1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * libata-core.c - helper library for ATA
5 * Copyright 2003-2004 Red Hat, Inc. All rights reserved.
6 * Copyright 2003-2004 Jeff Garzik
8 * libata documentation is available via 'make {ps|pdf}docs',
9 * as Documentation/driver-api/libata.rst
11 * Hardware documentation available from http://www.t13.org/ and
12 * http://www.sata-io.org/
14 * Standards documents from:
15 * http://www.t13.org (ATA standards, PCI DMA IDE spec)
16 * http://www.t10.org (SCSI MMC - for ATAPI MMC)
17 * http://www.sata-io.org (SATA)
18 * http://www.compactflash.org (CF)
19 * http://www.qic.org (QIC157 - Tape and DSC)
20 * http://www.ce-ata.org (CE-ATA: not supported)
22 * libata is essentially a library of internal helper functions for
23 * low-level ATA host controller drivers. As such, the API/ABI is
24 * likely to change as new drivers are added and updated.
25 * Do not depend on ABI/API stability.
28 #include <linux/kernel.h>
29 #include <linux/module.h>
30 #include <linux/pci.h>
31 #include <linux/init.h>
32 #include <linux/list.h>
34 #include <linux/spinlock.h>
35 #include <linux/blkdev.h>
36 #include <linux/delay.h>
37 #include <linux/timer.h>
38 #include <linux/time.h>
39 #include <linux/interrupt.h>
40 #include <linux/completion.h>
41 #include <linux/suspend.h>
42 #include <linux/workqueue.h>
43 #include <linux/scatterlist.h>
45 #include <linux/log2.h>
46 #include <linux/slab.h>
47 #include <linux/glob.h>
48 #include <scsi/scsi.h>
49 #include <scsi/scsi_cmnd.h>
50 #include <scsi/scsi_host.h>
51 #include <linux/libata.h>
52 #include <asm/byteorder.h>
53 #include <asm/unaligned.h>
54 #include <linux/cdrom.h>
55 #include <linux/ratelimit.h>
56 #include <linux/leds.h>
57 #include <linux/pm_runtime.h>
58 #include <linux/platform_device.h>
59 #include <asm/setup.h>
61 #define CREATE_TRACE_POINTS
62 #include <trace/events/libata.h>
65 #include "libata-transport.h"
67 const struct ata_port_operations ata_base_port_ops = {
68 .prereset = ata_std_prereset,
69 .postreset = ata_std_postreset,
70 .error_handler = ata_std_error_handler,
71 .sched_eh = ata_std_sched_eh,
72 .end_eh = ata_std_end_eh,
75 const struct ata_port_operations sata_port_ops = {
76 .inherits = &ata_base_port_ops,
78 .qc_defer = ata_std_qc_defer,
79 .hardreset = sata_std_hardreset,
81 EXPORT_SYMBOL_GPL(sata_port_ops);
83 static unsigned int ata_dev_init_params(struct ata_device *dev,
84 u16 heads, u16 sectors);
85 static unsigned int ata_dev_set_xfermode(struct ata_device *dev);
86 static void ata_dev_xfermask(struct ata_device *dev);
87 static unsigned long ata_dev_blacklisted(const struct ata_device *dev);
89 atomic_t ata_print_id = ATOMIC_INIT(0);
91 #ifdef CONFIG_ATA_FORCE
92 struct ata_force_param {
96 unsigned int xfer_mask;
97 unsigned int horkage_on;
98 unsigned int horkage_off;
103 struct ata_force_ent {
106 struct ata_force_param param;
109 static struct ata_force_ent *ata_force_tbl;
110 static int ata_force_tbl_size;
112 static char ata_force_param_buf[COMMAND_LINE_SIZE] __initdata;
113 /* param_buf is thrown away after initialization, disallow read */
114 module_param_string(force, ata_force_param_buf, sizeof(ata_force_param_buf), 0);
115 MODULE_PARM_DESC(force, "Force ATA configurations including cable type, link speed and transfer mode (see Documentation/admin-guide/kernel-parameters.rst for details)");
118 static int atapi_enabled = 1;
119 module_param(atapi_enabled, int, 0444);
120 MODULE_PARM_DESC(atapi_enabled, "Enable discovery of ATAPI devices (0=off, 1=on [default])");
122 static int atapi_dmadir = 0;
123 module_param(atapi_dmadir, int, 0444);
124 MODULE_PARM_DESC(atapi_dmadir, "Enable ATAPI DMADIR bridge support (0=off [default], 1=on)");
126 int atapi_passthru16 = 1;
127 module_param(atapi_passthru16, int, 0444);
128 MODULE_PARM_DESC(atapi_passthru16, "Enable ATA_16 passthru for ATAPI devices (0=off, 1=on [default])");
131 module_param_named(fua, libata_fua, int, 0444);
132 MODULE_PARM_DESC(fua, "FUA support (0=off [default], 1=on)");
134 static int ata_ignore_hpa;
135 module_param_named(ignore_hpa, ata_ignore_hpa, int, 0644);
136 MODULE_PARM_DESC(ignore_hpa, "Ignore HPA limit (0=keep BIOS limits, 1=ignore limits, using full disk)");
138 static int libata_dma_mask = ATA_DMA_MASK_ATA|ATA_DMA_MASK_ATAPI|ATA_DMA_MASK_CFA;
139 module_param_named(dma, libata_dma_mask, int, 0444);
140 MODULE_PARM_DESC(dma, "DMA enable/disable (0x1==ATA, 0x2==ATAPI, 0x4==CF)");
142 static int ata_probe_timeout;
143 module_param(ata_probe_timeout, int, 0444);
144 MODULE_PARM_DESC(ata_probe_timeout, "Set ATA probing timeout (seconds)");
146 int libata_noacpi = 0;
147 module_param_named(noacpi, libata_noacpi, int, 0444);
148 MODULE_PARM_DESC(noacpi, "Disable the use of ACPI in probe/suspend/resume (0=off [default], 1=on)");
150 int libata_allow_tpm = 0;
151 module_param_named(allow_tpm, libata_allow_tpm, int, 0444);
152 MODULE_PARM_DESC(allow_tpm, "Permit the use of TPM commands (0=off [default], 1=on)");
155 module_param(atapi_an, int, 0444);
156 MODULE_PARM_DESC(atapi_an, "Enable ATAPI AN media presence notification (0=0ff [default], 1=on)");
158 MODULE_AUTHOR("Jeff Garzik");
159 MODULE_DESCRIPTION("Library module for ATA devices");
160 MODULE_LICENSE("GPL");
161 MODULE_VERSION(DRV_VERSION);
163 static inline bool ata_dev_print_info(struct ata_device *dev)
165 struct ata_eh_context *ehc = &dev->link->eh_context;
167 return ehc->i.flags & ATA_EHI_PRINTINFO;
170 static bool ata_sstatus_online(u32 sstatus)
172 return (sstatus & 0xf) == 0x3;
176 * ata_link_next - link iteration helper
177 * @link: the previous link, NULL to start
178 * @ap: ATA port containing links to iterate
179 * @mode: iteration mode, one of ATA_LITER_*
182 * Host lock or EH context.
185 * Pointer to the next link.
187 struct ata_link *ata_link_next(struct ata_link *link, struct ata_port *ap,
188 enum ata_link_iter_mode mode)
190 BUG_ON(mode != ATA_LITER_EDGE &&
191 mode != ATA_LITER_PMP_FIRST && mode != ATA_LITER_HOST_FIRST);
193 /* NULL link indicates start of iteration */
197 case ATA_LITER_PMP_FIRST:
198 if (sata_pmp_attached(ap))
201 case ATA_LITER_HOST_FIRST:
205 /* we just iterated over the host link, what's next? */
206 if (link == &ap->link)
208 case ATA_LITER_HOST_FIRST:
209 if (sata_pmp_attached(ap))
212 case ATA_LITER_PMP_FIRST:
213 if (unlikely(ap->slave_link))
214 return ap->slave_link;
220 /* slave_link excludes PMP */
221 if (unlikely(link == ap->slave_link))
224 /* we were over a PMP link */
225 if (++link < ap->pmp_link + ap->nr_pmp_links)
228 if (mode == ATA_LITER_PMP_FIRST)
233 EXPORT_SYMBOL_GPL(ata_link_next);
236 * ata_dev_next - device iteration helper
237 * @dev: the previous device, NULL to start
238 * @link: ATA link containing devices to iterate
239 * @mode: iteration mode, one of ATA_DITER_*
242 * Host lock or EH context.
245 * Pointer to the next device.
247 struct ata_device *ata_dev_next(struct ata_device *dev, struct ata_link *link,
248 enum ata_dev_iter_mode mode)
250 BUG_ON(mode != ATA_DITER_ENABLED && mode != ATA_DITER_ENABLED_REVERSE &&
251 mode != ATA_DITER_ALL && mode != ATA_DITER_ALL_REVERSE);
253 /* NULL dev indicates start of iteration */
256 case ATA_DITER_ENABLED:
260 case ATA_DITER_ENABLED_REVERSE:
261 case ATA_DITER_ALL_REVERSE:
262 dev = link->device + ata_link_max_devices(link) - 1;
267 /* move to the next one */
269 case ATA_DITER_ENABLED:
271 if (++dev < link->device + ata_link_max_devices(link))
274 case ATA_DITER_ENABLED_REVERSE:
275 case ATA_DITER_ALL_REVERSE:
276 if (--dev >= link->device)
282 if ((mode == ATA_DITER_ENABLED || mode == ATA_DITER_ENABLED_REVERSE) &&
283 !ata_dev_enabled(dev))
287 EXPORT_SYMBOL_GPL(ata_dev_next);
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;
314 #ifdef CONFIG_ATA_FORCE
316 * ata_force_cbl - force cable type according to libata.force
317 * @ap: ATA port of interest
319 * Force cable type according to libata.force and whine about it.
320 * The last entry which has matching port number is used, so it
321 * can be specified as part of device force parameters. For
322 * example, both "a:40c,1.00:udma4" and "1.00:40c,udma4" have the
328 void ata_force_cbl(struct ata_port *ap)
332 for (i = ata_force_tbl_size - 1; i >= 0; i--) {
333 const struct ata_force_ent *fe = &ata_force_tbl[i];
335 if (fe->port != -1 && fe->port != ap->print_id)
338 if (fe->param.cbl == ATA_CBL_NONE)
341 ap->cbl = fe->param.cbl;
342 ata_port_notice(ap, "FORCE: cable set to %s\n", fe->param.name);
348 * ata_force_link_limits - force link limits according to libata.force
349 * @link: ATA link of interest
351 * Force link flags and SATA spd limit according to libata.force
352 * and whine about it. When only the port part is specified
353 * (e.g. 1:), the limit applies to all links connected to both
354 * the host link and all fan-out ports connected via PMP. If the
355 * device part is specified as 0 (e.g. 1.00:), it specifies the
356 * first fan-out link not the host link. Device number 15 always
357 * points to the host link whether PMP is attached or not. If the
358 * controller has slave link, device number 16 points to it.
363 static void ata_force_link_limits(struct ata_link *link)
365 bool did_spd = false;
366 int linkno = link->pmp;
369 if (ata_is_host_link(link))
372 for (i = ata_force_tbl_size - 1; i >= 0; i--) {
373 const struct ata_force_ent *fe = &ata_force_tbl[i];
375 if (fe->port != -1 && fe->port != link->ap->print_id)
378 if (fe->device != -1 && fe->device != linkno)
381 /* only honor the first spd limit */
382 if (!did_spd && fe->param.spd_limit) {
383 link->hw_sata_spd_limit = (1 << fe->param.spd_limit) - 1;
384 ata_link_notice(link, "FORCE: PHY spd limit set to %s\n",
389 /* let lflags stack */
390 if (fe->param.lflags_on) {
391 link->flags |= fe->param.lflags_on;
392 ata_link_notice(link,
393 "FORCE: link flag 0x%x forced -> 0x%x\n",
394 fe->param.lflags_on, link->flags);
396 if (fe->param.lflags_off) {
397 link->flags &= ~fe->param.lflags_off;
398 ata_link_notice(link,
399 "FORCE: link flag 0x%x cleared -> 0x%x\n",
400 fe->param.lflags_off, link->flags);
406 * ata_force_xfermask - force xfermask according to libata.force
407 * @dev: ATA device of interest
409 * Force xfer_mask according to libata.force and whine about it.
410 * For consistency with link selection, device number 15 selects
411 * the first device connected to the host link.
416 static void ata_force_xfermask(struct ata_device *dev)
418 int devno = dev->link->pmp + dev->devno;
419 int alt_devno = devno;
422 /* allow n.15/16 for devices attached to host port */
423 if (ata_is_host_link(dev->link))
426 for (i = ata_force_tbl_size - 1; i >= 0; i--) {
427 const struct ata_force_ent *fe = &ata_force_tbl[i];
428 unsigned int pio_mask, mwdma_mask, udma_mask;
430 if (fe->port != -1 && fe->port != dev->link->ap->print_id)
433 if (fe->device != -1 && fe->device != devno &&
434 fe->device != alt_devno)
437 if (!fe->param.xfer_mask)
440 ata_unpack_xfermask(fe->param.xfer_mask,
441 &pio_mask, &mwdma_mask, &udma_mask);
443 dev->udma_mask = udma_mask;
444 else if (mwdma_mask) {
446 dev->mwdma_mask = mwdma_mask;
450 dev->pio_mask = pio_mask;
453 ata_dev_notice(dev, "FORCE: xfer_mask set to %s\n",
460 * ata_force_horkage - force horkage according to libata.force
461 * @dev: ATA device of interest
463 * Force horkage according to libata.force and whine about it.
464 * For consistency with link selection, device number 15 selects
465 * the first device connected to the host link.
470 static void ata_force_horkage(struct ata_device *dev)
472 int devno = dev->link->pmp + dev->devno;
473 int alt_devno = devno;
476 /* allow n.15/16 for devices attached to host port */
477 if (ata_is_host_link(dev->link))
480 for (i = 0; i < ata_force_tbl_size; i++) {
481 const struct ata_force_ent *fe = &ata_force_tbl[i];
483 if (fe->port != -1 && fe->port != dev->link->ap->print_id)
486 if (fe->device != -1 && fe->device != devno &&
487 fe->device != alt_devno)
490 if (!(~dev->horkage & fe->param.horkage_on) &&
491 !(dev->horkage & fe->param.horkage_off))
494 dev->horkage |= fe->param.horkage_on;
495 dev->horkage &= ~fe->param.horkage_off;
497 ata_dev_notice(dev, "FORCE: horkage modified (%s)\n",
502 static inline void ata_force_link_limits(struct ata_link *link) { }
503 static inline void ata_force_xfermask(struct ata_device *dev) { }
504 static inline void ata_force_horkage(struct ata_device *dev) { }
508 * atapi_cmd_type - Determine ATAPI command type from SCSI opcode
509 * @opcode: SCSI opcode
511 * Determine ATAPI command type from @opcode.
517 * ATAPI_{READ|WRITE|READ_CD|PASS_THRU|MISC}
519 int atapi_cmd_type(u8 opcode)
528 case GPCMD_WRITE_AND_VERIFY_10:
532 case GPCMD_READ_CD_MSF:
533 return ATAPI_READ_CD;
537 if (atapi_passthru16)
538 return ATAPI_PASS_THRU;
544 EXPORT_SYMBOL_GPL(atapi_cmd_type);
546 static const u8 ata_rw_cmds[] = {
550 ATA_CMD_READ_MULTI_EXT,
551 ATA_CMD_WRITE_MULTI_EXT,
559 ATA_CMD_PIO_READ_EXT,
560 ATA_CMD_PIO_WRITE_EXT,
573 ATA_CMD_WRITE_FUA_EXT
577 * ata_set_rwcmd_protocol - set taskfile r/w command and protocol
578 * @dev: target device for the taskfile
579 * @tf: taskfile to examine and configure
581 * Examine the device configuration and tf->flags to determine
582 * the proper read/write command and protocol to use for @tf.
587 static bool ata_set_rwcmd_protocol(struct ata_device *dev,
588 struct ata_taskfile *tf)
592 int index, fua, lba48, write;
594 fua = (tf->flags & ATA_TFLAG_FUA) ? 4 : 0;
595 lba48 = (tf->flags & ATA_TFLAG_LBA48) ? 2 : 0;
596 write = (tf->flags & ATA_TFLAG_WRITE) ? 1 : 0;
598 if (dev->flags & ATA_DFLAG_PIO) {
599 tf->protocol = ATA_PROT_PIO;
600 index = dev->multi_count ? 0 : 8;
601 } else if (lba48 && (dev->link->ap->flags & ATA_FLAG_PIO_LBA48)) {
602 /* Unable to use DMA due to host limitation */
603 tf->protocol = ATA_PROT_PIO;
604 index = dev->multi_count ? 0 : 8;
606 tf->protocol = ATA_PROT_DMA;
610 cmd = ata_rw_cmds[index + fua + lba48 + write];
620 * ata_tf_read_block - Read block address from ATA taskfile
621 * @tf: ATA taskfile of interest
622 * @dev: ATA device @tf belongs to
627 * Read block address from @tf. This function can handle all
628 * three address formats - LBA, LBA48 and CHS. tf->protocol and
629 * flags select the address format to use.
632 * Block address read from @tf.
634 u64 ata_tf_read_block(const struct ata_taskfile *tf, struct ata_device *dev)
638 if (tf->flags & ATA_TFLAG_LBA) {
639 if (tf->flags & ATA_TFLAG_LBA48) {
640 block |= (u64)tf->hob_lbah << 40;
641 block |= (u64)tf->hob_lbam << 32;
642 block |= (u64)tf->hob_lbal << 24;
644 block |= (tf->device & 0xf) << 24;
646 block |= tf->lbah << 16;
647 block |= tf->lbam << 8;
652 cyl = tf->lbam | (tf->lbah << 8);
653 head = tf->device & 0xf;
658 "device reported invalid CHS sector 0\n");
662 block = (cyl * dev->heads + head) * dev->sectors + sect - 1;
669 * Set a taskfile command duration limit index.
671 static inline void ata_set_tf_cdl(struct ata_queued_cmd *qc, int cdl)
673 struct ata_taskfile *tf = &qc->tf;
675 if (tf->protocol == ATA_PROT_NCQ)
676 tf->auxiliary |= cdl;
681 * Mark this command as having a CDL and request the result
682 * task file so that we can inspect the sense data available
685 qc->flags |= ATA_QCFLAG_HAS_CDL | ATA_QCFLAG_RESULT_TF;
689 * ata_build_rw_tf - Build ATA taskfile for given read/write request
690 * @qc: Metadata associated with the taskfile to build
691 * @block: Block address
692 * @n_block: Number of blocks
693 * @tf_flags: RW/FUA etc...
694 * @cdl: Command duration limit index
695 * @class: IO priority class
700 * Build ATA taskfile for the command @qc for read/write request described
701 * by @block, @n_block, @tf_flags and @class.
705 * 0 on success, -ERANGE if the request is too large for @dev,
706 * -EINVAL if the request is invalid.
708 int ata_build_rw_tf(struct ata_queued_cmd *qc, u64 block, u32 n_block,
709 unsigned int tf_flags, int cdl, int class)
711 struct ata_taskfile *tf = &qc->tf;
712 struct ata_device *dev = qc->dev;
714 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
715 tf->flags |= tf_flags;
717 if (ata_ncq_enabled(dev)) {
719 if (!lba_48_ok(block, n_block))
722 tf->protocol = ATA_PROT_NCQ;
723 tf->flags |= ATA_TFLAG_LBA | ATA_TFLAG_LBA48;
725 if (tf->flags & ATA_TFLAG_WRITE)
726 tf->command = ATA_CMD_FPDMA_WRITE;
728 tf->command = ATA_CMD_FPDMA_READ;
730 tf->nsect = qc->hw_tag << 3;
731 tf->hob_feature = (n_block >> 8) & 0xff;
732 tf->feature = n_block & 0xff;
734 tf->hob_lbah = (block >> 40) & 0xff;
735 tf->hob_lbam = (block >> 32) & 0xff;
736 tf->hob_lbal = (block >> 24) & 0xff;
737 tf->lbah = (block >> 16) & 0xff;
738 tf->lbam = (block >> 8) & 0xff;
739 tf->lbal = block & 0xff;
741 tf->device = ATA_LBA;
742 if (tf->flags & ATA_TFLAG_FUA)
743 tf->device |= 1 << 7;
745 if (dev->flags & ATA_DFLAG_NCQ_PRIO_ENABLED &&
746 class == IOPRIO_CLASS_RT)
747 tf->hob_nsect |= ATA_PRIO_HIGH << ATA_SHIFT_PRIO;
749 if ((dev->flags & ATA_DFLAG_CDL_ENABLED) && cdl)
750 ata_set_tf_cdl(qc, cdl);
752 } else if (dev->flags & ATA_DFLAG_LBA) {
753 tf->flags |= ATA_TFLAG_LBA;
755 if ((dev->flags & ATA_DFLAG_CDL_ENABLED) && cdl)
756 ata_set_tf_cdl(qc, cdl);
758 /* Both FUA writes and a CDL index require 48-bit commands */
759 if (!(tf->flags & ATA_TFLAG_FUA) &&
760 !(qc->flags & ATA_QCFLAG_HAS_CDL) &&
761 lba_28_ok(block, n_block)) {
763 tf->device |= (block >> 24) & 0xf;
764 } else if (lba_48_ok(block, n_block)) {
765 if (!(dev->flags & ATA_DFLAG_LBA48))
769 tf->flags |= ATA_TFLAG_LBA48;
771 tf->hob_nsect = (n_block >> 8) & 0xff;
773 tf->hob_lbah = (block >> 40) & 0xff;
774 tf->hob_lbam = (block >> 32) & 0xff;
775 tf->hob_lbal = (block >> 24) & 0xff;
777 /* request too large even for LBA48 */
781 if (unlikely(!ata_set_rwcmd_protocol(dev, tf)))
784 tf->nsect = n_block & 0xff;
786 tf->lbah = (block >> 16) & 0xff;
787 tf->lbam = (block >> 8) & 0xff;
788 tf->lbal = block & 0xff;
790 tf->device |= ATA_LBA;
793 u32 sect, head, cyl, track;
795 /* The request -may- be too large for CHS addressing. */
796 if (!lba_28_ok(block, n_block))
799 if (unlikely(!ata_set_rwcmd_protocol(dev, tf)))
802 /* Convert LBA to CHS */
803 track = (u32)block / dev->sectors;
804 cyl = track / dev->heads;
805 head = track % dev->heads;
806 sect = (u32)block % dev->sectors + 1;
808 /* Check whether the converted CHS can fit.
812 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
815 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
826 * ata_pack_xfermask - Pack pio, mwdma and udma masks into xfer_mask
827 * @pio_mask: pio_mask
828 * @mwdma_mask: mwdma_mask
829 * @udma_mask: udma_mask
831 * Pack @pio_mask, @mwdma_mask and @udma_mask into a single
832 * unsigned int xfer_mask.
840 unsigned int ata_pack_xfermask(unsigned int pio_mask,
841 unsigned int mwdma_mask,
842 unsigned int udma_mask)
844 return ((pio_mask << ATA_SHIFT_PIO) & ATA_MASK_PIO) |
845 ((mwdma_mask << ATA_SHIFT_MWDMA) & ATA_MASK_MWDMA) |
846 ((udma_mask << ATA_SHIFT_UDMA) & ATA_MASK_UDMA);
848 EXPORT_SYMBOL_GPL(ata_pack_xfermask);
851 * ata_unpack_xfermask - Unpack xfer_mask into pio, mwdma and udma masks
852 * @xfer_mask: xfer_mask to unpack
853 * @pio_mask: resulting pio_mask
854 * @mwdma_mask: resulting mwdma_mask
855 * @udma_mask: resulting udma_mask
857 * Unpack @xfer_mask into @pio_mask, @mwdma_mask and @udma_mask.
858 * Any NULL destination masks will be ignored.
860 void ata_unpack_xfermask(unsigned int xfer_mask, unsigned int *pio_mask,
861 unsigned int *mwdma_mask, unsigned int *udma_mask)
864 *pio_mask = (xfer_mask & ATA_MASK_PIO) >> ATA_SHIFT_PIO;
866 *mwdma_mask = (xfer_mask & ATA_MASK_MWDMA) >> ATA_SHIFT_MWDMA;
868 *udma_mask = (xfer_mask & ATA_MASK_UDMA) >> ATA_SHIFT_UDMA;
871 static const struct ata_xfer_ent {
875 { ATA_SHIFT_PIO, ATA_NR_PIO_MODES, XFER_PIO_0 },
876 { ATA_SHIFT_MWDMA, ATA_NR_MWDMA_MODES, XFER_MW_DMA_0 },
877 { ATA_SHIFT_UDMA, ATA_NR_UDMA_MODES, XFER_UDMA_0 },
882 * ata_xfer_mask2mode - Find matching XFER_* for the given xfer_mask
883 * @xfer_mask: xfer_mask of interest
885 * Return matching XFER_* value for @xfer_mask. Only the highest
886 * bit of @xfer_mask is considered.
892 * Matching XFER_* value, 0xff if no match found.
894 u8 ata_xfer_mask2mode(unsigned int xfer_mask)
896 int highbit = fls(xfer_mask) - 1;
897 const struct ata_xfer_ent *ent;
899 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
900 if (highbit >= ent->shift && highbit < ent->shift + ent->bits)
901 return ent->base + highbit - ent->shift;
904 EXPORT_SYMBOL_GPL(ata_xfer_mask2mode);
907 * ata_xfer_mode2mask - Find matching xfer_mask for XFER_*
908 * @xfer_mode: XFER_* of interest
910 * Return matching xfer_mask for @xfer_mode.
916 * Matching xfer_mask, 0 if no match found.
918 unsigned int ata_xfer_mode2mask(u8 xfer_mode)
920 const struct ata_xfer_ent *ent;
922 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
923 if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits)
924 return ((2 << (ent->shift + xfer_mode - ent->base)) - 1)
925 & ~((1 << ent->shift) - 1);
928 EXPORT_SYMBOL_GPL(ata_xfer_mode2mask);
931 * ata_xfer_mode2shift - Find matching xfer_shift for XFER_*
932 * @xfer_mode: XFER_* of interest
934 * Return matching xfer_shift for @xfer_mode.
