2 * libata-core.c - helper library for ATA
4 * Maintained by: Tejun Heo <tj@kernel.org>
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/driver-api/libata.rst
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/time.h>
54 #include <linux/interrupt.h>
55 #include <linux/completion.h>
56 #include <linux/suspend.h>
57 #include <linux/workqueue.h>
58 #include <linux/scatterlist.h>
60 #include <linux/async.h>
61 #include <linux/log2.h>
62 #include <linux/slab.h>
63 #include <linux/glob.h>
64 #include <scsi/scsi.h>
65 #include <scsi/scsi_cmnd.h>
66 #include <scsi/scsi_host.h>
67 #include <linux/libata.h>
68 #include <asm/byteorder.h>
69 #include <asm/unaligned.h>
70 #include <linux/cdrom.h>
71 #include <linux/ratelimit.h>
72 #include <linux/leds.h>
73 #include <linux/pm_runtime.h>
74 #include <linux/platform_device.h>
76 #define CREATE_TRACE_POINTS
77 #include <trace/events/libata.h>
80 #include "libata-transport.h"
82 /* debounce timing parameters in msecs { interval, duration, timeout } */
83 const unsigned long sata_deb_timing_normal[] = { 5, 100, 2000 };
84 const unsigned long sata_deb_timing_hotplug[] = { 25, 500, 2000 };
85 const unsigned long sata_deb_timing_long[] = { 100, 2000, 5000 };
87 const struct ata_port_operations ata_base_port_ops = {
88 .prereset = ata_std_prereset,
89 .postreset = ata_std_postreset,
90 .error_handler = ata_std_error_handler,
91 .sched_eh = ata_std_sched_eh,
92 .end_eh = ata_std_end_eh,
95 const struct ata_port_operations sata_port_ops = {
96 .inherits = &ata_base_port_ops,
98 .qc_defer = ata_std_qc_defer,
99 .hardreset = sata_std_hardreset,
102 static unsigned int ata_dev_init_params(struct ata_device *dev,
103 u16 heads, u16 sectors);
104 static unsigned int ata_dev_set_xfermode(struct ata_device *dev);
105 static void ata_dev_xfermask(struct ata_device *dev);
106 static unsigned long ata_dev_blacklisted(const struct ata_device *dev);
108 atomic_t ata_print_id = ATOMIC_INIT(0);
110 struct ata_force_param {
114 unsigned long xfer_mask;
115 unsigned int horkage_on;
116 unsigned int horkage_off;
120 struct ata_force_ent {
123 struct ata_force_param param;
126 static struct ata_force_ent *ata_force_tbl;
127 static int ata_force_tbl_size;
129 static char ata_force_param_buf[PAGE_SIZE] __initdata;
130 /* param_buf is thrown away after initialization, disallow read */
131 module_param_string(force, ata_force_param_buf, sizeof(ata_force_param_buf), 0);
132 MODULE_PARM_DESC(force, "Force ATA configurations including cable type, link speed and transfer mode (see Documentation/admin-guide/kernel-parameters.rst for details)");
134 static int atapi_enabled = 1;
135 module_param(atapi_enabled, int, 0444);
136 MODULE_PARM_DESC(atapi_enabled, "Enable discovery of ATAPI devices (0=off, 1=on [default])");
138 static int atapi_dmadir = 0;
139 module_param(atapi_dmadir, int, 0444);
140 MODULE_PARM_DESC(atapi_dmadir, "Enable ATAPI DMADIR bridge support (0=off [default], 1=on)");
142 int atapi_passthru16 = 1;
143 module_param(atapi_passthru16, int, 0444);
144 MODULE_PARM_DESC(atapi_passthru16, "Enable ATA_16 passthru for ATAPI devices (0=off, 1=on [default])");
147 module_param_named(fua, libata_fua, int, 0444);
148 MODULE_PARM_DESC(fua, "FUA support (0=off [default], 1=on)");
150 static int ata_ignore_hpa;
151 module_param_named(ignore_hpa, ata_ignore_hpa, int, 0644);
152 MODULE_PARM_DESC(ignore_hpa, "Ignore HPA limit (0=keep BIOS limits, 1=ignore limits, using full disk)");
154 static int libata_dma_mask = ATA_DMA_MASK_ATA|ATA_DMA_MASK_ATAPI|ATA_DMA_MASK_CFA;
155 module_param_named(dma, libata_dma_mask, int, 0444);
156 MODULE_PARM_DESC(dma, "DMA enable/disable (0x1==ATA, 0x2==ATAPI, 0x4==CF)");
158 static int ata_probe_timeout;
159 module_param(ata_probe_timeout, int, 0444);
160 MODULE_PARM_DESC(ata_probe_timeout, "Set ATA probing timeout (seconds)");
162 int libata_noacpi = 0;
163 module_param_named(noacpi, libata_noacpi, int, 0444);
164 MODULE_PARM_DESC(noacpi, "Disable the use of ACPI in probe/suspend/resume (0=off [default], 1=on)");
166 int libata_allow_tpm = 0;
167 module_param_named(allow_tpm, libata_allow_tpm, int, 0444);
168 MODULE_PARM_DESC(allow_tpm, "Permit the use of TPM commands (0=off [default], 1=on)");
171 module_param(atapi_an, int, 0444);
172 MODULE_PARM_DESC(atapi_an, "Enable ATAPI AN media presence notification (0=0ff [default], 1=on)");
174 MODULE_AUTHOR("Jeff Garzik");
175 MODULE_DESCRIPTION("Library module for ATA devices");
176 MODULE_LICENSE("GPL");
177 MODULE_VERSION(DRV_VERSION);
180 static bool ata_sstatus_online(u32 sstatus)
182 return (sstatus & 0xf) == 0x3;
186 * ata_link_next - link iteration helper
187 * @link: the previous link, NULL to start
188 * @ap: ATA port containing links to iterate
189 * @mode: iteration mode, one of ATA_LITER_*
192 * Host lock or EH context.
195 * Pointer to the next link.
197 struct ata_link *ata_link_next(struct ata_link *link, struct ata_port *ap,
198 enum ata_link_iter_mode mode)
200 BUG_ON(mode != ATA_LITER_EDGE &&
201 mode != ATA_LITER_PMP_FIRST && mode != ATA_LITER_HOST_FIRST);
203 /* NULL link indicates start of iteration */
207 case ATA_LITER_PMP_FIRST:
208 if (sata_pmp_attached(ap))
211 case ATA_LITER_HOST_FIRST:
215 /* we just iterated over the host link, what's next? */
216 if (link == &ap->link)
218 case ATA_LITER_HOST_FIRST:
219 if (sata_pmp_attached(ap))
222 case ATA_LITER_PMP_FIRST:
223 if (unlikely(ap->slave_link))
224 return ap->slave_link;
230 /* slave_link excludes PMP */
231 if (unlikely(link == ap->slave_link))
234 /* we were over a PMP link */
235 if (++link < ap->pmp_link + ap->nr_pmp_links)
238 if (mode == ATA_LITER_PMP_FIRST)
245 * ata_dev_next - device iteration helper
246 * @dev: the previous device, NULL to start
247 * @link: ATA link containing devices to iterate
248 * @mode: iteration mode, one of ATA_DITER_*
251 * Host lock or EH context.
254 * Pointer to the next device.
256 struct ata_device *ata_dev_next(struct ata_device *dev, struct ata_link *link,
257 enum ata_dev_iter_mode mode)
259 BUG_ON(mode != ATA_DITER_ENABLED && mode != ATA_DITER_ENABLED_REVERSE &&
260 mode != ATA_DITER_ALL && mode != ATA_DITER_ALL_REVERSE);
262 /* NULL dev indicates start of iteration */
265 case ATA_DITER_ENABLED:
269 case ATA_DITER_ENABLED_REVERSE:
270 case ATA_DITER_ALL_REVERSE:
271 dev = link->device + ata_link_max_devices(link) - 1;
276 /* move to the next one */
278 case ATA_DITER_ENABLED:
280 if (++dev < link->device + ata_link_max_devices(link))
283 case ATA_DITER_ENABLED_REVERSE:
284 case ATA_DITER_ALL_REVERSE:
285 if (--dev >= link->device)
291 if ((mode == ATA_DITER_ENABLED || mode == ATA_DITER_ENABLED_REVERSE) &&
292 !ata_dev_enabled(dev))
298 * ata_dev_phys_link - find physical link for a device
299 * @dev: ATA device to look up physical link for
301 * Look up physical link which @dev is attached to. Note that
302 * this is different from @dev->link only when @dev is on slave
303 * link. For all other cases, it's the same as @dev->link.
309 * Pointer to the found physical link.
311 struct ata_link *ata_dev_phys_link(struct ata_device *dev)
313 struct ata_port *ap = dev->link->ap;
319 return ap->slave_link;
323 * ata_force_cbl - force cable type according to libata.force
324 * @ap: ATA port of interest
326 * Force cable type according to libata.force and whine about it.
327 * The last entry which has matching port number is used, so it
328 * can be specified as part of device force parameters. For
329 * example, both "a:40c,1.00:udma4" and "1.00:40c,udma4" have the
335 void ata_force_cbl(struct ata_port *ap)
339 for (i = ata_force_tbl_size - 1; i >= 0; i--) {
340 const struct ata_force_ent *fe = &ata_force_tbl[i];
342 if (fe->port != -1 && fe->port != ap->print_id)
345 if (fe->param.cbl == ATA_CBL_NONE)
348 ap->cbl = fe->param.cbl;
349 ata_port_notice(ap, "FORCE: cable set to %s\n", fe->param.name);
355 * ata_force_link_limits - force link limits according to libata.force
356 * @link: ATA link of interest
358 * Force link flags and SATA spd limit according to libata.force
359 * and whine about it. When only the port part is specified
360 * (e.g. 1:), the limit applies to all links connected to both
361 * the host link and all fan-out ports connected via PMP. If the
362 * device part is specified as 0 (e.g. 1.00:), it specifies the
363 * first fan-out link not the host link. Device number 15 always
364 * points to the host link whether PMP is attached or not. If the
365 * controller has slave link, device number 16 points to it.
370 static void ata_force_link_limits(struct ata_link *link)
372 bool did_spd = false;
373 int linkno = link->pmp;
376 if (ata_is_host_link(link))
379 for (i = ata_force_tbl_size - 1; i >= 0; i--) {
380 const struct ata_force_ent *fe = &ata_force_tbl[i];
382 if (fe->port != -1 && fe->port != link->ap->print_id)
385 if (fe->device != -1 && fe->device != linkno)
388 /* only honor the first spd limit */
389 if (!did_spd && fe->param.spd_limit) {
390 link->hw_sata_spd_limit = (1 << fe->param.spd_limit) - 1;
391 ata_link_notice(link, "FORCE: PHY spd limit set to %s\n",
396 /* let lflags stack */
397 if (fe->param.lflags) {
398 link->flags |= fe->param.lflags;
399 ata_link_notice(link,
400 "FORCE: link flag 0x%x forced -> 0x%x\n",
401 fe->param.lflags, link->flags);
407 * ata_force_xfermask - force xfermask according to libata.force
408 * @dev: ATA device of interest
410 * Force xfer_mask according to libata.force and whine about it.
411 * For consistency with link selection, device number 15 selects
412 * the first device connected to the host link.
417 static void ata_force_xfermask(struct ata_device *dev)
419 int devno = dev->link->pmp + dev->devno;
420 int alt_devno = devno;
423 /* allow n.15/16 for devices attached to host port */
424 if (ata_is_host_link(dev->link))
427 for (i = ata_force_tbl_size - 1; i >= 0; i--) {
428 const struct ata_force_ent *fe = &ata_force_tbl[i];
429 unsigned long pio_mask, mwdma_mask, udma_mask;
431 if (fe->port != -1 && fe->port != dev->link->ap->print_id)
434 if (fe->device != -1 && fe->device != devno &&
435 fe->device != alt_devno)
438 if (!fe->param.xfer_mask)
441 ata_unpack_xfermask(fe->param.xfer_mask,
442 &pio_mask, &mwdma_mask, &udma_mask);
444 dev->udma_mask = udma_mask;
445 else if (mwdma_mask) {
447 dev->mwdma_mask = mwdma_mask;
451 dev->pio_mask = pio_mask;
454 ata_dev_notice(dev, "FORCE: xfer_mask set to %s\n",
461 * ata_force_horkage - force horkage according to libata.force
462 * @dev: ATA device of interest
464 * Force horkage according to libata.force and whine about it.
465 * For consistency with link selection, device number 15 selects
466 * the first device connected to the host link.
471 static void ata_force_horkage(struct ata_device *dev)
473 int devno = dev->link->pmp + dev->devno;
474 int alt_devno = devno;
477 /* allow n.15/16 for devices attached to host port */
478 if (ata_is_host_link(dev->link))
481 for (i = 0; i < ata_force_tbl_size; i++) {
482 const struct ata_force_ent *fe = &ata_force_tbl[i];
484 if (fe->port != -1 && fe->port != dev->link->ap->print_id)
487 if (fe->device != -1 && fe->device != devno &&
488 fe->device != alt_devno)
491 if (!(~dev->horkage & fe->param.horkage_on) &&
492 !(dev->horkage & fe->param.horkage_off))
495 dev->horkage |= fe->param.horkage_on;
496 dev->horkage &= ~fe->param.horkage_off;
498 ata_dev_notice(dev, "FORCE: horkage modified (%s)\n",
504 * atapi_cmd_type - Determine ATAPI command type from SCSI opcode
505 * @opcode: SCSI opcode
507 * Determine ATAPI command type from @opcode.
513 * ATAPI_{READ|WRITE|READ_CD|PASS_THRU|MISC}
515 int atapi_cmd_type(u8 opcode)
524 case GPCMD_WRITE_AND_VERIFY_10:
528 case GPCMD_READ_CD_MSF:
529 return ATAPI_READ_CD;
533 if (atapi_passthru16)
534 return ATAPI_PASS_THRU;
542 * ata_tf_to_fis - Convert ATA taskfile to SATA FIS structure
543 * @tf: Taskfile to convert
544 * @pmp: Port multiplier port
545 * @is_cmd: This FIS is for command
546 * @fis: Buffer into which data will output
548 * Converts a standard ATA taskfile to a Serial ATA
549 * FIS structure (Register - Host to Device).
552 * Inherited from caller.
554 void ata_tf_to_fis(const struct ata_taskfile *tf, u8 pmp, int is_cmd, u8 *fis)
556 fis[0] = 0x27; /* Register - Host to Device FIS */
557 fis[1] = pmp & 0xf; /* Port multiplier number*/
559 fis[1] |= (1 << 7); /* bit 7 indicates Command FIS */
561 fis[2] = tf->command;
562 fis[3] = tf->feature;
569 fis[8] = tf->hob_lbal;
570 fis[9] = tf->hob_lbam;
571 fis[10] = tf->hob_lbah;
572 fis[11] = tf->hob_feature;
575 fis[13] = tf->hob_nsect;
579 fis[16] = tf->auxiliary & 0xff;
580 fis[17] = (tf->auxiliary >> 8) & 0xff;
581 fis[18] = (tf->auxiliary >> 16) & 0xff;
582 fis[19] = (tf->auxiliary >> 24) & 0xff;
586 * ata_tf_from_fis - Convert SATA FIS to ATA taskfile
587 * @fis: Buffer from which data will be input
588 * @tf: Taskfile to output
590 * Converts a serial ATA FIS structure to a standard ATA taskfile.
593 * Inherited from caller.
596 void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf)
598 tf->command = fis[2]; /* status */
599 tf->feature = fis[3]; /* error */
606 tf->hob_lbal = fis[8];
607 tf->hob_lbam = fis[9];
608 tf->hob_lbah = fis[10];
611 tf->hob_nsect = fis[13];
614 static const u8 ata_rw_cmds[] = {
618 ATA_CMD_READ_MULTI_EXT,
619 ATA_CMD_WRITE_MULTI_EXT,
623 ATA_CMD_WRITE_MULTI_FUA_EXT,
627 ATA_CMD_PIO_READ_EXT,
628 ATA_CMD_PIO_WRITE_EXT,
641 ATA_CMD_WRITE_FUA_EXT
645 * ata_rwcmd_protocol - set taskfile r/w commands and protocol
646 * @tf: command to examine and configure
647 * @dev: device tf belongs to
649 * Examine the device configuration and tf->flags to calculate
650 * the proper read/write commands and protocol to use.
655 static int ata_rwcmd_protocol(struct ata_taskfile *tf, struct ata_device *dev)
659 int index, fua, lba48, write;
661 fua = (tf->flags & ATA_TFLAG_FUA) ? 4 : 0;
662 lba48 = (tf->flags & ATA_TFLAG_LBA48) ? 2 : 0;
663 write = (tf->flags & ATA_TFLAG_WRITE) ? 1 : 0;
665 if (dev->flags & ATA_DFLAG_PIO) {
666 tf->protocol = ATA_PROT_PIO;
667 index = dev->multi_count ? 0 : 8;
668 } else if (lba48 && (dev->link->ap->flags & ATA_FLAG_PIO_LBA48)) {
669 /* Unable to use DMA due to host limitation */
670 tf->protocol = ATA_PROT_PIO;
671 index = dev->multi_count ? 0 : 8;
673 tf->protocol = ATA_PROT_DMA;
677 cmd = ata_rw_cmds[index + fua + lba48 + write];
686 * ata_tf_read_block - Read block address from ATA taskfile
687 * @tf: ATA taskfile of interest
688 * @dev: ATA device @tf belongs to
693 * Read block address from @tf. This function can handle all
694 * three address formats - LBA, LBA48 and CHS. tf->protocol and
695 * flags select the address format to use.
698 * Block address read from @tf.
700 u64 ata_tf_read_block(const struct ata_taskfile *tf, struct ata_device *dev)
704 if (tf->flags & ATA_TFLAG_LBA) {
705 if (tf->flags & ATA_TFLAG_LBA48) {
706 block |= (u64)tf->hob_lbah << 40;
707 block |= (u64)tf->hob_lbam << 32;
708 block |= (u64)tf->hob_lbal << 24;
710 block |= (tf->device & 0xf) << 24;
712 block |= tf->lbah << 16;
713 block |= tf->lbam << 8;
718 cyl = tf->lbam | (tf->lbah << 8);
719 head = tf->device & 0xf;
724 "device reported invalid CHS sector 0\n");
728 block = (cyl * dev->heads + head) * dev->sectors + sect - 1;
735 * ata_build_rw_tf - Build ATA taskfile for given read/write request
736 * @tf: Target ATA taskfile
737 * @dev: ATA device @tf belongs to
738 * @block: Block address
739 * @n_block: Number of blocks
740 * @tf_flags: RW/FUA etc...
742 * @class: IO priority class
747 * Build ATA taskfile @tf for read/write request described by
748 * @block, @n_block, @tf_flags and @tag on @dev.
752 * 0 on success, -ERANGE if the request is too large for @dev,
753 * -EINVAL if the request is invalid.
755 int ata_build_rw_tf(struct ata_taskfile *tf, struct ata_device *dev,
756 u64 block, u32 n_block, unsigned int tf_flags,
757 unsigned int tag, int class)
759 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
760 tf->flags |= tf_flags;
762 if (ata_ncq_enabled(dev) && !ata_tag_internal(tag)) {
764 if (!lba_48_ok(block, n_block))
767 tf->protocol = ATA_PROT_NCQ;
768 tf->flags |= ATA_TFLAG_LBA | ATA_TFLAG_LBA48;
770 if (tf->flags & ATA_TFLAG_WRITE)
771 tf->command = ATA_CMD_FPDMA_WRITE;
773 tf->command = ATA_CMD_FPDMA_READ;
775 tf->nsect = tag << 3;
776 tf->hob_feature = (n_block >> 8) & 0xff;
777 tf->feature = n_block & 0xff;
779 tf->hob_lbah = (block >> 40) & 0xff;
780 tf->hob_lbam = (block >> 32) & 0xff;
781 tf->hob_lbal = (block >> 24) & 0xff;
782 tf->lbah = (block >> 16) & 0xff;
783 tf->lbam = (block >> 8) & 0xff;
784 tf->lbal = block & 0xff;
786 tf->device = ATA_LBA;
787 if (tf->flags & ATA_TFLAG_FUA)
788 tf->device |= 1 << 7;
790 if (dev->flags & ATA_DFLAG_NCQ_PRIO) {
791 if (class == IOPRIO_CLASS_RT)
792 tf->hob_nsect |= ATA_PRIO_HIGH <<
795 } else if (dev->flags & ATA_DFLAG_LBA) {
796 tf->flags |= ATA_TFLAG_LBA;
798 if (lba_28_ok(block, n_block)) {
800 tf->device |= (block >> 24) & 0xf;
801 } else if (lba_48_ok(block, n_block)) {
802 if (!(dev->flags & ATA_DFLAG_LBA48))
806 tf->flags |= ATA_TFLAG_LBA48;
808 tf->hob_nsect = (n_block >> 8) & 0xff;
810 tf->hob_lbah = (block >> 40) & 0xff;
811 tf->hob_lbam = (block >> 32) & 0xff;
812 tf->hob_lbal = (block >> 24) & 0xff;
814 /* request too large even for LBA48 */
817 if (unlikely(ata_rwcmd_protocol(tf, dev) < 0))
820 tf->nsect = n_block & 0xff;
822 tf->lbah = (block >> 16) & 0xff;
823 tf->lbam = (block >> 8) & 0xff;
824 tf->lbal = block & 0xff;
826 tf->device |= ATA_LBA;
829 u32 sect, head, cyl, track;
831 /* The request -may- be too large for CHS addressing. */
832 if (!lba_28_ok(block, n_block))
835 if (unlikely(ata_rwcmd_protocol(tf, dev) < 0))
838 /* Convert LBA to CHS */
839 track = (u32)block / dev->sectors;
840 cyl = track / dev->heads;
841 head = track % dev->heads;
842 sect = (u32)block % dev->sectors + 1;
844 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
845 (u32)block, track, cyl, head, sect);
847 /* Check whether the converted CHS can fit.
851 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
854 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
865 * ata_pack_xfermask - Pack pio, mwdma and udma masks into xfer_mask
866 * @pio_mask: pio_mask
867 * @mwdma_mask: mwdma_mask
868 * @udma_mask: udma_mask
870 * Pack @pio_mask, @mwdma_mask and @udma_mask into a single
871 * unsigned int xfer_mask.
879 unsigned long ata_pack_xfermask(unsigned long pio_mask,
880 unsigned long mwdma_mask,
881 unsigned long udma_mask)
883 return ((pio_mask << ATA_SHIFT_PIO) & ATA_MASK_PIO) |
884 ((mwdma_mask << ATA_SHIFT_MWDMA) & ATA_MASK_MWDMA) |
885 ((udma_mask << ATA_SHIFT_UDMA) & ATA_MASK_UDMA);
889 * ata_unpack_xfermask - Unpack xfer_mask into pio, mwdma and udma masks
890 * @xfer_mask: xfer_mask to unpack
891 * @pio_mask: resulting pio_mask
892 * @mwdma_mask: resulting mwdma_mask
893 * @udma_mask: resulting udma_mask
895 * Unpack @xfer_mask into @pio_mask, @mwdma_mask and @udma_mask.
896 * Any NULL destination masks will be ignored.
898 void ata_unpack_xfermask(unsigned long xfer_mask, unsigned long *pio_mask,
899 unsigned long *mwdma_mask, unsigned long *udma_mask)
902 *pio_mask = (xfer_mask & ATA_MASK_PIO) >> ATA_SHIFT_PIO;
904 *mwdma_mask = (xfer_mask & ATA_MASK_MWDMA) >> ATA_SHIFT_MWDMA;
906 *udma_mask = (xfer_mask & ATA_MASK_UDMA) >> ATA_SHIFT_UDMA;
909 static const struct ata_xfer_ent {
913 { ATA_SHIFT_PIO, ATA_NR_PIO_MODES, XFER_PIO_0 },
914 { ATA_SHIFT_MWDMA, ATA_NR_MWDMA_MODES, XFER_MW_DMA_0 },
915 { ATA_SHIFT_UDMA, ATA_NR_UDMA_MODES, XFER_UDMA_0 },
920 * ata_xfer_mask2mode - Find matching XFER_* for the given xfer_mask
921 * @xfer_mask: xfer_mask of interest
923 * Return matching XFER_* value for @xfer_mask. Only the highest
924 * bit of @xfer_mask is considered.
930 * Matching XFER_* value, 0xff if no match found.
932 u8 ata_xfer_mask2mode(unsigned long xfer_mask)
934 int highbit = fls(xfer_mask) - 1;
935 const struct ata_xfer_ent *ent;
937 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
938 if (highbit >= ent->shift && highbit < ent->shift + ent->bits)
939 return ent->base + highbit - ent->shift;
944 * ata_xfer_mode2mask - Find matching xfer_mask for XFER_*
945 * @xfer_mode: XFER_* of interest
947 * Return matching xfer_mask for @xfer_mode.
953 * Matching xfer_mask, 0 if no match found.
955 unsigned long ata_xfer_mode2mask(u8 xfer_mode)
957 const struct ata_xfer_ent *ent;
959 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
960 if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits)
961 return ((2 << (ent->shift + xfer_mode - ent->base)) - 1)
962 & ~((1 << ent->shift) - 1);
967 * ata_xfer_mode2shift - Find matching xfer_shift for XFER_*
968 * @xfer_mode: XFER_* of interest
970 * Return matching xfer_shift for @xfer_mode.
976 * Matching xfer_shift, -1 if no match found.
978 int ata_xfer_mode2shift(unsigned long xfer_mode)
980 const struct ata_xfer_ent *ent;
982 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
983 if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits)
989 * ata_mode_string - convert xfer_mask to string
990 * @xfer_mask: mask of bits supported; only highest bit counts.
992 * Determine string which represents the highest speed
993 * (highest bit in @modemask).
999 * Constant C string representing highest speed listed in
1000 * @mode_mask, or the constant C string "<n/a>".
1002 const char *ata_mode_string(unsigned long xfer_mask)
1004 static const char * const xfer_mode_str[] = {
1028 highbit = fls(xfer_mask) - 1;
1029 if (highbit >= 0 && highbit < ARRAY_SIZE(xfer_mode_str))
1030 return xfer_mode_str[highbit];
1034 const char *sata_spd_string(unsigned int spd)
1036 static const char * const spd_str[] = {
1042 if (spd == 0 || (spd - 1) >= ARRAY_SIZE(spd_str))
1044 return spd_str[spd - 1];
1048 * ata_dev_classify - determine device type based on ATA-spec signature
1049 * @tf: ATA taskfile register set for device to be identified
1051 * Determine from taskfile register contents whether a device is
1052 * ATA or ATAPI, as per "Signature and persistence" section
1053 * of ATA/PI spec (volume 1, sect 5.14).
1059 * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, %ATA_DEV_PMP,
1060 * %ATA_DEV_ZAC, or %ATA_DEV_UNKNOWN the event of failure.
1062 unsigned int ata_dev_classify(const struct ata_taskfile *tf)
1064 /* Apple's open source Darwin code hints that some devices only
1065 * put a proper signature into the LBA mid/high registers,
1066 * So, we only check those. It's sufficient for uniqueness.
1068 * ATA/ATAPI-7 (d1532v1r1: Feb. 19, 2003) specified separate
1069 * signatures for ATA and ATAPI devices attached on SerialATA,
1070 * 0x3c/0xc3 and 0x69/0x96 respectively. However, SerialATA
1071 * spec has never mentioned about using different signatures
1072 * for ATA/ATAPI devices. Then, Serial ATA II: Port
1073 * Multiplier specification began to use 0x69/0x96 to identify
1074 * port multpliers and 0x3c/0xc3 to identify SEMB device.
1075 * ATA/ATAPI-7 dropped descriptions about 0x3c/0xc3 and
1076 * 0x69/0x96 shortly and described them as reserved for
1079 * We follow the current spec and consider that 0x69/0x96
1080 * identifies a port multiplier and 0x3c/0xc3 a SEMB device.
