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 (ata_dma_enabled(dev) && 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 (dev->horkage & ATA_HORKAGE_NO_ID_DEV_LOG)
2058 if (!ata_log_supported(dev, ATA_LOG_IDENTIFY_DEVICE)) {
2060 * IDENTIFY DEVICE data log is defined as mandatory starting
2061 * with ACS-3 (ATA version 10). Warn about the missing log
2062 * for drives which implement this ATA level or above.
2064 if (ata_id_major_version(dev->id) >= 10)
2066 "ATA Identify Device Log not supported\n");
2067 dev->horkage |= ATA_HORKAGE_NO_ID_DEV_LOG;
2072 * Read IDENTIFY DEVICE data log, page 0, to figure out if the page is
2075 err = ata_read_log_page(dev, ATA_LOG_IDENTIFY_DEVICE, 0, ap->sector_buf,
2080 for (i = 0; i < ap->sector_buf[8]; i++) {
2081 if (ap->sector_buf[9 + i] == page)
2088 static int ata_do_link_spd_horkage(struct ata_device *dev)
2090 struct ata_link *plink = ata_dev_phys_link(dev);
2091 u32 target, target_limit;
2093 if (!sata_scr_valid(plink))
2096 if (dev->horkage & ATA_HORKAGE_1_5_GBPS)
2101 target_limit = (1 << target) - 1;
2103 /* if already on stricter limit, no need to push further */
2104 if (plink->sata_spd_limit <= target_limit)
2107 plink->sata_spd_limit = target_limit;
2109 /* Request another EH round by returning -EAGAIN if link is
2110 * going faster than the target speed. Forward progress is
2111 * guaranteed by setting sata_spd_limit to target_limit above.
2113 if (plink->sata_spd > target) {
2114 ata_dev_info(dev, "applying link speed limit horkage to %s\n",
2115 sata_spd_string(target));
2121 static inline u8 ata_dev_knobble(struct ata_device *dev)
2123 struct ata_port *ap = dev->link->ap;
2125 if (ata_dev_blacklisted(dev) & ATA_HORKAGE_BRIDGE_OK)
2128 return ((ap->cbl == ATA_CBL_SATA) && (!ata_id_is_sata(dev->id)));
2131 static void ata_dev_config_ncq_send_recv(struct ata_device *dev)
2133 struct ata_port *ap = dev->link->ap;
2134 unsigned int err_mask;
2136 if (!ata_log_supported(dev, ATA_LOG_NCQ_SEND_RECV)) {
2137 ata_dev_warn(dev, "NCQ Send/Recv Log not supported\n");
2140 err_mask = ata_read_log_page(dev, ATA_LOG_NCQ_SEND_RECV,
2141 0, ap->sector_buf, 1);
2143 u8 *cmds = dev->ncq_send_recv_cmds;
2145 dev->flags |= ATA_DFLAG_NCQ_SEND_RECV;
2146 memcpy(cmds, ap->sector_buf, ATA_LOG_NCQ_SEND_RECV_SIZE);
2148 if (dev->horkage & ATA_HORKAGE_NO_NCQ_TRIM) {
2149 ata_dev_dbg(dev, "disabling queued TRIM support\n");
2150 cmds[ATA_LOG_NCQ_SEND_RECV_DSM_OFFSET] &=
2151 ~ATA_LOG_NCQ_SEND_RECV_DSM_TRIM;
2156 static void ata_dev_config_ncq_non_data(struct ata_device *dev)
2158 struct ata_port *ap = dev->link->ap;
2159 unsigned int err_mask;
2161 if (!ata_log_supported(dev, ATA_LOG_NCQ_NON_DATA)) {
2163 "NCQ Send/Recv Log not supported\n");
2166 err_mask = ata_read_log_page(dev, ATA_LOG_NCQ_NON_DATA,
2167 0, ap->sector_buf, 1);
2169 u8 *cmds = dev->ncq_non_data_cmds;
2171 memcpy(cmds, ap->sector_buf, ATA_LOG_NCQ_NON_DATA_SIZE);
2175 static void ata_dev_config_ncq_prio(struct ata_device *dev)
2177 struct ata_port *ap = dev->link->ap;
2178 unsigned int err_mask;
2180 err_mask = ata_read_log_page(dev,
2181 ATA_LOG_IDENTIFY_DEVICE,
2182 ATA_LOG_SATA_SETTINGS,
2188 if (!(ap->sector_buf[ATA_LOG_NCQ_PRIO_OFFSET] & BIT(3)))
2191 dev->flags |= ATA_DFLAG_NCQ_PRIO;
2196 dev->flags &= ~ATA_DFLAG_NCQ_PRIO_ENABLE;
2197 dev->flags &= ~ATA_DFLAG_NCQ_PRIO;
2200 static bool ata_dev_check_adapter(struct ata_device *dev,
2201 unsigned short vendor_id)
2203 struct pci_dev *pcidev = NULL;
2204 struct device *parent_dev = NULL;
2206 for (parent_dev = dev->tdev.parent; parent_dev != NULL;
2207 parent_dev = parent_dev->parent) {
2208 if (dev_is_pci(parent_dev)) {
2209 pcidev = to_pci_dev(parent_dev);
2210 if (pcidev->vendor == vendor_id)
2219 static int ata_dev_config_ncq(struct ata_device *dev,
2220 char *desc, size_t desc_sz)
2222 struct ata_port *ap = dev->link->ap;
2223 int hdepth = 0, ddepth = ata_id_queue_depth(dev->id);
2224 unsigned int err_mask;
2227 if (!ata_id_has_ncq(dev->id)) {
2231 if (!IS_ENABLED(CONFIG_SATA_HOST))
2233 if (dev->horkage & ATA_HORKAGE_NONCQ) {
2234 snprintf(desc, desc_sz, "NCQ (not used)");
2238 if (dev->horkage & ATA_HORKAGE_NO_NCQ_ON_ATI &&
2239 ata_dev_check_adapter(dev, PCI_VENDOR_ID_ATI)) {
2240 snprintf(desc, desc_sz, "NCQ (not used)");
2244 if (ap->flags & ATA_FLAG_NCQ) {
2245 hdepth = min(ap->scsi_host->can_queue, ATA_MAX_QUEUE);
2246 dev->flags |= ATA_DFLAG_NCQ;
2249 if (!(dev->horkage & ATA_HORKAGE_BROKEN_FPDMA_AA) &&
2250 (ap->flags & ATA_FLAG_FPDMA_AA) &&
2251 ata_id_has_fpdma_aa(dev->id)) {
2252 err_mask = ata_dev_set_feature(dev, SETFEATURES_SATA_ENABLE,
2256 "failed to enable AA (error_mask=0x%x)\n",
2258 if (err_mask != AC_ERR_DEV) {
2259 dev->horkage |= ATA_HORKAGE_BROKEN_FPDMA_AA;
2266 if (hdepth >= ddepth)
2267 snprintf(desc, desc_sz, "NCQ (depth %d)%s", ddepth, aa_desc);
2269 snprintf(desc, desc_sz, "NCQ (depth %d/%d)%s", hdepth,
2272 if ((ap->flags & ATA_FLAG_FPDMA_AUX)) {
2273 if (ata_id_has_ncq_send_and_recv(dev->id))
2274 ata_dev_config_ncq_send_recv(dev);
2275 if (ata_id_has_ncq_non_data(dev->id))
2276 ata_dev_config_ncq_non_data(dev);
2277 if (ata_id_has_ncq_prio(dev->id))
2278 ata_dev_config_ncq_prio(dev);
2284 static void ata_dev_config_sense_reporting(struct ata_device *dev)
2286 unsigned int err_mask;
2288 if (!ata_id_has_sense_reporting(dev->id))
2291 if (ata_id_sense_reporting_enabled(dev->id))
2294 err_mask = ata_dev_set_feature(dev, SETFEATURE_SENSE_DATA, 0x1);
2297 "failed to enable Sense Data Reporting, Emask 0x%x\n",
2302 static void ata_dev_config_zac(struct ata_device *dev)
2304 struct ata_port *ap = dev->link->ap;
2305 unsigned int err_mask;
2306 u8 *identify_buf = ap->sector_buf;
2308 dev->zac_zones_optimal_open = U32_MAX;
2309 dev->zac_zones_optimal_nonseq = U32_MAX;
2310 dev->zac_zones_max_open = U32_MAX;
2313 * Always set the 'ZAC' flag for Host-managed devices.
2315 if (dev->class == ATA_DEV_ZAC)
2316 dev->flags |= ATA_DFLAG_ZAC;
2317 else if (ata_id_zoned_cap(dev->id) == 0x01)
2319 * Check for host-aware devices.
2321 dev->flags |= ATA_DFLAG_ZAC;
2323 if (!(dev->flags & ATA_DFLAG_ZAC))
2326 if (!ata_identify_page_supported(dev, ATA_LOG_ZONED_INFORMATION)) {
2328 "ATA Zoned Information Log not supported\n");
2333 * Read IDENTIFY DEVICE data log, page 9 (Zoned-device information)
2335 err_mask = ata_read_log_page(dev, ATA_LOG_IDENTIFY_DEVICE,
2336 ATA_LOG_ZONED_INFORMATION,
2339 u64 zoned_cap, opt_open, opt_nonseq, max_open;
2341 zoned_cap = get_unaligned_le64(&identify_buf[8]);
2342 if ((zoned_cap >> 63))
2343 dev->zac_zoned_cap = (zoned_cap & 1);
2344 opt_open = get_unaligned_le64(&identify_buf[24]);
2345 if ((opt_open >> 63))
2346 dev->zac_zones_optimal_open = (u32)opt_open;
2347 opt_nonseq = get_unaligned_le64(&identify_buf[32]);
2348 if ((opt_nonseq >> 63))
2349 dev->zac_zones_optimal_nonseq = (u32)opt_nonseq;
2350 max_open = get_unaligned_le64(&identify_buf[40]);
2351 if ((max_open >> 63))
2352 dev->zac_zones_max_open = (u32)max_open;
2356 static void ata_dev_config_trusted(struct ata_device *dev)
2358 struct ata_port *ap = dev->link->ap;
2362 if (!ata_id_has_trusted(dev->id))
2365 if (!ata_identify_page_supported(dev, ATA_LOG_SECURITY)) {
2367 "Security Log not supported\n");
2371 err = ata_read_log_page(dev, ATA_LOG_IDENTIFY_DEVICE, ATA_LOG_SECURITY,
2376 trusted_cap = get_unaligned_le64(&ap->sector_buf[40]);
2377 if (!(trusted_cap & (1ULL << 63))) {
2379 "Trusted Computing capability qword not valid!\n");
2383 if (trusted_cap & (1 << 0))
2384 dev->flags |= ATA_DFLAG_TRUSTED;
2387 static int ata_dev_config_lba(struct ata_device *dev)
2389 struct ata_port *ap = dev->link->ap;
2390 const u16 *id = dev->id;
2391 const char *lba_desc;
2395 dev->flags |= ATA_DFLAG_LBA;
2397 if (ata_id_has_lba48(id)) {
2399 dev->flags |= ATA_DFLAG_LBA48;
2400 if (dev->n_sectors >= (1UL << 28) &&
2401 ata_id_has_flush_ext(id))
2402 dev->flags |= ATA_DFLAG_FLUSH_EXT;
2408 ret = ata_dev_config_ncq(dev, ncq_desc, sizeof(ncq_desc));
2410 /* print device info to dmesg */
2411 if (ata_msg_drv(ap) && ata_dev_print_info(dev))
2413 "%llu sectors, multi %u: %s %s\n",
2414 (unsigned long long)dev->n_sectors,
2415 dev->multi_count, lba_desc, ncq_desc);
2420 static void ata_dev_config_chs(struct ata_device *dev)
2422 struct ata_port *ap = dev->link->ap;
2423 const u16 *id = dev->id;
2425 if (ata_id_current_chs_valid(id)) {
2426 /* Current CHS translation is valid. */
2427 dev->cylinders = id[54];
2428 dev->heads = id[55];
2429 dev->sectors = id[56];
2431 /* Default translation */
2432 dev->cylinders = id[1];
2434 dev->sectors = id[6];
2437 /* print device info to dmesg */
2438 if (ata_msg_drv(ap) && ata_dev_print_info(dev))
2440 "%llu sectors, multi %u, CHS %u/%u/%u\n",
2441 (unsigned long long)dev->n_sectors,
2442 dev->multi_count, dev->cylinders,
2443 dev->heads, dev->sectors);
2446 static void ata_dev_config_devslp(struct ata_device *dev)
2448 u8 *sata_setting = dev->link->ap->sector_buf;
2449 unsigned int err_mask;
2453 * Check device sleep capability. Get DevSlp timing variables
2454 * from SATA Settings page of Identify Device Data Log.
2456 if (!ata_id_has_devslp(dev->id))
2459 err_mask = ata_read_log_page(dev,
2460 ATA_LOG_IDENTIFY_DEVICE,
2461 ATA_LOG_SATA_SETTINGS,
2466 dev->flags |= ATA_DFLAG_DEVSLP;
2467 for (i = 0; i < ATA_LOG_DEVSLP_SIZE; i++) {
2468 j = ATA_LOG_DEVSLP_OFFSET + i;
2469 dev->devslp_timing[i] = sata_setting[j];
2473 static void ata_dev_config_cpr(struct ata_device *dev)
2475 unsigned int err_mask;
2478 struct ata_cpr_log *cpr_log = NULL;
2479 u8 *desc, *buf = NULL;
2481 if (!ata_identify_page_supported(dev,
2482 ATA_LOG_CONCURRENT_POSITIONING_RANGES))
2486 * Read IDENTIFY DEVICE data log, page 0x47
2487 * (concurrent positioning ranges). We can have at most 255 32B range
2488 * descriptors plus a 64B header.
2490 buf_len = (64 + 255 * 32 + 511) & ~511;
2491 buf = kzalloc(buf_len, GFP_KERNEL);
2495 err_mask = ata_read_log_page(dev, ATA_LOG_IDENTIFY_DEVICE,
2496 ATA_LOG_CONCURRENT_POSITIONING_RANGES,
2505 cpr_log = kzalloc(struct_size(cpr_log, cpr, nr_cpr), GFP_KERNEL);
2509 cpr_log->nr_cpr = nr_cpr;
2511 for (i = 0; i < nr_cpr; i++, desc += 32) {
2512 cpr_log->cpr[i].num = desc[0];
2513 cpr_log->cpr[i].num_storage_elements = desc[1];
2514 cpr_log->cpr[i].start_lba = get_unaligned_le64(&desc[8]);
2515 cpr_log->cpr[i].num_lbas = get_unaligned_le64(&desc[16]);
2519 swap(dev->cpr_log, cpr_log);
2524 static void ata_dev_print_features(struct ata_device *dev)
2526 if (!(dev->flags & ATA_DFLAG_FEATURES_MASK))
2530 "Features:%s%s%s%s%s%s\n",
2531 dev->flags & ATA_DFLAG_TRUSTED ? " Trust" : "",
2532 dev->flags & ATA_DFLAG_DA ? " Dev-Attention" : "",
2533 dev->flags & ATA_DFLAG_DEVSLP ? " Dev-Sleep" : "",
2534 dev->flags & ATA_DFLAG_NCQ_SEND_RECV ? " NCQ-sndrcv" : "",
2535 dev->flags & ATA_DFLAG_NCQ_PRIO ? " NCQ-prio" : "",
2536 dev->cpr_log ? " CPR" : "");
2540 * ata_dev_configure - Configure the specified ATA/ATAPI device
2541 * @dev: Target device to configure
2543 * Configure @dev according to @dev->id. Generic and low-level
2544 * driver specific fixups are also applied.
