2 * libata-core.c - helper library for ATA
4 * Maintained by: Jeff Garzik <jgarzik@pobox.com>
5 * Please ALWAYS copy linux-ide@vger.kernel.org
8 * Copyright 2003-2004 Red Hat, Inc. All rights reserved.
9 * Copyright 2003-2004 Jeff Garzik
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2, or (at your option)
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; see the file COPYING. If not, write to
24 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
27 * libata documentation is available via 'make {ps|pdf}docs',
28 * as Documentation/DocBook/libata.*
30 * Hardware documentation available from http://www.t13.org/ and
31 * http://www.sata-io.org/
33 * Standards documents from:
34 * http://www.t13.org (ATA standards, PCI DMA IDE spec)
35 * http://www.t10.org (SCSI MMC - for ATAPI MMC)
36 * http://www.sata-io.org (SATA)
37 * http://www.compactflash.org (CF)
38 * http://www.qic.org (QIC157 - Tape and DSC)
39 * http://www.ce-ata.org (CE-ATA: not supported)
43 #include <linux/kernel.h>
44 #include <linux/module.h>
45 #include <linux/pci.h>
46 #include <linux/init.h>
47 #include <linux/list.h>
49 #include <linux/spinlock.h>
50 #include <linux/blkdev.h>
51 #include <linux/delay.h>
52 #include <linux/timer.h>
53 #include <linux/interrupt.h>
54 #include <linux/completion.h>
55 #include <linux/suspend.h>
56 #include <linux/workqueue.h>
57 #include <linux/scatterlist.h>
59 #include <linux/async.h>
60 #include <linux/log2.h>
61 #include <linux/slab.h>
62 #include <scsi/scsi.h>
63 #include <scsi/scsi_cmnd.h>
64 #include <scsi/scsi_host.h>
65 #include <linux/libata.h>
66 #include <asm/byteorder.h>
67 #include <linux/cdrom.h>
68 #include <linux/ratelimit.h>
69 #include <linux/pm_runtime.h>
72 #include "libata-transport.h"
74 /* debounce timing parameters in msecs { interval, duration, timeout } */
75 const unsigned long sata_deb_timing_normal[] = { 5, 100, 2000 };
76 const unsigned long sata_deb_timing_hotplug[] = { 25, 500, 2000 };
77 const unsigned long sata_deb_timing_long[] = { 100, 2000, 5000 };
79 const struct ata_port_operations ata_base_port_ops = {
80 .prereset = ata_std_prereset,
81 .postreset = ata_std_postreset,
82 .error_handler = ata_std_error_handler,
85 const struct ata_port_operations sata_port_ops = {
86 .inherits = &ata_base_port_ops,
88 .qc_defer = ata_std_qc_defer,
89 .hardreset = sata_std_hardreset,
92 static unsigned int ata_dev_init_params(struct ata_device *dev,
93 u16 heads, u16 sectors);
94 static unsigned int ata_dev_set_xfermode(struct ata_device *dev);
95 static void ata_dev_xfermask(struct ata_device *dev);
96 static unsigned long ata_dev_blacklisted(const struct ata_device *dev);
98 atomic_t ata_print_id = ATOMIC_INIT(0);
100 struct ata_force_param {
104 unsigned long xfer_mask;
105 unsigned int horkage_on;
106 unsigned int horkage_off;
110 struct ata_force_ent {
113 struct ata_force_param param;
116 static struct ata_force_ent *ata_force_tbl;
117 static int ata_force_tbl_size;
119 static char ata_force_param_buf[PAGE_SIZE] __initdata;
120 /* param_buf is thrown away after initialization, disallow read */
121 module_param_string(force, ata_force_param_buf, sizeof(ata_force_param_buf), 0);
122 MODULE_PARM_DESC(force, "Force ATA configurations including cable type, link speed and transfer mode (see Documentation/kernel-parameters.txt for details)");
124 static int atapi_enabled = 1;
125 module_param(atapi_enabled, int, 0444);
126 MODULE_PARM_DESC(atapi_enabled, "Enable discovery of ATAPI devices (0=off, 1=on [default])");
128 static int atapi_dmadir = 0;
129 module_param(atapi_dmadir, int, 0444);
130 MODULE_PARM_DESC(atapi_dmadir, "Enable ATAPI DMADIR bridge support (0=off [default], 1=on)");
132 int atapi_passthru16 = 1;
133 module_param(atapi_passthru16, int, 0444);
134 MODULE_PARM_DESC(atapi_passthru16, "Enable ATA_16 passthru for ATAPI devices (0=off, 1=on [default])");
137 module_param_named(fua, libata_fua, int, 0444);
138 MODULE_PARM_DESC(fua, "FUA support (0=off [default], 1=on)");
140 static int ata_ignore_hpa;
141 module_param_named(ignore_hpa, ata_ignore_hpa, int, 0644);
142 MODULE_PARM_DESC(ignore_hpa, "Ignore HPA limit (0=keep BIOS limits, 1=ignore limits, using full disk)");
144 static int libata_dma_mask = ATA_DMA_MASK_ATA|ATA_DMA_MASK_ATAPI|ATA_DMA_MASK_CFA;
145 module_param_named(dma, libata_dma_mask, int, 0444);
146 MODULE_PARM_DESC(dma, "DMA enable/disable (0x1==ATA, 0x2==ATAPI, 0x4==CF)");
148 static int ata_probe_timeout;
149 module_param(ata_probe_timeout, int, 0444);
150 MODULE_PARM_DESC(ata_probe_timeout, "Set ATA probing timeout (seconds)");
152 int libata_noacpi = 0;
153 module_param_named(noacpi, libata_noacpi, int, 0444);
154 MODULE_PARM_DESC(noacpi, "Disable the use of ACPI in probe/suspend/resume (0=off [default], 1=on)");
156 int libata_allow_tpm = 0;
157 module_param_named(allow_tpm, libata_allow_tpm, int, 0444);
158 MODULE_PARM_DESC(allow_tpm, "Permit the use of TPM commands (0=off [default], 1=on)");
161 module_param(atapi_an, int, 0444);
162 MODULE_PARM_DESC(atapi_an, "Enable ATAPI AN media presence notification (0=0ff [default], 1=on)");
164 MODULE_AUTHOR("Jeff Garzik");
165 MODULE_DESCRIPTION("Library module for ATA devices");
166 MODULE_LICENSE("GPL");
167 MODULE_VERSION(DRV_VERSION);
170 static bool ata_sstatus_online(u32 sstatus)
172 return (sstatus & 0xf) == 0x3;
176 * ata_link_next - link iteration helper
177 * @link: the previous link, NULL to start
178 * @ap: ATA port containing links to iterate
179 * @mode: iteration mode, one of ATA_LITER_*
182 * Host lock or EH context.
185 * Pointer to the next link.
187 struct ata_link *ata_link_next(struct ata_link *link, struct ata_port *ap,
188 enum ata_link_iter_mode mode)
190 BUG_ON(mode != ATA_LITER_EDGE &&
191 mode != ATA_LITER_PMP_FIRST && mode != ATA_LITER_HOST_FIRST);
193 /* NULL link indicates start of iteration */
197 case ATA_LITER_PMP_FIRST:
198 if (sata_pmp_attached(ap))
201 case ATA_LITER_HOST_FIRST:
205 /* we just iterated over the host link, what's next? */
206 if (link == &ap->link)
208 case ATA_LITER_HOST_FIRST:
209 if (sata_pmp_attached(ap))
212 case ATA_LITER_PMP_FIRST:
213 if (unlikely(ap->slave_link))
214 return ap->slave_link;
220 /* slave_link excludes PMP */
221 if (unlikely(link == ap->slave_link))
224 /* we were over a PMP link */
225 if (++link < ap->pmp_link + ap->nr_pmp_links)
228 if (mode == ATA_LITER_PMP_FIRST)
235 * ata_dev_next - device iteration helper
236 * @dev: the previous device, NULL to start
237 * @link: ATA link containing devices to iterate
238 * @mode: iteration mode, one of ATA_DITER_*
241 * Host lock or EH context.
244 * Pointer to the next device.
246 struct ata_device *ata_dev_next(struct ata_device *dev, struct ata_link *link,
247 enum ata_dev_iter_mode mode)
249 BUG_ON(mode != ATA_DITER_ENABLED && mode != ATA_DITER_ENABLED_REVERSE &&
250 mode != ATA_DITER_ALL && mode != ATA_DITER_ALL_REVERSE);
252 /* NULL dev indicates start of iteration */
255 case ATA_DITER_ENABLED:
259 case ATA_DITER_ENABLED_REVERSE:
260 case ATA_DITER_ALL_REVERSE:
261 dev = link->device + ata_link_max_devices(link) - 1;
266 /* move to the next one */
268 case ATA_DITER_ENABLED:
270 if (++dev < link->device + ata_link_max_devices(link))
273 case ATA_DITER_ENABLED_REVERSE:
274 case ATA_DITER_ALL_REVERSE:
275 if (--dev >= link->device)
281 if ((mode == ATA_DITER_ENABLED || mode == ATA_DITER_ENABLED_REVERSE) &&
282 !ata_dev_enabled(dev))
288 * ata_dev_phys_link - find physical link for a device
289 * @dev: ATA device to look up physical link for
291 * Look up physical link which @dev is attached to. Note that
292 * this is different from @dev->link only when @dev is on slave
293 * link. For all other cases, it's the same as @dev->link.
299 * Pointer to the found physical link.
301 struct ata_link *ata_dev_phys_link(struct ata_device *dev)
303 struct ata_port *ap = dev->link->ap;
309 return ap->slave_link;
313 * ata_force_cbl - force cable type according to libata.force
314 * @ap: ATA port of interest
316 * Force cable type according to libata.force and whine about it.
317 * The last entry which has matching port number is used, so it
318 * can be specified as part of device force parameters. For
319 * example, both "a:40c,1.00:udma4" and "1.00:40c,udma4" have the
325 void ata_force_cbl(struct ata_port *ap)
329 for (i = ata_force_tbl_size - 1; i >= 0; i--) {
330 const struct ata_force_ent *fe = &ata_force_tbl[i];
332 if (fe->port != -1 && fe->port != ap->print_id)
335 if (fe->param.cbl == ATA_CBL_NONE)
338 ap->cbl = fe->param.cbl;
339 ata_port_notice(ap, "FORCE: cable set to %s\n", fe->param.name);
345 * ata_force_link_limits - force link limits according to libata.force
346 * @link: ATA link of interest
348 * Force link flags and SATA spd limit according to libata.force
349 * and whine about it. When only the port part is specified
350 * (e.g. 1:), the limit applies to all links connected to both
351 * the host link and all fan-out ports connected via PMP. If the
352 * device part is specified as 0 (e.g. 1.00:), it specifies the
353 * first fan-out link not the host link. Device number 15 always
354 * points to the host link whether PMP is attached or not. If the
355 * controller has slave link, device number 16 points to it.
360 static void ata_force_link_limits(struct ata_link *link)
362 bool did_spd = false;
363 int linkno = link->pmp;
366 if (ata_is_host_link(link))
369 for (i = ata_force_tbl_size - 1; i >= 0; i--) {
370 const struct ata_force_ent *fe = &ata_force_tbl[i];
372 if (fe->port != -1 && fe->port != link->ap->print_id)
375 if (fe->device != -1 && fe->device != linkno)
378 /* only honor the first spd limit */
379 if (!did_spd && fe->param.spd_limit) {
380 link->hw_sata_spd_limit = (1 << fe->param.spd_limit) - 1;
381 ata_link_notice(link, "FORCE: PHY spd limit set to %s\n",
386 /* let lflags stack */
387 if (fe->param.lflags) {
388 link->flags |= fe->param.lflags;
389 ata_link_notice(link,
390 "FORCE: link flag 0x%x forced -> 0x%x\n",
391 fe->param.lflags, link->flags);
397 * ata_force_xfermask - force xfermask according to libata.force
398 * @dev: ATA device of interest
400 * Force xfer_mask according to libata.force and whine about it.
401 * For consistency with link selection, device number 15 selects
402 * the first device connected to the host link.
407 static void ata_force_xfermask(struct ata_device *dev)
409 int devno = dev->link->pmp + dev->devno;
410 int alt_devno = devno;
413 /* allow n.15/16 for devices attached to host port */
414 if (ata_is_host_link(dev->link))
417 for (i = ata_force_tbl_size - 1; i >= 0; i--) {
418 const struct ata_force_ent *fe = &ata_force_tbl[i];
419 unsigned long pio_mask, mwdma_mask, udma_mask;
421 if (fe->port != -1 && fe->port != dev->link->ap->print_id)
424 if (fe->device != -1 && fe->device != devno &&
425 fe->device != alt_devno)
428 if (!fe->param.xfer_mask)
431 ata_unpack_xfermask(fe->param.xfer_mask,
432 &pio_mask, &mwdma_mask, &udma_mask);
434 dev->udma_mask = udma_mask;
435 else if (mwdma_mask) {
437 dev->mwdma_mask = mwdma_mask;
441 dev->pio_mask = pio_mask;
444 ata_dev_notice(dev, "FORCE: xfer_mask set to %s\n",
451 * ata_force_horkage - force horkage according to libata.force
452 * @dev: ATA device of interest
454 * Force horkage according to libata.force and whine about it.
455 * For consistency with link selection, device number 15 selects
456 * the first device connected to the host link.
461 static void ata_force_horkage(struct ata_device *dev)
463 int devno = dev->link->pmp + dev->devno;
464 int alt_devno = devno;
467 /* allow n.15/16 for devices attached to host port */
468 if (ata_is_host_link(dev->link))
471 for (i = 0; i < ata_force_tbl_size; i++) {
472 const struct ata_force_ent *fe = &ata_force_tbl[i];
474 if (fe->port != -1 && fe->port != dev->link->ap->print_id)
477 if (fe->device != -1 && fe->device != devno &&
478 fe->device != alt_devno)
481 if (!(~dev->horkage & fe->param.horkage_on) &&
482 !(dev->horkage & fe->param.horkage_off))
485 dev->horkage |= fe->param.horkage_on;
486 dev->horkage &= ~fe->param.horkage_off;
488 ata_dev_notice(dev, "FORCE: horkage modified (%s)\n",
494 * atapi_cmd_type - Determine ATAPI command type from SCSI opcode
495 * @opcode: SCSI opcode
497 * Determine ATAPI command type from @opcode.
503 * ATAPI_{READ|WRITE|READ_CD|PASS_THRU|MISC}
505 int atapi_cmd_type(u8 opcode)
514 case GPCMD_WRITE_AND_VERIFY_10:
518 case GPCMD_READ_CD_MSF:
519 return ATAPI_READ_CD;
523 if (atapi_passthru16)
524 return ATAPI_PASS_THRU;
532 * ata_tf_to_fis - Convert ATA taskfile to SATA FIS structure
533 * @tf: Taskfile to convert
534 * @pmp: Port multiplier port
535 * @is_cmd: This FIS is for command
536 * @fis: Buffer into which data will output
538 * Converts a standard ATA taskfile to a Serial ATA
539 * FIS structure (Register - Host to Device).
542 * Inherited from caller.
544 void ata_tf_to_fis(const struct ata_taskfile *tf, u8 pmp, int is_cmd, u8 *fis)
546 fis[0] = 0x27; /* Register - Host to Device FIS */
547 fis[1] = pmp & 0xf; /* Port multiplier number*/
549 fis[1] |= (1 << 7); /* bit 7 indicates Command FIS */
551 fis[2] = tf->command;
552 fis[3] = tf->feature;
559 fis[8] = tf->hob_lbal;
560 fis[9] = tf->hob_lbam;
561 fis[10] = tf->hob_lbah;
562 fis[11] = tf->hob_feature;
565 fis[13] = tf->hob_nsect;
576 * ata_tf_from_fis - Convert SATA FIS to ATA taskfile
577 * @fis: Buffer from which data will be input
578 * @tf: Taskfile to output
580 * Converts a serial ATA FIS structure to a standard ATA taskfile.
583 * Inherited from caller.
586 void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf)
588 tf->command = fis[2]; /* status */
589 tf->feature = fis[3]; /* error */
596 tf->hob_lbal = fis[8];
597 tf->hob_lbam = fis[9];
598 tf->hob_lbah = fis[10];
601 tf->hob_nsect = fis[13];
604 static const u8 ata_rw_cmds[] = {
608 ATA_CMD_READ_MULTI_EXT,
609 ATA_CMD_WRITE_MULTI_EXT,
613 ATA_CMD_WRITE_MULTI_FUA_EXT,
617 ATA_CMD_PIO_READ_EXT,
618 ATA_CMD_PIO_WRITE_EXT,
631 ATA_CMD_WRITE_FUA_EXT
635 * ata_rwcmd_protocol - set taskfile r/w commands and protocol
636 * @tf: command to examine and configure
637 * @dev: device tf belongs to
639 * Examine the device configuration and tf->flags to calculate
640 * the proper read/write commands and protocol to use.
645 static int ata_rwcmd_protocol(struct ata_taskfile *tf, struct ata_device *dev)
649 int index, fua, lba48, write;
651 fua = (tf->flags & ATA_TFLAG_FUA) ? 4 : 0;
652 lba48 = (tf->flags & ATA_TFLAG_LBA48) ? 2 : 0;
653 write = (tf->flags & ATA_TFLAG_WRITE) ? 1 : 0;
655 if (dev->flags & ATA_DFLAG_PIO) {
656 tf->protocol = ATA_PROT_PIO;
657 index = dev->multi_count ? 0 : 8;
658 } else if (lba48 && (dev->link->ap->flags & ATA_FLAG_PIO_LBA48)) {
659 /* Unable to use DMA due to host limitation */
660 tf->protocol = ATA_PROT_PIO;
661 index = dev->multi_count ? 0 : 8;
663 tf->protocol = ATA_PROT_DMA;
667 cmd = ata_rw_cmds[index + fua + lba48 + write];
676 * ata_tf_read_block - Read block address from ATA taskfile
677 * @tf: ATA taskfile of interest
678 * @dev: ATA device @tf belongs to
683 * Read block address from @tf. This function can handle all
684 * three address formats - LBA, LBA48 and CHS. tf->protocol and
685 * flags select the address format to use.
688 * Block address read from @tf.
690 u64 ata_tf_read_block(struct ata_taskfile *tf, struct ata_device *dev)
694 if (tf->flags & ATA_TFLAG_LBA) {
695 if (tf->flags & ATA_TFLAG_LBA48) {
696 block |= (u64)tf->hob_lbah << 40;
697 block |= (u64)tf->hob_lbam << 32;
698 block |= (u64)tf->hob_lbal << 24;
700 block |= (tf->device & 0xf) << 24;
702 block |= tf->lbah << 16;
703 block |= tf->lbam << 8;
708 cyl = tf->lbam | (tf->lbah << 8);
709 head = tf->device & 0xf;
714 "device reported invalid CHS sector 0\n");
715 sect = 1; /* oh well */
718 block = (cyl * dev->heads + head) * dev->sectors + sect - 1;
725 * ata_build_rw_tf - Build ATA taskfile for given read/write request
726 * @tf: Target ATA taskfile
727 * @dev: ATA device @tf belongs to
728 * @block: Block address
729 * @n_block: Number of blocks
730 * @tf_flags: RW/FUA etc...
736 * Build ATA taskfile @tf for read/write request described by
737 * @block, @n_block, @tf_flags and @tag on @dev.
741 * 0 on success, -ERANGE if the request is too large for @dev,
742 * -EINVAL if the request is invalid.
744 int ata_build_rw_tf(struct ata_taskfile *tf, struct ata_device *dev,
745 u64 block, u32 n_block, unsigned int tf_flags,
748 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
749 tf->flags |= tf_flags;
751 if (ata_ncq_enabled(dev) && likely(tag != ATA_TAG_INTERNAL)) {
753 if (!lba_48_ok(block, n_block))
756 tf->protocol = ATA_PROT_NCQ;
757 tf->flags |= ATA_TFLAG_LBA | ATA_TFLAG_LBA48;
759 if (tf->flags & ATA_TFLAG_WRITE)
760 tf->command = ATA_CMD_FPDMA_WRITE;
762 tf->command = ATA_CMD_FPDMA_READ;
764 tf->nsect = tag << 3;
765 tf->hob_feature = (n_block >> 8) & 0xff;
766 tf->feature = n_block & 0xff;
768 tf->hob_lbah = (block >> 40) & 0xff;
769 tf->hob_lbam = (block >> 32) & 0xff;
770 tf->hob_lbal = (block >> 24) & 0xff;
771 tf->lbah = (block >> 16) & 0xff;
772 tf->lbam = (block >> 8) & 0xff;
773 tf->lbal = block & 0xff;
776 if (tf->flags & ATA_TFLAG_FUA)
777 tf->device |= 1 << 7;
778 } else if (dev->flags & ATA_DFLAG_LBA) {
779 tf->flags |= ATA_TFLAG_LBA;
781 if (lba_28_ok(block, n_block)) {
783 tf->device |= (block >> 24) & 0xf;
784 } else if (lba_48_ok(block, n_block)) {
785 if (!(dev->flags & ATA_DFLAG_LBA48))
789 tf->flags |= ATA_TFLAG_LBA48;
791 tf->hob_nsect = (n_block >> 8) & 0xff;
793 tf->hob_lbah = (block >> 40) & 0xff;
794 tf->hob_lbam = (block >> 32) & 0xff;
795 tf->hob_lbal = (block >> 24) & 0xff;
797 /* request too large even for LBA48 */
800 if (unlikely(ata_rwcmd_protocol(tf, dev) < 0))
803 tf->nsect = n_block & 0xff;
805 tf->lbah = (block >> 16) & 0xff;
806 tf->lbam = (block >> 8) & 0xff;
807 tf->lbal = block & 0xff;
809 tf->device |= ATA_LBA;
812 u32 sect, head, cyl, track;
814 /* The request -may- be too large for CHS addressing. */
815 if (!lba_28_ok(block, n_block))
818 if (unlikely(ata_rwcmd_protocol(tf, dev) < 0))
821 /* Convert LBA to CHS */
822 track = (u32)block / dev->sectors;
823 cyl = track / dev->heads;
824 head = track % dev->heads;
825 sect = (u32)block % dev->sectors + 1;
827 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
828 (u32)block, track, cyl, head, sect);
830 /* Check whether the converted CHS can fit.
834 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
837 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
848 * ata_pack_xfermask - Pack pio, mwdma and udma masks into xfer_mask
849 * @pio_mask: pio_mask
850 * @mwdma_mask: mwdma_mask
851 * @udma_mask: udma_mask
853 * Pack @pio_mask, @mwdma_mask and @udma_mask into a single
854 * unsigned int xfer_mask.
862 unsigned long ata_pack_xfermask(unsigned long pio_mask,
863 unsigned long mwdma_mask,
864 unsigned long udma_mask)
866 return ((pio_mask << ATA_SHIFT_PIO) & ATA_MASK_PIO) |
867 ((mwdma_mask << ATA_SHIFT_MWDMA) & ATA_MASK_MWDMA) |
868 ((udma_mask << ATA_SHIFT_UDMA) & ATA_MASK_UDMA);
872 * ata_unpack_xfermask - Unpack xfer_mask into pio, mwdma and udma masks
873 * @xfer_mask: xfer_mask to unpack
874 * @pio_mask: resulting pio_mask
875 * @mwdma_mask: resulting mwdma_mask
876 * @udma_mask: resulting udma_mask
878 * Unpack @xfer_mask into @pio_mask, @mwdma_mask and @udma_mask.
879 * Any NULL distination masks will be ignored.
881 void ata_unpack_xfermask(unsigned long xfer_mask, unsigned long *pio_mask,
882 unsigned long *mwdma_mask, unsigned long *udma_mask)
885 *pio_mask = (xfer_mask & ATA_MASK_PIO) >> ATA_SHIFT_PIO;
887 *mwdma_mask = (xfer_mask & ATA_MASK_MWDMA) >> ATA_SHIFT_MWDMA;
889 *udma_mask = (xfer_mask & ATA_MASK_UDMA) >> ATA_SHIFT_UDMA;
892 static const struct ata_xfer_ent {
896 { ATA_SHIFT_PIO, ATA_NR_PIO_MODES, XFER_PIO_0 },
897 { ATA_SHIFT_MWDMA, ATA_NR_MWDMA_MODES, XFER_MW_DMA_0 },
898 { ATA_SHIFT_UDMA, ATA_NR_UDMA_MODES, XFER_UDMA_0 },
903 * ata_xfer_mask2mode - Find matching XFER_* for the given xfer_mask
904 * @xfer_mask: xfer_mask of interest
906 * Return matching XFER_* value for @xfer_mask. Only the highest
907 * bit of @xfer_mask is considered.
913 * Matching XFER_* value, 0xff if no match found.
915 u8 ata_xfer_mask2mode(unsigned long xfer_mask)
917 int highbit = fls(xfer_mask) - 1;
918 const struct ata_xfer_ent *ent;
920 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
921 if (highbit >= ent->shift && highbit < ent->shift + ent->bits)
922 return ent->base + highbit - ent->shift;
927 * ata_xfer_mode2mask - Find matching xfer_mask for XFER_*
928 * @xfer_mode: XFER_* of interest
930 * Return matching xfer_mask for @xfer_mode.
