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);
1591 rc = wait_for_completion_timeout(&wait, msecs_to_jiffies(timeout));
1595 ata_sff_flush_pio_task(ap);
1598 spin_lock_irqsave(ap->lock, flags);
1600 /* We're racing with irq here. If we lose, the
1601 * following test prevents us from completing the qc
1602 * twice. If we win, the port is frozen and will be
1603 * cleaned up by ->post_internal_cmd().
1605 if (qc->flags & ATA_QCFLAG_ACTIVE) {
1606 qc->err_mask |= AC_ERR_TIMEOUT;
1608 ata_port_freeze(ap);
1610 ata_dev_warn(dev, "qc timeout after %u msecs (cmd 0x%x)\n",
1614 spin_unlock_irqrestore(ap->lock, flags);
1617 /* do post_internal_cmd */
1618 if (ap->ops->post_internal_cmd)
1619 ap->ops->post_internal_cmd(qc);
1621 /* perform minimal error analysis */
1622 if (qc->flags & ATA_QCFLAG_EH) {
1623 if (qc->result_tf.status & (ATA_ERR | ATA_DF))
1624 qc->err_mask |= AC_ERR_DEV;
1627 qc->err_mask |= AC_ERR_OTHER;
1629 if (qc->err_mask & ~AC_ERR_OTHER)
1630 qc->err_mask &= ~AC_ERR_OTHER;
1631 } else if (qc->tf.command == ATA_CMD_REQ_SENSE_DATA) {
1632 qc->result_tf.status |= ATA_SENSE;
1636 spin_lock_irqsave(ap->lock, flags);
1638 *tf = qc->result_tf;
1639 err_mask = qc->err_mask;
1642 link->active_tag = preempted_tag;
1643 link->sactive = preempted_sactive;
1644 ap->qc_active = preempted_qc_active;
1645 ap->nr_active_links = preempted_nr_active_links;
1647 spin_unlock_irqrestore(ap->lock, flags);
1649 if ((err_mask & AC_ERR_TIMEOUT) && auto_timeout)
1650 ata_internal_cmd_timed_out(dev, command);
1656 * ata_exec_internal - execute libata internal command
1657 * @dev: Device to which the command is sent
1658 * @tf: Taskfile registers for the command and the result
1659 * @cdb: CDB for packet command
1660 * @dma_dir: Data transfer direction of the command
1661 * @buf: Data buffer of the command
1662 * @buflen: Length of data buffer
1663 * @timeout: Timeout in msecs (0 for default)
1665 * Wrapper around ata_exec_internal_sg() which takes simple
1666 * buffer instead of sg list.
1669 * None. Should be called with kernel context, might sleep.
1672 * Zero on success, AC_ERR_* mask on failure
1674 unsigned ata_exec_internal(struct ata_device *dev,
1675 struct ata_taskfile *tf, const u8 *cdb,
1676 int dma_dir, void *buf, unsigned int buflen,
1677 unsigned int timeout)
1679 struct scatterlist *psg = NULL, sg;
1680 unsigned int n_elem = 0;
1682 if (dma_dir != DMA_NONE) {
1684 sg_init_one(&sg, buf, buflen);
1689 return ata_exec_internal_sg(dev, tf, cdb, dma_dir, psg, n_elem,
1694 * ata_pio_need_iordy - check if iordy needed
1697 * Check if the current speed of the device requires IORDY. Used
1698 * by various controllers for chip configuration.
1700 unsigned int ata_pio_need_iordy(const struct ata_device *adev)
1702 /* Don't set IORDY if we're preparing for reset. IORDY may
1703 * lead to controller lock up on certain controllers if the
1704 * port is not occupied. See bko#11703 for details.
1706 if (adev->link->ap->pflags & ATA_PFLAG_RESETTING)
1708 /* Controller doesn't support IORDY. Probably a pointless
1709 * check as the caller should know this.
1711 if (adev->link->ap->flags & ATA_FLAG_NO_IORDY)
1713 /* CF spec. r4.1 Table 22 says no iordy on PIO5 and PIO6. */
1714 if (ata_id_is_cfa(adev->id)
1715 && (adev->pio_mode == XFER_PIO_5 || adev->pio_mode == XFER_PIO_6))
1717 /* PIO3 and higher it is mandatory */
1718 if (adev->pio_mode > XFER_PIO_2)
1720 /* We turn it on when possible */
1721 if (ata_id_has_iordy(adev->id))
1725 EXPORT_SYMBOL_GPL(ata_pio_need_iordy);
1728 * ata_pio_mask_no_iordy - Return the non IORDY mask
1731 * Compute the highest mode possible if we are not using iordy. Return
1732 * -1 if no iordy mode is available.
1734 static u32 ata_pio_mask_no_iordy(const struct ata_device *adev)
1736 /* If we have no drive specific rule, then PIO 2 is non IORDY */
1737 if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE */
1738 u16 pio = adev->id[ATA_ID_EIDE_PIO];
1739 /* Is the speed faster than the drive allows non IORDY ? */
1741 /* This is cycle times not frequency - watch the logic! */
1742 if (pio > 240) /* PIO2 is 240nS per cycle */
1743 return 3 << ATA_SHIFT_PIO;
1744 return 7 << ATA_SHIFT_PIO;
1747 return 3 << ATA_SHIFT_PIO;
1751 * ata_do_dev_read_id - default ID read method
1753 * @tf: proposed taskfile
1756 * Issue the identify taskfile and hand back the buffer containing
1757 * identify data. For some RAID controllers and for pre ATA devices
1758 * this function is wrapped or replaced by the driver
1760 unsigned int ata_do_dev_read_id(struct ata_device *dev,
1761 struct ata_taskfile *tf, __le16 *id)
1763 return ata_exec_internal(dev, tf, NULL, DMA_FROM_DEVICE,
1764 id, sizeof(id[0]) * ATA_ID_WORDS, 0);
1766 EXPORT_SYMBOL_GPL(ata_do_dev_read_id);
1769 * ata_dev_read_id - Read ID data from the specified device
1770 * @dev: target device
1771 * @p_class: pointer to class of the target device (may be changed)
1772 * @flags: ATA_READID_* flags
1773 * @id: buffer to read IDENTIFY data into
1775 * Read ID data from the specified device. ATA_CMD_ID_ATA is
1776 * performed on ATA devices and ATA_CMD_ID_ATAPI on ATAPI
1777 * devices. This function also issues ATA_CMD_INIT_DEV_PARAMS
1778 * for pre-ATA4 drives.
1780 * FIXME: ATA_CMD_ID_ATA is optional for early drives and right
1781 * now we abort if we hit that case.
1784 * Kernel thread context (may sleep)
1787 * 0 on success, -errno otherwise.
1789 int ata_dev_read_id(struct ata_device *dev, unsigned int *p_class,
1790 unsigned int flags, u16 *id)
1792 struct ata_port *ap = dev->link->ap;
1793 unsigned int class = *p_class;
1794 struct ata_taskfile tf;
1795 unsigned int err_mask = 0;
1797 bool is_semb = class == ATA_DEV_SEMB;
1798 int may_fallback = 1, tried_spinup = 0;
1802 ata_tf_init(dev, &tf);
1806 class = ATA_DEV_ATA; /* some hard drives report SEMB sig */
1810 tf.command = ATA_CMD_ID_ATA;
1813 tf.command = ATA_CMD_ID_ATAPI;
1817 reason = "unsupported class";
1821 tf.protocol = ATA_PROT_PIO;
1823 /* Some devices choke if TF registers contain garbage. Make
1824 * sure those are properly initialized.
1826 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
1828 /* Device presence detection is unreliable on some
1829 * controllers. Always poll IDENTIFY if available.
1831 tf.flags |= ATA_TFLAG_POLLING;
1833 if (ap->ops->read_id)
1834 err_mask = ap->ops->read_id(dev, &tf, (__le16 *)id);
1836 err_mask = ata_do_dev_read_id(dev, &tf, (__le16 *)id);
1839 if (err_mask & AC_ERR_NODEV_HINT) {
1840 ata_dev_dbg(dev, "NODEV after polling detection\n");
1846 "IDENTIFY failed on device w/ SEMB sig, disabled\n");
1847 /* SEMB is not supported yet */
1848 *p_class = ATA_DEV_SEMB_UNSUP;
1852 if ((err_mask == AC_ERR_DEV) && (tf.error & ATA_ABORTED)) {
1853 /* Device or controller might have reported
1854 * the wrong device class. Give a shot at the
1855 * other IDENTIFY if the current one is
1856 * aborted by the device.
1861 if (class == ATA_DEV_ATA)
1862 class = ATA_DEV_ATAPI;
1864 class = ATA_DEV_ATA;
1868 /* Control reaches here iff the device aborted
1869 * both flavors of IDENTIFYs which happens
1870 * sometimes with phantom devices.
1873 "both IDENTIFYs aborted, assuming NODEV\n");
1878 reason = "I/O error";
1882 if (dev->horkage & ATA_HORKAGE_DUMP_ID) {
1883 ata_dev_info(dev, "dumping IDENTIFY data, "
1884 "class=%d may_fallback=%d tried_spinup=%d\n",
1885 class, may_fallback, tried_spinup);
1886 print_hex_dump(KERN_INFO, "", DUMP_PREFIX_OFFSET,
1887 16, 2, id, ATA_ID_WORDS * sizeof(*id), true);
1890 /* Falling back doesn't make sense if ID data was read
1891 * successfully at least once.
1895 swap_buf_le16(id, ATA_ID_WORDS);
1899 reason = "device reports invalid type";
1901 if (class == ATA_DEV_ATA || class == ATA_DEV_ZAC) {
1902 if (!ata_id_is_ata(id) && !ata_id_is_cfa(id))
1904 if (ap->host->flags & ATA_HOST_IGNORE_ATA &&
1905 ata_id_is_ata(id)) {
1907 "host indicates ignore ATA devices, ignored\n");
1911 if (ata_id_is_ata(id))
1915 if (!tried_spinup && (id[2] == 0x37c8 || id[2] == 0x738c)) {
1918 * Drive powered-up in standby mode, and requires a specific
1919 * SET_FEATURES spin-up subcommand before it will accept
1920 * anything other than the original IDENTIFY command.
1922 err_mask = ata_dev_set_feature(dev, SETFEATURES_SPINUP, 0);
1923 if (err_mask && id[2] != 0x738c) {
1925 reason = "SPINUP failed";
1929 * If the drive initially returned incomplete IDENTIFY info,
1930 * we now must reissue the IDENTIFY command.
1932 if (id[2] == 0x37c8)
1936 if ((flags & ATA_READID_POSTRESET) &&
1937 (class == ATA_DEV_ATA || class == ATA_DEV_ZAC)) {
1939 * The exact sequence expected by certain pre-ATA4 drives is:
1941 * IDENTIFY (optional in early ATA)
1942 * INITIALIZE DEVICE PARAMETERS (later IDE and ATA)
1944 * Some drives were very specific about that exact sequence.
1946 * Note that ATA4 says lba is mandatory so the second check
1947 * should never trigger.
1949 if (ata_id_major_version(id) < 4 || !ata_id_has_lba(id)) {
1950 err_mask = ata_dev_init_params(dev, id[3], id[6]);
1953 reason = "INIT_DEV_PARAMS failed";
1957 /* current CHS translation info (id[53-58]) might be
1958 * changed. reread the identify device info.
1960 flags &= ~ATA_READID_POSTRESET;
1970 ata_dev_warn(dev, "failed to IDENTIFY (%s, err_mask=0x%x)\n",
1975 bool ata_dev_power_init_tf(struct ata_device *dev, struct ata_taskfile *tf,
1978 /* Only applies to ATA and ZAC devices */
1979 if (dev->class != ATA_DEV_ATA && dev->class != ATA_DEV_ZAC)
1982 ata_tf_init(dev, tf);
1983 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
1984 tf->protocol = ATA_PROT_NODATA;
1987 /* VERIFY for 1 sector at lba=0 */
1988 tf->command = ATA_CMD_VERIFY;
1990 if (dev->flags & ATA_DFLAG_LBA) {
1991 tf->flags |= ATA_TFLAG_LBA;
1992 tf->device |= ATA_LBA;
1995 tf->lbal = 0x1; /* sect */
1998 tf->command = ATA_CMD_STANDBYNOW1;
2004 static bool ata_dev_power_is_active(struct ata_device *dev)
2006 struct ata_taskfile tf;
2007 unsigned int err_mask;
2009 ata_tf_init(dev, &tf);
2010 tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
2011 tf.protocol = ATA_PROT_NODATA;
2012 tf.command = ATA_CMD_CHK_POWER;
2014 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
2016 ata_dev_err(dev, "Check power mode failed (err_mask=0x%x)\n",
2019 * Assume we are in standby mode so that we always force a
2020 * spinup in ata_dev_power_set_active().
2025 ata_dev_dbg(dev, "Power mode: 0x%02x\n", tf.nsect);
2027 /* Active or idle */
2028 return tf.nsect == 0xff;
2032 * ata_dev_power_set_standby - Set a device power mode to standby
2033 * @dev: target device
2035 * Issue a STANDBY IMMEDIATE command to set a device power mode to standby.
2036 * For an HDD device, this spins down the disks.
2039 * Kernel thread context (may sleep).
2041 void ata_dev_power_set_standby(struct ata_device *dev)
2043 unsigned long ap_flags = dev->link->ap->flags;
2044 struct ata_taskfile tf;
2045 unsigned int err_mask;
2047 /* If the device is already sleeping or in standby, do nothing. */
2048 if ((dev->flags & ATA_DFLAG_SLEEPING) ||
2049 !ata_dev_power_is_active(dev))
2053 * Some odd clown BIOSes issue spindown on power off (ACPI S4 or S5)
2054 * causing some drives to spin up and down again. For these, do nothing
2055 * if we are being called on shutdown.
2057 if ((ap_flags & ATA_FLAG_NO_POWEROFF_SPINDOWN) &&
2058 system_state == SYSTEM_POWER_OFF)
2061 if ((ap_flags & ATA_FLAG_NO_HIBERNATE_SPINDOWN) &&
2062 system_entering_hibernation())
2065 /* Issue STANDBY IMMEDIATE command only if supported by the device */
2066 if (!ata_dev_power_init_tf(dev, &tf, false))
2069 ata_dev_notice(dev, "Entering standby power mode\n");
2071 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
2073 ata_dev_err(dev, "STANDBY IMMEDIATE failed (err_mask=0x%x)\n",
2078 * ata_dev_power_set_active - Set a device power mode to active
2079 * @dev: target device
2081 * Issue a VERIFY command to enter to ensure that the device is in the
2082 * active power mode. For a spun-down HDD (standby or idle power mode),
2083 * the VERIFY command will complete after the disk spins up.
2086 * Kernel thread context (may sleep).
2088 void ata_dev_power_set_active(struct ata_device *dev)
2090 struct ata_taskfile tf;
2091 unsigned int err_mask;
2094 * Issue READ VERIFY SECTORS command for 1 sector at lba=0 only
2095 * if supported by the device.
2097 if (!ata_dev_power_init_tf(dev, &tf, true))
2101 * Check the device power state & condition and force a spinup with
2102 * VERIFY command only if the drive is not already ACTIVE or IDLE.
2104 if (ata_dev_power_is_active(dev))
2107 ata_dev_notice(dev, "Entering active power mode\n");
2109 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
2111 ata_dev_err(dev, "VERIFY failed (err_mask=0x%x)\n",
2116 * ata_read_log_page - read a specific log page
2117 * @dev: target device
2119 * @page: page to read
2120 * @buf: buffer to store read page
2121 * @sectors: number of sectors to read
2123 * Read log page using READ_LOG_EXT command.
2126 * Kernel thread context (may sleep).
2129 * 0 on success, AC_ERR_* mask otherwise.
2131 unsigned int ata_read_log_page(struct ata_device *dev, u8 log,
2132 u8 page, void *buf, unsigned int sectors)
2134 unsigned long ap_flags = dev->link->ap->flags;
2135 struct ata_taskfile tf;
2136 unsigned int err_mask;
2139 ata_dev_dbg(dev, "read log page - log 0x%x, page 0x%x\n", log, page);
2142 * Return error without actually issuing the command on controllers
2143 * which e.g. lockup on a read log page.
2145 if (ap_flags & ATA_FLAG_NO_LOG_PAGE)
2149 ata_tf_init(dev, &tf);
2150 if (ata_dma_enabled(dev) && ata_id_has_read_log_dma_ext(dev->id) &&
2151 !(dev->horkage & ATA_HORKAGE_NO_DMA_LOG)) {
2152 tf.command = ATA_CMD_READ_LOG_DMA_EXT;
2153 tf.protocol = ATA_PROT_DMA;
2156 tf.command = ATA_CMD_READ_LOG_EXT;
2157 tf.protocol = ATA_PROT_PIO;
2163 tf.hob_nsect = sectors >> 8;
2164 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_LBA48 | ATA_TFLAG_DEVICE;
2166 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_FROM_DEVICE,
2167 buf, sectors * ATA_SECT_SIZE, 0);
2171 dev->horkage |= ATA_HORKAGE_NO_DMA_LOG;
2172 if (!ata_port_is_frozen(dev->link->ap))
2176 "Read log 0x%02x page 0x%02x failed, Emask 0x%x\n",
2177 (unsigned int)log, (unsigned int)page, err_mask);
2183 static int ata_log_supported(struct ata_device *dev, u8 log)
2185 struct ata_port *ap = dev->link->ap;
2187 if (dev->horkage & ATA_HORKAGE_NO_LOG_DIR)
2190 if (ata_read_log_page(dev, ATA_LOG_DIRECTORY, 0, ap->sector_buf, 1))
2192 return get_unaligned_le16(&ap->sector_buf[log * 2]);
2195 static bool ata_identify_page_supported(struct ata_device *dev, u8 page)
2197 struct ata_port *ap = dev->link->ap;
2198 unsigned int err, i;
2200 if (dev->horkage & ATA_HORKAGE_NO_ID_DEV_LOG)
2203 if (!ata_log_supported(dev, ATA_LOG_IDENTIFY_DEVICE)) {
2205 * IDENTIFY DEVICE data log is defined as mandatory starting
2206 * with ACS-3 (ATA version 10). Warn about the missing log
2207 * for drives which implement this ATA level or above.
2209 if (ata_id_major_version(dev->id) >= 10)
2211 "ATA Identify Device Log not supported\n");
2212 dev->horkage |= ATA_HORKAGE_NO_ID_DEV_LOG;
2217 * Read IDENTIFY DEVICE data log, page 0, to figure out if the page is
2220 err = ata_read_log_page(dev, ATA_LOG_IDENTIFY_DEVICE, 0, ap->sector_buf,
2225 for (i = 0; i < ap->sector_buf[8]; i++) {
2226 if (ap->sector_buf[9 + i] == page)
2233 static int ata_do_link_spd_horkage(struct ata_device *dev)
2235 struct ata_link *plink = ata_dev_phys_link(dev);
2236 u32 target, target_limit;
2238 if (!sata_scr_valid(plink))
2241 if (dev->horkage & ATA_HORKAGE_1_5_GBPS)
2246 target_limit = (1 << target) - 1;
2248 /* if already on stricter limit, no need to push further */
2249 if (plink->sata_spd_limit <= target_limit)
2252 plink->sata_spd_limit = target_limit;
2254 /* Request another EH round by returning -EAGAIN if link is
2255 * going faster than the target speed. Forward progress is
2256 * guaranteed by setting sata_spd_limit to target_limit above.
