1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * libata-core.c - helper library for ATA
5 * Copyright 2003-2004 Red Hat, Inc. All rights reserved.
6 * Copyright 2003-2004 Jeff Garzik
8 * libata documentation is available via 'make {ps|pdf}docs',
9 * as Documentation/driver-api/libata.rst
11 * Hardware documentation available from http://www.t13.org/ and
12 * http://www.sata-io.org/
14 * Standards documents from:
15 * http://www.t13.org (ATA standards, PCI DMA IDE spec)
16 * http://www.t10.org (SCSI MMC - for ATAPI MMC)
17 * http://www.sata-io.org (SATA)
18 * http://www.compactflash.org (CF)
19 * http://www.qic.org (QIC157 - Tape and DSC)
20 * http://www.ce-ata.org (CE-ATA: not supported)
22 * libata is essentially a library of internal helper functions for
23 * low-level ATA host controller drivers. As such, the API/ABI is
24 * likely to change as new drivers are added and updated.
25 * Do not depend on ABI/API stability.
28 #include <linux/kernel.h>
29 #include <linux/module.h>
30 #include <linux/pci.h>
31 #include <linux/init.h>
32 #include <linux/list.h>
34 #include <linux/spinlock.h>
35 #include <linux/blkdev.h>
36 #include <linux/delay.h>
37 #include <linux/timer.h>
38 #include <linux/time.h>
39 #include <linux/interrupt.h>
40 #include <linux/completion.h>
41 #include <linux/suspend.h>
42 #include <linux/workqueue.h>
43 #include <linux/scatterlist.h>
45 #include <linux/log2.h>
46 #include <linux/slab.h>
47 #include <linux/glob.h>
48 #include <scsi/scsi.h>
49 #include <scsi/scsi_cmnd.h>
50 #include <scsi/scsi_host.h>
51 #include <linux/libata.h>
52 #include <asm/byteorder.h>
53 #include <asm/unaligned.h>
54 #include <linux/cdrom.h>
55 #include <linux/ratelimit.h>
56 #include <linux/leds.h>
57 #include <linux/pm_runtime.h>
58 #include <linux/platform_device.h>
59 #include <asm/setup.h>
61 #define CREATE_TRACE_POINTS
62 #include <trace/events/libata.h>
65 #include "libata-transport.h"
67 const struct ata_port_operations ata_base_port_ops = {
68 .prereset = ata_std_prereset,
69 .postreset = ata_std_postreset,
70 .error_handler = ata_std_error_handler,
71 .sched_eh = ata_std_sched_eh,
72 .end_eh = ata_std_end_eh,
75 const struct ata_port_operations sata_port_ops = {
76 .inherits = &ata_base_port_ops,
78 .qc_defer = ata_std_qc_defer,
79 .hardreset = sata_std_hardreset,
81 EXPORT_SYMBOL_GPL(sata_port_ops);
83 static unsigned int ata_dev_init_params(struct ata_device *dev,
84 u16 heads, u16 sectors);
85 static unsigned int ata_dev_set_xfermode(struct ata_device *dev);
86 static void ata_dev_xfermask(struct ata_device *dev);
87 static unsigned long ata_dev_blacklisted(const struct ata_device *dev);
89 atomic_t ata_print_id = ATOMIC_INIT(0);
91 #ifdef CONFIG_ATA_FORCE
92 struct ata_force_param {
96 unsigned long xfer_mask;
97 unsigned int horkage_on;
98 unsigned int horkage_off;
102 struct ata_force_ent {
105 struct ata_force_param param;
108 static struct ata_force_ent *ata_force_tbl;
109 static int ata_force_tbl_size;
111 static char ata_force_param_buf[COMMAND_LINE_SIZE] __initdata;
112 /* param_buf is thrown away after initialization, disallow read */
113 module_param_string(force, ata_force_param_buf, sizeof(ata_force_param_buf), 0);
114 MODULE_PARM_DESC(force, "Force ATA configurations including cable type, link speed and transfer mode (see Documentation/admin-guide/kernel-parameters.rst for details)");
117 static int atapi_enabled = 1;
118 module_param(atapi_enabled, int, 0444);
119 MODULE_PARM_DESC(atapi_enabled, "Enable discovery of ATAPI devices (0=off, 1=on [default])");
121 static int atapi_dmadir = 0;
122 module_param(atapi_dmadir, int, 0444);
123 MODULE_PARM_DESC(atapi_dmadir, "Enable ATAPI DMADIR bridge support (0=off [default], 1=on)");
125 int atapi_passthru16 = 1;
126 module_param(atapi_passthru16, int, 0444);
127 MODULE_PARM_DESC(atapi_passthru16, "Enable ATA_16 passthru for ATAPI devices (0=off, 1=on [default])");
130 module_param_named(fua, libata_fua, int, 0444);
131 MODULE_PARM_DESC(fua, "FUA support (0=off [default], 1=on)");
133 static int ata_ignore_hpa;
134 module_param_named(ignore_hpa, ata_ignore_hpa, int, 0644);
135 MODULE_PARM_DESC(ignore_hpa, "Ignore HPA limit (0=keep BIOS limits, 1=ignore limits, using full disk)");
137 static int libata_dma_mask = ATA_DMA_MASK_ATA|ATA_DMA_MASK_ATAPI|ATA_DMA_MASK_CFA;
138 module_param_named(dma, libata_dma_mask, int, 0444);
139 MODULE_PARM_DESC(dma, "DMA enable/disable (0x1==ATA, 0x2==ATAPI, 0x4==CF)");
141 static int ata_probe_timeout;
142 module_param(ata_probe_timeout, int, 0444);
143 MODULE_PARM_DESC(ata_probe_timeout, "Set ATA probing timeout (seconds)");
145 int libata_noacpi = 0;
146 module_param_named(noacpi, libata_noacpi, int, 0444);
147 MODULE_PARM_DESC(noacpi, "Disable the use of ACPI in probe/suspend/resume (0=off [default], 1=on)");
149 int libata_allow_tpm = 0;
150 module_param_named(allow_tpm, libata_allow_tpm, int, 0444);
151 MODULE_PARM_DESC(allow_tpm, "Permit the use of TPM commands (0=off [default], 1=on)");
154 module_param(atapi_an, int, 0444);
155 MODULE_PARM_DESC(atapi_an, "Enable ATAPI AN media presence notification (0=0ff [default], 1=on)");
157 MODULE_AUTHOR("Jeff Garzik");
158 MODULE_DESCRIPTION("Library module for ATA devices");
159 MODULE_LICENSE("GPL");
160 MODULE_VERSION(DRV_VERSION);
162 static inline bool ata_dev_print_info(struct ata_device *dev)
164 struct ata_eh_context *ehc = &dev->link->eh_context;
166 return ehc->i.flags & ATA_EHI_PRINTINFO;
169 static bool ata_sstatus_online(u32 sstatus)
171 return (sstatus & 0xf) == 0x3;
175 * ata_link_next - link iteration helper
176 * @link: the previous link, NULL to start
177 * @ap: ATA port containing links to iterate
178 * @mode: iteration mode, one of ATA_LITER_*
181 * Host lock or EH context.
184 * Pointer to the next link.
186 struct ata_link *ata_link_next(struct ata_link *link, struct ata_port *ap,
187 enum ata_link_iter_mode mode)
189 BUG_ON(mode != ATA_LITER_EDGE &&
190 mode != ATA_LITER_PMP_FIRST && mode != ATA_LITER_HOST_FIRST);
192 /* NULL link indicates start of iteration */
196 case ATA_LITER_PMP_FIRST:
197 if (sata_pmp_attached(ap))
200 case ATA_LITER_HOST_FIRST:
204 /* we just iterated over the host link, what's next? */
205 if (link == &ap->link)
207 case ATA_LITER_HOST_FIRST:
208 if (sata_pmp_attached(ap))
211 case ATA_LITER_PMP_FIRST:
212 if (unlikely(ap->slave_link))
213 return ap->slave_link;
219 /* slave_link excludes PMP */
220 if (unlikely(link == ap->slave_link))
223 /* we were over a PMP link */
224 if (++link < ap->pmp_link + ap->nr_pmp_links)
227 if (mode == ATA_LITER_PMP_FIRST)
232 EXPORT_SYMBOL_GPL(ata_link_next);
235 * ata_dev_next - device iteration helper
236 * @dev: the previous device, NULL to start
237 * @link: ATA link containing devices to iterate
238 * @mode: iteration mode, one of ATA_DITER_*
241 * Host lock or EH context.
244 * Pointer to the next device.
246 struct ata_device *ata_dev_next(struct ata_device *dev, struct ata_link *link,
247 enum ata_dev_iter_mode mode)
249 BUG_ON(mode != ATA_DITER_ENABLED && mode != ATA_DITER_ENABLED_REVERSE &&
250 mode != ATA_DITER_ALL && mode != ATA_DITER_ALL_REVERSE);
252 /* NULL dev indicates start of iteration */
255 case ATA_DITER_ENABLED:
259 case ATA_DITER_ENABLED_REVERSE:
260 case ATA_DITER_ALL_REVERSE:
261 dev = link->device + ata_link_max_devices(link) - 1;
266 /* move to the next one */
268 case ATA_DITER_ENABLED:
270 if (++dev < link->device + ata_link_max_devices(link))
273 case ATA_DITER_ENABLED_REVERSE:
274 case ATA_DITER_ALL_REVERSE:
275 if (--dev >= link->device)
281 if ((mode == ATA_DITER_ENABLED || mode == ATA_DITER_ENABLED_REVERSE) &&
282 !ata_dev_enabled(dev))
286 EXPORT_SYMBOL_GPL(ata_dev_next);
289 * ata_dev_phys_link - find physical link for a device
290 * @dev: ATA device to look up physical link for
292 * Look up physical link which @dev is attached to. Note that
293 * this is different from @dev->link only when @dev is on slave
294 * link. For all other cases, it's the same as @dev->link.
300 * Pointer to the found physical link.
302 struct ata_link *ata_dev_phys_link(struct ata_device *dev)
304 struct ata_port *ap = dev->link->ap;
310 return ap->slave_link;
313 #ifdef CONFIG_ATA_FORCE
315 * ata_force_cbl - force cable type according to libata.force
316 * @ap: ATA port of interest
318 * Force cable type according to libata.force and whine about it.
319 * The last entry which has matching port number is used, so it
320 * can be specified as part of device force parameters. For
321 * example, both "a:40c,1.00:udma4" and "1.00:40c,udma4" have the
327 void ata_force_cbl(struct ata_port *ap)
331 for (i = ata_force_tbl_size - 1; i >= 0; i--) {
332 const struct ata_force_ent *fe = &ata_force_tbl[i];
334 if (fe->port != -1 && fe->port != ap->print_id)
337 if (fe->param.cbl == ATA_CBL_NONE)
340 ap->cbl = fe->param.cbl;
341 ata_port_notice(ap, "FORCE: cable set to %s\n", fe->param.name);
347 * ata_force_link_limits - force link limits according to libata.force
348 * @link: ATA link of interest
350 * Force link flags and SATA spd limit according to libata.force
351 * and whine about it. When only the port part is specified
352 * (e.g. 1:), the limit applies to all links connected to both
353 * the host link and all fan-out ports connected via PMP. If the
354 * device part is specified as 0 (e.g. 1.00:), it specifies the
355 * first fan-out link not the host link. Device number 15 always
356 * points to the host link whether PMP is attached or not. If the
357 * controller has slave link, device number 16 points to it.
362 static void ata_force_link_limits(struct ata_link *link)
364 bool did_spd = false;
365 int linkno = link->pmp;
368 if (ata_is_host_link(link))
371 for (i = ata_force_tbl_size - 1; i >= 0; i--) {
372 const struct ata_force_ent *fe = &ata_force_tbl[i];
374 if (fe->port != -1 && fe->port != link->ap->print_id)
377 if (fe->device != -1 && fe->device != linkno)
380 /* only honor the first spd limit */
381 if (!did_spd && fe->param.spd_limit) {
382 link->hw_sata_spd_limit = (1 << fe->param.spd_limit) - 1;
383 ata_link_notice(link, "FORCE: PHY spd limit set to %s\n",
388 /* let lflags stack */
389 if (fe->param.lflags) {
390 link->flags |= fe->param.lflags;
391 ata_link_notice(link,
392 "FORCE: link flag 0x%x forced -> 0x%x\n",
393 fe->param.lflags, link->flags);
399 * ata_force_xfermask - force xfermask according to libata.force
400 * @dev: ATA device of interest
402 * Force xfer_mask according to libata.force and whine about it.
403 * For consistency with link selection, device number 15 selects
404 * the first device connected to the host link.
409 static void ata_force_xfermask(struct ata_device *dev)
411 int devno = dev->link->pmp + dev->devno;
412 int alt_devno = devno;
415 /* allow n.15/16 for devices attached to host port */
416 if (ata_is_host_link(dev->link))
419 for (i = ata_force_tbl_size - 1; i >= 0; i--) {
420 const struct ata_force_ent *fe = &ata_force_tbl[i];
421 unsigned long pio_mask, mwdma_mask, udma_mask;
423 if (fe->port != -1 && fe->port != dev->link->ap->print_id)
426 if (fe->device != -1 && fe->device != devno &&
427 fe->device != alt_devno)
430 if (!fe->param.xfer_mask)
433 ata_unpack_xfermask(fe->param.xfer_mask,
434 &pio_mask, &mwdma_mask, &udma_mask);
436 dev->udma_mask = udma_mask;
437 else if (mwdma_mask) {
439 dev->mwdma_mask = mwdma_mask;
443 dev->pio_mask = pio_mask;
446 ata_dev_notice(dev, "FORCE: xfer_mask set to %s\n",
453 * ata_force_horkage - force horkage according to libata.force
454 * @dev: ATA device of interest
456 * Force horkage according to libata.force and whine about it.
457 * For consistency with link selection, device number 15 selects
458 * the first device connected to the host link.
463 static void ata_force_horkage(struct ata_device *dev)
465 int devno = dev->link->pmp + dev->devno;
466 int alt_devno = devno;
469 /* allow n.15/16 for devices attached to host port */
470 if (ata_is_host_link(dev->link))
473 for (i = 0; i < ata_force_tbl_size; i++) {
474 const struct ata_force_ent *fe = &ata_force_tbl[i];
476 if (fe->port != -1 && fe->port != dev->link->ap->print_id)
479 if (fe->device != -1 && fe->device != devno &&
480 fe->device != alt_devno)
483 if (!(~dev->horkage & fe->param.horkage_on) &&
484 !(dev->horkage & fe->param.horkage_off))
487 dev->horkage |= fe->param.horkage_on;
488 dev->horkage &= ~fe->param.horkage_off;
490 ata_dev_notice(dev, "FORCE: horkage modified (%s)\n",
495 static inline void ata_force_link_limits(struct ata_link *link) { }
496 static inline void ata_force_xfermask(struct ata_device *dev) { }
497 static inline void ata_force_horkage(struct ata_device *dev) { }
501 * atapi_cmd_type - Determine ATAPI command type from SCSI opcode
502 * @opcode: SCSI opcode
504 * Determine ATAPI command type from @opcode.
510 * ATAPI_{READ|WRITE|READ_CD|PASS_THRU|MISC}
512 int atapi_cmd_type(u8 opcode)
521 case GPCMD_WRITE_AND_VERIFY_10:
525 case GPCMD_READ_CD_MSF:
526 return ATAPI_READ_CD;
530 if (atapi_passthru16)
531 return ATAPI_PASS_THRU;
537 EXPORT_SYMBOL_GPL(atapi_cmd_type);
539 static const u8 ata_rw_cmds[] = {
543 ATA_CMD_READ_MULTI_EXT,
544 ATA_CMD_WRITE_MULTI_EXT,
548 ATA_CMD_WRITE_MULTI_FUA_EXT,
552 ATA_CMD_PIO_READ_EXT,
553 ATA_CMD_PIO_WRITE_EXT,
566 ATA_CMD_WRITE_FUA_EXT
570 * ata_rwcmd_protocol - set taskfile r/w commands and protocol
571 * @tf: command to examine and configure
572 * @dev: device tf belongs to
574 * Examine the device configuration and tf->flags to calculate
575 * the proper read/write commands and protocol to use.
580 static int ata_rwcmd_protocol(struct ata_taskfile *tf, struct ata_device *dev)
584 int index, fua, lba48, write;
586 fua = (tf->flags & ATA_TFLAG_FUA) ? 4 : 0;
587 lba48 = (tf->flags & ATA_TFLAG_LBA48) ? 2 : 0;
588 write = (tf->flags & ATA_TFLAG_WRITE) ? 1 : 0;
590 if (dev->flags & ATA_DFLAG_PIO) {
591 tf->protocol = ATA_PROT_PIO;
592 index = dev->multi_count ? 0 : 8;
593 } else if (lba48 && (dev->link->ap->flags & ATA_FLAG_PIO_LBA48)) {
594 /* Unable to use DMA due to host limitation */
595 tf->protocol = ATA_PROT_PIO;
596 index = dev->multi_count ? 0 : 8;
598 tf->protocol = ATA_PROT_DMA;
602 cmd = ata_rw_cmds[index + fua + lba48 + write];
611 * ata_tf_read_block - Read block address from ATA taskfile
612 * @tf: ATA taskfile of interest
613 * @dev: ATA device @tf belongs to
618 * Read block address from @tf. This function can handle all
619 * three address formats - LBA, LBA48 and CHS. tf->protocol and
620 * flags select the address format to use.
623 * Block address read from @tf.
625 u64 ata_tf_read_block(const struct ata_taskfile *tf, struct ata_device *dev)
629 if (tf->flags & ATA_TFLAG_LBA) {
630 if (tf->flags & ATA_TFLAG_LBA48) {
631 block |= (u64)tf->hob_lbah << 40;
632 block |= (u64)tf->hob_lbam << 32;
633 block |= (u64)tf->hob_lbal << 24;
635 block |= (tf->device & 0xf) << 24;
637 block |= tf->lbah << 16;
638 block |= tf->lbam << 8;
643 cyl = tf->lbam | (tf->lbah << 8);
644 head = tf->device & 0xf;
649 "device reported invalid CHS sector 0\n");
653 block = (cyl * dev->heads + head) * dev->sectors + sect - 1;
660 * ata_build_rw_tf - Build ATA taskfile for given read/write request
661 * @tf: Target ATA taskfile
662 * @dev: ATA device @tf belongs to
663 * @block: Block address
664 * @n_block: Number of blocks
665 * @tf_flags: RW/FUA etc...
667 * @class: IO priority class
672 * Build ATA taskfile @tf for read/write request described by
673 * @block, @n_block, @tf_flags and @tag on @dev.
677 * 0 on success, -ERANGE if the request is too large for @dev,
678 * -EINVAL if the request is invalid.
680 int ata_build_rw_tf(struct ata_taskfile *tf, struct ata_device *dev,
681 u64 block, u32 n_block, unsigned int tf_flags,
682 unsigned int tag, int class)
684 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
685 tf->flags |= tf_flags;
687 if (ata_ncq_enabled(dev) && !ata_tag_internal(tag)) {
689 if (!lba_48_ok(block, n_block))
692 tf->protocol = ATA_PROT_NCQ;
693 tf->flags |= ATA_TFLAG_LBA | ATA_TFLAG_LBA48;
695 if (tf->flags & ATA_TFLAG_WRITE)
696 tf->command = ATA_CMD_FPDMA_WRITE;
698 tf->command = ATA_CMD_FPDMA_READ;
700 tf->nsect = tag << 3;
701 tf->hob_feature = (n_block >> 8) & 0xff;
702 tf->feature = n_block & 0xff;
704 tf->hob_lbah = (block >> 40) & 0xff;
705 tf->hob_lbam = (block >> 32) & 0xff;
706 tf->hob_lbal = (block >> 24) & 0xff;
707 tf->lbah = (block >> 16) & 0xff;
708 tf->lbam = (block >> 8) & 0xff;
709 tf->lbal = block & 0xff;
711 tf->device = ATA_LBA;
712 if (tf->flags & ATA_TFLAG_FUA)
713 tf->device |= 1 << 7;
715 if (dev->flags & ATA_DFLAG_NCQ_PRIO_ENABLE &&
716 class == IOPRIO_CLASS_RT)
717 tf->hob_nsect |= ATA_PRIO_HIGH << ATA_SHIFT_PRIO;
718 } else if (dev->flags & ATA_DFLAG_LBA) {
719 tf->flags |= ATA_TFLAG_LBA;
721 if (lba_28_ok(block, n_block)) {
723 tf->device |= (block >> 24) & 0xf;
724 } else if (lba_48_ok(block, n_block)) {
725 if (!(dev->flags & ATA_DFLAG_LBA48))
729 tf->flags |= ATA_TFLAG_LBA48;
731 tf->hob_nsect = (n_block >> 8) & 0xff;
733 tf->hob_lbah = (block >> 40) & 0xff;
734 tf->hob_lbam = (block >> 32) & 0xff;
735 tf->hob_lbal = (block >> 24) & 0xff;
737 /* request too large even for LBA48 */
740 if (unlikely(ata_rwcmd_protocol(tf, dev) < 0))
743 tf->nsect = n_block & 0xff;
745 tf->lbah = (block >> 16) & 0xff;
746 tf->lbam = (block >> 8) & 0xff;
747 tf->lbal = block & 0xff;
749 tf->device |= ATA_LBA;
752 u32 sect, head, cyl, track;
754 /* The request -may- be too large for CHS addressing. */
755 if (!lba_28_ok(block, n_block))
758 if (unlikely(ata_rwcmd_protocol(tf, dev) < 0))
761 /* Convert LBA to CHS */
762 track = (u32)block / dev->sectors;
763 cyl = track / dev->heads;
764 head = track % dev->heads;
765 sect = (u32)block % dev->sectors + 1;
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)
1013 if (tf->lbam == 0x14 && tf->lbah == 0xeb)
1014 return ATA_DEV_ATAPI;
1016 if (tf->lbam == 0x69 && tf->lbah == 0x96)
1019 if (tf->lbam == 0x3c && tf->lbah == 0xc3)
1020 return ATA_DEV_SEMB;
1022 if (tf->lbam == 0xcd && tf->lbah == 0xab)
1025 return ATA_DEV_UNKNOWN;
1027 EXPORT_SYMBOL_GPL(ata_dev_classify);
1030 * ata_id_string - Convert IDENTIFY DEVICE page into string
1031 * @id: IDENTIFY DEVICE results we will examine
1032 * @s: string into which data is output
1033 * @ofs: offset into identify device page
1034 * @len: length of string to return. must be an even number.
1036 * The strings in the IDENTIFY DEVICE page are broken up into
1037 * 16-bit chunks. Run through the string, and output each
1038 * 8-bit chunk linearly, regardless of platform.
1044 void ata_id_string(const u16 *id, unsigned char *s,
1045 unsigned int ofs, unsigned int len)
1064 EXPORT_SYMBOL_GPL(ata_id_string);
1067 * ata_id_c_string - Convert IDENTIFY DEVICE page into C string
1068 * @id: IDENTIFY DEVICE results we will examine
1069 * @s: string into which data is output
1070 * @ofs: offset into identify device page
1071 * @len: length of string to return. must be an odd number.
1073 * This function is identical to ata_id_string except that it
1074 * trims trailing spaces and terminates the resulting string with
1075 * null. @len must be actual maximum length (even number) + 1.
