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 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
768 (u32)block, track, cyl, head, sect);
770 /* Check whether the converted CHS can fit.
774 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
777 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
788 * ata_pack_xfermask - Pack pio, mwdma and udma masks into xfer_mask
789 * @pio_mask: pio_mask
790 * @mwdma_mask: mwdma_mask
791 * @udma_mask: udma_mask
793 * Pack @pio_mask, @mwdma_mask and @udma_mask into a single
794 * unsigned int xfer_mask.
802 unsigned long ata_pack_xfermask(unsigned long pio_mask,
803 unsigned long mwdma_mask,
804 unsigned long udma_mask)
806 return ((pio_mask << ATA_SHIFT_PIO) & ATA_MASK_PIO) |
807 ((mwdma_mask << ATA_SHIFT_MWDMA) & ATA_MASK_MWDMA) |
808 ((udma_mask << ATA_SHIFT_UDMA) & ATA_MASK_UDMA);
810 EXPORT_SYMBOL_GPL(ata_pack_xfermask);
813 * ata_unpack_xfermask - Unpack xfer_mask into pio, mwdma and udma masks
814 * @xfer_mask: xfer_mask to unpack
815 * @pio_mask: resulting pio_mask
816 * @mwdma_mask: resulting mwdma_mask
817 * @udma_mask: resulting udma_mask
819 * Unpack @xfer_mask into @pio_mask, @mwdma_mask and @udma_mask.
820 * Any NULL destination masks will be ignored.
822 void ata_unpack_xfermask(unsigned long xfer_mask, unsigned long *pio_mask,
823 unsigned long *mwdma_mask, unsigned long *udma_mask)
826 *pio_mask = (xfer_mask & ATA_MASK_PIO) >> ATA_SHIFT_PIO;
828 *mwdma_mask = (xfer_mask & ATA_MASK_MWDMA) >> ATA_SHIFT_MWDMA;
830 *udma_mask = (xfer_mask & ATA_MASK_UDMA) >> ATA_SHIFT_UDMA;
833 static const struct ata_xfer_ent {
837 { ATA_SHIFT_PIO, ATA_NR_PIO_MODES, XFER_PIO_0 },
838 { ATA_SHIFT_MWDMA, ATA_NR_MWDMA_MODES, XFER_MW_DMA_0 },
839 { ATA_SHIFT_UDMA, ATA_NR_UDMA_MODES, XFER_UDMA_0 },
844 * ata_xfer_mask2mode - Find matching XFER_* for the given xfer_mask
845 * @xfer_mask: xfer_mask of interest
847 * Return matching XFER_* value for @xfer_mask. Only the highest
848 * bit of @xfer_mask is considered.
854 * Matching XFER_* value, 0xff if no match found.
856 u8 ata_xfer_mask2mode(unsigned long xfer_mask)
858 int highbit = fls(xfer_mask) - 1;
859 const struct ata_xfer_ent *ent;
861 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
862 if (highbit >= ent->shift && highbit < ent->shift + ent->bits)
863 return ent->base + highbit - ent->shift;
866 EXPORT_SYMBOL_GPL(ata_xfer_mask2mode);
869 * ata_xfer_mode2mask - Find matching xfer_mask for XFER_*
870 * @xfer_mode: XFER_* of interest
872 * Return matching xfer_mask for @xfer_mode.
878 * Matching xfer_mask, 0 if no match found.
880 unsigned long ata_xfer_mode2mask(u8 xfer_mode)
882 const struct ata_xfer_ent *ent;
884 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
885 if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits)
886 return ((2 << (ent->shift + xfer_mode - ent->base)) - 1)
887 & ~((1 << ent->shift) - 1);
890 EXPORT_SYMBOL_GPL(ata_xfer_mode2mask);
893 * ata_xfer_mode2shift - Find matching xfer_shift for XFER_*
894 * @xfer_mode: XFER_* of interest
896 * Return matching xfer_shift for @xfer_mode.
902 * Matching xfer_shift, -1 if no match found.
904 int ata_xfer_mode2shift(unsigned long xfer_mode)
906 const struct ata_xfer_ent *ent;
908 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
909 if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits)
913 EXPORT_SYMBOL_GPL(ata_xfer_mode2shift);
916 * ata_mode_string - convert xfer_mask to string
917 * @xfer_mask: mask of bits supported; only highest bit counts.
919 * Determine string which represents the highest speed
920 * (highest bit in @modemask).
926 * Constant C string representing highest speed listed in
927 * @mode_mask, or the constant C string "<n/a>".
929 const char *ata_mode_string(unsigned long xfer_mask)
931 static const char * const xfer_mode_str[] = {
955 highbit = fls(xfer_mask) - 1;
956 if (highbit >= 0 && highbit < ARRAY_SIZE(xfer_mode_str))
957 return xfer_mode_str[highbit];
960 EXPORT_SYMBOL_GPL(ata_mode_string);
962 const char *sata_spd_string(unsigned int spd)
964 static const char * const spd_str[] = {
970 if (spd == 0 || (spd - 1) >= ARRAY_SIZE(spd_str))
972 return spd_str[spd - 1];
976 * ata_dev_classify - determine device type based on ATA-spec signature
977 * @tf: ATA taskfile register set for device to be identified
979 * Determine from taskfile register contents whether a device is
980 * ATA or ATAPI, as per "Signature and persistence" section
981 * of ATA/PI spec (volume 1, sect 5.14).
987 * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, %ATA_DEV_PMP,
988 * %ATA_DEV_ZAC, or %ATA_DEV_UNKNOWN the event of failure.
990 unsigned int ata_dev_classify(const struct ata_taskfile *tf)
992 /* Apple's open source Darwin code hints that some devices only
993 * put a proper signature into the LBA mid/high registers,
994 * So, we only check those. It's sufficient for uniqueness.
996 * ATA/ATAPI-7 (d1532v1r1: Feb. 19, 2003) specified separate
997 * signatures for ATA and ATAPI devices attached on SerialATA,
998 * 0x3c/0xc3 and 0x69/0x96 respectively. However, SerialATA
999 * spec has never mentioned about using different signatures
1000 * for ATA/ATAPI devices. Then, Serial ATA II: Port
1001 * Multiplier specification began to use 0x69/0x96 to identify
1002 * port multpliers and 0x3c/0xc3 to identify SEMB device.
1003 * ATA/ATAPI-7 dropped descriptions about 0x3c/0xc3 and
1004 * 0x69/0x96 shortly and described them as reserved for
1007 * We follow the current spec and consider that 0x69/0x96
1008 * identifies a port multiplier and 0x3c/0xc3 a SEMB device.
1009 * Unfortunately, WDC WD1600JS-62MHB5 (a hard drive) reports
1010 * SEMB signature. This is worked around in
1011 * ata_dev_read_id().
1013 if ((tf->lbam == 0) && (tf->lbah == 0)) {
1014 DPRINTK("found ATA device by sig\n");
1018 if ((tf->lbam == 0x14) && (tf->lbah == 0xeb)) {
1019 DPRINTK("found ATAPI device by sig\n");
1020 return ATA_DEV_ATAPI;
1023 if ((tf->lbam == 0x69) && (tf->lbah == 0x96)) {
1024 DPRINTK("found PMP device by sig\n");
1028 if ((tf->lbam == 0x3c) && (tf->lbah == 0xc3)) {
1029 DPRINTK("found SEMB device by sig (could be ATA device)\n");
1030 return ATA_DEV_SEMB;
1033 if ((tf->lbam == 0xcd) && (tf->lbah == 0xab)) {
1034 DPRINTK("found ZAC device by sig\n");
1038 DPRINTK("unknown device\n");
1039 return ATA_DEV_UNKNOWN;
1041 EXPORT_SYMBOL_GPL(ata_dev_classify);
1044 * ata_id_string - Convert IDENTIFY DEVICE page into string
1045 * @id: IDENTIFY DEVICE results we will examine
1046 * @s: string into which data is output
1047 * @ofs: offset into identify device page
1048 * @len: length of string to return. must be an even number.
1050 * The strings in the IDENTIFY DEVICE page are broken up into
1051 * 16-bit chunks. Run through the string, and output each
1052 * 8-bit chunk linearly, regardless of platform.
1058 void ata_id_string(const u16 *id, unsigned char *s,
1059 unsigned int ofs, unsigned int len)
1078 EXPORT_SYMBOL_GPL(ata_id_string);
1081 * ata_id_c_string - Convert IDENTIFY DEVICE page into C string
1082 * @id: IDENTIFY DEVICE results we will examine
1083 * @s: string into which data is output
1084 * @ofs: offset into identify device page
1085 * @len: length of string to return. must be an odd number.
1087 * This function is identical to ata_id_string except that it
1088 * trims trailing spaces and terminates the resulting string with
1089 * null. @len must be actual maximum length (even number) + 1.
1094 void ata_id_c_string(const u16 *id, unsigned char *s,
1095 unsigned int ofs, unsigned int len)
1099 ata_id_string(id, s, ofs, len - 1);
1101 p = s + strnlen(s, len - 1);
1102 while (p > s && p[-1] == ' ')
1106 EXPORT_SYMBOL_GPL(ata_id_c_string);
1108 static u64 ata_id_n_sectors(const u16 *id)
1110 if (ata_id_has_lba(id)) {
1111 if (ata_id_has_lba48(id))
1112 return ata_id_u64(id, ATA_ID_LBA_CAPACITY_2);
1114 return ata_id_u32(id, ATA_ID_LBA_CAPACITY);
1116 if (ata_id_current_chs_valid(id))
1117 return id[ATA_ID_CUR_CYLS] * id[ATA_ID_CUR_HEADS] *
1118 id[ATA_ID_CUR_SECTORS];
1120 return id[ATA_ID_CYLS] * id[ATA_ID_HEADS] *
1125 u64 ata_tf_to_lba48(const struct ata_taskfile *tf)
1129 sectors |= ((u64)(tf->hob_lbah & 0xff)) << 40;
1130 sectors |= ((u64)(tf->hob_lbam & 0xff)) << 32;
1131 sectors |= ((u64)(tf->hob_lbal & 0xff)) << 24;
1132 sectors |= (tf->lbah & 0xff) << 16;
1133 sectors |= (tf->lbam & 0xff) << 8;
1134 sectors |= (tf->lbal & 0xff);
1139 u64 ata_tf_to_lba(const struct ata_taskfile *tf)
1143 sectors |= (tf->device & 0x0f) << 24;
1144 sectors |= (tf->lbah & 0xff) << 16;
1145 sectors |= (tf->lbam & 0xff) << 8;
1146 sectors |= (tf->lbal & 0xff);
1152 * ata_read_native_max_address - Read native max address
1153 * @dev: target device
1154 * @max_sectors: out parameter for the result native max address
1156 * Perform an LBA48 or LBA28 native size query upon the device in
1160 * 0 on success, -EACCES if command is aborted by the drive.
1161 * -EIO on other errors.
1163 static int ata_read_native_max_address(struct ata_device *dev, u64 *max_sectors)
1165 unsigned int err_mask;
1166 struct ata_taskfile tf;
1167 int lba48 = ata_id_has_lba48(dev->id);
1169 ata_tf_init(dev, &tf);
1171 /* always clear all address registers */
1172 tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
1175 tf.command = ATA_CMD_READ_NATIVE_MAX_EXT;
1176 tf.flags |= ATA_TFLAG_LBA48;
1178 tf.command = ATA_CMD_READ_NATIVE_MAX;
1180 tf.protocol = ATA_PROT_NODATA;
1181 tf.device |= ATA_LBA;
1183 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
1186 "failed to read native max address (err_mask=0x%x)\n",
1188 if (err_mask == AC_ERR_DEV && (tf.feature & ATA_ABORTED))
1194 *max_sectors = ata_tf_to_lba48(&tf) + 1;
1196 *max_sectors = ata_tf_to_lba(&tf) + 1;
1197 if (dev->horkage & ATA_HORKAGE_HPA_SIZE)
1203 * ata_set_max_sectors - Set max sectors
1204 * @dev: target device
1205 * @new_sectors: new max sectors value to set for the device
1207 * Set max sectors of @dev to @new_sectors.
1210 * 0 on success, -EACCES if command is aborted or denied (due to
1211 * previous non-volatile SET_MAX) by the drive. -EIO on other
1214 static int ata_set_max_sectors(struct ata_device *dev, u64 new_sectors)
1216 unsigned int err_mask;
1217 struct ata_taskfile tf;
1218 int lba48 = ata_id_has_lba48(dev->id);
1222 ata_tf_init(dev, &tf);
1224 tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
1227 tf.command = ATA_CMD_SET_MAX_EXT;
1228 tf.flags |= ATA_TFLAG_LBA48;
1230 tf.hob_lbal = (new_sectors >> 24) & 0xff;
1231 tf.hob_lbam = (new_sectors >> 32) & 0xff;
1232 tf.hob_lbah = (new_sectors >> 40) & 0xff;
1234 tf.command = ATA_CMD_SET_MAX;
1236 tf.device |= (new_sectors >> 24) & 0xf;
1239 tf.protocol = ATA_PROT_NODATA;
1240 tf.device |= ATA_LBA;
1242 tf.lbal = (new_sectors >> 0) & 0xff;
1243 tf.lbam = (new_sectors >> 8) & 0xff;
1244 tf.lbah = (new_sectors >> 16) & 0xff;
1246 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
1249 "failed to set max address (err_mask=0x%x)\n",
1251 if (err_mask == AC_ERR_DEV &&
1252 (tf.feature & (ATA_ABORTED | ATA_IDNF)))
1261 * ata_hpa_resize - Resize a device with an HPA set
1262 * @dev: Device to resize
1264 * Read the size of an LBA28 or LBA48 disk with HPA features and resize
1265 * it if required to the full size of the media. The caller must check
1266 * the drive has the HPA feature set enabled.
1269 * 0 on success, -errno on failure.
1271 static int ata_hpa_resize(struct ata_device *dev)
1273 bool print_info = ata_dev_print_info(dev);
1274 bool unlock_hpa = ata_ignore_hpa || dev->flags & ATA_DFLAG_UNLOCK_HPA;
1275 u64 sectors = ata_id_n_sectors(dev->id);
1279 /* do we need to do it? */
1280 if ((dev->class != ATA_DEV_ATA && dev->class != ATA_DEV_ZAC) ||
1281 !ata_id_has_lba(dev->id) || !ata_id_hpa_enabled(dev->id) ||
1282 (dev->horkage & ATA_HORKAGE_BROKEN_HPA))
1285 /* read native max address */
1286 rc = ata_read_native_max_address(dev, &native_sectors);
1288 /* If device aborted the command or HPA isn't going to
1289 * be unlocked, skip HPA resizing.
1291 if (rc == -EACCES || !unlock_hpa) {
1293 "HPA support seems broken, skipping HPA handling\n");
1294 dev->horkage |= ATA_HORKAGE_BROKEN_HPA;
1296 /* we can continue if device aborted the command */
1303 dev->n_native_sectors = native_sectors;
1305 /* nothing to do? */
1306 if (native_sectors <= sectors || !unlock_hpa) {
1307 if (!print_info || native_sectors == sectors)
1310 if (native_sectors > sectors)
1312 "HPA detected: current %llu, native %llu\n",
1313 (unsigned long long)sectors,
1314 (unsigned long long)native_sectors);
1315 else if (native_sectors < sectors)
1317 "native sectors (%llu) is smaller than sectors (%llu)\n",
1318 (unsigned long long)native_sectors,
1319 (unsigned long long)sectors);
1323 /* let's unlock HPA */
1324 rc = ata_set_max_sectors(dev, native_sectors);
1325 if (rc == -EACCES) {
1326 /* if device aborted the command, skip HPA resizing */
1328 "device aborted resize (%llu -> %llu), skipping HPA handling\n",
1329 (unsigned long long)sectors,
1330 (unsigned long long)native_sectors);
1331 dev->horkage |= ATA_HORKAGE_BROKEN_HPA;
1336 /* re-read IDENTIFY data */
1337 rc = ata_dev_reread_id(dev, 0);
1340 "failed to re-read IDENTIFY data after HPA resizing\n");
1345 u64 new_sectors = ata_id_n_sectors(dev->id);
1347 "HPA unlocked: %llu -> %llu, native %llu\n",
1348 (unsigned long long)sectors,
1349 (unsigned long long)new_sectors,
1350 (unsigned long long)native_sectors);
1357 * ata_dump_id - IDENTIFY DEVICE info debugging output
1358 * @id: IDENTIFY DEVICE page to dump
1360 * Dump selected 16-bit words from the given IDENTIFY DEVICE
1367 static inline void ata_dump_id(const u16 *id)
1369 DPRINTK("49==0x%04x "
1379 DPRINTK("80==0x%04x "
1389 DPRINTK("88==0x%04x "
1396 * ata_id_xfermask - Compute xfermask from the given IDENTIFY data
1397 * @id: IDENTIFY data to compute xfer mask from
1399 * Compute the xfermask for this device. This is not as trivial
1400 * as it seems if we must consider early devices correctly.
1402 * FIXME: pre IDE drive timing (do we care ?).
1410 unsigned long ata_id_xfermask(const u16 *id)
1412 unsigned long pio_mask, mwdma_mask, udma_mask;
1414 /* Usual case. Word 53 indicates word 64 is valid */
1415 if (id[ATA_ID_FIELD_VALID] & (1 << 1)) {
1416 pio_mask = id[ATA_ID_PIO_MODES] & 0x03;
1420 /* If word 64 isn't valid then Word 51 high byte holds
1421 * the PIO timing number for the maximum. Turn it into
1424 u8 mode = (id[ATA_ID_OLD_PIO_MODES] >> 8) & 0xFF;
1425 if (mode < 5) /* Valid PIO range */
1426 pio_mask = (2 << mode) - 1;
1430 /* But wait.. there's more. Design your standards by
1431 * committee and you too can get a free iordy field to
1432 * process. However its the speeds not the modes that
1433 * are supported... Note drivers using the timing API
1434 * will get this right anyway
1438 mwdma_mask = id[ATA_ID_MWDMA_MODES] & 0x07;
1440 if (ata_id_is_cfa(id)) {
1442 * Process compact flash extended modes
1444 int pio = (id[ATA_ID_CFA_MODES] >> 0) & 0x7;
1445 int dma = (id[ATA_ID_CFA_MODES] >> 3) & 0x7;
1448 pio_mask |= (1 << 5);
1450 pio_mask |= (1 << 6);
1452 mwdma_mask |= (1 << 3);
1454 mwdma_mask |= (1 << 4);
1458 if (id[ATA_ID_FIELD_VALID] & (1 << 2))
1459 udma_mask = id[ATA_ID_UDMA_MODES] & 0xff;
1461 return ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask);
1463 EXPORT_SYMBOL_GPL(ata_id_xfermask);
1465 static void ata_qc_complete_internal(struct ata_queued_cmd *qc)
1467 struct completion *waiting = qc->private_data;
1473 * ata_exec_internal_sg - execute libata internal command
1474 * @dev: Device to which the command is sent
1475 * @tf: Taskfile registers for the command and the result
1476 * @cdb: CDB for packet command
1477 * @dma_dir: Data transfer direction of the command
1478 * @sgl: sg list for the data buffer of the command
1479 * @n_elem: Number of sg entries
1480 * @timeout: Timeout in msecs (0 for default)
1482 * Executes libata internal command with timeout. @tf contains
1483 * command on entry and result on return. Timeout and error
1484 * conditions are reported via return value. No recovery action
1485 * is taken after a command times out. It's caller's duty to
1486 * clean up after timeout.
1489 * None. Should be called with kernel context, might sleep.
1492 * Zero on success, AC_ERR_* mask on failure
1494 unsigned ata_exec_internal_sg(struct ata_device *dev,
1495 struct ata_taskfile *tf, const u8 *cdb,
1496 int dma_dir, struct scatterlist *sgl,
1497 unsigned int n_elem, unsigned long timeout)
1499 struct ata_link *link = dev->link;
1500 struct ata_port *ap = link->ap;
1501 u8 command = tf->command;
1502 int auto_timeout = 0;
1503 struct ata_queued_cmd *qc;
1504 unsigned int preempted_tag;
1505 u32 preempted_sactive;
1506 u64 preempted_qc_active;
1507 int preempted_nr_active_links;
1508 DECLARE_COMPLETION_ONSTACK(wait);
1509 unsigned long flags;
1510 unsigned int err_mask;
1513 spin_lock_irqsave(ap->lock, flags);
1515 /* no internal command while frozen */
1516 if (ap->pflags & ATA_PFLAG_FROZEN) {
1517 spin_unlock_irqrestore(ap->lock, flags);
1518 return AC_ERR_SYSTEM;
1521 /* initialize internal qc */
1522 qc = __ata_qc_from_tag(ap, ATA_TAG_INTERNAL);
1524 qc->tag = ATA_TAG_INTERNAL;
1531 preempted_tag = link->active_tag;
1532 preempted_sactive = link->sactive;
1533 preempted_qc_active = ap->qc_active;
1534 preempted_nr_active_links = ap->nr_active_links;
1535 link->active_tag = ATA_TAG_POISON;
1538 ap->nr_active_links = 0;
1540 /* prepare & issue qc */
1543 memcpy(qc->cdb, cdb, ATAPI_CDB_LEN);
1545 /* some SATA bridges need us to indicate data xfer direction */
1546 if (tf->protocol == ATAPI_PROT_DMA && (dev->flags & ATA_DFLAG_DMADIR) &&
1547 dma_dir == DMA_FROM_DEVICE)
1548 qc->tf.feature |= ATAPI_DMADIR;
1550 qc->flags |= ATA_QCFLAG_RESULT_TF;
1551 qc->dma_dir = dma_dir;
1552 if (dma_dir != DMA_NONE) {
1553 unsigned int i, buflen = 0;
1554 struct scatterlist *sg;
1556 for_each_sg(sgl, sg, n_elem, i)
1557 buflen += sg->length;
1559 ata_sg_init(qc, sgl, n_elem);
1560 qc->nbytes = buflen;
1563 qc->private_data = &wait;
1564 qc->complete_fn = ata_qc_complete_internal;
1568 spin_unlock_irqrestore(ap->lock, flags);
1571 if (ata_probe_timeout)
1572 timeout = ata_probe_timeout * 1000;
1574 timeout = ata_internal_cmd_timeout(dev, command);
1579 if (ap->ops->error_handler)
1582 rc = wait_for_completion_timeout(&wait, msecs_to_jiffies(timeout));
1584 if (ap->ops->error_handler)
1587 ata_sff_flush_pio_task(ap);
1590 spin_lock_irqsave(ap->lock, flags);
1592 /* We're racing with irq here. If we lose, the
1593 * following test prevents us from completing the qc
1594 * twice. If we win, the port is frozen and will be
1595 * cleaned up by ->post_internal_cmd().
