2 * libata-core.c - helper library for ATA
4 * Maintained by: Jeff Garzik <jgarzik@pobox.com>
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 <scsi/scsi.h>
60 #include <scsi/scsi_cmnd.h>
61 #include <scsi/scsi_host.h>
62 #include <linux/libata.h>
63 #include <asm/byteorder.h>
64 #include <linux/cdrom.h>
69 /* debounce timing parameters in msecs { interval, duration, timeout } */
70 const unsigned long sata_deb_timing_normal[] = { 5, 100, 2000 };
71 const unsigned long sata_deb_timing_hotplug[] = { 25, 500, 2000 };
72 const unsigned long sata_deb_timing_long[] = { 100, 2000, 5000 };
74 const struct ata_port_operations ata_base_port_ops = {
75 .prereset = ata_std_prereset,
76 .postreset = ata_std_postreset,
77 .error_handler = ata_std_error_handler,
80 const struct ata_port_operations sata_port_ops = {
81 .inherits = &ata_base_port_ops,
83 .qc_defer = ata_std_qc_defer,
84 .hardreset = sata_std_hardreset,
87 static unsigned int ata_dev_init_params(struct ata_device *dev,
88 u16 heads, u16 sectors);
89 static unsigned int ata_dev_set_xfermode(struct ata_device *dev);
90 static unsigned int ata_dev_set_feature(struct ata_device *dev,
91 u8 enable, u8 feature);
92 static void ata_dev_xfermask(struct ata_device *dev);
93 static unsigned long ata_dev_blacklisted(const struct ata_device *dev);
95 unsigned int ata_print_id = 1;
96 static struct workqueue_struct *ata_wq;
98 struct workqueue_struct *ata_aux_wq;
100 struct ata_force_param {
104 unsigned long xfer_mask;
105 unsigned int horkage_on;
106 unsigned int horkage_off;
110 struct ata_force_ent {
113 struct ata_force_param param;
116 static struct ata_force_ent *ata_force_tbl;
117 static int ata_force_tbl_size;
119 static char ata_force_param_buf[PAGE_SIZE] __initdata;
120 /* param_buf is thrown away after initialization, disallow read */
121 module_param_string(force, ata_force_param_buf, sizeof(ata_force_param_buf), 0);
122 MODULE_PARM_DESC(force, "Force ATA configurations including cable type, link speed and transfer mode (see Documentation/kernel-parameters.txt for details)");
124 static int atapi_enabled = 1;
125 module_param(atapi_enabled, int, 0444);
126 MODULE_PARM_DESC(atapi_enabled, "Enable discovery of ATAPI devices (0=off, 1=on)");
128 static int atapi_dmadir = 0;
129 module_param(atapi_dmadir, int, 0444);
130 MODULE_PARM_DESC(atapi_dmadir, "Enable ATAPI DMADIR bridge support (0=off, 1=on)");
132 int atapi_passthru16 = 1;
133 module_param(atapi_passthru16, int, 0444);
134 MODULE_PARM_DESC(atapi_passthru16, "Enable ATA_16 passthru for ATAPI devices; on by default (0=off, 1=on)");
137 module_param_named(fua, libata_fua, int, 0444);
138 MODULE_PARM_DESC(fua, "FUA support (0=off, 1=on)");
140 static int ata_ignore_hpa;
141 module_param_named(ignore_hpa, ata_ignore_hpa, int, 0644);
142 MODULE_PARM_DESC(ignore_hpa, "Ignore HPA limit (0=keep BIOS limits, 1=ignore limits, using full disk)");
144 static int libata_dma_mask = ATA_DMA_MASK_ATA|ATA_DMA_MASK_ATAPI|ATA_DMA_MASK_CFA;
145 module_param_named(dma, libata_dma_mask, int, 0444);
146 MODULE_PARM_DESC(dma, "DMA enable/disable (0x1==ATA, 0x2==ATAPI, 0x4==CF)");
148 static int ata_probe_timeout;
149 module_param(ata_probe_timeout, int, 0444);
150 MODULE_PARM_DESC(ata_probe_timeout, "Set ATA probing timeout (seconds)");
152 int libata_noacpi = 0;
153 module_param_named(noacpi, libata_noacpi, int, 0444);
154 MODULE_PARM_DESC(noacpi, "Disables the use of ACPI in probe/suspend/resume when set");
156 int libata_allow_tpm = 0;
157 module_param_named(allow_tpm, libata_allow_tpm, int, 0444);
158 MODULE_PARM_DESC(allow_tpm, "Permit the use of TPM commands");
160 MODULE_AUTHOR("Jeff Garzik");
161 MODULE_DESCRIPTION("Library module for ATA devices");
162 MODULE_LICENSE("GPL");
163 MODULE_VERSION(DRV_VERSION);
167 * Iterator helpers. Don't use directly.
170 * Host lock or EH context.
172 struct ata_link *__ata_port_next_link(struct ata_port *ap,
173 struct ata_link *link, bool dev_only)
175 /* NULL link indicates start of iteration */
177 if (dev_only && sata_pmp_attached(ap))
182 /* we just iterated over the host link, what's next? */
183 if (ata_is_host_link(link)) {
184 if (!sata_pmp_attached(ap))
189 /* iterate to the next PMP link */
190 if (++link < ap->pmp_link + ap->nr_pmp_links)
196 * ata_force_cbl - force cable type according to libata.force
197 * @ap: ATA port of interest
199 * Force cable type according to libata.force and whine about it.
200 * The last entry which has matching port number is used, so it
201 * can be specified as part of device force parameters. For
202 * example, both "a:40c,1.00:udma4" and "1.00:40c,udma4" have the
208 void ata_force_cbl(struct ata_port *ap)
212 for (i = ata_force_tbl_size - 1; i >= 0; i--) {
213 const struct ata_force_ent *fe = &ata_force_tbl[i];
215 if (fe->port != -1 && fe->port != ap->print_id)
218 if (fe->param.cbl == ATA_CBL_NONE)
221 ap->cbl = fe->param.cbl;
222 ata_port_printk(ap, KERN_NOTICE,
223 "FORCE: cable set to %s\n", fe->param.name);
229 * ata_force_link_limits - force link limits according to libata.force
230 * @link: ATA link of interest
232 * Force link flags and SATA spd limit according to libata.force
233 * and whine about it. When only the port part is specified
234 * (e.g. 1:), the limit applies to all links connected to both
235 * the host link and all fan-out ports connected via PMP. If the
236 * device part is specified as 0 (e.g. 1.00:), it specifies the
237 * first fan-out link not the host link. Device number 15 always
238 * points to the host link whether PMP is attached or not.
243 static void ata_force_link_limits(struct ata_link *link)
245 bool did_spd = false;
248 if (ata_is_host_link(link))
253 for (i = ata_force_tbl_size - 1; i >= 0; i--) {
254 const struct ata_force_ent *fe = &ata_force_tbl[i];
256 if (fe->port != -1 && fe->port != link->ap->print_id)
259 if (fe->device != -1 && fe->device != linkno)
262 /* only honor the first spd limit */
263 if (!did_spd && fe->param.spd_limit) {
264 link->hw_sata_spd_limit = (1 << fe->param.spd_limit) - 1;
265 ata_link_printk(link, KERN_NOTICE,
266 "FORCE: PHY spd limit set to %s\n",
271 /* let lflags stack */
272 if (fe->param.lflags) {
273 link->flags |= fe->param.lflags;
274 ata_link_printk(link, KERN_NOTICE,
275 "FORCE: link flag 0x%x forced -> 0x%x\n",
276 fe->param.lflags, link->flags);
282 * ata_force_xfermask - force xfermask according to libata.force
283 * @dev: ATA device of interest
285 * Force xfer_mask according to libata.force and whine about it.
286 * For consistency with link selection, device number 15 selects
287 * the first device connected to the host link.
292 static void ata_force_xfermask(struct ata_device *dev)
294 int devno = dev->link->pmp + dev->devno;
295 int alt_devno = devno;
298 /* allow n.15 for the first device attached to host port */
299 if (ata_is_host_link(dev->link) && devno == 0)
302 for (i = ata_force_tbl_size - 1; i >= 0; i--) {
303 const struct ata_force_ent *fe = &ata_force_tbl[i];
304 unsigned long pio_mask, mwdma_mask, udma_mask;
306 if (fe->port != -1 && fe->port != dev->link->ap->print_id)
309 if (fe->device != -1 && fe->device != devno &&
310 fe->device != alt_devno)
313 if (!fe->param.xfer_mask)
316 ata_unpack_xfermask(fe->param.xfer_mask,
317 &pio_mask, &mwdma_mask, &udma_mask);
319 dev->udma_mask = udma_mask;
320 else if (mwdma_mask) {
322 dev->mwdma_mask = mwdma_mask;
326 dev->pio_mask = pio_mask;
329 ata_dev_printk(dev, KERN_NOTICE,
330 "FORCE: xfer_mask set to %s\n", fe->param.name);
336 * ata_force_horkage - force horkage according to libata.force
337 * @dev: ATA device of interest
339 * Force horkage according to libata.force and whine about it.