1080 void ata_id_c_string(const u16 *id, unsigned char *s,
1081 unsigned int ofs, unsigned int len)
1085 ata_id_string(id, s, ofs, len - 1);
1087 p = s + strnlen(s, len - 1);
1088 while (p > s && p[-1] == ' ')
1092 EXPORT_SYMBOL_GPL(ata_id_c_string);
1094 static u64 ata_id_n_sectors(const u16 *id)
1096 if (ata_id_has_lba(id)) {
1097 if (ata_id_has_lba48(id))
1098 return ata_id_u64(id, ATA_ID_LBA_CAPACITY_2);
1100 return ata_id_u32(id, ATA_ID_LBA_CAPACITY);
1102 if (ata_id_current_chs_valid(id))
1103 return id[ATA_ID_CUR_CYLS] * id[ATA_ID_CUR_HEADS] *
1104 id[ATA_ID_CUR_SECTORS];
1106 return id[ATA_ID_CYLS] * id[ATA_ID_HEADS] *
1111 u64 ata_tf_to_lba48(const struct ata_taskfile *tf)
1115 sectors |= ((u64)(tf->hob_lbah & 0xff)) << 40;
1116 sectors |= ((u64)(tf->hob_lbam & 0xff)) << 32;
1117 sectors |= ((u64)(tf->hob_lbal & 0xff)) << 24;
1118 sectors |= (tf->lbah & 0xff) << 16;
1119 sectors |= (tf->lbam & 0xff) << 8;
1120 sectors |= (tf->lbal & 0xff);
1125 u64 ata_tf_to_lba(const struct ata_taskfile *tf)
1129 sectors |= (tf->device & 0x0f) << 24;
1130 sectors |= (tf->lbah & 0xff) << 16;
1131 sectors |= (tf->lbam & 0xff) << 8;
1132 sectors |= (tf->lbal & 0xff);
1138 * ata_read_native_max_address - Read native max address
1139 * @dev: target device
1140 * @max_sectors: out parameter for the result native max address
1142 * Perform an LBA48 or LBA28 native size query upon the device in
1146 * 0 on success, -EACCES if command is aborted by the drive.
1147 * -EIO on other errors.
1149 static int ata_read_native_max_address(struct ata_device *dev, u64 *max_sectors)
1151 unsigned int err_mask;
1152 struct ata_taskfile tf;
1153 int lba48 = ata_id_has_lba48(dev->id);
1155 ata_tf_init(dev, &tf);
1157 /* always clear all address registers */
1158 tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
1161 tf.command = ATA_CMD_READ_NATIVE_MAX_EXT;
1162 tf.flags |= ATA_TFLAG_LBA48;
1164 tf.command = ATA_CMD_READ_NATIVE_MAX;
1166 tf.protocol = ATA_PROT_NODATA;
1167 tf.device |= ATA_LBA;
1169 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
1172 "failed to read native max address (err_mask=0x%x)\n",
1174 if (err_mask == AC_ERR_DEV && (tf.error & ATA_ABORTED))
1180 *max_sectors = ata_tf_to_lba48(&tf) + 1;
1182 *max_sectors = ata_tf_to_lba(&tf) + 1;
1183 if (dev->horkage & ATA_HORKAGE_HPA_SIZE)
1189 * ata_set_max_sectors - Set max sectors
1190 * @dev: target device
1191 * @new_sectors: new max sectors value to set for the device
1193 * Set max sectors of @dev to @new_sectors.
1196 * 0 on success, -EACCES if command is aborted or denied (due to
1197 * previous non-volatile SET_MAX) by the drive. -EIO on other
1200 static int ata_set_max_sectors(struct ata_device *dev, u64 new_sectors)
1202 unsigned int err_mask;
1203 struct ata_taskfile tf;
1204 int lba48 = ata_id_has_lba48(dev->id);
1208 ata_tf_init(dev, &tf);
1210 tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
1213 tf.command = ATA_CMD_SET_MAX_EXT;
1214 tf.flags |= ATA_TFLAG_LBA48;
1216 tf.hob_lbal = (new_sectors >> 24) & 0xff;
1217 tf.hob_lbam = (new_sectors >> 32) & 0xff;
1218 tf.hob_lbah = (new_sectors >> 40) & 0xff;
1220 tf.command = ATA_CMD_SET_MAX;
1222 tf.device |= (new_sectors >> 24) & 0xf;
1225 tf.protocol = ATA_PROT_NODATA;
1226 tf.device |= ATA_LBA;
1228 tf.lbal = (new_sectors >> 0) & 0xff;
1229 tf.lbam = (new_sectors >> 8) & 0xff;
1230 tf.lbah = (new_sectors >> 16) & 0xff;
1232 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
1235 "failed to set max address (err_mask=0x%x)\n",
1237 if (err_mask == AC_ERR_DEV &&
1238 (tf.error & (ATA_ABORTED | ATA_IDNF)))
1247 * ata_hpa_resize - Resize a device with an HPA set
1248 * @dev: Device to resize
1250 * Read the size of an LBA28 or LBA48 disk with HPA features and resize
1251 * it if required to the full size of the media. The caller must check
1252 * the drive has the HPA feature set enabled.
1255 * 0 on success, -errno on failure.
1257 static int ata_hpa_resize(struct ata_device *dev)
1259 bool print_info = ata_dev_print_info(dev);
1260 bool unlock_hpa = ata_ignore_hpa || dev->flags & ATA_DFLAG_UNLOCK_HPA;
1261 u64 sectors = ata_id_n_sectors(dev->id);
1265 /* do we need to do it? */
1266 if ((dev->class != ATA_DEV_ATA && dev->class != ATA_DEV_ZAC) ||
1267 !ata_id_has_lba(dev->id) || !ata_id_hpa_enabled(dev->id) ||
1268 (dev->horkage & ATA_HORKAGE_BROKEN_HPA))
1271 /* read native max address */
1272 rc = ata_read_native_max_address(dev, &native_sectors);
1274 /* If device aborted the command or HPA isn't going to
1275 * be unlocked, skip HPA resizing.
1277 if (rc == -EACCES || !unlock_hpa) {
1279 "HPA support seems broken, skipping HPA handling\n");
1280 dev->horkage |= ATA_HORKAGE_BROKEN_HPA;
1282 /* we can continue if device aborted the command */
1289 dev->n_native_sectors = native_sectors;
1291 /* nothing to do? */
1292 if (native_sectors <= sectors || !unlock_hpa) {
1293 if (!print_info || native_sectors == sectors)
1296 if (native_sectors > sectors)
1298 "HPA detected: current %llu, native %llu\n",
1299 (unsigned long long)sectors,
1300 (unsigned long long)native_sectors);
1301 else if (native_sectors < sectors)
1303 "native sectors (%llu) is smaller than sectors (%llu)\n",
1304 (unsigned long long)native_sectors,
1305 (unsigned long long)sectors);
1309 /* let's unlock HPA */
1310 rc = ata_set_max_sectors(dev, native_sectors);
1311 if (rc == -EACCES) {
1312 /* if device aborted the command, skip HPA resizing */
1314 "device aborted resize (%llu -> %llu), skipping HPA handling\n",
1315 (unsigned long long)sectors,
1316 (unsigned long long)native_sectors);
1317 dev->horkage |= ATA_HORKAGE_BROKEN_HPA;
1322 /* re-read IDENTIFY data */
1323 rc = ata_dev_reread_id(dev, 0);
1326 "failed to re-read IDENTIFY data after HPA resizing\n");
1331 u64 new_sectors = ata_id_n_sectors(dev->id);
1333 "HPA unlocked: %llu -> %llu, native %llu\n",
1334 (unsigned long long)sectors,
1335 (unsigned long long)new_sectors,
1336 (unsigned long long)native_sectors);
1343 * ata_dump_id - IDENTIFY DEVICE info debugging output
1344 * @dev: device from which the information is fetched
1345 * @id: IDENTIFY DEVICE page to dump
1347 * Dump selected 16-bit words from the given IDENTIFY DEVICE
1354 static inline void ata_dump_id(struct ata_device *dev, const u16 *id)
1357 "49==0x%04x 53==0x%04x 63==0x%04x 64==0x%04x 75==0x%04x\n"
1358 "80==0x%04x 81==0x%04x 82==0x%04x 83==0x%04x 84==0x%04x\n"
1359 "88==0x%04x 93==0x%04x\n",
1360 id[49], id[53], id[63], id[64], id[75], id[80],
1361 id[81], id[82], id[83], id[84], id[88], id[93]);
1365 * ata_id_xfermask - Compute xfermask from the given IDENTIFY data
1366 * @id: IDENTIFY data to compute xfer mask from
1368 * Compute the xfermask for this device. This is not as trivial
1369 * as it seems if we must consider early devices correctly.
1371 * FIXME: pre IDE drive timing (do we care ?).
1379 unsigned long ata_id_xfermask(const u16 *id)
1381 unsigned long pio_mask, mwdma_mask, udma_mask;
1383 /* Usual case. Word 53 indicates word 64 is valid */
1384 if (id[ATA_ID_FIELD_VALID] & (1 << 1)) {
1385 pio_mask = id[ATA_ID_PIO_MODES] & 0x03;
1389 /* If word 64 isn't valid then Word 51 high byte holds
1390 * the PIO timing number for the maximum. Turn it into
1393 u8 mode = (id[ATA_ID_OLD_PIO_MODES] >> 8) & 0xFF;
1394 if (mode < 5) /* Valid PIO range */
1395 pio_mask = (2 << mode) - 1;
1399 /* But wait.. there's more. Design your standards by
1400 * committee and you too can get a free iordy field to
1401 * process. However its the speeds not the modes that
1402 * are supported... Note drivers using the timing API
1403 * will get this right anyway
1407 mwdma_mask = id[ATA_ID_MWDMA_MODES] & 0x07;
1409 if (ata_id_is_cfa(id)) {
1411 * Process compact flash extended modes
1413 int pio = (id[ATA_ID_CFA_MODES] >> 0) & 0x7;
1414 int dma = (id[ATA_ID_CFA_MODES] >> 3) & 0x7;
1417 pio_mask |= (1 << 5);
1419 pio_mask |= (1 << 6);
1421 mwdma_mask |= (1 << 3);
1423 mwdma_mask |= (1 << 4);
1427 if (id[ATA_ID_FIELD_VALID] & (1 << 2))
1428 udma_mask = id[ATA_ID_UDMA_MODES] & 0xff;
1430 return ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask);
1432 EXPORT_SYMBOL_GPL(ata_id_xfermask);
1434 static void ata_qc_complete_internal(struct ata_queued_cmd *qc)
1436 struct completion *waiting = qc->private_data;
1442 * ata_exec_internal_sg - execute libata internal command
1443 * @dev: Device to which the command is sent
1444 * @tf: Taskfile registers for the command and the result
1445 * @cdb: CDB for packet command
1446 * @dma_dir: Data transfer direction of the command
1447 * @sgl: sg list for the data buffer of the command
1448 * @n_elem: Number of sg entries
1449 * @timeout: Timeout in msecs (0 for default)
1451 * Executes libata internal command with timeout. @tf contains
1452 * command on entry and result on return. Timeout and error
1453 * conditions are reported via return value. No recovery action
1454 * is taken after a command times out. It's caller's duty to
1455 * clean up after timeout.
1458 * None. Should be called with kernel context, might sleep.
1461 * Zero on success, AC_ERR_* mask on failure
1463 unsigned ata_exec_internal_sg(struct ata_device *dev,
1464 struct ata_taskfile *tf, const u8 *cdb,
1465 int dma_dir, struct scatterlist *sgl,
1466 unsigned int n_elem, unsigned long timeout)
1468 struct ata_link *link = dev->link;
1469 struct ata_port *ap = link->ap;
1470 u8 command = tf->command;
1471 int auto_timeout = 0;
1472 struct ata_queued_cmd *qc;
1473 unsigned int preempted_tag;
1474 u32 preempted_sactive;
1475 u64 preempted_qc_active;
1476 int preempted_nr_active_links;
1477 DECLARE_COMPLETION_ONSTACK(wait);
1478 unsigned long flags;
1479 unsigned int err_mask;
1482 spin_lock_irqsave(ap->lock, flags);
1484 /* no internal command while frozen */
1485 if (ap->pflags & ATA_PFLAG_FROZEN) {
1486 spin_unlock_irqrestore(ap->lock, flags);
1487 return AC_ERR_SYSTEM;
1490 /* initialize internal qc */
1491 qc = __ata_qc_from_tag(ap, ATA_TAG_INTERNAL);
1493 qc->tag = ATA_TAG_INTERNAL;
1500 preempted_tag = link->active_tag;
1501 preempted_sactive = link->sactive;
1502 preempted_qc_active = ap->qc_active;
1503 preempted_nr_active_links = ap->nr_active_links;
1504 link->active_tag = ATA_TAG_POISON;
1507 ap->nr_active_links = 0;
1509 /* prepare & issue qc */
1512 memcpy(qc->cdb, cdb, ATAPI_CDB_LEN);
1514 /* some SATA bridges need us to indicate data xfer direction */
1515 if (tf->protocol == ATAPI_PROT_DMA && (dev->flags & ATA_DFLAG_DMADIR) &&
1516 dma_dir == DMA_FROM_DEVICE)
1517 qc->tf.feature |= ATAPI_DMADIR;
1519 qc->flags |= ATA_QCFLAG_RESULT_TF;
1520 qc->dma_dir = dma_dir;
1521 if (dma_dir != DMA_NONE) {
1522 unsigned int i, buflen = 0;
1523 struct scatterlist *sg;
1525 for_each_sg(sgl, sg, n_elem, i)
1526 buflen += sg->length;
1528 ata_sg_init(qc, sgl, n_elem);
1529 qc->nbytes = buflen;
1532 qc->private_data = &wait;
1533 qc->complete_fn = ata_qc_complete_internal;
1537 spin_unlock_irqrestore(ap->lock, flags);
1540 if (ata_probe_timeout)
1541 timeout = ata_probe_timeout * 1000;
1543 timeout = ata_internal_cmd_timeout(dev, command);
1548 if (ap->ops->error_handler)
1551 rc = wait_for_completion_timeout(&wait, msecs_to_jiffies(timeout));
1553 if (ap->ops->error_handler)
1556 ata_sff_flush_pio_task(ap);
1559 spin_lock_irqsave(ap->lock, flags);
1561 /* We're racing with irq here. If we lose, the
1562 * following test prevents us from completing the qc
1563 * twice. If we win, the port is frozen and will be
1564 * cleaned up by ->post_internal_cmd().
1566 if (qc->flags & ATA_QCFLAG_ACTIVE) {
1567 qc->err_mask |= AC_ERR_TIMEOUT;
1569 if (ap->ops->error_handler)
1570 ata_port_freeze(ap);
1572 ata_qc_complete(qc);
1574 ata_dev_warn(dev, "qc timeout (cmd 0x%x)\n",
1578 spin_unlock_irqrestore(ap->lock, flags);
1581 /* do post_internal_cmd */
1582 if (ap->ops->post_internal_cmd)
1583 ap->ops->post_internal_cmd(qc);
1585 /* perform minimal error analysis */
1586 if (qc->flags & ATA_QCFLAG_FAILED) {
1587 if (qc->result_tf.status & (ATA_ERR | ATA_DF))
1588 qc->err_mask |= AC_ERR_DEV;
1591 qc->err_mask |= AC_ERR_OTHER;
1593 if (qc->err_mask & ~AC_ERR_OTHER)
1594 qc->err_mask &= ~AC_ERR_OTHER;
1595 } else if (qc->tf.command == ATA_CMD_REQ_SENSE_DATA) {
1596 qc->result_tf.status |= ATA_SENSE;
1600 spin_lock_irqsave(ap->lock, flags);
1602 *tf = qc->result_tf;
1603 err_mask = qc->err_mask;
1606 link->active_tag = preempted_tag;
1607 link->sactive = preempted_sactive;
1608 ap->qc_active = preempted_qc_active;
1609 ap->nr_active_links = preempted_nr_active_links;
1611 spin_unlock_irqrestore(ap->lock, flags);
1613 if ((err_mask & AC_ERR_TIMEOUT) && auto_timeout)
1614 ata_internal_cmd_timed_out(dev, command);
1620 * ata_exec_internal - execute libata internal command
1621 * @dev: Device to which the command is sent
1622 * @tf: Taskfile registers for the command and the result
1623 * @cdb: CDB for packet command
1624 * @dma_dir: Data transfer direction of the command
1625 * @buf: Data buffer of the command
1626 * @buflen: Length of data buffer
1627 * @timeout: Timeout in msecs (0 for default)
1629 * Wrapper around ata_exec_internal_sg() which takes simple
1630 * buffer instead of sg list.
1633 * None. Should be called with kernel context, might sleep.
1636 * Zero on success, AC_ERR_* mask on failure
1638 unsigned ata_exec_internal(struct ata_device *dev,
1639 struct ata_taskfile *tf, const u8 *cdb,
1640 int dma_dir, void *buf, unsigned int buflen,
1641 unsigned long timeout)
1643 struct scatterlist *psg = NULL, sg;
1644 unsigned int n_elem = 0;
1646 if (dma_dir != DMA_NONE) {
1648 sg_init_one(&sg, buf, buflen);
1653 return ata_exec_internal_sg(dev, tf, cdb, dma_dir, psg, n_elem,
1658 * ata_pio_need_iordy - check if iordy needed
1661 * Check if the current speed of the device requires IORDY. Used
1662 * by various controllers for chip configuration.
1664 unsigned int ata_pio_need_iordy(const struct ata_device *adev)
1666 /* Don't set IORDY if we're preparing for reset. IORDY may
1667 * lead to controller lock up on certain controllers if the
1668 * port is not occupied. See bko#11703 for details.
1670 if (adev->link->ap->pflags & ATA_PFLAG_RESETTING)
1672 /* Controller doesn't support IORDY. Probably a pointless
1673 * check as the caller should know this.
1675 if (adev->link->ap->flags & ATA_FLAG_NO_IORDY)
1677 /* CF spec. r4.1 Table 22 says no iordy on PIO5 and PIO6. */
1678 if (ata_id_is_cfa(adev->id)
1679 && (adev->pio_mode == XFER_PIO_5 || adev->pio_mode == XFER_PIO_6))
1681 /* PIO3 and higher it is mandatory */
1682 if (adev->pio_mode > XFER_PIO_2)
1684 /* We turn it on when possible */
1685 if (ata_id_has_iordy(adev->id))
1689 EXPORT_SYMBOL_GPL(ata_pio_need_iordy);
1692 * ata_pio_mask_no_iordy - Return the non IORDY mask
1695 * Compute the highest mode possible if we are not using iordy. Return
1696 * -1 if no iordy mode is available.
1698 static u32 ata_pio_mask_no_iordy(const struct ata_device *adev)
1700 /* If we have no drive specific rule, then PIO 2 is non IORDY */
1701 if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE */
1702 u16 pio = adev->id[ATA_ID_EIDE_PIO];
1703 /* Is the speed faster than the drive allows non IORDY ? */
1705 /* This is cycle times not frequency - watch the logic! */
1706 if (pio > 240) /* PIO2 is 240nS per cycle */
1707 return 3 << ATA_SHIFT_PIO;
1708 return 7 << ATA_SHIFT_PIO;
1711 return 3 << ATA_SHIFT_PIO;
1715 * ata_do_dev_read_id - default ID read method
1717 * @tf: proposed taskfile
1720 * Issue the identify taskfile and hand back the buffer containing
1721 * identify data. For some RAID controllers and for pre ATA devices
1722 * this function is wrapped or replaced by the driver
1724 unsigned int ata_do_dev_read_id(struct ata_device *dev,
1725 struct ata_taskfile *tf, __le16 *id)
1727 return ata_exec_internal(dev, tf, NULL, DMA_FROM_DEVICE,
1728 id, sizeof(id[0]) * ATA_ID_WORDS, 0);
1730 EXPORT_SYMBOL_GPL(ata_do_dev_read_id);
1733 * ata_dev_read_id - Read ID data from the specified device
1734 * @dev: target device
1735 * @p_class: pointer to class of the target device (may be changed)
1736 * @flags: ATA_READID_* flags
1737 * @id: buffer to read IDENTIFY data into
1739 * Read ID data from the specified device. ATA_CMD_ID_ATA is
1740 * performed on ATA devices and ATA_CMD_ID_ATAPI on ATAPI
1741 * devices. This function also issues ATA_CMD_INIT_DEV_PARAMS
1742 * for pre-ATA4 drives.
1744 * FIXME: ATA_CMD_ID_ATA is optional for early drives and right
1745 * now we abort if we hit that case.
1748 * Kernel thread context (may sleep)
1751 * 0 on success, -errno otherwise.
1753 int ata_dev_read_id(struct ata_device *dev, unsigned int *p_class,
1754 unsigned int flags, u16 *id)
1756 struct ata_port *ap = dev->link->ap;
1757 unsigned int class = *p_class;
1758 struct ata_taskfile tf;
1759 unsigned int err_mask = 0;
1761 bool is_semb = class == ATA_DEV_SEMB;
1762 int may_fallback = 1, tried_spinup = 0;
1766 ata_tf_init(dev, &tf);
1770 class = ATA_DEV_ATA; /* some hard drives report SEMB sig */
1774 tf.command = ATA_CMD_ID_ATA;
1777 tf.command = ATA_CMD_ID_ATAPI;
1781 reason = "unsupported class";
1785 tf.protocol = ATA_PROT_PIO;
1787 /* Some devices choke if TF registers contain garbage. Make
1788 * sure those are properly initialized.
1790 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
1792 /* Device presence detection is unreliable on some
1793 * controllers. Always poll IDENTIFY if available.
1795 tf.flags |= ATA_TFLAG_POLLING;
1797 if (ap->ops->read_id)
1798 err_mask = ap->ops->read_id(dev, &tf, (__le16 *)id);
1800 err_mask = ata_do_dev_read_id(dev, &tf, (__le16 *)id);
1803 if (err_mask & AC_ERR_NODEV_HINT) {
1804 ata_dev_dbg(dev, "NODEV after polling detection\n");
1810 "IDENTIFY failed on device w/ SEMB sig, disabled\n");
1811 /* SEMB is not supported yet */
1812 *p_class = ATA_DEV_SEMB_UNSUP;
1816 if ((err_mask == AC_ERR_DEV) && (tf.error & ATA_ABORTED)) {
1817 /* Device or controller might have reported
1818 * the wrong device class. Give a shot at the
1819 * other IDENTIFY if the current one is
1820 * aborted by the device.
1825 if (class == ATA_DEV_ATA)
1826 class = ATA_DEV_ATAPI;
1828 class = ATA_DEV_ATA;
1832 /* Control reaches here iff the device aborted
1833 * both flavors of IDENTIFYs which happens
1834 * sometimes with phantom devices.
1837 "both IDENTIFYs aborted, assuming NODEV\n");
1842 reason = "I/O error";
1846 if (dev->horkage & ATA_HORKAGE_DUMP_ID) {
1847 ata_dev_info(dev, "dumping IDENTIFY data, "
1848 "class=%d may_fallback=%d tried_spinup=%d\n",
1849 class, may_fallback, tried_spinup);
1850 print_hex_dump(KERN_INFO, "", DUMP_PREFIX_OFFSET,
1851 16, 2, id, ATA_ID_WORDS * sizeof(*id), true);
1854 /* Falling back doesn't make sense if ID data was read
1855 * successfully at least once.
1859 swap_buf_le16(id, ATA_ID_WORDS);
1863 reason = "device reports invalid type";
1865 if (class == ATA_DEV_ATA || class == ATA_DEV_ZAC) {
1866 if (!ata_id_is_ata(id) && !ata_id_is_cfa(id))
1868 if (ap->host->flags & ATA_HOST_IGNORE_ATA &&
1869 ata_id_is_ata(id)) {
1871 "host indicates ignore ATA devices, ignored\n");
1875 if (ata_id_is_ata(id))
1879 if (!tried_spinup && (id[2] == 0x37c8 || id[2] == 0x738c)) {
1882 * Drive powered-up in standby mode, and requires a specific
1883 * SET_FEATURES spin-up subcommand before it will accept
1884 * anything other than the original IDENTIFY command.
1886 err_mask = ata_dev_set_feature(dev, SETFEATURES_SPINUP, 0);
1887 if (err_mask && id[2] != 0x738c) {
1889 reason = "SPINUP failed";
1893 * If the drive initially returned incomplete IDENTIFY info,
1894 * we now must reissue the IDENTIFY command.
1896 if (id[2] == 0x37c8)
1900 if ((flags & ATA_READID_POSTRESET) &&
1901 (class == ATA_DEV_ATA || class == ATA_DEV_ZAC)) {
1903 * The exact sequence expected by certain pre-ATA4 drives is:
1905 * IDENTIFY (optional in early ATA)
1906 * INITIALIZE DEVICE PARAMETERS (later IDE and ATA)
1908 * Some drives were very specific about that exact sequence.