1597 if (qc->flags & ATA_QCFLAG_ACTIVE) {
1598 qc->err_mask |= AC_ERR_TIMEOUT;
1600 if (ap->ops->error_handler)
1601 ata_port_freeze(ap);
1603 ata_qc_complete(qc);
1605 if (ata_msg_warn(ap))
1606 ata_dev_warn(dev, "qc timeout (cmd 0x%x)\n",
1610 spin_unlock_irqrestore(ap->lock, flags);
1613 /* do post_internal_cmd */
1614 if (ap->ops->post_internal_cmd)
1615 ap->ops->post_internal_cmd(qc);
1617 /* perform minimal error analysis */
1618 if (qc->flags & ATA_QCFLAG_FAILED) {
1619 if (qc->result_tf.command & (ATA_ERR | ATA_DF))
1620 qc->err_mask |= AC_ERR_DEV;
1623 qc->err_mask |= AC_ERR_OTHER;
1625 if (qc->err_mask & ~AC_ERR_OTHER)
1626 qc->err_mask &= ~AC_ERR_OTHER;
1627 } else if (qc->tf.command == ATA_CMD_REQ_SENSE_DATA) {
1628 qc->result_tf.command |= ATA_SENSE;
1632 spin_lock_irqsave(ap->lock, flags);
1634 *tf = qc->result_tf;
1635 err_mask = qc->err_mask;
1638 link->active_tag = preempted_tag;
1639 link->sactive = preempted_sactive;
1640 ap->qc_active = preempted_qc_active;
1641 ap->nr_active_links = preempted_nr_active_links;
1643 spin_unlock_irqrestore(ap->lock, flags);
1645 if ((err_mask & AC_ERR_TIMEOUT) && auto_timeout)
1646 ata_internal_cmd_timed_out(dev, command);
1652 * ata_exec_internal - execute libata internal command
1653 * @dev: Device to which the command is sent
1654 * @tf: Taskfile registers for the command and the result
1655 * @cdb: CDB for packet command
1656 * @dma_dir: Data transfer direction of the command
1657 * @buf: Data buffer of the command
1658 * @buflen: Length of data buffer
1659 * @timeout: Timeout in msecs (0 for default)
1661 * Wrapper around ata_exec_internal_sg() which takes simple
1662 * buffer instead of sg list.
1665 * None. Should be called with kernel context, might sleep.
1668 * Zero on success, AC_ERR_* mask on failure
1670 unsigned ata_exec_internal(struct ata_device *dev,
1671 struct ata_taskfile *tf, const u8 *cdb,
1672 int dma_dir, void *buf, unsigned int buflen,
1673 unsigned long timeout)
1675 struct scatterlist *psg = NULL, sg;
1676 unsigned int n_elem = 0;
1678 if (dma_dir != DMA_NONE) {
1680 sg_init_one(&sg, buf, buflen);
1685 return ata_exec_internal_sg(dev, tf, cdb, dma_dir, psg, n_elem,
1690 * ata_pio_need_iordy - check if iordy needed
1693 * Check if the current speed of the device requires IORDY. Used
1694 * by various controllers for chip configuration.
1696 unsigned int ata_pio_need_iordy(const struct ata_device *adev)
1698 /* Don't set IORDY if we're preparing for reset. IORDY may
1699 * lead to controller lock up on certain controllers if the
1700 * port is not occupied. See bko#11703 for details.
1702 if (adev->link->ap->pflags & ATA_PFLAG_RESETTING)
1704 /* Controller doesn't support IORDY. Probably a pointless
1705 * check as the caller should know this.
1707 if (adev->link->ap->flags & ATA_FLAG_NO_IORDY)
1709 /* CF spec. r4.1 Table 22 says no iordy on PIO5 and PIO6. */
1710 if (ata_id_is_cfa(adev->id)
1711 && (adev->pio_mode == XFER_PIO_5 || adev->pio_mode == XFER_PIO_6))
1713 /* PIO3 and higher it is mandatory */
1714 if (adev->pio_mode > XFER_PIO_2)
1716 /* We turn it on when possible */
1717 if (ata_id_has_iordy(adev->id))
1721 EXPORT_SYMBOL_GPL(ata_pio_need_iordy);
1724 * ata_pio_mask_no_iordy - Return the non IORDY mask
1727 * Compute the highest mode possible if we are not using iordy. Return
1728 * -1 if no iordy mode is available.
1730 static u32 ata_pio_mask_no_iordy(const struct ata_device *adev)
1732 /* If we have no drive specific rule, then PIO 2 is non IORDY */
1733 if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE */
1734 u16 pio = adev->id[ATA_ID_EIDE_PIO];
1735 /* Is the speed faster than the drive allows non IORDY ? */
1737 /* This is cycle times not frequency - watch the logic! */
1738 if (pio > 240) /* PIO2 is 240nS per cycle */
1739 return 3 << ATA_SHIFT_PIO;
1740 return 7 << ATA_SHIFT_PIO;
1743 return 3 << ATA_SHIFT_PIO;
1747 * ata_do_dev_read_id - default ID read method
1749 * @tf: proposed taskfile
1752 * Issue the identify taskfile and hand back the buffer containing
1753 * identify data. For some RAID controllers and for pre ATA devices
1754 * this function is wrapped or replaced by the driver
1756 unsigned int ata_do_dev_read_id(struct ata_device *dev,
1757 struct ata_taskfile *tf, u16 *id)
1759 return ata_exec_internal(dev, tf, NULL, DMA_FROM_DEVICE,
1760 id, sizeof(id[0]) * ATA_ID_WORDS, 0);
1762 EXPORT_SYMBOL_GPL(ata_do_dev_read_id);
1765 * ata_dev_read_id - Read ID data from the specified device
1766 * @dev: target device
1767 * @p_class: pointer to class of the target device (may be changed)
1768 * @flags: ATA_READID_* flags
1769 * @id: buffer to read IDENTIFY data into
1771 * Read ID data from the specified device. ATA_CMD_ID_ATA is
1772 * performed on ATA devices and ATA_CMD_ID_ATAPI on ATAPI
1773 * devices. This function also issues ATA_CMD_INIT_DEV_PARAMS
1774 * for pre-ATA4 drives.
1776 * FIXME: ATA_CMD_ID_ATA is optional for early drives and right
1777 * now we abort if we hit that case.
1780 * Kernel thread context (may sleep)
1783 * 0 on success, -errno otherwise.
1785 int ata_dev_read_id(struct ata_device *dev, unsigned int *p_class,
1786 unsigned int flags, u16 *id)
1788 struct ata_port *ap = dev->link->ap;
1789 unsigned int class = *p_class;
1790 struct ata_taskfile tf;
1791 unsigned int err_mask = 0;
1793 bool is_semb = class == ATA_DEV_SEMB;
1794 int may_fallback = 1, tried_spinup = 0;
1797 if (ata_msg_ctl(ap))
1798 ata_dev_dbg(dev, "%s: ENTER\n", __func__);
1801 ata_tf_init(dev, &tf);
1805 class = ATA_DEV_ATA; /* some hard drives report SEMB sig */
1809 tf.command = ATA_CMD_ID_ATA;
1812 tf.command = ATA_CMD_ID_ATAPI;
1816 reason = "unsupported class";
1820 tf.protocol = ATA_PROT_PIO;
1822 /* Some devices choke if TF registers contain garbage. Make
1823 * sure those are properly initialized.
1825 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
1827 /* Device presence detection is unreliable on some
1828 * controllers. Always poll IDENTIFY if available.
1830 tf.flags |= ATA_TFLAG_POLLING;
1832 if (ap->ops->read_id)
1833 err_mask = ap->ops->read_id(dev, &tf, id);
1835 err_mask = ata_do_dev_read_id(dev, &tf, id);
1838 if (err_mask & AC_ERR_NODEV_HINT) {
1839 ata_dev_dbg(dev, "NODEV after polling detection\n");
1845 "IDENTIFY failed on device w/ SEMB sig, disabled\n");
1846 /* SEMB is not supported yet */
1847 *p_class = ATA_DEV_SEMB_UNSUP;
1851 if ((err_mask == AC_ERR_DEV) && (tf.feature & ATA_ABORTED)) {
1852 /* Device or controller might have reported
1853 * the wrong device class. Give a shot at the
1854 * other IDENTIFY if the current one is
1855 * aborted by the device.
1860 if (class == ATA_DEV_ATA)
1861 class = ATA_DEV_ATAPI;
1863 class = ATA_DEV_ATA;
1867 /* Control reaches here iff the device aborted
1868 * both flavors of IDENTIFYs which happens
1869 * sometimes with phantom devices.
1872 "both IDENTIFYs aborted, assuming NODEV\n");
1877 reason = "I/O error";
1881 if (dev->horkage & ATA_HORKAGE_DUMP_ID) {
1882 ata_dev_dbg(dev, "dumping IDENTIFY data, "
1883 "class=%d may_fallback=%d tried_spinup=%d\n",
1884 class, may_fallback, tried_spinup);
1885 print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET,
1886 16, 2, id, ATA_ID_WORDS * sizeof(*id), true);
1889 /* Falling back doesn't make sense if ID data was read
1890 * successfully at least once.
1894 swap_buf_le16(id, ATA_ID_WORDS);
1898 reason = "device reports invalid type";
1900 if (class == ATA_DEV_ATA || class == ATA_DEV_ZAC) {
1901 if (!ata_id_is_ata(id) && !ata_id_is_cfa(id))
1903 if (ap->host->flags & ATA_HOST_IGNORE_ATA &&
1904 ata_id_is_ata(id)) {
1906 "host indicates ignore ATA devices, ignored\n");
1910 if (ata_id_is_ata(id))
1914 if (!tried_spinup && (id[2] == 0x37c8 || id[2] == 0x738c)) {
1917 * Drive powered-up in standby mode, and requires a specific
1918 * SET_FEATURES spin-up subcommand before it will accept
1919 * anything other than the original IDENTIFY command.
1921 err_mask = ata_dev_set_feature(dev, SETFEATURES_SPINUP, 0);
1922 if (err_mask && id[2] != 0x738c) {
1924 reason = "SPINUP failed";
1928 * If the drive initially returned incomplete IDENTIFY info,
1929 * we now must reissue the IDENTIFY command.
1931 if (id[2] == 0x37c8)
1935 if ((flags & ATA_READID_POSTRESET) &&
1936 (class == ATA_DEV_ATA || class == ATA_DEV_ZAC)) {
1938 * The exact sequence expected by certain pre-ATA4 drives is:
1940 * IDENTIFY (optional in early ATA)
1941 * INITIALIZE DEVICE PARAMETERS (later IDE and ATA)
1943 * Some drives were very specific about that exact sequence.
1945 * Note that ATA4 says lba is mandatory so the second check
1946 * should never trigger.
1948 if (ata_id_major_version(id) < 4 || !ata_id_has_lba(id)) {
1949 err_mask = ata_dev_init_params(dev, id[3], id[6]);
1952 reason = "INIT_DEV_PARAMS failed";
1956 /* current CHS translation info (id[53-58]) might be
1957 * changed. reread the identify device info.
1959 flags &= ~ATA_READID_POSTRESET;
1969 if (ata_msg_warn(ap))
1970 ata_dev_warn(dev, "failed to IDENTIFY (%s, err_mask=0x%x)\n",
1976 * ata_read_log_page - read a specific log page
1977 * @dev: target device
1979 * @page: page to read
1980 * @buf: buffer to store read page
1981 * @sectors: number of sectors to read
1983 * Read log page using READ_LOG_EXT command.
1986 * Kernel thread context (may sleep).
1989 * 0 on success, AC_ERR_* mask otherwise.
1991 unsigned int ata_read_log_page(struct ata_device *dev, u8 log,
1992 u8 page, void *buf, unsigned int sectors)
1994 unsigned long ap_flags = dev->link->ap->flags;
1995 struct ata_taskfile tf;
1996 unsigned int err_mask;
1999 DPRINTK("read log page - log 0x%x, page 0x%x\n", log, page);
2002 * Return error without actually issuing the command on controllers
2003 * which e.g. lockup on a read log page.
2005 if (ap_flags & ATA_FLAG_NO_LOG_PAGE)
2009 ata_tf_init(dev, &tf);
2010 if (dev->dma_mode && ata_id_has_read_log_dma_ext(dev->id) &&
2011 !(dev->horkage & ATA_HORKAGE_NO_DMA_LOG)) {
2012 tf.command = ATA_CMD_READ_LOG_DMA_EXT;
2013 tf.protocol = ATA_PROT_DMA;
2016 tf.command = ATA_CMD_READ_LOG_EXT;
2017 tf.protocol = ATA_PROT_PIO;
2023 tf.hob_nsect = sectors >> 8;
2024 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_LBA48 | ATA_TFLAG_DEVICE;
2026 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_FROM_DEVICE,
2027 buf, sectors * ATA_SECT_SIZE, 0);
2031 dev->horkage |= ATA_HORKAGE_NO_DMA_LOG;
2034 ata_dev_err(dev, "Read log page 0x%02x failed, Emask 0x%x\n",
2035 (unsigned int)page, err_mask);
2041 static bool ata_log_supported(struct ata_device *dev, u8 log)
2043 struct ata_port *ap = dev->link->ap;
2045 if (ata_read_log_page(dev, ATA_LOG_DIRECTORY, 0, ap->sector_buf, 1))
2047 return get_unaligned_le16(&ap->sector_buf[log * 2]) ? true : false;
2050 static bool ata_identify_page_supported(struct ata_device *dev, u8 page)
2052 struct ata_port *ap = dev->link->ap;
2053 unsigned int err, i;
2055 if (!ata_log_supported(dev, ATA_LOG_IDENTIFY_DEVICE)) {
2056 ata_dev_warn(dev, "ATA Identify Device Log not supported\n");
2061 * Read IDENTIFY DEVICE data log, page 0, to figure out if the page is
2064 err = ata_read_log_page(dev, ATA_LOG_IDENTIFY_DEVICE, 0, ap->sector_buf,
2069 for (i = 0; i < ap->sector_buf[8]; i++) {
2070 if (ap->sector_buf[9 + i] == page)
2077 static int ata_do_link_spd_horkage(struct ata_device *dev)
2079 struct ata_link *plink = ata_dev_phys_link(dev);
2080 u32 target, target_limit;
2082 if (!sata_scr_valid(plink))
2085 if (dev->horkage & ATA_HORKAGE_1_5_GBPS)
2090 target_limit = (1 << target) - 1;
2092 /* if already on stricter limit, no need to push further */
2093 if (plink->sata_spd_limit <= target_limit)
2096 plink->sata_spd_limit = target_limit;
2098 /* Request another EH round by returning -EAGAIN if link is
2099 * going faster than the target speed. Forward progress is
2100 * guaranteed by setting sata_spd_limit to target_limit above.
2102 if (plink->sata_spd > target) {
2103 ata_dev_info(dev, "applying link speed limit horkage to %s\n",
2104 sata_spd_string(target));
2110 static inline u8 ata_dev_knobble(struct ata_device *dev)
2112 struct ata_port *ap = dev->link->ap;
2114 if (ata_dev_blacklisted(dev) & ATA_HORKAGE_BRIDGE_OK)
2117 return ((ap->cbl == ATA_CBL_SATA) && (!ata_id_is_sata(dev->id)));
2120 static void ata_dev_config_ncq_send_recv(struct ata_device *dev)
2122 struct ata_port *ap = dev->link->ap;
2123 unsigned int err_mask;
2125 if (!ata_log_supported(dev, ATA_LOG_NCQ_SEND_RECV)) {
2126 ata_dev_warn(dev, "NCQ Send/Recv Log not supported\n");
2129 err_mask = ata_read_log_page(dev, ATA_LOG_NCQ_SEND_RECV,
2130 0, ap->sector_buf, 1);
2132 u8 *cmds = dev->ncq_send_recv_cmds;
2134 dev->flags |= ATA_DFLAG_NCQ_SEND_RECV;
2135 memcpy(cmds, ap->sector_buf, ATA_LOG_NCQ_SEND_RECV_SIZE);
2137 if (dev->horkage & ATA_HORKAGE_NO_NCQ_TRIM) {
2138 ata_dev_dbg(dev, "disabling queued TRIM support\n");
2139 cmds[ATA_LOG_NCQ_SEND_RECV_DSM_OFFSET] &=
2140 ~ATA_LOG_NCQ_SEND_RECV_DSM_TRIM;
2145 static void ata_dev_config_ncq_non_data(struct ata_device *dev)
2147 struct ata_port *ap = dev->link->ap;
2148 unsigned int err_mask;
2150 if (!ata_log_supported(dev, ATA_LOG_NCQ_NON_DATA)) {
2152 "NCQ Send/Recv Log not supported\n");
2155 err_mask = ata_read_log_page(dev, ATA_LOG_NCQ_NON_DATA,
2156 0, ap->sector_buf, 1);
2158 u8 *cmds = dev->ncq_non_data_cmds;
2160 memcpy(cmds, ap->sector_buf, ATA_LOG_NCQ_NON_DATA_SIZE);
2164 static void ata_dev_config_ncq_prio(struct ata_device *dev)
2166 struct ata_port *ap = dev->link->ap;
2167 unsigned int err_mask;
2169 err_mask = ata_read_log_page(dev,
2170 ATA_LOG_IDENTIFY_DEVICE,
2171 ATA_LOG_SATA_SETTINGS,
2177 if (!(ap->sector_buf[ATA_LOG_NCQ_PRIO_OFFSET] & BIT(3)))
2180 dev->flags |= ATA_DFLAG_NCQ_PRIO;
2185 dev->flags &= ~ATA_DFLAG_NCQ_PRIO_ENABLE;
2186 dev->flags &= ~ATA_DFLAG_NCQ_PRIO;
2189 static int ata_dev_config_ncq(struct ata_device *dev,
2190 char *desc, size_t desc_sz)
2192 struct ata_port *ap = dev->link->ap;
2193 int hdepth = 0, ddepth = ata_id_queue_depth(dev->id);
2194 unsigned int err_mask;
2197 if (!ata_id_has_ncq(dev->id)) {
2201 if (!IS_ENABLED(CONFIG_SATA_HOST))
2203 if (dev->horkage & ATA_HORKAGE_NONCQ) {
2204 snprintf(desc, desc_sz, "NCQ (not used)");
2207 if (ap->flags & ATA_FLAG_NCQ) {
2208 hdepth = min(ap->scsi_host->can_queue, ATA_MAX_QUEUE);
2209 dev->flags |= ATA_DFLAG_NCQ;
2212 if (!(dev->horkage & ATA_HORKAGE_BROKEN_FPDMA_AA) &&
2213 (ap->flags & ATA_FLAG_FPDMA_AA) &&
2214 ata_id_has_fpdma_aa(dev->id)) {
2215 err_mask = ata_dev_set_feature(dev, SETFEATURES_SATA_ENABLE,
2219 "failed to enable AA (error_mask=0x%x)\n",
2221 if (err_mask != AC_ERR_DEV) {
2222 dev->horkage |= ATA_HORKAGE_BROKEN_FPDMA_AA;
2229 if (hdepth >= ddepth)
2230 snprintf(desc, desc_sz, "NCQ (depth %d)%s", ddepth, aa_desc);
2232 snprintf(desc, desc_sz, "NCQ (depth %d/%d)%s", hdepth,
2235 if ((ap->flags & ATA_FLAG_FPDMA_AUX)) {
2236 if (ata_id_has_ncq_send_and_recv(dev->id))
2237 ata_dev_config_ncq_send_recv(dev);
2238 if (ata_id_has_ncq_non_data(dev->id))
2239 ata_dev_config_ncq_non_data(dev);
2240 if (ata_id_has_ncq_prio(dev->id))
2241 ata_dev_config_ncq_prio(dev);
2247 static void ata_dev_config_sense_reporting(struct ata_device *dev)
2249 unsigned int err_mask;
2251 if (!ata_id_has_sense_reporting(dev->id))
2254 if (ata_id_sense_reporting_enabled(dev->id))
2257 err_mask = ata_dev_set_feature(dev, SETFEATURE_SENSE_DATA, 0x1);
2260 "failed to enable Sense Data Reporting, Emask 0x%x\n",
2265 static void ata_dev_config_zac(struct ata_device *dev)
2267 struct ata_port *ap = dev->link->ap;
2268 unsigned int err_mask;
2269 u8 *identify_buf = ap->sector_buf;
2271 dev->zac_zones_optimal_open = U32_MAX;
2272 dev->zac_zones_optimal_nonseq = U32_MAX;
2273 dev->zac_zones_max_open = U32_MAX;
2276 * Always set the 'ZAC' flag for Host-managed devices.
2278 if (dev->class == ATA_DEV_ZAC)
2279 dev->flags |= ATA_DFLAG_ZAC;
2280 else if (ata_id_zoned_cap(dev->id) == 0x01)
2282 * Check for host-aware devices.
