2 * libata-core.c - helper library for ATA
4 * Maintained by: Tejun Heo <tj@kernel.org>
5 * Please ALWAYS copy linux-ide@vger.kernel.org
8 * Copyright 2003-2004 Red Hat, Inc. All rights reserved.
9 * Copyright 2003-2004 Jeff Garzik
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2, or (at your option)
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; see the file COPYING. If not, write to
24 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
27 * libata documentation is available via 'make {ps|pdf}docs',
28 * as Documentation/DocBook/libata.*
30 * Hardware documentation available from http://www.t13.org/ and
31 * http://www.sata-io.org/
33 * Standards documents from:
34 * http://www.t13.org (ATA standards, PCI DMA IDE spec)
35 * http://www.t10.org (SCSI MMC - for ATAPI MMC)
36 * http://www.sata-io.org (SATA)
37 * http://www.compactflash.org (CF)
38 * http://www.qic.org (QIC157 - Tape and DSC)
39 * http://www.ce-ata.org (CE-ATA: not supported)
43 #include <linux/kernel.h>
44 #include <linux/module.h>
45 #include <linux/pci.h>
46 #include <linux/init.h>
47 #include <linux/list.h>
49 #include <linux/spinlock.h>
50 #include <linux/blkdev.h>
51 #include <linux/delay.h>
52 #include <linux/timer.h>
53 #include <linux/interrupt.h>
54 #include <linux/completion.h>
55 #include <linux/suspend.h>
56 #include <linux/workqueue.h>
57 #include <linux/scatterlist.h>
59 #include <linux/async.h>
60 #include <linux/log2.h>
61 #include <linux/slab.h>
62 #include <scsi/scsi.h>
63 #include <scsi/scsi_cmnd.h>
64 #include <scsi/scsi_host.h>
65 #include <linux/libata.h>
66 #include <asm/byteorder.h>
67 #include <linux/cdrom.h>
68 #include <linux/ratelimit.h>
69 #include <linux/pm_runtime.h>
70 #include <linux/platform_device.h>
73 #include "libata-transport.h"
75 /* debounce timing parameters in msecs { interval, duration, timeout } */
76 const unsigned long sata_deb_timing_normal[] = { 5, 100, 2000 };
77 const unsigned long sata_deb_timing_hotplug[] = { 25, 500, 2000 };
78 const unsigned long sata_deb_timing_long[] = { 100, 2000, 5000 };
80 const struct ata_port_operations ata_base_port_ops = {
81 .prereset = ata_std_prereset,
82 .postreset = ata_std_postreset,
83 .error_handler = ata_std_error_handler,
84 .sched_eh = ata_std_sched_eh,
85 .end_eh = ata_std_end_eh,
88 const struct ata_port_operations sata_port_ops = {
89 .inherits = &ata_base_port_ops,
91 .qc_defer = ata_std_qc_defer,
92 .hardreset = sata_std_hardreset,
95 static unsigned int ata_dev_init_params(struct ata_device *dev,
96 u16 heads, u16 sectors);
97 static unsigned int ata_dev_set_xfermode(struct ata_device *dev);
98 static void ata_dev_xfermask(struct ata_device *dev);
99 static unsigned long ata_dev_blacklisted(const struct ata_device *dev);
101 atomic_t ata_print_id = ATOMIC_INIT(0);
103 struct ata_force_param {
107 unsigned long xfer_mask;
108 unsigned int horkage_on;
109 unsigned int horkage_off;
113 struct ata_force_ent {
116 struct ata_force_param param;
119 static struct ata_force_ent *ata_force_tbl;
120 static int ata_force_tbl_size;
122 static char ata_force_param_buf[PAGE_SIZE] __initdata;
123 /* param_buf is thrown away after initialization, disallow read */
124 module_param_string(force, ata_force_param_buf, sizeof(ata_force_param_buf), 0);
125 MODULE_PARM_DESC(force, "Force ATA configurations including cable type, link speed and transfer mode (see Documentation/kernel-parameters.txt for details)");
127 static int atapi_enabled = 1;
128 module_param(atapi_enabled, int, 0444);
129 MODULE_PARM_DESC(atapi_enabled, "Enable discovery of ATAPI devices (0=off, 1=on [default])");
131 static int atapi_dmadir = 0;
132 module_param(atapi_dmadir, int, 0444);
133 MODULE_PARM_DESC(atapi_dmadir, "Enable ATAPI DMADIR bridge support (0=off [default], 1=on)");
135 int atapi_passthru16 = 1;
136 module_param(atapi_passthru16, int, 0444);
137 MODULE_PARM_DESC(atapi_passthru16, "Enable ATA_16 passthru for ATAPI devices (0=off, 1=on [default])");
140 module_param_named(fua, libata_fua, int, 0444);
141 MODULE_PARM_DESC(fua, "FUA support (0=off [default], 1=on)");
143 static int ata_ignore_hpa;
144 module_param_named(ignore_hpa, ata_ignore_hpa, int, 0644);
145 MODULE_PARM_DESC(ignore_hpa, "Ignore HPA limit (0=keep BIOS limits, 1=ignore limits, using full disk)");
147 static int libata_dma_mask = ATA_DMA_MASK_ATA|ATA_DMA_MASK_ATAPI|ATA_DMA_MASK_CFA;
148 module_param_named(dma, libata_dma_mask, int, 0444);
149 MODULE_PARM_DESC(dma, "DMA enable/disable (0x1==ATA, 0x2==ATAPI, 0x4==CF)");
151 static int ata_probe_timeout;
152 module_param(ata_probe_timeout, int, 0444);
153 MODULE_PARM_DESC(ata_probe_timeout, "Set ATA probing timeout (seconds)");
155 int libata_noacpi = 0;
156 module_param_named(noacpi, libata_noacpi, int, 0444);
157 MODULE_PARM_DESC(noacpi, "Disable the use of ACPI in probe/suspend/resume (0=off [default], 1=on)");
159 int libata_allow_tpm = 0;
160 module_param_named(allow_tpm, libata_allow_tpm, int, 0444);
161 MODULE_PARM_DESC(allow_tpm, "Permit the use of TPM commands (0=off [default], 1=on)");
164 module_param(atapi_an, int, 0444);
165 MODULE_PARM_DESC(atapi_an, "Enable ATAPI AN media presence notification (0=0ff [default], 1=on)");
167 MODULE_AUTHOR("Jeff Garzik");
168 MODULE_DESCRIPTION("Library module for ATA devices");
169 MODULE_LICENSE("GPL");
170 MODULE_VERSION(DRV_VERSION);
173 static bool ata_sstatus_online(u32 sstatus)
175 return (sstatus & 0xf) == 0x3;
179 * ata_link_next - link iteration helper
180 * @link: the previous link, NULL to start
181 * @ap: ATA port containing links to iterate
182 * @mode: iteration mode, one of ATA_LITER_*
185 * Host lock or EH context.
188 * Pointer to the next link.
190 struct ata_link *ata_link_next(struct ata_link *link, struct ata_port *ap,
191 enum ata_link_iter_mode mode)
193 BUG_ON(mode != ATA_LITER_EDGE &&
194 mode != ATA_LITER_PMP_FIRST && mode != ATA_LITER_HOST_FIRST);
196 /* NULL link indicates start of iteration */
200 case ATA_LITER_PMP_FIRST:
201 if (sata_pmp_attached(ap))
204 case ATA_LITER_HOST_FIRST:
208 /* we just iterated over the host link, what's next? */
209 if (link == &ap->link)
211 case ATA_LITER_HOST_FIRST:
212 if (sata_pmp_attached(ap))
215 case ATA_LITER_PMP_FIRST:
216 if (unlikely(ap->slave_link))
217 return ap->slave_link;
223 /* slave_link excludes PMP */
224 if (unlikely(link == ap->slave_link))
227 /* we were over a PMP link */
228 if (++link < ap->pmp_link + ap->nr_pmp_links)
231 if (mode == ATA_LITER_PMP_FIRST)
238 * ata_dev_next - device iteration helper
239 * @dev: the previous device, NULL to start
240 * @link: ATA link containing devices to iterate
241 * @mode: iteration mode, one of ATA_DITER_*
244 * Host lock or EH context.
247 * Pointer to the next device.
249 struct ata_device *ata_dev_next(struct ata_device *dev, struct ata_link *link,
250 enum ata_dev_iter_mode mode)
252 BUG_ON(mode != ATA_DITER_ENABLED && mode != ATA_DITER_ENABLED_REVERSE &&
253 mode != ATA_DITER_ALL && mode != ATA_DITER_ALL_REVERSE);
255 /* NULL dev indicates start of iteration */
258 case ATA_DITER_ENABLED:
262 case ATA_DITER_ENABLED_REVERSE:
263 case ATA_DITER_ALL_REVERSE:
264 dev = link->device + ata_link_max_devices(link) - 1;
269 /* move to the next one */
271 case ATA_DITER_ENABLED:
273 if (++dev < link->device + ata_link_max_devices(link))
276 case ATA_DITER_ENABLED_REVERSE:
277 case ATA_DITER_ALL_REVERSE:
278 if (--dev >= link->device)
284 if ((mode == ATA_DITER_ENABLED || mode == ATA_DITER_ENABLED_REVERSE) &&
285 !ata_dev_enabled(dev))
291 * ata_dev_phys_link - find physical link for a device
292 * @dev: ATA device to look up physical link for
294 * Look up physical link which @dev is attached to. Note that
295 * this is different from @dev->link only when @dev is on slave
296 * link. For all other cases, it's the same as @dev->link.
302 * Pointer to the found physical link.
304 struct ata_link *ata_dev_phys_link(struct ata_device *dev)
306 struct ata_port *ap = dev->link->ap;
312 return ap->slave_link;
316 * ata_force_cbl - force cable type according to libata.force
317 * @ap: ATA port of interest
319 * Force cable type according to libata.force and whine about it.
320 * The last entry which has matching port number is used, so it
321 * can be specified as part of device force parameters. For
322 * example, both "a:40c,1.00:udma4" and "1.00:40c,udma4" have the
328 void ata_force_cbl(struct ata_port *ap)
332 for (i = ata_force_tbl_size - 1; i >= 0; i--) {
333 const struct ata_force_ent *fe = &ata_force_tbl[i];
335 if (fe->port != -1 && fe->port != ap->print_id)
338 if (fe->param.cbl == ATA_CBL_NONE)
341 ap->cbl = fe->param.cbl;
342 ata_port_notice(ap, "FORCE: cable set to %s\n", fe->param.name);
348 * ata_force_link_limits - force link limits according to libata.force
349 * @link: ATA link of interest
351 * Force link flags and SATA spd limit according to libata.force
352 * and whine about it. When only the port part is specified
353 * (e.g. 1:), the limit applies to all links connected to both
354 * the host link and all fan-out ports connected via PMP. If the
355 * device part is specified as 0 (e.g. 1.00:), it specifies the
356 * first fan-out link not the host link. Device number 15 always
357 * points to the host link whether PMP is attached or not. If the
358 * controller has slave link, device number 16 points to it.
363 static void ata_force_link_limits(struct ata_link *link)
365 bool did_spd = false;
366 int linkno = link->pmp;
369 if (ata_is_host_link(link))
372 for (i = ata_force_tbl_size - 1; i >= 0; i--) {
373 const struct ata_force_ent *fe = &ata_force_tbl[i];
375 if (fe->port != -1 && fe->port != link->ap->print_id)
378 if (fe->device != -1 && fe->device != linkno)
381 /* only honor the first spd limit */
382 if (!did_spd && fe->param.spd_limit) {
383 link->hw_sata_spd_limit = (1 << fe->param.spd_limit) - 1;
384 ata_link_notice(link, "FORCE: PHY spd limit set to %s\n",
389 /* let lflags stack */
390 if (fe->param.lflags) {
391 link->flags |= fe->param.lflags;
392 ata_link_notice(link,
393 "FORCE: link flag 0x%x forced -> 0x%x\n",
394 fe->param.lflags, link->flags);
400 * ata_force_xfermask - force xfermask according to libata.force
401 * @dev: ATA device of interest
403 * Force xfer_mask according to libata.force and whine about it.
404 * For consistency with link selection, device number 15 selects
405 * the first device connected to the host link.
410 static void ata_force_xfermask(struct ata_device *dev)
412 int devno = dev->link->pmp + dev->devno;
413 int alt_devno = devno;
416 /* allow n.15/16 for devices attached to host port */
417 if (ata_is_host_link(dev->link))
420 for (i = ata_force_tbl_size - 1; i >= 0; i--) {
421 const struct ata_force_ent *fe = &ata_force_tbl[i];
422 unsigned long pio_mask, mwdma_mask, udma_mask;
424 if (fe->port != -1 && fe->port != dev->link->ap->print_id)
427 if (fe->device != -1 && fe->device != devno &&
428 fe->device != alt_devno)
431 if (!fe->param.xfer_mask)
434 ata_unpack_xfermask(fe->param.xfer_mask,
435 &pio_mask, &mwdma_mask, &udma_mask);
437 dev->udma_mask = udma_mask;
438 else if (mwdma_mask) {
440 dev->mwdma_mask = mwdma_mask;
444 dev->pio_mask = pio_mask;
447 ata_dev_notice(dev, "FORCE: xfer_mask set to %s\n",
454 * ata_force_horkage - force horkage according to libata.force
455 * @dev: ATA device of interest
457 * Force horkage according to libata.force and whine about it.
458 * For consistency with link selection, device number 15 selects
459 * the first device connected to the host link.
464 static void ata_force_horkage(struct ata_device *dev)
466 int devno = dev->link->pmp + dev->devno;
467 int alt_devno = devno;
470 /* allow n.15/16 for devices attached to host port */
471 if (ata_is_host_link(dev->link))
474 for (i = 0; i < ata_force_tbl_size; i++) {
475 const struct ata_force_ent *fe = &ata_force_tbl[i];
477 if (fe->port != -1 && fe->port != dev->link->ap->print_id)
480 if (fe->device != -1 && fe->device != devno &&
481 fe->device != alt_devno)
484 if (!(~dev->horkage & fe->param.horkage_on) &&
485 !(dev->horkage & fe->param.horkage_off))
488 dev->horkage |= fe->param.horkage_on;
489 dev->horkage &= ~fe->param.horkage_off;
491 ata_dev_notice(dev, "FORCE: horkage modified (%s)\n",
497 * atapi_cmd_type - Determine ATAPI command type from SCSI opcode
498 * @opcode: SCSI opcode
500 * Determine ATAPI command type from @opcode.
506 * ATAPI_{READ|WRITE|READ_CD|PASS_THRU|MISC}
508 int atapi_cmd_type(u8 opcode)
517 case GPCMD_WRITE_AND_VERIFY_10:
521 case GPCMD_READ_CD_MSF:
522 return ATAPI_READ_CD;
526 if (atapi_passthru16)
527 return ATAPI_PASS_THRU;
535 * ata_tf_to_fis - Convert ATA taskfile to SATA FIS structure
536 * @tf: Taskfile to convert
537 * @pmp: Port multiplier port
538 * @is_cmd: This FIS is for command
539 * @fis: Buffer into which data will output
541 * Converts a standard ATA taskfile to a Serial ATA
542 * FIS structure (Register - Host to Device).
545 * Inherited from caller.
547 void ata_tf_to_fis(const struct ata_taskfile *tf, u8 pmp, int is_cmd, u8 *fis)
549 fis[0] = 0x27; /* Register - Host to Device FIS */
550 fis[1] = pmp & 0xf; /* Port multiplier number*/
552 fis[1] |= (1 << 7); /* bit 7 indicates Command FIS */
554 fis[2] = tf->command;
555 fis[3] = tf->feature;
562 fis[8] = tf->hob_lbal;
563 fis[9] = tf->hob_lbam;
564 fis[10] = tf->hob_lbah;
565 fis[11] = tf->hob_feature;
568 fis[13] = tf->hob_nsect;
579 * ata_tf_from_fis - Convert SATA FIS to ATA taskfile
580 * @fis: Buffer from which data will be input
581 * @tf: Taskfile to output
583 * Converts a serial ATA FIS structure to a standard ATA taskfile.
586 * Inherited from caller.
589 void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf)
591 tf->command = fis[2]; /* status */
592 tf->feature = fis[3]; /* error */
599 tf->hob_lbal = fis[8];
600 tf->hob_lbam = fis[9];
601 tf->hob_lbah = fis[10];
604 tf->hob_nsect = fis[13];
607 static const u8 ata_rw_cmds[] = {
611 ATA_CMD_READ_MULTI_EXT,
612 ATA_CMD_WRITE_MULTI_EXT,
616 ATA_CMD_WRITE_MULTI_FUA_EXT,
620 ATA_CMD_PIO_READ_EXT,
621 ATA_CMD_PIO_WRITE_EXT,
634 ATA_CMD_WRITE_FUA_EXT
638 * ata_rwcmd_protocol - set taskfile r/w commands and protocol
639 * @tf: command to examine and configure
640 * @dev: device tf belongs to
642 * Examine the device configuration and tf->flags to calculate
643 * the proper read/write commands and protocol to use.
648 static int ata_rwcmd_protocol(struct ata_taskfile *tf, struct ata_device *dev)
652 int index, fua, lba48, write;
654 fua = (tf->flags & ATA_TFLAG_FUA) ? 4 : 0;
655 lba48 = (tf->flags & ATA_TFLAG_LBA48) ? 2 : 0;
656 write = (tf->flags & ATA_TFLAG_WRITE) ? 1 : 0;
658 if (dev->flags & ATA_DFLAG_PIO) {
659 tf->protocol = ATA_PROT_PIO;
660 index = dev->multi_count ? 0 : 8;
661 } else if (lba48 && (dev->link->ap->flags & ATA_FLAG_PIO_LBA48)) {
662 /* Unable to use DMA due to host limitation */
663 tf->protocol = ATA_PROT_PIO;
664 index = dev->multi_count ? 0 : 8;
666 tf->protocol = ATA_PROT_DMA;
670 cmd = ata_rw_cmds[index + fua + lba48 + write];
679 * ata_tf_read_block - Read block address from ATA taskfile
680 * @tf: ATA taskfile of interest
681 * @dev: ATA device @tf belongs to
686 * Read block address from @tf. This function can handle all
687 * three address formats - LBA, LBA48 and CHS. tf->protocol and
688 * flags select the address format to use.
691 * Block address read from @tf.
693 u64 ata_tf_read_block(struct ata_taskfile *tf, struct ata_device *dev)
697 if (tf->flags & ATA_TFLAG_LBA) {
698 if (tf->flags & ATA_TFLAG_LBA48) {
699 block |= (u64)tf->hob_lbah << 40;
700 block |= (u64)tf->hob_lbam << 32;
701 block |= (u64)tf->hob_lbal << 24;
703 block |= (tf->device & 0xf) << 24;
705 block |= tf->lbah << 16;
706 block |= tf->lbam << 8;
711 cyl = tf->lbam | (tf->lbah << 8);
712 head = tf->device & 0xf;
717 "device reported invalid CHS sector 0\n");
718 sect = 1; /* oh well */
721 block = (cyl * dev->heads + head) * dev->sectors + sect - 1;
728 * ata_build_rw_tf - Build ATA taskfile for given read/write request
729 * @tf: Target ATA taskfile
730 * @dev: ATA device @tf belongs to
731 * @block: Block address
732 * @n_block: Number of blocks
733 * @tf_flags: RW/FUA etc...
739 * Build ATA taskfile @tf for read/write request described by
740 * @block, @n_block, @tf_flags and @tag on @dev.
744 * 0 on success, -ERANGE if the request is too large for @dev,
745 * -EINVAL if the request is invalid.
747 int ata_build_rw_tf(struct ata_taskfile *tf, struct ata_device *dev,
748 u64 block, u32 n_block, unsigned int tf_flags,
751 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
752 tf->flags |= tf_flags;
754 if (ata_ncq_enabled(dev) && likely(tag != ATA_TAG_INTERNAL)) {
756 if (!lba_48_ok(block, n_block))
759 tf->protocol = ATA_PROT_NCQ;
760 tf->flags |= ATA_TFLAG_LBA | ATA_TFLAG_LBA48;
762 if (tf->flags & ATA_TFLAG_WRITE)
763 tf->command = ATA_CMD_FPDMA_WRITE;
765 tf->command = ATA_CMD_FPDMA_READ;
767 tf->nsect = tag << 3;
768 tf->hob_feature = (n_block >> 8) & 0xff;
769 tf->feature = n_block & 0xff;
771 tf->hob_lbah = (block >> 40) & 0xff;
772 tf->hob_lbam = (block >> 32) & 0xff;
773 tf->hob_lbal = (block >> 24) & 0xff;
774 tf->lbah = (block >> 16) & 0xff;
775 tf->lbam = (block >> 8) & 0xff;
776 tf->lbal = block & 0xff;
778 tf->device = ATA_LBA;
779 if (tf->flags & ATA_TFLAG_FUA)
780 tf->device |= 1 << 7;
781 } else if (dev->flags & ATA_DFLAG_LBA) {
782 tf->flags |= ATA_TFLAG_LBA;
784 if (lba_28_ok(block, n_block)) {
786 tf->device |= (block >> 24) & 0xf;
787 } else if (lba_48_ok(block, n_block)) {
788 if (!(dev->flags & ATA_DFLAG_LBA48))
792 tf->flags |= ATA_TFLAG_LBA48;
794 tf->hob_nsect = (n_block >> 8) & 0xff;
796 tf->hob_lbah = (block >> 40) & 0xff;
797 tf->hob_lbam = (block >> 32) & 0xff;
798 tf->hob_lbal = (block >> 24) & 0xff;
800 /* request too large even for LBA48 */
803 if (unlikely(ata_rwcmd_protocol(tf, dev) < 0))
806 tf->nsect = n_block & 0xff;
808 tf->lbah = (block >> 16) & 0xff;
809 tf->lbam = (block >> 8) & 0xff;
810 tf->lbal = block & 0xff;
812 tf->device |= ATA_LBA;
815 u32 sect, head, cyl, track;
817 /* The request -may- be too large for CHS addressing. */
818 if (!lba_28_ok(block, n_block))
821 if (unlikely(ata_rwcmd_protocol(tf, dev) < 0))
824 /* Convert LBA to CHS */
825 track = (u32)block / dev->sectors;
826 cyl = track / dev->heads;
827 head = track % dev->heads;
828 sect = (u32)block % dev->sectors + 1;
830 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
831 (u32)block, track, cyl, head, sect);
833 /* Check whether the converted CHS can fit.
837 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
840 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
851 * ata_pack_xfermask - Pack pio, mwdma and udma masks into xfer_mask
852 * @pio_mask: pio_mask
853 * @mwdma_mask: mwdma_mask
854 * @udma_mask: udma_mask
856 * Pack @pio_mask, @mwdma_mask and @udma_mask into a single
857 * unsigned int xfer_mask.
865 unsigned long ata_pack_xfermask(unsigned long pio_mask,
866 unsigned long mwdma_mask,
867 unsigned long udma_mask)
869 return ((pio_mask << ATA_SHIFT_PIO) & ATA_MASK_PIO) |
870 ((mwdma_mask << ATA_SHIFT_MWDMA) & ATA_MASK_MWDMA) |
871 ((udma_mask << ATA_SHIFT_UDMA) & ATA_MASK_UDMA);
875 * ata_unpack_xfermask - Unpack xfer_mask into pio, mwdma and udma masks
876 * @xfer_mask: xfer_mask to unpack
877 * @pio_mask: resulting pio_mask
878 * @mwdma_mask: resulting mwdma_mask
879 * @udma_mask: resulting udma_mask
881 * Unpack @xfer_mask into @pio_mask, @mwdma_mask and @udma_mask.
882 * Any NULL distination masks will be ignored.
884 void ata_unpack_xfermask(unsigned long xfer_mask, unsigned long *pio_mask,
885 unsigned long *mwdma_mask, unsigned long *udma_mask)
888 *pio_mask = (xfer_mask & ATA_MASK_PIO) >> ATA_SHIFT_PIO;
890 *mwdma_mask = (xfer_mask & ATA_MASK_MWDMA) >> ATA_SHIFT_MWDMA;
892 *udma_mask = (xfer_mask & ATA_MASK_UDMA) >> ATA_SHIFT_UDMA;
895 static const struct ata_xfer_ent {
899 { ATA_SHIFT_PIO, ATA_NR_PIO_MODES, XFER_PIO_0 },
900 { ATA_SHIFT_MWDMA, ATA_NR_MWDMA_MODES, XFER_MW_DMA_0 },
901 { ATA_SHIFT_UDMA, ATA_NR_UDMA_MODES, XFER_UDMA_0 },
906 * ata_xfer_mask2mode - Find matching XFER_* for the given xfer_mask
907 * @xfer_mask: xfer_mask of interest
909 * Return matching XFER_* value for @xfer_mask. Only the highest
910 * bit of @xfer_mask is considered.
916 * Matching XFER_* value, 0xff if no match found.
918 u8 ata_xfer_mask2mode(unsigned long xfer_mask)
920 int highbit = fls(xfer_mask) - 1;
921 const struct ata_xfer_ent *ent;
923 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
924 if (highbit >= ent->shift && highbit < ent->shift + ent->bits)
925 return ent->base + highbit - ent->shift;
930 * ata_xfer_mode2mask - Find matching xfer_mask for XFER_*
931 * @xfer_mode: XFER_* of interest
933 * Return matching xfer_mask for @xfer_mode.
939 * Matching xfer_mask, 0 if no match found.
941 unsigned long ata_xfer_mode2mask(u8 xfer_mode)
943 const struct ata_xfer_ent *ent;
945 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
946 if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits)
947 return ((2 << (ent->shift + xfer_mode - ent->base)) - 1)
948 & ~((1 << ent->shift) - 1);
953 * ata_xfer_mode2shift - Find matching xfer_shift for XFER_*
954 * @xfer_mode: XFER_* of interest
956 * Return matching xfer_shift for @xfer_mode.
962 * Matching xfer_shift, -1 if no match found.