2547 * Kernel thread context (may sleep)
2550 * 0 on success, -errno otherwise
2552 int ata_dev_configure(struct ata_device *dev)
2554 struct ata_port *ap = dev->link->ap;
2555 bool print_info = ata_dev_print_info(dev);
2556 const u16 *id = dev->id;
2557 unsigned long xfer_mask;
2558 unsigned int err_mask;
2559 char revbuf[7]; /* XYZ-99\0 */
2560 char fwrevbuf[ATA_ID_FW_REV_LEN+1];
2561 char modelbuf[ATA_ID_PROD_LEN+1];
2564 if (!ata_dev_enabled(dev) && ata_msg_info(ap)) {
2565 ata_dev_info(dev, "%s: ENTER/EXIT -- nodev\n", __func__);
2569 if (ata_msg_probe(ap))
2570 ata_dev_dbg(dev, "%s: ENTER\n", __func__);
2573 dev->horkage |= ata_dev_blacklisted(dev);
2574 ata_force_horkage(dev);
2576 if (dev->horkage & ATA_HORKAGE_DISABLE) {
2577 ata_dev_info(dev, "unsupported device, disabling\n");
2578 ata_dev_disable(dev);
2582 if ((!atapi_enabled || (ap->flags & ATA_FLAG_NO_ATAPI)) &&
2583 dev->class == ATA_DEV_ATAPI) {
2584 ata_dev_warn(dev, "WARNING: ATAPI is %s, device ignored\n",
2585 atapi_enabled ? "not supported with this driver"
2587 ata_dev_disable(dev);
2591 rc = ata_do_link_spd_horkage(dev);
2595 /* some WD SATA-1 drives have issues with LPM, turn on NOLPM for them */
2596 if ((dev->horkage & ATA_HORKAGE_WD_BROKEN_LPM) &&
2597 (id[ATA_ID_SATA_CAPABILITY] & 0xe) == 0x2)
2598 dev->horkage |= ATA_HORKAGE_NOLPM;
2600 if (ap->flags & ATA_FLAG_NO_LPM)
2601 dev->horkage |= ATA_HORKAGE_NOLPM;
2603 if (dev->horkage & ATA_HORKAGE_NOLPM) {
2604 ata_dev_warn(dev, "LPM support broken, forcing max_power\n");
2605 dev->link->ap->target_lpm_policy = ATA_LPM_MAX_POWER;
2608 /* let ACPI work its magic */
2609 rc = ata_acpi_on_devcfg(dev);
2613 /* massage HPA, do it early as it might change IDENTIFY data */
2614 rc = ata_hpa_resize(dev);
2618 /* print device capabilities */
2619 if (ata_msg_probe(ap))
2621 "%s: cfg 49:%04x 82:%04x 83:%04x 84:%04x "
2622 "85:%04x 86:%04x 87:%04x 88:%04x\n",
2624 id[49], id[82], id[83], id[84],
2625 id[85], id[86], id[87], id[88]);
2627 /* initialize to-be-configured parameters */
2628 dev->flags &= ~ATA_DFLAG_CFG_MASK;
2629 dev->max_sectors = 0;
2635 dev->multi_count = 0;
2638 * common ATA, ATAPI feature tests
2641 /* find max transfer mode; for printk only */
2642 xfer_mask = ata_id_xfermask(id);
2644 if (ata_msg_probe(ap))
2647 /* SCSI only uses 4-char revisions, dump full 8 chars from ATA */
2648 ata_id_c_string(dev->id, fwrevbuf, ATA_ID_FW_REV,
2651 ata_id_c_string(dev->id, modelbuf, ATA_ID_PROD,
2654 /* ATA-specific feature tests */
2655 if (dev->class == ATA_DEV_ATA || dev->class == ATA_DEV_ZAC) {
2656 if (ata_id_is_cfa(id)) {
2657 /* CPRM may make this media unusable */
2658 if (id[ATA_ID_CFA_KEY_MGMT] & 1)
2660 "supports DRM functions and may not be fully accessible\n");
2661 snprintf(revbuf, 7, "CFA");
2663 snprintf(revbuf, 7, "ATA-%d", ata_id_major_version(id));
2664 /* Warn the user if the device has TPM extensions */
2665 if (ata_id_has_tpm(id))
2667 "supports DRM functions and may not be fully accessible\n");
2670 dev->n_sectors = ata_id_n_sectors(id);
2672 /* get current R/W Multiple count setting */
2673 if ((dev->id[47] >> 8) == 0x80 && (dev->id[59] & 0x100)) {
2674 unsigned int max = dev->id[47] & 0xff;
2675 unsigned int cnt = dev->id[59] & 0xff;
2676 /* only recognize/allow powers of two here */
2677 if (is_power_of_2(max) && is_power_of_2(cnt))
2679 dev->multi_count = cnt;
2682 /* print device info to dmesg */
2683 if (ata_msg_drv(ap) && print_info)
2684 ata_dev_info(dev, "%s: %s, %s, max %s\n",
2685 revbuf, modelbuf, fwrevbuf,
2686 ata_mode_string(xfer_mask));
2688 if (ata_id_has_lba(id)) {
2689 rc = ata_dev_config_lba(dev);
2693 ata_dev_config_chs(dev);
2696 ata_dev_config_devslp(dev);
2697 ata_dev_config_sense_reporting(dev);
2698 ata_dev_config_zac(dev);
2699 ata_dev_config_trusted(dev);
2700 ata_dev_config_cpr(dev);
2703 if (ata_msg_drv(ap) && print_info)
2704 ata_dev_print_features(dev);
2707 /* ATAPI-specific feature tests */
2708 else if (dev->class == ATA_DEV_ATAPI) {
2709 const char *cdb_intr_string = "";
2710 const char *atapi_an_string = "";
2711 const char *dma_dir_string = "";
2714 rc = atapi_cdb_len(id);
2715 if ((rc < 12) || (rc > ATAPI_CDB_LEN)) {
2716 if (ata_msg_warn(ap))
2717 ata_dev_warn(dev, "unsupported CDB len\n");
2721 dev->cdb_len = (unsigned int) rc;
2723 /* Enable ATAPI AN if both the host and device have
2724 * the support. If PMP is attached, SNTF is required
2725 * to enable ATAPI AN to discern between PHY status
2726 * changed notifications and ATAPI ANs.
2729 (ap->flags & ATA_FLAG_AN) && ata_id_has_atapi_AN(id) &&
2730 (!sata_pmp_attached(ap) ||
2731 sata_scr_read(&ap->link, SCR_NOTIFICATION, &sntf) == 0)) {
2732 /* issue SET feature command to turn this on */
2733 err_mask = ata_dev_set_feature(dev,
2734 SETFEATURES_SATA_ENABLE, SATA_AN);
2737 "failed to enable ATAPI AN (err_mask=0x%x)\n",
2740 dev->flags |= ATA_DFLAG_AN;
2741 atapi_an_string = ", ATAPI AN";
2745 if (ata_id_cdb_intr(dev->id)) {
2746 dev->flags |= ATA_DFLAG_CDB_INTR;
2747 cdb_intr_string = ", CDB intr";
2750 if (atapi_dmadir || (dev->horkage & ATA_HORKAGE_ATAPI_DMADIR) || atapi_id_dmadir(dev->id)) {
2751 dev->flags |= ATA_DFLAG_DMADIR;
2752 dma_dir_string = ", DMADIR";
2755 if (ata_id_has_da(dev->id)) {
2756 dev->flags |= ATA_DFLAG_DA;
2760 /* print device info to dmesg */
2761 if (ata_msg_drv(ap) && print_info)
2763 "ATAPI: %s, %s, max %s%s%s%s\n",
2765 ata_mode_string(xfer_mask),
2766 cdb_intr_string, atapi_an_string,
2770 /* determine max_sectors */
2771 dev->max_sectors = ATA_MAX_SECTORS;
2772 if (dev->flags & ATA_DFLAG_LBA48)
2773 dev->max_sectors = ATA_MAX_SECTORS_LBA48;
2775 /* Limit PATA drive on SATA cable bridge transfers to udma5,
2777 if (ata_dev_knobble(dev)) {
2778 if (ata_msg_drv(ap) && print_info)
2779 ata_dev_info(dev, "applying bridge limits\n");
2780 dev->udma_mask &= ATA_UDMA5;
2781 dev->max_sectors = ATA_MAX_SECTORS;
2784 if ((dev->class == ATA_DEV_ATAPI) &&
2785 (atapi_command_packet_set(id) == TYPE_TAPE)) {
2786 dev->max_sectors = ATA_MAX_SECTORS_TAPE;
2787 dev->horkage |= ATA_HORKAGE_STUCK_ERR;
2790 if (dev->horkage & ATA_HORKAGE_MAX_SEC_128)
2791 dev->max_sectors = min_t(unsigned int, ATA_MAX_SECTORS_128,
2794 if (dev->horkage & ATA_HORKAGE_MAX_SEC_1024)
2795 dev->max_sectors = min_t(unsigned int, ATA_MAX_SECTORS_1024,
2798 if (dev->horkage & ATA_HORKAGE_MAX_SEC_LBA48)
2799 dev->max_sectors = ATA_MAX_SECTORS_LBA48;
2801 if (ap->ops->dev_config)
2802 ap->ops->dev_config(dev);
2804 if (dev->horkage & ATA_HORKAGE_DIAGNOSTIC) {
2805 /* Let the user know. We don't want to disallow opens for
2806 rescue purposes, or in case the vendor is just a blithering
2807 idiot. Do this after the dev_config call as some controllers
2808 with buggy firmware may want to avoid reporting false device
2813 "Drive reports diagnostics failure. This may indicate a drive\n");
2815 "fault or invalid emulation. Contact drive vendor for information.\n");
2819 if ((dev->horkage & ATA_HORKAGE_FIRMWARE_WARN) && print_info) {
2820 ata_dev_warn(dev, "WARNING: device requires firmware update to be fully functional\n");
2821 ata_dev_warn(dev, " contact the vendor or visit http://ata.wiki.kernel.org\n");
2827 if (ata_msg_probe(ap))
2828 ata_dev_dbg(dev, "%s: EXIT, err\n", __func__);
2833 * ata_cable_40wire - return 40 wire cable type
2836 * Helper method for drivers which want to hardwire 40 wire cable
2840 int ata_cable_40wire(struct ata_port *ap)
2842 return ATA_CBL_PATA40;
2844 EXPORT_SYMBOL_GPL(ata_cable_40wire);
2847 * ata_cable_80wire - return 80 wire cable type
2850 * Helper method for drivers which want to hardwire 80 wire cable
2854 int ata_cable_80wire(struct ata_port *ap)
2856 return ATA_CBL_PATA80;
2858 EXPORT_SYMBOL_GPL(ata_cable_80wire);
2861 * ata_cable_unknown - return unknown PATA cable.
2864 * Helper method for drivers which have no PATA cable detection.
2867 int ata_cable_unknown(struct ata_port *ap)
2869 return ATA_CBL_PATA_UNK;
2871 EXPORT_SYMBOL_GPL(ata_cable_unknown);
2874 * ata_cable_ignore - return ignored PATA cable.
2877 * Helper method for drivers which don't use cable type to limit
2880 int ata_cable_ignore(struct ata_port *ap)
2882 return ATA_CBL_PATA_IGN;
2884 EXPORT_SYMBOL_GPL(ata_cable_ignore);
2887 * ata_cable_sata - return SATA cable type
2890 * Helper method for drivers which have SATA cables
2893 int ata_cable_sata(struct ata_port *ap)
2895 return ATA_CBL_SATA;
2897 EXPORT_SYMBOL_GPL(ata_cable_sata);
2900 * ata_bus_probe - Reset and probe ATA bus
2903 * Master ATA bus probing function. Initiates a hardware-dependent
2904 * bus reset, then attempts to identify any devices found on
2908 * PCI/etc. bus probe sem.
2911 * Zero on success, negative errno otherwise.
2914 int ata_bus_probe(struct ata_port *ap)
2916 unsigned int classes[ATA_MAX_DEVICES];
2917 int tries[ATA_MAX_DEVICES];
2919 struct ata_device *dev;
2921 ata_for_each_dev(dev, &ap->link, ALL)
2922 tries[dev->devno] = ATA_PROBE_MAX_TRIES;
2925 ata_for_each_dev(dev, &ap->link, ALL) {
2926 /* If we issue an SRST then an ATA drive (not ATAPI)
2927 * may change configuration and be in PIO0 timing. If
2928 * we do a hard reset (or are coming from power on)
2929 * this is true for ATA or ATAPI. Until we've set a
2930 * suitable controller mode we should not touch the
2931 * bus as we may be talking too fast.
2933 dev->pio_mode = XFER_PIO_0;
2934 dev->dma_mode = 0xff;
2936 /* If the controller has a pio mode setup function
2937 * then use it to set the chipset to rights. Don't
2938 * touch the DMA setup as that will be dealt with when
2939 * configuring devices.
2941 if (ap->ops->set_piomode)
2942 ap->ops->set_piomode(ap, dev);
2945 /* reset and determine device classes */
2946 ap->ops->phy_reset(ap);
2948 ata_for_each_dev(dev, &ap->link, ALL) {
2949 if (dev->class != ATA_DEV_UNKNOWN)
2950 classes[dev->devno] = dev->class;
2952 classes[dev->devno] = ATA_DEV_NONE;
2954 dev->class = ATA_DEV_UNKNOWN;
2957 /* read IDENTIFY page and configure devices. We have to do the identify
2958 specific sequence bass-ackwards so that PDIAG- is released by
2961 ata_for_each_dev(dev, &ap->link, ALL_REVERSE) {
2962 if (tries[dev->devno])
2963 dev->class = classes[dev->devno];
2965 if (!ata_dev_enabled(dev))
2968 rc = ata_dev_read_id(dev, &dev->class, ATA_READID_POSTRESET,
2974 /* Now ask for the cable type as PDIAG- should have been released */
2975 if (ap->ops->cable_detect)
2976 ap->cbl = ap->ops->cable_detect(ap);
2978 /* We may have SATA bridge glue hiding here irrespective of
2979 * the reported cable types and sensed types. When SATA
2980 * drives indicate we have a bridge, we don't know which end
2981 * of the link the bridge is which is a problem.
2983 ata_for_each_dev(dev, &ap->link, ENABLED)
2984 if (ata_id_is_sata(dev->id))
2985 ap->cbl = ATA_CBL_SATA;
2987 /* After the identify sequence we can now set up the devices. We do
2988 this in the normal order so that the user doesn't get confused */
2990 ata_for_each_dev(dev, &ap->link, ENABLED) {
2991 ap->link.eh_context.i.flags |= ATA_EHI_PRINTINFO;
2992 rc = ata_dev_configure(dev);
2993 ap->link.eh_context.i.flags &= ~ATA_EHI_PRINTINFO;
2998 /* configure transfer mode */
2999 rc = ata_set_mode(&ap->link, &dev);
3003 ata_for_each_dev(dev, &ap->link, ENABLED)
3009 tries[dev->devno]--;
3013 /* eeek, something went very wrong, give up */
3014 tries[dev->devno] = 0;
3018 /* give it just one more chance */
3019 tries[dev->devno] = min(tries[dev->devno], 1);
3022 if (tries[dev->devno] == 1) {
3023 /* This is the last chance, better to slow
3024 * down than lose it.
3026 sata_down_spd_limit(&ap->link, 0);
3027 ata_down_xfermask_limit(dev, ATA_DNXFER_PIO);
3031 if (!tries[dev->devno])
3032 ata_dev_disable(dev);
3038 * sata_print_link_status - Print SATA link status
3039 * @link: SATA link to printk link status about
3041 * This function prints link speed and status of a SATA link.
3046 static void sata_print_link_status(struct ata_link *link)
3048 u32 sstatus, scontrol, tmp;
3050 if (sata_scr_read(link, SCR_STATUS, &sstatus))
3052 sata_scr_read(link, SCR_CONTROL, &scontrol);
3054 if (ata_phys_link_online(link)) {
3055 tmp = (sstatus >> 4) & 0xf;
3056 ata_link_info(link, "SATA link up %s (SStatus %X SControl %X)\n",
3057 sata_spd_string(tmp), sstatus, scontrol);
3059 ata_link_info(link, "SATA link down (SStatus %X SControl %X)\n",
3065 * ata_dev_pair - return other device on cable
3068 * Obtain the other device on the same cable, or if none is
3069 * present NULL is returned
3072 struct ata_device *ata_dev_pair(struct ata_device *adev)
3074 struct ata_link *link = adev->link;
3075 struct ata_device *pair = &link->device[1 - adev->devno];
3076 if (!ata_dev_enabled(pair))
3080 EXPORT_SYMBOL_GPL(ata_dev_pair);
3083 * sata_down_spd_limit - adjust SATA spd limit downward
3084 * @link: Link to adjust SATA spd limit for
3085 * @spd_limit: Additional limit
3087 * Adjust SATA spd limit of @link downward. Note that this
3088 * function only adjusts the limit. The change must be applied
3089 * using sata_set_spd().
3091 * If @spd_limit is non-zero, the speed is limited to equal to or
3092 * lower than @spd_limit if such speed is supported. If
3093 * @spd_limit is slower than any supported speed, only the lowest
3094 * supported speed is allowed.
3097 * Inherited from caller.
3100 * 0 on success, negative errno on failure
3102 int sata_down_spd_limit(struct ata_link *link, u32 spd_limit)
3104 u32 sstatus, spd, mask;
3107 if (!sata_scr_valid(link))
3110 /* If SCR can be read, use it to determine the current SPD.
3111 * If not, use cached value in link->sata_spd.
3113 rc = sata_scr_read(link, SCR_STATUS, &sstatus);
3114 if (rc == 0 && ata_sstatus_online(sstatus))
3115 spd = (sstatus >> 4) & 0xf;
3117 spd = link->sata_spd;
3119 mask = link->sata_spd_limit;
3123 /* unconditionally mask off the highest bit */
3124 bit = fls(mask) - 1;
3125 mask &= ~(1 << bit);
3128 * Mask off all speeds higher than or equal to the current one. At
3129 * this point, if current SPD is not available and we previously
3130 * recorded the link speed from SStatus, the driver has already
3131 * masked off the highest bit so mask should already be 1 or 0.
3132 * Otherwise, we should not force 1.5Gbps on a link where we have
3133 * not previously recorded speed from SStatus. Just return in this
3137 mask &= (1 << (spd - 1)) - 1;
3141 /* were we already at the bottom? */
3146 if (mask & ((1 << spd_limit) - 1))
3147 mask &= (1 << spd_limit) - 1;
3149 bit = ffs(mask) - 1;
3154 link->sata_spd_limit = mask;
3156 ata_link_warn(link, "limiting SATA link speed to %s\n",
3157 sata_spd_string(fls(mask)));
3162 #ifdef CONFIG_ATA_ACPI
3164 * ata_timing_cycle2mode - find xfer mode for the specified cycle duration
3165 * @xfer_shift: ATA_SHIFT_* value for transfer type to examine.
3166 * @cycle: cycle duration in ns
3168 * Return matching xfer mode for @cycle. The returned mode is of
3169 * the transfer type specified by @xfer_shift. If @cycle is too
3170 * slow for @xfer_shift, 0xff is returned. If @cycle is faster
3171 * than the fastest known mode, the fasted mode is returned.
3177 * Matching xfer_mode, 0xff if no match found.
3179 u8 ata_timing_cycle2mode(unsigned int xfer_shift, int cycle)
3181 u8 base_mode = 0xff, last_mode = 0xff;
3182 const struct ata_xfer_ent *ent;
3183 const struct ata_timing *t;
3185 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
3186 if (ent->shift == xfer_shift)
3187 base_mode = ent->base;
3189 for (t = ata_timing_find_mode(base_mode);
3190 t && ata_xfer_mode2shift(t->mode) == xfer_shift; t++) {
3191 unsigned short this_cycle;
3193 switch (xfer_shift) {
3195 case ATA_SHIFT_MWDMA:
3196 this_cycle = t->cycle;
3198 case ATA_SHIFT_UDMA:
3199 this_cycle = t->udma;
3205 if (cycle > this_cycle)
3208 last_mode = t->mode;
3216 * ata_down_xfermask_limit - adjust dev xfer masks downward
3217 * @dev: Device to adjust xfer masks
3218 * @sel: ATA_DNXFER_* selector
3220 * Adjust xfer masks of @dev downward. Note that this function
3221 * does not apply the change. Invoking ata_set_mode() afterwards
3222 * will apply the limit.
