2 * libata-core.c - helper library for ATA
4 * Maintained by: Jeff Garzik <jgarzik@pobox.com>
5 * Please ALWAYS copy linux-ide@vger.kernel.org
8 * Copyright 2003-2004 Red Hat, Inc. All rights reserved.
9 * Copyright 2003-2004 Jeff Garzik
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2, or (at your option)
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; see the file COPYING. If not, write to
24 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
27 * libata documentation is available via 'make {ps|pdf}docs',
28 * as Documentation/DocBook/libata.*
30 * Hardware documentation available from http://www.t13.org/ and
31 * http://www.sata-io.org/
33 * Standards documents from:
34 * http://www.t13.org (ATA standards, PCI DMA IDE spec)
35 * http://www.t10.org (SCSI MMC - for ATAPI MMC)
36 * http://www.sata-io.org (SATA)
37 * http://www.compactflash.org (CF)
38 * http://www.qic.org (QIC157 - Tape and DSC)
39 * http://www.ce-ata.org (CE-ATA: not supported)
43 #include <linux/kernel.h>
44 #include <linux/module.h>
45 #include <linux/pci.h>
46 #include <linux/init.h>
47 #include <linux/list.h>
49 #include <linux/spinlock.h>
50 #include <linux/blkdev.h>
51 #include <linux/delay.h>
52 #include <linux/timer.h>
53 #include <linux/interrupt.h>
54 #include <linux/completion.h>
55 #include <linux/suspend.h>
56 #include <linux/workqueue.h>
57 #include <linux/scatterlist.h>
59 #include <linux/async.h>
60 #include <linux/log2.h>
61 #include <linux/slab.h>
62 #include <scsi/scsi.h>
63 #include <scsi/scsi_cmnd.h>
64 #include <scsi/scsi_host.h>
65 #include <linux/libata.h>
66 #include <asm/byteorder.h>
67 #include <linux/cdrom.h>
68 #include <linux/ratelimit.h>
69 #include <linux/pm_runtime.h>
72 #include "libata-transport.h"
74 /* debounce timing parameters in msecs { interval, duration, timeout } */
75 const unsigned long sata_deb_timing_normal[] = { 5, 100, 2000 };
76 const unsigned long sata_deb_timing_hotplug[] = { 25, 500, 2000 };
77 const unsigned long sata_deb_timing_long[] = { 100, 2000, 5000 };
79 const struct ata_port_operations ata_base_port_ops = {
80 .prereset = ata_std_prereset,
81 .postreset = ata_std_postreset,
82 .error_handler = ata_std_error_handler,
83 .sched_eh = ata_std_sched_eh,
84 .end_eh = ata_std_end_eh,
87 const struct ata_port_operations sata_port_ops = {
88 .inherits = &ata_base_port_ops,
90 .qc_defer = ata_std_qc_defer,
91 .hardreset = sata_std_hardreset,
94 static unsigned int ata_dev_init_params(struct ata_device *dev,
95 u16 heads, u16 sectors);
96 static unsigned int ata_dev_set_xfermode(struct ata_device *dev);
97 static void ata_dev_xfermask(struct ata_device *dev);
98 static unsigned long ata_dev_blacklisted(const struct ata_device *dev);
100 atomic_t ata_print_id = ATOMIC_INIT(0);
102 struct ata_force_param {
106 unsigned long xfer_mask;
107 unsigned int horkage_on;
108 unsigned int horkage_off;
112 struct ata_force_ent {
115 struct ata_force_param param;
118 static struct ata_force_ent *ata_force_tbl;
119 static int ata_force_tbl_size;
121 static char ata_force_param_buf[PAGE_SIZE] __initdata;
122 /* param_buf is thrown away after initialization, disallow read */
123 module_param_string(force, ata_force_param_buf, sizeof(ata_force_param_buf), 0);
124 MODULE_PARM_DESC(force, "Force ATA configurations including cable type, link speed and transfer mode (see Documentation/kernel-parameters.txt for details)");
126 static int atapi_enabled = 1;
127 module_param(atapi_enabled, int, 0444);
128 MODULE_PARM_DESC(atapi_enabled, "Enable discovery of ATAPI devices (0=off, 1=on [default])");
130 static int atapi_dmadir = 0;
131 module_param(atapi_dmadir, int, 0444);
132 MODULE_PARM_DESC(atapi_dmadir, "Enable ATAPI DMADIR bridge support (0=off [default], 1=on)");
134 int atapi_passthru16 = 1;
135 module_param(atapi_passthru16, int, 0444);
136 MODULE_PARM_DESC(atapi_passthru16, "Enable ATA_16 passthru for ATAPI devices (0=off, 1=on [default])");
139 module_param_named(fua, libata_fua, int, 0444);
140 MODULE_PARM_DESC(fua, "FUA support (0=off [default], 1=on)");
142 static int ata_ignore_hpa;
143 module_param_named(ignore_hpa, ata_ignore_hpa, int, 0644);
144 MODULE_PARM_DESC(ignore_hpa, "Ignore HPA limit (0=keep BIOS limits, 1=ignore limits, using full disk)");
146 static int libata_dma_mask = ATA_DMA_MASK_ATA|ATA_DMA_MASK_ATAPI|ATA_DMA_MASK_CFA;
147 module_param_named(dma, libata_dma_mask, int, 0444);
148 MODULE_PARM_DESC(dma, "DMA enable/disable (0x1==ATA, 0x2==ATAPI, 0x4==CF)");
150 static int ata_probe_timeout;
151 module_param(ata_probe_timeout, int, 0444);
152 MODULE_PARM_DESC(ata_probe_timeout, "Set ATA probing timeout (seconds)");
154 int libata_noacpi = 0;
155 module_param_named(noacpi, libata_noacpi, int, 0444);
156 MODULE_PARM_DESC(noacpi, "Disable the use of ACPI in probe/suspend/resume (0=off [default], 1=on)");
158 int libata_allow_tpm = 0;
159 module_param_named(allow_tpm, libata_allow_tpm, int, 0444);
160 MODULE_PARM_DESC(allow_tpm, "Permit the use of TPM commands (0=off [default], 1=on)");
163 module_param(atapi_an, int, 0444);
164 MODULE_PARM_DESC(atapi_an, "Enable ATAPI AN media presence notification (0=0ff [default], 1=on)");
166 MODULE_AUTHOR("Jeff Garzik");
167 MODULE_DESCRIPTION("Library module for ATA devices");
168 MODULE_LICENSE("GPL");
169 MODULE_VERSION(DRV_VERSION);
172 static bool ata_sstatus_online(u32 sstatus)
174 return (sstatus & 0xf) == 0x3;
178 * ata_link_next - link iteration helper
179 * @link: the previous link, NULL to start
180 * @ap: ATA port containing links to iterate
181 * @mode: iteration mode, one of ATA_LITER_*
184 * Host lock or EH context.
187 * Pointer to the next link.
189 struct ata_link *ata_link_next(struct ata_link *link, struct ata_port *ap,
190 enum ata_link_iter_mode mode)
192 BUG_ON(mode != ATA_LITER_EDGE &&
193 mode != ATA_LITER_PMP_FIRST && mode != ATA_LITER_HOST_FIRST);
195 /* NULL link indicates start of iteration */
199 case ATA_LITER_PMP_FIRST:
200 if (sata_pmp_attached(ap))
203 case ATA_LITER_HOST_FIRST:
207 /* we just iterated over the host link, what's next? */
208 if (link == &ap->link)
210 case ATA_LITER_HOST_FIRST:
211 if (sata_pmp_attached(ap))
214 case ATA_LITER_PMP_FIRST:
215 if (unlikely(ap->slave_link))
216 return ap->slave_link;
222 /* slave_link excludes PMP */
223 if (unlikely(link == ap->slave_link))
226 /* we were over a PMP link */
227 if (++link < ap->pmp_link + ap->nr_pmp_links)
230 if (mode == ATA_LITER_PMP_FIRST)
237 * ata_dev_next - device iteration helper
238 * @dev: the previous device, NULL to start
239 * @link: ATA link containing devices to iterate
240 * @mode: iteration mode, one of ATA_DITER_*
243 * Host lock or EH context.
246 * Pointer to the next device.
248 struct ata_device *ata_dev_next(struct ata_device *dev, struct ata_link *link,
249 enum ata_dev_iter_mode mode)
251 BUG_ON(mode != ATA_DITER_ENABLED && mode != ATA_DITER_ENABLED_REVERSE &&
252 mode != ATA_DITER_ALL && mode != ATA_DITER_ALL_REVERSE);
254 /* NULL dev indicates start of iteration */
257 case ATA_DITER_ENABLED:
261 case ATA_DITER_ENABLED_REVERSE:
262 case ATA_DITER_ALL_REVERSE:
263 dev = link->device + ata_link_max_devices(link) - 1;
268 /* move to the next one */
270 case ATA_DITER_ENABLED:
272 if (++dev < link->device + ata_link_max_devices(link))
275 case ATA_DITER_ENABLED_REVERSE:
276 case ATA_DITER_ALL_REVERSE:
277 if (--dev >= link->device)
283 if ((mode == ATA_DITER_ENABLED || mode == ATA_DITER_ENABLED_REVERSE) &&
284 !ata_dev_enabled(dev))
290 * ata_dev_phys_link - find physical link for a device
291 * @dev: ATA device to look up physical link for
293 * Look up physical link which @dev is attached to. Note that
294 * this is different from @dev->link only when @dev is on slave
295 * link. For all other cases, it's the same as @dev->link.
301 * Pointer to the found physical link.
303 struct ata_link *ata_dev_phys_link(struct ata_device *dev)
305 struct ata_port *ap = dev->link->ap;
311 return ap->slave_link;
315 * ata_force_cbl - force cable type according to libata.force
316 * @ap: ATA port of interest
318 * Force cable type according to libata.force and whine about it.
319 * The last entry which has matching port number is used, so it
320 * can be specified as part of device force parameters. For
321 * example, both "a:40c,1.00:udma4" and "1.00:40c,udma4" have the
327 void ata_force_cbl(struct ata_port *ap)
331 for (i = ata_force_tbl_size - 1; i >= 0; i--) {
332 const struct ata_force_ent *fe = &ata_force_tbl[i];
334 if (fe->port != -1 && fe->port != ap->print_id)
337 if (fe->param.cbl == ATA_CBL_NONE)
340 ap->cbl = fe->param.cbl;
341 ata_port_notice(ap, "FORCE: cable set to %s\n", fe->param.name);
347 * ata_force_link_limits - force link limits according to libata.force
348 * @link: ATA link of interest
350 * Force link flags and SATA spd limit according to libata.force
351 * and whine about it. When only the port part is specified
352 * (e.g. 1:), the limit applies to all links connected to both
353 * the host link and all fan-out ports connected via PMP. If the
354 * device part is specified as 0 (e.g. 1.00:), it specifies the
355 * first fan-out link not the host link. Device number 15 always
356 * points to the host link whether PMP is attached or not. If the
357 * controller has slave link, device number 16 points to it.
362 static void ata_force_link_limits(struct ata_link *link)
364 bool did_spd = false;
365 int linkno = link->pmp;
368 if (ata_is_host_link(link))
371 for (i = ata_force_tbl_size - 1; i >= 0; i--) {
372 const struct ata_force_ent *fe = &ata_force_tbl[i];
374 if (fe->port != -1 && fe->port != link->ap->print_id)
377 if (fe->device != -1 && fe->device != linkno)
380 /* only honor the first spd limit */
381 if (!did_spd && fe->param.spd_limit) {
382 link->hw_sata_spd_limit = (1 << fe->param.spd_limit) - 1;
383 ata_link_notice(link, "FORCE: PHY spd limit set to %s\n",
388 /* let lflags stack */
389 if (fe->param.lflags) {
390 link->flags |= fe->param.lflags;
391 ata_link_notice(link,
392 "FORCE: link flag 0x%x forced -> 0x%x\n",
393 fe->param.lflags, link->flags);
399 * ata_force_xfermask - force xfermask according to libata.force
400 * @dev: ATA device of interest
402 * Force xfer_mask according to libata.force and whine about it.
403 * For consistency with link selection, device number 15 selects
404 * the first device connected to the host link.
409 static void ata_force_xfermask(struct ata_device *dev)
411 int devno = dev->link->pmp + dev->devno;
412 int alt_devno = devno;
415 /* allow n.15/16 for devices attached to host port */
416 if (ata_is_host_link(dev->link))
419 for (i = ata_force_tbl_size - 1; i >= 0; i--) {
420 const struct ata_force_ent *fe = &ata_force_tbl[i];
421 unsigned long pio_mask, mwdma_mask, udma_mask;
423 if (fe->port != -1 && fe->port != dev->link->ap->print_id)
426 if (fe->device != -1 && fe->device != devno &&
427 fe->device != alt_devno)
430 if (!fe->param.xfer_mask)
433 ata_unpack_xfermask(fe->param.xfer_mask,
434 &pio_mask, &mwdma_mask, &udma_mask);
436 dev->udma_mask = udma_mask;
437 else if (mwdma_mask) {
439 dev->mwdma_mask = mwdma_mask;
443 dev->pio_mask = pio_mask;
446 ata_dev_notice(dev, "FORCE: xfer_mask set to %s\n",
453 * ata_force_horkage - force horkage according to libata.force
454 * @dev: ATA device of interest
456 * Force horkage according to libata.force and whine about it.
457 * For consistency with link selection, device number 15 selects
458 * the first device connected to the host link.
463 static void ata_force_horkage(struct ata_device *dev)
465 int devno = dev->link->pmp + dev->devno;
466 int alt_devno = devno;
469 /* allow n.15/16 for devices attached to host port */
470 if (ata_is_host_link(dev->link))
473 for (i = 0; i < ata_force_tbl_size; i++) {
474 const struct ata_force_ent *fe = &ata_force_tbl[i];
476 if (fe->port != -1 && fe->port != dev->link->ap->print_id)
479 if (fe->device != -1 && fe->device != devno &&
480 fe->device != alt_devno)
483 if (!(~dev->horkage & fe->param.horkage_on) &&
484 !(dev->horkage & fe->param.horkage_off))
487 dev->horkage |= fe->param.horkage_on;
488 dev->horkage &= ~fe->param.horkage_off;
490 ata_dev_notice(dev, "FORCE: horkage modified (%s)\n",
496 * atapi_cmd_type - Determine ATAPI command type from SCSI opcode
497 * @opcode: SCSI opcode
499 * Determine ATAPI command type from @opcode.
505 * ATAPI_{READ|WRITE|READ_CD|PASS_THRU|MISC}
507 int atapi_cmd_type(u8 opcode)
516 case GPCMD_WRITE_AND_VERIFY_10:
520 case GPCMD_READ_CD_MSF:
521 return ATAPI_READ_CD;
525 if (atapi_passthru16)
526 return ATAPI_PASS_THRU;
534 * ata_tf_to_fis - Convert ATA taskfile to SATA FIS structure
535 * @tf: Taskfile to convert
536 * @pmp: Port multiplier port
537 * @is_cmd: This FIS is for command
538 * @fis: Buffer into which data will output
540 * Converts a standard ATA taskfile to a Serial ATA
541 * FIS structure (Register - Host to Device).
544 * Inherited from caller.
546 void ata_tf_to_fis(const struct ata_taskfile *tf, u8 pmp, int is_cmd, u8 *fis)
548 fis[0] = 0x27; /* Register - Host to Device FIS */
549 fis[1] = pmp & 0xf; /* Port multiplier number*/
551 fis[1] |= (1 << 7); /* bit 7 indicates Command FIS */
553 fis[2] = tf->command;
554 fis[3] = tf->feature;
561 fis[8] = tf->hob_lbal;
562 fis[9] = tf->hob_lbam;
563 fis[10] = tf->hob_lbah;
564 fis[11] = tf->hob_feature;
567 fis[13] = tf->hob_nsect;
578 * ata_tf_from_fis - Convert SATA FIS to ATA taskfile
579 * @fis: Buffer from which data will be input
580 * @tf: Taskfile to output
582 * Converts a serial ATA FIS structure to a standard ATA taskfile.
585 * Inherited from caller.
588 void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf)
590 tf->command = fis[2]; /* status */
591 tf->feature = fis[3]; /* error */
598 tf->hob_lbal = fis[8];
599 tf->hob_lbam = fis[9];
600 tf->hob_lbah = fis[10];
603 tf->hob_nsect = fis[13];
606 static const u8 ata_rw_cmds[] = {
610 ATA_CMD_READ_MULTI_EXT,
611 ATA_CMD_WRITE_MULTI_EXT,
615 ATA_CMD_WRITE_MULTI_FUA_EXT,
619 ATA_CMD_PIO_READ_EXT,
620 ATA_CMD_PIO_WRITE_EXT,
633 ATA_CMD_WRITE_FUA_EXT
637 * ata_rwcmd_protocol - set taskfile r/w commands and protocol
638 * @tf: command to examine and configure
639 * @dev: device tf belongs to
641 * Examine the device configuration and tf->flags to calculate
642 * the proper read/write commands and protocol to use.
647 static int ata_rwcmd_protocol(struct ata_taskfile *tf, struct ata_device *dev)
651 int index, fua, lba48, write;
653 fua = (tf->flags & ATA_TFLAG_FUA) ? 4 : 0;
654 lba48 = (tf->flags & ATA_TFLAG_LBA48) ? 2 : 0;
655 write = (tf->flags & ATA_TFLAG_WRITE) ? 1 : 0;
657 if (dev->flags & ATA_DFLAG_PIO) {
658 tf->protocol = ATA_PROT_PIO;
659 index = dev->multi_count ? 0 : 8;
660 } else if (lba48 && (dev->link->ap->flags & ATA_FLAG_PIO_LBA48)) {
661 /* Unable to use DMA due to host limitation */
662 tf->protocol = ATA_PROT_PIO;
663 index = dev->multi_count ? 0 : 8;
665 tf->protocol = ATA_PROT_DMA;
669 cmd = ata_rw_cmds[index + fua + lba48 + write];
678 * ata_tf_read_block - Read block address from ATA taskfile
679 * @tf: ATA taskfile of interest
680 * @dev: ATA device @tf belongs to
685 * Read block address from @tf. This function can handle all
686 * three address formats - LBA, LBA48 and CHS. tf->protocol and
687 * flags select the address format to use.
690 * Block address read from @tf.
692 u64 ata_tf_read_block(struct ata_taskfile *tf, struct ata_device *dev)
696 if (tf->flags & ATA_TFLAG_LBA) {
697 if (tf->flags & ATA_TFLAG_LBA48) {
698 block |= (u64)tf->hob_lbah << 40;
699 block |= (u64)tf->hob_lbam << 32;
700 block |= (u64)tf->hob_lbal << 24;
702 block |= (tf->device & 0xf) << 24;
704 block |= tf->lbah << 16;
705 block |= tf->lbam << 8;
710 cyl = tf->lbam | (tf->lbah << 8);
711 head = tf->device & 0xf;
716 "device reported invalid CHS sector 0\n");
717 sect = 1; /* oh well */
720 block = (cyl * dev->heads + head) * dev->sectors + sect - 1;
727 * ata_build_rw_tf - Build ATA taskfile for given read/write request
728 * @tf: Target ATA taskfile
729 * @dev: ATA device @tf belongs to
730 * @block: Block address
731 * @n_block: Number of blocks
732 * @tf_flags: RW/FUA etc...
738 * Build ATA taskfile @tf for read/write request described by
739 * @block, @n_block, @tf_flags and @tag on @dev.
743 * 0 on success, -ERANGE if the request is too large for @dev,
744 * -EINVAL if the request is invalid.
746 int ata_build_rw_tf(struct ata_taskfile *tf, struct ata_device *dev,
747 u64 block, u32 n_block, unsigned int tf_flags,
750 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
751 tf->flags |= tf_flags;
753 if (ata_ncq_enabled(dev) && likely(tag != ATA_TAG_INTERNAL)) {
755 if (!lba_48_ok(block, n_block))
758 tf->protocol = ATA_PROT_NCQ;
759 tf->flags |= ATA_TFLAG_LBA | ATA_TFLAG_LBA48;
761 if (tf->flags & ATA_TFLAG_WRITE)
762 tf->command = ATA_CMD_FPDMA_WRITE;
764 tf->command = ATA_CMD_FPDMA_READ;
766 tf->nsect = tag << 3;
767 tf->hob_feature = (n_block >> 8) & 0xff;
768 tf->feature = n_block & 0xff;
770 tf->hob_lbah = (block >> 40) & 0xff;
771 tf->hob_lbam = (block >> 32) & 0xff;
772 tf->hob_lbal = (block >> 24) & 0xff;
773 tf->lbah = (block >> 16) & 0xff;
774 tf->lbam = (block >> 8) & 0xff;
775 tf->lbal = block & 0xff;
777 tf->device = ATA_LBA;
778 if (tf->flags & ATA_TFLAG_FUA)
779 tf->device |= 1 << 7;
780 } else if (dev->flags & ATA_DFLAG_LBA) {
781 tf->flags |= ATA_TFLAG_LBA;
783 if (lba_28_ok(block, n_block)) {
785 tf->device |= (block >> 24) & 0xf;
786 } else if (lba_48_ok(block, n_block)) {
787 if (!(dev->flags & ATA_DFLAG_LBA48))
791 tf->flags |= ATA_TFLAG_LBA48;
793 tf->hob_nsect = (n_block >> 8) & 0xff;
795 tf->hob_lbah = (block >> 40) & 0xff;
796 tf->hob_lbam = (block >> 32) & 0xff;
797 tf->hob_lbal = (block >> 24) & 0xff;
799 /* request too large even for LBA48 */
802 if (unlikely(ata_rwcmd_protocol(tf, dev) < 0))
805 tf->nsect = n_block & 0xff;
807 tf->lbah = (block >> 16) & 0xff;
808 tf->lbam = (block >> 8) & 0xff;
809 tf->lbal = block & 0xff;
811 tf->device |= ATA_LBA;
814 u32 sect, head, cyl, track;
816 /* The request -may- be too large for CHS addressing. */
817 if (!lba_28_ok(block, n_block))
820 if (unlikely(ata_rwcmd_protocol(tf, dev) < 0))
823 /* Convert LBA to CHS */
824 track = (u32)block / dev->sectors;
825 cyl = track / dev->heads;
826 head = track % dev->heads;
827 sect = (u32)block % dev->sectors + 1;
829 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
830 (u32)block, track, cyl, head, sect);
832 /* Check whether the converted CHS can fit.
836 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
839 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
850 * ata_pack_xfermask - Pack pio, mwdma and udma masks into xfer_mask
851 * @pio_mask: pio_mask
852 * @mwdma_mask: mwdma_mask
853 * @udma_mask: udma_mask
855 * Pack @pio_mask, @mwdma_mask and @udma_mask into a single
856 * unsigned int xfer_mask.
864 unsigned long ata_pack_xfermask(unsigned long pio_mask,
865 unsigned long mwdma_mask,
866 unsigned long udma_mask)
868 return ((pio_mask << ATA_SHIFT_PIO) & ATA_MASK_PIO) |
869 ((mwdma_mask << ATA_SHIFT_MWDMA) & ATA_MASK_MWDMA) |
870 ((udma_mask << ATA_SHIFT_UDMA) & ATA_MASK_UDMA);
874 * ata_unpack_xfermask - Unpack xfer_mask into pio, mwdma and udma masks
875 * @xfer_mask: xfer_mask to unpack
876 * @pio_mask: resulting pio_mask
877 * @mwdma_mask: resulting mwdma_mask
878 * @udma_mask: resulting udma_mask
880 * Unpack @xfer_mask into @pio_mask, @mwdma_mask and @udma_mask.
881 * Any NULL distination masks will be ignored.
883 void ata_unpack_xfermask(unsigned long xfer_mask, unsigned long *pio_mask,
884 unsigned long *mwdma_mask, unsigned long *udma_mask)
887 *pio_mask = (xfer_mask & ATA_MASK_PIO) >> ATA_SHIFT_PIO;
889 *mwdma_mask = (xfer_mask & ATA_MASK_MWDMA) >> ATA_SHIFT_MWDMA;
891 *udma_mask = (xfer_mask & ATA_MASK_UDMA) >> ATA_SHIFT_UDMA;
894 static const struct ata_xfer_ent {
898 { ATA_SHIFT_PIO, ATA_NR_PIO_MODES, XFER_PIO_0 },
899 { ATA_SHIFT_MWDMA, ATA_NR_MWDMA_MODES, XFER_MW_DMA_0 },
900 { ATA_SHIFT_UDMA, ATA_NR_UDMA_MODES, XFER_UDMA_0 },
905 * ata_xfer_mask2mode - Find matching XFER_* for the given xfer_mask
906 * @xfer_mask: xfer_mask of interest
908 * Return matching XFER_* value for @xfer_mask. Only the highest
909 * bit of @xfer_mask is considered.
915 * Matching XFER_* value, 0xff if no match found.
917 u8 ata_xfer_mask2mode(unsigned long xfer_mask)
919 int highbit = fls(xfer_mask) - 1;
920 const struct ata_xfer_ent *ent;
922 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
923 if (highbit >= ent->shift && highbit < ent->shift + ent->bits)
924 return ent->base + highbit - ent->shift;
929 * ata_xfer_mode2mask - Find matching xfer_mask for XFER_*
930 * @xfer_mode: XFER_* of interest
932 * Return matching xfer_mask for @xfer_mode.