2258 if (plink->sata_spd > target) {
2259 ata_dev_info(dev, "applying link speed limit horkage to %s\n",
2260 sata_spd_string(target));
2266 static inline u8 ata_dev_knobble(struct ata_device *dev)
2268 struct ata_port *ap = dev->link->ap;
2270 if (ata_dev_blacklisted(dev) & ATA_HORKAGE_BRIDGE_OK)
2273 return ((ap->cbl == ATA_CBL_SATA) && (!ata_id_is_sata(dev->id)));
2276 static void ata_dev_config_ncq_send_recv(struct ata_device *dev)
2278 struct ata_port *ap = dev->link->ap;
2279 unsigned int err_mask;
2281 if (!ata_log_supported(dev, ATA_LOG_NCQ_SEND_RECV)) {
2282 ata_dev_warn(dev, "NCQ Send/Recv Log not supported\n");
2285 err_mask = ata_read_log_page(dev, ATA_LOG_NCQ_SEND_RECV,
2286 0, ap->sector_buf, 1);
2288 u8 *cmds = dev->ncq_send_recv_cmds;
2290 dev->flags |= ATA_DFLAG_NCQ_SEND_RECV;
2291 memcpy(cmds, ap->sector_buf, ATA_LOG_NCQ_SEND_RECV_SIZE);
2293 if (dev->horkage & ATA_HORKAGE_NO_NCQ_TRIM) {
2294 ata_dev_dbg(dev, "disabling queued TRIM support\n");
2295 cmds[ATA_LOG_NCQ_SEND_RECV_DSM_OFFSET] &=
2296 ~ATA_LOG_NCQ_SEND_RECV_DSM_TRIM;
2301 static void ata_dev_config_ncq_non_data(struct ata_device *dev)
2303 struct ata_port *ap = dev->link->ap;
2304 unsigned int err_mask;
2306 if (!ata_log_supported(dev, ATA_LOG_NCQ_NON_DATA)) {
2308 "NCQ Send/Recv Log not supported\n");
2311 err_mask = ata_read_log_page(dev, ATA_LOG_NCQ_NON_DATA,
2312 0, ap->sector_buf, 1);
2314 u8 *cmds = dev->ncq_non_data_cmds;
2316 memcpy(cmds, ap->sector_buf, ATA_LOG_NCQ_NON_DATA_SIZE);
2320 static void ata_dev_config_ncq_prio(struct ata_device *dev)
2322 struct ata_port *ap = dev->link->ap;
2323 unsigned int err_mask;
2325 if (!ata_identify_page_supported(dev, ATA_LOG_SATA_SETTINGS))
2328 err_mask = ata_read_log_page(dev,
2329 ATA_LOG_IDENTIFY_DEVICE,
2330 ATA_LOG_SATA_SETTINGS,
2336 if (!(ap->sector_buf[ATA_LOG_NCQ_PRIO_OFFSET] & BIT(3)))
2339 dev->flags |= ATA_DFLAG_NCQ_PRIO;
2344 dev->flags &= ~ATA_DFLAG_NCQ_PRIO_ENABLED;
2345 dev->flags &= ~ATA_DFLAG_NCQ_PRIO;
2348 static bool ata_dev_check_adapter(struct ata_device *dev,
2349 unsigned short vendor_id)
2351 struct pci_dev *pcidev = NULL;
2352 struct device *parent_dev = NULL;
2354 for (parent_dev = dev->tdev.parent; parent_dev != NULL;
2355 parent_dev = parent_dev->parent) {
2356 if (dev_is_pci(parent_dev)) {
2357 pcidev = to_pci_dev(parent_dev);
2358 if (pcidev->vendor == vendor_id)
2367 static int ata_dev_config_ncq(struct ata_device *dev,
2368 char *desc, size_t desc_sz)
2370 struct ata_port *ap = dev->link->ap;
2371 int hdepth = 0, ddepth = ata_id_queue_depth(dev->id);
2372 unsigned int err_mask;
2375 if (!ata_id_has_ncq(dev->id)) {
2379 if (!IS_ENABLED(CONFIG_SATA_HOST))
2381 if (dev->horkage & ATA_HORKAGE_NONCQ) {
2382 snprintf(desc, desc_sz, "NCQ (not used)");
2386 if (dev->horkage & ATA_HORKAGE_NO_NCQ_ON_ATI &&
2387 ata_dev_check_adapter(dev, PCI_VENDOR_ID_ATI)) {
2388 snprintf(desc, desc_sz, "NCQ (not used)");
2392 if (ap->flags & ATA_FLAG_NCQ) {
2393 hdepth = min(ap->scsi_host->can_queue, ATA_MAX_QUEUE);
2394 dev->flags |= ATA_DFLAG_NCQ;
2397 if (!(dev->horkage & ATA_HORKAGE_BROKEN_FPDMA_AA) &&
2398 (ap->flags & ATA_FLAG_FPDMA_AA) &&
2399 ata_id_has_fpdma_aa(dev->id)) {
2400 err_mask = ata_dev_set_feature(dev, SETFEATURES_SATA_ENABLE,
2404 "failed to enable AA (error_mask=0x%x)\n",
2406 if (err_mask != AC_ERR_DEV) {
2407 dev->horkage |= ATA_HORKAGE_BROKEN_FPDMA_AA;
2414 if (hdepth >= ddepth)
2415 snprintf(desc, desc_sz, "NCQ (depth %d)%s", ddepth, aa_desc);
2417 snprintf(desc, desc_sz, "NCQ (depth %d/%d)%s", hdepth,
2420 if ((ap->flags & ATA_FLAG_FPDMA_AUX)) {
2421 if (ata_id_has_ncq_send_and_recv(dev->id))
2422 ata_dev_config_ncq_send_recv(dev);
2423 if (ata_id_has_ncq_non_data(dev->id))
2424 ata_dev_config_ncq_non_data(dev);
2425 if (ata_id_has_ncq_prio(dev->id))
2426 ata_dev_config_ncq_prio(dev);
2432 static void ata_dev_config_sense_reporting(struct ata_device *dev)
2434 unsigned int err_mask;
2436 if (!ata_id_has_sense_reporting(dev->id))
2439 if (ata_id_sense_reporting_enabled(dev->id))
2442 err_mask = ata_dev_set_feature(dev, SETFEATURE_SENSE_DATA, 0x1);
2445 "failed to enable Sense Data Reporting, Emask 0x%x\n",
2450 static void ata_dev_config_zac(struct ata_device *dev)
2452 struct ata_port *ap = dev->link->ap;
2453 unsigned int err_mask;
2454 u8 *identify_buf = ap->sector_buf;
2456 dev->zac_zones_optimal_open = U32_MAX;
2457 dev->zac_zones_optimal_nonseq = U32_MAX;
2458 dev->zac_zones_max_open = U32_MAX;
2461 * Always set the 'ZAC' flag for Host-managed devices.
2463 if (dev->class == ATA_DEV_ZAC)
2464 dev->flags |= ATA_DFLAG_ZAC;
2465 else if (ata_id_zoned_cap(dev->id) == 0x01)
2467 * Check for host-aware devices.
2469 dev->flags |= ATA_DFLAG_ZAC;
2471 if (!(dev->flags & ATA_DFLAG_ZAC))
2474 if (!ata_identify_page_supported(dev, ATA_LOG_ZONED_INFORMATION)) {
2476 "ATA Zoned Information Log not supported\n");
2481 * Read IDENTIFY DEVICE data log, page 9 (Zoned-device information)
2483 err_mask = ata_read_log_page(dev, ATA_LOG_IDENTIFY_DEVICE,
2484 ATA_LOG_ZONED_INFORMATION,
2487 u64 zoned_cap, opt_open, opt_nonseq, max_open;
2489 zoned_cap = get_unaligned_le64(&identify_buf[8]);
2490 if ((zoned_cap >> 63))
2491 dev->zac_zoned_cap = (zoned_cap & 1);
2492 opt_open = get_unaligned_le64(&identify_buf[24]);
2493 if ((opt_open >> 63))
2494 dev->zac_zones_optimal_open = (u32)opt_open;
2495 opt_nonseq = get_unaligned_le64(&identify_buf[32]);
2496 if ((opt_nonseq >> 63))
2497 dev->zac_zones_optimal_nonseq = (u32)opt_nonseq;
2498 max_open = get_unaligned_le64(&identify_buf[40]);
2499 if ((max_open >> 63))
2500 dev->zac_zones_max_open = (u32)max_open;
2504 static void ata_dev_config_trusted(struct ata_device *dev)
2506 struct ata_port *ap = dev->link->ap;
2510 if (!ata_id_has_trusted(dev->id))
2513 if (!ata_identify_page_supported(dev, ATA_LOG_SECURITY)) {
2515 "Security Log not supported\n");
2519 err = ata_read_log_page(dev, ATA_LOG_IDENTIFY_DEVICE, ATA_LOG_SECURITY,
2524 trusted_cap = get_unaligned_le64(&ap->sector_buf[40]);
2525 if (!(trusted_cap & (1ULL << 63))) {
2527 "Trusted Computing capability qword not valid!\n");
2531 if (trusted_cap & (1 << 0))
2532 dev->flags |= ATA_DFLAG_TRUSTED;
2535 static void ata_dev_config_cdl(struct ata_device *dev)
2537 struct ata_port *ap = dev->link->ap;
2538 unsigned int err_mask;
2542 if (ata_id_major_version(dev->id) < 12)
2545 if (!ata_log_supported(dev, ATA_LOG_IDENTIFY_DEVICE) ||
2546 !ata_identify_page_supported(dev, ATA_LOG_SUPPORTED_CAPABILITIES) ||
2547 !ata_identify_page_supported(dev, ATA_LOG_CURRENT_SETTINGS))
2550 err_mask = ata_read_log_page(dev, ATA_LOG_IDENTIFY_DEVICE,
2551 ATA_LOG_SUPPORTED_CAPABILITIES,
2556 /* Check Command Duration Limit Supported bits */
2557 val = get_unaligned_le64(&ap->sector_buf[168]);
2558 if (!(val & BIT_ULL(63)) || !(val & BIT_ULL(0)))
2561 /* Warn the user if command duration guideline is not supported */
2562 if (!(val & BIT_ULL(1)))
2564 "Command duration guideline is not supported\n");
2567 * We must have support for the sense data for successful NCQ commands
2568 * log indicated by the successful NCQ command sense data supported bit.
2570 val = get_unaligned_le64(&ap->sector_buf[8]);
2571 if (!(val & BIT_ULL(63)) || !(val & BIT_ULL(47))) {
2573 "CDL supported but Successful NCQ Command Sense Data is not supported\n");
2577 /* Without NCQ autosense, the successful NCQ commands log is useless. */
2578 if (!ata_id_has_ncq_autosense(dev->id)) {
2580 "CDL supported but NCQ autosense is not supported\n");
2585 * If CDL is marked as enabled, make sure the feature is enabled too.
2586 * Conversely, if CDL is disabled, make sure the feature is turned off.
2588 err_mask = ata_read_log_page(dev, ATA_LOG_IDENTIFY_DEVICE,
2589 ATA_LOG_CURRENT_SETTINGS,
2594 val = get_unaligned_le64(&ap->sector_buf[8]);
2595 cdl_enabled = val & BIT_ULL(63) && val & BIT_ULL(21);
2596 if (dev->flags & ATA_DFLAG_CDL_ENABLED) {
2598 /* Enable CDL on the device */
2599 err_mask = ata_dev_set_feature(dev, SETFEATURES_CDL, 1);
2602 "Enable CDL feature failed\n");
2608 /* Disable CDL on the device */
2609 err_mask = ata_dev_set_feature(dev, SETFEATURES_CDL, 0);
2612 "Disable CDL feature failed\n");
2619 * While CDL itself has to be enabled using sysfs, CDL requires that
2620 * sense data for successful NCQ commands is enabled to work properly.
2621 * Just like ata_dev_config_sense_reporting(), enable it unconditionally
2624 if (!(val & BIT_ULL(63)) || !(val & BIT_ULL(18))) {
2625 err_mask = ata_dev_set_feature(dev,
2626 SETFEATURE_SENSE_DATA_SUCC_NCQ, 0x1);
2629 "failed to enable Sense Data for successful NCQ commands, Emask 0x%x\n",
2636 * Allocate a buffer to handle reading the sense data for successful
2637 * NCQ Commands log page for commands using a CDL with one of the limit
2638 * policy set to 0xD (successful completion with sense data available
2641 if (!ap->ncq_sense_buf) {
2642 ap->ncq_sense_buf = kmalloc(ATA_LOG_SENSE_NCQ_SIZE, GFP_KERNEL);
2643 if (!ap->ncq_sense_buf)
2648 * Command duration limits is supported: cache the CDL log page 18h
2649 * (command duration descriptors).
2651 err_mask = ata_read_log_page(dev, ATA_LOG_CDL, 0, ap->sector_buf, 1);
2653 ata_dev_warn(dev, "Read Command Duration Limits log failed\n");
2657 memcpy(dev->cdl, ap->sector_buf, ATA_LOG_CDL_SIZE);
2658 dev->flags |= ATA_DFLAG_CDL;
2663 dev->flags &= ~(ATA_DFLAG_CDL | ATA_DFLAG_CDL_ENABLED);
2664 kfree(ap->ncq_sense_buf);
2665 ap->ncq_sense_buf = NULL;
2668 static int ata_dev_config_lba(struct ata_device *dev)
2670 const u16 *id = dev->id;
2671 const char *lba_desc;
2675 dev->flags |= ATA_DFLAG_LBA;
2677 if (ata_id_has_lba48(id)) {
2679 dev->flags |= ATA_DFLAG_LBA48;
2680 if (dev->n_sectors >= (1UL << 28) &&
2681 ata_id_has_flush_ext(id))
2682 dev->flags |= ATA_DFLAG_FLUSH_EXT;
2688 ret = ata_dev_config_ncq(dev, ncq_desc, sizeof(ncq_desc));
2690 /* print device info to dmesg */
2691 if (ata_dev_print_info(dev))
2693 "%llu sectors, multi %u: %s %s\n",
2694 (unsigned long long)dev->n_sectors,
2695 dev->multi_count, lba_desc, ncq_desc);
2700 static void ata_dev_config_chs(struct ata_device *dev)
2702 const u16 *id = dev->id;
2704 if (ata_id_current_chs_valid(id)) {
2705 /* Current CHS translation is valid. */
2706 dev->cylinders = id[54];
2707 dev->heads = id[55];
2708 dev->sectors = id[56];
2710 /* Default translation */
2711 dev->cylinders = id[1];
2713 dev->sectors = id[6];
2716 /* print device info to dmesg */
2717 if (ata_dev_print_info(dev))
2719 "%llu sectors, multi %u, CHS %u/%u/%u\n",
2720 (unsigned long long)dev->n_sectors,
2721 dev->multi_count, dev->cylinders,
2722 dev->heads, dev->sectors);
2725 static void ata_dev_config_fua(struct ata_device *dev)
2727 /* Ignore FUA support if its use is disabled globally */
2731 /* Ignore devices without support for WRITE DMA FUA EXT */
2732 if (!(dev->flags & ATA_DFLAG_LBA48) || !ata_id_has_fua(dev->id))
2735 /* Ignore known bad devices and devices that lack NCQ support */
2736 if (!ata_ncq_supported(dev) || (dev->horkage & ATA_HORKAGE_NO_FUA))
2739 dev->flags |= ATA_DFLAG_FUA;
2744 dev->flags &= ~ATA_DFLAG_FUA;
2747 static void ata_dev_config_devslp(struct ata_device *dev)
2749 u8 *sata_setting = dev->link->ap->sector_buf;
2750 unsigned int err_mask;
2754 * Check device sleep capability. Get DevSlp timing variables
2755 * from SATA Settings page of Identify Device Data Log.
2757 if (!ata_id_has_devslp(dev->id) ||
2758 !ata_identify_page_supported(dev, ATA_LOG_SATA_SETTINGS))
2761 err_mask = ata_read_log_page(dev,
2762 ATA_LOG_IDENTIFY_DEVICE,
2763 ATA_LOG_SATA_SETTINGS,
2768 dev->flags |= ATA_DFLAG_DEVSLP;
2769 for (i = 0; i < ATA_LOG_DEVSLP_SIZE; i++) {
2770 j = ATA_LOG_DEVSLP_OFFSET + i;
2771 dev->devslp_timing[i] = sata_setting[j];
2775 static void ata_dev_config_cpr(struct ata_device *dev)
2777 unsigned int err_mask;
2780 struct ata_cpr_log *cpr_log = NULL;
2781 u8 *desc, *buf = NULL;
2783 if (ata_id_major_version(dev->id) < 11)
2786 buf_len = ata_log_supported(dev, ATA_LOG_CONCURRENT_POSITIONING_RANGES);
2791 * Read the concurrent positioning ranges log (0x47). We can have at
2792 * most 255 32B range descriptors plus a 64B header. This log varies in
2793 * size, so use the size reported in the GPL directory. Reading beyond
2794 * the supported length will result in an error.
2797 buf = kzalloc(buf_len, GFP_KERNEL);
2801 err_mask = ata_read_log_page(dev, ATA_LOG_CONCURRENT_POSITIONING_RANGES,
2802 0, buf, buf_len >> 9);
2810 cpr_log = kzalloc(struct_size(cpr_log, cpr, nr_cpr), GFP_KERNEL);
2814 cpr_log->nr_cpr = nr_cpr;
2816 for (i = 0; i < nr_cpr; i++, desc += 32) {
2817 cpr_log->cpr[i].num = desc[0];
2818 cpr_log->cpr[i].num_storage_elements = desc[1];
2819 cpr_log->cpr[i].start_lba = get_unaligned_le64(&desc[8]);
2820 cpr_log->cpr[i].num_lbas = get_unaligned_le64(&desc[16]);
2824 swap(dev->cpr_log, cpr_log);
2829 static void ata_dev_print_features(struct ata_device *dev)
2831 if (!(dev->flags & ATA_DFLAG_FEATURES_MASK))
2835 "Features:%s%s%s%s%s%s%s%s\n",
2836 dev->flags & ATA_DFLAG_FUA ? " FUA" : "",
2837 dev->flags & ATA_DFLAG_TRUSTED ? " Trust" : "",
2838 dev->flags & ATA_DFLAG_DA ? " Dev-Attention" : "",
2839 dev->flags & ATA_DFLAG_DEVSLP ? " Dev-Sleep" : "",
2840 dev->flags & ATA_DFLAG_NCQ_SEND_RECV ? " NCQ-sndrcv" : "",
2841 dev->flags & ATA_DFLAG_NCQ_PRIO ? " NCQ-prio" : "",
2842 dev->flags & ATA_DFLAG_CDL ? " CDL" : "",
2843 dev->cpr_log ? " CPR" : "");
2847 * ata_dev_configure - Configure the specified ATA/ATAPI device
2848 * @dev: Target device to configure
2850 * Configure @dev according to @dev->id. Generic and low-level
2851 * driver specific fixups are also applied.