3225 * Inherited from caller.
3228 * 0 on success, negative errno on failure
3230 int ata_down_xfermask_limit(struct ata_device *dev, unsigned int sel)
3233 unsigned long orig_mask, xfer_mask;
3234 unsigned long pio_mask, mwdma_mask, udma_mask;
3237 quiet = !!(sel & ATA_DNXFER_QUIET);
3238 sel &= ~ATA_DNXFER_QUIET;
3240 xfer_mask = orig_mask = ata_pack_xfermask(dev->pio_mask,
3243 ata_unpack_xfermask(xfer_mask, &pio_mask, &mwdma_mask, &udma_mask);
3246 case ATA_DNXFER_PIO:
3247 highbit = fls(pio_mask) - 1;
3248 pio_mask &= ~(1 << highbit);
3251 case ATA_DNXFER_DMA:
3253 highbit = fls(udma_mask) - 1;
3254 udma_mask &= ~(1 << highbit);
3257 } else if (mwdma_mask) {
3258 highbit = fls(mwdma_mask) - 1;
3259 mwdma_mask &= ~(1 << highbit);
3265 case ATA_DNXFER_40C:
3266 udma_mask &= ATA_UDMA_MASK_40C;
3269 case ATA_DNXFER_FORCE_PIO0:
3272 case ATA_DNXFER_FORCE_PIO:
3281 xfer_mask &= ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask);
3283 if (!(xfer_mask & ATA_MASK_PIO) || xfer_mask == orig_mask)
3287 if (xfer_mask & (ATA_MASK_MWDMA | ATA_MASK_UDMA))
3288 snprintf(buf, sizeof(buf), "%s:%s",
3289 ata_mode_string(xfer_mask),
3290 ata_mode_string(xfer_mask & ATA_MASK_PIO));
3292 snprintf(buf, sizeof(buf), "%s",
3293 ata_mode_string(xfer_mask));
3295 ata_dev_warn(dev, "limiting speed to %s\n", buf);
3298 ata_unpack_xfermask(xfer_mask, &dev->pio_mask, &dev->mwdma_mask,
3304 static int ata_dev_set_mode(struct ata_device *dev)
3306 struct ata_port *ap = dev->link->ap;
3307 struct ata_eh_context *ehc = &dev->link->eh_context;
3308 const bool nosetxfer = dev->horkage & ATA_HORKAGE_NOSETXFER;
3309 const char *dev_err_whine = "";
3310 int ign_dev_err = 0;
3311 unsigned int err_mask = 0;
3314 dev->flags &= ~ATA_DFLAG_PIO;
3315 if (dev->xfer_shift == ATA_SHIFT_PIO)
3316 dev->flags |= ATA_DFLAG_PIO;
3318 if (nosetxfer && ap->flags & ATA_FLAG_SATA && ata_id_is_sata(dev->id))
3319 dev_err_whine = " (SET_XFERMODE skipped)";
3323 "NOSETXFER but PATA detected - can't "
3324 "skip SETXFER, might malfunction\n");
3325 err_mask = ata_dev_set_xfermode(dev);
3328 if (err_mask & ~AC_ERR_DEV)
3332 ehc->i.flags |= ATA_EHI_POST_SETMODE;
3333 rc = ata_dev_revalidate(dev, ATA_DEV_UNKNOWN, 0);
3334 ehc->i.flags &= ~ATA_EHI_POST_SETMODE;
3338 if (dev->xfer_shift == ATA_SHIFT_PIO) {
3339 /* Old CFA may refuse this command, which is just fine */
3340 if (ata_id_is_cfa(dev->id))
3342 /* Catch several broken garbage emulations plus some pre
3344 if (ata_id_major_version(dev->id) == 0 &&
3345 dev->pio_mode <= XFER_PIO_2)
3347 /* Some very old devices and some bad newer ones fail
3348 any kind of SET_XFERMODE request but support PIO0-2
3349 timings and no IORDY */
3350 if (!ata_id_has_iordy(dev->id) && dev->pio_mode <= XFER_PIO_2)
3353 /* Early MWDMA devices do DMA but don't allow DMA mode setting.
3354 Don't fail an MWDMA0 set IFF the device indicates it is in MWDMA0 */
3355 if (dev->xfer_shift == ATA_SHIFT_MWDMA &&
3356 dev->dma_mode == XFER_MW_DMA_0 &&
3357 (dev->id[63] >> 8) & 1)
3360 /* if the device is actually configured correctly, ignore dev err */
3361 if (dev->xfer_mode == ata_xfer_mask2mode(ata_id_xfermask(dev->id)))
3364 if (err_mask & AC_ERR_DEV) {
3368 dev_err_whine = " (device error ignored)";
3371 DPRINTK("xfer_shift=%u, xfer_mode=0x%x\n",
3372 dev->xfer_shift, (int)dev->xfer_mode);
3374 if (!(ehc->i.flags & ATA_EHI_QUIET) ||
3375 ehc->i.flags & ATA_EHI_DID_HARDRESET)
3376 ata_dev_info(dev, "configured for %s%s\n",
3377 ata_mode_string(ata_xfer_mode2mask(dev->xfer_mode)),
3383 ata_dev_err(dev, "failed to set xfermode (err_mask=0x%x)\n", err_mask);
3388 * ata_do_set_mode - Program timings and issue SET FEATURES - XFER
3389 * @link: link on which timings will be programmed
3390 * @r_failed_dev: out parameter for failed device
3392 * Standard implementation of the function used to tune and set
3393 * ATA device disk transfer mode (PIO3, UDMA6, etc.). If
3394 * ata_dev_set_mode() fails, pointer to the failing device is
3395 * returned in @r_failed_dev.
3398 * PCI/etc. bus probe sem.
3401 * 0 on success, negative errno otherwise
3404 int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev)
3406 struct ata_port *ap = link->ap;
3407 struct ata_device *dev;
3408 int rc = 0, used_dma = 0, found = 0;
3410 /* step 1: calculate xfer_mask */
3411 ata_for_each_dev(dev, link, ENABLED) {
3412 unsigned long pio_mask, dma_mask;
3413 unsigned int mode_mask;
3415 mode_mask = ATA_DMA_MASK_ATA;
3416 if (dev->class == ATA_DEV_ATAPI)
3417 mode_mask = ATA_DMA_MASK_ATAPI;
3418 else if (ata_id_is_cfa(dev->id))
3419 mode_mask = ATA_DMA_MASK_CFA;
3421 ata_dev_xfermask(dev);
3422 ata_force_xfermask(dev);
3424 pio_mask = ata_pack_xfermask(dev->pio_mask, 0, 0);
3426 if (libata_dma_mask & mode_mask)
3427 dma_mask = ata_pack_xfermask(0, dev->mwdma_mask,
3432 dev->pio_mode = ata_xfer_mask2mode(pio_mask);
3433 dev->dma_mode = ata_xfer_mask2mode(dma_mask);
3436 if (ata_dma_enabled(dev))
3442 /* step 2: always set host PIO timings */
3443 ata_for_each_dev(dev, link, ENABLED) {
3444 if (dev->pio_mode == 0xff) {
3445 ata_dev_warn(dev, "no PIO support\n");
3450 dev->xfer_mode = dev->pio_mode;
3451 dev->xfer_shift = ATA_SHIFT_PIO;
3452 if (ap->ops->set_piomode)
3453 ap->ops->set_piomode(ap, dev);
3456 /* step 3: set host DMA timings */
3457 ata_for_each_dev(dev, link, ENABLED) {
3458 if (!ata_dma_enabled(dev))
3461 dev->xfer_mode = dev->dma_mode;
3462 dev->xfer_shift = ata_xfer_mode2shift(dev->dma_mode);
3463 if (ap->ops->set_dmamode)
3464 ap->ops->set_dmamode(ap, dev);
3467 /* step 4: update devices' xfer mode */
3468 ata_for_each_dev(dev, link, ENABLED) {
3469 rc = ata_dev_set_mode(dev);
3474 /* Record simplex status. If we selected DMA then the other
3475 * host channels are not permitted to do so.
3477 if (used_dma && (ap->host->flags & ATA_HOST_SIMPLEX))
3478 ap->host->simplex_claimed = ap;
3482 *r_failed_dev = dev;
3485 EXPORT_SYMBOL_GPL(ata_do_set_mode);
3488 * ata_wait_ready - wait for link to become ready
3489 * @link: link to be waited on
3490 * @deadline: deadline jiffies for the operation
3491 * @check_ready: callback to check link readiness
3493 * Wait for @link to become ready. @check_ready should return
3494 * positive number if @link is ready, 0 if it isn't, -ENODEV if
3495 * link doesn't seem to be occupied, other errno for other error
3498 * Transient -ENODEV conditions are allowed for
3499 * ATA_TMOUT_FF_WAIT.
3505 * 0 if @link is ready before @deadline; otherwise, -errno.
3507 int ata_wait_ready(struct ata_link *link, unsigned long deadline,
3508 int (*check_ready)(struct ata_link *link))
3510 unsigned long start = jiffies;
3511 unsigned long nodev_deadline;
3514 /* choose which 0xff timeout to use, read comment in libata.h */
3515 if (link->ap->host->flags & ATA_HOST_PARALLEL_SCAN)
3516 nodev_deadline = ata_deadline(start, ATA_TMOUT_FF_WAIT_LONG);
3518 nodev_deadline = ata_deadline(start, ATA_TMOUT_FF_WAIT);
3520 /* Slave readiness can't be tested separately from master. On
3521 * M/S emulation configuration, this function should be called
3522 * only on the master and it will handle both master and slave.
3524 WARN_ON(link == link->ap->slave_link);
3526 if (time_after(nodev_deadline, deadline))
3527 nodev_deadline = deadline;
3530 unsigned long now = jiffies;
3533 ready = tmp = check_ready(link);
3538 * -ENODEV could be transient. Ignore -ENODEV if link
3539 * is online. Also, some SATA devices take a long
3540 * time to clear 0xff after reset. Wait for
3541 * ATA_TMOUT_FF_WAIT[_LONG] on -ENODEV if link isn't
3544 * Note that some PATA controllers (pata_ali) explode
3545 * if status register is read more than once when
3546 * there's no device attached.
3548 if (ready == -ENODEV) {
3549 if (ata_link_online(link))
3551 else if ((link->ap->flags & ATA_FLAG_SATA) &&
3552 !ata_link_offline(link) &&
3553 time_before(now, nodev_deadline))
3559 if (time_after(now, deadline))
3562 if (!warned && time_after(now, start + 5 * HZ) &&
3563 (deadline - now > 3 * HZ)) {
3565 "link is slow to respond, please be patient "
3566 "(ready=%d)\n", tmp);
3570 ata_msleep(link->ap, 50);
3575 * ata_wait_after_reset - wait for link to become ready after reset
3576 * @link: link to be waited on
3577 * @deadline: deadline jiffies for the operation
3578 * @check_ready: callback to check link readiness
3580 * Wait for @link to become ready after reset.
3586 * 0 if @link is ready before @deadline; otherwise, -errno.
3588 int ata_wait_after_reset(struct ata_link *link, unsigned long deadline,
3589 int (*check_ready)(struct ata_link *link))
3591 ata_msleep(link->ap, ATA_WAIT_AFTER_RESET);
3593 return ata_wait_ready(link, deadline, check_ready);
3595 EXPORT_SYMBOL_GPL(ata_wait_after_reset);
3598 * ata_std_prereset - prepare for reset
3599 * @link: ATA link to be reset
3600 * @deadline: deadline jiffies for the operation
3602 * @link is about to be reset. Initialize it. Failure from
3603 * prereset makes libata abort whole reset sequence and give up
3604 * that port, so prereset should be best-effort. It does its
3605 * best to prepare for reset sequence but if things go wrong, it
3606 * should just whine, not fail.
3609 * Kernel thread context (may sleep)
3612 * 0 on success, -errno otherwise.
3614 int ata_std_prereset(struct ata_link *link, unsigned long deadline)
3616 struct ata_port *ap = link->ap;
3617 struct ata_eh_context *ehc = &link->eh_context;
3618 const unsigned long *timing = sata_ehc_deb_timing(ehc);
3621 /* if we're about to do hardreset, nothing more to do */
3622 if (ehc->i.action & ATA_EH_HARDRESET)
3625 /* if SATA, resume link */
3626 if (ap->flags & ATA_FLAG_SATA) {
3627 rc = sata_link_resume(link, timing, deadline);
3628 /* whine about phy resume failure but proceed */
3629 if (rc && rc != -EOPNOTSUPP)
3631 "failed to resume link for reset (errno=%d)\n",
3635 /* no point in trying softreset on offline link */
3636 if (ata_phys_link_offline(link))
3637 ehc->i.action &= ~ATA_EH_SOFTRESET;
3641 EXPORT_SYMBOL_GPL(ata_std_prereset);
3644 * sata_std_hardreset - COMRESET w/o waiting or classification
3645 * @link: link to reset
3646 * @class: resulting class of attached device
3647 * @deadline: deadline jiffies for the operation
3649 * Standard SATA COMRESET w/o waiting or classification.
3652 * Kernel thread context (may sleep)
3655 * 0 if link offline, -EAGAIN if link online, -errno on errors.
3657 int sata_std_hardreset(struct ata_link *link, unsigned int *class,
3658 unsigned long deadline)
3660 const unsigned long *timing = sata_ehc_deb_timing(&link->eh_context);
3665 rc = sata_link_hardreset(link, timing, deadline, &online, NULL);
3666 return online ? -EAGAIN : rc;
3668 EXPORT_SYMBOL_GPL(sata_std_hardreset);
3671 * ata_std_postreset - standard postreset callback
3672 * @link: the target ata_link
3673 * @classes: classes of attached devices
3675 * This function is invoked after a successful reset. Note that
3676 * the device might have been reset more than once using
3677 * different reset methods before postreset is invoked.
3680 * Kernel thread context (may sleep)
3682 void ata_std_postreset(struct ata_link *link, unsigned int *classes)
3688 /* reset complete, clear SError */
3689 if (!sata_scr_read(link, SCR_ERROR, &serror))
3690 sata_scr_write(link, SCR_ERROR, serror);
3692 /* print link status */
3693 sata_print_link_status(link);
3697 EXPORT_SYMBOL_GPL(ata_std_postreset);
3700 * ata_dev_same_device - Determine whether new ID matches configured device
3701 * @dev: device to compare against
3702 * @new_class: class of the new device
3703 * @new_id: IDENTIFY page of the new device
3705 * Compare @new_class and @new_id against @dev and determine
3706 * whether @dev is the device indicated by @new_class and
3713 * 1 if @dev matches @new_class and @new_id, 0 otherwise.
3715 static int ata_dev_same_device(struct ata_device *dev, unsigned int new_class,
3718 const u16 *old_id = dev->id;
3719 unsigned char model[2][ATA_ID_PROD_LEN + 1];
3720 unsigned char serial[2][ATA_ID_SERNO_LEN + 1];
3722 if (dev->class != new_class) {
3723 ata_dev_info(dev, "class mismatch %d != %d\n",
3724 dev->class, new_class);
3728 ata_id_c_string(old_id, model[0], ATA_ID_PROD, sizeof(model[0]));
3729 ata_id_c_string(new_id, model[1], ATA_ID_PROD, sizeof(model[1]));
3730 ata_id_c_string(old_id, serial[0], ATA_ID_SERNO, sizeof(serial[0]));
3731 ata_id_c_string(new_id, serial[1], ATA_ID_SERNO, sizeof(serial[1]));
3733 if (strcmp(model[0], model[1])) {
3734 ata_dev_info(dev, "model number mismatch '%s' != '%s'\n",
3735 model[0], model[1]);
3739 if (strcmp(serial[0], serial[1])) {
3740 ata_dev_info(dev, "serial number mismatch '%s' != '%s'\n",
3741 serial[0], serial[1]);
3749 * ata_dev_reread_id - Re-read IDENTIFY data
3750 * @dev: target ATA device
3751 * @readid_flags: read ID flags
3753 * Re-read IDENTIFY page and make sure @dev is still attached to
3757 * Kernel thread context (may sleep)
3760 * 0 on success, negative errno otherwise
3762 int ata_dev_reread_id(struct ata_device *dev, unsigned int readid_flags)
3764 unsigned int class = dev->class;
3765 u16 *id = (void *)dev->link->ap->sector_buf;
3769 rc = ata_dev_read_id(dev, &class, readid_flags, id);
3773 /* is the device still there? */
3774 if (!ata_dev_same_device(dev, class, id))
3777 memcpy(dev->id, id, sizeof(id[0]) * ATA_ID_WORDS);
3782 * ata_dev_revalidate - Revalidate ATA device
3783 * @dev: device to revalidate
3784 * @new_class: new class code
3785 * @readid_flags: read ID flags
3787 * Re-read IDENTIFY page, make sure @dev is still attached to the
3788 * port and reconfigure it according to the new IDENTIFY page.
