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/async.h>
46 #include <linux/log2.h>
47 #include <linux/slab.h>
48 #include <linux/glob.h>
49 #include <scsi/scsi.h>
50 #include <scsi/scsi_cmnd.h>
51 #include <scsi/scsi_host.h>
52 #include <linux/libata.h>
53 #include <asm/byteorder.h>
54 #include <asm/unaligned.h>
55 #include <linux/cdrom.h>
56 #include <linux/ratelimit.h>
57 #include <linux/leds.h>
58 #include <linux/pm_runtime.h>
59 #include <linux/platform_device.h>
60 #include <asm/setup.h>
62 #define CREATE_TRACE_POINTS
63 #include <trace/events/libata.h>
66 #include "libata-transport.h"
68 const struct ata_port_operations ata_base_port_ops = {
69 .prereset = ata_std_prereset,
70 .postreset = ata_std_postreset,
71 .error_handler = ata_std_error_handler,
72 .sched_eh = ata_std_sched_eh,
73 .end_eh = ata_std_end_eh,
76 const struct ata_port_operations sata_port_ops = {
77 .inherits = &ata_base_port_ops,
79 .qc_defer = ata_std_qc_defer,
80 .hardreset = sata_std_hardreset,
82 EXPORT_SYMBOL_GPL(sata_port_ops);
84 static unsigned int ata_dev_init_params(struct ata_device *dev,
85 u16 heads, u16 sectors);
86 static unsigned int ata_dev_set_xfermode(struct ata_device *dev);
87 static void ata_dev_xfermask(struct ata_device *dev);
88 static unsigned long ata_dev_blacklisted(const struct ata_device *dev);
90 atomic_t ata_print_id = ATOMIC_INIT(0);
92 #ifdef CONFIG_ATA_FORCE
93 struct ata_force_param {
97 unsigned long xfer_mask;
98 unsigned int horkage_on;
99 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);
164 static bool ata_sstatus_online(u32 sstatus)
166 return (sstatus & 0xf) == 0x3;
170 * ata_link_next - link iteration helper
171 * @link: the previous link, NULL to start
172 * @ap: ATA port containing links to iterate
173 * @mode: iteration mode, one of ATA_LITER_*
176 * Host lock or EH context.
179 * Pointer to the next link.
181 struct ata_link *ata_link_next(struct ata_link *link, struct ata_port *ap,
182 enum ata_link_iter_mode mode)
184 BUG_ON(mode != ATA_LITER_EDGE &&
185 mode != ATA_LITER_PMP_FIRST && mode != ATA_LITER_HOST_FIRST);
187 /* NULL link indicates start of iteration */
191 case ATA_LITER_PMP_FIRST:
192 if (sata_pmp_attached(ap))
195 case ATA_LITER_HOST_FIRST:
199 /* we just iterated over the host link, what's next? */
200 if (link == &ap->link)
202 case ATA_LITER_HOST_FIRST:
203 if (sata_pmp_attached(ap))
206 case ATA_LITER_PMP_FIRST:
207 if (unlikely(ap->slave_link))
208 return ap->slave_link;
214 /* slave_link excludes PMP */
215 if (unlikely(link == ap->slave_link))
218 /* we were over a PMP link */
219 if (++link < ap->pmp_link + ap->nr_pmp_links)
222 if (mode == ATA_LITER_PMP_FIRST)
227 EXPORT_SYMBOL_GPL(ata_link_next);
230 * ata_dev_next - device iteration helper
231 * @dev: the previous device, NULL to start
232 * @link: ATA link containing devices to iterate
233 * @mode: iteration mode, one of ATA_DITER_*
236 * Host lock or EH context.
239 * Pointer to the next device.
241 struct ata_device *ata_dev_next(struct ata_device *dev, struct ata_link *link,
242 enum ata_dev_iter_mode mode)
244 BUG_ON(mode != ATA_DITER_ENABLED && mode != ATA_DITER_ENABLED_REVERSE &&
245 mode != ATA_DITER_ALL && mode != ATA_DITER_ALL_REVERSE);
247 /* NULL dev indicates start of iteration */
250 case ATA_DITER_ENABLED:
254 case ATA_DITER_ENABLED_REVERSE:
255 case ATA_DITER_ALL_REVERSE:
256 dev = link->device + ata_link_max_devices(link) - 1;
261 /* move to the next one */
263 case ATA_DITER_ENABLED:
265 if (++dev < link->device + ata_link_max_devices(link))
268 case ATA_DITER_ENABLED_REVERSE:
269 case ATA_DITER_ALL_REVERSE:
270 if (--dev >= link->device)
276 if ((mode == ATA_DITER_ENABLED || mode == ATA_DITER_ENABLED_REVERSE) &&
277 !ata_dev_enabled(dev))
281 EXPORT_SYMBOL_GPL(ata_dev_next);
284 * ata_dev_phys_link - find physical link for a device
285 * @dev: ATA device to look up physical link for
287 * Look up physical link which @dev is attached to. Note that
288 * this is different from @dev->link only when @dev is on slave
289 * link. For all other cases, it's the same as @dev->link.
295 * Pointer to the found physical link.
297 struct ata_link *ata_dev_phys_link(struct ata_device *dev)
299 struct ata_port *ap = dev->link->ap;
305 return ap->slave_link;
308 #ifdef CONFIG_ATA_FORCE
310 * ata_force_cbl - force cable type according to libata.force
311 * @ap: ATA port of interest
313 * Force cable type according to libata.force and whine about it.
314 * The last entry which has matching port number is used, so it
315 * can be specified as part of device force parameters. For
316 * example, both "a:40c,1.00:udma4" and "1.00:40c,udma4" have the
322 void ata_force_cbl(struct ata_port *ap)
326 for (i = ata_force_tbl_size - 1; i >= 0; i--) {
327 const struct ata_force_ent *fe = &ata_force_tbl[i];
329 if (fe->port != -1 && fe->port != ap->print_id)
332 if (fe->param.cbl == ATA_CBL_NONE)
335 ap->cbl = fe->param.cbl;
336 ata_port_notice(ap, "FORCE: cable set to %s\n", fe->param.name);
342 * ata_force_link_limits - force link limits according to libata.force
343 * @link: ATA link of interest
345 * Force link flags and SATA spd limit according to libata.force
346 * and whine about it. When only the port part is specified
347 * (e.g. 1:), the limit applies to all links connected to both
348 * the host link and all fan-out ports connected via PMP. If the
349 * device part is specified as 0 (e.g. 1.00:), it specifies the
350 * first fan-out link not the host link. Device number 15 always
351 * points to the host link whether PMP is attached or not. If the
352 * controller has slave link, device number 16 points to it.
357 static void ata_force_link_limits(struct ata_link *link)
359 bool did_spd = false;
360 int linkno = link->pmp;
363 if (ata_is_host_link(link))
366 for (i = ata_force_tbl_size - 1; i >= 0; i--) {
367 const struct ata_force_ent *fe = &ata_force_tbl[i];
369 if (fe->port != -1 && fe->port != link->ap->print_id)
372 if (fe->device != -1 && fe->device != linkno)
375 /* only honor the first spd limit */
376 if (!did_spd && fe->param.spd_limit) {
377 link->hw_sata_spd_limit = (1 << fe->param.spd_limit) - 1;
378 ata_link_notice(link, "FORCE: PHY spd limit set to %s\n",
383 /* let lflags stack */
384 if (fe->param.lflags) {
385 link->flags |= fe->param.lflags;
386 ata_link_notice(link,
387 "FORCE: link flag 0x%x forced -> 0x%x\n",
388 fe->param.lflags, link->flags);
394 * ata_force_xfermask - force xfermask according to libata.force
395 * @dev: ATA device of interest
397 * Force xfer_mask according to libata.force and whine about it.
398 * For consistency with link selection, device number 15 selects
399 * the first device connected to the host link.
404 static void ata_force_xfermask(struct ata_device *dev)
406 int devno = dev->link->pmp + dev->devno;
407 int alt_devno = devno;
410 /* allow n.15/16 for devices attached to host port */
411 if (ata_is_host_link(dev->link))
414 for (i = ata_force_tbl_size - 1; i >= 0; i--) {
415 const struct ata_force_ent *fe = &ata_force_tbl[i];
416 unsigned long pio_mask, mwdma_mask, udma_mask;
418 if (fe->port != -1 && fe->port != dev->link->ap->print_id)
421 if (fe->device != -1 && fe->device != devno &&
422 fe->device != alt_devno)
425 if (!fe->param.xfer_mask)
428 ata_unpack_xfermask(fe->param.xfer_mask,
429 &pio_mask, &mwdma_mask, &udma_mask);
431 dev->udma_mask = udma_mask;
432 else if (mwdma_mask) {
434 dev->mwdma_mask = mwdma_mask;
438 dev->pio_mask = pio_mask;
441 ata_dev_notice(dev, "FORCE: xfer_mask set to %s\n",
448 * ata_force_horkage - force horkage according to libata.force
449 * @dev: ATA device of interest
451 * Force horkage according to libata.force and whine about it.
452 * For consistency with link selection, device number 15 selects
453 * the first device connected to the host link.
458 static void ata_force_horkage(struct ata_device *dev)
460 int devno = dev->link->pmp + dev->devno;
461 int alt_devno = devno;
464 /* allow n.15/16 for devices attached to host port */
465 if (ata_is_host_link(dev->link))
468 for (i = 0; i < ata_force_tbl_size; i++) {
469 const struct ata_force_ent *fe = &ata_force_tbl[i];
471 if (fe->port != -1 && fe->port != dev->link->ap->print_id)
474 if (fe->device != -1 && fe->device != devno &&
475 fe->device != alt_devno)
478 if (!(~dev->horkage & fe->param.horkage_on) &&
479 !(dev->horkage & fe->param.horkage_off))
482 dev->horkage |= fe->param.horkage_on;
483 dev->horkage &= ~fe->param.horkage_off;
485 ata_dev_notice(dev, "FORCE: horkage modified (%s)\n",
490 static inline void ata_force_link_limits(struct ata_link *link) { }
491 static inline void ata_force_xfermask(struct ata_device *dev) { }
492 static inline void ata_force_horkage(struct ata_device *dev) { }
496 * atapi_cmd_type - Determine ATAPI command type from SCSI opcode
497 * @opcode: SCSI opcode
499 * Determine ATAPI command type from @opcode.
505 * ATAPI_{READ|WRITE|READ_CD|PASS_THRU|MISC}
507 int atapi_cmd_type(u8 opcode)
516 case GPCMD_WRITE_AND_VERIFY_10:
520 case GPCMD_READ_CD_MSF:
521 return ATAPI_READ_CD;
525 if (atapi_passthru16)
526 return ATAPI_PASS_THRU;
532 EXPORT_SYMBOL_GPL(atapi_cmd_type);
534 static const u8 ata_rw_cmds[] = {
538 ATA_CMD_READ_MULTI_EXT,
539 ATA_CMD_WRITE_MULTI_EXT,
543 ATA_CMD_WRITE_MULTI_FUA_EXT,
547 ATA_CMD_PIO_READ_EXT,
548 ATA_CMD_PIO_WRITE_EXT,
561 ATA_CMD_WRITE_FUA_EXT
565 * ata_rwcmd_protocol - set taskfile r/w commands and protocol
566 * @tf: command to examine and configure
567 * @dev: device tf belongs to
569 * Examine the device configuration and tf->flags to calculate
570 * the proper read/write commands and protocol to use.
575 static int ata_rwcmd_protocol(struct ata_taskfile *tf, struct ata_device *dev)
579 int index, fua, lba48, write;
581 fua = (tf->flags & ATA_TFLAG_FUA) ? 4 : 0;
582 lba48 = (tf->flags & ATA_TFLAG_LBA48) ? 2 : 0;
583 write = (tf->flags & ATA_TFLAG_WRITE) ? 1 : 0;
585 if (dev->flags & ATA_DFLAG_PIO) {
586 tf->protocol = ATA_PROT_PIO;
587 index = dev->multi_count ? 0 : 8;
588 } else if (lba48 && (dev->link->ap->flags & ATA_FLAG_PIO_LBA48)) {
589 /* Unable to use DMA due to host limitation */
590 tf->protocol = ATA_PROT_PIO;
591 index = dev->multi_count ? 0 : 8;
593 tf->protocol = ATA_PROT_DMA;
597 cmd = ata_rw_cmds[index + fua + lba48 + write];
606 * ata_tf_read_block - Read block address from ATA taskfile
607 * @tf: ATA taskfile of interest
608 * @dev: ATA device @tf belongs to
613 * Read block address from @tf. This function can handle all
614 * three address formats - LBA, LBA48 and CHS. tf->protocol and
615 * flags select the address format to use.
618 * Block address read from @tf.
620 u64 ata_tf_read_block(const struct ata_taskfile *tf, struct ata_device *dev)
624 if (tf->flags & ATA_TFLAG_LBA) {
625 if (tf->flags & ATA_TFLAG_LBA48) {
626 block |= (u64)tf->hob_lbah << 40;
627 block |= (u64)tf->hob_lbam << 32;
628 block |= (u64)tf->hob_lbal << 24;
630 block |= (tf->device & 0xf) << 24;
632 block |= tf->lbah << 16;
633 block |= tf->lbam << 8;
638 cyl = tf->lbam | (tf->lbah << 8);
639 head = tf->device & 0xf;
644 "device reported invalid CHS sector 0\n");
648 block = (cyl * dev->heads + head) * dev->sectors + sect - 1;
655 * ata_build_rw_tf - Build ATA taskfile for given read/write request
656 * @tf: Target ATA taskfile
657 * @dev: ATA device @tf belongs to
658 * @block: Block address
659 * @n_block: Number of blocks
660 * @tf_flags: RW/FUA etc...
662 * @class: IO priority class
667 * Build ATA taskfile @tf for read/write request described by
668 * @block, @n_block, @tf_flags and @tag on @dev.
672 * 0 on success, -ERANGE if the request is too large for @dev,
673 * -EINVAL if the request is invalid.
675 int ata_build_rw_tf(struct ata_taskfile *tf, struct ata_device *dev,
676 u64 block, u32 n_block, unsigned int tf_flags,
677 unsigned int tag, int class)
679 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
680 tf->flags |= tf_flags;
682 if (ata_ncq_enabled(dev) && !ata_tag_internal(tag)) {
684 if (!lba_48_ok(block, n_block))
687 tf->protocol = ATA_PROT_NCQ;
688 tf->flags |= ATA_TFLAG_LBA | ATA_TFLAG_LBA48;
690 if (tf->flags & ATA_TFLAG_WRITE)
691 tf->command = ATA_CMD_FPDMA_WRITE;
693 tf->command = ATA_CMD_FPDMA_READ;
695 tf->nsect = tag << 3;
696 tf->hob_feature = (n_block >> 8) & 0xff;
697 tf->feature = n_block & 0xff;
699 tf->hob_lbah = (block >> 40) & 0xff;
700 tf->hob_lbam = (block >> 32) & 0xff;
701 tf->hob_lbal = (block >> 24) & 0xff;
702 tf->lbah = (block >> 16) & 0xff;
703 tf->lbam = (block >> 8) & 0xff;
704 tf->lbal = block & 0xff;
706 tf->device = ATA_LBA;
707 if (tf->flags & ATA_TFLAG_FUA)
708 tf->device |= 1 << 7;
710 if (dev->flags & ATA_DFLAG_NCQ_PRIO) {
711 if (class == IOPRIO_CLASS_RT)
712 tf->hob_nsect |= ATA_PRIO_HIGH <<
715 } else if (dev->flags & ATA_DFLAG_LBA) {
716 tf->flags |= ATA_TFLAG_LBA;
718 if (lba_28_ok(block, n_block)) {
720 tf->device |= (block >> 24) & 0xf;
721 } else if (lba_48_ok(block, n_block)) {
722 if (!(dev->flags & ATA_DFLAG_LBA48))
726 tf->flags |= ATA_TFLAG_LBA48;
728 tf->hob_nsect = (n_block >> 8) & 0xff;
730 tf->hob_lbah = (block >> 40) & 0xff;
731 tf->hob_lbam = (block >> 32) & 0xff;
732 tf->hob_lbal = (block >> 24) & 0xff;
734 /* request too large even for LBA48 */
737 if (unlikely(ata_rwcmd_protocol(tf, dev) < 0))
740 tf->nsect = n_block & 0xff;
742 tf->lbah = (block >> 16) & 0xff;
743 tf->lbam = (block >> 8) & 0xff;
744 tf->lbal = block & 0xff;
746 tf->device |= ATA_LBA;
749 u32 sect, head, cyl, track;
751 /* The request -may- be too large for CHS addressing. */
752 if (!lba_28_ok(block, n_block))
755 if (unlikely(ata_rwcmd_protocol(tf, dev) < 0))
758 /* Convert LBA to CHS */
759 track = (u32)block / dev->sectors;
760 cyl = track / dev->heads;
761 head = track % dev->heads;
762 sect = (u32)block % dev->sectors + 1;
764 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
765 (u32)block, track, cyl, head, sect);
767 /* Check whether the converted CHS can fit.
771 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
774 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
785 * ata_pack_xfermask - Pack pio, mwdma and udma masks into xfer_mask
786 * @pio_mask: pio_mask
787 * @mwdma_mask: mwdma_mask
788 * @udma_mask: udma_mask
790 * Pack @pio_mask, @mwdma_mask and @udma_mask into a single
791 * unsigned int xfer_mask.
799 unsigned long ata_pack_xfermask(unsigned long pio_mask,
800 unsigned long mwdma_mask,
801 unsigned long udma_mask)
803 return ((pio_mask << ATA_SHIFT_PIO) & ATA_MASK_PIO) |
804 ((mwdma_mask << ATA_SHIFT_MWDMA) & ATA_MASK_MWDMA) |
805 ((udma_mask << ATA_SHIFT_UDMA) & ATA_MASK_UDMA);
807 EXPORT_SYMBOL_GPL(ata_pack_xfermask);
810 * ata_unpack_xfermask - Unpack xfer_mask into pio, mwdma and udma masks
811 * @xfer_mask: xfer_mask to unpack
812 * @pio_mask: resulting pio_mask
813 * @mwdma_mask: resulting mwdma_mask
814 * @udma_mask: resulting udma_mask
816 * Unpack @xfer_mask into @pio_mask, @mwdma_mask and @udma_mask.
817 * Any NULL destination masks will be ignored.
819 void ata_unpack_xfermask(unsigned long xfer_mask, unsigned long *pio_mask,
820 unsigned long *mwdma_mask, unsigned long *udma_mask)
823 *pio_mask = (xfer_mask & ATA_MASK_PIO) >> ATA_SHIFT_PIO;
825 *mwdma_mask = (xfer_mask & ATA_MASK_MWDMA) >> ATA_SHIFT_MWDMA;
827 *udma_mask = (xfer_mask & ATA_MASK_UDMA) >> ATA_SHIFT_UDMA;
830 static const struct ata_xfer_ent {
834 { ATA_SHIFT_PIO, ATA_NR_PIO_MODES, XFER_PIO_0 },
835 { ATA_SHIFT_MWDMA, ATA_NR_MWDMA_MODES, XFER_MW_DMA_0 },
836 { ATA_SHIFT_UDMA, ATA_NR_UDMA_MODES, XFER_UDMA_0 },
841 * ata_xfer_mask2mode - Find matching XFER_* for the given xfer_mask
842 * @xfer_mask: xfer_mask of interest
844 * Return matching XFER_* value for @xfer_mask. Only the highest
845 * bit of @xfer_mask is considered.
851 * Matching XFER_* value, 0xff if no match found.
853 u8 ata_xfer_mask2mode(unsigned long xfer_mask)
855 int highbit = fls(xfer_mask) - 1;
856 const struct ata_xfer_ent *ent;
858 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
859 if (highbit >= ent->shift && highbit < ent->shift + ent->bits)
860 return ent->base + highbit - ent->shift;
863 EXPORT_SYMBOL_GPL(ata_xfer_mask2mode);
866 * ata_xfer_mode2mask - Find matching xfer_mask for XFER_*
867 * @xfer_mode: XFER_* of interest
869 * Return matching xfer_mask for @xfer_mode.
875 * Matching xfer_mask, 0 if no match found.
877 unsigned long ata_xfer_mode2mask(u8 xfer_mode)
879 const struct ata_xfer_ent *ent;
881 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
882 if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits)
883 return ((2 << (ent->shift + xfer_mode - ent->base)) - 1)
884 & ~((1 << ent->shift) - 1);
887 EXPORT_SYMBOL_GPL(ata_xfer_mode2mask);
890 * ata_xfer_mode2shift - Find matching xfer_shift for XFER_*
891 * @xfer_mode: XFER_* of interest
893 * Return matching xfer_shift for @xfer_mode.
899 * Matching xfer_shift, -1 if no match found.
901 int ata_xfer_mode2shift(unsigned long xfer_mode)
903 const struct ata_xfer_ent *ent;
905 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
906 if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits)
910 EXPORT_SYMBOL_GPL(ata_xfer_mode2shift);
913 * ata_mode_string - convert xfer_mask to string
914 * @xfer_mask: mask of bits supported; only highest bit counts.
916 * Determine string which represents the highest speed
917 * (highest bit in @modemask).
923 * Constant C string representing highest speed listed in
924 * @mode_mask, or the constant C string "<n/a>".
926 const char *ata_mode_string(unsigned long xfer_mask)
928 static const char * const xfer_mode_str[] = {
952 highbit = fls(xfer_mask) - 1;
953 if (highbit >= 0 && highbit < ARRAY_SIZE(xfer_mode_str))
954 return xfer_mode_str[highbit];
957 EXPORT_SYMBOL_GPL(ata_mode_string);
959 const char *sata_spd_string(unsigned int spd)
961 static const char * const spd_str[] = {
967 if (spd == 0 || (spd - 1) >= ARRAY_SIZE(spd_str))
969 return spd_str[spd - 1];
973 * ata_dev_classify - determine device type based on ATA-spec signature
974 * @tf: ATA taskfile register set for device to be identified
976 * Determine from taskfile register contents whether a device is
977 * ATA or ATAPI, as per "Signature and persistence" section
978 * of ATA/PI spec (volume 1, sect 5.14).
984 * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, %ATA_DEV_PMP,
985 * %ATA_DEV_ZAC, or %ATA_DEV_UNKNOWN the event of failure.
987 unsigned int ata_dev_classify(const struct ata_taskfile *tf)
989 /* Apple's open source Darwin code hints that some devices only
990 * put a proper signature into the LBA mid/high registers,
991 * So, we only check those. It's sufficient for uniqueness.
993 * ATA/ATAPI-7 (d1532v1r1: Feb. 19, 2003) specified separate
994 * signatures for ATA and ATAPI devices attached on SerialATA,
995 * 0x3c/0xc3 and 0x69/0x96 respectively. However, SerialATA
996 * spec has never mentioned about using different signatures
997 * for ATA/ATAPI devices. Then, Serial ATA II: Port
998 * Multiplier specification began to use 0x69/0x96 to identify
999 * port multpliers and 0x3c/0xc3 to identify SEMB device.
1000 * ATA/ATAPI-7 dropped descriptions about 0x3c/0xc3 and
1001 * 0x69/0x96 shortly and described them as reserved for
1004 * We follow the current spec and consider that 0x69/0x96
1005 * identifies a port multiplier and 0x3c/0xc3 a SEMB device.
1006 * Unfortunately, WDC WD1600JS-62MHB5 (a hard drive) reports
1007 * SEMB signature. This is worked around in
1008 * ata_dev_read_id().