938 * Matching xfer_mask, 0 if no match found.
940 unsigned long ata_xfer_mode2mask(u8 xfer_mode)
942 const struct ata_xfer_ent *ent;
944 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
945 if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits)
946 return ((2 << (ent->shift + xfer_mode - ent->base)) - 1)
947 & ~((1 << ent->shift) - 1);
952 * ata_xfer_mode2shift - Find matching xfer_shift for XFER_*
953 * @xfer_mode: XFER_* of interest
955 * Return matching xfer_shift for @xfer_mode.
961 * Matching xfer_shift, -1 if no match found.
963 int ata_xfer_mode2shift(unsigned long xfer_mode)
965 const struct ata_xfer_ent *ent;
967 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
968 if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits)
974 * ata_mode_string - convert xfer_mask to string
975 * @xfer_mask: mask of bits supported; only highest bit counts.
977 * Determine string which represents the highest speed
978 * (highest bit in @modemask).
984 * Constant C string representing highest speed listed in
985 * @mode_mask, or the constant C string "<n/a>".
987 const char *ata_mode_string(unsigned long xfer_mask)
989 static const char * const xfer_mode_str[] = {
1013 highbit = fls(xfer_mask) - 1;
1014 if (highbit >= 0 && highbit < ARRAY_SIZE(xfer_mode_str))
1015 return xfer_mode_str[highbit];
1019 const char *sata_spd_string(unsigned int spd)
1021 static const char * const spd_str[] = {
1027 if (spd == 0 || (spd - 1) >= ARRAY_SIZE(spd_str))
1029 return spd_str[spd - 1];
1033 * ata_dev_classify - determine device type based on ATA-spec signature
1034 * @tf: ATA taskfile register set for device to be identified
1036 * Determine from taskfile register contents whether a device is
1037 * ATA or ATAPI, as per "Signature and persistence" section
1038 * of ATA/PI spec (volume 1, sect 5.14).
1044 * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, %ATA_DEV_PMP or
1045 * %ATA_DEV_UNKNOWN the event of failure.
1047 unsigned int ata_dev_classify(const struct ata_taskfile *tf)
1049 /* Apple's open source Darwin code hints that some devices only
1050 * put a proper signature into the LBA mid/high registers,
1051 * So, we only check those. It's sufficient for uniqueness.
1053 * ATA/ATAPI-7 (d1532v1r1: Feb. 19, 2003) specified separate
1054 * signatures for ATA and ATAPI devices attached on SerialATA,
1055 * 0x3c/0xc3 and 0x69/0x96 respectively. However, SerialATA
1056 * spec has never mentioned about using different signatures
1057 * for ATA/ATAPI devices. Then, Serial ATA II: Port
1058 * Multiplier specification began to use 0x69/0x96 to identify
1059 * port multpliers and 0x3c/0xc3 to identify SEMB device.
1060 * ATA/ATAPI-7 dropped descriptions about 0x3c/0xc3 and
1061 * 0x69/0x96 shortly and described them as reserved for
1064 * We follow the current spec and consider that 0x69/0x96
1065 * identifies a port multiplier and 0x3c/0xc3 a SEMB device.
1066 * Unfortunately, WDC WD1600JS-62MHB5 (a hard drive) reports
1067 * SEMB signature. This is worked around in
1068 * ata_dev_read_id().
1070 if ((tf->lbam == 0) && (tf->lbah == 0)) {
1071 DPRINTK("found ATA device by sig\n");
1075 if ((tf->lbam == 0x14) && (tf->lbah == 0xeb)) {
1076 DPRINTK("found ATAPI device by sig\n");
1077 return ATA_DEV_ATAPI;
1080 if ((tf->lbam == 0x69) && (tf->lbah == 0x96)) {
1081 DPRINTK("found PMP device by sig\n");
1085 if ((tf->lbam == 0x3c) && (tf->lbah == 0xc3)) {
1086 DPRINTK("found SEMB device by sig (could be ATA device)\n");
1087 return ATA_DEV_SEMB;
1090 DPRINTK("unknown device\n");
1091 return ATA_DEV_UNKNOWN;
1095 * ata_id_string - Convert IDENTIFY DEVICE page into string
1096 * @id: IDENTIFY DEVICE results we will examine
1097 * @s: string into which data is output
1098 * @ofs: offset into identify device page
1099 * @len: length of string to return. must be an even number.
1101 * The strings in the IDENTIFY DEVICE page are broken up into
1102 * 16-bit chunks. Run through the string, and output each
1103 * 8-bit chunk linearly, regardless of platform.
1109 void ata_id_string(const u16 *id, unsigned char *s,
1110 unsigned int ofs, unsigned int len)
1131 * ata_id_c_string - Convert IDENTIFY DEVICE page into C string
1132 * @id: IDENTIFY DEVICE results we will examine
1133 * @s: string into which data is output
1134 * @ofs: offset into identify device page
1135 * @len: length of string to return. must be an odd number.
1137 * This function is identical to ata_id_string except that it
1138 * trims trailing spaces and terminates the resulting string with
1139 * null. @len must be actual maximum length (even number) + 1.
1144 void ata_id_c_string(const u16 *id, unsigned char *s,
1145 unsigned int ofs, unsigned int len)
1149 ata_id_string(id, s, ofs, len - 1);
1151 p = s + strnlen(s, len - 1);
1152 while (p > s && p[-1] == ' ')
1157 static u64 ata_id_n_sectors(const u16 *id)
1159 if (ata_id_has_lba(id)) {
1160 if (ata_id_has_lba48(id))
1161 return ata_id_u64(id, ATA_ID_LBA_CAPACITY_2);
1163 return ata_id_u32(id, ATA_ID_LBA_CAPACITY);
1165 if (ata_id_current_chs_valid(id))
1166 return id[ATA_ID_CUR_CYLS] * id[ATA_ID_CUR_HEADS] *
1167 id[ATA_ID_CUR_SECTORS];
1169 return id[ATA_ID_CYLS] * id[ATA_ID_HEADS] *
1174 u64 ata_tf_to_lba48(const struct ata_taskfile *tf)
1178 sectors |= ((u64)(tf->hob_lbah & 0xff)) << 40;
1179 sectors |= ((u64)(tf->hob_lbam & 0xff)) << 32;
1180 sectors |= ((u64)(tf->hob_lbal & 0xff)) << 24;
1181 sectors |= (tf->lbah & 0xff) << 16;
1182 sectors |= (tf->lbam & 0xff) << 8;
1183 sectors |= (tf->lbal & 0xff);
1188 u64 ata_tf_to_lba(const struct ata_taskfile *tf)
1192 sectors |= (tf->device & 0x0f) << 24;
1193 sectors |= (tf->lbah & 0xff) << 16;
1194 sectors |= (tf->lbam & 0xff) << 8;
1195 sectors |= (tf->lbal & 0xff);
1201 * ata_read_native_max_address - Read native max address
1202 * @dev: target device
1203 * @max_sectors: out parameter for the result native max address
1205 * Perform an LBA48 or LBA28 native size query upon the device in
1209 * 0 on success, -EACCES if command is aborted by the drive.
1210 * -EIO on other errors.
1212 static int ata_read_native_max_address(struct ata_device *dev, u64 *max_sectors)
1214 unsigned int err_mask;
1215 struct ata_taskfile tf;
1216 int lba48 = ata_id_has_lba48(dev->id);
1218 ata_tf_init(dev, &tf);
1220 /* always clear all address registers */
1221 tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
1224 tf.command = ATA_CMD_READ_NATIVE_MAX_EXT;
1225 tf.flags |= ATA_TFLAG_LBA48;
1227 tf.command = ATA_CMD_READ_NATIVE_MAX;
1229 tf.protocol |= ATA_PROT_NODATA;
1230 tf.device |= ATA_LBA;
1232 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
1235 "failed to read native max address (err_mask=0x%x)\n",
1237 if (err_mask == AC_ERR_DEV && (tf.feature & ATA_ABORTED))
1243 *max_sectors = ata_tf_to_lba48(&tf) + 1;
1245 *max_sectors = ata_tf_to_lba(&tf) + 1;
1246 if (dev->horkage & ATA_HORKAGE_HPA_SIZE)
1252 * ata_set_max_sectors - Set max sectors
1253 * @dev: target device
1254 * @new_sectors: new max sectors value to set for the device
1256 * Set max sectors of @dev to @new_sectors.
1259 * 0 on success, -EACCES if command is aborted or denied (due to
1260 * previous non-volatile SET_MAX) by the drive. -EIO on other
1263 static int ata_set_max_sectors(struct ata_device *dev, u64 new_sectors)
1265 unsigned int err_mask;
1266 struct ata_taskfile tf;
1267 int lba48 = ata_id_has_lba48(dev->id);
1271 ata_tf_init(dev, &tf);
1273 tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
1276 tf.command = ATA_CMD_SET_MAX_EXT;
1277 tf.flags |= ATA_TFLAG_LBA48;
1279 tf.hob_lbal = (new_sectors >> 24) & 0xff;
1280 tf.hob_lbam = (new_sectors >> 32) & 0xff;
1281 tf.hob_lbah = (new_sectors >> 40) & 0xff;
1283 tf.command = ATA_CMD_SET_MAX;
1285 tf.device |= (new_sectors >> 24) & 0xf;
1288 tf.protocol |= ATA_PROT_NODATA;
1289 tf.device |= ATA_LBA;
1291 tf.lbal = (new_sectors >> 0) & 0xff;
1292 tf.lbam = (new_sectors >> 8) & 0xff;
1293 tf.lbah = (new_sectors >> 16) & 0xff;
1295 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
1298 "failed to set max address (err_mask=0x%x)\n",
1300 if (err_mask == AC_ERR_DEV &&
1301 (tf.feature & (ATA_ABORTED | ATA_IDNF)))
1310 * ata_hpa_resize - Resize a device with an HPA set
1311 * @dev: Device to resize
1313 * Read the size of an LBA28 or LBA48 disk with HPA features and resize
1314 * it if required to the full size of the media. The caller must check
1315 * the drive has the HPA feature set enabled.
1318 * 0 on success, -errno on failure.
1320 static int ata_hpa_resize(struct ata_device *dev)
1322 struct ata_eh_context *ehc = &dev->link->eh_context;
1323 int print_info = ehc->i.flags & ATA_EHI_PRINTINFO;
1324 bool unlock_hpa = ata_ignore_hpa || dev->flags & ATA_DFLAG_UNLOCK_HPA;
1325 u64 sectors = ata_id_n_sectors(dev->id);
1329 /* do we need to do it? */
1330 if (dev->class != ATA_DEV_ATA ||
1331 !ata_id_has_lba(dev->id) || !ata_id_hpa_enabled(dev->id) ||
1332 (dev->horkage & ATA_HORKAGE_BROKEN_HPA))
1335 /* read native max address */
1336 rc = ata_read_native_max_address(dev, &native_sectors);
1338 /* If device aborted the command or HPA isn't going to
1339 * be unlocked, skip HPA resizing.
1341 if (rc == -EACCES || !unlock_hpa) {
1343 "HPA support seems broken, skipping HPA handling\n");
1344 dev->horkage |= ATA_HORKAGE_BROKEN_HPA;
1346 /* we can continue if device aborted the command */
1353 dev->n_native_sectors = native_sectors;
1355 /* nothing to do? */
1356 if (native_sectors <= sectors || !unlock_hpa) {
1357 if (!print_info || native_sectors == sectors)
1360 if (native_sectors > sectors)
1362 "HPA detected: current %llu, native %llu\n",
1363 (unsigned long long)sectors,
1364 (unsigned long long)native_sectors);
1365 else if (native_sectors < sectors)
1367 "native sectors (%llu) is smaller than sectors (%llu)\n",
1368 (unsigned long long)native_sectors,
1369 (unsigned long long)sectors);
1373 /* let's unlock HPA */
1374 rc = ata_set_max_sectors(dev, native_sectors);
1375 if (rc == -EACCES) {
1376 /* if device aborted the command, skip HPA resizing */
1378 "device aborted resize (%llu -> %llu), skipping HPA handling\n",
1379 (unsigned long long)sectors,
1380 (unsigned long long)native_sectors);
1381 dev->horkage |= ATA_HORKAGE_BROKEN_HPA;
1386 /* re-read IDENTIFY data */
1387 rc = ata_dev_reread_id(dev, 0);
1390 "failed to re-read IDENTIFY data after HPA resizing\n");
1395 u64 new_sectors = ata_id_n_sectors(dev->id);
1397 "HPA unlocked: %llu -> %llu, native %llu\n",
1398 (unsigned long long)sectors,
1399 (unsigned long long)new_sectors,
1400 (unsigned long long)native_sectors);
1407 * ata_dump_id - IDENTIFY DEVICE info debugging output
1408 * @id: IDENTIFY DEVICE page to dump
1410 * Dump selected 16-bit words from the given IDENTIFY DEVICE
1417 static inline void ata_dump_id(const u16 *id)
1419 DPRINTK("49==0x%04x "
1429 DPRINTK("80==0x%04x "
1439 DPRINTK("88==0x%04x "
1446 * ata_id_xfermask - Compute xfermask from the given IDENTIFY data
1447 * @id: IDENTIFY data to compute xfer mask from
1449 * Compute the xfermask for this device. This is not as trivial
1450 * as it seems if we must consider early devices correctly.
1452 * FIXME: pre IDE drive timing (do we care ?).
1460 unsigned long ata_id_xfermask(const u16 *id)
1462 unsigned long pio_mask, mwdma_mask, udma_mask;
1464 /* Usual case. Word 53 indicates word 64 is valid */
1465 if (id[ATA_ID_FIELD_VALID] & (1 << 1)) {
1466 pio_mask = id[ATA_ID_PIO_MODES] & 0x03;
1470 /* If word 64 isn't valid then Word 51 high byte holds
1471 * the PIO timing number for the maximum. Turn it into
1474 u8 mode = (id[ATA_ID_OLD_PIO_MODES] >> 8) & 0xFF;
1475 if (mode < 5) /* Valid PIO range */
1476 pio_mask = (2 << mode) - 1;
1480 /* But wait.. there's more. Design your standards by
1481 * committee and you too can get a free iordy field to
1482 * process. However its the speeds not the modes that
1483 * are supported... Note drivers using the timing API
1484 * will get this right anyway
1488 mwdma_mask = id[ATA_ID_MWDMA_MODES] & 0x07;
1490 if (ata_id_is_cfa(id)) {
1492 * Process compact flash extended modes
1494 int pio = (id[ATA_ID_CFA_MODES] >> 0) & 0x7;
1495 int dma = (id[ATA_ID_CFA_MODES] >> 3) & 0x7;
1498 pio_mask |= (1 << 5);
1500 pio_mask |= (1 << 6);
1502 mwdma_mask |= (1 << 3);
1504 mwdma_mask |= (1 << 4);
1508 if (id[ATA_ID_FIELD_VALID] & (1 << 2))
1509 udma_mask = id[ATA_ID_UDMA_MODES] & 0xff;
1511 return ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask);
1514 static void ata_qc_complete_internal(struct ata_queued_cmd *qc)
1516 struct completion *waiting = qc->private_data;
1522 * ata_exec_internal_sg - execute libata internal command
1523 * @dev: Device to which the command is sent
1524 * @tf: Taskfile registers for the command and the result
1525 * @cdb: CDB for packet command
1526 * @dma_dir: Data tranfer direction of the command
1527 * @sgl: sg list for the data buffer of the command
1528 * @n_elem: Number of sg entries
1529 * @timeout: Timeout in msecs (0 for default)
1531 * Executes libata internal command with timeout. @tf contains
1532 * command on entry and result on return. Timeout and error
1533 * conditions are reported via return value. No recovery action
1534 * is taken after a command times out. It's caller's duty to
1535 * clean up after timeout.
1538 * None. Should be called with kernel context, might sleep.
1541 * Zero on success, AC_ERR_* mask on failure
1543 unsigned ata_exec_internal_sg(struct ata_device *dev,
1544 struct ata_taskfile *tf, const u8 *cdb,
1545 int dma_dir, struct scatterlist *sgl,
1546 unsigned int n_elem, unsigned long timeout)
1548 struct ata_link *link = dev->link;
1549 struct ata_port *ap = link->ap;
1550 u8 command = tf->command;
1551 int auto_timeout = 0;
1552 struct ata_queued_cmd *qc;
1553 unsigned int tag, preempted_tag;
1554 u32 preempted_sactive, preempted_qc_active;
1555 int preempted_nr_active_links;
1556 DECLARE_COMPLETION_ONSTACK(wait);
1557 unsigned long flags;
1558 unsigned int err_mask;
1561 spin_lock_irqsave(ap->lock, flags);
1563 /* no internal command while frozen */
1564 if (ap->pflags & ATA_PFLAG_FROZEN) {
1565 spin_unlock_irqrestore(ap->lock, flags);
1566 return AC_ERR_SYSTEM;
1569 /* initialize internal qc */
1571 /* XXX: Tag 0 is used for drivers with legacy EH as some
1572 * drivers choke if any other tag is given. This breaks
1573 * ata_tag_internal() test for those drivers. Don't use new
1574 * EH stuff without converting to it.
1576 if (ap->ops->error_handler)
1577 tag = ATA_TAG_INTERNAL;
1581 if (test_and_set_bit(tag, &ap->qc_allocated))
1583 qc = __ata_qc_from_tag(ap, tag);
1591 preempted_tag = link->active_tag;
1592 preempted_sactive = link->sactive;
1593 preempted_qc_active = ap->qc_active;
1594 preempted_nr_active_links = ap->nr_active_links;
1595 link->active_tag = ATA_TAG_POISON;
1598 ap->nr_active_links = 0;
1600 /* prepare & issue qc */
1603 memcpy(qc->cdb, cdb, ATAPI_CDB_LEN);
1604 qc->flags |= ATA_QCFLAG_RESULT_TF;
1605 qc->dma_dir = dma_dir;
1606 if (dma_dir != DMA_NONE) {
1607 unsigned int i, buflen = 0;
1608 struct scatterlist *sg;
1610 for_each_sg(sgl, sg, n_elem, i)
1611 buflen += sg->length;
1613 ata_sg_init(qc, sgl, n_elem);
1614 qc->nbytes = buflen;
1617 qc->private_data = &wait;
1618 qc->complete_fn = ata_qc_complete_internal;
1622 spin_unlock_irqrestore(ap->lock, flags);
1625 if (ata_probe_timeout)
1626 timeout = ata_probe_timeout * 1000;
1628 timeout = ata_internal_cmd_timeout(dev, command);
1633 if (ap->ops->error_handler)
1636 rc = wait_for_completion_timeout(&wait, msecs_to_jiffies(timeout));
1638 if (ap->ops->error_handler)
1641 ata_sff_flush_pio_task(ap);
1644 spin_lock_irqsave(ap->lock, flags);
1646 /* We're racing with irq here. If we lose, the
1647 * following test prevents us from completing the qc
1648 * twice. If we win, the port is frozen and will be
1649 * cleaned up by ->post_internal_cmd().
1651 if (qc->flags & ATA_QCFLAG_ACTIVE) {
1652 qc->err_mask |= AC_ERR_TIMEOUT;
1654 if (ap->ops->error_handler)
1655 ata_port_freeze(ap);
1657 ata_qc_complete(qc);
1659 if (ata_msg_warn(ap))
1660 ata_dev_warn(dev, "qc timeout (cmd 0x%x)\n",
1664 spin_unlock_irqrestore(ap->lock, flags);
1667 /* do post_internal_cmd */
1668 if (ap->ops->post_internal_cmd)
1669 ap->ops->post_internal_cmd(qc);
1671 /* perform minimal error analysis */
1672 if (qc->flags & ATA_QCFLAG_FAILED) {
1673 if (qc->result_tf.command & (ATA_ERR | ATA_DF))
1674 qc->err_mask |= AC_ERR_DEV;
1677 qc->err_mask |= AC_ERR_OTHER;
1679 if (qc->err_mask & ~AC_ERR_OTHER)
1680 qc->err_mask &= ~AC_ERR_OTHER;
1684 spin_lock_irqsave(ap->lock, flags);
1686 *tf = qc->result_tf;
1687 err_mask = qc->err_mask;
1690 link->active_tag = preempted_tag;
1691 link->sactive = preempted_sactive;
1692 ap->qc_active = preempted_qc_active;
1693 ap->nr_active_links = preempted_nr_active_links;
1695 spin_unlock_irqrestore(ap->lock, flags);
1697 if ((err_mask & AC_ERR_TIMEOUT) && auto_timeout)
1698 ata_internal_cmd_timed_out(dev, command);
1704 * ata_exec_internal - execute libata internal command
1705 * @dev: Device to which the command is sent
1706 * @tf: Taskfile registers for the command and the result
1707 * @cdb: CDB for packet command
1708 * @dma_dir: Data tranfer direction of the command
1709 * @buf: Data buffer of the command
1710 * @buflen: Length of data buffer
1711 * @timeout: Timeout in msecs (0 for default)
1713 * Wrapper around ata_exec_internal_sg() which takes simple
1714 * buffer instead of sg list.
1717 * None. Should be called with kernel context, might sleep.
1720 * Zero on success, AC_ERR_* mask on failure
1722 unsigned ata_exec_internal(struct ata_device *dev,
1723 struct ata_taskfile *tf, const u8 *cdb,
1724 int dma_dir, void *buf, unsigned int buflen,
1725 unsigned long timeout)
1727 struct scatterlist *psg = NULL, sg;
1728 unsigned int n_elem = 0;
1730 if (dma_dir != DMA_NONE) {
1732 sg_init_one(&sg, buf, buflen);
1737 return ata_exec_internal_sg(dev, tf, cdb, dma_dir, psg, n_elem,
1742 * ata_do_simple_cmd - execute simple internal command
1743 * @dev: Device to which the command is sent
1744 * @cmd: Opcode to execute
1746 * Execute a 'simple' command, that only consists of the opcode
1747 * 'cmd' itself, without filling any other registers
1750 * Kernel thread context (may sleep).
1753 * Zero on success, AC_ERR_* mask on failure
1755 unsigned int ata_do_simple_cmd(struct ata_device *dev, u8 cmd)
1757 struct ata_taskfile tf;
1759 ata_tf_init(dev, &tf);
1762 tf.flags |= ATA_TFLAG_DEVICE;
1763 tf.protocol = ATA_PROT_NODATA;
1765 return ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
1769 * ata_pio_need_iordy - check if iordy needed
1772 * Check if the current speed of the device requires IORDY. Used
1773 * by various controllers for chip configuration.
1775 unsigned int ata_pio_need_iordy(const struct ata_device *adev)
1777 /* Don't set IORDY if we're preparing for reset. IORDY may
1778 * lead to controller lock up on certain controllers if the
1779 * port is not occupied. See bko#11703 for details.
1781 if (adev->link->ap->pflags & ATA_PFLAG_RESETTING)
1783 /* Controller doesn't support IORDY. Probably a pointless
1784 * check as the caller should know this.
1786 if (adev->link->ap->flags & ATA_FLAG_NO_IORDY)
1788 /* CF spec. r4.1 Table 22 says no iordy on PIO5 and PIO6. */
1789 if (ata_id_is_cfa(adev->id)
1790 && (adev->pio_mode == XFER_PIO_5 || adev->pio_mode == XFER_PIO_6))
1792 /* PIO3 and higher it is mandatory */
1793 if (adev->pio_mode > XFER_PIO_2)
1795 /* We turn it on when possible */
1796 if (ata_id_has_iordy(adev->id))
1802 * ata_pio_mask_no_iordy - Return the non IORDY mask
1805 * Compute the highest mode possible if we are not using iordy. Return
1806 * -1 if no iordy mode is available.
1808 static u32 ata_pio_mask_no_iordy(const struct ata_device *adev)
1810 /* If we have no drive specific rule, then PIO 2 is non IORDY */
1811 if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE */
1812 u16 pio = adev->id[ATA_ID_EIDE_PIO];
1813 /* Is the speed faster than the drive allows non IORDY ? */
1815 /* This is cycle times not frequency - watch the logic! */
1816 if (pio > 240) /* PIO2 is 240nS per cycle */
1817 return 3 << ATA_SHIFT_PIO;
1818 return 7 << ATA_SHIFT_PIO;
1821 return 3 << ATA_SHIFT_PIO;
1825 * ata_do_dev_read_id - default ID read method
1827 * @tf: proposed taskfile
1830 * Issue the identify taskfile and hand back the buffer containing
1831 * identify data. For some RAID controllers and for pre ATA devices
1832 * this function is wrapped or replaced by the driver
1834 unsigned int ata_do_dev_read_id(struct ata_device *dev,
1835 struct ata_taskfile *tf, u16 *id)
1837 return ata_exec_internal(dev, tf, NULL, DMA_FROM_DEVICE,
1838 id, sizeof(id[0]) * ATA_ID_WORDS, 0);
1842 * ata_dev_read_id - Read ID data from the specified device
1843 * @dev: target device
1844 * @p_class: pointer to class of the target device (may be changed)
1845 * @flags: ATA_READID_* flags
1846 * @id: buffer to read IDENTIFY data into
1848 * Read ID data from the specified device. ATA_CMD_ID_ATA is
1849 * performed on ATA devices and ATA_CMD_ID_ATAPI on ATAPI
1850 * devices. This function also issues ATA_CMD_INIT_DEV_PARAMS
1851 * for pre-ATA4 drives.