3791 * Kernel thread context (may sleep)
3794 * 0 on success, negative errno otherwise
3796 int ata_dev_revalidate(struct ata_device *dev, unsigned int new_class,
3797 unsigned int readid_flags)
3799 u64 n_sectors = dev->n_sectors;
3800 u64 n_native_sectors = dev->n_native_sectors;
3803 if (!ata_dev_enabled(dev))
3806 /* fail early if !ATA && !ATAPI to avoid issuing [P]IDENTIFY to PMP */
3807 if (ata_class_enabled(new_class) &&
3808 new_class != ATA_DEV_ATA &&
3809 new_class != ATA_DEV_ATAPI &&
3810 new_class != ATA_DEV_ZAC &&
3811 new_class != ATA_DEV_SEMB) {
3812 ata_dev_info(dev, "class mismatch %u != %u\n",
3813 dev->class, new_class);
3819 rc = ata_dev_reread_id(dev, readid_flags);
3823 /* configure device according to the new ID */
3824 rc = ata_dev_configure(dev);
3828 /* verify n_sectors hasn't changed */
3829 if (dev->class != ATA_DEV_ATA || !n_sectors ||
3830 dev->n_sectors == n_sectors)
3833 /* n_sectors has changed */
3834 ata_dev_warn(dev, "n_sectors mismatch %llu != %llu\n",
3835 (unsigned long long)n_sectors,
3836 (unsigned long long)dev->n_sectors);
3839 * Something could have caused HPA to be unlocked
3840 * involuntarily. If n_native_sectors hasn't changed and the
3841 * new size matches it, keep the device.
3843 if (dev->n_native_sectors == n_native_sectors &&
3844 dev->n_sectors > n_sectors && dev->n_sectors == n_native_sectors) {
3846 "new n_sectors matches native, probably "
3847 "late HPA unlock, n_sectors updated\n");
3848 /* use the larger n_sectors */
3853 * Some BIOSes boot w/o HPA but resume w/ HPA locked. Try
3854 * unlocking HPA in those cases.
3856 * https://bugzilla.kernel.org/show_bug.cgi?id=15396
3858 if (dev->n_native_sectors == n_native_sectors &&
3859 dev->n_sectors < n_sectors && n_sectors == n_native_sectors &&
3860 !(dev->horkage & ATA_HORKAGE_BROKEN_HPA)) {
3862 "old n_sectors matches native, probably "
3863 "late HPA lock, will try to unlock HPA\n");
3864 /* try unlocking HPA */
3865 dev->flags |= ATA_DFLAG_UNLOCK_HPA;
3870 /* restore original n_[native_]sectors and fail */
3871 dev->n_native_sectors = n_native_sectors;
3872 dev->n_sectors = n_sectors;
3874 ata_dev_err(dev, "revalidation failed (errno=%d)\n", rc);
3878 struct ata_blacklist_entry {
3879 const char *model_num;
3880 const char *model_rev;
3881 unsigned long horkage;
3884 static const struct ata_blacklist_entry ata_device_blacklist [] = {
3885 /* Devices with DMA related problems under Linux */
3886 { "WDC AC11000H", NULL, ATA_HORKAGE_NODMA },
3887 { "WDC AC22100H", NULL, ATA_HORKAGE_NODMA },
3888 { "WDC AC32500H", NULL, ATA_HORKAGE_NODMA },
3889 { "WDC AC33100H", NULL, ATA_HORKAGE_NODMA },
3890 { "WDC AC31600H", NULL, ATA_HORKAGE_NODMA },
3891 { "WDC AC32100H", "24.09P07", ATA_HORKAGE_NODMA },
3892 { "WDC AC23200L", "21.10N21", ATA_HORKAGE_NODMA },
3893 { "Compaq CRD-8241B", NULL, ATA_HORKAGE_NODMA },
3894 { "CRD-8400B", NULL, ATA_HORKAGE_NODMA },
3895 { "CRD-848[02]B", NULL, ATA_HORKAGE_NODMA },
3896 { "CRD-84", NULL, ATA_HORKAGE_NODMA },
3897 { "SanDisk SDP3B", NULL, ATA_HORKAGE_NODMA },
3898 { "SanDisk SDP3B-64", NULL, ATA_HORKAGE_NODMA },
3899 { "SANYO CD-ROM CRD", NULL, ATA_HORKAGE_NODMA },
3900 { "HITACHI CDR-8", NULL, ATA_HORKAGE_NODMA },
3901 { "HITACHI CDR-8[34]35",NULL, ATA_HORKAGE_NODMA },
3902 { "Toshiba CD-ROM XM-6202B", NULL, ATA_HORKAGE_NODMA },
3903 { "TOSHIBA CD-ROM XM-1702BC", NULL, ATA_HORKAGE_NODMA },
3904 { "CD-532E-A", NULL, ATA_HORKAGE_NODMA },
3905 { "E-IDE CD-ROM CR-840",NULL, ATA_HORKAGE_NODMA },
3906 { "CD-ROM Drive/F5A", NULL, ATA_HORKAGE_NODMA },
3907 { "WPI CDD-820", NULL, ATA_HORKAGE_NODMA },
3908 { "SAMSUNG CD-ROM SC-148C", NULL, ATA_HORKAGE_NODMA },
3909 { "SAMSUNG CD-ROM SC", NULL, ATA_HORKAGE_NODMA },
3910 { "ATAPI CD-ROM DRIVE 40X MAXIMUM",NULL,ATA_HORKAGE_NODMA },
3911 { "_NEC DV5800A", NULL, ATA_HORKAGE_NODMA },
3912 { "SAMSUNG CD-ROM SN-124", "N001", ATA_HORKAGE_NODMA },
3913 { "Seagate STT20000A", NULL, ATA_HORKAGE_NODMA },
3914 { " 2GB ATA Flash Disk", "ADMA428M", ATA_HORKAGE_NODMA },
3915 { "VRFDFC22048UCHC-TE*", NULL, ATA_HORKAGE_NODMA },
3916 /* Odd clown on sil3726/4726 PMPs */
3917 { "Config Disk", NULL, ATA_HORKAGE_DISABLE },
3919 /* Weird ATAPI devices */
3920 { "TORiSAN DVD-ROM DRD-N216", NULL, ATA_HORKAGE_MAX_SEC_128 },
3921 { "QUANTUM DAT DAT72-000", NULL, ATA_HORKAGE_ATAPI_MOD16_DMA },
3922 { "Slimtype DVD A DS8A8SH", NULL, ATA_HORKAGE_MAX_SEC_LBA48 },
3923 { "Slimtype DVD A DS8A9SH", NULL, ATA_HORKAGE_MAX_SEC_LBA48 },
3926 * Causes silent data corruption with higher max sects.
3927 * http://lkml.kernel.org/g/x49wpy40ysk.fsf@segfault.boston.devel.redhat.com
3929 { "ST380013AS", "3.20", ATA_HORKAGE_MAX_SEC_1024 },
3932 * These devices time out with higher max sects.
3933 * https://bugzilla.kernel.org/show_bug.cgi?id=121671
3935 { "LITEON CX1-JB*-HP", NULL, ATA_HORKAGE_MAX_SEC_1024 },
3936 { "LITEON EP1-*", NULL, ATA_HORKAGE_MAX_SEC_1024 },
3938 /* Devices we expect to fail diagnostics */
3940 /* Devices where NCQ should be avoided */
3942 { "WDC WD740ADFD-00", NULL, ATA_HORKAGE_NONCQ },
3943 { "WDC WD740ADFD-00NLR1", NULL, ATA_HORKAGE_NONCQ, },
3944 /* http://thread.gmane.org/gmane.linux.ide/14907 */
3945 { "FUJITSU MHT2060BH", NULL, ATA_HORKAGE_NONCQ },
3947 { "Maxtor *", "BANC*", ATA_HORKAGE_NONCQ },
3948 { "Maxtor 7V300F0", "VA111630", ATA_HORKAGE_NONCQ },
3949 { "ST380817AS", "3.42", ATA_HORKAGE_NONCQ },
3950 { "ST3160023AS", "3.42", ATA_HORKAGE_NONCQ },
3951 { "OCZ CORE_SSD", "02.10104", ATA_HORKAGE_NONCQ },
3953 /* Seagate NCQ + FLUSH CACHE firmware bug */
3954 { "ST31500341AS", "SD1[5-9]", ATA_HORKAGE_NONCQ |
3955 ATA_HORKAGE_FIRMWARE_WARN },
3957 { "ST31000333AS", "SD1[5-9]", ATA_HORKAGE_NONCQ |
3958 ATA_HORKAGE_FIRMWARE_WARN },
3960 { "ST3640[36]23AS", "SD1[5-9]", ATA_HORKAGE_NONCQ |
3961 ATA_HORKAGE_FIRMWARE_WARN },
3963 { "ST3320[68]13AS", "SD1[5-9]", ATA_HORKAGE_NONCQ |
3964 ATA_HORKAGE_FIRMWARE_WARN },
3966 /* drives which fail FPDMA_AA activation (some may freeze afterwards)
3967 the ST disks also have LPM issues */
3968 { "ST1000LM024 HN-M101MBB", NULL, ATA_HORKAGE_BROKEN_FPDMA_AA |
3969 ATA_HORKAGE_NOLPM, },
3970 { "VB0250EAVER", "HPG7", ATA_HORKAGE_BROKEN_FPDMA_AA },
3972 /* Blacklist entries taken from Silicon Image 3124/3132
3973 Windows driver .inf file - also several Linux problem reports */
3974 { "HTS541060G9SA00", "MB3OC60D", ATA_HORKAGE_NONCQ, },
3975 { "HTS541080G9SA00", "MB4OC60D", ATA_HORKAGE_NONCQ, },
3976 { "HTS541010G9SA00", "MBZOC60D", ATA_HORKAGE_NONCQ, },
3978 /* https://bugzilla.kernel.org/show_bug.cgi?id=15573 */
3979 { "C300-CTFDDAC128MAG", "0001", ATA_HORKAGE_NONCQ, },
3981 /* Sandisk SD7/8/9s lock up hard on large trims */
3982 { "SanDisk SD[789]*", NULL, ATA_HORKAGE_MAX_TRIM_128M, },
3984 /* devices which puke on READ_NATIVE_MAX */
3985 { "HDS724040KLSA80", "KFAOA20N", ATA_HORKAGE_BROKEN_HPA, },
3986 { "WDC WD3200JD-00KLB0", "WD-WCAMR1130137", ATA_HORKAGE_BROKEN_HPA },
3987 { "WDC WD2500JD-00HBB0", "WD-WMAL71490727", ATA_HORKAGE_BROKEN_HPA },
3988 { "MAXTOR 6L080L4", "A93.0500", ATA_HORKAGE_BROKEN_HPA },
3990 /* this one allows HPA unlocking but fails IOs on the area */
3991 { "OCZ-VERTEX", "1.30", ATA_HORKAGE_BROKEN_HPA },
3993 /* Devices which report 1 sector over size HPA */
3994 { "ST340823A", NULL, ATA_HORKAGE_HPA_SIZE, },
3995 { "ST320413A", NULL, ATA_HORKAGE_HPA_SIZE, },
3996 { "ST310211A", NULL, ATA_HORKAGE_HPA_SIZE, },
3998 /* Devices which get the IVB wrong */
3999 { "QUANTUM FIREBALLlct10 05", "A03.0900", ATA_HORKAGE_IVB, },
4000 /* Maybe we should just blacklist TSSTcorp... */
4001 { "TSSTcorp CDDVDW SH-S202[HJN]", "SB0[01]", ATA_HORKAGE_IVB, },
4003 /* Devices that do not need bridging limits applied */
4004 { "MTRON MSP-SATA*", NULL, ATA_HORKAGE_BRIDGE_OK, },
4005 { "BUFFALO HD-QSU2/R5", NULL, ATA_HORKAGE_BRIDGE_OK, },
4007 /* Devices which aren't very happy with higher link speeds */
4008 { "WD My Book", NULL, ATA_HORKAGE_1_5_GBPS, },
4009 { "Seagate FreeAgent GoFlex", NULL, ATA_HORKAGE_1_5_GBPS, },
4012 * Devices which choke on SETXFER. Applies only if both the
4013 * device and controller are SATA.
4015 { "PIONEER DVD-RW DVRTD08", NULL, ATA_HORKAGE_NOSETXFER },
4016 { "PIONEER DVD-RW DVRTD08A", NULL, ATA_HORKAGE_NOSETXFER },
4017 { "PIONEER DVD-RW DVR-215", NULL, ATA_HORKAGE_NOSETXFER },
4018 { "PIONEER DVD-RW DVR-212D", NULL, ATA_HORKAGE_NOSETXFER },
4019 { "PIONEER DVD-RW DVR-216D", NULL, ATA_HORKAGE_NOSETXFER },
4021 /* Crucial BX100 SSD 500GB has broken LPM support */
4022 { "CT500BX100SSD1", NULL, ATA_HORKAGE_NOLPM },
4024 /* 512GB MX100 with MU01 firmware has both queued TRIM and LPM issues */
4025 { "Crucial_CT512MX100*", "MU01", ATA_HORKAGE_NO_NCQ_TRIM |
4026 ATA_HORKAGE_ZERO_AFTER_TRIM |
4027 ATA_HORKAGE_NOLPM, },
4028 /* 512GB MX100 with newer firmware has only LPM issues */
4029 { "Crucial_CT512MX100*", NULL, ATA_HORKAGE_ZERO_AFTER_TRIM |
4030 ATA_HORKAGE_NOLPM, },
4032 /* 480GB+ M500 SSDs have both queued TRIM and LPM issues */
4033 { "Crucial_CT480M500*", NULL, ATA_HORKAGE_NO_NCQ_TRIM |
4034 ATA_HORKAGE_ZERO_AFTER_TRIM |
4035 ATA_HORKAGE_NOLPM, },
4036 { "Crucial_CT960M500*", NULL, ATA_HORKAGE_NO_NCQ_TRIM |
4037 ATA_HORKAGE_ZERO_AFTER_TRIM |
4038 ATA_HORKAGE_NOLPM, },
4040 /* These specific Samsung models/firmware-revs do not handle LPM well */
4041 { "SAMSUNG MZMPC128HBFU-000MV", "CXM14M1Q", ATA_HORKAGE_NOLPM, },
4042 { "SAMSUNG SSD PM830 mSATA *", "CXM13D1Q", ATA_HORKAGE_NOLPM, },
4043 { "SAMSUNG MZ7TD256HAFV-000L9", NULL, ATA_HORKAGE_NOLPM, },
4044 { "SAMSUNG MZ7TE512HMHP-000L1", "EXT06L0Q", ATA_HORKAGE_NOLPM, },
4046 /* devices that don't properly handle queued TRIM commands */
4047 { "Micron_M500IT_*", "MU01", ATA_HORKAGE_NO_NCQ_TRIM |
4048 ATA_HORKAGE_ZERO_AFTER_TRIM, },
4049 { "Micron_M500_*", NULL, ATA_HORKAGE_NO_NCQ_TRIM |
4050 ATA_HORKAGE_ZERO_AFTER_TRIM, },
4051 { "Crucial_CT*M500*", NULL, ATA_HORKAGE_NO_NCQ_TRIM |
4052 ATA_HORKAGE_ZERO_AFTER_TRIM, },
4053 { "Micron_M5[15]0_*", "MU01", ATA_HORKAGE_NO_NCQ_TRIM |
4054 ATA_HORKAGE_ZERO_AFTER_TRIM, },
4055 { "Crucial_CT*M550*", "MU01", ATA_HORKAGE_NO_NCQ_TRIM |
4056 ATA_HORKAGE_ZERO_AFTER_TRIM, },
4057 { "Crucial_CT*MX100*", "MU01", ATA_HORKAGE_NO_NCQ_TRIM |
4058 ATA_HORKAGE_ZERO_AFTER_TRIM, },
4059 { "Samsung SSD 840*", NULL, ATA_HORKAGE_NO_NCQ_TRIM |
4060 ATA_HORKAGE_ZERO_AFTER_TRIM, },
4061 { "Samsung SSD 850*", NULL, ATA_HORKAGE_NO_NCQ_TRIM |
4062 ATA_HORKAGE_ZERO_AFTER_TRIM, },
4063 { "Samsung SSD 860*", NULL, ATA_HORKAGE_NO_NCQ_TRIM |
4064 ATA_HORKAGE_ZERO_AFTER_TRIM |
4065 ATA_HORKAGE_NO_NCQ_ON_ATI, },
4066 { "Samsung SSD 870*", NULL, ATA_HORKAGE_NO_NCQ_TRIM |
4067 ATA_HORKAGE_ZERO_AFTER_TRIM |
4068 ATA_HORKAGE_NO_NCQ_ON_ATI, },
4069 { "FCCT*M500*", NULL, ATA_HORKAGE_NO_NCQ_TRIM |
4070 ATA_HORKAGE_ZERO_AFTER_TRIM, },
4072 /* devices that don't properly handle TRIM commands */
4073 { "SuperSSpeed S238*", NULL, ATA_HORKAGE_NOTRIM, },
4076 * As defined, the DRAT (Deterministic Read After Trim) and RZAT
4077 * (Return Zero After Trim) flags in the ATA Command Set are
4078 * unreliable in the sense that they only define what happens if
4079 * the device successfully executed the DSM TRIM command. TRIM
4080 * is only advisory, however, and the device is free to silently
4081 * ignore all or parts of the request.
4083 * Whitelist drives that are known to reliably return zeroes
4088 * The intel 510 drive has buggy DRAT/RZAT. Explicitly exclude
4089 * that model before whitelisting all other intel SSDs.