936 * Matching xfer_mask, 0 if no match found.
938 unsigned long ata_xfer_mode2mask(u8 xfer_mode)
940 const struct ata_xfer_ent *ent;
942 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
943 if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits)
944 return ((2 << (ent->shift + xfer_mode - ent->base)) - 1)
945 & ~((1 << ent->shift) - 1);
950 * ata_xfer_mode2shift - Find matching xfer_shift for XFER_*
951 * @xfer_mode: XFER_* of interest
953 * Return matching xfer_shift for @xfer_mode.
959 * Matching xfer_shift, -1 if no match found.
961 int ata_xfer_mode2shift(unsigned long xfer_mode)
963 const struct ata_xfer_ent *ent;
965 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
966 if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits)
972 * ata_mode_string - convert xfer_mask to string
973 * @xfer_mask: mask of bits supported; only highest bit counts.
975 * Determine string which represents the highest speed
976 * (highest bit in @modemask).
982 * Constant C string representing highest speed listed in
983 * @mode_mask, or the constant C string "<n/a>".
985 const char *ata_mode_string(unsigned long xfer_mask)
987 static const char * const xfer_mode_str[] = {
1011 highbit = fls(xfer_mask) - 1;
1012 if (highbit >= 0 && highbit < ARRAY_SIZE(xfer_mode_str))
1013 return xfer_mode_str[highbit];
1017 const char *sata_spd_string(unsigned int spd)
1019 static const char * const spd_str[] = {
1025 if (spd == 0 || (spd - 1) >= ARRAY_SIZE(spd_str))
1027 return spd_str[spd - 1];
1031 * ata_dev_classify - determine device type based on ATA-spec signature
1032 * @tf: ATA taskfile register set for device to be identified
1034 * Determine from taskfile register contents whether a device is
1035 * ATA or ATAPI, as per "Signature and persistence" section
1036 * of ATA/PI spec (volume 1, sect 5.14).
1042 * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, %ATA_DEV_PMP or
1043 * %ATA_DEV_UNKNOWN the event of failure.
1045 unsigned int ata_dev_classify(const struct ata_taskfile *tf)
1047 /* Apple's open source Darwin code hints that some devices only
1048 * put a proper signature into the LBA mid/high registers,
1049 * So, we only check those. It's sufficient for uniqueness.
1051 * ATA/ATAPI-7 (d1532v1r1: Feb. 19, 2003) specified separate
1052 * signatures for ATA and ATAPI devices attached on SerialATA,
1053 * 0x3c/0xc3 and 0x69/0x96 respectively. However, SerialATA
1054 * spec has never mentioned about using different signatures
1055 * for ATA/ATAPI devices. Then, Serial ATA II: Port
1056 * Multiplier specification began to use 0x69/0x96 to identify
1057 * port multpliers and 0x3c/0xc3 to identify SEMB device.
1058 * ATA/ATAPI-7 dropped descriptions about 0x3c/0xc3 and
1059 * 0x69/0x96 shortly and described them as reserved for
1062 * We follow the current spec and consider that 0x69/0x96
1063 * identifies a port multiplier and 0x3c/0xc3 a SEMB device.
1064 * Unfortunately, WDC WD1600JS-62MHB5 (a hard drive) reports
1065 * SEMB signature. This is worked around in
1066 * ata_dev_read_id().
1068 if ((tf->lbam == 0) && (tf->lbah == 0)) {
1069 DPRINTK("found ATA device by sig\n");
1073 if ((tf->lbam == 0x14) && (tf->lbah == 0xeb)) {
1074 DPRINTK("found ATAPI device by sig\n");
1075 return ATA_DEV_ATAPI;
1078 if ((tf->lbam == 0x69) && (tf->lbah == 0x96)) {
1079 DPRINTK("found PMP device by sig\n");
1083 if ((tf->lbam == 0x3c) && (tf->lbah == 0xc3)) {
1084 DPRINTK("found SEMB device by sig (could be ATA device)\n");
1085 return ATA_DEV_SEMB;
1088 DPRINTK("unknown device\n");
1089 return ATA_DEV_UNKNOWN;
1093 * ata_id_string - Convert IDENTIFY DEVICE page into string
1094 * @id: IDENTIFY DEVICE results we will examine
1095 * @s: string into which data is output
1096 * @ofs: offset into identify device page
1097 * @len: length of string to return. must be an even number.
1099 * The strings in the IDENTIFY DEVICE page are broken up into
1100 * 16-bit chunks. Run through the string, and output each
1101 * 8-bit chunk linearly, regardless of platform.
1107 void ata_id_string(const u16 *id, unsigned char *s,
1108 unsigned int ofs, unsigned int len)
1129 * ata_id_c_string - Convert IDENTIFY DEVICE page into C string
1130 * @id: IDENTIFY DEVICE results we will examine
1131 * @s: string into which data is output
1132 * @ofs: offset into identify device page
1133 * @len: length of string to return. must be an odd number.
1135 * This function is identical to ata_id_string except that it
1136 * trims trailing spaces and terminates the resulting string with
1137 * null. @len must be actual maximum length (even number) + 1.
1142 void ata_id_c_string(const u16 *id, unsigned char *s,
1143 unsigned int ofs, unsigned int len)
1147 ata_id_string(id, s, ofs, len - 1);
1149 p = s + strnlen(s, len - 1);
1150 while (p > s && p[-1] == ' ')
1155 static u64 ata_id_n_sectors(const u16 *id)
1157 if (ata_id_has_lba(id)) {
1158 if (ata_id_has_lba48(id))
1159 return ata_id_u64(id, ATA_ID_LBA_CAPACITY_2);
1161 return ata_id_u32(id, ATA_ID_LBA_CAPACITY);
1163 if (ata_id_current_chs_valid(id))
1164 return id[ATA_ID_CUR_CYLS] * id[ATA_ID_CUR_HEADS] *
1165 id[ATA_ID_CUR_SECTORS];
1167 return id[ATA_ID_CYLS] * id[ATA_ID_HEADS] *
1172 u64 ata_tf_to_lba48(const struct ata_taskfile *tf)
1176 sectors |= ((u64)(tf->hob_lbah & 0xff)) << 40;
1177 sectors |= ((u64)(tf->hob_lbam & 0xff)) << 32;
1178 sectors |= ((u64)(tf->hob_lbal & 0xff)) << 24;
1179 sectors |= (tf->lbah & 0xff) << 16;
1180 sectors |= (tf->lbam & 0xff) << 8;
1181 sectors |= (tf->lbal & 0xff);
1186 u64 ata_tf_to_lba(const struct ata_taskfile *tf)
1190 sectors |= (tf->device & 0x0f) << 24;
1191 sectors |= (tf->lbah & 0xff) << 16;
1192 sectors |= (tf->lbam & 0xff) << 8;
1193 sectors |= (tf->lbal & 0xff);
1199 * ata_read_native_max_address - Read native max address
1200 * @dev: target device
1201 * @max_sectors: out parameter for the result native max address
1203 * Perform an LBA48 or LBA28 native size query upon the device in
1207 * 0 on success, -EACCES if command is aborted by the drive.
1208 * -EIO on other errors.
1210 static int ata_read_native_max_address(struct ata_device *dev, u64 *max_sectors)
1212 unsigned int err_mask;
1213 struct ata_taskfile tf;
1214 int lba48 = ata_id_has_lba48(dev->id);
1216 ata_tf_init(dev, &tf);
1218 /* always clear all address registers */
1219 tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
1222 tf.command = ATA_CMD_READ_NATIVE_MAX_EXT;
1223 tf.flags |= ATA_TFLAG_LBA48;
1225 tf.command = ATA_CMD_READ_NATIVE_MAX;
1227 tf.protocol |= ATA_PROT_NODATA;
1228 tf.device |= ATA_LBA;
1230 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
1233 "failed to read native max address (err_mask=0x%x)\n",
1235 if (err_mask == AC_ERR_DEV && (tf.feature & ATA_ABORTED))
1241 *max_sectors = ata_tf_to_lba48(&tf) + 1;
1243 *max_sectors = ata_tf_to_lba(&tf) + 1;
1244 if (dev->horkage & ATA_HORKAGE_HPA_SIZE)
1250 * ata_set_max_sectors - Set max sectors
1251 * @dev: target device
1252 * @new_sectors: new max sectors value to set for the device
1254 * Set max sectors of @dev to @new_sectors.
1257 * 0 on success, -EACCES if command is aborted or denied (due to
1258 * previous non-volatile SET_MAX) by the drive. -EIO on other
1261 static int ata_set_max_sectors(struct ata_device *dev, u64 new_sectors)
1263 unsigned int err_mask;
1264 struct ata_taskfile tf;
1265 int lba48 = ata_id_has_lba48(dev->id);
1269 ata_tf_init(dev, &tf);
1271 tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
1274 tf.command = ATA_CMD_SET_MAX_EXT;
1275 tf.flags |= ATA_TFLAG_LBA48;
1277 tf.hob_lbal = (new_sectors >> 24) & 0xff;
1278 tf.hob_lbam = (new_sectors >> 32) & 0xff;
1279 tf.hob_lbah = (new_sectors >> 40) & 0xff;
1281 tf.command = ATA_CMD_SET_MAX;
1283 tf.device |= (new_sectors >> 24) & 0xf;
1286 tf.protocol |= ATA_PROT_NODATA;
1287 tf.device |= ATA_LBA;
1289 tf.lbal = (new_sectors >> 0) & 0xff;
1290 tf.lbam = (new_sectors >> 8) & 0xff;
1291 tf.lbah = (new_sectors >> 16) & 0xff;
1293 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
1296 "failed to set max address (err_mask=0x%x)\n",
1298 if (err_mask == AC_ERR_DEV &&
1299 (tf.feature & (ATA_ABORTED | ATA_IDNF)))
1308 * ata_hpa_resize - Resize a device with an HPA set
1309 * @dev: Device to resize
1311 * Read the size of an LBA28 or LBA48 disk with HPA features and resize
1312 * it if required to the full size of the media. The caller must check
1313 * the drive has the HPA feature set enabled.
1316 * 0 on success, -errno on failure.
1318 static int ata_hpa_resize(struct ata_device *dev)
1320 struct ata_eh_context *ehc = &dev->link->eh_context;
1321 int print_info = ehc->i.flags & ATA_EHI_PRINTINFO;
1322 bool unlock_hpa = ata_ignore_hpa || dev->flags & ATA_DFLAG_UNLOCK_HPA;
1323 u64 sectors = ata_id_n_sectors(dev->id);
1327 /* do we need to do it? */
1328 if (dev->class != ATA_DEV_ATA ||
1329 !ata_id_has_lba(dev->id) || !ata_id_hpa_enabled(dev->id) ||
1330 (dev->horkage & ATA_HORKAGE_BROKEN_HPA))
1333 /* read native max address */
1334 rc = ata_read_native_max_address(dev, &native_sectors);
1336 /* If device aborted the command or HPA isn't going to
1337 * be unlocked, skip HPA resizing.
1339 if (rc == -EACCES || !unlock_hpa) {
1341 "HPA support seems broken, skipping HPA handling\n");
1342 dev->horkage |= ATA_HORKAGE_BROKEN_HPA;
1344 /* we can continue if device aborted the command */
1351 dev->n_native_sectors = native_sectors;
1353 /* nothing to do? */
1354 if (native_sectors <= sectors || !unlock_hpa) {
1355 if (!print_info || native_sectors == sectors)
1358 if (native_sectors > sectors)
1360 "HPA detected: current %llu, native %llu\n",
1361 (unsigned long long)sectors,
1362 (unsigned long long)native_sectors);
1363 else if (native_sectors < sectors)
1365 "native sectors (%llu) is smaller than sectors (%llu)\n",
1366 (unsigned long long)native_sectors,
1367 (unsigned long long)sectors);
1371 /* let's unlock HPA */
1372 rc = ata_set_max_sectors(dev, native_sectors);
1373 if (rc == -EACCES) {
1374 /* if device aborted the command, skip HPA resizing */
1376 "device aborted resize (%llu -> %llu), skipping HPA handling\n",
1377 (unsigned long long)sectors,
1378 (unsigned long long)native_sectors);
1379 dev->horkage |= ATA_HORKAGE_BROKEN_HPA;
1384 /* re-read IDENTIFY data */
1385 rc = ata_dev_reread_id(dev, 0);
1388 "failed to re-read IDENTIFY data after HPA resizing\n");
1393 u64 new_sectors = ata_id_n_sectors(dev->id);
1395 "HPA unlocked: %llu -> %llu, native %llu\n",
1396 (unsigned long long)sectors,
1397 (unsigned long long)new_sectors,
1398 (unsigned long long)native_sectors);
1405 * ata_dump_id - IDENTIFY DEVICE info debugging output
1406 * @id: IDENTIFY DEVICE page to dump
1408 * Dump selected 16-bit words from the given IDENTIFY DEVICE
1415 static inline void ata_dump_id(const u16 *id)
1417 DPRINTK("49==0x%04x "
1427 DPRINTK("80==0x%04x "
1437 DPRINTK("88==0x%04x "
1444 * ata_id_xfermask - Compute xfermask from the given IDENTIFY data
1445 * @id: IDENTIFY data to compute xfer mask from
1447 * Compute the xfermask for this device. This is not as trivial
1448 * as it seems if we must consider early devices correctly.
1450 * FIXME: pre IDE drive timing (do we care ?).
1458 unsigned long ata_id_xfermask(const u16 *id)
1460 unsigned long pio_mask, mwdma_mask, udma_mask;
1462 /* Usual case. Word 53 indicates word 64 is valid */
1463 if (id[ATA_ID_FIELD_VALID] & (1 << 1)) {
1464 pio_mask = id[ATA_ID_PIO_MODES] & 0x03;
1468 /* If word 64 isn't valid then Word 51 high byte holds
1469 * the PIO timing number for the maximum. Turn it into
1472 u8 mode = (id[ATA_ID_OLD_PIO_MODES] >> 8) & 0xFF;
1473 if (mode < 5) /* Valid PIO range */
1474 pio_mask = (2 << mode) - 1;
1478 /* But wait.. there's more. Design your standards by
1479 * committee and you too can get a free iordy field to
1480 * process. However its the speeds not the modes that
1481 * are supported... Note drivers using the timing API
1482 * will get this right anyway
1486 mwdma_mask = id[ATA_ID_MWDMA_MODES] & 0x07;
1488 if (ata_id_is_cfa(id)) {
1490 * Process compact flash extended modes
1492 int pio = (id[ATA_ID_CFA_MODES] >> 0) & 0x7;
1493 int dma = (id[ATA_ID_CFA_MODES] >> 3) & 0x7;
1496 pio_mask |= (1 << 5);
1498 pio_mask |= (1 << 6);
1500 mwdma_mask |= (1 << 3);
1502 mwdma_mask |= (1 << 4);
1506 if (id[ATA_ID_FIELD_VALID] & (1 << 2))
1507 udma_mask = id[ATA_ID_UDMA_MODES] & 0xff;
1509 return ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask);
1512 static void ata_qc_complete_internal(struct ata_queued_cmd *qc)
1514 struct completion *waiting = qc->private_data;
1520 * ata_exec_internal_sg - execute libata internal command
1521 * @dev: Device to which the command is sent
1522 * @tf: Taskfile registers for the command and the result
1523 * @cdb: CDB for packet command
1524 * @dma_dir: Data tranfer direction of the command
1525 * @sgl: sg list for the data buffer of the command
1526 * @n_elem: Number of sg entries
1527 * @timeout: Timeout in msecs (0 for default)
1529 * Executes libata internal command with timeout. @tf contains
1530 * command on entry and result on return. Timeout and error
1531 * conditions are reported via return value. No recovery action
1532 * is taken after a command times out. It's caller's duty to
1533 * clean up after timeout.
1536 * None. Should be called with kernel context, might sleep.
1539 * Zero on success, AC_ERR_* mask on failure
1541 unsigned ata_exec_internal_sg(struct ata_device *dev,
1542 struct ata_taskfile *tf, const u8 *cdb,
1543 int dma_dir, struct scatterlist *sgl,
1544 unsigned int n_elem, unsigned long timeout)
1546 struct ata_link *link = dev->link;
1547 struct ata_port *ap = link->ap;
1548 u8 command = tf->command;
1549 int auto_timeout = 0;
1550 struct ata_queued_cmd *qc;
1551 unsigned int tag, preempted_tag;
1552 u32 preempted_sactive, preempted_qc_active;
1553 int preempted_nr_active_links;
1554 DECLARE_COMPLETION_ONSTACK(wait);
1555 unsigned long flags;
1556 unsigned int err_mask;
1559 spin_lock_irqsave(ap->lock, flags);
1561 /* no internal command while frozen */
1562 if (ap->pflags & ATA_PFLAG_FROZEN) {
1563 spin_unlock_irqrestore(ap->lock, flags);
1564 return AC_ERR_SYSTEM;
1567 /* initialize internal qc */
1569 /* XXX: Tag 0 is used for drivers with legacy EH as some
1570 * drivers choke if any other tag is given. This breaks
1571 * ata_tag_internal() test for those drivers. Don't use new
1572 * EH stuff without converting to it.
1574 if (ap->ops->error_handler)
1575 tag = ATA_TAG_INTERNAL;
1579 if (test_and_set_bit(tag, &ap->qc_allocated))
1581 qc = __ata_qc_from_tag(ap, tag);
1589 preempted_tag = link->active_tag;
1590 preempted_sactive = link->sactive;
1591 preempted_qc_active = ap->qc_active;
1592 preempted_nr_active_links = ap->nr_active_links;
1593 link->active_tag = ATA_TAG_POISON;
1596 ap->nr_active_links = 0;
1598 /* prepare & issue qc */
1601 memcpy(qc->cdb, cdb, ATAPI_CDB_LEN);
1602 qc->flags |= ATA_QCFLAG_RESULT_TF;
1603 qc->dma_dir = dma_dir;
1604 if (dma_dir != DMA_NONE) {
1605 unsigned int i, buflen = 0;
1606 struct scatterlist *sg;
1608 for_each_sg(sgl, sg, n_elem, i)
1609 buflen += sg->length;
1611 ata_sg_init(qc, sgl, n_elem);
1612 qc->nbytes = buflen;
1615 qc->private_data = &wait;
1616 qc->complete_fn = ata_qc_complete_internal;
1620 spin_unlock_irqrestore(ap->lock, flags);
1623 if (ata_probe_timeout)
1624 timeout = ata_probe_timeout * 1000;
1626 timeout = ata_internal_cmd_timeout(dev, command);
1631 if (ap->ops->error_handler)
1634 rc = wait_for_completion_timeout(&wait, msecs_to_jiffies(timeout));
1636 if (ap->ops->error_handler)
1639 ata_sff_flush_pio_task(ap);
1642 spin_lock_irqsave(ap->lock, flags);
1644 /* We're racing with irq here. If we lose, the
1645 * following test prevents us from completing the qc
1646 * twice. If we win, the port is frozen and will be
1647 * cleaned up by ->post_internal_cmd().
1649 if (qc->flags & ATA_QCFLAG_ACTIVE) {
1650 qc->err_mask |= AC_ERR_TIMEOUT;
1652 if (ap->ops->error_handler)
1653 ata_port_freeze(ap);
1655 ata_qc_complete(qc);
1657 if (ata_msg_warn(ap))
1658 ata_dev_warn(dev, "qc timeout (cmd 0x%x)\n",
1662 spin_unlock_irqrestore(ap->lock, flags);
1665 /* do post_internal_cmd */
1666 if (ap->ops->post_internal_cmd)
1667 ap->ops->post_internal_cmd(qc);
1669 /* perform minimal error analysis */
1670 if (qc->flags & ATA_QCFLAG_FAILED) {
1671 if (qc->result_tf.command & (ATA_ERR | ATA_DF))
1672 qc->err_mask |= AC_ERR_DEV;
1675 qc->err_mask |= AC_ERR_OTHER;
1677 if (qc->err_mask & ~AC_ERR_OTHER)
1678 qc->err_mask &= ~AC_ERR_OTHER;
1682 spin_lock_irqsave(ap->lock, flags);
1684 *tf = qc->result_tf;
1685 err_mask = qc->err_mask;
1688 link->active_tag = preempted_tag;
1689 link->sactive = preempted_sactive;
1690 ap->qc_active = preempted_qc_active;
1691 ap->nr_active_links = preempted_nr_active_links;
1693 spin_unlock_irqrestore(ap->lock, flags);
1695 if ((err_mask & AC_ERR_TIMEOUT) && auto_timeout)
1696 ata_internal_cmd_timed_out(dev, command);
1702 * ata_exec_internal - execute libata internal command
1703 * @dev: Device to which the command is sent
1704 * @tf: Taskfile registers for the command and the result
1705 * @cdb: CDB for packet command
1706 * @dma_dir: Data tranfer direction of the command
1707 * @buf: Data buffer of the command
1708 * @buflen: Length of data buffer
1709 * @timeout: Timeout in msecs (0 for default)
1711 * Wrapper around ata_exec_internal_sg() which takes simple
1712 * buffer instead of sg list.
1715 * None. Should be called with kernel context, might sleep.
1718 * Zero on success, AC_ERR_* mask on failure
1720 unsigned ata_exec_internal(struct ata_device *dev,
1721 struct ata_taskfile *tf, const u8 *cdb,
1722 int dma_dir, void *buf, unsigned int buflen,
1723 unsigned long timeout)
1725 struct scatterlist *psg = NULL, sg;
1726 unsigned int n_elem = 0;
1728 if (dma_dir != DMA_NONE) {
1730 sg_init_one(&sg, buf, buflen);
1735 return ata_exec_internal_sg(dev, tf, cdb, dma_dir, psg, n_elem,
1740 * ata_do_simple_cmd - execute simple internal command
1741 * @dev: Device to which the command is sent
1742 * @cmd: Opcode to execute
1744 * Execute a 'simple' command, that only consists of the opcode
1745 * 'cmd' itself, without filling any other registers
1748 * Kernel thread context (may sleep).
1751 * Zero on success, AC_ERR_* mask on failure
1753 unsigned int ata_do_simple_cmd(struct ata_device *dev, u8 cmd)
1755 struct ata_taskfile tf;
1757 ata_tf_init(dev, &tf);
1760 tf.flags |= ATA_TFLAG_DEVICE;
1761 tf.protocol = ATA_PROT_NODATA;
1763 return ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
1767 * ata_pio_need_iordy - check if iordy needed
1770 * Check if the current speed of the device requires IORDY. Used
1771 * by various controllers for chip configuration.
1773 unsigned int ata_pio_need_iordy(const struct ata_device *adev)
1775 /* Don't set IORDY if we're preparing for reset. IORDY may
1776 * lead to controller lock up on certain controllers if the
1777 * port is not occupied. See bko#11703 for details.
1779 if (adev->link->ap->pflags & ATA_PFLAG_RESETTING)
1781 /* Controller doesn't support IORDY. Probably a pointless
1782 * check as the caller should know this.
1784 if (adev->link->ap->flags & ATA_FLAG_NO_IORDY)
1786 /* CF spec. r4.1 Table 22 says no iordy on PIO5 and PIO6. */
1787 if (ata_id_is_cfa(adev->id)
1788 && (adev->pio_mode == XFER_PIO_5 || adev->pio_mode == XFER_PIO_6))
1790 /* PIO3 and higher it is mandatory */
1791 if (adev->pio_mode > XFER_PIO_2)
1793 /* We turn it on when possible */
1794 if (ata_id_has_iordy(adev->id))
1800 * ata_pio_mask_no_iordy - Return the non IORDY mask
1803 * Compute the highest mode possible if we are not using iordy. Return
1804 * -1 if no iordy mode is available.
1806 static u32 ata_pio_mask_no_iordy(const struct ata_device *adev)
1808 /* If we have no drive specific rule, then PIO 2 is non IORDY */
1809 if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE */
1810 u16 pio = adev->id[ATA_ID_EIDE_PIO];
1811 /* Is the speed faster than the drive allows non IORDY ? */
1813 /* This is cycle times not frequency - watch the logic! */
1814 if (pio > 240) /* PIO2 is 240nS per cycle */
1815 return 3 << ATA_SHIFT_PIO;
1816 return 7 << ATA_SHIFT_PIO;
1819 return 3 << ATA_SHIFT_PIO;
1823 * ata_do_dev_read_id - default ID read method
1825 * @tf: proposed taskfile
1828 * Issue the identify taskfile and hand back the buffer containing
1829 * identify data. For some RAID controllers and for pre ATA devices
1830 * this function is wrapped or replaced by the driver
1832 unsigned int ata_do_dev_read_id(struct ata_device *dev,
1833 struct ata_taskfile *tf, u16 *id)
1835 return ata_exec_internal(dev, tf, NULL, DMA_FROM_DEVICE,
1836 id, sizeof(id[0]) * ATA_ID_WORDS, 0);
1840 * ata_dev_read_id - Read ID data from the specified device
1841 * @dev: target device
1842 * @p_class: pointer to class of the target device (may be changed)
1843 * @flags: ATA_READID_* flags
1844 * @id: buffer to read IDENTIFY data into
1846 * Read ID data from the specified device. ATA_CMD_ID_ATA is
1847 * performed on ATA devices and ATA_CMD_ID_ATAPI on ATAPI
1848 * devices. This function also issues ATA_CMD_INIT_DEV_PARAMS
1849 * for pre-ATA4 drives.