1910 * Note that ATA4 says lba is mandatory so the second check
1911 * should never trigger.
1913 if (ata_id_major_version(id) < 4 || !ata_id_has_lba(id)) {
1914 err_mask = ata_dev_init_params(dev, id[3], id[6]);
1917 reason = "INIT_DEV_PARAMS failed";
1921 /* current CHS translation info (id[53-58]) might be
1922 * changed. reread the identify device info.
1924 flags &= ~ATA_READID_POSTRESET;
1934 ata_dev_warn(dev, "failed to IDENTIFY (%s, err_mask=0x%x)\n",
1940 * ata_read_log_page - read a specific log page
1941 * @dev: target device
1943 * @page: page to read
1944 * @buf: buffer to store read page
1945 * @sectors: number of sectors to read
1947 * Read log page using READ_LOG_EXT command.
1950 * Kernel thread context (may sleep).
1953 * 0 on success, AC_ERR_* mask otherwise.
1955 unsigned int ata_read_log_page(struct ata_device *dev, u8 log,
1956 u8 page, void *buf, unsigned int sectors)
1958 unsigned long ap_flags = dev->link->ap->flags;
1959 struct ata_taskfile tf;
1960 unsigned int err_mask;
1963 ata_dev_dbg(dev, "read log page - log 0x%x, page 0x%x\n", log, page);
1966 * Return error without actually issuing the command on controllers
1967 * which e.g. lockup on a read log page.
1969 if (ap_flags & ATA_FLAG_NO_LOG_PAGE)
1973 ata_tf_init(dev, &tf);
1974 if (ata_dma_enabled(dev) && ata_id_has_read_log_dma_ext(dev->id) &&
1975 !(dev->horkage & ATA_HORKAGE_NO_DMA_LOG)) {
1976 tf.command = ATA_CMD_READ_LOG_DMA_EXT;
1977 tf.protocol = ATA_PROT_DMA;
1980 tf.command = ATA_CMD_READ_LOG_EXT;
1981 tf.protocol = ATA_PROT_PIO;
1987 tf.hob_nsect = sectors >> 8;
1988 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_LBA48 | ATA_TFLAG_DEVICE;
1990 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_FROM_DEVICE,
1991 buf, sectors * ATA_SECT_SIZE, 0);
1995 dev->horkage |= ATA_HORKAGE_NO_DMA_LOG;
1999 "Read log 0x%02x page 0x%02x failed, Emask 0x%x\n",
2000 (unsigned int)log, (unsigned int)page, err_mask);
2006 static bool ata_log_supported(struct ata_device *dev, u8 log)
2008 struct ata_port *ap = dev->link->ap;
2010 if (dev->horkage & ATA_HORKAGE_NO_LOG_DIR)
2013 if (ata_read_log_page(dev, ATA_LOG_DIRECTORY, 0, ap->sector_buf, 1))
2015 return get_unaligned_le16(&ap->sector_buf[log * 2]) ? true : false;
2018 static bool ata_identify_page_supported(struct ata_device *dev, u8 page)
2020 struct ata_port *ap = dev->link->ap;
2021 unsigned int err, i;
2023 if (dev->horkage & ATA_HORKAGE_NO_ID_DEV_LOG)
2026 if (!ata_log_supported(dev, ATA_LOG_IDENTIFY_DEVICE)) {
2028 * IDENTIFY DEVICE data log is defined as mandatory starting
2029 * with ACS-3 (ATA version 10). Warn about the missing log
2030 * for drives which implement this ATA level or above.
2032 if (ata_id_major_version(dev->id) >= 10)
2034 "ATA Identify Device Log not supported\n");
2035 dev->horkage |= ATA_HORKAGE_NO_ID_DEV_LOG;
2040 * Read IDENTIFY DEVICE data log, page 0, to figure out if the page is
2043 err = ata_read_log_page(dev, ATA_LOG_IDENTIFY_DEVICE, 0, ap->sector_buf,
2048 for (i = 0; i < ap->sector_buf[8]; i++) {
2049 if (ap->sector_buf[9 + i] == page)
2056 static int ata_do_link_spd_horkage(struct ata_device *dev)
2058 struct ata_link *plink = ata_dev_phys_link(dev);
2059 u32 target, target_limit;
2061 if (!sata_scr_valid(plink))
2064 if (dev->horkage & ATA_HORKAGE_1_5_GBPS)
2069 target_limit = (1 << target) - 1;
2071 /* if already on stricter limit, no need to push further */
2072 if (plink->sata_spd_limit <= target_limit)
2075 plink->sata_spd_limit = target_limit;
2077 /* Request another EH round by returning -EAGAIN if link is
2078 * going faster than the target speed. Forward progress is
2079 * guaranteed by setting sata_spd_limit to target_limit above.
2081 if (plink->sata_spd > target) {
2082 ata_dev_info(dev, "applying link speed limit horkage to %s\n",
2083 sata_spd_string(target));
2089 static inline u8 ata_dev_knobble(struct ata_device *dev)
2091 struct ata_port *ap = dev->link->ap;
2093 if (ata_dev_blacklisted(dev) & ATA_HORKAGE_BRIDGE_OK)
2096 return ((ap->cbl == ATA_CBL_SATA) && (!ata_id_is_sata(dev->id)));
2099 static void ata_dev_config_ncq_send_recv(struct ata_device *dev)
2101 struct ata_port *ap = dev->link->ap;
2102 unsigned int err_mask;
2104 if (!ata_log_supported(dev, ATA_LOG_NCQ_SEND_RECV)) {
2105 ata_dev_warn(dev, "NCQ Send/Recv Log not supported\n");
2108 err_mask = ata_read_log_page(dev, ATA_LOG_NCQ_SEND_RECV,
2109 0, ap->sector_buf, 1);
2111 u8 *cmds = dev->ncq_send_recv_cmds;
2113 dev->flags |= ATA_DFLAG_NCQ_SEND_RECV;
2114 memcpy(cmds, ap->sector_buf, ATA_LOG_NCQ_SEND_RECV_SIZE);
2116 if (dev->horkage & ATA_HORKAGE_NO_NCQ_TRIM) {
2117 ata_dev_dbg(dev, "disabling queued TRIM support\n");
2118 cmds[ATA_LOG_NCQ_SEND_RECV_DSM_OFFSET] &=
2119 ~ATA_LOG_NCQ_SEND_RECV_DSM_TRIM;
2124 static void ata_dev_config_ncq_non_data(struct ata_device *dev)
2126 struct ata_port *ap = dev->link->ap;
2127 unsigned int err_mask;
2129 if (!ata_log_supported(dev, ATA_LOG_NCQ_NON_DATA)) {
2131 "NCQ Send/Recv Log not supported\n");
2134 err_mask = ata_read_log_page(dev, ATA_LOG_NCQ_NON_DATA,
2135 0, ap->sector_buf, 1);
2137 u8 *cmds = dev->ncq_non_data_cmds;
2139 memcpy(cmds, ap->sector_buf, ATA_LOG_NCQ_NON_DATA_SIZE);
2143 static void ata_dev_config_ncq_prio(struct ata_device *dev)
2145 struct ata_port *ap = dev->link->ap;
2146 unsigned int err_mask;
2148 if (!ata_identify_page_supported(dev, ATA_LOG_SATA_SETTINGS))
2151 err_mask = ata_read_log_page(dev,
2152 ATA_LOG_IDENTIFY_DEVICE,
2153 ATA_LOG_SATA_SETTINGS,
2159 if (!(ap->sector_buf[ATA_LOG_NCQ_PRIO_OFFSET] & BIT(3)))
2162 dev->flags |= ATA_DFLAG_NCQ_PRIO;
2167 dev->flags &= ~ATA_DFLAG_NCQ_PRIO_ENABLE;
2168 dev->flags &= ~ATA_DFLAG_NCQ_PRIO;
2171 static bool ata_dev_check_adapter(struct ata_device *dev,
2172 unsigned short vendor_id)
2174 struct pci_dev *pcidev = NULL;
2175 struct device *parent_dev = NULL;
2177 for (parent_dev = dev->tdev.parent; parent_dev != NULL;
2178 parent_dev = parent_dev->parent) {
2179 if (dev_is_pci(parent_dev)) {
2180 pcidev = to_pci_dev(parent_dev);
2181 if (pcidev->vendor == vendor_id)
2190 static int ata_dev_config_ncq(struct ata_device *dev,
2191 char *desc, size_t desc_sz)
2193 struct ata_port *ap = dev->link->ap;
2194 int hdepth = 0, ddepth = ata_id_queue_depth(dev->id);
2195 unsigned int err_mask;
2198 if (!ata_id_has_ncq(dev->id)) {
2202 if (!IS_ENABLED(CONFIG_SATA_HOST))
2204 if (dev->horkage & ATA_HORKAGE_NONCQ) {
2205 snprintf(desc, desc_sz, "NCQ (not used)");
2209 if (dev->horkage & ATA_HORKAGE_NO_NCQ_ON_ATI &&
2210 ata_dev_check_adapter(dev, PCI_VENDOR_ID_ATI)) {
2211 snprintf(desc, desc_sz, "NCQ (not used)");
2215 if (ap->flags & ATA_FLAG_NCQ) {
2216 hdepth = min(ap->scsi_host->can_queue, ATA_MAX_QUEUE);
2217 dev->flags |= ATA_DFLAG_NCQ;
2220 if (!(dev->horkage & ATA_HORKAGE_BROKEN_FPDMA_AA) &&
2221 (ap->flags & ATA_FLAG_FPDMA_AA) &&
2222 ata_id_has_fpdma_aa(dev->id)) {
2223 err_mask = ata_dev_set_feature(dev, SETFEATURES_SATA_ENABLE,
2227 "failed to enable AA (error_mask=0x%x)\n",
2229 if (err_mask != AC_ERR_DEV) {
2230 dev->horkage |= ATA_HORKAGE_BROKEN_FPDMA_AA;
2237 if (hdepth >= ddepth)
2238 snprintf(desc, desc_sz, "NCQ (depth %d)%s", ddepth, aa_desc);
2240 snprintf(desc, desc_sz, "NCQ (depth %d/%d)%s", hdepth,
2243 if ((ap->flags & ATA_FLAG_FPDMA_AUX)) {
2244 if (ata_id_has_ncq_send_and_recv(dev->id))
2245 ata_dev_config_ncq_send_recv(dev);
2246 if (ata_id_has_ncq_non_data(dev->id))
2247 ata_dev_config_ncq_non_data(dev);
2248 if (ata_id_has_ncq_prio(dev->id))
2249 ata_dev_config_ncq_prio(dev);
2255 static void ata_dev_config_sense_reporting(struct ata_device *dev)
2257 unsigned int err_mask;
2259 if (!ata_id_has_sense_reporting(dev->id))
2262 if (ata_id_sense_reporting_enabled(dev->id))
2265 err_mask = ata_dev_set_feature(dev, SETFEATURE_SENSE_DATA, 0x1);
2268 "failed to enable Sense Data Reporting, Emask 0x%x\n",
2273 static void ata_dev_config_zac(struct ata_device *dev)
2275 struct ata_port *ap = dev->link->ap;
2276 unsigned int err_mask;
2277 u8 *identify_buf = ap->sector_buf;
2279 dev->zac_zones_optimal_open = U32_MAX;
2280 dev->zac_zones_optimal_nonseq = U32_MAX;
2281 dev->zac_zones_max_open = U32_MAX;
2284 * Always set the 'ZAC' flag for Host-managed devices.
2286 if (dev->class == ATA_DEV_ZAC)
2287 dev->flags |= ATA_DFLAG_ZAC;
2288 else if (ata_id_zoned_cap(dev->id) == 0x01)
2290 * Check for host-aware devices.
2292 dev->flags |= ATA_DFLAG_ZAC;
2294 if (!(dev->flags & ATA_DFLAG_ZAC))
2297 if (!ata_identify_page_supported(dev, ATA_LOG_ZONED_INFORMATION)) {
2299 "ATA Zoned Information Log not supported\n");
2304 * Read IDENTIFY DEVICE data log, page 9 (Zoned-device information)
2306 err_mask = ata_read_log_page(dev, ATA_LOG_IDENTIFY_DEVICE,
2307 ATA_LOG_ZONED_INFORMATION,
2310 u64 zoned_cap, opt_open, opt_nonseq, max_open;
2312 zoned_cap = get_unaligned_le64(&identify_buf[8]);
2313 if ((zoned_cap >> 63))
2314 dev->zac_zoned_cap = (zoned_cap & 1);
2315 opt_open = get_unaligned_le64(&identify_buf[24]);
2316 if ((opt_open >> 63))
2317 dev->zac_zones_optimal_open = (u32)opt_open;
2318 opt_nonseq = get_unaligned_le64(&identify_buf[32]);
2319 if ((opt_nonseq >> 63))
2320 dev->zac_zones_optimal_nonseq = (u32)opt_nonseq;
2321 max_open = get_unaligned_le64(&identify_buf[40]);
2322 if ((max_open >> 63))
2323 dev->zac_zones_max_open = (u32)max_open;
2327 static void ata_dev_config_trusted(struct ata_device *dev)
2329 struct ata_port *ap = dev->link->ap;
2333 if (!ata_id_has_trusted(dev->id))
2336 if (!ata_identify_page_supported(dev, ATA_LOG_SECURITY)) {
2338 "Security Log not supported\n");
2342 err = ata_read_log_page(dev, ATA_LOG_IDENTIFY_DEVICE, ATA_LOG_SECURITY,
2347 trusted_cap = get_unaligned_le64(&ap->sector_buf[40]);
2348 if (!(trusted_cap & (1ULL << 63))) {
2350 "Trusted Computing capability qword not valid!\n");
2354 if (trusted_cap & (1 << 0))
2355 dev->flags |= ATA_DFLAG_TRUSTED;
2358 static int ata_dev_config_lba(struct ata_device *dev)
2360 const u16 *id = dev->id;
2361 const char *lba_desc;
2365 dev->flags |= ATA_DFLAG_LBA;
2367 if (ata_id_has_lba48(id)) {
2369 dev->flags |= ATA_DFLAG_LBA48;
2370 if (dev->n_sectors >= (1UL << 28) &&
2371 ata_id_has_flush_ext(id))
2372 dev->flags |= ATA_DFLAG_FLUSH_EXT;
2378 ret = ata_dev_config_ncq(dev, ncq_desc, sizeof(ncq_desc));
2380 /* print device info to dmesg */
2381 if (ata_dev_print_info(dev))
2383 "%llu sectors, multi %u: %s %s\n",
2384 (unsigned long long)dev->n_sectors,
2385 dev->multi_count, lba_desc, ncq_desc);
2390 static void ata_dev_config_chs(struct ata_device *dev)
2392 const u16 *id = dev->id;
2394 if (ata_id_current_chs_valid(id)) {
2395 /* Current CHS translation is valid. */
2396 dev->cylinders = id[54];
2397 dev->heads = id[55];
2398 dev->sectors = id[56];
2400 /* Default translation */
2401 dev->cylinders = id[1];
2403 dev->sectors = id[6];
2406 /* print device info to dmesg */
2407 if (ata_dev_print_info(dev))
2409 "%llu sectors, multi %u, CHS %u/%u/%u\n",
2410 (unsigned long long)dev->n_sectors,
2411 dev->multi_count, dev->cylinders,
2412 dev->heads, dev->sectors);
2415 static void ata_dev_config_devslp(struct ata_device *dev)
2417 u8 *sata_setting = dev->link->ap->sector_buf;
2418 unsigned int err_mask;
2422 * Check device sleep capability. Get DevSlp timing variables
2423 * from SATA Settings page of Identify Device Data Log.
2425 if (!ata_id_has_devslp(dev->id) ||
2426 !ata_identify_page_supported(dev, ATA_LOG_SATA_SETTINGS))
2429 err_mask = ata_read_log_page(dev,
2430 ATA_LOG_IDENTIFY_DEVICE,
2431 ATA_LOG_SATA_SETTINGS,
2436 dev->flags |= ATA_DFLAG_DEVSLP;
2437 for (i = 0; i < ATA_LOG_DEVSLP_SIZE; i++) {
2438 j = ATA_LOG_DEVSLP_OFFSET + i;
2439 dev->devslp_timing[i] = sata_setting[j];
2443 static void ata_dev_config_cpr(struct ata_device *dev)
2445 unsigned int err_mask;
2448 struct ata_cpr_log *cpr_log = NULL;
2449 u8 *desc, *buf = NULL;
2451 if (ata_id_major_version(dev->id) < 11 ||
2452 !ata_log_supported(dev, ATA_LOG_CONCURRENT_POSITIONING_RANGES))
2456 * Read the concurrent positioning ranges log (0x47). We can have at
2457 * most 255 32B range descriptors plus a 64B header.
2459 buf_len = (64 + 255 * 32 + 511) & ~511;
2460 buf = kzalloc(buf_len, GFP_KERNEL);
2464 err_mask = ata_read_log_page(dev, ATA_LOG_CONCURRENT_POSITIONING_RANGES,
2465 0, buf, buf_len >> 9);
2473 cpr_log = kzalloc(struct_size(cpr_log, cpr, nr_cpr), GFP_KERNEL);
2477 cpr_log->nr_cpr = nr_cpr;
2479 for (i = 0; i < nr_cpr; i++, desc += 32) {
2480 cpr_log->cpr[i].num = desc[0];
2481 cpr_log->cpr[i].num_storage_elements = desc[1];
2482 cpr_log->cpr[i].start_lba = get_unaligned_le64(&desc[8]);
2483 cpr_log->cpr[i].num_lbas = get_unaligned_le64(&desc[16]);
2487 swap(dev->cpr_log, cpr_log);
2492 static void ata_dev_print_features(struct ata_device *dev)
2494 if (!(dev->flags & ATA_DFLAG_FEATURES_MASK))
2498 "Features:%s%s%s%s%s%s\n",
2499 dev->flags & ATA_DFLAG_TRUSTED ? " Trust" : "",
2500 dev->flags & ATA_DFLAG_DA ? " Dev-Attention" : "",
2501 dev->flags & ATA_DFLAG_DEVSLP ? " Dev-Sleep" : "",
2502 dev->flags & ATA_DFLAG_NCQ_SEND_RECV ? " NCQ-sndrcv" : "",
2503 dev->flags & ATA_DFLAG_NCQ_PRIO ? " NCQ-prio" : "",
2504 dev->cpr_log ? " CPR" : "");
2508 * ata_dev_configure - Configure the specified ATA/ATAPI device
2509 * @dev: Target device to configure
2511 * Configure @dev according to @dev->id. Generic and low-level
2512 * driver specific fixups are also applied.
2515 * Kernel thread context (may sleep)
2518 * 0 on success, -errno otherwise
2520 int ata_dev_configure(struct ata_device *dev)
2522 struct ata_port *ap = dev->link->ap;
2523 bool print_info = ata_dev_print_info(dev);
2524 const u16 *id = dev->id;
2525 unsigned long xfer_mask;
2526 unsigned int err_mask;
2527 char revbuf[7]; /* XYZ-99\0 */
2528 char fwrevbuf[ATA_ID_FW_REV_LEN+1];
2529 char modelbuf[ATA_ID_PROD_LEN+1];
2532 if (!ata_dev_enabled(dev)) {
2533 ata_dev_dbg(dev, "no device\n");
2538 dev->horkage |= ata_dev_blacklisted(dev);
2539 ata_force_horkage(dev);
2541 if (dev->horkage & ATA_HORKAGE_DISABLE) {
2542 ata_dev_info(dev, "unsupported device, disabling\n");
2543 ata_dev_disable(dev);
2547 if ((!atapi_enabled || (ap->flags & ATA_FLAG_NO_ATAPI)) &&
2548 dev->class == ATA_DEV_ATAPI) {
2549 ata_dev_warn(dev, "WARNING: ATAPI is %s, device ignored\n",
2550 atapi_enabled ? "not supported with this driver"
2552 ata_dev_disable(dev);
2556 rc = ata_do_link_spd_horkage(dev);
2560 /* some WD SATA-1 drives have issues with LPM, turn on NOLPM for them */
2561 if ((dev->horkage & ATA_HORKAGE_WD_BROKEN_LPM) &&
2562 (id[ATA_ID_SATA_CAPABILITY] & 0xe) == 0x2)
2563 dev->horkage |= ATA_HORKAGE_NOLPM;
2565 if (ap->flags & ATA_FLAG_NO_LPM)
2566 dev->horkage |= ATA_HORKAGE_NOLPM;
2568 if (dev->horkage & ATA_HORKAGE_NOLPM) {
2569 ata_dev_warn(dev, "LPM support broken, forcing max_power\n");
2570 dev->link->ap->target_lpm_policy = ATA_LPM_MAX_POWER;
2573 /* let ACPI work its magic */
2574 rc = ata_acpi_on_devcfg(dev);
2578 /* massage HPA, do it early as it might change IDENTIFY data */
2579 rc = ata_hpa_resize(dev);
2583 /* print device capabilities */
2585 "%s: cfg 49:%04x 82:%04x 83:%04x 84:%04x "
2586 "85:%04x 86:%04x 87:%04x 88:%04x\n",
2588 id[49], id[82], id[83], id[84],
2589 id[85], id[86], id[87], id[88]);
2591 /* initialize to-be-configured parameters */
2592 dev->flags &= ~ATA_DFLAG_CFG_MASK;
2593 dev->max_sectors = 0;
2599 dev->multi_count = 0;
2602 * common ATA, ATAPI feature tests
2605 /* find max transfer mode; for printk only */
2606 xfer_mask = ata_id_xfermask(id);
2608 ata_dump_id(dev, id);
2610 /* SCSI only uses 4-char revisions, dump full 8 chars from ATA */
2611 ata_id_c_string(dev->id, fwrevbuf, ATA_ID_FW_REV,
2614 ata_id_c_string(dev->id, modelbuf, ATA_ID_PROD,
2617 /* ATA-specific feature tests */
2618 if (dev->class == ATA_DEV_ATA || dev->class == ATA_DEV_ZAC) {
2619 if (ata_id_is_cfa(id)) {
2620 /* CPRM may make this media unusable */
2621 if (id[ATA_ID_CFA_KEY_MGMT] & 1)
2623 "supports DRM functions and may not be fully accessible\n");
2624 snprintf(revbuf, 7, "CFA");
2626 snprintf(revbuf, 7, "ATA-%d", ata_id_major_version(id));
2627 /* Warn the user if the device has TPM extensions */
2628 if (ata_id_has_tpm(id))
2630 "supports DRM functions and may not be fully accessible\n");
2633 dev->n_sectors = ata_id_n_sectors(id);
2635 /* get current R/W Multiple count setting */
2636 if ((dev->id[47] >> 8) == 0x80 && (dev->id[59] & 0x100)) {
2637 unsigned int max = dev->id[47] & 0xff;
2638 unsigned int cnt = dev->id[59] & 0xff;
2639 /* only recognize/allow powers of two here */
2640 if (is_power_of_2(max) && is_power_of_2(cnt))
2642 dev->multi_count = cnt;
2645 /* print device info to dmesg */
2647 ata_dev_info(dev, "%s: %s, %s, max %s\n",
2648 revbuf, modelbuf, fwrevbuf,
2649 ata_mode_string(xfer_mask));
2651 if (ata_id_has_lba(id)) {
2652 rc = ata_dev_config_lba(dev);
2656 ata_dev_config_chs(dev);
2659 ata_dev_config_devslp(dev);
2660 ata_dev_config_sense_reporting(dev);
2661 ata_dev_config_zac(dev);
2662 ata_dev_config_trusted(dev);
2663 ata_dev_config_cpr(dev);
2667 ata_dev_print_features(dev);
2670 /* ATAPI-specific feature tests */
2671 else if (dev->class == ATA_DEV_ATAPI) {
2672 const char *cdb_intr_string = "";
2673 const char *atapi_an_string = "";
2674 const char *dma_dir_string = "";
2677 rc = atapi_cdb_len(id);
2678 if ((rc < 12) || (rc > ATAPI_CDB_LEN)) {
2679 ata_dev_warn(dev, "unsupported CDB len %d\n", rc);
2683 dev->cdb_len = (unsigned int) rc;
2685 /* Enable ATAPI AN if both the host and device have
2686 * the support. If PMP is attached, SNTF is required
2687 * to enable ATAPI AN to discern between PHY status
2688 * changed notifications and ATAPI ANs.