4091 { "INTEL*SSDSC2MH*", NULL, 0, },
4093 { "Micron*", NULL, ATA_HORKAGE_ZERO_AFTER_TRIM, },
4094 { "Crucial*", NULL, ATA_HORKAGE_ZERO_AFTER_TRIM, },
4095 { "INTEL*SSD*", NULL, ATA_HORKAGE_ZERO_AFTER_TRIM, },
4096 { "SSD*INTEL*", NULL, ATA_HORKAGE_ZERO_AFTER_TRIM, },
4097 { "Samsung*SSD*", NULL, ATA_HORKAGE_ZERO_AFTER_TRIM, },
4098 { "SAMSUNG*SSD*", NULL, ATA_HORKAGE_ZERO_AFTER_TRIM, },
4099 { "SAMSUNG*MZ7KM*", NULL, ATA_HORKAGE_ZERO_AFTER_TRIM, },
4100 { "ST[1248][0248]0[FH]*", NULL, ATA_HORKAGE_ZERO_AFTER_TRIM, },
4103 * Some WD SATA-I drives spin up and down erratically when the link
4104 * is put into the slumber mode. We don't have full list of the
4105 * affected devices. Disable LPM if the device matches one of the
4106 * known prefixes and is SATA-1. As a side effect LPM partial is
4109 * https://bugzilla.kernel.org/show_bug.cgi?id=57211
4111 { "WDC WD800JD-*", NULL, ATA_HORKAGE_WD_BROKEN_LPM },
4112 { "WDC WD1200JD-*", NULL, ATA_HORKAGE_WD_BROKEN_LPM },
4113 { "WDC WD1600JD-*", NULL, ATA_HORKAGE_WD_BROKEN_LPM },
4114 { "WDC WD2000JD-*", NULL, ATA_HORKAGE_WD_BROKEN_LPM },
4115 { "WDC WD2500JD-*", NULL, ATA_HORKAGE_WD_BROKEN_LPM },
4116 { "WDC WD3000JD-*", NULL, ATA_HORKAGE_WD_BROKEN_LPM },
4117 { "WDC WD3200JD-*", NULL, ATA_HORKAGE_WD_BROKEN_LPM },
4123 static unsigned long ata_dev_blacklisted(const struct ata_device *dev)
4125 unsigned char model_num[ATA_ID_PROD_LEN + 1];
4126 unsigned char model_rev[ATA_ID_FW_REV_LEN + 1];
4127 const struct ata_blacklist_entry *ad = ata_device_blacklist;
4129 ata_id_c_string(dev->id, model_num, ATA_ID_PROD, sizeof(model_num));
4130 ata_id_c_string(dev->id, model_rev, ATA_ID_FW_REV, sizeof(model_rev));
4132 while (ad->model_num) {
4133 if (glob_match(ad->model_num, model_num)) {
4134 if (ad->model_rev == NULL)
4136 if (glob_match(ad->model_rev, model_rev))
4144 static int ata_dma_blacklisted(const struct ata_device *dev)
4146 /* We don't support polling DMA.
4147 * DMA blacklist those ATAPI devices with CDB-intr (and use PIO)
4148 * if the LLDD handles only interrupts in the HSM_ST_LAST state.
4150 if ((dev->link->ap->flags & ATA_FLAG_PIO_POLLING) &&
4151 (dev->flags & ATA_DFLAG_CDB_INTR))
4153 return (dev->horkage & ATA_HORKAGE_NODMA) ? 1 : 0;
4157 * ata_is_40wire - check drive side detection
4160 * Perform drive side detection decoding, allowing for device vendors
4161 * who can't follow the documentation.
4164 static int ata_is_40wire(struct ata_device *dev)
4166 if (dev->horkage & ATA_HORKAGE_IVB)
4167 return ata_drive_40wire_relaxed(dev->id);
4168 return ata_drive_40wire(dev->id);
4172 * cable_is_40wire - 40/80/SATA decider
4173 * @ap: port to consider
4175 * This function encapsulates the policy for speed management
4176 * in one place. At the moment we don't cache the result but
4177 * there is a good case for setting ap->cbl to the result when
4178 * we are called with unknown cables (and figuring out if it
4179 * impacts hotplug at all).
4181 * Return 1 if the cable appears to be 40 wire.
4184 static int cable_is_40wire(struct ata_port *ap)
4186 struct ata_link *link;
4187 struct ata_device *dev;
4189 /* If the controller thinks we are 40 wire, we are. */
4190 if (ap->cbl == ATA_CBL_PATA40)
4193 /* If the controller thinks we are 80 wire, we are. */
4194 if (ap->cbl == ATA_CBL_PATA80 || ap->cbl == ATA_CBL_SATA)
4197 /* If the system is known to be 40 wire short cable (eg
4198 * laptop), then we allow 80 wire modes even if the drive
4201 if (ap->cbl == ATA_CBL_PATA40_SHORT)
4204 /* If the controller doesn't know, we scan.
4206 * Note: We look for all 40 wire detects at this point. Any
4207 * 80 wire detect is taken to be 80 wire cable because
4208 * - in many setups only the one drive (slave if present) will
4209 * give a valid detect
4210 * - if you have a non detect capable drive you don't want it
4211 * to colour the choice
4213 ata_for_each_link(link, ap, EDGE) {
4214 ata_for_each_dev(dev, link, ENABLED) {
4215 if (!ata_is_40wire(dev))
4223 * ata_dev_xfermask - Compute supported xfermask of the given device
4224 * @dev: Device to compute xfermask for
4226 * Compute supported xfermask of @dev and store it in
4227 * dev->*_mask. This function is responsible for applying all
4228 * known limits including host controller limits, device
4234 static void ata_dev_xfermask(struct ata_device *dev)
4236 struct ata_link *link = dev->link;
4237 struct ata_port *ap = link->ap;
4238 struct ata_host *host = ap->host;
4239 unsigned long xfer_mask;
4241 /* controller modes available */
4242 xfer_mask = ata_pack_xfermask(ap->pio_mask,
4243 ap->mwdma_mask, ap->udma_mask);
4245 /* drive modes available */
4246 xfer_mask &= ata_pack_xfermask(dev->pio_mask,
4247 dev->mwdma_mask, dev->udma_mask);
4248 xfer_mask &= ata_id_xfermask(dev->id);
4251 * CFA Advanced TrueIDE timings are not allowed on a shared
4254 if (ata_dev_pair(dev)) {
4255 /* No PIO5 or PIO6 */
4256 xfer_mask &= ~(0x03 << (ATA_SHIFT_PIO + 5));
4257 /* No MWDMA3 or MWDMA 4 */
4258 xfer_mask &= ~(0x03 << (ATA_SHIFT_MWDMA + 3));
4261 if (ata_dma_blacklisted(dev)) {
4262 xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA);
4264 "device is on DMA blacklist, disabling DMA\n");
4267 if ((host->flags & ATA_HOST_SIMPLEX) &&
4268 host->simplex_claimed && host->simplex_claimed != ap) {
4269 xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA);
4271 "simplex DMA is claimed by other device, disabling DMA\n");
4274 if (ap->flags & ATA_FLAG_NO_IORDY)
4275 xfer_mask &= ata_pio_mask_no_iordy(dev);
4277 if (ap->ops->mode_filter)
4278 xfer_mask = ap->ops->mode_filter(dev, xfer_mask);
4280 /* Apply cable rule here. Don't apply it early because when
4281 * we handle hot plug the cable type can itself change.
4282 * Check this last so that we know if the transfer rate was
4283 * solely limited by the cable.
4284 * Unknown or 80 wire cables reported host side are checked
4285 * drive side as well. Cases where we know a 40wire cable
4286 * is used safely for 80 are not checked here.
4288 if (xfer_mask & (0xF8 << ATA_SHIFT_UDMA))
4289 /* UDMA/44 or higher would be available */
4290 if (cable_is_40wire(ap)) {
4292 "limited to UDMA/33 due to 40-wire cable\n");
4293 xfer_mask &= ~(0xF8 << ATA_SHIFT_UDMA);
4296 ata_unpack_xfermask(xfer_mask, &dev->pio_mask,
4297 &dev->mwdma_mask, &dev->udma_mask);
4301 * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command
4302 * @dev: Device to which command will be sent
4304 * Issue SET FEATURES - XFER MODE command to device @dev
4308 * PCI/etc. bus probe sem.
4311 * 0 on success, AC_ERR_* mask otherwise.
4314 static unsigned int ata_dev_set_xfermode(struct ata_device *dev)
4316 struct ata_taskfile tf;
4317 unsigned int err_mask;
4319 /* set up set-features taskfile */
4320 DPRINTK("set features - xfer mode\n");
4322 /* Some controllers and ATAPI devices show flaky interrupt
4323 * behavior after setting xfer mode. Use polling instead.
4325 ata_tf_init(dev, &tf);
4326 tf.command = ATA_CMD_SET_FEATURES;
4327 tf.feature = SETFEATURES_XFER;
4328 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_POLLING;
4329 tf.protocol = ATA_PROT_NODATA;
4330 /* If we are using IORDY we must send the mode setting command */
4331 if (ata_pio_need_iordy(dev))
4332 tf.nsect = dev->xfer_mode;
4333 /* If the device has IORDY and the controller does not - turn it off */
4334 else if (ata_id_has_iordy(dev->id))
4336 else /* In the ancient relic department - skip all of this */
4339 /* On some disks, this command causes spin-up, so we need longer timeout */
4340 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 15000);
4342 DPRINTK("EXIT, err_mask=%x\n", err_mask);
4347 * ata_dev_set_feature - Issue SET FEATURES - SATA FEATURES
4348 * @dev: Device to which command will be sent
4349 * @enable: Whether to enable or disable the feature
4350 * @feature: The sector count represents the feature to set
4352 * Issue SET FEATURES - SATA FEATURES command to device @dev
4353 * on port @ap with sector count
4356 * PCI/etc. bus probe sem.
4359 * 0 on success, AC_ERR_* mask otherwise.
4361 unsigned int ata_dev_set_feature(struct ata_device *dev, u8 enable, u8 feature)
4363 struct ata_taskfile tf;
4364 unsigned int err_mask;
4365 unsigned long timeout = 0;
4367 /* set up set-features taskfile */
4368 DPRINTK("set features - SATA features\n");
4370 ata_tf_init(dev, &tf);
4371 tf.command = ATA_CMD_SET_FEATURES;
4372 tf.feature = enable;
4373 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
4374 tf.protocol = ATA_PROT_NODATA;
4377 if (enable == SETFEATURES_SPINUP)
4378 timeout = ata_probe_timeout ?
4379 ata_probe_timeout * 1000 : SETFEATURES_SPINUP_TIMEOUT;
4380 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, timeout);
4382 DPRINTK("EXIT, err_mask=%x\n", err_mask);
4385 EXPORT_SYMBOL_GPL(ata_dev_set_feature);
4388 * ata_dev_init_params - Issue INIT DEV PARAMS command
4389 * @dev: Device to which command will be sent
4390 * @heads: Number of heads (taskfile parameter)
4391 * @sectors: Number of sectors (taskfile parameter)
4394 * Kernel thread context (may sleep)
4397 * 0 on success, AC_ERR_* mask otherwise.
4399 static unsigned int ata_dev_init_params(struct ata_device *dev,
4400 u16 heads, u16 sectors)
4402 struct ata_taskfile tf;
4403 unsigned int err_mask;
4405 /* Number of sectors per track 1-255. Number of heads 1-16 */
4406 if (sectors < 1 || sectors > 255 || heads < 1 || heads > 16)
4407 return AC_ERR_INVALID;
4409 /* set up init dev params taskfile */
4410 DPRINTK("init dev params \n");
4412 ata_tf_init(dev, &tf);
4413 tf.command = ATA_CMD_INIT_DEV_PARAMS;
4414 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
4415 tf.protocol = ATA_PROT_NODATA;
4417 tf.device |= (heads - 1) & 0x0f; /* max head = num. of heads - 1 */
4419 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
4420 /* A clean abort indicates an original or just out of spec drive
4421 and we should continue as we issue the setup based on the
4422 drive reported working geometry */
4423 if (err_mask == AC_ERR_DEV && (tf.feature & ATA_ABORTED))
4426 DPRINTK("EXIT, err_mask=%x\n", err_mask);
4431 * atapi_check_dma - Check whether ATAPI DMA can be supported
4432 * @qc: Metadata associated with taskfile to check
4434 * Allow low-level driver to filter ATA PACKET commands, returning
4435 * a status indicating whether or not it is OK to use DMA for the
4436 * supplied PACKET command.
4439 * spin_lock_irqsave(host lock)
4441 * RETURNS: 0 when ATAPI DMA can be used
4444 int atapi_check_dma(struct ata_queued_cmd *qc)
4446 struct ata_port *ap = qc->ap;
4448 /* Don't allow DMA if it isn't multiple of 16 bytes. Quite a
4449 * few ATAPI devices choke on such DMA requests.
4451 if (!(qc->dev->horkage & ATA_HORKAGE_ATAPI_MOD16_DMA) &&
4452 unlikely(qc->nbytes & 15))
4455 if (ap->ops->check_atapi_dma)
4456 return ap->ops->check_atapi_dma(qc);
4462 * ata_std_qc_defer - Check whether a qc needs to be deferred
4463 * @qc: ATA command in question
4465 * Non-NCQ commands cannot run with any other command, NCQ or
4466 * not. As upper layer only knows the queue depth, we are
4467 * responsible for maintaining exclusion. This function checks
4468 * whether a new command @qc can be issued.
4471 * spin_lock_irqsave(host lock)
4474 * ATA_DEFER_* if deferring is needed, 0 otherwise.
4476 int ata_std_qc_defer(struct ata_queued_cmd *qc)
4478 struct ata_link *link = qc->dev->link;
4480 if (ata_is_ncq(qc->tf.protocol)) {
4481 if (!ata_tag_valid(link->active_tag))
4484 if (!ata_tag_valid(link->active_tag) && !link->sactive)
4488 return ATA_DEFER_LINK;
4490 EXPORT_SYMBOL_GPL(ata_std_qc_defer);
4492 enum ata_completion_errors ata_noop_qc_prep(struct ata_queued_cmd *qc)
4496 EXPORT_SYMBOL_GPL(ata_noop_qc_prep);
4499 * ata_sg_init - Associate command with scatter-gather table.
4500 * @qc: Command to be associated
4501 * @sg: Scatter-gather table.
4502 * @n_elem: Number of elements in s/g table.
4504 * Initialize the data-related elements of queued_cmd @qc
4505 * to point to a scatter-gather table @sg, containing @n_elem
4509 * spin_lock_irqsave(host lock)
4511 void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
4512 unsigned int n_elem)
4515 qc->n_elem = n_elem;
4519 #ifdef CONFIG_HAS_DMA
4522 * ata_sg_clean - Unmap DMA memory associated with command
4523 * @qc: Command containing DMA memory to be released
4525 * Unmap all mapped DMA memory associated with this command.
4528 * spin_lock_irqsave(host lock)
4530 static void ata_sg_clean(struct ata_queued_cmd *qc)
4532 struct ata_port *ap = qc->ap;
4533 struct scatterlist *sg = qc->sg;
4534 int dir = qc->dma_dir;
4536 WARN_ON_ONCE(sg == NULL);
4538 VPRINTK("unmapping %u sg elements\n", qc->n_elem);
4541 dma_unmap_sg(ap->dev, sg, qc->orig_n_elem, dir);
4543 qc->flags &= ~ATA_QCFLAG_DMAMAP;
4548 * ata_sg_setup - DMA-map the scatter-gather table associated with a command.
4549 * @qc: Command with scatter-gather table to be mapped.
4551 * DMA-map the scatter-gather table associated with queued_cmd @qc.
4554 * spin_lock_irqsave(host lock)
4557 * Zero on success, negative on error.
4560 static int ata_sg_setup(struct ata_queued_cmd *qc)
4562 struct ata_port *ap = qc->ap;
4563 unsigned int n_elem;
4565 VPRINTK("ENTER, ata%u\n", ap->print_id);
4567 n_elem = dma_map_sg(ap->dev, qc->sg, qc->n_elem, qc->dma_dir);
4571 VPRINTK("%d sg elements mapped\n", n_elem);
4572 qc->orig_n_elem = qc->n_elem;
4573 qc->n_elem = n_elem;
4574 qc->flags |= ATA_QCFLAG_DMAMAP;
4579 #else /* !CONFIG_HAS_DMA */
4581 static inline void ata_sg_clean(struct ata_queued_cmd *qc) {}
4582 static inline int ata_sg_setup(struct ata_queued_cmd *qc) { return -1; }
4584 #endif /* !CONFIG_HAS_DMA */
4587 * swap_buf_le16 - swap halves of 16-bit words in place
4588 * @buf: Buffer to swap
4589 * @buf_words: Number of 16-bit words in buffer.
4591 * Swap halves of 16-bit words if needed to convert from
4592 * little-endian byte order to native cpu byte order, or
4596 * Inherited from caller.
4598 void swap_buf_le16(u16 *buf, unsigned int buf_words)
4603 for (i = 0; i < buf_words; i++)
4604 buf[i] = le16_to_cpu(buf[i]);
4605 #endif /* __BIG_ENDIAN */
4609 * ata_qc_new_init - Request an available ATA command, and initialize it
4610 * @dev: Device from whom we request an available command structure
4617 struct ata_queued_cmd *ata_qc_new_init(struct ata_device *dev, int tag)
4619 struct ata_port *ap = dev->link->ap;
4620 struct ata_queued_cmd *qc;
4622 /* no command while frozen */
4623 if (unlikely(ap->pflags & ATA_PFLAG_FROZEN))
4627 if (ap->flags & ATA_FLAG_SAS_HOST) {
4628 tag = ata_sas_allocate_tag(ap);
4633 qc = __ata_qc_from_tag(ap, tag);
4634 qc->tag = qc->hw_tag = tag;
4645 * ata_qc_free - free unused ata_queued_cmd
4646 * @qc: Command to complete
4648 * Designed to free unused ata_queued_cmd object
4649 * in case something prevents using it.