1851 * FIXME: ATA_CMD_ID_ATA is optional for early drives and right
1852 * now we abort if we hit that case.
1855 * Kernel thread context (may sleep)
1858 * 0 on success, -errno otherwise.
1860 int ata_dev_read_id(struct ata_device *dev, unsigned int *p_class,
1861 unsigned int flags, u16 *id)
1863 struct ata_port *ap = dev->link->ap;
1864 unsigned int class = *p_class;
1865 struct ata_taskfile tf;
1866 unsigned int err_mask = 0;
1868 bool is_semb = class == ATA_DEV_SEMB;
1869 int may_fallback = 1, tried_spinup = 0;
1872 if (ata_msg_ctl(ap))
1873 ata_dev_dbg(dev, "%s: ENTER\n", __func__);
1876 ata_tf_init(dev, &tf);
1880 class = ATA_DEV_ATA; /* some hard drives report SEMB sig */
1882 tf.command = ATA_CMD_ID_ATA;
1885 tf.command = ATA_CMD_ID_ATAPI;
1889 reason = "unsupported class";
1893 tf.protocol = ATA_PROT_PIO;
1895 /* Some devices choke if TF registers contain garbage. Make
1896 * sure those are properly initialized.
1898 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
1900 /* Device presence detection is unreliable on some
1901 * controllers. Always poll IDENTIFY if available.
1903 tf.flags |= ATA_TFLAG_POLLING;
1905 if (ap->ops->read_id)
1906 err_mask = ap->ops->read_id(dev, &tf, id);
1908 err_mask = ata_do_dev_read_id(dev, &tf, id);
1911 if (err_mask & AC_ERR_NODEV_HINT) {
1912 ata_dev_dbg(dev, "NODEV after polling detection\n");
1918 "IDENTIFY failed on device w/ SEMB sig, disabled\n");
1919 /* SEMB is not supported yet */
1920 *p_class = ATA_DEV_SEMB_UNSUP;
1924 if ((err_mask == AC_ERR_DEV) && (tf.feature & ATA_ABORTED)) {
1925 /* Device or controller might have reported
1926 * the wrong device class. Give a shot at the
1927 * other IDENTIFY if the current one is
1928 * aborted by the device.
1933 if (class == ATA_DEV_ATA)
1934 class = ATA_DEV_ATAPI;
1936 class = ATA_DEV_ATA;
1940 /* Control reaches here iff the device aborted
1941 * both flavors of IDENTIFYs which happens
1942 * sometimes with phantom devices.
1945 "both IDENTIFYs aborted, assuming NODEV\n");
1950 reason = "I/O error";
1954 if (dev->horkage & ATA_HORKAGE_DUMP_ID) {
1955 ata_dev_dbg(dev, "dumping IDENTIFY data, "
1956 "class=%d may_fallback=%d tried_spinup=%d\n",
1957 class, may_fallback, tried_spinup);
1958 print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET,
1959 16, 2, id, ATA_ID_WORDS * sizeof(*id), true);
1962 /* Falling back doesn't make sense if ID data was read
1963 * successfully at least once.
1967 swap_buf_le16(id, ATA_ID_WORDS);
1971 reason = "device reports invalid type";
1973 if (class == ATA_DEV_ATA) {
1974 if (!ata_id_is_ata(id) && !ata_id_is_cfa(id))
1976 if (ap->host->flags & ATA_HOST_IGNORE_ATA &&
1977 ata_id_is_ata(id)) {
1979 "host indicates ignore ATA devices, ignored\n");
1983 if (ata_id_is_ata(id))
1987 if (!tried_spinup && (id[2] == 0x37c8 || id[2] == 0x738c)) {
1990 * Drive powered-up in standby mode, and requires a specific
1991 * SET_FEATURES spin-up subcommand before it will accept
1992 * anything other than the original IDENTIFY command.
1994 err_mask = ata_dev_set_feature(dev, SETFEATURES_SPINUP, 0);
1995 if (err_mask && id[2] != 0x738c) {
1997 reason = "SPINUP failed";
2001 * If the drive initially returned incomplete IDENTIFY info,
2002 * we now must reissue the IDENTIFY command.
2004 if (id[2] == 0x37c8)
2008 if ((flags & ATA_READID_POSTRESET) && class == ATA_DEV_ATA) {
2010 * The exact sequence expected by certain pre-ATA4 drives is:
2012 * IDENTIFY (optional in early ATA)
2013 * INITIALIZE DEVICE PARAMETERS (later IDE and ATA)
2015 * Some drives were very specific about that exact sequence.
2017 * Note that ATA4 says lba is mandatory so the second check
2018 * should never trigger.
2020 if (ata_id_major_version(id) < 4 || !ata_id_has_lba(id)) {
2021 err_mask = ata_dev_init_params(dev, id[3], id[6]);
2024 reason = "INIT_DEV_PARAMS failed";
2028 /* current CHS translation info (id[53-58]) might be
2029 * changed. reread the identify device info.
2031 flags &= ~ATA_READID_POSTRESET;
2041 if (ata_msg_warn(ap))
2042 ata_dev_warn(dev, "failed to IDENTIFY (%s, err_mask=0x%x)\n",
2047 static int ata_do_link_spd_horkage(struct ata_device *dev)
2049 struct ata_link *plink = ata_dev_phys_link(dev);
2050 u32 target, target_limit;
2052 if (!sata_scr_valid(plink))
2055 if (dev->horkage & ATA_HORKAGE_1_5_GBPS)
2060 target_limit = (1 << target) - 1;
2062 /* if already on stricter limit, no need to push further */
2063 if (plink->sata_spd_limit <= target_limit)
2066 plink->sata_spd_limit = target_limit;
2068 /* Request another EH round by returning -EAGAIN if link is
2069 * going faster than the target speed. Forward progress is
2070 * guaranteed by setting sata_spd_limit to target_limit above.
2072 if (plink->sata_spd > target) {
2073 ata_dev_info(dev, "applying link speed limit horkage to %s\n",
2074 sata_spd_string(target));
2080 static inline u8 ata_dev_knobble(struct ata_device *dev)
2082 struct ata_port *ap = dev->link->ap;
2084 if (ata_dev_blacklisted(dev) & ATA_HORKAGE_BRIDGE_OK)
2087 return ((ap->cbl == ATA_CBL_SATA) && (!ata_id_is_sata(dev->id)));
2090 static int ata_dev_config_ncq(struct ata_device *dev,
2091 char *desc, size_t desc_sz)
2093 struct ata_port *ap = dev->link->ap;
2094 int hdepth = 0, ddepth = ata_id_queue_depth(dev->id);
2095 unsigned int err_mask;
2098 if (!ata_id_has_ncq(dev->id)) {
2102 if (dev->horkage & ATA_HORKAGE_NONCQ) {
2103 snprintf(desc, desc_sz, "NCQ (not used)");
2106 if (ap->flags & ATA_FLAG_NCQ) {
2107 hdepth = min(ap->scsi_host->can_queue, ATA_MAX_QUEUE - 1);
2108 dev->flags |= ATA_DFLAG_NCQ;
2111 if (!(dev->horkage & ATA_HORKAGE_BROKEN_FPDMA_AA) &&
2112 (ap->flags & ATA_FLAG_FPDMA_AA) &&
2113 ata_id_has_fpdma_aa(dev->id)) {
2114 err_mask = ata_dev_set_feature(dev, SETFEATURES_SATA_ENABLE,
2118 "failed to enable AA (error_mask=0x%x)\n",
2120 if (err_mask != AC_ERR_DEV) {
2121 dev->horkage |= ATA_HORKAGE_BROKEN_FPDMA_AA;
2128 if (hdepth >= ddepth)
2129 snprintf(desc, desc_sz, "NCQ (depth %d)%s", ddepth, aa_desc);
2131 snprintf(desc, desc_sz, "NCQ (depth %d/%d)%s", hdepth,
2137 * ata_dev_configure - Configure the specified ATA/ATAPI device
2138 * @dev: Target device to configure
2140 * Configure @dev according to @dev->id. Generic and low-level
2141 * driver specific fixups are also applied.
2144 * Kernel thread context (may sleep)
2147 * 0 on success, -errno otherwise
2149 int ata_dev_configure(struct ata_device *dev)
2151 struct ata_port *ap = dev->link->ap;
2152 struct ata_eh_context *ehc = &dev->link->eh_context;
2153 int print_info = ehc->i.flags & ATA_EHI_PRINTINFO;
2154 const u16 *id = dev->id;
2155 unsigned long xfer_mask;
2156 char revbuf[7]; /* XYZ-99\0 */
2157 char fwrevbuf[ATA_ID_FW_REV_LEN+1];
2158 char modelbuf[ATA_ID_PROD_LEN+1];
2161 if (!ata_dev_enabled(dev) && ata_msg_info(ap)) {
2162 ata_dev_info(dev, "%s: ENTER/EXIT -- nodev\n", __func__);
2166 if (ata_msg_probe(ap))
2167 ata_dev_dbg(dev, "%s: ENTER\n", __func__);
2170 dev->horkage |= ata_dev_blacklisted(dev);
2171 ata_force_horkage(dev);
2173 if (dev->horkage & ATA_HORKAGE_DISABLE) {
2174 ata_dev_info(dev, "unsupported device, disabling\n");
2175 ata_dev_disable(dev);
2179 if ((!atapi_enabled || (ap->flags & ATA_FLAG_NO_ATAPI)) &&
2180 dev->class == ATA_DEV_ATAPI) {
2181 ata_dev_warn(dev, "WARNING: ATAPI is %s, device ignored\n",
2182 atapi_enabled ? "not supported with this driver"
2184 ata_dev_disable(dev);
2188 rc = ata_do_link_spd_horkage(dev);
2192 /* let ACPI work its magic */
2193 rc = ata_acpi_on_devcfg(dev);
2197 /* massage HPA, do it early as it might change IDENTIFY data */
2198 rc = ata_hpa_resize(dev);
2202 /* print device capabilities */
2203 if (ata_msg_probe(ap))
2205 "%s: cfg 49:%04x 82:%04x 83:%04x 84:%04x "
2206 "85:%04x 86:%04x 87:%04x 88:%04x\n",
2208 id[49], id[82], id[83], id[84],
2209 id[85], id[86], id[87], id[88]);
2211 /* initialize to-be-configured parameters */
2212 dev->flags &= ~ATA_DFLAG_CFG_MASK;
2213 dev->max_sectors = 0;
2219 dev->multi_count = 0;
2222 * common ATA, ATAPI feature tests
2225 /* find max transfer mode; for printk only */
2226 xfer_mask = ata_id_xfermask(id);
2228 if (ata_msg_probe(ap))
2231 /* SCSI only uses 4-char revisions, dump full 8 chars from ATA */
2232 ata_id_c_string(dev->id, fwrevbuf, ATA_ID_FW_REV,
2235 ata_id_c_string(dev->id, modelbuf, ATA_ID_PROD,
2238 /* ATA-specific feature tests */
2239 if (dev->class == ATA_DEV_ATA) {
2240 if (ata_id_is_cfa(id)) {
2241 /* CPRM may make this media unusable */
2242 if (id[ATA_ID_CFA_KEY_MGMT] & 1)
2244 "supports DRM functions and may not be fully accessible\n");
2245 snprintf(revbuf, 7, "CFA");
2247 snprintf(revbuf, 7, "ATA-%d", ata_id_major_version(id));
2248 /* Warn the user if the device has TPM extensions */
2249 if (ata_id_has_tpm(id))
2251 "supports DRM functions and may not be fully accessible\n");
2254 dev->n_sectors = ata_id_n_sectors(id);
2256 /* get current R/W Multiple count setting */
2257 if ((dev->id[47] >> 8) == 0x80 && (dev->id[59] & 0x100)) {
2258 unsigned int max = dev->id[47] & 0xff;
2259 unsigned int cnt = dev->id[59] & 0xff;
2260 /* only recognize/allow powers of two here */
2261 if (is_power_of_2(max) && is_power_of_2(cnt))
2263 dev->multi_count = cnt;
2266 if (ata_id_has_lba(id)) {
2267 const char *lba_desc;
2271 dev->flags |= ATA_DFLAG_LBA;
2272 if (ata_id_has_lba48(id)) {
2273 dev->flags |= ATA_DFLAG_LBA48;
2276 if (dev->n_sectors >= (1UL << 28) &&
2277 ata_id_has_flush_ext(id))
2278 dev->flags |= ATA_DFLAG_FLUSH_EXT;
2282 rc = ata_dev_config_ncq(dev, ncq_desc, sizeof(ncq_desc));
2286 /* print device info to dmesg */
2287 if (ata_msg_drv(ap) && print_info) {
2288 ata_dev_info(dev, "%s: %s, %s, max %s\n",
2289 revbuf, modelbuf, fwrevbuf,
2290 ata_mode_string(xfer_mask));
2292 "%llu sectors, multi %u: %s %s\n",
2293 (unsigned long long)dev->n_sectors,
2294 dev->multi_count, lba_desc, ncq_desc);
2299 /* Default translation */
2300 dev->cylinders = id[1];
2302 dev->sectors = id[6];
2304 if (ata_id_current_chs_valid(id)) {
2305 /* Current CHS translation is valid. */
2306 dev->cylinders = id[54];
2307 dev->heads = id[55];
2308 dev->sectors = id[56];
2311 /* print device info to dmesg */
2312 if (ata_msg_drv(ap) && print_info) {
2313 ata_dev_info(dev, "%s: %s, %s, max %s\n",
2314 revbuf, modelbuf, fwrevbuf,
2315 ata_mode_string(xfer_mask));
2317 "%llu sectors, multi %u, CHS %u/%u/%u\n",
2318 (unsigned long long)dev->n_sectors,
2319 dev->multi_count, dev->cylinders,
2320 dev->heads, dev->sectors);
2327 /* ATAPI-specific feature tests */
2328 else if (dev->class == ATA_DEV_ATAPI) {
2329 const char *cdb_intr_string = "";
2330 const char *atapi_an_string = "";
2331 const char *dma_dir_string = "";
2334 rc = atapi_cdb_len(id);
2335 if ((rc < 12) || (rc > ATAPI_CDB_LEN)) {
2336 if (ata_msg_warn(ap))
2337 ata_dev_warn(dev, "unsupported CDB len\n");
2341 dev->cdb_len = (unsigned int) rc;
2343 /* Enable ATAPI AN if both the host and device have
2344 * the support. If PMP is attached, SNTF is required
2345 * to enable ATAPI AN to discern between PHY status
2346 * changed notifications and ATAPI ANs.
2349 (ap->flags & ATA_FLAG_AN) && ata_id_has_atapi_AN(id) &&
2350 (!sata_pmp_attached(ap) ||
2351 sata_scr_read(&ap->link, SCR_NOTIFICATION, &sntf) == 0)) {
2352 unsigned int err_mask;
2354 /* issue SET feature command to turn this on */
2355 err_mask = ata_dev_set_feature(dev,
2356 SETFEATURES_SATA_ENABLE, SATA_AN);
2359 "failed to enable ATAPI AN (err_mask=0x%x)\n",
2362 dev->flags |= ATA_DFLAG_AN;
2363 atapi_an_string = ", ATAPI AN";
2367 if (ata_id_cdb_intr(dev->id)) {
2368 dev->flags |= ATA_DFLAG_CDB_INTR;
2369 cdb_intr_string = ", CDB intr";
2372 if (atapi_dmadir || atapi_id_dmadir(dev->id)) {
2373 dev->flags |= ATA_DFLAG_DMADIR;
2374 dma_dir_string = ", DMADIR";
2377 /* print device info to dmesg */
2378 if (ata_msg_drv(ap) && print_info)
2380 "ATAPI: %s, %s, max %s%s%s%s\n",
2382 ata_mode_string(xfer_mask),
2383 cdb_intr_string, atapi_an_string,
2387 /* determine max_sectors */
2388 dev->max_sectors = ATA_MAX_SECTORS;
2389 if (dev->flags & ATA_DFLAG_LBA48)
2390 dev->max_sectors = ATA_MAX_SECTORS_LBA48;
2392 /* Limit PATA drive on SATA cable bridge transfers to udma5,
2394 if (ata_dev_knobble(dev)) {
2395 if (ata_msg_drv(ap) && print_info)
2396 ata_dev_info(dev, "applying bridge limits\n");
2397 dev->udma_mask &= ATA_UDMA5;
2398 dev->max_sectors = ATA_MAX_SECTORS;
2401 if ((dev->class == ATA_DEV_ATAPI) &&
2402 (atapi_command_packet_set(id) == TYPE_TAPE)) {
2403 dev->max_sectors = ATA_MAX_SECTORS_TAPE;
2404 dev->horkage |= ATA_HORKAGE_STUCK_ERR;
2407 if (dev->horkage & ATA_HORKAGE_MAX_SEC_128)
2408 dev->max_sectors = min_t(unsigned int, ATA_MAX_SECTORS_128,
2411 if (ap->ops->dev_config)
2412 ap->ops->dev_config(dev);
2414 if (dev->horkage & ATA_HORKAGE_DIAGNOSTIC) {
2415 /* Let the user know. We don't want to disallow opens for
2416 rescue purposes, or in case the vendor is just a blithering
2417 idiot. Do this after the dev_config call as some controllers
2418 with buggy firmware may want to avoid reporting false device
2423 "Drive reports diagnostics failure. This may indicate a drive\n");
2425 "fault or invalid emulation. Contact drive vendor for information.\n");
2429 if ((dev->horkage & ATA_HORKAGE_FIRMWARE_WARN) && print_info) {
2430 ata_dev_warn(dev, "WARNING: device requires firmware update to be fully functional\n");
2431 ata_dev_warn(dev, " contact the vendor or visit http://ata.wiki.kernel.org\n");
2437 if (ata_msg_probe(ap))
2438 ata_dev_dbg(dev, "%s: EXIT, err\n", __func__);
2443 * ata_cable_40wire - return 40 wire cable type
2446 * Helper method for drivers which want to hardwire 40 wire cable
2450 int ata_cable_40wire(struct ata_port *ap)
2452 return ATA_CBL_PATA40;
2456 * ata_cable_80wire - return 80 wire cable type
2459 * Helper method for drivers which want to hardwire 80 wire cable
2463 int ata_cable_80wire(struct ata_port *ap)
2465 return ATA_CBL_PATA80;
2469 * ata_cable_unknown - return unknown PATA cable.
2472 * Helper method for drivers which have no PATA cable detection.
2475 int ata_cable_unknown(struct ata_port *ap)
2477 return ATA_CBL_PATA_UNK;
2481 * ata_cable_ignore - return ignored PATA cable.
2484 * Helper method for drivers which don't use cable type to limit
2487 int ata_cable_ignore(struct ata_port *ap)
2489 return ATA_CBL_PATA_IGN;
2493 * ata_cable_sata - return SATA cable type
2496 * Helper method for drivers which have SATA cables
2499 int ata_cable_sata(struct ata_port *ap)
2501 return ATA_CBL_SATA;
2505 * ata_bus_probe - Reset and probe ATA bus
2508 * Master ATA bus probing function. Initiates a hardware-dependent
2509 * bus reset, then attempts to identify any devices found on
2513 * PCI/etc. bus probe sem.
2516 * Zero on success, negative errno otherwise.
2519 int ata_bus_probe(struct ata_port *ap)
2521 unsigned int classes[ATA_MAX_DEVICES];
2522 int tries[ATA_MAX_DEVICES];
2524 struct ata_device *dev;
2526 ata_for_each_dev(dev, &ap->link, ALL)
2527 tries[dev->devno] = ATA_PROBE_MAX_TRIES;
2530 ata_for_each_dev(dev, &ap->link, ALL) {
2531 /* If we issue an SRST then an ATA drive (not ATAPI)
2532 * may change configuration and be in PIO0 timing. If
2533 * we do a hard reset (or are coming from power on)
2534 * this is true for ATA or ATAPI. Until we've set a
2535 * suitable controller mode we should not touch the
2536 * bus as we may be talking too fast.
2538 dev->pio_mode = XFER_PIO_0;
2540 /* If the controller has a pio mode setup function
2541 * then use it to set the chipset to rights. Don't
2542 * touch the DMA setup as that will be dealt with when
2543 * configuring devices.
2545 if (ap->ops->set_piomode)
2546 ap->ops->set_piomode(ap, dev);
2549 /* reset and determine device classes */
2550 ap->ops->phy_reset(ap);
2552 ata_for_each_dev(dev, &ap->link, ALL) {
2553 if (dev->class != ATA_DEV_UNKNOWN)
2554 classes[dev->devno] = dev->class;
2556 classes[dev->devno] = ATA_DEV_NONE;
2558 dev->class = ATA_DEV_UNKNOWN;
2561 /* read IDENTIFY page and configure devices. We have to do the identify
2562 specific sequence bass-ackwards so that PDIAG- is released by
2565 ata_for_each_dev(dev, &ap->link, ALL_REVERSE) {
2566 if (tries[dev->devno])
2567 dev->class = classes[dev->devno];
2569 if (!ata_dev_enabled(dev))
2572 rc = ata_dev_read_id(dev, &dev->class, ATA_READID_POSTRESET,
2578 /* Now ask for the cable type as PDIAG- should have been released */
2579 if (ap->ops->cable_detect)
2580 ap->cbl = ap->ops->cable_detect(ap);
2582 /* We may have SATA bridge glue hiding here irrespective of
2583 * the reported cable types and sensed types. When SATA
2584 * drives indicate we have a bridge, we don't know which end
2585 * of the link the bridge is which is a problem.
2587 ata_for_each_dev(dev, &ap->link, ENABLED)
2588 if (ata_id_is_sata(dev->id))
2589 ap->cbl = ATA_CBL_SATA;
2591 /* After the identify sequence we can now set up the devices. We do
2592 this in the normal order so that the user doesn't get confused */
2594 ata_for_each_dev(dev, &ap->link, ENABLED) {
2595 ap->link.eh_context.i.flags |= ATA_EHI_PRINTINFO;
2596 rc = ata_dev_configure(dev);
2597 ap->link.eh_context.i.flags &= ~ATA_EHI_PRINTINFO;
2602 /* configure transfer mode */
2603 rc = ata_set_mode(&ap->link, &dev);
2607 ata_for_each_dev(dev, &ap->link, ENABLED)
2613 tries[dev->devno]--;
2617 /* eeek, something went very wrong, give up */
2618 tries[dev->devno] = 0;
2622 /* give it just one more chance */
2623 tries[dev->devno] = min(tries[dev->devno], 1);
2625 if (tries[dev->devno] == 1) {
2626 /* This is the last chance, better to slow
2627 * down than lose it.
2629 sata_down_spd_limit(&ap->link, 0);
2630 ata_down_xfermask_limit(dev, ATA_DNXFER_PIO);
2634 if (!tries[dev->devno])
2635 ata_dev_disable(dev);
2641 * sata_print_link_status - Print SATA link status
2642 * @link: SATA link to printk link status about
2644 * This function prints link speed and status of a SATA link.
2649 static void sata_print_link_status(struct ata_link *link)
2651 u32 sstatus, scontrol, tmp;
2653 if (sata_scr_read(link, SCR_STATUS, &sstatus))
2655 sata_scr_read(link, SCR_CONTROL, &scontrol);
2657 if (ata_phys_link_online(link)) {
2658 tmp = (sstatus >> 4) & 0xf;
2659 ata_link_info(link, "SATA link up %s (SStatus %X SControl %X)\n",
2660 sata_spd_string(tmp), sstatus, scontrol);
2662 ata_link_info(link, "SATA link down (SStatus %X SControl %X)\n",
2668 * ata_dev_pair - return other device on cable
2671 * Obtain the other device on the same cable, or if none is
2672 * present NULL is returned
2675 struct ata_device *ata_dev_pair(struct ata_device *adev)
2677 struct ata_link *link = adev->link;
2678 struct ata_device *pair = &link->device[1 - adev->devno];
2679 if (!ata_dev_enabled(pair))
2685 * sata_down_spd_limit - adjust SATA spd limit downward
2686 * @link: Link to adjust SATA spd limit for
2687 * @spd_limit: Additional limit
2689 * Adjust SATA spd limit of @link downward. Note that this
2690 * function only adjusts the limit. The change must be applied
2691 * using sata_set_spd().
2693 * If @spd_limit is non-zero, the speed is limited to equal to or
2694 * lower than @spd_limit if such speed is supported. If
2695 * @spd_limit is slower than any supported speed, only the lowest
2696 * supported speed is allowed.
2699 * Inherited from caller.
2702 * 0 on success, negative errno on failure
2704 int sata_down_spd_limit(struct ata_link *link, u32 spd_limit)
2706 u32 sstatus, spd, mask;
2709 if (!sata_scr_valid(link))
2712 /* If SCR can be read, use it to determine the current SPD.
