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);
1602 /* some SATA bridges need us to indicate data xfer direction */
1603 if (tf->protocol == ATAPI_PROT_DMA && (dev->flags & ATA_DFLAG_DMADIR) &&
1604 dma_dir == DMA_FROM_DEVICE)
1605 qc->tf.feature |= ATAPI_DMADIR;
1607 qc->flags |= ATA_QCFLAG_RESULT_TF;
1608 qc->dma_dir = dma_dir;
1609 if (dma_dir != DMA_NONE) {
1610 unsigned int i, buflen = 0;
1611 struct scatterlist *sg;
1613 for_each_sg(sgl, sg, n_elem, i)
1614 buflen += sg->length;
1616 ata_sg_init(qc, sgl, n_elem);
1617 qc->nbytes = buflen;
1620 qc->private_data = &wait;
1621 qc->complete_fn = ata_qc_complete_internal;
1625 spin_unlock_irqrestore(ap->lock, flags);
1628 if (ata_probe_timeout)
1629 timeout = ata_probe_timeout * 1000;
1631 timeout = ata_internal_cmd_timeout(dev, command);
1636 if (ap->ops->error_handler)
1639 rc = wait_for_completion_timeout(&wait, msecs_to_jiffies(timeout));
1641 if (ap->ops->error_handler)
1644 ata_sff_flush_pio_task(ap);
1647 spin_lock_irqsave(ap->lock, flags);
1649 /* We're racing with irq here. If we lose, the
1650 * following test prevents us from completing the qc
1651 * twice. If we win, the port is frozen and will be
1652 * cleaned up by ->post_internal_cmd().
1654 if (qc->flags & ATA_QCFLAG_ACTIVE) {
1655 qc->err_mask |= AC_ERR_TIMEOUT;
1657 if (ap->ops->error_handler)
1658 ata_port_freeze(ap);
1660 ata_qc_complete(qc);
1662 if (ata_msg_warn(ap))
1663 ata_dev_warn(dev, "qc timeout (cmd 0x%x)\n",
1667 spin_unlock_irqrestore(ap->lock, flags);
1670 /* do post_internal_cmd */
1671 if (ap->ops->post_internal_cmd)
1672 ap->ops->post_internal_cmd(qc);
1674 /* perform minimal error analysis */
1675 if (qc->flags & ATA_QCFLAG_FAILED) {
1676 if (qc->result_tf.command & (ATA_ERR | ATA_DF))
1677 qc->err_mask |= AC_ERR_DEV;
1680 qc->err_mask |= AC_ERR_OTHER;
1682 if (qc->err_mask & ~AC_ERR_OTHER)
1683 qc->err_mask &= ~AC_ERR_OTHER;
1687 spin_lock_irqsave(ap->lock, flags);
1689 *tf = qc->result_tf;
1690 err_mask = qc->err_mask;
1693 link->active_tag = preempted_tag;
1694 link->sactive = preempted_sactive;
1695 ap->qc_active = preempted_qc_active;
1696 ap->nr_active_links = preempted_nr_active_links;
1698 spin_unlock_irqrestore(ap->lock, flags);
1700 if ((err_mask & AC_ERR_TIMEOUT) && auto_timeout)
1701 ata_internal_cmd_timed_out(dev, command);
1707 * ata_exec_internal - execute libata internal command
1708 * @dev: Device to which the command is sent
1709 * @tf: Taskfile registers for the command and the result
1710 * @cdb: CDB for packet command
1711 * @dma_dir: Data tranfer direction of the command
1712 * @buf: Data buffer of the command
1713 * @buflen: Length of data buffer
1714 * @timeout: Timeout in msecs (0 for default)
1716 * Wrapper around ata_exec_internal_sg() which takes simple
1717 * buffer instead of sg list.
1720 * None. Should be called with kernel context, might sleep.
1723 * Zero on success, AC_ERR_* mask on failure
1725 unsigned ata_exec_internal(struct ata_device *dev,
1726 struct ata_taskfile *tf, const u8 *cdb,
1727 int dma_dir, void *buf, unsigned int buflen,
1728 unsigned long timeout)
1730 struct scatterlist *psg = NULL, sg;
1731 unsigned int n_elem = 0;
1733 if (dma_dir != DMA_NONE) {
1735 sg_init_one(&sg, buf, buflen);
1740 return ata_exec_internal_sg(dev, tf, cdb, dma_dir, psg, n_elem,
1745 * ata_do_simple_cmd - execute simple internal command
1746 * @dev: Device to which the command is sent
1747 * @cmd: Opcode to execute
1749 * Execute a 'simple' command, that only consists of the opcode
1750 * 'cmd' itself, without filling any other registers
1753 * Kernel thread context (may sleep).
1756 * Zero on success, AC_ERR_* mask on failure
1758 unsigned int ata_do_simple_cmd(struct ata_device *dev, u8 cmd)
1760 struct ata_taskfile tf;
1762 ata_tf_init(dev, &tf);
1765 tf.flags |= ATA_TFLAG_DEVICE;
1766 tf.protocol = ATA_PROT_NODATA;
1768 return ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
1772 * ata_pio_need_iordy - check if iordy needed
1775 * Check if the current speed of the device requires IORDY. Used
1776 * by various controllers for chip configuration.
1778 unsigned int ata_pio_need_iordy(const struct ata_device *adev)
1780 /* Don't set IORDY if we're preparing for reset. IORDY may
1781 * lead to controller lock up on certain controllers if the
1782 * port is not occupied. See bko#11703 for details.
1784 if (adev->link->ap->pflags & ATA_PFLAG_RESETTING)
1786 /* Controller doesn't support IORDY. Probably a pointless
1787 * check as the caller should know this.
1789 if (adev->link->ap->flags & ATA_FLAG_NO_IORDY)
1791 /* CF spec. r4.1 Table 22 says no iordy on PIO5 and PIO6. */
1792 if (ata_id_is_cfa(adev->id)
1793 && (adev->pio_mode == XFER_PIO_5 || adev->pio_mode == XFER_PIO_6))
1795 /* PIO3 and higher it is mandatory */
1796 if (adev->pio_mode > XFER_PIO_2)
1798 /* We turn it on when possible */
1799 if (ata_id_has_iordy(adev->id))
1805 * ata_pio_mask_no_iordy - Return the non IORDY mask
1808 * Compute the highest mode possible if we are not using iordy. Return
1809 * -1 if no iordy mode is available.
1811 static u32 ata_pio_mask_no_iordy(const struct ata_device *adev)
1813 /* If we have no drive specific rule, then PIO 2 is non IORDY */
1814 if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE */
1815 u16 pio = adev->id[ATA_ID_EIDE_PIO];
1816 /* Is the speed faster than the drive allows non IORDY ? */
1818 /* This is cycle times not frequency - watch the logic! */
1819 if (pio > 240) /* PIO2 is 240nS per cycle */
1820 return 3 << ATA_SHIFT_PIO;
1821 return 7 << ATA_SHIFT_PIO;
1824 return 3 << ATA_SHIFT_PIO;
1828 * ata_do_dev_read_id - default ID read method
1830 * @tf: proposed taskfile
1833 * Issue the identify taskfile and hand back the buffer containing
1834 * identify data. For some RAID controllers and for pre ATA devices
1835 * this function is wrapped or replaced by the driver
1837 unsigned int ata_do_dev_read_id(struct ata_device *dev,
1838 struct ata_taskfile *tf, u16 *id)
1840 return ata_exec_internal(dev, tf, NULL, DMA_FROM_DEVICE,
1841 id, sizeof(id[0]) * ATA_ID_WORDS, 0);
1845 * ata_dev_read_id - Read ID data from the specified device
1846 * @dev: target device
1847 * @p_class: pointer to class of the target device (may be changed)
1848 * @flags: ATA_READID_* flags
1849 * @id: buffer to read IDENTIFY data into
1851 * Read ID data from the specified device. ATA_CMD_ID_ATA is
1852 * performed on ATA devices and ATA_CMD_ID_ATAPI on ATAPI
1853 * devices. This function also issues ATA_CMD_INIT_DEV_PARAMS
1854 * for pre-ATA4 drives.
1856 * FIXME: ATA_CMD_ID_ATA is optional for early drives and right
1857 * now we abort if we hit that case.
1860 * Kernel thread context (may sleep)
1863 * 0 on success, -errno otherwise.
1865 int ata_dev_read_id(struct ata_device *dev, unsigned int *p_class,
1866 unsigned int flags, u16 *id)
1868 struct ata_port *ap = dev->link->ap;
1869 unsigned int class = *p_class;
1870 struct ata_taskfile tf;
1871 unsigned int err_mask = 0;
1873 bool is_semb = class == ATA_DEV_SEMB;
1874 int may_fallback = 1, tried_spinup = 0;
1877 if (ata_msg_ctl(ap))
1878 ata_dev_dbg(dev, "%s: ENTER\n", __func__);
1881 ata_tf_init(dev, &tf);
1885 class = ATA_DEV_ATA; /* some hard drives report SEMB sig */
1887 tf.command = ATA_CMD_ID_ATA;
1890 tf.command = ATA_CMD_ID_ATAPI;
1894 reason = "unsupported class";
1898 tf.protocol = ATA_PROT_PIO;
1900 /* Some devices choke if TF registers contain garbage. Make
1901 * sure those are properly initialized.
1903 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
1905 /* Device presence detection is unreliable on some
1906 * controllers. Always poll IDENTIFY if available.
1908 tf.flags |= ATA_TFLAG_POLLING;
1910 if (ap->ops->read_id)
1911 err_mask = ap->ops->read_id(dev, &tf, id);
1913 err_mask = ata_do_dev_read_id(dev, &tf, id);
1916 if (err_mask & AC_ERR_NODEV_HINT) {
1917 ata_dev_dbg(dev, "NODEV after polling detection\n");
1923 "IDENTIFY failed on device w/ SEMB sig, disabled\n");
1924 /* SEMB is not supported yet */
1925 *p_class = ATA_DEV_SEMB_UNSUP;
1929 if ((err_mask == AC_ERR_DEV) && (tf.feature & ATA_ABORTED)) {
1930 /* Device or controller might have reported
1931 * the wrong device class. Give a shot at the
1932 * other IDENTIFY if the current one is
1933 * aborted by the device.
1938 if (class == ATA_DEV_ATA)
1939 class = ATA_DEV_ATAPI;
1941 class = ATA_DEV_ATA;
1945 /* Control reaches here iff the device aborted
1946 * both flavors of IDENTIFYs which happens
1947 * sometimes with phantom devices.
1950 "both IDENTIFYs aborted, assuming NODEV\n");
1955 reason = "I/O error";
1959 if (dev->horkage & ATA_HORKAGE_DUMP_ID) {
1960 ata_dev_dbg(dev, "dumping IDENTIFY data, "
1961 "class=%d may_fallback=%d tried_spinup=%d\n",
1962 class, may_fallback, tried_spinup);
1963 print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET,
1964 16, 2, id, ATA_ID_WORDS * sizeof(*id), true);
1967 /* Falling back doesn't make sense if ID data was read
1968 * successfully at least once.
1972 swap_buf_le16(id, ATA_ID_WORDS);
1976 reason = "device reports invalid type";
1978 if (class == ATA_DEV_ATA) {
1979 if (!ata_id_is_ata(id) && !ata_id_is_cfa(id))
1982 if (ata_id_is_ata(id))
1986 if (!tried_spinup && (id[2] == 0x37c8 || id[2] == 0x738c)) {
1989 * Drive powered-up in standby mode, and requires a specific
1990 * SET_FEATURES spin-up subcommand before it will accept
1991 * anything other than the original IDENTIFY command.
1993 err_mask = ata_dev_set_feature(dev, SETFEATURES_SPINUP, 0);
1994 if (err_mask && id[2] != 0x738c) {
1996 reason = "SPINUP failed";
2000 * If the drive initially returned incomplete IDENTIFY info,
2001 * we now must reissue the IDENTIFY command.
2003 if (id[2] == 0x37c8)
2007 if ((flags & ATA_READID_POSTRESET) && class == ATA_DEV_ATA) {
2009 * The exact sequence expected by certain pre-ATA4 drives is:
2011 * IDENTIFY (optional in early ATA)
2012 * INITIALIZE DEVICE PARAMETERS (later IDE and ATA)
2014 * Some drives were very specific about that exact sequence.
2016 * Note that ATA4 says lba is mandatory so the second check
2017 * should never trigger.
2019 if (ata_id_major_version(id) < 4 || !ata_id_has_lba(id)) {
2020 err_mask = ata_dev_init_params(dev, id[3], id[6]);
2023 reason = "INIT_DEV_PARAMS failed";
2027 /* current CHS translation info (id[53-58]) might be
2028 * changed. reread the identify device info.
2030 flags &= ~ATA_READID_POSTRESET;
2040 if (ata_msg_warn(ap))
2041 ata_dev_warn(dev, "failed to IDENTIFY (%s, err_mask=0x%x)\n",
2046 static int ata_do_link_spd_horkage(struct ata_device *dev)
2048 struct ata_link *plink = ata_dev_phys_link(dev);
2049 u32 target, target_limit;
2051 if (!sata_scr_valid(plink))
2054 if (dev->horkage & ATA_HORKAGE_1_5_GBPS)
2059 target_limit = (1 << target) - 1;
2061 /* if already on stricter limit, no need to push further */
2062 if (plink->sata_spd_limit <= target_limit)
2065 plink->sata_spd_limit = target_limit;
2067 /* Request another EH round by returning -EAGAIN if link is
2068 * going faster than the target speed. Forward progress is
2069 * guaranteed by setting sata_spd_limit to target_limit above.
2071 if (plink->sata_spd > target) {
2072 ata_dev_info(dev, "applying link speed limit horkage to %s\n",
2073 sata_spd_string(target));
2079 static inline u8 ata_dev_knobble(struct ata_device *dev)
2081 struct ata_port *ap = dev->link->ap;
2083 if (ata_dev_blacklisted(dev) & ATA_HORKAGE_BRIDGE_OK)
2086 return ((ap->cbl == ATA_CBL_SATA) && (!ata_id_is_sata(dev->id)));
2089 static int ata_dev_config_ncq(struct ata_device *dev,
2090 char *desc, size_t desc_sz)
2092 struct ata_port *ap = dev->link->ap;
2093 int hdepth = 0, ddepth = ata_id_queue_depth(dev->id);
2094 unsigned int err_mask;
2097 if (!ata_id_has_ncq(dev->id)) {
2101 if (dev->horkage & ATA_HORKAGE_NONCQ) {
2102 snprintf(desc, desc_sz, "NCQ (not used)");
2105 if (ap->flags & ATA_FLAG_NCQ) {
2106 hdepth = min(ap->scsi_host->can_queue, ATA_MAX_QUEUE - 1);
2107 dev->flags |= ATA_DFLAG_NCQ;
2110 if (!(dev->horkage & ATA_HORKAGE_BROKEN_FPDMA_AA) &&
2111 (ap->flags & ATA_FLAG_FPDMA_AA) &&
2112 ata_id_has_fpdma_aa(dev->id)) {
2113 err_mask = ata_dev_set_feature(dev, SETFEATURES_SATA_ENABLE,
2117 "failed to enable AA (error_mask=0x%x)\n",
2119 if (err_mask != AC_ERR_DEV) {
2120 dev->horkage |= ATA_HORKAGE_BROKEN_FPDMA_AA;
2127 if (hdepth >= ddepth)
2128 snprintf(desc, desc_sz, "NCQ (depth %d)%s", ddepth, aa_desc);
2130 snprintf(desc, desc_sz, "NCQ (depth %d/%d)%s", hdepth,
2136 * ata_dev_configure - Configure the specified ATA/ATAPI device
2137 * @dev: Target device to configure
2139 * Configure @dev according to @dev->id. Generic and low-level
2140 * driver specific fixups are also applied.
2143 * Kernel thread context (may sleep)
2146 * 0 on success, -errno otherwise
2148 int ata_dev_configure(struct ata_device *dev)
2150 struct ata_port *ap = dev->link->ap;
2151 struct ata_eh_context *ehc = &dev->link->eh_context;
2152 int print_info = ehc->i.flags & ATA_EHI_PRINTINFO;
2153 const u16 *id = dev->id;
2154 unsigned long xfer_mask;
2155 char revbuf[7]; /* XYZ-99\0 */
2156 char fwrevbuf[ATA_ID_FW_REV_LEN+1];
2157 char modelbuf[ATA_ID_PROD_LEN+1];
2160 if (!ata_dev_enabled(dev) && ata_msg_info(ap)) {
2161 ata_dev_info(dev, "%s: ENTER/EXIT -- nodev\n", __func__);
2165 if (ata_msg_probe(ap))
2166 ata_dev_dbg(dev, "%s: ENTER\n", __func__);
2169 dev->horkage |= ata_dev_blacklisted(dev);
2170 ata_force_horkage(dev);
2172 if (dev->horkage & ATA_HORKAGE_DISABLE) {
2173 ata_dev_info(dev, "unsupported device, disabling\n");
2174 ata_dev_disable(dev);
2178 if ((!atapi_enabled || (ap->flags & ATA_FLAG_NO_ATAPI)) &&
2179 dev->class == ATA_DEV_ATAPI) {
2180 ata_dev_warn(dev, "WARNING: ATAPI is %s, device ignored\n",
2181 atapi_enabled ? "not supported with this driver"
2183 ata_dev_disable(dev);
2187 rc = ata_do_link_spd_horkage(dev);
2191 /* some WD SATA-1 drives have issues with LPM, turn on NOLPM for them */
2192 if ((dev->horkage & ATA_HORKAGE_WD_BROKEN_LPM) &&
2193 (id[76] & 0xe) == 0x2)
2194 dev->horkage |= ATA_HORKAGE_NOLPM;
2196 if (dev->horkage & ATA_HORKAGE_NOLPM) {
2197 ata_dev_warn(dev, "LPM support broken, forcing max_power\n");
2198 dev->link->ap->target_lpm_policy = ATA_LPM_MAX_POWER;
2201 /* let ACPI work its magic */
2202 rc = ata_acpi_on_devcfg(dev);
2206 /* massage HPA, do it early as it might change IDENTIFY data */
2207 rc = ata_hpa_resize(dev);
2211 /* print device capabilities */
2212 if (ata_msg_probe(ap))
2214 "%s: cfg 49:%04x 82:%04x 83:%04x 84:%04x "
2215 "85:%04x 86:%04x 87:%04x 88:%04x\n",
2217 id[49], id[82], id[83], id[84],
2218 id[85], id[86], id[87], id[88]);
2220 /* initialize to-be-configured parameters */
2221 dev->flags &= ~ATA_DFLAG_CFG_MASK;
2222 dev->max_sectors = 0;
2228 dev->multi_count = 0;
2231 * common ATA, ATAPI feature tests
2234 /* find max transfer mode; for printk only */
2235 xfer_mask = ata_id_xfermask(id);
2237 if (ata_msg_probe(ap))
2240 /* SCSI only uses 4-char revisions, dump full 8 chars from ATA */
2241 ata_id_c_string(dev->id, fwrevbuf, ATA_ID_FW_REV,
2244 ata_id_c_string(dev->id, modelbuf, ATA_ID_PROD,
2247 /* ATA-specific feature tests */
2248 if (dev->class == ATA_DEV_ATA) {
2249 if (ata_id_is_cfa(id)) {
2250 /* CPRM may make this media unusable */
2251 if (id[ATA_ID_CFA_KEY_MGMT] & 1)
2253 "supports DRM functions and may not be fully accessible\n");
2254 snprintf(revbuf, 7, "CFA");
2256 snprintf(revbuf, 7, "ATA-%d", ata_id_major_version(id));
2257 /* Warn the user if the device has TPM extensions */
2258 if (ata_id_has_tpm(id))
2260 "supports DRM functions and may not be fully accessible\n");
2263 dev->n_sectors = ata_id_n_sectors(id);
2265 /* get current R/W Multiple count setting */
2266 if ((dev->id[47] >> 8) == 0x80 && (dev->id[59] & 0x100)) {
2267 unsigned int max = dev->id[47] & 0xff;
2268 unsigned int cnt = dev->id[59] & 0xff;
2269 /* only recognize/allow powers of two here */
2270 if (is_power_of_2(max) && is_power_of_2(cnt))
2272 dev->multi_count = cnt;
2275 if (ata_id_has_lba(id)) {
2276 const char *lba_desc;
2280 dev->flags |= ATA_DFLAG_LBA;
2281 if (ata_id_has_lba48(id)) {
2282 dev->flags |= ATA_DFLAG_LBA48;
2285 if (dev->n_sectors >= (1UL << 28) &&
2286 ata_id_has_flush_ext(id))
2287 dev->flags |= ATA_DFLAG_FLUSH_EXT;
2291 rc = ata_dev_config_ncq(dev, ncq_desc, sizeof(ncq_desc));
2295 /* print device info to dmesg */
2296 if (ata_msg_drv(ap) && print_info) {
2297 ata_dev_info(dev, "%s: %s, %s, max %s\n",
2298 revbuf, modelbuf, fwrevbuf,
2299 ata_mode_string(xfer_mask));
2301 "%llu sectors, multi %u: %s %s\n",
2302 (unsigned long long)dev->n_sectors,
2303 dev->multi_count, lba_desc, ncq_desc);
2308 /* Default translation */
2309 dev->cylinders = id[1];
2311 dev->sectors = id[6];
2313 if (ata_id_current_chs_valid(id)) {
2314 /* Current CHS translation is valid. */
2315 dev->cylinders = id[54];
2316 dev->heads = id[55];
2317 dev->sectors = id[56];
2320 /* print device info to dmesg */
2321 if (ata_msg_drv(ap) && print_info) {
2322 ata_dev_info(dev, "%s: %s, %s, max %s\n",
2323 revbuf, modelbuf, fwrevbuf,
2324 ata_mode_string(xfer_mask));
2326 "%llu sectors, multi %u, CHS %u/%u/%u\n",
2327 (unsigned long long)dev->n_sectors,
2328 dev->multi_count, dev->cylinders,
2329 dev->heads, dev->sectors);
2336 /* ATAPI-specific feature tests */
2337 else if (dev->class == ATA_DEV_ATAPI) {
2338 const char *cdb_intr_string = "";
2339 const char *atapi_an_string = "";
2340 const char *dma_dir_string = "";
2343 rc = atapi_cdb_len(id);
2344 if ((rc < 12) || (rc > ATAPI_CDB_LEN)) {
2345 if (ata_msg_warn(ap))
2346 ata_dev_warn(dev, "unsupported CDB len\n");
2350 dev->cdb_len = (unsigned int) rc;
2352 /* Enable ATAPI AN if both the host and device have
2353 * the support. If PMP is attached, SNTF is required
2354 * to enable ATAPI AN to discern between PHY status
2355 * changed notifications and ATAPI ANs.
