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>
71 #include "libata-transport.h"
73 /* debounce timing parameters in msecs { interval, duration, timeout } */
74 const unsigned long sata_deb_timing_normal[] = { 5, 100, 2000 };
75 const unsigned long sata_deb_timing_hotplug[] = { 25, 500, 2000 };
76 const unsigned long sata_deb_timing_long[] = { 100, 2000, 5000 };
78 const struct ata_port_operations ata_base_port_ops = {
79 .prereset = ata_std_prereset,
80 .postreset = ata_std_postreset,
81 .error_handler = ata_std_error_handler,
84 const struct ata_port_operations sata_port_ops = {
85 .inherits = &ata_base_port_ops,
87 .qc_defer = ata_std_qc_defer,
88 .hardreset = sata_std_hardreset,
91 static unsigned int ata_dev_init_params(struct ata_device *dev,
92 u16 heads, u16 sectors);
93 static unsigned int ata_dev_set_xfermode(struct ata_device *dev);
94 static void ata_dev_xfermask(struct ata_device *dev);
95 static unsigned long ata_dev_blacklisted(const struct ata_device *dev);
97 unsigned int ata_print_id = 1;
99 struct ata_force_param {
103 unsigned long xfer_mask;
104 unsigned int horkage_on;
105 unsigned int horkage_off;
109 struct ata_force_ent {
112 struct ata_force_param param;
115 static struct ata_force_ent *ata_force_tbl;
116 static int ata_force_tbl_size;
118 static char ata_force_param_buf[PAGE_SIZE] __initdata;
119 /* param_buf is thrown away after initialization, disallow read */
120 module_param_string(force, ata_force_param_buf, sizeof(ata_force_param_buf), 0);
121 MODULE_PARM_DESC(force, "Force ATA configurations including cable type, link speed and transfer mode (see Documentation/kernel-parameters.txt for details)");
123 static int atapi_enabled = 1;
124 module_param(atapi_enabled, int, 0444);
125 MODULE_PARM_DESC(atapi_enabled, "Enable discovery of ATAPI devices (0=off, 1=on [default])");
127 static int atapi_dmadir = 0;
128 module_param(atapi_dmadir, int, 0444);
129 MODULE_PARM_DESC(atapi_dmadir, "Enable ATAPI DMADIR bridge support (0=off [default], 1=on)");
131 int atapi_passthru16 = 1;
132 module_param(atapi_passthru16, int, 0444);
133 MODULE_PARM_DESC(atapi_passthru16, "Enable ATA_16 passthru for ATAPI devices (0=off, 1=on [default])");
136 module_param_named(fua, libata_fua, int, 0444);
137 MODULE_PARM_DESC(fua, "FUA support (0=off [default], 1=on)");
139 static int ata_ignore_hpa;
140 module_param_named(ignore_hpa, ata_ignore_hpa, int, 0644);
141 MODULE_PARM_DESC(ignore_hpa, "Ignore HPA limit (0=keep BIOS limits, 1=ignore limits, using full disk)");
143 static int libata_dma_mask = ATA_DMA_MASK_ATA|ATA_DMA_MASK_ATAPI|ATA_DMA_MASK_CFA;
144 module_param_named(dma, libata_dma_mask, int, 0444);
145 MODULE_PARM_DESC(dma, "DMA enable/disable (0x1==ATA, 0x2==ATAPI, 0x4==CF)");
147 static int ata_probe_timeout;
148 module_param(ata_probe_timeout, int, 0444);
149 MODULE_PARM_DESC(ata_probe_timeout, "Set ATA probing timeout (seconds)");
151 int libata_noacpi = 0;
152 module_param_named(noacpi, libata_noacpi, int, 0444);
153 MODULE_PARM_DESC(noacpi, "Disable the use of ACPI in probe/suspend/resume (0=off [default], 1=on)");
155 int libata_allow_tpm = 0;
156 module_param_named(allow_tpm, libata_allow_tpm, int, 0444);
157 MODULE_PARM_DESC(allow_tpm, "Permit the use of TPM commands (0=off [default], 1=on)");
160 module_param(atapi_an, int, 0444);
161 MODULE_PARM_DESC(atapi_an, "Enable ATAPI AN media presence notification (0=0ff [default], 1=on)");
163 MODULE_AUTHOR("Jeff Garzik");
164 MODULE_DESCRIPTION("Library module for ATA devices");
165 MODULE_LICENSE("GPL");
166 MODULE_VERSION(DRV_VERSION);
169 static bool ata_sstatus_online(u32 sstatus)
171 return (sstatus & 0xf) == 0x3;
175 * ata_link_next - link iteration helper
176 * @link: the previous link, NULL to start
177 * @ap: ATA port containing links to iterate
178 * @mode: iteration mode, one of ATA_LITER_*
181 * Host lock or EH context.
184 * Pointer to the next link.
186 struct ata_link *ata_link_next(struct ata_link *link, struct ata_port *ap,
187 enum ata_link_iter_mode mode)
189 BUG_ON(mode != ATA_LITER_EDGE &&
190 mode != ATA_LITER_PMP_FIRST && mode != ATA_LITER_HOST_FIRST);
192 /* NULL link indicates start of iteration */
196 case ATA_LITER_PMP_FIRST:
197 if (sata_pmp_attached(ap))
200 case ATA_LITER_HOST_FIRST:
204 /* we just iterated over the host link, what's next? */
205 if (link == &ap->link)
207 case ATA_LITER_HOST_FIRST:
208 if (sata_pmp_attached(ap))
211 case ATA_LITER_PMP_FIRST:
212 if (unlikely(ap->slave_link))
213 return ap->slave_link;
219 /* slave_link excludes PMP */
220 if (unlikely(link == ap->slave_link))
223 /* we were over a PMP link */
224 if (++link < ap->pmp_link + ap->nr_pmp_links)
227 if (mode == ATA_LITER_PMP_FIRST)
234 * ata_dev_next - device iteration helper
235 * @dev: the previous device, NULL to start
236 * @link: ATA link containing devices to iterate
237 * @mode: iteration mode, one of ATA_DITER_*
240 * Host lock or EH context.
243 * Pointer to the next device.
245 struct ata_device *ata_dev_next(struct ata_device *dev, struct ata_link *link,
246 enum ata_dev_iter_mode mode)
248 BUG_ON(mode != ATA_DITER_ENABLED && mode != ATA_DITER_ENABLED_REVERSE &&
249 mode != ATA_DITER_ALL && mode != ATA_DITER_ALL_REVERSE);
251 /* NULL dev indicates start of iteration */
254 case ATA_DITER_ENABLED:
258 case ATA_DITER_ENABLED_REVERSE:
259 case ATA_DITER_ALL_REVERSE:
260 dev = link->device + ata_link_max_devices(link) - 1;
265 /* move to the next one */
267 case ATA_DITER_ENABLED:
269 if (++dev < link->device + ata_link_max_devices(link))
272 case ATA_DITER_ENABLED_REVERSE:
273 case ATA_DITER_ALL_REVERSE:
274 if (--dev >= link->device)
280 if ((mode == ATA_DITER_ENABLED || mode == ATA_DITER_ENABLED_REVERSE) &&
281 !ata_dev_enabled(dev))
287 * ata_dev_phys_link - find physical link for a device
288 * @dev: ATA device to look up physical link for
290 * Look up physical link which @dev is attached to. Note that
291 * this is different from @dev->link only when @dev is on slave
292 * link. For all other cases, it's the same as @dev->link.
298 * Pointer to the found physical link.
300 struct ata_link *ata_dev_phys_link(struct ata_device *dev)
302 struct ata_port *ap = dev->link->ap;
308 return ap->slave_link;
312 * ata_force_cbl - force cable type according to libata.force
313 * @ap: ATA port of interest
315 * Force cable type according to libata.force and whine about it.
316 * The last entry which has matching port number is used, so it
317 * can be specified as part of device force parameters. For
318 * example, both "a:40c,1.00:udma4" and "1.00:40c,udma4" have the
324 void ata_force_cbl(struct ata_port *ap)
328 for (i = ata_force_tbl_size - 1; i >= 0; i--) {
329 const struct ata_force_ent *fe = &ata_force_tbl[i];
331 if (fe->port != -1 && fe->port != ap->print_id)
334 if (fe->param.cbl == ATA_CBL_NONE)
337 ap->cbl = fe->param.cbl;
338 ata_port_notice(ap, "FORCE: cable set to %s\n", fe->param.name);
344 * ata_force_link_limits - force link limits according to libata.force
345 * @link: ATA link of interest
347 * Force link flags and SATA spd limit according to libata.force
348 * and whine about it. When only the port part is specified
349 * (e.g. 1:), the limit applies to all links connected to both
350 * the host link and all fan-out ports connected via PMP. If the
351 * device part is specified as 0 (e.g. 1.00:), it specifies the
352 * first fan-out link not the host link. Device number 15 always
353 * points to the host link whether PMP is attached or not. If the
354 * controller has slave link, device number 16 points to it.
359 static void ata_force_link_limits(struct ata_link *link)
361 bool did_spd = false;
362 int linkno = link->pmp;
365 if (ata_is_host_link(link))
368 for (i = ata_force_tbl_size - 1; i >= 0; i--) {
369 const struct ata_force_ent *fe = &ata_force_tbl[i];
371 if (fe->port != -1 && fe->port != link->ap->print_id)
374 if (fe->device != -1 && fe->device != linkno)
377 /* only honor the first spd limit */
378 if (!did_spd && fe->param.spd_limit) {
379 link->hw_sata_spd_limit = (1 << fe->param.spd_limit) - 1;
380 ata_link_notice(link, "FORCE: PHY spd limit set to %s\n",
385 /* let lflags stack */
386 if (fe->param.lflags) {
387 link->flags |= fe->param.lflags;
388 ata_link_notice(link,
389 "FORCE: link flag 0x%x forced -> 0x%x\n",
390 fe->param.lflags, link->flags);
396 * ata_force_xfermask - force xfermask according to libata.force
397 * @dev: ATA device of interest
399 * Force xfer_mask according to libata.force and whine about it.
400 * For consistency with link selection, device number 15 selects
401 * the first device connected to the host link.
406 static void ata_force_xfermask(struct ata_device *dev)
408 int devno = dev->link->pmp + dev->devno;
409 int alt_devno = devno;
412 /* allow n.15/16 for devices attached to host port */
413 if (ata_is_host_link(dev->link))
416 for (i = ata_force_tbl_size - 1; i >= 0; i--) {
417 const struct ata_force_ent *fe = &ata_force_tbl[i];
418 unsigned long pio_mask, mwdma_mask, udma_mask;
420 if (fe->port != -1 && fe->port != dev->link->ap->print_id)
423 if (fe->device != -1 && fe->device != devno &&
424 fe->device != alt_devno)
427 if (!fe->param.xfer_mask)
430 ata_unpack_xfermask(fe->param.xfer_mask,
431 &pio_mask, &mwdma_mask, &udma_mask);
433 dev->udma_mask = udma_mask;
434 else if (mwdma_mask) {
436 dev->mwdma_mask = mwdma_mask;
440 dev->pio_mask = pio_mask;
443 ata_dev_notice(dev, "FORCE: xfer_mask set to %s\n",
450 * ata_force_horkage - force horkage according to libata.force
451 * @dev: ATA device of interest
453 * Force horkage according to libata.force and whine about it.
454 * For consistency with link selection, device number 15 selects
455 * the first device connected to the host link.
460 static void ata_force_horkage(struct ata_device *dev)
462 int devno = dev->link->pmp + dev->devno;
463 int alt_devno = devno;
466 /* allow n.15/16 for devices attached to host port */
467 if (ata_is_host_link(dev->link))
470 for (i = 0; i < ata_force_tbl_size; i++) {
471 const struct ata_force_ent *fe = &ata_force_tbl[i];
473 if (fe->port != -1 && fe->port != dev->link->ap->print_id)
476 if (fe->device != -1 && fe->device != devno &&
477 fe->device != alt_devno)
480 if (!(~dev->horkage & fe->param.horkage_on) &&
481 !(dev->horkage & fe->param.horkage_off))
484 dev->horkage |= fe->param.horkage_on;
485 dev->horkage &= ~fe->param.horkage_off;
487 ata_dev_notice(dev, "FORCE: horkage modified (%s)\n",
493 * atapi_cmd_type - Determine ATAPI command type from SCSI opcode
494 * @opcode: SCSI opcode
496 * Determine ATAPI command type from @opcode.
502 * ATAPI_{READ|WRITE|READ_CD|PASS_THRU|MISC}
504 int atapi_cmd_type(u8 opcode)
513 case GPCMD_WRITE_AND_VERIFY_10:
517 case GPCMD_READ_CD_MSF:
518 return ATAPI_READ_CD;
522 if (atapi_passthru16)
523 return ATAPI_PASS_THRU;
531 * ata_tf_to_fis - Convert ATA taskfile to SATA FIS structure
532 * @tf: Taskfile to convert
533 * @pmp: Port multiplier port
534 * @is_cmd: This FIS is for command
535 * @fis: Buffer into which data will output
537 * Converts a standard ATA taskfile to a Serial ATA
538 * FIS structure (Register - Host to Device).
541 * Inherited from caller.
543 void ata_tf_to_fis(const struct ata_taskfile *tf, u8 pmp, int is_cmd, u8 *fis)
545 fis[0] = 0x27; /* Register - Host to Device FIS */
546 fis[1] = pmp & 0xf; /* Port multiplier number*/
548 fis[1] |= (1 << 7); /* bit 7 indicates Command FIS */
550 fis[2] = tf->command;
551 fis[3] = tf->feature;
558 fis[8] = tf->hob_lbal;
559 fis[9] = tf->hob_lbam;
560 fis[10] = tf->hob_lbah;
561 fis[11] = tf->hob_feature;
564 fis[13] = tf->hob_nsect;
575 * ata_tf_from_fis - Convert SATA FIS to ATA taskfile
576 * @fis: Buffer from which data will be input
577 * @tf: Taskfile to output
579 * Converts a serial ATA FIS structure to a standard ATA taskfile.
582 * Inherited from caller.
585 void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf)
587 tf->command = fis[2]; /* status */
588 tf->feature = fis[3]; /* error */
595 tf->hob_lbal = fis[8];
596 tf->hob_lbam = fis[9];
597 tf->hob_lbah = fis[10];
600 tf->hob_nsect = fis[13];
603 static const u8 ata_rw_cmds[] = {
607 ATA_CMD_READ_MULTI_EXT,
608 ATA_CMD_WRITE_MULTI_EXT,
612 ATA_CMD_WRITE_MULTI_FUA_EXT,
616 ATA_CMD_PIO_READ_EXT,
617 ATA_CMD_PIO_WRITE_EXT,
630 ATA_CMD_WRITE_FUA_EXT
634 * ata_rwcmd_protocol - set taskfile r/w commands and protocol
635 * @tf: command to examine and configure
636 * @dev: device tf belongs to
638 * Examine the device configuration and tf->flags to calculate
639 * the proper read/write commands and protocol to use.
644 static int ata_rwcmd_protocol(struct ata_taskfile *tf, struct ata_device *dev)
648 int index, fua, lba48, write;
650 fua = (tf->flags & ATA_TFLAG_FUA) ? 4 : 0;
651 lba48 = (tf->flags & ATA_TFLAG_LBA48) ? 2 : 0;
652 write = (tf->flags & ATA_TFLAG_WRITE) ? 1 : 0;
654 if (dev->flags & ATA_DFLAG_PIO) {
655 tf->protocol = ATA_PROT_PIO;
656 index = dev->multi_count ? 0 : 8;
657 } else if (lba48 && (dev->link->ap->flags & ATA_FLAG_PIO_LBA48)) {
658 /* Unable to use DMA due to host limitation */
659 tf->protocol = ATA_PROT_PIO;
660 index = dev->multi_count ? 0 : 8;
662 tf->protocol = ATA_PROT_DMA;
666 cmd = ata_rw_cmds[index + fua + lba48 + write];
675 * ata_tf_read_block - Read block address from ATA taskfile
676 * @tf: ATA taskfile of interest
677 * @dev: ATA device @tf belongs to
682 * Read block address from @tf. This function can handle all
683 * three address formats - LBA, LBA48 and CHS. tf->protocol and
684 * flags select the address format to use.
687 * Block address read from @tf.
689 u64 ata_tf_read_block(struct ata_taskfile *tf, struct ata_device *dev)
693 if (tf->flags & ATA_TFLAG_LBA) {
694 if (tf->flags & ATA_TFLAG_LBA48) {
695 block |= (u64)tf->hob_lbah << 40;
696 block |= (u64)tf->hob_lbam << 32;
697 block |= (u64)tf->hob_lbal << 24;
699 block |= (tf->device & 0xf) << 24;
701 block |= tf->lbah << 16;
702 block |= tf->lbam << 8;
707 cyl = tf->lbam | (tf->lbah << 8);
708 head = tf->device & 0xf;
713 "device reported invalid CHS sector 0\n");
714 sect = 1; /* oh well */
717 block = (cyl * dev->heads + head) * dev->sectors + sect - 1;
724 * ata_build_rw_tf - Build ATA taskfile for given read/write request
725 * @tf: Target ATA taskfile
726 * @dev: ATA device @tf belongs to
727 * @block: Block address
728 * @n_block: Number of blocks
729 * @tf_flags: RW/FUA etc...
735 * Build ATA taskfile @tf for read/write request described by
736 * @block, @n_block, @tf_flags and @tag on @dev.
740 * 0 on success, -ERANGE if the request is too large for @dev,
741 * -EINVAL if the request is invalid.
743 int ata_build_rw_tf(struct ata_taskfile *tf, struct ata_device *dev,
744 u64 block, u32 n_block, unsigned int tf_flags,
747 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
748 tf->flags |= tf_flags;
750 if (ata_ncq_enabled(dev) && likely(tag != ATA_TAG_INTERNAL)) {
752 if (!lba_48_ok(block, n_block))
755 tf->protocol = ATA_PROT_NCQ;
756 tf->flags |= ATA_TFLAG_LBA | ATA_TFLAG_LBA48;
758 if (tf->flags & ATA_TFLAG_WRITE)
759 tf->command = ATA_CMD_FPDMA_WRITE;
761 tf->command = ATA_CMD_FPDMA_READ;
763 tf->nsect = tag << 3;
764 tf->hob_feature = (n_block >> 8) & 0xff;
765 tf->feature = n_block & 0xff;
767 tf->hob_lbah = (block >> 40) & 0xff;
768 tf->hob_lbam = (block >> 32) & 0xff;
769 tf->hob_lbal = (block >> 24) & 0xff;
770 tf->lbah = (block >> 16) & 0xff;
771 tf->lbam = (block >> 8) & 0xff;
772 tf->lbal = block & 0xff;
775 if (tf->flags & ATA_TFLAG_FUA)
776 tf->device |= 1 << 7;
777 } else if (dev->flags & ATA_DFLAG_LBA) {
778 tf->flags |= ATA_TFLAG_LBA;
780 if (lba_28_ok(block, n_block)) {
782 tf->device |= (block >> 24) & 0xf;
783 } else if (lba_48_ok(block, n_block)) {
784 if (!(dev->flags & ATA_DFLAG_LBA48))
788 tf->flags |= ATA_TFLAG_LBA48;
790 tf->hob_nsect = (n_block >> 8) & 0xff;
792 tf->hob_lbah = (block >> 40) & 0xff;
793 tf->hob_lbam = (block >> 32) & 0xff;
794 tf->hob_lbal = (block >> 24) & 0xff;
796 /* request too large even for LBA48 */
799 if (unlikely(ata_rwcmd_protocol(tf, dev) < 0))
802 tf->nsect = n_block & 0xff;
804 tf->lbah = (block >> 16) & 0xff;
805 tf->lbam = (block >> 8) & 0xff;
806 tf->lbal = block & 0xff;
808 tf->device |= ATA_LBA;
811 u32 sect, head, cyl, track;
813 /* The request -may- be too large for CHS addressing. */
814 if (!lba_28_ok(block, n_block))
817 if (unlikely(ata_rwcmd_protocol(tf, dev) < 0))
820 /* Convert LBA to CHS */
821 track = (u32)block / dev->sectors;
822 cyl = track / dev->heads;
823 head = track % dev->heads;
824 sect = (u32)block % dev->sectors + 1;
826 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
827 (u32)block, track, cyl, head, sect);
829 /* Check whether the converted CHS can fit.
833 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
836 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
847 * ata_pack_xfermask - Pack pio, mwdma and udma masks into xfer_mask
848 * @pio_mask: pio_mask
849 * @mwdma_mask: mwdma_mask
850 * @udma_mask: udma_mask
852 * Pack @pio_mask, @mwdma_mask and @udma_mask into a single
853 * unsigned int xfer_mask.
861 unsigned long ata_pack_xfermask(unsigned long pio_mask,
862 unsigned long mwdma_mask,
863 unsigned long udma_mask)
865 return ((pio_mask << ATA_SHIFT_PIO) & ATA_MASK_PIO) |
866 ((mwdma_mask << ATA_SHIFT_MWDMA) & ATA_MASK_MWDMA) |
867 ((udma_mask << ATA_SHIFT_UDMA) & ATA_MASK_UDMA);
871 * ata_unpack_xfermask - Unpack xfer_mask into pio, mwdma and udma masks
872 * @xfer_mask: xfer_mask to unpack
873 * @pio_mask: resulting pio_mask
874 * @mwdma_mask: resulting mwdma_mask
875 * @udma_mask: resulting udma_mask
877 * Unpack @xfer_mask into @pio_mask, @mwdma_mask and @udma_mask.
878 * Any NULL distination masks will be ignored.
880 void ata_unpack_xfermask(unsigned long xfer_mask, unsigned long *pio_mask,
881 unsigned long *mwdma_mask, unsigned long *udma_mask)
884 *pio_mask = (xfer_mask & ATA_MASK_PIO) >> ATA_SHIFT_PIO;
886 *mwdma_mask = (xfer_mask & ATA_MASK_MWDMA) >> ATA_SHIFT_MWDMA;
888 *udma_mask = (xfer_mask & ATA_MASK_UDMA) >> ATA_SHIFT_UDMA;
891 static const struct ata_xfer_ent {
895 { ATA_SHIFT_PIO, ATA_NR_PIO_MODES, XFER_PIO_0 },
896 { ATA_SHIFT_MWDMA, ATA_NR_MWDMA_MODES, XFER_MW_DMA_0 },
897 { ATA_SHIFT_UDMA, ATA_NR_UDMA_MODES, XFER_UDMA_0 },
902 * ata_xfer_mask2mode - Find matching XFER_* for the given xfer_mask
903 * @xfer_mask: xfer_mask of interest
905 * Return matching XFER_* value for @xfer_mask. Only the highest
906 * bit of @xfer_mask is considered.
912 * Matching XFER_* value, 0xff if no match found.
914 u8 ata_xfer_mask2mode(unsigned long xfer_mask)
916 int highbit = fls(xfer_mask) - 1;
917 const struct ata_xfer_ent *ent;
919 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
920 if (highbit >= ent->shift && highbit < ent->shift + ent->bits)
921 return ent->base + highbit - ent->shift;
926 * ata_xfer_mode2mask - Find matching xfer_mask for XFER_*
927 * @xfer_mode: XFER_* of interest
929 * Return matching xfer_mask for @xfer_mode.
935 * Matching xfer_mask, 0 if no match found.
937 unsigned long ata_xfer_mode2mask(u8 xfer_mode)
939 const struct ata_xfer_ent *ent;
941 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
942 if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits)
943 return ((2 << (ent->shift + xfer_mode - ent->base)) - 1)
944 & ~((1 << ent->shift) - 1);
949 * ata_xfer_mode2shift - Find matching xfer_shift for XFER_*
950 * @xfer_mode: XFER_* of interest
952 * Return matching xfer_shift for @xfer_mode.
958 * Matching xfer_shift, -1 if no match found.
960 int ata_xfer_mode2shift(unsigned long xfer_mode)
962 const struct ata_xfer_ent *ent;
964 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
965 if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits)
971 * ata_mode_string - convert xfer_mask to string
972 * @xfer_mask: mask of bits supported; only highest bit counts.
974 * Determine string which represents the highest speed
975 * (highest bit in @modemask).
981 * Constant C string representing highest speed listed in
982 * @mode_mask, or the constant C string "<n/a>".