1081 * Unfortunately, WDC WD1600JS-62MHB5 (a hard drive) reports
1082 * SEMB signature. This is worked around in
1083 * ata_dev_read_id().
1085 if ((tf->lbam == 0) && (tf->lbah == 0)) {
1086 DPRINTK("found ATA device by sig\n");
1090 if ((tf->lbam == 0x14) && (tf->lbah == 0xeb)) {
1091 DPRINTK("found ATAPI device by sig\n");
1092 return ATA_DEV_ATAPI;
1095 if ((tf->lbam == 0x69) && (tf->lbah == 0x96)) {
1096 DPRINTK("found PMP device by sig\n");
1100 if ((tf->lbam == 0x3c) && (tf->lbah == 0xc3)) {
1101 DPRINTK("found SEMB device by sig (could be ATA device)\n");
1102 return ATA_DEV_SEMB;
1105 if ((tf->lbam == 0xcd) && (tf->lbah == 0xab)) {
1106 DPRINTK("found ZAC device by sig\n");
1110 DPRINTK("unknown device\n");
1111 return ATA_DEV_UNKNOWN;
1115 * ata_id_string - Convert IDENTIFY DEVICE page into string
1116 * @id: IDENTIFY DEVICE results we will examine
1117 * @s: string into which data is output
1118 * @ofs: offset into identify device page
1119 * @len: length of string to return. must be an even number.
1121 * The strings in the IDENTIFY DEVICE page are broken up into
1122 * 16-bit chunks. Run through the string, and output each
1123 * 8-bit chunk linearly, regardless of platform.
1129 void ata_id_string(const u16 *id, unsigned char *s,
1130 unsigned int ofs, unsigned int len)
1151 * ata_id_c_string - Convert IDENTIFY DEVICE page into C string
1152 * @id: IDENTIFY DEVICE results we will examine
1153 * @s: string into which data is output
1154 * @ofs: offset into identify device page
1155 * @len: length of string to return. must be an odd number.
1157 * This function is identical to ata_id_string except that it
1158 * trims trailing spaces and terminates the resulting string with
1159 * null. @len must be actual maximum length (even number) + 1.
1164 void ata_id_c_string(const u16 *id, unsigned char *s,
1165 unsigned int ofs, unsigned int len)
1169 ata_id_string(id, s, ofs, len - 1);
1171 p = s + strnlen(s, len - 1);
1172 while (p > s && p[-1] == ' ')
1177 static u64 ata_id_n_sectors(const u16 *id)
1179 if (ata_id_has_lba(id)) {
1180 if (ata_id_has_lba48(id))
1181 return ata_id_u64(id, ATA_ID_LBA_CAPACITY_2);
1183 return ata_id_u32(id, ATA_ID_LBA_CAPACITY);
1185 if (ata_id_current_chs_valid(id))
1186 return id[ATA_ID_CUR_CYLS] * id[ATA_ID_CUR_HEADS] *
1187 id[ATA_ID_CUR_SECTORS];
1189 return id[ATA_ID_CYLS] * id[ATA_ID_HEADS] *
1194 u64 ata_tf_to_lba48(const struct ata_taskfile *tf)
1198 sectors |= ((u64)(tf->hob_lbah & 0xff)) << 40;
1199 sectors |= ((u64)(tf->hob_lbam & 0xff)) << 32;
1200 sectors |= ((u64)(tf->hob_lbal & 0xff)) << 24;
1201 sectors |= (tf->lbah & 0xff) << 16;
1202 sectors |= (tf->lbam & 0xff) << 8;
1203 sectors |= (tf->lbal & 0xff);
1208 u64 ata_tf_to_lba(const struct ata_taskfile *tf)
1212 sectors |= (tf->device & 0x0f) << 24;
1213 sectors |= (tf->lbah & 0xff) << 16;
1214 sectors |= (tf->lbam & 0xff) << 8;
1215 sectors |= (tf->lbal & 0xff);
1221 * ata_read_native_max_address - Read native max address
1222 * @dev: target device
1223 * @max_sectors: out parameter for the result native max address
1225 * Perform an LBA48 or LBA28 native size query upon the device in
1229 * 0 on success, -EACCES if command is aborted by the drive.
1230 * -EIO on other errors.
1232 static int ata_read_native_max_address(struct ata_device *dev, u64 *max_sectors)
1234 unsigned int err_mask;
1235 struct ata_taskfile tf;
1236 int lba48 = ata_id_has_lba48(dev->id);
1238 ata_tf_init(dev, &tf);
1240 /* always clear all address registers */
1241 tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
1244 tf.command = ATA_CMD_READ_NATIVE_MAX_EXT;
1245 tf.flags |= ATA_TFLAG_LBA48;
1247 tf.command = ATA_CMD_READ_NATIVE_MAX;
1249 tf.protocol = ATA_PROT_NODATA;
1250 tf.device |= ATA_LBA;
1252 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
1255 "failed to read native max address (err_mask=0x%x)\n",
1257 if (err_mask == AC_ERR_DEV && (tf.feature & ATA_ABORTED))
1263 *max_sectors = ata_tf_to_lba48(&tf) + 1;
1265 *max_sectors = ata_tf_to_lba(&tf) + 1;
1266 if (dev->horkage & ATA_HORKAGE_HPA_SIZE)
1272 * ata_set_max_sectors - Set max sectors
1273 * @dev: target device
1274 * @new_sectors: new max sectors value to set for the device
1276 * Set max sectors of @dev to @new_sectors.
1279 * 0 on success, -EACCES if command is aborted or denied (due to
1280 * previous non-volatile SET_MAX) by the drive. -EIO on other
1283 static int ata_set_max_sectors(struct ata_device *dev, u64 new_sectors)
1285 unsigned int err_mask;
1286 struct ata_taskfile tf;
1287 int lba48 = ata_id_has_lba48(dev->id);
1291 ata_tf_init(dev, &tf);
1293 tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
1296 tf.command = ATA_CMD_SET_MAX_EXT;
1297 tf.flags |= ATA_TFLAG_LBA48;
1299 tf.hob_lbal = (new_sectors >> 24) & 0xff;
1300 tf.hob_lbam = (new_sectors >> 32) & 0xff;
1301 tf.hob_lbah = (new_sectors >> 40) & 0xff;
1303 tf.command = ATA_CMD_SET_MAX;
1305 tf.device |= (new_sectors >> 24) & 0xf;
1308 tf.protocol = ATA_PROT_NODATA;
1309 tf.device |= ATA_LBA;
1311 tf.lbal = (new_sectors >> 0) & 0xff;
1312 tf.lbam = (new_sectors >> 8) & 0xff;
1313 tf.lbah = (new_sectors >> 16) & 0xff;
1315 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
1318 "failed to set max address (err_mask=0x%x)\n",
1320 if (err_mask == AC_ERR_DEV &&
1321 (tf.feature & (ATA_ABORTED | ATA_IDNF)))
1330 * ata_hpa_resize - Resize a device with an HPA set
1331 * @dev: Device to resize
1333 * Read the size of an LBA28 or LBA48 disk with HPA features and resize
1334 * it if required to the full size of the media. The caller must check
1335 * the drive has the HPA feature set enabled.
1338 * 0 on success, -errno on failure.
1340 static int ata_hpa_resize(struct ata_device *dev)
1342 struct ata_eh_context *ehc = &dev->link->eh_context;
1343 int print_info = ehc->i.flags & ATA_EHI_PRINTINFO;
1344 bool unlock_hpa = ata_ignore_hpa || dev->flags & ATA_DFLAG_UNLOCK_HPA;
1345 u64 sectors = ata_id_n_sectors(dev->id);
1349 /* do we need to do it? */
1350 if ((dev->class != ATA_DEV_ATA && dev->class != ATA_DEV_ZAC) ||
1351 !ata_id_has_lba(dev->id) || !ata_id_hpa_enabled(dev->id) ||
1352 (dev->horkage & ATA_HORKAGE_BROKEN_HPA))
1355 /* read native max address */
1356 rc = ata_read_native_max_address(dev, &native_sectors);
1358 /* If device aborted the command or HPA isn't going to
1359 * be unlocked, skip HPA resizing.
1361 if (rc == -EACCES || !unlock_hpa) {
1363 "HPA support seems broken, skipping HPA handling\n");
1364 dev->horkage |= ATA_HORKAGE_BROKEN_HPA;
1366 /* we can continue if device aborted the command */
1373 dev->n_native_sectors = native_sectors;
1375 /* nothing to do? */
1376 if (native_sectors <= sectors || !unlock_hpa) {
1377 if (!print_info || native_sectors == sectors)
1380 if (native_sectors > sectors)
1382 "HPA detected: current %llu, native %llu\n",
1383 (unsigned long long)sectors,
1384 (unsigned long long)native_sectors);
1385 else if (native_sectors < sectors)
1387 "native sectors (%llu) is smaller than sectors (%llu)\n",
1388 (unsigned long long)native_sectors,
1389 (unsigned long long)sectors);
1393 /* let's unlock HPA */
1394 rc = ata_set_max_sectors(dev, native_sectors);
1395 if (rc == -EACCES) {
1396 /* if device aborted the command, skip HPA resizing */
1398 "device aborted resize (%llu -> %llu), skipping HPA handling\n",
1399 (unsigned long long)sectors,
1400 (unsigned long long)native_sectors);
1401 dev->horkage |= ATA_HORKAGE_BROKEN_HPA;
1406 /* re-read IDENTIFY data */
1407 rc = ata_dev_reread_id(dev, 0);
1410 "failed to re-read IDENTIFY data after HPA resizing\n");
1415 u64 new_sectors = ata_id_n_sectors(dev->id);
1417 "HPA unlocked: %llu -> %llu, native %llu\n",
1418 (unsigned long long)sectors,
1419 (unsigned long long)new_sectors,
1420 (unsigned long long)native_sectors);
1427 * ata_dump_id - IDENTIFY DEVICE info debugging output
1428 * @id: IDENTIFY DEVICE page to dump
1430 * Dump selected 16-bit words from the given IDENTIFY DEVICE
1437 static inline void ata_dump_id(const u16 *id)
1439 DPRINTK("49==0x%04x "
1449 DPRINTK("80==0x%04x "
1459 DPRINTK("88==0x%04x "
1466 * ata_id_xfermask - Compute xfermask from the given IDENTIFY data
1467 * @id: IDENTIFY data to compute xfer mask from
1469 * Compute the xfermask for this device. This is not as trivial
1470 * as it seems if we must consider early devices correctly.
1472 * FIXME: pre IDE drive timing (do we care ?).
1480 unsigned long ata_id_xfermask(const u16 *id)
1482 unsigned long pio_mask, mwdma_mask, udma_mask;
1484 /* Usual case. Word 53 indicates word 64 is valid */
1485 if (id[ATA_ID_FIELD_VALID] & (1 << 1)) {
1486 pio_mask = id[ATA_ID_PIO_MODES] & 0x03;
1490 /* If word 64 isn't valid then Word 51 high byte holds
1491 * the PIO timing number for the maximum. Turn it into
1494 u8 mode = (id[ATA_ID_OLD_PIO_MODES] >> 8) & 0xFF;
1495 if (mode < 5) /* Valid PIO range */
1496 pio_mask = (2 << mode) - 1;
1500 /* But wait.. there's more. Design your standards by
1501 * committee and you too can get a free iordy field to
1502 * process. However its the speeds not the modes that
1503 * are supported... Note drivers using the timing API
1504 * will get this right anyway
1508 mwdma_mask = id[ATA_ID_MWDMA_MODES] & 0x07;
1510 if (ata_id_is_cfa(id)) {
1512 * Process compact flash extended modes
1514 int pio = (id[ATA_ID_CFA_MODES] >> 0) & 0x7;
1515 int dma = (id[ATA_ID_CFA_MODES] >> 3) & 0x7;
1518 pio_mask |= (1 << 5);
1520 pio_mask |= (1 << 6);
1522 mwdma_mask |= (1 << 3);
1524 mwdma_mask |= (1 << 4);
1528 if (id[ATA_ID_FIELD_VALID] & (1 << 2))
1529 udma_mask = id[ATA_ID_UDMA_MODES] & 0xff;
1531 return ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask);
1534 static void ata_qc_complete_internal(struct ata_queued_cmd *qc)
1536 struct completion *waiting = qc->private_data;
1542 * ata_exec_internal_sg - execute libata internal command
1543 * @dev: Device to which the command is sent
1544 * @tf: Taskfile registers for the command and the result
1545 * @cdb: CDB for packet command
1546 * @dma_dir: Data transfer direction of the command
1547 * @sgl: sg list for the data buffer of the command
1548 * @n_elem: Number of sg entries
1549 * @timeout: Timeout in msecs (0 for default)
1551 * Executes libata internal command with timeout. @tf contains
1552 * command on entry and result on return. Timeout and error
1553 * conditions are reported via return value. No recovery action
1554 * is taken after a command times out. It's caller's duty to
1555 * clean up after timeout.
1558 * None. Should be called with kernel context, might sleep.
1561 * Zero on success, AC_ERR_* mask on failure
1563 unsigned ata_exec_internal_sg(struct ata_device *dev,
1564 struct ata_taskfile *tf, const u8 *cdb,
1565 int dma_dir, struct scatterlist *sgl,
1566 unsigned int n_elem, unsigned long timeout)
1568 struct ata_link *link = dev->link;
1569 struct ata_port *ap = link->ap;
1570 u8 command = tf->command;
1571 int auto_timeout = 0;
1572 struct ata_queued_cmd *qc;
1573 unsigned int preempted_tag;
1574 u32 preempted_sactive;
1575 u64 preempted_qc_active;
1576 int preempted_nr_active_links;
1577 DECLARE_COMPLETION_ONSTACK(wait);
1578 unsigned long flags;
1579 unsigned int err_mask;
1582 spin_lock_irqsave(ap->lock, flags);
1584 /* no internal command while frozen */
1585 if (ap->pflags & ATA_PFLAG_FROZEN) {
1586 spin_unlock_irqrestore(ap->lock, flags);
1587 return AC_ERR_SYSTEM;
1590 /* initialize internal qc */
1591 qc = __ata_qc_from_tag(ap, ATA_TAG_INTERNAL);
1593 qc->tag = ATA_TAG_INTERNAL;
1600 preempted_tag = link->active_tag;
1601 preempted_sactive = link->sactive;
1602 preempted_qc_active = ap->qc_active;
1603 preempted_nr_active_links = ap->nr_active_links;
1604 link->active_tag = ATA_TAG_POISON;
1607 ap->nr_active_links = 0;
1609 /* prepare & issue qc */
1612 memcpy(qc->cdb, cdb, ATAPI_CDB_LEN);
1614 /* some SATA bridges need us to indicate data xfer direction */
1615 if (tf->protocol == ATAPI_PROT_DMA && (dev->flags & ATA_DFLAG_DMADIR) &&
1616 dma_dir == DMA_FROM_DEVICE)
1617 qc->tf.feature |= ATAPI_DMADIR;
1619 qc->flags |= ATA_QCFLAG_RESULT_TF;
1620 qc->dma_dir = dma_dir;
1621 if (dma_dir != DMA_NONE) {
1622 unsigned int i, buflen = 0;
1623 struct scatterlist *sg;
1625 for_each_sg(sgl, sg, n_elem, i)
1626 buflen += sg->length;
1628 ata_sg_init(qc, sgl, n_elem);
1629 qc->nbytes = buflen;
1632 qc->private_data = &wait;
1633 qc->complete_fn = ata_qc_complete_internal;
1637 spin_unlock_irqrestore(ap->lock, flags);
1640 if (ata_probe_timeout)
1641 timeout = ata_probe_timeout * 1000;
1643 timeout = ata_internal_cmd_timeout(dev, command);
1648 if (ap->ops->error_handler)
1651 rc = wait_for_completion_timeout(&wait, msecs_to_jiffies(timeout));
1653 if (ap->ops->error_handler)
1656 ata_sff_flush_pio_task(ap);
1659 spin_lock_irqsave(ap->lock, flags);
1661 /* We're racing with irq here. If we lose, the
1662 * following test prevents us from completing the qc
1663 * twice. If we win, the port is frozen and will be
1664 * cleaned up by ->post_internal_cmd().
1666 if (qc->flags & ATA_QCFLAG_ACTIVE) {
1667 qc->err_mask |= AC_ERR_TIMEOUT;
1669 if (ap->ops->error_handler)
1670 ata_port_freeze(ap);
1672 ata_qc_complete(qc);
1674 if (ata_msg_warn(ap))
1675 ata_dev_warn(dev, "qc timeout (cmd 0x%x)\n",
1679 spin_unlock_irqrestore(ap->lock, flags);
1682 /* do post_internal_cmd */
1683 if (ap->ops->post_internal_cmd)
1684 ap->ops->post_internal_cmd(qc);
1686 /* perform minimal error analysis */
1687 if (qc->flags & ATA_QCFLAG_FAILED) {
1688 if (qc->result_tf.command & (ATA_ERR | ATA_DF))
1689 qc->err_mask |= AC_ERR_DEV;
1692 qc->err_mask |= AC_ERR_OTHER;
1694 if (qc->err_mask & ~AC_ERR_OTHER)
1695 qc->err_mask &= ~AC_ERR_OTHER;
1696 } else if (qc->tf.command == ATA_CMD_REQ_SENSE_DATA) {
1697 qc->result_tf.command |= ATA_SENSE;
1701 spin_lock_irqsave(ap->lock, flags);
1703 *tf = qc->result_tf;
1704 err_mask = qc->err_mask;
1707 link->active_tag = preempted_tag;
1708 link->sactive = preempted_sactive;
1709 ap->qc_active = preempted_qc_active;
1710 ap->nr_active_links = preempted_nr_active_links;
1712 spin_unlock_irqrestore(ap->lock, flags);
1714 if ((err_mask & AC_ERR_TIMEOUT) && auto_timeout)
1715 ata_internal_cmd_timed_out(dev, command);
1721 * ata_exec_internal - execute libata internal command
1722 * @dev: Device to which the command is sent
1723 * @tf: Taskfile registers for the command and the result
1724 * @cdb: CDB for packet command
1725 * @dma_dir: Data transfer direction of the command
1726 * @buf: Data buffer of the command
1727 * @buflen: Length of data buffer
1728 * @timeout: Timeout in msecs (0 for default)
1730 * Wrapper around ata_exec_internal_sg() which takes simple
1731 * buffer instead of sg list.
1734 * None. Should be called with kernel context, might sleep.
1737 * Zero on success, AC_ERR_* mask on failure
1739 unsigned ata_exec_internal(struct ata_device *dev,
1740 struct ata_taskfile *tf, const u8 *cdb,
1741 int dma_dir, void *buf, unsigned int buflen,
1742 unsigned long timeout)
1744 struct scatterlist *psg = NULL, sg;
1745 unsigned int n_elem = 0;
1747 if (dma_dir != DMA_NONE) {
1749 sg_init_one(&sg, buf, buflen);
1754 return ata_exec_internal_sg(dev, tf, cdb, dma_dir, psg, n_elem,
1759 * ata_pio_need_iordy - check if iordy needed
1762 * Check if the current speed of the device requires IORDY. Used
1763 * by various controllers for chip configuration.
1765 unsigned int ata_pio_need_iordy(const struct ata_device *adev)
1767 /* Don't set IORDY if we're preparing for reset. IORDY may
1768 * lead to controller lock up on certain controllers if the
1769 * port is not occupied. See bko#11703 for details.
1771 if (adev->link->ap->pflags & ATA_PFLAG_RESETTING)
1773 /* Controller doesn't support IORDY. Probably a pointless
1774 * check as the caller should know this.
1776 if (adev->link->ap->flags & ATA_FLAG_NO_IORDY)
1778 /* CF spec. r4.1 Table 22 says no iordy on PIO5 and PIO6. */
1779 if (ata_id_is_cfa(adev->id)
1780 && (adev->pio_mode == XFER_PIO_5 || adev->pio_mode == XFER_PIO_6))
1782 /* PIO3 and higher it is mandatory */
1783 if (adev->pio_mode > XFER_PIO_2)
1785 /* We turn it on when possible */
1786 if (ata_id_has_iordy(adev->id))
1792 * ata_pio_mask_no_iordy - Return the non IORDY mask
1795 * Compute the highest mode possible if we are not using iordy. Return
1796 * -1 if no iordy mode is available.
1798 static u32 ata_pio_mask_no_iordy(const struct ata_device *adev)
1800 /* If we have no drive specific rule, then PIO 2 is non IORDY */
1801 if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE */
1802 u16 pio = adev->id[ATA_ID_EIDE_PIO];
1803 /* Is the speed faster than the drive allows non IORDY ? */
1805 /* This is cycle times not frequency - watch the logic! */
1806 if (pio > 240) /* PIO2 is 240nS per cycle */
1807 return 3 << ATA_SHIFT_PIO;
1808 return 7 << ATA_SHIFT_PIO;
1811 return 3 << ATA_SHIFT_PIO;
1815 * ata_do_dev_read_id - default ID read method
1817 * @tf: proposed taskfile
1820 * Issue the identify taskfile and hand back the buffer containing
1821 * identify data. For some RAID controllers and for pre ATA devices
1822 * this function is wrapped or replaced by the driver
1824 unsigned int ata_do_dev_read_id(struct ata_device *dev,
1825 struct ata_taskfile *tf, u16 *id)
1827 return ata_exec_internal(dev, tf, NULL, DMA_FROM_DEVICE,
1828 id, sizeof(id[0]) * ATA_ID_WORDS, 0);
1832 * ata_dev_read_id - Read ID data from the specified device
1833 * @dev: target device
1834 * @p_class: pointer to class of the target device (may be changed)
1835 * @flags: ATA_READID_* flags
1836 * @id: buffer to read IDENTIFY data into
1838 * Read ID data from the specified device. ATA_CMD_ID_ATA is
1839 * performed on ATA devices and ATA_CMD_ID_ATAPI on ATAPI
1840 * devices. This function also issues ATA_CMD_INIT_DEV_PARAMS
1841 * for pre-ATA4 drives.
1843 * FIXME: ATA_CMD_ID_ATA is optional for early drives and right
1844 * now we abort if we hit that case.
1847 * Kernel thread context (may sleep)
1850 * 0 on success, -errno otherwise.
1852 int ata_dev_read_id(struct ata_device *dev, unsigned int *p_class,
1853 unsigned int flags, u16 *id)
1855 struct ata_port *ap = dev->link->ap;
1856 unsigned int class = *p_class;
1857 struct ata_taskfile tf;
1858 unsigned int err_mask = 0;
1860 bool is_semb = class == ATA_DEV_SEMB;
1861 int may_fallback = 1, tried_spinup = 0;
1864 if (ata_msg_ctl(ap))
1865 ata_dev_dbg(dev, "%s: ENTER\n", __func__);
1868 ata_tf_init(dev, &tf);
1872 class = ATA_DEV_ATA; /* some hard drives report SEMB sig */
1876 tf.command = ATA_CMD_ID_ATA;
1879 tf.command = ATA_CMD_ID_ATAPI;
1883 reason = "unsupported class";
1887 tf.protocol = ATA_PROT_PIO;
1889 /* Some devices choke if TF registers contain garbage. Make
1890 * sure those are properly initialized.
1892 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
1894 /* Device presence detection is unreliable on some
1895 * controllers. Always poll IDENTIFY if available.
1897 tf.flags |= ATA_TFLAG_POLLING;
1899 if (ap->ops->read_id)
1900 err_mask = ap->ops->read_id(dev, &tf, id);
1902 err_mask = ata_do_dev_read_id(dev, &tf, id);
1905 if (err_mask & AC_ERR_NODEV_HINT) {
1906 ata_dev_dbg(dev, "NODEV after polling detection\n");
1912 "IDENTIFY failed on device w/ SEMB sig, disabled\n");
1913 /* SEMB is not supported yet */
1914 *p_class = ATA_DEV_SEMB_UNSUP;
1918 if ((err_mask == AC_ERR_DEV) && (tf.feature & ATA_ABORTED)) {
1919 /* Device or controller might have reported
1920 * the wrong device class. Give a shot at the
1921 * other IDENTIFY if the current one is
1922 * aborted by the device.
1927 if (class == ATA_DEV_ATA)
1928 class = ATA_DEV_ATAPI;
1930 class = ATA_DEV_ATA;
1934 /* Control reaches here iff the device aborted
1935 * both flavors of IDENTIFYs which happens
1936 * sometimes with phantom devices.
1939 "both IDENTIFYs aborted, assuming NODEV\n");
1944 reason = "I/O error";
1948 if (dev->horkage & ATA_HORKAGE_DUMP_ID) {
1949 ata_dev_dbg(dev, "dumping IDENTIFY data, "
1950 "class=%d may_fallback=%d tried_spinup=%d\n",
1951 class, may_fallback, tried_spinup);
1952 print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET,
1953 16, 2, id, ATA_ID_WORDS * sizeof(*id), true);
1956 /* Falling back doesn't make sense if ID data was read
1957 * successfully at least once.
1961 swap_buf_le16(id, ATA_ID_WORDS);
1965 reason = "device reports invalid type";
1967 if (class == ATA_DEV_ATA || class == ATA_DEV_ZAC) {
1968 if (!ata_id_is_ata(id) && !ata_id_is_cfa(id))
1970 if (ap->host->flags & ATA_HOST_IGNORE_ATA &&
1971 ata_id_is_ata(id)) {
1973 "host indicates ignore ATA devices, ignored\n");
1977 if (ata_id_is_ata(id))
1981 if (!tried_spinup && (id[2] == 0x37c8 || id[2] == 0x738c)) {
1984 * Drive powered-up in standby mode, and requires a specific
1985 * SET_FEATURES spin-up subcommand before it will accept
1986 * anything other than the original IDENTIFY command.
1988 err_mask = ata_dev_set_feature(dev, SETFEATURES_SPINUP, 0);
1989 if (err_mask && id[2] != 0x738c) {
1991 reason = "SPINUP failed";
1995 * If the drive initially returned incomplete IDENTIFY info,
1996 * we now must reissue the IDENTIFY command.
1998 if (id[2] == 0x37c8)
2002 if ((flags & ATA_READID_POSTRESET) &&
2003 (class == ATA_DEV_ATA || class == ATA_DEV_ZAC)) {
2005 * The exact sequence expected by certain pre-ATA4 drives is:
2007 * IDENTIFY (optional in early ATA)
2008 * INITIALIZE DEVICE PARAMETERS (later IDE and ATA)
2010 * Some drives were very specific about that exact sequence.
2012 * Note that ATA4 says lba is mandatory so the second check
2013 * should never trigger.
2015 if (ata_id_major_version(id) < 4 || !ata_id_has_lba(id)) {
2016 err_mask = ata_dev_init_params(dev, id[3], id[6]);
2019 reason = "INIT_DEV_PARAMS failed";
2023 /* current CHS translation info (id[53-58]) might be
2024 * changed. reread the identify device info.
2026 flags &= ~ATA_READID_POSTRESET;
2036 if (ata_msg_warn(ap))
2037 ata_dev_warn(dev, "failed to IDENTIFY (%s, err_mask=0x%x)\n",
2043 * ata_read_log_page - read a specific log page
2044 * @dev: target device
2046 * @page: page to read
2047 * @buf: buffer to store read page
2048 * @sectors: number of sectors to read
2050 * Read log page using READ_LOG_EXT command.
2053 * Kernel thread context (may sleep).
2056 * 0 on success, AC_ERR_* mask otherwise.
2058 unsigned int ata_read_log_page(struct ata_device *dev, u8 log,
2059 u8 page, void *buf, unsigned int sectors)
2061 unsigned long ap_flags = dev->link->ap->flags;
2062 struct ata_taskfile tf;
2063 unsigned int err_mask;
2066 DPRINTK("read log page - log 0x%x, page 0x%x\n", log, page);
2069 * Return error without actually issuing the command on controllers
2070 * which e.g. lockup on a read log page.
