kernel thread context (may sleep) 6188c6fd2807SJeff Garzik * 6189c6fd2807SJeff Garzik * RETURNS: 6190c6fd2807SJeff Garzik * The final register value. 6191c6fd2807SJeff Garzik */ 6192c6fd2807SJeff Garzik u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val, 6193c6fd2807SJeff Garzik unsigned long interval_msec, 6194c6fd2807SJeff Garzik unsigned long timeout_msec) 6195c6fd2807SJeff Garzik { 6196c6fd2807SJeff Garzik unsigned long timeout; 6197c6fd2807SJeff Garzik u32 tmp; 6198c6fd2807SJeff Garzik 6199c6fd2807SJeff Garzik tmp = ioread32(reg); 6200c6fd2807SJeff Garzik 6201c6fd2807SJeff Garzik /* Calculate timeout _after_ the first read to make sure 6202c6fd2807SJeff Garzik * preceding writes reach the controller before starting to 6203c6fd2807SJeff Garzik * eat away the timeout. 6204c6fd2807SJeff Garzik */ 6205c6fd2807SJeff Garzik timeout = jiffies + (timeout_msec * HZ) / 1000; 6206c6fd2807SJeff Garzik 6207c6fd2807SJeff Garzik while ((tmp & mask) == val && time_before(jiffies, timeout)) { 6208c6fd2807SJeff Garzik msleep(interval_msec); 6209c6fd2807SJeff Garzik tmp = ioread32(reg); 6210c6fd2807SJeff Garzik } 6211c6fd2807SJeff Garzik 6212c6fd2807SJeff Garzik return tmp; 6213c6fd2807SJeff Garzik } 6214c6fd2807SJeff Garzik 6215c6fd2807SJeff Garzik /* 6216c6fd2807SJeff Garzik * Dummy port_ops 6217c6fd2807SJeff Garzik */ 6218c6fd2807SJeff Garzik static void ata_dummy_noret(struct ata_port *ap) { } 6219c6fd2807SJeff Garzik static int ata_dummy_ret0(struct ata_port *ap) { return 0; } 6220c6fd2807SJeff Garzik static void ata_dummy_qc_noret(struct ata_queued_cmd *qc) { } 6221c6fd2807SJeff Garzik 6222c6fd2807SJeff Garzik static u8 ata_dummy_check_status(struct ata_port *ap) 6223c6fd2807SJeff Garzik { 6224c6fd2807SJeff Garzik return ATA_DRDY; 6225c6fd2807SJeff Garzik } 6226c6fd2807SJeff Garzik 6227c6fd2807SJeff Garzik static unsigned int ata_dummy_qc_issue(struct ata_queued_cmd *qc) 6228c6fd2807SJeff Garzik { 6229c6fd2807SJeff Garzik return AC_ERR_SYSTEM; 6230c6fd2807SJeff Garzik } 6231c6fd2807SJeff Garzik 6232c6fd2807SJeff Garzik const struct ata_port_operations ata_dummy_port_ops = { 6233c6fd2807SJeff Garzik .port_disable = ata_port_disable, 6234c6fd2807SJeff Garzik .check_status = ata_dummy_check_status, 6235c6fd2807SJeff Garzik .check_altstatus = ata_dummy_check_status, 6236c6fd2807SJeff Garzik .dev_select = ata_noop_dev_select, 6237c6fd2807SJeff Garzik .qc_prep = ata_noop_qc_prep, 6238c6fd2807SJeff Garzik .qc_issue = ata_dummy_qc_issue, 6239c6fd2807SJeff Garzik .freeze = ata_dummy_noret, 6240c6fd2807SJeff Garzik .thaw = ata_dummy_noret, 6241c6fd2807SJeff Garzik .error_handler = ata_dummy_noret, 6242c6fd2807SJeff Garzik .post_internal_cmd = ata_dummy_qc_noret, 6243c6fd2807SJeff Garzik .irq_clear = ata_dummy_noret, 6244c6fd2807SJeff Garzik .port_start = ata_dummy_ret0, 6245c6fd2807SJeff Garzik .port_stop = ata_dummy_noret, 6246c6fd2807SJeff Garzik }; 6247c6fd2807SJeff Garzik 6248c6fd2807SJeff Garzik /* 6249c6fd2807SJeff Garzik * libata is essentially a library of internal helper functions for 6250c6fd2807SJeff Garzik * low-level ATA host controller drivers. As such, the API/ABI is 6251c6fd2807SJeff Garzik * likely to change as new drivers are added and updated. 6252c6fd2807SJeff Garzik * Do not depend on ABI/API stability. 6253c6fd2807SJeff Garzik */ 6254c6fd2807SJeff Garzik 6255c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(sata_deb_timing_normal); 6256c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(sata_deb_timing_hotplug); 6257c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(sata_deb_timing_long); 6258c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_dummy_port_ops); 6259c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_std_bios_param); 6260c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_std_ports); 6261cca3974eSJeff Garzik EXPORT_SYMBOL_GPL(ata_host_init); 6262c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_device_add); 62630529c159STejun Heo EXPORT_SYMBOL_GPL(ata_host_detach); 6264c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_sg_init); 6265c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_sg_init_one); 6266c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_hsm_move); 6267c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_qc_complete); 6268c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_qc_complete_multiple); 6269c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_qc_issue_prot); 6270c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_tf_load); 6271c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_tf_read); 6272c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_noop_dev_select); 6273c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_std_dev_select); 6274c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_tf_to_fis); 6275c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_tf_from_fis); 6276c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_check_status); 6277c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_altstatus); 6278c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_exec_command); 6279c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_port_start); 6280c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_interrupt); 62810d5ff566STejun Heo EXPORT_SYMBOL_GPL(ata_data_xfer); 62820d5ff566STejun Heo EXPORT_SYMBOL_GPL(ata_data_xfer_noirq); 6283c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_qc_prep); 6284c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_noop_qc_prep); 6285c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_bmdma_setup); 6286c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_bmdma_start); 