964 int ata_xfer_mode2shift(unsigned long xfer_mode)
966 const struct ata_xfer_ent *ent;
968 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
969 if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits)
975 * ata_mode_string - convert xfer_mask to string
976 * @xfer_mask: mask of bits supported; only highest bit counts.
978 * Determine string which represents the highest speed
979 * (highest bit in @modemask).
985 * Constant C string representing highest speed listed in
986 * @mode_mask, or the constant C string "<n/a>".
988 const char *ata_mode_string(unsigned long xfer_mask)
990 static const char * const xfer_mode_str[] = {
1014 highbit = fls(xfer_mask) - 1;
1015 if (highbit >= 0 && highbit < ARRAY_SIZE(xfer_mode_str))
1016 return xfer_mode_str[highbit];
1020 const char *sata_spd_string(unsigned int spd)
1022 static const char * const spd_str[] = {
1028 if (spd == 0 || (spd - 1) >= ARRAY_SIZE(spd_str))
1030 return spd_str[spd - 1];
1034 * ata_dev_classify - determine device type based on ATA-spec signature
1035 * @tf: ATA taskfile register set for device to be identified
1037 * Determine from taskfile register contents whether a device is
1038 * ATA or ATAPI, as per "Signature and persistence" section
1039 * of ATA/PI spec (volume 1, sect 5.14).
1045 * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, %ATA_DEV_PMP or
1046 * %ATA_DEV_UNKNOWN the event of failure.
1048 unsigned int ata_dev_classify(const struct ata_taskfile *tf)
1050 /* Apple's open source Darwin code hints that some devices only
1051 * put a proper signature into the LBA mid/high registers,
1052 * So, we only check those. It's sufficient for uniqueness.
1054 * ATA/ATAPI-7 (d1532v1r1: Feb. 19, 2003) specified separate
1055 * signatures for ATA and ATAPI devices attached on SerialATA,
1056 * 0x3c/0xc3 and 0x69/0x96 respectively. However, SerialATA
1057 * spec has never mentioned about using different signatures
1058 * for ATA/ATAPI devices. Then, Serial ATA II: Port
1059 * Multiplier specification began to use 0x69/0x96 to identify
1060 * port multpliers and 0x3c/0xc3 to identify SEMB device.
1061 * ATA/ATAPI-7 dropped descriptions about 0x3c/0xc3 and
1062 * 0x69/0x96 shortly and described them as reserved for
1065 * We follow the current spec and consider that 0x69/0x96
1066 * identifies a port multiplier and 0x3c/0xc3 a SEMB device.
1067 * Unfortunately, WDC WD1600JS-62MHB5 (a hard drive) reports
1068 * SEMB signature. This is worked around in
1069 * ata_dev_read_id().
1071 if ((tf->lbam == 0) && (tf->lbah == 0)) {
1072 DPRINTK("found ATA device by sig\n");
1076 if ((tf->lbam == 0x14) && (tf->lbah == 0xeb)) {
1077 DPRINTK("found ATAPI device by sig\n");
1078 return ATA_DEV_ATAPI;
1081 if ((tf->lbam == 0x69) && (tf->lbah == 0x96)) {
1082 DPRINTK("found PMP device by sig\n");
1086 if ((tf->lbam == 0x3c) && (tf->lbah == 0xc3)) {
1087 DPRINTK("found SEMB device by sig (could be ATA device)\n");
1088 return ATA_DEV_SEMB;
1091 DPRINTK("unknown device\n");
1092 return ATA_DEV_UNKNOWN;
1096 * ata_id_string - Convert IDENTIFY DEVICE page into string
1097 * @id: IDENTIFY DEVICE results we will examine
1098 * @s: string into which data is output
1099 * @ofs: offset into identify device page
1100 * @len: length of string to return. must be an even number.
1102 * The strings in the IDENTIFY DEVICE page are broken up into
1103 * 16-bit chunks. Run through the string, and output each
1104 * 8-bit chunk linearly, regardless of platform.
1110 void ata_id_string(const u16 *id, unsigned char *s,
1111 unsigned int ofs, unsigned int len)
1132 * ata_id_c_string - Convert IDENTIFY DEVICE page into C string
1133 * @id: IDENTIFY DEVICE results we will examine
1134 * @s: string into which data is output
1135 * @ofs: offset into identify device page
1136 * @len: length of string to return. must be an odd number.
1138 * This function is identical to ata_id_string except that it
1139 * trims trailing spaces and terminates the resulting string with
1140 * null. @len must be actual maximum length (even number) + 1.
1145 void ata_id_c_string(const u16 *id, unsigned char *s,
1146 unsigned int ofs, unsigned int len)
1150 ata_id_string(id, s, ofs, len - 1);
1152 p = s + strnlen(s, len - 1);
1153 while (p > s && p[-1] == ' ')
1158 static u64 ata_id_n_sectors(const u16 *id)
1160 if (ata_id_has_lba(id)) {
1161 if (ata_id_has_lba48(id))
1162 return ata_id_u64(id, ATA_ID_LBA_CAPACITY_2);
1164 return ata_id_u32(id, ATA_ID_LBA_CAPACITY);
1166 if (ata_id_current_chs_valid(id))
1167 return id[ATA_ID_CUR_CYLS] * id[ATA_ID_CUR_HEADS] *
1168 id[ATA_ID_CUR_SECTORS];
1170 return id[ATA_ID_CYLS] * id[ATA_ID_HEADS] *
1175 u64 ata_tf_to_lba48(const struct ata_taskfile *tf)
1179 sectors |= ((u64)(tf->hob_lbah & 0xff)) << 40;
1180 sectors |= ((u64)(tf->hob_lbam & 0xff)) << 32;
1181 sectors |= ((u64)(tf->hob_lbal & 0xff)) << 24;
1182 sectors |= (tf->lbah & 0xff) << 16;
1183 sectors |= (tf->lbam & 0xff) << 8;
1184 sectors |= (tf->lbal & 0xff);
1189 u64 ata_tf_to_lba(const struct ata_taskfile *tf)
1193 sectors |= (tf->device & 0x0f) << 24;
1194 sectors |= (tf->lbah & 0xff) << 16;
1195 sectors |= (tf->lbam & 0xff) << 8;
1196 sectors |= (tf->lbal & 0xff);
1202 * ata_read_native_max_address - Read native max address
1203 * @dev: target device
1204 * @max_sectors: out parameter for the result native max address
1206 * Perform an LBA48 or LBA28 native size query upon the device in
1210 * 0 on success, -EACCES if command is aborted by the drive.
1211 * -EIO on other errors.
1213 static int ata_read_native_max_address(struct ata_device *dev, u64 *max_sectors)
1215 unsigned int err_mask;
1216 struct ata_taskfile tf;
1217 int lba48 = ata_id_has_lba48(dev->id);
1219 ata_tf_init(dev, &tf);
1221 /* always clear all address registers */
1222 tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
1225 tf.command = ATA_CMD_READ_NATIVE_MAX_EXT;
1226 tf.flags |= ATA_TFLAG_LBA48;
1228 tf.command = ATA_CMD_READ_NATIVE_MAX;
1230 tf.protocol |= ATA_PROT_NODATA;
1231 tf.device |= ATA_LBA;
1233 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
1236 "failed to read native max address (err_mask=0x%x)\n",
1238 if (err_mask == AC_ERR_DEV && (tf.feature & ATA_ABORTED))
1244 *max_sectors = ata_tf_to_lba48(&tf) + 1;
1246 *max_sectors = ata_tf_to_lba(&tf) + 1;
1247 if (dev->horkage & ATA_HORKAGE_HPA_SIZE)
1253 * ata_set_max_sectors - Set max sectors
1254 * @dev: target device
1255 * @new_sectors: new max sectors value to set for the device
1257 * Set max sectors of @dev to @new_sectors.
1260 * 0 on success, -EACCES if command is aborted or denied (due to
1261 * previous non-volatile SET_MAX) by the drive. -EIO on other
1264 static int ata_set_max_sectors(struct ata_device *dev, u64 new_sectors)
1266 unsigned int err_mask;
1267 struct ata_taskfile tf;
1268 int lba48 = ata_id_has_lba48(dev->id);
1272 ata_tf_init(dev, &tf);
1274 tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
1277 tf.command = ATA_CMD_SET_MAX_EXT;
1278 tf.flags |= ATA_TFLAG_LBA48;
1280 tf.hob_lbal = (new_sectors >> 24) & 0xff;
1281 tf.hob_lbam = (new_sectors >> 32) & 0xff;
1282 tf.hob_lbah = (new_sectors >> 40) & 0xff;
1284 tf.command = ATA_CMD_SET_MAX;
1286 tf.device |= (new_sectors >> 24) & 0xf;
1289 tf.protocol |= ATA_PROT_NODATA;
1290 tf.device |= ATA_LBA;
1292 tf.lbal = (new_sectors >> 0) & 0xff;
1293 tf.lbam = (new_sectors >> 8) & 0xff;
1294 tf.lbah = (new_sectors >> 16) & 0xff;
1296 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
1299 "failed to set max address (err_mask=0x%x)\n",
1301 if (err_mask == AC_ERR_DEV &&
1302 (tf.feature & (ATA_ABORTED | ATA_IDNF)))
1311 * ata_hpa_resize - Resize a device with an HPA set
1312 * @dev: Device to resize
1314 * Read the size of an LBA28 or LBA48 disk with HPA features and resize
1315 * it if required to the full size of the media. The caller must check
1316 * the drive has the HPA feature set enabled.
1319 * 0 on success, -errno on failure.
1321 static int ata_hpa_resize(struct ata_device *dev)
1323 struct ata_eh_context *ehc = &dev->link->eh_context;
1324 int print_info = ehc->i.flags & ATA_EHI_PRINTINFO;
1325 bool unlock_hpa = ata_ignore_hpa || dev->flags & ATA_DFLAG_UNLOCK_HPA;
1326 u64 sectors = ata_id_n_sectors(dev->id);
1330 /* do we need to do it? */
1331 if (dev->class != ATA_DEV_ATA ||
1332 !ata_id_has_lba(dev->id) || !ata_id_hpa_enabled(dev->id) ||
1333 (dev->horkage & ATA_HORKAGE_BROKEN_HPA))
1336 /* read native max address */
1337 rc = ata_read_native_max_address(dev, &native_sectors);
1339 /* If device aborted the command or HPA isn't going to
1340 * be unlocked, skip HPA resizing.
1342 if (rc == -EACCES || !unlock_hpa) {
1344 "HPA support seems broken, skipping HPA handling\n");
1345 dev->horkage |= ATA_HORKAGE_BROKEN_HPA;
1347 /* we can continue if device aborted the command */
1354 dev->n_native_sectors = native_sectors;
1356 /* nothing to do? */
1357 if (native_sectors <= sectors || !unlock_hpa) {
1358 if (!print_info || native_sectors == sectors)
1361 if (native_sectors > sectors)
1363 "HPA detected: current %llu, native %llu\n",
1364 (unsigned long long)sectors,
1365 (unsigned long long)native_sectors);
1366 else if (native_sectors < sectors)
1368 "native sectors (%llu) is smaller than sectors (%llu)\n",
1369 (unsigned long long)native_sectors,
1370 (unsigned long long)sectors);
1374 /* let's unlock HPA */
1375 rc = ata_set_max_sectors(dev, native_sectors);
1376 if (rc == -EACCES) {
1377 /* if device aborted the command, skip HPA resizing */
1379 "device aborted resize (%llu -> %llu), skipping HPA handling\n",
1380 (unsigned long long)sectors,
1381 (unsigned long long)native_sectors);
1382 dev->horkage |= ATA_HORKAGE_BROKEN_HPA;
1387 /* re-read IDENTIFY data */
1388 rc = ata_dev_reread_id(dev, 0);
1391 "failed to re-read IDENTIFY data after HPA resizing\n");
1396 u64 new_sectors = ata_id_n_sectors(dev->id);
1398 "HPA unlocked: %llu -> %llu, native %llu\n",
1399 (unsigned long long)sectors,
1400 (unsigned long long)new_sectors,
1401 (unsigned long long)native_sectors);
1408 * ata_dump_id - IDENTIFY DEVICE info debugging output
1409 * @id: IDENTIFY DEVICE page to dump
1411 * Dump selected 16-bit words from the given IDENTIFY DEVICE
1418 static inline void ata_dump_id(const u16 *id)
1420 DPRINTK("49==0x%04x "
1430 DPRINTK("80==0x%04x "
1440 DPRINTK("88==0x%04x "
1447 * ata_id_xfermask - Compute xfermask from the given IDENTIFY data
1448 * @id: IDENTIFY data to compute xfer mask from
1450 * Compute the xfermask for this device. This is not as trivial
1451 * as it seems if we must consider early devices correctly.
1453 * FIXME: pre IDE drive timing (do we care ?).
1461 unsigned long ata_id_xfermask(const u16 *id)
1463 unsigned long pio_mask, mwdma_mask, udma_mask;
1465 /* Usual case. Word 53 indicates word 64 is valid */
1466 if (id[ATA_ID_FIELD_VALID] & (1 << 1)) {
1467 pio_mask = id[ATA_ID_PIO_MODES] & 0x03;
1471 /* If word 64 isn't valid then Word 51 high byte holds
1472 * the PIO timing number for the maximum. Turn it into
1475 u8 mode = (id[ATA_ID_OLD_PIO_MODES] >> 8) & 0xFF;
1476 if (mode < 5) /* Valid PIO range */
1477 pio_mask = (2 << mode) - 1;
1481 /* But wait.. there's more. Design your standards by
1482 * committee and you too can get a free iordy field to
1483 * process. However its the speeds not the modes that
1484 * are supported... Note drivers using the timing API
1485 * will get this right anyway
1489 mwdma_mask = id[ATA_ID_MWDMA_MODES] & 0x07;
1491 if (ata_id_is_cfa(id)) {
1493 * Process compact flash extended modes
1495 int pio = (id[ATA_ID_CFA_MODES] >> 0) & 0x7;
1496 int dma = (id[ATA_ID_CFA_MODES] >> 3) & 0x7;
1499 pio_mask |= (1 << 5);
1501 pio_mask |= (1 << 6);
1503 mwdma_mask |= (1 << 3);
1505 mwdma_mask |= (1 << 4);
1509 if (id[ATA_ID_FIELD_VALID] & (1 << 2))
1510 udma_mask = id[ATA_ID_UDMA_MODES] & 0xff;
1512 return ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask);
1515 static void ata_qc_complete_internal(struct ata_queued_cmd *qc)
1517 struct completion *waiting = qc->private_data;
1523 * ata_exec_internal_sg - execute libata internal command
1524 * @dev: Device to which the command is sent
1525 * @tf: Taskfile registers for the command and the result
1526 * @cdb: CDB for packet command
1527 * @dma_dir: Data tranfer direction of the command
1528 * @sgl: sg list for the data buffer of the command
1529 * @n_elem: Number of sg entries
1530 * @timeout: Timeout in msecs (0 for default)
1532 * Executes libata internal command with timeout. @tf contains
1533 * command on entry and result on return. Timeout and error
1534 * conditions are reported via return value. No recovery action
1535 * is taken after a command times out. It's caller's duty to
1536 * clean up after timeout.
1539 * None. Should be called with kernel context, might sleep.
1542 * Zero on success, AC_ERR_* mask on failure
1544 unsigned ata_exec_internal_sg(struct ata_device *dev,
1545 struct ata_taskfile *tf, const u8 *cdb,
1546 int dma_dir, struct scatterlist *sgl,
1547 unsigned int n_elem, unsigned long timeout)
1549 struct ata_link *link = dev->link;
1550 struct ata_port *ap = link->ap;
1551 u8 command = tf->command;
1552 int auto_timeout = 0;
1553 struct ata_queued_cmd *qc;
1554 unsigned int tag, preempted_tag;
1555 u32 preempted_sactive, preempted_qc_active;
1556 int preempted_nr_active_links;
1557 DECLARE_COMPLETION_ONSTACK(wait);
1558 unsigned long flags;
1559 unsigned int err_mask;
1562 spin_lock_irqsave(ap->lock, flags);
1564 /* no internal command while frozen */
1565 if (ap->pflags & ATA_PFLAG_FROZEN) {
1566 spin_unlock_irqrestore(ap->lock, flags);
1567 return AC_ERR_SYSTEM;
1570 /* initialize internal qc */
1572 /* XXX: Tag 0 is used for drivers with legacy EH as some
1573 * drivers choke if any other tag is given. This breaks
1574 * ata_tag_internal() test for those drivers. Don't use new
1575 * EH stuff without converting to it.
1577 if (ap->ops->error_handler)
1578 tag = ATA_TAG_INTERNAL;
1582 if (test_and_set_bit(tag, &ap->qc_allocated))
1584 qc = __ata_qc_from_tag(ap, tag);
1592 preempted_tag = link->active_tag;
1593 preempted_sactive = link->sactive;
1594 preempted_qc_active = ap->qc_active;
1595 preempted_nr_active_links = ap->nr_active_links;
1596 link->active_tag = ATA_TAG_POISON;
1599 ap->nr_active_links = 0;
1601 /* prepare & issue qc */
1604 memcpy(qc->cdb, cdb, ATAPI_CDB_LEN);
1606 /* some SATA bridges need us to indicate data xfer direction */
1607 if (tf->protocol == ATAPI_PROT_DMA && (dev->flags & ATA_DFLAG_DMADIR) &&
1608 dma_dir == DMA_FROM_DEVICE)
1609 qc->tf.feature |= ATAPI_DMADIR;
1611 qc->flags |= ATA_QCFLAG_RESULT_TF;
1612 qc->dma_dir = dma_dir;
1613 if (dma_dir != DMA_NONE) {
1614 unsigned int i, buflen = 0;
1615 struct scatterlist *sg;
1617 for_each_sg(sgl, sg, n_elem, i)
1618 buflen += sg->length;
1620 ata_sg_init(qc, sgl, n_elem);
1621 qc->nbytes = buflen;
1624 qc->private_data = &wait;
1625 qc->complete_fn = ata_qc_complete_internal;
1629 spin_unlock_irqrestore(ap->lock, flags);
1632 if (ata_probe_timeout)
1633 timeout = ata_probe_timeout * 1000;
1635 timeout = ata_internal_cmd_timeout(dev, command);
1640 if (ap->ops->error_handler)
1643 rc = wait_for_completion_timeout(&wait, msecs_to_jiffies(timeout));
1645 if (ap->ops->error_handler)
1648 ata_sff_flush_pio_task(ap);
1651 spin_lock_irqsave(ap->lock, flags);
1653 /* We're racing with irq here. If we lose, the
1654 * following test prevents us from completing the qc
1655 * twice. If we win, the port is frozen and will be
1656 * cleaned up by ->post_internal_cmd().
1658 if (qc->flags & ATA_QCFLAG_ACTIVE) {
1659 qc->err_mask |= AC_ERR_TIMEOUT;
1661 if (ap->ops->error_handler)
1662 ata_port_freeze(ap);
1664 ata_qc_complete(qc);
1666 if (ata_msg_warn(ap))
1667 ata_dev_warn(dev, "qc timeout (cmd 0x%x)\n",
1671 spin_unlock_irqrestore(ap->lock, flags);
1674 /* do post_internal_cmd */
1675 if (ap->ops->post_internal_cmd)
1676 ap->ops->post_internal_cmd(qc);
1678 /* perform minimal error analysis */
1679 if (qc->flags & ATA_QCFLAG_FAILED) {
1680 if (qc->result_tf.command & (ATA_ERR | ATA_DF))
1681 qc->err_mask |= AC_ERR_DEV;
1684 qc->err_mask |= AC_ERR_OTHER;
1686 if (qc->err_mask & ~AC_ERR_OTHER)
1687 qc->err_mask &= ~AC_ERR_OTHER;
1691 spin_lock_irqsave(ap->lock, flags);
1693 *tf = qc->result_tf;
1694 err_mask = qc->err_mask;
1697 link->active_tag = preempted_tag;
1698 link->sactive = preempted_sactive;
1699 ap->qc_active = preempted_qc_active;
1700 ap->nr_active_links = preempted_nr_active_links;
1702 spin_unlock_irqrestore(ap->lock, flags);
1704 if ((err_mask & AC_ERR_TIMEOUT) && auto_timeout)
1705 ata_internal_cmd_timed_out(dev, command);
1711 * ata_exec_internal - execute libata internal command
1712 * @dev: Device to which the command is sent
1713 * @tf: Taskfile registers for the command and the result
1714 * @cdb: CDB for packet command
1715 * @dma_dir: Data tranfer direction of the command
1716 * @buf: Data buffer of the command
1717 * @buflen: Length of data buffer
1718 * @timeout: Timeout in msecs (0 for default)
1720 * Wrapper around ata_exec_internal_sg() which takes simple
1721 * buffer instead of sg list.
1724 * None. Should be called with kernel context, might sleep.
1727 * Zero on success, AC_ERR_* mask on failure
1729 unsigned ata_exec_internal(struct ata_device *dev,
1730 struct ata_taskfile *tf, const u8 *cdb,
1731 int dma_dir, void *buf, unsigned int buflen,
1732 unsigned long timeout)
1734 struct scatterlist *psg = NULL, sg;
1735 unsigned int n_elem = 0;
1737 if (dma_dir != DMA_NONE) {
1739 sg_init_one(&sg, buf, buflen);
1744 return ata_exec_internal_sg(dev, tf, cdb, dma_dir, psg, n_elem,
1749 * ata_do_simple_cmd - execute simple internal command
1750 * @dev: Device to which the command is sent
1751 * @cmd: Opcode to execute
1753 * Execute a 'simple' command, that only consists of the opcode
1754 * 'cmd' itself, without filling any other registers
1757 * Kernel thread context (may sleep).
1760 * Zero on success, AC_ERR_* mask on failure
1762 unsigned int ata_do_simple_cmd(struct ata_device *dev, u8 cmd)
1764 struct ata_taskfile tf;
1766 ata_tf_init(dev, &tf);
1769 tf.flags |= ATA_TFLAG_DEVICE;
1770 tf.protocol = ATA_PROT_NODATA;
1772 return ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
1776 * ata_pio_need_iordy - check if iordy needed
1779 * Check if the current speed of the device requires IORDY. Used
1780 * by various controllers for chip configuration.
1782 unsigned int ata_pio_need_iordy(const struct ata_device *adev)
1784 /* Don't set IORDY if we're preparing for reset. IORDY may
1785 * lead to controller lock up on certain controllers if the
1786 * port is not occupied. See bko#11703 for details.
1788 if (adev->link->ap->pflags & ATA_PFLAG_RESETTING)
1790 /* Controller doesn't support IORDY. Probably a pointless
1791 * check as the caller should know this.
1793 if (adev->link->ap->flags & ATA_FLAG_NO_IORDY)
1795 /* CF spec. r4.1 Table 22 says no iordy on PIO5 and PIO6. */
1796 if (ata_id_is_cfa(adev->id)
1797 && (adev->pio_mode == XFER_PIO_5 || adev->pio_mode == XFER_PIO_6))
1799 /* PIO3 and higher it is mandatory */
1800 if (adev->pio_mode > XFER_PIO_2)
1802 /* We turn it on when possible */
1803 if (ata_id_has_iordy(adev->id))
1809 * ata_pio_mask_no_iordy - Return the non IORDY mask
1812 * Compute the highest mode possible if we are not using iordy. Return
1813 * -1 if no iordy mode is available.
1815 static u32 ata_pio_mask_no_iordy(const struct ata_device *adev)
1817 /* If we have no drive specific rule, then PIO 2 is non IORDY */
1818 if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE */
1819 u16 pio = adev->id[ATA_ID_EIDE_PIO];
1820 /* Is the speed faster than the drive allows non IORDY ? */
1822 /* This is cycle times not frequency - watch the logic! */
1823 if (pio > 240) /* PIO2 is 240nS per cycle */
1824 return 3 << ATA_SHIFT_PIO;
1825 return 7 << ATA_SHIFT_PIO;
1828 return 3 << ATA_SHIFT_PIO;
1832 * ata_do_dev_read_id - default ID read method
1834 * @tf: proposed taskfile
1837 * Issue the identify taskfile and hand back the buffer containing
1838 * identify data. For some RAID controllers and for pre ATA devices
1839 * this function is wrapped or replaced by the driver
1841 unsigned int ata_do_dev_read_id(struct ata_device *dev,
1842 struct ata_taskfile *tf, u16 *id)
1844 return ata_exec_internal(dev, tf, NULL, DMA_FROM_DEVICE,
1845 id, sizeof(id[0]) * ATA_ID_WORDS, 0);
1849 * ata_dev_read_id - Read ID data from the specified device
1850 * @dev: target device
1851 * @p_class: pointer to class of the target device (may be changed)
1852 * @flags: ATA_READID_* flags
1853 * @id: buffer to read IDENTIFY data into
1855 * Read ID data from the specified device. ATA_CMD_ID_ATA is
1856 * performed on ATA devices and ATA_CMD_ID_ATAPI on ATAPI
1857 * devices. This function also issues ATA_CMD_INIT_DEV_PARAMS
1858 * for pre-ATA4 drives.
1860 * FIXME: ATA_CMD_ID_ATA is optional for early drives and right
1861 * now we abort if we hit that case.
1864 * Kernel thread context (may sleep)
1867 * 0 on success, -errno otherwise.
1869 int ata_dev_read_id(struct ata_device *dev, unsigned int *p_class,
1870 unsigned int flags, u16 *id)
1872 struct ata_port *ap = dev->link->ap;
1873 unsigned int class = *p_class;
1874 struct ata_taskfile tf;
1875 unsigned int err_mask = 0;
1877 bool is_semb = class == ATA_DEV_SEMB;
1878 int may_fallback = 1, tried_spinup = 0;
1881 if (ata_msg_ctl(ap))
1882 ata_dev_dbg(dev, "%s: ENTER\n", __func__);
1885 ata_tf_init(dev, &tf);
1889 class = ATA_DEV_ATA; /* some hard drives report SEMB sig */
1891 tf.command = ATA_CMD_ID_ATA;
1894 tf.command = ATA_CMD_ID_ATAPI;
1898 reason = "unsupported class";
1902 tf.protocol = ATA_PROT_PIO;
1904 /* Some devices choke if TF registers contain garbage. Make
1905 * sure those are properly initialized.
