2 * libata-core.c - helper library for ATA
4 * Maintained by: Tejun Heo <tj@kernel.org>
5 * Please ALWAYS copy linux-ide@vger.kernel.org
8 * Copyright 2003-2004 Red Hat, Inc. All rights reserved.
9 * Copyright 2003-2004 Jeff Garzik
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2, or (at your option)
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; see the file COPYING. If not, write to
24 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
27 * libata documentation is available via 'make {ps|pdf}docs',
28 * as Documentation/DocBook/libata.*
30 * Hardware documentation available from http://www.t13.org/ and
31 * http://www.sata-io.org/
33 * Standards documents from:
34 * http://www.t13.org (ATA standards, PCI DMA IDE spec)
35 * http://www.t10.org (SCSI MMC - for ATAPI MMC)
36 * http://www.sata-io.org (SATA)
37 * http://www.compactflash.org (CF)
38 * http://www.qic.org (QIC157 - Tape and DSC)
39 * http://www.ce-ata.org (CE-ATA: not supported)
43 #include <linux/kernel.h>
44 #include <linux/module.h>
45 #include <linux/pci.h>
46 #include <linux/init.h>
47 #include <linux/list.h>
49 #include <linux/spinlock.h>
50 #include <linux/blkdev.h>
51 #include <linux/delay.h>
52 #include <linux/timer.h>
53 #include <linux/interrupt.h>
54 #include <linux/completion.h>
55 #include <linux/suspend.h>
56 #include <linux/workqueue.h>
57 #include <linux/scatterlist.h>
59 #include <linux/log2.h>
60 #include <linux/slab.h>
61 #include <linux/glob.h>
62 #include <scsi/scsi.h>
63 #include <scsi/scsi_cmnd.h>
64 #include <scsi/scsi_host.h>
65 #include <linux/libata.h>
66 #include <asm/byteorder.h>
67 #include <linux/cdrom.h>
68 #include <linux/ratelimit.h>
69 #include <linux/pm_runtime.h>
70 #include <linux/platform_device.h>
72 #define CREATE_TRACE_POINTS
73 #include <trace/events/libata.h>
76 #include "libata-transport.h"
78 /* debounce timing parameters in msecs { interval, duration, timeout } */
79 const unsigned long sata_deb_timing_normal[] = { 5, 100, 2000 };
80 const unsigned long sata_deb_timing_hotplug[] = { 25, 500, 2000 };
81 const unsigned long sata_deb_timing_long[] = { 100, 2000, 5000 };
83 const struct ata_port_operations ata_base_port_ops = {
84 .prereset = ata_std_prereset,
85 .postreset = ata_std_postreset,
86 .error_handler = ata_std_error_handler,
87 .sched_eh = ata_std_sched_eh,
88 .end_eh = ata_std_end_eh,
91 const struct ata_port_operations sata_port_ops = {
92 .inherits = &ata_base_port_ops,
94 .qc_defer = ata_std_qc_defer,
95 .hardreset = sata_std_hardreset,
98 static unsigned int ata_dev_init_params(struct ata_device *dev,
99 u16 heads, u16 sectors);
100 static unsigned int ata_dev_set_xfermode(struct ata_device *dev);
101 static void ata_dev_xfermask(struct ata_device *dev);
102 static unsigned long ata_dev_blacklisted(const struct ata_device *dev);
104 atomic_t ata_print_id = ATOMIC_INIT(0);
106 struct ata_force_param {
110 unsigned long xfer_mask;
111 unsigned int horkage_on;
112 unsigned int horkage_off;
116 struct ata_force_ent {
119 struct ata_force_param param;
122 static struct ata_force_ent *ata_force_tbl;
123 static int ata_force_tbl_size;
125 static char ata_force_param_buf[PAGE_SIZE] __initdata;
126 /* param_buf is thrown away after initialization, disallow read */
127 module_param_string(force, ata_force_param_buf, sizeof(ata_force_param_buf), 0);
128 MODULE_PARM_DESC(force, "Force ATA configurations including cable type, link speed and transfer mode (see Documentation/kernel-parameters.txt for details)");
130 static int atapi_enabled = 1;
131 module_param(atapi_enabled, int, 0444);
132 MODULE_PARM_DESC(atapi_enabled, "Enable discovery of ATAPI devices (0=off, 1=on [default])");
134 static int atapi_dmadir = 0;
135 module_param(atapi_dmadir, int, 0444);
136 MODULE_PARM_DESC(atapi_dmadir, "Enable ATAPI DMADIR bridge support (0=off [default], 1=on)");
138 int atapi_passthru16 = 1;
139 module_param(atapi_passthru16, int, 0444);
140 MODULE_PARM_DESC(atapi_passthru16, "Enable ATA_16 passthru for ATAPI devices (0=off, 1=on [default])");
143 module_param_named(fua, libata_fua, int, 0444);
144 MODULE_PARM_DESC(fua, "FUA support (0=off [default], 1=on)");
146 static int ata_ignore_hpa;
147 module_param_named(ignore_hpa, ata_ignore_hpa, int, 0644);
148 MODULE_PARM_DESC(ignore_hpa, "Ignore HPA limit (0=keep BIOS limits, 1=ignore limits, using full disk)");
150 static int libata_dma_mask = ATA_DMA_MASK_ATA|ATA_DMA_MASK_ATAPI|ATA_DMA_MASK_CFA;
151 module_param_named(dma, libata_dma_mask, int, 0444);
152 MODULE_PARM_DESC(dma, "DMA enable/disable (0x1==ATA, 0x2==ATAPI, 0x4==CF)");
154 static int ata_probe_timeout;
155 module_param(ata_probe_timeout, int, 0444);
156 MODULE_PARM_DESC(ata_probe_timeout, "Set ATA probing timeout (seconds)");
158 int libata_noacpi = 0;
159 module_param_named(noacpi, libata_noacpi, int, 0444);
160 MODULE_PARM_DESC(noacpi, "Disable the use of ACPI in probe/suspend/resume (0=off [default], 1=on)");
162 int libata_allow_tpm = 0;
163 module_param_named(allow_tpm, libata_allow_tpm, int, 0444);
164 MODULE_PARM_DESC(allow_tpm, "Permit the use of TPM commands (0=off [default], 1=on)");
167 module_param(atapi_an, int, 0444);
168 MODULE_PARM_DESC(atapi_an, "Enable ATAPI AN media presence notification (0=0ff [default], 1=on)");
170 MODULE_AUTHOR("Jeff Garzik");
171 MODULE_DESCRIPTION("Library module for ATA devices");
172 MODULE_LICENSE("GPL");
173 MODULE_VERSION(DRV_VERSION);
176 static bool ata_sstatus_online(u32 sstatus)
178 return (sstatus & 0xf) == 0x3;
182 * ata_link_next - link iteration helper
183 * @link: the previous link, NULL to start
184 * @ap: ATA port containing links to iterate
185 * @mode: iteration mode, one of ATA_LITER_*
188 * Host lock or EH context.
191 * Pointer to the next link.
193 struct ata_link *ata_link_next(struct ata_link *link, struct ata_port *ap,
194 enum ata_link_iter_mode mode)
196 BUG_ON(mode != ATA_LITER_EDGE &&
197 mode != ATA_LITER_PMP_FIRST && mode != ATA_LITER_HOST_FIRST);
199 /* NULL link indicates start of iteration */
203 case ATA_LITER_PMP_FIRST:
204 if (sata_pmp_attached(ap))
207 case ATA_LITER_HOST_FIRST:
211 /* we just iterated over the host link, what's next? */
212 if (link == &ap->link)
214 case ATA_LITER_HOST_FIRST:
215 if (sata_pmp_attached(ap))
218 case ATA_LITER_PMP_FIRST:
219 if (unlikely(ap->slave_link))
220 return ap->slave_link;
226 /* slave_link excludes PMP */
227 if (unlikely(link == ap->slave_link))
230 /* we were over a PMP link */
231 if (++link < ap->pmp_link + ap->nr_pmp_links)
234 if (mode == ATA_LITER_PMP_FIRST)
241 * ata_dev_next - device iteration helper
242 * @dev: the previous device, NULL to start
243 * @link: ATA link containing devices to iterate
244 * @mode: iteration mode, one of ATA_DITER_*
247 * Host lock or EH context.
250 * Pointer to the next device.
252 struct ata_device *ata_dev_next(struct ata_device *dev, struct ata_link *link,
253 enum ata_dev_iter_mode mode)
255 BUG_ON(mode != ATA_DITER_ENABLED && mode != ATA_DITER_ENABLED_REVERSE &&
256 mode != ATA_DITER_ALL && mode != ATA_DITER_ALL_REVERSE);
258 /* NULL dev indicates start of iteration */
261 case ATA_DITER_ENABLED:
265 case ATA_DITER_ENABLED_REVERSE:
266 case ATA_DITER_ALL_REVERSE:
267 dev = link->device + ata_link_max_devices(link) - 1;
272 /* move to the next one */
274 case ATA_DITER_ENABLED:
276 if (++dev < link->device + ata_link_max_devices(link))
279 case ATA_DITER_ENABLED_REVERSE:
280 case ATA_DITER_ALL_REVERSE:
281 if (--dev >= link->device)
287 if ((mode == ATA_DITER_ENABLED || mode == ATA_DITER_ENABLED_REVERSE) &&
288 !ata_dev_enabled(dev))
294 * ata_dev_phys_link - find physical link for a device
295 * @dev: ATA device to look up physical link for
297 * Look up physical link which @dev is attached to. Note that
298 * this is different from @dev->link only when @dev is on slave
299 * link. For all other cases, it's the same as @dev->link.
305 * Pointer to the found physical link.
307 struct ata_link *ata_dev_phys_link(struct ata_device *dev)
309 struct ata_port *ap = dev->link->ap;
315 return ap->slave_link;
319 * ata_force_cbl - force cable type according to libata.force
320 * @ap: ATA port of interest
322 * Force cable type according to libata.force and whine about it.
323 * The last entry which has matching port number is used, so it
324 * can be specified as part of device force parameters. For
325 * example, both "a:40c,1.00:udma4" and "1.00:40c,udma4" have the
331 void ata_force_cbl(struct ata_port *ap)
335 for (i = ata_force_tbl_size - 1; i >= 0; i--) {
336 const struct ata_force_ent *fe = &ata_force_tbl[i];
338 if (fe->port != -1 && fe->port != ap->print_id)
341 if (fe->param.cbl == ATA_CBL_NONE)
344 ap->cbl = fe->param.cbl;
345 ata_port_notice(ap, "FORCE: cable set to %s\n", fe->param.name);
351 * ata_force_link_limits - force link limits according to libata.force
352 * @link: ATA link of interest
354 * Force link flags and SATA spd limit according to libata.force
355 * and whine about it. When only the port part is specified
356 * (e.g. 1:), the limit applies to all links connected to both
357 * the host link and all fan-out ports connected via PMP. If the
358 * device part is specified as 0 (e.g. 1.00:), it specifies the
359 * first fan-out link not the host link. Device number 15 always
360 * points to the host link whether PMP is attached or not. If the
361 * controller has slave link, device number 16 points to it.
366 static void ata_force_link_limits(struct ata_link *link)
368 bool did_spd = false;
369 int linkno = link->pmp;
372 if (ata_is_host_link(link))
375 for (i = ata_force_tbl_size - 1; i >= 0; i--) {
376 const struct ata_force_ent *fe = &ata_force_tbl[i];
378 if (fe->port != -1 && fe->port != link->ap->print_id)
381 if (fe->device != -1 && fe->device != linkno)
384 /* only honor the first spd limit */
385 if (!did_spd && fe->param.spd_limit) {
386 link->hw_sata_spd_limit = (1 << fe->param.spd_limit) - 1;
387 ata_link_notice(link, "FORCE: PHY spd limit set to %s\n",
392 /* let lflags stack */
393 if (fe->param.lflags) {
394 link->flags |= fe->param.lflags;
395 ata_link_notice(link,
396 "FORCE: link flag 0x%x forced -> 0x%x\n",
397 fe->param.lflags, link->flags);
403 * ata_force_xfermask - force xfermask according to libata.force
404 * @dev: ATA device of interest
406 * Force xfer_mask according to libata.force and whine about it.
407 * For consistency with link selection, device number 15 selects
408 * the first device connected to the host link.
413 static void ata_force_xfermask(struct ata_device *dev)
415 int devno = dev->link->pmp + dev->devno;
416 int alt_devno = devno;
419 /* allow n.15/16 for devices attached to host port */
420 if (ata_is_host_link(dev->link))
423 for (i = ata_force_tbl_size - 1; i >= 0; i--) {
424 const struct ata_force_ent *fe = &ata_force_tbl[i];
425 unsigned long pio_mask, mwdma_mask, udma_mask;
427 if (fe->port != -1 && fe->port != dev->link->ap->print_id)
430 if (fe->device != -1 && fe->device != devno &&
431 fe->device != alt_devno)
434 if (!fe->param.xfer_mask)
437 ata_unpack_xfermask(fe->param.xfer_mask,
438 &pio_mask, &mwdma_mask, &udma_mask);
440 dev->udma_mask = udma_mask;
441 else if (mwdma_mask) {
443 dev->mwdma_mask = mwdma_mask;
447 dev->pio_mask = pio_mask;
450 ata_dev_notice(dev, "FORCE: xfer_mask set to %s\n",
457 * ata_force_horkage - force horkage according to libata.force
458 * @dev: ATA device of interest
460 * Force horkage according to libata.force and whine about it.
461 * For consistency with link selection, device number 15 selects
462 * the first device connected to the host link.
467 static void ata_force_horkage(struct ata_device *dev)
469 int devno = dev->link->pmp + dev->devno;
470 int alt_devno = devno;
473 /* allow n.15/16 for devices attached to host port */
474 if (ata_is_host_link(dev->link))
477 for (i = 0; i < ata_force_tbl_size; i++) {
478 const struct ata_force_ent *fe = &ata_force_tbl[i];
480 if (fe->port != -1 && fe->port != dev->link->ap->print_id)
483 if (fe->device != -1 && fe->device != devno &&
484 fe->device != alt_devno)
487 if (!(~dev->horkage & fe->param.horkage_on) &&
488 !(dev->horkage & fe->param.horkage_off))
491 dev->horkage |= fe->param.horkage_on;
492 dev->horkage &= ~fe->param.horkage_off;
494 ata_dev_notice(dev, "FORCE: horkage modified (%s)\n",
500 * atapi_cmd_type - Determine ATAPI command type from SCSI opcode
501 * @opcode: SCSI opcode
503 * Determine ATAPI command type from @opcode.
509 * ATAPI_{READ|WRITE|READ_CD|PASS_THRU|MISC}
511 int atapi_cmd_type(u8 opcode)
520 case GPCMD_WRITE_AND_VERIFY_10:
524 case GPCMD_READ_CD_MSF:
525 return ATAPI_READ_CD;
529 if (atapi_passthru16)
530 return ATAPI_PASS_THRU;
538 * ata_tf_to_fis - Convert ATA taskfile to SATA FIS structure
539 * @tf: Taskfile to convert
540 * @pmp: Port multiplier port
541 * @is_cmd: This FIS is for command
542 * @fis: Buffer into which data will output
544 * Converts a standard ATA taskfile to a Serial ATA
545 * FIS structure (Register - Host to Device).
548 * Inherited from caller.
550 void ata_tf_to_fis(const struct ata_taskfile *tf, u8 pmp, int is_cmd, u8 *fis)
552 fis[0] = 0x27; /* Register - Host to Device FIS */
553 fis[1] = pmp & 0xf; /* Port multiplier number*/
555 fis[1] |= (1 << 7); /* bit 7 indicates Command FIS */
557 fis[2] = tf->command;
558 fis[3] = tf->feature;
565 fis[8] = tf->hob_lbal;
566 fis[9] = tf->hob_lbam;
567 fis[10] = tf->hob_lbah;
568 fis[11] = tf->hob_feature;
571 fis[13] = tf->hob_nsect;
575 fis[16] = tf->auxiliary & 0xff;
576 fis[17] = (tf->auxiliary >> 8) & 0xff;
577 fis[18] = (tf->auxiliary >> 16) & 0xff;
578 fis[19] = (tf->auxiliary >> 24) & 0xff;
582 * ata_tf_from_fis - Convert SATA FIS to ATA taskfile
583 * @fis: Buffer from which data will be input
584 * @tf: Taskfile to output
586 * Converts a serial ATA FIS structure to a standard ATA taskfile.
589 * Inherited from caller.
592 void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf)
594 tf->command = fis[2]; /* status */
595 tf->feature = fis[3]; /* error */
602 tf->hob_lbal = fis[8];
603 tf->hob_lbam = fis[9];
604 tf->hob_lbah = fis[10];
607 tf->hob_nsect = fis[13];
610 static const u8 ata_rw_cmds[] = {
614 ATA_CMD_READ_MULTI_EXT,
615 ATA_CMD_WRITE_MULTI_EXT,
619 ATA_CMD_WRITE_MULTI_FUA_EXT,
623 ATA_CMD_PIO_READ_EXT,
624 ATA_CMD_PIO_WRITE_EXT,
637 ATA_CMD_WRITE_FUA_EXT
641 * ata_rwcmd_protocol - set taskfile r/w commands and protocol
642 * @tf: command to examine and configure
643 * @dev: device tf belongs to
645 * Examine the device configuration and tf->flags to calculate
646 * the proper read/write commands and protocol to use.
651 static int ata_rwcmd_protocol(struct ata_taskfile *tf, struct ata_device *dev)
655 int index, fua, lba48, write;
657 fua = (tf->flags & ATA_TFLAG_FUA) ? 4 : 0;
658 lba48 = (tf->flags & ATA_TFLAG_LBA48) ? 2 : 0;
659 write = (tf->flags & ATA_TFLAG_WRITE) ? 1 : 0;
661 if (dev->flags & ATA_DFLAG_PIO) {
662 tf->protocol = ATA_PROT_PIO;
663 index = dev->multi_count ? 0 : 8;
664 } else if (lba48 && (dev->link->ap->flags & ATA_FLAG_PIO_LBA48)) {
665 /* Unable to use DMA due to host limitation */
666 tf->protocol = ATA_PROT_PIO;
667 index = dev->multi_count ? 0 : 8;
669 tf->protocol = ATA_PROT_DMA;
673 cmd = ata_rw_cmds[index + fua + lba48 + write];
682 * ata_tf_read_block - Read block address from ATA taskfile
683 * @tf: ATA taskfile of interest
684 * @dev: ATA device @tf belongs to
689 * Read block address from @tf. This function can handle all
690 * three address formats - LBA, LBA48 and CHS. tf->protocol and
691 * flags select the address format to use.
694 * Block address read from @tf.
696 u64 ata_tf_read_block(struct ata_taskfile *tf, struct ata_device *dev)
700 if (tf->flags & ATA_TFLAG_LBA) {
701 if (tf->flags & ATA_TFLAG_LBA48) {
702 block |= (u64)tf->hob_lbah << 40;
703 block |= (u64)tf->hob_lbam << 32;
704 block |= (u64)tf->hob_lbal << 24;
706 block |= (tf->device & 0xf) << 24;
708 block |= tf->lbah << 16;
709 block |= tf->lbam << 8;
714 cyl = tf->lbam | (tf->lbah << 8);
715 head = tf->device & 0xf;
720 "device reported invalid CHS sector 0\n");
721 sect = 1; /* oh well */
724 block = (cyl * dev->heads + head) * dev->sectors + sect - 1;
731 * ata_build_rw_tf - Build ATA taskfile for given read/write request
732 * @tf: Target ATA taskfile
733 * @dev: ATA device @tf belongs to
734 * @block: Block address
735 * @n_block: Number of blocks
736 * @tf_flags: RW/FUA etc...
742 * Build ATA taskfile @tf for read/write request described by
743 * @block, @n_block, @tf_flags and @tag on @dev.
747 * 0 on success, -ERANGE if the request is too large for @dev,
748 * -EINVAL if the request is invalid.
750 int ata_build_rw_tf(struct ata_taskfile *tf, struct ata_device *dev,
751 u64 block, u32 n_block, unsigned int tf_flags,
754 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
755 tf->flags |= tf_flags;
757 if (ata_ncq_enabled(dev) && likely(tag != ATA_TAG_INTERNAL)) {
759 if (!lba_48_ok(block, n_block))
762 tf->protocol = ATA_PROT_NCQ;
763 tf->flags |= ATA_TFLAG_LBA | ATA_TFLAG_LBA48;
765 if (tf->flags & ATA_TFLAG_WRITE)
766 tf->command = ATA_CMD_FPDMA_WRITE;
768 tf->command = ATA_CMD_FPDMA_READ;
770 tf->nsect = tag << 3;
771 tf->hob_feature = (n_block >> 8) & 0xff;
772 tf->feature = n_block & 0xff;
774 tf->hob_lbah = (block >> 40) & 0xff;
775 tf->hob_lbam = (block >> 32) & 0xff;
776 tf->hob_lbal = (block >> 24) & 0xff;
777 tf->lbah = (block >> 16) & 0xff;
778 tf->lbam = (block >> 8) & 0xff;
779 tf->lbal = block & 0xff;
781 tf->device = ATA_LBA;
782 if (tf->flags & ATA_TFLAG_FUA)
783 tf->device |= 1 << 7;
784 } else if (dev->flags & ATA_DFLAG_LBA) {
785 tf->flags |= ATA_TFLAG_LBA;
787 if (lba_28_ok(block, n_block)) {
789 tf->device |= (block >> 24) & 0xf;
790 } else if (lba_48_ok(block, n_block)) {
791 if (!(dev->flags & ATA_DFLAG_LBA48))
795 tf->flags |= ATA_TFLAG_LBA48;
797 tf->hob_nsect = (n_block >> 8) & 0xff;
799 tf->hob_lbah = (block >> 40) & 0xff;
800 tf->hob_lbam = (block >> 32) & 0xff;
801 tf->hob_lbal = (block >> 24) & 0xff;
803 /* request too large even for LBA48 */
806 if (unlikely(ata_rwcmd_protocol(tf, dev) < 0))
809 tf->nsect = n_block & 0xff;
811 tf->lbah = (block >> 16) & 0xff;
812 tf->lbam = (block >> 8) & 0xff;
813 tf->lbal = block & 0xff;
815 tf->device |= ATA_LBA;
818 u32 sect, head, cyl, track;
820 /* The request -may- be too large for CHS addressing. */
821 if (!lba_28_ok(block, n_block))
824 if (unlikely(ata_rwcmd_protocol(tf, dev) < 0))
827 /* Convert LBA to CHS */
828 track = (u32)block / dev->sectors;
829 cyl = track / dev->heads;
830 head = track % dev->heads;
831 sect = (u32)block % dev->sectors + 1;
833 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
834 (u32)block, track, cyl, head, sect);
836 /* Check whether the converted CHS can fit.
840 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
843 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
854 * ata_pack_xfermask - Pack pio, mwdma and udma masks into xfer_mask
855 * @pio_mask: pio_mask
856 * @mwdma_mask: mwdma_mask
857 * @udma_mask: udma_mask
859 * Pack @pio_mask, @mwdma_mask and @udma_mask into a single
860 * unsigned int xfer_mask.
868 unsigned long ata_pack_xfermask(unsigned long pio_mask,
869 unsigned long mwdma_mask,
870 unsigned long udma_mask)
872 return ((pio_mask << ATA_SHIFT_PIO) & ATA_MASK_PIO) |
873 ((mwdma_mask << ATA_SHIFT_MWDMA) & ATA_MASK_MWDMA) |
874 ((udma_mask << ATA_SHIFT_UDMA) & ATA_MASK_UDMA);
878 * ata_unpack_xfermask - Unpack xfer_mask into pio, mwdma and udma masks
879 * @xfer_mask: xfer_mask to unpack
880 * @pio_mask: resulting pio_mask
881 * @mwdma_mask: resulting mwdma_mask
882 * @udma_mask: resulting udma_mask
884 * Unpack @xfer_mask into @pio_mask, @mwdma_mask and @udma_mask.
885 * Any NULL distination masks will be ignored.
887 void ata_unpack_xfermask(unsigned long xfer_mask, unsigned long *pio_mask,
888 unsigned long *mwdma_mask, unsigned long *udma_mask)
891 *pio_mask = (xfer_mask & ATA_MASK_PIO) >> ATA_SHIFT_PIO;
893 *mwdma_mask = (xfer_mask & ATA_MASK_MWDMA) >> ATA_SHIFT_MWDMA;
895 *udma_mask = (xfer_mask & ATA_MASK_UDMA) >> ATA_SHIFT_UDMA;
898 static const struct ata_xfer_ent {
902 { ATA_SHIFT_PIO, ATA_NR_PIO_MODES, XFER_PIO_0 },
903 { ATA_SHIFT_MWDMA, ATA_NR_MWDMA_MODES, XFER_MW_DMA_0 },
904 { ATA_SHIFT_UDMA, ATA_NR_UDMA_MODES, XFER_UDMA_0 },
909 * ata_xfer_mask2mode - Find matching XFER_* for the given xfer_mask
910 * @xfer_mask: xfer_mask of interest
912 * Return matching XFER_* value for @xfer_mask. Only the highest
913 * bit of @xfer_mask is considered.
919 * Matching XFER_* value, 0xff if no match found.
921 u8 ata_xfer_mask2mode(unsigned long xfer_mask)
923 int highbit = fls(xfer_mask) - 1;
924 const struct ata_xfer_ent *ent;
926 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
927 if (highbit >= ent->shift && highbit < ent->shift + ent->bits)
928 return ent->base + highbit - ent->shift;
933 * ata_xfer_mode2mask - Find matching xfer_mask for XFER_*
934 * @xfer_mode: XFER_* of interest
936 * Return matching xfer_mask for @xfer_mode.
942 * Matching xfer_mask, 0 if no match found.
944 unsigned long ata_xfer_mode2mask(u8 xfer_mode)
946 const struct ata_xfer_ent *ent;
948 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
949 if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits)
950 return ((2 << (ent->shift + xfer_mode - ent->base)) - 1)
951 & ~((1 << ent->shift) - 1);
956 * ata_xfer_mode2shift - Find matching xfer_shift for XFER_*
957 * @xfer_mode: XFER_* of interest
959 * Return matching xfer_shift for @xfer_mode.
965 * Matching xfer_shift, -1 if no match found.
967 int ata_xfer_mode2shift(unsigned long xfer_mode)
969 const struct ata_xfer_ent *ent;
971 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
972 if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits)
978 * ata_mode_string - convert xfer_mask to string
979 * @xfer_mask: mask of bits supported; only highest bit counts.
981 * Determine string which represents the highest speed
982 * (highest bit in @modemask).
988 * Constant C string representing highest speed listed in
989 * @mode_mask, or the constant C string "<n/a>".