2072 if (ap_flags & ATA_FLAG_NO_LOG_PAGE)
2076 ata_tf_init(dev, &tf);
2077 if (dev->dma_mode && ata_id_has_read_log_dma_ext(dev->id) &&
2078 !(dev->horkage & ATA_HORKAGE_NO_DMA_LOG)) {
2079 tf.command = ATA_CMD_READ_LOG_DMA_EXT;
2080 tf.protocol = ATA_PROT_DMA;
2083 tf.command = ATA_CMD_READ_LOG_EXT;
2084 tf.protocol = ATA_PROT_PIO;
2090 tf.hob_nsect = sectors >> 8;
2091 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_LBA48 | ATA_TFLAG_DEVICE;
2093 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_FROM_DEVICE,
2094 buf, sectors * ATA_SECT_SIZE, 0);
2096 if (err_mask && dma) {
2097 dev->horkage |= ATA_HORKAGE_NO_DMA_LOG;
2098 ata_dev_warn(dev, "READ LOG DMA EXT failed, trying PIO\n");
2102 DPRINTK("EXIT, err_mask=%x\n", err_mask);
2106 static bool ata_log_supported(struct ata_device *dev, u8 log)
2108 struct ata_port *ap = dev->link->ap;
2110 if (ata_read_log_page(dev, ATA_LOG_DIRECTORY, 0, ap->sector_buf, 1))
2112 return get_unaligned_le16(&ap->sector_buf[log * 2]) ? true : false;
2115 static bool ata_identify_page_supported(struct ata_device *dev, u8 page)
2117 struct ata_port *ap = dev->link->ap;
2118 unsigned int err, i;
2120 if (!ata_log_supported(dev, ATA_LOG_IDENTIFY_DEVICE)) {
2121 ata_dev_warn(dev, "ATA Identify Device Log not supported\n");
2126 * Read IDENTIFY DEVICE data log, page 0, to figure out if the page is
2129 err = ata_read_log_page(dev, ATA_LOG_IDENTIFY_DEVICE, 0, ap->sector_buf,
2133 "failed to get Device Identify Log Emask 0x%x\n",
2138 for (i = 0; i < ap->sector_buf[8]; i++) {
2139 if (ap->sector_buf[9 + i] == page)
2146 static int ata_do_link_spd_horkage(struct ata_device *dev)
2148 struct ata_link *plink = ata_dev_phys_link(dev);
2149 u32 target, target_limit;
2151 if (!sata_scr_valid(plink))
2154 if (dev->horkage & ATA_HORKAGE_1_5_GBPS)
2159 target_limit = (1 << target) - 1;
2161 /* if already on stricter limit, no need to push further */
2162 if (plink->sata_spd_limit <= target_limit)
2165 plink->sata_spd_limit = target_limit;
2167 /* Request another EH round by returning -EAGAIN if link is
2168 * going faster than the target speed. Forward progress is
2169 * guaranteed by setting sata_spd_limit to target_limit above.
2171 if (plink->sata_spd > target) {
2172 ata_dev_info(dev, "applying link speed limit horkage to %s\n",
2173 sata_spd_string(target));
2179 static inline u8 ata_dev_knobble(struct ata_device *dev)
2181 struct ata_port *ap = dev->link->ap;
2183 if (ata_dev_blacklisted(dev) & ATA_HORKAGE_BRIDGE_OK)
2186 return ((ap->cbl == ATA_CBL_SATA) && (!ata_id_is_sata(dev->id)));
2189 static void ata_dev_config_ncq_send_recv(struct ata_device *dev)
2191 struct ata_port *ap = dev->link->ap;
2192 unsigned int err_mask;
2194 if (!ata_log_supported(dev, ATA_LOG_NCQ_SEND_RECV)) {
2195 ata_dev_warn(dev, "NCQ Send/Recv Log not supported\n");
2198 err_mask = ata_read_log_page(dev, ATA_LOG_NCQ_SEND_RECV,
2199 0, ap->sector_buf, 1);
2202 "failed to get NCQ Send/Recv Log Emask 0x%x\n",
2205 u8 *cmds = dev->ncq_send_recv_cmds;
2207 dev->flags |= ATA_DFLAG_NCQ_SEND_RECV;
2208 memcpy(cmds, ap->sector_buf, ATA_LOG_NCQ_SEND_RECV_SIZE);
2210 if (dev->horkage & ATA_HORKAGE_NO_NCQ_TRIM) {
2211 ata_dev_dbg(dev, "disabling queued TRIM support\n");
2212 cmds[ATA_LOG_NCQ_SEND_RECV_DSM_OFFSET] &=
2213 ~ATA_LOG_NCQ_SEND_RECV_DSM_TRIM;
2218 static void ata_dev_config_ncq_non_data(struct ata_device *dev)
2220 struct ata_port *ap = dev->link->ap;
2221 unsigned int err_mask;
2223 if (!ata_log_supported(dev, ATA_LOG_NCQ_NON_DATA)) {
2225 "NCQ Send/Recv Log not supported\n");
2228 err_mask = ata_read_log_page(dev, ATA_LOG_NCQ_NON_DATA,
2229 0, ap->sector_buf, 1);
2232 "failed to get NCQ Non-Data Log Emask 0x%x\n",
2235 u8 *cmds = dev->ncq_non_data_cmds;
2237 memcpy(cmds, ap->sector_buf, ATA_LOG_NCQ_NON_DATA_SIZE);
2241 static void ata_dev_config_ncq_prio(struct ata_device *dev)
2243 struct ata_port *ap = dev->link->ap;
2244 unsigned int err_mask;
2246 if (!(dev->flags & ATA_DFLAG_NCQ_PRIO_ENABLE)) {
2247 dev->flags &= ~ATA_DFLAG_NCQ_PRIO;
2251 err_mask = ata_read_log_page(dev,
2252 ATA_LOG_IDENTIFY_DEVICE,
2253 ATA_LOG_SATA_SETTINGS,
2258 "failed to get Identify Device data, Emask 0x%x\n",
2263 if (ap->sector_buf[ATA_LOG_NCQ_PRIO_OFFSET] & BIT(3)) {
2264 dev->flags |= ATA_DFLAG_NCQ_PRIO;
2266 dev->flags &= ~ATA_DFLAG_NCQ_PRIO;
2267 ata_dev_dbg(dev, "SATA page does not support priority\n");
2272 static int ata_dev_config_ncq(struct ata_device *dev,
2273 char *desc, size_t desc_sz)
2275 struct ata_port *ap = dev->link->ap;
2276 int hdepth = 0, ddepth = ata_id_queue_depth(dev->id);
2277 unsigned int err_mask;
2280 if (!ata_id_has_ncq(dev->id)) {
2284 if (dev->horkage & ATA_HORKAGE_NONCQ) {
2285 snprintf(desc, desc_sz, "NCQ (not used)");
2288 if (ap->flags & ATA_FLAG_NCQ) {
2289 hdepth = min(ap->scsi_host->can_queue, ATA_MAX_QUEUE);
2290 dev->flags |= ATA_DFLAG_NCQ;
2293 if (!(dev->horkage & ATA_HORKAGE_BROKEN_FPDMA_AA) &&
2294 (ap->flags & ATA_FLAG_FPDMA_AA) &&
2295 ata_id_has_fpdma_aa(dev->id)) {
2296 err_mask = ata_dev_set_feature(dev, SETFEATURES_SATA_ENABLE,
2300 "failed to enable AA (error_mask=0x%x)\n",
2302 if (err_mask != AC_ERR_DEV) {
2303 dev->horkage |= ATA_HORKAGE_BROKEN_FPDMA_AA;
2310 if (hdepth >= ddepth)
2311 snprintf(desc, desc_sz, "NCQ (depth %d)%s", ddepth, aa_desc);
2313 snprintf(desc, desc_sz, "NCQ (depth %d/%d)%s", hdepth,
2316 if ((ap->flags & ATA_FLAG_FPDMA_AUX)) {
2317 if (ata_id_has_ncq_send_and_recv(dev->id))
2318 ata_dev_config_ncq_send_recv(dev);
2319 if (ata_id_has_ncq_non_data(dev->id))
2320 ata_dev_config_ncq_non_data(dev);
2321 if (ata_id_has_ncq_prio(dev->id))
2322 ata_dev_config_ncq_prio(dev);
2328 static void ata_dev_config_sense_reporting(struct ata_device *dev)
2330 unsigned int err_mask;
2332 if (!ata_id_has_sense_reporting(dev->id))
2335 if (ata_id_sense_reporting_enabled(dev->id))
2338 err_mask = ata_dev_set_feature(dev, SETFEATURE_SENSE_DATA, 0x1);
2341 "failed to enable Sense Data Reporting, Emask 0x%x\n",
2346 static void ata_dev_config_zac(struct ata_device *dev)
2348 struct ata_port *ap = dev->link->ap;
2349 unsigned int err_mask;
2350 u8 *identify_buf = ap->sector_buf;
2352 dev->zac_zones_optimal_open = U32_MAX;
2353 dev->zac_zones_optimal_nonseq = U32_MAX;
2354 dev->zac_zones_max_open = U32_MAX;
2357 * Always set the 'ZAC' flag for Host-managed devices.
2359 if (dev->class == ATA_DEV_ZAC)
2360 dev->flags |= ATA_DFLAG_ZAC;
2361 else if (ata_id_zoned_cap(dev->id) == 0x01)
2363 * Check for host-aware devices.
2365 dev->flags |= ATA_DFLAG_ZAC;
2367 if (!(dev->flags & ATA_DFLAG_ZAC))
2370 if (!ata_identify_page_supported(dev, ATA_LOG_ZONED_INFORMATION)) {
2372 "ATA Zoned Information Log not supported\n");
2377 * Read IDENTIFY DEVICE data log, page 9 (Zoned-device information)
2379 err_mask = ata_read_log_page(dev, ATA_LOG_IDENTIFY_DEVICE,
2380 ATA_LOG_ZONED_INFORMATION,
2383 u64 zoned_cap, opt_open, opt_nonseq, max_open;
2385 zoned_cap = get_unaligned_le64(&identify_buf[8]);
2386 if ((zoned_cap >> 63))
2387 dev->zac_zoned_cap = (zoned_cap & 1);
2388 opt_open = get_unaligned_le64(&identify_buf[24]);
2389 if ((opt_open >> 63))
2390 dev->zac_zones_optimal_open = (u32)opt_open;
2391 opt_nonseq = get_unaligned_le64(&identify_buf[32]);
2392 if ((opt_nonseq >> 63))
2393 dev->zac_zones_optimal_nonseq = (u32)opt_nonseq;
2394 max_open = get_unaligned_le64(&identify_buf[40]);
2395 if ((max_open >> 63))
2396 dev->zac_zones_max_open = (u32)max_open;
2400 static void ata_dev_config_trusted(struct ata_device *dev)
2402 struct ata_port *ap = dev->link->ap;
2406 if (!ata_id_has_trusted(dev->id))
2409 if (!ata_identify_page_supported(dev, ATA_LOG_SECURITY)) {
2411 "Security Log not supported\n");
2415 err = ata_read_log_page(dev, ATA_LOG_IDENTIFY_DEVICE, ATA_LOG_SECURITY,
2419 "failed to read Security Log, Emask 0x%x\n", err);
2423 trusted_cap = get_unaligned_le64(&ap->sector_buf[40]);
2424 if (!(trusted_cap & (1ULL << 63))) {
2426 "Trusted Computing capability qword not valid!\n");
2430 if (trusted_cap & (1 << 0))
2431 dev->flags |= ATA_DFLAG_TRUSTED;
2435 * ata_dev_configure - Configure the specified ATA/ATAPI device
2436 * @dev: Target device to configure
2438 * Configure @dev according to @dev->id. Generic and low-level
2439 * driver specific fixups are also applied.
2442 * Kernel thread context (may sleep)
2445 * 0 on success, -errno otherwise
2447 int ata_dev_configure(struct ata_device *dev)
2449 struct ata_port *ap = dev->link->ap;
2450 struct ata_eh_context *ehc = &dev->link->eh_context;
2451 int print_info = ehc->i.flags & ATA_EHI_PRINTINFO;
2452 const u16 *id = dev->id;
2453 unsigned long xfer_mask;
2454 unsigned int err_mask;
2455 char revbuf[7]; /* XYZ-99\0 */
2456 char fwrevbuf[ATA_ID_FW_REV_LEN+1];
2457 char modelbuf[ATA_ID_PROD_LEN+1];
2460 if (!ata_dev_enabled(dev) && ata_msg_info(ap)) {
2461 ata_dev_info(dev, "%s: ENTER/EXIT -- nodev\n", __func__);
2465 if (ata_msg_probe(ap))
2466 ata_dev_dbg(dev, "%s: ENTER\n", __func__);
2469 dev->horkage |= ata_dev_blacklisted(dev);
2470 ata_force_horkage(dev);
2472 if (dev->horkage & ATA_HORKAGE_DISABLE) {
2473 ata_dev_info(dev, "unsupported device, disabling\n");
2474 ata_dev_disable(dev);
2478 if ((!atapi_enabled || (ap->flags & ATA_FLAG_NO_ATAPI)) &&
2479 dev->class == ATA_DEV_ATAPI) {
2480 ata_dev_warn(dev, "WARNING: ATAPI is %s, device ignored\n",
2481 atapi_enabled ? "not supported with this driver"
2483 ata_dev_disable(dev);
2487 rc = ata_do_link_spd_horkage(dev);
2491 /* some WD SATA-1 drives have issues with LPM, turn on NOLPM for them */
2492 if ((dev->horkage & ATA_HORKAGE_WD_BROKEN_LPM) &&
2493 (id[ATA_ID_SATA_CAPABILITY] & 0xe) == 0x2)
2494 dev->horkage |= ATA_HORKAGE_NOLPM;
2496 if (dev->horkage & ATA_HORKAGE_NOLPM) {
2497 ata_dev_warn(dev, "LPM support broken, forcing max_power\n");
2498 dev->link->ap->target_lpm_policy = ATA_LPM_MAX_POWER;
2501 /* let ACPI work its magic */
2502 rc = ata_acpi_on_devcfg(dev);
2506 /* massage HPA, do it early as it might change IDENTIFY data */
2507 rc = ata_hpa_resize(dev);
2511 /* print device capabilities */
2512 if (ata_msg_probe(ap))
2514 "%s: cfg 49:%04x 82:%04x 83:%04x 84:%04x "
2515 "85:%04x 86:%04x 87:%04x 88:%04x\n",
2517 id[49], id[82], id[83], id[84],
2518 id[85], id[86], id[87], id[88]);
2520 /* initialize to-be-configured parameters */
2521 dev->flags &= ~ATA_DFLAG_CFG_MASK;
2522 dev->max_sectors = 0;
2528 dev->multi_count = 0;
2531 * common ATA, ATAPI feature tests
2534 /* find max transfer mode; for printk only */
2535 xfer_mask = ata_id_xfermask(id);
2537 if (ata_msg_probe(ap))
2540 /* SCSI only uses 4-char revisions, dump full 8 chars from ATA */
2541 ata_id_c_string(dev->id, fwrevbuf, ATA_ID_FW_REV,
2544 ata_id_c_string(dev->id, modelbuf, ATA_ID_PROD,
2547 /* ATA-specific feature tests */
2548 if (dev->class == ATA_DEV_ATA || dev->class == ATA_DEV_ZAC) {
2549 if (ata_id_is_cfa(id)) {
2550 /* CPRM may make this media unusable */
2551 if (id[ATA_ID_CFA_KEY_MGMT] & 1)
2553 "supports DRM functions and may not be fully accessible\n");
2554 snprintf(revbuf, 7, "CFA");
2556 snprintf(revbuf, 7, "ATA-%d", ata_id_major_version(id));
2557 /* Warn the user if the device has TPM extensions */
2558 if (ata_id_has_tpm(id))
2560 "supports DRM functions and may not be fully accessible\n");
2563 dev->n_sectors = ata_id_n_sectors(id);
2565 /* get current R/W Multiple count setting */
2566 if ((dev->id[47] >> 8) == 0x80 && (dev->id[59] & 0x100)) {
2567 unsigned int max = dev->id[47] & 0xff;
2568 unsigned int cnt = dev->id[59] & 0xff;
2569 /* only recognize/allow powers of two here */
2570 if (is_power_of_2(max) && is_power_of_2(cnt))
2572 dev->multi_count = cnt;
2575 if (ata_id_has_lba(id)) {
2576 const char *lba_desc;
2580 dev->flags |= ATA_DFLAG_LBA;
2581 if (ata_id_has_lba48(id)) {
2582 dev->flags |= ATA_DFLAG_LBA48;
2585 if (dev->n_sectors >= (1UL << 28) &&
2586 ata_id_has_flush_ext(id))
2587 dev->flags |= ATA_DFLAG_FLUSH_EXT;
2591 rc = ata_dev_config_ncq(dev, ncq_desc, sizeof(ncq_desc));
2595 /* print device info to dmesg */
2596 if (ata_msg_drv(ap) && print_info) {
2597 ata_dev_info(dev, "%s: %s, %s, max %s\n",
2598 revbuf, modelbuf, fwrevbuf,
2599 ata_mode_string(xfer_mask));
2601 "%llu sectors, multi %u: %s %s\n",
2602 (unsigned long long)dev->n_sectors,
2603 dev->multi_count, lba_desc, ncq_desc);
2608 /* Default translation */
2609 dev->cylinders = id[1];
2611 dev->sectors = id[6];
2613 if (ata_id_current_chs_valid(id)) {
2614 /* Current CHS translation is valid. */
2615 dev->cylinders = id[54];
2616 dev->heads = id[55];
2617 dev->sectors = id[56];
2620 /* print device info to dmesg */
2621 if (ata_msg_drv(ap) && print_info) {
2622 ata_dev_info(dev, "%s: %s, %s, max %s\n",
2623 revbuf, modelbuf, fwrevbuf,
2624 ata_mode_string(xfer_mask));
2626 "%llu sectors, multi %u, CHS %u/%u/%u\n",
2627 (unsigned long long)dev->n_sectors,
2628 dev->multi_count, dev->cylinders,
2629 dev->heads, dev->sectors);
2633 /* Check and mark DevSlp capability. Get DevSlp timing variables
2634 * from SATA Settings page of Identify Device Data Log.
2636 if (ata_id_has_devslp(dev->id)) {
2637 u8 *sata_setting = ap->sector_buf;
2640 dev->flags |= ATA_DFLAG_DEVSLP;
2641 err_mask = ata_read_log_page(dev,
2642 ATA_LOG_IDENTIFY_DEVICE,
2643 ATA_LOG_SATA_SETTINGS,
2648 "failed to get Identify Device Data, Emask 0x%x\n",
2651 for (i = 0; i < ATA_LOG_DEVSLP_SIZE; i++) {
2652 j = ATA_LOG_DEVSLP_OFFSET + i;
2653 dev->devslp_timing[i] = sata_setting[j];
2656 ata_dev_config_sense_reporting(dev);
2657 ata_dev_config_zac(dev);
2658 ata_dev_config_trusted(dev);
2662 /* ATAPI-specific feature tests */
2663 else if (dev->class == ATA_DEV_ATAPI) {
2664 const char *cdb_intr_string = "";
2665 const char *atapi_an_string = "";
2666 const char *dma_dir_string = "";
2669 rc = atapi_cdb_len(id);
2670 if ((rc < 12) || (rc > ATAPI_CDB_LEN)) {
2671 if (ata_msg_warn(ap))
2672 ata_dev_warn(dev, "unsupported CDB len\n");
2676 dev->cdb_len = (unsigned int) rc;
2678 /* Enable ATAPI AN if both the host and device have
2679 * the support. If PMP is attached, SNTF is required
2680 * to enable ATAPI AN to discern between PHY status
2681 * changed notifications and ATAPI ANs.
2684 (ap->flags & ATA_FLAG_AN) && ata_id_has_atapi_AN(id) &&
2685 (!sata_pmp_attached(ap) ||
2686 sata_scr_read(&ap->link, SCR_NOTIFICATION, &sntf) == 0)) {
2687 /* issue SET feature command to turn this on */
2688 err_mask = ata_dev_set_feature(dev,
2689 SETFEATURES_SATA_ENABLE, SATA_AN);
2692 "failed to enable ATAPI AN (err_mask=0x%x)\n",
2695 dev->flags |= ATA_DFLAG_AN;
2696 atapi_an_string = ", ATAPI AN";
2700 if (ata_id_cdb_intr(dev->id)) {
2701 dev->flags |= ATA_DFLAG_CDB_INTR;
2702 cdb_intr_string = ", CDB intr";
2705 if (atapi_dmadir || (dev->horkage & ATA_HORKAGE_ATAPI_DMADIR) || atapi_id_dmadir(dev->id)) {
2706 dev->flags |= ATA_DFLAG_DMADIR;
2707 dma_dir_string = ", DMADIR";
2710 if (ata_id_has_da(dev->id)) {
2711 dev->flags |= ATA_DFLAG_DA;
2715 /* print device info to dmesg */
2716 if (ata_msg_drv(ap) && print_info)
2718 "ATAPI: %s, %s, max %s%s%s%s\n",
2720 ata_mode_string(xfer_mask),
2721 cdb_intr_string, atapi_an_string,
2725 /* determine max_sectors */
2726 dev->max_sectors = ATA_MAX_SECTORS;
2727 if (dev->flags & ATA_DFLAG_LBA48)
2728 dev->max_sectors = ATA_MAX_SECTORS_LBA48;
2730 /* Limit PATA drive on SATA cable bridge transfers to udma5,
2732 if (ata_dev_knobble(dev)) {
2733 if (ata_msg_drv(ap) && print_info)
2734 ata_dev_info(dev, "applying bridge limits\n");
2735 dev->udma_mask &= ATA_UDMA5;
2736 dev->max_sectors = ATA_MAX_SECTORS;
2739 if ((dev->class == ATA_DEV_ATAPI) &&
2740 (atapi_command_packet_set(id) == TYPE_TAPE)) {
2741 dev->max_sectors = ATA_MAX_SECTORS_TAPE;
2742 dev->horkage |= ATA_HORKAGE_STUCK_ERR;
2745 if (dev->horkage & ATA_HORKAGE_MAX_SEC_128)
2746 dev->max_sectors = min_t(unsigned int, ATA_MAX_SECTORS_128,
2749 if (dev->horkage & ATA_HORKAGE_MAX_SEC_1024)
2750 dev->max_sectors = min_t(unsigned int, ATA_MAX_SECTORS_1024,
2753 if (dev->horkage & ATA_HORKAGE_MAX_SEC_LBA48)
2754 dev->max_sectors = ATA_MAX_SECTORS_LBA48;
2756 if (ap->ops->dev_config)
2757 ap->ops->dev_config(dev);
2759 if (dev->horkage & ATA_HORKAGE_DIAGNOSTIC) {
2760 /* Let the user know. We don't want to disallow opens for
2761 rescue purposes, or in case the vendor is just a blithering
2762 idiot. Do this after the dev_config call as some controllers
2763 with buggy firmware may want to avoid reporting false device
2768 "Drive reports diagnostics failure. This may indicate a drive\n");
2770 "fault or invalid emulation. Contact drive vendor for information.\n");
2774 if ((dev->horkage & ATA_HORKAGE_FIRMWARE_WARN) && print_info) {
2775 ata_dev_warn(dev, "WARNING: device requires firmware update to be fully functional\n");
2776 ata_dev_warn(dev, " contact the vendor or visit http://ata.wiki.kernel.org\n");
2782 if (ata_msg_probe(ap))
2783 ata_dev_dbg(dev, "%s: EXIT, err\n", __func__);
2788 * ata_cable_40wire - return 40 wire cable type
2791 * Helper method for drivers which want to hardwire 40 wire cable
2795 int ata_cable_40wire(struct ata_port *ap)
2797 return ATA_CBL_PATA40;
2801 * ata_cable_80wire - return 80 wire cable type
2804 * Helper method for drivers which want to hardwire 80 wire cable
2808 int ata_cable_80wire(struct ata_port *ap)
2810 return ATA_CBL_PATA80;
2814 * ata_cable_unknown - return unknown PATA cable.
2817 * Helper method for drivers which have no PATA cable detection.
2820 int ata_cable_unknown(struct ata_port *ap)
2822 return ATA_CBL_PATA_UNK;
2826 * ata_cable_ignore - return ignored PATA cable.
2829 * Helper method for drivers which don't use cable type to limit
2832 int ata_cable_ignore(struct ata_port *ap)
2834 return ATA_CBL_PATA_IGN;
2838 * ata_cable_sata - return SATA cable type
2841 * Helper method for drivers which have SATA cables
2844 int ata_cable_sata(struct ata_port *ap)
2846 return ATA_CBL_SATA;
2850 * ata_bus_probe - Reset and probe ATA bus
2853 * Master ATA bus probing function. Initiates a hardware-dependent
2854 * bus reset, then attempts to identify any devices found on
2858 * PCI/etc. bus probe sem.
2861 * Zero on success, negative errno otherwise.
2864 int ata_bus_probe(struct ata_port *ap)
2866 unsigned int classes[ATA_MAX_DEVICES];
2867 int tries[ATA_MAX_DEVICES];
2869 struct ata_device *dev;
2871 ata_for_each_dev(dev, &ap->link, ALL)
2872 tries[dev->devno] = ATA_PROBE_MAX_TRIES;
2875 ata_for_each_dev(dev, &ap->link, ALL) {
2876 /* If we issue an SRST then an ATA drive (not ATAPI)
2877 * may change configuration and be in PIO0 timing. If
2878 * we do a hard reset (or are coming from power on)
2879 * this is true for ATA or ATAPI. Until we've set a
2880 * suitable controller mode we should not touch the
2881 * bus as we may be talking too fast.
2883 dev->pio_mode = XFER_PIO_0;
2884 dev->dma_mode = 0xff;
2886 /* If the controller has a pio mode setup function
2887 * then use it to set the chipset to rights. Don't
2888 * touch the DMA setup as that will be dealt with when
2889 * configuring devices.
2891 if (ap->ops->set_piomode)
2892 ap->ops->set_piomode(ap, dev);
2895 /* reset and determine device classes */
2896 ap->ops->phy_reset(ap);
2898 ata_for_each_dev(dev, &ap->link, ALL) {
2899 if (dev->class != ATA_DEV_UNKNOWN)
2900 classes[dev->devno] = dev->class;
2902 classes[dev->devno] = ATA_DEV_NONE;
2904 dev->class = ATA_DEV_UNKNOWN;
2907 /* read IDENTIFY page and configure devices. We have to do the identify
2908 specific sequence bass-ackwards so that PDIAG- is released by
2911 ata_for_each_dev(dev, &ap->link, ALL_REVERSE) {
2912 if (tries[dev->devno])
2913 dev->class = classes[dev->devno];
2915 if (!ata_dev_enabled(dev))
2918 rc = ata_dev_read_id(dev, &dev->class, ATA_READID_POSTRESET,
2924 /* Now ask for the cable type as PDIAG- should have been released */
2925 if (ap->ops->cable_detect)
2926 ap->cbl = ap->ops->cable_detect(ap);
2928 /* We may have SATA bridge glue hiding here irrespective of
2929 * the reported cable types and sensed types. When SATA
2930 * drives indicate we have a bridge, we don't know which end
2931 * of the link the bridge is which is a problem.
2933 ata_for_each_dev(dev, &ap->link, ENABLED)
2934 if (ata_id_is_sata(dev->id))
2935 ap->cbl = ATA_CBL_SATA;
2937 /* After the identify sequence we can now set up the devices. We do
2938 this in the normal order so that the user doesn't get confused */
2940 ata_for_each_dev(dev, &ap->link, ENABLED) {
2941 ap->link.eh_context.i.flags |= ATA_EHI_PRINTINFO;
2942 rc = ata_dev_configure(dev);
2943 ap->link.eh_context.i.flags &= ~ATA_EHI_PRINTINFO;
2948 /* configure transfer mode */
2949 rc = ata_set_mode(&ap->link, &dev);
2953 ata_for_each_dev(dev, &ap->link, ENABLED)
2959 tries[dev->devno]--;
2963 /* eeek, something went very wrong, give up */
2964 tries[dev->devno] = 0;
2968 /* give it just one more chance */
2969 tries[dev->devno] = min(tries[dev->devno], 1);
2972 if (tries[dev->devno] == 1) {
2973 /* This is the last chance, better to slow
2974 * down than lose it.