2854 * Kernel thread context (may sleep)
2857 * 0 on success, -errno otherwise
2859 int ata_dev_configure(struct ata_device *dev)
2861 struct ata_port *ap = dev->link->ap;
2862 bool print_info = ata_dev_print_info(dev);
2863 const u16 *id = dev->id;
2864 unsigned int xfer_mask;
2865 unsigned int err_mask;
2866 char revbuf[7]; /* XYZ-99\0 */
2867 char fwrevbuf[ATA_ID_FW_REV_LEN+1];
2868 char modelbuf[ATA_ID_PROD_LEN+1];
2871 if (!ata_dev_enabled(dev)) {
2872 ata_dev_dbg(dev, "no device\n");
2877 dev->horkage |= ata_dev_blacklisted(dev);
2878 ata_force_horkage(dev);
2880 if (dev->horkage & ATA_HORKAGE_DISABLE) {
2881 ata_dev_info(dev, "unsupported device, disabling\n");
2882 ata_dev_disable(dev);
2886 if ((!atapi_enabled || (ap->flags & ATA_FLAG_NO_ATAPI)) &&
2887 dev->class == ATA_DEV_ATAPI) {
2888 ata_dev_warn(dev, "WARNING: ATAPI is %s, device ignored\n",
2889 atapi_enabled ? "not supported with this driver"
2891 ata_dev_disable(dev);
2895 rc = ata_do_link_spd_horkage(dev);
2899 /* some WD SATA-1 drives have issues with LPM, turn on NOLPM for them */
2900 if ((dev->horkage & ATA_HORKAGE_WD_BROKEN_LPM) &&
2901 (id[ATA_ID_SATA_CAPABILITY] & 0xe) == 0x2)
2902 dev->horkage |= ATA_HORKAGE_NOLPM;
2904 if (ap->flags & ATA_FLAG_NO_LPM)
2905 dev->horkage |= ATA_HORKAGE_NOLPM;
2907 if (dev->horkage & ATA_HORKAGE_NOLPM) {
2908 ata_dev_warn(dev, "LPM support broken, forcing max_power\n");
2909 dev->link->ap->target_lpm_policy = ATA_LPM_MAX_POWER;
2912 /* let ACPI work its magic */
2913 rc = ata_acpi_on_devcfg(dev);
2917 /* massage HPA, do it early as it might change IDENTIFY data */
2918 rc = ata_hpa_resize(dev);
2922 /* print device capabilities */
2924 "%s: cfg 49:%04x 82:%04x 83:%04x 84:%04x "
2925 "85:%04x 86:%04x 87:%04x 88:%04x\n",
2927 id[49], id[82], id[83], id[84],
2928 id[85], id[86], id[87], id[88]);
2930 /* initialize to-be-configured parameters */
2931 dev->flags &= ~ATA_DFLAG_CFG_MASK;
2932 dev->max_sectors = 0;
2938 dev->multi_count = 0;
2941 * common ATA, ATAPI feature tests
2944 /* find max transfer mode; for printk only */
2945 xfer_mask = ata_id_xfermask(id);
2947 ata_dump_id(dev, id);
2949 /* SCSI only uses 4-char revisions, dump full 8 chars from ATA */
2950 ata_id_c_string(dev->id, fwrevbuf, ATA_ID_FW_REV,
2953 ata_id_c_string(dev->id, modelbuf, ATA_ID_PROD,
2956 /* ATA-specific feature tests */
2957 if (dev->class == ATA_DEV_ATA || dev->class == ATA_DEV_ZAC) {
2958 if (ata_id_is_cfa(id)) {
2959 /* CPRM may make this media unusable */
2960 if (id[ATA_ID_CFA_KEY_MGMT] & 1)
2962 "supports DRM functions and may not be fully accessible\n");
2963 snprintf(revbuf, 7, "CFA");
2965 snprintf(revbuf, 7, "ATA-%d", ata_id_major_version(id));
2966 /* Warn the user if the device has TPM extensions */
2967 if (ata_id_has_tpm(id))
2969 "supports DRM functions and may not be fully accessible\n");
2972 dev->n_sectors = ata_id_n_sectors(id);
2974 /* get current R/W Multiple count setting */
2975 if ((dev->id[47] >> 8) == 0x80 && (dev->id[59] & 0x100)) {
2976 unsigned int max = dev->id[47] & 0xff;
2977 unsigned int cnt = dev->id[59] & 0xff;
2978 /* only recognize/allow powers of two here */
2979 if (is_power_of_2(max) && is_power_of_2(cnt))
2981 dev->multi_count = cnt;
2984 /* print device info to dmesg */
2986 ata_dev_info(dev, "%s: %s, %s, max %s\n",
2987 revbuf, modelbuf, fwrevbuf,
2988 ata_mode_string(xfer_mask));
2990 if (ata_id_has_lba(id)) {
2991 rc = ata_dev_config_lba(dev);
2995 ata_dev_config_chs(dev);
2998 ata_dev_config_fua(dev);
2999 ata_dev_config_devslp(dev);
3000 ata_dev_config_sense_reporting(dev);
3001 ata_dev_config_zac(dev);
3002 ata_dev_config_trusted(dev);
3003 ata_dev_config_cpr(dev);
3004 ata_dev_config_cdl(dev);
3008 ata_dev_print_features(dev);
3011 /* ATAPI-specific feature tests */
3012 else if (dev->class == ATA_DEV_ATAPI) {
3013 const char *cdb_intr_string = "";
3014 const char *atapi_an_string = "";
3015 const char *dma_dir_string = "";
3018 rc = atapi_cdb_len(id);
3019 if ((rc < 12) || (rc > ATAPI_CDB_LEN)) {
3020 ata_dev_warn(dev, "unsupported CDB len %d\n", rc);
3024 dev->cdb_len = (unsigned int) rc;
3026 /* Enable ATAPI AN if both the host and device have
3027 * the support. If PMP is attached, SNTF is required
3028 * to enable ATAPI AN to discern between PHY status
3029 * changed notifications and ATAPI ANs.
3032 (ap->flags & ATA_FLAG_AN) && ata_id_has_atapi_AN(id) &&
3033 (!sata_pmp_attached(ap) ||
3034 sata_scr_read(&ap->link, SCR_NOTIFICATION, &sntf) == 0)) {
3035 /* issue SET feature command to turn this on */
3036 err_mask = ata_dev_set_feature(dev,
3037 SETFEATURES_SATA_ENABLE, SATA_AN);
3040 "failed to enable ATAPI AN (err_mask=0x%x)\n",
3043 dev->flags |= ATA_DFLAG_AN;
3044 atapi_an_string = ", ATAPI AN";
3048 if (ata_id_cdb_intr(dev->id)) {
3049 dev->flags |= ATA_DFLAG_CDB_INTR;
3050 cdb_intr_string = ", CDB intr";
3053 if (atapi_dmadir || (dev->horkage & ATA_HORKAGE_ATAPI_DMADIR) || atapi_id_dmadir(dev->id)) {
3054 dev->flags |= ATA_DFLAG_DMADIR;
3055 dma_dir_string = ", DMADIR";
3058 if (ata_id_has_da(dev->id)) {
3059 dev->flags |= ATA_DFLAG_DA;
3063 /* print device info to dmesg */
3066 "ATAPI: %s, %s, max %s%s%s%s\n",
3068 ata_mode_string(xfer_mask),
3069 cdb_intr_string, atapi_an_string,
3073 /* determine max_sectors */
3074 dev->max_sectors = ATA_MAX_SECTORS;
3075 if (dev->flags & ATA_DFLAG_LBA48)
3076 dev->max_sectors = ATA_MAX_SECTORS_LBA48;
3078 /* Limit PATA drive on SATA cable bridge transfers to udma5,
3080 if (ata_dev_knobble(dev)) {
3082 ata_dev_info(dev, "applying bridge limits\n");
3083 dev->udma_mask &= ATA_UDMA5;
3084 dev->max_sectors = ATA_MAX_SECTORS;
3087 if ((dev->class == ATA_DEV_ATAPI) &&
3088 (atapi_command_packet_set(id) == TYPE_TAPE)) {
3089 dev->max_sectors = ATA_MAX_SECTORS_TAPE;
3090 dev->horkage |= ATA_HORKAGE_STUCK_ERR;
3093 if (dev->horkage & ATA_HORKAGE_MAX_SEC_128)
3094 dev->max_sectors = min_t(unsigned int, ATA_MAX_SECTORS_128,
3097 if (dev->horkage & ATA_HORKAGE_MAX_SEC_1024)
3098 dev->max_sectors = min_t(unsigned int, ATA_MAX_SECTORS_1024,
3101 if (dev->horkage & ATA_HORKAGE_MAX_SEC_LBA48)
3102 dev->max_sectors = ATA_MAX_SECTORS_LBA48;
3104 if (ap->ops->dev_config)
3105 ap->ops->dev_config(dev);
3107 if (dev->horkage & ATA_HORKAGE_DIAGNOSTIC) {
3108 /* Let the user know. We don't want to disallow opens for
3109 rescue purposes, or in case the vendor is just a blithering
3110 idiot. Do this after the dev_config call as some controllers
3111 with buggy firmware may want to avoid reporting false device
3116 "Drive reports diagnostics failure. This may indicate a drive\n");
3118 "fault or invalid emulation. Contact drive vendor for information.\n");
3122 if ((dev->horkage & ATA_HORKAGE_FIRMWARE_WARN) && print_info) {
3123 ata_dev_warn(dev, "WARNING: device requires firmware update to be fully functional\n");
3124 ata_dev_warn(dev, " contact the vendor or visit http://ata.wiki.kernel.org\n");
3134 * ata_cable_40wire - return 40 wire cable type
3137 * Helper method for drivers which want to hardwire 40 wire cable
3141 int ata_cable_40wire(struct ata_port *ap)
3143 return ATA_CBL_PATA40;
3145 EXPORT_SYMBOL_GPL(ata_cable_40wire);
3148 * ata_cable_80wire - return 80 wire cable type
3151 * Helper method for drivers which want to hardwire 80 wire cable
3155 int ata_cable_80wire(struct ata_port *ap)
3157 return ATA_CBL_PATA80;
3159 EXPORT_SYMBOL_GPL(ata_cable_80wire);
3162 * ata_cable_unknown - return unknown PATA cable.
3165 * Helper method for drivers which have no PATA cable detection.
3168 int ata_cable_unknown(struct ata_port *ap)
3170 return ATA_CBL_PATA_UNK;
3172 EXPORT_SYMBOL_GPL(ata_cable_unknown);
3175 * ata_cable_ignore - return ignored PATA cable.
3178 * Helper method for drivers which don't use cable type to limit
3181 int ata_cable_ignore(struct ata_port *ap)
3183 return ATA_CBL_PATA_IGN;
3185 EXPORT_SYMBOL_GPL(ata_cable_ignore);
3188 * ata_cable_sata - return SATA cable type
3191 * Helper method for drivers which have SATA cables
3194 int ata_cable_sata(struct ata_port *ap)
3196 return ATA_CBL_SATA;
3198 EXPORT_SYMBOL_GPL(ata_cable_sata);
3201 * sata_print_link_status - Print SATA link status
3202 * @link: SATA link to printk link status about
3204 * This function prints link speed and status of a SATA link.
3209 static void sata_print_link_status(struct ata_link *link)
3211 u32 sstatus, scontrol, tmp;
3213 if (sata_scr_read(link, SCR_STATUS, &sstatus))
3215 if (sata_scr_read(link, SCR_CONTROL, &scontrol))
3218 if (ata_phys_link_online(link)) {
3219 tmp = (sstatus >> 4) & 0xf;
3220 ata_link_info(link, "SATA link up %s (SStatus %X SControl %X)\n",
3221 sata_spd_string(tmp), sstatus, scontrol);
3223 ata_link_info(link, "SATA link down (SStatus %X SControl %X)\n",
3229 * ata_dev_pair - return other device on cable
3232 * Obtain the other device on the same cable, or if none is
3233 * present NULL is returned
3236 struct ata_device *ata_dev_pair(struct ata_device *adev)
3238 struct ata_link *link = adev->link;
3239 struct ata_device *pair = &link->device[1 - adev->devno];
3240 if (!ata_dev_enabled(pair))
3244 EXPORT_SYMBOL_GPL(ata_dev_pair);
3247 * sata_down_spd_limit - adjust SATA spd limit downward
3248 * @link: Link to adjust SATA spd limit for
3249 * @spd_limit: Additional limit
3251 * Adjust SATA spd limit of @link downward. Note that this
3252 * function only adjusts the limit. The change must be applied
3253 * using sata_set_spd().
3255 * If @spd_limit is non-zero, the speed is limited to equal to or
3256 * lower than @spd_limit if such speed is supported. If
3257 * @spd_limit is slower than any supported speed, only the lowest
3258 * supported speed is allowed.
3261 * Inherited from caller.
3264 * 0 on success, negative errno on failure
3266 int sata_down_spd_limit(struct ata_link *link, u32 spd_limit)
3268 u32 sstatus, spd, mask;
3271 if (!sata_scr_valid(link))
3274 /* If SCR can be read, use it to determine the current SPD.
3275 * If not, use cached value in link->sata_spd.
3277 rc = sata_scr_read(link, SCR_STATUS, &sstatus);
3278 if (rc == 0 && ata_sstatus_online(sstatus))
3279 spd = (sstatus >> 4) & 0xf;
3281 spd = link->sata_spd;
3283 mask = link->sata_spd_limit;
3287 /* unconditionally mask off the highest bit */
3288 bit = fls(mask) - 1;
3289 mask &= ~(1 << bit);
3292 * Mask off all speeds higher than or equal to the current one. At
3293 * this point, if current SPD is not available and we previously
3294 * recorded the link speed from SStatus, the driver has already
3295 * masked off the highest bit so mask should already be 1 or 0.
3296 * Otherwise, we should not force 1.5Gbps on a link where we have
3297 * not previously recorded speed from SStatus. Just return in this
3301 mask &= (1 << (spd - 1)) - 1;
3302 else if (link->sata_spd)
3305 /* were we already at the bottom? */
3310 if (mask & ((1 << spd_limit) - 1))
3311 mask &= (1 << spd_limit) - 1;
3313 bit = ffs(mask) - 1;
3318 link->sata_spd_limit = mask;
3320 ata_link_warn(link, "limiting SATA link speed to %s\n",
3321 sata_spd_string(fls(mask)));
3326 #ifdef CONFIG_ATA_ACPI
3328 * ata_timing_cycle2mode - find xfer mode for the specified cycle duration
3329 * @xfer_shift: ATA_SHIFT_* value for transfer type to examine.
3330 * @cycle: cycle duration in ns
3332 * Return matching xfer mode for @cycle. The returned mode is of
3333 * the transfer type specified by @xfer_shift. If @cycle is too
3334 * slow for @xfer_shift, 0xff is returned. If @cycle is faster
3335 * than the fastest known mode, the fasted mode is returned.
3341 * Matching xfer_mode, 0xff if no match found.
3343 u8 ata_timing_cycle2mode(unsigned int xfer_shift, int cycle)
3345 u8 base_mode = 0xff, last_mode = 0xff;
3346 const struct ata_xfer_ent *ent;
3347 const struct ata_timing *t;
3349 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
3350 if (ent->shift == xfer_shift)
3351 base_mode = ent->base;
3353 for (t = ata_timing_find_mode(base_mode);
3354 t && ata_xfer_mode2shift(t->mode) == xfer_shift; t++) {
3355 unsigned short this_cycle;
3357 switch (xfer_shift) {
3359 case ATA_SHIFT_MWDMA:
3360 this_cycle = t->cycle;
3362 case ATA_SHIFT_UDMA:
3363 this_cycle = t->udma;
3369 if (cycle > this_cycle)
3372 last_mode = t->mode;
3380 * ata_down_xfermask_limit - adjust dev xfer masks downward
3381 * @dev: Device to adjust xfer masks
3382 * @sel: ATA_DNXFER_* selector
3384 * Adjust xfer masks of @dev downward. Note that this function
3385 * does not apply the change. Invoking ata_set_mode() afterwards
3386 * will apply the limit.
3389 * Inherited from caller.
3392 * 0 on success, negative errno on failure
3394 int ata_down_xfermask_limit(struct ata_device *dev, unsigned int sel)
3397 unsigned int orig_mask, xfer_mask;
3398 unsigned int pio_mask, mwdma_mask, udma_mask;
3401 quiet = !!(sel & ATA_DNXFER_QUIET);
3402 sel &= ~ATA_DNXFER_QUIET;
3404 xfer_mask = orig_mask = ata_pack_xfermask(dev->pio_mask,
3407 ata_unpack_xfermask(xfer_mask, &pio_mask, &mwdma_mask, &udma_mask);
3410 case ATA_DNXFER_PIO:
3411 highbit = fls(pio_mask) - 1;
3412 pio_mask &= ~(1 << highbit);
3415 case ATA_DNXFER_DMA:
3417 highbit = fls(udma_mask) - 1;
3418 udma_mask &= ~(1 << highbit);
3421 } else if (mwdma_mask) {
3422 highbit = fls(mwdma_mask) - 1;
3423 mwdma_mask &= ~(1 << highbit);
3429 case ATA_DNXFER_40C:
3430 udma_mask &= ATA_UDMA_MASK_40C;
3433 case ATA_DNXFER_FORCE_PIO0:
3436 case ATA_DNXFER_FORCE_PIO:
3445 xfer_mask &= ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask);
3447 if (!(xfer_mask & ATA_MASK_PIO) || xfer_mask == orig_mask)
3451 if (xfer_mask & (ATA_MASK_MWDMA | ATA_MASK_UDMA))
3452 snprintf(buf, sizeof(buf), "%s:%s",
3453 ata_mode_string(xfer_mask),
3454 ata_mode_string(xfer_mask & ATA_MASK_PIO));
3456 snprintf(buf, sizeof(buf), "%s",
3457 ata_mode_string(xfer_mask));
3459 ata_dev_warn(dev, "limiting speed to %s\n", buf);
3462 ata_unpack_xfermask(xfer_mask, &dev->pio_mask, &dev->mwdma_mask,
3468 static int ata_dev_set_mode(struct ata_device *dev)
3470 struct ata_port *ap = dev->link->ap;
3471 struct ata_eh_context *ehc = &dev->link->eh_context;
3472 const bool nosetxfer = dev->horkage & ATA_HORKAGE_NOSETXFER;
3473 const char *dev_err_whine = "";
3474 int ign_dev_err = 0;
3475 unsigned int err_mask = 0;
3478 dev->flags &= ~ATA_DFLAG_PIO;
3479 if (dev->xfer_shift == ATA_SHIFT_PIO)
3480 dev->flags |= ATA_DFLAG_PIO;
3482 if (nosetxfer && ap->flags & ATA_FLAG_SATA && ata_id_is_sata(dev->id))
3483 dev_err_whine = " (SET_XFERMODE skipped)";
3487 "NOSETXFER but PATA detected - can't "
3488 "skip SETXFER, might malfunction\n");
3489 err_mask = ata_dev_set_xfermode(dev);
3492 if (err_mask & ~AC_ERR_DEV)
3496 ehc->i.flags |= ATA_EHI_POST_SETMODE;
3497 rc = ata_dev_revalidate(dev, ATA_DEV_UNKNOWN, 0);
3498 ehc->i.flags &= ~ATA_EHI_POST_SETMODE;
3502 if (dev->xfer_shift == ATA_SHIFT_PIO) {
3503 /* Old CFA may refuse this command, which is just fine */
3504 if (ata_id_is_cfa(dev->id))
3506 /* Catch several broken garbage emulations plus some pre
3508 if (ata_id_major_version(dev->id) == 0 &&
3509 dev->pio_mode <= XFER_PIO_2)
3511 /* Some very old devices and some bad newer ones fail
3512 any kind of SET_XFERMODE request but support PIO0-2
3513 timings and no IORDY */
3514 if (!ata_id_has_iordy(dev->id) && dev->pio_mode <= XFER_PIO_2)
3517 /* Early MWDMA devices do DMA but don't allow DMA mode setting.
3518 Don't fail an MWDMA0 set IFF the device indicates it is in MWDMA0 */
3519 if (dev->xfer_shift == ATA_SHIFT_MWDMA &&
3520 dev->dma_mode == XFER_MW_DMA_0 &&
3521 (dev->id[63] >> 8) & 1)
3524 /* if the device is actually configured correctly, ignore dev err */
3525 if (dev->xfer_mode == ata_xfer_mask2mode(ata_id_xfermask(dev->id)))
3528 if (err_mask & AC_ERR_DEV) {
3532 dev_err_whine = " (device error ignored)";
3535 ata_dev_dbg(dev, "xfer_shift=%u, xfer_mode=0x%x\n",
3536 dev->xfer_shift, (int)dev->xfer_mode);
3538 if (!(ehc->i.flags & ATA_EHI_QUIET) ||
3539 ehc->i.flags & ATA_EHI_DID_HARDRESET)
3540 ata_dev_info(dev, "configured for %s%s\n",
3541 ata_mode_string(ata_xfer_mode2mask(dev->xfer_mode)),
3547 ata_dev_err(dev, "failed to set xfermode (err_mask=0x%x)\n", err_mask);
3552 * ata_do_set_mode - Program timings and issue SET FEATURES - XFER
3553 * @link: link on which timings will be programmed
3554 * @r_failed_dev: out parameter for failed device
3556 * Standard implementation of the function used to tune and set
3557 * ATA device disk transfer mode (PIO3, UDMA6, etc.). If
3558 * ata_dev_set_mode() fails, pointer to the failing device is
3559 * returned in @r_failed_dev.
3562 * PCI/etc. bus probe sem.
3565 * 0 on success, negative errno otherwise
3568 int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev)
3570 struct ata_port *ap = link->ap;
3571 struct ata_device *dev;
3572 int rc = 0, used_dma = 0, found = 0;
3574 /* step 1: calculate xfer_mask */
3575 ata_for_each_dev(dev, link, ENABLED) {
3576 unsigned int pio_mask, dma_mask;
3577 unsigned int mode_mask;
3579 mode_mask = ATA_DMA_MASK_ATA;
3580 if (dev->class == ATA_DEV_ATAPI)
3581 mode_mask = ATA_DMA_MASK_ATAPI;
3582 else if (ata_id_is_cfa(dev->id))
3583 mode_mask = ATA_DMA_MASK_CFA;
3585 ata_dev_xfermask(dev);
3586 ata_force_xfermask(dev);
3588 pio_mask = ata_pack_xfermask(dev->pio_mask, 0, 0);
3590 if (libata_dma_mask & mode_mask)
3591 dma_mask = ata_pack_xfermask(0, dev->mwdma_mask,
3596 dev->pio_mode = ata_xfer_mask2mode(pio_mask);
3597 dev->dma_mode = ata_xfer_mask2mode(dma_mask);
3600 if (ata_dma_enabled(dev))
3606 /* step 2: always set host PIO timings */
3607 ata_for_each_dev(dev, link, ENABLED) {
3608 if (dev->pio_mode == 0xff) {
3609 ata_dev_warn(dev, "no PIO support\n");
3614 dev->xfer_mode = dev->pio_mode;
3615 dev->xfer_shift = ATA_SHIFT_PIO;
3616 if (ap->ops->set_piomode)
3617 ap->ops->set_piomode(ap, dev);
3620 /* step 3: set host DMA timings */
3621 ata_for_each_dev(dev, link, ENABLED) {
3622 if (!ata_dma_enabled(dev))
3625 dev->xfer_mode = dev->dma_mode;
3626 dev->xfer_shift = ata_xfer_mode2shift(dev->dma_mode);
3627 if (ap->ops->set_dmamode)
3628 ap->ops->set_dmamode(ap, dev);
3631 /* step 4: update devices' xfer mode */
3632 ata_for_each_dev(dev, link, ENABLED) {
3633 rc = ata_dev_set_mode(dev);
3638 /* Record simplex status. If we selected DMA then the other
3639 * host channels are not permitted to do so.