1010 if ((tf->lbam == 0) && (tf->lbah == 0)) {
1011 DPRINTK("found ATA device by sig\n");
1015 if ((tf->lbam == 0x14) && (tf->lbah == 0xeb)) {
1016 DPRINTK("found ATAPI device by sig\n");
1017 return ATA_DEV_ATAPI;
1020 if ((tf->lbam == 0x69) && (tf->lbah == 0x96)) {
1021 DPRINTK("found PMP device by sig\n");
1025 if ((tf->lbam == 0x3c) && (tf->lbah == 0xc3)) {
1026 DPRINTK("found SEMB device by sig (could be ATA device)\n");
1027 return ATA_DEV_SEMB;
1030 if ((tf->lbam == 0xcd) && (tf->lbah == 0xab)) {
1031 DPRINTK("found ZAC device by sig\n");
1035 DPRINTK("unknown device\n");
1036 return ATA_DEV_UNKNOWN;
1038 EXPORT_SYMBOL_GPL(ata_dev_classify);
1041 * ata_id_string - Convert IDENTIFY DEVICE page into string
1042 * @id: IDENTIFY DEVICE results we will examine
1043 * @s: string into which data is output
1044 * @ofs: offset into identify device page
1045 * @len: length of string to return. must be an even number.
1047 * The strings in the IDENTIFY DEVICE page are broken up into
1048 * 16-bit chunks. Run through the string, and output each
1049 * 8-bit chunk linearly, regardless of platform.
1055 void ata_id_string(const u16 *id, unsigned char *s,
1056 unsigned int ofs, unsigned int len)
1075 EXPORT_SYMBOL_GPL(ata_id_string);
1078 * ata_id_c_string - Convert IDENTIFY DEVICE page into C string
1079 * @id: IDENTIFY DEVICE results we will examine
1080 * @s: string into which data is output
1081 * @ofs: offset into identify device page
1082 * @len: length of string to return. must be an odd number.
1084 * This function is identical to ata_id_string except that it
1085 * trims trailing spaces and terminates the resulting string with
1086 * null. @len must be actual maximum length (even number) + 1.
1091 void ata_id_c_string(const u16 *id, unsigned char *s,
1092 unsigned int ofs, unsigned int len)
1096 ata_id_string(id, s, ofs, len - 1);
1098 p = s + strnlen(s, len - 1);
1099 while (p > s && p[-1] == ' ')
1103 EXPORT_SYMBOL_GPL(ata_id_c_string);
1105 static u64 ata_id_n_sectors(const u16 *id)
1107 if (ata_id_has_lba(id)) {
1108 if (ata_id_has_lba48(id))
1109 return ata_id_u64(id, ATA_ID_LBA_CAPACITY_2);
1111 return ata_id_u32(id, ATA_ID_LBA_CAPACITY);
1113 if (ata_id_current_chs_valid(id))
1114 return id[ATA_ID_CUR_CYLS] * id[ATA_ID_CUR_HEADS] *
1115 id[ATA_ID_CUR_SECTORS];
1117 return id[ATA_ID_CYLS] * id[ATA_ID_HEADS] *
1122 u64 ata_tf_to_lba48(const struct ata_taskfile *tf)
1126 sectors |= ((u64)(tf->hob_lbah & 0xff)) << 40;
1127 sectors |= ((u64)(tf->hob_lbam & 0xff)) << 32;
1128 sectors |= ((u64)(tf->hob_lbal & 0xff)) << 24;
1129 sectors |= (tf->lbah & 0xff) << 16;
1130 sectors |= (tf->lbam & 0xff) << 8;
1131 sectors |= (tf->lbal & 0xff);
1136 u64 ata_tf_to_lba(const struct ata_taskfile *tf)
1140 sectors |= (tf->device & 0x0f) << 24;
1141 sectors |= (tf->lbah & 0xff) << 16;
1142 sectors |= (tf->lbam & 0xff) << 8;
1143 sectors |= (tf->lbal & 0xff);
1149 * ata_read_native_max_address - Read native max address
1150 * @dev: target device
1151 * @max_sectors: out parameter for the result native max address
1153 * Perform an LBA48 or LBA28 native size query upon the device in
1157 * 0 on success, -EACCES if command is aborted by the drive.
1158 * -EIO on other errors.
1160 static int ata_read_native_max_address(struct ata_device *dev, u64 *max_sectors)
1162 unsigned int err_mask;
1163 struct ata_taskfile tf;
1164 int lba48 = ata_id_has_lba48(dev->id);
1166 ata_tf_init(dev, &tf);
1168 /* always clear all address registers */
1169 tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
1172 tf.command = ATA_CMD_READ_NATIVE_MAX_EXT;
1173 tf.flags |= ATA_TFLAG_LBA48;
1175 tf.command = ATA_CMD_READ_NATIVE_MAX;
1177 tf.protocol = ATA_PROT_NODATA;
1178 tf.device |= ATA_LBA;
1180 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
1183 "failed to read native max address (err_mask=0x%x)\n",
1185 if (err_mask == AC_ERR_DEV && (tf.feature & ATA_ABORTED))
1191 *max_sectors = ata_tf_to_lba48(&tf) + 1;
1193 *max_sectors = ata_tf_to_lba(&tf) + 1;
1194 if (dev->horkage & ATA_HORKAGE_HPA_SIZE)
1200 * ata_set_max_sectors - Set max sectors
1201 * @dev: target device
1202 * @new_sectors: new max sectors value to set for the device
1204 * Set max sectors of @dev to @new_sectors.
1207 * 0 on success, -EACCES if command is aborted or denied (due to
1208 * previous non-volatile SET_MAX) by the drive. -EIO on other
1211 static int ata_set_max_sectors(struct ata_device *dev, u64 new_sectors)
1213 unsigned int err_mask;
1214 struct ata_taskfile tf;
1215 int lba48 = ata_id_has_lba48(dev->id);
1219 ata_tf_init(dev, &tf);
1221 tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
1224 tf.command = ATA_CMD_SET_MAX_EXT;
1225 tf.flags |= ATA_TFLAG_LBA48;
1227 tf.hob_lbal = (new_sectors >> 24) & 0xff;
1228 tf.hob_lbam = (new_sectors >> 32) & 0xff;
1229 tf.hob_lbah = (new_sectors >> 40) & 0xff;
1231 tf.command = ATA_CMD_SET_MAX;
1233 tf.device |= (new_sectors >> 24) & 0xf;
1236 tf.protocol = ATA_PROT_NODATA;
1237 tf.device |= ATA_LBA;
1239 tf.lbal = (new_sectors >> 0) & 0xff;
1240 tf.lbam = (new_sectors >> 8) & 0xff;
1241 tf.lbah = (new_sectors >> 16) & 0xff;
1243 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
1246 "failed to set max address (err_mask=0x%x)\n",
1248 if (err_mask == AC_ERR_DEV &&
1249 (tf.feature & (ATA_ABORTED | ATA_IDNF)))
1258 * ata_hpa_resize - Resize a device with an HPA set
1259 * @dev: Device to resize
1261 * Read the size of an LBA28 or LBA48 disk with HPA features and resize
1262 * it if required to the full size of the media. The caller must check
1263 * the drive has the HPA feature set enabled.
1266 * 0 on success, -errno on failure.
1268 static int ata_hpa_resize(struct ata_device *dev)
1270 struct ata_eh_context *ehc = &dev->link->eh_context;
1271 int print_info = ehc->i.flags & ATA_EHI_PRINTINFO;
1272 bool unlock_hpa = ata_ignore_hpa || dev->flags & ATA_DFLAG_UNLOCK_HPA;
1273 u64 sectors = ata_id_n_sectors(dev->id);
1277 /* do we need to do it? */
1278 if ((dev->class != ATA_DEV_ATA && dev->class != ATA_DEV_ZAC) ||
1279 !ata_id_has_lba(dev->id) || !ata_id_hpa_enabled(dev->id) ||
1280 (dev->horkage & ATA_HORKAGE_BROKEN_HPA))
1283 /* read native max address */
1284 rc = ata_read_native_max_address(dev, &native_sectors);
1286 /* If device aborted the command or HPA isn't going to
1287 * be unlocked, skip HPA resizing.
1289 if (rc == -EACCES || !unlock_hpa) {
1291 "HPA support seems broken, skipping HPA handling\n");
1292 dev->horkage |= ATA_HORKAGE_BROKEN_HPA;
1294 /* we can continue if device aborted the command */
1301 dev->n_native_sectors = native_sectors;
1303 /* nothing to do? */
1304 if (native_sectors <= sectors || !unlock_hpa) {
1305 if (!print_info || native_sectors == sectors)
1308 if (native_sectors > sectors)
1310 "HPA detected: current %llu, native %llu\n",
1311 (unsigned long long)sectors,
1312 (unsigned long long)native_sectors);
1313 else if (native_sectors < sectors)
1315 "native sectors (%llu) is smaller than sectors (%llu)\n",
1316 (unsigned long long)native_sectors,
1317 (unsigned long long)sectors);
1321 /* let's unlock HPA */
1322 rc = ata_set_max_sectors(dev, native_sectors);
1323 if (rc == -EACCES) {
1324 /* if device aborted the command, skip HPA resizing */
1326 "device aborted resize (%llu -> %llu), skipping HPA handling\n",
1327 (unsigned long long)sectors,
1328 (unsigned long long)native_sectors);
1329 dev->horkage |= ATA_HORKAGE_BROKEN_HPA;
1334 /* re-read IDENTIFY data */
1335 rc = ata_dev_reread_id(dev, 0);
1338 "failed to re-read IDENTIFY data after HPA resizing\n");
1343 u64 new_sectors = ata_id_n_sectors(dev->id);
1345 "HPA unlocked: %llu -> %llu, native %llu\n",
1346 (unsigned long long)sectors,
1347 (unsigned long long)new_sectors,
1348 (unsigned long long)native_sectors);
1355 * ata_dump_id - IDENTIFY DEVICE info debugging output
1356 * @id: IDENTIFY DEVICE page to dump
1358 * Dump selected 16-bit words from the given IDENTIFY DEVICE
1365 static inline void ata_dump_id(const u16 *id)
1367 DPRINTK("49==0x%04x "
1377 DPRINTK("80==0x%04x "
1387 DPRINTK("88==0x%04x "
1394 * ata_id_xfermask - Compute xfermask from the given IDENTIFY data
1395 * @id: IDENTIFY data to compute xfer mask from
1397 * Compute the xfermask for this device. This is not as trivial
1398 * as it seems if we must consider early devices correctly.
1400 * FIXME: pre IDE drive timing (do we care ?).
1408 unsigned long ata_id_xfermask(const u16 *id)
1410 unsigned long pio_mask, mwdma_mask, udma_mask;
1412 /* Usual case. Word 53 indicates word 64 is valid */
1413 if (id[ATA_ID_FIELD_VALID] & (1 << 1)) {
1414 pio_mask = id[ATA_ID_PIO_MODES] & 0x03;
1418 /* If word 64 isn't valid then Word 51 high byte holds
1419 * the PIO timing number for the maximum. Turn it into
1422 u8 mode = (id[ATA_ID_OLD_PIO_MODES] >> 8) & 0xFF;
1423 if (mode < 5) /* Valid PIO range */
1424 pio_mask = (2 << mode) - 1;
1428 /* But wait.. there's more. Design your standards by
1429 * committee and you too can get a free iordy field to
1430 * process. However its the speeds not the modes that
1431 * are supported... Note drivers using the timing API
1432 * will get this right anyway
1436 mwdma_mask = id[ATA_ID_MWDMA_MODES] & 0x07;
1438 if (ata_id_is_cfa(id)) {
1440 * Process compact flash extended modes
1442 int pio = (id[ATA_ID_CFA_MODES] >> 0) & 0x7;
1443 int dma = (id[ATA_ID_CFA_MODES] >> 3) & 0x7;
1446 pio_mask |= (1 << 5);
1448 pio_mask |= (1 << 6);
1450 mwdma_mask |= (1 << 3);
1452 mwdma_mask |= (1 << 4);
1456 if (id[ATA_ID_FIELD_VALID] & (1 << 2))
1457 udma_mask = id[ATA_ID_UDMA_MODES] & 0xff;
1459 return ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask);
1461 EXPORT_SYMBOL_GPL(ata_id_xfermask);
1463 static void ata_qc_complete_internal(struct ata_queued_cmd *qc)
1465 struct completion *waiting = qc->private_data;
1471 * ata_exec_internal_sg - execute libata internal command
1472 * @dev: Device to which the command is sent
1473 * @tf: Taskfile registers for the command and the result
1474 * @cdb: CDB for packet command
1475 * @dma_dir: Data transfer direction of the command
1476 * @sgl: sg list for the data buffer of the command
1477 * @n_elem: Number of sg entries
1478 * @timeout: Timeout in msecs (0 for default)
1480 * Executes libata internal command with timeout. @tf contains
1481 * command on entry and result on return. Timeout and error
1482 * conditions are reported via return value. No recovery action
1483 * is taken after a command times out. It's caller's duty to
1484 * clean up after timeout.
1487 * None. Should be called with kernel context, might sleep.
1490 * Zero on success, AC_ERR_* mask on failure
1492 unsigned ata_exec_internal_sg(struct ata_device *dev,
1493 struct ata_taskfile *tf, const u8 *cdb,
1494 int dma_dir, struct scatterlist *sgl,
1495 unsigned int n_elem, unsigned long timeout)
1497 struct ata_link *link = dev->link;
1498 struct ata_port *ap = link->ap;
1499 u8 command = tf->command;
1500 int auto_timeout = 0;
1501 struct ata_queued_cmd *qc;
1502 unsigned int preempted_tag;
1503 u32 preempted_sactive;
1504 u64 preempted_qc_active;
1505 int preempted_nr_active_links;
1506 DECLARE_COMPLETION_ONSTACK(wait);
1507 unsigned long flags;
1508 unsigned int err_mask;
1511 spin_lock_irqsave(ap->lock, flags);
1513 /* no internal command while frozen */
1514 if (ap->pflags & ATA_PFLAG_FROZEN) {
1515 spin_unlock_irqrestore(ap->lock, flags);
1516 return AC_ERR_SYSTEM;
1519 /* initialize internal qc */
1520 qc = __ata_qc_from_tag(ap, ATA_TAG_INTERNAL);
1522 qc->tag = ATA_TAG_INTERNAL;
1529 preempted_tag = link->active_tag;
1530 preempted_sactive = link->sactive;
1531 preempted_qc_active = ap->qc_active;
1532 preempted_nr_active_links = ap->nr_active_links;
1533 link->active_tag = ATA_TAG_POISON;
1536 ap->nr_active_links = 0;
1538 /* prepare & issue qc */
1541 memcpy(qc->cdb, cdb, ATAPI_CDB_LEN);
1543 /* some SATA bridges need us to indicate data xfer direction */
1544 if (tf->protocol == ATAPI_PROT_DMA && (dev->flags & ATA_DFLAG_DMADIR) &&
1545 dma_dir == DMA_FROM_DEVICE)
1546 qc->tf.feature |= ATAPI_DMADIR;
1548 qc->flags |= ATA_QCFLAG_RESULT_TF;
1549 qc->dma_dir = dma_dir;
1550 if (dma_dir != DMA_NONE) {
1551 unsigned int i, buflen = 0;
1552 struct scatterlist *sg;
1554 for_each_sg(sgl, sg, n_elem, i)
1555 buflen += sg->length;
1557 ata_sg_init(qc, sgl, n_elem);
1558 qc->nbytes = buflen;
1561 qc->private_data = &wait;
1562 qc->complete_fn = ata_qc_complete_internal;
1566 spin_unlock_irqrestore(ap->lock, flags);
1569 if (ata_probe_timeout)
1570 timeout = ata_probe_timeout * 1000;
1572 timeout = ata_internal_cmd_timeout(dev, command);
1577 if (ap->ops->error_handler)
1580 rc = wait_for_completion_timeout(&wait, msecs_to_jiffies(timeout));
1582 if (ap->ops->error_handler)
1585 ata_sff_flush_pio_task(ap);
1588 spin_lock_irqsave(ap->lock, flags);
1590 /* We're racing with irq here. If we lose, the
1591 * following test prevents us from completing the qc
1592 * twice. If we win, the port is frozen and will be
1593 * cleaned up by ->post_internal_cmd().
1595 if (qc->flags & ATA_QCFLAG_ACTIVE) {
1596 qc->err_mask |= AC_ERR_TIMEOUT;
1598 if (ap->ops->error_handler)
1599 ata_port_freeze(ap);
1601 ata_qc_complete(qc);
1603 if (ata_msg_warn(ap))
1604 ata_dev_warn(dev, "qc timeout (cmd 0x%x)\n",
1608 spin_unlock_irqrestore(ap->lock, flags);
1611 /* do post_internal_cmd */
1612 if (ap->ops->post_internal_cmd)
1613 ap->ops->post_internal_cmd(qc);
1615 /* perform minimal error analysis */
1616 if (qc->flags & ATA_QCFLAG_FAILED) {
1617 if (qc->result_tf.command & (ATA_ERR | ATA_DF))
1618 qc->err_mask |= AC_ERR_DEV;
1621 qc->err_mask |= AC_ERR_OTHER;
1623 if (qc->err_mask & ~AC_ERR_OTHER)
1624 qc->err_mask &= ~AC_ERR_OTHER;
1625 } else if (qc->tf.command == ATA_CMD_REQ_SENSE_DATA) {
1626 qc->result_tf.command |= ATA_SENSE;
1630 spin_lock_irqsave(ap->lock, flags);
1632 *tf = qc->result_tf;
1633 err_mask = qc->err_mask;
1636 link->active_tag = preempted_tag;
1637 link->sactive = preempted_sactive;
1638 ap->qc_active = preempted_qc_active;
1639 ap->nr_active_links = preempted_nr_active_links;
1641 spin_unlock_irqrestore(ap->lock, flags);
1643 if ((err_mask & AC_ERR_TIMEOUT) && auto_timeout)
1644 ata_internal_cmd_timed_out(dev, command);
1650 * ata_exec_internal - execute libata internal command
1651 * @dev: Device to which the command is sent
1652 * @tf: Taskfile registers for the command and the result
1653 * @cdb: CDB for packet command
1654 * @dma_dir: Data transfer direction of the command
1655 * @buf: Data buffer of the command
1656 * @buflen: Length of data buffer
1657 * @timeout: Timeout in msecs (0 for default)
1659 * Wrapper around ata_exec_internal_sg() which takes simple
1660 * buffer instead of sg list.
1663 * None. Should be called with kernel context, might sleep.
1666 * Zero on success, AC_ERR_* mask on failure
1668 unsigned ata_exec_internal(struct ata_device *dev,
1669 struct ata_taskfile *tf, const u8 *cdb,
1670 int dma_dir, void *buf, unsigned int buflen,
1671 unsigned long timeout)
1673 struct scatterlist *psg = NULL, sg;
1674 unsigned int n_elem = 0;
1676 if (dma_dir != DMA_NONE) {
1678 sg_init_one(&sg, buf, buflen);
1683 return ata_exec_internal_sg(dev, tf, cdb, dma_dir, psg, n_elem,
1688 * ata_pio_need_iordy - check if iordy needed
1691 * Check if the current speed of the device requires IORDY. Used
1692 * by various controllers for chip configuration.
1694 unsigned int ata_pio_need_iordy(const struct ata_device *adev)
1696 /* Don't set IORDY if we're preparing for reset. IORDY may
1697 * lead to controller lock up on certain controllers if the
1698 * port is not occupied. See bko#11703 for details.
1700 if (adev->link->ap->pflags & ATA_PFLAG_RESETTING)
1702 /* Controller doesn't support IORDY. Probably a pointless
1703 * check as the caller should know this.
1705 if (adev->link->ap->flags & ATA_FLAG_NO_IORDY)
1707 /* CF spec. r4.1 Table 22 says no iordy on PIO5 and PIO6. */
1708 if (ata_id_is_cfa(adev->id)
1709 && (adev->pio_mode == XFER_PIO_5 || adev->pio_mode == XFER_PIO_6))
1711 /* PIO3 and higher it is mandatory */
1712 if (adev->pio_mode > XFER_PIO_2)
1714 /* We turn it on when possible */
1715 if (ata_id_has_iordy(adev->id))
1719 EXPORT_SYMBOL_GPL(ata_pio_need_iordy);
1722 * ata_pio_mask_no_iordy - Return the non IORDY mask
1725 * Compute the highest mode possible if we are not using iordy. Return
1726 * -1 if no iordy mode is available.
1728 static u32 ata_pio_mask_no_iordy(const struct ata_device *adev)
1730 /* If we have no drive specific rule, then PIO 2 is non IORDY */
1731 if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE */
1732 u16 pio = adev->id[ATA_ID_EIDE_PIO];
1733 /* Is the speed faster than the drive allows non IORDY ? */
1735 /* This is cycle times not frequency - watch the logic! */
1736 if (pio > 240) /* PIO2 is 240nS per cycle */
1737 return 3 << ATA_SHIFT_PIO;
1738 return 7 << ATA_SHIFT_PIO;
1741 return 3 << ATA_SHIFT_PIO;
1745 * ata_do_dev_read_id - default ID read method
1747 * @tf: proposed taskfile
1750 * Issue the identify taskfile and hand back the buffer containing
1751 * identify data. For some RAID controllers and for pre ATA devices
1752 * this function is wrapped or replaced by the driver
1754 unsigned int ata_do_dev_read_id(struct ata_device *dev,
1755 struct ata_taskfile *tf, u16 *id)
1757 return ata_exec_internal(dev, tf, NULL, DMA_FROM_DEVICE,
1758 id, sizeof(id[0]) * ATA_ID_WORDS, 0);
1760 EXPORT_SYMBOL_GPL(ata_do_dev_read_id);
1763 * ata_dev_read_id - Read ID data from the specified device
1764 * @dev: target device
1765 * @p_class: pointer to class of the target device (may be changed)
1766 * @flags: ATA_READID_* flags
1767 * @id: buffer to read IDENTIFY data into
1769 * Read ID data from the specified device. ATA_CMD_ID_ATA is
1770 * performed on ATA devices and ATA_CMD_ID_ATAPI on ATAPI
1771 * devices. This function also issues ATA_CMD_INIT_DEV_PARAMS
1772 * for pre-ATA4 drives.
1774 * FIXME: ATA_CMD_ID_ATA is optional for early drives and right
1775 * now we abort if we hit that case.
1778 * Kernel thread context (may sleep)
1781 * 0 on success, -errno otherwise.
1783 int ata_dev_read_id(struct ata_device *dev, unsigned int *p_class,
1784 unsigned int flags, u16 *id)
1786 struct ata_port *ap = dev->link->ap;
1787 unsigned int class = *p_class;
1788 struct ata_taskfile tf;
1789 unsigned int err_mask = 0;
1791 bool is_semb = class == ATA_DEV_SEMB;
1792 int may_fallback = 1, tried_spinup = 0;
1795 if (ata_msg_ctl(ap))
1796 ata_dev_dbg(dev, "%s: ENTER\n", __func__);
1799 ata_tf_init(dev, &tf);
1803 class = ATA_DEV_ATA; /* some hard drives report SEMB sig */
1807 tf.command = ATA_CMD_ID_ATA;
1810 tf.command = ATA_CMD_ID_ATAPI;
1814 reason = "unsupported class";
1818 tf.protocol = ATA_PROT_PIO;
1820 /* Some devices choke if TF registers contain garbage. Make
1821 * sure those are properly initialized.
1823 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
1825 /* Device presence detection is unreliable on some
1826 * controllers. Always poll IDENTIFY if available.
1828 tf.flags |= ATA_TFLAG_POLLING;
1830 if (ap->ops->read_id)
1831 err_mask = ap->ops->read_id(dev, &tf, id);
1833 err_mask = ata_do_dev_read_id(dev, &tf, id);
1836 if (err_mask & AC_ERR_NODEV_HINT) {
1837 ata_dev_dbg(dev, "NODEV after polling detection\n");
1843 "IDENTIFY failed on device w/ SEMB sig, disabled\n");
1844 /* SEMB is not supported yet */
1845 *p_class = ATA_DEV_SEMB_UNSUP;
1849 if ((err_mask == AC_ERR_DEV) && (tf.feature & ATA_ABORTED)) {
1850 /* Device or controller might have reported
1851 * the wrong device class. Give a shot at the
1852 * other IDENTIFY if the current one is
1853 * aborted by the device.