340 * For consistency with link selection, device number 15 selects
341 * the first device connected to the host link.
346 static void ata_force_horkage(struct ata_device *dev)
348 int devno = dev->link->pmp + dev->devno;
349 int alt_devno = devno;
352 /* allow n.15 for the first device attached to host port */
353 if (ata_is_host_link(dev->link) && devno == 0)
356 for (i = 0; i < ata_force_tbl_size; i++) {
357 const struct ata_force_ent *fe = &ata_force_tbl[i];
359 if (fe->port != -1 && fe->port != dev->link->ap->print_id)
362 if (fe->device != -1 && fe->device != devno &&
363 fe->device != alt_devno)
366 if (!(~dev->horkage & fe->param.horkage_on) &&
367 !(dev->horkage & fe->param.horkage_off))
370 dev->horkage |= fe->param.horkage_on;
371 dev->horkage &= ~fe->param.horkage_off;
373 ata_dev_printk(dev, KERN_NOTICE,
374 "FORCE: horkage modified (%s)\n", fe->param.name);
379 * atapi_cmd_type - Determine ATAPI command type from SCSI opcode
380 * @opcode: SCSI opcode
382 * Determine ATAPI command type from @opcode.
388 * ATAPI_{READ|WRITE|READ_CD|PASS_THRU|MISC}
390 int atapi_cmd_type(u8 opcode)
399 case GPCMD_WRITE_AND_VERIFY_10:
403 case GPCMD_READ_CD_MSF:
404 return ATAPI_READ_CD;
408 if (atapi_passthru16)
409 return ATAPI_PASS_THRU;
417 * ata_tf_to_fis - Convert ATA taskfile to SATA FIS structure
418 * @tf: Taskfile to convert
419 * @pmp: Port multiplier port
420 * @is_cmd: This FIS is for command
421 * @fis: Buffer into which data will output
423 * Converts a standard ATA taskfile to a Serial ATA
424 * FIS structure (Register - Host to Device).
427 * Inherited from caller.
429 void ata_tf_to_fis(const struct ata_taskfile *tf, u8 pmp, int is_cmd, u8 *fis)
431 fis[0] = 0x27; /* Register - Host to Device FIS */
432 fis[1] = pmp & 0xf; /* Port multiplier number*/
434 fis[1] |= (1 << 7); /* bit 7 indicates Command FIS */
436 fis[2] = tf->command;
437 fis[3] = tf->feature;
444 fis[8] = tf->hob_lbal;
445 fis[9] = tf->hob_lbam;
446 fis[10] = tf->hob_lbah;
447 fis[11] = tf->hob_feature;
450 fis[13] = tf->hob_nsect;
461 * ata_tf_from_fis - Convert SATA FIS to ATA taskfile
462 * @fis: Buffer from which data will be input
463 * @tf: Taskfile to output
465 * Converts a serial ATA FIS structure to a standard ATA taskfile.
468 * Inherited from caller.
471 void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf)
473 tf->command = fis[2]; /* status */
474 tf->feature = fis[3]; /* error */
481 tf->hob_lbal = fis[8];
482 tf->hob_lbam = fis[9];
483 tf->hob_lbah = fis[10];
486 tf->hob_nsect = fis[13];
489 static const u8 ata_rw_cmds[] = {
493 ATA_CMD_READ_MULTI_EXT,
494 ATA_CMD_WRITE_MULTI_EXT,
498 ATA_CMD_WRITE_MULTI_FUA_EXT,
502 ATA_CMD_PIO_READ_EXT,
503 ATA_CMD_PIO_WRITE_EXT,
516 ATA_CMD_WRITE_FUA_EXT
520 * ata_rwcmd_protocol - set taskfile r/w commands and protocol
521 * @tf: command to examine and configure
522 * @dev: device tf belongs to
524 * Examine the device configuration and tf->flags to calculate
525 * the proper read/write commands and protocol to use.
530 static int ata_rwcmd_protocol(struct ata_taskfile *tf, struct ata_device *dev)
534 int index, fua, lba48, write;
536 fua = (tf->flags & ATA_TFLAG_FUA) ? 4 : 0;
537 lba48 = (tf->flags & ATA_TFLAG_LBA48) ? 2 : 0;
538 write = (tf->flags & ATA_TFLAG_WRITE) ? 1 : 0;
540 if (dev->flags & ATA_DFLAG_PIO) {
541 tf->protocol = ATA_PROT_PIO;
542 index = dev->multi_count ? 0 : 8;
543 } else if (lba48 && (dev->link->ap->flags & ATA_FLAG_PIO_LBA48)) {
544 /* Unable to use DMA due to host limitation */
545 tf->protocol = ATA_PROT_PIO;
546 index = dev->multi_count ? 0 : 8;
548 tf->protocol = ATA_PROT_DMA;
552 cmd = ata_rw_cmds[index + fua + lba48 + write];
561 * ata_tf_read_block - Read block address from ATA taskfile
562 * @tf: ATA taskfile of interest
563 * @dev: ATA device @tf belongs to
568 * Read block address from @tf. This function can handle all
569 * three address formats - LBA, LBA48 and CHS. tf->protocol and
570 * flags select the address format to use.
573 * Block address read from @tf.
575 u64 ata_tf_read_block(struct ata_taskfile *tf, struct ata_device *dev)
579 if (tf->flags & ATA_TFLAG_LBA) {
580 if (tf->flags & ATA_TFLAG_LBA48) {
581 block |= (u64)tf->hob_lbah << 40;
582 block |= (u64)tf->hob_lbam << 32;
583 block |= tf->hob_lbal << 24;
585 block |= (tf->device & 0xf) << 24;
587 block |= tf->lbah << 16;
588 block |= tf->lbam << 8;
593 cyl = tf->lbam | (tf->lbah << 8);
594 head = tf->device & 0xf;
597 block = (cyl * dev->heads + head) * dev->sectors + sect;
604 * ata_build_rw_tf - Build ATA taskfile for given read/write request
605 * @tf: Target ATA taskfile
606 * @dev: ATA device @tf belongs to
607 * @block: Block address
608 * @n_block: Number of blocks
609 * @tf_flags: RW/FUA etc...
615 * Build ATA taskfile @tf for read/write request described by
616 * @block, @n_block, @tf_flags and @tag on @dev.
620 * 0 on success, -ERANGE if the request is too large for @dev,
621 * -EINVAL if the request is invalid.
623 int ata_build_rw_tf(struct ata_taskfile *tf, struct ata_device *dev,
624 u64 block, u32 n_block, unsigned int tf_flags,
627 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
628 tf->flags |= tf_flags;
630 if (ata_ncq_enabled(dev) && likely(tag != ATA_TAG_INTERNAL)) {
632 if (!lba_48_ok(block, n_block))
635 tf->protocol = ATA_PROT_NCQ;
636 tf->flags |= ATA_TFLAG_LBA | ATA_TFLAG_LBA48;
638 if (tf->flags & ATA_TFLAG_WRITE)
639 tf->command = ATA_CMD_FPDMA_WRITE;
641 tf->command = ATA_CMD_FPDMA_READ;
643 tf->nsect = tag << 3;
644 tf->hob_feature = (n_block >> 8) & 0xff;
645 tf->feature = n_block & 0xff;
647 tf->hob_lbah = (block >> 40) & 0xff;
648 tf->hob_lbam = (block >> 32) & 0xff;
649 tf->hob_lbal = (block >> 24) & 0xff;
650 tf->lbah = (block >> 16) & 0xff;
651 tf->lbam = (block >> 8) & 0xff;
652 tf->lbal = block & 0xff;
655 if (tf->flags & ATA_TFLAG_FUA)
656 tf->device |= 1 << 7;
657 } else if (dev->flags & ATA_DFLAG_LBA) {
658 tf->flags |= ATA_TFLAG_LBA;
660 if (lba_28_ok(block, n_block)) {
662 tf->device |= (block >> 24) & 0xf;
663 } else if (lba_48_ok(block, n_block)) {
664 if (!(dev->flags & ATA_DFLAG_LBA48))
668 tf->flags |= ATA_TFLAG_LBA48;
670 tf->hob_nsect = (n_block >> 8) & 0xff;
672 tf->hob_lbah = (block >> 40) & 0xff;
673 tf->hob_lbam = (block >> 32) & 0xff;
674 tf->hob_lbal = (block >> 24) & 0xff;
676 /* request too large even for LBA48 */
679 if (unlikely(ata_rwcmd_protocol(tf, dev) < 0))
682 tf->nsect = n_block & 0xff;
684 tf->lbah = (block >> 16) & 0xff;
685 tf->lbam = (block >> 8) & 0xff;
686 tf->lbal = block & 0xff;
688 tf->device |= ATA_LBA;
691 u32 sect, head, cyl, track;
693 /* The request -may- be too large for CHS addressing. */
694 if (!lba_28_ok(block, n_block))
697 if (unlikely(ata_rwcmd_protocol(tf, dev) < 0))
700 /* Convert LBA to CHS */
701 track = (u32)block / dev->sectors;
702 cyl = track / dev->heads;
703 head = track % dev->heads;
704 sect = (u32)block % dev->sectors + 1;
706 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
707 (u32)block, track, cyl, head, sect);
709 /* Check whether the converted CHS can fit.