3641 if (used_dma && (ap->host->flags & ATA_HOST_SIMPLEX))
3642 ap->host->simplex_claimed = ap;
3646 *r_failed_dev = dev;
3649 EXPORT_SYMBOL_GPL(ata_do_set_mode);
3652 * ata_wait_ready - wait for link to become ready
3653 * @link: link to be waited on
3654 * @deadline: deadline jiffies for the operation
3655 * @check_ready: callback to check link readiness
3657 * Wait for @link to become ready. @check_ready should return
3658 * positive number if @link is ready, 0 if it isn't, -ENODEV if
3659 * link doesn't seem to be occupied, other errno for other error
3662 * Transient -ENODEV conditions are allowed for
3663 * ATA_TMOUT_FF_WAIT.
3669 * 0 if @link is ready before @deadline; otherwise, -errno.
3671 int ata_wait_ready(struct ata_link *link, unsigned long deadline,
3672 int (*check_ready)(struct ata_link *link))
3674 unsigned long start = jiffies;
3675 unsigned long nodev_deadline;
3678 /* choose which 0xff timeout to use, read comment in libata.h */
3679 if (link->ap->host->flags & ATA_HOST_PARALLEL_SCAN)
3680 nodev_deadline = ata_deadline(start, ATA_TMOUT_FF_WAIT_LONG);
3682 nodev_deadline = ata_deadline(start, ATA_TMOUT_FF_WAIT);
3684 /* Slave readiness can't be tested separately from master. On
3685 * M/S emulation configuration, this function should be called
3686 * only on the master and it will handle both master and slave.
3688 WARN_ON(link == link->ap->slave_link);
3690 if (time_after(nodev_deadline, deadline))
3691 nodev_deadline = deadline;
3694 unsigned long now = jiffies;
3697 ready = tmp = check_ready(link);
3702 * -ENODEV could be transient. Ignore -ENODEV if link
3703 * is online. Also, some SATA devices take a long
3704 * time to clear 0xff after reset. Wait for
3705 * ATA_TMOUT_FF_WAIT[_LONG] on -ENODEV if link isn't
3708 * Note that some PATA controllers (pata_ali) explode
3709 * if status register is read more than once when
3710 * there's no device attached.
3712 if (ready == -ENODEV) {
3713 if (ata_link_online(link))
3715 else if ((link->ap->flags & ATA_FLAG_SATA) &&
3716 !ata_link_offline(link) &&
3717 time_before(now, nodev_deadline))
3723 if (time_after(now, deadline))
3726 if (!warned && time_after(now, start + 5 * HZ) &&
3727 (deadline - now > 3 * HZ)) {
3729 "link is slow to respond, please be patient "
3730 "(ready=%d)\n", tmp);
3734 ata_msleep(link->ap, 50);
3739 * ata_wait_after_reset - wait for link to become ready after reset
3740 * @link: link to be waited on
3741 * @deadline: deadline jiffies for the operation
3742 * @check_ready: callback to check link readiness
3744 * Wait for @link to become ready after reset.
3750 * 0 if @link is ready before @deadline; otherwise, -errno.
3752 int ata_wait_after_reset(struct ata_link *link, unsigned long deadline,
3753 int (*check_ready)(struct ata_link *link))
3755 ata_msleep(link->ap, ATA_WAIT_AFTER_RESET);
3757 return ata_wait_ready(link, deadline, check_ready);
3759 EXPORT_SYMBOL_GPL(ata_wait_after_reset);
3762 * ata_std_prereset - prepare for reset
3763 * @link: ATA link to be reset
3764 * @deadline: deadline jiffies for the operation
3766 * @link is about to be reset. Initialize it. Failure from
3767 * prereset makes libata abort whole reset sequence and give up
3768 * that port, so prereset should be best-effort. It does its
3769 * best to prepare for reset sequence but if things go wrong, it
3770 * should just whine, not fail.
3773 * Kernel thread context (may sleep)
3778 int ata_std_prereset(struct ata_link *link, unsigned long deadline)
3780 struct ata_port *ap = link->ap;
3781 struct ata_eh_context *ehc = &link->eh_context;
3782 const unsigned int *timing = sata_ehc_deb_timing(ehc);
3785 /* if we're about to do hardreset, nothing more to do */
3786 if (ehc->i.action & ATA_EH_HARDRESET)
3789 /* if SATA, resume link */
3790 if (ap->flags & ATA_FLAG_SATA) {
3791 rc = sata_link_resume(link, timing, deadline);
3792 /* whine about phy resume failure but proceed */
3793 if (rc && rc != -EOPNOTSUPP)
3795 "failed to resume link for reset (errno=%d)\n",
3799 /* no point in trying softreset on offline link */
3800 if (ata_phys_link_offline(link))
3801 ehc->i.action &= ~ATA_EH_SOFTRESET;
3805 EXPORT_SYMBOL_GPL(ata_std_prereset);
3808 * sata_std_hardreset - COMRESET w/o waiting or classification
3809 * @link: link to reset
3810 * @class: resulting class of attached device
3811 * @deadline: deadline jiffies for the operation
3813 * Standard SATA COMRESET w/o waiting or classification.
3816 * Kernel thread context (may sleep)
3819 * 0 if link offline, -EAGAIN if link online, -errno on errors.
3821 int sata_std_hardreset(struct ata_link *link, unsigned int *class,
3822 unsigned long deadline)
3824 const unsigned int *timing = sata_ehc_deb_timing(&link->eh_context);
3829 rc = sata_link_hardreset(link, timing, deadline, &online, NULL);
3830 return online ? -EAGAIN : rc;
3832 EXPORT_SYMBOL_GPL(sata_std_hardreset);
3835 * ata_std_postreset - standard postreset callback
3836 * @link: the target ata_link
3837 * @classes: classes of attached devices
3839 * This function is invoked after a successful reset. Note that
3840 * the device might have been reset more than once using
3841 * different reset methods before postreset is invoked.
3844 * Kernel thread context (may sleep)
3846 void ata_std_postreset(struct ata_link *link, unsigned int *classes)
3850 /* reset complete, clear SError */
3851 if (!sata_scr_read(link, SCR_ERROR, &serror))
3852 sata_scr_write(link, SCR_ERROR, serror);
3854 /* print link status */
3855 sata_print_link_status(link);
3857 EXPORT_SYMBOL_GPL(ata_std_postreset);
3860 * ata_dev_same_device - Determine whether new ID matches configured device
3861 * @dev: device to compare against
3862 * @new_class: class of the new device
3863 * @new_id: IDENTIFY page of the new device
3865 * Compare @new_class and @new_id against @dev and determine
3866 * whether @dev is the device indicated by @new_class and
3873 * 1 if @dev matches @new_class and @new_id, 0 otherwise.
3875 static int ata_dev_same_device(struct ata_device *dev, unsigned int new_class,
3878 const u16 *old_id = dev->id;
3879 unsigned char model[2][ATA_ID_PROD_LEN + 1];
3880 unsigned char serial[2][ATA_ID_SERNO_LEN + 1];
3882 if (dev->class != new_class) {
3883 ata_dev_info(dev, "class mismatch %d != %d\n",
3884 dev->class, new_class);
3888 ata_id_c_string(old_id, model[0], ATA_ID_PROD, sizeof(model[0]));
3889 ata_id_c_string(new_id, model[1], ATA_ID_PROD, sizeof(model[1]));
3890 ata_id_c_string(old_id, serial[0], ATA_ID_SERNO, sizeof(serial[0]));
3891 ata_id_c_string(new_id, serial[1], ATA_ID_SERNO, sizeof(serial[1]));
3893 if (strcmp(model[0], model[1])) {
3894 ata_dev_info(dev, "model number mismatch '%s' != '%s'\n",
3895 model[0], model[1]);
3899 if (strcmp(serial[0], serial[1])) {
3900 ata_dev_info(dev, "serial number mismatch '%s' != '%s'\n",
3901 serial[0], serial[1]);
3909 * ata_dev_reread_id - Re-read IDENTIFY data
3910 * @dev: target ATA device
3911 * @readid_flags: read ID flags
3913 * Re-read IDENTIFY page and make sure @dev is still attached to
3917 * Kernel thread context (may sleep)
3920 * 0 on success, negative errno otherwise
3922 int ata_dev_reread_id(struct ata_device *dev, unsigned int readid_flags)
3924 unsigned int class = dev->class;
3925 u16 *id = (void *)dev->link->ap->sector_buf;
3929 rc = ata_dev_read_id(dev, &class, readid_flags, id);
3933 /* is the device still there? */
3934 if (!ata_dev_same_device(dev, class, id))
3937 memcpy(dev->id, id, sizeof(id[0]) * ATA_ID_WORDS);
3942 * ata_dev_revalidate - Revalidate ATA device
3943 * @dev: device to revalidate
3944 * @new_class: new class code
3945 * @readid_flags: read ID flags
3947 * Re-read IDENTIFY page, make sure @dev is still attached to the
3948 * port and reconfigure it according to the new IDENTIFY page.
3951 * Kernel thread context (may sleep)
3954 * 0 on success, negative errno otherwise
3956 int ata_dev_revalidate(struct ata_device *dev, unsigned int new_class,
3957 unsigned int readid_flags)
3959 u64 n_sectors = dev->n_sectors;
3960 u64 n_native_sectors = dev->n_native_sectors;
3963 if (!ata_dev_enabled(dev))
3966 /* fail early if !ATA && !ATAPI to avoid issuing [P]IDENTIFY to PMP */
3967 if (ata_class_enabled(new_class) && new_class == ATA_DEV_PMP) {
3968 ata_dev_info(dev, "class mismatch %u != %u\n",
3969 dev->class, new_class);
3975 rc = ata_dev_reread_id(dev, readid_flags);
3979 /* configure device according to the new ID */
3980 rc = ata_dev_configure(dev);
3984 /* verify n_sectors hasn't changed */
3985 if (dev->class != ATA_DEV_ATA || !n_sectors ||
3986 dev->n_sectors == n_sectors)
3989 /* n_sectors has changed */
3990 ata_dev_warn(dev, "n_sectors mismatch %llu != %llu\n",
3991 (unsigned long long)n_sectors,
3992 (unsigned long long)dev->n_sectors);
3995 * Something could have caused HPA to be unlocked
3996 * involuntarily. If n_native_sectors hasn't changed and the
3997 * new size matches it, keep the device.
3999 if (dev->n_native_sectors == n_native_sectors &&
4000 dev->n_sectors > n_sectors && dev->n_sectors == n_native_sectors) {
4002 "new n_sectors matches native, probably "
4003 "late HPA unlock, n_sectors updated\n");
4004 /* use the larger n_sectors */
4009 * Some BIOSes boot w/o HPA but resume w/ HPA locked. Try
4010 * unlocking HPA in those cases.
4012 * https://bugzilla.kernel.org/show_bug.cgi?id=15396
4014 if (dev->n_native_sectors == n_native_sectors &&
4015 dev->n_sectors < n_sectors && n_sectors == n_native_sectors &&
4016 !(dev->horkage & ATA_HORKAGE_BROKEN_HPA)) {
4018 "old n_sectors matches native, probably "
4019 "late HPA lock, will try to unlock HPA\n");
4020 /* try unlocking HPA */
4021 dev->flags |= ATA_DFLAG_UNLOCK_HPA;
4026 /* restore original n_[native_]sectors and fail */
4027 dev->n_native_sectors = n_native_sectors;
4028 dev->n_sectors = n_sectors;
4030 ata_dev_err(dev, "revalidation failed (errno=%d)\n", rc);
4034 struct ata_blacklist_entry {
4035 const char *model_num;
4036 const char *model_rev;
4037 unsigned long horkage;
4040 static const struct ata_blacklist_entry ata_device_blacklist [] = {
4041 /* Devices with DMA related problems under Linux */
4042 { "WDC AC11000H", NULL, ATA_HORKAGE_NODMA },
4043 { "WDC AC22100H", NULL, ATA_HORKAGE_NODMA },
4044 { "WDC AC32500H", NULL, ATA_HORKAGE_NODMA },
4045 { "WDC AC33100H", NULL, ATA_HORKAGE_NODMA },
4046 { "WDC AC31600H", NULL, ATA_HORKAGE_NODMA },
4047 { "WDC AC32100H", "24.09P07", ATA_HORKAGE_NODMA },
4048 { "WDC AC23200L", "21.10N21", ATA_HORKAGE_NODMA },
4049 { "Compaq CRD-8241B", NULL, ATA_HORKAGE_NODMA },
4050 { "CRD-8400B", NULL, ATA_HORKAGE_NODMA },
4051 { "CRD-848[02]B", NULL, ATA_HORKAGE_NODMA },
4052 { "CRD-84", NULL, ATA_HORKAGE_NODMA },
4053 { "SanDisk SDP3B", NULL, ATA_HORKAGE_NODMA },
4054 { "SanDisk SDP3B-64", NULL, ATA_HORKAGE_NODMA },
4055 { "SANYO CD-ROM CRD", NULL, ATA_HORKAGE_NODMA },
4056 { "HITACHI CDR-8", NULL, ATA_HORKAGE_NODMA },
4057 { "HITACHI CDR-8[34]35",NULL, ATA_HORKAGE_NODMA },
4058 { "Toshiba CD-ROM XM-6202B", NULL, ATA_HORKAGE_NODMA },
4059 { "TOSHIBA CD-ROM XM-1702BC", NULL, ATA_HORKAGE_NODMA },
4060 { "CD-532E-A", NULL, ATA_HORKAGE_NODMA },
4061 { "E-IDE CD-ROM CR-840",NULL, ATA_HORKAGE_NODMA },
4062 { "CD-ROM Drive/F5A", NULL, ATA_HORKAGE_NODMA },
4063 { "WPI CDD-820", NULL, ATA_HORKAGE_NODMA },
4064 { "SAMSUNG CD-ROM SC-148C", NULL, ATA_HORKAGE_NODMA },
4065 { "SAMSUNG CD-ROM SC", NULL, ATA_HORKAGE_NODMA },
4066 { "ATAPI CD-ROM DRIVE 40X MAXIMUM",NULL,ATA_HORKAGE_NODMA },
4067 { "_NEC DV5800A", NULL, ATA_HORKAGE_NODMA },
4068 { "SAMSUNG CD-ROM SN-124", "N001", ATA_HORKAGE_NODMA },
4069 { "Seagate STT20000A", NULL, ATA_HORKAGE_NODMA },
4070 { " 2GB ATA Flash Disk", "ADMA428M", ATA_HORKAGE_NODMA },
4071 { "VRFDFC22048UCHC-TE*", NULL, ATA_HORKAGE_NODMA },
4072 /* Odd clown on sil3726/4726 PMPs */
4073 { "Config Disk", NULL, ATA_HORKAGE_DISABLE },
4074 /* Similar story with ASMedia 1092 */
4075 { "ASMT109x- Config", NULL, ATA_HORKAGE_DISABLE },
4077 /* Weird ATAPI devices */
4078 { "TORiSAN DVD-ROM DRD-N216", NULL, ATA_HORKAGE_MAX_SEC_128 },
4079 { "QUANTUM DAT DAT72-000", NULL, ATA_HORKAGE_ATAPI_MOD16_DMA },
4080 { "Slimtype DVD A DS8A8SH", NULL, ATA_HORKAGE_MAX_SEC_LBA48 },
4081 { "Slimtype DVD A DS8A9SH", NULL, ATA_HORKAGE_MAX_SEC_LBA48 },
4084 * Causes silent data corruption with higher max sects.
4085 * http://lkml.kernel.org/g/x49wpy40ysk.fsf@segfault.boston.devel.redhat.com
4087 { "ST380013AS", "3.20", ATA_HORKAGE_MAX_SEC_1024 },
4090 * These devices time out with higher max sects.
4091 * https://bugzilla.kernel.org/show_bug.cgi?id=121671
4093 { "LITEON CX1-JB*-HP", NULL, ATA_HORKAGE_MAX_SEC_1024 },
4094 { "LITEON EP1-*", NULL, ATA_HORKAGE_MAX_SEC_1024 },
4096 /* Devices we expect to fail diagnostics */
4098 /* Devices where NCQ should be avoided */
4100 { "WDC WD740ADFD-00", NULL, ATA_HORKAGE_NONCQ },
4101 { "WDC WD740ADFD-00NLR1", NULL, ATA_HORKAGE_NONCQ },
4102 /* http://thread.gmane.org/gmane.linux.ide/14907 */
4103 { "FUJITSU MHT2060BH", NULL, ATA_HORKAGE_NONCQ },
4105 { "Maxtor *", "BANC*", ATA_HORKAGE_NONCQ },
4106 { "Maxtor 7V300F0", "VA111630", ATA_HORKAGE_NONCQ },
4107 { "ST380817AS", "3.42", ATA_HORKAGE_NONCQ },
4108 { "ST3160023AS", "3.42", ATA_HORKAGE_NONCQ },
4109 { "OCZ CORE_SSD", "02.10104", ATA_HORKAGE_NONCQ },
4111 /* Seagate NCQ + FLUSH CACHE firmware bug */
4112 { "ST31500341AS", "SD1[5-9]", ATA_HORKAGE_NONCQ |
4113 ATA_HORKAGE_FIRMWARE_WARN },
4115 { "ST31000333AS", "SD1[5-9]", ATA_HORKAGE_NONCQ |
4116 ATA_HORKAGE_FIRMWARE_WARN },
4118 { "ST3640[36]23AS", "SD1[5-9]", ATA_HORKAGE_NONCQ |
4119 ATA_HORKAGE_FIRMWARE_WARN },
4121 { "ST3320[68]13AS", "SD1[5-9]", ATA_HORKAGE_NONCQ |
4122 ATA_HORKAGE_FIRMWARE_WARN },
4124 /* drives which fail FPDMA_AA activation (some may freeze afterwards)
4125 the ST disks also have LPM issues */
4126 { "ST1000LM024 HN-M101MBB", NULL, ATA_HORKAGE_BROKEN_FPDMA_AA |
4127 ATA_HORKAGE_NOLPM },
4128 { "VB0250EAVER", "HPG7", ATA_HORKAGE_BROKEN_FPDMA_AA },
4130 /* Blacklist entries taken from Silicon Image 3124/3132
4131 Windows driver .inf file - also several Linux problem reports */
4132 { "HTS541060G9SA00", "MB3OC60D", ATA_HORKAGE_NONCQ },
4133 { "HTS541080G9SA00", "MB4OC60D", ATA_HORKAGE_NONCQ },
4134 { "HTS541010G9SA00", "MBZOC60D", ATA_HORKAGE_NONCQ },
4136 /* https://bugzilla.kernel.org/show_bug.cgi?id=15573 */
4137 { "C300-CTFDDAC128MAG", "0001", ATA_HORKAGE_NONCQ },
4139 /* Sandisk SD7/8/9s lock up hard on large trims */
4140 { "SanDisk SD[789]*", NULL, ATA_HORKAGE_MAX_TRIM_128M },
4142 /* devices which puke on READ_NATIVE_MAX */
4143 { "HDS724040KLSA80", "KFAOA20N", ATA_HORKAGE_BROKEN_HPA },
4144 { "WDC WD3200JD-00KLB0", "WD-WCAMR1130137", ATA_HORKAGE_BROKEN_HPA },
4145 { "WDC WD2500JD-00HBB0", "WD-WMAL71490727", ATA_HORKAGE_BROKEN_HPA },
4146 { "MAXTOR 6L080L4", "A93.0500", ATA_HORKAGE_BROKEN_HPA },
4148 /* this one allows HPA unlocking but fails IOs on the area */
4149 { "OCZ-VERTEX", "1.30", ATA_HORKAGE_BROKEN_HPA },
4151 /* Devices which report 1 sector over size HPA */
4152 { "ST340823A", NULL, ATA_HORKAGE_HPA_SIZE },
4153 { "ST320413A", NULL, ATA_HORKAGE_HPA_SIZE },
4154 { "ST310211A", NULL, ATA_HORKAGE_HPA_SIZE },
4156 /* Devices which get the IVB wrong */
4157 { "QUANTUM FIREBALLlct10 05", "A03.0900", ATA_HORKAGE_IVB },
4158 /* Maybe we should just blacklist TSSTcorp... */
4159 { "TSSTcorp CDDVDW SH-S202[HJN]", "SB0[01]", ATA_HORKAGE_IVB },
4161 /* Devices that do not need bridging limits applied */
4162 { "MTRON MSP-SATA*", NULL, ATA_HORKAGE_BRIDGE_OK },
4163 { "BUFFALO HD-QSU2/R5", NULL, ATA_HORKAGE_BRIDGE_OK },
4165 /* Devices which aren't very happy with higher link speeds */
4166 { "WD My Book", NULL, ATA_HORKAGE_1_5_GBPS },
4167 { "Seagate FreeAgent GoFlex", NULL, ATA_HORKAGE_1_5_GBPS },
4170 * Devices which choke on SETXFER. Applies only if both the
4171 * device and controller are SATA.