1907 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
1909 /* Device presence detection is unreliable on some
1910 * controllers. Always poll IDENTIFY if available.
1912 tf.flags |= ATA_TFLAG_POLLING;
1914 if (ap->ops->read_id)
1915 err_mask = ap->ops->read_id(dev, &tf, id);
1917 err_mask = ata_do_dev_read_id(dev, &tf, id);
1920 if (err_mask & AC_ERR_NODEV_HINT) {
1921 ata_dev_dbg(dev, "NODEV after polling detection\n");
1927 "IDENTIFY failed on device w/ SEMB sig, disabled\n");
1928 /* SEMB is not supported yet */
1929 *p_class = ATA_DEV_SEMB_UNSUP;
1933 if ((err_mask == AC_ERR_DEV) && (tf.feature & ATA_ABORTED)) {
1934 /* Device or controller might have reported
1935 * the wrong device class. Give a shot at the
1936 * other IDENTIFY if the current one is
1937 * aborted by the device.
1942 if (class == ATA_DEV_ATA)
1943 class = ATA_DEV_ATAPI;
1945 class = ATA_DEV_ATA;
1949 /* Control reaches here iff the device aborted
1950 * both flavors of IDENTIFYs which happens
1951 * sometimes with phantom devices.
1954 "both IDENTIFYs aborted, assuming NODEV\n");
1959 reason = "I/O error";
1963 if (dev->horkage & ATA_HORKAGE_DUMP_ID) {
1964 ata_dev_dbg(dev, "dumping IDENTIFY data, "
1965 "class=%d may_fallback=%d tried_spinup=%d\n",
1966 class, may_fallback, tried_spinup);
1967 print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET,
1968 16, 2, id, ATA_ID_WORDS * sizeof(*id), true);
1971 /* Falling back doesn't make sense if ID data was read
1972 * successfully at least once.
1976 swap_buf_le16(id, ATA_ID_WORDS);
1980 reason = "device reports invalid type";
1982 if (class == ATA_DEV_ATA) {
1983 if (!ata_id_is_ata(id) && !ata_id_is_cfa(id))
1985 if (ap->host->flags & ATA_HOST_IGNORE_ATA &&
1986 ata_id_is_ata(id)) {
1988 "host indicates ignore ATA devices, ignored\n");
1992 if (ata_id_is_ata(id))
1996 if (!tried_spinup && (id[2] == 0x37c8 || id[2] == 0x738c)) {
1999 * Drive powered-up in standby mode, and requires a specific
2000 * SET_FEATURES spin-up subcommand before it will accept
2001 * anything other than the original IDENTIFY command.
2003 err_mask = ata_dev_set_feature(dev, SETFEATURES_SPINUP, 0);
2004 if (err_mask && id[2] != 0x738c) {
2006 reason = "SPINUP failed";
2010 * If the drive initially returned incomplete IDENTIFY info,
2011 * we now must reissue the IDENTIFY command.
2013 if (id[2] == 0x37c8)
2017 if ((flags & ATA_READID_POSTRESET) && class == ATA_DEV_ATA) {
2019 * The exact sequence expected by certain pre-ATA4 drives is:
2021 * IDENTIFY (optional in early ATA)
2022 * INITIALIZE DEVICE PARAMETERS (later IDE and ATA)
2024 * Some drives were very specific about that exact sequence.
2026 * Note that ATA4 says lba is mandatory so the second check
2027 * should never trigger.
2029 if (ata_id_major_version(id) < 4 || !ata_id_has_lba(id)) {
2030 err_mask = ata_dev_init_params(dev, id[3], id[6]);
2033 reason = "INIT_DEV_PARAMS failed";
2037 /* current CHS translation info (id[53-58]) might be
2038 * changed. reread the identify device info.
2040 flags &= ~ATA_READID_POSTRESET;
2050 if (ata_msg_warn(ap))
2051 ata_dev_warn(dev, "failed to IDENTIFY (%s, err_mask=0x%x)\n",
2056 static int ata_do_link_spd_horkage(struct ata_device *dev)
2058 struct ata_link *plink = ata_dev_phys_link(dev);
2059 u32 target, target_limit;
2061 if (!sata_scr_valid(plink))
2064 if (dev->horkage & ATA_HORKAGE_1_5_GBPS)
2069 target_limit = (1 << target) - 1;
2071 /* if already on stricter limit, no need to push further */
2072 if (plink->sata_spd_limit <= target_limit)
2075 plink->sata_spd_limit = target_limit;
2077 /* Request another EH round by returning -EAGAIN if link is
2078 * going faster than the target speed. Forward progress is
2079 * guaranteed by setting sata_spd_limit to target_limit above.
2081 if (plink->sata_spd > target) {
2082 ata_dev_info(dev, "applying link speed limit horkage to %s\n",
2083 sata_spd_string(target));
2089 static inline u8 ata_dev_knobble(struct ata_device *dev)
2091 struct ata_port *ap = dev->link->ap;
2093 if (ata_dev_blacklisted(dev) & ATA_HORKAGE_BRIDGE_OK)
2096 return ((ap->cbl == ATA_CBL_SATA) && (!ata_id_is_sata(dev->id)));
2099 static int ata_dev_config_ncq(struct ata_device *dev,
2100 char *desc, size_t desc_sz)
2102 struct ata_port *ap = dev->link->ap;
2103 int hdepth = 0, ddepth = ata_id_queue_depth(dev->id);
2104 unsigned int err_mask;
2107 if (!ata_id_has_ncq(dev->id)) {
2111 if (dev->horkage & ATA_HORKAGE_NONCQ) {
2112 snprintf(desc, desc_sz, "NCQ (not used)");
2115 if (ap->flags & ATA_FLAG_NCQ) {
2116 hdepth = min(ap->scsi_host->can_queue, ATA_MAX_QUEUE - 1);
2117 dev->flags |= ATA_DFLAG_NCQ;
2120 if (!(dev->horkage & ATA_HORKAGE_BROKEN_FPDMA_AA) &&
2121 (ap->flags & ATA_FLAG_FPDMA_AA) &&
2122 ata_id_has_fpdma_aa(dev->id)) {
2123 err_mask = ata_dev_set_feature(dev, SETFEATURES_SATA_ENABLE,
2127 "failed to enable AA (error_mask=0x%x)\n",
2129 if (err_mask != AC_ERR_DEV) {
2130 dev->horkage |= ATA_HORKAGE_BROKEN_FPDMA_AA;
2137 if (hdepth >= ddepth)
2138 snprintf(desc, desc_sz, "NCQ (depth %d)%s", ddepth, aa_desc);
2140 snprintf(desc, desc_sz, "NCQ (depth %d/%d)%s", hdepth,
2146 * ata_dev_configure - Configure the specified ATA/ATAPI device
2147 * @dev: Target device to configure
2149 * Configure @dev according to @dev->id. Generic and low-level
2150 * driver specific fixups are also applied.
2153 * Kernel thread context (may sleep)
2156 * 0 on success, -errno otherwise
2158 int ata_dev_configure(struct ata_device *dev)
2160 struct ata_port *ap = dev->link->ap;
2161 struct ata_eh_context *ehc = &dev->link->eh_context;
2162 int print_info = ehc->i.flags & ATA_EHI_PRINTINFO;
2163 const u16 *id = dev->id;
2164 unsigned long xfer_mask;
2165 unsigned int err_mask;
2166 char revbuf[7]; /* XYZ-99\0 */
2167 char fwrevbuf[ATA_ID_FW_REV_LEN+1];
2168 char modelbuf[ATA_ID_PROD_LEN+1];
2171 if (!ata_dev_enabled(dev) && ata_msg_info(ap)) {
2172 ata_dev_info(dev, "%s: ENTER/EXIT -- nodev\n", __func__);
2176 if (ata_msg_probe(ap))
2177 ata_dev_dbg(dev, "%s: ENTER\n", __func__);
2180 dev->horkage |= ata_dev_blacklisted(dev);
2181 ata_force_horkage(dev);
2183 if (dev->horkage & ATA_HORKAGE_DISABLE) {
2184 ata_dev_info(dev, "unsupported device, disabling\n");
2185 ata_dev_disable(dev);
2189 if ((!atapi_enabled || (ap->flags & ATA_FLAG_NO_ATAPI)) &&
2190 dev->class == ATA_DEV_ATAPI) {
2191 ata_dev_warn(dev, "WARNING: ATAPI is %s, device ignored\n",
2192 atapi_enabled ? "not supported with this driver"
2194 ata_dev_disable(dev);
2198 rc = ata_do_link_spd_horkage(dev);
2202 /* some WD SATA-1 drives have issues with LPM, turn on NOLPM for them */
2203 if ((dev->horkage & ATA_HORKAGE_WD_BROKEN_LPM) &&
2204 (id[ATA_ID_SATA_CAPABILITY] & 0xe) == 0x2)
2205 dev->horkage |= ATA_HORKAGE_NOLPM;
2207 if (dev->horkage & ATA_HORKAGE_NOLPM) {
2208 ata_dev_warn(dev, "LPM support broken, forcing max_power\n");
2209 dev->link->ap->target_lpm_policy = ATA_LPM_MAX_POWER;
2212 /* let ACPI work its magic */
2213 rc = ata_acpi_on_devcfg(dev);
2217 /* massage HPA, do it early as it might change IDENTIFY data */
2218 rc = ata_hpa_resize(dev);
2222 /* print device capabilities */
2223 if (ata_msg_probe(ap))
2225 "%s: cfg 49:%04x 82:%04x 83:%04x 84:%04x "
2226 "85:%04x 86:%04x 87:%04x 88:%04x\n",
2228 id[49], id[82], id[83], id[84],
2229 id[85], id[86], id[87], id[88]);
2231 /* initialize to-be-configured parameters */
2232 dev->flags &= ~ATA_DFLAG_CFG_MASK;
2233 dev->max_sectors = 0;
2239 dev->multi_count = 0;
2242 * common ATA, ATAPI feature tests
2245 /* find max transfer mode; for printk only */
2246 xfer_mask = ata_id_xfermask(id);
2248 if (ata_msg_probe(ap))
2251 /* SCSI only uses 4-char revisions, dump full 8 chars from ATA */
2252 ata_id_c_string(dev->id, fwrevbuf, ATA_ID_FW_REV,
2255 ata_id_c_string(dev->id, modelbuf, ATA_ID_PROD,
2258 /* ATA-specific feature tests */
2259 if (dev->class == ATA_DEV_ATA) {
2260 if (ata_id_is_cfa(id)) {
2261 /* CPRM may make this media unusable */
2262 if (id[ATA_ID_CFA_KEY_MGMT] & 1)
2264 "supports DRM functions and may not be fully accessible\n");
2265 snprintf(revbuf, 7, "CFA");
2267 snprintf(revbuf, 7, "ATA-%d", ata_id_major_version(id));
2268 /* Warn the user if the device has TPM extensions */
2269 if (ata_id_has_tpm(id))
2271 "supports DRM functions and may not be fully accessible\n");
2274 dev->n_sectors = ata_id_n_sectors(id);
2276 /* get current R/W Multiple count setting */
2277 if ((dev->id[47] >> 8) == 0x80 && (dev->id[59] & 0x100)) {
2278 unsigned int max = dev->id[47] & 0xff;
2279 unsigned int cnt = dev->id[59] & 0xff;
2280 /* only recognize/allow powers of two here */
2281 if (is_power_of_2(max) && is_power_of_2(cnt))
2283 dev->multi_count = cnt;
2286 if (ata_id_has_lba(id)) {
2287 const char *lba_desc;
2291 dev->flags |= ATA_DFLAG_LBA;
2292 if (ata_id_has_lba48(id)) {
2293 dev->flags |= ATA_DFLAG_LBA48;
2296 if (dev->n_sectors >= (1UL << 28) &&
2297 ata_id_has_flush_ext(id))
2298 dev->flags |= ATA_DFLAG_FLUSH_EXT;
2302 rc = ata_dev_config_ncq(dev, ncq_desc, sizeof(ncq_desc));
2306 /* print device info to dmesg */
2307 if (ata_msg_drv(ap) && print_info) {
2308 ata_dev_info(dev, "%s: %s, %s, max %s\n",
2309 revbuf, modelbuf, fwrevbuf,
2310 ata_mode_string(xfer_mask));
2312 "%llu sectors, multi %u: %s %s\n",
2313 (unsigned long long)dev->n_sectors,
2314 dev->multi_count, lba_desc, ncq_desc);
2319 /* Default translation */
2320 dev->cylinders = id[1];
2322 dev->sectors = id[6];
2324 if (ata_id_current_chs_valid(id)) {
2325 /* Current CHS translation is valid. */
2326 dev->cylinders = id[54];
2327 dev->heads = id[55];
2328 dev->sectors = id[56];
2331 /* print device info to dmesg */
2332 if (ata_msg_drv(ap) && print_info) {
2333 ata_dev_info(dev, "%s: %s, %s, max %s\n",
2334 revbuf, modelbuf, fwrevbuf,
2335 ata_mode_string(xfer_mask));
2337 "%llu sectors, multi %u, CHS %u/%u/%u\n",
2338 (unsigned long long)dev->n_sectors,
2339 dev->multi_count, dev->cylinders,
2340 dev->heads, dev->sectors);
2344 /* Check and mark DevSlp capability. Get DevSlp timing variables
2345 * from SATA Settings page of Identify Device Data Log.
2347 if (ata_id_has_devslp(dev->id)) {
2348 u8 *sata_setting = ap->sector_buf;
2351 dev->flags |= ATA_DFLAG_DEVSLP;
2352 err_mask = ata_read_log_page(dev,
2353 ATA_LOG_SATA_ID_DEV_DATA,
2354 ATA_LOG_SATA_SETTINGS,
2359 "failed to get Identify Device Data, Emask 0x%x\n",
2362 for (i = 0; i < ATA_LOG_DEVSLP_SIZE; i++) {
2363 j = ATA_LOG_DEVSLP_OFFSET + i;
2364 dev->devslp_timing[i] = sata_setting[j];
2371 /* ATAPI-specific feature tests */
2372 else if (dev->class == ATA_DEV_ATAPI) {
2373 const char *cdb_intr_string = "";
2374 const char *atapi_an_string = "";
2375 const char *dma_dir_string = "";
2378 rc = atapi_cdb_len(id);
2379 if ((rc < 12) || (rc > ATAPI_CDB_LEN)) {
2380 if (ata_msg_warn(ap))
2381 ata_dev_warn(dev, "unsupported CDB len\n");
2385 dev->cdb_len = (unsigned int) rc;
2387 /* Enable ATAPI AN if both the host and device have
2388 * the support. If PMP is attached, SNTF is required
2389 * to enable ATAPI AN to discern between PHY status
2390 * changed notifications and ATAPI ANs.
2393 (ap->flags & ATA_FLAG_AN) && ata_id_has_atapi_AN(id) &&
2394 (!sata_pmp_attached(ap) ||
2395 sata_scr_read(&ap->link, SCR_NOTIFICATION, &sntf) == 0)) {
2396 /* issue SET feature command to turn this on */
2397 err_mask = ata_dev_set_feature(dev,
2398 SETFEATURES_SATA_ENABLE, SATA_AN);
2401 "failed to enable ATAPI AN (err_mask=0x%x)\n",
2404 dev->flags |= ATA_DFLAG_AN;
2405 atapi_an_string = ", ATAPI AN";
2409 if (ata_id_cdb_intr(dev->id)) {
2410 dev->flags |= ATA_DFLAG_CDB_INTR;
2411 cdb_intr_string = ", CDB intr";
2414 if (atapi_dmadir || (dev->horkage & ATA_HORKAGE_ATAPI_DMADIR) || atapi_id_dmadir(dev->id)) {
2415 dev->flags |= ATA_DFLAG_DMADIR;
2416 dma_dir_string = ", DMADIR";
2419 if (ata_id_has_da(dev->id)) {
2420 dev->flags |= ATA_DFLAG_DA;
2424 /* print device info to dmesg */
2425 if (ata_msg_drv(ap) && print_info)
2427 "ATAPI: %s, %s, max %s%s%s%s\n",
2429 ata_mode_string(xfer_mask),
2430 cdb_intr_string, atapi_an_string,
2434 /* determine max_sectors */
2435 dev->max_sectors = ATA_MAX_SECTORS;
2436 if (dev->flags & ATA_DFLAG_LBA48)
2437 dev->max_sectors = ATA_MAX_SECTORS_LBA48;
2439 /* Limit PATA drive on SATA cable bridge transfers to udma5,
2441 if (ata_dev_knobble(dev)) {
2442 if (ata_msg_drv(ap) && print_info)
2443 ata_dev_info(dev, "applying bridge limits\n");
2444 dev->udma_mask &= ATA_UDMA5;
2445 dev->max_sectors = ATA_MAX_SECTORS;
2448 if ((dev->class == ATA_DEV_ATAPI) &&
2449 (atapi_command_packet_set(id) == TYPE_TAPE)) {
2450 dev->max_sectors = ATA_MAX_SECTORS_TAPE;
2451 dev->horkage |= ATA_HORKAGE_STUCK_ERR;
2454 if (dev->horkage & ATA_HORKAGE_MAX_SEC_128)
2455 dev->max_sectors = min_t(unsigned int, ATA_MAX_SECTORS_128,
2458 if (dev->horkage & ATA_HORKAGE_MAX_SEC_LBA48)
2459 dev->max_sectors = ATA_MAX_SECTORS_LBA48;
2461 if (ap->ops->dev_config)
2462 ap->ops->dev_config(dev);
2464 if (dev->horkage & ATA_HORKAGE_DIAGNOSTIC) {
2465 /* Let the user know. We don't want to disallow opens for
2466 rescue purposes, or in case the vendor is just a blithering
2467 idiot. Do this after the dev_config call as some controllers
2468 with buggy firmware may want to avoid reporting false device
2473 "Drive reports diagnostics failure. This may indicate a drive\n");
2475 "fault or invalid emulation. Contact drive vendor for information.\n");
2479 if ((dev->horkage & ATA_HORKAGE_FIRMWARE_WARN) && print_info) {
2480 ata_dev_warn(dev, "WARNING: device requires firmware update to be fully functional\n");
2481 ata_dev_warn(dev, " contact the vendor or visit http://ata.wiki.kernel.org\n");
2487 if (ata_msg_probe(ap))
2488 ata_dev_dbg(dev, "%s: EXIT, err\n", __func__);
2493 * ata_cable_40wire - return 40 wire cable type
2496 * Helper method for drivers which want to hardwire 40 wire cable
2500 int ata_cable_40wire(struct ata_port *ap)
2502 return ATA_CBL_PATA40;
2506 * ata_cable_80wire - return 80 wire cable type
2509 * Helper method for drivers which want to hardwire 80 wire cable
2513 int ata_cable_80wire(struct ata_port *ap)
2515 return ATA_CBL_PATA80;
2519 * ata_cable_unknown - return unknown PATA cable.
2522 * Helper method for drivers which have no PATA cable detection.
2525 int ata_cable_unknown(struct ata_port *ap)
2527 return ATA_CBL_PATA_UNK;
2531 * ata_cable_ignore - return ignored PATA cable.
2534 * Helper method for drivers which don't use cable type to limit
2537 int ata_cable_ignore(struct ata_port *ap)
2539 return ATA_CBL_PATA_IGN;
2543 * ata_cable_sata - return SATA cable type
2546 * Helper method for drivers which have SATA cables
2549 int ata_cable_sata(struct ata_port *ap)
2551 return ATA_CBL_SATA;
2555 * ata_bus_probe - Reset and probe ATA bus
2558 * Master ATA bus probing function. Initiates a hardware-dependent
2559 * bus reset, then attempts to identify any devices found on
2563 * PCI/etc. bus probe sem.
2566 * Zero on success, negative errno otherwise.
2569 int ata_bus_probe(struct ata_port *ap)
2571 unsigned int classes[ATA_MAX_DEVICES];
2572 int tries[ATA_MAX_DEVICES];
2574 struct ata_device *dev;
2576 ata_for_each_dev(dev, &ap->link, ALL)
2577 tries[dev->devno] = ATA_PROBE_MAX_TRIES;
2580 ata_for_each_dev(dev, &ap->link, ALL) {
2581 /* If we issue an SRST then an ATA drive (not ATAPI)
2582 * may change configuration and be in PIO0 timing. If
2583 * we do a hard reset (or are coming from power on)
2584 * this is true for ATA or ATAPI. Until we've set a
2585 * suitable controller mode we should not touch the
2586 * bus as we may be talking too fast.
2588 dev->pio_mode = XFER_PIO_0;
2589 dev->dma_mode = 0xff;
2591 /* If the controller has a pio mode setup function
2592 * then use it to set the chipset to rights. Don't
2593 * touch the DMA setup as that will be dealt with when
2594 * configuring devices.
2596 if (ap->ops->set_piomode)
2597 ap->ops->set_piomode(ap, dev);
2600 /* reset and determine device classes */
2601 ap->ops->phy_reset(ap);
2603 ata_for_each_dev(dev, &ap->link, ALL) {
2604 if (dev->class != ATA_DEV_UNKNOWN)
2605 classes[dev->devno] = dev->class;
2607 classes[dev->devno] = ATA_DEV_NONE;
2609 dev->class = ATA_DEV_UNKNOWN;
2612 /* read IDENTIFY page and configure devices. We have to do the identify
2613 specific sequence bass-ackwards so that PDIAG- is released by
2616 ata_for_each_dev(dev, &ap->link, ALL_REVERSE) {
2617 if (tries[dev->devno])
2618 dev->class = classes[dev->devno];
2620 if (!ata_dev_enabled(dev))
2623 rc = ata_dev_read_id(dev, &dev->class, ATA_READID_POSTRESET,
2629 /* Now ask for the cable type as PDIAG- should have been released */
2630 if (ap->ops->cable_detect)
2631 ap->cbl = ap->ops->cable_detect(ap);
2633 /* We may have SATA bridge glue hiding here irrespective of
2634 * the reported cable types and sensed types. When SATA
2635 * drives indicate we have a bridge, we don't know which end
2636 * of the link the bridge is which is a problem.
2638 ata_for_each_dev(dev, &ap->link, ENABLED)
2639 if (ata_id_is_sata(dev->id))
2640 ap->cbl = ATA_CBL_SATA;
2642 /* After the identify sequence we can now set up the devices. We do
2643 this in the normal order so that the user doesn't get confused */
2645 ata_for_each_dev(dev, &ap->link, ENABLED) {
2646 ap->link.eh_context.i.flags |= ATA_EHI_PRINTINFO;
2647 rc = ata_dev_configure(dev);
2648 ap->link.eh_context.i.flags &= ~ATA_EHI_PRINTINFO;
2653 /* configure transfer mode */
2654 rc = ata_set_mode(&ap->link, &dev);
2658 ata_for_each_dev(dev, &ap->link, ENABLED)
2664 tries[dev->devno]--;
2668 /* eeek, something went very wrong, give up */
2669 tries[dev->devno] = 0;
2673 /* give it just one more chance */
2674 tries[dev->devno] = min(tries[dev->devno], 1);
2676 if (tries[dev->devno] == 1) {
2677 /* This is the last chance, better to slow
2678 * down than lose it.
2680 sata_down_spd_limit(&ap->link, 0);
2681 ata_down_xfermask_limit(dev, ATA_DNXFER_PIO);
2685 if (!tries[dev->devno])
2686 ata_dev_disable(dev);
2692 * sata_print_link_status - Print SATA link status
2693 * @link: SATA link to printk link status about
2695 * This function prints link speed and status of a SATA link.
2700 static void sata_print_link_status(struct ata_link *link)
2702 u32 sstatus, scontrol, tmp;
2704 if (sata_scr_read(link, SCR_STATUS, &sstatus))
2706 sata_scr_read(link, SCR_CONTROL, &scontrol);
2708 if (ata_phys_link_online(link)) {
2709 tmp = (sstatus >> 4) & 0xf;
2710 ata_link_info(link, "SATA link up %s (SStatus %X SControl %X)\n",
2711 sata_spd_string(tmp), sstatus, scontrol);
2713 ata_link_info(link, "SATA link down (SStatus %X SControl %X)\n",
2719 * ata_dev_pair - return other device on cable
2722 * Obtain the other device on the same cable, or if none is
2723 * present NULL is returned
2726 struct ata_device *ata_dev_pair(struct ata_device *adev)
2728 struct ata_link *link = adev->link;
2729 struct ata_device *pair = &link->device[1 - adev->devno];
2730 if (!ata_dev_enabled(pair))
2736 * sata_down_spd_limit - adjust SATA spd limit downward
2737 * @link: Link to adjust SATA spd limit for
2738 * @spd_limit: Additional limit
2740 * Adjust SATA spd limit of @link downward. Note that this
2741 * function only adjusts the limit. The change must be applied
2742 * using sata_set_spd().
2744 * If @spd_limit is non-zero, the speed is limited to equal to or
2745 * lower than @spd_limit if such speed is supported. If
2746 * @spd_limit is slower than any supported speed, only the lowest
2747 * supported speed is allowed.
2750 * Inherited from caller.
2753 * 0 on success, negative errno on failure
2755 int sata_down_spd_limit(struct ata_link *link, u32 spd_limit)
2757 u32 sstatus, spd, mask;
2760 if (!sata_scr_valid(link))
2763 /* If SCR can be read, use it to determine the current SPD.
2764 * If not, use cached value in link->sata_spd.
2766 rc = sata_scr_read(link, SCR_STATUS, &sstatus);
2767 if (rc == 0 && ata_sstatus_online(sstatus))
2768 spd = (sstatus >> 4) & 0xf;
2770 spd = link->sata_spd;
2772 mask = link->sata_spd_limit;
2776 /* unconditionally mask off the highest bit */
2777 bit = fls(mask) - 1;
2778 mask &= ~(1 << bit);
2780 /* Mask off all speeds higher than or equal to the current
2781 * one. Force 1.5Gbps if current SPD is not available.