2284 dev->flags |= ATA_DFLAG_ZAC;
2286 if (!(dev->flags & ATA_DFLAG_ZAC))
2289 if (!ata_identify_page_supported(dev, ATA_LOG_ZONED_INFORMATION)) {
2291 "ATA Zoned Information Log not supported\n");
2296 * Read IDENTIFY DEVICE data log, page 9 (Zoned-device information)
2298 err_mask = ata_read_log_page(dev, ATA_LOG_IDENTIFY_DEVICE,
2299 ATA_LOG_ZONED_INFORMATION,
2302 u64 zoned_cap, opt_open, opt_nonseq, max_open;
2304 zoned_cap = get_unaligned_le64(&identify_buf[8]);
2305 if ((zoned_cap >> 63))
2306 dev->zac_zoned_cap = (zoned_cap & 1);
2307 opt_open = get_unaligned_le64(&identify_buf[24]);
2308 if ((opt_open >> 63))
2309 dev->zac_zones_optimal_open = (u32)opt_open;
2310 opt_nonseq = get_unaligned_le64(&identify_buf[32]);
2311 if ((opt_nonseq >> 63))
2312 dev->zac_zones_optimal_nonseq = (u32)opt_nonseq;
2313 max_open = get_unaligned_le64(&identify_buf[40]);
2314 if ((max_open >> 63))
2315 dev->zac_zones_max_open = (u32)max_open;
2319 static void ata_dev_config_trusted(struct ata_device *dev)
2321 struct ata_port *ap = dev->link->ap;
2325 if (!ata_id_has_trusted(dev->id))
2328 if (!ata_identify_page_supported(dev, ATA_LOG_SECURITY)) {
2330 "Security Log not supported\n");
2334 err = ata_read_log_page(dev, ATA_LOG_IDENTIFY_DEVICE, ATA_LOG_SECURITY,
2339 trusted_cap = get_unaligned_le64(&ap->sector_buf[40]);
2340 if (!(trusted_cap & (1ULL << 63))) {
2342 "Trusted Computing capability qword not valid!\n");
2346 if (trusted_cap & (1 << 0))
2347 dev->flags |= ATA_DFLAG_TRUSTED;
2350 static int ata_dev_config_lba(struct ata_device *dev)
2352 struct ata_port *ap = dev->link->ap;
2353 const u16 *id = dev->id;
2354 const char *lba_desc;
2358 dev->flags |= ATA_DFLAG_LBA;
2360 if (ata_id_has_lba48(id)) {
2362 dev->flags |= ATA_DFLAG_LBA48;
2363 if (dev->n_sectors >= (1UL << 28) &&
2364 ata_id_has_flush_ext(id))
2365 dev->flags |= ATA_DFLAG_FLUSH_EXT;
2371 ret = ata_dev_config_ncq(dev, ncq_desc, sizeof(ncq_desc));
2373 /* print device info to dmesg */
2374 if (ata_msg_drv(ap) && ata_dev_print_info(dev))
2376 "%llu sectors, multi %u: %s %s\n",
2377 (unsigned long long)dev->n_sectors,
2378 dev->multi_count, lba_desc, ncq_desc);
2383 static void ata_dev_config_chs(struct ata_device *dev)
2385 struct ata_port *ap = dev->link->ap;
2386 const u16 *id = dev->id;
2388 if (ata_id_current_chs_valid(id)) {
2389 /* Current CHS translation is valid. */
2390 dev->cylinders = id[54];
2391 dev->heads = id[55];
2392 dev->sectors = id[56];
2394 /* Default translation */
2395 dev->cylinders = id[1];
2397 dev->sectors = id[6];
2400 /* print device info to dmesg */
2401 if (ata_msg_drv(ap) && ata_dev_print_info(dev))
2403 "%llu sectors, multi %u, CHS %u/%u/%u\n",
2404 (unsigned long long)dev->n_sectors,
2405 dev->multi_count, dev->cylinders,
2406 dev->heads, dev->sectors);
2409 static void ata_dev_config_devslp(struct ata_device *dev)
2411 u8 *sata_setting = dev->link->ap->sector_buf;
2412 unsigned int err_mask;
2416 * Check device sleep capability. Get DevSlp timing variables
2417 * from SATA Settings page of Identify Device Data Log.
2419 if (!ata_id_has_devslp(dev->id))
2422 err_mask = ata_read_log_page(dev,
2423 ATA_LOG_IDENTIFY_DEVICE,
2424 ATA_LOG_SATA_SETTINGS,
2429 dev->flags |= ATA_DFLAG_DEVSLP;
2430 for (i = 0; i < ATA_LOG_DEVSLP_SIZE; i++) {
2431 j = ATA_LOG_DEVSLP_OFFSET + i;
2432 dev->devslp_timing[i] = sata_setting[j];
2436 static void ata_dev_print_features(struct ata_device *dev)
2438 if (!(dev->flags & ATA_DFLAG_FEATURES_MASK))
2442 "Features:%s%s%s%s%s\n",
2443 dev->flags & ATA_DFLAG_TRUSTED ? " Trust" : "",
2444 dev->flags & ATA_DFLAG_DA ? " Dev-Attention" : "",
2445 dev->flags & ATA_DFLAG_DEVSLP ? " Dev-Sleep" : "",
2446 dev->flags & ATA_DFLAG_NCQ_SEND_RECV ? " NCQ-sndrcv" : "",
2447 dev->flags & ATA_DFLAG_NCQ_PRIO ? " NCQ-prio" : "");
2451 * ata_dev_configure - Configure the specified ATA/ATAPI device
2452 * @dev: Target device to configure
2454 * Configure @dev according to @dev->id. Generic and low-level
2455 * driver specific fixups are also applied.
2458 * Kernel thread context (may sleep)
2461 * 0 on success, -errno otherwise
2463 int ata_dev_configure(struct ata_device *dev)
2465 struct ata_port *ap = dev->link->ap;
2466 bool print_info = ata_dev_print_info(dev);
2467 const u16 *id = dev->id;
2468 unsigned long xfer_mask;
2469 unsigned int err_mask;
2470 char revbuf[7]; /* XYZ-99\0 */
2471 char fwrevbuf[ATA_ID_FW_REV_LEN+1];
2472 char modelbuf[ATA_ID_PROD_LEN+1];
2475 if (!ata_dev_enabled(dev) && ata_msg_info(ap)) {
2476 ata_dev_info(dev, "%s: ENTER/EXIT -- nodev\n", __func__);
2480 if (ata_msg_probe(ap))
2481 ata_dev_dbg(dev, "%s: ENTER\n", __func__);
2484 dev->horkage |= ata_dev_blacklisted(dev);
2485 ata_force_horkage(dev);
2487 if (dev->horkage & ATA_HORKAGE_DISABLE) {
2488 ata_dev_info(dev, "unsupported device, disabling\n");
2489 ata_dev_disable(dev);
2493 if ((!atapi_enabled || (ap->flags & ATA_FLAG_NO_ATAPI)) &&
2494 dev->class == ATA_DEV_ATAPI) {
2495 ata_dev_warn(dev, "WARNING: ATAPI is %s, device ignored\n",
2496 atapi_enabled ? "not supported with this driver"
2498 ata_dev_disable(dev);
2502 rc = ata_do_link_spd_horkage(dev);
2506 /* some WD SATA-1 drives have issues with LPM, turn on NOLPM for them */
2507 if ((dev->horkage & ATA_HORKAGE_WD_BROKEN_LPM) &&
2508 (id[ATA_ID_SATA_CAPABILITY] & 0xe) == 0x2)
2509 dev->horkage |= ATA_HORKAGE_NOLPM;
2511 if (ap->flags & ATA_FLAG_NO_LPM)
2512 dev->horkage |= ATA_HORKAGE_NOLPM;
2514 if (dev->horkage & ATA_HORKAGE_NOLPM) {
2515 ata_dev_warn(dev, "LPM support broken, forcing max_power\n");
2516 dev->link->ap->target_lpm_policy = ATA_LPM_MAX_POWER;
2519 /* let ACPI work its magic */
2520 rc = ata_acpi_on_devcfg(dev);
2524 /* massage HPA, do it early as it might change IDENTIFY data */
2525 rc = ata_hpa_resize(dev);
2529 /* print device capabilities */
2530 if (ata_msg_probe(ap))
2532 "%s: cfg 49:%04x 82:%04x 83:%04x 84:%04x "
2533 "85:%04x 86:%04x 87:%04x 88:%04x\n",
2535 id[49], id[82], id[83], id[84],
2536 id[85], id[86], id[87], id[88]);
2538 /* initialize to-be-configured parameters */
2539 dev->flags &= ~ATA_DFLAG_CFG_MASK;
2540 dev->max_sectors = 0;
2546 dev->multi_count = 0;
2549 * common ATA, ATAPI feature tests
2552 /* find max transfer mode; for printk only */
2553 xfer_mask = ata_id_xfermask(id);
2555 if (ata_msg_probe(ap))
2558 /* SCSI only uses 4-char revisions, dump full 8 chars from ATA */
2559 ata_id_c_string(dev->id, fwrevbuf, ATA_ID_FW_REV,
2562 ata_id_c_string(dev->id, modelbuf, ATA_ID_PROD,
2565 /* ATA-specific feature tests */
2566 if (dev->class == ATA_DEV_ATA || dev->class == ATA_DEV_ZAC) {
2567 if (ata_id_is_cfa(id)) {
2568 /* CPRM may make this media unusable */
2569 if (id[ATA_ID_CFA_KEY_MGMT] & 1)
2571 "supports DRM functions and may not be fully accessible\n");
2572 snprintf(revbuf, 7, "CFA");
2574 snprintf(revbuf, 7, "ATA-%d", ata_id_major_version(id));
2575 /* Warn the user if the device has TPM extensions */
2576 if (ata_id_has_tpm(id))
2578 "supports DRM functions and may not be fully accessible\n");
2581 dev->n_sectors = ata_id_n_sectors(id);
2583 /* get current R/W Multiple count setting */
2584 if ((dev->id[47] >> 8) == 0x80 && (dev->id[59] & 0x100)) {
2585 unsigned int max = dev->id[47] & 0xff;
2586 unsigned int cnt = dev->id[59] & 0xff;
2587 /* only recognize/allow powers of two here */
2588 if (is_power_of_2(max) && is_power_of_2(cnt))
2590 dev->multi_count = cnt;
2593 /* print device info to dmesg */
2594 if (ata_msg_drv(ap) && print_info)
2595 ata_dev_info(dev, "%s: %s, %s, max %s\n",
2596 revbuf, modelbuf, fwrevbuf,
2597 ata_mode_string(xfer_mask));
2599 if (ata_id_has_lba(id)) {
2600 rc = ata_dev_config_lba(dev);
2604 ata_dev_config_chs(dev);
2607 ata_dev_config_devslp(dev);
2608 ata_dev_config_sense_reporting(dev);
2609 ata_dev_config_zac(dev);
2610 ata_dev_config_trusted(dev);
2613 if (ata_msg_drv(ap) && print_info)
2614 ata_dev_print_features(dev);
2617 /* ATAPI-specific feature tests */
2618 else if (dev->class == ATA_DEV_ATAPI) {
2619 const char *cdb_intr_string = "";
2620 const char *atapi_an_string = "";
2621 const char *dma_dir_string = "";
2624 rc = atapi_cdb_len(id);
2625 if ((rc < 12) || (rc > ATAPI_CDB_LEN)) {
2626 if (ata_msg_warn(ap))
2627 ata_dev_warn(dev, "unsupported CDB len\n");
2631 dev->cdb_len = (unsigned int) rc;
2633 /* Enable ATAPI AN if both the host and device have
2634 * the support. If PMP is attached, SNTF is required
2635 * to enable ATAPI AN to discern between PHY status
2636 * changed notifications and ATAPI ANs.
2639 (ap->flags & ATA_FLAG_AN) && ata_id_has_atapi_AN(id) &&
2640 (!sata_pmp_attached(ap) ||
2641 sata_scr_read(&ap->link, SCR_NOTIFICATION, &sntf) == 0)) {
2642 /* issue SET feature command to turn this on */
2643 err_mask = ata_dev_set_feature(dev,
2644 SETFEATURES_SATA_ENABLE, SATA_AN);
2647 "failed to enable ATAPI AN (err_mask=0x%x)\n",
2650 dev->flags |= ATA_DFLAG_AN;
2651 atapi_an_string = ", ATAPI AN";
2655 if (ata_id_cdb_intr(dev->id)) {
2656 dev->flags |= ATA_DFLAG_CDB_INTR;
2657 cdb_intr_string = ", CDB intr";
2660 if (atapi_dmadir || (dev->horkage & ATA_HORKAGE_ATAPI_DMADIR) || atapi_id_dmadir(dev->id)) {
2661 dev->flags |= ATA_DFLAG_DMADIR;
2662 dma_dir_string = ", DMADIR";
2665 if (ata_id_has_da(dev->id)) {
2666 dev->flags |= ATA_DFLAG_DA;
2670 /* print device info to dmesg */
2671 if (ata_msg_drv(ap) && print_info)
2673 "ATAPI: %s, %s, max %s%s%s%s\n",
2675 ata_mode_string(xfer_mask),
2676 cdb_intr_string, atapi_an_string,
2680 /* determine max_sectors */
2681 dev->max_sectors = ATA_MAX_SECTORS;
2682 if (dev->flags & ATA_DFLAG_LBA48)
2683 dev->max_sectors = ATA_MAX_SECTORS_LBA48;
2685 /* Limit PATA drive on SATA cable bridge transfers to udma5,
2687 if (ata_dev_knobble(dev)) {
2688 if (ata_msg_drv(ap) && print_info)
2689 ata_dev_info(dev, "applying bridge limits\n");
2690 dev->udma_mask &= ATA_UDMA5;
2691 dev->max_sectors = ATA_MAX_SECTORS;
2694 if ((dev->class == ATA_DEV_ATAPI) &&
2695 (atapi_command_packet_set(id) == TYPE_TAPE)) {
2696 dev->max_sectors = ATA_MAX_SECTORS_TAPE;
2697 dev->horkage |= ATA_HORKAGE_STUCK_ERR;
2700 if (dev->horkage & ATA_HORKAGE_MAX_SEC_128)
2701 dev->max_sectors = min_t(unsigned int, ATA_MAX_SECTORS_128,
2704 if (dev->horkage & ATA_HORKAGE_MAX_SEC_1024)
2705 dev->max_sectors = min_t(unsigned int, ATA_MAX_SECTORS_1024,
2708 if (dev->horkage & ATA_HORKAGE_MAX_SEC_LBA48)
2709 dev->max_sectors = ATA_MAX_SECTORS_LBA48;
2711 if (ap->ops->dev_config)
2712 ap->ops->dev_config(dev);
2714 if (dev->horkage & ATA_HORKAGE_DIAGNOSTIC) {
2715 /* Let the user know. We don't want to disallow opens for
2716 rescue purposes, or in case the vendor is just a blithering
2717 idiot. Do this after the dev_config call as some controllers
2718 with buggy firmware may want to avoid reporting false device
2723 "Drive reports diagnostics failure. This may indicate a drive\n");
2725 "fault or invalid emulation. Contact drive vendor for information.\n");
2729 if ((dev->horkage & ATA_HORKAGE_FIRMWARE_WARN) && print_info) {
2730 ata_dev_warn(dev, "WARNING: device requires firmware update to be fully functional\n");
2731 ata_dev_warn(dev, " contact the vendor or visit http://ata.wiki.kernel.org\n");
2737 if (ata_msg_probe(ap))
2738 ata_dev_dbg(dev, "%s: EXIT, err\n", __func__);
2743 * ata_cable_40wire - return 40 wire cable type
2746 * Helper method for drivers which want to hardwire 40 wire cable
2750 int ata_cable_40wire(struct ata_port *ap)
2752 return ATA_CBL_PATA40;
2754 EXPORT_SYMBOL_GPL(ata_cable_40wire);
2757 * ata_cable_80wire - return 80 wire cable type
2760 * Helper method for drivers which want to hardwire 80 wire cable
2764 int ata_cable_80wire(struct ata_port *ap)
2766 return ATA_CBL_PATA80;
2768 EXPORT_SYMBOL_GPL(ata_cable_80wire);
2771 * ata_cable_unknown - return unknown PATA cable.
2774 * Helper method for drivers which have no PATA cable detection.
2777 int ata_cable_unknown(struct ata_port *ap)
2779 return ATA_CBL_PATA_UNK;
2781 EXPORT_SYMBOL_GPL(ata_cable_unknown);
2784 * ata_cable_ignore - return ignored PATA cable.
2787 * Helper method for drivers which don't use cable type to limit
2790 int ata_cable_ignore(struct ata_port *ap)
2792 return ATA_CBL_PATA_IGN;
2794 EXPORT_SYMBOL_GPL(ata_cable_ignore);
2797 * ata_cable_sata - return SATA cable type
2800 * Helper method for drivers which have SATA cables
2803 int ata_cable_sata(struct ata_port *ap)
2805 return ATA_CBL_SATA;
2807 EXPORT_SYMBOL_GPL(ata_cable_sata);
2810 * ata_bus_probe - Reset and probe ATA bus
2813 * Master ATA bus probing function. Initiates a hardware-dependent
2814 * bus reset, then attempts to identify any devices found on
2818 * PCI/etc. bus probe sem.
2821 * Zero on success, negative errno otherwise.
2824 int ata_bus_probe(struct ata_port *ap)
2826 unsigned int classes[ATA_MAX_DEVICES];
2827 int tries[ATA_MAX_DEVICES];
2829 struct ata_device *dev;
2831 ata_for_each_dev(dev, &ap->link, ALL)
2832 tries[dev->devno] = ATA_PROBE_MAX_TRIES;
2835 ata_for_each_dev(dev, &ap->link, ALL) {
2836 /* If we issue an SRST then an ATA drive (not ATAPI)
2837 * may change configuration and be in PIO0 timing. If
2838 * we do a hard reset (or are coming from power on)
2839 * this is true for ATA or ATAPI. Until we've set a
2840 * suitable controller mode we should not touch the
2841 * bus as we may be talking too fast.
2843 dev->pio_mode = XFER_PIO_0;
2844 dev->dma_mode = 0xff;
2846 /* If the controller has a pio mode setup function
2847 * then use it to set the chipset to rights. Don't
2848 * touch the DMA setup as that will be dealt with when
2849 * configuring devices.
2851 if (ap->ops->set_piomode)
2852 ap->ops->set_piomode(ap, dev);
2855 /* reset and determine device classes */
2856 ap->ops->phy_reset(ap);
2858 ata_for_each_dev(dev, &ap->link, ALL) {
2859 if (dev->class != ATA_DEV_UNKNOWN)
2860 classes[dev->devno] = dev->class;
2862 classes[dev->devno] = ATA_DEV_NONE;
2864 dev->class = ATA_DEV_UNKNOWN;
2867 /* read IDENTIFY page and configure devices. We have to do the identify
2868 specific sequence bass-ackwards so that PDIAG- is released by
2871 ata_for_each_dev(dev, &ap->link, ALL_REVERSE) {
2872 if (tries[dev->devno])
2873 dev->class = classes[dev->devno];
2875 if (!ata_dev_enabled(dev))
2878 rc = ata_dev_read_id(dev, &dev->class, ATA_READID_POSTRESET,
2884 /* Now ask for the cable type as PDIAG- should have been released */
2885 if (ap->ops->cable_detect)
2886 ap->cbl = ap->ops->cable_detect(ap);
2888 /* We may have SATA bridge glue hiding here irrespective of
2889 * the reported cable types and sensed types. When SATA
2890 * drives indicate we have a bridge, we don't know which end
2891 * of the link the bridge is which is a problem.
2893 ata_for_each_dev(dev, &ap->link, ENABLED)
2894 if (ata_id_is_sata(dev->id))
2895 ap->cbl = ATA_CBL_SATA;
2897 /* After the identify sequence we can now set up the devices. We do
2898 this in the normal order so that the user doesn't get confused */
2900 ata_for_each_dev(dev, &ap->link, ENABLED) {
2901 ap->link.eh_context.i.flags |= ATA_EHI_PRINTINFO;
2902 rc = ata_dev_configure(dev);
2903 ap->link.eh_context.i.flags &= ~ATA_EHI_PRINTINFO;
2908 /* configure transfer mode */
2909 rc = ata_set_mode(&ap->link, &dev);
2913 ata_for_each_dev(dev, &ap->link, ENABLED)
2919 tries[dev->devno]--;
2923 /* eeek, something went very wrong, give up */
2924 tries[dev->devno] = 0;
2928 /* give it just one more chance */
2929 tries[dev->devno] = min(tries[dev->devno], 1);
2932 if (tries[dev->devno] == 1) {
2933 /* This is the last chance, better to slow
2934 * down than lose it.
2936 sata_down_spd_limit(&ap->link, 0);
2937 ata_down_xfermask_limit(dev, ATA_DNXFER_PIO);
2941 if (!tries[dev->devno])
2942 ata_dev_disable(dev);
2948 * sata_print_link_status - Print SATA link status
2949 * @link: SATA link to printk link status about
2951 * This function prints link speed and status of a SATA link.
2956 static void sata_print_link_status(struct ata_link *link)
2958 u32 sstatus, scontrol, tmp;
2960 if (sata_scr_read(link, SCR_STATUS, &sstatus))
2962 sata_scr_read(link, SCR_CONTROL, &scontrol);
2964 if (ata_phys_link_online(link)) {
2965 tmp = (sstatus >> 4) & 0xf;
2966 ata_link_info(link, "SATA link up %s (SStatus %X SControl %X)\n",
2967 sata_spd_string(tmp), sstatus, scontrol);
2969 ata_link_info(link, "SATA link down (SStatus %X SControl %X)\n",
2975 * ata_dev_pair - return other device on cable
2978 * Obtain the other device on the same cable, or if none is
2979 * present NULL is returned
2982 struct ata_device *ata_dev_pair(struct ata_device *adev)
2984 struct ata_link *link = adev->link;
2985 struct ata_device *pair = &link->device[1 - adev->devno];
2986 if (!ata_dev_enabled(pair))
2990 EXPORT_SYMBOL_GPL(ata_dev_pair);
2993 * sata_down_spd_limit - adjust SATA spd limit downward
2994 * @link: Link to adjust SATA spd limit for
2995 * @spd_limit: Additional limit
2997 * Adjust SATA spd limit of @link downward. Note that this
2998 * function only adjusts the limit. The change must be applied
2999 * using sata_set_spd().