6287c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_bmdma_irq_clear); 6288c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_bmdma_status); 6289c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_bmdma_stop); 6290c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_bmdma_freeze); 6291c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_bmdma_thaw); 6292c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_bmdma_drive_eh); 6293c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_bmdma_error_handler); 6294c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_bmdma_post_internal_cmd); 6295c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_port_probe); 6296c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(sata_set_spd); 6297c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(sata_phy_debounce); 6298c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(sata_phy_resume); 6299c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(sata_phy_reset); 6300c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(__sata_phy_reset); 6301c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_bus_reset); 6302c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_std_prereset); 6303c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_std_softreset); 6304b6103f6dSTejun Heo EXPORT_SYMBOL_GPL(sata_port_hardreset); 6305c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(sata_std_hardreset); 6306c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_std_postreset); 6307c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_dev_classify); 6308c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_dev_pair); 6309c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_port_disable); 6310c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_ratelimit); 6311c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_wait_register); 6312c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_busy_sleep); 6313c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_port_queue_task); 6314c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_scsi_ioctl); 6315c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_scsi_queuecmd); 6316c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_scsi_slave_config); 6317c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_scsi_slave_destroy); 6318c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_scsi_change_queue_depth); 6319c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_host_intr); 6320c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(sata_scr_valid); 6321c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(sata_scr_read); 6322c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(sata_scr_write); 6323c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(sata_scr_write_flush); 6324c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_port_online); 6325c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_port_offline); 6326cca3974eSJeff Garzik EXPORT_SYMBOL_GPL(ata_host_suspend); 6327cca3974eSJeff Garzik EXPORT_SYMBOL_GPL(ata_host_resume); 6328c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_id_string); 6329c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_id_c_string); 63306919a0a6SAlan Cox EXPORT_SYMBOL_GPL(ata_device_blacklisted); 6331c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_scsi_simulate); 6332c6fd2807SJeff Garzik 6333c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_pio_need_iordy); 6334c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_timing_compute); 6335c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_timing_merge); 6336c6fd2807SJeff Garzik 6337c6fd2807SJeff Garzik #ifdef CONFIG_PCI 6338c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(pci_test_config_bits); 6339c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_pci_init_native_mode); 6340c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_pci_init_one); 6341c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_pci_remove_one); 6342c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_pci_device_do_suspend); 6343c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_pci_device_do_resume); 6344c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_pci_device_suspend); 6345c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_pci_device_resume); 6346c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_pci_default_filter); 6347c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_pci_clear_simplex); 6348c6fd2807SJeff Garzik #endif /* CONFIG_PCI */ 6349c6fd2807SJeff Garzik 6350c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_scsi_device_suspend); 6351c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_scsi_device_resume); 6352c6fd2807SJeff Garzik 6353c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_eng_timeout); 6354c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_port_schedule_eh); 6355c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_port_abort); 6356c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_port_freeze); 6357c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_eh_freeze_port); 6358c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_eh_thaw_port); 6359c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_eh_qc_complete); 6360c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_eh_qc_retry); 6361c6fd2807SJeff Garzik EXPORT_SYMBOL_GPL(ata_do_eh); 636283625006SAkira Iguchi EXPORT_SYMBOL_GPL(ata_irq_on); 636383625006SAkira Iguchi EXPORT_SYMBOL_GPL(ata_dummy_irq_on); 636483625006SAkira Iguchi EXPORT_SYMBOL_GPL(ata_irq_ack); 636583625006SAkira Iguchi EXPORT_SYMBOL_GPL(ata_dummy_irq_ack); 6366a619f981SAkira Iguchi EXPORT_SYMBOL_GPL(ata_dev_try_classify); 6367