1853 * FIXME: ATA_CMD_ID_ATA is optional for early drives and right
1854 * now we abort if we hit that case.
1857 * Kernel thread context (may sleep)
1860 * 0 on success, -errno otherwise.
1862 int ata_dev_read_id(struct ata_device *dev, unsigned int *p_class,
1863 unsigned int flags, u16 *id)
1865 struct ata_port *ap = dev->link->ap;
1866 unsigned int class = *p_class;
1867 struct ata_taskfile tf;
1868 unsigned int err_mask = 0;
1870 bool is_semb = class == ATA_DEV_SEMB;
1871 int may_fallback = 1, tried_spinup = 0;
1874 if (ata_msg_ctl(ap))
1875 ata_dev_dbg(dev, "%s: ENTER\n", __func__);
1878 ata_tf_init(dev, &tf);
1882 class = ATA_DEV_ATA; /* some hard drives report SEMB sig */
1884 tf.command = ATA_CMD_ID_ATA;
1887 tf.command = ATA_CMD_ID_ATAPI;
1891 reason = "unsupported class";
1895 tf.protocol = ATA_PROT_PIO;
1897 /* Some devices choke if TF registers contain garbage. Make
1898 * sure those are properly initialized.
1900 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
1902 /* Device presence detection is unreliable on some
1903 * controllers. Always poll IDENTIFY if available.
1905 tf.flags |= ATA_TFLAG_POLLING;
1907 if (ap->ops->read_id)
1908 err_mask = ap->ops->read_id(dev, &tf, id);
1910 err_mask = ata_do_dev_read_id(dev, &tf, id);
1913 if (err_mask & AC_ERR_NODEV_HINT) {
1914 ata_dev_dbg(dev, "NODEV after polling detection\n");
1920 "IDENTIFY failed on device w/ SEMB sig, disabled\n");
1921 /* SEMB is not supported yet */
1922 *p_class = ATA_DEV_SEMB_UNSUP;
1926 if ((err_mask == AC_ERR_DEV) && (tf.feature & ATA_ABORTED)) {
1927 /* Device or controller might have reported
1928 * the wrong device class. Give a shot at the
1929 * other IDENTIFY if the current one is
1930 * aborted by the device.
1935 if (class == ATA_DEV_ATA)
1936 class = ATA_DEV_ATAPI;
1938 class = ATA_DEV_ATA;
1942 /* Control reaches here iff the device aborted
1943 * both flavors of IDENTIFYs which happens
1944 * sometimes with phantom devices.
1947 "both IDENTIFYs aborted, assuming NODEV\n");
1952 reason = "I/O error";
1956 if (dev->horkage & ATA_HORKAGE_DUMP_ID) {
1957 ata_dev_dbg(dev, "dumping IDENTIFY data, "
1958 "class=%d may_fallback=%d tried_spinup=%d\n",
1959 class, may_fallback, tried_spinup);
1960 print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET,
1961 16, 2, id, ATA_ID_WORDS * sizeof(*id), true);
1964 /* Falling back doesn't make sense if ID data was read
1965 * successfully at least once.
1969 swap_buf_le16(id, ATA_ID_WORDS);
1973 reason = "device reports invalid type";
1975 if (class == ATA_DEV_ATA) {
1976 if (!ata_id_is_ata(id) && !ata_id_is_cfa(id))
1978 if (ap->host->flags & ATA_HOST_IGNORE_ATA &&
1979 ata_id_is_ata(id)) {
1981 "host indicates ignore ATA devices, ignored\n");
1985 if (ata_id_is_ata(id))
1989 if (!tried_spinup && (id[2] == 0x37c8 || id[2] == 0x738c)) {
1992 * Drive powered-up in standby mode, and requires a specific
1993 * SET_FEATURES spin-up subcommand before it will accept
1994 * anything other than the original IDENTIFY command.
1996 err_mask = ata_dev_set_feature(dev, SETFEATURES_SPINUP, 0);
1997 if (err_mask && id[2] != 0x738c) {
1999 reason = "SPINUP failed";
2003 * If the drive initially returned incomplete IDENTIFY info,
2004 * we now must reissue the IDENTIFY command.
2006 if (id[2] == 0x37c8)
2010 if ((flags & ATA_READID_POSTRESET) && class == ATA_DEV_ATA) {
2012 * The exact sequence expected by certain pre-ATA4 drives is:
2014 * IDENTIFY (optional in early ATA)
2015 * INITIALIZE DEVICE PARAMETERS (later IDE and ATA)
2017 * Some drives were very specific about that exact sequence.
2019 * Note that ATA4 says lba is mandatory so the second check
2020 * should never trigger.
2022 if (ata_id_major_version(id) < 4 || !ata_id_has_lba(id)) {
2023 err_mask = ata_dev_init_params(dev, id[3], id[6]);
2026 reason = "INIT_DEV_PARAMS failed";
2030 /* current CHS translation info (id[53-58]) might be
2031 * changed. reread the identify device info.
2033 flags &= ~ATA_READID_POSTRESET;
2043 if (ata_msg_warn(ap))
2044 ata_dev_warn(dev, "failed to IDENTIFY (%s, err_mask=0x%x)\n",
2049 static int ata_do_link_spd_horkage(struct ata_device *dev)
2051 struct ata_link *plink = ata_dev_phys_link(dev);
2052 u32 target, target_limit;
2054 if (!sata_scr_valid(plink))
2057 if (dev->horkage & ATA_HORKAGE_1_5_GBPS)
2062 target_limit = (1 << target) - 1;
2064 /* if already on stricter limit, no need to push further */
2065 if (plink->sata_spd_limit <= target_limit)
2068 plink->sata_spd_limit = target_limit;
2070 /* Request another EH round by returning -EAGAIN if link is
2071 * going faster than the target speed. Forward progress is
2072 * guaranteed by setting sata_spd_limit to target_limit above.
2074 if (plink->sata_spd > target) {
2075 ata_dev_info(dev, "applying link speed limit horkage to %s\n",
2076 sata_spd_string(target));
2082 static inline u8 ata_dev_knobble(struct ata_device *dev)
2084 struct ata_port *ap = dev->link->ap;
2086 if (ata_dev_blacklisted(dev) & ATA_HORKAGE_BRIDGE_OK)
2089 return ((ap->cbl == ATA_CBL_SATA) && (!ata_id_is_sata(dev->id)));
2092 static int ata_dev_config_ncq(struct ata_device *dev,
2093 char *desc, size_t desc_sz)
2095 struct ata_port *ap = dev->link->ap;
2096 int hdepth = 0, ddepth = ata_id_queue_depth(dev->id);
2097 unsigned int err_mask;
2100 if (!ata_id_has_ncq(dev->id)) {
2104 if (dev->horkage & ATA_HORKAGE_NONCQ) {
2105 snprintf(desc, desc_sz, "NCQ (not used)");
2108 if (ap->flags & ATA_FLAG_NCQ) {
2109 hdepth = min(ap->scsi_host->can_queue, ATA_MAX_QUEUE - 1);
2110 dev->flags |= ATA_DFLAG_NCQ;
2113 if (!(dev->horkage & ATA_HORKAGE_BROKEN_FPDMA_AA) &&
2114 (ap->flags & ATA_FLAG_FPDMA_AA) &&
2115 ata_id_has_fpdma_aa(dev->id)) {
2116 err_mask = ata_dev_set_feature(dev, SETFEATURES_SATA_ENABLE,
2120 "failed to enable AA (error_mask=0x%x)\n",
2122 if (err_mask != AC_ERR_DEV) {
2123 dev->horkage |= ATA_HORKAGE_BROKEN_FPDMA_AA;
2130 if (hdepth >= ddepth)
2131 snprintf(desc, desc_sz, "NCQ (depth %d)%s", ddepth, aa_desc);
2133 snprintf(desc, desc_sz, "NCQ (depth %d/%d)%s", hdepth,
2139 * ata_dev_configure - Configure the specified ATA/ATAPI device
2140 * @dev: Target device to configure
2142 * Configure @dev according to @dev->id. Generic and low-level
2143 * driver specific fixups are also applied.
2146 * Kernel thread context (may sleep)
2149 * 0 on success, -errno otherwise
2151 int ata_dev_configure(struct ata_device *dev)
2153 struct ata_port *ap = dev->link->ap;
2154 struct ata_eh_context *ehc = &dev->link->eh_context;
2155 int print_info = ehc->i.flags & ATA_EHI_PRINTINFO;
2156 const u16 *id = dev->id;
2157 unsigned long xfer_mask;
2158 unsigned int err_mask;
2159 char revbuf[7]; /* XYZ-99\0 */
2160 char fwrevbuf[ATA_ID_FW_REV_LEN+1];
2161 char modelbuf[ATA_ID_PROD_LEN+1];
2164 if (!ata_dev_enabled(dev) && ata_msg_info(ap)) {
2165 ata_dev_info(dev, "%s: ENTER/EXIT -- nodev\n", __func__);
2169 if (ata_msg_probe(ap))
2170 ata_dev_dbg(dev, "%s: ENTER\n", __func__);
2173 dev->horkage |= ata_dev_blacklisted(dev);
2174 ata_force_horkage(dev);
2176 if (dev->horkage & ATA_HORKAGE_DISABLE) {
2177 ata_dev_info(dev, "unsupported device, disabling\n");
2178 ata_dev_disable(dev);
2182 if ((!atapi_enabled || (ap->flags & ATA_FLAG_NO_ATAPI)) &&
2183 dev->class == ATA_DEV_ATAPI) {
2184 ata_dev_warn(dev, "WARNING: ATAPI is %s, device ignored\n",
2185 atapi_enabled ? "not supported with this driver"
2187 ata_dev_disable(dev);
2191 rc = ata_do_link_spd_horkage(dev);
2195 /* let ACPI work its magic */
2196 rc = ata_acpi_on_devcfg(dev);
2200 /* massage HPA, do it early as it might change IDENTIFY data */
2201 rc = ata_hpa_resize(dev);
2205 /* print device capabilities */
2206 if (ata_msg_probe(ap))
2208 "%s: cfg 49:%04x 82:%04x 83:%04x 84:%04x "
2209 "85:%04x 86:%04x 87:%04x 88:%04x\n",
2211 id[49], id[82], id[83], id[84],
2212 id[85], id[86], id[87], id[88]);
2214 /* initialize to-be-configured parameters */
2215 dev->flags &= ~ATA_DFLAG_CFG_MASK;
2216 dev->max_sectors = 0;
2222 dev->multi_count = 0;
2225 * common ATA, ATAPI feature tests
2228 /* find max transfer mode; for printk only */
2229 xfer_mask = ata_id_xfermask(id);
2231 if (ata_msg_probe(ap))
2234 /* SCSI only uses 4-char revisions, dump full 8 chars from ATA */
2235 ata_id_c_string(dev->id, fwrevbuf, ATA_ID_FW_REV,
2238 ata_id_c_string(dev->id, modelbuf, ATA_ID_PROD,
2241 /* ATA-specific feature tests */
2242 if (dev->class == ATA_DEV_ATA) {
2243 if (ata_id_is_cfa(id)) {
2244 /* CPRM may make this media unusable */
2245 if (id[ATA_ID_CFA_KEY_MGMT] & 1)
2247 "supports DRM functions and may not be fully accessible\n");
2248 snprintf(revbuf, 7, "CFA");
2250 snprintf(revbuf, 7, "ATA-%d", ata_id_major_version(id));
2251 /* Warn the user if the device has TPM extensions */
2252 if (ata_id_has_tpm(id))
2254 "supports DRM functions and may not be fully accessible\n");
2257 dev->n_sectors = ata_id_n_sectors(id);
2259 /* get current R/W Multiple count setting */
2260 if ((dev->id[47] >> 8) == 0x80 && (dev->id[59] & 0x100)) {
2261 unsigned int max = dev->id[47] & 0xff;
2262 unsigned int cnt = dev->id[59] & 0xff;
2263 /* only recognize/allow powers of two here */
2264 if (is_power_of_2(max) && is_power_of_2(cnt))
2266 dev->multi_count = cnt;
2269 if (ata_id_has_lba(id)) {
2270 const char *lba_desc;
2274 dev->flags |= ATA_DFLAG_LBA;
2275 if (ata_id_has_lba48(id)) {
2276 dev->flags |= ATA_DFLAG_LBA48;
2279 if (dev->n_sectors >= (1UL << 28) &&
2280 ata_id_has_flush_ext(id))
2281 dev->flags |= ATA_DFLAG_FLUSH_EXT;
2285 rc = ata_dev_config_ncq(dev, ncq_desc, sizeof(ncq_desc));
2289 /* print device info to dmesg */
2290 if (ata_msg_drv(ap) && print_info) {
2291 ata_dev_info(dev, "%s: %s, %s, max %s\n",
2292 revbuf, modelbuf, fwrevbuf,
2293 ata_mode_string(xfer_mask));
2295 "%llu sectors, multi %u: %s %s\n",
2296 (unsigned long long)dev->n_sectors,
2297 dev->multi_count, lba_desc, ncq_desc);
2302 /* Default translation */
2303 dev->cylinders = id[1];
2305 dev->sectors = id[6];
2307 if (ata_id_current_chs_valid(id)) {
2308 /* Current CHS translation is valid. */
2309 dev->cylinders = id[54];
2310 dev->heads = id[55];
2311 dev->sectors = id[56];
2314 /* print device info to dmesg */
2315 if (ata_msg_drv(ap) && print_info) {
2316 ata_dev_info(dev, "%s: %s, %s, max %s\n",
2317 revbuf, modelbuf, fwrevbuf,
2318 ata_mode_string(xfer_mask));
2320 "%llu sectors, multi %u, CHS %u/%u/%u\n",
2321 (unsigned long long)dev->n_sectors,
2322 dev->multi_count, dev->cylinders,
2323 dev->heads, dev->sectors);
2327 /* check and mark DevSlp capability */
2328 if (ata_id_has_devslp(dev->id))
2329 dev->flags |= ATA_DFLAG_DEVSLP;
2331 /* Obtain SATA Settings page from Identify Device Data Log,
2332 * which contains DevSlp timing variables etc.
2333 * Exclude old devices with ata_id_has_ncq()
2335 if (ata_id_has_ncq(dev->id)) {
2336 err_mask = ata_read_log_page(dev,
2337 ATA_LOG_SATA_ID_DEV_DATA,
2338 ATA_LOG_SATA_SETTINGS,
2343 "failed to get Identify Device Data, Emask 0x%x\n",
2350 /* ATAPI-specific feature tests */
2351 else if (dev->class == ATA_DEV_ATAPI) {
2352 const char *cdb_intr_string = "";
2353 const char *atapi_an_string = "";
2354 const char *dma_dir_string = "";
2357 rc = atapi_cdb_len(id);
2358 if ((rc < 12) || (rc > ATAPI_CDB_LEN)) {
2359 if (ata_msg_warn(ap))
2360 ata_dev_warn(dev, "unsupported CDB len\n");
2364 dev->cdb_len = (unsigned int) rc;
2366 /* Enable ATAPI AN if both the host and device have
2367 * the support. If PMP is attached, SNTF is required
2368 * to enable ATAPI AN to discern between PHY status
2369 * changed notifications and ATAPI ANs.
2372 (ap->flags & ATA_FLAG_AN) && ata_id_has_atapi_AN(id) &&
2373 (!sata_pmp_attached(ap) ||
2374 sata_scr_read(&ap->link, SCR_NOTIFICATION, &sntf) == 0)) {
2375 /* issue SET feature command to turn this on */
2376 err_mask = ata_dev_set_feature(dev,
2377 SETFEATURES_SATA_ENABLE, SATA_AN);
2380 "failed to enable ATAPI AN (err_mask=0x%x)\n",
2383 dev->flags |= ATA_DFLAG_AN;
2384 atapi_an_string = ", ATAPI AN";
2388 if (ata_id_cdb_intr(dev->id)) {
2389 dev->flags |= ATA_DFLAG_CDB_INTR;
2390 cdb_intr_string = ", CDB intr";
2393 if (atapi_dmadir || atapi_id_dmadir(dev->id)) {
2394 dev->flags |= ATA_DFLAG_DMADIR;
2395 dma_dir_string = ", DMADIR";
2398 if (ata_id_has_da(dev->id))
2399 dev->flags |= ATA_DFLAG_DA;
2401 /* print device info to dmesg */
2402 if (ata_msg_drv(ap) && print_info)
2404 "ATAPI: %s, %s, max %s%s%s%s\n",
2406 ata_mode_string(xfer_mask),
2407 cdb_intr_string, atapi_an_string,
2411 /* determine max_sectors */
2412 dev->max_sectors = ATA_MAX_SECTORS;
2413 if (dev->flags & ATA_DFLAG_LBA48)
2414 dev->max_sectors = ATA_MAX_SECTORS_LBA48;
2416 /* Limit PATA drive on SATA cable bridge transfers to udma5,
2418 if (ata_dev_knobble(dev)) {
2419 if (ata_msg_drv(ap) && print_info)
2420 ata_dev_info(dev, "applying bridge limits\n");
2421 dev->udma_mask &= ATA_UDMA5;
2422 dev->max_sectors = ATA_MAX_SECTORS;
2425 if ((dev->class == ATA_DEV_ATAPI) &&
2426 (atapi_command_packet_set(id) == TYPE_TAPE)) {
2427 dev->max_sectors = ATA_MAX_SECTORS_TAPE;
2428 dev->horkage |= ATA_HORKAGE_STUCK_ERR;
2431 if (dev->horkage & ATA_HORKAGE_MAX_SEC_128)
2432 dev->max_sectors = min_t(unsigned int, ATA_MAX_SECTORS_128,
2435 if (ap->ops->dev_config)
2436 ap->ops->dev_config(dev);
2438 if (dev->horkage & ATA_HORKAGE_DIAGNOSTIC) {
2439 /* Let the user know. We don't want to disallow opens for
2440 rescue purposes, or in case the vendor is just a blithering
2441 idiot. Do this after the dev_config call as some controllers
2442 with buggy firmware may want to avoid reporting false device
2447 "Drive reports diagnostics failure. This may indicate a drive\n");
2449 "fault or invalid emulation. Contact drive vendor for information.\n");
2453 if ((dev->horkage & ATA_HORKAGE_FIRMWARE_WARN) && print_info) {
2454 ata_dev_warn(dev, "WARNING: device requires firmware update to be fully functional\n");
2455 ata_dev_warn(dev, " contact the vendor or visit http://ata.wiki.kernel.org\n");
2461 if (ata_msg_probe(ap))
2462 ata_dev_dbg(dev, "%s: EXIT, err\n", __func__);
2467 * ata_cable_40wire - return 40 wire cable type
2470 * Helper method for drivers which want to hardwire 40 wire cable
2474 int ata_cable_40wire(struct ata_port *ap)
2476 return ATA_CBL_PATA40;
2480 * ata_cable_80wire - return 80 wire cable type
2483 * Helper method for drivers which want to hardwire 80 wire cable
2487 int ata_cable_80wire(struct ata_port *ap)
2489 return ATA_CBL_PATA80;
2493 * ata_cable_unknown - return unknown PATA cable.
2496 * Helper method for drivers which have no PATA cable detection.
2499 int ata_cable_unknown(struct ata_port *ap)
2501 return ATA_CBL_PATA_UNK;
2505 * ata_cable_ignore - return ignored PATA cable.
2508 * Helper method for drivers which don't use cable type to limit
2511 int ata_cable_ignore(struct ata_port *ap)
2513 return ATA_CBL_PATA_IGN;
2517 * ata_cable_sata - return SATA cable type
2520 * Helper method for drivers which have SATA cables
2523 int ata_cable_sata(struct ata_port *ap)
2525 return ATA_CBL_SATA;
2529 * ata_bus_probe - Reset and probe ATA bus
2532 * Master ATA bus probing function. Initiates a hardware-dependent
2533 * bus reset, then attempts to identify any devices found on
2537 * PCI/etc. bus probe sem.
2540 * Zero on success, negative errno otherwise.
2543 int ata_bus_probe(struct ata_port *ap)
2545 unsigned int classes[ATA_MAX_DEVICES];
2546 int tries[ATA_MAX_DEVICES];
2548 struct ata_device *dev;
2550 ata_for_each_dev(dev, &ap->link, ALL)
2551 tries[dev->devno] = ATA_PROBE_MAX_TRIES;
2554 ata_for_each_dev(dev, &ap->link, ALL) {
2555 /* If we issue an SRST then an ATA drive (not ATAPI)
2556 * may change configuration and be in PIO0 timing. If
2557 * we do a hard reset (or are coming from power on)
2558 * this is true for ATA or ATAPI. Until we've set a
2559 * suitable controller mode we should not touch the
2560 * bus as we may be talking too fast.
2562 dev->pio_mode = XFER_PIO_0;
2564 /* If the controller has a pio mode setup function
2565 * then use it to set the chipset to rights. Don't
2566 * touch the DMA setup as that will be dealt with when
2567 * configuring devices.
2569 if (ap->ops->set_piomode)
2570 ap->ops->set_piomode(ap, dev);
2573 /* reset and determine device classes */
2574 ap->ops->phy_reset(ap);
2576 ata_for_each_dev(dev, &ap->link, ALL) {
2577 if (dev->class != ATA_DEV_UNKNOWN)
2578 classes[dev->devno] = dev->class;
2580 classes[dev->devno] = ATA_DEV_NONE;
2582 dev->class = ATA_DEV_UNKNOWN;
2585 /* read IDENTIFY page and configure devices. We have to do the identify
2586 specific sequence bass-ackwards so that PDIAG- is released by
2589 ata_for_each_dev(dev, &ap->link, ALL_REVERSE) {
2590 if (tries[dev->devno])
2591 dev->class = classes[dev->devno];
2593 if (!ata_dev_enabled(dev))
2596 rc = ata_dev_read_id(dev, &dev->class, ATA_READID_POSTRESET,
2602 /* Now ask for the cable type as PDIAG- should have been released */
2603 if (ap->ops->cable_detect)
2604 ap->cbl = ap->ops->cable_detect(ap);
2606 /* We may have SATA bridge glue hiding here irrespective of
2607 * the reported cable types and sensed types. When SATA
2608 * drives indicate we have a bridge, we don't know which end
2609 * of the link the bridge is which is a problem.
2611 ata_for_each_dev(dev, &ap->link, ENABLED)
2612 if (ata_id_is_sata(dev->id))
2613 ap->cbl = ATA_CBL_SATA;
2615 /* After the identify sequence we can now set up the devices. We do
2616 this in the normal order so that the user doesn't get confused */
2618 ata_for_each_dev(dev, &ap->link, ENABLED) {
2619 ap->link.eh_context.i.flags |= ATA_EHI_PRINTINFO;
2620 rc = ata_dev_configure(dev);
2621 ap->link.eh_context.i.flags &= ~ATA_EHI_PRINTINFO;
2626 /* configure transfer mode */
2627 rc = ata_set_mode(&ap->link, &dev);
2631 ata_for_each_dev(dev, &ap->link, ENABLED)
2637 tries[dev->devno]--;
2641 /* eeek, something went very wrong, give up */
2642 tries[dev->devno] = 0;
2646 /* give it just one more chance */
2647 tries[dev->devno] = min(tries[dev->devno], 1);
2649 if (tries[dev->devno] == 1) {
2650 /* This is the last chance, better to slow
2651 * down than lose it.
2653 sata_down_spd_limit(&ap->link, 0);
2654 ata_down_xfermask_limit(dev, ATA_DNXFER_PIO);
2658 if (!tries[dev->devno])
2659 ata_dev_disable(dev);
2665 * sata_print_link_status - Print SATA link status
2666 * @link: SATA link to printk link status about
2668 * This function prints link speed and status of a SATA link.
2673 static void sata_print_link_status(struct ata_link *link)
2675 u32 sstatus, scontrol, tmp;
2677 if (sata_scr_read(link, SCR_STATUS, &sstatus))
2679 sata_scr_read(link, SCR_CONTROL, &scontrol);
2681 if (ata_phys_link_online(link)) {
2682 tmp = (sstatus >> 4) & 0xf;
2683 ata_link_info(link, "SATA link up %s (SStatus %X SControl %X)\n",
2684 sata_spd_string(tmp), sstatus, scontrol);
2686 ata_link_info(link, "SATA link down (SStatus %X SControl %X)\n",
2692 * ata_dev_pair - return other device on cable
2695 * Obtain the other device on the same cable, or if none is
2696 * present NULL is returned
2699 struct ata_device *ata_dev_pair(struct ata_device *adev)
2701 struct ata_link *link = adev->link;
2702 struct ata_device *pair = &link->device[1 - adev->devno];
2703 if (!ata_dev_enabled(pair))
2709 * sata_down_spd_limit - adjust SATA spd limit downward
2710 * @link: Link to adjust SATA spd limit for
2711 * @spd_limit: Additional limit
2713 * Adjust SATA spd limit of @link downward. Note that this
2714 * function only adjusts the limit. The change must be applied
2715 * using sata_set_spd().
2717 * If @spd_limit is non-zero, the speed is limited to equal to or
2718 * lower than @spd_limit if such speed is supported. If
2719 * @spd_limit is slower than any supported speed, only the lowest
2720 * supported speed is allowed.
2723 * Inherited from caller.
