2 * libata-core.c - helper library for ATA
4 * Maintained by: Jeff Garzik <jgarzik@pobox.com>
5 * Please ALWAYS copy linux-ide@vger.kernel.org
8 * Copyright 2003-2004 Red Hat, Inc. All rights reserved.
9 * Copyright 2003-2004 Jeff Garzik
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2, or (at your option)
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; see the file COPYING. If not, write to
24 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
27 * libata documentation is available via 'make {ps|pdf}docs',
28 * as Documentation/DocBook/libata.*
30 * Hardware documentation available from http://www.t13.org/ and
31 * http://www.sata-io.org/
33 * Standards documents from:
34 * http://www.t13.org (ATA standards, PCI DMA IDE spec)
35 * http://www.t10.org (SCSI MMC - for ATAPI MMC)
36 * http://www.sata-io.org (SATA)
37 * http://www.compactflash.org (CF)
38 * http://www.qic.org (QIC157 - Tape and DSC)
39 * http://www.ce-ata.org (CE-ATA: not supported)
43 #include <linux/kernel.h>
44 #include <linux/module.h>
45 #include <linux/pci.h>
46 #include <linux/init.h>
47 #include <linux/list.h>
49 #include <linux/spinlock.h>
50 #include <linux/blkdev.h>
51 #include <linux/delay.h>
52 #include <linux/timer.h>
53 #include <linux/interrupt.h>
54 #include <linux/completion.h>
55 #include <linux/suspend.h>
56 #include <linux/workqueue.h>
57 #include <linux/scatterlist.h>
59 #include <linux/async.h>
60 #include <linux/log2.h>
61 #include <linux/slab.h>
62 #include <scsi/scsi.h>
63 #include <scsi/scsi_cmnd.h>
64 #include <scsi/scsi_host.h>
65 #include <linux/libata.h>
66 #include <asm/byteorder.h>
67 #include <linux/cdrom.h>
68 #include <linux/ratelimit.h>
69 #include <linux/pm_runtime.h>
70 #include <linux/platform_device.h>
73 #include "libata-transport.h"
75 /* debounce timing parameters in msecs { interval, duration, timeout } */
76 const unsigned long sata_deb_timing_normal[] = { 5, 100, 2000 };
77 const unsigned long sata_deb_timing_hotplug[] = { 25, 500, 2000 };
78 const unsigned long sata_deb_timing_long[] = { 100, 2000, 5000 };
80 const struct ata_port_operations ata_base_port_ops = {
81 .prereset = ata_std_prereset,
82 .postreset = ata_std_postreset,
83 .error_handler = ata_std_error_handler,
84 .sched_eh = ata_std_sched_eh,
85 .end_eh = ata_std_end_eh,
88 const struct ata_port_operations sata_port_ops = {
89 .inherits = &ata_base_port_ops,
91 .qc_defer = ata_std_qc_defer,
92 .hardreset = sata_std_hardreset,
95 static unsigned int ata_dev_init_params(struct ata_device *dev,
96 u16 heads, u16 sectors);
97 static unsigned int ata_dev_set_xfermode(struct ata_device *dev);
98 static void ata_dev_xfermask(struct ata_device *dev);
99 static unsigned long ata_dev_blacklisted(const struct ata_device *dev);
101 atomic_t ata_print_id = ATOMIC_INIT(0);
103 struct ata_force_param {
107 unsigned long xfer_mask;
108 unsigned int horkage_on;
109 unsigned int horkage_off;
113 struct ata_force_ent {
116 struct ata_force_param param;
119 static struct ata_force_ent *ata_force_tbl;
120 static int ata_force_tbl_size;
122 static char ata_force_param_buf[PAGE_SIZE] __initdata;
123 /* param_buf is thrown away after initialization, disallow read */
124 module_param_string(force, ata_force_param_buf, sizeof(ata_force_param_buf), 0);
125 MODULE_PARM_DESC(force, "Force ATA configurations including cable type, link speed and transfer mode (see Documentation/kernel-parameters.txt for details)");
127 static int atapi_enabled = 1;
128 module_param(atapi_enabled, int, 0444);
129 MODULE_PARM_DESC(atapi_enabled, "Enable discovery of ATAPI devices (0=off, 1=on [default])");
131 static int atapi_dmadir = 0;
132 module_param(atapi_dmadir, int, 0444);
133 MODULE_PARM_DESC(atapi_dmadir, "Enable ATAPI DMADIR bridge support (0=off [default], 1=on)");
135 int atapi_passthru16 = 1;
136 module_param(atapi_passthru16, int, 0444);
137 MODULE_PARM_DESC(atapi_passthru16, "Enable ATA_16 passthru for ATAPI devices (0=off, 1=on [default])");
140 module_param_named(fua, libata_fua, int, 0444);
141 MODULE_PARM_DESC(fua, "FUA support (0=off [default], 1=on)");
143 static int ata_ignore_hpa;
144 module_param_named(ignore_hpa, ata_ignore_hpa, int, 0644);
145 MODULE_PARM_DESC(ignore_hpa, "Ignore HPA limit (0=keep BIOS limits, 1=ignore limits, using full disk)");
147 static int libata_dma_mask = ATA_DMA_MASK_ATA|ATA_DMA_MASK_ATAPI|ATA_DMA_MASK_CFA;
148 module_param_named(dma, libata_dma_mask, int, 0444);
149 MODULE_PARM_DESC(dma, "DMA enable/disable (0x1==ATA, 0x2==ATAPI, 0x4==CF)");
151 static int ata_probe_timeout;
152 module_param(ata_probe_timeout, int, 0444);
153 MODULE_PARM_DESC(ata_probe_timeout, "Set ATA probing timeout (seconds)");
155 int libata_noacpi = 0;
156 module_param_named(noacpi, libata_noacpi, int, 0444);
157 MODULE_PARM_DESC(noacpi, "Disable the use of ACPI in probe/suspend/resume (0=off [default], 1=on)");
159 int libata_allow_tpm = 0;
160 module_param_named(allow_tpm, libata_allow_tpm, int, 0444);
161 MODULE_PARM_DESC(allow_tpm, "Permit the use of TPM commands (0=off [default], 1=on)");
164 module_param(atapi_an, int, 0444);
165 MODULE_PARM_DESC(atapi_an, "Enable ATAPI AN media presence notification (0=0ff [default], 1=on)");
167 MODULE_AUTHOR("Jeff Garzik");
168 MODULE_DESCRIPTION("Library module for ATA devices");
169 MODULE_LICENSE("GPL");
170 MODULE_VERSION(DRV_VERSION);
173 static bool ata_sstatus_online(u32 sstatus)
175 return (sstatus & 0xf) == 0x3;
179 * ata_link_next - link iteration helper
180 * @link: the previous link, NULL to start
181 * @ap: ATA port containing links to iterate
182 * @mode: iteration mode, one of ATA_LITER_*
185 * Host lock or EH context.
188 * Pointer to the next link.
190 struct ata_link *ata_link_next(struct ata_link *link, struct ata_port *ap,
191 enum ata_link_iter_mode mode)
193 BUG_ON(mode != ATA_LITER_EDGE &&
194 mode != ATA_LITER_PMP_FIRST && mode != ATA_LITER_HOST_FIRST);
196 /* NULL link indicates start of iteration */
200 case ATA_LITER_PMP_FIRST:
201 if (sata_pmp_attached(ap))
204 case ATA_LITER_HOST_FIRST:
208 /* we just iterated over the host link, what's next? */
209 if (link == &ap->link)
211 case ATA_LITER_HOST_FIRST:
212 if (sata_pmp_attached(ap))
215 case ATA_LITER_PMP_FIRST:
216 if (unlikely(ap->slave_link))
217 return ap->slave_link;
223 /* slave_link excludes PMP */
224 if (unlikely(link == ap->slave_link))
227 /* we were over a PMP link */
228 if (++link < ap->pmp_link + ap->nr_pmp_links)
231 if (mode == ATA_LITER_PMP_FIRST)
238 * ata_dev_next - device iteration helper
239 * @dev: the previous device, NULL to start
240 * @link: ATA link containing devices to iterate
241 * @mode: iteration mode, one of ATA_DITER_*
244 * Host lock or EH context.
247 * Pointer to the next device.
249 struct ata_device *ata_dev_next(struct ata_device *dev, struct ata_link *link,
250 enum ata_dev_iter_mode mode)
252 BUG_ON(mode != ATA_DITER_ENABLED && mode != ATA_DITER_ENABLED_REVERSE &&
253 mode != ATA_DITER_ALL && mode != ATA_DITER_ALL_REVERSE);
255 /* NULL dev indicates start of iteration */
258 case ATA_DITER_ENABLED:
262 case ATA_DITER_ENABLED_REVERSE:
263 case ATA_DITER_ALL_REVERSE:
264 dev = link->device + ata_link_max_devices(link) - 1;
269 /* move to the next one */
271 case ATA_DITER_ENABLED:
273 if (++dev < link->device + ata_link_max_devices(link))
276 case ATA_DITER_ENABLED_REVERSE:
277 case ATA_DITER_ALL_REVERSE:
278 if (--dev >= link->device)
284 if ((mode == ATA_DITER_ENABLED || mode == ATA_DITER_ENABLED_REVERSE) &&
285 !ata_dev_enabled(dev))
291 * ata_dev_phys_link - find physical link for a device
292 * @dev: ATA device to look up physical link for
294 * Look up physical link which @dev is attached to. Note that
295 * this is different from @dev->link only when @dev is on slave
296 * link. For all other cases, it's the same as @dev->link.
302 * Pointer to the found physical link.
304 struct ata_link *ata_dev_phys_link(struct ata_device *dev)
306 struct ata_port *ap = dev->link->ap;
312 return ap->slave_link;
316 * ata_force_cbl - force cable type according to libata.force
317 * @ap: ATA port of interest
319 * Force cable type according to libata.force and whine about it.
320 * The last entry which has matching port number is used, so it
321 * can be specified as part of device force parameters. For
322 * example, both "a:40c,1.00:udma4" and "1.00:40c,udma4" have the
328 void ata_force_cbl(struct ata_port *ap)
332 for (i = ata_force_tbl_size - 1; i >= 0; i--) {
333 const struct ata_force_ent *fe = &ata_force_tbl[i];
335 if (fe->port != -1 && fe->port != ap->print_id)
338 if (fe->param.cbl == ATA_CBL_NONE)
341 ap->cbl = fe->param.cbl;
342 ata_port_notice(ap, "FORCE: cable set to %s\n", fe->param.name);
348 * ata_force_link_limits - force link limits according to libata.force
349 * @link: ATA link of interest
351 * Force link flags and SATA spd limit according to libata.force
352 * and whine about it. When only the port part is specified
353 * (e.g. 1:), the limit applies to all links connected to both
354 * the host link and all fan-out ports connected via PMP. If the
355 * device part is specified as 0 (e.g. 1.00:), it specifies the
356 * first fan-out link not the host link. Device number 15 always
357 * points to the host link whether PMP is attached or not. If the
358 * controller has slave link, device number 16 points to it.
363 static void ata_force_link_limits(struct ata_link *link)
365 bool did_spd = false;
366 int linkno = link->pmp;
369 if (ata_is_host_link(link))
372 for (i = ata_force_tbl_size - 1; i >= 0; i--) {
373 const struct ata_force_ent *fe = &ata_force_tbl[i];
375 if (fe->port != -1 && fe->port != link->ap->print_id)
378 if (fe->device != -1 && fe->device != linkno)
381 /* only honor the first spd limit */
382 if (!did_spd && fe->param.spd_limit) {
383 link->hw_sata_spd_limit = (1 << fe->param.spd_limit) - 1;
384 ata_link_notice(link, "FORCE: PHY spd limit set to %s\n",
389 /* let lflags stack */
390 if (fe->param.lflags) {
391 link->flags |= fe->param.lflags;
392 ata_link_notice(link,
393 "FORCE: link flag 0x%x forced -> 0x%x\n",
394 fe->param.lflags, link->flags);
400 * ata_force_xfermask - force xfermask according to libata.force
401 * @dev: ATA device of interest
403 * Force xfer_mask according to libata.force and whine about it.
404 * For consistency with link selection, device number 15 selects
405 * the first device connected to the host link.
410 static void ata_force_xfermask(struct ata_device *dev)
412 int devno = dev->link->pmp + dev->devno;
413 int alt_devno = devno;
416 /* allow n.15/16 for devices attached to host port */
417 if (ata_is_host_link(dev->link))
420 for (i = ata_force_tbl_size - 1; i >= 0; i--) {
421 const struct ata_force_ent *fe = &ata_force_tbl[i];
422 unsigned long pio_mask, mwdma_mask, udma_mask;
424 if (fe->port != -1 && fe->port != dev->link->ap->print_id)
427 if (fe->device != -1 && fe->device != devno &&
428 fe->device != alt_devno)
431 if (!fe->param.xfer_mask)
434 ata_unpack_xfermask(fe->param.xfer_mask,
435 &pio_mask, &mwdma_mask, &udma_mask);
437 dev->udma_mask = udma_mask;
438 else if (mwdma_mask) {
440 dev->mwdma_mask = mwdma_mask;
444 dev->pio_mask = pio_mask;
447 ata_dev_notice(dev, "FORCE: xfer_mask set to %s\n",
454 * ata_force_horkage - force horkage according to libata.force
455 * @dev: ATA device of interest
457 * Force horkage according to libata.force and whine about it.
458 * For consistency with link selection, device number 15 selects
459 * the first device connected to the host link.
464 static void ata_force_horkage(struct ata_device *dev)
466 int devno = dev->link->pmp + dev->devno;
467 int alt_devno = devno;
470 /* allow n.15/16 for devices attached to host port */
471 if (ata_is_host_link(dev->link))
474 for (i = 0; i < ata_force_tbl_size; i++) {
475 const struct ata_force_ent *fe = &ata_force_tbl[i];
477 if (fe->port != -1 && fe->port != dev->link->ap->print_id)
480 if (fe->device != -1 && fe->device != devno &&
481 fe->device != alt_devno)
484 if (!(~dev->horkage & fe->param.horkage_on) &&
485 !(dev->horkage & fe->param.horkage_off))
488 dev->horkage |= fe->param.horkage_on;
489 dev->horkage &= ~fe->param.horkage_off;
491 ata_dev_notice(dev, "FORCE: horkage modified (%s)\n",
497 * atapi_cmd_type - Determine ATAPI command type from SCSI opcode
498 * @opcode: SCSI opcode
500 * Determine ATAPI command type from @opcode.
506 * ATAPI_{READ|WRITE|READ_CD|PASS_THRU|MISC}
508 int atapi_cmd_type(u8 opcode)
517 case GPCMD_WRITE_AND_VERIFY_10:
521 case GPCMD_READ_CD_MSF:
522 return ATAPI_READ_CD;
526 if (atapi_passthru16)
527 return ATAPI_PASS_THRU;
535 * ata_tf_to_fis - Convert ATA taskfile to SATA FIS structure
536 * @tf: Taskfile to convert
537 * @pmp: Port multiplier port
538 * @is_cmd: This FIS is for command
539 * @fis: Buffer into which data will output
541 * Converts a standard ATA taskfile to a Serial ATA
542 * FIS structure (Register - Host to Device).
545 * Inherited from caller.
547 void ata_tf_to_fis(const struct ata_taskfile *tf, u8 pmp, int is_cmd, u8 *fis)
549 fis[0] = 0x27; /* Register - Host to Device FIS */
550 fis[1] = pmp & 0xf; /* Port multiplier number*/
552 fis[1] |= (1 << 7); /* bit 7 indicates Command FIS */
554 fis[2] = tf->command;
555 fis[3] = tf->feature;
562 fis[8] = tf->hob_lbal;
563 fis[9] = tf->hob_lbam;
564 fis[10] = tf->hob_lbah;
565 fis[11] = tf->hob_feature;
568 fis[13] = tf->hob_nsect;
579 * ata_tf_from_fis - Convert SATA FIS to ATA taskfile
580 * @fis: Buffer from which data will be input
581 * @tf: Taskfile to output
583 * Converts a serial ATA FIS structure to a standard ATA taskfile.
586 * Inherited from caller.
589 void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf)
591 tf->command = fis[2]; /* status */
592 tf->feature = fis[3]; /* error */
599 tf->hob_lbal = fis[8];
600 tf->hob_lbam = fis[9];
601 tf->hob_lbah = fis[10];
604 tf->hob_nsect = fis[13];
607 static const u8 ata_rw_cmds[] = {
611 ATA_CMD_READ_MULTI_EXT,
612 ATA_CMD_WRITE_MULTI_EXT,
616 ATA_CMD_WRITE_MULTI_FUA_EXT,
620 ATA_CMD_PIO_READ_EXT,
621 ATA_CMD_PIO_WRITE_EXT,
634 ATA_CMD_WRITE_FUA_EXT
638 * ata_rwcmd_protocol - set taskfile r/w commands and protocol
639 * @tf: command to examine and configure
640 * @dev: device tf belongs to
642 * Examine the device configuration and tf->flags to calculate
643 * the proper read/write commands and protocol to use.
648 static int ata_rwcmd_protocol(struct ata_taskfile *tf, struct ata_device *dev)
652 int index, fua, lba48, write;
654 fua = (tf->flags & ATA_TFLAG_FUA) ? 4 : 0;
655 lba48 = (tf->flags & ATA_TFLAG_LBA48) ? 2 : 0;
656 write = (tf->flags & ATA_TFLAG_WRITE) ? 1 : 0;
658 if (dev->flags & ATA_DFLAG_PIO) {
659 tf->protocol = ATA_PROT_PIO;
660 index = dev->multi_count ? 0 : 8;
661 } else if (lba48 && (dev->link->ap->flags & ATA_FLAG_PIO_LBA48)) {
662 /* Unable to use DMA due to host limitation */
663 tf->protocol = ATA_PROT_PIO;
664 index = dev->multi_count ? 0 : 8;
666 tf->protocol = ATA_PROT_DMA;
670 cmd = ata_rw_cmds[index + fua + lba48 + write];
679 * ata_tf_read_block - Read block address from ATA taskfile
680 * @tf: ATA taskfile of interest
681 * @dev: ATA device @tf belongs to
686 * Read block address from @tf. This function can handle all
687 * three address formats - LBA, LBA48 and CHS. tf->protocol and
688 * flags select the address format to use.
691 * Block address read from @tf.
693 u64 ata_tf_read_block(struct ata_taskfile *tf, struct ata_device *dev)
697 if (tf->flags & ATA_TFLAG_LBA) {
698 if (tf->flags & ATA_TFLAG_LBA48) {
699 block |= (u64)tf->hob_lbah << 40;
700 block |= (u64)tf->hob_lbam << 32;
701 block |= (u64)tf->hob_lbal << 24;
703 block |= (tf->device & 0xf) << 24;
705 block |= tf->lbah << 16;
706 block |= tf->lbam << 8;
711 cyl = tf->lbam | (tf->lbah << 8);
712 head = tf->device & 0xf;
717 "device reported invalid CHS sector 0\n");
718 sect = 1; /* oh well */
721 block = (cyl * dev->heads + head) * dev->sectors + sect - 1;
728 * ata_build_rw_tf - Build ATA taskfile for given read/write request
729 * @tf: Target ATA taskfile
730 * @dev: ATA device @tf belongs to
731 * @block: Block address
732 * @n_block: Number of blocks
733 * @tf_flags: RW/FUA etc...
739 * Build ATA taskfile @tf for read/write request described by
740 * @block, @n_block, @tf_flags and @tag on @dev.
744 * 0 on success, -ERANGE if the request is too large for @dev,
745 * -EINVAL if the request is invalid.
747 int ata_build_rw_tf(struct ata_taskfile *tf, struct ata_device *dev,
748 u64 block, u32 n_block, unsigned int tf_flags,
751 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
752 tf->flags |= tf_flags;
754 if (ata_ncq_enabled(dev) && likely(tag != ATA_TAG_INTERNAL)) {
756 if (!lba_48_ok(block, n_block))
759 tf->protocol = ATA_PROT_NCQ;
760 tf->flags |= ATA_TFLAG_LBA | ATA_TFLAG_LBA48;
762 if (tf->flags & ATA_TFLAG_WRITE)
763 tf->command = ATA_CMD_FPDMA_WRITE;
765 tf->command = ATA_CMD_FPDMA_READ;
767 tf->nsect = tag << 3;
768 tf->hob_feature = (n_block >> 8) & 0xff;
769 tf->feature = n_block & 0xff;
771 tf->hob_lbah = (block >> 40) & 0xff;
772 tf->hob_lbam = (block >> 32) & 0xff;
773 tf->hob_lbal = (block >> 24) & 0xff;
774 tf->lbah = (block >> 16) & 0xff;
775 tf->lbam = (block >> 8) & 0xff;
776 tf->lbal = block & 0xff;
778 tf->device = ATA_LBA;
779 if (tf->flags & ATA_TFLAG_FUA)
780 tf->device |= 1 << 7;
781 } else if (dev->flags & ATA_DFLAG_LBA) {
782 tf->flags |= ATA_TFLAG_LBA;
784 if (lba_28_ok(block, n_block)) {
786 tf->device |= (block >> 24) & 0xf;
787 } else if (lba_48_ok(block, n_block)) {
788 if (!(dev->flags & ATA_DFLAG_LBA48))
792 tf->flags |= ATA_TFLAG_LBA48;
794 tf->hob_nsect = (n_block >> 8) & 0xff;
796 tf->hob_lbah = (block >> 40) & 0xff;
797 tf->hob_lbam = (block >> 32) & 0xff;
798 tf->hob_lbal = (block >> 24) & 0xff;
800 /* request too large even for LBA48 */
803 if (unlikely(ata_rwcmd_protocol(tf, dev) < 0))
806 tf->nsect = n_block & 0xff;
808 tf->lbah = (block >> 16) & 0xff;
809 tf->lbam = (block >> 8) & 0xff;
810 tf->lbal = block & 0xff;
812 tf->device |= ATA_LBA;
815 u32 sect, head, cyl, track;
817 /* The request -may- be too large for CHS addressing. */
818 if (!lba_28_ok(block, n_block))
821 if (unlikely(ata_rwcmd_protocol(tf, dev) < 0))
824 /* Convert LBA to CHS */
825 track = (u32)block / dev->sectors;
826 cyl = track / dev->heads;
827 head = track % dev->heads;
828 sect = (u32)block % dev->sectors + 1;
830 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
831 (u32)block, track, cyl, head, sect);
833 /* Check whether the converted CHS can fit.
837 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
840 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
851 * ata_pack_xfermask - Pack pio, mwdma and udma masks into xfer_mask
852 * @pio_mask: pio_mask
853 * @mwdma_mask: mwdma_mask
854 * @udma_mask: udma_mask
856 * Pack @pio_mask, @mwdma_mask and @udma_mask into a single
857 * unsigned int xfer_mask.
865 unsigned long ata_pack_xfermask(unsigned long pio_mask,
866 unsigned long mwdma_mask,
867 unsigned long udma_mask)
869 return ((pio_mask << ATA_SHIFT_PIO) & ATA_MASK_PIO) |
870 ((mwdma_mask << ATA_SHIFT_MWDMA) & ATA_MASK_MWDMA) |
871 ((udma_mask << ATA_SHIFT_UDMA) & ATA_MASK_UDMA);
875 * ata_unpack_xfermask - Unpack xfer_mask into pio, mwdma and udma masks
876 * @xfer_mask: xfer_mask to unpack
877 * @pio_mask: resulting pio_mask
878 * @mwdma_mask: resulting mwdma_mask
879 * @udma_mask: resulting udma_mask
881 * Unpack @xfer_mask into @pio_mask, @mwdma_mask and @udma_mask.
882 * Any NULL distination masks will be ignored.
884 void ata_unpack_xfermask(unsigned long xfer_mask, unsigned long *pio_mask,
885 unsigned long *mwdma_mask, unsigned long *udma_mask)
888 *pio_mask = (xfer_mask & ATA_MASK_PIO) >> ATA_SHIFT_PIO;
890 *mwdma_mask = (xfer_mask & ATA_MASK_MWDMA) >> ATA_SHIFT_MWDMA;
892 *udma_mask = (xfer_mask & ATA_MASK_UDMA) >> ATA_SHIFT_UDMA;
895 static const struct ata_xfer_ent {
899 { ATA_SHIFT_PIO, ATA_NR_PIO_MODES, XFER_PIO_0 },
900 { ATA_SHIFT_MWDMA, ATA_NR_MWDMA_MODES, XFER_MW_DMA_0 },
901 { ATA_SHIFT_UDMA, ATA_NR_UDMA_MODES, XFER_UDMA_0 },
906 * ata_xfer_mask2mode - Find matching XFER_* for the given xfer_mask
907 * @xfer_mask: xfer_mask of interest
909 * Return matching XFER_* value for @xfer_mask. Only the highest
910 * bit of @xfer_mask is considered.
916 * Matching XFER_* value, 0xff if no match found.
918 u8 ata_xfer_mask2mode(unsigned long xfer_mask)
920 int highbit = fls(xfer_mask) - 1;
921 const struct ata_xfer_ent *ent;
923 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
924 if (highbit >= ent->shift && highbit < ent->shift + ent->bits)
925 return ent->base + highbit - ent->shift;
930 * ata_xfer_mode2mask - Find matching xfer_mask for XFER_*
931 * @xfer_mode: XFER_* of interest
933 * Return matching xfer_mask for @xfer_mode.
939 * Matching xfer_mask, 0 if no match found.