984 const char *ata_mode_string(unsigned long xfer_mask)
986 static const char * const xfer_mode_str[] = {
1010 highbit = fls(xfer_mask) - 1;
1011 if (highbit >= 0 && highbit < ARRAY_SIZE(xfer_mode_str))
1012 return xfer_mode_str[highbit];
1016 const char *sata_spd_string(unsigned int spd)
1018 static const char * const spd_str[] = {
1024 if (spd == 0 || (spd - 1) >= ARRAY_SIZE(spd_str))
1026 return spd_str[spd - 1];
1030 * ata_dev_classify - determine device type based on ATA-spec signature
1031 * @tf: ATA taskfile register set for device to be identified
1033 * Determine from taskfile register contents whether a device is
1034 * ATA or ATAPI, as per "Signature and persistence" section
1035 * of ATA/PI spec (volume 1, sect 5.14).
1041 * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, %ATA_DEV_PMP or
1042 * %ATA_DEV_UNKNOWN the event of failure.
1044 unsigned int ata_dev_classify(const struct ata_taskfile *tf)
1046 /* Apple's open source Darwin code hints that some devices only
1047 * put a proper signature into the LBA mid/high registers,
1048 * So, we only check those. It's sufficient for uniqueness.
1050 * ATA/ATAPI-7 (d1532v1r1: Feb. 19, 2003) specified separate
1051 * signatures for ATA and ATAPI devices attached on SerialATA,
1052 * 0x3c/0xc3 and 0x69/0x96 respectively. However, SerialATA
1053 * spec has never mentioned about using different signatures
1054 * for ATA/ATAPI devices. Then, Serial ATA II: Port
1055 * Multiplier specification began to use 0x69/0x96 to identify
1056 * port multpliers and 0x3c/0xc3 to identify SEMB device.
1057 * ATA/ATAPI-7 dropped descriptions about 0x3c/0xc3 and
1058 * 0x69/0x96 shortly and described them as reserved for
1061 * We follow the current spec and consider that 0x69/0x96
1062 * identifies a port multiplier and 0x3c/0xc3 a SEMB device.
1063 * Unfortunately, WDC WD1600JS-62MHB5 (a hard drive) reports
1064 * SEMB signature. This is worked around in
1065 * ata_dev_read_id().
1067 if ((tf->lbam == 0) && (tf->lbah == 0)) {
1068 DPRINTK("found ATA device by sig\n");
1072 if ((tf->lbam == 0x14) && (tf->lbah == 0xeb)) {
1073 DPRINTK("found ATAPI device by sig\n");
1074 return ATA_DEV_ATAPI;
1077 if ((tf->lbam == 0x69) && (tf->lbah == 0x96)) {
1078 DPRINTK("found PMP device by sig\n");
1082 if ((tf->lbam == 0x3c) && (tf->lbah == 0xc3)) {
1083 DPRINTK("found SEMB device by sig (could be ATA device)\n");
1084 return ATA_DEV_SEMB;
1087 DPRINTK("unknown device\n");
1088 return ATA_DEV_UNKNOWN;
1092 * ata_id_string - Convert IDENTIFY DEVICE page into string
1093 * @id: IDENTIFY DEVICE results we will examine
1094 * @s: string into which data is output
1095 * @ofs: offset into identify device page
1096 * @len: length of string to return. must be an even number.
1098 * The strings in the IDENTIFY DEVICE page are broken up into
1099 * 16-bit chunks. Run through the string, and output each
1100 * 8-bit chunk linearly, regardless of platform.
1106 void ata_id_string(const u16 *id, unsigned char *s,
1107 unsigned int ofs, unsigned int len)
1128 * ata_id_c_string - Convert IDENTIFY DEVICE page into C string
1129 * @id: IDENTIFY DEVICE results we will examine
1130 * @s: string into which data is output
1131 * @ofs: offset into identify device page
1132 * @len: length of string to return. must be an odd number.
1134 * This function is identical to ata_id_string except that it
1135 * trims trailing spaces and terminates the resulting string with
1136 * null. @len must be actual maximum length (even number) + 1.
1141 void ata_id_c_string(const u16 *id, unsigned char *s,
1142 unsigned int ofs, unsigned int len)
1146 ata_id_string(id, s, ofs, len - 1);
1148 p = s + strnlen(s, len - 1);
1149 while (p > s && p[-1] == ' ')
1154 static u64 ata_id_n_sectors(const u16 *id)
1156 if (ata_id_has_lba(id)) {
1157 if (ata_id_has_lba48(id))
1158 return ata_id_u64(id, ATA_ID_LBA_CAPACITY_2);
1160 return ata_id_u32(id, ATA_ID_LBA_CAPACITY);
1162 if (ata_id_current_chs_valid(id))
1163 return id[ATA_ID_CUR_CYLS] * id[ATA_ID_CUR_HEADS] *
1164 id[ATA_ID_CUR_SECTORS];
1166 return id[ATA_ID_CYLS] * id[ATA_ID_HEADS] *
1171 u64 ata_tf_to_lba48(const struct ata_taskfile *tf)
1175 sectors |= ((u64)(tf->hob_lbah & 0xff)) << 40;
1176 sectors |= ((u64)(tf->hob_lbam & 0xff)) << 32;
1177 sectors |= ((u64)(tf->hob_lbal & 0xff)) << 24;
1178 sectors |= (tf->lbah & 0xff) << 16;
1179 sectors |= (tf->lbam & 0xff) << 8;
1180 sectors |= (tf->lbal & 0xff);
1185 u64 ata_tf_to_lba(const struct ata_taskfile *tf)
1189 sectors |= (tf->device & 0x0f) << 24;
1190 sectors |= (tf->lbah & 0xff) << 16;
1191 sectors |= (tf->lbam & 0xff) << 8;
1192 sectors |= (tf->lbal & 0xff);
1198 * ata_read_native_max_address - Read native max address
1199 * @dev: target device
1200 * @max_sectors: out parameter for the result native max address
1202 * Perform an LBA48 or LBA28 native size query upon the device in
1206 * 0 on success, -EACCES if command is aborted by the drive.
1207 * -EIO on other errors.
1209 static int ata_read_native_max_address(struct ata_device *dev, u64 *max_sectors)
1211 unsigned int err_mask;
1212 struct ata_taskfile tf;
1213 int lba48 = ata_id_has_lba48(dev->id);
1215 ata_tf_init(dev, &tf);
1217 /* always clear all address registers */
1218 tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
1221 tf.command = ATA_CMD_READ_NATIVE_MAX_EXT;
1222 tf.flags |= ATA_TFLAG_LBA48;
1224 tf.command = ATA_CMD_READ_NATIVE_MAX;
1226 tf.protocol |= ATA_PROT_NODATA;
1227 tf.device |= ATA_LBA;
1229 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
1232 "failed to read native max address (err_mask=0x%x)\n",
1234 if (err_mask == AC_ERR_DEV && (tf.feature & ATA_ABORTED))
1240 *max_sectors = ata_tf_to_lba48(&tf) + 1;
1242 *max_sectors = ata_tf_to_lba(&tf) + 1;
1243 if (dev->horkage & ATA_HORKAGE_HPA_SIZE)
1249 * ata_set_max_sectors - Set max sectors
1250 * @dev: target device
1251 * @new_sectors: new max sectors value to set for the device
1253 * Set max sectors of @dev to @new_sectors.
1256 * 0 on success, -EACCES if command is aborted or denied (due to
1257 * previous non-volatile SET_MAX) by the drive. -EIO on other
1260 static int ata_set_max_sectors(struct ata_device *dev, u64 new_sectors)
1262 unsigned int err_mask;
1263 struct ata_taskfile tf;
1264 int lba48 = ata_id_has_lba48(dev->id);
1268 ata_tf_init(dev, &tf);
1270 tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
1273 tf.command = ATA_CMD_SET_MAX_EXT;
1274 tf.flags |= ATA_TFLAG_LBA48;
1276 tf.hob_lbal = (new_sectors >> 24) & 0xff;
1277 tf.hob_lbam = (new_sectors >> 32) & 0xff;
1278 tf.hob_lbah = (new_sectors >> 40) & 0xff;
1280 tf.command = ATA_CMD_SET_MAX;
1282 tf.device |= (new_sectors >> 24) & 0xf;
1285 tf.protocol |= ATA_PROT_NODATA;
1286 tf.device |= ATA_LBA;
1288 tf.lbal = (new_sectors >> 0) & 0xff;
1289 tf.lbam = (new_sectors >> 8) & 0xff;
1290 tf.lbah = (new_sectors >> 16) & 0xff;
1292 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
1295 "failed to set max address (err_mask=0x%x)\n",
1297 if (err_mask == AC_ERR_DEV &&
1298 (tf.feature & (ATA_ABORTED | ATA_IDNF)))
1307 * ata_hpa_resize - Resize a device with an HPA set
1308 * @dev: Device to resize
1310 * Read the size of an LBA28 or LBA48 disk with HPA features and resize
1311 * it if required to the full size of the media. The caller must check
1312 * the drive has the HPA feature set enabled.
1315 * 0 on success, -errno on failure.
1317 static int ata_hpa_resize(struct ata_device *dev)
1319 struct ata_eh_context *ehc = &dev->link->eh_context;
1320 int print_info = ehc->i.flags & ATA_EHI_PRINTINFO;
1321 bool unlock_hpa = ata_ignore_hpa || dev->flags & ATA_DFLAG_UNLOCK_HPA;
1322 u64 sectors = ata_id_n_sectors(dev->id);
1326 /* do we need to do it? */
1327 if (dev->class != ATA_DEV_ATA ||
1328 !ata_id_has_lba(dev->id) || !ata_id_hpa_enabled(dev->id) ||
1329 (dev->horkage & ATA_HORKAGE_BROKEN_HPA))
1332 /* read native max address */
1333 rc = ata_read_native_max_address(dev, &native_sectors);
1335 /* If device aborted the command or HPA isn't going to
1336 * be unlocked, skip HPA resizing.
1338 if (rc == -EACCES || !unlock_hpa) {
1340 "HPA support seems broken, skipping HPA handling\n");
1341 dev->horkage |= ATA_HORKAGE_BROKEN_HPA;
1343 /* we can continue if device aborted the command */
1350 dev->n_native_sectors = native_sectors;
1352 /* nothing to do? */
1353 if (native_sectors <= sectors || !unlock_hpa) {
1354 if (!print_info || native_sectors == sectors)
1357 if (native_sectors > sectors)
1359 "HPA detected: current %llu, native %llu\n",
1360 (unsigned long long)sectors,
1361 (unsigned long long)native_sectors);
1362 else if (native_sectors < sectors)
1364 "native sectors (%llu) is smaller than sectors (%llu)\n",
1365 (unsigned long long)native_sectors,
1366 (unsigned long long)sectors);
1370 /* let's unlock HPA */
1371 rc = ata_set_max_sectors(dev, native_sectors);
1372 if (rc == -EACCES) {
1373 /* if device aborted the command, skip HPA resizing */
1375 "device aborted resize (%llu -> %llu), skipping HPA handling\n",
1376 (unsigned long long)sectors,
1377 (unsigned long long)native_sectors);
1378 dev->horkage |= ATA_HORKAGE_BROKEN_HPA;
1383 /* re-read IDENTIFY data */
1384 rc = ata_dev_reread_id(dev, 0);
1387 "failed to re-read IDENTIFY data after HPA resizing\n");
1392 u64 new_sectors = ata_id_n_sectors(dev->id);
1394 "HPA unlocked: %llu -> %llu, native %llu\n",
1395 (unsigned long long)sectors,
1396 (unsigned long long)new_sectors,
1397 (unsigned long long)native_sectors);
1404 * ata_dump_id - IDENTIFY DEVICE info debugging output
1405 * @id: IDENTIFY DEVICE page to dump
1407 * Dump selected 16-bit words from the given IDENTIFY DEVICE
1414 static inline void ata_dump_id(const u16 *id)
1416 DPRINTK("49==0x%04x "
1426 DPRINTK("80==0x%04x "
1436 DPRINTK("88==0x%04x "
1443 * ata_id_xfermask - Compute xfermask from the given IDENTIFY data
1444 * @id: IDENTIFY data to compute xfer mask from
1446 * Compute the xfermask for this device. This is not as trivial
1447 * as it seems if we must consider early devices correctly.
1449 * FIXME: pre IDE drive timing (do we care ?).
1457 unsigned long ata_id_xfermask(const u16 *id)
1459 unsigned long pio_mask, mwdma_mask, udma_mask;
1461 /* Usual case. Word 53 indicates word 64 is valid */
1462 if (id[ATA_ID_FIELD_VALID] & (1 << 1)) {
1463 pio_mask = id[ATA_ID_PIO_MODES] & 0x03;
1467 /* If word 64 isn't valid then Word 51 high byte holds
1468 * the PIO timing number for the maximum. Turn it into
1471 u8 mode = (id[ATA_ID_OLD_PIO_MODES] >> 8) & 0xFF;
1472 if (mode < 5) /* Valid PIO range */
1473 pio_mask = (2 << mode) - 1;
1477 /* But wait.. there's more. Design your standards by
1478 * committee and you too can get a free iordy field to
1479 * process. However its the speeds not the modes that
1480 * are supported... Note drivers using the timing API
1481 * will get this right anyway
1485 mwdma_mask = id[ATA_ID_MWDMA_MODES] & 0x07;
1487 if (ata_id_is_cfa(id)) {
1489 * Process compact flash extended modes
1491 int pio = (id[ATA_ID_CFA_MODES] >> 0) & 0x7;
1492 int dma = (id[ATA_ID_CFA_MODES] >> 3) & 0x7;
1495 pio_mask |= (1 << 5);
1497 pio_mask |= (1 << 6);
1499 mwdma_mask |= (1 << 3);
1501 mwdma_mask |= (1 << 4);
1505 if (id[ATA_ID_FIELD_VALID] & (1 << 2))
1506 udma_mask = id[ATA_ID_UDMA_MODES] & 0xff;
1508 return ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask);
1511 static void ata_qc_complete_internal(struct ata_queued_cmd *qc)
1513 struct completion *waiting = qc->private_data;
1519 * ata_exec_internal_sg - execute libata internal command
1520 * @dev: Device to which the command is sent
1521 * @tf: Taskfile registers for the command and the result
1522 * @cdb: CDB for packet command
1523 * @dma_dir: Data tranfer direction of the command
1524 * @sgl: sg list for the data buffer of the command
1525 * @n_elem: Number of sg entries
1526 * @timeout: Timeout in msecs (0 for default)
1528 * Executes libata internal command with timeout. @tf contains
1529 * command on entry and result on return. Timeout and error
1530 * conditions are reported via return value. No recovery action
1531 * is taken after a command times out. It's caller's duty to
1532 * clean up after timeout.
1535 * None. Should be called with kernel context, might sleep.
1538 * Zero on success, AC_ERR_* mask on failure
1540 unsigned ata_exec_internal_sg(struct ata_device *dev,
1541 struct ata_taskfile *tf, const u8 *cdb,
1542 int dma_dir, struct scatterlist *sgl,
1543 unsigned int n_elem, unsigned long timeout)
1545 struct ata_link *link = dev->link;
1546 struct ata_port *ap = link->ap;
1547 u8 command = tf->command;
1548 int auto_timeout = 0;
1549 struct ata_queued_cmd *qc;
1550 unsigned int tag, preempted_tag;
1551 u32 preempted_sactive, preempted_qc_active;
1552 int preempted_nr_active_links;
1553 DECLARE_COMPLETION_ONSTACK(wait);
1554 unsigned long flags;
1555 unsigned int err_mask;
1558 spin_lock_irqsave(ap->lock, flags);
1560 /* no internal command while frozen */
1561 if (ap->pflags & ATA_PFLAG_FROZEN) {
1562 spin_unlock_irqrestore(ap->lock, flags);
1563 return AC_ERR_SYSTEM;
1566 /* initialize internal qc */
1568 /* XXX: Tag 0 is used for drivers with legacy EH as some
1569 * drivers choke if any other tag is given. This breaks
1570 * ata_tag_internal() test for those drivers. Don't use new
1571 * EH stuff without converting to it.
1573 if (ap->ops->error_handler)
1574 tag = ATA_TAG_INTERNAL;
1578 if (test_and_set_bit(tag, &ap->qc_allocated))
1580 qc = __ata_qc_from_tag(ap, tag);
1588 preempted_tag = link->active_tag;
1589 preempted_sactive = link->sactive;
1590 preempted_qc_active = ap->qc_active;
1591 preempted_nr_active_links = ap->nr_active_links;
1592 link->active_tag = ATA_TAG_POISON;
1595 ap->nr_active_links = 0;
1597 /* prepare & issue qc */
1600 memcpy(qc->cdb, cdb, ATAPI_CDB_LEN);
1601 qc->flags |= ATA_QCFLAG_RESULT_TF;
1602 qc->dma_dir = dma_dir;
1603 if (dma_dir != DMA_NONE) {
1604 unsigned int i, buflen = 0;
1605 struct scatterlist *sg;
1607 for_each_sg(sgl, sg, n_elem, i)
1608 buflen += sg->length;
1610 ata_sg_init(qc, sgl, n_elem);
1611 qc->nbytes = buflen;
1614 qc->private_data = &wait;
1615 qc->complete_fn = ata_qc_complete_internal;
1619 spin_unlock_irqrestore(ap->lock, flags);
1622 if (ata_probe_timeout)
1623 timeout = ata_probe_timeout * 1000;
1625 timeout = ata_internal_cmd_timeout(dev, command);
1630 if (ap->ops->error_handler)
1633 rc = wait_for_completion_timeout(&wait, msecs_to_jiffies(timeout));
1635 if (ap->ops->error_handler)
1638 ata_sff_flush_pio_task(ap);
1641 spin_lock_irqsave(ap->lock, flags);
1643 /* We're racing with irq here. If we lose, the
1644 * following test prevents us from completing the qc
1645 * twice. If we win, the port is frozen and will be
1646 * cleaned up by ->post_internal_cmd().
1648 if (qc->flags & ATA_QCFLAG_ACTIVE) {
1649 qc->err_mask |= AC_ERR_TIMEOUT;
1651 if (ap->ops->error_handler)
1652 ata_port_freeze(ap);
1654 ata_qc_complete(qc);
1656 if (ata_msg_warn(ap))
1657 ata_dev_warn(dev, "qc timeout (cmd 0x%x)\n",
1661 spin_unlock_irqrestore(ap->lock, flags);
1664 /* do post_internal_cmd */
1665 if (ap->ops->post_internal_cmd)
1666 ap->ops->post_internal_cmd(qc);
1668 /* perform minimal error analysis */
1669 if (qc->flags & ATA_QCFLAG_FAILED) {
1670 if (qc->result_tf.command & (ATA_ERR | ATA_DF))
1671 qc->err_mask |= AC_ERR_DEV;
1674 qc->err_mask |= AC_ERR_OTHER;
1676 if (qc->err_mask & ~AC_ERR_OTHER)
1677 qc->err_mask &= ~AC_ERR_OTHER;
1681 spin_lock_irqsave(ap->lock, flags);
1683 *tf = qc->result_tf;
1684 err_mask = qc->err_mask;
1687 link->active_tag = preempted_tag;
1688 link->sactive = preempted_sactive;
1689 ap->qc_active = preempted_qc_active;
1690 ap->nr_active_links = preempted_nr_active_links;
1692 spin_unlock_irqrestore(ap->lock, flags);
1694 if ((err_mask & AC_ERR_TIMEOUT) && auto_timeout)
1695 ata_internal_cmd_timed_out(dev, command);
1701 * ata_exec_internal - execute libata internal command
1702 * @dev: Device to which the command is sent
1703 * @tf: Taskfile registers for the command and the result
1704 * @cdb: CDB for packet command
1705 * @dma_dir: Data tranfer direction of the command
1706 * @buf: Data buffer of the command
1707 * @buflen: Length of data buffer
1708 * @timeout: Timeout in msecs (0 for default)
1710 * Wrapper around ata_exec_internal_sg() which takes simple
1711 * buffer instead of sg list.
1714 * None. Should be called with kernel context, might sleep.
1717 * Zero on success, AC_ERR_* mask on failure
1719 unsigned ata_exec_internal(struct ata_device *dev,
1720 struct ata_taskfile *tf, const u8 *cdb,
1721 int dma_dir, void *buf, unsigned int buflen,
1722 unsigned long timeout)
1724 struct scatterlist *psg = NULL, sg;
1725 unsigned int n_elem = 0;
1727 if (dma_dir != DMA_NONE) {
1729 sg_init_one(&sg, buf, buflen);
1734 return ata_exec_internal_sg(dev, tf, cdb, dma_dir, psg, n_elem,
1739 * ata_do_simple_cmd - execute simple internal command
1740 * @dev: Device to which the command is sent
1741 * @cmd: Opcode to execute
1743 * Execute a 'simple' command, that only consists of the opcode
1744 * 'cmd' itself, without filling any other registers
1747 * Kernel thread context (may sleep).
1750 * Zero on success, AC_ERR_* mask on failure
1752 unsigned int ata_do_simple_cmd(struct ata_device *dev, u8 cmd)
1754 struct ata_taskfile tf;
1756 ata_tf_init(dev, &tf);
1759 tf.flags |= ATA_TFLAG_DEVICE;
1760 tf.protocol = ATA_PROT_NODATA;
1762 return ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
1766 * ata_pio_need_iordy - check if iordy needed
1769 * Check if the current speed of the device requires IORDY. Used
1770 * by various controllers for chip configuration.
1772 unsigned int ata_pio_need_iordy(const struct ata_device *adev)
1774 /* Don't set IORDY if we're preparing for reset. IORDY may
1775 * lead to controller lock up on certain controllers if the
1776 * port is not occupied. See bko#11703 for details.
1778 if (adev->link->ap->pflags & ATA_PFLAG_RESETTING)
1780 /* Controller doesn't support IORDY. Probably a pointless
1781 * check as the caller should know this.
1783 if (adev->link->ap->flags & ATA_FLAG_NO_IORDY)
1785 /* CF spec. r4.1 Table 22 says no iordy on PIO5 and PIO6. */
1786 if (ata_id_is_cfa(adev->id)
1787 && (adev->pio_mode == XFER_PIO_5 || adev->pio_mode == XFER_PIO_6))
1789 /* PIO3 and higher it is mandatory */
1790 if (adev->pio_mode > XFER_PIO_2)
1792 /* We turn it on when possible */
1793 if (ata_id_has_iordy(adev->id))
1799 * ata_pio_mask_no_iordy - Return the non IORDY mask
1802 * Compute the highest mode possible if we are not using iordy. Return
1803 * -1 if no iordy mode is available.
1805 static u32 ata_pio_mask_no_iordy(const struct ata_device *adev)
1807 /* If we have no drive specific rule, then PIO 2 is non IORDY */
1808 if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE */
1809 u16 pio = adev->id[ATA_ID_EIDE_PIO];
1810 /* Is the speed faster than the drive allows non IORDY ? */
1812 /* This is cycle times not frequency - watch the logic! */
1813 if (pio > 240) /* PIO2 is 240nS per cycle */
1814 return 3 << ATA_SHIFT_PIO;
1815 return 7 << ATA_SHIFT_PIO;
1818 return 3 << ATA_SHIFT_PIO;
1822 * ata_do_dev_read_id - default ID read method
1824 * @tf: proposed taskfile
1827 * Issue the identify taskfile and hand back the buffer containing
1828 * identify data. For some RAID controllers and for pre ATA devices
1829 * this function is wrapped or replaced by the driver
1831 unsigned int ata_do_dev_read_id(struct ata_device *dev,
1832 struct ata_taskfile *tf, u16 *id)
1834 return ata_exec_internal(dev, tf, NULL, DMA_FROM_DEVICE,
1835 id, sizeof(id[0]) * ATA_ID_WORDS, 0);
1839 * ata_dev_read_id - Read ID data from the specified device
1840 * @dev: target device
1841 * @p_class: pointer to class of the target device (may be changed)
1842 * @flags: ATA_READID_* flags
1843 * @id: buffer to read IDENTIFY data into
1845 * Read ID data from the specified device. ATA_CMD_ID_ATA is
1846 * performed on ATA devices and ATA_CMD_ID_ATAPI on ATAPI
1847 * devices. This function also issues ATA_CMD_INIT_DEV_PARAMS
1848 * for pre-ATA4 drives.
1850 * FIXME: ATA_CMD_ID_ATA is optional for early drives and right
1851 * now we abort if we hit that case.
1854 * Kernel thread context (may sleep)
1857 * 0 on success, -errno otherwise.