3001 * If @spd_limit is non-zero, the speed is limited to equal to or
3002 * lower than @spd_limit if such speed is supported. If
3003 * @spd_limit is slower than any supported speed, only the lowest
3004 * supported speed is allowed.
3007 * Inherited from caller.
3010 * 0 on success, negative errno on failure
3012 int sata_down_spd_limit(struct ata_link *link, u32 spd_limit)
3014 u32 sstatus, spd, mask;
3017 if (!sata_scr_valid(link))
3020 /* If SCR can be read, use it to determine the current SPD.
3021 * If not, use cached value in link->sata_spd.
3023 rc = sata_scr_read(link, SCR_STATUS, &sstatus);
3024 if (rc == 0 && ata_sstatus_online(sstatus))
3025 spd = (sstatus >> 4) & 0xf;
3027 spd = link->sata_spd;
3029 mask = link->sata_spd_limit;
3033 /* unconditionally mask off the highest bit */
3034 bit = fls(mask) - 1;
3035 mask &= ~(1 << bit);
3038 * Mask off all speeds higher than or equal to the current one. At
3039 * this point, if current SPD is not available and we previously
3040 * recorded the link speed from SStatus, the driver has already
3041 * masked off the highest bit so mask should already be 1 or 0.
3042 * Otherwise, we should not force 1.5Gbps on a link where we have
3043 * not previously recorded speed from SStatus. Just return in this
3047 mask &= (1 << (spd - 1)) - 1;
3051 /* were we already at the bottom? */
3056 if (mask & ((1 << spd_limit) - 1))
3057 mask &= (1 << spd_limit) - 1;
3059 bit = ffs(mask) - 1;
3064 link->sata_spd_limit = mask;
3066 ata_link_warn(link, "limiting SATA link speed to %s\n",
3067 sata_spd_string(fls(mask)));
3072 #ifdef CONFIG_ATA_ACPI
3074 * ata_timing_cycle2mode - find xfer mode for the specified cycle duration
3075 * @xfer_shift: ATA_SHIFT_* value for transfer type to examine.
3076 * @cycle: cycle duration in ns
3078 * Return matching xfer mode for @cycle. The returned mode is of
3079 * the transfer type specified by @xfer_shift. If @cycle is too
3080 * slow for @xfer_shift, 0xff is returned. If @cycle is faster
3081 * than the fastest known mode, the fasted mode is returned.
3087 * Matching xfer_mode, 0xff if no match found.
3089 u8 ata_timing_cycle2mode(unsigned int xfer_shift, int cycle)
3091 u8 base_mode = 0xff, last_mode = 0xff;
3092 const struct ata_xfer_ent *ent;
3093 const struct ata_timing *t;
3095 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
3096 if (ent->shift == xfer_shift)
3097 base_mode = ent->base;
3099 for (t = ata_timing_find_mode(base_mode);
3100 t && ata_xfer_mode2shift(t->mode) == xfer_shift; t++) {
3101 unsigned short this_cycle;
3103 switch (xfer_shift) {
3105 case ATA_SHIFT_MWDMA:
3106 this_cycle = t->cycle;
3108 case ATA_SHIFT_UDMA:
3109 this_cycle = t->udma;
3115 if (cycle > this_cycle)
3118 last_mode = t->mode;
3126 * ata_down_xfermask_limit - adjust dev xfer masks downward
3127 * @dev: Device to adjust xfer masks
3128 * @sel: ATA_DNXFER_* selector
3130 * Adjust xfer masks of @dev downward. Note that this function
3131 * does not apply the change. Invoking ata_set_mode() afterwards
3132 * will apply the limit.
3135 * Inherited from caller.
3138 * 0 on success, negative errno on failure
3140 int ata_down_xfermask_limit(struct ata_device *dev, unsigned int sel)
3143 unsigned long orig_mask, xfer_mask;
3144 unsigned long pio_mask, mwdma_mask, udma_mask;
3147 quiet = !!(sel & ATA_DNXFER_QUIET);
3148 sel &= ~ATA_DNXFER_QUIET;
3150 xfer_mask = orig_mask = ata_pack_xfermask(dev->pio_mask,
3153 ata_unpack_xfermask(xfer_mask, &pio_mask, &mwdma_mask, &udma_mask);
3156 case ATA_DNXFER_PIO:
3157 highbit = fls(pio_mask) - 1;
3158 pio_mask &= ~(1 << highbit);
3161 case ATA_DNXFER_DMA:
3163 highbit = fls(udma_mask) - 1;
3164 udma_mask &= ~(1 << highbit);
3167 } else if (mwdma_mask) {
3168 highbit = fls(mwdma_mask) - 1;
3169 mwdma_mask &= ~(1 << highbit);
3175 case ATA_DNXFER_40C:
3176 udma_mask &= ATA_UDMA_MASK_40C;
3179 case ATA_DNXFER_FORCE_PIO0:
3182 case ATA_DNXFER_FORCE_PIO:
3191 xfer_mask &= ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask);
3193 if (!(xfer_mask & ATA_MASK_PIO) || xfer_mask == orig_mask)
3197 if (xfer_mask & (ATA_MASK_MWDMA | ATA_MASK_UDMA))
3198 snprintf(buf, sizeof(buf), "%s:%s",
3199 ata_mode_string(xfer_mask),
3200 ata_mode_string(xfer_mask & ATA_MASK_PIO));
3202 snprintf(buf, sizeof(buf), "%s",
3203 ata_mode_string(xfer_mask));
3205 ata_dev_warn(dev, "limiting speed to %s\n", buf);
3208 ata_unpack_xfermask(xfer_mask, &dev->pio_mask, &dev->mwdma_mask,
3214 static int ata_dev_set_mode(struct ata_device *dev)
3216 struct ata_port *ap = dev->link->ap;
3217 struct ata_eh_context *ehc = &dev->link->eh_context;
3218 const bool nosetxfer = dev->horkage & ATA_HORKAGE_NOSETXFER;
3219 const char *dev_err_whine = "";
3220 int ign_dev_err = 0;
3221 unsigned int err_mask = 0;
3224 dev->flags &= ~ATA_DFLAG_PIO;
3225 if (dev->xfer_shift == ATA_SHIFT_PIO)
3226 dev->flags |= ATA_DFLAG_PIO;
3228 if (nosetxfer && ap->flags & ATA_FLAG_SATA && ata_id_is_sata(dev->id))
3229 dev_err_whine = " (SET_XFERMODE skipped)";
3233 "NOSETXFER but PATA detected - can't "
3234 "skip SETXFER, might malfunction\n");
3235 err_mask = ata_dev_set_xfermode(dev);
3238 if (err_mask & ~AC_ERR_DEV)
3242 ehc->i.flags |= ATA_EHI_POST_SETMODE;
3243 rc = ata_dev_revalidate(dev, ATA_DEV_UNKNOWN, 0);
3244 ehc->i.flags &= ~ATA_EHI_POST_SETMODE;
3248 if (dev->xfer_shift == ATA_SHIFT_PIO) {
3249 /* Old CFA may refuse this command, which is just fine */
3250 if (ata_id_is_cfa(dev->id))
3252 /* Catch several broken garbage emulations plus some pre
3254 if (ata_id_major_version(dev->id) == 0 &&
3255 dev->pio_mode <= XFER_PIO_2)
3257 /* Some very old devices and some bad newer ones fail
3258 any kind of SET_XFERMODE request but support PIO0-2
3259 timings and no IORDY */
3260 if (!ata_id_has_iordy(dev->id) && dev->pio_mode <= XFER_PIO_2)
3263 /* Early MWDMA devices do DMA but don't allow DMA mode setting.
3264 Don't fail an MWDMA0 set IFF the device indicates it is in MWDMA0 */
3265 if (dev->xfer_shift == ATA_SHIFT_MWDMA &&
3266 dev->dma_mode == XFER_MW_DMA_0 &&
3267 (dev->id[63] >> 8) & 1)
3270 /* if the device is actually configured correctly, ignore dev err */
3271 if (dev->xfer_mode == ata_xfer_mask2mode(ata_id_xfermask(dev->id)))
3274 if (err_mask & AC_ERR_DEV) {
3278 dev_err_whine = " (device error ignored)";
3281 DPRINTK("xfer_shift=%u, xfer_mode=0x%x\n",
3282 dev->xfer_shift, (int)dev->xfer_mode);
3284 if (!(ehc->i.flags & ATA_EHI_QUIET) ||
3285 ehc->i.flags & ATA_EHI_DID_HARDRESET)
3286 ata_dev_info(dev, "configured for %s%s\n",
3287 ata_mode_string(ata_xfer_mode2mask(dev->xfer_mode)),
3293 ata_dev_err(dev, "failed to set xfermode (err_mask=0x%x)\n", err_mask);
3298 * ata_do_set_mode - Program timings and issue SET FEATURES - XFER
3299 * @link: link on which timings will be programmed
3300 * @r_failed_dev: out parameter for failed device
3302 * Standard implementation of the function used to tune and set
3303 * ATA device disk transfer mode (PIO3, UDMA6, etc.). If
3304 * ata_dev_set_mode() fails, pointer to the failing device is
3305 * returned in @r_failed_dev.
3308 * PCI/etc. bus probe sem.
3311 * 0 on success, negative errno otherwise
3314 int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev)
3316 struct ata_port *ap = link->ap;
3317 struct ata_device *dev;
3318 int rc = 0, used_dma = 0, found = 0;
3320 /* step 1: calculate xfer_mask */
3321 ata_for_each_dev(dev, link, ENABLED) {
3322 unsigned long pio_mask, dma_mask;
3323 unsigned int mode_mask;
3325 mode_mask = ATA_DMA_MASK_ATA;
3326 if (dev->class == ATA_DEV_ATAPI)
3327 mode_mask = ATA_DMA_MASK_ATAPI;
3328 else if (ata_id_is_cfa(dev->id))
3329 mode_mask = ATA_DMA_MASK_CFA;
3331 ata_dev_xfermask(dev);
3332 ata_force_xfermask(dev);
3334 pio_mask = ata_pack_xfermask(dev->pio_mask, 0, 0);
3336 if (libata_dma_mask & mode_mask)
3337 dma_mask = ata_pack_xfermask(0, dev->mwdma_mask,
3342 dev->pio_mode = ata_xfer_mask2mode(pio_mask);
3343 dev->dma_mode = ata_xfer_mask2mode(dma_mask);
3346 if (ata_dma_enabled(dev))
3352 /* step 2: always set host PIO timings */
3353 ata_for_each_dev(dev, link, ENABLED) {
3354 if (dev->pio_mode == 0xff) {
3355 ata_dev_warn(dev, "no PIO support\n");
3360 dev->xfer_mode = dev->pio_mode;
3361 dev->xfer_shift = ATA_SHIFT_PIO;
3362 if (ap->ops->set_piomode)
3363 ap->ops->set_piomode(ap, dev);
3366 /* step 3: set host DMA timings */
3367 ata_for_each_dev(dev, link, ENABLED) {
3368 if (!ata_dma_enabled(dev))
3371 dev->xfer_mode = dev->dma_mode;
3372 dev->xfer_shift = ata_xfer_mode2shift(dev->dma_mode);
3373 if (ap->ops->set_dmamode)
3374 ap->ops->set_dmamode(ap, dev);
3377 /* step 4: update devices' xfer mode */
3378 ata_for_each_dev(dev, link, ENABLED) {
3379 rc = ata_dev_set_mode(dev);
3384 /* Record simplex status. If we selected DMA then the other
3385 * host channels are not permitted to do so.
3387 if (used_dma && (ap->host->flags & ATA_HOST_SIMPLEX))
3388 ap->host->simplex_claimed = ap;
3392 *r_failed_dev = dev;
3395 EXPORT_SYMBOL_GPL(ata_do_set_mode);
3398 * ata_wait_ready - wait for link to become ready
3399 * @link: link to be waited on
3400 * @deadline: deadline jiffies for the operation
3401 * @check_ready: callback to check link readiness
3403 * Wait for @link to become ready. @check_ready should return
3404 * positive number if @link is ready, 0 if it isn't, -ENODEV if
3405 * link doesn't seem to be occupied, other errno for other error
3408 * Transient -ENODEV conditions are allowed for
3409 * ATA_TMOUT_FF_WAIT.
3415 * 0 if @link is ready before @deadline; otherwise, -errno.
3417 int ata_wait_ready(struct ata_link *link, unsigned long deadline,
3418 int (*check_ready)(struct ata_link *link))
3420 unsigned long start = jiffies;
3421 unsigned long nodev_deadline;
3424 /* choose which 0xff timeout to use, read comment in libata.h */
3425 if (link->ap->host->flags & ATA_HOST_PARALLEL_SCAN)
3426 nodev_deadline = ata_deadline(start, ATA_TMOUT_FF_WAIT_LONG);
3428 nodev_deadline = ata_deadline(start, ATA_TMOUT_FF_WAIT);
3430 /* Slave readiness can't be tested separately from master. On
3431 * M/S emulation configuration, this function should be called
3432 * only on the master and it will handle both master and slave.
3434 WARN_ON(link == link->ap->slave_link);
3436 if (time_after(nodev_deadline, deadline))
3437 nodev_deadline = deadline;
3440 unsigned long now = jiffies;
3443 ready = tmp = check_ready(link);
3448 * -ENODEV could be transient. Ignore -ENODEV if link
3449 * is online. Also, some SATA devices take a long
3450 * time to clear 0xff after reset. Wait for
3451 * ATA_TMOUT_FF_WAIT[_LONG] on -ENODEV if link isn't
3454 * Note that some PATA controllers (pata_ali) explode
3455 * if status register is read more than once when
3456 * there's no device attached.
3458 if (ready == -ENODEV) {
3459 if (ata_link_online(link))
3461 else if ((link->ap->flags & ATA_FLAG_SATA) &&
3462 !ata_link_offline(link) &&
3463 time_before(now, nodev_deadline))
3469 if (time_after(now, deadline))
3472 if (!warned && time_after(now, start + 5 * HZ) &&
3473 (deadline - now > 3 * HZ)) {
3475 "link is slow to respond, please be patient "
3476 "(ready=%d)\n", tmp);
3480 ata_msleep(link->ap, 50);
3485 * ata_wait_after_reset - wait for link to become ready after reset
3486 * @link: link to be waited on
3487 * @deadline: deadline jiffies for the operation
3488 * @check_ready: callback to check link readiness
3490 * Wait for @link to become ready after reset.
3496 * 0 if @link is ready before @deadline; otherwise, -errno.
3498 int ata_wait_after_reset(struct ata_link *link, unsigned long deadline,
3499 int (*check_ready)(struct ata_link *link))
3501 ata_msleep(link->ap, ATA_WAIT_AFTER_RESET);
3503 return ata_wait_ready(link, deadline, check_ready);
3505 EXPORT_SYMBOL_GPL(ata_wait_after_reset);
3508 * ata_std_prereset - prepare for reset
3509 * @link: ATA link to be reset
3510 * @deadline: deadline jiffies for the operation
3512 * @link is about to be reset. Initialize it. Failure from
3513 * prereset makes libata abort whole reset sequence and give up
3514 * that port, so prereset should be best-effort. It does its
3515 * best to prepare for reset sequence but if things go wrong, it
3516 * should just whine, not fail.
3519 * Kernel thread context (may sleep)
3522 * 0 on success, -errno otherwise.
3524 int ata_std_prereset(struct ata_link *link, unsigned long deadline)
3526 struct ata_port *ap = link->ap;
3527 struct ata_eh_context *ehc = &link->eh_context;
3528 const unsigned long *timing = sata_ehc_deb_timing(ehc);
3531 /* if we're about to do hardreset, nothing more to do */
3532 if (ehc->i.action & ATA_EH_HARDRESET)
3535 /* if SATA, resume link */
3536 if (ap->flags & ATA_FLAG_SATA) {
3537 rc = sata_link_resume(link, timing, deadline);
3538 /* whine about phy resume failure but proceed */
3539 if (rc && rc != -EOPNOTSUPP)
3541 "failed to resume link for reset (errno=%d)\n",
3545 /* no point in trying softreset on offline link */
3546 if (ata_phys_link_offline(link))
3547 ehc->i.action &= ~ATA_EH_SOFTRESET;
3551 EXPORT_SYMBOL_GPL(ata_std_prereset);
3554 * sata_std_hardreset - COMRESET w/o waiting or classification
3555 * @link: link to reset
3556 * @class: resulting class of attached device
3557 * @deadline: deadline jiffies for the operation
3559 * Standard SATA COMRESET w/o waiting or classification.
3562 * Kernel thread context (may sleep)
3565 * 0 if link offline, -EAGAIN if link online, -errno on errors.
3567 int sata_std_hardreset(struct ata_link *link, unsigned int *class,
3568 unsigned long deadline)
3570 const unsigned long *timing = sata_ehc_deb_timing(&link->eh_context);
3575 rc = sata_link_hardreset(link, timing, deadline, &online, NULL);
3576 return online ? -EAGAIN : rc;
3578 EXPORT_SYMBOL_GPL(sata_std_hardreset);
3581 * ata_std_postreset - standard postreset callback
3582 * @link: the target ata_link
3583 * @classes: classes of attached devices
3585 * This function is invoked after a successful reset. Note that
3586 * the device might have been reset more than once using
3587 * different reset methods before postreset is invoked.
3590 * Kernel thread context (may sleep)
3592 void ata_std_postreset(struct ata_link *link, unsigned int *classes)
3598 /* reset complete, clear SError */
3599 if (!sata_scr_read(link, SCR_ERROR, &serror))
3600 sata_scr_write(link, SCR_ERROR, serror);
3602 /* print link status */
3603 sata_print_link_status(link);
3607 EXPORT_SYMBOL_GPL(ata_std_postreset);
3610 * ata_dev_same_device - Determine whether new ID matches configured device
3611 * @dev: device to compare against
3612 * @new_class: class of the new device
3613 * @new_id: IDENTIFY page of the new device
3615 * Compare @new_class and @new_id against @dev and determine
3616 * whether @dev is the device indicated by @new_class and
3623 * 1 if @dev matches @new_class and @new_id, 0 otherwise.
3625 static int ata_dev_same_device(struct ata_device *dev, unsigned int new_class,
3628 const u16 *old_id = dev->id;
3629 unsigned char model[2][ATA_ID_PROD_LEN + 1];
3630 unsigned char serial[2][ATA_ID_SERNO_LEN + 1];
3632 if (dev->class != new_class) {
3633 ata_dev_info(dev, "class mismatch %d != %d\n",
3634 dev->class, new_class);
3638 ata_id_c_string(old_id, model[0], ATA_ID_PROD, sizeof(model[0]));
3639 ata_id_c_string(new_id, model[1], ATA_ID_PROD, sizeof(model[1]));
3640 ata_id_c_string(old_id, serial[0], ATA_ID_SERNO, sizeof(serial[0]));
3641 ata_id_c_string(new_id, serial[1], ATA_ID_SERNO, sizeof(serial[1]));
3643 if (strcmp(model[0], model[1])) {
3644 ata_dev_info(dev, "model number mismatch '%s' != '%s'\n",
3645 model[0], model[1]);
3649 if (strcmp(serial[0], serial[1])) {
3650 ata_dev_info(dev, "serial number mismatch '%s' != '%s'\n",
3651 serial[0], serial[1]);
3659 * ata_dev_reread_id - Re-read IDENTIFY data
3660 * @dev: target ATA device
3661 * @readid_flags: read ID flags
3663 * Re-read IDENTIFY page and make sure @dev is still attached to
3667 * Kernel thread context (may sleep)
3670 * 0 on success, negative errno otherwise
3672 int ata_dev_reread_id(struct ata_device *dev, unsigned int readid_flags)
3674 unsigned int class = dev->class;
3675 u16 *id = (void *)dev->link->ap->sector_buf;
3679 rc = ata_dev_read_id(dev, &class, readid_flags, id);
3683 /* is the device still there? */
3684 if (!ata_dev_same_device(dev, class, id))
3687 memcpy(dev->id, id, sizeof(id[0]) * ATA_ID_WORDS);
3692 * ata_dev_revalidate - Revalidate ATA device
3693 * @dev: device to revalidate
3694 * @new_class: new class code
3695 * @readid_flags: read ID flags
3697 * Re-read IDENTIFY page, make sure @dev is still attached to the
3698 * port and reconfigure it according to the new IDENTIFY page.
3701 * Kernel thread context (may sleep)
3704 * 0 on success, negative errno otherwise
3706 int ata_dev_revalidate(struct ata_device *dev, unsigned int new_class,
3707 unsigned int readid_flags)
3709 u64 n_sectors = dev->n_sectors;
3710 u64 n_native_sectors = dev->n_native_sectors;
3713 if (!ata_dev_enabled(dev))
3716 /* fail early if !ATA && !ATAPI to avoid issuing [P]IDENTIFY to PMP */
3717 if (ata_class_enabled(new_class) &&
3718 new_class != ATA_DEV_ATA &&
3719 new_class != ATA_DEV_ATAPI &&
3720 new_class != ATA_DEV_ZAC &&
3721 new_class != ATA_DEV_SEMB) {
3722 ata_dev_info(dev, "class mismatch %u != %u\n",
3723 dev->class, new_class);
3729 rc = ata_dev_reread_id(dev, readid_flags);
3733 /* configure device according to the new ID */
3734 rc = ata_dev_configure(dev);
3738 /* verify n_sectors hasn't changed */
3739 if (dev->class != ATA_DEV_ATA || !n_sectors ||
3740 dev->n_sectors == n_sectors)
3743 /* n_sectors has changed */
3744 ata_dev_warn(dev, "n_sectors mismatch %llu != %llu\n",
3745 (unsigned long long)n_sectors,
3746 (unsigned long long)dev->n_sectors);
3749 * Something could have caused HPA to be unlocked
3750 * involuntarily. If n_native_sectors hasn't changed and the
3751 * new size matches it, keep the device.