1858 if (class == ATA_DEV_ATA)
1859 class = ATA_DEV_ATAPI;
1861 class = ATA_DEV_ATA;
1865 /* Control reaches here iff the device aborted
1866 * both flavors of IDENTIFYs which happens
1867 * sometimes with phantom devices.
1870 "both IDENTIFYs aborted, assuming NODEV\n");
1875 reason = "I/O error";
1879 if (dev->horkage & ATA_HORKAGE_DUMP_ID) {
1880 ata_dev_dbg(dev, "dumping IDENTIFY data, "
1881 "class=%d may_fallback=%d tried_spinup=%d\n",
1882 class, may_fallback, tried_spinup);
1883 print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET,
1884 16, 2, id, ATA_ID_WORDS * sizeof(*id), true);
1887 /* Falling back doesn't make sense if ID data was read
1888 * successfully at least once.
1892 swap_buf_le16(id, ATA_ID_WORDS);
1896 reason = "device reports invalid type";
1898 if (class == ATA_DEV_ATA || class == ATA_DEV_ZAC) {
1899 if (!ata_id_is_ata(id) && !ata_id_is_cfa(id))
1901 if (ap->host->flags & ATA_HOST_IGNORE_ATA &&
1902 ata_id_is_ata(id)) {
1904 "host indicates ignore ATA devices, ignored\n");
1908 if (ata_id_is_ata(id))
1912 if (!tried_spinup && (id[2] == 0x37c8 || id[2] == 0x738c)) {
1915 * Drive powered-up in standby mode, and requires a specific
1916 * SET_FEATURES spin-up subcommand before it will accept
1917 * anything other than the original IDENTIFY command.
1919 err_mask = ata_dev_set_feature(dev, SETFEATURES_SPINUP, 0);
1920 if (err_mask && id[2] != 0x738c) {
1922 reason = "SPINUP failed";
1926 * If the drive initially returned incomplete IDENTIFY info,
1927 * we now must reissue the IDENTIFY command.
1929 if (id[2] == 0x37c8)
1933 if ((flags & ATA_READID_POSTRESET) &&
1934 (class == ATA_DEV_ATA || class == ATA_DEV_ZAC)) {
1936 * The exact sequence expected by certain pre-ATA4 drives is:
1938 * IDENTIFY (optional in early ATA)
1939 * INITIALIZE DEVICE PARAMETERS (later IDE and ATA)
1941 * Some drives were very specific about that exact sequence.
1943 * Note that ATA4 says lba is mandatory so the second check
1944 * should never trigger.
1946 if (ata_id_major_version(id) < 4 || !ata_id_has_lba(id)) {
1947 err_mask = ata_dev_init_params(dev, id[3], id[6]);
1950 reason = "INIT_DEV_PARAMS failed";
1954 /* current CHS translation info (id[53-58]) might be
1955 * changed. reread the identify device info.
1957 flags &= ~ATA_READID_POSTRESET;
1967 if (ata_msg_warn(ap))
1968 ata_dev_warn(dev, "failed to IDENTIFY (%s, err_mask=0x%x)\n",
1974 * ata_read_log_page - read a specific log page
1975 * @dev: target device
1977 * @page: page to read
1978 * @buf: buffer to store read page
1979 * @sectors: number of sectors to read
1981 * Read log page using READ_LOG_EXT command.
1984 * Kernel thread context (may sleep).
1987 * 0 on success, AC_ERR_* mask otherwise.
1989 unsigned int ata_read_log_page(struct ata_device *dev, u8 log,
1990 u8 page, void *buf, unsigned int sectors)
1992 unsigned long ap_flags = dev->link->ap->flags;
1993 struct ata_taskfile tf;
1994 unsigned int err_mask;
1997 DPRINTK("read log page - log 0x%x, page 0x%x\n", log, page);
2000 * Return error without actually issuing the command on controllers
2001 * which e.g. lockup on a read log page.
2003 if (ap_flags & ATA_FLAG_NO_LOG_PAGE)
2007 ata_tf_init(dev, &tf);
2008 if (dev->dma_mode && ata_id_has_read_log_dma_ext(dev->id) &&
2009 !(dev->horkage & ATA_HORKAGE_NO_DMA_LOG)) {
2010 tf.command = ATA_CMD_READ_LOG_DMA_EXT;
2011 tf.protocol = ATA_PROT_DMA;
2014 tf.command = ATA_CMD_READ_LOG_EXT;
2015 tf.protocol = ATA_PROT_PIO;
2021 tf.hob_nsect = sectors >> 8;
2022 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_LBA48 | ATA_TFLAG_DEVICE;
2024 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_FROM_DEVICE,
2025 buf, sectors * ATA_SECT_SIZE, 0);
2027 if (err_mask && dma) {
2028 dev->horkage |= ATA_HORKAGE_NO_DMA_LOG;
2029 ata_dev_warn(dev, "READ LOG DMA EXT failed, trying PIO\n");
2033 DPRINTK("EXIT, err_mask=%x\n", err_mask);
2037 static bool ata_log_supported(struct ata_device *dev, u8 log)
2039 struct ata_port *ap = dev->link->ap;
2041 if (ata_read_log_page(dev, ATA_LOG_DIRECTORY, 0, ap->sector_buf, 1))
2043 return get_unaligned_le16(&ap->sector_buf[log * 2]) ? true : false;
2046 static bool ata_identify_page_supported(struct ata_device *dev, u8 page)
2048 struct ata_port *ap = dev->link->ap;
2049 unsigned int err, i;
2051 if (!ata_log_supported(dev, ATA_LOG_IDENTIFY_DEVICE)) {
2052 ata_dev_warn(dev, "ATA Identify Device Log not supported\n");
2057 * Read IDENTIFY DEVICE data log, page 0, to figure out if the page is
2060 err = ata_read_log_page(dev, ATA_LOG_IDENTIFY_DEVICE, 0, ap->sector_buf,
2064 "failed to get Device Identify Log Emask 0x%x\n",
2069 for (i = 0; i < ap->sector_buf[8]; i++) {
2070 if (ap->sector_buf[9 + i] == page)
2077 static int ata_do_link_spd_horkage(struct ata_device *dev)
2079 struct ata_link *plink = ata_dev_phys_link(dev);
2080 u32 target, target_limit;
2082 if (!sata_scr_valid(plink))
2085 if (dev->horkage & ATA_HORKAGE_1_5_GBPS)
2090 target_limit = (1 << target) - 1;
2092 /* if already on stricter limit, no need to push further */
2093 if (plink->sata_spd_limit <= target_limit)
2096 plink->sata_spd_limit = target_limit;
2098 /* Request another EH round by returning -EAGAIN if link is
2099 * going faster than the target speed. Forward progress is
2100 * guaranteed by setting sata_spd_limit to target_limit above.
2102 if (plink->sata_spd > target) {
2103 ata_dev_info(dev, "applying link speed limit horkage to %s\n",
2104 sata_spd_string(target));
2110 static inline u8 ata_dev_knobble(struct ata_device *dev)
2112 struct ata_port *ap = dev->link->ap;
2114 if (ata_dev_blacklisted(dev) & ATA_HORKAGE_BRIDGE_OK)
2117 return ((ap->cbl == ATA_CBL_SATA) && (!ata_id_is_sata(dev->id)));
2120 static void ata_dev_config_ncq_send_recv(struct ata_device *dev)
2122 struct ata_port *ap = dev->link->ap;
2123 unsigned int err_mask;
2125 if (!ata_log_supported(dev, ATA_LOG_NCQ_SEND_RECV)) {
2126 ata_dev_warn(dev, "NCQ Send/Recv Log not supported\n");
2129 err_mask = ata_read_log_page(dev, ATA_LOG_NCQ_SEND_RECV,
2130 0, ap->sector_buf, 1);
2133 "failed to get NCQ Send/Recv Log Emask 0x%x\n",
2136 u8 *cmds = dev->ncq_send_recv_cmds;
2138 dev->flags |= ATA_DFLAG_NCQ_SEND_RECV;
2139 memcpy(cmds, ap->sector_buf, ATA_LOG_NCQ_SEND_RECV_SIZE);
2141 if (dev->horkage & ATA_HORKAGE_NO_NCQ_TRIM) {
2142 ata_dev_dbg(dev, "disabling queued TRIM support\n");
2143 cmds[ATA_LOG_NCQ_SEND_RECV_DSM_OFFSET] &=
2144 ~ATA_LOG_NCQ_SEND_RECV_DSM_TRIM;
2149 static void ata_dev_config_ncq_non_data(struct ata_device *dev)
2151 struct ata_port *ap = dev->link->ap;
2152 unsigned int err_mask;
2154 if (!ata_log_supported(dev, ATA_LOG_NCQ_NON_DATA)) {
2156 "NCQ Send/Recv Log not supported\n");
2159 err_mask = ata_read_log_page(dev, ATA_LOG_NCQ_NON_DATA,
2160 0, ap->sector_buf, 1);
2163 "failed to get NCQ Non-Data Log Emask 0x%x\n",
2166 u8 *cmds = dev->ncq_non_data_cmds;
2168 memcpy(cmds, ap->sector_buf, ATA_LOG_NCQ_NON_DATA_SIZE);
2172 static void ata_dev_config_ncq_prio(struct ata_device *dev)
2174 struct ata_port *ap = dev->link->ap;
2175 unsigned int err_mask;
2177 if (!(dev->flags & ATA_DFLAG_NCQ_PRIO_ENABLE)) {
2178 dev->flags &= ~ATA_DFLAG_NCQ_PRIO;
2182 err_mask = ata_read_log_page(dev,
2183 ATA_LOG_IDENTIFY_DEVICE,
2184 ATA_LOG_SATA_SETTINGS,
2189 "failed to get Identify Device data, Emask 0x%x\n",
2194 if (ap->sector_buf[ATA_LOG_NCQ_PRIO_OFFSET] & BIT(3)) {
2195 dev->flags |= ATA_DFLAG_NCQ_PRIO;
2197 dev->flags &= ~ATA_DFLAG_NCQ_PRIO;
2198 ata_dev_dbg(dev, "SATA page does not support priority\n");
2203 static int ata_dev_config_ncq(struct ata_device *dev,
2204 char *desc, size_t desc_sz)
2206 struct ata_port *ap = dev->link->ap;
2207 int hdepth = 0, ddepth = ata_id_queue_depth(dev->id);
2208 unsigned int err_mask;
2211 if (!ata_id_has_ncq(dev->id)) {
2215 if (!IS_ENABLED(CONFIG_SATA_HOST))
2217 if (dev->horkage & ATA_HORKAGE_NONCQ) {
2218 snprintf(desc, desc_sz, "NCQ (not used)");
2221 if (ap->flags & ATA_FLAG_NCQ) {
2222 hdepth = min(ap->scsi_host->can_queue, ATA_MAX_QUEUE);
2223 dev->flags |= ATA_DFLAG_NCQ;
2226 if (!(dev->horkage & ATA_HORKAGE_BROKEN_FPDMA_AA) &&
2227 (ap->flags & ATA_FLAG_FPDMA_AA) &&
2228 ata_id_has_fpdma_aa(dev->id)) {
2229 err_mask = ata_dev_set_feature(dev, SETFEATURES_SATA_ENABLE,
2233 "failed to enable AA (error_mask=0x%x)\n",
2235 if (err_mask != AC_ERR_DEV) {
2236 dev->horkage |= ATA_HORKAGE_BROKEN_FPDMA_AA;
2243 if (hdepth >= ddepth)
2244 snprintf(desc, desc_sz, "NCQ (depth %d)%s", ddepth, aa_desc);
2246 snprintf(desc, desc_sz, "NCQ (depth %d/%d)%s", hdepth,
2249 if ((ap->flags & ATA_FLAG_FPDMA_AUX)) {
2250 if (ata_id_has_ncq_send_and_recv(dev->id))
2251 ata_dev_config_ncq_send_recv(dev);
2252 if (ata_id_has_ncq_non_data(dev->id))
2253 ata_dev_config_ncq_non_data(dev);
2254 if (ata_id_has_ncq_prio(dev->id))
2255 ata_dev_config_ncq_prio(dev);
2261 static void ata_dev_config_sense_reporting(struct ata_device *dev)
2263 unsigned int err_mask;
2265 if (!ata_id_has_sense_reporting(dev->id))
2268 if (ata_id_sense_reporting_enabled(dev->id))
2271 err_mask = ata_dev_set_feature(dev, SETFEATURE_SENSE_DATA, 0x1);
2274 "failed to enable Sense Data Reporting, Emask 0x%x\n",
2279 static void ata_dev_config_zac(struct ata_device *dev)
2281 struct ata_port *ap = dev->link->ap;
2282 unsigned int err_mask;
2283 u8 *identify_buf = ap->sector_buf;
2285 dev->zac_zones_optimal_open = U32_MAX;
2286 dev->zac_zones_optimal_nonseq = U32_MAX;
2287 dev->zac_zones_max_open = U32_MAX;
2290 * Always set the 'ZAC' flag for Host-managed devices.
2292 if (dev->class == ATA_DEV_ZAC)
2293 dev->flags |= ATA_DFLAG_ZAC;
2294 else if (ata_id_zoned_cap(dev->id) == 0x01)
2296 * Check for host-aware devices.
2298 dev->flags |= ATA_DFLAG_ZAC;
2300 if (!(dev->flags & ATA_DFLAG_ZAC))
2303 if (!ata_identify_page_supported(dev, ATA_LOG_ZONED_INFORMATION)) {
2305 "ATA Zoned Information Log not supported\n");
2310 * Read IDENTIFY DEVICE data log, page 9 (Zoned-device information)
2312 err_mask = ata_read_log_page(dev, ATA_LOG_IDENTIFY_DEVICE,
2313 ATA_LOG_ZONED_INFORMATION,
2316 u64 zoned_cap, opt_open, opt_nonseq, max_open;
2318 zoned_cap = get_unaligned_le64(&identify_buf[8]);
2319 if ((zoned_cap >> 63))
2320 dev->zac_zoned_cap = (zoned_cap & 1);
2321 opt_open = get_unaligned_le64(&identify_buf[24]);
2322 if ((opt_open >> 63))
2323 dev->zac_zones_optimal_open = (u32)opt_open;
2324 opt_nonseq = get_unaligned_le64(&identify_buf[32]);
2325 if ((opt_nonseq >> 63))
2326 dev->zac_zones_optimal_nonseq = (u32)opt_nonseq;
2327 max_open = get_unaligned_le64(&identify_buf[40]);
2328 if ((max_open >> 63))
2329 dev->zac_zones_max_open = (u32)max_open;
2333 static void ata_dev_config_trusted(struct ata_device *dev)
2335 struct ata_port *ap = dev->link->ap;
2339 if (!ata_id_has_trusted(dev->id))
2342 if (!ata_identify_page_supported(dev, ATA_LOG_SECURITY)) {
2344 "Security Log not supported\n");
2348 err = ata_read_log_page(dev, ATA_LOG_IDENTIFY_DEVICE, ATA_LOG_SECURITY,
2352 "failed to read Security Log, Emask 0x%x\n", err);
2356 trusted_cap = get_unaligned_le64(&ap->sector_buf[40]);
2357 if (!(trusted_cap & (1ULL << 63))) {
2359 "Trusted Computing capability qword not valid!\n");
2363 if (trusted_cap & (1 << 0))
2364 dev->flags |= ATA_DFLAG_TRUSTED;
2368 * ata_dev_configure - Configure the specified ATA/ATAPI device
2369 * @dev: Target device to configure
2371 * Configure @dev according to @dev->id. Generic and low-level
2372 * driver specific fixups are also applied.
2375 * Kernel thread context (may sleep)
2378 * 0 on success, -errno otherwise
2380 int ata_dev_configure(struct ata_device *dev)
2382 struct ata_port *ap = dev->link->ap;
2383 struct ata_eh_context *ehc = &dev->link->eh_context;
2384 int print_info = ehc->i.flags & ATA_EHI_PRINTINFO;
2385 const u16 *id = dev->id;
2386 unsigned long xfer_mask;
2387 unsigned int err_mask;
2388 char revbuf[7]; /* XYZ-99\0 */
2389 char fwrevbuf[ATA_ID_FW_REV_LEN+1];
2390 char modelbuf[ATA_ID_PROD_LEN+1];
2393 if (!ata_dev_enabled(dev) && ata_msg_info(ap)) {
2394 ata_dev_info(dev, "%s: ENTER/EXIT -- nodev\n", __func__);
2398 if (ata_msg_probe(ap))
2399 ata_dev_dbg(dev, "%s: ENTER\n", __func__);
2402 dev->horkage |= ata_dev_blacklisted(dev);
2403 ata_force_horkage(dev);
2405 if (dev->horkage & ATA_HORKAGE_DISABLE) {
2406 ata_dev_info(dev, "unsupported device, disabling\n");
2407 ata_dev_disable(dev);
2411 if ((!atapi_enabled || (ap->flags & ATA_FLAG_NO_ATAPI)) &&
2412 dev->class == ATA_DEV_ATAPI) {
2413 ata_dev_warn(dev, "WARNING: ATAPI is %s, device ignored\n",
2414 atapi_enabled ? "not supported with this driver"
2416 ata_dev_disable(dev);
2420 rc = ata_do_link_spd_horkage(dev);
2424 /* some WD SATA-1 drives have issues with LPM, turn on NOLPM for them */
2425 if ((dev->horkage & ATA_HORKAGE_WD_BROKEN_LPM) &&
2426 (id[ATA_ID_SATA_CAPABILITY] & 0xe) == 0x2)
2427 dev->horkage |= ATA_HORKAGE_NOLPM;
2429 if (ap->flags & ATA_FLAG_NO_LPM)
2430 dev->horkage |= ATA_HORKAGE_NOLPM;
2432 if (dev->horkage & ATA_HORKAGE_NOLPM) {
2433 ata_dev_warn(dev, "LPM support broken, forcing max_power\n");
2434 dev->link->ap->target_lpm_policy = ATA_LPM_MAX_POWER;
2437 /* let ACPI work its magic */
2438 rc = ata_acpi_on_devcfg(dev);
2442 /* massage HPA, do it early as it might change IDENTIFY data */
2443 rc = ata_hpa_resize(dev);
2447 /* print device capabilities */
2448 if (ata_msg_probe(ap))
2450 "%s: cfg 49:%04x 82:%04x 83:%04x 84:%04x "
2451 "85:%04x 86:%04x 87:%04x 88:%04x\n",
2453 id[49], id[82], id[83], id[84],
2454 id[85], id[86], id[87], id[88]);
2456 /* initialize to-be-configured parameters */
2457 dev->flags &= ~ATA_DFLAG_CFG_MASK;
2458 dev->max_sectors = 0;
2464 dev->multi_count = 0;
2467 * common ATA, ATAPI feature tests
2470 /* find max transfer mode; for printk only */
2471 xfer_mask = ata_id_xfermask(id);
2473 if (ata_msg_probe(ap))
2476 /* SCSI only uses 4-char revisions, dump full 8 chars from ATA */
2477 ata_id_c_string(dev->id, fwrevbuf, ATA_ID_FW_REV,
2480 ata_id_c_string(dev->id, modelbuf, ATA_ID_PROD,
2483 /* ATA-specific feature tests */
2484 if (dev->class == ATA_DEV_ATA || dev->class == ATA_DEV_ZAC) {
2485 if (ata_id_is_cfa(id)) {
2486 /* CPRM may make this media unusable */
2487 if (id[ATA_ID_CFA_KEY_MGMT] & 1)
2489 "supports DRM functions and may not be fully accessible\n");
2490 snprintf(revbuf, 7, "CFA");
2492 snprintf(revbuf, 7, "ATA-%d", ata_id_major_version(id));
2493 /* Warn the user if the device has TPM extensions */
2494 if (ata_id_has_tpm(id))
2496 "supports DRM functions and may not be fully accessible\n");
2499 dev->n_sectors = ata_id_n_sectors(id);
2501 /* get current R/W Multiple count setting */
2502 if ((dev->id[47] >> 8) == 0x80 && (dev->id[59] & 0x100)) {
2503 unsigned int max = dev->id[47] & 0xff;
2504 unsigned int cnt = dev->id[59] & 0xff;
2505 /* only recognize/allow powers of two here */
2506 if (is_power_of_2(max) && is_power_of_2(cnt))
2508 dev->multi_count = cnt;
2511 if (ata_id_has_lba(id)) {
2512 const char *lba_desc;
2516 dev->flags |= ATA_DFLAG_LBA;
2517 if (ata_id_has_lba48(id)) {
2518 dev->flags |= ATA_DFLAG_LBA48;
2521 if (dev->n_sectors >= (1UL << 28) &&
2522 ata_id_has_flush_ext(id))
2523 dev->flags |= ATA_DFLAG_FLUSH_EXT;
2527 rc = ata_dev_config_ncq(dev, ncq_desc, sizeof(ncq_desc));
2531 /* print device info to dmesg */
2532 if (ata_msg_drv(ap) && print_info) {
2533 ata_dev_info(dev, "%s: %s, %s, max %s\n",
2534 revbuf, modelbuf, fwrevbuf,
2535 ata_mode_string(xfer_mask));
2537 "%llu sectors, multi %u: %s %s\n",
2538 (unsigned long long)dev->n_sectors,
2539 dev->multi_count, lba_desc, ncq_desc);
2544 /* Default translation */
2545 dev->cylinders = id[1];
2547 dev->sectors = id[6];
2549 if (ata_id_current_chs_valid(id)) {
2550 /* Current CHS translation is valid. */
2551 dev->cylinders = id[54];
2552 dev->heads = id[55];
2553 dev->sectors = id[56];
2556 /* print device info to dmesg */
2557 if (ata_msg_drv(ap) && print_info) {
2558 ata_dev_info(dev, "%s: %s, %s, max %s\n",
2559 revbuf, modelbuf, fwrevbuf,
2560 ata_mode_string(xfer_mask));
2562 "%llu sectors, multi %u, CHS %u/%u/%u\n",
2563 (unsigned long long)dev->n_sectors,
2564 dev->multi_count, dev->cylinders,
2565 dev->heads, dev->sectors);
2569 /* Check and mark DevSlp capability. Get DevSlp timing variables
2570 * from SATA Settings page of Identify Device Data Log.
2572 if (ata_id_has_devslp(dev->id)) {
2573 u8 *sata_setting = ap->sector_buf;
2576 dev->flags |= ATA_DFLAG_DEVSLP;
2577 err_mask = ata_read_log_page(dev,
2578 ATA_LOG_IDENTIFY_DEVICE,
2579 ATA_LOG_SATA_SETTINGS,
2584 "failed to get Identify Device Data, Emask 0x%x\n",
2587 for (i = 0; i < ATA_LOG_DEVSLP_SIZE; i++) {
2588 j = ATA_LOG_DEVSLP_OFFSET + i;
2589 dev->devslp_timing[i] = sata_setting[j];
2592 ata_dev_config_sense_reporting(dev);
2593 ata_dev_config_zac(dev);
2594 ata_dev_config_trusted(dev);
2598 /* ATAPI-specific feature tests */
2599 else if (dev->class == ATA_DEV_ATAPI) {
2600 const char *cdb_intr_string = "";
2601 const char *atapi_an_string = "";
2602 const char *dma_dir_string = "";
2605 rc = atapi_cdb_len(id);
2606 if ((rc < 12) || (rc > ATAPI_CDB_LEN)) {
2607 if (ata_msg_warn(ap))
2608 ata_dev_warn(dev, "unsupported CDB len\n");
2612 dev->cdb_len = (unsigned int) rc;
2614 /* Enable ATAPI AN if both the host and device have
2615 * the support. If PMP is attached, SNTF is required
2616 * to enable ATAPI AN to discern between PHY status
2617 * changed notifications and ATAPI ANs.