1859 int ata_dev_read_id(struct ata_device *dev, unsigned int *p_class,
1860 unsigned int flags, u16 *id)
1862 struct ata_port *ap = dev->link->ap;
1863 unsigned int class = *p_class;
1864 struct ata_taskfile tf;
1865 unsigned int err_mask = 0;
1867 bool is_semb = class == ATA_DEV_SEMB;
1868 int may_fallback = 1, tried_spinup = 0;
1871 if (ata_msg_ctl(ap))
1872 ata_dev_dbg(dev, "%s: ENTER\n", __func__);
1875 ata_tf_init(dev, &tf);
1879 class = ATA_DEV_ATA; /* some hard drives report SEMB sig */
1881 tf.command = ATA_CMD_ID_ATA;
1884 tf.command = ATA_CMD_ID_ATAPI;
1888 reason = "unsupported class";
1892 tf.protocol = ATA_PROT_PIO;
1894 /* Some devices choke if TF registers contain garbage. Make
1895 * sure those are properly initialized.
1897 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
1899 /* Device presence detection is unreliable on some
1900 * controllers. Always poll IDENTIFY if available.
1902 tf.flags |= ATA_TFLAG_POLLING;
1904 if (ap->ops->read_id)
1905 err_mask = ap->ops->read_id(dev, &tf, id);
1907 err_mask = ata_do_dev_read_id(dev, &tf, id);
1910 if (err_mask & AC_ERR_NODEV_HINT) {
1911 ata_dev_dbg(dev, "NODEV after polling detection\n");
1917 "IDENTIFY failed on device w/ SEMB sig, disabled\n");
1918 /* SEMB is not supported yet */
1919 *p_class = ATA_DEV_SEMB_UNSUP;
1923 if ((err_mask == AC_ERR_DEV) && (tf.feature & ATA_ABORTED)) {
1924 /* Device or controller might have reported
1925 * the wrong device class. Give a shot at the
1926 * other IDENTIFY if the current one is
1927 * aborted by the device.
1932 if (class == ATA_DEV_ATA)
1933 class = ATA_DEV_ATAPI;
1935 class = ATA_DEV_ATA;
1939 /* Control reaches here iff the device aborted
1940 * both flavors of IDENTIFYs which happens
1941 * sometimes with phantom devices.
1944 "both IDENTIFYs aborted, assuming NODEV\n");
1949 reason = "I/O error";
1953 if (dev->horkage & ATA_HORKAGE_DUMP_ID) {
1954 ata_dev_dbg(dev, "dumping IDENTIFY data, "
1955 "class=%d may_fallback=%d tried_spinup=%d\n",
1956 class, may_fallback, tried_spinup);
1957 print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET,
1958 16, 2, id, ATA_ID_WORDS * sizeof(*id), true);
1961 /* Falling back doesn't make sense if ID data was read
1962 * successfully at least once.
1966 swap_buf_le16(id, ATA_ID_WORDS);
1970 reason = "device reports invalid type";
1972 if (class == ATA_DEV_ATA) {
1973 if (!ata_id_is_ata(id) && !ata_id_is_cfa(id))
1976 if (ata_id_is_ata(id))
1980 if (!tried_spinup && (id[2] == 0x37c8 || id[2] == 0x738c)) {
1983 * Drive powered-up in standby mode, and requires a specific
1984 * SET_FEATURES spin-up subcommand before it will accept
1985 * anything other than the original IDENTIFY command.
1987 err_mask = ata_dev_set_feature(dev, SETFEATURES_SPINUP, 0);
1988 if (err_mask && id[2] != 0x738c) {
1990 reason = "SPINUP failed";
1994 * If the drive initially returned incomplete IDENTIFY info,
1995 * we now must reissue the IDENTIFY command.
1997 if (id[2] == 0x37c8)
2001 if ((flags & ATA_READID_POSTRESET) && class == ATA_DEV_ATA) {
2003 * The exact sequence expected by certain pre-ATA4 drives is:
2005 * IDENTIFY (optional in early ATA)
2006 * INITIALIZE DEVICE PARAMETERS (later IDE and ATA)
2008 * Some drives were very specific about that exact sequence.
2010 * Note that ATA4 says lba is mandatory so the second check
2011 * should never trigger.
2013 if (ata_id_major_version(id) < 4 || !ata_id_has_lba(id)) {
2014 err_mask = ata_dev_init_params(dev, id[3], id[6]);
2017 reason = "INIT_DEV_PARAMS failed";
2021 /* current CHS translation info (id[53-58]) might be
2022 * changed. reread the identify device info.
2024 flags &= ~ATA_READID_POSTRESET;
2034 if (ata_msg_warn(ap))
2035 ata_dev_warn(dev, "failed to IDENTIFY (%s, err_mask=0x%x)\n",
2040 static int ata_do_link_spd_horkage(struct ata_device *dev)
2042 struct ata_link *plink = ata_dev_phys_link(dev);
2043 u32 target, target_limit;
2045 if (!sata_scr_valid(plink))
2048 if (dev->horkage & ATA_HORKAGE_1_5_GBPS)
2053 target_limit = (1 << target) - 1;
2055 /* if already on stricter limit, no need to push further */
2056 if (plink->sata_spd_limit <= target_limit)
2059 plink->sata_spd_limit = target_limit;
2061 /* Request another EH round by returning -EAGAIN if link is
2062 * going faster than the target speed. Forward progress is
2063 * guaranteed by setting sata_spd_limit to target_limit above.
2065 if (plink->sata_spd > target) {
2066 ata_dev_info(dev, "applying link speed limit horkage to %s\n",
2067 sata_spd_string(target));
2073 static inline u8 ata_dev_knobble(struct ata_device *dev)
2075 struct ata_port *ap = dev->link->ap;
2077 if (ata_dev_blacklisted(dev) & ATA_HORKAGE_BRIDGE_OK)
2080 return ((ap->cbl == ATA_CBL_SATA) && (!ata_id_is_sata(dev->id)));
2083 static int ata_dev_config_ncq(struct ata_device *dev,
2084 char *desc, size_t desc_sz)
2086 struct ata_port *ap = dev->link->ap;
2087 int hdepth = 0, ddepth = ata_id_queue_depth(dev->id);
2088 unsigned int err_mask;
2091 if (!ata_id_has_ncq(dev->id)) {
2095 if (dev->horkage & ATA_HORKAGE_NONCQ) {
2096 snprintf(desc, desc_sz, "NCQ (not used)");
2099 if (ap->flags & ATA_FLAG_NCQ) {
2100 hdepth = min(ap->scsi_host->can_queue, ATA_MAX_QUEUE - 1);
2101 dev->flags |= ATA_DFLAG_NCQ;
2104 if (!(dev->horkage & ATA_HORKAGE_BROKEN_FPDMA_AA) &&
2105 (ap->flags & ATA_FLAG_FPDMA_AA) &&
2106 ata_id_has_fpdma_aa(dev->id)) {
2107 err_mask = ata_dev_set_feature(dev, SETFEATURES_SATA_ENABLE,
2111 "failed to enable AA (error_mask=0x%x)\n",
2113 if (err_mask != AC_ERR_DEV) {
2114 dev->horkage |= ATA_HORKAGE_BROKEN_FPDMA_AA;
2121 if (hdepth >= ddepth)
2122 snprintf(desc, desc_sz, "NCQ (depth %d)%s", ddepth, aa_desc);
2124 snprintf(desc, desc_sz, "NCQ (depth %d/%d)%s", hdepth,
2130 * ata_dev_configure - Configure the specified ATA/ATAPI device
2131 * @dev: Target device to configure
2133 * Configure @dev according to @dev->id. Generic and low-level
2134 * driver specific fixups are also applied.
2137 * Kernel thread context (may sleep)
2140 * 0 on success, -errno otherwise
2142 int ata_dev_configure(struct ata_device *dev)
2144 struct ata_port *ap = dev->link->ap;
2145 struct ata_eh_context *ehc = &dev->link->eh_context;
2146 int print_info = ehc->i.flags & ATA_EHI_PRINTINFO;
2147 const u16 *id = dev->id;
2148 unsigned long xfer_mask;
2149 char revbuf[7]; /* XYZ-99\0 */
2150 char fwrevbuf[ATA_ID_FW_REV_LEN+1];
2151 char modelbuf[ATA_ID_PROD_LEN+1];
2154 if (!ata_dev_enabled(dev) && ata_msg_info(ap)) {
2155 ata_dev_info(dev, "%s: ENTER/EXIT -- nodev\n", __func__);
2159 if (ata_msg_probe(ap))
2160 ata_dev_dbg(dev, "%s: ENTER\n", __func__);
2163 dev->horkage |= ata_dev_blacklisted(dev);
2164 ata_force_horkage(dev);
2166 if (dev->horkage & ATA_HORKAGE_DISABLE) {
2167 ata_dev_info(dev, "unsupported device, disabling\n");
2168 ata_dev_disable(dev);
2172 if ((!atapi_enabled || (ap->flags & ATA_FLAG_NO_ATAPI)) &&
2173 dev->class == ATA_DEV_ATAPI) {
2174 ata_dev_warn(dev, "WARNING: ATAPI is %s, device ignored\n",
2175 atapi_enabled ? "not supported with this driver"
2177 ata_dev_disable(dev);
2181 rc = ata_do_link_spd_horkage(dev);
2185 /* let ACPI work its magic */
2186 rc = ata_acpi_on_devcfg(dev);
2190 /* massage HPA, do it early as it might change IDENTIFY data */
2191 rc = ata_hpa_resize(dev);
2195 /* print device capabilities */
2196 if (ata_msg_probe(ap))
2198 "%s: cfg 49:%04x 82:%04x 83:%04x 84:%04x "
2199 "85:%04x 86:%04x 87:%04x 88:%04x\n",
2201 id[49], id[82], id[83], id[84],
2202 id[85], id[86], id[87], id[88]);
2204 /* initialize to-be-configured parameters */
2205 dev->flags &= ~ATA_DFLAG_CFG_MASK;
2206 dev->max_sectors = 0;
2212 dev->multi_count = 0;
2215 * common ATA, ATAPI feature tests
2218 /* find max transfer mode; for printk only */
2219 xfer_mask = ata_id_xfermask(id);
2221 if (ata_msg_probe(ap))
2224 /* SCSI only uses 4-char revisions, dump full 8 chars from ATA */
2225 ata_id_c_string(dev->id, fwrevbuf, ATA_ID_FW_REV,
2228 ata_id_c_string(dev->id, modelbuf, ATA_ID_PROD,
2231 /* ATA-specific feature tests */
2232 if (dev->class == ATA_DEV_ATA) {
2233 if (ata_id_is_cfa(id)) {
2234 /* CPRM may make this media unusable */
2235 if (id[ATA_ID_CFA_KEY_MGMT] & 1)
2237 "supports DRM functions and may not be fully accessible\n");
2238 snprintf(revbuf, 7, "CFA");
2240 snprintf(revbuf, 7, "ATA-%d", ata_id_major_version(id));
2241 /* Warn the user if the device has TPM extensions */
2242 if (ata_id_has_tpm(id))
2244 "supports DRM functions and may not be fully accessible\n");
2247 dev->n_sectors = ata_id_n_sectors(id);
2249 /* get current R/W Multiple count setting */
2250 if ((dev->id[47] >> 8) == 0x80 && (dev->id[59] & 0x100)) {
2251 unsigned int max = dev->id[47] & 0xff;
2252 unsigned int cnt = dev->id[59] & 0xff;
2253 /* only recognize/allow powers of two here */
2254 if (is_power_of_2(max) && is_power_of_2(cnt))
2256 dev->multi_count = cnt;
2259 if (ata_id_has_lba(id)) {
2260 const char *lba_desc;
2264 dev->flags |= ATA_DFLAG_LBA;
2265 if (ata_id_has_lba48(id)) {
2266 dev->flags |= ATA_DFLAG_LBA48;
2269 if (dev->n_sectors >= (1UL << 28) &&
2270 ata_id_has_flush_ext(id))
2271 dev->flags |= ATA_DFLAG_FLUSH_EXT;
2275 rc = ata_dev_config_ncq(dev, ncq_desc, sizeof(ncq_desc));
2279 /* print device info to dmesg */
2280 if (ata_msg_drv(ap) && print_info) {
2281 ata_dev_info(dev, "%s: %s, %s, max %s\n",
2282 revbuf, modelbuf, fwrevbuf,
2283 ata_mode_string(xfer_mask));
2285 "%llu sectors, multi %u: %s %s\n",
2286 (unsigned long long)dev->n_sectors,
2287 dev->multi_count, lba_desc, ncq_desc);
2292 /* Default translation */
2293 dev->cylinders = id[1];
2295 dev->sectors = id[6];
2297 if (ata_id_current_chs_valid(id)) {
2298 /* Current CHS translation is valid. */
2299 dev->cylinders = id[54];
2300 dev->heads = id[55];
2301 dev->sectors = id[56];
2304 /* print device info to dmesg */
2305 if (ata_msg_drv(ap) && print_info) {
2306 ata_dev_info(dev, "%s: %s, %s, max %s\n",
2307 revbuf, modelbuf, fwrevbuf,
2308 ata_mode_string(xfer_mask));
2310 "%llu sectors, multi %u, CHS %u/%u/%u\n",
2311 (unsigned long long)dev->n_sectors,
2312 dev->multi_count, dev->cylinders,
2313 dev->heads, dev->sectors);
2320 /* ATAPI-specific feature tests */
2321 else if (dev->class == ATA_DEV_ATAPI) {
2322 const char *cdb_intr_string = "";
2323 const char *atapi_an_string = "";
2324 const char *dma_dir_string = "";
2327 rc = atapi_cdb_len(id);
2328 if ((rc < 12) || (rc > ATAPI_CDB_LEN)) {
2329 if (ata_msg_warn(ap))
2330 ata_dev_warn(dev, "unsupported CDB len\n");
2334 dev->cdb_len = (unsigned int) rc;
2336 /* Enable ATAPI AN if both the host and device have
2337 * the support. If PMP is attached, SNTF is required
2338 * to enable ATAPI AN to discern between PHY status
2339 * changed notifications and ATAPI ANs.
2342 (ap->flags & ATA_FLAG_AN) && ata_id_has_atapi_AN(id) &&
2343 (!sata_pmp_attached(ap) ||
2344 sata_scr_read(&ap->link, SCR_NOTIFICATION, &sntf) == 0)) {
2345 unsigned int err_mask;
2347 /* issue SET feature command to turn this on */
2348 err_mask = ata_dev_set_feature(dev,
2349 SETFEATURES_SATA_ENABLE, SATA_AN);
2352 "failed to enable ATAPI AN (err_mask=0x%x)\n",
2355 dev->flags |= ATA_DFLAG_AN;
2356 atapi_an_string = ", ATAPI AN";
2360 if (ata_id_cdb_intr(dev->id)) {
2361 dev->flags |= ATA_DFLAG_CDB_INTR;
2362 cdb_intr_string = ", CDB intr";
2365 if (atapi_dmadir || atapi_id_dmadir(dev->id)) {
2366 dev->flags |= ATA_DFLAG_DMADIR;
2367 dma_dir_string = ", DMADIR";
2370 /* print device info to dmesg */
2371 if (ata_msg_drv(ap) && print_info)
2373 "ATAPI: %s, %s, max %s%s%s%s\n",
2375 ata_mode_string(xfer_mask),
2376 cdb_intr_string, atapi_an_string,
2380 /* determine max_sectors */
2381 dev->max_sectors = ATA_MAX_SECTORS;
2382 if (dev->flags & ATA_DFLAG_LBA48)
2383 dev->max_sectors = ATA_MAX_SECTORS_LBA48;
2385 /* Limit PATA drive on SATA cable bridge transfers to udma5,
2387 if (ata_dev_knobble(dev)) {
2388 if (ata_msg_drv(ap) && print_info)
2389 ata_dev_info(dev, "applying bridge limits\n");
2390 dev->udma_mask &= ATA_UDMA5;
2391 dev->max_sectors = ATA_MAX_SECTORS;
2394 if ((dev->class == ATA_DEV_ATAPI) &&
2395 (atapi_command_packet_set(id) == TYPE_TAPE)) {
2396 dev->max_sectors = ATA_MAX_SECTORS_TAPE;
2397 dev->horkage |= ATA_HORKAGE_STUCK_ERR;
2400 if (dev->horkage & ATA_HORKAGE_MAX_SEC_128)
2401 dev->max_sectors = min_t(unsigned int, ATA_MAX_SECTORS_128,
2404 if (dev->horkage & ATA_HORKAGE_MAX_SEC_LBA48)
2405 dev->max_sectors = ATA_MAX_SECTORS_LBA48;
2407 if (ap->ops->dev_config)
2408 ap->ops->dev_config(dev);
2410 if (dev->horkage & ATA_HORKAGE_DIAGNOSTIC) {
2411 /* Let the user know. We don't want to disallow opens for
2412 rescue purposes, or in case the vendor is just a blithering
2413 idiot. Do this after the dev_config call as some controllers
2414 with buggy firmware may want to avoid reporting false device
2419 "Drive reports diagnostics failure. This may indicate a drive\n");
2421 "fault or invalid emulation. Contact drive vendor for information.\n");
2425 if ((dev->horkage & ATA_HORKAGE_FIRMWARE_WARN) && print_info) {
2426 ata_dev_warn(dev, "WARNING: device requires firmware update to be fully functional\n");
2427 ata_dev_warn(dev, " contact the vendor or visit http://ata.wiki.kernel.org\n");
2433 if (ata_msg_probe(ap))
2434 ata_dev_dbg(dev, "%s: EXIT, err\n", __func__);
2439 * ata_cable_40wire - return 40 wire cable type
2442 * Helper method for drivers which want to hardwire 40 wire cable
2446 int ata_cable_40wire(struct ata_port *ap)
2448 return ATA_CBL_PATA40;
2452 * ata_cable_80wire - return 80 wire cable type
2455 * Helper method for drivers which want to hardwire 80 wire cable
2459 int ata_cable_80wire(struct ata_port *ap)
2461 return ATA_CBL_PATA80;
2465 * ata_cable_unknown - return unknown PATA cable.
2468 * Helper method for drivers which have no PATA cable detection.
2471 int ata_cable_unknown(struct ata_port *ap)
2473 return ATA_CBL_PATA_UNK;
2477 * ata_cable_ignore - return ignored PATA cable.
2480 * Helper method for drivers which don't use cable type to limit
2483 int ata_cable_ignore(struct ata_port *ap)
2485 return ATA_CBL_PATA_IGN;
2489 * ata_cable_sata - return SATA cable type
2492 * Helper method for drivers which have SATA cables
2495 int ata_cable_sata(struct ata_port *ap)
2497 return ATA_CBL_SATA;
2501 * ata_bus_probe - Reset and probe ATA bus
2504 * Master ATA bus probing function. Initiates a hardware-dependent
2505 * bus reset, then attempts to identify any devices found on
2509 * PCI/etc. bus probe sem.
2512 * Zero on success, negative errno otherwise.
2515 int ata_bus_probe(struct ata_port *ap)
2517 unsigned int classes[ATA_MAX_DEVICES];
2518 int tries[ATA_MAX_DEVICES];
2520 struct ata_device *dev;
2522 ata_for_each_dev(dev, &ap->link, ALL)
2523 tries[dev->devno] = ATA_PROBE_MAX_TRIES;
2526 ata_for_each_dev(dev, &ap->link, ALL) {
2527 /* If we issue an SRST then an ATA drive (not ATAPI)
2528 * may change configuration and be in PIO0 timing. If
2529 * we do a hard reset (or are coming from power on)
2530 * this is true for ATA or ATAPI. Until we've set a
2531 * suitable controller mode we should not touch the
2532 * bus as we may be talking too fast.
2534 dev->pio_mode = XFER_PIO_0;
2535 dev->dma_mode = 0xff;
2537 /* If the controller has a pio mode setup function
2538 * then use it to set the chipset to rights. Don't
2539 * touch the DMA setup as that will be dealt with when
2540 * configuring devices.
2542 if (ap->ops->set_piomode)
2543 ap->ops->set_piomode(ap, dev);
2546 /* reset and determine device classes */
2547 ap->ops->phy_reset(ap);
2549 ata_for_each_dev(dev, &ap->link, ALL) {
2550 if (dev->class != ATA_DEV_UNKNOWN)
2551 classes[dev->devno] = dev->class;
2553 classes[dev->devno] = ATA_DEV_NONE;
2555 dev->class = ATA_DEV_UNKNOWN;
2558 /* read IDENTIFY page and configure devices. We have to do the identify
2559 specific sequence bass-ackwards so that PDIAG- is released by
2562 ata_for_each_dev(dev, &ap->link, ALL_REVERSE) {
2563 if (tries[dev->devno])
2564 dev->class = classes[dev->devno];
2566 if (!ata_dev_enabled(dev))
2569 rc = ata_dev_read_id(dev, &dev->class, ATA_READID_POSTRESET,
2575 /* Now ask for the cable type as PDIAG- should have been released */
2576 if (ap->ops->cable_detect)
2577 ap->cbl = ap->ops->cable_detect(ap);
2579 /* We may have SATA bridge glue hiding here irrespective of
2580 * the reported cable types and sensed types. When SATA
2581 * drives indicate we have a bridge, we don't know which end
2582 * of the link the bridge is which is a problem.
2584 ata_for_each_dev(dev, &ap->link, ENABLED)
2585 if (ata_id_is_sata(dev->id))
2586 ap->cbl = ATA_CBL_SATA;
2588 /* After the identify sequence we can now set up the devices. We do
2589 this in the normal order so that the user doesn't get confused */
2591 ata_for_each_dev(dev, &ap->link, ENABLED) {
2592 ap->link.eh_context.i.flags |= ATA_EHI_PRINTINFO;
2593 rc = ata_dev_configure(dev);
2594 ap->link.eh_context.i.flags &= ~ATA_EHI_PRINTINFO;
2599 /* configure transfer mode */
2600 rc = ata_set_mode(&ap->link, &dev);
2604 ata_for_each_dev(dev, &ap->link, ENABLED)
2610 tries[dev->devno]--;
2614 /* eeek, something went very wrong, give up */
2615 tries[dev->devno] = 0;
2619 /* give it just one more chance */
2620 tries[dev->devno] = min(tries[dev->devno], 1);
2622 if (tries[dev->devno] == 1) {
2623 /* This is the last chance, better to slow
2624 * down than lose it.
2626 sata_down_spd_limit(&ap->link, 0);
2627 ata_down_xfermask_limit(dev, ATA_DNXFER_PIO);
2631 if (!tries[dev->devno])
2632 ata_dev_disable(dev);
2638 * sata_print_link_status - Print SATA link status
2639 * @link: SATA link to printk link status about
2641 * This function prints link speed and status of a SATA link.
2646 static void sata_print_link_status(struct ata_link *link)
2648 u32 sstatus, scontrol, tmp;
2650 if (sata_scr_read(link, SCR_STATUS, &sstatus))
2652 sata_scr_read(link, SCR_CONTROL, &scontrol);
2654 if (ata_phys_link_online(link)) {
2655 tmp = (sstatus >> 4) & 0xf;
2656 ata_link_info(link, "SATA link up %s (SStatus %X SControl %X)\n",
2657 sata_spd_string(tmp), sstatus, scontrol);
2659 ata_link_info(link, "SATA link down (SStatus %X SControl %X)\n",
2665 * ata_dev_pair - return other device on cable
2668 * Obtain the other device on the same cable, or if none is
2669 * present NULL is returned
2672 struct ata_device *ata_dev_pair(struct ata_device *adev)
2674 struct ata_link *link = adev->link;
2675 struct ata_device *pair = &link->device[1 - adev->devno];
2676 if (!ata_dev_enabled(pair))
2682 * sata_down_spd_limit - adjust SATA spd limit downward
2683 * @link: Link to adjust SATA spd limit for
2684 * @spd_limit: Additional limit
2686 * Adjust SATA spd limit of @link downward. Note that this
2687 * function only adjusts the limit. The change must be applied
2688 * using sata_set_spd().
2690 * If @spd_limit is non-zero, the speed is limited to equal to or
2691 * lower than @spd_limit if such speed is supported. If
2692 * @spd_limit is slower than any supported speed, only the lowest
2693 * supported speed is allowed.
2696 * Inherited from caller.
2699 * 0 on success, negative errno on failure
2701 int sata_down_spd_limit(struct ata_link *link, u32 spd_limit)
2703 u32 sstatus, spd, mask;
2706 if (!sata_scr_valid(link))
2709 /* If SCR can be read, use it to determine the current SPD.
2710 * If not, use cached value in link->sata_spd.
2712 rc = sata_scr_read(link, SCR_STATUS, &sstatus);
2713 if (rc == 0 && ata_sstatus_online(sstatus))
2714 spd = (sstatus >> 4) & 0xf;
2716 spd = link->sata_spd;
2718 mask = link->sata_spd_limit;
2722 /* unconditionally mask off the highest bit */
2723 bit = fls(mask) - 1;
2724 mask &= ~(1 << bit);
2726 /* Mask off all speeds higher than or equal to the current
2727 * one. Force 1.5Gbps if current SPD is not available.