2691 (ap->flags & ATA_FLAG_AN) && ata_id_has_atapi_AN(id) &&
2692 (!sata_pmp_attached(ap) ||
2693 sata_scr_read(&ap->link, SCR_NOTIFICATION, &sntf) == 0)) {
2694 /* issue SET feature command to turn this on */
2695 err_mask = ata_dev_set_feature(dev,
2696 SETFEATURES_SATA_ENABLE, SATA_AN);
2699 "failed to enable ATAPI AN (err_mask=0x%x)\n",
2702 dev->flags |= ATA_DFLAG_AN;
2703 atapi_an_string = ", ATAPI AN";
2707 if (ata_id_cdb_intr(dev->id)) {
2708 dev->flags |= ATA_DFLAG_CDB_INTR;
2709 cdb_intr_string = ", CDB intr";
2712 if (atapi_dmadir || (dev->horkage & ATA_HORKAGE_ATAPI_DMADIR) || atapi_id_dmadir(dev->id)) {
2713 dev->flags |= ATA_DFLAG_DMADIR;
2714 dma_dir_string = ", DMADIR";
2717 if (ata_id_has_da(dev->id)) {
2718 dev->flags |= ATA_DFLAG_DA;
2722 /* print device info to dmesg */
2725 "ATAPI: %s, %s, max %s%s%s%s\n",
2727 ata_mode_string(xfer_mask),
2728 cdb_intr_string, atapi_an_string,
2732 /* determine max_sectors */
2733 dev->max_sectors = ATA_MAX_SECTORS;
2734 if (dev->flags & ATA_DFLAG_LBA48)
2735 dev->max_sectors = ATA_MAX_SECTORS_LBA48;
2737 /* Limit PATA drive on SATA cable bridge transfers to udma5,
2739 if (ata_dev_knobble(dev)) {
2741 ata_dev_info(dev, "applying bridge limits\n");
2742 dev->udma_mask &= ATA_UDMA5;
2743 dev->max_sectors = ATA_MAX_SECTORS;
2746 if ((dev->class == ATA_DEV_ATAPI) &&
2747 (atapi_command_packet_set(id) == TYPE_TAPE)) {
2748 dev->max_sectors = ATA_MAX_SECTORS_TAPE;
2749 dev->horkage |= ATA_HORKAGE_STUCK_ERR;
2752 if (dev->horkage & ATA_HORKAGE_MAX_SEC_128)
2753 dev->max_sectors = min_t(unsigned int, ATA_MAX_SECTORS_128,
2756 if (dev->horkage & ATA_HORKAGE_MAX_SEC_1024)
2757 dev->max_sectors = min_t(unsigned int, ATA_MAX_SECTORS_1024,
2760 if (dev->horkage & ATA_HORKAGE_MAX_SEC_LBA48)
2761 dev->max_sectors = ATA_MAX_SECTORS_LBA48;
2763 if (ap->ops->dev_config)
2764 ap->ops->dev_config(dev);
2766 if (dev->horkage & ATA_HORKAGE_DIAGNOSTIC) {
2767 /* Let the user know. We don't want to disallow opens for
2768 rescue purposes, or in case the vendor is just a blithering
2769 idiot. Do this after the dev_config call as some controllers
2770 with buggy firmware may want to avoid reporting false device
2775 "Drive reports diagnostics failure. This may indicate a drive\n");
2777 "fault or invalid emulation. Contact drive vendor for information.\n");
2781 if ((dev->horkage & ATA_HORKAGE_FIRMWARE_WARN) && print_info) {
2782 ata_dev_warn(dev, "WARNING: device requires firmware update to be fully functional\n");
2783 ata_dev_warn(dev, " contact the vendor or visit http://ata.wiki.kernel.org\n");
2793 * ata_cable_40wire - return 40 wire cable type
2796 * Helper method for drivers which want to hardwire 40 wire cable
2800 int ata_cable_40wire(struct ata_port *ap)
2802 return ATA_CBL_PATA40;
2804 EXPORT_SYMBOL_GPL(ata_cable_40wire);
2807 * ata_cable_80wire - return 80 wire cable type
2810 * Helper method for drivers which want to hardwire 80 wire cable
2814 int ata_cable_80wire(struct ata_port *ap)
2816 return ATA_CBL_PATA80;
2818 EXPORT_SYMBOL_GPL(ata_cable_80wire);
2821 * ata_cable_unknown - return unknown PATA cable.
2824 * Helper method for drivers which have no PATA cable detection.
2827 int ata_cable_unknown(struct ata_port *ap)
2829 return ATA_CBL_PATA_UNK;
2831 EXPORT_SYMBOL_GPL(ata_cable_unknown);
2834 * ata_cable_ignore - return ignored PATA cable.
2837 * Helper method for drivers which don't use cable type to limit
2840 int ata_cable_ignore(struct ata_port *ap)
2842 return ATA_CBL_PATA_IGN;
2844 EXPORT_SYMBOL_GPL(ata_cable_ignore);
2847 * ata_cable_sata - return SATA cable type
2850 * Helper method for drivers which have SATA cables
2853 int ata_cable_sata(struct ata_port *ap)
2855 return ATA_CBL_SATA;
2857 EXPORT_SYMBOL_GPL(ata_cable_sata);
2860 * ata_bus_probe - Reset and probe ATA bus
2863 * Master ATA bus probing function. Initiates a hardware-dependent
2864 * bus reset, then attempts to identify any devices found on
2868 * PCI/etc. bus probe sem.
2871 * Zero on success, negative errno otherwise.
2874 int ata_bus_probe(struct ata_port *ap)
2876 unsigned int classes[ATA_MAX_DEVICES];
2877 int tries[ATA_MAX_DEVICES];
2879 struct ata_device *dev;
2881 ata_for_each_dev(dev, &ap->link, ALL)
2882 tries[dev->devno] = ATA_PROBE_MAX_TRIES;
2885 ata_for_each_dev(dev, &ap->link, ALL) {
2886 /* If we issue an SRST then an ATA drive (not ATAPI)
2887 * may change configuration and be in PIO0 timing. If
2888 * we do a hard reset (or are coming from power on)
2889 * this is true for ATA or ATAPI. Until we've set a
2890 * suitable controller mode we should not touch the
2891 * bus as we may be talking too fast.
2893 dev->pio_mode = XFER_PIO_0;
2894 dev->dma_mode = 0xff;
2896 /* If the controller has a pio mode setup function
2897 * then use it to set the chipset to rights. Don't
2898 * touch the DMA setup as that will be dealt with when
2899 * configuring devices.
2901 if (ap->ops->set_piomode)
2902 ap->ops->set_piomode(ap, dev);
2905 /* reset and determine device classes */
2906 ap->ops->phy_reset(ap);
2908 ata_for_each_dev(dev, &ap->link, ALL) {
2909 if (dev->class != ATA_DEV_UNKNOWN)
2910 classes[dev->devno] = dev->class;
2912 classes[dev->devno] = ATA_DEV_NONE;
2914 dev->class = ATA_DEV_UNKNOWN;
2917 /* read IDENTIFY page and configure devices. We have to do the identify
2918 specific sequence bass-ackwards so that PDIAG- is released by
2921 ata_for_each_dev(dev, &ap->link, ALL_REVERSE) {
2922 if (tries[dev->devno])
2923 dev->class = classes[dev->devno];
2925 if (!ata_dev_enabled(dev))
2928 rc = ata_dev_read_id(dev, &dev->class, ATA_READID_POSTRESET,
2934 /* Now ask for the cable type as PDIAG- should have been released */
2935 if (ap->ops->cable_detect)
2936 ap->cbl = ap->ops->cable_detect(ap);
2938 /* We may have SATA bridge glue hiding here irrespective of
2939 * the reported cable types and sensed types. When SATA
2940 * drives indicate we have a bridge, we don't know which end
2941 * of the link the bridge is which is a problem.
2943 ata_for_each_dev(dev, &ap->link, ENABLED)
2944 if (ata_id_is_sata(dev->id))
2945 ap->cbl = ATA_CBL_SATA;
2947 /* After the identify sequence we can now set up the devices. We do
2948 this in the normal order so that the user doesn't get confused */
2950 ata_for_each_dev(dev, &ap->link, ENABLED) {
2951 ap->link.eh_context.i.flags |= ATA_EHI_PRINTINFO;
2952 rc = ata_dev_configure(dev);
2953 ap->link.eh_context.i.flags &= ~ATA_EHI_PRINTINFO;
2958 /* configure transfer mode */
2959 rc = ata_set_mode(&ap->link, &dev);
2963 ata_for_each_dev(dev, &ap->link, ENABLED)
2969 tries[dev->devno]--;
2973 /* eeek, something went very wrong, give up */
2974 tries[dev->devno] = 0;
2978 /* give it just one more chance */
2979 tries[dev->devno] = min(tries[dev->devno], 1);
2982 if (tries[dev->devno] == 1) {
2983 /* This is the last chance, better to slow
2984 * down than lose it.
2986 sata_down_spd_limit(&ap->link, 0);
2987 ata_down_xfermask_limit(dev, ATA_DNXFER_PIO);
2991 if (!tries[dev->devno])
2992 ata_dev_disable(dev);
2998 * sata_print_link_status - Print SATA link status
2999 * @link: SATA link to printk link status about
3001 * This function prints link speed and status of a SATA link.
3006 static void sata_print_link_status(struct ata_link *link)
3008 u32 sstatus, scontrol, tmp;
3010 if (sata_scr_read(link, SCR_STATUS, &sstatus))
3012 sata_scr_read(link, SCR_CONTROL, &scontrol);
3014 if (ata_phys_link_online(link)) {
3015 tmp = (sstatus >> 4) & 0xf;
3016 ata_link_info(link, "SATA link up %s (SStatus %X SControl %X)\n",
3017 sata_spd_string(tmp), sstatus, scontrol);
3019 ata_link_info(link, "SATA link down (SStatus %X SControl %X)\n",
3025 * ata_dev_pair - return other device on cable
3028 * Obtain the other device on the same cable, or if none is
3029 * present NULL is returned
3032 struct ata_device *ata_dev_pair(struct ata_device *adev)
3034 struct ata_link *link = adev->link;
3035 struct ata_device *pair = &link->device[1 - adev->devno];
3036 if (!ata_dev_enabled(pair))
3040 EXPORT_SYMBOL_GPL(ata_dev_pair);
3043 * sata_down_spd_limit - adjust SATA spd limit downward
3044 * @link: Link to adjust SATA spd limit for
3045 * @spd_limit: Additional limit
3047 * Adjust SATA spd limit of @link downward. Note that this
3048 * function only adjusts the limit. The change must be applied
3049 * using sata_set_spd().
3051 * If @spd_limit is non-zero, the speed is limited to equal to or
3052 * lower than @spd_limit if such speed is supported. If
3053 * @spd_limit is slower than any supported speed, only the lowest
3054 * supported speed is allowed.
3057 * Inherited from caller.
3060 * 0 on success, negative errno on failure
3062 int sata_down_spd_limit(struct ata_link *link, u32 spd_limit)
3064 u32 sstatus, spd, mask;
3067 if (!sata_scr_valid(link))
3070 /* If SCR can be read, use it to determine the current SPD.
3071 * If not, use cached value in link->sata_spd.
3073 rc = sata_scr_read(link, SCR_STATUS, &sstatus);
3074 if (rc == 0 && ata_sstatus_online(sstatus))
3075 spd = (sstatus >> 4) & 0xf;
3077 spd = link->sata_spd;
3079 mask = link->sata_spd_limit;
3083 /* unconditionally mask off the highest bit */
3084 bit = fls(mask) - 1;
3085 mask &= ~(1 << bit);
3088 * Mask off all speeds higher than or equal to the current one. At
3089 * this point, if current SPD is not available and we previously
3090 * recorded the link speed from SStatus, the driver has already
3091 * masked off the highest bit so mask should already be 1 or 0.
3092 * Otherwise, we should not force 1.5Gbps on a link where we have
3093 * not previously recorded speed from SStatus. Just return in this
3097 mask &= (1 << (spd - 1)) - 1;
3101 /* were we already at the bottom? */
3106 if (mask & ((1 << spd_limit) - 1))
3107 mask &= (1 << spd_limit) - 1;
3109 bit = ffs(mask) - 1;
3114 link->sata_spd_limit = mask;
3116 ata_link_warn(link, "limiting SATA link speed to %s\n",
3117 sata_spd_string(fls(mask)));
3122 #ifdef CONFIG_ATA_ACPI
3124 * ata_timing_cycle2mode - find xfer mode for the specified cycle duration
3125 * @xfer_shift: ATA_SHIFT_* value for transfer type to examine.
3126 * @cycle: cycle duration in ns
3128 * Return matching xfer mode for @cycle. The returned mode is of
3129 * the transfer type specified by @xfer_shift. If @cycle is too
3130 * slow for @xfer_shift, 0xff is returned. If @cycle is faster
3131 * than the fastest known mode, the fasted mode is returned.
3137 * Matching xfer_mode, 0xff if no match found.
3139 u8 ata_timing_cycle2mode(unsigned int xfer_shift, int cycle)
3141 u8 base_mode = 0xff, last_mode = 0xff;
3142 const struct ata_xfer_ent *ent;
3143 const struct ata_timing *t;
3145 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
3146 if (ent->shift == xfer_shift)
3147 base_mode = ent->base;
3149 for (t = ata_timing_find_mode(base_mode);
3150 t && ata_xfer_mode2shift(t->mode) == xfer_shift; t++) {
3151 unsigned short this_cycle;
3153 switch (xfer_shift) {
3155 case ATA_SHIFT_MWDMA:
3156 this_cycle = t->cycle;
3158 case ATA_SHIFT_UDMA:
3159 this_cycle = t->udma;
3165 if (cycle > this_cycle)
3168 last_mode = t->mode;
3176 * ata_down_xfermask_limit - adjust dev xfer masks downward
3177 * @dev: Device to adjust xfer masks
3178 * @sel: ATA_DNXFER_* selector
3180 * Adjust xfer masks of @dev downward. Note that this function
3181 * does not apply the change. Invoking ata_set_mode() afterwards
3182 * will apply the limit.
3185 * Inherited from caller.
3188 * 0 on success, negative errno on failure
3190 int ata_down_xfermask_limit(struct ata_device *dev, unsigned int sel)
3193 unsigned long orig_mask, xfer_mask;
3194 unsigned long pio_mask, mwdma_mask, udma_mask;
3197 quiet = !!(sel & ATA_DNXFER_QUIET);
3198 sel &= ~ATA_DNXFER_QUIET;
3200 xfer_mask = orig_mask = ata_pack_xfermask(dev->pio_mask,
3203 ata_unpack_xfermask(xfer_mask, &pio_mask, &mwdma_mask, &udma_mask);
3206 case ATA_DNXFER_PIO:
3207 highbit = fls(pio_mask) - 1;
3208 pio_mask &= ~(1 << highbit);
3211 case ATA_DNXFER_DMA:
3213 highbit = fls(udma_mask) - 1;
3214 udma_mask &= ~(1 << highbit);
3217 } else if (mwdma_mask) {
3218 highbit = fls(mwdma_mask) - 1;
3219 mwdma_mask &= ~(1 << highbit);
3225 case ATA_DNXFER_40C:
3226 udma_mask &= ATA_UDMA_MASK_40C;
3229 case ATA_DNXFER_FORCE_PIO0:
3232 case ATA_DNXFER_FORCE_PIO:
3241 xfer_mask &= ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask);
3243 if (!(xfer_mask & ATA_MASK_PIO) || xfer_mask == orig_mask)
3247 if (xfer_mask & (ATA_MASK_MWDMA | ATA_MASK_UDMA))
3248 snprintf(buf, sizeof(buf), "%s:%s",
3249 ata_mode_string(xfer_mask),
3250 ata_mode_string(xfer_mask & ATA_MASK_PIO));
3252 snprintf(buf, sizeof(buf), "%s",
3253 ata_mode_string(xfer_mask));
3255 ata_dev_warn(dev, "limiting speed to %s\n", buf);
3258 ata_unpack_xfermask(xfer_mask, &dev->pio_mask, &dev->mwdma_mask,
3264 static int ata_dev_set_mode(struct ata_device *dev)
3266 struct ata_port *ap = dev->link->ap;
3267 struct ata_eh_context *ehc = &dev->link->eh_context;
3268 const bool nosetxfer = dev->horkage & ATA_HORKAGE_NOSETXFER;
3269 const char *dev_err_whine = "";
3270 int ign_dev_err = 0;
3271 unsigned int err_mask = 0;
3274 dev->flags &= ~ATA_DFLAG_PIO;
3275 if (dev->xfer_shift == ATA_SHIFT_PIO)
3276 dev->flags |= ATA_DFLAG_PIO;
3278 if (nosetxfer && ap->flags & ATA_FLAG_SATA && ata_id_is_sata(dev->id))
3279 dev_err_whine = " (SET_XFERMODE skipped)";
3283 "NOSETXFER but PATA detected - can't "
3284 "skip SETXFER, might malfunction\n");
3285 err_mask = ata_dev_set_xfermode(dev);
3288 if (err_mask & ~AC_ERR_DEV)
3292 ehc->i.flags |= ATA_EHI_POST_SETMODE;
3293 rc = ata_dev_revalidate(dev, ATA_DEV_UNKNOWN, 0);
3294 ehc->i.flags &= ~ATA_EHI_POST_SETMODE;
3298 if (dev->xfer_shift == ATA_SHIFT_PIO) {
3299 /* Old CFA may refuse this command, which is just fine */
3300 if (ata_id_is_cfa(dev->id))
3302 /* Catch several broken garbage emulations plus some pre
3304 if (ata_id_major_version(dev->id) == 0 &&
3305 dev->pio_mode <= XFER_PIO_2)
3307 /* Some very old devices and some bad newer ones fail
3308 any kind of SET_XFERMODE request but support PIO0-2
3309 timings and no IORDY */
3310 if (!ata_id_has_iordy(dev->id) && dev->pio_mode <= XFER_PIO_2)
3313 /* Early MWDMA devices do DMA but don't allow DMA mode setting.
3314 Don't fail an MWDMA0 set IFF the device indicates it is in MWDMA0 */
3315 if (dev->xfer_shift == ATA_SHIFT_MWDMA &&
3316 dev->dma_mode == XFER_MW_DMA_0 &&
3317 (dev->id[63] >> 8) & 1)
3320 /* if the device is actually configured correctly, ignore dev err */
3321 if (dev->xfer_mode == ata_xfer_mask2mode(ata_id_xfermask(dev->id)))
3324 if (err_mask & AC_ERR_DEV) {
3328 dev_err_whine = " (device error ignored)";
3331 ata_dev_dbg(dev, "xfer_shift=%u, xfer_mode=0x%x\n",
3332 dev->xfer_shift, (int)dev->xfer_mode);
3334 if (!(ehc->i.flags & ATA_EHI_QUIET) ||
3335 ehc->i.flags & ATA_EHI_DID_HARDRESET)
3336 ata_dev_info(dev, "configured for %s%s\n",
3337 ata_mode_string(ata_xfer_mode2mask(dev->xfer_mode)),
3343 ata_dev_err(dev, "failed to set xfermode (err_mask=0x%x)\n", err_mask);
3348 * ata_do_set_mode - Program timings and issue SET FEATURES - XFER
3349 * @link: link on which timings will be programmed
3350 * @r_failed_dev: out parameter for failed device
3352 * Standard implementation of the function used to tune and set
3353 * ATA device disk transfer mode (PIO3, UDMA6, etc.). If
3354 * ata_dev_set_mode() fails, pointer to the failing device is
3355 * returned in @r_failed_dev.
3358 * PCI/etc. bus probe sem.
3361 * 0 on success, negative errno otherwise
3364 int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev)
3366 struct ata_port *ap = link->ap;
3367 struct ata_device *dev;
3368 int rc = 0, used_dma = 0, found = 0;
3370 /* step 1: calculate xfer_mask */
3371 ata_for_each_dev(dev, link, ENABLED) {
3372 unsigned long pio_mask, dma_mask;
3373 unsigned int mode_mask;
3375 mode_mask = ATA_DMA_MASK_ATA;
3376 if (dev->class == ATA_DEV_ATAPI)
3377 mode_mask = ATA_DMA_MASK_ATAPI;
3378 else if (ata_id_is_cfa(dev->id))
3379 mode_mask = ATA_DMA_MASK_CFA;
3381 ata_dev_xfermask(dev);
3382 ata_force_xfermask(dev);
3384 pio_mask = ata_pack_xfermask(dev->pio_mask, 0, 0);
3386 if (libata_dma_mask & mode_mask)
3387 dma_mask = ata_pack_xfermask(0, dev->mwdma_mask,
3392 dev->pio_mode = ata_xfer_mask2mode(pio_mask);
3393 dev->dma_mode = ata_xfer_mask2mode(dma_mask);
3396 if (ata_dma_enabled(dev))
3402 /* step 2: always set host PIO timings */
3403 ata_for_each_dev(dev, link, ENABLED) {
3404 if (dev->pio_mode == 0xff) {
3405 ata_dev_warn(dev, "no PIO support\n");
3410 dev->xfer_mode = dev->pio_mode;
3411 dev->xfer_shift = ATA_SHIFT_PIO;
3412 if (ap->ops->set_piomode)
3413 ap->ops->set_piomode(ap, dev);
3416 /* step 3: set host DMA timings */
3417 ata_for_each_dev(dev, link, ENABLED) {
3418 if (!ata_dma_enabled(dev))
3421 dev->xfer_mode = dev->dma_mode;
3422 dev->xfer_shift = ata_xfer_mode2shift(dev->dma_mode);
3423 if (ap->ops->set_dmamode)
3424 ap->ops->set_dmamode(ap, dev);
3427 /* step 4: update devices' xfer mode */
3428 ata_for_each_dev(dev, link, ENABLED) {
3429 rc = ata_dev_set_mode(dev);
3434 /* Record simplex status. If we selected DMA then the other
3435 * host channels are not permitted to do so.
3437 if (used_dma && (ap->host->flags & ATA_HOST_SIMPLEX))
3438 ap->host->simplex_claimed = ap;
3442 *r_failed_dev = dev;
3445 EXPORT_SYMBOL_GPL(ata_do_set_mode);
3448 * ata_wait_ready - wait for link to become ready
3449 * @link: link to be waited on
3450 * @deadline: deadline jiffies for the operation
3451 * @check_ready: callback to check link readiness
3453 * Wait for @link to become ready. @check_ready should return
3454 * positive number if @link is ready, 0 if it isn't, -ENODEV if
3455 * link doesn't seem to be occupied, other errno for other error
3458 * Transient -ENODEV conditions are allowed for
3459 * ATA_TMOUT_FF_WAIT.
3465 * 0 if @link is ready before @deadline; otherwise, -errno.
3467 int ata_wait_ready(struct ata_link *link, unsigned long deadline,
3468 int (*check_ready)(struct ata_link *link))
3470 unsigned long start = jiffies;
3471 unsigned long nodev_deadline;
3474 /* choose which 0xff timeout to use, read comment in libata.h */
3475 if (link->ap->host->flags & ATA_HOST_PARALLEL_SCAN)
3476 nodev_deadline = ata_deadline(start, ATA_TMOUT_FF_WAIT_LONG);
3478 nodev_deadline = ata_deadline(start, ATA_TMOUT_FF_WAIT);
3480 /* Slave readiness can't be tested separately from master. On
3481 * M/S emulation configuration, this function should be called
3482 * only on the master and it will handle both master and slave.