3753 if (dev->n_native_sectors == n_native_sectors &&
3754 dev->n_sectors > n_sectors && dev->n_sectors == n_native_sectors) {
3756 "new n_sectors matches native, probably "
3757 "late HPA unlock, n_sectors updated\n");
3758 /* use the larger n_sectors */
3763 * Some BIOSes boot w/o HPA but resume w/ HPA locked. Try
3764 * unlocking HPA in those cases.
3766 * https://bugzilla.kernel.org/show_bug.cgi?id=15396
3768 if (dev->n_native_sectors == n_native_sectors &&
3769 dev->n_sectors < n_sectors && n_sectors == n_native_sectors &&
3770 !(dev->horkage & ATA_HORKAGE_BROKEN_HPA)) {
3772 "old n_sectors matches native, probably "
3773 "late HPA lock, will try to unlock HPA\n");
3774 /* try unlocking HPA */
3775 dev->flags |= ATA_DFLAG_UNLOCK_HPA;
3780 /* restore original n_[native_]sectors and fail */
3781 dev->n_native_sectors = n_native_sectors;
3782 dev->n_sectors = n_sectors;
3784 ata_dev_err(dev, "revalidation failed (errno=%d)\n", rc);
3788 struct ata_blacklist_entry {
3789 const char *model_num;
3790 const char *model_rev;
3791 unsigned long horkage;
3794 static const struct ata_blacklist_entry ata_device_blacklist [] = {
3795 /* Devices with DMA related problems under Linux */
3796 { "WDC AC11000H", NULL, ATA_HORKAGE_NODMA },
3797 { "WDC AC22100H", NULL, ATA_HORKAGE_NODMA },
3798 { "WDC AC32500H", NULL, ATA_HORKAGE_NODMA },
3799 { "WDC AC33100H", NULL, ATA_HORKAGE_NODMA },
3800 { "WDC AC31600H", NULL, ATA_HORKAGE_NODMA },
3801 { "WDC AC32100H", "24.09P07", ATA_HORKAGE_NODMA },
3802 { "WDC AC23200L", "21.10N21", ATA_HORKAGE_NODMA },
3803 { "Compaq CRD-8241B", NULL, ATA_HORKAGE_NODMA },
3804 { "CRD-8400B", NULL, ATA_HORKAGE_NODMA },
3805 { "CRD-848[02]B", NULL, ATA_HORKAGE_NODMA },
3806 { "CRD-84", NULL, ATA_HORKAGE_NODMA },
3807 { "SanDisk SDP3B", NULL, ATA_HORKAGE_NODMA },
3808 { "SanDisk SDP3B-64", NULL, ATA_HORKAGE_NODMA },
3809 { "SANYO CD-ROM CRD", NULL, ATA_HORKAGE_NODMA },
3810 { "HITACHI CDR-8", NULL, ATA_HORKAGE_NODMA },
3811 { "HITACHI CDR-8[34]35",NULL, ATA_HORKAGE_NODMA },
3812 { "Toshiba CD-ROM XM-6202B", NULL, ATA_HORKAGE_NODMA },
3813 { "TOSHIBA CD-ROM XM-1702BC", NULL, ATA_HORKAGE_NODMA },
3814 { "CD-532E-A", NULL, ATA_HORKAGE_NODMA },
3815 { "E-IDE CD-ROM CR-840",NULL, ATA_HORKAGE_NODMA },
3816 { "CD-ROM Drive/F5A", NULL, ATA_HORKAGE_NODMA },
3817 { "WPI CDD-820", NULL, ATA_HORKAGE_NODMA },
3818 { "SAMSUNG CD-ROM SC-148C", NULL, ATA_HORKAGE_NODMA },
3819 { "SAMSUNG CD-ROM SC", NULL, ATA_HORKAGE_NODMA },
3820 { "ATAPI CD-ROM DRIVE 40X MAXIMUM",NULL,ATA_HORKAGE_NODMA },
3821 { "_NEC DV5800A", NULL, ATA_HORKAGE_NODMA },
3822 { "SAMSUNG CD-ROM SN-124", "N001", ATA_HORKAGE_NODMA },
3823 { "Seagate STT20000A", NULL, ATA_HORKAGE_NODMA },
3824 { " 2GB ATA Flash Disk", "ADMA428M", ATA_HORKAGE_NODMA },
3825 { "VRFDFC22048UCHC-TE*", NULL, ATA_HORKAGE_NODMA },
3826 /* Odd clown on sil3726/4726 PMPs */
3827 { "Config Disk", NULL, ATA_HORKAGE_DISABLE },
3829 /* Weird ATAPI devices */
3830 { "TORiSAN DVD-ROM DRD-N216", NULL, ATA_HORKAGE_MAX_SEC_128 },
3831 { "QUANTUM DAT DAT72-000", NULL, ATA_HORKAGE_ATAPI_MOD16_DMA },
3832 { "Slimtype DVD A DS8A8SH", NULL, ATA_HORKAGE_MAX_SEC_LBA48 },
3833 { "Slimtype DVD A DS8A9SH", NULL, ATA_HORKAGE_MAX_SEC_LBA48 },
3836 * Causes silent data corruption with higher max sects.
3837 * http://lkml.kernel.org/g/x49wpy40ysk.fsf@segfault.boston.devel.redhat.com
3839 { "ST380013AS", "3.20", ATA_HORKAGE_MAX_SEC_1024 },
3842 * These devices time out with higher max sects.
3843 * https://bugzilla.kernel.org/show_bug.cgi?id=121671
3845 { "LITEON CX1-JB*-HP", NULL, ATA_HORKAGE_MAX_SEC_1024 },
3846 { "LITEON EP1-*", NULL, ATA_HORKAGE_MAX_SEC_1024 },
3848 /* Devices we expect to fail diagnostics */
3850 /* Devices where NCQ should be avoided */
3852 { "WDC WD740ADFD-00", NULL, ATA_HORKAGE_NONCQ },
3853 { "WDC WD740ADFD-00NLR1", NULL, ATA_HORKAGE_NONCQ, },
3854 /* http://thread.gmane.org/gmane.linux.ide/14907 */
3855 { "FUJITSU MHT2060BH", NULL, ATA_HORKAGE_NONCQ },
3857 { "Maxtor *", "BANC*", ATA_HORKAGE_NONCQ },
3858 { "Maxtor 7V300F0", "VA111630", ATA_HORKAGE_NONCQ },
3859 { "ST380817AS", "3.42", ATA_HORKAGE_NONCQ },
3860 { "ST3160023AS", "3.42", ATA_HORKAGE_NONCQ },
3861 { "OCZ CORE_SSD", "02.10104", ATA_HORKAGE_NONCQ },
3863 /* Seagate NCQ + FLUSH CACHE firmware bug */
3864 { "ST31500341AS", "SD1[5-9]", ATA_HORKAGE_NONCQ |
3865 ATA_HORKAGE_FIRMWARE_WARN },
3867 { "ST31000333AS", "SD1[5-9]", ATA_HORKAGE_NONCQ |
3868 ATA_HORKAGE_FIRMWARE_WARN },
3870 { "ST3640[36]23AS", "SD1[5-9]", ATA_HORKAGE_NONCQ |
3871 ATA_HORKAGE_FIRMWARE_WARN },
3873 { "ST3320[68]13AS", "SD1[5-9]", ATA_HORKAGE_NONCQ |
3874 ATA_HORKAGE_FIRMWARE_WARN },
3876 /* drives which fail FPDMA_AA activation (some may freeze afterwards)
3877 the ST disks also have LPM issues */
3878 { "ST1000LM024 HN-M101MBB", NULL, ATA_HORKAGE_BROKEN_FPDMA_AA |
3879 ATA_HORKAGE_NOLPM, },
3880 { "VB0250EAVER", "HPG7", ATA_HORKAGE_BROKEN_FPDMA_AA },
3882 /* Blacklist entries taken from Silicon Image 3124/3132
3883 Windows driver .inf file - also several Linux problem reports */
3884 { "HTS541060G9SA00", "MB3OC60D", ATA_HORKAGE_NONCQ, },
3885 { "HTS541080G9SA00", "MB4OC60D", ATA_HORKAGE_NONCQ, },
3886 { "HTS541010G9SA00", "MBZOC60D", ATA_HORKAGE_NONCQ, },
3888 /* https://bugzilla.kernel.org/show_bug.cgi?id=15573 */
3889 { "C300-CTFDDAC128MAG", "0001", ATA_HORKAGE_NONCQ, },
3891 /* Sandisk SD7/8/9s lock up hard on large trims */
3892 { "SanDisk SD[789]*", NULL, ATA_HORKAGE_MAX_TRIM_128M, },
3894 /* devices which puke on READ_NATIVE_MAX */
3895 { "HDS724040KLSA80", "KFAOA20N", ATA_HORKAGE_BROKEN_HPA, },
3896 { "WDC WD3200JD-00KLB0", "WD-WCAMR1130137", ATA_HORKAGE_BROKEN_HPA },
3897 { "WDC WD2500JD-00HBB0", "WD-WMAL71490727", ATA_HORKAGE_BROKEN_HPA },
3898 { "MAXTOR 6L080L4", "A93.0500", ATA_HORKAGE_BROKEN_HPA },
3900 /* this one allows HPA unlocking but fails IOs on the area */
3901 { "OCZ-VERTEX", "1.30", ATA_HORKAGE_BROKEN_HPA },
3903 /* Devices which report 1 sector over size HPA */
3904 { "ST340823A", NULL, ATA_HORKAGE_HPA_SIZE, },
3905 { "ST320413A", NULL, ATA_HORKAGE_HPA_SIZE, },
3906 { "ST310211A", NULL, ATA_HORKAGE_HPA_SIZE, },
3908 /* Devices which get the IVB wrong */
3909 { "QUANTUM FIREBALLlct10 05", "A03.0900", ATA_HORKAGE_IVB, },
3910 /* Maybe we should just blacklist TSSTcorp... */
3911 { "TSSTcorp CDDVDW SH-S202[HJN]", "SB0[01]", ATA_HORKAGE_IVB, },
3913 /* Devices that do not need bridging limits applied */
3914 { "MTRON MSP-SATA*", NULL, ATA_HORKAGE_BRIDGE_OK, },
3915 { "BUFFALO HD-QSU2/R5", NULL, ATA_HORKAGE_BRIDGE_OK, },
3917 /* Devices which aren't very happy with higher link speeds */
3918 { "WD My Book", NULL, ATA_HORKAGE_1_5_GBPS, },
3919 { "Seagate FreeAgent GoFlex", NULL, ATA_HORKAGE_1_5_GBPS, },
3922 * Devices which choke on SETXFER. Applies only if both the
3923 * device and controller are SATA.
3925 { "PIONEER DVD-RW DVRTD08", NULL, ATA_HORKAGE_NOSETXFER },
3926 { "PIONEER DVD-RW DVRTD08A", NULL, ATA_HORKAGE_NOSETXFER },
3927 { "PIONEER DVD-RW DVR-215", NULL, ATA_HORKAGE_NOSETXFER },
3928 { "PIONEER DVD-RW DVR-212D", NULL, ATA_HORKAGE_NOSETXFER },
3929 { "PIONEER DVD-RW DVR-216D", NULL, ATA_HORKAGE_NOSETXFER },
3931 /* Crucial BX100 SSD 500GB has broken LPM support */
3932 { "CT500BX100SSD1", NULL, ATA_HORKAGE_NOLPM },
3934 /* 512GB MX100 with MU01 firmware has both queued TRIM and LPM issues */
3935 { "Crucial_CT512MX100*", "MU01", ATA_HORKAGE_NO_NCQ_TRIM |
3936 ATA_HORKAGE_ZERO_AFTER_TRIM |
3937 ATA_HORKAGE_NOLPM, },
3938 /* 512GB MX100 with newer firmware has only LPM issues */
3939 { "Crucial_CT512MX100*", NULL, ATA_HORKAGE_ZERO_AFTER_TRIM |
3940 ATA_HORKAGE_NOLPM, },
3942 /* 480GB+ M500 SSDs have both queued TRIM and LPM issues */
3943 { "Crucial_CT480M500*", NULL, ATA_HORKAGE_NO_NCQ_TRIM |
3944 ATA_HORKAGE_ZERO_AFTER_TRIM |
3945 ATA_HORKAGE_NOLPM, },
3946 { "Crucial_CT960M500*", NULL, ATA_HORKAGE_NO_NCQ_TRIM |
3947 ATA_HORKAGE_ZERO_AFTER_TRIM |
3948 ATA_HORKAGE_NOLPM, },
3950 /* These specific Samsung models/firmware-revs do not handle LPM well */
3951 { "SAMSUNG MZMPC128HBFU-000MV", "CXM14M1Q", ATA_HORKAGE_NOLPM, },
3952 { "SAMSUNG SSD PM830 mSATA *", "CXM13D1Q", ATA_HORKAGE_NOLPM, },
3953 { "SAMSUNG MZ7TD256HAFV-000L9", NULL, ATA_HORKAGE_NOLPM, },
3954 { "SAMSUNG MZ7TE512HMHP-000L1", "EXT06L0Q", ATA_HORKAGE_NOLPM, },
3956 /* devices that don't properly handle queued TRIM commands */
3957 { "Micron_M500IT_*", "MU01", ATA_HORKAGE_NO_NCQ_TRIM |
3958 ATA_HORKAGE_ZERO_AFTER_TRIM, },
3959 { "Micron_M500_*", NULL, ATA_HORKAGE_NO_NCQ_TRIM |
3960 ATA_HORKAGE_ZERO_AFTER_TRIM, },
3961 { "Crucial_CT*M500*", NULL, ATA_HORKAGE_NO_NCQ_TRIM |
3962 ATA_HORKAGE_ZERO_AFTER_TRIM, },
3963 { "Micron_M5[15]0_*", "MU01", ATA_HORKAGE_NO_NCQ_TRIM |
3964 ATA_HORKAGE_ZERO_AFTER_TRIM, },
3965 { "Crucial_CT*M550*", "MU01", ATA_HORKAGE_NO_NCQ_TRIM |
3966 ATA_HORKAGE_ZERO_AFTER_TRIM, },
3967 { "Crucial_CT*MX100*", "MU01", ATA_HORKAGE_NO_NCQ_TRIM |
3968 ATA_HORKAGE_ZERO_AFTER_TRIM, },
3969 { "Samsung SSD 840*", NULL, ATA_HORKAGE_NO_NCQ_TRIM |
3970 ATA_HORKAGE_ZERO_AFTER_TRIM, },
3971 { "Samsung SSD 850*", NULL, ATA_HORKAGE_NO_NCQ_TRIM |
3972 ATA_HORKAGE_ZERO_AFTER_TRIM, },
3973 { "FCCT*M500*", NULL, ATA_HORKAGE_NO_NCQ_TRIM |
3974 ATA_HORKAGE_ZERO_AFTER_TRIM, },
3976 /* devices that don't properly handle TRIM commands */
3977 { "SuperSSpeed S238*", NULL, ATA_HORKAGE_NOTRIM, },
3980 * As defined, the DRAT (Deterministic Read After Trim) and RZAT
3981 * (Return Zero After Trim) flags in the ATA Command Set are
3982 * unreliable in the sense that they only define what happens if
3983 * the device successfully executed the DSM TRIM command. TRIM
3984 * is only advisory, however, and the device is free to silently
3985 * ignore all or parts of the request.
3987 * Whitelist drives that are known to reliably return zeroes
3992 * The intel 510 drive has buggy DRAT/RZAT. Explicitly exclude
3993 * that model before whitelisting all other intel SSDs.
3995 { "INTEL*SSDSC2MH*", NULL, 0, },
3997 { "Micron*", NULL, ATA_HORKAGE_ZERO_AFTER_TRIM, },
3998 { "Crucial*", NULL, ATA_HORKAGE_ZERO_AFTER_TRIM, },
3999 { "INTEL*SSD*", NULL, ATA_HORKAGE_ZERO_AFTER_TRIM, },
4000 { "SSD*INTEL*", NULL, ATA_HORKAGE_ZERO_AFTER_TRIM, },
4001 { "Samsung*SSD*", NULL, ATA_HORKAGE_ZERO_AFTER_TRIM, },
4002 { "SAMSUNG*SSD*", NULL, ATA_HORKAGE_ZERO_AFTER_TRIM, },
4003 { "SAMSUNG*MZ7KM*", NULL, ATA_HORKAGE_ZERO_AFTER_TRIM, },
4004 { "ST[1248][0248]0[FH]*", NULL, ATA_HORKAGE_ZERO_AFTER_TRIM, },
4007 * Some WD SATA-I drives spin up and down erratically when the link
4008 * is put into the slumber mode. We don't have full list of the
4009 * affected devices. Disable LPM if the device matches one of the
4010 * known prefixes and is SATA-1. As a side effect LPM partial is
4013 * https://bugzilla.kernel.org/show_bug.cgi?id=57211
4015 { "WDC WD800JD-*", NULL, ATA_HORKAGE_WD_BROKEN_LPM },
4016 { "WDC WD1200JD-*", NULL, ATA_HORKAGE_WD_BROKEN_LPM },
4017 { "WDC WD1600JD-*", NULL, ATA_HORKAGE_WD_BROKEN_LPM },
4018 { "WDC WD2000JD-*", NULL, ATA_HORKAGE_WD_BROKEN_LPM },
4019 { "WDC WD2500JD-*", NULL, ATA_HORKAGE_WD_BROKEN_LPM },
4020 { "WDC WD3000JD-*", NULL, ATA_HORKAGE_WD_BROKEN_LPM },
4021 { "WDC WD3200JD-*", NULL, ATA_HORKAGE_WD_BROKEN_LPM },
4027 static unsigned long ata_dev_blacklisted(const struct ata_device *dev)
4029 unsigned char model_num[ATA_ID_PROD_LEN + 1];
4030 unsigned char model_rev[ATA_ID_FW_REV_LEN + 1];
4031 const struct ata_blacklist_entry *ad = ata_device_blacklist;
4033 ata_id_c_string(dev->id, model_num, ATA_ID_PROD, sizeof(model_num));
4034 ata_id_c_string(dev->id, model_rev, ATA_ID_FW_REV, sizeof(model_rev));
4036 while (ad->model_num) {
4037 if (glob_match(ad->model_num, model_num)) {
4038 if (ad->model_rev == NULL)
4040 if (glob_match(ad->model_rev, model_rev))
4048 static int ata_dma_blacklisted(const struct ata_device *dev)
4050 /* We don't support polling DMA.
4051 * DMA blacklist those ATAPI devices with CDB-intr (and use PIO)
4052 * if the LLDD handles only interrupts in the HSM_ST_LAST state.
4054 if ((dev->link->ap->flags & ATA_FLAG_PIO_POLLING) &&
4055 (dev->flags & ATA_DFLAG_CDB_INTR))
4057 return (dev->horkage & ATA_HORKAGE_NODMA) ? 1 : 0;
4061 * ata_is_40wire - check drive side detection
4064 * Perform drive side detection decoding, allowing for device vendors
4065 * who can't follow the documentation.
4068 static int ata_is_40wire(struct ata_device *dev)
4070 if (dev->horkage & ATA_HORKAGE_IVB)
4071 return ata_drive_40wire_relaxed(dev->id);
4072 return ata_drive_40wire(dev->id);
4076 * cable_is_40wire - 40/80/SATA decider
4077 * @ap: port to consider
4079 * This function encapsulates the policy for speed management
4080 * in one place. At the moment we don't cache the result but
4081 * there is a good case for setting ap->cbl to the result when
4082 * we are called with unknown cables (and figuring out if it
4083 * impacts hotplug at all).
4085 * Return 1 if the cable appears to be 40 wire.
4088 static int cable_is_40wire(struct ata_port *ap)
4090 struct ata_link *link;
4091 struct ata_device *dev;
4093 /* If the controller thinks we are 40 wire, we are. */
4094 if (ap->cbl == ATA_CBL_PATA40)
4097 /* If the controller thinks we are 80 wire, we are. */
4098 if (ap->cbl == ATA_CBL_PATA80 || ap->cbl == ATA_CBL_SATA)
4101 /* If the system is known to be 40 wire short cable (eg
4102 * laptop), then we allow 80 wire modes even if the drive
4105 if (ap->cbl == ATA_CBL_PATA40_SHORT)
4108 /* If the controller doesn't know, we scan.
4110 * Note: We look for all 40 wire detects at this point. Any
4111 * 80 wire detect is taken to be 80 wire cable because
4112 * - in many setups only the one drive (slave if present) will
4113 * give a valid detect
4114 * - if you have a non detect capable drive you don't want it
4115 * to colour the choice
4117 ata_for_each_link(link, ap, EDGE) {
4118 ata_for_each_dev(dev, link, ENABLED) {
4119 if (!ata_is_40wire(dev))
4127 * ata_dev_xfermask - Compute supported xfermask of the given device
4128 * @dev: Device to compute xfermask for
4130 * Compute supported xfermask of @dev and store it in
4131 * dev->*_mask. This function is responsible for applying all
4132 * known limits including host controller limits, device
4138 static void ata_dev_xfermask(struct ata_device *dev)
4140 struct ata_link *link = dev->link;
4141 struct ata_port *ap = link->ap;
4142 struct ata_host *host = ap->host;
4143 unsigned long xfer_mask;
4145 /* controller modes available */
4146 xfer_mask = ata_pack_xfermask(ap->pio_mask,
4147 ap->mwdma_mask, ap->udma_mask);
4149 /* drive modes available */
4150 xfer_mask &= ata_pack_xfermask(dev->pio_mask,
4151 dev->mwdma_mask, dev->udma_mask);
4152 xfer_mask &= ata_id_xfermask(dev->id);
4155 * CFA Advanced TrueIDE timings are not allowed on a shared
4158 if (ata_dev_pair(dev)) {
4159 /* No PIO5 or PIO6 */
4160 xfer_mask &= ~(0x03 << (ATA_SHIFT_PIO + 5));
4161 /* No MWDMA3 or MWDMA 4 */
4162 xfer_mask &= ~(0x03 << (ATA_SHIFT_MWDMA + 3));
4165 if (ata_dma_blacklisted(dev)) {
4166 xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA);
4168 "device is on DMA blacklist, disabling DMA\n");
4171 if ((host->flags & ATA_HOST_SIMPLEX) &&
4172 host->simplex_claimed && host->simplex_claimed != ap) {
4173 xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA);
4175 "simplex DMA is claimed by other device, disabling DMA\n");
4178 if (ap->flags & ATA_FLAG_NO_IORDY)
4179 xfer_mask &= ata_pio_mask_no_iordy(dev);
4181 if (ap->ops->mode_filter)
4182 xfer_mask = ap->ops->mode_filter(dev, xfer_mask);
4184 /* Apply cable rule here. Don't apply it early because when
4185 * we handle hot plug the cable type can itself change.