2358 (ap->flags & ATA_FLAG_AN) && ata_id_has_atapi_AN(id) &&
2359 (!sata_pmp_attached(ap) ||
2360 sata_scr_read(&ap->link, SCR_NOTIFICATION, &sntf) == 0)) {
2361 unsigned int err_mask;
2363 /* issue SET feature command to turn this on */
2364 err_mask = ata_dev_set_feature(dev,
2365 SETFEATURES_SATA_ENABLE, SATA_AN);
2368 "failed to enable ATAPI AN (err_mask=0x%x)\n",
2371 dev->flags |= ATA_DFLAG_AN;
2372 atapi_an_string = ", ATAPI AN";
2376 if (ata_id_cdb_intr(dev->id)) {
2377 dev->flags |= ATA_DFLAG_CDB_INTR;
2378 cdb_intr_string = ", CDB intr";
2381 if (atapi_dmadir || atapi_id_dmadir(dev->id)) {
2382 dev->flags |= ATA_DFLAG_DMADIR;
2383 dma_dir_string = ", DMADIR";
2386 /* print device info to dmesg */
2387 if (ata_msg_drv(ap) && print_info)
2389 "ATAPI: %s, %s, max %s%s%s%s\n",
2391 ata_mode_string(xfer_mask),
2392 cdb_intr_string, atapi_an_string,
2396 /* determine max_sectors */
2397 dev->max_sectors = ATA_MAX_SECTORS;
2398 if (dev->flags & ATA_DFLAG_LBA48)
2399 dev->max_sectors = ATA_MAX_SECTORS_LBA48;
2401 /* Limit PATA drive on SATA cable bridge transfers to udma5,
2403 if (ata_dev_knobble(dev)) {
2404 if (ata_msg_drv(ap) && print_info)
2405 ata_dev_info(dev, "applying bridge limits\n");
2406 dev->udma_mask &= ATA_UDMA5;
2407 dev->max_sectors = ATA_MAX_SECTORS;
2410 if ((dev->class == ATA_DEV_ATAPI) &&
2411 (atapi_command_packet_set(id) == TYPE_TAPE)) {
2412 dev->max_sectors = ATA_MAX_SECTORS_TAPE;
2413 dev->horkage |= ATA_HORKAGE_STUCK_ERR;
2416 if (dev->horkage & ATA_HORKAGE_MAX_SEC_128)
2417 dev->max_sectors = min_t(unsigned int, ATA_MAX_SECTORS_128,
2420 if (dev->horkage & ATA_HORKAGE_MAX_SEC_LBA48)
2421 dev->max_sectors = ATA_MAX_SECTORS_LBA48;
2423 if (ap->ops->dev_config)
2424 ap->ops->dev_config(dev);
2426 if (dev->horkage & ATA_HORKAGE_DIAGNOSTIC) {
2427 /* Let the user know. We don't want to disallow opens for
2428 rescue purposes, or in case the vendor is just a blithering
2429 idiot. Do this after the dev_config call as some controllers
2430 with buggy firmware may want to avoid reporting false device
2435 "Drive reports diagnostics failure. This may indicate a drive\n");
2437 "fault or invalid emulation. Contact drive vendor for information.\n");
2441 if ((dev->horkage & ATA_HORKAGE_FIRMWARE_WARN) && print_info) {
2442 ata_dev_warn(dev, "WARNING: device requires firmware update to be fully functional\n");
2443 ata_dev_warn(dev, " contact the vendor or visit http://ata.wiki.kernel.org\n");
2449 if (ata_msg_probe(ap))
2450 ata_dev_dbg(dev, "%s: EXIT, err\n", __func__);
2455 * ata_cable_40wire - return 40 wire cable type
2458 * Helper method for drivers which want to hardwire 40 wire cable
2462 int ata_cable_40wire(struct ata_port *ap)
2464 return ATA_CBL_PATA40;
2468 * ata_cable_80wire - return 80 wire cable type
2471 * Helper method for drivers which want to hardwire 80 wire cable
2475 int ata_cable_80wire(struct ata_port *ap)
2477 return ATA_CBL_PATA80;
2481 * ata_cable_unknown - return unknown PATA cable.
2484 * Helper method for drivers which have no PATA cable detection.
2487 int ata_cable_unknown(struct ata_port *ap)
2489 return ATA_CBL_PATA_UNK;
2493 * ata_cable_ignore - return ignored PATA cable.
2496 * Helper method for drivers which don't use cable type to limit
2499 int ata_cable_ignore(struct ata_port *ap)
2501 return ATA_CBL_PATA_IGN;
2505 * ata_cable_sata - return SATA cable type
2508 * Helper method for drivers which have SATA cables
2511 int ata_cable_sata(struct ata_port *ap)
2513 return ATA_CBL_SATA;
2517 * ata_bus_probe - Reset and probe ATA bus
2520 * Master ATA bus probing function. Initiates a hardware-dependent
2521 * bus reset, then attempts to identify any devices found on
2525 * PCI/etc. bus probe sem.
2528 * Zero on success, negative errno otherwise.
2531 int ata_bus_probe(struct ata_port *ap)
2533 unsigned int classes[ATA_MAX_DEVICES];
2534 int tries[ATA_MAX_DEVICES];
2536 struct ata_device *dev;
2538 ata_for_each_dev(dev, &ap->link, ALL)
2539 tries[dev->devno] = ATA_PROBE_MAX_TRIES;
2542 ata_for_each_dev(dev, &ap->link, ALL) {
2543 /* If we issue an SRST then an ATA drive (not ATAPI)
2544 * may change configuration and be in PIO0 timing. If
2545 * we do a hard reset (or are coming from power on)
2546 * this is true for ATA or ATAPI. Until we've set a
2547 * suitable controller mode we should not touch the
2548 * bus as we may be talking too fast.
2550 dev->pio_mode = XFER_PIO_0;
2551 dev->dma_mode = 0xff;
2553 /* If the controller has a pio mode setup function
2554 * then use it to set the chipset to rights. Don't
2555 * touch the DMA setup as that will be dealt with when
2556 * configuring devices.
2558 if (ap->ops->set_piomode)
2559 ap->ops->set_piomode(ap, dev);
2562 /* reset and determine device classes */
2563 ap->ops->phy_reset(ap);
2565 ata_for_each_dev(dev, &ap->link, ALL) {
2566 if (dev->class != ATA_DEV_UNKNOWN)
2567 classes[dev->devno] = dev->class;
2569 classes[dev->devno] = ATA_DEV_NONE;
2571 dev->class = ATA_DEV_UNKNOWN;
2574 /* read IDENTIFY page and configure devices. We have to do the identify
2575 specific sequence bass-ackwards so that PDIAG- is released by
2578 ata_for_each_dev(dev, &ap->link, ALL_REVERSE) {
2579 if (tries[dev->devno])
2580 dev->class = classes[dev->devno];
2582 if (!ata_dev_enabled(dev))
2585 rc = ata_dev_read_id(dev, &dev->class, ATA_READID_POSTRESET,
2591 /* Now ask for the cable type as PDIAG- should have been released */
2592 if (ap->ops->cable_detect)
2593 ap->cbl = ap->ops->cable_detect(ap);
2595 /* We may have SATA bridge glue hiding here irrespective of
2596 * the reported cable types and sensed types. When SATA
2597 * drives indicate we have a bridge, we don't know which end
2598 * of the link the bridge is which is a problem.
2600 ata_for_each_dev(dev, &ap->link, ENABLED)
2601 if (ata_id_is_sata(dev->id))
2602 ap->cbl = ATA_CBL_SATA;
2604 /* After the identify sequence we can now set up the devices. We do
2605 this in the normal order so that the user doesn't get confused */
2607 ata_for_each_dev(dev, &ap->link, ENABLED) {
2608 ap->link.eh_context.i.flags |= ATA_EHI_PRINTINFO;
2609 rc = ata_dev_configure(dev);
2610 ap->link.eh_context.i.flags &= ~ATA_EHI_PRINTINFO;
2615 /* configure transfer mode */
2616 rc = ata_set_mode(&ap->link, &dev);
2620 ata_for_each_dev(dev, &ap->link, ENABLED)
2626 tries[dev->devno]--;
2630 /* eeek, something went very wrong, give up */
2631 tries[dev->devno] = 0;
2635 /* give it just one more chance */
2636 tries[dev->devno] = min(tries[dev->devno], 1);
2638 if (tries[dev->devno] == 1) {
2639 /* This is the last chance, better to slow
2640 * down than lose it.
2642 sata_down_spd_limit(&ap->link, 0);
2643 ata_down_xfermask_limit(dev, ATA_DNXFER_PIO);
2647 if (!tries[dev->devno])
2648 ata_dev_disable(dev);
2654 * sata_print_link_status - Print SATA link status
2655 * @link: SATA link to printk link status about
2657 * This function prints link speed and status of a SATA link.
2662 static void sata_print_link_status(struct ata_link *link)
2664 u32 sstatus, scontrol, tmp;
2666 if (sata_scr_read(link, SCR_STATUS, &sstatus))
2668 sata_scr_read(link, SCR_CONTROL, &scontrol);
2670 if (ata_phys_link_online(link)) {
2671 tmp = (sstatus >> 4) & 0xf;
2672 ata_link_info(link, "SATA link up %s (SStatus %X SControl %X)\n",
2673 sata_spd_string(tmp), sstatus, scontrol);
2675 ata_link_info(link, "SATA link down (SStatus %X SControl %X)\n",
2681 * ata_dev_pair - return other device on cable
2684 * Obtain the other device on the same cable, or if none is
2685 * present NULL is returned
2688 struct ata_device *ata_dev_pair(struct ata_device *adev)
2690 struct ata_link *link = adev->link;
2691 struct ata_device *pair = &link->device[1 - adev->devno];
2692 if (!ata_dev_enabled(pair))
2698 * sata_down_spd_limit - adjust SATA spd limit downward
2699 * @link: Link to adjust SATA spd limit for
2700 * @spd_limit: Additional limit
2702 * Adjust SATA spd limit of @link downward. Note that this
2703 * function only adjusts the limit. The change must be applied
2704 * using sata_set_spd().
2706 * If @spd_limit is non-zero, the speed is limited to equal to or
2707 * lower than @spd_limit if such speed is supported. If
2708 * @spd_limit is slower than any supported speed, only the lowest
2709 * supported speed is allowed.
2712 * Inherited from caller.
2715 * 0 on success, negative errno on failure
2717 int sata_down_spd_limit(struct ata_link *link, u32 spd_limit)
2719 u32 sstatus, spd, mask;
2722 if (!sata_scr_valid(link))
2725 /* If SCR can be read, use it to determine the current SPD.
2726 * If not, use cached value in link->sata_spd.
2728 rc = sata_scr_read(link, SCR_STATUS, &sstatus);
2729 if (rc == 0 && ata_sstatus_online(sstatus))
2730 spd = (sstatus >> 4) & 0xf;
2732 spd = link->sata_spd;
2734 mask = link->sata_spd_limit;
2738 /* unconditionally mask off the highest bit */
2739 bit = fls(mask) - 1;
2740 mask &= ~(1 << bit);
2742 /* Mask off all speeds higher than or equal to the current
2743 * one. Force 1.5Gbps if current SPD is not available.
2746 mask &= (1 << (spd - 1)) - 1;
2750 /* were we already at the bottom? */
2755 if (mask & ((1 << spd_limit) - 1))
2756 mask &= (1 << spd_limit) - 1;
2758 bit = ffs(mask) - 1;
2763 link->sata_spd_limit = mask;
2765 ata_link_warn(link, "limiting SATA link speed to %s\n",
2766 sata_spd_string(fls(mask)));
2771 static int __sata_set_spd_needed(struct ata_link *link, u32 *scontrol)
2773 struct ata_link *host_link = &link->ap->link;
2774 u32 limit, target, spd;
2776 limit = link->sata_spd_limit;
2778 /* Don't configure downstream link faster than upstream link.
2779 * It doesn't speed up anything and some PMPs choke on such
2782 if (!ata_is_host_link(link) && host_link->sata_spd)
2783 limit &= (1 << host_link->sata_spd) - 1;
2785 if (limit == UINT_MAX)
2788 target = fls(limit);
2790 spd = (*scontrol >> 4) & 0xf;
2791 *scontrol = (*scontrol & ~0xf0) | ((target & 0xf) << 4);
2793 return spd != target;
2797 * sata_set_spd_needed - is SATA spd configuration needed
2798 * @link: Link in question
2800 * Test whether the spd limit in SControl matches
2801 * @link->sata_spd_limit. This function is used to determine
2802 * whether hardreset is necessary to apply SATA spd
2806 * Inherited from caller.
2809 * 1 if SATA spd configuration is needed, 0 otherwise.
2811 static int sata_set_spd_needed(struct ata_link *link)
2815 if (sata_scr_read(link, SCR_CONTROL, &scontrol))
2818 return __sata_set_spd_needed(link, &scontrol);
2822 * sata_set_spd - set SATA spd according to spd limit
2823 * @link: Link to set SATA spd for
2825 * Set SATA spd of @link according to sata_spd_limit.
2828 * Inherited from caller.
2831 * 0 if spd doesn't need to be changed, 1 if spd has been
2832 * changed. Negative errno if SCR registers are inaccessible.
2834 int sata_set_spd(struct ata_link *link)
2839 if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
2842 if (!__sata_set_spd_needed(link, &scontrol))
2845 if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol)))
2852 * This mode timing computation functionality is ported over from
2853 * drivers/ide/ide-timing.h and was originally written by Vojtech Pavlik
2856 * PIO 0-4, MWDMA 0-2 and UDMA 0-6 timings (in nanoseconds).
2857 * These were taken from ATA/ATAPI-6 standard, rev 0a, except
2858 * for UDMA6, which is currently supported only by Maxtor drives.
2860 * For PIO 5/6 MWDMA 3/4 see the CFA specification 3.0.
2863 static const struct ata_timing ata_timing[] = {
2864 /* { XFER_PIO_SLOW, 120, 290, 240, 960, 290, 240, 0, 960, 0 }, */
2865 { XFER_PIO_0, 70, 290, 240, 600, 165, 150, 0, 600, 0 },
2866 { XFER_PIO_1, 50, 290, 93, 383, 125, 100, 0, 383, 0 },
2867 { XFER_PIO_2, 30, 290, 40, 330, 100, 90, 0, 240, 0 },
2868 { XFER_PIO_3, 30, 80, 70, 180, 80, 70, 0, 180, 0 },
2869 { XFER_PIO_4, 25, 70, 25, 120, 70, 25, 0, 120, 0 },
2870 { XFER_PIO_5, 15, 65, 25, 100, 65, 25, 0, 100, 0 },
2871 { XFER_PIO_6, 10, 55, 20, 80, 55, 20, 0, 80, 0 },
2873 { XFER_SW_DMA_0, 120, 0, 0, 0, 480, 480, 50, 960, 0 },
2874 { XFER_SW_DMA_1, 90, 0, 0, 0, 240, 240, 30, 480, 0 },
2875 { XFER_SW_DMA_2, 60, 0, 0, 0, 120, 120, 20, 240, 0 },
2877 { XFER_MW_DMA_0, 60, 0, 0, 0, 215, 215, 20, 480, 0 },
2878 { XFER_MW_DMA_1, 45, 0, 0, 0, 80, 50, 5, 150, 0 },
2879 { XFER_MW_DMA_2, 25, 0, 0, 0, 70, 25, 5, 120, 0 },
2880 { XFER_MW_DMA_3, 25, 0, 0, 0, 65, 25, 5, 100, 0 },
2881 { XFER_MW_DMA_4, 25, 0, 0, 0, 55, 20, 5, 80, 0 },
2883 /* { XFER_UDMA_SLOW, 0, 0, 0, 0, 0, 0, 0, 0, 150 }, */
2884 { XFER_UDMA_0, 0, 0, 0, 0, 0, 0, 0, 0, 120 },
2885 { XFER_UDMA_1, 0, 0, 0, 0, 0, 0, 0, 0, 80 },
2886 { XFER_UDMA_2, 0, 0, 0, 0, 0, 0, 0, 0, 60 },
2887 { XFER_UDMA_3, 0, 0, 0, 0, 0, 0, 0, 0, 45 },
2888 { XFER_UDMA_4, 0, 0, 0, 0, 0, 0, 0, 0, 30 },
2889 { XFER_UDMA_5, 0, 0, 0, 0, 0, 0, 0, 0, 20 },
2890 { XFER_UDMA_6, 0, 0, 0, 0, 0, 0, 0, 0, 15 },
2895 #define ENOUGH(v, unit) (((v)-1)/(unit)+1)
2896 #define EZ(v, unit) ((v)?ENOUGH(v, unit):0)
2898 static void ata_timing_quantize(const struct ata_timing *t, struct ata_timing *q, int T, int UT)
2900 q->setup = EZ(t->setup * 1000, T);
2901 q->act8b = EZ(t->act8b * 1000, T);
2902 q->rec8b = EZ(t->rec8b * 1000, T);
2903 q->cyc8b = EZ(t->cyc8b * 1000, T);
2904 q->active = EZ(t->active * 1000, T);
2905 q->recover = EZ(t->recover * 1000, T);
2906 q->dmack_hold = EZ(t->dmack_hold * 1000, T);
2907 q->cycle = EZ(t->cycle * 1000, T);
2908 q->udma = EZ(t->udma * 1000, UT);
2911 void ata_timing_merge(const struct ata_timing *a, const struct ata_timing *b,
2912 struct ata_timing *m, unsigned int what)
2914 if (what & ATA_TIMING_SETUP ) m->setup = max(a->setup, b->setup);
2915 if (what & ATA_TIMING_ACT8B ) m->act8b = max(a->act8b, b->act8b);
2916 if (what & ATA_TIMING_REC8B ) m->rec8b = max(a->rec8b, b->rec8b);
2917 if (what & ATA_TIMING_CYC8B ) m->cyc8b = max(a->cyc8b, b->cyc8b);
2918 if (what & ATA_TIMING_ACTIVE ) m->active = max(a->active, b->active);
2919 if (what & ATA_TIMING_RECOVER) m->recover = max(a->recover, b->recover);
2920 if (what & ATA_TIMING_DMACK_HOLD) m->dmack_hold = max(a->dmack_hold, b->dmack_hold);
2921 if (what & ATA_TIMING_CYCLE ) m->cycle = max(a->cycle, b->cycle);
2922 if (what & ATA_TIMING_UDMA ) m->udma = max(a->udma, b->udma);
2925 const struct ata_timing *ata_timing_find_mode(u8 xfer_mode)
2927 const struct ata_timing *t = ata_timing;
2929 while (xfer_mode > t->mode)
2932 if (xfer_mode == t->mode)
2937 int ata_timing_compute(struct ata_device *adev, unsigned short speed,
2938 struct ata_timing *t, int T, int UT)
2940 const u16 *id = adev->id;
2941 const struct ata_timing *s;
2942 struct ata_timing p;
2948 if (!(s = ata_timing_find_mode(speed)))
2951 memcpy(t, s, sizeof(*s));
2954 * If the drive is an EIDE drive, it can tell us it needs extended
2955 * PIO/MW_DMA cycle timing.