2726 * 0 on success, negative errno on failure
2728 int sata_down_spd_limit(struct ata_link *link, u32 spd_limit)
2730 u32 sstatus, spd, mask;
2733 if (!sata_scr_valid(link))
2736 /* If SCR can be read, use it to determine the current SPD.
2737 * If not, use cached value in link->sata_spd.
2739 rc = sata_scr_read(link, SCR_STATUS, &sstatus);
2740 if (rc == 0 && ata_sstatus_online(sstatus))
2741 spd = (sstatus >> 4) & 0xf;
2743 spd = link->sata_spd;
2745 mask = link->sata_spd_limit;
2749 /* unconditionally mask off the highest bit */
2750 bit = fls(mask) - 1;
2751 mask &= ~(1 << bit);
2753 /* Mask off all speeds higher than or equal to the current
2754 * one. Force 1.5Gbps if current SPD is not available.
2757 mask &= (1 << (spd - 1)) - 1;
2761 /* were we already at the bottom? */
2766 if (mask & ((1 << spd_limit) - 1))
2767 mask &= (1 << spd_limit) - 1;
2769 bit = ffs(mask) - 1;
2774 link->sata_spd_limit = mask;
2776 ata_link_warn(link, "limiting SATA link speed to %s\n",
2777 sata_spd_string(fls(mask)));
2782 static int __sata_set_spd_needed(struct ata_link *link, u32 *scontrol)
2784 struct ata_link *host_link = &link->ap->link;
2785 u32 limit, target, spd;
2787 limit = link->sata_spd_limit;
2789 /* Don't configure downstream link faster than upstream link.
2790 * It doesn't speed up anything and some PMPs choke on such
2793 if (!ata_is_host_link(link) && host_link->sata_spd)
2794 limit &= (1 << host_link->sata_spd) - 1;
2796 if (limit == UINT_MAX)
2799 target = fls(limit);
2801 spd = (*scontrol >> 4) & 0xf;
2802 *scontrol = (*scontrol & ~0xf0) | ((target & 0xf) << 4);
2804 return spd != target;
2808 * sata_set_spd_needed - is SATA spd configuration needed
2809 * @link: Link in question
2811 * Test whether the spd limit in SControl matches
2812 * @link->sata_spd_limit. This function is used to determine
2813 * whether hardreset is necessary to apply SATA spd
2817 * Inherited from caller.
2820 * 1 if SATA spd configuration is needed, 0 otherwise.
2822 static int sata_set_spd_needed(struct ata_link *link)
2826 if (sata_scr_read(link, SCR_CONTROL, &scontrol))
2829 return __sata_set_spd_needed(link, &scontrol);
2833 * sata_set_spd - set SATA spd according to spd limit
2834 * @link: Link to set SATA spd for
2836 * Set SATA spd of @link according to sata_spd_limit.
2839 * Inherited from caller.
2842 * 0 if spd doesn't need to be changed, 1 if spd has been
2843 * changed. Negative errno if SCR registers are inaccessible.
2845 int sata_set_spd(struct ata_link *link)
2850 if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
2853 if (!__sata_set_spd_needed(link, &scontrol))
2856 if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol)))
2863 * This mode timing computation functionality is ported over from
2864 * drivers/ide/ide-timing.h and was originally written by Vojtech Pavlik
2867 * PIO 0-4, MWDMA 0-2 and UDMA 0-6 timings (in nanoseconds).
2868 * These were taken from ATA/ATAPI-6 standard, rev 0a, except
2869 * for UDMA6, which is currently supported only by Maxtor drives.
2871 * For PIO 5/6 MWDMA 3/4 see the CFA specification 3.0.
2874 static const struct ata_timing ata_timing[] = {
2875 /* { XFER_PIO_SLOW, 120, 290, 240, 960, 290, 240, 0, 960, 0 }, */
2876 { XFER_PIO_0, 70, 290, 240, 600, 165, 150, 0, 600, 0 },
2877 { XFER_PIO_1, 50, 290, 93, 383, 125, 100, 0, 383, 0 },
2878 { XFER_PIO_2, 30, 290, 40, 330, 100, 90, 0, 240, 0 },
2879 { XFER_PIO_3, 30, 80, 70, 180, 80, 70, 0, 180, 0 },
2880 { XFER_PIO_4, 25, 70, 25, 120, 70, 25, 0, 120, 0 },
2881 { XFER_PIO_5, 15, 65, 25, 100, 65, 25, 0, 100, 0 },
2882 { XFER_PIO_6, 10, 55, 20, 80, 55, 20, 0, 80, 0 },
2884 { XFER_SW_DMA_0, 120, 0, 0, 0, 480, 480, 50, 960, 0 },
2885 { XFER_SW_DMA_1, 90, 0, 0, 0, 240, 240, 30, 480, 0 },
2886 { XFER_SW_DMA_2, 60, 0, 0, 0, 120, 120, 20, 240, 0 },
2888 { XFER_MW_DMA_0, 60, 0, 0, 0, 215, 215, 20, 480, 0 },
2889 { XFER_MW_DMA_1, 45, 0, 0, 0, 80, 50, 5, 150, 0 },
2890 { XFER_MW_DMA_2, 25, 0, 0, 0, 70, 25, 5, 120, 0 },
2891 { XFER_MW_DMA_3, 25, 0, 0, 0, 65, 25, 5, 100, 0 },
2892 { XFER_MW_DMA_4, 25, 0, 0, 0, 55, 20, 5, 80, 0 },
2894 /* { XFER_UDMA_SLOW, 0, 0, 0, 0, 0, 0, 0, 0, 150 }, */
2895 { XFER_UDMA_0, 0, 0, 0, 0, 0, 0, 0, 0, 120 },
2896 { XFER_UDMA_1, 0, 0, 0, 0, 0, 0, 0, 0, 80 },
2897 { XFER_UDMA_2, 0, 0, 0, 0, 0, 0, 0, 0, 60 },
2898 { XFER_UDMA_3, 0, 0, 0, 0, 0, 0, 0, 0, 45 },
2899 { XFER_UDMA_4, 0, 0, 0, 0, 0, 0, 0, 0, 30 },
2900 { XFER_UDMA_5, 0, 0, 0, 0, 0, 0, 0, 0, 20 },
2901 { XFER_UDMA_6, 0, 0, 0, 0, 0, 0, 0, 0, 15 },
2906 #define ENOUGH(v, unit) (((v)-1)/(unit)+1)
2907 #define EZ(v, unit) ((v)?ENOUGH(v, unit):0)
2909 static void ata_timing_quantize(const struct ata_timing *t, struct ata_timing *q, int T, int UT)
2911 q->setup = EZ(t->setup * 1000, T);
2912 q->act8b = EZ(t->act8b * 1000, T);
2913 q->rec8b = EZ(t->rec8b * 1000, T);
2914 q->cyc8b = EZ(t->cyc8b * 1000, T);
2915 q->active = EZ(t->active * 1000, T);
2916 q->recover = EZ(t->recover * 1000, T);
2917 q->dmack_hold = EZ(t->dmack_hold * 1000, T);
2918 q->cycle = EZ(t->cycle * 1000, T);
2919 q->udma = EZ(t->udma * 1000, UT);
2922 void ata_timing_merge(const struct ata_timing *a, const struct ata_timing *b,
2923 struct ata_timing *m, unsigned int what)
2925 if (what & ATA_TIMING_SETUP ) m->setup = max(a->setup, b->setup);
2926 if (what & ATA_TIMING_ACT8B ) m->act8b = max(a->act8b, b->act8b);
2927 if (what & ATA_TIMING_REC8B ) m->rec8b = max(a->rec8b, b->rec8b);
2928 if (what & ATA_TIMING_CYC8B ) m->cyc8b = max(a->cyc8b, b->cyc8b);
2929 if (what & ATA_TIMING_ACTIVE ) m->active = max(a->active, b->active);
2930 if (what & ATA_TIMING_RECOVER) m->recover = max(a->recover, b->recover);
2931 if (what & ATA_TIMING_DMACK_HOLD) m->dmack_hold = max(a->dmack_hold, b->dmack_hold);
2932 if (what & ATA_TIMING_CYCLE ) m->cycle = max(a->cycle, b->cycle);
2933 if (what & ATA_TIMING_UDMA ) m->udma = max(a->udma, b->udma);
2936 const struct ata_timing *ata_timing_find_mode(u8 xfer_mode)
2938 const struct ata_timing *t = ata_timing;
2940 while (xfer_mode > t->mode)
2943 if (xfer_mode == t->mode)
2948 int ata_timing_compute(struct ata_device *adev, unsigned short speed,
2949 struct ata_timing *t, int T, int UT)
2951 const u16 *id = adev->id;
2952 const struct ata_timing *s;
2953 struct ata_timing p;
2959 if (!(s = ata_timing_find_mode(speed)))
2962 memcpy(t, s, sizeof(*s));
2965 * If the drive is an EIDE drive, it can tell us it needs extended
2966 * PIO/MW_DMA cycle timing.
2969 if (id[ATA_ID_FIELD_VALID] & 2) { /* EIDE drive */
2970 memset(&p, 0, sizeof(p));
2972 if (speed >= XFER_PIO_0 && speed < XFER_SW_DMA_0) {
2973 if (speed <= XFER_PIO_2)
2974 p.cycle = p.cyc8b = id[ATA_ID_EIDE_PIO];
2975 else if ((speed <= XFER_PIO_4) ||
2976 (speed == XFER_PIO_5 && !ata_id_is_cfa(id)))
2977 p.cycle = p.cyc8b = id[ATA_ID_EIDE_PIO_IORDY];
2978 } else if (speed >= XFER_MW_DMA_0 && speed <= XFER_MW_DMA_2)
2979 p.cycle = id[ATA_ID_EIDE_DMA_MIN];
2981 ata_timing_merge(&p, t, t, ATA_TIMING_CYCLE | ATA_TIMING_CYC8B);
2985 * Convert the timing to bus clock counts.
2988 ata_timing_quantize(t, t, T, UT);
2991 * Even in DMA/UDMA modes we still use PIO access for IDENTIFY,
2992 * S.M.A.R.T * and some other commands. We have to ensure that the
2993 * DMA cycle timing is slower/equal than the fastest PIO timing.
2996 if (speed > XFER_PIO_6) {
2997 ata_timing_compute(adev, adev->pio_mode, &p, T, UT);
2998 ata_timing_merge(&p, t, t, ATA_TIMING_ALL);
3002 * Lengthen active & recovery time so that cycle time is correct.
3005 if (t->act8b + t->rec8b < t->cyc8b) {
3006 t->act8b += (t->cyc8b - (t->act8b + t->rec8b)) / 2;
3007 t->rec8b = t->cyc8b - t->act8b;
3010 if (t->active + t->recover < t->cycle) {
3011 t->active += (t->cycle - (t->active + t->recover)) / 2;
3012 t->recover = t->cycle - t->active;
3015 /* In a few cases quantisation may produce enough errors to
3016 leave t->cycle too low for the sum of active and recovery
3017 if so we must correct this */
3018 if (t->active + t->recover > t->cycle)
3019 t->cycle = t->active + t->recover;
3025 * ata_timing_cycle2mode - find xfer mode for the specified cycle duration
3026 * @xfer_shift: ATA_SHIFT_* value for transfer type to examine.
3027 * @cycle: cycle duration in ns
3029 * Return matching xfer mode for @cycle. The returned mode is of
3030 * the transfer type specified by @xfer_shift. If @cycle is too
3031 * slow for @xfer_shift, 0xff is returned. If @cycle is faster
3032 * than the fastest known mode, the fasted mode is returned.
3038 * Matching xfer_mode, 0xff if no match found.
3040 u8 ata_timing_cycle2mode(unsigned int xfer_shift, int cycle)
3042 u8 base_mode = 0xff, last_mode = 0xff;
3043 const struct ata_xfer_ent *ent;
3044 const struct ata_timing *t;
3046 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
3047 if (ent->shift == xfer_shift)
3048 base_mode = ent->base;
3050 for (t = ata_timing_find_mode(base_mode);
3051 t && ata_xfer_mode2shift(t->mode) == xfer_shift; t++) {
3052 unsigned short this_cycle;
3054 switch (xfer_shift) {
3056 case ATA_SHIFT_MWDMA:
3057 this_cycle = t->cycle;
3059 case ATA_SHIFT_UDMA:
3060 this_cycle = t->udma;
3066 if (cycle > this_cycle)
3069 last_mode = t->mode;
3076 * ata_down_xfermask_limit - adjust dev xfer masks downward
3077 * @dev: Device to adjust xfer masks
3078 * @sel: ATA_DNXFER_* selector
3080 * Adjust xfer masks of @dev downward. Note that this function
3081 * does not apply the change. Invoking ata_set_mode() afterwards
3082 * will apply the limit.
3085 * Inherited from caller.
3088 * 0 on success, negative errno on failure
3090 int ata_down_xfermask_limit(struct ata_device *dev, unsigned int sel)
3093 unsigned long orig_mask, xfer_mask;
3094 unsigned long pio_mask, mwdma_mask, udma_mask;
3097 quiet = !!(sel & ATA_DNXFER_QUIET);
3098 sel &= ~ATA_DNXFER_QUIET;
3100 xfer_mask = orig_mask = ata_pack_xfermask(dev->pio_mask,
3103 ata_unpack_xfermask(xfer_mask, &pio_mask, &mwdma_mask, &udma_mask);
3106 case ATA_DNXFER_PIO:
3107 highbit = fls(pio_mask) - 1;
3108 pio_mask &= ~(1 << highbit);
3111 case ATA_DNXFER_DMA:
3113 highbit = fls(udma_mask) - 1;
3114 udma_mask &= ~(1 << highbit);
3117 } else if (mwdma_mask) {
3118 highbit = fls(mwdma_mask) - 1;
3119 mwdma_mask &= ~(1 << highbit);
3125 case ATA_DNXFER_40C:
3126 udma_mask &= ATA_UDMA_MASK_40C;
3129 case ATA_DNXFER_FORCE_PIO0:
3131 case ATA_DNXFER_FORCE_PIO:
3140 xfer_mask &= ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask);
3142 if (!(xfer_mask & ATA_MASK_PIO) || xfer_mask == orig_mask)
3146 if (xfer_mask & (ATA_MASK_MWDMA | ATA_MASK_UDMA))
3147 snprintf(buf, sizeof(buf), "%s:%s",
3148 ata_mode_string(xfer_mask),
3149 ata_mode_string(xfer_mask & ATA_MASK_PIO));
3151 snprintf(buf, sizeof(buf), "%s",
3152 ata_mode_string(xfer_mask));
3154 ata_dev_warn(dev, "limiting speed to %s\n", buf);
3157 ata_unpack_xfermask(xfer_mask, &dev->pio_mask, &dev->mwdma_mask,
3163 static int ata_dev_set_mode(struct ata_device *dev)
3165 struct ata_port *ap = dev->link->ap;
3166 struct ata_eh_context *ehc = &dev->link->eh_context;
3167 const bool nosetxfer = dev->horkage & ATA_HORKAGE_NOSETXFER;
3168 const char *dev_err_whine = "";
3169 int ign_dev_err = 0;
3170 unsigned int err_mask = 0;
3173 dev->flags &= ~ATA_DFLAG_PIO;
3174 if (dev->xfer_shift == ATA_SHIFT_PIO)
3175 dev->flags |= ATA_DFLAG_PIO;
3177 if (nosetxfer && ap->flags & ATA_FLAG_SATA && ata_id_is_sata(dev->id))
3178 dev_err_whine = " (SET_XFERMODE skipped)";
3182 "NOSETXFER but PATA detected - can't "
3183 "skip SETXFER, might malfunction\n");
3184 err_mask = ata_dev_set_xfermode(dev);
3187 if (err_mask & ~AC_ERR_DEV)
3191 ehc->i.flags |= ATA_EHI_POST_SETMODE;
3192 rc = ata_dev_revalidate(dev, ATA_DEV_UNKNOWN, 0);
3193 ehc->i.flags &= ~ATA_EHI_POST_SETMODE;
3197 if (dev->xfer_shift == ATA_SHIFT_PIO) {
3198 /* Old CFA may refuse this command, which is just fine */
3199 if (ata_id_is_cfa(dev->id))
3201 /* Catch several broken garbage emulations plus some pre
3203 if (ata_id_major_version(dev->id) == 0 &&
3204 dev->pio_mode <= XFER_PIO_2)
3206 /* Some very old devices and some bad newer ones fail
3207 any kind of SET_XFERMODE request but support PIO0-2
3208 timings and no IORDY */
3209 if (!ata_id_has_iordy(dev->id) && dev->pio_mode <= XFER_PIO_2)
3212 /* Early MWDMA devices do DMA but don't allow DMA mode setting.
3213 Don't fail an MWDMA0 set IFF the device indicates it is in MWDMA0 */
3214 if (dev->xfer_shift == ATA_SHIFT_MWDMA &&
3215 dev->dma_mode == XFER_MW_DMA_0 &&
3216 (dev->id[63] >> 8) & 1)
3219 /* if the device is actually configured correctly, ignore dev err */
3220 if (dev->xfer_mode == ata_xfer_mask2mode(ata_id_xfermask(dev->id)))
3223 if (err_mask & AC_ERR_DEV) {
3227 dev_err_whine = " (device error ignored)";
3230 DPRINTK("xfer_shift=%u, xfer_mode=0x%x\n",
3231 dev->xfer_shift, (int)dev->xfer_mode);
3233 ata_dev_info(dev, "configured for %s%s\n",
3234 ata_mode_string(ata_xfer_mode2mask(dev->xfer_mode)),
3240 ata_dev_err(dev, "failed to set xfermode (err_mask=0x%x)\n", err_mask);
3245 * ata_do_set_mode - Program timings and issue SET FEATURES - XFER
3246 * @link: link on which timings will be programmed
3247 * @r_failed_dev: out parameter for failed device
3249 * Standard implementation of the function used to tune and set
3250 * ATA device disk transfer mode (PIO3, UDMA6, etc.). If
3251 * ata_dev_set_mode() fails, pointer to the failing device is
3252 * returned in @r_failed_dev.
3255 * PCI/etc. bus probe sem.
3258 * 0 on success, negative errno otherwise
3261 int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev)
3263 struct ata_port *ap = link->ap;
3264 struct ata_device *dev;
3265 int rc = 0, used_dma = 0, found = 0;
3267 /* step 1: calculate xfer_mask */
3268 ata_for_each_dev(dev, link, ENABLED) {
3269 unsigned long pio_mask, dma_mask;
3270 unsigned int mode_mask;
3272 mode_mask = ATA_DMA_MASK_ATA;
3273 if (dev->class == ATA_DEV_ATAPI)
3274 mode_mask = ATA_DMA_MASK_ATAPI;
3275 else if (ata_id_is_cfa(dev->id))
3276 mode_mask = ATA_DMA_MASK_CFA;
3278 ata_dev_xfermask(dev);
3279 ata_force_xfermask(dev);
3281 pio_mask = ata_pack_xfermask(dev->pio_mask, 0, 0);
3283 if (libata_dma_mask & mode_mask)
3284 dma_mask = ata_pack_xfermask(0, dev->mwdma_mask,
3289 dev->pio_mode = ata_xfer_mask2mode(pio_mask);
3290 dev->dma_mode = ata_xfer_mask2mode(dma_mask);
3293 if (ata_dma_enabled(dev))
3299 /* step 2: always set host PIO timings */
3300 ata_for_each_dev(dev, link, ENABLED) {
3301 if (dev->pio_mode == 0xff) {
3302 ata_dev_warn(dev, "no PIO support\n");
3307 dev->xfer_mode = dev->pio_mode;
3308 dev->xfer_shift = ATA_SHIFT_PIO;
3309 if (ap->ops->set_piomode)
3310 ap->ops->set_piomode(ap, dev);
3313 /* step 3: set host DMA timings */
3314 ata_for_each_dev(dev, link, ENABLED) {
3315 if (!ata_dma_enabled(dev))
3318 dev->xfer_mode = dev->dma_mode;
3319 dev->xfer_shift = ata_xfer_mode2shift(dev->dma_mode);
3320 if (ap->ops->set_dmamode)
3321 ap->ops->set_dmamode(ap, dev);
3324 /* step 4: update devices' xfer mode */
3325 ata_for_each_dev(dev, link, ENABLED) {
3326 rc = ata_dev_set_mode(dev);
3331 /* Record simplex status. If we selected DMA then the other
3332 * host channels are not permitted to do so.
3334 if (used_dma && (ap->host->flags & ATA_HOST_SIMPLEX))
3335 ap->host->simplex_claimed = ap;
3339 *r_failed_dev = dev;
3344 * ata_wait_ready - wait for link to become ready
3345 * @link: link to be waited on
3346 * @deadline: deadline jiffies for the operation
3347 * @check_ready: callback to check link readiness
3349 * Wait for @link to become ready. @check_ready should return
3350 * positive number if @link is ready, 0 if it isn't, -ENODEV if
3351 * link doesn't seem to be occupied, other errno for other error
3354 * Transient -ENODEV conditions are allowed for
3355 * ATA_TMOUT_FF_WAIT.
3361 * 0 if @linke is ready before @deadline; otherwise, -errno.
3363 int ata_wait_ready(struct ata_link *link, unsigned long deadline,
3364 int (*check_ready)(struct ata_link *link))
3366 unsigned long start = jiffies;
3367 unsigned long nodev_deadline;
3370 /* choose which 0xff timeout to use, read comment in libata.h */
3371 if (link->ap->host->flags & ATA_HOST_PARALLEL_SCAN)
3372 nodev_deadline = ata_deadline(start, ATA_TMOUT_FF_WAIT_LONG);
3374 nodev_deadline = ata_deadline(start, ATA_TMOUT_FF_WAIT);
3376 /* Slave readiness can't be tested separately from master. On
3377 * M/S emulation configuration, this function should be called
3378 * only on the master and it will handle both master and slave.
3380 WARN_ON(link == link->ap->slave_link);
3382 if (time_after(nodev_deadline, deadline))
3383 nodev_deadline = deadline;
3386 unsigned long now = jiffies;
3389 ready = tmp = check_ready(link);
3394 * -ENODEV could be transient. Ignore -ENODEV if link
3395 * is online. Also, some SATA devices take a long
3396 * time to clear 0xff after reset. Wait for
3397 * ATA_TMOUT_FF_WAIT[_LONG] on -ENODEV if link isn't
3400 * Note that some PATA controllers (pata_ali) explode
3401 * if status register is read more than once when
3402 * there's no device attached.
3404 if (ready == -ENODEV) {
3405 if (ata_link_online(link))
3407 else if ((link->ap->flags & ATA_FLAG_SATA) &&
3408 !ata_link_offline(link) &&
3409 time_before(now, nodev_deadline))
3415 if (time_after(now, deadline))
3418 if (!warned && time_after(now, start + 5 * HZ) &&
3419 (deadline - now > 3 * HZ)) {
3421 "link is slow to respond, please be patient "
3422 "(ready=%d)\n", tmp);
3426 ata_msleep(link->ap, 50);
3431 * ata_wait_after_reset - wait for link to become ready after reset
3432 * @link: link to be waited on
3433 * @deadline: deadline jiffies for the operation
3434 * @check_ready: callback to check link readiness
3436 * Wait for @link to become ready after reset.
3442 * 0 if @linke is ready before @deadline; otherwise, -errno.
3444 int ata_wait_after_reset(struct ata_link *link, unsigned long deadline,
3445 int (*check_ready)(struct ata_link *link))
3447 ata_msleep(link->ap, ATA_WAIT_AFTER_RESET);
3449 return ata_wait_ready(link, deadline, check_ready);
3453 * sata_link_debounce - debounce SATA phy status
3454 * @link: ATA link to debounce SATA phy status for
3455 * @params: timing parameters { interval, duratinon, timeout } in msec
3456 * @deadline: deadline jiffies for the operation
3458 * Make sure SStatus of @link reaches stable state, determined by
3459 * holding the same value where DET is not 1 for @duration polled
3460 * every @interval, before @timeout. Timeout constraints the
3461 * beginning of the stable state. Because DET gets stuck at 1 on
3462 * some controllers after hot unplugging, this functions waits
3463 * until timeout then returns 0 if DET is stable at 1.
3465 * @timeout is further limited by @deadline. The sooner of the
3469 * Kernel thread context (may sleep)
3472 * 0 on success, -errno on failure.
3474 int sata_link_debounce(struct ata_link *link, const unsigned long *params,
3475 unsigned long deadline)
3477 unsigned long interval = params[0];
3478 unsigned long duration = params[1];
3479 unsigned long last_jiffies, t;
3483 t = ata_deadline(jiffies, params[2]);
3484 if (time_before(t, deadline))
3487 if ((rc = sata_scr_read(link, SCR_STATUS, &cur)))
3492 last_jiffies = jiffies;
3495 ata_msleep(link->ap, interval);
3496 if ((rc = sata_scr_read(link, SCR_STATUS, &cur)))
3502 if (cur == 1 && time_before(jiffies, deadline))
3504 if (time_after(jiffies,
3505 ata_deadline(last_jiffies, duration)))
3510 /* unstable, start over */
3512 last_jiffies = jiffies;
3514 /* Check deadline. If debouncing failed, return
3515 * -EPIPE to tell upper layer to lower link speed.
3517 if (time_after(jiffies, deadline))
3523 * sata_link_resume - resume SATA link
3524 * @link: ATA link to resume SATA
3525 * @params: timing parameters { interval, duratinon, timeout } in msec
3526 * @deadline: deadline jiffies for the operation
3528 * Resume SATA phy @link and debounce it.