940 * Matching xfer_shift, -1 if no match found.
942 int ata_xfer_mode2shift(u8 xfer_mode)
944 const struct ata_xfer_ent *ent;
946 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
947 if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits)
951 EXPORT_SYMBOL_GPL(ata_xfer_mode2shift);
954 * ata_mode_string - convert xfer_mask to string
955 * @xfer_mask: mask of bits supported; only highest bit counts.
957 * Determine string which represents the highest speed
958 * (highest bit in @modemask).
964 * Constant C string representing highest speed listed in
965 * @mode_mask, or the constant C string "<n/a>".
967 const char *ata_mode_string(unsigned int xfer_mask)
969 static const char * const xfer_mode_str[] = {
993 highbit = fls(xfer_mask) - 1;
994 if (highbit >= 0 && highbit < ARRAY_SIZE(xfer_mode_str))
995 return xfer_mode_str[highbit];
998 EXPORT_SYMBOL_GPL(ata_mode_string);
1000 const char *sata_spd_string(unsigned int spd)
1002 static const char * const spd_str[] = {
1008 if (spd == 0 || (spd - 1) >= ARRAY_SIZE(spd_str))
1010 return spd_str[spd - 1];
1014 * ata_dev_classify - determine device type based on ATA-spec signature
1015 * @tf: ATA taskfile register set for device to be identified
1017 * Determine from taskfile register contents whether a device is
1018 * ATA or ATAPI, as per "Signature and persistence" section
1019 * of ATA/PI spec (volume 1, sect 5.14).
1025 * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, %ATA_DEV_PMP,
1026 * %ATA_DEV_ZAC, or %ATA_DEV_UNKNOWN the event of failure.
1028 unsigned int ata_dev_classify(const struct ata_taskfile *tf)
1030 /* Apple's open source Darwin code hints that some devices only
1031 * put a proper signature into the LBA mid/high registers,
1032 * So, we only check those. It's sufficient for uniqueness.
1034 * ATA/ATAPI-7 (d1532v1r1: Feb. 19, 2003) specified separate
1035 * signatures for ATA and ATAPI devices attached on SerialATA,
1036 * 0x3c/0xc3 and 0x69/0x96 respectively. However, SerialATA
1037 * spec has never mentioned about using different signatures
1038 * for ATA/ATAPI devices. Then, Serial ATA II: Port
1039 * Multiplier specification began to use 0x69/0x96 to identify
1040 * port multpliers and 0x3c/0xc3 to identify SEMB device.
1041 * ATA/ATAPI-7 dropped descriptions about 0x3c/0xc3 and
1042 * 0x69/0x96 shortly and described them as reserved for
1045 * We follow the current spec and consider that 0x69/0x96
1046 * identifies a port multiplier and 0x3c/0xc3 a SEMB device.
1047 * Unfortunately, WDC WD1600JS-62MHB5 (a hard drive) reports
1048 * SEMB signature. This is worked around in
1049 * ata_dev_read_id().
1051 if (tf->lbam == 0 && tf->lbah == 0)
1054 if (tf->lbam == 0x14 && tf->lbah == 0xeb)
1055 return ATA_DEV_ATAPI;
1057 if (tf->lbam == 0x69 && tf->lbah == 0x96)
1060 if (tf->lbam == 0x3c && tf->lbah == 0xc3)
1061 return ATA_DEV_SEMB;
1063 if (tf->lbam == 0xcd && tf->lbah == 0xab)
1066 return ATA_DEV_UNKNOWN;
1068 EXPORT_SYMBOL_GPL(ata_dev_classify);
1071 * ata_id_string - Convert IDENTIFY DEVICE page into string
1072 * @id: IDENTIFY DEVICE results we will examine
1073 * @s: string into which data is output
1074 * @ofs: offset into identify device page
1075 * @len: length of string to return. must be an even number.
1077 * The strings in the IDENTIFY DEVICE page are broken up into
1078 * 16-bit chunks. Run through the string, and output each
1079 * 8-bit chunk linearly, regardless of platform.
1085 void ata_id_string(const u16 *id, unsigned char *s,
1086 unsigned int ofs, unsigned int len)
1105 EXPORT_SYMBOL_GPL(ata_id_string);
1108 * ata_id_c_string - Convert IDENTIFY DEVICE page into C string
1109 * @id: IDENTIFY DEVICE results we will examine
1110 * @s: string into which data is output
1111 * @ofs: offset into identify device page
1112 * @len: length of string to return. must be an odd number.
1114 * This function is identical to ata_id_string except that it
1115 * trims trailing spaces and terminates the resulting string with
1116 * null. @len must be actual maximum length (even number) + 1.
1121 void ata_id_c_string(const u16 *id, unsigned char *s,
1122 unsigned int ofs, unsigned int len)
1126 ata_id_string(id, s, ofs, len - 1);
1128 p = s + strnlen(s, len - 1);
1129 while (p > s && p[-1] == ' ')
1133 EXPORT_SYMBOL_GPL(ata_id_c_string);
1135 static u64 ata_id_n_sectors(const u16 *id)
1137 if (ata_id_has_lba(id)) {
1138 if (ata_id_has_lba48(id))
1139 return ata_id_u64(id, ATA_ID_LBA_CAPACITY_2);
1141 return ata_id_u32(id, ATA_ID_LBA_CAPACITY);
1144 if (ata_id_current_chs_valid(id))
1145 return (u32)id[ATA_ID_CUR_CYLS] * (u32)id[ATA_ID_CUR_HEADS] *
1146 (u32)id[ATA_ID_CUR_SECTORS];
1148 return (u32)id[ATA_ID_CYLS] * (u32)id[ATA_ID_HEADS] *
1149 (u32)id[ATA_ID_SECTORS];
1152 u64 ata_tf_to_lba48(const struct ata_taskfile *tf)
1156 sectors |= ((u64)(tf->hob_lbah & 0xff)) << 40;
1157 sectors |= ((u64)(tf->hob_lbam & 0xff)) << 32;
1158 sectors |= ((u64)(tf->hob_lbal & 0xff)) << 24;
1159 sectors |= (tf->lbah & 0xff) << 16;
1160 sectors |= (tf->lbam & 0xff) << 8;
1161 sectors |= (tf->lbal & 0xff);
1166 u64 ata_tf_to_lba(const struct ata_taskfile *tf)
1170 sectors |= (tf->device & 0x0f) << 24;
1171 sectors |= (tf->lbah & 0xff) << 16;
1172 sectors |= (tf->lbam & 0xff) << 8;
1173 sectors |= (tf->lbal & 0xff);
1179 * ata_read_native_max_address - Read native max address
1180 * @dev: target device
1181 * @max_sectors: out parameter for the result native max address
1183 * Perform an LBA48 or LBA28 native size query upon the device in
1187 * 0 on success, -EACCES if command is aborted by the drive.
1188 * -EIO on other errors.
1190 static int ata_read_native_max_address(struct ata_device *dev, u64 *max_sectors)
1192 unsigned int err_mask;
1193 struct ata_taskfile tf;
1194 int lba48 = ata_id_has_lba48(dev->id);
1196 ata_tf_init(dev, &tf);
1198 /* always clear all address registers */
1199 tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
1202 tf.command = ATA_CMD_READ_NATIVE_MAX_EXT;
1203 tf.flags |= ATA_TFLAG_LBA48;
1205 tf.command = ATA_CMD_READ_NATIVE_MAX;
1207 tf.protocol = ATA_PROT_NODATA;
1208 tf.device |= ATA_LBA;
1210 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
1213 "failed to read native max address (err_mask=0x%x)\n",
1215 if (err_mask == AC_ERR_DEV && (tf.error & ATA_ABORTED))
1221 *max_sectors = ata_tf_to_lba48(&tf) + 1;
1223 *max_sectors = ata_tf_to_lba(&tf) + 1;
1224 if (dev->horkage & ATA_HORKAGE_HPA_SIZE)
1230 * ata_set_max_sectors - Set max sectors
1231 * @dev: target device
1232 * @new_sectors: new max sectors value to set for the device
1234 * Set max sectors of @dev to @new_sectors.
1237 * 0 on success, -EACCES if command is aborted or denied (due to
1238 * previous non-volatile SET_MAX) by the drive. -EIO on other
1241 static int ata_set_max_sectors(struct ata_device *dev, u64 new_sectors)
1243 unsigned int err_mask;
1244 struct ata_taskfile tf;
1245 int lba48 = ata_id_has_lba48(dev->id);
1249 ata_tf_init(dev, &tf);
1251 tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
1254 tf.command = ATA_CMD_SET_MAX_EXT;
1255 tf.flags |= ATA_TFLAG_LBA48;
1257 tf.hob_lbal = (new_sectors >> 24) & 0xff;
1258 tf.hob_lbam = (new_sectors >> 32) & 0xff;
1259 tf.hob_lbah = (new_sectors >> 40) & 0xff;
1261 tf.command = ATA_CMD_SET_MAX;
1263 tf.device |= (new_sectors >> 24) & 0xf;
1266 tf.protocol = ATA_PROT_NODATA;
1267 tf.device |= ATA_LBA;
1269 tf.lbal = (new_sectors >> 0) & 0xff;
1270 tf.lbam = (new_sectors >> 8) & 0xff;
1271 tf.lbah = (new_sectors >> 16) & 0xff;
1273 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
1276 "failed to set max address (err_mask=0x%x)\n",
1278 if (err_mask == AC_ERR_DEV &&
1279 (tf.error & (ATA_ABORTED | ATA_IDNF)))
1288 * ata_hpa_resize - Resize a device with an HPA set
1289 * @dev: Device to resize
1291 * Read the size of an LBA28 or LBA48 disk with HPA features and resize
1292 * it if required to the full size of the media. The caller must check
1293 * the drive has the HPA feature set enabled.
1296 * 0 on success, -errno on failure.
1298 static int ata_hpa_resize(struct ata_device *dev)
1300 bool print_info = ata_dev_print_info(dev);
1301 bool unlock_hpa = ata_ignore_hpa || dev->flags & ATA_DFLAG_UNLOCK_HPA;
1302 u64 sectors = ata_id_n_sectors(dev->id);
1306 /* do we need to do it? */
1307 if ((dev->class != ATA_DEV_ATA && dev->class != ATA_DEV_ZAC) ||
1308 !ata_id_has_lba(dev->id) || !ata_id_hpa_enabled(dev->id) ||
1309 (dev->horkage & ATA_HORKAGE_BROKEN_HPA))
1312 /* read native max address */
1313 rc = ata_read_native_max_address(dev, &native_sectors);
1315 /* If device aborted the command or HPA isn't going to
1316 * be unlocked, skip HPA resizing.
1318 if (rc == -EACCES || !unlock_hpa) {
1320 "HPA support seems broken, skipping HPA handling\n");
1321 dev->horkage |= ATA_HORKAGE_BROKEN_HPA;
1323 /* we can continue if device aborted the command */
1330 dev->n_native_sectors = native_sectors;
1332 /* nothing to do? */
1333 if (native_sectors <= sectors || !unlock_hpa) {
1334 if (!print_info || native_sectors == sectors)
1337 if (native_sectors > sectors)
1339 "HPA detected: current %llu, native %llu\n",
1340 (unsigned long long)sectors,
1341 (unsigned long long)native_sectors);
1342 else if (native_sectors < sectors)
1344 "native sectors (%llu) is smaller than sectors (%llu)\n",
1345 (unsigned long long)native_sectors,
1346 (unsigned long long)sectors);
1350 /* let's unlock HPA */
1351 rc = ata_set_max_sectors(dev, native_sectors);
1352 if (rc == -EACCES) {
1353 /* if device aborted the command, skip HPA resizing */
1355 "device aborted resize (%llu -> %llu), skipping HPA handling\n",
1356 (unsigned long long)sectors,
1357 (unsigned long long)native_sectors);
1358 dev->horkage |= ATA_HORKAGE_BROKEN_HPA;
1363 /* re-read IDENTIFY data */
1364 rc = ata_dev_reread_id(dev, 0);
1367 "failed to re-read IDENTIFY data after HPA resizing\n");
1372 u64 new_sectors = ata_id_n_sectors(dev->id);
1374 "HPA unlocked: %llu -> %llu, native %llu\n",
1375 (unsigned long long)sectors,
1376 (unsigned long long)new_sectors,
1377 (unsigned long long)native_sectors);
1384 * ata_dump_id - IDENTIFY DEVICE info debugging output
1385 * @dev: device from which the information is fetched
1386 * @id: IDENTIFY DEVICE page to dump
1388 * Dump selected 16-bit words from the given IDENTIFY DEVICE
1395 static inline void ata_dump_id(struct ata_device *dev, const u16 *id)
1398 "49==0x%04x 53==0x%04x 63==0x%04x 64==0x%04x 75==0x%04x\n"
1399 "80==0x%04x 81==0x%04x 82==0x%04x 83==0x%04x 84==0x%04x\n"
1400 "88==0x%04x 93==0x%04x\n",
1401 id[49], id[53], id[63], id[64], id[75], id[80],
1402 id[81], id[82], id[83], id[84], id[88], id[93]);
1406 * ata_id_xfermask - Compute xfermask from the given IDENTIFY data
1407 * @id: IDENTIFY data to compute xfer mask from
1409 * Compute the xfermask for this device. This is not as trivial
1410 * as it seems if we must consider early devices correctly.
1412 * FIXME: pre IDE drive timing (do we care ?).
1420 unsigned int ata_id_xfermask(const u16 *id)
1422 unsigned int pio_mask, mwdma_mask, udma_mask;
1424 /* Usual case. Word 53 indicates word 64 is valid */
1425 if (id[ATA_ID_FIELD_VALID] & (1 << 1)) {
1426 pio_mask = id[ATA_ID_PIO_MODES] & 0x03;
1430 /* If word 64 isn't valid then Word 51 high byte holds
1431 * the PIO timing number for the maximum. Turn it into
1434 u8 mode = (id[ATA_ID_OLD_PIO_MODES] >> 8) & 0xFF;
1435 if (mode < 5) /* Valid PIO range */
1436 pio_mask = (2 << mode) - 1;
1440 /* But wait.. there's more. Design your standards by
1441 * committee and you too can get a free iordy field to
1442 * process. However it is the speeds not the modes that
1443 * are supported... Note drivers using the timing API
1444 * will get this right anyway
1448 mwdma_mask = id[ATA_ID_MWDMA_MODES] & 0x07;
1450 if (ata_id_is_cfa(id)) {
1452 * Process compact flash extended modes
1454 int pio = (id[ATA_ID_CFA_MODES] >> 0) & 0x7;
1455 int dma = (id[ATA_ID_CFA_MODES] >> 3) & 0x7;
1458 pio_mask |= (1 << 5);
1460 pio_mask |= (1 << 6);
1462 mwdma_mask |= (1 << 3);
1464 mwdma_mask |= (1 << 4);
1468 if (id[ATA_ID_FIELD_VALID] & (1 << 2))
1469 udma_mask = id[ATA_ID_UDMA_MODES] & 0xff;
1471 return ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask);
1473 EXPORT_SYMBOL_GPL(ata_id_xfermask);
1475 static void ata_qc_complete_internal(struct ata_queued_cmd *qc)
1477 struct completion *waiting = qc->private_data;
1483 * ata_exec_internal_sg - execute libata internal command
1484 * @dev: Device to which the command is sent
1485 * @tf: Taskfile registers for the command and the result
1486 * @cdb: CDB for packet command
1487 * @dma_dir: Data transfer direction of the command
1488 * @sgl: sg list for the data buffer of the command
1489 * @n_elem: Number of sg entries
1490 * @timeout: Timeout in msecs (0 for default)
1492 * Executes libata internal command with timeout. @tf contains
1493 * command on entry and result on return. Timeout and error
1494 * conditions are reported via return value. No recovery action
1495 * is taken after a command times out. It's caller's duty to
1496 * clean up after timeout.
1499 * None. Should be called with kernel context, might sleep.
1502 * Zero on success, AC_ERR_* mask on failure
1504 static unsigned ata_exec_internal_sg(struct ata_device *dev,
1505 struct ata_taskfile *tf, const u8 *cdb,
1506 int dma_dir, struct scatterlist *sgl,
1507 unsigned int n_elem, unsigned int timeout)
1509 struct ata_link *link = dev->link;
1510 struct ata_port *ap = link->ap;
1511 u8 command = tf->command;
1512 int auto_timeout = 0;
1513 struct ata_queued_cmd *qc;
1514 unsigned int preempted_tag;
1515 u32 preempted_sactive;
1516 u64 preempted_qc_active;
1517 int preempted_nr_active_links;
1518 DECLARE_COMPLETION_ONSTACK(wait);
1519 unsigned long flags;
1520 unsigned int err_mask;
1523 spin_lock_irqsave(ap->lock, flags);
1525 /* no internal command while frozen */
1526 if (ata_port_is_frozen(ap)) {
1527 spin_unlock_irqrestore(ap->lock, flags);
1528 return AC_ERR_SYSTEM;
1531 /* initialize internal qc */
1532 qc = __ata_qc_from_tag(ap, ATA_TAG_INTERNAL);
1534 qc->tag = ATA_TAG_INTERNAL;
1541 preempted_tag = link->active_tag;
1542 preempted_sactive = link->sactive;
1543 preempted_qc_active = ap->qc_active;
1544 preempted_nr_active_links = ap->nr_active_links;
1545 link->active_tag = ATA_TAG_POISON;
1548 ap->nr_active_links = 0;
1550 /* prepare & issue qc */
1553 memcpy(qc->cdb, cdb, ATAPI_CDB_LEN);
1555 /* some SATA bridges need us to indicate data xfer direction */
1556 if (tf->protocol == ATAPI_PROT_DMA && (dev->flags & ATA_DFLAG_DMADIR) &&
1557 dma_dir == DMA_FROM_DEVICE)
1558 qc->tf.feature |= ATAPI_DMADIR;
1560 qc->flags |= ATA_QCFLAG_RESULT_TF;
1561 qc->dma_dir = dma_dir;
1562 if (dma_dir != DMA_NONE) {
1563 unsigned int i, buflen = 0;
1564 struct scatterlist *sg;
1566 for_each_sg(sgl, sg, n_elem, i)
1567 buflen += sg->length;
1569 ata_sg_init(qc, sgl, n_elem);
1570 qc->nbytes = buflen;
1573 qc->private_data = &wait;
1574 qc->complete_fn = ata_qc_complete_internal;
1578 spin_unlock_irqrestore(ap->lock, flags);
1581 if (ata_probe_timeout)
1582 timeout = ata_probe_timeout * 1000;
1584 timeout = ata_internal_cmd_timeout(dev, command);
1589 if (ap->ops->error_handler)
1592 rc = wait_for_completion_timeout(&wait, msecs_to_jiffies(timeout));
1594 if (ap->ops->error_handler)
1597 ata_sff_flush_pio_task(ap);
1600 spin_lock_irqsave(ap->lock, flags);
1602 /* We're racing with irq here. If we lose, the
1603 * following test prevents us from completing the qc
1604 * twice. If we win, the port is frozen and will be
1605 * cleaned up by ->post_internal_cmd().
1607 if (qc->flags & ATA_QCFLAG_ACTIVE) {
1608 qc->err_mask |= AC_ERR_TIMEOUT;
1610 if (ap->ops->error_handler)
1611 ata_port_freeze(ap);
1613 ata_qc_complete(qc);
1615 ata_dev_warn(dev, "qc timeout after %u msecs (cmd 0x%x)\n",
1619 spin_unlock_irqrestore(ap->lock, flags);
1622 /* do post_internal_cmd */
1623 if (ap->ops->post_internal_cmd)
1624 ap->ops->post_internal_cmd(qc);
1626 /* perform minimal error analysis */
1627 if (qc->flags & ATA_QCFLAG_EH) {
1628 if (qc->result_tf.status & (ATA_ERR | ATA_DF))
1629 qc->err_mask |= AC_ERR_DEV;
1632 qc->err_mask |= AC_ERR_OTHER;
1634 if (qc->err_mask & ~AC_ERR_OTHER)
1635 qc->err_mask &= ~AC_ERR_OTHER;
1636 } else if (qc->tf.command == ATA_CMD_REQ_SENSE_DATA) {
1637 qc->result_tf.status |= ATA_SENSE;
1641 spin_lock_irqsave(ap->lock, flags);
1643 *tf = qc->result_tf;
1644 err_mask = qc->err_mask;
1647 link->active_tag = preempted_tag;
1648 link->sactive = preempted_sactive;
1649 ap->qc_active = preempted_qc_active;
1650 ap->nr_active_links = preempted_nr_active_links;
1652 spin_unlock_irqrestore(ap->lock, flags);
1654 if ((err_mask & AC_ERR_TIMEOUT) && auto_timeout)
1655 ata_internal_cmd_timed_out(dev, command);
1661 * ata_exec_internal - execute libata internal command
1662 * @dev: Device to which the command is sent
1663 * @tf: Taskfile registers for the command and the result
1664 * @cdb: CDB for packet command
1665 * @dma_dir: Data transfer direction of the command
1666 * @buf: Data buffer of the command
1667 * @buflen: Length of data buffer
1668 * @timeout: Timeout in msecs (0 for default)
1670 * Wrapper around ata_exec_internal_sg() which takes simple
1671 * buffer instead of sg list.
1674 * None. Should be called with kernel context, might sleep.
1677 * Zero on success, AC_ERR_* mask on failure
1679 unsigned ata_exec_internal(struct ata_device *dev,
1680 struct ata_taskfile *tf, const u8 *cdb,
1681 int dma_dir, void *buf, unsigned int buflen,
1682 unsigned int timeout)
1684 struct scatterlist *psg = NULL, sg;
1685 unsigned int n_elem = 0;
1687 if (dma_dir != DMA_NONE) {
1689 sg_init_one(&sg, buf, buflen);
1694 return ata_exec_internal_sg(dev, tf, cdb, dma_dir, psg, n_elem,
1699 * ata_pio_need_iordy - check if iordy needed
1702 * Check if the current speed of the device requires IORDY. Used
1703 * by various controllers for chip configuration.
1705 unsigned int ata_pio_need_iordy(const struct ata_device *adev)
1707 /* Don't set IORDY if we're preparing for reset. IORDY may
1708 * lead to controller lock up on certain controllers if the
1709 * port is not occupied. See bko#11703 for details.
1711 if (adev->link->ap->pflags & ATA_PFLAG_RESETTING)
1713 /* Controller doesn't support IORDY. Probably a pointless
1714 * check as the caller should know this.
1716 if (adev->link->ap->flags & ATA_FLAG_NO_IORDY)
1718 /* CF spec. r4.1 Table 22 says no iordy on PIO5 and PIO6. */
1719 if (ata_id_is_cfa(adev->id)
1720 && (adev->pio_mode == XFER_PIO_5 || adev->pio_mode == XFER_PIO_6))
1722 /* PIO3 and higher it is mandatory */
1723 if (adev->pio_mode > XFER_PIO_2)
1725 /* We turn it on when possible */
1726 if (ata_id_has_iordy(adev->id))
1730 EXPORT_SYMBOL_GPL(ata_pio_need_iordy);
1733 * ata_pio_mask_no_iordy - Return the non IORDY mask
1736 * Compute the highest mode possible if we are not using iordy. Return
1737 * -1 if no iordy mode is available.
1739 static u32 ata_pio_mask_no_iordy(const struct ata_device *adev)
1741 /* If we have no drive specific rule, then PIO 2 is non IORDY */
1742 if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE */
1743 u16 pio = adev->id[ATA_ID_EIDE_PIO];
1744 /* Is the speed faster than the drive allows non IORDY ? */
1746 /* This is cycle times not frequency - watch the logic! */
1747 if (pio > 240) /* PIO2 is 240nS per cycle */
1748 return 3 << ATA_SHIFT_PIO;
1749 return 7 << ATA_SHIFT_PIO;
1752 return 3 << ATA_SHIFT_PIO;
1756 * ata_do_dev_read_id - default ID read method
1758 * @tf: proposed taskfile
1761 * Issue the identify taskfile and hand back the buffer containing
1762 * identify data. For some RAID controllers and for pre ATA devices
1763 * this function is wrapped or replaced by the driver
1765 unsigned int ata_do_dev_read_id(struct ata_device *dev,
1766 struct ata_taskfile *tf, __le16 *id)
1768 return ata_exec_internal(dev, tf, NULL, DMA_FROM_DEVICE,
1769 id, sizeof(id[0]) * ATA_ID_WORDS, 0);
1771 EXPORT_SYMBOL_GPL(ata_do_dev_read_id);
1774 * ata_dev_read_id - Read ID data from the specified device
1775 * @dev: target device
1776 * @p_class: pointer to class of the target device (may be changed)
1777 * @flags: ATA_READID_* flags
1778 * @id: buffer to read IDENTIFY data into
1780 * Read ID data from the specified device. ATA_CMD_ID_ATA is
1781 * performed on ATA devices and ATA_CMD_ID_ATAPI on ATAPI
1782 * devices. This function also issues ATA_CMD_INIT_DEV_PARAMS
1783 * for pre-ATA4 drives.
1785 * FIXME: ATA_CMD_ID_ATA is optional for early drives and right
1786 * now we abort if we hit that case.
1789 * Kernel thread context (may sleep)
1792 * 0 on success, -errno otherwise.
1794 int ata_dev_read_id(struct ata_device *dev, unsigned int *p_class,
1795 unsigned int flags, u16 *id)
1797 struct ata_port *ap = dev->link->ap;
1798 unsigned int class = *p_class;
1799 struct ata_taskfile tf;
1800 unsigned int err_mask = 0;
1802 bool is_semb = class == ATA_DEV_SEMB;
1803 int may_fallback = 1, tried_spinup = 0;
1807 ata_tf_init(dev, &tf);
1811 class = ATA_DEV_ATA; /* some hard drives report SEMB sig */
1815 tf.command = ATA_CMD_ID_ATA;
1818 tf.command = ATA_CMD_ID_ATAPI;
1822 reason = "unsupported class";
1826 tf.protocol = ATA_PROT_PIO;
1828 /* Some devices choke if TF registers contain garbage. Make
1829 * sure those are properly initialized.