2784 mask &= (1 << (spd - 1)) - 1;
2788 /* were we already at the bottom? */
2793 if (mask & ((1 << spd_limit) - 1))
2794 mask &= (1 << spd_limit) - 1;
2796 bit = ffs(mask) - 1;
2801 link->sata_spd_limit = mask;
2803 ata_link_warn(link, "limiting SATA link speed to %s\n",
2804 sata_spd_string(fls(mask)));
2809 static int __sata_set_spd_needed(struct ata_link *link, u32 *scontrol)
2811 struct ata_link *host_link = &link->ap->link;
2812 u32 limit, target, spd;
2814 limit = link->sata_spd_limit;
2816 /* Don't configure downstream link faster than upstream link.
2817 * It doesn't speed up anything and some PMPs choke on such
2820 if (!ata_is_host_link(link) && host_link->sata_spd)
2821 limit &= (1 << host_link->sata_spd) - 1;
2823 if (limit == UINT_MAX)
2826 target = fls(limit);
2828 spd = (*scontrol >> 4) & 0xf;
2829 *scontrol = (*scontrol & ~0xf0) | ((target & 0xf) << 4);
2831 return spd != target;
2835 * sata_set_spd_needed - is SATA spd configuration needed
2836 * @link: Link in question
2838 * Test whether the spd limit in SControl matches
2839 * @link->sata_spd_limit. This function is used to determine
2840 * whether hardreset is necessary to apply SATA spd
2844 * Inherited from caller.
2847 * 1 if SATA spd configuration is needed, 0 otherwise.
2849 static int sata_set_spd_needed(struct ata_link *link)
2853 if (sata_scr_read(link, SCR_CONTROL, &scontrol))
2856 return __sata_set_spd_needed(link, &scontrol);
2860 * sata_set_spd - set SATA spd according to spd limit
2861 * @link: Link to set SATA spd for
2863 * Set SATA spd of @link according to sata_spd_limit.
2866 * Inherited from caller.
2869 * 0 if spd doesn't need to be changed, 1 if spd has been
2870 * changed. Negative errno if SCR registers are inaccessible.
2872 int sata_set_spd(struct ata_link *link)
2877 if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
2880 if (!__sata_set_spd_needed(link, &scontrol))
2883 if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol)))
2890 * This mode timing computation functionality is ported over from
2891 * drivers/ide/ide-timing.h and was originally written by Vojtech Pavlik
2894 * PIO 0-4, MWDMA 0-2 and UDMA 0-6 timings (in nanoseconds).
2895 * These were taken from ATA/ATAPI-6 standard, rev 0a, except
2896 * for UDMA6, which is currently supported only by Maxtor drives.
2898 * For PIO 5/6 MWDMA 3/4 see the CFA specification 3.0.
2901 static const struct ata_timing ata_timing[] = {
2902 /* { XFER_PIO_SLOW, 120, 290, 240, 960, 290, 240, 0, 960, 0 }, */
2903 { XFER_PIO_0, 70, 290, 240, 600, 165, 150, 0, 600, 0 },
2904 { XFER_PIO_1, 50, 290, 93, 383, 125, 100, 0, 383, 0 },
2905 { XFER_PIO_2, 30, 290, 40, 330, 100, 90, 0, 240, 0 },
2906 { XFER_PIO_3, 30, 80, 70, 180, 80, 70, 0, 180, 0 },
2907 { XFER_PIO_4, 25, 70, 25, 120, 70, 25, 0, 120, 0 },
2908 { XFER_PIO_5, 15, 65, 25, 100, 65, 25, 0, 100, 0 },
2909 { XFER_PIO_6, 10, 55, 20, 80, 55, 20, 0, 80, 0 },
2911 { XFER_SW_DMA_0, 120, 0, 0, 0, 480, 480, 50, 960, 0 },
2912 { XFER_SW_DMA_1, 90, 0, 0, 0, 240, 240, 30, 480, 0 },
2913 { XFER_SW_DMA_2, 60, 0, 0, 0, 120, 120, 20, 240, 0 },
2915 { XFER_MW_DMA_0, 60, 0, 0, 0, 215, 215, 20, 480, 0 },
2916 { XFER_MW_DMA_1, 45, 0, 0, 0, 80, 50, 5, 150, 0 },
2917 { XFER_MW_DMA_2, 25, 0, 0, 0, 70, 25, 5, 120, 0 },
2918 { XFER_MW_DMA_3, 25, 0, 0, 0, 65, 25, 5, 100, 0 },
2919 { XFER_MW_DMA_4, 25, 0, 0, 0, 55, 20, 5, 80, 0 },
2921 /* { XFER_UDMA_SLOW, 0, 0, 0, 0, 0, 0, 0, 0, 150 }, */
2922 { XFER_UDMA_0, 0, 0, 0, 0, 0, 0, 0, 0, 120 },
2923 { XFER_UDMA_1, 0, 0, 0, 0, 0, 0, 0, 0, 80 },
2924 { XFER_UDMA_2, 0, 0, 0, 0, 0, 0, 0, 0, 60 },
2925 { XFER_UDMA_3, 0, 0, 0, 0, 0, 0, 0, 0, 45 },
2926 { XFER_UDMA_4, 0, 0, 0, 0, 0, 0, 0, 0, 30 },
2927 { XFER_UDMA_5, 0, 0, 0, 0, 0, 0, 0, 0, 20 },
2928 { XFER_UDMA_6, 0, 0, 0, 0, 0, 0, 0, 0, 15 },
2933 #define ENOUGH(v, unit) (((v)-1)/(unit)+1)
2934 #define EZ(v, unit) ((v)?ENOUGH(v, unit):0)
2936 static void ata_timing_quantize(const struct ata_timing *t, struct ata_timing *q, int T, int UT)
2938 q->setup = EZ(t->setup * 1000, T);
2939 q->act8b = EZ(t->act8b * 1000, T);
2940 q->rec8b = EZ(t->rec8b * 1000, T);
2941 q->cyc8b = EZ(t->cyc8b * 1000, T);
2942 q->active = EZ(t->active * 1000, T);
2943 q->recover = EZ(t->recover * 1000, T);
2944 q->dmack_hold = EZ(t->dmack_hold * 1000, T);
2945 q->cycle = EZ(t->cycle * 1000, T);
2946 q->udma = EZ(t->udma * 1000, UT);
2949 void ata_timing_merge(const struct ata_timing *a, const struct ata_timing *b,
2950 struct ata_timing *m, unsigned int what)
2952 if (what & ATA_TIMING_SETUP ) m->setup = max(a->setup, b->setup);
2953 if (what & ATA_TIMING_ACT8B ) m->act8b = max(a->act8b, b->act8b);
2954 if (what & ATA_TIMING_REC8B ) m->rec8b = max(a->rec8b, b->rec8b);
2955 if (what & ATA_TIMING_CYC8B ) m->cyc8b = max(a->cyc8b, b->cyc8b);
2956 if (what & ATA_TIMING_ACTIVE ) m->active = max(a->active, b->active);
2957 if (what & ATA_TIMING_RECOVER) m->recover = max(a->recover, b->recover);
2958 if (what & ATA_TIMING_DMACK_HOLD) m->dmack_hold = max(a->dmack_hold, b->dmack_hold);
2959 if (what & ATA_TIMING_CYCLE ) m->cycle = max(a->cycle, b->cycle);
2960 if (what & ATA_TIMING_UDMA ) m->udma = max(a->udma, b->udma);
2963 const struct ata_timing *ata_timing_find_mode(u8 xfer_mode)
2965 const struct ata_timing *t = ata_timing;
2967 while (xfer_mode > t->mode)
2970 if (xfer_mode == t->mode)
2973 WARN_ONCE(true, "%s: unable to find timing for xfer_mode 0x%x\n",
2974 __func__, xfer_mode);
2979 int ata_timing_compute(struct ata_device *adev, unsigned short speed,
2980 struct ata_timing *t, int T, int UT)
2982 const u16 *id = adev->id;
2983 const struct ata_timing *s;
2984 struct ata_timing p;
2990 if (!(s = ata_timing_find_mode(speed)))
2993 memcpy(t, s, sizeof(*s));
2996 * If the drive is an EIDE drive, it can tell us it needs extended
2997 * PIO/MW_DMA cycle timing.
3000 if (id[ATA_ID_FIELD_VALID] & 2) { /* EIDE drive */
3001 memset(&p, 0, sizeof(p));
3003 if (speed >= XFER_PIO_0 && speed < XFER_SW_DMA_0) {
3004 if (speed <= XFER_PIO_2)
3005 p.cycle = p.cyc8b = id[ATA_ID_EIDE_PIO];
3006 else if ((speed <= XFER_PIO_4) ||
3007 (speed == XFER_PIO_5 && !ata_id_is_cfa(id)))
3008 p.cycle = p.cyc8b = id[ATA_ID_EIDE_PIO_IORDY];
3009 } else if (speed >= XFER_MW_DMA_0 && speed <= XFER_MW_DMA_2)
3010 p.cycle = id[ATA_ID_EIDE_DMA_MIN];
3012 ata_timing_merge(&p, t, t, ATA_TIMING_CYCLE | ATA_TIMING_CYC8B);
3016 * Convert the timing to bus clock counts.
3019 ata_timing_quantize(t, t, T, UT);
3022 * Even in DMA/UDMA modes we still use PIO access for IDENTIFY,
3023 * S.M.A.R.T * and some other commands. We have to ensure that the
3024 * DMA cycle timing is slower/equal than the fastest PIO timing.
3027 if (speed > XFER_PIO_6) {
3028 ata_timing_compute(adev, adev->pio_mode, &p, T, UT);
3029 ata_timing_merge(&p, t, t, ATA_TIMING_ALL);
3033 * Lengthen active & recovery time so that cycle time is correct.
3036 if (t->act8b + t->rec8b < t->cyc8b) {
3037 t->act8b += (t->cyc8b - (t->act8b + t->rec8b)) / 2;
3038 t->rec8b = t->cyc8b - t->act8b;
3041 if (t->active + t->recover < t->cycle) {
3042 t->active += (t->cycle - (t->active + t->recover)) / 2;
3043 t->recover = t->cycle - t->active;
3046 /* In a few cases quantisation may produce enough errors to
3047 leave t->cycle too low for the sum of active and recovery
3048 if so we must correct this */
3049 if (t->active + t->recover > t->cycle)
3050 t->cycle = t->active + t->recover;
3056 * ata_timing_cycle2mode - find xfer mode for the specified cycle duration
3057 * @xfer_shift: ATA_SHIFT_* value for transfer type to examine.
3058 * @cycle: cycle duration in ns
3060 * Return matching xfer mode for @cycle. The returned mode is of
3061 * the transfer type specified by @xfer_shift. If @cycle is too
3062 * slow for @xfer_shift, 0xff is returned. If @cycle is faster
3063 * than the fastest known mode, the fasted mode is returned.
3069 * Matching xfer_mode, 0xff if no match found.
3071 u8 ata_timing_cycle2mode(unsigned int xfer_shift, int cycle)
3073 u8 base_mode = 0xff, last_mode = 0xff;
3074 const struct ata_xfer_ent *ent;
3075 const struct ata_timing *t;
3077 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
3078 if (ent->shift == xfer_shift)
3079 base_mode = ent->base;
3081 for (t = ata_timing_find_mode(base_mode);
3082 t && ata_xfer_mode2shift(t->mode) == xfer_shift; t++) {
3083 unsigned short this_cycle;
3085 switch (xfer_shift) {
3087 case ATA_SHIFT_MWDMA:
3088 this_cycle = t->cycle;
3090 case ATA_SHIFT_UDMA:
3091 this_cycle = t->udma;
3097 if (cycle > this_cycle)
3100 last_mode = t->mode;
3107 * ata_down_xfermask_limit - adjust dev xfer masks downward
3108 * @dev: Device to adjust xfer masks
3109 * @sel: ATA_DNXFER_* selector
3111 * Adjust xfer masks of @dev downward. Note that this function
3112 * does not apply the change. Invoking ata_set_mode() afterwards
3113 * will apply the limit.
3116 * Inherited from caller.
3119 * 0 on success, negative errno on failure
3121 int ata_down_xfermask_limit(struct ata_device *dev, unsigned int sel)
3124 unsigned long orig_mask, xfer_mask;
3125 unsigned long pio_mask, mwdma_mask, udma_mask;
3128 quiet = !!(sel & ATA_DNXFER_QUIET);
3129 sel &= ~ATA_DNXFER_QUIET;
3131 xfer_mask = orig_mask = ata_pack_xfermask(dev->pio_mask,
3134 ata_unpack_xfermask(xfer_mask, &pio_mask, &mwdma_mask, &udma_mask);
3137 case ATA_DNXFER_PIO:
3138 highbit = fls(pio_mask) - 1;
3139 pio_mask &= ~(1 << highbit);
3142 case ATA_DNXFER_DMA:
3144 highbit = fls(udma_mask) - 1;
3145 udma_mask &= ~(1 << highbit);
3148 } else if (mwdma_mask) {
3149 highbit = fls(mwdma_mask) - 1;
3150 mwdma_mask &= ~(1 << highbit);
3156 case ATA_DNXFER_40C:
3157 udma_mask &= ATA_UDMA_MASK_40C;
3160 case ATA_DNXFER_FORCE_PIO0:
3162 case ATA_DNXFER_FORCE_PIO:
3171 xfer_mask &= ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask);
3173 if (!(xfer_mask & ATA_MASK_PIO) || xfer_mask == orig_mask)
3177 if (xfer_mask & (ATA_MASK_MWDMA | ATA_MASK_UDMA))
3178 snprintf(buf, sizeof(buf), "%s:%s",
3179 ata_mode_string(xfer_mask),
3180 ata_mode_string(xfer_mask & ATA_MASK_PIO));
3182 snprintf(buf, sizeof(buf), "%s",
3183 ata_mode_string(xfer_mask));
3185 ata_dev_warn(dev, "limiting speed to %s\n", buf);
3188 ata_unpack_xfermask(xfer_mask, &dev->pio_mask, &dev->mwdma_mask,
3194 static int ata_dev_set_mode(struct ata_device *dev)
3196 struct ata_port *ap = dev->link->ap;
3197 struct ata_eh_context *ehc = &dev->link->eh_context;
3198 const bool nosetxfer = dev->horkage & ATA_HORKAGE_NOSETXFER;
3199 const char *dev_err_whine = "";
3200 int ign_dev_err = 0;
3201 unsigned int err_mask = 0;
3204 dev->flags &= ~ATA_DFLAG_PIO;
3205 if (dev->xfer_shift == ATA_SHIFT_PIO)
3206 dev->flags |= ATA_DFLAG_PIO;
3208 if (nosetxfer && ap->flags & ATA_FLAG_SATA && ata_id_is_sata(dev->id))
3209 dev_err_whine = " (SET_XFERMODE skipped)";
3213 "NOSETXFER but PATA detected - can't "
3214 "skip SETXFER, might malfunction\n");
3215 err_mask = ata_dev_set_xfermode(dev);
3218 if (err_mask & ~AC_ERR_DEV)
3222 ehc->i.flags |= ATA_EHI_POST_SETMODE;
3223 rc = ata_dev_revalidate(dev, ATA_DEV_UNKNOWN, 0);
3224 ehc->i.flags &= ~ATA_EHI_POST_SETMODE;
3228 if (dev->xfer_shift == ATA_SHIFT_PIO) {
3229 /* Old CFA may refuse this command, which is just fine */
3230 if (ata_id_is_cfa(dev->id))
3232 /* Catch several broken garbage emulations plus some pre
3234 if (ata_id_major_version(dev->id) == 0 &&
3235 dev->pio_mode <= XFER_PIO_2)
3237 /* Some very old devices and some bad newer ones fail
3238 any kind of SET_XFERMODE request but support PIO0-2
3239 timings and no IORDY */
3240 if (!ata_id_has_iordy(dev->id) && dev->pio_mode <= XFER_PIO_2)
3243 /* Early MWDMA devices do DMA but don't allow DMA mode setting.
3244 Don't fail an MWDMA0 set IFF the device indicates it is in MWDMA0 */
3245 if (dev->xfer_shift == ATA_SHIFT_MWDMA &&
3246 dev->dma_mode == XFER_MW_DMA_0 &&
3247 (dev->id[63] >> 8) & 1)
3250 /* if the device is actually configured correctly, ignore dev err */
3251 if (dev->xfer_mode == ata_xfer_mask2mode(ata_id_xfermask(dev->id)))
3254 if (err_mask & AC_ERR_DEV) {
3258 dev_err_whine = " (device error ignored)";
3261 DPRINTK("xfer_shift=%u, xfer_mode=0x%x\n",
3262 dev->xfer_shift, (int)dev->xfer_mode);
3264 ata_dev_info(dev, "configured for %s%s\n",
3265 ata_mode_string(ata_xfer_mode2mask(dev->xfer_mode)),
3271 ata_dev_err(dev, "failed to set xfermode (err_mask=0x%x)\n", err_mask);
3276 * ata_do_set_mode - Program timings and issue SET FEATURES - XFER
3277 * @link: link on which timings will be programmed
3278 * @r_failed_dev: out parameter for failed device
3280 * Standard implementation of the function used to tune and set
3281 * ATA device disk transfer mode (PIO3, UDMA6, etc.). If
3282 * ata_dev_set_mode() fails, pointer to the failing device is
3283 * returned in @r_failed_dev.
3286 * PCI/etc. bus probe sem.
3289 * 0 on success, negative errno otherwise
3292 int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev)
3294 struct ata_port *ap = link->ap;
3295 struct ata_device *dev;
3296 int rc = 0, used_dma = 0, found = 0;
3298 /* step 1: calculate xfer_mask */
3299 ata_for_each_dev(dev, link, ENABLED) {
3300 unsigned long pio_mask, dma_mask;
3301 unsigned int mode_mask;
3303 mode_mask = ATA_DMA_MASK_ATA;
3304 if (dev->class == ATA_DEV_ATAPI)
3305 mode_mask = ATA_DMA_MASK_ATAPI;
3306 else if (ata_id_is_cfa(dev->id))
3307 mode_mask = ATA_DMA_MASK_CFA;
3309 ata_dev_xfermask(dev);
3310 ata_force_xfermask(dev);
3312 pio_mask = ata_pack_xfermask(dev->pio_mask, 0, 0);
3314 if (libata_dma_mask & mode_mask)
3315 dma_mask = ata_pack_xfermask(0, dev->mwdma_mask,
3320 dev->pio_mode = ata_xfer_mask2mode(pio_mask);
3321 dev->dma_mode = ata_xfer_mask2mode(dma_mask);
3324 if (ata_dma_enabled(dev))
3330 /* step 2: always set host PIO timings */
3331 ata_for_each_dev(dev, link, ENABLED) {
3332 if (dev->pio_mode == 0xff) {
3333 ata_dev_warn(dev, "no PIO support\n");
3338 dev->xfer_mode = dev->pio_mode;
3339 dev->xfer_shift = ATA_SHIFT_PIO;
3340 if (ap->ops->set_piomode)
3341 ap->ops->set_piomode(ap, dev);
3344 /* step 3: set host DMA timings */
3345 ata_for_each_dev(dev, link, ENABLED) {
3346 if (!ata_dma_enabled(dev))
3349 dev->xfer_mode = dev->dma_mode;
3350 dev->xfer_shift = ata_xfer_mode2shift(dev->dma_mode);
3351 if (ap->ops->set_dmamode)
3352 ap->ops->set_dmamode(ap, dev);
3355 /* step 4: update devices' xfer mode */
3356 ata_for_each_dev(dev, link, ENABLED) {
3357 rc = ata_dev_set_mode(dev);
3362 /* Record simplex status. If we selected DMA then the other
3363 * host channels are not permitted to do so.
3365 if (used_dma && (ap->host->flags & ATA_HOST_SIMPLEX))
3366 ap->host->simplex_claimed = ap;
3370 *r_failed_dev = dev;
3375 * ata_wait_ready - wait for link to become ready
3376 * @link: link to be waited on
3377 * @deadline: deadline jiffies for the operation
3378 * @check_ready: callback to check link readiness
3380 * Wait for @link to become ready. @check_ready should return
3381 * positive number if @link is ready, 0 if it isn't, -ENODEV if
3382 * link doesn't seem to be occupied, other errno for other error
3385 * Transient -ENODEV conditions are allowed for
3386 * ATA_TMOUT_FF_WAIT.
3392 * 0 if @linke is ready before @deadline; otherwise, -errno.
3394 int ata_wait_ready(struct ata_link *link, unsigned long deadline,
3395 int (*check_ready)(struct ata_link *link))
3397 unsigned long start = jiffies;
3398 unsigned long nodev_deadline;
3401 /* choose which 0xff timeout to use, read comment in libata.h */
3402 if (link->ap->host->flags & ATA_HOST_PARALLEL_SCAN)
3403 nodev_deadline = ata_deadline(start, ATA_TMOUT_FF_WAIT_LONG);
3405 nodev_deadline = ata_deadline(start, ATA_TMOUT_FF_WAIT);
3407 /* Slave readiness can't be tested separately from master. On
3408 * M/S emulation configuration, this function should be called
3409 * only on the master and it will handle both master and slave.
3411 WARN_ON(link == link->ap->slave_link);
3413 if (time_after(nodev_deadline, deadline))
3414 nodev_deadline = deadline;
3417 unsigned long now = jiffies;
3420 ready = tmp = check_ready(link);
3425 * -ENODEV could be transient. Ignore -ENODEV if link
3426 * is online. Also, some SATA devices take a long
3427 * time to clear 0xff after reset. Wait for
3428 * ATA_TMOUT_FF_WAIT[_LONG] on -ENODEV if link isn't
3431 * Note that some PATA controllers (pata_ali) explode
3432 * if status register is read more than once when
3433 * there's no device attached.
3435 if (ready == -ENODEV) {
3436 if (ata_link_online(link))
3438 else if ((link->ap->flags & ATA_FLAG_SATA) &&
3439 !ata_link_offline(link) &&
3440 time_before(now, nodev_deadline))
3446 if (time_after(now, deadline))
3449 if (!warned && time_after(now, start + 5 * HZ) &&
3450 (deadline - now > 3 * HZ)) {
3452 "link is slow to respond, please be patient "
3453 "(ready=%d)\n", tmp);
3457 ata_msleep(link->ap, 50);
3462 * ata_wait_after_reset - wait for link to become ready after reset
3463 * @link: link to be waited on
3464 * @deadline: deadline jiffies for the operation
3465 * @check_ready: callback to check link readiness
3467 * Wait for @link to become ready after reset.
3473 * 0 if @linke is ready before @deadline; otherwise, -errno.
3475 int ata_wait_after_reset(struct ata_link *link, unsigned long deadline,
3476 int (*check_ready)(struct ata_link *link))
3478 ata_msleep(link->ap, ATA_WAIT_AFTER_RESET);
3480 return ata_wait_ready(link, deadline, check_ready);
3484 * sata_link_debounce - debounce SATA phy status
3485 * @link: ATA link to debounce SATA phy status for
3486 * @params: timing parameters { interval, duratinon, timeout } in msec
3487 * @deadline: deadline jiffies for the operation
3489 * Make sure SStatus of @link reaches stable state, determined by
3490 * holding the same value where DET is not 1 for @duration polled
3491 * every @interval, before @timeout. Timeout constraints the
3492 * beginning of the stable state. Because DET gets stuck at 1 on
3493 * some controllers after hot unplugging, this functions waits
3494 * until timeout then returns 0 if DET is stable at 1.
3496 * @timeout is further limited by @deadline. The sooner of the
3500 * Kernel thread context (may sleep)
3503 * 0 on success, -errno on failure.
3505 int sata_link_debounce(struct ata_link *link, const unsigned long *params,
3506 unsigned long deadline)
3508 unsigned long interval = params[0];
3509 unsigned long duration = params[1];
3510 unsigned long last_jiffies, t;
3514 t = ata_deadline(jiffies, params[2]);
3515 if (time_before(t, deadline))
3518 if ((rc = sata_scr_read(link, SCR_STATUS, &cur)))
3523 last_jiffies = jiffies;
3526 ata_msleep(link->ap, interval);
3527 if ((rc = sata_scr_read(link, SCR_STATUS, &cur)))
3533 if (cur == 1 && time_before(jiffies, deadline))
3535 if (time_after(jiffies,
3536 ata_deadline(last_jiffies, duration)))
3541 /* unstable, start over */
3543 last_jiffies = jiffies;
3545 /* Check deadline. If debouncing failed, return
3546 * -EPIPE to tell upper layer to lower link speed.
3548 if (time_after(jiffies, deadline))
3554 * sata_link_resume - resume SATA link
3555 * @link: ATA link to resume SATA
3556 * @params: timing parameters { interval, duratinon, timeout } in msec
3557 * @deadline: deadline jiffies for the operation
3559 * Resume SATA phy @link and debounce it.
3562 * Kernel thread context (may sleep)
3565 * 0 on success, -errno on failure.
3567 int sata_link_resume(struct ata_link *link, const unsigned long *params,
3568 unsigned long deadline)
3570 int tries = ATA_LINK_RESUME_TRIES;
3571 u32 scontrol, serror;
3574 if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
3578 * Writes to SControl sometimes get ignored under certain
3579 * controllers (ata_piix SIDPR). Make sure DET actually is
3583 scontrol = (scontrol & 0x0f0) | 0x300;
3584 if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol)))
3587 * Some PHYs react badly if SStatus is pounded
3588 * immediately after resuming. Delay 200ms before
3591 ata_msleep(link->ap, 200);
3593 /* is SControl restored correctly? */
3594 if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
3596 } while ((scontrol & 0xf0f) != 0x300 && --tries);
3598 if ((scontrol & 0xf0f) != 0x300) {
3599 ata_link_warn(link, "failed to resume link (SControl %X)\n",
3604 if (tries < ATA_LINK_RESUME_TRIES)
3605 ata_link_warn(link, "link resume succeeded after %d retries\n",
3606 ATA_LINK_RESUME_TRIES - tries);
3608 if ((rc = sata_link_debounce(link, params, deadline)))
3611 /* clear SError, some PHYs require this even for SRST to work */
3612 if (!(rc = sata_scr_read(link, SCR_ERROR, &serror)))
3613 rc = sata_scr_write(link, SCR_ERROR, serror);
3615 return rc != -EINVAL ? rc : 0;
3619 * sata_link_scr_lpm - manipulate SControl IPM and SPM fields
3620 * @link: ATA link to manipulate SControl for
3621 * @policy: LPM policy to configure
3622 * @spm_wakeup: initiate LPM transition to active state
3624 * Manipulate the IPM field of the SControl register of @link
3625 * according to @policy. If @policy is ATA_LPM_MAX_POWER and
3626 * @spm_wakeup is %true, the SPM field is manipulated to wake up
3627 * the link. This function also clears PHYRDY_CHG before
3634 * 0 on succes, -errno otherwise.