2976 sata_down_spd_limit(&ap->link, 0);
2977 ata_down_xfermask_limit(dev, ATA_DNXFER_PIO);
2981 if (!tries[dev->devno])
2982 ata_dev_disable(dev);
2988 * sata_print_link_status - Print SATA link status
2989 * @link: SATA link to printk link status about
2991 * This function prints link speed and status of a SATA link.
2996 static void sata_print_link_status(struct ata_link *link)
2998 u32 sstatus, scontrol, tmp;
3000 if (sata_scr_read(link, SCR_STATUS, &sstatus))
3002 sata_scr_read(link, SCR_CONTROL, &scontrol);
3004 if (ata_phys_link_online(link)) {
3005 tmp = (sstatus >> 4) & 0xf;
3006 ata_link_info(link, "SATA link up %s (SStatus %X SControl %X)\n",
3007 sata_spd_string(tmp), sstatus, scontrol);
3009 ata_link_info(link, "SATA link down (SStatus %X SControl %X)\n",
3015 * ata_dev_pair - return other device on cable
3018 * Obtain the other device on the same cable, or if none is
3019 * present NULL is returned
3022 struct ata_device *ata_dev_pair(struct ata_device *adev)
3024 struct ata_link *link = adev->link;
3025 struct ata_device *pair = &link->device[1 - adev->devno];
3026 if (!ata_dev_enabled(pair))
3032 * sata_down_spd_limit - adjust SATA spd limit downward
3033 * @link: Link to adjust SATA spd limit for
3034 * @spd_limit: Additional limit
3036 * Adjust SATA spd limit of @link downward. Note that this
3037 * function only adjusts the limit. The change must be applied
3038 * using sata_set_spd().
3040 * If @spd_limit is non-zero, the speed is limited to equal to or
3041 * lower than @spd_limit if such speed is supported. If
3042 * @spd_limit is slower than any supported speed, only the lowest
3043 * supported speed is allowed.
3046 * Inherited from caller.
3049 * 0 on success, negative errno on failure
3051 int sata_down_spd_limit(struct ata_link *link, u32 spd_limit)
3053 u32 sstatus, spd, mask;
3056 if (!sata_scr_valid(link))
3059 /* If SCR can be read, use it to determine the current SPD.
3060 * If not, use cached value in link->sata_spd.
3062 rc = sata_scr_read(link, SCR_STATUS, &sstatus);
3063 if (rc == 0 && ata_sstatus_online(sstatus))
3064 spd = (sstatus >> 4) & 0xf;
3066 spd = link->sata_spd;
3068 mask = link->sata_spd_limit;
3072 /* unconditionally mask off the highest bit */
3073 bit = fls(mask) - 1;
3074 mask &= ~(1 << bit);
3077 * Mask off all speeds higher than or equal to the current one. At
3078 * this point, if current SPD is not available and we previously
3079 * recorded the link speed from SStatus, the driver has already
3080 * masked off the highest bit so mask should already be 1 or 0.
3081 * Otherwise, we should not force 1.5Gbps on a link where we have
3082 * not previously recorded speed from SStatus. Just return in this
3086 mask &= (1 << (spd - 1)) - 1;
3090 /* were we already at the bottom? */
3095 if (mask & ((1 << spd_limit) - 1))
3096 mask &= (1 << spd_limit) - 1;
3098 bit = ffs(mask) - 1;
3103 link->sata_spd_limit = mask;
3105 ata_link_warn(link, "limiting SATA link speed to %s\n",
3106 sata_spd_string(fls(mask)));
3111 static int __sata_set_spd_needed(struct ata_link *link, u32 *scontrol)
3113 struct ata_link *host_link = &link->ap->link;
3114 u32 limit, target, spd;
3116 limit = link->sata_spd_limit;
3118 /* Don't configure downstream link faster than upstream link.
3119 * It doesn't speed up anything and some PMPs choke on such
3122 if (!ata_is_host_link(link) && host_link->sata_spd)
3123 limit &= (1 << host_link->sata_spd) - 1;
3125 if (limit == UINT_MAX)
3128 target = fls(limit);
3130 spd = (*scontrol >> 4) & 0xf;
3131 *scontrol = (*scontrol & ~0xf0) | ((target & 0xf) << 4);
3133 return spd != target;
3137 * sata_set_spd_needed - is SATA spd configuration needed
3138 * @link: Link in question
3140 * Test whether the spd limit in SControl matches
3141 * @link->sata_spd_limit. This function is used to determine
3142 * whether hardreset is necessary to apply SATA spd
3146 * Inherited from caller.
3149 * 1 if SATA spd configuration is needed, 0 otherwise.
3151 static int sata_set_spd_needed(struct ata_link *link)
3155 if (sata_scr_read(link, SCR_CONTROL, &scontrol))
3158 return __sata_set_spd_needed(link, &scontrol);
3162 * sata_set_spd - set SATA spd according to spd limit
3163 * @link: Link to set SATA spd for
3165 * Set SATA spd of @link according to sata_spd_limit.
3168 * Inherited from caller.
3171 * 0 if spd doesn't need to be changed, 1 if spd has been
3172 * changed. Negative errno if SCR registers are inaccessible.
3174 int sata_set_spd(struct ata_link *link)
3179 if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
3182 if (!__sata_set_spd_needed(link, &scontrol))
3185 if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol)))
3192 * This mode timing computation functionality is ported over from
3193 * drivers/ide/ide-timing.h and was originally written by Vojtech Pavlik
3196 * PIO 0-4, MWDMA 0-2 and UDMA 0-6 timings (in nanoseconds).
3197 * These were taken from ATA/ATAPI-6 standard, rev 0a, except
3198 * for UDMA6, which is currently supported only by Maxtor drives.
3200 * For PIO 5/6 MWDMA 3/4 see the CFA specification 3.0.
3203 static const struct ata_timing ata_timing[] = {
3204 /* { XFER_PIO_SLOW, 120, 290, 240, 960, 290, 240, 0, 960, 0 }, */
3205 { XFER_PIO_0, 70, 290, 240, 600, 165, 150, 0, 600, 0 },
3206 { XFER_PIO_1, 50, 290, 93, 383, 125, 100, 0, 383, 0 },
3207 { XFER_PIO_2, 30, 290, 40, 330, 100, 90, 0, 240, 0 },
3208 { XFER_PIO_3, 30, 80, 70, 180, 80, 70, 0, 180, 0 },
3209 { XFER_PIO_4, 25, 70, 25, 120, 70, 25, 0, 120, 0 },
3210 { XFER_PIO_5, 15, 65, 25, 100, 65, 25, 0, 100, 0 },
3211 { XFER_PIO_6, 10, 55, 20, 80, 55, 20, 0, 80, 0 },
3213 { XFER_SW_DMA_0, 120, 0, 0, 0, 480, 480, 50, 960, 0 },
3214 { XFER_SW_DMA_1, 90, 0, 0, 0, 240, 240, 30, 480, 0 },
3215 { XFER_SW_DMA_2, 60, 0, 0, 0, 120, 120, 20, 240, 0 },
3217 { XFER_MW_DMA_0, 60, 0, 0, 0, 215, 215, 20, 480, 0 },
3218 { XFER_MW_DMA_1, 45, 0, 0, 0, 80, 50, 5, 150, 0 },
3219 { XFER_MW_DMA_2, 25, 0, 0, 0, 70, 25, 5, 120, 0 },
3220 { XFER_MW_DMA_3, 25, 0, 0, 0, 65, 25, 5, 100, 0 },
3221 { XFER_MW_DMA_4, 25, 0, 0, 0, 55, 20, 5, 80, 0 },
3223 /* { XFER_UDMA_SLOW, 0, 0, 0, 0, 0, 0, 0, 0, 150 }, */
3224 { XFER_UDMA_0, 0, 0, 0, 0, 0, 0, 0, 0, 120 },
3225 { XFER_UDMA_1, 0, 0, 0, 0, 0, 0, 0, 0, 80 },
3226 { XFER_UDMA_2, 0, 0, 0, 0, 0, 0, 0, 0, 60 },
3227 { XFER_UDMA_3, 0, 0, 0, 0, 0, 0, 0, 0, 45 },
3228 { XFER_UDMA_4, 0, 0, 0, 0, 0, 0, 0, 0, 30 },
3229 { XFER_UDMA_5, 0, 0, 0, 0, 0, 0, 0, 0, 20 },
3230 { XFER_UDMA_6, 0, 0, 0, 0, 0, 0, 0, 0, 15 },
3235 #define ENOUGH(v, unit) (((v)-1)/(unit)+1)
3236 #define EZ(v, unit) ((v)?ENOUGH(((v) * 1000), unit):0)
3238 static void ata_timing_quantize(const struct ata_timing *t, struct ata_timing *q, int T, int UT)
3240 q->setup = EZ(t->setup, T);
3241 q->act8b = EZ(t->act8b, T);
3242 q->rec8b = EZ(t->rec8b, T);
3243 q->cyc8b = EZ(t->cyc8b, T);
3244 q->active = EZ(t->active, T);
3245 q->recover = EZ(t->recover, T);
3246 q->dmack_hold = EZ(t->dmack_hold, T);
3247 q->cycle = EZ(t->cycle, T);
3248 q->udma = EZ(t->udma, UT);
3251 void ata_timing_merge(const struct ata_timing *a, const struct ata_timing *b,
3252 struct ata_timing *m, unsigned int what)
3254 if (what & ATA_TIMING_SETUP ) m->setup = max(a->setup, b->setup);
3255 if (what & ATA_TIMING_ACT8B ) m->act8b = max(a->act8b, b->act8b);
3256 if (what & ATA_TIMING_REC8B ) m->rec8b = max(a->rec8b, b->rec8b);
3257 if (what & ATA_TIMING_CYC8B ) m->cyc8b = max(a->cyc8b, b->cyc8b);
3258 if (what & ATA_TIMING_ACTIVE ) m->active = max(a->active, b->active);
3259 if (what & ATA_TIMING_RECOVER) m->recover = max(a->recover, b->recover);
3260 if (what & ATA_TIMING_DMACK_HOLD) m->dmack_hold = max(a->dmack_hold, b->dmack_hold);
3261 if (what & ATA_TIMING_CYCLE ) m->cycle = max(a->cycle, b->cycle);
3262 if (what & ATA_TIMING_UDMA ) m->udma = max(a->udma, b->udma);
3265 const struct ata_timing *ata_timing_find_mode(u8 xfer_mode)
3267 const struct ata_timing *t = ata_timing;
3269 while (xfer_mode > t->mode)
3272 if (xfer_mode == t->mode)
3275 WARN_ONCE(true, "%s: unable to find timing for xfer_mode 0x%x\n",
3276 __func__, xfer_mode);
3281 int ata_timing_compute(struct ata_device *adev, unsigned short speed,
3282 struct ata_timing *t, int T, int UT)
3284 const u16 *id = adev->id;
3285 const struct ata_timing *s;
3286 struct ata_timing p;
3292 if (!(s = ata_timing_find_mode(speed)))
3295 memcpy(t, s, sizeof(*s));
3298 * If the drive is an EIDE drive, it can tell us it needs extended
3299 * PIO/MW_DMA cycle timing.
3302 if (id[ATA_ID_FIELD_VALID] & 2) { /* EIDE drive */
3303 memset(&p, 0, sizeof(p));
3305 if (speed >= XFER_PIO_0 && speed < XFER_SW_DMA_0) {
3306 if (speed <= XFER_PIO_2)
3307 p.cycle = p.cyc8b = id[ATA_ID_EIDE_PIO];
3308 else if ((speed <= XFER_PIO_4) ||
3309 (speed == XFER_PIO_5 && !ata_id_is_cfa(id)))
3310 p.cycle = p.cyc8b = id[ATA_ID_EIDE_PIO_IORDY];
3311 } else if (speed >= XFER_MW_DMA_0 && speed <= XFER_MW_DMA_2)
3312 p.cycle = id[ATA_ID_EIDE_DMA_MIN];
3314 ata_timing_merge(&p, t, t, ATA_TIMING_CYCLE | ATA_TIMING_CYC8B);
3318 * Convert the timing to bus clock counts.
3321 ata_timing_quantize(t, t, T, UT);
3324 * Even in DMA/UDMA modes we still use PIO access for IDENTIFY,
3325 * S.M.A.R.T * and some other commands. We have to ensure that the
3326 * DMA cycle timing is slower/equal than the fastest PIO timing.
3329 if (speed > XFER_PIO_6) {
3330 ata_timing_compute(adev, adev->pio_mode, &p, T, UT);
3331 ata_timing_merge(&p, t, t, ATA_TIMING_ALL);
3335 * Lengthen active & recovery time so that cycle time is correct.
3338 if (t->act8b + t->rec8b < t->cyc8b) {
3339 t->act8b += (t->cyc8b - (t->act8b + t->rec8b)) / 2;
3340 t->rec8b = t->cyc8b - t->act8b;
3343 if (t->active + t->recover < t->cycle) {
3344 t->active += (t->cycle - (t->active + t->recover)) / 2;
3345 t->recover = t->cycle - t->active;
3348 /* In a few cases quantisation may produce enough errors to
3349 leave t->cycle too low for the sum of active and recovery
3350 if so we must correct this */
3351 if (t->active + t->recover > t->cycle)
3352 t->cycle = t->active + t->recover;
3358 * ata_timing_cycle2mode - find xfer mode for the specified cycle duration
3359 * @xfer_shift: ATA_SHIFT_* value for transfer type to examine.
3360 * @cycle: cycle duration in ns
3362 * Return matching xfer mode for @cycle. The returned mode is of
3363 * the transfer type specified by @xfer_shift. If @cycle is too
3364 * slow for @xfer_shift, 0xff is returned. If @cycle is faster
3365 * than the fastest known mode, the fasted mode is returned.
3371 * Matching xfer_mode, 0xff if no match found.
3373 u8 ata_timing_cycle2mode(unsigned int xfer_shift, int cycle)
3375 u8 base_mode = 0xff, last_mode = 0xff;
3376 const struct ata_xfer_ent *ent;
3377 const struct ata_timing *t;
3379 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
3380 if (ent->shift == xfer_shift)
3381 base_mode = ent->base;
3383 for (t = ata_timing_find_mode(base_mode);
3384 t && ata_xfer_mode2shift(t->mode) == xfer_shift; t++) {
3385 unsigned short this_cycle;
3387 switch (xfer_shift) {
3389 case ATA_SHIFT_MWDMA:
3390 this_cycle = t->cycle;
3392 case ATA_SHIFT_UDMA:
3393 this_cycle = t->udma;
3399 if (cycle > this_cycle)
3402 last_mode = t->mode;
3409 * ata_down_xfermask_limit - adjust dev xfer masks downward
3410 * @dev: Device to adjust xfer masks
3411 * @sel: ATA_DNXFER_* selector
3413 * Adjust xfer masks of @dev downward. Note that this function
3414 * does not apply the change. Invoking ata_set_mode() afterwards
3415 * will apply the limit.
3418 * Inherited from caller.
3421 * 0 on success, negative errno on failure
3423 int ata_down_xfermask_limit(struct ata_device *dev, unsigned int sel)
3426 unsigned long orig_mask, xfer_mask;
3427 unsigned long pio_mask, mwdma_mask, udma_mask;
3430 quiet = !!(sel & ATA_DNXFER_QUIET);
3431 sel &= ~ATA_DNXFER_QUIET;
3433 xfer_mask = orig_mask = ata_pack_xfermask(dev->pio_mask,
3436 ata_unpack_xfermask(xfer_mask, &pio_mask, &mwdma_mask, &udma_mask);
3439 case ATA_DNXFER_PIO:
3440 highbit = fls(pio_mask) - 1;
3441 pio_mask &= ~(1 << highbit);
3444 case ATA_DNXFER_DMA:
3446 highbit = fls(udma_mask) - 1;
3447 udma_mask &= ~(1 << highbit);
3450 } else if (mwdma_mask) {
3451 highbit = fls(mwdma_mask) - 1;
3452 mwdma_mask &= ~(1 << highbit);
3458 case ATA_DNXFER_40C:
3459 udma_mask &= ATA_UDMA_MASK_40C;
3462 case ATA_DNXFER_FORCE_PIO0:
3465 case ATA_DNXFER_FORCE_PIO:
3474 xfer_mask &= ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask);
3476 if (!(xfer_mask & ATA_MASK_PIO) || xfer_mask == orig_mask)
3480 if (xfer_mask & (ATA_MASK_MWDMA | ATA_MASK_UDMA))
3481 snprintf(buf, sizeof(buf), "%s:%s",
3482 ata_mode_string(xfer_mask),
3483 ata_mode_string(xfer_mask & ATA_MASK_PIO));
3485 snprintf(buf, sizeof(buf), "%s",
3486 ata_mode_string(xfer_mask));
3488 ata_dev_warn(dev, "limiting speed to %s\n", buf);
3491 ata_unpack_xfermask(xfer_mask, &dev->pio_mask, &dev->mwdma_mask,
3497 static int ata_dev_set_mode(struct ata_device *dev)
3499 struct ata_port *ap = dev->link->ap;
3500 struct ata_eh_context *ehc = &dev->link->eh_context;
3501 const bool nosetxfer = dev->horkage & ATA_HORKAGE_NOSETXFER;
3502 const char *dev_err_whine = "";
3503 int ign_dev_err = 0;
3504 unsigned int err_mask = 0;
3507 dev->flags &= ~ATA_DFLAG_PIO;
3508 if (dev->xfer_shift == ATA_SHIFT_PIO)
3509 dev->flags |= ATA_DFLAG_PIO;
3511 if (nosetxfer && ap->flags & ATA_FLAG_SATA && ata_id_is_sata(dev->id))
3512 dev_err_whine = " (SET_XFERMODE skipped)";
3516 "NOSETXFER but PATA detected - can't "
3517 "skip SETXFER, might malfunction\n");
3518 err_mask = ata_dev_set_xfermode(dev);
3521 if (err_mask & ~AC_ERR_DEV)
3525 ehc->i.flags |= ATA_EHI_POST_SETMODE;
3526 rc = ata_dev_revalidate(dev, ATA_DEV_UNKNOWN, 0);
3527 ehc->i.flags &= ~ATA_EHI_POST_SETMODE;
3531 if (dev->xfer_shift == ATA_SHIFT_PIO) {
3532 /* Old CFA may refuse this command, which is just fine */
3533 if (ata_id_is_cfa(dev->id))
3535 /* Catch several broken garbage emulations plus some pre
3537 if (ata_id_major_version(dev->id) == 0 &&
3538 dev->pio_mode <= XFER_PIO_2)
3540 /* Some very old devices and some bad newer ones fail
3541 any kind of SET_XFERMODE request but support PIO0-2
3542 timings and no IORDY */
3543 if (!ata_id_has_iordy(dev->id) && dev->pio_mode <= XFER_PIO_2)
3546 /* Early MWDMA devices do DMA but don't allow DMA mode setting.
3547 Don't fail an MWDMA0 set IFF the device indicates it is in MWDMA0 */
3548 if (dev->xfer_shift == ATA_SHIFT_MWDMA &&
3549 dev->dma_mode == XFER_MW_DMA_0 &&
3550 (dev->id[63] >> 8) & 1)
3553 /* if the device is actually configured correctly, ignore dev err */
3554 if (dev->xfer_mode == ata_xfer_mask2mode(ata_id_xfermask(dev->id)))
3557 if (err_mask & AC_ERR_DEV) {
3561 dev_err_whine = " (device error ignored)";
3564 DPRINTK("xfer_shift=%u, xfer_mode=0x%x\n",
3565 dev->xfer_shift, (int)dev->xfer_mode);
3567 if (!(ehc->i.flags & ATA_EHI_QUIET) ||
3568 ehc->i.flags & ATA_EHI_DID_HARDRESET)
3569 ata_dev_info(dev, "configured for %s%s\n",
3570 ata_mode_string(ata_xfer_mode2mask(dev->xfer_mode)),
3576 ata_dev_err(dev, "failed to set xfermode (err_mask=0x%x)\n", err_mask);
3581 * ata_do_set_mode - Program timings and issue SET FEATURES - XFER
3582 * @link: link on which timings will be programmed
3583 * @r_failed_dev: out parameter for failed device
3585 * Standard implementation of the function used to tune and set
3586 * ATA device disk transfer mode (PIO3, UDMA6, etc.). If
3587 * ata_dev_set_mode() fails, pointer to the failing device is
3588 * returned in @r_failed_dev.
3591 * PCI/etc. bus probe sem.
3594 * 0 on success, negative errno otherwise
3597 int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev)
3599 struct ata_port *ap = link->ap;
3600 struct ata_device *dev;
3601 int rc = 0, used_dma = 0, found = 0;
3603 /* step 1: calculate xfer_mask */
3604 ata_for_each_dev(dev, link, ENABLED) {
3605 unsigned long pio_mask, dma_mask;
3606 unsigned int mode_mask;
3608 mode_mask = ATA_DMA_MASK_ATA;
3609 if (dev->class == ATA_DEV_ATAPI)
3610 mode_mask = ATA_DMA_MASK_ATAPI;
3611 else if (ata_id_is_cfa(dev->id))
3612 mode_mask = ATA_DMA_MASK_CFA;
3614 ata_dev_xfermask(dev);
3615 ata_force_xfermask(dev);
3617 pio_mask = ata_pack_xfermask(dev->pio_mask, 0, 0);
3619 if (libata_dma_mask & mode_mask)
3620 dma_mask = ata_pack_xfermask(0, dev->mwdma_mask,
3625 dev->pio_mode = ata_xfer_mask2mode(pio_mask);
3626 dev->dma_mode = ata_xfer_mask2mode(dma_mask);
3629 if (ata_dma_enabled(dev))
3635 /* step 2: always set host PIO timings */
3636 ata_for_each_dev(dev, link, ENABLED) {
3637 if (dev->pio_mode == 0xff) {
3638 ata_dev_warn(dev, "no PIO support\n");
3643 dev->xfer_mode = dev->pio_mode;
3644 dev->xfer_shift = ATA_SHIFT_PIO;
3645 if (ap->ops->set_piomode)
3646 ap->ops->set_piomode(ap, dev);
3649 /* step 3: set host DMA timings */
3650 ata_for_each_dev(dev, link, ENABLED) {
3651 if (!ata_dma_enabled(dev))
3654 dev->xfer_mode = dev->dma_mode;
3655 dev->xfer_shift = ata_xfer_mode2shift(dev->dma_mode);
3656 if (ap->ops->set_dmamode)
3657 ap->ops->set_dmamode(ap, dev);
3660 /* step 4: update devices' xfer mode */
3661 ata_for_each_dev(dev, link, ENABLED) {
3662 rc = ata_dev_set_mode(dev);
3667 /* Record simplex status. If we selected DMA then the other
3668 * host channels are not permitted to do so.
3670 if (used_dma && (ap->host->flags & ATA_HOST_SIMPLEX))
3671 ap->host->simplex_claimed = ap;
3675 *r_failed_dev = dev;
3680 * ata_wait_ready - wait for link to become ready
3681 * @link: link to be waited on
3682 * @deadline: deadline jiffies for the operation
3683 * @check_ready: callback to check link readiness
3685 * Wait for @link to become ready. @check_ready should return
3686 * positive number if @link is ready, 0 if it isn't, -ENODEV if
3687 * link doesn't seem to be occupied, other errno for other error
3690 * Transient -ENODEV conditions are allowed for
3691 * ATA_TMOUT_FF_WAIT.
3697 * 0 if @link is ready before @deadline; otherwise, -errno.
3699 int ata_wait_ready(struct ata_link *link, unsigned long deadline,
3700 int (*check_ready)(struct ata_link *link))
3702 unsigned long start = jiffies;
3703 unsigned long nodev_deadline;
3706 /* choose which 0xff timeout to use, read comment in libata.h */
3707 if (link->ap->host->flags & ATA_HOST_PARALLEL_SCAN)
3708 nodev_deadline = ata_deadline(start, ATA_TMOUT_FF_WAIT_LONG);
3710 nodev_deadline = ata_deadline(start, ATA_TMOUT_FF_WAIT);
3712 /* Slave readiness can't be tested separately from master. On
3713 * M/S emulation configuration, this function should be called
3714 * only on the master and it will handle both master and slave.
3716 WARN_ON(link == link->ap->slave_link);
3718 if (time_after(nodev_deadline, deadline))
3719 nodev_deadline = deadline;
3722 unsigned long now = jiffies;
3725 ready = tmp = check_ready(link);
3730 * -ENODEV could be transient. Ignore -ENODEV if link
3731 * is online. Also, some SATA devices take a long
3732 * time to clear 0xff after reset. Wait for
3733 * ATA_TMOUT_FF_WAIT[_LONG] on -ENODEV if link isn't
3736 * Note that some PATA controllers (pata_ali) explode
3737 * if status register is read more than once when
3738 * there's no device attached.
3740 if (ready == -ENODEV) {
3741 if (ata_link_online(link))
3743 else if ((link->ap->flags & ATA_FLAG_SATA) &&
3744 !ata_link_offline(link) &&
3745 time_before(now, nodev_deadline))
3751 if (time_after(now, deadline))
3754 if (!warned && time_after(now, start + 5 * HZ) &&
3755 (deadline - now > 3 * HZ)) {
3757 "link is slow to respond, please be patient "
3758 "(ready=%d)\n", tmp);
3762 ata_msleep(link->ap, 50);
3767 * ata_wait_after_reset - wait for link to become ready after reset
3768 * @link: link to be waited on
3769 * @deadline: deadline jiffies for the operation
3770 * @check_ready: callback to check link readiness
3772 * Wait for @link to become ready after reset.
3778 * 0 if @link is ready before @deadline; otherwise, -errno.
3780 int ata_wait_after_reset(struct ata_link *link, unsigned long deadline,
3781 int (*check_ready)(struct ata_link *link))
3783 ata_msleep(link->ap, ATA_WAIT_AFTER_RESET);
3785 return ata_wait_ready(link, deadline, check_ready);
3789 * sata_link_debounce - debounce SATA phy status
3790 * @link: ATA link to debounce SATA phy status for
3791 * @params: timing parameters { interval, duration, timeout } in msec
3792 * @deadline: deadline jiffies for the operation
3794 * Make sure SStatus of @link reaches stable state, determined by
3795 * holding the same value where DET is not 1 for @duration polled
3796 * every @interval, before @timeout. Timeout constraints the
3797 * beginning of the stable state. Because DET gets stuck at 1 on
3798 * some controllers after hot unplugging, this functions waits
3799 * until timeout then returns 0 if DET is stable at 1.
3801 * @timeout is further limited by @deadline. The sooner of the
3805 * Kernel thread context (may sleep)
3808 * 0 on success, -errno on failure.
3810 int sata_link_debounce(struct ata_link *link, const unsigned long *params,
3811 unsigned long deadline)
3813 unsigned long interval = params[0];
3814 unsigned long duration = params[1];
3815 unsigned long last_jiffies, t;
3819 t = ata_deadline(jiffies, params[2]);
3820 if (time_before(t, deadline))
3823 if ((rc = sata_scr_read(link, SCR_STATUS, &cur)))
3828 last_jiffies = jiffies;
3831 ata_msleep(link->ap, interval);
3832 if ((rc = sata_scr_read(link, SCR_STATUS, &cur)))
3838 if (cur == 1 && time_before(jiffies, deadline))
3840 if (time_after(jiffies,
3841 ata_deadline(last_jiffies, duration)))
3846 /* unstable, start over */
3848 last_jiffies = jiffies;
3850 /* Check deadline. If debouncing failed, return
3851 * -EPIPE to tell upper layer to lower link speed.