941 unsigned long ata_xfer_mode2mask(u8 xfer_mode)
943 const struct ata_xfer_ent *ent;
945 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
946 if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits)
947 return ((2 << (ent->shift + xfer_mode - ent->base)) - 1)
948 & ~((1 << ent->shift) - 1);
953 * ata_xfer_mode2shift - Find matching xfer_shift for XFER_*
954 * @xfer_mode: XFER_* of interest
956 * Return matching xfer_shift for @xfer_mode.
962 * Matching xfer_shift, -1 if no match found.
964 int ata_xfer_mode2shift(unsigned long xfer_mode)
966 const struct ata_xfer_ent *ent;
968 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
969 if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits)
975 * ata_mode_string - convert xfer_mask to string
976 * @xfer_mask: mask of bits supported; only highest bit counts.
978 * Determine string which represents the highest speed
979 * (highest bit in @modemask).
985 * Constant C string representing highest speed listed in
986 * @mode_mask, or the constant C string "<n/a>".
988 const char *ata_mode_string(unsigned long xfer_mask)
990 static const char * const xfer_mode_str[] = {
1014 highbit = fls(xfer_mask) - 1;
1015 if (highbit >= 0 && highbit < ARRAY_SIZE(xfer_mode_str))
1016 return xfer_mode_str[highbit];
1020 const char *sata_spd_string(unsigned int spd)
1022 static const char * const spd_str[] = {
1028 if (spd == 0 || (spd - 1) >= ARRAY_SIZE(spd_str))
1030 return spd_str[spd - 1];
1034 * ata_dev_classify - determine device type based on ATA-spec signature
1035 * @tf: ATA taskfile register set for device to be identified
1037 * Determine from taskfile register contents whether a device is
1038 * ATA or ATAPI, as per "Signature and persistence" section
1039 * of ATA/PI spec (volume 1, sect 5.14).
1045 * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, %ATA_DEV_PMP or
1046 * %ATA_DEV_UNKNOWN the event of failure.
1048 unsigned int ata_dev_classify(const struct ata_taskfile *tf)
1050 /* Apple's open source Darwin code hints that some devices only
1051 * put a proper signature into the LBA mid/high registers,
1052 * So, we only check those. It's sufficient for uniqueness.
1054 * ATA/ATAPI-7 (d1532v1r1: Feb. 19, 2003) specified separate
1055 * signatures for ATA and ATAPI devices attached on SerialATA,
1056 * 0x3c/0xc3 and 0x69/0x96 respectively. However, SerialATA
1057 * spec has never mentioned about using different signatures
1058 * for ATA/ATAPI devices. Then, Serial ATA II: Port
1059 * Multiplier specification began to use 0x69/0x96 to identify
1060 * port multpliers and 0x3c/0xc3 to identify SEMB device.
1061 * ATA/ATAPI-7 dropped descriptions about 0x3c/0xc3 and
1062 * 0x69/0x96 shortly and described them as reserved for
1065 * We follow the current spec and consider that 0x69/0x96
1066 * identifies a port multiplier and 0x3c/0xc3 a SEMB device.
1067 * Unfortunately, WDC WD1600JS-62MHB5 (a hard drive) reports
1068 * SEMB signature. This is worked around in
1069 * ata_dev_read_id().
1071 if ((tf->lbam == 0) && (tf->lbah == 0)) {
1072 DPRINTK("found ATA device by sig\n");
1076 if ((tf->lbam == 0x14) && (tf->lbah == 0xeb)) {
1077 DPRINTK("found ATAPI device by sig\n");
1078 return ATA_DEV_ATAPI;
1081 if ((tf->lbam == 0x69) && (tf->lbah == 0x96)) {
1082 DPRINTK("found PMP device by sig\n");
1086 if ((tf->lbam == 0x3c) && (tf->lbah == 0xc3)) {
1087 DPRINTK("found SEMB device by sig (could be ATA device)\n");
1088 return ATA_DEV_SEMB;
1091 DPRINTK("unknown device\n");
1092 return ATA_DEV_UNKNOWN;
1096 * ata_id_string - Convert IDENTIFY DEVICE page into string
1097 * @id: IDENTIFY DEVICE results we will examine
1098 * @s: string into which data is output
1099 * @ofs: offset into identify device page
1100 * @len: length of string to return. must be an even number.
1102 * The strings in the IDENTIFY DEVICE page are broken up into
1103 * 16-bit chunks. Run through the string, and output each
1104 * 8-bit chunk linearly, regardless of platform.
1110 void ata_id_string(const u16 *id, unsigned char *s,
1111 unsigned int ofs, unsigned int len)
1132 * ata_id_c_string - Convert IDENTIFY DEVICE page into C string
1133 * @id: IDENTIFY DEVICE results we will examine
1134 * @s: string into which data is output
1135 * @ofs: offset into identify device page
1136 * @len: length of string to return. must be an odd number.
1138 * This function is identical to ata_id_string except that it
1139 * trims trailing spaces and terminates the resulting string with
1140 * null. @len must be actual maximum length (even number) + 1.
1145 void ata_id_c_string(const u16 *id, unsigned char *s,
1146 unsigned int ofs, unsigned int len)
1150 ata_id_string(id, s, ofs, len - 1);
1152 p = s + strnlen(s, len - 1);
1153 while (p > s && p[-1] == ' ')
1158 static u64 ata_id_n_sectors(const u16 *id)
1160 if (ata_id_has_lba(id)) {
1161 if (ata_id_has_lba48(id))
1162 return ata_id_u64(id, ATA_ID_LBA_CAPACITY_2);
1164 return ata_id_u32(id, ATA_ID_LBA_CAPACITY);
1166 if (ata_id_current_chs_valid(id))
1167 return id[ATA_ID_CUR_CYLS] * id[ATA_ID_CUR_HEADS] *
1168 id[ATA_ID_CUR_SECTORS];
1170 return id[ATA_ID_CYLS] * id[ATA_ID_HEADS] *
1175 u64 ata_tf_to_lba48(const struct ata_taskfile *tf)
1179 sectors |= ((u64)(tf->hob_lbah & 0xff)) << 40;
1180 sectors |= ((u64)(tf->hob_lbam & 0xff)) << 32;
1181 sectors |= ((u64)(tf->hob_lbal & 0xff)) << 24;
1182 sectors |= (tf->lbah & 0xff) << 16;
1183 sectors |= (tf->lbam & 0xff) << 8;
1184 sectors |= (tf->lbal & 0xff);
1189 u64 ata_tf_to_lba(const struct ata_taskfile *tf)
1193 sectors |= (tf->device & 0x0f) << 24;
1194 sectors |= (tf->lbah & 0xff) << 16;
1195 sectors |= (tf->lbam & 0xff) << 8;
1196 sectors |= (tf->lbal & 0xff);
1202 * ata_read_native_max_address - Read native max address
1203 * @dev: target device
1204 * @max_sectors: out parameter for the result native max address
1206 * Perform an LBA48 or LBA28 native size query upon the device in
1210 * 0 on success, -EACCES if command is aborted by the drive.
1211 * -EIO on other errors.
1213 static int ata_read_native_max_address(struct ata_device *dev, u64 *max_sectors)
1215 unsigned int err_mask;
1216 struct ata_taskfile tf;
1217 int lba48 = ata_id_has_lba48(dev->id);
1219 ata_tf_init(dev, &tf);
1221 /* always clear all address registers */
1222 tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
1225 tf.command = ATA_CMD_READ_NATIVE_MAX_EXT;
1226 tf.flags |= ATA_TFLAG_LBA48;
1228 tf.command = ATA_CMD_READ_NATIVE_MAX;
1230 tf.protocol |= ATA_PROT_NODATA;
1231 tf.device |= ATA_LBA;
1233 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
1236 "failed to read native max address (err_mask=0x%x)\n",
1238 if (err_mask == AC_ERR_DEV && (tf.feature & ATA_ABORTED))
1244 *max_sectors = ata_tf_to_lba48(&tf) + 1;
1246 *max_sectors = ata_tf_to_lba(&tf) + 1;
1247 if (dev->horkage & ATA_HORKAGE_HPA_SIZE)
1253 * ata_set_max_sectors - Set max sectors
1254 * @dev: target device
1255 * @new_sectors: new max sectors value to set for the device
1257 * Set max sectors of @dev to @new_sectors.
1260 * 0 on success, -EACCES if command is aborted or denied (due to
1261 * previous non-volatile SET_MAX) by the drive. -EIO on other
1264 static int ata_set_max_sectors(struct ata_device *dev, u64 new_sectors)
1266 unsigned int err_mask;
1267 struct ata_taskfile tf;
1268 int lba48 = ata_id_has_lba48(dev->id);
1272 ata_tf_init(dev, &tf);
1274 tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
1277 tf.command = ATA_CMD_SET_MAX_EXT;
1278 tf.flags |= ATA_TFLAG_LBA48;
1280 tf.hob_lbal = (new_sectors >> 24) & 0xff;
1281 tf.hob_lbam = (new_sectors >> 32) & 0xff;
1282 tf.hob_lbah = (new_sectors >> 40) & 0xff;
1284 tf.command = ATA_CMD_SET_MAX;
1286 tf.device |= (new_sectors >> 24) & 0xf;
1289 tf.protocol |= ATA_PROT_NODATA;
1290 tf.device |= ATA_LBA;
1292 tf.lbal = (new_sectors >> 0) & 0xff;
1293 tf.lbam = (new_sectors >> 8) & 0xff;
1294 tf.lbah = (new_sectors >> 16) & 0xff;
1296 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
1299 "failed to set max address (err_mask=0x%x)\n",
1301 if (err_mask == AC_ERR_DEV &&
1302 (tf.feature & (ATA_ABORTED | ATA_IDNF)))
1311 * ata_hpa_resize - Resize a device with an HPA set
1312 * @dev: Device to resize
1314 * Read the size of an LBA28 or LBA48 disk with HPA features and resize
1315 * it if required to the full size of the media. The caller must check
1316 * the drive has the HPA feature set enabled.
1319 * 0 on success, -errno on failure.
1321 static int ata_hpa_resize(struct ata_device *dev)
1323 struct ata_eh_context *ehc = &dev->link->eh_context;
1324 int print_info = ehc->i.flags & ATA_EHI_PRINTINFO;
1325 bool unlock_hpa = ata_ignore_hpa || dev->flags & ATA_DFLAG_UNLOCK_HPA;
1326 u64 sectors = ata_id_n_sectors(dev->id);
1330 /* do we need to do it? */
1331 if (dev->class != ATA_DEV_ATA ||
1332 !ata_id_has_lba(dev->id) || !ata_id_hpa_enabled(dev->id) ||
1333 (dev->horkage & ATA_HORKAGE_BROKEN_HPA))
1336 /* read native max address */
1337 rc = ata_read_native_max_address(dev, &native_sectors);
1339 /* If device aborted the command or HPA isn't going to
1340 * be unlocked, skip HPA resizing.
1342 if (rc == -EACCES || !unlock_hpa) {
1344 "HPA support seems broken, skipping HPA handling\n");
1345 dev->horkage |= ATA_HORKAGE_BROKEN_HPA;
1347 /* we can continue if device aborted the command */
1354 dev->n_native_sectors = native_sectors;
1356 /* nothing to do? */
1357 if (native_sectors <= sectors || !unlock_hpa) {
1358 if (!print_info || native_sectors == sectors)
1361 if (native_sectors > sectors)
1363 "HPA detected: current %llu, native %llu\n",
1364 (unsigned long long)sectors,
1365 (unsigned long long)native_sectors);
1366 else if (native_sectors < sectors)
1368 "native sectors (%llu) is smaller than sectors (%llu)\n",
1369 (unsigned long long)native_sectors,
1370 (unsigned long long)sectors);
1374 /* let's unlock HPA */
1375 rc = ata_set_max_sectors(dev, native_sectors);
1376 if (rc == -EACCES) {
1377 /* if device aborted the command, skip HPA resizing */
1379 "device aborted resize (%llu -> %llu), skipping HPA handling\n",
1380 (unsigned long long)sectors,
1381 (unsigned long long)native_sectors);
1382 dev->horkage |= ATA_HORKAGE_BROKEN_HPA;
1387 /* re-read IDENTIFY data */
1388 rc = ata_dev_reread_id(dev, 0);
1391 "failed to re-read IDENTIFY data after HPA resizing\n");
1396 u64 new_sectors = ata_id_n_sectors(dev->id);
1398 "HPA unlocked: %llu -> %llu, native %llu\n",
1399 (unsigned long long)sectors,
1400 (unsigned long long)new_sectors,
1401 (unsigned long long)native_sectors);
1408 * ata_dump_id - IDENTIFY DEVICE info debugging output
1409 * @id: IDENTIFY DEVICE page to dump
1411 * Dump selected 16-bit words from the given IDENTIFY DEVICE
1418 static inline void ata_dump_id(const u16 *id)
1420 DPRINTK("49==0x%04x "
1430 DPRINTK("80==0x%04x "
1440 DPRINTK("88==0x%04x "
1447 * ata_id_xfermask - Compute xfermask from the given IDENTIFY data
1448 * @id: IDENTIFY data to compute xfer mask from
1450 * Compute the xfermask for this device. This is not as trivial
1451 * as it seems if we must consider early devices correctly.
1453 * FIXME: pre IDE drive timing (do we care ?).
1461 unsigned long ata_id_xfermask(const u16 *id)
1463 unsigned long pio_mask, mwdma_mask, udma_mask;
1465 /* Usual case. Word 53 indicates word 64 is valid */
1466 if (id[ATA_ID_FIELD_VALID] & (1 << 1)) {
1467 pio_mask = id[ATA_ID_PIO_MODES] & 0x03;
1471 /* If word 64 isn't valid then Word 51 high byte holds
1472 * the PIO timing number for the maximum. Turn it into
1475 u8 mode = (id[ATA_ID_OLD_PIO_MODES] >> 8) & 0xFF;
1476 if (mode < 5) /* Valid PIO range */
1477 pio_mask = (2 << mode) - 1;
1481 /* But wait.. there's more. Design your standards by
1482 * committee and you too can get a free iordy field to
1483 * process. However its the speeds not the modes that
1484 * are supported... Note drivers using the timing API
1485 * will get this right anyway
1489 mwdma_mask = id[ATA_ID_MWDMA_MODES] & 0x07;
1491 if (ata_id_is_cfa(id)) {
1493 * Process compact flash extended modes
1495 int pio = (id[ATA_ID_CFA_MODES] >> 0) & 0x7;
1496 int dma = (id[ATA_ID_CFA_MODES] >> 3) & 0x7;
1499 pio_mask |= (1 << 5);
1501 pio_mask |= (1 << 6);
1503 mwdma_mask |= (1 << 3);
1505 mwdma_mask |= (1 << 4);
1509 if (id[ATA_ID_FIELD_VALID] & (1 << 2))
1510 udma_mask = id[ATA_ID_UDMA_MODES] & 0xff;
1512 return ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask);
1515 static void ata_qc_complete_internal(struct ata_queued_cmd *qc)
1517 struct completion *waiting = qc->private_data;
1523 * ata_exec_internal_sg - execute libata internal command
1524 * @dev: Device to which the command is sent
1525 * @tf: Taskfile registers for the command and the result
1526 * @cdb: CDB for packet command
1527 * @dma_dir: Data tranfer direction of the command
1528 * @sgl: sg list for the data buffer of the command
1529 * @n_elem: Number of sg entries
1530 * @timeout: Timeout in msecs (0 for default)
1532 * Executes libata internal command with timeout. @tf contains
1533 * command on entry and result on return. Timeout and error
1534 * conditions are reported via return value. No recovery action
1535 * is taken after a command times out. It's caller's duty to
1536 * clean up after timeout.
1539 * None. Should be called with kernel context, might sleep.
1542 * Zero on success, AC_ERR_* mask on failure
1544 unsigned ata_exec_internal_sg(struct ata_device *dev,
1545 struct ata_taskfile *tf, const u8 *cdb,
1546 int dma_dir, struct scatterlist *sgl,
1547 unsigned int n_elem, unsigned long timeout)
1549 struct ata_link *link = dev->link;
1550 struct ata_port *ap = link->ap;
1551 u8 command = tf->command;
1552 int auto_timeout = 0;
1553 struct ata_queued_cmd *qc;
1554 unsigned int tag, preempted_tag;
1555 u32 preempted_sactive, preempted_qc_active;
1556 int preempted_nr_active_links;
1557 DECLARE_COMPLETION_ONSTACK(wait);
1558 unsigned long flags;
1559 unsigned int err_mask;
1562 spin_lock_irqsave(ap->lock, flags);
1564 /* no internal command while frozen */
1565 if (ap->pflags & ATA_PFLAG_FROZEN) {
1566 spin_unlock_irqrestore(ap->lock, flags);
1567 return AC_ERR_SYSTEM;
1570 /* initialize internal qc */
1572 /* XXX: Tag 0 is used for drivers with legacy EH as some
1573 * drivers choke if any other tag is given. This breaks
1574 * ata_tag_internal() test for those drivers. Don't use new
1575 * EH stuff without converting to it.
1577 if (ap->ops->error_handler)
1578 tag = ATA_TAG_INTERNAL;
1582 if (test_and_set_bit(tag, &ap->qc_allocated))
1584 qc = __ata_qc_from_tag(ap, tag);
1592 preempted_tag = link->active_tag;
1593 preempted_sactive = link->sactive;
1594 preempted_qc_active = ap->qc_active;
1595 preempted_nr_active_links = ap->nr_active_links;
1596 link->active_tag = ATA_TAG_POISON;
1599 ap->nr_active_links = 0;
1601 /* prepare & issue qc */
1604 memcpy(qc->cdb, cdb, ATAPI_CDB_LEN);
1605 qc->flags |= ATA_QCFLAG_RESULT_TF;
1606 qc->dma_dir = dma_dir;
1607 if (dma_dir != DMA_NONE) {
1608 unsigned int i, buflen = 0;
1609 struct scatterlist *sg;
1611 for_each_sg(sgl, sg, n_elem, i)
1612 buflen += sg->length;
1614 ata_sg_init(qc, sgl, n_elem);
1615 qc->nbytes = buflen;
1618 qc->private_data = &wait;
1619 qc->complete_fn = ata_qc_complete_internal;
1623 spin_unlock_irqrestore(ap->lock, flags);
1626 if (ata_probe_timeout)
1627 timeout = ata_probe_timeout * 1000;
1629 timeout = ata_internal_cmd_timeout(dev, command);
1634 if (ap->ops->error_handler)
1637 rc = wait_for_completion_timeout(&wait, msecs_to_jiffies(timeout));
1639 if (ap->ops->error_handler)
1642 ata_sff_flush_pio_task(ap);
1645 spin_lock_irqsave(ap->lock, flags);
1647 /* We're racing with irq here. If we lose, the
1648 * following test prevents us from completing the qc
1649 * twice. If we win, the port is frozen and will be
1650 * cleaned up by ->post_internal_cmd().
1652 if (qc->flags & ATA_QCFLAG_ACTIVE) {
1653 qc->err_mask |= AC_ERR_TIMEOUT;
1655 if (ap->ops->error_handler)
1656 ata_port_freeze(ap);
1658 ata_qc_complete(qc);
1660 if (ata_msg_warn(ap))
1661 ata_dev_warn(dev, "qc timeout (cmd 0x%x)\n",
1665 spin_unlock_irqrestore(ap->lock, flags);
1668 /* do post_internal_cmd */
1669 if (ap->ops->post_internal_cmd)
1670 ap->ops->post_internal_cmd(qc);
1672 /* perform minimal error analysis */
1673 if (qc->flags & ATA_QCFLAG_FAILED) {
1674 if (qc->result_tf.command & (ATA_ERR | ATA_DF))
1675 qc->err_mask |= AC_ERR_DEV;
1678 qc->err_mask |= AC_ERR_OTHER;
1680 if (qc->err_mask & ~AC_ERR_OTHER)
1681 qc->err_mask &= ~AC_ERR_OTHER;
1685 spin_lock_irqsave(ap->lock, flags);
1687 *tf = qc->result_tf;
1688 err_mask = qc->err_mask;
1691 link->active_tag = preempted_tag;
1692 link->sactive = preempted_sactive;
1693 ap->qc_active = preempted_qc_active;
1694 ap->nr_active_links = preempted_nr_active_links;
1696 spin_unlock_irqrestore(ap->lock, flags);
1698 if ((err_mask & AC_ERR_TIMEOUT) && auto_timeout)
1699 ata_internal_cmd_timed_out(dev, command);
1705 * ata_exec_internal - execute libata internal command
1706 * @dev: Device to which the command is sent
1707 * @tf: Taskfile registers for the command and the result
1708 * @cdb: CDB for packet command
1709 * @dma_dir: Data tranfer direction of the command
1710 * @buf: Data buffer of the command
1711 * @buflen: Length of data buffer
1712 * @timeout: Timeout in msecs (0 for default)
1714 * Wrapper around ata_exec_internal_sg() which takes simple
1715 * buffer instead of sg list.
1718 * None. Should be called with kernel context, might sleep.
1721 * Zero on success, AC_ERR_* mask on failure
1723 unsigned ata_exec_internal(struct ata_device *dev,
1724 struct ata_taskfile *tf, const u8 *cdb,
1725 int dma_dir, void *buf, unsigned int buflen,
1726 unsigned long timeout)
1728 struct scatterlist *psg = NULL, sg;
1729 unsigned int n_elem = 0;
1731 if (dma_dir != DMA_NONE) {
1733 sg_init_one(&sg, buf, buflen);
1738 return ata_exec_internal_sg(dev, tf, cdb, dma_dir, psg, n_elem,
1743 * ata_do_simple_cmd - execute simple internal command
1744 * @dev: Device to which the command is sent
1745 * @cmd: Opcode to execute
1747 * Execute a 'simple' command, that only consists of the opcode
1748 * 'cmd' itself, without filling any other registers
1751 * Kernel thread context (may sleep).
1754 * Zero on success, AC_ERR_* mask on failure
1756 unsigned int ata_do_simple_cmd(struct ata_device *dev, u8 cmd)
1758 struct ata_taskfile tf;
1760 ata_tf_init(dev, &tf);
1763 tf.flags |= ATA_TFLAG_DEVICE;
1764 tf.protocol = ATA_PROT_NODATA;
1766 return ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
1770 * ata_pio_need_iordy - check if iordy needed
1773 * Check if the current speed of the device requires IORDY. Used
1774 * by various controllers for chip configuration.
1776 unsigned int ata_pio_need_iordy(const struct ata_device *adev)
1778 /* Don't set IORDY if we're preparing for reset. IORDY may
1779 * lead to controller lock up on certain controllers if the
1780 * port is not occupied. See bko#11703 for details.
1782 if (adev->link->ap->pflags & ATA_PFLAG_RESETTING)
1784 /* Controller doesn't support IORDY. Probably a pointless
1785 * check as the caller should know this.
1787 if (adev->link->ap->flags & ATA_FLAG_NO_IORDY)
1789 /* CF spec. r4.1 Table 22 says no iordy on PIO5 and PIO6. */
1790 if (ata_id_is_cfa(adev->id)
1791 && (adev->pio_mode == XFER_PIO_5 || adev->pio_mode == XFER_PIO_6))
1793 /* PIO3 and higher it is mandatory */
1794 if (adev->pio_mode > XFER_PIO_2)
1796 /* We turn it on when possible */
1797 if (ata_id_has_iordy(adev->id))
1803 * ata_pio_mask_no_iordy - Return the non IORDY mask
1806 * Compute the highest mode possible if we are not using iordy. Return
1807 * -1 if no iordy mode is available.
1809 static u32 ata_pio_mask_no_iordy(const struct ata_device *adev)
1811 /* If we have no drive specific rule, then PIO 2 is non IORDY */
1812 if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE */
1813 u16 pio = adev->id[ATA_ID_EIDE_PIO];
1814 /* Is the speed faster than the drive allows non IORDY ? */
1816 /* This is cycle times not frequency - watch the logic! */
1817 if (pio > 240) /* PIO2 is 240nS per cycle */
1818 return 3 << ATA_SHIFT_PIO;
1819 return 7 << ATA_SHIFT_PIO;
1822 return 3 << ATA_SHIFT_PIO;
1826 * ata_do_dev_read_id - default ID read method
1828 * @tf: proposed taskfile
1831 * Issue the identify taskfile and hand back the buffer containing
1832 * identify data. For some RAID controllers and for pre ATA devices
1833 * this function is wrapped or replaced by the driver
1835 unsigned int ata_do_dev_read_id(struct ata_device *dev,
1836 struct ata_taskfile *tf, u16 *id)
1838 return ata_exec_internal(dev, tf, NULL, DMA_FROM_DEVICE,
1839 id, sizeof(id[0]) * ATA_ID_WORDS, 0);
1843 * ata_dev_read_id - Read ID data from the specified device
1844 * @dev: target device
1845 * @p_class: pointer to class of the target device (may be changed)
1846 * @flags: ATA_READID_* flags
1847 * @id: buffer to read IDENTIFY data into
1849 * Read ID data from the specified device. ATA_CMD_ID_ATA is
1850 * performed on ATA devices and ATA_CMD_ID_ATAPI on ATAPI
1851 * devices. This function also issues ATA_CMD_INIT_DEV_PARAMS
1852 * for pre-ATA4 drives.
1854 * FIXME: ATA_CMD_ID_ATA is optional for early drives and right
1855 * now we abort if we hit that case.