2713 * If not, use cached value in link->sata_spd.
2715 rc = sata_scr_read(link, SCR_STATUS, &sstatus);
2716 if (rc == 0 && ata_sstatus_online(sstatus))
2717 spd = (sstatus >> 4) & 0xf;
2719 spd = link->sata_spd;
2721 mask = link->sata_spd_limit;
2725 /* unconditionally mask off the highest bit */
2726 bit = fls(mask) - 1;
2727 mask &= ~(1 << bit);
2729 /* Mask off all speeds higher than or equal to the current
2730 * one. Force 1.5Gbps if current SPD is not available.
2733 mask &= (1 << (spd - 1)) - 1;
2737 /* were we already at the bottom? */
2742 if (mask & ((1 << spd_limit) - 1))
2743 mask &= (1 << spd_limit) - 1;
2745 bit = ffs(mask) - 1;
2750 link->sata_spd_limit = mask;
2752 ata_link_warn(link, "limiting SATA link speed to %s\n",
2753 sata_spd_string(fls(mask)));
2758 static int __sata_set_spd_needed(struct ata_link *link, u32 *scontrol)
2760 struct ata_link *host_link = &link->ap->link;
2761 u32 limit, target, spd;
2763 limit = link->sata_spd_limit;
2765 /* Don't configure downstream link faster than upstream link.
2766 * It doesn't speed up anything and some PMPs choke on such
2769 if (!ata_is_host_link(link) && host_link->sata_spd)
2770 limit &= (1 << host_link->sata_spd) - 1;
2772 if (limit == UINT_MAX)
2775 target = fls(limit);
2777 spd = (*scontrol >> 4) & 0xf;
2778 *scontrol = (*scontrol & ~0xf0) | ((target & 0xf) << 4);
2780 return spd != target;
2784 * sata_set_spd_needed - is SATA spd configuration needed
2785 * @link: Link in question
2787 * Test whether the spd limit in SControl matches
2788 * @link->sata_spd_limit. This function is used to determine
2789 * whether hardreset is necessary to apply SATA spd
2793 * Inherited from caller.
2796 * 1 if SATA spd configuration is needed, 0 otherwise.
2798 static int sata_set_spd_needed(struct ata_link *link)
2802 if (sata_scr_read(link, SCR_CONTROL, &scontrol))
2805 return __sata_set_spd_needed(link, &scontrol);
2809 * sata_set_spd - set SATA spd according to spd limit
2810 * @link: Link to set SATA spd for
2812 * Set SATA spd of @link according to sata_spd_limit.
2815 * Inherited from caller.
2818 * 0 if spd doesn't need to be changed, 1 if spd has been
2819 * changed. Negative errno if SCR registers are inaccessible.
2821 int sata_set_spd(struct ata_link *link)
2826 if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
2829 if (!__sata_set_spd_needed(link, &scontrol))
2832 if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol)))
2839 * This mode timing computation functionality is ported over from
2840 * drivers/ide/ide-timing.h and was originally written by Vojtech Pavlik
2843 * PIO 0-4, MWDMA 0-2 and UDMA 0-6 timings (in nanoseconds).
2844 * These were taken from ATA/ATAPI-6 standard, rev 0a, except
2845 * for UDMA6, which is currently supported only by Maxtor drives.
2847 * For PIO 5/6 MWDMA 3/4 see the CFA specification 3.0.
2850 static const struct ata_timing ata_timing[] = {
2851 /* { XFER_PIO_SLOW, 120, 290, 240, 960, 290, 240, 0, 960, 0 }, */
2852 { XFER_PIO_0, 70, 290, 240, 600, 165, 150, 0, 600, 0 },
2853 { XFER_PIO_1, 50, 290, 93, 383, 125, 100, 0, 383, 0 },
2854 { XFER_PIO_2, 30, 290, 40, 330, 100, 90, 0, 240, 0 },
2855 { XFER_PIO_3, 30, 80, 70, 180, 80, 70, 0, 180, 0 },
2856 { XFER_PIO_4, 25, 70, 25, 120, 70, 25, 0, 120, 0 },
2857 { XFER_PIO_5, 15, 65, 25, 100, 65, 25, 0, 100, 0 },
2858 { XFER_PIO_6, 10, 55, 20, 80, 55, 20, 0, 80, 0 },
2860 { XFER_SW_DMA_0, 120, 0, 0, 0, 480, 480, 50, 960, 0 },
2861 { XFER_SW_DMA_1, 90, 0, 0, 0, 240, 240, 30, 480, 0 },
2862 { XFER_SW_DMA_2, 60, 0, 0, 0, 120, 120, 20, 240, 0 },
2864 { XFER_MW_DMA_0, 60, 0, 0, 0, 215, 215, 20, 480, 0 },
2865 { XFER_MW_DMA_1, 45, 0, 0, 0, 80, 50, 5, 150, 0 },
2866 { XFER_MW_DMA_2, 25, 0, 0, 0, 70, 25, 5, 120, 0 },
2867 { XFER_MW_DMA_3, 25, 0, 0, 0, 65, 25, 5, 100, 0 },
2868 { XFER_MW_DMA_4, 25, 0, 0, 0, 55, 20, 5, 80, 0 },
2870 /* { XFER_UDMA_SLOW, 0, 0, 0, 0, 0, 0, 0, 0, 150 }, */
2871 { XFER_UDMA_0, 0, 0, 0, 0, 0, 0, 0, 0, 120 },
2872 { XFER_UDMA_1, 0, 0, 0, 0, 0, 0, 0, 0, 80 },
2873 { XFER_UDMA_2, 0, 0, 0, 0, 0, 0, 0, 0, 60 },
2874 { XFER_UDMA_3, 0, 0, 0, 0, 0, 0, 0, 0, 45 },
2875 { XFER_UDMA_4, 0, 0, 0, 0, 0, 0, 0, 0, 30 },
2876 { XFER_UDMA_5, 0, 0, 0, 0, 0, 0, 0, 0, 20 },
2877 { XFER_UDMA_6, 0, 0, 0, 0, 0, 0, 0, 0, 15 },
2882 #define ENOUGH(v, unit) (((v)-1)/(unit)+1)
2883 #define EZ(v, unit) ((v)?ENOUGH(v, unit):0)
2885 static void ata_timing_quantize(const struct ata_timing *t, struct ata_timing *q, int T, int UT)
2887 q->setup = EZ(t->setup * 1000, T);
2888 q->act8b = EZ(t->act8b * 1000, T);
2889 q->rec8b = EZ(t->rec8b * 1000, T);
2890 q->cyc8b = EZ(t->cyc8b * 1000, T);
2891 q->active = EZ(t->active * 1000, T);
2892 q->recover = EZ(t->recover * 1000, T);
2893 q->dmack_hold = EZ(t->dmack_hold * 1000, T);
2894 q->cycle = EZ(t->cycle * 1000, T);
2895 q->udma = EZ(t->udma * 1000, UT);
2898 void ata_timing_merge(const struct ata_timing *a, const struct ata_timing *b,
2899 struct ata_timing *m, unsigned int what)
2901 if (what & ATA_TIMING_SETUP ) m->setup = max(a->setup, b->setup);
2902 if (what & ATA_TIMING_ACT8B ) m->act8b = max(a->act8b, b->act8b);
2903 if (what & ATA_TIMING_REC8B ) m->rec8b = max(a->rec8b, b->rec8b);
2904 if (what & ATA_TIMING_CYC8B ) m->cyc8b = max(a->cyc8b, b->cyc8b);
2905 if (what & ATA_TIMING_ACTIVE ) m->active = max(a->active, b->active);
2906 if (what & ATA_TIMING_RECOVER) m->recover = max(a->recover, b->recover);
2907 if (what & ATA_TIMING_DMACK_HOLD) m->dmack_hold = max(a->dmack_hold, b->dmack_hold);
2908 if (what & ATA_TIMING_CYCLE ) m->cycle = max(a->cycle, b->cycle);
2909 if (what & ATA_TIMING_UDMA ) m->udma = max(a->udma, b->udma);
2912 const struct ata_timing *ata_timing_find_mode(u8 xfer_mode)
2914 const struct ata_timing *t = ata_timing;
2916 while (xfer_mode > t->mode)
2919 if (xfer_mode == t->mode)
2924 int ata_timing_compute(struct ata_device *adev, unsigned short speed,
2925 struct ata_timing *t, int T, int UT)
2927 const u16 *id = adev->id;
2928 const struct ata_timing *s;
2929 struct ata_timing p;
2935 if (!(s = ata_timing_find_mode(speed)))
2938 memcpy(t, s, sizeof(*s));
2941 * If the drive is an EIDE drive, it can tell us it needs extended
2942 * PIO/MW_DMA cycle timing.
2945 if (id[ATA_ID_FIELD_VALID] & 2) { /* EIDE drive */
2946 memset(&p, 0, sizeof(p));
2948 if (speed >= XFER_PIO_0 && speed < XFER_SW_DMA_0) {
2949 if (speed <= XFER_PIO_2)
2950 p.cycle = p.cyc8b = id[ATA_ID_EIDE_PIO];
2951 else if ((speed <= XFER_PIO_4) ||
2952 (speed == XFER_PIO_5 && !ata_id_is_cfa(id)))
2953 p.cycle = p.cyc8b = id[ATA_ID_EIDE_PIO_IORDY];
2954 } else if (speed >= XFER_MW_DMA_0 && speed <= XFER_MW_DMA_2)
2955 p.cycle = id[ATA_ID_EIDE_DMA_MIN];
2957 ata_timing_merge(&p, t, t, ATA_TIMING_CYCLE | ATA_TIMING_CYC8B);
2961 * Convert the timing to bus clock counts.
2964 ata_timing_quantize(t, t, T, UT);
2967 * Even in DMA/UDMA modes we still use PIO access for IDENTIFY,
2968 * S.M.A.R.T * and some other commands. We have to ensure that the
2969 * DMA cycle timing is slower/equal than the fastest PIO timing.
2972 if (speed > XFER_PIO_6) {
2973 ata_timing_compute(adev, adev->pio_mode, &p, T, UT);
2974 ata_timing_merge(&p, t, t, ATA_TIMING_ALL);
2978 * Lengthen active & recovery time so that cycle time is correct.
2981 if (t->act8b + t->rec8b < t->cyc8b) {
2982 t->act8b += (t->cyc8b - (t->act8b + t->rec8b)) / 2;
2983 t->rec8b = t->cyc8b - t->act8b;
2986 if (t->active + t->recover < t->cycle) {
2987 t->active += (t->cycle - (t->active + t->recover)) / 2;
2988 t->recover = t->cycle - t->active;
2991 /* In a few cases quantisation may produce enough errors to
2992 leave t->cycle too low for the sum of active and recovery
2993 if so we must correct this */
2994 if (t->active + t->recover > t->cycle)
2995 t->cycle = t->active + t->recover;
3001 * ata_timing_cycle2mode - find xfer mode for the specified cycle duration
3002 * @xfer_shift: ATA_SHIFT_* value for transfer type to examine.
3003 * @cycle: cycle duration in ns
3005 * Return matching xfer mode for @cycle. The returned mode is of
3006 * the transfer type specified by @xfer_shift. If @cycle is too
3007 * slow for @xfer_shift, 0xff is returned. If @cycle is faster
3008 * than the fastest known mode, the fasted mode is returned.
3014 * Matching xfer_mode, 0xff if no match found.
3016 u8 ata_timing_cycle2mode(unsigned int xfer_shift, int cycle)
3018 u8 base_mode = 0xff, last_mode = 0xff;
3019 const struct ata_xfer_ent *ent;
3020 const struct ata_timing *t;
3022 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
3023 if (ent->shift == xfer_shift)
3024 base_mode = ent->base;
3026 for (t = ata_timing_find_mode(base_mode);
3027 t && ata_xfer_mode2shift(t->mode) == xfer_shift; t++) {
3028 unsigned short this_cycle;
3030 switch (xfer_shift) {
3032 case ATA_SHIFT_MWDMA:
3033 this_cycle = t->cycle;
3035 case ATA_SHIFT_UDMA:
3036 this_cycle = t->udma;
3042 if (cycle > this_cycle)
3045 last_mode = t->mode;
3052 * ata_down_xfermask_limit - adjust dev xfer masks downward
3053 * @dev: Device to adjust xfer masks
3054 * @sel: ATA_DNXFER_* selector
3056 * Adjust xfer masks of @dev downward. Note that this function
3057 * does not apply the change. Invoking ata_set_mode() afterwards
3058 * will apply the limit.
3061 * Inherited from caller.
3064 * 0 on success, negative errno on failure
3066 int ata_down_xfermask_limit(struct ata_device *dev, unsigned int sel)
3069 unsigned long orig_mask, xfer_mask;
3070 unsigned long pio_mask, mwdma_mask, udma_mask;
3073 quiet = !!(sel & ATA_DNXFER_QUIET);
3074 sel &= ~ATA_DNXFER_QUIET;
3076 xfer_mask = orig_mask = ata_pack_xfermask(dev->pio_mask,
3079 ata_unpack_xfermask(xfer_mask, &pio_mask, &mwdma_mask, &udma_mask);
3082 case ATA_DNXFER_PIO:
3083 highbit = fls(pio_mask) - 1;
3084 pio_mask &= ~(1 << highbit);
3087 case ATA_DNXFER_DMA:
3089 highbit = fls(udma_mask) - 1;
3090 udma_mask &= ~(1 << highbit);
3093 } else if (mwdma_mask) {
3094 highbit = fls(mwdma_mask) - 1;
3095 mwdma_mask &= ~(1 << highbit);
3101 case ATA_DNXFER_40C:
3102 udma_mask &= ATA_UDMA_MASK_40C;
3105 case ATA_DNXFER_FORCE_PIO0:
3107 case ATA_DNXFER_FORCE_PIO:
3116 xfer_mask &= ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask);
3118 if (!(xfer_mask & ATA_MASK_PIO) || xfer_mask == orig_mask)
3122 if (xfer_mask & (ATA_MASK_MWDMA | ATA_MASK_UDMA))
3123 snprintf(buf, sizeof(buf), "%s:%s",
3124 ata_mode_string(xfer_mask),
3125 ata_mode_string(xfer_mask & ATA_MASK_PIO));
3127 snprintf(buf, sizeof(buf), "%s",
3128 ata_mode_string(xfer_mask));
3130 ata_dev_warn(dev, "limiting speed to %s\n", buf);
3133 ata_unpack_xfermask(xfer_mask, &dev->pio_mask, &dev->mwdma_mask,
3139 static int ata_dev_set_mode(struct ata_device *dev)
3141 struct ata_port *ap = dev->link->ap;
3142 struct ata_eh_context *ehc = &dev->link->eh_context;
3143 const bool nosetxfer = dev->horkage & ATA_HORKAGE_NOSETXFER;
3144 const char *dev_err_whine = "";
3145 int ign_dev_err = 0;
3146 unsigned int err_mask = 0;
3149 dev->flags &= ~ATA_DFLAG_PIO;
3150 if (dev->xfer_shift == ATA_SHIFT_PIO)
3151 dev->flags |= ATA_DFLAG_PIO;
3153 if (nosetxfer && ap->flags & ATA_FLAG_SATA && ata_id_is_sata(dev->id))
3154 dev_err_whine = " (SET_XFERMODE skipped)";
3158 "NOSETXFER but PATA detected - can't "
3159 "skip SETXFER, might malfunction\n");
3160 err_mask = ata_dev_set_xfermode(dev);
3163 if (err_mask & ~AC_ERR_DEV)
3167 ehc->i.flags |= ATA_EHI_POST_SETMODE;
3168 rc = ata_dev_revalidate(dev, ATA_DEV_UNKNOWN, 0);
3169 ehc->i.flags &= ~ATA_EHI_POST_SETMODE;
3173 if (dev->xfer_shift == ATA_SHIFT_PIO) {
3174 /* Old CFA may refuse this command, which is just fine */
3175 if (ata_id_is_cfa(dev->id))
3177 /* Catch several broken garbage emulations plus some pre
3179 if (ata_id_major_version(dev->id) == 0 &&
3180 dev->pio_mode <= XFER_PIO_2)
3182 /* Some very old devices and some bad newer ones fail
3183 any kind of SET_XFERMODE request but support PIO0-2
3184 timings and no IORDY */
3185 if (!ata_id_has_iordy(dev->id) && dev->pio_mode <= XFER_PIO_2)
3188 /* Early MWDMA devices do DMA but don't allow DMA mode setting.
3189 Don't fail an MWDMA0 set IFF the device indicates it is in MWDMA0 */
3190 if (dev->xfer_shift == ATA_SHIFT_MWDMA &&
3191 dev->dma_mode == XFER_MW_DMA_0 &&
3192 (dev->id[63] >> 8) & 1)
3195 /* if the device is actually configured correctly, ignore dev err */
3196 if (dev->xfer_mode == ata_xfer_mask2mode(ata_id_xfermask(dev->id)))
3199 if (err_mask & AC_ERR_DEV) {
3203 dev_err_whine = " (device error ignored)";
3206 DPRINTK("xfer_shift=%u, xfer_mode=0x%x\n",
3207 dev->xfer_shift, (int)dev->xfer_mode);
3209 ata_dev_info(dev, "configured for %s%s\n",
3210 ata_mode_string(ata_xfer_mode2mask(dev->xfer_mode)),
3216 ata_dev_err(dev, "failed to set xfermode (err_mask=0x%x)\n", err_mask);
3221 * ata_do_set_mode - Program timings and issue SET FEATURES - XFER
3222 * @link: link on which timings will be programmed
3223 * @r_failed_dev: out parameter for failed device
3225 * Standard implementation of the function used to tune and set
3226 * ATA device disk transfer mode (PIO3, UDMA6, etc.). If
3227 * ata_dev_set_mode() fails, pointer to the failing device is
3228 * returned in @r_failed_dev.
3231 * PCI/etc. bus probe sem.
3234 * 0 on success, negative errno otherwise
3237 int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev)
3239 struct ata_port *ap = link->ap;
3240 struct ata_device *dev;
3241 int rc = 0, used_dma = 0, found = 0;
3243 /* step 1: calculate xfer_mask */
3244 ata_for_each_dev(dev, link, ENABLED) {
3245 unsigned long pio_mask, dma_mask;
3246 unsigned int mode_mask;
3248 mode_mask = ATA_DMA_MASK_ATA;
3249 if (dev->class == ATA_DEV_ATAPI)
3250 mode_mask = ATA_DMA_MASK_ATAPI;
3251 else if (ata_id_is_cfa(dev->id))
3252 mode_mask = ATA_DMA_MASK_CFA;
3254 ata_dev_xfermask(dev);
3255 ata_force_xfermask(dev);
3257 pio_mask = ata_pack_xfermask(dev->pio_mask, 0, 0);
3259 if (libata_dma_mask & mode_mask)
3260 dma_mask = ata_pack_xfermask(0, dev->mwdma_mask,
3265 dev->pio_mode = ata_xfer_mask2mode(pio_mask);
3266 dev->dma_mode = ata_xfer_mask2mode(dma_mask);
3269 if (ata_dma_enabled(dev))
3275 /* step 2: always set host PIO timings */
3276 ata_for_each_dev(dev, link, ENABLED) {
3277 if (dev->pio_mode == 0xff) {
3278 ata_dev_warn(dev, "no PIO support\n");
3283 dev->xfer_mode = dev->pio_mode;
3284 dev->xfer_shift = ATA_SHIFT_PIO;
3285 if (ap->ops->set_piomode)
3286 ap->ops->set_piomode(ap, dev);
3289 /* step 3: set host DMA timings */
3290 ata_for_each_dev(dev, link, ENABLED) {
3291 if (!ata_dma_enabled(dev))
3294 dev->xfer_mode = dev->dma_mode;
3295 dev->xfer_shift = ata_xfer_mode2shift(dev->dma_mode);
3296 if (ap->ops->set_dmamode)
3297 ap->ops->set_dmamode(ap, dev);
3300 /* step 4: update devices' xfer mode */
3301 ata_for_each_dev(dev, link, ENABLED) {
3302 rc = ata_dev_set_mode(dev);
3307 /* Record simplex status. If we selected DMA then the other
3308 * host channels are not permitted to do so.
3310 if (used_dma && (ap->host->flags & ATA_HOST_SIMPLEX))
3311 ap->host->simplex_claimed = ap;
3315 *r_failed_dev = dev;
3320 * ata_wait_ready - wait for link to become ready
3321 * @link: link to be waited on
3322 * @deadline: deadline jiffies for the operation
3323 * @check_ready: callback to check link readiness
3325 * Wait for @link to become ready. @check_ready should return
3326 * positive number if @link is ready, 0 if it isn't, -ENODEV if
3327 * link doesn't seem to be occupied, other errno for other error
3330 * Transient -ENODEV conditions are allowed for
3331 * ATA_TMOUT_FF_WAIT.
3337 * 0 if @linke is ready before @deadline; otherwise, -errno.
3339 int ata_wait_ready(struct ata_link *link, unsigned long deadline,
3340 int (*check_ready)(struct ata_link *link))
3342 unsigned long start = jiffies;
3343 unsigned long nodev_deadline;
3346 /* choose which 0xff timeout to use, read comment in libata.h */
3347 if (link->ap->host->flags & ATA_HOST_PARALLEL_SCAN)
3348 nodev_deadline = ata_deadline(start, ATA_TMOUT_FF_WAIT_LONG);
3350 nodev_deadline = ata_deadline(start, ATA_TMOUT_FF_WAIT);
3352 /* Slave readiness can't be tested separately from master. On
3353 * M/S emulation configuration, this function should be called
3354 * only on the master and it will handle both master and slave.
3356 WARN_ON(link == link->ap->slave_link);
3358 if (time_after(nodev_deadline, deadline))
3359 nodev_deadline = deadline;
3362 unsigned long now = jiffies;
3365 ready = tmp = check_ready(link);
3370 * -ENODEV could be transient. Ignore -ENODEV if link
3371 * is online. Also, some SATA devices take a long
3372 * time to clear 0xff after reset. Wait for
3373 * ATA_TMOUT_FF_WAIT[_LONG] on -ENODEV if link isn't
3376 * Note that some PATA controllers (pata_ali) explode
3377 * if status register is read more than once when
3378 * there's no device attached.
3380 if (ready == -ENODEV) {
3381 if (ata_link_online(link))
3383 else if ((link->ap->flags & ATA_FLAG_SATA) &&
3384 !ata_link_offline(link) &&
3385 time_before(now, nodev_deadline))
3391 if (time_after(now, deadline))
3394 if (!warned && time_after(now, start + 5 * HZ) &&
3395 (deadline - now > 3 * HZ)) {
3397 "link is slow to respond, please be patient "
3398 "(ready=%d)\n", tmp);
3402 ata_msleep(link->ap, 50);
3407 * ata_wait_after_reset - wait for link to become ready after reset
3408 * @link: link to be waited on
3409 * @deadline: deadline jiffies for the operation
3410 * @check_ready: callback to check link readiness
3412 * Wait for @link to become ready after reset.
3418 * 0 if @linke is ready before @deadline; otherwise, -errno.
3420 int ata_wait_after_reset(struct ata_link *link, unsigned long deadline,
3421 int (*check_ready)(struct ata_link *link))
3423 ata_msleep(link->ap, ATA_WAIT_AFTER_RESET);
3425 return ata_wait_ready(link, deadline, check_ready);
3429 * sata_link_debounce - debounce SATA phy status
3430 * @link: ATA link to debounce SATA phy status for
3431 * @params: timing parameters { interval, duratinon, timeout } in msec
3432 * @deadline: deadline jiffies for the operation
3434 * Make sure SStatus of @link reaches stable state, determined by
3435 * holding the same value where DET is not 1 for @duration polled
3436 * every @interval, before @timeout. Timeout constraints the
3437 * beginning of the stable state. Because DET gets stuck at 1 on
3438 * some controllers after hot unplugging, this functions waits
3439 * until timeout then returns 0 if DET is stable at 1.
3441 * @timeout is further limited by @deadline. The sooner of the
3445 * Kernel thread context (may sleep)
3448 * 0 on success, -errno on failure.
3450 int sata_link_debounce(struct ata_link *link, const unsigned long *params,
3451 unsigned long deadline)
3453 unsigned long interval = params[0];
3454 unsigned long duration = params[1];
3455 unsigned long last_jiffies, t;
3459 t = ata_deadline(jiffies, params[2]);
3460 if (time_before(t, deadline))
3463 if ((rc = sata_scr_read(link, SCR_STATUS, &cur)))
3468 last_jiffies = jiffies;
3471 ata_msleep(link->ap, interval);
3472 if ((rc = sata_scr_read(link, SCR_STATUS, &cur)))
3478 if (cur == 1 && time_before(jiffies, deadline))
3480 if (time_after(jiffies,
3481 ata_deadline(last_jiffies, duration)))
3486 /* unstable, start over */
3488 last_jiffies = jiffies;
3490 /* Check deadline. If debouncing failed, return
3491 * -EPIPE to tell upper layer to lower link speed.