4173 { "PIONEER DVD-RW DVRTD08", NULL, ATA_HORKAGE_NOSETXFER },
4174 { "PIONEER DVD-RW DVRTD08A", NULL, ATA_HORKAGE_NOSETXFER },
4175 { "PIONEER DVD-RW DVR-215", NULL, ATA_HORKAGE_NOSETXFER },
4176 { "PIONEER DVD-RW DVR-212D", NULL, ATA_HORKAGE_NOSETXFER },
4177 { "PIONEER DVD-RW DVR-216D", NULL, ATA_HORKAGE_NOSETXFER },
4179 /* These specific Pioneer models have LPM issues */
4180 { "PIONEER BD-RW BDR-207M", NULL, ATA_HORKAGE_NOLPM },
4181 { "PIONEER BD-RW BDR-205", NULL, ATA_HORKAGE_NOLPM },
4183 /* Crucial BX100 SSD 500GB has broken LPM support */
4184 { "CT500BX100SSD1", NULL, ATA_HORKAGE_NOLPM },
4186 /* 512GB MX100 with MU01 firmware has both queued TRIM and LPM issues */
4187 { "Crucial_CT512MX100*", "MU01", ATA_HORKAGE_NO_NCQ_TRIM |
4188 ATA_HORKAGE_ZERO_AFTER_TRIM |
4189 ATA_HORKAGE_NOLPM },
4190 /* 512GB MX100 with newer firmware has only LPM issues */
4191 { "Crucial_CT512MX100*", NULL, ATA_HORKAGE_ZERO_AFTER_TRIM |
4192 ATA_HORKAGE_NOLPM },
4194 /* 480GB+ M500 SSDs have both queued TRIM and LPM issues */
4195 { "Crucial_CT480M500*", NULL, ATA_HORKAGE_NO_NCQ_TRIM |
4196 ATA_HORKAGE_ZERO_AFTER_TRIM |
4197 ATA_HORKAGE_NOLPM },
4198 { "Crucial_CT960M500*", NULL, ATA_HORKAGE_NO_NCQ_TRIM |
4199 ATA_HORKAGE_ZERO_AFTER_TRIM |
4200 ATA_HORKAGE_NOLPM },
4202 /* These specific Samsung models/firmware-revs do not handle LPM well */
4203 { "SAMSUNG MZMPC128HBFU-000MV", "CXM14M1Q", ATA_HORKAGE_NOLPM },
4204 { "SAMSUNG SSD PM830 mSATA *", "CXM13D1Q", ATA_HORKAGE_NOLPM },
4205 { "SAMSUNG MZ7TD256HAFV-000L9", NULL, ATA_HORKAGE_NOLPM },
4206 { "SAMSUNG MZ7TE512HMHP-000L1", "EXT06L0Q", ATA_HORKAGE_NOLPM },
4208 /* devices that don't properly handle queued TRIM commands */
4209 { "Micron_M500IT_*", "MU01", ATA_HORKAGE_NO_NCQ_TRIM |
4210 ATA_HORKAGE_ZERO_AFTER_TRIM },
4211 { "Micron_M500_*", NULL, ATA_HORKAGE_NO_NCQ_TRIM |
4212 ATA_HORKAGE_ZERO_AFTER_TRIM },
4213 { "Micron_M5[15]0_*", "MU01", ATA_HORKAGE_NO_NCQ_TRIM |
4214 ATA_HORKAGE_ZERO_AFTER_TRIM },
4215 { "Micron_1100_*", NULL, ATA_HORKAGE_NO_NCQ_TRIM |
4216 ATA_HORKAGE_ZERO_AFTER_TRIM, },
4217 { "Crucial_CT*M500*", NULL, ATA_HORKAGE_NO_NCQ_TRIM |
4218 ATA_HORKAGE_ZERO_AFTER_TRIM },
4219 { "Crucial_CT*M550*", "MU01", ATA_HORKAGE_NO_NCQ_TRIM |
4220 ATA_HORKAGE_ZERO_AFTER_TRIM },
4221 { "Crucial_CT*MX100*", "MU01", ATA_HORKAGE_NO_NCQ_TRIM |
4222 ATA_HORKAGE_ZERO_AFTER_TRIM },
4223 { "Samsung SSD 840 EVO*", NULL, ATA_HORKAGE_NO_NCQ_TRIM |
4224 ATA_HORKAGE_NO_DMA_LOG |
4225 ATA_HORKAGE_ZERO_AFTER_TRIM },
4226 { "Samsung SSD 840*", NULL, ATA_HORKAGE_NO_NCQ_TRIM |
4227 ATA_HORKAGE_ZERO_AFTER_TRIM },
4228 { "Samsung SSD 850*", NULL, ATA_HORKAGE_NO_NCQ_TRIM |
4229 ATA_HORKAGE_ZERO_AFTER_TRIM },
4230 { "Samsung SSD 860*", NULL, ATA_HORKAGE_NO_NCQ_TRIM |
4231 ATA_HORKAGE_ZERO_AFTER_TRIM |
4232 ATA_HORKAGE_NO_NCQ_ON_ATI },
4233 { "Samsung SSD 870*", NULL, ATA_HORKAGE_NO_NCQ_TRIM |
4234 ATA_HORKAGE_ZERO_AFTER_TRIM |
4235 ATA_HORKAGE_NO_NCQ_ON_ATI },
4236 { "SAMSUNG*MZ7LH*", NULL, ATA_HORKAGE_NO_NCQ_TRIM |
4237 ATA_HORKAGE_ZERO_AFTER_TRIM |
4238 ATA_HORKAGE_NO_NCQ_ON_ATI, },
4239 { "FCCT*M500*", NULL, ATA_HORKAGE_NO_NCQ_TRIM |
4240 ATA_HORKAGE_ZERO_AFTER_TRIM },
4242 /* devices that don't properly handle TRIM commands */
4243 { "SuperSSpeed S238*", NULL, ATA_HORKAGE_NOTRIM },
4244 { "M88V29*", NULL, ATA_HORKAGE_NOTRIM },
4247 * As defined, the DRAT (Deterministic Read After Trim) and RZAT
4248 * (Return Zero After Trim) flags in the ATA Command Set are
4249 * unreliable in the sense that they only define what happens if
4250 * the device successfully executed the DSM TRIM command. TRIM
4251 * is only advisory, however, and the device is free to silently
4252 * ignore all or parts of the request.
4254 * Whitelist drives that are known to reliably return zeroes
4259 * The intel 510 drive has buggy DRAT/RZAT. Explicitly exclude
4260 * that model before whitelisting all other intel SSDs.
4262 { "INTEL*SSDSC2MH*", NULL, 0 },
4264 { "Micron*", NULL, ATA_HORKAGE_ZERO_AFTER_TRIM },
4265 { "Crucial*", NULL, ATA_HORKAGE_ZERO_AFTER_TRIM },
4266 { "INTEL*SSD*", NULL, ATA_HORKAGE_ZERO_AFTER_TRIM },
4267 { "SSD*INTEL*", NULL, ATA_HORKAGE_ZERO_AFTER_TRIM },
4268 { "Samsung*SSD*", NULL, ATA_HORKAGE_ZERO_AFTER_TRIM },
4269 { "SAMSUNG*SSD*", NULL, ATA_HORKAGE_ZERO_AFTER_TRIM },
4270 { "SAMSUNG*MZ7KM*", NULL, ATA_HORKAGE_ZERO_AFTER_TRIM },
4271 { "ST[1248][0248]0[FH]*", NULL, ATA_HORKAGE_ZERO_AFTER_TRIM },
4274 * Some WD SATA-I drives spin up and down erratically when the link
4275 * is put into the slumber mode. We don't have full list of the
4276 * affected devices. Disable LPM if the device matches one of the
4277 * known prefixes and is SATA-1. As a side effect LPM partial is
4280 * https://bugzilla.kernel.org/show_bug.cgi?id=57211
4282 { "WDC WD800JD-*", NULL, ATA_HORKAGE_WD_BROKEN_LPM },
4283 { "WDC WD1200JD-*", NULL, ATA_HORKAGE_WD_BROKEN_LPM },
4284 { "WDC WD1600JD-*", NULL, ATA_HORKAGE_WD_BROKEN_LPM },
4285 { "WDC WD2000JD-*", NULL, ATA_HORKAGE_WD_BROKEN_LPM },
4286 { "WDC WD2500JD-*", NULL, ATA_HORKAGE_WD_BROKEN_LPM },
4287 { "WDC WD3000JD-*", NULL, ATA_HORKAGE_WD_BROKEN_LPM },
4288 { "WDC WD3200JD-*", NULL, ATA_HORKAGE_WD_BROKEN_LPM },
4291 * This sata dom device goes on a walkabout when the ATA_LOG_DIRECTORY
4292 * log page is accessed. Ensure we never ask for this log page with
4295 { "SATADOM-ML 3ME", NULL, ATA_HORKAGE_NO_LOG_DIR },
4298 { "Maxtor", "BANC1G10", ATA_HORKAGE_NO_FUA },
4299 { "WDC*WD2500J*", NULL, ATA_HORKAGE_NO_FUA },
4300 { "OCZ-VERTEX*", NULL, ATA_HORKAGE_NO_FUA },
4301 { "INTEL*SSDSC2CT*", NULL, ATA_HORKAGE_NO_FUA },
4307 static unsigned long ata_dev_blacklisted(const struct ata_device *dev)
4309 unsigned char model_num[ATA_ID_PROD_LEN + 1];
4310 unsigned char model_rev[ATA_ID_FW_REV_LEN + 1];
4311 const struct ata_blacklist_entry *ad = ata_device_blacklist;
4313 ata_id_c_string(dev->id, model_num, ATA_ID_PROD, sizeof(model_num));
4314 ata_id_c_string(dev->id, model_rev, ATA_ID_FW_REV, sizeof(model_rev));
4316 while (ad->model_num) {
4317 if (glob_match(ad->model_num, model_num)) {
4318 if (ad->model_rev == NULL)
4320 if (glob_match(ad->model_rev, model_rev))
4328 static int ata_dma_blacklisted(const struct ata_device *dev)
4330 /* We don't support polling DMA.
4331 * DMA blacklist those ATAPI devices with CDB-intr (and use PIO)
4332 * if the LLDD handles only interrupts in the HSM_ST_LAST state.
4334 if ((dev->link->ap->flags & ATA_FLAG_PIO_POLLING) &&
4335 (dev->flags & ATA_DFLAG_CDB_INTR))
4337 return (dev->horkage & ATA_HORKAGE_NODMA) ? 1 : 0;
4341 * ata_is_40wire - check drive side detection
4344 * Perform drive side detection decoding, allowing for device vendors
4345 * who can't follow the documentation.
4348 static int ata_is_40wire(struct ata_device *dev)
4350 if (dev->horkage & ATA_HORKAGE_IVB)
4351 return ata_drive_40wire_relaxed(dev->id);
4352 return ata_drive_40wire(dev->id);
4356 * cable_is_40wire - 40/80/SATA decider
4357 * @ap: port to consider
4359 * This function encapsulates the policy for speed management
4360 * in one place. At the moment we don't cache the result but
4361 * there is a good case for setting ap->cbl to the result when
4362 * we are called with unknown cables (and figuring out if it
4363 * impacts hotplug at all).
4365 * Return 1 if the cable appears to be 40 wire.
4368 static int cable_is_40wire(struct ata_port *ap)
4370 struct ata_link *link;
4371 struct ata_device *dev;
4373 /* If the controller thinks we are 40 wire, we are. */
4374 if (ap->cbl == ATA_CBL_PATA40)
4377 /* If the controller thinks we are 80 wire, we are. */
4378 if (ap->cbl == ATA_CBL_PATA80 || ap->cbl == ATA_CBL_SATA)
4381 /* If the system is known to be 40 wire short cable (eg
4382 * laptop), then we allow 80 wire modes even if the drive
4385 if (ap->cbl == ATA_CBL_PATA40_SHORT)
4388 /* If the controller doesn't know, we scan.
4390 * Note: We look for all 40 wire detects at this point. Any
4391 * 80 wire detect is taken to be 80 wire cable because
4392 * - in many setups only the one drive (slave if present) will
4393 * give a valid detect
4394 * - if you have a non detect capable drive you don't want it
4395 * to colour the choice
4397 ata_for_each_link(link, ap, EDGE) {
4398 ata_for_each_dev(dev, link, ENABLED) {
4399 if (!ata_is_40wire(dev))
4407 * ata_dev_xfermask - Compute supported xfermask of the given device
4408 * @dev: Device to compute xfermask for
4410 * Compute supported xfermask of @dev and store it in
4411 * dev->*_mask. This function is responsible for applying all
4412 * known limits including host controller limits, device
4418 static void ata_dev_xfermask(struct ata_device *dev)
4420 struct ata_link *link = dev->link;
4421 struct ata_port *ap = link->ap;
4422 struct ata_host *host = ap->host;
4423 unsigned int xfer_mask;
4425 /* controller modes available */
4426 xfer_mask = ata_pack_xfermask(ap->pio_mask,
4427 ap->mwdma_mask, ap->udma_mask);
4429 /* drive modes available */
4430 xfer_mask &= ata_pack_xfermask(dev->pio_mask,
4431 dev->mwdma_mask, dev->udma_mask);
4432 xfer_mask &= ata_id_xfermask(dev->id);
4435 * CFA Advanced TrueIDE timings are not allowed on a shared
4438 if (ata_dev_pair(dev)) {
4439 /* No PIO5 or PIO6 */
4440 xfer_mask &= ~(0x03 << (ATA_SHIFT_PIO + 5));
4441 /* No MWDMA3 or MWDMA 4 */
4442 xfer_mask &= ~(0x03 << (ATA_SHIFT_MWDMA + 3));
4445 if (ata_dma_blacklisted(dev)) {
4446 xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA);
4448 "device is on DMA blacklist, disabling DMA\n");
4451 if ((host->flags & ATA_HOST_SIMPLEX) &&
4452 host->simplex_claimed && host->simplex_claimed != ap) {
4453 xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA);
4455 "simplex DMA is claimed by other device, disabling DMA\n");
4458 if (ap->flags & ATA_FLAG_NO_IORDY)
4459 xfer_mask &= ata_pio_mask_no_iordy(dev);
4461 if (ap->ops->mode_filter)
4462 xfer_mask = ap->ops->mode_filter(dev, xfer_mask);
4464 /* Apply cable rule here. Don't apply it early because when
4465 * we handle hot plug the cable type can itself change.
4466 * Check this last so that we know if the transfer rate was
4467 * solely limited by the cable.
4468 * Unknown or 80 wire cables reported host side are checked
4469 * drive side as well. Cases where we know a 40wire cable
4470 * is used safely for 80 are not checked here.
4472 if (xfer_mask & (0xF8 << ATA_SHIFT_UDMA))
4473 /* UDMA/44 or higher would be available */
4474 if (cable_is_40wire(ap)) {
4476 "limited to UDMA/33 due to 40-wire cable\n");
4477 xfer_mask &= ~(0xF8 << ATA_SHIFT_UDMA);
4480 ata_unpack_xfermask(xfer_mask, &dev->pio_mask,
4481 &dev->mwdma_mask, &dev->udma_mask);
4485 * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command
4486 * @dev: Device to which command will be sent
4488 * Issue SET FEATURES - XFER MODE command to device @dev
4492 * PCI/etc. bus probe sem.
4495 * 0 on success, AC_ERR_* mask otherwise.
4498 static unsigned int ata_dev_set_xfermode(struct ata_device *dev)
4500 struct ata_taskfile tf;
4502 /* set up set-features taskfile */
4503 ata_dev_dbg(dev, "set features - xfer mode\n");
4505 /* Some controllers and ATAPI devices show flaky interrupt
4506 * behavior after setting xfer mode. Use polling instead.
4508 ata_tf_init(dev, &tf);
4509 tf.command = ATA_CMD_SET_FEATURES;
4510 tf.feature = SETFEATURES_XFER;
4511 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_POLLING;
4512 tf.protocol = ATA_PROT_NODATA;
4513 /* If we are using IORDY we must send the mode setting command */
4514 if (ata_pio_need_iordy(dev))
4515 tf.nsect = dev->xfer_mode;
4516 /* If the device has IORDY and the controller does not - turn it off */
4517 else if (ata_id_has_iordy(dev->id))
4519 else /* In the ancient relic department - skip all of this */
4523 * On some disks, this command causes spin-up, so we need longer
4526 return ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 15000);
4530 * ata_dev_set_feature - Issue SET FEATURES
4531 * @dev: Device to which command will be sent
4532 * @subcmd: The SET FEATURES subcommand to be sent
4533 * @action: The sector count represents a subcommand specific action
4535 * Issue SET FEATURES command to device @dev on port @ap with sector count
4538 * PCI/etc. bus probe sem.
4541 * 0 on success, AC_ERR_* mask otherwise.
4543 unsigned int ata_dev_set_feature(struct ata_device *dev, u8 subcmd, u8 action)
4545 struct ata_taskfile tf;
4546 unsigned int timeout = 0;
4548 /* set up set-features taskfile */
4549 ata_dev_dbg(dev, "set features\n");
4551 ata_tf_init(dev, &tf);
4552 tf.command = ATA_CMD_SET_FEATURES;
4553 tf.feature = subcmd;
4554 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
4555 tf.protocol = ATA_PROT_NODATA;
4558 if (subcmd == SETFEATURES_SPINUP)
4559 timeout = ata_probe_timeout ?
4560 ata_probe_timeout * 1000 : SETFEATURES_SPINUP_TIMEOUT;
4562 return ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, timeout);
4564 EXPORT_SYMBOL_GPL(ata_dev_set_feature);
4567 * ata_dev_init_params - Issue INIT DEV PARAMS command
4568 * @dev: Device to which command will be sent
4569 * @heads: Number of heads (taskfile parameter)
4570 * @sectors: Number of sectors (taskfile parameter)
4573 * Kernel thread context (may sleep)
4576 * 0 on success, AC_ERR_* mask otherwise.
4578 static unsigned int ata_dev_init_params(struct ata_device *dev,
4579 u16 heads, u16 sectors)
4581 struct ata_taskfile tf;
4582 unsigned int err_mask;
4584 /* Number of sectors per track 1-255. Number of heads 1-16 */
4585 if (sectors < 1 || sectors > 255 || heads < 1 || heads > 16)
4586 return AC_ERR_INVALID;
4588 /* set up init dev params taskfile */
4589 ata_dev_dbg(dev, "init dev params \n");
4591 ata_tf_init(dev, &tf);
4592 tf.command = ATA_CMD_INIT_DEV_PARAMS;
4593 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
4594 tf.protocol = ATA_PROT_NODATA;
4596 tf.device |= (heads - 1) & 0x0f; /* max head = num. of heads - 1 */
4598 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
4599 /* A clean abort indicates an original or just out of spec drive
4600 and we should continue as we issue the setup based on the
4601 drive reported working geometry */
4602 if (err_mask == AC_ERR_DEV && (tf.error & ATA_ABORTED))
4609 * atapi_check_dma - Check whether ATAPI DMA can be supported
4610 * @qc: Metadata associated with taskfile to check
4612 * Allow low-level driver to filter ATA PACKET commands, returning
4613 * a status indicating whether or not it is OK to use DMA for the
4614 * supplied PACKET command.