3531 * Kernel thread context (may sleep)
3534 * 0 on success, -errno on failure.
3536 int sata_link_resume(struct ata_link *link, const unsigned long *params,
3537 unsigned long deadline)
3539 int tries = ATA_LINK_RESUME_TRIES;
3540 u32 scontrol, serror;
3543 if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
3547 * Writes to SControl sometimes get ignored under certain
3548 * controllers (ata_piix SIDPR). Make sure DET actually is
3552 scontrol = (scontrol & 0x0f0) | 0x300;
3553 if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol)))
3556 * Some PHYs react badly if SStatus is pounded
3557 * immediately after resuming. Delay 200ms before
3560 ata_msleep(link->ap, 200);
3562 /* is SControl restored correctly? */
3563 if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
3565 } while ((scontrol & 0xf0f) != 0x300 && --tries);
3567 if ((scontrol & 0xf0f) != 0x300) {
3568 ata_link_warn(link, "failed to resume link (SControl %X)\n",
3573 if (tries < ATA_LINK_RESUME_TRIES)
3574 ata_link_warn(link, "link resume succeeded after %d retries\n",
3575 ATA_LINK_RESUME_TRIES - tries);
3577 if ((rc = sata_link_debounce(link, params, deadline)))
3580 /* clear SError, some PHYs require this even for SRST to work */
3581 if (!(rc = sata_scr_read(link, SCR_ERROR, &serror)))
3582 rc = sata_scr_write(link, SCR_ERROR, serror);
3584 return rc != -EINVAL ? rc : 0;
3588 * sata_link_scr_lpm - manipulate SControl IPM and SPM fields
3589 * @link: ATA link to manipulate SControl for
3590 * @policy: LPM policy to configure
3591 * @spm_wakeup: initiate LPM transition to active state
3593 * Manipulate the IPM field of the SControl register of @link
3594 * according to @policy. If @policy is ATA_LPM_MAX_POWER and
3595 * @spm_wakeup is %true, the SPM field is manipulated to wake up
3596 * the link. This function also clears PHYRDY_CHG before
3603 * 0 on succes, -errno otherwise.
3605 int sata_link_scr_lpm(struct ata_link *link, enum ata_lpm_policy policy,
3608 struct ata_eh_context *ehc = &link->eh_context;
3609 bool woken_up = false;
3613 rc = sata_scr_read(link, SCR_CONTROL, &scontrol);
3618 case ATA_LPM_MAX_POWER:
3619 /* disable all LPM transitions */
3620 scontrol |= (0x7 << 8);
3621 /* initiate transition to active state */
3623 scontrol |= (0x4 << 12);
3627 case ATA_LPM_MED_POWER:
3628 /* allow LPM to PARTIAL */
3629 scontrol &= ~(0x1 << 8);
3630 scontrol |= (0x6 << 8);
3632 case ATA_LPM_MIN_POWER:
3633 if (ata_link_nr_enabled(link) > 0)
3634 /* no restrictions on LPM transitions */
3635 scontrol &= ~(0x7 << 8);
3637 /* empty port, power off */
3639 scontrol |= (0x1 << 2);
3646 rc = sata_scr_write(link, SCR_CONTROL, scontrol);
3650 /* give the link time to transit out of LPM state */
3654 /* clear PHYRDY_CHG from SError */
3655 ehc->i.serror &= ~SERR_PHYRDY_CHG;
3656 return sata_scr_write(link, SCR_ERROR, SERR_PHYRDY_CHG);
3660 * ata_std_prereset - prepare for reset
3661 * @link: ATA link to be reset
3662 * @deadline: deadline jiffies for the operation
3664 * @link is about to be reset. Initialize it. Failure from
3665 * prereset makes libata abort whole reset sequence and give up
3666 * that port, so prereset should be best-effort. It does its
3667 * best to prepare for reset sequence but if things go wrong, it
3668 * should just whine, not fail.
3671 * Kernel thread context (may sleep)
3674 * 0 on success, -errno otherwise.
3676 int ata_std_prereset(struct ata_link *link, unsigned long deadline)
3678 struct ata_port *ap = link->ap;
3679 struct ata_eh_context *ehc = &link->eh_context;
3680 const unsigned long *timing = sata_ehc_deb_timing(ehc);
3683 /* if we're about to do hardreset, nothing more to do */
3684 if (ehc->i.action & ATA_EH_HARDRESET)
3687 /* if SATA, resume link */
3688 if (ap->flags & ATA_FLAG_SATA) {
3689 rc = sata_link_resume(link, timing, deadline);
3690 /* whine about phy resume failure but proceed */
3691 if (rc && rc != -EOPNOTSUPP)
3693 "failed to resume link for reset (errno=%d)\n",
3697 /* no point in trying softreset on offline link */
3698 if (ata_phys_link_offline(link))
3699 ehc->i.action &= ~ATA_EH_SOFTRESET;
3705 * sata_link_hardreset - reset link via SATA phy reset
3706 * @link: link to reset
3707 * @timing: timing parameters { interval, duratinon, timeout } in msec
3708 * @deadline: deadline jiffies for the operation
3709 * @online: optional out parameter indicating link onlineness
3710 * @check_ready: optional callback to check link readiness
3712 * SATA phy-reset @link using DET bits of SControl register.
3713 * After hardreset, link readiness is waited upon using
3714 * ata_wait_ready() if @check_ready is specified. LLDs are
3715 * allowed to not specify @check_ready and wait itself after this
3716 * function returns. Device classification is LLD's
3719 * *@online is set to one iff reset succeeded and @link is online
3723 * Kernel thread context (may sleep)
3726 * 0 on success, -errno otherwise.
3728 int sata_link_hardreset(struct ata_link *link, const unsigned long *timing,
3729 unsigned long deadline,
3730 bool *online, int (*check_ready)(struct ata_link *))
3740 if (sata_set_spd_needed(link)) {
3741 /* SATA spec says nothing about how to reconfigure
3742 * spd. To be on the safe side, turn off phy during
3743 * reconfiguration. This works for at least ICH7 AHCI
3746 if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
3749 scontrol = (scontrol & 0x0f0) | 0x304;
3751 if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol)))
3757 /* issue phy wake/reset */
3758 if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
3761 scontrol = (scontrol & 0x0f0) | 0x301;
3763 if ((rc = sata_scr_write_flush(link, SCR_CONTROL, scontrol)))
3766 /* Couldn't find anything in SATA I/II specs, but AHCI-1.1
3767 * 10.4.2 says at least 1 ms.
3769 ata_msleep(link->ap, 1);
3771 /* bring link back */
3772 rc = sata_link_resume(link, timing, deadline);
3775 /* if link is offline nothing more to do */
3776 if (ata_phys_link_offline(link))
3779 /* Link is online. From this point, -ENODEV too is an error. */
3783 if (sata_pmp_supported(link->ap) && ata_is_host_link(link)) {
3784 /* If PMP is supported, we have to do follow-up SRST.
3785 * Some PMPs don't send D2H Reg FIS after hardreset if
3786 * the first port is empty. Wait only for
3787 * ATA_TMOUT_PMP_SRST_WAIT.
3790 unsigned long pmp_deadline;
3792 pmp_deadline = ata_deadline(jiffies,
3793 ATA_TMOUT_PMP_SRST_WAIT);
3794 if (time_after(pmp_deadline, deadline))
3795 pmp_deadline = deadline;
3796 ata_wait_ready(link, pmp_deadline, check_ready);
3804 rc = ata_wait_ready(link, deadline, check_ready);
3806 if (rc && rc != -EAGAIN) {
3807 /* online is set iff link is online && reset succeeded */
3810 ata_link_err(link, "COMRESET failed (errno=%d)\n", rc);
3812 DPRINTK("EXIT, rc=%d\n", rc);
3817 * sata_std_hardreset - COMRESET w/o waiting or classification
3818 * @link: link to reset
3819 * @class: resulting class of attached device
3820 * @deadline: deadline jiffies for the operation
3822 * Standard SATA COMRESET w/o waiting or classification.
3825 * Kernel thread context (may sleep)
3828 * 0 if link offline, -EAGAIN if link online, -errno on errors.
3830 int sata_std_hardreset(struct ata_link *link, unsigned int *class,
3831 unsigned long deadline)
3833 const unsigned long *timing = sata_ehc_deb_timing(&link->eh_context);
3838 rc = sata_link_hardreset(link, timing, deadline, &online, NULL);
3839 return online ? -EAGAIN : rc;
3843 * ata_std_postreset - standard postreset callback
3844 * @link: the target ata_link
3845 * @classes: classes of attached devices
3847 * This function is invoked after a successful reset. Note that
3848 * the device might have been reset more than once using
3849 * different reset methods before postreset is invoked.
3852 * Kernel thread context (may sleep)
3854 void ata_std_postreset(struct ata_link *link, unsigned int *classes)
3860 /* reset complete, clear SError */
3861 if (!sata_scr_read(link, SCR_ERROR, &serror))
3862 sata_scr_write(link, SCR_ERROR, serror);
3864 /* print link status */
3865 sata_print_link_status(link);
3871 * ata_dev_same_device - Determine whether new ID matches configured device
3872 * @dev: device to compare against
3873 * @new_class: class of the new device
3874 * @new_id: IDENTIFY page of the new device
3876 * Compare @new_class and @new_id against @dev and determine
3877 * whether @dev is the device indicated by @new_class and
3884 * 1 if @dev matches @new_class and @new_id, 0 otherwise.
3886 static int ata_dev_same_device(struct ata_device *dev, unsigned int new_class,
3889 const u16 *old_id = dev->id;
3890 unsigned char model[2][ATA_ID_PROD_LEN + 1];
3891 unsigned char serial[2][ATA_ID_SERNO_LEN + 1];
3893 if (dev->class != new_class) {
3894 ata_dev_info(dev, "class mismatch %d != %d\n",
3895 dev->class, new_class);
3899 ata_id_c_string(old_id, model[0], ATA_ID_PROD, sizeof(model[0]));
3900 ata_id_c_string(new_id, model[1], ATA_ID_PROD, sizeof(model[1]));
3901 ata_id_c_string(old_id, serial[0], ATA_ID_SERNO, sizeof(serial[0]));
3902 ata_id_c_string(new_id, serial[1], ATA_ID_SERNO, sizeof(serial[1]));
3904 if (strcmp(model[0], model[1])) {
3905 ata_dev_info(dev, "model number mismatch '%s' != '%s'\n",
3906 model[0], model[1]);
3910 if (strcmp(serial[0], serial[1])) {
3911 ata_dev_info(dev, "serial number mismatch '%s' != '%s'\n",
3912 serial[0], serial[1]);
3920 * ata_dev_reread_id - Re-read IDENTIFY data
3921 * @dev: target ATA device
3922 * @readid_flags: read ID flags
3924 * Re-read IDENTIFY page and make sure @dev is still attached to
3928 * Kernel thread context (may sleep)
3931 * 0 on success, negative errno otherwise
3933 int ata_dev_reread_id(struct ata_device *dev, unsigned int readid_flags)
3935 unsigned int class = dev->class;
3936 u16 *id = (void *)dev->link->ap->sector_buf;
3940 rc = ata_dev_read_id(dev, &class, readid_flags, id);
3944 /* is the device still there? */
3945 if (!ata_dev_same_device(dev, class, id))
3948 memcpy(dev->id, id, sizeof(id[0]) * ATA_ID_WORDS);
3953 * ata_dev_revalidate - Revalidate ATA device
3954 * @dev: device to revalidate
3955 * @new_class: new class code
3956 * @readid_flags: read ID flags
3958 * Re-read IDENTIFY page, make sure @dev is still attached to the
3959 * port and reconfigure it according to the new IDENTIFY page.
3962 * Kernel thread context (may sleep)
3965 * 0 on success, negative errno otherwise
3967 int ata_dev_revalidate(struct ata_device *dev, unsigned int new_class,
3968 unsigned int readid_flags)
3970 u64 n_sectors = dev->n_sectors;
3971 u64 n_native_sectors = dev->n_native_sectors;
3974 if (!ata_dev_enabled(dev))
3977 /* fail early if !ATA && !ATAPI to avoid issuing [P]IDENTIFY to PMP */
3978 if (ata_class_enabled(new_class) &&
3979 new_class != ATA_DEV_ATA &&
3980 new_class != ATA_DEV_ATAPI &&
3981 new_class != ATA_DEV_SEMB) {
3982 ata_dev_info(dev, "class mismatch %u != %u\n",
3983 dev->class, new_class);
3989 rc = ata_dev_reread_id(dev, readid_flags);
3993 /* configure device according to the new ID */
3994 rc = ata_dev_configure(dev);
3998 /* verify n_sectors hasn't changed */
3999 if (dev->class != ATA_DEV_ATA || !n_sectors ||
4000 dev->n_sectors == n_sectors)
4003 /* n_sectors has changed */
4004 ata_dev_warn(dev, "n_sectors mismatch %llu != %llu\n",
4005 (unsigned long long)n_sectors,
4006 (unsigned long long)dev->n_sectors);
4009 * Something could have caused HPA to be unlocked
4010 * involuntarily. If n_native_sectors hasn't changed and the
4011 * new size matches it, keep the device.
4013 if (dev->n_native_sectors == n_native_sectors &&
4014 dev->n_sectors > n_sectors && dev->n_sectors == n_native_sectors) {
4016 "new n_sectors matches native, probably "
4017 "late HPA unlock, n_sectors updated\n");
4018 /* use the larger n_sectors */
4023 * Some BIOSes boot w/o HPA but resume w/ HPA locked. Try
4024 * unlocking HPA in those cases.
4026 * https://bugzilla.kernel.org/show_bug.cgi?id=15396
4028 if (dev->n_native_sectors == n_native_sectors &&
4029 dev->n_sectors < n_sectors && n_sectors == n_native_sectors &&
4030 !(dev->horkage & ATA_HORKAGE_BROKEN_HPA)) {
4032 "old n_sectors matches native, probably "
4033 "late HPA lock, will try to unlock HPA\n");
4034 /* try unlocking HPA */
4035 dev->flags |= ATA_DFLAG_UNLOCK_HPA;
4040 /* restore original n_[native_]sectors and fail */
4041 dev->n_native_sectors = n_native_sectors;
4042 dev->n_sectors = n_sectors;
4044 ata_dev_err(dev, "revalidation failed (errno=%d)\n", rc);
4048 struct ata_blacklist_entry {
4049 const char *model_num;
4050 const char *model_rev;
4051 unsigned long horkage;
4054 static const struct ata_blacklist_entry ata_device_blacklist [] = {
4055 /* Devices with DMA related problems under Linux */
4056 { "WDC AC11000H", NULL, ATA_HORKAGE_NODMA },
4057 { "WDC AC22100H", NULL, ATA_HORKAGE_NODMA },
4058 { "WDC AC32500H", NULL, ATA_HORKAGE_NODMA },
4059 { "WDC AC33100H", NULL, ATA_HORKAGE_NODMA },
4060 { "WDC AC31600H", NULL, ATA_HORKAGE_NODMA },
4061 { "WDC AC32100H", "24.09P07", ATA_HORKAGE_NODMA },
4062 { "WDC AC23200L", "21.10N21", ATA_HORKAGE_NODMA },
4063 { "Compaq CRD-8241B", NULL, ATA_HORKAGE_NODMA },
4064 { "CRD-8400B", NULL, ATA_HORKAGE_NODMA },
4065 { "CRD-848[02]B", NULL, ATA_HORKAGE_NODMA },
4066 { "CRD-84", NULL, ATA_HORKAGE_NODMA },
4067 { "SanDisk SDP3B", NULL, ATA_HORKAGE_NODMA },
4068 { "SanDisk SDP3B-64", NULL, ATA_HORKAGE_NODMA },
4069 { "SANYO CD-ROM CRD", NULL, ATA_HORKAGE_NODMA },
4070 { "HITACHI CDR-8", NULL, ATA_HORKAGE_NODMA },
4071 { "HITACHI CDR-8[34]35",NULL, ATA_HORKAGE_NODMA },
4072 { "Toshiba CD-ROM XM-6202B", NULL, ATA_HORKAGE_NODMA },
4073 { "TOSHIBA CD-ROM XM-1702BC", NULL, ATA_HORKAGE_NODMA },
4074 { "CD-532E-A", NULL, ATA_HORKAGE_NODMA },
4075 { "E-IDE CD-ROM CR-840",NULL, ATA_HORKAGE_NODMA },
4076 { "CD-ROM Drive/F5A", NULL, ATA_HORKAGE_NODMA },
4077 { "WPI CDD-820", NULL, ATA_HORKAGE_NODMA },
4078 { "SAMSUNG CD-ROM SC-148C", NULL, ATA_HORKAGE_NODMA },
4079 { "SAMSUNG CD-ROM SC", NULL, ATA_HORKAGE_NODMA },
4080 { "ATAPI CD-ROM DRIVE 40X MAXIMUM",NULL,ATA_HORKAGE_NODMA },
4081 { "_NEC DV5800A", NULL, ATA_HORKAGE_NODMA },
4082 { "SAMSUNG CD-ROM SN-124", "N001", ATA_HORKAGE_NODMA },
4083 { "Seagate STT20000A", NULL, ATA_HORKAGE_NODMA },
4084 { " 2GB ATA Flash Disk", "ADMA428M", ATA_HORKAGE_NODMA },
4085 /* Odd clown on sil3726/4726 PMPs */
4086 { "Config Disk", NULL, ATA_HORKAGE_DISABLE },
4088 /* Weird ATAPI devices */
4089 { "TORiSAN DVD-ROM DRD-N216", NULL, ATA_HORKAGE_MAX_SEC_128 },
4090 { "QUANTUM DAT DAT72-000", NULL, ATA_HORKAGE_ATAPI_MOD16_DMA },
4092 /* Devices we expect to fail diagnostics */
4094 /* Devices where NCQ should be avoided */
4096 { "WDC WD740ADFD-00", NULL, ATA_HORKAGE_NONCQ },
4097 { "WDC WD740ADFD-00NLR1", NULL, ATA_HORKAGE_NONCQ, },
4098 /* http://thread.gmane.org/gmane.linux.ide/14907 */
4099 { "FUJITSU MHT2060BH", NULL, ATA_HORKAGE_NONCQ },
4101 { "Maxtor *", "BANC*", ATA_HORKAGE_NONCQ },
4102 { "Maxtor 7V300F0", "VA111630", ATA_HORKAGE_NONCQ },
4103 { "ST380817AS", "3.42", ATA_HORKAGE_NONCQ },
4104 { "ST3160023AS", "3.42", ATA_HORKAGE_NONCQ },
4105 { "OCZ CORE_SSD", "02.10104", ATA_HORKAGE_NONCQ },
4107 /* Seagate NCQ + FLUSH CACHE firmware bug */
4108 { "ST31500341AS", "SD1[5-9]", ATA_HORKAGE_NONCQ |
4109 ATA_HORKAGE_FIRMWARE_WARN },
4111 { "ST31000333AS", "SD1[5-9]", ATA_HORKAGE_NONCQ |
4112 ATA_HORKAGE_FIRMWARE_WARN },
4114 { "ST3640[36]23AS", "SD1[5-9]", ATA_HORKAGE_NONCQ |
4115 ATA_HORKAGE_FIRMWARE_WARN },
4117 { "ST3320[68]13AS", "SD1[5-9]", ATA_HORKAGE_NONCQ |
4118 ATA_HORKAGE_FIRMWARE_WARN },
4120 /* Blacklist entries taken from Silicon Image 3124/3132
4121 Windows driver .inf file - also several Linux problem reports */
4122 { "HTS541060G9SA00", "MB3OC60D", ATA_HORKAGE_NONCQ, },
4123 { "HTS541080G9SA00", "MB4OC60D", ATA_HORKAGE_NONCQ, },
4124 { "HTS541010G9SA00", "MBZOC60D", ATA_HORKAGE_NONCQ, },
4126 /* https://bugzilla.kernel.org/show_bug.cgi?id=15573 */
4127 { "C300-CTFDDAC128MAG", "0001", ATA_HORKAGE_NONCQ, },
4129 /* devices which puke on READ_NATIVE_MAX */
4130 { "HDS724040KLSA80", "KFAOA20N", ATA_HORKAGE_BROKEN_HPA, },
4131 { "WDC WD3200JD-00KLB0", "WD-WCAMR1130137", ATA_HORKAGE_BROKEN_HPA },
4132 { "WDC WD2500JD-00HBB0", "WD-WMAL71490727", ATA_HORKAGE_BROKEN_HPA },
4133 { "MAXTOR 6L080L4", "A93.0500", ATA_HORKAGE_BROKEN_HPA },
4135 /* this one allows HPA unlocking but fails IOs on the area */
4136 { "OCZ-VERTEX", "1.30", ATA_HORKAGE_BROKEN_HPA },
4138 /* Devices which report 1 sector over size HPA */
4139 { "ST340823A", NULL, ATA_HORKAGE_HPA_SIZE, },
4140 { "ST320413A", NULL, ATA_HORKAGE_HPA_SIZE, },
4141 { "ST310211A", NULL, ATA_HORKAGE_HPA_SIZE, },
4143 /* Devices which get the IVB wrong */
4144 { "QUANTUM FIREBALLlct10 05", "A03.0900", ATA_HORKAGE_IVB, },
4145 /* Maybe we should just blacklist TSSTcorp... */
4146 { "TSSTcorp CDDVDW SH-S202[HJN]", "SB0[01]", ATA_HORKAGE_IVB, },
4148 /* Devices that do not need bridging limits applied */
4149 { "MTRON MSP-SATA*", NULL, ATA_HORKAGE_BRIDGE_OK, },
4150 { "BUFFALO HD-QSU2/R5", NULL, ATA_HORKAGE_BRIDGE_OK, },
4152 /* Devices which aren't very happy with higher link speeds */
4153 { "WD My Book", NULL, ATA_HORKAGE_1_5_GBPS, },
4154 { "Seagate FreeAgent GoFlex", NULL, ATA_HORKAGE_1_5_GBPS, },
4157 * Devices which choke on SETXFER. Applies only if both the
4158 * device and controller are SATA.
4160 { "PIONEER DVD-RW DVRTD08", NULL, ATA_HORKAGE_NOSETXFER },
4161 { "PIONEER DVD-RW DVRTD08A", NULL, ATA_HORKAGE_NOSETXFER },
4162 { "PIONEER DVD-RW DVR-215", NULL, ATA_HORKAGE_NOSETXFER },
4163 { "PIONEER DVD-RW DVR-212D", NULL, ATA_HORKAGE_NOSETXFER },
4164 { "PIONEER DVD-RW DVR-216D", NULL, ATA_HORKAGE_NOSETXFER },
4171 * glob_match - match a text string against a glob-style pattern
4172 * @text: the string to be examined
4173 * @pattern: the glob-style pattern to be matched against
4175 * Either/both of text and pattern can be empty strings.
4177 * Match text against a glob-style pattern, with wildcards and simple sets:
4179 * ? matches any single character.
4180 * * matches any run of characters.
4181 * [xyz] matches a single character from the set: x, y, or z.
4182 * [a-d] matches a single character from the range: a, b, c, or d.
4183 * [a-d0-9] matches a single character from either range.
4185 * The special characters ?, [, -, or *, can be matched using a set, eg. [*]
4186 * Behaviour with malformed patterns is undefined, though generally reasonable.
4188 * Sample patterns: "SD1?", "SD1[0-5]", "*R0", "SD*1?[012]*xx"
4190 * This function uses one level of recursion per '*' in pattern.
4191 * Since it calls _nothing_ else, and has _no_ explicit local variables,
4192 * this will not cause stack problems for any reasonable use here.
4195 * 0 on match, 1 otherwise.
4197 static int glob_match (const char *text, const char *pattern)
4200 /* Match single character or a '?' wildcard */
4201 if (*text == *pattern || *pattern == '?') {
4203 return 0; /* End of both strings: match */
4205 /* Match single char against a '[' bracketed ']' pattern set */
4206 if (!*text || *pattern != '[')
4207 break; /* Not a pattern set */
4208 while (*++pattern && *pattern != ']' && *text != *pattern) {
4209 if (*pattern == '-' && *(pattern - 1) != '[')
4210 if (*text > *(pattern - 1) && *text < *(pattern + 1)) {
4215 if (!*pattern || *pattern == ']')
4216 return 1; /* No match */
4217 while (*pattern && *pattern++ != ']');
4219 } while (*++text && *pattern);
4221 /* Match any run of chars against a '*' wildcard */
4222 if (*pattern == '*') {
4224 return 0; /* Match: avoid recursion at end of pattern */
4225 /* Loop to handle additional pattern chars after the wildcard */
4227 if (glob_match(text, pattern) == 0)
4228 return 0; /* Remainder matched */
4229 ++text; /* Absorb (match) this char and try again */
4232 if (!*text && !*pattern)
4233 return 0; /* End of both strings: match */
4234 return 1; /* No match */
4237 static unsigned long ata_dev_blacklisted(const struct ata_device *dev)
4239 unsigned char model_num[ATA_ID_PROD_LEN + 1];
4240 unsigned char model_rev[ATA_ID_FW_REV_LEN + 1];
4241 const struct ata_blacklist_entry *ad = ata_device_blacklist;
4243 ata_id_c_string(dev->id, model_num, ATA_ID_PROD, sizeof(model_num));
4244 ata_id_c_string(dev->id, model_rev, ATA_ID_FW_REV, sizeof(model_rev));
4246 while (ad->model_num) {
4247 if (!glob_match(model_num, ad->model_num)) {
4248 if (ad->model_rev == NULL)
4250 if (!glob_match(model_rev, ad->model_rev))
4258 static int ata_dma_blacklisted(const struct ata_device *dev)
4260 /* We don't support polling DMA.