1831 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
1833 /* Device presence detection is unreliable on some
1834 * controllers. Always poll IDENTIFY if available.
1836 tf.flags |= ATA_TFLAG_POLLING;
1838 if (ap->ops->read_id)
1839 err_mask = ap->ops->read_id(dev, &tf, (__le16 *)id);
1841 err_mask = ata_do_dev_read_id(dev, &tf, (__le16 *)id);
1844 if (err_mask & AC_ERR_NODEV_HINT) {
1845 ata_dev_dbg(dev, "NODEV after polling detection\n");
1851 "IDENTIFY failed on device w/ SEMB sig, disabled\n");
1852 /* SEMB is not supported yet */
1853 *p_class = ATA_DEV_SEMB_UNSUP;
1857 if ((err_mask == AC_ERR_DEV) && (tf.error & ATA_ABORTED)) {
1858 /* Device or controller might have reported
1859 * the wrong device class. Give a shot at the
1860 * other IDENTIFY if the current one is
1861 * aborted by the device.
1866 if (class == ATA_DEV_ATA)
1867 class = ATA_DEV_ATAPI;
1869 class = ATA_DEV_ATA;
1873 /* Control reaches here iff the device aborted
1874 * both flavors of IDENTIFYs which happens
1875 * sometimes with phantom devices.
1878 "both IDENTIFYs aborted, assuming NODEV\n");
1883 reason = "I/O error";
1887 if (dev->horkage & ATA_HORKAGE_DUMP_ID) {
1888 ata_dev_info(dev, "dumping IDENTIFY data, "
1889 "class=%d may_fallback=%d tried_spinup=%d\n",
1890 class, may_fallback, tried_spinup);
1891 print_hex_dump(KERN_INFO, "", DUMP_PREFIX_OFFSET,
1892 16, 2, id, ATA_ID_WORDS * sizeof(*id), true);
1895 /* Falling back doesn't make sense if ID data was read
1896 * successfully at least once.
1900 swap_buf_le16(id, ATA_ID_WORDS);
1904 reason = "device reports invalid type";
1906 if (class == ATA_DEV_ATA || class == ATA_DEV_ZAC) {
1907 if (!ata_id_is_ata(id) && !ata_id_is_cfa(id))
1909 if (ap->host->flags & ATA_HOST_IGNORE_ATA &&
1910 ata_id_is_ata(id)) {
1912 "host indicates ignore ATA devices, ignored\n");
1916 if (ata_id_is_ata(id))
1920 if (!tried_spinup && (id[2] == 0x37c8 || id[2] == 0x738c)) {
1923 * Drive powered-up in standby mode, and requires a specific
1924 * SET_FEATURES spin-up subcommand before it will accept
1925 * anything other than the original IDENTIFY command.
1927 err_mask = ata_dev_set_feature(dev, SETFEATURES_SPINUP, 0);
1928 if (err_mask && id[2] != 0x738c) {
1930 reason = "SPINUP failed";
1934 * If the drive initially returned incomplete IDENTIFY info,
1935 * we now must reissue the IDENTIFY command.
1937 if (id[2] == 0x37c8)
1941 if ((flags & ATA_READID_POSTRESET) &&
1942 (class == ATA_DEV_ATA || class == ATA_DEV_ZAC)) {
1944 * The exact sequence expected by certain pre-ATA4 drives is:
1946 * IDENTIFY (optional in early ATA)
1947 * INITIALIZE DEVICE PARAMETERS (later IDE and ATA)
1949 * Some drives were very specific about that exact sequence.
1951 * Note that ATA4 says lba is mandatory so the second check
1952 * should never trigger.
1954 if (ata_id_major_version(id) < 4 || !ata_id_has_lba(id)) {
1955 err_mask = ata_dev_init_params(dev, id[3], id[6]);
1958 reason = "INIT_DEV_PARAMS failed";
1962 /* current CHS translation info (id[53-58]) might be
1963 * changed. reread the identify device info.
1965 flags &= ~ATA_READID_POSTRESET;
1975 ata_dev_warn(dev, "failed to IDENTIFY (%s, err_mask=0x%x)\n",
1981 * ata_read_log_page - read a specific log page
1982 * @dev: target device
1984 * @page: page to read
1985 * @buf: buffer to store read page
1986 * @sectors: number of sectors to read
1988 * Read log page using READ_LOG_EXT command.
1991 * Kernel thread context (may sleep).
1994 * 0 on success, AC_ERR_* mask otherwise.
1996 unsigned int ata_read_log_page(struct ata_device *dev, u8 log,
1997 u8 page, void *buf, unsigned int sectors)
1999 unsigned long ap_flags = dev->link->ap->flags;
2000 struct ata_taskfile tf;
2001 unsigned int err_mask;
2004 ata_dev_dbg(dev, "read log page - log 0x%x, page 0x%x\n", log, page);
2007 * Return error without actually issuing the command on controllers
2008 * which e.g. lockup on a read log page.
2010 if (ap_flags & ATA_FLAG_NO_LOG_PAGE)
2014 ata_tf_init(dev, &tf);
2015 if (ata_dma_enabled(dev) && ata_id_has_read_log_dma_ext(dev->id) &&
2016 !(dev->horkage & ATA_HORKAGE_NO_DMA_LOG)) {
2017 tf.command = ATA_CMD_READ_LOG_DMA_EXT;
2018 tf.protocol = ATA_PROT_DMA;
2021 tf.command = ATA_CMD_READ_LOG_EXT;
2022 tf.protocol = ATA_PROT_PIO;
2028 tf.hob_nsect = sectors >> 8;
2029 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_LBA48 | ATA_TFLAG_DEVICE;
2031 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_FROM_DEVICE,
2032 buf, sectors * ATA_SECT_SIZE, 0);
2036 dev->horkage |= ATA_HORKAGE_NO_DMA_LOG;
2037 if (!ata_port_is_frozen(dev->link->ap))
2041 "Read log 0x%02x page 0x%02x failed, Emask 0x%x\n",
2042 (unsigned int)log, (unsigned int)page, err_mask);
2048 static int ata_log_supported(struct ata_device *dev, u8 log)
2050 struct ata_port *ap = dev->link->ap;
2052 if (dev->horkage & ATA_HORKAGE_NO_LOG_DIR)
2055 if (ata_read_log_page(dev, ATA_LOG_DIRECTORY, 0, ap->sector_buf, 1))
2057 return get_unaligned_le16(&ap->sector_buf[log * 2]);
2060 static bool ata_identify_page_supported(struct ata_device *dev, u8 page)
2062 struct ata_port *ap = dev->link->ap;
2063 unsigned int err, i;
2065 if (dev->horkage & ATA_HORKAGE_NO_ID_DEV_LOG)
2068 if (!ata_log_supported(dev, ATA_LOG_IDENTIFY_DEVICE)) {
2070 * IDENTIFY DEVICE data log is defined as mandatory starting
2071 * with ACS-3 (ATA version 10). Warn about the missing log
2072 * for drives which implement this ATA level or above.
2074 if (ata_id_major_version(dev->id) >= 10)
2076 "ATA Identify Device Log not supported\n");
2077 dev->horkage |= ATA_HORKAGE_NO_ID_DEV_LOG;
2082 * Read IDENTIFY DEVICE data log, page 0, to figure out if the page is
2085 err = ata_read_log_page(dev, ATA_LOG_IDENTIFY_DEVICE, 0, ap->sector_buf,
2090 for (i = 0; i < ap->sector_buf[8]; i++) {
2091 if (ap->sector_buf[9 + i] == page)
2098 static int ata_do_link_spd_horkage(struct ata_device *dev)
2100 struct ata_link *plink = ata_dev_phys_link(dev);
2101 u32 target, target_limit;
2103 if (!sata_scr_valid(plink))
2106 if (dev->horkage & ATA_HORKAGE_1_5_GBPS)
2111 target_limit = (1 << target) - 1;
2113 /* if already on stricter limit, no need to push further */
2114 if (plink->sata_spd_limit <= target_limit)
2117 plink->sata_spd_limit = target_limit;
2119 /* Request another EH round by returning -EAGAIN if link is
2120 * going faster than the target speed. Forward progress is
2121 * guaranteed by setting sata_spd_limit to target_limit above.
2123 if (plink->sata_spd > target) {
2124 ata_dev_info(dev, "applying link speed limit horkage to %s\n",
2125 sata_spd_string(target));
2131 static inline u8 ata_dev_knobble(struct ata_device *dev)
2133 struct ata_port *ap = dev->link->ap;
2135 if (ata_dev_blacklisted(dev) & ATA_HORKAGE_BRIDGE_OK)
2138 return ((ap->cbl == ATA_CBL_SATA) && (!ata_id_is_sata(dev->id)));
2141 static void ata_dev_config_ncq_send_recv(struct ata_device *dev)
2143 struct ata_port *ap = dev->link->ap;
2144 unsigned int err_mask;
2146 if (!ata_log_supported(dev, ATA_LOG_NCQ_SEND_RECV)) {
2147 ata_dev_warn(dev, "NCQ Send/Recv Log not supported\n");
2150 err_mask = ata_read_log_page(dev, ATA_LOG_NCQ_SEND_RECV,
2151 0, ap->sector_buf, 1);
2153 u8 *cmds = dev->ncq_send_recv_cmds;
2155 dev->flags |= ATA_DFLAG_NCQ_SEND_RECV;
2156 memcpy(cmds, ap->sector_buf, ATA_LOG_NCQ_SEND_RECV_SIZE);
2158 if (dev->horkage & ATA_HORKAGE_NO_NCQ_TRIM) {
2159 ata_dev_dbg(dev, "disabling queued TRIM support\n");
2160 cmds[ATA_LOG_NCQ_SEND_RECV_DSM_OFFSET] &=
2161 ~ATA_LOG_NCQ_SEND_RECV_DSM_TRIM;
2166 static void ata_dev_config_ncq_non_data(struct ata_device *dev)
2168 struct ata_port *ap = dev->link->ap;
2169 unsigned int err_mask;
2171 if (!ata_log_supported(dev, ATA_LOG_NCQ_NON_DATA)) {
2173 "NCQ Send/Recv Log not supported\n");
2176 err_mask = ata_read_log_page(dev, ATA_LOG_NCQ_NON_DATA,
2177 0, ap->sector_buf, 1);
2179 u8 *cmds = dev->ncq_non_data_cmds;
2181 memcpy(cmds, ap->sector_buf, ATA_LOG_NCQ_NON_DATA_SIZE);
2185 static void ata_dev_config_ncq_prio(struct ata_device *dev)
2187 struct ata_port *ap = dev->link->ap;
2188 unsigned int err_mask;
2190 if (!ata_identify_page_supported(dev, ATA_LOG_SATA_SETTINGS))
2193 err_mask = ata_read_log_page(dev,
2194 ATA_LOG_IDENTIFY_DEVICE,
2195 ATA_LOG_SATA_SETTINGS,
2201 if (!(ap->sector_buf[ATA_LOG_NCQ_PRIO_OFFSET] & BIT(3)))
2204 dev->flags |= ATA_DFLAG_NCQ_PRIO;
2209 dev->flags &= ~ATA_DFLAG_NCQ_PRIO_ENABLED;
2210 dev->flags &= ~ATA_DFLAG_NCQ_PRIO;
2213 static bool ata_dev_check_adapter(struct ata_device *dev,
2214 unsigned short vendor_id)
2216 struct pci_dev *pcidev = NULL;
2217 struct device *parent_dev = NULL;
2219 for (parent_dev = dev->tdev.parent; parent_dev != NULL;
2220 parent_dev = parent_dev->parent) {
2221 if (dev_is_pci(parent_dev)) {
2222 pcidev = to_pci_dev(parent_dev);
2223 if (pcidev->vendor == vendor_id)
2232 static int ata_dev_config_ncq(struct ata_device *dev,
2233 char *desc, size_t desc_sz)
2235 struct ata_port *ap = dev->link->ap;
2236 int hdepth = 0, ddepth = ata_id_queue_depth(dev->id);
2237 unsigned int err_mask;
2240 if (!ata_id_has_ncq(dev->id)) {
2244 if (!IS_ENABLED(CONFIG_SATA_HOST))
2246 if (dev->horkage & ATA_HORKAGE_NONCQ) {
2247 snprintf(desc, desc_sz, "NCQ (not used)");
2251 if (dev->horkage & ATA_HORKAGE_NO_NCQ_ON_ATI &&
2252 ata_dev_check_adapter(dev, PCI_VENDOR_ID_ATI)) {
2253 snprintf(desc, desc_sz, "NCQ (not used)");
2257 if (ap->flags & ATA_FLAG_NCQ) {
2258 hdepth = min(ap->scsi_host->can_queue, ATA_MAX_QUEUE);
2259 dev->flags |= ATA_DFLAG_NCQ;
2262 if (!(dev->horkage & ATA_HORKAGE_BROKEN_FPDMA_AA) &&
2263 (ap->flags & ATA_FLAG_FPDMA_AA) &&
2264 ata_id_has_fpdma_aa(dev->id)) {
2265 err_mask = ata_dev_set_feature(dev, SETFEATURES_SATA_ENABLE,
2269 "failed to enable AA (error_mask=0x%x)\n",
2271 if (err_mask != AC_ERR_DEV) {
2272 dev->horkage |= ATA_HORKAGE_BROKEN_FPDMA_AA;
2279 if (hdepth >= ddepth)
2280 snprintf(desc, desc_sz, "NCQ (depth %d)%s", ddepth, aa_desc);
2282 snprintf(desc, desc_sz, "NCQ (depth %d/%d)%s", hdepth,
2285 if ((ap->flags & ATA_FLAG_FPDMA_AUX)) {
2286 if (ata_id_has_ncq_send_and_recv(dev->id))
2287 ata_dev_config_ncq_send_recv(dev);
2288 if (ata_id_has_ncq_non_data(dev->id))
2289 ata_dev_config_ncq_non_data(dev);
2290 if (ata_id_has_ncq_prio(dev->id))
2291 ata_dev_config_ncq_prio(dev);
2297 static void ata_dev_config_sense_reporting(struct ata_device *dev)
2299 unsigned int err_mask;
2301 if (!ata_id_has_sense_reporting(dev->id))
2304 if (ata_id_sense_reporting_enabled(dev->id))
2307 err_mask = ata_dev_set_feature(dev, SETFEATURE_SENSE_DATA, 0x1);
2310 "failed to enable Sense Data Reporting, Emask 0x%x\n",
2315 static void ata_dev_config_zac(struct ata_device *dev)
2317 struct ata_port *ap = dev->link->ap;
2318 unsigned int err_mask;
2319 u8 *identify_buf = ap->sector_buf;
2321 dev->zac_zones_optimal_open = U32_MAX;
2322 dev->zac_zones_optimal_nonseq = U32_MAX;
2323 dev->zac_zones_max_open = U32_MAX;
2326 * Always set the 'ZAC' flag for Host-managed devices.
2328 if (dev->class == ATA_DEV_ZAC)
2329 dev->flags |= ATA_DFLAG_ZAC;
2330 else if (ata_id_zoned_cap(dev->id) == 0x01)
2332 * Check for host-aware devices.
2334 dev->flags |= ATA_DFLAG_ZAC;
2336 if (!(dev->flags & ATA_DFLAG_ZAC))
2339 if (!ata_identify_page_supported(dev, ATA_LOG_ZONED_INFORMATION)) {
2341 "ATA Zoned Information Log not supported\n");
2346 * Read IDENTIFY DEVICE data log, page 9 (Zoned-device information)
2348 err_mask = ata_read_log_page(dev, ATA_LOG_IDENTIFY_DEVICE,
2349 ATA_LOG_ZONED_INFORMATION,
2352 u64 zoned_cap, opt_open, opt_nonseq, max_open;
2354 zoned_cap = get_unaligned_le64(&identify_buf[8]);
2355 if ((zoned_cap >> 63))
2356 dev->zac_zoned_cap = (zoned_cap & 1);
2357 opt_open = get_unaligned_le64(&identify_buf[24]);
2358 if ((opt_open >> 63))
2359 dev->zac_zones_optimal_open = (u32)opt_open;
2360 opt_nonseq = get_unaligned_le64(&identify_buf[32]);
2361 if ((opt_nonseq >> 63))
2362 dev->zac_zones_optimal_nonseq = (u32)opt_nonseq;
2363 max_open = get_unaligned_le64(&identify_buf[40]);
2364 if ((max_open >> 63))
2365 dev->zac_zones_max_open = (u32)max_open;
2369 static void ata_dev_config_trusted(struct ata_device *dev)
2371 struct ata_port *ap = dev->link->ap;
2375 if (!ata_id_has_trusted(dev->id))
2378 if (!ata_identify_page_supported(dev, ATA_LOG_SECURITY)) {
2380 "Security Log not supported\n");
2384 err = ata_read_log_page(dev, ATA_LOG_IDENTIFY_DEVICE, ATA_LOG_SECURITY,
2389 trusted_cap = get_unaligned_le64(&ap->sector_buf[40]);
2390 if (!(trusted_cap & (1ULL << 63))) {
2392 "Trusted Computing capability qword not valid!\n");
2396 if (trusted_cap & (1 << 0))
2397 dev->flags |= ATA_DFLAG_TRUSTED;
2400 static void ata_dev_config_cdl(struct ata_device *dev)
2402 struct ata_port *ap = dev->link->ap;
2403 unsigned int err_mask;
2407 if (ata_id_major_version(dev->id) < 12)
2410 if (!ata_log_supported(dev, ATA_LOG_IDENTIFY_DEVICE) ||
2411 !ata_identify_page_supported(dev, ATA_LOG_SUPPORTED_CAPABILITIES) ||
2412 !ata_identify_page_supported(dev, ATA_LOG_CURRENT_SETTINGS))
2415 err_mask = ata_read_log_page(dev, ATA_LOG_IDENTIFY_DEVICE,
2416 ATA_LOG_SUPPORTED_CAPABILITIES,
2421 /* Check Command Duration Limit Supported bits */
2422 val = get_unaligned_le64(&ap->sector_buf[168]);
2423 if (!(val & BIT_ULL(63)) || !(val & BIT_ULL(0)))
2426 /* Warn the user if command duration guideline is not supported */
2427 if (!(val & BIT_ULL(1)))
2429 "Command duration guideline is not supported\n");
2432 * We must have support for the sense data for successful NCQ commands
2433 * log indicated by the successful NCQ command sense data supported bit.
2435 val = get_unaligned_le64(&ap->sector_buf[8]);
2436 if (!(val & BIT_ULL(63)) || !(val & BIT_ULL(47))) {
2438 "CDL supported but Successful NCQ Command Sense Data is not supported\n");
2442 /* Without NCQ autosense, the successful NCQ commands log is useless. */
2443 if (!ata_id_has_ncq_autosense(dev->id)) {
2445 "CDL supported but NCQ autosense is not supported\n");
2450 * If CDL is marked as enabled, make sure the feature is enabled too.
2451 * Conversely, if CDL is disabled, make sure the feature is turned off.
2453 err_mask = ata_read_log_page(dev, ATA_LOG_IDENTIFY_DEVICE,
2454 ATA_LOG_CURRENT_SETTINGS,
2459 val = get_unaligned_le64(&ap->sector_buf[8]);
2460 cdl_enabled = val & BIT_ULL(63) && val & BIT_ULL(21);
2461 if (dev->flags & ATA_DFLAG_CDL_ENABLED) {
2463 /* Enable CDL on the device */
2464 err_mask = ata_dev_set_feature(dev, SETFEATURES_CDL, 1);
2467 "Enable CDL feature failed\n");
2473 /* Disable CDL on the device */
2474 err_mask = ata_dev_set_feature(dev, SETFEATURES_CDL, 0);
2477 "Disable CDL feature failed\n");
2484 * While CDL itself has to be enabled using sysfs, CDL requires that
2485 * sense data for successful NCQ commands is enabled to work properly.
2486 * Just like ata_dev_config_sense_reporting(), enable it unconditionally
2489 if (!(val & BIT_ULL(63)) || !(val & BIT_ULL(18))) {
2490 err_mask = ata_dev_set_feature(dev,
2491 SETFEATURE_SENSE_DATA_SUCC_NCQ, 0x1);
2494 "failed to enable Sense Data for successful NCQ commands, Emask 0x%x\n",
2501 * Allocate a buffer to handle reading the sense data for successful
2502 * NCQ Commands log page for commands using a CDL with one of the limit
2503 * policy set to 0xD (successful completion with sense data available
2506 if (!ap->ncq_sense_buf) {
2507 ap->ncq_sense_buf = kmalloc(ATA_LOG_SENSE_NCQ_SIZE, GFP_KERNEL);
2508 if (!ap->ncq_sense_buf)
2513 * Command duration limits is supported: cache the CDL log page 18h
2514 * (command duration descriptors).
2516 err_mask = ata_read_log_page(dev, ATA_LOG_CDL, 0, ap->sector_buf, 1);
2518 ata_dev_warn(dev, "Read Command Duration Limits log failed\n");
2522 memcpy(dev->cdl, ap->sector_buf, ATA_LOG_CDL_SIZE);
2523 dev->flags |= ATA_DFLAG_CDL;
2528 dev->flags &= ~(ATA_DFLAG_CDL | ATA_DFLAG_CDL_ENABLED);
2529 kfree(ap->ncq_sense_buf);
2530 ap->ncq_sense_buf = NULL;
2533 static int ata_dev_config_lba(struct ata_device *dev)
2535 const u16 *id = dev->id;
2536 const char *lba_desc;
2540 dev->flags |= ATA_DFLAG_LBA;
2542 if (ata_id_has_lba48(id)) {
2544 dev->flags |= ATA_DFLAG_LBA48;
2545 if (dev->n_sectors >= (1UL << 28) &&
2546 ata_id_has_flush_ext(id))
2547 dev->flags |= ATA_DFLAG_FLUSH_EXT;
2553 ret = ata_dev_config_ncq(dev, ncq_desc, sizeof(ncq_desc));
2555 /* print device info to dmesg */
2556 if (ata_dev_print_info(dev))
2558 "%llu sectors, multi %u: %s %s\n",
2559 (unsigned long long)dev->n_sectors,
2560 dev->multi_count, lba_desc, ncq_desc);
2565 static void ata_dev_config_chs(struct ata_device *dev)
2567 const u16 *id = dev->id;
2569 if (ata_id_current_chs_valid(id)) {
2570 /* Current CHS translation is valid. */
2571 dev->cylinders = id[54];
2572 dev->heads = id[55];
2573 dev->sectors = id[56];
2575 /* Default translation */
2576 dev->cylinders = id[1];
2578 dev->sectors = id[6];
2581 /* print device info to dmesg */
2582 if (ata_dev_print_info(dev))
2584 "%llu sectors, multi %u, CHS %u/%u/%u\n",
2585 (unsigned long long)dev->n_sectors,
2586 dev->multi_count, dev->cylinders,
2587 dev->heads, dev->sectors);
2590 static void ata_dev_config_fua(struct ata_device *dev)
2592 /* Ignore FUA support if its use is disabled globally */
2596 /* Ignore devices without support for WRITE DMA FUA EXT */
2597 if (!(dev->flags & ATA_DFLAG_LBA48) || !ata_id_has_fua(dev->id))
2600 /* Ignore known bad devices and devices that lack NCQ support */
2601 if (!ata_ncq_supported(dev) || (dev->horkage & ATA_HORKAGE_NO_FUA))
2604 dev->flags |= ATA_DFLAG_FUA;
2609 dev->flags &= ~ATA_DFLAG_FUA;
2612 static void ata_dev_config_devslp(struct ata_device *dev)
2614 u8 *sata_setting = dev->link->ap->sector_buf;
2615 unsigned int err_mask;
2619 * Check device sleep capability. Get DevSlp timing variables
2620 * from SATA Settings page of Identify Device Data Log.
2622 if (!ata_id_has_devslp(dev->id) ||
2623 !ata_identify_page_supported(dev, ATA_LOG_SATA_SETTINGS))
2626 err_mask = ata_read_log_page(dev,
2627 ATA_LOG_IDENTIFY_DEVICE,
2628 ATA_LOG_SATA_SETTINGS,
2633 dev->flags |= ATA_DFLAG_DEVSLP;
2634 for (i = 0; i < ATA_LOG_DEVSLP_SIZE; i++) {
2635 j = ATA_LOG_DEVSLP_OFFSET + i;
2636 dev->devslp_timing[i] = sata_setting[j];
2640 static void ata_dev_config_cpr(struct ata_device *dev)
2642 unsigned int err_mask;
2645 struct ata_cpr_log *cpr_log = NULL;
2646 u8 *desc, *buf = NULL;
2648 if (ata_id_major_version(dev->id) < 11)
2651 buf_len = ata_log_supported(dev, ATA_LOG_CONCURRENT_POSITIONING_RANGES);
2656 * Read the concurrent positioning ranges log (0x47). We can have at
2657 * most 255 32B range descriptors plus a 64B header. This log varies in
2658 * size, so use the size reported in the GPL directory. Reading beyond
2659 * the supported length will result in an error.