2730 mask &= (1 << (spd - 1)) - 1;
2734 /* were we already at the bottom? */
2739 if (mask & ((1 << spd_limit) - 1))
2740 mask &= (1 << spd_limit) - 1;
2742 bit = ffs(mask) - 1;
2747 link->sata_spd_limit = mask;
2749 ata_link_warn(link, "limiting SATA link speed to %s\n",
2750 sata_spd_string(fls(mask)));
2755 static int __sata_set_spd_needed(struct ata_link *link, u32 *scontrol)
2757 struct ata_link *host_link = &link->ap->link;
2758 u32 limit, target, spd;
2760 limit = link->sata_spd_limit;
2762 /* Don't configure downstream link faster than upstream link.
2763 * It doesn't speed up anything and some PMPs choke on such
2766 if (!ata_is_host_link(link) && host_link->sata_spd)
2767 limit &= (1 << host_link->sata_spd) - 1;
2769 if (limit == UINT_MAX)
2772 target = fls(limit);
2774 spd = (*scontrol >> 4) & 0xf;
2775 *scontrol = (*scontrol & ~0xf0) | ((target & 0xf) << 4);
2777 return spd != target;
2781 * sata_set_spd_needed - is SATA spd configuration needed
2782 * @link: Link in question
2784 * Test whether the spd limit in SControl matches
2785 * @link->sata_spd_limit. This function is used to determine
2786 * whether hardreset is necessary to apply SATA spd
2790 * Inherited from caller.
2793 * 1 if SATA spd configuration is needed, 0 otherwise.
2795 static int sata_set_spd_needed(struct ata_link *link)
2799 if (sata_scr_read(link, SCR_CONTROL, &scontrol))
2802 return __sata_set_spd_needed(link, &scontrol);
2806 * sata_set_spd - set SATA spd according to spd limit
2807 * @link: Link to set SATA spd for
2809 * Set SATA spd of @link according to sata_spd_limit.
2812 * Inherited from caller.
2815 * 0 if spd doesn't need to be changed, 1 if spd has been
2816 * changed. Negative errno if SCR registers are inaccessible.
2818 int sata_set_spd(struct ata_link *link)
2823 if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
2826 if (!__sata_set_spd_needed(link, &scontrol))
2829 if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol)))
2836 * This mode timing computation functionality is ported over from
2837 * drivers/ide/ide-timing.h and was originally written by Vojtech Pavlik
2840 * PIO 0-4, MWDMA 0-2 and UDMA 0-6 timings (in nanoseconds).
2841 * These were taken from ATA/ATAPI-6 standard, rev 0a, except
2842 * for UDMA6, which is currently supported only by Maxtor drives.
2844 * For PIO 5/6 MWDMA 3/4 see the CFA specification 3.0.
2847 static const struct ata_timing ata_timing[] = {
2848 /* { XFER_PIO_SLOW, 120, 290, 240, 960, 290, 240, 0, 960, 0 }, */
2849 { XFER_PIO_0, 70, 290, 240, 600, 165, 150, 0, 600, 0 },
2850 { XFER_PIO_1, 50, 290, 93, 383, 125, 100, 0, 383, 0 },
2851 { XFER_PIO_2, 30, 290, 40, 330, 100, 90, 0, 240, 0 },
2852 { XFER_PIO_3, 30, 80, 70, 180, 80, 70, 0, 180, 0 },
2853 { XFER_PIO_4, 25, 70, 25, 120, 70, 25, 0, 120, 0 },
2854 { XFER_PIO_5, 15, 65, 25, 100, 65, 25, 0, 100, 0 },
2855 { XFER_PIO_6, 10, 55, 20, 80, 55, 20, 0, 80, 0 },
2857 { XFER_SW_DMA_0, 120, 0, 0, 0, 480, 480, 50, 960, 0 },
2858 { XFER_SW_DMA_1, 90, 0, 0, 0, 240, 240, 30, 480, 0 },
2859 { XFER_SW_DMA_2, 60, 0, 0, 0, 120, 120, 20, 240, 0 },
2861 { XFER_MW_DMA_0, 60, 0, 0, 0, 215, 215, 20, 480, 0 },
2862 { XFER_MW_DMA_1, 45, 0, 0, 0, 80, 50, 5, 150, 0 },
2863 { XFER_MW_DMA_2, 25, 0, 0, 0, 70, 25, 5, 120, 0 },
2864 { XFER_MW_DMA_3, 25, 0, 0, 0, 65, 25, 5, 100, 0 },
2865 { XFER_MW_DMA_4, 25, 0, 0, 0, 55, 20, 5, 80, 0 },
2867 /* { XFER_UDMA_SLOW, 0, 0, 0, 0, 0, 0, 0, 0, 150 }, */
2868 { XFER_UDMA_0, 0, 0, 0, 0, 0, 0, 0, 0, 120 },
2869 { XFER_UDMA_1, 0, 0, 0, 0, 0, 0, 0, 0, 80 },
2870 { XFER_UDMA_2, 0, 0, 0, 0, 0, 0, 0, 0, 60 },
2871 { XFER_UDMA_3, 0, 0, 0, 0, 0, 0, 0, 0, 45 },
2872 { XFER_UDMA_4, 0, 0, 0, 0, 0, 0, 0, 0, 30 },
2873 { XFER_UDMA_5, 0, 0, 0, 0, 0, 0, 0, 0, 20 },
2874 { XFER_UDMA_6, 0, 0, 0, 0, 0, 0, 0, 0, 15 },
2879 #define ENOUGH(v, unit) (((v)-1)/(unit)+1)
2880 #define EZ(v, unit) ((v)?ENOUGH(v, unit):0)
2882 static void ata_timing_quantize(const struct ata_timing *t, struct ata_timing *q, int T, int UT)
2884 q->setup = EZ(t->setup * 1000, T);
2885 q->act8b = EZ(t->act8b * 1000, T);
2886 q->rec8b = EZ(t->rec8b * 1000, T);
2887 q->cyc8b = EZ(t->cyc8b * 1000, T);
2888 q->active = EZ(t->active * 1000, T);
2889 q->recover = EZ(t->recover * 1000, T);
2890 q->dmack_hold = EZ(t->dmack_hold * 1000, T);
2891 q->cycle = EZ(t->cycle * 1000, T);
2892 q->udma = EZ(t->udma * 1000, UT);
2895 void ata_timing_merge(const struct ata_timing *a, const struct ata_timing *b,
2896 struct ata_timing *m, unsigned int what)
2898 if (what & ATA_TIMING_SETUP ) m->setup = max(a->setup, b->setup);
2899 if (what & ATA_TIMING_ACT8B ) m->act8b = max(a->act8b, b->act8b);
2900 if (what & ATA_TIMING_REC8B ) m->rec8b = max(a->rec8b, b->rec8b);
2901 if (what & ATA_TIMING_CYC8B ) m->cyc8b = max(a->cyc8b, b->cyc8b);
2902 if (what & ATA_TIMING_ACTIVE ) m->active = max(a->active, b->active);
2903 if (what & ATA_TIMING_RECOVER) m->recover = max(a->recover, b->recover);
2904 if (what & ATA_TIMING_DMACK_HOLD) m->dmack_hold = max(a->dmack_hold, b->dmack_hold);
2905 if (what & ATA_TIMING_CYCLE ) m->cycle = max(a->cycle, b->cycle);
2906 if (what & ATA_TIMING_UDMA ) m->udma = max(a->udma, b->udma);
2909 const struct ata_timing *ata_timing_find_mode(u8 xfer_mode)
2911 const struct ata_timing *t = ata_timing;
2913 while (xfer_mode > t->mode)
2916 if (xfer_mode == t->mode)
2921 int ata_timing_compute(struct ata_device *adev, unsigned short speed,
2922 struct ata_timing *t, int T, int UT)
2924 const u16 *id = adev->id;
2925 const struct ata_timing *s;
2926 struct ata_timing p;
2932 if (!(s = ata_timing_find_mode(speed)))
2935 memcpy(t, s, sizeof(*s));
2938 * If the drive is an EIDE drive, it can tell us it needs extended
2939 * PIO/MW_DMA cycle timing.
2942 if (id[ATA_ID_FIELD_VALID] & 2) { /* EIDE drive */
2943 memset(&p, 0, sizeof(p));
2945 if (speed >= XFER_PIO_0 && speed < XFER_SW_DMA_0) {
2946 if (speed <= XFER_PIO_2)
2947 p.cycle = p.cyc8b = id[ATA_ID_EIDE_PIO];
2948 else if ((speed <= XFER_PIO_4) ||
2949 (speed == XFER_PIO_5 && !ata_id_is_cfa(id)))
2950 p.cycle = p.cyc8b = id[ATA_ID_EIDE_PIO_IORDY];
2951 } else if (speed >= XFER_MW_DMA_0 && speed <= XFER_MW_DMA_2)
2952 p.cycle = id[ATA_ID_EIDE_DMA_MIN];
2954 ata_timing_merge(&p, t, t, ATA_TIMING_CYCLE | ATA_TIMING_CYC8B);
2958 * Convert the timing to bus clock counts.
2961 ata_timing_quantize(t, t, T, UT);
2964 * Even in DMA/UDMA modes we still use PIO access for IDENTIFY,
2965 * S.M.A.R.T * and some other commands. We have to ensure that the
2966 * DMA cycle timing is slower/equal than the fastest PIO timing.
2969 if (speed > XFER_PIO_6) {
2970 ata_timing_compute(adev, adev->pio_mode, &p, T, UT);
2971 ata_timing_merge(&p, t, t, ATA_TIMING_ALL);
2975 * Lengthen active & recovery time so that cycle time is correct.
2978 if (t->act8b + t->rec8b < t->cyc8b) {
2979 t->act8b += (t->cyc8b - (t->act8b + t->rec8b)) / 2;
2980 t->rec8b = t->cyc8b - t->act8b;
2983 if (t->active + t->recover < t->cycle) {
2984 t->active += (t->cycle - (t->active + t->recover)) / 2;
2985 t->recover = t->cycle - t->active;
2988 /* In a few cases quantisation may produce enough errors to
2989 leave t->cycle too low for the sum of active and recovery
2990 if so we must correct this */
2991 if (t->active + t->recover > t->cycle)
2992 t->cycle = t->active + t->recover;
2998 * ata_timing_cycle2mode - find xfer mode for the specified cycle duration
2999 * @xfer_shift: ATA_SHIFT_* value for transfer type to examine.
3000 * @cycle: cycle duration in ns
3002 * Return matching xfer mode for @cycle. The returned mode is of
3003 * the transfer type specified by @xfer_shift. If @cycle is too
3004 * slow for @xfer_shift, 0xff is returned. If @cycle is faster
3005 * than the fastest known mode, the fasted mode is returned.
3011 * Matching xfer_mode, 0xff if no match found.
3013 u8 ata_timing_cycle2mode(unsigned int xfer_shift, int cycle)
3015 u8 base_mode = 0xff, last_mode = 0xff;
3016 const struct ata_xfer_ent *ent;
3017 const struct ata_timing *t;
3019 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
3020 if (ent->shift == xfer_shift)
3021 base_mode = ent->base;
3023 for (t = ata_timing_find_mode(base_mode);
3024 t && ata_xfer_mode2shift(t->mode) == xfer_shift; t++) {
3025 unsigned short this_cycle;
3027 switch (xfer_shift) {
3029 case ATA_SHIFT_MWDMA:
3030 this_cycle = t->cycle;
3032 case ATA_SHIFT_UDMA:
3033 this_cycle = t->udma;
3039 if (cycle > this_cycle)
3042 last_mode = t->mode;
3049 * ata_down_xfermask_limit - adjust dev xfer masks downward
3050 * @dev: Device to adjust xfer masks
3051 * @sel: ATA_DNXFER_* selector
3053 * Adjust xfer masks of @dev downward. Note that this function
3054 * does not apply the change. Invoking ata_set_mode() afterwards
3055 * will apply the limit.
3058 * Inherited from caller.
3061 * 0 on success, negative errno on failure
3063 int ata_down_xfermask_limit(struct ata_device *dev, unsigned int sel)
3066 unsigned long orig_mask, xfer_mask;
3067 unsigned long pio_mask, mwdma_mask, udma_mask;
3070 quiet = !!(sel & ATA_DNXFER_QUIET);
3071 sel &= ~ATA_DNXFER_QUIET;
3073 xfer_mask = orig_mask = ata_pack_xfermask(dev->pio_mask,
3076 ata_unpack_xfermask(xfer_mask, &pio_mask, &mwdma_mask, &udma_mask);
3079 case ATA_DNXFER_PIO:
3080 highbit = fls(pio_mask) - 1;
3081 pio_mask &= ~(1 << highbit);
3084 case ATA_DNXFER_DMA:
3086 highbit = fls(udma_mask) - 1;
3087 udma_mask &= ~(1 << highbit);
3090 } else if (mwdma_mask) {
3091 highbit = fls(mwdma_mask) - 1;
3092 mwdma_mask &= ~(1 << highbit);
3098 case ATA_DNXFER_40C:
3099 udma_mask &= ATA_UDMA_MASK_40C;
3102 case ATA_DNXFER_FORCE_PIO0:
3104 case ATA_DNXFER_FORCE_PIO:
3113 xfer_mask &= ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask);
3115 if (!(xfer_mask & ATA_MASK_PIO) || xfer_mask == orig_mask)
3119 if (xfer_mask & (ATA_MASK_MWDMA | ATA_MASK_UDMA))
3120 snprintf(buf, sizeof(buf), "%s:%s",
3121 ata_mode_string(xfer_mask),
3122 ata_mode_string(xfer_mask & ATA_MASK_PIO));
3124 snprintf(buf, sizeof(buf), "%s",
3125 ata_mode_string(xfer_mask));
3127 ata_dev_warn(dev, "limiting speed to %s\n", buf);
3130 ata_unpack_xfermask(xfer_mask, &dev->pio_mask, &dev->mwdma_mask,
3136 static int ata_dev_set_mode(struct ata_device *dev)
3138 struct ata_port *ap = dev->link->ap;
3139 struct ata_eh_context *ehc = &dev->link->eh_context;
3140 const bool nosetxfer = dev->horkage & ATA_HORKAGE_NOSETXFER;
3141 const char *dev_err_whine = "";
3142 int ign_dev_err = 0;
3143 unsigned int err_mask = 0;
3146 dev->flags &= ~ATA_DFLAG_PIO;
3147 if (dev->xfer_shift == ATA_SHIFT_PIO)
3148 dev->flags |= ATA_DFLAG_PIO;
3150 if (nosetxfer && ap->flags & ATA_FLAG_SATA && ata_id_is_sata(dev->id))
3151 dev_err_whine = " (SET_XFERMODE skipped)";
3155 "NOSETXFER but PATA detected - can't "
3156 "skip SETXFER, might malfunction\n");
3157 err_mask = ata_dev_set_xfermode(dev);
3160 if (err_mask & ~AC_ERR_DEV)
3164 ehc->i.flags |= ATA_EHI_POST_SETMODE;
3165 rc = ata_dev_revalidate(dev, ATA_DEV_UNKNOWN, 0);
3166 ehc->i.flags &= ~ATA_EHI_POST_SETMODE;
3170 if (dev->xfer_shift == ATA_SHIFT_PIO) {
3171 /* Old CFA may refuse this command, which is just fine */
3172 if (ata_id_is_cfa(dev->id))
3174 /* Catch several broken garbage emulations plus some pre
3176 if (ata_id_major_version(dev->id) == 0 &&
3177 dev->pio_mode <= XFER_PIO_2)
3179 /* Some very old devices and some bad newer ones fail
3180 any kind of SET_XFERMODE request but support PIO0-2
3181 timings and no IORDY */
3182 if (!ata_id_has_iordy(dev->id) && dev->pio_mode <= XFER_PIO_2)
3185 /* Early MWDMA devices do DMA but don't allow DMA mode setting.
3186 Don't fail an MWDMA0 set IFF the device indicates it is in MWDMA0 */
3187 if (dev->xfer_shift == ATA_SHIFT_MWDMA &&
3188 dev->dma_mode == XFER_MW_DMA_0 &&
3189 (dev->id[63] >> 8) & 1)
3192 /* if the device is actually configured correctly, ignore dev err */
3193 if (dev->xfer_mode == ata_xfer_mask2mode(ata_id_xfermask(dev->id)))
3196 if (err_mask & AC_ERR_DEV) {
3200 dev_err_whine = " (device error ignored)";
3203 DPRINTK("xfer_shift=%u, xfer_mode=0x%x\n",
3204 dev->xfer_shift, (int)dev->xfer_mode);
3206 ata_dev_info(dev, "configured for %s%s\n",
3207 ata_mode_string(ata_xfer_mode2mask(dev->xfer_mode)),
3213 ata_dev_err(dev, "failed to set xfermode (err_mask=0x%x)\n", err_mask);
3218 * ata_do_set_mode - Program timings and issue SET FEATURES - XFER
3219 * @link: link on which timings will be programmed
3220 * @r_failed_dev: out parameter for failed device
3222 * Standard implementation of the function used to tune and set
3223 * ATA device disk transfer mode (PIO3, UDMA6, etc.). If
3224 * ata_dev_set_mode() fails, pointer to the failing device is
3225 * returned in @r_failed_dev.
3228 * PCI/etc. bus probe sem.
3231 * 0 on success, negative errno otherwise
3234 int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev)
3236 struct ata_port *ap = link->ap;
3237 struct ata_device *dev;
3238 int rc = 0, used_dma = 0, found = 0;
3240 /* step 1: calculate xfer_mask */
3241 ata_for_each_dev(dev, link, ENABLED) {
3242 unsigned long pio_mask, dma_mask;
3243 unsigned int mode_mask;
3245 mode_mask = ATA_DMA_MASK_ATA;
3246 if (dev->class == ATA_DEV_ATAPI)
3247 mode_mask = ATA_DMA_MASK_ATAPI;
3248 else if (ata_id_is_cfa(dev->id))
3249 mode_mask = ATA_DMA_MASK_CFA;
3251 ata_dev_xfermask(dev);
3252 ata_force_xfermask(dev);
3254 pio_mask = ata_pack_xfermask(dev->pio_mask, 0, 0);
3255 dma_mask = ata_pack_xfermask(0, dev->mwdma_mask, dev->udma_mask);
3257 if (libata_dma_mask & mode_mask)
3258 dma_mask = ata_pack_xfermask(0, dev->mwdma_mask, dev->udma_mask);
3262 dev->pio_mode = ata_xfer_mask2mode(pio_mask);
3263 dev->dma_mode = ata_xfer_mask2mode(dma_mask);
3266 if (ata_dma_enabled(dev))
3272 /* step 2: always set host PIO timings */
3273 ata_for_each_dev(dev, link, ENABLED) {
3274 if (dev->pio_mode == 0xff) {
3275 ata_dev_warn(dev, "no PIO support\n");
3280 dev->xfer_mode = dev->pio_mode;
3281 dev->xfer_shift = ATA_SHIFT_PIO;
3282 if (ap->ops->set_piomode)
3283 ap->ops->set_piomode(ap, dev);
3286 /* step 3: set host DMA timings */
3287 ata_for_each_dev(dev, link, ENABLED) {
3288 if (!ata_dma_enabled(dev))
3291 dev->xfer_mode = dev->dma_mode;
3292 dev->xfer_shift = ata_xfer_mode2shift(dev->dma_mode);
3293 if (ap->ops->set_dmamode)
3294 ap->ops->set_dmamode(ap, dev);
3297 /* step 4: update devices' xfer mode */
3298 ata_for_each_dev(dev, link, ENABLED) {
3299 rc = ata_dev_set_mode(dev);
3304 /* Record simplex status. If we selected DMA then the other
3305 * host channels are not permitted to do so.
3307 if (used_dma && (ap->host->flags & ATA_HOST_SIMPLEX))
3308 ap->host->simplex_claimed = ap;
3312 *r_failed_dev = dev;
3317 * ata_wait_ready - wait for link to become ready
3318 * @link: link to be waited on
3319 * @deadline: deadline jiffies for the operation
3320 * @check_ready: callback to check link readiness
3322 * Wait for @link to become ready. @check_ready should return
3323 * positive number if @link is ready, 0 if it isn't, -ENODEV if
3324 * link doesn't seem to be occupied, other errno for other error
3327 * Transient -ENODEV conditions are allowed for
3328 * ATA_TMOUT_FF_WAIT.
3334 * 0 if @linke is ready before @deadline; otherwise, -errno.
3336 int ata_wait_ready(struct ata_link *link, unsigned long deadline,
3337 int (*check_ready)(struct ata_link *link))
3339 unsigned long start = jiffies;
3340 unsigned long nodev_deadline;
3343 /* choose which 0xff timeout to use, read comment in libata.h */
3344 if (link->ap->host->flags & ATA_HOST_PARALLEL_SCAN)
3345 nodev_deadline = ata_deadline(start, ATA_TMOUT_FF_WAIT_LONG);
3347 nodev_deadline = ata_deadline(start, ATA_TMOUT_FF_WAIT);
3349 /* Slave readiness can't be tested separately from master. On
3350 * M/S emulation configuration, this function should be called
3351 * only on the master and it will handle both master and slave.
3353 WARN_ON(link == link->ap->slave_link);
3355 if (time_after(nodev_deadline, deadline))
3356 nodev_deadline = deadline;
3359 unsigned long now = jiffies;
3362 ready = tmp = check_ready(link);
3367 * -ENODEV could be transient. Ignore -ENODEV if link
3368 * is online. Also, some SATA devices take a long
3369 * time to clear 0xff after reset. Wait for
3370 * ATA_TMOUT_FF_WAIT[_LONG] on -ENODEV if link isn't
3373 * Note that some PATA controllers (pata_ali) explode
3374 * if status register is read more than once when
3375 * there's no device attached.
3377 if (ready == -ENODEV) {
3378 if (ata_link_online(link))
3380 else if ((link->ap->flags & ATA_FLAG_SATA) &&
3381 !ata_link_offline(link) &&
3382 time_before(now, nodev_deadline))
3388 if (time_after(now, deadline))
3391 if (!warned && time_after(now, start + 5 * HZ) &&
3392 (deadline - now > 3 * HZ)) {
3394 "link is slow to respond, please be patient "
3395 "(ready=%d)\n", tmp);
3399 ata_msleep(link->ap, 50);
3404 * ata_wait_after_reset - wait for link to become ready after reset
3405 * @link: link to be waited on
3406 * @deadline: deadline jiffies for the operation
3407 * @check_ready: callback to check link readiness
3409 * Wait for @link to become ready after reset.
3415 * 0 if @linke is ready before @deadline; otherwise, -errno.
3417 int ata_wait_after_reset(struct ata_link *link, unsigned long deadline,
3418 int (*check_ready)(struct ata_link *link))
3420 ata_msleep(link->ap, ATA_WAIT_AFTER_RESET);
3422 return ata_wait_ready(link, deadline, check_ready);
3426 * sata_link_debounce - debounce SATA phy status
3427 * @link: ATA link to debounce SATA phy status for
3428 * @params: timing parameters { interval, duratinon, timeout } in msec
3429 * @deadline: deadline jiffies for the operation
3431 * Make sure SStatus of @link reaches stable state, determined by
3432 * holding the same value where DET is not 1 for @duration polled
3433 * every @interval, before @timeout. Timeout constraints the
3434 * beginning of the stable state. Because DET gets stuck at 1 on
3435 * some controllers after hot unplugging, this functions waits
3436 * until timeout then returns 0 if DET is stable at 1.
3438 * @timeout is further limited by @deadline. The sooner of the
3442 * Kernel thread context (may sleep)
3445 * 0 on success, -errno on failure.
3447 int sata_link_debounce(struct ata_link *link, const unsigned long *params,
3448 unsigned long deadline)
3450 unsigned long interval = params[0];
3451 unsigned long duration = params[1];
3452 unsigned long last_jiffies, t;
3456 t = ata_deadline(jiffies, params[2]);
3457 if (time_before(t, deadline))
3460 if ((rc = sata_scr_read(link, SCR_STATUS, &cur)))
3465 last_jiffies = jiffies;
3468 ata_msleep(link->ap, interval);
3469 if ((rc = sata_scr_read(link, SCR_STATUS, &cur)))
3475 if (cur == 1 && time_before(jiffies, deadline))
3477 if (time_after(jiffies,
3478 ata_deadline(last_jiffies, duration)))
3483 /* unstable, start over */
3485 last_jiffies = jiffies;
3487 /* Check deadline. If debouncing failed, return
3488 * -EPIPE to tell upper layer to lower link speed.