3484 WARN_ON(link == link->ap->slave_link);
3486 if (time_after(nodev_deadline, deadline))
3487 nodev_deadline = deadline;
3490 unsigned long now = jiffies;
3493 ready = tmp = check_ready(link);
3498 * -ENODEV could be transient. Ignore -ENODEV if link
3499 * is online. Also, some SATA devices take a long
3500 * time to clear 0xff after reset. Wait for
3501 * ATA_TMOUT_FF_WAIT[_LONG] on -ENODEV if link isn't
3504 * Note that some PATA controllers (pata_ali) explode
3505 * if status register is read more than once when
3506 * there's no device attached.
3508 if (ready == -ENODEV) {
3509 if (ata_link_online(link))
3511 else if ((link->ap->flags & ATA_FLAG_SATA) &&
3512 !ata_link_offline(link) &&
3513 time_before(now, nodev_deadline))
3519 if (time_after(now, deadline))
3522 if (!warned && time_after(now, start + 5 * HZ) &&
3523 (deadline - now > 3 * HZ)) {
3525 "link is slow to respond, please be patient "
3526 "(ready=%d)\n", tmp);
3530 ata_msleep(link->ap, 50);
3535 * ata_wait_after_reset - wait for link to become ready after reset
3536 * @link: link to be waited on
3537 * @deadline: deadline jiffies for the operation
3538 * @check_ready: callback to check link readiness
3540 * Wait for @link to become ready after reset.
3546 * 0 if @link is ready before @deadline; otherwise, -errno.
3548 int ata_wait_after_reset(struct ata_link *link, unsigned long deadline,
3549 int (*check_ready)(struct ata_link *link))
3551 ata_msleep(link->ap, ATA_WAIT_AFTER_RESET);
3553 return ata_wait_ready(link, deadline, check_ready);
3555 EXPORT_SYMBOL_GPL(ata_wait_after_reset);
3558 * ata_std_prereset - prepare for reset
3559 * @link: ATA link to be reset
3560 * @deadline: deadline jiffies for the operation
3562 * @link is about to be reset. Initialize it. Failure from
3563 * prereset makes libata abort whole reset sequence and give up
3564 * that port, so prereset should be best-effort. It does its
3565 * best to prepare for reset sequence but if things go wrong, it
3566 * should just whine, not fail.
3569 * Kernel thread context (may sleep)
3574 int ata_std_prereset(struct ata_link *link, unsigned long deadline)
3576 struct ata_port *ap = link->ap;
3577 struct ata_eh_context *ehc = &link->eh_context;
3578 const unsigned long *timing = sata_ehc_deb_timing(ehc);
3581 /* if we're about to do hardreset, nothing more to do */
3582 if (ehc->i.action & ATA_EH_HARDRESET)
3585 /* if SATA, resume link */
3586 if (ap->flags & ATA_FLAG_SATA) {
3587 rc = sata_link_resume(link, timing, deadline);
3588 /* whine about phy resume failure but proceed */
3589 if (rc && rc != -EOPNOTSUPP)
3591 "failed to resume link for reset (errno=%d)\n",
3595 /* no point in trying softreset on offline link */
3596 if (ata_phys_link_offline(link))
3597 ehc->i.action &= ~ATA_EH_SOFTRESET;
3601 EXPORT_SYMBOL_GPL(ata_std_prereset);
3604 * sata_std_hardreset - COMRESET w/o waiting or classification
3605 * @link: link to reset
3606 * @class: resulting class of attached device
3607 * @deadline: deadline jiffies for the operation
3609 * Standard SATA COMRESET w/o waiting or classification.
3612 * Kernel thread context (may sleep)
3615 * 0 if link offline, -EAGAIN if link online, -errno on errors.
3617 int sata_std_hardreset(struct ata_link *link, unsigned int *class,
3618 unsigned long deadline)
3620 const unsigned long *timing = sata_ehc_deb_timing(&link->eh_context);
3625 rc = sata_link_hardreset(link, timing, deadline, &online, NULL);
3626 return online ? -EAGAIN : rc;
3628 EXPORT_SYMBOL_GPL(sata_std_hardreset);
3631 * ata_std_postreset - standard postreset callback
3632 * @link: the target ata_link
3633 * @classes: classes of attached devices
3635 * This function is invoked after a successful reset. Note that
3636 * the device might have been reset more than once using
3637 * different reset methods before postreset is invoked.
3640 * Kernel thread context (may sleep)
3642 void ata_std_postreset(struct ata_link *link, unsigned int *classes)
3646 /* reset complete, clear SError */
3647 if (!sata_scr_read(link, SCR_ERROR, &serror))
3648 sata_scr_write(link, SCR_ERROR, serror);
3650 /* print link status */
3651 sata_print_link_status(link);
3653 EXPORT_SYMBOL_GPL(ata_std_postreset);
3656 * ata_dev_same_device - Determine whether new ID matches configured device
3657 * @dev: device to compare against
3658 * @new_class: class of the new device
3659 * @new_id: IDENTIFY page of the new device
3661 * Compare @new_class and @new_id against @dev and determine
3662 * whether @dev is the device indicated by @new_class and
3669 * 1 if @dev matches @new_class and @new_id, 0 otherwise.
3671 static int ata_dev_same_device(struct ata_device *dev, unsigned int new_class,
3674 const u16 *old_id = dev->id;
3675 unsigned char model[2][ATA_ID_PROD_LEN + 1];
3676 unsigned char serial[2][ATA_ID_SERNO_LEN + 1];
3678 if (dev->class != new_class) {
3679 ata_dev_info(dev, "class mismatch %d != %d\n",
3680 dev->class, new_class);
3684 ata_id_c_string(old_id, model[0], ATA_ID_PROD, sizeof(model[0]));
3685 ata_id_c_string(new_id, model[1], ATA_ID_PROD, sizeof(model[1]));
3686 ata_id_c_string(old_id, serial[0], ATA_ID_SERNO, sizeof(serial[0]));
3687 ata_id_c_string(new_id, serial[1], ATA_ID_SERNO, sizeof(serial[1]));
3689 if (strcmp(model[0], model[1])) {
3690 ata_dev_info(dev, "model number mismatch '%s' != '%s'\n",
3691 model[0], model[1]);
3695 if (strcmp(serial[0], serial[1])) {
3696 ata_dev_info(dev, "serial number mismatch '%s' != '%s'\n",
3697 serial[0], serial[1]);
3705 * ata_dev_reread_id - Re-read IDENTIFY data
3706 * @dev: target ATA device
3707 * @readid_flags: read ID flags
3709 * Re-read IDENTIFY page and make sure @dev is still attached to
3713 * Kernel thread context (may sleep)
3716 * 0 on success, negative errno otherwise
3718 int ata_dev_reread_id(struct ata_device *dev, unsigned int readid_flags)
3720 unsigned int class = dev->class;
3721 u16 *id = (void *)dev->link->ap->sector_buf;
3725 rc = ata_dev_read_id(dev, &class, readid_flags, id);
3729 /* is the device still there? */
3730 if (!ata_dev_same_device(dev, class, id))
3733 memcpy(dev->id, id, sizeof(id[0]) * ATA_ID_WORDS);
3738 * ata_dev_revalidate - Revalidate ATA device
3739 * @dev: device to revalidate
3740 * @new_class: new class code
3741 * @readid_flags: read ID flags
3743 * Re-read IDENTIFY page, make sure @dev is still attached to the
3744 * port and reconfigure it according to the new IDENTIFY page.
3747 * Kernel thread context (may sleep)
3750 * 0 on success, negative errno otherwise
3752 int ata_dev_revalidate(struct ata_device *dev, unsigned int new_class,
3753 unsigned int readid_flags)
3755 u64 n_sectors = dev->n_sectors;
3756 u64 n_native_sectors = dev->n_native_sectors;
3759 if (!ata_dev_enabled(dev))
3762 /* fail early if !ATA && !ATAPI to avoid issuing [P]IDENTIFY to PMP */
3763 if (ata_class_enabled(new_class) &&
3764 new_class != ATA_DEV_ATA &&
3765 new_class != ATA_DEV_ATAPI &&
3766 new_class != ATA_DEV_ZAC &&
3767 new_class != ATA_DEV_SEMB) {
3768 ata_dev_info(dev, "class mismatch %u != %u\n",
3769 dev->class, new_class);
3775 rc = ata_dev_reread_id(dev, readid_flags);
3779 /* configure device according to the new ID */
3780 rc = ata_dev_configure(dev);
3784 /* verify n_sectors hasn't changed */
3785 if (dev->class != ATA_DEV_ATA || !n_sectors ||
3786 dev->n_sectors == n_sectors)
3789 /* n_sectors has changed */
3790 ata_dev_warn(dev, "n_sectors mismatch %llu != %llu\n",
3791 (unsigned long long)n_sectors,
3792 (unsigned long long)dev->n_sectors);
3795 * Something could have caused HPA to be unlocked
3796 * involuntarily. If n_native_sectors hasn't changed and the
3797 * new size matches it, keep the device.
3799 if (dev->n_native_sectors == n_native_sectors &&
3800 dev->n_sectors > n_sectors && dev->n_sectors == n_native_sectors) {
3802 "new n_sectors matches native, probably "
3803 "late HPA unlock, n_sectors updated\n");
3804 /* use the larger n_sectors */
3809 * Some BIOSes boot w/o HPA but resume w/ HPA locked. Try
3810 * unlocking HPA in those cases.
3812 * https://bugzilla.kernel.org/show_bug.cgi?id=15396
3814 if (dev->n_native_sectors == n_native_sectors &&
3815 dev->n_sectors < n_sectors && n_sectors == n_native_sectors &&
3816 !(dev->horkage & ATA_HORKAGE_BROKEN_HPA)) {
3818 "old n_sectors matches native, probably "
3819 "late HPA lock, will try to unlock HPA\n");
3820 /* try unlocking HPA */
3821 dev->flags |= ATA_DFLAG_UNLOCK_HPA;
3826 /* restore original n_[native_]sectors and fail */
3827 dev->n_native_sectors = n_native_sectors;
3828 dev->n_sectors = n_sectors;
3830 ata_dev_err(dev, "revalidation failed (errno=%d)\n", rc);
3834 struct ata_blacklist_entry {
3835 const char *model_num;
3836 const char *model_rev;
3837 unsigned long horkage;
3840 static const struct ata_blacklist_entry ata_device_blacklist [] = {
3841 /* Devices with DMA related problems under Linux */
3842 { "WDC AC11000H", NULL, ATA_HORKAGE_NODMA },
3843 { "WDC AC22100H", NULL, ATA_HORKAGE_NODMA },
3844 { "WDC AC32500H", NULL, ATA_HORKAGE_NODMA },
3845 { "WDC AC33100H", NULL, ATA_HORKAGE_NODMA },
3846 { "WDC AC31600H", NULL, ATA_HORKAGE_NODMA },
3847 { "WDC AC32100H", "24.09P07", ATA_HORKAGE_NODMA },
3848 { "WDC AC23200L", "21.10N21", ATA_HORKAGE_NODMA },
3849 { "Compaq CRD-8241B", NULL, ATA_HORKAGE_NODMA },
3850 { "CRD-8400B", NULL, ATA_HORKAGE_NODMA },
3851 { "CRD-848[02]B", NULL, ATA_HORKAGE_NODMA },
3852 { "CRD-84", NULL, ATA_HORKAGE_NODMA },
3853 { "SanDisk SDP3B", NULL, ATA_HORKAGE_NODMA },
3854 { "SanDisk SDP3B-64", NULL, ATA_HORKAGE_NODMA },
3855 { "SANYO CD-ROM CRD", NULL, ATA_HORKAGE_NODMA },
3856 { "HITACHI CDR-8", NULL, ATA_HORKAGE_NODMA },
3857 { "HITACHI CDR-8[34]35",NULL, ATA_HORKAGE_NODMA },
3858 { "Toshiba CD-ROM XM-6202B", NULL, ATA_HORKAGE_NODMA },
3859 { "TOSHIBA CD-ROM XM-1702BC", NULL, ATA_HORKAGE_NODMA },
3860 { "CD-532E-A", NULL, ATA_HORKAGE_NODMA },
3861 { "E-IDE CD-ROM CR-840",NULL, ATA_HORKAGE_NODMA },
3862 { "CD-ROM Drive/F5A", NULL, ATA_HORKAGE_NODMA },
3863 { "WPI CDD-820", NULL, ATA_HORKAGE_NODMA },
3864 { "SAMSUNG CD-ROM SC-148C", NULL, ATA_HORKAGE_NODMA },
3865 { "SAMSUNG CD-ROM SC", NULL, ATA_HORKAGE_NODMA },
3866 { "ATAPI CD-ROM DRIVE 40X MAXIMUM",NULL,ATA_HORKAGE_NODMA },
3867 { "_NEC DV5800A", NULL, ATA_HORKAGE_NODMA },
3868 { "SAMSUNG CD-ROM SN-124", "N001", ATA_HORKAGE_NODMA },
3869 { "Seagate STT20000A", NULL, ATA_HORKAGE_NODMA },
3870 { " 2GB ATA Flash Disk", "ADMA428M", ATA_HORKAGE_NODMA },
3871 { "VRFDFC22048UCHC-TE*", NULL, ATA_HORKAGE_NODMA },
3872 /* Odd clown on sil3726/4726 PMPs */
3873 { "Config Disk", NULL, ATA_HORKAGE_DISABLE },
3874 /* Similar story with ASMedia 1092 */
3875 { "ASMT109x- Config", NULL, ATA_HORKAGE_DISABLE },
3877 /* Weird ATAPI devices */
3878 { "TORiSAN DVD-ROM DRD-N216", NULL, ATA_HORKAGE_MAX_SEC_128 },
3879 { "QUANTUM DAT DAT72-000", NULL, ATA_HORKAGE_ATAPI_MOD16_DMA },
3880 { "Slimtype DVD A DS8A8SH", NULL, ATA_HORKAGE_MAX_SEC_LBA48 },
3881 { "Slimtype DVD A DS8A9SH", NULL, ATA_HORKAGE_MAX_SEC_LBA48 },
3884 * Causes silent data corruption with higher max sects.
3885 * http://lkml.kernel.org/g/x49wpy40ysk.fsf@segfault.boston.devel.redhat.com
3887 { "ST380013AS", "3.20", ATA_HORKAGE_MAX_SEC_1024 },
3890 * These devices time out with higher max sects.
3891 * https://bugzilla.kernel.org/show_bug.cgi?id=121671
3893 { "LITEON CX1-JB*-HP", NULL, ATA_HORKAGE_MAX_SEC_1024 },
3894 { "LITEON EP1-*", NULL, ATA_HORKAGE_MAX_SEC_1024 },
3896 /* Devices we expect to fail diagnostics */
3898 /* Devices where NCQ should be avoided */
3900 { "WDC WD740ADFD-00", NULL, ATA_HORKAGE_NONCQ },
3901 { "WDC WD740ADFD-00NLR1", NULL, ATA_HORKAGE_NONCQ, },
3902 /* http://thread.gmane.org/gmane.linux.ide/14907 */
3903 { "FUJITSU MHT2060BH", NULL, ATA_HORKAGE_NONCQ },
3905 { "Maxtor *", "BANC*", ATA_HORKAGE_NONCQ },
3906 { "Maxtor 7V300F0", "VA111630", ATA_HORKAGE_NONCQ },
3907 { "ST380817AS", "3.42", ATA_HORKAGE_NONCQ },
3908 { "ST3160023AS", "3.42", ATA_HORKAGE_NONCQ },
3909 { "OCZ CORE_SSD", "02.10104", ATA_HORKAGE_NONCQ },
3911 /* Seagate NCQ + FLUSH CACHE firmware bug */
3912 { "ST31500341AS", "SD1[5-9]", ATA_HORKAGE_NONCQ |
3913 ATA_HORKAGE_FIRMWARE_WARN },
3915 { "ST31000333AS", "SD1[5-9]", ATA_HORKAGE_NONCQ |
3916 ATA_HORKAGE_FIRMWARE_WARN },
3918 { "ST3640[36]23AS", "SD1[5-9]", ATA_HORKAGE_NONCQ |
3919 ATA_HORKAGE_FIRMWARE_WARN },
3921 { "ST3320[68]13AS", "SD1[5-9]", ATA_HORKAGE_NONCQ |
3922 ATA_HORKAGE_FIRMWARE_WARN },
3924 /* drives which fail FPDMA_AA activation (some may freeze afterwards)
3925 the ST disks also have LPM issues */
3926 { "ST1000LM024 HN-M101MBB", NULL, ATA_HORKAGE_BROKEN_FPDMA_AA |
3927 ATA_HORKAGE_NOLPM, },
3928 { "VB0250EAVER", "HPG7", ATA_HORKAGE_BROKEN_FPDMA_AA },
3930 /* Blacklist entries taken from Silicon Image 3124/3132
3931 Windows driver .inf file - also several Linux problem reports */
3932 { "HTS541060G9SA00", "MB3OC60D", ATA_HORKAGE_NONCQ, },
3933 { "HTS541080G9SA00", "MB4OC60D", ATA_HORKAGE_NONCQ, },
3934 { "HTS541010G9SA00", "MBZOC60D", ATA_HORKAGE_NONCQ, },
3936 /* https://bugzilla.kernel.org/show_bug.cgi?id=15573 */
3937 { "C300-CTFDDAC128MAG", "0001", ATA_HORKAGE_NONCQ, },
3939 /* Sandisk SD7/8/9s lock up hard on large trims */
3940 { "SanDisk SD[789]*", NULL, ATA_HORKAGE_MAX_TRIM_128M, },
3942 /* devices which puke on READ_NATIVE_MAX */
3943 { "HDS724040KLSA80", "KFAOA20N", ATA_HORKAGE_BROKEN_HPA, },
3944 { "WDC WD3200JD-00KLB0", "WD-WCAMR1130137", ATA_HORKAGE_BROKEN_HPA },
3945 { "WDC WD2500JD-00HBB0", "WD-WMAL71490727", ATA_HORKAGE_BROKEN_HPA },
3946 { "MAXTOR 6L080L4", "A93.0500", ATA_HORKAGE_BROKEN_HPA },
3948 /* this one allows HPA unlocking but fails IOs on the area */
3949 { "OCZ-VERTEX", "1.30", ATA_HORKAGE_BROKEN_HPA },
3951 /* Devices which report 1 sector over size HPA */
3952 { "ST340823A", NULL, ATA_HORKAGE_HPA_SIZE, },
3953 { "ST320413A", NULL, ATA_HORKAGE_HPA_SIZE, },
3954 { "ST310211A", NULL, ATA_HORKAGE_HPA_SIZE, },
3956 /* Devices which get the IVB wrong */
3957 { "QUANTUM FIREBALLlct10 05", "A03.0900", ATA_HORKAGE_IVB, },
3958 /* Maybe we should just blacklist TSSTcorp... */
3959 { "TSSTcorp CDDVDW SH-S202[HJN]", "SB0[01]", ATA_HORKAGE_IVB, },
3961 /* Devices that do not need bridging limits applied */
3962 { "MTRON MSP-SATA*", NULL, ATA_HORKAGE_BRIDGE_OK, },
3963 { "BUFFALO HD-QSU2/R5", NULL, ATA_HORKAGE_BRIDGE_OK, },
3965 /* Devices which aren't very happy with higher link speeds */
3966 { "WD My Book", NULL, ATA_HORKAGE_1_5_GBPS, },
3967 { "Seagate FreeAgent GoFlex", NULL, ATA_HORKAGE_1_5_GBPS, },
3970 * Devices which choke on SETXFER. Applies only if both the
3971 * device and controller are SATA.
3973 { "PIONEER DVD-RW DVRTD08", NULL, ATA_HORKAGE_NOSETXFER },
3974 { "PIONEER DVD-RW DVRTD08A", NULL, ATA_HORKAGE_NOSETXFER },
3975 { "PIONEER DVD-RW DVR-215", NULL, ATA_HORKAGE_NOSETXFER },
3976 { "PIONEER DVD-RW DVR-212D", NULL, ATA_HORKAGE_NOSETXFER },
3977 { "PIONEER DVD-RW DVR-216D", NULL, ATA_HORKAGE_NOSETXFER },
3979 /* Crucial BX100 SSD 500GB has broken LPM support */
3980 { "CT500BX100SSD1", NULL, ATA_HORKAGE_NOLPM },
3982 /* 512GB MX100 with MU01 firmware has both queued TRIM and LPM issues */
3983 { "Crucial_CT512MX100*", "MU01", ATA_HORKAGE_NO_NCQ_TRIM |
3984 ATA_HORKAGE_ZERO_AFTER_TRIM |
3985 ATA_HORKAGE_NOLPM, },
3986 /* 512GB MX100 with newer firmware has only LPM issues */
3987 { "Crucial_CT512MX100*", NULL, ATA_HORKAGE_ZERO_AFTER_TRIM |
3988 ATA_HORKAGE_NOLPM, },
3990 /* 480GB+ M500 SSDs have both queued TRIM and LPM issues */
3991 { "Crucial_CT480M500*", NULL, ATA_HORKAGE_NO_NCQ_TRIM |
3992 ATA_HORKAGE_ZERO_AFTER_TRIM |
3993 ATA_HORKAGE_NOLPM, },
3994 { "Crucial_CT960M500*", NULL, ATA_HORKAGE_NO_NCQ_TRIM |
3995 ATA_HORKAGE_ZERO_AFTER_TRIM |
3996 ATA_HORKAGE_NOLPM, },
3998 /* These specific Samsung models/firmware-revs do not handle LPM well */
3999 { "SAMSUNG MZMPC128HBFU-000MV", "CXM14M1Q", ATA_HORKAGE_NOLPM, },
4000 { "SAMSUNG SSD PM830 mSATA *", "CXM13D1Q", ATA_HORKAGE_NOLPM, },
4001 { "SAMSUNG MZ7TD256HAFV-000L9", NULL, ATA_HORKAGE_NOLPM, },
4002 { "SAMSUNG MZ7TE512HMHP-000L1", "EXT06L0Q", ATA_HORKAGE_NOLPM, },
4004 /* devices that don't properly handle queued TRIM commands */
4005 { "Micron_M500IT_*", "MU01", ATA_HORKAGE_NO_NCQ_TRIM |
4006 ATA_HORKAGE_ZERO_AFTER_TRIM, },
4007 { "Micron_M500_*", NULL, ATA_HORKAGE_NO_NCQ_TRIM |
4008 ATA_HORKAGE_ZERO_AFTER_TRIM, },
4009 { "Crucial_CT*M500*", NULL, ATA_HORKAGE_NO_NCQ_TRIM |
4010 ATA_HORKAGE_ZERO_AFTER_TRIM, },
4011 { "Micron_M5[15]0_*", "MU01", ATA_HORKAGE_NO_NCQ_TRIM |
4012 ATA_HORKAGE_ZERO_AFTER_TRIM, },
4013 { "Crucial_CT*M550*", "MU01", ATA_HORKAGE_NO_NCQ_TRIM |
4014 ATA_HORKAGE_ZERO_AFTER_TRIM, },
4015 { "Crucial_CT*MX100*", "MU01", ATA_HORKAGE_NO_NCQ_TRIM |
4016 ATA_HORKAGE_ZERO_AFTER_TRIM, },
4017 { "Samsung SSD 840 EVO*", NULL, ATA_HORKAGE_NO_NCQ_TRIM |
4018 ATA_HORKAGE_NO_DMA_LOG |
4019 ATA_HORKAGE_ZERO_AFTER_TRIM, },
4020 { "Samsung SSD 840*", NULL, ATA_HORKAGE_NO_NCQ_TRIM |
4021 ATA_HORKAGE_ZERO_AFTER_TRIM, },
4022 { "Samsung SSD 850*", NULL, ATA_HORKAGE_NO_NCQ_TRIM |
4023 ATA_HORKAGE_ZERO_AFTER_TRIM, },
4024 { "Samsung SSD 860*", NULL, ATA_HORKAGE_NO_NCQ_TRIM |
4025 ATA_HORKAGE_ZERO_AFTER_TRIM |
4026 ATA_HORKAGE_NO_NCQ_ON_ATI, },
4027 { "Samsung SSD 870*", NULL, ATA_HORKAGE_NO_NCQ_TRIM |
4028 ATA_HORKAGE_ZERO_AFTER_TRIM |
4029 ATA_HORKAGE_NO_NCQ_ON_ATI, },
4030 { "FCCT*M500*", NULL, ATA_HORKAGE_NO_NCQ_TRIM |
4031 ATA_HORKAGE_ZERO_AFTER_TRIM, },
4033 /* devices that don't properly handle TRIM commands */
4034 { "SuperSSpeed S238*", NULL, ATA_HORKAGE_NOTRIM, },
4035 { "M88V29*", NULL, ATA_HORKAGE_NOTRIM, },
4038 * As defined, the DRAT (Deterministic Read After Trim) and RZAT
4039 * (Return Zero After Trim) flags in the ATA Command Set are
4040 * unreliable in the sense that they only define what happens if
4041 * the device successfully executed the DSM TRIM command. TRIM
4042 * is only advisory, however, and the device is free to silently
4043 * ignore all or parts of the request.