991 const char *ata_mode_string(unsigned long xfer_mask)
993 static const char * const xfer_mode_str[] = {
1017 highbit = fls(xfer_mask) - 1;
1018 if (highbit >= 0 && highbit < ARRAY_SIZE(xfer_mode_str))
1019 return xfer_mode_str[highbit];
1023 const char *sata_spd_string(unsigned int spd)
1025 static const char * const spd_str[] = {
1031 if (spd == 0 || (spd - 1) >= ARRAY_SIZE(spd_str))
1033 return spd_str[spd - 1];
1037 * ata_dev_classify - determine device type based on ATA-spec signature
1038 * @tf: ATA taskfile register set for device to be identified
1040 * Determine from taskfile register contents whether a device is
1041 * ATA or ATAPI, as per "Signature and persistence" section
1042 * of ATA/PI spec (volume 1, sect 5.14).
1048 * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, %ATA_DEV_PMP,
1049 * %ATA_DEV_ZAC, or %ATA_DEV_UNKNOWN the event of failure.
1051 unsigned int ata_dev_classify(const struct ata_taskfile *tf)
1053 /* Apple's open source Darwin code hints that some devices only
1054 * put a proper signature into the LBA mid/high registers,
1055 * So, we only check those. It's sufficient for uniqueness.
1057 * ATA/ATAPI-7 (d1532v1r1: Feb. 19, 2003) specified separate
1058 * signatures for ATA and ATAPI devices attached on SerialATA,
1059 * 0x3c/0xc3 and 0x69/0x96 respectively. However, SerialATA
1060 * spec has never mentioned about using different signatures
1061 * for ATA/ATAPI devices. Then, Serial ATA II: Port
1062 * Multiplier specification began to use 0x69/0x96 to identify
1063 * port multpliers and 0x3c/0xc3 to identify SEMB device.
1064 * ATA/ATAPI-7 dropped descriptions about 0x3c/0xc3 and
1065 * 0x69/0x96 shortly and described them as reserved for
1068 * We follow the current spec and consider that 0x69/0x96
1069 * identifies a port multiplier and 0x3c/0xc3 a SEMB device.
1070 * Unfortunately, WDC WD1600JS-62MHB5 (a hard drive) reports
1071 * SEMB signature. This is worked around in
1072 * ata_dev_read_id().
1074 if ((tf->lbam == 0) && (tf->lbah == 0)) {
1075 DPRINTK("found ATA device by sig\n");
1079 if ((tf->lbam == 0x14) && (tf->lbah == 0xeb)) {
1080 DPRINTK("found ATAPI device by sig\n");
1081 return ATA_DEV_ATAPI;
1084 if ((tf->lbam == 0x69) && (tf->lbah == 0x96)) {
1085 DPRINTK("found PMP device by sig\n");
1089 if ((tf->lbam == 0x3c) && (tf->lbah == 0xc3)) {
1090 DPRINTK("found SEMB device by sig (could be ATA device)\n");
1091 return ATA_DEV_SEMB;
1094 if ((tf->lbam == 0xcd) && (tf->lbah == 0xab)) {
1095 DPRINTK("found ZAC device by sig\n");
1099 DPRINTK("unknown device\n");
1100 return ATA_DEV_UNKNOWN;
1104 * ata_id_string - Convert IDENTIFY DEVICE page into string
1105 * @id: IDENTIFY DEVICE results we will examine
1106 * @s: string into which data is output
1107 * @ofs: offset into identify device page
1108 * @len: length of string to return. must be an even number.
1110 * The strings in the IDENTIFY DEVICE page are broken up into
1111 * 16-bit chunks. Run through the string, and output each
1112 * 8-bit chunk linearly, regardless of platform.
1118 void ata_id_string(const u16 *id, unsigned char *s,
1119 unsigned int ofs, unsigned int len)
1140 * ata_id_c_string - Convert IDENTIFY DEVICE page into C string
1141 * @id: IDENTIFY DEVICE results we will examine
1142 * @s: string into which data is output
1143 * @ofs: offset into identify device page
1144 * @len: length of string to return. must be an odd number.
1146 * This function is identical to ata_id_string except that it
1147 * trims trailing spaces and terminates the resulting string with
1148 * null. @len must be actual maximum length (even number) + 1.
1153 void ata_id_c_string(const u16 *id, unsigned char *s,
1154 unsigned int ofs, unsigned int len)
1158 ata_id_string(id, s, ofs, len - 1);
1160 p = s + strnlen(s, len - 1);
1161 while (p > s && p[-1] == ' ')
1166 static u64 ata_id_n_sectors(const u16 *id)
1168 if (ata_id_has_lba(id)) {
1169 if (ata_id_has_lba48(id))
1170 return ata_id_u64(id, ATA_ID_LBA_CAPACITY_2);
1172 return ata_id_u32(id, ATA_ID_LBA_CAPACITY);
1174 if (ata_id_current_chs_valid(id))
1175 return id[ATA_ID_CUR_CYLS] * id[ATA_ID_CUR_HEADS] *
1176 id[ATA_ID_CUR_SECTORS];
1178 return id[ATA_ID_CYLS] * id[ATA_ID_HEADS] *
1183 u64 ata_tf_to_lba48(const struct ata_taskfile *tf)
1187 sectors |= ((u64)(tf->hob_lbah & 0xff)) << 40;
1188 sectors |= ((u64)(tf->hob_lbam & 0xff)) << 32;
1189 sectors |= ((u64)(tf->hob_lbal & 0xff)) << 24;
1190 sectors |= (tf->lbah & 0xff) << 16;
1191 sectors |= (tf->lbam & 0xff) << 8;
1192 sectors |= (tf->lbal & 0xff);
1197 u64 ata_tf_to_lba(const struct ata_taskfile *tf)
1201 sectors |= (tf->device & 0x0f) << 24;
1202 sectors |= (tf->lbah & 0xff) << 16;
1203 sectors |= (tf->lbam & 0xff) << 8;
1204 sectors |= (tf->lbal & 0xff);
1210 * ata_read_native_max_address - Read native max address
1211 * @dev: target device
1212 * @max_sectors: out parameter for the result native max address
1214 * Perform an LBA48 or LBA28 native size query upon the device in
1218 * 0 on success, -EACCES if command is aborted by the drive.
1219 * -EIO on other errors.
1221 static int ata_read_native_max_address(struct ata_device *dev, u64 *max_sectors)
1223 unsigned int err_mask;
1224 struct ata_taskfile tf;
1225 int lba48 = ata_id_has_lba48(dev->id);
1227 ata_tf_init(dev, &tf);
1229 /* always clear all address registers */
1230 tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
1233 tf.command = ATA_CMD_READ_NATIVE_MAX_EXT;
1234 tf.flags |= ATA_TFLAG_LBA48;
1236 tf.command = ATA_CMD_READ_NATIVE_MAX;
1238 tf.protocol |= ATA_PROT_NODATA;
1239 tf.device |= ATA_LBA;
1241 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
1244 "failed to read native max address (err_mask=0x%x)\n",
1246 if (err_mask == AC_ERR_DEV && (tf.feature & ATA_ABORTED))
1252 *max_sectors = ata_tf_to_lba48(&tf) + 1;
1254 *max_sectors = ata_tf_to_lba(&tf) + 1;
1255 if (dev->horkage & ATA_HORKAGE_HPA_SIZE)
1261 * ata_set_max_sectors - Set max sectors
1262 * @dev: target device
1263 * @new_sectors: new max sectors value to set for the device
1265 * Set max sectors of @dev to @new_sectors.
1268 * 0 on success, -EACCES if command is aborted or denied (due to
1269 * previous non-volatile SET_MAX) by the drive. -EIO on other
1272 static int ata_set_max_sectors(struct ata_device *dev, u64 new_sectors)
1274 unsigned int err_mask;
1275 struct ata_taskfile tf;
1276 int lba48 = ata_id_has_lba48(dev->id);
1280 ata_tf_init(dev, &tf);
1282 tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
1285 tf.command = ATA_CMD_SET_MAX_EXT;
1286 tf.flags |= ATA_TFLAG_LBA48;
1288 tf.hob_lbal = (new_sectors >> 24) & 0xff;
1289 tf.hob_lbam = (new_sectors >> 32) & 0xff;
1290 tf.hob_lbah = (new_sectors >> 40) & 0xff;
1292 tf.command = ATA_CMD_SET_MAX;
1294 tf.device |= (new_sectors >> 24) & 0xf;
1297 tf.protocol |= ATA_PROT_NODATA;
1298 tf.device |= ATA_LBA;
1300 tf.lbal = (new_sectors >> 0) & 0xff;
1301 tf.lbam = (new_sectors >> 8) & 0xff;
1302 tf.lbah = (new_sectors >> 16) & 0xff;
1304 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
1307 "failed to set max address (err_mask=0x%x)\n",
1309 if (err_mask == AC_ERR_DEV &&
1310 (tf.feature & (ATA_ABORTED | ATA_IDNF)))
1319 * ata_hpa_resize - Resize a device with an HPA set
1320 * @dev: Device to resize
1322 * Read the size of an LBA28 or LBA48 disk with HPA features and resize
1323 * it if required to the full size of the media. The caller must check
1324 * the drive has the HPA feature set enabled.
1327 * 0 on success, -errno on failure.
1329 static int ata_hpa_resize(struct ata_device *dev)
1331 struct ata_eh_context *ehc = &dev->link->eh_context;
1332 int print_info = ehc->i.flags & ATA_EHI_PRINTINFO;
1333 bool unlock_hpa = ata_ignore_hpa || dev->flags & ATA_DFLAG_UNLOCK_HPA;
1334 u64 sectors = ata_id_n_sectors(dev->id);
1338 /* do we need to do it? */
1339 if ((dev->class != ATA_DEV_ATA && dev->class != ATA_DEV_ZAC) ||
1340 !ata_id_has_lba(dev->id) || !ata_id_hpa_enabled(dev->id) ||
1341 (dev->horkage & ATA_HORKAGE_BROKEN_HPA))
1344 /* read native max address */
1345 rc = ata_read_native_max_address(dev, &native_sectors);
1347 /* If device aborted the command or HPA isn't going to
1348 * be unlocked, skip HPA resizing.
1350 if (rc == -EACCES || !unlock_hpa) {
1352 "HPA support seems broken, skipping HPA handling\n");
1353 dev->horkage |= ATA_HORKAGE_BROKEN_HPA;
1355 /* we can continue if device aborted the command */
1362 dev->n_native_sectors = native_sectors;
1364 /* nothing to do? */
1365 if (native_sectors <= sectors || !unlock_hpa) {
1366 if (!print_info || native_sectors == sectors)
1369 if (native_sectors > sectors)
1371 "HPA detected: current %llu, native %llu\n",
1372 (unsigned long long)sectors,
1373 (unsigned long long)native_sectors);
1374 else if (native_sectors < sectors)
1376 "native sectors (%llu) is smaller than sectors (%llu)\n",
1377 (unsigned long long)native_sectors,
1378 (unsigned long long)sectors);
1382 /* let's unlock HPA */
1383 rc = ata_set_max_sectors(dev, native_sectors);
1384 if (rc == -EACCES) {
1385 /* if device aborted the command, skip HPA resizing */
1387 "device aborted resize (%llu -> %llu), skipping HPA handling\n",
1388 (unsigned long long)sectors,
1389 (unsigned long long)native_sectors);
1390 dev->horkage |= ATA_HORKAGE_BROKEN_HPA;
1395 /* re-read IDENTIFY data */
1396 rc = ata_dev_reread_id(dev, 0);
1399 "failed to re-read IDENTIFY data after HPA resizing\n");
1404 u64 new_sectors = ata_id_n_sectors(dev->id);
1406 "HPA unlocked: %llu -> %llu, native %llu\n",
1407 (unsigned long long)sectors,
1408 (unsigned long long)new_sectors,
1409 (unsigned long long)native_sectors);
1416 * ata_dump_id - IDENTIFY DEVICE info debugging output
1417 * @id: IDENTIFY DEVICE page to dump
1419 * Dump selected 16-bit words from the given IDENTIFY DEVICE
1426 static inline void ata_dump_id(const u16 *id)
1428 DPRINTK("49==0x%04x "
1438 DPRINTK("80==0x%04x "
1448 DPRINTK("88==0x%04x "
1455 * ata_id_xfermask - Compute xfermask from the given IDENTIFY data
1456 * @id: IDENTIFY data to compute xfer mask from
1458 * Compute the xfermask for this device. This is not as trivial
1459 * as it seems if we must consider early devices correctly.
1461 * FIXME: pre IDE drive timing (do we care ?).
1469 unsigned long ata_id_xfermask(const u16 *id)
1471 unsigned long pio_mask, mwdma_mask, udma_mask;
1473 /* Usual case. Word 53 indicates word 64 is valid */
1474 if (id[ATA_ID_FIELD_VALID] & (1 << 1)) {
1475 pio_mask = id[ATA_ID_PIO_MODES] & 0x03;
1479 /* If word 64 isn't valid then Word 51 high byte holds
1480 * the PIO timing number for the maximum. Turn it into
1483 u8 mode = (id[ATA_ID_OLD_PIO_MODES] >> 8) & 0xFF;
1484 if (mode < 5) /* Valid PIO range */
1485 pio_mask = (2 << mode) - 1;
1489 /* But wait.. there's more. Design your standards by
1490 * committee and you too can get a free iordy field to
1491 * process. However its the speeds not the modes that
1492 * are supported... Note drivers using the timing API
1493 * will get this right anyway
1497 mwdma_mask = id[ATA_ID_MWDMA_MODES] & 0x07;
1499 if (ata_id_is_cfa(id)) {
1501 * Process compact flash extended modes
1503 int pio = (id[ATA_ID_CFA_MODES] >> 0) & 0x7;
1504 int dma = (id[ATA_ID_CFA_MODES] >> 3) & 0x7;
1507 pio_mask |= (1 << 5);
1509 pio_mask |= (1 << 6);
1511 mwdma_mask |= (1 << 3);
1513 mwdma_mask |= (1 << 4);
1517 if (id[ATA_ID_FIELD_VALID] & (1 << 2))
1518 udma_mask = id[ATA_ID_UDMA_MODES] & 0xff;
1520 return ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask);
1523 static void ata_qc_complete_internal(struct ata_queued_cmd *qc)
1525 struct completion *waiting = qc->private_data;
1531 * ata_exec_internal_sg - execute libata internal command
1532 * @dev: Device to which the command is sent
1533 * @tf: Taskfile registers for the command and the result
1534 * @cdb: CDB for packet command
1535 * @dma_dir: Data transfer direction of the command
1536 * @sgl: sg list for the data buffer of the command
1537 * @n_elem: Number of sg entries
1538 * @timeout: Timeout in msecs (0 for default)
1540 * Executes libata internal command with timeout. @tf contains
1541 * command on entry and result on return. Timeout and error
1542 * conditions are reported via return value. No recovery action
1543 * is taken after a command times out. It's caller's duty to
1544 * clean up after timeout.
1547 * None. Should be called with kernel context, might sleep.
1550 * Zero on success, AC_ERR_* mask on failure
1552 unsigned ata_exec_internal_sg(struct ata_device *dev,
1553 struct ata_taskfile *tf, const u8 *cdb,
1554 int dma_dir, struct scatterlist *sgl,
1555 unsigned int n_elem, unsigned long timeout)
1557 struct ata_link *link = dev->link;
1558 struct ata_port *ap = link->ap;
1559 u8 command = tf->command;
1560 int auto_timeout = 0;
1561 struct ata_queued_cmd *qc;
1562 unsigned int tag, preempted_tag;
1563 u32 preempted_sactive, preempted_qc_active;
1564 int preempted_nr_active_links;
1565 DECLARE_COMPLETION_ONSTACK(wait);
1566 unsigned long flags;
1567 unsigned int err_mask;
1570 spin_lock_irqsave(ap->lock, flags);
1572 /* no internal command while frozen */
1573 if (ap->pflags & ATA_PFLAG_FROZEN) {
1574 spin_unlock_irqrestore(ap->lock, flags);
1575 return AC_ERR_SYSTEM;
1578 /* initialize internal qc */
1580 /* XXX: Tag 0 is used for drivers with legacy EH as some
1581 * drivers choke if any other tag is given. This breaks
1582 * ata_tag_internal() test for those drivers. Don't use new
1583 * EH stuff without converting to it.
1585 if (ap->ops->error_handler)
1586 tag = ATA_TAG_INTERNAL;
1590 qc = __ata_qc_from_tag(ap, tag);
1598 preempted_tag = link->active_tag;
1599 preempted_sactive = link->sactive;
1600 preempted_qc_active = ap->qc_active;
1601 preempted_nr_active_links = ap->nr_active_links;
1602 link->active_tag = ATA_TAG_POISON;
1605 ap->nr_active_links = 0;
1607 /* prepare & issue qc */
1610 memcpy(qc->cdb, cdb, ATAPI_CDB_LEN);
1612 /* some SATA bridges need us to indicate data xfer direction */
1613 if (tf->protocol == ATAPI_PROT_DMA && (dev->flags & ATA_DFLAG_DMADIR) &&
1614 dma_dir == DMA_FROM_DEVICE)
1615 qc->tf.feature |= ATAPI_DMADIR;
1617 qc->flags |= ATA_QCFLAG_RESULT_TF;
1618 qc->dma_dir = dma_dir;
1619 if (dma_dir != DMA_NONE) {
1620 unsigned int i, buflen = 0;
1621 struct scatterlist *sg;
1623 for_each_sg(sgl, sg, n_elem, i)
1624 buflen += sg->length;
1626 ata_sg_init(qc, sgl, n_elem);
1627 qc->nbytes = buflen;
1630 qc->private_data = &wait;
1631 qc->complete_fn = ata_qc_complete_internal;
1635 spin_unlock_irqrestore(ap->lock, flags);
1638 if (ata_probe_timeout)
1639 timeout = ata_probe_timeout * 1000;
1641 timeout = ata_internal_cmd_timeout(dev, command);
1646 if (ap->ops->error_handler)
1649 rc = wait_for_completion_timeout(&wait, msecs_to_jiffies(timeout));
1651 if (ap->ops->error_handler)
1654 ata_sff_flush_pio_task(ap);
1657 spin_lock_irqsave(ap->lock, flags);
1659 /* We're racing with irq here. If we lose, the
1660 * following test prevents us from completing the qc
1661 * twice. If we win, the port is frozen and will be
1662 * cleaned up by ->post_internal_cmd().
1664 if (qc->flags & ATA_QCFLAG_ACTIVE) {
1665 qc->err_mask |= AC_ERR_TIMEOUT;
1667 if (ap->ops->error_handler)
1668 ata_port_freeze(ap);
1670 ata_qc_complete(qc);
1672 if (ata_msg_warn(ap))
1673 ata_dev_warn(dev, "qc timeout (cmd 0x%x)\n",
1677 spin_unlock_irqrestore(ap->lock, flags);
1680 /* do post_internal_cmd */
1681 if (ap->ops->post_internal_cmd)
1682 ap->ops->post_internal_cmd(qc);
1684 /* perform minimal error analysis */
1685 if (qc->flags & ATA_QCFLAG_FAILED) {
1686 if (qc->result_tf.command & (ATA_ERR | ATA_DF))
1687 qc->err_mask |= AC_ERR_DEV;
1690 qc->err_mask |= AC_ERR_OTHER;
1692 if (qc->err_mask & ~AC_ERR_OTHER)
1693 qc->err_mask &= ~AC_ERR_OTHER;
1697 spin_lock_irqsave(ap->lock, flags);
1699 *tf = qc->result_tf;
1700 err_mask = qc->err_mask;
1703 link->active_tag = preempted_tag;
1704 link->sactive = preempted_sactive;
1705 ap->qc_active = preempted_qc_active;
1706 ap->nr_active_links = preempted_nr_active_links;
1708 spin_unlock_irqrestore(ap->lock, flags);
1710 if ((err_mask & AC_ERR_TIMEOUT) && auto_timeout)
1711 ata_internal_cmd_timed_out(dev, command);
1717 * ata_exec_internal - execute libata internal command
1718 * @dev: Device to which the command is sent
1719 * @tf: Taskfile registers for the command and the result
1720 * @cdb: CDB for packet command
1721 * @dma_dir: Data transfer direction of the command
1722 * @buf: Data buffer of the command
1723 * @buflen: Length of data buffer
1724 * @timeout: Timeout in msecs (0 for default)
1726 * Wrapper around ata_exec_internal_sg() which takes simple
1727 * buffer instead of sg list.
1730 * None. Should be called with kernel context, might sleep.
1733 * Zero on success, AC_ERR_* mask on failure
1735 unsigned ata_exec_internal(struct ata_device *dev,
1736 struct ata_taskfile *tf, const u8 *cdb,
1737 int dma_dir, void *buf, unsigned int buflen,
1738 unsigned long timeout)
1740 struct scatterlist *psg = NULL, sg;
1741 unsigned int n_elem = 0;
1743 if (dma_dir != DMA_NONE) {
1745 sg_init_one(&sg, buf, buflen);
1750 return ata_exec_internal_sg(dev, tf, cdb, dma_dir, psg, n_elem,
1755 * ata_pio_need_iordy - check if iordy needed
1758 * Check if the current speed of the device requires IORDY. Used
1759 * by various controllers for chip configuration.
1761 unsigned int ata_pio_need_iordy(const struct ata_device *adev)
1763 /* Don't set IORDY if we're preparing for reset. IORDY may
1764 * lead to controller lock up on certain controllers if the
1765 * port is not occupied. See bko#11703 for details.
1767 if (adev->link->ap->pflags & ATA_PFLAG_RESETTING)
1769 /* Controller doesn't support IORDY. Probably a pointless
1770 * check as the caller should know this.
1772 if (adev->link->ap->flags & ATA_FLAG_NO_IORDY)
1774 /* CF spec. r4.1 Table 22 says no iordy on PIO5 and PIO6. */
1775 if (ata_id_is_cfa(adev->id)
1776 && (adev->pio_mode == XFER_PIO_5 || adev->pio_mode == XFER_PIO_6))
1778 /* PIO3 and higher it is mandatory */
1779 if (adev->pio_mode > XFER_PIO_2)
1781 /* We turn it on when possible */
1782 if (ata_id_has_iordy(adev->id))
1788 * ata_pio_mask_no_iordy - Return the non IORDY mask
1791 * Compute the highest mode possible if we are not using iordy. Return
1792 * -1 if no iordy mode is available.
1794 static u32 ata_pio_mask_no_iordy(const struct ata_device *adev)
1796 /* If we have no drive specific rule, then PIO 2 is non IORDY */
1797 if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE */
1798 u16 pio = adev->id[ATA_ID_EIDE_PIO];
1799 /* Is the speed faster than the drive allows non IORDY ? */
1801 /* This is cycle times not frequency - watch the logic! */
1802 if (pio > 240) /* PIO2 is 240nS per cycle */
1803 return 3 << ATA_SHIFT_PIO;
1804 return 7 << ATA_SHIFT_PIO;
1807 return 3 << ATA_SHIFT_PIO;
1811 * ata_do_dev_read_id - default ID read method
1813 * @tf: proposed taskfile
1816 * Issue the identify taskfile and hand back the buffer containing
1817 * identify data. For some RAID controllers and for pre ATA devices
1818 * this function is wrapped or replaced by the driver
1820 unsigned int ata_do_dev_read_id(struct ata_device *dev,
1821 struct ata_taskfile *tf, u16 *id)
1823 return ata_exec_internal(dev, tf, NULL, DMA_FROM_DEVICE,
1824 id, sizeof(id[0]) * ATA_ID_WORDS, 0);
1828 * ata_dev_read_id - Read ID data from the specified device
1829 * @dev: target device
1830 * @p_class: pointer to class of the target device (may be changed)
1831 * @flags: ATA_READID_* flags
1832 * @id: buffer to read IDENTIFY data into
1834 * Read ID data from the specified device. ATA_CMD_ID_ATA is
1835 * performed on ATA devices and ATA_CMD_ID_ATAPI on ATAPI
1836 * devices. This function also issues ATA_CMD_INIT_DEV_PARAMS
1837 * for pre-ATA4 drives.
1839 * FIXME: ATA_CMD_ID_ATA is optional for early drives and right
1840 * now we abort if we hit that case.
1843 * Kernel thread context (may sleep)
1846 * 0 on success, -errno otherwise.
1848 int ata_dev_read_id(struct ata_device *dev, unsigned int *p_class,
1849 unsigned int flags, u16 *id)
1851 struct ata_port *ap = dev->link->ap;
1852 unsigned int class = *p_class;
1853 struct ata_taskfile tf;
1854 unsigned int err_mask = 0;
1856 bool is_semb = class == ATA_DEV_SEMB;
1857 int may_fallback = 1, tried_spinup = 0;
1860 if (ata_msg_ctl(ap))
1861 ata_dev_dbg(dev, "%s: ENTER\n", __func__);
1864 ata_tf_init(dev, &tf);
1868 class = ATA_DEV_ATA; /* some hard drives report SEMB sig */
1871 tf.command = ATA_CMD_ID_ATA;
1874 tf.command = ATA_CMD_ID_ATAPI;
1878 reason = "unsupported class";
1882 tf.protocol = ATA_PROT_PIO;
1884 /* Some devices choke if TF registers contain garbage. Make
1885 * sure those are properly initialized.
1887 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
1889 /* Device presence detection is unreliable on some
1890 * controllers. Always poll IDENTIFY if available.
1892 tf.flags |= ATA_TFLAG_POLLING;
1894 if (ap->ops->read_id)
1895 err_mask = ap->ops->read_id(dev, &tf, id);
1897 err_mask = ata_do_dev_read_id(dev, &tf, id);
1900 if (err_mask & AC_ERR_NODEV_HINT) {
1901 ata_dev_dbg(dev, "NODEV after polling detection\n");
1907 "IDENTIFY failed on device w/ SEMB sig, disabled\n");
1908 /* SEMB is not supported yet */
1909 *p_class = ATA_DEV_SEMB_UNSUP;
1913 if ((err_mask == AC_ERR_DEV) && (tf.feature & ATA_ABORTED)) {
1914 /* Device or controller might have reported
1915 * the wrong device class. Give a shot at the
1916 * other IDENTIFY if the current one is
1917 * aborted by the device.
1922 if (class == ATA_DEV_ATA)
1923 class = ATA_DEV_ATAPI;
1925 class = ATA_DEV_ATA;
1929 /* Control reaches here iff the device aborted
1930 * both flavors of IDENTIFYs which happens
1931 * sometimes with phantom devices.
1934 "both IDENTIFYs aborted, assuming NODEV\n");
1939 reason = "I/O error";
1943 if (dev->horkage & ATA_HORKAGE_DUMP_ID) {
1944 ata_dev_dbg(dev, "dumping IDENTIFY data, "
1945 "class=%d may_fallback=%d tried_spinup=%d\n",
1946 class, may_fallback, tried_spinup);
1947 print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET,
1948 16, 2, id, ATA_ID_WORDS * sizeof(*id), true);
1951 /* Falling back doesn't make sense if ID data was read
1952 * successfully at least once.