2662 buf = kzalloc(buf_len, GFP_KERNEL);
2666 err_mask = ata_read_log_page(dev, ATA_LOG_CONCURRENT_POSITIONING_RANGES,
2667 0, buf, buf_len >> 9);
2675 cpr_log = kzalloc(struct_size(cpr_log, cpr, nr_cpr), GFP_KERNEL);
2679 cpr_log->nr_cpr = nr_cpr;
2681 for (i = 0; i < nr_cpr; i++, desc += 32) {
2682 cpr_log->cpr[i].num = desc[0];
2683 cpr_log->cpr[i].num_storage_elements = desc[1];
2684 cpr_log->cpr[i].start_lba = get_unaligned_le64(&desc[8]);
2685 cpr_log->cpr[i].num_lbas = get_unaligned_le64(&desc[16]);
2689 swap(dev->cpr_log, cpr_log);
2694 static void ata_dev_print_features(struct ata_device *dev)
2696 if (!(dev->flags & ATA_DFLAG_FEATURES_MASK))
2700 "Features:%s%s%s%s%s%s%s%s\n",
2701 dev->flags & ATA_DFLAG_FUA ? " FUA" : "",
2702 dev->flags & ATA_DFLAG_TRUSTED ? " Trust" : "",
2703 dev->flags & ATA_DFLAG_DA ? " Dev-Attention" : "",
2704 dev->flags & ATA_DFLAG_DEVSLP ? " Dev-Sleep" : "",
2705 dev->flags & ATA_DFLAG_NCQ_SEND_RECV ? " NCQ-sndrcv" : "",
2706 dev->flags & ATA_DFLAG_NCQ_PRIO ? " NCQ-prio" : "",
2707 dev->flags & ATA_DFLAG_CDL ? " CDL" : "",
2708 dev->cpr_log ? " CPR" : "");
2712 * ata_dev_configure - Configure the specified ATA/ATAPI device
2713 * @dev: Target device to configure
2715 * Configure @dev according to @dev->id. Generic and low-level
2716 * driver specific fixups are also applied.
2719 * Kernel thread context (may sleep)
2722 * 0 on success, -errno otherwise
2724 int ata_dev_configure(struct ata_device *dev)
2726 struct ata_port *ap = dev->link->ap;
2727 bool print_info = ata_dev_print_info(dev);
2728 const u16 *id = dev->id;
2729 unsigned int xfer_mask;
2730 unsigned int err_mask;
2731 char revbuf[7]; /* XYZ-99\0 */
2732 char fwrevbuf[ATA_ID_FW_REV_LEN+1];
2733 char modelbuf[ATA_ID_PROD_LEN+1];
2736 if (!ata_dev_enabled(dev)) {
2737 ata_dev_dbg(dev, "no device\n");
2742 dev->horkage |= ata_dev_blacklisted(dev);
2743 ata_force_horkage(dev);
2745 if (dev->horkage & ATA_HORKAGE_DISABLE) {
2746 ata_dev_info(dev, "unsupported device, disabling\n");
2747 ata_dev_disable(dev);
2751 if ((!atapi_enabled || (ap->flags & ATA_FLAG_NO_ATAPI)) &&
2752 dev->class == ATA_DEV_ATAPI) {
2753 ata_dev_warn(dev, "WARNING: ATAPI is %s, device ignored\n",
2754 atapi_enabled ? "not supported with this driver"
2756 ata_dev_disable(dev);
2760 rc = ata_do_link_spd_horkage(dev);
2764 /* some WD SATA-1 drives have issues with LPM, turn on NOLPM for them */
2765 if ((dev->horkage & ATA_HORKAGE_WD_BROKEN_LPM) &&
2766 (id[ATA_ID_SATA_CAPABILITY] & 0xe) == 0x2)
2767 dev->horkage |= ATA_HORKAGE_NOLPM;
2769 if (ap->flags & ATA_FLAG_NO_LPM)
2770 dev->horkage |= ATA_HORKAGE_NOLPM;
2772 if (dev->horkage & ATA_HORKAGE_NOLPM) {
2773 ata_dev_warn(dev, "LPM support broken, forcing max_power\n");
2774 dev->link->ap->target_lpm_policy = ATA_LPM_MAX_POWER;
2777 /* let ACPI work its magic */
2778 rc = ata_acpi_on_devcfg(dev);
2782 /* massage HPA, do it early as it might change IDENTIFY data */
2783 rc = ata_hpa_resize(dev);
2787 /* print device capabilities */
2789 "%s: cfg 49:%04x 82:%04x 83:%04x 84:%04x "
2790 "85:%04x 86:%04x 87:%04x 88:%04x\n",
2792 id[49], id[82], id[83], id[84],
2793 id[85], id[86], id[87], id[88]);
2795 /* initialize to-be-configured parameters */
2796 dev->flags &= ~ATA_DFLAG_CFG_MASK;
2797 dev->max_sectors = 0;
2803 dev->multi_count = 0;
2806 * common ATA, ATAPI feature tests
2809 /* find max transfer mode; for printk only */
2810 xfer_mask = ata_id_xfermask(id);
2812 ata_dump_id(dev, id);
2814 /* SCSI only uses 4-char revisions, dump full 8 chars from ATA */
2815 ata_id_c_string(dev->id, fwrevbuf, ATA_ID_FW_REV,
2818 ata_id_c_string(dev->id, modelbuf, ATA_ID_PROD,
2821 /* ATA-specific feature tests */
2822 if (dev->class == ATA_DEV_ATA || dev->class == ATA_DEV_ZAC) {
2823 if (ata_id_is_cfa(id)) {
2824 /* CPRM may make this media unusable */
2825 if (id[ATA_ID_CFA_KEY_MGMT] & 1)
2827 "supports DRM functions and may not be fully accessible\n");
2828 snprintf(revbuf, 7, "CFA");
2830 snprintf(revbuf, 7, "ATA-%d", ata_id_major_version(id));
2831 /* Warn the user if the device has TPM extensions */
2832 if (ata_id_has_tpm(id))
2834 "supports DRM functions and may not be fully accessible\n");
2837 dev->n_sectors = ata_id_n_sectors(id);
2839 /* get current R/W Multiple count setting */
2840 if ((dev->id[47] >> 8) == 0x80 && (dev->id[59] & 0x100)) {
2841 unsigned int max = dev->id[47] & 0xff;
2842 unsigned int cnt = dev->id[59] & 0xff;
2843 /* only recognize/allow powers of two here */
2844 if (is_power_of_2(max) && is_power_of_2(cnt))
2846 dev->multi_count = cnt;
2849 /* print device info to dmesg */
2851 ata_dev_info(dev, "%s: %s, %s, max %s\n",
2852 revbuf, modelbuf, fwrevbuf,
2853 ata_mode_string(xfer_mask));
2855 if (ata_id_has_lba(id)) {
2856 rc = ata_dev_config_lba(dev);
2860 ata_dev_config_chs(dev);
2863 ata_dev_config_fua(dev);
2864 ata_dev_config_devslp(dev);
2865 ata_dev_config_sense_reporting(dev);
2866 ata_dev_config_zac(dev);
2867 ata_dev_config_trusted(dev);
2868 ata_dev_config_cpr(dev);
2869 ata_dev_config_cdl(dev);
2873 ata_dev_print_features(dev);
2876 /* ATAPI-specific feature tests */
2877 else if (dev->class == ATA_DEV_ATAPI) {
2878 const char *cdb_intr_string = "";
2879 const char *atapi_an_string = "";
2880 const char *dma_dir_string = "";
2883 rc = atapi_cdb_len(id);
2884 if ((rc < 12) || (rc > ATAPI_CDB_LEN)) {
2885 ata_dev_warn(dev, "unsupported CDB len %d\n", rc);
2889 dev->cdb_len = (unsigned int) rc;
2891 /* Enable ATAPI AN if both the host and device have
2892 * the support. If PMP is attached, SNTF is required
2893 * to enable ATAPI AN to discern between PHY status
2894 * changed notifications and ATAPI ANs.
2897 (ap->flags & ATA_FLAG_AN) && ata_id_has_atapi_AN(id) &&
2898 (!sata_pmp_attached(ap) ||
2899 sata_scr_read(&ap->link, SCR_NOTIFICATION, &sntf) == 0)) {
2900 /* issue SET feature command to turn this on */
2901 err_mask = ata_dev_set_feature(dev,
2902 SETFEATURES_SATA_ENABLE, SATA_AN);
2905 "failed to enable ATAPI AN (err_mask=0x%x)\n",
2908 dev->flags |= ATA_DFLAG_AN;
2909 atapi_an_string = ", ATAPI AN";
2913 if (ata_id_cdb_intr(dev->id)) {
2914 dev->flags |= ATA_DFLAG_CDB_INTR;
2915 cdb_intr_string = ", CDB intr";
2918 if (atapi_dmadir || (dev->horkage & ATA_HORKAGE_ATAPI_DMADIR) || atapi_id_dmadir(dev->id)) {
2919 dev->flags |= ATA_DFLAG_DMADIR;
2920 dma_dir_string = ", DMADIR";
2923 if (ata_id_has_da(dev->id)) {
2924 dev->flags |= ATA_DFLAG_DA;
2928 /* print device info to dmesg */
2931 "ATAPI: %s, %s, max %s%s%s%s\n",
2933 ata_mode_string(xfer_mask),
2934 cdb_intr_string, atapi_an_string,
2938 /* determine max_sectors */
2939 dev->max_sectors = ATA_MAX_SECTORS;
2940 if (dev->flags & ATA_DFLAG_LBA48)
2941 dev->max_sectors = ATA_MAX_SECTORS_LBA48;
2943 /* Limit PATA drive on SATA cable bridge transfers to udma5,
2945 if (ata_dev_knobble(dev)) {
2947 ata_dev_info(dev, "applying bridge limits\n");
2948 dev->udma_mask &= ATA_UDMA5;
2949 dev->max_sectors = ATA_MAX_SECTORS;
2952 if ((dev->class == ATA_DEV_ATAPI) &&
2953 (atapi_command_packet_set(id) == TYPE_TAPE)) {
2954 dev->max_sectors = ATA_MAX_SECTORS_TAPE;
2955 dev->horkage |= ATA_HORKAGE_STUCK_ERR;
2958 if (dev->horkage & ATA_HORKAGE_MAX_SEC_128)
2959 dev->max_sectors = min_t(unsigned int, ATA_MAX_SECTORS_128,
2962 if (dev->horkage & ATA_HORKAGE_MAX_SEC_1024)
2963 dev->max_sectors = min_t(unsigned int, ATA_MAX_SECTORS_1024,
2966 if (dev->horkage & ATA_HORKAGE_MAX_SEC_LBA48)
2967 dev->max_sectors = ATA_MAX_SECTORS_LBA48;
2969 if (ap->ops->dev_config)
2970 ap->ops->dev_config(dev);
2972 if (dev->horkage & ATA_HORKAGE_DIAGNOSTIC) {
2973 /* Let the user know. We don't want to disallow opens for
2974 rescue purposes, or in case the vendor is just a blithering
2975 idiot. Do this after the dev_config call as some controllers
2976 with buggy firmware may want to avoid reporting false device
2981 "Drive reports diagnostics failure. This may indicate a drive\n");
2983 "fault or invalid emulation. Contact drive vendor for information.\n");
2987 if ((dev->horkage & ATA_HORKAGE_FIRMWARE_WARN) && print_info) {
2988 ata_dev_warn(dev, "WARNING: device requires firmware update to be fully functional\n");
2989 ata_dev_warn(dev, " contact the vendor or visit http://ata.wiki.kernel.org\n");
2999 * ata_cable_40wire - return 40 wire cable type
3002 * Helper method for drivers which want to hardwire 40 wire cable
3006 int ata_cable_40wire(struct ata_port *ap)
3008 return ATA_CBL_PATA40;
3010 EXPORT_SYMBOL_GPL(ata_cable_40wire);
3013 * ata_cable_80wire - return 80 wire cable type
3016 * Helper method for drivers which want to hardwire 80 wire cable
3020 int ata_cable_80wire(struct ata_port *ap)
3022 return ATA_CBL_PATA80;
3024 EXPORT_SYMBOL_GPL(ata_cable_80wire);
3027 * ata_cable_unknown - return unknown PATA cable.
3030 * Helper method for drivers which have no PATA cable detection.
3033 int ata_cable_unknown(struct ata_port *ap)
3035 return ATA_CBL_PATA_UNK;
3037 EXPORT_SYMBOL_GPL(ata_cable_unknown);
3040 * ata_cable_ignore - return ignored PATA cable.
3043 * Helper method for drivers which don't use cable type to limit
3046 int ata_cable_ignore(struct ata_port *ap)
3048 return ATA_CBL_PATA_IGN;
3050 EXPORT_SYMBOL_GPL(ata_cable_ignore);
3053 * ata_cable_sata - return SATA cable type
3056 * Helper method for drivers which have SATA cables
3059 int ata_cable_sata(struct ata_port *ap)
3061 return ATA_CBL_SATA;
3063 EXPORT_SYMBOL_GPL(ata_cable_sata);
3066 * ata_bus_probe - Reset and probe ATA bus
3069 * Master ATA bus probing function. Initiates a hardware-dependent
3070 * bus reset, then attempts to identify any devices found on
3074 * PCI/etc. bus probe sem.
3077 * Zero on success, negative errno otherwise.
3080 int ata_bus_probe(struct ata_port *ap)
3082 unsigned int classes[ATA_MAX_DEVICES];
3083 int tries[ATA_MAX_DEVICES];
3085 struct ata_device *dev;
3087 ata_for_each_dev(dev, &ap->link, ALL)
3088 tries[dev->devno] = ATA_PROBE_MAX_TRIES;
3091 ata_for_each_dev(dev, &ap->link, ALL) {
3092 /* If we issue an SRST then an ATA drive (not ATAPI)
3093 * may change configuration and be in PIO0 timing. If
3094 * we do a hard reset (or are coming from power on)
3095 * this is true for ATA or ATAPI. Until we've set a
3096 * suitable controller mode we should not touch the
3097 * bus as we may be talking too fast.
3099 dev->pio_mode = XFER_PIO_0;
3100 dev->dma_mode = 0xff;
3102 /* If the controller has a pio mode setup function
3103 * then use it to set the chipset to rights. Don't
3104 * touch the DMA setup as that will be dealt with when
3105 * configuring devices.
3107 if (ap->ops->set_piomode)
3108 ap->ops->set_piomode(ap, dev);
3111 /* reset and determine device classes */
3112 ap->ops->phy_reset(ap);
3114 ata_for_each_dev(dev, &ap->link, ALL) {
3115 if (dev->class != ATA_DEV_UNKNOWN)
3116 classes[dev->devno] = dev->class;
3118 classes[dev->devno] = ATA_DEV_NONE;
3120 dev->class = ATA_DEV_UNKNOWN;
3123 /* read IDENTIFY page and configure devices. We have to do the identify
3124 specific sequence bass-ackwards so that PDIAG- is released by
3127 ata_for_each_dev(dev, &ap->link, ALL_REVERSE) {
3128 if (tries[dev->devno])
3129 dev->class = classes[dev->devno];
3131 if (!ata_dev_enabled(dev))
3134 rc = ata_dev_read_id(dev, &dev->class, ATA_READID_POSTRESET,
3140 /* Now ask for the cable type as PDIAG- should have been released */
3141 if (ap->ops->cable_detect)
3142 ap->cbl = ap->ops->cable_detect(ap);
3144 /* We may have SATA bridge glue hiding here irrespective of
3145 * the reported cable types and sensed types. When SATA
3146 * drives indicate we have a bridge, we don't know which end
3147 * of the link the bridge is which is a problem.
3149 ata_for_each_dev(dev, &ap->link, ENABLED)
3150 if (ata_id_is_sata(dev->id))
3151 ap->cbl = ATA_CBL_SATA;
3153 /* After the identify sequence we can now set up the devices. We do
3154 this in the normal order so that the user doesn't get confused */
3156 ata_for_each_dev(dev, &ap->link, ENABLED) {
3157 ap->link.eh_context.i.flags |= ATA_EHI_PRINTINFO;
3158 rc = ata_dev_configure(dev);
3159 ap->link.eh_context.i.flags &= ~ATA_EHI_PRINTINFO;
3164 /* configure transfer mode */
3165 rc = ata_set_mode(&ap->link, &dev);
3169 ata_for_each_dev(dev, &ap->link, ENABLED)
3175 tries[dev->devno]--;
3179 /* eeek, something went very wrong, give up */
3180 tries[dev->devno] = 0;
3184 /* give it just one more chance */
3185 tries[dev->devno] = min(tries[dev->devno], 1);
3188 if (tries[dev->devno] == 1) {
3189 /* This is the last chance, better to slow
3190 * down than lose it.
3192 sata_down_spd_limit(&ap->link, 0);
3193 ata_down_xfermask_limit(dev, ATA_DNXFER_PIO);
3197 if (!tries[dev->devno])
3198 ata_dev_disable(dev);
3204 * sata_print_link_status - Print SATA link status
3205 * @link: SATA link to printk link status about
3207 * This function prints link speed and status of a SATA link.
3212 static void sata_print_link_status(struct ata_link *link)
3214 u32 sstatus, scontrol, tmp;
3216 if (sata_scr_read(link, SCR_STATUS, &sstatus))
3218 if (sata_scr_read(link, SCR_CONTROL, &scontrol))
3221 if (ata_phys_link_online(link)) {
3222 tmp = (sstatus >> 4) & 0xf;
3223 ata_link_info(link, "SATA link up %s (SStatus %X SControl %X)\n",
3224 sata_spd_string(tmp), sstatus, scontrol);
3226 ata_link_info(link, "SATA link down (SStatus %X SControl %X)\n",
3232 * ata_dev_pair - return other device on cable
3235 * Obtain the other device on the same cable, or if none is
3236 * present NULL is returned
3239 struct ata_device *ata_dev_pair(struct ata_device *adev)
3241 struct ata_link *link = adev->link;
3242 struct ata_device *pair = &link->device[1 - adev->devno];
3243 if (!ata_dev_enabled(pair))
3247 EXPORT_SYMBOL_GPL(ata_dev_pair);
3250 * sata_down_spd_limit - adjust SATA spd limit downward
3251 * @link: Link to adjust SATA spd limit for
3252 * @spd_limit: Additional limit
3254 * Adjust SATA spd limit of @link downward. Note that this
3255 * function only adjusts the limit. The change must be applied
3256 * using sata_set_spd().
3258 * If @spd_limit is non-zero, the speed is limited to equal to or
3259 * lower than @spd_limit if such speed is supported. If
3260 * @spd_limit is slower than any supported speed, only the lowest
3261 * supported speed is allowed.
3264 * Inherited from caller.
3267 * 0 on success, negative errno on failure
3269 int sata_down_spd_limit(struct ata_link *link, u32 spd_limit)
3271 u32 sstatus, spd, mask;
3274 if (!sata_scr_valid(link))
3277 /* If SCR can be read, use it to determine the current SPD.
3278 * If not, use cached value in link->sata_spd.
3280 rc = sata_scr_read(link, SCR_STATUS, &sstatus);
3281 if (rc == 0 && ata_sstatus_online(sstatus))
3282 spd = (sstatus >> 4) & 0xf;
3284 spd = link->sata_spd;
3286 mask = link->sata_spd_limit;
3290 /* unconditionally mask off the highest bit */
3291 bit = fls(mask) - 1;
3292 mask &= ~(1 << bit);
3295 * Mask off all speeds higher than or equal to the current one. At
3296 * this point, if current SPD is not available and we previously
3297 * recorded the link speed from SStatus, the driver has already
3298 * masked off the highest bit so mask should already be 1 or 0.
3299 * Otherwise, we should not force 1.5Gbps on a link where we have
3300 * not previously recorded speed from SStatus. Just return in this
3304 mask &= (1 << (spd - 1)) - 1;
3305 else if (link->sata_spd)
3308 /* were we already at the bottom? */
3313 if (mask & ((1 << spd_limit) - 1))
3314 mask &= (1 << spd_limit) - 1;
3316 bit = ffs(mask) - 1;
3321 link->sata_spd_limit = mask;
3323 ata_link_warn(link, "limiting SATA link speed to %s\n",
3324 sata_spd_string(fls(mask)));
3329 #ifdef CONFIG_ATA_ACPI
3331 * ata_timing_cycle2mode - find xfer mode for the specified cycle duration
3332 * @xfer_shift: ATA_SHIFT_* value for transfer type to examine.
3333 * @cycle: cycle duration in ns
3335 * Return matching xfer mode for @cycle. The returned mode is of
3336 * the transfer type specified by @xfer_shift. If @cycle is too
3337 * slow for @xfer_shift, 0xff is returned. If @cycle is faster
3338 * than the fastest known mode, the fasted mode is returned.
3344 * Matching xfer_mode, 0xff if no match found.
3346 u8 ata_timing_cycle2mode(unsigned int xfer_shift, int cycle)
3348 u8 base_mode = 0xff, last_mode = 0xff;
3349 const struct ata_xfer_ent *ent;
3350 const struct ata_timing *t;
3352 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
3353 if (ent->shift == xfer_shift)
3354 base_mode = ent->base;
3356 for (t = ata_timing_find_mode(base_mode);
3357 t && ata_xfer_mode2shift(t->mode) == xfer_shift; t++) {
3358 unsigned short this_cycle;
3360 switch (xfer_shift) {
3362 case ATA_SHIFT_MWDMA:
3363 this_cycle = t->cycle;
3365 case ATA_SHIFT_UDMA:
3366 this_cycle = t->udma;
3372 if (cycle > this_cycle)
3375 last_mode = t->mode;
3383 * ata_down_xfermask_limit - adjust dev xfer masks downward
3384 * @dev: Device to adjust xfer masks
3385 * @sel: ATA_DNXFER_* selector
3387 * Adjust xfer masks of @dev downward. Note that this function
3388 * does not apply the change. Invoking ata_set_mode() afterwards
3389 * will apply the limit.
3392 * Inherited from caller.
3395 * 0 on success, negative errno on failure
3397 int ata_down_xfermask_limit(struct ata_device *dev, unsigned int sel)
3400 unsigned int orig_mask, xfer_mask;
3401 unsigned int pio_mask, mwdma_mask, udma_mask;
3404 quiet = !!(sel & ATA_DNXFER_QUIET);
3405 sel &= ~ATA_DNXFER_QUIET;
3407 xfer_mask = orig_mask = ata_pack_xfermask(dev->pio_mask,
3410 ata_unpack_xfermask(xfer_mask, &pio_mask, &mwdma_mask, &udma_mask);
3413 case ATA_DNXFER_PIO:
3414 highbit = fls(pio_mask) - 1;
3415 pio_mask &= ~(1 << highbit);
3418 case ATA_DNXFER_DMA:
3420 highbit = fls(udma_mask) - 1;
3421 udma_mask &= ~(1 << highbit);
3424 } else if (mwdma_mask) {
3425 highbit = fls(mwdma_mask) - 1;
3426 mwdma_mask &= ~(1 << highbit);
3432 case ATA_DNXFER_40C:
3433 udma_mask &= ATA_UDMA_MASK_40C;
3436 case ATA_DNXFER_FORCE_PIO0:
3439 case ATA_DNXFER_FORCE_PIO:
3448 xfer_mask &= ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask);
3450 if (!(xfer_mask & ATA_MASK_PIO) || xfer_mask == orig_mask)
3454 if (xfer_mask & (ATA_MASK_MWDMA | ATA_MASK_UDMA))
3455 snprintf(buf, sizeof(buf), "%s:%s",
3456 ata_mode_string(xfer_mask),
3457 ata_mode_string(xfer_mask & ATA_MASK_PIO));
3459 snprintf(buf, sizeof(buf), "%s",
3460 ata_mode_string(xfer_mask));
3462 ata_dev_warn(dev, "limiting speed to %s\n", buf);
3465 ata_unpack_xfermask(xfer_mask, &dev->pio_mask, &dev->mwdma_mask,
3471 static int ata_dev_set_mode(struct ata_device *dev)
3473 struct ata_port *ap = dev->link->ap;
3474 struct ata_eh_context *ehc = &dev->link->eh_context;
3475 const bool nosetxfer = dev->horkage & ATA_HORKAGE_NOSETXFER;
3476 const char *dev_err_whine = "";
3477 int ign_dev_err = 0;
3478 unsigned int err_mask = 0;
3481 dev->flags &= ~ATA_DFLAG_PIO;
3482 if (dev->xfer_shift == ATA_SHIFT_PIO)
3483 dev->flags |= ATA_DFLAG_PIO;
3485 if (nosetxfer && ap->flags & ATA_FLAG_SATA && ata_id_is_sata(dev->id))
3486 dev_err_whine = " (SET_XFERMODE skipped)";
3490 "NOSETXFER but PATA detected - can't "
3491 "skip SETXFER, might malfunction\n");
3492 err_mask = ata_dev_set_xfermode(dev);
3495 if (err_mask & ~AC_ERR_DEV)
3499 ehc->i.flags |= ATA_EHI_POST_SETMODE;
3500 rc = ata_dev_revalidate(dev, ATA_DEV_UNKNOWN, 0);
3501 ehc->i.flags &= ~ATA_EHI_POST_SETMODE;
3505 if (dev->xfer_shift == ATA_SHIFT_PIO) {
3506 /* Old CFA may refuse this command, which is just fine */
3507 if (ata_id_is_cfa(dev->id))
3509 /* Catch several broken garbage emulations plus some pre
3511 if (ata_id_major_version(dev->id) == 0 &&
3512 dev->pio_mode <= XFER_PIO_2)
3514 /* Some very old devices and some bad newer ones fail
3515 any kind of SET_XFERMODE request but support PIO0-2
3516 timings and no IORDY */
3517 if (!ata_id_has_iordy(dev->id) && dev->pio_mode <= XFER_PIO_2)
3520 /* Early MWDMA devices do DMA but don't allow DMA mode setting.
3521 Don't fail an MWDMA0 set IFF the device indicates it is in MWDMA0 */
3522 if (dev->xfer_shift == ATA_SHIFT_MWDMA &&
3523 dev->dma_mode == XFER_MW_DMA_0 &&
3524 (dev->id[63] >> 8) & 1)
3527 /* if the device is actually configured correctly, ignore dev err */
3528 if (dev->xfer_mode == ata_xfer_mask2mode(ata_id_xfermask(dev->id)))
3531 if (err_mask & AC_ERR_DEV) {
3535 dev_err_whine = " (device error ignored)";
3538 ata_dev_dbg(dev, "xfer_shift=%u, xfer_mode=0x%x\n",
3539 dev->xfer_shift, (int)dev->xfer_mode);
3541 if (!(ehc->i.flags & ATA_EHI_QUIET) ||
3542 ehc->i.flags & ATA_EHI_DID_HARDRESET)
3543 ata_dev_info(dev, "configured for %s%s\n",
3544 ata_mode_string(ata_xfer_mode2mask(dev->xfer_mode)),
3550 ata_dev_err(dev, "failed to set xfermode (err_mask=0x%x)\n", err_mask);
3555 * ata_do_set_mode - Program timings and issue SET FEATURES - XFER
3556 * @link: link on which timings will be programmed
3557 * @r_failed_dev: out parameter for failed device
3559 * Standard implementation of the function used to tune and set
3560 * ATA device disk transfer mode (PIO3, UDMA6, etc.). If
3561 * ata_dev_set_mode() fails, pointer to the failing device is
3562 * returned in @r_failed_dev.