3636 int sata_link_scr_lpm(struct ata_link *link, enum ata_lpm_policy policy,
3639 struct ata_eh_context *ehc = &link->eh_context;
3640 bool woken_up = false;
3644 rc = sata_scr_read(link, SCR_CONTROL, &scontrol);
3649 case ATA_LPM_MAX_POWER:
3650 /* disable all LPM transitions */
3651 scontrol |= (0x7 << 8);
3652 /* initiate transition to active state */
3654 scontrol |= (0x4 << 12);
3658 case ATA_LPM_MED_POWER:
3659 /* allow LPM to PARTIAL */
3660 scontrol &= ~(0x1 << 8);
3661 scontrol |= (0x6 << 8);
3663 case ATA_LPM_MIN_POWER:
3664 if (ata_link_nr_enabled(link) > 0)
3665 /* no restrictions on LPM transitions */
3666 scontrol &= ~(0x7 << 8);
3668 /* empty port, power off */
3670 scontrol |= (0x1 << 2);
3677 rc = sata_scr_write(link, SCR_CONTROL, scontrol);
3681 /* give the link time to transit out of LPM state */
3685 /* clear PHYRDY_CHG from SError */
3686 ehc->i.serror &= ~SERR_PHYRDY_CHG;
3687 return sata_scr_write(link, SCR_ERROR, SERR_PHYRDY_CHG);
3691 * ata_std_prereset - prepare for reset
3692 * @link: ATA link to be reset
3693 * @deadline: deadline jiffies for the operation
3695 * @link is about to be reset. Initialize it. Failure from
3696 * prereset makes libata abort whole reset sequence and give up
3697 * that port, so prereset should be best-effort. It does its
3698 * best to prepare for reset sequence but if things go wrong, it
3699 * should just whine, not fail.
3702 * Kernel thread context (may sleep)
3705 * 0 on success, -errno otherwise.
3707 int ata_std_prereset(struct ata_link *link, unsigned long deadline)
3709 struct ata_port *ap = link->ap;
3710 struct ata_eh_context *ehc = &link->eh_context;
3711 const unsigned long *timing = sata_ehc_deb_timing(ehc);
3714 /* if we're about to do hardreset, nothing more to do */
3715 if (ehc->i.action & ATA_EH_HARDRESET)
3718 /* if SATA, resume link */
3719 if (ap->flags & ATA_FLAG_SATA) {
3720 rc = sata_link_resume(link, timing, deadline);
3721 /* whine about phy resume failure but proceed */
3722 if (rc && rc != -EOPNOTSUPP)
3724 "failed to resume link for reset (errno=%d)\n",
3728 /* no point in trying softreset on offline link */
3729 if (ata_phys_link_offline(link))
3730 ehc->i.action &= ~ATA_EH_SOFTRESET;
3736 * sata_link_hardreset - reset link via SATA phy reset
3737 * @link: link to reset
3738 * @timing: timing parameters { interval, duratinon, timeout } in msec
3739 * @deadline: deadline jiffies for the operation
3740 * @online: optional out parameter indicating link onlineness
3741 * @check_ready: optional callback to check link readiness
3743 * SATA phy-reset @link using DET bits of SControl register.
3744 * After hardreset, link readiness is waited upon using
3745 * ata_wait_ready() if @check_ready is specified. LLDs are
3746 * allowed to not specify @check_ready and wait itself after this
3747 * function returns. Device classification is LLD's
3750 * *@online is set to one iff reset succeeded and @link is online
3754 * Kernel thread context (may sleep)
3757 * 0 on success, -errno otherwise.
3759 int sata_link_hardreset(struct ata_link *link, const unsigned long *timing,
3760 unsigned long deadline,
3761 bool *online, int (*check_ready)(struct ata_link *))
3771 if (sata_set_spd_needed(link)) {
3772 /* SATA spec says nothing about how to reconfigure
3773 * spd. To be on the safe side, turn off phy during
3774 * reconfiguration. This works for at least ICH7 AHCI
3777 if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
3780 scontrol = (scontrol & 0x0f0) | 0x304;
3782 if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol)))
3788 /* issue phy wake/reset */
3789 if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
3792 scontrol = (scontrol & 0x0f0) | 0x301;
3794 if ((rc = sata_scr_write_flush(link, SCR_CONTROL, scontrol)))
3797 /* Couldn't find anything in SATA I/II specs, but AHCI-1.1
3798 * 10.4.2 says at least 1 ms.
3800 ata_msleep(link->ap, 1);
3802 /* bring link back */
3803 rc = sata_link_resume(link, timing, deadline);
3806 /* if link is offline nothing more to do */
3807 if (ata_phys_link_offline(link))
3810 /* Link is online. From this point, -ENODEV too is an error. */
3814 if (sata_pmp_supported(link->ap) && ata_is_host_link(link)) {
3815 /* If PMP is supported, we have to do follow-up SRST.
3816 * Some PMPs don't send D2H Reg FIS after hardreset if
3817 * the first port is empty. Wait only for
3818 * ATA_TMOUT_PMP_SRST_WAIT.
3821 unsigned long pmp_deadline;
3823 pmp_deadline = ata_deadline(jiffies,
3824 ATA_TMOUT_PMP_SRST_WAIT);
3825 if (time_after(pmp_deadline, deadline))
3826 pmp_deadline = deadline;
3827 ata_wait_ready(link, pmp_deadline, check_ready);
3835 rc = ata_wait_ready(link, deadline, check_ready);
3837 if (rc && rc != -EAGAIN) {
3838 /* online is set iff link is online && reset succeeded */
3841 ata_link_err(link, "COMRESET failed (errno=%d)\n", rc);
3843 DPRINTK("EXIT, rc=%d\n", rc);
3848 * sata_std_hardreset - COMRESET w/o waiting or classification
3849 * @link: link to reset
3850 * @class: resulting class of attached device
3851 * @deadline: deadline jiffies for the operation
3853 * Standard SATA COMRESET w/o waiting or classification.
3856 * Kernel thread context (may sleep)
3859 * 0 if link offline, -EAGAIN if link online, -errno on errors.
3861 int sata_std_hardreset(struct ata_link *link, unsigned int *class,
3862 unsigned long deadline)
3864 const unsigned long *timing = sata_ehc_deb_timing(&link->eh_context);
3869 rc = sata_link_hardreset(link, timing, deadline, &online, NULL);
3870 return online ? -EAGAIN : rc;
3874 * ata_std_postreset - standard postreset callback
3875 * @link: the target ata_link
3876 * @classes: classes of attached devices
3878 * This function is invoked after a successful reset. Note that
3879 * the device might have been reset more than once using
3880 * different reset methods before postreset is invoked.
3883 * Kernel thread context (may sleep)
3885 void ata_std_postreset(struct ata_link *link, unsigned int *classes)
3891 /* reset complete, clear SError */
3892 if (!sata_scr_read(link, SCR_ERROR, &serror))
3893 sata_scr_write(link, SCR_ERROR, serror);
3895 /* print link status */
3896 sata_print_link_status(link);
3902 * ata_dev_same_device - Determine whether new ID matches configured device
3903 * @dev: device to compare against
3904 * @new_class: class of the new device
3905 * @new_id: IDENTIFY page of the new device
3907 * Compare @new_class and @new_id against @dev and determine
3908 * whether @dev is the device indicated by @new_class and
3915 * 1 if @dev matches @new_class and @new_id, 0 otherwise.
3917 static int ata_dev_same_device(struct ata_device *dev, unsigned int new_class,
3920 const u16 *old_id = dev->id;
3921 unsigned char model[2][ATA_ID_PROD_LEN + 1];
3922 unsigned char serial[2][ATA_ID_SERNO_LEN + 1];
3924 if (dev->class != new_class) {
3925 ata_dev_info(dev, "class mismatch %d != %d\n",
3926 dev->class, new_class);
3930 ata_id_c_string(old_id, model[0], ATA_ID_PROD, sizeof(model[0]));
3931 ata_id_c_string(new_id, model[1], ATA_ID_PROD, sizeof(model[1]));
3932 ata_id_c_string(old_id, serial[0], ATA_ID_SERNO, sizeof(serial[0]));
3933 ata_id_c_string(new_id, serial[1], ATA_ID_SERNO, sizeof(serial[1]));
3935 if (strcmp(model[0], model[1])) {
3936 ata_dev_info(dev, "model number mismatch '%s' != '%s'\n",
3937 model[0], model[1]);
3941 if (strcmp(serial[0], serial[1])) {
3942 ata_dev_info(dev, "serial number mismatch '%s' != '%s'\n",
3943 serial[0], serial[1]);
3951 * ata_dev_reread_id - Re-read IDENTIFY data
3952 * @dev: target ATA device
3953 * @readid_flags: read ID flags
3955 * Re-read IDENTIFY page and make sure @dev is still attached to
3959 * Kernel thread context (may sleep)
3962 * 0 on success, negative errno otherwise
3964 int ata_dev_reread_id(struct ata_device *dev, unsigned int readid_flags)
3966 unsigned int class = dev->class;
3967 u16 *id = (void *)dev->link->ap->sector_buf;
3971 rc = ata_dev_read_id(dev, &class, readid_flags, id);
3975 /* is the device still there? */
3976 if (!ata_dev_same_device(dev, class, id))
3979 memcpy(dev->id, id, sizeof(id[0]) * ATA_ID_WORDS);
3984 * ata_dev_revalidate - Revalidate ATA device
3985 * @dev: device to revalidate
3986 * @new_class: new class code
3987 * @readid_flags: read ID flags
3989 * Re-read IDENTIFY page, make sure @dev is still attached to the
3990 * port and reconfigure it according to the new IDENTIFY page.
3993 * Kernel thread context (may sleep)
3996 * 0 on success, negative errno otherwise
3998 int ata_dev_revalidate(struct ata_device *dev, unsigned int new_class,
3999 unsigned int readid_flags)
4001 u64 n_sectors = dev->n_sectors;
4002 u64 n_native_sectors = dev->n_native_sectors;
4005 if (!ata_dev_enabled(dev))
4008 /* fail early if !ATA && !ATAPI to avoid issuing [P]IDENTIFY to PMP */
4009 if (ata_class_enabled(new_class) &&
4010 new_class != ATA_DEV_ATA &&
4011 new_class != ATA_DEV_ATAPI &&
4012 new_class != ATA_DEV_SEMB) {
4013 ata_dev_info(dev, "class mismatch %u != %u\n",
4014 dev->class, new_class);
4020 rc = ata_dev_reread_id(dev, readid_flags);
4024 /* configure device according to the new ID */
4025 rc = ata_dev_configure(dev);
4029 /* verify n_sectors hasn't changed */
4030 if (dev->class != ATA_DEV_ATA || !n_sectors ||
4031 dev->n_sectors == n_sectors)
4034 /* n_sectors has changed */
4035 ata_dev_warn(dev, "n_sectors mismatch %llu != %llu\n",
4036 (unsigned long long)n_sectors,
4037 (unsigned long long)dev->n_sectors);
4040 * Something could have caused HPA to be unlocked
4041 * involuntarily. If n_native_sectors hasn't changed and the
4042 * new size matches it, keep the device.
4044 if (dev->n_native_sectors == n_native_sectors &&
4045 dev->n_sectors > n_sectors && dev->n_sectors == n_native_sectors) {
4047 "new n_sectors matches native, probably "
4048 "late HPA unlock, n_sectors updated\n");
4049 /* use the larger n_sectors */
4054 * Some BIOSes boot w/o HPA but resume w/ HPA locked. Try
4055 * unlocking HPA in those cases.
4057 * https://bugzilla.kernel.org/show_bug.cgi?id=15396
4059 if (dev->n_native_sectors == n_native_sectors &&
4060 dev->n_sectors < n_sectors && n_sectors == n_native_sectors &&
4061 !(dev->horkage & ATA_HORKAGE_BROKEN_HPA)) {
4063 "old n_sectors matches native, probably "
4064 "late HPA lock, will try to unlock HPA\n");
4065 /* try unlocking HPA */
4066 dev->flags |= ATA_DFLAG_UNLOCK_HPA;
4071 /* restore original n_[native_]sectors and fail */
4072 dev->n_native_sectors = n_native_sectors;
4073 dev->n_sectors = n_sectors;
4075 ata_dev_err(dev, "revalidation failed (errno=%d)\n", rc);
4079 struct ata_blacklist_entry {
4080 const char *model_num;
4081 const char *model_rev;
4082 unsigned long horkage;
4085 static const struct ata_blacklist_entry ata_device_blacklist [] = {
4086 /* Devices with DMA related problems under Linux */
4087 { "WDC AC11000H", NULL, ATA_HORKAGE_NODMA },
4088 { "WDC AC22100H", NULL, ATA_HORKAGE_NODMA },
4089 { "WDC AC32500H", NULL, ATA_HORKAGE_NODMA },
4090 { "WDC AC33100H", NULL, ATA_HORKAGE_NODMA },
4091 { "WDC AC31600H", NULL, ATA_HORKAGE_NODMA },
4092 { "WDC AC32100H", "24.09P07", ATA_HORKAGE_NODMA },
4093 { "WDC AC23200L", "21.10N21", ATA_HORKAGE_NODMA },
4094 { "Compaq CRD-8241B", NULL, ATA_HORKAGE_NODMA },
4095 { "CRD-8400B", NULL, ATA_HORKAGE_NODMA },
4096 { "CRD-848[02]B", NULL, ATA_HORKAGE_NODMA },
4097 { "CRD-84", NULL, ATA_HORKAGE_NODMA },
4098 { "SanDisk SDP3B", NULL, ATA_HORKAGE_NODMA },
4099 { "SanDisk SDP3B-64", NULL, ATA_HORKAGE_NODMA },
4100 { "SANYO CD-ROM CRD", NULL, ATA_HORKAGE_NODMA },
4101 { "HITACHI CDR-8", NULL, ATA_HORKAGE_NODMA },
4102 { "HITACHI CDR-8[34]35",NULL, ATA_HORKAGE_NODMA },
4103 { "Toshiba CD-ROM XM-6202B", NULL, ATA_HORKAGE_NODMA },
4104 { "TOSHIBA CD-ROM XM-1702BC", NULL, ATA_HORKAGE_NODMA },
4105 { "CD-532E-A", NULL, ATA_HORKAGE_NODMA },
4106 { "E-IDE CD-ROM CR-840",NULL, ATA_HORKAGE_NODMA },
4107 { "CD-ROM Drive/F5A", NULL, ATA_HORKAGE_NODMA },
4108 { "WPI CDD-820", NULL, ATA_HORKAGE_NODMA },
4109 { "SAMSUNG CD-ROM SC-148C", NULL, ATA_HORKAGE_NODMA },
4110 { "SAMSUNG CD-ROM SC", NULL, ATA_HORKAGE_NODMA },
4111 { "ATAPI CD-ROM DRIVE 40X MAXIMUM",NULL,ATA_HORKAGE_NODMA },
4112 { "_NEC DV5800A", NULL, ATA_HORKAGE_NODMA },
4113 { "SAMSUNG CD-ROM SN-124", "N001", ATA_HORKAGE_NODMA },
4114 { "Seagate STT20000A", NULL, ATA_HORKAGE_NODMA },
4115 { " 2GB ATA Flash Disk", "ADMA428M", ATA_HORKAGE_NODMA },
4116 /* Odd clown on sil3726/4726 PMPs */
4117 { "Config Disk", NULL, ATA_HORKAGE_DISABLE },
4119 /* Weird ATAPI devices */
4120 { "TORiSAN DVD-ROM DRD-N216", NULL, ATA_HORKAGE_MAX_SEC_128 },
4121 { "QUANTUM DAT DAT72-000", NULL, ATA_HORKAGE_ATAPI_MOD16_DMA },
4122 { "Slimtype DVD A DS8A8SH", NULL, ATA_HORKAGE_MAX_SEC_LBA48 },
4123 { "Slimtype DVD A DS8A9SH", NULL, ATA_HORKAGE_MAX_SEC_LBA48 },
4125 /* Devices we expect to fail diagnostics */
4127 /* Devices where NCQ should be avoided */
4129 { "WDC WD740ADFD-00", NULL, ATA_HORKAGE_NONCQ },
4130 { "WDC WD740ADFD-00NLR1", NULL, ATA_HORKAGE_NONCQ, },
4131 /* http://thread.gmane.org/gmane.linux.ide/14907 */
4132 { "FUJITSU MHT2060BH", NULL, ATA_HORKAGE_NONCQ },
4134 { "Maxtor *", "BANC*", ATA_HORKAGE_NONCQ },
4135 { "Maxtor 7V300F0", "VA111630", ATA_HORKAGE_NONCQ },
4136 { "ST380817AS", "3.42", ATA_HORKAGE_NONCQ },
4137 { "ST3160023AS", "3.42", ATA_HORKAGE_NONCQ },
4138 { "OCZ CORE_SSD", "02.10104", ATA_HORKAGE_NONCQ },
4140 /* Seagate NCQ + FLUSH CACHE firmware bug */
4141 { "ST31500341AS", "SD1[5-9]", ATA_HORKAGE_NONCQ |
4142 ATA_HORKAGE_FIRMWARE_WARN },
4144 { "ST31000333AS", "SD1[5-9]", ATA_HORKAGE_NONCQ |
4145 ATA_HORKAGE_FIRMWARE_WARN },
4147 { "ST3640[36]23AS", "SD1[5-9]", ATA_HORKAGE_NONCQ |
4148 ATA_HORKAGE_FIRMWARE_WARN },
4150 { "ST3320[68]13AS", "SD1[5-9]", ATA_HORKAGE_NONCQ |
4151 ATA_HORKAGE_FIRMWARE_WARN },
4153 /* Seagate Momentus SpinPoint M8 seem to have FPMDA_AA issues */
4154 { "ST1000LM024 HN-M101MBB", "2AR10001", ATA_HORKAGE_BROKEN_FPDMA_AA },
4155 { "ST1000LM024 HN-M101MBB", "2BA30001", ATA_HORKAGE_BROKEN_FPDMA_AA },
4157 /* Blacklist entries taken from Silicon Image 3124/3132
4158 Windows driver .inf file - also several Linux problem reports */
4159 { "HTS541060G9SA00", "MB3OC60D", ATA_HORKAGE_NONCQ, },
4160 { "HTS541080G9SA00", "MB4OC60D", ATA_HORKAGE_NONCQ, },
4161 { "HTS541010G9SA00", "MBZOC60D", ATA_HORKAGE_NONCQ, },
4163 /* https://bugzilla.kernel.org/show_bug.cgi?id=15573 */
4164 { "C300-CTFDDAC128MAG", "0001", ATA_HORKAGE_NONCQ, },
4166 /* devices which puke on READ_NATIVE_MAX */
4167 { "HDS724040KLSA80", "KFAOA20N", ATA_HORKAGE_BROKEN_HPA, },
4168 { "WDC WD3200JD-00KLB0", "WD-WCAMR1130137", ATA_HORKAGE_BROKEN_HPA },
4169 { "WDC WD2500JD-00HBB0", "WD-WMAL71490727", ATA_HORKAGE_BROKEN_HPA },
4170 { "MAXTOR 6L080L4", "A93.0500", ATA_HORKAGE_BROKEN_HPA },
4172 /* this one allows HPA unlocking but fails IOs on the area */
4173 { "OCZ-VERTEX", "1.30", ATA_HORKAGE_BROKEN_HPA },
4175 /* Devices which report 1 sector over size HPA */
4176 { "ST340823A", NULL, ATA_HORKAGE_HPA_SIZE, },
4177 { "ST320413A", NULL, ATA_HORKAGE_HPA_SIZE, },
4178 { "ST310211A", NULL, ATA_HORKAGE_HPA_SIZE, },
4180 /* Devices which get the IVB wrong */
4181 { "QUANTUM FIREBALLlct10 05", "A03.0900", ATA_HORKAGE_IVB, },
4182 /* Maybe we should just blacklist TSSTcorp... */
4183 { "TSSTcorp CDDVDW SH-S202[HJN]", "SB0[01]", ATA_HORKAGE_IVB, },
4185 /* Devices that do not need bridging limits applied */
4186 { "MTRON MSP-SATA*", NULL, ATA_HORKAGE_BRIDGE_OK, },
4187 { "BUFFALO HD-QSU2/R5", NULL, ATA_HORKAGE_BRIDGE_OK, },
4189 /* Devices which aren't very happy with higher link speeds */
4190 { "WD My Book", NULL, ATA_HORKAGE_1_5_GBPS, },
4191 { "Seagate FreeAgent GoFlex", NULL, ATA_HORKAGE_1_5_GBPS, },
4194 * Devices which choke on SETXFER. Applies only if both the
4195 * device and controller are SATA.
4197 { "PIONEER DVD-RW DVRTD08", NULL, ATA_HORKAGE_NOSETXFER },
4198 { "PIONEER DVD-RW DVRTD08A", NULL, ATA_HORKAGE_NOSETXFER },
4199 { "PIONEER DVD-RW DVR-215", NULL, ATA_HORKAGE_NOSETXFER },
4200 { "PIONEER DVD-RW DVR-212D", NULL, ATA_HORKAGE_NOSETXFER },
4201 { "PIONEER DVD-RW DVR-216D", NULL, ATA_HORKAGE_NOSETXFER },
4204 * Some WD SATA-I drives spin up and down erratically when the link
4205 * is put into the slumber mode. We don't have full list of the
4206 * affected devices. Disable LPM if the device matches one of the
4207 * known prefixes and is SATA-1. As a side effect LPM partial is
4210 * https://bugzilla.kernel.org/show_bug.cgi?id=57211
4212 { "WDC WD800JD-*", NULL, ATA_HORKAGE_WD_BROKEN_LPM },
4213 { "WDC WD1200JD-*", NULL, ATA_HORKAGE_WD_BROKEN_LPM },
4214 { "WDC WD1600JD-*", NULL, ATA_HORKAGE_WD_BROKEN_LPM },
4215 { "WDC WD2000JD-*", NULL, ATA_HORKAGE_WD_BROKEN_LPM },
4216 { "WDC WD2500JD-*", NULL, ATA_HORKAGE_WD_BROKEN_LPM },
4217 { "WDC WD3000JD-*", NULL, ATA_HORKAGE_WD_BROKEN_LPM },
4218 { "WDC WD3200JD-*", NULL, ATA_HORKAGE_WD_BROKEN_LPM },
4225 * glob_match - match a text string against a glob-style pattern
4226 * @text: the string to be examined
4227 * @pattern: the glob-style pattern to be matched against
4229 * Either/both of text and pattern can be empty strings.
4231 * Match text against a glob-style pattern, with wildcards and simple sets:
4233 * ? matches any single character.
4234 * * matches any run of characters.
4235 * [xyz] matches a single character from the set: x, y, or z.
4236 * [a-d] matches a single character from the range: a, b, c, or d.
4237 * [a-d0-9] matches a single character from either range.
4239 * The special characters ?, [, -, or *, can be matched using a set, eg. [*]
4240 * Behaviour with malformed patterns is undefined, though generally reasonable.
4242 * Sample patterns: "SD1?", "SD1[0-5]", "*R0", "SD*1?[012]*xx"
4244 * This function uses one level of recursion per '*' in pattern.
4245 * Since it calls _nothing_ else, and has _no_ explicit local variables,
4246 * this will not cause stack problems for any reasonable use here.
4249 * 0 on match, 1 otherwise.
4251 static int glob_match (const char *text, const char *pattern)
4254 /* Match single character or a '?' wildcard */
4255 if (*text == *pattern || *pattern == '?') {
4257 return 0; /* End of both strings: match */
4259 /* Match single char against a '[' bracketed ']' pattern set */
4260 if (!*text || *pattern != '[')
4261 break; /* Not a pattern set */
4262 while (*++pattern && *pattern != ']' && *text != *pattern) {
4263 if (*pattern == '-' && *(pattern - 1) != '[')
4264 if (*text > *(pattern - 1) && *text < *(pattern + 1)) {
4269 if (!*pattern || *pattern == ']')
4270 return 1; /* No match */
4271 while (*pattern && *pattern++ != ']');
4273 } while (*++text && *pattern);
4275 /* Match any run of chars against a '*' wildcard */
4276 if (*pattern == '*') {
4278 return 0; /* Match: avoid recursion at end of pattern */
4279 /* Loop to handle additional pattern chars after the wildcard */
4281 if (glob_match(text, pattern) == 0)
4282 return 0; /* Remainder matched */
4283 ++text; /* Absorb (match) this char and try again */
4286 if (!*text && !*pattern)
4287 return 0; /* End of both strings: match */
4288 return 1; /* No match */
4291 static unsigned long ata_dev_blacklisted(const struct ata_device *dev)
4293 unsigned char model_num[ATA_ID_PROD_LEN + 1];
4294 unsigned char model_rev[ATA_ID_FW_REV_LEN + 1];
4295 const struct ata_blacklist_entry *ad = ata_device_blacklist;
4297 ata_id_c_string(dev->id, model_num, ATA_ID_PROD, sizeof(model_num));
4298 ata_id_c_string(dev->id, model_rev, ATA_ID_FW_REV, sizeof(model_rev));
4300 while (ad->model_num) {
4301 if (!glob_match(model_num, ad->model_num)) {
4302 if (ad->model_rev == NULL)
4304 if (!glob_match(model_rev, ad->model_rev))
4312 static int ata_dma_blacklisted(const struct ata_device *dev)
4314 /* We don't support polling DMA.