3493 if (time_after(jiffies, deadline))
3499 * sata_link_resume - resume SATA link
3500 * @link: ATA link to resume SATA
3501 * @params: timing parameters { interval, duratinon, timeout } in msec
3502 * @deadline: deadline jiffies for the operation
3504 * Resume SATA phy @link and debounce it.
3507 * Kernel thread context (may sleep)
3510 * 0 on success, -errno on failure.
3512 int sata_link_resume(struct ata_link *link, const unsigned long *params,
3513 unsigned long deadline)
3515 int tries = ATA_LINK_RESUME_TRIES;
3516 u32 scontrol, serror;
3519 if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
3523 * Writes to SControl sometimes get ignored under certain
3524 * controllers (ata_piix SIDPR). Make sure DET actually is
3528 scontrol = (scontrol & 0x0f0) | 0x300;
3529 if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol)))
3532 * Some PHYs react badly if SStatus is pounded
3533 * immediately after resuming. Delay 200ms before
3536 ata_msleep(link->ap, 200);
3538 /* is SControl restored correctly? */
3539 if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
3541 } while ((scontrol & 0xf0f) != 0x300 && --tries);
3543 if ((scontrol & 0xf0f) != 0x300) {
3544 ata_link_warn(link, "failed to resume link (SControl %X)\n",
3549 if (tries < ATA_LINK_RESUME_TRIES)
3550 ata_link_warn(link, "link resume succeeded after %d retries\n",
3551 ATA_LINK_RESUME_TRIES - tries);
3553 if ((rc = sata_link_debounce(link, params, deadline)))
3556 /* clear SError, some PHYs require this even for SRST to work */
3557 if (!(rc = sata_scr_read(link, SCR_ERROR, &serror)))
3558 rc = sata_scr_write(link, SCR_ERROR, serror);
3560 return rc != -EINVAL ? rc : 0;
3564 * sata_link_scr_lpm - manipulate SControl IPM and SPM fields
3565 * @link: ATA link to manipulate SControl for
3566 * @policy: LPM policy to configure
3567 * @spm_wakeup: initiate LPM transition to active state
3569 * Manipulate the IPM field of the SControl register of @link
3570 * according to @policy. If @policy is ATA_LPM_MAX_POWER and
3571 * @spm_wakeup is %true, the SPM field is manipulated to wake up
3572 * the link. This function also clears PHYRDY_CHG before
3579 * 0 on succes, -errno otherwise.
3581 int sata_link_scr_lpm(struct ata_link *link, enum ata_lpm_policy policy,
3584 struct ata_eh_context *ehc = &link->eh_context;
3585 bool woken_up = false;
3589 rc = sata_scr_read(link, SCR_CONTROL, &scontrol);
3594 case ATA_LPM_MAX_POWER:
3595 /* disable all LPM transitions */
3596 scontrol |= (0x3 << 8);
3597 /* initiate transition to active state */
3599 scontrol |= (0x4 << 12);
3603 case ATA_LPM_MED_POWER:
3604 /* allow LPM to PARTIAL */
3605 scontrol &= ~(0x1 << 8);
3606 scontrol |= (0x2 << 8);
3608 case ATA_LPM_MIN_POWER:
3609 if (ata_link_nr_enabled(link) > 0)
3610 /* no restrictions on LPM transitions */
3611 scontrol &= ~(0x3 << 8);
3613 /* empty port, power off */
3615 scontrol |= (0x1 << 2);
3622 rc = sata_scr_write(link, SCR_CONTROL, scontrol);
3626 /* give the link time to transit out of LPM state */
3630 /* clear PHYRDY_CHG from SError */
3631 ehc->i.serror &= ~SERR_PHYRDY_CHG;
3632 return sata_scr_write(link, SCR_ERROR, SERR_PHYRDY_CHG);
3636 * ata_std_prereset - prepare for reset
3637 * @link: ATA link to be reset
3638 * @deadline: deadline jiffies for the operation
3640 * @link is about to be reset. Initialize it. Failure from
3641 * prereset makes libata abort whole reset sequence and give up
3642 * that port, so prereset should be best-effort. It does its
3643 * best to prepare for reset sequence but if things go wrong, it
3644 * should just whine, not fail.
3647 * Kernel thread context (may sleep)
3650 * 0 on success, -errno otherwise.
3652 int ata_std_prereset(struct ata_link *link, unsigned long deadline)
3654 struct ata_port *ap = link->ap;
3655 struct ata_eh_context *ehc = &link->eh_context;
3656 const unsigned long *timing = sata_ehc_deb_timing(ehc);
3659 /* if we're about to do hardreset, nothing more to do */
3660 if (ehc->i.action & ATA_EH_HARDRESET)
3663 /* if SATA, resume link */
3664 if (ap->flags & ATA_FLAG_SATA) {
3665 rc = sata_link_resume(link, timing, deadline);
3666 /* whine about phy resume failure but proceed */
3667 if (rc && rc != -EOPNOTSUPP)
3669 "failed to resume link for reset (errno=%d)\n",
3673 /* no point in trying softreset on offline link */
3674 if (ata_phys_link_offline(link))
3675 ehc->i.action &= ~ATA_EH_SOFTRESET;
3681 * sata_link_hardreset - reset link via SATA phy reset
3682 * @link: link to reset
3683 * @timing: timing parameters { interval, duratinon, timeout } in msec
3684 * @deadline: deadline jiffies for the operation
3685 * @online: optional out parameter indicating link onlineness
3686 * @check_ready: optional callback to check link readiness
3688 * SATA phy-reset @link using DET bits of SControl register.
3689 * After hardreset, link readiness is waited upon using
3690 * ata_wait_ready() if @check_ready is specified. LLDs are
3691 * allowed to not specify @check_ready and wait itself after this
3692 * function returns. Device classification is LLD's
3695 * *@online is set to one iff reset succeeded and @link is online
3699 * Kernel thread context (may sleep)
3702 * 0 on success, -errno otherwise.
3704 int sata_link_hardreset(struct ata_link *link, const unsigned long *timing,
3705 unsigned long deadline,
3706 bool *online, int (*check_ready)(struct ata_link *))
3716 if (sata_set_spd_needed(link)) {
3717 /* SATA spec says nothing about how to reconfigure
3718 * spd. To be on the safe side, turn off phy during
3719 * reconfiguration. This works for at least ICH7 AHCI
3722 if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
3725 scontrol = (scontrol & 0x0f0) | 0x304;
3727 if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol)))
3733 /* issue phy wake/reset */
3734 if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
3737 scontrol = (scontrol & 0x0f0) | 0x301;
3739 if ((rc = sata_scr_write_flush(link, SCR_CONTROL, scontrol)))
3742 /* Couldn't find anything in SATA I/II specs, but AHCI-1.1
3743 * 10.4.2 says at least 1 ms.
3745 ata_msleep(link->ap, 1);
3747 /* bring link back */
3748 rc = sata_link_resume(link, timing, deadline);
3751 /* if link is offline nothing more to do */
3752 if (ata_phys_link_offline(link))
3755 /* Link is online. From this point, -ENODEV too is an error. */
3759 if (sata_pmp_supported(link->ap) && ata_is_host_link(link)) {
3760 /* If PMP is supported, we have to do follow-up SRST.
3761 * Some PMPs don't send D2H Reg FIS after hardreset if
3762 * the first port is empty. Wait only for
3763 * ATA_TMOUT_PMP_SRST_WAIT.
3766 unsigned long pmp_deadline;
3768 pmp_deadline = ata_deadline(jiffies,
3769 ATA_TMOUT_PMP_SRST_WAIT);
3770 if (time_after(pmp_deadline, deadline))
3771 pmp_deadline = deadline;
3772 ata_wait_ready(link, pmp_deadline, check_ready);
3780 rc = ata_wait_ready(link, deadline, check_ready);
3782 if (rc && rc != -EAGAIN) {
3783 /* online is set iff link is online && reset succeeded */
3786 ata_link_err(link, "COMRESET failed (errno=%d)\n", rc);
3788 DPRINTK("EXIT, rc=%d\n", rc);
3793 * sata_std_hardreset - COMRESET w/o waiting or classification
3794 * @link: link to reset
3795 * @class: resulting class of attached device
3796 * @deadline: deadline jiffies for the operation
3798 * Standard SATA COMRESET w/o waiting or classification.
3801 * Kernel thread context (may sleep)
3804 * 0 if link offline, -EAGAIN if link online, -errno on errors.
3806 int sata_std_hardreset(struct ata_link *link, unsigned int *class,
3807 unsigned long deadline)
3809 const unsigned long *timing = sata_ehc_deb_timing(&link->eh_context);
3814 rc = sata_link_hardreset(link, timing, deadline, &online, NULL);
3815 return online ? -EAGAIN : rc;
3819 * ata_std_postreset - standard postreset callback
3820 * @link: the target ata_link
3821 * @classes: classes of attached devices
3823 * This function is invoked after a successful reset. Note that
3824 * the device might have been reset more than once using
3825 * different reset methods before postreset is invoked.
3828 * Kernel thread context (may sleep)
3830 void ata_std_postreset(struct ata_link *link, unsigned int *classes)
3836 /* reset complete, clear SError */
3837 if (!sata_scr_read(link, SCR_ERROR, &serror))
3838 sata_scr_write(link, SCR_ERROR, serror);
3840 /* print link status */
3841 sata_print_link_status(link);
3847 * ata_dev_same_device - Determine whether new ID matches configured device
3848 * @dev: device to compare against
3849 * @new_class: class of the new device
3850 * @new_id: IDENTIFY page of the new device
3852 * Compare @new_class and @new_id against @dev and determine
3853 * whether @dev is the device indicated by @new_class and
3860 * 1 if @dev matches @new_class and @new_id, 0 otherwise.
3862 static int ata_dev_same_device(struct ata_device *dev, unsigned int new_class,
3865 const u16 *old_id = dev->id;
3866 unsigned char model[2][ATA_ID_PROD_LEN + 1];
3867 unsigned char serial[2][ATA_ID_SERNO_LEN + 1];
3869 if (dev->class != new_class) {
3870 ata_dev_info(dev, "class mismatch %d != %d\n",
3871 dev->class, new_class);
3875 ata_id_c_string(old_id, model[0], ATA_ID_PROD, sizeof(model[0]));
3876 ata_id_c_string(new_id, model[1], ATA_ID_PROD, sizeof(model[1]));
3877 ata_id_c_string(old_id, serial[0], ATA_ID_SERNO, sizeof(serial[0]));
3878 ata_id_c_string(new_id, serial[1], ATA_ID_SERNO, sizeof(serial[1]));
3880 if (strcmp(model[0], model[1])) {
3881 ata_dev_info(dev, "model number mismatch '%s' != '%s'\n",
3882 model[0], model[1]);
3886 if (strcmp(serial[0], serial[1])) {
3887 ata_dev_info(dev, "serial number mismatch '%s' != '%s'\n",
3888 serial[0], serial[1]);
3896 * ata_dev_reread_id - Re-read IDENTIFY data
3897 * @dev: target ATA device
3898 * @readid_flags: read ID flags
3900 * Re-read IDENTIFY page and make sure @dev is still attached to
3904 * Kernel thread context (may sleep)
3907 * 0 on success, negative errno otherwise
3909 int ata_dev_reread_id(struct ata_device *dev, unsigned int readid_flags)
3911 unsigned int class = dev->class;
3912 u16 *id = (void *)dev->link->ap->sector_buf;
3916 rc = ata_dev_read_id(dev, &class, readid_flags, id);
3920 /* is the device still there? */
3921 if (!ata_dev_same_device(dev, class, id))
3924 memcpy(dev->id, id, sizeof(id[0]) * ATA_ID_WORDS);
3929 * ata_dev_revalidate - Revalidate ATA device
3930 * @dev: device to revalidate
3931 * @new_class: new class code
3932 * @readid_flags: read ID flags
3934 * Re-read IDENTIFY page, make sure @dev is still attached to the
3935 * port and reconfigure it according to the new IDENTIFY page.
3938 * Kernel thread context (may sleep)
3941 * 0 on success, negative errno otherwise
3943 int ata_dev_revalidate(struct ata_device *dev, unsigned int new_class,
3944 unsigned int readid_flags)
3946 u64 n_sectors = dev->n_sectors;
3947 u64 n_native_sectors = dev->n_native_sectors;
3950 if (!ata_dev_enabled(dev))
3953 /* fail early if !ATA && !ATAPI to avoid issuing [P]IDENTIFY to PMP */
3954 if (ata_class_enabled(new_class) &&
3955 new_class != ATA_DEV_ATA &&
3956 new_class != ATA_DEV_ATAPI &&
3957 new_class != ATA_DEV_SEMB) {
3958 ata_dev_info(dev, "class mismatch %u != %u\n",
3959 dev->class, new_class);
3965 rc = ata_dev_reread_id(dev, readid_flags);
3969 /* configure device according to the new ID */
3970 rc = ata_dev_configure(dev);
3974 /* verify n_sectors hasn't changed */
3975 if (dev->class != ATA_DEV_ATA || !n_sectors ||
3976 dev->n_sectors == n_sectors)
3979 /* n_sectors has changed */
3980 ata_dev_warn(dev, "n_sectors mismatch %llu != %llu\n",
3981 (unsigned long long)n_sectors,
3982 (unsigned long long)dev->n_sectors);
3985 * Something could have caused HPA to be unlocked
3986 * involuntarily. If n_native_sectors hasn't changed and the
3987 * new size matches it, keep the device.
3989 if (dev->n_native_sectors == n_native_sectors &&
3990 dev->n_sectors > n_sectors && dev->n_sectors == n_native_sectors) {
3992 "new n_sectors matches native, probably "
3993 "late HPA unlock, n_sectors updated\n");
3994 /* use the larger n_sectors */
3999 * Some BIOSes boot w/o HPA but resume w/ HPA locked. Try
4000 * unlocking HPA in those cases.
4002 * https://bugzilla.kernel.org/show_bug.cgi?id=15396
4004 if (dev->n_native_sectors == n_native_sectors &&
4005 dev->n_sectors < n_sectors && n_sectors == n_native_sectors &&
4006 !(dev->horkage & ATA_HORKAGE_BROKEN_HPA)) {
4008 "old n_sectors matches native, probably "
4009 "late HPA lock, will try to unlock HPA\n");
4010 /* try unlocking HPA */
4011 dev->flags |= ATA_DFLAG_UNLOCK_HPA;
4016 /* restore original n_[native_]sectors and fail */
4017 dev->n_native_sectors = n_native_sectors;
4018 dev->n_sectors = n_sectors;
4020 ata_dev_err(dev, "revalidation failed (errno=%d)\n", rc);
4024 struct ata_blacklist_entry {
4025 const char *model_num;
4026 const char *model_rev;
4027 unsigned long horkage;
4030 static const struct ata_blacklist_entry ata_device_blacklist [] = {
4031 /* Devices with DMA related problems under Linux */
4032 { "WDC AC11000H", NULL, ATA_HORKAGE_NODMA },
4033 { "WDC AC22100H", NULL, ATA_HORKAGE_NODMA },
4034 { "WDC AC32500H", NULL, ATA_HORKAGE_NODMA },
4035 { "WDC AC33100H", NULL, ATA_HORKAGE_NODMA },
4036 { "WDC AC31600H", NULL, ATA_HORKAGE_NODMA },
4037 { "WDC AC32100H", "24.09P07", ATA_HORKAGE_NODMA },
4038 { "WDC AC23200L", "21.10N21", ATA_HORKAGE_NODMA },
4039 { "Compaq CRD-8241B", NULL, ATA_HORKAGE_NODMA },
4040 { "CRD-8400B", NULL, ATA_HORKAGE_NODMA },
4041 { "CRD-848[02]B", NULL, ATA_HORKAGE_NODMA },
4042 { "CRD-84", NULL, ATA_HORKAGE_NODMA },
4043 { "SanDisk SDP3B", NULL, ATA_HORKAGE_NODMA },
4044 { "SanDisk SDP3B-64", NULL, ATA_HORKAGE_NODMA },
4045 { "SANYO CD-ROM CRD", NULL, ATA_HORKAGE_NODMA },
4046 { "HITACHI CDR-8", NULL, ATA_HORKAGE_NODMA },
4047 { "HITACHI CDR-8[34]35",NULL, ATA_HORKAGE_NODMA },
4048 { "Toshiba CD-ROM XM-6202B", NULL, ATA_HORKAGE_NODMA },
4049 { "TOSHIBA CD-ROM XM-1702BC", NULL, ATA_HORKAGE_NODMA },
4050 { "CD-532E-A", NULL, ATA_HORKAGE_NODMA },
4051 { "E-IDE CD-ROM CR-840",NULL, ATA_HORKAGE_NODMA },
4052 { "CD-ROM Drive/F5A", NULL, ATA_HORKAGE_NODMA },
4053 { "WPI CDD-820", NULL, ATA_HORKAGE_NODMA },
4054 { "SAMSUNG CD-ROM SC-148C", NULL, ATA_HORKAGE_NODMA },
4055 { "SAMSUNG CD-ROM SC", NULL, ATA_HORKAGE_NODMA },
4056 { "ATAPI CD-ROM DRIVE 40X MAXIMUM",NULL,ATA_HORKAGE_NODMA },
4057 { "_NEC DV5800A", NULL, ATA_HORKAGE_NODMA },
4058 { "SAMSUNG CD-ROM SN-124", "N001", ATA_HORKAGE_NODMA },
4059 { "Seagate STT20000A", NULL, ATA_HORKAGE_NODMA },
4060 { "2GB ATA Flash Disk", "ADMA428M", ATA_HORKAGE_NODMA },
4061 /* Odd clown on sil3726/4726 PMPs */
4062 { "Config Disk", NULL, ATA_HORKAGE_DISABLE },
4064 /* Weird ATAPI devices */
4065 { "TORiSAN DVD-ROM DRD-N216", NULL, ATA_HORKAGE_MAX_SEC_128 },
4066 { "QUANTUM DAT DAT72-000", NULL, ATA_HORKAGE_ATAPI_MOD16_DMA },
4068 /* Devices we expect to fail diagnostics */
4070 /* Devices where NCQ should be avoided */
4072 { "WDC WD740ADFD-00", NULL, ATA_HORKAGE_NONCQ },
4073 { "WDC WD740ADFD-00NLR1", NULL, ATA_HORKAGE_NONCQ, },
4074 /* http://thread.gmane.org/gmane.linux.ide/14907 */
4075 { "FUJITSU MHT2060BH", NULL, ATA_HORKAGE_NONCQ },
4077 { "Maxtor *", "BANC*", ATA_HORKAGE_NONCQ },
4078 { "Maxtor 7V300F0", "VA111630", ATA_HORKAGE_NONCQ },
4079 { "ST380817AS", "3.42", ATA_HORKAGE_NONCQ },
4080 { "ST3160023AS", "3.42", ATA_HORKAGE_NONCQ },
4081 { "OCZ CORE_SSD", "02.10104", ATA_HORKAGE_NONCQ },
4083 /* Seagate NCQ + FLUSH CACHE firmware bug */
4084 { "ST31500341AS", "SD1[5-9]", ATA_HORKAGE_NONCQ |
4085 ATA_HORKAGE_FIRMWARE_WARN },
4087 { "ST31000333AS", "SD1[5-9]", ATA_HORKAGE_NONCQ |
4088 ATA_HORKAGE_FIRMWARE_WARN },
4090 { "ST3640[36]23AS", "SD1[5-9]", ATA_HORKAGE_NONCQ |
4091 ATA_HORKAGE_FIRMWARE_WARN },
4093 { "ST3320[68]13AS", "SD1[5-9]", ATA_HORKAGE_NONCQ |
4094 ATA_HORKAGE_FIRMWARE_WARN },
4096 /* Blacklist entries taken from Silicon Image 3124/3132
4097 Windows driver .inf file - also several Linux problem reports */
4098 { "HTS541060G9SA00", "MB3OC60D", ATA_HORKAGE_NONCQ, },
4099 { "HTS541080G9SA00", "MB4OC60D", ATA_HORKAGE_NONCQ, },
4100 { "HTS541010G9SA00", "MBZOC60D", ATA_HORKAGE_NONCQ, },
4102 /* https://bugzilla.kernel.org/show_bug.cgi?id=15573 */
4103 { "C300-CTFDDAC128MAG", "0001", ATA_HORKAGE_NONCQ, },
4105 /* devices which puke on READ_NATIVE_MAX */
4106 { "HDS724040KLSA80", "KFAOA20N", ATA_HORKAGE_BROKEN_HPA, },
4107 { "WDC WD3200JD-00KLB0", "WD-WCAMR1130137", ATA_HORKAGE_BROKEN_HPA },
4108 { "WDC WD2500JD-00HBB0", "WD-WMAL71490727", ATA_HORKAGE_BROKEN_HPA },
4109 { "MAXTOR 6L080L4", "A93.0500", ATA_HORKAGE_BROKEN_HPA },
4111 /* this one allows HPA unlocking but fails IOs on the area */
4112 { "OCZ-VERTEX", "1.30", ATA_HORKAGE_BROKEN_HPA },
4114 /* Devices which report 1 sector over size HPA */
4115 { "ST340823A", NULL, ATA_HORKAGE_HPA_SIZE, },
4116 { "ST320413A", NULL, ATA_HORKAGE_HPA_SIZE, },
4117 { "ST310211A", NULL, ATA_HORKAGE_HPA_SIZE, },
4119 /* Devices which get the IVB wrong */
4120 { "QUANTUM FIREBALLlct10 05", "A03.0900", ATA_HORKAGE_IVB, },
4121 /* Maybe we should just blacklist TSSTcorp... */
4122 { "TSSTcorp CDDVDW SH-S202[HJN]", "SB0[01]", ATA_HORKAGE_IVB, },
4124 /* Devices that do not need bridging limits applied */
4125 { "MTRON MSP-SATA*", NULL, ATA_HORKAGE_BRIDGE_OK, },
4127 /* Devices which aren't very happy with higher link speeds */
4128 { "WD My Book", NULL, ATA_HORKAGE_1_5_GBPS, },
4131 * Devices which choke on SETXFER. Applies only if both the
4132 * device and controller are SATA.
4134 { "PIONEER DVD-RW DVRTD08", NULL, ATA_HORKAGE_NOSETXFER },
4135 { "PIONEER DVD-RW DVRTD08A", NULL, ATA_HORKAGE_NOSETXFER },
4136 { "PIONEER DVD-RW DVR-215", NULL, ATA_HORKAGE_NOSETXFER },
4137 { "PIONEER DVD-RW DVR-212D", NULL, ATA_HORKAGE_NOSETXFER },
4138 { "PIONEER DVD-RW DVR-216D", NULL, ATA_HORKAGE_NOSETXFER },
4145 * glob_match - match a text string against a glob-style pattern
4146 * @text: the string to be examined
4147 * @pattern: the glob-style pattern to be matched against
4149 * Either/both of text and pattern can be empty strings.
4151 * Match text against a glob-style pattern, with wildcards and simple sets:
4153 * ? matches any single character.
4154 * * matches any run of characters.
4155 * [xyz] matches a single character from the set: x, y, or z.
4156 * [a-d] matches a single character from the range: a, b, c, or d.
4157 * [a-d0-9] matches a single character from either range.
4159 * The special characters ?, [, -, or *, can be matched using a set, eg. [*]
4160 * Behaviour with malformed patterns is undefined, though generally reasonable.
4162 * Sample patterns: "SD1?", "SD1[0-5]", "*R0", "SD*1?[012]*xx"
4164 * This function uses one level of recursion per '*' in pattern.
4165 * Since it calls _nothing_ else, and has _no_ explicit local variables,
4166 * this will not cause stack problems for any reasonable use here.
4169 * 0 on match, 1 otherwise.
4171 static int glob_match (const char *text, const char *pattern)
4174 /* Match single character or a '?' wildcard */
4175 if (*text == *pattern || *pattern == '?') {
4177 return 0; /* End of both strings: match */
4179 /* Match single char against a '[' bracketed ']' pattern set */
4180 if (!*text || *pattern != '[')
4181 break; /* Not a pattern set */
4182 while (*++pattern && *pattern != ']' && *text != *pattern) {
4183 if (*pattern == '-' && *(pattern - 1) != '[')
4184 if (*text > *(pattern - 1) && *text < *(pattern + 1)) {
4189 if (!*pattern || *pattern == ']')
4190 return 1; /* No match */
4191 while (*pattern && *pattern++ != ']');
4193 } while (*++text && *pattern);
4195 /* Match any run of chars against a '*' wildcard */
4196 if (*pattern == '*') {
4198 return 0; /* Match: avoid recursion at end of pattern */
4199 /* Loop to handle additional pattern chars after the wildcard */
4201 if (glob_match(text, pattern) == 0)
4202 return 0; /* Remainder matched */
4203 ++text; /* Absorb (match) this char and try again */
4206 if (!*text && !*pattern)
4207 return 0; /* End of both strings: match */
4208 return 1; /* No match */
4211 static unsigned long ata_dev_blacklisted(const struct ata_device *dev)
4213 unsigned char model_num[ATA_ID_PROD_LEN + 1];
4214 unsigned char model_rev[ATA_ID_FW_REV_LEN + 1];
4215 const struct ata_blacklist_entry *ad = ata_device_blacklist;
4217 ata_id_c_string(dev->id, model_num, ATA_ID_PROD, sizeof(model_num));
4218 ata_id_c_string(dev->id, model_rev, ATA_ID_FW_REV, sizeof(model_rev));
4220 while (ad->model_num) {
4221 if (!glob_match(model_num, ad->model_num)) {
4222 if (ad->model_rev == NULL)
4224 if (!glob_match(model_rev, ad->model_rev))
4232 static int ata_dma_blacklisted(const struct ata_device *dev)
4234 /* We don't support polling DMA.