1956 swap_buf_le16(id, ATA_ID_WORDS);
1960 reason = "device reports invalid type";
1962 if (class == ATA_DEV_ATA || class == ATA_DEV_ZAC) {
1963 if (!ata_id_is_ata(id) && !ata_id_is_cfa(id))
1965 if (ap->host->flags & ATA_HOST_IGNORE_ATA &&
1966 ata_id_is_ata(id)) {
1968 "host indicates ignore ATA devices, ignored\n");
1972 if (ata_id_is_ata(id))
1976 if (!tried_spinup && (id[2] == 0x37c8 || id[2] == 0x738c)) {
1979 * Drive powered-up in standby mode, and requires a specific
1980 * SET_FEATURES spin-up subcommand before it will accept
1981 * anything other than the original IDENTIFY command.
1983 err_mask = ata_dev_set_feature(dev, SETFEATURES_SPINUP, 0);
1984 if (err_mask && id[2] != 0x738c) {
1986 reason = "SPINUP failed";
1990 * If the drive initially returned incomplete IDENTIFY info,
1991 * we now must reissue the IDENTIFY command.
1993 if (id[2] == 0x37c8)
1997 if ((flags & ATA_READID_POSTRESET) &&
1998 (class == ATA_DEV_ATA || class == ATA_DEV_ZAC)) {
2000 * The exact sequence expected by certain pre-ATA4 drives is:
2002 * IDENTIFY (optional in early ATA)
2003 * INITIALIZE DEVICE PARAMETERS (later IDE and ATA)
2005 * Some drives were very specific about that exact sequence.
2007 * Note that ATA4 says lba is mandatory so the second check
2008 * should never trigger.
2010 if (ata_id_major_version(id) < 4 || !ata_id_has_lba(id)) {
2011 err_mask = ata_dev_init_params(dev, id[3], id[6]);
2014 reason = "INIT_DEV_PARAMS failed";
2018 /* current CHS translation info (id[53-58]) might be
2019 * changed. reread the identify device info.
2021 flags &= ~ATA_READID_POSTRESET;
2031 if (ata_msg_warn(ap))
2032 ata_dev_warn(dev, "failed to IDENTIFY (%s, err_mask=0x%x)\n",
2037 static int ata_do_link_spd_horkage(struct ata_device *dev)
2039 struct ata_link *plink = ata_dev_phys_link(dev);
2040 u32 target, target_limit;
2042 if (!sata_scr_valid(plink))
2045 if (dev->horkage & ATA_HORKAGE_1_5_GBPS)
2050 target_limit = (1 << target) - 1;
2052 /* if already on stricter limit, no need to push further */
2053 if (plink->sata_spd_limit <= target_limit)
2056 plink->sata_spd_limit = target_limit;
2058 /* Request another EH round by returning -EAGAIN if link is
2059 * going faster than the target speed. Forward progress is
2060 * guaranteed by setting sata_spd_limit to target_limit above.
2062 if (plink->sata_spd > target) {
2063 ata_dev_info(dev, "applying link speed limit horkage to %s\n",
2064 sata_spd_string(target));
2070 static inline u8 ata_dev_knobble(struct ata_device *dev)
2072 struct ata_port *ap = dev->link->ap;
2074 if (ata_dev_blacklisted(dev) & ATA_HORKAGE_BRIDGE_OK)
2077 return ((ap->cbl == ATA_CBL_SATA) && (!ata_id_is_sata(dev->id)));
2080 static int ata_dev_config_ncq(struct ata_device *dev,
2081 char *desc, size_t desc_sz)
2083 struct ata_port *ap = dev->link->ap;
2084 int hdepth = 0, ddepth = ata_id_queue_depth(dev->id);
2085 unsigned int err_mask;
2088 if (!ata_id_has_ncq(dev->id)) {
2092 if (dev->horkage & ATA_HORKAGE_NONCQ) {
2093 snprintf(desc, desc_sz, "NCQ (not used)");
2096 if (ap->flags & ATA_FLAG_NCQ) {
2097 hdepth = min(ap->scsi_host->can_queue, ATA_MAX_QUEUE - 1);
2098 dev->flags |= ATA_DFLAG_NCQ;
2101 if (!(dev->horkage & ATA_HORKAGE_BROKEN_FPDMA_AA) &&
2102 (ap->flags & ATA_FLAG_FPDMA_AA) &&
2103 ata_id_has_fpdma_aa(dev->id)) {
2104 err_mask = ata_dev_set_feature(dev, SETFEATURES_SATA_ENABLE,
2108 "failed to enable AA (error_mask=0x%x)\n",
2110 if (err_mask != AC_ERR_DEV) {
2111 dev->horkage |= ATA_HORKAGE_BROKEN_FPDMA_AA;
2118 if (hdepth >= ddepth)
2119 snprintf(desc, desc_sz, "NCQ (depth %d)%s", ddepth, aa_desc);
2121 snprintf(desc, desc_sz, "NCQ (depth %d/%d)%s", hdepth,
2124 if ((ap->flags & ATA_FLAG_FPDMA_AUX) &&
2125 ata_id_has_ncq_send_and_recv(dev->id)) {
2126 err_mask = ata_read_log_page(dev, ATA_LOG_NCQ_SEND_RECV,
2127 0, ap->sector_buf, 1);
2130 "failed to get NCQ Send/Recv Log Emask 0x%x\n",
2133 u8 *cmds = dev->ncq_send_recv_cmds;
2135 dev->flags |= ATA_DFLAG_NCQ_SEND_RECV;
2136 memcpy(cmds, ap->sector_buf, ATA_LOG_NCQ_SEND_RECV_SIZE);
2138 if (dev->horkage & ATA_HORKAGE_NO_NCQ_TRIM) {
2139 ata_dev_dbg(dev, "disabling queued TRIM support\n");
2140 cmds[ATA_LOG_NCQ_SEND_RECV_DSM_OFFSET] &=
2141 ~ATA_LOG_NCQ_SEND_RECV_DSM_TRIM;
2150 * ata_dev_configure - Configure the specified ATA/ATAPI device
2151 * @dev: Target device to configure
2153 * Configure @dev according to @dev->id. Generic and low-level
2154 * driver specific fixups are also applied.
2157 * Kernel thread context (may sleep)
2160 * 0 on success, -errno otherwise
2162 int ata_dev_configure(struct ata_device *dev)
2164 struct ata_port *ap = dev->link->ap;
2165 struct ata_eh_context *ehc = &dev->link->eh_context;
2166 int print_info = ehc->i.flags & ATA_EHI_PRINTINFO;
2167 const u16 *id = dev->id;
2168 unsigned long xfer_mask;
2169 unsigned int err_mask;
2170 char revbuf[7]; /* XYZ-99\0 */
2171 char fwrevbuf[ATA_ID_FW_REV_LEN+1];
2172 char modelbuf[ATA_ID_PROD_LEN+1];
2175 if (!ata_dev_enabled(dev) && ata_msg_info(ap)) {
2176 ata_dev_info(dev, "%s: ENTER/EXIT -- nodev\n", __func__);
2180 if (ata_msg_probe(ap))
2181 ata_dev_dbg(dev, "%s: ENTER\n", __func__);
2184 dev->horkage |= ata_dev_blacklisted(dev);
2185 ata_force_horkage(dev);
2187 if (dev->horkage & ATA_HORKAGE_DISABLE) {
2188 ata_dev_info(dev, "unsupported device, disabling\n");
2189 ata_dev_disable(dev);
2193 if ((!atapi_enabled || (ap->flags & ATA_FLAG_NO_ATAPI)) &&
2194 dev->class == ATA_DEV_ATAPI) {
2195 ata_dev_warn(dev, "WARNING: ATAPI is %s, device ignored\n",
2196 atapi_enabled ? "not supported with this driver"
2198 ata_dev_disable(dev);
2202 rc = ata_do_link_spd_horkage(dev);
2206 /* some WD SATA-1 drives have issues with LPM, turn on NOLPM for them */
2207 if ((dev->horkage & ATA_HORKAGE_WD_BROKEN_LPM) &&
2208 (id[ATA_ID_SATA_CAPABILITY] & 0xe) == 0x2)
2209 dev->horkage |= ATA_HORKAGE_NOLPM;
2211 if (ap->flags & ATA_FLAG_NO_LPM)
2212 dev->horkage |= ATA_HORKAGE_NOLPM;
2214 if (dev->horkage & ATA_HORKAGE_NOLPM) {
2215 ata_dev_warn(dev, "LPM support broken, forcing max_power\n");
2216 dev->link->ap->target_lpm_policy = ATA_LPM_MAX_POWER;
2219 /* let ACPI work its magic */
2220 rc = ata_acpi_on_devcfg(dev);
2224 /* massage HPA, do it early as it might change IDENTIFY data */
2225 rc = ata_hpa_resize(dev);
2229 /* print device capabilities */
2230 if (ata_msg_probe(ap))
2232 "%s: cfg 49:%04x 82:%04x 83:%04x 84:%04x "
2233 "85:%04x 86:%04x 87:%04x 88:%04x\n",
2235 id[49], id[82], id[83], id[84],
2236 id[85], id[86], id[87], id[88]);
2238 /* initialize to-be-configured parameters */
2239 dev->flags &= ~ATA_DFLAG_CFG_MASK;
2240 dev->max_sectors = 0;
2246 dev->multi_count = 0;
2249 * common ATA, ATAPI feature tests
2252 /* find max transfer mode; for printk only */
2253 xfer_mask = ata_id_xfermask(id);
2255 if (ata_msg_probe(ap))
2258 /* SCSI only uses 4-char revisions, dump full 8 chars from ATA */
2259 ata_id_c_string(dev->id, fwrevbuf, ATA_ID_FW_REV,
2262 ata_id_c_string(dev->id, modelbuf, ATA_ID_PROD,
2265 /* ATA-specific feature tests */
2266 if (dev->class == ATA_DEV_ATA || dev->class == ATA_DEV_ZAC) {
2267 if (ata_id_is_cfa(id)) {
2268 /* CPRM may make this media unusable */
2269 if (id[ATA_ID_CFA_KEY_MGMT] & 1)
2271 "supports DRM functions and may not be fully accessible\n");
2272 snprintf(revbuf, 7, "CFA");
2274 snprintf(revbuf, 7, "ATA-%d", ata_id_major_version(id));
2275 /* Warn the user if the device has TPM extensions */
2276 if (ata_id_has_tpm(id))
2278 "supports DRM functions and may not be fully accessible\n");
2281 dev->n_sectors = ata_id_n_sectors(id);
2283 /* get current R/W Multiple count setting */
2284 if ((dev->id[47] >> 8) == 0x80 && (dev->id[59] & 0x100)) {
2285 unsigned int max = dev->id[47] & 0xff;
2286 unsigned int cnt = dev->id[59] & 0xff;
2287 /* only recognize/allow powers of two here */
2288 if (is_power_of_2(max) && is_power_of_2(cnt))
2290 dev->multi_count = cnt;
2293 if (ata_id_has_lba(id)) {
2294 const char *lba_desc;
2298 dev->flags |= ATA_DFLAG_LBA;
2299 if (ata_id_has_lba48(id)) {
2300 dev->flags |= ATA_DFLAG_LBA48;
2303 if (dev->n_sectors >= (1UL << 28) &&
2304 ata_id_has_flush_ext(id))
2305 dev->flags |= ATA_DFLAG_FLUSH_EXT;
2309 rc = ata_dev_config_ncq(dev, ncq_desc, sizeof(ncq_desc));
2313 /* print device info to dmesg */
2314 if (ata_msg_drv(ap) && print_info) {
2315 ata_dev_info(dev, "%s: %s, %s, max %s\n",
2316 revbuf, modelbuf, fwrevbuf,
2317 ata_mode_string(xfer_mask));
2319 "%llu sectors, multi %u: %s %s\n",
2320 (unsigned long long)dev->n_sectors,
2321 dev->multi_count, lba_desc, ncq_desc);
2326 /* Default translation */
2327 dev->cylinders = id[1];
2329 dev->sectors = id[6];
2331 if (ata_id_current_chs_valid(id)) {
2332 /* Current CHS translation is valid. */
2333 dev->cylinders = id[54];
2334 dev->heads = id[55];
2335 dev->sectors = id[56];
2338 /* print device info to dmesg */
2339 if (ata_msg_drv(ap) && print_info) {
2340 ata_dev_info(dev, "%s: %s, %s, max %s\n",
2341 revbuf, modelbuf, fwrevbuf,
2342 ata_mode_string(xfer_mask));
2344 "%llu sectors, multi %u, CHS %u/%u/%u\n",
2345 (unsigned long long)dev->n_sectors,
2346 dev->multi_count, dev->cylinders,
2347 dev->heads, dev->sectors);
2351 /* Check and mark DevSlp capability. Get DevSlp timing variables
2352 * from SATA Settings page of Identify Device Data Log.
2354 if (ata_id_has_devslp(dev->id)) {
2355 u8 *sata_setting = ap->sector_buf;
2358 dev->flags |= ATA_DFLAG_DEVSLP;
2359 err_mask = ata_read_log_page(dev,
2360 ATA_LOG_SATA_ID_DEV_DATA,
2361 ATA_LOG_SATA_SETTINGS,
2366 "failed to get Identify Device Data, Emask 0x%x\n",
2369 for (i = 0; i < ATA_LOG_DEVSLP_SIZE; i++) {
2370 j = ATA_LOG_DEVSLP_OFFSET + i;
2371 dev->devslp_timing[i] = sata_setting[j];
2378 /* ATAPI-specific feature tests */
2379 else if (dev->class == ATA_DEV_ATAPI) {
2380 const char *cdb_intr_string = "";
2381 const char *atapi_an_string = "";
2382 const char *dma_dir_string = "";
2385 rc = atapi_cdb_len(id);
2386 if ((rc < 12) || (rc > ATAPI_CDB_LEN)) {
2387 if (ata_msg_warn(ap))
2388 ata_dev_warn(dev, "unsupported CDB len\n");
2392 dev->cdb_len = (unsigned int) rc;
2394 /* Enable ATAPI AN if both the host and device have
2395 * the support. If PMP is attached, SNTF is required
2396 * to enable ATAPI AN to discern between PHY status
2397 * changed notifications and ATAPI ANs.
2400 (ap->flags & ATA_FLAG_AN) && ata_id_has_atapi_AN(id) &&
2401 (!sata_pmp_attached(ap) ||
2402 sata_scr_read(&ap->link, SCR_NOTIFICATION, &sntf) == 0)) {
2403 /* issue SET feature command to turn this on */
2404 err_mask = ata_dev_set_feature(dev,
2405 SETFEATURES_SATA_ENABLE, SATA_AN);
2408 "failed to enable ATAPI AN (err_mask=0x%x)\n",
2411 dev->flags |= ATA_DFLAG_AN;
2412 atapi_an_string = ", ATAPI AN";
2416 if (ata_id_cdb_intr(dev->id)) {
2417 dev->flags |= ATA_DFLAG_CDB_INTR;
2418 cdb_intr_string = ", CDB intr";
2421 if (atapi_dmadir || (dev->horkage & ATA_HORKAGE_ATAPI_DMADIR) || atapi_id_dmadir(dev->id)) {
2422 dev->flags |= ATA_DFLAG_DMADIR;
2423 dma_dir_string = ", DMADIR";
2426 if (ata_id_has_da(dev->id)) {
2427 dev->flags |= ATA_DFLAG_DA;
2431 /* print device info to dmesg */
2432 if (ata_msg_drv(ap) && print_info)
2434 "ATAPI: %s, %s, max %s%s%s%s\n",
2436 ata_mode_string(xfer_mask),
2437 cdb_intr_string, atapi_an_string,
2441 /* determine max_sectors */
2442 dev->max_sectors = ATA_MAX_SECTORS;
2443 if (dev->flags & ATA_DFLAG_LBA48)
2444 dev->max_sectors = ATA_MAX_SECTORS_LBA48;
2446 /* Limit PATA drive on SATA cable bridge transfers to udma5,
2448 if (ata_dev_knobble(dev)) {
2449 if (ata_msg_drv(ap) && print_info)
2450 ata_dev_info(dev, "applying bridge limits\n");
2451 dev->udma_mask &= ATA_UDMA5;
2452 dev->max_sectors = ATA_MAX_SECTORS;
2455 if ((dev->class == ATA_DEV_ATAPI) &&
2456 (atapi_command_packet_set(id) == TYPE_TAPE)) {
2457 dev->max_sectors = ATA_MAX_SECTORS_TAPE;
2458 dev->horkage |= ATA_HORKAGE_STUCK_ERR;
2461 if (dev->horkage & ATA_HORKAGE_MAX_SEC_128)
2462 dev->max_sectors = min_t(unsigned int, ATA_MAX_SECTORS_128,
2465 if (dev->horkage & ATA_HORKAGE_MAX_SEC_1024)
2466 dev->max_sectors = min_t(unsigned int, ATA_MAX_SECTORS_1024,
2469 if (dev->horkage & ATA_HORKAGE_MAX_SEC_LBA48)
2470 dev->max_sectors = ATA_MAX_SECTORS_LBA48;
2472 if (ap->ops->dev_config)
2473 ap->ops->dev_config(dev);
2475 if (dev->horkage & ATA_HORKAGE_DIAGNOSTIC) {
2476 /* Let the user know. We don't want to disallow opens for
2477 rescue purposes, or in case the vendor is just a blithering
2478 idiot. Do this after the dev_config call as some controllers
2479 with buggy firmware may want to avoid reporting false device
2484 "Drive reports diagnostics failure. This may indicate a drive\n");
2486 "fault or invalid emulation. Contact drive vendor for information.\n");
2490 if ((dev->horkage & ATA_HORKAGE_FIRMWARE_WARN) && print_info) {
2491 ata_dev_warn(dev, "WARNING: device requires firmware update to be fully functional\n");
2492 ata_dev_warn(dev, " contact the vendor or visit http://ata.wiki.kernel.org\n");
2498 if (ata_msg_probe(ap))
2499 ata_dev_dbg(dev, "%s: EXIT, err\n", __func__);
2504 * ata_cable_40wire - return 40 wire cable type
2507 * Helper method for drivers which want to hardwire 40 wire cable
2511 int ata_cable_40wire(struct ata_port *ap)
2513 return ATA_CBL_PATA40;
2517 * ata_cable_80wire - return 80 wire cable type
2520 * Helper method for drivers which want to hardwire 80 wire cable
2524 int ata_cable_80wire(struct ata_port *ap)
2526 return ATA_CBL_PATA80;
2530 * ata_cable_unknown - return unknown PATA cable.
2533 * Helper method for drivers which have no PATA cable detection.
2536 int ata_cable_unknown(struct ata_port *ap)
2538 return ATA_CBL_PATA_UNK;
2542 * ata_cable_ignore - return ignored PATA cable.
2545 * Helper method for drivers which don't use cable type to limit
2548 int ata_cable_ignore(struct ata_port *ap)
2550 return ATA_CBL_PATA_IGN;
2554 * ata_cable_sata - return SATA cable type
2557 * Helper method for drivers which have SATA cables
2560 int ata_cable_sata(struct ata_port *ap)
2562 return ATA_CBL_SATA;
2566 * ata_bus_probe - Reset and probe ATA bus
2569 * Master ATA bus probing function. Initiates a hardware-dependent
2570 * bus reset, then attempts to identify any devices found on
2574 * PCI/etc. bus probe sem.
2577 * Zero on success, negative errno otherwise.
2580 int ata_bus_probe(struct ata_port *ap)
2582 unsigned int classes[ATA_MAX_DEVICES];
2583 int tries[ATA_MAX_DEVICES];
2585 struct ata_device *dev;
2587 ata_for_each_dev(dev, &ap->link, ALL)
2588 tries[dev->devno] = ATA_PROBE_MAX_TRIES;
2591 ata_for_each_dev(dev, &ap->link, ALL) {
2592 /* If we issue an SRST then an ATA drive (not ATAPI)
2593 * may change configuration and be in PIO0 timing. If
2594 * we do a hard reset (or are coming from power on)
2595 * this is true for ATA or ATAPI. Until we've set a
2596 * suitable controller mode we should not touch the
2597 * bus as we may be talking too fast.
2599 dev->pio_mode = XFER_PIO_0;
2600 dev->dma_mode = 0xff;
2602 /* If the controller has a pio mode setup function
2603 * then use it to set the chipset to rights. Don't
2604 * touch the DMA setup as that will be dealt with when
2605 * configuring devices.
2607 if (ap->ops->set_piomode)
2608 ap->ops->set_piomode(ap, dev);
2611 /* reset and determine device classes */
2612 ap->ops->phy_reset(ap);
2614 ata_for_each_dev(dev, &ap->link, ALL) {
2615 if (dev->class != ATA_DEV_UNKNOWN)
2616 classes[dev->devno] = dev->class;
2618 classes[dev->devno] = ATA_DEV_NONE;
2620 dev->class = ATA_DEV_UNKNOWN;
2623 /* read IDENTIFY page and configure devices. We have to do the identify
2624 specific sequence bass-ackwards so that PDIAG- is released by
2627 ata_for_each_dev(dev, &ap->link, ALL_REVERSE) {
2628 if (tries[dev->devno])
2629 dev->class = classes[dev->devno];
2631 if (!ata_dev_enabled(dev))
2634 rc = ata_dev_read_id(dev, &dev->class, ATA_READID_POSTRESET,
2640 /* Now ask for the cable type as PDIAG- should have been released */
2641 if (ap->ops->cable_detect)
2642 ap->cbl = ap->ops->cable_detect(ap);
2644 /* We may have SATA bridge glue hiding here irrespective of
2645 * the reported cable types and sensed types. When SATA
2646 * drives indicate we have a bridge, we don't know which end
2647 * of the link the bridge is which is a problem.
2649 ata_for_each_dev(dev, &ap->link, ENABLED)
2650 if (ata_id_is_sata(dev->id))
2651 ap->cbl = ATA_CBL_SATA;
2653 /* After the identify sequence we can now set up the devices. We do
2654 this in the normal order so that the user doesn't get confused */
2656 ata_for_each_dev(dev, &ap->link, ENABLED) {
2657 ap->link.eh_context.i.flags |= ATA_EHI_PRINTINFO;
2658 rc = ata_dev_configure(dev);
2659 ap->link.eh_context.i.flags &= ~ATA_EHI_PRINTINFO;
2664 /* configure transfer mode */
2665 rc = ata_set_mode(&ap->link, &dev);
2669 ata_for_each_dev(dev, &ap->link, ENABLED)
2675 tries[dev->devno]--;
2679 /* eeek, something went very wrong, give up */
2680 tries[dev->devno] = 0;
2684 /* give it just one more chance */
2685 tries[dev->devno] = min(tries[dev->devno], 1);
2687 if (tries[dev->devno] == 1) {
2688 /* This is the last chance, better to slow
2689 * down than lose it.
2691 sata_down_spd_limit(&ap->link, 0);
2692 ata_down_xfermask_limit(dev, ATA_DNXFER_PIO);
2696 if (!tries[dev->devno])
2697 ata_dev_disable(dev);
2703 * sata_print_link_status - Print SATA link status
2704 * @link: SATA link to printk link status about
2706 * This function prints link speed and status of a SATA link.
2711 static void sata_print_link_status(struct ata_link *link)
2713 u32 sstatus, scontrol, tmp;
2715 if (sata_scr_read(link, SCR_STATUS, &sstatus))
2717 sata_scr_read(link, SCR_CONTROL, &scontrol);
2719 if (ata_phys_link_online(link)) {
2720 tmp = (sstatus >> 4) & 0xf;
2721 ata_link_info(link, "SATA link up %s (SStatus %X SControl %X)\n",
2722 sata_spd_string(tmp), sstatus, scontrol);
2724 ata_link_info(link, "SATA link down (SStatus %X SControl %X)\n",
2730 * ata_dev_pair - return other device on cable
2733 * Obtain the other device on the same cable, or if none is
2734 * present NULL is returned
2737 struct ata_device *ata_dev_pair(struct ata_device *adev)
2739 struct ata_link *link = adev->link;
2740 struct ata_device *pair = &link->device[1 - adev->devno];
2741 if (!ata_dev_enabled(pair))
2747 * sata_down_spd_limit - adjust SATA spd limit downward
2748 * @link: Link to adjust SATA spd limit for
2749 * @spd_limit: Additional limit
2751 * Adjust SATA spd limit of @link downward. Note that this
2752 * function only adjusts the limit. The change must be applied
2753 * using sata_set_spd().
2755 * If @spd_limit is non-zero, the speed is limited to equal to or
2756 * lower than @spd_limit if such speed is supported. If
2757 * @spd_limit is slower than any supported speed, only the lowest
2758 * supported speed is allowed.
2761 * Inherited from caller.
2764 * 0 on success, negative errno on failure
2766 int sata_down_spd_limit(struct ata_link *link, u32 spd_limit)
2768 u32 sstatus, spd, mask;
2771 if (!sata_scr_valid(link))
2774 /* If SCR can be read, use it to determine the current SPD.
2775 * If not, use cached value in link->sata_spd.
2777 rc = sata_scr_read(link, SCR_STATUS, &sstatus);
2778 if (rc == 0 && ata_sstatus_online(sstatus))
2779 spd = (sstatus >> 4) & 0xf;
2781 spd = link->sata_spd;
2783 mask = link->sata_spd_limit;
2787 /* unconditionally mask off the highest bit */
2788 bit = fls(mask) - 1;
2789 mask &= ~(1 << bit);
2791 /* Mask off all speeds higher than or equal to the current
2792 * one. Force 1.5Gbps if current SPD is not available.
2795 mask &= (1 << (spd - 1)) - 1;
2799 /* were we already at the bottom? */
2804 if (mask & ((1 << spd_limit) - 1))
2805 mask &= (1 << spd_limit) - 1;
2807 bit = ffs(mask) - 1;
2812 link->sata_spd_limit = mask;
2814 ata_link_warn(link, "limiting SATA link speed to %s\n",
2815 sata_spd_string(fls(mask)));
2820 static int __sata_set_spd_needed(struct ata_link *link, u32 *scontrol)
2822 struct ata_link *host_link = &link->ap->link;
2823 u32 limit, target, spd;
2825 limit = link->sata_spd_limit;
2827 /* Don't configure downstream link faster than upstream link.
2828 * It doesn't speed up anything and some PMPs choke on such
2831 if (!ata_is_host_link(link) && host_link->sata_spd)
2832 limit &= (1 << host_link->sata_spd) - 1;
2834 if (limit == UINT_MAX)
2837 target = fls(limit);
2839 spd = (*scontrol >> 4) & 0xf;
2840 *scontrol = (*scontrol & ~0xf0) | ((target & 0xf) << 4);
2842 return spd != target;
2846 * sata_set_spd_needed - is SATA spd configuration needed
2847 * @link: Link in question
2849 * Test whether the spd limit in SControl matches
2850 * @link->sata_spd_limit. This function is used to determine
2851 * whether hardreset is necessary to apply SATA spd
2855 * Inherited from caller.