713 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
716 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
727 * ata_pack_xfermask - Pack pio, mwdma and udma masks into xfer_mask
728 * @pio_mask: pio_mask
729 * @mwdma_mask: mwdma_mask
730 * @udma_mask: udma_mask
732 * Pack @pio_mask, @mwdma_mask and @udma_mask into a single
733 * unsigned int xfer_mask.
741 unsigned long ata_pack_xfermask(unsigned long pio_mask,
742 unsigned long mwdma_mask,
743 unsigned long udma_mask)
745 return ((pio_mask << ATA_SHIFT_PIO) & ATA_MASK_PIO) |
746 ((mwdma_mask << ATA_SHIFT_MWDMA) & ATA_MASK_MWDMA) |
747 ((udma_mask << ATA_SHIFT_UDMA) & ATA_MASK_UDMA);
751 * ata_unpack_xfermask - Unpack xfer_mask into pio, mwdma and udma masks
752 * @xfer_mask: xfer_mask to unpack
753 * @pio_mask: resulting pio_mask
754 * @mwdma_mask: resulting mwdma_mask
755 * @udma_mask: resulting udma_mask
757 * Unpack @xfer_mask into @pio_mask, @mwdma_mask and @udma_mask.
758 * Any NULL distination masks will be ignored.
760 void ata_unpack_xfermask(unsigned long xfer_mask, unsigned long *pio_mask,
761 unsigned long *mwdma_mask, unsigned long *udma_mask)
764 *pio_mask = (xfer_mask & ATA_MASK_PIO) >> ATA_SHIFT_PIO;
766 *mwdma_mask = (xfer_mask & ATA_MASK_MWDMA) >> ATA_SHIFT_MWDMA;
768 *udma_mask = (xfer_mask & ATA_MASK_UDMA) >> ATA_SHIFT_UDMA;
771 static const struct ata_xfer_ent {
775 { ATA_SHIFT_PIO, ATA_NR_PIO_MODES, XFER_PIO_0 },
776 { ATA_SHIFT_MWDMA, ATA_NR_MWDMA_MODES, XFER_MW_DMA_0 },
777 { ATA_SHIFT_UDMA, ATA_NR_UDMA_MODES, XFER_UDMA_0 },
782 * ata_xfer_mask2mode - Find matching XFER_* for the given xfer_mask
783 * @xfer_mask: xfer_mask of interest
785 * Return matching XFER_* value for @xfer_mask. Only the highest
786 * bit of @xfer_mask is considered.
792 * Matching XFER_* value, 0xff if no match found.
794 u8 ata_xfer_mask2mode(unsigned long xfer_mask)
796 int highbit = fls(xfer_mask) - 1;
797 const struct ata_xfer_ent *ent;
799 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
800 if (highbit >= ent->shift && highbit < ent->shift + ent->bits)
801 return ent->base + highbit - ent->shift;
806 * ata_xfer_mode2mask - Find matching xfer_mask for XFER_*
807 * @xfer_mode: XFER_* of interest
809 * Return matching xfer_mask for @xfer_mode.
815 * Matching xfer_mask, 0 if no match found.
817 unsigned long ata_xfer_mode2mask(u8 xfer_mode)
819 const struct ata_xfer_ent *ent;
821 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
822 if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits)
823 return ((2 << (ent->shift + xfer_mode - ent->base)) - 1)
824 & ~((1 << ent->shift) - 1);
829 * ata_xfer_mode2shift - Find matching xfer_shift for XFER_*
830 * @xfer_mode: XFER_* of interest
832 * Return matching xfer_shift for @xfer_mode.
838 * Matching xfer_shift, -1 if no match found.
840 int ata_xfer_mode2shift(unsigned long xfer_mode)
842 const struct ata_xfer_ent *ent;
844 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
845 if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits)
851 * ata_mode_string - convert xfer_mask to string
852 * @xfer_mask: mask of bits supported; only highest bit counts.
854 * Determine string which represents the highest speed
855 * (highest bit in @modemask).
861 * Constant C string representing highest speed listed in
862 * @mode_mask, or the constant C string "<n/a>".
864 const char *ata_mode_string(unsigned long xfer_mask)
866 static const char * const xfer_mode_str[] = {
890 highbit = fls(xfer_mask) - 1;
891 if (highbit >= 0 && highbit < ARRAY_SIZE(xfer_mode_str))
892 return xfer_mode_str[highbit];
896 static const char *sata_spd_string(unsigned int spd)
898 static const char * const spd_str[] = {
903 if (spd == 0 || (spd - 1) >= ARRAY_SIZE(spd_str))
905 return spd_str[spd - 1];
908 void ata_dev_disable(struct ata_device *dev)
910 if (ata_dev_enabled(dev)) {
911 if (ata_msg_drv(dev->link->ap))
912 ata_dev_printk(dev, KERN_WARNING, "disabled\n");
913 ata_acpi_on_disable(dev);
914 ata_down_xfermask_limit(dev, ATA_DNXFER_FORCE_PIO0 |
920 static int ata_dev_set_dipm(struct ata_device *dev, enum link_pm policy)
922 struct ata_link *link = dev->link;
923 struct ata_port *ap = link->ap;
925 unsigned int err_mask;
929 * disallow DIPM for drivers which haven't set
930 * ATA_FLAG_IPM. This is because when DIPM is enabled,
931 * phy ready will be set in the interrupt status on
932 * state changes, which will cause some drivers to
933 * think there are errors - additionally drivers will
934 * need to disable hot plug.
936 if (!(ap->flags & ATA_FLAG_IPM) || !ata_dev_enabled(dev)) {
937 ap->pm_policy = NOT_AVAILABLE;
942 * For DIPM, we will only enable it for the
945 * Why? Because Disks are too stupid to know that
946 * If the host rejects a request to go to SLUMBER
947 * they should retry at PARTIAL, and instead it
948 * just would give up. So, for medium_power to
949 * work at all, we need to only allow HIPM.
951 rc = sata_scr_read(link, SCR_CONTROL, &scontrol);
957 /* no restrictions on IPM transitions */
958 scontrol &= ~(0x3 << 8);
959 rc = sata_scr_write(link, SCR_CONTROL, scontrol);
964 if (dev->flags & ATA_DFLAG_DIPM)
965 err_mask = ata_dev_set_feature(dev,
966 SETFEATURES_SATA_ENABLE, SATA_DIPM);
969 /* allow IPM to PARTIAL */
970 scontrol &= ~(0x1 << 8);
971 scontrol |= (0x2 << 8);
972 rc = sata_scr_write(link, SCR_CONTROL, scontrol);
977 * we don't have to disable DIPM since IPM flags
978 * disallow transitions to SLUMBER, which effectively
979 * disable DIPM if it does not support PARTIAL
983 case MAX_PERFORMANCE:
984 /* disable all IPM transitions */
985 scontrol |= (0x3 << 8);
986 rc = sata_scr_write(link, SCR_CONTROL, scontrol);
991 * we don't have to disable DIPM since IPM flags
992 * disallow all transitions which effectively
993 * disable DIPM anyway.
998 /* FIXME: handle SET FEATURES failure */
1005 * ata_dev_enable_pm - enable SATA interface power management
1006 * @dev: device to enable power management
1007 * @policy: the link power management policy
1009 * Enable SATA Interface power management. This will enable
1010 * Device Interface Power Management (DIPM) for min_power
1011 * policy, and then call driver specific callbacks for
1012 * enabling Host Initiated Power management.