1858 * Kernel thread context (may sleep)
1861 * 0 on success, -errno otherwise.
1863 int ata_dev_read_id(struct ata_device *dev, unsigned int *p_class,
1864 unsigned int flags, u16 *id)
1866 struct ata_port *ap = dev->link->ap;
1867 unsigned int class = *p_class;
1868 struct ata_taskfile tf;
1869 unsigned int err_mask = 0;
1871 bool is_semb = class == ATA_DEV_SEMB;
1872 int may_fallback = 1, tried_spinup = 0;
1875 if (ata_msg_ctl(ap))
1876 ata_dev_dbg(dev, "%s: ENTER\n", __func__);
1879 ata_tf_init(dev, &tf);
1883 class = ATA_DEV_ATA; /* some hard drives report SEMB sig */
1885 tf.command = ATA_CMD_ID_ATA;
1888 tf.command = ATA_CMD_ID_ATAPI;
1892 reason = "unsupported class";
1896 tf.protocol = ATA_PROT_PIO;
1898 /* Some devices choke if TF registers contain garbage. Make
1899 * sure those are properly initialized.
1901 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
1903 /* Device presence detection is unreliable on some
1904 * controllers. Always poll IDENTIFY if available.
1906 tf.flags |= ATA_TFLAG_POLLING;
1908 if (ap->ops->read_id)
1909 err_mask = ap->ops->read_id(dev, &tf, id);
1911 err_mask = ata_do_dev_read_id(dev, &tf, id);
1914 if (err_mask & AC_ERR_NODEV_HINT) {
1915 ata_dev_dbg(dev, "NODEV after polling detection\n");
1921 "IDENTIFY failed on device w/ SEMB sig, disabled\n");
1922 /* SEMB is not supported yet */
1923 *p_class = ATA_DEV_SEMB_UNSUP;
1927 if ((err_mask == AC_ERR_DEV) && (tf.feature & ATA_ABORTED)) {
1928 /* Device or controller might have reported
1929 * the wrong device class. Give a shot at the
1930 * other IDENTIFY if the current one is
1931 * aborted by the device.
1936 if (class == ATA_DEV_ATA)
1937 class = ATA_DEV_ATAPI;
1939 class = ATA_DEV_ATA;
1943 /* Control reaches here iff the device aborted
1944 * both flavors of IDENTIFYs which happens
1945 * sometimes with phantom devices.
1948 "both IDENTIFYs aborted, assuming NODEV\n");
1953 reason = "I/O error";
1957 if (dev->horkage & ATA_HORKAGE_DUMP_ID) {
1958 ata_dev_dbg(dev, "dumping IDENTIFY data, "
1959 "class=%d may_fallback=%d tried_spinup=%d\n",
1960 class, may_fallback, tried_spinup);
1961 print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET,
1962 16, 2, id, ATA_ID_WORDS * sizeof(*id), true);
1965 /* Falling back doesn't make sense if ID data was read
1966 * successfully at least once.
1970 swap_buf_le16(id, ATA_ID_WORDS);
1974 reason = "device reports invalid type";
1976 if (class == ATA_DEV_ATA) {
1977 if (!ata_id_is_ata(id) && !ata_id_is_cfa(id))
1979 if (ap->host->flags & ATA_HOST_IGNORE_ATA &&
1980 ata_id_is_ata(id)) {
1982 "host indicates ignore ATA devices, ignored\n");
1986 if (ata_id_is_ata(id))
1990 if (!tried_spinup && (id[2] == 0x37c8 || id[2] == 0x738c)) {
1993 * Drive powered-up in standby mode, and requires a specific
1994 * SET_FEATURES spin-up subcommand before it will accept
1995 * anything other than the original IDENTIFY command.
1997 err_mask = ata_dev_set_feature(dev, SETFEATURES_SPINUP, 0);
1998 if (err_mask && id[2] != 0x738c) {
2000 reason = "SPINUP failed";
2004 * If the drive initially returned incomplete IDENTIFY info,
2005 * we now must reissue the IDENTIFY command.
2007 if (id[2] == 0x37c8)
2011 if ((flags & ATA_READID_POSTRESET) && class == ATA_DEV_ATA) {
2013 * The exact sequence expected by certain pre-ATA4 drives is:
2015 * IDENTIFY (optional in early ATA)
2016 * INITIALIZE DEVICE PARAMETERS (later IDE and ATA)
2018 * Some drives were very specific about that exact sequence.
2020 * Note that ATA4 says lba is mandatory so the second check
2021 * should never trigger.
2023 if (ata_id_major_version(id) < 4 || !ata_id_has_lba(id)) {
2024 err_mask = ata_dev_init_params(dev, id[3], id[6]);
2027 reason = "INIT_DEV_PARAMS failed";
2031 /* current CHS translation info (id[53-58]) might be
2032 * changed. reread the identify device info.
2034 flags &= ~ATA_READID_POSTRESET;
2044 if (ata_msg_warn(ap))
2045 ata_dev_warn(dev, "failed to IDENTIFY (%s, err_mask=0x%x)\n",
2050 static int ata_do_link_spd_horkage(struct ata_device *dev)
2052 struct ata_link *plink = ata_dev_phys_link(dev);
2053 u32 target, target_limit;
2055 if (!sata_scr_valid(plink))
2058 if (dev->horkage & ATA_HORKAGE_1_5_GBPS)
2063 target_limit = (1 << target) - 1;
2065 /* if already on stricter limit, no need to push further */
2066 if (plink->sata_spd_limit <= target_limit)
2069 plink->sata_spd_limit = target_limit;
2071 /* Request another EH round by returning -EAGAIN if link is
2072 * going faster than the target speed. Forward progress is
2073 * guaranteed by setting sata_spd_limit to target_limit above.
2075 if (plink->sata_spd > target) {
2076 ata_dev_info(dev, "applying link speed limit horkage to %s\n",
2077 sata_spd_string(target));
2083 static inline u8 ata_dev_knobble(struct ata_device *dev)
2085 struct ata_port *ap = dev->link->ap;
2087 if (ata_dev_blacklisted(dev) & ATA_HORKAGE_BRIDGE_OK)
2090 return ((ap->cbl == ATA_CBL_SATA) && (!ata_id_is_sata(dev->id)));
2093 static int ata_dev_config_ncq(struct ata_device *dev,
2094 char *desc, size_t desc_sz)
2096 struct ata_port *ap = dev->link->ap;
2097 int hdepth = 0, ddepth = ata_id_queue_depth(dev->id);
2098 unsigned int err_mask;
2101 if (!ata_id_has_ncq(dev->id)) {
2105 if (dev->horkage & ATA_HORKAGE_NONCQ) {
2106 snprintf(desc, desc_sz, "NCQ (not used)");
2109 if (ap->flags & ATA_FLAG_NCQ) {
2110 hdepth = min(ap->scsi_host->can_queue, ATA_MAX_QUEUE - 1);
2111 dev->flags |= ATA_DFLAG_NCQ;
2114 if (!(dev->horkage & ATA_HORKAGE_BROKEN_FPDMA_AA) &&
2115 (ap->flags & ATA_FLAG_FPDMA_AA) &&
2116 ata_id_has_fpdma_aa(dev->id)) {
2117 err_mask = ata_dev_set_feature(dev, SETFEATURES_SATA_ENABLE,
2121 "failed to enable AA (error_mask=0x%x)\n",
2123 if (err_mask != AC_ERR_DEV) {
2124 dev->horkage |= ATA_HORKAGE_BROKEN_FPDMA_AA;
2131 if (hdepth >= ddepth)
2132 snprintf(desc, desc_sz, "NCQ (depth %d)%s", ddepth, aa_desc);
2134 snprintf(desc, desc_sz, "NCQ (depth %d/%d)%s", hdepth,
2140 * ata_dev_configure - Configure the specified ATA/ATAPI device
2141 * @dev: Target device to configure
2143 * Configure @dev according to @dev->id. Generic and low-level
2144 * driver specific fixups are also applied.
2147 * Kernel thread context (may sleep)
2150 * 0 on success, -errno otherwise
2152 int ata_dev_configure(struct ata_device *dev)
2154 struct ata_port *ap = dev->link->ap;
2155 struct ata_eh_context *ehc = &dev->link->eh_context;
2156 int print_info = ehc->i.flags & ATA_EHI_PRINTINFO;
2157 const u16 *id = dev->id;
2158 unsigned long xfer_mask;
2159 unsigned int err_mask;
2160 char revbuf[7]; /* XYZ-99\0 */
2161 char fwrevbuf[ATA_ID_FW_REV_LEN+1];
2162 char modelbuf[ATA_ID_PROD_LEN+1];
2165 if (!ata_dev_enabled(dev) && ata_msg_info(ap)) {
2166 ata_dev_info(dev, "%s: ENTER/EXIT -- nodev\n", __func__);
2170 if (ata_msg_probe(ap))
2171 ata_dev_dbg(dev, "%s: ENTER\n", __func__);
2174 dev->horkage |= ata_dev_blacklisted(dev);
2175 ata_force_horkage(dev);
2177 if (dev->horkage & ATA_HORKAGE_DISABLE) {
2178 ata_dev_info(dev, "unsupported device, disabling\n");
2179 ata_dev_disable(dev);
2183 if ((!atapi_enabled || (ap->flags & ATA_FLAG_NO_ATAPI)) &&
2184 dev->class == ATA_DEV_ATAPI) {
2185 ata_dev_warn(dev, "WARNING: ATAPI is %s, device ignored\n",
2186 atapi_enabled ? "not supported with this driver"
2188 ata_dev_disable(dev);
2192 rc = ata_do_link_spd_horkage(dev);
2196 /* let ACPI work its magic */
2197 rc = ata_acpi_on_devcfg(dev);
2201 /* massage HPA, do it early as it might change IDENTIFY data */
2202 rc = ata_hpa_resize(dev);
2206 /* print device capabilities */
2207 if (ata_msg_probe(ap))
2209 "%s: cfg 49:%04x 82:%04x 83:%04x 84:%04x "
2210 "85:%04x 86:%04x 87:%04x 88:%04x\n",
2212 id[49], id[82], id[83], id[84],
2213 id[85], id[86], id[87], id[88]);
2215 /* initialize to-be-configured parameters */
2216 dev->flags &= ~ATA_DFLAG_CFG_MASK;
2217 dev->max_sectors = 0;
2223 dev->multi_count = 0;
2226 * common ATA, ATAPI feature tests
2229 /* find max transfer mode; for printk only */
2230 xfer_mask = ata_id_xfermask(id);
2232 if (ata_msg_probe(ap))
2235 /* SCSI only uses 4-char revisions, dump full 8 chars from ATA */
2236 ata_id_c_string(dev->id, fwrevbuf, ATA_ID_FW_REV,
2239 ata_id_c_string(dev->id, modelbuf, ATA_ID_PROD,
2242 /* ATA-specific feature tests */
2243 if (dev->class == ATA_DEV_ATA) {
2244 if (ata_id_is_cfa(id)) {
2245 /* CPRM may make this media unusable */
2246 if (id[ATA_ID_CFA_KEY_MGMT] & 1)
2248 "supports DRM functions and may not be fully accessible\n");
2249 snprintf(revbuf, 7, "CFA");
2251 snprintf(revbuf, 7, "ATA-%d", ata_id_major_version(id));
2252 /* Warn the user if the device has TPM extensions */
2253 if (ata_id_has_tpm(id))
2255 "supports DRM functions and may not be fully accessible\n");
2258 dev->n_sectors = ata_id_n_sectors(id);
2260 /* get current R/W Multiple count setting */
2261 if ((dev->id[47] >> 8) == 0x80 && (dev->id[59] & 0x100)) {
2262 unsigned int max = dev->id[47] & 0xff;
2263 unsigned int cnt = dev->id[59] & 0xff;
2264 /* only recognize/allow powers of two here */
2265 if (is_power_of_2(max) && is_power_of_2(cnt))
2267 dev->multi_count = cnt;
2270 if (ata_id_has_lba(id)) {
2271 const char *lba_desc;
2275 dev->flags |= ATA_DFLAG_LBA;
2276 if (ata_id_has_lba48(id)) {
2277 dev->flags |= ATA_DFLAG_LBA48;
2280 if (dev->n_sectors >= (1UL << 28) &&
2281 ata_id_has_flush_ext(id))
2282 dev->flags |= ATA_DFLAG_FLUSH_EXT;
2286 rc = ata_dev_config_ncq(dev, ncq_desc, sizeof(ncq_desc));
2290 /* print device info to dmesg */
2291 if (ata_msg_drv(ap) && print_info) {
2292 ata_dev_info(dev, "%s: %s, %s, max %s\n",
2293 revbuf, modelbuf, fwrevbuf,
2294 ata_mode_string(xfer_mask));
2296 "%llu sectors, multi %u: %s %s\n",
2297 (unsigned long long)dev->n_sectors,
2298 dev->multi_count, lba_desc, ncq_desc);
2303 /* Default translation */
2304 dev->cylinders = id[1];
2306 dev->sectors = id[6];
2308 if (ata_id_current_chs_valid(id)) {
2309 /* Current CHS translation is valid. */
2310 dev->cylinders = id[54];
2311 dev->heads = id[55];
2312 dev->sectors = id[56];
2315 /* print device info to dmesg */
2316 if (ata_msg_drv(ap) && print_info) {
2317 ata_dev_info(dev, "%s: %s, %s, max %s\n",
2318 revbuf, modelbuf, fwrevbuf,
2319 ata_mode_string(xfer_mask));
2321 "%llu sectors, multi %u, CHS %u/%u/%u\n",
2322 (unsigned long long)dev->n_sectors,
2323 dev->multi_count, dev->cylinders,
2324 dev->heads, dev->sectors);
2328 /* Check and mark DevSlp capability. Get DevSlp timing variables
2329 * from SATA Settings page of Identify Device Data Log.
2331 if (ata_id_has_devslp(dev->id)) {
2332 u8 sata_setting[ATA_SECT_SIZE];
2335 dev->flags |= ATA_DFLAG_DEVSLP;
2336 err_mask = ata_read_log_page(dev,
2337 ATA_LOG_SATA_ID_DEV_DATA,
2338 ATA_LOG_SATA_SETTINGS,
2343 "failed to get Identify Device Data, Emask 0x%x\n",
2346 for (i = 0; i < ATA_LOG_DEVSLP_SIZE; i++) {
2347 j = ATA_LOG_DEVSLP_OFFSET + i;
2348 dev->devslp_timing[i] = sata_setting[j];
2355 /* ATAPI-specific feature tests */
2356 else if (dev->class == ATA_DEV_ATAPI) {
2357 const char *cdb_intr_string = "";
2358 const char *atapi_an_string = "";
2359 const char *dma_dir_string = "";
2362 rc = atapi_cdb_len(id);
2363 if ((rc < 12) || (rc > ATAPI_CDB_LEN)) {
2364 if (ata_msg_warn(ap))
2365 ata_dev_warn(dev, "unsupported CDB len\n");
2369 dev->cdb_len = (unsigned int) rc;
2371 /* Enable ATAPI AN if both the host and device have
2372 * the support. If PMP is attached, SNTF is required
2373 * to enable ATAPI AN to discern between PHY status
2374 * changed notifications and ATAPI ANs.
2377 (ap->flags & ATA_FLAG_AN) && ata_id_has_atapi_AN(id) &&
2378 (!sata_pmp_attached(ap) ||
2379 sata_scr_read(&ap->link, SCR_NOTIFICATION, &sntf) == 0)) {
2380 /* issue SET feature command to turn this on */
2381 err_mask = ata_dev_set_feature(dev,
2382 SETFEATURES_SATA_ENABLE, SATA_AN);
2385 "failed to enable ATAPI AN (err_mask=0x%x)\n",
2388 dev->flags |= ATA_DFLAG_AN;
2389 atapi_an_string = ", ATAPI AN";
2393 if (ata_id_cdb_intr(dev->id)) {
2394 dev->flags |= ATA_DFLAG_CDB_INTR;
2395 cdb_intr_string = ", CDB intr";
2398 if (atapi_dmadir || atapi_id_dmadir(dev->id)) {
2399 dev->flags |= ATA_DFLAG_DMADIR;
2400 dma_dir_string = ", DMADIR";
2403 if (ata_id_has_da(dev->id))
2404 dev->flags |= ATA_DFLAG_DA;
2406 /* print device info to dmesg */
2407 if (ata_msg_drv(ap) && print_info)
2409 "ATAPI: %s, %s, max %s%s%s%s\n",
2411 ata_mode_string(xfer_mask),
2412 cdb_intr_string, atapi_an_string,
2416 /* determine max_sectors */
2417 dev->max_sectors = ATA_MAX_SECTORS;
2418 if (dev->flags & ATA_DFLAG_LBA48)
2419 dev->max_sectors = ATA_MAX_SECTORS_LBA48;
2421 /* Limit PATA drive on SATA cable bridge transfers to udma5,
2423 if (ata_dev_knobble(dev)) {
2424 if (ata_msg_drv(ap) && print_info)
2425 ata_dev_info(dev, "applying bridge limits\n");
2426 dev->udma_mask &= ATA_UDMA5;
2427 dev->max_sectors = ATA_MAX_SECTORS;
2430 if ((dev->class == ATA_DEV_ATAPI) &&
2431 (atapi_command_packet_set(id) == TYPE_TAPE)) {
2432 dev->max_sectors = ATA_MAX_SECTORS_TAPE;
2433 dev->horkage |= ATA_HORKAGE_STUCK_ERR;
2436 if (dev->horkage & ATA_HORKAGE_MAX_SEC_128)
2437 dev->max_sectors = min_t(unsigned int, ATA_MAX_SECTORS_128,
2440 if (ap->ops->dev_config)
2441 ap->ops->dev_config(dev);
2443 if (dev->horkage & ATA_HORKAGE_DIAGNOSTIC) {
2444 /* Let the user know. We don't want to disallow opens for
2445 rescue purposes, or in case the vendor is just a blithering
2446 idiot. Do this after the dev_config call as some controllers
2447 with buggy firmware may want to avoid reporting false device
2452 "Drive reports diagnostics failure. This may indicate a drive\n");
2454 "fault or invalid emulation. Contact drive vendor for information.\n");
2458 if ((dev->horkage & ATA_HORKAGE_FIRMWARE_WARN) && print_info) {
2459 ata_dev_warn(dev, "WARNING: device requires firmware update to be fully functional\n");
2460 ata_dev_warn(dev, " contact the vendor or visit http://ata.wiki.kernel.org\n");
2466 if (ata_msg_probe(ap))
2467 ata_dev_dbg(dev, "%s: EXIT, err\n", __func__);
2472 * ata_cable_40wire - return 40 wire cable type
2475 * Helper method for drivers which want to hardwire 40 wire cable
2479 int ata_cable_40wire(struct ata_port *ap)
2481 return ATA_CBL_PATA40;
2485 * ata_cable_80wire - return 80 wire cable type
2488 * Helper method for drivers which want to hardwire 80 wire cable
2492 int ata_cable_80wire(struct ata_port *ap)
2494 return ATA_CBL_PATA80;
2498 * ata_cable_unknown - return unknown PATA cable.
2501 * Helper method for drivers which have no PATA cable detection.
2504 int ata_cable_unknown(struct ata_port *ap)
2506 return ATA_CBL_PATA_UNK;
2510 * ata_cable_ignore - return ignored PATA cable.
2513 * Helper method for drivers which don't use cable type to limit
2516 int ata_cable_ignore(struct ata_port *ap)
2518 return ATA_CBL_PATA_IGN;
2522 * ata_cable_sata - return SATA cable type
2525 * Helper method for drivers which have SATA cables
2528 int ata_cable_sata(struct ata_port *ap)
2530 return ATA_CBL_SATA;
2534 * ata_bus_probe - Reset and probe ATA bus
2537 * Master ATA bus probing function. Initiates a hardware-dependent
2538 * bus reset, then attempts to identify any devices found on
2542 * PCI/etc. bus probe sem.
2545 * Zero on success, negative errno otherwise.
2548 int ata_bus_probe(struct ata_port *ap)
2550 unsigned int classes[ATA_MAX_DEVICES];
2551 int tries[ATA_MAX_DEVICES];
2553 struct ata_device *dev;
2555 ata_for_each_dev(dev, &ap->link, ALL)
2556 tries[dev->devno] = ATA_PROBE_MAX_TRIES;
2559 ata_for_each_dev(dev, &ap->link, ALL) {
2560 /* If we issue an SRST then an ATA drive (not ATAPI)
2561 * may change configuration and be in PIO0 timing. If
2562 * we do a hard reset (or are coming from power on)
2563 * this is true for ATA or ATAPI. Until we've set a
2564 * suitable controller mode we should not touch the
2565 * bus as we may be talking too fast.
2567 dev->pio_mode = XFER_PIO_0;
2568 dev->dma_mode = 0xff;
2570 /* If the controller has a pio mode setup function
2571 * then use it to set the chipset to rights. Don't
2572 * touch the DMA setup as that will be dealt with when
2573 * configuring devices.
2575 if (ap->ops->set_piomode)
2576 ap->ops->set_piomode(ap, dev);
2579 /* reset and determine device classes */
2580 ap->ops->phy_reset(ap);
2582 ata_for_each_dev(dev, &ap->link, ALL) {
2583 if (dev->class != ATA_DEV_UNKNOWN)
2584 classes[dev->devno] = dev->class;
2586 classes[dev->devno] = ATA_DEV_NONE;
2588 dev->class = ATA_DEV_UNKNOWN;
2591 /* read IDENTIFY page and configure devices. We have to do the identify
2592 specific sequence bass-ackwards so that PDIAG- is released by
2595 ata_for_each_dev(dev, &ap->link, ALL_REVERSE) {
2596 if (tries[dev->devno])
2597 dev->class = classes[dev->devno];
2599 if (!ata_dev_enabled(dev))
2602 rc = ata_dev_read_id(dev, &dev->class, ATA_READID_POSTRESET,
2608 /* Now ask for the cable type as PDIAG- should have been released */
2609 if (ap->ops->cable_detect)
2610 ap->cbl = ap->ops->cable_detect(ap);
2612 /* We may have SATA bridge glue hiding here irrespective of
2613 * the reported cable types and sensed types. When SATA
2614 * drives indicate we have a bridge, we don't know which end
2615 * of the link the bridge is which is a problem.
2617 ata_for_each_dev(dev, &ap->link, ENABLED)
2618 if (ata_id_is_sata(dev->id))
2619 ap->cbl = ATA_CBL_SATA;
2621 /* After the identify sequence we can now set up the devices. We do
2622 this in the normal order so that the user doesn't get confused */
2624 ata_for_each_dev(dev, &ap->link, ENABLED) {
2625 ap->link.eh_context.i.flags |= ATA_EHI_PRINTINFO;
2626 rc = ata_dev_configure(dev);
2627 ap->link.eh_context.i.flags &= ~ATA_EHI_PRINTINFO;
2632 /* configure transfer mode */
2633 rc = ata_set_mode(&ap->link, &dev);
2637 ata_for_each_dev(dev, &ap->link, ENABLED)
2643 tries[dev->devno]--;
2647 /* eeek, something went very wrong, give up */
2648 tries[dev->devno] = 0;
2652 /* give it just one more chance */
2653 tries[dev->devno] = min(tries[dev->devno], 1);
2655 if (tries[dev->devno] == 1) {
2656 /* This is the last chance, better to slow
2657 * down than lose it.
2659 sata_down_spd_limit(&ap->link, 0);
2660 ata_down_xfermask_limit(dev, ATA_DNXFER_PIO);
2664 if (!tries[dev->devno])
2665 ata_dev_disable(dev);
2671 * sata_print_link_status - Print SATA link status
2672 * @link: SATA link to printk link status about
2674 * This function prints link speed and status of a SATA link.
2679 static void sata_print_link_status(struct ata_link *link)
2681 u32 sstatus, scontrol, tmp;
2683 if (sata_scr_read(link, SCR_STATUS, &sstatus))
2685 sata_scr_read(link, SCR_CONTROL, &scontrol);
2687 if (ata_phys_link_online(link)) {
2688 tmp = (sstatus >> 4) & 0xf;
2689 ata_link_info(link, "SATA link up %s (SStatus %X SControl %X)\n",
2690 sata_spd_string(tmp), sstatus, scontrol);
2692 ata_link_info(link, "SATA link down (SStatus %X SControl %X)\n",
2698 * ata_dev_pair - return other device on cable
2701 * Obtain the other device on the same cable, or if none is
2702 * present NULL is returned
2705 struct ata_device *ata_dev_pair(struct ata_device *adev)
2707 struct ata_link *link = adev->link;
2708 struct ata_device *pair = &link->device[1 - adev->devno];
2709 if (!ata_dev_enabled(pair))
2715 * sata_down_spd_limit - adjust SATA spd limit downward
2716 * @link: Link to adjust SATA spd limit for
2717 * @spd_limit: Additional limit
2719 * Adjust SATA spd limit of @link downward. Note that this
2720 * function only adjusts the limit. The change must be applied
2721 * using sata_set_spd().
2723 * If @spd_limit is non-zero, the speed is limited to equal to or
2724 * lower than @spd_limit if such speed is supported. If
2725 * @spd_limit is slower than any supported speed, only the lowest
2726 * supported speed is allowed.
2729 * Inherited from caller.
2732 * 0 on success, negative errno on failure
2734 int sata_down_spd_limit(struct ata_link *link, u32 spd_limit)
2736 u32 sstatus, spd, mask;
2739 if (!sata_scr_valid(link))
2742 /* If SCR can be read, use it to determine the current SPD.