3853 if (time_after(jiffies, deadline))
3859 * sata_link_resume - resume SATA link
3860 * @link: ATA link to resume SATA
3861 * @params: timing parameters { interval, duration, timeout } in msec
3862 * @deadline: deadline jiffies for the operation
3864 * Resume SATA phy @link and debounce it.
3867 * Kernel thread context (may sleep)
3870 * 0 on success, -errno on failure.
3872 int sata_link_resume(struct ata_link *link, const unsigned long *params,
3873 unsigned long deadline)
3875 int tries = ATA_LINK_RESUME_TRIES;
3876 u32 scontrol, serror;
3879 if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
3883 * Writes to SControl sometimes get ignored under certain
3884 * controllers (ata_piix SIDPR). Make sure DET actually is
3888 scontrol = (scontrol & 0x0f0) | 0x300;
3889 if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol)))
3892 * Some PHYs react badly if SStatus is pounded
3893 * immediately after resuming. Delay 200ms before
3896 if (!(link->flags & ATA_LFLAG_NO_DB_DELAY))
3897 ata_msleep(link->ap, 200);
3899 /* is SControl restored correctly? */
3900 if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
3902 } while ((scontrol & 0xf0f) != 0x300 && --tries);
3904 if ((scontrol & 0xf0f) != 0x300) {
3905 ata_link_warn(link, "failed to resume link (SControl %X)\n",
3910 if (tries < ATA_LINK_RESUME_TRIES)
3911 ata_link_warn(link, "link resume succeeded after %d retries\n",
3912 ATA_LINK_RESUME_TRIES - tries);
3914 if ((rc = sata_link_debounce(link, params, deadline)))
3917 /* clear SError, some PHYs require this even for SRST to work */
3918 if (!(rc = sata_scr_read(link, SCR_ERROR, &serror)))
3919 rc = sata_scr_write(link, SCR_ERROR, serror);
3921 return rc != -EINVAL ? rc : 0;
3925 * sata_link_scr_lpm - manipulate SControl IPM and SPM fields
3926 * @link: ATA link to manipulate SControl for
3927 * @policy: LPM policy to configure
3928 * @spm_wakeup: initiate LPM transition to active state
3930 * Manipulate the IPM field of the SControl register of @link
3931 * according to @policy. If @policy is ATA_LPM_MAX_POWER and
3932 * @spm_wakeup is %true, the SPM field is manipulated to wake up
3933 * the link. This function also clears PHYRDY_CHG before
3940 * 0 on success, -errno otherwise.
3942 int sata_link_scr_lpm(struct ata_link *link, enum ata_lpm_policy policy,
3945 struct ata_eh_context *ehc = &link->eh_context;
3946 bool woken_up = false;
3950 rc = sata_scr_read(link, SCR_CONTROL, &scontrol);
3955 case ATA_LPM_MAX_POWER:
3956 /* disable all LPM transitions */
3957 scontrol |= (0x7 << 8);
3958 /* initiate transition to active state */
3960 scontrol |= (0x4 << 12);
3964 case ATA_LPM_MED_POWER:
3965 /* allow LPM to PARTIAL */
3966 scontrol &= ~(0x1 << 8);
3967 scontrol |= (0x6 << 8);
3969 case ATA_LPM_MED_POWER_WITH_DIPM:
3970 case ATA_LPM_MIN_POWER_WITH_PARTIAL:
3971 case ATA_LPM_MIN_POWER:
3972 if (ata_link_nr_enabled(link) > 0)
3973 /* no restrictions on LPM transitions */
3974 scontrol &= ~(0x7 << 8);
3976 /* empty port, power off */
3978 scontrol |= (0x1 << 2);
3985 rc = sata_scr_write(link, SCR_CONTROL, scontrol);
3989 /* give the link time to transit out of LPM state */
3993 /* clear PHYRDY_CHG from SError */
3994 ehc->i.serror &= ~SERR_PHYRDY_CHG;
3995 return sata_scr_write(link, SCR_ERROR, SERR_PHYRDY_CHG);
3999 * ata_std_prereset - prepare for reset
4000 * @link: ATA link to be reset
4001 * @deadline: deadline jiffies for the operation
4003 * @link is about to be reset. Initialize it. Failure from
4004 * prereset makes libata abort whole reset sequence and give up
4005 * that port, so prereset should be best-effort. It does its
4006 * best to prepare for reset sequence but if things go wrong, it
4007 * should just whine, not fail.
4010 * Kernel thread context (may sleep)
4013 * 0 on success, -errno otherwise.
4015 int ata_std_prereset(struct ata_link *link, unsigned long deadline)
4017 struct ata_port *ap = link->ap;
4018 struct ata_eh_context *ehc = &link->eh_context;
4019 const unsigned long *timing = sata_ehc_deb_timing(ehc);
4022 /* if we're about to do hardreset, nothing more to do */
4023 if (ehc->i.action & ATA_EH_HARDRESET)
4026 /* if SATA, resume link */
4027 if (ap->flags & ATA_FLAG_SATA) {
4028 rc = sata_link_resume(link, timing, deadline);
4029 /* whine about phy resume failure but proceed */
4030 if (rc && rc != -EOPNOTSUPP)
4032 "failed to resume link for reset (errno=%d)\n",
4036 /* no point in trying softreset on offline link */
4037 if (ata_phys_link_offline(link))
4038 ehc->i.action &= ~ATA_EH_SOFTRESET;
4044 * sata_link_hardreset - reset link via SATA phy reset
4045 * @link: link to reset
4046 * @timing: timing parameters { interval, duration, timeout } in msec
4047 * @deadline: deadline jiffies for the operation
4048 * @online: optional out parameter indicating link onlineness
4049 * @check_ready: optional callback to check link readiness
4051 * SATA phy-reset @link using DET bits of SControl register.
4052 * After hardreset, link readiness is waited upon using
4053 * ata_wait_ready() if @check_ready is specified. LLDs are
4054 * allowed to not specify @check_ready and wait itself after this
4055 * function returns. Device classification is LLD's
4058 * *@online is set to one iff reset succeeded and @link is online
4062 * Kernel thread context (may sleep)
4065 * 0 on success, -errno otherwise.
4067 int sata_link_hardreset(struct ata_link *link, const unsigned long *timing,
4068 unsigned long deadline,
4069 bool *online, int (*check_ready)(struct ata_link *))
4079 if (sata_set_spd_needed(link)) {
4080 /* SATA spec says nothing about how to reconfigure
4081 * spd. To be on the safe side, turn off phy during
4082 * reconfiguration. This works for at least ICH7 AHCI
4085 if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
4088 scontrol = (scontrol & 0x0f0) | 0x304;
4090 if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol)))
4096 /* issue phy wake/reset */
4097 if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
4100 scontrol = (scontrol & 0x0f0) | 0x301;
4102 if ((rc = sata_scr_write_flush(link, SCR_CONTROL, scontrol)))
4105 /* Couldn't find anything in SATA I/II specs, but AHCI-1.1
4106 * 10.4.2 says at least 1 ms.
4108 ata_msleep(link->ap, 1);
4110 /* bring link back */
4111 rc = sata_link_resume(link, timing, deadline);
4114 /* if link is offline nothing more to do */
4115 if (ata_phys_link_offline(link))
4118 /* Link is online. From this point, -ENODEV too is an error. */
4122 if (sata_pmp_supported(link->ap) && ata_is_host_link(link)) {
4123 /* If PMP is supported, we have to do follow-up SRST.
4124 * Some PMPs don't send D2H Reg FIS after hardreset if
4125 * the first port is empty. Wait only for
4126 * ATA_TMOUT_PMP_SRST_WAIT.
4129 unsigned long pmp_deadline;
4131 pmp_deadline = ata_deadline(jiffies,
4132 ATA_TMOUT_PMP_SRST_WAIT);
4133 if (time_after(pmp_deadline, deadline))
4134 pmp_deadline = deadline;
4135 ata_wait_ready(link, pmp_deadline, check_ready);
4143 rc = ata_wait_ready(link, deadline, check_ready);
4145 if (rc && rc != -EAGAIN) {
4146 /* online is set iff link is online && reset succeeded */
4149 ata_link_err(link, "COMRESET failed (errno=%d)\n", rc);
4151 DPRINTK("EXIT, rc=%d\n", rc);
4156 * sata_std_hardreset - COMRESET w/o waiting or classification
4157 * @link: link to reset
4158 * @class: resulting class of attached device
4159 * @deadline: deadline jiffies for the operation
4161 * Standard SATA COMRESET w/o waiting or classification.
4164 * Kernel thread context (may sleep)
4167 * 0 if link offline, -EAGAIN if link online, -errno on errors.
4169 int sata_std_hardreset(struct ata_link *link, unsigned int *class,
4170 unsigned long deadline)
4172 const unsigned long *timing = sata_ehc_deb_timing(&link->eh_context);
4177 rc = sata_link_hardreset(link, timing, deadline, &online, NULL);
4178 return online ? -EAGAIN : rc;
4182 * ata_std_postreset - standard postreset callback
4183 * @link: the target ata_link
4184 * @classes: classes of attached devices
4186 * This function is invoked after a successful reset. Note that
4187 * the device might have been reset more than once using
4188 * different reset methods before postreset is invoked.
4191 * Kernel thread context (may sleep)
4193 void ata_std_postreset(struct ata_link *link, unsigned int *classes)
4199 /* reset complete, clear SError */
4200 if (!sata_scr_read(link, SCR_ERROR, &serror))
4201 sata_scr_write(link, SCR_ERROR, serror);
4203 /* print link status */
4204 sata_print_link_status(link);
4210 * ata_dev_same_device - Determine whether new ID matches configured device
4211 * @dev: device to compare against
4212 * @new_class: class of the new device
4213 * @new_id: IDENTIFY page of the new device
4215 * Compare @new_class and @new_id against @dev and determine
4216 * whether @dev is the device indicated by @new_class and
4223 * 1 if @dev matches @new_class and @new_id, 0 otherwise.
4225 static int ata_dev_same_device(struct ata_device *dev, unsigned int new_class,
4228 const u16 *old_id = dev->id;
4229 unsigned char model[2][ATA_ID_PROD_LEN + 1];
4230 unsigned char serial[2][ATA_ID_SERNO_LEN + 1];
4232 if (dev->class != new_class) {
4233 ata_dev_info(dev, "class mismatch %d != %d\n",
4234 dev->class, new_class);
4238 ata_id_c_string(old_id, model[0], ATA_ID_PROD, sizeof(model[0]));
4239 ata_id_c_string(new_id, model[1], ATA_ID_PROD, sizeof(model[1]));
4240 ata_id_c_string(old_id, serial[0], ATA_ID_SERNO, sizeof(serial[0]));
4241 ata_id_c_string(new_id, serial[1], ATA_ID_SERNO, sizeof(serial[1]));
4243 if (strcmp(model[0], model[1])) {
4244 ata_dev_info(dev, "model number mismatch '%s' != '%s'\n",
4245 model[0], model[1]);
4249 if (strcmp(serial[0], serial[1])) {
4250 ata_dev_info(dev, "serial number mismatch '%s' != '%s'\n",
4251 serial[0], serial[1]);
4259 * ata_dev_reread_id - Re-read IDENTIFY data
4260 * @dev: target ATA device
4261 * @readid_flags: read ID flags
4263 * Re-read IDENTIFY page and make sure @dev is still attached to
4267 * Kernel thread context (may sleep)
4270 * 0 on success, negative errno otherwise
4272 int ata_dev_reread_id(struct ata_device *dev, unsigned int readid_flags)
4274 unsigned int class = dev->class;
4275 u16 *id = (void *)dev->link->ap->sector_buf;
4279 rc = ata_dev_read_id(dev, &class, readid_flags, id);
4283 /* is the device still there? */
4284 if (!ata_dev_same_device(dev, class, id))
4287 memcpy(dev->id, id, sizeof(id[0]) * ATA_ID_WORDS);
4292 * ata_dev_revalidate - Revalidate ATA device
4293 * @dev: device to revalidate
4294 * @new_class: new class code
4295 * @readid_flags: read ID flags
4297 * Re-read IDENTIFY page, make sure @dev is still attached to the
4298 * port and reconfigure it according to the new IDENTIFY page.
4301 * Kernel thread context (may sleep)
4304 * 0 on success, negative errno otherwise
4306 int ata_dev_revalidate(struct ata_device *dev, unsigned int new_class,
4307 unsigned int readid_flags)
4309 u64 n_sectors = dev->n_sectors;
4310 u64 n_native_sectors = dev->n_native_sectors;
4313 if (!ata_dev_enabled(dev))
4316 /* fail early if !ATA && !ATAPI to avoid issuing [P]IDENTIFY to PMP */
4317 if (ata_class_enabled(new_class) &&
4318 new_class != ATA_DEV_ATA &&
4319 new_class != ATA_DEV_ATAPI &&
4320 new_class != ATA_DEV_ZAC &&
4321 new_class != ATA_DEV_SEMB) {
4322 ata_dev_info(dev, "class mismatch %u != %u\n",
4323 dev->class, new_class);
4329 rc = ata_dev_reread_id(dev, readid_flags);
4333 /* configure device according to the new ID */
4334 rc = ata_dev_configure(dev);
4338 /* verify n_sectors hasn't changed */
4339 if (dev->class != ATA_DEV_ATA || !n_sectors ||
4340 dev->n_sectors == n_sectors)
4343 /* n_sectors has changed */
4344 ata_dev_warn(dev, "n_sectors mismatch %llu != %llu\n",
4345 (unsigned long long)n_sectors,
4346 (unsigned long long)dev->n_sectors);
4349 * Something could have caused HPA to be unlocked
4350 * involuntarily. If n_native_sectors hasn't changed and the
4351 * new size matches it, keep the device.
4353 if (dev->n_native_sectors == n_native_sectors &&
4354 dev->n_sectors > n_sectors && dev->n_sectors == n_native_sectors) {
4356 "new n_sectors matches native, probably "
4357 "late HPA unlock, n_sectors updated\n");
4358 /* use the larger n_sectors */
4363 * Some BIOSes boot w/o HPA but resume w/ HPA locked. Try
4364 * unlocking HPA in those cases.
4366 * https://bugzilla.kernel.org/show_bug.cgi?id=15396
4368 if (dev->n_native_sectors == n_native_sectors &&
4369 dev->n_sectors < n_sectors && n_sectors == n_native_sectors &&
4370 !(dev->horkage & ATA_HORKAGE_BROKEN_HPA)) {
4372 "old n_sectors matches native, probably "
4373 "late HPA lock, will try to unlock HPA\n");
4374 /* try unlocking HPA */
4375 dev->flags |= ATA_DFLAG_UNLOCK_HPA;
4380 /* restore original n_[native_]sectors and fail */
4381 dev->n_native_sectors = n_native_sectors;
4382 dev->n_sectors = n_sectors;
4384 ata_dev_err(dev, "revalidation failed (errno=%d)\n", rc);
4388 struct ata_blacklist_entry {
4389 const char *model_num;
4390 const char *model_rev;
4391 unsigned long horkage;
4394 static const struct ata_blacklist_entry ata_device_blacklist [] = {
4395 /* Devices with DMA related problems under Linux */
4396 { "WDC AC11000H", NULL, ATA_HORKAGE_NODMA },
4397 { "WDC AC22100H", NULL, ATA_HORKAGE_NODMA },
4398 { "WDC AC32500H", NULL, ATA_HORKAGE_NODMA },
4399 { "WDC AC33100H", NULL, ATA_HORKAGE_NODMA },
4400 { "WDC AC31600H", NULL, ATA_HORKAGE_NODMA },
4401 { "WDC AC32100H", "24.09P07", ATA_HORKAGE_NODMA },
4402 { "WDC AC23200L", "21.10N21", ATA_HORKAGE_NODMA },
4403 { "Compaq CRD-8241B", NULL, ATA_HORKAGE_NODMA },
4404 { "CRD-8400B", NULL, ATA_HORKAGE_NODMA },
4405 { "CRD-848[02]B", NULL, ATA_HORKAGE_NODMA },
4406 { "CRD-84", NULL, ATA_HORKAGE_NODMA },
4407 { "SanDisk SDP3B", NULL, ATA_HORKAGE_NODMA },
4408 { "SanDisk SDP3B-64", NULL, ATA_HORKAGE_NODMA },
4409 { "SANYO CD-ROM CRD", NULL, ATA_HORKAGE_NODMA },
4410 { "HITACHI CDR-8", NULL, ATA_HORKAGE_NODMA },
4411 { "HITACHI CDR-8[34]35",NULL, ATA_HORKAGE_NODMA },
4412 { "Toshiba CD-ROM XM-6202B", NULL, ATA_HORKAGE_NODMA },
4413 { "TOSHIBA CD-ROM XM-1702BC", NULL, ATA_HORKAGE_NODMA },
4414 { "CD-532E-A", NULL, ATA_HORKAGE_NODMA },
4415 { "E-IDE CD-ROM CR-840",NULL, ATA_HORKAGE_NODMA },
4416 { "CD-ROM Drive/F5A", NULL, ATA_HORKAGE_NODMA },
4417 { "WPI CDD-820", NULL, ATA_HORKAGE_NODMA },
4418 { "SAMSUNG CD-ROM SC-148C", NULL, ATA_HORKAGE_NODMA },
4419 { "SAMSUNG CD-ROM SC", NULL, ATA_HORKAGE_NODMA },
4420 { "ATAPI CD-ROM DRIVE 40X MAXIMUM",NULL,ATA_HORKAGE_NODMA },
4421 { "_NEC DV5800A", NULL, ATA_HORKAGE_NODMA },
4422 { "SAMSUNG CD-ROM SN-124", "N001", ATA_HORKAGE_NODMA },
4423 { "Seagate STT20000A", NULL, ATA_HORKAGE_NODMA },
4424 { " 2GB ATA Flash Disk", "ADMA428M", ATA_HORKAGE_NODMA },
4425 { "VRFDFC22048UCHC-TE*", NULL, ATA_HORKAGE_NODMA },
4426 /* Odd clown on sil3726/4726 PMPs */
4427 { "Config Disk", NULL, ATA_HORKAGE_DISABLE },
4429 /* Weird ATAPI devices */
4430 { "TORiSAN DVD-ROM DRD-N216", NULL, ATA_HORKAGE_MAX_SEC_128 },
4431 { "QUANTUM DAT DAT72-000", NULL, ATA_HORKAGE_ATAPI_MOD16_DMA },
4432 { "Slimtype DVD A DS8A8SH", NULL, ATA_HORKAGE_MAX_SEC_LBA48 },
4433 { "Slimtype DVD A DS8A9SH", NULL, ATA_HORKAGE_MAX_SEC_LBA48 },
4436 * Causes silent data corruption with higher max sects.
4437 * http://lkml.kernel.org/g/x49wpy40ysk.fsf@segfault.boston.devel.redhat.com
4439 { "ST380013AS", "3.20", ATA_HORKAGE_MAX_SEC_1024 },
4442 * These devices time out with higher max sects.
4443 * https://bugzilla.kernel.org/show_bug.cgi?id=121671
4445 { "LITEON CX1-JB*-HP", NULL, ATA_HORKAGE_MAX_SEC_1024 },
4446 { "LITEON EP1-*", NULL, ATA_HORKAGE_MAX_SEC_1024 },
4448 /* Devices we expect to fail diagnostics */
4450 /* Devices where NCQ should be avoided */
4452 { "WDC WD740ADFD-00", NULL, ATA_HORKAGE_NONCQ },
4453 { "WDC WD740ADFD-00NLR1", NULL, ATA_HORKAGE_NONCQ, },
4454 /* http://thread.gmane.org/gmane.linux.ide/14907 */
4455 { "FUJITSU MHT2060BH", NULL, ATA_HORKAGE_NONCQ },
4457 { "Maxtor *", "BANC*", ATA_HORKAGE_NONCQ },
4458 { "Maxtor 7V300F0", "VA111630", ATA_HORKAGE_NONCQ },
4459 { "ST380817AS", "3.42", ATA_HORKAGE_NONCQ },
4460 { "ST3160023AS", "3.42", ATA_HORKAGE_NONCQ },
4461 { "OCZ CORE_SSD", "02.10104", ATA_HORKAGE_NONCQ },
4463 /* Seagate NCQ + FLUSH CACHE firmware bug */
4464 { "ST31500341AS", "SD1[5-9]", ATA_HORKAGE_NONCQ |
4465 ATA_HORKAGE_FIRMWARE_WARN },
4467 { "ST31000333AS", "SD1[5-9]", ATA_HORKAGE_NONCQ |
4468 ATA_HORKAGE_FIRMWARE_WARN },
4470 { "ST3640[36]23AS", "SD1[5-9]", ATA_HORKAGE_NONCQ |
4471 ATA_HORKAGE_FIRMWARE_WARN },
4473 { "ST3320[68]13AS", "SD1[5-9]", ATA_HORKAGE_NONCQ |
4474 ATA_HORKAGE_FIRMWARE_WARN },
4476 /* drives which fail FPDMA_AA activation (some may freeze afterwards) */
4477 { "ST1000LM024 HN-M101MBB", "2AR10001", ATA_HORKAGE_BROKEN_FPDMA_AA },
4478 { "ST1000LM024 HN-M101MBB", "2BA30001", ATA_HORKAGE_BROKEN_FPDMA_AA },
4479 { "VB0250EAVER", "HPG7", ATA_HORKAGE_BROKEN_FPDMA_AA },
4481 /* Blacklist entries taken from Silicon Image 3124/3132
4482 Windows driver .inf file - also several Linux problem reports */
4483 { "HTS541060G9SA00", "MB3OC60D", ATA_HORKAGE_NONCQ, },
4484 { "HTS541080G9SA00", "MB4OC60D", ATA_HORKAGE_NONCQ, },
4485 { "HTS541010G9SA00", "MBZOC60D", ATA_HORKAGE_NONCQ, },
4487 /* https://bugzilla.kernel.org/show_bug.cgi?id=15573 */
4488 { "C300-CTFDDAC128MAG", "0001", ATA_HORKAGE_NONCQ, },
4490 /* Some Sandisk SSDs lock up hard with NCQ enabled. Reported on
4491 SD7SN6S256G and SD8SN8U256G */
4492 { "SanDisk SD[78]SN*G", NULL, ATA_HORKAGE_NONCQ, },
4494 /* devices which puke on READ_NATIVE_MAX */
4495 { "HDS724040KLSA80", "KFAOA20N", ATA_HORKAGE_BROKEN_HPA, },
4496 { "WDC WD3200JD-00KLB0", "WD-WCAMR1130137", ATA_HORKAGE_BROKEN_HPA },
4497 { "WDC WD2500JD-00HBB0", "WD-WMAL71490727", ATA_HORKAGE_BROKEN_HPA },
4498 { "MAXTOR 6L080L4", "A93.0500", ATA_HORKAGE_BROKEN_HPA },
4500 /* this one allows HPA unlocking but fails IOs on the area */
4501 { "OCZ-VERTEX", "1.30", ATA_HORKAGE_BROKEN_HPA },
4503 /* Devices which report 1 sector over size HPA */
4504 { "ST340823A", NULL, ATA_HORKAGE_HPA_SIZE, },
4505 { "ST320413A", NULL, ATA_HORKAGE_HPA_SIZE, },
4506 { "ST310211A", NULL, ATA_HORKAGE_HPA_SIZE, },
4508 /* Devices which get the IVB wrong */
4509 { "QUANTUM FIREBALLlct10 05", "A03.0900", ATA_HORKAGE_IVB, },
4510 /* Maybe we should just blacklist TSSTcorp... */
4511 { "TSSTcorp CDDVDW SH-S202[HJN]", "SB0[01]", ATA_HORKAGE_IVB, },
4513 /* Devices that do not need bridging limits applied */
4514 { "MTRON MSP-SATA*", NULL, ATA_HORKAGE_BRIDGE_OK, },
4515 { "BUFFALO HD-QSU2/R5", NULL, ATA_HORKAGE_BRIDGE_OK, },
4517 /* Devices which aren't very happy with higher link speeds */
4518 { "WD My Book", NULL, ATA_HORKAGE_1_5_GBPS, },
4519 { "Seagate FreeAgent GoFlex", NULL, ATA_HORKAGE_1_5_GBPS, },
4522 * Devices which choke on SETXFER. Applies only if both the
4523 * device and controller are SATA.
4525 { "PIONEER DVD-RW DVRTD08", NULL, ATA_HORKAGE_NOSETXFER },
4526 { "PIONEER DVD-RW DVRTD08A", NULL, ATA_HORKAGE_NOSETXFER },
4527 { "PIONEER DVD-RW DVR-215", NULL, ATA_HORKAGE_NOSETXFER },
4528 { "PIONEER DVD-RW DVR-212D", NULL, ATA_HORKAGE_NOSETXFER },
4529 { "PIONEER DVD-RW DVR-216D", NULL, ATA_HORKAGE_NOSETXFER },
4531 /* Crucial BX100 SSD 500GB has broken LPM support */
4532 { "CT500BX100SSD1", NULL, ATA_HORKAGE_NOLPM },
4534 /* 512GB MX100 with MU01 firmware has both queued TRIM and LPM issues */
4535 { "Crucial_CT512MX100*", "MU01", ATA_HORKAGE_NO_NCQ_TRIM |
4536 ATA_HORKAGE_ZERO_AFTER_TRIM |
4537 ATA_HORKAGE_NOLPM, },
4538 /* 512GB MX100 with newer firmware has only LPM issues */
4539 { "Crucial_CT512MX100*", NULL, ATA_HORKAGE_ZERO_AFTER_TRIM |
4540 ATA_HORKAGE_NOLPM, },
4542 /* 480GB+ M500 SSDs have both queued TRIM and LPM issues */
4543 { "Crucial_CT480M500*", NULL, ATA_HORKAGE_NO_NCQ_TRIM |
4544 ATA_HORKAGE_ZERO_AFTER_TRIM |
4545 ATA_HORKAGE_NOLPM, },
4546 { "Crucial_CT960M500*", NULL, ATA_HORKAGE_NO_NCQ_TRIM |
4547 ATA_HORKAGE_ZERO_AFTER_TRIM |
4548 ATA_HORKAGE_NOLPM, },
4550 /* These specific Samsung models/firmware-revs do not handle LPM well */
4551 { "SAMSUNG MZMPC128HBFU-000MV", "CXM14M1Q", ATA_HORKAGE_NOLPM, },
4552 { "SAMSUNG SSD PM830 mSATA *", "CXM13D1Q", ATA_HORKAGE_NOLPM, },
4554 /* devices that don't properly handle queued TRIM commands */
4555 { "Micron_M500IT_*", "MU01", ATA_HORKAGE_NO_NCQ_TRIM |
4556 ATA_HORKAGE_ZERO_AFTER_TRIM, },
4557 { "Micron_M500_*", NULL, ATA_HORKAGE_NO_NCQ_TRIM |
4558 ATA_HORKAGE_ZERO_AFTER_TRIM, },
4559 { "Crucial_CT*M500*", NULL, ATA_HORKAGE_NO_NCQ_TRIM |
4560 ATA_HORKAGE_ZERO_AFTER_TRIM, },
4561 { "Micron_M5[15]0_*", "MU01", ATA_HORKAGE_NO_NCQ_TRIM |
4562 ATA_HORKAGE_ZERO_AFTER_TRIM, },
4563 { "Crucial_CT*M550*", "MU01", ATA_HORKAGE_NO_NCQ_TRIM |
4564 ATA_HORKAGE_ZERO_AFTER_TRIM, },
4565 { "Crucial_CT*MX100*", "MU01", ATA_HORKAGE_NO_NCQ_TRIM |
4566 ATA_HORKAGE_ZERO_AFTER_TRIM, },
4567 { "Samsung SSD 840*", NULL, ATA_HORKAGE_NO_NCQ_TRIM |
4568 ATA_HORKAGE_ZERO_AFTER_TRIM, },
4569 { "Samsung SSD 850*", NULL, ATA_HORKAGE_NO_NCQ_TRIM |
4570 ATA_HORKAGE_ZERO_AFTER_TRIM, },
4571 { "FCCT*M500*", NULL, ATA_HORKAGE_NO_NCQ_TRIM |
4572 ATA_HORKAGE_ZERO_AFTER_TRIM, },
4574 /* devices that don't properly handle TRIM commands */
4575 { "SuperSSpeed S238*", NULL, ATA_HORKAGE_NOTRIM, },
4578 * As defined, the DRAT (Deterministic Read After Trim) and RZAT
4579 * (Return Zero After Trim) flags in the ATA Command Set are
4580 * unreliable in the sense that they only define what happens if
4581 * the device successfully executed the DSM TRIM command. TRIM
4582 * is only advisory, however, and the device is free to silently
4583 * ignore all or parts of the request.