2620 (ap->flags & ATA_FLAG_AN) && ata_id_has_atapi_AN(id) &&
2621 (!sata_pmp_attached(ap) ||
2622 sata_scr_read(&ap->link, SCR_NOTIFICATION, &sntf) == 0)) {
2623 /* issue SET feature command to turn this on */
2624 err_mask = ata_dev_set_feature(dev,
2625 SETFEATURES_SATA_ENABLE, SATA_AN);
2628 "failed to enable ATAPI AN (err_mask=0x%x)\n",
2631 dev->flags |= ATA_DFLAG_AN;
2632 atapi_an_string = ", ATAPI AN";
2636 if (ata_id_cdb_intr(dev->id)) {
2637 dev->flags |= ATA_DFLAG_CDB_INTR;
2638 cdb_intr_string = ", CDB intr";
2641 if (atapi_dmadir || (dev->horkage & ATA_HORKAGE_ATAPI_DMADIR) || atapi_id_dmadir(dev->id)) {
2642 dev->flags |= ATA_DFLAG_DMADIR;
2643 dma_dir_string = ", DMADIR";
2646 if (ata_id_has_da(dev->id)) {
2647 dev->flags |= ATA_DFLAG_DA;
2651 /* print device info to dmesg */
2652 if (ata_msg_drv(ap) && print_info)
2654 "ATAPI: %s, %s, max %s%s%s%s\n",
2656 ata_mode_string(xfer_mask),
2657 cdb_intr_string, atapi_an_string,
2661 /* determine max_sectors */
2662 dev->max_sectors = ATA_MAX_SECTORS;
2663 if (dev->flags & ATA_DFLAG_LBA48)
2664 dev->max_sectors = ATA_MAX_SECTORS_LBA48;
2666 /* Limit PATA drive on SATA cable bridge transfers to udma5,
2668 if (ata_dev_knobble(dev)) {
2669 if (ata_msg_drv(ap) && print_info)
2670 ata_dev_info(dev, "applying bridge limits\n");
2671 dev->udma_mask &= ATA_UDMA5;
2672 dev->max_sectors = ATA_MAX_SECTORS;
2675 if ((dev->class == ATA_DEV_ATAPI) &&
2676 (atapi_command_packet_set(id) == TYPE_TAPE)) {
2677 dev->max_sectors = ATA_MAX_SECTORS_TAPE;
2678 dev->horkage |= ATA_HORKAGE_STUCK_ERR;
2681 if (dev->horkage & ATA_HORKAGE_MAX_SEC_128)
2682 dev->max_sectors = min_t(unsigned int, ATA_MAX_SECTORS_128,
2685 if (dev->horkage & ATA_HORKAGE_MAX_SEC_1024)
2686 dev->max_sectors = min_t(unsigned int, ATA_MAX_SECTORS_1024,
2689 if (dev->horkage & ATA_HORKAGE_MAX_SEC_LBA48)
2690 dev->max_sectors = ATA_MAX_SECTORS_LBA48;
2692 if (ap->ops->dev_config)
2693 ap->ops->dev_config(dev);
2695 if (dev->horkage & ATA_HORKAGE_DIAGNOSTIC) {
2696 /* Let the user know. We don't want to disallow opens for
2697 rescue purposes, or in case the vendor is just a blithering
2698 idiot. Do this after the dev_config call as some controllers
2699 with buggy firmware may want to avoid reporting false device
2704 "Drive reports diagnostics failure. This may indicate a drive\n");
2706 "fault or invalid emulation. Contact drive vendor for information.\n");
2710 if ((dev->horkage & ATA_HORKAGE_FIRMWARE_WARN) && print_info) {
2711 ata_dev_warn(dev, "WARNING: device requires firmware update to be fully functional\n");
2712 ata_dev_warn(dev, " contact the vendor or visit http://ata.wiki.kernel.org\n");
2718 if (ata_msg_probe(ap))
2719 ata_dev_dbg(dev, "%s: EXIT, err\n", __func__);
2724 * ata_cable_40wire - return 40 wire cable type
2727 * Helper method for drivers which want to hardwire 40 wire cable
2731 int ata_cable_40wire(struct ata_port *ap)
2733 return ATA_CBL_PATA40;
2735 EXPORT_SYMBOL_GPL(ata_cable_40wire);
2738 * ata_cable_80wire - return 80 wire cable type
2741 * Helper method for drivers which want to hardwire 80 wire cable
2745 int ata_cable_80wire(struct ata_port *ap)
2747 return ATA_CBL_PATA80;
2749 EXPORT_SYMBOL_GPL(ata_cable_80wire);
2752 * ata_cable_unknown - return unknown PATA cable.
2755 * Helper method for drivers which have no PATA cable detection.
2758 int ata_cable_unknown(struct ata_port *ap)
2760 return ATA_CBL_PATA_UNK;
2762 EXPORT_SYMBOL_GPL(ata_cable_unknown);
2765 * ata_cable_ignore - return ignored PATA cable.
2768 * Helper method for drivers which don't use cable type to limit
2771 int ata_cable_ignore(struct ata_port *ap)
2773 return ATA_CBL_PATA_IGN;
2775 EXPORT_SYMBOL_GPL(ata_cable_ignore);
2778 * ata_cable_sata - return SATA cable type
2781 * Helper method for drivers which have SATA cables
2784 int ata_cable_sata(struct ata_port *ap)
2786 return ATA_CBL_SATA;
2788 EXPORT_SYMBOL_GPL(ata_cable_sata);
2791 * ata_bus_probe - Reset and probe ATA bus
2794 * Master ATA bus probing function. Initiates a hardware-dependent
2795 * bus reset, then attempts to identify any devices found on
2799 * PCI/etc. bus probe sem.
2802 * Zero on success, negative errno otherwise.
2805 int ata_bus_probe(struct ata_port *ap)
2807 unsigned int classes[ATA_MAX_DEVICES];
2808 int tries[ATA_MAX_DEVICES];
2810 struct ata_device *dev;
2812 ata_for_each_dev(dev, &ap->link, ALL)
2813 tries[dev->devno] = ATA_PROBE_MAX_TRIES;
2816 ata_for_each_dev(dev, &ap->link, ALL) {
2817 /* If we issue an SRST then an ATA drive (not ATAPI)
2818 * may change configuration and be in PIO0 timing. If
2819 * we do a hard reset (or are coming from power on)
2820 * this is true for ATA or ATAPI. Until we've set a
2821 * suitable controller mode we should not touch the
2822 * bus as we may be talking too fast.
2824 dev->pio_mode = XFER_PIO_0;
2825 dev->dma_mode = 0xff;
2827 /* If the controller has a pio mode setup function
2828 * then use it to set the chipset to rights. Don't
2829 * touch the DMA setup as that will be dealt with when
2830 * configuring devices.
2832 if (ap->ops->set_piomode)
2833 ap->ops->set_piomode(ap, dev);
2836 /* reset and determine device classes */
2837 ap->ops->phy_reset(ap);
2839 ata_for_each_dev(dev, &ap->link, ALL) {
2840 if (dev->class != ATA_DEV_UNKNOWN)
2841 classes[dev->devno] = dev->class;
2843 classes[dev->devno] = ATA_DEV_NONE;
2845 dev->class = ATA_DEV_UNKNOWN;
2848 /* read IDENTIFY page and configure devices. We have to do the identify
2849 specific sequence bass-ackwards so that PDIAG- is released by
2852 ata_for_each_dev(dev, &ap->link, ALL_REVERSE) {
2853 if (tries[dev->devno])
2854 dev->class = classes[dev->devno];
2856 if (!ata_dev_enabled(dev))
2859 rc = ata_dev_read_id(dev, &dev->class, ATA_READID_POSTRESET,
2865 /* Now ask for the cable type as PDIAG- should have been released */
2866 if (ap->ops->cable_detect)
2867 ap->cbl = ap->ops->cable_detect(ap);
2869 /* We may have SATA bridge glue hiding here irrespective of
2870 * the reported cable types and sensed types. When SATA
2871 * drives indicate we have a bridge, we don't know which end
2872 * of the link the bridge is which is a problem.
2874 ata_for_each_dev(dev, &ap->link, ENABLED)
2875 if (ata_id_is_sata(dev->id))
2876 ap->cbl = ATA_CBL_SATA;
2878 /* After the identify sequence we can now set up the devices. We do
2879 this in the normal order so that the user doesn't get confused */
2881 ata_for_each_dev(dev, &ap->link, ENABLED) {
2882 ap->link.eh_context.i.flags |= ATA_EHI_PRINTINFO;
2883 rc = ata_dev_configure(dev);
2884 ap->link.eh_context.i.flags &= ~ATA_EHI_PRINTINFO;
2889 /* configure transfer mode */
2890 rc = ata_set_mode(&ap->link, &dev);
2894 ata_for_each_dev(dev, &ap->link, ENABLED)
2900 tries[dev->devno]--;
2904 /* eeek, something went very wrong, give up */
2905 tries[dev->devno] = 0;
2909 /* give it just one more chance */
2910 tries[dev->devno] = min(tries[dev->devno], 1);
2913 if (tries[dev->devno] == 1) {
2914 /* This is the last chance, better to slow
2915 * down than lose it.
2917 sata_down_spd_limit(&ap->link, 0);
2918 ata_down_xfermask_limit(dev, ATA_DNXFER_PIO);
2922 if (!tries[dev->devno])
2923 ata_dev_disable(dev);
2929 * sata_print_link_status - Print SATA link status
2930 * @link: SATA link to printk link status about
2932 * This function prints link speed and status of a SATA link.
2937 static void sata_print_link_status(struct ata_link *link)
2939 u32 sstatus, scontrol, tmp;
2941 if (sata_scr_read(link, SCR_STATUS, &sstatus))
2943 sata_scr_read(link, SCR_CONTROL, &scontrol);
2945 if (ata_phys_link_online(link)) {
2946 tmp = (sstatus >> 4) & 0xf;
2947 ata_link_info(link, "SATA link up %s (SStatus %X SControl %X)\n",
2948 sata_spd_string(tmp), sstatus, scontrol);
2950 ata_link_info(link, "SATA link down (SStatus %X SControl %X)\n",
2956 * ata_dev_pair - return other device on cable
2959 * Obtain the other device on the same cable, or if none is
2960 * present NULL is returned
2963 struct ata_device *ata_dev_pair(struct ata_device *adev)
2965 struct ata_link *link = adev->link;
2966 struct ata_device *pair = &link->device[1 - adev->devno];
2967 if (!ata_dev_enabled(pair))
2971 EXPORT_SYMBOL_GPL(ata_dev_pair);
2974 * sata_down_spd_limit - adjust SATA spd limit downward
2975 * @link: Link to adjust SATA spd limit for
2976 * @spd_limit: Additional limit
2978 * Adjust SATA spd limit of @link downward. Note that this
2979 * function only adjusts the limit. The change must be applied
2980 * using sata_set_spd().
2982 * If @spd_limit is non-zero, the speed is limited to equal to or
2983 * lower than @spd_limit if such speed is supported. If
2984 * @spd_limit is slower than any supported speed, only the lowest
2985 * supported speed is allowed.
2988 * Inherited from caller.
2991 * 0 on success, negative errno on failure
2993 int sata_down_spd_limit(struct ata_link *link, u32 spd_limit)
2995 u32 sstatus, spd, mask;
2998 if (!sata_scr_valid(link))
3001 /* If SCR can be read, use it to determine the current SPD.
3002 * If not, use cached value in link->sata_spd.
3004 rc = sata_scr_read(link, SCR_STATUS, &sstatus);
3005 if (rc == 0 && ata_sstatus_online(sstatus))
3006 spd = (sstatus >> 4) & 0xf;
3008 spd = link->sata_spd;
3010 mask = link->sata_spd_limit;
3014 /* unconditionally mask off the highest bit */
3015 bit = fls(mask) - 1;
3016 mask &= ~(1 << bit);
3019 * Mask off all speeds higher than or equal to the current one. At
3020 * this point, if current SPD is not available and we previously
3021 * recorded the link speed from SStatus, the driver has already
3022 * masked off the highest bit so mask should already be 1 or 0.
3023 * Otherwise, we should not force 1.5Gbps on a link where we have
3024 * not previously recorded speed from SStatus. Just return in this
3028 mask &= (1 << (spd - 1)) - 1;
3032 /* were we already at the bottom? */
3037 if (mask & ((1 << spd_limit) - 1))
3038 mask &= (1 << spd_limit) - 1;
3040 bit = ffs(mask) - 1;
3045 link->sata_spd_limit = mask;
3047 ata_link_warn(link, "limiting SATA link speed to %s\n",
3048 sata_spd_string(fls(mask)));
3053 #ifdef CONFIG_ATA_ACPI
3055 * ata_timing_cycle2mode - find xfer mode for the specified cycle duration
3056 * @xfer_shift: ATA_SHIFT_* value for transfer type to examine.
3057 * @cycle: cycle duration in ns
3059 * Return matching xfer mode for @cycle. The returned mode is of
3060 * the transfer type specified by @xfer_shift. If @cycle is too
3061 * slow for @xfer_shift, 0xff is returned. If @cycle is faster
3062 * than the fastest known mode, the fasted mode is returned.
3068 * Matching xfer_mode, 0xff if no match found.
3070 u8 ata_timing_cycle2mode(unsigned int xfer_shift, int cycle)
3072 u8 base_mode = 0xff, last_mode = 0xff;
3073 const struct ata_xfer_ent *ent;
3074 const struct ata_timing *t;
3076 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
3077 if (ent->shift == xfer_shift)
3078 base_mode = ent->base;
3080 for (t = ata_timing_find_mode(base_mode);
3081 t && ata_xfer_mode2shift(t->mode) == xfer_shift; t++) {
3082 unsigned short this_cycle;
3084 switch (xfer_shift) {
3086 case ATA_SHIFT_MWDMA:
3087 this_cycle = t->cycle;
3089 case ATA_SHIFT_UDMA:
3090 this_cycle = t->udma;
3096 if (cycle > this_cycle)
3099 last_mode = t->mode;
3107 * ata_down_xfermask_limit - adjust dev xfer masks downward
3108 * @dev: Device to adjust xfer masks
3109 * @sel: ATA_DNXFER_* selector
3111 * Adjust xfer masks of @dev downward. Note that this function
3112 * does not apply the change. Invoking ata_set_mode() afterwards
3113 * will apply the limit.
3116 * Inherited from caller.
3119 * 0 on success, negative errno on failure
3121 int ata_down_xfermask_limit(struct ata_device *dev, unsigned int sel)
3124 unsigned long orig_mask, xfer_mask;
3125 unsigned long pio_mask, mwdma_mask, udma_mask;
3128 quiet = !!(sel & ATA_DNXFER_QUIET);
3129 sel &= ~ATA_DNXFER_QUIET;
3131 xfer_mask = orig_mask = ata_pack_xfermask(dev->pio_mask,
3134 ata_unpack_xfermask(xfer_mask, &pio_mask, &mwdma_mask, &udma_mask);
3137 case ATA_DNXFER_PIO:
3138 highbit = fls(pio_mask) - 1;
3139 pio_mask &= ~(1 << highbit);
3142 case ATA_DNXFER_DMA:
3144 highbit = fls(udma_mask) - 1;
3145 udma_mask &= ~(1 << highbit);
3148 } else if (mwdma_mask) {
3149 highbit = fls(mwdma_mask) - 1;
3150 mwdma_mask &= ~(1 << highbit);
3156 case ATA_DNXFER_40C:
3157 udma_mask &= ATA_UDMA_MASK_40C;
3160 case ATA_DNXFER_FORCE_PIO0:
3163 case ATA_DNXFER_FORCE_PIO:
3172 xfer_mask &= ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask);
3174 if (!(xfer_mask & ATA_MASK_PIO) || xfer_mask == orig_mask)
3178 if (xfer_mask & (ATA_MASK_MWDMA | ATA_MASK_UDMA))
3179 snprintf(buf, sizeof(buf), "%s:%s",
3180 ata_mode_string(xfer_mask),
3181 ata_mode_string(xfer_mask & ATA_MASK_PIO));
3183 snprintf(buf, sizeof(buf), "%s",
3184 ata_mode_string(xfer_mask));
3186 ata_dev_warn(dev, "limiting speed to %s\n", buf);
3189 ata_unpack_xfermask(xfer_mask, &dev->pio_mask, &dev->mwdma_mask,
3195 static int ata_dev_set_mode(struct ata_device *dev)
3197 struct ata_port *ap = dev->link->ap;
3198 struct ata_eh_context *ehc = &dev->link->eh_context;
3199 const bool nosetxfer = dev->horkage & ATA_HORKAGE_NOSETXFER;
3200 const char *dev_err_whine = "";
3201 int ign_dev_err = 0;
3202 unsigned int err_mask = 0;
3205 dev->flags &= ~ATA_DFLAG_PIO;
3206 if (dev->xfer_shift == ATA_SHIFT_PIO)
3207 dev->flags |= ATA_DFLAG_PIO;
3209 if (nosetxfer && ap->flags & ATA_FLAG_SATA && ata_id_is_sata(dev->id))
3210 dev_err_whine = " (SET_XFERMODE skipped)";
3214 "NOSETXFER but PATA detected - can't "
3215 "skip SETXFER, might malfunction\n");
3216 err_mask = ata_dev_set_xfermode(dev);
3219 if (err_mask & ~AC_ERR_DEV)
3223 ehc->i.flags |= ATA_EHI_POST_SETMODE;
3224 rc = ata_dev_revalidate(dev, ATA_DEV_UNKNOWN, 0);
3225 ehc->i.flags &= ~ATA_EHI_POST_SETMODE;
3229 if (dev->xfer_shift == ATA_SHIFT_PIO) {
3230 /* Old CFA may refuse this command, which is just fine */
3231 if (ata_id_is_cfa(dev->id))
3233 /* Catch several broken garbage emulations plus some pre
3235 if (ata_id_major_version(dev->id) == 0 &&
3236 dev->pio_mode <= XFER_PIO_2)
3238 /* Some very old devices and some bad newer ones fail
3239 any kind of SET_XFERMODE request but support PIO0-2
3240 timings and no IORDY */
3241 if (!ata_id_has_iordy(dev->id) && dev->pio_mode <= XFER_PIO_2)
3244 /* Early MWDMA devices do DMA but don't allow DMA mode setting.
3245 Don't fail an MWDMA0 set IFF the device indicates it is in MWDMA0 */
3246 if (dev->xfer_shift == ATA_SHIFT_MWDMA &&
3247 dev->dma_mode == XFER_MW_DMA_0 &&
3248 (dev->id[63] >> 8) & 1)
3251 /* if the device is actually configured correctly, ignore dev err */
3252 if (dev->xfer_mode == ata_xfer_mask2mode(ata_id_xfermask(dev->id)))
3255 if (err_mask & AC_ERR_DEV) {
3259 dev_err_whine = " (device error ignored)";
3262 DPRINTK("xfer_shift=%u, xfer_mode=0x%x\n",
3263 dev->xfer_shift, (int)dev->xfer_mode);
3265 if (!(ehc->i.flags & ATA_EHI_QUIET) ||
3266 ehc->i.flags & ATA_EHI_DID_HARDRESET)
3267 ata_dev_info(dev, "configured for %s%s\n",
3268 ata_mode_string(ata_xfer_mode2mask(dev->xfer_mode)),
3274 ata_dev_err(dev, "failed to set xfermode (err_mask=0x%x)\n", err_mask);
3279 * ata_do_set_mode - Program timings and issue SET FEATURES - XFER
3280 * @link: link on which timings will be programmed
3281 * @r_failed_dev: out parameter for failed device
3283 * Standard implementation of the function used to tune and set
3284 * ATA device disk transfer mode (PIO3, UDMA6, etc.). If
3285 * ata_dev_set_mode() fails, pointer to the failing device is
3286 * returned in @r_failed_dev.
3289 * PCI/etc. bus probe sem.
3292 * 0 on success, negative errno otherwise
3295 int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev)
3297 struct ata_port *ap = link->ap;
3298 struct ata_device *dev;
3299 int rc = 0, used_dma = 0, found = 0;
3301 /* step 1: calculate xfer_mask */
3302 ata_for_each_dev(dev, link, ENABLED) {
3303 unsigned long pio_mask, dma_mask;
3304 unsigned int mode_mask;
3306 mode_mask = ATA_DMA_MASK_ATA;
3307 if (dev->class == ATA_DEV_ATAPI)
3308 mode_mask = ATA_DMA_MASK_ATAPI;
3309 else if (ata_id_is_cfa(dev->id))
3310 mode_mask = ATA_DMA_MASK_CFA;
3312 ata_dev_xfermask(dev);
3313 ata_force_xfermask(dev);
3315 pio_mask = ata_pack_xfermask(dev->pio_mask, 0, 0);
3317 if (libata_dma_mask & mode_mask)
3318 dma_mask = ata_pack_xfermask(0, dev->mwdma_mask,
3323 dev->pio_mode = ata_xfer_mask2mode(pio_mask);
3324 dev->dma_mode = ata_xfer_mask2mode(dma_mask);
3327 if (ata_dma_enabled(dev))
3333 /* step 2: always set host PIO timings */
3334 ata_for_each_dev(dev, link, ENABLED) {
3335 if (dev->pio_mode == 0xff) {
3336 ata_dev_warn(dev, "no PIO support\n");
3341 dev->xfer_mode = dev->pio_mode;
3342 dev->xfer_shift = ATA_SHIFT_PIO;
3343 if (ap->ops->set_piomode)
3344 ap->ops->set_piomode(ap, dev);
3347 /* step 3: set host DMA timings */
3348 ata_for_each_dev(dev, link, ENABLED) {
3349 if (!ata_dma_enabled(dev))
3352 dev->xfer_mode = dev->dma_mode;
3353 dev->xfer_shift = ata_xfer_mode2shift(dev->dma_mode);
3354 if (ap->ops->set_dmamode)
3355 ap->ops->set_dmamode(ap, dev);
3358 /* step 4: update devices' xfer mode */
3359 ata_for_each_dev(dev, link, ENABLED) {
3360 rc = ata_dev_set_mode(dev);
3365 /* Record simplex status. If we selected DMA then the other
3366 * host channels are not permitted to do so.
3368 if (used_dma && (ap->host->flags & ATA_HOST_SIMPLEX))
3369 ap->host->simplex_claimed = ap;
3373 *r_failed_dev = dev;
3376 EXPORT_SYMBOL_GPL(ata_do_set_mode);
3379 * ata_wait_ready - wait for link to become ready
3380 * @link: link to be waited on
3381 * @deadline: deadline jiffies for the operation
3382 * @check_ready: callback to check link readiness
3384 * Wait for @link to become ready. @check_ready should return
3385 * positive number if @link is ready, 0 if it isn't, -ENODEV if
3386 * link doesn't seem to be occupied, other errno for other error
3389 * Transient -ENODEV conditions are allowed for
3390 * ATA_TMOUT_FF_WAIT.
3396 * 0 if @link is ready before @deadline; otherwise, -errno.
3398 int ata_wait_ready(struct ata_link *link, unsigned long deadline,
3399 int (*check_ready)(struct ata_link *link))
3401 unsigned long start = jiffies;
3402 unsigned long nodev_deadline;
3405 /* choose which 0xff timeout to use, read comment in libata.h */
3406 if (link->ap->host->flags & ATA_HOST_PARALLEL_SCAN)
3407 nodev_deadline = ata_deadline(start, ATA_TMOUT_FF_WAIT_LONG);
3409 nodev_deadline = ata_deadline(start, ATA_TMOUT_FF_WAIT);
3411 /* Slave readiness can't be tested separately from master. On
3412 * M/S emulation configuration, this function should be called
3413 * only on the master and it will handle both master and slave.
3415 WARN_ON(link == link->ap->slave_link);
3417 if (time_after(nodev_deadline, deadline))
3418 nodev_deadline = deadline;
3421 unsigned long now = jiffies;
3424 ready = tmp = check_ready(link);
3429 * -ENODEV could be transient. Ignore -ENODEV if link
3430 * is online. Also, some SATA devices take a long
3431 * time to clear 0xff after reset. Wait for
3432 * ATA_TMOUT_FF_WAIT[_LONG] on -ENODEV if link isn't
3435 * Note that some PATA controllers (pata_ali) explode
3436 * if status register is read more than once when
3437 * there's no device attached.