2858 * 1 if SATA spd configuration is needed, 0 otherwise.
2860 static int sata_set_spd_needed(struct ata_link *link)
2864 if (sata_scr_read(link, SCR_CONTROL, &scontrol))
2867 return __sata_set_spd_needed(link, &scontrol);
2871 * sata_set_spd - set SATA spd according to spd limit
2872 * @link: Link to set SATA spd for
2874 * Set SATA spd of @link according to sata_spd_limit.
2877 * Inherited from caller.
2880 * 0 if spd doesn't need to be changed, 1 if spd has been
2881 * changed. Negative errno if SCR registers are inaccessible.
2883 int sata_set_spd(struct ata_link *link)
2888 if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
2891 if (!__sata_set_spd_needed(link, &scontrol))
2894 if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol)))
2901 * This mode timing computation functionality is ported over from
2902 * drivers/ide/ide-timing.h and was originally written by Vojtech Pavlik
2905 * PIO 0-4, MWDMA 0-2 and UDMA 0-6 timings (in nanoseconds).
2906 * These were taken from ATA/ATAPI-6 standard, rev 0a, except
2907 * for UDMA6, which is currently supported only by Maxtor drives.
2909 * For PIO 5/6 MWDMA 3/4 see the CFA specification 3.0.
2912 static const struct ata_timing ata_timing[] = {
2913 /* { XFER_PIO_SLOW, 120, 290, 240, 960, 290, 240, 0, 960, 0 }, */
2914 { XFER_PIO_0, 70, 290, 240, 600, 165, 150, 0, 600, 0 },
2915 { XFER_PIO_1, 50, 290, 93, 383, 125, 100, 0, 383, 0 },
2916 { XFER_PIO_2, 30, 290, 40, 330, 100, 90, 0, 240, 0 },
2917 { XFER_PIO_3, 30, 80, 70, 180, 80, 70, 0, 180, 0 },
2918 { XFER_PIO_4, 25, 70, 25, 120, 70, 25, 0, 120, 0 },
2919 { XFER_PIO_5, 15, 65, 25, 100, 65, 25, 0, 100, 0 },
2920 { XFER_PIO_6, 10, 55, 20, 80, 55, 20, 0, 80, 0 },
2922 { XFER_SW_DMA_0, 120, 0, 0, 0, 480, 480, 50, 960, 0 },
2923 { XFER_SW_DMA_1, 90, 0, 0, 0, 240, 240, 30, 480, 0 },
2924 { XFER_SW_DMA_2, 60, 0, 0, 0, 120, 120, 20, 240, 0 },
2926 { XFER_MW_DMA_0, 60, 0, 0, 0, 215, 215, 20, 480, 0 },
2927 { XFER_MW_DMA_1, 45, 0, 0, 0, 80, 50, 5, 150, 0 },
2928 { XFER_MW_DMA_2, 25, 0, 0, 0, 70, 25, 5, 120, 0 },
2929 { XFER_MW_DMA_3, 25, 0, 0, 0, 65, 25, 5, 100, 0 },
2930 { XFER_MW_DMA_4, 25, 0, 0, 0, 55, 20, 5, 80, 0 },
2932 /* { XFER_UDMA_SLOW, 0, 0, 0, 0, 0, 0, 0, 0, 150 }, */
2933 { XFER_UDMA_0, 0, 0, 0, 0, 0, 0, 0, 0, 120 },
2934 { XFER_UDMA_1, 0, 0, 0, 0, 0, 0, 0, 0, 80 },
2935 { XFER_UDMA_2, 0, 0, 0, 0, 0, 0, 0, 0, 60 },
2936 { XFER_UDMA_3, 0, 0, 0, 0, 0, 0, 0, 0, 45 },
2937 { XFER_UDMA_4, 0, 0, 0, 0, 0, 0, 0, 0, 30 },
2938 { XFER_UDMA_5, 0, 0, 0, 0, 0, 0, 0, 0, 20 },
2939 { XFER_UDMA_6, 0, 0, 0, 0, 0, 0, 0, 0, 15 },
2944 #define ENOUGH(v, unit) (((v)-1)/(unit)+1)
2945 #define EZ(v, unit) ((v)?ENOUGH(v, unit):0)
2947 static void ata_timing_quantize(const struct ata_timing *t, struct ata_timing *q, int T, int UT)
2949 q->setup = EZ(t->setup * 1000, T);
2950 q->act8b = EZ(t->act8b * 1000, T);
2951 q->rec8b = EZ(t->rec8b * 1000, T);
2952 q->cyc8b = EZ(t->cyc8b * 1000, T);
2953 q->active = EZ(t->active * 1000, T);
2954 q->recover = EZ(t->recover * 1000, T);
2955 q->dmack_hold = EZ(t->dmack_hold * 1000, T);
2956 q->cycle = EZ(t->cycle * 1000, T);
2957 q->udma = EZ(t->udma * 1000, UT);
2960 void ata_timing_merge(const struct ata_timing *a, const struct ata_timing *b,
2961 struct ata_timing *m, unsigned int what)
2963 if (what & ATA_TIMING_SETUP ) m->setup = max(a->setup, b->setup);
2964 if (what & ATA_TIMING_ACT8B ) m->act8b = max(a->act8b, b->act8b);
2965 if (what & ATA_TIMING_REC8B ) m->rec8b = max(a->rec8b, b->rec8b);
2966 if (what & ATA_TIMING_CYC8B ) m->cyc8b = max(a->cyc8b, b->cyc8b);
2967 if (what & ATA_TIMING_ACTIVE ) m->active = max(a->active, b->active);
2968 if (what & ATA_TIMING_RECOVER) m->recover = max(a->recover, b->recover);
2969 if (what & ATA_TIMING_DMACK_HOLD) m->dmack_hold = max(a->dmack_hold, b->dmack_hold);
2970 if (what & ATA_TIMING_CYCLE ) m->cycle = max(a->cycle, b->cycle);
2971 if (what & ATA_TIMING_UDMA ) m->udma = max(a->udma, b->udma);
2974 const struct ata_timing *ata_timing_find_mode(u8 xfer_mode)
2976 const struct ata_timing *t = ata_timing;
2978 while (xfer_mode > t->mode)
2981 if (xfer_mode == t->mode)
2984 WARN_ONCE(true, "%s: unable to find timing for xfer_mode 0x%x\n",
2985 __func__, xfer_mode);
2990 int ata_timing_compute(struct ata_device *adev, unsigned short speed,
2991 struct ata_timing *t, int T, int UT)
2993 const u16 *id = adev->id;
2994 const struct ata_timing *s;
2995 struct ata_timing p;
3001 if (!(s = ata_timing_find_mode(speed)))
3004 memcpy(t, s, sizeof(*s));
3007 * If the drive is an EIDE drive, it can tell us it needs extended
3008 * PIO/MW_DMA cycle timing.
3011 if (id[ATA_ID_FIELD_VALID] & 2) { /* EIDE drive */
3012 memset(&p, 0, sizeof(p));
3014 if (speed >= XFER_PIO_0 && speed < XFER_SW_DMA_0) {
3015 if (speed <= XFER_PIO_2)
3016 p.cycle = p.cyc8b = id[ATA_ID_EIDE_PIO];
3017 else if ((speed <= XFER_PIO_4) ||
3018 (speed == XFER_PIO_5 && !ata_id_is_cfa(id)))
3019 p.cycle = p.cyc8b = id[ATA_ID_EIDE_PIO_IORDY];
3020 } else if (speed >= XFER_MW_DMA_0 && speed <= XFER_MW_DMA_2)
3021 p.cycle = id[ATA_ID_EIDE_DMA_MIN];
3023 ata_timing_merge(&p, t, t, ATA_TIMING_CYCLE | ATA_TIMING_CYC8B);
3027 * Convert the timing to bus clock counts.
3030 ata_timing_quantize(t, t, T, UT);
3033 * Even in DMA/UDMA modes we still use PIO access for IDENTIFY,
3034 * S.M.A.R.T * and some other commands. We have to ensure that the
3035 * DMA cycle timing is slower/equal than the fastest PIO timing.
3038 if (speed > XFER_PIO_6) {
3039 ata_timing_compute(adev, adev->pio_mode, &p, T, UT);
3040 ata_timing_merge(&p, t, t, ATA_TIMING_ALL);
3044 * Lengthen active & recovery time so that cycle time is correct.
3047 if (t->act8b + t->rec8b < t->cyc8b) {
3048 t->act8b += (t->cyc8b - (t->act8b + t->rec8b)) / 2;
3049 t->rec8b = t->cyc8b - t->act8b;
3052 if (t->active + t->recover < t->cycle) {
3053 t->active += (t->cycle - (t->active + t->recover)) / 2;
3054 t->recover = t->cycle - t->active;
3057 /* In a few cases quantisation may produce enough errors to
3058 leave t->cycle too low for the sum of active and recovery
3059 if so we must correct this */
3060 if (t->active + t->recover > t->cycle)
3061 t->cycle = t->active + t->recover;
3067 * ata_timing_cycle2mode - find xfer mode for the specified cycle duration
3068 * @xfer_shift: ATA_SHIFT_* value for transfer type to examine.
3069 * @cycle: cycle duration in ns
3071 * Return matching xfer mode for @cycle. The returned mode is of
3072 * the transfer type specified by @xfer_shift. If @cycle is too
3073 * slow for @xfer_shift, 0xff is returned. If @cycle is faster
3074 * than the fastest known mode, the fasted mode is returned.
3080 * Matching xfer_mode, 0xff if no match found.
3082 u8 ata_timing_cycle2mode(unsigned int xfer_shift, int cycle)
3084 u8 base_mode = 0xff, last_mode = 0xff;
3085 const struct ata_xfer_ent *ent;
3086 const struct ata_timing *t;
3088 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
3089 if (ent->shift == xfer_shift)
3090 base_mode = ent->base;
3092 for (t = ata_timing_find_mode(base_mode);
3093 t && ata_xfer_mode2shift(t->mode) == xfer_shift; t++) {
3094 unsigned short this_cycle;
3096 switch (xfer_shift) {
3098 case ATA_SHIFT_MWDMA:
3099 this_cycle = t->cycle;
3101 case ATA_SHIFT_UDMA:
3102 this_cycle = t->udma;
3108 if (cycle > this_cycle)
3111 last_mode = t->mode;
3118 * ata_down_xfermask_limit - adjust dev xfer masks downward
3119 * @dev: Device to adjust xfer masks
3120 * @sel: ATA_DNXFER_* selector
3122 * Adjust xfer masks of @dev downward. Note that this function
3123 * does not apply the change. Invoking ata_set_mode() afterwards
3124 * will apply the limit.
3127 * Inherited from caller.
3130 * 0 on success, negative errno on failure
3132 int ata_down_xfermask_limit(struct ata_device *dev, unsigned int sel)
3135 unsigned long orig_mask, xfer_mask;
3136 unsigned long pio_mask, mwdma_mask, udma_mask;
3139 quiet = !!(sel & ATA_DNXFER_QUIET);
3140 sel &= ~ATA_DNXFER_QUIET;
3142 xfer_mask = orig_mask = ata_pack_xfermask(dev->pio_mask,
3145 ata_unpack_xfermask(xfer_mask, &pio_mask, &mwdma_mask, &udma_mask);
3148 case ATA_DNXFER_PIO:
3149 highbit = fls(pio_mask) - 1;
3150 pio_mask &= ~(1 << highbit);
3153 case ATA_DNXFER_DMA:
3155 highbit = fls(udma_mask) - 1;
3156 udma_mask &= ~(1 << highbit);
3159 } else if (mwdma_mask) {
3160 highbit = fls(mwdma_mask) - 1;
3161 mwdma_mask &= ~(1 << highbit);
3167 case ATA_DNXFER_40C:
3168 udma_mask &= ATA_UDMA_MASK_40C;
3171 case ATA_DNXFER_FORCE_PIO0:
3173 case ATA_DNXFER_FORCE_PIO:
3182 xfer_mask &= ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask);
3184 if (!(xfer_mask & ATA_MASK_PIO) || xfer_mask == orig_mask)
3188 if (xfer_mask & (ATA_MASK_MWDMA | ATA_MASK_UDMA))
3189 snprintf(buf, sizeof(buf), "%s:%s",
3190 ata_mode_string(xfer_mask),
3191 ata_mode_string(xfer_mask & ATA_MASK_PIO));
3193 snprintf(buf, sizeof(buf), "%s",
3194 ata_mode_string(xfer_mask));
3196 ata_dev_warn(dev, "limiting speed to %s\n", buf);
3199 ata_unpack_xfermask(xfer_mask, &dev->pio_mask, &dev->mwdma_mask,
3205 static int ata_dev_set_mode(struct ata_device *dev)
3207 struct ata_port *ap = dev->link->ap;
3208 struct ata_eh_context *ehc = &dev->link->eh_context;
3209 const bool nosetxfer = dev->horkage & ATA_HORKAGE_NOSETXFER;
3210 const char *dev_err_whine = "";
3211 int ign_dev_err = 0;
3212 unsigned int err_mask = 0;
3215 dev->flags &= ~ATA_DFLAG_PIO;
3216 if (dev->xfer_shift == ATA_SHIFT_PIO)
3217 dev->flags |= ATA_DFLAG_PIO;
3219 if (nosetxfer && ap->flags & ATA_FLAG_SATA && ata_id_is_sata(dev->id))
3220 dev_err_whine = " (SET_XFERMODE skipped)";
3224 "NOSETXFER but PATA detected - can't "
3225 "skip SETXFER, might malfunction\n");
3226 err_mask = ata_dev_set_xfermode(dev);
3229 if (err_mask & ~AC_ERR_DEV)
3233 ehc->i.flags |= ATA_EHI_POST_SETMODE;
3234 rc = ata_dev_revalidate(dev, ATA_DEV_UNKNOWN, 0);
3235 ehc->i.flags &= ~ATA_EHI_POST_SETMODE;
3239 if (dev->xfer_shift == ATA_SHIFT_PIO) {
3240 /* Old CFA may refuse this command, which is just fine */
3241 if (ata_id_is_cfa(dev->id))
3243 /* Catch several broken garbage emulations plus some pre
3245 if (ata_id_major_version(dev->id) == 0 &&
3246 dev->pio_mode <= XFER_PIO_2)
3248 /* Some very old devices and some bad newer ones fail
3249 any kind of SET_XFERMODE request but support PIO0-2
3250 timings and no IORDY */
3251 if (!ata_id_has_iordy(dev->id) && dev->pio_mode <= XFER_PIO_2)
3254 /* Early MWDMA devices do DMA but don't allow DMA mode setting.
3255 Don't fail an MWDMA0 set IFF the device indicates it is in MWDMA0 */
3256 if (dev->xfer_shift == ATA_SHIFT_MWDMA &&
3257 dev->dma_mode == XFER_MW_DMA_0 &&
3258 (dev->id[63] >> 8) & 1)
3261 /* if the device is actually configured correctly, ignore dev err */
3262 if (dev->xfer_mode == ata_xfer_mask2mode(ata_id_xfermask(dev->id)))
3265 if (err_mask & AC_ERR_DEV) {
3269 dev_err_whine = " (device error ignored)";
3272 DPRINTK("xfer_shift=%u, xfer_mode=0x%x\n",
3273 dev->xfer_shift, (int)dev->xfer_mode);
3275 ata_dev_info(dev, "configured for %s%s\n",
3276 ata_mode_string(ata_xfer_mode2mask(dev->xfer_mode)),
3282 ata_dev_err(dev, "failed to set xfermode (err_mask=0x%x)\n", err_mask);
3287 * ata_do_set_mode - Program timings and issue SET FEATURES - XFER
3288 * @link: link on which timings will be programmed
3289 * @r_failed_dev: out parameter for failed device
3291 * Standard implementation of the function used to tune and set
3292 * ATA device disk transfer mode (PIO3, UDMA6, etc.). If
3293 * ata_dev_set_mode() fails, pointer to the failing device is
3294 * returned in @r_failed_dev.
3297 * PCI/etc. bus probe sem.
3300 * 0 on success, negative errno otherwise
3303 int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev)
3305 struct ata_port *ap = link->ap;
3306 struct ata_device *dev;
3307 int rc = 0, used_dma = 0, found = 0;
3309 /* step 1: calculate xfer_mask */
3310 ata_for_each_dev(dev, link, ENABLED) {
3311 unsigned long pio_mask, dma_mask;
3312 unsigned int mode_mask;
3314 mode_mask = ATA_DMA_MASK_ATA;
3315 if (dev->class == ATA_DEV_ATAPI)
3316 mode_mask = ATA_DMA_MASK_ATAPI;
3317 else if (ata_id_is_cfa(dev->id))
3318 mode_mask = ATA_DMA_MASK_CFA;
3320 ata_dev_xfermask(dev);
3321 ata_force_xfermask(dev);
3323 pio_mask = ata_pack_xfermask(dev->pio_mask, 0, 0);
3325 if (libata_dma_mask & mode_mask)
3326 dma_mask = ata_pack_xfermask(0, dev->mwdma_mask,
3331 dev->pio_mode = ata_xfer_mask2mode(pio_mask);
3332 dev->dma_mode = ata_xfer_mask2mode(dma_mask);
3335 if (ata_dma_enabled(dev))
3341 /* step 2: always set host PIO timings */
3342 ata_for_each_dev(dev, link, ENABLED) {
3343 if (dev->pio_mode == 0xff) {
3344 ata_dev_warn(dev, "no PIO support\n");
3349 dev->xfer_mode = dev->pio_mode;
3350 dev->xfer_shift = ATA_SHIFT_PIO;
3351 if (ap->ops->set_piomode)
3352 ap->ops->set_piomode(ap, dev);
3355 /* step 3: set host DMA timings */
3356 ata_for_each_dev(dev, link, ENABLED) {
3357 if (!ata_dma_enabled(dev))
3360 dev->xfer_mode = dev->dma_mode;
3361 dev->xfer_shift = ata_xfer_mode2shift(dev->dma_mode);
3362 if (ap->ops->set_dmamode)
3363 ap->ops->set_dmamode(ap, dev);
3366 /* step 4: update devices' xfer mode */
3367 ata_for_each_dev(dev, link, ENABLED) {
3368 rc = ata_dev_set_mode(dev);
3373 /* Record simplex status. If we selected DMA then the other
3374 * host channels are not permitted to do so.
3376 if (used_dma && (ap->host->flags & ATA_HOST_SIMPLEX))
3377 ap->host->simplex_claimed = ap;
3381 *r_failed_dev = dev;
3386 * ata_wait_ready - wait for link to become ready
3387 * @link: link to be waited on
3388 * @deadline: deadline jiffies for the operation
3389 * @check_ready: callback to check link readiness
3391 * Wait for @link to become ready. @check_ready should return
3392 * positive number if @link is ready, 0 if it isn't, -ENODEV if
3393 * link doesn't seem to be occupied, other errno for other error
3396 * Transient -ENODEV conditions are allowed for
3397 * ATA_TMOUT_FF_WAIT.
3403 * 0 if @linke is ready before @deadline; otherwise, -errno.
3405 int ata_wait_ready(struct ata_link *link, unsigned long deadline,
3406 int (*check_ready)(struct ata_link *link))
3408 unsigned long start = jiffies;
3409 unsigned long nodev_deadline;
3412 /* choose which 0xff timeout to use, read comment in libata.h */
3413 if (link->ap->host->flags & ATA_HOST_PARALLEL_SCAN)
3414 nodev_deadline = ata_deadline(start, ATA_TMOUT_FF_WAIT_LONG);
3416 nodev_deadline = ata_deadline(start, ATA_TMOUT_FF_WAIT);
3418 /* Slave readiness can't be tested separately from master. On
3419 * M/S emulation configuration, this function should be called
3420 * only on the master and it will handle both master and slave.
3422 WARN_ON(link == link->ap->slave_link);
3424 if (time_after(nodev_deadline, deadline))
3425 nodev_deadline = deadline;
3428 unsigned long now = jiffies;
3431 ready = tmp = check_ready(link);
3436 * -ENODEV could be transient. Ignore -ENODEV if link
3437 * is online. Also, some SATA devices take a long
3438 * time to clear 0xff after reset. Wait for
3439 * ATA_TMOUT_FF_WAIT[_LONG] on -ENODEV if link isn't
3442 * Note that some PATA controllers (pata_ali) explode
3443 * if status register is read more than once when
3444 * there's no device attached.
3446 if (ready == -ENODEV) {
3447 if (ata_link_online(link))
3449 else if ((link->ap->flags & ATA_FLAG_SATA) &&
3450 !ata_link_offline(link) &&
3451 time_before(now, nodev_deadline))
3457 if (time_after(now, deadline))
3460 if (!warned && time_after(now, start + 5 * HZ) &&
3461 (deadline - now > 3 * HZ)) {
3463 "link is slow to respond, please be patient "
3464 "(ready=%d)\n", tmp);
3468 ata_msleep(link->ap, 50);
3473 * ata_wait_after_reset - wait for link to become ready after reset
3474 * @link: link to be waited on
3475 * @deadline: deadline jiffies for the operation
3476 * @check_ready: callback to check link readiness
3478 * Wait for @link to become ready after reset.
3484 * 0 if @linke is ready before @deadline; otherwise, -errno.
3486 int ata_wait_after_reset(struct ata_link *link, unsigned long deadline,
3487 int (*check_ready)(struct ata_link *link))
3489 ata_msleep(link->ap, ATA_WAIT_AFTER_RESET);
3491 return ata_wait_ready(link, deadline, check_ready);
3495 * sata_link_debounce - debounce SATA phy status
3496 * @link: ATA link to debounce SATA phy status for
3497 * @params: timing parameters { interval, duratinon, timeout } in msec
3498 * @deadline: deadline jiffies for the operation
3500 * Make sure SStatus of @link reaches stable state, determined by
3501 * holding the same value where DET is not 1 for @duration polled
3502 * every @interval, before @timeout. Timeout constraints the
3503 * beginning of the stable state. Because DET gets stuck at 1 on
3504 * some controllers after hot unplugging, this functions waits
3505 * until timeout then returns 0 if DET is stable at 1.
3507 * @timeout is further limited by @deadline. The sooner of the
3511 * Kernel thread context (may sleep)
3514 * 0 on success, -errno on failure.
3516 int sata_link_debounce(struct ata_link *link, const unsigned long *params,
3517 unsigned long deadline)
3519 unsigned long interval = params[0];
3520 unsigned long duration = params[1];
3521 unsigned long last_jiffies, t;
3525 t = ata_deadline(jiffies, params[2]);
3526 if (time_before(t, deadline))
3529 if ((rc = sata_scr_read(link, SCR_STATUS, &cur)))
3534 last_jiffies = jiffies;
3537 ata_msleep(link->ap, interval);
3538 if ((rc = sata_scr_read(link, SCR_STATUS, &cur)))
3544 if (cur == 1 && time_before(jiffies, deadline))
3546 if (time_after(jiffies,
3547 ata_deadline(last_jiffies, duration)))
3552 /* unstable, start over */
3554 last_jiffies = jiffies;
3556 /* Check deadline. If debouncing failed, return
3557 * -EPIPE to tell upper layer to lower link speed.
3559 if (time_after(jiffies, deadline))
3565 * sata_link_resume - resume SATA link
3566 * @link: ATA link to resume SATA
3567 * @params: timing parameters { interval, duratinon, timeout } in msec
3568 * @deadline: deadline jiffies for the operation
3570 * Resume SATA phy @link and debounce it.
3573 * Kernel thread context (may sleep)
3576 * 0 on success, -errno on failure.
3578 int sata_link_resume(struct ata_link *link, const unsigned long *params,
3579 unsigned long deadline)
3581 int tries = ATA_LINK_RESUME_TRIES;
3582 u32 scontrol, serror;
3585 if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
3589 * Writes to SControl sometimes get ignored under certain
3590 * controllers (ata_piix SIDPR). Make sure DET actually is
3594 scontrol = (scontrol & 0x0f0) | 0x300;
3595 if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol)))
3598 * Some PHYs react badly if SStatus is pounded
3599 * immediately after resuming. Delay 200ms before
3602 ata_msleep(link->ap, 200);
3604 /* is SControl restored correctly? */
3605 if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
3607 } while ((scontrol & 0xf0f) != 0x300 && --tries);
3609 if ((scontrol & 0xf0f) != 0x300) {
3610 ata_link_warn(link, "failed to resume link (SControl %X)\n",
3615 if (tries < ATA_LINK_RESUME_TRIES)
3616 ata_link_warn(link, "link resume succeeded after %d retries\n",
3617 ATA_LINK_RESUME_TRIES - tries);
3619 if ((rc = sata_link_debounce(link, params, deadline)))
3622 /* clear SError, some PHYs require this even for SRST to work */
3623 if (!(rc = sata_scr_read(link, SCR_ERROR, &serror)))
3624 rc = sata_scr_write(link, SCR_ERROR, serror);
3626 return rc != -EINVAL ? rc : 0;
3630 * sata_link_scr_lpm - manipulate SControl IPM and SPM fields
3631 * @link: ATA link to manipulate SControl for
3632 * @policy: LPM policy to configure
3633 * @spm_wakeup: initiate LPM transition to active state
3635 * Manipulate the IPM field of the SControl register of @link
3636 * according to @policy. If @policy is ATA_LPM_MAX_POWER and
3637 * @spm_wakeup is %true, the SPM field is manipulated to wake up
3638 * the link. This function also clears PHYRDY_CHG before
3645 * 0 on success, -errno otherwise.
3647 int sata_link_scr_lpm(struct ata_link *link, enum ata_lpm_policy policy,
3650 struct ata_eh_context *ehc = &link->eh_context;
3651 bool woken_up = false;
3655 rc = sata_scr_read(link, SCR_CONTROL, &scontrol);
3660 case ATA_LPM_MAX_POWER:
3661 /* disable all LPM transitions */
3662 scontrol |= (0x7 << 8);
3663 /* initiate transition to active state */
3665 scontrol |= (0x4 << 12);
3669 case ATA_LPM_MED_POWER:
3670 /* allow LPM to PARTIAL */
3671 scontrol &= ~(0x1 << 8);
3672 scontrol |= (0x6 << 8);
3674 case ATA_LPM_MIN_POWER:
3675 if (ata_link_nr_enabled(link) > 0)
3676 /* no restrictions on LPM transitions */
3677 scontrol &= ~(0x7 << 8);
3679 /* empty port, power off */
3681 scontrol |= (0x1 << 2);
3688 rc = sata_scr_write(link, SCR_CONTROL, scontrol);
3692 /* give the link time to transit out of LPM state */
3696 /* clear PHYRDY_CHG from SError */
3697 ehc->i.serror &= ~SERR_PHYRDY_CHG;
3698 return sata_scr_write(link, SCR_ERROR, SERR_PHYRDY_CHG);
3702 * ata_std_prereset - prepare for reset
3703 * @link: ATA link to be reset
3704 * @deadline: deadline jiffies for the operation
3706 * @link is about to be reset. Initialize it. Failure from
3707 * prereset makes libata abort whole reset sequence and give up
3708 * that port, so prereset should be best-effort. It does its
3709 * best to prepare for reset sequence but if things go wrong, it
3710 * should just whine, not fail.