3490 if (time_after(jiffies, deadline))
3496 * sata_link_resume - resume SATA link
3497 * @link: ATA link to resume SATA
3498 * @params: timing parameters { interval, duratinon, timeout } in msec
3499 * @deadline: deadline jiffies for the operation
3501 * Resume SATA phy @link and debounce it.
3504 * Kernel thread context (may sleep)
3507 * 0 on success, -errno on failure.
3509 int sata_link_resume(struct ata_link *link, const unsigned long *params,
3510 unsigned long deadline)
3512 int tries = ATA_LINK_RESUME_TRIES;
3513 u32 scontrol, serror;
3516 if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
3520 * Writes to SControl sometimes get ignored under certain
3521 * controllers (ata_piix SIDPR). Make sure DET actually is
3525 scontrol = (scontrol & 0x0f0) | 0x300;
3526 if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol)))
3529 * Some PHYs react badly if SStatus is pounded
3530 * immediately after resuming. Delay 200ms before
3533 ata_msleep(link->ap, 200);
3535 /* is SControl restored correctly? */
3536 if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
3538 } while ((scontrol & 0xf0f) != 0x300 && --tries);
3540 if ((scontrol & 0xf0f) != 0x300) {
3541 ata_link_warn(link, "failed to resume link (SControl %X)\n",
3546 if (tries < ATA_LINK_RESUME_TRIES)
3547 ata_link_warn(link, "link resume succeeded after %d retries\n",
3548 ATA_LINK_RESUME_TRIES - tries);
3550 if ((rc = sata_link_debounce(link, params, deadline)))
3553 /* clear SError, some PHYs require this even for SRST to work */
3554 if (!(rc = sata_scr_read(link, SCR_ERROR, &serror)))
3555 rc = sata_scr_write(link, SCR_ERROR, serror);
3557 return rc != -EINVAL ? rc : 0;
3561 * sata_link_scr_lpm - manipulate SControl IPM and SPM fields
3562 * @link: ATA link to manipulate SControl for
3563 * @policy: LPM policy to configure
3564 * @spm_wakeup: initiate LPM transition to active state
3566 * Manipulate the IPM field of the SControl register of @link
3567 * according to @policy. If @policy is ATA_LPM_MAX_POWER and
3568 * @spm_wakeup is %true, the SPM field is manipulated to wake up
3569 * the link. This function also clears PHYRDY_CHG before
3576 * 0 on succes, -errno otherwise.
3578 int sata_link_scr_lpm(struct ata_link *link, enum ata_lpm_policy policy,
3581 struct ata_eh_context *ehc = &link->eh_context;
3582 bool woken_up = false;
3586 rc = sata_scr_read(link, SCR_CONTROL, &scontrol);
3591 case ATA_LPM_MAX_POWER:
3592 /* disable all LPM transitions */
3593 scontrol |= (0x3 << 8);
3594 /* initiate transition to active state */
3596 scontrol |= (0x4 << 12);
3600 case ATA_LPM_MED_POWER:
3601 /* allow LPM to PARTIAL */
3602 scontrol &= ~(0x1 << 8);
3603 scontrol |= (0x2 << 8);
3605 case ATA_LPM_MIN_POWER:
3606 if (ata_link_nr_enabled(link) > 0)
3607 /* no restrictions on LPM transitions */
3608 scontrol &= ~(0x3 << 8);
3610 /* empty port, power off */
3612 scontrol |= (0x1 << 2);
3619 rc = sata_scr_write(link, SCR_CONTROL, scontrol);
3623 /* give the link time to transit out of LPM state */
3627 /* clear PHYRDY_CHG from SError */
3628 ehc->i.serror &= ~SERR_PHYRDY_CHG;
3629 return sata_scr_write(link, SCR_ERROR, SERR_PHYRDY_CHG);
3633 * ata_std_prereset - prepare for reset
3634 * @link: ATA link to be reset
3635 * @deadline: deadline jiffies for the operation
3637 * @link is about to be reset. Initialize it. Failure from
3638 * prereset makes libata abort whole reset sequence and give up
3639 * that port, so prereset should be best-effort. It does its
3640 * best to prepare for reset sequence but if things go wrong, it
3641 * should just whine, not fail.
3644 * Kernel thread context (may sleep)
3647 * 0 on success, -errno otherwise.
3649 int ata_std_prereset(struct ata_link *link, unsigned long deadline)
3651 struct ata_port *ap = link->ap;
3652 struct ata_eh_context *ehc = &link->eh_context;
3653 const unsigned long *timing = sata_ehc_deb_timing(ehc);
3656 /* if we're about to do hardreset, nothing more to do */
3657 if (ehc->i.action & ATA_EH_HARDRESET)
3660 /* if SATA, resume link */
3661 if (ap->flags & ATA_FLAG_SATA) {
3662 rc = sata_link_resume(link, timing, deadline);
3663 /* whine about phy resume failure but proceed */
3664 if (rc && rc != -EOPNOTSUPP)
3666 "failed to resume link for reset (errno=%d)\n",
3670 /* no point in trying softreset on offline link */
3671 if (ata_phys_link_offline(link))
3672 ehc->i.action &= ~ATA_EH_SOFTRESET;
3678 * sata_link_hardreset - reset link via SATA phy reset
3679 * @link: link to reset
3680 * @timing: timing parameters { interval, duratinon, timeout } in msec
3681 * @deadline: deadline jiffies for the operation
3682 * @online: optional out parameter indicating link onlineness
3683 * @check_ready: optional callback to check link readiness
3685 * SATA phy-reset @link using DET bits of SControl register.
3686 * After hardreset, link readiness is waited upon using
3687 * ata_wait_ready() if @check_ready is specified. LLDs are
3688 * allowed to not specify @check_ready and wait itself after this
3689 * function returns. Device classification is LLD's
3692 * *@online is set to one iff reset succeeded and @link is online
3696 * Kernel thread context (may sleep)
3699 * 0 on success, -errno otherwise.
3701 int sata_link_hardreset(struct ata_link *link, const unsigned long *timing,
3702 unsigned long deadline,
3703 bool *online, int (*check_ready)(struct ata_link *))
3713 if (sata_set_spd_needed(link)) {
3714 /* SATA spec says nothing about how to reconfigure
3715 * spd. To be on the safe side, turn off phy during
3716 * reconfiguration. This works for at least ICH7 AHCI
3719 if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
3722 scontrol = (scontrol & 0x0f0) | 0x304;
3724 if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol)))
3730 /* issue phy wake/reset */
3731 if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
3734 scontrol = (scontrol & 0x0f0) | 0x301;
3736 if ((rc = sata_scr_write_flush(link, SCR_CONTROL, scontrol)))
3739 /* Couldn't find anything in SATA I/II specs, but AHCI-1.1
3740 * 10.4.2 says at least 1 ms.
3742 ata_msleep(link->ap, 1);
3744 /* bring link back */
3745 rc = sata_link_resume(link, timing, deadline);
3748 /* if link is offline nothing more to do */
3749 if (ata_phys_link_offline(link))
3752 /* Link is online. From this point, -ENODEV too is an error. */
3756 if (sata_pmp_supported(link->ap) && ata_is_host_link(link)) {
3757 /* If PMP is supported, we have to do follow-up SRST.
3758 * Some PMPs don't send D2H Reg FIS after hardreset if
3759 * the first port is empty. Wait only for
3760 * ATA_TMOUT_PMP_SRST_WAIT.
3763 unsigned long pmp_deadline;
3765 pmp_deadline = ata_deadline(jiffies,
3766 ATA_TMOUT_PMP_SRST_WAIT);
3767 if (time_after(pmp_deadline, deadline))
3768 pmp_deadline = deadline;
3769 ata_wait_ready(link, pmp_deadline, check_ready);
3777 rc = ata_wait_ready(link, deadline, check_ready);
3779 if (rc && rc != -EAGAIN) {
3780 /* online is set iff link is online && reset succeeded */
3783 ata_link_err(link, "COMRESET failed (errno=%d)\n", rc);
3785 DPRINTK("EXIT, rc=%d\n", rc);
3790 * sata_std_hardreset - COMRESET w/o waiting or classification
3791 * @link: link to reset
3792 * @class: resulting class of attached device
3793 * @deadline: deadline jiffies for the operation
3795 * Standard SATA COMRESET w/o waiting or classification.
3798 * Kernel thread context (may sleep)
3801 * 0 if link offline, -EAGAIN if link online, -errno on errors.
3803 int sata_std_hardreset(struct ata_link *link, unsigned int *class,
3804 unsigned long deadline)
3806 const unsigned long *timing = sata_ehc_deb_timing(&link->eh_context);
3811 rc = sata_link_hardreset(link, timing, deadline, &online, NULL);
3812 return online ? -EAGAIN : rc;
3816 * ata_std_postreset - standard postreset callback
3817 * @link: the target ata_link
3818 * @classes: classes of attached devices
3820 * This function is invoked after a successful reset. Note that
3821 * the device might have been reset more than once using
3822 * different reset methods before postreset is invoked.
3825 * Kernel thread context (may sleep)
3827 void ata_std_postreset(struct ata_link *link, unsigned int *classes)
3833 /* reset complete, clear SError */
3834 if (!sata_scr_read(link, SCR_ERROR, &serror))
3835 sata_scr_write(link, SCR_ERROR, serror);
3837 /* print link status */
3838 sata_print_link_status(link);
3844 * ata_dev_same_device - Determine whether new ID matches configured device
3845 * @dev: device to compare against
3846 * @new_class: class of the new device
3847 * @new_id: IDENTIFY page of the new device
3849 * Compare @new_class and @new_id against @dev and determine
3850 * whether @dev is the device indicated by @new_class and
3857 * 1 if @dev matches @new_class and @new_id, 0 otherwise.
3859 static int ata_dev_same_device(struct ata_device *dev, unsigned int new_class,
3862 const u16 *old_id = dev->id;
3863 unsigned char model[2][ATA_ID_PROD_LEN + 1];
3864 unsigned char serial[2][ATA_ID_SERNO_LEN + 1];
3866 if (dev->class != new_class) {
3867 ata_dev_info(dev, "class mismatch %d != %d\n",
3868 dev->class, new_class);
3872 ata_id_c_string(old_id, model[0], ATA_ID_PROD, sizeof(model[0]));
3873 ata_id_c_string(new_id, model[1], ATA_ID_PROD, sizeof(model[1]));
3874 ata_id_c_string(old_id, serial[0], ATA_ID_SERNO, sizeof(serial[0]));
3875 ata_id_c_string(new_id, serial[1], ATA_ID_SERNO, sizeof(serial[1]));
3877 if (strcmp(model[0], model[1])) {
3878 ata_dev_info(dev, "model number mismatch '%s' != '%s'\n",
3879 model[0], model[1]);
3883 if (strcmp(serial[0], serial[1])) {
3884 ata_dev_info(dev, "serial number mismatch '%s' != '%s'\n",
3885 serial[0], serial[1]);
3893 * ata_dev_reread_id - Re-read IDENTIFY data
3894 * @dev: target ATA device
3895 * @readid_flags: read ID flags
3897 * Re-read IDENTIFY page and make sure @dev is still attached to
3901 * Kernel thread context (may sleep)
3904 * 0 on success, negative errno otherwise
3906 int ata_dev_reread_id(struct ata_device *dev, unsigned int readid_flags)
3908 unsigned int class = dev->class;
3909 u16 *id = (void *)dev->link->ap->sector_buf;
3913 rc = ata_dev_read_id(dev, &class, readid_flags, id);
3917 /* is the device still there? */
3918 if (!ata_dev_same_device(dev, class, id))
3921 memcpy(dev->id, id, sizeof(id[0]) * ATA_ID_WORDS);
3926 * ata_dev_revalidate - Revalidate ATA device
3927 * @dev: device to revalidate
3928 * @new_class: new class code
3929 * @readid_flags: read ID flags
3931 * Re-read IDENTIFY page, make sure @dev is still attached to the
3932 * port and reconfigure it according to the new IDENTIFY page.
3935 * Kernel thread context (may sleep)
3938 * 0 on success, negative errno otherwise
3940 int ata_dev_revalidate(struct ata_device *dev, unsigned int new_class,
3941 unsigned int readid_flags)
3943 u64 n_sectors = dev->n_sectors;
3944 u64 n_native_sectors = dev->n_native_sectors;
3947 if (!ata_dev_enabled(dev))
3950 /* fail early if !ATA && !ATAPI to avoid issuing [P]IDENTIFY to PMP */
3951 if (ata_class_enabled(new_class) &&
3952 new_class != ATA_DEV_ATA &&
3953 new_class != ATA_DEV_ATAPI &&
3954 new_class != ATA_DEV_SEMB) {
3955 ata_dev_info(dev, "class mismatch %u != %u\n",
3956 dev->class, new_class);
3962 rc = ata_dev_reread_id(dev, readid_flags);
3966 /* configure device according to the new ID */
3967 rc = ata_dev_configure(dev);
3971 /* verify n_sectors hasn't changed */
3972 if (dev->class != ATA_DEV_ATA || !n_sectors ||
3973 dev->n_sectors == n_sectors)
3976 /* n_sectors has changed */
3977 ata_dev_warn(dev, "n_sectors mismatch %llu != %llu\n",
3978 (unsigned long long)n_sectors,
3979 (unsigned long long)dev->n_sectors);
3982 * Something could have caused HPA to be unlocked
3983 * involuntarily. If n_native_sectors hasn't changed and the
3984 * new size matches it, keep the device.
3986 if (dev->n_native_sectors == n_native_sectors &&
3987 dev->n_sectors > n_sectors && dev->n_sectors == n_native_sectors) {
3989 "new n_sectors matches native, probably "
3990 "late HPA unlock, n_sectors updated\n");
3991 /* use the larger n_sectors */
3996 * Some BIOSes boot w/o HPA but resume w/ HPA locked. Try
3997 * unlocking HPA in those cases.
3999 * https://bugzilla.kernel.org/show_bug.cgi?id=15396
4001 if (dev->n_native_sectors == n_native_sectors &&
4002 dev->n_sectors < n_sectors && n_sectors == n_native_sectors &&
4003 !(dev->horkage & ATA_HORKAGE_BROKEN_HPA)) {
4005 "old n_sectors matches native, probably "
4006 "late HPA lock, will try to unlock HPA\n");
4007 /* try unlocking HPA */
4008 dev->flags |= ATA_DFLAG_UNLOCK_HPA;
4013 /* restore original n_[native_]sectors and fail */
4014 dev->n_native_sectors = n_native_sectors;
4015 dev->n_sectors = n_sectors;
4017 ata_dev_err(dev, "revalidation failed (errno=%d)\n", rc);
4021 struct ata_blacklist_entry {
4022 const char *model_num;
4023 const char *model_rev;
4024 unsigned long horkage;
4027 static const struct ata_blacklist_entry ata_device_blacklist [] = {
4028 /* Devices with DMA related problems under Linux */
4029 { "WDC AC11000H", NULL, ATA_HORKAGE_NODMA },
4030 { "WDC AC22100H", NULL, ATA_HORKAGE_NODMA },
4031 { "WDC AC32500H", NULL, ATA_HORKAGE_NODMA },
4032 { "WDC AC33100H", NULL, ATA_HORKAGE_NODMA },
4033 { "WDC AC31600H", NULL, ATA_HORKAGE_NODMA },
4034 { "WDC AC32100H", "24.09P07", ATA_HORKAGE_NODMA },
4035 { "WDC AC23200L", "21.10N21", ATA_HORKAGE_NODMA },
4036 { "Compaq CRD-8241B", NULL, ATA_HORKAGE_NODMA },
4037 { "CRD-8400B", NULL, ATA_HORKAGE_NODMA },
4038 { "CRD-848[02]B", NULL, ATA_HORKAGE_NODMA },
4039 { "CRD-84", NULL, ATA_HORKAGE_NODMA },
4040 { "SanDisk SDP3B", NULL, ATA_HORKAGE_NODMA },
4041 { "SanDisk SDP3B-64", NULL, ATA_HORKAGE_NODMA },
4042 { "SANYO CD-ROM CRD", NULL, ATA_HORKAGE_NODMA },
4043 { "HITACHI CDR-8", NULL, ATA_HORKAGE_NODMA },
4044 { "HITACHI CDR-8[34]35",NULL, ATA_HORKAGE_NODMA },
4045 { "Toshiba CD-ROM XM-6202B", NULL, ATA_HORKAGE_NODMA },
4046 { "TOSHIBA CD-ROM XM-1702BC", NULL, ATA_HORKAGE_NODMA },
4047 { "CD-532E-A", NULL, ATA_HORKAGE_NODMA },
4048 { "E-IDE CD-ROM CR-840",NULL, ATA_HORKAGE_NODMA },
4049 { "CD-ROM Drive/F5A", NULL, ATA_HORKAGE_NODMA },
4050 { "WPI CDD-820", NULL, ATA_HORKAGE_NODMA },
4051 { "SAMSUNG CD-ROM SC-148C", NULL, ATA_HORKAGE_NODMA },
4052 { "SAMSUNG CD-ROM SC", NULL, ATA_HORKAGE_NODMA },
4053 { "ATAPI CD-ROM DRIVE 40X MAXIMUM",NULL,ATA_HORKAGE_NODMA },
4054 { "_NEC DV5800A", NULL, ATA_HORKAGE_NODMA },
4055 { "SAMSUNG CD-ROM SN-124", "N001", ATA_HORKAGE_NODMA },
4056 { "Seagate STT20000A", NULL, ATA_HORKAGE_NODMA },
4057 /* Odd clown on sil3726/4726 PMPs */
4058 { "Config Disk", NULL, ATA_HORKAGE_DISABLE },
4060 /* Weird ATAPI devices */
4061 { "TORiSAN DVD-ROM DRD-N216", NULL, ATA_HORKAGE_MAX_SEC_128 },
4062 { "QUANTUM DAT DAT72-000", NULL, ATA_HORKAGE_ATAPI_MOD16_DMA },
4063 { "Slimtype DVD A DS8A8SH", NULL, ATA_HORKAGE_MAX_SEC_LBA48 },
4065 /* Devices we expect to fail diagnostics */
4067 /* Devices where NCQ should be avoided */
4069 { "WDC WD740ADFD-00", NULL, ATA_HORKAGE_NONCQ },
4070 { "WDC WD740ADFD-00NLR1", NULL, ATA_HORKAGE_NONCQ, },
4071 /* http://thread.gmane.org/gmane.linux.ide/14907 */
4072 { "FUJITSU MHT2060BH", NULL, ATA_HORKAGE_NONCQ },
4074 { "Maxtor *", "BANC*", ATA_HORKAGE_NONCQ },
4075 { "Maxtor 7V300F0", "VA111630", ATA_HORKAGE_NONCQ },
4076 { "ST380817AS", "3.42", ATA_HORKAGE_NONCQ },
4077 { "ST3160023AS", "3.42", ATA_HORKAGE_NONCQ },
4078 { "OCZ CORE_SSD", "02.10104", ATA_HORKAGE_NONCQ },
4080 /* Seagate NCQ + FLUSH CACHE firmware bug */
4081 { "ST31500341AS", "SD1[5-9]", ATA_HORKAGE_NONCQ |
4082 ATA_HORKAGE_FIRMWARE_WARN },
4084 { "ST31000333AS", "SD1[5-9]", ATA_HORKAGE_NONCQ |
4085 ATA_HORKAGE_FIRMWARE_WARN },
4087 { "ST3640[36]23AS", "SD1[5-9]", ATA_HORKAGE_NONCQ |
4088 ATA_HORKAGE_FIRMWARE_WARN },
4090 { "ST3320[68]13AS", "SD1[5-9]", ATA_HORKAGE_NONCQ |
4091 ATA_HORKAGE_FIRMWARE_WARN },
4093 /* Blacklist entries taken from Silicon Image 3124/3132
4094 Windows driver .inf file - also several Linux problem reports */
4095 { "HTS541060G9SA00", "MB3OC60D", ATA_HORKAGE_NONCQ, },
4096 { "HTS541080G9SA00", "MB4OC60D", ATA_HORKAGE_NONCQ, },
4097 { "HTS541010G9SA00", "MBZOC60D", ATA_HORKAGE_NONCQ, },
4099 /* https://bugzilla.kernel.org/show_bug.cgi?id=15573 */
4100 { "C300-CTFDDAC128MAG", "0001", ATA_HORKAGE_NONCQ, },
4102 /* devices which puke on READ_NATIVE_MAX */
4103 { "HDS724040KLSA80", "KFAOA20N", ATA_HORKAGE_BROKEN_HPA, },
4104 { "WDC WD3200JD-00KLB0", "WD-WCAMR1130137", ATA_HORKAGE_BROKEN_HPA },
4105 { "WDC WD2500JD-00HBB0", "WD-WMAL71490727", ATA_HORKAGE_BROKEN_HPA },
4106 { "MAXTOR 6L080L4", "A93.0500", ATA_HORKAGE_BROKEN_HPA },
4108 /* this one allows HPA unlocking but fails IOs on the area */
4109 { "OCZ-VERTEX", "1.30", ATA_HORKAGE_BROKEN_HPA },
4111 /* Devices which report 1 sector over size HPA */
4112 { "ST340823A", NULL, ATA_HORKAGE_HPA_SIZE, },
4113 { "ST320413A", NULL, ATA_HORKAGE_HPA_SIZE, },
4114 { "ST310211A", NULL, ATA_HORKAGE_HPA_SIZE, },
4116 /* Devices which get the IVB wrong */
4117 { "QUANTUM FIREBALLlct10 05", "A03.0900", ATA_HORKAGE_IVB, },
4118 /* Maybe we should just blacklist TSSTcorp... */
4119 { "TSSTcorp CDDVDW SH-S202[HJN]", "SB0[01]", ATA_HORKAGE_IVB, },
4121 /* Devices that do not need bridging limits applied */
4122 { "MTRON MSP-SATA*", NULL, ATA_HORKAGE_BRIDGE_OK, },
4124 /* Devices which aren't very happy with higher link speeds */
4125 { "WD My Book", NULL, ATA_HORKAGE_1_5_GBPS, },
4126 { "Seagate FreeAgent GoFlex", NULL, ATA_HORKAGE_1_5_GBPS, },
4129 * Devices which choke on SETXFER. Applies only if both the
4130 * device and controller are SATA.
4132 { "PIONEER DVD-RW DVRTD08", NULL, ATA_HORKAGE_NOSETXFER },
4133 { "PIONEER DVD-RW DVR-212D", NULL, ATA_HORKAGE_NOSETXFER },
4134 { "PIONEER DVD-RW DVR-216D", NULL, ATA_HORKAGE_NOSETXFER },
4141 * glob_match - match a text string against a glob-style pattern
4142 * @text: the string to be examined
4143 * @pattern: the glob-style pattern to be matched against
4145 * Either/both of text and pattern can be empty strings.
4147 * Match text against a glob-style pattern, with wildcards and simple sets:
4149 * ? matches any single character.
4150 * * matches any run of characters.
4151 * [xyz] matches a single character from the set: x, y, or z.
4152 * [a-d] matches a single character from the range: a, b, c, or d.
4153 * [a-d0-9] matches a single character from either range.
4155 * The special characters ?, [, -, or *, can be matched using a set, eg. [*]
4156 * Behaviour with malformed patterns is undefined, though generally reasonable.
4158 * Sample patterns: "SD1?", "SD1[0-5]", "*R0", "SD*1?[012]*xx"
4160 * This function uses one level of recursion per '*' in pattern.
4161 * Since it calls _nothing_ else, and has _no_ explicit local variables,
4162 * this will not cause stack problems for any reasonable use here.
4165 * 0 on match, 1 otherwise.
4167 static int glob_match (const char *text, const char *pattern)
4170 /* Match single character or a '?' wildcard */
4171 if (*text == *pattern || *pattern == '?') {
4173 return 0; /* End of both strings: match */
4175 /* Match single char against a '[' bracketed ']' pattern set */
4176 if (!*text || *pattern != '[')
4177 break; /* Not a pattern set */
4178 while (*++pattern && *pattern != ']' && *text != *pattern) {
4179 if (*pattern == '-' && *(pattern - 1) != '[')
4180 if (*text > *(pattern - 1) && *text < *(pattern + 1)) {
4185 if (!*pattern || *pattern == ']')
4186 return 1; /* No match */
4187 while (*pattern && *pattern++ != ']');
4189 } while (*++text && *pattern);
4191 /* Match any run of chars against a '*' wildcard */
4192 if (*pattern == '*') {
4194 return 0; /* Match: avoid recursion at end of pattern */
4195 /* Loop to handle additional pattern chars after the wildcard */
4197 if (glob_match(text, pattern) == 0)
4198 return 0; /* Remainder matched */
4199 ++text; /* Absorb (match) this char and try again */
4202 if (!*text && !*pattern)
4203 return 0; /* End of both strings: match */
4204 return 1; /* No match */
4207 static unsigned long ata_dev_blacklisted(const struct ata_device *dev)
4209 unsigned char model_num[ATA_ID_PROD_LEN + 1];
4210 unsigned char model_rev[ATA_ID_FW_REV_LEN + 1];
4211 const struct ata_blacklist_entry *ad = ata_device_blacklist;
4213 ata_id_c_string(dev->id, model_num, ATA_ID_PROD, sizeof(model_num));
4214 ata_id_c_string(dev->id, model_rev, ATA_ID_FW_REV, sizeof(model_rev));
4216 while (ad->model_num) {
4217 if (!glob_match(model_num, ad->model_num)) {
4218 if (ad->model_rev == NULL)
4220 if (!glob_match(model_rev, ad->model_rev))
4228 static int ata_dma_blacklisted(const struct ata_device *dev)
4230 /* We don't support polling DMA.