1015 * Returns: -EINVAL if IPM is not supported, 0 otherwise.
1017 void ata_dev_enable_pm(struct ata_device *dev, enum link_pm policy)
1020 struct ata_port *ap = dev->link->ap;
1022 /* set HIPM first, then DIPM */
1023 if (ap->ops->enable_pm)
1024 rc = ap->ops->enable_pm(ap, policy);
1027 rc = ata_dev_set_dipm(dev, policy);
1031 ap->pm_policy = MAX_PERFORMANCE;
1033 ap->pm_policy = policy;
1034 return /* rc */; /* hopefully we can use 'rc' eventually */
1039 * ata_dev_disable_pm - disable SATA interface power management
1040 * @dev: device to disable power management
1042 * Disable SATA Interface power management. This will disable
1043 * Device Interface Power Management (DIPM) without changing
1044 * policy, call driver specific callbacks for disabling Host
1045 * Initiated Power management.
1050 static void ata_dev_disable_pm(struct ata_device *dev)
1052 struct ata_port *ap = dev->link->ap;
1054 ata_dev_set_dipm(dev, MAX_PERFORMANCE);
1055 if (ap->ops->disable_pm)
1056 ap->ops->disable_pm(ap);
1058 #endif /* CONFIG_PM */
1060 void ata_lpm_schedule(struct ata_port *ap, enum link_pm policy)
1062 ap->pm_policy = policy;
1063 ap->link.eh_info.action |= ATA_EH_LPM;
1064 ap->link.eh_info.flags |= ATA_EHI_NO_AUTOPSY;
1065 ata_port_schedule_eh(ap);
1069 static void ata_lpm_enable(struct ata_host *host)
1071 struct ata_link *link;
1072 struct ata_port *ap;
1073 struct ata_device *dev;
1076 for (i = 0; i < host->n_ports; i++) {
1077 ap = host->ports[i];
1078 ata_port_for_each_link(link, ap) {
1079 ata_link_for_each_dev(dev, link)
1080 ata_dev_disable_pm(dev);
1085 static void ata_lpm_disable(struct ata_host *host)
1089 for (i = 0; i < host->n_ports; i++) {
1090 struct ata_port *ap = host->ports[i];
1091 ata_lpm_schedule(ap, ap->pm_policy);
1094 #endif /* CONFIG_PM */
1097 * ata_dev_classify - determine device type based on ATA-spec signature
1098 * @tf: ATA taskfile register set for device to be identified
1100 * Determine from taskfile register contents whether a device is
1101 * ATA or ATAPI, as per "Signature and persistence" section
1102 * of ATA/PI spec (volume 1, sect 5.14).
1108 * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, %ATA_DEV_PMP or
1109 * %ATA_DEV_UNKNOWN the event of failure.
1111 unsigned int ata_dev_classify(const struct ata_taskfile *tf)
1113 /* Apple's open source Darwin code hints that some devices only
1114 * put a proper signature into the LBA mid/high registers,
1115 * So, we only check those. It's sufficient for uniqueness.
1117 * ATA/ATAPI-7 (d1532v1r1: Feb. 19, 2003) specified separate
1118 * signatures for ATA and ATAPI devices attached on SerialATA,
1119 * 0x3c/0xc3 and 0x69/0x96 respectively. However, SerialATA
1120 * spec has never mentioned about using different signatures
1121 * for ATA/ATAPI devices. Then, Serial ATA II: Port
1122 * Multiplier specification began to use 0x69/0x96 to identify
1123 * port multpliers and 0x3c/0xc3 to identify SEMB device.
1124 * ATA/ATAPI-7 dropped descriptions about 0x3c/0xc3 and
1125 * 0x69/0x96 shortly and described them as reserved for
1128 * We follow the current spec and consider that 0x69/0x96
1129 * identifies a port multiplier and 0x3c/0xc3 a SEMB device.
1131 if ((tf->lbam == 0) && (tf->lbah == 0)) {
1132 DPRINTK("found ATA device by sig\n");
1136 if ((tf->lbam == 0x14) && (tf->lbah == 0xeb)) {
1137 DPRINTK("found ATAPI device by sig\n");
1138 return ATA_DEV_ATAPI;
1141 if ((tf->lbam == 0x69) && (tf->lbah == 0x96)) {
1142 DPRINTK("found PMP device by sig\n");
1146 if ((tf->lbam == 0x3c) && (tf->lbah == 0xc3)) {
1147 printk(KERN_INFO "ata: SEMB device ignored\n");
1148 return ATA_DEV_SEMB_UNSUP; /* not yet */
1151 DPRINTK("unknown device\n");
1152 return ATA_DEV_UNKNOWN;
1156 * ata_id_string - Convert IDENTIFY DEVICE page into string
1157 * @id: IDENTIFY DEVICE results we will examine
1158 * @s: string into which data is output
1159 * @ofs: offset into identify device page
1160 * @len: length of string to return. must be an even number.
1162 * The strings in the IDENTIFY DEVICE page are broken up into
1163 * 16-bit chunks. Run through the string, and output each
1164 * 8-bit chunk linearly, regardless of platform.
1170 void ata_id_string(const u16 *id, unsigned char *s,
1171 unsigned int ofs, unsigned int len)
1192 * ata_id_c_string - Convert IDENTIFY DEVICE page into C string
1193 * @id: IDENTIFY DEVICE results we will examine
1194 * @s: string into which data is output
1195 * @ofs: offset into identify device page
1196 * @len: length of string to return. must be an odd number.
1198 * This function is identical to ata_id_string except that it
1199 * trims trailing spaces and terminates the resulting string with
1200 * null. @len must be actual maximum length (even number) + 1.
1205 void ata_id_c_string(const u16 *id, unsigned char *s,
1206 unsigned int ofs, unsigned int len)
1210 ata_id_string(id, s, ofs, len - 1);
1212 p = s + strnlen(s, len - 1);
1213 while (p > s && p[-1] == ' ')
1218 static u64 ata_id_n_sectors(const u16 *id)
1220 if (ata_id_has_lba(id)) {
1221 if (ata_id_has_lba48(id))
1222 return ata_id_u64(id, 100);
1224 return ata_id_u32(id, 60);
1226 if (ata_id_current_chs_valid(id))
1227 return ata_id_u32(id, 57);
1229 return id[1] * id[3] * id[6];
1233 u64 ata_tf_to_lba48(const struct ata_taskfile *tf)
1237 sectors |= ((u64)(tf->hob_lbah & 0xff)) << 40;
1238 sectors |= ((u64)(tf->hob_lbam & 0xff)) << 32;
1239 sectors |= (tf->hob_lbal & 0xff) << 24;
1240 sectors |= (tf->lbah & 0xff) << 16;
1241 sectors |= (tf->lbam & 0xff) << 8;
1242 sectors |= (tf->lbal & 0xff);
1247 u64 ata_tf_to_lba(const struct ata_taskfile *tf)
1251 sectors |= (tf->device & 0x0f) << 24;
1252 sectors |= (tf->lbah & 0xff) << 16;
1253 sectors |= (tf->lbam & 0xff) << 8;
1254 sectors |= (tf->lbal & 0xff);
1260 * ata_read_native_max_address - Read native max address
1261 * @dev: target device
1262 * @max_sectors: out parameter for the result native max address
1264 * Perform an LBA48 or LBA28 native size query upon the device in
1268 * 0 on success, -EACCES if command is aborted by the drive.
1269 * -EIO on other errors.
1271 static int ata_read_native_max_address(struct ata_device *dev, u64 *max_sectors)
1273 unsigned int err_mask;
1274 struct ata_taskfile tf;
1275 int lba48 = ata_id_has_lba48(dev->id);
1277 ata_tf_init(dev, &tf);
1279 /* always clear all address registers */
1280 tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
1283 tf.command = ATA_CMD_READ_NATIVE_MAX_EXT;
1284 tf.flags |= ATA_TFLAG_LBA48;
1286 tf.command = ATA_CMD_READ_NATIVE_MAX;
1288 tf.protocol |= ATA_PROT_NODATA;
1289 tf.device |= ATA_LBA;
1291 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
1293 ata_dev_printk(dev, KERN_WARNING, "failed to read native "
1294 "max address (err_mask=0x%x)\n", err_mask);
1295 if (err_mask == AC_ERR_DEV && (tf.feature & ATA_ABORTED))
1301 *max_sectors = ata_tf_to_lba48(&tf) + 1;
1303 *max_sectors = ata_tf_to_lba(&tf) + 1;
1304 if (dev->horkage & ATA_HORKAGE_HPA_SIZE)
1310 * ata_set_max_sectors - Set max sectors
1311 * @dev: target device
1312 * @new_sectors: new max sectors value to set for the device
1314 * Set max sectors of @dev to @new_sectors.