3713 * Kernel thread context (may sleep)
3716 * 0 on success, -errno otherwise.
3718 int ata_std_prereset(struct ata_link *link, unsigned long deadline)
3720 struct ata_port *ap = link->ap;
3721 struct ata_eh_context *ehc = &link->eh_context;
3722 const unsigned long *timing = sata_ehc_deb_timing(ehc);
3725 /* if we're about to do hardreset, nothing more to do */
3726 if (ehc->i.action & ATA_EH_HARDRESET)
3729 /* if SATA, resume link */
3730 if (ap->flags & ATA_FLAG_SATA) {
3731 rc = sata_link_resume(link, timing, deadline);
3732 /* whine about phy resume failure but proceed */
3733 if (rc && rc != -EOPNOTSUPP)
3735 "failed to resume link for reset (errno=%d)\n",
3739 /* no point in trying softreset on offline link */
3740 if (ata_phys_link_offline(link))
3741 ehc->i.action &= ~ATA_EH_SOFTRESET;
3747 * sata_link_hardreset - reset link via SATA phy reset
3748 * @link: link to reset
3749 * @timing: timing parameters { interval, duratinon, timeout } in msec
3750 * @deadline: deadline jiffies for the operation
3751 * @online: optional out parameter indicating link onlineness
3752 * @check_ready: optional callback to check link readiness
3754 * SATA phy-reset @link using DET bits of SControl register.
3755 * After hardreset, link readiness is waited upon using
3756 * ata_wait_ready() if @check_ready is specified. LLDs are
3757 * allowed to not specify @check_ready and wait itself after this
3758 * function returns. Device classification is LLD's
3761 * *@online is set to one iff reset succeeded and @link is online
3765 * Kernel thread context (may sleep)
3768 * 0 on success, -errno otherwise.
3770 int sata_link_hardreset(struct ata_link *link, const unsigned long *timing,
3771 unsigned long deadline,
3772 bool *online, int (*check_ready)(struct ata_link *))
3782 if (sata_set_spd_needed(link)) {
3783 /* SATA spec says nothing about how to reconfigure
3784 * spd. To be on the safe side, turn off phy during
3785 * reconfiguration. This works for at least ICH7 AHCI
3788 if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
3791 scontrol = (scontrol & 0x0f0) | 0x304;
3793 if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol)))
3799 /* issue phy wake/reset */
3800 if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
3803 scontrol = (scontrol & 0x0f0) | 0x301;
3805 if ((rc = sata_scr_write_flush(link, SCR_CONTROL, scontrol)))
3808 /* Couldn't find anything in SATA I/II specs, but AHCI-1.1
3809 * 10.4.2 says at least 1 ms.
3811 ata_msleep(link->ap, 1);
3813 /* bring link back */
3814 rc = sata_link_resume(link, timing, deadline);
3817 /* if link is offline nothing more to do */
3818 if (ata_phys_link_offline(link))
3821 /* Link is online. From this point, -ENODEV too is an error. */
3825 if (sata_pmp_supported(link->ap) && ata_is_host_link(link)) {
3826 /* If PMP is supported, we have to do follow-up SRST.
3827 * Some PMPs don't send D2H Reg FIS after hardreset if
3828 * the first port is empty. Wait only for
3829 * ATA_TMOUT_PMP_SRST_WAIT.
3832 unsigned long pmp_deadline;
3834 pmp_deadline = ata_deadline(jiffies,
3835 ATA_TMOUT_PMP_SRST_WAIT);
3836 if (time_after(pmp_deadline, deadline))
3837 pmp_deadline = deadline;
3838 ata_wait_ready(link, pmp_deadline, check_ready);
3846 rc = ata_wait_ready(link, deadline, check_ready);
3848 if (rc && rc != -EAGAIN) {
3849 /* online is set iff link is online && reset succeeded */
3852 ata_link_err(link, "COMRESET failed (errno=%d)\n", rc);
3854 DPRINTK("EXIT, rc=%d\n", rc);
3859 * sata_std_hardreset - COMRESET w/o waiting or classification
3860 * @link: link to reset
3861 * @class: resulting class of attached device
3862 * @deadline: deadline jiffies for the operation
3864 * Standard SATA COMRESET w/o waiting or classification.
3867 * Kernel thread context (may sleep)
3870 * 0 if link offline, -EAGAIN if link online, -errno on errors.
3872 int sata_std_hardreset(struct ata_link *link, unsigned int *class,
3873 unsigned long deadline)
3875 const unsigned long *timing = sata_ehc_deb_timing(&link->eh_context);
3880 rc = sata_link_hardreset(link, timing, deadline, &online, NULL);
3881 return online ? -EAGAIN : rc;
3885 * ata_std_postreset - standard postreset callback
3886 * @link: the target ata_link
3887 * @classes: classes of attached devices
3889 * This function is invoked after a successful reset. Note that
3890 * the device might have been reset more than once using
3891 * different reset methods before postreset is invoked.
3894 * Kernel thread context (may sleep)
3896 void ata_std_postreset(struct ata_link *link, unsigned int *classes)
3902 /* reset complete, clear SError */
3903 if (!sata_scr_read(link, SCR_ERROR, &serror))
3904 sata_scr_write(link, SCR_ERROR, serror);
3906 /* print link status */
3907 sata_print_link_status(link);
3913 * ata_dev_same_device - Determine whether new ID matches configured device
3914 * @dev: device to compare against
3915 * @new_class: class of the new device
3916 * @new_id: IDENTIFY page of the new device
3918 * Compare @new_class and @new_id against @dev and determine
3919 * whether @dev is the device indicated by @new_class and
3926 * 1 if @dev matches @new_class and @new_id, 0 otherwise.
3928 static int ata_dev_same_device(struct ata_device *dev, unsigned int new_class,
3931 const u16 *old_id = dev->id;
3932 unsigned char model[2][ATA_ID_PROD_LEN + 1];
3933 unsigned char serial[2][ATA_ID_SERNO_LEN + 1];
3935 if (dev->class != new_class) {
3936 ata_dev_info(dev, "class mismatch %d != %d\n",
3937 dev->class, new_class);
3941 ata_id_c_string(old_id, model[0], ATA_ID_PROD, sizeof(model[0]));
3942 ata_id_c_string(new_id, model[1], ATA_ID_PROD, sizeof(model[1]));
3943 ata_id_c_string(old_id, serial[0], ATA_ID_SERNO, sizeof(serial[0]));
3944 ata_id_c_string(new_id, serial[1], ATA_ID_SERNO, sizeof(serial[1]));
3946 if (strcmp(model[0], model[1])) {
3947 ata_dev_info(dev, "model number mismatch '%s' != '%s'\n",
3948 model[0], model[1]);
3952 if (strcmp(serial[0], serial[1])) {
3953 ata_dev_info(dev, "serial number mismatch '%s' != '%s'\n",
3954 serial[0], serial[1]);
3962 * ata_dev_reread_id - Re-read IDENTIFY data
3963 * @dev: target ATA device
3964 * @readid_flags: read ID flags
3966 * Re-read IDENTIFY page and make sure @dev is still attached to
3970 * Kernel thread context (may sleep)
3973 * 0 on success, negative errno otherwise
3975 int ata_dev_reread_id(struct ata_device *dev, unsigned int readid_flags)
3977 unsigned int class = dev->class;
3978 u16 *id = (void *)dev->link->ap->sector_buf;
3982 rc = ata_dev_read_id(dev, &class, readid_flags, id);
3986 /* is the device still there? */
3987 if (!ata_dev_same_device(dev, class, id))
3990 memcpy(dev->id, id, sizeof(id[0]) * ATA_ID_WORDS);
3995 * ata_dev_revalidate - Revalidate ATA device
3996 * @dev: device to revalidate
3997 * @new_class: new class code
3998 * @readid_flags: read ID flags
4000 * Re-read IDENTIFY page, make sure @dev is still attached to the
4001 * port and reconfigure it according to the new IDENTIFY page.
4004 * Kernel thread context (may sleep)
4007 * 0 on success, negative errno otherwise
4009 int ata_dev_revalidate(struct ata_device *dev, unsigned int new_class,
4010 unsigned int readid_flags)
4012 u64 n_sectors = dev->n_sectors;
4013 u64 n_native_sectors = dev->n_native_sectors;
4016 if (!ata_dev_enabled(dev))
4019 /* fail early if !ATA && !ATAPI to avoid issuing [P]IDENTIFY to PMP */
4020 if (ata_class_enabled(new_class) &&
4021 new_class != ATA_DEV_ATA &&
4022 new_class != ATA_DEV_ATAPI &&
4023 new_class != ATA_DEV_ZAC &&
4024 new_class != ATA_DEV_SEMB) {
4025 ata_dev_info(dev, "class mismatch %u != %u\n",
4026 dev->class, new_class);
4032 rc = ata_dev_reread_id(dev, readid_flags);
4036 /* configure device according to the new ID */
4037 rc = ata_dev_configure(dev);
4041 /* verify n_sectors hasn't changed */
4042 if (dev->class != ATA_DEV_ATA || !n_sectors ||
4043 dev->n_sectors == n_sectors)
4046 /* n_sectors has changed */
4047 ata_dev_warn(dev, "n_sectors mismatch %llu != %llu\n",
4048 (unsigned long long)n_sectors,
4049 (unsigned long long)dev->n_sectors);
4052 * Something could have caused HPA to be unlocked
4053 * involuntarily. If n_native_sectors hasn't changed and the
4054 * new size matches it, keep the device.
4056 if (dev->n_native_sectors == n_native_sectors &&
4057 dev->n_sectors > n_sectors && dev->n_sectors == n_native_sectors) {
4059 "new n_sectors matches native, probably "
4060 "late HPA unlock, n_sectors updated\n");
4061 /* use the larger n_sectors */
4066 * Some BIOSes boot w/o HPA but resume w/ HPA locked. Try
4067 * unlocking HPA in those cases.
4069 * https://bugzilla.kernel.org/show_bug.cgi?id=15396
4071 if (dev->n_native_sectors == n_native_sectors &&
4072 dev->n_sectors < n_sectors && n_sectors == n_native_sectors &&
4073 !(dev->horkage & ATA_HORKAGE_BROKEN_HPA)) {
4075 "old n_sectors matches native, probably "
4076 "late HPA lock, will try to unlock HPA\n");
4077 /* try unlocking HPA */
4078 dev->flags |= ATA_DFLAG_UNLOCK_HPA;
4083 /* restore original n_[native_]sectors and fail */
4084 dev->n_native_sectors = n_native_sectors;
4085 dev->n_sectors = n_sectors;
4087 ata_dev_err(dev, "revalidation failed (errno=%d)\n", rc);
4091 struct ata_blacklist_entry {
4092 const char *model_num;
4093 const char *model_rev;
4094 unsigned long horkage;
4097 static const struct ata_blacklist_entry ata_device_blacklist [] = {
4098 /* Devices with DMA related problems under Linux */
4099 { "WDC AC11000H", NULL, ATA_HORKAGE_NODMA },
4100 { "WDC AC22100H", NULL, ATA_HORKAGE_NODMA },
4101 { "WDC AC32500H", NULL, ATA_HORKAGE_NODMA },
4102 { "WDC AC33100H", NULL, ATA_HORKAGE_NODMA },
4103 { "WDC AC31600H", NULL, ATA_HORKAGE_NODMA },
4104 { "WDC AC32100H", "24.09P07", ATA_HORKAGE_NODMA },
4105 { "WDC AC23200L", "21.10N21", ATA_HORKAGE_NODMA },
4106 { "Compaq CRD-8241B", NULL, ATA_HORKAGE_NODMA },
4107 { "CRD-8400B", NULL, ATA_HORKAGE_NODMA },
4108 { "CRD-848[02]B", NULL, ATA_HORKAGE_NODMA },
4109 { "CRD-84", NULL, ATA_HORKAGE_NODMA },
4110 { "SanDisk SDP3B", NULL, ATA_HORKAGE_NODMA },
4111 { "SanDisk SDP3B-64", NULL, ATA_HORKAGE_NODMA },
4112 { "SANYO CD-ROM CRD", NULL, ATA_HORKAGE_NODMA },
4113 { "HITACHI CDR-8", NULL, ATA_HORKAGE_NODMA },
4114 { "HITACHI CDR-8[34]35",NULL, ATA_HORKAGE_NODMA },
4115 { "Toshiba CD-ROM XM-6202B", NULL, ATA_HORKAGE_NODMA },
4116 { "TOSHIBA CD-ROM XM-1702BC", NULL, ATA_HORKAGE_NODMA },
4117 { "CD-532E-A", NULL, ATA_HORKAGE_NODMA },
4118 { "E-IDE CD-ROM CR-840",NULL, ATA_HORKAGE_NODMA },
4119 { "CD-ROM Drive/F5A", NULL, ATA_HORKAGE_NODMA },
4120 { "WPI CDD-820", NULL, ATA_HORKAGE_NODMA },
4121 { "SAMSUNG CD-ROM SC-148C", NULL, ATA_HORKAGE_NODMA },
4122 { "SAMSUNG CD-ROM SC", NULL, ATA_HORKAGE_NODMA },
4123 { "ATAPI CD-ROM DRIVE 40X MAXIMUM",NULL,ATA_HORKAGE_NODMA },
4124 { "_NEC DV5800A", NULL, ATA_HORKAGE_NODMA },
4125 { "SAMSUNG CD-ROM SN-124", "N001", ATA_HORKAGE_NODMA },
4126 { "Seagate STT20000A", NULL, ATA_HORKAGE_NODMA },
4127 { " 2GB ATA Flash Disk", "ADMA428M", ATA_HORKAGE_NODMA },
4128 /* Odd clown on sil3726/4726 PMPs */
4129 { "Config Disk", NULL, ATA_HORKAGE_DISABLE },
4131 /* Weird ATAPI devices */
4132 { "TORiSAN DVD-ROM DRD-N216", NULL, ATA_HORKAGE_MAX_SEC_128 },
4133 { "QUANTUM DAT DAT72-000", NULL, ATA_HORKAGE_ATAPI_MOD16_DMA },
4134 { "Slimtype DVD A DS8A8SH", NULL, ATA_HORKAGE_MAX_SEC_LBA48 },
4135 { "Slimtype DVD A DS8A9SH", NULL, ATA_HORKAGE_MAX_SEC_LBA48 },
4138 * Causes silent data corruption with higher max sects.
4139 * http://lkml.kernel.org/g/x49wpy40ysk.fsf@segfault.boston.devel.redhat.com
4141 { "ST380013AS", "3.20", ATA_HORKAGE_MAX_SEC_1024 },
4144 * These devices time out with higher max sects.
4145 * https://bugzilla.kernel.org/show_bug.cgi?id=121671
4147 { "LITEON CX1-JB*-HP", NULL, ATA_HORKAGE_MAX_SEC_1024 },
4148 { "LITEON EP1-*", NULL, ATA_HORKAGE_MAX_SEC_1024 },
4150 /* Devices we expect to fail diagnostics */
4152 /* Devices where NCQ should be avoided */
4154 { "WDC WD740ADFD-00", NULL, ATA_HORKAGE_NONCQ },
4155 { "WDC WD740ADFD-00NLR1", NULL, ATA_HORKAGE_NONCQ, },
4156 /* http://thread.gmane.org/gmane.linux.ide/14907 */
4157 { "FUJITSU MHT2060BH", NULL, ATA_HORKAGE_NONCQ },
4159 { "Maxtor *", "BANC*", ATA_HORKAGE_NONCQ },
4160 { "Maxtor 7V300F0", "VA111630", ATA_HORKAGE_NONCQ },
4161 { "ST380817AS", "3.42", ATA_HORKAGE_NONCQ },
4162 { "ST3160023AS", "3.42", ATA_HORKAGE_NONCQ },
4163 { "OCZ CORE_SSD", "02.10104", ATA_HORKAGE_NONCQ },
4165 /* Seagate NCQ + FLUSH CACHE firmware bug */
4166 { "ST31500341AS", "SD1[5-9]", ATA_HORKAGE_NONCQ |
4167 ATA_HORKAGE_FIRMWARE_WARN },
4169 { "ST31000333AS", "SD1[5-9]", ATA_HORKAGE_NONCQ |
4170 ATA_HORKAGE_FIRMWARE_WARN },
4172 { "ST3640[36]23AS", "SD1[5-9]", ATA_HORKAGE_NONCQ |
4173 ATA_HORKAGE_FIRMWARE_WARN },
4175 { "ST3320[68]13AS", "SD1[5-9]", ATA_HORKAGE_NONCQ |
4176 ATA_HORKAGE_FIRMWARE_WARN },
4178 /* drives which fail FPDMA_AA activation (some may freeze afterwards)
4179 the ST disks also have LPM issues */
4180 { "ST1000LM024 HN-M101MBB", "2AR10001", ATA_HORKAGE_BROKEN_FPDMA_AA |
4181 ATA_HORKAGE_NOLPM, },
4182 { "ST1000LM024 HN-M101MBB", "2BA30001", ATA_HORKAGE_BROKEN_FPDMA_AA |
4183 ATA_HORKAGE_NOLPM, },
4184 { "VB0250EAVER", "HPG7", ATA_HORKAGE_BROKEN_FPDMA_AA },
4186 /* Blacklist entries taken from Silicon Image 3124/3132
4187 Windows driver .inf file - also several Linux problem reports */
4188 { "HTS541060G9SA00", "MB3OC60D", ATA_HORKAGE_NONCQ, },
4189 { "HTS541080G9SA00", "MB4OC60D", ATA_HORKAGE_NONCQ, },
4190 { "HTS541010G9SA00", "MBZOC60D", ATA_HORKAGE_NONCQ, },
4192 /* https://bugzilla.kernel.org/show_bug.cgi?id=15573 */
4193 { "C300-CTFDDAC128MAG", "0001", ATA_HORKAGE_NONCQ, },
4195 /* Some Sandisk SSDs lock up hard with NCQ enabled. Reported on
4196 SD7SN6S256G and SD8SN8U256G */
4197 { "SanDisk SD[78]SN*G", NULL, ATA_HORKAGE_NONCQ, },
4199 /* devices which puke on READ_NATIVE_MAX */
4200 { "HDS724040KLSA80", "KFAOA20N", ATA_HORKAGE_BROKEN_HPA, },
4201 { "WDC WD3200JD-00KLB0", "WD-WCAMR1130137", ATA_HORKAGE_BROKEN_HPA },
4202 { "WDC WD2500JD-00HBB0", "WD-WMAL71490727", ATA_HORKAGE_BROKEN_HPA },
4203 { "MAXTOR 6L080L4", "A93.0500", ATA_HORKAGE_BROKEN_HPA },
4205 /* this one allows HPA unlocking but fails IOs on the area */
4206 { "OCZ-VERTEX", "1.30", ATA_HORKAGE_BROKEN_HPA },
4208 /* Devices which report 1 sector over size HPA */
4209 { "ST340823A", NULL, ATA_HORKAGE_HPA_SIZE, },
4210 { "ST320413A", NULL, ATA_HORKAGE_HPA_SIZE, },
4211 { "ST310211A", NULL, ATA_HORKAGE_HPA_SIZE, },
4213 /* Devices which get the IVB wrong */
4214 { "QUANTUM FIREBALLlct10 05", "A03.0900", ATA_HORKAGE_IVB, },
4215 /* Maybe we should just blacklist TSSTcorp... */
4216 { "TSSTcorp CDDVDW SH-S202[HJN]", "SB0[01]", ATA_HORKAGE_IVB, },
4218 /* Devices that do not need bridging limits applied */
4219 { "MTRON MSP-SATA*", NULL, ATA_HORKAGE_BRIDGE_OK, },
4220 { "BUFFALO HD-QSU2/R5", NULL, ATA_HORKAGE_BRIDGE_OK, },
4222 /* Devices which aren't very happy with higher link speeds */
4223 { "WD My Book", NULL, ATA_HORKAGE_1_5_GBPS, },
4224 { "Seagate FreeAgent GoFlex", NULL, ATA_HORKAGE_1_5_GBPS, },
4227 * Devices which choke on SETXFER. Applies only if both the
4228 * device and controller are SATA.
4230 { "PIONEER DVD-RW DVRTD08", NULL, ATA_HORKAGE_NOSETXFER },
4231 { "PIONEER DVD-RW DVRTD08A", NULL, ATA_HORKAGE_NOSETXFER },
4232 { "PIONEER DVD-RW DVR-215", NULL, ATA_HORKAGE_NOSETXFER },
4233 { "PIONEER DVD-RW DVR-212D", NULL, ATA_HORKAGE_NOSETXFER },
4234 { "PIONEER DVD-RW DVR-216D", NULL, ATA_HORKAGE_NOSETXFER },
4236 /* Crucial BX100 SSD 500GB has broken LPM support */
4237 { "CT500BX100SSD1", NULL, ATA_HORKAGE_NOLPM },
4239 /* 512GB MX100 with MU01 firmware has both queued TRIM and LPM issues */
4240 { "Crucial_CT512MX100*", "MU01", ATA_HORKAGE_NO_NCQ_TRIM |
4241 ATA_HORKAGE_ZERO_AFTER_TRIM |
4242 ATA_HORKAGE_NOLPM, },
4243 /* 512GB MX100 with newer firmware has only LPM issues */
4244 { "Crucial_CT512MX100*", NULL, ATA_HORKAGE_ZERO_AFTER_TRIM |
4245 ATA_HORKAGE_NOLPM, },
4247 /* 480GB+ M500 SSDs have both queued TRIM and LPM issues */
4248 { "Crucial_CT480M500*", NULL, ATA_HORKAGE_NO_NCQ_TRIM |
4249 ATA_HORKAGE_ZERO_AFTER_TRIM |
4250 ATA_HORKAGE_NOLPM, },
4251 { "Crucial_CT960M500*", NULL, ATA_HORKAGE_NO_NCQ_TRIM |
4252 ATA_HORKAGE_ZERO_AFTER_TRIM |
4253 ATA_HORKAGE_NOLPM, },
4255 /* devices that don't properly handle queued TRIM commands */
4256 { "Micron_M500IT_*", "MU01", ATA_HORKAGE_NO_NCQ_TRIM |
4257 ATA_HORKAGE_ZERO_AFTER_TRIM, },
4258 { "Micron_M500_*", NULL, ATA_HORKAGE_NO_NCQ_TRIM |
4259 ATA_HORKAGE_ZERO_AFTER_TRIM, },
4260 { "Crucial_CT*M500*", NULL, ATA_HORKAGE_NO_NCQ_TRIM |
4261 ATA_HORKAGE_ZERO_AFTER_TRIM, },
4262 { "Micron_M5[15]0_*", "MU01", ATA_HORKAGE_NO_NCQ_TRIM |
4263 ATA_HORKAGE_ZERO_AFTER_TRIM, },
4264 { "Crucial_CT*M550*", "MU01", ATA_HORKAGE_NO_NCQ_TRIM |
4265 ATA_HORKAGE_ZERO_AFTER_TRIM, },
4266 { "Crucial_CT*MX100*", "MU01", ATA_HORKAGE_NO_NCQ_TRIM |
4267 ATA_HORKAGE_ZERO_AFTER_TRIM, },
4268 { "Samsung SSD 840*", NULL, ATA_HORKAGE_NO_NCQ_TRIM |
4269 ATA_HORKAGE_ZERO_AFTER_TRIM, },
4270 { "Samsung SSD 850*", NULL, ATA_HORKAGE_NO_NCQ_TRIM |
4271 ATA_HORKAGE_ZERO_AFTER_TRIM, },
4272 { "Samsung SSD 860*", NULL, ATA_HORKAGE_NO_NCQ_TRIM |
4273 ATA_HORKAGE_ZERO_AFTER_TRIM, },
4274 { "Samsung SSD 870*", NULL, ATA_HORKAGE_NO_NCQ_TRIM |
4275 ATA_HORKAGE_ZERO_AFTER_TRIM, },
4276 { "FCCT*M500*", NULL, ATA_HORKAGE_NO_NCQ_TRIM |
4277 ATA_HORKAGE_ZERO_AFTER_TRIM, },
4279 /* devices that don't properly handle TRIM commands */
4280 { "SuperSSpeed S238*", NULL, ATA_HORKAGE_NOTRIM, },
4283 * As defined, the DRAT (Deterministic Read After Trim) and RZAT
4284 * (Return Zero After Trim) flags in the ATA Command Set are
4285 * unreliable in the sense that they only define what happens if
4286 * the device successfully executed the DSM TRIM command. TRIM
4287 * is only advisory, however, and the device is free to silently
4288 * ignore all or parts of the request.
4290 * Whitelist drives that are known to reliably return zeroes
4295 * The intel 510 drive has buggy DRAT/RZAT. Explicitly exclude
4296 * that model before whitelisting all other intel SSDs.