4617 * spin_lock_irqsave(host lock)
4619 * RETURNS: 0 when ATAPI DMA can be used
4622 int atapi_check_dma(struct ata_queued_cmd *qc)
4624 struct ata_port *ap = qc->ap;
4626 /* Don't allow DMA if it isn't multiple of 16 bytes. Quite a
4627 * few ATAPI devices choke on such DMA requests.
4629 if (!(qc->dev->horkage & ATA_HORKAGE_ATAPI_MOD16_DMA) &&
4630 unlikely(qc->nbytes & 15))
4633 if (ap->ops->check_atapi_dma)
4634 return ap->ops->check_atapi_dma(qc);
4640 * ata_std_qc_defer - Check whether a qc needs to be deferred
4641 * @qc: ATA command in question
4643 * Non-NCQ commands cannot run with any other command, NCQ or
4644 * not. As upper layer only knows the queue depth, we are
4645 * responsible for maintaining exclusion. This function checks
4646 * whether a new command @qc can be issued.
4649 * spin_lock_irqsave(host lock)
4652 * ATA_DEFER_* if deferring is needed, 0 otherwise.
4654 int ata_std_qc_defer(struct ata_queued_cmd *qc)
4656 struct ata_link *link = qc->dev->link;
4658 if (ata_is_ncq(qc->tf.protocol)) {
4659 if (!ata_tag_valid(link->active_tag))
4662 if (!ata_tag_valid(link->active_tag) && !link->sactive)
4666 return ATA_DEFER_LINK;
4668 EXPORT_SYMBOL_GPL(ata_std_qc_defer);
4670 enum ata_completion_errors ata_noop_qc_prep(struct ata_queued_cmd *qc)
4674 EXPORT_SYMBOL_GPL(ata_noop_qc_prep);
4677 * ata_sg_init - Associate command with scatter-gather table.
4678 * @qc: Command to be associated
4679 * @sg: Scatter-gather table.
4680 * @n_elem: Number of elements in s/g table.
4682 * Initialize the data-related elements of queued_cmd @qc
4683 * to point to a scatter-gather table @sg, containing @n_elem
4687 * spin_lock_irqsave(host lock)
4689 void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
4690 unsigned int n_elem)
4693 qc->n_elem = n_elem;
4697 #ifdef CONFIG_HAS_DMA
4700 * ata_sg_clean - Unmap DMA memory associated with command
4701 * @qc: Command containing DMA memory to be released
4703 * Unmap all mapped DMA memory associated with this command.
4706 * spin_lock_irqsave(host lock)
4708 static void ata_sg_clean(struct ata_queued_cmd *qc)
4710 struct ata_port *ap = qc->ap;
4711 struct scatterlist *sg = qc->sg;
4712 int dir = qc->dma_dir;
4714 WARN_ON_ONCE(sg == NULL);
4717 dma_unmap_sg(ap->dev, sg, qc->orig_n_elem, dir);
4719 qc->flags &= ~ATA_QCFLAG_DMAMAP;
4724 * ata_sg_setup - DMA-map the scatter-gather table associated with a command.
4725 * @qc: Command with scatter-gather table to be mapped.
4727 * DMA-map the scatter-gather table associated with queued_cmd @qc.
4730 * spin_lock_irqsave(host lock)
4733 * Zero on success, negative on error.
4736 static int ata_sg_setup(struct ata_queued_cmd *qc)
4738 struct ata_port *ap = qc->ap;
4739 unsigned int n_elem;
4741 n_elem = dma_map_sg(ap->dev, qc->sg, qc->n_elem, qc->dma_dir);
4745 qc->orig_n_elem = qc->n_elem;
4746 qc->n_elem = n_elem;
4747 qc->flags |= ATA_QCFLAG_DMAMAP;
4752 #else /* !CONFIG_HAS_DMA */
4754 static inline void ata_sg_clean(struct ata_queued_cmd *qc) {}
4755 static inline int ata_sg_setup(struct ata_queued_cmd *qc) { return -1; }
4757 #endif /* !CONFIG_HAS_DMA */
4760 * swap_buf_le16 - swap halves of 16-bit words in place
4761 * @buf: Buffer to swap
4762 * @buf_words: Number of 16-bit words in buffer.
4764 * Swap halves of 16-bit words if needed to convert from
4765 * little-endian byte order to native cpu byte order, or
4769 * Inherited from caller.
4771 void swap_buf_le16(u16 *buf, unsigned int buf_words)
4776 for (i = 0; i < buf_words; i++)
4777 buf[i] = le16_to_cpu(buf[i]);
4778 #endif /* __BIG_ENDIAN */
4782 * ata_qc_free - free unused ata_queued_cmd
4783 * @qc: Command to complete
4785 * Designed to free unused ata_queued_cmd object
4786 * in case something prevents using it.
4789 * spin_lock_irqsave(host lock)
4791 void ata_qc_free(struct ata_queued_cmd *qc)
4794 if (ata_tag_valid(qc->tag))
4795 qc->tag = ATA_TAG_POISON;
4798 void __ata_qc_complete(struct ata_queued_cmd *qc)
4800 struct ata_port *ap;
4801 struct ata_link *link;
4803 WARN_ON_ONCE(qc == NULL); /* ata_qc_from_tag _might_ return NULL */
4804 WARN_ON_ONCE(!(qc->flags & ATA_QCFLAG_ACTIVE));
4806 link = qc->dev->link;
4808 if (likely(qc->flags & ATA_QCFLAG_DMAMAP))
4811 /* command should be marked inactive atomically with qc completion */
4812 if (ata_is_ncq(qc->tf.protocol)) {
4813 link->sactive &= ~(1 << qc->hw_tag);
4815 ap->nr_active_links--;
4817 link->active_tag = ATA_TAG_POISON;
4818 ap->nr_active_links--;
4821 /* clear exclusive status */
4822 if (unlikely(qc->flags & ATA_QCFLAG_CLEAR_EXCL &&
4823 ap->excl_link == link))
4824 ap->excl_link = NULL;
4826 /* atapi: mark qc as inactive to prevent the interrupt handler
4827 * from completing the command twice later, before the error handler
4828 * is called. (when rc != 0 and atapi request sense is needed)
4830 qc->flags &= ~ATA_QCFLAG_ACTIVE;
4831 ap->qc_active &= ~(1ULL << qc->tag);
4833 /* call completion callback */
4834 qc->complete_fn(qc);
4837 static void fill_result_tf(struct ata_queued_cmd *qc)
4839 struct ata_port *ap = qc->ap;
4841 qc->result_tf.flags = qc->tf.flags;
4842 ap->ops->qc_fill_rtf(qc);
4845 static void ata_verify_xfer(struct ata_queued_cmd *qc)
4847 struct ata_device *dev = qc->dev;
4849 if (!ata_is_data(qc->tf.protocol))
4852 if ((dev->mwdma_mask || dev->udma_mask) && ata_is_pio(qc->tf.protocol))
4855 dev->flags &= ~ATA_DFLAG_DUBIOUS_XFER;
4859 * ata_qc_complete - Complete an active ATA command
4860 * @qc: Command to complete
4862 * Indicate to the mid and upper layers that an ATA command has
4863 * completed, with either an ok or not-ok status.
4865 * Refrain from calling this function multiple times when
4866 * successfully completing multiple NCQ commands.
4867 * ata_qc_complete_multiple() should be used instead, which will
4868 * properly update IRQ expect state.
4871 * spin_lock_irqsave(host lock)
4873 void ata_qc_complete(struct ata_queued_cmd *qc)
4875 struct ata_port *ap = qc->ap;
4876 struct ata_device *dev = qc->dev;
4877 struct ata_eh_info *ehi = &dev->link->eh_info;
4879 /* Trigger the LED (if available) */
4880 ledtrig_disk_activity(!!(qc->tf.flags & ATA_TFLAG_WRITE));
4883 * In order to synchronize EH with the regular execution path, a qc that
4884 * is owned by EH is marked with ATA_QCFLAG_EH.
4886 * The normal execution path is responsible for not accessing a qc owned
4887 * by EH. libata core enforces the rule by returning NULL from
4888 * ata_qc_from_tag() for qcs owned by EH.
4890 if (unlikely(qc->err_mask))
4891 qc->flags |= ATA_QCFLAG_EH;
4894 * Finish internal commands without any further processing and always
4895 * with the result TF filled.
4897 if (unlikely(ata_tag_internal(qc->tag))) {
4899 trace_ata_qc_complete_internal(qc);
4900 __ata_qc_complete(qc);
4904 /* Non-internal qc has failed. Fill the result TF and summon EH. */
4905 if (unlikely(qc->flags & ATA_QCFLAG_EH)) {
4907 trace_ata_qc_complete_failed(qc);
4908 ata_qc_schedule_eh(qc);
4912 WARN_ON_ONCE(ata_port_is_frozen(ap));
4914 /* read result TF if requested */
4915 if (qc->flags & ATA_QCFLAG_RESULT_TF)
4918 trace_ata_qc_complete_done(qc);
4921 * For CDL commands that completed without an error, check if we have
4922 * sense data (ATA_SENSE is set). If we do, then the command may have
4923 * been aborted by the device due to a limit timeout using the policy
4924 * 0xD. For these commands, invoke EH to get the command sense data.
4926 if (qc->flags & ATA_QCFLAG_HAS_CDL &&
4927 qc->result_tf.status & ATA_SENSE) {
4929 * Tell SCSI EH to not overwrite scmd->result even if this
4930 * command is finished with result SAM_STAT_GOOD.
4932 qc->scsicmd->flags |= SCMD_FORCE_EH_SUCCESS;
4933 qc->flags |= ATA_QCFLAG_EH_SUCCESS_CMD;
4934 ehi->dev_action[dev->devno] |= ATA_EH_GET_SUCCESS_SENSE;
4937 * set pending so that ata_qc_schedule_eh() does not trigger
4938 * fast drain, and freeze the port.
4940 ap->pflags |= ATA_PFLAG_EH_PENDING;
4941 ata_qc_schedule_eh(qc);
4945 /* Some commands need post-processing after successful completion. */
4946 switch (qc->tf.command) {
4947 case ATA_CMD_SET_FEATURES:
4948 if (qc->tf.feature != SETFEATURES_WC_ON &&
4949 qc->tf.feature != SETFEATURES_WC_OFF &&
4950 qc->tf.feature != SETFEATURES_RA_ON &&
4951 qc->tf.feature != SETFEATURES_RA_OFF)
4954 case ATA_CMD_INIT_DEV_PARAMS: /* CHS translation changed */
4955 case ATA_CMD_SET_MULTI: /* multi_count changed */
4956 /* revalidate device */
4957 ehi->dev_action[dev->devno] |= ATA_EH_REVALIDATE;
4958 ata_port_schedule_eh(ap);
4962 dev->flags |= ATA_DFLAG_SLEEPING;
4966 if (unlikely(dev->flags & ATA_DFLAG_DUBIOUS_XFER))
4967 ata_verify_xfer(qc);
4969 __ata_qc_complete(qc);
4971 EXPORT_SYMBOL_GPL(ata_qc_complete);
4974 * ata_qc_get_active - get bitmask of active qcs
4975 * @ap: port in question
4978 * spin_lock_irqsave(host lock)
4981 * Bitmask of active qcs
4983 u64 ata_qc_get_active(struct ata_port *ap)
4985 u64 qc_active = ap->qc_active;
4987 /* ATA_TAG_INTERNAL is sent to hw as tag 0 */
4988 if (qc_active & (1ULL << ATA_TAG_INTERNAL)) {
4989 qc_active |= (1 << 0);
4990 qc_active &= ~(1ULL << ATA_TAG_INTERNAL);
4995 EXPORT_SYMBOL_GPL(ata_qc_get_active);
4998 * ata_qc_issue - issue taskfile to device
4999 * @qc: command to issue to device
5001 * Prepare an ATA command to submission to device.
5002 * This includes mapping the data into a DMA-able
5003 * area, filling in the S/G table, and finally
5004 * writing the taskfile to hardware, starting the command.
5007 * spin_lock_irqsave(host lock)
5009 void ata_qc_issue(struct ata_queued_cmd *qc)
5011 struct ata_port *ap = qc->ap;
5012 struct ata_link *link = qc->dev->link;
5013 u8 prot = qc->tf.protocol;
5015 /* Make sure only one non-NCQ command is outstanding. */
5016 WARN_ON_ONCE(ata_tag_valid(link->active_tag));
5018 if (ata_is_ncq(prot)) {
5019 WARN_ON_ONCE(link->sactive & (1 << qc->hw_tag));
5022 ap->nr_active_links++;
5023 link->sactive |= 1 << qc->hw_tag;
5025 WARN_ON_ONCE(link->sactive);
5027 ap->nr_active_links++;
5028 link->active_tag = qc->tag;
5031 qc->flags |= ATA_QCFLAG_ACTIVE;
5032 ap->qc_active |= 1ULL << qc->tag;
5035 * We guarantee to LLDs that they will have at least one
5036 * non-zero sg if the command is a data command.
5038 if (ata_is_data(prot) && (!qc->sg || !qc->n_elem || !qc->nbytes))
5041 if (ata_is_dma(prot) || (ata_is_pio(prot) &&
5042 (ap->flags & ATA_FLAG_PIO_DMA)))
5043 if (ata_sg_setup(qc))
5046 /* if device is sleeping, schedule reset and abort the link */
5047 if (unlikely(qc->dev->flags & ATA_DFLAG_SLEEPING)) {
5048 link->eh_info.action |= ATA_EH_RESET;
5049 ata_ehi_push_desc(&link->eh_info, "waking up from sleep");
5050 ata_link_abort(link);
5054 trace_ata_qc_prep(qc);
5055 qc->err_mask |= ap->ops->qc_prep(qc);
5056 if (unlikely(qc->err_mask))
5058 trace_ata_qc_issue(qc);
5059 qc->err_mask |= ap->ops->qc_issue(qc);
5060 if (unlikely(qc->err_mask))
5065 qc->err_mask |= AC_ERR_SYSTEM;
5067 ata_qc_complete(qc);
5071 * ata_phys_link_online - test whether the given link is online
5072 * @link: ATA link to test
5074 * Test whether @link is online. Note that this function returns
5075 * 0 if online status of @link cannot be obtained, so
5076 * ata_link_online(link) != !ata_link_offline(link).
5082 * True if the port online status is available and online.
5084 bool ata_phys_link_online(struct ata_link *link)
5088 if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0 &&
5089 ata_sstatus_online(sstatus))
5095 * ata_phys_link_offline - test whether the given link is offline
5096 * @link: ATA link to test
5098 * Test whether @link is offline. Note that this function
5099 * returns 0 if offline status of @link cannot be obtained, so
5100 * ata_link_online(link) != !ata_link_offline(link).
5106 * True if the port offline status is available and offline.
5108 bool ata_phys_link_offline(struct ata_link *link)
5112 if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0 &&
5113 !ata_sstatus_online(sstatus))
5119 * ata_link_online - test whether the given link is online
5120 * @link: ATA link to test
5122 * Test whether @link is online. This is identical to
5123 * ata_phys_link_online() when there's no slave link. When
5124 * there's a slave link, this function should only be called on
5125 * the master link and will return true if any of M/S links is
5132 * True if the port online status is available and online.
5134 bool ata_link_online(struct ata_link *link)
5136 struct ata_link *slave = link->ap->slave_link;
5138 WARN_ON(link == slave); /* shouldn't be called on slave link */
5140 return ata_phys_link_online(link) ||
5141 (slave && ata_phys_link_online(slave));
5143 EXPORT_SYMBOL_GPL(ata_link_online);
5146 * ata_link_offline - test whether the given link is offline
5147 * @link: ATA link to test
5149 * Test whether @link is offline. This is identical to
5150 * ata_phys_link_offline() when there's no slave link. When
5151 * there's a slave link, this function should only be called on
5152 * the master link and will return true if both M/S links are
5159 * True if the port offline status is available and offline.
5161 bool ata_link_offline(struct ata_link *link)
5163 struct ata_link *slave = link->ap->slave_link;
5165 WARN_ON(link == slave); /* shouldn't be called on slave link */
5167 return ata_phys_link_offline(link) &&
5168 (!slave || ata_phys_link_offline(slave));
5170 EXPORT_SYMBOL_GPL(ata_link_offline);
5173 static void ata_port_request_pm(struct ata_port *ap, pm_message_t mesg,
5174 unsigned int action, unsigned int ehi_flags,
5177 struct ata_link *link;
5178 unsigned long flags;
5180 spin_lock_irqsave(ap->lock, flags);
5183 * A previous PM operation might still be in progress. Wait for
5184 * ATA_PFLAG_PM_PENDING to clear.
5186 if (ap->pflags & ATA_PFLAG_PM_PENDING) {
5187 spin_unlock_irqrestore(ap->lock, flags);
5188 ata_port_wait_eh(ap);
5189 spin_lock_irqsave(ap->lock, flags);
5192 /* Request PM operation to EH */
5194 ap->pflags |= ATA_PFLAG_PM_PENDING;
5195 ata_for_each_link(link, ap, HOST_FIRST) {
5196 link->eh_info.action |= action;
5197 link->eh_info.flags |= ehi_flags;
5200 ata_port_schedule_eh(ap);
5202 spin_unlock_irqrestore(ap->lock, flags);
5205 ata_port_wait_eh(ap);
5208 static void ata_port_suspend(struct ata_port *ap, pm_message_t mesg,
5212 * We are about to suspend the port, so we do not care about
5213 * scsi_rescan_device() calls scheduled by previous resume operations.
5214 * The next resume will schedule the rescan again. So cancel any rescan
5215 * that is not done yet.
5217 cancel_delayed_work_sync(&ap->scsi_rescan_task);
5220 * On some hardware, device fails to respond after spun down for
5221 * suspend. As the device will not be used until being resumed, we
5222 * do not need to touch the device. Ask EH to skip the usual stuff
5223 * and proceed directly to suspend.
5225 * http://thread.gmane.org/gmane.linux.ide/46764
5227 ata_port_request_pm(ap, mesg, 0,
5228 ATA_EHI_QUIET | ATA_EHI_NO_AUTOPSY |
5229 ATA_EHI_NO_RECOVERY,
5233 static int ata_port_pm_suspend(struct device *dev)
5235 struct ata_port *ap = to_ata_port(dev);
5237 if (pm_runtime_suspended(dev))
5240 ata_port_suspend(ap, PMSG_SUSPEND, false);
5244 static int ata_port_pm_freeze(struct device *dev)
5246 struct ata_port *ap = to_ata_port(dev);
5248 if (pm_runtime_suspended(dev))
5251 ata_port_suspend(ap, PMSG_FREEZE, false);
5255 static int ata_port_pm_poweroff(struct device *dev)
5257 if (!pm_runtime_suspended(dev))
5258 ata_port_suspend(to_ata_port(dev), PMSG_HIBERNATE, false);
5262 static void ata_port_resume(struct ata_port *ap, pm_message_t mesg,
5265 ata_port_request_pm(ap, mesg, ATA_EH_RESET,
5266 ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET,
5270 static int ata_port_pm_resume(struct device *dev)
5272 if (!pm_runtime_suspended(dev))
5273 ata_port_resume(to_ata_port(dev), PMSG_RESUME, true);
5278 * For ODDs, the upper layer will poll for media change every few seconds,
5279 * which will make it enter and leave suspend state every few seconds. And
5280 * as each suspend will cause a hard/soft reset, the gain of runtime suspend
5281 * is very little and the ODD may malfunction after constantly being reset.
5282 * So the idle callback here will not proceed to suspend if a non-ZPODD capable
5283 * ODD is attached to the port.