4186 * Check this last so that we know if the transfer rate was
4187 * solely limited by the cable.
4188 * Unknown or 80 wire cables reported host side are checked
4189 * drive side as well. Cases where we know a 40wire cable
4190 * is used safely for 80 are not checked here.
4192 if (xfer_mask & (0xF8 << ATA_SHIFT_UDMA))
4193 /* UDMA/44 or higher would be available */
4194 if (cable_is_40wire(ap)) {
4196 "limited to UDMA/33 due to 40-wire cable\n");
4197 xfer_mask &= ~(0xF8 << ATA_SHIFT_UDMA);
4200 ata_unpack_xfermask(xfer_mask, &dev->pio_mask,
4201 &dev->mwdma_mask, &dev->udma_mask);
4205 * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command
4206 * @dev: Device to which command will be sent
4208 * Issue SET FEATURES - XFER MODE command to device @dev
4212 * PCI/etc. bus probe sem.
4215 * 0 on success, AC_ERR_* mask otherwise.
4218 static unsigned int ata_dev_set_xfermode(struct ata_device *dev)
4220 struct ata_taskfile tf;
4221 unsigned int err_mask;
4223 /* set up set-features taskfile */
4224 DPRINTK("set features - xfer mode\n");
4226 /* Some controllers and ATAPI devices show flaky interrupt
4227 * behavior after setting xfer mode. Use polling instead.
4229 ata_tf_init(dev, &tf);
4230 tf.command = ATA_CMD_SET_FEATURES;
4231 tf.feature = SETFEATURES_XFER;
4232 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_POLLING;
4233 tf.protocol = ATA_PROT_NODATA;
4234 /* If we are using IORDY we must send the mode setting command */
4235 if (ata_pio_need_iordy(dev))
4236 tf.nsect = dev->xfer_mode;
4237 /* If the device has IORDY and the controller does not - turn it off */
4238 else if (ata_id_has_iordy(dev->id))
4240 else /* In the ancient relic department - skip all of this */
4243 /* On some disks, this command causes spin-up, so we need longer timeout */
4244 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 15000);
4246 DPRINTK("EXIT, err_mask=%x\n", err_mask);
4251 * ata_dev_set_feature - Issue SET FEATURES - SATA FEATURES
4252 * @dev: Device to which command will be sent
4253 * @enable: Whether to enable or disable the feature
4254 * @feature: The sector count represents the feature to set
4256 * Issue SET FEATURES - SATA FEATURES command to device @dev
4257 * on port @ap with sector count
4260 * PCI/etc. bus probe sem.
4263 * 0 on success, AC_ERR_* mask otherwise.
4265 unsigned int ata_dev_set_feature(struct ata_device *dev, u8 enable, u8 feature)
4267 struct ata_taskfile tf;
4268 unsigned int err_mask;
4269 unsigned long timeout = 0;
4271 /* set up set-features taskfile */
4272 DPRINTK("set features - SATA features\n");
4274 ata_tf_init(dev, &tf);
4275 tf.command = ATA_CMD_SET_FEATURES;
4276 tf.feature = enable;
4277 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
4278 tf.protocol = ATA_PROT_NODATA;
4281 if (enable == SETFEATURES_SPINUP)
4282 timeout = ata_probe_timeout ?
4283 ata_probe_timeout * 1000 : SETFEATURES_SPINUP_TIMEOUT;
4284 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, timeout);
4286 DPRINTK("EXIT, err_mask=%x\n", err_mask);
4289 EXPORT_SYMBOL_GPL(ata_dev_set_feature);
4292 * ata_dev_init_params - Issue INIT DEV PARAMS command
4293 * @dev: Device to which command will be sent
4294 * @heads: Number of heads (taskfile parameter)
4295 * @sectors: Number of sectors (taskfile parameter)
4298 * Kernel thread context (may sleep)
4301 * 0 on success, AC_ERR_* mask otherwise.
4303 static unsigned int ata_dev_init_params(struct ata_device *dev,
4304 u16 heads, u16 sectors)
4306 struct ata_taskfile tf;
4307 unsigned int err_mask;
4309 /* Number of sectors per track 1-255. Number of heads 1-16 */
4310 if (sectors < 1 || sectors > 255 || heads < 1 || heads > 16)
4311 return AC_ERR_INVALID;
4313 /* set up init dev params taskfile */
4314 DPRINTK("init dev params \n");
4316 ata_tf_init(dev, &tf);
4317 tf.command = ATA_CMD_INIT_DEV_PARAMS;
4318 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
4319 tf.protocol = ATA_PROT_NODATA;
4321 tf.device |= (heads - 1) & 0x0f; /* max head = num. of heads - 1 */
4323 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
4324 /* A clean abort indicates an original or just out of spec drive
4325 and we should continue as we issue the setup based on the
4326 drive reported working geometry */
4327 if (err_mask == AC_ERR_DEV && (tf.feature & ATA_ABORTED))
4330 DPRINTK("EXIT, err_mask=%x\n", err_mask);
4335 * atapi_check_dma - Check whether ATAPI DMA can be supported
4336 * @qc: Metadata associated with taskfile to check
4338 * Allow low-level driver to filter ATA PACKET commands, returning
4339 * a status indicating whether or not it is OK to use DMA for the
4340 * supplied PACKET command.
4343 * spin_lock_irqsave(host lock)
4345 * RETURNS: 0 when ATAPI DMA can be used
4348 int atapi_check_dma(struct ata_queued_cmd *qc)
4350 struct ata_port *ap = qc->ap;
4352 /* Don't allow DMA if it isn't multiple of 16 bytes. Quite a
4353 * few ATAPI devices choke on such DMA requests.
4355 if (!(qc->dev->horkage & ATA_HORKAGE_ATAPI_MOD16_DMA) &&
4356 unlikely(qc->nbytes & 15))
4359 if (ap->ops->check_atapi_dma)
4360 return ap->ops->check_atapi_dma(qc);
4366 * ata_std_qc_defer - Check whether a qc needs to be deferred
4367 * @qc: ATA command in question
4369 * Non-NCQ commands cannot run with any other command, NCQ or
4370 * not. As upper layer only knows the queue depth, we are
4371 * responsible for maintaining exclusion. This function checks
4372 * whether a new command @qc can be issued.
4375 * spin_lock_irqsave(host lock)
4378 * ATA_DEFER_* if deferring is needed, 0 otherwise.
4380 int ata_std_qc_defer(struct ata_queued_cmd *qc)
4382 struct ata_link *link = qc->dev->link;
4384 if (ata_is_ncq(qc->tf.protocol)) {
4385 if (!ata_tag_valid(link->active_tag))
4388 if (!ata_tag_valid(link->active_tag) && !link->sactive)
4392 return ATA_DEFER_LINK;
4394 EXPORT_SYMBOL_GPL(ata_std_qc_defer);
4396 enum ata_completion_errors ata_noop_qc_prep(struct ata_queued_cmd *qc)
4400 EXPORT_SYMBOL_GPL(ata_noop_qc_prep);
4403 * ata_sg_init - Associate command with scatter-gather table.
4404 * @qc: Command to be associated
4405 * @sg: Scatter-gather table.
4406 * @n_elem: Number of elements in s/g table.
4408 * Initialize the data-related elements of queued_cmd @qc
4409 * to point to a scatter-gather table @sg, containing @n_elem
4413 * spin_lock_irqsave(host lock)
4415 void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
4416 unsigned int n_elem)
4419 qc->n_elem = n_elem;
4423 #ifdef CONFIG_HAS_DMA
4426 * ata_sg_clean - Unmap DMA memory associated with command
4427 * @qc: Command containing DMA memory to be released
4429 * Unmap all mapped DMA memory associated with this command.
4432 * spin_lock_irqsave(host lock)
4434 static void ata_sg_clean(struct ata_queued_cmd *qc)
4436 struct ata_port *ap = qc->ap;
4437 struct scatterlist *sg = qc->sg;
4438 int dir = qc->dma_dir;
4440 WARN_ON_ONCE(sg == NULL);
4442 VPRINTK("unmapping %u sg elements\n", qc->n_elem);
4445 dma_unmap_sg(ap->dev, sg, qc->orig_n_elem, dir);
4447 qc->flags &= ~ATA_QCFLAG_DMAMAP;
4452 * ata_sg_setup - DMA-map the scatter-gather table associated with a command.
4453 * @qc: Command with scatter-gather table to be mapped.
4455 * DMA-map the scatter-gather table associated with queued_cmd @qc.
4458 * spin_lock_irqsave(host lock)
4461 * Zero on success, negative on error.
4464 static int ata_sg_setup(struct ata_queued_cmd *qc)
4466 struct ata_port *ap = qc->ap;
4467 unsigned int n_elem;
4469 VPRINTK("ENTER, ata%u\n", ap->print_id);
4471 n_elem = dma_map_sg(ap->dev, qc->sg, qc->n_elem, qc->dma_dir);
4475 VPRINTK("%d sg elements mapped\n", n_elem);
4476 qc->orig_n_elem = qc->n_elem;
4477 qc->n_elem = n_elem;
4478 qc->flags |= ATA_QCFLAG_DMAMAP;
4483 #else /* !CONFIG_HAS_DMA */
4485 static inline void ata_sg_clean(struct ata_queued_cmd *qc) {}
4486 static inline int ata_sg_setup(struct ata_queued_cmd *qc) { return -1; }
4488 #endif /* !CONFIG_HAS_DMA */
4491 * swap_buf_le16 - swap halves of 16-bit words in place
4492 * @buf: Buffer to swap
4493 * @buf_words: Number of 16-bit words in buffer.
4495 * Swap halves of 16-bit words if needed to convert from
4496 * little-endian byte order to native cpu byte order, or
4500 * Inherited from caller.
4502 void swap_buf_le16(u16 *buf, unsigned int buf_words)
4507 for (i = 0; i < buf_words; i++)
4508 buf[i] = le16_to_cpu(buf[i]);
4509 #endif /* __BIG_ENDIAN */
4513 * ata_qc_new_init - Request an available ATA command, and initialize it
4514 * @dev: Device from whom we request an available command structure
4521 struct ata_queued_cmd *ata_qc_new_init(struct ata_device *dev, int tag)
4523 struct ata_port *ap = dev->link->ap;
4524 struct ata_queued_cmd *qc;
4526 /* no command while frozen */
4527 if (unlikely(ap->pflags & ATA_PFLAG_FROZEN))
4531 if (ap->flags & ATA_FLAG_SAS_HOST) {
4532 tag = ata_sas_allocate_tag(ap);
4537 qc = __ata_qc_from_tag(ap, tag);
4538 qc->tag = qc->hw_tag = tag;
4549 * ata_qc_free - free unused ata_queued_cmd
4550 * @qc: Command to complete
4552 * Designed to free unused ata_queued_cmd object
4553 * in case something prevents using it.
4556 * spin_lock_irqsave(host lock)
4558 void ata_qc_free(struct ata_queued_cmd *qc)
4560 struct ata_port *ap;
4563 WARN_ON_ONCE(qc == NULL); /* ata_qc_from_tag _might_ return NULL */
4568 if (ata_tag_valid(tag)) {
4569 qc->tag = ATA_TAG_POISON;
4570 if (ap->flags & ATA_FLAG_SAS_HOST)
4571 ata_sas_free_tag(tag, ap);
4575 void __ata_qc_complete(struct ata_queued_cmd *qc)
4577 struct ata_port *ap;
4578 struct ata_link *link;
4580 WARN_ON_ONCE(qc == NULL); /* ata_qc_from_tag _might_ return NULL */
4581 WARN_ON_ONCE(!(qc->flags & ATA_QCFLAG_ACTIVE));
4583 link = qc->dev->link;
4585 if (likely(qc->flags & ATA_QCFLAG_DMAMAP))
4588 /* command should be marked inactive atomically with qc completion */
4589 if (ata_is_ncq(qc->tf.protocol)) {
4590 link->sactive &= ~(1 << qc->hw_tag);
4592 ap->nr_active_links--;
4594 link->active_tag = ATA_TAG_POISON;
4595 ap->nr_active_links--;
4598 /* clear exclusive status */
4599 if (unlikely(qc->flags & ATA_QCFLAG_CLEAR_EXCL &&
4600 ap->excl_link == link))
4601 ap->excl_link = NULL;
4603 /* atapi: mark qc as inactive to prevent the interrupt handler
4604 * from completing the command twice later, before the error handler
4605 * is called. (when rc != 0 and atapi request sense is needed)
4607 qc->flags &= ~ATA_QCFLAG_ACTIVE;
4608 ap->qc_active &= ~(1ULL << qc->tag);
4610 /* call completion callback */
4611 qc->complete_fn(qc);
4614 static void fill_result_tf(struct ata_queued_cmd *qc)
4616 struct ata_port *ap = qc->ap;
4618 qc->result_tf.flags = qc->tf.flags;
4619 ap->ops->qc_fill_rtf(qc);
4622 static void ata_verify_xfer(struct ata_queued_cmd *qc)
4624 struct ata_device *dev = qc->dev;
4626 if (!ata_is_data(qc->tf.protocol))
4629 if ((dev->mwdma_mask || dev->udma_mask) && ata_is_pio(qc->tf.protocol))
4632 dev->flags &= ~ATA_DFLAG_DUBIOUS_XFER;
4636 * ata_qc_complete - Complete an active ATA command
4637 * @qc: Command to complete
4639 * Indicate to the mid and upper layers that an ATA command has
4640 * completed, with either an ok or not-ok status.
4642 * Refrain from calling this function multiple times when
4643 * successfully completing multiple NCQ commands.
4644 * ata_qc_complete_multiple() should be used instead, which will
4645 * properly update IRQ expect state.
4648 * spin_lock_irqsave(host lock)
4650 void ata_qc_complete(struct ata_queued_cmd *qc)
4652 struct ata_port *ap = qc->ap;
4654 /* Trigger the LED (if available) */
4655 ledtrig_disk_activity(!!(qc->tf.flags & ATA_TFLAG_WRITE));
4657 /* XXX: New EH and old EH use different mechanisms to
4658 * synchronize EH with regular execution path.
4660 * In new EH, a failed qc is marked with ATA_QCFLAG_FAILED.
4661 * Normal execution path is responsible for not accessing a
4662 * failed qc. libata core enforces the rule by returning NULL
4663 * from ata_qc_from_tag() for failed qcs.
4665 * Old EH depends on ata_qc_complete() nullifying completion
4666 * requests if ATA_QCFLAG_EH_SCHEDULED is set. Old EH does
4667 * not synchronize with interrupt handler. Only PIO task is
4670 if (ap->ops->error_handler) {
4671 struct ata_device *dev = qc->dev;
4672 struct ata_eh_info *ehi = &dev->link->eh_info;
4674 if (unlikely(qc->err_mask))
4675 qc->flags |= ATA_QCFLAG_FAILED;
4678 * Finish internal commands without any further processing
4679 * and always with the result TF filled.
4681 if (unlikely(ata_tag_internal(qc->tag))) {
4683 trace_ata_qc_complete_internal(qc);
4684 __ata_qc_complete(qc);
4689 * Non-internal qc has failed. Fill the result TF and
4692 if (unlikely(qc->flags & ATA_QCFLAG_FAILED)) {
4694 trace_ata_qc_complete_failed(qc);
4695 ata_qc_schedule_eh(qc);
4699 WARN_ON_ONCE(ap->pflags & ATA_PFLAG_FROZEN);
4701 /* read result TF if requested */
4702 if (qc->flags & ATA_QCFLAG_RESULT_TF)
4705 trace_ata_qc_complete_done(qc);
4706 /* Some commands need post-processing after successful
4709 switch (qc->tf.command) {
4710 case ATA_CMD_SET_FEATURES:
4711 if (qc->tf.feature != SETFEATURES_WC_ON &&
4712 qc->tf.feature != SETFEATURES_WC_OFF &&
4713 qc->tf.feature != SETFEATURES_RA_ON &&
4714 qc->tf.feature != SETFEATURES_RA_OFF)
4717 case ATA_CMD_INIT_DEV_PARAMS: /* CHS translation changed */
4718 case ATA_CMD_SET_MULTI: /* multi_count changed */
4719 /* revalidate device */
4720 ehi->dev_action[dev->devno] |= ATA_EH_REVALIDATE;
4721 ata_port_schedule_eh(ap);
4725 dev->flags |= ATA_DFLAG_SLEEPING;
4729 if (unlikely(dev->flags & ATA_DFLAG_DUBIOUS_XFER))
4730 ata_verify_xfer(qc);
4732 __ata_qc_complete(qc);
4734 if (qc->flags & ATA_QCFLAG_EH_SCHEDULED)
4737 /* read result TF if failed or requested */
4738 if (qc->err_mask || qc->flags & ATA_QCFLAG_RESULT_TF)
4741 __ata_qc_complete(qc);
4744 EXPORT_SYMBOL_GPL(ata_qc_complete);
4747 * ata_qc_get_active - get bitmask of active qcs
4748 * @ap: port in question
4751 * spin_lock_irqsave(host lock)
4754 * Bitmask of active qcs
4756 u64 ata_qc_get_active(struct ata_port *ap)
4758 u64 qc_active = ap->qc_active;
4760 /* ATA_TAG_INTERNAL is sent to hw as tag 0 */
4761 if (qc_active & (1ULL << ATA_TAG_INTERNAL)) {
4762 qc_active |= (1 << 0);
4763 qc_active &= ~(1ULL << ATA_TAG_INTERNAL);
4768 EXPORT_SYMBOL_GPL(ata_qc_get_active);
4771 * ata_qc_issue - issue taskfile to device
4772 * @qc: command to issue to device
4774 * Prepare an ATA command to submission to device.
4775 * This includes mapping the data into a DMA-able
4776 * area, filling in the S/G table, and finally
4777 * writing the taskfile to hardware, starting the command.
4780 * spin_lock_irqsave(host lock)
4782 void ata_qc_issue(struct ata_queued_cmd *qc)
4784 struct ata_port *ap = qc->ap;
4785 struct ata_link *link = qc->dev->link;
4786 u8 prot = qc->tf.protocol;
4788 /* Make sure only one non-NCQ command is outstanding. The
4789 * check is skipped for old EH because it reuses active qc to
4790 * request ATAPI sense.
4792 WARN_ON_ONCE(ap->ops->error_handler && ata_tag_valid(link->active_tag));
4794 if (ata_is_ncq(prot)) {
4795 WARN_ON_ONCE(link->sactive & (1 << qc->hw_tag));
4798 ap->nr_active_links++;
4799 link->sactive |= 1 << qc->hw_tag;
4801 WARN_ON_ONCE(link->sactive);
4803 ap->nr_active_links++;
4804 link->active_tag = qc->tag;
4807 qc->flags |= ATA_QCFLAG_ACTIVE;
4808 ap->qc_active |= 1ULL << qc->tag;
4811 * We guarantee to LLDs that they will have at least one
4812 * non-zero sg if the command is a data command.
4814 if (ata_is_data(prot) && (!qc->sg || !qc->n_elem || !qc->nbytes))
4817 if (ata_is_dma(prot) || (ata_is_pio(prot) &&
4818 (ap->flags & ATA_FLAG_PIO_DMA)))
4819 if (ata_sg_setup(qc))
4822 /* if device is sleeping, schedule reset and abort the link */
4823 if (unlikely(qc->dev->flags & ATA_DFLAG_SLEEPING)) {
4824 link->eh_info.action |= ATA_EH_RESET;
4825 ata_ehi_push_desc(&link->eh_info, "waking up from sleep");
4826 ata_link_abort(link);
4830 qc->err_mask |= ap->ops->qc_prep(qc);
4831 if (unlikely(qc->err_mask))
4833 trace_ata_qc_issue(qc);
4834 qc->err_mask |= ap->ops->qc_issue(qc);
4835 if (unlikely(qc->err_mask))
4840 qc->err_mask |= AC_ERR_SYSTEM;
4842 ata_qc_complete(qc);
4846 * ata_phys_link_online - test whether the given link is online
4847 * @link: ATA link to test
4849 * Test whether @link is online. Note that this function returns
4850 * 0 if online status of @link cannot be obtained, so
4851 * ata_link_online(link) != !ata_link_offline(link).
4857 * True if the port online status is available and online.
4859 bool ata_phys_link_online(struct ata_link *link)
4863 if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0 &&
4864 ata_sstatus_online(sstatus))
4870 * ata_phys_link_offline - test whether the given link is offline
4871 * @link: ATA link to test
4873 * Test whether @link is offline. Note that this function
4874 * returns 0 if offline status of @link cannot be obtained, so
4875 * ata_link_online(link) != !ata_link_offline(link).
4881 * True if the port offline status is available and offline.
4883 bool ata_phys_link_offline(struct ata_link *link)
4887 if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0 &&
4888 !ata_sstatus_online(sstatus))
4894 * ata_link_online - test whether the given link is online
4895 * @link: ATA link to test
4897 * Test whether @link is online. This is identical to
4898 * ata_phys_link_online() when there's no slave link. When
4899 * there's a slave link, this function should only be called on
4900 * the master link and will return true if any of M/S links is
4907 * True if the port online status is available and online.