2958 if (id[ATA_ID_FIELD_VALID] & 2) { /* EIDE drive */
2959 memset(&p, 0, sizeof(p));
2961 if (speed >= XFER_PIO_0 && speed < XFER_SW_DMA_0) {
2962 if (speed <= XFER_PIO_2)
2963 p.cycle = p.cyc8b = id[ATA_ID_EIDE_PIO];
2964 else if ((speed <= XFER_PIO_4) ||
2965 (speed == XFER_PIO_5 && !ata_id_is_cfa(id)))
2966 p.cycle = p.cyc8b = id[ATA_ID_EIDE_PIO_IORDY];
2967 } else if (speed >= XFER_MW_DMA_0 && speed <= XFER_MW_DMA_2)
2968 p.cycle = id[ATA_ID_EIDE_DMA_MIN];
2970 ata_timing_merge(&p, t, t, ATA_TIMING_CYCLE | ATA_TIMING_CYC8B);
2974 * Convert the timing to bus clock counts.
2977 ata_timing_quantize(t, t, T, UT);
2980 * Even in DMA/UDMA modes we still use PIO access for IDENTIFY,
2981 * S.M.A.R.T * and some other commands. We have to ensure that the
2982 * DMA cycle timing is slower/equal than the fastest PIO timing.
2985 if (speed > XFER_PIO_6) {
2986 ata_timing_compute(adev, adev->pio_mode, &p, T, UT);
2987 ata_timing_merge(&p, t, t, ATA_TIMING_ALL);
2991 * Lengthen active & recovery time so that cycle time is correct.
2994 if (t->act8b + t->rec8b < t->cyc8b) {
2995 t->act8b += (t->cyc8b - (t->act8b + t->rec8b)) / 2;
2996 t->rec8b = t->cyc8b - t->act8b;
2999 if (t->active + t->recover < t->cycle) {
3000 t->active += (t->cycle - (t->active + t->recover)) / 2;
3001 t->recover = t->cycle - t->active;
3004 /* In a few cases quantisation may produce enough errors to
3005 leave t->cycle too low for the sum of active and recovery
3006 if so we must correct this */
3007 if (t->active + t->recover > t->cycle)
3008 t->cycle = t->active + t->recover;
3014 * ata_timing_cycle2mode - find xfer mode for the specified cycle duration
3015 * @xfer_shift: ATA_SHIFT_* value for transfer type to examine.
3016 * @cycle: cycle duration in ns
3018 * Return matching xfer mode for @cycle. The returned mode is of
3019 * the transfer type specified by @xfer_shift. If @cycle is too
3020 * slow for @xfer_shift, 0xff is returned. If @cycle is faster
3021 * than the fastest known mode, the fasted mode is returned.
3027 * Matching xfer_mode, 0xff if no match found.
3029 u8 ata_timing_cycle2mode(unsigned int xfer_shift, int cycle)
3031 u8 base_mode = 0xff, last_mode = 0xff;
3032 const struct ata_xfer_ent *ent;
3033 const struct ata_timing *t;
3035 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
3036 if (ent->shift == xfer_shift)
3037 base_mode = ent->base;
3039 for (t = ata_timing_find_mode(base_mode);
3040 t && ata_xfer_mode2shift(t->mode) == xfer_shift; t++) {
3041 unsigned short this_cycle;
3043 switch (xfer_shift) {
3045 case ATA_SHIFT_MWDMA:
3046 this_cycle = t->cycle;
3048 case ATA_SHIFT_UDMA:
3049 this_cycle = t->udma;
3055 if (cycle > this_cycle)
3058 last_mode = t->mode;
3065 * ata_down_xfermask_limit - adjust dev xfer masks downward
3066 * @dev: Device to adjust xfer masks
3067 * @sel: ATA_DNXFER_* selector
3069 * Adjust xfer masks of @dev downward. Note that this function
3070 * does not apply the change. Invoking ata_set_mode() afterwards
3071 * will apply the limit.
3074 * Inherited from caller.
3077 * 0 on success, negative errno on failure
3079 int ata_down_xfermask_limit(struct ata_device *dev, unsigned int sel)
3082 unsigned long orig_mask, xfer_mask;
3083 unsigned long pio_mask, mwdma_mask, udma_mask;
3086 quiet = !!(sel & ATA_DNXFER_QUIET);
3087 sel &= ~ATA_DNXFER_QUIET;
3089 xfer_mask = orig_mask = ata_pack_xfermask(dev->pio_mask,
3092 ata_unpack_xfermask(xfer_mask, &pio_mask, &mwdma_mask, &udma_mask);
3095 case ATA_DNXFER_PIO:
3096 highbit = fls(pio_mask) - 1;
3097 pio_mask &= ~(1 << highbit);
3100 case ATA_DNXFER_DMA:
3102 highbit = fls(udma_mask) - 1;
3103 udma_mask &= ~(1 << highbit);
3106 } else if (mwdma_mask) {
3107 highbit = fls(mwdma_mask) - 1;
3108 mwdma_mask &= ~(1 << highbit);
3114 case ATA_DNXFER_40C:
3115 udma_mask &= ATA_UDMA_MASK_40C;
3118 case ATA_DNXFER_FORCE_PIO0:
3120 case ATA_DNXFER_FORCE_PIO:
3129 xfer_mask &= ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask);
3131 if (!(xfer_mask & ATA_MASK_PIO) || xfer_mask == orig_mask)
3135 if (xfer_mask & (ATA_MASK_MWDMA | ATA_MASK_UDMA))
3136 snprintf(buf, sizeof(buf), "%s:%s",
3137 ata_mode_string(xfer_mask),
3138 ata_mode_string(xfer_mask & ATA_MASK_PIO));
3140 snprintf(buf, sizeof(buf), "%s",
3141 ata_mode_string(xfer_mask));
3143 ata_dev_warn(dev, "limiting speed to %s\n", buf);
3146 ata_unpack_xfermask(xfer_mask, &dev->pio_mask, &dev->mwdma_mask,
3152 static int ata_dev_set_mode(struct ata_device *dev)
3154 struct ata_port *ap = dev->link->ap;
3155 struct ata_eh_context *ehc = &dev->link->eh_context;
3156 const bool nosetxfer = dev->horkage & ATA_HORKAGE_NOSETXFER;
3157 const char *dev_err_whine = "";
3158 int ign_dev_err = 0;
3159 unsigned int err_mask = 0;
3162 dev->flags &= ~ATA_DFLAG_PIO;
3163 if (dev->xfer_shift == ATA_SHIFT_PIO)
3164 dev->flags |= ATA_DFLAG_PIO;
3166 if (nosetxfer && ap->flags & ATA_FLAG_SATA && ata_id_is_sata(dev->id))
3167 dev_err_whine = " (SET_XFERMODE skipped)";
3171 "NOSETXFER but PATA detected - can't "
3172 "skip SETXFER, might malfunction\n");
3173 err_mask = ata_dev_set_xfermode(dev);
3176 if (err_mask & ~AC_ERR_DEV)
3180 ehc->i.flags |= ATA_EHI_POST_SETMODE;
3181 rc = ata_dev_revalidate(dev, ATA_DEV_UNKNOWN, 0);
3182 ehc->i.flags &= ~ATA_EHI_POST_SETMODE;
3186 if (dev->xfer_shift == ATA_SHIFT_PIO) {
3187 /* Old CFA may refuse this command, which is just fine */
3188 if (ata_id_is_cfa(dev->id))
3190 /* Catch several broken garbage emulations plus some pre
3192 if (ata_id_major_version(dev->id) == 0 &&
3193 dev->pio_mode <= XFER_PIO_2)
3195 /* Some very old devices and some bad newer ones fail
3196 any kind of SET_XFERMODE request but support PIO0-2
3197 timings and no IORDY */
3198 if (!ata_id_has_iordy(dev->id) && dev->pio_mode <= XFER_PIO_2)
3201 /* Early MWDMA devices do DMA but don't allow DMA mode setting.
3202 Don't fail an MWDMA0 set IFF the device indicates it is in MWDMA0 */
3203 if (dev->xfer_shift == ATA_SHIFT_MWDMA &&
3204 dev->dma_mode == XFER_MW_DMA_0 &&
3205 (dev->id[63] >> 8) & 1)
3208 /* if the device is actually configured correctly, ignore dev err */
3209 if (dev->xfer_mode == ata_xfer_mask2mode(ata_id_xfermask(dev->id)))
3212 if (err_mask & AC_ERR_DEV) {
3216 dev_err_whine = " (device error ignored)";
3219 DPRINTK("xfer_shift=%u, xfer_mode=0x%x\n",
3220 dev->xfer_shift, (int)dev->xfer_mode);
3222 ata_dev_info(dev, "configured for %s%s\n",
3223 ata_mode_string(ata_xfer_mode2mask(dev->xfer_mode)),
3229 ata_dev_err(dev, "failed to set xfermode (err_mask=0x%x)\n", err_mask);
3234 * ata_do_set_mode - Program timings and issue SET FEATURES - XFER
3235 * @link: link on which timings will be programmed
3236 * @r_failed_dev: out parameter for failed device
3238 * Standard implementation of the function used to tune and set
3239 * ATA device disk transfer mode (PIO3, UDMA6, etc.). If
3240 * ata_dev_set_mode() fails, pointer to the failing device is
3241 * returned in @r_failed_dev.
3244 * PCI/etc. bus probe sem.
3247 * 0 on success, negative errno otherwise
3250 int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev)
3252 struct ata_port *ap = link->ap;
3253 struct ata_device *dev;
3254 int rc = 0, used_dma = 0, found = 0;
3256 /* step 1: calculate xfer_mask */
3257 ata_for_each_dev(dev, link, ENABLED) {
3258 unsigned long pio_mask, dma_mask;
3259 unsigned int mode_mask;
3261 mode_mask = ATA_DMA_MASK_ATA;
3262 if (dev->class == ATA_DEV_ATAPI)
3263 mode_mask = ATA_DMA_MASK_ATAPI;
3264 else if (ata_id_is_cfa(dev->id))
3265 mode_mask = ATA_DMA_MASK_CFA;
3267 ata_dev_xfermask(dev);
3268 ata_force_xfermask(dev);
3270 pio_mask = ata_pack_xfermask(dev->pio_mask, 0, 0);
3271 dma_mask = ata_pack_xfermask(0, dev->mwdma_mask, dev->udma_mask);
3273 if (libata_dma_mask & mode_mask)
3274 dma_mask = ata_pack_xfermask(0, dev->mwdma_mask, dev->udma_mask);
3278 dev->pio_mode = ata_xfer_mask2mode(pio_mask);
3279 dev->dma_mode = ata_xfer_mask2mode(dma_mask);
3282 if (ata_dma_enabled(dev))
3288 /* step 2: always set host PIO timings */
3289 ata_for_each_dev(dev, link, ENABLED) {
3290 if (dev->pio_mode == 0xff) {
3291 ata_dev_warn(dev, "no PIO support\n");
3296 dev->xfer_mode = dev->pio_mode;
3297 dev->xfer_shift = ATA_SHIFT_PIO;
3298 if (ap->ops->set_piomode)
3299 ap->ops->set_piomode(ap, dev);
3302 /* step 3: set host DMA timings */
3303 ata_for_each_dev(dev, link, ENABLED) {
3304 if (!ata_dma_enabled(dev))
3307 dev->xfer_mode = dev->dma_mode;
3308 dev->xfer_shift = ata_xfer_mode2shift(dev->dma_mode);
3309 if (ap->ops->set_dmamode)
3310 ap->ops->set_dmamode(ap, dev);
3313 /* step 4: update devices' xfer mode */
3314 ata_for_each_dev(dev, link, ENABLED) {
3315 rc = ata_dev_set_mode(dev);
3320 /* Record simplex status. If we selected DMA then the other
3321 * host channels are not permitted to do so.
3323 if (used_dma && (ap->host->flags & ATA_HOST_SIMPLEX))
3324 ap->host->simplex_claimed = ap;
3328 *r_failed_dev = dev;
3333 * ata_wait_ready - wait for link to become ready
3334 * @link: link to be waited on
3335 * @deadline: deadline jiffies for the operation
3336 * @check_ready: callback to check link readiness
3338 * Wait for @link to become ready. @check_ready should return
3339 * positive number if @link is ready, 0 if it isn't, -ENODEV if
3340 * link doesn't seem to be occupied, other errno for other error
3343 * Transient -ENODEV conditions are allowed for
3344 * ATA_TMOUT_FF_WAIT.
3350 * 0 if @linke is ready before @deadline; otherwise, -errno.
3352 int ata_wait_ready(struct ata_link *link, unsigned long deadline,
3353 int (*check_ready)(struct ata_link *link))
3355 unsigned long start = jiffies;
3356 unsigned long nodev_deadline;
3359 /* choose which 0xff timeout to use, read comment in libata.h */
3360 if (link->ap->host->flags & ATA_HOST_PARALLEL_SCAN)
3361 nodev_deadline = ata_deadline(start, ATA_TMOUT_FF_WAIT_LONG);
3363 nodev_deadline = ata_deadline(start, ATA_TMOUT_FF_WAIT);
3365 /* Slave readiness can't be tested separately from master. On
3366 * M/S emulation configuration, this function should be called
3367 * only on the master and it will handle both master and slave.
3369 WARN_ON(link == link->ap->slave_link);
3371 if (time_after(nodev_deadline, deadline))
3372 nodev_deadline = deadline;
3375 unsigned long now = jiffies;
3378 ready = tmp = check_ready(link);
3383 * -ENODEV could be transient. Ignore -ENODEV if link
3384 * is online. Also, some SATA devices take a long
3385 * time to clear 0xff after reset. Wait for
3386 * ATA_TMOUT_FF_WAIT[_LONG] on -ENODEV if link isn't
3389 * Note that some PATA controllers (pata_ali) explode
3390 * if status register is read more than once when
3391 * there's no device attached.
3393 if (ready == -ENODEV) {
3394 if (ata_link_online(link))
3396 else if ((link->ap->flags & ATA_FLAG_SATA) &&
3397 !ata_link_offline(link) &&
3398 time_before(now, nodev_deadline))
3404 if (time_after(now, deadline))
3407 if (!warned && time_after(now, start + 5 * HZ) &&
3408 (deadline - now > 3 * HZ)) {
3410 "link is slow to respond, please be patient "
3411 "(ready=%d)\n", tmp);
3415 ata_msleep(link->ap, 50);
3420 * ata_wait_after_reset - wait for link to become ready after reset
3421 * @link: link to be waited on
3422 * @deadline: deadline jiffies for the operation
3423 * @check_ready: callback to check link readiness
3425 * Wait for @link to become ready after reset.
3431 * 0 if @linke is ready before @deadline; otherwise, -errno.
3433 int ata_wait_after_reset(struct ata_link *link, unsigned long deadline,
3434 int (*check_ready)(struct ata_link *link))
3436 ata_msleep(link->ap, ATA_WAIT_AFTER_RESET);
3438 return ata_wait_ready(link, deadline, check_ready);
3442 * sata_link_debounce - debounce SATA phy status
3443 * @link: ATA link to debounce SATA phy status for
3444 * @params: timing parameters { interval, duratinon, timeout } in msec
3445 * @deadline: deadline jiffies for the operation
3447 * Make sure SStatus of @link reaches stable state, determined by
3448 * holding the same value where DET is not 1 for @duration polled
3449 * every @interval, before @timeout. Timeout constraints the
3450 * beginning of the stable state. Because DET gets stuck at 1 on
3451 * some controllers after hot unplugging, this functions waits
3452 * until timeout then returns 0 if DET is stable at 1.
3454 * @timeout is further limited by @deadline. The sooner of the
3458 * Kernel thread context (may sleep)
3461 * 0 on success, -errno on failure.
3463 int sata_link_debounce(struct ata_link *link, const unsigned long *params,
3464 unsigned long deadline)
3466 unsigned long interval = params[0];
3467 unsigned long duration = params[1];
3468 unsigned long last_jiffies, t;
3472 t = ata_deadline(jiffies, params[2]);
3473 if (time_before(t, deadline))
3476 if ((rc = sata_scr_read(link, SCR_STATUS, &cur)))
3481 last_jiffies = jiffies;
3484 ata_msleep(link->ap, interval);
3485 if ((rc = sata_scr_read(link, SCR_STATUS, &cur)))
3491 if (cur == 1 && time_before(jiffies, deadline))
3493 if (time_after(jiffies,
3494 ata_deadline(last_jiffies, duration)))
3499 /* unstable, start over */
3501 last_jiffies = jiffies;
3503 /* Check deadline. If debouncing failed, return
3504 * -EPIPE to tell upper layer to lower link speed.
3506 if (time_after(jiffies, deadline))
3512 * sata_link_resume - resume SATA link
3513 * @link: ATA link to resume SATA
3514 * @params: timing parameters { interval, duratinon, timeout } in msec
3515 * @deadline: deadline jiffies for the operation
3517 * Resume SATA phy @link and debounce it.
3520 * Kernel thread context (may sleep)
3523 * 0 on success, -errno on failure.
3525 int sata_link_resume(struct ata_link *link, const unsigned long *params,
3526 unsigned long deadline)
3528 int tries = ATA_LINK_RESUME_TRIES;
3529 u32 scontrol, serror;
3532 if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
3536 * Writes to SControl sometimes get ignored under certain
3537 * controllers (ata_piix SIDPR). Make sure DET actually is
3541 scontrol = (scontrol & 0x0f0) | 0x300;
3542 if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol)))
3545 * Some PHYs react badly if SStatus is pounded
3546 * immediately after resuming. Delay 200ms before
3549 ata_msleep(link->ap, 200);
3551 /* is SControl restored correctly? */
3552 if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
3554 } while ((scontrol & 0xf0f) != 0x300 && --tries);
3556 if ((scontrol & 0xf0f) != 0x300) {
3557 ata_link_warn(link, "failed to resume link (SControl %X)\n",
3562 if (tries < ATA_LINK_RESUME_TRIES)
3563 ata_link_warn(link, "link resume succeeded after %d retries\n",
3564 ATA_LINK_RESUME_TRIES - tries);
3566 if ((rc = sata_link_debounce(link, params, deadline)))
3569 /* clear SError, some PHYs require this even for SRST to work */
3570 if (!(rc = sata_scr_read(link, SCR_ERROR, &serror)))
3571 rc = sata_scr_write(link, SCR_ERROR, serror);
3573 return rc != -EINVAL ? rc : 0;
3577 * sata_link_scr_lpm - manipulate SControl IPM and SPM fields
3578 * @link: ATA link to manipulate SControl for
3579 * @policy: LPM policy to configure
3580 * @spm_wakeup: initiate LPM transition to active state
3582 * Manipulate the IPM field of the SControl register of @link
3583 * according to @policy. If @policy is ATA_LPM_MAX_POWER and
3584 * @spm_wakeup is %true, the SPM field is manipulated to wake up
3585 * the link. This function also clears PHYRDY_CHG before
3592 * 0 on succes, -errno otherwise.