4585 * Whitelist drives that are known to reliably return zeroes
4590 * The intel 510 drive has buggy DRAT/RZAT. Explicitly exclude
4591 * that model before whitelisting all other intel SSDs.
4593 { "INTEL*SSDSC2MH*", NULL, 0, },
4595 { "Micron*", NULL, ATA_HORKAGE_ZERO_AFTER_TRIM, },
4596 { "Crucial*", NULL, ATA_HORKAGE_ZERO_AFTER_TRIM, },
4597 { "INTEL*SSD*", NULL, ATA_HORKAGE_ZERO_AFTER_TRIM, },
4598 { "SSD*INTEL*", NULL, ATA_HORKAGE_ZERO_AFTER_TRIM, },
4599 { "Samsung*SSD*", NULL, ATA_HORKAGE_ZERO_AFTER_TRIM, },
4600 { "SAMSUNG*SSD*", NULL, ATA_HORKAGE_ZERO_AFTER_TRIM, },
4601 { "ST[1248][0248]0[FH]*", NULL, ATA_HORKAGE_ZERO_AFTER_TRIM, },
4604 * Some WD SATA-I drives spin up and down erratically when the link
4605 * is put into the slumber mode. We don't have full list of the
4606 * affected devices. Disable LPM if the device matches one of the
4607 * known prefixes and is SATA-1. As a side effect LPM partial is
4610 * https://bugzilla.kernel.org/show_bug.cgi?id=57211
4612 { "WDC WD800JD-*", NULL, ATA_HORKAGE_WD_BROKEN_LPM },
4613 { "WDC WD1200JD-*", NULL, ATA_HORKAGE_WD_BROKEN_LPM },
4614 { "WDC WD1600JD-*", NULL, ATA_HORKAGE_WD_BROKEN_LPM },
4615 { "WDC WD2000JD-*", NULL, ATA_HORKAGE_WD_BROKEN_LPM },
4616 { "WDC WD2500JD-*", NULL, ATA_HORKAGE_WD_BROKEN_LPM },
4617 { "WDC WD3000JD-*", NULL, ATA_HORKAGE_WD_BROKEN_LPM },
4618 { "WDC WD3200JD-*", NULL, ATA_HORKAGE_WD_BROKEN_LPM },
4624 static unsigned long ata_dev_blacklisted(const struct ata_device *dev)
4626 unsigned char model_num[ATA_ID_PROD_LEN + 1];
4627 unsigned char model_rev[ATA_ID_FW_REV_LEN + 1];
4628 const struct ata_blacklist_entry *ad = ata_device_blacklist;
4630 ata_id_c_string(dev->id, model_num, ATA_ID_PROD, sizeof(model_num));
4631 ata_id_c_string(dev->id, model_rev, ATA_ID_FW_REV, sizeof(model_rev));
4633 while (ad->model_num) {
4634 if (glob_match(ad->model_num, model_num)) {
4635 if (ad->model_rev == NULL)
4637 if (glob_match(ad->model_rev, model_rev))
4645 static int ata_dma_blacklisted(const struct ata_device *dev)
4647 /* We don't support polling DMA.
4648 * DMA blacklist those ATAPI devices with CDB-intr (and use PIO)
4649 * if the LLDD handles only interrupts in the HSM_ST_LAST state.
4651 if ((dev->link->ap->flags & ATA_FLAG_PIO_POLLING) &&
4652 (dev->flags & ATA_DFLAG_CDB_INTR))
4654 return (dev->horkage & ATA_HORKAGE_NODMA) ? 1 : 0;
4658 * ata_is_40wire - check drive side detection
4661 * Perform drive side detection decoding, allowing for device vendors
4662 * who can't follow the documentation.
4665 static int ata_is_40wire(struct ata_device *dev)
4667 if (dev->horkage & ATA_HORKAGE_IVB)
4668 return ata_drive_40wire_relaxed(dev->id);
4669 return ata_drive_40wire(dev->id);
4673 * cable_is_40wire - 40/80/SATA decider
4674 * @ap: port to consider
4676 * This function encapsulates the policy for speed management
4677 * in one place. At the moment we don't cache the result but
4678 * there is a good case for setting ap->cbl to the result when
4679 * we are called with unknown cables (and figuring out if it
4680 * impacts hotplug at all).
4682 * Return 1 if the cable appears to be 40 wire.
4685 static int cable_is_40wire(struct ata_port *ap)
4687 struct ata_link *link;
4688 struct ata_device *dev;
4690 /* If the controller thinks we are 40 wire, we are. */
4691 if (ap->cbl == ATA_CBL_PATA40)
4694 /* If the controller thinks we are 80 wire, we are. */
4695 if (ap->cbl == ATA_CBL_PATA80 || ap->cbl == ATA_CBL_SATA)
4698 /* If the system is known to be 40 wire short cable (eg
4699 * laptop), then we allow 80 wire modes even if the drive
4702 if (ap->cbl == ATA_CBL_PATA40_SHORT)
4705 /* If the controller doesn't know, we scan.
4707 * Note: We look for all 40 wire detects at this point. Any
4708 * 80 wire detect is taken to be 80 wire cable because
4709 * - in many setups only the one drive (slave if present) will
4710 * give a valid detect
4711 * - if you have a non detect capable drive you don't want it
4712 * to colour the choice
4714 ata_for_each_link(link, ap, EDGE) {
4715 ata_for_each_dev(dev, link, ENABLED) {
4716 if (!ata_is_40wire(dev))
4724 * ata_dev_xfermask - Compute supported xfermask of the given device
4725 * @dev: Device to compute xfermask for
4727 * Compute supported xfermask of @dev and store it in
4728 * dev->*_mask. This function is responsible for applying all
4729 * known limits including host controller limits, device
4735 static void ata_dev_xfermask(struct ata_device *dev)
4737 struct ata_link *link = dev->link;
4738 struct ata_port *ap = link->ap;
4739 struct ata_host *host = ap->host;
4740 unsigned long xfer_mask;
4742 /* controller modes available */
4743 xfer_mask = ata_pack_xfermask(ap->pio_mask,
4744 ap->mwdma_mask, ap->udma_mask);
4746 /* drive modes available */
4747 xfer_mask &= ata_pack_xfermask(dev->pio_mask,
4748 dev->mwdma_mask, dev->udma_mask);
4749 xfer_mask &= ata_id_xfermask(dev->id);
4752 * CFA Advanced TrueIDE timings are not allowed on a shared
4755 if (ata_dev_pair(dev)) {
4756 /* No PIO5 or PIO6 */
4757 xfer_mask &= ~(0x03 << (ATA_SHIFT_PIO + 5));
4758 /* No MWDMA3 or MWDMA 4 */
4759 xfer_mask &= ~(0x03 << (ATA_SHIFT_MWDMA + 3));
4762 if (ata_dma_blacklisted(dev)) {
4763 xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA);
4765 "device is on DMA blacklist, disabling DMA\n");
4768 if ((host->flags & ATA_HOST_SIMPLEX) &&
4769 host->simplex_claimed && host->simplex_claimed != ap) {
4770 xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA);
4772 "simplex DMA is claimed by other device, disabling DMA\n");
4775 if (ap->flags & ATA_FLAG_NO_IORDY)
4776 xfer_mask &= ata_pio_mask_no_iordy(dev);
4778 if (ap->ops->mode_filter)
4779 xfer_mask = ap->ops->mode_filter(dev, xfer_mask);
4781 /* Apply cable rule here. Don't apply it early because when
4782 * we handle hot plug the cable type can itself change.
4783 * Check this last so that we know if the transfer rate was
4784 * solely limited by the cable.
4785 * Unknown or 80 wire cables reported host side are checked
4786 * drive side as well. Cases where we know a 40wire cable
4787 * is used safely for 80 are not checked here.
4789 if (xfer_mask & (0xF8 << ATA_SHIFT_UDMA))
4790 /* UDMA/44 or higher would be available */
4791 if (cable_is_40wire(ap)) {
4793 "limited to UDMA/33 due to 40-wire cable\n");
4794 xfer_mask &= ~(0xF8 << ATA_SHIFT_UDMA);
4797 ata_unpack_xfermask(xfer_mask, &dev->pio_mask,
4798 &dev->mwdma_mask, &dev->udma_mask);
4802 * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command
4803 * @dev: Device to which command will be sent
4805 * Issue SET FEATURES - XFER MODE command to device @dev
4809 * PCI/etc. bus probe sem.
4812 * 0 on success, AC_ERR_* mask otherwise.
4815 static unsigned int ata_dev_set_xfermode(struct ata_device *dev)
4817 struct ata_taskfile tf;
4818 unsigned int err_mask;
4820 /* set up set-features taskfile */
4821 DPRINTK("set features - xfer mode\n");
4823 /* Some controllers and ATAPI devices show flaky interrupt
4824 * behavior after setting xfer mode. Use polling instead.
4826 ata_tf_init(dev, &tf);
4827 tf.command = ATA_CMD_SET_FEATURES;
4828 tf.feature = SETFEATURES_XFER;
4829 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_POLLING;
4830 tf.protocol = ATA_PROT_NODATA;
4831 /* If we are using IORDY we must send the mode setting command */
4832 if (ata_pio_need_iordy(dev))
4833 tf.nsect = dev->xfer_mode;
4834 /* If the device has IORDY and the controller does not - turn it off */
4835 else if (ata_id_has_iordy(dev->id))
4837 else /* In the ancient relic department - skip all of this */
4840 /* On some disks, this command causes spin-up, so we need longer timeout */
4841 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 15000);
4843 DPRINTK("EXIT, err_mask=%x\n", err_mask);
4848 * ata_dev_set_feature - Issue SET FEATURES - SATA FEATURES
4849 * @dev: Device to which command will be sent
4850 * @enable: Whether to enable or disable the feature
4851 * @feature: The sector count represents the feature to set
4853 * Issue SET FEATURES - SATA FEATURES command to device @dev
4854 * on port @ap with sector count
4857 * PCI/etc. bus probe sem.
4860 * 0 on success, AC_ERR_* mask otherwise.
4862 unsigned int ata_dev_set_feature(struct ata_device *dev, u8 enable, u8 feature)
4864 struct ata_taskfile tf;
4865 unsigned int err_mask;
4866 unsigned long timeout = 0;
4868 /* set up set-features taskfile */
4869 DPRINTK("set features - SATA features\n");
4871 ata_tf_init(dev, &tf);
4872 tf.command = ATA_CMD_SET_FEATURES;
4873 tf.feature = enable;
4874 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
4875 tf.protocol = ATA_PROT_NODATA;
4878 if (enable == SETFEATURES_SPINUP)
4879 timeout = ata_probe_timeout ?
4880 ata_probe_timeout * 1000 : SETFEATURES_SPINUP_TIMEOUT;
4881 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, timeout);
4883 DPRINTK("EXIT, err_mask=%x\n", err_mask);
4886 EXPORT_SYMBOL_GPL(ata_dev_set_feature);
4889 * ata_dev_init_params - Issue INIT DEV PARAMS command
4890 * @dev: Device to which command will be sent
4891 * @heads: Number of heads (taskfile parameter)
4892 * @sectors: Number of sectors (taskfile parameter)
4895 * Kernel thread context (may sleep)
4898 * 0 on success, AC_ERR_* mask otherwise.
4900 static unsigned int ata_dev_init_params(struct ata_device *dev,
4901 u16 heads, u16 sectors)
4903 struct ata_taskfile tf;
4904 unsigned int err_mask;
4906 /* Number of sectors per track 1-255. Number of heads 1-16 */
4907 if (sectors < 1 || sectors > 255 || heads < 1 || heads > 16)
4908 return AC_ERR_INVALID;
4910 /* set up init dev params taskfile */
4911 DPRINTK("init dev params \n");
4913 ata_tf_init(dev, &tf);
4914 tf.command = ATA_CMD_INIT_DEV_PARAMS;
4915 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
4916 tf.protocol = ATA_PROT_NODATA;
4918 tf.device |= (heads - 1) & 0x0f; /* max head = num. of heads - 1 */
4920 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
4921 /* A clean abort indicates an original or just out of spec drive
4922 and we should continue as we issue the setup based on the
4923 drive reported working geometry */
4924 if (err_mask == AC_ERR_DEV && (tf.feature & ATA_ABORTED))
4927 DPRINTK("EXIT, err_mask=%x\n", err_mask);
4932 * atapi_check_dma - Check whether ATAPI DMA can be supported
4933 * @qc: Metadata associated with taskfile to check
4935 * Allow low-level driver to filter ATA PACKET commands, returning
4936 * a status indicating whether or not it is OK to use DMA for the
4937 * supplied PACKET command.
4940 * spin_lock_irqsave(host lock)
4942 * RETURNS: 0 when ATAPI DMA can be used
4945 int atapi_check_dma(struct ata_queued_cmd *qc)
4947 struct ata_port *ap = qc->ap;
4949 /* Don't allow DMA if it isn't multiple of 16 bytes. Quite a
4950 * few ATAPI devices choke on such DMA requests.
4952 if (!(qc->dev->horkage & ATA_HORKAGE_ATAPI_MOD16_DMA) &&
4953 unlikely(qc->nbytes & 15))
4956 if (ap->ops->check_atapi_dma)
4957 return ap->ops->check_atapi_dma(qc);
4963 * ata_std_qc_defer - Check whether a qc needs to be deferred
4964 * @qc: ATA command in question
4966 * Non-NCQ commands cannot run with any other command, NCQ or
4967 * not. As upper layer only knows the queue depth, we are
4968 * responsible for maintaining exclusion. This function checks
4969 * whether a new command @qc can be issued.
4972 * spin_lock_irqsave(host lock)
4975 * ATA_DEFER_* if deferring is needed, 0 otherwise.
4977 int ata_std_qc_defer(struct ata_queued_cmd *qc)
4979 struct ata_link *link = qc->dev->link;
4981 if (ata_is_ncq(qc->tf.protocol)) {
4982 if (!ata_tag_valid(link->active_tag))
4985 if (!ata_tag_valid(link->active_tag) && !link->sactive)
4989 return ATA_DEFER_LINK;
4992 void ata_noop_qc_prep(struct ata_queued_cmd *qc) { }
4995 * ata_sg_init - Associate command with scatter-gather table.
4996 * @qc: Command to be associated
4997 * @sg: Scatter-gather table.
4998 * @n_elem: Number of elements in s/g table.
5000 * Initialize the data-related elements of queued_cmd @qc
5001 * to point to a scatter-gather table @sg, containing @n_elem
5005 * spin_lock_irqsave(host lock)
5007 void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
5008 unsigned int n_elem)
5011 qc->n_elem = n_elem;
5015 #ifdef CONFIG_HAS_DMA
5018 * ata_sg_clean - Unmap DMA memory associated with command
5019 * @qc: Command containing DMA memory to be released
5021 * Unmap all mapped DMA memory associated with this command.
5024 * spin_lock_irqsave(host lock)
5026 static void ata_sg_clean(struct ata_queued_cmd *qc)
5028 struct ata_port *ap = qc->ap;
5029 struct scatterlist *sg = qc->sg;
5030 int dir = qc->dma_dir;
5032 WARN_ON_ONCE(sg == NULL);
5034 VPRINTK("unmapping %u sg elements\n", qc->n_elem);
5037 dma_unmap_sg(ap->dev, sg, qc->orig_n_elem, dir);
5039 qc->flags &= ~ATA_QCFLAG_DMAMAP;
5044 * ata_sg_setup - DMA-map the scatter-gather table associated with a command.
5045 * @qc: Command with scatter-gather table to be mapped.
5047 * DMA-map the scatter-gather table associated with queued_cmd @qc.
5050 * spin_lock_irqsave(host lock)
5053 * Zero on success, negative on error.
5056 static int ata_sg_setup(struct ata_queued_cmd *qc)
5058 struct ata_port *ap = qc->ap;
5059 unsigned int n_elem;
5061 VPRINTK("ENTER, ata%u\n", ap->print_id);
5063 n_elem = dma_map_sg(ap->dev, qc->sg, qc->n_elem, qc->dma_dir);
5067 VPRINTK("%d sg elements mapped\n", n_elem);
5068 qc->orig_n_elem = qc->n_elem;
5069 qc->n_elem = n_elem;
5070 qc->flags |= ATA_QCFLAG_DMAMAP;
5075 #else /* !CONFIG_HAS_DMA */
5077 static inline void ata_sg_clean(struct ata_queued_cmd *qc) {}
5078 static inline int ata_sg_setup(struct ata_queued_cmd *qc) { return -1; }
5080 #endif /* !CONFIG_HAS_DMA */
5083 * swap_buf_le16 - swap halves of 16-bit words in place
5084 * @buf: Buffer to swap
5085 * @buf_words: Number of 16-bit words in buffer.
5087 * Swap halves of 16-bit words if needed to convert from
5088 * little-endian byte order to native cpu byte order, or
5092 * Inherited from caller.
5094 void swap_buf_le16(u16 *buf, unsigned int buf_words)
5099 for (i = 0; i < buf_words; i++)
5100 buf[i] = le16_to_cpu(buf[i]);
5101 #endif /* __BIG_ENDIAN */
5105 * ata_qc_new_init - Request an available ATA command, and initialize it
5106 * @dev: Device from whom we request an available command structure
5113 struct ata_queued_cmd *ata_qc_new_init(struct ata_device *dev, int tag)
5115 struct ata_port *ap = dev->link->ap;
5116 struct ata_queued_cmd *qc;
5118 /* no command while frozen */
5119 if (unlikely(ap->pflags & ATA_PFLAG_FROZEN))
5123 if (ap->flags & ATA_FLAG_SAS_HOST) {
5124 tag = ata_sas_allocate_tag(ap);
5129 qc = __ata_qc_from_tag(ap, tag);
5130 qc->tag = qc->hw_tag = tag;
5141 * ata_qc_free - free unused ata_queued_cmd
5142 * @qc: Command to complete
5144 * Designed to free unused ata_queued_cmd object
5145 * in case something prevents using it.
5148 * spin_lock_irqsave(host lock)
5150 void ata_qc_free(struct ata_queued_cmd *qc)
5152 struct ata_port *ap;
5155 WARN_ON_ONCE(qc == NULL); /* ata_qc_from_tag _might_ return NULL */
5160 if (ata_tag_valid(tag)) {
5161 qc->tag = ATA_TAG_POISON;
5162 if (ap->flags & ATA_FLAG_SAS_HOST)
5163 ata_sas_free_tag(tag, ap);
5167 void __ata_qc_complete(struct ata_queued_cmd *qc)
5169 struct ata_port *ap;
5170 struct ata_link *link;
5172 WARN_ON_ONCE(qc == NULL); /* ata_qc_from_tag _might_ return NULL */
5173 WARN_ON_ONCE(!(qc->flags & ATA_QCFLAG_ACTIVE));
5175 link = qc->dev->link;
5177 if (likely(qc->flags & ATA_QCFLAG_DMAMAP))
5180 /* command should be marked inactive atomically with qc completion */
5181 if (ata_is_ncq(qc->tf.protocol)) {
5182 link->sactive &= ~(1 << qc->hw_tag);
5184 ap->nr_active_links--;
5186 link->active_tag = ATA_TAG_POISON;
5187 ap->nr_active_links--;
5190 /* clear exclusive status */
5191 if (unlikely(qc->flags & ATA_QCFLAG_CLEAR_EXCL &&
5192 ap->excl_link == link))
5193 ap->excl_link = NULL;
5195 /* atapi: mark qc as inactive to prevent the interrupt handler
5196 * from completing the command twice later, before the error handler
5197 * is called. (when rc != 0 and atapi request sense is needed)
5199 qc->flags &= ~ATA_QCFLAG_ACTIVE;
5200 ap->qc_active &= ~(1ULL << qc->tag);
5202 /* call completion callback */
5203 qc->complete_fn(qc);
5206 static void fill_result_tf(struct ata_queued_cmd *qc)
5208 struct ata_port *ap = qc->ap;
5210 qc->result_tf.flags = qc->tf.flags;
5211 ap->ops->qc_fill_rtf(qc);
5214 static void ata_verify_xfer(struct ata_queued_cmd *qc)
5216 struct ata_device *dev = qc->dev;
5218 if (!ata_is_data(qc->tf.protocol))
5221 if ((dev->mwdma_mask || dev->udma_mask) && ata_is_pio(qc->tf.protocol))
5224 dev->flags &= ~ATA_DFLAG_DUBIOUS_XFER;
5228 * ata_qc_complete - Complete an active ATA command
5229 * @qc: Command to complete
5231 * Indicate to the mid and upper layers that an ATA command has
5232 * completed, with either an ok or not-ok status.
5234 * Refrain from calling this function multiple times when
5235 * successfully completing multiple NCQ commands.
5236 * ata_qc_complete_multiple() should be used instead, which will
5237 * properly update IRQ expect state.
5240 * spin_lock_irqsave(host lock)
5242 void ata_qc_complete(struct ata_queued_cmd *qc)
5244 struct ata_port *ap = qc->ap;
5246 /* Trigger the LED (if available) */
5247 ledtrig_disk_activity(!!(qc->tf.flags & ATA_TFLAG_WRITE));
5249 /* XXX: New EH and old EH use different mechanisms to
5250 * synchronize EH with regular execution path.
5252 * In new EH, a failed qc is marked with ATA_QCFLAG_FAILED.
5253 * Normal execution path is responsible for not accessing a
5254 * failed qc. libata core enforces the rule by returning NULL
5255 * from ata_qc_from_tag() for failed qcs.
5257 * Old EH depends on ata_qc_complete() nullifying completion
5258 * requests if ATA_QCFLAG_EH_SCHEDULED is set. Old EH does
5259 * not synchronize with interrupt handler. Only PIO task is
5262 if (ap->ops->error_handler) {
5263 struct ata_device *dev = qc->dev;
5264 struct ata_eh_info *ehi = &dev->link->eh_info;
5266 if (unlikely(qc->err_mask))
5267 qc->flags |= ATA_QCFLAG_FAILED;
5270 * Finish internal commands without any further processing
5271 * and always with the result TF filled.
5273 if (unlikely(ata_tag_internal(qc->tag))) {
5275 trace_ata_qc_complete_internal(qc);
5276 __ata_qc_complete(qc);
5281 * Non-internal qc has failed. Fill the result TF and
5284 if (unlikely(qc->flags & ATA_QCFLAG_FAILED)) {
5286 trace_ata_qc_complete_failed(qc);
5287 ata_qc_schedule_eh(qc);
5291 WARN_ON_ONCE(ap->pflags & ATA_PFLAG_FROZEN);
5293 /* read result TF if requested */
5294 if (qc->flags & ATA_QCFLAG_RESULT_TF)
5297 trace_ata_qc_complete_done(qc);
5298 /* Some commands need post-processing after successful
5301 switch (qc->tf.command) {
5302 case ATA_CMD_SET_FEATURES:
5303 if (qc->tf.feature != SETFEATURES_WC_ON &&
5304 qc->tf.feature != SETFEATURES_WC_OFF &&
5305 qc->tf.feature != SETFEATURES_RA_ON &&
5306 qc->tf.feature != SETFEATURES_RA_OFF)
5309 case ATA_CMD_INIT_DEV_PARAMS: /* CHS translation changed */
5310 case ATA_CMD_SET_MULTI: /* multi_count changed */
5311 /* revalidate device */
5312 ehi->dev_action[dev->devno] |= ATA_EH_REVALIDATE;
5313 ata_port_schedule_eh(ap);
5317 dev->flags |= ATA_DFLAG_SLEEPING;
5321 if (unlikely(dev->flags & ATA_DFLAG_DUBIOUS_XFER))
5322 ata_verify_xfer(qc);
5324 __ata_qc_complete(qc);
5326 if (qc->flags & ATA_QCFLAG_EH_SCHEDULED)
5329 /* read result TF if failed or requested */
5330 if (qc->err_mask || qc->flags & ATA_QCFLAG_RESULT_TF)
5333 __ata_qc_complete(qc);
5338 * ata_qc_complete_multiple - Complete multiple qcs successfully
5339 * @ap: port in question
5340 * @qc_active: new qc_active mask
5342 * Complete in-flight commands. This functions is meant to be
5343 * called from low-level driver's interrupt routine to complete
5344 * requests normally. ap->qc_active and @qc_active is compared
5345 * and commands are completed accordingly.
5347 * Always use this function when completing multiple NCQ commands
5348 * from IRQ handlers instead of calling ata_qc_complete()
5349 * multiple times to keep IRQ expect status properly in sync.
5352 * spin_lock_irqsave(host lock)
5355 * Number of completed commands on success, -errno otherwise.
5357 int ata_qc_complete_multiple(struct ata_port *ap, u64 qc_active)
5362 done_mask = ap->qc_active ^ qc_active;
5364 if (unlikely(done_mask & qc_active)) {
5365 ata_port_err(ap, "illegal qc_active transition (%08llx->%08llx)\n",
5366 ap->qc_active, qc_active);
5371 struct ata_queued_cmd *qc;
5372 unsigned int tag = __ffs64(done_mask);
5374 qc = ata_qc_from_tag(ap, tag);
5376 ata_qc_complete(qc);
5379 done_mask &= ~(1ULL << tag);
5386 * ata_qc_issue - issue taskfile to device
5387 * @qc: command to issue to device
5389 * Prepare an ATA command to submission to device.
5390 * This includes mapping the data into a DMA-able
5391 * area, filling in the S/G table, and finally
5392 * writing the taskfile to hardware, starting the command.
5395 * spin_lock_irqsave(host lock)
5397 void ata_qc_issue(struct ata_queued_cmd *qc)
5399 struct ata_port *ap = qc->ap;
5400 struct ata_link *link = qc->dev->link;
5401 u8 prot = qc->tf.protocol;
5403 /* Make sure only one non-NCQ command is outstanding. The
5404 * check is skipped for old EH because it reuses active qc to
5405 * request ATAPI sense.
5407 WARN_ON_ONCE(ap->ops->error_handler && ata_tag_valid(link->active_tag));
5409 if (ata_is_ncq(prot)) {
5410 WARN_ON_ONCE(link->sactive & (1 << qc->hw_tag));
5413 ap->nr_active_links++;
5414 link->sactive |= 1 << qc->hw_tag;
5416 WARN_ON_ONCE(link->sactive);
5418 ap->nr_active_links++;
5419 link->active_tag = qc->tag;
5422 qc->flags |= ATA_QCFLAG_ACTIVE;
5423 ap->qc_active |= 1ULL << qc->tag;
5426 * We guarantee to LLDs that they will have at least one
5427 * non-zero sg if the command is a data command.
5429 if (ata_is_data(prot) && (!qc->sg || !qc->n_elem || !qc->nbytes))
5432 if (ata_is_dma(prot) || (ata_is_pio(prot) &&
5433 (ap->flags & ATA_FLAG_PIO_DMA)))
5434 if (ata_sg_setup(qc))
5437 /* if device is sleeping, schedule reset and abort the link */
5438 if (unlikely(qc->dev->flags & ATA_DFLAG_SLEEPING)) {
5439 link->eh_info.action |= ATA_EH_RESET;
5440 ata_ehi_push_desc(&link->eh_info, "waking up from sleep");
5441 ata_link_abort(link);
5445 ap->ops->qc_prep(qc);
5446 trace_ata_qc_issue(qc);
5447 qc->err_mask |= ap->ops->qc_issue(qc);
5448 if (unlikely(qc->err_mask))
5453 qc->err_mask |= AC_ERR_SYSTEM;
5455 ata_qc_complete(qc);
5459 * sata_scr_valid - test whether SCRs are accessible
5460 * @link: ATA link to test SCR accessibility for
5462 * Test whether SCRs are accessible for @link.