4235 * DMA blacklist those ATAPI devices with CDB-intr (and use PIO)
4236 * if the LLDD handles only interrupts in the HSM_ST_LAST state.
4238 if ((dev->link->ap->flags & ATA_FLAG_PIO_POLLING) &&
4239 (dev->flags & ATA_DFLAG_CDB_INTR))
4241 return (dev->horkage & ATA_HORKAGE_NODMA) ? 1 : 0;
4245 * ata_is_40wire - check drive side detection
4248 * Perform drive side detection decoding, allowing for device vendors
4249 * who can't follow the documentation.
4252 static int ata_is_40wire(struct ata_device *dev)
4254 if (dev->horkage & ATA_HORKAGE_IVB)
4255 return ata_drive_40wire_relaxed(dev->id);
4256 return ata_drive_40wire(dev->id);
4260 * cable_is_40wire - 40/80/SATA decider
4261 * @ap: port to consider
4263 * This function encapsulates the policy for speed management
4264 * in one place. At the moment we don't cache the result but
4265 * there is a good case for setting ap->cbl to the result when
4266 * we are called with unknown cables (and figuring out if it
4267 * impacts hotplug at all).
4269 * Return 1 if the cable appears to be 40 wire.
4272 static int cable_is_40wire(struct ata_port *ap)
4274 struct ata_link *link;
4275 struct ata_device *dev;
4277 /* If the controller thinks we are 40 wire, we are. */
4278 if (ap->cbl == ATA_CBL_PATA40)
4281 /* If the controller thinks we are 80 wire, we are. */
4282 if (ap->cbl == ATA_CBL_PATA80 || ap->cbl == ATA_CBL_SATA)
4285 /* If the system is known to be 40 wire short cable (eg
4286 * laptop), then we allow 80 wire modes even if the drive
4289 if (ap->cbl == ATA_CBL_PATA40_SHORT)
4292 /* If the controller doesn't know, we scan.
4294 * Note: We look for all 40 wire detects at this point. Any
4295 * 80 wire detect is taken to be 80 wire cable because
4296 * - in many setups only the one drive (slave if present) will
4297 * give a valid detect
4298 * - if you have a non detect capable drive you don't want it
4299 * to colour the choice
4301 ata_for_each_link(link, ap, EDGE) {
4302 ata_for_each_dev(dev, link, ENABLED) {
4303 if (!ata_is_40wire(dev))
4311 * ata_dev_xfermask - Compute supported xfermask of the given device
4312 * @dev: Device to compute xfermask for
4314 * Compute supported xfermask of @dev and store it in
4315 * dev->*_mask. This function is responsible for applying all
4316 * known limits including host controller limits, device
4322 static void ata_dev_xfermask(struct ata_device *dev)
4324 struct ata_link *link = dev->link;
4325 struct ata_port *ap = link->ap;
4326 struct ata_host *host = ap->host;
4327 unsigned long xfer_mask;
4329 /* controller modes available */
4330 xfer_mask = ata_pack_xfermask(ap->pio_mask,
4331 ap->mwdma_mask, ap->udma_mask);
4333 /* drive modes available */
4334 xfer_mask &= ata_pack_xfermask(dev->pio_mask,
4335 dev->mwdma_mask, dev->udma_mask);
4336 xfer_mask &= ata_id_xfermask(dev->id);
4339 * CFA Advanced TrueIDE timings are not allowed on a shared
4342 if (ata_dev_pair(dev)) {
4343 /* No PIO5 or PIO6 */
4344 xfer_mask &= ~(0x03 << (ATA_SHIFT_PIO + 5));
4345 /* No MWDMA3 or MWDMA 4 */
4346 xfer_mask &= ~(0x03 << (ATA_SHIFT_MWDMA + 3));
4349 if (ata_dma_blacklisted(dev)) {
4350 xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA);
4352 "device is on DMA blacklist, disabling DMA\n");
4355 if ((host->flags & ATA_HOST_SIMPLEX) &&
4356 host->simplex_claimed && host->simplex_claimed != ap) {
4357 xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA);
4359 "simplex DMA is claimed by other device, disabling DMA\n");
4362 if (ap->flags & ATA_FLAG_NO_IORDY)
4363 xfer_mask &= ata_pio_mask_no_iordy(dev);
4365 if (ap->ops->mode_filter)
4366 xfer_mask = ap->ops->mode_filter(dev, xfer_mask);
4368 /* Apply cable rule here. Don't apply it early because when
4369 * we handle hot plug the cable type can itself change.
4370 * Check this last so that we know if the transfer rate was
4371 * solely limited by the cable.
4372 * Unknown or 80 wire cables reported host side are checked
4373 * drive side as well. Cases where we know a 40wire cable
4374 * is used safely for 80 are not checked here.
4376 if (xfer_mask & (0xF8 << ATA_SHIFT_UDMA))
4377 /* UDMA/44 or higher would be available */
4378 if (cable_is_40wire(ap)) {
4380 "limited to UDMA/33 due to 40-wire cable\n");
4381 xfer_mask &= ~(0xF8 << ATA_SHIFT_UDMA);
4384 ata_unpack_xfermask(xfer_mask, &dev->pio_mask,
4385 &dev->mwdma_mask, &dev->udma_mask);
4389 * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command
4390 * @dev: Device to which command will be sent
4392 * Issue SET FEATURES - XFER MODE command to device @dev
4396 * PCI/etc. bus probe sem.
4399 * 0 on success, AC_ERR_* mask otherwise.
4402 static unsigned int ata_dev_set_xfermode(struct ata_device *dev)
4404 struct ata_taskfile tf;
4405 unsigned int err_mask;
4407 /* set up set-features taskfile */
4408 DPRINTK("set features - xfer mode\n");
4410 /* Some controllers and ATAPI devices show flaky interrupt
4411 * behavior after setting xfer mode. Use polling instead.
4413 ata_tf_init(dev, &tf);
4414 tf.command = ATA_CMD_SET_FEATURES;
4415 tf.feature = SETFEATURES_XFER;
4416 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_POLLING;
4417 tf.protocol = ATA_PROT_NODATA;
4418 /* If we are using IORDY we must send the mode setting command */
4419 if (ata_pio_need_iordy(dev))
4420 tf.nsect = dev->xfer_mode;
4421 /* If the device has IORDY and the controller does not - turn it off */
4422 else if (ata_id_has_iordy(dev->id))
4424 else /* In the ancient relic department - skip all of this */
4427 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
4429 DPRINTK("EXIT, err_mask=%x\n", err_mask);
4434 * ata_dev_set_feature - Issue SET FEATURES - SATA FEATURES
4435 * @dev: Device to which command will be sent
4436 * @enable: Whether to enable or disable the feature
4437 * @feature: The sector count represents the feature to set
4439 * Issue SET FEATURES - SATA FEATURES command to device @dev
4440 * on port @ap with sector count
4443 * PCI/etc. bus probe sem.
4446 * 0 on success, AC_ERR_* mask otherwise.
4448 unsigned int ata_dev_set_feature(struct ata_device *dev, u8 enable, u8 feature)
4450 struct ata_taskfile tf;
4451 unsigned int err_mask;
4453 /* set up set-features taskfile */
4454 DPRINTK("set features - SATA features\n");
4456 ata_tf_init(dev, &tf);
4457 tf.command = ATA_CMD_SET_FEATURES;
4458 tf.feature = enable;
4459 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
4460 tf.protocol = ATA_PROT_NODATA;
4463 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
4465 DPRINTK("EXIT, err_mask=%x\n", err_mask);
4470 * ata_dev_init_params - Issue INIT DEV PARAMS command
4471 * @dev: Device to which command will be sent
4472 * @heads: Number of heads (taskfile parameter)
4473 * @sectors: Number of sectors (taskfile parameter)
4476 * Kernel thread context (may sleep)
4479 * 0 on success, AC_ERR_* mask otherwise.
4481 static unsigned int ata_dev_init_params(struct ata_device *dev,
4482 u16 heads, u16 sectors)
4484 struct ata_taskfile tf;
4485 unsigned int err_mask;
4487 /* Number of sectors per track 1-255. Number of heads 1-16 */
4488 if (sectors < 1 || sectors > 255 || heads < 1 || heads > 16)
4489 return AC_ERR_INVALID;
4491 /* set up init dev params taskfile */
4492 DPRINTK("init dev params \n");
4494 ata_tf_init(dev, &tf);
4495 tf.command = ATA_CMD_INIT_DEV_PARAMS;
4496 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
4497 tf.protocol = ATA_PROT_NODATA;
4499 tf.device |= (heads - 1) & 0x0f; /* max head = num. of heads - 1 */
4501 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
4502 /* A clean abort indicates an original or just out of spec drive
4503 and we should continue as we issue the setup based on the
4504 drive reported working geometry */
4505 if (err_mask == AC_ERR_DEV && (tf.feature & ATA_ABORTED))
4508 DPRINTK("EXIT, err_mask=%x\n", err_mask);
4513 * ata_sg_clean - Unmap DMA memory associated with command
4514 * @qc: Command containing DMA memory to be released
4516 * Unmap all mapped DMA memory associated with this command.
4519 * spin_lock_irqsave(host lock)
4521 void ata_sg_clean(struct ata_queued_cmd *qc)
4523 struct ata_port *ap = qc->ap;
4524 struct scatterlist *sg = qc->sg;
4525 int dir = qc->dma_dir;
4527 WARN_ON_ONCE(sg == NULL);
4529 VPRINTK("unmapping %u sg elements\n", qc->n_elem);
4532 dma_unmap_sg(ap->dev, sg, qc->orig_n_elem, dir);
4534 qc->flags &= ~ATA_QCFLAG_DMAMAP;
4539 * atapi_check_dma - Check whether ATAPI DMA can be supported
4540 * @qc: Metadata associated with taskfile to check
4542 * Allow low-level driver to filter ATA PACKET commands, returning
4543 * a status indicating whether or not it is OK to use DMA for the
4544 * supplied PACKET command.
4547 * spin_lock_irqsave(host lock)
4549 * RETURNS: 0 when ATAPI DMA can be used
4552 int atapi_check_dma(struct ata_queued_cmd *qc)
4554 struct ata_port *ap = qc->ap;
4556 /* Don't allow DMA if it isn't multiple of 16 bytes. Quite a
4557 * few ATAPI devices choke on such DMA requests.
4559 if (!(qc->dev->horkage & ATA_HORKAGE_ATAPI_MOD16_DMA) &&
4560 unlikely(qc->nbytes & 15))
4563 if (ap->ops->check_atapi_dma)
4564 return ap->ops->check_atapi_dma(qc);
4570 * ata_std_qc_defer - Check whether a qc needs to be deferred
4571 * @qc: ATA command in question
4573 * Non-NCQ commands cannot run with any other command, NCQ or
4574 * not. As upper layer only knows the queue depth, we are
4575 * responsible for maintaining exclusion. This function checks
4576 * whether a new command @qc can be issued.
4579 * spin_lock_irqsave(host lock)
4582 * ATA_DEFER_* if deferring is needed, 0 otherwise.
4584 int ata_std_qc_defer(struct ata_queued_cmd *qc)
4586 struct ata_link *link = qc->dev->link;
4588 if (qc->tf.protocol == ATA_PROT_NCQ) {
4589 if (!ata_tag_valid(link->active_tag))
4592 if (!ata_tag_valid(link->active_tag) && !link->sactive)
4596 return ATA_DEFER_LINK;
4599 void ata_noop_qc_prep(struct ata_queued_cmd *qc) { }
4602 * ata_sg_init - Associate command with scatter-gather table.
4603 * @qc: Command to be associated
4604 * @sg: Scatter-gather table.
4605 * @n_elem: Number of elements in s/g table.
4607 * Initialize the data-related elements of queued_cmd @qc
4608 * to point to a scatter-gather table @sg, containing @n_elem
4612 * spin_lock_irqsave(host lock)
4614 void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
4615 unsigned int n_elem)
4618 qc->n_elem = n_elem;
4623 * ata_sg_setup - DMA-map the scatter-gather table associated with a command.
4624 * @qc: Command with scatter-gather table to be mapped.
4626 * DMA-map the scatter-gather table associated with queued_cmd @qc.
4629 * spin_lock_irqsave(host lock)
4632 * Zero on success, negative on error.
4635 static int ata_sg_setup(struct ata_queued_cmd *qc)
4637 struct ata_port *ap = qc->ap;
4638 unsigned int n_elem;
4640 VPRINTK("ENTER, ata%u\n", ap->print_id);
4642 n_elem = dma_map_sg(ap->dev, qc->sg, qc->n_elem, qc->dma_dir);
4646 DPRINTK("%d sg elements mapped\n", n_elem);
4647 qc->orig_n_elem = qc->n_elem;
4648 qc->n_elem = n_elem;
4649 qc->flags |= ATA_QCFLAG_DMAMAP;
4655 * swap_buf_le16 - swap halves of 16-bit words in place
4656 * @buf: Buffer to swap
4657 * @buf_words: Number of 16-bit words in buffer.
4659 * Swap halves of 16-bit words if needed to convert from
4660 * little-endian byte order to native cpu byte order, or
4664 * Inherited from caller.
4666 void swap_buf_le16(u16 *buf, unsigned int buf_words)
4671 for (i = 0; i < buf_words; i++)
4672 buf[i] = le16_to_cpu(buf[i]);
4673 #endif /* __BIG_ENDIAN */
4677 * ata_qc_new - Request an available ATA command, for queueing
4684 static struct ata_queued_cmd *ata_qc_new(struct ata_port *ap)
4686 struct ata_queued_cmd *qc = NULL;
4689 /* no command while frozen */
4690 if (unlikely(ap->pflags & ATA_PFLAG_FROZEN))
4693 /* the last tag is reserved for internal command. */
4694 for (i = 0; i < ATA_MAX_QUEUE - 1; i++)
4695 if (!test_and_set_bit(i, &ap->qc_allocated)) {
4696 qc = __ata_qc_from_tag(ap, i);
4707 * ata_qc_new_init - Request an available ATA command, and initialize it
4708 * @dev: Device from whom we request an available command structure
4714 struct ata_queued_cmd *ata_qc_new_init(struct ata_device *dev)
4716 struct ata_port *ap = dev->link->ap;
4717 struct ata_queued_cmd *qc;
4719 qc = ata_qc_new(ap);
4732 * ata_qc_free - free unused ata_queued_cmd
4733 * @qc: Command to complete
4735 * Designed to free unused ata_queued_cmd object
4736 * in case something prevents using it.
4739 * spin_lock_irqsave(host lock)
4741 void ata_qc_free(struct ata_queued_cmd *qc)
4743 struct ata_port *ap;
4746 WARN_ON_ONCE(qc == NULL); /* ata_qc_from_tag _might_ return NULL */
4751 if (likely(ata_tag_valid(tag))) {
4752 qc->tag = ATA_TAG_POISON;
4753 clear_bit(tag, &ap->qc_allocated);
4757 void __ata_qc_complete(struct ata_queued_cmd *qc)
4759 struct ata_port *ap;
4760 struct ata_link *link;
4762 WARN_ON_ONCE(qc == NULL); /* ata_qc_from_tag _might_ return NULL */
4763 WARN_ON_ONCE(!(qc->flags & ATA_QCFLAG_ACTIVE));
4765 link = qc->dev->link;
4767 if (likely(qc->flags & ATA_QCFLAG_DMAMAP))
4770 /* command should be marked inactive atomically with qc completion */
4771 if (qc->tf.protocol == ATA_PROT_NCQ) {
4772 link->sactive &= ~(1 << qc->tag);
4774 ap->nr_active_links--;
4776 link->active_tag = ATA_TAG_POISON;
4777 ap->nr_active_links--;
4780 /* clear exclusive status */
4781 if (unlikely(qc->flags & ATA_QCFLAG_CLEAR_EXCL &&
4782 ap->excl_link == link))
4783 ap->excl_link = NULL;
4785 /* atapi: mark qc as inactive to prevent the interrupt handler
4786 * from completing the command twice later, before the error handler
4787 * is called. (when rc != 0 and atapi request sense is needed)
4789 qc->flags &= ~ATA_QCFLAG_ACTIVE;
4790 ap->qc_active &= ~(1 << qc->tag);
4792 /* call completion callback */
4793 qc->complete_fn(qc);
4796 static void fill_result_tf(struct ata_queued_cmd *qc)
4798 struct ata_port *ap = qc->ap;
4800 qc->result_tf.flags = qc->tf.flags;
4801 ap->ops->qc_fill_rtf(qc);
4804 static void ata_verify_xfer(struct ata_queued_cmd *qc)
4806 struct ata_device *dev = qc->dev;
4808 if (ata_is_nodata(qc->tf.protocol))
4811 if ((dev->mwdma_mask || dev->udma_mask) && ata_is_pio(qc->tf.protocol))
4814 dev->flags &= ~ATA_DFLAG_DUBIOUS_XFER;
4818 * ata_qc_complete - Complete an active ATA command
4819 * @qc: Command to complete
4821 * Indicate to the mid and upper layers that an ATA command has
4822 * completed, with either an ok or not-ok status.
4824 * Refrain from calling this function multiple times when
4825 * successfully completing multiple NCQ commands.
4826 * ata_qc_complete_multiple() should be used instead, which will
4827 * properly update IRQ expect state.
4830 * spin_lock_irqsave(host lock)
4832 void ata_qc_complete(struct ata_queued_cmd *qc)
4834 struct ata_port *ap = qc->ap;
4836 /* XXX: New EH and old EH use different mechanisms to
4837 * synchronize EH with regular execution path.
4839 * In new EH, a failed qc is marked with ATA_QCFLAG_FAILED.
4840 * Normal execution path is responsible for not accessing a
4841 * failed qc. libata core enforces the rule by returning NULL
4842 * from ata_qc_from_tag() for failed qcs.
4844 * Old EH depends on ata_qc_complete() nullifying completion
4845 * requests if ATA_QCFLAG_EH_SCHEDULED is set. Old EH does
4846 * not synchronize with interrupt handler. Only PIO task is
4849 if (ap->ops->error_handler) {
4850 struct ata_device *dev = qc->dev;
4851 struct ata_eh_info *ehi = &dev->link->eh_info;
4853 if (unlikely(qc->err_mask))
4854 qc->flags |= ATA_QCFLAG_FAILED;
4857 * Finish internal commands without any further processing
4858 * and always with the result TF filled.
4860 if (unlikely(ata_tag_internal(qc->tag))) {
4862 __ata_qc_complete(qc);
4867 * Non-internal qc has failed. Fill the result TF and
4870 if (unlikely(qc->flags & ATA_QCFLAG_FAILED)) {
4872 ata_qc_schedule_eh(qc);
4876 WARN_ON_ONCE(ap->pflags & ATA_PFLAG_FROZEN);
4878 /* read result TF if requested */
4879 if (qc->flags & ATA_QCFLAG_RESULT_TF)
4882 /* Some commands need post-processing after successful
4885 switch (qc->tf.command) {
4886 case ATA_CMD_SET_FEATURES:
4887 if (qc->tf.feature != SETFEATURES_WC_ON &&
4888 qc->tf.feature != SETFEATURES_WC_OFF)
4891 case ATA_CMD_INIT_DEV_PARAMS: /* CHS translation changed */
4892 case ATA_CMD_SET_MULTI: /* multi_count changed */
4893 /* revalidate device */
4894 ehi->dev_action[dev->devno] |= ATA_EH_REVALIDATE;
4895 ata_port_schedule_eh(ap);
4899 dev->flags |= ATA_DFLAG_SLEEPING;
4903 if (unlikely(dev->flags & ATA_DFLAG_DUBIOUS_XFER))
4904 ata_verify_xfer(qc);
4906 __ata_qc_complete(qc);
4908 if (qc->flags & ATA_QCFLAG_EH_SCHEDULED)
4911 /* read result TF if failed or requested */
4912 if (qc->err_mask || qc->flags & ATA_QCFLAG_RESULT_TF)
4915 __ata_qc_complete(qc);
4920 * ata_qc_complete_multiple - Complete multiple qcs successfully
4921 * @ap: port in question
4922 * @qc_active: new qc_active mask
4924 * Complete in-flight commands. This functions is meant to be
4925 * called from low-level driver's interrupt routine to complete
4926 * requests normally. ap->qc_active and @qc_active is compared
4927 * and commands are completed accordingly.
4929 * Always use this function when completing multiple NCQ commands
4930 * from IRQ handlers instead of calling ata_qc_complete()
4931 * multiple times to keep IRQ expect status properly in sync.
4934 * spin_lock_irqsave(host lock)
4937 * Number of completed commands on success, -errno otherwise.
4939 int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active)
4944 done_mask = ap->qc_active ^ qc_active;
4946 if (unlikely(done_mask & qc_active)) {
4947 ata_port_err(ap, "illegal qc_active transition (%08x->%08x)\n",
4948 ap->qc_active, qc_active);
4953 struct ata_queued_cmd *qc;
4954 unsigned int tag = __ffs(done_mask);
4956 qc = ata_qc_from_tag(ap, tag);
4958 ata_qc_complete(qc);
4961 done_mask &= ~(1 << tag);
4968 * ata_qc_issue - issue taskfile to device
4969 * @qc: command to issue to device
4971 * Prepare an ATA command to submission to device.
4972 * This includes mapping the data into a DMA-able
4973 * area, filling in the S/G table, and finally
4974 * writing the taskfile to hardware, starting the command.
4977 * spin_lock_irqsave(host lock)
4979 void ata_qc_issue(struct ata_queued_cmd *qc)
4981 struct ata_port *ap = qc->ap;
4982 struct ata_link *link = qc->dev->link;
4983 u8 prot = qc->tf.protocol;
4985 /* Make sure only one non-NCQ command is outstanding. The
4986 * check is skipped for old EH because it reuses active qc to
4987 * request ATAPI sense.
4989 WARN_ON_ONCE(ap->ops->error_handler && ata_tag_valid(link->active_tag));
4991 if (ata_is_ncq(prot)) {
4992 WARN_ON_ONCE(link->sactive & (1 << qc->tag));
4995 ap->nr_active_links++;
4996 link->sactive |= 1 << qc->tag;
4998 WARN_ON_ONCE(link->sactive);
5000 ap->nr_active_links++;
5001 link->active_tag = qc->tag;
5004 qc->flags |= ATA_QCFLAG_ACTIVE;
5005 ap->qc_active |= 1 << qc->tag;
5008 * We guarantee to LLDs that they will have at least one
5009 * non-zero sg if the command is a data command.
5011 if (WARN_ON_ONCE(ata_is_data(prot) &&
5012 (!qc->sg || !qc->n_elem || !qc->nbytes)))
5015 if (ata_is_dma(prot) || (ata_is_pio(prot) &&
5016 (ap->flags & ATA_FLAG_PIO_DMA)))
5017 if (ata_sg_setup(qc))
5020 /* if device is sleeping, schedule reset and abort the link */
5021 if (unlikely(qc->dev->flags & ATA_DFLAG_SLEEPING)) {
5022 link->eh_info.action |= ATA_EH_RESET;
5023 ata_ehi_push_desc(&link->eh_info, "waking up from sleep");
5024 ata_link_abort(link);
5028 ap->ops->qc_prep(qc);
5030 qc->err_mask |= ap->ops->qc_issue(qc);
5031 if (unlikely(qc->err_mask))
5036 qc->err_mask |= AC_ERR_SYSTEM;
5038 ata_qc_complete(qc);
5042 * sata_scr_valid - test whether SCRs are accessible
5043 * @link: ATA link to test SCR accessibility for
5045 * Test whether SCRs are accessible for @link.
5051 * 1 if SCRs are accessible, 0 otherwise.
5053 int sata_scr_valid(struct ata_link *link)
5055 struct ata_port *ap = link->ap;
5057 return (ap->flags & ATA_FLAG_SATA) && ap->ops->scr_read;
5061 * sata_scr_read - read SCR register of the specified port
5062 * @link: ATA link to read SCR for
5064 * @val: Place to store read value
5066 * Read SCR register @reg of @link into *@val. This function is
5067 * guaranteed to succeed if @link is ap->link, the cable type of
5068 * the port is SATA and the port implements ->scr_read.
5071 * None if @link is ap->link. Kernel thread context otherwise.
5074 * 0 on success, negative errno on failure.