4045 * Whitelist drives that are known to reliably return zeroes
4050 * The intel 510 drive has buggy DRAT/RZAT. Explicitly exclude
4051 * that model before whitelisting all other intel SSDs.
4053 { "INTEL*SSDSC2MH*", NULL, 0, },
4055 { "Micron*", NULL, ATA_HORKAGE_ZERO_AFTER_TRIM, },
4056 { "Crucial*", NULL, ATA_HORKAGE_ZERO_AFTER_TRIM, },
4057 { "INTEL*SSD*", NULL, ATA_HORKAGE_ZERO_AFTER_TRIM, },
4058 { "SSD*INTEL*", NULL, ATA_HORKAGE_ZERO_AFTER_TRIM, },
4059 { "Samsung*SSD*", NULL, ATA_HORKAGE_ZERO_AFTER_TRIM, },
4060 { "SAMSUNG*SSD*", NULL, ATA_HORKAGE_ZERO_AFTER_TRIM, },
4061 { "SAMSUNG*MZ7KM*", NULL, ATA_HORKAGE_ZERO_AFTER_TRIM, },
4062 { "ST[1248][0248]0[FH]*", NULL, ATA_HORKAGE_ZERO_AFTER_TRIM, },
4065 * Some WD SATA-I drives spin up and down erratically when the link
4066 * is put into the slumber mode. We don't have full list of the
4067 * affected devices. Disable LPM if the device matches one of the
4068 * known prefixes and is SATA-1. As a side effect LPM partial is
4071 * https://bugzilla.kernel.org/show_bug.cgi?id=57211
4073 { "WDC WD800JD-*", NULL, ATA_HORKAGE_WD_BROKEN_LPM },
4074 { "WDC WD1200JD-*", NULL, ATA_HORKAGE_WD_BROKEN_LPM },
4075 { "WDC WD1600JD-*", NULL, ATA_HORKAGE_WD_BROKEN_LPM },
4076 { "WDC WD2000JD-*", NULL, ATA_HORKAGE_WD_BROKEN_LPM },
4077 { "WDC WD2500JD-*", NULL, ATA_HORKAGE_WD_BROKEN_LPM },
4078 { "WDC WD3000JD-*", NULL, ATA_HORKAGE_WD_BROKEN_LPM },
4079 { "WDC WD3200JD-*", NULL, ATA_HORKAGE_WD_BROKEN_LPM },
4082 * This sata dom device goes on a walkabout when the ATA_LOG_DIRECTORY
4083 * log page is accessed. Ensure we never ask for this log page with
4086 { "SATADOM-ML 3ME", NULL, ATA_HORKAGE_NO_LOG_DIR },
4092 static unsigned long ata_dev_blacklisted(const struct ata_device *dev)
4094 unsigned char model_num[ATA_ID_PROD_LEN + 1];
4095 unsigned char model_rev[ATA_ID_FW_REV_LEN + 1];
4096 const struct ata_blacklist_entry *ad = ata_device_blacklist;
4098 ata_id_c_string(dev->id, model_num, ATA_ID_PROD, sizeof(model_num));
4099 ata_id_c_string(dev->id, model_rev, ATA_ID_FW_REV, sizeof(model_rev));
4101 while (ad->model_num) {
4102 if (glob_match(ad->model_num, model_num)) {
4103 if (ad->model_rev == NULL)
4105 if (glob_match(ad->model_rev, model_rev))
4113 static int ata_dma_blacklisted(const struct ata_device *dev)
4115 /* We don't support polling DMA.
4116 * DMA blacklist those ATAPI devices with CDB-intr (and use PIO)
4117 * if the LLDD handles only interrupts in the HSM_ST_LAST state.
4119 if ((dev->link->ap->flags & ATA_FLAG_PIO_POLLING) &&
4120 (dev->flags & ATA_DFLAG_CDB_INTR))
4122 return (dev->horkage & ATA_HORKAGE_NODMA) ? 1 : 0;
4126 * ata_is_40wire - check drive side detection
4129 * Perform drive side detection decoding, allowing for device vendors
4130 * who can't follow the documentation.
4133 static int ata_is_40wire(struct ata_device *dev)
4135 if (dev->horkage & ATA_HORKAGE_IVB)
4136 return ata_drive_40wire_relaxed(dev->id);
4137 return ata_drive_40wire(dev->id);
4141 * cable_is_40wire - 40/80/SATA decider
4142 * @ap: port to consider
4144 * This function encapsulates the policy for speed management
4145 * in one place. At the moment we don't cache the result but
4146 * there is a good case for setting ap->cbl to the result when
4147 * we are called with unknown cables (and figuring out if it
4148 * impacts hotplug at all).
4150 * Return 1 if the cable appears to be 40 wire.
4153 static int cable_is_40wire(struct ata_port *ap)
4155 struct ata_link *link;
4156 struct ata_device *dev;
4158 /* If the controller thinks we are 40 wire, we are. */
4159 if (ap->cbl == ATA_CBL_PATA40)
4162 /* If the controller thinks we are 80 wire, we are. */
4163 if (ap->cbl == ATA_CBL_PATA80 || ap->cbl == ATA_CBL_SATA)
4166 /* If the system is known to be 40 wire short cable (eg
4167 * laptop), then we allow 80 wire modes even if the drive
4170 if (ap->cbl == ATA_CBL_PATA40_SHORT)
4173 /* If the controller doesn't know, we scan.
4175 * Note: We look for all 40 wire detects at this point. Any
4176 * 80 wire detect is taken to be 80 wire cable because
4177 * - in many setups only the one drive (slave if present) will
4178 * give a valid detect
4179 * - if you have a non detect capable drive you don't want it
4180 * to colour the choice
4182 ata_for_each_link(link, ap, EDGE) {
4183 ata_for_each_dev(dev, link, ENABLED) {
4184 if (!ata_is_40wire(dev))
4192 * ata_dev_xfermask - Compute supported xfermask of the given device
4193 * @dev: Device to compute xfermask for
4195 * Compute supported xfermask of @dev and store it in
4196 * dev->*_mask. This function is responsible for applying all
4197 * known limits including host controller limits, device
4203 static void ata_dev_xfermask(struct ata_device *dev)
4205 struct ata_link *link = dev->link;
4206 struct ata_port *ap = link->ap;
4207 struct ata_host *host = ap->host;
4208 unsigned long xfer_mask;
4210 /* controller modes available */
4211 xfer_mask = ata_pack_xfermask(ap->pio_mask,
4212 ap->mwdma_mask, ap->udma_mask);
4214 /* drive modes available */
4215 xfer_mask &= ata_pack_xfermask(dev->pio_mask,
4216 dev->mwdma_mask, dev->udma_mask);
4217 xfer_mask &= ata_id_xfermask(dev->id);
4220 * CFA Advanced TrueIDE timings are not allowed on a shared
4223 if (ata_dev_pair(dev)) {
4224 /* No PIO5 or PIO6 */
4225 xfer_mask &= ~(0x03 << (ATA_SHIFT_PIO + 5));
4226 /* No MWDMA3 or MWDMA 4 */
4227 xfer_mask &= ~(0x03 << (ATA_SHIFT_MWDMA + 3));
4230 if (ata_dma_blacklisted(dev)) {
4231 xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA);
4233 "device is on DMA blacklist, disabling DMA\n");
4236 if ((host->flags & ATA_HOST_SIMPLEX) &&
4237 host->simplex_claimed && host->simplex_claimed != ap) {
4238 xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA);
4240 "simplex DMA is claimed by other device, disabling DMA\n");
4243 if (ap->flags & ATA_FLAG_NO_IORDY)
4244 xfer_mask &= ata_pio_mask_no_iordy(dev);
4246 if (ap->ops->mode_filter)
4247 xfer_mask = ap->ops->mode_filter(dev, xfer_mask);
4249 /* Apply cable rule here. Don't apply it early because when
4250 * we handle hot plug the cable type can itself change.
4251 * Check this last so that we know if the transfer rate was
4252 * solely limited by the cable.
4253 * Unknown or 80 wire cables reported host side are checked
4254 * drive side as well. Cases where we know a 40wire cable
4255 * is used safely for 80 are not checked here.
4257 if (xfer_mask & (0xF8 << ATA_SHIFT_UDMA))
4258 /* UDMA/44 or higher would be available */
4259 if (cable_is_40wire(ap)) {
4261 "limited to UDMA/33 due to 40-wire cable\n");
4262 xfer_mask &= ~(0xF8 << ATA_SHIFT_UDMA);
4265 ata_unpack_xfermask(xfer_mask, &dev->pio_mask,
4266 &dev->mwdma_mask, &dev->udma_mask);
4270 * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command
4271 * @dev: Device to which command will be sent
4273 * Issue SET FEATURES - XFER MODE command to device @dev
4277 * PCI/etc. bus probe sem.
4280 * 0 on success, AC_ERR_* mask otherwise.
4283 static unsigned int ata_dev_set_xfermode(struct ata_device *dev)
4285 struct ata_taskfile tf;
4286 unsigned int err_mask;
4288 /* set up set-features taskfile */
4289 ata_dev_dbg(dev, "set features - xfer mode\n");
4291 /* Some controllers and ATAPI devices show flaky interrupt
4292 * behavior after setting xfer mode. Use polling instead.
4294 ata_tf_init(dev, &tf);
4295 tf.command = ATA_CMD_SET_FEATURES;
4296 tf.feature = SETFEATURES_XFER;
4297 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_POLLING;
4298 tf.protocol = ATA_PROT_NODATA;
4299 /* If we are using IORDY we must send the mode setting command */
4300 if (ata_pio_need_iordy(dev))
4301 tf.nsect = dev->xfer_mode;
4302 /* If the device has IORDY and the controller does not - turn it off */
4303 else if (ata_id_has_iordy(dev->id))
4305 else /* In the ancient relic department - skip all of this */
4308 /* On some disks, this command causes spin-up, so we need longer timeout */
4309 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 15000);
4315 * ata_dev_set_feature - Issue SET FEATURES - SATA FEATURES
4316 * @dev: Device to which command will be sent
4317 * @enable: Whether to enable or disable the feature
4318 * @feature: The sector count represents the feature to set
4320 * Issue SET FEATURES - SATA FEATURES command to device @dev
4321 * on port @ap with sector count
4324 * PCI/etc. bus probe sem.
4327 * 0 on success, AC_ERR_* mask otherwise.
4329 unsigned int ata_dev_set_feature(struct ata_device *dev, u8 enable, u8 feature)
4331 struct ata_taskfile tf;
4332 unsigned int err_mask;
4333 unsigned long timeout = 0;
4335 /* set up set-features taskfile */
4336 ata_dev_dbg(dev, "set features - SATA features\n");
4338 ata_tf_init(dev, &tf);
4339 tf.command = ATA_CMD_SET_FEATURES;
4340 tf.feature = enable;
4341 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
4342 tf.protocol = ATA_PROT_NODATA;
4345 if (enable == SETFEATURES_SPINUP)
4346 timeout = ata_probe_timeout ?
4347 ata_probe_timeout * 1000 : SETFEATURES_SPINUP_TIMEOUT;
4348 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, timeout);
4352 EXPORT_SYMBOL_GPL(ata_dev_set_feature);
4355 * ata_dev_init_params - Issue INIT DEV PARAMS command
4356 * @dev: Device to which command will be sent
4357 * @heads: Number of heads (taskfile parameter)
4358 * @sectors: Number of sectors (taskfile parameter)
4361 * Kernel thread context (may sleep)
4364 * 0 on success, AC_ERR_* mask otherwise.
4366 static unsigned int ata_dev_init_params(struct ata_device *dev,
4367 u16 heads, u16 sectors)
4369 struct ata_taskfile tf;
4370 unsigned int err_mask;
4372 /* Number of sectors per track 1-255. Number of heads 1-16 */
4373 if (sectors < 1 || sectors > 255 || heads < 1 || heads > 16)
4374 return AC_ERR_INVALID;
4376 /* set up init dev params taskfile */
4377 ata_dev_dbg(dev, "init dev params \n");
4379 ata_tf_init(dev, &tf);
4380 tf.command = ATA_CMD_INIT_DEV_PARAMS;
4381 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
4382 tf.protocol = ATA_PROT_NODATA;
4384 tf.device |= (heads - 1) & 0x0f; /* max head = num. of heads - 1 */
4386 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
4387 /* A clean abort indicates an original or just out of spec drive
4388 and we should continue as we issue the setup based on the
4389 drive reported working geometry */
4390 if (err_mask == AC_ERR_DEV && (tf.error & ATA_ABORTED))
4397 * atapi_check_dma - Check whether ATAPI DMA can be supported
4398 * @qc: Metadata associated with taskfile to check
4400 * Allow low-level driver to filter ATA PACKET commands, returning
4401 * a status indicating whether or not it is OK to use DMA for the
4402 * supplied PACKET command.
4405 * spin_lock_irqsave(host lock)
4407 * RETURNS: 0 when ATAPI DMA can be used
4410 int atapi_check_dma(struct ata_queued_cmd *qc)
4412 struct ata_port *ap = qc->ap;
4414 /* Don't allow DMA if it isn't multiple of 16 bytes. Quite a
4415 * few ATAPI devices choke on such DMA requests.
4417 if (!(qc->dev->horkage & ATA_HORKAGE_ATAPI_MOD16_DMA) &&
4418 unlikely(qc->nbytes & 15))
4421 if (ap->ops->check_atapi_dma)
4422 return ap->ops->check_atapi_dma(qc);
4428 * ata_std_qc_defer - Check whether a qc needs to be deferred
4429 * @qc: ATA command in question
4431 * Non-NCQ commands cannot run with any other command, NCQ or
4432 * not. As upper layer only knows the queue depth, we are
4433 * responsible for maintaining exclusion. This function checks
4434 * whether a new command @qc can be issued.
4437 * spin_lock_irqsave(host lock)
4440 * ATA_DEFER_* if deferring is needed, 0 otherwise.
4442 int ata_std_qc_defer(struct ata_queued_cmd *qc)
4444 struct ata_link *link = qc->dev->link;
4446 if (ata_is_ncq(qc->tf.protocol)) {
4447 if (!ata_tag_valid(link->active_tag))
4450 if (!ata_tag_valid(link->active_tag) && !link->sactive)
4454 return ATA_DEFER_LINK;
4456 EXPORT_SYMBOL_GPL(ata_std_qc_defer);
4458 enum ata_completion_errors ata_noop_qc_prep(struct ata_queued_cmd *qc)
4462 EXPORT_SYMBOL_GPL(ata_noop_qc_prep);
4465 * ata_sg_init - Associate command with scatter-gather table.
4466 * @qc: Command to be associated
4467 * @sg: Scatter-gather table.
4468 * @n_elem: Number of elements in s/g table.
4470 * Initialize the data-related elements of queued_cmd @qc
4471 * to point to a scatter-gather table @sg, containing @n_elem
4475 * spin_lock_irqsave(host lock)
4477 void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
4478 unsigned int n_elem)
4481 qc->n_elem = n_elem;
4485 #ifdef CONFIG_HAS_DMA
4488 * ata_sg_clean - Unmap DMA memory associated with command
4489 * @qc: Command containing DMA memory to be released
4491 * Unmap all mapped DMA memory associated with this command.
4494 * spin_lock_irqsave(host lock)
4496 static void ata_sg_clean(struct ata_queued_cmd *qc)
4498 struct ata_port *ap = qc->ap;
4499 struct scatterlist *sg = qc->sg;
4500 int dir = qc->dma_dir;
4502 WARN_ON_ONCE(sg == NULL);
4505 dma_unmap_sg(ap->dev, sg, qc->orig_n_elem, dir);
4507 qc->flags &= ~ATA_QCFLAG_DMAMAP;
4512 * ata_sg_setup - DMA-map the scatter-gather table associated with a command.
4513 * @qc: Command with scatter-gather table to be mapped.
4515 * DMA-map the scatter-gather table associated with queued_cmd @qc.
4518 * spin_lock_irqsave(host lock)
4521 * Zero on success, negative on error.
4524 static int ata_sg_setup(struct ata_queued_cmd *qc)
4526 struct ata_port *ap = qc->ap;
4527 unsigned int n_elem;
4529 n_elem = dma_map_sg(ap->dev, qc->sg, qc->n_elem, qc->dma_dir);
4533 qc->orig_n_elem = qc->n_elem;
4534 qc->n_elem = n_elem;
4535 qc->flags |= ATA_QCFLAG_DMAMAP;
4540 #else /* !CONFIG_HAS_DMA */
4542 static inline void ata_sg_clean(struct ata_queued_cmd *qc) {}
4543 static inline int ata_sg_setup(struct ata_queued_cmd *qc) { return -1; }
4545 #endif /* !CONFIG_HAS_DMA */
4548 * swap_buf_le16 - swap halves of 16-bit words in place
4549 * @buf: Buffer to swap
4550 * @buf_words: Number of 16-bit words in buffer.
4552 * Swap halves of 16-bit words if needed to convert from
4553 * little-endian byte order to native cpu byte order, or
4557 * Inherited from caller.
4559 void swap_buf_le16(u16 *buf, unsigned int buf_words)
4564 for (i = 0; i < buf_words; i++)
4565 buf[i] = le16_to_cpu(buf[i]);
4566 #endif /* __BIG_ENDIAN */
4570 * ata_qc_new_init - Request an available ATA command, and initialize it
4571 * @dev: Device from whom we request an available command structure
4578 struct ata_queued_cmd *ata_qc_new_init(struct ata_device *dev, int tag)
4580 struct ata_port *ap = dev->link->ap;
4581 struct ata_queued_cmd *qc;
4583 /* no command while frozen */
4584 if (unlikely(ap->pflags & ATA_PFLAG_FROZEN))
4588 if (ap->flags & ATA_FLAG_SAS_HOST) {
4589 tag = ata_sas_allocate_tag(ap);
4594 qc = __ata_qc_from_tag(ap, tag);
4595 qc->tag = qc->hw_tag = tag;
4606 * ata_qc_free - free unused ata_queued_cmd
4607 * @qc: Command to complete
4609 * Designed to free unused ata_queued_cmd object
4610 * in case something prevents using it.
4613 * spin_lock_irqsave(host lock)
4615 void ata_qc_free(struct ata_queued_cmd *qc)
4617 struct ata_port *ap;
4620 WARN_ON_ONCE(qc == NULL); /* ata_qc_from_tag _might_ return NULL */
4625 if (ata_tag_valid(tag)) {
4626 qc->tag = ATA_TAG_POISON;
4627 if (ap->flags & ATA_FLAG_SAS_HOST)
4628 ata_sas_free_tag(tag, ap);
4632 void __ata_qc_complete(struct ata_queued_cmd *qc)
4634 struct ata_port *ap;
4635 struct ata_link *link;
4637 WARN_ON_ONCE(qc == NULL); /* ata_qc_from_tag _might_ return NULL */
4638 WARN_ON_ONCE(!(qc->flags & ATA_QCFLAG_ACTIVE));
4640 link = qc->dev->link;
4642 if (likely(qc->flags & ATA_QCFLAG_DMAMAP))
4645 /* command should be marked inactive atomically with qc completion */
4646 if (ata_is_ncq(qc->tf.protocol)) {
4647 link->sactive &= ~(1 << qc->hw_tag);
4649 ap->nr_active_links--;
4651 link->active_tag = ATA_TAG_POISON;
4652 ap->nr_active_links--;
4655 /* clear exclusive status */
4656 if (unlikely(qc->flags & ATA_QCFLAG_CLEAR_EXCL &&
4657 ap->excl_link == link))
4658 ap->excl_link = NULL;
4660 /* atapi: mark qc as inactive to prevent the interrupt handler
4661 * from completing the command twice later, before the error handler
4662 * is called. (when rc != 0 and atapi request sense is needed)
4664 qc->flags &= ~ATA_QCFLAG_ACTIVE;
4665 ap->qc_active &= ~(1ULL << qc->tag);
4667 /* call completion callback */
4668 qc->complete_fn(qc);
4671 static void fill_result_tf(struct ata_queued_cmd *qc)
4673 struct ata_port *ap = qc->ap;
4675 qc->result_tf.flags = qc->tf.flags;
4676 ap->ops->qc_fill_rtf(qc);
4679 static void ata_verify_xfer(struct ata_queued_cmd *qc)
4681 struct ata_device *dev = qc->dev;
4683 if (!ata_is_data(qc->tf.protocol))
4686 if ((dev->mwdma_mask || dev->udma_mask) && ata_is_pio(qc->tf.protocol))
4689 dev->flags &= ~ATA_DFLAG_DUBIOUS_XFER;
4693 * ata_qc_complete - Complete an active ATA command
4694 * @qc: Command to complete
4696 * Indicate to the mid and upper layers that an ATA command has
4697 * completed, with either an ok or not-ok status.
4699 * Refrain from calling this function multiple times when
4700 * successfully completing multiple NCQ commands.
4701 * ata_qc_complete_multiple() should be used instead, which will
4702 * properly update IRQ expect state.
4705 * spin_lock_irqsave(host lock)
4707 void ata_qc_complete(struct ata_queued_cmd *qc)
4709 struct ata_port *ap = qc->ap;
4711 /* Trigger the LED (if available) */
4712 ledtrig_disk_activity(!!(qc->tf.flags & ATA_TFLAG_WRITE));
4714 /* XXX: New EH and old EH use different mechanisms to
4715 * synchronize EH with regular execution path.
4717 * In new EH, a failed qc is marked with ATA_QCFLAG_FAILED.
4718 * Normal execution path is responsible for not accessing a
4719 * failed qc. libata core enforces the rule by returning NULL
4720 * from ata_qc_from_tag() for failed qcs.
4722 * Old EH depends on ata_qc_complete() nullifying completion
4723 * requests if ATA_QCFLAG_EH_SCHEDULED is set. Old EH does
4724 * not synchronize with interrupt handler. Only PIO task is
4727 if (ap->ops->error_handler) {
4728 struct ata_device *dev = qc->dev;
4729 struct ata_eh_info *ehi = &dev->link->eh_info;
4731 if (unlikely(qc->err_mask))
4732 qc->flags |= ATA_QCFLAG_FAILED;
4735 * Finish internal commands without any further processing
4736 * and always with the result TF filled.