4231 * DMA blacklist those ATAPI devices with CDB-intr (and use PIO)
4232 * if the LLDD handles only interrupts in the HSM_ST_LAST state.
4234 if ((dev->link->ap->flags & ATA_FLAG_PIO_POLLING) &&
4235 (dev->flags & ATA_DFLAG_CDB_INTR))
4237 return (dev->horkage & ATA_HORKAGE_NODMA) ? 1 : 0;
4241 * ata_is_40wire - check drive side detection
4244 * Perform drive side detection decoding, allowing for device vendors
4245 * who can't follow the documentation.
4248 static int ata_is_40wire(struct ata_device *dev)
4250 if (dev->horkage & ATA_HORKAGE_IVB)
4251 return ata_drive_40wire_relaxed(dev->id);
4252 return ata_drive_40wire(dev->id);
4256 * cable_is_40wire - 40/80/SATA decider
4257 * @ap: port to consider
4259 * This function encapsulates the policy for speed management
4260 * in one place. At the moment we don't cache the result but
4261 * there is a good case for setting ap->cbl to the result when
4262 * we are called with unknown cables (and figuring out if it
4263 * impacts hotplug at all).
4265 * Return 1 if the cable appears to be 40 wire.
4268 static int cable_is_40wire(struct ata_port *ap)
4270 struct ata_link *link;
4271 struct ata_device *dev;
4273 /* If the controller thinks we are 40 wire, we are. */
4274 if (ap->cbl == ATA_CBL_PATA40)
4277 /* If the controller thinks we are 80 wire, we are. */
4278 if (ap->cbl == ATA_CBL_PATA80 || ap->cbl == ATA_CBL_SATA)
4281 /* If the system is known to be 40 wire short cable (eg
4282 * laptop), then we allow 80 wire modes even if the drive
4285 if (ap->cbl == ATA_CBL_PATA40_SHORT)
4288 /* If the controller doesn't know, we scan.
4290 * Note: We look for all 40 wire detects at this point. Any
4291 * 80 wire detect is taken to be 80 wire cable because
4292 * - in many setups only the one drive (slave if present) will
4293 * give a valid detect
4294 * - if you have a non detect capable drive you don't want it
4295 * to colour the choice
4297 ata_for_each_link(link, ap, EDGE) {
4298 ata_for_each_dev(dev, link, ENABLED) {
4299 if (!ata_is_40wire(dev))
4307 * ata_dev_xfermask - Compute supported xfermask of the given device
4308 * @dev: Device to compute xfermask for
4310 * Compute supported xfermask of @dev and store it in
4311 * dev->*_mask. This function is responsible for applying all
4312 * known limits including host controller limits, device
4318 static void ata_dev_xfermask(struct ata_device *dev)
4320 struct ata_link *link = dev->link;
4321 struct ata_port *ap = link->ap;
4322 struct ata_host *host = ap->host;
4323 unsigned long xfer_mask;
4325 /* controller modes available */
4326 xfer_mask = ata_pack_xfermask(ap->pio_mask,
4327 ap->mwdma_mask, ap->udma_mask);
4329 /* drive modes available */
4330 xfer_mask &= ata_pack_xfermask(dev->pio_mask,
4331 dev->mwdma_mask, dev->udma_mask);
4332 xfer_mask &= ata_id_xfermask(dev->id);
4335 * CFA Advanced TrueIDE timings are not allowed on a shared
4338 if (ata_dev_pair(dev)) {
4339 /* No PIO5 or PIO6 */
4340 xfer_mask &= ~(0x03 << (ATA_SHIFT_PIO + 5));
4341 /* No MWDMA3 or MWDMA 4 */
4342 xfer_mask &= ~(0x03 << (ATA_SHIFT_MWDMA + 3));
4345 if (ata_dma_blacklisted(dev)) {
4346 xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA);
4348 "device is on DMA blacklist, disabling DMA\n");
4351 if ((host->flags & ATA_HOST_SIMPLEX) &&
4352 host->simplex_claimed && host->simplex_claimed != ap) {
4353 xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA);
4355 "simplex DMA is claimed by other device, disabling DMA\n");
4358 if (ap->flags & ATA_FLAG_NO_IORDY)
4359 xfer_mask &= ata_pio_mask_no_iordy(dev);
4361 if (ap->ops->mode_filter)
4362 xfer_mask = ap->ops->mode_filter(dev, xfer_mask);
4364 /* Apply cable rule here. Don't apply it early because when
4365 * we handle hot plug the cable type can itself change.
4366 * Check this last so that we know if the transfer rate was
4367 * solely limited by the cable.
4368 * Unknown or 80 wire cables reported host side are checked
4369 * drive side as well. Cases where we know a 40wire cable
4370 * is used safely for 80 are not checked here.
4372 if (xfer_mask & (0xF8 << ATA_SHIFT_UDMA))
4373 /* UDMA/44 or higher would be available */
4374 if (cable_is_40wire(ap)) {
4376 "limited to UDMA/33 due to 40-wire cable\n");
4377 xfer_mask &= ~(0xF8 << ATA_SHIFT_UDMA);
4380 ata_unpack_xfermask(xfer_mask, &dev->pio_mask,
4381 &dev->mwdma_mask, &dev->udma_mask);
4385 * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command
4386 * @dev: Device to which command will be sent
4388 * Issue SET FEATURES - XFER MODE command to device @dev
4392 * PCI/etc. bus probe sem.
4395 * 0 on success, AC_ERR_* mask otherwise.
4398 static unsigned int ata_dev_set_xfermode(struct ata_device *dev)
4400 struct ata_taskfile tf;
4401 unsigned int err_mask;
4403 /* set up set-features taskfile */
4404 DPRINTK("set features - xfer mode\n");
4406 /* Some controllers and ATAPI devices show flaky interrupt
4407 * behavior after setting xfer mode. Use polling instead.
4409 ata_tf_init(dev, &tf);
4410 tf.command = ATA_CMD_SET_FEATURES;
4411 tf.feature = SETFEATURES_XFER;
4412 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_POLLING;
4413 tf.protocol = ATA_PROT_NODATA;
4414 /* If we are using IORDY we must send the mode setting command */
4415 if (ata_pio_need_iordy(dev))
4416 tf.nsect = dev->xfer_mode;
4417 /* If the device has IORDY and the controller does not - turn it off */
4418 else if (ata_id_has_iordy(dev->id))
4420 else /* In the ancient relic department - skip all of this */
4423 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
4425 DPRINTK("EXIT, err_mask=%x\n", err_mask);
4430 * ata_dev_set_feature - Issue SET FEATURES - SATA FEATURES
4431 * @dev: Device to which command will be sent
4432 * @enable: Whether to enable or disable the feature
4433 * @feature: The sector count represents the feature to set
4435 * Issue SET FEATURES - SATA FEATURES command to device @dev
4436 * on port @ap with sector count
4439 * PCI/etc. bus probe sem.
4442 * 0 on success, AC_ERR_* mask otherwise.
4444 unsigned int ata_dev_set_feature(struct ata_device *dev, u8 enable, u8 feature)
4446 struct ata_taskfile tf;
4447 unsigned int err_mask;
4449 /* set up set-features taskfile */
4450 DPRINTK("set features - SATA features\n");
4452 ata_tf_init(dev, &tf);
4453 tf.command = ATA_CMD_SET_FEATURES;
4454 tf.feature = enable;
4455 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
4456 tf.protocol = ATA_PROT_NODATA;
4459 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
4461 DPRINTK("EXIT, err_mask=%x\n", err_mask);
4466 * ata_dev_init_params - Issue INIT DEV PARAMS command
4467 * @dev: Device to which command will be sent
4468 * @heads: Number of heads (taskfile parameter)
4469 * @sectors: Number of sectors (taskfile parameter)
4472 * Kernel thread context (may sleep)
4475 * 0 on success, AC_ERR_* mask otherwise.
4477 static unsigned int ata_dev_init_params(struct ata_device *dev,
4478 u16 heads, u16 sectors)
4480 struct ata_taskfile tf;
4481 unsigned int err_mask;
4483 /* Number of sectors per track 1-255. Number of heads 1-16 */
4484 if (sectors < 1 || sectors > 255 || heads < 1 || heads > 16)
4485 return AC_ERR_INVALID;
4487 /* set up init dev params taskfile */
4488 DPRINTK("init dev params \n");
4490 ata_tf_init(dev, &tf);
4491 tf.command = ATA_CMD_INIT_DEV_PARAMS;
4492 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
4493 tf.protocol = ATA_PROT_NODATA;
4495 tf.device |= (heads - 1) & 0x0f; /* max head = num. of heads - 1 */
4497 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
4498 /* A clean abort indicates an original or just out of spec drive
4499 and we should continue as we issue the setup based on the
4500 drive reported working geometry */
4501 if (err_mask == AC_ERR_DEV && (tf.feature & ATA_ABORTED))
4504 DPRINTK("EXIT, err_mask=%x\n", err_mask);
4509 * ata_sg_clean - Unmap DMA memory associated with command
4510 * @qc: Command containing DMA memory to be released
4512 * Unmap all mapped DMA memory associated with this command.
4515 * spin_lock_irqsave(host lock)
4517 void ata_sg_clean(struct ata_queued_cmd *qc)
4519 struct ata_port *ap = qc->ap;
4520 struct scatterlist *sg = qc->sg;
4521 int dir = qc->dma_dir;
4523 WARN_ON_ONCE(sg == NULL);
4525 VPRINTK("unmapping %u sg elements\n", qc->n_elem);
4528 dma_unmap_sg(ap->dev, sg, qc->orig_n_elem, dir);
4530 qc->flags &= ~ATA_QCFLAG_DMAMAP;
4535 * atapi_check_dma - Check whether ATAPI DMA can be supported
4536 * @qc: Metadata associated with taskfile to check
4538 * Allow low-level driver to filter ATA PACKET commands, returning
4539 * a status indicating whether or not it is OK to use DMA for the
4540 * supplied PACKET command.
4543 * spin_lock_irqsave(host lock)
4545 * RETURNS: 0 when ATAPI DMA can be used
4548 int atapi_check_dma(struct ata_queued_cmd *qc)
4550 struct ata_port *ap = qc->ap;
4552 /* Don't allow DMA if it isn't multiple of 16 bytes. Quite a
4553 * few ATAPI devices choke on such DMA requests.
4555 if (!(qc->dev->horkage & ATA_HORKAGE_ATAPI_MOD16_DMA) &&
4556 unlikely(qc->nbytes & 15))
4559 if (ap->ops->check_atapi_dma)
4560 return ap->ops->check_atapi_dma(qc);
4566 * ata_std_qc_defer - Check whether a qc needs to be deferred
4567 * @qc: ATA command in question
4569 * Non-NCQ commands cannot run with any other command, NCQ or
4570 * not. As upper layer only knows the queue depth, we are
4571 * responsible for maintaining exclusion. This function checks
4572 * whether a new command @qc can be issued.
4575 * spin_lock_irqsave(host lock)
4578 * ATA_DEFER_* if deferring is needed, 0 otherwise.
4580 int ata_std_qc_defer(struct ata_queued_cmd *qc)
4582 struct ata_link *link = qc->dev->link;
4584 if (qc->tf.protocol == ATA_PROT_NCQ) {
4585 if (!ata_tag_valid(link->active_tag))
4588 if (!ata_tag_valid(link->active_tag) && !link->sactive)
4592 return ATA_DEFER_LINK;
4595 void ata_noop_qc_prep(struct ata_queued_cmd *qc) { }
4598 * ata_sg_init - Associate command with scatter-gather table.
4599 * @qc: Command to be associated
4600 * @sg: Scatter-gather table.
4601 * @n_elem: Number of elements in s/g table.
4603 * Initialize the data-related elements of queued_cmd @qc
4604 * to point to a scatter-gather table @sg, containing @n_elem
4608 * spin_lock_irqsave(host lock)
4610 void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
4611 unsigned int n_elem)
4614 qc->n_elem = n_elem;
4619 * ata_sg_setup - DMA-map the scatter-gather table associated with a command.
4620 * @qc: Command with scatter-gather table to be mapped.
4622 * DMA-map the scatter-gather table associated with queued_cmd @qc.
4625 * spin_lock_irqsave(host lock)
4628 * Zero on success, negative on error.
4631 static int ata_sg_setup(struct ata_queued_cmd *qc)
4633 struct ata_port *ap = qc->ap;
4634 unsigned int n_elem;
4636 VPRINTK("ENTER, ata%u\n", ap->print_id);
4638 n_elem = dma_map_sg(ap->dev, qc->sg, qc->n_elem, qc->dma_dir);
4642 DPRINTK("%d sg elements mapped\n", n_elem);
4643 qc->orig_n_elem = qc->n_elem;
4644 qc->n_elem = n_elem;
4645 qc->flags |= ATA_QCFLAG_DMAMAP;
4651 * swap_buf_le16 - swap halves of 16-bit words in place
4652 * @buf: Buffer to swap
4653 * @buf_words: Number of 16-bit words in buffer.
4655 * Swap halves of 16-bit words if needed to convert from
4656 * little-endian byte order to native cpu byte order, or
4660 * Inherited from caller.
4662 void swap_buf_le16(u16 *buf, unsigned int buf_words)
4667 for (i = 0; i < buf_words; i++)
4668 buf[i] = le16_to_cpu(buf[i]);
4669 #endif /* __BIG_ENDIAN */
4673 * ata_qc_new - Request an available ATA command, for queueing
4680 static struct ata_queued_cmd *ata_qc_new(struct ata_port *ap)
4682 struct ata_queued_cmd *qc = NULL;
4685 /* no command while frozen */
4686 if (unlikely(ap->pflags & ATA_PFLAG_FROZEN))
4689 /* the last tag is reserved for internal command. */
4690 for (i = 0; i < ATA_MAX_QUEUE - 1; i++)
4691 if (!test_and_set_bit(i, &ap->qc_allocated)) {
4692 qc = __ata_qc_from_tag(ap, i);
4703 * ata_qc_new_init - Request an available ATA command, and initialize it
4704 * @dev: Device from whom we request an available command structure
4710 struct ata_queued_cmd *ata_qc_new_init(struct ata_device *dev)
4712 struct ata_port *ap = dev->link->ap;
4713 struct ata_queued_cmd *qc;
4715 qc = ata_qc_new(ap);
4728 * ata_qc_free - free unused ata_queued_cmd
4729 * @qc: Command to complete
4731 * Designed to free unused ata_queued_cmd object
4732 * in case something prevents using it.
4735 * spin_lock_irqsave(host lock)
4737 void ata_qc_free(struct ata_queued_cmd *qc)
4739 struct ata_port *ap;
4742 WARN_ON_ONCE(qc == NULL); /* ata_qc_from_tag _might_ return NULL */
4747 if (likely(ata_tag_valid(tag))) {
4748 qc->tag = ATA_TAG_POISON;
4749 clear_bit(tag, &ap->qc_allocated);
4753 void __ata_qc_complete(struct ata_queued_cmd *qc)
4755 struct ata_port *ap;
4756 struct ata_link *link;
4758 WARN_ON_ONCE(qc == NULL); /* ata_qc_from_tag _might_ return NULL */
4759 WARN_ON_ONCE(!(qc->flags & ATA_QCFLAG_ACTIVE));
4761 link = qc->dev->link;
4763 if (likely(qc->flags & ATA_QCFLAG_DMAMAP))
4766 /* command should be marked inactive atomically with qc completion */
4767 if (qc->tf.protocol == ATA_PROT_NCQ) {
4768 link->sactive &= ~(1 << qc->tag);
4770 ap->nr_active_links--;
4772 link->active_tag = ATA_TAG_POISON;
4773 ap->nr_active_links--;
4776 /* clear exclusive status */
4777 if (unlikely(qc->flags & ATA_QCFLAG_CLEAR_EXCL &&
4778 ap->excl_link == link))
4779 ap->excl_link = NULL;
4781 /* atapi: mark qc as inactive to prevent the interrupt handler
4782 * from completing the command twice later, before the error handler
4783 * is called. (when rc != 0 and atapi request sense is needed)
4785 qc->flags &= ~ATA_QCFLAG_ACTIVE;
4786 ap->qc_active &= ~(1 << qc->tag);
4788 /* call completion callback */
4789 qc->complete_fn(qc);
4792 static void fill_result_tf(struct ata_queued_cmd *qc)
4794 struct ata_port *ap = qc->ap;
4796 qc->result_tf.flags = qc->tf.flags;
4797 ap->ops->qc_fill_rtf(qc);
4800 static void ata_verify_xfer(struct ata_queued_cmd *qc)
4802 struct ata_device *dev = qc->dev;
4804 if (ata_is_nodata(qc->tf.protocol))
4807 if ((dev->mwdma_mask || dev->udma_mask) && ata_is_pio(qc->tf.protocol))
4810 dev->flags &= ~ATA_DFLAG_DUBIOUS_XFER;
4814 * ata_qc_complete - Complete an active ATA command
4815 * @qc: Command to complete
4817 * Indicate to the mid and upper layers that an ATA command has
4818 * completed, with either an ok or not-ok status.
4820 * Refrain from calling this function multiple times when
4821 * successfully completing multiple NCQ commands.
4822 * ata_qc_complete_multiple() should be used instead, which will
4823 * properly update IRQ expect state.
4826 * spin_lock_irqsave(host lock)
4828 void ata_qc_complete(struct ata_queued_cmd *qc)
4830 struct ata_port *ap = qc->ap;
4832 /* XXX: New EH and old EH use different mechanisms to
4833 * synchronize EH with regular execution path.
4835 * In new EH, a failed qc is marked with ATA_QCFLAG_FAILED.
4836 * Normal execution path is responsible for not accessing a
4837 * failed qc. libata core enforces the rule by returning NULL
4838 * from ata_qc_from_tag() for failed qcs.
4840 * Old EH depends on ata_qc_complete() nullifying completion
4841 * requests if ATA_QCFLAG_EH_SCHEDULED is set. Old EH does
4842 * not synchronize with interrupt handler. Only PIO task is
4845 if (ap->ops->error_handler) {
4846 struct ata_device *dev = qc->dev;
4847 struct ata_eh_info *ehi = &dev->link->eh_info;
4849 if (unlikely(qc->err_mask))
4850 qc->flags |= ATA_QCFLAG_FAILED;
4853 * Finish internal commands without any further processing
4854 * and always with the result TF filled.
4856 if (unlikely(ata_tag_internal(qc->tag))) {
4858 __ata_qc_complete(qc);
4863 * Non-internal qc has failed. Fill the result TF and
4866 if (unlikely(qc->flags & ATA_QCFLAG_FAILED)) {
4868 ata_qc_schedule_eh(qc);
4872 WARN_ON_ONCE(ap->pflags & ATA_PFLAG_FROZEN);
4874 /* read result TF if requested */
4875 if (qc->flags & ATA_QCFLAG_RESULT_TF)
4878 /* Some commands need post-processing after successful
4881 switch (qc->tf.command) {
4882 case ATA_CMD_SET_FEATURES:
4883 if (qc->tf.feature != SETFEATURES_WC_ON &&
4884 qc->tf.feature != SETFEATURES_WC_OFF)
4887 case ATA_CMD_INIT_DEV_PARAMS: /* CHS translation changed */
4888 case ATA_CMD_SET_MULTI: /* multi_count changed */
4889 /* revalidate device */
4890 ehi->dev_action[dev->devno] |= ATA_EH_REVALIDATE;
4891 ata_port_schedule_eh(ap);
4895 dev->flags |= ATA_DFLAG_SLEEPING;
4899 if (unlikely(dev->flags & ATA_DFLAG_DUBIOUS_XFER))
4900 ata_verify_xfer(qc);
4902 __ata_qc_complete(qc);
4904 if (qc->flags & ATA_QCFLAG_EH_SCHEDULED)
4907 /* read result TF if failed or requested */
4908 if (qc->err_mask || qc->flags & ATA_QCFLAG_RESULT_TF)
4911 __ata_qc_complete(qc);
4916 * ata_qc_complete_multiple - Complete multiple qcs successfully
4917 * @ap: port in question
4918 * @qc_active: new qc_active mask
4920 * Complete in-flight commands. This functions is meant to be
4921 * called from low-level driver's interrupt routine to complete
4922 * requests normally. ap->qc_active and @qc_active is compared
4923 * and commands are completed accordingly.
4925 * Always use this function when completing multiple NCQ commands
4926 * from IRQ handlers instead of calling ata_qc_complete()
4927 * multiple times to keep IRQ expect status properly in sync.
4930 * spin_lock_irqsave(host lock)
4933 * Number of completed commands on success, -errno otherwise.
4935 int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active)
4940 done_mask = ap->qc_active ^ qc_active;
4942 if (unlikely(done_mask & qc_active)) {
4943 ata_port_err(ap, "illegal qc_active transition (%08x->%08x)\n",
4944 ap->qc_active, qc_active);
4949 struct ata_queued_cmd *qc;
4950 unsigned int tag = __ffs(done_mask);
4952 qc = ata_qc_from_tag(ap, tag);
4954 ata_qc_complete(qc);
4957 done_mask &= ~(1 << tag);
4964 * ata_qc_issue - issue taskfile to device
4965 * @qc: command to issue to device
4967 * Prepare an ATA command to submission to device.
4968 * This includes mapping the data into a DMA-able
4969 * area, filling in the S/G table, and finally
4970 * writing the taskfile to hardware, starting the command.
4973 * spin_lock_irqsave(host lock)
4975 void ata_qc_issue(struct ata_queued_cmd *qc)
4977 struct ata_port *ap = qc->ap;
4978 struct ata_link *link = qc->dev->link;
4979 u8 prot = qc->tf.protocol;
4981 /* Make sure only one non-NCQ command is outstanding. The
4982 * check is skipped for old EH because it reuses active qc to
4983 * request ATAPI sense.
4985 WARN_ON_ONCE(ap->ops->error_handler && ata_tag_valid(link->active_tag));
4987 if (ata_is_ncq(prot)) {
4988 WARN_ON_ONCE(link->sactive & (1 << qc->tag));
4991 ap->nr_active_links++;
4992 link->sactive |= 1 << qc->tag;
4994 WARN_ON_ONCE(link->sactive);
4996 ap->nr_active_links++;
4997 link->active_tag = qc->tag;
5000 qc->flags |= ATA_QCFLAG_ACTIVE;
5001 ap->qc_active |= 1 << qc->tag;
5004 * We guarantee to LLDs that they will have at least one
5005 * non-zero sg if the command is a data command.
5007 if (WARN_ON_ONCE(ata_is_data(prot) &&
5008 (!qc->sg || !qc->n_elem || !qc->nbytes)))
5011 if (ata_is_dma(prot) || (ata_is_pio(prot) &&
5012 (ap->flags & ATA_FLAG_PIO_DMA)))
5013 if (ata_sg_setup(qc))
5016 /* if device is sleeping, schedule reset and abort the link */
5017 if (unlikely(qc->dev->flags & ATA_DFLAG_SLEEPING)) {
5018 link->eh_info.action |= ATA_EH_RESET;
5019 ata_ehi_push_desc(&link->eh_info, "waking up from sleep");
5020 ata_link_abort(link);
5024 ap->ops->qc_prep(qc);
5026 qc->err_mask |= ap->ops->qc_issue(qc);
5027 if (unlikely(qc->err_mask))
5032 qc->err_mask |= AC_ERR_SYSTEM;
5034 ata_qc_complete(qc);
5038 * sata_scr_valid - test whether SCRs are accessible
5039 * @link: ATA link to test SCR accessibility for
5041 * Test whether SCRs are accessible for @link.
5047 * 1 if SCRs are accessible, 0 otherwise.