4261 * DMA blacklist those ATAPI devices with CDB-intr (and use PIO)
4262 * if the LLDD handles only interrupts in the HSM_ST_LAST state.
4264 if ((dev->link->ap->flags & ATA_FLAG_PIO_POLLING) &&
4265 (dev->flags & ATA_DFLAG_CDB_INTR))
4267 return (dev->horkage & ATA_HORKAGE_NODMA) ? 1 : 0;
4271 * ata_is_40wire - check drive side detection
4274 * Perform drive side detection decoding, allowing for device vendors
4275 * who can't follow the documentation.
4278 static int ata_is_40wire(struct ata_device *dev)
4280 if (dev->horkage & ATA_HORKAGE_IVB)
4281 return ata_drive_40wire_relaxed(dev->id);
4282 return ata_drive_40wire(dev->id);
4286 * cable_is_40wire - 40/80/SATA decider
4287 * @ap: port to consider
4289 * This function encapsulates the policy for speed management
4290 * in one place. At the moment we don't cache the result but
4291 * there is a good case for setting ap->cbl to the result when
4292 * we are called with unknown cables (and figuring out if it
4293 * impacts hotplug at all).
4295 * Return 1 if the cable appears to be 40 wire.
4298 static int cable_is_40wire(struct ata_port *ap)
4300 struct ata_link *link;
4301 struct ata_device *dev;
4303 /* If the controller thinks we are 40 wire, we are. */
4304 if (ap->cbl == ATA_CBL_PATA40)
4307 /* If the controller thinks we are 80 wire, we are. */
4308 if (ap->cbl == ATA_CBL_PATA80 || ap->cbl == ATA_CBL_SATA)
4311 /* If the system is known to be 40 wire short cable (eg
4312 * laptop), then we allow 80 wire modes even if the drive
4315 if (ap->cbl == ATA_CBL_PATA40_SHORT)
4318 /* If the controller doesn't know, we scan.
4320 * Note: We look for all 40 wire detects at this point. Any
4321 * 80 wire detect is taken to be 80 wire cable because
4322 * - in many setups only the one drive (slave if present) will
4323 * give a valid detect
4324 * - if you have a non detect capable drive you don't want it
4325 * to colour the choice
4327 ata_for_each_link(link, ap, EDGE) {
4328 ata_for_each_dev(dev, link, ENABLED) {
4329 if (!ata_is_40wire(dev))
4337 * ata_dev_xfermask - Compute supported xfermask of the given device
4338 * @dev: Device to compute xfermask for
4340 * Compute supported xfermask of @dev and store it in
4341 * dev->*_mask. This function is responsible for applying all
4342 * known limits including host controller limits, device
4348 static void ata_dev_xfermask(struct ata_device *dev)
4350 struct ata_link *link = dev->link;
4351 struct ata_port *ap = link->ap;
4352 struct ata_host *host = ap->host;
4353 unsigned long xfer_mask;
4355 /* controller modes available */
4356 xfer_mask = ata_pack_xfermask(ap->pio_mask,
4357 ap->mwdma_mask, ap->udma_mask);
4359 /* drive modes available */
4360 xfer_mask &= ata_pack_xfermask(dev->pio_mask,
4361 dev->mwdma_mask, dev->udma_mask);
4362 xfer_mask &= ata_id_xfermask(dev->id);
4365 * CFA Advanced TrueIDE timings are not allowed on a shared
4368 if (ata_dev_pair(dev)) {
4369 /* No PIO5 or PIO6 */
4370 xfer_mask &= ~(0x03 << (ATA_SHIFT_PIO + 5));
4371 /* No MWDMA3 or MWDMA 4 */
4372 xfer_mask &= ~(0x03 << (ATA_SHIFT_MWDMA + 3));
4375 if (ata_dma_blacklisted(dev)) {
4376 xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA);
4378 "device is on DMA blacklist, disabling DMA\n");
4381 if ((host->flags & ATA_HOST_SIMPLEX) &&
4382 host->simplex_claimed && host->simplex_claimed != ap) {
4383 xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA);
4385 "simplex DMA is claimed by other device, disabling DMA\n");
4388 if (ap->flags & ATA_FLAG_NO_IORDY)
4389 xfer_mask &= ata_pio_mask_no_iordy(dev);
4391 if (ap->ops->mode_filter)
4392 xfer_mask = ap->ops->mode_filter(dev, xfer_mask);
4394 /* Apply cable rule here. Don't apply it early because when
4395 * we handle hot plug the cable type can itself change.
4396 * Check this last so that we know if the transfer rate was
4397 * solely limited by the cable.
4398 * Unknown or 80 wire cables reported host side are checked
4399 * drive side as well. Cases where we know a 40wire cable
4400 * is used safely for 80 are not checked here.
4402 if (xfer_mask & (0xF8 << ATA_SHIFT_UDMA))
4403 /* UDMA/44 or higher would be available */
4404 if (cable_is_40wire(ap)) {
4406 "limited to UDMA/33 due to 40-wire cable\n");
4407 xfer_mask &= ~(0xF8 << ATA_SHIFT_UDMA);
4410 ata_unpack_xfermask(xfer_mask, &dev->pio_mask,
4411 &dev->mwdma_mask, &dev->udma_mask);
4415 * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command
4416 * @dev: Device to which command will be sent
4418 * Issue SET FEATURES - XFER MODE command to device @dev
4422 * PCI/etc. bus probe sem.
4425 * 0 on success, AC_ERR_* mask otherwise.
4428 static unsigned int ata_dev_set_xfermode(struct ata_device *dev)
4430 struct ata_taskfile tf;
4431 unsigned int err_mask;
4433 /* set up set-features taskfile */
4434 DPRINTK("set features - xfer mode\n");
4436 /* Some controllers and ATAPI devices show flaky interrupt
4437 * behavior after setting xfer mode. Use polling instead.
4439 ata_tf_init(dev, &tf);
4440 tf.command = ATA_CMD_SET_FEATURES;
4441 tf.feature = SETFEATURES_XFER;
4442 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_POLLING;
4443 tf.protocol = ATA_PROT_NODATA;
4444 /* If we are using IORDY we must send the mode setting command */
4445 if (ata_pio_need_iordy(dev))
4446 tf.nsect = dev->xfer_mode;
4447 /* If the device has IORDY and the controller does not - turn it off */
4448 else if (ata_id_has_iordy(dev->id))
4450 else /* In the ancient relic department - skip all of this */
4453 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
4455 DPRINTK("EXIT, err_mask=%x\n", err_mask);
4460 * ata_dev_set_feature - Issue SET FEATURES - SATA FEATURES
4461 * @dev: Device to which command will be sent
4462 * @enable: Whether to enable or disable the feature
4463 * @feature: The sector count represents the feature to set
4465 * Issue SET FEATURES - SATA FEATURES command to device @dev
4466 * on port @ap with sector count
4469 * PCI/etc. bus probe sem.
4472 * 0 on success, AC_ERR_* mask otherwise.
4474 unsigned int ata_dev_set_feature(struct ata_device *dev, u8 enable, u8 feature)
4476 struct ata_taskfile tf;
4477 unsigned int err_mask;
4479 /* set up set-features taskfile */
4480 DPRINTK("set features - SATA features\n");
4482 ata_tf_init(dev, &tf);
4483 tf.command = ATA_CMD_SET_FEATURES;
4484 tf.feature = enable;
4485 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
4486 tf.protocol = ATA_PROT_NODATA;
4489 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
4491 DPRINTK("EXIT, err_mask=%x\n", err_mask);
4494 EXPORT_SYMBOL_GPL(ata_dev_set_feature);
4497 * ata_dev_init_params - Issue INIT DEV PARAMS command
4498 * @dev: Device to which command will be sent
4499 * @heads: Number of heads (taskfile parameter)
4500 * @sectors: Number of sectors (taskfile parameter)
4503 * Kernel thread context (may sleep)
4506 * 0 on success, AC_ERR_* mask otherwise.
4508 static unsigned int ata_dev_init_params(struct ata_device *dev,
4509 u16 heads, u16 sectors)
4511 struct ata_taskfile tf;
4512 unsigned int err_mask;
4514 /* Number of sectors per track 1-255. Number of heads 1-16 */
4515 if (sectors < 1 || sectors > 255 || heads < 1 || heads > 16)
4516 return AC_ERR_INVALID;
4518 /* set up init dev params taskfile */
4519 DPRINTK("init dev params \n");
4521 ata_tf_init(dev, &tf);
4522 tf.command = ATA_CMD_INIT_DEV_PARAMS;
4523 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
4524 tf.protocol = ATA_PROT_NODATA;
4526 tf.device |= (heads - 1) & 0x0f; /* max head = num. of heads - 1 */
4528 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
4529 /* A clean abort indicates an original or just out of spec drive
4530 and we should continue as we issue the setup based on the
4531 drive reported working geometry */
4532 if (err_mask == AC_ERR_DEV && (tf.feature & ATA_ABORTED))
4535 DPRINTK("EXIT, err_mask=%x\n", err_mask);
4540 * ata_sg_clean - Unmap DMA memory associated with command
4541 * @qc: Command containing DMA memory to be released
4543 * Unmap all mapped DMA memory associated with this command.
4546 * spin_lock_irqsave(host lock)
4548 void ata_sg_clean(struct ata_queued_cmd *qc)
4550 struct ata_port *ap = qc->ap;
4551 struct scatterlist *sg = qc->sg;
4552 int dir = qc->dma_dir;
4554 WARN_ON_ONCE(sg == NULL);
4556 VPRINTK("unmapping %u sg elements\n", qc->n_elem);
4559 dma_unmap_sg(ap->dev, sg, qc->orig_n_elem, dir);
4561 qc->flags &= ~ATA_QCFLAG_DMAMAP;
4566 * atapi_check_dma - Check whether ATAPI DMA can be supported
4567 * @qc: Metadata associated with taskfile to check
4569 * Allow low-level driver to filter ATA PACKET commands, returning
4570 * a status indicating whether or not it is OK to use DMA for the
4571 * supplied PACKET command.
4574 * spin_lock_irqsave(host lock)
4576 * RETURNS: 0 when ATAPI DMA can be used
4579 int atapi_check_dma(struct ata_queued_cmd *qc)
4581 struct ata_port *ap = qc->ap;
4583 /* Don't allow DMA if it isn't multiple of 16 bytes. Quite a
4584 * few ATAPI devices choke on such DMA requests.
4586 if (!(qc->dev->horkage & ATA_HORKAGE_ATAPI_MOD16_DMA) &&
4587 unlikely(qc->nbytes & 15))
4590 if (ap->ops->check_atapi_dma)
4591 return ap->ops->check_atapi_dma(qc);
4597 * ata_std_qc_defer - Check whether a qc needs to be deferred
4598 * @qc: ATA command in question
4600 * Non-NCQ commands cannot run with any other command, NCQ or
4601 * not. As upper layer only knows the queue depth, we are
4602 * responsible for maintaining exclusion. This function checks
4603 * whether a new command @qc can be issued.
4606 * spin_lock_irqsave(host lock)
4609 * ATA_DEFER_* if deferring is needed, 0 otherwise.
4611 int ata_std_qc_defer(struct ata_queued_cmd *qc)
4613 struct ata_link *link = qc->dev->link;
4615 if (qc->tf.protocol == ATA_PROT_NCQ) {
4616 if (!ata_tag_valid(link->active_tag))
4619 if (!ata_tag_valid(link->active_tag) && !link->sactive)
4623 return ATA_DEFER_LINK;
4626 void ata_noop_qc_prep(struct ata_queued_cmd *qc) { }
4629 * ata_sg_init - Associate command with scatter-gather table.
4630 * @qc: Command to be associated
4631 * @sg: Scatter-gather table.
4632 * @n_elem: Number of elements in s/g table.
4634 * Initialize the data-related elements of queued_cmd @qc
4635 * to point to a scatter-gather table @sg, containing @n_elem
4639 * spin_lock_irqsave(host lock)
4641 void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
4642 unsigned int n_elem)
4645 qc->n_elem = n_elem;
4650 * ata_sg_setup - DMA-map the scatter-gather table associated with a command.
4651 * @qc: Command with scatter-gather table to be mapped.
4653 * DMA-map the scatter-gather table associated with queued_cmd @qc.
4656 * spin_lock_irqsave(host lock)
4659 * Zero on success, negative on error.
4662 static int ata_sg_setup(struct ata_queued_cmd *qc)
4664 struct ata_port *ap = qc->ap;
4665 unsigned int n_elem;
4667 VPRINTK("ENTER, ata%u\n", ap->print_id);
4669 n_elem = dma_map_sg(ap->dev, qc->sg, qc->n_elem, qc->dma_dir);
4673 DPRINTK("%d sg elements mapped\n", n_elem);
4674 qc->orig_n_elem = qc->n_elem;
4675 qc->n_elem = n_elem;
4676 qc->flags |= ATA_QCFLAG_DMAMAP;
4682 * swap_buf_le16 - swap halves of 16-bit words in place
4683 * @buf: Buffer to swap
4684 * @buf_words: Number of 16-bit words in buffer.
4686 * Swap halves of 16-bit words if needed to convert from
4687 * little-endian byte order to native cpu byte order, or
4691 * Inherited from caller.
4693 void swap_buf_le16(u16 *buf, unsigned int buf_words)
4698 for (i = 0; i < buf_words; i++)
4699 buf[i] = le16_to_cpu(buf[i]);
4700 #endif /* __BIG_ENDIAN */
4704 * ata_qc_new - Request an available ATA command, for queueing
4711 static struct ata_queued_cmd *ata_qc_new(struct ata_port *ap)
4713 struct ata_queued_cmd *qc = NULL;
4716 /* no command while frozen */
4717 if (unlikely(ap->pflags & ATA_PFLAG_FROZEN))
4720 /* the last tag is reserved for internal command. */
4721 for (i = 0; i < ATA_MAX_QUEUE - 1; i++)
4722 if (!test_and_set_bit(i, &ap->qc_allocated)) {
4723 qc = __ata_qc_from_tag(ap, i);
4734 * ata_qc_new_init - Request an available ATA command, and initialize it
4735 * @dev: Device from whom we request an available command structure
4741 struct ata_queued_cmd *ata_qc_new_init(struct ata_device *dev)
4743 struct ata_port *ap = dev->link->ap;
4744 struct ata_queued_cmd *qc;
4746 qc = ata_qc_new(ap);
4759 * ata_qc_free - free unused ata_queued_cmd
4760 * @qc: Command to complete
4762 * Designed to free unused ata_queued_cmd object
4763 * in case something prevents using it.
4766 * spin_lock_irqsave(host lock)
4768 void ata_qc_free(struct ata_queued_cmd *qc)
4770 struct ata_port *ap;
4773 WARN_ON_ONCE(qc == NULL); /* ata_qc_from_tag _might_ return NULL */
4778 if (likely(ata_tag_valid(tag))) {
4779 qc->tag = ATA_TAG_POISON;
4780 clear_bit(tag, &ap->qc_allocated);
4784 void __ata_qc_complete(struct ata_queued_cmd *qc)
4786 struct ata_port *ap;
4787 struct ata_link *link;
4789 WARN_ON_ONCE(qc == NULL); /* ata_qc_from_tag _might_ return NULL */
4790 WARN_ON_ONCE(!(qc->flags & ATA_QCFLAG_ACTIVE));
4792 link = qc->dev->link;
4794 if (likely(qc->flags & ATA_QCFLAG_DMAMAP))
4797 /* command should be marked inactive atomically with qc completion */
4798 if (qc->tf.protocol == ATA_PROT_NCQ) {
4799 link->sactive &= ~(1 << qc->tag);
4801 ap->nr_active_links--;
4803 link->active_tag = ATA_TAG_POISON;
4804 ap->nr_active_links--;
4807 /* clear exclusive status */
4808 if (unlikely(qc->flags & ATA_QCFLAG_CLEAR_EXCL &&
4809 ap->excl_link == link))
4810 ap->excl_link = NULL;
4812 /* atapi: mark qc as inactive to prevent the interrupt handler
4813 * from completing the command twice later, before the error handler
4814 * is called. (when rc != 0 and atapi request sense is needed)
4816 qc->flags &= ~ATA_QCFLAG_ACTIVE;
4817 ap->qc_active &= ~(1 << qc->tag);
4819 /* call completion callback */
4820 qc->complete_fn(qc);
4823 static void fill_result_tf(struct ata_queued_cmd *qc)
4825 struct ata_port *ap = qc->ap;
4827 qc->result_tf.flags = qc->tf.flags;
4828 ap->ops->qc_fill_rtf(qc);
4831 static void ata_verify_xfer(struct ata_queued_cmd *qc)
4833 struct ata_device *dev = qc->dev;
4835 if (ata_is_nodata(qc->tf.protocol))
4838 if ((dev->mwdma_mask || dev->udma_mask) && ata_is_pio(qc->tf.protocol))
4841 dev->flags &= ~ATA_DFLAG_DUBIOUS_XFER;
4845 * ata_qc_complete - Complete an active ATA command
4846 * @qc: Command to complete
4848 * Indicate to the mid and upper layers that an ATA command has
4849 * completed, with either an ok or not-ok status.
4851 * Refrain from calling this function multiple times when
4852 * successfully completing multiple NCQ commands.
4853 * ata_qc_complete_multiple() should be used instead, which will
4854 * properly update IRQ expect state.
4857 * spin_lock_irqsave(host lock)
4859 void ata_qc_complete(struct ata_queued_cmd *qc)
4861 struct ata_port *ap = qc->ap;
4863 /* XXX: New EH and old EH use different mechanisms to
4864 * synchronize EH with regular execution path.
4866 * In new EH, a failed qc is marked with ATA_QCFLAG_FAILED.
4867 * Normal execution path is responsible for not accessing a
4868 * failed qc. libata core enforces the rule by returning NULL
4869 * from ata_qc_from_tag() for failed qcs.
4871 * Old EH depends on ata_qc_complete() nullifying completion
4872 * requests if ATA_QCFLAG_EH_SCHEDULED is set. Old EH does
4873 * not synchronize with interrupt handler. Only PIO task is
4876 if (ap->ops->error_handler) {
4877 struct ata_device *dev = qc->dev;
4878 struct ata_eh_info *ehi = &dev->link->eh_info;
4880 if (unlikely(qc->err_mask))
4881 qc->flags |= ATA_QCFLAG_FAILED;
4884 * Finish internal commands without any further processing
4885 * and always with the result TF filled.
4887 if (unlikely(ata_tag_internal(qc->tag))) {
4889 __ata_qc_complete(qc);
4894 * Non-internal qc has failed. Fill the result TF and
4897 if (unlikely(qc->flags & ATA_QCFLAG_FAILED)) {
4899 ata_qc_schedule_eh(qc);
4903 WARN_ON_ONCE(ap->pflags & ATA_PFLAG_FROZEN);
4905 /* read result TF if requested */
4906 if (qc->flags & ATA_QCFLAG_RESULT_TF)
4909 /* Some commands need post-processing after successful
4912 switch (qc->tf.command) {
4913 case ATA_CMD_SET_FEATURES:
4914 if (qc->tf.feature != SETFEATURES_WC_ON &&
4915 qc->tf.feature != SETFEATURES_WC_OFF)
4918 case ATA_CMD_INIT_DEV_PARAMS: /* CHS translation changed */
4919 case ATA_CMD_SET_MULTI: /* multi_count changed */
4920 /* revalidate device */
4921 ehi->dev_action[dev->devno] |= ATA_EH_REVALIDATE;
4922 ata_port_schedule_eh(ap);
4926 dev->flags |= ATA_DFLAG_SLEEPING;
4930 if (unlikely(dev->flags & ATA_DFLAG_DUBIOUS_XFER))
4931 ata_verify_xfer(qc);
4933 __ata_qc_complete(qc);
4935 if (qc->flags & ATA_QCFLAG_EH_SCHEDULED)
4938 /* read result TF if failed or requested */
4939 if (qc->err_mask || qc->flags & ATA_QCFLAG_RESULT_TF)
4942 __ata_qc_complete(qc);
4947 * ata_qc_complete_multiple - Complete multiple qcs successfully
4948 * @ap: port in question
4949 * @qc_active: new qc_active mask
4951 * Complete in-flight commands. This functions is meant to be
4952 * called from low-level driver's interrupt routine to complete
4953 * requests normally. ap->qc_active and @qc_active is compared
4954 * and commands are completed accordingly.
4956 * Always use this function when completing multiple NCQ commands
4957 * from IRQ handlers instead of calling ata_qc_complete()
4958 * multiple times to keep IRQ expect status properly in sync.
4961 * spin_lock_irqsave(host lock)
4964 * Number of completed commands on success, -errno otherwise.
4966 int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active)
4971 done_mask = ap->qc_active ^ qc_active;
4973 if (unlikely(done_mask & qc_active)) {
4974 ata_port_err(ap, "illegal qc_active transition (%08x->%08x)\n",
4975 ap->qc_active, qc_active);
4980 struct ata_queued_cmd *qc;
4981 unsigned int tag = __ffs(done_mask);
4983 qc = ata_qc_from_tag(ap, tag);
4985 ata_qc_complete(qc);
4988 done_mask &= ~(1 << tag);
4995 * ata_qc_issue - issue taskfile to device
4996 * @qc: command to issue to device
4998 * Prepare an ATA command to submission to device.
4999 * This includes mapping the data into a DMA-able
5000 * area, filling in the S/G table, and finally
5001 * writing the taskfile to hardware, starting the command.
5004 * spin_lock_irqsave(host lock)
5006 void ata_qc_issue(struct ata_queued_cmd *qc)
5008 struct ata_port *ap = qc->ap;
5009 struct ata_link *link = qc->dev->link;
5010 u8 prot = qc->tf.protocol;
5012 /* Make sure only one non-NCQ command is outstanding. The
5013 * check is skipped for old EH because it reuses active qc to
5014 * request ATAPI sense.
5016 WARN_ON_ONCE(ap->ops->error_handler && ata_tag_valid(link->active_tag));
5018 if (ata_is_ncq(prot)) {
5019 WARN_ON_ONCE(link->sactive & (1 << qc->tag));
5022 ap->nr_active_links++;
5023 link->sactive |= 1 << qc->tag;
5025 WARN_ON_ONCE(link->sactive);
5027 ap->nr_active_links++;
5028 link->active_tag = qc->tag;
5031 qc->flags |= ATA_QCFLAG_ACTIVE;
5032 ap->qc_active |= 1 << qc->tag;
5035 * We guarantee to LLDs that they will have at least one
5036 * non-zero sg if the command is a data command.
5038 if (WARN_ON_ONCE(ata_is_data(prot) &&
5039 (!qc->sg || !qc->n_elem || !qc->nbytes)))
5042 if (ata_is_dma(prot) || (ata_is_pio(prot) &&
5043 (ap->flags & ATA_FLAG_PIO_DMA)))
5044 if (ata_sg_setup(qc))
5047 /* if device is sleeping, schedule reset and abort the link */
5048 if (unlikely(qc->dev->flags & ATA_DFLAG_SLEEPING)) {
5049 link->eh_info.action |= ATA_EH_RESET;
5050 ata_ehi_push_desc(&link->eh_info, "waking up from sleep");
5051 ata_link_abort(link);
5055 ap->ops->qc_prep(qc);
5057 qc->err_mask |= ap->ops->qc_issue(qc);
5058 if (unlikely(qc->err_mask))
5063 qc->err_mask |= AC_ERR_SYSTEM;
5065 ata_qc_complete(qc);
5069 * sata_scr_valid - test whether SCRs are accessible
5070 * @link: ATA link to test SCR accessibility for
5072 * Test whether SCRs are accessible for @link.
5078 * 1 if SCRs are accessible, 0 otherwise.
5080 int sata_scr_valid(struct ata_link *link)
5082 struct ata_port *ap = link->ap;
5084 return (ap->flags & ATA_FLAG_SATA) && ap->ops->scr_read;
5088 * sata_scr_read - read SCR register of the specified port
5089 * @link: ATA link to read SCR for
5091 * @val: Place to store read value
5093 * Read SCR register @reg of @link into *@val. This function is
5094 * guaranteed to succeed if @link is ap->link, the cable type of
5095 * the port is SATA and the port implements ->scr_read.
5098 * None if @link is ap->link. Kernel thread context otherwise.
5101 * 0 on success, negative errno on failure.
5103 int sata_scr_read(struct ata_link *link, int reg, u32 *val)
5105 if (ata_is_host_link(link)) {
5106 if (sata_scr_valid(link))
5107 return link->ap->ops->scr_read(link, reg, val);
5111 return sata_pmp_scr_read(link, reg, val);
5115 * sata_scr_write - write SCR register of the specified port
5116 * @link: ATA link to write SCR for
5117 * @reg: SCR to write
5118 * @val: value to write
5120 * Write @val to SCR register @reg of @link. This function is
5121 * guaranteed to succeed if @link is ap->link, the cable type of
5122 * the port is SATA and the port implements ->scr_read.