4652 * spin_lock_irqsave(host lock)
4654 void ata_qc_free(struct ata_queued_cmd *qc)
4656 struct ata_port *ap;
4659 WARN_ON_ONCE(qc == NULL); /* ata_qc_from_tag _might_ return NULL */
4664 if (ata_tag_valid(tag)) {
4665 qc->tag = ATA_TAG_POISON;
4666 if (ap->flags & ATA_FLAG_SAS_HOST)
4667 ata_sas_free_tag(tag, ap);
4671 void __ata_qc_complete(struct ata_queued_cmd *qc)
4673 struct ata_port *ap;
4674 struct ata_link *link;
4676 WARN_ON_ONCE(qc == NULL); /* ata_qc_from_tag _might_ return NULL */
4677 WARN_ON_ONCE(!(qc->flags & ATA_QCFLAG_ACTIVE));
4679 link = qc->dev->link;
4681 if (likely(qc->flags & ATA_QCFLAG_DMAMAP))
4684 /* command should be marked inactive atomically with qc completion */
4685 if (ata_is_ncq(qc->tf.protocol)) {
4686 link->sactive &= ~(1 << qc->hw_tag);
4688 ap->nr_active_links--;
4690 link->active_tag = ATA_TAG_POISON;
4691 ap->nr_active_links--;
4694 /* clear exclusive status */
4695 if (unlikely(qc->flags & ATA_QCFLAG_CLEAR_EXCL &&
4696 ap->excl_link == link))
4697 ap->excl_link = NULL;
4699 /* atapi: mark qc as inactive to prevent the interrupt handler
4700 * from completing the command twice later, before the error handler
4701 * is called. (when rc != 0 and atapi request sense is needed)
4703 qc->flags &= ~ATA_QCFLAG_ACTIVE;
4704 ap->qc_active &= ~(1ULL << qc->tag);
4706 /* call completion callback */
4707 qc->complete_fn(qc);
4710 static void fill_result_tf(struct ata_queued_cmd *qc)
4712 struct ata_port *ap = qc->ap;
4714 qc->result_tf.flags = qc->tf.flags;
4715 ap->ops->qc_fill_rtf(qc);
4718 static void ata_verify_xfer(struct ata_queued_cmd *qc)
4720 struct ata_device *dev = qc->dev;
4722 if (!ata_is_data(qc->tf.protocol))
4725 if ((dev->mwdma_mask || dev->udma_mask) && ata_is_pio(qc->tf.protocol))
4728 dev->flags &= ~ATA_DFLAG_DUBIOUS_XFER;
4732 * ata_qc_complete - Complete an active ATA command
4733 * @qc: Command to complete
4735 * Indicate to the mid and upper layers that an ATA command has
4736 * completed, with either an ok or not-ok status.
4738 * Refrain from calling this function multiple times when
4739 * successfully completing multiple NCQ commands.
4740 * ata_qc_complete_multiple() should be used instead, which will
4741 * properly update IRQ expect state.
4744 * spin_lock_irqsave(host lock)
4746 void ata_qc_complete(struct ata_queued_cmd *qc)
4748 struct ata_port *ap = qc->ap;
4750 /* Trigger the LED (if available) */
4751 ledtrig_disk_activity(!!(qc->tf.flags & ATA_TFLAG_WRITE));
4753 /* XXX: New EH and old EH use different mechanisms to
4754 * synchronize EH with regular execution path.
4756 * In new EH, a failed qc is marked with ATA_QCFLAG_FAILED.
4757 * Normal execution path is responsible for not accessing a
4758 * failed qc. libata core enforces the rule by returning NULL
4759 * from ata_qc_from_tag() for failed qcs.
4761 * Old EH depends on ata_qc_complete() nullifying completion
4762 * requests if ATA_QCFLAG_EH_SCHEDULED is set. Old EH does
4763 * not synchronize with interrupt handler. Only PIO task is
4766 if (ap->ops->error_handler) {
4767 struct ata_device *dev = qc->dev;
4768 struct ata_eh_info *ehi = &dev->link->eh_info;
4770 if (unlikely(qc->err_mask))
4771 qc->flags |= ATA_QCFLAG_FAILED;
4774 * Finish internal commands without any further processing
4775 * and always with the result TF filled.
4777 if (unlikely(ata_tag_internal(qc->tag))) {
4779 trace_ata_qc_complete_internal(qc);
4780 __ata_qc_complete(qc);
4785 * Non-internal qc has failed. Fill the result TF and
4788 if (unlikely(qc->flags & ATA_QCFLAG_FAILED)) {
4790 trace_ata_qc_complete_failed(qc);
4791 ata_qc_schedule_eh(qc);
4795 WARN_ON_ONCE(ap->pflags & ATA_PFLAG_FROZEN);
4797 /* read result TF if requested */
4798 if (qc->flags & ATA_QCFLAG_RESULT_TF)
4801 trace_ata_qc_complete_done(qc);
4802 /* Some commands need post-processing after successful
4805 switch (qc->tf.command) {
4806 case ATA_CMD_SET_FEATURES:
4807 if (qc->tf.feature != SETFEATURES_WC_ON &&
4808 qc->tf.feature != SETFEATURES_WC_OFF &&
4809 qc->tf.feature != SETFEATURES_RA_ON &&
4810 qc->tf.feature != SETFEATURES_RA_OFF)
4813 case ATA_CMD_INIT_DEV_PARAMS: /* CHS translation changed */
4814 case ATA_CMD_SET_MULTI: /* multi_count changed */
4815 /* revalidate device */
4816 ehi->dev_action[dev->devno] |= ATA_EH_REVALIDATE;
4817 ata_port_schedule_eh(ap);
4821 dev->flags |= ATA_DFLAG_SLEEPING;
4825 if (unlikely(dev->flags & ATA_DFLAG_DUBIOUS_XFER))
4826 ata_verify_xfer(qc);
4828 __ata_qc_complete(qc);
4830 if (qc->flags & ATA_QCFLAG_EH_SCHEDULED)
4833 /* read result TF if failed or requested */
4834 if (qc->err_mask || qc->flags & ATA_QCFLAG_RESULT_TF)
4837 __ata_qc_complete(qc);
4840 EXPORT_SYMBOL_GPL(ata_qc_complete);
4843 * ata_qc_get_active - get bitmask of active qcs
4844 * @ap: port in question
4847 * spin_lock_irqsave(host lock)
4850 * Bitmask of active qcs
4852 u64 ata_qc_get_active(struct ata_port *ap)
4854 u64 qc_active = ap->qc_active;
4856 /* ATA_TAG_INTERNAL is sent to hw as tag 0 */
4857 if (qc_active & (1ULL << ATA_TAG_INTERNAL)) {
4858 qc_active |= (1 << 0);
4859 qc_active &= ~(1ULL << ATA_TAG_INTERNAL);
4864 EXPORT_SYMBOL_GPL(ata_qc_get_active);
4867 * ata_qc_issue - issue taskfile to device
4868 * @qc: command to issue to device
4870 * Prepare an ATA command to submission to device.
4871 * This includes mapping the data into a DMA-able
4872 * area, filling in the S/G table, and finally
4873 * writing the taskfile to hardware, starting the command.
4876 * spin_lock_irqsave(host lock)
4878 void ata_qc_issue(struct ata_queued_cmd *qc)
4880 struct ata_port *ap = qc->ap;
4881 struct ata_link *link = qc->dev->link;
4882 u8 prot = qc->tf.protocol;
4884 /* Make sure only one non-NCQ command is outstanding. The
4885 * check is skipped for old EH because it reuses active qc to
4886 * request ATAPI sense.
4888 WARN_ON_ONCE(ap->ops->error_handler && ata_tag_valid(link->active_tag));
4890 if (ata_is_ncq(prot)) {
4891 WARN_ON_ONCE(link->sactive & (1 << qc->hw_tag));
4894 ap->nr_active_links++;
4895 link->sactive |= 1 << qc->hw_tag;
4897 WARN_ON_ONCE(link->sactive);
4899 ap->nr_active_links++;
4900 link->active_tag = qc->tag;
4903 qc->flags |= ATA_QCFLAG_ACTIVE;
4904 ap->qc_active |= 1ULL << qc->tag;
4907 * We guarantee to LLDs that they will have at least one
4908 * non-zero sg if the command is a data command.
4910 if (ata_is_data(prot) && (!qc->sg || !qc->n_elem || !qc->nbytes))
4913 if (ata_is_dma(prot) || (ata_is_pio(prot) &&
4914 (ap->flags & ATA_FLAG_PIO_DMA)))
4915 if (ata_sg_setup(qc))
4918 /* if device is sleeping, schedule reset and abort the link */
4919 if (unlikely(qc->dev->flags & ATA_DFLAG_SLEEPING)) {
4920 link->eh_info.action |= ATA_EH_RESET;
4921 ata_ehi_push_desc(&link->eh_info, "waking up from sleep");
4922 ata_link_abort(link);
4926 qc->err_mask |= ap->ops->qc_prep(qc);
4927 if (unlikely(qc->err_mask))
4929 trace_ata_qc_issue(qc);
4930 qc->err_mask |= ap->ops->qc_issue(qc);
4931 if (unlikely(qc->err_mask))
4936 qc->err_mask |= AC_ERR_SYSTEM;
4938 ata_qc_complete(qc);
4942 * ata_phys_link_online - test whether the given link is online
4943 * @link: ATA link to test
4945 * Test whether @link is online. Note that this function returns
4946 * 0 if online status of @link cannot be obtained, so
4947 * ata_link_online(link) != !ata_link_offline(link).
4953 * True if the port online status is available and online.
4955 bool ata_phys_link_online(struct ata_link *link)
4959 if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0 &&
4960 ata_sstatus_online(sstatus))
4966 * ata_phys_link_offline - test whether the given link is offline
4967 * @link: ATA link to test
4969 * Test whether @link is offline. Note that this function
4970 * returns 0 if offline status of @link cannot be obtained, so
4971 * ata_link_online(link) != !ata_link_offline(link).
4977 * True if the port offline status is available and offline.
4979 bool ata_phys_link_offline(struct ata_link *link)
4983 if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0 &&
4984 !ata_sstatus_online(sstatus))
4990 * ata_link_online - test whether the given link is online
4991 * @link: ATA link to test
4993 * Test whether @link is online. This is identical to
4994 * ata_phys_link_online() when there's no slave link. When
4995 * there's a slave link, this function should only be called on
4996 * the master link and will return true if any of M/S links is
5003 * True if the port online status is available and online.
5005 bool ata_link_online(struct ata_link *link)
5007 struct ata_link *slave = link->ap->slave_link;
5009 WARN_ON(link == slave); /* shouldn't be called on slave link */
5011 return ata_phys_link_online(link) ||
5012 (slave && ata_phys_link_online(slave));
5014 EXPORT_SYMBOL_GPL(ata_link_online);
5017 * ata_link_offline - test whether the given link is offline
5018 * @link: ATA link to test
5020 * Test whether @link is offline. This is identical to
5021 * ata_phys_link_offline() when there's no slave link. When
5022 * there's a slave link, this function should only be called on
5023 * the master link and will return true if both M/S links are
5030 * True if the port offline status is available and offline.
5032 bool ata_link_offline(struct ata_link *link)
5034 struct ata_link *slave = link->ap->slave_link;
5036 WARN_ON(link == slave); /* shouldn't be called on slave link */
5038 return ata_phys_link_offline(link) &&
5039 (!slave || ata_phys_link_offline(slave));
5041 EXPORT_SYMBOL_GPL(ata_link_offline);
5044 static void ata_port_request_pm(struct ata_port *ap, pm_message_t mesg,
5045 unsigned int action, unsigned int ehi_flags,
5048 struct ata_link *link;
5049 unsigned long flags;
5051 /* Previous resume operation might still be in
5052 * progress. Wait for PM_PENDING to clear.
5054 if (ap->pflags & ATA_PFLAG_PM_PENDING) {
5055 ata_port_wait_eh(ap);
5056 WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING);
5059 /* request PM ops to EH */
5060 spin_lock_irqsave(ap->lock, flags);
5063 ap->pflags |= ATA_PFLAG_PM_PENDING;
5064 ata_for_each_link(link, ap, HOST_FIRST) {
5065 link->eh_info.action |= action;
5066 link->eh_info.flags |= ehi_flags;
5069 ata_port_schedule_eh(ap);
5071 spin_unlock_irqrestore(ap->lock, flags);
5074 ata_port_wait_eh(ap);
5075 WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING);
5080 * On some hardware, device fails to respond after spun down for suspend. As
5081 * the device won't be used before being resumed, we don't need to touch the
5082 * device. Ask EH to skip the usual stuff and proceed directly to suspend.
5084 * http://thread.gmane.org/gmane.linux.ide/46764
5086 static const unsigned int ata_port_suspend_ehi = ATA_EHI_QUIET
5087 | ATA_EHI_NO_AUTOPSY
5088 | ATA_EHI_NO_RECOVERY;
5090 static void ata_port_suspend(struct ata_port *ap, pm_message_t mesg)
5092 ata_port_request_pm(ap, mesg, 0, ata_port_suspend_ehi, false);
5095 static void ata_port_suspend_async(struct ata_port *ap, pm_message_t mesg)
5097 ata_port_request_pm(ap, mesg, 0, ata_port_suspend_ehi, true);
5100 static int ata_port_pm_suspend(struct device *dev)
5102 struct ata_port *ap = to_ata_port(dev);
5104 if (pm_runtime_suspended(dev))
5107 ata_port_suspend(ap, PMSG_SUSPEND);
5111 static int ata_port_pm_freeze(struct device *dev)
5113 struct ata_port *ap = to_ata_port(dev);
5115 if (pm_runtime_suspended(dev))
5118 ata_port_suspend(ap, PMSG_FREEZE);
5122 static int ata_port_pm_poweroff(struct device *dev)
5124 ata_port_suspend(to_ata_port(dev), PMSG_HIBERNATE);
5128 static const unsigned int ata_port_resume_ehi = ATA_EHI_NO_AUTOPSY
5131 static void ata_port_resume(struct ata_port *ap, pm_message_t mesg)
5133 ata_port_request_pm(ap, mesg, ATA_EH_RESET, ata_port_resume_ehi, false);
5136 static void ata_port_resume_async(struct ata_port *ap, pm_message_t mesg)
5138 ata_port_request_pm(ap, mesg, ATA_EH_RESET, ata_port_resume_ehi, true);
5141 static int ata_port_pm_resume(struct device *dev)
5143 ata_port_resume_async(to_ata_port(dev), PMSG_RESUME);
5144 pm_runtime_disable(dev);
5145 pm_runtime_set_active(dev);
5146 pm_runtime_enable(dev);
5151 * For ODDs, the upper layer will poll for media change every few seconds,
5152 * which will make it enter and leave suspend state every few seconds. And
5153 * as each suspend will cause a hard/soft reset, the gain of runtime suspend
5154 * is very little and the ODD may malfunction after constantly being reset.
5155 * So the idle callback here will not proceed to suspend if a non-ZPODD capable
5156 * ODD is attached to the port.
5158 static int ata_port_runtime_idle(struct device *dev)
5160 struct ata_port *ap = to_ata_port(dev);
5161 struct ata_link *link;
5162 struct ata_device *adev;
5164 ata_for_each_link(link, ap, HOST_FIRST) {
5165 ata_for_each_dev(adev, link, ENABLED)
5166 if (adev->class == ATA_DEV_ATAPI &&
5167 !zpodd_dev_enabled(adev))
5174 static int ata_port_runtime_suspend(struct device *dev)
5176 ata_port_suspend(to_ata_port(dev), PMSG_AUTO_SUSPEND);
5180 static int ata_port_runtime_resume(struct device *dev)
5182 ata_port_resume(to_ata_port(dev), PMSG_AUTO_RESUME);
5186 static const struct dev_pm_ops ata_port_pm_ops = {
5187 .suspend = ata_port_pm_suspend,
5188 .resume = ata_port_pm_resume,
5189 .freeze = ata_port_pm_freeze,
5190 .thaw = ata_port_pm_resume,
5191 .poweroff = ata_port_pm_poweroff,
5192 .restore = ata_port_pm_resume,
5194 .runtime_suspend = ata_port_runtime_suspend,
5195 .runtime_resume = ata_port_runtime_resume,
5196 .runtime_idle = ata_port_runtime_idle,
5199 /* sas ports don't participate in pm runtime management of ata_ports,
5200 * and need to resume ata devices at the domain level, not the per-port
5201 * level. sas suspend/resume is async to allow parallel port recovery
5202 * since sas has multiple ata_port instances per Scsi_Host.
5204 void ata_sas_port_suspend(struct ata_port *ap)
5206 ata_port_suspend_async(ap, PMSG_SUSPEND);
5208 EXPORT_SYMBOL_GPL(ata_sas_port_suspend);
5210 void ata_sas_port_resume(struct ata_port *ap)
5212 ata_port_resume_async(ap, PMSG_RESUME);
5214 EXPORT_SYMBOL_GPL(ata_sas_port_resume);
5217 * ata_host_suspend - suspend host
5218 * @host: host to suspend
5221 * Suspend @host. Actual operation is performed by port suspend.
5223 int ata_host_suspend(struct ata_host *host, pm_message_t mesg)
5225 host->dev->power.power_state = mesg;
5228 EXPORT_SYMBOL_GPL(ata_host_suspend);
5231 * ata_host_resume - resume host
5232 * @host: host to resume
5234 * Resume @host. Actual operation is performed by port resume.
5236 void ata_host_resume(struct ata_host *host)
5238 host->dev->power.power_state = PMSG_ON;
5240 EXPORT_SYMBOL_GPL(ata_host_resume);
5243 const struct device_type ata_port_type = {
5246 .pm = &ata_port_pm_ops,
5251 * ata_dev_init - Initialize an ata_device structure
5252 * @dev: Device structure to initialize
5254 * Initialize @dev in preparation for probing.
5257 * Inherited from caller.