2743 * If not, use cached value in link->sata_spd.
2745 rc = sata_scr_read(link, SCR_STATUS, &sstatus);
2746 if (rc == 0 && ata_sstatus_online(sstatus))
2747 spd = (sstatus >> 4) & 0xf;
2749 spd = link->sata_spd;
2751 mask = link->sata_spd_limit;
2755 /* unconditionally mask off the highest bit */
2756 bit = fls(mask) - 1;
2757 mask &= ~(1 << bit);
2759 /* Mask off all speeds higher than or equal to the current
2760 * one. Force 1.5Gbps if current SPD is not available.
2763 mask &= (1 << (spd - 1)) - 1;
2767 /* were we already at the bottom? */
2772 if (mask & ((1 << spd_limit) - 1))
2773 mask &= (1 << spd_limit) - 1;
2775 bit = ffs(mask) - 1;
2780 link->sata_spd_limit = mask;
2782 ata_link_warn(link, "limiting SATA link speed to %s\n",
2783 sata_spd_string(fls(mask)));
2788 static int __sata_set_spd_needed(struct ata_link *link, u32 *scontrol)
2790 struct ata_link *host_link = &link->ap->link;
2791 u32 limit, target, spd;
2793 limit = link->sata_spd_limit;
2795 /* Don't configure downstream link faster than upstream link.
2796 * It doesn't speed up anything and some PMPs choke on such
2799 if (!ata_is_host_link(link) && host_link->sata_spd)
2800 limit &= (1 << host_link->sata_spd) - 1;
2802 if (limit == UINT_MAX)
2805 target = fls(limit);
2807 spd = (*scontrol >> 4) & 0xf;
2808 *scontrol = (*scontrol & ~0xf0) | ((target & 0xf) << 4);
2810 return spd != target;
2814 * sata_set_spd_needed - is SATA spd configuration needed
2815 * @link: Link in question
2817 * Test whether the spd limit in SControl matches
2818 * @link->sata_spd_limit. This function is used to determine
2819 * whether hardreset is necessary to apply SATA spd
2823 * Inherited from caller.
2826 * 1 if SATA spd configuration is needed, 0 otherwise.
2828 static int sata_set_spd_needed(struct ata_link *link)
2832 if (sata_scr_read(link, SCR_CONTROL, &scontrol))
2835 return __sata_set_spd_needed(link, &scontrol);
2839 * sata_set_spd - set SATA spd according to spd limit
2840 * @link: Link to set SATA spd for
2842 * Set SATA spd of @link according to sata_spd_limit.
2845 * Inherited from caller.
2848 * 0 if spd doesn't need to be changed, 1 if spd has been
2849 * changed. Negative errno if SCR registers are inaccessible.
2851 int sata_set_spd(struct ata_link *link)
2856 if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
2859 if (!__sata_set_spd_needed(link, &scontrol))
2862 if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol)))
2869 * This mode timing computation functionality is ported over from
2870 * drivers/ide/ide-timing.h and was originally written by Vojtech Pavlik
2873 * PIO 0-4, MWDMA 0-2 and UDMA 0-6 timings (in nanoseconds).
2874 * These were taken from ATA/ATAPI-6 standard, rev 0a, except
2875 * for UDMA6, which is currently supported only by Maxtor drives.
2877 * For PIO 5/6 MWDMA 3/4 see the CFA specification 3.0.
2880 static const struct ata_timing ata_timing[] = {
2881 /* { XFER_PIO_SLOW, 120, 290, 240, 960, 290, 240, 0, 960, 0 }, */
2882 { XFER_PIO_0, 70, 290, 240, 600, 165, 150, 0, 600, 0 },
2883 { XFER_PIO_1, 50, 290, 93, 383, 125, 100, 0, 383, 0 },
2884 { XFER_PIO_2, 30, 290, 40, 330, 100, 90, 0, 240, 0 },
2885 { XFER_PIO_3, 30, 80, 70, 180, 80, 70, 0, 180, 0 },
2886 { XFER_PIO_4, 25, 70, 25, 120, 70, 25, 0, 120, 0 },
2887 { XFER_PIO_5, 15, 65, 25, 100, 65, 25, 0, 100, 0 },
2888 { XFER_PIO_6, 10, 55, 20, 80, 55, 20, 0, 80, 0 },
2890 { XFER_SW_DMA_0, 120, 0, 0, 0, 480, 480, 50, 960, 0 },
2891 { XFER_SW_DMA_1, 90, 0, 0, 0, 240, 240, 30, 480, 0 },
2892 { XFER_SW_DMA_2, 60, 0, 0, 0, 120, 120, 20, 240, 0 },
2894 { XFER_MW_DMA_0, 60, 0, 0, 0, 215, 215, 20, 480, 0 },
2895 { XFER_MW_DMA_1, 45, 0, 0, 0, 80, 50, 5, 150, 0 },
2896 { XFER_MW_DMA_2, 25, 0, 0, 0, 70, 25, 5, 120, 0 },
2897 { XFER_MW_DMA_3, 25, 0, 0, 0, 65, 25, 5, 100, 0 },
2898 { XFER_MW_DMA_4, 25, 0, 0, 0, 55, 20, 5, 80, 0 },
2900 /* { XFER_UDMA_SLOW, 0, 0, 0, 0, 0, 0, 0, 0, 150 }, */
2901 { XFER_UDMA_0, 0, 0, 0, 0, 0, 0, 0, 0, 120 },
2902 { XFER_UDMA_1, 0, 0, 0, 0, 0, 0, 0, 0, 80 },
2903 { XFER_UDMA_2, 0, 0, 0, 0, 0, 0, 0, 0, 60 },
2904 { XFER_UDMA_3, 0, 0, 0, 0, 0, 0, 0, 0, 45 },
2905 { XFER_UDMA_4, 0, 0, 0, 0, 0, 0, 0, 0, 30 },
2906 { XFER_UDMA_5, 0, 0, 0, 0, 0, 0, 0, 0, 20 },
2907 { XFER_UDMA_6, 0, 0, 0, 0, 0, 0, 0, 0, 15 },
2912 #define ENOUGH(v, unit) (((v)-1)/(unit)+1)
2913 #define EZ(v, unit) ((v)?ENOUGH(v, unit):0)
2915 static void ata_timing_quantize(const struct ata_timing *t, struct ata_timing *q, int T, int UT)
2917 q->setup = EZ(t->setup * 1000, T);
2918 q->act8b = EZ(t->act8b * 1000, T);
2919 q->rec8b = EZ(t->rec8b * 1000, T);
2920 q->cyc8b = EZ(t->cyc8b * 1000, T);
2921 q->active = EZ(t->active * 1000, T);
2922 q->recover = EZ(t->recover * 1000, T);
2923 q->dmack_hold = EZ(t->dmack_hold * 1000, T);
2924 q->cycle = EZ(t->cycle * 1000, T);
2925 q->udma = EZ(t->udma * 1000, UT);
2928 void ata_timing_merge(const struct ata_timing *a, const struct ata_timing *b,
2929 struct ata_timing *m, unsigned int what)
2931 if (what & ATA_TIMING_SETUP ) m->setup = max(a->setup, b->setup);
2932 if (what & ATA_TIMING_ACT8B ) m->act8b = max(a->act8b, b->act8b);
2933 if (what & ATA_TIMING_REC8B ) m->rec8b = max(a->rec8b, b->rec8b);
2934 if (what & ATA_TIMING_CYC8B ) m->cyc8b = max(a->cyc8b, b->cyc8b);
2935 if (what & ATA_TIMING_ACTIVE ) m->active = max(a->active, b->active);
2936 if (what & ATA_TIMING_RECOVER) m->recover = max(a->recover, b->recover);
2937 if (what & ATA_TIMING_DMACK_HOLD) m->dmack_hold = max(a->dmack_hold, b->dmack_hold);
2938 if (what & ATA_TIMING_CYCLE ) m->cycle = max(a->cycle, b->cycle);
2939 if (what & ATA_TIMING_UDMA ) m->udma = max(a->udma, b->udma);
2942 const struct ata_timing *ata_timing_find_mode(u8 xfer_mode)
2944 const struct ata_timing *t = ata_timing;
2946 while (xfer_mode > t->mode)
2949 if (xfer_mode == t->mode)
2952 WARN_ONCE(true, "%s: unable to find timing for xfer_mode 0x%x\n",
2953 __func__, xfer_mode);
2958 int ata_timing_compute(struct ata_device *adev, unsigned short speed,
2959 struct ata_timing *t, int T, int UT)
2961 const u16 *id = adev->id;
2962 const struct ata_timing *s;
2963 struct ata_timing p;
2969 if (!(s = ata_timing_find_mode(speed)))
2972 memcpy(t, s, sizeof(*s));
2975 * If the drive is an EIDE drive, it can tell us it needs extended
2976 * PIO/MW_DMA cycle timing.
2979 if (id[ATA_ID_FIELD_VALID] & 2) { /* EIDE drive */
2980 memset(&p, 0, sizeof(p));
2982 if (speed >= XFER_PIO_0 && speed < XFER_SW_DMA_0) {
2983 if (speed <= XFER_PIO_2)
2984 p.cycle = p.cyc8b = id[ATA_ID_EIDE_PIO];
2985 else if ((speed <= XFER_PIO_4) ||
2986 (speed == XFER_PIO_5 && !ata_id_is_cfa(id)))
2987 p.cycle = p.cyc8b = id[ATA_ID_EIDE_PIO_IORDY];
2988 } else if (speed >= XFER_MW_DMA_0 && speed <= XFER_MW_DMA_2)
2989 p.cycle = id[ATA_ID_EIDE_DMA_MIN];
2991 ata_timing_merge(&p, t, t, ATA_TIMING_CYCLE | ATA_TIMING_CYC8B);
2995 * Convert the timing to bus clock counts.
2998 ata_timing_quantize(t, t, T, UT);
3001 * Even in DMA/UDMA modes we still use PIO access for IDENTIFY,
3002 * S.M.A.R.T * and some other commands. We have to ensure that the
3003 * DMA cycle timing is slower/equal than the fastest PIO timing.
3006 if (speed > XFER_PIO_6) {
3007 ata_timing_compute(adev, adev->pio_mode, &p, T, UT);
3008 ata_timing_merge(&p, t, t, ATA_TIMING_ALL);
3012 * Lengthen active & recovery time so that cycle time is correct.
3015 if (t->act8b + t->rec8b < t->cyc8b) {
3016 t->act8b += (t->cyc8b - (t->act8b + t->rec8b)) / 2;
3017 t->rec8b = t->cyc8b - t->act8b;
3020 if (t->active + t->recover < t->cycle) {
3021 t->active += (t->cycle - (t->active + t->recover)) / 2;
3022 t->recover = t->cycle - t->active;
3025 /* In a few cases quantisation may produce enough errors to
3026 leave t->cycle too low for the sum of active and recovery
3027 if so we must correct this */
3028 if (t->active + t->recover > t->cycle)
3029 t->cycle = t->active + t->recover;
3035 * ata_timing_cycle2mode - find xfer mode for the specified cycle duration
3036 * @xfer_shift: ATA_SHIFT_* value for transfer type to examine.
3037 * @cycle: cycle duration in ns
3039 * Return matching xfer mode for @cycle. The returned mode is of
3040 * the transfer type specified by @xfer_shift. If @cycle is too
3041 * slow for @xfer_shift, 0xff is returned. If @cycle is faster
3042 * than the fastest known mode, the fasted mode is returned.
3048 * Matching xfer_mode, 0xff if no match found.
3050 u8 ata_timing_cycle2mode(unsigned int xfer_shift, int cycle)
3052 u8 base_mode = 0xff, last_mode = 0xff;
3053 const struct ata_xfer_ent *ent;
3054 const struct ata_timing *t;
3056 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
3057 if (ent->shift == xfer_shift)
3058 base_mode = ent->base;
3060 for (t = ata_timing_find_mode(base_mode);
3061 t && ata_xfer_mode2shift(t->mode) == xfer_shift; t++) {
3062 unsigned short this_cycle;
3064 switch (xfer_shift) {
3066 case ATA_SHIFT_MWDMA:
3067 this_cycle = t->cycle;
3069 case ATA_SHIFT_UDMA:
3070 this_cycle = t->udma;
3076 if (cycle > this_cycle)
3079 last_mode = t->mode;
3086 * ata_down_xfermask_limit - adjust dev xfer masks downward
3087 * @dev: Device to adjust xfer masks
3088 * @sel: ATA_DNXFER_* selector
3090 * Adjust xfer masks of @dev downward. Note that this function
3091 * does not apply the change. Invoking ata_set_mode() afterwards
3092 * will apply the limit.
3095 * Inherited from caller.
3098 * 0 on success, negative errno on failure
3100 int ata_down_xfermask_limit(struct ata_device *dev, unsigned int sel)
3103 unsigned long orig_mask, xfer_mask;
3104 unsigned long pio_mask, mwdma_mask, udma_mask;
3107 quiet = !!(sel & ATA_DNXFER_QUIET);
3108 sel &= ~ATA_DNXFER_QUIET;
3110 xfer_mask = orig_mask = ata_pack_xfermask(dev->pio_mask,
3113 ata_unpack_xfermask(xfer_mask, &pio_mask, &mwdma_mask, &udma_mask);
3116 case ATA_DNXFER_PIO:
3117 highbit = fls(pio_mask) - 1;
3118 pio_mask &= ~(1 << highbit);
3121 case ATA_DNXFER_DMA:
3123 highbit = fls(udma_mask) - 1;
3124 udma_mask &= ~(1 << highbit);
3127 } else if (mwdma_mask) {
3128 highbit = fls(mwdma_mask) - 1;
3129 mwdma_mask &= ~(1 << highbit);
3135 case ATA_DNXFER_40C:
3136 udma_mask &= ATA_UDMA_MASK_40C;
3139 case ATA_DNXFER_FORCE_PIO0:
3141 case ATA_DNXFER_FORCE_PIO:
3150 xfer_mask &= ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask);
3152 if (!(xfer_mask & ATA_MASK_PIO) || xfer_mask == orig_mask)
3156 if (xfer_mask & (ATA_MASK_MWDMA | ATA_MASK_UDMA))
3157 snprintf(buf, sizeof(buf), "%s:%s",
3158 ata_mode_string(xfer_mask),
3159 ata_mode_string(xfer_mask & ATA_MASK_PIO));
3161 snprintf(buf, sizeof(buf), "%s",
3162 ata_mode_string(xfer_mask));
3164 ata_dev_warn(dev, "limiting speed to %s\n", buf);
3167 ata_unpack_xfermask(xfer_mask, &dev->pio_mask, &dev->mwdma_mask,
3173 static int ata_dev_set_mode(struct ata_device *dev)
3175 struct ata_port *ap = dev->link->ap;
3176 struct ata_eh_context *ehc = &dev->link->eh_context;
3177 const bool nosetxfer = dev->horkage & ATA_HORKAGE_NOSETXFER;
3178 const char *dev_err_whine = "";
3179 int ign_dev_err = 0;
3180 unsigned int err_mask = 0;
3183 dev->flags &= ~ATA_DFLAG_PIO;
3184 if (dev->xfer_shift == ATA_SHIFT_PIO)
3185 dev->flags |= ATA_DFLAG_PIO;
3187 if (nosetxfer && ap->flags & ATA_FLAG_SATA && ata_id_is_sata(dev->id))
3188 dev_err_whine = " (SET_XFERMODE skipped)";
3192 "NOSETXFER but PATA detected - can't "
3193 "skip SETXFER, might malfunction\n");
3194 err_mask = ata_dev_set_xfermode(dev);
3197 if (err_mask & ~AC_ERR_DEV)
3201 ehc->i.flags |= ATA_EHI_POST_SETMODE;
3202 rc = ata_dev_revalidate(dev, ATA_DEV_UNKNOWN, 0);
3203 ehc->i.flags &= ~ATA_EHI_POST_SETMODE;
3207 if (dev->xfer_shift == ATA_SHIFT_PIO) {
3208 /* Old CFA may refuse this command, which is just fine */
3209 if (ata_id_is_cfa(dev->id))
3211 /* Catch several broken garbage emulations plus some pre
3213 if (ata_id_major_version(dev->id) == 0 &&
3214 dev->pio_mode <= XFER_PIO_2)
3216 /* Some very old devices and some bad newer ones fail
3217 any kind of SET_XFERMODE request but support PIO0-2
3218 timings and no IORDY */
3219 if (!ata_id_has_iordy(dev->id) && dev->pio_mode <= XFER_PIO_2)
3222 /* Early MWDMA devices do DMA but don't allow DMA mode setting.
3223 Don't fail an MWDMA0 set IFF the device indicates it is in MWDMA0 */
3224 if (dev->xfer_shift == ATA_SHIFT_MWDMA &&
3225 dev->dma_mode == XFER_MW_DMA_0 &&
3226 (dev->id[63] >> 8) & 1)
3229 /* if the device is actually configured correctly, ignore dev err */
3230 if (dev->xfer_mode == ata_xfer_mask2mode(ata_id_xfermask(dev->id)))
3233 if (err_mask & AC_ERR_DEV) {
3237 dev_err_whine = " (device error ignored)";
3240 DPRINTK("xfer_shift=%u, xfer_mode=0x%x\n",
3241 dev->xfer_shift, (int)dev->xfer_mode);
3243 ata_dev_info(dev, "configured for %s%s\n",
3244 ata_mode_string(ata_xfer_mode2mask(dev->xfer_mode)),
3250 ata_dev_err(dev, "failed to set xfermode (err_mask=0x%x)\n", err_mask);
3255 * ata_do_set_mode - Program timings and issue SET FEATURES - XFER
3256 * @link: link on which timings will be programmed
3257 * @r_failed_dev: out parameter for failed device
3259 * Standard implementation of the function used to tune and set
3260 * ATA device disk transfer mode (PIO3, UDMA6, etc.). If
3261 * ata_dev_set_mode() fails, pointer to the failing device is
3262 * returned in @r_failed_dev.
3265 * PCI/etc. bus probe sem.
3268 * 0 on success, negative errno otherwise
3271 int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev)
3273 struct ata_port *ap = link->ap;
3274 struct ata_device *dev;
3275 int rc = 0, used_dma = 0, found = 0;
3277 /* step 1: calculate xfer_mask */
3278 ata_for_each_dev(dev, link, ENABLED) {
3279 unsigned long pio_mask, dma_mask;
3280 unsigned int mode_mask;
3282 mode_mask = ATA_DMA_MASK_ATA;
3283 if (dev->class == ATA_DEV_ATAPI)
3284 mode_mask = ATA_DMA_MASK_ATAPI;
3285 else if (ata_id_is_cfa(dev->id))
3286 mode_mask = ATA_DMA_MASK_CFA;
3288 ata_dev_xfermask(dev);
3289 ata_force_xfermask(dev);
3291 pio_mask = ata_pack_xfermask(dev->pio_mask, 0, 0);
3293 if (libata_dma_mask & mode_mask)
3294 dma_mask = ata_pack_xfermask(0, dev->mwdma_mask,
3299 dev->pio_mode = ata_xfer_mask2mode(pio_mask);
3300 dev->dma_mode = ata_xfer_mask2mode(dma_mask);
3303 if (ata_dma_enabled(dev))
3309 /* step 2: always set host PIO timings */
3310 ata_for_each_dev(dev, link, ENABLED) {
3311 if (dev->pio_mode == 0xff) {
3312 ata_dev_warn(dev, "no PIO support\n");
3317 dev->xfer_mode = dev->pio_mode;
3318 dev->xfer_shift = ATA_SHIFT_PIO;
3319 if (ap->ops->set_piomode)
3320 ap->ops->set_piomode(ap, dev);
3323 /* step 3: set host DMA timings */
3324 ata_for_each_dev(dev, link, ENABLED) {
3325 if (!ata_dma_enabled(dev))
3328 dev->xfer_mode = dev->dma_mode;
3329 dev->xfer_shift = ata_xfer_mode2shift(dev->dma_mode);
3330 if (ap->ops->set_dmamode)
3331 ap->ops->set_dmamode(ap, dev);
3334 /* step 4: update devices' xfer mode */
3335 ata_for_each_dev(dev, link, ENABLED) {
3336 rc = ata_dev_set_mode(dev);
3341 /* Record simplex status. If we selected DMA then the other
3342 * host channels are not permitted to do so.
3344 if (used_dma && (ap->host->flags & ATA_HOST_SIMPLEX))
3345 ap->host->simplex_claimed = ap;
3349 *r_failed_dev = dev;
3354 * ata_wait_ready - wait for link to become ready
3355 * @link: link to be waited on
3356 * @deadline: deadline jiffies for the operation
3357 * @check_ready: callback to check link readiness
3359 * Wait for @link to become ready. @check_ready should return
3360 * positive number if @link is ready, 0 if it isn't, -ENODEV if
3361 * link doesn't seem to be occupied, other errno for other error
3364 * Transient -ENODEV conditions are allowed for
3365 * ATA_TMOUT_FF_WAIT.
3371 * 0 if @linke is ready before @deadline; otherwise, -errno.
3373 int ata_wait_ready(struct ata_link *link, unsigned long deadline,
3374 int (*check_ready)(struct ata_link *link))
3376 unsigned long start = jiffies;
3377 unsigned long nodev_deadline;
3380 /* choose which 0xff timeout to use, read comment in libata.h */
3381 if (link->ap->host->flags & ATA_HOST_PARALLEL_SCAN)
3382 nodev_deadline = ata_deadline(start, ATA_TMOUT_FF_WAIT_LONG);
3384 nodev_deadline = ata_deadline(start, ATA_TMOUT_FF_WAIT);
3386 /* Slave readiness can't be tested separately from master. On
3387 * M/S emulation configuration, this function should be called
3388 * only on the master and it will handle both master and slave.
3390 WARN_ON(link == link->ap->slave_link);
3392 if (time_after(nodev_deadline, deadline))
3393 nodev_deadline = deadline;
3396 unsigned long now = jiffies;
3399 ready = tmp = check_ready(link);
3404 * -ENODEV could be transient. Ignore -ENODEV if link
3405 * is online. Also, some SATA devices take a long
3406 * time to clear 0xff after reset. Wait for
3407 * ATA_TMOUT_FF_WAIT[_LONG] on -ENODEV if link isn't
3410 * Note that some PATA controllers (pata_ali) explode
3411 * if status register is read more than once when
3412 * there's no device attached.
3414 if (ready == -ENODEV) {
3415 if (ata_link_online(link))
3417 else if ((link->ap->flags & ATA_FLAG_SATA) &&
3418 !ata_link_offline(link) &&
3419 time_before(now, nodev_deadline))
3425 if (time_after(now, deadline))
3428 if (!warned && time_after(now, start + 5 * HZ) &&
3429 (deadline - now > 3 * HZ)) {
3431 "link is slow to respond, please be patient "
3432 "(ready=%d)\n", tmp);
3436 ata_msleep(link->ap, 50);
3441 * ata_wait_after_reset - wait for link to become ready after reset
3442 * @link: link to be waited on
3443 * @deadline: deadline jiffies for the operation
3444 * @check_ready: callback to check link readiness
3446 * Wait for @link to become ready after reset.
3452 * 0 if @linke is ready before @deadline; otherwise, -errno.
3454 int ata_wait_after_reset(struct ata_link *link, unsigned long deadline,
3455 int (*check_ready)(struct ata_link *link))
3457 ata_msleep(link->ap, ATA_WAIT_AFTER_RESET);
3459 return ata_wait_ready(link, deadline, check_ready);
3463 * sata_link_debounce - debounce SATA phy status
3464 * @link: ATA link to debounce SATA phy status for
3465 * @params: timing parameters { interval, duratinon, timeout } in msec
3466 * @deadline: deadline jiffies for the operation
3468 * Make sure SStatus of @link reaches stable state, determined by
3469 * holding the same value where DET is not 1 for @duration polled
3470 * every @interval, before @timeout. Timeout constraints the
3471 * beginning of the stable state. Because DET gets stuck at 1 on
3472 * some controllers after hot unplugging, this functions waits
3473 * until timeout then returns 0 if DET is stable at 1.
3475 * @timeout is further limited by @deadline. The sooner of the
3479 * Kernel thread context (may sleep)
3482 * 0 on success, -errno on failure.
3484 int sata_link_debounce(struct ata_link *link, const unsigned long *params,
3485 unsigned long deadline)
3487 unsigned long interval = params[0];
3488 unsigned long duration = params[1];
3489 unsigned long last_jiffies, t;
3493 t = ata_deadline(jiffies, params[2]);
3494 if (time_before(t, deadline))
3497 if ((rc = sata_scr_read(link, SCR_STATUS, &cur)))
3502 last_jiffies = jiffies;
3505 ata_msleep(link->ap, interval);
3506 if ((rc = sata_scr_read(link, SCR_STATUS, &cur)))
3512 if (cur == 1 && time_before(jiffies, deadline))
3514 if (time_after(jiffies,
3515 ata_deadline(last_jiffies, duration)))
3520 /* unstable, start over */
3522 last_jiffies = jiffies;
3524 /* Check deadline. If debouncing failed, return
3525 * -EPIPE to tell upper layer to lower link speed.
3527 if (time_after(jiffies, deadline))
3533 * sata_link_resume - resume SATA link
3534 * @link: ATA link to resume SATA
3535 * @params: timing parameters { interval, duratinon, timeout } in msec
3536 * @deadline: deadline jiffies for the operation
3538 * Resume SATA phy @link and debounce it.