3439 if (ready == -ENODEV) {
3440 if (ata_link_online(link))
3442 else if ((link->ap->flags & ATA_FLAG_SATA) &&
3443 !ata_link_offline(link) &&
3444 time_before(now, nodev_deadline))
3450 if (time_after(now, deadline))
3453 if (!warned && time_after(now, start + 5 * HZ) &&
3454 (deadline - now > 3 * HZ)) {
3456 "link is slow to respond, please be patient "
3457 "(ready=%d)\n", tmp);
3461 ata_msleep(link->ap, 50);
3466 * ata_wait_after_reset - wait for link to become ready after reset
3467 * @link: link to be waited on
3468 * @deadline: deadline jiffies for the operation
3469 * @check_ready: callback to check link readiness
3471 * Wait for @link to become ready after reset.
3477 * 0 if @link is ready before @deadline; otherwise, -errno.
3479 int ata_wait_after_reset(struct ata_link *link, unsigned long deadline,
3480 int (*check_ready)(struct ata_link *link))
3482 ata_msleep(link->ap, ATA_WAIT_AFTER_RESET);
3484 return ata_wait_ready(link, deadline, check_ready);
3486 EXPORT_SYMBOL_GPL(ata_wait_after_reset);
3489 * ata_std_prereset - prepare for reset
3490 * @link: ATA link to be reset
3491 * @deadline: deadline jiffies for the operation
3493 * @link is about to be reset. Initialize it. Failure from
3494 * prereset makes libata abort whole reset sequence and give up
3495 * that port, so prereset should be best-effort. It does its
3496 * best to prepare for reset sequence but if things go wrong, it
3497 * should just whine, not fail.
3500 * Kernel thread context (may sleep)
3503 * 0 on success, -errno otherwise.
3505 int ata_std_prereset(struct ata_link *link, unsigned long deadline)
3507 struct ata_port *ap = link->ap;
3508 struct ata_eh_context *ehc = &link->eh_context;
3509 const unsigned long *timing = sata_ehc_deb_timing(ehc);
3512 /* if we're about to do hardreset, nothing more to do */
3513 if (ehc->i.action & ATA_EH_HARDRESET)
3516 /* if SATA, resume link */
3517 if (ap->flags & ATA_FLAG_SATA) {
3518 rc = sata_link_resume(link, timing, deadline);
3519 /* whine about phy resume failure but proceed */
3520 if (rc && rc != -EOPNOTSUPP)
3522 "failed to resume link for reset (errno=%d)\n",
3526 /* no point in trying softreset on offline link */
3527 if (ata_phys_link_offline(link))
3528 ehc->i.action &= ~ATA_EH_SOFTRESET;
3532 EXPORT_SYMBOL_GPL(ata_std_prereset);
3535 * sata_std_hardreset - COMRESET w/o waiting or classification
3536 * @link: link to reset
3537 * @class: resulting class of attached device
3538 * @deadline: deadline jiffies for the operation
3540 * Standard SATA COMRESET w/o waiting or classification.
3543 * Kernel thread context (may sleep)
3546 * 0 if link offline, -EAGAIN if link online, -errno on errors.
3548 int sata_std_hardreset(struct ata_link *link, unsigned int *class,
3549 unsigned long deadline)
3551 const unsigned long *timing = sata_ehc_deb_timing(&link->eh_context);
3556 rc = sata_link_hardreset(link, timing, deadline, &online, NULL);
3557 return online ? -EAGAIN : rc;
3559 EXPORT_SYMBOL_GPL(sata_std_hardreset);
3562 * ata_std_postreset - standard postreset callback
3563 * @link: the target ata_link
3564 * @classes: classes of attached devices
3566 * This function is invoked after a successful reset. Note that
3567 * the device might have been reset more than once using
3568 * different reset methods before postreset is invoked.
3571 * Kernel thread context (may sleep)
3573 void ata_std_postreset(struct ata_link *link, unsigned int *classes)
3579 /* reset complete, clear SError */
3580 if (!sata_scr_read(link, SCR_ERROR, &serror))
3581 sata_scr_write(link, SCR_ERROR, serror);
3583 /* print link status */
3584 sata_print_link_status(link);
3588 EXPORT_SYMBOL_GPL(ata_std_postreset);
3591 * ata_dev_same_device - Determine whether new ID matches configured device
3592 * @dev: device to compare against
3593 * @new_class: class of the new device
3594 * @new_id: IDENTIFY page of the new device
3596 * Compare @new_class and @new_id against @dev and determine
3597 * whether @dev is the device indicated by @new_class and
3604 * 1 if @dev matches @new_class and @new_id, 0 otherwise.
3606 static int ata_dev_same_device(struct ata_device *dev, unsigned int new_class,
3609 const u16 *old_id = dev->id;
3610 unsigned char model[2][ATA_ID_PROD_LEN + 1];
3611 unsigned char serial[2][ATA_ID_SERNO_LEN + 1];
3613 if (dev->class != new_class) {
3614 ata_dev_info(dev, "class mismatch %d != %d\n",
3615 dev->class, new_class);
3619 ata_id_c_string(old_id, model[0], ATA_ID_PROD, sizeof(model[0]));
3620 ata_id_c_string(new_id, model[1], ATA_ID_PROD, sizeof(model[1]));
3621 ata_id_c_string(old_id, serial[0], ATA_ID_SERNO, sizeof(serial[0]));
3622 ata_id_c_string(new_id, serial[1], ATA_ID_SERNO, sizeof(serial[1]));
3624 if (strcmp(model[0], model[1])) {
3625 ata_dev_info(dev, "model number mismatch '%s' != '%s'\n",
3626 model[0], model[1]);
3630 if (strcmp(serial[0], serial[1])) {
3631 ata_dev_info(dev, "serial number mismatch '%s' != '%s'\n",
3632 serial[0], serial[1]);
3640 * ata_dev_reread_id - Re-read IDENTIFY data
3641 * @dev: target ATA device
3642 * @readid_flags: read ID flags
3644 * Re-read IDENTIFY page and make sure @dev is still attached to
3648 * Kernel thread context (may sleep)
3651 * 0 on success, negative errno otherwise
3653 int ata_dev_reread_id(struct ata_device *dev, unsigned int readid_flags)
3655 unsigned int class = dev->class;
3656 u16 *id = (void *)dev->link->ap->sector_buf;
3660 rc = ata_dev_read_id(dev, &class, readid_flags, id);
3664 /* is the device still there? */
3665 if (!ata_dev_same_device(dev, class, id))
3668 memcpy(dev->id, id, sizeof(id[0]) * ATA_ID_WORDS);
3673 * ata_dev_revalidate - Revalidate ATA device
3674 * @dev: device to revalidate
3675 * @new_class: new class code
3676 * @readid_flags: read ID flags
3678 * Re-read IDENTIFY page, make sure @dev is still attached to the
3679 * port and reconfigure it according to the new IDENTIFY page.
3682 * Kernel thread context (may sleep)
3685 * 0 on success, negative errno otherwise
3687 int ata_dev_revalidate(struct ata_device *dev, unsigned int new_class,
3688 unsigned int readid_flags)
3690 u64 n_sectors = dev->n_sectors;
3691 u64 n_native_sectors = dev->n_native_sectors;
3694 if (!ata_dev_enabled(dev))
3697 /* fail early if !ATA && !ATAPI to avoid issuing [P]IDENTIFY to PMP */
3698 if (ata_class_enabled(new_class) &&
3699 new_class != ATA_DEV_ATA &&
3700 new_class != ATA_DEV_ATAPI &&
3701 new_class != ATA_DEV_ZAC &&
3702 new_class != ATA_DEV_SEMB) {
3703 ata_dev_info(dev, "class mismatch %u != %u\n",
3704 dev->class, new_class);
3710 rc = ata_dev_reread_id(dev, readid_flags);
3714 /* configure device according to the new ID */
3715 rc = ata_dev_configure(dev);
3719 /* verify n_sectors hasn't changed */
3720 if (dev->class != ATA_DEV_ATA || !n_sectors ||
3721 dev->n_sectors == n_sectors)
3724 /* n_sectors has changed */
3725 ata_dev_warn(dev, "n_sectors mismatch %llu != %llu\n",
3726 (unsigned long long)n_sectors,
3727 (unsigned long long)dev->n_sectors);
3730 * Something could have caused HPA to be unlocked
3731 * involuntarily. If n_native_sectors hasn't changed and the
3732 * new size matches it, keep the device.
3734 if (dev->n_native_sectors == n_native_sectors &&
3735 dev->n_sectors > n_sectors && dev->n_sectors == n_native_sectors) {
3737 "new n_sectors matches native, probably "
3738 "late HPA unlock, n_sectors updated\n");
3739 /* use the larger n_sectors */
3744 * Some BIOSes boot w/o HPA but resume w/ HPA locked. Try
3745 * unlocking HPA in those cases.
3747 * https://bugzilla.kernel.org/show_bug.cgi?id=15396
3749 if (dev->n_native_sectors == n_native_sectors &&
3750 dev->n_sectors < n_sectors && n_sectors == n_native_sectors &&
3751 !(dev->horkage & ATA_HORKAGE_BROKEN_HPA)) {
3753 "old n_sectors matches native, probably "
3754 "late HPA lock, will try to unlock HPA\n");
3755 /* try unlocking HPA */
3756 dev->flags |= ATA_DFLAG_UNLOCK_HPA;
3761 /* restore original n_[native_]sectors and fail */
3762 dev->n_native_sectors = n_native_sectors;
3763 dev->n_sectors = n_sectors;
3765 ata_dev_err(dev, "revalidation failed (errno=%d)\n", rc);
3769 struct ata_blacklist_entry {
3770 const char *model_num;
3771 const char *model_rev;
3772 unsigned long horkage;
3775 static const struct ata_blacklist_entry ata_device_blacklist [] = {
3776 /* Devices with DMA related problems under Linux */
3777 { "WDC AC11000H", NULL, ATA_HORKAGE_NODMA },
3778 { "WDC AC22100H", NULL, ATA_HORKAGE_NODMA },
3779 { "WDC AC32500H", NULL, ATA_HORKAGE_NODMA },
3780 { "WDC AC33100H", NULL, ATA_HORKAGE_NODMA },
3781 { "WDC AC31600H", NULL, ATA_HORKAGE_NODMA },
3782 { "WDC AC32100H", "24.09P07", ATA_HORKAGE_NODMA },
3783 { "WDC AC23200L", "21.10N21", ATA_HORKAGE_NODMA },
3784 { "Compaq CRD-8241B", NULL, ATA_HORKAGE_NODMA },
3785 { "CRD-8400B", NULL, ATA_HORKAGE_NODMA },
3786 { "CRD-848[02]B", NULL, ATA_HORKAGE_NODMA },
3787 { "CRD-84", NULL, ATA_HORKAGE_NODMA },
3788 { "SanDisk SDP3B", NULL, ATA_HORKAGE_NODMA },
3789 { "SanDisk SDP3B-64", NULL, ATA_HORKAGE_NODMA },
3790 { "SANYO CD-ROM CRD", NULL, ATA_HORKAGE_NODMA },
3791 { "HITACHI CDR-8", NULL, ATA_HORKAGE_NODMA },
3792 { "HITACHI CDR-8[34]35",NULL, ATA_HORKAGE_NODMA },
3793 { "Toshiba CD-ROM XM-6202B", NULL, ATA_HORKAGE_NODMA },
3794 { "TOSHIBA CD-ROM XM-1702BC", NULL, ATA_HORKAGE_NODMA },
3795 { "CD-532E-A", NULL, ATA_HORKAGE_NODMA },
3796 { "E-IDE CD-ROM CR-840",NULL, ATA_HORKAGE_NODMA },
3797 { "CD-ROM Drive/F5A", NULL, ATA_HORKAGE_NODMA },
3798 { "WPI CDD-820", NULL, ATA_HORKAGE_NODMA },
3799 { "SAMSUNG CD-ROM SC-148C", NULL, ATA_HORKAGE_NODMA },
3800 { "SAMSUNG CD-ROM SC", NULL, ATA_HORKAGE_NODMA },
3801 { "ATAPI CD-ROM DRIVE 40X MAXIMUM",NULL,ATA_HORKAGE_NODMA },
3802 { "_NEC DV5800A", NULL, ATA_HORKAGE_NODMA },
3803 { "SAMSUNG CD-ROM SN-124", "N001", ATA_HORKAGE_NODMA },
3804 { "Seagate STT20000A", NULL, ATA_HORKAGE_NODMA },
3805 { " 2GB ATA Flash Disk", "ADMA428M", ATA_HORKAGE_NODMA },
3806 { "VRFDFC22048UCHC-TE*", NULL, ATA_HORKAGE_NODMA },
3807 /* Odd clown on sil3726/4726 PMPs */
3808 { "Config Disk", NULL, ATA_HORKAGE_DISABLE },
3810 /* Weird ATAPI devices */
3811 { "TORiSAN DVD-ROM DRD-N216", NULL, ATA_HORKAGE_MAX_SEC_128 },
3812 { "QUANTUM DAT DAT72-000", NULL, ATA_HORKAGE_ATAPI_MOD16_DMA },
3813 { "Slimtype DVD A DS8A8SH", NULL, ATA_HORKAGE_MAX_SEC_LBA48 },
3814 { "Slimtype DVD A DS8A9SH", NULL, ATA_HORKAGE_MAX_SEC_LBA48 },
3817 * Causes silent data corruption with higher max sects.
3818 * http://lkml.kernel.org/g/x49wpy40ysk.fsf@segfault.boston.devel.redhat.com
3820 { "ST380013AS", "3.20", ATA_HORKAGE_MAX_SEC_1024 },
3823 * These devices time out with higher max sects.
3824 * https://bugzilla.kernel.org/show_bug.cgi?id=121671
3826 { "LITEON CX1-JB*-HP", NULL, ATA_HORKAGE_MAX_SEC_1024 },
3827 { "LITEON EP1-*", NULL, ATA_HORKAGE_MAX_SEC_1024 },
3829 /* Devices we expect to fail diagnostics */
3831 /* Devices where NCQ should be avoided */
3833 { "WDC WD740ADFD-00", NULL, ATA_HORKAGE_NONCQ },
3834 { "WDC WD740ADFD-00NLR1", NULL, ATA_HORKAGE_NONCQ, },
3835 /* http://thread.gmane.org/gmane.linux.ide/14907 */
3836 { "FUJITSU MHT2060BH", NULL, ATA_HORKAGE_NONCQ },
3838 { "Maxtor *", "BANC*", ATA_HORKAGE_NONCQ },
3839 { "Maxtor 7V300F0", "VA111630", ATA_HORKAGE_NONCQ },
3840 { "ST380817AS", "3.42", ATA_HORKAGE_NONCQ },
3841 { "ST3160023AS", "3.42", ATA_HORKAGE_NONCQ },
3842 { "OCZ CORE_SSD", "02.10104", ATA_HORKAGE_NONCQ },
3844 /* Seagate NCQ + FLUSH CACHE firmware bug */
3845 { "ST31500341AS", "SD1[5-9]", ATA_HORKAGE_NONCQ |
3846 ATA_HORKAGE_FIRMWARE_WARN },
3848 { "ST31000333AS", "SD1[5-9]", ATA_HORKAGE_NONCQ |
3849 ATA_HORKAGE_FIRMWARE_WARN },
3851 { "ST3640[36]23AS", "SD1[5-9]", ATA_HORKAGE_NONCQ |
3852 ATA_HORKAGE_FIRMWARE_WARN },
3854 { "ST3320[68]13AS", "SD1[5-9]", ATA_HORKAGE_NONCQ |
3855 ATA_HORKAGE_FIRMWARE_WARN },
3857 /* drives which fail FPDMA_AA activation (some may freeze afterwards)
3858 the ST disks also have LPM issues */
3859 { "ST1000LM024 HN-M101MBB", NULL, ATA_HORKAGE_BROKEN_FPDMA_AA |
3860 ATA_HORKAGE_NOLPM, },
3861 { "VB0250EAVER", "HPG7", ATA_HORKAGE_BROKEN_FPDMA_AA },
3863 /* Blacklist entries taken from Silicon Image 3124/3132
3864 Windows driver .inf file - also several Linux problem reports */
3865 { "HTS541060G9SA00", "MB3OC60D", ATA_HORKAGE_NONCQ, },
3866 { "HTS541080G9SA00", "MB4OC60D", ATA_HORKAGE_NONCQ, },
3867 { "HTS541010G9SA00", "MBZOC60D", ATA_HORKAGE_NONCQ, },
3869 /* https://bugzilla.kernel.org/show_bug.cgi?id=15573 */
3870 { "C300-CTFDDAC128MAG", "0001", ATA_HORKAGE_NONCQ, },
3872 /* Some Sandisk SSDs lock up hard with NCQ enabled. Reported on
3873 SD7SN6S256G and SD8SN8U256G */
3874 { "SanDisk SD[78]SN*G", NULL, ATA_HORKAGE_NONCQ, },
3876 /* devices which puke on READ_NATIVE_MAX */
3877 { "HDS724040KLSA80", "KFAOA20N", ATA_HORKAGE_BROKEN_HPA, },
3878 { "WDC WD3200JD-00KLB0", "WD-WCAMR1130137", ATA_HORKAGE_BROKEN_HPA },
3879 { "WDC WD2500JD-00HBB0", "WD-WMAL71490727", ATA_HORKAGE_BROKEN_HPA },
3880 { "MAXTOR 6L080L4", "A93.0500", ATA_HORKAGE_BROKEN_HPA },
3882 /* this one allows HPA unlocking but fails IOs on the area */
3883 { "OCZ-VERTEX", "1.30", ATA_HORKAGE_BROKEN_HPA },
3885 /* Devices which report 1 sector over size HPA */
3886 { "ST340823A", NULL, ATA_HORKAGE_HPA_SIZE, },
3887 { "ST320413A", NULL, ATA_HORKAGE_HPA_SIZE, },
3888 { "ST310211A", NULL, ATA_HORKAGE_HPA_SIZE, },
3890 /* Devices which get the IVB wrong */
3891 { "QUANTUM FIREBALLlct10 05", "A03.0900", ATA_HORKAGE_IVB, },
3892 /* Maybe we should just blacklist TSSTcorp... */
3893 { "TSSTcorp CDDVDW SH-S202[HJN]", "SB0[01]", ATA_HORKAGE_IVB, },
3895 /* Devices that do not need bridging limits applied */
3896 { "MTRON MSP-SATA*", NULL, ATA_HORKAGE_BRIDGE_OK, },
3897 { "BUFFALO HD-QSU2/R5", NULL, ATA_HORKAGE_BRIDGE_OK, },
3899 /* Devices which aren't very happy with higher link speeds */
3900 { "WD My Book", NULL, ATA_HORKAGE_1_5_GBPS, },
3901 { "Seagate FreeAgent GoFlex", NULL, ATA_HORKAGE_1_5_GBPS, },
3904 * Devices which choke on SETXFER. Applies only if both the
3905 * device and controller are SATA.
3907 { "PIONEER DVD-RW DVRTD08", NULL, ATA_HORKAGE_NOSETXFER },
3908 { "PIONEER DVD-RW DVRTD08A", NULL, ATA_HORKAGE_NOSETXFER },
3909 { "PIONEER DVD-RW DVR-215", NULL, ATA_HORKAGE_NOSETXFER },
3910 { "PIONEER DVD-RW DVR-212D", NULL, ATA_HORKAGE_NOSETXFER },
3911 { "PIONEER DVD-RW DVR-216D", NULL, ATA_HORKAGE_NOSETXFER },
3913 /* Crucial BX100 SSD 500GB has broken LPM support */
3914 { "CT500BX100SSD1", NULL, ATA_HORKAGE_NOLPM },
3916 /* 512GB MX100 with MU01 firmware has both queued TRIM and LPM issues */
3917 { "Crucial_CT512MX100*", "MU01", ATA_HORKAGE_NO_NCQ_TRIM |
3918 ATA_HORKAGE_ZERO_AFTER_TRIM |
3919 ATA_HORKAGE_NOLPM, },
3920 /* 512GB MX100 with newer firmware has only LPM issues */
3921 { "Crucial_CT512MX100*", NULL, ATA_HORKAGE_ZERO_AFTER_TRIM |
3922 ATA_HORKAGE_NOLPM, },
3924 /* 480GB+ M500 SSDs have both queued TRIM and LPM issues */
3925 { "Crucial_CT480M500*", NULL, ATA_HORKAGE_NO_NCQ_TRIM |
3926 ATA_HORKAGE_ZERO_AFTER_TRIM |
3927 ATA_HORKAGE_NOLPM, },
3928 { "Crucial_CT960M500*", NULL, ATA_HORKAGE_NO_NCQ_TRIM |
3929 ATA_HORKAGE_ZERO_AFTER_TRIM |
3930 ATA_HORKAGE_NOLPM, },
3932 /* These specific Samsung models/firmware-revs do not handle LPM well */
3933 { "SAMSUNG MZMPC128HBFU-000MV", "CXM14M1Q", ATA_HORKAGE_NOLPM, },
3934 { "SAMSUNG SSD PM830 mSATA *", "CXM13D1Q", ATA_HORKAGE_NOLPM, },
3935 { "SAMSUNG MZ7TD256HAFV-000L9", NULL, ATA_HORKAGE_NOLPM, },
3936 { "SAMSUNG MZ7TE512HMHP-000L1", "EXT06L0Q", ATA_HORKAGE_NOLPM, },
3938 /* devices that don't properly handle queued TRIM commands */
3939 { "Micron_M500IT_*", "MU01", ATA_HORKAGE_NO_NCQ_TRIM |
3940 ATA_HORKAGE_ZERO_AFTER_TRIM, },
3941 { "Micron_M500_*", NULL, ATA_HORKAGE_NO_NCQ_TRIM |
3942 ATA_HORKAGE_ZERO_AFTER_TRIM, },
3943 { "Crucial_CT*M500*", NULL, ATA_HORKAGE_NO_NCQ_TRIM |
3944 ATA_HORKAGE_ZERO_AFTER_TRIM, },
3945 { "Micron_M5[15]0_*", "MU01", ATA_HORKAGE_NO_NCQ_TRIM |
3946 ATA_HORKAGE_ZERO_AFTER_TRIM, },
3947 { "Crucial_CT*M550*", "MU01", ATA_HORKAGE_NO_NCQ_TRIM |
3948 ATA_HORKAGE_ZERO_AFTER_TRIM, },
3949 { "Crucial_CT*MX100*", "MU01", ATA_HORKAGE_NO_NCQ_TRIM |
3950 ATA_HORKAGE_ZERO_AFTER_TRIM, },
3951 { "Samsung SSD 840*", NULL, ATA_HORKAGE_NO_NCQ_TRIM |
3952 ATA_HORKAGE_ZERO_AFTER_TRIM, },
3953 { "Samsung SSD 850*", NULL, ATA_HORKAGE_NO_NCQ_TRIM |
3954 ATA_HORKAGE_ZERO_AFTER_TRIM, },
3955 { "FCCT*M500*", NULL, ATA_HORKAGE_NO_NCQ_TRIM |
3956 ATA_HORKAGE_ZERO_AFTER_TRIM, },
3958 /* devices that don't properly handle TRIM commands */
3959 { "SuperSSpeed S238*", NULL, ATA_HORKAGE_NOTRIM, },
3962 * As defined, the DRAT (Deterministic Read After Trim) and RZAT
3963 * (Return Zero After Trim) flags in the ATA Command Set are
3964 * unreliable in the sense that they only define what happens if
3965 * the device successfully executed the DSM TRIM command. TRIM
3966 * is only advisory, however, and the device is free to silently
3967 * ignore all or parts of the request.
3969 * Whitelist drives that are known to reliably return zeroes
3974 * The intel 510 drive has buggy DRAT/RZAT. Explicitly exclude
3975 * that model before whitelisting all other intel SSDs.