3594 int sata_link_scr_lpm(struct ata_link *link, enum ata_lpm_policy policy,
3597 struct ata_eh_context *ehc = &link->eh_context;
3598 bool woken_up = false;
3602 rc = sata_scr_read(link, SCR_CONTROL, &scontrol);
3607 case ATA_LPM_MAX_POWER:
3608 /* disable all LPM transitions */
3609 scontrol |= (0x3 << 8);
3610 /* initiate transition to active state */
3612 scontrol |= (0x4 << 12);
3616 case ATA_LPM_MED_POWER:
3617 /* allow LPM to PARTIAL */
3618 scontrol &= ~(0x1 << 8);
3619 scontrol |= (0x2 << 8);
3621 case ATA_LPM_MIN_POWER:
3622 if (ata_link_nr_enabled(link) > 0)
3623 /* no restrictions on LPM transitions */
3624 scontrol &= ~(0x3 << 8);
3626 /* empty port, power off */
3628 scontrol |= (0x1 << 2);
3635 rc = sata_scr_write(link, SCR_CONTROL, scontrol);
3639 /* give the link time to transit out of LPM state */
3643 /* clear PHYRDY_CHG from SError */
3644 ehc->i.serror &= ~SERR_PHYRDY_CHG;
3645 return sata_scr_write(link, SCR_ERROR, SERR_PHYRDY_CHG);
3649 * ata_std_prereset - prepare for reset
3650 * @link: ATA link to be reset
3651 * @deadline: deadline jiffies for the operation
3653 * @link is about to be reset. Initialize it. Failure from
3654 * prereset makes libata abort whole reset sequence and give up
3655 * that port, so prereset should be best-effort. It does its
3656 * best to prepare for reset sequence but if things go wrong, it
3657 * should just whine, not fail.
3660 * Kernel thread context (may sleep)
3663 * 0 on success, -errno otherwise.
3665 int ata_std_prereset(struct ata_link *link, unsigned long deadline)
3667 struct ata_port *ap = link->ap;
3668 struct ata_eh_context *ehc = &link->eh_context;
3669 const unsigned long *timing = sata_ehc_deb_timing(ehc);
3672 /* if we're about to do hardreset, nothing more to do */
3673 if (ehc->i.action & ATA_EH_HARDRESET)
3676 /* if SATA, resume link */
3677 if (ap->flags & ATA_FLAG_SATA) {
3678 rc = sata_link_resume(link, timing, deadline);
3679 /* whine about phy resume failure but proceed */
3680 if (rc && rc != -EOPNOTSUPP)
3682 "failed to resume link for reset (errno=%d)\n",
3686 /* no point in trying softreset on offline link */
3687 if (ata_phys_link_offline(link))
3688 ehc->i.action &= ~ATA_EH_SOFTRESET;
3694 * sata_link_hardreset - reset link via SATA phy reset
3695 * @link: link to reset
3696 * @timing: timing parameters { interval, duratinon, timeout } in msec
3697 * @deadline: deadline jiffies for the operation
3698 * @online: optional out parameter indicating link onlineness
3699 * @check_ready: optional callback to check link readiness
3701 * SATA phy-reset @link using DET bits of SControl register.
3702 * After hardreset, link readiness is waited upon using
3703 * ata_wait_ready() if @check_ready is specified. LLDs are
3704 * allowed to not specify @check_ready and wait itself after this
3705 * function returns. Device classification is LLD's
3708 * *@online is set to one iff reset succeeded and @link is online
3712 * Kernel thread context (may sleep)
3715 * 0 on success, -errno otherwise.
3717 int sata_link_hardreset(struct ata_link *link, const unsigned long *timing,
3718 unsigned long deadline,
3719 bool *online, int (*check_ready)(struct ata_link *))
3729 if (sata_set_spd_needed(link)) {
3730 /* SATA spec says nothing about how to reconfigure
3731 * spd. To be on the safe side, turn off phy during
3732 * reconfiguration. This works for at least ICH7 AHCI
3735 if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
3738 scontrol = (scontrol & 0x0f0) | 0x304;
3740 if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol)))
3746 /* issue phy wake/reset */
3747 if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
3750 scontrol = (scontrol & 0x0f0) | 0x301;
3752 if ((rc = sata_scr_write_flush(link, SCR_CONTROL, scontrol)))
3755 /* Couldn't find anything in SATA I/II specs, but AHCI-1.1
3756 * 10.4.2 says at least 1 ms.
3758 ata_msleep(link->ap, 1);
3760 /* bring link back */
3761 rc = sata_link_resume(link, timing, deadline);
3764 /* if link is offline nothing more to do */
3765 if (ata_phys_link_offline(link))
3768 /* Link is online. From this point, -ENODEV too is an error. */
3772 if (sata_pmp_supported(link->ap) && ata_is_host_link(link)) {
3773 /* If PMP is supported, we have to do follow-up SRST.
3774 * Some PMPs don't send D2H Reg FIS after hardreset if
3775 * the first port is empty. Wait only for
3776 * ATA_TMOUT_PMP_SRST_WAIT.
3779 unsigned long pmp_deadline;
3781 pmp_deadline = ata_deadline(jiffies,
3782 ATA_TMOUT_PMP_SRST_WAIT);
3783 if (time_after(pmp_deadline, deadline))
3784 pmp_deadline = deadline;
3785 ata_wait_ready(link, pmp_deadline, check_ready);
3793 rc = ata_wait_ready(link, deadline, check_ready);
3795 if (rc && rc != -EAGAIN) {
3796 /* online is set iff link is online && reset succeeded */
3799 ata_link_err(link, "COMRESET failed (errno=%d)\n", rc);
3801 DPRINTK("EXIT, rc=%d\n", rc);
3806 * sata_std_hardreset - COMRESET w/o waiting or classification
3807 * @link: link to reset
3808 * @class: resulting class of attached device
3809 * @deadline: deadline jiffies for the operation
3811 * Standard SATA COMRESET w/o waiting or classification.
3814 * Kernel thread context (may sleep)
3817 * 0 if link offline, -EAGAIN if link online, -errno on errors.
3819 int sata_std_hardreset(struct ata_link *link, unsigned int *class,
3820 unsigned long deadline)
3822 const unsigned long *timing = sata_ehc_deb_timing(&link->eh_context);
3827 rc = sata_link_hardreset(link, timing, deadline, &online, NULL);
3828 return online ? -EAGAIN : rc;
3832 * ata_std_postreset - standard postreset callback
3833 * @link: the target ata_link
3834 * @classes: classes of attached devices
3836 * This function is invoked after a successful reset. Note that
3837 * the device might have been reset more than once using
3838 * different reset methods before postreset is invoked.
3841 * Kernel thread context (may sleep)
3843 void ata_std_postreset(struct ata_link *link, unsigned int *classes)
3849 /* reset complete, clear SError */
3850 if (!sata_scr_read(link, SCR_ERROR, &serror))
3851 sata_scr_write(link, SCR_ERROR, serror);
3853 /* print link status */
3854 sata_print_link_status(link);
3860 * ata_dev_same_device - Determine whether new ID matches configured device
3861 * @dev: device to compare against
3862 * @new_class: class of the new device
3863 * @new_id: IDENTIFY page of the new device
3865 * Compare @new_class and @new_id against @dev and determine
3866 * whether @dev is the device indicated by @new_class and
3873 * 1 if @dev matches @new_class and @new_id, 0 otherwise.
3875 static int ata_dev_same_device(struct ata_device *dev, unsigned int new_class,
3878 const u16 *old_id = dev->id;
3879 unsigned char model[2][ATA_ID_PROD_LEN + 1];
3880 unsigned char serial[2][ATA_ID_SERNO_LEN + 1];
3882 if (dev->class != new_class) {
3883 ata_dev_info(dev, "class mismatch %d != %d\n",
3884 dev->class, new_class);
3888 ata_id_c_string(old_id, model[0], ATA_ID_PROD, sizeof(model[0]));
3889 ata_id_c_string(new_id, model[1], ATA_ID_PROD, sizeof(model[1]));
3890 ata_id_c_string(old_id, serial[0], ATA_ID_SERNO, sizeof(serial[0]));
3891 ata_id_c_string(new_id, serial[1], ATA_ID_SERNO, sizeof(serial[1]));
3893 if (strcmp(model[0], model[1])) {
3894 ata_dev_info(dev, "model number mismatch '%s' != '%s'\n",
3895 model[0], model[1]);
3899 if (strcmp(serial[0], serial[1])) {
3900 ata_dev_info(dev, "serial number mismatch '%s' != '%s'\n",
3901 serial[0], serial[1]);
3909 * ata_dev_reread_id - Re-read IDENTIFY data
3910 * @dev: target ATA device
3911 * @readid_flags: read ID flags
3913 * Re-read IDENTIFY page and make sure @dev is still attached to
3917 * Kernel thread context (may sleep)
3920 * 0 on success, negative errno otherwise
3922 int ata_dev_reread_id(struct ata_device *dev, unsigned int readid_flags)
3924 unsigned int class = dev->class;
3925 u16 *id = (void *)dev->link->ap->sector_buf;
3929 rc = ata_dev_read_id(dev, &class, readid_flags, id);
3933 /* is the device still there? */
3934 if (!ata_dev_same_device(dev, class, id))
3937 memcpy(dev->id, id, sizeof(id[0]) * ATA_ID_WORDS);
3942 * ata_dev_revalidate - Revalidate ATA device
3943 * @dev: device to revalidate
3944 * @new_class: new class code
3945 * @readid_flags: read ID flags
3947 * Re-read IDENTIFY page, make sure @dev is still attached to the
3948 * port and reconfigure it according to the new IDENTIFY page.
3951 * Kernel thread context (may sleep)
3954 * 0 on success, negative errno otherwise
3956 int ata_dev_revalidate(struct ata_device *dev, unsigned int new_class,
3957 unsigned int readid_flags)
3959 u64 n_sectors = dev->n_sectors;
3960 u64 n_native_sectors = dev->n_native_sectors;
3963 if (!ata_dev_enabled(dev))
3966 /* fail early if !ATA && !ATAPI to avoid issuing [P]IDENTIFY to PMP */
3967 if (ata_class_enabled(new_class) &&
3968 new_class != ATA_DEV_ATA &&
3969 new_class != ATA_DEV_ATAPI &&
3970 new_class != ATA_DEV_SEMB) {
3971 ata_dev_info(dev, "class mismatch %u != %u\n",
3972 dev->class, new_class);
3978 rc = ata_dev_reread_id(dev, readid_flags);
3982 /* configure device according to the new ID */
3983 rc = ata_dev_configure(dev);
3987 /* verify n_sectors hasn't changed */
3988 if (dev->class != ATA_DEV_ATA || !n_sectors ||
3989 dev->n_sectors == n_sectors)
3992 /* n_sectors has changed */
3993 ata_dev_warn(dev, "n_sectors mismatch %llu != %llu\n",
3994 (unsigned long long)n_sectors,
3995 (unsigned long long)dev->n_sectors);
3998 * Something could have caused HPA to be unlocked
3999 * involuntarily. If n_native_sectors hasn't changed and the
4000 * new size matches it, keep the device.
4002 if (dev->n_native_sectors == n_native_sectors &&
4003 dev->n_sectors > n_sectors && dev->n_sectors == n_native_sectors) {
4005 "new n_sectors matches native, probably "
4006 "late HPA unlock, n_sectors updated\n");
4007 /* use the larger n_sectors */
4012 * Some BIOSes boot w/o HPA but resume w/ HPA locked. Try
4013 * unlocking HPA in those cases.
4015 * https://bugzilla.kernel.org/show_bug.cgi?id=15396
4017 if (dev->n_native_sectors == n_native_sectors &&
4018 dev->n_sectors < n_sectors && n_sectors == n_native_sectors &&
4019 !(dev->horkage & ATA_HORKAGE_BROKEN_HPA)) {
4021 "old n_sectors matches native, probably "
4022 "late HPA lock, will try to unlock HPA\n");
4023 /* try unlocking HPA */
4024 dev->flags |= ATA_DFLAG_UNLOCK_HPA;
4029 /* restore original n_[native_]sectors and fail */
4030 dev->n_native_sectors = n_native_sectors;
4031 dev->n_sectors = n_sectors;
4033 ata_dev_err(dev, "revalidation failed (errno=%d)\n", rc);
4037 struct ata_blacklist_entry {
4038 const char *model_num;
4039 const char *model_rev;
4040 unsigned long horkage;
4043 static const struct ata_blacklist_entry ata_device_blacklist [] = {
4044 /* Devices with DMA related problems under Linux */
4045 { "WDC AC11000H", NULL, ATA_HORKAGE_NODMA },
4046 { "WDC AC22100H", NULL, ATA_HORKAGE_NODMA },
4047 { "WDC AC32500H", NULL, ATA_HORKAGE_NODMA },
4048 { "WDC AC33100H", NULL, ATA_HORKAGE_NODMA },
4049 { "WDC AC31600H", NULL, ATA_HORKAGE_NODMA },
4050 { "WDC AC32100H", "24.09P07", ATA_HORKAGE_NODMA },
4051 { "WDC AC23200L", "21.10N21", ATA_HORKAGE_NODMA },
4052 { "Compaq CRD-8241B", NULL, ATA_HORKAGE_NODMA },
4053 { "CRD-8400B", NULL, ATA_HORKAGE_NODMA },
4054 { "CRD-848[02]B", NULL, ATA_HORKAGE_NODMA },
4055 { "CRD-84", NULL, ATA_HORKAGE_NODMA },
4056 { "SanDisk SDP3B", NULL, ATA_HORKAGE_NODMA },
4057 { "SanDisk SDP3B-64", NULL, ATA_HORKAGE_NODMA },
4058 { "SANYO CD-ROM CRD", NULL, ATA_HORKAGE_NODMA },
4059 { "HITACHI CDR-8", NULL, ATA_HORKAGE_NODMA },
4060 { "HITACHI CDR-8[34]35",NULL, ATA_HORKAGE_NODMA },
4061 { "Toshiba CD-ROM XM-6202B", NULL, ATA_HORKAGE_NODMA },
4062 { "TOSHIBA CD-ROM XM-1702BC", NULL, ATA_HORKAGE_NODMA },
4063 { "CD-532E-A", NULL, ATA_HORKAGE_NODMA },
4064 { "E-IDE CD-ROM CR-840",NULL, ATA_HORKAGE_NODMA },
4065 { "CD-ROM Drive/F5A", NULL, ATA_HORKAGE_NODMA },
4066 { "WPI CDD-820", NULL, ATA_HORKAGE_NODMA },
4067 { "SAMSUNG CD-ROM SC-148C", NULL, ATA_HORKAGE_NODMA },
4068 { "SAMSUNG CD-ROM SC", NULL, ATA_HORKAGE_NODMA },
4069 { "ATAPI CD-ROM DRIVE 40X MAXIMUM",NULL,ATA_HORKAGE_NODMA },
4070 { "_NEC DV5800A", NULL, ATA_HORKAGE_NODMA },
4071 { "SAMSUNG CD-ROM SN-124", "N001", ATA_HORKAGE_NODMA },
4072 { "Seagate STT20000A", NULL, ATA_HORKAGE_NODMA },
4073 /* Odd clown on sil3726/4726 PMPs */
4074 { "Config Disk", NULL, ATA_HORKAGE_DISABLE },
4076 /* Weird ATAPI devices */
4077 { "TORiSAN DVD-ROM DRD-N216", NULL, ATA_HORKAGE_MAX_SEC_128 },
4078 { "QUANTUM DAT DAT72-000", NULL, ATA_HORKAGE_ATAPI_MOD16_DMA },
4079 { "Slimtype DVD A DS8A8SH", NULL, ATA_HORKAGE_MAX_SEC_LBA48 },
4080 { "Slimtype DVD A DS8A9SH", NULL, ATA_HORKAGE_MAX_SEC_LBA48 },
4082 /* Devices we expect to fail diagnostics */
4084 /* Devices where NCQ should be avoided */
4086 { "WDC WD740ADFD-00", NULL, ATA_HORKAGE_NONCQ },
4087 { "WDC WD740ADFD-00NLR1", NULL, ATA_HORKAGE_NONCQ, },
4088 /* http://thread.gmane.org/gmane.linux.ide/14907 */
4089 { "FUJITSU MHT2060BH", NULL, ATA_HORKAGE_NONCQ },
4091 { "Maxtor *", "BANC*", ATA_HORKAGE_NONCQ },
4092 { "Maxtor 7V300F0", "VA111630", ATA_HORKAGE_NONCQ },
4093 { "ST380817AS", "3.42", ATA_HORKAGE_NONCQ },
4094 { "ST3160023AS", "3.42", ATA_HORKAGE_NONCQ },
4095 { "OCZ CORE_SSD", "02.10104", ATA_HORKAGE_NONCQ },
4097 /* Seagate NCQ + FLUSH CACHE firmware bug */
4098 { "ST31500341AS", "SD1[5-9]", ATA_HORKAGE_NONCQ |
4099 ATA_HORKAGE_FIRMWARE_WARN },
4101 { "ST31000333AS", "SD1[5-9]", ATA_HORKAGE_NONCQ |
4102 ATA_HORKAGE_FIRMWARE_WARN },
4104 { "ST3640[36]23AS", "SD1[5-9]", ATA_HORKAGE_NONCQ |
4105 ATA_HORKAGE_FIRMWARE_WARN },
4107 { "ST3320[68]13AS", "SD1[5-9]", ATA_HORKAGE_NONCQ |
4108 ATA_HORKAGE_FIRMWARE_WARN },
4110 /* drives which fail FPDMA_AA activation (some may freeze afterwards) */
4111 { "ST1000LM024 HN-M101MBB", "2AR10001", ATA_HORKAGE_BROKEN_FPDMA_AA },
4112 { "ST1000LM024 HN-M101MBB", "2BA30001", ATA_HORKAGE_BROKEN_FPDMA_AA },
4113 { "VB0250EAVER", "HPG7", ATA_HORKAGE_BROKEN_FPDMA_AA },
4115 /* Blacklist entries taken from Silicon Image 3124/3132
4116 Windows driver .inf file - also several Linux problem reports */
4117 { "HTS541060G9SA00", "MB3OC60D", ATA_HORKAGE_NONCQ, },
4118 { "HTS541080G9SA00", "MB4OC60D", ATA_HORKAGE_NONCQ, },
4119 { "HTS541010G9SA00", "MBZOC60D", ATA_HORKAGE_NONCQ, },
4121 /* https://bugzilla.kernel.org/show_bug.cgi?id=15573 */
4122 { "C300-CTFDDAC128MAG", "0001", ATA_HORKAGE_NONCQ, },
4124 /* devices which puke on READ_NATIVE_MAX */
4125 { "HDS724040KLSA80", "KFAOA20N", ATA_HORKAGE_BROKEN_HPA, },
4126 { "WDC WD3200JD-00KLB0", "WD-WCAMR1130137", ATA_HORKAGE_BROKEN_HPA },
4127 { "WDC WD2500JD-00HBB0", "WD-WMAL71490727", ATA_HORKAGE_BROKEN_HPA },
4128 { "MAXTOR 6L080L4", "A93.0500", ATA_HORKAGE_BROKEN_HPA },
4130 /* this one allows HPA unlocking but fails IOs on the area */
4131 { "OCZ-VERTEX", "1.30", ATA_HORKAGE_BROKEN_HPA },
4133 /* Devices which report 1 sector over size HPA */
4134 { "ST340823A", NULL, ATA_HORKAGE_HPA_SIZE, },
4135 { "ST320413A", NULL, ATA_HORKAGE_HPA_SIZE, },
4136 { "ST310211A", NULL, ATA_HORKAGE_HPA_SIZE, },
4138 /* Devices which get the IVB wrong */
4139 { "QUANTUM FIREBALLlct10 05", "A03.0900", ATA_HORKAGE_IVB, },
4140 /* Maybe we should just blacklist TSSTcorp... */
4141 { "TSSTcorp CDDVDW SH-S202[HJN]", "SB0[01]", ATA_HORKAGE_IVB, },
4143 /* Devices that do not need bridging limits applied */
4144 { "MTRON MSP-SATA*", NULL, ATA_HORKAGE_BRIDGE_OK, },
4146 /* Devices which aren't very happy with higher link speeds */
4147 { "WD My Book", NULL, ATA_HORKAGE_1_5_GBPS, },
4148 { "Seagate FreeAgent GoFlex", NULL, ATA_HORKAGE_1_5_GBPS, },
4151 * Devices which choke on SETXFER. Applies only if both the
4152 * device and controller are SATA.