5049 int sata_scr_valid(struct ata_link *link)
5051 struct ata_port *ap = link->ap;
5053 return (ap->flags & ATA_FLAG_SATA) && ap->ops->scr_read;
5057 * sata_scr_read - read SCR register of the specified port
5058 * @link: ATA link to read SCR for
5060 * @val: Place to store read value
5062 * Read SCR register @reg of @link into *@val. This function is
5063 * guaranteed to succeed if @link is ap->link, the cable type of
5064 * the port is SATA and the port implements ->scr_read.
5067 * None if @link is ap->link. Kernel thread context otherwise.
5070 * 0 on success, negative errno on failure.
5072 int sata_scr_read(struct ata_link *link, int reg, u32 *val)
5074 if (ata_is_host_link(link)) {
5075 if (sata_scr_valid(link))
5076 return link->ap->ops->scr_read(link, reg, val);
5080 return sata_pmp_scr_read(link, reg, val);
5084 * sata_scr_write - write SCR register of the specified port
5085 * @link: ATA link to write SCR for
5086 * @reg: SCR to write
5087 * @val: value to write
5089 * Write @val to SCR register @reg of @link. This function is
5090 * guaranteed to succeed if @link is ap->link, the cable type of
5091 * the port is SATA and the port implements ->scr_read.
5094 * None if @link is ap->link. Kernel thread context otherwise.
5097 * 0 on success, negative errno on failure.
5099 int sata_scr_write(struct ata_link *link, int reg, u32 val)
5101 if (ata_is_host_link(link)) {
5102 if (sata_scr_valid(link))
5103 return link->ap->ops->scr_write(link, reg, val);
5107 return sata_pmp_scr_write(link, reg, val);
5111 * sata_scr_write_flush - write SCR register of the specified port and flush
5112 * @link: ATA link to write SCR for
5113 * @reg: SCR to write
5114 * @val: value to write
5116 * This function is identical to sata_scr_write() except that this
5117 * function performs flush after writing to the register.
5120 * None if @link is ap->link. Kernel thread context otherwise.
5123 * 0 on success, negative errno on failure.
5125 int sata_scr_write_flush(struct ata_link *link, int reg, u32 val)
5127 if (ata_is_host_link(link)) {
5130 if (sata_scr_valid(link)) {
5131 rc = link->ap->ops->scr_write(link, reg, val);
5133 rc = link->ap->ops->scr_read(link, reg, &val);
5139 return sata_pmp_scr_write(link, reg, val);
5143 * ata_phys_link_online - test whether the given link is online
5144 * @link: ATA link to test
5146 * Test whether @link is online. Note that this function returns
5147 * 0 if online status of @link cannot be obtained, so
5148 * ata_link_online(link) != !ata_link_offline(link).
5154 * True if the port online status is available and online.
5156 bool ata_phys_link_online(struct ata_link *link)
5160 if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0 &&
5161 ata_sstatus_online(sstatus))
5167 * ata_phys_link_offline - test whether the given link is offline
5168 * @link: ATA link to test
5170 * Test whether @link is offline. Note that this function
5171 * returns 0 if offline status of @link cannot be obtained, so
5172 * ata_link_online(link) != !ata_link_offline(link).
5178 * True if the port offline status is available and offline.
5180 bool ata_phys_link_offline(struct ata_link *link)
5184 if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0 &&
5185 !ata_sstatus_online(sstatus))
5191 * ata_link_online - test whether the given link is online
5192 * @link: ATA link to test
5194 * Test whether @link is online. This is identical to
5195 * ata_phys_link_online() when there's no slave link. When
5196 * there's a slave link, this function should only be called on
5197 * the master link and will return true if any of M/S links is
5204 * True if the port online status is available and online.
5206 bool ata_link_online(struct ata_link *link)
5208 struct ata_link *slave = link->ap->slave_link;
5210 WARN_ON(link == slave); /* shouldn't be called on slave link */
5212 return ata_phys_link_online(link) ||
5213 (slave && ata_phys_link_online(slave));
5217 * ata_link_offline - test whether the given link is offline
5218 * @link: ATA link to test
5220 * Test whether @link is offline. This is identical to
5221 * ata_phys_link_offline() when there's no slave link. When
5222 * there's a slave link, this function should only be called on
5223 * the master link and will return true if both M/S links are
5230 * True if the port offline status is available and offline.
5232 bool ata_link_offline(struct ata_link *link)
5234 struct ata_link *slave = link->ap->slave_link;
5236 WARN_ON(link == slave); /* shouldn't be called on slave link */
5238 return ata_phys_link_offline(link) &&
5239 (!slave || ata_phys_link_offline(slave));
5243 static int ata_host_request_pm(struct ata_host *host, pm_message_t mesg,
5244 unsigned int action, unsigned int ehi_flags,
5247 unsigned long flags;
5250 for (i = 0; i < host->n_ports; i++) {
5251 struct ata_port *ap = host->ports[i];
5252 struct ata_link *link;
5254 /* Previous resume operation might still be in
5255 * progress. Wait for PM_PENDING to clear.
5257 if (ap->pflags & ATA_PFLAG_PM_PENDING) {
5258 ata_port_wait_eh(ap);
5259 WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING);
5262 /* request PM ops to EH */
5263 spin_lock_irqsave(ap->lock, flags);
5268 ap->pm_result = &rc;
5271 ap->pflags |= ATA_PFLAG_PM_PENDING;
5272 ata_for_each_link(link, ap, HOST_FIRST) {
5273 link->eh_info.action |= action;
5274 link->eh_info.flags |= ehi_flags;
5277 ata_port_schedule_eh(ap);
5279 spin_unlock_irqrestore(ap->lock, flags);
5281 /* wait and check result */
5283 ata_port_wait_eh(ap);
5284 WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING);
5294 * ata_host_suspend - suspend host
5295 * @host: host to suspend
5298 * Suspend @host. Actual operation is performed by EH. This
5299 * function requests EH to perform PM operations and waits for EH
5303 * Kernel thread context (may sleep).
5306 * 0 on success, -errno on failure.
5308 int ata_host_suspend(struct ata_host *host, pm_message_t mesg)
5310 unsigned int ehi_flags = ATA_EHI_QUIET;
5314 * On some hardware, device fails to respond after spun down
5315 * for suspend. As the device won't be used before being
5316 * resumed, we don't need to touch the device. Ask EH to skip
5317 * the usual stuff and proceed directly to suspend.
5319 * http://thread.gmane.org/gmane.linux.ide/46764
5321 if (mesg.event == PM_EVENT_SUSPEND)
5322 ehi_flags |= ATA_EHI_NO_AUTOPSY | ATA_EHI_NO_RECOVERY;
5324 rc = ata_host_request_pm(host, mesg, 0, ehi_flags, 1);
5326 host->dev->power.power_state = mesg;
5331 * ata_host_resume - resume host
5332 * @host: host to resume
5334 * Resume @host. Actual operation is performed by EH. This
5335 * function requests EH to perform PM operations and returns.
5336 * Note that all resume operations are performed parallelly.
5339 * Kernel thread context (may sleep).
5341 void ata_host_resume(struct ata_host *host)
5343 ata_host_request_pm(host, PMSG_ON, ATA_EH_RESET,
5344 ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET, 0);
5345 host->dev->power.power_state = PMSG_ON;
5350 * ata_dev_init - Initialize an ata_device structure
5351 * @dev: Device structure to initialize
5353 * Initialize @dev in preparation for probing.
5356 * Inherited from caller.
5358 void ata_dev_init(struct ata_device *dev)
5360 struct ata_link *link = ata_dev_phys_link(dev);
5361 struct ata_port *ap = link->ap;
5362 unsigned long flags;
5364 /* SATA spd limit is bound to the attached device, reset together */
5365 link->sata_spd_limit = link->hw_sata_spd_limit;
5368 /* High bits of dev->flags are used to record warm plug
5369 * requests which occur asynchronously. Synchronize using
5372 spin_lock_irqsave(ap->lock, flags);
5373 dev->flags &= ~ATA_DFLAG_INIT_MASK;
5375 spin_unlock_irqrestore(ap->lock, flags);
5377 memset((void *)dev + ATA_DEVICE_CLEAR_BEGIN, 0,
5378 ATA_DEVICE_CLEAR_END - ATA_DEVICE_CLEAR_BEGIN);
5379 dev->pio_mask = UINT_MAX;
5380 dev->mwdma_mask = UINT_MAX;
5381 dev->udma_mask = UINT_MAX;
5385 * ata_link_init - Initialize an ata_link structure
5386 * @ap: ATA port link is attached to
5387 * @link: Link structure to initialize
5388 * @pmp: Port multiplier port number
5393 * Kernel thread context (may sleep)
5395 void ata_link_init(struct ata_port *ap, struct ata_link *link, int pmp)
5399 /* clear everything except for devices */
5400 memset((void *)link + ATA_LINK_CLEAR_BEGIN, 0,
5401 ATA_LINK_CLEAR_END - ATA_LINK_CLEAR_BEGIN);
5405 link->active_tag = ATA_TAG_POISON;
5406 link->hw_sata_spd_limit = UINT_MAX;
5408 /* can't use iterator, ap isn't initialized yet */
5409 for (i = 0; i < ATA_MAX_DEVICES; i++) {
5410 struct ata_device *dev = &link->device[i];
5413 dev->devno = dev - link->device;
5414 #ifdef CONFIG_ATA_ACPI
5415 dev->gtf_filter = ata_acpi_gtf_filter;
5422 * sata_link_init_spd - Initialize link->sata_spd_limit
5423 * @link: Link to configure sata_spd_limit for
5425 * Initialize @link->[hw_]sata_spd_limit to the currently
5429 * Kernel thread context (may sleep).
5432 * 0 on success, -errno on failure.
5434 int sata_link_init_spd(struct ata_link *link)
5439 rc = sata_scr_read(link, SCR_CONTROL, &link->saved_scontrol);
5443 spd = (link->saved_scontrol >> 4) & 0xf;
5445 link->hw_sata_spd_limit &= (1 << spd) - 1;
5447 ata_force_link_limits(link);
5449 link->sata_spd_limit = link->hw_sata_spd_limit;
5455 * ata_port_alloc - allocate and initialize basic ATA port resources
5456 * @host: ATA host this allocated port belongs to
5458 * Allocate and initialize basic ATA port resources.
5461 * Allocate ATA port on success, NULL on failure.
5464 * Inherited from calling layer (may sleep).
5466 struct ata_port *ata_port_alloc(struct ata_host *host)
5468 struct ata_port *ap;
5472 ap = kzalloc(sizeof(*ap), GFP_KERNEL);
5476 ap->pflags |= ATA_PFLAG_INITIALIZING | ATA_PFLAG_FROZEN;
5477 ap->lock = &host->lock;
5480 ap->dev = host->dev;
5482 #if defined(ATA_VERBOSE_DEBUG)
5483 /* turn on all debugging levels */
5484 ap->msg_enable = 0x00FF;
5485 #elif defined(ATA_DEBUG)
5486 ap->msg_enable = ATA_MSG_DRV | ATA_MSG_INFO | ATA_MSG_CTL | ATA_MSG_WARN | ATA_MSG_ERR;
5488 ap->msg_enable = ATA_MSG_DRV | ATA_MSG_ERR | ATA_MSG_WARN;
5491 mutex_init(&ap->scsi_scan_mutex);
5492 INIT_DELAYED_WORK(&ap->hotplug_task, ata_scsi_hotplug);
5493 INIT_WORK(&ap->scsi_rescan_task, ata_scsi_dev_rescan);
5494 INIT_LIST_HEAD(&ap->eh_done_q);
5495 init_waitqueue_head(&ap->eh_wait_q);
5496 init_completion(&ap->park_req_pending);
5497 init_timer_deferrable(&ap->fastdrain_timer);
5498 ap->fastdrain_timer.function = ata_eh_fastdrain_timerfn;
5499 ap->fastdrain_timer.data = (unsigned long)ap;
5501 ap->cbl = ATA_CBL_NONE;
5503 ata_link_init(ap, &ap->link, 0);
5506 ap->stats.unhandled_irq = 1;
5507 ap->stats.idle_irq = 1;
5509 ata_sff_port_init(ap);
5514 static void ata_host_release(struct device *gendev, void *res)
5516 struct ata_host *host = dev_get_drvdata(gendev);
5519 for (i = 0; i < host->n_ports; i++) {
5520 struct ata_port *ap = host->ports[i];
5526 scsi_host_put(ap->scsi_host);
5528 kfree(ap->pmp_link);
5529 kfree(ap->slave_link);
5531 host->ports[i] = NULL;
5534 dev_set_drvdata(gendev, NULL);
5538 * ata_host_alloc - allocate and init basic ATA host resources
5539 * @dev: generic device this host is associated with
5540 * @max_ports: maximum number of ATA ports associated with this host
5542 * Allocate and initialize basic ATA host resources. LLD calls
5543 * this function to allocate a host, initializes it fully and
5544 * attaches it using ata_host_register().
5546 * @max_ports ports are allocated and host->n_ports is
5547 * initialized to @max_ports. The caller is allowed to decrease
5548 * host->n_ports before calling ata_host_register(). The unused
5549 * ports will be automatically freed on registration.
5552 * Allocate ATA host on success, NULL on failure.
5555 * Inherited from calling layer (may sleep).
5557 struct ata_host *ata_host_alloc(struct device *dev, int max_ports)
5559 struct ata_host *host;
5565 if (!devres_open_group(dev, NULL, GFP_KERNEL))
5568 /* alloc a container for our list of ATA ports (buses) */
5569 sz = sizeof(struct ata_host) + (max_ports + 1) * sizeof(void *);
5570 /* alloc a container for our list of ATA ports (buses) */
5571 host = devres_alloc(ata_host_release, sz, GFP_KERNEL);
5575 devres_add(dev, host);
5576 dev_set_drvdata(dev, host);
5578 spin_lock_init(&host->lock);
5579 mutex_init(&host->eh_mutex);
5581 host->n_ports = max_ports;
5583 /* allocate ports bound to this host */
5584 for (i = 0; i < max_ports; i++) {
5585 struct ata_port *ap;
5587 ap = ata_port_alloc(host);
5592 host->ports[i] = ap;
5595 devres_remove_group(dev, NULL);
5599 devres_release_group(dev, NULL);
5604 * ata_host_alloc_pinfo - alloc host and init with port_info array
5605 * @dev: generic device this host is associated with
5606 * @ppi: array of ATA port_info to initialize host with
5607 * @n_ports: number of ATA ports attached to this host
5609 * Allocate ATA host and initialize with info from @ppi. If NULL
5610 * terminated, @ppi may contain fewer entries than @n_ports. The
5611 * last entry will be used for the remaining ports.
5614 * Allocate ATA host on success, NULL on failure.
5617 * Inherited from calling layer (may sleep).
5619 struct ata_host *ata_host_alloc_pinfo(struct device *dev,
5620 const struct ata_port_info * const * ppi,
5623 const struct ata_port_info *pi;
5624 struct ata_host *host;
5627 host = ata_host_alloc(dev, n_ports);
5631 for (i = 0, j = 0, pi = NULL; i < host->n_ports; i++) {
5632 struct ata_port *ap = host->ports[i];
5637 ap->pio_mask = pi->pio_mask;
5638 ap->mwdma_mask = pi->mwdma_mask;
5639 ap->udma_mask = pi->udma_mask;
5640 ap->flags |= pi->flags;
5641 ap->link.flags |= pi->link_flags;
5642 ap->ops = pi->port_ops;
5644 if (!host->ops && (pi->port_ops != &ata_dummy_port_ops))
5645 host->ops = pi->port_ops;
5652 * ata_slave_link_init - initialize slave link
5653 * @ap: port to initialize slave link for
5655 * Create and initialize slave link for @ap. This enables slave
5656 * link handling on the port.
5658 * In libata, a port contains links and a link contains devices.
5659 * There is single host link but if a PMP is attached to it,
5660 * there can be multiple fan-out links. On SATA, there's usually
5661 * a single device connected to a link but PATA and SATA
5662 * controllers emulating TF based interface can have two - master
5665 * However, there are a few controllers which don't fit into this
5666 * abstraction too well - SATA controllers which emulate TF
5667 * interface with both master and slave devices but also have
5668 * separate SCR register sets for each device. These controllers
5669 * need separate links for physical link handling
5670 * (e.g. onlineness, link speed) but should be treated like a
5671 * traditional M/S controller for everything else (e.g. command
5672 * issue, softreset).
5674 * slave_link is libata's way of handling this class of
5675 * controllers without impacting core layer too much. For
5676 * anything other than physical link handling, the default host
5677 * link is used for both master and slave. For physical link
5678 * handling, separate @ap->slave_link is used. All dirty details
5679 * are implemented inside libata core layer. From LLD's POV, the
5680 * only difference is that prereset, hardreset and postreset are
5681 * called once more for the slave link, so the reset sequence
5682 * looks like the following.
5684 * prereset(M) -> prereset(S) -> hardreset(M) -> hardreset(S) ->
5685 * softreset(M) -> postreset(M) -> postreset(S)
5687 * Note that softreset is called only for the master. Softreset
5688 * resets both M/S by definition, so SRST on master should handle
5689 * both (the standard method will work just fine).
5692 * Should be called before host is registered.
5695 * 0 on success, -errno on failure.
5697 int ata_slave_link_init(struct ata_port *ap)
5699 struct ata_link *link;
5701 WARN_ON(ap->slave_link);
5702 WARN_ON(ap->flags & ATA_FLAG_PMP);
5704 link = kzalloc(sizeof(*link), GFP_KERNEL);
5708 ata_link_init(ap, link, 1);
5709 ap->slave_link = link;
5713 static void ata_host_stop(struct device *gendev, void *res)
5715 struct ata_host *host = dev_get_drvdata(gendev);
5718 WARN_ON(!(host->flags & ATA_HOST_STARTED));
5720 for (i = 0; i < host->n_ports; i++) {
5721 struct ata_port *ap = host->ports[i];
5723 if (ap->ops->port_stop)
5724 ap->ops->port_stop(ap);
5727 if (host->ops->host_stop)
5728 host->ops->host_stop(host);
5732 * ata_finalize_port_ops - finalize ata_port_operations
5733 * @ops: ata_port_operations to finalize
5735 * An ata_port_operations can inherit from another ops and that
5736 * ops can again inherit from another. This can go on as many
5737 * times as necessary as long as there is no loop in the
5738 * inheritance chain.
5740 * Ops tables are finalized when the host is started. NULL or
5741 * unspecified entries are inherited from the closet ancestor
5742 * which has the method and the entry is populated with it.
5743 * After finalization, the ops table directly points to all the
5744 * methods and ->inherits is no longer necessary and cleared.
5746 * Using ATA_OP_NULL, inheriting ops can force a method to NULL.
5751 static void ata_finalize_port_ops(struct ata_port_operations *ops)
5753 static DEFINE_SPINLOCK(lock);
5754 const struct ata_port_operations *cur;
5755 void **begin = (void **)ops;
5756 void **end = (void **)&ops->inherits;
5759 if (!ops || !ops->inherits)
5764 for (cur = ops->inherits; cur; cur = cur->inherits) {
5765 void **inherit = (void **)cur;
5767 for (pp = begin; pp < end; pp++, inherit++)
5772 for (pp = begin; pp < end; pp++)
5776 ops->inherits = NULL;
5782 * ata_host_start - start and freeze ports of an ATA host
5783 * @host: ATA host to start ports for
5785 * Start and then freeze ports of @host. Started status is
5786 * recorded in host->flags, so this function can be called
5787 * multiple times. Ports are guaranteed to get started only
5788 * once. If host->ops isn't initialized yet, its set to the
5789 * first non-dummy port ops.
5792 * Inherited from calling layer (may sleep).
5795 * 0 if all ports are started successfully, -errno otherwise.
5797 int ata_host_start(struct ata_host *host)
5800 void *start_dr = NULL;
5803 if (host->flags & ATA_HOST_STARTED)
5806 ata_finalize_port_ops(host->ops);
5808 for (i = 0; i < host->n_ports; i++) {
5809 struct ata_port *ap = host->ports[i];
5811 ata_finalize_port_ops(ap->ops);
5813 if (!host->ops && !ata_port_is_dummy(ap))
5814 host->ops = ap->ops;
5816 if (ap->ops->port_stop)
5820 if (host->ops->host_stop)
5824 start_dr = devres_alloc(ata_host_stop, 0, GFP_KERNEL);
5829 for (i = 0; i < host->n_ports; i++) {
5830 struct ata_port *ap = host->ports[i];
5832 if (ap->ops->port_start) {
5833 rc = ap->ops->port_start(ap);
5837 "failed to start port %d (errno=%d)\n",
5842 ata_eh_freeze_port(ap);
5846 devres_add(host->dev, start_dr);
5847 host->flags |= ATA_HOST_STARTED;
5852 struct ata_port *ap = host->ports[i];
5854 if (ap->ops->port_stop)
5855 ap->ops->port_stop(ap);
5857 devres_free(start_dr);
5862 * ata_sas_host_init - Initialize a host struct
5863 * @host: host to initialize
5864 * @dev: device host is attached to
5865 * @flags: host flags
5869 * PCI/etc. bus probe sem.
5872 /* KILLME - the only user left is ipr */
5873 void ata_host_init(struct ata_host *host, struct device *dev,
5874 unsigned long flags, struct ata_port_operations *ops)
5876 spin_lock_init(&host->lock);
5877 mutex_init(&host->eh_mutex);
5879 host->flags = flags;
5883 int ata_port_probe(struct ata_port *ap)
5888 if (ap->ops->error_handler) {
5889 struct ata_eh_info *ehi = &ap->link.eh_info;
5890 unsigned long flags;
5892 /* kick EH for boot probing */
5893 spin_lock_irqsave(ap->lock, flags);
5895 ehi->probe_mask |= ATA_ALL_DEVICES;
5896 ehi->action |= ATA_EH_RESET;
5897 ehi->flags |= ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET;
5899 ap->pflags &= ~ATA_PFLAG_INITIALIZING;
5900 ap->pflags |= ATA_PFLAG_LOADING;
5901 ata_port_schedule_eh(ap);
5903 spin_unlock_irqrestore(ap->lock, flags);
5905 /* wait for EH to finish */
5906 ata_port_wait_eh(ap);
5908 DPRINTK("ata%u: bus probe begin\n", ap->print_id);
5909 rc = ata_bus_probe(ap);
5910 DPRINTK("ata%u: bus probe end\n", ap->print_id);
5916 static void async_port_probe(void *data, async_cookie_t cookie)
5918 struct ata_port *ap = data;
5921 * If we're not allowed to scan this host in parallel,
5922 * we need to wait until all previous scans have completed
5923 * before going further.
5924 * Jeff Garzik says this is only within a controller, so we
5925 * don't need to wait for port 0, only for later ports.
5927 if (!(ap->host->flags & ATA_HOST_PARALLEL_SCAN) && ap->port_no != 0)
5928 async_synchronize_cookie(cookie);
5930 (void)ata_port_probe(ap);
5932 /* in order to keep device order, we need to synchronize at this point */
5933 async_synchronize_cookie(cookie);
5935 ata_scsi_scan_host(ap, 1);
5939 * ata_host_register - register initialized ATA host
5940 * @host: ATA host to register
5941 * @sht: template for SCSI host
5943 * Register initialized ATA host. @host is allocated using
5944 * ata_host_alloc() and fully initialized by LLD. This function
5945 * starts ports, registers @host with ATA and SCSI layers and
5946 * probe registered devices.
5949 * Inherited from calling layer (may sleep).
5952 * 0 on success, -errno otherwise.