3977 { "INTEL*SSDSC2MH*", NULL, 0, },
3979 { "Micron*", NULL, ATA_HORKAGE_ZERO_AFTER_TRIM, },
3980 { "Crucial*", NULL, ATA_HORKAGE_ZERO_AFTER_TRIM, },
3981 { "INTEL*SSD*", NULL, ATA_HORKAGE_ZERO_AFTER_TRIM, },
3982 { "SSD*INTEL*", NULL, ATA_HORKAGE_ZERO_AFTER_TRIM, },
3983 { "Samsung*SSD*", NULL, ATA_HORKAGE_ZERO_AFTER_TRIM, },
3984 { "SAMSUNG*SSD*", NULL, ATA_HORKAGE_ZERO_AFTER_TRIM, },
3985 { "SAMSUNG*MZ7KM*", NULL, ATA_HORKAGE_ZERO_AFTER_TRIM, },
3986 { "ST[1248][0248]0[FH]*", NULL, ATA_HORKAGE_ZERO_AFTER_TRIM, },
3989 * Some WD SATA-I drives spin up and down erratically when the link
3990 * is put into the slumber mode. We don't have full list of the
3991 * affected devices. Disable LPM if the device matches one of the
3992 * known prefixes and is SATA-1. As a side effect LPM partial is
3995 * https://bugzilla.kernel.org/show_bug.cgi?id=57211
3997 { "WDC WD800JD-*", NULL, ATA_HORKAGE_WD_BROKEN_LPM },
3998 { "WDC WD1200JD-*", NULL, ATA_HORKAGE_WD_BROKEN_LPM },
3999 { "WDC WD1600JD-*", NULL, ATA_HORKAGE_WD_BROKEN_LPM },
4000 { "WDC WD2000JD-*", NULL, ATA_HORKAGE_WD_BROKEN_LPM },
4001 { "WDC WD2500JD-*", NULL, ATA_HORKAGE_WD_BROKEN_LPM },
4002 { "WDC WD3000JD-*", NULL, ATA_HORKAGE_WD_BROKEN_LPM },
4003 { "WDC WD3200JD-*", NULL, ATA_HORKAGE_WD_BROKEN_LPM },
4009 static unsigned long ata_dev_blacklisted(const struct ata_device *dev)
4011 unsigned char model_num[ATA_ID_PROD_LEN + 1];
4012 unsigned char model_rev[ATA_ID_FW_REV_LEN + 1];
4013 const struct ata_blacklist_entry *ad = ata_device_blacklist;
4015 ata_id_c_string(dev->id, model_num, ATA_ID_PROD, sizeof(model_num));
4016 ata_id_c_string(dev->id, model_rev, ATA_ID_FW_REV, sizeof(model_rev));
4018 while (ad->model_num) {
4019 if (glob_match(ad->model_num, model_num)) {
4020 if (ad->model_rev == NULL)
4022 if (glob_match(ad->model_rev, model_rev))
4030 static int ata_dma_blacklisted(const struct ata_device *dev)
4032 /* We don't support polling DMA.
4033 * DMA blacklist those ATAPI devices with CDB-intr (and use PIO)
4034 * if the LLDD handles only interrupts in the HSM_ST_LAST state.
4036 if ((dev->link->ap->flags & ATA_FLAG_PIO_POLLING) &&
4037 (dev->flags & ATA_DFLAG_CDB_INTR))
4039 return (dev->horkage & ATA_HORKAGE_NODMA) ? 1 : 0;
4043 * ata_is_40wire - check drive side detection
4046 * Perform drive side detection decoding, allowing for device vendors
4047 * who can't follow the documentation.
4050 static int ata_is_40wire(struct ata_device *dev)
4052 if (dev->horkage & ATA_HORKAGE_IVB)
4053 return ata_drive_40wire_relaxed(dev->id);
4054 return ata_drive_40wire(dev->id);
4058 * cable_is_40wire - 40/80/SATA decider
4059 * @ap: port to consider
4061 * This function encapsulates the policy for speed management
4062 * in one place. At the moment we don't cache the result but
4063 * there is a good case for setting ap->cbl to the result when
4064 * we are called with unknown cables (and figuring out if it
4065 * impacts hotplug at all).
4067 * Return 1 if the cable appears to be 40 wire.
4070 static int cable_is_40wire(struct ata_port *ap)
4072 struct ata_link *link;
4073 struct ata_device *dev;
4075 /* If the controller thinks we are 40 wire, we are. */
4076 if (ap->cbl == ATA_CBL_PATA40)
4079 /* If the controller thinks we are 80 wire, we are. */
4080 if (ap->cbl == ATA_CBL_PATA80 || ap->cbl == ATA_CBL_SATA)
4083 /* If the system is known to be 40 wire short cable (eg
4084 * laptop), then we allow 80 wire modes even if the drive
4087 if (ap->cbl == ATA_CBL_PATA40_SHORT)
4090 /* If the controller doesn't know, we scan.
4092 * Note: We look for all 40 wire detects at this point. Any
4093 * 80 wire detect is taken to be 80 wire cable because
4094 * - in many setups only the one drive (slave if present) will
4095 * give a valid detect
4096 * - if you have a non detect capable drive you don't want it
4097 * to colour the choice
4099 ata_for_each_link(link, ap, EDGE) {
4100 ata_for_each_dev(dev, link, ENABLED) {
4101 if (!ata_is_40wire(dev))
4109 * ata_dev_xfermask - Compute supported xfermask of the given device
4110 * @dev: Device to compute xfermask for
4112 * Compute supported xfermask of @dev and store it in
4113 * dev->*_mask. This function is responsible for applying all
4114 * known limits including host controller limits, device
4120 static void ata_dev_xfermask(struct ata_device *dev)
4122 struct ata_link *link = dev->link;
4123 struct ata_port *ap = link->ap;
4124 struct ata_host *host = ap->host;
4125 unsigned long xfer_mask;
4127 /* controller modes available */
4128 xfer_mask = ata_pack_xfermask(ap->pio_mask,
4129 ap->mwdma_mask, ap->udma_mask);
4131 /* drive modes available */
4132 xfer_mask &= ata_pack_xfermask(dev->pio_mask,
4133 dev->mwdma_mask, dev->udma_mask);
4134 xfer_mask &= ata_id_xfermask(dev->id);
4137 * CFA Advanced TrueIDE timings are not allowed on a shared
4140 if (ata_dev_pair(dev)) {
4141 /* No PIO5 or PIO6 */
4142 xfer_mask &= ~(0x03 << (ATA_SHIFT_PIO + 5));
4143 /* No MWDMA3 or MWDMA 4 */
4144 xfer_mask &= ~(0x03 << (ATA_SHIFT_MWDMA + 3));
4147 if (ata_dma_blacklisted(dev)) {
4148 xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA);
4150 "device is on DMA blacklist, disabling DMA\n");
4153 if ((host->flags & ATA_HOST_SIMPLEX) &&
4154 host->simplex_claimed && host->simplex_claimed != ap) {
4155 xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA);
4157 "simplex DMA is claimed by other device, disabling DMA\n");
4160 if (ap->flags & ATA_FLAG_NO_IORDY)
4161 xfer_mask &= ata_pio_mask_no_iordy(dev);
4163 if (ap->ops->mode_filter)
4164 xfer_mask = ap->ops->mode_filter(dev, xfer_mask);
4166 /* Apply cable rule here. Don't apply it early because when
4167 * we handle hot plug the cable type can itself change.
4168 * Check this last so that we know if the transfer rate was
4169 * solely limited by the cable.
4170 * Unknown or 80 wire cables reported host side are checked
4171 * drive side as well. Cases where we know a 40wire cable
4172 * is used safely for 80 are not checked here.
4174 if (xfer_mask & (0xF8 << ATA_SHIFT_UDMA))
4175 /* UDMA/44 or higher would be available */
4176 if (cable_is_40wire(ap)) {
4178 "limited to UDMA/33 due to 40-wire cable\n");
4179 xfer_mask &= ~(0xF8 << ATA_SHIFT_UDMA);
4182 ata_unpack_xfermask(xfer_mask, &dev->pio_mask,
4183 &dev->mwdma_mask, &dev->udma_mask);
4187 * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command
4188 * @dev: Device to which command will be sent
4190 * Issue SET FEATURES - XFER MODE command to device @dev
4194 * PCI/etc. bus probe sem.
4197 * 0 on success, AC_ERR_* mask otherwise.
4200 static unsigned int ata_dev_set_xfermode(struct ata_device *dev)
4202 struct ata_taskfile tf;
4203 unsigned int err_mask;
4205 /* set up set-features taskfile */
4206 DPRINTK("set features - xfer mode\n");
4208 /* Some controllers and ATAPI devices show flaky interrupt
4209 * behavior after setting xfer mode. Use polling instead.
4211 ata_tf_init(dev, &tf);
4212 tf.command = ATA_CMD_SET_FEATURES;
4213 tf.feature = SETFEATURES_XFER;
4214 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_POLLING;
4215 tf.protocol = ATA_PROT_NODATA;
4216 /* If we are using IORDY we must send the mode setting command */
4217 if (ata_pio_need_iordy(dev))
4218 tf.nsect = dev->xfer_mode;
4219 /* If the device has IORDY and the controller does not - turn it off */
4220 else if (ata_id_has_iordy(dev->id))
4222 else /* In the ancient relic department - skip all of this */
4225 /* On some disks, this command causes spin-up, so we need longer timeout */
4226 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 15000);
4228 DPRINTK("EXIT, err_mask=%x\n", err_mask);
4233 * ata_dev_set_feature - Issue SET FEATURES - SATA FEATURES
4234 * @dev: Device to which command will be sent
4235 * @enable: Whether to enable or disable the feature
4236 * @feature: The sector count represents the feature to set
4238 * Issue SET FEATURES - SATA FEATURES command to device @dev
4239 * on port @ap with sector count
4242 * PCI/etc. bus probe sem.
4245 * 0 on success, AC_ERR_* mask otherwise.
4247 unsigned int ata_dev_set_feature(struct ata_device *dev, u8 enable, u8 feature)
4249 struct ata_taskfile tf;
4250 unsigned int err_mask;
4251 unsigned long timeout = 0;
4253 /* set up set-features taskfile */
4254 DPRINTK("set features - SATA features\n");
4256 ata_tf_init(dev, &tf);
4257 tf.command = ATA_CMD_SET_FEATURES;
4258 tf.feature = enable;
4259 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
4260 tf.protocol = ATA_PROT_NODATA;
4263 if (enable == SETFEATURES_SPINUP)
4264 timeout = ata_probe_timeout ?
4265 ata_probe_timeout * 1000 : SETFEATURES_SPINUP_TIMEOUT;
4266 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, timeout);
4268 DPRINTK("EXIT, err_mask=%x\n", err_mask);
4271 EXPORT_SYMBOL_GPL(ata_dev_set_feature);
4274 * ata_dev_init_params - Issue INIT DEV PARAMS command
4275 * @dev: Device to which command will be sent
4276 * @heads: Number of heads (taskfile parameter)
4277 * @sectors: Number of sectors (taskfile parameter)
4280 * Kernel thread context (may sleep)
4283 * 0 on success, AC_ERR_* mask otherwise.
4285 static unsigned int ata_dev_init_params(struct ata_device *dev,
4286 u16 heads, u16 sectors)
4288 struct ata_taskfile tf;
4289 unsigned int err_mask;
4291 /* Number of sectors per track 1-255. Number of heads 1-16 */
4292 if (sectors < 1 || sectors > 255 || heads < 1 || heads > 16)
4293 return AC_ERR_INVALID;
4295 /* set up init dev params taskfile */
4296 DPRINTK("init dev params \n");
4298 ata_tf_init(dev, &tf);
4299 tf.command = ATA_CMD_INIT_DEV_PARAMS;
4300 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
4301 tf.protocol = ATA_PROT_NODATA;
4303 tf.device |= (heads - 1) & 0x0f; /* max head = num. of heads - 1 */
4305 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
4306 /* A clean abort indicates an original or just out of spec drive
4307 and we should continue as we issue the setup based on the
4308 drive reported working geometry */
4309 if (err_mask == AC_ERR_DEV && (tf.feature & ATA_ABORTED))
4312 DPRINTK("EXIT, err_mask=%x\n", err_mask);
4317 * atapi_check_dma - Check whether ATAPI DMA can be supported
4318 * @qc: Metadata associated with taskfile to check
4320 * Allow low-level driver to filter ATA PACKET commands, returning
4321 * a status indicating whether or not it is OK to use DMA for the
4322 * supplied PACKET command.
4325 * spin_lock_irqsave(host lock)
4327 * RETURNS: 0 when ATAPI DMA can be used
4330 int atapi_check_dma(struct ata_queued_cmd *qc)
4332 struct ata_port *ap = qc->ap;
4334 /* Don't allow DMA if it isn't multiple of 16 bytes. Quite a
4335 * few ATAPI devices choke on such DMA requests.
4337 if (!(qc->dev->horkage & ATA_HORKAGE_ATAPI_MOD16_DMA) &&
4338 unlikely(qc->nbytes & 15))
4341 if (ap->ops->check_atapi_dma)
4342 return ap->ops->check_atapi_dma(qc);
4348 * ata_std_qc_defer - Check whether a qc needs to be deferred
4349 * @qc: ATA command in question
4351 * Non-NCQ commands cannot run with any other command, NCQ or
4352 * not. As upper layer only knows the queue depth, we are
4353 * responsible for maintaining exclusion. This function checks
4354 * whether a new command @qc can be issued.
4357 * spin_lock_irqsave(host lock)
4360 * ATA_DEFER_* if deferring is needed, 0 otherwise.
4362 int ata_std_qc_defer(struct ata_queued_cmd *qc)
4364 struct ata_link *link = qc->dev->link;
4366 if (ata_is_ncq(qc->tf.protocol)) {
4367 if (!ata_tag_valid(link->active_tag))
4370 if (!ata_tag_valid(link->active_tag) && !link->sactive)
4374 return ATA_DEFER_LINK;
4376 EXPORT_SYMBOL_GPL(ata_std_qc_defer);
4378 enum ata_completion_errors ata_noop_qc_prep(struct ata_queued_cmd *qc)
4382 EXPORT_SYMBOL_GPL(ata_noop_qc_prep);
4385 * ata_sg_init - Associate command with scatter-gather table.
4386 * @qc: Command to be associated
4387 * @sg: Scatter-gather table.
4388 * @n_elem: Number of elements in s/g table.
4390 * Initialize the data-related elements of queued_cmd @qc
4391 * to point to a scatter-gather table @sg, containing @n_elem
4395 * spin_lock_irqsave(host lock)
4397 void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
4398 unsigned int n_elem)
4401 qc->n_elem = n_elem;
4405 #ifdef CONFIG_HAS_DMA
4408 * ata_sg_clean - Unmap DMA memory associated with command
4409 * @qc: Command containing DMA memory to be released
4411 * Unmap all mapped DMA memory associated with this command.
4414 * spin_lock_irqsave(host lock)
4416 static void ata_sg_clean(struct ata_queued_cmd *qc)
4418 struct ata_port *ap = qc->ap;
4419 struct scatterlist *sg = qc->sg;
4420 int dir = qc->dma_dir;
4422 WARN_ON_ONCE(sg == NULL);
4424 VPRINTK("unmapping %u sg elements\n", qc->n_elem);
4427 dma_unmap_sg(ap->dev, sg, qc->orig_n_elem, dir);
4429 qc->flags &= ~ATA_QCFLAG_DMAMAP;
4434 * ata_sg_setup - DMA-map the scatter-gather table associated with a command.
4435 * @qc: Command with scatter-gather table to be mapped.
4437 * DMA-map the scatter-gather table associated with queued_cmd @qc.
4440 * spin_lock_irqsave(host lock)
4443 * Zero on success, negative on error.
4446 static int ata_sg_setup(struct ata_queued_cmd *qc)
4448 struct ata_port *ap = qc->ap;
4449 unsigned int n_elem;
4451 VPRINTK("ENTER, ata%u\n", ap->print_id);
4453 n_elem = dma_map_sg(ap->dev, qc->sg, qc->n_elem, qc->dma_dir);
4457 VPRINTK("%d sg elements mapped\n", n_elem);
4458 qc->orig_n_elem = qc->n_elem;
4459 qc->n_elem = n_elem;
4460 qc->flags |= ATA_QCFLAG_DMAMAP;
4465 #else /* !CONFIG_HAS_DMA */
4467 static inline void ata_sg_clean(struct ata_queued_cmd *qc) {}
4468 static inline int ata_sg_setup(struct ata_queued_cmd *qc) { return -1; }
4470 #endif /* !CONFIG_HAS_DMA */
4473 * swap_buf_le16 - swap halves of 16-bit words in place
4474 * @buf: Buffer to swap
4475 * @buf_words: Number of 16-bit words in buffer.
4477 * Swap halves of 16-bit words if needed to convert from
4478 * little-endian byte order to native cpu byte order, or
4482 * Inherited from caller.
4484 void swap_buf_le16(u16 *buf, unsigned int buf_words)
4489 for (i = 0; i < buf_words; i++)
4490 buf[i] = le16_to_cpu(buf[i]);
4491 #endif /* __BIG_ENDIAN */
4495 * ata_qc_new_init - Request an available ATA command, and initialize it
4496 * @dev: Device from whom we request an available command structure
4503 struct ata_queued_cmd *ata_qc_new_init(struct ata_device *dev, int tag)
4505 struct ata_port *ap = dev->link->ap;
4506 struct ata_queued_cmd *qc;
4508 /* no command while frozen */
4509 if (unlikely(ap->pflags & ATA_PFLAG_FROZEN))
4513 if (ap->flags & ATA_FLAG_SAS_HOST) {
4514 tag = ata_sas_allocate_tag(ap);
4519 qc = __ata_qc_from_tag(ap, tag);
4520 qc->tag = qc->hw_tag = tag;
4531 * ata_qc_free - free unused ata_queued_cmd
4532 * @qc: Command to complete
4534 * Designed to free unused ata_queued_cmd object
4535 * in case something prevents using it.
4538 * spin_lock_irqsave(host lock)
4540 void ata_qc_free(struct ata_queued_cmd *qc)
4542 struct ata_port *ap;
4545 WARN_ON_ONCE(qc == NULL); /* ata_qc_from_tag _might_ return NULL */
4550 if (ata_tag_valid(tag)) {
4551 qc->tag = ATA_TAG_POISON;
4552 if (ap->flags & ATA_FLAG_SAS_HOST)
4553 ata_sas_free_tag(tag, ap);
4557 void __ata_qc_complete(struct ata_queued_cmd *qc)
4559 struct ata_port *ap;
4560 struct ata_link *link;
4562 WARN_ON_ONCE(qc == NULL); /* ata_qc_from_tag _might_ return NULL */
4563 WARN_ON_ONCE(!(qc->flags & ATA_QCFLAG_ACTIVE));
4565 link = qc->dev->link;
4567 if (likely(qc->flags & ATA_QCFLAG_DMAMAP))
4570 /* command should be marked inactive atomically with qc completion */
4571 if (ata_is_ncq(qc->tf.protocol)) {
4572 link->sactive &= ~(1 << qc->hw_tag);
4574 ap->nr_active_links--;
4576 link->active_tag = ATA_TAG_POISON;
4577 ap->nr_active_links--;
4580 /* clear exclusive status */
4581 if (unlikely(qc->flags & ATA_QCFLAG_CLEAR_EXCL &&
4582 ap->excl_link == link))
4583 ap->excl_link = NULL;
4585 /* atapi: mark qc as inactive to prevent the interrupt handler
4586 * from completing the command twice later, before the error handler
4587 * is called. (when rc != 0 and atapi request sense is needed)
4589 qc->flags &= ~ATA_QCFLAG_ACTIVE;
4590 ap->qc_active &= ~(1ULL << qc->tag);
4592 /* call completion callback */
4593 qc->complete_fn(qc);
4596 static void fill_result_tf(struct ata_queued_cmd *qc)
4598 struct ata_port *ap = qc->ap;
4600 qc->result_tf.flags = qc->tf.flags;
4601 ap->ops->qc_fill_rtf(qc);
4604 static void ata_verify_xfer(struct ata_queued_cmd *qc)
4606 struct ata_device *dev = qc->dev;
4608 if (!ata_is_data(qc->tf.protocol))
4611 if ((dev->mwdma_mask || dev->udma_mask) && ata_is_pio(qc->tf.protocol))
4614 dev->flags &= ~ATA_DFLAG_DUBIOUS_XFER;
4618 * ata_qc_complete - Complete an active ATA command
4619 * @qc: Command to complete
4621 * Indicate to the mid and upper layers that an ATA command has
4622 * completed, with either an ok or not-ok status.
4624 * Refrain from calling this function multiple times when
4625 * successfully completing multiple NCQ commands.
4626 * ata_qc_complete_multiple() should be used instead, which will
4627 * properly update IRQ expect state.
4630 * spin_lock_irqsave(host lock)
4632 void ata_qc_complete(struct ata_queued_cmd *qc)
4634 struct ata_port *ap = qc->ap;
4636 /* Trigger the LED (if available) */
4637 ledtrig_disk_activity(!!(qc->tf.flags & ATA_TFLAG_WRITE));
4639 /* XXX: New EH and old EH use different mechanisms to
4640 * synchronize EH with regular execution path.
4642 * In new EH, a failed qc is marked with ATA_QCFLAG_FAILED.
4643 * Normal execution path is responsible for not accessing a
4644 * failed qc. libata core enforces the rule by returning NULL
4645 * from ata_qc_from_tag() for failed qcs.
4647 * Old EH depends on ata_qc_complete() nullifying completion
4648 * requests if ATA_QCFLAG_EH_SCHEDULED is set. Old EH does
4649 * not synchronize with interrupt handler. Only PIO task is
4652 if (ap->ops->error_handler) {
4653 struct ata_device *dev = qc->dev;
4654 struct ata_eh_info *ehi = &dev->link->eh_info;
4656 if (unlikely(qc->err_mask))
4657 qc->flags |= ATA_QCFLAG_FAILED;
4660 * Finish internal commands without any further processing
4661 * and always with the result TF filled.
4663 if (unlikely(ata_tag_internal(qc->tag))) {
4665 trace_ata_qc_complete_internal(qc);
4666 __ata_qc_complete(qc);
4671 * Non-internal qc has failed. Fill the result TF and
4674 if (unlikely(qc->flags & ATA_QCFLAG_FAILED)) {
4676 trace_ata_qc_complete_failed(qc);
4677 ata_qc_schedule_eh(qc);
4681 WARN_ON_ONCE(ap->pflags & ATA_PFLAG_FROZEN);
4683 /* read result TF if requested */
4684 if (qc->flags & ATA_QCFLAG_RESULT_TF)
4687 trace_ata_qc_complete_done(qc);
4688 /* Some commands need post-processing after successful
4691 switch (qc->tf.command) {
4692 case ATA_CMD_SET_FEATURES:
4693 if (qc->tf.feature != SETFEATURES_WC_ON &&
4694 qc->tf.feature != SETFEATURES_WC_OFF &&
4695 qc->tf.feature != SETFEATURES_RA_ON &&
4696 qc->tf.feature != SETFEATURES_RA_OFF)
4699 case ATA_CMD_INIT_DEV_PARAMS: /* CHS translation changed */
4700 case ATA_CMD_SET_MULTI: /* multi_count changed */
4701 /* revalidate device */
4702 ehi->dev_action[dev->devno] |= ATA_EH_REVALIDATE;
4703 ata_port_schedule_eh(ap);
4707 dev->flags |= ATA_DFLAG_SLEEPING;
4711 if (unlikely(dev->flags & ATA_DFLAG_DUBIOUS_XFER))
4712 ata_verify_xfer(qc);
4714 __ata_qc_complete(qc);
4716 if (qc->flags & ATA_QCFLAG_EH_SCHEDULED)
4719 /* read result TF if failed or requested */
4720 if (qc->err_mask || qc->flags & ATA_QCFLAG_RESULT_TF)
4723 __ata_qc_complete(qc);
4726 EXPORT_SYMBOL_GPL(ata_qc_complete);
4729 * ata_qc_get_active - get bitmask of active qcs
4730 * @ap: port in question
4733 * spin_lock_irqsave(host lock)
4736 * Bitmask of active qcs
4738 u64 ata_qc_get_active(struct ata_port *ap)
4740 u64 qc_active = ap->qc_active;
4742 /* ATA_TAG_INTERNAL is sent to hw as tag 0 */
4743 if (qc_active & (1ULL << ATA_TAG_INTERNAL)) {
4744 qc_active |= (1 << 0);
4745 qc_active &= ~(1ULL << ATA_TAG_INTERNAL);
4750 EXPORT_SYMBOL_GPL(ata_qc_get_active);
4753 * ata_qc_issue - issue taskfile to device
4754 * @qc: command to issue to device
4756 * Prepare an ATA command to submission to device.