4315 * DMA blacklist those ATAPI devices with CDB-intr (and use PIO)
4316 * if the LLDD handles only interrupts in the HSM_ST_LAST state.
4318 if ((dev->link->ap->flags & ATA_FLAG_PIO_POLLING) &&
4319 (dev->flags & ATA_DFLAG_CDB_INTR))
4321 return (dev->horkage & ATA_HORKAGE_NODMA) ? 1 : 0;
4325 * ata_is_40wire - check drive side detection
4328 * Perform drive side detection decoding, allowing for device vendors
4329 * who can't follow the documentation.
4332 static int ata_is_40wire(struct ata_device *dev)
4334 if (dev->horkage & ATA_HORKAGE_IVB)
4335 return ata_drive_40wire_relaxed(dev->id);
4336 return ata_drive_40wire(dev->id);
4340 * cable_is_40wire - 40/80/SATA decider
4341 * @ap: port to consider
4343 * This function encapsulates the policy for speed management
4344 * in one place. At the moment we don't cache the result but
4345 * there is a good case for setting ap->cbl to the result when
4346 * we are called with unknown cables (and figuring out if it
4347 * impacts hotplug at all).
4349 * Return 1 if the cable appears to be 40 wire.
4352 static int cable_is_40wire(struct ata_port *ap)
4354 struct ata_link *link;
4355 struct ata_device *dev;
4357 /* If the controller thinks we are 40 wire, we are. */
4358 if (ap->cbl == ATA_CBL_PATA40)
4361 /* If the controller thinks we are 80 wire, we are. */
4362 if (ap->cbl == ATA_CBL_PATA80 || ap->cbl == ATA_CBL_SATA)
4365 /* If the system is known to be 40 wire short cable (eg
4366 * laptop), then we allow 80 wire modes even if the drive
4369 if (ap->cbl == ATA_CBL_PATA40_SHORT)
4372 /* If the controller doesn't know, we scan.
4374 * Note: We look for all 40 wire detects at this point. Any
4375 * 80 wire detect is taken to be 80 wire cable because
4376 * - in many setups only the one drive (slave if present) will
4377 * give a valid detect
4378 * - if you have a non detect capable drive you don't want it
4379 * to colour the choice
4381 ata_for_each_link(link, ap, EDGE) {
4382 ata_for_each_dev(dev, link, ENABLED) {
4383 if (!ata_is_40wire(dev))
4391 * ata_dev_xfermask - Compute supported xfermask of the given device
4392 * @dev: Device to compute xfermask for
4394 * Compute supported xfermask of @dev and store it in
4395 * dev->*_mask. This function is responsible for applying all
4396 * known limits including host controller limits, device
4402 static void ata_dev_xfermask(struct ata_device *dev)
4404 struct ata_link *link = dev->link;
4405 struct ata_port *ap = link->ap;
4406 struct ata_host *host = ap->host;
4407 unsigned long xfer_mask;
4409 /* controller modes available */
4410 xfer_mask = ata_pack_xfermask(ap->pio_mask,
4411 ap->mwdma_mask, ap->udma_mask);
4413 /* drive modes available */
4414 xfer_mask &= ata_pack_xfermask(dev->pio_mask,
4415 dev->mwdma_mask, dev->udma_mask);
4416 xfer_mask &= ata_id_xfermask(dev->id);
4419 * CFA Advanced TrueIDE timings are not allowed on a shared
4422 if (ata_dev_pair(dev)) {
4423 /* No PIO5 or PIO6 */
4424 xfer_mask &= ~(0x03 << (ATA_SHIFT_PIO + 5));
4425 /* No MWDMA3 or MWDMA 4 */
4426 xfer_mask &= ~(0x03 << (ATA_SHIFT_MWDMA + 3));
4429 if (ata_dma_blacklisted(dev)) {
4430 xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA);
4432 "device is on DMA blacklist, disabling DMA\n");
4435 if ((host->flags & ATA_HOST_SIMPLEX) &&
4436 host->simplex_claimed && host->simplex_claimed != ap) {
4437 xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA);
4439 "simplex DMA is claimed by other device, disabling DMA\n");
4442 if (ap->flags & ATA_FLAG_NO_IORDY)
4443 xfer_mask &= ata_pio_mask_no_iordy(dev);
4445 if (ap->ops->mode_filter)
4446 xfer_mask = ap->ops->mode_filter(dev, xfer_mask);
4448 /* Apply cable rule here. Don't apply it early because when
4449 * we handle hot plug the cable type can itself change.
4450 * Check this last so that we know if the transfer rate was
4451 * solely limited by the cable.
4452 * Unknown or 80 wire cables reported host side are checked
4453 * drive side as well. Cases where we know a 40wire cable
4454 * is used safely for 80 are not checked here.
4456 if (xfer_mask & (0xF8 << ATA_SHIFT_UDMA))
4457 /* UDMA/44 or higher would be available */
4458 if (cable_is_40wire(ap)) {
4460 "limited to UDMA/33 due to 40-wire cable\n");
4461 xfer_mask &= ~(0xF8 << ATA_SHIFT_UDMA);
4464 ata_unpack_xfermask(xfer_mask, &dev->pio_mask,
4465 &dev->mwdma_mask, &dev->udma_mask);
4469 * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command
4470 * @dev: Device to which command will be sent
4472 * Issue SET FEATURES - XFER MODE command to device @dev
4476 * PCI/etc. bus probe sem.
4479 * 0 on success, AC_ERR_* mask otherwise.
4482 static unsigned int ata_dev_set_xfermode(struct ata_device *dev)
4484 struct ata_taskfile tf;
4485 unsigned int err_mask;
4487 /* set up set-features taskfile */
4488 DPRINTK("set features - xfer mode\n");
4490 /* Some controllers and ATAPI devices show flaky interrupt
4491 * behavior after setting xfer mode. Use polling instead.
4493 ata_tf_init(dev, &tf);
4494 tf.command = ATA_CMD_SET_FEATURES;
4495 tf.feature = SETFEATURES_XFER;
4496 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_POLLING;
4497 tf.protocol = ATA_PROT_NODATA;
4498 /* If we are using IORDY we must send the mode setting command */
4499 if (ata_pio_need_iordy(dev))
4500 tf.nsect = dev->xfer_mode;
4501 /* If the device has IORDY and the controller does not - turn it off */
4502 else if (ata_id_has_iordy(dev->id))
4504 else /* In the ancient relic department - skip all of this */
4507 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
4509 DPRINTK("EXIT, err_mask=%x\n", err_mask);
4514 * ata_dev_set_feature - Issue SET FEATURES - SATA FEATURES
4515 * @dev: Device to which command will be sent
4516 * @enable: Whether to enable or disable the feature
4517 * @feature: The sector count represents the feature to set
4519 * Issue SET FEATURES - SATA FEATURES command to device @dev
4520 * on port @ap with sector count
4523 * PCI/etc. bus probe sem.
4526 * 0 on success, AC_ERR_* mask otherwise.
4528 unsigned int ata_dev_set_feature(struct ata_device *dev, u8 enable, u8 feature)
4530 struct ata_taskfile tf;
4531 unsigned int err_mask;
4533 /* set up set-features taskfile */
4534 DPRINTK("set features - SATA features\n");
4536 ata_tf_init(dev, &tf);
4537 tf.command = ATA_CMD_SET_FEATURES;
4538 tf.feature = enable;
4539 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
4540 tf.protocol = ATA_PROT_NODATA;
4543 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
4545 DPRINTK("EXIT, err_mask=%x\n", err_mask);
4548 EXPORT_SYMBOL_GPL(ata_dev_set_feature);
4551 * ata_dev_init_params - Issue INIT DEV PARAMS command
4552 * @dev: Device to which command will be sent
4553 * @heads: Number of heads (taskfile parameter)
4554 * @sectors: Number of sectors (taskfile parameter)
4557 * Kernel thread context (may sleep)
4560 * 0 on success, AC_ERR_* mask otherwise.
4562 static unsigned int ata_dev_init_params(struct ata_device *dev,
4563 u16 heads, u16 sectors)
4565 struct ata_taskfile tf;
4566 unsigned int err_mask;
4568 /* Number of sectors per track 1-255. Number of heads 1-16 */
4569 if (sectors < 1 || sectors > 255 || heads < 1 || heads > 16)
4570 return AC_ERR_INVALID;
4572 /* set up init dev params taskfile */
4573 DPRINTK("init dev params \n");
4575 ata_tf_init(dev, &tf);
4576 tf.command = ATA_CMD_INIT_DEV_PARAMS;
4577 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
4578 tf.protocol = ATA_PROT_NODATA;
4580 tf.device |= (heads - 1) & 0x0f; /* max head = num. of heads - 1 */
4582 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
4583 /* A clean abort indicates an original or just out of spec drive
4584 and we should continue as we issue the setup based on the
4585 drive reported working geometry */
4586 if (err_mask == AC_ERR_DEV && (tf.feature & ATA_ABORTED))
4589 DPRINTK("EXIT, err_mask=%x\n", err_mask);
4594 * ata_sg_clean - Unmap DMA memory associated with command
4595 * @qc: Command containing DMA memory to be released
4597 * Unmap all mapped DMA memory associated with this command.
4600 * spin_lock_irqsave(host lock)
4602 void ata_sg_clean(struct ata_queued_cmd *qc)
4604 struct ata_port *ap = qc->ap;
4605 struct scatterlist *sg = qc->sg;
4606 int dir = qc->dma_dir;
4608 WARN_ON_ONCE(sg == NULL);
4610 VPRINTK("unmapping %u sg elements\n", qc->n_elem);
4613 dma_unmap_sg(ap->dev, sg, qc->orig_n_elem, dir);
4615 qc->flags &= ~ATA_QCFLAG_DMAMAP;
4620 * atapi_check_dma - Check whether ATAPI DMA can be supported
4621 * @qc: Metadata associated with taskfile to check
4623 * Allow low-level driver to filter ATA PACKET commands, returning
4624 * a status indicating whether or not it is OK to use DMA for the
4625 * supplied PACKET command.
4628 * spin_lock_irqsave(host lock)
4630 * RETURNS: 0 when ATAPI DMA can be used
4633 int atapi_check_dma(struct ata_queued_cmd *qc)
4635 struct ata_port *ap = qc->ap;
4637 /* Don't allow DMA if it isn't multiple of 16 bytes. Quite a
4638 * few ATAPI devices choke on such DMA requests.
4640 if (!(qc->dev->horkage & ATA_HORKAGE_ATAPI_MOD16_DMA) &&
4641 unlikely(qc->nbytes & 15))
4644 if (ap->ops->check_atapi_dma)
4645 return ap->ops->check_atapi_dma(qc);
4651 * ata_std_qc_defer - Check whether a qc needs to be deferred
4652 * @qc: ATA command in question
4654 * Non-NCQ commands cannot run with any other command, NCQ or
4655 * not. As upper layer only knows the queue depth, we are
4656 * responsible for maintaining exclusion. This function checks
4657 * whether a new command @qc can be issued.
4660 * spin_lock_irqsave(host lock)
4663 * ATA_DEFER_* if deferring is needed, 0 otherwise.
4665 int ata_std_qc_defer(struct ata_queued_cmd *qc)
4667 struct ata_link *link = qc->dev->link;
4669 if (qc->tf.protocol == ATA_PROT_NCQ) {
4670 if (!ata_tag_valid(link->active_tag))
4673 if (!ata_tag_valid(link->active_tag) && !link->sactive)
4677 return ATA_DEFER_LINK;
4680 void ata_noop_qc_prep(struct ata_queued_cmd *qc) { }
4683 * ata_sg_init - Associate command with scatter-gather table.
4684 * @qc: Command to be associated
4685 * @sg: Scatter-gather table.
4686 * @n_elem: Number of elements in s/g table.
4688 * Initialize the data-related elements of queued_cmd @qc
4689 * to point to a scatter-gather table @sg, containing @n_elem
4693 * spin_lock_irqsave(host lock)
4695 void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
4696 unsigned int n_elem)
4699 qc->n_elem = n_elem;
4704 * ata_sg_setup - DMA-map the scatter-gather table associated with a command.
4705 * @qc: Command with scatter-gather table to be mapped.
4707 * DMA-map the scatter-gather table associated with queued_cmd @qc.
4710 * spin_lock_irqsave(host lock)
4713 * Zero on success, negative on error.
4716 static int ata_sg_setup(struct ata_queued_cmd *qc)
4718 struct ata_port *ap = qc->ap;
4719 unsigned int n_elem;
4721 VPRINTK("ENTER, ata%u\n", ap->print_id);
4723 n_elem = dma_map_sg(ap->dev, qc->sg, qc->n_elem, qc->dma_dir);
4727 DPRINTK("%d sg elements mapped\n", n_elem);
4728 qc->orig_n_elem = qc->n_elem;
4729 qc->n_elem = n_elem;
4730 qc->flags |= ATA_QCFLAG_DMAMAP;
4736 * swap_buf_le16 - swap halves of 16-bit words in place
4737 * @buf: Buffer to swap
4738 * @buf_words: Number of 16-bit words in buffer.
4740 * Swap halves of 16-bit words if needed to convert from
4741 * little-endian byte order to native cpu byte order, or
4745 * Inherited from caller.
4747 void swap_buf_le16(u16 *buf, unsigned int buf_words)
4752 for (i = 0; i < buf_words; i++)
4753 buf[i] = le16_to_cpu(buf[i]);
4754 #endif /* __BIG_ENDIAN */
4758 * ata_qc_new - Request an available ATA command, for queueing
4761 * Some ATA host controllers may implement a queue depth which is less
4762 * than ATA_MAX_QUEUE. So we shouldn't allocate a tag which is beyond
4763 * the hardware limitation.
4769 static struct ata_queued_cmd *ata_qc_new(struct ata_port *ap)
4771 struct ata_queued_cmd *qc = NULL;
4772 unsigned int max_queue = ap->host->n_tags;
4773 unsigned int i, tag;
4775 /* no command while frozen */
4776 if (unlikely(ap->pflags & ATA_PFLAG_FROZEN))
4779 for (i = 0, tag = ap->last_tag + 1; i < max_queue; i++, tag++) {
4780 tag = tag < max_queue ? tag : 0;
4782 /* the last tag is reserved for internal command. */
4783 if (tag == ATA_TAG_INTERNAL)
4786 if (!test_and_set_bit(tag, &ap->qc_allocated)) {
4787 qc = __ata_qc_from_tag(ap, tag);
4798 * ata_qc_new_init - Request an available ATA command, and initialize it
4799 * @dev: Device from whom we request an available command structure
4805 struct ata_queued_cmd *ata_qc_new_init(struct ata_device *dev)
4807 struct ata_port *ap = dev->link->ap;
4808 struct ata_queued_cmd *qc;
4810 qc = ata_qc_new(ap);
4823 * ata_qc_free - free unused ata_queued_cmd
4824 * @qc: Command to complete
4826 * Designed to free unused ata_queued_cmd object
4827 * in case something prevents using it.
4830 * spin_lock_irqsave(host lock)
4832 void ata_qc_free(struct ata_queued_cmd *qc)
4834 struct ata_port *ap;
4837 WARN_ON_ONCE(qc == NULL); /* ata_qc_from_tag _might_ return NULL */
4842 if (likely(ata_tag_valid(tag))) {
4843 qc->tag = ATA_TAG_POISON;
4844 clear_bit(tag, &ap->qc_allocated);
4848 void __ata_qc_complete(struct ata_queued_cmd *qc)
4850 struct ata_port *ap;
4851 struct ata_link *link;
4853 WARN_ON_ONCE(qc == NULL); /* ata_qc_from_tag _might_ return NULL */
4854 WARN_ON_ONCE(!(qc->flags & ATA_QCFLAG_ACTIVE));
4856 link = qc->dev->link;
4858 if (likely(qc->flags & ATA_QCFLAG_DMAMAP))
4861 /* command should be marked inactive atomically with qc completion */
4862 if (qc->tf.protocol == ATA_PROT_NCQ) {
4863 link->sactive &= ~(1 << qc->tag);
4865 ap->nr_active_links--;
4867 link->active_tag = ATA_TAG_POISON;
4868 ap->nr_active_links--;
4871 /* clear exclusive status */
4872 if (unlikely(qc->flags & ATA_QCFLAG_CLEAR_EXCL &&
4873 ap->excl_link == link))
4874 ap->excl_link = NULL;
4876 /* atapi: mark qc as inactive to prevent the interrupt handler
4877 * from completing the command twice later, before the error handler
4878 * is called. (when rc != 0 and atapi request sense is needed)
4880 qc->flags &= ~ATA_QCFLAG_ACTIVE;
4881 ap->qc_active &= ~(1 << qc->tag);
4883 /* call completion callback */
4884 qc->complete_fn(qc);
4887 static void fill_result_tf(struct ata_queued_cmd *qc)
4889 struct ata_port *ap = qc->ap;
4891 qc->result_tf.flags = qc->tf.flags;
4892 ap->ops->qc_fill_rtf(qc);
4895 static void ata_verify_xfer(struct ata_queued_cmd *qc)
4897 struct ata_device *dev = qc->dev;
4899 if (ata_is_nodata(qc->tf.protocol))
4902 if ((dev->mwdma_mask || dev->udma_mask) && ata_is_pio(qc->tf.protocol))
4905 dev->flags &= ~ATA_DFLAG_DUBIOUS_XFER;
4909 * ata_qc_complete - Complete an active ATA command
4910 * @qc: Command to complete
4912 * Indicate to the mid and upper layers that an ATA command has
4913 * completed, with either an ok or not-ok status.
4915 * Refrain from calling this function multiple times when
4916 * successfully completing multiple NCQ commands.
4917 * ata_qc_complete_multiple() should be used instead, which will
4918 * properly update IRQ expect state.
4921 * spin_lock_irqsave(host lock)
4923 void ata_qc_complete(struct ata_queued_cmd *qc)
4925 struct ata_port *ap = qc->ap;
4927 /* XXX: New EH and old EH use different mechanisms to
4928 * synchronize EH with regular execution path.
4930 * In new EH, a failed qc is marked with ATA_QCFLAG_FAILED.
4931 * Normal execution path is responsible for not accessing a
4932 * failed qc. libata core enforces the rule by returning NULL
4933 * from ata_qc_from_tag() for failed qcs.
4935 * Old EH depends on ata_qc_complete() nullifying completion
4936 * requests if ATA_QCFLAG_EH_SCHEDULED is set. Old EH does
4937 * not synchronize with interrupt handler. Only PIO task is
4940 if (ap->ops->error_handler) {
4941 struct ata_device *dev = qc->dev;
4942 struct ata_eh_info *ehi = &dev->link->eh_info;
4944 if (unlikely(qc->err_mask))
4945 qc->flags |= ATA_QCFLAG_FAILED;
4948 * Finish internal commands without any further processing
4949 * and always with the result TF filled.
4951 if (unlikely(ata_tag_internal(qc->tag))) {
4953 __ata_qc_complete(qc);
4958 * Non-internal qc has failed. Fill the result TF and
4961 if (unlikely(qc->flags & ATA_QCFLAG_FAILED)) {
4963 ata_qc_schedule_eh(qc);
4967 WARN_ON_ONCE(ap->pflags & ATA_PFLAG_FROZEN);
4969 /* read result TF if requested */
4970 if (qc->flags & ATA_QCFLAG_RESULT_TF)
4973 /* Some commands need post-processing after successful
4976 switch (qc->tf.command) {
4977 case ATA_CMD_SET_FEATURES:
4978 if (qc->tf.feature != SETFEATURES_WC_ON &&
4979 qc->tf.feature != SETFEATURES_WC_OFF)
4982 case ATA_CMD_INIT_DEV_PARAMS: /* CHS translation changed */
4983 case ATA_CMD_SET_MULTI: /* multi_count changed */
4984 /* revalidate device */
4985 ehi->dev_action[dev->devno] |= ATA_EH_REVALIDATE;
4986 ata_port_schedule_eh(ap);
4990 dev->flags |= ATA_DFLAG_SLEEPING;
4994 if (unlikely(dev->flags & ATA_DFLAG_DUBIOUS_XFER))
4995 ata_verify_xfer(qc);
4997 __ata_qc_complete(qc);
4999 if (qc->flags & ATA_QCFLAG_EH_SCHEDULED)
5002 /* read result TF if failed or requested */
5003 if (qc->err_mask || qc->flags & ATA_QCFLAG_RESULT_TF)
5006 __ata_qc_complete(qc);
5011 * ata_qc_complete_multiple - Complete multiple qcs successfully
5012 * @ap: port in question
5013 * @qc_active: new qc_active mask
5015 * Complete in-flight commands. This functions is meant to be
5016 * called from low-level driver's interrupt routine to complete
5017 * requests normally. ap->qc_active and @qc_active is compared
5018 * and commands are completed accordingly.
5020 * Always use this function when completing multiple NCQ commands
5021 * from IRQ handlers instead of calling ata_qc_complete()
5022 * multiple times to keep IRQ expect status properly in sync.
5025 * spin_lock_irqsave(host lock)
5028 * Number of completed commands on success, -errno otherwise.
5030 int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active)
5035 done_mask = ap->qc_active ^ qc_active;
5037 if (unlikely(done_mask & qc_active)) {
5038 ata_port_err(ap, "illegal qc_active transition (%08x->%08x)\n",
5039 ap->qc_active, qc_active);
5044 struct ata_queued_cmd *qc;
5045 unsigned int tag = __ffs(done_mask);
5047 qc = ata_qc_from_tag(ap, tag);
5049 ata_qc_complete(qc);
5052 done_mask &= ~(1 << tag);
5059 * ata_qc_issue - issue taskfile to device
5060 * @qc: command to issue to device
5062 * Prepare an ATA command to submission to device.
5063 * This includes mapping the data into a DMA-able
5064 * area, filling in the S/G table, and finally
5065 * writing the taskfile to hardware, starting the command.
5068 * spin_lock_irqsave(host lock)
5070 void ata_qc_issue(struct ata_queued_cmd *qc)
5072 struct ata_port *ap = qc->ap;
5073 struct ata_link *link = qc->dev->link;
5074 u8 prot = qc->tf.protocol;
5076 /* Make sure only one non-NCQ command is outstanding. The
5077 * check is skipped for old EH because it reuses active qc to
5078 * request ATAPI sense.
5080 WARN_ON_ONCE(ap->ops->error_handler && ata_tag_valid(link->active_tag));
5082 if (ata_is_ncq(prot)) {
5083 WARN_ON_ONCE(link->sactive & (1 << qc->tag));
5086 ap->nr_active_links++;
5087 link->sactive |= 1 << qc->tag;
5089 WARN_ON_ONCE(link->sactive);
5091 ap->nr_active_links++;
5092 link->active_tag = qc->tag;
5095 qc->flags |= ATA_QCFLAG_ACTIVE;
5096 ap->qc_active |= 1 << qc->tag;
5099 * We guarantee to LLDs that they will have at least one
5100 * non-zero sg if the command is a data command.
5102 if (WARN_ON_ONCE(ata_is_data(prot) &&
5103 (!qc->sg || !qc->n_elem || !qc->nbytes)))
5106 if (ata_is_dma(prot) || (ata_is_pio(prot) &&
5107 (ap->flags & ATA_FLAG_PIO_DMA)))
5108 if (ata_sg_setup(qc))
5111 /* if device is sleeping, schedule reset and abort the link */
5112 if (unlikely(qc->dev->flags & ATA_DFLAG_SLEEPING)) {
5113 link->eh_info.action |= ATA_EH_RESET;
5114 ata_ehi_push_desc(&link->eh_info, "waking up from sleep");
5115 ata_link_abort(link);
5119 ap->ops->qc_prep(qc);
5121 qc->err_mask |= ap->ops->qc_issue(qc);
5122 if (unlikely(qc->err_mask))
5127 qc->err_mask |= AC_ERR_SYSTEM;
5129 ata_qc_complete(qc);
5133 * sata_scr_valid - test whether SCRs are accessible
5134 * @link: ATA link to test SCR accessibility for
5136 * Test whether SCRs are accessible for @link.
5142 * 1 if SCRs are accessible, 0 otherwise.
5144 int sata_scr_valid(struct ata_link *link)
5146 struct ata_port *ap = link->ap;
5148 return (ap->flags & ATA_FLAG_SATA) && ap->ops->scr_read;
5152 * sata_scr_read - read SCR register of the specified port
5153 * @link: ATA link to read SCR for
5155 * @val: Place to store read value
5157 * Read SCR register @reg of @link into *@val. This function is
5158 * guaranteed to succeed if @link is ap->link, the cable type of
5159 * the port is SATA and the port implements ->scr_read.
5162 * None if @link is ap->link. Kernel thread context otherwise.
5165 * 0 on success, negative errno on failure.
5167 int sata_scr_read(struct ata_link *link, int reg, u32 *val)
5169 if (ata_is_host_link(link)) {
5170 if (sata_scr_valid(link))
5171 return link->ap->ops->scr_read(link, reg, val);
5175 return sata_pmp_scr_read(link, reg, val);
5179 * sata_scr_write - write SCR register of the specified port
5180 * @link: ATA link to write SCR for
5181 * @reg: SCR to write
5182 * @val: value to write
5184 * Write @val to SCR register @reg of @link. This function is
5185 * guaranteed to succeed if @link is ap->link, the cable type of
5186 * the port is SATA and the port implements ->scr_read.
5189 * None if @link is ap->link. Kernel thread context otherwise.
5192 * 0 on success, negative errno on failure.
5194 int sata_scr_write(struct ata_link *link, int reg, u32 val)
5196 if (ata_is_host_link(link)) {
5197 if (sata_scr_valid(link))
5198 return link->ap->ops->scr_write(link, reg, val);
5202 return sata_pmp_scr_write(link, reg, val);
5206 * sata_scr_write_flush - write SCR register of the specified port and flush
5207 * @link: ATA link to write SCR for
5208 * @reg: SCR to write
5209 * @val: value to write
5211 * This function is identical to sata_scr_write() except that this
5212 * function performs flush after writing to the register.