5954 int ata_host_register(struct ata_host *host, struct scsi_host_template *sht)
5958 /* host must have been started */
5959 if (!(host->flags & ATA_HOST_STARTED)) {
5960 dev_err(host->dev, "BUG: trying to register unstarted host\n");
5965 /* Blow away unused ports. This happens when LLD can't
5966 * determine the exact number of ports to allocate at
5969 for (i = host->n_ports; host->ports[i]; i++)
5970 kfree(host->ports[i]);
5972 /* give ports names and add SCSI hosts */
5973 for (i = 0; i < host->n_ports; i++)
5974 host->ports[i]->print_id = ata_print_id++;
5977 /* Create associated sysfs transport objects */
5978 for (i = 0; i < host->n_ports; i++) {
5979 rc = ata_tport_add(host->dev,host->ports[i]);
5985 rc = ata_scsi_add_hosts(host, sht);
5989 /* associate with ACPI nodes */
5990 ata_acpi_associate(host);
5992 /* set cable, sata_spd_limit and report */
5993 for (i = 0; i < host->n_ports; i++) {
5994 struct ata_port *ap = host->ports[i];
5995 unsigned long xfer_mask;
5997 /* set SATA cable type if still unset */
5998 if (ap->cbl == ATA_CBL_NONE && (ap->flags & ATA_FLAG_SATA))
5999 ap->cbl = ATA_CBL_SATA;
6001 /* init sata_spd_limit to the current value */
6002 sata_link_init_spd(&ap->link);
6004 sata_link_init_spd(ap->slave_link);
6006 /* print per-port info to dmesg */
6007 xfer_mask = ata_pack_xfermask(ap->pio_mask, ap->mwdma_mask,
6010 if (!ata_port_is_dummy(ap)) {
6011 ata_port_info(ap, "%cATA max %s %s\n",
6012 (ap->flags & ATA_FLAG_SATA) ? 'S' : 'P',
6013 ata_mode_string(xfer_mask),
6014 ap->link.eh_info.desc);
6015 ata_ehi_clear_desc(&ap->link.eh_info);
6017 ata_port_info(ap, "DUMMY\n");
6020 /* perform each probe asynchronously */
6021 for (i = 0; i < host->n_ports; i++) {
6022 struct ata_port *ap = host->ports[i];
6023 async_schedule(async_port_probe, ap);
6030 ata_tport_delete(host->ports[i]);
6037 * ata_host_activate - start host, request IRQ and register it
6038 * @host: target ATA host
6039 * @irq: IRQ to request
6040 * @irq_handler: irq_handler used when requesting IRQ
6041 * @irq_flags: irq_flags used when requesting IRQ
6042 * @sht: scsi_host_template to use when registering the host
6044 * After allocating an ATA host and initializing it, most libata
6045 * LLDs perform three steps to activate the host - start host,
6046 * request IRQ and register it. This helper takes necessasry
6047 * arguments and performs the three steps in one go.
6049 * An invalid IRQ skips the IRQ registration and expects the host to
6050 * have set polling mode on the port. In this case, @irq_handler
6054 * Inherited from calling layer (may sleep).
6057 * 0 on success, -errno otherwise.
6059 int ata_host_activate(struct ata_host *host, int irq,
6060 irq_handler_t irq_handler, unsigned long irq_flags,
6061 struct scsi_host_template *sht)
6065 rc = ata_host_start(host);
6069 /* Special case for polling mode */
6071 WARN_ON(irq_handler);
6072 return ata_host_register(host, sht);
6075 rc = devm_request_irq(host->dev, irq, irq_handler, irq_flags,
6076 dev_driver_string(host->dev), host);
6080 for (i = 0; i < host->n_ports; i++)
6081 ata_port_desc(host->ports[i], "irq %d", irq);
6083 rc = ata_host_register(host, sht);
6084 /* if failed, just free the IRQ and leave ports alone */
6086 devm_free_irq(host->dev, irq, host);
6092 * ata_port_detach - Detach ATA port in prepration of device removal
6093 * @ap: ATA port to be detached
6095 * Detach all ATA devices and the associated SCSI devices of @ap;
6096 * then, remove the associated SCSI host. @ap is guaranteed to
6097 * be quiescent on return from this function.
6100 * Kernel thread context (may sleep).
6102 static void ata_port_detach(struct ata_port *ap)
6104 unsigned long flags;
6106 if (!ap->ops->error_handler)
6109 /* tell EH we're leaving & flush EH */
6110 spin_lock_irqsave(ap->lock, flags);
6111 ap->pflags |= ATA_PFLAG_UNLOADING;
6112 ata_port_schedule_eh(ap);
6113 spin_unlock_irqrestore(ap->lock, flags);
6115 /* wait till EH commits suicide */
6116 ata_port_wait_eh(ap);
6118 /* it better be dead now */
6119 WARN_ON(!(ap->pflags & ATA_PFLAG_UNLOADED));
6121 cancel_delayed_work_sync(&ap->hotplug_task);
6126 for (i = 0; i < SATA_PMP_MAX_PORTS; i++)
6127 ata_tlink_delete(&ap->pmp_link[i]);
6129 ata_tport_delete(ap);
6131 /* remove the associated SCSI host */
6132 scsi_remove_host(ap->scsi_host);
6136 * ata_host_detach - Detach all ports of an ATA host
6137 * @host: Host to detach
6139 * Detach all ports of @host.
6142 * Kernel thread context (may sleep).
6144 void ata_host_detach(struct ata_host *host)
6148 for (i = 0; i < host->n_ports; i++)
6149 ata_port_detach(host->ports[i]);
6151 /* the host is dead now, dissociate ACPI */
6152 ata_acpi_dissociate(host);
6158 * ata_pci_remove_one - PCI layer callback for device removal
6159 * @pdev: PCI device that was removed
6161 * PCI layer indicates to libata via this hook that hot-unplug or
6162 * module unload event has occurred. Detach all ports. Resource
6163 * release is handled via devres.
6166 * Inherited from PCI layer (may sleep).
6168 void ata_pci_remove_one(struct pci_dev *pdev)
6170 struct device *dev = &pdev->dev;
6171 struct ata_host *host = dev_get_drvdata(dev);
6173 ata_host_detach(host);
6176 /* move to PCI subsystem */
6177 int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits)
6179 unsigned long tmp = 0;
6181 switch (bits->width) {
6184 pci_read_config_byte(pdev, bits->reg, &tmp8);
6190 pci_read_config_word(pdev, bits->reg, &tmp16);
6196 pci_read_config_dword(pdev, bits->reg, &tmp32);
6207 return (tmp == bits->val) ? 1 : 0;
6211 void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg)
6213 pci_save_state(pdev);
6214 pci_disable_device(pdev);
6216 if (mesg.event & PM_EVENT_SLEEP)
6217 pci_set_power_state(pdev, PCI_D3hot);
6220 int ata_pci_device_do_resume(struct pci_dev *pdev)
6224 pci_set_power_state(pdev, PCI_D0);
6225 pci_restore_state(pdev);
6227 rc = pcim_enable_device(pdev);
6230 "failed to enable device after resume (%d)\n", rc);
6234 pci_set_master(pdev);
6238 int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg)
6240 struct ata_host *host = dev_get_drvdata(&pdev->dev);
6243 rc = ata_host_suspend(host, mesg);
6247 ata_pci_device_do_suspend(pdev, mesg);
6252 int ata_pci_device_resume(struct pci_dev *pdev)
6254 struct ata_host *host = dev_get_drvdata(&pdev->dev);
6257 rc = ata_pci_device_do_resume(pdev);
6259 ata_host_resume(host);
6262 #endif /* CONFIG_PM */
6264 #endif /* CONFIG_PCI */
6266 static int __init ata_parse_force_one(char **cur,
6267 struct ata_force_ent *force_ent,
6268 const char **reason)
6270 /* FIXME: Currently, there's no way to tag init const data and
6271 * using __initdata causes build failure on some versions of
6272 * gcc. Once __initdataconst is implemented, add const to the
6273 * following structure.
6275 static struct ata_force_param force_tbl[] __initdata = {
6276 { "40c", .cbl = ATA_CBL_PATA40 },
6277 { "80c", .cbl = ATA_CBL_PATA80 },
6278 { "short40c", .cbl = ATA_CBL_PATA40_SHORT },
6279 { "unk", .cbl = ATA_CBL_PATA_UNK },
6280 { "ign", .cbl = ATA_CBL_PATA_IGN },
6281 { "sata", .cbl = ATA_CBL_SATA },
6282 { "1.5Gbps", .spd_limit = 1 },
6283 { "3.0Gbps", .spd_limit = 2 },
6284 { "noncq", .horkage_on = ATA_HORKAGE_NONCQ },
6285 { "ncq", .horkage_off = ATA_HORKAGE_NONCQ },
6286 { "dump_id", .horkage_on = ATA_HORKAGE_DUMP_ID },
6287 { "pio0", .xfer_mask = 1 << (ATA_SHIFT_PIO + 0) },
6288 { "pio1", .xfer_mask = 1 << (ATA_SHIFT_PIO + 1) },
6289 { "pio2", .xfer_mask = 1 << (ATA_SHIFT_PIO + 2) },
6290 { "pio3", .xfer_mask = 1 << (ATA_SHIFT_PIO + 3) },
6291 { "pio4", .xfer_mask = 1 << (ATA_SHIFT_PIO + 4) },
6292 { "pio5", .xfer_mask = 1 << (ATA_SHIFT_PIO + 5) },
6293 { "pio6", .xfer_mask = 1 << (ATA_SHIFT_PIO + 6) },
6294 { "mwdma0", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 0) },
6295 { "mwdma1", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 1) },
6296 { "mwdma2", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 2) },
6297 { "mwdma3", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 3) },
6298 { "mwdma4", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 4) },
6299 { "udma0", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 0) },
6300 { "udma16", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 0) },
6301 { "udma/16", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 0) },
6302 { "udma1", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 1) },
6303 { "udma25", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 1) },
6304 { "udma/25", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 1) },
6305 { "udma2", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 2) },
6306 { "udma33", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 2) },
6307 { "udma/33", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 2) },
6308 { "udma3", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 3) },
6309 { "udma44", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 3) },
6310 { "udma/44", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 3) },
6311 { "udma4", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 4) },
6312 { "udma66", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 4) },
6313 { "udma/66", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 4) },
6314 { "udma5", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 5) },
6315 { "udma100", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 5) },
6316 { "udma/100", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 5) },
6317 { "udma6", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 6) },
6318 { "udma133", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 6) },
6319 { "udma/133", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 6) },
6320 { "udma7", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 7) },
6321 { "nohrst", .lflags = ATA_LFLAG_NO_HRST },
6322 { "nosrst", .lflags = ATA_LFLAG_NO_SRST },
6323 { "norst", .lflags = ATA_LFLAG_NO_HRST | ATA_LFLAG_NO_SRST },
6325 char *start = *cur, *p = *cur;
6326 char *id, *val, *endp;
6327 const struct ata_force_param *match_fp = NULL;
6328 int nr_matches = 0, i;
6330 /* find where this param ends and update *cur */
6331 while (*p != '\0' && *p != ',')
6342 p = strchr(start, ':');
6344 val = strstrip(start);
6349 id = strstrip(start);
6350 val = strstrip(p + 1);
6353 p = strchr(id, '.');
6356 force_ent->device = simple_strtoul(p, &endp, 10);
6357 if (p == endp || *endp != '\0') {
6358 *reason = "invalid device";
6363 force_ent->port = simple_strtoul(id, &endp, 10);
6364 if (p == endp || *endp != '\0') {
6365 *reason = "invalid port/link";
6370 /* parse val, allow shortcuts so that both 1.5 and 1.5Gbps work */
6371 for (i = 0; i < ARRAY_SIZE(force_tbl); i++) {
6372 const struct ata_force_param *fp = &force_tbl[i];
6374 if (strncasecmp(val, fp->name, strlen(val)))
6380 if (strcasecmp(val, fp->name) == 0) {
6387 *reason = "unknown value";
6390 if (nr_matches > 1) {
6391 *reason = "ambigious value";
6395 force_ent->param = *match_fp;
6400 static void __init ata_parse_force_param(void)
6402 int idx = 0, size = 1;
6403 int last_port = -1, last_device = -1;
6404 char *p, *cur, *next;
6406 /* calculate maximum number of params and allocate force_tbl */
6407 for (p = ata_force_param_buf; *p; p++)
6411 ata_force_tbl = kzalloc(sizeof(ata_force_tbl[0]) * size, GFP_KERNEL);
6412 if (!ata_force_tbl) {
6413 printk(KERN_WARNING "ata: failed to extend force table, "
6414 "libata.force ignored\n");
6418 /* parse and populate the table */
6419 for (cur = ata_force_param_buf; *cur != '\0'; cur = next) {
6420 const char *reason = "";
6421 struct ata_force_ent te = { .port = -1, .device = -1 };
6424 if (ata_parse_force_one(&next, &te, &reason)) {
6425 printk(KERN_WARNING "ata: failed to parse force "
6426 "parameter \"%s\" (%s)\n",
6431 if (te.port == -1) {
6432 te.port = last_port;
6433 te.device = last_device;
6436 ata_force_tbl[idx++] = te;
6438 last_port = te.port;
6439 last_device = te.device;
6442 ata_force_tbl_size = idx;
6445 static int __init ata_init(void)
6449 ata_parse_force_param();
6451 rc = ata_sff_init();
6453 kfree(ata_force_tbl);
6457 libata_transport_init();
6458 ata_scsi_transport_template = ata_attach_transport();
6459 if (!ata_scsi_transport_template) {
6465 printk(KERN_DEBUG "libata version " DRV_VERSION " loaded.\n");
6472 static void __exit ata_exit(void)
6474 ata_release_transport(ata_scsi_transport_template);
6475 libata_transport_exit();
6477 kfree(ata_force_tbl);
6480 subsys_initcall(ata_init);
6481 module_exit(ata_exit);
6483 static DEFINE_RATELIMIT_STATE(ratelimit, HZ / 5, 1);
6485 int ata_ratelimit(void)
6487 return __ratelimit(&ratelimit);
6491 * ata_msleep - ATA EH owner aware msleep
6492 * @ap: ATA port to attribute the sleep to
6493 * @msecs: duration to sleep in milliseconds
6495 * Sleeps @msecs. If the current task is owner of @ap's EH, the
6496 * ownership is released before going to sleep and reacquired
6497 * after the sleep is complete. IOW, other ports sharing the
6498 * @ap->host will be allowed to own the EH while this task is
6504 void ata_msleep(struct ata_port *ap, unsigned int msecs)
6506 bool owns_eh = ap && ap->host->eh_owner == current;
6518 * ata_wait_register - wait until register value changes
6519 * @ap: ATA port to wait register for, can be NULL
6520 * @reg: IO-mapped register
6521 * @mask: Mask to apply to read register value
6522 * @val: Wait condition
6523 * @interval: polling interval in milliseconds
6524 * @timeout: timeout in milliseconds
6526 * Waiting for some bits of register to change is a common
6527 * operation for ATA controllers. This function reads 32bit LE
6528 * IO-mapped register @reg and tests for the following condition.
6530 * (*@reg & mask) != val
6532 * If the condition is met, it returns; otherwise, the process is
6533 * repeated after @interval_msec until timeout.
6536 * Kernel thread context (may sleep)
6539 * The final register value.
6541 u32 ata_wait_register(struct ata_port *ap, void __iomem *reg, u32 mask, u32 val,
6542 unsigned long interval, unsigned long timeout)
6544 unsigned long deadline;
6547 tmp = ioread32(reg);
6549 /* Calculate timeout _after_ the first read to make sure
6550 * preceding writes reach the controller before starting to
6551 * eat away the timeout.
6553 deadline = ata_deadline(jiffies, timeout);
6555 while ((tmp & mask) == val && time_before(jiffies, deadline)) {
6556 ata_msleep(ap, interval);
6557 tmp = ioread32(reg);
6566 static unsigned int ata_dummy_qc_issue(struct ata_queued_cmd *qc)
6568 return AC_ERR_SYSTEM;
6571 static void ata_dummy_error_handler(struct ata_port *ap)
6576 struct ata_port_operations ata_dummy_port_ops = {
6577 .qc_prep = ata_noop_qc_prep,
6578 .qc_issue = ata_dummy_qc_issue,
6579 .error_handler = ata_dummy_error_handler,
6582 const struct ata_port_info ata_dummy_port_info = {
6583 .port_ops = &ata_dummy_port_ops,
6587 * Utility print functions
6589 int ata_port_printk(const struct ata_port *ap, const char *level,
6590 const char *fmt, ...)
6592 struct va_format vaf;
6596 va_start(args, fmt);
6601 r = printk("%sata%u: %pV", level, ap->print_id, &vaf);
6607 EXPORT_SYMBOL(ata_port_printk);
6609 int ata_link_printk(const struct ata_link *link, const char *level,
6610 const char *fmt, ...)
6612 struct va_format vaf;
6616 va_start(args, fmt);
6621 if (sata_pmp_attached(link->ap) || link->ap->slave_link)
6622 r = printk("%sata%u.%02u: %pV",
6623 level, link->ap->print_id, link->pmp, &vaf);
6625 r = printk("%sata%u: %pV",
6626 level, link->ap->print_id, &vaf);
6632 EXPORT_SYMBOL(ata_link_printk);
6634 int ata_dev_printk(const struct ata_device *dev, const char *level,
6635 const char *fmt, ...)
6637 struct va_format vaf;
6641 va_start(args, fmt);
6646 r = printk("%sata%u.%02u: %pV",
6647 level, dev->link->ap->print_id, dev->link->pmp + dev->devno,
6654 EXPORT_SYMBOL(ata_dev_printk);
6656 void ata_print_version(const struct device *dev, const char *version)
6658 dev_printk(KERN_DEBUG, dev, "version %s\n", version);
6660 EXPORT_SYMBOL(ata_print_version);
6663 * libata is essentially a library of internal helper functions for
6664 * low-level ATA host controller drivers. As such, the API/ABI is
6665 * likely to change as new drivers are added and updated.
6666 * Do not depend on ABI/API stability.
6668 EXPORT_SYMBOL_GPL(sata_deb_timing_normal);
6669 EXPORT_SYMBOL_GPL(sata_deb_timing_hotplug);
6670 EXPORT_SYMBOL_GPL(sata_deb_timing_long);
6671 EXPORT_SYMBOL_GPL(ata_base_port_ops);
6672 EXPORT_SYMBOL_GPL(sata_port_ops);
6673 EXPORT_SYMBOL_GPL(ata_dummy_port_ops);
6674 EXPORT_SYMBOL_GPL(ata_dummy_port_info);
6675 EXPORT_SYMBOL_GPL(ata_link_next);
6676 EXPORT_SYMBOL_GPL(ata_dev_next);
6677 EXPORT_SYMBOL_GPL(ata_std_bios_param);
6678 EXPORT_SYMBOL_GPL(ata_scsi_unlock_native_capacity);
6679 EXPORT_SYMBOL_GPL(ata_host_init);
6680 EXPORT_SYMBOL_GPL(ata_host_alloc);
6681 EXPORT_SYMBOL_GPL(ata_host_alloc_pinfo);
6682 EXPORT_SYMBOL_GPL(ata_slave_link_init);
6683 EXPORT_SYMBOL_GPL(ata_host_start);
6684 EXPORT_SYMBOL_GPL(ata_host_register);
6685 EXPORT_SYMBOL_GPL(ata_host_activate);
6686 EXPORT_SYMBOL_GPL(ata_host_detach);
6687 EXPORT_SYMBOL_GPL(ata_sg_init);
6688 EXPORT_SYMBOL_GPL(ata_qc_complete);
6689 EXPORT_SYMBOL_GPL(ata_qc_complete_multiple);
6690 EXPORT_SYMBOL_GPL(atapi_cmd_type);
6691 EXPORT_SYMBOL_GPL(ata_tf_to_fis);
6692 EXPORT_SYMBOL_GPL(ata_tf_from_fis);
6693 EXPORT_SYMBOL_GPL(ata_pack_xfermask);
6694 EXPORT_SYMBOL_GPL(ata_unpack_xfermask);
6695 EXPORT_SYMBOL_GPL(ata_xfer_mask2mode);
6696 EXPORT_SYMBOL_GPL(ata_xfer_mode2mask);
6697 EXPORT_SYMBOL_GPL(ata_xfer_mode2shift);
6698 EXPORT_SYMBOL_GPL(ata_mode_string);
6699 EXPORT_SYMBOL_GPL(ata_id_xfermask);
6700 EXPORT_SYMBOL_GPL(ata_do_set_mode);
6701 EXPORT_SYMBOL_GPL(ata_std_qc_defer);
6702 EXPORT_SYMBOL_GPL(ata_noop_qc_prep);
6703 EXPORT_SYMBOL_GPL(ata_dev_disable);
6704 EXPORT_SYMBOL_GPL(sata_set_spd);
6705 EXPORT_SYMBOL_GPL(ata_wait_after_reset);
6706 EXPORT_SYMBOL_GPL(sata_link_debounce);
6707 EXPORT_SYMBOL_GPL(sata_link_resume);
6708 EXPORT_SYMBOL_GPL(sata_link_scr_lpm);
6709 EXPORT_SYMBOL_GPL(ata_std_prereset);
6710 EXPORT_SYMBOL_GPL(sata_link_hardreset);
6711 EXPORT_SYMBOL_GPL(sata_std_hardreset);
6712 EXPORT_SYMBOL_GPL(ata_std_postreset);
6713 EXPORT_SYMBOL_GPL(ata_dev_classify);
6714 EXPORT_SYMBOL_GPL(ata_dev_pair);
6715 EXPORT_SYMBOL_GPL(ata_ratelimit);
6716 EXPORT_SYMBOL_GPL(ata_msleep);
6717 EXPORT_SYMBOL_GPL(ata_wait_register);
6718 EXPORT_SYMBOL_GPL(ata_scsi_queuecmd);
6719 EXPORT_SYMBOL_GPL(ata_scsi_slave_config);
6720 EXPORT_SYMBOL_GPL(ata_scsi_slave_destroy);
6721 EXPORT_SYMBOL_GPL(ata_scsi_change_queue_depth);
6722 EXPORT_SYMBOL_GPL(__ata_change_queue_depth);
6723 EXPORT_SYMBOL_GPL(sata_scr_valid);
6724 EXPORT_SYMBOL_GPL(sata_scr_read);
6725 EXPORT_SYMBOL_GPL(sata_scr_write);
6726 EXPORT_SYMBOL_GPL(sata_scr_write_flush);
6727 EXPORT_SYMBOL_GPL(ata_link_online);
6728 EXPORT_SYMBOL_GPL(ata_link_offline);
6730 EXPORT_SYMBOL_GPL(ata_host_suspend);
6731 EXPORT_SYMBOL_GPL(ata_host_resume);
6732 #endif /* CONFIG_PM */
6733 EXPORT_SYMBOL_GPL(ata_id_string);
6734 EXPORT_SYMBOL_GPL(ata_id_c_string);
6735 EXPORT_SYMBOL_GPL(ata_do_dev_read_id);
6736 EXPORT_SYMBOL_GPL(ata_scsi_simulate);
6738 EXPORT_SYMBOL_GPL(ata_pio_need_iordy);
6739 EXPORT_SYMBOL_GPL(ata_timing_find_mode);
6740 EXPORT_SYMBOL_GPL(ata_timing_compute);
6741 EXPORT_SYMBOL_GPL(ata_timing_merge);
6742 EXPORT_SYMBOL_GPL(ata_timing_cycle2mode);
6745 EXPORT_SYMBOL_GPL(pci_test_config_bits);
6746 EXPORT_SYMBOL_GPL(ata_pci_remove_one);
6748 EXPORT_SYMBOL_GPL(ata_pci_device_do_suspend);
6749 EXPORT_SYMBOL_GPL(ata_pci_device_do_resume);
6750 EXPORT_SYMBOL_GPL(ata_pci_device_suspend);
6751 EXPORT_SYMBOL_GPL(ata_pci_device_resume);
6752 #endif /* CONFIG_PM */
6753 #endif /* CONFIG_PCI */
6755 EXPORT_SYMBOL_GPL(__ata_ehi_push_desc);
6756 EXPORT_SYMBOL_GPL(ata_ehi_push_desc);
6757 EXPORT_SYMBOL_GPL(ata_ehi_clear_desc);
6758 EXPORT_SYMBOL_GPL(ata_port_desc);
6760 EXPORT_SYMBOL_GPL(ata_port_pbar_desc);
6761 #endif /* CONFIG_PCI */
6762 EXPORT_SYMBOL_GPL(ata_port_schedule_eh);
6763 EXPORT_SYMBOL_GPL(ata_link_abort);
6764 EXPORT_SYMBOL_GPL(ata_port_abort);
6765 EXPORT_SYMBOL_GPL(ata_port_freeze);
6766 EXPORT_SYMBOL_GPL(sata_async_notification);
6767 EXPORT_SYMBOL_GPL(ata_eh_freeze_port);
6768 EXPORT_SYMBOL_GPL(ata_eh_thaw_port);
6769 EXPORT_SYMBOL_GPL(ata_eh_qc_complete);
6770 EXPORT_SYMBOL_GPL(ata_eh_qc_retry);
6771 EXPORT_SYMBOL_GPL(ata_eh_analyze_ncq_error);
6772 EXPORT_SYMBOL_GPL(ata_do_eh);
6773 EXPORT_SYMBOL_GPL(ata_std_error_handler);
6775 EXPORT_SYMBOL_GPL(ata_cable_40wire);
6776 EXPORT_SYMBOL_GPL(ata_cable_80wire);
6777 EXPORT_SYMBOL_GPL(ata_cable_unknown);
6778 EXPORT_SYMBOL_GPL(ata_cable_ignore);
6779 EXPORT_SYMBOL_GPL(ata_cable_sata);