5468 * 1 if SCRs are accessible, 0 otherwise.
5470 int sata_scr_valid(struct ata_link *link)
5472 struct ata_port *ap = link->ap;
5474 return (ap->flags & ATA_FLAG_SATA) && ap->ops->scr_read;
5478 * sata_scr_read - read SCR register of the specified port
5479 * @link: ATA link to read SCR for
5481 * @val: Place to store read value
5483 * Read SCR register @reg of @link into *@val. This function is
5484 * guaranteed to succeed if @link is ap->link, the cable type of
5485 * the port is SATA and the port implements ->scr_read.
5488 * None if @link is ap->link. Kernel thread context otherwise.
5491 * 0 on success, negative errno on failure.
5493 int sata_scr_read(struct ata_link *link, int reg, u32 *val)
5495 if (ata_is_host_link(link)) {
5496 if (sata_scr_valid(link))
5497 return link->ap->ops->scr_read(link, reg, val);
5501 return sata_pmp_scr_read(link, reg, val);
5505 * sata_scr_write - write SCR register of the specified port
5506 * @link: ATA link to write SCR for
5507 * @reg: SCR to write
5508 * @val: value to write
5510 * Write @val to SCR register @reg of @link. This function is
5511 * guaranteed to succeed if @link is ap->link, the cable type of
5512 * the port is SATA and the port implements ->scr_read.
5515 * None if @link is ap->link. Kernel thread context otherwise.
5518 * 0 on success, negative errno on failure.
5520 int sata_scr_write(struct ata_link *link, int reg, u32 val)
5522 if (ata_is_host_link(link)) {
5523 if (sata_scr_valid(link))
5524 return link->ap->ops->scr_write(link, reg, val);
5528 return sata_pmp_scr_write(link, reg, val);
5532 * sata_scr_write_flush - write SCR register of the specified port and flush
5533 * @link: ATA link to write SCR for
5534 * @reg: SCR to write
5535 * @val: value to write
5537 * This function is identical to sata_scr_write() except that this
5538 * function performs flush after writing to the register.
5541 * None if @link is ap->link. Kernel thread context otherwise.
5544 * 0 on success, negative errno on failure.
5546 int sata_scr_write_flush(struct ata_link *link, int reg, u32 val)
5548 if (ata_is_host_link(link)) {
5551 if (sata_scr_valid(link)) {
5552 rc = link->ap->ops->scr_write(link, reg, val);
5554 rc = link->ap->ops->scr_read(link, reg, &val);
5560 return sata_pmp_scr_write(link, reg, val);
5564 * ata_phys_link_online - test whether the given link is online
5565 * @link: ATA link to test
5567 * Test whether @link is online. Note that this function returns
5568 * 0 if online status of @link cannot be obtained, so
5569 * ata_link_online(link) != !ata_link_offline(link).
5575 * True if the port online status is available and online.
5577 bool ata_phys_link_online(struct ata_link *link)
5581 if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0 &&
5582 ata_sstatus_online(sstatus))
5588 * ata_phys_link_offline - test whether the given link is offline
5589 * @link: ATA link to test
5591 * Test whether @link is offline. Note that this function
5592 * returns 0 if offline status of @link cannot be obtained, so
5593 * ata_link_online(link) != !ata_link_offline(link).
5599 * True if the port offline status is available and offline.
5601 bool ata_phys_link_offline(struct ata_link *link)
5605 if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0 &&
5606 !ata_sstatus_online(sstatus))
5612 * ata_link_online - test whether the given link is online
5613 * @link: ATA link to test
5615 * Test whether @link is online. This is identical to
5616 * ata_phys_link_online() when there's no slave link. When
5617 * there's a slave link, this function should only be called on
5618 * the master link and will return true if any of M/S links is
5625 * True if the port online status is available and online.
5627 bool ata_link_online(struct ata_link *link)
5629 struct ata_link *slave = link->ap->slave_link;
5631 WARN_ON(link == slave); /* shouldn't be called on slave link */
5633 return ata_phys_link_online(link) ||
5634 (slave && ata_phys_link_online(slave));
5638 * ata_link_offline - test whether the given link is offline
5639 * @link: ATA link to test
5641 * Test whether @link is offline. This is identical to
5642 * ata_phys_link_offline() when there's no slave link. When
5643 * there's a slave link, this function should only be called on
5644 * the master link and will return true if both M/S links are
5651 * True if the port offline status is available and offline.
5653 bool ata_link_offline(struct ata_link *link)
5655 struct ata_link *slave = link->ap->slave_link;
5657 WARN_ON(link == slave); /* shouldn't be called on slave link */
5659 return ata_phys_link_offline(link) &&
5660 (!slave || ata_phys_link_offline(slave));
5664 static void ata_port_request_pm(struct ata_port *ap, pm_message_t mesg,
5665 unsigned int action, unsigned int ehi_flags,
5668 struct ata_link *link;
5669 unsigned long flags;
5671 /* Previous resume operation might still be in
5672 * progress. Wait for PM_PENDING to clear.
5674 if (ap->pflags & ATA_PFLAG_PM_PENDING) {
5675 ata_port_wait_eh(ap);
5676 WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING);
5679 /* request PM ops to EH */
5680 spin_lock_irqsave(ap->lock, flags);
5683 ap->pflags |= ATA_PFLAG_PM_PENDING;
5684 ata_for_each_link(link, ap, HOST_FIRST) {
5685 link->eh_info.action |= action;
5686 link->eh_info.flags |= ehi_flags;
5689 ata_port_schedule_eh(ap);
5691 spin_unlock_irqrestore(ap->lock, flags);
5694 ata_port_wait_eh(ap);
5695 WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING);
5700 * On some hardware, device fails to respond after spun down for suspend. As
5701 * the device won't be used before being resumed, we don't need to touch the
5702 * device. Ask EH to skip the usual stuff and proceed directly to suspend.
5704 * http://thread.gmane.org/gmane.linux.ide/46764
5706 static const unsigned int ata_port_suspend_ehi = ATA_EHI_QUIET
5707 | ATA_EHI_NO_AUTOPSY
5708 | ATA_EHI_NO_RECOVERY;
5710 static void ata_port_suspend(struct ata_port *ap, pm_message_t mesg)
5712 ata_port_request_pm(ap, mesg, 0, ata_port_suspend_ehi, false);
5715 static void ata_port_suspend_async(struct ata_port *ap, pm_message_t mesg)
5717 ata_port_request_pm(ap, mesg, 0, ata_port_suspend_ehi, true);
5720 static int ata_port_pm_suspend(struct device *dev)
5722 struct ata_port *ap = to_ata_port(dev);
5724 if (pm_runtime_suspended(dev))
5727 ata_port_suspend(ap, PMSG_SUSPEND);
5731 static int ata_port_pm_freeze(struct device *dev)
5733 struct ata_port *ap = to_ata_port(dev);
5735 if (pm_runtime_suspended(dev))
5738 ata_port_suspend(ap, PMSG_FREEZE);
5742 static int ata_port_pm_poweroff(struct device *dev)
5744 ata_port_suspend(to_ata_port(dev), PMSG_HIBERNATE);
5748 static const unsigned int ata_port_resume_ehi = ATA_EHI_NO_AUTOPSY
5751 static void ata_port_resume(struct ata_port *ap, pm_message_t mesg)
5753 ata_port_request_pm(ap, mesg, ATA_EH_RESET, ata_port_resume_ehi, false);
5756 static void ata_port_resume_async(struct ata_port *ap, pm_message_t mesg)
5758 ata_port_request_pm(ap, mesg, ATA_EH_RESET, ata_port_resume_ehi, true);
5761 static int ata_port_pm_resume(struct device *dev)
5763 ata_port_resume_async(to_ata_port(dev), PMSG_RESUME);
5764 pm_runtime_disable(dev);
5765 pm_runtime_set_active(dev);
5766 pm_runtime_enable(dev);
5771 * For ODDs, the upper layer will poll for media change every few seconds,
5772 * which will make it enter and leave suspend state every few seconds. And
5773 * as each suspend will cause a hard/soft reset, the gain of runtime suspend
5774 * is very little and the ODD may malfunction after constantly being reset.
5775 * So the idle callback here will not proceed to suspend if a non-ZPODD capable
5776 * ODD is attached to the port.
5778 static int ata_port_runtime_idle(struct device *dev)
5780 struct ata_port *ap = to_ata_port(dev);
5781 struct ata_link *link;
5782 struct ata_device *adev;
5784 ata_for_each_link(link, ap, HOST_FIRST) {
5785 ata_for_each_dev(adev, link, ENABLED)
5786 if (adev->class == ATA_DEV_ATAPI &&
5787 !zpodd_dev_enabled(adev))
5794 static int ata_port_runtime_suspend(struct device *dev)
5796 ata_port_suspend(to_ata_port(dev), PMSG_AUTO_SUSPEND);
5800 static int ata_port_runtime_resume(struct device *dev)
5802 ata_port_resume(to_ata_port(dev), PMSG_AUTO_RESUME);
5806 static const struct dev_pm_ops ata_port_pm_ops = {
5807 .suspend = ata_port_pm_suspend,
5808 .resume = ata_port_pm_resume,
5809 .freeze = ata_port_pm_freeze,
5810 .thaw = ata_port_pm_resume,
5811 .poweroff = ata_port_pm_poweroff,
5812 .restore = ata_port_pm_resume,
5814 .runtime_suspend = ata_port_runtime_suspend,
5815 .runtime_resume = ata_port_runtime_resume,
5816 .runtime_idle = ata_port_runtime_idle,
5819 /* sas ports don't participate in pm runtime management of ata_ports,
5820 * and need to resume ata devices at the domain level, not the per-port
5821 * level. sas suspend/resume is async to allow parallel port recovery
5822 * since sas has multiple ata_port instances per Scsi_Host.
5824 void ata_sas_port_suspend(struct ata_port *ap)
5826 ata_port_suspend_async(ap, PMSG_SUSPEND);
5828 EXPORT_SYMBOL_GPL(ata_sas_port_suspend);
5830 void ata_sas_port_resume(struct ata_port *ap)
5832 ata_port_resume_async(ap, PMSG_RESUME);
5834 EXPORT_SYMBOL_GPL(ata_sas_port_resume);
5837 * ata_host_suspend - suspend host
5838 * @host: host to suspend
5841 * Suspend @host. Actual operation is performed by port suspend.
5843 int ata_host_suspend(struct ata_host *host, pm_message_t mesg)
5845 host->dev->power.power_state = mesg;
5850 * ata_host_resume - resume host
5851 * @host: host to resume
5853 * Resume @host. Actual operation is performed by port resume.
5855 void ata_host_resume(struct ata_host *host)
5857 host->dev->power.power_state = PMSG_ON;
5861 const struct device_type ata_port_type = {
5864 .pm = &ata_port_pm_ops,
5869 * ata_dev_init - Initialize an ata_device structure
5870 * @dev: Device structure to initialize
5872 * Initialize @dev in preparation for probing.
5875 * Inherited from caller.
5877 void ata_dev_init(struct ata_device *dev)
5879 struct ata_link *link = ata_dev_phys_link(dev);
5880 struct ata_port *ap = link->ap;
5881 unsigned long flags;
5883 /* SATA spd limit is bound to the attached device, reset together */
5884 link->sata_spd_limit = link->hw_sata_spd_limit;
5887 /* High bits of dev->flags are used to record warm plug
5888 * requests which occur asynchronously. Synchronize using
5891 spin_lock_irqsave(ap->lock, flags);
5892 dev->flags &= ~ATA_DFLAG_INIT_MASK;
5894 spin_unlock_irqrestore(ap->lock, flags);
5896 memset((void *)dev + ATA_DEVICE_CLEAR_BEGIN, 0,
5897 ATA_DEVICE_CLEAR_END - ATA_DEVICE_CLEAR_BEGIN);
5898 dev->pio_mask = UINT_MAX;
5899 dev->mwdma_mask = UINT_MAX;
5900 dev->udma_mask = UINT_MAX;
5904 * ata_link_init - Initialize an ata_link structure
5905 * @ap: ATA port link is attached to
5906 * @link: Link structure to initialize
5907 * @pmp: Port multiplier port number
5912 * Kernel thread context (may sleep)
5914 void ata_link_init(struct ata_port *ap, struct ata_link *link, int pmp)
5918 /* clear everything except for devices */
5919 memset((void *)link + ATA_LINK_CLEAR_BEGIN, 0,
5920 ATA_LINK_CLEAR_END - ATA_LINK_CLEAR_BEGIN);
5924 link->active_tag = ATA_TAG_POISON;
5925 link->hw_sata_spd_limit = UINT_MAX;
5927 /* can't use iterator, ap isn't initialized yet */
5928 for (i = 0; i < ATA_MAX_DEVICES; i++) {
5929 struct ata_device *dev = &link->device[i];
5932 dev->devno = dev - link->device;
5933 #ifdef CONFIG_ATA_ACPI
5934 dev->gtf_filter = ata_acpi_gtf_filter;
5941 * sata_link_init_spd - Initialize link->sata_spd_limit
5942 * @link: Link to configure sata_spd_limit for
5944 * Initialize @link->[hw_]sata_spd_limit to the currently
5948 * Kernel thread context (may sleep).
5951 * 0 on success, -errno on failure.
5953 int sata_link_init_spd(struct ata_link *link)
5958 rc = sata_scr_read(link, SCR_CONTROL, &link->saved_scontrol);
5962 spd = (link->saved_scontrol >> 4) & 0xf;
5964 link->hw_sata_spd_limit &= (1 << spd) - 1;
5966 ata_force_link_limits(link);
5968 link->sata_spd_limit = link->hw_sata_spd_limit;
5974 * ata_port_alloc - allocate and initialize basic ATA port resources
5975 * @host: ATA host this allocated port belongs to
5977 * Allocate and initialize basic ATA port resources.
5980 * Allocate ATA port on success, NULL on failure.
5983 * Inherited from calling layer (may sleep).
5985 struct ata_port *ata_port_alloc(struct ata_host *host)
5987 struct ata_port *ap;
5991 ap = kzalloc(sizeof(*ap), GFP_KERNEL);
5995 ap->pflags |= ATA_PFLAG_INITIALIZING | ATA_PFLAG_FROZEN;
5996 ap->lock = &host->lock;
5998 ap->local_port_no = -1;
6000 ap->dev = host->dev;
6002 #if defined(ATA_VERBOSE_DEBUG)
6003 /* turn on all debugging levels */
6004 ap->msg_enable = 0x00FF;
6005 #elif defined(ATA_DEBUG)
6006 ap->msg_enable = ATA_MSG_DRV | ATA_MSG_INFO | ATA_MSG_CTL | ATA_MSG_WARN | ATA_MSG_ERR;
6008 ap->msg_enable = ATA_MSG_DRV | ATA_MSG_ERR | ATA_MSG_WARN;
6011 mutex_init(&ap->scsi_scan_mutex);
6012 INIT_DELAYED_WORK(&ap->hotplug_task, ata_scsi_hotplug);
6013 INIT_WORK(&ap->scsi_rescan_task, ata_scsi_dev_rescan);
6014 INIT_LIST_HEAD(&ap->eh_done_q);
6015 init_waitqueue_head(&ap->eh_wait_q);
6016 init_completion(&ap->park_req_pending);
6017 timer_setup(&ap->fastdrain_timer, ata_eh_fastdrain_timerfn,
6020 ap->cbl = ATA_CBL_NONE;
6022 ata_link_init(ap, &ap->link, 0);
6025 ap->stats.unhandled_irq = 1;
6026 ap->stats.idle_irq = 1;
6028 ata_sff_port_init(ap);
6033 static void ata_devres_release(struct device *gendev, void *res)
6035 struct ata_host *host = dev_get_drvdata(gendev);
6038 for (i = 0; i < host->n_ports; i++) {
6039 struct ata_port *ap = host->ports[i];
6045 scsi_host_put(ap->scsi_host);
6049 dev_set_drvdata(gendev, NULL);
6053 static void ata_host_release(struct kref *kref)
6055 struct ata_host *host = container_of(kref, struct ata_host, kref);
6058 for (i = 0; i < host->n_ports; i++) {
6059 struct ata_port *ap = host->ports[i];
6061 kfree(ap->pmp_link);
6062 kfree(ap->slave_link);
6064 host->ports[i] = NULL;
6069 void ata_host_get(struct ata_host *host)
6071 kref_get(&host->kref);
6074 void ata_host_put(struct ata_host *host)
6076 kref_put(&host->kref, ata_host_release);
6080 * ata_host_alloc - allocate and init basic ATA host resources
6081 * @dev: generic device this host is associated with
6082 * @max_ports: maximum number of ATA ports associated with this host
6084 * Allocate and initialize basic ATA host resources. LLD calls
6085 * this function to allocate a host, initializes it fully and
6086 * attaches it using ata_host_register().
6088 * @max_ports ports are allocated and host->n_ports is
6089 * initialized to @max_ports. The caller is allowed to decrease
6090 * host->n_ports before calling ata_host_register(). The unused
6091 * ports will be automatically freed on registration.
6094 * Allocate ATA host on success, NULL on failure.
6097 * Inherited from calling layer (may sleep).
6099 struct ata_host *ata_host_alloc(struct device *dev, int max_ports)
6101 struct ata_host *host;
6108 /* alloc a container for our list of ATA ports (buses) */
6109 sz = sizeof(struct ata_host) + (max_ports + 1) * sizeof(void *);
6110 host = kzalloc(sz, GFP_KERNEL);
6114 if (!devres_open_group(dev, NULL, GFP_KERNEL))
6117 dr = devres_alloc(ata_devres_release, 0, GFP_KERNEL);
6121 devres_add(dev, dr);
6122 dev_set_drvdata(dev, host);
6124 spin_lock_init(&host->lock);
6125 mutex_init(&host->eh_mutex);
6127 host->n_ports = max_ports;
6128 kref_init(&host->kref);
6130 /* allocate ports bound to this host */
6131 for (i = 0; i < max_ports; i++) {
6132 struct ata_port *ap;
6134 ap = ata_port_alloc(host);
6139 host->ports[i] = ap;
6142 devres_remove_group(dev, NULL);
6146 devres_release_group(dev, NULL);
6153 * ata_host_alloc_pinfo - alloc host and init with port_info array
6154 * @dev: generic device this host is associated with
6155 * @ppi: array of ATA port_info to initialize host with
6156 * @n_ports: number of ATA ports attached to this host
6158 * Allocate ATA host and initialize with info from @ppi. If NULL
6159 * terminated, @ppi may contain fewer entries than @n_ports. The
6160 * last entry will be used for the remaining ports.
6163 * Allocate ATA host on success, NULL on failure.
6166 * Inherited from calling layer (may sleep).
6168 struct ata_host *ata_host_alloc_pinfo(struct device *dev,
6169 const struct ata_port_info * const * ppi,
6172 const struct ata_port_info *pi;
6173 struct ata_host *host;
6176 host = ata_host_alloc(dev, n_ports);
6180 for (i = 0, j = 0, pi = NULL; i < host->n_ports; i++) {
6181 struct ata_port *ap = host->ports[i];
6186 ap->pio_mask = pi->pio_mask;
6187 ap->mwdma_mask = pi->mwdma_mask;
6188 ap->udma_mask = pi->udma_mask;
6189 ap->flags |= pi->flags;
6190 ap->link.flags |= pi->link_flags;
6191 ap->ops = pi->port_ops;
6193 if (!host->ops && (pi->port_ops != &ata_dummy_port_ops))
6194 host->ops = pi->port_ops;
6201 * ata_slave_link_init - initialize slave link
6202 * @ap: port to initialize slave link for
6204 * Create and initialize slave link for @ap. This enables slave
6205 * link handling on the port.
6207 * In libata, a port contains links and a link contains devices.
6208 * There is single host link but if a PMP is attached to it,
6209 * there can be multiple fan-out links. On SATA, there's usually
6210 * a single device connected to a link but PATA and SATA
6211 * controllers emulating TF based interface can have two - master
6214 * However, there are a few controllers which don't fit into this
6215 * abstraction too well - SATA controllers which emulate TF
6216 * interface with both master and slave devices but also have
6217 * separate SCR register sets for each device. These controllers
6218 * need separate links for physical link handling
6219 * (e.g. onlineness, link speed) but should be treated like a
6220 * traditional M/S controller for everything else (e.g. command
6221 * issue, softreset).
6223 * slave_link is libata's way of handling this class of
6224 * controllers without impacting core layer too much. For
6225 * anything other than physical link handling, the default host
6226 * link is used for both master and slave. For physical link
6227 * handling, separate @ap->slave_link is used. All dirty details
6228 * are implemented inside libata core layer. From LLD's POV, the
6229 * only difference is that prereset, hardreset and postreset are
6230 * called once more for the slave link, so the reset sequence
6231 * looks like the following.
6233 * prereset(M) -> prereset(S) -> hardreset(M) -> hardreset(S) ->
6234 * softreset(M) -> postreset(M) -> postreset(S)
6236 * Note that softreset is called only for the master. Softreset
6237 * resets both M/S by definition, so SRST on master should handle
6238 * both (the standard method will work just fine).
6241 * Should be called before host is registered.
6244 * 0 on success, -errno on failure.
6246 int ata_slave_link_init(struct ata_port *ap)
6248 struct ata_link *link;
6250 WARN_ON(ap->slave_link);
6251 WARN_ON(ap->flags & ATA_FLAG_PMP);
6253 link = kzalloc(sizeof(*link), GFP_KERNEL);
6257 ata_link_init(ap, link, 1);
6258 ap->slave_link = link;
6262 static void ata_host_stop(struct device *gendev, void *res)
6264 struct ata_host *host = dev_get_drvdata(gendev);
6267 WARN_ON(!(host->flags & ATA_HOST_STARTED));
6269 for (i = 0; i < host->n_ports; i++) {
6270 struct ata_port *ap = host->ports[i];
6272 if (ap->ops->port_stop)
6273 ap->ops->port_stop(ap);
6276 if (host->ops->host_stop)
6277 host->ops->host_stop(host);
6281 * ata_finalize_port_ops - finalize ata_port_operations
6282 * @ops: ata_port_operations to finalize
6284 * An ata_port_operations can inherit from another ops and that
6285 * ops can again inherit from another. This can go on as many
6286 * times as necessary as long as there is no loop in the
6287 * inheritance chain.
6289 * Ops tables are finalized when the host is started. NULL or
6290 * unspecified entries are inherited from the closet ancestor
6291 * which has the method and the entry is populated with it.
6292 * After finalization, the ops table directly points to all the
6293 * methods and ->inherits is no longer necessary and cleared.
6295 * Using ATA_OP_NULL, inheriting ops can force a method to NULL.
6300 static void ata_finalize_port_ops(struct ata_port_operations *ops)
6302 static DEFINE_SPINLOCK(lock);
6303 const struct ata_port_operations *cur;
6304 void **begin = (void **)ops;
6305 void **end = (void **)&ops->inherits;
6308 if (!ops || !ops->inherits)
6313 for (cur = ops->inherits; cur; cur = cur->inherits) {
6314 void **inherit = (void **)cur;
6316 for (pp = begin; pp < end; pp++, inherit++)
6321 for (pp = begin; pp < end; pp++)
6325 ops->inherits = NULL;
6331 * ata_host_start - start and freeze ports of an ATA host
6332 * @host: ATA host to start ports for
6334 * Start and then freeze ports of @host. Started status is
6335 * recorded in host->flags, so this function can be called
6336 * multiple times. Ports are guaranteed to get started only
6337 * once. If host->ops isn't initialized yet, its set to the
6338 * first non-dummy port ops.
6341 * Inherited from calling layer (may sleep).
6344 * 0 if all ports are started successfully, -errno otherwise.
6346 int ata_host_start(struct ata_host *host)
6349 void *start_dr = NULL;
6352 if (host->flags & ATA_HOST_STARTED)
6355 ata_finalize_port_ops(host->ops);
6357 for (i = 0; i < host->n_ports; i++) {
6358 struct ata_port *ap = host->ports[i];
6360 ata_finalize_port_ops(ap->ops);
6362 if (!host->ops && !ata_port_is_dummy(ap))
6363 host->ops = ap->ops;
6365 if (ap->ops->port_stop)
6369 if (host->ops->host_stop)
6373 start_dr = devres_alloc(ata_host_stop, 0, GFP_KERNEL);
6378 for (i = 0; i < host->n_ports; i++) {
6379 struct ata_port *ap = host->ports[i];
6381 if (ap->ops->port_start) {
6382 rc = ap->ops->port_start(ap);
6386 "failed to start port %d (errno=%d)\n",
6391 ata_eh_freeze_port(ap);
6395 devres_add(host->dev, start_dr);
6396 host->flags |= ATA_HOST_STARTED;
6401 struct ata_port *ap = host->ports[i];
6403 if (ap->ops->port_stop)
6404 ap->ops->port_stop(ap);
6406 devres_free(start_dr);
6411 * ata_sas_host_init - Initialize a host struct for sas (ipr, libsas)
6412 * @host: host to initialize
6413 * @dev: device host is attached to
6417 void ata_host_init(struct ata_host *host, struct device *dev,
6418 struct ata_port_operations *ops)
6420 spin_lock_init(&host->lock);
6421 mutex_init(&host->eh_mutex);
6422 host->n_tags = ATA_MAX_QUEUE;
6427 void __ata_port_probe(struct ata_port *ap)
6429 struct ata_eh_info *ehi = &ap->link.eh_info;
6430 unsigned long flags;
6432 /* kick EH for boot probing */
6433 spin_lock_irqsave(ap->lock, flags);
6435 ehi->probe_mask |= ATA_ALL_DEVICES;
6436 ehi->action |= ATA_EH_RESET;
6437 ehi->flags |= ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET;
6439 ap->pflags &= ~ATA_PFLAG_INITIALIZING;
6440 ap->pflags |= ATA_PFLAG_LOADING;
6441 ata_port_schedule_eh(ap);
6443 spin_unlock_irqrestore(ap->lock, flags);
6446 int ata_port_probe(struct ata_port *ap)
6450 if (ap->ops->error_handler) {
6451 __ata_port_probe(ap);
6452 ata_port_wait_eh(ap);
6454 DPRINTK("ata%u: bus probe begin\n", ap->print_id);
6455 rc = ata_bus_probe(ap);
6456 DPRINTK("ata%u: bus probe end\n", ap->print_id);
6462 static void async_port_probe(void *data, async_cookie_t cookie)
6464 struct ata_port *ap = data;
6467 * If we're not allowed to scan this host in parallel,
6468 * we need to wait until all previous scans have completed
6469 * before going further.
6470 * Jeff Garzik says this is only within a controller, so we
6471 * don't need to wait for port 0, only for later ports.
6473 if (!(ap->host->flags & ATA_HOST_PARALLEL_SCAN) && ap->port_no != 0)
6474 async_synchronize_cookie(cookie);
6476 (void)ata_port_probe(ap);
6478 /* in order to keep device order, we need to synchronize at this point */
6479 async_synchronize_cookie(cookie);
6481 ata_scsi_scan_host(ap, 1);
6485 * ata_host_register - register initialized ATA host
6486 * @host: ATA host to register
6487 * @sht: template for SCSI host
6489 * Register initialized ATA host. @host is allocated using
6490 * ata_host_alloc() and fully initialized by LLD. This function
6491 * starts ports, registers @host with ATA and SCSI layers and
6492 * probe registered devices.
6495 * Inherited from calling layer (may sleep).
6498 * 0 on success, -errno otherwise.