5215 * None if @link is ap->link. Kernel thread context otherwise.
5218 * 0 on success, negative errno on failure.
5220 int sata_scr_write_flush(struct ata_link *link, int reg, u32 val)
5222 if (ata_is_host_link(link)) {
5225 if (sata_scr_valid(link)) {
5226 rc = link->ap->ops->scr_write(link, reg, val);
5228 rc = link->ap->ops->scr_read(link, reg, &val);
5234 return sata_pmp_scr_write(link, reg, val);
5238 * ata_phys_link_online - test whether the given link is online
5239 * @link: ATA link to test
5241 * Test whether @link is online. Note that this function returns
5242 * 0 if online status of @link cannot be obtained, so
5243 * ata_link_online(link) != !ata_link_offline(link).
5249 * True if the port online status is available and online.
5251 bool ata_phys_link_online(struct ata_link *link)
5255 if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0 &&
5256 ata_sstatus_online(sstatus))
5262 * ata_phys_link_offline - test whether the given link is offline
5263 * @link: ATA link to test
5265 * Test whether @link is offline. Note that this function
5266 * returns 0 if offline status of @link cannot be obtained, so
5267 * ata_link_online(link) != !ata_link_offline(link).
5273 * True if the port offline status is available and offline.
5275 bool ata_phys_link_offline(struct ata_link *link)
5279 if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0 &&
5280 !ata_sstatus_online(sstatus))
5286 * ata_link_online - test whether the given link is online
5287 * @link: ATA link to test
5289 * Test whether @link is online. This is identical to
5290 * ata_phys_link_online() when there's no slave link. When
5291 * there's a slave link, this function should only be called on
5292 * the master link and will return true if any of M/S links is
5299 * True if the port online status is available and online.
5301 bool ata_link_online(struct ata_link *link)
5303 struct ata_link *slave = link->ap->slave_link;
5305 WARN_ON(link == slave); /* shouldn't be called on slave link */
5307 return ata_phys_link_online(link) ||
5308 (slave && ata_phys_link_online(slave));
5312 * ata_link_offline - test whether the given link is offline
5313 * @link: ATA link to test
5315 * Test whether @link is offline. This is identical to
5316 * ata_phys_link_offline() when there's no slave link. When
5317 * there's a slave link, this function should only be called on
5318 * the master link and will return true if both M/S links are
5325 * True if the port offline status is available and offline.
5327 bool ata_link_offline(struct ata_link *link)
5329 struct ata_link *slave = link->ap->slave_link;
5331 WARN_ON(link == slave); /* shouldn't be called on slave link */
5333 return ata_phys_link_offline(link) &&
5334 (!slave || ata_phys_link_offline(slave));
5338 static int ata_port_request_pm(struct ata_port *ap, pm_message_t mesg,
5339 unsigned int action, unsigned int ehi_flags,
5342 struct ata_link *link;
5343 unsigned long flags;
5346 /* Previous resume operation might still be in
5347 * progress. Wait for PM_PENDING to clear.
5349 if (ap->pflags & ATA_PFLAG_PM_PENDING) {
5354 ata_port_wait_eh(ap);
5355 WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING);
5358 /* request PM ops to EH */
5359 spin_lock_irqsave(ap->lock, flags);
5363 ap->pm_result = async;
5365 ap->pm_result = &rc;
5367 ap->pflags |= ATA_PFLAG_PM_PENDING;
5368 ata_for_each_link(link, ap, HOST_FIRST) {
5369 link->eh_info.action |= action;
5370 link->eh_info.flags |= ehi_flags;
5373 ata_port_schedule_eh(ap);
5375 spin_unlock_irqrestore(ap->lock, flags);
5377 /* wait and check result */
5379 ata_port_wait_eh(ap);
5380 WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING);
5386 static int __ata_port_suspend_common(struct ata_port *ap, pm_message_t mesg, int *async)
5389 * On some hardware, device fails to respond after spun down
5390 * for suspend. As the device won't be used before being
5391 * resumed, we don't need to touch the device. Ask EH to skip
5392 * the usual stuff and proceed directly to suspend.
5394 * http://thread.gmane.org/gmane.linux.ide/46764
5396 unsigned int ehi_flags = ATA_EHI_QUIET | ATA_EHI_NO_AUTOPSY |
5397 ATA_EHI_NO_RECOVERY;
5398 return ata_port_request_pm(ap, mesg, 0, ehi_flags, async);
5401 static int ata_port_suspend_common(struct device *dev, pm_message_t mesg)
5403 struct ata_port *ap = to_ata_port(dev);
5405 return __ata_port_suspend_common(ap, mesg, NULL);
5408 static int ata_port_suspend(struct device *dev)
5410 if (pm_runtime_suspended(dev))
5413 return ata_port_suspend_common(dev, PMSG_SUSPEND);
5416 static int ata_port_do_freeze(struct device *dev)
5418 if (pm_runtime_suspended(dev))
5421 return ata_port_suspend_common(dev, PMSG_FREEZE);
5424 static int ata_port_poweroff(struct device *dev)
5426 return ata_port_suspend_common(dev, PMSG_HIBERNATE);
5429 static int __ata_port_resume_common(struct ata_port *ap, pm_message_t mesg,
5434 rc = ata_port_request_pm(ap, mesg, ATA_EH_RESET,
5435 ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET, async);
5439 static int ata_port_resume_common(struct device *dev, pm_message_t mesg)
5441 struct ata_port *ap = to_ata_port(dev);
5443 return __ata_port_resume_common(ap, mesg, NULL);
5446 static int ata_port_resume(struct device *dev)
5450 rc = ata_port_resume_common(dev, PMSG_RESUME);
5452 pm_runtime_disable(dev);
5453 pm_runtime_set_active(dev);
5454 pm_runtime_enable(dev);
5461 * For ODDs, the upper layer will poll for media change every few seconds,
5462 * which will make it enter and leave suspend state every few seconds. And
5463 * as each suspend will cause a hard/soft reset, the gain of runtime suspend
5464 * is very little and the ODD may malfunction after constantly being reset.
5465 * So the idle callback here will not proceed to suspend if a non-ZPODD capable
5466 * ODD is attached to the port.
5468 static int ata_port_runtime_idle(struct device *dev)
5470 struct ata_port *ap = to_ata_port(dev);
5471 struct ata_link *link;
5472 struct ata_device *adev;
5474 ata_for_each_link(link, ap, HOST_FIRST) {
5475 ata_for_each_dev(adev, link, ENABLED)
5476 if (adev->class == ATA_DEV_ATAPI &&
5477 !zpodd_dev_enabled(adev))
5484 static int ata_port_runtime_suspend(struct device *dev)
5486 return ata_port_suspend_common(dev, PMSG_AUTO_SUSPEND);
5489 static int ata_port_runtime_resume(struct device *dev)
5491 return ata_port_resume_common(dev, PMSG_AUTO_RESUME);
5494 static const struct dev_pm_ops ata_port_pm_ops = {
5495 .suspend = ata_port_suspend,
5496 .resume = ata_port_resume,
5497 .freeze = ata_port_do_freeze,
5498 .thaw = ata_port_resume,
5499 .poweroff = ata_port_poweroff,
5500 .restore = ata_port_resume,
5502 .runtime_suspend = ata_port_runtime_suspend,
5503 .runtime_resume = ata_port_runtime_resume,
5504 .runtime_idle = ata_port_runtime_idle,
5507 /* sas ports don't participate in pm runtime management of ata_ports,
5508 * and need to resume ata devices at the domain level, not the per-port
5509 * level. sas suspend/resume is async to allow parallel port recovery
5510 * since sas has multiple ata_port instances per Scsi_Host.
5512 int ata_sas_port_async_suspend(struct ata_port *ap, int *async)
5514 return __ata_port_suspend_common(ap, PMSG_SUSPEND, async);
5516 EXPORT_SYMBOL_GPL(ata_sas_port_async_suspend);
5518 int ata_sas_port_async_resume(struct ata_port *ap, int *async)
5520 return __ata_port_resume_common(ap, PMSG_RESUME, async);
5522 EXPORT_SYMBOL_GPL(ata_sas_port_async_resume);
5526 * ata_host_suspend - suspend host
5527 * @host: host to suspend
5530 * Suspend @host. Actual operation is performed by port suspend.
5532 int ata_host_suspend(struct ata_host *host, pm_message_t mesg)
5534 host->dev->power.power_state = mesg;
5539 * ata_host_resume - resume host
5540 * @host: host to resume
5542 * Resume @host. Actual operation is performed by port resume.
5544 void ata_host_resume(struct ata_host *host)
5546 host->dev->power.power_state = PMSG_ON;
5550 struct device_type ata_port_type = {
5553 .pm = &ata_port_pm_ops,
5558 * ata_dev_init - Initialize an ata_device structure
5559 * @dev: Device structure to initialize
5561 * Initialize @dev in preparation for probing.
5564 * Inherited from caller.
5566 void ata_dev_init(struct ata_device *dev)
5568 struct ata_link *link = ata_dev_phys_link(dev);
5569 struct ata_port *ap = link->ap;
5570 unsigned long flags;
5572 /* SATA spd limit is bound to the attached device, reset together */
5573 link->sata_spd_limit = link->hw_sata_spd_limit;
5576 /* High bits of dev->flags are used to record warm plug
5577 * requests which occur asynchronously. Synchronize using
5580 spin_lock_irqsave(ap->lock, flags);
5581 dev->flags &= ~ATA_DFLAG_INIT_MASK;
5583 spin_unlock_irqrestore(ap->lock, flags);
5585 memset((void *)dev + ATA_DEVICE_CLEAR_BEGIN, 0,
5586 ATA_DEVICE_CLEAR_END - ATA_DEVICE_CLEAR_BEGIN);
5587 dev->pio_mask = UINT_MAX;
5588 dev->mwdma_mask = UINT_MAX;
5589 dev->udma_mask = UINT_MAX;
5593 * ata_link_init - Initialize an ata_link structure
5594 * @ap: ATA port link is attached to
5595 * @link: Link structure to initialize
5596 * @pmp: Port multiplier port number
5601 * Kernel thread context (may sleep)
5603 void ata_link_init(struct ata_port *ap, struct ata_link *link, int pmp)
5607 /* clear everything except for devices */
5608 memset((void *)link + ATA_LINK_CLEAR_BEGIN, 0,
5609 ATA_LINK_CLEAR_END - ATA_LINK_CLEAR_BEGIN);
5613 link->active_tag = ATA_TAG_POISON;
5614 link->hw_sata_spd_limit = UINT_MAX;
5616 /* can't use iterator, ap isn't initialized yet */
5617 for (i = 0; i < ATA_MAX_DEVICES; i++) {
5618 struct ata_device *dev = &link->device[i];
5621 dev->devno = dev - link->device;
5622 #ifdef CONFIG_ATA_ACPI
5623 dev->gtf_filter = ata_acpi_gtf_filter;
5630 * sata_link_init_spd - Initialize link->sata_spd_limit
5631 * @link: Link to configure sata_spd_limit for
5633 * Initialize @link->[hw_]sata_spd_limit to the currently
5637 * Kernel thread context (may sleep).
5640 * 0 on success, -errno on failure.
5642 int sata_link_init_spd(struct ata_link *link)
5647 rc = sata_scr_read(link, SCR_CONTROL, &link->saved_scontrol);
5651 spd = (link->saved_scontrol >> 4) & 0xf;
5653 link->hw_sata_spd_limit &= (1 << spd) - 1;
5655 ata_force_link_limits(link);
5657 link->sata_spd_limit = link->hw_sata_spd_limit;
5663 * ata_port_alloc - allocate and initialize basic ATA port resources
5664 * @host: ATA host this allocated port belongs to
5666 * Allocate and initialize basic ATA port resources.
5669 * Allocate ATA port on success, NULL on failure.
5672 * Inherited from calling layer (may sleep).
5674 struct ata_port *ata_port_alloc(struct ata_host *host)
5676 struct ata_port *ap;
5680 ap = kzalloc(sizeof(*ap), GFP_KERNEL);
5684 ap->pflags |= ATA_PFLAG_INITIALIZING | ATA_PFLAG_FROZEN;
5685 ap->lock = &host->lock;
5688 ap->dev = host->dev;
5690 #if defined(ATA_VERBOSE_DEBUG)
5691 /* turn on all debugging levels */
5692 ap->msg_enable = 0x00FF;
5693 #elif defined(ATA_DEBUG)
5694 ap->msg_enable = ATA_MSG_DRV | ATA_MSG_INFO | ATA_MSG_CTL | ATA_MSG_WARN | ATA_MSG_ERR;
5696 ap->msg_enable = ATA_MSG_DRV | ATA_MSG_ERR | ATA_MSG_WARN;
5699 mutex_init(&ap->scsi_scan_mutex);
5700 INIT_DELAYED_WORK(&ap->hotplug_task, ata_scsi_hotplug);
5701 INIT_WORK(&ap->scsi_rescan_task, ata_scsi_dev_rescan);
5702 INIT_LIST_HEAD(&ap->eh_done_q);
5703 init_waitqueue_head(&ap->eh_wait_q);
5704 init_completion(&ap->park_req_pending);
5705 init_timer_deferrable(&ap->fastdrain_timer);
5706 ap->fastdrain_timer.function = ata_eh_fastdrain_timerfn;
5707 ap->fastdrain_timer.data = (unsigned long)ap;
5709 ap->cbl = ATA_CBL_NONE;
5711 ata_link_init(ap, &ap->link, 0);
5714 ap->stats.unhandled_irq = 1;
5715 ap->stats.idle_irq = 1;
5717 ata_sff_port_init(ap);
5722 static void ata_host_release(struct device *gendev, void *res)
5724 struct ata_host *host = dev_get_drvdata(gendev);
5727 for (i = 0; i < host->n_ports; i++) {
5728 struct ata_port *ap = host->ports[i];
5734 scsi_host_put(ap->scsi_host);
5736 kfree(ap->pmp_link);
5737 kfree(ap->slave_link);
5739 host->ports[i] = NULL;
5742 dev_set_drvdata(gendev, NULL);
5746 * ata_host_alloc - allocate and init basic ATA host resources
5747 * @dev: generic device this host is associated with
5748 * @max_ports: maximum number of ATA ports associated with this host
5750 * Allocate and initialize basic ATA host resources. LLD calls
5751 * this function to allocate a host, initializes it fully and
5752 * attaches it using ata_host_register().
5754 * @max_ports ports are allocated and host->n_ports is
5755 * initialized to @max_ports. The caller is allowed to decrease
5756 * host->n_ports before calling ata_host_register(). The unused
5757 * ports will be automatically freed on registration.
5760 * Allocate ATA host on success, NULL on failure.
5763 * Inherited from calling layer (may sleep).
5765 struct ata_host *ata_host_alloc(struct device *dev, int max_ports)
5767 struct ata_host *host;
5773 if (!devres_open_group(dev, NULL, GFP_KERNEL))
5776 /* alloc a container for our list of ATA ports (buses) */
5777 sz = sizeof(struct ata_host) + (max_ports + 1) * sizeof(void *);
5778 /* alloc a container for our list of ATA ports (buses) */
5779 host = devres_alloc(ata_host_release, sz, GFP_KERNEL);
5783 devres_add(dev, host);
5784 dev_set_drvdata(dev, host);
5786 spin_lock_init(&host->lock);
5787 mutex_init(&host->eh_mutex);
5789 host->n_ports = max_ports;
5791 /* allocate ports bound to this host */
5792 for (i = 0; i < max_ports; i++) {
5793 struct ata_port *ap;
5795 ap = ata_port_alloc(host);
5800 host->ports[i] = ap;
5803 devres_remove_group(dev, NULL);
5807 devres_release_group(dev, NULL);
5812 * ata_host_alloc_pinfo - alloc host and init with port_info array
5813 * @dev: generic device this host is associated with
5814 * @ppi: array of ATA port_info to initialize host with
5815 * @n_ports: number of ATA ports attached to this host
5817 * Allocate ATA host and initialize with info from @ppi. If NULL
5818 * terminated, @ppi may contain fewer entries than @n_ports. The
5819 * last entry will be used for the remaining ports.
5822 * Allocate ATA host on success, NULL on failure.
5825 * Inherited from calling layer (may sleep).
5827 struct ata_host *ata_host_alloc_pinfo(struct device *dev,
5828 const struct ata_port_info * const * ppi,
5831 const struct ata_port_info *pi;
5832 struct ata_host *host;
5835 host = ata_host_alloc(dev, n_ports);
5839 for (i = 0, j = 0, pi = NULL; i < host->n_ports; i++) {
5840 struct ata_port *ap = host->ports[i];
5845 ap->pio_mask = pi->pio_mask;
5846 ap->mwdma_mask = pi->mwdma_mask;
5847 ap->udma_mask = pi->udma_mask;
5848 ap->flags |= pi->flags;
5849 ap->link.flags |= pi->link_flags;
5850 ap->ops = pi->port_ops;
5852 if (!host->ops && (pi->port_ops != &ata_dummy_port_ops))
5853 host->ops = pi->port_ops;
5860 * ata_slave_link_init - initialize slave link
5861 * @ap: port to initialize slave link for
5863 * Create and initialize slave link for @ap. This enables slave
5864 * link handling on the port.
5866 * In libata, a port contains links and a link contains devices.
5867 * There is single host link but if a PMP is attached to it,
5868 * there can be multiple fan-out links. On SATA, there's usually
5869 * a single device connected to a link but PATA and SATA
5870 * controllers emulating TF based interface can have two - master
5873 * However, there are a few controllers which don't fit into this
5874 * abstraction too well - SATA controllers which emulate TF
5875 * interface with both master and slave devices but also have
5876 * separate SCR register sets for each device. These controllers
5877 * need separate links for physical link handling
5878 * (e.g. onlineness, link speed) but should be treated like a
5879 * traditional M/S controller for everything else (e.g. command
5880 * issue, softreset).
5882 * slave_link is libata's way of handling this class of
5883 * controllers without impacting core layer too much. For
5884 * anything other than physical link handling, the default host
5885 * link is used for both master and slave. For physical link
5886 * handling, separate @ap->slave_link is used. All dirty details
5887 * are implemented inside libata core layer. From LLD's POV, the
5888 * only difference is that prereset, hardreset and postreset are
5889 * called once more for the slave link, so the reset sequence
5890 * looks like the following.
5892 * prereset(M) -> prereset(S) -> hardreset(M) -> hardreset(S) ->
5893 * softreset(M) -> postreset(M) -> postreset(S)
5895 * Note that softreset is called only for the master. Softreset
5896 * resets both M/S by definition, so SRST on master should handle
5897 * both (the standard method will work just fine).
5900 * Should be called before host is registered.
5903 * 0 on success, -errno on failure.
5905 int ata_slave_link_init(struct ata_port *ap)
5907 struct ata_link *link;
5909 WARN_ON(ap->slave_link);
5910 WARN_ON(ap->flags & ATA_FLAG_PMP);
5912 link = kzalloc(sizeof(*link), GFP_KERNEL);
5916 ata_link_init(ap, link, 1);
5917 ap->slave_link = link;
5921 static void ata_host_stop(struct device *gendev, void *res)
5923 struct ata_host *host = dev_get_drvdata(gendev);
5926 WARN_ON(!(host->flags & ATA_HOST_STARTED));
5928 for (i = 0; i < host->n_ports; i++) {
5929 struct ata_port *ap = host->ports[i];
5931 if (ap->ops->port_stop)
5932 ap->ops->port_stop(ap);
5935 if (host->ops->host_stop)
5936 host->ops->host_stop(host);
5940 * ata_finalize_port_ops - finalize ata_port_operations
5941 * @ops: ata_port_operations to finalize
5943 * An ata_port_operations can inherit from another ops and that
5944 * ops can again inherit from another. This can go on as many
5945 * times as necessary as long as there is no loop in the
5946 * inheritance chain.
5948 * Ops tables are finalized when the host is started. NULL or
5949 * unspecified entries are inherited from the closet ancestor
5950 * which has the method and the entry is populated with it.
5951 * After finalization, the ops table directly points to all the
5952 * methods and ->inherits is no longer necessary and cleared.
5954 * Using ATA_OP_NULL, inheriting ops can force a method to NULL.
5959 static void ata_finalize_port_ops(struct ata_port_operations *ops)
5961 static DEFINE_SPINLOCK(lock);
5962 const struct ata_port_operations *cur;
5963 void **begin = (void **)ops;
5964 void **end = (void **)&ops->inherits;
5967 if (!ops || !ops->inherits)
5972 for (cur = ops->inherits; cur; cur = cur->inherits) {
5973 void **inherit = (void **)cur;
5975 for (pp = begin; pp < end; pp++, inherit++)
5980 for (pp = begin; pp < end; pp++)
5984 ops->inherits = NULL;
5990 * ata_host_start - start and freeze ports of an ATA host
5991 * @host: ATA host to start ports for
5993 * Start and then freeze ports of @host. Started status is
5994 * recorded in host->flags, so this function can be called
5995 * multiple times. Ports are guaranteed to get started only
5996 * once. If host->ops isn't initialized yet, its set to the
5997 * first non-dummy port ops.
6000 * Inherited from calling layer (may sleep).
6003 * 0 if all ports are started successfully, -errno otherwise.
6005 int ata_host_start(struct ata_host *host)
6008 void *start_dr = NULL;
6011 if (host->flags & ATA_HOST_STARTED)
6014 ata_finalize_port_ops(host->ops);
6016 for (i = 0; i < host->n_ports; i++) {
6017 struct ata_port *ap = host->ports[i];
6019 ata_finalize_port_ops(ap->ops);
6021 if (!host->ops && !ata_port_is_dummy(ap))
6022 host->ops = ap->ops;
6024 if (ap->ops->port_stop)
6028 if (host->ops->host_stop)
6032 start_dr = devres_alloc(ata_host_stop, 0, GFP_KERNEL);
6037 for (i = 0; i < host->n_ports; i++) {
6038 struct ata_port *ap = host->ports[i];
6040 if (ap->ops->port_start) {
6041 rc = ap->ops->port_start(ap);
6045 "failed to start port %d (errno=%d)\n",
6050 ata_eh_freeze_port(ap);
6054 devres_add(host->dev, start_dr);
6055 host->flags |= ATA_HOST_STARTED;
6060 struct ata_port *ap = host->ports[i];
6062 if (ap->ops->port_stop)
6063 ap->ops->port_stop(ap);
6065 devres_free(start_dr);
6070 * ata_sas_host_init - Initialize a host struct for sas (ipr, libsas)
6071 * @host: host to initialize
6072 * @dev: device host is attached to
6076 void ata_host_init(struct ata_host *host, struct device *dev,
6077 struct ata_port_operations *ops)
6079 spin_lock_init(&host->lock);
6080 mutex_init(&host->eh_mutex);
6081 host->n_tags = ATA_MAX_QUEUE - 1;
6086 void __ata_port_probe(struct ata_port *ap)
6088 struct ata_eh_info *ehi = &ap->link.eh_info;
6089 unsigned long flags;
6091 /* kick EH for boot probing */
6092 spin_lock_irqsave(ap->lock, flags);
6094 ehi->probe_mask |= ATA_ALL_DEVICES;
6095 ehi->action |= ATA_EH_RESET;
6096 ehi->flags |= ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET;
6098 ap->pflags &= ~ATA_PFLAG_INITIALIZING;
6099 ap->pflags |= ATA_PFLAG_LOADING;
6100 ata_port_schedule_eh(ap);
6102 spin_unlock_irqrestore(ap->lock, flags);
6105 int ata_port_probe(struct ata_port *ap)
6109 if (ap->ops->error_handler) {
6110 __ata_port_probe(ap);
6111 ata_port_wait_eh(ap);
6113 DPRINTK("ata%u: bus probe begin\n", ap->print_id);
6114 rc = ata_bus_probe(ap);
6115 DPRINTK("ata%u: bus probe end\n", ap->print_id);
6121 static void async_port_probe(void *data, async_cookie_t cookie)
6123 struct ata_port *ap = data;
6126 * If we're not allowed to scan this host in parallel,
6127 * we need to wait until all previous scans have completed
6128 * before going further.
6129 * Jeff Garzik says this is only within a controller, so we
6130 * don't need to wait for port 0, only for later ports.
6132 if (!(ap->host->flags & ATA_HOST_PARALLEL_SCAN) && ap->port_no != 0)
6133 async_synchronize_cookie(cookie);
6135 (void)ata_port_probe(ap);
6137 /* in order to keep device order, we need to synchronize at this point */
6138 async_synchronize_cookie(cookie);
6140 ata_scsi_scan_host(ap, 1);
6144 * ata_host_register - register initialized ATA host
6145 * @host: ATA host to register
6146 * @sht: template for SCSI host
6148 * Register initialized ATA host. @host is allocated using
6149 * ata_host_alloc() and fully initialized by LLD. This function
6150 * starts ports, registers @host with ATA and SCSI layers and
6151 * probe registered devices.
6154 * Inherited from calling layer (may sleep).
6157 * 0 on success, -errno otherwise.