1317 * 0 on success, -EACCES if command is aborted or denied (due to
1318 * previous non-volatile SET_MAX) by the drive. -EIO on other
1321 static int ata_set_max_sectors(struct ata_device *dev, u64 new_sectors)
1323 unsigned int err_mask;
1324 struct ata_taskfile tf;
1325 int lba48 = ata_id_has_lba48(dev->id);
1329 ata_tf_init(dev, &tf);
1331 tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
1334 tf.command = ATA_CMD_SET_MAX_EXT;
1335 tf.flags |= ATA_TFLAG_LBA48;
1337 tf.hob_lbal = (new_sectors >> 24) & 0xff;
1338 tf.hob_lbam = (new_sectors >> 32) & 0xff;
1339 tf.hob_lbah = (new_sectors >> 40) & 0xff;
1341 tf.command = ATA_CMD_SET_MAX;
1343 tf.device |= (new_sectors >> 24) & 0xf;
1346 tf.protocol |= ATA_PROT_NODATA;
1347 tf.device |= ATA_LBA;
1349 tf.lbal = (new_sectors >> 0) & 0xff;
1350 tf.lbam = (new_sectors >> 8) & 0xff;
1351 tf.lbah = (new_sectors >> 16) & 0xff;
1353 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
1355 ata_dev_printk(dev, KERN_WARNING, "failed to set "
1356 "max address (err_mask=0x%x)\n", err_mask);
1357 if (err_mask == AC_ERR_DEV &&
1358 (tf.feature & (ATA_ABORTED | ATA_IDNF)))
1367 * ata_hpa_resize - Resize a device with an HPA set
1368 * @dev: Device to resize
1370 * Read the size of an LBA28 or LBA48 disk with HPA features and resize
1371 * it if required to the full size of the media. The caller must check
1372 * the drive has the HPA feature set enabled.
1375 * 0 on success, -errno on failure.
1377 static int ata_hpa_resize(struct ata_device *dev)
1379 struct ata_eh_context *ehc = &dev->link->eh_context;
1380 int print_info = ehc->i.flags & ATA_EHI_PRINTINFO;
1381 u64 sectors = ata_id_n_sectors(dev->id);
1385 /* do we need to do it? */
1386 if (dev->class != ATA_DEV_ATA ||
1387 !ata_id_has_lba(dev->id) || !ata_id_hpa_enabled(dev->id) ||
1388 (dev->horkage & ATA_HORKAGE_BROKEN_HPA))
1391 /* read native max address */
1392 rc = ata_read_native_max_address(dev, &native_sectors);
1394 /* If device aborted the command or HPA isn't going to
1395 * be unlocked, skip HPA resizing.
1397 if (rc == -EACCES || !ata_ignore_hpa) {
1398 ata_dev_printk(dev, KERN_WARNING, "HPA support seems "
1399 "broken, skipping HPA handling\n");
1400 dev->horkage |= ATA_HORKAGE_BROKEN_HPA;
1402 /* we can continue if device aborted the command */
1410 /* nothing to do? */
1411 if (native_sectors <= sectors || !ata_ignore_hpa) {
1412 if (!print_info || native_sectors == sectors)
1415 if (native_sectors > sectors)
1416 ata_dev_printk(dev, KERN_INFO,
1417 "HPA detected: current %llu, native %llu\n",
1418 (unsigned long long)sectors,
1419 (unsigned long long)native_sectors);
1420 else if (native_sectors < sectors)
1421 ata_dev_printk(dev, KERN_WARNING,
1422 "native sectors (%llu) is smaller than "
1424 (unsigned long long)native_sectors,
1425 (unsigned long long)sectors);
1429 /* let's unlock HPA */
1430 rc = ata_set_max_sectors(dev, native_sectors);
1431 if (rc == -EACCES) {
1432 /* if device aborted the command, skip HPA resizing */
1433 ata_dev_printk(dev, KERN_WARNING, "device aborted resize "
1434 "(%llu -> %llu), skipping HPA handling\n",
1435 (unsigned long long)sectors,
1436 (unsigned long long)native_sectors);
1437 dev->horkage |= ATA_HORKAGE_BROKEN_HPA;
1442 /* re-read IDENTIFY data */
1443 rc = ata_dev_reread_id(dev, 0);
1445 ata_dev_printk(dev, KERN_ERR, "failed to re-read IDENTIFY "
1446 "data after HPA resizing\n");
1451 u64 new_sectors = ata_id_n_sectors(dev->id);
1452 ata_dev_printk(dev, KERN_INFO,
1453 "HPA unlocked: %llu -> %llu, native %llu\n",
1454 (unsigned long long)sectors,
1455 (unsigned long long)new_sectors,
1456 (unsigned long long)native_sectors);
1463 * ata_dump_id - IDENTIFY DEVICE info debugging output
1464 * @id: IDENTIFY DEVICE page to dump
1466 * Dump selected 16-bit words from the given IDENTIFY DEVICE
1473 static inline void ata_dump_id(const u16 *id)
1475 DPRINTK("49==0x%04x "
1485 DPRINTK("80==0x%04x "
1495 DPRINTK("88==0x%04x "
1502 * ata_id_xfermask - Compute xfermask from the given IDENTIFY data
1503 * @id: IDENTIFY data to compute xfer mask from
1505 * Compute the xfermask for this device. This is not as trivial
1506 * as it seems if we must consider early devices correctly.
1508 * FIXME: pre IDE drive timing (do we care ?).
1516 unsigned long ata_id_xfermask(const u16 *id)
1518 unsigned long pio_mask, mwdma_mask, udma_mask;
1520 /* Usual case. Word 53 indicates word 64 is valid */
1521 if (id[ATA_ID_FIELD_VALID] & (1 << 1)) {
1522 pio_mask = id[ATA_ID_PIO_MODES] & 0x03;
1526 /* If word 64 isn't valid then Word 51 high byte holds
1527 * the PIO timing number for the maximum. Turn it into
1530 u8 mode = (id[ATA_ID_OLD_PIO_MODES] >> 8) & 0xFF;
1531 if (mode < 5) /* Valid PIO range */
1532 pio_mask = (2 << mode) - 1;
1536 /* But wait.. there's more. Design your standards by
1537 * committee and you too can get a free iordy field to
1538 * process. However its the speeds not the modes that
1539 * are supported... Note drivers using the timing API
1540 * will get this right anyway
1544 mwdma_mask = id[ATA_ID_MWDMA_MODES] & 0x07;
1546 if (ata_id_is_cfa(id)) {
1548 * Process compact flash extended modes
1550 int pio = id[163] & 0x7;
1551 int dma = (id[163] >> 3) & 7;
1554 pio_mask |= (1 << 5);
1556 pio_mask |= (1 << 6);
1558 mwdma_mask |= (1 << 3);
1560 mwdma_mask |= (1 << 4);
1564 if (id[ATA_ID_FIELD_VALID] & (1 << 2))
1565 udma_mask = id[ATA_ID_UDMA_MODES] & 0xff;
1567 return ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask);
1571 * ata_pio_queue_task - Queue port_task
1572 * @ap: The ata_port to queue port_task for
1573 * @fn: workqueue function to be scheduled
1574 * @data: data for @fn to use
1575 * @delay: delay time in msecs for workqueue function
1577 * Schedule @fn(@data) for execution after @delay jiffies using
1578 * port_task. There is one port_task per port and it's the
1579 * user(low level driver)'s responsibility to make sure that only
1580 * one task is active at any given time.
1582 * libata core layer takes care of synchronization between
1583 * port_task and EH. ata_pio_queue_task() may be ignored for EH
1587 * Inherited from caller.
1589 void ata_pio_queue_task(struct ata_port *ap, void *data, unsigned long delay)
1591 ap->port_task_data = data;
1593 /* may fail if ata_port_flush_task() in progress */
1594 queue_delayed_work(ata_wq, &ap->port_task, msecs_to_jiffies(delay));
1598 * ata_port_flush_task - Flush port_task
1599 * @ap: The ata_port to flush port_task for
1601 * After this function completes, port_task is guranteed not to
1602 * be running or scheduled.