4738 if (unlikely(ata_tag_internal(qc->tag))) {
4740 trace_ata_qc_complete_internal(qc);
4741 __ata_qc_complete(qc);
4746 * Non-internal qc has failed. Fill the result TF and
4749 if (unlikely(qc->flags & ATA_QCFLAG_FAILED)) {
4751 trace_ata_qc_complete_failed(qc);
4752 ata_qc_schedule_eh(qc);
4756 WARN_ON_ONCE(ap->pflags & ATA_PFLAG_FROZEN);
4758 /* read result TF if requested */
4759 if (qc->flags & ATA_QCFLAG_RESULT_TF)
4762 trace_ata_qc_complete_done(qc);
4763 /* Some commands need post-processing after successful
4766 switch (qc->tf.command) {
4767 case ATA_CMD_SET_FEATURES:
4768 if (qc->tf.feature != SETFEATURES_WC_ON &&
4769 qc->tf.feature != SETFEATURES_WC_OFF &&
4770 qc->tf.feature != SETFEATURES_RA_ON &&
4771 qc->tf.feature != SETFEATURES_RA_OFF)
4774 case ATA_CMD_INIT_DEV_PARAMS: /* CHS translation changed */
4775 case ATA_CMD_SET_MULTI: /* multi_count changed */
4776 /* revalidate device */
4777 ehi->dev_action[dev->devno] |= ATA_EH_REVALIDATE;
4778 ata_port_schedule_eh(ap);
4782 dev->flags |= ATA_DFLAG_SLEEPING;
4786 if (unlikely(dev->flags & ATA_DFLAG_DUBIOUS_XFER))
4787 ata_verify_xfer(qc);
4789 __ata_qc_complete(qc);
4791 if (qc->flags & ATA_QCFLAG_EH_SCHEDULED)
4794 /* read result TF if failed or requested */
4795 if (qc->err_mask || qc->flags & ATA_QCFLAG_RESULT_TF)
4798 __ata_qc_complete(qc);
4801 EXPORT_SYMBOL_GPL(ata_qc_complete);
4804 * ata_qc_get_active - get bitmask of active qcs
4805 * @ap: port in question
4808 * spin_lock_irqsave(host lock)
4811 * Bitmask of active qcs
4813 u64 ata_qc_get_active(struct ata_port *ap)
4815 u64 qc_active = ap->qc_active;
4817 /* ATA_TAG_INTERNAL is sent to hw as tag 0 */
4818 if (qc_active & (1ULL << ATA_TAG_INTERNAL)) {
4819 qc_active |= (1 << 0);
4820 qc_active &= ~(1ULL << ATA_TAG_INTERNAL);
4825 EXPORT_SYMBOL_GPL(ata_qc_get_active);
4828 * ata_qc_issue - issue taskfile to device
4829 * @qc: command to issue to device
4831 * Prepare an ATA command to submission to device.
4832 * This includes mapping the data into a DMA-able
4833 * area, filling in the S/G table, and finally
4834 * writing the taskfile to hardware, starting the command.
4837 * spin_lock_irqsave(host lock)
4839 void ata_qc_issue(struct ata_queued_cmd *qc)
4841 struct ata_port *ap = qc->ap;
4842 struct ata_link *link = qc->dev->link;
4843 u8 prot = qc->tf.protocol;
4845 /* Make sure only one non-NCQ command is outstanding. The
4846 * check is skipped for old EH because it reuses active qc to
4847 * request ATAPI sense.
4849 WARN_ON_ONCE(ap->ops->error_handler && ata_tag_valid(link->active_tag));
4851 if (ata_is_ncq(prot)) {
4852 WARN_ON_ONCE(link->sactive & (1 << qc->hw_tag));
4855 ap->nr_active_links++;
4856 link->sactive |= 1 << qc->hw_tag;
4858 WARN_ON_ONCE(link->sactive);
4860 ap->nr_active_links++;
4861 link->active_tag = qc->tag;
4864 qc->flags |= ATA_QCFLAG_ACTIVE;
4865 ap->qc_active |= 1ULL << qc->tag;
4868 * We guarantee to LLDs that they will have at least one
4869 * non-zero sg if the command is a data command.
4871 if (ata_is_data(prot) && (!qc->sg || !qc->n_elem || !qc->nbytes))
4874 if (ata_is_dma(prot) || (ata_is_pio(prot) &&
4875 (ap->flags & ATA_FLAG_PIO_DMA)))
4876 if (ata_sg_setup(qc))
4879 /* if device is sleeping, schedule reset and abort the link */
4880 if (unlikely(qc->dev->flags & ATA_DFLAG_SLEEPING)) {
4881 link->eh_info.action |= ATA_EH_RESET;
4882 ata_ehi_push_desc(&link->eh_info, "waking up from sleep");
4883 ata_link_abort(link);
4887 trace_ata_qc_prep(qc);
4888 qc->err_mask |= ap->ops->qc_prep(qc);
4889 if (unlikely(qc->err_mask))
4891 trace_ata_qc_issue(qc);
4892 qc->err_mask |= ap->ops->qc_issue(qc);
4893 if (unlikely(qc->err_mask))
4898 qc->err_mask |= AC_ERR_SYSTEM;
4900 ata_qc_complete(qc);
4904 * ata_phys_link_online - test whether the given link is online
4905 * @link: ATA link to test
4907 * Test whether @link is online. Note that this function returns
4908 * 0 if online status of @link cannot be obtained, so
4909 * ata_link_online(link) != !ata_link_offline(link).
4915 * True if the port online status is available and online.
4917 bool ata_phys_link_online(struct ata_link *link)
4921 if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0 &&
4922 ata_sstatus_online(sstatus))
4928 * ata_phys_link_offline - test whether the given link is offline
4929 * @link: ATA link to test
4931 * Test whether @link is offline. Note that this function
4932 * returns 0 if offline status of @link cannot be obtained, so
4933 * ata_link_online(link) != !ata_link_offline(link).
4939 * True if the port offline status is available and offline.
4941 bool ata_phys_link_offline(struct ata_link *link)
4945 if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0 &&
4946 !ata_sstatus_online(sstatus))
4952 * ata_link_online - test whether the given link is online
4953 * @link: ATA link to test
4955 * Test whether @link is online. This is identical to
4956 * ata_phys_link_online() when there's no slave link. When
4957 * there's a slave link, this function should only be called on
4958 * the master link and will return true if any of M/S links is
4965 * True if the port online status is available and online.
4967 bool ata_link_online(struct ata_link *link)
4969 struct ata_link *slave = link->ap->slave_link;
4971 WARN_ON(link == slave); /* shouldn't be called on slave link */
4973 return ata_phys_link_online(link) ||
4974 (slave && ata_phys_link_online(slave));
4976 EXPORT_SYMBOL_GPL(ata_link_online);
4979 * ata_link_offline - test whether the given link is offline
4980 * @link: ATA link to test
4982 * Test whether @link is offline. This is identical to
4983 * ata_phys_link_offline() when there's no slave link. When
4984 * there's a slave link, this function should only be called on
4985 * the master link and will return true if both M/S links are
4992 * True if the port offline status is available and offline.
4994 bool ata_link_offline(struct ata_link *link)
4996 struct ata_link *slave = link->ap->slave_link;
4998 WARN_ON(link == slave); /* shouldn't be called on slave link */
5000 return ata_phys_link_offline(link) &&
5001 (!slave || ata_phys_link_offline(slave));
5003 EXPORT_SYMBOL_GPL(ata_link_offline);
5006 static void ata_port_request_pm(struct ata_port *ap, pm_message_t mesg,
5007 unsigned int action, unsigned int ehi_flags,
5010 struct ata_link *link;
5011 unsigned long flags;
5013 /* Previous resume operation might still be in
5014 * progress. Wait for PM_PENDING to clear.
5016 if (ap->pflags & ATA_PFLAG_PM_PENDING) {
5017 ata_port_wait_eh(ap);
5018 WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING);
5021 /* request PM ops to EH */
5022 spin_lock_irqsave(ap->lock, flags);
5025 ap->pflags |= ATA_PFLAG_PM_PENDING;
5026 ata_for_each_link(link, ap, HOST_FIRST) {
5027 link->eh_info.action |= action;
5028 link->eh_info.flags |= ehi_flags;
5031 ata_port_schedule_eh(ap);
5033 spin_unlock_irqrestore(ap->lock, flags);
5036 ata_port_wait_eh(ap);
5037 WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING);
5042 * On some hardware, device fails to respond after spun down for suspend. As
5043 * the device won't be used before being resumed, we don't need to touch the
5044 * device. Ask EH to skip the usual stuff and proceed directly to suspend.
5046 * http://thread.gmane.org/gmane.linux.ide/46764
5048 static const unsigned int ata_port_suspend_ehi = ATA_EHI_QUIET
5049 | ATA_EHI_NO_AUTOPSY
5050 | ATA_EHI_NO_RECOVERY;
5052 static void ata_port_suspend(struct ata_port *ap, pm_message_t mesg)
5054 ata_port_request_pm(ap, mesg, 0, ata_port_suspend_ehi, false);
5057 static void ata_port_suspend_async(struct ata_port *ap, pm_message_t mesg)
5059 ata_port_request_pm(ap, mesg, 0, ata_port_suspend_ehi, true);
5062 static int ata_port_pm_suspend(struct device *dev)
5064 struct ata_port *ap = to_ata_port(dev);
5066 if (pm_runtime_suspended(dev))
5069 ata_port_suspend(ap, PMSG_SUSPEND);
5073 static int ata_port_pm_freeze(struct device *dev)
5075 struct ata_port *ap = to_ata_port(dev);
5077 if (pm_runtime_suspended(dev))
5080 ata_port_suspend(ap, PMSG_FREEZE);
5084 static int ata_port_pm_poweroff(struct device *dev)
5086 ata_port_suspend(to_ata_port(dev), PMSG_HIBERNATE);
5090 static const unsigned int ata_port_resume_ehi = ATA_EHI_NO_AUTOPSY
5093 static void ata_port_resume(struct ata_port *ap, pm_message_t mesg)
5095 ata_port_request_pm(ap, mesg, ATA_EH_RESET, ata_port_resume_ehi, false);
5098 static void ata_port_resume_async(struct ata_port *ap, pm_message_t mesg)
5100 ata_port_request_pm(ap, mesg, ATA_EH_RESET, ata_port_resume_ehi, true);
5103 static int ata_port_pm_resume(struct device *dev)
5105 ata_port_resume_async(to_ata_port(dev), PMSG_RESUME);
5106 pm_runtime_disable(dev);
5107 pm_runtime_set_active(dev);
5108 pm_runtime_enable(dev);
5113 * For ODDs, the upper layer will poll for media change every few seconds,
5114 * which will make it enter and leave suspend state every few seconds. And
5115 * as each suspend will cause a hard/soft reset, the gain of runtime suspend
5116 * is very little and the ODD may malfunction after constantly being reset.
5117 * So the idle callback here will not proceed to suspend if a non-ZPODD capable
5118 * ODD is attached to the port.
5120 static int ata_port_runtime_idle(struct device *dev)
5122 struct ata_port *ap = to_ata_port(dev);
5123 struct ata_link *link;
5124 struct ata_device *adev;
5126 ata_for_each_link(link, ap, HOST_FIRST) {
5127 ata_for_each_dev(adev, link, ENABLED)
5128 if (adev->class == ATA_DEV_ATAPI &&
5129 !zpodd_dev_enabled(adev))
5136 static int ata_port_runtime_suspend(struct device *dev)
5138 ata_port_suspend(to_ata_port(dev), PMSG_AUTO_SUSPEND);
5142 static int ata_port_runtime_resume(struct device *dev)
5144 ata_port_resume(to_ata_port(dev), PMSG_AUTO_RESUME);
5148 static const struct dev_pm_ops ata_port_pm_ops = {
5149 .suspend = ata_port_pm_suspend,
5150 .resume = ata_port_pm_resume,
5151 .freeze = ata_port_pm_freeze,
5152 .thaw = ata_port_pm_resume,
5153 .poweroff = ata_port_pm_poweroff,
5154 .restore = ata_port_pm_resume,
5156 .runtime_suspend = ata_port_runtime_suspend,
5157 .runtime_resume = ata_port_runtime_resume,
5158 .runtime_idle = ata_port_runtime_idle,
5161 /* sas ports don't participate in pm runtime management of ata_ports,
5162 * and need to resume ata devices at the domain level, not the per-port
5163 * level. sas suspend/resume is async to allow parallel port recovery
5164 * since sas has multiple ata_port instances per Scsi_Host.
5166 void ata_sas_port_suspend(struct ata_port *ap)
5168 ata_port_suspend_async(ap, PMSG_SUSPEND);
5170 EXPORT_SYMBOL_GPL(ata_sas_port_suspend);
5172 void ata_sas_port_resume(struct ata_port *ap)
5174 ata_port_resume_async(ap, PMSG_RESUME);
5176 EXPORT_SYMBOL_GPL(ata_sas_port_resume);
5179 * ata_host_suspend - suspend host
5180 * @host: host to suspend
5183 * Suspend @host. Actual operation is performed by port suspend.
5185 void ata_host_suspend(struct ata_host *host, pm_message_t mesg)
5187 host->dev->power.power_state = mesg;
5189 EXPORT_SYMBOL_GPL(ata_host_suspend);
5192 * ata_host_resume - resume host
5193 * @host: host to resume
5195 * Resume @host. Actual operation is performed by port resume.
5197 void ata_host_resume(struct ata_host *host)
5199 host->dev->power.power_state = PMSG_ON;
5201 EXPORT_SYMBOL_GPL(ata_host_resume);
5204 const struct device_type ata_port_type = {
5207 .pm = &ata_port_pm_ops,
5212 * ata_dev_init - Initialize an ata_device structure
5213 * @dev: Device structure to initialize
5215 * Initialize @dev in preparation for probing.
5218 * Inherited from caller.
5220 void ata_dev_init(struct ata_device *dev)
5222 struct ata_link *link = ata_dev_phys_link(dev);
5223 struct ata_port *ap = link->ap;
5224 unsigned long flags;
5226 /* SATA spd limit is bound to the attached device, reset together */
5227 link->sata_spd_limit = link->hw_sata_spd_limit;
5230 /* High bits of dev->flags are used to record warm plug
5231 * requests which occur asynchronously. Synchronize using
5234 spin_lock_irqsave(ap->lock, flags);
5235 dev->flags &= ~ATA_DFLAG_INIT_MASK;
5237 spin_unlock_irqrestore(ap->lock, flags);
5239 memset((void *)dev + ATA_DEVICE_CLEAR_BEGIN, 0,
5240 ATA_DEVICE_CLEAR_END - ATA_DEVICE_CLEAR_BEGIN);
5241 dev->pio_mask = UINT_MAX;
5242 dev->mwdma_mask = UINT_MAX;
5243 dev->udma_mask = UINT_MAX;
5247 * ata_link_init - Initialize an ata_link structure
5248 * @ap: ATA port link is attached to
5249 * @link: Link structure to initialize
5250 * @pmp: Port multiplier port number
5255 * Kernel thread context (may sleep)
5257 void ata_link_init(struct ata_port *ap, struct ata_link *link, int pmp)
5261 /* clear everything except for devices */
5262 memset((void *)link + ATA_LINK_CLEAR_BEGIN, 0,
5263 ATA_LINK_CLEAR_END - ATA_LINK_CLEAR_BEGIN);
5267 link->active_tag = ATA_TAG_POISON;
5268 link->hw_sata_spd_limit = UINT_MAX;
5270 /* can't use iterator, ap isn't initialized yet */
5271 for (i = 0; i < ATA_MAX_DEVICES; i++) {
5272 struct ata_device *dev = &link->device[i];
5275 dev->devno = dev - link->device;
5276 #ifdef CONFIG_ATA_ACPI
5277 dev->gtf_filter = ata_acpi_gtf_filter;
5284 * sata_link_init_spd - Initialize link->sata_spd_limit
5285 * @link: Link to configure sata_spd_limit for
5287 * Initialize ``link->[hw_]sata_spd_limit`` to the currently
5291 * Kernel thread context (may sleep).
5294 * 0 on success, -errno on failure.
5296 int sata_link_init_spd(struct ata_link *link)
5301 rc = sata_scr_read(link, SCR_CONTROL, &link->saved_scontrol);
5305 spd = (link->saved_scontrol >> 4) & 0xf;
5307 link->hw_sata_spd_limit &= (1 << spd) - 1;
5309 ata_force_link_limits(link);
5311 link->sata_spd_limit = link->hw_sata_spd_limit;
5317 * ata_port_alloc - allocate and initialize basic ATA port resources
5318 * @host: ATA host this allocated port belongs to
5320 * Allocate and initialize basic ATA port resources.
5323 * Allocate ATA port on success, NULL on failure.
5326 * Inherited from calling layer (may sleep).
5328 struct ata_port *ata_port_alloc(struct ata_host *host)
5330 struct ata_port *ap;
5332 ap = kzalloc(sizeof(*ap), GFP_KERNEL);
5336 ap->pflags |= ATA_PFLAG_INITIALIZING | ATA_PFLAG_FROZEN;
5337 ap->lock = &host->lock;
5339 ap->local_port_no = -1;
5341 ap->dev = host->dev;
5343 mutex_init(&ap->scsi_scan_mutex);
5344 INIT_DELAYED_WORK(&ap->hotplug_task, ata_scsi_hotplug);
5345 INIT_WORK(&ap->scsi_rescan_task, ata_scsi_dev_rescan);
5346 INIT_LIST_HEAD(&ap->eh_done_q);
5347 init_waitqueue_head(&ap->eh_wait_q);
5348 init_completion(&ap->park_req_pending);
5349 timer_setup(&ap->fastdrain_timer, ata_eh_fastdrain_timerfn,
5352 ap->cbl = ATA_CBL_NONE;
5354 ata_link_init(ap, &ap->link, 0);
5357 ap->stats.unhandled_irq = 1;
5358 ap->stats.idle_irq = 1;
5360 ata_sff_port_init(ap);
5365 static void ata_devres_release(struct device *gendev, void *res)
5367 struct ata_host *host = dev_get_drvdata(gendev);
5370 for (i = 0; i < host->n_ports; i++) {
5371 struct ata_port *ap = host->ports[i];
5377 scsi_host_put(ap->scsi_host);
5381 dev_set_drvdata(gendev, NULL);
5385 static void ata_host_release(struct kref *kref)
5387 struct ata_host *host = container_of(kref, struct ata_host, kref);
5390 for (i = 0; i < host->n_ports; i++) {
5391 struct ata_port *ap = host->ports[i];
5393 kfree(ap->pmp_link);
5394 kfree(ap->slave_link);
5396 host->ports[i] = NULL;
5401 void ata_host_get(struct ata_host *host)
5403 kref_get(&host->kref);
5406 void ata_host_put(struct ata_host *host)
5408 kref_put(&host->kref, ata_host_release);
5410 EXPORT_SYMBOL_GPL(ata_host_put);
5413 * ata_host_alloc - allocate and init basic ATA host resources
5414 * @dev: generic device this host is associated with
5415 * @max_ports: maximum number of ATA ports associated with this host
5417 * Allocate and initialize basic ATA host resources. LLD calls
5418 * this function to allocate a host, initializes it fully and
5419 * attaches it using ata_host_register().
5421 * @max_ports ports are allocated and host->n_ports is
5422 * initialized to @max_ports. The caller is allowed to decrease
5423 * host->n_ports before calling ata_host_register(). The unused
5424 * ports will be automatically freed on registration.
5427 * Allocate ATA host on success, NULL on failure.
5430 * Inherited from calling layer (may sleep).
5432 struct ata_host *ata_host_alloc(struct device *dev, int max_ports)
5434 struct ata_host *host;
5439 /* alloc a container for our list of ATA ports (buses) */
5440 sz = sizeof(struct ata_host) + (max_ports + 1) * sizeof(void *);
5441 host = kzalloc(sz, GFP_KERNEL);
5445 if (!devres_open_group(dev, NULL, GFP_KERNEL))
5448 dr = devres_alloc(ata_devres_release, 0, GFP_KERNEL);
5452 devres_add(dev, dr);
5453 dev_set_drvdata(dev, host);
5455 spin_lock_init(&host->lock);
5456 mutex_init(&host->eh_mutex);
5458 host->n_ports = max_ports;
5459 kref_init(&host->kref);
5461 /* allocate ports bound to this host */
5462 for (i = 0; i < max_ports; i++) {
5463 struct ata_port *ap;
5465 ap = ata_port_alloc(host);
5470 host->ports[i] = ap;
5473 devres_remove_group(dev, NULL);
5477 devres_release_group(dev, NULL);
5482 EXPORT_SYMBOL_GPL(ata_host_alloc);
5485 * ata_host_alloc_pinfo - alloc host and init with port_info array
5486 * @dev: generic device this host is associated with
5487 * @ppi: array of ATA port_info to initialize host with
5488 * @n_ports: number of ATA ports attached to this host
5490 * Allocate ATA host and initialize with info from @ppi. If NULL
5491 * terminated, @ppi may contain fewer entries than @n_ports. The
5492 * last entry will be used for the remaining ports.
5495 * Allocate ATA host on success, NULL on failure.
5498 * Inherited from calling layer (may sleep).
5500 struct ata_host *ata_host_alloc_pinfo(struct device *dev,
5501 const struct ata_port_info * const * ppi,
5504 const struct ata_port_info *pi;
5505 struct ata_host *host;
5508 host = ata_host_alloc(dev, n_ports);
5512 for (i = 0, j = 0, pi = NULL; i < host->n_ports; i++) {
5513 struct ata_port *ap = host->ports[i];
5518 ap->pio_mask = pi->pio_mask;
5519 ap->mwdma_mask = pi->mwdma_mask;
5520 ap->udma_mask = pi->udma_mask;
5521 ap->flags |= pi->flags;
5522 ap->link.flags |= pi->link_flags;
5523 ap->ops = pi->port_ops;
5525 if (!host->ops && (pi->port_ops != &ata_dummy_port_ops))
5526 host->ops = pi->port_ops;
5531 EXPORT_SYMBOL_GPL(ata_host_alloc_pinfo);
5533 static void ata_host_stop(struct device *gendev, void *res)
5535 struct ata_host *host = dev_get_drvdata(gendev);
5538 WARN_ON(!(host->flags & ATA_HOST_STARTED));
5540 for (i = 0; i < host->n_ports; i++) {
5541 struct ata_port *ap = host->ports[i];
5543 if (ap->ops->port_stop)
5544 ap->ops->port_stop(ap);
5547 if (host->ops->host_stop)
5548 host->ops->host_stop(host);
5552 * ata_finalize_port_ops - finalize ata_port_operations
5553 * @ops: ata_port_operations to finalize
5555 * An ata_port_operations can inherit from another ops and that
5556 * ops can again inherit from another. This can go on as many
5557 * times as necessary as long as there is no loop in the
5558 * inheritance chain.
5560 * Ops tables are finalized when the host is started. NULL or
5561 * unspecified entries are inherited from the closet ancestor
5562 * which has the method and the entry is populated with it.
5563 * After finalization, the ops table directly points to all the
5564 * methods and ->inherits is no longer necessary and cleared.
5566 * Using ATA_OP_NULL, inheriting ops can force a method to NULL.
5571 static void ata_finalize_port_ops(struct ata_port_operations *ops)
5573 static DEFINE_SPINLOCK(lock);
5574 const struct ata_port_operations *cur;
5575 void **begin = (void **)ops;
5576 void **end = (void **)&ops->inherits;
5579 if (!ops || !ops->inherits)
5584 for (cur = ops->inherits; cur; cur = cur->inherits) {
5585 void **inherit = (void **)cur;
5587 for (pp = begin; pp < end; pp++, inherit++)
5592 for (pp = begin; pp < end; pp++)
5596 ops->inherits = NULL;
5602 * ata_host_start - start and freeze ports of an ATA host
5603 * @host: ATA host to start ports for
5605 * Start and then freeze ports of @host. Started status is
5606 * recorded in host->flags, so this function can be called
5607 * multiple times. Ports are guaranteed to get started only
5608 * once. If host->ops isn't initialized yet, its set to the
5609 * first non-dummy port ops.
5612 * Inherited from calling layer (may sleep).
5615 * 0 if all ports are started successfully, -errno otherwise.