5125 * None if @link is ap->link. Kernel thread context otherwise.
5128 * 0 on success, negative errno on failure.
5130 int sata_scr_write(struct ata_link *link, int reg, u32 val)
5132 if (ata_is_host_link(link)) {
5133 if (sata_scr_valid(link))
5134 return link->ap->ops->scr_write(link, reg, val);
5138 return sata_pmp_scr_write(link, reg, val);
5142 * sata_scr_write_flush - write SCR register of the specified port and flush
5143 * @link: ATA link to write SCR for
5144 * @reg: SCR to write
5145 * @val: value to write
5147 * This function is identical to sata_scr_write() except that this
5148 * function performs flush after writing to the register.
5151 * None if @link is ap->link. Kernel thread context otherwise.
5154 * 0 on success, negative errno on failure.
5156 int sata_scr_write_flush(struct ata_link *link, int reg, u32 val)
5158 if (ata_is_host_link(link)) {
5161 if (sata_scr_valid(link)) {
5162 rc = link->ap->ops->scr_write(link, reg, val);
5164 rc = link->ap->ops->scr_read(link, reg, &val);
5170 return sata_pmp_scr_write(link, reg, val);
5174 * ata_phys_link_online - test whether the given link is online
5175 * @link: ATA link to test
5177 * Test whether @link is online. Note that this function returns
5178 * 0 if online status of @link cannot be obtained, so
5179 * ata_link_online(link) != !ata_link_offline(link).
5185 * True if the port online status is available and online.
5187 bool ata_phys_link_online(struct ata_link *link)
5191 if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0 &&
5192 ata_sstatus_online(sstatus))
5198 * ata_phys_link_offline - test whether the given link is offline
5199 * @link: ATA link to test
5201 * Test whether @link is offline. Note that this function
5202 * returns 0 if offline status of @link cannot be obtained, so
5203 * ata_link_online(link) != !ata_link_offline(link).
5209 * True if the port offline status is available and offline.
5211 bool ata_phys_link_offline(struct ata_link *link)
5215 if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0 &&
5216 !ata_sstatus_online(sstatus))
5222 * ata_link_online - test whether the given link is online
5223 * @link: ATA link to test
5225 * Test whether @link is online. This is identical to
5226 * ata_phys_link_online() when there's no slave link. When
5227 * there's a slave link, this function should only be called on
5228 * the master link and will return true if any of M/S links is
5235 * True if the port online status is available and online.
5237 bool ata_link_online(struct ata_link *link)
5239 struct ata_link *slave = link->ap->slave_link;
5241 WARN_ON(link == slave); /* shouldn't be called on slave link */
5243 return ata_phys_link_online(link) ||
5244 (slave && ata_phys_link_online(slave));
5248 * ata_link_offline - test whether the given link is offline
5249 * @link: ATA link to test
5251 * Test whether @link is offline. This is identical to
5252 * ata_phys_link_offline() when there's no slave link. When
5253 * there's a slave link, this function should only be called on
5254 * the master link and will return true if both M/S links are
5261 * True if the port offline status is available and offline.
5263 bool ata_link_offline(struct ata_link *link)
5265 struct ata_link *slave = link->ap->slave_link;
5267 WARN_ON(link == slave); /* shouldn't be called on slave link */
5269 return ata_phys_link_offline(link) &&
5270 (!slave || ata_phys_link_offline(slave));
5274 static int ata_port_request_pm(struct ata_port *ap, pm_message_t mesg,
5275 unsigned int action, unsigned int ehi_flags,
5278 struct ata_link *link;
5279 unsigned long flags;
5282 /* Previous resume operation might still be in
5283 * progress. Wait for PM_PENDING to clear.
5285 if (ap->pflags & ATA_PFLAG_PM_PENDING) {
5290 ata_port_wait_eh(ap);
5291 WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING);
5294 /* request PM ops to EH */
5295 spin_lock_irqsave(ap->lock, flags);
5299 ap->pm_result = async;
5301 ap->pm_result = &rc;
5303 ap->pflags |= ATA_PFLAG_PM_PENDING;
5304 ata_for_each_link(link, ap, HOST_FIRST) {
5305 link->eh_info.action |= action;
5306 link->eh_info.flags |= ehi_flags;
5309 ata_port_schedule_eh(ap);
5311 spin_unlock_irqrestore(ap->lock, flags);
5313 /* wait and check result */
5315 ata_port_wait_eh(ap);
5316 WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING);
5322 static int __ata_port_suspend_common(struct ata_port *ap, pm_message_t mesg, int *async)
5324 unsigned int ehi_flags = ATA_EHI_QUIET;
5328 * On some hardware, device fails to respond after spun down
5329 * for suspend. As the device won't be used before being
5330 * resumed, we don't need to touch the device. Ask EH to skip
5331 * the usual stuff and proceed directly to suspend.
5333 * http://thread.gmane.org/gmane.linux.ide/46764
5335 if (mesg.event == PM_EVENT_SUSPEND)
5336 ehi_flags |= ATA_EHI_NO_AUTOPSY | ATA_EHI_NO_RECOVERY;
5338 rc = ata_port_request_pm(ap, mesg, 0, ehi_flags, async);
5342 static int ata_port_suspend_common(struct device *dev, pm_message_t mesg)
5344 struct ata_port *ap = to_ata_port(dev);
5346 return __ata_port_suspend_common(ap, mesg, NULL);
5349 static int ata_port_suspend(struct device *dev)
5351 if (pm_runtime_suspended(dev))
5354 return ata_port_suspend_common(dev, PMSG_SUSPEND);
5357 static int ata_port_do_freeze(struct device *dev)
5359 if (pm_runtime_suspended(dev))
5360 pm_runtime_resume(dev);
5362 return ata_port_suspend_common(dev, PMSG_FREEZE);
5365 static int ata_port_poweroff(struct device *dev)
5367 if (pm_runtime_suspended(dev))
5370 return ata_port_suspend_common(dev, PMSG_HIBERNATE);
5373 static int __ata_port_resume_common(struct ata_port *ap, int *async)
5377 rc = ata_port_request_pm(ap, PMSG_ON, ATA_EH_RESET,
5378 ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET, async);
5382 static int ata_port_resume_common(struct device *dev)
5384 struct ata_port *ap = to_ata_port(dev);
5386 return __ata_port_resume_common(ap, NULL);
5389 static int ata_port_resume(struct device *dev)
5393 rc = ata_port_resume_common(dev);
5395 pm_runtime_disable(dev);
5396 pm_runtime_set_active(dev);
5397 pm_runtime_enable(dev);
5403 static int ata_port_runtime_idle(struct device *dev)
5405 return pm_runtime_suspend(dev);
5408 static const struct dev_pm_ops ata_port_pm_ops = {
5409 .suspend = ata_port_suspend,
5410 .resume = ata_port_resume,
5411 .freeze = ata_port_do_freeze,
5412 .thaw = ata_port_resume,
5413 .poweroff = ata_port_poweroff,
5414 .restore = ata_port_resume,
5416 .runtime_suspend = ata_port_suspend,
5417 .runtime_resume = ata_port_resume_common,
5418 .runtime_idle = ata_port_runtime_idle,
5421 /* sas ports don't participate in pm runtime management of ata_ports,
5422 * and need to resume ata devices at the domain level, not the per-port
5423 * level. sas suspend/resume is async to allow parallel port recovery
5424 * since sas has multiple ata_port instances per Scsi_Host.
5426 int ata_sas_port_async_suspend(struct ata_port *ap, int *async)
5428 return __ata_port_suspend_common(ap, PMSG_SUSPEND, async);
5430 EXPORT_SYMBOL_GPL(ata_sas_port_async_suspend);
5432 int ata_sas_port_async_resume(struct ata_port *ap, int *async)
5434 return __ata_port_resume_common(ap, async);
5436 EXPORT_SYMBOL_GPL(ata_sas_port_async_resume);
5440 * ata_host_suspend - suspend host
5441 * @host: host to suspend
5444 * Suspend @host. Actual operation is performed by port suspend.
5446 int ata_host_suspend(struct ata_host *host, pm_message_t mesg)
5448 host->dev->power.power_state = mesg;
5453 * ata_host_resume - resume host
5454 * @host: host to resume
5456 * Resume @host. Actual operation is performed by port resume.
5458 void ata_host_resume(struct ata_host *host)
5460 host->dev->power.power_state = PMSG_ON;
5464 struct device_type ata_port_type = {
5467 .pm = &ata_port_pm_ops,
5472 * ata_dev_init - Initialize an ata_device structure
5473 * @dev: Device structure to initialize
5475 * Initialize @dev in preparation for probing.
5478 * Inherited from caller.
5480 void ata_dev_init(struct ata_device *dev)
5482 struct ata_link *link = ata_dev_phys_link(dev);
5483 struct ata_port *ap = link->ap;
5484 unsigned long flags;
5486 /* SATA spd limit is bound to the attached device, reset together */
5487 link->sata_spd_limit = link->hw_sata_spd_limit;
5490 /* High bits of dev->flags are used to record warm plug
5491 * requests which occur asynchronously. Synchronize using
5494 spin_lock_irqsave(ap->lock, flags);
5495 dev->flags &= ~ATA_DFLAG_INIT_MASK;
5497 spin_unlock_irqrestore(ap->lock, flags);
5499 memset((void *)dev + ATA_DEVICE_CLEAR_BEGIN, 0,
5500 ATA_DEVICE_CLEAR_END - ATA_DEVICE_CLEAR_BEGIN);
5501 dev->pio_mask = UINT_MAX;
5502 dev->mwdma_mask = UINT_MAX;
5503 dev->udma_mask = UINT_MAX;
5507 * ata_link_init - Initialize an ata_link structure
5508 * @ap: ATA port link is attached to
5509 * @link: Link structure to initialize
5510 * @pmp: Port multiplier port number
5515 * Kernel thread context (may sleep)
5517 void ata_link_init(struct ata_port *ap, struct ata_link *link, int pmp)
5521 /* clear everything except for devices */
5522 memset((void *)link + ATA_LINK_CLEAR_BEGIN, 0,
5523 ATA_LINK_CLEAR_END - ATA_LINK_CLEAR_BEGIN);
5527 link->active_tag = ATA_TAG_POISON;
5528 link->hw_sata_spd_limit = UINT_MAX;
5530 /* can't use iterator, ap isn't initialized yet */
5531 for (i = 0; i < ATA_MAX_DEVICES; i++) {
5532 struct ata_device *dev = &link->device[i];
5535 dev->devno = dev - link->device;
5536 #ifdef CONFIG_ATA_ACPI
5537 dev->gtf_filter = ata_acpi_gtf_filter;
5544 * sata_link_init_spd - Initialize link->sata_spd_limit
5545 * @link: Link to configure sata_spd_limit for
5547 * Initialize @link->[hw_]sata_spd_limit to the currently
5551 * Kernel thread context (may sleep).
5554 * 0 on success, -errno on failure.
5556 int sata_link_init_spd(struct ata_link *link)
5561 rc = sata_scr_read(link, SCR_CONTROL, &link->saved_scontrol);
5565 spd = (link->saved_scontrol >> 4) & 0xf;
5567 link->hw_sata_spd_limit &= (1 << spd) - 1;
5569 ata_force_link_limits(link);
5571 link->sata_spd_limit = link->hw_sata_spd_limit;
5577 * ata_port_alloc - allocate and initialize basic ATA port resources
5578 * @host: ATA host this allocated port belongs to
5580 * Allocate and initialize basic ATA port resources.
5583 * Allocate ATA port on success, NULL on failure.
5586 * Inherited from calling layer (may sleep).
5588 struct ata_port *ata_port_alloc(struct ata_host *host)
5590 struct ata_port *ap;
5594 ap = kzalloc(sizeof(*ap), GFP_KERNEL);
5598 ap->pflags |= ATA_PFLAG_INITIALIZING | ATA_PFLAG_FROZEN;
5599 ap->lock = &host->lock;
5602 ap->dev = host->dev;
5604 #if defined(ATA_VERBOSE_DEBUG)
5605 /* turn on all debugging levels */
5606 ap->msg_enable = 0x00FF;
5607 #elif defined(ATA_DEBUG)
5608 ap->msg_enable = ATA_MSG_DRV | ATA_MSG_INFO | ATA_MSG_CTL | ATA_MSG_WARN | ATA_MSG_ERR;
5610 ap->msg_enable = ATA_MSG_DRV | ATA_MSG_ERR | ATA_MSG_WARN;
5613 mutex_init(&ap->scsi_scan_mutex);
5614 INIT_DELAYED_WORK(&ap->hotplug_task, ata_scsi_hotplug);
5615 INIT_WORK(&ap->scsi_rescan_task, ata_scsi_dev_rescan);
5616 INIT_LIST_HEAD(&ap->eh_done_q);
5617 init_waitqueue_head(&ap->eh_wait_q);
5618 init_completion(&ap->park_req_pending);
5619 init_timer_deferrable(&ap->fastdrain_timer);
5620 ap->fastdrain_timer.function = ata_eh_fastdrain_timerfn;
5621 ap->fastdrain_timer.data = (unsigned long)ap;
5623 ap->cbl = ATA_CBL_NONE;
5625 ata_link_init(ap, &ap->link, 0);
5628 ap->stats.unhandled_irq = 1;
5629 ap->stats.idle_irq = 1;
5631 ata_sff_port_init(ap);
5636 static void ata_host_release(struct device *gendev, void *res)
5638 struct ata_host *host = dev_get_drvdata(gendev);
5641 for (i = 0; i < host->n_ports; i++) {
5642 struct ata_port *ap = host->ports[i];
5648 scsi_host_put(ap->scsi_host);
5650 kfree(ap->pmp_link);
5651 kfree(ap->slave_link);
5653 host->ports[i] = NULL;
5656 dev_set_drvdata(gendev, NULL);
5660 * ata_host_alloc - allocate and init basic ATA host resources
5661 * @dev: generic device this host is associated with
5662 * @max_ports: maximum number of ATA ports associated with this host
5664 * Allocate and initialize basic ATA host resources. LLD calls
5665 * this function to allocate a host, initializes it fully and
5666 * attaches it using ata_host_register().
5668 * @max_ports ports are allocated and host->n_ports is
5669 * initialized to @max_ports. The caller is allowed to decrease
5670 * host->n_ports before calling ata_host_register(). The unused
5671 * ports will be automatically freed on registration.
5674 * Allocate ATA host on success, NULL on failure.
5677 * Inherited from calling layer (may sleep).
5679 struct ata_host *ata_host_alloc(struct device *dev, int max_ports)
5681 struct ata_host *host;
5687 if (!devres_open_group(dev, NULL, GFP_KERNEL))
5690 /* alloc a container for our list of ATA ports (buses) */
5691 sz = sizeof(struct ata_host) + (max_ports + 1) * sizeof(void *);
5692 /* alloc a container for our list of ATA ports (buses) */
5693 host = devres_alloc(ata_host_release, sz, GFP_KERNEL);
5697 devres_add(dev, host);
5698 dev_set_drvdata(dev, host);
5700 spin_lock_init(&host->lock);
5701 mutex_init(&host->eh_mutex);
5703 host->n_ports = max_ports;
5705 /* allocate ports bound to this host */
5706 for (i = 0; i < max_ports; i++) {
5707 struct ata_port *ap;
5709 ap = ata_port_alloc(host);
5714 host->ports[i] = ap;
5717 devres_remove_group(dev, NULL);
5721 devres_release_group(dev, NULL);
5726 * ata_host_alloc_pinfo - alloc host and init with port_info array
5727 * @dev: generic device this host is associated with
5728 * @ppi: array of ATA port_info to initialize host with
5729 * @n_ports: number of ATA ports attached to this host
5731 * Allocate ATA host and initialize with info from @ppi. If NULL
5732 * terminated, @ppi may contain fewer entries than @n_ports. The
5733 * last entry will be used for the remaining ports.
5736 * Allocate ATA host on success, NULL on failure.
5739 * Inherited from calling layer (may sleep).
5741 struct ata_host *ata_host_alloc_pinfo(struct device *dev,
5742 const struct ata_port_info * const * ppi,
5745 const struct ata_port_info *pi;
5746 struct ata_host *host;
5749 host = ata_host_alloc(dev, n_ports);
5753 for (i = 0, j = 0, pi = NULL; i < host->n_ports; i++) {
5754 struct ata_port *ap = host->ports[i];
5759 ap->pio_mask = pi->pio_mask;
5760 ap->mwdma_mask = pi->mwdma_mask;
5761 ap->udma_mask = pi->udma_mask;
5762 ap->flags |= pi->flags;
5763 ap->link.flags |= pi->link_flags;
5764 ap->ops = pi->port_ops;
5766 if (!host->ops && (pi->port_ops != &ata_dummy_port_ops))
5767 host->ops = pi->port_ops;
5774 * ata_slave_link_init - initialize slave link
5775 * @ap: port to initialize slave link for
5777 * Create and initialize slave link for @ap. This enables slave
5778 * link handling on the port.
5780 * In libata, a port contains links and a link contains devices.
5781 * There is single host link but if a PMP is attached to it,
5782 * there can be multiple fan-out links. On SATA, there's usually
5783 * a single device connected to a link but PATA and SATA
5784 * controllers emulating TF based interface can have two - master
5787 * However, there are a few controllers which don't fit into this
5788 * abstraction too well - SATA controllers which emulate TF
5789 * interface with both master and slave devices but also have
5790 * separate SCR register sets for each device. These controllers
5791 * need separate links for physical link handling
5792 * (e.g. onlineness, link speed) but should be treated like a
5793 * traditional M/S controller for everything else (e.g. command
5794 * issue, softreset).
5796 * slave_link is libata's way of handling this class of
5797 * controllers without impacting core layer too much. For
5798 * anything other than physical link handling, the default host
5799 * link is used for both master and slave. For physical link
5800 * handling, separate @ap->slave_link is used. All dirty details
5801 * are implemented inside libata core layer. From LLD's POV, the
5802 * only difference is that prereset, hardreset and postreset are
5803 * called once more for the slave link, so the reset sequence
5804 * looks like the following.
5806 * prereset(M) -> prereset(S) -> hardreset(M) -> hardreset(S) ->
5807 * softreset(M) -> postreset(M) -> postreset(S)
5809 * Note that softreset is called only for the master. Softreset
5810 * resets both M/S by definition, so SRST on master should handle
5811 * both (the standard method will work just fine).
5814 * Should be called before host is registered.
5817 * 0 on success, -errno on failure.
5819 int ata_slave_link_init(struct ata_port *ap)
5821 struct ata_link *link;
5823 WARN_ON(ap->slave_link);
5824 WARN_ON(ap->flags & ATA_FLAG_PMP);
5826 link = kzalloc(sizeof(*link), GFP_KERNEL);
5830 ata_link_init(ap, link, 1);
5831 ap->slave_link = link;
5835 static void ata_host_stop(struct device *gendev, void *res)
5837 struct ata_host *host = dev_get_drvdata(gendev);
5840 WARN_ON(!(host->flags & ATA_HOST_STARTED));
5842 for (i = 0; i < host->n_ports; i++) {
5843 struct ata_port *ap = host->ports[i];
5845 if (ap->ops->port_stop)
5846 ap->ops->port_stop(ap);
5849 if (host->ops->host_stop)
5850 host->ops->host_stop(host);
5854 * ata_finalize_port_ops - finalize ata_port_operations
5855 * @ops: ata_port_operations to finalize
5857 * An ata_port_operations can inherit from another ops and that
5858 * ops can again inherit from another. This can go on as many
5859 * times as necessary as long as there is no loop in the
5860 * inheritance chain.
5862 * Ops tables are finalized when the host is started. NULL or
5863 * unspecified entries are inherited from the closet ancestor
5864 * which has the method and the entry is populated with it.
5865 * After finalization, the ops table directly points to all the
5866 * methods and ->inherits is no longer necessary and cleared.
5868 * Using ATA_OP_NULL, inheriting ops can force a method to NULL.
5873 static void ata_finalize_port_ops(struct ata_port_operations *ops)
5875 static DEFINE_SPINLOCK(lock);
5876 const struct ata_port_operations *cur;
5877 void **begin = (void **)ops;
5878 void **end = (void **)&ops->inherits;
5881 if (!ops || !ops->inherits)
5886 for (cur = ops->inherits; cur; cur = cur->inherits) {
5887 void **inherit = (void **)cur;
5889 for (pp = begin; pp < end; pp++, inherit++)
5894 for (pp = begin; pp < end; pp++)
5898 ops->inherits = NULL;
5904 * ata_host_start - start and freeze ports of an ATA host
5905 * @host: ATA host to start ports for
5907 * Start and then freeze ports of @host. Started status is
5908 * recorded in host->flags, so this function can be called
5909 * multiple times. Ports are guaranteed to get started only
5910 * once. If host->ops isn't initialized yet, its set to the
5911 * first non-dummy port ops.
5914 * Inherited from calling layer (may sleep).
5917 * 0 if all ports are started successfully, -errno otherwise.
5919 int ata_host_start(struct ata_host *host)
5922 void *start_dr = NULL;
5925 if (host->flags & ATA_HOST_STARTED)
5928 ata_finalize_port_ops(host->ops);
5930 for (i = 0; i < host->n_ports; i++) {
5931 struct ata_port *ap = host->ports[i];
5933 ata_finalize_port_ops(ap->ops);
5935 if (!host->ops && !ata_port_is_dummy(ap))
5936 host->ops = ap->ops;
5938 if (ap->ops->port_stop)
5942 if (host->ops->host_stop)
5946 start_dr = devres_alloc(ata_host_stop, 0, GFP_KERNEL);
5951 for (i = 0; i < host->n_ports; i++) {
5952 struct ata_port *ap = host->ports[i];
5954 if (ap->ops->port_start) {
5955 rc = ap->ops->port_start(ap);
5959 "failed to start port %d (errno=%d)\n",
5964 ata_eh_freeze_port(ap);
5968 devres_add(host->dev, start_dr);
5969 host->flags |= ATA_HOST_STARTED;
5974 struct ata_port *ap = host->ports[i];
5976 if (ap->ops->port_stop)
5977 ap->ops->port_stop(ap);
5979 devres_free(start_dr);
5984 * ata_sas_host_init - Initialize a host struct for sas (ipr, libsas)
5985 * @host: host to initialize
5986 * @dev: device host is attached to
5990 void ata_host_init(struct ata_host *host, struct device *dev,
5991 struct ata_port_operations *ops)
5993 spin_lock_init(&host->lock);
5994 mutex_init(&host->eh_mutex);
5999 void __ata_port_probe(struct ata_port *ap)
6001 struct ata_eh_info *ehi = &ap->link.eh_info;
6002 unsigned long flags;
6004 /* kick EH for boot probing */
6005 spin_lock_irqsave(ap->lock, flags);
6007 ehi->probe_mask |= ATA_ALL_DEVICES;
6008 ehi->action |= ATA_EH_RESET;
6009 ehi->flags |= ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET;
6011 ap->pflags &= ~ATA_PFLAG_INITIALIZING;
6012 ap->pflags |= ATA_PFLAG_LOADING;
6013 ata_port_schedule_eh(ap);
6015 spin_unlock_irqrestore(ap->lock, flags);
6018 int ata_port_probe(struct ata_port *ap)
6022 if (ap->ops->error_handler) {
6023 __ata_port_probe(ap);
6024 ata_port_wait_eh(ap);
6026 DPRINTK("ata%u: bus probe begin\n", ap->print_id);
6027 rc = ata_bus_probe(ap);
6028 DPRINTK("ata%u: bus probe end\n", ap->print_id);
6034 static void async_port_probe(void *data, async_cookie_t cookie)
6036 struct ata_port *ap = data;
6039 * If we're not allowed to scan this host in parallel,
6040 * we need to wait until all previous scans have completed
6041 * before going further.
6042 * Jeff Garzik says this is only within a controller, so we
6043 * don't need to wait for port 0, only for later ports.
6045 if (!(ap->host->flags & ATA_HOST_PARALLEL_SCAN) && ap->port_no != 0)
6046 async_synchronize_cookie(cookie);
6048 (void)ata_port_probe(ap);
6050 /* in order to keep device order, we need to synchronize at this point */
6051 async_synchronize_cookie(cookie);
6053 ata_scsi_scan_host(ap, 1);
6057 * ata_host_register - register initialized ATA host
6058 * @host: ATA host to register
6059 * @sht: template for SCSI host
6061 * Register initialized ATA host. @host is allocated using
6062 * ata_host_alloc() and fully initialized by LLD. This function
6063 * starts ports, registers @host with ATA and SCSI layers and
6064 * probe registered devices.
6067 * Inherited from calling layer (may sleep).
6070 * 0 on success, -errno otherwise.