1605 * Kernel thread context (may sleep)
1607 void ata_port_flush_task(struct ata_port *ap)
1611 cancel_rearming_delayed_work(&ap->port_task);
1613 if (ata_msg_ctl(ap))
1614 ata_port_printk(ap, KERN_DEBUG, "%s: EXIT\n", __func__);
1617 static void ata_qc_complete_internal(struct ata_queued_cmd *qc)
1619 struct completion *waiting = qc->private_data;
1625 * ata_exec_internal_sg - execute libata internal command
1626 * @dev: Device to which the command is sent
1627 * @tf: Taskfile registers for the command and the result
1628 * @cdb: CDB for packet command
1629 * @dma_dir: Data tranfer direction of the command
1630 * @sgl: sg list for the data buffer of the command
1631 * @n_elem: Number of sg entries
1632 * @timeout: Timeout in msecs (0 for default)
1634 * Executes libata internal command with timeout. @tf contains
1635 * command on entry and result on return. Timeout and error
1636 * conditions are reported via return value. No recovery action
1637 * is taken after a command times out. It's caller's duty to
1638 * clean up after timeout.
1641 * None. Should be called with kernel context, might sleep.
1644 * Zero on success, AC_ERR_* mask on failure
1646 unsigned ata_exec_internal_sg(struct ata_device *dev,
1647 struct ata_taskfile *tf, const u8 *cdb,
1648 int dma_dir, struct scatterlist *sgl,
1649 unsigned int n_elem, unsigned long timeout)
1651 struct ata_link *link = dev->link;
1652 struct ata_port *ap = link->ap;
1653 u8 command = tf->command;
1654 int auto_timeout = 0;
1655 struct ata_queued_cmd *qc;
1656 unsigned int tag, preempted_tag;
1657 u32 preempted_sactive, preempted_qc_active;
1658 int preempted_nr_active_links;
1659 DECLARE_COMPLETION_ONSTACK(wait);
1660 unsigned long flags;
1661 unsigned int err_mask;
1664 spin_lock_irqsave(ap->lock, flags);
1666 /* no internal command while frozen */
1667 if (ap->pflags & ATA_PFLAG_FROZEN) {
1668 spin_unlock_irqrestore(ap->lock, flags);
1669 return AC_ERR_SYSTEM;
1672 /* initialize internal qc */
1674 /* XXX: Tag 0 is used for drivers with legacy EH as some
1675 * drivers choke if any other tag is given. This breaks
1676 * ata_tag_internal() test for those drivers. Don't use new
1677 * EH stuff without converting to it.
1679 if (ap->ops->error_handler)
1680 tag = ATA_TAG_INTERNAL;
1684 if (test_and_set_bit(tag, &ap->qc_allocated))
1686 qc = __ata_qc_from_tag(ap, tag);
1694 preempted_tag = link->active_tag;
1695 preempted_sactive = link->sactive;
1696 preempted_qc_active = ap->qc_active;
1697 preempted_nr_active_links = ap->nr_active_links;
1698 link->active_tag = ATA_TAG_POISON;
1701 ap->nr_active_links = 0;
1703 /* prepare & issue qc */
1706 memcpy(qc->cdb, cdb, ATAPI_CDB_LEN);
1707 qc->flags |= ATA_QCFLAG_RESULT_TF;
1708 qc->dma_dir = dma_dir;
1709 if (dma_dir != DMA_NONE) {
1710 unsigned int i, buflen = 0;
1711 struct scatterlist *sg;
1713 for_each_sg(sgl, sg, n_elem, i)
1714 buflen += sg->length;
1716 ata_sg_init(qc, sgl, n_elem);
1717 qc->nbytes = buflen;
1720 qc->private_data = &wait;
1721 qc->complete_fn = ata_qc_complete_internal;
1725 spin_unlock_irqrestore(ap->lock, flags);
1728 if (ata_probe_timeout)
1729 timeout = ata_probe_timeout * 1000;
1731 timeout = ata_internal_cmd_timeout(dev, command);
1736 rc = wait_for_completion_timeout(&wait, msecs_to_jiffies(timeout));
1738 ata_port_flush_task(ap);
1741 spin_lock_irqsave(ap->lock, flags);
1743 /* We're racing with irq here. If we lose, the
1744 * following test prevents us from completing the qc
1745 * twice. If we win, the port is frozen and will be
1746 * cleaned up by ->post_internal_cmd().
1748 if (qc->flags & ATA_QCFLAG_ACTIVE) {
1749 qc->err_mask |= AC_ERR_TIMEOUT;
1751 if (ap->ops->error_handler)
1752 ata_port_freeze(ap);
1754 ata_qc_complete(qc);
1756 if (ata_msg_warn(ap))
1757 ata_dev_printk(dev, KERN_WARNING,
1758 "qc timeout (cmd 0x%x)\n", command);
1761 spin_unlock_irqrestore(ap->lock, flags);
1764 /* do post_internal_cmd */
1765 if (ap->ops->post_internal_cmd)
1766 ap->ops->post_internal_cmd(qc);
1768 /* perform minimal error analysis */
1769 if (qc->flags & ATA_QCFLAG_FAILED) {
1770 if (qc->result_tf.command & (ATA_ERR | ATA_DF))
1771 qc->err_mask |= AC_ERR_DEV;
1774 qc->err_mask |= AC_ERR_OTHER;
1776 if (qc->err_mask & ~AC_ERR_OTHER)
1777 qc->err_mask &= ~AC_ERR_OTHER;
1781 spin_lock_irqsave(ap->lock, flags);
1783 *tf = qc->result_tf;
1784 err_mask = qc->err_mask;
1787 link->active_tag = preempted_tag;
1788 link->sactive = preempted_sactive;
1789 ap->qc_active = preempted_qc_active;
1790 ap->nr_active_links = preempted_nr_active_links;
1792 /* XXX - Some LLDDs (sata_mv) disable port on command failure.
1793 * Until those drivers are fixed, we detect the condition
1794 * here, fail the command with AC_ERR_SYSTEM and reenable the
1797 * Note that this doesn't change any behavior as internal
1798 * command failure results in disabling the device in the
1799 * higher layer for LLDDs without new reset/EH callbacks.
1801 * Kill the following code as soon as those drivers are fixed.
1803 if (ap->flags & ATA_FLAG_DISABLED) {
1804 err_mask |= AC_ERR_SYSTEM;
1808 spin_unlock_irqrestore(ap->lock, flags);
1810 if ((err_mask & AC_ERR_TIMEOUT) && auto_timeout)
1811 ata_internal_cmd_timed_out(dev, command);
1817 * ata_exec_internal - execute libata internal command
1818 * @dev: Device to which the command is sent
1819 * @tf: Taskfile registers for the command and the result
1820 * @cdb: CDB for packet command
1821 * @dma_dir: Data tranfer direction of the command
1822 * @buf: Data buffer of the command
1823 * @buflen: Length of data buffer
1824 * @timeout: Timeout in msecs (0 for default)
1826 * Wrapper around ata_exec_internal_sg() which takes simple
1827 * buffer instead of sg list.
1830 * None. Should be called with kernel context, might sleep.
1833 * Zero on success, AC_ERR_* mask on failure
1835 unsigned ata_exec_internal(struct ata_device *dev,
1836 struct ata_taskfile *tf, const u8 *cdb,
1837 int dma_dir, void *buf, unsigned int buflen,
1838 unsigned long timeout)
1840 struct scatterlist *psg = NULL, sg;
1841 unsigned int n_elem = 0;
1843 if (dma_dir != DMA_NONE) {
1845 sg_init_one(&sg, buf, buflen);
1850 return ata_exec_internal_sg(dev, tf, cdb, dma_dir, psg, n_elem,
1855 * ata_do_simple_cmd - execute simple internal command
1856 * @dev: Device to which the command is sent
1857 * @cmd: Opcode to execute
1859 * Execute a 'simple' command, that only consists of the opcode
1860 * 'cmd' itself, without filling any other registers
1863 * Kernel thread context (may sleep).
1866 * Zero on success, AC_ERR_* mask on failure
1868 unsigned int ata_do_simple_cmd(struct ata_device *dev, u8 cmd)
1870 struct ata_taskfile tf;
1872 ata_tf_init(dev, &tf);
1875 tf.flags |= ATA_TFLAG_DEVICE;
1876 tf.protocol = ATA_PROT_NODATA;
1878 return ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
1882 * ata_pio_need_iordy - check if iordy needed
1885 * Check if the current speed of the device requires IORDY. Used
1886 * by various controllers for chip configuration.