5076 int sata_scr_read(struct ata_link *link, int reg, u32 *val)
5078 if (ata_is_host_link(link)) {
5079 if (sata_scr_valid(link))
5080 return link->ap->ops->scr_read(link, reg, val);
5084 return sata_pmp_scr_read(link, reg, val);
5088 * sata_scr_write - write SCR register of the specified port
5089 * @link: ATA link to write SCR for
5090 * @reg: SCR to write
5091 * @val: value to write
5093 * Write @val to SCR register @reg of @link. This function is
5094 * guaranteed to succeed if @link is ap->link, the cable type of
5095 * the port is SATA and the port implements ->scr_read.
5098 * None if @link is ap->link. Kernel thread context otherwise.
5101 * 0 on success, negative errno on failure.
5103 int sata_scr_write(struct ata_link *link, int reg, u32 val)
5105 if (ata_is_host_link(link)) {
5106 if (sata_scr_valid(link))
5107 return link->ap->ops->scr_write(link, reg, val);
5111 return sata_pmp_scr_write(link, reg, val);
5115 * sata_scr_write_flush - write SCR register of the specified port and flush
5116 * @link: ATA link to write SCR for
5117 * @reg: SCR to write
5118 * @val: value to write
5120 * This function is identical to sata_scr_write() except that this
5121 * function performs flush after writing to the register.
5124 * None if @link is ap->link. Kernel thread context otherwise.
5127 * 0 on success, negative errno on failure.
5129 int sata_scr_write_flush(struct ata_link *link, int reg, u32 val)
5131 if (ata_is_host_link(link)) {
5134 if (sata_scr_valid(link)) {
5135 rc = link->ap->ops->scr_write(link, reg, val);
5137 rc = link->ap->ops->scr_read(link, reg, &val);
5143 return sata_pmp_scr_write(link, reg, val);
5147 * ata_phys_link_online - test whether the given link is online
5148 * @link: ATA link to test
5150 * Test whether @link is online. Note that this function returns
5151 * 0 if online status of @link cannot be obtained, so
5152 * ata_link_online(link) != !ata_link_offline(link).
5158 * True if the port online status is available and online.
5160 bool ata_phys_link_online(struct ata_link *link)
5164 if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0 &&
5165 ata_sstatus_online(sstatus))
5171 * ata_phys_link_offline - test whether the given link is offline
5172 * @link: ATA link to test
5174 * Test whether @link is offline. Note that this function
5175 * returns 0 if offline status of @link cannot be obtained, so
5176 * ata_link_online(link) != !ata_link_offline(link).
5182 * True if the port offline status is available and offline.
5184 bool ata_phys_link_offline(struct ata_link *link)
5188 if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0 &&
5189 !ata_sstatus_online(sstatus))
5195 * ata_link_online - test whether the given link is online
5196 * @link: ATA link to test
5198 * Test whether @link is online. This is identical to
5199 * ata_phys_link_online() when there's no slave link. When
5200 * there's a slave link, this function should only be called on
5201 * the master link and will return true if any of M/S links is
5208 * True if the port online status is available and online.
5210 bool ata_link_online(struct ata_link *link)
5212 struct ata_link *slave = link->ap->slave_link;
5214 WARN_ON(link == slave); /* shouldn't be called on slave link */
5216 return ata_phys_link_online(link) ||
5217 (slave && ata_phys_link_online(slave));
5221 * ata_link_offline - test whether the given link is offline
5222 * @link: ATA link to test
5224 * Test whether @link is offline. This is identical to
5225 * ata_phys_link_offline() when there's no slave link. When
5226 * there's a slave link, this function should only be called on
5227 * the master link and will return true if both M/S links are
5234 * True if the port offline status is available and offline.
5236 bool ata_link_offline(struct ata_link *link)
5238 struct ata_link *slave = link->ap->slave_link;
5240 WARN_ON(link == slave); /* shouldn't be called on slave link */
5242 return ata_phys_link_offline(link) &&
5243 (!slave || ata_phys_link_offline(slave));
5247 static int ata_port_request_pm(struct ata_port *ap, pm_message_t mesg,
5248 unsigned int action, unsigned int ehi_flags,
5251 struct ata_link *link;
5252 unsigned long flags;
5255 /* Previous resume operation might still be in
5256 * progress. Wait for PM_PENDING to clear.
5258 if (ap->pflags & ATA_PFLAG_PM_PENDING) {
5259 ata_port_wait_eh(ap);
5260 WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING);
5263 /* request PM ops to EH */
5264 spin_lock_irqsave(ap->lock, flags);
5269 ap->pm_result = &rc;
5272 ap->pflags |= ATA_PFLAG_PM_PENDING;
5273 ata_for_each_link(link, ap, HOST_FIRST) {
5274 link->eh_info.action |= action;
5275 link->eh_info.flags |= ehi_flags;
5278 ata_port_schedule_eh(ap);
5280 spin_unlock_irqrestore(ap->lock, flags);
5282 /* wait and check result */
5284 ata_port_wait_eh(ap);
5285 WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING);
5291 #define to_ata_port(d) container_of(d, struct ata_port, tdev)
5293 static int ata_port_suspend_common(struct device *dev, pm_message_t mesg)
5295 struct ata_port *ap = to_ata_port(dev);
5296 unsigned int ehi_flags = ATA_EHI_QUIET;
5300 * On some hardware, device fails to respond after spun down
5301 * for suspend. As the device won't be used before being
5302 * resumed, we don't need to touch the device. Ask EH to skip
5303 * the usual stuff and proceed directly to suspend.
5305 * http://thread.gmane.org/gmane.linux.ide/46764
5307 if (mesg.event == PM_EVENT_SUSPEND)
5308 ehi_flags |= ATA_EHI_NO_AUTOPSY | ATA_EHI_NO_RECOVERY;
5310 rc = ata_port_request_pm(ap, mesg, 0, ehi_flags, 1);
5314 static int ata_port_suspend(struct device *dev)
5316 if (pm_runtime_suspended(dev))
5319 return ata_port_suspend_common(dev, PMSG_SUSPEND);
5322 static int ata_port_do_freeze(struct device *dev)
5324 if (pm_runtime_suspended(dev))
5325 pm_runtime_resume(dev);
5327 return ata_port_suspend_common(dev, PMSG_FREEZE);
5330 static int ata_port_poweroff(struct device *dev)
5332 if (pm_runtime_suspended(dev))
5335 return ata_port_suspend_common(dev, PMSG_HIBERNATE);
5338 static int ata_port_resume_common(struct device *dev)
5340 struct ata_port *ap = to_ata_port(dev);
5343 rc = ata_port_request_pm(ap, PMSG_ON, ATA_EH_RESET,
5344 ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET, 1);
5348 static int ata_port_resume(struct device *dev)
5352 rc = ata_port_resume_common(dev);
5354 pm_runtime_disable(dev);
5355 pm_runtime_set_active(dev);
5356 pm_runtime_enable(dev);
5362 static int ata_port_runtime_idle(struct device *dev)
5364 return pm_runtime_suspend(dev);
5367 static const struct dev_pm_ops ata_port_pm_ops = {
5368 .suspend = ata_port_suspend,
5369 .resume = ata_port_resume,
5370 .freeze = ata_port_do_freeze,
5371 .thaw = ata_port_resume,
5372 .poweroff = ata_port_poweroff,
5373 .restore = ata_port_resume,
5375 .runtime_suspend = ata_port_suspend,
5376 .runtime_resume = ata_port_resume_common,
5377 .runtime_idle = ata_port_runtime_idle,
5381 * ata_host_suspend - suspend host
5382 * @host: host to suspend
5385 * Suspend @host. Actual operation is performed by port suspend.
5387 int ata_host_suspend(struct ata_host *host, pm_message_t mesg)
5389 host->dev->power.power_state = mesg;
5394 * ata_host_resume - resume host
5395 * @host: host to resume
5397 * Resume @host. Actual operation is performed by port resume.
5399 void ata_host_resume(struct ata_host *host)
5401 host->dev->power.power_state = PMSG_ON;
5405 struct device_type ata_port_type = {
5408 .pm = &ata_port_pm_ops,
5413 * ata_dev_init - Initialize an ata_device structure
5414 * @dev: Device structure to initialize
5416 * Initialize @dev in preparation for probing.
5419 * Inherited from caller.
5421 void ata_dev_init(struct ata_device *dev)
5423 struct ata_link *link = ata_dev_phys_link(dev);
5424 struct ata_port *ap = link->ap;
5425 unsigned long flags;
5427 /* SATA spd limit is bound to the attached device, reset together */
5428 link->sata_spd_limit = link->hw_sata_spd_limit;
5431 /* High bits of dev->flags are used to record warm plug
5432 * requests which occur asynchronously. Synchronize using
5435 spin_lock_irqsave(ap->lock, flags);
5436 dev->flags &= ~ATA_DFLAG_INIT_MASK;
5438 spin_unlock_irqrestore(ap->lock, flags);
5440 memset((void *)dev + ATA_DEVICE_CLEAR_BEGIN, 0,
5441 ATA_DEVICE_CLEAR_END - ATA_DEVICE_CLEAR_BEGIN);
5442 dev->pio_mask = UINT_MAX;
5443 dev->mwdma_mask = UINT_MAX;
5444 dev->udma_mask = UINT_MAX;
5448 * ata_link_init - Initialize an ata_link structure
5449 * @ap: ATA port link is attached to
5450 * @link: Link structure to initialize
5451 * @pmp: Port multiplier port number
5456 * Kernel thread context (may sleep)
5458 void ata_link_init(struct ata_port *ap, struct ata_link *link, int pmp)
5462 /* clear everything except for devices */
5463 memset((void *)link + ATA_LINK_CLEAR_BEGIN, 0,
5464 ATA_LINK_CLEAR_END - ATA_LINK_CLEAR_BEGIN);
5468 link->active_tag = ATA_TAG_POISON;
5469 link->hw_sata_spd_limit = UINT_MAX;
5471 /* can't use iterator, ap isn't initialized yet */
5472 for (i = 0; i < ATA_MAX_DEVICES; i++) {
5473 struct ata_device *dev = &link->device[i];
5476 dev->devno = dev - link->device;
5477 #ifdef CONFIG_ATA_ACPI
5478 dev->gtf_filter = ata_acpi_gtf_filter;
5485 * sata_link_init_spd - Initialize link->sata_spd_limit
5486 * @link: Link to configure sata_spd_limit for
5488 * Initialize @link->[hw_]sata_spd_limit to the currently
5492 * Kernel thread context (may sleep).
5495 * 0 on success, -errno on failure.
5497 int sata_link_init_spd(struct ata_link *link)
5502 rc = sata_scr_read(link, SCR_CONTROL, &link->saved_scontrol);
5506 spd = (link->saved_scontrol >> 4) & 0xf;
5508 link->hw_sata_spd_limit &= (1 << spd) - 1;
5510 ata_force_link_limits(link);
5512 link->sata_spd_limit = link->hw_sata_spd_limit;
5518 * ata_port_alloc - allocate and initialize basic ATA port resources
5519 * @host: ATA host this allocated port belongs to
5521 * Allocate and initialize basic ATA port resources.
5524 * Allocate ATA port on success, NULL on failure.
5527 * Inherited from calling layer (may sleep).
5529 struct ata_port *ata_port_alloc(struct ata_host *host)
5531 struct ata_port *ap;
5535 ap = kzalloc(sizeof(*ap), GFP_KERNEL);
5539 ap->pflags |= ATA_PFLAG_INITIALIZING | ATA_PFLAG_FROZEN;
5540 ap->lock = &host->lock;
5543 ap->dev = host->dev;
5545 #if defined(ATA_VERBOSE_DEBUG)
5546 /* turn on all debugging levels */
5547 ap->msg_enable = 0x00FF;
5548 #elif defined(ATA_DEBUG)
5549 ap->msg_enable = ATA_MSG_DRV | ATA_MSG_INFO | ATA_MSG_CTL | ATA_MSG_WARN | ATA_MSG_ERR;
5551 ap->msg_enable = ATA_MSG_DRV | ATA_MSG_ERR | ATA_MSG_WARN;
5554 mutex_init(&ap->scsi_scan_mutex);
5555 INIT_DELAYED_WORK(&ap->hotplug_task, ata_scsi_hotplug);
5556 INIT_WORK(&ap->scsi_rescan_task, ata_scsi_dev_rescan);
5557 INIT_LIST_HEAD(&ap->eh_done_q);
5558 init_waitqueue_head(&ap->eh_wait_q);
5559 init_completion(&ap->park_req_pending);
5560 init_timer_deferrable(&ap->fastdrain_timer);
5561 ap->fastdrain_timer.function = ata_eh_fastdrain_timerfn;
5562 ap->fastdrain_timer.data = (unsigned long)ap;
5564 ap->cbl = ATA_CBL_NONE;
5566 ata_link_init(ap, &ap->link, 0);
5569 ap->stats.unhandled_irq = 1;
5570 ap->stats.idle_irq = 1;
5572 ata_sff_port_init(ap);
5577 static void ata_host_release(struct device *gendev, void *res)
5579 struct ata_host *host = dev_get_drvdata(gendev);
5582 for (i = 0; i < host->n_ports; i++) {
5583 struct ata_port *ap = host->ports[i];
5589 scsi_host_put(ap->scsi_host);
5591 kfree(ap->pmp_link);
5592 kfree(ap->slave_link);
5594 host->ports[i] = NULL;
5597 dev_set_drvdata(gendev, NULL);
5601 * ata_host_alloc - allocate and init basic ATA host resources
5602 * @dev: generic device this host is associated with
5603 * @max_ports: maximum number of ATA ports associated with this host
5605 * Allocate and initialize basic ATA host resources. LLD calls
5606 * this function to allocate a host, initializes it fully and
5607 * attaches it using ata_host_register().
5609 * @max_ports ports are allocated and host->n_ports is
5610 * initialized to @max_ports. The caller is allowed to decrease
5611 * host->n_ports before calling ata_host_register(). The unused
5612 * ports will be automatically freed on registration.
5615 * Allocate ATA host on success, NULL on failure.
5618 * Inherited from calling layer (may sleep).
5620 struct ata_host *ata_host_alloc(struct device *dev, int max_ports)
5622 struct ata_host *host;
5628 if (!devres_open_group(dev, NULL, GFP_KERNEL))
5631 /* alloc a container for our list of ATA ports (buses) */
5632 sz = sizeof(struct ata_host) + (max_ports + 1) * sizeof(void *);
5633 /* alloc a container for our list of ATA ports (buses) */
5634 host = devres_alloc(ata_host_release, sz, GFP_KERNEL);
5638 devres_add(dev, host);
5639 dev_set_drvdata(dev, host);
5641 spin_lock_init(&host->lock);
5642 mutex_init(&host->eh_mutex);
5644 host->n_ports = max_ports;
5646 /* allocate ports bound to this host */
5647 for (i = 0; i < max_ports; i++) {
5648 struct ata_port *ap;
5650 ap = ata_port_alloc(host);
5655 host->ports[i] = ap;
5658 devres_remove_group(dev, NULL);
5662 devres_release_group(dev, NULL);
5667 * ata_host_alloc_pinfo - alloc host and init with port_info array
5668 * @dev: generic device this host is associated with
5669 * @ppi: array of ATA port_info to initialize host with
5670 * @n_ports: number of ATA ports attached to this host
5672 * Allocate ATA host and initialize with info from @ppi. If NULL
5673 * terminated, @ppi may contain fewer entries than @n_ports. The
5674 * last entry will be used for the remaining ports.
5677 * Allocate ATA host on success, NULL on failure.
5680 * Inherited from calling layer (may sleep).
5682 struct ata_host *ata_host_alloc_pinfo(struct device *dev,
5683 const struct ata_port_info * const * ppi,
5686 const struct ata_port_info *pi;
5687 struct ata_host *host;
5690 host = ata_host_alloc(dev, n_ports);
5694 for (i = 0, j = 0, pi = NULL; i < host->n_ports; i++) {
5695 struct ata_port *ap = host->ports[i];
5700 ap->pio_mask = pi->pio_mask;
5701 ap->mwdma_mask = pi->mwdma_mask;
5702 ap->udma_mask = pi->udma_mask;
5703 ap->flags |= pi->flags;
5704 ap->link.flags |= pi->link_flags;
5705 ap->ops = pi->port_ops;
5707 if (!host->ops && (pi->port_ops != &ata_dummy_port_ops))
5708 host->ops = pi->port_ops;
5715 * ata_slave_link_init - initialize slave link
5716 * @ap: port to initialize slave link for
5718 * Create and initialize slave link for @ap. This enables slave
5719 * link handling on the port.
5721 * In libata, a port contains links and a link contains devices.
5722 * There is single host link but if a PMP is attached to it,
5723 * there can be multiple fan-out links. On SATA, there's usually
5724 * a single device connected to a link but PATA and SATA
5725 * controllers emulating TF based interface can have two - master
5728 * However, there are a few controllers which don't fit into this
5729 * abstraction too well - SATA controllers which emulate TF
5730 * interface with both master and slave devices but also have
5731 * separate SCR register sets for each device. These controllers
5732 * need separate links for physical link handling
5733 * (e.g. onlineness, link speed) but should be treated like a
5734 * traditional M/S controller for everything else (e.g. command
5735 * issue, softreset).
5737 * slave_link is libata's way of handling this class of
5738 * controllers without impacting core layer too much. For
5739 * anything other than physical link handling, the default host
5740 * link is used for both master and slave. For physical link
5741 * handling, separate @ap->slave_link is used. All dirty details
5742 * are implemented inside libata core layer. From LLD's POV, the
5743 * only difference is that prereset, hardreset and postreset are
5744 * called once more for the slave link, so the reset sequence
5745 * looks like the following.
5747 * prereset(M) -> prereset(S) -> hardreset(M) -> hardreset(S) ->
5748 * softreset(M) -> postreset(M) -> postreset(S)
5750 * Note that softreset is called only for the master. Softreset
5751 * resets both M/S by definition, so SRST on master should handle
5752 * both (the standard method will work just fine).
5755 * Should be called before host is registered.
5758 * 0 on success, -errno on failure.
5760 int ata_slave_link_init(struct ata_port *ap)
5762 struct ata_link *link;
5764 WARN_ON(ap->slave_link);
5765 WARN_ON(ap->flags & ATA_FLAG_PMP);
5767 link = kzalloc(sizeof(*link), GFP_KERNEL);
5771 ata_link_init(ap, link, 1);
5772 ap->slave_link = link;
5776 static void ata_host_stop(struct device *gendev, void *res)
5778 struct ata_host *host = dev_get_drvdata(gendev);
5781 WARN_ON(!(host->flags & ATA_HOST_STARTED));
5783 for (i = 0; i < host->n_ports; i++) {
5784 struct ata_port *ap = host->ports[i];
5786 if (ap->ops->port_stop)
5787 ap->ops->port_stop(ap);
5790 if (host->ops->host_stop)
5791 host->ops->host_stop(host);
5795 * ata_finalize_port_ops - finalize ata_port_operations
5796 * @ops: ata_port_operations to finalize
5798 * An ata_port_operations can inherit from another ops and that
5799 * ops can again inherit from another. This can go on as many
5800 * times as necessary as long as there is no loop in the
5801 * inheritance chain.
5803 * Ops tables are finalized when the host is started. NULL or
5804 * unspecified entries are inherited from the closet ancestor
5805 * which has the method and the entry is populated with it.
5806 * After finalization, the ops table directly points to all the
5807 * methods and ->inherits is no longer necessary and cleared.
5809 * Using ATA_OP_NULL, inheriting ops can force a method to NULL.
5814 static void ata_finalize_port_ops(struct ata_port_operations *ops)
5816 static DEFINE_SPINLOCK(lock);
5817 const struct ata_port_operations *cur;
5818 void **begin = (void **)ops;
5819 void **end = (void **)&ops->inherits;
5822 if (!ops || !ops->inherits)
5827 for (cur = ops->inherits; cur; cur = cur->inherits) {
5828 void **inherit = (void **)cur;
5830 for (pp = begin; pp < end; pp++, inherit++)
5835 for (pp = begin; pp < end; pp++)
5839 ops->inherits = NULL;
5845 * ata_host_start - start and freeze ports of an ATA host
5846 * @host: ATA host to start ports for
5848 * Start and then freeze ports of @host. Started status is
5849 * recorded in host->flags, so this function can be called
5850 * multiple times. Ports are guaranteed to get started only
5851 * once. If host->ops isn't initialized yet, its set to the
5852 * first non-dummy port ops.
5855 * Inherited from calling layer (may sleep).
5858 * 0 if all ports are started successfully, -errno otherwise.
5860 int ata_host_start(struct ata_host *host)
5863 void *start_dr = NULL;
5866 if (host->flags & ATA_HOST_STARTED)
5869 ata_finalize_port_ops(host->ops);
5871 for (i = 0; i < host->n_ports; i++) {
5872 struct ata_port *ap = host->ports[i];
5874 ata_finalize_port_ops(ap->ops);
5876 if (!host->ops && !ata_port_is_dummy(ap))
5877 host->ops = ap->ops;
5879 if (ap->ops->port_stop)
5883 if (host->ops->host_stop)
5887 start_dr = devres_alloc(ata_host_stop, 0, GFP_KERNEL);
5892 for (i = 0; i < host->n_ports; i++) {
5893 struct ata_port *ap = host->ports[i];
5895 if (ap->ops->port_start) {
5896 rc = ap->ops->port_start(ap);
5900 "failed to start port %d (errno=%d)\n",
5905 ata_eh_freeze_port(ap);
5909 devres_add(host->dev, start_dr);
5910 host->flags |= ATA_HOST_STARTED;
5915 struct ata_port *ap = host->ports[i];
5917 if (ap->ops->port_stop)
5918 ap->ops->port_stop(ap);
5920 devres_free(start_dr);
5925 * ata_sas_host_init - Initialize a host struct
5926 * @host: host to initialize
5927 * @dev: device host is attached to
5928 * @flags: host flags
5932 * PCI/etc. bus probe sem.
5935 /* KILLME - the only user left is ipr */
5936 void ata_host_init(struct ata_host *host, struct device *dev,
5937 unsigned long flags, struct ata_port_operations *ops)
5939 spin_lock_init(&host->lock);
5940 mutex_init(&host->eh_mutex);
5942 host->flags = flags;
5946 void __ata_port_probe(struct ata_port *ap)
5948 struct ata_eh_info *ehi = &ap->link.eh_info;
5949 unsigned long flags;
5951 /* kick EH for boot probing */
5952 spin_lock_irqsave(ap->lock, flags);
5954 ehi->probe_mask |= ATA_ALL_DEVICES;
5955 ehi->action |= ATA_EH_RESET;
5956 ehi->flags |= ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET;
5958 ap->pflags &= ~ATA_PFLAG_INITIALIZING;
5959 ap->pflags |= ATA_PFLAG_LOADING;
5960 ata_port_schedule_eh(ap);
5962 spin_unlock_irqrestore(ap->lock, flags);
5965 int ata_port_probe(struct ata_port *ap)
5969 if (ap->ops->error_handler) {
5970 __ata_port_probe(ap);
5971 ata_port_wait_eh(ap);
5973 DPRINTK("ata%u: bus probe begin\n", ap->print_id);
5974 rc = ata_bus_probe(ap);
5975 DPRINTK("ata%u: bus probe end\n", ap->print_id);
5981 static void async_port_probe(void *data, async_cookie_t cookie)
5983 struct ata_port *ap = data;
5986 * If we're not allowed to scan this host in parallel,
5987 * we need to wait until all previous scans have completed
5988 * before going further.
5989 * Jeff Garzik says this is only within a controller, so we
5990 * don't need to wait for port 0, only for later ports.
5992 if (!(ap->host->flags & ATA_HOST_PARALLEL_SCAN) && ap->port_no != 0)
5993 async_synchronize_cookie(cookie);
5995 (void)ata_port_probe(ap);
5997 /* in order to keep device order, we need to synchronize at this point */
5998 async_synchronize_cookie(cookie);
6000 ata_scsi_scan_host(ap, 1);
6004 * ata_host_register - register initialized ATA host
6005 * @host: ATA host to register
6006 * @sht: template for SCSI host
6008 * Register initialized ATA host. @host is allocated using
6009 * ata_host_alloc() and fully initialized by LLD. This function
6010 * starts ports, registers @host with ATA and SCSI layers and
6011 * probe registered devices.
6014 * Inherited from calling layer (may sleep).
6017 * 0 on success, -errno otherwise.