6159 int ata_host_register(struct ata_host *host, struct scsi_host_template *sht)
6163 host->n_tags = clamp(sht->can_queue, 1, ATA_MAX_QUEUE - 1);
6165 /* host must have been started */
6166 if (!(host->flags & ATA_HOST_STARTED)) {
6167 dev_err(host->dev, "BUG: trying to register unstarted host\n");
6172 /* Blow away unused ports. This happens when LLD can't
6173 * determine the exact number of ports to allocate at
6176 for (i = host->n_ports; host->ports[i]; i++)
6177 kfree(host->ports[i]);
6179 /* give ports names and add SCSI hosts */
6180 for (i = 0; i < host->n_ports; i++)
6181 host->ports[i]->print_id = atomic_inc_return(&ata_print_id);
6184 /* Create associated sysfs transport objects */
6185 for (i = 0; i < host->n_ports; i++) {
6186 rc = ata_tport_add(host->dev,host->ports[i]);
6192 rc = ata_scsi_add_hosts(host, sht);
6196 ata_acpi_hotplug_init(host);
6198 /* set cable, sata_spd_limit and report */
6199 for (i = 0; i < host->n_ports; i++) {
6200 struct ata_port *ap = host->ports[i];
6201 unsigned long xfer_mask;
6203 /* set SATA cable type if still unset */
6204 if (ap->cbl == ATA_CBL_NONE && (ap->flags & ATA_FLAG_SATA))
6205 ap->cbl = ATA_CBL_SATA;
6207 /* init sata_spd_limit to the current value */
6208 sata_link_init_spd(&ap->link);
6210 sata_link_init_spd(ap->slave_link);
6212 /* print per-port info to dmesg */
6213 xfer_mask = ata_pack_xfermask(ap->pio_mask, ap->mwdma_mask,
6216 if (!ata_port_is_dummy(ap)) {
6217 ata_port_info(ap, "%cATA max %s %s\n",
6218 (ap->flags & ATA_FLAG_SATA) ? 'S' : 'P',
6219 ata_mode_string(xfer_mask),
6220 ap->link.eh_info.desc);
6221 ata_ehi_clear_desc(&ap->link.eh_info);
6223 ata_port_info(ap, "DUMMY\n");
6226 /* perform each probe asynchronously */
6227 for (i = 0; i < host->n_ports; i++) {
6228 struct ata_port *ap = host->ports[i];
6229 async_schedule(async_port_probe, ap);
6236 ata_tport_delete(host->ports[i]);
6243 * ata_host_activate - start host, request IRQ and register it
6244 * @host: target ATA host
6245 * @irq: IRQ to request
6246 * @irq_handler: irq_handler used when requesting IRQ
6247 * @irq_flags: irq_flags used when requesting IRQ
6248 * @sht: scsi_host_template to use when registering the host
6250 * After allocating an ATA host and initializing it, most libata
6251 * LLDs perform three steps to activate the host - start host,
6252 * request IRQ and register it. This helper takes necessasry
6253 * arguments and performs the three steps in one go.
6255 * An invalid IRQ skips the IRQ registration and expects the host to
6256 * have set polling mode on the port. In this case, @irq_handler
6260 * Inherited from calling layer (may sleep).
6263 * 0 on success, -errno otherwise.
6265 int ata_host_activate(struct ata_host *host, int irq,
6266 irq_handler_t irq_handler, unsigned long irq_flags,
6267 struct scsi_host_template *sht)
6271 rc = ata_host_start(host);
6275 /* Special case for polling mode */
6277 WARN_ON(irq_handler);
6278 return ata_host_register(host, sht);
6281 rc = devm_request_irq(host->dev, irq, irq_handler, irq_flags,
6282 dev_driver_string(host->dev), host);
6286 for (i = 0; i < host->n_ports; i++)
6287 ata_port_desc(host->ports[i], "irq %d", irq);
6289 rc = ata_host_register(host, sht);
6290 /* if failed, just free the IRQ and leave ports alone */
6292 devm_free_irq(host->dev, irq, host);
6298 * ata_port_detach - Detach ATA port in prepration of device removal
6299 * @ap: ATA port to be detached
6301 * Detach all ATA devices and the associated SCSI devices of @ap;
6302 * then, remove the associated SCSI host. @ap is guaranteed to
6303 * be quiescent on return from this function.
6306 * Kernel thread context (may sleep).
6308 static void ata_port_detach(struct ata_port *ap)
6310 unsigned long flags;
6311 struct ata_link *link;
6312 struct ata_device *dev;
6314 if (!ap->ops->error_handler)
6317 /* tell EH we're leaving & flush EH */
6318 spin_lock_irqsave(ap->lock, flags);
6319 ap->pflags |= ATA_PFLAG_UNLOADING;
6320 ata_port_schedule_eh(ap);
6321 spin_unlock_irqrestore(ap->lock, flags);
6323 /* wait till EH commits suicide */
6324 ata_port_wait_eh(ap);
6326 /* it better be dead now */
6327 WARN_ON(!(ap->pflags & ATA_PFLAG_UNLOADED));
6329 cancel_delayed_work_sync(&ap->hotplug_task);
6332 /* clean up zpodd on port removal */
6333 ata_for_each_link(link, ap, HOST_FIRST) {
6334 ata_for_each_dev(dev, link, ALL) {
6335 if (zpodd_dev_enabled(dev))
6341 for (i = 0; i < SATA_PMP_MAX_PORTS; i++)
6342 ata_tlink_delete(&ap->pmp_link[i]);
6344 ata_tport_delete(ap);
6346 /* remove the associated SCSI host */
6347 scsi_remove_host(ap->scsi_host);
6351 * ata_host_detach - Detach all ports of an ATA host
6352 * @host: Host to detach
6354 * Detach all ports of @host.
6357 * Kernel thread context (may sleep).
6359 void ata_host_detach(struct ata_host *host)
6363 for (i = 0; i < host->n_ports; i++)
6364 ata_port_detach(host->ports[i]);
6366 /* the host is dead now, dissociate ACPI */
6367 ata_acpi_dissociate(host);
6373 * ata_pci_remove_one - PCI layer callback for device removal
6374 * @pdev: PCI device that was removed
6376 * PCI layer indicates to libata via this hook that hot-unplug or
6377 * module unload event has occurred. Detach all ports. Resource
6378 * release is handled via devres.
6381 * Inherited from PCI layer (may sleep).
6383 void ata_pci_remove_one(struct pci_dev *pdev)
6385 struct ata_host *host = pci_get_drvdata(pdev);
6387 ata_host_detach(host);
6390 /* move to PCI subsystem */
6391 int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits)
6393 unsigned long tmp = 0;
6395 switch (bits->width) {
6398 pci_read_config_byte(pdev, bits->reg, &tmp8);
6404 pci_read_config_word(pdev, bits->reg, &tmp16);
6410 pci_read_config_dword(pdev, bits->reg, &tmp32);
6421 return (tmp == bits->val) ? 1 : 0;
6425 void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg)
6427 pci_save_state(pdev);
6428 pci_disable_device(pdev);
6430 if (mesg.event & PM_EVENT_SLEEP)
6431 pci_set_power_state(pdev, PCI_D3hot);
6434 int ata_pci_device_do_resume(struct pci_dev *pdev)
6438 pci_set_power_state(pdev, PCI_D0);
6439 pci_restore_state(pdev);
6441 rc = pcim_enable_device(pdev);
6444 "failed to enable device after resume (%d)\n", rc);
6448 pci_set_master(pdev);
6452 int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg)
6454 struct ata_host *host = pci_get_drvdata(pdev);
6457 rc = ata_host_suspend(host, mesg);
6461 ata_pci_device_do_suspend(pdev, mesg);
6466 int ata_pci_device_resume(struct pci_dev *pdev)
6468 struct ata_host *host = pci_get_drvdata(pdev);
6471 rc = ata_pci_device_do_resume(pdev);
6473 ata_host_resume(host);
6476 #endif /* CONFIG_PM */
6478 #endif /* CONFIG_PCI */
6481 * ata_platform_remove_one - Platform layer callback for device removal
6482 * @pdev: Platform device that was removed
6484 * Platform layer indicates to libata via this hook that hot-unplug or
6485 * module unload event has occurred. Detach all ports. Resource
6486 * release is handled via devres.
6489 * Inherited from platform layer (may sleep).
6491 int ata_platform_remove_one(struct platform_device *pdev)
6493 struct ata_host *host = platform_get_drvdata(pdev);
6495 ata_host_detach(host);
6500 static int __init ata_parse_force_one(char **cur,
6501 struct ata_force_ent *force_ent,
6502 const char **reason)
6504 /* FIXME: Currently, there's no way to tag init const data and
6505 * using __initdata causes build failure on some versions of
6506 * gcc. Once __initdataconst is implemented, add const to the
6507 * following structure.
6509 static struct ata_force_param force_tbl[] __initdata = {
6510 { "40c", .cbl = ATA_CBL_PATA40 },
6511 { "80c", .cbl = ATA_CBL_PATA80 },
6512 { "short40c", .cbl = ATA_CBL_PATA40_SHORT },
6513 { "unk", .cbl = ATA_CBL_PATA_UNK },
6514 { "ign", .cbl = ATA_CBL_PATA_IGN },
6515 { "sata", .cbl = ATA_CBL_SATA },
6516 { "1.5Gbps", .spd_limit = 1 },
6517 { "3.0Gbps", .spd_limit = 2 },
6518 { "noncq", .horkage_on = ATA_HORKAGE_NONCQ },
6519 { "ncq", .horkage_off = ATA_HORKAGE_NONCQ },
6520 { "dump_id", .horkage_on = ATA_HORKAGE_DUMP_ID },
6521 { "pio0", .xfer_mask = 1 << (ATA_SHIFT_PIO + 0) },
6522 { "pio1", .xfer_mask = 1 << (ATA_SHIFT_PIO + 1) },
6523 { "pio2", .xfer_mask = 1 << (ATA_SHIFT_PIO + 2) },
6524 { "pio3", .xfer_mask = 1 << (ATA_SHIFT_PIO + 3) },
6525 { "pio4", .xfer_mask = 1 << (ATA_SHIFT_PIO + 4) },
6526 { "pio5", .xfer_mask = 1 << (ATA_SHIFT_PIO + 5) },
6527 { "pio6", .xfer_mask = 1 << (ATA_SHIFT_PIO + 6) },
6528 { "mwdma0", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 0) },
6529 { "mwdma1", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 1) },
6530 { "mwdma2", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 2) },
6531 { "mwdma3", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 3) },
6532 { "mwdma4", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 4) },
6533 { "udma0", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 0) },
6534 { "udma16", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 0) },
6535 { "udma/16", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 0) },
6536 { "udma1", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 1) },
6537 { "udma25", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 1) },
6538 { "udma/25", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 1) },
6539 { "udma2", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 2) },
6540 { "udma33", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 2) },
6541 { "udma/33", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 2) },
6542 { "udma3", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 3) },
6543 { "udma44", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 3) },
6544 { "udma/44", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 3) },
6545 { "udma4", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 4) },
6546 { "udma66", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 4) },
6547 { "udma/66", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 4) },
6548 { "udma5", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 5) },
6549 { "udma100", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 5) },
6550 { "udma/100", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 5) },
6551 { "udma6", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 6) },
6552 { "udma133", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 6) },
6553 { "udma/133", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 6) },
6554 { "udma7", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 7) },
6555 { "nohrst", .lflags = ATA_LFLAG_NO_HRST },
6556 { "nosrst", .lflags = ATA_LFLAG_NO_SRST },
6557 { "norst", .lflags = ATA_LFLAG_NO_HRST | ATA_LFLAG_NO_SRST },
6558 { "rstonce", .lflags = ATA_LFLAG_RST_ONCE },
6559 { "atapi_dmadir", .horkage_on = ATA_HORKAGE_ATAPI_DMADIR },
6560 { "disable", .horkage_on = ATA_HORKAGE_DISABLE },
6562 char *start = *cur, *p = *cur;
6563 char *id, *val, *endp;
6564 const struct ata_force_param *match_fp = NULL;
6565 int nr_matches = 0, i;
6567 /* find where this param ends and update *cur */
6568 while (*p != '\0' && *p != ',')
6579 p = strchr(start, ':');
6581 val = strstrip(start);
6586 id = strstrip(start);
6587 val = strstrip(p + 1);
6590 p = strchr(id, '.');
6593 force_ent->device = simple_strtoul(p, &endp, 10);
6594 if (p == endp || *endp != '\0') {
6595 *reason = "invalid device";
6600 force_ent->port = simple_strtoul(id, &endp, 10);
6601 if (p == endp || *endp != '\0') {
6602 *reason = "invalid port/link";
6607 /* parse val, allow shortcuts so that both 1.5 and 1.5Gbps work */
6608 for (i = 0; i < ARRAY_SIZE(force_tbl); i++) {
6609 const struct ata_force_param *fp = &force_tbl[i];
6611 if (strncasecmp(val, fp->name, strlen(val)))
6617 if (strcasecmp(val, fp->name) == 0) {
6624 *reason = "unknown value";
6627 if (nr_matches > 1) {
6628 *reason = "ambigious value";
6632 force_ent->param = *match_fp;
6637 static void __init ata_parse_force_param(void)
6639 int idx = 0, size = 1;
6640 int last_port = -1, last_device = -1;
6641 char *p, *cur, *next;
6643 /* calculate maximum number of params and allocate force_tbl */
6644 for (p = ata_force_param_buf; *p; p++)
6648 ata_force_tbl = kzalloc(sizeof(ata_force_tbl[0]) * size, GFP_KERNEL);
6649 if (!ata_force_tbl) {
6650 printk(KERN_WARNING "ata: failed to extend force table, "
6651 "libata.force ignored\n");
6655 /* parse and populate the table */
6656 for (cur = ata_force_param_buf; *cur != '\0'; cur = next) {
6657 const char *reason = "";
6658 struct ata_force_ent te = { .port = -1, .device = -1 };
6661 if (ata_parse_force_one(&next, &te, &reason)) {
6662 printk(KERN_WARNING "ata: failed to parse force "
6663 "parameter \"%s\" (%s)\n",
6668 if (te.port == -1) {
6669 te.port = last_port;
6670 te.device = last_device;
6673 ata_force_tbl[idx++] = te;
6675 last_port = te.port;
6676 last_device = te.device;
6679 ata_force_tbl_size = idx;
6682 static int __init ata_init(void)
6686 ata_parse_force_param();
6688 ata_acpi_register();
6690 rc = ata_sff_init();
6692 kfree(ata_force_tbl);
6696 libata_transport_init();
6697 ata_scsi_transport_template = ata_attach_transport();
6698 if (!ata_scsi_transport_template) {
6704 printk(KERN_DEBUG "libata version " DRV_VERSION " loaded.\n");
6711 static void __exit ata_exit(void)
6713 ata_release_transport(ata_scsi_transport_template);
6714 libata_transport_exit();
6716 ata_acpi_unregister();
6717 kfree(ata_force_tbl);
6720 subsys_initcall(ata_init);
6721 module_exit(ata_exit);
6723 static DEFINE_RATELIMIT_STATE(ratelimit, HZ / 5, 1);
6725 int ata_ratelimit(void)
6727 return __ratelimit(&ratelimit);
6731 * ata_msleep - ATA EH owner aware msleep
6732 * @ap: ATA port to attribute the sleep to
6733 * @msecs: duration to sleep in milliseconds
6735 * Sleeps @msecs. If the current task is owner of @ap's EH, the
6736 * ownership is released before going to sleep and reacquired
6737 * after the sleep is complete. IOW, other ports sharing the
6738 * @ap->host will be allowed to own the EH while this task is
6744 void ata_msleep(struct ata_port *ap, unsigned int msecs)
6746 bool owns_eh = ap && ap->host->eh_owner == current;
6758 * ata_wait_register - wait until register value changes
6759 * @ap: ATA port to wait register for, can be NULL
6760 * @reg: IO-mapped register
6761 * @mask: Mask to apply to read register value
6762 * @val: Wait condition
6763 * @interval: polling interval in milliseconds
6764 * @timeout: timeout in milliseconds
6766 * Waiting for some bits of register to change is a common
6767 * operation for ATA controllers. This function reads 32bit LE
6768 * IO-mapped register @reg and tests for the following condition.
6770 * (*@reg & mask) != val
6772 * If the condition is met, it returns; otherwise, the process is
6773 * repeated after @interval_msec until timeout.
6776 * Kernel thread context (may sleep)
6779 * The final register value.
6781 u32 ata_wait_register(struct ata_port *ap, void __iomem *reg, u32 mask, u32 val,
6782 unsigned long interval, unsigned long timeout)
6784 unsigned long deadline;
6787 tmp = ioread32(reg);
6789 /* Calculate timeout _after_ the first read to make sure
6790 * preceding writes reach the controller before starting to
6791 * eat away the timeout.
6793 deadline = ata_deadline(jiffies, timeout);
6795 while ((tmp & mask) == val && time_before(jiffies, deadline)) {
6796 ata_msleep(ap, interval);
6797 tmp = ioread32(reg);
6806 static unsigned int ata_dummy_qc_issue(struct ata_queued_cmd *qc)
6808 return AC_ERR_SYSTEM;
6811 static void ata_dummy_error_handler(struct ata_port *ap)
6816 struct ata_port_operations ata_dummy_port_ops = {
6817 .qc_prep = ata_noop_qc_prep,
6818 .qc_issue = ata_dummy_qc_issue,
6819 .error_handler = ata_dummy_error_handler,
6820 .sched_eh = ata_std_sched_eh,
6821 .end_eh = ata_std_end_eh,
6824 const struct ata_port_info ata_dummy_port_info = {
6825 .port_ops = &ata_dummy_port_ops,
6829 * Utility print functions
6831 int ata_port_printk(const struct ata_port *ap, const char *level,
6832 const char *fmt, ...)
6834 struct va_format vaf;
6838 va_start(args, fmt);
6843 r = printk("%sata%u: %pV", level, ap->print_id, &vaf);
6849 EXPORT_SYMBOL(ata_port_printk);
6851 int ata_link_printk(const struct ata_link *link, const char *level,
6852 const char *fmt, ...)
6854 struct va_format vaf;
6858 va_start(args, fmt);
6863 if (sata_pmp_attached(link->ap) || link->ap->slave_link)
6864 r = printk("%sata%u.%02u: %pV",
6865 level, link->ap->print_id, link->pmp, &vaf);
6867 r = printk("%sata%u: %pV",
6868 level, link->ap->print_id, &vaf);
6874 EXPORT_SYMBOL(ata_link_printk);
6876 int ata_dev_printk(const struct ata_device *dev, const char *level,
6877 const char *fmt, ...)
6879 struct va_format vaf;
6883 va_start(args, fmt);
6888 r = printk("%sata%u.%02u: %pV",
6889 level, dev->link->ap->print_id, dev->link->pmp + dev->devno,
6896 EXPORT_SYMBOL(ata_dev_printk);
6898 void ata_print_version(const struct device *dev, const char *version)
6900 dev_printk(KERN_DEBUG, dev, "version %s\n", version);
6902 EXPORT_SYMBOL(ata_print_version);
6905 * libata is essentially a library of internal helper functions for
6906 * low-level ATA host controller drivers. As such, the API/ABI is
6907 * likely to change as new drivers are added and updated.
6908 * Do not depend on ABI/API stability.
6910 EXPORT_SYMBOL_GPL(sata_deb_timing_normal);
6911 EXPORT_SYMBOL_GPL(sata_deb_timing_hotplug);
6912 EXPORT_SYMBOL_GPL(sata_deb_timing_long);
6913 EXPORT_SYMBOL_GPL(ata_base_port_ops);
6914 EXPORT_SYMBOL_GPL(sata_port_ops);
6915 EXPORT_SYMBOL_GPL(ata_dummy_port_ops);
6916 EXPORT_SYMBOL_GPL(ata_dummy_port_info);
6917 EXPORT_SYMBOL_GPL(ata_link_next);
6918 EXPORT_SYMBOL_GPL(ata_dev_next);
6919 EXPORT_SYMBOL_GPL(ata_std_bios_param);
6920 EXPORT_SYMBOL_GPL(ata_scsi_unlock_native_capacity);
6921 EXPORT_SYMBOL_GPL(ata_host_init);
6922 EXPORT_SYMBOL_GPL(ata_host_alloc);
6923 EXPORT_SYMBOL_GPL(ata_host_alloc_pinfo);
6924 EXPORT_SYMBOL_GPL(ata_slave_link_init);
6925 EXPORT_SYMBOL_GPL(ata_host_start);
6926 EXPORT_SYMBOL_GPL(ata_host_register);
6927 EXPORT_SYMBOL_GPL(ata_host_activate);
6928 EXPORT_SYMBOL_GPL(ata_host_detach);
6929 EXPORT_SYMBOL_GPL(ata_sg_init);
6930 EXPORT_SYMBOL_GPL(ata_qc_complete);
6931 EXPORT_SYMBOL_GPL(ata_qc_complete_multiple);
6932 EXPORT_SYMBOL_GPL(atapi_cmd_type);
6933 EXPORT_SYMBOL_GPL(ata_tf_to_fis);
6934 EXPORT_SYMBOL_GPL(ata_tf_from_fis);
6935 EXPORT_SYMBOL_GPL(ata_pack_xfermask);
6936 EXPORT_SYMBOL_GPL(ata_unpack_xfermask);
6937 EXPORT_SYMBOL_GPL(ata_xfer_mask2mode);
6938 EXPORT_SYMBOL_GPL(ata_xfer_mode2mask);
6939 EXPORT_SYMBOL_GPL(ata_xfer_mode2shift);
6940 EXPORT_SYMBOL_GPL(ata_mode_string);
6941 EXPORT_SYMBOL_GPL(ata_id_xfermask);
6942 EXPORT_SYMBOL_GPL(ata_do_set_mode);
6943 EXPORT_SYMBOL_GPL(ata_std_qc_defer);
6944 EXPORT_SYMBOL_GPL(ata_noop_qc_prep);
6945 EXPORT_SYMBOL_GPL(ata_dev_disable);
6946 EXPORT_SYMBOL_GPL(sata_set_spd);
6947 EXPORT_SYMBOL_GPL(ata_wait_after_reset);
6948 EXPORT_SYMBOL_GPL(sata_link_debounce);
6949 EXPORT_SYMBOL_GPL(sata_link_resume);
6950 EXPORT_SYMBOL_GPL(sata_link_scr_lpm);
6951 EXPORT_SYMBOL_GPL(ata_std_prereset);
6952 EXPORT_SYMBOL_GPL(sata_link_hardreset);
6953 EXPORT_SYMBOL_GPL(sata_std_hardreset);
6954 EXPORT_SYMBOL_GPL(ata_std_postreset);
6955 EXPORT_SYMBOL_GPL(ata_dev_classify);
6956 EXPORT_SYMBOL_GPL(ata_dev_pair);
6957 EXPORT_SYMBOL_GPL(ata_ratelimit);
6958 EXPORT_SYMBOL_GPL(ata_msleep);
6959 EXPORT_SYMBOL_GPL(ata_wait_register);
6960 EXPORT_SYMBOL_GPL(ata_scsi_queuecmd);
6961 EXPORT_SYMBOL_GPL(ata_scsi_slave_config);
6962 EXPORT_SYMBOL_GPL(ata_scsi_slave_destroy);
6963 EXPORT_SYMBOL_GPL(ata_scsi_change_queue_depth);
6964 EXPORT_SYMBOL_GPL(__ata_change_queue_depth);
6965 EXPORT_SYMBOL_GPL(sata_scr_valid);
6966 EXPORT_SYMBOL_GPL(sata_scr_read);
6967 EXPORT_SYMBOL_GPL(sata_scr_write);
6968 EXPORT_SYMBOL_GPL(sata_scr_write_flush);
6969 EXPORT_SYMBOL_GPL(ata_link_online);
6970 EXPORT_SYMBOL_GPL(ata_link_offline);
6972 EXPORT_SYMBOL_GPL(ata_host_suspend);
6973 EXPORT_SYMBOL_GPL(ata_host_resume);
6974 #endif /* CONFIG_PM */
6975 EXPORT_SYMBOL_GPL(ata_id_string);
6976 EXPORT_SYMBOL_GPL(ata_id_c_string);
6977 EXPORT_SYMBOL_GPL(ata_do_dev_read_id);
6978 EXPORT_SYMBOL_GPL(ata_scsi_simulate);
6980 EXPORT_SYMBOL_GPL(ata_pio_need_iordy);
6981 EXPORT_SYMBOL_GPL(ata_timing_find_mode);
6982 EXPORT_SYMBOL_GPL(ata_timing_compute);
6983 EXPORT_SYMBOL_GPL(ata_timing_merge);
6984 EXPORT_SYMBOL_GPL(ata_timing_cycle2mode);
6987 EXPORT_SYMBOL_GPL(pci_test_config_bits);
6988 EXPORT_SYMBOL_GPL(ata_pci_remove_one);
6990 EXPORT_SYMBOL_GPL(ata_pci_device_do_suspend);
6991 EXPORT_SYMBOL_GPL(ata_pci_device_do_resume);
6992 EXPORT_SYMBOL_GPL(ata_pci_device_suspend);
6993 EXPORT_SYMBOL_GPL(ata_pci_device_resume);
6994 #endif /* CONFIG_PM */
6995 #endif /* CONFIG_PCI */
6997 EXPORT_SYMBOL_GPL(ata_platform_remove_one);
6999 EXPORT_SYMBOL_GPL(__ata_ehi_push_desc);
7000 EXPORT_SYMBOL_GPL(ata_ehi_push_desc);
7001 EXPORT_SYMBOL_GPL(ata_ehi_clear_desc);
7002 EXPORT_SYMBOL_GPL(ata_port_desc);
7004 EXPORT_SYMBOL_GPL(ata_port_pbar_desc);
7005 #endif /* CONFIG_PCI */
7006 EXPORT_SYMBOL_GPL(ata_port_schedule_eh);
7007 EXPORT_SYMBOL_GPL(ata_link_abort);
7008 EXPORT_SYMBOL_GPL(ata_port_abort);
7009 EXPORT_SYMBOL_GPL(ata_port_freeze);
7010 EXPORT_SYMBOL_GPL(sata_async_notification);
7011 EXPORT_SYMBOL_GPL(ata_eh_freeze_port);
7012 EXPORT_SYMBOL_GPL(ata_eh_thaw_port);
7013 EXPORT_SYMBOL_GPL(ata_eh_qc_complete);
7014 EXPORT_SYMBOL_GPL(ata_eh_qc_retry);
7015 EXPORT_SYMBOL_GPL(ata_eh_analyze_ncq_error);
7016 EXPORT_SYMBOL_GPL(ata_do_eh);
7017 EXPORT_SYMBOL_GPL(ata_std_error_handler);
7019 EXPORT_SYMBOL_GPL(ata_cable_40wire);
7020 EXPORT_SYMBOL_GPL(ata_cable_80wire);
7021 EXPORT_SYMBOL_GPL(ata_cable_unknown);
7022 EXPORT_SYMBOL_GPL(ata_cable_ignore);
7023 EXPORT_SYMBOL_GPL(ata_cable_sata);