6072 int ata_host_register(struct ata_host *host, struct scsi_host_template *sht)
6076 /* host must have been started */
6077 if (!(host->flags & ATA_HOST_STARTED)) {
6078 dev_err(host->dev, "BUG: trying to register unstarted host\n");
6083 /* Blow away unused ports. This happens when LLD can't
6084 * determine the exact number of ports to allocate at
6087 for (i = host->n_ports; host->ports[i]; i++)
6088 kfree(host->ports[i]);
6090 /* give ports names and add SCSI hosts */
6091 for (i = 0; i < host->n_ports; i++)
6092 host->ports[i]->print_id = atomic_inc_return(&ata_print_id);
6095 /* Create associated sysfs transport objects */
6096 for (i = 0; i < host->n_ports; i++) {
6097 rc = ata_tport_add(host->dev,host->ports[i]);
6103 rc = ata_scsi_add_hosts(host, sht);
6107 /* set cable, sata_spd_limit and report */
6108 for (i = 0; i < host->n_ports; i++) {
6109 struct ata_port *ap = host->ports[i];
6110 unsigned long xfer_mask;
6112 /* set SATA cable type if still unset */
6113 if (ap->cbl == ATA_CBL_NONE && (ap->flags & ATA_FLAG_SATA))
6114 ap->cbl = ATA_CBL_SATA;
6116 /* init sata_spd_limit to the current value */
6117 sata_link_init_spd(&ap->link);
6119 sata_link_init_spd(ap->slave_link);
6121 /* print per-port info to dmesg */
6122 xfer_mask = ata_pack_xfermask(ap->pio_mask, ap->mwdma_mask,
6125 if (!ata_port_is_dummy(ap)) {
6126 ata_port_info(ap, "%cATA max %s %s\n",
6127 (ap->flags & ATA_FLAG_SATA) ? 'S' : 'P',
6128 ata_mode_string(xfer_mask),
6129 ap->link.eh_info.desc);
6130 ata_ehi_clear_desc(&ap->link.eh_info);
6132 ata_port_info(ap, "DUMMY\n");
6135 /* perform each probe asynchronously */
6136 for (i = 0; i < host->n_ports; i++) {
6137 struct ata_port *ap = host->ports[i];
6138 async_schedule(async_port_probe, ap);
6145 ata_tport_delete(host->ports[i]);
6152 * ata_host_activate - start host, request IRQ and register it
6153 * @host: target ATA host
6154 * @irq: IRQ to request
6155 * @irq_handler: irq_handler used when requesting IRQ
6156 * @irq_flags: irq_flags used when requesting IRQ
6157 * @sht: scsi_host_template to use when registering the host
6159 * After allocating an ATA host and initializing it, most libata
6160 * LLDs perform three steps to activate the host - start host,
6161 * request IRQ and register it. This helper takes necessasry
6162 * arguments and performs the three steps in one go.
6164 * An invalid IRQ skips the IRQ registration and expects the host to
6165 * have set polling mode on the port. In this case, @irq_handler
6169 * Inherited from calling layer (may sleep).
6172 * 0 on success, -errno otherwise.
6174 int ata_host_activate(struct ata_host *host, int irq,
6175 irq_handler_t irq_handler, unsigned long irq_flags,
6176 struct scsi_host_template *sht)
6180 rc = ata_host_start(host);
6184 /* Special case for polling mode */
6186 WARN_ON(irq_handler);
6187 return ata_host_register(host, sht);
6190 rc = devm_request_irq(host->dev, irq, irq_handler, irq_flags,
6191 dev_driver_string(host->dev), host);
6195 for (i = 0; i < host->n_ports; i++)
6196 ata_port_desc(host->ports[i], "irq %d", irq);
6198 rc = ata_host_register(host, sht);
6199 /* if failed, just free the IRQ and leave ports alone */
6201 devm_free_irq(host->dev, irq, host);
6207 * ata_port_detach - Detach ATA port in prepration of device removal
6208 * @ap: ATA port to be detached
6210 * Detach all ATA devices and the associated SCSI devices of @ap;
6211 * then, remove the associated SCSI host. @ap is guaranteed to
6212 * be quiescent on return from this function.
6215 * Kernel thread context (may sleep).
6217 static void ata_port_detach(struct ata_port *ap)
6219 unsigned long flags;
6221 if (!ap->ops->error_handler)
6224 /* tell EH we're leaving & flush EH */
6225 spin_lock_irqsave(ap->lock, flags);
6226 ap->pflags |= ATA_PFLAG_UNLOADING;
6227 ata_port_schedule_eh(ap);
6228 spin_unlock_irqrestore(ap->lock, flags);
6230 /* wait till EH commits suicide */
6231 ata_port_wait_eh(ap);
6233 /* it better be dead now */
6234 WARN_ON(!(ap->pflags & ATA_PFLAG_UNLOADED));
6236 cancel_delayed_work_sync(&ap->hotplug_task);
6241 for (i = 0; i < SATA_PMP_MAX_PORTS; i++)
6242 ata_tlink_delete(&ap->pmp_link[i]);
6244 ata_tport_delete(ap);
6246 /* remove the associated SCSI host */
6247 scsi_remove_host(ap->scsi_host);
6251 * ata_host_detach - Detach all ports of an ATA host
6252 * @host: Host to detach
6254 * Detach all ports of @host.
6257 * Kernel thread context (may sleep).
6259 void ata_host_detach(struct ata_host *host)
6263 for (i = 0; i < host->n_ports; i++)
6264 ata_port_detach(host->ports[i]);
6266 /* the host is dead now, dissociate ACPI */
6267 ata_acpi_dissociate(host);
6273 * ata_pci_remove_one - PCI layer callback for device removal
6274 * @pdev: PCI device that was removed
6276 * PCI layer indicates to libata via this hook that hot-unplug or
6277 * module unload event has occurred. Detach all ports. Resource
6278 * release is handled via devres.
6281 * Inherited from PCI layer (may sleep).
6283 void ata_pci_remove_one(struct pci_dev *pdev)
6285 struct device *dev = &pdev->dev;
6286 struct ata_host *host = dev_get_drvdata(dev);
6288 ata_host_detach(host);
6291 /* move to PCI subsystem */
6292 int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits)
6294 unsigned long tmp = 0;
6296 switch (bits->width) {
6299 pci_read_config_byte(pdev, bits->reg, &tmp8);
6305 pci_read_config_word(pdev, bits->reg, &tmp16);
6311 pci_read_config_dword(pdev, bits->reg, &tmp32);
6322 return (tmp == bits->val) ? 1 : 0;
6326 void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg)
6328 pci_save_state(pdev);
6329 pci_disable_device(pdev);
6331 if (mesg.event & PM_EVENT_SLEEP)
6332 pci_set_power_state(pdev, PCI_D3hot);
6335 int ata_pci_device_do_resume(struct pci_dev *pdev)
6339 pci_set_power_state(pdev, PCI_D0);
6340 pci_restore_state(pdev);
6342 rc = pcim_enable_device(pdev);
6345 "failed to enable device after resume (%d)\n", rc);
6349 pci_set_master(pdev);
6353 int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg)
6355 struct ata_host *host = dev_get_drvdata(&pdev->dev);
6358 rc = ata_host_suspend(host, mesg);
6362 ata_pci_device_do_suspend(pdev, mesg);
6367 int ata_pci_device_resume(struct pci_dev *pdev)
6369 struct ata_host *host = dev_get_drvdata(&pdev->dev);
6372 rc = ata_pci_device_do_resume(pdev);
6374 ata_host_resume(host);
6377 #endif /* CONFIG_PM */
6379 #endif /* CONFIG_PCI */
6381 static int __init ata_parse_force_one(char **cur,
6382 struct ata_force_ent *force_ent,
6383 const char **reason)
6385 /* FIXME: Currently, there's no way to tag init const data and
6386 * using __initdata causes build failure on some versions of
6387 * gcc. Once __initdataconst is implemented, add const to the
6388 * following structure.
6390 static struct ata_force_param force_tbl[] __initdata = {
6391 { "40c", .cbl = ATA_CBL_PATA40 },
6392 { "80c", .cbl = ATA_CBL_PATA80 },
6393 { "short40c", .cbl = ATA_CBL_PATA40_SHORT },
6394 { "unk", .cbl = ATA_CBL_PATA_UNK },
6395 { "ign", .cbl = ATA_CBL_PATA_IGN },
6396 { "sata", .cbl = ATA_CBL_SATA },
6397 { "1.5Gbps", .spd_limit = 1 },
6398 { "3.0Gbps", .spd_limit = 2 },
6399 { "noncq", .horkage_on = ATA_HORKAGE_NONCQ },
6400 { "ncq", .horkage_off = ATA_HORKAGE_NONCQ },
6401 { "dump_id", .horkage_on = ATA_HORKAGE_DUMP_ID },
6402 { "pio0", .xfer_mask = 1 << (ATA_SHIFT_PIO + 0) },
6403 { "pio1", .xfer_mask = 1 << (ATA_SHIFT_PIO + 1) },
6404 { "pio2", .xfer_mask = 1 << (ATA_SHIFT_PIO + 2) },
6405 { "pio3", .xfer_mask = 1 << (ATA_SHIFT_PIO + 3) },
6406 { "pio4", .xfer_mask = 1 << (ATA_SHIFT_PIO + 4) },
6407 { "pio5", .xfer_mask = 1 << (ATA_SHIFT_PIO + 5) },
6408 { "pio6", .xfer_mask = 1 << (ATA_SHIFT_PIO + 6) },
6409 { "mwdma0", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 0) },
6410 { "mwdma1", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 1) },
6411 { "mwdma2", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 2) },
6412 { "mwdma3", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 3) },
6413 { "mwdma4", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 4) },
6414 { "udma0", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 0) },
6415 { "udma16", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 0) },
6416 { "udma/16", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 0) },
6417 { "udma1", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 1) },
6418 { "udma25", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 1) },
6419 { "udma/25", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 1) },
6420 { "udma2", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 2) },
6421 { "udma33", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 2) },
6422 { "udma/33", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 2) },
6423 { "udma3", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 3) },
6424 { "udma44", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 3) },
6425 { "udma/44", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 3) },
6426 { "udma4", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 4) },
6427 { "udma66", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 4) },
6428 { "udma/66", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 4) },
6429 { "udma5", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 5) },
6430 { "udma100", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 5) },
6431 { "udma/100", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 5) },
6432 { "udma6", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 6) },
6433 { "udma133", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 6) },
6434 { "udma/133", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 6) },
6435 { "udma7", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 7) },
6436 { "nohrst", .lflags = ATA_LFLAG_NO_HRST },
6437 { "nosrst", .lflags = ATA_LFLAG_NO_SRST },
6438 { "norst", .lflags = ATA_LFLAG_NO_HRST | ATA_LFLAG_NO_SRST },
6439 { "rstonce", .lflags = ATA_LFLAG_RST_ONCE },
6441 char *start = *cur, *p = *cur;
6442 char *id, *val, *endp;
6443 const struct ata_force_param *match_fp = NULL;
6444 int nr_matches = 0, i;
6446 /* find where this param ends and update *cur */
6447 while (*p != '\0' && *p != ',')
6458 p = strchr(start, ':');
6460 val = strstrip(start);
6465 id = strstrip(start);
6466 val = strstrip(p + 1);
6469 p = strchr(id, '.');
6472 force_ent->device = simple_strtoul(p, &endp, 10);
6473 if (p == endp || *endp != '\0') {
6474 *reason = "invalid device";
6479 force_ent->port = simple_strtoul(id, &endp, 10);
6480 if (p == endp || *endp != '\0') {
6481 *reason = "invalid port/link";
6486 /* parse val, allow shortcuts so that both 1.5 and 1.5Gbps work */
6487 for (i = 0; i < ARRAY_SIZE(force_tbl); i++) {
6488 const struct ata_force_param *fp = &force_tbl[i];
6490 if (strncasecmp(val, fp->name, strlen(val)))
6496 if (strcasecmp(val, fp->name) == 0) {
6503 *reason = "unknown value";
6506 if (nr_matches > 1) {
6507 *reason = "ambigious value";
6511 force_ent->param = *match_fp;
6516 static void __init ata_parse_force_param(void)
6518 int idx = 0, size = 1;
6519 int last_port = -1, last_device = -1;
6520 char *p, *cur, *next;
6522 /* calculate maximum number of params and allocate force_tbl */
6523 for (p = ata_force_param_buf; *p; p++)
6527 ata_force_tbl = kzalloc(sizeof(ata_force_tbl[0]) * size, GFP_KERNEL);
6528 if (!ata_force_tbl) {
6529 printk(KERN_WARNING "ata: failed to extend force table, "
6530 "libata.force ignored\n");
6534 /* parse and populate the table */
6535 for (cur = ata_force_param_buf; *cur != '\0'; cur = next) {
6536 const char *reason = "";
6537 struct ata_force_ent te = { .port = -1, .device = -1 };
6540 if (ata_parse_force_one(&next, &te, &reason)) {
6541 printk(KERN_WARNING "ata: failed to parse force "
6542 "parameter \"%s\" (%s)\n",
6547 if (te.port == -1) {
6548 te.port = last_port;
6549 te.device = last_device;
6552 ata_force_tbl[idx++] = te;
6554 last_port = te.port;
6555 last_device = te.device;
6558 ata_force_tbl_size = idx;
6561 static int __init ata_init(void)
6565 ata_parse_force_param();
6567 ata_acpi_register();
6569 rc = ata_sff_init();
6571 kfree(ata_force_tbl);
6575 libata_transport_init();
6576 ata_scsi_transport_template = ata_attach_transport();
6577 if (!ata_scsi_transport_template) {
6583 printk(KERN_DEBUG "libata version " DRV_VERSION " loaded.\n");
6590 static void __exit ata_exit(void)
6592 ata_release_transport(ata_scsi_transport_template);
6593 libata_transport_exit();
6595 ata_acpi_unregister();
6596 kfree(ata_force_tbl);
6599 subsys_initcall(ata_init);
6600 module_exit(ata_exit);
6602 static DEFINE_RATELIMIT_STATE(ratelimit, HZ / 5, 1);
6604 int ata_ratelimit(void)
6606 return __ratelimit(&ratelimit);
6610 * ata_msleep - ATA EH owner aware msleep
6611 * @ap: ATA port to attribute the sleep to
6612 * @msecs: duration to sleep in milliseconds
6614 * Sleeps @msecs. If the current task is owner of @ap's EH, the
6615 * ownership is released before going to sleep and reacquired
6616 * after the sleep is complete. IOW, other ports sharing the
6617 * @ap->host will be allowed to own the EH while this task is
6623 void ata_msleep(struct ata_port *ap, unsigned int msecs)
6625 bool owns_eh = ap && ap->host->eh_owner == current;
6637 * ata_wait_register - wait until register value changes
6638 * @ap: ATA port to wait register for, can be NULL
6639 * @reg: IO-mapped register
6640 * @mask: Mask to apply to read register value
6641 * @val: Wait condition
6642 * @interval: polling interval in milliseconds
6643 * @timeout: timeout in milliseconds
6645 * Waiting for some bits of register to change is a common
6646 * operation for ATA controllers. This function reads 32bit LE
6647 * IO-mapped register @reg and tests for the following condition.
6649 * (*@reg & mask) != val
6651 * If the condition is met, it returns; otherwise, the process is
6652 * repeated after @interval_msec until timeout.
6655 * Kernel thread context (may sleep)
6658 * The final register value.
6660 u32 ata_wait_register(struct ata_port *ap, void __iomem *reg, u32 mask, u32 val,
6661 unsigned long interval, unsigned long timeout)
6663 unsigned long deadline;
6666 tmp = ioread32(reg);
6668 /* Calculate timeout _after_ the first read to make sure
6669 * preceding writes reach the controller before starting to
6670 * eat away the timeout.
6672 deadline = ata_deadline(jiffies, timeout);
6674 while ((tmp & mask) == val && time_before(jiffies, deadline)) {
6675 ata_msleep(ap, interval);
6676 tmp = ioread32(reg);
6685 static unsigned int ata_dummy_qc_issue(struct ata_queued_cmd *qc)
6687 return AC_ERR_SYSTEM;
6690 static void ata_dummy_error_handler(struct ata_port *ap)
6695 struct ata_port_operations ata_dummy_port_ops = {
6696 .qc_prep = ata_noop_qc_prep,
6697 .qc_issue = ata_dummy_qc_issue,
6698 .error_handler = ata_dummy_error_handler,
6699 .sched_eh = ata_std_sched_eh,
6700 .end_eh = ata_std_end_eh,
6703 const struct ata_port_info ata_dummy_port_info = {
6704 .port_ops = &ata_dummy_port_ops,
6708 * Utility print functions
6710 int ata_port_printk(const struct ata_port *ap, const char *level,
6711 const char *fmt, ...)
6713 struct va_format vaf;
6717 va_start(args, fmt);
6722 r = printk("%sata%u: %pV", level, ap->print_id, &vaf);
6728 EXPORT_SYMBOL(ata_port_printk);
6730 int ata_link_printk(const struct ata_link *link, const char *level,
6731 const char *fmt, ...)
6733 struct va_format vaf;
6737 va_start(args, fmt);
6742 if (sata_pmp_attached(link->ap) || link->ap->slave_link)
6743 r = printk("%sata%u.%02u: %pV",
6744 level, link->ap->print_id, link->pmp, &vaf);
6746 r = printk("%sata%u: %pV",
6747 level, link->ap->print_id, &vaf);
6753 EXPORT_SYMBOL(ata_link_printk);
6755 int ata_dev_printk(const struct ata_device *dev, const char *level,
6756 const char *fmt, ...)
6758 struct va_format vaf;
6762 va_start(args, fmt);
6767 r = printk("%sata%u.%02u: %pV",
6768 level, dev->link->ap->print_id, dev->link->pmp + dev->devno,
6775 EXPORT_SYMBOL(ata_dev_printk);
6777 void ata_print_version(const struct device *dev, const char *version)
6779 dev_printk(KERN_DEBUG, dev, "version %s\n", version);
6781 EXPORT_SYMBOL(ata_print_version);
6784 * libata is essentially a library of internal helper functions for
6785 * low-level ATA host controller drivers. As such, the API/ABI is
6786 * likely to change as new drivers are added and updated.
6787 * Do not depend on ABI/API stability.
6789 EXPORT_SYMBOL_GPL(sata_deb_timing_normal);
6790 EXPORT_SYMBOL_GPL(sata_deb_timing_hotplug);
6791 EXPORT_SYMBOL_GPL(sata_deb_timing_long);
6792 EXPORT_SYMBOL_GPL(ata_base_port_ops);
6793 EXPORT_SYMBOL_GPL(sata_port_ops);
6794 EXPORT_SYMBOL_GPL(ata_dummy_port_ops);
6795 EXPORT_SYMBOL_GPL(ata_dummy_port_info);
6796 EXPORT_SYMBOL_GPL(ata_link_next);
6797 EXPORT_SYMBOL_GPL(ata_dev_next);
6798 EXPORT_SYMBOL_GPL(ata_std_bios_param);
6799 EXPORT_SYMBOL_GPL(ata_scsi_unlock_native_capacity);
6800 EXPORT_SYMBOL_GPL(ata_host_init);
6801 EXPORT_SYMBOL_GPL(ata_host_alloc);
6802 EXPORT_SYMBOL_GPL(ata_host_alloc_pinfo);
6803 EXPORT_SYMBOL_GPL(ata_slave_link_init);
6804 EXPORT_SYMBOL_GPL(ata_host_start);
6805 EXPORT_SYMBOL_GPL(ata_host_register);
6806 EXPORT_SYMBOL_GPL(ata_host_activate);
6807 EXPORT_SYMBOL_GPL(ata_host_detach);
6808 EXPORT_SYMBOL_GPL(ata_sg_init);
6809 EXPORT_SYMBOL_GPL(ata_qc_complete);
6810 EXPORT_SYMBOL_GPL(ata_qc_complete_multiple);
6811 EXPORT_SYMBOL_GPL(atapi_cmd_type);
6812 EXPORT_SYMBOL_GPL(ata_tf_to_fis);
6813 EXPORT_SYMBOL_GPL(ata_tf_from_fis);
6814 EXPORT_SYMBOL_GPL(ata_pack_xfermask);
6815 EXPORT_SYMBOL_GPL(ata_unpack_xfermask);
6816 EXPORT_SYMBOL_GPL(ata_xfer_mask2mode);
6817 EXPORT_SYMBOL_GPL(ata_xfer_mode2mask);
6818 EXPORT_SYMBOL_GPL(ata_xfer_mode2shift);
6819 EXPORT_SYMBOL_GPL(ata_mode_string);
6820 EXPORT_SYMBOL_GPL(ata_id_xfermask);
6821 EXPORT_SYMBOL_GPL(ata_do_set_mode);
6822 EXPORT_SYMBOL_GPL(ata_std_qc_defer);
6823 EXPORT_SYMBOL_GPL(ata_noop_qc_prep);
6824 EXPORT_SYMBOL_GPL(ata_dev_disable);
6825 EXPORT_SYMBOL_GPL(sata_set_spd);
6826 EXPORT_SYMBOL_GPL(ata_wait_after_reset);
6827 EXPORT_SYMBOL_GPL(sata_link_debounce);
6828 EXPORT_SYMBOL_GPL(sata_link_resume);
6829 EXPORT_SYMBOL_GPL(sata_link_scr_lpm);
6830 EXPORT_SYMBOL_GPL(ata_std_prereset);
6831 EXPORT_SYMBOL_GPL(sata_link_hardreset);
6832 EXPORT_SYMBOL_GPL(sata_std_hardreset);
6833 EXPORT_SYMBOL_GPL(ata_std_postreset);
6834 EXPORT_SYMBOL_GPL(ata_dev_classify);
6835 EXPORT_SYMBOL_GPL(ata_dev_pair);
6836 EXPORT_SYMBOL_GPL(ata_ratelimit);
6837 EXPORT_SYMBOL_GPL(ata_msleep);
6838 EXPORT_SYMBOL_GPL(ata_wait_register);
6839 EXPORT_SYMBOL_GPL(ata_scsi_queuecmd);
6840 EXPORT_SYMBOL_GPL(ata_scsi_slave_config);
6841 EXPORT_SYMBOL_GPL(ata_scsi_slave_destroy);
6842 EXPORT_SYMBOL_GPL(ata_scsi_change_queue_depth);
6843 EXPORT_SYMBOL_GPL(__ata_change_queue_depth);
6844 EXPORT_SYMBOL_GPL(sata_scr_valid);
6845 EXPORT_SYMBOL_GPL(sata_scr_read);
6846 EXPORT_SYMBOL_GPL(sata_scr_write);
6847 EXPORT_SYMBOL_GPL(sata_scr_write_flush);
6848 EXPORT_SYMBOL_GPL(ata_link_online);
6849 EXPORT_SYMBOL_GPL(ata_link_offline);
6851 EXPORT_SYMBOL_GPL(ata_host_suspend);
6852 EXPORT_SYMBOL_GPL(ata_host_resume);
6853 #endif /* CONFIG_PM */
6854 EXPORT_SYMBOL_GPL(ata_id_string);
6855 EXPORT_SYMBOL_GPL(ata_id_c_string);
6856 EXPORT_SYMBOL_GPL(ata_do_dev_read_id);
6857 EXPORT_SYMBOL_GPL(ata_scsi_simulate);
6859 EXPORT_SYMBOL_GPL(ata_pio_need_iordy);
6860 EXPORT_SYMBOL_GPL(ata_timing_find_mode);
6861 EXPORT_SYMBOL_GPL(ata_timing_compute);
6862 EXPORT_SYMBOL_GPL(ata_timing_merge);
6863 EXPORT_SYMBOL_GPL(ata_timing_cycle2mode);
6866 EXPORT_SYMBOL_GPL(pci_test_config_bits);
6867 EXPORT_SYMBOL_GPL(ata_pci_remove_one);
6869 EXPORT_SYMBOL_GPL(ata_pci_device_do_suspend);
6870 EXPORT_SYMBOL_GPL(ata_pci_device_do_resume);
6871 EXPORT_SYMBOL_GPL(ata_pci_device_suspend);
6872 EXPORT_SYMBOL_GPL(ata_pci_device_resume);
6873 #endif /* CONFIG_PM */
6874 #endif /* CONFIG_PCI */
6876 EXPORT_SYMBOL_GPL(__ata_ehi_push_desc);
6877 EXPORT_SYMBOL_GPL(ata_ehi_push_desc);
6878 EXPORT_SYMBOL_GPL(ata_ehi_clear_desc);
6879 EXPORT_SYMBOL_GPL(ata_port_desc);
6881 EXPORT_SYMBOL_GPL(ata_port_pbar_desc);
6882 #endif /* CONFIG_PCI */
6883 EXPORT_SYMBOL_GPL(ata_port_schedule_eh);
6884 EXPORT_SYMBOL_GPL(ata_link_abort);
6885 EXPORT_SYMBOL_GPL(ata_port_abort);
6886 EXPORT_SYMBOL_GPL(ata_port_freeze);
6887 EXPORT_SYMBOL_GPL(sata_async_notification);
6888 EXPORT_SYMBOL_GPL(ata_eh_freeze_port);
6889 EXPORT_SYMBOL_GPL(ata_eh_thaw_port);
6890 EXPORT_SYMBOL_GPL(ata_eh_qc_complete);
6891 EXPORT_SYMBOL_GPL(ata_eh_qc_retry);
6892 EXPORT_SYMBOL_GPL(ata_eh_analyze_ncq_error);
6893 EXPORT_SYMBOL_GPL(ata_do_eh);
6894 EXPORT_SYMBOL_GPL(ata_std_error_handler);
6896 EXPORT_SYMBOL_GPL(ata_cable_40wire);
6897 EXPORT_SYMBOL_GPL(ata_cable_80wire);
6898 EXPORT_SYMBOL_GPL(ata_cable_unknown);
6899 EXPORT_SYMBOL_GPL(ata_cable_ignore);
6900 EXPORT_SYMBOL_GPL(ata_cable_sata);