4298 { "INTEL*SSDSC2MH*", NULL, 0, },
4300 { "Micron*", NULL, ATA_HORKAGE_ZERO_AFTER_TRIM, },
4301 { "Crucial*", NULL, ATA_HORKAGE_ZERO_AFTER_TRIM, },
4302 { "INTEL*SSD*", NULL, ATA_HORKAGE_ZERO_AFTER_TRIM, },
4303 { "SSD*INTEL*", NULL, ATA_HORKAGE_ZERO_AFTER_TRIM, },
4304 { "Samsung*SSD*", NULL, ATA_HORKAGE_ZERO_AFTER_TRIM, },
4305 { "SAMSUNG*SSD*", NULL, ATA_HORKAGE_ZERO_AFTER_TRIM, },
4306 { "SAMSUNG*MZ7KM*", NULL, ATA_HORKAGE_ZERO_AFTER_TRIM, },
4307 { "ST[1248][0248]0[FH]*", NULL, ATA_HORKAGE_ZERO_AFTER_TRIM, },
4310 * Some WD SATA-I drives spin up and down erratically when the link
4311 * is put into the slumber mode. We don't have full list of the
4312 * affected devices. Disable LPM if the device matches one of the
4313 * known prefixes and is SATA-1. As a side effect LPM partial is
4316 * https://bugzilla.kernel.org/show_bug.cgi?id=57211
4318 { "WDC WD800JD-*", NULL, ATA_HORKAGE_WD_BROKEN_LPM },
4319 { "WDC WD1200JD-*", NULL, ATA_HORKAGE_WD_BROKEN_LPM },
4320 { "WDC WD1600JD-*", NULL, ATA_HORKAGE_WD_BROKEN_LPM },
4321 { "WDC WD2000JD-*", NULL, ATA_HORKAGE_WD_BROKEN_LPM },
4322 { "WDC WD2500JD-*", NULL, ATA_HORKAGE_WD_BROKEN_LPM },
4323 { "WDC WD3000JD-*", NULL, ATA_HORKAGE_WD_BROKEN_LPM },
4324 { "WDC WD3200JD-*", NULL, ATA_HORKAGE_WD_BROKEN_LPM },
4330 static unsigned long ata_dev_blacklisted(const struct ata_device *dev)
4332 unsigned char model_num[ATA_ID_PROD_LEN + 1];
4333 unsigned char model_rev[ATA_ID_FW_REV_LEN + 1];
4334 const struct ata_blacklist_entry *ad = ata_device_blacklist;
4336 ata_id_c_string(dev->id, model_num, ATA_ID_PROD, sizeof(model_num));
4337 ata_id_c_string(dev->id, model_rev, ATA_ID_FW_REV, sizeof(model_rev));
4339 while (ad->model_num) {
4340 if (glob_match(ad->model_num, model_num)) {
4341 if (ad->model_rev == NULL)
4343 if (glob_match(ad->model_rev, model_rev))
4351 static int ata_dma_blacklisted(const struct ata_device *dev)
4353 /* We don't support polling DMA.
4354 * DMA blacklist those ATAPI devices with CDB-intr (and use PIO)
4355 * if the LLDD handles only interrupts in the HSM_ST_LAST state.
4357 if ((dev->link->ap->flags & ATA_FLAG_PIO_POLLING) &&
4358 (dev->flags & ATA_DFLAG_CDB_INTR))
4360 return (dev->horkage & ATA_HORKAGE_NODMA) ? 1 : 0;
4364 * ata_is_40wire - check drive side detection
4367 * Perform drive side detection decoding, allowing for device vendors
4368 * who can't follow the documentation.
4371 static int ata_is_40wire(struct ata_device *dev)
4373 if (dev->horkage & ATA_HORKAGE_IVB)
4374 return ata_drive_40wire_relaxed(dev->id);
4375 return ata_drive_40wire(dev->id);
4379 * cable_is_40wire - 40/80/SATA decider
4380 * @ap: port to consider
4382 * This function encapsulates the policy for speed management
4383 * in one place. At the moment we don't cache the result but
4384 * there is a good case for setting ap->cbl to the result when
4385 * we are called with unknown cables (and figuring out if it
4386 * impacts hotplug at all).
4388 * Return 1 if the cable appears to be 40 wire.
4391 static int cable_is_40wire(struct ata_port *ap)
4393 struct ata_link *link;
4394 struct ata_device *dev;
4396 /* If the controller thinks we are 40 wire, we are. */
4397 if (ap->cbl == ATA_CBL_PATA40)
4400 /* If the controller thinks we are 80 wire, we are. */
4401 if (ap->cbl == ATA_CBL_PATA80 || ap->cbl == ATA_CBL_SATA)
4404 /* If the system is known to be 40 wire short cable (eg
4405 * laptop), then we allow 80 wire modes even if the drive
4408 if (ap->cbl == ATA_CBL_PATA40_SHORT)
4411 /* If the controller doesn't know, we scan.
4413 * Note: We look for all 40 wire detects at this point. Any
4414 * 80 wire detect is taken to be 80 wire cable because
4415 * - in many setups only the one drive (slave if present) will
4416 * give a valid detect
4417 * - if you have a non detect capable drive you don't want it
4418 * to colour the choice
4420 ata_for_each_link(link, ap, EDGE) {
4421 ata_for_each_dev(dev, link, ENABLED) {
4422 if (!ata_is_40wire(dev))
4430 * ata_dev_xfermask - Compute supported xfermask of the given device
4431 * @dev: Device to compute xfermask for
4433 * Compute supported xfermask of @dev and store it in
4434 * dev->*_mask. This function is responsible for applying all
4435 * known limits including host controller limits, device
4441 static void ata_dev_xfermask(struct ata_device *dev)
4443 struct ata_link *link = dev->link;
4444 struct ata_port *ap = link->ap;
4445 struct ata_host *host = ap->host;
4446 unsigned long xfer_mask;
4448 /* controller modes available */
4449 xfer_mask = ata_pack_xfermask(ap->pio_mask,
4450 ap->mwdma_mask, ap->udma_mask);
4452 /* drive modes available */
4453 xfer_mask &= ata_pack_xfermask(dev->pio_mask,
4454 dev->mwdma_mask, dev->udma_mask);
4455 xfer_mask &= ata_id_xfermask(dev->id);
4458 * CFA Advanced TrueIDE timings are not allowed on a shared
4461 if (ata_dev_pair(dev)) {
4462 /* No PIO5 or PIO6 */
4463 xfer_mask &= ~(0x03 << (ATA_SHIFT_PIO + 5));
4464 /* No MWDMA3 or MWDMA 4 */
4465 xfer_mask &= ~(0x03 << (ATA_SHIFT_MWDMA + 3));
4468 if (ata_dma_blacklisted(dev)) {
4469 xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA);
4471 "device is on DMA blacklist, disabling DMA\n");
4474 if ((host->flags & ATA_HOST_SIMPLEX) &&
4475 host->simplex_claimed && host->simplex_claimed != ap) {
4476 xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA);
4478 "simplex DMA is claimed by other device, disabling DMA\n");
4481 if (ap->flags & ATA_FLAG_NO_IORDY)
4482 xfer_mask &= ata_pio_mask_no_iordy(dev);
4484 if (ap->ops->mode_filter)
4485 xfer_mask = ap->ops->mode_filter(dev, xfer_mask);
4487 /* Apply cable rule here. Don't apply it early because when
4488 * we handle hot plug the cable type can itself change.
4489 * Check this last so that we know if the transfer rate was
4490 * solely limited by the cable.
4491 * Unknown or 80 wire cables reported host side are checked
4492 * drive side as well. Cases where we know a 40wire cable
4493 * is used safely for 80 are not checked here.
4495 if (xfer_mask & (0xF8 << ATA_SHIFT_UDMA))
4496 /* UDMA/44 or higher would be available */
4497 if (cable_is_40wire(ap)) {
4499 "limited to UDMA/33 due to 40-wire cable\n");
4500 xfer_mask &= ~(0xF8 << ATA_SHIFT_UDMA);
4503 ata_unpack_xfermask(xfer_mask, &dev->pio_mask,
4504 &dev->mwdma_mask, &dev->udma_mask);
4508 * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command
4509 * @dev: Device to which command will be sent
4511 * Issue SET FEATURES - XFER MODE command to device @dev
4515 * PCI/etc. bus probe sem.
4518 * 0 on success, AC_ERR_* mask otherwise.
4521 static unsigned int ata_dev_set_xfermode(struct ata_device *dev)
4523 struct ata_taskfile tf;
4524 unsigned int err_mask;
4526 /* set up set-features taskfile */
4527 DPRINTK("set features - xfer mode\n");
4529 /* Some controllers and ATAPI devices show flaky interrupt
4530 * behavior after setting xfer mode. Use polling instead.
4532 ata_tf_init(dev, &tf);
4533 tf.command = ATA_CMD_SET_FEATURES;
4534 tf.feature = SETFEATURES_XFER;
4535 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_POLLING;
4536 tf.protocol = ATA_PROT_NODATA;
4537 /* If we are using IORDY we must send the mode setting command */
4538 if (ata_pio_need_iordy(dev))
4539 tf.nsect = dev->xfer_mode;
4540 /* If the device has IORDY and the controller does not - turn it off */
4541 else if (ata_id_has_iordy(dev->id))
4543 else /* In the ancient relic department - skip all of this */
4546 /* On some disks, this command causes spin-up, so we need longer timeout */
4547 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 15000);
4549 DPRINTK("EXIT, err_mask=%x\n", err_mask);
4554 * ata_dev_set_feature - Issue SET FEATURES - SATA FEATURES
4555 * @dev: Device to which command will be sent
4556 * @enable: Whether to enable or disable the feature
4557 * @feature: The sector count represents the feature to set
4559 * Issue SET FEATURES - SATA FEATURES command to device @dev
4560 * on port @ap with sector count
4563 * PCI/etc. bus probe sem.
4566 * 0 on success, AC_ERR_* mask otherwise.
4568 unsigned int ata_dev_set_feature(struct ata_device *dev, u8 enable, u8 feature)
4570 struct ata_taskfile tf;
4571 unsigned int err_mask;
4573 /* set up set-features taskfile */
4574 DPRINTK("set features - SATA features\n");
4576 ata_tf_init(dev, &tf);
4577 tf.command = ATA_CMD_SET_FEATURES;
4578 tf.feature = enable;
4579 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
4580 tf.protocol = ATA_PROT_NODATA;
4583 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
4585 DPRINTK("EXIT, err_mask=%x\n", err_mask);
4588 EXPORT_SYMBOL_GPL(ata_dev_set_feature);
4591 * ata_dev_init_params - Issue INIT DEV PARAMS command
4592 * @dev: Device to which command will be sent
4593 * @heads: Number of heads (taskfile parameter)
4594 * @sectors: Number of sectors (taskfile parameter)
4597 * Kernel thread context (may sleep)
4600 * 0 on success, AC_ERR_* mask otherwise.
4602 static unsigned int ata_dev_init_params(struct ata_device *dev,
4603 u16 heads, u16 sectors)
4605 struct ata_taskfile tf;
4606 unsigned int err_mask;
4608 /* Number of sectors per track 1-255. Number of heads 1-16 */
4609 if (sectors < 1 || sectors > 255 || heads < 1 || heads > 16)
4610 return AC_ERR_INVALID;
4612 /* set up init dev params taskfile */
4613 DPRINTK("init dev params \n");
4615 ata_tf_init(dev, &tf);
4616 tf.command = ATA_CMD_INIT_DEV_PARAMS;
4617 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
4618 tf.protocol = ATA_PROT_NODATA;
4620 tf.device |= (heads - 1) & 0x0f; /* max head = num. of heads - 1 */
4622 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
4623 /* A clean abort indicates an original or just out of spec drive
4624 and we should continue as we issue the setup based on the
4625 drive reported working geometry */
4626 if (err_mask == AC_ERR_DEV && (tf.feature & ATA_ABORTED))
4629 DPRINTK("EXIT, err_mask=%x\n", err_mask);
4634 * ata_sg_clean - Unmap DMA memory associated with command
4635 * @qc: Command containing DMA memory to be released
4637 * Unmap all mapped DMA memory associated with this command.
4640 * spin_lock_irqsave(host lock)
4642 void ata_sg_clean(struct ata_queued_cmd *qc)
4644 struct ata_port *ap = qc->ap;
4645 struct scatterlist *sg = qc->sg;
4646 int dir = qc->dma_dir;
4648 WARN_ON_ONCE(sg == NULL);
4650 VPRINTK("unmapping %u sg elements\n", qc->n_elem);
4653 dma_unmap_sg(ap->dev, sg, qc->orig_n_elem, dir);
4655 qc->flags &= ~ATA_QCFLAG_DMAMAP;
4660 * atapi_check_dma - Check whether ATAPI DMA can be supported
4661 * @qc: Metadata associated with taskfile to check
4663 * Allow low-level driver to filter ATA PACKET commands, returning
4664 * a status indicating whether or not it is OK to use DMA for the
4665 * supplied PACKET command.
4668 * spin_lock_irqsave(host lock)
4670 * RETURNS: 0 when ATAPI DMA can be used
4673 int atapi_check_dma(struct ata_queued_cmd *qc)
4675 struct ata_port *ap = qc->ap;
4677 /* Don't allow DMA if it isn't multiple of 16 bytes. Quite a
4678 * few ATAPI devices choke on such DMA requests.
4680 if (!(qc->dev->horkage & ATA_HORKAGE_ATAPI_MOD16_DMA) &&
4681 unlikely(qc->nbytes & 15))
4684 if (ap->ops->check_atapi_dma)
4685 return ap->ops->check_atapi_dma(qc);
4691 * ata_std_qc_defer - Check whether a qc needs to be deferred
4692 * @qc: ATA command in question
4694 * Non-NCQ commands cannot run with any other command, NCQ or
4695 * not. As upper layer only knows the queue depth, we are
4696 * responsible for maintaining exclusion. This function checks
4697 * whether a new command @qc can be issued.
4700 * spin_lock_irqsave(host lock)
4703 * ATA_DEFER_* if deferring is needed, 0 otherwise.
4705 int ata_std_qc_defer(struct ata_queued_cmd *qc)
4707 struct ata_link *link = qc->dev->link;
4709 if (qc->tf.protocol == ATA_PROT_NCQ) {
4710 if (!ata_tag_valid(link->active_tag))
4713 if (!ata_tag_valid(link->active_tag) && !link->sactive)
4717 return ATA_DEFER_LINK;
4720 enum ata_completion_errors ata_noop_qc_prep(struct ata_queued_cmd *qc)
4726 * ata_sg_init - Associate command with scatter-gather table.
4727 * @qc: Command to be associated
4728 * @sg: Scatter-gather table.
4729 * @n_elem: Number of elements in s/g table.
4731 * Initialize the data-related elements of queued_cmd @qc
4732 * to point to a scatter-gather table @sg, containing @n_elem
4736 * spin_lock_irqsave(host lock)
4738 void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
4739 unsigned int n_elem)
4742 qc->n_elem = n_elem;
4747 * ata_sg_setup - DMA-map the scatter-gather table associated with a command.
4748 * @qc: Command with scatter-gather table to be mapped.
4750 * DMA-map the scatter-gather table associated with queued_cmd @qc.
4753 * spin_lock_irqsave(host lock)
4756 * Zero on success, negative on error.
4759 static int ata_sg_setup(struct ata_queued_cmd *qc)
4761 struct ata_port *ap = qc->ap;
4762 unsigned int n_elem;
4764 VPRINTK("ENTER, ata%u\n", ap->print_id);
4766 n_elem = dma_map_sg(ap->dev, qc->sg, qc->n_elem, qc->dma_dir);
4770 DPRINTK("%d sg elements mapped\n", n_elem);
4771 qc->orig_n_elem = qc->n_elem;
4772 qc->n_elem = n_elem;
4773 qc->flags |= ATA_QCFLAG_DMAMAP;
4779 * swap_buf_le16 - swap halves of 16-bit words in place
4780 * @buf: Buffer to swap
4781 * @buf_words: Number of 16-bit words in buffer.
4783 * Swap halves of 16-bit words if needed to convert from
4784 * little-endian byte order to native cpu byte order, or
4788 * Inherited from caller.
4790 void swap_buf_le16(u16 *buf, unsigned int buf_words)
4795 for (i = 0; i < buf_words; i++)
4796 buf[i] = le16_to_cpu(buf[i]);
4797 #endif /* __BIG_ENDIAN */
4801 * ata_qc_new_init - Request an available ATA command, and initialize it
4802 * @dev: Device from whom we request an available command structure
4809 struct ata_queued_cmd *ata_qc_new_init(struct ata_device *dev, int tag)
4811 struct ata_port *ap = dev->link->ap;
4812 struct ata_queued_cmd *qc;
4814 /* no command while frozen */
4815 if (unlikely(ap->pflags & ATA_PFLAG_FROZEN))
4819 if (ap->flags & ATA_FLAG_SAS_HOST) {
4820 tag = ata_sas_allocate_tag(ap);
4825 qc = __ata_qc_from_tag(ap, tag);
4837 * ata_qc_free - free unused ata_queued_cmd
4838 * @qc: Command to complete
4840 * Designed to free unused ata_queued_cmd object
4841 * in case something prevents using it.
4844 * spin_lock_irqsave(host lock)
4846 void ata_qc_free(struct ata_queued_cmd *qc)
4848 struct ata_port *ap;
4851 WARN_ON_ONCE(qc == NULL); /* ata_qc_from_tag _might_ return NULL */
4856 if (likely(ata_tag_valid(tag))) {
4857 qc->tag = ATA_TAG_POISON;
4858 if (ap->flags & ATA_FLAG_SAS_HOST)
4859 ata_sas_free_tag(tag, ap);
4863 void __ata_qc_complete(struct ata_queued_cmd *qc)
4865 struct ata_port *ap;
4866 struct ata_link *link;
4868 WARN_ON_ONCE(qc == NULL); /* ata_qc_from_tag _might_ return NULL */
4869 WARN_ON_ONCE(!(qc->flags & ATA_QCFLAG_ACTIVE));
4871 link = qc->dev->link;
4873 if (likely(qc->flags & ATA_QCFLAG_DMAMAP))
4876 /* command should be marked inactive atomically with qc completion */
4877 if (qc->tf.protocol == ATA_PROT_NCQ) {
4878 link->sactive &= ~(1 << qc->tag);
4880 ap->nr_active_links--;
4882 link->active_tag = ATA_TAG_POISON;
4883 ap->nr_active_links--;
4886 /* clear exclusive status */
4887 if (unlikely(qc->flags & ATA_QCFLAG_CLEAR_EXCL &&
4888 ap->excl_link == link))
4889 ap->excl_link = NULL;
4891 /* atapi: mark qc as inactive to prevent the interrupt handler
4892 * from completing the command twice later, before the error handler
4893 * is called. (when rc != 0 and atapi request sense is needed)
4895 qc->flags &= ~ATA_QCFLAG_ACTIVE;
4896 ap->qc_active &= ~(1 << qc->tag);
4898 /* call completion callback */
4899 qc->complete_fn(qc);
4902 static void fill_result_tf(struct ata_queued_cmd *qc)
4904 struct ata_port *ap = qc->ap;
4906 qc->result_tf.flags = qc->tf.flags;
4907 ap->ops->qc_fill_rtf(qc);
4910 static void ata_verify_xfer(struct ata_queued_cmd *qc)
4912 struct ata_device *dev = qc->dev;
4914 if (ata_is_nodata(qc->tf.protocol))
4917 if ((dev->mwdma_mask || dev->udma_mask) && ata_is_pio(qc->tf.protocol))
4920 dev->flags &= ~ATA_DFLAG_DUBIOUS_XFER;
4924 * ata_qc_complete - Complete an active ATA command
4925 * @qc: Command to complete
4927 * Indicate to the mid and upper layers that an ATA command has
4928 * completed, with either an ok or not-ok status.
4930 * Refrain from calling this function multiple times when
4931 * successfully completing multiple NCQ commands.
4932 * ata_qc_complete_multiple() should be used instead, which will
4933 * properly update IRQ expect state.
4936 * spin_lock_irqsave(host lock)
4938 void ata_qc_complete(struct ata_queued_cmd *qc)
4940 struct ata_port *ap = qc->ap;
4942 /* XXX: New EH and old EH use different mechanisms to
4943 * synchronize EH with regular execution path.
4945 * In new EH, a failed qc is marked with ATA_QCFLAG_FAILED.
4946 * Normal execution path is responsible for not accessing a
4947 * failed qc. libata core enforces the rule by returning NULL
4948 * from ata_qc_from_tag() for failed qcs.
4950 * Old EH depends on ata_qc_complete() nullifying completion
4951 * requests if ATA_QCFLAG_EH_SCHEDULED is set. Old EH does
4952 * not synchronize with interrupt handler. Only PIO task is
4955 if (ap->ops->error_handler) {
4956 struct ata_device *dev = qc->dev;
4957 struct ata_eh_info *ehi = &dev->link->eh_info;
4959 if (unlikely(qc->err_mask))
4960 qc->flags |= ATA_QCFLAG_FAILED;
4963 * Finish internal commands without any further processing
4964 * and always with the result TF filled.
4966 if (unlikely(ata_tag_internal(qc->tag))) {
4968 trace_ata_qc_complete_internal(qc);
4969 __ata_qc_complete(qc);
4974 * Non-internal qc has failed. Fill the result TF and
4977 if (unlikely(qc->flags & ATA_QCFLAG_FAILED)) {
4979 trace_ata_qc_complete_failed(qc);
4980 ata_qc_schedule_eh(qc);
4984 WARN_ON_ONCE(ap->pflags & ATA_PFLAG_FROZEN);
4986 /* read result TF if requested */
4987 if (qc->flags & ATA_QCFLAG_RESULT_TF)
4990 trace_ata_qc_complete_done(qc);
4991 /* Some commands need post-processing after successful
4994 switch (qc->tf.command) {
4995 case ATA_CMD_SET_FEATURES:
4996 if (qc->tf.feature != SETFEATURES_WC_ON &&
4997 qc->tf.feature != SETFEATURES_WC_OFF)
5000 case ATA_CMD_INIT_DEV_PARAMS: /* CHS translation changed */
5001 case ATA_CMD_SET_MULTI: /* multi_count changed */
5002 /* revalidate device */
5003 ehi->dev_action[dev->devno] |= ATA_EH_REVALIDATE;
5004 ata_port_schedule_eh(ap);
5008 dev->flags |= ATA_DFLAG_SLEEPING;
5012 if (unlikely(dev->flags & ATA_DFLAG_DUBIOUS_XFER))
5013 ata_verify_xfer(qc);
5015 __ata_qc_complete(qc);
5017 if (qc->flags & ATA_QCFLAG_EH_SCHEDULED)
5020 /* read result TF if failed or requested */
5021 if (qc->err_mask || qc->flags & ATA_QCFLAG_RESULT_TF)
5024 __ata_qc_complete(qc);
5029 * ata_qc_complete_multiple - Complete multiple qcs successfully
5030 * @ap: port in question
5031 * @qc_active: new qc_active mask
5033 * Complete in-flight commands. This functions is meant to be
5034 * called from low-level driver's interrupt routine to complete
5035 * requests normally. ap->qc_active and @qc_active is compared
5036 * and commands are completed accordingly.
5038 * Always use this function when completing multiple NCQ commands
5039 * from IRQ handlers instead of calling ata_qc_complete()
5040 * multiple times to keep IRQ expect status properly in sync.
5043 * spin_lock_irqsave(host lock)
5046 * Number of completed commands on success, -errno otherwise.
5048 int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active)
5053 done_mask = ap->qc_active ^ qc_active;
5055 if (unlikely(done_mask & qc_active)) {
5056 ata_port_err(ap, "illegal qc_active transition (%08x->%08x)\n",
5057 ap->qc_active, qc_active);
5062 struct ata_queued_cmd *qc;
5063 unsigned int tag = __ffs(done_mask);
5065 qc = ata_qc_from_tag(ap, tag);
5067 ata_qc_complete(qc);
5070 done_mask &= ~(1 << tag);
5077 * ata_qc_issue - issue taskfile to device
5078 * @qc: command to issue to device
5080 * Prepare an ATA command to submission to device.
5081 * This includes mapping the data into a DMA-able
5082 * area, filling in the S/G table, and finally
5083 * writing the taskfile to hardware, starting the command.
5086 * spin_lock_irqsave(host lock)
5088 void ata_qc_issue(struct ata_queued_cmd *qc)
5090 struct ata_port *ap = qc->ap;
5091 struct ata_link *link = qc->dev->link;
5092 u8 prot = qc->tf.protocol;
5094 /* Make sure only one non-NCQ command is outstanding. The
5095 * check is skipped for old EH because it reuses active qc to
5096 * request ATAPI sense.
5098 WARN_ON_ONCE(ap->ops->error_handler && ata_tag_valid(link->active_tag));
5100 if (ata_is_ncq(prot)) {
5101 WARN_ON_ONCE(link->sactive & (1 << qc->tag));
5104 ap->nr_active_links++;
5105 link->sactive |= 1 << qc->tag;
5107 WARN_ON_ONCE(link->sactive);
5109 ap->nr_active_links++;
5110 link->active_tag = qc->tag;
5113 qc->flags |= ATA_QCFLAG_ACTIVE;
5114 ap->qc_active |= 1 << qc->tag;
5117 * We guarantee to LLDs that they will have at least one
5118 * non-zero sg if the command is a data command.
5120 if (ata_is_data(prot) && (!qc->sg || !qc->n_elem || !qc->nbytes))
5123 if (ata_is_dma(prot) || (ata_is_pio(prot) &&
5124 (ap->flags & ATA_FLAG_PIO_DMA)))
5125 if (ata_sg_setup(qc))
5128 /* if device is sleeping, schedule reset and abort the link */
5129 if (unlikely(qc->dev->flags & ATA_DFLAG_SLEEPING)) {
5130 link->eh_info.action |= ATA_EH_RESET;
5131 ata_ehi_push_desc(&link->eh_info, "waking up from sleep");
5132 ata_link_abort(link);
5136 qc->err_mask |= ap->ops->qc_prep(qc);
5137 if (unlikely(qc->err_mask))
5139 trace_ata_qc_issue(qc);
5140 qc->err_mask |= ap->ops->qc_issue(qc);
5141 if (unlikely(qc->err_mask))
5146 qc->err_mask |= AC_ERR_SYSTEM;
5148 ata_qc_complete(qc);
5152 * sata_scr_valid - test whether SCRs are accessible
5153 * @link: ATA link to test SCR accessibility for
5155 * Test whether SCRs are accessible for @link.
5161 * 1 if SCRs are accessible, 0 otherwise.
5163 int sata_scr_valid(struct ata_link *link)
5165 struct ata_port *ap = link->ap;
5167 return (ap->flags & ATA_FLAG_SATA) && ap->ops->scr_read;
5171 * sata_scr_read - read SCR register of the specified port
5172 * @link: ATA link to read SCR for
5174 * @val: Place to store read value
5176 * Read SCR register @reg of @link into *@val. This function is
5177 * guaranteed to succeed if @link is ap->link, the cable type of
5178 * the port is SATA and the port implements ->scr_read.
5181 * None if @link is ap->link. Kernel thread context otherwise.
5184 * 0 on success, negative errno on failure.
5186 int sata_scr_read(struct ata_link *link, int reg, u32 *val)
5188 if (ata_is_host_link(link)) {
5189 if (sata_scr_valid(link))
5190 return link->ap->ops->scr_read(link, reg, val);
5194 return sata_pmp_scr_read(link, reg, val);
5198 * sata_scr_write - write SCR register of the specified port
5199 * @link: ATA link to write SCR for
5200 * @reg: SCR to write
5201 * @val: value to write
5203 * Write @val to SCR register @reg of @link. This function is
5204 * guaranteed to succeed if @link is ap->link, the cable type of
5205 * the port is SATA and the port implements ->scr_read.
5208 * None if @link is ap->link. Kernel thread context otherwise.
5211 * 0 on success, negative errno on failure.