5259 void ata_dev_init(struct ata_device *dev)
5261 struct ata_link *link = ata_dev_phys_link(dev);
5262 struct ata_port *ap = link->ap;
5263 unsigned long flags;
5265 /* SATA spd limit is bound to the attached device, reset together */
5266 link->sata_spd_limit = link->hw_sata_spd_limit;
5269 /* High bits of dev->flags are used to record warm plug
5270 * requests which occur asynchronously. Synchronize using
5273 spin_lock_irqsave(ap->lock, flags);
5274 dev->flags &= ~ATA_DFLAG_INIT_MASK;
5276 spin_unlock_irqrestore(ap->lock, flags);
5278 memset((void *)dev + ATA_DEVICE_CLEAR_BEGIN, 0,
5279 ATA_DEVICE_CLEAR_END - ATA_DEVICE_CLEAR_BEGIN);
5280 dev->pio_mask = UINT_MAX;
5281 dev->mwdma_mask = UINT_MAX;
5282 dev->udma_mask = UINT_MAX;
5286 * ata_link_init - Initialize an ata_link structure
5287 * @ap: ATA port link is attached to
5288 * @link: Link structure to initialize
5289 * @pmp: Port multiplier port number
5294 * Kernel thread context (may sleep)
5296 void ata_link_init(struct ata_port *ap, struct ata_link *link, int pmp)
5300 /* clear everything except for devices */
5301 memset((void *)link + ATA_LINK_CLEAR_BEGIN, 0,
5302 ATA_LINK_CLEAR_END - ATA_LINK_CLEAR_BEGIN);
5306 link->active_tag = ATA_TAG_POISON;
5307 link->hw_sata_spd_limit = UINT_MAX;
5309 /* can't use iterator, ap isn't initialized yet */
5310 for (i = 0; i < ATA_MAX_DEVICES; i++) {
5311 struct ata_device *dev = &link->device[i];
5314 dev->devno = dev - link->device;
5315 #ifdef CONFIG_ATA_ACPI
5316 dev->gtf_filter = ata_acpi_gtf_filter;
5323 * sata_link_init_spd - Initialize link->sata_spd_limit
5324 * @link: Link to configure sata_spd_limit for
5326 * Initialize ``link->[hw_]sata_spd_limit`` to the currently
5330 * Kernel thread context (may sleep).
5333 * 0 on success, -errno on failure.
5335 int sata_link_init_spd(struct ata_link *link)
5340 rc = sata_scr_read(link, SCR_CONTROL, &link->saved_scontrol);
5344 spd = (link->saved_scontrol >> 4) & 0xf;
5346 link->hw_sata_spd_limit &= (1 << spd) - 1;
5348 ata_force_link_limits(link);
5350 link->sata_spd_limit = link->hw_sata_spd_limit;
5356 * ata_port_alloc - allocate and initialize basic ATA port resources
5357 * @host: ATA host this allocated port belongs to
5359 * Allocate and initialize basic ATA port resources.
5362 * Allocate ATA port on success, NULL on failure.
5365 * Inherited from calling layer (may sleep).
5367 struct ata_port *ata_port_alloc(struct ata_host *host)
5369 struct ata_port *ap;
5373 ap = kzalloc(sizeof(*ap), GFP_KERNEL);
5377 ap->pflags |= ATA_PFLAG_INITIALIZING | ATA_PFLAG_FROZEN;
5378 ap->lock = &host->lock;
5380 ap->local_port_no = -1;
5382 ap->dev = host->dev;
5384 #if defined(ATA_VERBOSE_DEBUG)
5385 /* turn on all debugging levels */
5386 ap->msg_enable = 0x00FF;
5387 #elif defined(ATA_DEBUG)
5388 ap->msg_enable = ATA_MSG_DRV | ATA_MSG_INFO | ATA_MSG_CTL | ATA_MSG_WARN | ATA_MSG_ERR;
5390 ap->msg_enable = ATA_MSG_DRV | ATA_MSG_ERR | ATA_MSG_WARN;
5393 mutex_init(&ap->scsi_scan_mutex);
5394 INIT_DELAYED_WORK(&ap->hotplug_task, ata_scsi_hotplug);
5395 INIT_WORK(&ap->scsi_rescan_task, ata_scsi_dev_rescan);
5396 INIT_LIST_HEAD(&ap->eh_done_q);
5397 init_waitqueue_head(&ap->eh_wait_q);
5398 init_completion(&ap->park_req_pending);
5399 timer_setup(&ap->fastdrain_timer, ata_eh_fastdrain_timerfn,
5402 ap->cbl = ATA_CBL_NONE;
5404 ata_link_init(ap, &ap->link, 0);
5407 ap->stats.unhandled_irq = 1;
5408 ap->stats.idle_irq = 1;
5410 ata_sff_port_init(ap);
5415 static void ata_devres_release(struct device *gendev, void *res)
5417 struct ata_host *host = dev_get_drvdata(gendev);
5420 for (i = 0; i < host->n_ports; i++) {
5421 struct ata_port *ap = host->ports[i];
5427 scsi_host_put(ap->scsi_host);
5431 dev_set_drvdata(gendev, NULL);
5435 static void ata_host_release(struct kref *kref)
5437 struct ata_host *host = container_of(kref, struct ata_host, kref);
5440 for (i = 0; i < host->n_ports; i++) {
5441 struct ata_port *ap = host->ports[i];
5443 kfree(ap->pmp_link);
5444 kfree(ap->slave_link);
5446 host->ports[i] = NULL;
5451 void ata_host_get(struct ata_host *host)
5453 kref_get(&host->kref);
5456 void ata_host_put(struct ata_host *host)
5458 kref_put(&host->kref, ata_host_release);
5460 EXPORT_SYMBOL_GPL(ata_host_put);
5463 * ata_host_alloc - allocate and init basic ATA host resources
5464 * @dev: generic device this host is associated with
5465 * @max_ports: maximum number of ATA ports associated with this host
5467 * Allocate and initialize basic ATA host resources. LLD calls
5468 * this function to allocate a host, initializes it fully and
5469 * attaches it using ata_host_register().
5471 * @max_ports ports are allocated and host->n_ports is
5472 * initialized to @max_ports. The caller is allowed to decrease
5473 * host->n_ports before calling ata_host_register(). The unused
5474 * ports will be automatically freed on registration.
5477 * Allocate ATA host on success, NULL on failure.
5480 * Inherited from calling layer (may sleep).
5482 struct ata_host *ata_host_alloc(struct device *dev, int max_ports)
5484 struct ata_host *host;
5491 /* alloc a container for our list of ATA ports (buses) */
5492 sz = sizeof(struct ata_host) + (max_ports + 1) * sizeof(void *);
5493 host = kzalloc(sz, GFP_KERNEL);
5497 if (!devres_open_group(dev, NULL, GFP_KERNEL))
5500 dr = devres_alloc(ata_devres_release, 0, GFP_KERNEL);
5504 devres_add(dev, dr);
5505 dev_set_drvdata(dev, host);
5507 spin_lock_init(&host->lock);
5508 mutex_init(&host->eh_mutex);
5510 host->n_ports = max_ports;
5511 kref_init(&host->kref);
5513 /* allocate ports bound to this host */
5514 for (i = 0; i < max_ports; i++) {
5515 struct ata_port *ap;
5517 ap = ata_port_alloc(host);
5522 host->ports[i] = ap;
5525 devres_remove_group(dev, NULL);
5529 devres_release_group(dev, NULL);
5534 EXPORT_SYMBOL_GPL(ata_host_alloc);
5537 * ata_host_alloc_pinfo - alloc host and init with port_info array
5538 * @dev: generic device this host is associated with
5539 * @ppi: array of ATA port_info to initialize host with
5540 * @n_ports: number of ATA ports attached to this host
5542 * Allocate ATA host and initialize with info from @ppi. If NULL
5543 * terminated, @ppi may contain fewer entries than @n_ports. The
5544 * last entry will be used for the remaining ports.
5547 * Allocate ATA host on success, NULL on failure.
5550 * Inherited from calling layer (may sleep).
5552 struct ata_host *ata_host_alloc_pinfo(struct device *dev,
5553 const struct ata_port_info * const * ppi,
5556 const struct ata_port_info *pi;
5557 struct ata_host *host;
5560 host = ata_host_alloc(dev, n_ports);
5564 for (i = 0, j = 0, pi = NULL; i < host->n_ports; i++) {
5565 struct ata_port *ap = host->ports[i];
5570 ap->pio_mask = pi->pio_mask;
5571 ap->mwdma_mask = pi->mwdma_mask;
5572 ap->udma_mask = pi->udma_mask;
5573 ap->flags |= pi->flags;
5574 ap->link.flags |= pi->link_flags;
5575 ap->ops = pi->port_ops;
5577 if (!host->ops && (pi->port_ops != &ata_dummy_port_ops))
5578 host->ops = pi->port_ops;
5583 EXPORT_SYMBOL_GPL(ata_host_alloc_pinfo);
5585 static void ata_host_stop(struct device *gendev, void *res)
5587 struct ata_host *host = dev_get_drvdata(gendev);
5590 WARN_ON(!(host->flags & ATA_HOST_STARTED));
5592 for (i = 0; i < host->n_ports; i++) {
5593 struct ata_port *ap = host->ports[i];
5595 if (ap->ops->port_stop)
5596 ap->ops->port_stop(ap);
5599 if (host->ops->host_stop)
5600 host->ops->host_stop(host);
5604 * ata_finalize_port_ops - finalize ata_port_operations
5605 * @ops: ata_port_operations to finalize
5607 * An ata_port_operations can inherit from another ops and that
5608 * ops can again inherit from another. This can go on as many
5609 * times as necessary as long as there is no loop in the
5610 * inheritance chain.
5612 * Ops tables are finalized when the host is started. NULL or
5613 * unspecified entries are inherited from the closet ancestor
5614 * which has the method and the entry is populated with it.
5615 * After finalization, the ops table directly points to all the
5616 * methods and ->inherits is no longer necessary and cleared.
5618 * Using ATA_OP_NULL, inheriting ops can force a method to NULL.
5623 static void ata_finalize_port_ops(struct ata_port_operations *ops)
5625 static DEFINE_SPINLOCK(lock);
5626 const struct ata_port_operations *cur;
5627 void **begin = (void **)ops;
5628 void **end = (void **)&ops->inherits;
5631 if (!ops || !ops->inherits)
5636 for (cur = ops->inherits; cur; cur = cur->inherits) {
5637 void **inherit = (void **)cur;
5639 for (pp = begin; pp < end; pp++, inherit++)
5644 for (pp = begin; pp < end; pp++)
5648 ops->inherits = NULL;
5654 * ata_host_start - start and freeze ports of an ATA host
5655 * @host: ATA host to start ports for
5657 * Start and then freeze ports of @host. Started status is
5658 * recorded in host->flags, so this function can be called
5659 * multiple times. Ports are guaranteed to get started only
5660 * once. If host->ops isn't initialized yet, its set to the
5661 * first non-dummy port ops.
5664 * Inherited from calling layer (may sleep).
5667 * 0 if all ports are started successfully, -errno otherwise.
5669 int ata_host_start(struct ata_host *host)
5672 void *start_dr = NULL;
5675 if (host->flags & ATA_HOST_STARTED)
5678 ata_finalize_port_ops(host->ops);
5680 for (i = 0; i < host->n_ports; i++) {
5681 struct ata_port *ap = host->ports[i];
5683 ata_finalize_port_ops(ap->ops);
5685 if (!host->ops && !ata_port_is_dummy(ap))
5686 host->ops = ap->ops;
5688 if (ap->ops->port_stop)
5692 if (host->ops && host->ops->host_stop)
5696 start_dr = devres_alloc(ata_host_stop, 0, GFP_KERNEL);
5701 for (i = 0; i < host->n_ports; i++) {
5702 struct ata_port *ap = host->ports[i];
5704 if (ap->ops->port_start) {
5705 rc = ap->ops->port_start(ap);
5709 "failed to start port %d (errno=%d)\n",
5714 ata_eh_freeze_port(ap);
5718 devres_add(host->dev, start_dr);
5719 host->flags |= ATA_HOST_STARTED;
5724 struct ata_port *ap = host->ports[i];
5726 if (ap->ops->port_stop)
5727 ap->ops->port_stop(ap);
5729 devres_free(start_dr);
5732 EXPORT_SYMBOL_GPL(ata_host_start);
5735 * ata_host_init - Initialize a host struct for sas (ipr, libsas)
5736 * @host: host to initialize
5737 * @dev: device host is attached to
5741 void ata_host_init(struct ata_host *host, struct device *dev,
5742 struct ata_port_operations *ops)
5744 spin_lock_init(&host->lock);
5745 mutex_init(&host->eh_mutex);
5746 host->n_tags = ATA_MAX_QUEUE;
5749 kref_init(&host->kref);
5751 EXPORT_SYMBOL_GPL(ata_host_init);
5753 void __ata_port_probe(struct ata_port *ap)
5755 struct ata_eh_info *ehi = &ap->link.eh_info;
5756 unsigned long flags;
5758 /* kick EH for boot probing */
5759 spin_lock_irqsave(ap->lock, flags);
5761 ehi->probe_mask |= ATA_ALL_DEVICES;
5762 ehi->action |= ATA_EH_RESET;
5763 ehi->flags |= ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET;
5765 ap->pflags &= ~ATA_PFLAG_INITIALIZING;
5766 ap->pflags |= ATA_PFLAG_LOADING;
5767 ata_port_schedule_eh(ap);
5769 spin_unlock_irqrestore(ap->lock, flags);
5772 int ata_port_probe(struct ata_port *ap)
5776 if (ap->ops->error_handler) {
5777 __ata_port_probe(ap);
5778 ata_port_wait_eh(ap);
5780 DPRINTK("ata%u: bus probe begin\n", ap->print_id);
5781 rc = ata_bus_probe(ap);
5782 DPRINTK("ata%u: bus probe end\n", ap->print_id);
5788 static void async_port_probe(void *data, async_cookie_t cookie)
5790 struct ata_port *ap = data;
5793 * If we're not allowed to scan this host in parallel,
5794 * we need to wait until all previous scans have completed
5795 * before going further.
5796 * Jeff Garzik says this is only within a controller, so we
5797 * don't need to wait for port 0, only for later ports.
5799 if (!(ap->host->flags & ATA_HOST_PARALLEL_SCAN) && ap->port_no != 0)
5800 async_synchronize_cookie(cookie);
5802 (void)ata_port_probe(ap);
5804 /* in order to keep device order, we need to synchronize at this point */
5805 async_synchronize_cookie(cookie);
5807 ata_scsi_scan_host(ap, 1);
5811 * ata_host_register - register initialized ATA host
5812 * @host: ATA host to register
5813 * @sht: template for SCSI host
5815 * Register initialized ATA host. @host is allocated using
5816 * ata_host_alloc() and fully initialized by LLD. This function
5817 * starts ports, registers @host with ATA and SCSI layers and
5818 * probe registered devices.
5821 * Inherited from calling layer (may sleep).
5824 * 0 on success, -errno otherwise.
5826 int ata_host_register(struct ata_host *host, struct scsi_host_template *sht)
5830 host->n_tags = clamp(sht->can_queue, 1, ATA_MAX_QUEUE);
5832 /* host must have been started */
5833 if (!(host->flags & ATA_HOST_STARTED)) {
5834 dev_err(host->dev, "BUG: trying to register unstarted host\n");
5839 /* Blow away unused ports. This happens when LLD can't
5840 * determine the exact number of ports to allocate at
5843 for (i = host->n_ports; host->ports[i]; i++)
5844 kfree(host->ports[i]);
5846 /* give ports names and add SCSI hosts */
5847 for (i = 0; i < host->n_ports; i++) {
5848 host->ports[i]->print_id = atomic_inc_return(&ata_print_id);
5849 host->ports[i]->local_port_no = i + 1;
5852 /* Create associated sysfs transport objects */
5853 for (i = 0; i < host->n_ports; i++) {
5854 rc = ata_tport_add(host->dev,host->ports[i]);
5860 rc = ata_scsi_add_hosts(host, sht);
5864 /* set cable, sata_spd_limit and report */
5865 for (i = 0; i < host->n_ports; i++) {
5866 struct ata_port *ap = host->ports[i];
5867 unsigned long xfer_mask;
5869 /* set SATA cable type if still unset */
5870 if (ap->cbl == ATA_CBL_NONE && (ap->flags & ATA_FLAG_SATA))
5871 ap->cbl = ATA_CBL_SATA;
5873 /* init sata_spd_limit to the current value */
5874 sata_link_init_spd(&ap->link);
5876 sata_link_init_spd(ap->slave_link);
5878 /* print per-port info to dmesg */
5879 xfer_mask = ata_pack_xfermask(ap->pio_mask, ap->mwdma_mask,
5882 if (!ata_port_is_dummy(ap)) {
5883 ata_port_info(ap, "%cATA max %s %s\n",
5884 (ap->flags & ATA_FLAG_SATA) ? 'S' : 'P',
5885 ata_mode_string(xfer_mask),
5886 ap->link.eh_info.desc);
5887 ata_ehi_clear_desc(&ap->link.eh_info);
5889 ata_port_info(ap, "DUMMY\n");
5892 /* perform each probe asynchronously */
5893 for (i = 0; i < host->n_ports; i++) {
5894 struct ata_port *ap = host->ports[i];
5895 ap->cookie = async_schedule(async_port_probe, ap);
5902 ata_tport_delete(host->ports[i]);
5907 EXPORT_SYMBOL_GPL(ata_host_register);
5910 * ata_host_activate - start host, request IRQ and register it
5911 * @host: target ATA host
5912 * @irq: IRQ to request
5913 * @irq_handler: irq_handler used when requesting IRQ
5914 * @irq_flags: irq_flags used when requesting IRQ
5915 * @sht: scsi_host_template to use when registering the host
5917 * After allocating an ATA host and initializing it, most libata
5918 * LLDs perform three steps to activate the host - start host,
5919 * request IRQ and register it. This helper takes necessary
5920 * arguments and performs the three steps in one go.
5922 * An invalid IRQ skips the IRQ registration and expects the host to
5923 * have set polling mode on the port. In this case, @irq_handler
5927 * Inherited from calling layer (may sleep).
5930 * 0 on success, -errno otherwise.