3565 * PCI/etc. bus probe sem.
3568 * 0 on success, negative errno otherwise
3571 int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev)
3573 struct ata_port *ap = link->ap;
3574 struct ata_device *dev;
3575 int rc = 0, used_dma = 0, found = 0;
3577 /* step 1: calculate xfer_mask */
3578 ata_for_each_dev(dev, link, ENABLED) {
3579 unsigned int pio_mask, dma_mask;
3580 unsigned int mode_mask;
3582 mode_mask = ATA_DMA_MASK_ATA;
3583 if (dev->class == ATA_DEV_ATAPI)
3584 mode_mask = ATA_DMA_MASK_ATAPI;
3585 else if (ata_id_is_cfa(dev->id))
3586 mode_mask = ATA_DMA_MASK_CFA;
3588 ata_dev_xfermask(dev);
3589 ata_force_xfermask(dev);
3591 pio_mask = ata_pack_xfermask(dev->pio_mask, 0, 0);
3593 if (libata_dma_mask & mode_mask)
3594 dma_mask = ata_pack_xfermask(0, dev->mwdma_mask,
3599 dev->pio_mode = ata_xfer_mask2mode(pio_mask);
3600 dev->dma_mode = ata_xfer_mask2mode(dma_mask);
3603 if (ata_dma_enabled(dev))
3609 /* step 2: always set host PIO timings */
3610 ata_for_each_dev(dev, link, ENABLED) {
3611 if (dev->pio_mode == 0xff) {
3612 ata_dev_warn(dev, "no PIO support\n");
3617 dev->xfer_mode = dev->pio_mode;
3618 dev->xfer_shift = ATA_SHIFT_PIO;
3619 if (ap->ops->set_piomode)
3620 ap->ops->set_piomode(ap, dev);
3623 /* step 3: set host DMA timings */
3624 ata_for_each_dev(dev, link, ENABLED) {
3625 if (!ata_dma_enabled(dev))
3628 dev->xfer_mode = dev->dma_mode;
3629 dev->xfer_shift = ata_xfer_mode2shift(dev->dma_mode);
3630 if (ap->ops->set_dmamode)
3631 ap->ops->set_dmamode(ap, dev);
3634 /* step 4: update devices' xfer mode */
3635 ata_for_each_dev(dev, link, ENABLED) {
3636 rc = ata_dev_set_mode(dev);
3641 /* Record simplex status. If we selected DMA then the other
3642 * host channels are not permitted to do so.
3644 if (used_dma && (ap->host->flags & ATA_HOST_SIMPLEX))
3645 ap->host->simplex_claimed = ap;
3649 *r_failed_dev = dev;
3652 EXPORT_SYMBOL_GPL(ata_do_set_mode);
3655 * ata_wait_ready - wait for link to become ready
3656 * @link: link to be waited on
3657 * @deadline: deadline jiffies for the operation
3658 * @check_ready: callback to check link readiness
3660 * Wait for @link to become ready. @check_ready should return
3661 * positive number if @link is ready, 0 if it isn't, -ENODEV if
3662 * link doesn't seem to be occupied, other errno for other error
3665 * Transient -ENODEV conditions are allowed for
3666 * ATA_TMOUT_FF_WAIT.
3672 * 0 if @link is ready before @deadline; otherwise, -errno.
3674 int ata_wait_ready(struct ata_link *link, unsigned long deadline,
3675 int (*check_ready)(struct ata_link *link))
3677 unsigned long start = jiffies;
3678 unsigned long nodev_deadline;
3681 /* choose which 0xff timeout to use, read comment in libata.h */
3682 if (link->ap->host->flags & ATA_HOST_PARALLEL_SCAN)
3683 nodev_deadline = ata_deadline(start, ATA_TMOUT_FF_WAIT_LONG);
3685 nodev_deadline = ata_deadline(start, ATA_TMOUT_FF_WAIT);
3687 /* Slave readiness can't be tested separately from master. On
3688 * M/S emulation configuration, this function should be called
3689 * only on the master and it will handle both master and slave.
3691 WARN_ON(link == link->ap->slave_link);
3693 if (time_after(nodev_deadline, deadline))
3694 nodev_deadline = deadline;
3697 unsigned long now = jiffies;
3700 ready = tmp = check_ready(link);
3705 * -ENODEV could be transient. Ignore -ENODEV if link
3706 * is online. Also, some SATA devices take a long
3707 * time to clear 0xff after reset. Wait for
3708 * ATA_TMOUT_FF_WAIT[_LONG] on -ENODEV if link isn't
3711 * Note that some PATA controllers (pata_ali) explode
3712 * if status register is read more than once when
3713 * there's no device attached.
3715 if (ready == -ENODEV) {
3716 if (ata_link_online(link))
3718 else if ((link->ap->flags & ATA_FLAG_SATA) &&
3719 !ata_link_offline(link) &&
3720 time_before(now, nodev_deadline))
3726 if (time_after(now, deadline))
3729 if (!warned && time_after(now, start + 5 * HZ) &&
3730 (deadline - now > 3 * HZ)) {
3732 "link is slow to respond, please be patient "
3733 "(ready=%d)\n", tmp);
3737 ata_msleep(link->ap, 50);
3742 * ata_wait_after_reset - wait for link to become ready after reset
3743 * @link: link to be waited on
3744 * @deadline: deadline jiffies for the operation
3745 * @check_ready: callback to check link readiness
3747 * Wait for @link to become ready after reset.
3753 * 0 if @link is ready before @deadline; otherwise, -errno.
3755 int ata_wait_after_reset(struct ata_link *link, unsigned long deadline,
3756 int (*check_ready)(struct ata_link *link))
3758 ata_msleep(link->ap, ATA_WAIT_AFTER_RESET);
3760 return ata_wait_ready(link, deadline, check_ready);
3762 EXPORT_SYMBOL_GPL(ata_wait_after_reset);
3765 * ata_std_prereset - prepare for reset
3766 * @link: ATA link to be reset
3767 * @deadline: deadline jiffies for the operation
3769 * @link is about to be reset. Initialize it. Failure from
3770 * prereset makes libata abort whole reset sequence and give up
3771 * that port, so prereset should be best-effort. It does its
3772 * best to prepare for reset sequence but if things go wrong, it
3773 * should just whine, not fail.
3776 * Kernel thread context (may sleep)
3781 int ata_std_prereset(struct ata_link *link, unsigned long deadline)
3783 struct ata_port *ap = link->ap;
3784 struct ata_eh_context *ehc = &link->eh_context;
3785 const unsigned long *timing = sata_ehc_deb_timing(ehc);
3788 /* if we're about to do hardreset, nothing more to do */
3789 if (ehc->i.action & ATA_EH_HARDRESET)
3792 /* if SATA, resume link */
3793 if (ap->flags & ATA_FLAG_SATA) {
3794 rc = sata_link_resume(link, timing, deadline);
3795 /* whine about phy resume failure but proceed */
3796 if (rc && rc != -EOPNOTSUPP)
3798 "failed to resume link for reset (errno=%d)\n",
3802 /* no point in trying softreset on offline link */
3803 if (ata_phys_link_offline(link))
3804 ehc->i.action &= ~ATA_EH_SOFTRESET;
3808 EXPORT_SYMBOL_GPL(ata_std_prereset);
3811 * sata_std_hardreset - COMRESET w/o waiting or classification
3812 * @link: link to reset
3813 * @class: resulting class of attached device
3814 * @deadline: deadline jiffies for the operation
3816 * Standard SATA COMRESET w/o waiting or classification.
3819 * Kernel thread context (may sleep)
3822 * 0 if link offline, -EAGAIN if link online, -errno on errors.
3824 int sata_std_hardreset(struct ata_link *link, unsigned int *class,
3825 unsigned long deadline)
3827 const unsigned long *timing = sata_ehc_deb_timing(&link->eh_context);
3832 rc = sata_link_hardreset(link, timing, deadline, &online, NULL);
3833 return online ? -EAGAIN : rc;
3835 EXPORT_SYMBOL_GPL(sata_std_hardreset);
3838 * ata_std_postreset - standard postreset callback
3839 * @link: the target ata_link
3840 * @classes: classes of attached devices
3842 * This function is invoked after a successful reset. Note that
3843 * the device might have been reset more than once using
3844 * different reset methods before postreset is invoked.
3847 * Kernel thread context (may sleep)
3849 void ata_std_postreset(struct ata_link *link, unsigned int *classes)
3853 /* reset complete, clear SError */
3854 if (!sata_scr_read(link, SCR_ERROR, &serror))
3855 sata_scr_write(link, SCR_ERROR, serror);
3857 /* print link status */
3858 sata_print_link_status(link);
3860 EXPORT_SYMBOL_GPL(ata_std_postreset);
3863 * ata_dev_same_device - Determine whether new ID matches configured device
3864 * @dev: device to compare against
3865 * @new_class: class of the new device
3866 * @new_id: IDENTIFY page of the new device
3868 * Compare @new_class and @new_id against @dev and determine
3869 * whether @dev is the device indicated by @new_class and
3876 * 1 if @dev matches @new_class and @new_id, 0 otherwise.
3878 static int ata_dev_same_device(struct ata_device *dev, unsigned int new_class,
3881 const u16 *old_id = dev->id;
3882 unsigned char model[2][ATA_ID_PROD_LEN + 1];
3883 unsigned char serial[2][ATA_ID_SERNO_LEN + 1];
3885 if (dev->class != new_class) {
3886 ata_dev_info(dev, "class mismatch %d != %d\n",
3887 dev->class, new_class);
3891 ata_id_c_string(old_id, model[0], ATA_ID_PROD, sizeof(model[0]));
3892 ata_id_c_string(new_id, model[1], ATA_ID_PROD, sizeof(model[1]));
3893 ata_id_c_string(old_id, serial[0], ATA_ID_SERNO, sizeof(serial[0]));
3894 ata_id_c_string(new_id, serial[1], ATA_ID_SERNO, sizeof(serial[1]));
3896 if (strcmp(model[0], model[1])) {
3897 ata_dev_info(dev, "model number mismatch '%s' != '%s'\n",
3898 model[0], model[1]);
3902 if (strcmp(serial[0], serial[1])) {
3903 ata_dev_info(dev, "serial number mismatch '%s' != '%s'\n",
3904 serial[0], serial[1]);
3912 * ata_dev_reread_id - Re-read IDENTIFY data
3913 * @dev: target ATA device
3914 * @readid_flags: read ID flags
3916 * Re-read IDENTIFY page and make sure @dev is still attached to
3920 * Kernel thread context (may sleep)
3923 * 0 on success, negative errno otherwise
3925 int ata_dev_reread_id(struct ata_device *dev, unsigned int readid_flags)
3927 unsigned int class = dev->class;
3928 u16 *id = (void *)dev->link->ap->sector_buf;
3932 rc = ata_dev_read_id(dev, &class, readid_flags, id);
3936 /* is the device still there? */
3937 if (!ata_dev_same_device(dev, class, id))
3940 memcpy(dev->id, id, sizeof(id[0]) * ATA_ID_WORDS);
3945 * ata_dev_revalidate - Revalidate ATA device
3946 * @dev: device to revalidate
3947 * @new_class: new class code
3948 * @readid_flags: read ID flags
3950 * Re-read IDENTIFY page, make sure @dev is still attached to the
3951 * port and reconfigure it according to the new IDENTIFY page.
3954 * Kernel thread context (may sleep)
3957 * 0 on success, negative errno otherwise
3959 int ata_dev_revalidate(struct ata_device *dev, unsigned int new_class,
3960 unsigned int readid_flags)
3962 u64 n_sectors = dev->n_sectors;
3963 u64 n_native_sectors = dev->n_native_sectors;
3966 if (!ata_dev_enabled(dev))
3969 /* fail early if !ATA && !ATAPI to avoid issuing [P]IDENTIFY to PMP */
3970 if (ata_class_enabled(new_class) && new_class == ATA_DEV_PMP) {
3971 ata_dev_info(dev, "class mismatch %u != %u\n",
3972 dev->class, new_class);
3978 rc = ata_dev_reread_id(dev, readid_flags);
3982 /* configure device according to the new ID */
3983 rc = ata_dev_configure(dev);
3987 /* verify n_sectors hasn't changed */
3988 if (dev->class != ATA_DEV_ATA || !n_sectors ||
3989 dev->n_sectors == n_sectors)
3992 /* n_sectors has changed */
3993 ata_dev_warn(dev, "n_sectors mismatch %llu != %llu\n",
3994 (unsigned long long)n_sectors,
3995 (unsigned long long)dev->n_sectors);
3998 * Something could have caused HPA to be unlocked
3999 * involuntarily. If n_native_sectors hasn't changed and the
4000 * new size matches it, keep the device.
4002 if (dev->n_native_sectors == n_native_sectors &&
4003 dev->n_sectors > n_sectors && dev->n_sectors == n_native_sectors) {
4005 "new n_sectors matches native, probably "
4006 "late HPA unlock, n_sectors updated\n");
4007 /* use the larger n_sectors */
4012 * Some BIOSes boot w/o HPA but resume w/ HPA locked. Try
4013 * unlocking HPA in those cases.
4015 * https://bugzilla.kernel.org/show_bug.cgi?id=15396
4017 if (dev->n_native_sectors == n_native_sectors &&
4018 dev->n_sectors < n_sectors && n_sectors == n_native_sectors &&
4019 !(dev->horkage & ATA_HORKAGE_BROKEN_HPA)) {
4021 "old n_sectors matches native, probably "
4022 "late HPA lock, will try to unlock HPA\n");
4023 /* try unlocking HPA */
4024 dev->flags |= ATA_DFLAG_UNLOCK_HPA;
4029 /* restore original n_[native_]sectors and fail */
4030 dev->n_native_sectors = n_native_sectors;
4031 dev->n_sectors = n_sectors;
4033 ata_dev_err(dev, "revalidation failed (errno=%d)\n", rc);
4037 struct ata_blacklist_entry {
4038 const char *model_num;
4039 const char *model_rev;
4040 unsigned long horkage;
4043 static const struct ata_blacklist_entry ata_device_blacklist [] = {
4044 /* Devices with DMA related problems under Linux */
4045 { "WDC AC11000H", NULL, ATA_HORKAGE_NODMA },
4046 { "WDC AC22100H", NULL, ATA_HORKAGE_NODMA },
4047 { "WDC AC32500H", NULL, ATA_HORKAGE_NODMA },
4048 { "WDC AC33100H", NULL, ATA_HORKAGE_NODMA },
4049 { "WDC AC31600H", NULL, ATA_HORKAGE_NODMA },
4050 { "WDC AC32100H", "24.09P07", ATA_HORKAGE_NODMA },
4051 { "WDC AC23200L", "21.10N21", ATA_HORKAGE_NODMA },
4052 { "Compaq CRD-8241B", NULL, ATA_HORKAGE_NODMA },
4053 { "CRD-8400B", NULL, ATA_HORKAGE_NODMA },
4054 { "CRD-848[02]B", NULL, ATA_HORKAGE_NODMA },
4055 { "CRD-84", NULL, ATA_HORKAGE_NODMA },
4056 { "SanDisk SDP3B", NULL, ATA_HORKAGE_NODMA },
4057 { "SanDisk SDP3B-64", NULL, ATA_HORKAGE_NODMA },
4058 { "SANYO CD-ROM CRD", NULL, ATA_HORKAGE_NODMA },
4059 { "HITACHI CDR-8", NULL, ATA_HORKAGE_NODMA },
4060 { "HITACHI CDR-8[34]35",NULL, ATA_HORKAGE_NODMA },
4061 { "Toshiba CD-ROM XM-6202B", NULL, ATA_HORKAGE_NODMA },
4062 { "TOSHIBA CD-ROM XM-1702BC", NULL, ATA_HORKAGE_NODMA },
4063 { "CD-532E-A", NULL, ATA_HORKAGE_NODMA },
4064 { "E-IDE CD-ROM CR-840",NULL, ATA_HORKAGE_NODMA },
4065 { "CD-ROM Drive/F5A", NULL, ATA_HORKAGE_NODMA },
4066 { "WPI CDD-820", NULL, ATA_HORKAGE_NODMA },
4067 { "SAMSUNG CD-ROM SC-148C", NULL, ATA_HORKAGE_NODMA },
4068 { "SAMSUNG CD-ROM SC", NULL, ATA_HORKAGE_NODMA },
4069 { "ATAPI CD-ROM DRIVE 40X MAXIMUM",NULL,ATA_HORKAGE_NODMA },
4070 { "_NEC DV5800A", NULL, ATA_HORKAGE_NODMA },
4071 { "SAMSUNG CD-ROM SN-124", "N001", ATA_HORKAGE_NODMA },
4072 { "Seagate STT20000A", NULL, ATA_HORKAGE_NODMA },
4073 { " 2GB ATA Flash Disk", "ADMA428M", ATA_HORKAGE_NODMA },
4074 { "VRFDFC22048UCHC-TE*", NULL, ATA_HORKAGE_NODMA },
4075 /* Odd clown on sil3726/4726 PMPs */
4076 { "Config Disk", NULL, ATA_HORKAGE_DISABLE },
4077 /* Similar story with ASMedia 1092 */
4078 { "ASMT109x- Config", NULL, ATA_HORKAGE_DISABLE },
4080 /* Weird ATAPI devices */
4081 { "TORiSAN DVD-ROM DRD-N216", NULL, ATA_HORKAGE_MAX_SEC_128 },
4082 { "QUANTUM DAT DAT72-000", NULL, ATA_HORKAGE_ATAPI_MOD16_DMA },
4083 { "Slimtype DVD A DS8A8SH", NULL, ATA_HORKAGE_MAX_SEC_LBA48 },
4084 { "Slimtype DVD A DS8A9SH", NULL, ATA_HORKAGE_MAX_SEC_LBA48 },
4087 * Causes silent data corruption with higher max sects.
4088 * http://lkml.kernel.org/g/x49wpy40ysk.fsf@segfault.boston.devel.redhat.com
4090 { "ST380013AS", "3.20", ATA_HORKAGE_MAX_SEC_1024 },
4093 * These devices time out with higher max sects.
4094 * https://bugzilla.kernel.org/show_bug.cgi?id=121671
4096 { "LITEON CX1-JB*-HP", NULL, ATA_HORKAGE_MAX_SEC_1024 },
4097 { "LITEON EP1-*", NULL, ATA_HORKAGE_MAX_SEC_1024 },
4099 /* Devices we expect to fail diagnostics */
4101 /* Devices where NCQ should be avoided */
4103 { "WDC WD740ADFD-00", NULL, ATA_HORKAGE_NONCQ },
4104 { "WDC WD740ADFD-00NLR1", NULL, ATA_HORKAGE_NONCQ },
4105 /* http://thread.gmane.org/gmane.linux.ide/14907 */
4106 { "FUJITSU MHT2060BH", NULL, ATA_HORKAGE_NONCQ },
4108 { "Maxtor *", "BANC*", ATA_HORKAGE_NONCQ },
4109 { "Maxtor 7V300F0", "VA111630", ATA_HORKAGE_NONCQ },
4110 { "ST380817AS", "3.42", ATA_HORKAGE_NONCQ },
4111 { "ST3160023AS", "3.42", ATA_HORKAGE_NONCQ },
4112 { "OCZ CORE_SSD", "02.10104", ATA_HORKAGE_NONCQ },
4114 /* Seagate NCQ + FLUSH CACHE firmware bug */
4115 { "ST31500341AS", "SD1[5-9]", ATA_HORKAGE_NONCQ |
4116 ATA_HORKAGE_FIRMWARE_WARN },
4118 { "ST31000333AS", "SD1[5-9]", ATA_HORKAGE_NONCQ |
4119 ATA_HORKAGE_FIRMWARE_WARN },
4121 { "ST3640[36]23AS", "SD1[5-9]", ATA_HORKAGE_NONCQ |
4122 ATA_HORKAGE_FIRMWARE_WARN },
4124 { "ST3320[68]13AS", "SD1[5-9]", ATA_HORKAGE_NONCQ |
4125 ATA_HORKAGE_FIRMWARE_WARN },
4127 /* drives which fail FPDMA_AA activation (some may freeze afterwards)
4128 the ST disks also have LPM issues */
4129 { "ST1000LM024 HN-M101MBB", NULL, ATA_HORKAGE_BROKEN_FPDMA_AA |
4130 ATA_HORKAGE_NOLPM },
4131 { "VB0250EAVER", "HPG7", ATA_HORKAGE_BROKEN_FPDMA_AA },
4133 /* Blacklist entries taken from Silicon Image 3124/3132
4134 Windows driver .inf file - also several Linux problem reports */
4135 { "HTS541060G9SA00", "MB3OC60D", ATA_HORKAGE_NONCQ },
4136 { "HTS541080G9SA00", "MB4OC60D", ATA_HORKAGE_NONCQ },
4137 { "HTS541010G9SA00", "MBZOC60D", ATA_HORKAGE_NONCQ },
4139 /* https://bugzilla.kernel.org/show_bug.cgi?id=15573 */
4140 { "C300-CTFDDAC128MAG", "0001", ATA_HORKAGE_NONCQ },
4142 /* Sandisk SD7/8/9s lock up hard on large trims */
4143 { "SanDisk SD[789]*", NULL, ATA_HORKAGE_MAX_TRIM_128M },
4145 /* devices which puke on READ_NATIVE_MAX */
4146 { "HDS724040KLSA80", "KFAOA20N", ATA_HORKAGE_BROKEN_HPA },
4147 { "WDC WD3200JD-00KLB0", "WD-WCAMR1130137", ATA_HORKAGE_BROKEN_HPA },
4148 { "WDC WD2500JD-00HBB0", "WD-WMAL71490727", ATA_HORKAGE_BROKEN_HPA },
4149 { "MAXTOR 6L080L4", "A93.0500", ATA_HORKAGE_BROKEN_HPA },
4151 /* this one allows HPA unlocking but fails IOs on the area */
4152 { "OCZ-VERTEX", "1.30", ATA_HORKAGE_BROKEN_HPA },
4154 /* Devices which report 1 sector over size HPA */
4155 { "ST340823A", NULL, ATA_HORKAGE_HPA_SIZE },
4156 { "ST320413A", NULL, ATA_HORKAGE_HPA_SIZE },
4157 { "ST310211A", NULL, ATA_HORKAGE_HPA_SIZE },
4159 /* Devices which get the IVB wrong */
4160 { "QUANTUM FIREBALLlct10 05", "A03.0900", ATA_HORKAGE_IVB },
4161 /* Maybe we should just blacklist TSSTcorp... */
4162 { "TSSTcorp CDDVDW SH-S202[HJN]", "SB0[01]", ATA_HORKAGE_IVB },
4164 /* Devices that do not need bridging limits applied */
4165 { "MTRON MSP-SATA*", NULL, ATA_HORKAGE_BRIDGE_OK },
4166 { "BUFFALO HD-QSU2/R5", NULL, ATA_HORKAGE_BRIDGE_OK },
4168 /* Devices which aren't very happy with higher link speeds */
4169 { "WD My Book", NULL, ATA_HORKAGE_1_5_GBPS },
4170 { "Seagate FreeAgent GoFlex", NULL, ATA_HORKAGE_1_5_GBPS },
4173 * Devices which choke on SETXFER. Applies only if both the
4174 * device and controller are SATA.