3541 * Kernel thread context (may sleep)
3544 * 0 on success, -errno on failure.
3546 int sata_link_resume(struct ata_link *link, const unsigned long *params,
3547 unsigned long deadline)
3549 int tries = ATA_LINK_RESUME_TRIES;
3550 u32 scontrol, serror;
3553 if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
3557 * Writes to SControl sometimes get ignored under certain
3558 * controllers (ata_piix SIDPR). Make sure DET actually is
3562 scontrol = (scontrol & 0x0f0) | 0x300;
3563 if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol)))
3566 * Some PHYs react badly if SStatus is pounded
3567 * immediately after resuming. Delay 200ms before
3570 ata_msleep(link->ap, 200);
3572 /* is SControl restored correctly? */
3573 if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
3575 } while ((scontrol & 0xf0f) != 0x300 && --tries);
3577 if ((scontrol & 0xf0f) != 0x300) {
3578 ata_link_warn(link, "failed to resume link (SControl %X)\n",
3583 if (tries < ATA_LINK_RESUME_TRIES)
3584 ata_link_warn(link, "link resume succeeded after %d retries\n",
3585 ATA_LINK_RESUME_TRIES - tries);
3587 if ((rc = sata_link_debounce(link, params, deadline)))
3590 /* clear SError, some PHYs require this even for SRST to work */
3591 if (!(rc = sata_scr_read(link, SCR_ERROR, &serror)))
3592 rc = sata_scr_write(link, SCR_ERROR, serror);
3594 return rc != -EINVAL ? rc : 0;
3598 * sata_link_scr_lpm - manipulate SControl IPM and SPM fields
3599 * @link: ATA link to manipulate SControl for
3600 * @policy: LPM policy to configure
3601 * @spm_wakeup: initiate LPM transition to active state
3603 * Manipulate the IPM field of the SControl register of @link
3604 * according to @policy. If @policy is ATA_LPM_MAX_POWER and
3605 * @spm_wakeup is %true, the SPM field is manipulated to wake up
3606 * the link. This function also clears PHYRDY_CHG before
3613 * 0 on succes, -errno otherwise.
3615 int sata_link_scr_lpm(struct ata_link *link, enum ata_lpm_policy policy,
3618 struct ata_eh_context *ehc = &link->eh_context;
3619 bool woken_up = false;
3623 rc = sata_scr_read(link, SCR_CONTROL, &scontrol);
3628 case ATA_LPM_MAX_POWER:
3629 /* disable all LPM transitions */
3630 scontrol |= (0x7 << 8);
3631 /* initiate transition to active state */
3633 scontrol |= (0x4 << 12);
3637 case ATA_LPM_MED_POWER:
3638 /* allow LPM to PARTIAL */
3639 scontrol &= ~(0x1 << 8);
3640 scontrol |= (0x6 << 8);
3642 case ATA_LPM_MIN_POWER:
3643 if (ata_link_nr_enabled(link) > 0)
3644 /* no restrictions on LPM transitions */
3645 scontrol &= ~(0x7 << 8);
3647 /* empty port, power off */
3649 scontrol |= (0x1 << 2);
3656 rc = sata_scr_write(link, SCR_CONTROL, scontrol);
3660 /* give the link time to transit out of LPM state */
3664 /* clear PHYRDY_CHG from SError */
3665 ehc->i.serror &= ~SERR_PHYRDY_CHG;
3666 return sata_scr_write(link, SCR_ERROR, SERR_PHYRDY_CHG);
3670 * ata_std_prereset - prepare for reset
3671 * @link: ATA link to be reset
3672 * @deadline: deadline jiffies for the operation
3674 * @link is about to be reset. Initialize it. Failure from
3675 * prereset makes libata abort whole reset sequence and give up
3676 * that port, so prereset should be best-effort. It does its
3677 * best to prepare for reset sequence but if things go wrong, it
3678 * should just whine, not fail.
3681 * Kernel thread context (may sleep)
3684 * 0 on success, -errno otherwise.
3686 int ata_std_prereset(struct ata_link *link, unsigned long deadline)
3688 struct ata_port *ap = link->ap;
3689 struct ata_eh_context *ehc = &link->eh_context;
3690 const unsigned long *timing = sata_ehc_deb_timing(ehc);
3693 /* if we're about to do hardreset, nothing more to do */
3694 if (ehc->i.action & ATA_EH_HARDRESET)
3697 /* if SATA, resume link */
3698 if (ap->flags & ATA_FLAG_SATA) {
3699 rc = sata_link_resume(link, timing, deadline);
3700 /* whine about phy resume failure but proceed */
3701 if (rc && rc != -EOPNOTSUPP)
3703 "failed to resume link for reset (errno=%d)\n",
3707 /* no point in trying softreset on offline link */
3708 if (ata_phys_link_offline(link))
3709 ehc->i.action &= ~ATA_EH_SOFTRESET;
3715 * sata_link_hardreset - reset link via SATA phy reset
3716 * @link: link to reset
3717 * @timing: timing parameters { interval, duratinon, timeout } in msec
3718 * @deadline: deadline jiffies for the operation
3719 * @online: optional out parameter indicating link onlineness
3720 * @check_ready: optional callback to check link readiness
3722 * SATA phy-reset @link using DET bits of SControl register.
3723 * After hardreset, link readiness is waited upon using
3724 * ata_wait_ready() if @check_ready is specified. LLDs are
3725 * allowed to not specify @check_ready and wait itself after this
3726 * function returns. Device classification is LLD's
3729 * *@online is set to one iff reset succeeded and @link is online
3733 * Kernel thread context (may sleep)
3736 * 0 on success, -errno otherwise.
3738 int sata_link_hardreset(struct ata_link *link, const unsigned long *timing,
3739 unsigned long deadline,
3740 bool *online, int (*check_ready)(struct ata_link *))
3750 if (sata_set_spd_needed(link)) {
3751 /* SATA spec says nothing about how to reconfigure
3752 * spd. To be on the safe side, turn off phy during
3753 * reconfiguration. This works for at least ICH7 AHCI
3756 if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
3759 scontrol = (scontrol & 0x0f0) | 0x304;
3761 if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol)))
3767 /* issue phy wake/reset */
3768 if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
3771 scontrol = (scontrol & 0x0f0) | 0x301;
3773 if ((rc = sata_scr_write_flush(link, SCR_CONTROL, scontrol)))
3776 /* Couldn't find anything in SATA I/II specs, but AHCI-1.1
3777 * 10.4.2 says at least 1 ms.
3779 ata_msleep(link->ap, 1);
3781 /* bring link back */
3782 rc = sata_link_resume(link, timing, deadline);
3785 /* if link is offline nothing more to do */
3786 if (ata_phys_link_offline(link))
3789 /* Link is online. From this point, -ENODEV too is an error. */
3793 if (sata_pmp_supported(link->ap) && ata_is_host_link(link)) {
3794 /* If PMP is supported, we have to do follow-up SRST.
3795 * Some PMPs don't send D2H Reg FIS after hardreset if
3796 * the first port is empty. Wait only for
3797 * ATA_TMOUT_PMP_SRST_WAIT.
3800 unsigned long pmp_deadline;
3802 pmp_deadline = ata_deadline(jiffies,
3803 ATA_TMOUT_PMP_SRST_WAIT);
3804 if (time_after(pmp_deadline, deadline))
3805 pmp_deadline = deadline;
3806 ata_wait_ready(link, pmp_deadline, check_ready);
3814 rc = ata_wait_ready(link, deadline, check_ready);
3816 if (rc && rc != -EAGAIN) {
3817 /* online is set iff link is online && reset succeeded */
3820 ata_link_err(link, "COMRESET failed (errno=%d)\n", rc);
3822 DPRINTK("EXIT, rc=%d\n", rc);
3827 * sata_std_hardreset - COMRESET w/o waiting or classification
3828 * @link: link to reset
3829 * @class: resulting class of attached device
3830 * @deadline: deadline jiffies for the operation
3832 * Standard SATA COMRESET w/o waiting or classification.
3835 * Kernel thread context (may sleep)
3838 * 0 if link offline, -EAGAIN if link online, -errno on errors.
3840 int sata_std_hardreset(struct ata_link *link, unsigned int *class,
3841 unsigned long deadline)
3843 const unsigned long *timing = sata_ehc_deb_timing(&link->eh_context);
3848 rc = sata_link_hardreset(link, timing, deadline, &online, NULL);
3849 return online ? -EAGAIN : rc;
3853 * ata_std_postreset - standard postreset callback
3854 * @link: the target ata_link
3855 * @classes: classes of attached devices
3857 * This function is invoked after a successful reset. Note that
3858 * the device might have been reset more than once using
3859 * different reset methods before postreset is invoked.
3862 * Kernel thread context (may sleep)
3864 void ata_std_postreset(struct ata_link *link, unsigned int *classes)
3870 /* reset complete, clear SError */
3871 if (!sata_scr_read(link, SCR_ERROR, &serror))
3872 sata_scr_write(link, SCR_ERROR, serror);
3874 /* print link status */
3875 sata_print_link_status(link);
3881 * ata_dev_same_device - Determine whether new ID matches configured device
3882 * @dev: device to compare against
3883 * @new_class: class of the new device
3884 * @new_id: IDENTIFY page of the new device
3886 * Compare @new_class and @new_id against @dev and determine
3887 * whether @dev is the device indicated by @new_class and
3894 * 1 if @dev matches @new_class and @new_id, 0 otherwise.
3896 static int ata_dev_same_device(struct ata_device *dev, unsigned int new_class,
3899 const u16 *old_id = dev->id;
3900 unsigned char model[2][ATA_ID_PROD_LEN + 1];
3901 unsigned char serial[2][ATA_ID_SERNO_LEN + 1];
3903 if (dev->class != new_class) {
3904 ata_dev_info(dev, "class mismatch %d != %d\n",
3905 dev->class, new_class);
3909 ata_id_c_string(old_id, model[0], ATA_ID_PROD, sizeof(model[0]));
3910 ata_id_c_string(new_id, model[1], ATA_ID_PROD, sizeof(model[1]));
3911 ata_id_c_string(old_id, serial[0], ATA_ID_SERNO, sizeof(serial[0]));
3912 ata_id_c_string(new_id, serial[1], ATA_ID_SERNO, sizeof(serial[1]));
3914 if (strcmp(model[0], model[1])) {
3915 ata_dev_info(dev, "model number mismatch '%s' != '%s'\n",
3916 model[0], model[1]);
3920 if (strcmp(serial[0], serial[1])) {
3921 ata_dev_info(dev, "serial number mismatch '%s' != '%s'\n",
3922 serial[0], serial[1]);
3930 * ata_dev_reread_id - Re-read IDENTIFY data
3931 * @dev: target ATA device
3932 * @readid_flags: read ID flags
3934 * Re-read IDENTIFY page and make sure @dev is still attached to
3938 * Kernel thread context (may sleep)
3941 * 0 on success, negative errno otherwise
3943 int ata_dev_reread_id(struct ata_device *dev, unsigned int readid_flags)
3945 unsigned int class = dev->class;
3946 u16 *id = (void *)dev->link->ap->sector_buf;
3950 rc = ata_dev_read_id(dev, &class, readid_flags, id);
3954 /* is the device still there? */
3955 if (!ata_dev_same_device(dev, class, id))
3958 memcpy(dev->id, id, sizeof(id[0]) * ATA_ID_WORDS);
3963 * ata_dev_revalidate - Revalidate ATA device
3964 * @dev: device to revalidate
3965 * @new_class: new class code
3966 * @readid_flags: read ID flags
3968 * Re-read IDENTIFY page, make sure @dev is still attached to the
3969 * port and reconfigure it according to the new IDENTIFY page.
3972 * Kernel thread context (may sleep)
3975 * 0 on success, negative errno otherwise
3977 int ata_dev_revalidate(struct ata_device *dev, unsigned int new_class,
3978 unsigned int readid_flags)
3980 u64 n_sectors = dev->n_sectors;
3981 u64 n_native_sectors = dev->n_native_sectors;
3984 if (!ata_dev_enabled(dev))
3987 /* fail early if !ATA && !ATAPI to avoid issuing [P]IDENTIFY to PMP */
3988 if (ata_class_enabled(new_class) &&
3989 new_class != ATA_DEV_ATA &&
3990 new_class != ATA_DEV_ATAPI &&
3991 new_class != ATA_DEV_SEMB) {
3992 ata_dev_info(dev, "class mismatch %u != %u\n",
3993 dev->class, new_class);
3999 rc = ata_dev_reread_id(dev, readid_flags);
4003 /* configure device according to the new ID */
4004 rc = ata_dev_configure(dev);
4008 /* verify n_sectors hasn't changed */
4009 if (dev->class != ATA_DEV_ATA || !n_sectors ||
4010 dev->n_sectors == n_sectors)
4013 /* n_sectors has changed */
4014 ata_dev_warn(dev, "n_sectors mismatch %llu != %llu\n",
4015 (unsigned long long)n_sectors,
4016 (unsigned long long)dev->n_sectors);
4019 * Something could have caused HPA to be unlocked
4020 * involuntarily. If n_native_sectors hasn't changed and the
4021 * new size matches it, keep the device.
4023 if (dev->n_native_sectors == n_native_sectors &&
4024 dev->n_sectors > n_sectors && dev->n_sectors == n_native_sectors) {
4026 "new n_sectors matches native, probably "
4027 "late HPA unlock, n_sectors updated\n");
4028 /* use the larger n_sectors */
4033 * Some BIOSes boot w/o HPA but resume w/ HPA locked. Try
4034 * unlocking HPA in those cases.
4036 * https://bugzilla.kernel.org/show_bug.cgi?id=15396
4038 if (dev->n_native_sectors == n_native_sectors &&
4039 dev->n_sectors < n_sectors && n_sectors == n_native_sectors &&
4040 !(dev->horkage & ATA_HORKAGE_BROKEN_HPA)) {
4042 "old n_sectors matches native, probably "
4043 "late HPA lock, will try to unlock HPA\n");
4044 /* try unlocking HPA */
4045 dev->flags |= ATA_DFLAG_UNLOCK_HPA;
4050 /* restore original n_[native_]sectors and fail */
4051 dev->n_native_sectors = n_native_sectors;
4052 dev->n_sectors = n_sectors;
4054 ata_dev_err(dev, "revalidation failed (errno=%d)\n", rc);
4058 struct ata_blacklist_entry {
4059 const char *model_num;
4060 const char *model_rev;
4061 unsigned long horkage;
4064 static const struct ata_blacklist_entry ata_device_blacklist [] = {
4065 /* Devices with DMA related problems under Linux */
4066 { "WDC AC11000H", NULL, ATA_HORKAGE_NODMA },
4067 { "WDC AC22100H", NULL, ATA_HORKAGE_NODMA },
4068 { "WDC AC32500H", NULL, ATA_HORKAGE_NODMA },
4069 { "WDC AC33100H", NULL, ATA_HORKAGE_NODMA },
4070 { "WDC AC31600H", NULL, ATA_HORKAGE_NODMA },
4071 { "WDC AC32100H", "24.09P07", ATA_HORKAGE_NODMA },
4072 { "WDC AC23200L", "21.10N21", ATA_HORKAGE_NODMA },
4073 { "Compaq CRD-8241B", NULL, ATA_HORKAGE_NODMA },
4074 { "CRD-8400B", NULL, ATA_HORKAGE_NODMA },
4075 { "CRD-848[02]B", NULL, ATA_HORKAGE_NODMA },
4076 { "CRD-84", NULL, ATA_HORKAGE_NODMA },
4077 { "SanDisk SDP3B", NULL, ATA_HORKAGE_NODMA },
4078 { "SanDisk SDP3B-64", NULL, ATA_HORKAGE_NODMA },
4079 { "SANYO CD-ROM CRD", NULL, ATA_HORKAGE_NODMA },
4080 { "HITACHI CDR-8", NULL, ATA_HORKAGE_NODMA },
4081 { "HITACHI CDR-8[34]35",NULL, ATA_HORKAGE_NODMA },
4082 { "Toshiba CD-ROM XM-6202B", NULL, ATA_HORKAGE_NODMA },
4083 { "TOSHIBA CD-ROM XM-1702BC", NULL, ATA_HORKAGE_NODMA },
4084 { "CD-532E-A", NULL, ATA_HORKAGE_NODMA },
4085 { "E-IDE CD-ROM CR-840",NULL, ATA_HORKAGE_NODMA },
4086 { "CD-ROM Drive/F5A", NULL, ATA_HORKAGE_NODMA },
4087 { "WPI CDD-820", NULL, ATA_HORKAGE_NODMA },
4088 { "SAMSUNG CD-ROM SC-148C", NULL, ATA_HORKAGE_NODMA },
4089 { "SAMSUNG CD-ROM SC", NULL, ATA_HORKAGE_NODMA },
4090 { "ATAPI CD-ROM DRIVE 40X MAXIMUM",NULL,ATA_HORKAGE_NODMA },
4091 { "_NEC DV5800A", NULL, ATA_HORKAGE_NODMA },
4092 { "SAMSUNG CD-ROM SN-124", "N001", ATA_HORKAGE_NODMA },
4093 { "Seagate STT20000A", NULL, ATA_HORKAGE_NODMA },
4094 { " 2GB ATA Flash Disk", "ADMA428M", ATA_HORKAGE_NODMA },
4095 /* Odd clown on sil3726/4726 PMPs */
4096 { "Config Disk", NULL, ATA_HORKAGE_DISABLE },
4098 /* Weird ATAPI devices */
4099 { "TORiSAN DVD-ROM DRD-N216", NULL, ATA_HORKAGE_MAX_SEC_128 },
4100 { "QUANTUM DAT DAT72-000", NULL, ATA_HORKAGE_ATAPI_MOD16_DMA },
4102 /* Devices we expect to fail diagnostics */
4104 /* Devices where NCQ should be avoided */
4106 { "WDC WD740ADFD-00", NULL, ATA_HORKAGE_NONCQ },
4107 { "WDC WD740ADFD-00NLR1", NULL, ATA_HORKAGE_NONCQ, },
4108 /* http://thread.gmane.org/gmane.linux.ide/14907 */
4109 { "FUJITSU MHT2060BH", NULL, ATA_HORKAGE_NONCQ },
4111 { "Maxtor *", "BANC*", ATA_HORKAGE_NONCQ },
4112 { "Maxtor 7V300F0", "VA111630", ATA_HORKAGE_NONCQ },
4113 { "ST380817AS", "3.42", ATA_HORKAGE_NONCQ },
4114 { "ST3160023AS", "3.42", ATA_HORKAGE_NONCQ },
4115 { "OCZ CORE_SSD", "02.10104", ATA_HORKAGE_NONCQ },
4117 /* Seagate NCQ + FLUSH CACHE firmware bug */
4118 { "ST31500341AS", "SD1[5-9]", ATA_HORKAGE_NONCQ |
4119 ATA_HORKAGE_FIRMWARE_WARN },
4121 { "ST31000333AS", "SD1[5-9]", ATA_HORKAGE_NONCQ |
4122 ATA_HORKAGE_FIRMWARE_WARN },
4124 { "ST3640[36]23AS", "SD1[5-9]", ATA_HORKAGE_NONCQ |
4125 ATA_HORKAGE_FIRMWARE_WARN },
4127 { "ST3320[68]13AS", "SD1[5-9]", ATA_HORKAGE_NONCQ |
4128 ATA_HORKAGE_FIRMWARE_WARN },
4130 /* Blacklist entries taken from Silicon Image 3124/3132
4131 Windows driver .inf file - also several Linux problem reports */
4132 { "HTS541060G9SA00", "MB3OC60D", ATA_HORKAGE_NONCQ, },
4133 { "HTS541080G9SA00", "MB4OC60D", ATA_HORKAGE_NONCQ, },
4134 { "HTS541010G9SA00", "MBZOC60D", ATA_HORKAGE_NONCQ, },
4136 /* https://bugzilla.kernel.org/show_bug.cgi?id=15573 */
4137 { "C300-CTFDDAC128MAG", "0001", ATA_HORKAGE_NONCQ, },
4139 /* devices which puke on READ_NATIVE_MAX */
4140 { "HDS724040KLSA80", "KFAOA20N", ATA_HORKAGE_BROKEN_HPA, },
4141 { "WDC WD3200JD-00KLB0", "WD-WCAMR1130137", ATA_HORKAGE_BROKEN_HPA },
4142 { "WDC WD2500JD-00HBB0", "WD-WMAL71490727", ATA_HORKAGE_BROKEN_HPA },
4143 { "MAXTOR 6L080L4", "A93.0500", ATA_HORKAGE_BROKEN_HPA },
4145 /* this one allows HPA unlocking but fails IOs on the area */
4146 { "OCZ-VERTEX", "1.30", ATA_HORKAGE_BROKEN_HPA },
4148 /* Devices which report 1 sector over size HPA */
4149 { "ST340823A", NULL, ATA_HORKAGE_HPA_SIZE, },
4150 { "ST320413A", NULL, ATA_HORKAGE_HPA_SIZE, },
4151 { "ST310211A", NULL, ATA_HORKAGE_HPA_SIZE, },
4153 /* Devices which get the IVB wrong */
4154 { "QUANTUM FIREBALLlct10 05", "A03.0900", ATA_HORKAGE_IVB, },
4155 /* Maybe we should just blacklist TSSTcorp... */
4156 { "TSSTcorp CDDVDW SH-S202[HJN]", "SB0[01]", ATA_HORKAGE_IVB, },
4158 /* Devices that do not need bridging limits applied */
4159 { "MTRON MSP-SATA*", NULL, ATA_HORKAGE_BRIDGE_OK, },
4160 { "BUFFALO HD-QSU2/R5", NULL, ATA_HORKAGE_BRIDGE_OK, },
4162 /* Devices which aren't very happy with higher link speeds */
4163 { "WD My Book", NULL, ATA_HORKAGE_1_5_GBPS, },
4164 { "Seagate FreeAgent GoFlex", NULL, ATA_HORKAGE_1_5_GBPS, },
4167 * Devices which choke on SETXFER. Applies only if both the
4168 * device and controller are SATA.
4170 { "PIONEER DVD-RW DVRTD08", NULL, ATA_HORKAGE_NOSETXFER },
4171 { "PIONEER DVD-RW DVRTD08A", NULL, ATA_HORKAGE_NOSETXFER },
4172 { "PIONEER DVD-RW DVR-215", NULL, ATA_HORKAGE_NOSETXFER },
4173 { "PIONEER DVD-RW DVR-212D", NULL, ATA_HORKAGE_NOSETXFER },
4174 { "PIONEER DVD-RW DVR-216D", NULL, ATA_HORKAGE_NOSETXFER },
4181 * glob_match - match a text string against a glob-style pattern
4182 * @text: the string to be examined
4183 * @pattern: the glob-style pattern to be matched against
4185 * Either/both of text and pattern can be empty strings.
4187 * Match text against a glob-style pattern, with wildcards and simple sets:
4189 * ? matches any single character.
4190 * * matches any run of characters.
4191 * [xyz] matches a single character from the set: x, y, or z.
4192 * [a-d] matches a single character from the range: a, b, c, or d.
4193 * [a-d0-9] matches a single character from either range.
4195 * The special characters ?, [, -, or *, can be matched using a set, eg. [*]
4196 * Behaviour with malformed patterns is undefined, though generally reasonable.
4198 * Sample patterns: "SD1?", "SD1[0-5]", "*R0", "SD*1?[012]*xx"
4200 * This function uses one level of recursion per '*' in pattern.
4201 * Since it calls _nothing_ else, and has _no_ explicit local variables,
4202 * this will not cause stack problems for any reasonable use here.
4205 * 0 on match, 1 otherwise.
4207 static int glob_match (const char *text, const char *pattern)
4210 /* Match single character or a '?' wildcard */
4211 if (*text == *pattern || *pattern == '?') {
4213 return 0; /* End of both strings: match */
4215 /* Match single char against a '[' bracketed ']' pattern set */
4216 if (!*text || *pattern != '[')
4217 break; /* Not a pattern set */
4218 while (*++pattern && *pattern != ']' && *text != *pattern) {
4219 if (*pattern == '-' && *(pattern - 1) != '[')
4220 if (*text > *(pattern - 1) && *text < *(pattern + 1)) {
4225 if (!*pattern || *pattern == ']')
4226 return 1; /* No match */
4227 while (*pattern && *pattern++ != ']');
4229 } while (*++text && *pattern);
4231 /* Match any run of chars against a '*' wildcard */
4232 if (*pattern == '*') {
4234 return 0; /* Match: avoid recursion at end of pattern */
4235 /* Loop to handle additional pattern chars after the wildcard */
4237 if (glob_match(text, pattern) == 0)
4238 return 0; /* Remainder matched */
4239 ++text; /* Absorb (match) this char and try again */
4242 if (!*text && !*pattern)
4243 return 0; /* End of both strings: match */
4244 return 1; /* No match */
4247 static unsigned long ata_dev_blacklisted(const struct ata_device *dev)
4249 unsigned char model_num[ATA_ID_PROD_LEN + 1];
4250 unsigned char model_rev[ATA_ID_FW_REV_LEN + 1];
4251 const struct ata_blacklist_entry *ad = ata_device_blacklist;
4253 ata_id_c_string(dev->id, model_num, ATA_ID_PROD, sizeof(model_num));
4254 ata_id_c_string(dev->id, model_rev, ATA_ID_FW_REV, sizeof(model_rev));
4256 while (ad->model_num) {
4257 if (!glob_match(model_num, ad->model_num)) {
4258 if (ad->model_rev == NULL)
4260 if (!glob_match(model_rev, ad->model_rev))
4268 static int ata_dma_blacklisted(const struct ata_device *dev)
4270 /* We don't support polling DMA.