4154 { "PIONEER DVD-RW DVRTD08", NULL, ATA_HORKAGE_NOSETXFER },
4155 { "PIONEER DVD-RW DVR-212D", NULL, ATA_HORKAGE_NOSETXFER },
4156 { "PIONEER DVD-RW DVR-216D", NULL, ATA_HORKAGE_NOSETXFER },
4158 /* devices that don't properly handle TRIM commands */
4159 { "SuperSSpeed S238*", NULL, ATA_HORKAGE_NOTRIM, },
4162 * Some WD SATA-I drives spin up and down erratically when the link
4163 * is put into the slumber mode. We don't have full list of the
4164 * affected devices. Disable LPM if the device matches one of the
4165 * known prefixes and is SATA-1. As a side effect LPM partial is
4168 * https://bugzilla.kernel.org/show_bug.cgi?id=57211
4170 { "WDC WD800JD-*", NULL, ATA_HORKAGE_WD_BROKEN_LPM },
4171 { "WDC WD1200JD-*", NULL, ATA_HORKAGE_WD_BROKEN_LPM },
4172 { "WDC WD1600JD-*", NULL, ATA_HORKAGE_WD_BROKEN_LPM },
4173 { "WDC WD2000JD-*", NULL, ATA_HORKAGE_WD_BROKEN_LPM },
4174 { "WDC WD2500JD-*", NULL, ATA_HORKAGE_WD_BROKEN_LPM },
4175 { "WDC WD3000JD-*", NULL, ATA_HORKAGE_WD_BROKEN_LPM },
4176 { "WDC WD3200JD-*", NULL, ATA_HORKAGE_WD_BROKEN_LPM },
4183 * glob_match - match a text string against a glob-style pattern
4184 * @text: the string to be examined
4185 * @pattern: the glob-style pattern to be matched against
4187 * Either/both of text and pattern can be empty strings.
4189 * Match text against a glob-style pattern, with wildcards and simple sets:
4191 * ? matches any single character.
4192 * * matches any run of characters.
4193 * [xyz] matches a single character from the set: x, y, or z.
4194 * [a-d] matches a single character from the range: a, b, c, or d.
4195 * [a-d0-9] matches a single character from either range.
4197 * The special characters ?, [, -, or *, can be matched using a set, eg. [*]
4198 * Behaviour with malformed patterns is undefined, though generally reasonable.
4200 * Sample patterns: "SD1?", "SD1[0-5]", "*R0", "SD*1?[012]*xx"
4202 * This function uses one level of recursion per '*' in pattern.
4203 * Since it calls _nothing_ else, and has _no_ explicit local variables,
4204 * this will not cause stack problems for any reasonable use here.
4207 * 0 on match, 1 otherwise.
4209 static int glob_match (const char *text, const char *pattern)
4212 /* Match single character or a '?' wildcard */
4213 if (*text == *pattern || *pattern == '?') {
4215 return 0; /* End of both strings: match */
4217 /* Match single char against a '[' bracketed ']' pattern set */
4218 if (!*text || *pattern != '[')
4219 break; /* Not a pattern set */
4220 while (*++pattern && *pattern != ']' && *text != *pattern) {
4221 if (*pattern == '-' && *(pattern - 1) != '[')
4222 if (*text > *(pattern - 1) && *text < *(pattern + 1)) {
4227 if (!*pattern || *pattern == ']')
4228 return 1; /* No match */
4229 while (*pattern && *pattern++ != ']');
4231 } while (*++text && *pattern);
4233 /* Match any run of chars against a '*' wildcard */
4234 if (*pattern == '*') {
4236 return 0; /* Match: avoid recursion at end of pattern */
4237 /* Loop to handle additional pattern chars after the wildcard */
4239 if (glob_match(text, pattern) == 0)
4240 return 0; /* Remainder matched */
4241 ++text; /* Absorb (match) this char and try again */
4244 if (!*text && !*pattern)
4245 return 0; /* End of both strings: match */
4246 return 1; /* No match */
4249 static unsigned long ata_dev_blacklisted(const struct ata_device *dev)
4251 unsigned char model_num[ATA_ID_PROD_LEN + 1];
4252 unsigned char model_rev[ATA_ID_FW_REV_LEN + 1];
4253 const struct ata_blacklist_entry *ad = ata_device_blacklist;
4255 ata_id_c_string(dev->id, model_num, ATA_ID_PROD, sizeof(model_num));
4256 ata_id_c_string(dev->id, model_rev, ATA_ID_FW_REV, sizeof(model_rev));
4258 while (ad->model_num) {
4259 if (!glob_match(model_num, ad->model_num)) {
4260 if (ad->model_rev == NULL)
4262 if (!glob_match(model_rev, ad->model_rev))
4270 static int ata_dma_blacklisted(const struct ata_device *dev)
4272 /* We don't support polling DMA.
4273 * DMA blacklist those ATAPI devices with CDB-intr (and use PIO)
4274 * if the LLDD handles only interrupts in the HSM_ST_LAST state.
4276 if ((dev->link->ap->flags & ATA_FLAG_PIO_POLLING) &&
4277 (dev->flags & ATA_DFLAG_CDB_INTR))
4279 return (dev->horkage & ATA_HORKAGE_NODMA) ? 1 : 0;
4283 * ata_is_40wire - check drive side detection
4286 * Perform drive side detection decoding, allowing for device vendors
4287 * who can't follow the documentation.
4290 static int ata_is_40wire(struct ata_device *dev)
4292 if (dev->horkage & ATA_HORKAGE_IVB)
4293 return ata_drive_40wire_relaxed(dev->id);
4294 return ata_drive_40wire(dev->id);
4298 * cable_is_40wire - 40/80/SATA decider
4299 * @ap: port to consider
4301 * This function encapsulates the policy for speed management
4302 * in one place. At the moment we don't cache the result but
4303 * there is a good case for setting ap->cbl to the result when
4304 * we are called with unknown cables (and figuring out if it
4305 * impacts hotplug at all).
4307 * Return 1 if the cable appears to be 40 wire.
4310 static int cable_is_40wire(struct ata_port *ap)
4312 struct ata_link *link;
4313 struct ata_device *dev;
4315 /* If the controller thinks we are 40 wire, we are. */
4316 if (ap->cbl == ATA_CBL_PATA40)
4319 /* If the controller thinks we are 80 wire, we are. */
4320 if (ap->cbl == ATA_CBL_PATA80 || ap->cbl == ATA_CBL_SATA)
4323 /* If the system is known to be 40 wire short cable (eg
4324 * laptop), then we allow 80 wire modes even if the drive
4327 if (ap->cbl == ATA_CBL_PATA40_SHORT)
4330 /* If the controller doesn't know, we scan.
4332 * Note: We look for all 40 wire detects at this point. Any
4333 * 80 wire detect is taken to be 80 wire cable because
4334 * - in many setups only the one drive (slave if present) will
4335 * give a valid detect
4336 * - if you have a non detect capable drive you don't want it
4337 * to colour the choice
4339 ata_for_each_link(link, ap, EDGE) {
4340 ata_for_each_dev(dev, link, ENABLED) {
4341 if (!ata_is_40wire(dev))
4349 * ata_dev_xfermask - Compute supported xfermask of the given device
4350 * @dev: Device to compute xfermask for
4352 * Compute supported xfermask of @dev and store it in
4353 * dev->*_mask. This function is responsible for applying all
4354 * known limits including host controller limits, device
4360 static void ata_dev_xfermask(struct ata_device *dev)
4362 struct ata_link *link = dev->link;
4363 struct ata_port *ap = link->ap;
4364 struct ata_host *host = ap->host;
4365 unsigned long xfer_mask;
4367 /* controller modes available */
4368 xfer_mask = ata_pack_xfermask(ap->pio_mask,
4369 ap->mwdma_mask, ap->udma_mask);
4371 /* drive modes available */
4372 xfer_mask &= ata_pack_xfermask(dev->pio_mask,
4373 dev->mwdma_mask, dev->udma_mask);
4374 xfer_mask &= ata_id_xfermask(dev->id);
4377 * CFA Advanced TrueIDE timings are not allowed on a shared
4380 if (ata_dev_pair(dev)) {
4381 /* No PIO5 or PIO6 */
4382 xfer_mask &= ~(0x03 << (ATA_SHIFT_PIO + 5));
4383 /* No MWDMA3 or MWDMA 4 */
4384 xfer_mask &= ~(0x03 << (ATA_SHIFT_MWDMA + 3));
4387 if (ata_dma_blacklisted(dev)) {
4388 xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA);
4390 "device is on DMA blacklist, disabling DMA\n");
4393 if ((host->flags & ATA_HOST_SIMPLEX) &&
4394 host->simplex_claimed && host->simplex_claimed != ap) {
4395 xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA);
4397 "simplex DMA is claimed by other device, disabling DMA\n");
4400 if (ap->flags & ATA_FLAG_NO_IORDY)
4401 xfer_mask &= ata_pio_mask_no_iordy(dev);
4403 if (ap->ops->mode_filter)
4404 xfer_mask = ap->ops->mode_filter(dev, xfer_mask);
4406 /* Apply cable rule here. Don't apply it early because when
4407 * we handle hot plug the cable type can itself change.
4408 * Check this last so that we know if the transfer rate was
4409 * solely limited by the cable.
4410 * Unknown or 80 wire cables reported host side are checked
4411 * drive side as well. Cases where we know a 40wire cable
4412 * is used safely for 80 are not checked here.
4414 if (xfer_mask & (0xF8 << ATA_SHIFT_UDMA))
4415 /* UDMA/44 or higher would be available */
4416 if (cable_is_40wire(ap)) {
4418 "limited to UDMA/33 due to 40-wire cable\n");
4419 xfer_mask &= ~(0xF8 << ATA_SHIFT_UDMA);
4422 ata_unpack_xfermask(xfer_mask, &dev->pio_mask,
4423 &dev->mwdma_mask, &dev->udma_mask);
4427 * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command
4428 * @dev: Device to which command will be sent
4430 * Issue SET FEATURES - XFER MODE command to device @dev
4434 * PCI/etc. bus probe sem.
4437 * 0 on success, AC_ERR_* mask otherwise.
4440 static unsigned int ata_dev_set_xfermode(struct ata_device *dev)
4442 struct ata_taskfile tf;
4443 unsigned int err_mask;
4445 /* set up set-features taskfile */
4446 DPRINTK("set features - xfer mode\n");
4448 /* Some controllers and ATAPI devices show flaky interrupt
4449 * behavior after setting xfer mode. Use polling instead.
4451 ata_tf_init(dev, &tf);
4452 tf.command = ATA_CMD_SET_FEATURES;
4453 tf.feature = SETFEATURES_XFER;
4454 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_POLLING;
4455 tf.protocol = ATA_PROT_NODATA;
4456 /* If we are using IORDY we must send the mode setting command */
4457 if (ata_pio_need_iordy(dev))
4458 tf.nsect = dev->xfer_mode;
4459 /* If the device has IORDY and the controller does not - turn it off */
4460 else if (ata_id_has_iordy(dev->id))
4462 else /* In the ancient relic department - skip all of this */
4465 /* On some disks, this command causes spin-up, so we need longer timeout */
4466 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 15000);
4468 DPRINTK("EXIT, err_mask=%x\n", err_mask);
4473 * ata_dev_set_feature - Issue SET FEATURES - SATA FEATURES
4474 * @dev: Device to which command will be sent
4475 * @enable: Whether to enable or disable the feature
4476 * @feature: The sector count represents the feature to set
4478 * Issue SET FEATURES - SATA FEATURES command to device @dev
4479 * on port @ap with sector count
4482 * PCI/etc. bus probe sem.
4485 * 0 on success, AC_ERR_* mask otherwise.
4487 unsigned int ata_dev_set_feature(struct ata_device *dev, u8 enable, u8 feature)
4489 struct ata_taskfile tf;
4490 unsigned int err_mask;
4492 /* set up set-features taskfile */
4493 DPRINTK("set features - SATA features\n");
4495 ata_tf_init(dev, &tf);
4496 tf.command = ATA_CMD_SET_FEATURES;
4497 tf.feature = enable;
4498 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
4499 tf.protocol = ATA_PROT_NODATA;
4502 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
4504 DPRINTK("EXIT, err_mask=%x\n", err_mask);
4509 * ata_dev_init_params - Issue INIT DEV PARAMS command
4510 * @dev: Device to which command will be sent
4511 * @heads: Number of heads (taskfile parameter)
4512 * @sectors: Number of sectors (taskfile parameter)
4515 * Kernel thread context (may sleep)
4518 * 0 on success, AC_ERR_* mask otherwise.
4520 static unsigned int ata_dev_init_params(struct ata_device *dev,
4521 u16 heads, u16 sectors)
4523 struct ata_taskfile tf;
4524 unsigned int err_mask;
4526 /* Number of sectors per track 1-255. Number of heads 1-16 */
4527 if (sectors < 1 || sectors > 255 || heads < 1 || heads > 16)
4528 return AC_ERR_INVALID;
4530 /* set up init dev params taskfile */
4531 DPRINTK("init dev params \n");
4533 ata_tf_init(dev, &tf);
4534 tf.command = ATA_CMD_INIT_DEV_PARAMS;
4535 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
4536 tf.protocol = ATA_PROT_NODATA;
4538 tf.device |= (heads - 1) & 0x0f; /* max head = num. of heads - 1 */
4540 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
4541 /* A clean abort indicates an original or just out of spec drive
4542 and we should continue as we issue the setup based on the
4543 drive reported working geometry */
4544 if (err_mask == AC_ERR_DEV && (tf.feature & ATA_ABORTED))
4547 DPRINTK("EXIT, err_mask=%x\n", err_mask);
4552 * ata_sg_clean - Unmap DMA memory associated with command
4553 * @qc: Command containing DMA memory to be released
4555 * Unmap all mapped DMA memory associated with this command.
4558 * spin_lock_irqsave(host lock)
4560 void ata_sg_clean(struct ata_queued_cmd *qc)
4562 struct ata_port *ap = qc->ap;
4563 struct scatterlist *sg = qc->sg;
4564 int dir = qc->dma_dir;
4566 WARN_ON_ONCE(sg == NULL);
4568 VPRINTK("unmapping %u sg elements\n", qc->n_elem);
4571 dma_unmap_sg(ap->dev, sg, qc->orig_n_elem, dir);
4573 qc->flags &= ~ATA_QCFLAG_DMAMAP;
4578 * atapi_check_dma - Check whether ATAPI DMA can be supported
4579 * @qc: Metadata associated with taskfile to check
4581 * Allow low-level driver to filter ATA PACKET commands, returning
4582 * a status indicating whether or not it is OK to use DMA for the
4583 * supplied PACKET command.
4586 * spin_lock_irqsave(host lock)
4588 * RETURNS: 0 when ATAPI DMA can be used
4591 int atapi_check_dma(struct ata_queued_cmd *qc)
4593 struct ata_port *ap = qc->ap;
4595 /* Don't allow DMA if it isn't multiple of 16 bytes. Quite a
4596 * few ATAPI devices choke on such DMA requests.
4598 if (!(qc->dev->horkage & ATA_HORKAGE_ATAPI_MOD16_DMA) &&
4599 unlikely(qc->nbytes & 15))
4602 if (ap->ops->check_atapi_dma)
4603 return ap->ops->check_atapi_dma(qc);
4609 * ata_std_qc_defer - Check whether a qc needs to be deferred
4610 * @qc: ATA command in question
4612 * Non-NCQ commands cannot run with any other command, NCQ or
4613 * not. As upper layer only knows the queue depth, we are
4614 * responsible for maintaining exclusion. This function checks
4615 * whether a new command @qc can be issued.
4618 * spin_lock_irqsave(host lock)
4621 * ATA_DEFER_* if deferring is needed, 0 otherwise.
4623 int ata_std_qc_defer(struct ata_queued_cmd *qc)
4625 struct ata_link *link = qc->dev->link;
4627 if (qc->tf.protocol == ATA_PROT_NCQ) {
4628 if (!ata_tag_valid(link->active_tag))
4631 if (!ata_tag_valid(link->active_tag) && !link->sactive)
4635 return ATA_DEFER_LINK;
4638 void ata_noop_qc_prep(struct ata_queued_cmd *qc) { }
4641 * ata_sg_init - Associate command with scatter-gather table.
4642 * @qc: Command to be associated
4643 * @sg: Scatter-gather table.
4644 * @n_elem: Number of elements in s/g table.
4646 * Initialize the data-related elements of queued_cmd @qc
4647 * to point to a scatter-gather table @sg, containing @n_elem
4651 * spin_lock_irqsave(host lock)
4653 void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
4654 unsigned int n_elem)
4657 qc->n_elem = n_elem;
4662 * ata_sg_setup - DMA-map the scatter-gather table associated with a command.
4663 * @qc: Command with scatter-gather table to be mapped.
4665 * DMA-map the scatter-gather table associated with queued_cmd @qc.
4668 * spin_lock_irqsave(host lock)
4671 * Zero on success, negative on error.
4674 static int ata_sg_setup(struct ata_queued_cmd *qc)
4676 struct ata_port *ap = qc->ap;
4677 unsigned int n_elem;
4679 VPRINTK("ENTER, ata%u\n", ap->print_id);
4681 n_elem = dma_map_sg(ap->dev, qc->sg, qc->n_elem, qc->dma_dir);
4685 DPRINTK("%d sg elements mapped\n", n_elem);
4686 qc->orig_n_elem = qc->n_elem;
4687 qc->n_elem = n_elem;
4688 qc->flags |= ATA_QCFLAG_DMAMAP;
4694 * swap_buf_le16 - swap halves of 16-bit words in place
4695 * @buf: Buffer to swap
4696 * @buf_words: Number of 16-bit words in buffer.
4698 * Swap halves of 16-bit words if needed to convert from
4699 * little-endian byte order to native cpu byte order, or
4703 * Inherited from caller.
4705 void swap_buf_le16(u16 *buf, unsigned int buf_words)
4710 for (i = 0; i < buf_words; i++)
4711 buf[i] = le16_to_cpu(buf[i]);
4712 #endif /* __BIG_ENDIAN */
4716 * ata_qc_new - Request an available ATA command, for queueing
4719 * Some ATA host controllers may implement a queue depth which is less
4720 * than ATA_MAX_QUEUE. So we shouldn't allocate a tag which is beyond
4721 * the hardware limitation.
4727 static struct ata_queued_cmd *ata_qc_new(struct ata_port *ap)
4729 struct ata_queued_cmd *qc = NULL;
4730 unsigned int max_queue = ap->host->n_tags;
4731 unsigned int i, tag;
4733 /* no command while frozen */
4734 if (unlikely(ap->pflags & ATA_PFLAG_FROZEN))
4737 for (i = 0, tag = ap->last_tag + 1; i < max_queue; i++, tag++) {
4738 if (ap->flags & ATA_FLAG_LOWTAG)
4741 tag = tag < max_queue ? tag : 0;
4743 /* the last tag is reserved for internal command. */
4744 if (tag == ATA_TAG_INTERNAL)
4747 if (!test_and_set_bit(tag, &ap->qc_allocated)) {
4748 qc = __ata_qc_from_tag(ap, tag);
4759 * ata_qc_new_init - Request an available ATA command, and initialize it
4760 * @dev: Device from whom we request an available command structure
4766 struct ata_queued_cmd *ata_qc_new_init(struct ata_device *dev)
4768 struct ata_port *ap = dev->link->ap;
4769 struct ata_queued_cmd *qc;
4771 qc = ata_qc_new(ap);
4784 * ata_qc_free - free unused ata_queued_cmd
4785 * @qc: Command to complete
4787 * Designed to free unused ata_queued_cmd object
4788 * in case something prevents using it.