4176 { "PIONEER DVD-RW DVRTD08", NULL, ATA_HORKAGE_NOSETXFER },
4177 { "PIONEER DVD-RW DVRTD08A", NULL, ATA_HORKAGE_NOSETXFER },
4178 { "PIONEER DVD-RW DVR-215", NULL, ATA_HORKAGE_NOSETXFER },
4179 { "PIONEER DVD-RW DVR-212D", NULL, ATA_HORKAGE_NOSETXFER },
4180 { "PIONEER DVD-RW DVR-216D", NULL, ATA_HORKAGE_NOSETXFER },
4182 /* These specific Pioneer models have LPM issues */
4183 { "PIONEER BD-RW BDR-207M", NULL, ATA_HORKAGE_NOLPM },
4184 { "PIONEER BD-RW BDR-205", NULL, ATA_HORKAGE_NOLPM },
4186 /* Crucial BX100 SSD 500GB has broken LPM support */
4187 { "CT500BX100SSD1", NULL, ATA_HORKAGE_NOLPM },
4189 /* 512GB MX100 with MU01 firmware has both queued TRIM and LPM issues */
4190 { "Crucial_CT512MX100*", "MU01", ATA_HORKAGE_NO_NCQ_TRIM |
4191 ATA_HORKAGE_ZERO_AFTER_TRIM |
4192 ATA_HORKAGE_NOLPM },
4193 /* 512GB MX100 with newer firmware has only LPM issues */
4194 { "Crucial_CT512MX100*", NULL, ATA_HORKAGE_ZERO_AFTER_TRIM |
4195 ATA_HORKAGE_NOLPM },
4197 /* 480GB+ M500 SSDs have both queued TRIM and LPM issues */
4198 { "Crucial_CT480M500*", NULL, ATA_HORKAGE_NO_NCQ_TRIM |
4199 ATA_HORKAGE_ZERO_AFTER_TRIM |
4200 ATA_HORKAGE_NOLPM },
4201 { "Crucial_CT960M500*", NULL, ATA_HORKAGE_NO_NCQ_TRIM |
4202 ATA_HORKAGE_ZERO_AFTER_TRIM |
4203 ATA_HORKAGE_NOLPM },
4205 /* These specific Samsung models/firmware-revs do not handle LPM well */
4206 { "SAMSUNG MZMPC128HBFU-000MV", "CXM14M1Q", ATA_HORKAGE_NOLPM },
4207 { "SAMSUNG SSD PM830 mSATA *", "CXM13D1Q", ATA_HORKAGE_NOLPM },
4208 { "SAMSUNG MZ7TD256HAFV-000L9", NULL, ATA_HORKAGE_NOLPM },
4209 { "SAMSUNG MZ7TE512HMHP-000L1", "EXT06L0Q", ATA_HORKAGE_NOLPM },
4211 /* devices that don't properly handle queued TRIM commands */
4212 { "Micron_M500IT_*", "MU01", ATA_HORKAGE_NO_NCQ_TRIM |
4213 ATA_HORKAGE_ZERO_AFTER_TRIM },
4214 { "Micron_M500_*", NULL, ATA_HORKAGE_NO_NCQ_TRIM |
4215 ATA_HORKAGE_ZERO_AFTER_TRIM },
4216 { "Crucial_CT*M500*", NULL, ATA_HORKAGE_NO_NCQ_TRIM |
4217 ATA_HORKAGE_ZERO_AFTER_TRIM },
4218 { "Micron_M5[15]0_*", "MU01", ATA_HORKAGE_NO_NCQ_TRIM |
4219 ATA_HORKAGE_ZERO_AFTER_TRIM },
4220 { "Crucial_CT*M550*", "MU01", ATA_HORKAGE_NO_NCQ_TRIM |
4221 ATA_HORKAGE_ZERO_AFTER_TRIM },
4222 { "Crucial_CT*MX100*", "MU01", ATA_HORKAGE_NO_NCQ_TRIM |
4223 ATA_HORKAGE_ZERO_AFTER_TRIM },
4224 { "Samsung SSD 840 EVO*", NULL, ATA_HORKAGE_NO_NCQ_TRIM |
4225 ATA_HORKAGE_NO_DMA_LOG |
4226 ATA_HORKAGE_ZERO_AFTER_TRIM },
4227 { "Samsung SSD 840*", NULL, ATA_HORKAGE_NO_NCQ_TRIM |
4228 ATA_HORKAGE_ZERO_AFTER_TRIM },
4229 { "Samsung SSD 850*", NULL, ATA_HORKAGE_NO_NCQ_TRIM |
4230 ATA_HORKAGE_ZERO_AFTER_TRIM },
4231 { "Samsung SSD 860*", NULL, ATA_HORKAGE_NO_NCQ_TRIM |
4232 ATA_HORKAGE_ZERO_AFTER_TRIM |
4233 ATA_HORKAGE_NO_NCQ_ON_ATI },
4234 { "Samsung SSD 870*", NULL, ATA_HORKAGE_NO_NCQ_TRIM |
4235 ATA_HORKAGE_ZERO_AFTER_TRIM |
4236 ATA_HORKAGE_NO_NCQ_ON_ATI },
4237 { "SAMSUNG*MZ7LH*", NULL, ATA_HORKAGE_NO_NCQ_TRIM |
4238 ATA_HORKAGE_ZERO_AFTER_TRIM |
4239 ATA_HORKAGE_NO_NCQ_ON_ATI, },
4240 { "FCCT*M500*", NULL, ATA_HORKAGE_NO_NCQ_TRIM |
4241 ATA_HORKAGE_ZERO_AFTER_TRIM },
4243 /* devices that don't properly handle TRIM commands */
4244 { "SuperSSpeed S238*", NULL, ATA_HORKAGE_NOTRIM },
4245 { "M88V29*", NULL, ATA_HORKAGE_NOTRIM },
4248 * As defined, the DRAT (Deterministic Read After Trim) and RZAT
4249 * (Return Zero After Trim) flags in the ATA Command Set are
4250 * unreliable in the sense that they only define what happens if
4251 * the device successfully executed the DSM TRIM command. TRIM
4252 * is only advisory, however, and the device is free to silently
4253 * ignore all or parts of the request.
4255 * Whitelist drives that are known to reliably return zeroes
4260 * The intel 510 drive has buggy DRAT/RZAT. Explicitly exclude
4261 * that model before whitelisting all other intel SSDs.
4263 { "INTEL*SSDSC2MH*", NULL, 0 },
4265 { "Micron*", NULL, ATA_HORKAGE_ZERO_AFTER_TRIM },
4266 { "Crucial*", NULL, ATA_HORKAGE_ZERO_AFTER_TRIM },
4267 { "INTEL*SSD*", NULL, ATA_HORKAGE_ZERO_AFTER_TRIM },
4268 { "SSD*INTEL*", NULL, ATA_HORKAGE_ZERO_AFTER_TRIM },
4269 { "Samsung*SSD*", NULL, ATA_HORKAGE_ZERO_AFTER_TRIM },
4270 { "SAMSUNG*SSD*", NULL, ATA_HORKAGE_ZERO_AFTER_TRIM },
4271 { "SAMSUNG*MZ7KM*", NULL, ATA_HORKAGE_ZERO_AFTER_TRIM },
4272 { "ST[1248][0248]0[FH]*", NULL, ATA_HORKAGE_ZERO_AFTER_TRIM },
4275 * Some WD SATA-I drives spin up and down erratically when the link
4276 * is put into the slumber mode. We don't have full list of the
4277 * affected devices. Disable LPM if the device matches one of the
4278 * known prefixes and is SATA-1. As a side effect LPM partial is
4281 * https://bugzilla.kernel.org/show_bug.cgi?id=57211
4283 { "WDC WD800JD-*", NULL, ATA_HORKAGE_WD_BROKEN_LPM },
4284 { "WDC WD1200JD-*", NULL, ATA_HORKAGE_WD_BROKEN_LPM },
4285 { "WDC WD1600JD-*", NULL, ATA_HORKAGE_WD_BROKEN_LPM },
4286 { "WDC WD2000JD-*", NULL, ATA_HORKAGE_WD_BROKEN_LPM },
4287 { "WDC WD2500JD-*", NULL, ATA_HORKAGE_WD_BROKEN_LPM },
4288 { "WDC WD3000JD-*", NULL, ATA_HORKAGE_WD_BROKEN_LPM },
4289 { "WDC WD3200JD-*", NULL, ATA_HORKAGE_WD_BROKEN_LPM },
4292 * This sata dom device goes on a walkabout when the ATA_LOG_DIRECTORY
4293 * log page is accessed. Ensure we never ask for this log page with
4296 { "SATADOM-ML 3ME", NULL, ATA_HORKAGE_NO_LOG_DIR },
4299 { "Maxtor", "BANC1G10", ATA_HORKAGE_NO_FUA },
4300 { "WDC*WD2500J*", NULL, ATA_HORKAGE_NO_FUA },
4301 { "OCZ-VERTEX*", NULL, ATA_HORKAGE_NO_FUA },
4302 { "INTEL*SSDSC2CT*", NULL, ATA_HORKAGE_NO_FUA },
4308 static unsigned long ata_dev_blacklisted(const struct ata_device *dev)
4310 unsigned char model_num[ATA_ID_PROD_LEN + 1];
4311 unsigned char model_rev[ATA_ID_FW_REV_LEN + 1];
4312 const struct ata_blacklist_entry *ad = ata_device_blacklist;
4314 ata_id_c_string(dev->id, model_num, ATA_ID_PROD, sizeof(model_num));
4315 ata_id_c_string(dev->id, model_rev, ATA_ID_FW_REV, sizeof(model_rev));
4317 while (ad->model_num) {
4318 if (glob_match(ad->model_num, model_num)) {
4319 if (ad->model_rev == NULL)
4321 if (glob_match(ad->model_rev, model_rev))
4329 static int ata_dma_blacklisted(const struct ata_device *dev)
4331 /* We don't support polling DMA.
4332 * DMA blacklist those ATAPI devices with CDB-intr (and use PIO)
4333 * if the LLDD handles only interrupts in the HSM_ST_LAST state.
4335 if ((dev->link->ap->flags & ATA_FLAG_PIO_POLLING) &&
4336 (dev->flags & ATA_DFLAG_CDB_INTR))
4338 return (dev->horkage & ATA_HORKAGE_NODMA) ? 1 : 0;
4342 * ata_is_40wire - check drive side detection
4345 * Perform drive side detection decoding, allowing for device vendors
4346 * who can't follow the documentation.
4349 static int ata_is_40wire(struct ata_device *dev)
4351 if (dev->horkage & ATA_HORKAGE_IVB)
4352 return ata_drive_40wire_relaxed(dev->id);
4353 return ata_drive_40wire(dev->id);
4357 * cable_is_40wire - 40/80/SATA decider
4358 * @ap: port to consider
4360 * This function encapsulates the policy for speed management
4361 * in one place. At the moment we don't cache the result but
4362 * there is a good case for setting ap->cbl to the result when
4363 * we are called with unknown cables (and figuring out if it
4364 * impacts hotplug at all).
4366 * Return 1 if the cable appears to be 40 wire.
4369 static int cable_is_40wire(struct ata_port *ap)
4371 struct ata_link *link;
4372 struct ata_device *dev;
4374 /* If the controller thinks we are 40 wire, we are. */
4375 if (ap->cbl == ATA_CBL_PATA40)
4378 /* If the controller thinks we are 80 wire, we are. */
4379 if (ap->cbl == ATA_CBL_PATA80 || ap->cbl == ATA_CBL_SATA)
4382 /* If the system is known to be 40 wire short cable (eg
4383 * laptop), then we allow 80 wire modes even if the drive
4386 if (ap->cbl == ATA_CBL_PATA40_SHORT)
4389 /* If the controller doesn't know, we scan.
4391 * Note: We look for all 40 wire detects at this point. Any
4392 * 80 wire detect is taken to be 80 wire cable because
4393 * - in many setups only the one drive (slave if present) will
4394 * give a valid detect
4395 * - if you have a non detect capable drive you don't want it
4396 * to colour the choice
4398 ata_for_each_link(link, ap, EDGE) {
4399 ata_for_each_dev(dev, link, ENABLED) {
4400 if (!ata_is_40wire(dev))
4408 * ata_dev_xfermask - Compute supported xfermask of the given device
4409 * @dev: Device to compute xfermask for
4411 * Compute supported xfermask of @dev and store it in
4412 * dev->*_mask. This function is responsible for applying all
4413 * known limits including host controller limits, device
4419 static void ata_dev_xfermask(struct ata_device *dev)
4421 struct ata_link *link = dev->link;
4422 struct ata_port *ap = link->ap;
4423 struct ata_host *host = ap->host;
4424 unsigned int xfer_mask;
4426 /* controller modes available */
4427 xfer_mask = ata_pack_xfermask(ap->pio_mask,
4428 ap->mwdma_mask, ap->udma_mask);
4430 /* drive modes available */
4431 xfer_mask &= ata_pack_xfermask(dev->pio_mask,
4432 dev->mwdma_mask, dev->udma_mask);
4433 xfer_mask &= ata_id_xfermask(dev->id);
4436 * CFA Advanced TrueIDE timings are not allowed on a shared
4439 if (ata_dev_pair(dev)) {
4440 /* No PIO5 or PIO6 */
4441 xfer_mask &= ~(0x03 << (ATA_SHIFT_PIO + 5));
4442 /* No MWDMA3 or MWDMA 4 */
4443 xfer_mask &= ~(0x03 << (ATA_SHIFT_MWDMA + 3));
4446 if (ata_dma_blacklisted(dev)) {
4447 xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA);
4449 "device is on DMA blacklist, disabling DMA\n");
4452 if ((host->flags & ATA_HOST_SIMPLEX) &&
4453 host->simplex_claimed && host->simplex_claimed != ap) {
4454 xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA);
4456 "simplex DMA is claimed by other device, disabling DMA\n");
4459 if (ap->flags & ATA_FLAG_NO_IORDY)
4460 xfer_mask &= ata_pio_mask_no_iordy(dev);
4462 if (ap->ops->mode_filter)
4463 xfer_mask = ap->ops->mode_filter(dev, xfer_mask);
4465 /* Apply cable rule here. Don't apply it early because when
4466 * we handle hot plug the cable type can itself change.
4467 * Check this last so that we know if the transfer rate was
4468 * solely limited by the cable.
4469 * Unknown or 80 wire cables reported host side are checked
4470 * drive side as well. Cases where we know a 40wire cable
4471 * is used safely for 80 are not checked here.
4473 if (xfer_mask & (0xF8 << ATA_SHIFT_UDMA))
4474 /* UDMA/44 or higher would be available */
4475 if (cable_is_40wire(ap)) {
4477 "limited to UDMA/33 due to 40-wire cable\n");
4478 xfer_mask &= ~(0xF8 << ATA_SHIFT_UDMA);
4481 ata_unpack_xfermask(xfer_mask, &dev->pio_mask,
4482 &dev->mwdma_mask, &dev->udma_mask);
4486 * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command
4487 * @dev: Device to which command will be sent
4489 * Issue SET FEATURES - XFER MODE command to device @dev
4493 * PCI/etc. bus probe sem.
4496 * 0 on success, AC_ERR_* mask otherwise.
4499 static unsigned int ata_dev_set_xfermode(struct ata_device *dev)
4501 struct ata_taskfile tf;
4503 /* set up set-features taskfile */
4504 ata_dev_dbg(dev, "set features - xfer mode\n");
4506 /* Some controllers and ATAPI devices show flaky interrupt
4507 * behavior after setting xfer mode. Use polling instead.
4509 ata_tf_init(dev, &tf);
4510 tf.command = ATA_CMD_SET_FEATURES;
4511 tf.feature = SETFEATURES_XFER;
4512 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_POLLING;
4513 tf.protocol = ATA_PROT_NODATA;
4514 /* If we are using IORDY we must send the mode setting command */
4515 if (ata_pio_need_iordy(dev))
4516 tf.nsect = dev->xfer_mode;
4517 /* If the device has IORDY and the controller does not - turn it off */
4518 else if (ata_id_has_iordy(dev->id))
4520 else /* In the ancient relic department - skip all of this */
4524 * On some disks, this command causes spin-up, so we need longer
4527 return ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 15000);
4531 * ata_dev_set_feature - Issue SET FEATURES
4532 * @dev: Device to which command will be sent
4533 * @subcmd: The SET FEATURES subcommand to be sent
4534 * @action: The sector count represents a subcommand specific action
4536 * Issue SET FEATURES command to device @dev on port @ap with sector count
4539 * PCI/etc. bus probe sem.
4542 * 0 on success, AC_ERR_* mask otherwise.
4544 unsigned int ata_dev_set_feature(struct ata_device *dev, u8 subcmd, u8 action)
4546 struct ata_taskfile tf;
4547 unsigned int timeout = 0;
4549 /* set up set-features taskfile */
4550 ata_dev_dbg(dev, "set features\n");
4552 ata_tf_init(dev, &tf);
4553 tf.command = ATA_CMD_SET_FEATURES;
4554 tf.feature = subcmd;
4555 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
4556 tf.protocol = ATA_PROT_NODATA;
4559 if (subcmd == SETFEATURES_SPINUP)
4560 timeout = ata_probe_timeout ?
4561 ata_probe_timeout * 1000 : SETFEATURES_SPINUP_TIMEOUT;
4563 return ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, timeout);
4565 EXPORT_SYMBOL_GPL(ata_dev_set_feature);
4568 * ata_dev_init_params - Issue INIT DEV PARAMS command
4569 * @dev: Device to which command will be sent
4570 * @heads: Number of heads (taskfile parameter)
4571 * @sectors: Number of sectors (taskfile parameter)
4574 * Kernel thread context (may sleep)
4577 * 0 on success, AC_ERR_* mask otherwise.
4579 static unsigned int ata_dev_init_params(struct ata_device *dev,
4580 u16 heads, u16 sectors)
4582 struct ata_taskfile tf;
4583 unsigned int err_mask;
4585 /* Number of sectors per track 1-255. Number of heads 1-16 */
4586 if (sectors < 1 || sectors > 255 || heads < 1 || heads > 16)
4587 return AC_ERR_INVALID;
4589 /* set up init dev params taskfile */
4590 ata_dev_dbg(dev, "init dev params \n");
4592 ata_tf_init(dev, &tf);
4593 tf.command = ATA_CMD_INIT_DEV_PARAMS;
4594 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
4595 tf.protocol = ATA_PROT_NODATA;
4597 tf.device |= (heads - 1) & 0x0f; /* max head = num. of heads - 1 */
4599 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
4600 /* A clean abort indicates an original or just out of spec drive
4601 and we should continue as we issue the setup based on the
4602 drive reported working geometry */
4603 if (err_mask == AC_ERR_DEV && (tf.error & ATA_ABORTED))
4610 * atapi_check_dma - Check whether ATAPI DMA can be supported
4611 * @qc: Metadata associated with taskfile to check
4613 * Allow low-level driver to filter ATA PACKET commands, returning
4614 * a status indicating whether or not it is OK to use DMA for the
4615 * supplied PACKET command.
4618 * spin_lock_irqsave(host lock)
4620 * RETURNS: 0 when ATAPI DMA can be used
4623 int atapi_check_dma(struct ata_queued_cmd *qc)
4625 struct ata_port *ap = qc->ap;
4627 /* Don't allow DMA if it isn't multiple of 16 bytes. Quite a
4628 * few ATAPI devices choke on such DMA requests.
4630 if (!(qc->dev->horkage & ATA_HORKAGE_ATAPI_MOD16_DMA) &&
4631 unlikely(qc->nbytes & 15))
4634 if (ap->ops->check_atapi_dma)
4635 return ap->ops->check_atapi_dma(qc);
4641 * ata_std_qc_defer - Check whether a qc needs to be deferred
4642 * @qc: ATA command in question
4644 * Non-NCQ commands cannot run with any other command, NCQ or
4645 * not. As upper layer only knows the queue depth, we are
4646 * responsible for maintaining exclusion. This function checks
4647 * whether a new command @qc can be issued.
4650 * spin_lock_irqsave(host lock)
4653 * ATA_DEFER_* if deferring is needed, 0 otherwise.
4655 int ata_std_qc_defer(struct ata_queued_cmd *qc)
4657 struct ata_link *link = qc->dev->link;
4659 if (ata_is_ncq(qc->tf.protocol)) {
4660 if (!ata_tag_valid(link->active_tag))
4663 if (!ata_tag_valid(link->active_tag) && !link->sactive)
4667 return ATA_DEFER_LINK;
4669 EXPORT_SYMBOL_GPL(ata_std_qc_defer);
4671 enum ata_completion_errors ata_noop_qc_prep(struct ata_queued_cmd *qc)
4675 EXPORT_SYMBOL_GPL(ata_noop_qc_prep);
4678 * ata_sg_init - Associate command with scatter-gather table.
4679 * @qc: Command to be associated
4680 * @sg: Scatter-gather table.
4681 * @n_elem: Number of elements in s/g table.
4683 * Initialize the data-related elements of queued_cmd @qc
4684 * to point to a scatter-gather table @sg, containing @n_elem
4688 * spin_lock_irqsave(host lock)
4690 void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
4691 unsigned int n_elem)
4694 qc->n_elem = n_elem;
4698 #ifdef CONFIG_HAS_DMA
4701 * ata_sg_clean - Unmap DMA memory associated with command
4702 * @qc: Command containing DMA memory to be released
4704 * Unmap all mapped DMA memory associated with this command.
4707 * spin_lock_irqsave(host lock)
4709 static void ata_sg_clean(struct ata_queued_cmd *qc)
4711 struct ata_port *ap = qc->ap;
4712 struct scatterlist *sg = qc->sg;
4713 int dir = qc->dma_dir;
4715 WARN_ON_ONCE(sg == NULL);
4718 dma_unmap_sg(ap->dev, sg, qc->orig_n_elem, dir);
4720 qc->flags &= ~ATA_QCFLAG_DMAMAP;
4725 * ata_sg_setup - DMA-map the scatter-gather table associated with a command.
4726 * @qc: Command with scatter-gather table to be mapped.
4728 * DMA-map the scatter-gather table associated with queued_cmd @qc.
4731 * spin_lock_irqsave(host lock)
4734 * Zero on success, negative on error.
4737 static int ata_sg_setup(struct ata_queued_cmd *qc)
4739 struct ata_port *ap = qc->ap;
4740 unsigned int n_elem;
4742 n_elem = dma_map_sg(ap->dev, qc->sg, qc->n_elem, qc->dma_dir);
4746 qc->orig_n_elem = qc->n_elem;
4747 qc->n_elem = n_elem;
4748 qc->flags |= ATA_QCFLAG_DMAMAP;
4753 #else /* !CONFIG_HAS_DMA */
4755 static inline void ata_sg_clean(struct ata_queued_cmd *qc) {}
4756 static inline int ata_sg_setup(struct ata_queued_cmd *qc) { return -1; }
4758 #endif /* !CONFIG_HAS_DMA */
4761 * swap_buf_le16 - swap halves of 16-bit words in place
4762 * @buf: Buffer to swap
4763 * @buf_words: Number of 16-bit words in buffer.
4765 * Swap halves of 16-bit words if needed to convert from
4766 * little-endian byte order to native cpu byte order, or
4770 * Inherited from caller.
4772 void swap_buf_le16(u16 *buf, unsigned int buf_words)
4777 for (i = 0; i < buf_words; i++)
4778 buf[i] = le16_to_cpu(buf[i]);
4779 #endif /* __BIG_ENDIAN */
4783 * ata_qc_free - free unused ata_queued_cmd
4784 * @qc: Command to complete
4786 * Designed to free unused ata_queued_cmd object
4787 * in case something prevents using it.
4790 * spin_lock_irqsave(host lock)
4792 void ata_qc_free(struct ata_queued_cmd *qc)
4795 if (ata_tag_valid(qc->tag))
4796 qc->tag = ATA_TAG_POISON;
4799 void __ata_qc_complete(struct ata_queued_cmd *qc)
4801 struct ata_port *ap;
4802 struct ata_link *link;
4804 WARN_ON_ONCE(qc == NULL); /* ata_qc_from_tag _might_ return NULL */
4805 WARN_ON_ONCE(!(qc->flags & ATA_QCFLAG_ACTIVE));
4807 link = qc->dev->link;
4809 if (likely(qc->flags & ATA_QCFLAG_DMAMAP))
4812 /* command should be marked inactive atomically with qc completion */
4813 if (ata_is_ncq(qc->tf.protocol)) {
4814 link->sactive &= ~(1 << qc->hw_tag);
4816 ap->nr_active_links--;
4818 link->active_tag = ATA_TAG_POISON;
4819 ap->nr_active_links--;
4822 /* clear exclusive status */
4823 if (unlikely(qc->flags & ATA_QCFLAG_CLEAR_EXCL &&
4824 ap->excl_link == link))
4825 ap->excl_link = NULL;
4827 /* atapi: mark qc as inactive to prevent the interrupt handler
4828 * from completing the command twice later, before the error handler
4829 * is called. (when rc != 0 and atapi request sense is needed)
4831 qc->flags &= ~ATA_QCFLAG_ACTIVE;
4832 ap->qc_active &= ~(1ULL << qc->tag);
4834 /* call completion callback */
4835 qc->complete_fn(qc);
4838 static void fill_result_tf(struct ata_queued_cmd *qc)
4840 struct ata_port *ap = qc->ap;
4842 qc->result_tf.flags = qc->tf.flags;
4843 ap->ops->qc_fill_rtf(qc);
4846 static void ata_verify_xfer(struct ata_queued_cmd *qc)
4848 struct ata_device *dev = qc->dev;
4850 if (!ata_is_data(qc->tf.protocol))
4853 if ((dev->mwdma_mask || dev->udma_mask) && ata_is_pio(qc->tf.protocol))
4856 dev->flags &= ~ATA_DFLAG_DUBIOUS_XFER;
4860 * ata_qc_complete - Complete an active ATA command
4861 * @qc: Command to complete
4863 * Indicate to the mid and upper layers that an ATA command has
4864 * completed, with either an ok or not-ok status.
4866 * Refrain from calling this function multiple times when
4867 * successfully completing multiple NCQ commands.
4868 * ata_qc_complete_multiple() should be used instead, which will
4869 * properly update IRQ expect state.
4872 * spin_lock_irqsave(host lock)
4874 void ata_qc_complete(struct ata_queued_cmd *qc)
4876 struct ata_port *ap = qc->ap;
4878 /* Trigger the LED (if available) */
4879 ledtrig_disk_activity(!!(qc->tf.flags & ATA_TFLAG_WRITE));
4881 /* XXX: New EH and old EH use different mechanisms to
4882 * synchronize EH with regular execution path.
4884 * In new EH, a qc owned by EH is marked with ATA_QCFLAG_EH.
4885 * Normal execution path is responsible for not accessing a
4886 * qc owned by EH. libata core enforces the rule by returning NULL
4887 * from ata_qc_from_tag() for qcs owned by EH.
4889 * Old EH depends on ata_qc_complete() nullifying completion
4890 * requests if ATA_QCFLAG_EH_SCHEDULED is set. Old EH does
4891 * not synchronize with interrupt handler. Only PIO task is
4894 if (ap->ops->error_handler) {
4895 struct ata_device *dev = qc->dev;
4896 struct ata_eh_info *ehi = &dev->link->eh_info;
4898 if (unlikely(qc->err_mask))
4899 qc->flags |= ATA_QCFLAG_EH;
4902 * Finish internal commands without any further processing
4903 * and always with the result TF filled.
4905 if (unlikely(ata_tag_internal(qc->tag))) {
4907 trace_ata_qc_complete_internal(qc);
4908 __ata_qc_complete(qc);
4913 * Non-internal qc has failed. Fill the result TF and
4916 if (unlikely(qc->flags & ATA_QCFLAG_EH)) {
4918 trace_ata_qc_complete_failed(qc);
4919 ata_qc_schedule_eh(qc);
4923 WARN_ON_ONCE(ata_port_is_frozen(ap));
4925 /* read result TF if requested */
4926 if (qc->flags & ATA_QCFLAG_RESULT_TF)
4929 trace_ata_qc_complete_done(qc);
4932 * For CDL commands that completed without an error, check if
4933 * we have sense data (ATA_SENSE is set). If we do, then the
4934 * command may have been aborted by the device due to a limit
4935 * timeout using the policy 0xD. For these commands, invoke EH
4936 * to get the command sense data.