6019 int ata_host_register(struct ata_host *host, struct scsi_host_template *sht)
6023 /* host must have been started */
6024 if (!(host->flags & ATA_HOST_STARTED)) {
6025 dev_err(host->dev, "BUG: trying to register unstarted host\n");
6030 /* Blow away unused ports. This happens when LLD can't
6031 * determine the exact number of ports to allocate at
6034 for (i = host->n_ports; host->ports[i]; i++)
6035 kfree(host->ports[i]);
6037 /* give ports names and add SCSI hosts */
6038 for (i = 0; i < host->n_ports; i++)
6039 host->ports[i]->print_id = atomic_inc_return(&ata_print_id);
6042 /* Create associated sysfs transport objects */
6043 for (i = 0; i < host->n_ports; i++) {
6044 rc = ata_tport_add(host->dev,host->ports[i]);
6050 rc = ata_scsi_add_hosts(host, sht);
6054 /* associate with ACPI nodes */
6055 ata_acpi_associate(host);
6057 /* set cable, sata_spd_limit and report */
6058 for (i = 0; i < host->n_ports; i++) {
6059 struct ata_port *ap = host->ports[i];
6060 unsigned long xfer_mask;
6062 /* set SATA cable type if still unset */
6063 if (ap->cbl == ATA_CBL_NONE && (ap->flags & ATA_FLAG_SATA))
6064 ap->cbl = ATA_CBL_SATA;
6066 /* init sata_spd_limit to the current value */
6067 sata_link_init_spd(&ap->link);
6069 sata_link_init_spd(ap->slave_link);
6071 /* print per-port info to dmesg */
6072 xfer_mask = ata_pack_xfermask(ap->pio_mask, ap->mwdma_mask,
6075 if (!ata_port_is_dummy(ap)) {
6076 ata_port_info(ap, "%cATA max %s %s\n",
6077 (ap->flags & ATA_FLAG_SATA) ? 'S' : 'P',
6078 ata_mode_string(xfer_mask),
6079 ap->link.eh_info.desc);
6080 ata_ehi_clear_desc(&ap->link.eh_info);
6082 ata_port_info(ap, "DUMMY\n");
6085 /* perform each probe asynchronously */
6086 for (i = 0; i < host->n_ports; i++) {
6087 struct ata_port *ap = host->ports[i];
6088 async_schedule(async_port_probe, ap);
6095 ata_tport_delete(host->ports[i]);
6102 * ata_host_activate - start host, request IRQ and register it
6103 * @host: target ATA host
6104 * @irq: IRQ to request
6105 * @irq_handler: irq_handler used when requesting IRQ
6106 * @irq_flags: irq_flags used when requesting IRQ
6107 * @sht: scsi_host_template to use when registering the host
6109 * After allocating an ATA host and initializing it, most libata
6110 * LLDs perform three steps to activate the host - start host,
6111 * request IRQ and register it. This helper takes necessasry
6112 * arguments and performs the three steps in one go.
6114 * An invalid IRQ skips the IRQ registration and expects the host to
6115 * have set polling mode on the port. In this case, @irq_handler
6119 * Inherited from calling layer (may sleep).
6122 * 0 on success, -errno otherwise.
6124 int ata_host_activate(struct ata_host *host, int irq,
6125 irq_handler_t irq_handler, unsigned long irq_flags,
6126 struct scsi_host_template *sht)
6130 rc = ata_host_start(host);
6134 /* Special case for polling mode */
6136 WARN_ON(irq_handler);
6137 return ata_host_register(host, sht);
6140 rc = devm_request_irq(host->dev, irq, irq_handler, irq_flags,
6141 dev_driver_string(host->dev), host);
6145 for (i = 0; i < host->n_ports; i++)
6146 ata_port_desc(host->ports[i], "irq %d", irq);
6148 rc = ata_host_register(host, sht);
6149 /* if failed, just free the IRQ and leave ports alone */
6151 devm_free_irq(host->dev, irq, host);
6157 * ata_port_detach - Detach ATA port in prepration of device removal
6158 * @ap: ATA port to be detached
6160 * Detach all ATA devices and the associated SCSI devices of @ap;
6161 * then, remove the associated SCSI host. @ap is guaranteed to
6162 * be quiescent on return from this function.
6165 * Kernel thread context (may sleep).
6167 static void ata_port_detach(struct ata_port *ap)
6169 unsigned long flags;
6171 if (!ap->ops->error_handler)
6174 /* tell EH we're leaving & flush EH */
6175 spin_lock_irqsave(ap->lock, flags);
6176 ap->pflags |= ATA_PFLAG_UNLOADING;
6177 ata_port_schedule_eh(ap);
6178 spin_unlock_irqrestore(ap->lock, flags);
6180 /* wait till EH commits suicide */
6181 ata_port_wait_eh(ap);
6183 /* it better be dead now */
6184 WARN_ON(!(ap->pflags & ATA_PFLAG_UNLOADED));
6186 cancel_delayed_work_sync(&ap->hotplug_task);
6191 for (i = 0; i < SATA_PMP_MAX_PORTS; i++)
6192 ata_tlink_delete(&ap->pmp_link[i]);
6194 ata_tport_delete(ap);
6196 /* remove the associated SCSI host */
6197 scsi_remove_host(ap->scsi_host);
6201 * ata_host_detach - Detach all ports of an ATA host
6202 * @host: Host to detach
6204 * Detach all ports of @host.
6207 * Kernel thread context (may sleep).
6209 void ata_host_detach(struct ata_host *host)
6213 for (i = 0; i < host->n_ports; i++)
6214 ata_port_detach(host->ports[i]);
6216 /* the host is dead now, dissociate ACPI */
6217 ata_acpi_dissociate(host);
6223 * ata_pci_remove_one - PCI layer callback for device removal
6224 * @pdev: PCI device that was removed
6226 * PCI layer indicates to libata via this hook that hot-unplug or
6227 * module unload event has occurred. Detach all ports. Resource
6228 * release is handled via devres.
6231 * Inherited from PCI layer (may sleep).
6233 void ata_pci_remove_one(struct pci_dev *pdev)
6235 struct device *dev = &pdev->dev;
6236 struct ata_host *host = dev_get_drvdata(dev);
6238 ata_host_detach(host);
6241 /* move to PCI subsystem */
6242 int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits)
6244 unsigned long tmp = 0;
6246 switch (bits->width) {
6249 pci_read_config_byte(pdev, bits->reg, &tmp8);
6255 pci_read_config_word(pdev, bits->reg, &tmp16);
6261 pci_read_config_dword(pdev, bits->reg, &tmp32);
6272 return (tmp == bits->val) ? 1 : 0;
6276 void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg)
6278 pci_save_state(pdev);
6279 pci_disable_device(pdev);
6281 if (mesg.event & PM_EVENT_SLEEP)
6282 pci_set_power_state(pdev, PCI_D3hot);
6285 int ata_pci_device_do_resume(struct pci_dev *pdev)
6289 pci_set_power_state(pdev, PCI_D0);
6290 pci_restore_state(pdev);
6292 rc = pcim_enable_device(pdev);
6295 "failed to enable device after resume (%d)\n", rc);
6299 pci_set_master(pdev);
6303 int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg)
6305 struct ata_host *host = dev_get_drvdata(&pdev->dev);
6308 rc = ata_host_suspend(host, mesg);
6312 ata_pci_device_do_suspend(pdev, mesg);
6317 int ata_pci_device_resume(struct pci_dev *pdev)
6319 struct ata_host *host = dev_get_drvdata(&pdev->dev);
6322 rc = ata_pci_device_do_resume(pdev);
6324 ata_host_resume(host);
6327 #endif /* CONFIG_PM */
6329 #endif /* CONFIG_PCI */
6331 static int __init ata_parse_force_one(char **cur,
6332 struct ata_force_ent *force_ent,
6333 const char **reason)
6335 /* FIXME: Currently, there's no way to tag init const data and
6336 * using __initdata causes build failure on some versions of
6337 * gcc. Once __initdataconst is implemented, add const to the
6338 * following structure.
6340 static struct ata_force_param force_tbl[] __initdata = {
6341 { "40c", .cbl = ATA_CBL_PATA40 },
6342 { "80c", .cbl = ATA_CBL_PATA80 },
6343 { "short40c", .cbl = ATA_CBL_PATA40_SHORT },
6344 { "unk", .cbl = ATA_CBL_PATA_UNK },
6345 { "ign", .cbl = ATA_CBL_PATA_IGN },
6346 { "sata", .cbl = ATA_CBL_SATA },
6347 { "1.5Gbps", .spd_limit = 1 },
6348 { "3.0Gbps", .spd_limit = 2 },
6349 { "noncq", .horkage_on = ATA_HORKAGE_NONCQ },
6350 { "ncq", .horkage_off = ATA_HORKAGE_NONCQ },
6351 { "dump_id", .horkage_on = ATA_HORKAGE_DUMP_ID },
6352 { "pio0", .xfer_mask = 1 << (ATA_SHIFT_PIO + 0) },
6353 { "pio1", .xfer_mask = 1 << (ATA_SHIFT_PIO + 1) },
6354 { "pio2", .xfer_mask = 1 << (ATA_SHIFT_PIO + 2) },
6355 { "pio3", .xfer_mask = 1 << (ATA_SHIFT_PIO + 3) },
6356 { "pio4", .xfer_mask = 1 << (ATA_SHIFT_PIO + 4) },
6357 { "pio5", .xfer_mask = 1 << (ATA_SHIFT_PIO + 5) },
6358 { "pio6", .xfer_mask = 1 << (ATA_SHIFT_PIO + 6) },
6359 { "mwdma0", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 0) },
6360 { "mwdma1", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 1) },
6361 { "mwdma2", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 2) },
6362 { "mwdma3", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 3) },
6363 { "mwdma4", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 4) },
6364 { "udma0", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 0) },
6365 { "udma16", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 0) },
6366 { "udma/16", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 0) },
6367 { "udma1", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 1) },
6368 { "udma25", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 1) },
6369 { "udma/25", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 1) },
6370 { "udma2", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 2) },
6371 { "udma33", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 2) },
6372 { "udma/33", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 2) },
6373 { "udma3", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 3) },
6374 { "udma44", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 3) },
6375 { "udma/44", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 3) },
6376 { "udma4", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 4) },
6377 { "udma66", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 4) },
6378 { "udma/66", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 4) },
6379 { "udma5", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 5) },
6380 { "udma100", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 5) },
6381 { "udma/100", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 5) },
6382 { "udma6", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 6) },
6383 { "udma133", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 6) },
6384 { "udma/133", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 6) },
6385 { "udma7", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 7) },
6386 { "nohrst", .lflags = ATA_LFLAG_NO_HRST },
6387 { "nosrst", .lflags = ATA_LFLAG_NO_SRST },
6388 { "norst", .lflags = ATA_LFLAG_NO_HRST | ATA_LFLAG_NO_SRST },
6390 char *start = *cur, *p = *cur;
6391 char *id, *val, *endp;
6392 const struct ata_force_param *match_fp = NULL;
6393 int nr_matches = 0, i;
6395 /* find where this param ends and update *cur */
6396 while (*p != '\0' && *p != ',')
6407 p = strchr(start, ':');
6409 val = strstrip(start);
6414 id = strstrip(start);
6415 val = strstrip(p + 1);
6418 p = strchr(id, '.');
6421 force_ent->device = simple_strtoul(p, &endp, 10);
6422 if (p == endp || *endp != '\0') {
6423 *reason = "invalid device";
6428 force_ent->port = simple_strtoul(id, &endp, 10);
6429 if (p == endp || *endp != '\0') {
6430 *reason = "invalid port/link";
6435 /* parse val, allow shortcuts so that both 1.5 and 1.5Gbps work */
6436 for (i = 0; i < ARRAY_SIZE(force_tbl); i++) {
6437 const struct ata_force_param *fp = &force_tbl[i];
6439 if (strncasecmp(val, fp->name, strlen(val)))
6445 if (strcasecmp(val, fp->name) == 0) {
6452 *reason = "unknown value";
6455 if (nr_matches > 1) {
6456 *reason = "ambigious value";
6460 force_ent->param = *match_fp;
6465 static void __init ata_parse_force_param(void)
6467 int idx = 0, size = 1;
6468 int last_port = -1, last_device = -1;
6469 char *p, *cur, *next;
6471 /* calculate maximum number of params and allocate force_tbl */
6472 for (p = ata_force_param_buf; *p; p++)
6476 ata_force_tbl = kzalloc(sizeof(ata_force_tbl[0]) * size, GFP_KERNEL);
6477 if (!ata_force_tbl) {
6478 printk(KERN_WARNING "ata: failed to extend force table, "
6479 "libata.force ignored\n");
6483 /* parse and populate the table */
6484 for (cur = ata_force_param_buf; *cur != '\0'; cur = next) {
6485 const char *reason = "";
6486 struct ata_force_ent te = { .port = -1, .device = -1 };
6489 if (ata_parse_force_one(&next, &te, &reason)) {
6490 printk(KERN_WARNING "ata: failed to parse force "
6491 "parameter \"%s\" (%s)\n",
6496 if (te.port == -1) {
6497 te.port = last_port;
6498 te.device = last_device;
6501 ata_force_tbl[idx++] = te;
6503 last_port = te.port;
6504 last_device = te.device;
6507 ata_force_tbl_size = idx;
6510 static int __init ata_init(void)
6514 ata_parse_force_param();
6516 rc = ata_sff_init();
6518 kfree(ata_force_tbl);
6522 libata_transport_init();
6523 ata_scsi_transport_template = ata_attach_transport();
6524 if (!ata_scsi_transport_template) {
6530 printk(KERN_DEBUG "libata version " DRV_VERSION " loaded.\n");
6537 static void __exit ata_exit(void)
6539 ata_release_transport(ata_scsi_transport_template);
6540 libata_transport_exit();
6542 kfree(ata_force_tbl);
6545 subsys_initcall(ata_init);
6546 module_exit(ata_exit);
6548 static DEFINE_RATELIMIT_STATE(ratelimit, HZ / 5, 1);
6550 int ata_ratelimit(void)
6552 return __ratelimit(&ratelimit);
6556 * ata_msleep - ATA EH owner aware msleep
6557 * @ap: ATA port to attribute the sleep to
6558 * @msecs: duration to sleep in milliseconds
6560 * Sleeps @msecs. If the current task is owner of @ap's EH, the
6561 * ownership is released before going to sleep and reacquired
6562 * after the sleep is complete. IOW, other ports sharing the
6563 * @ap->host will be allowed to own the EH while this task is
6569 void ata_msleep(struct ata_port *ap, unsigned int msecs)
6571 bool owns_eh = ap && ap->host->eh_owner == current;
6583 * ata_wait_register - wait until register value changes
6584 * @ap: ATA port to wait register for, can be NULL
6585 * @reg: IO-mapped register
6586 * @mask: Mask to apply to read register value
6587 * @val: Wait condition
6588 * @interval: polling interval in milliseconds
6589 * @timeout: timeout in milliseconds
6591 * Waiting for some bits of register to change is a common
6592 * operation for ATA controllers. This function reads 32bit LE
6593 * IO-mapped register @reg and tests for the following condition.
6595 * (*@reg & mask) != val
6597 * If the condition is met, it returns; otherwise, the process is
6598 * repeated after @interval_msec until timeout.
6601 * Kernel thread context (may sleep)
6604 * The final register value.
6606 u32 ata_wait_register(struct ata_port *ap, void __iomem *reg, u32 mask, u32 val,
6607 unsigned long interval, unsigned long timeout)
6609 unsigned long deadline;
6612 tmp = ioread32(reg);
6614 /* Calculate timeout _after_ the first read to make sure
6615 * preceding writes reach the controller before starting to
6616 * eat away the timeout.
6618 deadline = ata_deadline(jiffies, timeout);
6620 while ((tmp & mask) == val && time_before(jiffies, deadline)) {
6621 ata_msleep(ap, interval);
6622 tmp = ioread32(reg);
6631 static unsigned int ata_dummy_qc_issue(struct ata_queued_cmd *qc)
6633 return AC_ERR_SYSTEM;
6636 static void ata_dummy_error_handler(struct ata_port *ap)
6641 struct ata_port_operations ata_dummy_port_ops = {
6642 .qc_prep = ata_noop_qc_prep,
6643 .qc_issue = ata_dummy_qc_issue,
6644 .error_handler = ata_dummy_error_handler,
6647 const struct ata_port_info ata_dummy_port_info = {
6648 .port_ops = &ata_dummy_port_ops,
6652 * Utility print functions
6654 int ata_port_printk(const struct ata_port *ap, const char *level,
6655 const char *fmt, ...)
6657 struct va_format vaf;
6661 va_start(args, fmt);
6666 r = printk("%sata%u: %pV", level, ap->print_id, &vaf);
6672 EXPORT_SYMBOL(ata_port_printk);
6674 int ata_link_printk(const struct ata_link *link, const char *level,
6675 const char *fmt, ...)
6677 struct va_format vaf;
6681 va_start(args, fmt);
6686 if (sata_pmp_attached(link->ap) || link->ap->slave_link)
6687 r = printk("%sata%u.%02u: %pV",
6688 level, link->ap->print_id, link->pmp, &vaf);
6690 r = printk("%sata%u: %pV",
6691 level, link->ap->print_id, &vaf);
6697 EXPORT_SYMBOL(ata_link_printk);
6699 int ata_dev_printk(const struct ata_device *dev, const char *level,
6700 const char *fmt, ...)
6702 struct va_format vaf;
6706 va_start(args, fmt);
6711 r = printk("%sata%u.%02u: %pV",
6712 level, dev->link->ap->print_id, dev->link->pmp + dev->devno,
6719 EXPORT_SYMBOL(ata_dev_printk);
6721 void ata_print_version(const struct device *dev, const char *version)
6723 dev_printk(KERN_DEBUG, dev, "version %s\n", version);
6725 EXPORT_SYMBOL(ata_print_version);
6728 * libata is essentially a library of internal helper functions for
6729 * low-level ATA host controller drivers. As such, the API/ABI is
6730 * likely to change as new drivers are added and updated.
6731 * Do not depend on ABI/API stability.
6733 EXPORT_SYMBOL_GPL(sata_deb_timing_normal);
6734 EXPORT_SYMBOL_GPL(sata_deb_timing_hotplug);
6735 EXPORT_SYMBOL_GPL(sata_deb_timing_long);
6736 EXPORT_SYMBOL_GPL(ata_base_port_ops);
6737 EXPORT_SYMBOL_GPL(sata_port_ops);
6738 EXPORT_SYMBOL_GPL(ata_dummy_port_ops);
6739 EXPORT_SYMBOL_GPL(ata_dummy_port_info);
6740 EXPORT_SYMBOL_GPL(ata_link_next);
6741 EXPORT_SYMBOL_GPL(ata_dev_next);
6742 EXPORT_SYMBOL_GPL(ata_std_bios_param);
6743 EXPORT_SYMBOL_GPL(ata_scsi_unlock_native_capacity);
6744 EXPORT_SYMBOL_GPL(ata_host_init);
6745 EXPORT_SYMBOL_GPL(ata_host_alloc);
6746 EXPORT_SYMBOL_GPL(ata_host_alloc_pinfo);
6747 EXPORT_SYMBOL_GPL(ata_slave_link_init);
6748 EXPORT_SYMBOL_GPL(ata_host_start);
6749 EXPORT_SYMBOL_GPL(ata_host_register);
6750 EXPORT_SYMBOL_GPL(ata_host_activate);
6751 EXPORT_SYMBOL_GPL(ata_host_detach);
6752 EXPORT_SYMBOL_GPL(ata_sg_init);
6753 EXPORT_SYMBOL_GPL(ata_qc_complete);
6754 EXPORT_SYMBOL_GPL(ata_qc_complete_multiple);
6755 EXPORT_SYMBOL_GPL(atapi_cmd_type);
6756 EXPORT_SYMBOL_GPL(ata_tf_to_fis);
6757 EXPORT_SYMBOL_GPL(ata_tf_from_fis);
6758 EXPORT_SYMBOL_GPL(ata_pack_xfermask);
6759 EXPORT_SYMBOL_GPL(ata_unpack_xfermask);
6760 EXPORT_SYMBOL_GPL(ata_xfer_mask2mode);
6761 EXPORT_SYMBOL_GPL(ata_xfer_mode2mask);
6762 EXPORT_SYMBOL_GPL(ata_xfer_mode2shift);
6763 EXPORT_SYMBOL_GPL(ata_mode_string);
6764 EXPORT_SYMBOL_GPL(ata_id_xfermask);
6765 EXPORT_SYMBOL_GPL(ata_do_set_mode);
6766 EXPORT_SYMBOL_GPL(ata_std_qc_defer);
6767 EXPORT_SYMBOL_GPL(ata_noop_qc_prep);
6768 EXPORT_SYMBOL_GPL(ata_dev_disable);
6769 EXPORT_SYMBOL_GPL(sata_set_spd);
6770 EXPORT_SYMBOL_GPL(ata_wait_after_reset);
6771 EXPORT_SYMBOL_GPL(sata_link_debounce);
6772 EXPORT_SYMBOL_GPL(sata_link_resume);
6773 EXPORT_SYMBOL_GPL(sata_link_scr_lpm);
6774 EXPORT_SYMBOL_GPL(ata_std_prereset);
6775 EXPORT_SYMBOL_GPL(sata_link_hardreset);
6776 EXPORT_SYMBOL_GPL(sata_std_hardreset);
6777 EXPORT_SYMBOL_GPL(ata_std_postreset);
6778 EXPORT_SYMBOL_GPL(ata_dev_classify);
6779 EXPORT_SYMBOL_GPL(ata_dev_pair);
6780 EXPORT_SYMBOL_GPL(ata_ratelimit);
6781 EXPORT_SYMBOL_GPL(ata_msleep);
6782 EXPORT_SYMBOL_GPL(ata_wait_register);
6783 EXPORT_SYMBOL_GPL(ata_scsi_queuecmd);
6784 EXPORT_SYMBOL_GPL(ata_scsi_slave_config);
6785 EXPORT_SYMBOL_GPL(ata_scsi_slave_destroy);
6786 EXPORT_SYMBOL_GPL(ata_scsi_change_queue_depth);
6787 EXPORT_SYMBOL_GPL(__ata_change_queue_depth);
6788 EXPORT_SYMBOL_GPL(sata_scr_valid);
6789 EXPORT_SYMBOL_GPL(sata_scr_read);
6790 EXPORT_SYMBOL_GPL(sata_scr_write);
6791 EXPORT_SYMBOL_GPL(sata_scr_write_flush);
6792 EXPORT_SYMBOL_GPL(ata_link_online);
6793 EXPORT_SYMBOL_GPL(ata_link_offline);
6795 EXPORT_SYMBOL_GPL(ata_host_suspend);
6796 EXPORT_SYMBOL_GPL(ata_host_resume);
6797 #endif /* CONFIG_PM */
6798 EXPORT_SYMBOL_GPL(ata_id_string);
6799 EXPORT_SYMBOL_GPL(ata_id_c_string);
6800 EXPORT_SYMBOL_GPL(ata_do_dev_read_id);
6801 EXPORT_SYMBOL_GPL(ata_scsi_simulate);
6803 EXPORT_SYMBOL_GPL(ata_pio_need_iordy);
6804 EXPORT_SYMBOL_GPL(ata_timing_find_mode);
6805 EXPORT_SYMBOL_GPL(ata_timing_compute);
6806 EXPORT_SYMBOL_GPL(ata_timing_merge);
6807 EXPORT_SYMBOL_GPL(ata_timing_cycle2mode);
6810 EXPORT_SYMBOL_GPL(pci_test_config_bits);
6811 EXPORT_SYMBOL_GPL(ata_pci_remove_one);
6813 EXPORT_SYMBOL_GPL(ata_pci_device_do_suspend);
6814 EXPORT_SYMBOL_GPL(ata_pci_device_do_resume);
6815 EXPORT_SYMBOL_GPL(ata_pci_device_suspend);
6816 EXPORT_SYMBOL_GPL(ata_pci_device_resume);
6817 #endif /* CONFIG_PM */
6818 #endif /* CONFIG_PCI */
6820 EXPORT_SYMBOL_GPL(__ata_ehi_push_desc);
6821 EXPORT_SYMBOL_GPL(ata_ehi_push_desc);
6822 EXPORT_SYMBOL_GPL(ata_ehi_clear_desc);
6823 EXPORT_SYMBOL_GPL(ata_port_desc);
6825 EXPORT_SYMBOL_GPL(ata_port_pbar_desc);
6826 #endif /* CONFIG_PCI */
6827 EXPORT_SYMBOL_GPL(ata_port_schedule_eh);
6828 EXPORT_SYMBOL_GPL(ata_link_abort);
6829 EXPORT_SYMBOL_GPL(ata_port_abort);
6830 EXPORT_SYMBOL_GPL(ata_port_freeze);
6831 EXPORT_SYMBOL_GPL(sata_async_notification);
6832 EXPORT_SYMBOL_GPL(ata_eh_freeze_port);
6833 EXPORT_SYMBOL_GPL(ata_eh_thaw_port);
6834 EXPORT_SYMBOL_GPL(ata_eh_qc_complete);
6835 EXPORT_SYMBOL_GPL(ata_eh_qc_retry);
6836 EXPORT_SYMBOL_GPL(ata_eh_analyze_ncq_error);
6837 EXPORT_SYMBOL_GPL(ata_do_eh);
6838 EXPORT_SYMBOL_GPL(ata_std_error_handler);
6840 EXPORT_SYMBOL_GPL(ata_cable_40wire);
6841 EXPORT_SYMBOL_GPL(ata_cable_80wire);
6842 EXPORT_SYMBOL_GPL(ata_cable_unknown);
6843 EXPORT_SYMBOL_GPL(ata_cable_ignore);
6844 EXPORT_SYMBOL_GPL(ata_cable_sata);