5213 int sata_scr_write(struct ata_link *link, int reg, u32 val)
5215 if (ata_is_host_link(link)) {
5216 if (sata_scr_valid(link))
5217 return link->ap->ops->scr_write(link, reg, val);
5221 return sata_pmp_scr_write(link, reg, val);
5225 * sata_scr_write_flush - write SCR register of the specified port and flush
5226 * @link: ATA link to write SCR for
5227 * @reg: SCR to write
5228 * @val: value to write
5230 * This function is identical to sata_scr_write() except that this
5231 * function performs flush after writing to the register.
5234 * None if @link is ap->link. Kernel thread context otherwise.
5237 * 0 on success, negative errno on failure.
5239 int sata_scr_write_flush(struct ata_link *link, int reg, u32 val)
5241 if (ata_is_host_link(link)) {
5244 if (sata_scr_valid(link)) {
5245 rc = link->ap->ops->scr_write(link, reg, val);
5247 rc = link->ap->ops->scr_read(link, reg, &val);
5253 return sata_pmp_scr_write(link, reg, val);
5257 * ata_phys_link_online - test whether the given link is online
5258 * @link: ATA link to test
5260 * Test whether @link is online. Note that this function returns
5261 * 0 if online status of @link cannot be obtained, so
5262 * ata_link_online(link) != !ata_link_offline(link).
5268 * True if the port online status is available and online.
5270 bool ata_phys_link_online(struct ata_link *link)
5274 if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0 &&
5275 ata_sstatus_online(sstatus))
5281 * ata_phys_link_offline - test whether the given link is offline
5282 * @link: ATA link to test
5284 * Test whether @link is offline. Note that this function
5285 * returns 0 if offline status of @link cannot be obtained, so
5286 * ata_link_online(link) != !ata_link_offline(link).
5292 * True if the port offline status is available and offline.
5294 bool ata_phys_link_offline(struct ata_link *link)
5298 if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0 &&
5299 !ata_sstatus_online(sstatus))
5305 * ata_link_online - test whether the given link is online
5306 * @link: ATA link to test
5308 * Test whether @link is online. This is identical to
5309 * ata_phys_link_online() when there's no slave link. When
5310 * there's a slave link, this function should only be called on
5311 * the master link and will return true if any of M/S links is
5318 * True if the port online status is available and online.
5320 bool ata_link_online(struct ata_link *link)
5322 struct ata_link *slave = link->ap->slave_link;
5324 WARN_ON(link == slave); /* shouldn't be called on slave link */
5326 return ata_phys_link_online(link) ||
5327 (slave && ata_phys_link_online(slave));
5331 * ata_link_offline - test whether the given link is offline
5332 * @link: ATA link to test
5334 * Test whether @link is offline. This is identical to
5335 * ata_phys_link_offline() when there's no slave link. When
5336 * there's a slave link, this function should only be called on
5337 * the master link and will return true if both M/S links are
5344 * True if the port offline status is available and offline.
5346 bool ata_link_offline(struct ata_link *link)
5348 struct ata_link *slave = link->ap->slave_link;
5350 WARN_ON(link == slave); /* shouldn't be called on slave link */
5352 return ata_phys_link_offline(link) &&
5353 (!slave || ata_phys_link_offline(slave));
5357 static void ata_port_request_pm(struct ata_port *ap, pm_message_t mesg,
5358 unsigned int action, unsigned int ehi_flags,
5361 struct ata_link *link;
5362 unsigned long flags;
5364 /* Previous resume operation might still be in
5365 * progress. Wait for PM_PENDING to clear.
5367 if (ap->pflags & ATA_PFLAG_PM_PENDING) {
5368 ata_port_wait_eh(ap);
5369 WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING);
5372 /* request PM ops to EH */
5373 spin_lock_irqsave(ap->lock, flags);
5376 ap->pflags |= ATA_PFLAG_PM_PENDING;
5377 ata_for_each_link(link, ap, HOST_FIRST) {
5378 link->eh_info.action |= action;
5379 link->eh_info.flags |= ehi_flags;
5382 ata_port_schedule_eh(ap);
5384 spin_unlock_irqrestore(ap->lock, flags);
5387 ata_port_wait_eh(ap);
5388 WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING);
5393 * On some hardware, device fails to respond after spun down for suspend. As
5394 * the device won't be used before being resumed, we don't need to touch the
5395 * device. Ask EH to skip the usual stuff and proceed directly to suspend.
5397 * http://thread.gmane.org/gmane.linux.ide/46764
5399 static const unsigned int ata_port_suspend_ehi = ATA_EHI_QUIET
5400 | ATA_EHI_NO_AUTOPSY
5401 | ATA_EHI_NO_RECOVERY;
5403 static void ata_port_suspend(struct ata_port *ap, pm_message_t mesg)
5405 ata_port_request_pm(ap, mesg, 0, ata_port_suspend_ehi, false);
5408 static void ata_port_suspend_async(struct ata_port *ap, pm_message_t mesg)
5410 ata_port_request_pm(ap, mesg, 0, ata_port_suspend_ehi, true);
5413 static int ata_port_pm_suspend(struct device *dev)
5415 struct ata_port *ap = to_ata_port(dev);
5417 if (pm_runtime_suspended(dev))
5420 ata_port_suspend(ap, PMSG_SUSPEND);
5424 static int ata_port_pm_freeze(struct device *dev)
5426 struct ata_port *ap = to_ata_port(dev);
5428 if (pm_runtime_suspended(dev))
5431 ata_port_suspend(ap, PMSG_FREEZE);
5435 static int ata_port_pm_poweroff(struct device *dev)
5437 ata_port_suspend(to_ata_port(dev), PMSG_HIBERNATE);
5441 static const unsigned int ata_port_resume_ehi = ATA_EHI_NO_AUTOPSY
5444 static void ata_port_resume(struct ata_port *ap, pm_message_t mesg)
5446 ata_port_request_pm(ap, mesg, ATA_EH_RESET, ata_port_resume_ehi, false);
5449 static void ata_port_resume_async(struct ata_port *ap, pm_message_t mesg)
5451 ata_port_request_pm(ap, mesg, ATA_EH_RESET, ata_port_resume_ehi, true);
5454 static int ata_port_pm_resume(struct device *dev)
5456 ata_port_resume_async(to_ata_port(dev), PMSG_RESUME);
5457 pm_runtime_disable(dev);
5458 pm_runtime_set_active(dev);
5459 pm_runtime_enable(dev);
5464 * For ODDs, the upper layer will poll for media change every few seconds,
5465 * which will make it enter and leave suspend state every few seconds. And
5466 * as each suspend will cause a hard/soft reset, the gain of runtime suspend
5467 * is very little and the ODD may malfunction after constantly being reset.
5468 * So the idle callback here will not proceed to suspend if a non-ZPODD capable
5469 * ODD is attached to the port.
5471 static int ata_port_runtime_idle(struct device *dev)
5473 struct ata_port *ap = to_ata_port(dev);
5474 struct ata_link *link;
5475 struct ata_device *adev;
5477 ata_for_each_link(link, ap, HOST_FIRST) {
5478 ata_for_each_dev(adev, link, ENABLED)
5479 if (adev->class == ATA_DEV_ATAPI &&
5480 !zpodd_dev_enabled(adev))
5487 static int ata_port_runtime_suspend(struct device *dev)
5489 ata_port_suspend(to_ata_port(dev), PMSG_AUTO_SUSPEND);
5493 static int ata_port_runtime_resume(struct device *dev)
5495 ata_port_resume(to_ata_port(dev), PMSG_AUTO_RESUME);
5499 static const struct dev_pm_ops ata_port_pm_ops = {
5500 .suspend = ata_port_pm_suspend,
5501 .resume = ata_port_pm_resume,
5502 .freeze = ata_port_pm_freeze,
5503 .thaw = ata_port_pm_resume,
5504 .poweroff = ata_port_pm_poweroff,
5505 .restore = ata_port_pm_resume,
5507 .runtime_suspend = ata_port_runtime_suspend,
5508 .runtime_resume = ata_port_runtime_resume,
5509 .runtime_idle = ata_port_runtime_idle,
5512 /* sas ports don't participate in pm runtime management of ata_ports,
5513 * and need to resume ata devices at the domain level, not the per-port
5514 * level. sas suspend/resume is async to allow parallel port recovery
5515 * since sas has multiple ata_port instances per Scsi_Host.
5517 void ata_sas_port_suspend(struct ata_port *ap)
5519 ata_port_suspend_async(ap, PMSG_SUSPEND);
5521 EXPORT_SYMBOL_GPL(ata_sas_port_suspend);
5523 void ata_sas_port_resume(struct ata_port *ap)
5525 ata_port_resume_async(ap, PMSG_RESUME);
5527 EXPORT_SYMBOL_GPL(ata_sas_port_resume);
5530 * ata_host_suspend - suspend host
5531 * @host: host to suspend
5534 * Suspend @host. Actual operation is performed by port suspend.
5536 int ata_host_suspend(struct ata_host *host, pm_message_t mesg)
5538 host->dev->power.power_state = mesg;
5543 * ata_host_resume - resume host
5544 * @host: host to resume
5546 * Resume @host. Actual operation is performed by port resume.
5548 void ata_host_resume(struct ata_host *host)
5550 host->dev->power.power_state = PMSG_ON;
5554 struct device_type ata_port_type = {
5557 .pm = &ata_port_pm_ops,
5562 * ata_dev_init - Initialize an ata_device structure
5563 * @dev: Device structure to initialize
5565 * Initialize @dev in preparation for probing.
5568 * Inherited from caller.
5570 void ata_dev_init(struct ata_device *dev)
5572 struct ata_link *link = ata_dev_phys_link(dev);
5573 struct ata_port *ap = link->ap;
5574 unsigned long flags;
5576 /* SATA spd limit is bound to the attached device, reset together */
5577 link->sata_spd_limit = link->hw_sata_spd_limit;
5580 /* High bits of dev->flags are used to record warm plug
5581 * requests which occur asynchronously. Synchronize using
5584 spin_lock_irqsave(ap->lock, flags);
5585 dev->flags &= ~ATA_DFLAG_INIT_MASK;
5587 spin_unlock_irqrestore(ap->lock, flags);
5589 memset((void *)dev + ATA_DEVICE_CLEAR_BEGIN, 0,
5590 ATA_DEVICE_CLEAR_END - ATA_DEVICE_CLEAR_BEGIN);
5591 dev->pio_mask = UINT_MAX;
5592 dev->mwdma_mask = UINT_MAX;
5593 dev->udma_mask = UINT_MAX;
5597 * ata_link_init - Initialize an ata_link structure
5598 * @ap: ATA port link is attached to
5599 * @link: Link structure to initialize
5600 * @pmp: Port multiplier port number
5605 * Kernel thread context (may sleep)
5607 void ata_link_init(struct ata_port *ap, struct ata_link *link, int pmp)
5611 /* clear everything except for devices */
5612 memset((void *)link + ATA_LINK_CLEAR_BEGIN, 0,
5613 ATA_LINK_CLEAR_END - ATA_LINK_CLEAR_BEGIN);
5617 link->active_tag = ATA_TAG_POISON;
5618 link->hw_sata_spd_limit = UINT_MAX;
5620 /* can't use iterator, ap isn't initialized yet */
5621 for (i = 0; i < ATA_MAX_DEVICES; i++) {
5622 struct ata_device *dev = &link->device[i];
5625 dev->devno = dev - link->device;
5626 #ifdef CONFIG_ATA_ACPI
5627 dev->gtf_filter = ata_acpi_gtf_filter;
5634 * sata_link_init_spd - Initialize link->sata_spd_limit
5635 * @link: Link to configure sata_spd_limit for
5637 * Initialize @link->[hw_]sata_spd_limit to the currently
5641 * Kernel thread context (may sleep).
5644 * 0 on success, -errno on failure.
5646 int sata_link_init_spd(struct ata_link *link)
5651 rc = sata_scr_read(link, SCR_CONTROL, &link->saved_scontrol);
5655 spd = (link->saved_scontrol >> 4) & 0xf;
5657 link->hw_sata_spd_limit &= (1 << spd) - 1;
5659 ata_force_link_limits(link);
5661 link->sata_spd_limit = link->hw_sata_spd_limit;
5667 * ata_port_alloc - allocate and initialize basic ATA port resources
5668 * @host: ATA host this allocated port belongs to
5670 * Allocate and initialize basic ATA port resources.
5673 * Allocate ATA port on success, NULL on failure.
5676 * Inherited from calling layer (may sleep).
5678 struct ata_port *ata_port_alloc(struct ata_host *host)
5680 struct ata_port *ap;
5684 ap = kzalloc(sizeof(*ap), GFP_KERNEL);
5688 ap->pflags |= ATA_PFLAG_INITIALIZING | ATA_PFLAG_FROZEN;
5689 ap->lock = &host->lock;
5691 ap->local_port_no = -1;
5693 ap->dev = host->dev;
5695 #if defined(ATA_VERBOSE_DEBUG)
5696 /* turn on all debugging levels */
5697 ap->msg_enable = 0x00FF;
5698 #elif defined(ATA_DEBUG)
5699 ap->msg_enable = ATA_MSG_DRV | ATA_MSG_INFO | ATA_MSG_CTL | ATA_MSG_WARN | ATA_MSG_ERR;
5701 ap->msg_enable = ATA_MSG_DRV | ATA_MSG_ERR | ATA_MSG_WARN;
5704 mutex_init(&ap->scsi_scan_mutex);
5705 INIT_DELAYED_WORK(&ap->hotplug_task, ata_scsi_hotplug);
5706 INIT_WORK(&ap->scsi_rescan_task, ata_scsi_dev_rescan);
5707 INIT_LIST_HEAD(&ap->eh_done_q);
5708 init_waitqueue_head(&ap->eh_wait_q);
5709 init_completion(&ap->park_req_pending);
5710 init_timer_deferrable(&ap->fastdrain_timer);
5711 ap->fastdrain_timer.function = ata_eh_fastdrain_timerfn;
5712 ap->fastdrain_timer.data = (unsigned long)ap;
5714 ap->cbl = ATA_CBL_NONE;
5716 ata_link_init(ap, &ap->link, 0);
5719 ap->stats.unhandled_irq = 1;
5720 ap->stats.idle_irq = 1;
5722 ata_sff_port_init(ap);
5727 static void ata_host_release(struct device *gendev, void *res)
5729 struct ata_host *host = dev_get_drvdata(gendev);
5732 for (i = 0; i < host->n_ports; i++) {
5733 struct ata_port *ap = host->ports[i];
5739 scsi_host_put(ap->scsi_host);
5741 kfree(ap->pmp_link);
5742 kfree(ap->slave_link);
5744 host->ports[i] = NULL;
5747 dev_set_drvdata(gendev, NULL);
5751 * ata_host_alloc - allocate and init basic ATA host resources
5752 * @dev: generic device this host is associated with
5753 * @max_ports: maximum number of ATA ports associated with this host
5755 * Allocate and initialize basic ATA host resources. LLD calls
5756 * this function to allocate a host, initializes it fully and
5757 * attaches it using ata_host_register().
5759 * @max_ports ports are allocated and host->n_ports is
5760 * initialized to @max_ports. The caller is allowed to decrease
5761 * host->n_ports before calling ata_host_register(). The unused
5762 * ports will be automatically freed on registration.
5765 * Allocate ATA host on success, NULL on failure.
5768 * Inherited from calling layer (may sleep).
5770 struct ata_host *ata_host_alloc(struct device *dev, int max_ports)
5772 struct ata_host *host;
5778 if (!devres_open_group(dev, NULL, GFP_KERNEL))
5781 /* alloc a container for our list of ATA ports (buses) */
5782 sz = sizeof(struct ata_host) + (max_ports + 1) * sizeof(void *);
5783 /* alloc a container for our list of ATA ports (buses) */
5784 host = devres_alloc(ata_host_release, sz, GFP_KERNEL);
5788 devres_add(dev, host);
5789 dev_set_drvdata(dev, host);
5791 spin_lock_init(&host->lock);
5792 mutex_init(&host->eh_mutex);
5794 host->n_ports = max_ports;
5796 /* allocate ports bound to this host */
5797 for (i = 0; i < max_ports; i++) {
5798 struct ata_port *ap;
5800 ap = ata_port_alloc(host);
5805 host->ports[i] = ap;
5808 devres_remove_group(dev, NULL);
5812 devres_release_group(dev, NULL);
5817 * ata_host_alloc_pinfo - alloc host and init with port_info array
5818 * @dev: generic device this host is associated with
5819 * @ppi: array of ATA port_info to initialize host with
5820 * @n_ports: number of ATA ports attached to this host
5822 * Allocate ATA host and initialize with info from @ppi. If NULL
5823 * terminated, @ppi may contain fewer entries than @n_ports. The
5824 * last entry will be used for the remaining ports.
5827 * Allocate ATA host on success, NULL on failure.
5830 * Inherited from calling layer (may sleep).
5832 struct ata_host *ata_host_alloc_pinfo(struct device *dev,
5833 const struct ata_port_info * const * ppi,
5836 const struct ata_port_info *pi;
5837 struct ata_host *host;
5840 host = ata_host_alloc(dev, n_ports);
5844 for (i = 0, j = 0, pi = NULL; i < host->n_ports; i++) {
5845 struct ata_port *ap = host->ports[i];
5850 ap->pio_mask = pi->pio_mask;
5851 ap->mwdma_mask = pi->mwdma_mask;
5852 ap->udma_mask = pi->udma_mask;
5853 ap->flags |= pi->flags;
5854 ap->link.flags |= pi->link_flags;
5855 ap->ops = pi->port_ops;
5857 if (!host->ops && (pi->port_ops != &ata_dummy_port_ops))
5858 host->ops = pi->port_ops;
5865 * ata_slave_link_init - initialize slave link
5866 * @ap: port to initialize slave link for
5868 * Create and initialize slave link for @ap. This enables slave
5869 * link handling on the port.
5871 * In libata, a port contains links and a link contains devices.
5872 * There is single host link but if a PMP is attached to it,
5873 * there can be multiple fan-out links. On SATA, there's usually
5874 * a single device connected to a link but PATA and SATA
5875 * controllers emulating TF based interface can have two - master
5878 * However, there are a few controllers which don't fit into this
5879 * abstraction too well - SATA controllers which emulate TF
5880 * interface with both master and slave devices but also have
5881 * separate SCR register sets for each device. These controllers
5882 * need separate links for physical link handling
5883 * (e.g. onlineness, link speed) but should be treated like a
5884 * traditional M/S controller for everything else (e.g. command
5885 * issue, softreset).
5887 * slave_link is libata's way of handling this class of
5888 * controllers without impacting core layer too much. For
5889 * anything other than physical link handling, the default host
5890 * link is used for both master and slave. For physical link
5891 * handling, separate @ap->slave_link is used. All dirty details
5892 * are implemented inside libata core layer. From LLD's POV, the
5893 * only difference is that prereset, hardreset and postreset are
5894 * called once more for the slave link, so the reset sequence
5895 * looks like the following.
5897 * prereset(M) -> prereset(S) -> hardreset(M) -> hardreset(S) ->
5898 * softreset(M) -> postreset(M) -> postreset(S)
5900 * Note that softreset is called only for the master. Softreset
5901 * resets both M/S by definition, so SRST on master should handle
5902 * both (the standard method will work just fine).
5905 * Should be called before host is registered.
5908 * 0 on success, -errno on failure.
5910 int ata_slave_link_init(struct ata_port *ap)
5912 struct ata_link *link;
5914 WARN_ON(ap->slave_link);
5915 WARN_ON(ap->flags & ATA_FLAG_PMP);
5917 link = kzalloc(sizeof(*link), GFP_KERNEL);
5921 ata_link_init(ap, link, 1);
5922 ap->slave_link = link;
5926 static void ata_host_stop(struct device *gendev, void *res)
5928 struct ata_host *host = dev_get_drvdata(gendev);
5931 WARN_ON(!(host->flags & ATA_HOST_STARTED));
5933 for (i = 0; i < host->n_ports; i++) {
5934 struct ata_port *ap = host->ports[i];
5936 if (ap->ops->port_stop)
5937 ap->ops->port_stop(ap);
5940 if (host->ops->host_stop)
5941 host->ops->host_stop(host);
5945 * ata_finalize_port_ops - finalize ata_port_operations
5946 * @ops: ata_port_operations to finalize
5948 * An ata_port_operations can inherit from another ops and that
5949 * ops can again inherit from another. This can go on as many
5950 * times as necessary as long as there is no loop in the
5951 * inheritance chain.
5953 * Ops tables are finalized when the host is started. NULL or
5954 * unspecified entries are inherited from the closet ancestor
5955 * which has the method and the entry is populated with it.
5956 * After finalization, the ops table directly points to all the
5957 * methods and ->inherits is no longer necessary and cleared.
5959 * Using ATA_OP_NULL, inheriting ops can force a method to NULL.
5964 static void ata_finalize_port_ops(struct ata_port_operations *ops)
5966 static DEFINE_SPINLOCK(lock);
5967 const struct ata_port_operations *cur;
5968 void **begin = (void **)ops;
5969 void **end = (void **)&ops->inherits;
5972 if (!ops || !ops->inherits)
5977 for (cur = ops->inherits; cur; cur = cur->inherits) {
5978 void **inherit = (void **)cur;
5980 for (pp = begin; pp < end; pp++, inherit++)
5985 for (pp = begin; pp < end; pp++)
5989 ops->inherits = NULL;
5995 * ata_host_start - start and freeze ports of an ATA host
5996 * @host: ATA host to start ports for
5998 * Start and then freeze ports of @host. Started status is
5999 * recorded in host->flags, so this function can be called
6000 * multiple times. Ports are guaranteed to get started only
6001 * once. If host->ops isn't initialized yet, its set to the
6002 * first non-dummy port ops.
6005 * Inherited from calling layer (may sleep).
6008 * 0 if all ports are started successfully, -errno otherwise.
6010 int ata_host_start(struct ata_host *host)
6013 void *start_dr = NULL;
6016 if (host->flags & ATA_HOST_STARTED)
6019 ata_finalize_port_ops(host->ops);
6021 for (i = 0; i < host->n_ports; i++) {
6022 struct ata_port *ap = host->ports[i];
6024 ata_finalize_port_ops(ap->ops);
6026 if (!host->ops && !ata_port_is_dummy(ap))
6027 host->ops = ap->ops;
6029 if (ap->ops->port_stop)
6033 if (host->ops && host->ops->host_stop)
6037 start_dr = devres_alloc(ata_host_stop, 0, GFP_KERNEL);
6042 for (i = 0; i < host->n_ports; i++) {
6043 struct ata_port *ap = host->ports[i];
6045 if (ap->ops->port_start) {
6046 rc = ap->ops->port_start(ap);
6050 "failed to start port %d (errno=%d)\n",
6055 ata_eh_freeze_port(ap);
6059 devres_add(host->dev, start_dr);
6060 host->flags |= ATA_HOST_STARTED;
6065 struct ata_port *ap = host->ports[i];
6067 if (ap->ops->port_stop)
6068 ap->ops->port_stop(ap);
6070 devres_free(start_dr);
6075 * ata_sas_host_init - Initialize a host struct for sas (ipr, libsas)
6076 * @host: host to initialize
6077 * @dev: device host is attached to
6081 void ata_host_init(struct ata_host *host, struct device *dev,
6082 struct ata_port_operations *ops)
6084 spin_lock_init(&host->lock);
6085 mutex_init(&host->eh_mutex);
6086 host->n_tags = ATA_MAX_QUEUE - 1;
6091 void __ata_port_probe(struct ata_port *ap)
6093 struct ata_eh_info *ehi = &ap->link.eh_info;
6094 unsigned long flags;
6096 /* kick EH for boot probing */
6097 spin_lock_irqsave(ap->lock, flags);
6099 ehi->probe_mask |= ATA_ALL_DEVICES;
6100 ehi->action |= ATA_EH_RESET;
6101 ehi->flags |= ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET;
6103 ap->pflags &= ~ATA_PFLAG_INITIALIZING;
6104 ap->pflags |= ATA_PFLAG_LOADING;
6105 ata_port_schedule_eh(ap);
6107 spin_unlock_irqrestore(ap->lock, flags);
6110 int ata_port_probe(struct ata_port *ap)
6114 if (ap->ops->error_handler) {
6115 __ata_port_probe(ap);
6116 ata_port_wait_eh(ap);
6118 DPRINTK("ata%u: bus probe begin\n", ap->print_id);
6119 rc = ata_bus_probe(ap);
6120 DPRINTK("ata%u: bus probe end\n", ap->print_id);
6126 static void async_port_probe(void *data, async_cookie_t cookie)
6128 struct ata_port *ap = data;
6131 * If we're not allowed to scan this host in parallel,
6132 * we need to wait until all previous scans have completed
6133 * before going further.
6134 * Jeff Garzik says this is only within a controller, so we
6135 * don't need to wait for port 0, only for later ports.
6137 if (!(ap->host->flags & ATA_HOST_PARALLEL_SCAN) && ap->port_no != 0)
6138 async_synchronize_cookie(cookie);
6140 (void)ata_port_probe(ap);
6142 /* in order to keep device order, we need to synchronize at this point */
6143 async_synchronize_cookie(cookie);
6145 ata_scsi_scan_host(ap, 1);
6149 * ata_host_register - register initialized ATA host
6150 * @host: ATA host to register
6151 * @sht: template for SCSI host
6153 * Register initialized ATA host. @host is allocated using
6154 * ata_host_alloc() and fully initialized by LLD. This function
6155 * starts ports, registers @host with ATA and SCSI layers and
6156 * probe registered devices.
6159 * Inherited from calling layer (may sleep).
6162 * 0 on success, -errno otherwise.