1889 unsigned int ata_pio_need_iordy(const struct ata_device *adev)
1891 /* Controller doesn't support IORDY. Probably a pointless check
1892 as the caller should know this */
1893 if (adev->link->ap->flags & ATA_FLAG_NO_IORDY)
1895 /* PIO3 and higher it is mandatory */
1896 if (adev->pio_mode > XFER_PIO_2)
1898 /* We turn it on when possible */
1899 if (ata_id_has_iordy(adev->id))
1905 * ata_pio_mask_no_iordy - Return the non IORDY mask
1908 * Compute the highest mode possible if we are not using iordy. Return
1909 * -1 if no iordy mode is available.
1912 static u32 ata_pio_mask_no_iordy(const struct ata_device *adev)
1914 /* If we have no drive specific rule, then PIO 2 is non IORDY */
1915 if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE */
1916 u16 pio = adev->id[ATA_ID_EIDE_PIO];
1917 /* Is the speed faster than the drive allows non IORDY ? */
1919 /* This is cycle times not frequency - watch the logic! */
1920 if (pio > 240) /* PIO2 is 240nS per cycle */
1921 return 3 << ATA_SHIFT_PIO;
1922 return 7 << ATA_SHIFT_PIO;
1925 return 3 << ATA_SHIFT_PIO;
1929 * ata_do_dev_read_id - default ID read method
1931 * @tf: proposed taskfile
1934 * Issue the identify taskfile and hand back the buffer containing
1935 * identify data. For some RAID controllers and for pre ATA devices
1936 * this function is wrapped or replaced by the driver
1938 unsigned int ata_do_dev_read_id(struct ata_device *dev,
1939 struct ata_taskfile *tf, u16 *id)
1941 return ata_exec_internal(dev, tf, NULL, DMA_FROM_DEVICE,
1942 id, sizeof(id[0]) * ATA_ID_WORDS, 0);
1946 * ata_dev_read_id - Read ID data from the specified device
1947 * @dev: target device
1948 * @p_class: pointer to class of the target device (may be changed)
1949 * @flags: ATA_READID_* flags
1950 * @id: buffer to read IDENTIFY data into
1952 * Read ID data from the specified device. ATA_CMD_ID_ATA is
1953 * performed on ATA devices and ATA_CMD_ID_ATAPI on ATAPI
1954 * devices. This function also issues ATA_CMD_INIT_DEV_PARAMS
1955 * for pre-ATA4 drives.
1957 * FIXME: ATA_CMD_ID_ATA is optional for early drives and right
1958 * now we abort if we hit that case.
1961 * Kernel thread context (may sleep)
1964 * 0 on success, -errno otherwise.
1966 int ata_dev_read_id(struct ata_device *dev, unsigned int *p_class,
1967 unsigned int flags, u16 *id)
1969 struct ata_port *ap = dev->link->ap;
1970 unsigned int class = *p_class;
1971 struct ata_taskfile tf;
1972 unsigned int err_mask = 0;
1974 int may_fallback = 1, tried_spinup = 0;
1977 if (ata_msg_ctl(ap))
1978 ata_dev_printk(dev, KERN_DEBUG, "%s: ENTER\n", __func__);
1981 ata_tf_init(dev, &tf);
1985 tf.command = ATA_CMD_ID_ATA;
1988 tf.command = ATA_CMD_ID_ATAPI;
1992 reason = "unsupported class";
1996 tf.protocol = ATA_PROT_PIO;
1998 /* Some devices choke if TF registers contain garbage. Make
1999 * sure those are properly initialized.
2001 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2003 /* Device presence detection is unreliable on some
2004 * controllers. Always poll IDENTIFY if available.
2006 tf.flags |= ATA_TFLAG_POLLING;
2008 if (ap->ops->read_id)
2009 err_mask = ap->ops->read_id(dev, &tf, id);
2011 err_mask = ata_do_dev_read_id(dev, &tf, id);
2014 if (err_mask & AC_ERR_NODEV_HINT) {
2015 ata_dev_printk(dev, KERN_DEBUG,
2016 "NODEV after polling detection\n");
2020 if ((err_mask == AC_ERR_DEV) && (tf.feature & ATA_ABORTED)) {
2021 /* Device or controller might have reported
2022 * the wrong device class. Give a shot at the
2023 * other IDENTIFY if the current one is
2024 * aborted by the device.
2029 if (class == ATA_DEV_ATA)
2030 class = ATA_DEV_ATAPI;
2032 class = ATA_DEV_ATA;
2036 /* Control reaches here iff the device aborted
2037 * both flavors of IDENTIFYs which happens
2038 * sometimes with phantom devices.
2040 ata_dev_printk(dev, KERN_DEBUG,
2041 "both IDENTIFYs aborted, assuming NODEV\n");
2046 reason = "I/O error";
2050 /* Falling back doesn't make sense if ID data was read
2051 * successfully at least once.
2055 swap_buf_le16(id, ATA_ID_WORDS);
2059 reason = "device reports invalid type";
2061 if (class == ATA_DEV_ATA) {
2062 if (!ata_id_is_ata(id) && !ata_id_is_cfa(id))
2065 if (ata_id_is_ata(id))
2069 if (!tried_spinup && (id[2] == 0x37c8 || id[2] == 0x738c)) {
2072 * Drive powered-up in standby mode, and requires a specific
2073 * SET_FEATURES spin-up subcommand before it will accept
2074 * anything other than the original IDENTIFY command.
2076 err_mask = ata_dev_set_feature(dev, SETFEATURES_SPINUP, 0);
2077 if (err_mask && id[2] != 0x738c) {
2079 reason = "SPINUP failed";
2083 * If the drive initially returned incomplete IDENTIFY info,
2084 * we now must reissue the IDENTIFY command.
2086 if (id[2] == 0x37c8)
2090 if ((flags & ATA_READID_POSTRESET) && class == ATA_DEV_ATA) {
2092 * The exact sequence expected by certain pre-ATA4 drives is:
2094 * IDENTIFY (optional in early ATA)
2095 * INITIALIZE DEVICE PARAMETERS (later IDE and ATA)
2097 * Some drives were very specific about that exact sequence.
2099 * Note that ATA4 says lba is mandatory so the second check
2100 * shoud never trigger.
2102 if (ata_id_major_version(id) < 4 || !ata_id_has_lba(id)) {
2103 err_mask = ata_dev_init_params(dev, id[3], id[6]);
2106 reason = "INIT_DEV_PARAMS failed";
2110 /* current CHS translation info (id[53-58]) might be
2111 * changed. reread the identify device info.
2113 flags &= ~ATA_READID_POSTRESET;
2123 if (ata_msg_warn(ap))
2124 ata_dev_printk(dev, KERN_WARNING, "failed to IDENTIFY "
2125 "(%s, err_mask=0x%x)\n", reason, err_mask);
2129 static inline u8 ata_dev_knobble(struct ata_device *dev)
2131 struct ata_port *ap = dev->link->ap;
2132 return ((ap->cbl == ATA_CBL_SATA) && (!ata_id_is_sata(dev->id)));
2135 static void ata_dev_config_ncq(struct ata_device *dev,
2136 char *desc, size_t desc_sz)
2138 struct ata_port *ap = dev->link->ap;
2139 int hdepth = 0, ddepth = ata_id_queue_depth(dev->id);
2141 if (!ata_id_has_ncq(dev->id)) {
2145 if (dev->horkage & ATA_HORKAGE_NONCQ) {
2146 snprintf(desc, desc_sz, "NCQ (not used)");
2149 if (ap->flags & ATA_FLAG_NCQ) {
2150 hdepth = min(ap->scsi_host->can_queue, ATA_MAX_QUEUE - 1);
2151 dev->flags |= ATA_DFLAG_NCQ;
2154 if (hdepth >= ddepth)
2155 snprintf(desc, desc_sz, "NCQ (depth %d)", ddepth);
2157 snprintf(desc, desc_sz, "NCQ (depth %d/%d)", hdepth, ddepth);
2161 * ata_dev_configure - Configure the specified ATA/ATAPI device
2162 * @dev: Target device to configure
2164 * Configure @dev according to @dev->id. Generic and low-level
2165 * driver specific fixups are also applied.