4791 * spin_lock_irqsave(host lock)
4793 void ata_qc_free(struct ata_queued_cmd *qc)
4795 struct ata_port *ap;
4798 WARN_ON_ONCE(qc == NULL); /* ata_qc_from_tag _might_ return NULL */
4803 if (likely(ata_tag_valid(tag))) {
4804 qc->tag = ATA_TAG_POISON;
4805 clear_bit(tag, &ap->qc_allocated);
4809 void __ata_qc_complete(struct ata_queued_cmd *qc)
4811 struct ata_port *ap;
4812 struct ata_link *link;
4814 WARN_ON_ONCE(qc == NULL); /* ata_qc_from_tag _might_ return NULL */
4815 WARN_ON_ONCE(!(qc->flags & ATA_QCFLAG_ACTIVE));
4817 link = qc->dev->link;
4819 if (likely(qc->flags & ATA_QCFLAG_DMAMAP))
4822 /* command should be marked inactive atomically with qc completion */
4823 if (qc->tf.protocol == ATA_PROT_NCQ) {
4824 link->sactive &= ~(1 << qc->tag);
4826 ap->nr_active_links--;
4828 link->active_tag = ATA_TAG_POISON;
4829 ap->nr_active_links--;
4832 /* clear exclusive status */
4833 if (unlikely(qc->flags & ATA_QCFLAG_CLEAR_EXCL &&
4834 ap->excl_link == link))
4835 ap->excl_link = NULL;
4837 /* atapi: mark qc as inactive to prevent the interrupt handler
4838 * from completing the command twice later, before the error handler
4839 * is called. (when rc != 0 and atapi request sense is needed)
4841 qc->flags &= ~ATA_QCFLAG_ACTIVE;
4842 ap->qc_active &= ~(1 << qc->tag);
4844 /* call completion callback */
4845 qc->complete_fn(qc);
4848 static void fill_result_tf(struct ata_queued_cmd *qc)
4850 struct ata_port *ap = qc->ap;
4852 qc->result_tf.flags = qc->tf.flags;
4853 ap->ops->qc_fill_rtf(qc);
4856 static void ata_verify_xfer(struct ata_queued_cmd *qc)
4858 struct ata_device *dev = qc->dev;
4860 if (ata_is_nodata(qc->tf.protocol))
4863 if ((dev->mwdma_mask || dev->udma_mask) && ata_is_pio(qc->tf.protocol))
4866 dev->flags &= ~ATA_DFLAG_DUBIOUS_XFER;
4870 * ata_qc_complete - Complete an active ATA command
4871 * @qc: Command to complete
4873 * Indicate to the mid and upper layers that an ATA command has
4874 * completed, with either an ok or not-ok status.
4876 * Refrain from calling this function multiple times when
4877 * successfully completing multiple NCQ commands.
4878 * ata_qc_complete_multiple() should be used instead, which will
4879 * properly update IRQ expect state.
4882 * spin_lock_irqsave(host lock)
4884 void ata_qc_complete(struct ata_queued_cmd *qc)
4886 struct ata_port *ap = qc->ap;
4888 /* XXX: New EH and old EH use different mechanisms to
4889 * synchronize EH with regular execution path.
4891 * In new EH, a failed qc is marked with ATA_QCFLAG_FAILED.
4892 * Normal execution path is responsible for not accessing a
4893 * failed qc. libata core enforces the rule by returning NULL
4894 * from ata_qc_from_tag() for failed qcs.
4896 * Old EH depends on ata_qc_complete() nullifying completion
4897 * requests if ATA_QCFLAG_EH_SCHEDULED is set. Old EH does
4898 * not synchronize with interrupt handler. Only PIO task is
4901 if (ap->ops->error_handler) {
4902 struct ata_device *dev = qc->dev;
4903 struct ata_eh_info *ehi = &dev->link->eh_info;
4905 if (unlikely(qc->err_mask))
4906 qc->flags |= ATA_QCFLAG_FAILED;
4909 * Finish internal commands without any further processing
4910 * and always with the result TF filled.
4912 if (unlikely(ata_tag_internal(qc->tag))) {
4914 __ata_qc_complete(qc);
4919 * Non-internal qc has failed. Fill the result TF and
4922 if (unlikely(qc->flags & ATA_QCFLAG_FAILED)) {
4924 ata_qc_schedule_eh(qc);
4928 WARN_ON_ONCE(ap->pflags & ATA_PFLAG_FROZEN);
4930 /* read result TF if requested */
4931 if (qc->flags & ATA_QCFLAG_RESULT_TF)
4934 /* Some commands need post-processing after successful
4937 switch (qc->tf.command) {
4938 case ATA_CMD_SET_FEATURES:
4939 if (qc->tf.feature != SETFEATURES_WC_ON &&
4940 qc->tf.feature != SETFEATURES_WC_OFF)
4943 case ATA_CMD_INIT_DEV_PARAMS: /* CHS translation changed */
4944 case ATA_CMD_SET_MULTI: /* multi_count changed */
4945 /* revalidate device */
4946 ehi->dev_action[dev->devno] |= ATA_EH_REVALIDATE;
4947 ata_port_schedule_eh(ap);
4951 dev->flags |= ATA_DFLAG_SLEEPING;
4955 if (unlikely(dev->flags & ATA_DFLAG_DUBIOUS_XFER))
4956 ata_verify_xfer(qc);
4958 __ata_qc_complete(qc);
4960 if (qc->flags & ATA_QCFLAG_EH_SCHEDULED)
4963 /* read result TF if failed or requested */
4964 if (qc->err_mask || qc->flags & ATA_QCFLAG_RESULT_TF)
4967 __ata_qc_complete(qc);
4972 * ata_qc_complete_multiple - Complete multiple qcs successfully
4973 * @ap: port in question
4974 * @qc_active: new qc_active mask
4976 * Complete in-flight commands. This functions is meant to be
4977 * called from low-level driver's interrupt routine to complete
4978 * requests normally. ap->qc_active and @qc_active is compared
4979 * and commands are completed accordingly.
4981 * Always use this function when completing multiple NCQ commands
4982 * from IRQ handlers instead of calling ata_qc_complete()
4983 * multiple times to keep IRQ expect status properly in sync.
4986 * spin_lock_irqsave(host lock)
4989 * Number of completed commands on success, -errno otherwise.
4991 int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active)
4996 done_mask = ap->qc_active ^ qc_active;
4998 if (unlikely(done_mask & qc_active)) {
4999 ata_port_err(ap, "illegal qc_active transition (%08x->%08x)\n",
5000 ap->qc_active, qc_active);
5005 struct ata_queued_cmd *qc;
5006 unsigned int tag = __ffs(done_mask);
5008 qc = ata_qc_from_tag(ap, tag);
5010 ata_qc_complete(qc);
5013 done_mask &= ~(1 << tag);
5020 * ata_qc_issue - issue taskfile to device
5021 * @qc: command to issue to device
5023 * Prepare an ATA command to submission to device.
5024 * This includes mapping the data into a DMA-able
5025 * area, filling in the S/G table, and finally
5026 * writing the taskfile to hardware, starting the command.
5029 * spin_lock_irqsave(host lock)
5031 void ata_qc_issue(struct ata_queued_cmd *qc)
5033 struct ata_port *ap = qc->ap;
5034 struct ata_link *link = qc->dev->link;
5035 u8 prot = qc->tf.protocol;
5037 /* Make sure only one non-NCQ command is outstanding. The
5038 * check is skipped for old EH because it reuses active qc to
5039 * request ATAPI sense.
5041 WARN_ON_ONCE(ap->ops->error_handler && ata_tag_valid(link->active_tag));
5043 if (ata_is_ncq(prot)) {
5044 WARN_ON_ONCE(link->sactive & (1 << qc->tag));
5047 ap->nr_active_links++;
5048 link->sactive |= 1 << qc->tag;
5050 WARN_ON_ONCE(link->sactive);
5052 ap->nr_active_links++;
5053 link->active_tag = qc->tag;
5056 qc->flags |= ATA_QCFLAG_ACTIVE;
5057 ap->qc_active |= 1 << qc->tag;
5060 * We guarantee to LLDs that they will have at least one
5061 * non-zero sg if the command is a data command.
5063 if (ata_is_data(prot) && (!qc->sg || !qc->n_elem || !qc->nbytes))
5066 if (ata_is_dma(prot) || (ata_is_pio(prot) &&
5067 (ap->flags & ATA_FLAG_PIO_DMA)))
5068 if (ata_sg_setup(qc))
5071 /* if device is sleeping, schedule reset and abort the link */
5072 if (unlikely(qc->dev->flags & ATA_DFLAG_SLEEPING)) {
5073 link->eh_info.action |= ATA_EH_RESET;
5074 ata_ehi_push_desc(&link->eh_info, "waking up from sleep");
5075 ata_link_abort(link);
5079 ap->ops->qc_prep(qc);
5081 qc->err_mask |= ap->ops->qc_issue(qc);
5082 if (unlikely(qc->err_mask))
5087 qc->err_mask |= AC_ERR_SYSTEM;
5089 ata_qc_complete(qc);
5093 * sata_scr_valid - test whether SCRs are accessible
5094 * @link: ATA link to test SCR accessibility for
5096 * Test whether SCRs are accessible for @link.
5102 * 1 if SCRs are accessible, 0 otherwise.
5104 int sata_scr_valid(struct ata_link *link)
5106 struct ata_port *ap = link->ap;
5108 return (ap->flags & ATA_FLAG_SATA) && ap->ops->scr_read;
5112 * sata_scr_read - read SCR register of the specified port
5113 * @link: ATA link to read SCR for
5115 * @val: Place to store read value
5117 * Read SCR register @reg of @link into *@val. This function is
5118 * guaranteed to succeed if @link is ap->link, the cable type of
5119 * the port is SATA and the port implements ->scr_read.
5122 * None if @link is ap->link. Kernel thread context otherwise.
5125 * 0 on success, negative errno on failure.
5127 int sata_scr_read(struct ata_link *link, int reg, u32 *val)
5129 if (ata_is_host_link(link)) {
5130 if (sata_scr_valid(link))
5131 return link->ap->ops->scr_read(link, reg, val);
5135 return sata_pmp_scr_read(link, reg, val);
5139 * sata_scr_write - write SCR register of the specified port
5140 * @link: ATA link to write SCR for
5141 * @reg: SCR to write
5142 * @val: value to write
5144 * Write @val to SCR register @reg of @link. This function is
5145 * guaranteed to succeed if @link is ap->link, the cable type of
5146 * the port is SATA and the port implements ->scr_read.
5149 * None if @link is ap->link. Kernel thread context otherwise.
5152 * 0 on success, negative errno on failure.
5154 int sata_scr_write(struct ata_link *link, int reg, u32 val)
5156 if (ata_is_host_link(link)) {
5157 if (sata_scr_valid(link))
5158 return link->ap->ops->scr_write(link, reg, val);
5162 return sata_pmp_scr_write(link, reg, val);
5166 * sata_scr_write_flush - write SCR register of the specified port and flush
5167 * @link: ATA link to write SCR for
5168 * @reg: SCR to write
5169 * @val: value to write
5171 * This function is identical to sata_scr_write() except that this
5172 * function performs flush after writing to the register.
5175 * None if @link is ap->link. Kernel thread context otherwise.
5178 * 0 on success, negative errno on failure.
5180 int sata_scr_write_flush(struct ata_link *link, int reg, u32 val)
5182 if (ata_is_host_link(link)) {
5185 if (sata_scr_valid(link)) {
5186 rc = link->ap->ops->scr_write(link, reg, val);
5188 rc = link->ap->ops->scr_read(link, reg, &val);
5194 return sata_pmp_scr_write(link, reg, val);
5198 * ata_phys_link_online - test whether the given link is online
5199 * @link: ATA link to test
5201 * Test whether @link is online. Note that this function returns
5202 * 0 if online status of @link cannot be obtained, so
5203 * ata_link_online(link) != !ata_link_offline(link).
5209 * True if the port online status is available and online.
5211 bool ata_phys_link_online(struct ata_link *link)
5215 if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0 &&
5216 ata_sstatus_online(sstatus))
5222 * ata_phys_link_offline - test whether the given link is offline
5223 * @link: ATA link to test
5225 * Test whether @link is offline. Note that this function
5226 * returns 0 if offline status of @link cannot be obtained, so
5227 * ata_link_online(link) != !ata_link_offline(link).
5233 * True if the port offline status is available and offline.
5235 bool ata_phys_link_offline(struct ata_link *link)
5239 if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0 &&
5240 !ata_sstatus_online(sstatus))
5246 * ata_link_online - test whether the given link is online
5247 * @link: ATA link to test
5249 * Test whether @link is online. This is identical to
5250 * ata_phys_link_online() when there's no slave link. When
5251 * there's a slave link, this function should only be called on
5252 * the master link and will return true if any of M/S links is
5259 * True if the port online status is available and online.
5261 bool ata_link_online(struct ata_link *link)
5263 struct ata_link *slave = link->ap->slave_link;
5265 WARN_ON(link == slave); /* shouldn't be called on slave link */
5267 return ata_phys_link_online(link) ||
5268 (slave && ata_phys_link_online(slave));
5272 * ata_link_offline - test whether the given link is offline
5273 * @link: ATA link to test
5275 * Test whether @link is offline. This is identical to
5276 * ata_phys_link_offline() when there's no slave link. When
5277 * there's a slave link, this function should only be called on
5278 * the master link and will return true if both M/S links are
5285 * True if the port offline status is available and offline.
5287 bool ata_link_offline(struct ata_link *link)
5289 struct ata_link *slave = link->ap->slave_link;
5291 WARN_ON(link == slave); /* shouldn't be called on slave link */
5293 return ata_phys_link_offline(link) &&
5294 (!slave || ata_phys_link_offline(slave));
5298 static int ata_host_request_pm(struct ata_host *host, pm_message_t mesg,
5299 unsigned int action, unsigned int ehi_flags,
5302 unsigned long flags;
5305 for (i = 0; i < host->n_ports; i++) {
5306 struct ata_port *ap = host->ports[i];
5307 struct ata_link *link;
5309 /* Previous resume operation might still be in
5310 * progress. Wait for PM_PENDING to clear.
5312 if (ap->pflags & ATA_PFLAG_PM_PENDING) {
5313 ata_port_wait_eh(ap);
5314 WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING);
5317 /* request PM ops to EH */
5318 spin_lock_irqsave(ap->lock, flags);
5323 ap->pm_result = &rc;
5326 ap->pflags |= ATA_PFLAG_PM_PENDING;
5327 ata_for_each_link(link, ap, HOST_FIRST) {
5328 link->eh_info.action |= action;
5329 link->eh_info.flags |= ehi_flags;
5332 ata_port_schedule_eh(ap);
5334 spin_unlock_irqrestore(ap->lock, flags);
5336 /* wait and check result */
5338 ata_port_wait_eh(ap);
5339 WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING);
5349 * ata_host_suspend - suspend host
5350 * @host: host to suspend
5353 * Suspend @host. Actual operation is performed by EH. This
5354 * function requests EH to perform PM operations and waits for EH
5358 * Kernel thread context (may sleep).
5361 * 0 on success, -errno on failure.
5363 int ata_host_suspend(struct ata_host *host, pm_message_t mesg)
5365 unsigned int ehi_flags = ATA_EHI_QUIET;
5369 * On some hardware, device fails to respond after spun down
5370 * for suspend. As the device won't be used before being
5371 * resumed, we don't need to touch the device. Ask EH to skip
5372 * the usual stuff and proceed directly to suspend.
5374 * http://thread.gmane.org/gmane.linux.ide/46764
5376 if (mesg.event == PM_EVENT_SUSPEND)
5377 ehi_flags |= ATA_EHI_NO_AUTOPSY | ATA_EHI_NO_RECOVERY;
5379 rc = ata_host_request_pm(host, mesg, 0, ehi_flags, 1);
5381 host->dev->power.power_state = mesg;
5386 * ata_host_resume - resume host
5387 * @host: host to resume
5389 * Resume @host. Actual operation is performed by EH. This
5390 * function requests EH to perform PM operations and returns.
5391 * Note that all resume operations are performed parallelly.
5394 * Kernel thread context (may sleep).
5396 void ata_host_resume(struct ata_host *host)
5398 ata_host_request_pm(host, PMSG_ON, ATA_EH_RESET,
5399 ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET, 0);
5400 host->dev->power.power_state = PMSG_ON;
5405 * ata_dev_init - Initialize an ata_device structure
5406 * @dev: Device structure to initialize
5408 * Initialize @dev in preparation for probing.
5411 * Inherited from caller.
5413 void ata_dev_init(struct ata_device *dev)
5415 struct ata_link *link = ata_dev_phys_link(dev);
5416 struct ata_port *ap = link->ap;
5417 unsigned long flags;
5419 /* SATA spd limit is bound to the attached device, reset together */
5420 link->sata_spd_limit = link->hw_sata_spd_limit;
5423 /* High bits of dev->flags are used to record warm plug
5424 * requests which occur asynchronously. Synchronize using
5427 spin_lock_irqsave(ap->lock, flags);
5428 dev->flags &= ~ATA_DFLAG_INIT_MASK;
5430 spin_unlock_irqrestore(ap->lock, flags);
5432 memset((void *)dev + ATA_DEVICE_CLEAR_BEGIN, 0,
5433 ATA_DEVICE_CLEAR_END - ATA_DEVICE_CLEAR_BEGIN);
5434 dev->pio_mask = UINT_MAX;
5435 dev->mwdma_mask = UINT_MAX;
5436 dev->udma_mask = UINT_MAX;
5440 * ata_link_init - Initialize an ata_link structure
5441 * @ap: ATA port link is attached to
5442 * @link: Link structure to initialize
5443 * @pmp: Port multiplier port number
5448 * Kernel thread context (may sleep)
5450 void ata_link_init(struct ata_port *ap, struct ata_link *link, int pmp)
5454 /* clear everything except for devices */
5455 memset((void *)link + ATA_LINK_CLEAR_BEGIN, 0,
5456 ATA_LINK_CLEAR_END - ATA_LINK_CLEAR_BEGIN);
5460 link->active_tag = ATA_TAG_POISON;
5461 link->hw_sata_spd_limit = UINT_MAX;
5463 /* can't use iterator, ap isn't initialized yet */
5464 for (i = 0; i < ATA_MAX_DEVICES; i++) {
5465 struct ata_device *dev = &link->device[i];
5468 dev->devno = dev - link->device;
5469 #ifdef CONFIG_ATA_ACPI
5470 dev->gtf_filter = ata_acpi_gtf_filter;
5477 * sata_link_init_spd - Initialize link->sata_spd_limit
5478 * @link: Link to configure sata_spd_limit for
5480 * Initialize @link->[hw_]sata_spd_limit to the currently
5484 * Kernel thread context (may sleep).
5487 * 0 on success, -errno on failure.
5489 int sata_link_init_spd(struct ata_link *link)
5494 rc = sata_scr_read(link, SCR_CONTROL, &link->saved_scontrol);
5498 spd = (link->saved_scontrol >> 4) & 0xf;
5500 link->hw_sata_spd_limit &= (1 << spd) - 1;
5502 ata_force_link_limits(link);
5504 link->sata_spd_limit = link->hw_sata_spd_limit;
5510 * ata_port_alloc - allocate and initialize basic ATA port resources
5511 * @host: ATA host this allocated port belongs to
5513 * Allocate and initialize basic ATA port resources.
5516 * Allocate ATA port on success, NULL on failure.
5519 * Inherited from calling layer (may sleep).