4757 * This includes mapping the data into a DMA-able
4758 * area, filling in the S/G table, and finally
4759 * writing the taskfile to hardware, starting the command.
4762 * spin_lock_irqsave(host lock)
4764 void ata_qc_issue(struct ata_queued_cmd *qc)
4766 struct ata_port *ap = qc->ap;
4767 struct ata_link *link = qc->dev->link;
4768 u8 prot = qc->tf.protocol;
4770 /* Make sure only one non-NCQ command is outstanding. The
4771 * check is skipped for old EH because it reuses active qc to
4772 * request ATAPI sense.
4774 WARN_ON_ONCE(ap->ops->error_handler && ata_tag_valid(link->active_tag));
4776 if (ata_is_ncq(prot)) {
4777 WARN_ON_ONCE(link->sactive & (1 << qc->hw_tag));
4780 ap->nr_active_links++;
4781 link->sactive |= 1 << qc->hw_tag;
4783 WARN_ON_ONCE(link->sactive);
4785 ap->nr_active_links++;
4786 link->active_tag = qc->tag;
4789 qc->flags |= ATA_QCFLAG_ACTIVE;
4790 ap->qc_active |= 1ULL << qc->tag;
4793 * We guarantee to LLDs that they will have at least one
4794 * non-zero sg if the command is a data command.
4796 if (ata_is_data(prot) && (!qc->sg || !qc->n_elem || !qc->nbytes))
4799 if (ata_is_dma(prot) || (ata_is_pio(prot) &&
4800 (ap->flags & ATA_FLAG_PIO_DMA)))
4801 if (ata_sg_setup(qc))
4804 /* if device is sleeping, schedule reset and abort the link */
4805 if (unlikely(qc->dev->flags & ATA_DFLAG_SLEEPING)) {
4806 link->eh_info.action |= ATA_EH_RESET;
4807 ata_ehi_push_desc(&link->eh_info, "waking up from sleep");
4808 ata_link_abort(link);
4812 qc->err_mask |= ap->ops->qc_prep(qc);
4813 if (unlikely(qc->err_mask))
4815 trace_ata_qc_issue(qc);
4816 qc->err_mask |= ap->ops->qc_issue(qc);
4817 if (unlikely(qc->err_mask))
4822 qc->err_mask |= AC_ERR_SYSTEM;
4824 ata_qc_complete(qc);
4828 * ata_phys_link_online - test whether the given link is online
4829 * @link: ATA link to test
4831 * Test whether @link is online. Note that this function returns
4832 * 0 if online status of @link cannot be obtained, so
4833 * ata_link_online(link) != !ata_link_offline(link).
4839 * True if the port online status is available and online.
4841 bool ata_phys_link_online(struct ata_link *link)
4845 if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0 &&
4846 ata_sstatus_online(sstatus))
4852 * ata_phys_link_offline - test whether the given link is offline
4853 * @link: ATA link to test
4855 * Test whether @link is offline. Note that this function
4856 * returns 0 if offline status of @link cannot be obtained, so
4857 * ata_link_online(link) != !ata_link_offline(link).
4863 * True if the port offline status is available and offline.
4865 bool ata_phys_link_offline(struct ata_link *link)
4869 if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0 &&
4870 !ata_sstatus_online(sstatus))
4876 * ata_link_online - test whether the given link is online
4877 * @link: ATA link to test
4879 * Test whether @link is online. This is identical to
4880 * ata_phys_link_online() when there's no slave link. When
4881 * there's a slave link, this function should only be called on
4882 * the master link and will return true if any of M/S links is
4889 * True if the port online status is available and online.
4891 bool ata_link_online(struct ata_link *link)
4893 struct ata_link *slave = link->ap->slave_link;
4895 WARN_ON(link == slave); /* shouldn't be called on slave link */
4897 return ata_phys_link_online(link) ||
4898 (slave && ata_phys_link_online(slave));
4900 EXPORT_SYMBOL_GPL(ata_link_online);
4903 * ata_link_offline - test whether the given link is offline
4904 * @link: ATA link to test
4906 * Test whether @link is offline. This is identical to
4907 * ata_phys_link_offline() when there's no slave link. When
4908 * there's a slave link, this function should only be called on
4909 * the master link and will return true if both M/S links are
4916 * True if the port offline status is available and offline.
4918 bool ata_link_offline(struct ata_link *link)
4920 struct ata_link *slave = link->ap->slave_link;
4922 WARN_ON(link == slave); /* shouldn't be called on slave link */
4924 return ata_phys_link_offline(link) &&
4925 (!slave || ata_phys_link_offline(slave));
4927 EXPORT_SYMBOL_GPL(ata_link_offline);
4930 static void ata_port_request_pm(struct ata_port *ap, pm_message_t mesg,
4931 unsigned int action, unsigned int ehi_flags,
4934 struct ata_link *link;
4935 unsigned long flags;
4937 /* Previous resume operation might still be in
4938 * progress. Wait for PM_PENDING to clear.
4940 if (ap->pflags & ATA_PFLAG_PM_PENDING) {
4941 ata_port_wait_eh(ap);
4942 WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING);
4945 /* request PM ops to EH */
4946 spin_lock_irqsave(ap->lock, flags);
4949 ap->pflags |= ATA_PFLAG_PM_PENDING;
4950 ata_for_each_link(link, ap, HOST_FIRST) {
4951 link->eh_info.action |= action;
4952 link->eh_info.flags |= ehi_flags;
4955 ata_port_schedule_eh(ap);
4957 spin_unlock_irqrestore(ap->lock, flags);
4960 ata_port_wait_eh(ap);
4961 WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING);
4966 * On some hardware, device fails to respond after spun down for suspend. As
4967 * the device won't be used before being resumed, we don't need to touch the
4968 * device. Ask EH to skip the usual stuff and proceed directly to suspend.
4970 * http://thread.gmane.org/gmane.linux.ide/46764
4972 static const unsigned int ata_port_suspend_ehi = ATA_EHI_QUIET
4973 | ATA_EHI_NO_AUTOPSY
4974 | ATA_EHI_NO_RECOVERY;
4976 static void ata_port_suspend(struct ata_port *ap, pm_message_t mesg)
4978 ata_port_request_pm(ap, mesg, 0, ata_port_suspend_ehi, false);
4981 static void ata_port_suspend_async(struct ata_port *ap, pm_message_t mesg)
4983 ata_port_request_pm(ap, mesg, 0, ata_port_suspend_ehi, true);
4986 static int ata_port_pm_suspend(struct device *dev)
4988 struct ata_port *ap = to_ata_port(dev);
4990 if (pm_runtime_suspended(dev))
4993 ata_port_suspend(ap, PMSG_SUSPEND);
4997 static int ata_port_pm_freeze(struct device *dev)
4999 struct ata_port *ap = to_ata_port(dev);
5001 if (pm_runtime_suspended(dev))
5004 ata_port_suspend(ap, PMSG_FREEZE);
5008 static int ata_port_pm_poweroff(struct device *dev)
5010 ata_port_suspend(to_ata_port(dev), PMSG_HIBERNATE);
5014 static const unsigned int ata_port_resume_ehi = ATA_EHI_NO_AUTOPSY
5017 static void ata_port_resume(struct ata_port *ap, pm_message_t mesg)
5019 ata_port_request_pm(ap, mesg, ATA_EH_RESET, ata_port_resume_ehi, false);
5022 static void ata_port_resume_async(struct ata_port *ap, pm_message_t mesg)
5024 ata_port_request_pm(ap, mesg, ATA_EH_RESET, ata_port_resume_ehi, true);
5027 static int ata_port_pm_resume(struct device *dev)
5029 ata_port_resume_async(to_ata_port(dev), PMSG_RESUME);
5030 pm_runtime_disable(dev);
5031 pm_runtime_set_active(dev);
5032 pm_runtime_enable(dev);
5037 * For ODDs, the upper layer will poll for media change every few seconds,
5038 * which will make it enter and leave suspend state every few seconds. And
5039 * as each suspend will cause a hard/soft reset, the gain of runtime suspend
5040 * is very little and the ODD may malfunction after constantly being reset.
5041 * So the idle callback here will not proceed to suspend if a non-ZPODD capable
5042 * ODD is attached to the port.
5044 static int ata_port_runtime_idle(struct device *dev)
5046 struct ata_port *ap = to_ata_port(dev);
5047 struct ata_link *link;
5048 struct ata_device *adev;
5050 ata_for_each_link(link, ap, HOST_FIRST) {
5051 ata_for_each_dev(adev, link, ENABLED)
5052 if (adev->class == ATA_DEV_ATAPI &&
5053 !zpodd_dev_enabled(adev))
5060 static int ata_port_runtime_suspend(struct device *dev)
5062 ata_port_suspend(to_ata_port(dev), PMSG_AUTO_SUSPEND);
5066 static int ata_port_runtime_resume(struct device *dev)
5068 ata_port_resume(to_ata_port(dev), PMSG_AUTO_RESUME);
5072 static const struct dev_pm_ops ata_port_pm_ops = {
5073 .suspend = ata_port_pm_suspend,
5074 .resume = ata_port_pm_resume,
5075 .freeze = ata_port_pm_freeze,
5076 .thaw = ata_port_pm_resume,
5077 .poweroff = ata_port_pm_poweroff,
5078 .restore = ata_port_pm_resume,
5080 .runtime_suspend = ata_port_runtime_suspend,
5081 .runtime_resume = ata_port_runtime_resume,
5082 .runtime_idle = ata_port_runtime_idle,
5085 /* sas ports don't participate in pm runtime management of ata_ports,
5086 * and need to resume ata devices at the domain level, not the per-port
5087 * level. sas suspend/resume is async to allow parallel port recovery
5088 * since sas has multiple ata_port instances per Scsi_Host.
5090 void ata_sas_port_suspend(struct ata_port *ap)
5092 ata_port_suspend_async(ap, PMSG_SUSPEND);
5094 EXPORT_SYMBOL_GPL(ata_sas_port_suspend);
5096 void ata_sas_port_resume(struct ata_port *ap)
5098 ata_port_resume_async(ap, PMSG_RESUME);
5100 EXPORT_SYMBOL_GPL(ata_sas_port_resume);
5103 * ata_host_suspend - suspend host
5104 * @host: host to suspend
5107 * Suspend @host. Actual operation is performed by port suspend.
5109 int ata_host_suspend(struct ata_host *host, pm_message_t mesg)
5111 host->dev->power.power_state = mesg;
5114 EXPORT_SYMBOL_GPL(ata_host_suspend);
5117 * ata_host_resume - resume host
5118 * @host: host to resume
5120 * Resume @host. Actual operation is performed by port resume.
5122 void ata_host_resume(struct ata_host *host)
5124 host->dev->power.power_state = PMSG_ON;
5126 EXPORT_SYMBOL_GPL(ata_host_resume);
5129 const struct device_type ata_port_type = {
5132 .pm = &ata_port_pm_ops,
5137 * ata_dev_init - Initialize an ata_device structure
5138 * @dev: Device structure to initialize
5140 * Initialize @dev in preparation for probing.
5143 * Inherited from caller.
5145 void ata_dev_init(struct ata_device *dev)
5147 struct ata_link *link = ata_dev_phys_link(dev);
5148 struct ata_port *ap = link->ap;
5149 unsigned long flags;
5151 /* SATA spd limit is bound to the attached device, reset together */
5152 link->sata_spd_limit = link->hw_sata_spd_limit;
5155 /* High bits of dev->flags are used to record warm plug
5156 * requests which occur asynchronously. Synchronize using
5159 spin_lock_irqsave(ap->lock, flags);
5160 dev->flags &= ~ATA_DFLAG_INIT_MASK;
5162 spin_unlock_irqrestore(ap->lock, flags);
5164 memset((void *)dev + ATA_DEVICE_CLEAR_BEGIN, 0,
5165 ATA_DEVICE_CLEAR_END - ATA_DEVICE_CLEAR_BEGIN);
5166 dev->pio_mask = UINT_MAX;
5167 dev->mwdma_mask = UINT_MAX;
5168 dev->udma_mask = UINT_MAX;
5172 * ata_link_init - Initialize an ata_link structure
5173 * @ap: ATA port link is attached to
5174 * @link: Link structure to initialize
5175 * @pmp: Port multiplier port number
5180 * Kernel thread context (may sleep)
5182 void ata_link_init(struct ata_port *ap, struct ata_link *link, int pmp)
5186 /* clear everything except for devices */
5187 memset((void *)link + ATA_LINK_CLEAR_BEGIN, 0,
5188 ATA_LINK_CLEAR_END - ATA_LINK_CLEAR_BEGIN);
5192 link->active_tag = ATA_TAG_POISON;
5193 link->hw_sata_spd_limit = UINT_MAX;
5195 /* can't use iterator, ap isn't initialized yet */
5196 for (i = 0; i < ATA_MAX_DEVICES; i++) {
5197 struct ata_device *dev = &link->device[i];
5200 dev->devno = dev - link->device;
5201 #ifdef CONFIG_ATA_ACPI
5202 dev->gtf_filter = ata_acpi_gtf_filter;
5209 * sata_link_init_spd - Initialize link->sata_spd_limit
5210 * @link: Link to configure sata_spd_limit for
5212 * Initialize ``link->[hw_]sata_spd_limit`` to the currently
5216 * Kernel thread context (may sleep).
5219 * 0 on success, -errno on failure.
5221 int sata_link_init_spd(struct ata_link *link)
5226 rc = sata_scr_read(link, SCR_CONTROL, &link->saved_scontrol);
5230 spd = (link->saved_scontrol >> 4) & 0xf;
5232 link->hw_sata_spd_limit &= (1 << spd) - 1;
5234 ata_force_link_limits(link);
5236 link->sata_spd_limit = link->hw_sata_spd_limit;
5242 * ata_port_alloc - allocate and initialize basic ATA port resources
5243 * @host: ATA host this allocated port belongs to
5245 * Allocate and initialize basic ATA port resources.
5248 * Allocate ATA port on success, NULL on failure.
5251 * Inherited from calling layer (may sleep).
5253 struct ata_port *ata_port_alloc(struct ata_host *host)
5255 struct ata_port *ap;
5259 ap = kzalloc(sizeof(*ap), GFP_KERNEL);
5263 ap->pflags |= ATA_PFLAG_INITIALIZING | ATA_PFLAG_FROZEN;
5264 ap->lock = &host->lock;
5266 ap->local_port_no = -1;
5268 ap->dev = host->dev;
5270 #if defined(ATA_VERBOSE_DEBUG)
5271 /* turn on all debugging levels */
5272 ap->msg_enable = 0x00FF;
5273 #elif defined(ATA_DEBUG)
5274 ap->msg_enable = ATA_MSG_DRV | ATA_MSG_INFO | ATA_MSG_CTL | ATA_MSG_WARN | ATA_MSG_ERR;
5276 ap->msg_enable = ATA_MSG_DRV | ATA_MSG_ERR | ATA_MSG_WARN;
5279 mutex_init(&ap->scsi_scan_mutex);
5280 INIT_DELAYED_WORK(&ap->hotplug_task, ata_scsi_hotplug);
5281 INIT_WORK(&ap->scsi_rescan_task, ata_scsi_dev_rescan);
5282 INIT_LIST_HEAD(&ap->eh_done_q);
5283 init_waitqueue_head(&ap->eh_wait_q);
5284 init_completion(&ap->park_req_pending);
5285 timer_setup(&ap->fastdrain_timer, ata_eh_fastdrain_timerfn,
5288 ap->cbl = ATA_CBL_NONE;
5290 ata_link_init(ap, &ap->link, 0);
5293 ap->stats.unhandled_irq = 1;
5294 ap->stats.idle_irq = 1;
5296 ata_sff_port_init(ap);
5301 static void ata_devres_release(struct device *gendev, void *res)
5303 struct ata_host *host = dev_get_drvdata(gendev);
5306 for (i = 0; i < host->n_ports; i++) {
5307 struct ata_port *ap = host->ports[i];
5313 scsi_host_put(ap->scsi_host);
5317 dev_set_drvdata(gendev, NULL);
5321 static void ata_host_release(struct kref *kref)
5323 struct ata_host *host = container_of(kref, struct ata_host, kref);
5326 for (i = 0; i < host->n_ports; i++) {
5327 struct ata_port *ap = host->ports[i];
5329 kfree(ap->pmp_link);
5330 kfree(ap->slave_link);
5332 host->ports[i] = NULL;
5337 void ata_host_get(struct ata_host *host)
5339 kref_get(&host->kref);
5342 void ata_host_put(struct ata_host *host)
5344 kref_put(&host->kref, ata_host_release);
5346 EXPORT_SYMBOL_GPL(ata_host_put);
5349 * ata_host_alloc - allocate and init basic ATA host resources
5350 * @dev: generic device this host is associated with
5351 * @max_ports: maximum number of ATA ports associated with this host
5353 * Allocate and initialize basic ATA host resources. LLD calls
5354 * this function to allocate a host, initializes it fully and
5355 * attaches it using ata_host_register().
5357 * @max_ports ports are allocated and host->n_ports is
5358 * initialized to @max_ports. The caller is allowed to decrease
5359 * host->n_ports before calling ata_host_register(). The unused
5360 * ports will be automatically freed on registration.
5363 * Allocate ATA host on success, NULL on failure.
5366 * Inherited from calling layer (may sleep).
5368 struct ata_host *ata_host_alloc(struct device *dev, int max_ports)
5370 struct ata_host *host;
5377 /* alloc a container for our list of ATA ports (buses) */
5378 sz = sizeof(struct ata_host) + (max_ports + 1) * sizeof(void *);
5379 host = kzalloc(sz, GFP_KERNEL);
5383 if (!devres_open_group(dev, NULL, GFP_KERNEL))
5386 dr = devres_alloc(ata_devres_release, 0, GFP_KERNEL);
5390 devres_add(dev, dr);
5391 dev_set_drvdata(dev, host);
5393 spin_lock_init(&host->lock);
5394 mutex_init(&host->eh_mutex);
5396 host->n_ports = max_ports;
5397 kref_init(&host->kref);
5399 /* allocate ports bound to this host */
5400 for (i = 0; i < max_ports; i++) {
5401 struct ata_port *ap;
5403 ap = ata_port_alloc(host);
5408 host->ports[i] = ap;
5411 devres_remove_group(dev, NULL);
5415 devres_release_group(dev, NULL);
5420 EXPORT_SYMBOL_GPL(ata_host_alloc);
5423 * ata_host_alloc_pinfo - alloc host and init with port_info array
5424 * @dev: generic device this host is associated with
5425 * @ppi: array of ATA port_info to initialize host with
5426 * @n_ports: number of ATA ports attached to this host
5428 * Allocate ATA host and initialize with info from @ppi. If NULL
5429 * terminated, @ppi may contain fewer entries than @n_ports. The
5430 * last entry will be used for the remaining ports.
5433 * Allocate ATA host on success, NULL on failure.
5436 * Inherited from calling layer (may sleep).
5438 struct ata_host *ata_host_alloc_pinfo(struct device *dev,
5439 const struct ata_port_info * const * ppi,
5442 const struct ata_port_info *pi;
5443 struct ata_host *host;
5446 host = ata_host_alloc(dev, n_ports);
5450 for (i = 0, j = 0, pi = NULL; i < host->n_ports; i++) {
5451 struct ata_port *ap = host->ports[i];
5456 ap->pio_mask = pi->pio_mask;
5457 ap->mwdma_mask = pi->mwdma_mask;
5458 ap->udma_mask = pi->udma_mask;
5459 ap->flags |= pi->flags;
5460 ap->link.flags |= pi->link_flags;
5461 ap->ops = pi->port_ops;
5463 if (!host->ops && (pi->port_ops != &ata_dummy_port_ops))
5464 host->ops = pi->port_ops;
5469 EXPORT_SYMBOL_GPL(ata_host_alloc_pinfo);
5471 static void ata_host_stop(struct device *gendev, void *res)
5473 struct ata_host *host = dev_get_drvdata(gendev);
5476 WARN_ON(!(host->flags & ATA_HOST_STARTED));
5478 for (i = 0; i < host->n_ports; i++) {
5479 struct ata_port *ap = host->ports[i];
5481 if (ap->ops->port_stop)
5482 ap->ops->port_stop(ap);
5485 if (host->ops->host_stop)
5486 host->ops->host_stop(host);
5490 * ata_finalize_port_ops - finalize ata_port_operations
5491 * @ops: ata_port_operations to finalize
5493 * An ata_port_operations can inherit from another ops and that
5494 * ops can again inherit from another. This can go on as many
5495 * times as necessary as long as there is no loop in the
5496 * inheritance chain.
5498 * Ops tables are finalized when the host is started. NULL or
5499 * unspecified entries are inherited from the closet ancestor
5500 * which has the method and the entry is populated with it.
5501 * After finalization, the ops table directly points to all the
5502 * methods and ->inherits is no longer necessary and cleared.
5504 * Using ATA_OP_NULL, inheriting ops can force a method to NULL.
5509 static void ata_finalize_port_ops(struct ata_port_operations *ops)
5511 static DEFINE_SPINLOCK(lock);
5512 const struct ata_port_operations *cur;
5513 void **begin = (void **)ops;
5514 void **end = (void **)&ops->inherits;
5517 if (!ops || !ops->inherits)
5522 for (cur = ops->inherits; cur; cur = cur->inherits) {
5523 void **inherit = (void **)cur;
5525 for (pp = begin; pp < end; pp++, inherit++)
5530 for (pp = begin; pp < end; pp++)
5534 ops->inherits = NULL;
5540 * ata_host_start - start and freeze ports of an ATA host
5541 * @host: ATA host to start ports for
5543 * Start and then freeze ports of @host. Started status is
5544 * recorded in host->flags, so this function can be called
5545 * multiple times. Ports are guaranteed to get started only
5546 * once. If host->ops isn't initialized yet, its set to the
5547 * first non-dummy port ops.
5550 * Inherited from calling layer (may sleep).
5553 * 0 if all ports are started successfully, -errno otherwise.