5932 int ata_host_activate(struct ata_host *host, int irq,
5933 irq_handler_t irq_handler, unsigned long irq_flags,
5934 struct scsi_host_template *sht)
5939 rc = ata_host_start(host);
5943 /* Special case for polling mode */
5945 WARN_ON(irq_handler);
5946 return ata_host_register(host, sht);
5949 irq_desc = devm_kasprintf(host->dev, GFP_KERNEL, "%s[%s]",
5950 dev_driver_string(host->dev),
5951 dev_name(host->dev));
5955 rc = devm_request_irq(host->dev, irq, irq_handler, irq_flags,
5960 for (i = 0; i < host->n_ports; i++)
5961 ata_port_desc(host->ports[i], "irq %d", irq);
5963 rc = ata_host_register(host, sht);
5964 /* if failed, just free the IRQ and leave ports alone */
5966 devm_free_irq(host->dev, irq, host);
5970 EXPORT_SYMBOL_GPL(ata_host_activate);
5973 * ata_port_detach - Detach ATA port in preparation of device removal
5974 * @ap: ATA port to be detached
5976 * Detach all ATA devices and the associated SCSI devices of @ap;
5977 * then, remove the associated SCSI host. @ap is guaranteed to
5978 * be quiescent on return from this function.
5981 * Kernel thread context (may sleep).
5983 static void ata_port_detach(struct ata_port *ap)
5985 unsigned long flags;
5986 struct ata_link *link;
5987 struct ata_device *dev;
5989 if (!ap->ops->error_handler)
5992 /* tell EH we're leaving & flush EH */
5993 spin_lock_irqsave(ap->lock, flags);
5994 ap->pflags |= ATA_PFLAG_UNLOADING;
5995 ata_port_schedule_eh(ap);
5996 spin_unlock_irqrestore(ap->lock, flags);
5998 /* wait till EH commits suicide */
5999 ata_port_wait_eh(ap);
6001 /* it better be dead now */
6002 WARN_ON(!(ap->pflags & ATA_PFLAG_UNLOADED));
6004 cancel_delayed_work_sync(&ap->hotplug_task);
6007 /* clean up zpodd on port removal */
6008 ata_for_each_link(link, ap, HOST_FIRST) {
6009 ata_for_each_dev(dev, link, ALL) {
6010 if (zpodd_dev_enabled(dev))
6016 for (i = 0; i < SATA_PMP_MAX_PORTS; i++)
6017 ata_tlink_delete(&ap->pmp_link[i]);
6019 /* remove the associated SCSI host */
6020 scsi_remove_host(ap->scsi_host);
6021 ata_tport_delete(ap);
6025 * ata_host_detach - Detach all ports of an ATA host
6026 * @host: Host to detach
6028 * Detach all ports of @host.
6031 * Kernel thread context (may sleep).
6033 void ata_host_detach(struct ata_host *host)
6037 for (i = 0; i < host->n_ports; i++) {
6038 /* Ensure ata_port probe has completed */
6039 async_synchronize_cookie(host->ports[i]->cookie + 1);
6040 ata_port_detach(host->ports[i]);
6043 /* the host is dead now, dissociate ACPI */
6044 ata_acpi_dissociate(host);
6046 EXPORT_SYMBOL_GPL(ata_host_detach);
6051 * ata_pci_remove_one - PCI layer callback for device removal
6052 * @pdev: PCI device that was removed
6054 * PCI layer indicates to libata via this hook that hot-unplug or
6055 * module unload event has occurred. Detach all ports. Resource
6056 * release is handled via devres.
6059 * Inherited from PCI layer (may sleep).
6061 void ata_pci_remove_one(struct pci_dev *pdev)
6063 struct ata_host *host = pci_get_drvdata(pdev);
6065 ata_host_detach(host);
6067 EXPORT_SYMBOL_GPL(ata_pci_remove_one);
6069 void ata_pci_shutdown_one(struct pci_dev *pdev)
6071 struct ata_host *host = pci_get_drvdata(pdev);
6074 for (i = 0; i < host->n_ports; i++) {
6075 struct ata_port *ap = host->ports[i];
6077 ap->pflags |= ATA_PFLAG_FROZEN;
6079 /* Disable port interrupts */
6080 if (ap->ops->freeze)
6081 ap->ops->freeze(ap);
6083 /* Stop the port DMA engines */
6084 if (ap->ops->port_stop)
6085 ap->ops->port_stop(ap);
6088 EXPORT_SYMBOL_GPL(ata_pci_shutdown_one);
6090 /* move to PCI subsystem */
6091 int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits)
6093 unsigned long tmp = 0;
6095 switch (bits->width) {
6098 pci_read_config_byte(pdev, bits->reg, &tmp8);
6104 pci_read_config_word(pdev, bits->reg, &tmp16);
6110 pci_read_config_dword(pdev, bits->reg, &tmp32);
6121 return (tmp == bits->val) ? 1 : 0;
6123 EXPORT_SYMBOL_GPL(pci_test_config_bits);
6126 void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg)
6128 pci_save_state(pdev);
6129 pci_disable_device(pdev);
6131 if (mesg.event & PM_EVENT_SLEEP)
6132 pci_set_power_state(pdev, PCI_D3hot);
6134 EXPORT_SYMBOL_GPL(ata_pci_device_do_suspend);
6136 int ata_pci_device_do_resume(struct pci_dev *pdev)
6140 pci_set_power_state(pdev, PCI_D0);
6141 pci_restore_state(pdev);
6143 rc = pcim_enable_device(pdev);
6146 "failed to enable device after resume (%d)\n", rc);
6150 pci_set_master(pdev);
6153 EXPORT_SYMBOL_GPL(ata_pci_device_do_resume);
6155 int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg)
6157 struct ata_host *host = pci_get_drvdata(pdev);
6160 rc = ata_host_suspend(host, mesg);
6164 ata_pci_device_do_suspend(pdev, mesg);
6168 EXPORT_SYMBOL_GPL(ata_pci_device_suspend);
6170 int ata_pci_device_resume(struct pci_dev *pdev)
6172 struct ata_host *host = pci_get_drvdata(pdev);
6175 rc = ata_pci_device_do_resume(pdev);
6177 ata_host_resume(host);
6180 EXPORT_SYMBOL_GPL(ata_pci_device_resume);
6181 #endif /* CONFIG_PM */
6182 #endif /* CONFIG_PCI */
6185 * ata_platform_remove_one - Platform layer callback for device removal
6186 * @pdev: Platform device that was removed
6188 * Platform layer indicates to libata via this hook that hot-unplug or
6189 * module unload event has occurred. Detach all ports. Resource
6190 * release is handled via devres.
6193 * Inherited from platform layer (may sleep).
6195 int ata_platform_remove_one(struct platform_device *pdev)
6197 struct ata_host *host = platform_get_drvdata(pdev);
6199 ata_host_detach(host);
6203 EXPORT_SYMBOL_GPL(ata_platform_remove_one);
6205 #ifdef CONFIG_ATA_FORCE
6206 static int __init ata_parse_force_one(char **cur,
6207 struct ata_force_ent *force_ent,
6208 const char **reason)
6210 static const struct ata_force_param force_tbl[] __initconst = {
6211 { "40c", .cbl = ATA_CBL_PATA40 },
6212 { "80c", .cbl = ATA_CBL_PATA80 },
6213 { "short40c", .cbl = ATA_CBL_PATA40_SHORT },
6214 { "unk", .cbl = ATA_CBL_PATA_UNK },
6215 { "ign", .cbl = ATA_CBL_PATA_IGN },
6216 { "sata", .cbl = ATA_CBL_SATA },
6217 { "1.5Gbps", .spd_limit = 1 },
6218 { "3.0Gbps", .spd_limit = 2 },
6219 { "noncq", .horkage_on = ATA_HORKAGE_NONCQ },
6220 { "ncq", .horkage_off = ATA_HORKAGE_NONCQ },
6221 { "noncqtrim", .horkage_on = ATA_HORKAGE_NO_NCQ_TRIM },
6222 { "ncqtrim", .horkage_off = ATA_HORKAGE_NO_NCQ_TRIM },
6223 { "noncqati", .horkage_on = ATA_HORKAGE_NO_NCQ_ON_ATI },
6224 { "ncqati", .horkage_off = ATA_HORKAGE_NO_NCQ_ON_ATI },
6225 { "dump_id", .horkage_on = ATA_HORKAGE_DUMP_ID },
6226 { "pio0", .xfer_mask = 1 << (ATA_SHIFT_PIO + 0) },
6227 { "pio1", .xfer_mask = 1 << (ATA_SHIFT_PIO + 1) },
6228 { "pio2", .xfer_mask = 1 << (ATA_SHIFT_PIO + 2) },
6229 { "pio3", .xfer_mask = 1 << (ATA_SHIFT_PIO + 3) },
6230 { "pio4", .xfer_mask = 1 << (ATA_SHIFT_PIO + 4) },
6231 { "pio5", .xfer_mask = 1 << (ATA_SHIFT_PIO + 5) },
6232 { "pio6", .xfer_mask = 1 << (ATA_SHIFT_PIO + 6) },
6233 { "mwdma0", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 0) },
6234 { "mwdma1", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 1) },
6235 { "mwdma2", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 2) },
6236 { "mwdma3", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 3) },
6237 { "mwdma4", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 4) },
6238 { "udma0", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 0) },
6239 { "udma16", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 0) },
6240 { "udma/16", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 0) },
6241 { "udma1", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 1) },
6242 { "udma25", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 1) },
6243 { "udma/25", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 1) },
6244 { "udma2", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 2) },
6245 { "udma33", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 2) },
6246 { "udma/33", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 2) },
6247 { "udma3", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 3) },
6248 { "udma44", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 3) },
6249 { "udma/44", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 3) },
6250 { "udma4", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 4) },
6251 { "udma66", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 4) },
6252 { "udma/66", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 4) },
6253 { "udma5", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 5) },
6254 { "udma100", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 5) },
6255 { "udma/100", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 5) },
6256 { "udma6", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 6) },
6257 { "udma133", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 6) },
6258 { "udma/133", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 6) },
6259 { "udma7", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 7) },
6260 { "nohrst", .lflags = ATA_LFLAG_NO_HRST },
6261 { "nosrst", .lflags = ATA_LFLAG_NO_SRST },
6262 { "norst", .lflags = ATA_LFLAG_NO_HRST | ATA_LFLAG_NO_SRST },
6263 { "rstonce", .lflags = ATA_LFLAG_RST_ONCE },
6264 { "atapi_dmadir", .horkage_on = ATA_HORKAGE_ATAPI_DMADIR },
6265 { "disable", .horkage_on = ATA_HORKAGE_DISABLE },
6267 char *start = *cur, *p = *cur;
6268 char *id, *val, *endp;
6269 const struct ata_force_param *match_fp = NULL;
6270 int nr_matches = 0, i;
6272 /* find where this param ends and update *cur */
6273 while (*p != '\0' && *p != ',')
6284 p = strchr(start, ':');
6286 val = strstrip(start);
6291 id = strstrip(start);
6292 val = strstrip(p + 1);
6295 p = strchr(id, '.');
6298 force_ent->device = simple_strtoul(p, &endp, 10);
6299 if (p == endp || *endp != '\0') {
6300 *reason = "invalid device";
6305 force_ent->port = simple_strtoul(id, &endp, 10);
6306 if (id == endp || *endp != '\0') {
6307 *reason = "invalid port/link";
6312 /* parse val, allow shortcuts so that both 1.5 and 1.5Gbps work */
6313 for (i = 0; i < ARRAY_SIZE(force_tbl); i++) {
6314 const struct ata_force_param *fp = &force_tbl[i];
6316 if (strncasecmp(val, fp->name, strlen(val)))
6322 if (strcasecmp(val, fp->name) == 0) {
6329 *reason = "unknown value";
6332 if (nr_matches > 1) {
6333 *reason = "ambiguous value";
6337 force_ent->param = *match_fp;
6342 static void __init ata_parse_force_param(void)
6344 int idx = 0, size = 1;
6345 int last_port = -1, last_device = -1;
6346 char *p, *cur, *next;
6348 /* calculate maximum number of params and allocate force_tbl */
6349 for (p = ata_force_param_buf; *p; p++)
6353 ata_force_tbl = kcalloc(size, sizeof(ata_force_tbl[0]), GFP_KERNEL);
6354 if (!ata_force_tbl) {
6355 printk(KERN_WARNING "ata: failed to extend force table, "
6356 "libata.force ignored\n");
6360 /* parse and populate the table */
6361 for (cur = ata_force_param_buf; *cur != '\0'; cur = next) {
6362 const char *reason = "";
6363 struct ata_force_ent te = { .port = -1, .device = -1 };
6366 if (ata_parse_force_one(&next, &te, &reason)) {
6367 printk(KERN_WARNING "ata: failed to parse force "
6368 "parameter \"%s\" (%s)\n",
6373 if (te.port == -1) {
6374 te.port = last_port;
6375 te.device = last_device;
6378 ata_force_tbl[idx++] = te;
6380 last_port = te.port;
6381 last_device = te.device;
6384 ata_force_tbl_size = idx;
6387 static void ata_free_force_param(void)
6389 kfree(ata_force_tbl);
6392 static inline void ata_parse_force_param(void) { }
6393 static inline void ata_free_force_param(void) { }
6396 static int __init ata_init(void)
6400 ata_parse_force_param();
6402 rc = ata_sff_init();
6404 ata_free_force_param();
6408 libata_transport_init();
6409 ata_scsi_transport_template = ata_attach_transport();
6410 if (!ata_scsi_transport_template) {
6416 printk(KERN_DEBUG "libata version " DRV_VERSION " loaded.\n");
6423 static void __exit ata_exit(void)
6425 ata_release_transport(ata_scsi_transport_template);
6426 libata_transport_exit();
6428 ata_free_force_param();
6431 subsys_initcall(ata_init);
6432 module_exit(ata_exit);
6434 static DEFINE_RATELIMIT_STATE(ratelimit, HZ / 5, 1);
6436 int ata_ratelimit(void)
6438 return __ratelimit(&ratelimit);
6440 EXPORT_SYMBOL_GPL(ata_ratelimit);
6443 * ata_msleep - ATA EH owner aware msleep
6444 * @ap: ATA port to attribute the sleep to
6445 * @msecs: duration to sleep in milliseconds
6447 * Sleeps @msecs. If the current task is owner of @ap's EH, the
6448 * ownership is released before going to sleep and reacquired
6449 * after the sleep is complete. IOW, other ports sharing the
6450 * @ap->host will be allowed to own the EH while this task is
6456 void ata_msleep(struct ata_port *ap, unsigned int msecs)
6458 bool owns_eh = ap && ap->host->eh_owner == current;
6464 unsigned long usecs = msecs * USEC_PER_MSEC;
6465 usleep_range(usecs, usecs + 50);
6473 EXPORT_SYMBOL_GPL(ata_msleep);
6476 * ata_wait_register - wait until register value changes
6477 * @ap: ATA port to wait register for, can be NULL
6478 * @reg: IO-mapped register
6479 * @mask: Mask to apply to read register value
6480 * @val: Wait condition
6481 * @interval: polling interval in milliseconds
6482 * @timeout: timeout in milliseconds
6484 * Waiting for some bits of register to change is a common
6485 * operation for ATA controllers. This function reads 32bit LE
6486 * IO-mapped register @reg and tests for the following condition.
6488 * (*@reg & mask) != val
6490 * If the condition is met, it returns; otherwise, the process is
6491 * repeated after @interval_msec until timeout.
6494 * Kernel thread context (may sleep)
6497 * The final register value.
6499 u32 ata_wait_register(struct ata_port *ap, void __iomem *reg, u32 mask, u32 val,
6500 unsigned long interval, unsigned long timeout)
6502 unsigned long deadline;
6505 tmp = ioread32(reg);
6507 /* Calculate timeout _after_ the first read to make sure
6508 * preceding writes reach the controller before starting to
6509 * eat away the timeout.
6511 deadline = ata_deadline(jiffies, timeout);
6513 while ((tmp & mask) == val && time_before(jiffies, deadline)) {
6514 ata_msleep(ap, interval);
6515 tmp = ioread32(reg);
6520 EXPORT_SYMBOL_GPL(ata_wait_register);
6525 static unsigned int ata_dummy_qc_issue(struct ata_queued_cmd *qc)
6527 return AC_ERR_SYSTEM;
6530 static void ata_dummy_error_handler(struct ata_port *ap)
6535 struct ata_port_operations ata_dummy_port_ops = {
6536 .qc_prep = ata_noop_qc_prep,
6537 .qc_issue = ata_dummy_qc_issue,
6538 .error_handler = ata_dummy_error_handler,
6539 .sched_eh = ata_std_sched_eh,
6540 .end_eh = ata_std_end_eh,
6542 EXPORT_SYMBOL_GPL(ata_dummy_port_ops);
6544 const struct ata_port_info ata_dummy_port_info = {
6545 .port_ops = &ata_dummy_port_ops,
6547 EXPORT_SYMBOL_GPL(ata_dummy_port_info);
6550 * Utility print functions
6552 void ata_port_printk(const struct ata_port *ap, const char *level,
6553 const char *fmt, ...)
6555 struct va_format vaf;
6558 va_start(args, fmt);
6563 printk("%sata%u: %pV", level, ap->print_id, &vaf);
6567 EXPORT_SYMBOL(ata_port_printk);
6569 void ata_link_printk(const struct ata_link *link, const char *level,
6570 const char *fmt, ...)
6572 struct va_format vaf;
6575 va_start(args, fmt);
6580 if (sata_pmp_attached(link->ap) || link->ap->slave_link)
6581 printk("%sata%u.%02u: %pV",
6582 level, link->ap->print_id, link->pmp, &vaf);
6584 printk("%sata%u: %pV",
6585 level, link->ap->print_id, &vaf);
6589 EXPORT_SYMBOL(ata_link_printk);
6591 void ata_dev_printk(const struct ata_device *dev, const char *level,
6592 const char *fmt, ...)
6594 struct va_format vaf;
6597 va_start(args, fmt);
6602 printk("%sata%u.%02u: %pV",
6603 level, dev->link->ap->print_id, dev->link->pmp + dev->devno,
6608 EXPORT_SYMBOL(ata_dev_printk);
6610 void ata_print_version(const struct device *dev, const char *version)
6612 dev_printk(KERN_DEBUG, dev, "version %s\n", version);
6614 EXPORT_SYMBOL(ata_print_version);