6164 int ata_host_register(struct ata_host *host, struct scsi_host_template *sht)
6168 host->n_tags = clamp(sht->can_queue, 1, ATA_MAX_QUEUE - 1);
6170 /* host must have been started */
6171 if (!(host->flags & ATA_HOST_STARTED)) {
6172 dev_err(host->dev, "BUG: trying to register unstarted host\n");
6177 /* Blow away unused ports. This happens when LLD can't
6178 * determine the exact number of ports to allocate at
6181 for (i = host->n_ports; host->ports[i]; i++)
6182 kfree(host->ports[i]);
6184 /* give ports names and add SCSI hosts */
6185 for (i = 0; i < host->n_ports; i++) {
6186 host->ports[i]->print_id = atomic_inc_return(&ata_print_id);
6187 host->ports[i]->local_port_no = i + 1;
6190 /* Create associated sysfs transport objects */
6191 for (i = 0; i < host->n_ports; i++) {
6192 rc = ata_tport_add(host->dev,host->ports[i]);
6198 rc = ata_scsi_add_hosts(host, sht);
6202 /* set cable, sata_spd_limit and report */
6203 for (i = 0; i < host->n_ports; i++) {
6204 struct ata_port *ap = host->ports[i];
6205 unsigned long xfer_mask;
6207 /* set SATA cable type if still unset */
6208 if (ap->cbl == ATA_CBL_NONE && (ap->flags & ATA_FLAG_SATA))
6209 ap->cbl = ATA_CBL_SATA;
6211 /* init sata_spd_limit to the current value */
6212 sata_link_init_spd(&ap->link);
6214 sata_link_init_spd(ap->slave_link);
6216 /* print per-port info to dmesg */
6217 xfer_mask = ata_pack_xfermask(ap->pio_mask, ap->mwdma_mask,
6220 if (!ata_port_is_dummy(ap)) {
6221 ata_port_info(ap, "%cATA max %s %s\n",
6222 (ap->flags & ATA_FLAG_SATA) ? 'S' : 'P',
6223 ata_mode_string(xfer_mask),
6224 ap->link.eh_info.desc);
6225 ata_ehi_clear_desc(&ap->link.eh_info);
6227 ata_port_info(ap, "DUMMY\n");
6230 /* perform each probe asynchronously */
6231 for (i = 0; i < host->n_ports; i++) {
6232 struct ata_port *ap = host->ports[i];
6233 ap->cookie = async_schedule(async_port_probe, ap);
6240 ata_tport_delete(host->ports[i]);
6247 * ata_host_activate - start host, request IRQ and register it
6248 * @host: target ATA host
6249 * @irq: IRQ to request
6250 * @irq_handler: irq_handler used when requesting IRQ
6251 * @irq_flags: irq_flags used when requesting IRQ
6252 * @sht: scsi_host_template to use when registering the host
6254 * After allocating an ATA host and initializing it, most libata
6255 * LLDs perform three steps to activate the host - start host,
6256 * request IRQ and register it. This helper takes necessasry
6257 * arguments and performs the three steps in one go.
6259 * An invalid IRQ skips the IRQ registration and expects the host to
6260 * have set polling mode on the port. In this case, @irq_handler
6264 * Inherited from calling layer (may sleep).
6267 * 0 on success, -errno otherwise.
6269 int ata_host_activate(struct ata_host *host, int irq,
6270 irq_handler_t irq_handler, unsigned long irq_flags,
6271 struct scsi_host_template *sht)
6275 rc = ata_host_start(host);
6279 /* Special case for polling mode */
6281 WARN_ON(irq_handler);
6282 return ata_host_register(host, sht);
6285 rc = devm_request_irq(host->dev, irq, irq_handler, irq_flags,
6286 dev_name(host->dev), host);
6290 for (i = 0; i < host->n_ports; i++)
6291 ata_port_desc(host->ports[i], "irq %d", irq);
6293 rc = ata_host_register(host, sht);
6294 /* if failed, just free the IRQ and leave ports alone */
6296 devm_free_irq(host->dev, irq, host);
6302 * ata_port_detach - Detach ATA port in prepration of device removal
6303 * @ap: ATA port to be detached
6305 * Detach all ATA devices and the associated SCSI devices of @ap;
6306 * then, remove the associated SCSI host. @ap is guaranteed to
6307 * be quiescent on return from this function.
6310 * Kernel thread context (may sleep).
6312 static void ata_port_detach(struct ata_port *ap)
6314 unsigned long flags;
6315 struct ata_link *link;
6316 struct ata_device *dev;
6318 if (!ap->ops->error_handler)
6321 /* tell EH we're leaving & flush EH */
6322 spin_lock_irqsave(ap->lock, flags);
6323 ap->pflags |= ATA_PFLAG_UNLOADING;
6324 ata_port_schedule_eh(ap);
6325 spin_unlock_irqrestore(ap->lock, flags);
6327 /* wait till EH commits suicide */
6328 ata_port_wait_eh(ap);
6330 /* it better be dead now */
6331 WARN_ON(!(ap->pflags & ATA_PFLAG_UNLOADED));
6333 cancel_delayed_work_sync(&ap->hotplug_task);
6336 /* clean up zpodd on port removal */
6337 ata_for_each_link(link, ap, HOST_FIRST) {
6338 ata_for_each_dev(dev, link, ALL) {
6339 if (zpodd_dev_enabled(dev))
6345 for (i = 0; i < SATA_PMP_MAX_PORTS; i++)
6346 ata_tlink_delete(&ap->pmp_link[i]);
6348 /* remove the associated SCSI host */
6349 scsi_remove_host(ap->scsi_host);
6350 ata_tport_delete(ap);
6354 * ata_host_detach - Detach all ports of an ATA host
6355 * @host: Host to detach
6357 * Detach all ports of @host.
6360 * Kernel thread context (may sleep).
6362 void ata_host_detach(struct ata_host *host)
6366 for (i = 0; i < host->n_ports; i++) {
6367 /* Ensure ata_port probe has completed */
6368 async_synchronize_cookie(host->ports[i]->cookie + 1);
6369 ata_port_detach(host->ports[i]);
6372 /* the host is dead now, dissociate ACPI */
6373 ata_acpi_dissociate(host);
6379 * ata_pci_remove_one - PCI layer callback for device removal
6380 * @pdev: PCI device that was removed
6382 * PCI layer indicates to libata via this hook that hot-unplug or
6383 * module unload event has occurred. Detach all ports. Resource
6384 * release is handled via devres.
6387 * Inherited from PCI layer (may sleep).
6389 void ata_pci_remove_one(struct pci_dev *pdev)
6391 struct ata_host *host = pci_get_drvdata(pdev);
6393 ata_host_detach(host);
6396 /* move to PCI subsystem */
6397 int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits)
6399 unsigned long tmp = 0;
6401 switch (bits->width) {
6404 pci_read_config_byte(pdev, bits->reg, &tmp8);
6410 pci_read_config_word(pdev, bits->reg, &tmp16);
6416 pci_read_config_dword(pdev, bits->reg, &tmp32);
6427 return (tmp == bits->val) ? 1 : 0;
6431 void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg)
6433 pci_save_state(pdev);
6434 pci_disable_device(pdev);
6436 if (mesg.event & PM_EVENT_SLEEP)
6437 pci_set_power_state(pdev, PCI_D3hot);
6440 int ata_pci_device_do_resume(struct pci_dev *pdev)
6444 pci_set_power_state(pdev, PCI_D0);
6445 pci_restore_state(pdev);
6447 rc = pcim_enable_device(pdev);
6450 "failed to enable device after resume (%d)\n", rc);
6454 pci_set_master(pdev);
6458 int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg)
6460 struct ata_host *host = pci_get_drvdata(pdev);
6463 rc = ata_host_suspend(host, mesg);
6467 ata_pci_device_do_suspend(pdev, mesg);
6472 int ata_pci_device_resume(struct pci_dev *pdev)
6474 struct ata_host *host = pci_get_drvdata(pdev);
6477 rc = ata_pci_device_do_resume(pdev);
6479 ata_host_resume(host);
6482 #endif /* CONFIG_PM */
6484 #endif /* CONFIG_PCI */
6487 * ata_platform_remove_one - Platform layer callback for device removal
6488 * @pdev: Platform device that was removed
6490 * Platform layer indicates to libata via this hook that hot-unplug or
6491 * module unload event has occurred. Detach all ports. Resource
6492 * release is handled via devres.
6495 * Inherited from platform layer (may sleep).
6497 int ata_platform_remove_one(struct platform_device *pdev)
6499 struct ata_host *host = platform_get_drvdata(pdev);
6501 ata_host_detach(host);
6506 static int __init ata_parse_force_one(char **cur,
6507 struct ata_force_ent *force_ent,
6508 const char **reason)
6510 static const struct ata_force_param force_tbl[] __initconst = {
6511 { "40c", .cbl = ATA_CBL_PATA40 },
6512 { "80c", .cbl = ATA_CBL_PATA80 },
6513 { "short40c", .cbl = ATA_CBL_PATA40_SHORT },
6514 { "unk", .cbl = ATA_CBL_PATA_UNK },
6515 { "ign", .cbl = ATA_CBL_PATA_IGN },
6516 { "sata", .cbl = ATA_CBL_SATA },
6517 { "1.5Gbps", .spd_limit = 1 },
6518 { "3.0Gbps", .spd_limit = 2 },
6519 { "noncq", .horkage_on = ATA_HORKAGE_NONCQ },
6520 { "ncq", .horkage_off = ATA_HORKAGE_NONCQ },
6521 { "noncqtrim", .horkage_on = ATA_HORKAGE_NO_NCQ_TRIM },
6522 { "ncqtrim", .horkage_off = ATA_HORKAGE_NO_NCQ_TRIM },
6523 { "dump_id", .horkage_on = ATA_HORKAGE_DUMP_ID },
6524 { "pio0", .xfer_mask = 1 << (ATA_SHIFT_PIO + 0) },
6525 { "pio1", .xfer_mask = 1 << (ATA_SHIFT_PIO + 1) },
6526 { "pio2", .xfer_mask = 1 << (ATA_SHIFT_PIO + 2) },
6527 { "pio3", .xfer_mask = 1 << (ATA_SHIFT_PIO + 3) },
6528 { "pio4", .xfer_mask = 1 << (ATA_SHIFT_PIO + 4) },
6529 { "pio5", .xfer_mask = 1 << (ATA_SHIFT_PIO + 5) },
6530 { "pio6", .xfer_mask = 1 << (ATA_SHIFT_PIO + 6) },
6531 { "mwdma0", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 0) },
6532 { "mwdma1", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 1) },
6533 { "mwdma2", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 2) },
6534 { "mwdma3", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 3) },
6535 { "mwdma4", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 4) },
6536 { "udma0", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 0) },
6537 { "udma16", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 0) },
6538 { "udma/16", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 0) },
6539 { "udma1", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 1) },
6540 { "udma25", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 1) },
6541 { "udma/25", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 1) },
6542 { "udma2", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 2) },
6543 { "udma33", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 2) },
6544 { "udma/33", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 2) },
6545 { "udma3", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 3) },
6546 { "udma44", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 3) },
6547 { "udma/44", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 3) },
6548 { "udma4", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 4) },
6549 { "udma66", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 4) },
6550 { "udma/66", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 4) },
6551 { "udma5", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 5) },
6552 { "udma100", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 5) },
6553 { "udma/100", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 5) },
6554 { "udma6", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 6) },
6555 { "udma133", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 6) },
6556 { "udma/133", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 6) },
6557 { "udma7", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 7) },
6558 { "nohrst", .lflags = ATA_LFLAG_NO_HRST },
6559 { "nosrst", .lflags = ATA_LFLAG_NO_SRST },
6560 { "norst", .lflags = ATA_LFLAG_NO_HRST | ATA_LFLAG_NO_SRST },
6561 { "rstonce", .lflags = ATA_LFLAG_RST_ONCE },
6562 { "atapi_dmadir", .horkage_on = ATA_HORKAGE_ATAPI_DMADIR },
6563 { "disable", .horkage_on = ATA_HORKAGE_DISABLE },
6565 char *start = *cur, *p = *cur;
6566 char *id, *val, *endp;
6567 const struct ata_force_param *match_fp = NULL;
6568 int nr_matches = 0, i;
6570 /* find where this param ends and update *cur */
6571 while (*p != '\0' && *p != ',')
6582 p = strchr(start, ':');
6584 val = strstrip(start);
6589 id = strstrip(start);
6590 val = strstrip(p + 1);
6593 p = strchr(id, '.');
6596 force_ent->device = simple_strtoul(p, &endp, 10);
6597 if (p == endp || *endp != '\0') {
6598 *reason = "invalid device";
6603 force_ent->port = simple_strtoul(id, &endp, 10);
6604 if (p == endp || *endp != '\0') {
6605 *reason = "invalid port/link";
6610 /* parse val, allow shortcuts so that both 1.5 and 1.5Gbps work */
6611 for (i = 0; i < ARRAY_SIZE(force_tbl); i++) {
6612 const struct ata_force_param *fp = &force_tbl[i];
6614 if (strncasecmp(val, fp->name, strlen(val)))
6620 if (strcasecmp(val, fp->name) == 0) {
6627 *reason = "unknown value";
6630 if (nr_matches > 1) {
6631 *reason = "ambigious value";
6635 force_ent->param = *match_fp;
6640 static void __init ata_parse_force_param(void)
6642 int idx = 0, size = 1;
6643 int last_port = -1, last_device = -1;
6644 char *p, *cur, *next;
6646 /* calculate maximum number of params and allocate force_tbl */
6647 for (p = ata_force_param_buf; *p; p++)
6651 ata_force_tbl = kzalloc(sizeof(ata_force_tbl[0]) * size, GFP_KERNEL);
6652 if (!ata_force_tbl) {
6653 printk(KERN_WARNING "ata: failed to extend force table, "
6654 "libata.force ignored\n");
6658 /* parse and populate the table */
6659 for (cur = ata_force_param_buf; *cur != '\0'; cur = next) {
6660 const char *reason = "";
6661 struct ata_force_ent te = { .port = -1, .device = -1 };
6664 if (ata_parse_force_one(&next, &te, &reason)) {
6665 printk(KERN_WARNING "ata: failed to parse force "
6666 "parameter \"%s\" (%s)\n",
6671 if (te.port == -1) {
6672 te.port = last_port;
6673 te.device = last_device;
6676 ata_force_tbl[idx++] = te;
6678 last_port = te.port;
6679 last_device = te.device;
6682 ata_force_tbl_size = idx;
6685 static int __init ata_init(void)
6689 ata_parse_force_param();
6691 rc = ata_sff_init();
6693 kfree(ata_force_tbl);
6697 libata_transport_init();
6698 ata_scsi_transport_template = ata_attach_transport();
6699 if (!ata_scsi_transport_template) {
6705 printk(KERN_DEBUG "libata version " DRV_VERSION " loaded.\n");
6712 static void __exit ata_exit(void)
6714 ata_release_transport(ata_scsi_transport_template);
6715 libata_transport_exit();
6717 kfree(ata_force_tbl);
6720 subsys_initcall(ata_init);
6721 module_exit(ata_exit);
6723 static DEFINE_RATELIMIT_STATE(ratelimit, HZ / 5, 1);
6725 int ata_ratelimit(void)
6727 return __ratelimit(&ratelimit);
6731 * ata_msleep - ATA EH owner aware msleep
6732 * @ap: ATA port to attribute the sleep to
6733 * @msecs: duration to sleep in milliseconds
6735 * Sleeps @msecs. If the current task is owner of @ap's EH, the
6736 * ownership is released before going to sleep and reacquired
6737 * after the sleep is complete. IOW, other ports sharing the
6738 * @ap->host will be allowed to own the EH while this task is
6744 void ata_msleep(struct ata_port *ap, unsigned int msecs)
6746 bool owns_eh = ap && ap->host->eh_owner == current;
6758 * ata_wait_register - wait until register value changes
6759 * @ap: ATA port to wait register for, can be NULL
6760 * @reg: IO-mapped register
6761 * @mask: Mask to apply to read register value
6762 * @val: Wait condition
6763 * @interval: polling interval in milliseconds
6764 * @timeout: timeout in milliseconds
6766 * Waiting for some bits of register to change is a common
6767 * operation for ATA controllers. This function reads 32bit LE
6768 * IO-mapped register @reg and tests for the following condition.
6770 * (*@reg & mask) != val
6772 * If the condition is met, it returns; otherwise, the process is
6773 * repeated after @interval_msec until timeout.
6776 * Kernel thread context (may sleep)
6779 * The final register value.
6781 u32 ata_wait_register(struct ata_port *ap, void __iomem *reg, u32 mask, u32 val,
6782 unsigned long interval, unsigned long timeout)
6784 unsigned long deadline;
6787 tmp = ioread32(reg);
6789 /* Calculate timeout _after_ the first read to make sure
6790 * preceding writes reach the controller before starting to
6791 * eat away the timeout.
6793 deadline = ata_deadline(jiffies, timeout);
6795 while ((tmp & mask) == val && time_before(jiffies, deadline)) {
6796 ata_msleep(ap, interval);
6797 tmp = ioread32(reg);
6804 * sata_lpm_ignore_phy_events - test if PHY event should be ignored
6805 * @link: Link receiving the event
6807 * Test whether the received PHY event has to be ignored or not.
6813 * True if the event has to be ignored.
6815 bool sata_lpm_ignore_phy_events(struct ata_link *link)
6817 unsigned long lpm_timeout = link->last_lpm_change +
6818 msecs_to_jiffies(ATA_TMOUT_SPURIOUS_PHY);
6820 /* if LPM is enabled, PHYRDY doesn't mean anything */
6821 if (link->lpm_policy > ATA_LPM_MAX_POWER)
6824 /* ignore the first PHY event after the LPM policy changed
6825 * as it is might be spurious
6827 if ((link->flags & ATA_LFLAG_CHANGED) &&
6828 time_before(jiffies, lpm_timeout))
6833 EXPORT_SYMBOL_GPL(sata_lpm_ignore_phy_events);
6838 static unsigned int ata_dummy_qc_issue(struct ata_queued_cmd *qc)
6840 return AC_ERR_SYSTEM;
6843 static void ata_dummy_error_handler(struct ata_port *ap)
6848 struct ata_port_operations ata_dummy_port_ops = {
6849 .qc_prep = ata_noop_qc_prep,
6850 .qc_issue = ata_dummy_qc_issue,
6851 .error_handler = ata_dummy_error_handler,
6852 .sched_eh = ata_std_sched_eh,
6853 .end_eh = ata_std_end_eh,
6856 const struct ata_port_info ata_dummy_port_info = {
6857 .port_ops = &ata_dummy_port_ops,
6861 * Utility print functions
6863 void ata_port_printk(const struct ata_port *ap, const char *level,
6864 const char *fmt, ...)
6866 struct va_format vaf;
6869 va_start(args, fmt);
6874 printk("%sata%u: %pV", level, ap->print_id, &vaf);
6878 EXPORT_SYMBOL(ata_port_printk);
6880 void ata_link_printk(const struct ata_link *link, const char *level,
6881 const char *fmt, ...)
6883 struct va_format vaf;
6886 va_start(args, fmt);
6891 if (sata_pmp_attached(link->ap) || link->ap->slave_link)
6892 printk("%sata%u.%02u: %pV",
6893 level, link->ap->print_id, link->pmp, &vaf);
6895 printk("%sata%u: %pV",
6896 level, link->ap->print_id, &vaf);
6900 EXPORT_SYMBOL(ata_link_printk);
6902 void ata_dev_printk(const struct ata_device *dev, const char *level,
6903 const char *fmt, ...)
6905 struct va_format vaf;
6908 va_start(args, fmt);
6913 printk("%sata%u.%02u: %pV",
6914 level, dev->link->ap->print_id, dev->link->pmp + dev->devno,
6919 EXPORT_SYMBOL(ata_dev_printk);
6921 void ata_print_version(const struct device *dev, const char *version)
6923 dev_printk(KERN_DEBUG, dev, "version %s\n", version);
6925 EXPORT_SYMBOL(ata_print_version);
6928 * libata is essentially a library of internal helper functions for
6929 * low-level ATA host controller drivers. As such, the API/ABI is
6930 * likely to change as new drivers are added and updated.
6931 * Do not depend on ABI/API stability.
6933 EXPORT_SYMBOL_GPL(sata_deb_timing_normal);
6934 EXPORT_SYMBOL_GPL(sata_deb_timing_hotplug);
6935 EXPORT_SYMBOL_GPL(sata_deb_timing_long);
6936 EXPORT_SYMBOL_GPL(ata_base_port_ops);
6937 EXPORT_SYMBOL_GPL(sata_port_ops);
6938 EXPORT_SYMBOL_GPL(ata_dummy_port_ops);
6939 EXPORT_SYMBOL_GPL(ata_dummy_port_info);
6940 EXPORT_SYMBOL_GPL(ata_link_next);
6941 EXPORT_SYMBOL_GPL(ata_dev_next);
6942 EXPORT_SYMBOL_GPL(ata_std_bios_param);
6943 EXPORT_SYMBOL_GPL(ata_scsi_unlock_native_capacity);
6944 EXPORT_SYMBOL_GPL(ata_host_init);
6945 EXPORT_SYMBOL_GPL(ata_host_alloc);
6946 EXPORT_SYMBOL_GPL(ata_host_alloc_pinfo);
6947 EXPORT_SYMBOL_GPL(ata_slave_link_init);
6948 EXPORT_SYMBOL_GPL(ata_host_start);
6949 EXPORT_SYMBOL_GPL(ata_host_register);
6950 EXPORT_SYMBOL_GPL(ata_host_activate);
6951 EXPORT_SYMBOL_GPL(ata_host_detach);
6952 EXPORT_SYMBOL_GPL(ata_sg_init);
6953 EXPORT_SYMBOL_GPL(ata_qc_complete);
6954 EXPORT_SYMBOL_GPL(ata_qc_complete_multiple);
6955 EXPORT_SYMBOL_GPL(atapi_cmd_type);
6956 EXPORT_SYMBOL_GPL(ata_tf_to_fis);
6957 EXPORT_SYMBOL_GPL(ata_tf_from_fis);
6958 EXPORT_SYMBOL_GPL(ata_pack_xfermask);
6959 EXPORT_SYMBOL_GPL(ata_unpack_xfermask);
6960 EXPORT_SYMBOL_GPL(ata_xfer_mask2mode);
6961 EXPORT_SYMBOL_GPL(ata_xfer_mode2mask);
6962 EXPORT_SYMBOL_GPL(ata_xfer_mode2shift);
6963 EXPORT_SYMBOL_GPL(ata_mode_string);
6964 EXPORT_SYMBOL_GPL(ata_id_xfermask);
6965 EXPORT_SYMBOL_GPL(ata_do_set_mode);
6966 EXPORT_SYMBOL_GPL(ata_std_qc_defer);
6967 EXPORT_SYMBOL_GPL(ata_noop_qc_prep);
6968 EXPORT_SYMBOL_GPL(ata_dev_disable);
6969 EXPORT_SYMBOL_GPL(sata_set_spd);
6970 EXPORT_SYMBOL_GPL(ata_wait_after_reset);
6971 EXPORT_SYMBOL_GPL(sata_link_debounce);
6972 EXPORT_SYMBOL_GPL(sata_link_resume);
6973 EXPORT_SYMBOL_GPL(sata_link_scr_lpm);
6974 EXPORT_SYMBOL_GPL(ata_std_prereset);
6975 EXPORT_SYMBOL_GPL(sata_link_hardreset);
6976 EXPORT_SYMBOL_GPL(sata_std_hardreset);
6977 EXPORT_SYMBOL_GPL(ata_std_postreset);
6978 EXPORT_SYMBOL_GPL(ata_dev_classify);
6979 EXPORT_SYMBOL_GPL(ata_dev_pair);
6980 EXPORT_SYMBOL_GPL(ata_ratelimit);
6981 EXPORT_SYMBOL_GPL(ata_msleep);
6982 EXPORT_SYMBOL_GPL(ata_wait_register);
6983 EXPORT_SYMBOL_GPL(ata_scsi_queuecmd);
6984 EXPORT_SYMBOL_GPL(ata_scsi_slave_config);
6985 EXPORT_SYMBOL_GPL(ata_scsi_slave_destroy);
6986 EXPORT_SYMBOL_GPL(ata_scsi_change_queue_depth);
6987 EXPORT_SYMBOL_GPL(__ata_change_queue_depth);
6988 EXPORT_SYMBOL_GPL(sata_scr_valid);
6989 EXPORT_SYMBOL_GPL(sata_scr_read);
6990 EXPORT_SYMBOL_GPL(sata_scr_write);
6991 EXPORT_SYMBOL_GPL(sata_scr_write_flush);
6992 EXPORT_SYMBOL_GPL(ata_link_online);
6993 EXPORT_SYMBOL_GPL(ata_link_offline);
6995 EXPORT_SYMBOL_GPL(ata_host_suspend);
6996 EXPORT_SYMBOL_GPL(ata_host_resume);
6997 #endif /* CONFIG_PM */
6998 EXPORT_SYMBOL_GPL(ata_id_string);
6999 EXPORT_SYMBOL_GPL(ata_id_c_string);
7000 EXPORT_SYMBOL_GPL(ata_do_dev_read_id);
7001 EXPORT_SYMBOL_GPL(ata_scsi_simulate);
7003 EXPORT_SYMBOL_GPL(ata_pio_need_iordy);
7004 EXPORT_SYMBOL_GPL(ata_timing_find_mode);
7005 EXPORT_SYMBOL_GPL(ata_timing_compute);
7006 EXPORT_SYMBOL_GPL(ata_timing_merge);
7007 EXPORT_SYMBOL_GPL(ata_timing_cycle2mode);
7010 EXPORT_SYMBOL_GPL(pci_test_config_bits);
7011 EXPORT_SYMBOL_GPL(ata_pci_remove_one);
7013 EXPORT_SYMBOL_GPL(ata_pci_device_do_suspend);
7014 EXPORT_SYMBOL_GPL(ata_pci_device_do_resume);
7015 EXPORT_SYMBOL_GPL(ata_pci_device_suspend);
7016 EXPORT_SYMBOL_GPL(ata_pci_device_resume);
7017 #endif /* CONFIG_PM */
7018 #endif /* CONFIG_PCI */
7020 EXPORT_SYMBOL_GPL(ata_platform_remove_one);
7022 EXPORT_SYMBOL_GPL(__ata_ehi_push_desc);
7023 EXPORT_SYMBOL_GPL(ata_ehi_push_desc);
7024 EXPORT_SYMBOL_GPL(ata_ehi_clear_desc);
7025 EXPORT_SYMBOL_GPL(ata_port_desc);
7027 EXPORT_SYMBOL_GPL(ata_port_pbar_desc);
7028 #endif /* CONFIG_PCI */
7029 EXPORT_SYMBOL_GPL(ata_port_schedule_eh);
7030 EXPORT_SYMBOL_GPL(ata_link_abort);
7031 EXPORT_SYMBOL_GPL(ata_port_abort);
7032 EXPORT_SYMBOL_GPL(ata_port_freeze);
7033 EXPORT_SYMBOL_GPL(sata_async_notification);
7034 EXPORT_SYMBOL_GPL(ata_eh_freeze_port);
7035 EXPORT_SYMBOL_GPL(ata_eh_thaw_port);
7036 EXPORT_SYMBOL_GPL(ata_eh_qc_complete);
7037 EXPORT_SYMBOL_GPL(ata_eh_qc_retry);
7038 EXPORT_SYMBOL_GPL(ata_eh_analyze_ncq_error);
7039 EXPORT_SYMBOL_GPL(ata_do_eh);
7040 EXPORT_SYMBOL_GPL(ata_std_error_handler);
7042 EXPORT_SYMBOL_GPL(ata_cable_40wire);
7043 EXPORT_SYMBOL_GPL(ata_cable_80wire);
7044 EXPORT_SYMBOL_GPL(ata_cable_unknown);
7045 EXPORT_SYMBOL_GPL(ata_cable_ignore);
7046 EXPORT_SYMBOL_GPL(ata_cable_sata);