6500 int ata_host_register(struct ata_host *host, struct scsi_host_template *sht)
6504 host->n_tags = clamp(sht->can_queue, 1, ATA_MAX_QUEUE);
6506 /* host must have been started */
6507 if (!(host->flags & ATA_HOST_STARTED)) {
6508 dev_err(host->dev, "BUG: trying to register unstarted host\n");
6513 /* Blow away unused ports. This happens when LLD can't
6514 * determine the exact number of ports to allocate at
6517 for (i = host->n_ports; host->ports[i]; i++)
6518 kfree(host->ports[i]);
6520 /* give ports names and add SCSI hosts */
6521 for (i = 0; i < host->n_ports; i++) {
6522 host->ports[i]->print_id = atomic_inc_return(&ata_print_id);
6523 host->ports[i]->local_port_no = i + 1;
6526 /* Create associated sysfs transport objects */
6527 for (i = 0; i < host->n_ports; i++) {
6528 rc = ata_tport_add(host->dev,host->ports[i]);
6534 rc = ata_scsi_add_hosts(host, sht);
6538 /* set cable, sata_spd_limit and report */
6539 for (i = 0; i < host->n_ports; i++) {
6540 struct ata_port *ap = host->ports[i];
6541 unsigned long xfer_mask;
6543 /* set SATA cable type if still unset */
6544 if (ap->cbl == ATA_CBL_NONE && (ap->flags & ATA_FLAG_SATA))
6545 ap->cbl = ATA_CBL_SATA;
6547 /* init sata_spd_limit to the current value */
6548 sata_link_init_spd(&ap->link);
6550 sata_link_init_spd(ap->slave_link);
6552 /* print per-port info to dmesg */
6553 xfer_mask = ata_pack_xfermask(ap->pio_mask, ap->mwdma_mask,
6556 if (!ata_port_is_dummy(ap)) {
6557 ata_port_info(ap, "%cATA max %s %s\n",
6558 (ap->flags & ATA_FLAG_SATA) ? 'S' : 'P',
6559 ata_mode_string(xfer_mask),
6560 ap->link.eh_info.desc);
6561 ata_ehi_clear_desc(&ap->link.eh_info);
6563 ata_port_info(ap, "DUMMY\n");
6566 /* perform each probe asynchronously */
6567 for (i = 0; i < host->n_ports; i++) {
6568 struct ata_port *ap = host->ports[i];
6569 async_schedule(async_port_probe, ap);
6576 ata_tport_delete(host->ports[i]);
6583 * ata_host_activate - start host, request IRQ and register it
6584 * @host: target ATA host
6585 * @irq: IRQ to request
6586 * @irq_handler: irq_handler used when requesting IRQ
6587 * @irq_flags: irq_flags used when requesting IRQ
6588 * @sht: scsi_host_template to use when registering the host
6590 * After allocating an ATA host and initializing it, most libata
6591 * LLDs perform three steps to activate the host - start host,
6592 * request IRQ and register it. This helper takes necessary
6593 * arguments and performs the three steps in one go.
6595 * An invalid IRQ skips the IRQ registration and expects the host to
6596 * have set polling mode on the port. In this case, @irq_handler
6600 * Inherited from calling layer (may sleep).
6603 * 0 on success, -errno otherwise.
6605 int ata_host_activate(struct ata_host *host, int irq,
6606 irq_handler_t irq_handler, unsigned long irq_flags,
6607 struct scsi_host_template *sht)
6612 rc = ata_host_start(host);
6616 /* Special case for polling mode */
6618 WARN_ON(irq_handler);
6619 return ata_host_register(host, sht);
6622 irq_desc = devm_kasprintf(host->dev, GFP_KERNEL, "%s[%s]",
6623 dev_driver_string(host->dev),
6624 dev_name(host->dev));
6628 rc = devm_request_irq(host->dev, irq, irq_handler, irq_flags,
6633 for (i = 0; i < host->n_ports; i++)
6634 ata_port_desc(host->ports[i], "irq %d", irq);
6636 rc = ata_host_register(host, sht);
6637 /* if failed, just free the IRQ and leave ports alone */
6639 devm_free_irq(host->dev, irq, host);
6645 * ata_port_detach - Detach ATA port in preparation of device removal
6646 * @ap: ATA port to be detached
6648 * Detach all ATA devices and the associated SCSI devices of @ap;
6649 * then, remove the associated SCSI host. @ap is guaranteed to
6650 * be quiescent on return from this function.
6653 * Kernel thread context (may sleep).
6655 static void ata_port_detach(struct ata_port *ap)
6657 unsigned long flags;
6658 struct ata_link *link;
6659 struct ata_device *dev;
6661 if (!ap->ops->error_handler)
6664 /* tell EH we're leaving & flush EH */
6665 spin_lock_irqsave(ap->lock, flags);
6666 ap->pflags |= ATA_PFLAG_UNLOADING;
6667 ata_port_schedule_eh(ap);
6668 spin_unlock_irqrestore(ap->lock, flags);
6670 /* wait till EH commits suicide */
6671 ata_port_wait_eh(ap);
6673 /* it better be dead now */
6674 WARN_ON(!(ap->pflags & ATA_PFLAG_UNLOADED));
6676 cancel_delayed_work_sync(&ap->hotplug_task);
6679 /* clean up zpodd on port removal */
6680 ata_for_each_link(link, ap, HOST_FIRST) {
6681 ata_for_each_dev(dev, link, ALL) {
6682 if (zpodd_dev_enabled(dev))
6688 for (i = 0; i < SATA_PMP_MAX_PORTS; i++)
6689 ata_tlink_delete(&ap->pmp_link[i]);
6691 /* remove the associated SCSI host */
6692 scsi_remove_host(ap->scsi_host);
6693 ata_tport_delete(ap);
6697 * ata_host_detach - Detach all ports of an ATA host
6698 * @host: Host to detach
6700 * Detach all ports of @host.
6703 * Kernel thread context (may sleep).
6705 void ata_host_detach(struct ata_host *host)
6709 for (i = 0; i < host->n_ports; i++)
6710 ata_port_detach(host->ports[i]);
6712 /* the host is dead now, dissociate ACPI */
6713 ata_acpi_dissociate(host);
6719 * ata_pci_remove_one - PCI layer callback for device removal
6720 * @pdev: PCI device that was removed
6722 * PCI layer indicates to libata via this hook that hot-unplug or
6723 * module unload event has occurred. Detach all ports. Resource
6724 * release is handled via devres.
6727 * Inherited from PCI layer (may sleep).
6729 void ata_pci_remove_one(struct pci_dev *pdev)
6731 struct ata_host *host = pci_get_drvdata(pdev);
6733 ata_host_detach(host);
6736 /* move to PCI subsystem */
6737 int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits)
6739 unsigned long tmp = 0;
6741 switch (bits->width) {
6744 pci_read_config_byte(pdev, bits->reg, &tmp8);
6750 pci_read_config_word(pdev, bits->reg, &tmp16);
6756 pci_read_config_dword(pdev, bits->reg, &tmp32);
6767 return (tmp == bits->val) ? 1 : 0;
6771 void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg)
6773 pci_save_state(pdev);
6774 pci_disable_device(pdev);
6776 if (mesg.event & PM_EVENT_SLEEP)
6777 pci_set_power_state(pdev, PCI_D3hot);
6780 int ata_pci_device_do_resume(struct pci_dev *pdev)
6784 pci_set_power_state(pdev, PCI_D0);
6785 pci_restore_state(pdev);
6787 rc = pcim_enable_device(pdev);
6790 "failed to enable device after resume (%d)\n", rc);
6794 pci_set_master(pdev);
6798 int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg)
6800 struct ata_host *host = pci_get_drvdata(pdev);
6803 rc = ata_host_suspend(host, mesg);
6807 ata_pci_device_do_suspend(pdev, mesg);
6812 int ata_pci_device_resume(struct pci_dev *pdev)
6814 struct ata_host *host = pci_get_drvdata(pdev);
6817 rc = ata_pci_device_do_resume(pdev);
6819 ata_host_resume(host);
6822 #endif /* CONFIG_PM */
6824 #endif /* CONFIG_PCI */
6827 * ata_platform_remove_one - Platform layer callback for device removal
6828 * @pdev: Platform device that was removed
6830 * Platform layer indicates to libata via this hook that hot-unplug or
6831 * module unload event has occurred. Detach all ports. Resource
6832 * release is handled via devres.
6835 * Inherited from platform layer (may sleep).
6837 int ata_platform_remove_one(struct platform_device *pdev)
6839 struct ata_host *host = platform_get_drvdata(pdev);
6841 ata_host_detach(host);
6846 static int __init ata_parse_force_one(char **cur,
6847 struct ata_force_ent *force_ent,
6848 const char **reason)
6850 static const struct ata_force_param force_tbl[] __initconst = {
6851 { "40c", .cbl = ATA_CBL_PATA40 },
6852 { "80c", .cbl = ATA_CBL_PATA80 },
6853 { "short40c", .cbl = ATA_CBL_PATA40_SHORT },
6854 { "unk", .cbl = ATA_CBL_PATA_UNK },
6855 { "ign", .cbl = ATA_CBL_PATA_IGN },
6856 { "sata", .cbl = ATA_CBL_SATA },
6857 { "1.5Gbps", .spd_limit = 1 },
6858 { "3.0Gbps", .spd_limit = 2 },
6859 { "noncq", .horkage_on = ATA_HORKAGE_NONCQ },
6860 { "ncq", .horkage_off = ATA_HORKAGE_NONCQ },
6861 { "noncqtrim", .horkage_on = ATA_HORKAGE_NO_NCQ_TRIM },
6862 { "ncqtrim", .horkage_off = ATA_HORKAGE_NO_NCQ_TRIM },
6863 { "dump_id", .horkage_on = ATA_HORKAGE_DUMP_ID },
6864 { "pio0", .xfer_mask = 1 << (ATA_SHIFT_PIO + 0) },
6865 { "pio1", .xfer_mask = 1 << (ATA_SHIFT_PIO + 1) },
6866 { "pio2", .xfer_mask = 1 << (ATA_SHIFT_PIO + 2) },
6867 { "pio3", .xfer_mask = 1 << (ATA_SHIFT_PIO + 3) },
6868 { "pio4", .xfer_mask = 1 << (ATA_SHIFT_PIO + 4) },
6869 { "pio5", .xfer_mask = 1 << (ATA_SHIFT_PIO + 5) },
6870 { "pio6", .xfer_mask = 1 << (ATA_SHIFT_PIO + 6) },
6871 { "mwdma0", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 0) },
6872 { "mwdma1", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 1) },
6873 { "mwdma2", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 2) },
6874 { "mwdma3", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 3) },
6875 { "mwdma4", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 4) },
6876 { "udma0", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 0) },
6877 { "udma16", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 0) },
6878 { "udma/16", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 0) },
6879 { "udma1", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 1) },
6880 { "udma25", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 1) },
6881 { "udma/25", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 1) },
6882 { "udma2", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 2) },
6883 { "udma33", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 2) },
6884 { "udma/33", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 2) },
6885 { "udma3", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 3) },
6886 { "udma44", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 3) },
6887 { "udma/44", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 3) },
6888 { "udma4", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 4) },
6889 { "udma66", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 4) },
6890 { "udma/66", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 4) },
6891 { "udma5", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 5) },
6892 { "udma100", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 5) },
6893 { "udma/100", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 5) },
6894 { "udma6", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 6) },
6895 { "udma133", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 6) },
6896 { "udma/133", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 6) },
6897 { "udma7", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 7) },
6898 { "nohrst", .lflags = ATA_LFLAG_NO_HRST },
6899 { "nosrst", .lflags = ATA_LFLAG_NO_SRST },
6900 { "norst", .lflags = ATA_LFLAG_NO_HRST | ATA_LFLAG_NO_SRST },
6901 { "rstonce", .lflags = ATA_LFLAG_RST_ONCE },
6902 { "atapi_dmadir", .horkage_on = ATA_HORKAGE_ATAPI_DMADIR },
6903 { "disable", .horkage_on = ATA_HORKAGE_DISABLE },
6905 char *start = *cur, *p = *cur;
6906 char *id, *val, *endp;
6907 const struct ata_force_param *match_fp = NULL;
6908 int nr_matches = 0, i;
6910 /* find where this param ends and update *cur */
6911 while (*p != '\0' && *p != ',')
6922 p = strchr(start, ':');
6924 val = strstrip(start);
6929 id = strstrip(start);
6930 val = strstrip(p + 1);
6933 p = strchr(id, '.');
6936 force_ent->device = simple_strtoul(p, &endp, 10);
6937 if (p == endp || *endp != '\0') {
6938 *reason = "invalid device";
6943 force_ent->port = simple_strtoul(id, &endp, 10);
6944 if (id == endp || *endp != '\0') {
6945 *reason = "invalid port/link";
6950 /* parse val, allow shortcuts so that both 1.5 and 1.5Gbps work */
6951 for (i = 0; i < ARRAY_SIZE(force_tbl); i++) {
6952 const struct ata_force_param *fp = &force_tbl[i];
6954 if (strncasecmp(val, fp->name, strlen(val)))
6960 if (strcasecmp(val, fp->name) == 0) {
6967 *reason = "unknown value";
6970 if (nr_matches > 1) {
6971 *reason = "ambiguous value";
6975 force_ent->param = *match_fp;
6980 static void __init ata_parse_force_param(void)
6982 int idx = 0, size = 1;
6983 int last_port = -1, last_device = -1;
6984 char *p, *cur, *next;
6986 /* calculate maximum number of params and allocate force_tbl */
6987 for (p = ata_force_param_buf; *p; p++)
6991 ata_force_tbl = kcalloc(size, sizeof(ata_force_tbl[0]), GFP_KERNEL);
6992 if (!ata_force_tbl) {
6993 printk(KERN_WARNING "ata: failed to extend force table, "
6994 "libata.force ignored\n");
6998 /* parse and populate the table */
6999 for (cur = ata_force_param_buf; *cur != '\0'; cur = next) {
7000 const char *reason = "";
7001 struct ata_force_ent te = { .port = -1, .device = -1 };
7004 if (ata_parse_force_one(&next, &te, &reason)) {
7005 printk(KERN_WARNING "ata: failed to parse force "
7006 "parameter \"%s\" (%s)\n",
7011 if (te.port == -1) {
7012 te.port = last_port;
7013 te.device = last_device;
7016 ata_force_tbl[idx++] = te;
7018 last_port = te.port;
7019 last_device = te.device;
7022 ata_force_tbl_size = idx;
7025 static int __init ata_init(void)
7029 ata_parse_force_param();
7031 rc = ata_sff_init();
7033 kfree(ata_force_tbl);
7037 libata_transport_init();
7038 ata_scsi_transport_template = ata_attach_transport();
7039 if (!ata_scsi_transport_template) {
7045 printk(KERN_DEBUG "libata version " DRV_VERSION " loaded.\n");
7052 static void __exit ata_exit(void)
7054 ata_release_transport(ata_scsi_transport_template);
7055 libata_transport_exit();
7057 kfree(ata_force_tbl);
7060 subsys_initcall(ata_init);
7061 module_exit(ata_exit);
7063 static DEFINE_RATELIMIT_STATE(ratelimit, HZ / 5, 1);
7065 int ata_ratelimit(void)
7067 return __ratelimit(&ratelimit);
7071 * ata_msleep - ATA EH owner aware msleep
7072 * @ap: ATA port to attribute the sleep to
7073 * @msecs: duration to sleep in milliseconds
7075 * Sleeps @msecs. If the current task is owner of @ap's EH, the
7076 * ownership is released before going to sleep and reacquired
7077 * after the sleep is complete. IOW, other ports sharing the
7078 * @ap->host will be allowed to own the EH while this task is
7084 void ata_msleep(struct ata_port *ap, unsigned int msecs)
7086 bool owns_eh = ap && ap->host->eh_owner == current;
7092 unsigned long usecs = msecs * USEC_PER_MSEC;
7093 usleep_range(usecs, usecs + 50);
7103 * ata_wait_register - wait until register value changes
7104 * @ap: ATA port to wait register for, can be NULL
7105 * @reg: IO-mapped register
7106 * @mask: Mask to apply to read register value
7107 * @val: Wait condition
7108 * @interval: polling interval in milliseconds
7109 * @timeout: timeout in milliseconds
7111 * Waiting for some bits of register to change is a common
7112 * operation for ATA controllers. This function reads 32bit LE
7113 * IO-mapped register @reg and tests for the following condition.
7115 * (*@reg & mask) != val
7117 * If the condition is met, it returns; otherwise, the process is
7118 * repeated after @interval_msec until timeout.
7121 * Kernel thread context (may sleep)
7124 * The final register value.
7126 u32 ata_wait_register(struct ata_port *ap, void __iomem *reg, u32 mask, u32 val,
7127 unsigned long interval, unsigned long timeout)
7129 unsigned long deadline;
7132 tmp = ioread32(reg);
7134 /* Calculate timeout _after_ the first read to make sure
7135 * preceding writes reach the controller before starting to
7136 * eat away the timeout.
7138 deadline = ata_deadline(jiffies, timeout);
7140 while ((tmp & mask) == val && time_before(jiffies, deadline)) {
7141 ata_msleep(ap, interval);
7142 tmp = ioread32(reg);
7149 * sata_lpm_ignore_phy_events - test if PHY event should be ignored
7150 * @link: Link receiving the event
7152 * Test whether the received PHY event has to be ignored or not.
7158 * True if the event has to be ignored.
7160 bool sata_lpm_ignore_phy_events(struct ata_link *link)
7162 unsigned long lpm_timeout = link->last_lpm_change +
7163 msecs_to_jiffies(ATA_TMOUT_SPURIOUS_PHY);
7165 /* if LPM is enabled, PHYRDY doesn't mean anything */
7166 if (link->lpm_policy > ATA_LPM_MAX_POWER)
7169 /* ignore the first PHY event after the LPM policy changed
7170 * as it is might be spurious
7172 if ((link->flags & ATA_LFLAG_CHANGED) &&
7173 time_before(jiffies, lpm_timeout))
7178 EXPORT_SYMBOL_GPL(sata_lpm_ignore_phy_events);
7183 static unsigned int ata_dummy_qc_issue(struct ata_queued_cmd *qc)
7185 return AC_ERR_SYSTEM;
7188 static void ata_dummy_error_handler(struct ata_port *ap)
7193 struct ata_port_operations ata_dummy_port_ops = {
7194 .qc_prep = ata_noop_qc_prep,
7195 .qc_issue = ata_dummy_qc_issue,
7196 .error_handler = ata_dummy_error_handler,
7197 .sched_eh = ata_std_sched_eh,
7198 .end_eh = ata_std_end_eh,
7201 const struct ata_port_info ata_dummy_port_info = {
7202 .port_ops = &ata_dummy_port_ops,
7206 * Utility print functions
7208 void ata_port_printk(const struct ata_port *ap, const char *level,
7209 const char *fmt, ...)
7211 struct va_format vaf;
7214 va_start(args, fmt);
7219 printk("%sata%u: %pV", level, ap->print_id, &vaf);
7223 EXPORT_SYMBOL(ata_port_printk);
7225 void ata_link_printk(const struct ata_link *link, const char *level,
7226 const char *fmt, ...)
7228 struct va_format vaf;
7231 va_start(args, fmt);
7236 if (sata_pmp_attached(link->ap) || link->ap->slave_link)
7237 printk("%sata%u.%02u: %pV",
7238 level, link->ap->print_id, link->pmp, &vaf);
7240 printk("%sata%u: %pV",
7241 level, link->ap->print_id, &vaf);
7245 EXPORT_SYMBOL(ata_link_printk);
7247 void ata_dev_printk(const struct ata_device *dev, const char *level,
7248 const char *fmt, ...)
7250 struct va_format vaf;
7253 va_start(args, fmt);
7258 printk("%sata%u.%02u: %pV",
7259 level, dev->link->ap->print_id, dev->link->pmp + dev->devno,
7264 EXPORT_SYMBOL(ata_dev_printk);
7266 void ata_print_version(const struct device *dev, const char *version)
7268 dev_printk(KERN_DEBUG, dev, "version %s\n", version);
7270 EXPORT_SYMBOL(ata_print_version);
7273 * libata is essentially a library of internal helper functions for
7274 * low-level ATA host controller drivers. As such, the API/ABI is
7275 * likely to change as new drivers are added and updated.
7276 * Do not depend on ABI/API stability.
7278 EXPORT_SYMBOL_GPL(sata_deb_timing_normal);
7279 EXPORT_SYMBOL_GPL(sata_deb_timing_hotplug);
7280 EXPORT_SYMBOL_GPL(sata_deb_timing_long);
7281 EXPORT_SYMBOL_GPL(ata_base_port_ops);
7282 EXPORT_SYMBOL_GPL(sata_port_ops);
7283 EXPORT_SYMBOL_GPL(ata_dummy_port_ops);
7284 EXPORT_SYMBOL_GPL(ata_dummy_port_info);
7285 EXPORT_SYMBOL_GPL(ata_link_next);
7286 EXPORT_SYMBOL_GPL(ata_dev_next);
7287 EXPORT_SYMBOL_GPL(ata_std_bios_param);
7288 EXPORT_SYMBOL_GPL(ata_scsi_unlock_native_capacity);
7289 EXPORT_SYMBOL_GPL(ata_host_init);
7290 EXPORT_SYMBOL_GPL(ata_host_alloc);
7291 EXPORT_SYMBOL_GPL(ata_host_alloc_pinfo);
7292 EXPORT_SYMBOL_GPL(ata_slave_link_init);
7293 EXPORT_SYMBOL_GPL(ata_host_start);
7294 EXPORT_SYMBOL_GPL(ata_host_register);
7295 EXPORT_SYMBOL_GPL(ata_host_activate);
7296 EXPORT_SYMBOL_GPL(ata_host_detach);
7297 EXPORT_SYMBOL_GPL(ata_sg_init);
7298 EXPORT_SYMBOL_GPL(ata_qc_complete);
7299 EXPORT_SYMBOL_GPL(ata_qc_complete_multiple);
7300 EXPORT_SYMBOL_GPL(atapi_cmd_type);
7301 EXPORT_SYMBOL_GPL(ata_tf_to_fis);
7302 EXPORT_SYMBOL_GPL(ata_tf_from_fis);
7303 EXPORT_SYMBOL_GPL(ata_pack_xfermask);
7304 EXPORT_SYMBOL_GPL(ata_unpack_xfermask);
7305 EXPORT_SYMBOL_GPL(ata_xfer_mask2mode);
7306 EXPORT_SYMBOL_GPL(ata_xfer_mode2mask);
7307 EXPORT_SYMBOL_GPL(ata_xfer_mode2shift);
7308 EXPORT_SYMBOL_GPL(ata_mode_string);
7309 EXPORT_SYMBOL_GPL(ata_id_xfermask);
7310 EXPORT_SYMBOL_GPL(ata_do_set_mode);
7311 EXPORT_SYMBOL_GPL(ata_std_qc_defer);
7312 EXPORT_SYMBOL_GPL(ata_noop_qc_prep);
7313 EXPORT_SYMBOL_GPL(ata_dev_disable);
7314 EXPORT_SYMBOL_GPL(sata_set_spd);
7315 EXPORT_SYMBOL_GPL(ata_wait_after_reset);
7316 EXPORT_SYMBOL_GPL(sata_link_debounce);
7317 EXPORT_SYMBOL_GPL(sata_link_resume);
7318 EXPORT_SYMBOL_GPL(sata_link_scr_lpm);
7319 EXPORT_SYMBOL_GPL(ata_std_prereset);
7320 EXPORT_SYMBOL_GPL(sata_link_hardreset);
7321 EXPORT_SYMBOL_GPL(sata_std_hardreset);
7322 EXPORT_SYMBOL_GPL(ata_std_postreset);
7323 EXPORT_SYMBOL_GPL(ata_dev_classify);
7324 EXPORT_SYMBOL_GPL(ata_dev_pair);
7325 EXPORT_SYMBOL_GPL(ata_ratelimit);
7326 EXPORT_SYMBOL_GPL(ata_msleep);
7327 EXPORT_SYMBOL_GPL(ata_wait_register);
7328 EXPORT_SYMBOL_GPL(ata_scsi_queuecmd);
7329 EXPORT_SYMBOL_GPL(ata_scsi_slave_config);
7330 EXPORT_SYMBOL_GPL(ata_scsi_slave_destroy);
7331 EXPORT_SYMBOL_GPL(ata_scsi_change_queue_depth);
7332 EXPORT_SYMBOL_GPL(__ata_change_queue_depth);
7333 EXPORT_SYMBOL_GPL(sata_scr_valid);
7334 EXPORT_SYMBOL_GPL(sata_scr_read);
7335 EXPORT_SYMBOL_GPL(sata_scr_write);
7336 EXPORT_SYMBOL_GPL(sata_scr_write_flush);
7337 EXPORT_SYMBOL_GPL(ata_link_online);
7338 EXPORT_SYMBOL_GPL(ata_link_offline);
7340 EXPORT_SYMBOL_GPL(ata_host_suspend);
7341 EXPORT_SYMBOL_GPL(ata_host_resume);
7342 #endif /* CONFIG_PM */
7343 EXPORT_SYMBOL_GPL(ata_id_string);
7344 EXPORT_SYMBOL_GPL(ata_id_c_string);
7345 EXPORT_SYMBOL_GPL(ata_do_dev_read_id);
7346 EXPORT_SYMBOL_GPL(ata_scsi_simulate);
7348 EXPORT_SYMBOL_GPL(ata_pio_need_iordy);
7349 EXPORT_SYMBOL_GPL(ata_timing_find_mode);
7350 EXPORT_SYMBOL_GPL(ata_timing_compute);
7351 EXPORT_SYMBOL_GPL(ata_timing_merge);
7352 EXPORT_SYMBOL_GPL(ata_timing_cycle2mode);
7355 EXPORT_SYMBOL_GPL(pci_test_config_bits);
7356 EXPORT_SYMBOL_GPL(ata_pci_remove_one);
7358 EXPORT_SYMBOL_GPL(ata_pci_device_do_suspend);
7359 EXPORT_SYMBOL_GPL(ata_pci_device_do_resume);
7360 EXPORT_SYMBOL_GPL(ata_pci_device_suspend);
7361 EXPORT_SYMBOL_GPL(ata_pci_device_resume);
7362 #endif /* CONFIG_PM */
7363 #endif /* CONFIG_PCI */
7365 EXPORT_SYMBOL_GPL(ata_platform_remove_one);
7367 EXPORT_SYMBOL_GPL(__ata_ehi_push_desc);
7368 EXPORT_SYMBOL_GPL(ata_ehi_push_desc);
7369 EXPORT_SYMBOL_GPL(ata_ehi_clear_desc);
7370 EXPORT_SYMBOL_GPL(ata_port_desc);
7372 EXPORT_SYMBOL_GPL(ata_port_pbar_desc);
7373 #endif /* CONFIG_PCI */
7374 EXPORT_SYMBOL_GPL(ata_port_schedule_eh);
7375 EXPORT_SYMBOL_GPL(ata_link_abort);
7376 EXPORT_SYMBOL_GPL(ata_port_abort);
7377 EXPORT_SYMBOL_GPL(ata_port_freeze);
7378 EXPORT_SYMBOL_GPL(sata_async_notification);
7379 EXPORT_SYMBOL_GPL(ata_eh_freeze_port);
7380 EXPORT_SYMBOL_GPL(ata_eh_thaw_port);
7381 EXPORT_SYMBOL_GPL(ata_eh_qc_complete);
7382 EXPORT_SYMBOL_GPL(ata_eh_qc_retry);
7383 EXPORT_SYMBOL_GPL(ata_eh_analyze_ncq_error);
7384 EXPORT_SYMBOL_GPL(ata_do_eh);
7385 EXPORT_SYMBOL_GPL(ata_std_error_handler);
7387 EXPORT_SYMBOL_GPL(ata_cable_40wire);
7388 EXPORT_SYMBOL_GPL(ata_cable_80wire);
7389 EXPORT_SYMBOL_GPL(ata_cable_unknown);
7390 EXPORT_SYMBOL_GPL(ata_cable_ignore);
7391 EXPORT_SYMBOL_GPL(ata_cable_sata);