4938 if (qc->result_tf.status & ATA_SENSE &&
4939 ((ata_is_ncq(qc->tf.protocol) &&
4940 dev->flags & ATA_DFLAG_CDL_ENABLED) ||
4941 (!ata_is_ncq(qc->tf.protocol) &&
4942 ata_id_sense_reporting_enabled(dev->id)))) {
4944 * Tell SCSI EH to not overwrite scmd->result even if
4945 * this command is finished with result SAM_STAT_GOOD.
4947 qc->scsicmd->flags |= SCMD_FORCE_EH_SUCCESS;
4948 qc->flags |= ATA_QCFLAG_EH_SUCCESS_CMD;
4949 ehi->dev_action[dev->devno] |= ATA_EH_GET_SUCCESS_SENSE;
4952 * set pending so that ata_qc_schedule_eh() does not
4953 * trigger fast drain, and freeze the port.
4955 ap->pflags |= ATA_PFLAG_EH_PENDING;
4956 ata_qc_schedule_eh(qc);
4960 /* Some commands need post-processing after successful
4963 switch (qc->tf.command) {
4964 case ATA_CMD_SET_FEATURES:
4965 if (qc->tf.feature != SETFEATURES_WC_ON &&
4966 qc->tf.feature != SETFEATURES_WC_OFF &&
4967 qc->tf.feature != SETFEATURES_RA_ON &&
4968 qc->tf.feature != SETFEATURES_RA_OFF)
4971 case ATA_CMD_INIT_DEV_PARAMS: /* CHS translation changed */
4972 case ATA_CMD_SET_MULTI: /* multi_count changed */
4973 /* revalidate device */
4974 ehi->dev_action[dev->devno] |= ATA_EH_REVALIDATE;
4975 ata_port_schedule_eh(ap);
4979 dev->flags |= ATA_DFLAG_SLEEPING;
4983 if (unlikely(dev->flags & ATA_DFLAG_DUBIOUS_XFER))
4984 ata_verify_xfer(qc);
4986 __ata_qc_complete(qc);
4988 if (qc->flags & ATA_QCFLAG_EH_SCHEDULED)
4991 /* read result TF if failed or requested */
4992 if (qc->err_mask || qc->flags & ATA_QCFLAG_RESULT_TF)
4995 __ata_qc_complete(qc);
4998 EXPORT_SYMBOL_GPL(ata_qc_complete);
5001 * ata_qc_get_active - get bitmask of active qcs
5002 * @ap: port in question
5005 * spin_lock_irqsave(host lock)
5008 * Bitmask of active qcs
5010 u64 ata_qc_get_active(struct ata_port *ap)
5012 u64 qc_active = ap->qc_active;
5014 /* ATA_TAG_INTERNAL is sent to hw as tag 0 */
5015 if (qc_active & (1ULL << ATA_TAG_INTERNAL)) {
5016 qc_active |= (1 << 0);
5017 qc_active &= ~(1ULL << ATA_TAG_INTERNAL);
5022 EXPORT_SYMBOL_GPL(ata_qc_get_active);
5025 * ata_qc_issue - issue taskfile to device
5026 * @qc: command to issue to device
5028 * Prepare an ATA command to submission to device.
5029 * This includes mapping the data into a DMA-able
5030 * area, filling in the S/G table, and finally
5031 * writing the taskfile to hardware, starting the command.
5034 * spin_lock_irqsave(host lock)
5036 void ata_qc_issue(struct ata_queued_cmd *qc)
5038 struct ata_port *ap = qc->ap;
5039 struct ata_link *link = qc->dev->link;
5040 u8 prot = qc->tf.protocol;
5042 /* Make sure only one non-NCQ command is outstanding. The
5043 * check is skipped for old EH because it reuses active qc to
5044 * request ATAPI sense.
5046 WARN_ON_ONCE(ap->ops->error_handler && ata_tag_valid(link->active_tag));
5048 if (ata_is_ncq(prot)) {
5049 WARN_ON_ONCE(link->sactive & (1 << qc->hw_tag));
5052 ap->nr_active_links++;
5053 link->sactive |= 1 << qc->hw_tag;
5055 WARN_ON_ONCE(link->sactive);
5057 ap->nr_active_links++;
5058 link->active_tag = qc->tag;
5061 qc->flags |= ATA_QCFLAG_ACTIVE;
5062 ap->qc_active |= 1ULL << qc->tag;
5065 * We guarantee to LLDs that they will have at least one
5066 * non-zero sg if the command is a data command.
5068 if (ata_is_data(prot) && (!qc->sg || !qc->n_elem || !qc->nbytes))
5071 if (ata_is_dma(prot) || (ata_is_pio(prot) &&
5072 (ap->flags & ATA_FLAG_PIO_DMA)))
5073 if (ata_sg_setup(qc))
5076 /* if device is sleeping, schedule reset and abort the link */
5077 if (unlikely(qc->dev->flags & ATA_DFLAG_SLEEPING)) {
5078 link->eh_info.action |= ATA_EH_RESET;
5079 ata_ehi_push_desc(&link->eh_info, "waking up from sleep");
5080 ata_link_abort(link);
5084 trace_ata_qc_prep(qc);
5085 qc->err_mask |= ap->ops->qc_prep(qc);
5086 if (unlikely(qc->err_mask))
5088 trace_ata_qc_issue(qc);
5089 qc->err_mask |= ap->ops->qc_issue(qc);
5090 if (unlikely(qc->err_mask))
5095 qc->err_mask |= AC_ERR_SYSTEM;
5097 ata_qc_complete(qc);
5101 * ata_phys_link_online - test whether the given link is online
5102 * @link: ATA link to test
5104 * Test whether @link is online. Note that this function returns
5105 * 0 if online status of @link cannot be obtained, so
5106 * ata_link_online(link) != !ata_link_offline(link).
5112 * True if the port online status is available and online.
5114 bool ata_phys_link_online(struct ata_link *link)
5118 if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0 &&
5119 ata_sstatus_online(sstatus))
5125 * ata_phys_link_offline - test whether the given link is offline
5126 * @link: ATA link to test
5128 * Test whether @link is offline. Note that this function
5129 * returns 0 if offline status of @link cannot be obtained, so
5130 * ata_link_online(link) != !ata_link_offline(link).
5136 * True if the port offline status is available and offline.
5138 bool ata_phys_link_offline(struct ata_link *link)
5142 if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0 &&
5143 !ata_sstatus_online(sstatus))
5149 * ata_link_online - test whether the given link is online
5150 * @link: ATA link to test
5152 * Test whether @link is online. This is identical to
5153 * ata_phys_link_online() when there's no slave link. When
5154 * there's a slave link, this function should only be called on
5155 * the master link and will return true if any of M/S links is
5162 * True if the port online status is available and online.
5164 bool ata_link_online(struct ata_link *link)
5166 struct ata_link *slave = link->ap->slave_link;
5168 WARN_ON(link == slave); /* shouldn't be called on slave link */
5170 return ata_phys_link_online(link) ||
5171 (slave && ata_phys_link_online(slave));
5173 EXPORT_SYMBOL_GPL(ata_link_online);
5176 * ata_link_offline - test whether the given link is offline
5177 * @link: ATA link to test
5179 * Test whether @link is offline. This is identical to
5180 * ata_phys_link_offline() when there's no slave link. When
5181 * there's a slave link, this function should only be called on
5182 * the master link and will return true if both M/S links are
5189 * True if the port offline status is available and offline.
5191 bool ata_link_offline(struct ata_link *link)
5193 struct ata_link *slave = link->ap->slave_link;
5195 WARN_ON(link == slave); /* shouldn't be called on slave link */
5197 return ata_phys_link_offline(link) &&
5198 (!slave || ata_phys_link_offline(slave));
5200 EXPORT_SYMBOL_GPL(ata_link_offline);
5203 static void ata_port_request_pm(struct ata_port *ap, pm_message_t mesg,
5204 unsigned int action, unsigned int ehi_flags,
5207 struct ata_link *link;
5208 unsigned long flags;
5210 /* Previous resume operation might still be in
5211 * progress. Wait for PM_PENDING to clear.
5213 if (ap->pflags & ATA_PFLAG_PM_PENDING) {
5214 ata_port_wait_eh(ap);
5215 WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING);
5218 /* request PM ops to EH */
5219 spin_lock_irqsave(ap->lock, flags);
5222 ap->pflags |= ATA_PFLAG_PM_PENDING;
5223 ata_for_each_link(link, ap, HOST_FIRST) {
5224 link->eh_info.action |= action;
5225 link->eh_info.flags |= ehi_flags;
5228 ata_port_schedule_eh(ap);
5230 spin_unlock_irqrestore(ap->lock, flags);
5233 ata_port_wait_eh(ap);
5234 WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING);
5239 * On some hardware, device fails to respond after spun down for suspend. As
5240 * the device won't be used before being resumed, we don't need to touch the
5241 * device. Ask EH to skip the usual stuff and proceed directly to suspend.
5243 * http://thread.gmane.org/gmane.linux.ide/46764
5245 static const unsigned int ata_port_suspend_ehi = ATA_EHI_QUIET
5246 | ATA_EHI_NO_AUTOPSY
5247 | ATA_EHI_NO_RECOVERY;
5249 static void ata_port_suspend(struct ata_port *ap, pm_message_t mesg)
5251 ata_port_request_pm(ap, mesg, 0, ata_port_suspend_ehi, false);
5254 static void ata_port_suspend_async(struct ata_port *ap, pm_message_t mesg)
5256 ata_port_request_pm(ap, mesg, 0, ata_port_suspend_ehi, true);
5259 static int ata_port_pm_suspend(struct device *dev)
5261 struct ata_port *ap = to_ata_port(dev);
5263 if (pm_runtime_suspended(dev))
5266 ata_port_suspend(ap, PMSG_SUSPEND);
5270 static int ata_port_pm_freeze(struct device *dev)
5272 struct ata_port *ap = to_ata_port(dev);
5274 if (pm_runtime_suspended(dev))
5277 ata_port_suspend(ap, PMSG_FREEZE);
5281 static int ata_port_pm_poweroff(struct device *dev)
5283 ata_port_suspend(to_ata_port(dev), PMSG_HIBERNATE);
5287 static const unsigned int ata_port_resume_ehi = ATA_EHI_NO_AUTOPSY
5290 static void ata_port_resume(struct ata_port *ap, pm_message_t mesg)
5292 ata_port_request_pm(ap, mesg, ATA_EH_RESET, ata_port_resume_ehi, false);
5295 static void ata_port_resume_async(struct ata_port *ap, pm_message_t mesg)
5297 ata_port_request_pm(ap, mesg, ATA_EH_RESET, ata_port_resume_ehi, true);
5300 static int ata_port_pm_resume(struct device *dev)
5302 ata_port_resume_async(to_ata_port(dev), PMSG_RESUME);
5303 pm_runtime_disable(dev);
5304 pm_runtime_set_active(dev);
5305 pm_runtime_enable(dev);
5310 * For ODDs, the upper layer will poll for media change every few seconds,
5311 * which will make it enter and leave suspend state every few seconds. And
5312 * as each suspend will cause a hard/soft reset, the gain of runtime suspend
5313 * is very little and the ODD may malfunction after constantly being reset.
5314 * So the idle callback here will not proceed to suspend if a non-ZPODD capable
5315 * ODD is attached to the port.
5317 static int ata_port_runtime_idle(struct device *dev)
5319 struct ata_port *ap = to_ata_port(dev);
5320 struct ata_link *link;
5321 struct ata_device *adev;
5323 ata_for_each_link(link, ap, HOST_FIRST) {
5324 ata_for_each_dev(adev, link, ENABLED)
5325 if (adev->class == ATA_DEV_ATAPI &&
5326 !zpodd_dev_enabled(adev))
5333 static int ata_port_runtime_suspend(struct device *dev)
5335 ata_port_suspend(to_ata_port(dev), PMSG_AUTO_SUSPEND);
5339 static int ata_port_runtime_resume(struct device *dev)
5341 ata_port_resume(to_ata_port(dev), PMSG_AUTO_RESUME);
5345 static const struct dev_pm_ops ata_port_pm_ops = {
5346 .suspend = ata_port_pm_suspend,
5347 .resume = ata_port_pm_resume,
5348 .freeze = ata_port_pm_freeze,
5349 .thaw = ata_port_pm_resume,
5350 .poweroff = ata_port_pm_poweroff,
5351 .restore = ata_port_pm_resume,
5353 .runtime_suspend = ata_port_runtime_suspend,
5354 .runtime_resume = ata_port_runtime_resume,
5355 .runtime_idle = ata_port_runtime_idle,
5358 /* sas ports don't participate in pm runtime management of ata_ports,
5359 * and need to resume ata devices at the domain level, not the per-port
5360 * level. sas suspend/resume is async to allow parallel port recovery
5361 * since sas has multiple ata_port instances per Scsi_Host.
5363 void ata_sas_port_suspend(struct ata_port *ap)
5365 ata_port_suspend_async(ap, PMSG_SUSPEND);
5367 EXPORT_SYMBOL_GPL(ata_sas_port_suspend);
5369 void ata_sas_port_resume(struct ata_port *ap)
5371 ata_port_resume_async(ap, PMSG_RESUME);
5373 EXPORT_SYMBOL_GPL(ata_sas_port_resume);
5376 * ata_host_suspend - suspend host
5377 * @host: host to suspend
5380 * Suspend @host. Actual operation is performed by port suspend.
5382 void ata_host_suspend(struct ata_host *host, pm_message_t mesg)
5384 host->dev->power.power_state = mesg;
5386 EXPORT_SYMBOL_GPL(ata_host_suspend);
5389 * ata_host_resume - resume host
5390 * @host: host to resume
5392 * Resume @host. Actual operation is performed by port resume.
5394 void ata_host_resume(struct ata_host *host)
5396 host->dev->power.power_state = PMSG_ON;
5398 EXPORT_SYMBOL_GPL(ata_host_resume);
5401 const struct device_type ata_port_type = {
5404 .pm = &ata_port_pm_ops,
5409 * ata_dev_init - Initialize an ata_device structure
5410 * @dev: Device structure to initialize
5412 * Initialize @dev in preparation for probing.
5415 * Inherited from caller.
5417 void ata_dev_init(struct ata_device *dev)
5419 struct ata_link *link = ata_dev_phys_link(dev);
5420 struct ata_port *ap = link->ap;
5421 unsigned long flags;
5423 /* SATA spd limit is bound to the attached device, reset together */
5424 link->sata_spd_limit = link->hw_sata_spd_limit;
5427 /* High bits of dev->flags are used to record warm plug
5428 * requests which occur asynchronously. Synchronize using
5431 spin_lock_irqsave(ap->lock, flags);
5432 dev->flags &= ~ATA_DFLAG_INIT_MASK;
5434 spin_unlock_irqrestore(ap->lock, flags);
5436 memset((void *)dev + ATA_DEVICE_CLEAR_BEGIN, 0,
5437 ATA_DEVICE_CLEAR_END - ATA_DEVICE_CLEAR_BEGIN);
5438 dev->pio_mask = UINT_MAX;
5439 dev->mwdma_mask = UINT_MAX;
5440 dev->udma_mask = UINT_MAX;
5444 * ata_link_init - Initialize an ata_link structure
5445 * @ap: ATA port link is attached to
5446 * @link: Link structure to initialize
5447 * @pmp: Port multiplier port number
5452 * Kernel thread context (may sleep)
5454 void ata_link_init(struct ata_port *ap, struct ata_link *link, int pmp)
5458 /* clear everything except for devices */
5459 memset((void *)link + ATA_LINK_CLEAR_BEGIN, 0,
5460 ATA_LINK_CLEAR_END - ATA_LINK_CLEAR_BEGIN);
5464 link->active_tag = ATA_TAG_POISON;
5465 link->hw_sata_spd_limit = UINT_MAX;
5467 /* can't use iterator, ap isn't initialized yet */
5468 for (i = 0; i < ATA_MAX_DEVICES; i++) {
5469 struct ata_device *dev = &link->device[i];
5472 dev->devno = dev - link->device;
5473 #ifdef CONFIG_ATA_ACPI
5474 dev->gtf_filter = ata_acpi_gtf_filter;
5481 * sata_link_init_spd - Initialize link->sata_spd_limit
5482 * @link: Link to configure sata_spd_limit for
5484 * Initialize ``link->[hw_]sata_spd_limit`` to the currently
5488 * Kernel thread context (may sleep).
5491 * 0 on success, -errno on failure.
5493 int sata_link_init_spd(struct ata_link *link)
5498 rc = sata_scr_read(link, SCR_CONTROL, &link->saved_scontrol);
5502 spd = (link->saved_scontrol >> 4) & 0xf;
5504 link->hw_sata_spd_limit &= (1 << spd) - 1;
5506 ata_force_link_limits(link);
5508 link->sata_spd_limit = link->hw_sata_spd_limit;
5514 * ata_port_alloc - allocate and initialize basic ATA port resources
5515 * @host: ATA host this allocated port belongs to
5517 * Allocate and initialize basic ATA port resources.
5520 * Allocate ATA port on success, NULL on failure.
5523 * Inherited from calling layer (may sleep).
5525 struct ata_port *ata_port_alloc(struct ata_host *host)
5527 struct ata_port *ap;
5529 ap = kzalloc(sizeof(*ap), GFP_KERNEL);
5533 ap->pflags |= ATA_PFLAG_INITIALIZING | ATA_PFLAG_FROZEN;
5534 ap->lock = &host->lock;
5536 ap->local_port_no = -1;
5538 ap->dev = host->dev;
5540 mutex_init(&ap->scsi_scan_mutex);
5541 INIT_DELAYED_WORK(&ap->hotplug_task, ata_scsi_hotplug);
5542 INIT_DELAYED_WORK(&ap->scsi_rescan_task, ata_scsi_dev_rescan);
5543 INIT_LIST_HEAD(&ap->eh_done_q);
5544 init_waitqueue_head(&ap->eh_wait_q);
5545 init_completion(&ap->park_req_pending);
5546 timer_setup(&ap->fastdrain_timer, ata_eh_fastdrain_timerfn,
5549 ap->cbl = ATA_CBL_NONE;
5551 ata_link_init(ap, &ap->link, 0);
5554 ap->stats.unhandled_irq = 1;
5555 ap->stats.idle_irq = 1;
5557 ata_sff_port_init(ap);
5562 static void ata_devres_release(struct device *gendev, void *res)
5564 struct ata_host *host = dev_get_drvdata(gendev);
5567 for (i = 0; i < host->n_ports; i++) {
5568 struct ata_port *ap = host->ports[i];
5574 scsi_host_put(ap->scsi_host);
5578 dev_set_drvdata(gendev, NULL);
5582 static void ata_host_release(struct kref *kref)
5584 struct ata_host *host = container_of(kref, struct ata_host, kref);
5587 for (i = 0; i < host->n_ports; i++) {
5588 struct ata_port *ap = host->ports[i];
5590 kfree(ap->pmp_link);
5591 kfree(ap->slave_link);
5592 kfree(ap->ncq_sense_buf);
5594 host->ports[i] = NULL;
5599 void ata_host_get(struct ata_host *host)
5601 kref_get(&host->kref);
5604 void ata_host_put(struct ata_host *host)
5606 kref_put(&host->kref, ata_host_release);
5608 EXPORT_SYMBOL_GPL(ata_host_put);
5611 * ata_host_alloc - allocate and init basic ATA host resources
5612 * @dev: generic device this host is associated with
5613 * @max_ports: maximum number of ATA ports associated with this host
5615 * Allocate and initialize basic ATA host resources. LLD calls
5616 * this function to allocate a host, initializes it fully and
5617 * attaches it using ata_host_register().
5619 * @max_ports ports are allocated and host->n_ports is
5620 * initialized to @max_ports. The caller is allowed to decrease
5621 * host->n_ports before calling ata_host_register(). The unused
5622 * ports will be automatically freed on registration.
5625 * Allocate ATA host on success, NULL on failure.
5628 * Inherited from calling layer (may sleep).
5630 struct ata_host *ata_host_alloc(struct device *dev, int max_ports)
5632 struct ata_host *host;
5637 /* alloc a container for our list of ATA ports (buses) */
5638 sz = sizeof(struct ata_host) + (max_ports + 1) * sizeof(void *);
5639 host = kzalloc(sz, GFP_KERNEL);
5643 if (!devres_open_group(dev, NULL, GFP_KERNEL))
5646 dr = devres_alloc(ata_devres_release, 0, GFP_KERNEL);
5650 devres_add(dev, dr);
5651 dev_set_drvdata(dev, host);
5653 spin_lock_init(&host->lock);
5654 mutex_init(&host->eh_mutex);
5656 host->n_ports = max_ports;
5657 kref_init(&host->kref);
5659 /* allocate ports bound to this host */
5660 for (i = 0; i < max_ports; i++) {
5661 struct ata_port *ap;
5663 ap = ata_port_alloc(host);
5668 host->ports[i] = ap;
5671 devres_remove_group(dev, NULL);
5675 devres_release_group(dev, NULL);
5680 EXPORT_SYMBOL_GPL(ata_host_alloc);
5683 * ata_host_alloc_pinfo - alloc host and init with port_info array
5684 * @dev: generic device this host is associated with
5685 * @ppi: array of ATA port_info to initialize host with
5686 * @n_ports: number of ATA ports attached to this host
5688 * Allocate ATA host and initialize with info from @ppi. If NULL
5689 * terminated, @ppi may contain fewer entries than @n_ports. The
5690 * last entry will be used for the remaining ports.
5693 * Allocate ATA host on success, NULL on failure.
5696 * Inherited from calling layer (may sleep).
5698 struct ata_host *ata_host_alloc_pinfo(struct device *dev,
5699 const struct ata_port_info * const * ppi,
5702 const struct ata_port_info *pi = &ata_dummy_port_info;
5703 struct ata_host *host;
5706 host = ata_host_alloc(dev, n_ports);
5710 for (i = 0, j = 0; i < host->n_ports; i++) {
5711 struct ata_port *ap = host->ports[i];
5716 ap->pio_mask = pi->pio_mask;
5717 ap->mwdma_mask = pi->mwdma_mask;
5718 ap->udma_mask = pi->udma_mask;
5719 ap->flags |= pi->flags;
5720 ap->link.flags |= pi->link_flags;
5721 ap->ops = pi->port_ops;
5723 if (!host->ops && (pi->port_ops != &ata_dummy_port_ops))
5724 host->ops = pi->port_ops;
5729 EXPORT_SYMBOL_GPL(ata_host_alloc_pinfo);
5731 static void ata_host_stop(struct device *gendev, void *res)
5733 struct ata_host *host = dev_get_drvdata(gendev);
5736 WARN_ON(!(host->flags & ATA_HOST_STARTED));
5738 for (i = 0; i < host->n_ports; i++) {
5739 struct ata_port *ap = host->ports[i];
5741 if (ap->ops->port_stop)
5742 ap->ops->port_stop(ap);
5745 if (host->ops->host_stop)
5746 host->ops->host_stop(host);
5750 * ata_finalize_port_ops - finalize ata_port_operations
5751 * @ops: ata_port_operations to finalize
5753 * An ata_port_operations can inherit from another ops and that
5754 * ops can again inherit from another. This can go on as many
5755 * times as necessary as long as there is no loop in the
5756 * inheritance chain.
5758 * Ops tables are finalized when the host is started. NULL or
5759 * unspecified entries are inherited from the closet ancestor
5760 * which has the method and the entry is populated with it.
5761 * After finalization, the ops table directly points to all the
5762 * methods and ->inherits is no longer necessary and cleared.
5764 * Using ATA_OP_NULL, inheriting ops can force a method to NULL.
5769 static void ata_finalize_port_ops(struct ata_port_operations *ops)
5771 static DEFINE_SPINLOCK(lock);
5772 const struct ata_port_operations *cur;
5773 void **begin = (void **)ops;
5774 void **end = (void **)&ops->inherits;
5777 if (!ops || !ops->inherits)
5782 for (cur = ops->inherits; cur; cur = cur->inherits) {
5783 void **inherit = (void **)cur;
5785 for (pp = begin; pp < end; pp++, inherit++)
5790 for (pp = begin; pp < end; pp++)
5794 ops->inherits = NULL;
5800 * ata_host_start - start and freeze ports of an ATA host
5801 * @host: ATA host to start ports for
5803 * Start and then freeze ports of @host. Started status is
5804 * recorded in host->flags, so this function can be called
5805 * multiple times. Ports are guaranteed to get started only
5806 * once. If host->ops is not initialized yet, it is set to the
5807 * first non-dummy port ops.
5810 * Inherited from calling layer (may sleep).
5813 * 0 if all ports are started successfully, -errno otherwise.
5815 int ata_host_start(struct ata_host *host)
5818 void *start_dr = NULL;
5821 if (host->flags & ATA_HOST_STARTED)
5824 ata_finalize_port_ops(host->ops);
5826 for (i = 0; i < host->n_ports; i++) {
5827 struct ata_port *ap = host->ports[i];
5829 ata_finalize_port_ops(ap->ops);
5831 if (!host->ops && !ata_port_is_dummy(ap))
5832 host->ops = ap->ops;
5834 if (ap->ops->port_stop)
5838 if (host->ops && host->ops->host_stop)
5842 start_dr = devres_alloc(ata_host_stop, 0, GFP_KERNEL);
5847 for (i = 0; i < host->n_ports; i++) {
5848 struct ata_port *ap = host->ports[i];
5850 if (ap->ops->port_start) {
5851 rc = ap->ops->port_start(ap);
5855 "failed to start port %d (errno=%d)\n",
5860 ata_eh_freeze_port(ap);
5864 devres_add(host->dev, start_dr);
5865 host->flags |= ATA_HOST_STARTED;
5870 struct ata_port *ap = host->ports[i];
5872 if (ap->ops->port_stop)
5873 ap->ops->port_stop(ap);
5875 devres_free(start_dr);
5878 EXPORT_SYMBOL_GPL(ata_host_start);
5881 * ata_host_init - Initialize a host struct for sas (ipr, libsas)
5882 * @host: host to initialize
5883 * @dev: device host is attached to
5887 void ata_host_init(struct ata_host *host, struct device *dev,
5888 struct ata_port_operations *ops)
5890 spin_lock_init(&host->lock);
5891 mutex_init(&host->eh_mutex);
5892 host->n_tags = ATA_MAX_QUEUE;
5895 kref_init(&host->kref);
5897 EXPORT_SYMBOL_GPL(ata_host_init);
5899 void __ata_port_probe(struct ata_port *ap)
5901 struct ata_eh_info *ehi = &ap->link.eh_info;
5902 unsigned long flags;
5904 /* kick EH for boot probing */
5905 spin_lock_irqsave(ap->lock, flags);
5907 ehi->probe_mask |= ATA_ALL_DEVICES;
5908 ehi->action |= ATA_EH_RESET;
5909 ehi->flags |= ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET;
5911 ap->pflags &= ~ATA_PFLAG_INITIALIZING;
5912 ap->pflags |= ATA_PFLAG_LOADING;
5913 ata_port_schedule_eh(ap);
5915 spin_unlock_irqrestore(ap->lock, flags);
5918 int ata_port_probe(struct ata_port *ap)
5922 if (ap->ops->error_handler) {
5923 __ata_port_probe(ap);
5924 ata_port_wait_eh(ap);
5926 rc = ata_bus_probe(ap);
5932 static void async_port_probe(void *data, async_cookie_t cookie)
5934 struct ata_port *ap = data;
5937 * If we're not allowed to scan this host in parallel,
5938 * we need to wait until all previous scans have completed
5939 * before going further.