5617 int ata_host_start(struct ata_host *host)
5620 void *start_dr = NULL;
5623 if (host->flags & ATA_HOST_STARTED)
5626 ata_finalize_port_ops(host->ops);
5628 for (i = 0; i < host->n_ports; i++) {
5629 struct ata_port *ap = host->ports[i];
5631 ata_finalize_port_ops(ap->ops);
5633 if (!host->ops && !ata_port_is_dummy(ap))
5634 host->ops = ap->ops;
5636 if (ap->ops->port_stop)
5640 if (host->ops && host->ops->host_stop)
5644 start_dr = devres_alloc(ata_host_stop, 0, GFP_KERNEL);
5649 for (i = 0; i < host->n_ports; i++) {
5650 struct ata_port *ap = host->ports[i];
5652 if (ap->ops->port_start) {
5653 rc = ap->ops->port_start(ap);
5657 "failed to start port %d (errno=%d)\n",
5662 ata_eh_freeze_port(ap);
5666 devres_add(host->dev, start_dr);
5667 host->flags |= ATA_HOST_STARTED;
5672 struct ata_port *ap = host->ports[i];
5674 if (ap->ops->port_stop)
5675 ap->ops->port_stop(ap);
5677 devres_free(start_dr);
5680 EXPORT_SYMBOL_GPL(ata_host_start);
5683 * ata_host_init - Initialize a host struct for sas (ipr, libsas)
5684 * @host: host to initialize
5685 * @dev: device host is attached to
5689 void ata_host_init(struct ata_host *host, struct device *dev,
5690 struct ata_port_operations *ops)
5692 spin_lock_init(&host->lock);
5693 mutex_init(&host->eh_mutex);
5694 host->n_tags = ATA_MAX_QUEUE;
5697 kref_init(&host->kref);
5699 EXPORT_SYMBOL_GPL(ata_host_init);
5701 void __ata_port_probe(struct ata_port *ap)
5703 struct ata_eh_info *ehi = &ap->link.eh_info;
5704 unsigned long flags;
5706 /* kick EH for boot probing */
5707 spin_lock_irqsave(ap->lock, flags);
5709 ehi->probe_mask |= ATA_ALL_DEVICES;
5710 ehi->action |= ATA_EH_RESET;
5711 ehi->flags |= ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET;
5713 ap->pflags &= ~ATA_PFLAG_INITIALIZING;
5714 ap->pflags |= ATA_PFLAG_LOADING;
5715 ata_port_schedule_eh(ap);
5717 spin_unlock_irqrestore(ap->lock, flags);
5720 int ata_port_probe(struct ata_port *ap)
5724 if (ap->ops->error_handler) {
5725 __ata_port_probe(ap);
5726 ata_port_wait_eh(ap);
5728 rc = ata_bus_probe(ap);
5734 static void async_port_probe(void *data, async_cookie_t cookie)
5736 struct ata_port *ap = data;
5739 * If we're not allowed to scan this host in parallel,
5740 * we need to wait until all previous scans have completed
5741 * before going further.
5742 * Jeff Garzik says this is only within a controller, so we
5743 * don't need to wait for port 0, only for later ports.
5745 if (!(ap->host->flags & ATA_HOST_PARALLEL_SCAN) && ap->port_no != 0)
5746 async_synchronize_cookie(cookie);
5748 (void)ata_port_probe(ap);
5750 /* in order to keep device order, we need to synchronize at this point */
5751 async_synchronize_cookie(cookie);
5753 ata_scsi_scan_host(ap, 1);
5757 * ata_host_register - register initialized ATA host
5758 * @host: ATA host to register
5759 * @sht: template for SCSI host
5761 * Register initialized ATA host. @host is allocated using
5762 * ata_host_alloc() and fully initialized by LLD. This function
5763 * starts ports, registers @host with ATA and SCSI layers and
5764 * probe registered devices.
5767 * Inherited from calling layer (may sleep).
5770 * 0 on success, -errno otherwise.
5772 int ata_host_register(struct ata_host *host, struct scsi_host_template *sht)
5776 host->n_tags = clamp(sht->can_queue, 1, ATA_MAX_QUEUE);
5778 /* host must have been started */
5779 if (!(host->flags & ATA_HOST_STARTED)) {
5780 dev_err(host->dev, "BUG: trying to register unstarted host\n");
5785 /* Blow away unused ports. This happens when LLD can't
5786 * determine the exact number of ports to allocate at
5789 for (i = host->n_ports; host->ports[i]; i++)
5790 kfree(host->ports[i]);
5792 /* give ports names and add SCSI hosts */
5793 for (i = 0; i < host->n_ports; i++) {
5794 host->ports[i]->print_id = atomic_inc_return(&ata_print_id);
5795 host->ports[i]->local_port_no = i + 1;
5798 /* Create associated sysfs transport objects */
5799 for (i = 0; i < host->n_ports; i++) {
5800 rc = ata_tport_add(host->dev,host->ports[i]);
5806 rc = ata_scsi_add_hosts(host, sht);
5810 /* set cable, sata_spd_limit and report */
5811 for (i = 0; i < host->n_ports; i++) {
5812 struct ata_port *ap = host->ports[i];
5813 unsigned long xfer_mask;
5815 /* set SATA cable type if still unset */
5816 if (ap->cbl == ATA_CBL_NONE && (ap->flags & ATA_FLAG_SATA))
5817 ap->cbl = ATA_CBL_SATA;
5819 /* init sata_spd_limit to the current value */
5820 sata_link_init_spd(&ap->link);
5822 sata_link_init_spd(ap->slave_link);
5824 /* print per-port info to dmesg */
5825 xfer_mask = ata_pack_xfermask(ap->pio_mask, ap->mwdma_mask,
5828 if (!ata_port_is_dummy(ap)) {
5829 ata_port_info(ap, "%cATA max %s %s\n",
5830 (ap->flags & ATA_FLAG_SATA) ? 'S' : 'P',
5831 ata_mode_string(xfer_mask),
5832 ap->link.eh_info.desc);
5833 ata_ehi_clear_desc(&ap->link.eh_info);
5835 ata_port_info(ap, "DUMMY\n");
5838 /* perform each probe asynchronously */
5839 for (i = 0; i < host->n_ports; i++) {
5840 struct ata_port *ap = host->ports[i];
5841 ap->cookie = async_schedule(async_port_probe, ap);
5848 ata_tport_delete(host->ports[i]);
5853 EXPORT_SYMBOL_GPL(ata_host_register);
5856 * ata_host_activate - start host, request IRQ and register it
5857 * @host: target ATA host
5858 * @irq: IRQ to request
5859 * @irq_handler: irq_handler used when requesting IRQ
5860 * @irq_flags: irq_flags used when requesting IRQ
5861 * @sht: scsi_host_template to use when registering the host
5863 * After allocating an ATA host and initializing it, most libata
5864 * LLDs perform three steps to activate the host - start host,
5865 * request IRQ and register it. This helper takes necessary
5866 * arguments and performs the three steps in one go.
5868 * An invalid IRQ skips the IRQ registration and expects the host to
5869 * have set polling mode on the port. In this case, @irq_handler
5873 * Inherited from calling layer (may sleep).
5876 * 0 on success, -errno otherwise.
5878 int ata_host_activate(struct ata_host *host, int irq,
5879 irq_handler_t irq_handler, unsigned long irq_flags,
5880 struct scsi_host_template *sht)
5885 rc = ata_host_start(host);
5889 /* Special case for polling mode */
5891 WARN_ON(irq_handler);
5892 return ata_host_register(host, sht);
5895 irq_desc = devm_kasprintf(host->dev, GFP_KERNEL, "%s[%s]",
5896 dev_driver_string(host->dev),
5897 dev_name(host->dev));
5901 rc = devm_request_irq(host->dev, irq, irq_handler, irq_flags,
5906 for (i = 0; i < host->n_ports; i++)
5907 ata_port_desc(host->ports[i], "irq %d", irq);
5909 rc = ata_host_register(host, sht);
5910 /* if failed, just free the IRQ and leave ports alone */
5912 devm_free_irq(host->dev, irq, host);
5916 EXPORT_SYMBOL_GPL(ata_host_activate);
5919 * ata_port_detach - Detach ATA port in preparation of device removal
5920 * @ap: ATA port to be detached
5922 * Detach all ATA devices and the associated SCSI devices of @ap;
5923 * then, remove the associated SCSI host. @ap is guaranteed to
5924 * be quiescent on return from this function.
5927 * Kernel thread context (may sleep).
5929 static void ata_port_detach(struct ata_port *ap)
5931 unsigned long flags;
5932 struct ata_link *link;
5933 struct ata_device *dev;
5935 if (!ap->ops->error_handler)
5938 /* tell EH we're leaving & flush EH */
5939 spin_lock_irqsave(ap->lock, flags);
5940 ap->pflags |= ATA_PFLAG_UNLOADING;
5941 ata_port_schedule_eh(ap);
5942 spin_unlock_irqrestore(ap->lock, flags);
5944 /* wait till EH commits suicide */
5945 ata_port_wait_eh(ap);
5947 /* it better be dead now */
5948 WARN_ON(!(ap->pflags & ATA_PFLAG_UNLOADED));
5950 cancel_delayed_work_sync(&ap->hotplug_task);
5953 /* clean up zpodd on port removal */
5954 ata_for_each_link(link, ap, HOST_FIRST) {
5955 ata_for_each_dev(dev, link, ALL) {
5956 if (zpodd_dev_enabled(dev))
5962 for (i = 0; i < SATA_PMP_MAX_PORTS; i++)
5963 ata_tlink_delete(&ap->pmp_link[i]);
5965 /* remove the associated SCSI host */
5966 scsi_remove_host(ap->scsi_host);
5967 ata_tport_delete(ap);
5971 * ata_host_detach - Detach all ports of an ATA host
5972 * @host: Host to detach
5974 * Detach all ports of @host.
5977 * Kernel thread context (may sleep).
5979 void ata_host_detach(struct ata_host *host)
5983 for (i = 0; i < host->n_ports; i++) {
5984 /* Ensure ata_port probe has completed */
5985 async_synchronize_cookie(host->ports[i]->cookie + 1);
5986 ata_port_detach(host->ports[i]);
5989 /* the host is dead now, dissociate ACPI */
5990 ata_acpi_dissociate(host);
5992 EXPORT_SYMBOL_GPL(ata_host_detach);
5997 * ata_pci_remove_one - PCI layer callback for device removal
5998 * @pdev: PCI device that was removed
6000 * PCI layer indicates to libata via this hook that hot-unplug or
6001 * module unload event has occurred. Detach all ports. Resource
6002 * release is handled via devres.
6005 * Inherited from PCI layer (may sleep).
6007 void ata_pci_remove_one(struct pci_dev *pdev)
6009 struct ata_host *host = pci_get_drvdata(pdev);
6011 ata_host_detach(host);
6013 EXPORT_SYMBOL_GPL(ata_pci_remove_one);
6015 void ata_pci_shutdown_one(struct pci_dev *pdev)
6017 struct ata_host *host = pci_get_drvdata(pdev);
6020 for (i = 0; i < host->n_ports; i++) {
6021 struct ata_port *ap = host->ports[i];
6023 ap->pflags |= ATA_PFLAG_FROZEN;
6025 /* Disable port interrupts */
6026 if (ap->ops->freeze)
6027 ap->ops->freeze(ap);
6029 /* Stop the port DMA engines */
6030 if (ap->ops->port_stop)
6031 ap->ops->port_stop(ap);
6034 EXPORT_SYMBOL_GPL(ata_pci_shutdown_one);
6036 /* move to PCI subsystem */
6037 int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits)
6039 unsigned long tmp = 0;
6041 switch (bits->width) {
6044 pci_read_config_byte(pdev, bits->reg, &tmp8);
6050 pci_read_config_word(pdev, bits->reg, &tmp16);
6056 pci_read_config_dword(pdev, bits->reg, &tmp32);
6067 return (tmp == bits->val) ? 1 : 0;
6069 EXPORT_SYMBOL_GPL(pci_test_config_bits);
6072 void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg)
6074 pci_save_state(pdev);
6075 pci_disable_device(pdev);
6077 if (mesg.event & PM_EVENT_SLEEP)
6078 pci_set_power_state(pdev, PCI_D3hot);
6080 EXPORT_SYMBOL_GPL(ata_pci_device_do_suspend);
6082 int ata_pci_device_do_resume(struct pci_dev *pdev)
6086 pci_set_power_state(pdev, PCI_D0);
6087 pci_restore_state(pdev);
6089 rc = pcim_enable_device(pdev);
6092 "failed to enable device after resume (%d)\n", rc);
6096 pci_set_master(pdev);
6099 EXPORT_SYMBOL_GPL(ata_pci_device_do_resume);
6101 int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg)
6103 struct ata_host *host = pci_get_drvdata(pdev);
6105 ata_host_suspend(host, mesg);
6107 ata_pci_device_do_suspend(pdev, mesg);
6111 EXPORT_SYMBOL_GPL(ata_pci_device_suspend);
6113 int ata_pci_device_resume(struct pci_dev *pdev)
6115 struct ata_host *host = pci_get_drvdata(pdev);
6118 rc = ata_pci_device_do_resume(pdev);
6120 ata_host_resume(host);
6123 EXPORT_SYMBOL_GPL(ata_pci_device_resume);
6124 #endif /* CONFIG_PM */
6125 #endif /* CONFIG_PCI */
6128 * ata_platform_remove_one - Platform layer callback for device removal
6129 * @pdev: Platform device that was removed
6131 * Platform layer indicates to libata via this hook that hot-unplug or
6132 * module unload event has occurred. Detach all ports. Resource
6133 * release is handled via devres.
6136 * Inherited from platform layer (may sleep).
6138 int ata_platform_remove_one(struct platform_device *pdev)
6140 struct ata_host *host = platform_get_drvdata(pdev);
6142 ata_host_detach(host);
6146 EXPORT_SYMBOL_GPL(ata_platform_remove_one);
6148 #ifdef CONFIG_ATA_FORCE
6149 static int __init ata_parse_force_one(char **cur,
6150 struct ata_force_ent *force_ent,
6151 const char **reason)
6153 static const struct ata_force_param force_tbl[] __initconst = {
6154 { "40c", .cbl = ATA_CBL_PATA40 },
6155 { "80c", .cbl = ATA_CBL_PATA80 },
6156 { "short40c", .cbl = ATA_CBL_PATA40_SHORT },
6157 { "unk", .cbl = ATA_CBL_PATA_UNK },
6158 { "ign", .cbl = ATA_CBL_PATA_IGN },
6159 { "sata", .cbl = ATA_CBL_SATA },
6160 { "1.5Gbps", .spd_limit = 1 },
6161 { "3.0Gbps", .spd_limit = 2 },
6162 { "noncq", .horkage_on = ATA_HORKAGE_NONCQ },
6163 { "ncq", .horkage_off = ATA_HORKAGE_NONCQ },
6164 { "noncqtrim", .horkage_on = ATA_HORKAGE_NO_NCQ_TRIM },
6165 { "ncqtrim", .horkage_off = ATA_HORKAGE_NO_NCQ_TRIM },
6166 { "noncqati", .horkage_on = ATA_HORKAGE_NO_NCQ_ON_ATI },
6167 { "ncqati", .horkage_off = ATA_HORKAGE_NO_NCQ_ON_ATI },
6168 { "dump_id", .horkage_on = ATA_HORKAGE_DUMP_ID },
6169 { "pio0", .xfer_mask = 1 << (ATA_SHIFT_PIO + 0) },
6170 { "pio1", .xfer_mask = 1 << (ATA_SHIFT_PIO + 1) },
6171 { "pio2", .xfer_mask = 1 << (ATA_SHIFT_PIO + 2) },
6172 { "pio3", .xfer_mask = 1 << (ATA_SHIFT_PIO + 3) },
6173 { "pio4", .xfer_mask = 1 << (ATA_SHIFT_PIO + 4) },
6174 { "pio5", .xfer_mask = 1 << (ATA_SHIFT_PIO + 5) },
6175 { "pio6", .xfer_mask = 1 << (ATA_SHIFT_PIO + 6) },
6176 { "mwdma0", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 0) },
6177 { "mwdma1", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 1) },
6178 { "mwdma2", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 2) },
6179 { "mwdma3", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 3) },
6180 { "mwdma4", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 4) },
6181 { "udma0", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 0) },
6182 { "udma16", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 0) },
6183 { "udma/16", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 0) },
6184 { "udma1", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 1) },
6185 { "udma25", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 1) },
6186 { "udma/25", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 1) },
6187 { "udma2", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 2) },
6188 { "udma33", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 2) },
6189 { "udma/33", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 2) },
6190 { "udma3", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 3) },
6191 { "udma44", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 3) },
6192 { "udma/44", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 3) },
6193 { "udma4", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 4) },
6194 { "udma66", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 4) },
6195 { "udma/66", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 4) },
6196 { "udma5", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 5) },
6197 { "udma100", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 5) },
6198 { "udma/100", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 5) },
6199 { "udma6", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 6) },
6200 { "udma133", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 6) },
6201 { "udma/133", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 6) },
6202 { "udma7", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 7) },
6203 { "nohrst", .lflags = ATA_LFLAG_NO_HRST },
6204 { "nosrst", .lflags = ATA_LFLAG_NO_SRST },
6205 { "norst", .lflags = ATA_LFLAG_NO_HRST | ATA_LFLAG_NO_SRST },
6206 { "rstonce", .lflags = ATA_LFLAG_RST_ONCE },
6207 { "atapi_dmadir", .horkage_on = ATA_HORKAGE_ATAPI_DMADIR },
6208 { "disable", .horkage_on = ATA_HORKAGE_DISABLE },
6210 char *start = *cur, *p = *cur;
6211 char *id, *val, *endp;
6212 const struct ata_force_param *match_fp = NULL;
6213 int nr_matches = 0, i;
6215 /* find where this param ends and update *cur */
6216 while (*p != '\0' && *p != ',')
6227 p = strchr(start, ':');
6229 val = strstrip(start);
6234 id = strstrip(start);
6235 val = strstrip(p + 1);
6238 p = strchr(id, '.');
6241 force_ent->device = simple_strtoul(p, &endp, 10);
6242 if (p == endp || *endp != '\0') {
6243 *reason = "invalid device";
6248 force_ent->port = simple_strtoul(id, &endp, 10);
6249 if (id == endp || *endp != '\0') {
6250 *reason = "invalid port/link";
6255 /* parse val, allow shortcuts so that both 1.5 and 1.5Gbps work */
6256 for (i = 0; i < ARRAY_SIZE(force_tbl); i++) {
6257 const struct ata_force_param *fp = &force_tbl[i];
6259 if (strncasecmp(val, fp->name, strlen(val)))
6265 if (strcasecmp(val, fp->name) == 0) {
6272 *reason = "unknown value";
6275 if (nr_matches > 1) {
6276 *reason = "ambiguous value";
6280 force_ent->param = *match_fp;
6285 static void __init ata_parse_force_param(void)
6287 int idx = 0, size = 1;
6288 int last_port = -1, last_device = -1;
6289 char *p, *cur, *next;
6291 /* calculate maximum number of params and allocate force_tbl */
6292 for (p = ata_force_param_buf; *p; p++)
6296 ata_force_tbl = kcalloc(size, sizeof(ata_force_tbl[0]), GFP_KERNEL);
6297 if (!ata_force_tbl) {
6298 printk(KERN_WARNING "ata: failed to extend force table, "
6299 "libata.force ignored\n");
6303 /* parse and populate the table */
6304 for (cur = ata_force_param_buf; *cur != '\0'; cur = next) {
6305 const char *reason = "";
6306 struct ata_force_ent te = { .port = -1, .device = -1 };
6309 if (ata_parse_force_one(&next, &te, &reason)) {
6310 printk(KERN_WARNING "ata: failed to parse force "
6311 "parameter \"%s\" (%s)\n",
6316 if (te.port == -1) {
6317 te.port = last_port;
6318 te.device = last_device;
6321 ata_force_tbl[idx++] = te;
6323 last_port = te.port;
6324 last_device = te.device;
6327 ata_force_tbl_size = idx;
6330 static void ata_free_force_param(void)
6332 kfree(ata_force_tbl);
6335 static inline void ata_parse_force_param(void) { }
6336 static inline void ata_free_force_param(void) { }
6339 static int __init ata_init(void)
6343 ata_parse_force_param();
6345 rc = ata_sff_init();
6347 ata_free_force_param();
6351 libata_transport_init();
6352 ata_scsi_transport_template = ata_attach_transport();
6353 if (!ata_scsi_transport_template) {
6359 printk(KERN_DEBUG "libata version " DRV_VERSION " loaded.\n");
6366 static void __exit ata_exit(void)
6368 ata_release_transport(ata_scsi_transport_template);
6369 libata_transport_exit();
6371 ata_free_force_param();
6374 subsys_initcall(ata_init);
6375 module_exit(ata_exit);
6377 static DEFINE_RATELIMIT_STATE(ratelimit, HZ / 5, 1);
6379 int ata_ratelimit(void)
6381 return __ratelimit(&ratelimit);
6383 EXPORT_SYMBOL_GPL(ata_ratelimit);
6386 * ata_msleep - ATA EH owner aware msleep
6387 * @ap: ATA port to attribute the sleep to
6388 * @msecs: duration to sleep in milliseconds
6390 * Sleeps @msecs. If the current task is owner of @ap's EH, the
6391 * ownership is released before going to sleep and reacquired
6392 * after the sleep is complete. IOW, other ports sharing the
6393 * @ap->host will be allowed to own the EH while this task is
6399 void ata_msleep(struct ata_port *ap, unsigned int msecs)
6401 bool owns_eh = ap && ap->host->eh_owner == current;
6407 unsigned long usecs = msecs * USEC_PER_MSEC;
6408 usleep_range(usecs, usecs + 50);
6416 EXPORT_SYMBOL_GPL(ata_msleep);
6419 * ata_wait_register - wait until register value changes
6420 * @ap: ATA port to wait register for, can be NULL
6421 * @reg: IO-mapped register
6422 * @mask: Mask to apply to read register value
6423 * @val: Wait condition
6424 * @interval: polling interval in milliseconds
6425 * @timeout: timeout in milliseconds
6427 * Waiting for some bits of register to change is a common
6428 * operation for ATA controllers. This function reads 32bit LE
6429 * IO-mapped register @reg and tests for the following condition.
6431 * (*@reg & mask) != val
6433 * If the condition is met, it returns; otherwise, the process is
6434 * repeated after @interval_msec until timeout.
6437 * Kernel thread context (may sleep)
6440 * The final register value.
6442 u32 ata_wait_register(struct ata_port *ap, void __iomem *reg, u32 mask, u32 val,
6443 unsigned long interval, unsigned long timeout)
6445 unsigned long deadline;
6448 tmp = ioread32(reg);
6450 /* Calculate timeout _after_ the first read to make sure
6451 * preceding writes reach the controller before starting to
6452 * eat away the timeout.
6454 deadline = ata_deadline(jiffies, timeout);
6456 while ((tmp & mask) == val && time_before(jiffies, deadline)) {
6457 ata_msleep(ap, interval);
6458 tmp = ioread32(reg);
6463 EXPORT_SYMBOL_GPL(ata_wait_register);
6468 static unsigned int ata_dummy_qc_issue(struct ata_queued_cmd *qc)
6470 return AC_ERR_SYSTEM;
6473 static void ata_dummy_error_handler(struct ata_port *ap)
6478 struct ata_port_operations ata_dummy_port_ops = {
6479 .qc_prep = ata_noop_qc_prep,
6480 .qc_issue = ata_dummy_qc_issue,
6481 .error_handler = ata_dummy_error_handler,
6482 .sched_eh = ata_std_sched_eh,
6483 .end_eh = ata_std_end_eh,
6485 EXPORT_SYMBOL_GPL(ata_dummy_port_ops);
6487 const struct ata_port_info ata_dummy_port_info = {
6488 .port_ops = &ata_dummy_port_ops,
6490 EXPORT_SYMBOL_GPL(ata_dummy_port_info);
6492 void ata_print_version(const struct device *dev, const char *version)
6494 dev_printk(KERN_DEBUG, dev, "version %s\n", version);
6496 EXPORT_SYMBOL(ata_print_version);
6498 EXPORT_TRACEPOINT_SYMBOL_GPL(ata_tf_load);
6499 EXPORT_TRACEPOINT_SYMBOL_GPL(ata_exec_command);
6500 EXPORT_TRACEPOINT_SYMBOL_GPL(ata_bmdma_setup);
6501 EXPORT_TRACEPOINT_SYMBOL_GPL(ata_bmdma_start);
6502 EXPORT_TRACEPOINT_SYMBOL_GPL(ata_bmdma_status);