5285 static int ata_port_runtime_idle(struct device *dev)
5287 struct ata_port *ap = to_ata_port(dev);
5288 struct ata_link *link;
5289 struct ata_device *adev;
5291 ata_for_each_link(link, ap, HOST_FIRST) {
5292 ata_for_each_dev(adev, link, ENABLED)
5293 if (adev->class == ATA_DEV_ATAPI &&
5294 !zpodd_dev_enabled(adev))
5301 static int ata_port_runtime_suspend(struct device *dev)
5303 ata_port_suspend(to_ata_port(dev), PMSG_AUTO_SUSPEND, false);
5307 static int ata_port_runtime_resume(struct device *dev)
5309 ata_port_resume(to_ata_port(dev), PMSG_AUTO_RESUME, false);
5313 static const struct dev_pm_ops ata_port_pm_ops = {
5314 .suspend = ata_port_pm_suspend,
5315 .resume = ata_port_pm_resume,
5316 .freeze = ata_port_pm_freeze,
5317 .thaw = ata_port_pm_resume,
5318 .poweroff = ata_port_pm_poweroff,
5319 .restore = ata_port_pm_resume,
5321 .runtime_suspend = ata_port_runtime_suspend,
5322 .runtime_resume = ata_port_runtime_resume,
5323 .runtime_idle = ata_port_runtime_idle,
5326 /* sas ports don't participate in pm runtime management of ata_ports,
5327 * and need to resume ata devices at the domain level, not the per-port
5328 * level. sas suspend/resume is async to allow parallel port recovery
5329 * since sas has multiple ata_port instances per Scsi_Host.
5331 void ata_sas_port_suspend(struct ata_port *ap)
5333 ata_port_suspend(ap, PMSG_SUSPEND, true);
5335 EXPORT_SYMBOL_GPL(ata_sas_port_suspend);
5337 void ata_sas_port_resume(struct ata_port *ap)
5339 ata_port_resume(ap, PMSG_RESUME, true);
5341 EXPORT_SYMBOL_GPL(ata_sas_port_resume);
5344 * ata_host_suspend - suspend host
5345 * @host: host to suspend
5348 * Suspend @host. Actual operation is performed by port suspend.
5350 void ata_host_suspend(struct ata_host *host, pm_message_t mesg)
5352 host->dev->power.power_state = mesg;
5354 EXPORT_SYMBOL_GPL(ata_host_suspend);
5357 * ata_host_resume - resume host
5358 * @host: host to resume
5360 * Resume @host. Actual operation is performed by port resume.
5362 void ata_host_resume(struct ata_host *host)
5364 host->dev->power.power_state = PMSG_ON;
5366 EXPORT_SYMBOL_GPL(ata_host_resume);
5369 const struct device_type ata_port_type = {
5370 .name = ATA_PORT_TYPE_NAME,
5372 .pm = &ata_port_pm_ops,
5377 * ata_dev_init - Initialize an ata_device structure
5378 * @dev: Device structure to initialize
5380 * Initialize @dev in preparation for probing.
5383 * Inherited from caller.
5385 void ata_dev_init(struct ata_device *dev)
5387 struct ata_link *link = ata_dev_phys_link(dev);
5388 struct ata_port *ap = link->ap;
5389 unsigned long flags;
5391 /* SATA spd limit is bound to the attached device, reset together */
5392 link->sata_spd_limit = link->hw_sata_spd_limit;
5395 /* High bits of dev->flags are used to record warm plug
5396 * requests which occur asynchronously. Synchronize using
5399 spin_lock_irqsave(ap->lock, flags);
5400 dev->flags &= ~ATA_DFLAG_INIT_MASK;
5402 spin_unlock_irqrestore(ap->lock, flags);
5404 memset((void *)dev + ATA_DEVICE_CLEAR_BEGIN, 0,
5405 ATA_DEVICE_CLEAR_END - ATA_DEVICE_CLEAR_BEGIN);
5406 dev->pio_mask = UINT_MAX;
5407 dev->mwdma_mask = UINT_MAX;
5408 dev->udma_mask = UINT_MAX;
5412 * ata_link_init - Initialize an ata_link structure
5413 * @ap: ATA port link is attached to
5414 * @link: Link structure to initialize
5415 * @pmp: Port multiplier port number
5420 * Kernel thread context (may sleep)
5422 void ata_link_init(struct ata_port *ap, struct ata_link *link, int pmp)
5426 /* clear everything except for devices */
5427 memset((void *)link + ATA_LINK_CLEAR_BEGIN, 0,
5428 ATA_LINK_CLEAR_END - ATA_LINK_CLEAR_BEGIN);
5432 link->active_tag = ATA_TAG_POISON;
5433 link->hw_sata_spd_limit = UINT_MAX;
5435 /* can't use iterator, ap isn't initialized yet */
5436 for (i = 0; i < ATA_MAX_DEVICES; i++) {
5437 struct ata_device *dev = &link->device[i];
5440 dev->devno = dev - link->device;
5441 #ifdef CONFIG_ATA_ACPI
5442 dev->gtf_filter = ata_acpi_gtf_filter;
5449 * sata_link_init_spd - Initialize link->sata_spd_limit
5450 * @link: Link to configure sata_spd_limit for
5452 * Initialize ``link->[hw_]sata_spd_limit`` to the currently
5456 * Kernel thread context (may sleep).
5459 * 0 on success, -errno on failure.
5461 int sata_link_init_spd(struct ata_link *link)
5466 rc = sata_scr_read(link, SCR_CONTROL, &link->saved_scontrol);
5470 spd = (link->saved_scontrol >> 4) & 0xf;
5472 link->hw_sata_spd_limit &= (1 << spd) - 1;
5474 ata_force_link_limits(link);
5476 link->sata_spd_limit = link->hw_sata_spd_limit;
5482 * ata_port_alloc - allocate and initialize basic ATA port resources
5483 * @host: ATA host this allocated port belongs to
5485 * Allocate and initialize basic ATA port resources.
5488 * Allocate ATA port on success, NULL on failure.
5491 * Inherited from calling layer (may sleep).
5493 struct ata_port *ata_port_alloc(struct ata_host *host)
5495 struct ata_port *ap;
5497 ap = kzalloc(sizeof(*ap), GFP_KERNEL);
5501 ap->pflags |= ATA_PFLAG_INITIALIZING | ATA_PFLAG_FROZEN;
5502 ap->lock = &host->lock;
5504 ap->local_port_no = -1;
5506 ap->dev = host->dev;
5508 mutex_init(&ap->scsi_scan_mutex);
5509 INIT_DELAYED_WORK(&ap->hotplug_task, ata_scsi_hotplug);
5510 INIT_DELAYED_WORK(&ap->scsi_rescan_task, ata_scsi_dev_rescan);
5511 INIT_LIST_HEAD(&ap->eh_done_q);
5512 init_waitqueue_head(&ap->eh_wait_q);
5513 init_completion(&ap->park_req_pending);
5514 timer_setup(&ap->fastdrain_timer, ata_eh_fastdrain_timerfn,
5517 ap->cbl = ATA_CBL_NONE;
5519 ata_link_init(ap, &ap->link, 0);
5522 ap->stats.unhandled_irq = 1;
5523 ap->stats.idle_irq = 1;
5525 ata_sff_port_init(ap);
5530 static void ata_devres_release(struct device *gendev, void *res)
5532 struct ata_host *host = dev_get_drvdata(gendev);
5535 for (i = 0; i < host->n_ports; i++) {
5536 struct ata_port *ap = host->ports[i];
5542 scsi_host_put(ap->scsi_host);
5546 dev_set_drvdata(gendev, NULL);
5550 static void ata_host_release(struct kref *kref)
5552 struct ata_host *host = container_of(kref, struct ata_host, kref);
5555 for (i = 0; i < host->n_ports; i++) {
5556 struct ata_port *ap = host->ports[i];
5558 kfree(ap->pmp_link);
5559 kfree(ap->slave_link);
5560 kfree(ap->ncq_sense_buf);
5562 host->ports[i] = NULL;
5567 void ata_host_get(struct ata_host *host)
5569 kref_get(&host->kref);
5572 void ata_host_put(struct ata_host *host)
5574 kref_put(&host->kref, ata_host_release);
5576 EXPORT_SYMBOL_GPL(ata_host_put);
5579 * ata_host_alloc - allocate and init basic ATA host resources
5580 * @dev: generic device this host is associated with
5581 * @max_ports: maximum number of ATA ports associated with this host
5583 * Allocate and initialize basic ATA host resources. LLD calls
5584 * this function to allocate a host, initializes it fully and
5585 * attaches it using ata_host_register().
5587 * @max_ports ports are allocated and host->n_ports is
5588 * initialized to @max_ports. The caller is allowed to decrease
5589 * host->n_ports before calling ata_host_register(). The unused
5590 * ports will be automatically freed on registration.
5593 * Allocate ATA host on success, NULL on failure.
5596 * Inherited from calling layer (may sleep).
5598 struct ata_host *ata_host_alloc(struct device *dev, int max_ports)
5600 struct ata_host *host;
5605 /* alloc a container for our list of ATA ports (buses) */
5606 sz = sizeof(struct ata_host) + (max_ports + 1) * sizeof(void *);
5607 host = kzalloc(sz, GFP_KERNEL);
5611 if (!devres_open_group(dev, NULL, GFP_KERNEL))
5614 dr = devres_alloc(ata_devres_release, 0, GFP_KERNEL);
5618 devres_add(dev, dr);
5619 dev_set_drvdata(dev, host);
5621 spin_lock_init(&host->lock);
5622 mutex_init(&host->eh_mutex);
5624 host->n_ports = max_ports;
5625 kref_init(&host->kref);
5627 /* allocate ports bound to this host */
5628 for (i = 0; i < max_ports; i++) {
5629 struct ata_port *ap;
5631 ap = ata_port_alloc(host);
5636 host->ports[i] = ap;
5639 devres_remove_group(dev, NULL);
5643 devres_release_group(dev, NULL);
5648 EXPORT_SYMBOL_GPL(ata_host_alloc);
5651 * ata_host_alloc_pinfo - alloc host and init with port_info array
5652 * @dev: generic device this host is associated with
5653 * @ppi: array of ATA port_info to initialize host with
5654 * @n_ports: number of ATA ports attached to this host
5656 * Allocate ATA host and initialize with info from @ppi. If NULL
5657 * terminated, @ppi may contain fewer entries than @n_ports. The
5658 * last entry will be used for the remaining ports.
5661 * Allocate ATA host on success, NULL on failure.
5664 * Inherited from calling layer (may sleep).
5666 struct ata_host *ata_host_alloc_pinfo(struct device *dev,
5667 const struct ata_port_info * const * ppi,
5670 const struct ata_port_info *pi = &ata_dummy_port_info;
5671 struct ata_host *host;
5674 host = ata_host_alloc(dev, n_ports);
5678 for (i = 0, j = 0; i < host->n_ports; i++) {
5679 struct ata_port *ap = host->ports[i];
5684 ap->pio_mask = pi->pio_mask;
5685 ap->mwdma_mask = pi->mwdma_mask;
5686 ap->udma_mask = pi->udma_mask;
5687 ap->flags |= pi->flags;
5688 ap->link.flags |= pi->link_flags;
5689 ap->ops = pi->port_ops;
5691 if (!host->ops && (pi->port_ops != &ata_dummy_port_ops))
5692 host->ops = pi->port_ops;
5697 EXPORT_SYMBOL_GPL(ata_host_alloc_pinfo);
5699 static void ata_host_stop(struct device *gendev, void *res)
5701 struct ata_host *host = dev_get_drvdata(gendev);
5704 WARN_ON(!(host->flags & ATA_HOST_STARTED));
5706 for (i = 0; i < host->n_ports; i++) {
5707 struct ata_port *ap = host->ports[i];
5709 if (ap->ops->port_stop)
5710 ap->ops->port_stop(ap);
5713 if (host->ops->host_stop)
5714 host->ops->host_stop(host);
5718 * ata_finalize_port_ops - finalize ata_port_operations
5719 * @ops: ata_port_operations to finalize
5721 * An ata_port_operations can inherit from another ops and that
5722 * ops can again inherit from another. This can go on as many
5723 * times as necessary as long as there is no loop in the
5724 * inheritance chain.
5726 * Ops tables are finalized when the host is started. NULL or
5727 * unspecified entries are inherited from the closet ancestor
5728 * which has the method and the entry is populated with it.
5729 * After finalization, the ops table directly points to all the
5730 * methods and ->inherits is no longer necessary and cleared.
5732 * Using ATA_OP_NULL, inheriting ops can force a method to NULL.
5737 static void ata_finalize_port_ops(struct ata_port_operations *ops)
5739 static DEFINE_SPINLOCK(lock);
5740 const struct ata_port_operations *cur;
5741 void **begin = (void **)ops;
5742 void **end = (void **)&ops->inherits;
5745 if (!ops || !ops->inherits)
5750 for (cur = ops->inherits; cur; cur = cur->inherits) {
5751 void **inherit = (void **)cur;
5753 for (pp = begin; pp < end; pp++, inherit++)
5758 for (pp = begin; pp < end; pp++)
5762 ops->inherits = NULL;
5768 * ata_host_start - start and freeze ports of an ATA host
5769 * @host: ATA host to start ports for
5771 * Start and then freeze ports of @host. Started status is
5772 * recorded in host->flags, so this function can be called
5773 * multiple times. Ports are guaranteed to get started only
5774 * once. If host->ops is not initialized yet, it is set to the
5775 * first non-dummy port ops.
5778 * Inherited from calling layer (may sleep).
5781 * 0 if all ports are started successfully, -errno otherwise.
5783 int ata_host_start(struct ata_host *host)
5786 void *start_dr = NULL;
5789 if (host->flags & ATA_HOST_STARTED)
5792 ata_finalize_port_ops(host->ops);
5794 for (i = 0; i < host->n_ports; i++) {
5795 struct ata_port *ap = host->ports[i];
5797 ata_finalize_port_ops(ap->ops);
5799 if (!host->ops && !ata_port_is_dummy(ap))
5800 host->ops = ap->ops;
5802 if (ap->ops->port_stop)
5806 if (host->ops && host->ops->host_stop)
5810 start_dr = devres_alloc(ata_host_stop, 0, GFP_KERNEL);
5815 for (i = 0; i < host->n_ports; i++) {
5816 struct ata_port *ap = host->ports[i];
5818 if (ap->ops->port_start) {
5819 rc = ap->ops->port_start(ap);
5823 "failed to start port %d (errno=%d)\n",
5828 ata_eh_freeze_port(ap);
5832 devres_add(host->dev, start_dr);
5833 host->flags |= ATA_HOST_STARTED;
5838 struct ata_port *ap = host->ports[i];
5840 if (ap->ops->port_stop)
5841 ap->ops->port_stop(ap);
5843 devres_free(start_dr);
5846 EXPORT_SYMBOL_GPL(ata_host_start);
5849 * ata_host_init - Initialize a host struct for sas (ipr, libsas)
5850 * @host: host to initialize
5851 * @dev: device host is attached to
5855 void ata_host_init(struct ata_host *host, struct device *dev,
5856 struct ata_port_operations *ops)
5858 spin_lock_init(&host->lock);
5859 mutex_init(&host->eh_mutex);
5860 host->n_tags = ATA_MAX_QUEUE;
5863 kref_init(&host->kref);
5865 EXPORT_SYMBOL_GPL(ata_host_init);
5867 void ata_port_probe(struct ata_port *ap)
5869 struct ata_eh_info *ehi = &ap->link.eh_info;
5870 unsigned long flags;
5872 /* kick EH for boot probing */
5873 spin_lock_irqsave(ap->lock, flags);
5875 ehi->probe_mask |= ATA_ALL_DEVICES;
5876 ehi->action |= ATA_EH_RESET;
5877 ehi->flags |= ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET;
5879 ap->pflags &= ~ATA_PFLAG_INITIALIZING;
5880 ap->pflags |= ATA_PFLAG_LOADING;
5881 ata_port_schedule_eh(ap);
5883 spin_unlock_irqrestore(ap->lock, flags);
5885 EXPORT_SYMBOL_GPL(ata_port_probe);
5887 static void async_port_probe(void *data, async_cookie_t cookie)
5889 struct ata_port *ap = data;
5892 * If we're not allowed to scan this host in parallel,
5893 * we need to wait until all previous scans have completed
5894 * before going further.
5895 * Jeff Garzik says this is only within a controller, so we
5896 * don't need to wait for port 0, only for later ports.
5898 if (!(ap->host->flags & ATA_HOST_PARALLEL_SCAN) && ap->port_no != 0)
5899 async_synchronize_cookie(cookie);
5902 ata_port_wait_eh(ap);
5904 /* in order to keep device order, we need to synchronize at this point */
5905 async_synchronize_cookie(cookie);
5907 ata_scsi_scan_host(ap, 1);
5911 * ata_host_register - register initialized ATA host
5912 * @host: ATA host to register
5913 * @sht: template for SCSI host
5915 * Register initialized ATA host. @host is allocated using
5916 * ata_host_alloc() and fully initialized by LLD. This function
5917 * starts ports, registers @host with ATA and SCSI layers and
5918 * probe registered devices.
5921 * Inherited from calling layer (may sleep).
5924 * 0 on success, -errno otherwise.
5926 int ata_host_register(struct ata_host *host, const struct scsi_host_template *sht)
5930 host->n_tags = clamp(sht->can_queue, 1, ATA_MAX_QUEUE);
5932 /* host must have been started */
5933 if (!(host->flags & ATA_HOST_STARTED)) {
5934 dev_err(host->dev, "BUG: trying to register unstarted host\n");
5939 /* Blow away unused ports. This happens when LLD can't
5940 * determine the exact number of ports to allocate at
5943 for (i = host->n_ports; host->ports[i]; i++)
5944 kfree(host->ports[i]);
5946 /* give ports names and add SCSI hosts */
5947 for (i = 0; i < host->n_ports; i++) {
5948 host->ports[i]->print_id = atomic_inc_return(&ata_print_id);
5949 host->ports[i]->local_port_no = i + 1;
5952 /* Create associated sysfs transport objects */
5953 for (i = 0; i < host->n_ports; i++) {
5954 rc = ata_tport_add(host->dev,host->ports[i]);
5960 rc = ata_scsi_add_hosts(host, sht);
5964 /* set cable, sata_spd_limit and report */
5965 for (i = 0; i < host->n_ports; i++) {
5966 struct ata_port *ap = host->ports[i];
5967 unsigned int xfer_mask;
5969 /* set SATA cable type if still unset */
5970 if (ap->cbl == ATA_CBL_NONE && (ap->flags & ATA_FLAG_SATA))
5971 ap->cbl = ATA_CBL_SATA;
5973 /* init sata_spd_limit to the current value */
5974 sata_link_init_spd(&ap->link);
5976 sata_link_init_spd(ap->slave_link);
5978 /* print per-port info to dmesg */
5979 xfer_mask = ata_pack_xfermask(ap->pio_mask, ap->mwdma_mask,
5982 if (!ata_port_is_dummy(ap)) {
5983 ata_port_info(ap, "%cATA max %s %s\n",
5984 (ap->flags & ATA_FLAG_SATA) ? 'S' : 'P',
5985 ata_mode_string(xfer_mask),
5986 ap->link.eh_info.desc);
5987 ata_ehi_clear_desc(&ap->link.eh_info);
5989 ata_port_info(ap, "DUMMY\n");
5992 /* perform each probe asynchronously */
5993 for (i = 0; i < host->n_ports; i++) {
5994 struct ata_port *ap = host->ports[i];
5995 ap->cookie = async_schedule(async_port_probe, ap);
6002 ata_tport_delete(host->ports[i]);
6007 EXPORT_SYMBOL_GPL(ata_host_register);
6010 * ata_host_activate - start host, request IRQ and register it
6011 * @host: target ATA host
6012 * @irq: IRQ to request
6013 * @irq_handler: irq_handler used when requesting IRQ
6014 * @irq_flags: irq_flags used when requesting IRQ
6015 * @sht: scsi_host_template to use when registering the host
6017 * After allocating an ATA host and initializing it, most libata
6018 * LLDs perform three steps to activate the host - start host,
6019 * request IRQ and register it. This helper takes necessary
6020 * arguments and performs the three steps in one go.
6022 * An invalid IRQ skips the IRQ registration and expects the host to
6023 * have set polling mode on the port. In this case, @irq_handler
6027 * Inherited from calling layer (may sleep).
6030 * 0 on success, -errno otherwise.
6032 int ata_host_activate(struct ata_host *host, int irq,
6033 irq_handler_t irq_handler, unsigned long irq_flags,
6034 const struct scsi_host_template *sht)
6039 rc = ata_host_start(host);
6043 /* Special case for polling mode */
6045 WARN_ON(irq_handler);
6046 return ata_host_register(host, sht);
6049 irq_desc = devm_kasprintf(host->dev, GFP_KERNEL, "%s[%s]",
6050 dev_driver_string(host->dev),
6051 dev_name(host->dev));
6055 rc = devm_request_irq(host->dev, irq, irq_handler, irq_flags,
6060 for (i = 0; i < host->n_ports; i++)
6061 ata_port_desc_misc(host->ports[i], irq);
6063 rc = ata_host_register(host, sht);
6064 /* if failed, just free the IRQ and leave ports alone */
6066 devm_free_irq(host->dev, irq, host);
6070 EXPORT_SYMBOL_GPL(ata_host_activate);
6073 * ata_port_detach - Detach ATA port in preparation of device removal
6074 * @ap: ATA port to be detached
6076 * Detach all ATA devices and the associated SCSI devices of @ap;
6077 * then, remove the associated SCSI host. @ap is guaranteed to
6078 * be quiescent on return from this function.