4909 bool ata_link_online(struct ata_link *link)
4911 struct ata_link *slave = link->ap->slave_link;
4913 WARN_ON(link == slave); /* shouldn't be called on slave link */
4915 return ata_phys_link_online(link) ||
4916 (slave && ata_phys_link_online(slave));
4918 EXPORT_SYMBOL_GPL(ata_link_online);
4921 * ata_link_offline - test whether the given link is offline
4922 * @link: ATA link to test
4924 * Test whether @link is offline. This is identical to
4925 * ata_phys_link_offline() when there's no slave link. When
4926 * there's a slave link, this function should only be called on
4927 * the master link and will return true if both M/S links are
4934 * True if the port offline status is available and offline.
4936 bool ata_link_offline(struct ata_link *link)
4938 struct ata_link *slave = link->ap->slave_link;
4940 WARN_ON(link == slave); /* shouldn't be called on slave link */
4942 return ata_phys_link_offline(link) &&
4943 (!slave || ata_phys_link_offline(slave));
4945 EXPORT_SYMBOL_GPL(ata_link_offline);
4948 static void ata_port_request_pm(struct ata_port *ap, pm_message_t mesg,
4949 unsigned int action, unsigned int ehi_flags,
4952 struct ata_link *link;
4953 unsigned long flags;
4955 /* Previous resume operation might still be in
4956 * progress. Wait for PM_PENDING to clear.
4958 if (ap->pflags & ATA_PFLAG_PM_PENDING) {
4959 ata_port_wait_eh(ap);
4960 WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING);
4963 /* request PM ops to EH */
4964 spin_lock_irqsave(ap->lock, flags);
4967 ap->pflags |= ATA_PFLAG_PM_PENDING;
4968 ata_for_each_link(link, ap, HOST_FIRST) {
4969 link->eh_info.action |= action;
4970 link->eh_info.flags |= ehi_flags;
4973 ata_port_schedule_eh(ap);
4975 spin_unlock_irqrestore(ap->lock, flags);
4978 ata_port_wait_eh(ap);
4979 WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING);
4984 * On some hardware, device fails to respond after spun down for suspend. As
4985 * the device won't be used before being resumed, we don't need to touch the
4986 * device. Ask EH to skip the usual stuff and proceed directly to suspend.
4988 * http://thread.gmane.org/gmane.linux.ide/46764
4990 static const unsigned int ata_port_suspend_ehi = ATA_EHI_QUIET
4991 | ATA_EHI_NO_AUTOPSY
4992 | ATA_EHI_NO_RECOVERY;
4994 static void ata_port_suspend(struct ata_port *ap, pm_message_t mesg)
4996 ata_port_request_pm(ap, mesg, 0, ata_port_suspend_ehi, false);
4999 static void ata_port_suspend_async(struct ata_port *ap, pm_message_t mesg)
5001 ata_port_request_pm(ap, mesg, 0, ata_port_suspend_ehi, true);
5004 static int ata_port_pm_suspend(struct device *dev)
5006 struct ata_port *ap = to_ata_port(dev);
5008 if (pm_runtime_suspended(dev))
5011 ata_port_suspend(ap, PMSG_SUSPEND);
5015 static int ata_port_pm_freeze(struct device *dev)
5017 struct ata_port *ap = to_ata_port(dev);
5019 if (pm_runtime_suspended(dev))
5022 ata_port_suspend(ap, PMSG_FREEZE);
5026 static int ata_port_pm_poweroff(struct device *dev)
5028 ata_port_suspend(to_ata_port(dev), PMSG_HIBERNATE);
5032 static const unsigned int ata_port_resume_ehi = ATA_EHI_NO_AUTOPSY
5035 static void ata_port_resume(struct ata_port *ap, pm_message_t mesg)
5037 ata_port_request_pm(ap, mesg, ATA_EH_RESET, ata_port_resume_ehi, false);
5040 static void ata_port_resume_async(struct ata_port *ap, pm_message_t mesg)
5042 ata_port_request_pm(ap, mesg, ATA_EH_RESET, ata_port_resume_ehi, true);
5045 static int ata_port_pm_resume(struct device *dev)
5047 ata_port_resume_async(to_ata_port(dev), PMSG_RESUME);
5048 pm_runtime_disable(dev);
5049 pm_runtime_set_active(dev);
5050 pm_runtime_enable(dev);
5055 * For ODDs, the upper layer will poll for media change every few seconds,
5056 * which will make it enter and leave suspend state every few seconds. And
5057 * as each suspend will cause a hard/soft reset, the gain of runtime suspend
5058 * is very little and the ODD may malfunction after constantly being reset.
5059 * So the idle callback here will not proceed to suspend if a non-ZPODD capable
5060 * ODD is attached to the port.
5062 static int ata_port_runtime_idle(struct device *dev)
5064 struct ata_port *ap = to_ata_port(dev);
5065 struct ata_link *link;
5066 struct ata_device *adev;
5068 ata_for_each_link(link, ap, HOST_FIRST) {
5069 ata_for_each_dev(adev, link, ENABLED)
5070 if (adev->class == ATA_DEV_ATAPI &&
5071 !zpodd_dev_enabled(adev))
5078 static int ata_port_runtime_suspend(struct device *dev)
5080 ata_port_suspend(to_ata_port(dev), PMSG_AUTO_SUSPEND);
5084 static int ata_port_runtime_resume(struct device *dev)
5086 ata_port_resume(to_ata_port(dev), PMSG_AUTO_RESUME);
5090 static const struct dev_pm_ops ata_port_pm_ops = {
5091 .suspend = ata_port_pm_suspend,
5092 .resume = ata_port_pm_resume,
5093 .freeze = ata_port_pm_freeze,
5094 .thaw = ata_port_pm_resume,
5095 .poweroff = ata_port_pm_poweroff,
5096 .restore = ata_port_pm_resume,
5098 .runtime_suspend = ata_port_runtime_suspend,
5099 .runtime_resume = ata_port_runtime_resume,
5100 .runtime_idle = ata_port_runtime_idle,
5103 /* sas ports don't participate in pm runtime management of ata_ports,
5104 * and need to resume ata devices at the domain level, not the per-port
5105 * level. sas suspend/resume is async to allow parallel port recovery
5106 * since sas has multiple ata_port instances per Scsi_Host.
5108 void ata_sas_port_suspend(struct ata_port *ap)
5110 ata_port_suspend_async(ap, PMSG_SUSPEND);
5112 EXPORT_SYMBOL_GPL(ata_sas_port_suspend);
5114 void ata_sas_port_resume(struct ata_port *ap)
5116 ata_port_resume_async(ap, PMSG_RESUME);
5118 EXPORT_SYMBOL_GPL(ata_sas_port_resume);
5121 * ata_host_suspend - suspend host
5122 * @host: host to suspend
5125 * Suspend @host. Actual operation is performed by port suspend.
5127 int ata_host_suspend(struct ata_host *host, pm_message_t mesg)
5129 host->dev->power.power_state = mesg;
5132 EXPORT_SYMBOL_GPL(ata_host_suspend);
5135 * ata_host_resume - resume host
5136 * @host: host to resume
5138 * Resume @host. Actual operation is performed by port resume.
5140 void ata_host_resume(struct ata_host *host)
5142 host->dev->power.power_state = PMSG_ON;
5144 EXPORT_SYMBOL_GPL(ata_host_resume);
5147 const struct device_type ata_port_type = {
5150 .pm = &ata_port_pm_ops,
5155 * ata_dev_init - Initialize an ata_device structure
5156 * @dev: Device structure to initialize
5158 * Initialize @dev in preparation for probing.
5161 * Inherited from caller.
5163 void ata_dev_init(struct ata_device *dev)
5165 struct ata_link *link = ata_dev_phys_link(dev);
5166 struct ata_port *ap = link->ap;
5167 unsigned long flags;
5169 /* SATA spd limit is bound to the attached device, reset together */
5170 link->sata_spd_limit = link->hw_sata_spd_limit;
5173 /* High bits of dev->flags are used to record warm plug
5174 * requests which occur asynchronously. Synchronize using
5177 spin_lock_irqsave(ap->lock, flags);
5178 dev->flags &= ~ATA_DFLAG_INIT_MASK;
5180 spin_unlock_irqrestore(ap->lock, flags);
5182 memset((void *)dev + ATA_DEVICE_CLEAR_BEGIN, 0,
5183 ATA_DEVICE_CLEAR_END - ATA_DEVICE_CLEAR_BEGIN);
5184 dev->pio_mask = UINT_MAX;
5185 dev->mwdma_mask = UINT_MAX;
5186 dev->udma_mask = UINT_MAX;
5190 * ata_link_init - Initialize an ata_link structure
5191 * @ap: ATA port link is attached to
5192 * @link: Link structure to initialize
5193 * @pmp: Port multiplier port number
5198 * Kernel thread context (may sleep)
5200 void ata_link_init(struct ata_port *ap, struct ata_link *link, int pmp)
5204 /* clear everything except for devices */
5205 memset((void *)link + ATA_LINK_CLEAR_BEGIN, 0,
5206 ATA_LINK_CLEAR_END - ATA_LINK_CLEAR_BEGIN);
5210 link->active_tag = ATA_TAG_POISON;
5211 link->hw_sata_spd_limit = UINT_MAX;
5213 /* can't use iterator, ap isn't initialized yet */
5214 for (i = 0; i < ATA_MAX_DEVICES; i++) {
5215 struct ata_device *dev = &link->device[i];
5218 dev->devno = dev - link->device;
5219 #ifdef CONFIG_ATA_ACPI
5220 dev->gtf_filter = ata_acpi_gtf_filter;
5227 * sata_link_init_spd - Initialize link->sata_spd_limit
5228 * @link: Link to configure sata_spd_limit for
5230 * Initialize ``link->[hw_]sata_spd_limit`` to the currently
5234 * Kernel thread context (may sleep).
5237 * 0 on success, -errno on failure.
5239 int sata_link_init_spd(struct ata_link *link)
5244 rc = sata_scr_read(link, SCR_CONTROL, &link->saved_scontrol);
5248 spd = (link->saved_scontrol >> 4) & 0xf;
5250 link->hw_sata_spd_limit &= (1 << spd) - 1;
5252 ata_force_link_limits(link);
5254 link->sata_spd_limit = link->hw_sata_spd_limit;
5260 * ata_port_alloc - allocate and initialize basic ATA port resources
5261 * @host: ATA host this allocated port belongs to
5263 * Allocate and initialize basic ATA port resources.
5266 * Allocate ATA port on success, NULL on failure.
5269 * Inherited from calling layer (may sleep).
5271 struct ata_port *ata_port_alloc(struct ata_host *host)
5273 struct ata_port *ap;
5277 ap = kzalloc(sizeof(*ap), GFP_KERNEL);
5281 ap->pflags |= ATA_PFLAG_INITIALIZING | ATA_PFLAG_FROZEN;
5282 ap->lock = &host->lock;
5284 ap->local_port_no = -1;
5286 ap->dev = host->dev;
5288 #if defined(ATA_VERBOSE_DEBUG)
5289 /* turn on all debugging levels */
5290 ap->msg_enable = 0x00FF;
5291 #elif defined(ATA_DEBUG)
5292 ap->msg_enable = ATA_MSG_DRV | ATA_MSG_INFO | ATA_MSG_CTL | ATA_MSG_WARN | ATA_MSG_ERR;
5294 ap->msg_enable = ATA_MSG_DRV | ATA_MSG_ERR | ATA_MSG_WARN;
5297 mutex_init(&ap->scsi_scan_mutex);
5298 INIT_DELAYED_WORK(&ap->hotplug_task, ata_scsi_hotplug);
5299 INIT_WORK(&ap->scsi_rescan_task, ata_scsi_dev_rescan);
5300 INIT_LIST_HEAD(&ap->eh_done_q);
5301 init_waitqueue_head(&ap->eh_wait_q);
5302 init_completion(&ap->park_req_pending);
5303 timer_setup(&ap->fastdrain_timer, ata_eh_fastdrain_timerfn,
5306 ap->cbl = ATA_CBL_NONE;
5308 ata_link_init(ap, &ap->link, 0);
5311 ap->stats.unhandled_irq = 1;
5312 ap->stats.idle_irq = 1;
5314 ata_sff_port_init(ap);
5319 static void ata_devres_release(struct device *gendev, void *res)
5321 struct ata_host *host = dev_get_drvdata(gendev);
5324 for (i = 0; i < host->n_ports; i++) {
5325 struct ata_port *ap = host->ports[i];
5331 scsi_host_put(ap->scsi_host);
5335 dev_set_drvdata(gendev, NULL);
5339 static void ata_host_release(struct kref *kref)
5341 struct ata_host *host = container_of(kref, struct ata_host, kref);
5344 for (i = 0; i < host->n_ports; i++) {
5345 struct ata_port *ap = host->ports[i];
5347 kfree(ap->pmp_link);
5348 kfree(ap->slave_link);
5350 host->ports[i] = NULL;
5355 void ata_host_get(struct ata_host *host)
5357 kref_get(&host->kref);
5360 void ata_host_put(struct ata_host *host)
5362 kref_put(&host->kref, ata_host_release);
5364 EXPORT_SYMBOL_GPL(ata_host_put);
5367 * ata_host_alloc - allocate and init basic ATA host resources
5368 * @dev: generic device this host is associated with
5369 * @max_ports: maximum number of ATA ports associated with this host
5371 * Allocate and initialize basic ATA host resources. LLD calls
5372 * this function to allocate a host, initializes it fully and
5373 * attaches it using ata_host_register().
5375 * @max_ports ports are allocated and host->n_ports is
5376 * initialized to @max_ports. The caller is allowed to decrease
5377 * host->n_ports before calling ata_host_register(). The unused
5378 * ports will be automatically freed on registration.
5381 * Allocate ATA host on success, NULL on failure.
5384 * Inherited from calling layer (may sleep).
5386 struct ata_host *ata_host_alloc(struct device *dev, int max_ports)
5388 struct ata_host *host;
5395 /* alloc a container for our list of ATA ports (buses) */
5396 sz = sizeof(struct ata_host) + (max_ports + 1) * sizeof(void *);
5397 host = kzalloc(sz, GFP_KERNEL);
5401 if (!devres_open_group(dev, NULL, GFP_KERNEL))
5404 dr = devres_alloc(ata_devres_release, 0, GFP_KERNEL);
5408 devres_add(dev, dr);
5409 dev_set_drvdata(dev, host);
5411 spin_lock_init(&host->lock);
5412 mutex_init(&host->eh_mutex);
5414 host->n_ports = max_ports;
5415 kref_init(&host->kref);
5417 /* allocate ports bound to this host */
5418 for (i = 0; i < max_ports; i++) {
5419 struct ata_port *ap;
5421 ap = ata_port_alloc(host);
5426 host->ports[i] = ap;
5429 devres_remove_group(dev, NULL);
5433 devres_release_group(dev, NULL);
5438 EXPORT_SYMBOL_GPL(ata_host_alloc);
5441 * ata_host_alloc_pinfo - alloc host and init with port_info array
5442 * @dev: generic device this host is associated with
5443 * @ppi: array of ATA port_info to initialize host with
5444 * @n_ports: number of ATA ports attached to this host
5446 * Allocate ATA host and initialize with info from @ppi. If NULL
5447 * terminated, @ppi may contain fewer entries than @n_ports. The
5448 * last entry will be used for the remaining ports.
5451 * Allocate ATA host on success, NULL on failure.
5454 * Inherited from calling layer (may sleep).
5456 struct ata_host *ata_host_alloc_pinfo(struct device *dev,
5457 const struct ata_port_info * const * ppi,
5460 const struct ata_port_info *pi;
5461 struct ata_host *host;
5464 host = ata_host_alloc(dev, n_ports);
5468 for (i = 0, j = 0, pi = NULL; i < host->n_ports; i++) {
5469 struct ata_port *ap = host->ports[i];
5474 ap->pio_mask = pi->pio_mask;
5475 ap->mwdma_mask = pi->mwdma_mask;
5476 ap->udma_mask = pi->udma_mask;
5477 ap->flags |= pi->flags;
5478 ap->link.flags |= pi->link_flags;
5479 ap->ops = pi->port_ops;
5481 if (!host->ops && (pi->port_ops != &ata_dummy_port_ops))
5482 host->ops = pi->port_ops;
5487 EXPORT_SYMBOL_GPL(ata_host_alloc_pinfo);
5489 static void ata_host_stop(struct device *gendev, void *res)
5491 struct ata_host *host = dev_get_drvdata(gendev);
5494 WARN_ON(!(host->flags & ATA_HOST_STARTED));
5496 for (i = 0; i < host->n_ports; i++) {
5497 struct ata_port *ap = host->ports[i];
5499 if (ap->ops->port_stop)
5500 ap->ops->port_stop(ap);
5503 if (host->ops->host_stop)
5504 host->ops->host_stop(host);
5508 * ata_finalize_port_ops - finalize ata_port_operations
5509 * @ops: ata_port_operations to finalize
5511 * An ata_port_operations can inherit from another ops and that
5512 * ops can again inherit from another. This can go on as many
5513 * times as necessary as long as there is no loop in the
5514 * inheritance chain.
5516 * Ops tables are finalized when the host is started. NULL or
5517 * unspecified entries are inherited from the closet ancestor
5518 * which has the method and the entry is populated with it.
5519 * After finalization, the ops table directly points to all the
5520 * methods and ->inherits is no longer necessary and cleared.
5522 * Using ATA_OP_NULL, inheriting ops can force a method to NULL.
5527 static void ata_finalize_port_ops(struct ata_port_operations *ops)
5529 static DEFINE_SPINLOCK(lock);
5530 const struct ata_port_operations *cur;
5531 void **begin = (void **)ops;
5532 void **end = (void **)&ops->inherits;
5535 if (!ops || !ops->inherits)
5540 for (cur = ops->inherits; cur; cur = cur->inherits) {
5541 void **inherit = (void **)cur;
5543 for (pp = begin; pp < end; pp++, inherit++)
5548 for (pp = begin; pp < end; pp++)
5552 ops->inherits = NULL;
5558 * ata_host_start - start and freeze ports of an ATA host
5559 * @host: ATA host to start ports for
5561 * Start and then freeze ports of @host. Started status is
5562 * recorded in host->flags, so this function can be called
5563 * multiple times. Ports are guaranteed to get started only
5564 * once. If host->ops isn't initialized yet, its set to the
5565 * first non-dummy port ops.
5568 * Inherited from calling layer (may sleep).
5571 * 0 if all ports are started successfully, -errno otherwise.
5573 int ata_host_start(struct ata_host *host)
5576 void *start_dr = NULL;
5579 if (host->flags & ATA_HOST_STARTED)
5582 ata_finalize_port_ops(host->ops);
5584 for (i = 0; i < host->n_ports; i++) {
5585 struct ata_port *ap = host->ports[i];
5587 ata_finalize_port_ops(ap->ops);
5589 if (!host->ops && !ata_port_is_dummy(ap))
5590 host->ops = ap->ops;
5592 if (ap->ops->port_stop)
5596 if (host->ops && host->ops->host_stop)
5600 start_dr = devres_alloc(ata_host_stop, 0, GFP_KERNEL);
5605 for (i = 0; i < host->n_ports; i++) {
5606 struct ata_port *ap = host->ports[i];
5608 if (ap->ops->port_start) {
5609 rc = ap->ops->port_start(ap);
5613 "failed to start port %d (errno=%d)\n",
5618 ata_eh_freeze_port(ap);
5622 devres_add(host->dev, start_dr);
5623 host->flags |= ATA_HOST_STARTED;
5628 struct ata_port *ap = host->ports[i];
5630 if (ap->ops->port_stop)
5631 ap->ops->port_stop(ap);
5633 devres_free(start_dr);
5636 EXPORT_SYMBOL_GPL(ata_host_start);
5639 * ata_host_init - Initialize a host struct for sas (ipr, libsas)
5640 * @host: host to initialize
5641 * @dev: device host is attached to
5645 void ata_host_init(struct ata_host *host, struct device *dev,
5646 struct ata_port_operations *ops)
5648 spin_lock_init(&host->lock);
5649 mutex_init(&host->eh_mutex);
5650 host->n_tags = ATA_MAX_QUEUE;
5653 kref_init(&host->kref);
5655 EXPORT_SYMBOL_GPL(ata_host_init);
5657 void __ata_port_probe(struct ata_port *ap)
5659 struct ata_eh_info *ehi = &ap->link.eh_info;
5660 unsigned long flags;
5662 /* kick EH for boot probing */
5663 spin_lock_irqsave(ap->lock, flags);
5665 ehi->probe_mask |= ATA_ALL_DEVICES;
5666 ehi->action |= ATA_EH_RESET;
5667 ehi->flags |= ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET;
5669 ap->pflags &= ~ATA_PFLAG_INITIALIZING;
5670 ap->pflags |= ATA_PFLAG_LOADING;
5671 ata_port_schedule_eh(ap);
5673 spin_unlock_irqrestore(ap->lock, flags);
5676 int ata_port_probe(struct ata_port *ap)
5680 if (ap->ops->error_handler) {
5681 __ata_port_probe(ap);
5682 ata_port_wait_eh(ap);
5684 DPRINTK("ata%u: bus probe begin\n", ap->print_id);
5685 rc = ata_bus_probe(ap);
5686 DPRINTK("ata%u: bus probe end\n", ap->print_id);
5692 static void async_port_probe(void *data, async_cookie_t cookie)
5694 struct ata_port *ap = data;
5697 * If we're not allowed to scan this host in parallel,
5698 * we need to wait until all previous scans have completed
5699 * before going further.
5700 * Jeff Garzik says this is only within a controller, so we
5701 * don't need to wait for port 0, only for later ports.