4271 * DMA blacklist those ATAPI devices with CDB-intr (and use PIO)
4272 * if the LLDD handles only interrupts in the HSM_ST_LAST state.
4274 if ((dev->link->ap->flags & ATA_FLAG_PIO_POLLING) &&
4275 (dev->flags & ATA_DFLAG_CDB_INTR))
4277 return (dev->horkage & ATA_HORKAGE_NODMA) ? 1 : 0;
4281 * ata_is_40wire - check drive side detection
4284 * Perform drive side detection decoding, allowing for device vendors
4285 * who can't follow the documentation.
4288 static int ata_is_40wire(struct ata_device *dev)
4290 if (dev->horkage & ATA_HORKAGE_IVB)
4291 return ata_drive_40wire_relaxed(dev->id);
4292 return ata_drive_40wire(dev->id);
4296 * cable_is_40wire - 40/80/SATA decider
4297 * @ap: port to consider
4299 * This function encapsulates the policy for speed management
4300 * in one place. At the moment we don't cache the result but
4301 * there is a good case for setting ap->cbl to the result when
4302 * we are called with unknown cables (and figuring out if it
4303 * impacts hotplug at all).
4305 * Return 1 if the cable appears to be 40 wire.
4308 static int cable_is_40wire(struct ata_port *ap)
4310 struct ata_link *link;
4311 struct ata_device *dev;
4313 /* If the controller thinks we are 40 wire, we are. */
4314 if (ap->cbl == ATA_CBL_PATA40)
4317 /* If the controller thinks we are 80 wire, we are. */
4318 if (ap->cbl == ATA_CBL_PATA80 || ap->cbl == ATA_CBL_SATA)
4321 /* If the system is known to be 40 wire short cable (eg
4322 * laptop), then we allow 80 wire modes even if the drive
4325 if (ap->cbl == ATA_CBL_PATA40_SHORT)
4328 /* If the controller doesn't know, we scan.
4330 * Note: We look for all 40 wire detects at this point. Any
4331 * 80 wire detect is taken to be 80 wire cable because
4332 * - in many setups only the one drive (slave if present) will
4333 * give a valid detect
4334 * - if you have a non detect capable drive you don't want it
4335 * to colour the choice
4337 ata_for_each_link(link, ap, EDGE) {
4338 ata_for_each_dev(dev, link, ENABLED) {
4339 if (!ata_is_40wire(dev))
4347 * ata_dev_xfermask - Compute supported xfermask of the given device
4348 * @dev: Device to compute xfermask for
4350 * Compute supported xfermask of @dev and store it in
4351 * dev->*_mask. This function is responsible for applying all
4352 * known limits including host controller limits, device
4358 static void ata_dev_xfermask(struct ata_device *dev)
4360 struct ata_link *link = dev->link;
4361 struct ata_port *ap = link->ap;
4362 struct ata_host *host = ap->host;
4363 unsigned long xfer_mask;
4365 /* controller modes available */
4366 xfer_mask = ata_pack_xfermask(ap->pio_mask,
4367 ap->mwdma_mask, ap->udma_mask);
4369 /* drive modes available */
4370 xfer_mask &= ata_pack_xfermask(dev->pio_mask,
4371 dev->mwdma_mask, dev->udma_mask);
4372 xfer_mask &= ata_id_xfermask(dev->id);
4375 * CFA Advanced TrueIDE timings are not allowed on a shared
4378 if (ata_dev_pair(dev)) {
4379 /* No PIO5 or PIO6 */
4380 xfer_mask &= ~(0x03 << (ATA_SHIFT_PIO + 5));
4381 /* No MWDMA3 or MWDMA 4 */
4382 xfer_mask &= ~(0x03 << (ATA_SHIFT_MWDMA + 3));
4385 if (ata_dma_blacklisted(dev)) {
4386 xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA);
4388 "device is on DMA blacklist, disabling DMA\n");
4391 if ((host->flags & ATA_HOST_SIMPLEX) &&
4392 host->simplex_claimed && host->simplex_claimed != ap) {
4393 xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA);
4395 "simplex DMA is claimed by other device, disabling DMA\n");
4398 if (ap->flags & ATA_FLAG_NO_IORDY)
4399 xfer_mask &= ata_pio_mask_no_iordy(dev);
4401 if (ap->ops->mode_filter)
4402 xfer_mask = ap->ops->mode_filter(dev, xfer_mask);
4404 /* Apply cable rule here. Don't apply it early because when
4405 * we handle hot plug the cable type can itself change.
4406 * Check this last so that we know if the transfer rate was
4407 * solely limited by the cable.
4408 * Unknown or 80 wire cables reported host side are checked
4409 * drive side as well. Cases where we know a 40wire cable
4410 * is used safely for 80 are not checked here.
4412 if (xfer_mask & (0xF8 << ATA_SHIFT_UDMA))
4413 /* UDMA/44 or higher would be available */
4414 if (cable_is_40wire(ap)) {
4416 "limited to UDMA/33 due to 40-wire cable\n");
4417 xfer_mask &= ~(0xF8 << ATA_SHIFT_UDMA);
4420 ata_unpack_xfermask(xfer_mask, &dev->pio_mask,
4421 &dev->mwdma_mask, &dev->udma_mask);
4425 * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command
4426 * @dev: Device to which command will be sent
4428 * Issue SET FEATURES - XFER MODE command to device @dev
4432 * PCI/etc. bus probe sem.
4435 * 0 on success, AC_ERR_* mask otherwise.
4438 static unsigned int ata_dev_set_xfermode(struct ata_device *dev)
4440 struct ata_taskfile tf;
4441 unsigned int err_mask;
4443 /* set up set-features taskfile */
4444 DPRINTK("set features - xfer mode\n");
4446 /* Some controllers and ATAPI devices show flaky interrupt
4447 * behavior after setting xfer mode. Use polling instead.
4449 ata_tf_init(dev, &tf);
4450 tf.command = ATA_CMD_SET_FEATURES;
4451 tf.feature = SETFEATURES_XFER;
4452 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_POLLING;
4453 tf.protocol = ATA_PROT_NODATA;
4454 /* If we are using IORDY we must send the mode setting command */
4455 if (ata_pio_need_iordy(dev))
4456 tf.nsect = dev->xfer_mode;
4457 /* If the device has IORDY and the controller does not - turn it off */
4458 else if (ata_id_has_iordy(dev->id))
4460 else /* In the ancient relic department - skip all of this */
4463 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
4465 DPRINTK("EXIT, err_mask=%x\n", err_mask);
4470 * ata_dev_set_feature - Issue SET FEATURES - SATA FEATURES
4471 * @dev: Device to which command will be sent
4472 * @enable: Whether to enable or disable the feature
4473 * @feature: The sector count represents the feature to set
4475 * Issue SET FEATURES - SATA FEATURES command to device @dev
4476 * on port @ap with sector count
4479 * PCI/etc. bus probe sem.
4482 * 0 on success, AC_ERR_* mask otherwise.
4484 unsigned int ata_dev_set_feature(struct ata_device *dev, u8 enable, u8 feature)
4486 struct ata_taskfile tf;
4487 unsigned int err_mask;
4489 /* set up set-features taskfile */
4490 DPRINTK("set features - SATA features\n");
4492 ata_tf_init(dev, &tf);
4493 tf.command = ATA_CMD_SET_FEATURES;
4494 tf.feature = enable;
4495 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
4496 tf.protocol = ATA_PROT_NODATA;
4499 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
4501 DPRINTK("EXIT, err_mask=%x\n", err_mask);
4504 EXPORT_SYMBOL_GPL(ata_dev_set_feature);
4507 * ata_dev_init_params - Issue INIT DEV PARAMS command
4508 * @dev: Device to which command will be sent
4509 * @heads: Number of heads (taskfile parameter)
4510 * @sectors: Number of sectors (taskfile parameter)
4513 * Kernel thread context (may sleep)
4516 * 0 on success, AC_ERR_* mask otherwise.
4518 static unsigned int ata_dev_init_params(struct ata_device *dev,
4519 u16 heads, u16 sectors)
4521 struct ata_taskfile tf;
4522 unsigned int err_mask;
4524 /* Number of sectors per track 1-255. Number of heads 1-16 */
4525 if (sectors < 1 || sectors > 255 || heads < 1 || heads > 16)
4526 return AC_ERR_INVALID;
4528 /* set up init dev params taskfile */
4529 DPRINTK("init dev params \n");
4531 ata_tf_init(dev, &tf);
4532 tf.command = ATA_CMD_INIT_DEV_PARAMS;
4533 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
4534 tf.protocol = ATA_PROT_NODATA;
4536 tf.device |= (heads - 1) & 0x0f; /* max head = num. of heads - 1 */
4538 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
4539 /* A clean abort indicates an original or just out of spec drive
4540 and we should continue as we issue the setup based on the
4541 drive reported working geometry */
4542 if (err_mask == AC_ERR_DEV && (tf.feature & ATA_ABORTED))
4545 DPRINTK("EXIT, err_mask=%x\n", err_mask);
4550 * ata_sg_clean - Unmap DMA memory associated with command
4551 * @qc: Command containing DMA memory to be released
4553 * Unmap all mapped DMA memory associated with this command.
4556 * spin_lock_irqsave(host lock)
4558 void ata_sg_clean(struct ata_queued_cmd *qc)
4560 struct ata_port *ap = qc->ap;
4561 struct scatterlist *sg = qc->sg;
4562 int dir = qc->dma_dir;
4564 WARN_ON_ONCE(sg == NULL);
4566 VPRINTK("unmapping %u sg elements\n", qc->n_elem);
4569 dma_unmap_sg(ap->dev, sg, qc->orig_n_elem, dir);
4571 qc->flags &= ~ATA_QCFLAG_DMAMAP;
4576 * atapi_check_dma - Check whether ATAPI DMA can be supported
4577 * @qc: Metadata associated with taskfile to check
4579 * Allow low-level driver to filter ATA PACKET commands, returning
4580 * a status indicating whether or not it is OK to use DMA for the
4581 * supplied PACKET command.
4584 * spin_lock_irqsave(host lock)
4586 * RETURNS: 0 when ATAPI DMA can be used
4589 int atapi_check_dma(struct ata_queued_cmd *qc)
4591 struct ata_port *ap = qc->ap;
4593 /* Don't allow DMA if it isn't multiple of 16 bytes. Quite a
4594 * few ATAPI devices choke on such DMA requests.
4596 if (!(qc->dev->horkage & ATA_HORKAGE_ATAPI_MOD16_DMA) &&
4597 unlikely(qc->nbytes & 15))
4600 if (ap->ops->check_atapi_dma)
4601 return ap->ops->check_atapi_dma(qc);
4607 * ata_std_qc_defer - Check whether a qc needs to be deferred
4608 * @qc: ATA command in question
4610 * Non-NCQ commands cannot run with any other command, NCQ or
4611 * not. As upper layer only knows the queue depth, we are
4612 * responsible for maintaining exclusion. This function checks
4613 * whether a new command @qc can be issued.
4616 * spin_lock_irqsave(host lock)
4619 * ATA_DEFER_* if deferring is needed, 0 otherwise.
4621 int ata_std_qc_defer(struct ata_queued_cmd *qc)
4623 struct ata_link *link = qc->dev->link;
4625 if (qc->tf.protocol == ATA_PROT_NCQ) {
4626 if (!ata_tag_valid(link->active_tag))
4629 if (!ata_tag_valid(link->active_tag) && !link->sactive)
4633 return ATA_DEFER_LINK;
4636 void ata_noop_qc_prep(struct ata_queued_cmd *qc) { }
4639 * ata_sg_init - Associate command with scatter-gather table.
4640 * @qc: Command to be associated
4641 * @sg: Scatter-gather table.
4642 * @n_elem: Number of elements in s/g table.
4644 * Initialize the data-related elements of queued_cmd @qc
4645 * to point to a scatter-gather table @sg, containing @n_elem
4649 * spin_lock_irqsave(host lock)
4651 void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
4652 unsigned int n_elem)
4655 qc->n_elem = n_elem;
4660 * ata_sg_setup - DMA-map the scatter-gather table associated with a command.
4661 * @qc: Command with scatter-gather table to be mapped.
4663 * DMA-map the scatter-gather table associated with queued_cmd @qc.
4666 * spin_lock_irqsave(host lock)
4669 * Zero on success, negative on error.
4672 static int ata_sg_setup(struct ata_queued_cmd *qc)
4674 struct ata_port *ap = qc->ap;
4675 unsigned int n_elem;
4677 VPRINTK("ENTER, ata%u\n", ap->print_id);
4679 n_elem = dma_map_sg(ap->dev, qc->sg, qc->n_elem, qc->dma_dir);
4683 DPRINTK("%d sg elements mapped\n", n_elem);
4684 qc->orig_n_elem = qc->n_elem;
4685 qc->n_elem = n_elem;
4686 qc->flags |= ATA_QCFLAG_DMAMAP;
4692 * swap_buf_le16 - swap halves of 16-bit words in place
4693 * @buf: Buffer to swap
4694 * @buf_words: Number of 16-bit words in buffer.
4696 * Swap halves of 16-bit words if needed to convert from
4697 * little-endian byte order to native cpu byte order, or
4701 * Inherited from caller.
4703 void swap_buf_le16(u16 *buf, unsigned int buf_words)
4708 for (i = 0; i < buf_words; i++)
4709 buf[i] = le16_to_cpu(buf[i]);
4710 #endif /* __BIG_ENDIAN */
4714 * ata_qc_new - Request an available ATA command, for queueing
4721 static struct ata_queued_cmd *ata_qc_new(struct ata_port *ap)
4723 struct ata_queued_cmd *qc = NULL;
4726 /* no command while frozen */
4727 if (unlikely(ap->pflags & ATA_PFLAG_FROZEN))
4730 /* the last tag is reserved for internal command. */
4731 for (i = 0; i < ATA_MAX_QUEUE - 1; i++)
4732 if (!test_and_set_bit(i, &ap->qc_allocated)) {
4733 qc = __ata_qc_from_tag(ap, i);
4744 * ata_qc_new_init - Request an available ATA command, and initialize it
4745 * @dev: Device from whom we request an available command structure
4751 struct ata_queued_cmd *ata_qc_new_init(struct ata_device *dev)
4753 struct ata_port *ap = dev->link->ap;
4754 struct ata_queued_cmd *qc;
4756 qc = ata_qc_new(ap);
4769 * ata_qc_free - free unused ata_queued_cmd
4770 * @qc: Command to complete
4772 * Designed to free unused ata_queued_cmd object
4773 * in case something prevents using it.
4776 * spin_lock_irqsave(host lock)
4778 void ata_qc_free(struct ata_queued_cmd *qc)
4780 struct ata_port *ap;
4783 WARN_ON_ONCE(qc == NULL); /* ata_qc_from_tag _might_ return NULL */
4788 if (likely(ata_tag_valid(tag))) {
4789 qc->tag = ATA_TAG_POISON;
4790 clear_bit(tag, &ap->qc_allocated);
4794 void __ata_qc_complete(struct ata_queued_cmd *qc)
4796 struct ata_port *ap;
4797 struct ata_link *link;
4799 WARN_ON_ONCE(qc == NULL); /* ata_qc_from_tag _might_ return NULL */
4800 WARN_ON_ONCE(!(qc->flags & ATA_QCFLAG_ACTIVE));
4802 link = qc->dev->link;
4804 if (likely(qc->flags & ATA_QCFLAG_DMAMAP))
4807 /* command should be marked inactive atomically with qc completion */
4808 if (qc->tf.protocol == ATA_PROT_NCQ) {
4809 link->sactive &= ~(1 << qc->tag);
4811 ap->nr_active_links--;
4813 link->active_tag = ATA_TAG_POISON;
4814 ap->nr_active_links--;
4817 /* clear exclusive status */
4818 if (unlikely(qc->flags & ATA_QCFLAG_CLEAR_EXCL &&
4819 ap->excl_link == link))
4820 ap->excl_link = NULL;
4822 /* atapi: mark qc as inactive to prevent the interrupt handler
4823 * from completing the command twice later, before the error handler
4824 * is called. (when rc != 0 and atapi request sense is needed)
4826 qc->flags &= ~ATA_QCFLAG_ACTIVE;
4827 ap->qc_active &= ~(1 << qc->tag);
4829 /* call completion callback */
4830 qc->complete_fn(qc);
4833 static void fill_result_tf(struct ata_queued_cmd *qc)
4835 struct ata_port *ap = qc->ap;
4837 qc->result_tf.flags = qc->tf.flags;
4838 ap->ops->qc_fill_rtf(qc);
4841 static void ata_verify_xfer(struct ata_queued_cmd *qc)
4843 struct ata_device *dev = qc->dev;
4845 if (ata_is_nodata(qc->tf.protocol))
4848 if ((dev->mwdma_mask || dev->udma_mask) && ata_is_pio(qc->tf.protocol))
4851 dev->flags &= ~ATA_DFLAG_DUBIOUS_XFER;
4855 * ata_qc_complete - Complete an active ATA command
4856 * @qc: Command to complete
4858 * Indicate to the mid and upper layers that an ATA command has
4859 * completed, with either an ok or not-ok status.
4861 * Refrain from calling this function multiple times when
4862 * successfully completing multiple NCQ commands.
4863 * ata_qc_complete_multiple() should be used instead, which will
4864 * properly update IRQ expect state.
4867 * spin_lock_irqsave(host lock)
4869 void ata_qc_complete(struct ata_queued_cmd *qc)
4871 struct ata_port *ap = qc->ap;
4873 /* XXX: New EH and old EH use different mechanisms to
4874 * synchronize EH with regular execution path.
4876 * In new EH, a failed qc is marked with ATA_QCFLAG_FAILED.
4877 * Normal execution path is responsible for not accessing a
4878 * failed qc. libata core enforces the rule by returning NULL
4879 * from ata_qc_from_tag() for failed qcs.
4881 * Old EH depends on ata_qc_complete() nullifying completion
4882 * requests if ATA_QCFLAG_EH_SCHEDULED is set. Old EH does
4883 * not synchronize with interrupt handler. Only PIO task is
4886 if (ap->ops->error_handler) {
4887 struct ata_device *dev = qc->dev;
4888 struct ata_eh_info *ehi = &dev->link->eh_info;
4890 if (unlikely(qc->err_mask))
4891 qc->flags |= ATA_QCFLAG_FAILED;
4894 * Finish internal commands without any further processing
4895 * and always with the result TF filled.
4897 if (unlikely(ata_tag_internal(qc->tag))) {
4899 __ata_qc_complete(qc);
4904 * Non-internal qc has failed. Fill the result TF and
4907 if (unlikely(qc->flags & ATA_QCFLAG_FAILED)) {
4909 ata_qc_schedule_eh(qc);
4913 WARN_ON_ONCE(ap->pflags & ATA_PFLAG_FROZEN);
4915 /* read result TF if requested */
4916 if (qc->flags & ATA_QCFLAG_RESULT_TF)
4919 /* Some commands need post-processing after successful
4922 switch (qc->tf.command) {
4923 case ATA_CMD_SET_FEATURES:
4924 if (qc->tf.feature != SETFEATURES_WC_ON &&
4925 qc->tf.feature != SETFEATURES_WC_OFF)
4928 case ATA_CMD_INIT_DEV_PARAMS: /* CHS translation changed */
4929 case ATA_CMD_SET_MULTI: /* multi_count changed */
4930 /* revalidate device */
4931 ehi->dev_action[dev->devno] |= ATA_EH_REVALIDATE;
4932 ata_port_schedule_eh(ap);
4936 dev->flags |= ATA_DFLAG_SLEEPING;
4940 if (unlikely(dev->flags & ATA_DFLAG_DUBIOUS_XFER))
4941 ata_verify_xfer(qc);
4943 __ata_qc_complete(qc);
4945 if (qc->flags & ATA_QCFLAG_EH_SCHEDULED)
4948 /* read result TF if failed or requested */
4949 if (qc->err_mask || qc->flags & ATA_QCFLAG_RESULT_TF)
4952 __ata_qc_complete(qc);
4957 * ata_qc_complete_multiple - Complete multiple qcs successfully
4958 * @ap: port in question
4959 * @qc_active: new qc_active mask
4961 * Complete in-flight commands. This functions is meant to be
4962 * called from low-level driver's interrupt routine to complete
4963 * requests normally. ap->qc_active and @qc_active is compared
4964 * and commands are completed accordingly.
4966 * Always use this function when completing multiple NCQ commands
4967 * from IRQ handlers instead of calling ata_qc_complete()
4968 * multiple times to keep IRQ expect status properly in sync.
4971 * spin_lock_irqsave(host lock)
4974 * Number of completed commands on success, -errno otherwise.
4976 int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active)
4981 done_mask = ap->qc_active ^ qc_active;
4983 if (unlikely(done_mask & qc_active)) {
4984 ata_port_err(ap, "illegal qc_active transition (%08x->%08x)\n",
4985 ap->qc_active, qc_active);
4990 struct ata_queued_cmd *qc;
4991 unsigned int tag = __ffs(done_mask);
4993 qc = ata_qc_from_tag(ap, tag);
4995 ata_qc_complete(qc);
4998 done_mask &= ~(1 << tag);
5005 * ata_qc_issue - issue taskfile to device
5006 * @qc: command to issue to device
5008 * Prepare an ATA command to submission to device.
5009 * This includes mapping the data into a DMA-able
5010 * area, filling in the S/G table, and finally
5011 * writing the taskfile to hardware, starting the command.
5014 * spin_lock_irqsave(host lock)
5016 void ata_qc_issue(struct ata_queued_cmd *qc)
5018 struct ata_port *ap = qc->ap;
5019 struct ata_link *link = qc->dev->link;
5020 u8 prot = qc->tf.protocol;
5022 /* Make sure only one non-NCQ command is outstanding. The
5023 * check is skipped for old EH because it reuses active qc to
5024 * request ATAPI sense.
5026 WARN_ON_ONCE(ap->ops->error_handler && ata_tag_valid(link->active_tag));
5028 if (ata_is_ncq(prot)) {
5029 WARN_ON_ONCE(link->sactive & (1 << qc->tag));
5032 ap->nr_active_links++;
5033 link->sactive |= 1 << qc->tag;
5035 WARN_ON_ONCE(link->sactive);
5037 ap->nr_active_links++;
5038 link->active_tag = qc->tag;
5041 qc->flags |= ATA_QCFLAG_ACTIVE;
5042 ap->qc_active |= 1 << qc->tag;
5045 * We guarantee to LLDs that they will have at least one
5046 * non-zero sg if the command is a data command.
5048 if (WARN_ON_ONCE(ata_is_data(prot) &&
5049 (!qc->sg || !qc->n_elem || !qc->nbytes)))
5052 if (ata_is_dma(prot) || (ata_is_pio(prot) &&
5053 (ap->flags & ATA_FLAG_PIO_DMA)))
5054 if (ata_sg_setup(qc))
5057 /* if device is sleeping, schedule reset and abort the link */
5058 if (unlikely(qc->dev->flags & ATA_DFLAG_SLEEPING)) {
5059 link->eh_info.action |= ATA_EH_RESET;
5060 ata_ehi_push_desc(&link->eh_info, "waking up from sleep");
5061 ata_link_abort(link);
5065 ap->ops->qc_prep(qc);
5067 qc->err_mask |= ap->ops->qc_issue(qc);
5068 if (unlikely(qc->err_mask))
5073 qc->err_mask |= AC_ERR_SYSTEM;
5075 ata_qc_complete(qc);
5079 * sata_scr_valid - test whether SCRs are accessible
5080 * @link: ATA link to test SCR accessibility for
5082 * Test whether SCRs are accessible for @link.
5088 * 1 if SCRs are accessible, 0 otherwise.
5090 int sata_scr_valid(struct ata_link *link)
5092 struct ata_port *ap = link->ap;
5094 return (ap->flags & ATA_FLAG_SATA) && ap->ops->scr_read;
5098 * sata_scr_read - read SCR register of the specified port
5099 * @link: ATA link to read SCR for
5101 * @val: Place to store read value
5103 * Read SCR register @reg of @link into *@val. This function is
5104 * guaranteed to succeed if @link is ap->link, the cable type of
5105 * the port is SATA and the port implements ->scr_read.
5108 * None if @link is ap->link. Kernel thread context otherwise.
5111 * 0 on success, negative errno on failure.
5113 int sata_scr_read(struct ata_link *link, int reg, u32 *val)
5115 if (ata_is_host_link(link)) {
5116 if (sata_scr_valid(link))
5117 return link->ap->ops->scr_read(link, reg, val);
5121 return sata_pmp_scr_read(link, reg, val);
5125 * sata_scr_write - write SCR register of the specified port
5126 * @link: ATA link to write SCR for
5127 * @reg: SCR to write
5128 * @val: value to write
5130 * Write @val to SCR register @reg of @link. This function is
5131 * guaranteed to succeed if @link is ap->link, the cable type of
5132 * the port is SATA and the port implements ->scr_read.
5135 * None if @link is ap->link. Kernel thread context otherwise.
5138 * 0 on success, negative errno on failure.