5940 * Jeff Garzik says this is only within a controller, so we
5941 * don't need to wait for port 0, only for later ports.
5943 if (!(ap->host->flags & ATA_HOST_PARALLEL_SCAN) && ap->port_no != 0)
5944 async_synchronize_cookie(cookie);
5946 (void)ata_port_probe(ap);
5948 /* in order to keep device order, we need to synchronize at this point */
5949 async_synchronize_cookie(cookie);
5951 ata_scsi_scan_host(ap, 1);
5955 * ata_host_register - register initialized ATA host
5956 * @host: ATA host to register
5957 * @sht: template for SCSI host
5959 * Register initialized ATA host. @host is allocated using
5960 * ata_host_alloc() and fully initialized by LLD. This function
5961 * starts ports, registers @host with ATA and SCSI layers and
5962 * probe registered devices.
5965 * Inherited from calling layer (may sleep).
5968 * 0 on success, -errno otherwise.
5970 int ata_host_register(struct ata_host *host, const struct scsi_host_template *sht)
5974 host->n_tags = clamp(sht->can_queue, 1, ATA_MAX_QUEUE);
5976 /* host must have been started */
5977 if (!(host->flags & ATA_HOST_STARTED)) {
5978 dev_err(host->dev, "BUG: trying to register unstarted host\n");
5983 /* Blow away unused ports. This happens when LLD can't
5984 * determine the exact number of ports to allocate at
5987 for (i = host->n_ports; host->ports[i]; i++)
5988 kfree(host->ports[i]);
5990 /* give ports names and add SCSI hosts */
5991 for (i = 0; i < host->n_ports; i++) {
5992 host->ports[i]->print_id = atomic_inc_return(&ata_print_id);
5993 host->ports[i]->local_port_no = i + 1;
5996 /* Create associated sysfs transport objects */
5997 for (i = 0; i < host->n_ports; i++) {
5998 rc = ata_tport_add(host->dev,host->ports[i]);
6004 rc = ata_scsi_add_hosts(host, sht);
6008 /* set cable, sata_spd_limit and report */
6009 for (i = 0; i < host->n_ports; i++) {
6010 struct ata_port *ap = host->ports[i];
6011 unsigned int xfer_mask;
6013 /* set SATA cable type if still unset */
6014 if (ap->cbl == ATA_CBL_NONE && (ap->flags & ATA_FLAG_SATA))
6015 ap->cbl = ATA_CBL_SATA;
6017 /* init sata_spd_limit to the current value */
6018 sata_link_init_spd(&ap->link);
6020 sata_link_init_spd(ap->slave_link);
6022 /* print per-port info to dmesg */
6023 xfer_mask = ata_pack_xfermask(ap->pio_mask, ap->mwdma_mask,
6026 if (!ata_port_is_dummy(ap)) {
6027 ata_port_info(ap, "%cATA max %s %s\n",
6028 (ap->flags & ATA_FLAG_SATA) ? 'S' : 'P',
6029 ata_mode_string(xfer_mask),
6030 ap->link.eh_info.desc);
6031 ata_ehi_clear_desc(&ap->link.eh_info);
6033 ata_port_info(ap, "DUMMY\n");
6036 /* perform each probe asynchronously */
6037 for (i = 0; i < host->n_ports; i++) {
6038 struct ata_port *ap = host->ports[i];
6039 ap->cookie = async_schedule(async_port_probe, ap);
6046 ata_tport_delete(host->ports[i]);
6051 EXPORT_SYMBOL_GPL(ata_host_register);
6054 * ata_host_activate - start host, request IRQ and register it
6055 * @host: target ATA host
6056 * @irq: IRQ to request
6057 * @irq_handler: irq_handler used when requesting IRQ
6058 * @irq_flags: irq_flags used when requesting IRQ
6059 * @sht: scsi_host_template to use when registering the host
6061 * After allocating an ATA host and initializing it, most libata
6062 * LLDs perform three steps to activate the host - start host,
6063 * request IRQ and register it. This helper takes necessary
6064 * arguments and performs the three steps in one go.
6066 * An invalid IRQ skips the IRQ registration and expects the host to
6067 * have set polling mode on the port. In this case, @irq_handler
6071 * Inherited from calling layer (may sleep).
6074 * 0 on success, -errno otherwise.
6076 int ata_host_activate(struct ata_host *host, int irq,
6077 irq_handler_t irq_handler, unsigned long irq_flags,
6078 const struct scsi_host_template *sht)
6083 rc = ata_host_start(host);
6087 /* Special case for polling mode */
6089 WARN_ON(irq_handler);
6090 return ata_host_register(host, sht);
6093 irq_desc = devm_kasprintf(host->dev, GFP_KERNEL, "%s[%s]",
6094 dev_driver_string(host->dev),
6095 dev_name(host->dev));
6099 rc = devm_request_irq(host->dev, irq, irq_handler, irq_flags,
6104 for (i = 0; i < host->n_ports; i++)
6105 ata_port_desc(host->ports[i], "irq %d", irq);
6107 rc = ata_host_register(host, sht);
6108 /* if failed, just free the IRQ and leave ports alone */
6110 devm_free_irq(host->dev, irq, host);
6114 EXPORT_SYMBOL_GPL(ata_host_activate);
6117 * ata_port_detach - Detach ATA port in preparation of device removal
6118 * @ap: ATA port to be detached
6120 * Detach all ATA devices and the associated SCSI devices of @ap;
6121 * then, remove the associated SCSI host. @ap is guaranteed to
6122 * be quiescent on return from this function.
6125 * Kernel thread context (may sleep).
6127 static void ata_port_detach(struct ata_port *ap)
6129 unsigned long flags;
6130 struct ata_link *link;
6131 struct ata_device *dev;
6133 if (!ap->ops->error_handler)
6136 /* tell EH we're leaving & flush EH */
6137 spin_lock_irqsave(ap->lock, flags);
6138 ap->pflags |= ATA_PFLAG_UNLOADING;
6139 ata_port_schedule_eh(ap);
6140 spin_unlock_irqrestore(ap->lock, flags);
6142 /* wait till EH commits suicide */
6143 ata_port_wait_eh(ap);
6145 /* it better be dead now */
6146 WARN_ON(!(ap->pflags & ATA_PFLAG_UNLOADED));
6148 cancel_delayed_work_sync(&ap->hotplug_task);
6149 cancel_delayed_work_sync(&ap->scsi_rescan_task);
6152 /* clean up zpodd on port removal */
6153 ata_for_each_link(link, ap, HOST_FIRST) {
6154 ata_for_each_dev(dev, link, ALL) {
6155 if (zpodd_dev_enabled(dev))
6161 for (i = 0; i < SATA_PMP_MAX_PORTS; i++)
6162 ata_tlink_delete(&ap->pmp_link[i]);
6164 /* remove the associated SCSI host */
6165 scsi_remove_host(ap->scsi_host);
6166 ata_tport_delete(ap);
6170 * ata_host_detach - Detach all ports of an ATA host
6171 * @host: Host to detach
6173 * Detach all ports of @host.
6176 * Kernel thread context (may sleep).
6178 void ata_host_detach(struct ata_host *host)
6182 for (i = 0; i < host->n_ports; i++) {
6183 /* Ensure ata_port probe has completed */
6184 async_synchronize_cookie(host->ports[i]->cookie + 1);
6185 ata_port_detach(host->ports[i]);
6188 /* the host is dead now, dissociate ACPI */
6189 ata_acpi_dissociate(host);
6191 EXPORT_SYMBOL_GPL(ata_host_detach);
6196 * ata_pci_remove_one - PCI layer callback for device removal
6197 * @pdev: PCI device that was removed
6199 * PCI layer indicates to libata via this hook that hot-unplug or
6200 * module unload event has occurred. Detach all ports. Resource
6201 * release is handled via devres.
6204 * Inherited from PCI layer (may sleep).
6206 void ata_pci_remove_one(struct pci_dev *pdev)
6208 struct ata_host *host = pci_get_drvdata(pdev);
6210 ata_host_detach(host);
6212 EXPORT_SYMBOL_GPL(ata_pci_remove_one);
6214 void ata_pci_shutdown_one(struct pci_dev *pdev)
6216 struct ata_host *host = pci_get_drvdata(pdev);
6219 for (i = 0; i < host->n_ports; i++) {
6220 struct ata_port *ap = host->ports[i];
6222 ap->pflags |= ATA_PFLAG_FROZEN;
6224 /* Disable port interrupts */
6225 if (ap->ops->freeze)
6226 ap->ops->freeze(ap);
6228 /* Stop the port DMA engines */
6229 if (ap->ops->port_stop)
6230 ap->ops->port_stop(ap);
6233 EXPORT_SYMBOL_GPL(ata_pci_shutdown_one);
6235 /* move to PCI subsystem */
6236 int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits)
6238 unsigned long tmp = 0;
6240 switch (bits->width) {
6243 pci_read_config_byte(pdev, bits->reg, &tmp8);
6249 pci_read_config_word(pdev, bits->reg, &tmp16);
6255 pci_read_config_dword(pdev, bits->reg, &tmp32);
6266 return (tmp == bits->val) ? 1 : 0;
6268 EXPORT_SYMBOL_GPL(pci_test_config_bits);
6271 void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg)
6273 pci_save_state(pdev);
6274 pci_disable_device(pdev);
6276 if (mesg.event & PM_EVENT_SLEEP)
6277 pci_set_power_state(pdev, PCI_D3hot);
6279 EXPORT_SYMBOL_GPL(ata_pci_device_do_suspend);
6281 int ata_pci_device_do_resume(struct pci_dev *pdev)
6285 pci_set_power_state(pdev, PCI_D0);
6286 pci_restore_state(pdev);
6288 rc = pcim_enable_device(pdev);
6291 "failed to enable device after resume (%d)\n", rc);
6295 pci_set_master(pdev);
6298 EXPORT_SYMBOL_GPL(ata_pci_device_do_resume);
6300 int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg)
6302 struct ata_host *host = pci_get_drvdata(pdev);
6304 ata_host_suspend(host, mesg);
6306 ata_pci_device_do_suspend(pdev, mesg);
6310 EXPORT_SYMBOL_GPL(ata_pci_device_suspend);
6312 int ata_pci_device_resume(struct pci_dev *pdev)
6314 struct ata_host *host = pci_get_drvdata(pdev);
6317 rc = ata_pci_device_do_resume(pdev);
6319 ata_host_resume(host);
6322 EXPORT_SYMBOL_GPL(ata_pci_device_resume);
6323 #endif /* CONFIG_PM */
6324 #endif /* CONFIG_PCI */
6327 * ata_platform_remove_one - Platform layer callback for device removal
6328 * @pdev: Platform device that was removed
6330 * Platform layer indicates to libata via this hook that hot-unplug or
6331 * module unload event has occurred. Detach all ports. Resource
6332 * release is handled via devres.
6335 * Inherited from platform layer (may sleep).
6337 void ata_platform_remove_one(struct platform_device *pdev)
6339 struct ata_host *host = platform_get_drvdata(pdev);
6341 ata_host_detach(host);
6343 EXPORT_SYMBOL_GPL(ata_platform_remove_one);
6345 #ifdef CONFIG_ATA_FORCE
6347 #define force_cbl(name, flag) \
6348 { #name, .cbl = (flag) }
6350 #define force_spd_limit(spd, val) \
6351 { #spd, .spd_limit = (val) }
6353 #define force_xfer(mode, shift) \
6354 { #mode, .xfer_mask = (1UL << (shift)) }
6356 #define force_lflag_on(name, flags) \
6357 { #name, .lflags_on = (flags) }
6359 #define force_lflag_onoff(name, flags) \
6360 { "no" #name, .lflags_on = (flags) }, \
6361 { #name, .lflags_off = (flags) }
6363 #define force_horkage_on(name, flag) \
6364 { #name, .horkage_on = (flag) }
6366 #define force_horkage_onoff(name, flag) \
6367 { "no" #name, .horkage_on = (flag) }, \
6368 { #name, .horkage_off = (flag) }
6370 static const struct ata_force_param force_tbl[] __initconst = {
6371 force_cbl(40c, ATA_CBL_PATA40),
6372 force_cbl(80c, ATA_CBL_PATA80),
6373 force_cbl(short40c, ATA_CBL_PATA40_SHORT),
6374 force_cbl(unk, ATA_CBL_PATA_UNK),
6375 force_cbl(ign, ATA_CBL_PATA_IGN),
6376 force_cbl(sata, ATA_CBL_SATA),
6378 force_spd_limit(1.5Gbps, 1),
6379 force_spd_limit(3.0Gbps, 2),
6381 force_xfer(pio0, ATA_SHIFT_PIO + 0),
6382 force_xfer(pio1, ATA_SHIFT_PIO + 1),
6383 force_xfer(pio2, ATA_SHIFT_PIO + 2),
6384 force_xfer(pio3, ATA_SHIFT_PIO + 3),
6385 force_xfer(pio4, ATA_SHIFT_PIO + 4),
6386 force_xfer(pio5, ATA_SHIFT_PIO + 5),
6387 force_xfer(pio6, ATA_SHIFT_PIO + 6),
6388 force_xfer(mwdma0, ATA_SHIFT_MWDMA + 0),
6389 force_xfer(mwdma1, ATA_SHIFT_MWDMA + 1),
6390 force_xfer(mwdma2, ATA_SHIFT_MWDMA + 2),
6391 force_xfer(mwdma3, ATA_SHIFT_MWDMA + 3),
6392 force_xfer(mwdma4, ATA_SHIFT_MWDMA + 4),
6393 force_xfer(udma0, ATA_SHIFT_UDMA + 0),
6394 force_xfer(udma16, ATA_SHIFT_UDMA + 0),
6395 force_xfer(udma/16, ATA_SHIFT_UDMA + 0),
6396 force_xfer(udma1, ATA_SHIFT_UDMA + 1),
6397 force_xfer(udma25, ATA_SHIFT_UDMA + 1),
6398 force_xfer(udma/25, ATA_SHIFT_UDMA + 1),
6399 force_xfer(udma2, ATA_SHIFT_UDMA + 2),
6400 force_xfer(udma33, ATA_SHIFT_UDMA + 2),
6401 force_xfer(udma/33, ATA_SHIFT_UDMA + 2),
6402 force_xfer(udma3, ATA_SHIFT_UDMA + 3),
6403 force_xfer(udma44, ATA_SHIFT_UDMA + 3),
6404 force_xfer(udma/44, ATA_SHIFT_UDMA + 3),
6405 force_xfer(udma4, ATA_SHIFT_UDMA + 4),
6406 force_xfer(udma66, ATA_SHIFT_UDMA + 4),
6407 force_xfer(udma/66, ATA_SHIFT_UDMA + 4),
6408 force_xfer(udma5, ATA_SHIFT_UDMA + 5),
6409 force_xfer(udma100, ATA_SHIFT_UDMA + 5),
6410 force_xfer(udma/100, ATA_SHIFT_UDMA + 5),
6411 force_xfer(udma6, ATA_SHIFT_UDMA + 6),
6412 force_xfer(udma133, ATA_SHIFT_UDMA + 6),
6413 force_xfer(udma/133, ATA_SHIFT_UDMA + 6),
6414 force_xfer(udma7, ATA_SHIFT_UDMA + 7),
6416 force_lflag_on(nohrst, ATA_LFLAG_NO_HRST),
6417 force_lflag_on(nosrst, ATA_LFLAG_NO_SRST),
6418 force_lflag_on(norst, ATA_LFLAG_NO_HRST | ATA_LFLAG_NO_SRST),
6419 force_lflag_on(rstonce, ATA_LFLAG_RST_ONCE),
6420 force_lflag_onoff(dbdelay, ATA_LFLAG_NO_DEBOUNCE_DELAY),
6422 force_horkage_onoff(ncq, ATA_HORKAGE_NONCQ),
6423 force_horkage_onoff(ncqtrim, ATA_HORKAGE_NO_NCQ_TRIM),
6424 force_horkage_onoff(ncqati, ATA_HORKAGE_NO_NCQ_ON_ATI),
6426 force_horkage_onoff(trim, ATA_HORKAGE_NOTRIM),
6427 force_horkage_on(trim_zero, ATA_HORKAGE_ZERO_AFTER_TRIM),
6428 force_horkage_on(max_trim_128m, ATA_HORKAGE_MAX_TRIM_128M),
6430 force_horkage_onoff(dma, ATA_HORKAGE_NODMA),
6431 force_horkage_on(atapi_dmadir, ATA_HORKAGE_ATAPI_DMADIR),
6432 force_horkage_on(atapi_mod16_dma, ATA_HORKAGE_ATAPI_MOD16_DMA),
6434 force_horkage_onoff(dmalog, ATA_HORKAGE_NO_DMA_LOG),
6435 force_horkage_onoff(iddevlog, ATA_HORKAGE_NO_ID_DEV_LOG),
6436 force_horkage_onoff(logdir, ATA_HORKAGE_NO_LOG_DIR),
6438 force_horkage_on(max_sec_128, ATA_HORKAGE_MAX_SEC_128),
6439 force_horkage_on(max_sec_1024, ATA_HORKAGE_MAX_SEC_1024),
6440 force_horkage_on(max_sec_lba48, ATA_HORKAGE_MAX_SEC_LBA48),
6442 force_horkage_onoff(lpm, ATA_HORKAGE_NOLPM),
6443 force_horkage_onoff(setxfer, ATA_HORKAGE_NOSETXFER),
6444 force_horkage_on(dump_id, ATA_HORKAGE_DUMP_ID),
6445 force_horkage_onoff(fua, ATA_HORKAGE_NO_FUA),
6447 force_horkage_on(disable, ATA_HORKAGE_DISABLE),
6450 static int __init ata_parse_force_one(char **cur,
6451 struct ata_force_ent *force_ent,
6452 const char **reason)
6454 char *start = *cur, *p = *cur;
6455 char *id, *val, *endp;
6456 const struct ata_force_param *match_fp = NULL;
6457 int nr_matches = 0, i;
6459 /* find where this param ends and update *cur */
6460 while (*p != '\0' && *p != ',')
6471 p = strchr(start, ':');
6473 val = strstrip(start);
6478 id = strstrip(start);
6479 val = strstrip(p + 1);
6482 p = strchr(id, '.');
6485 force_ent->device = simple_strtoul(p, &endp, 10);
6486 if (p == endp || *endp != '\0') {
6487 *reason = "invalid device";
6492 force_ent->port = simple_strtoul(id, &endp, 10);
6493 if (id == endp || *endp != '\0') {
6494 *reason = "invalid port/link";
6499 /* parse val, allow shortcuts so that both 1.5 and 1.5Gbps work */
6500 for (i = 0; i < ARRAY_SIZE(force_tbl); i++) {
6501 const struct ata_force_param *fp = &force_tbl[i];
6503 if (strncasecmp(val, fp->name, strlen(val)))
6509 if (strcasecmp(val, fp->name) == 0) {
6516 *reason = "unknown value";
6519 if (nr_matches > 1) {
6520 *reason = "ambiguous value";
6524 force_ent->param = *match_fp;
6529 static void __init ata_parse_force_param(void)
6531 int idx = 0, size = 1;
6532 int last_port = -1, last_device = -1;
6533 char *p, *cur, *next;
6535 /* Calculate maximum number of params and allocate ata_force_tbl */
6536 for (p = ata_force_param_buf; *p; p++)
6540 ata_force_tbl = kcalloc(size, sizeof(ata_force_tbl[0]), GFP_KERNEL);
6541 if (!ata_force_tbl) {
6542 printk(KERN_WARNING "ata: failed to extend force table, "
6543 "libata.force ignored\n");
6547 /* parse and populate the table */
6548 for (cur = ata_force_param_buf; *cur != '\0'; cur = next) {
6549 const char *reason = "";
6550 struct ata_force_ent te = { .port = -1, .device = -1 };
6553 if (ata_parse_force_one(&next, &te, &reason)) {
6554 printk(KERN_WARNING "ata: failed to parse force "
6555 "parameter \"%s\" (%s)\n",
6560 if (te.port == -1) {
6561 te.port = last_port;
6562 te.device = last_device;
6565 ata_force_tbl[idx++] = te;
6567 last_port = te.port;
6568 last_device = te.device;
6571 ata_force_tbl_size = idx;
6574 static void ata_free_force_param(void)
6576 kfree(ata_force_tbl);
6579 static inline void ata_parse_force_param(void) { }
6580 static inline void ata_free_force_param(void) { }
6583 static int __init ata_init(void)
6587 ata_parse_force_param();
6589 rc = ata_sff_init();
6591 ata_free_force_param();
6595 libata_transport_init();
6596 ata_scsi_transport_template = ata_attach_transport();
6597 if (!ata_scsi_transport_template) {
6603 printk(KERN_DEBUG "libata version " DRV_VERSION " loaded.\n");
6610 static void __exit ata_exit(void)
6612 ata_release_transport(ata_scsi_transport_template);
6613 libata_transport_exit();
6615 ata_free_force_param();
6618 subsys_initcall(ata_init);
6619 module_exit(ata_exit);
6621 static DEFINE_RATELIMIT_STATE(ratelimit, HZ / 5, 1);
6623 int ata_ratelimit(void)
6625 return __ratelimit(&ratelimit);
6627 EXPORT_SYMBOL_GPL(ata_ratelimit);
6630 * ata_msleep - ATA EH owner aware msleep
6631 * @ap: ATA port to attribute the sleep to
6632 * @msecs: duration to sleep in milliseconds
6634 * Sleeps @msecs. If the current task is owner of @ap's EH, the
6635 * ownership is released before going to sleep and reacquired
6636 * after the sleep is complete. IOW, other ports sharing the
6637 * @ap->host will be allowed to own the EH while this task is
6643 void ata_msleep(struct ata_port *ap, unsigned int msecs)
6645 bool owns_eh = ap && ap->host->eh_owner == current;
6651 unsigned long usecs = msecs * USEC_PER_MSEC;
6652 usleep_range(usecs, usecs + 50);
6660 EXPORT_SYMBOL_GPL(ata_msleep);
6663 * ata_wait_register - wait until register value changes
6664 * @ap: ATA port to wait register for, can be NULL
6665 * @reg: IO-mapped register
6666 * @mask: Mask to apply to read register value
6667 * @val: Wait condition
6668 * @interval: polling interval in milliseconds
6669 * @timeout: timeout in milliseconds
6671 * Waiting for some bits of register to change is a common
6672 * operation for ATA controllers. This function reads 32bit LE
6673 * IO-mapped register @reg and tests for the following condition.
6675 * (*@reg & mask) != val
6677 * If the condition is met, it returns; otherwise, the process is
6678 * repeated after @interval_msec until timeout.
6681 * Kernel thread context (may sleep)
6684 * The final register value.
6686 u32 ata_wait_register(struct ata_port *ap, void __iomem *reg, u32 mask, u32 val,
6687 unsigned long interval, unsigned long timeout)
6689 unsigned long deadline;
6692 tmp = ioread32(reg);
6694 /* Calculate timeout _after_ the first read to make sure
6695 * preceding writes reach the controller before starting to
6696 * eat away the timeout.
6698 deadline = ata_deadline(jiffies, timeout);
6700 while ((tmp & mask) == val && time_before(jiffies, deadline)) {
6701 ata_msleep(ap, interval);
6702 tmp = ioread32(reg);
6707 EXPORT_SYMBOL_GPL(ata_wait_register);
6712 static unsigned int ata_dummy_qc_issue(struct ata_queued_cmd *qc)
6714 return AC_ERR_SYSTEM;
6717 static void ata_dummy_error_handler(struct ata_port *ap)
6722 struct ata_port_operations ata_dummy_port_ops = {
6723 .qc_prep = ata_noop_qc_prep,
6724 .qc_issue = ata_dummy_qc_issue,
6725 .error_handler = ata_dummy_error_handler,
6726 .sched_eh = ata_std_sched_eh,
6727 .end_eh = ata_std_end_eh,
6729 EXPORT_SYMBOL_GPL(ata_dummy_port_ops);
6731 const struct ata_port_info ata_dummy_port_info = {
6732 .port_ops = &ata_dummy_port_ops,
6734 EXPORT_SYMBOL_GPL(ata_dummy_port_info);
6736 void ata_print_version(const struct device *dev, const char *version)
6738 dev_printk(KERN_DEBUG, dev, "version %s\n", version);
6740 EXPORT_SYMBOL(ata_print_version);
6742 EXPORT_TRACEPOINT_SYMBOL_GPL(ata_tf_load);
6743 EXPORT_TRACEPOINT_SYMBOL_GPL(ata_exec_command);
6744 EXPORT_TRACEPOINT_SYMBOL_GPL(ata_bmdma_setup);
6745 EXPORT_TRACEPOINT_SYMBOL_GPL(ata_bmdma_start);
6746 EXPORT_TRACEPOINT_SYMBOL_GPL(ata_bmdma_status);