5703 if (!(ap->host->flags & ATA_HOST_PARALLEL_SCAN) && ap->port_no != 0)
5704 async_synchronize_cookie(cookie);
5706 (void)ata_port_probe(ap);
5708 /* in order to keep device order, we need to synchronize at this point */
5709 async_synchronize_cookie(cookie);
5711 ata_scsi_scan_host(ap, 1);
5715 * ata_host_register - register initialized ATA host
5716 * @host: ATA host to register
5717 * @sht: template for SCSI host
5719 * Register initialized ATA host. @host is allocated using
5720 * ata_host_alloc() and fully initialized by LLD. This function
5721 * starts ports, registers @host with ATA and SCSI layers and
5722 * probe registered devices.
5725 * Inherited from calling layer (may sleep).
5728 * 0 on success, -errno otherwise.
5730 int ata_host_register(struct ata_host *host, struct scsi_host_template *sht)
5734 host->n_tags = clamp(sht->can_queue, 1, ATA_MAX_QUEUE);
5736 /* host must have been started */
5737 if (!(host->flags & ATA_HOST_STARTED)) {
5738 dev_err(host->dev, "BUG: trying to register unstarted host\n");
5743 /* Blow away unused ports. This happens when LLD can't
5744 * determine the exact number of ports to allocate at
5747 for (i = host->n_ports; host->ports[i]; i++)
5748 kfree(host->ports[i]);
5750 /* give ports names and add SCSI hosts */
5751 for (i = 0; i < host->n_ports; i++) {
5752 host->ports[i]->print_id = atomic_inc_return(&ata_print_id);
5753 host->ports[i]->local_port_no = i + 1;
5756 /* Create associated sysfs transport objects */
5757 for (i = 0; i < host->n_ports; i++) {
5758 rc = ata_tport_add(host->dev,host->ports[i]);
5764 rc = ata_scsi_add_hosts(host, sht);
5768 /* set cable, sata_spd_limit and report */
5769 for (i = 0; i < host->n_ports; i++) {
5770 struct ata_port *ap = host->ports[i];
5771 unsigned long xfer_mask;
5773 /* set SATA cable type if still unset */
5774 if (ap->cbl == ATA_CBL_NONE && (ap->flags & ATA_FLAG_SATA))
5775 ap->cbl = ATA_CBL_SATA;
5777 /* init sata_spd_limit to the current value */
5778 sata_link_init_spd(&ap->link);
5780 sata_link_init_spd(ap->slave_link);
5782 /* print per-port info to dmesg */
5783 xfer_mask = ata_pack_xfermask(ap->pio_mask, ap->mwdma_mask,
5786 if (!ata_port_is_dummy(ap)) {
5787 ata_port_info(ap, "%cATA max %s %s\n",
5788 (ap->flags & ATA_FLAG_SATA) ? 'S' : 'P',
5789 ata_mode_string(xfer_mask),
5790 ap->link.eh_info.desc);
5791 ata_ehi_clear_desc(&ap->link.eh_info);
5793 ata_port_info(ap, "DUMMY\n");
5796 /* perform each probe asynchronously */
5797 for (i = 0; i < host->n_ports; i++) {
5798 struct ata_port *ap = host->ports[i];
5799 ap->cookie = async_schedule(async_port_probe, ap);
5806 ata_tport_delete(host->ports[i]);
5811 EXPORT_SYMBOL_GPL(ata_host_register);
5814 * ata_host_activate - start host, request IRQ and register it
5815 * @host: target ATA host
5816 * @irq: IRQ to request
5817 * @irq_handler: irq_handler used when requesting IRQ
5818 * @irq_flags: irq_flags used when requesting IRQ
5819 * @sht: scsi_host_template to use when registering the host
5821 * After allocating an ATA host and initializing it, most libata
5822 * LLDs perform three steps to activate the host - start host,
5823 * request IRQ and register it. This helper takes necessary
5824 * arguments and performs the three steps in one go.
5826 * An invalid IRQ skips the IRQ registration and expects the host to
5827 * have set polling mode on the port. In this case, @irq_handler
5831 * Inherited from calling layer (may sleep).
5834 * 0 on success, -errno otherwise.
5836 int ata_host_activate(struct ata_host *host, int irq,
5837 irq_handler_t irq_handler, unsigned long irq_flags,
5838 struct scsi_host_template *sht)
5843 rc = ata_host_start(host);
5847 /* Special case for polling mode */
5849 WARN_ON(irq_handler);
5850 return ata_host_register(host, sht);
5853 irq_desc = devm_kasprintf(host->dev, GFP_KERNEL, "%s[%s]",
5854 dev_driver_string(host->dev),
5855 dev_name(host->dev));
5859 rc = devm_request_irq(host->dev, irq, irq_handler, irq_flags,
5864 for (i = 0; i < host->n_ports; i++)
5865 ata_port_desc(host->ports[i], "irq %d", irq);
5867 rc = ata_host_register(host, sht);
5868 /* if failed, just free the IRQ and leave ports alone */
5870 devm_free_irq(host->dev, irq, host);
5874 EXPORT_SYMBOL_GPL(ata_host_activate);
5877 * ata_port_detach - Detach ATA port in preparation of device removal
5878 * @ap: ATA port to be detached
5880 * Detach all ATA devices and the associated SCSI devices of @ap;
5881 * then, remove the associated SCSI host. @ap is guaranteed to
5882 * be quiescent on return from this function.
5885 * Kernel thread context (may sleep).
5887 static void ata_port_detach(struct ata_port *ap)
5889 unsigned long flags;
5890 struct ata_link *link;
5891 struct ata_device *dev;
5893 if (!ap->ops->error_handler)
5896 /* tell EH we're leaving & flush EH */
5897 spin_lock_irqsave(ap->lock, flags);
5898 ap->pflags |= ATA_PFLAG_UNLOADING;
5899 ata_port_schedule_eh(ap);
5900 spin_unlock_irqrestore(ap->lock, flags);
5902 /* wait till EH commits suicide */
5903 ata_port_wait_eh(ap);
5905 /* it better be dead now */
5906 WARN_ON(!(ap->pflags & ATA_PFLAG_UNLOADED));
5908 cancel_delayed_work_sync(&ap->hotplug_task);
5911 /* clean up zpodd on port removal */
5912 ata_for_each_link(link, ap, HOST_FIRST) {
5913 ata_for_each_dev(dev, link, ALL) {
5914 if (zpodd_dev_enabled(dev))
5920 for (i = 0; i < SATA_PMP_MAX_PORTS; i++)
5921 ata_tlink_delete(&ap->pmp_link[i]);
5923 /* remove the associated SCSI host */
5924 scsi_remove_host(ap->scsi_host);
5925 ata_tport_delete(ap);
5929 * ata_host_detach - Detach all ports of an ATA host
5930 * @host: Host to detach
5932 * Detach all ports of @host.
5935 * Kernel thread context (may sleep).
5937 void ata_host_detach(struct ata_host *host)
5941 for (i = 0; i < host->n_ports; i++) {
5942 /* Ensure ata_port probe has completed */
5943 async_synchronize_cookie(host->ports[i]->cookie + 1);
5944 ata_port_detach(host->ports[i]);
5947 /* the host is dead now, dissociate ACPI */
5948 ata_acpi_dissociate(host);
5950 EXPORT_SYMBOL_GPL(ata_host_detach);
5955 * ata_pci_remove_one - PCI layer callback for device removal
5956 * @pdev: PCI device that was removed
5958 * PCI layer indicates to libata via this hook that hot-unplug or
5959 * module unload event has occurred. Detach all ports. Resource
5960 * release is handled via devres.
5963 * Inherited from PCI layer (may sleep).
5965 void ata_pci_remove_one(struct pci_dev *pdev)
5967 struct ata_host *host = pci_get_drvdata(pdev);
5969 ata_host_detach(host);
5971 EXPORT_SYMBOL_GPL(ata_pci_remove_one);
5973 void ata_pci_shutdown_one(struct pci_dev *pdev)
5975 struct ata_host *host = pci_get_drvdata(pdev);
5978 for (i = 0; i < host->n_ports; i++) {
5979 struct ata_port *ap = host->ports[i];
5981 ap->pflags |= ATA_PFLAG_FROZEN;
5983 /* Disable port interrupts */
5984 if (ap->ops->freeze)
5985 ap->ops->freeze(ap);
5987 /* Stop the port DMA engines */
5988 if (ap->ops->port_stop)
5989 ap->ops->port_stop(ap);
5992 EXPORT_SYMBOL_GPL(ata_pci_shutdown_one);
5994 /* move to PCI subsystem */
5995 int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits)
5997 unsigned long tmp = 0;
5999 switch (bits->width) {
6002 pci_read_config_byte(pdev, bits->reg, &tmp8);
6008 pci_read_config_word(pdev, bits->reg, &tmp16);
6014 pci_read_config_dword(pdev, bits->reg, &tmp32);
6025 return (tmp == bits->val) ? 1 : 0;
6027 EXPORT_SYMBOL_GPL(pci_test_config_bits);
6030 void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg)
6032 pci_save_state(pdev);
6033 pci_disable_device(pdev);
6035 if (mesg.event & PM_EVENT_SLEEP)
6036 pci_set_power_state(pdev, PCI_D3hot);
6038 EXPORT_SYMBOL_GPL(ata_pci_device_do_suspend);
6040 int ata_pci_device_do_resume(struct pci_dev *pdev)
6044 pci_set_power_state(pdev, PCI_D0);
6045 pci_restore_state(pdev);
6047 rc = pcim_enable_device(pdev);
6050 "failed to enable device after resume (%d)\n", rc);
6054 pci_set_master(pdev);
6057 EXPORT_SYMBOL_GPL(ata_pci_device_do_resume);
6059 int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg)
6061 struct ata_host *host = pci_get_drvdata(pdev);
6064 rc = ata_host_suspend(host, mesg);
6068 ata_pci_device_do_suspend(pdev, mesg);
6072 EXPORT_SYMBOL_GPL(ata_pci_device_suspend);
6074 int ata_pci_device_resume(struct pci_dev *pdev)
6076 struct ata_host *host = pci_get_drvdata(pdev);
6079 rc = ata_pci_device_do_resume(pdev);
6081 ata_host_resume(host);
6084 EXPORT_SYMBOL_GPL(ata_pci_device_resume);
6085 #endif /* CONFIG_PM */
6086 #endif /* CONFIG_PCI */
6089 * ata_platform_remove_one - Platform layer callback for device removal
6090 * @pdev: Platform device that was removed
6092 * Platform layer indicates to libata via this hook that hot-unplug or
6093 * module unload event has occurred. Detach all ports. Resource
6094 * release is handled via devres.
6097 * Inherited from platform layer (may sleep).
6099 int ata_platform_remove_one(struct platform_device *pdev)
6101 struct ata_host *host = platform_get_drvdata(pdev);
6103 ata_host_detach(host);
6107 EXPORT_SYMBOL_GPL(ata_platform_remove_one);
6109 #ifdef CONFIG_ATA_FORCE
6110 static int __init ata_parse_force_one(char **cur,
6111 struct ata_force_ent *force_ent,
6112 const char **reason)
6114 static const struct ata_force_param force_tbl[] __initconst = {
6115 { "40c", .cbl = ATA_CBL_PATA40 },
6116 { "80c", .cbl = ATA_CBL_PATA80 },
6117 { "short40c", .cbl = ATA_CBL_PATA40_SHORT },
6118 { "unk", .cbl = ATA_CBL_PATA_UNK },
6119 { "ign", .cbl = ATA_CBL_PATA_IGN },
6120 { "sata", .cbl = ATA_CBL_SATA },
6121 { "1.5Gbps", .spd_limit = 1 },
6122 { "3.0Gbps", .spd_limit = 2 },
6123 { "noncq", .horkage_on = ATA_HORKAGE_NONCQ },
6124 { "ncq", .horkage_off = ATA_HORKAGE_NONCQ },
6125 { "noncqtrim", .horkage_on = ATA_HORKAGE_NO_NCQ_TRIM },
6126 { "ncqtrim", .horkage_off = ATA_HORKAGE_NO_NCQ_TRIM },
6127 { "dump_id", .horkage_on = ATA_HORKAGE_DUMP_ID },
6128 { "pio0", .xfer_mask = 1 << (ATA_SHIFT_PIO + 0) },
6129 { "pio1", .xfer_mask = 1 << (ATA_SHIFT_PIO + 1) },
6130 { "pio2", .xfer_mask = 1 << (ATA_SHIFT_PIO + 2) },
6131 { "pio3", .xfer_mask = 1 << (ATA_SHIFT_PIO + 3) },
6132 { "pio4", .xfer_mask = 1 << (ATA_SHIFT_PIO + 4) },
6133 { "pio5", .xfer_mask = 1 << (ATA_SHIFT_PIO + 5) },
6134 { "pio6", .xfer_mask = 1 << (ATA_SHIFT_PIO + 6) },
6135 { "mwdma0", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 0) },
6136 { "mwdma1", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 1) },
6137 { "mwdma2", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 2) },
6138 { "mwdma3", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 3) },
6139 { "mwdma4", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 4) },
6140 { "udma0", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 0) },
6141 { "udma16", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 0) },
6142 { "udma/16", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 0) },
6143 { "udma1", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 1) },
6144 { "udma25", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 1) },
6145 { "udma/25", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 1) },
6146 { "udma2", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 2) },
6147 { "udma33", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 2) },
6148 { "udma/33", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 2) },
6149 { "udma3", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 3) },
6150 { "udma44", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 3) },
6151 { "udma/44", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 3) },
6152 { "udma4", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 4) },
6153 { "udma66", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 4) },
6154 { "udma/66", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 4) },
6155 { "udma5", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 5) },
6156 { "udma100", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 5) },
6157 { "udma/100", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 5) },
6158 { "udma6", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 6) },
6159 { "udma133", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 6) },
6160 { "udma/133", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 6) },
6161 { "udma7", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 7) },
6162 { "nohrst", .lflags = ATA_LFLAG_NO_HRST },
6163 { "nosrst", .lflags = ATA_LFLAG_NO_SRST },
6164 { "norst", .lflags = ATA_LFLAG_NO_HRST | ATA_LFLAG_NO_SRST },
6165 { "rstonce", .lflags = ATA_LFLAG_RST_ONCE },
6166 { "atapi_dmadir", .horkage_on = ATA_HORKAGE_ATAPI_DMADIR },
6167 { "disable", .horkage_on = ATA_HORKAGE_DISABLE },
6169 char *start = *cur, *p = *cur;
6170 char *id, *val, *endp;
6171 const struct ata_force_param *match_fp = NULL;
6172 int nr_matches = 0, i;
6174 /* find where this param ends and update *cur */
6175 while (*p != '\0' && *p != ',')
6186 p = strchr(start, ':');
6188 val = strstrip(start);
6193 id = strstrip(start);
6194 val = strstrip(p + 1);
6197 p = strchr(id, '.');
6200 force_ent->device = simple_strtoul(p, &endp, 10);
6201 if (p == endp || *endp != '\0') {
6202 *reason = "invalid device";
6207 force_ent->port = simple_strtoul(id, &endp, 10);
6208 if (id == endp || *endp != '\0') {
6209 *reason = "invalid port/link";
6214 /* parse val, allow shortcuts so that both 1.5 and 1.5Gbps work */
6215 for (i = 0; i < ARRAY_SIZE(force_tbl); i++) {
6216 const struct ata_force_param *fp = &force_tbl[i];
6218 if (strncasecmp(val, fp->name, strlen(val)))
6224 if (strcasecmp(val, fp->name) == 0) {
6231 *reason = "unknown value";
6234 if (nr_matches > 1) {
6235 *reason = "ambiguous value";
6239 force_ent->param = *match_fp;
6244 static void __init ata_parse_force_param(void)
6246 int idx = 0, size = 1;
6247 int last_port = -1, last_device = -1;
6248 char *p, *cur, *next;
6250 /* calculate maximum number of params and allocate force_tbl */
6251 for (p = ata_force_param_buf; *p; p++)
6255 ata_force_tbl = kcalloc(size, sizeof(ata_force_tbl[0]), GFP_KERNEL);
6256 if (!ata_force_tbl) {
6257 printk(KERN_WARNING "ata: failed to extend force table, "
6258 "libata.force ignored\n");
6262 /* parse and populate the table */
6263 for (cur = ata_force_param_buf; *cur != '\0'; cur = next) {
6264 const char *reason = "";
6265 struct ata_force_ent te = { .port = -1, .device = -1 };
6268 if (ata_parse_force_one(&next, &te, &reason)) {
6269 printk(KERN_WARNING "ata: failed to parse force "
6270 "parameter \"%s\" (%s)\n",
6275 if (te.port == -1) {
6276 te.port = last_port;
6277 te.device = last_device;
6280 ata_force_tbl[idx++] = te;
6282 last_port = te.port;
6283 last_device = te.device;
6286 ata_force_tbl_size = idx;
6289 static void ata_free_force_param(void)
6291 kfree(ata_force_tbl);
6294 static inline void ata_parse_force_param(void) { }
6295 static inline void ata_free_force_param(void) { }
6298 static int __init ata_init(void)
6302 ata_parse_force_param();
6304 rc = ata_sff_init();
6306 ata_free_force_param();
6310 libata_transport_init();
6311 ata_scsi_transport_template = ata_attach_transport();
6312 if (!ata_scsi_transport_template) {
6318 printk(KERN_DEBUG "libata version " DRV_VERSION " loaded.\n");
6325 static void __exit ata_exit(void)
6327 ata_release_transport(ata_scsi_transport_template);
6328 libata_transport_exit();
6330 ata_free_force_param();
6333 subsys_initcall(ata_init);
6334 module_exit(ata_exit);
6336 static DEFINE_RATELIMIT_STATE(ratelimit, HZ / 5, 1);
6338 int ata_ratelimit(void)
6340 return __ratelimit(&ratelimit);
6342 EXPORT_SYMBOL_GPL(ata_ratelimit);
6345 * ata_msleep - ATA EH owner aware msleep
6346 * @ap: ATA port to attribute the sleep to
6347 * @msecs: duration to sleep in milliseconds
6349 * Sleeps @msecs. If the current task is owner of @ap's EH, the
6350 * ownership is released before going to sleep and reacquired
6351 * after the sleep is complete. IOW, other ports sharing the
6352 * @ap->host will be allowed to own the EH while this task is
6358 void ata_msleep(struct ata_port *ap, unsigned int msecs)
6360 bool owns_eh = ap && ap->host->eh_owner == current;
6366 unsigned long usecs = msecs * USEC_PER_MSEC;
6367 usleep_range(usecs, usecs + 50);
6375 EXPORT_SYMBOL_GPL(ata_msleep);
6378 * ata_wait_register - wait until register value changes
6379 * @ap: ATA port to wait register for, can be NULL
6380 * @reg: IO-mapped register
6381 * @mask: Mask to apply to read register value
6382 * @val: Wait condition
6383 * @interval: polling interval in milliseconds
6384 * @timeout: timeout in milliseconds
6386 * Waiting for some bits of register to change is a common
6387 * operation for ATA controllers. This function reads 32bit LE
6388 * IO-mapped register @reg and tests for the following condition.
6390 * (*@reg & mask) != val
6392 * If the condition is met, it returns; otherwise, the process is
6393 * repeated after @interval_msec until timeout.
6396 * Kernel thread context (may sleep)
6399 * The final register value.
6401 u32 ata_wait_register(struct ata_port *ap, void __iomem *reg, u32 mask, u32 val,
6402 unsigned long interval, unsigned long timeout)
6404 unsigned long deadline;
6407 tmp = ioread32(reg);
6409 /* Calculate timeout _after_ the first read to make sure
6410 * preceding writes reach the controller before starting to
6411 * eat away the timeout.
6413 deadline = ata_deadline(jiffies, timeout);
6415 while ((tmp & mask) == val && time_before(jiffies, deadline)) {
6416 ata_msleep(ap, interval);
6417 tmp = ioread32(reg);
6422 EXPORT_SYMBOL_GPL(ata_wait_register);
6427 static unsigned int ata_dummy_qc_issue(struct ata_queued_cmd *qc)
6429 return AC_ERR_SYSTEM;
6432 static void ata_dummy_error_handler(struct ata_port *ap)
6437 struct ata_port_operations ata_dummy_port_ops = {
6438 .qc_prep = ata_noop_qc_prep,
6439 .qc_issue = ata_dummy_qc_issue,
6440 .error_handler = ata_dummy_error_handler,
6441 .sched_eh = ata_std_sched_eh,
6442 .end_eh = ata_std_end_eh,
6444 EXPORT_SYMBOL_GPL(ata_dummy_port_ops);
6446 const struct ata_port_info ata_dummy_port_info = {
6447 .port_ops = &ata_dummy_port_ops,
6449 EXPORT_SYMBOL_GPL(ata_dummy_port_info);
6452 * Utility print functions
6454 void ata_port_printk(const struct ata_port *ap, const char *level,
6455 const char *fmt, ...)
6457 struct va_format vaf;
6460 va_start(args, fmt);
6465 printk("%sata%u: %pV", level, ap->print_id, &vaf);
6469 EXPORT_SYMBOL(ata_port_printk);
6471 void ata_link_printk(const struct ata_link *link, const char *level,
6472 const char *fmt, ...)
6474 struct va_format vaf;
6477 va_start(args, fmt);
6482 if (sata_pmp_attached(link->ap) || link->ap->slave_link)
6483 printk("%sata%u.%02u: %pV",
6484 level, link->ap->print_id, link->pmp, &vaf);
6486 printk("%sata%u: %pV",
6487 level, link->ap->print_id, &vaf);
6491 EXPORT_SYMBOL(ata_link_printk);
6493 void ata_dev_printk(const struct ata_device *dev, const char *level,
6494 const char *fmt, ...)
6496 struct va_format vaf;
6499 va_start(args, fmt);
6504 printk("%sata%u.%02u: %pV",
6505 level, dev->link->ap->print_id, dev->link->pmp + dev->devno,
6510 EXPORT_SYMBOL(ata_dev_printk);
6512 void ata_print_version(const struct device *dev, const char *version)
6514 dev_printk(KERN_DEBUG, dev, "version %s\n", version);
6516 EXPORT_SYMBOL(ata_print_version);