5521 struct ata_port *ata_port_alloc(struct ata_host *host)
5523 struct ata_port *ap;
5527 ap = kzalloc(sizeof(*ap), GFP_KERNEL);
5531 ap->pflags |= ATA_PFLAG_INITIALIZING | ATA_PFLAG_FROZEN;
5532 ap->lock = &host->lock;
5535 ap->dev = host->dev;
5537 #if defined(ATA_VERBOSE_DEBUG)
5538 /* turn on all debugging levels */
5539 ap->msg_enable = 0x00FF;
5540 #elif defined(ATA_DEBUG)
5541 ap->msg_enable = ATA_MSG_DRV | ATA_MSG_INFO | ATA_MSG_CTL | ATA_MSG_WARN | ATA_MSG_ERR;
5543 ap->msg_enable = ATA_MSG_DRV | ATA_MSG_ERR | ATA_MSG_WARN;
5546 mutex_init(&ap->scsi_scan_mutex);
5547 INIT_DELAYED_WORK(&ap->hotplug_task, ata_scsi_hotplug);
5548 INIT_WORK(&ap->scsi_rescan_task, ata_scsi_dev_rescan);
5549 INIT_LIST_HEAD(&ap->eh_done_q);
5550 init_waitqueue_head(&ap->eh_wait_q);
5551 init_completion(&ap->park_req_pending);
5552 init_timer_deferrable(&ap->fastdrain_timer);
5553 ap->fastdrain_timer.function = ata_eh_fastdrain_timerfn;
5554 ap->fastdrain_timer.data = (unsigned long)ap;
5556 ap->cbl = ATA_CBL_NONE;
5558 ata_link_init(ap, &ap->link, 0);
5561 ap->stats.unhandled_irq = 1;
5562 ap->stats.idle_irq = 1;
5564 ata_sff_port_init(ap);
5569 static void ata_host_release(struct device *gendev, void *res)
5571 struct ata_host *host = dev_get_drvdata(gendev);
5574 for (i = 0; i < host->n_ports; i++) {
5575 struct ata_port *ap = host->ports[i];
5581 scsi_host_put(ap->scsi_host);
5583 kfree(ap->pmp_link);
5584 kfree(ap->slave_link);
5586 host->ports[i] = NULL;
5589 dev_set_drvdata(gendev, NULL);
5593 * ata_host_alloc - allocate and init basic ATA host resources
5594 * @dev: generic device this host is associated with
5595 * @max_ports: maximum number of ATA ports associated with this host
5597 * Allocate and initialize basic ATA host resources. LLD calls
5598 * this function to allocate a host, initializes it fully and
5599 * attaches it using ata_host_register().
5601 * @max_ports ports are allocated and host->n_ports is
5602 * initialized to @max_ports. The caller is allowed to decrease
5603 * host->n_ports before calling ata_host_register(). The unused
5604 * ports will be automatically freed on registration.
5607 * Allocate ATA host on success, NULL on failure.
5610 * Inherited from calling layer (may sleep).
5612 struct ata_host *ata_host_alloc(struct device *dev, int max_ports)
5614 struct ata_host *host;
5620 if (!devres_open_group(dev, NULL, GFP_KERNEL))
5623 /* alloc a container for our list of ATA ports (buses) */
5624 sz = sizeof(struct ata_host) + (max_ports + 1) * sizeof(void *);
5625 /* alloc a container for our list of ATA ports (buses) */
5626 host = devres_alloc(ata_host_release, sz, GFP_KERNEL);
5630 devres_add(dev, host);
5631 dev_set_drvdata(dev, host);
5633 spin_lock_init(&host->lock);
5634 mutex_init(&host->eh_mutex);
5636 host->n_ports = max_ports;
5638 /* allocate ports bound to this host */
5639 for (i = 0; i < max_ports; i++) {
5640 struct ata_port *ap;
5642 ap = ata_port_alloc(host);
5647 host->ports[i] = ap;
5650 devres_remove_group(dev, NULL);
5654 devres_release_group(dev, NULL);
5659 * ata_host_alloc_pinfo - alloc host and init with port_info array
5660 * @dev: generic device this host is associated with
5661 * @ppi: array of ATA port_info to initialize host with
5662 * @n_ports: number of ATA ports attached to this host
5664 * Allocate ATA host and initialize with info from @ppi. If NULL
5665 * terminated, @ppi may contain fewer entries than @n_ports. The
5666 * last entry will be used for the remaining ports.
5669 * Allocate ATA host on success, NULL on failure.
5672 * Inherited from calling layer (may sleep).
5674 struct ata_host *ata_host_alloc_pinfo(struct device *dev,
5675 const struct ata_port_info * const * ppi,
5678 const struct ata_port_info *pi;
5679 struct ata_host *host;
5682 host = ata_host_alloc(dev, n_ports);
5686 for (i = 0, j = 0, pi = NULL; i < host->n_ports; i++) {
5687 struct ata_port *ap = host->ports[i];
5692 ap->pio_mask = pi->pio_mask;
5693 ap->mwdma_mask = pi->mwdma_mask;
5694 ap->udma_mask = pi->udma_mask;
5695 ap->flags |= pi->flags;
5696 ap->link.flags |= pi->link_flags;
5697 ap->ops = pi->port_ops;
5699 if (!host->ops && (pi->port_ops != &ata_dummy_port_ops))
5700 host->ops = pi->port_ops;
5707 * ata_slave_link_init - initialize slave link
5708 * @ap: port to initialize slave link for
5710 * Create and initialize slave link for @ap. This enables slave
5711 * link handling on the port.
5713 * In libata, a port contains links and a link contains devices.
5714 * There is single host link but if a PMP is attached to it,
5715 * there can be multiple fan-out links. On SATA, there's usually
5716 * a single device connected to a link but PATA and SATA
5717 * controllers emulating TF based interface can have two - master
5720 * However, there are a few controllers which don't fit into this
5721 * abstraction too well - SATA controllers which emulate TF
5722 * interface with both master and slave devices but also have
5723 * separate SCR register sets for each device. These controllers
5724 * need separate links for physical link handling
5725 * (e.g. onlineness, link speed) but should be treated like a
5726 * traditional M/S controller for everything else (e.g. command
5727 * issue, softreset).
5729 * slave_link is libata's way of handling this class of
5730 * controllers without impacting core layer too much. For
5731 * anything other than physical link handling, the default host
5732 * link is used for both master and slave. For physical link
5733 * handling, separate @ap->slave_link is used. All dirty details
5734 * are implemented inside libata core layer. From LLD's POV, the
5735 * only difference is that prereset, hardreset and postreset are
5736 * called once more for the slave link, so the reset sequence
5737 * looks like the following.
5739 * prereset(M) -> prereset(S) -> hardreset(M) -> hardreset(S) ->
5740 * softreset(M) -> postreset(M) -> postreset(S)
5742 * Note that softreset is called only for the master. Softreset
5743 * resets both M/S by definition, so SRST on master should handle
5744 * both (the standard method will work just fine).
5747 * Should be called before host is registered.
5750 * 0 on success, -errno on failure.
5752 int ata_slave_link_init(struct ata_port *ap)
5754 struct ata_link *link;
5756 WARN_ON(ap->slave_link);
5757 WARN_ON(ap->flags & ATA_FLAG_PMP);
5759 link = kzalloc(sizeof(*link), GFP_KERNEL);
5763 ata_link_init(ap, link, 1);
5764 ap->slave_link = link;
5768 static void ata_host_stop(struct device *gendev, void *res)
5770 struct ata_host *host = dev_get_drvdata(gendev);
5773 WARN_ON(!(host->flags & ATA_HOST_STARTED));
5775 for (i = 0; i < host->n_ports; i++) {
5776 struct ata_port *ap = host->ports[i];
5778 if (ap->ops->port_stop)
5779 ap->ops->port_stop(ap);
5782 if (host->ops->host_stop)
5783 host->ops->host_stop(host);
5787 * ata_finalize_port_ops - finalize ata_port_operations
5788 * @ops: ata_port_operations to finalize
5790 * An ata_port_operations can inherit from another ops and that
5791 * ops can again inherit from another. This can go on as many
5792 * times as necessary as long as there is no loop in the
5793 * inheritance chain.
5795 * Ops tables are finalized when the host is started. NULL or
5796 * unspecified entries are inherited from the closet ancestor
5797 * which has the method and the entry is populated with it.
5798 * After finalization, the ops table directly points to all the
5799 * methods and ->inherits is no longer necessary and cleared.
5801 * Using ATA_OP_NULL, inheriting ops can force a method to NULL.
5806 static void ata_finalize_port_ops(struct ata_port_operations *ops)
5808 static DEFINE_SPINLOCK(lock);
5809 const struct ata_port_operations *cur;
5810 void **begin = (void **)ops;
5811 void **end = (void **)&ops->inherits;
5814 if (!ops || !ops->inherits)
5819 for (cur = ops->inherits; cur; cur = cur->inherits) {
5820 void **inherit = (void **)cur;
5822 for (pp = begin; pp < end; pp++, inherit++)
5827 for (pp = begin; pp < end; pp++)
5831 ops->inherits = NULL;
5837 * ata_host_start - start and freeze ports of an ATA host
5838 * @host: ATA host to start ports for
5840 * Start and then freeze ports of @host. Started status is
5841 * recorded in host->flags, so this function can be called
5842 * multiple times. Ports are guaranteed to get started only
5843 * once. If host->ops isn't initialized yet, its set to the
5844 * first non-dummy port ops.
5847 * Inherited from calling layer (may sleep).
5850 * 0 if all ports are started successfully, -errno otherwise.
5852 int ata_host_start(struct ata_host *host)
5855 void *start_dr = NULL;
5858 if (host->flags & ATA_HOST_STARTED)
5861 ata_finalize_port_ops(host->ops);
5863 for (i = 0; i < host->n_ports; i++) {
5864 struct ata_port *ap = host->ports[i];
5866 ata_finalize_port_ops(ap->ops);
5868 if (!host->ops && !ata_port_is_dummy(ap))
5869 host->ops = ap->ops;
5871 if (ap->ops->port_stop)
5875 if (host->ops->host_stop)
5879 start_dr = devres_alloc(ata_host_stop, 0, GFP_KERNEL);
5884 for (i = 0; i < host->n_ports; i++) {
5885 struct ata_port *ap = host->ports[i];
5887 if (ap->ops->port_start) {
5888 rc = ap->ops->port_start(ap);
5892 "failed to start port %d (errno=%d)\n",
5897 ata_eh_freeze_port(ap);
5901 devres_add(host->dev, start_dr);
5902 host->flags |= ATA_HOST_STARTED;
5907 struct ata_port *ap = host->ports[i];
5909 if (ap->ops->port_stop)
5910 ap->ops->port_stop(ap);
5912 devres_free(start_dr);
5917 * ata_sas_host_init - Initialize a host struct
5918 * @host: host to initialize
5919 * @dev: device host is attached to
5920 * @flags: host flags
5924 * PCI/etc. bus probe sem.
5927 /* KILLME - the only user left is ipr */
5928 void ata_host_init(struct ata_host *host, struct device *dev,
5929 unsigned long flags, struct ata_port_operations *ops)
5931 spin_lock_init(&host->lock);
5932 mutex_init(&host->eh_mutex);
5933 host->n_tags = ATA_MAX_QUEUE - 1;
5935 host->flags = flags;
5939 int ata_port_probe(struct ata_port *ap)
5944 if (ap->ops->error_handler) {
5945 struct ata_eh_info *ehi = &ap->link.eh_info;
5946 unsigned long flags;
5948 /* kick EH for boot probing */
5949 spin_lock_irqsave(ap->lock, flags);
5951 ehi->probe_mask |= ATA_ALL_DEVICES;
5952 ehi->action |= ATA_EH_RESET;
5953 ehi->flags |= ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET;
5955 ap->pflags &= ~ATA_PFLAG_INITIALIZING;
5956 ap->pflags |= ATA_PFLAG_LOADING;
5957 ata_port_schedule_eh(ap);
5959 spin_unlock_irqrestore(ap->lock, flags);
5961 /* wait for EH to finish */
5962 ata_port_wait_eh(ap);
5964 DPRINTK("ata%u: bus probe begin\n", ap->print_id);
5965 rc = ata_bus_probe(ap);
5966 DPRINTK("ata%u: bus probe end\n", ap->print_id);
5972 static void async_port_probe(void *data, async_cookie_t cookie)
5974 struct ata_port *ap = data;
5977 * If we're not allowed to scan this host in parallel,
5978 * we need to wait until all previous scans have completed
5979 * before going further.
5980 * Jeff Garzik says this is only within a controller, so we
5981 * don't need to wait for port 0, only for later ports.
5983 if (!(ap->host->flags & ATA_HOST_PARALLEL_SCAN) && ap->port_no != 0)
5984 async_synchronize_cookie(cookie);
5986 (void)ata_port_probe(ap);
5988 /* in order to keep device order, we need to synchronize at this point */
5989 async_synchronize_cookie(cookie);
5991 ata_scsi_scan_host(ap, 1);
5995 * ata_host_register - register initialized ATA host
5996 * @host: ATA host to register
5997 * @sht: template for SCSI host
5999 * Register initialized ATA host. @host is allocated using
6000 * ata_host_alloc() and fully initialized by LLD. This function
6001 * starts ports, registers @host with ATA and SCSI layers and
6002 * probe registered devices.
6005 * Inherited from calling layer (may sleep).
6008 * 0 on success, -errno otherwise.
6010 int ata_host_register(struct ata_host *host, struct scsi_host_template *sht)
6014 host->n_tags = clamp(sht->can_queue, 1, ATA_MAX_QUEUE - 1);
6016 /* host must have been started */
6017 if (!(host->flags & ATA_HOST_STARTED)) {
6018 dev_err(host->dev, "BUG: trying to register unstarted host\n");
6023 /* Blow away unused ports. This happens when LLD can't
6024 * determine the exact number of ports to allocate at
6027 for (i = host->n_ports; host->ports[i]; i++)
6028 kfree(host->ports[i]);
6030 /* give ports names and add SCSI hosts */
6031 for (i = 0; i < host->n_ports; i++)
6032 host->ports[i]->print_id = ata_print_id++;
6035 /* Create associated sysfs transport objects */
6036 for (i = 0; i < host->n_ports; i++) {
6037 rc = ata_tport_add(host->dev,host->ports[i]);
6043 rc = ata_scsi_add_hosts(host, sht);
6047 /* associate with ACPI nodes */
6048 ata_acpi_associate(host);
6050 /* set cable, sata_spd_limit and report */
6051 for (i = 0; i < host->n_ports; i++) {
6052 struct ata_port *ap = host->ports[i];
6053 unsigned long xfer_mask;
6055 /* set SATA cable type if still unset */
6056 if (ap->cbl == ATA_CBL_NONE && (ap->flags & ATA_FLAG_SATA))
6057 ap->cbl = ATA_CBL_SATA;
6059 /* init sata_spd_limit to the current value */
6060 sata_link_init_spd(&ap->link);
6062 sata_link_init_spd(ap->slave_link);
6064 /* print per-port info to dmesg */
6065 xfer_mask = ata_pack_xfermask(ap->pio_mask, ap->mwdma_mask,
6068 if (!ata_port_is_dummy(ap)) {
6069 ata_port_info(ap, "%cATA max %s %s\n",
6070 (ap->flags & ATA_FLAG_SATA) ? 'S' : 'P',
6071 ata_mode_string(xfer_mask),
6072 ap->link.eh_info.desc);
6073 ata_ehi_clear_desc(&ap->link.eh_info);
6075 ata_port_info(ap, "DUMMY\n");
6078 /* perform each probe asynchronously */
6079 for (i = 0; i < host->n_ports; i++) {
6080 struct ata_port *ap = host->ports[i];
6081 async_schedule(async_port_probe, ap);
6088 ata_tport_delete(host->ports[i]);
6095 * ata_host_activate - start host, request IRQ and register it
6096 * @host: target ATA host
6097 * @irq: IRQ to request
6098 * @irq_handler: irq_handler used when requesting IRQ
6099 * @irq_flags: irq_flags used when requesting IRQ
6100 * @sht: scsi_host_template to use when registering the host
6102 * After allocating an ATA host and initializing it, most libata
6103 * LLDs perform three steps to activate the host - start host,
6104 * request IRQ and register it. This helper takes necessasry
6105 * arguments and performs the three steps in one go.
6107 * An invalid IRQ skips the IRQ registration and expects the host to
6108 * have set polling mode on the port. In this case, @irq_handler
6112 * Inherited from calling layer (may sleep).
6115 * 0 on success, -errno otherwise.
6117 int ata_host_activate(struct ata_host *host, int irq,
6118 irq_handler_t irq_handler, unsigned long irq_flags,
6119 struct scsi_host_template *sht)
6123 rc = ata_host_start(host);
6127 /* Special case for polling mode */
6129 WARN_ON(irq_handler);
6130 return ata_host_register(host, sht);
6133 rc = devm_request_irq(host->dev, irq, irq_handler, irq_flags,
6134 dev_driver_string(host->dev), host);
6138 for (i = 0; i < host->n_ports; i++)
6139 ata_port_desc(host->ports[i], "irq %d", irq);
6141 rc = ata_host_register(host, sht);
6142 /* if failed, just free the IRQ and leave ports alone */
6144 devm_free_irq(host->dev, irq, host);
6150 * ata_port_detach - Detach ATA port in prepration of device removal
6151 * @ap: ATA port to be detached
6153 * Detach all ATA devices and the associated SCSI devices of @ap;
6154 * then, remove the associated SCSI host. @ap is guaranteed to
6155 * be quiescent on return from this function.
6158 * Kernel thread context (may sleep).
6160 static void ata_port_detach(struct ata_port *ap)
6162 unsigned long flags;
6164 if (!ap->ops->error_handler)
6167 /* tell EH we're leaving & flush EH */
6168 spin_lock_irqsave(ap->lock, flags);
6169 ap->pflags |= ATA_PFLAG_UNLOADING;
6170 ata_port_schedule_eh(ap);
6171 spin_unlock_irqrestore(ap->lock, flags);
6173 /* wait till EH commits suicide */
6174 ata_port_wait_eh(ap);
6176 /* it better be dead now */
6177 WARN_ON(!(ap->pflags & ATA_PFLAG_UNLOADED));
6179 cancel_delayed_work_sync(&ap->hotplug_task);
6184 for (i = 0; i < SATA_PMP_MAX_PORTS; i++)
6185 ata_tlink_delete(&ap->pmp_link[i]);
6187 ata_tport_delete(ap);
6189 /* remove the associated SCSI host */
6190 scsi_remove_host(ap->scsi_host);
6194 * ata_host_detach - Detach all ports of an ATA host
6195 * @host: Host to detach
6197 * Detach all ports of @host.
6200 * Kernel thread context (may sleep).
6202 void ata_host_detach(struct ata_host *host)
6206 for (i = 0; i < host->n_ports; i++)
6207 ata_port_detach(host->ports[i]);
6209 /* the host is dead now, dissociate ACPI */
6210 ata_acpi_dissociate(host);
6216 * ata_pci_remove_one - PCI layer callback for device removal
6217 * @pdev: PCI device that was removed
6219 * PCI layer indicates to libata via this hook that hot-unplug or
6220 * module unload event has occurred. Detach all ports. Resource
6221 * release is handled via devres.
6224 * Inherited from PCI layer (may sleep).