5555 int ata_host_start(struct ata_host *host)
5558 void *start_dr = NULL;
5561 if (host->flags & ATA_HOST_STARTED)
5564 ata_finalize_port_ops(host->ops);
5566 for (i = 0; i < host->n_ports; i++) {
5567 struct ata_port *ap = host->ports[i];
5569 ata_finalize_port_ops(ap->ops);
5571 if (!host->ops && !ata_port_is_dummy(ap))
5572 host->ops = ap->ops;
5574 if (ap->ops->port_stop)
5578 if (host->ops->host_stop)
5582 start_dr = devres_alloc(ata_host_stop, 0, GFP_KERNEL);
5587 for (i = 0; i < host->n_ports; i++) {
5588 struct ata_port *ap = host->ports[i];
5590 if (ap->ops->port_start) {
5591 rc = ap->ops->port_start(ap);
5595 "failed to start port %d (errno=%d)\n",
5600 ata_eh_freeze_port(ap);
5604 devres_add(host->dev, start_dr);
5605 host->flags |= ATA_HOST_STARTED;
5610 struct ata_port *ap = host->ports[i];
5612 if (ap->ops->port_stop)
5613 ap->ops->port_stop(ap);
5615 devres_free(start_dr);
5618 EXPORT_SYMBOL_GPL(ata_host_start);
5621 * ata_sas_host_init - Initialize a host struct for sas (ipr, libsas)
5622 * @host: host to initialize
5623 * @dev: device host is attached to
5627 void ata_host_init(struct ata_host *host, struct device *dev,
5628 struct ata_port_operations *ops)
5630 spin_lock_init(&host->lock);
5631 mutex_init(&host->eh_mutex);
5632 host->n_tags = ATA_MAX_QUEUE;
5635 kref_init(&host->kref);
5637 EXPORT_SYMBOL_GPL(ata_host_init);
5639 void __ata_port_probe(struct ata_port *ap)
5641 struct ata_eh_info *ehi = &ap->link.eh_info;
5642 unsigned long flags;
5644 /* kick EH for boot probing */
5645 spin_lock_irqsave(ap->lock, flags);
5647 ehi->probe_mask |= ATA_ALL_DEVICES;
5648 ehi->action |= ATA_EH_RESET;
5649 ehi->flags |= ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET;
5651 ap->pflags &= ~ATA_PFLAG_INITIALIZING;
5652 ap->pflags |= ATA_PFLAG_LOADING;
5653 ata_port_schedule_eh(ap);
5655 spin_unlock_irqrestore(ap->lock, flags);
5658 int ata_port_probe(struct ata_port *ap)
5662 if (ap->ops->error_handler) {
5663 __ata_port_probe(ap);
5664 ata_port_wait_eh(ap);
5666 DPRINTK("ata%u: bus probe begin\n", ap->print_id);
5667 rc = ata_bus_probe(ap);
5668 DPRINTK("ata%u: bus probe end\n", ap->print_id);
5674 static void async_port_probe(void *data, async_cookie_t cookie)
5676 struct ata_port *ap = data;
5679 * If we're not allowed to scan this host in parallel,
5680 * we need to wait until all previous scans have completed
5681 * before going further.
5682 * Jeff Garzik says this is only within a controller, so we
5683 * don't need to wait for port 0, only for later ports.
5685 if (!(ap->host->flags & ATA_HOST_PARALLEL_SCAN) && ap->port_no != 0)
5686 async_synchronize_cookie(cookie);
5688 (void)ata_port_probe(ap);
5690 /* in order to keep device order, we need to synchronize at this point */
5691 async_synchronize_cookie(cookie);
5693 ata_scsi_scan_host(ap, 1);
5697 * ata_host_register - register initialized ATA host
5698 * @host: ATA host to register
5699 * @sht: template for SCSI host
5701 * Register initialized ATA host. @host is allocated using
5702 * ata_host_alloc() and fully initialized by LLD. This function
5703 * starts ports, registers @host with ATA and SCSI layers and
5704 * probe registered devices.
5707 * Inherited from calling layer (may sleep).
5710 * 0 on success, -errno otherwise.
5712 int ata_host_register(struct ata_host *host, struct scsi_host_template *sht)
5716 host->n_tags = clamp(sht->can_queue, 1, ATA_MAX_QUEUE);
5718 /* host must have been started */
5719 if (!(host->flags & ATA_HOST_STARTED)) {
5720 dev_err(host->dev, "BUG: trying to register unstarted host\n");
5725 /* Blow away unused ports. This happens when LLD can't
5726 * determine the exact number of ports to allocate at
5729 for (i = host->n_ports; host->ports[i]; i++)
5730 kfree(host->ports[i]);
5732 /* give ports names and add SCSI hosts */
5733 for (i = 0; i < host->n_ports; i++) {
5734 host->ports[i]->print_id = atomic_inc_return(&ata_print_id);
5735 host->ports[i]->local_port_no = i + 1;
5738 /* Create associated sysfs transport objects */
5739 for (i = 0; i < host->n_ports; i++) {
5740 rc = ata_tport_add(host->dev,host->ports[i]);
5746 rc = ata_scsi_add_hosts(host, sht);
5750 /* set cable, sata_spd_limit and report */
5751 for (i = 0; i < host->n_ports; i++) {
5752 struct ata_port *ap = host->ports[i];
5753 unsigned long xfer_mask;
5755 /* set SATA cable type if still unset */
5756 if (ap->cbl == ATA_CBL_NONE && (ap->flags & ATA_FLAG_SATA))
5757 ap->cbl = ATA_CBL_SATA;
5759 /* init sata_spd_limit to the current value */
5760 sata_link_init_spd(&ap->link);
5762 sata_link_init_spd(ap->slave_link);
5764 /* print per-port info to dmesg */
5765 xfer_mask = ata_pack_xfermask(ap->pio_mask, ap->mwdma_mask,
5768 if (!ata_port_is_dummy(ap)) {
5769 ata_port_info(ap, "%cATA max %s %s\n",
5770 (ap->flags & ATA_FLAG_SATA) ? 'S' : 'P',
5771 ata_mode_string(xfer_mask),
5772 ap->link.eh_info.desc);
5773 ata_ehi_clear_desc(&ap->link.eh_info);
5775 ata_port_info(ap, "DUMMY\n");
5778 /* perform each probe asynchronously */
5779 for (i = 0; i < host->n_ports; i++) {
5780 struct ata_port *ap = host->ports[i];
5781 async_schedule(async_port_probe, ap);
5788 ata_tport_delete(host->ports[i]);
5793 EXPORT_SYMBOL_GPL(ata_host_register);
5796 * ata_host_activate - start host, request IRQ and register it
5797 * @host: target ATA host
5798 * @irq: IRQ to request
5799 * @irq_handler: irq_handler used when requesting IRQ
5800 * @irq_flags: irq_flags used when requesting IRQ
5801 * @sht: scsi_host_template to use when registering the host
5803 * After allocating an ATA host and initializing it, most libata
5804 * LLDs perform three steps to activate the host - start host,
5805 * request IRQ and register it. This helper takes necessary
5806 * arguments and performs the three steps in one go.
5808 * An invalid IRQ skips the IRQ registration and expects the host to
5809 * have set polling mode on the port. In this case, @irq_handler
5813 * Inherited from calling layer (may sleep).
5816 * 0 on success, -errno otherwise.
5818 int ata_host_activate(struct ata_host *host, int irq,
5819 irq_handler_t irq_handler, unsigned long irq_flags,
5820 struct scsi_host_template *sht)
5825 rc = ata_host_start(host);
5829 /* Special case for polling mode */
5831 WARN_ON(irq_handler);
5832 return ata_host_register(host, sht);
5835 irq_desc = devm_kasprintf(host->dev, GFP_KERNEL, "%s[%s]",
5836 dev_driver_string(host->dev),
5837 dev_name(host->dev));
5841 rc = devm_request_irq(host->dev, irq, irq_handler, irq_flags,
5846 for (i = 0; i < host->n_ports; i++)
5847 ata_port_desc(host->ports[i], "irq %d", irq);
5849 rc = ata_host_register(host, sht);
5850 /* if failed, just free the IRQ and leave ports alone */
5852 devm_free_irq(host->dev, irq, host);
5856 EXPORT_SYMBOL_GPL(ata_host_activate);
5859 * ata_port_detach - Detach ATA port in preparation of device removal
5860 * @ap: ATA port to be detached
5862 * Detach all ATA devices and the associated SCSI devices of @ap;
5863 * then, remove the associated SCSI host. @ap is guaranteed to
5864 * be quiescent on return from this function.
5867 * Kernel thread context (may sleep).
5869 static void ata_port_detach(struct ata_port *ap)
5871 unsigned long flags;
5872 struct ata_link *link;
5873 struct ata_device *dev;
5875 if (!ap->ops->error_handler)
5878 /* tell EH we're leaving & flush EH */
5879 spin_lock_irqsave(ap->lock, flags);
5880 ap->pflags |= ATA_PFLAG_UNLOADING;
5881 ata_port_schedule_eh(ap);
5882 spin_unlock_irqrestore(ap->lock, flags);
5884 /* wait till EH commits suicide */
5885 ata_port_wait_eh(ap);
5887 /* it better be dead now */
5888 WARN_ON(!(ap->pflags & ATA_PFLAG_UNLOADED));
5890 cancel_delayed_work_sync(&ap->hotplug_task);
5893 /* clean up zpodd on port removal */
5894 ata_for_each_link(link, ap, HOST_FIRST) {
5895 ata_for_each_dev(dev, link, ALL) {
5896 if (zpodd_dev_enabled(dev))
5902 for (i = 0; i < SATA_PMP_MAX_PORTS; i++)
5903 ata_tlink_delete(&ap->pmp_link[i]);
5905 /* remove the associated SCSI host */
5906 scsi_remove_host(ap->scsi_host);
5907 ata_tport_delete(ap);
5911 * ata_host_detach - Detach all ports of an ATA host
5912 * @host: Host to detach
5914 * Detach all ports of @host.
5917 * Kernel thread context (may sleep).
5919 void ata_host_detach(struct ata_host *host)
5923 /* Ensure ata_port probe has completed */
5924 async_synchronize_full();
5926 for (i = 0; i < host->n_ports; i++)
5927 ata_port_detach(host->ports[i]);
5929 /* the host is dead now, dissociate ACPI */
5930 ata_acpi_dissociate(host);
5932 EXPORT_SYMBOL_GPL(ata_host_detach);
5937 * ata_pci_remove_one - PCI layer callback for device removal
5938 * @pdev: PCI device that was removed
5940 * PCI layer indicates to libata via this hook that hot-unplug or
5941 * module unload event has occurred. Detach all ports. Resource
5942 * release is handled via devres.
5945 * Inherited from PCI layer (may sleep).
5947 void ata_pci_remove_one(struct pci_dev *pdev)
5949 struct ata_host *host = pci_get_drvdata(pdev);
5951 ata_host_detach(host);
5953 EXPORT_SYMBOL_GPL(ata_pci_remove_one);
5955 void ata_pci_shutdown_one(struct pci_dev *pdev)
5957 struct ata_host *host = pci_get_drvdata(pdev);
5960 for (i = 0; i < host->n_ports; i++) {
5961 struct ata_port *ap = host->ports[i];
5963 ap->pflags |= ATA_PFLAG_FROZEN;
5965 /* Disable port interrupts */
5966 if (ap->ops->freeze)
5967 ap->ops->freeze(ap);
5969 /* Stop the port DMA engines */
5970 if (ap->ops->port_stop)
5971 ap->ops->port_stop(ap);
5974 EXPORT_SYMBOL_GPL(ata_pci_shutdown_one);
5976 /* move to PCI subsystem */
5977 int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits)
5979 unsigned long tmp = 0;
5981 switch (bits->width) {
5984 pci_read_config_byte(pdev, bits->reg, &tmp8);
5990 pci_read_config_word(pdev, bits->reg, &tmp16);
5996 pci_read_config_dword(pdev, bits->reg, &tmp32);
6007 return (tmp == bits->val) ? 1 : 0;
6009 EXPORT_SYMBOL_GPL(pci_test_config_bits);
6012 void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg)
6014 pci_save_state(pdev);
6015 pci_disable_device(pdev);
6017 if (mesg.event & PM_EVENT_SLEEP)
6018 pci_set_power_state(pdev, PCI_D3hot);
6020 EXPORT_SYMBOL_GPL(ata_pci_device_do_suspend);
6022 int ata_pci_device_do_resume(struct pci_dev *pdev)
6026 pci_set_power_state(pdev, PCI_D0);
6027 pci_restore_state(pdev);
6029 rc = pcim_enable_device(pdev);
6032 "failed to enable device after resume (%d)\n", rc);
6036 pci_set_master(pdev);
6039 EXPORT_SYMBOL_GPL(ata_pci_device_do_resume);
6041 int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg)
6043 struct ata_host *host = pci_get_drvdata(pdev);
6046 rc = ata_host_suspend(host, mesg);
6050 ata_pci_device_do_suspend(pdev, mesg);
6054 EXPORT_SYMBOL_GPL(ata_pci_device_suspend);
6056 int ata_pci_device_resume(struct pci_dev *pdev)
6058 struct ata_host *host = pci_get_drvdata(pdev);
6061 rc = ata_pci_device_do_resume(pdev);
6063 ata_host_resume(host);
6066 EXPORT_SYMBOL_GPL(ata_pci_device_resume);
6067 #endif /* CONFIG_PM */
6068 #endif /* CONFIG_PCI */
6071 * ata_platform_remove_one - Platform layer callback for device removal
6072 * @pdev: Platform device that was removed
6074 * Platform layer indicates to libata via this hook that hot-unplug or
6075 * module unload event has occurred. Detach all ports. Resource
6076 * release is handled via devres.
6079 * Inherited from platform layer (may sleep).
6081 int ata_platform_remove_one(struct platform_device *pdev)
6083 struct ata_host *host = platform_get_drvdata(pdev);
6085 ata_host_detach(host);
6089 EXPORT_SYMBOL_GPL(ata_platform_remove_one);
6091 #ifdef CONFIG_ATA_FORCE
6092 static int __init ata_parse_force_one(char **cur,
6093 struct ata_force_ent *force_ent,
6094 const char **reason)
6096 static const struct ata_force_param force_tbl[] __initconst = {
6097 { "40c", .cbl = ATA_CBL_PATA40 },
6098 { "80c", .cbl = ATA_CBL_PATA80 },
6099 { "short40c", .cbl = ATA_CBL_PATA40_SHORT },
6100 { "unk", .cbl = ATA_CBL_PATA_UNK },
6101 { "ign", .cbl = ATA_CBL_PATA_IGN },
6102 { "sata", .cbl = ATA_CBL_SATA },
6103 { "1.5Gbps", .spd_limit = 1 },
6104 { "3.0Gbps", .spd_limit = 2 },
6105 { "noncq", .horkage_on = ATA_HORKAGE_NONCQ },
6106 { "ncq", .horkage_off = ATA_HORKAGE_NONCQ },
6107 { "noncqtrim", .horkage_on = ATA_HORKAGE_NO_NCQ_TRIM },
6108 { "ncqtrim", .horkage_off = ATA_HORKAGE_NO_NCQ_TRIM },
6109 { "dump_id", .horkage_on = ATA_HORKAGE_DUMP_ID },
6110 { "pio0", .xfer_mask = 1 << (ATA_SHIFT_PIO + 0) },
6111 { "pio1", .xfer_mask = 1 << (ATA_SHIFT_PIO + 1) },
6112 { "pio2", .xfer_mask = 1 << (ATA_SHIFT_PIO + 2) },
6113 { "pio3", .xfer_mask = 1 << (ATA_SHIFT_PIO + 3) },
6114 { "pio4", .xfer_mask = 1 << (ATA_SHIFT_PIO + 4) },
6115 { "pio5", .xfer_mask = 1 << (ATA_SHIFT_PIO + 5) },
6116 { "pio6", .xfer_mask = 1 << (ATA_SHIFT_PIO + 6) },
6117 { "mwdma0", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 0) },
6118 { "mwdma1", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 1) },
6119 { "mwdma2", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 2) },
6120 { "mwdma3", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 3) },
6121 { "mwdma4", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 4) },
6122 { "udma0", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 0) },
6123 { "udma16", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 0) },
6124 { "udma/16", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 0) },
6125 { "udma1", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 1) },
6126 { "udma25", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 1) },
6127 { "udma/25", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 1) },
6128 { "udma2", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 2) },
6129 { "udma33", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 2) },
6130 { "udma/33", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 2) },
6131 { "udma3", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 3) },
6132 { "udma44", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 3) },
6133 { "udma/44", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 3) },
6134 { "udma4", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 4) },
6135 { "udma66", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 4) },
6136 { "udma/66", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 4) },
6137 { "udma5", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 5) },
6138 { "udma100", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 5) },
6139 { "udma/100", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 5) },
6140 { "udma6", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 6) },
6141 { "udma133", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 6) },
6142 { "udma/133", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 6) },
6143 { "udma7", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 7) },
6144 { "nohrst", .lflags = ATA_LFLAG_NO_HRST },
6145 { "nosrst", .lflags = ATA_LFLAG_NO_SRST },
6146 { "norst", .lflags = ATA_LFLAG_NO_HRST | ATA_LFLAG_NO_SRST },
6147 { "rstonce", .lflags = ATA_LFLAG_RST_ONCE },
6148 { "atapi_dmadir", .horkage_on = ATA_HORKAGE_ATAPI_DMADIR },
6149 { "disable", .horkage_on = ATA_HORKAGE_DISABLE },
6151 char *start = *cur, *p = *cur;
6152 char *id, *val, *endp;
6153 const struct ata_force_param *match_fp = NULL;
6154 int nr_matches = 0, i;
6156 /* find where this param ends and update *cur */
6157 while (*p != '\0' && *p != ',')
6168 p = strchr(start, ':');
6170 val = strstrip(start);
6175 id = strstrip(start);
6176 val = strstrip(p + 1);
6179 p = strchr(id, '.');
6182 force_ent->device = simple_strtoul(p, &endp, 10);
6183 if (p == endp || *endp != '\0') {
6184 *reason = "invalid device";
6189 force_ent->port = simple_strtoul(id, &endp, 10);
6190 if (id == endp || *endp != '\0') {
6191 *reason = "invalid port/link";
6196 /* parse val, allow shortcuts so that both 1.5 and 1.5Gbps work */
6197 for (i = 0; i < ARRAY_SIZE(force_tbl); i++) {
6198 const struct ata_force_param *fp = &force_tbl[i];
6200 if (strncasecmp(val, fp->name, strlen(val)))
6206 if (strcasecmp(val, fp->name) == 0) {
6213 *reason = "unknown value";
6216 if (nr_matches > 1) {
6217 *reason = "ambiguous value";
6221 force_ent->param = *match_fp;
6226 static void __init ata_parse_force_param(void)
6228 int idx = 0, size = 1;
6229 int last_port = -1, last_device = -1;
6230 char *p, *cur, *next;
6232 /* calculate maximum number of params and allocate force_tbl */
6233 for (p = ata_force_param_buf; *p; p++)
6237 ata_force_tbl = kcalloc(size, sizeof(ata_force_tbl[0]), GFP_KERNEL);
6238 if (!ata_force_tbl) {
6239 printk(KERN_WARNING "ata: failed to extend force table, "
6240 "libata.force ignored\n");
6244 /* parse and populate the table */
6245 for (cur = ata_force_param_buf; *cur != '\0'; cur = next) {
6246 const char *reason = "";
6247 struct ata_force_ent te = { .port = -1, .device = -1 };
6250 if (ata_parse_force_one(&next, &te, &reason)) {
6251 printk(KERN_WARNING "ata: failed to parse force "
6252 "parameter \"%s\" (%s)\n",
6257 if (te.port == -1) {
6258 te.port = last_port;
6259 te.device = last_device;
6262 ata_force_tbl[idx++] = te;
6264 last_port = te.port;
6265 last_device = te.device;
6268 ata_force_tbl_size = idx;
6271 static void ata_free_force_param(void)
6273 kfree(ata_force_tbl);
6276 static inline void ata_parse_force_param(void) { }
6277 static inline void ata_free_force_param(void) { }
6280 static int __init ata_init(void)
6284 ata_parse_force_param();
6286 rc = ata_sff_init();
6288 ata_free_force_param();
6292 libata_transport_init();
6293 ata_scsi_transport_template = ata_attach_transport();
6294 if (!ata_scsi_transport_template) {
6300 printk(KERN_DEBUG "libata version " DRV_VERSION " loaded.\n");
6307 static void __exit ata_exit(void)
6309 ata_release_transport(ata_scsi_transport_template);
6310 libata_transport_exit();
6312 ata_free_force_param();
6315 subsys_initcall(ata_init);
6316 module_exit(ata_exit);
6318 static DEFINE_RATELIMIT_STATE(ratelimit, HZ / 5, 1);
6320 int ata_ratelimit(void)
6322 return __ratelimit(&ratelimit);
6324 EXPORT_SYMBOL_GPL(ata_ratelimit);
6327 * ata_msleep - ATA EH owner aware msleep
6328 * @ap: ATA port to attribute the sleep to
6329 * @msecs: duration to sleep in milliseconds
6331 * Sleeps @msecs. If the current task is owner of @ap's EH, the
6332 * ownership is released before going to sleep and reacquired
6333 * after the sleep is complete. IOW, other ports sharing the
6334 * @ap->host will be allowed to own the EH while this task is
6340 void ata_msleep(struct ata_port *ap, unsigned int msecs)
6342 bool owns_eh = ap && ap->host->eh_owner == current;
6348 unsigned long usecs = msecs * USEC_PER_MSEC;
6349 usleep_range(usecs, usecs + 50);
6357 EXPORT_SYMBOL_GPL(ata_msleep);
6360 * ata_wait_register - wait until register value changes
6361 * @ap: ATA port to wait register for, can be NULL
6362 * @reg: IO-mapped register
6363 * @mask: Mask to apply to read register value
6364 * @val: Wait condition
6365 * @interval: polling interval in milliseconds
6366 * @timeout: timeout in milliseconds
6368 * Waiting for some bits of register to change is a common
6369 * operation for ATA controllers. This function reads 32bit LE
6370 * IO-mapped register @reg and tests for the following condition.
6372 * (*@reg & mask) != val
6374 * If the condition is met, it returns; otherwise, the process is
6375 * repeated after @interval_msec until timeout.
6378 * Kernel thread context (may sleep)
6381 * The final register value.
6383 u32 ata_wait_register(struct ata_port *ap, void __iomem *reg, u32 mask, u32 val,
6384 unsigned long interval, unsigned long timeout)
6386 unsigned long deadline;
6389 tmp = ioread32(reg);
6391 /* Calculate timeout _after_ the first read to make sure
6392 * preceding writes reach the controller before starting to
6393 * eat away the timeout.
6395 deadline = ata_deadline(jiffies, timeout);
6397 while ((tmp & mask) == val && time_before(jiffies, deadline)) {
6398 ata_msleep(ap, interval);
6399 tmp = ioread32(reg);
6404 EXPORT_SYMBOL_GPL(ata_wait_register);
6409 static unsigned int ata_dummy_qc_issue(struct ata_queued_cmd *qc)
6411 return AC_ERR_SYSTEM;
6414 static void ata_dummy_error_handler(struct ata_port *ap)
6419 struct ata_port_operations ata_dummy_port_ops = {
6420 .qc_prep = ata_noop_qc_prep,
6421 .qc_issue = ata_dummy_qc_issue,
6422 .error_handler = ata_dummy_error_handler,
6423 .sched_eh = ata_std_sched_eh,
6424 .end_eh = ata_std_end_eh,
6426 EXPORT_SYMBOL_GPL(ata_dummy_port_ops);
6428 const struct ata_port_info ata_dummy_port_info = {
6429 .port_ops = &ata_dummy_port_ops,
6431 EXPORT_SYMBOL_GPL(ata_dummy_port_info);
6434 * Utility print functions
6436 void ata_port_printk(const struct ata_port *ap, const char *level,
6437 const char *fmt, ...)
6439 struct va_format vaf;
6442 va_start(args, fmt);
6447 printk("%sata%u: %pV", level, ap->print_id, &vaf);
6451 EXPORT_SYMBOL(ata_port_printk);
6453 void ata_link_printk(const struct ata_link *link, const char *level,
6454 const char *fmt, ...)
6456 struct va_format vaf;
6459 va_start(args, fmt);
6464 if (sata_pmp_attached(link->ap) || link->ap->slave_link)
6465 printk("%sata%u.%02u: %pV",
6466 level, link->ap->print_id, link->pmp, &vaf);
6468 printk("%sata%u: %pV",
6469 level, link->ap->print_id, &vaf);
6473 EXPORT_SYMBOL(ata_link_printk);
6475 void ata_dev_printk(const struct ata_device *dev, const char *level,
6476 const char *fmt, ...)
6478 struct va_format vaf;
6481 va_start(args, fmt);
6486 printk("%sata%u.%02u: %pV",
6487 level, dev->link->ap->print_id, dev->link->pmp + dev->devno,
6492 EXPORT_SYMBOL(ata_dev_printk);
6494 void ata_print_version(const struct device *dev, const char *version)
6496 dev_printk(KERN_DEBUG, dev, "version %s\n", version);
6498 EXPORT_SYMBOL(ata_print_version);