5140 int sata_scr_write(struct ata_link *link, int reg, u32 val)
5142 if (ata_is_host_link(link)) {
5143 if (sata_scr_valid(link))
5144 return link->ap->ops->scr_write(link, reg, val);
5148 return sata_pmp_scr_write(link, reg, val);
5152 * sata_scr_write_flush - write SCR register of the specified port and flush
5153 * @link: ATA link to write SCR for
5154 * @reg: SCR to write
5155 * @val: value to write
5157 * This function is identical to sata_scr_write() except that this
5158 * function performs flush after writing to the register.
5161 * None if @link is ap->link. Kernel thread context otherwise.
5164 * 0 on success, negative errno on failure.
5166 int sata_scr_write_flush(struct ata_link *link, int reg, u32 val)
5168 if (ata_is_host_link(link)) {
5171 if (sata_scr_valid(link)) {
5172 rc = link->ap->ops->scr_write(link, reg, val);
5174 rc = link->ap->ops->scr_read(link, reg, &val);
5180 return sata_pmp_scr_write(link, reg, val);
5184 * ata_phys_link_online - test whether the given link is online
5185 * @link: ATA link to test
5187 * Test whether @link is online. Note that this function returns
5188 * 0 if online status of @link cannot be obtained, so
5189 * ata_link_online(link) != !ata_link_offline(link).
5195 * True if the port online status is available and online.
5197 bool ata_phys_link_online(struct ata_link *link)
5201 if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0 &&
5202 ata_sstatus_online(sstatus))
5208 * ata_phys_link_offline - test whether the given link is offline
5209 * @link: ATA link to test
5211 * Test whether @link is offline. Note that this function
5212 * returns 0 if offline status of @link cannot be obtained, so
5213 * ata_link_online(link) != !ata_link_offline(link).
5219 * True if the port offline status is available and offline.
5221 bool ata_phys_link_offline(struct ata_link *link)
5225 if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0 &&
5226 !ata_sstatus_online(sstatus))
5232 * ata_link_online - test whether the given link is online
5233 * @link: ATA link to test
5235 * Test whether @link is online. This is identical to
5236 * ata_phys_link_online() when there's no slave link. When
5237 * there's a slave link, this function should only be called on
5238 * the master link and will return true if any of M/S links is
5245 * True if the port online status is available and online.
5247 bool ata_link_online(struct ata_link *link)
5249 struct ata_link *slave = link->ap->slave_link;
5251 WARN_ON(link == slave); /* shouldn't be called on slave link */
5253 return ata_phys_link_online(link) ||
5254 (slave && ata_phys_link_online(slave));
5258 * ata_link_offline - test whether the given link is offline
5259 * @link: ATA link to test
5261 * Test whether @link is offline. This is identical to
5262 * ata_phys_link_offline() when there's no slave link. When
5263 * there's a slave link, this function should only be called on
5264 * the master link and will return true if both M/S links are
5271 * True if the port offline status is available and offline.
5273 bool ata_link_offline(struct ata_link *link)
5275 struct ata_link *slave = link->ap->slave_link;
5277 WARN_ON(link == slave); /* shouldn't be called on slave link */
5279 return ata_phys_link_offline(link) &&
5280 (!slave || ata_phys_link_offline(slave));
5284 static int ata_port_request_pm(struct ata_port *ap, pm_message_t mesg,
5285 unsigned int action, unsigned int ehi_flags,
5288 struct ata_link *link;
5289 unsigned long flags;
5292 /* Previous resume operation might still be in
5293 * progress. Wait for PM_PENDING to clear.
5295 if (ap->pflags & ATA_PFLAG_PM_PENDING) {
5300 ata_port_wait_eh(ap);
5301 WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING);
5304 /* request PM ops to EH */
5305 spin_lock_irqsave(ap->lock, flags);
5309 ap->pm_result = async;
5311 ap->pm_result = &rc;
5313 ap->pflags |= ATA_PFLAG_PM_PENDING;
5314 ata_for_each_link(link, ap, HOST_FIRST) {
5315 link->eh_info.action |= action;
5316 link->eh_info.flags |= ehi_flags;
5319 ata_port_schedule_eh(ap);
5321 spin_unlock_irqrestore(ap->lock, flags);
5323 /* wait and check result */
5325 ata_port_wait_eh(ap);
5326 WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING);
5332 static int __ata_port_suspend_common(struct ata_port *ap, pm_message_t mesg, int *async)
5334 unsigned int ehi_flags = ATA_EHI_QUIET;
5338 * On some hardware, device fails to respond after spun down
5339 * for suspend. As the device won't be used before being
5340 * resumed, we don't need to touch the device. Ask EH to skip
5341 * the usual stuff and proceed directly to suspend.
5343 * http://thread.gmane.org/gmane.linux.ide/46764
5345 if (mesg.event == PM_EVENT_SUSPEND)
5346 ehi_flags |= ATA_EHI_NO_AUTOPSY | ATA_EHI_NO_RECOVERY;
5348 rc = ata_port_request_pm(ap, mesg, 0, ehi_flags, async);
5352 static int ata_port_suspend_common(struct device *dev, pm_message_t mesg)
5354 struct ata_port *ap = to_ata_port(dev);
5356 return __ata_port_suspend_common(ap, mesg, NULL);
5359 static int ata_port_suspend(struct device *dev)
5361 if (pm_runtime_suspended(dev))
5364 return ata_port_suspend_common(dev, PMSG_SUSPEND);
5367 static int ata_port_do_freeze(struct device *dev)
5369 if (pm_runtime_suspended(dev))
5370 pm_runtime_resume(dev);
5372 return ata_port_suspend_common(dev, PMSG_FREEZE);
5375 static int ata_port_poweroff(struct device *dev)
5377 if (pm_runtime_suspended(dev))
5380 return ata_port_suspend_common(dev, PMSG_HIBERNATE);
5383 static int __ata_port_resume_common(struct ata_port *ap, int *async)
5387 rc = ata_port_request_pm(ap, PMSG_ON, ATA_EH_RESET,
5388 ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET, async);
5392 static int ata_port_resume_common(struct device *dev)
5394 struct ata_port *ap = to_ata_port(dev);
5396 return __ata_port_resume_common(ap, NULL);
5399 static int ata_port_resume(struct device *dev)
5403 rc = ata_port_resume_common(dev);
5405 pm_runtime_disable(dev);
5406 pm_runtime_set_active(dev);
5407 pm_runtime_enable(dev);
5413 static int ata_port_runtime_idle(struct device *dev)
5415 return pm_runtime_suspend(dev);
5418 static const struct dev_pm_ops ata_port_pm_ops = {
5419 .suspend = ata_port_suspend,
5420 .resume = ata_port_resume,
5421 .freeze = ata_port_do_freeze,
5422 .thaw = ata_port_resume,
5423 .poweroff = ata_port_poweroff,
5424 .restore = ata_port_resume,
5426 .runtime_suspend = ata_port_suspend,
5427 .runtime_resume = ata_port_resume_common,
5428 .runtime_idle = ata_port_runtime_idle,
5431 /* sas ports don't participate in pm runtime management of ata_ports,
5432 * and need to resume ata devices at the domain level, not the per-port
5433 * level. sas suspend/resume is async to allow parallel port recovery
5434 * since sas has multiple ata_port instances per Scsi_Host.
5436 int ata_sas_port_async_suspend(struct ata_port *ap, int *async)
5438 return __ata_port_suspend_common(ap, PMSG_SUSPEND, async);
5440 EXPORT_SYMBOL_GPL(ata_sas_port_async_suspend);
5442 int ata_sas_port_async_resume(struct ata_port *ap, int *async)
5444 return __ata_port_resume_common(ap, async);
5446 EXPORT_SYMBOL_GPL(ata_sas_port_async_resume);
5450 * ata_host_suspend - suspend host
5451 * @host: host to suspend
5454 * Suspend @host. Actual operation is performed by port suspend.
5456 int ata_host_suspend(struct ata_host *host, pm_message_t mesg)
5458 host->dev->power.power_state = mesg;
5463 * ata_host_resume - resume host
5464 * @host: host to resume
5466 * Resume @host. Actual operation is performed by port resume.
5468 void ata_host_resume(struct ata_host *host)
5470 host->dev->power.power_state = PMSG_ON;
5474 struct device_type ata_port_type = {
5477 .pm = &ata_port_pm_ops,
5482 * ata_dev_init - Initialize an ata_device structure
5483 * @dev: Device structure to initialize
5485 * Initialize @dev in preparation for probing.
5488 * Inherited from caller.
5490 void ata_dev_init(struct ata_device *dev)
5492 struct ata_link *link = ata_dev_phys_link(dev);
5493 struct ata_port *ap = link->ap;
5494 unsigned long flags;
5496 /* SATA spd limit is bound to the attached device, reset together */
5497 link->sata_spd_limit = link->hw_sata_spd_limit;
5500 /* High bits of dev->flags are used to record warm plug
5501 * requests which occur asynchronously. Synchronize using
5504 spin_lock_irqsave(ap->lock, flags);
5505 dev->flags &= ~ATA_DFLAG_INIT_MASK;
5507 spin_unlock_irqrestore(ap->lock, flags);
5509 memset((void *)dev + ATA_DEVICE_CLEAR_BEGIN, 0,
5510 ATA_DEVICE_CLEAR_END - ATA_DEVICE_CLEAR_BEGIN);
5511 dev->pio_mask = UINT_MAX;
5512 dev->mwdma_mask = UINT_MAX;
5513 dev->udma_mask = UINT_MAX;
5517 * ata_link_init - Initialize an ata_link structure
5518 * @ap: ATA port link is attached to
5519 * @link: Link structure to initialize
5520 * @pmp: Port multiplier port number
5525 * Kernel thread context (may sleep)
5527 void ata_link_init(struct ata_port *ap, struct ata_link *link, int pmp)
5531 /* clear everything except for devices */
5532 memset((void *)link + ATA_LINK_CLEAR_BEGIN, 0,
5533 ATA_LINK_CLEAR_END - ATA_LINK_CLEAR_BEGIN);
5537 link->active_tag = ATA_TAG_POISON;
5538 link->hw_sata_spd_limit = UINT_MAX;
5540 /* can't use iterator, ap isn't initialized yet */
5541 for (i = 0; i < ATA_MAX_DEVICES; i++) {
5542 struct ata_device *dev = &link->device[i];
5545 dev->devno = dev - link->device;
5546 #ifdef CONFIG_ATA_ACPI
5547 dev->gtf_filter = ata_acpi_gtf_filter;
5554 * sata_link_init_spd - Initialize link->sata_spd_limit
5555 * @link: Link to configure sata_spd_limit for
5557 * Initialize @link->[hw_]sata_spd_limit to the currently
5561 * Kernel thread context (may sleep).
5564 * 0 on success, -errno on failure.
5566 int sata_link_init_spd(struct ata_link *link)
5571 rc = sata_scr_read(link, SCR_CONTROL, &link->saved_scontrol);
5575 spd = (link->saved_scontrol >> 4) & 0xf;
5577 link->hw_sata_spd_limit &= (1 << spd) - 1;
5579 ata_force_link_limits(link);
5581 link->sata_spd_limit = link->hw_sata_spd_limit;
5587 * ata_port_alloc - allocate and initialize basic ATA port resources
5588 * @host: ATA host this allocated port belongs to
5590 * Allocate and initialize basic ATA port resources.
5593 * Allocate ATA port on success, NULL on failure.
5596 * Inherited from calling layer (may sleep).
5598 struct ata_port *ata_port_alloc(struct ata_host *host)
5600 struct ata_port *ap;
5604 ap = kzalloc(sizeof(*ap), GFP_KERNEL);
5608 ap->pflags |= ATA_PFLAG_INITIALIZING | ATA_PFLAG_FROZEN;
5609 ap->lock = &host->lock;
5612 ap->dev = host->dev;
5614 #if defined(ATA_VERBOSE_DEBUG)
5615 /* turn on all debugging levels */
5616 ap->msg_enable = 0x00FF;
5617 #elif defined(ATA_DEBUG)
5618 ap->msg_enable = ATA_MSG_DRV | ATA_MSG_INFO | ATA_MSG_CTL | ATA_MSG_WARN | ATA_MSG_ERR;
5620 ap->msg_enable = ATA_MSG_DRV | ATA_MSG_ERR | ATA_MSG_WARN;
5623 mutex_init(&ap->scsi_scan_mutex);
5624 INIT_DELAYED_WORK(&ap->hotplug_task, ata_scsi_hotplug);
5625 INIT_WORK(&ap->scsi_rescan_task, ata_scsi_dev_rescan);
5626 INIT_LIST_HEAD(&ap->eh_done_q);
5627 init_waitqueue_head(&ap->eh_wait_q);
5628 init_completion(&ap->park_req_pending);
5629 init_timer_deferrable(&ap->fastdrain_timer);
5630 ap->fastdrain_timer.function = ata_eh_fastdrain_timerfn;
5631 ap->fastdrain_timer.data = (unsigned long)ap;
5633 ap->cbl = ATA_CBL_NONE;
5635 ata_link_init(ap, &ap->link, 0);
5638 ap->stats.unhandled_irq = 1;
5639 ap->stats.idle_irq = 1;
5641 ata_sff_port_init(ap);
5646 static void ata_host_release(struct device *gendev, void *res)
5648 struct ata_host *host = dev_get_drvdata(gendev);
5651 for (i = 0; i < host->n_ports; i++) {
5652 struct ata_port *ap = host->ports[i];
5658 scsi_host_put(ap->scsi_host);
5660 kfree(ap->pmp_link);
5661 kfree(ap->slave_link);
5663 host->ports[i] = NULL;
5666 dev_set_drvdata(gendev, NULL);
5670 * ata_host_alloc - allocate and init basic ATA host resources
5671 * @dev: generic device this host is associated with
5672 * @max_ports: maximum number of ATA ports associated with this host
5674 * Allocate and initialize basic ATA host resources. LLD calls
5675 * this function to allocate a host, initializes it fully and
5676 * attaches it using ata_host_register().
5678 * @max_ports ports are allocated and host->n_ports is
5679 * initialized to @max_ports. The caller is allowed to decrease
5680 * host->n_ports before calling ata_host_register(). The unused
5681 * ports will be automatically freed on registration.
5684 * Allocate ATA host on success, NULL on failure.
5687 * Inherited from calling layer (may sleep).
5689 struct ata_host *ata_host_alloc(struct device *dev, int max_ports)
5691 struct ata_host *host;
5697 if (!devres_open_group(dev, NULL, GFP_KERNEL))
5700 /* alloc a container for our list of ATA ports (buses) */
5701 sz = sizeof(struct ata_host) + (max_ports + 1) * sizeof(void *);
5702 /* alloc a container for our list of ATA ports (buses) */
5703 host = devres_alloc(ata_host_release, sz, GFP_KERNEL);
5707 devres_add(dev, host);
5708 dev_set_drvdata(dev, host);
5710 spin_lock_init(&host->lock);
5711 mutex_init(&host->eh_mutex);
5713 host->n_ports = max_ports;
5715 /* allocate ports bound to this host */
5716 for (i = 0; i < max_ports; i++) {
5717 struct ata_port *ap;
5719 ap = ata_port_alloc(host);
5724 host->ports[i] = ap;
5727 devres_remove_group(dev, NULL);
5731 devres_release_group(dev, NULL);
5736 * ata_host_alloc_pinfo - alloc host and init with port_info array
5737 * @dev: generic device this host is associated with
5738 * @ppi: array of ATA port_info to initialize host with
5739 * @n_ports: number of ATA ports attached to this host
5741 * Allocate ATA host and initialize with info from @ppi. If NULL
5742 * terminated, @ppi may contain fewer entries than @n_ports. The
5743 * last entry will be used for the remaining ports.
5746 * Allocate ATA host on success, NULL on failure.
5749 * Inherited from calling layer (may sleep).
5751 struct ata_host *ata_host_alloc_pinfo(struct device *dev,
5752 const struct ata_port_info * const * ppi,
5755 const struct ata_port_info *pi;
5756 struct ata_host *host;
5759 host = ata_host_alloc(dev, n_ports);
5763 for (i = 0, j = 0, pi = NULL; i < host->n_ports; i++) {
5764 struct ata_port *ap = host->ports[i];
5769 ap->pio_mask = pi->pio_mask;
5770 ap->mwdma_mask = pi->mwdma_mask;
5771 ap->udma_mask = pi->udma_mask;
5772 ap->flags |= pi->flags;
5773 ap->link.flags |= pi->link_flags;
5774 ap->ops = pi->port_ops;
5776 if (!host->ops && (pi->port_ops != &ata_dummy_port_ops))
5777 host->ops = pi->port_ops;
5784 * ata_slave_link_init - initialize slave link
5785 * @ap: port to initialize slave link for
5787 * Create and initialize slave link for @ap. This enables slave
5788 * link handling on the port.
5790 * In libata, a port contains links and a link contains devices.
5791 * There is single host link but if a PMP is attached to it,
5792 * there can be multiple fan-out links. On SATA, there's usually
5793 * a single device connected to a link but PATA and SATA
5794 * controllers emulating TF based interface can have two - master
5797 * However, there are a few controllers which don't fit into this
5798 * abstraction too well - SATA controllers which emulate TF
5799 * interface with both master and slave devices but also have
5800 * separate SCR register sets for each device. These controllers
5801 * need separate links for physical link handling
5802 * (e.g. onlineness, link speed) but should be treated like a
5803 * traditional M/S controller for everything else (e.g. command
5804 * issue, softreset).
5806 * slave_link is libata's way of handling this class of
5807 * controllers without impacting core layer too much. For
5808 * anything other than physical link handling, the default host
5809 * link is used for both master and slave. For physical link
5810 * handling, separate @ap->slave_link is used. All dirty details
5811 * are implemented inside libata core layer. From LLD's POV, the
5812 * only difference is that prereset, hardreset and postreset are
5813 * called once more for the slave link, so the reset sequence
5814 * looks like the following.
5816 * prereset(M) -> prereset(S) -> hardreset(M) -> hardreset(S) ->
5817 * softreset(M) -> postreset(M) -> postreset(S)
5819 * Note that softreset is called only for the master. Softreset
5820 * resets both M/S by definition, so SRST on master should handle
5821 * both (the standard method will work just fine).
5824 * Should be called before host is registered.
5827 * 0 on success, -errno on failure.
5829 int ata_slave_link_init(struct ata_port *ap)
5831 struct ata_link *link;
5833 WARN_ON(ap->slave_link);
5834 WARN_ON(ap->flags & ATA_FLAG_PMP);
5836 link = kzalloc(sizeof(*link), GFP_KERNEL);
5840 ata_link_init(ap, link, 1);
5841 ap->slave_link = link;
5845 static void ata_host_stop(struct device *gendev, void *res)
5847 struct ata_host *host = dev_get_drvdata(gendev);
5850 WARN_ON(!(host->flags & ATA_HOST_STARTED));
5852 for (i = 0; i < host->n_ports; i++) {
5853 struct ata_port *ap = host->ports[i];
5855 if (ap->ops->port_stop)
5856 ap->ops->port_stop(ap);
5859 if (host->ops->host_stop)
5860 host->ops->host_stop(host);
5864 * ata_finalize_port_ops - finalize ata_port_operations
5865 * @ops: ata_port_operations to finalize
5867 * An ata_port_operations can inherit from another ops and that
5868 * ops can again inherit from another. This can go on as many
5869 * times as necessary as long as there is no loop in the
5870 * inheritance chain.
5872 * Ops tables are finalized when the host is started. NULL or
5873 * unspecified entries are inherited from the closet ancestor
5874 * which has the method and the entry is populated with it.
5875 * After finalization, the ops table directly points to all the
5876 * methods and ->inherits is no longer necessary and cleared.
5878 * Using ATA_OP_NULL, inheriting ops can force a method to NULL.
5883 static void ata_finalize_port_ops(struct ata_port_operations *ops)
5885 static DEFINE_SPINLOCK(lock);
5886 const struct ata_port_operations *cur;
5887 void **begin = (void **)ops;
5888 void **end = (void **)&ops->inherits;
5891 if (!ops || !ops->inherits)
5896 for (cur = ops->inherits; cur; cur = cur->inherits) {
5897 void **inherit = (void **)cur;
5899 for (pp = begin; pp < end; pp++, inherit++)
5904 for (pp = begin; pp < end; pp++)
5908 ops->inherits = NULL;
5914 * ata_host_start - start and freeze ports of an ATA host
5915 * @host: ATA host to start ports for
5917 * Start and then freeze ports of @host. Started status is
5918 * recorded in host->flags, so this function can be called
5919 * multiple times. Ports are guaranteed to get started only
5920 * once. If host->ops isn't initialized yet, its set to the
5921 * first non-dummy port ops.
5924 * Inherited from calling layer (may sleep).
5927 * 0 if all ports are started successfully, -errno otherwise.
5929 int ata_host_start(struct ata_host *host)
5932 void *start_dr = NULL;
5935 if (host->flags & ATA_HOST_STARTED)
5938 ata_finalize_port_ops(host->ops);
5940 for (i = 0; i < host->n_ports; i++) {
5941 struct ata_port *ap = host->ports[i];
5943 ata_finalize_port_ops(ap->ops);
5945 if (!host->ops && !ata_port_is_dummy(ap))
5946 host->ops = ap->ops;
5948 if (ap->ops->port_stop)
5952 if (host->ops->host_stop)
5956 start_dr = devres_alloc(ata_host_stop, 0, GFP_KERNEL);
5961 for (i = 0; i < host->n_ports; i++) {
5962 struct ata_port *ap = host->ports[i];
5964 if (ap->ops->port_start) {
5965 rc = ap->ops->port_start(ap);
5969 "failed to start port %d (errno=%d)\n",
5974 ata_eh_freeze_port(ap);
5978 devres_add(host->dev, start_dr);
5979 host->flags |= ATA_HOST_STARTED;
5984 struct ata_port *ap = host->ports[i];
5986 if (ap->ops->port_stop)
5987 ap->ops->port_stop(ap);
5989 devres_free(start_dr);
5994 * ata_sas_host_init - Initialize a host struct for sas (ipr, libsas)
5995 * @host: host to initialize
5996 * @dev: device host is attached to
6000 void ata_host_init(struct ata_host *host, struct device *dev,
6001 struct ata_port_operations *ops)
6003 spin_lock_init(&host->lock);
6004 mutex_init(&host->eh_mutex);
6009 void __ata_port_probe(struct ata_port *ap)
6011 struct ata_eh_info *ehi = &ap->link.eh_info;
6012 unsigned long flags;
6014 /* kick EH for boot probing */
6015 spin_lock_irqsave(ap->lock, flags);
6017 ehi->probe_mask |= ATA_ALL_DEVICES;
6018 ehi->action |= ATA_EH_RESET;
6019 ehi->flags |= ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET;
6021 ap->pflags &= ~ATA_PFLAG_INITIALIZING;
6022 ap->pflags |= ATA_PFLAG_LOADING;
6023 ata_port_schedule_eh(ap);
6025 spin_unlock_irqrestore(ap->lock, flags);
6028 int ata_port_probe(struct ata_port *ap)
6032 if (ap->ops->error_handler) {
6033 __ata_port_probe(ap);
6034 ata_port_wait_eh(ap);
6036 DPRINTK("ata%u: bus probe begin\n", ap->print_id);
6037 rc = ata_bus_probe(ap);
6038 DPRINTK("ata%u: bus probe end\n", ap->print_id);
6044 static void async_port_probe(void *data, async_cookie_t cookie)
6046 struct ata_port *ap = data;
6049 * If we're not allowed to scan this host in parallel,
6050 * we need to wait until all previous scans have completed
6051 * before going further.
6052 * Jeff Garzik says this is only within a controller, so we
6053 * don't need to wait for port 0, only for later ports.
6055 if (!(ap->host->flags & ATA_HOST_PARALLEL_SCAN) && ap->port_no != 0)
6056 async_synchronize_cookie(cookie);
6058 (void)ata_port_probe(ap);
6060 /* in order to keep device order, we need to synchronize at this point */
6061 async_synchronize_cookie(cookie);
6063 ata_scsi_scan_host(ap, 1);
6067 * ata_host_register - register initialized ATA host
6068 * @host: ATA host to register
6069 * @sht: template for SCSI host
6071 * Register initialized ATA host. @host is allocated using
6072 * ata_host_alloc() and fully initialized by LLD. This function
6073 * starts ports, registers @host with ATA and SCSI layers and
6074 * probe registered devices.
6077 * Inherited from calling layer (may sleep).
6080 * 0 on success, -errno otherwise.