6081 * Kernel thread context (may sleep).
6083 static void ata_port_detach(struct ata_port *ap)
6085 unsigned long flags;
6086 struct ata_link *link;
6087 struct ata_device *dev;
6089 /* Ensure ata_port probe has completed */
6090 async_synchronize_cookie(ap->cookie + 1);
6092 /* Wait for any ongoing EH */
6093 ata_port_wait_eh(ap);
6095 mutex_lock(&ap->scsi_scan_mutex);
6096 spin_lock_irqsave(ap->lock, flags);
6098 /* Remove scsi devices */
6099 ata_for_each_link(link, ap, HOST_FIRST) {
6100 ata_for_each_dev(dev, link, ALL) {
6102 spin_unlock_irqrestore(ap->lock, flags);
6103 scsi_remove_device(dev->sdev);
6104 spin_lock_irqsave(ap->lock, flags);
6110 /* Tell EH to disable all devices */
6111 ap->pflags |= ATA_PFLAG_UNLOADING;
6112 ata_port_schedule_eh(ap);
6114 spin_unlock_irqrestore(ap->lock, flags);
6115 mutex_unlock(&ap->scsi_scan_mutex);
6117 /* wait till EH commits suicide */
6118 ata_port_wait_eh(ap);
6120 /* it better be dead now */
6121 WARN_ON(!(ap->pflags & ATA_PFLAG_UNLOADED));
6123 cancel_delayed_work_sync(&ap->hotplug_task);
6124 cancel_delayed_work_sync(&ap->scsi_rescan_task);
6126 /* clean up zpodd on port removal */
6127 ata_for_each_link(link, ap, HOST_FIRST) {
6128 ata_for_each_dev(dev, link, ALL) {
6129 if (zpodd_dev_enabled(dev))
6135 for (i = 0; i < SATA_PMP_MAX_PORTS; i++)
6136 ata_tlink_delete(&ap->pmp_link[i]);
6138 /* remove the associated SCSI host */
6139 scsi_remove_host(ap->scsi_host);
6140 ata_tport_delete(ap);
6144 * ata_host_detach - Detach all ports of an ATA host
6145 * @host: Host to detach
6147 * Detach all ports of @host.
6150 * Kernel thread context (may sleep).
6152 void ata_host_detach(struct ata_host *host)
6156 for (i = 0; i < host->n_ports; i++)
6157 ata_port_detach(host->ports[i]);
6159 /* the host is dead now, dissociate ACPI */
6160 ata_acpi_dissociate(host);
6162 EXPORT_SYMBOL_GPL(ata_host_detach);
6167 * ata_pci_remove_one - PCI layer callback for device removal
6168 * @pdev: PCI device that was removed
6170 * PCI layer indicates to libata via this hook that hot-unplug or
6171 * module unload event has occurred. Detach all ports. Resource
6172 * release is handled via devres.
6175 * Inherited from PCI layer (may sleep).
6177 void ata_pci_remove_one(struct pci_dev *pdev)
6179 struct ata_host *host = pci_get_drvdata(pdev);
6181 ata_host_detach(host);
6183 EXPORT_SYMBOL_GPL(ata_pci_remove_one);
6185 void ata_pci_shutdown_one(struct pci_dev *pdev)
6187 struct ata_host *host = pci_get_drvdata(pdev);
6190 for (i = 0; i < host->n_ports; i++) {
6191 struct ata_port *ap = host->ports[i];
6193 ap->pflags |= ATA_PFLAG_FROZEN;
6195 /* Disable port interrupts */
6196 if (ap->ops->freeze)
6197 ap->ops->freeze(ap);
6199 /* Stop the port DMA engines */
6200 if (ap->ops->port_stop)
6201 ap->ops->port_stop(ap);
6204 EXPORT_SYMBOL_GPL(ata_pci_shutdown_one);
6206 /* move to PCI subsystem */
6207 int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits)
6209 unsigned long tmp = 0;
6211 switch (bits->width) {
6214 pci_read_config_byte(pdev, bits->reg, &tmp8);
6220 pci_read_config_word(pdev, bits->reg, &tmp16);
6226 pci_read_config_dword(pdev, bits->reg, &tmp32);
6237 return (tmp == bits->val) ? 1 : 0;
6239 EXPORT_SYMBOL_GPL(pci_test_config_bits);
6242 void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg)
6244 pci_save_state(pdev);
6245 pci_disable_device(pdev);
6247 if (mesg.event & PM_EVENT_SLEEP)
6248 pci_set_power_state(pdev, PCI_D3hot);
6250 EXPORT_SYMBOL_GPL(ata_pci_device_do_suspend);
6252 int ata_pci_device_do_resume(struct pci_dev *pdev)
6256 pci_set_power_state(pdev, PCI_D0);
6257 pci_restore_state(pdev);
6259 rc = pcim_enable_device(pdev);
6262 "failed to enable device after resume (%d)\n", rc);
6266 pci_set_master(pdev);
6269 EXPORT_SYMBOL_GPL(ata_pci_device_do_resume);
6271 int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg)
6273 struct ata_host *host = pci_get_drvdata(pdev);
6275 ata_host_suspend(host, mesg);
6277 ata_pci_device_do_suspend(pdev, mesg);
6281 EXPORT_SYMBOL_GPL(ata_pci_device_suspend);
6283 int ata_pci_device_resume(struct pci_dev *pdev)
6285 struct ata_host *host = pci_get_drvdata(pdev);
6288 rc = ata_pci_device_do_resume(pdev);
6290 ata_host_resume(host);
6293 EXPORT_SYMBOL_GPL(ata_pci_device_resume);
6294 #endif /* CONFIG_PM */
6295 #endif /* CONFIG_PCI */
6298 * ata_platform_remove_one - Platform layer callback for device removal
6299 * @pdev: Platform device that was removed
6301 * Platform layer indicates to libata via this hook that hot-unplug or
6302 * module unload event has occurred. Detach all ports. Resource
6303 * release is handled via devres.
6306 * Inherited from platform layer (may sleep).
6308 void ata_platform_remove_one(struct platform_device *pdev)
6310 struct ata_host *host = platform_get_drvdata(pdev);
6312 ata_host_detach(host);
6314 EXPORT_SYMBOL_GPL(ata_platform_remove_one);
6316 #ifdef CONFIG_ATA_FORCE
6318 #define force_cbl(name, flag) \
6319 { #name, .cbl = (flag) }
6321 #define force_spd_limit(spd, val) \
6322 { #spd, .spd_limit = (val) }
6324 #define force_xfer(mode, shift) \
6325 { #mode, .xfer_mask = (1UL << (shift)) }
6327 #define force_lflag_on(name, flags) \
6328 { #name, .lflags_on = (flags) }
6330 #define force_lflag_onoff(name, flags) \
6331 { "no" #name, .lflags_on = (flags) }, \
6332 { #name, .lflags_off = (flags) }
6334 #define force_horkage_on(name, flag) \
6335 { #name, .horkage_on = (flag) }
6337 #define force_horkage_onoff(name, flag) \
6338 { "no" #name, .horkage_on = (flag) }, \
6339 { #name, .horkage_off = (flag) }
6341 static const struct ata_force_param force_tbl[] __initconst = {
6342 force_cbl(40c, ATA_CBL_PATA40),
6343 force_cbl(80c, ATA_CBL_PATA80),
6344 force_cbl(short40c, ATA_CBL_PATA40_SHORT),
6345 force_cbl(unk, ATA_CBL_PATA_UNK),
6346 force_cbl(ign, ATA_CBL_PATA_IGN),
6347 force_cbl(sata, ATA_CBL_SATA),
6349 force_spd_limit(1.5Gbps, 1),
6350 force_spd_limit(3.0Gbps, 2),
6352 force_xfer(pio0, ATA_SHIFT_PIO + 0),
6353 force_xfer(pio1, ATA_SHIFT_PIO + 1),
6354 force_xfer(pio2, ATA_SHIFT_PIO + 2),
6355 force_xfer(pio3, ATA_SHIFT_PIO + 3),
6356 force_xfer(pio4, ATA_SHIFT_PIO + 4),
6357 force_xfer(pio5, ATA_SHIFT_PIO + 5),
6358 force_xfer(pio6, ATA_SHIFT_PIO + 6),
6359 force_xfer(mwdma0, ATA_SHIFT_MWDMA + 0),
6360 force_xfer(mwdma1, ATA_SHIFT_MWDMA + 1),
6361 force_xfer(mwdma2, ATA_SHIFT_MWDMA + 2),
6362 force_xfer(mwdma3, ATA_SHIFT_MWDMA + 3),
6363 force_xfer(mwdma4, ATA_SHIFT_MWDMA + 4),
6364 force_xfer(udma0, ATA_SHIFT_UDMA + 0),
6365 force_xfer(udma16, ATA_SHIFT_UDMA + 0),
6366 force_xfer(udma/16, ATA_SHIFT_UDMA + 0),
6367 force_xfer(udma1, ATA_SHIFT_UDMA + 1),
6368 force_xfer(udma25, ATA_SHIFT_UDMA + 1),
6369 force_xfer(udma/25, ATA_SHIFT_UDMA + 1),
6370 force_xfer(udma2, ATA_SHIFT_UDMA + 2),
6371 force_xfer(udma33, ATA_SHIFT_UDMA + 2),
6372 force_xfer(udma/33, ATA_SHIFT_UDMA + 2),
6373 force_xfer(udma3, ATA_SHIFT_UDMA + 3),
6374 force_xfer(udma44, ATA_SHIFT_UDMA + 3),
6375 force_xfer(udma/44, ATA_SHIFT_UDMA + 3),
6376 force_xfer(udma4, ATA_SHIFT_UDMA + 4),
6377 force_xfer(udma66, ATA_SHIFT_UDMA + 4),
6378 force_xfer(udma/66, ATA_SHIFT_UDMA + 4),
6379 force_xfer(udma5, ATA_SHIFT_UDMA + 5),
6380 force_xfer(udma100, ATA_SHIFT_UDMA + 5),
6381 force_xfer(udma/100, ATA_SHIFT_UDMA + 5),
6382 force_xfer(udma6, ATA_SHIFT_UDMA + 6),
6383 force_xfer(udma133, ATA_SHIFT_UDMA + 6),
6384 force_xfer(udma/133, ATA_SHIFT_UDMA + 6),
6385 force_xfer(udma7, ATA_SHIFT_UDMA + 7),
6387 force_lflag_on(nohrst, ATA_LFLAG_NO_HRST),
6388 force_lflag_on(nosrst, ATA_LFLAG_NO_SRST),
6389 force_lflag_on(norst, ATA_LFLAG_NO_HRST | ATA_LFLAG_NO_SRST),
6390 force_lflag_on(rstonce, ATA_LFLAG_RST_ONCE),
6391 force_lflag_onoff(dbdelay, ATA_LFLAG_NO_DEBOUNCE_DELAY),
6393 force_horkage_onoff(ncq, ATA_HORKAGE_NONCQ),
6394 force_horkage_onoff(ncqtrim, ATA_HORKAGE_NO_NCQ_TRIM),
6395 force_horkage_onoff(ncqati, ATA_HORKAGE_NO_NCQ_ON_ATI),
6397 force_horkage_onoff(trim, ATA_HORKAGE_NOTRIM),
6398 force_horkage_on(trim_zero, ATA_HORKAGE_ZERO_AFTER_TRIM),
6399 force_horkage_on(max_trim_128m, ATA_HORKAGE_MAX_TRIM_128M),
6401 force_horkage_onoff(dma, ATA_HORKAGE_NODMA),
6402 force_horkage_on(atapi_dmadir, ATA_HORKAGE_ATAPI_DMADIR),
6403 force_horkage_on(atapi_mod16_dma, ATA_HORKAGE_ATAPI_MOD16_DMA),
6405 force_horkage_onoff(dmalog, ATA_HORKAGE_NO_DMA_LOG),
6406 force_horkage_onoff(iddevlog, ATA_HORKAGE_NO_ID_DEV_LOG),
6407 force_horkage_onoff(logdir, ATA_HORKAGE_NO_LOG_DIR),
6409 force_horkage_on(max_sec_128, ATA_HORKAGE_MAX_SEC_128),
6410 force_horkage_on(max_sec_1024, ATA_HORKAGE_MAX_SEC_1024),
6411 force_horkage_on(max_sec_lba48, ATA_HORKAGE_MAX_SEC_LBA48),
6413 force_horkage_onoff(lpm, ATA_HORKAGE_NOLPM),
6414 force_horkage_onoff(setxfer, ATA_HORKAGE_NOSETXFER),
6415 force_horkage_on(dump_id, ATA_HORKAGE_DUMP_ID),
6416 force_horkage_onoff(fua, ATA_HORKAGE_NO_FUA),
6418 force_horkage_on(disable, ATA_HORKAGE_DISABLE),
6421 static int __init ata_parse_force_one(char **cur,
6422 struct ata_force_ent *force_ent,
6423 const char **reason)
6425 char *start = *cur, *p = *cur;
6426 char *id, *val, *endp;
6427 const struct ata_force_param *match_fp = NULL;
6428 int nr_matches = 0, i;
6430 /* find where this param ends and update *cur */
6431 while (*p != '\0' && *p != ',')
6442 p = strchr(start, ':');
6444 val = strstrip(start);
6449 id = strstrip(start);
6450 val = strstrip(p + 1);
6453 p = strchr(id, '.');
6456 force_ent->device = simple_strtoul(p, &endp, 10);
6457 if (p == endp || *endp != '\0') {
6458 *reason = "invalid device";
6463 force_ent->port = simple_strtoul(id, &endp, 10);
6464 if (id == endp || *endp != '\0') {
6465 *reason = "invalid port/link";
6470 /* parse val, allow shortcuts so that both 1.5 and 1.5Gbps work */
6471 for (i = 0; i < ARRAY_SIZE(force_tbl); i++) {
6472 const struct ata_force_param *fp = &force_tbl[i];
6474 if (strncasecmp(val, fp->name, strlen(val)))
6480 if (strcasecmp(val, fp->name) == 0) {
6487 *reason = "unknown value";
6490 if (nr_matches > 1) {
6491 *reason = "ambiguous value";
6495 force_ent->param = *match_fp;
6500 static void __init ata_parse_force_param(void)
6502 int idx = 0, size = 1;
6503 int last_port = -1, last_device = -1;
6504 char *p, *cur, *next;
6506 /* Calculate maximum number of params and allocate ata_force_tbl */
6507 for (p = ata_force_param_buf; *p; p++)
6511 ata_force_tbl = kcalloc(size, sizeof(ata_force_tbl[0]), GFP_KERNEL);
6512 if (!ata_force_tbl) {
6513 printk(KERN_WARNING "ata: failed to extend force table, "
6514 "libata.force ignored\n");
6518 /* parse and populate the table */
6519 for (cur = ata_force_param_buf; *cur != '\0'; cur = next) {
6520 const char *reason = "";
6521 struct ata_force_ent te = { .port = -1, .device = -1 };
6524 if (ata_parse_force_one(&next, &te, &reason)) {
6525 printk(KERN_WARNING "ata: failed to parse force "
6526 "parameter \"%s\" (%s)\n",
6531 if (te.port == -1) {
6532 te.port = last_port;
6533 te.device = last_device;
6536 ata_force_tbl[idx++] = te;
6538 last_port = te.port;
6539 last_device = te.device;
6542 ata_force_tbl_size = idx;
6545 static void ata_free_force_param(void)
6547 kfree(ata_force_tbl);
6550 static inline void ata_parse_force_param(void) { }
6551 static inline void ata_free_force_param(void) { }
6554 static int __init ata_init(void)
6558 ata_parse_force_param();
6560 rc = ata_sff_init();
6562 ata_free_force_param();
6566 libata_transport_init();
6567 ata_scsi_transport_template = ata_attach_transport();
6568 if (!ata_scsi_transport_template) {
6574 printk(KERN_DEBUG "libata version " DRV_VERSION " loaded.\n");
6581 static void __exit ata_exit(void)
6583 ata_release_transport(ata_scsi_transport_template);
6584 libata_transport_exit();
6586 ata_free_force_param();
6589 subsys_initcall(ata_init);
6590 module_exit(ata_exit);
6592 static DEFINE_RATELIMIT_STATE(ratelimit, HZ / 5, 1);
6594 int ata_ratelimit(void)
6596 return __ratelimit(&ratelimit);
6598 EXPORT_SYMBOL_GPL(ata_ratelimit);
6601 * ata_msleep - ATA EH owner aware msleep
6602 * @ap: ATA port to attribute the sleep to
6603 * @msecs: duration to sleep in milliseconds
6605 * Sleeps @msecs. If the current task is owner of @ap's EH, the
6606 * ownership is released before going to sleep and reacquired
6607 * after the sleep is complete. IOW, other ports sharing the
6608 * @ap->host will be allowed to own the EH while this task is
6614 void ata_msleep(struct ata_port *ap, unsigned int msecs)
6616 bool owns_eh = ap && ap->host->eh_owner == current;
6622 unsigned long usecs = msecs * USEC_PER_MSEC;
6623 usleep_range(usecs, usecs + 50);
6631 EXPORT_SYMBOL_GPL(ata_msleep);
6634 * ata_wait_register - wait until register value changes
6635 * @ap: ATA port to wait register for, can be NULL
6636 * @reg: IO-mapped register
6637 * @mask: Mask to apply to read register value
6638 * @val: Wait condition
6639 * @interval: polling interval in milliseconds
6640 * @timeout: timeout in milliseconds
6642 * Waiting for some bits of register to change is a common
6643 * operation for ATA controllers. This function reads 32bit LE
6644 * IO-mapped register @reg and tests for the following condition.
6646 * (*@reg & mask) != val
6648 * If the condition is met, it returns; otherwise, the process is
6649 * repeated after @interval_msec until timeout.
6652 * Kernel thread context (may sleep)
6655 * The final register value.
6657 u32 ata_wait_register(struct ata_port *ap, void __iomem *reg, u32 mask, u32 val,
6658 unsigned int interval, unsigned int timeout)
6660 unsigned long deadline;
6663 tmp = ioread32(reg);
6665 /* Calculate timeout _after_ the first read to make sure
6666 * preceding writes reach the controller before starting to
6667 * eat away the timeout.
6669 deadline = ata_deadline(jiffies, timeout);
6671 while ((tmp & mask) == val && time_before(jiffies, deadline)) {
6672 ata_msleep(ap, interval);
6673 tmp = ioread32(reg);
6678 EXPORT_SYMBOL_GPL(ata_wait_register);
6683 static unsigned int ata_dummy_qc_issue(struct ata_queued_cmd *qc)
6685 return AC_ERR_SYSTEM;
6688 static void ata_dummy_error_handler(struct ata_port *ap)
6693 struct ata_port_operations ata_dummy_port_ops = {
6694 .qc_prep = ata_noop_qc_prep,
6695 .qc_issue = ata_dummy_qc_issue,
6696 .error_handler = ata_dummy_error_handler,
6697 .sched_eh = ata_std_sched_eh,
6698 .end_eh = ata_std_end_eh,
6700 EXPORT_SYMBOL_GPL(ata_dummy_port_ops);
6702 const struct ata_port_info ata_dummy_port_info = {
6703 .port_ops = &ata_dummy_port_ops,
6705 EXPORT_SYMBOL_GPL(ata_dummy_port_info);
6707 void ata_print_version(const struct device *dev, const char *version)
6709 dev_printk(KERN_DEBUG, dev, "version %s\n", version);
6711 EXPORT_SYMBOL(ata_print_version);
6713 EXPORT_TRACEPOINT_SYMBOL_GPL(ata_tf_load);
6714 EXPORT_TRACEPOINT_SYMBOL_GPL(ata_exec_command);
6715 EXPORT_TRACEPOINT_SYMBOL_GPL(ata_bmdma_setup);
6716 EXPORT_TRACEPOINT_SYMBOL_GPL(ata_bmdma_start);
6717 EXPORT_TRACEPOINT_SYMBOL_GPL(ata_bmdma_status);