6226 void ata_pci_remove_one(struct pci_dev *pdev)
6228 struct device *dev = &pdev->dev;
6229 struct ata_host *host = dev_get_drvdata(dev);
6231 ata_host_detach(host);
6234 /* move to PCI subsystem */
6235 int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits)
6237 unsigned long tmp = 0;
6239 switch (bits->width) {
6242 pci_read_config_byte(pdev, bits->reg, &tmp8);
6248 pci_read_config_word(pdev, bits->reg, &tmp16);
6254 pci_read_config_dword(pdev, bits->reg, &tmp32);
6265 return (tmp == bits->val) ? 1 : 0;
6269 void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg)
6271 pci_save_state(pdev);
6272 pci_disable_device(pdev);
6274 if (mesg.event & PM_EVENT_SLEEP)
6275 pci_set_power_state(pdev, PCI_D3hot);
6278 int ata_pci_device_do_resume(struct pci_dev *pdev)
6282 pci_set_power_state(pdev, PCI_D0);
6283 pci_restore_state(pdev);
6285 rc = pcim_enable_device(pdev);
6288 "failed to enable device after resume (%d)\n", rc);
6292 pci_set_master(pdev);
6296 int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg)
6298 struct ata_host *host = dev_get_drvdata(&pdev->dev);
6301 rc = ata_host_suspend(host, mesg);
6305 ata_pci_device_do_suspend(pdev, mesg);
6310 int ata_pci_device_resume(struct pci_dev *pdev)
6312 struct ata_host *host = dev_get_drvdata(&pdev->dev);
6315 rc = ata_pci_device_do_resume(pdev);
6317 ata_host_resume(host);
6320 #endif /* CONFIG_PM */
6322 #endif /* CONFIG_PCI */
6324 static int __init ata_parse_force_one(char **cur,
6325 struct ata_force_ent *force_ent,
6326 const char **reason)
6328 /* FIXME: Currently, there's no way to tag init const data and
6329 * using __initdata causes build failure on some versions of
6330 * gcc. Once __initdataconst is implemented, add const to the
6331 * following structure.
6333 static struct ata_force_param force_tbl[] __initdata = {
6334 { "40c", .cbl = ATA_CBL_PATA40 },
6335 { "80c", .cbl = ATA_CBL_PATA80 },
6336 { "short40c", .cbl = ATA_CBL_PATA40_SHORT },
6337 { "unk", .cbl = ATA_CBL_PATA_UNK },
6338 { "ign", .cbl = ATA_CBL_PATA_IGN },
6339 { "sata", .cbl = ATA_CBL_SATA },
6340 { "1.5Gbps", .spd_limit = 1 },
6341 { "3.0Gbps", .spd_limit = 2 },
6342 { "noncq", .horkage_on = ATA_HORKAGE_NONCQ },
6343 { "ncq", .horkage_off = ATA_HORKAGE_NONCQ },
6344 { "dump_id", .horkage_on = ATA_HORKAGE_DUMP_ID },
6345 { "pio0", .xfer_mask = 1 << (ATA_SHIFT_PIO + 0) },
6346 { "pio1", .xfer_mask = 1 << (ATA_SHIFT_PIO + 1) },
6347 { "pio2", .xfer_mask = 1 << (ATA_SHIFT_PIO + 2) },
6348 { "pio3", .xfer_mask = 1 << (ATA_SHIFT_PIO + 3) },
6349 { "pio4", .xfer_mask = 1 << (ATA_SHIFT_PIO + 4) },
6350 { "pio5", .xfer_mask = 1 << (ATA_SHIFT_PIO + 5) },
6351 { "pio6", .xfer_mask = 1 << (ATA_SHIFT_PIO + 6) },
6352 { "mwdma0", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 0) },
6353 { "mwdma1", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 1) },
6354 { "mwdma2", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 2) },
6355 { "mwdma3", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 3) },
6356 { "mwdma4", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 4) },
6357 { "udma0", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 0) },
6358 { "udma16", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 0) },
6359 { "udma/16", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 0) },
6360 { "udma1", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 1) },
6361 { "udma25", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 1) },
6362 { "udma/25", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 1) },
6363 { "udma2", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 2) },
6364 { "udma33", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 2) },
6365 { "udma/33", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 2) },
6366 { "udma3", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 3) },
6367 { "udma44", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 3) },
6368 { "udma/44", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 3) },
6369 { "udma4", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 4) },
6370 { "udma66", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 4) },
6371 { "udma/66", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 4) },
6372 { "udma5", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 5) },
6373 { "udma100", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 5) },
6374 { "udma/100", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 5) },
6375 { "udma6", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 6) },
6376 { "udma133", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 6) },
6377 { "udma/133", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 6) },
6378 { "udma7", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 7) },
6379 { "nohrst", .lflags = ATA_LFLAG_NO_HRST },
6380 { "nosrst", .lflags = ATA_LFLAG_NO_SRST },
6381 { "norst", .lflags = ATA_LFLAG_NO_HRST | ATA_LFLAG_NO_SRST },
6382 { "disable", .horkage_on = ATA_HORKAGE_DISABLE },
6384 char *start = *cur, *p = *cur;
6385 char *id, *val, *endp;
6386 const struct ata_force_param *match_fp = NULL;
6387 int nr_matches = 0, i;
6389 /* find where this param ends and update *cur */
6390 while (*p != '\0' && *p != ',')
6401 p = strchr(start, ':');
6403 val = strstrip(start);
6408 id = strstrip(start);
6409 val = strstrip(p + 1);
6412 p = strchr(id, '.');
6415 force_ent->device = simple_strtoul(p, &endp, 10);
6416 if (p == endp || *endp != '\0') {
6417 *reason = "invalid device";
6422 force_ent->port = simple_strtoul(id, &endp, 10);
6423 if (p == endp || *endp != '\0') {
6424 *reason = "invalid port/link";
6429 /* parse val, allow shortcuts so that both 1.5 and 1.5Gbps work */
6430 for (i = 0; i < ARRAY_SIZE(force_tbl); i++) {
6431 const struct ata_force_param *fp = &force_tbl[i];
6433 if (strncasecmp(val, fp->name, strlen(val)))
6439 if (strcasecmp(val, fp->name) == 0) {
6446 *reason = "unknown value";
6449 if (nr_matches > 1) {
6450 *reason = "ambigious value";
6454 force_ent->param = *match_fp;
6459 static void __init ata_parse_force_param(void)
6461 int idx = 0, size = 1;
6462 int last_port = -1, last_device = -1;
6463 char *p, *cur, *next;
6465 /* calculate maximum number of params and allocate force_tbl */
6466 for (p = ata_force_param_buf; *p; p++)
6470 ata_force_tbl = kzalloc(sizeof(ata_force_tbl[0]) * size, GFP_KERNEL);
6471 if (!ata_force_tbl) {
6472 printk(KERN_WARNING "ata: failed to extend force table, "
6473 "libata.force ignored\n");
6477 /* parse and populate the table */
6478 for (cur = ata_force_param_buf; *cur != '\0'; cur = next) {
6479 const char *reason = "";
6480 struct ata_force_ent te = { .port = -1, .device = -1 };
6483 if (ata_parse_force_one(&next, &te, &reason)) {
6484 printk(KERN_WARNING "ata: failed to parse force "
6485 "parameter \"%s\" (%s)\n",
6490 if (te.port == -1) {
6491 te.port = last_port;
6492 te.device = last_device;
6495 ata_force_tbl[idx++] = te;
6497 last_port = te.port;
6498 last_device = te.device;
6501 ata_force_tbl_size = idx;
6504 static int __init ata_init(void)
6508 ata_parse_force_param();
6510 rc = ata_sff_init();
6512 kfree(ata_force_tbl);
6516 libata_transport_init();
6517 ata_scsi_transport_template = ata_attach_transport();
6518 if (!ata_scsi_transport_template) {
6524 printk(KERN_DEBUG "libata version " DRV_VERSION " loaded.\n");
6531 static void __exit ata_exit(void)
6533 ata_release_transport(ata_scsi_transport_template);
6534 libata_transport_exit();
6536 kfree(ata_force_tbl);
6539 subsys_initcall(ata_init);
6540 module_exit(ata_exit);
6542 static DEFINE_RATELIMIT_STATE(ratelimit, HZ / 5, 1);
6544 int ata_ratelimit(void)
6546 return __ratelimit(&ratelimit);
6550 * ata_msleep - ATA EH owner aware msleep
6551 * @ap: ATA port to attribute the sleep to
6552 * @msecs: duration to sleep in milliseconds
6554 * Sleeps @msecs. If the current task is owner of @ap's EH, the
6555 * ownership is released before going to sleep and reacquired
6556 * after the sleep is complete. IOW, other ports sharing the
6557 * @ap->host will be allowed to own the EH while this task is
6563 void ata_msleep(struct ata_port *ap, unsigned int msecs)
6565 bool owns_eh = ap && ap->host->eh_owner == current;
6577 * ata_wait_register - wait until register value changes
6578 * @ap: ATA port to wait register for, can be NULL
6579 * @reg: IO-mapped register
6580 * @mask: Mask to apply to read register value
6581 * @val: Wait condition
6582 * @interval: polling interval in milliseconds
6583 * @timeout: timeout in milliseconds
6585 * Waiting for some bits of register to change is a common
6586 * operation for ATA controllers. This function reads 32bit LE
6587 * IO-mapped register @reg and tests for the following condition.
6589 * (*@reg & mask) != val
6591 * If the condition is met, it returns; otherwise, the process is
6592 * repeated after @interval_msec until timeout.
6595 * Kernel thread context (may sleep)
6598 * The final register value.
6600 u32 ata_wait_register(struct ata_port *ap, void __iomem *reg, u32 mask, u32 val,
6601 unsigned long interval, unsigned long timeout)
6603 unsigned long deadline;
6606 tmp = ioread32(reg);
6608 /* Calculate timeout _after_ the first read to make sure
6609 * preceding writes reach the controller before starting to
6610 * eat away the timeout.
6612 deadline = ata_deadline(jiffies, timeout);
6614 while ((tmp & mask) == val && time_before(jiffies, deadline)) {
6615 ata_msleep(ap, interval);
6616 tmp = ioread32(reg);
6623 * sata_lpm_ignore_phy_events - test if PHY event should be ignored
6624 * @link: Link receiving the event
6626 * Test whether the received PHY event has to be ignored or not.
6632 * True if the event has to be ignored.
6634 bool sata_lpm_ignore_phy_events(struct ata_link *link)
6636 unsigned long lpm_timeout = link->last_lpm_change +
6637 msecs_to_jiffies(ATA_TMOUT_SPURIOUS_PHY);
6639 /* if LPM is enabled, PHYRDY doesn't mean anything */
6640 if (link->lpm_policy > ATA_LPM_MAX_POWER)
6643 /* ignore the first PHY event after the LPM policy changed
6644 * as it is might be spurious
6646 if ((link->flags & ATA_LFLAG_CHANGED) &&
6647 time_before(jiffies, lpm_timeout))
6652 EXPORT_SYMBOL_GPL(sata_lpm_ignore_phy_events);
6657 static unsigned int ata_dummy_qc_issue(struct ata_queued_cmd *qc)
6659 return AC_ERR_SYSTEM;
6662 static void ata_dummy_error_handler(struct ata_port *ap)
6667 struct ata_port_operations ata_dummy_port_ops = {
6668 .qc_prep = ata_noop_qc_prep,
6669 .qc_issue = ata_dummy_qc_issue,
6670 .error_handler = ata_dummy_error_handler,
6673 const struct ata_port_info ata_dummy_port_info = {
6674 .port_ops = &ata_dummy_port_ops,
6678 * Utility print functions
6680 int ata_port_printk(const struct ata_port *ap, const char *level,
6681 const char *fmt, ...)
6683 struct va_format vaf;
6687 va_start(args, fmt);
6692 r = printk("%sata%u: %pV", level, ap->print_id, &vaf);
6698 EXPORT_SYMBOL(ata_port_printk);
6700 int ata_link_printk(const struct ata_link *link, const char *level,
6701 const char *fmt, ...)
6703 struct va_format vaf;
6707 va_start(args, fmt);
6712 if (sata_pmp_attached(link->ap) || link->ap->slave_link)
6713 r = printk("%sata%u.%02u: %pV",
6714 level, link->ap->print_id, link->pmp, &vaf);
6716 r = printk("%sata%u: %pV",
6717 level, link->ap->print_id, &vaf);
6723 EXPORT_SYMBOL(ata_link_printk);
6725 int ata_dev_printk(const struct ata_device *dev, const char *level,
6726 const char *fmt, ...)
6728 struct va_format vaf;
6732 va_start(args, fmt);
6737 r = printk("%sata%u.%02u: %pV",
6738 level, dev->link->ap->print_id, dev->link->pmp + dev->devno,
6745 EXPORT_SYMBOL(ata_dev_printk);
6747 void ata_print_version(const struct device *dev, const char *version)
6749 dev_printk(KERN_DEBUG, dev, "version %s\n", version);
6751 EXPORT_SYMBOL(ata_print_version);
6754 * libata is essentially a library of internal helper functions for
6755 * low-level ATA host controller drivers. As such, the API/ABI is
6756 * likely to change as new drivers are added and updated.
6757 * Do not depend on ABI/API stability.
6759 EXPORT_SYMBOL_GPL(sata_deb_timing_normal);
6760 EXPORT_SYMBOL_GPL(sata_deb_timing_hotplug);
6761 EXPORT_SYMBOL_GPL(sata_deb_timing_long);
6762 EXPORT_SYMBOL_GPL(ata_base_port_ops);
6763 EXPORT_SYMBOL_GPL(sata_port_ops);
6764 EXPORT_SYMBOL_GPL(ata_dummy_port_ops);
6765 EXPORT_SYMBOL_GPL(ata_dummy_port_info);
6766 EXPORT_SYMBOL_GPL(ata_link_next);
6767 EXPORT_SYMBOL_GPL(ata_dev_next);
6768 EXPORT_SYMBOL_GPL(ata_std_bios_param);
6769 EXPORT_SYMBOL_GPL(ata_scsi_unlock_native_capacity);
6770 EXPORT_SYMBOL_GPL(ata_host_init);
6771 EXPORT_SYMBOL_GPL(ata_host_alloc);
6772 EXPORT_SYMBOL_GPL(ata_host_alloc_pinfo);
6773 EXPORT_SYMBOL_GPL(ata_slave_link_init);
6774 EXPORT_SYMBOL_GPL(ata_host_start);
6775 EXPORT_SYMBOL_GPL(ata_host_register);
6776 EXPORT_SYMBOL_GPL(ata_host_activate);
6777 EXPORT_SYMBOL_GPL(ata_host_detach);
6778 EXPORT_SYMBOL_GPL(ata_sg_init);
6779 EXPORT_SYMBOL_GPL(ata_qc_complete);
6780 EXPORT_SYMBOL_GPL(ata_qc_complete_multiple);
6781 EXPORT_SYMBOL_GPL(atapi_cmd_type);
6782 EXPORT_SYMBOL_GPL(ata_tf_to_fis);
6783 EXPORT_SYMBOL_GPL(ata_tf_from_fis);
6784 EXPORT_SYMBOL_GPL(ata_pack_xfermask);
6785 EXPORT_SYMBOL_GPL(ata_unpack_xfermask);
6786 EXPORT_SYMBOL_GPL(ata_xfer_mask2mode);
6787 EXPORT_SYMBOL_GPL(ata_xfer_mode2mask);
6788 EXPORT_SYMBOL_GPL(ata_xfer_mode2shift);
6789 EXPORT_SYMBOL_GPL(ata_mode_string);
6790 EXPORT_SYMBOL_GPL(ata_id_xfermask);
6791 EXPORT_SYMBOL_GPL(ata_do_set_mode);
6792 EXPORT_SYMBOL_GPL(ata_std_qc_defer);
6793 EXPORT_SYMBOL_GPL(ata_noop_qc_prep);
6794 EXPORT_SYMBOL_GPL(ata_dev_disable);
6795 EXPORT_SYMBOL_GPL(sata_set_spd);
6796 EXPORT_SYMBOL_GPL(ata_wait_after_reset);
6797 EXPORT_SYMBOL_GPL(sata_link_debounce);
6798 EXPORT_SYMBOL_GPL(sata_link_resume);
6799 EXPORT_SYMBOL_GPL(sata_link_scr_lpm);
6800 EXPORT_SYMBOL_GPL(ata_std_prereset);
6801 EXPORT_SYMBOL_GPL(sata_link_hardreset);
6802 EXPORT_SYMBOL_GPL(sata_std_hardreset);
6803 EXPORT_SYMBOL_GPL(ata_std_postreset);
6804 EXPORT_SYMBOL_GPL(ata_dev_classify);
6805 EXPORT_SYMBOL_GPL(ata_dev_pair);
6806 EXPORT_SYMBOL_GPL(ata_ratelimit);
6807 EXPORT_SYMBOL_GPL(ata_msleep);
6808 EXPORT_SYMBOL_GPL(ata_wait_register);
6809 EXPORT_SYMBOL_GPL(ata_scsi_queuecmd);
6810 EXPORT_SYMBOL_GPL(ata_scsi_slave_config);
6811 EXPORT_SYMBOL_GPL(ata_scsi_slave_destroy);
6812 EXPORT_SYMBOL_GPL(ata_scsi_change_queue_depth);
6813 EXPORT_SYMBOL_GPL(__ata_change_queue_depth);
6814 EXPORT_SYMBOL_GPL(sata_scr_valid);
6815 EXPORT_SYMBOL_GPL(sata_scr_read);
6816 EXPORT_SYMBOL_GPL(sata_scr_write);
6817 EXPORT_SYMBOL_GPL(sata_scr_write_flush);
6818 EXPORT_SYMBOL_GPL(ata_link_online);
6819 EXPORT_SYMBOL_GPL(ata_link_offline);
6821 EXPORT_SYMBOL_GPL(ata_host_suspend);
6822 EXPORT_SYMBOL_GPL(ata_host_resume);
6823 #endif /* CONFIG_PM */
6824 EXPORT_SYMBOL_GPL(ata_id_string);
6825 EXPORT_SYMBOL_GPL(ata_id_c_string);
6826 EXPORT_SYMBOL_GPL(ata_do_dev_read_id);
6827 EXPORT_SYMBOL_GPL(ata_scsi_simulate);
6829 EXPORT_SYMBOL_GPL(ata_pio_need_iordy);
6830 EXPORT_SYMBOL_GPL(ata_timing_find_mode);
6831 EXPORT_SYMBOL_GPL(ata_timing_compute);
6832 EXPORT_SYMBOL_GPL(ata_timing_merge);
6833 EXPORT_SYMBOL_GPL(ata_timing_cycle2mode);
6836 EXPORT_SYMBOL_GPL(pci_test_config_bits);
6837 EXPORT_SYMBOL_GPL(ata_pci_remove_one);
6839 EXPORT_SYMBOL_GPL(ata_pci_device_do_suspend);
6840 EXPORT_SYMBOL_GPL(ata_pci_device_do_resume);
6841 EXPORT_SYMBOL_GPL(ata_pci_device_suspend);
6842 EXPORT_SYMBOL_GPL(ata_pci_device_resume);
6843 #endif /* CONFIG_PM */
6844 #endif /* CONFIG_PCI */
6846 EXPORT_SYMBOL_GPL(__ata_ehi_push_desc);
6847 EXPORT_SYMBOL_GPL(ata_ehi_push_desc);
6848 EXPORT_SYMBOL_GPL(ata_ehi_clear_desc);
6849 EXPORT_SYMBOL_GPL(ata_port_desc);
6851 EXPORT_SYMBOL_GPL(ata_port_pbar_desc);
6852 #endif /* CONFIG_PCI */
6853 EXPORT_SYMBOL_GPL(ata_port_schedule_eh);
6854 EXPORT_SYMBOL_GPL(ata_link_abort);
6855 EXPORT_SYMBOL_GPL(ata_port_abort);
6856 EXPORT_SYMBOL_GPL(ata_port_freeze);
6857 EXPORT_SYMBOL_GPL(sata_async_notification);
6858 EXPORT_SYMBOL_GPL(ata_eh_freeze_port);
6859 EXPORT_SYMBOL_GPL(ata_eh_thaw_port);
6860 EXPORT_SYMBOL_GPL(ata_eh_qc_complete);
6861 EXPORT_SYMBOL_GPL(ata_eh_qc_retry);
6862 EXPORT_SYMBOL_GPL(ata_eh_analyze_ncq_error);
6863 EXPORT_SYMBOL_GPL(ata_do_eh);
6864 EXPORT_SYMBOL_GPL(ata_std_error_handler);
6866 EXPORT_SYMBOL_GPL(ata_cable_40wire);
6867 EXPORT_SYMBOL_GPL(ata_cable_80wire);
6868 EXPORT_SYMBOL_GPL(ata_cable_unknown);
6869 EXPORT_SYMBOL_GPL(ata_cable_ignore);
6870 EXPORT_SYMBOL_GPL(ata_cable_sata);