6082 int ata_host_register(struct ata_host *host, struct scsi_host_template *sht)
6086 /* host must have been started */
6087 if (!(host->flags & ATA_HOST_STARTED)) {
6088 dev_err(host->dev, "BUG: trying to register unstarted host\n");
6093 /* Blow away unused ports. This happens when LLD can't
6094 * determine the exact number of ports to allocate at
6097 for (i = host->n_ports; host->ports[i]; i++)
6098 kfree(host->ports[i]);
6100 /* give ports names and add SCSI hosts */
6101 for (i = 0; i < host->n_ports; i++)
6102 host->ports[i]->print_id = atomic_inc_return(&ata_print_id);
6105 /* Create associated sysfs transport objects */
6106 for (i = 0; i < host->n_ports; i++) {
6107 rc = ata_tport_add(host->dev,host->ports[i]);
6113 rc = ata_scsi_add_hosts(host, sht);
6117 /* set cable, sata_spd_limit and report */
6118 for (i = 0; i < host->n_ports; i++) {
6119 struct ata_port *ap = host->ports[i];
6120 unsigned long xfer_mask;
6122 /* set SATA cable type if still unset */
6123 if (ap->cbl == ATA_CBL_NONE && (ap->flags & ATA_FLAG_SATA))
6124 ap->cbl = ATA_CBL_SATA;
6126 /* init sata_spd_limit to the current value */
6127 sata_link_init_spd(&ap->link);
6129 sata_link_init_spd(ap->slave_link);
6131 /* print per-port info to dmesg */
6132 xfer_mask = ata_pack_xfermask(ap->pio_mask, ap->mwdma_mask,
6135 if (!ata_port_is_dummy(ap)) {
6136 ata_port_info(ap, "%cATA max %s %s\n",
6137 (ap->flags & ATA_FLAG_SATA) ? 'S' : 'P',
6138 ata_mode_string(xfer_mask),
6139 ap->link.eh_info.desc);
6140 ata_ehi_clear_desc(&ap->link.eh_info);
6142 ata_port_info(ap, "DUMMY\n");
6145 /* perform each probe asynchronously */
6146 for (i = 0; i < host->n_ports; i++) {
6147 struct ata_port *ap = host->ports[i];
6148 async_schedule(async_port_probe, ap);
6155 ata_tport_delete(host->ports[i]);
6162 * ata_host_activate - start host, request IRQ and register it
6163 * @host: target ATA host
6164 * @irq: IRQ to request
6165 * @irq_handler: irq_handler used when requesting IRQ
6166 * @irq_flags: irq_flags used when requesting IRQ
6167 * @sht: scsi_host_template to use when registering the host
6169 * After allocating an ATA host and initializing it, most libata
6170 * LLDs perform three steps to activate the host - start host,
6171 * request IRQ and register it. This helper takes necessasry
6172 * arguments and performs the three steps in one go.
6174 * An invalid IRQ skips the IRQ registration and expects the host to
6175 * have set polling mode on the port. In this case, @irq_handler
6179 * Inherited from calling layer (may sleep).
6182 * 0 on success, -errno otherwise.
6184 int ata_host_activate(struct ata_host *host, int irq,
6185 irq_handler_t irq_handler, unsigned long irq_flags,
6186 struct scsi_host_template *sht)
6190 rc = ata_host_start(host);
6194 /* Special case for polling mode */
6196 WARN_ON(irq_handler);
6197 return ata_host_register(host, sht);
6200 rc = devm_request_irq(host->dev, irq, irq_handler, irq_flags,
6201 dev_driver_string(host->dev), host);
6205 for (i = 0; i < host->n_ports; i++)
6206 ata_port_desc(host->ports[i], "irq %d", irq);
6208 rc = ata_host_register(host, sht);
6209 /* if failed, just free the IRQ and leave ports alone */
6211 devm_free_irq(host->dev, irq, host);
6217 * ata_port_detach - Detach ATA port in prepration of device removal
6218 * @ap: ATA port to be detached
6220 * Detach all ATA devices and the associated SCSI devices of @ap;
6221 * then, remove the associated SCSI host. @ap is guaranteed to
6222 * be quiescent on return from this function.
6225 * Kernel thread context (may sleep).
6227 static void ata_port_detach(struct ata_port *ap)
6229 unsigned long flags;
6231 if (!ap->ops->error_handler)
6234 /* tell EH we're leaving & flush EH */
6235 spin_lock_irqsave(ap->lock, flags);
6236 ap->pflags |= ATA_PFLAG_UNLOADING;
6237 ata_port_schedule_eh(ap);
6238 spin_unlock_irqrestore(ap->lock, flags);
6240 /* wait till EH commits suicide */
6241 ata_port_wait_eh(ap);
6243 /* it better be dead now */
6244 WARN_ON(!(ap->pflags & ATA_PFLAG_UNLOADED));
6246 cancel_delayed_work_sync(&ap->hotplug_task);
6251 for (i = 0; i < SATA_PMP_MAX_PORTS; i++)
6252 ata_tlink_delete(&ap->pmp_link[i]);
6254 ata_tport_delete(ap);
6256 /* remove the associated SCSI host */
6257 scsi_remove_host(ap->scsi_host);
6261 * ata_host_detach - Detach all ports of an ATA host
6262 * @host: Host to detach
6264 * Detach all ports of @host.
6267 * Kernel thread context (may sleep).
6269 void ata_host_detach(struct ata_host *host)
6273 for (i = 0; i < host->n_ports; i++)
6274 ata_port_detach(host->ports[i]);
6276 /* the host is dead now, dissociate ACPI */
6277 ata_acpi_dissociate(host);
6283 * ata_pci_remove_one - PCI layer callback for device removal
6284 * @pdev: PCI device that was removed
6286 * PCI layer indicates to libata via this hook that hot-unplug or
6287 * module unload event has occurred. Detach all ports. Resource
6288 * release is handled via devres.
6291 * Inherited from PCI layer (may sleep).
6293 void ata_pci_remove_one(struct pci_dev *pdev)
6295 struct ata_host *host = pci_get_drvdata(pdev);
6297 ata_host_detach(host);
6300 /* move to PCI subsystem */
6301 int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits)
6303 unsigned long tmp = 0;
6305 switch (bits->width) {
6308 pci_read_config_byte(pdev, bits->reg, &tmp8);
6314 pci_read_config_word(pdev, bits->reg, &tmp16);
6320 pci_read_config_dword(pdev, bits->reg, &tmp32);
6331 return (tmp == bits->val) ? 1 : 0;
6335 void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg)
6337 pci_save_state(pdev);
6338 pci_disable_device(pdev);
6340 if (mesg.event & PM_EVENT_SLEEP)
6341 pci_set_power_state(pdev, PCI_D3hot);
6344 int ata_pci_device_do_resume(struct pci_dev *pdev)
6348 pci_set_power_state(pdev, PCI_D0);
6349 pci_restore_state(pdev);
6351 rc = pcim_enable_device(pdev);
6354 "failed to enable device after resume (%d)\n", rc);
6358 pci_set_master(pdev);
6362 int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg)
6364 struct ata_host *host = pci_get_drvdata(pdev);
6367 rc = ata_host_suspend(host, mesg);
6371 ata_pci_device_do_suspend(pdev, mesg);
6376 int ata_pci_device_resume(struct pci_dev *pdev)
6378 struct ata_host *host = pci_get_drvdata(pdev);
6381 rc = ata_pci_device_do_resume(pdev);
6383 ata_host_resume(host);
6386 #endif /* CONFIG_PM */
6388 #endif /* CONFIG_PCI */
6391 * ata_platform_remove_one - Platform layer callback for device removal
6392 * @pdev: Platform device that was removed
6394 * Platform layer indicates to libata via this hook that hot-unplug or
6395 * module unload event has occurred. Detach all ports. Resource
6396 * release is handled via devres.
6399 * Inherited from platform layer (may sleep).
6401 int ata_platform_remove_one(struct platform_device *pdev)
6403 struct ata_host *host = platform_get_drvdata(pdev);
6405 ata_host_detach(host);
6410 static int __init ata_parse_force_one(char **cur,
6411 struct ata_force_ent *force_ent,
6412 const char **reason)
6414 /* FIXME: Currently, there's no way to tag init const data and
6415 * using __initdata causes build failure on some versions of
6416 * gcc. Once __initdataconst is implemented, add const to the
6417 * following structure.
6419 static struct ata_force_param force_tbl[] __initdata = {
6420 { "40c", .cbl = ATA_CBL_PATA40 },
6421 { "80c", .cbl = ATA_CBL_PATA80 },
6422 { "short40c", .cbl = ATA_CBL_PATA40_SHORT },
6423 { "unk", .cbl = ATA_CBL_PATA_UNK },
6424 { "ign", .cbl = ATA_CBL_PATA_IGN },
6425 { "sata", .cbl = ATA_CBL_SATA },
6426 { "1.5Gbps", .spd_limit = 1 },
6427 { "3.0Gbps", .spd_limit = 2 },
6428 { "noncq", .horkage_on = ATA_HORKAGE_NONCQ },
6429 { "ncq", .horkage_off = ATA_HORKAGE_NONCQ },
6430 { "dump_id", .horkage_on = ATA_HORKAGE_DUMP_ID },
6431 { "pio0", .xfer_mask = 1 << (ATA_SHIFT_PIO + 0) },
6432 { "pio1", .xfer_mask = 1 << (ATA_SHIFT_PIO + 1) },
6433 { "pio2", .xfer_mask = 1 << (ATA_SHIFT_PIO + 2) },
6434 { "pio3", .xfer_mask = 1 << (ATA_SHIFT_PIO + 3) },
6435 { "pio4", .xfer_mask = 1 << (ATA_SHIFT_PIO + 4) },
6436 { "pio5", .xfer_mask = 1 << (ATA_SHIFT_PIO + 5) },
6437 { "pio6", .xfer_mask = 1 << (ATA_SHIFT_PIO + 6) },
6438 { "mwdma0", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 0) },
6439 { "mwdma1", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 1) },
6440 { "mwdma2", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 2) },
6441 { "mwdma3", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 3) },
6442 { "mwdma4", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 4) },
6443 { "udma0", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 0) },
6444 { "udma16", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 0) },
6445 { "udma/16", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 0) },
6446 { "udma1", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 1) },
6447 { "udma25", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 1) },
6448 { "udma/25", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 1) },
6449 { "udma2", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 2) },
6450 { "udma33", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 2) },
6451 { "udma/33", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 2) },
6452 { "udma3", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 3) },
6453 { "udma44", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 3) },
6454 { "udma/44", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 3) },
6455 { "udma4", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 4) },
6456 { "udma66", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 4) },
6457 { "udma/66", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 4) },
6458 { "udma5", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 5) },
6459 { "udma100", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 5) },
6460 { "udma/100", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 5) },
6461 { "udma6", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 6) },
6462 { "udma133", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 6) },
6463 { "udma/133", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 6) },
6464 { "udma7", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 7) },
6465 { "nohrst", .lflags = ATA_LFLAG_NO_HRST },
6466 { "nosrst", .lflags = ATA_LFLAG_NO_SRST },
6467 { "norst", .lflags = ATA_LFLAG_NO_HRST | ATA_LFLAG_NO_SRST },
6468 { "rstonce", .lflags = ATA_LFLAG_RST_ONCE },
6470 char *start = *cur, *p = *cur;
6471 char *id, *val, *endp;
6472 const struct ata_force_param *match_fp = NULL;
6473 int nr_matches = 0, i;
6475 /* find where this param ends and update *cur */
6476 while (*p != '\0' && *p != ',')
6487 p = strchr(start, ':');
6489 val = strstrip(start);
6494 id = strstrip(start);
6495 val = strstrip(p + 1);
6498 p = strchr(id, '.');
6501 force_ent->device = simple_strtoul(p, &endp, 10);
6502 if (p == endp || *endp != '\0') {
6503 *reason = "invalid device";
6508 force_ent->port = simple_strtoul(id, &endp, 10);
6509 if (p == endp || *endp != '\0') {
6510 *reason = "invalid port/link";
6515 /* parse val, allow shortcuts so that both 1.5 and 1.5Gbps work */
6516 for (i = 0; i < ARRAY_SIZE(force_tbl); i++) {
6517 const struct ata_force_param *fp = &force_tbl[i];
6519 if (strncasecmp(val, fp->name, strlen(val)))
6525 if (strcasecmp(val, fp->name) == 0) {
6532 *reason = "unknown value";
6535 if (nr_matches > 1) {
6536 *reason = "ambigious value";
6540 force_ent->param = *match_fp;
6545 static void __init ata_parse_force_param(void)
6547 int idx = 0, size = 1;
6548 int last_port = -1, last_device = -1;
6549 char *p, *cur, *next;
6551 /* calculate maximum number of params and allocate force_tbl */
6552 for (p = ata_force_param_buf; *p; p++)
6556 ata_force_tbl = kzalloc(sizeof(ata_force_tbl[0]) * size, GFP_KERNEL);
6557 if (!ata_force_tbl) {
6558 printk(KERN_WARNING "ata: failed to extend force table, "
6559 "libata.force ignored\n");
6563 /* parse and populate the table */
6564 for (cur = ata_force_param_buf; *cur != '\0'; cur = next) {
6565 const char *reason = "";
6566 struct ata_force_ent te = { .port = -1, .device = -1 };
6569 if (ata_parse_force_one(&next, &te, &reason)) {
6570 printk(KERN_WARNING "ata: failed to parse force "
6571 "parameter \"%s\" (%s)\n",
6576 if (te.port == -1) {
6577 te.port = last_port;
6578 te.device = last_device;
6581 ata_force_tbl[idx++] = te;
6583 last_port = te.port;
6584 last_device = te.device;
6587 ata_force_tbl_size = idx;
6590 static int __init ata_init(void)
6594 ata_parse_force_param();
6596 ata_acpi_register();
6598 rc = ata_sff_init();
6600 kfree(ata_force_tbl);
6604 libata_transport_init();
6605 ata_scsi_transport_template = ata_attach_transport();
6606 if (!ata_scsi_transport_template) {
6612 printk(KERN_DEBUG "libata version " DRV_VERSION " loaded.\n");
6619 static void __exit ata_exit(void)
6621 ata_release_transport(ata_scsi_transport_template);
6622 libata_transport_exit();
6624 ata_acpi_unregister();
6625 kfree(ata_force_tbl);
6628 subsys_initcall(ata_init);
6629 module_exit(ata_exit);
6631 static DEFINE_RATELIMIT_STATE(ratelimit, HZ / 5, 1);
6633 int ata_ratelimit(void)
6635 return __ratelimit(&ratelimit);
6639 * ata_msleep - ATA EH owner aware msleep
6640 * @ap: ATA port to attribute the sleep to
6641 * @msecs: duration to sleep in milliseconds
6643 * Sleeps @msecs. If the current task is owner of @ap's EH, the
6644 * ownership is released before going to sleep and reacquired
6645 * after the sleep is complete. IOW, other ports sharing the
6646 * @ap->host will be allowed to own the EH while this task is
6652 void ata_msleep(struct ata_port *ap, unsigned int msecs)
6654 bool owns_eh = ap && ap->host->eh_owner == current;
6666 * ata_wait_register - wait until register value changes
6667 * @ap: ATA port to wait register for, can be NULL
6668 * @reg: IO-mapped register
6669 * @mask: Mask to apply to read register value
6670 * @val: Wait condition
6671 * @interval: polling interval in milliseconds
6672 * @timeout: timeout in milliseconds
6674 * Waiting for some bits of register to change is a common
6675 * operation for ATA controllers. This function reads 32bit LE
6676 * IO-mapped register @reg and tests for the following condition.
6678 * (*@reg & mask) != val
6680 * If the condition is met, it returns; otherwise, the process is
6681 * repeated after @interval_msec until timeout.
6684 * Kernel thread context (may sleep)
6687 * The final register value.
6689 u32 ata_wait_register(struct ata_port *ap, void __iomem *reg, u32 mask, u32 val,
6690 unsigned long interval, unsigned long timeout)
6692 unsigned long deadline;
6695 tmp = ioread32(reg);
6697 /* Calculate timeout _after_ the first read to make sure
6698 * preceding writes reach the controller before starting to
6699 * eat away the timeout.
6701 deadline = ata_deadline(jiffies, timeout);
6703 while ((tmp & mask) == val && time_before(jiffies, deadline)) {
6704 ata_msleep(ap, interval);
6705 tmp = ioread32(reg);
6714 static unsigned int ata_dummy_qc_issue(struct ata_queued_cmd *qc)
6716 return AC_ERR_SYSTEM;
6719 static void ata_dummy_error_handler(struct ata_port *ap)
6724 struct ata_port_operations ata_dummy_port_ops = {
6725 .qc_prep = ata_noop_qc_prep,
6726 .qc_issue = ata_dummy_qc_issue,
6727 .error_handler = ata_dummy_error_handler,
6728 .sched_eh = ata_std_sched_eh,
6729 .end_eh = ata_std_end_eh,
6732 const struct ata_port_info ata_dummy_port_info = {
6733 .port_ops = &ata_dummy_port_ops,
6737 * Utility print functions
6739 int ata_port_printk(const struct ata_port *ap, const char *level,
6740 const char *fmt, ...)
6742 struct va_format vaf;
6746 va_start(args, fmt);
6751 r = printk("%sata%u: %pV", level, ap->print_id, &vaf);
6757 EXPORT_SYMBOL(ata_port_printk);
6759 int ata_link_printk(const struct ata_link *link, const char *level,
6760 const char *fmt, ...)
6762 struct va_format vaf;
6766 va_start(args, fmt);
6771 if (sata_pmp_attached(link->ap) || link->ap->slave_link)
6772 r = printk("%sata%u.%02u: %pV",
6773 level, link->ap->print_id, link->pmp, &vaf);
6775 r = printk("%sata%u: %pV",
6776 level, link->ap->print_id, &vaf);
6782 EXPORT_SYMBOL(ata_link_printk);
6784 int ata_dev_printk(const struct ata_device *dev, const char *level,
6785 const char *fmt, ...)
6787 struct va_format vaf;
6791 va_start(args, fmt);
6796 r = printk("%sata%u.%02u: %pV",
6797 level, dev->link->ap->print_id, dev->link->pmp + dev->devno,
6804 EXPORT_SYMBOL(ata_dev_printk);
6806 void ata_print_version(const struct device *dev, const char *version)
6808 dev_printk(KERN_DEBUG, dev, "version %s\n", version);
6810 EXPORT_SYMBOL(ata_print_version);
6813 * libata is essentially a library of internal helper functions for
6814 * low-level ATA host controller drivers. As such, the API/ABI is
6815 * likely to change as new drivers are added and updated.
6816 * Do not depend on ABI/API stability.
6818 EXPORT_SYMBOL_GPL(sata_deb_timing_normal);
6819 EXPORT_SYMBOL_GPL(sata_deb_timing_hotplug);
6820 EXPORT_SYMBOL_GPL(sata_deb_timing_long);
6821 EXPORT_SYMBOL_GPL(ata_base_port_ops);
6822 EXPORT_SYMBOL_GPL(sata_port_ops);
6823 EXPORT_SYMBOL_GPL(ata_dummy_port_ops);
6824 EXPORT_SYMBOL_GPL(ata_dummy_port_info);
6825 EXPORT_SYMBOL_GPL(ata_link_next);
6826 EXPORT_SYMBOL_GPL(ata_dev_next);
6827 EXPORT_SYMBOL_GPL(ata_std_bios_param);
6828 EXPORT_SYMBOL_GPL(ata_scsi_unlock_native_capacity);
6829 EXPORT_SYMBOL_GPL(ata_host_init);
6830 EXPORT_SYMBOL_GPL(ata_host_alloc);
6831 EXPORT_SYMBOL_GPL(ata_host_alloc_pinfo);
6832 EXPORT_SYMBOL_GPL(ata_slave_link_init);
6833 EXPORT_SYMBOL_GPL(ata_host_start);
6834 EXPORT_SYMBOL_GPL(ata_host_register);
6835 EXPORT_SYMBOL_GPL(ata_host_activate);
6836 EXPORT_SYMBOL_GPL(ata_host_detach);
6837 EXPORT_SYMBOL_GPL(ata_sg_init);
6838 EXPORT_SYMBOL_GPL(ata_qc_complete);
6839 EXPORT_SYMBOL_GPL(ata_qc_complete_multiple);
6840 EXPORT_SYMBOL_GPL(atapi_cmd_type);
6841 EXPORT_SYMBOL_GPL(ata_tf_to_fis);
6842 EXPORT_SYMBOL_GPL(ata_tf_from_fis);
6843 EXPORT_SYMBOL_GPL(ata_pack_xfermask);
6844 EXPORT_SYMBOL_GPL(ata_unpack_xfermask);
6845 EXPORT_SYMBOL_GPL(ata_xfer_mask2mode);
6846 EXPORT_SYMBOL_GPL(ata_xfer_mode2mask);
6847 EXPORT_SYMBOL_GPL(ata_xfer_mode2shift);
6848 EXPORT_SYMBOL_GPL(ata_mode_string);
6849 EXPORT_SYMBOL_GPL(ata_id_xfermask);
6850 EXPORT_SYMBOL_GPL(ata_do_set_mode);
6851 EXPORT_SYMBOL_GPL(ata_std_qc_defer);
6852 EXPORT_SYMBOL_GPL(ata_noop_qc_prep);
6853 EXPORT_SYMBOL_GPL(ata_dev_disable);
6854 EXPORT_SYMBOL_GPL(sata_set_spd);
6855 EXPORT_SYMBOL_GPL(ata_wait_after_reset);
6856 EXPORT_SYMBOL_GPL(sata_link_debounce);
6857 EXPORT_SYMBOL_GPL(sata_link_resume);
6858 EXPORT_SYMBOL_GPL(sata_link_scr_lpm);
6859 EXPORT_SYMBOL_GPL(ata_std_prereset);
6860 EXPORT_SYMBOL_GPL(sata_link_hardreset);
6861 EXPORT_SYMBOL_GPL(sata_std_hardreset);
6862 EXPORT_SYMBOL_GPL(ata_std_postreset);
6863 EXPORT_SYMBOL_GPL(ata_dev_classify);
6864 EXPORT_SYMBOL_GPL(ata_dev_pair);
6865 EXPORT_SYMBOL_GPL(ata_ratelimit);
6866 EXPORT_SYMBOL_GPL(ata_msleep);
6867 EXPORT_SYMBOL_GPL(ata_wait_register);
6868 EXPORT_SYMBOL_GPL(ata_scsi_queuecmd);
6869 EXPORT_SYMBOL_GPL(ata_scsi_slave_config);
6870 EXPORT_SYMBOL_GPL(ata_scsi_slave_destroy);
6871 EXPORT_SYMBOL_GPL(ata_scsi_change_queue_depth);
6872 EXPORT_SYMBOL_GPL(__ata_change_queue_depth);
6873 EXPORT_SYMBOL_GPL(sata_scr_valid);
6874 EXPORT_SYMBOL_GPL(sata_scr_read);
6875 EXPORT_SYMBOL_GPL(sata_scr_write);
6876 EXPORT_SYMBOL_GPL(sata_scr_write_flush);
6877 EXPORT_SYMBOL_GPL(ata_link_online);
6878 EXPORT_SYMBOL_GPL(ata_link_offline);
6880 EXPORT_SYMBOL_GPL(ata_host_suspend);
6881 EXPORT_SYMBOL_GPL(ata_host_resume);
6882 #endif /* CONFIG_PM */
6883 EXPORT_SYMBOL_GPL(ata_id_string);
6884 EXPORT_SYMBOL_GPL(ata_id_c_string);
6885 EXPORT_SYMBOL_GPL(ata_do_dev_read_id);
6886 EXPORT_SYMBOL_GPL(ata_scsi_simulate);
6888 EXPORT_SYMBOL_GPL(ata_pio_need_iordy);
6889 EXPORT_SYMBOL_GPL(ata_timing_find_mode);
6890 EXPORT_SYMBOL_GPL(ata_timing_compute);
6891 EXPORT_SYMBOL_GPL(ata_timing_merge);
6892 EXPORT_SYMBOL_GPL(ata_timing_cycle2mode);
6895 EXPORT_SYMBOL_GPL(pci_test_config_bits);
6896 EXPORT_SYMBOL_GPL(ata_pci_remove_one);
6898 EXPORT_SYMBOL_GPL(ata_pci_device_do_suspend);
6899 EXPORT_SYMBOL_GPL(ata_pci_device_do_resume);
6900 EXPORT_SYMBOL_GPL(ata_pci_device_suspend);
6901 EXPORT_SYMBOL_GPL(ata_pci_device_resume);
6902 #endif /* CONFIG_PM */
6903 #endif /* CONFIG_PCI */
6905 EXPORT_SYMBOL_GPL(ata_platform_remove_one);
6907 EXPORT_SYMBOL_GPL(__ata_ehi_push_desc);
6908 EXPORT_SYMBOL_GPL(ata_ehi_push_desc);
6909 EXPORT_SYMBOL_GPL(ata_ehi_clear_desc);
6910 EXPORT_SYMBOL_GPL(ata_port_desc);
6912 EXPORT_SYMBOL_GPL(ata_port_pbar_desc);
6913 #endif /* CONFIG_PCI */
6914 EXPORT_SYMBOL_GPL(ata_port_schedule_eh);
6915 EXPORT_SYMBOL_GPL(ata_link_abort);
6916 EXPORT_SYMBOL_GPL(ata_port_abort);
6917 EXPORT_SYMBOL_GPL(ata_port_freeze);
6918 EXPORT_SYMBOL_GPL(sata_async_notification);
6919 EXPORT_SYMBOL_GPL(ata_eh_freeze_port);
6920 EXPORT_SYMBOL_GPL(ata_eh_thaw_port);
6921 EXPORT_SYMBOL_GPL(ata_eh_qc_complete);
6922 EXPORT_SYMBOL_GPL(ata_eh_qc_retry);
6923 EXPORT_SYMBOL_GPL(ata_eh_analyze_ncq_error);
6924 EXPORT_SYMBOL_GPL(ata_do_eh);
6925 EXPORT_SYMBOL_GPL(ata_std_error_handler);
6927 EXPORT_SYMBOL_GPL(ata_cable_40wire);
6928 EXPORT_SYMBOL_GPL(ata_cable_80wire);
6929 EXPORT_SYMBOL_GPL(ata_cable_unknown);
6930 EXPORT_SYMBOL_GPL(ata_cable_ignore);
6931 EXPORT_SYMBOL_GPL(ata_cable_sata);