2168 * Kernel thread context (may sleep)
2171 * 0 on success, -errno otherwise
2173 int ata_dev_configure(struct ata_device *dev)
2175 struct ata_port *ap = dev->link->ap;
2176 struct ata_eh_context *ehc = &dev->link->eh_context;
2177 int print_info = ehc->i.flags & ATA_EHI_PRINTINFO;
2178 const u16 *id = dev->id;
2179 unsigned long xfer_mask;
2180 char revbuf[7]; /* XYZ-99\0 */
2181 char fwrevbuf[ATA_ID_FW_REV_LEN+1];
2182 char modelbuf[ATA_ID_PROD_LEN+1];
2185 if (!ata_dev_enabled(dev) && ata_msg_info(ap)) {
2186 ata_dev_printk(dev, KERN_INFO, "%s: ENTER/EXIT -- nodev\n",
2191 if (ata_msg_probe(ap))
2192 ata_dev_printk(dev, KERN_DEBUG, "%s: ENTER\n", __func__);
2195 dev->horkage |= ata_dev_blacklisted(dev);
2196 ata_force_horkage(dev);
2198 if (dev->horkage & ATA_HORKAGE_DISABLE) {
2199 ata_dev_printk(dev, KERN_INFO,
2200 "unsupported device, disabling\n");
2201 ata_dev_disable(dev);
2205 if ((!atapi_enabled || (ap->flags & ATA_FLAG_NO_ATAPI)) &&
2206 dev->class == ATA_DEV_ATAPI) {
2207 ata_dev_printk(dev, KERN_WARNING,
2208 "WARNING: ATAPI is %s, device ignored.\n",
2209 atapi_enabled ? "not supported with this driver"
2211 ata_dev_disable(dev);
2215 /* let ACPI work its magic */
2216 rc = ata_acpi_on_devcfg(dev);
2220 /* massage HPA, do it early as it might change IDENTIFY data */
2221 rc = ata_hpa_resize(dev);
2225 /* print device capabilities */
2226 if (ata_msg_probe(ap))
2227 ata_dev_printk(dev, KERN_DEBUG,
2228 "%s: cfg 49:%04x 82:%04x 83:%04x 84:%04x "
2229 "85:%04x 86:%04x 87:%04x 88:%04x\n",
2231 id[49], id[82], id[83], id[84],
2232 id[85], id[86], id[87], id[88]);
2234 /* initialize to-be-configured parameters */
2235 dev->flags &= ~ATA_DFLAG_CFG_MASK;
2236 dev->max_sectors = 0;
2244 * common ATA, ATAPI feature tests
2247 /* find max transfer mode; for printk only */
2248 xfer_mask = ata_id_xfermask(id);
2250 if (ata_msg_probe(ap))
2253 /* SCSI only uses 4-char revisions, dump full 8 chars from ATA */
2254 ata_id_c_string(dev->id, fwrevbuf, ATA_ID_FW_REV,
2257 ata_id_c_string(dev->id, modelbuf, ATA_ID_PROD,
2260 /* ATA-specific feature tests */
2261 if (dev->class == ATA_DEV_ATA) {
2262 if (ata_id_is_cfa(id)) {
2263 if (id[162] & 1) /* CPRM may make this media unusable */
2264 ata_dev_printk(dev, KERN_WARNING,
2265 "supports DRM functions and may "
2266 "not be fully accessable.\n");
2267 snprintf(revbuf, 7, "CFA");
2269 snprintf(revbuf, 7, "ATA-%d", ata_id_major_version(id));
2270 /* Warn the user if the device has TPM extensions */
2271 if (ata_id_has_tpm(id))
2272 ata_dev_printk(dev, KERN_WARNING,
2273 "supports DRM functions and may "
2274 "not be fully accessable.\n");
2277 dev->n_sectors = ata_id_n_sectors(id);
2279 if (dev->id[59] & 0x100)
2280 dev->multi_count = dev->id[59] & 0xff;
2282 if (ata_id_has_lba(id)) {
2283 const char *lba_desc;
2287 dev->flags |= ATA_DFLAG_LBA;
2288 if (ata_id_has_lba48(id)) {
2289 dev->flags |= ATA_DFLAG_LBA48;
2292 if (dev->n_sectors >= (1UL << 28) &&
2293 ata_id_has_flush_ext(id))
2294 dev->flags |= ATA_DFLAG_FLUSH_EXT;
2298 ata_dev_config_ncq(dev, ncq_desc, sizeof(ncq_desc));
2300 /* print device info to dmesg */
2301 if (ata_msg_drv(ap) && print_info) {
2302 ata_dev_printk(dev, KERN_INFO,
2303 "%s: %s, %s, max %s\n",
2304 revbuf, modelbuf, fwrevbuf,
2305 ata_mode_string(xfer_mask));
2306 ata_dev_printk(dev, KERN_INFO,
2307 "%Lu sectors, multi %u: %s %s\n",
2308 (unsigned long long)dev->n_sectors,
2309 dev->multi_count, lba_desc, ncq_desc);
2314 /* Default translation */
2315 dev->cylinders = id[1];
2317 dev->sectors = id[6];
2319 if (ata_id_current_chs_valid(id)) {
2320 /* Current CHS translation is valid. */
2321 dev->cylinders = id[54];
2322 dev->heads = id[55];
2323 dev->sectors = id[56];
2326 /* print device info to dmesg */
2327 if (ata_msg_drv(ap) && print_info) {
2328 ata_dev_printk(dev, KERN_INFO,
2329 "%s: %s, %s, max %s\n",
2330 revbuf, modelbuf, fwrevbuf,
2331 ata_mode_string(xfer_mask));
2332 ata_dev_printk(dev, KERN_INFO,
2333 "%Lu sectors, multi %u, CHS %u/%u/%u\n",
2334 (unsigned long long)dev->n_sectors,
2335 dev->multi_count, dev->cylinders,
2336 dev->heads, dev->sectors);
2343 /* ATAPI-specific feature tests */
2344 else if (dev->class == ATA_DEV_ATAPI) {
2345 const char *cdb_intr_string = "";
2346 const char *atapi_an_string = "";
2347 const char *dma_dir_string = "";
2350 rc = atapi_cdb_len(id);
2351 if ((rc < 12) || (rc > ATAPI_CDB_LEN)) {
2352 if (ata_msg_warn(ap))
2353 ata_dev_printk(dev, KERN_WARNING,
2354 "unsupported CDB len\n");
2358 dev->cdb_len = (unsigned int) rc;
2360 /* Enable ATAPI AN if both the host and device have
2361 * the support. If PMP is attached, SNTF is required
2362 * to enable ATAPI AN to discern between PHY status
2363 * changed notifications and ATAPI ANs.
2365 if ((ap->flags & ATA_FLAG_AN) && ata_id_has_atapi_AN(id) &&
2366 (!sata_pmp_attached(ap) ||
2367 sata_scr_read(&ap->link, SCR_NOTIFICATION, &sntf) == 0)) {
2368 unsigned int err_mask;
2370 /* issue SET feature command to turn this on */
2371 err_mask = ata_dev_set_feature(dev,
2372 SETFEATURES_SATA_ENABLE, SATA_AN);
2374 ata_dev_printk(dev, KERN_ERR,
2375 "failed to enable ATAPI AN "
2376 "(err_mask=0x%x)\n", err_mask);
2378 dev->flags |= ATA_DFLAG_AN;
2379 atapi_an_string = ", ATAPI AN";
2383 if (ata_id_cdb_intr(dev->id)) {
2384 dev->flags |= ATA_DFLAG_CDB_INTR;
2385 cdb_intr_string = ", CDB intr";
2388 if (atapi_dmadir || atapi_id_dmadir(dev->id)) {
2389 dev->flags |= ATA_DFLAG_DMADIR;
2390 dma_dir_string = ", DMADIR";
2393 /* print device info to dmesg */
2394 if (ata_msg_drv(ap) && print_info)
2395 ata_dev_printk(dev, KERN_INFO,
2396 "ATAPI: %s, %s, max %s%s%s%s\n",
2398 ata_mode_string(xfer_mask),
2399 cdb_intr_string, atapi_an_string,
2403 /* determine max_sectors */
2404 dev->max_sectors = ATA_MAX_SECTORS;
2405 if (dev->flags & ATA_DFLAG_LBA48)
2406 dev->max_sectors = ATA_MAX_SECTORS_LBA48;
2408 if (!(dev->horkage & ATA_HORKAGE_IPM)) {
2409 if (ata_id_has_hipm(dev->id))
2410 dev->flags |= ATA_DFLAG_HIPM;
2411 if (ata_id_has_dipm(dev->id))
2412 dev->flags |= ATA_DFLAG_DIPM;
2415 /* Limit PATA drive on SATA cable bridge transfers to udma5,
2417 if (ata_dev_knobble(dev)) {
2418 if (ata_msg_drv(ap) && print_info)
2419 ata_dev_printk(dev, KERN_INFO,
2420 "applying bridge limits\n");
2421 dev->udma_mask &= ATA_UDMA5;
2422 dev->max_sectors = ATA_MAX_SECTORS;
2425 if ((dev->class == ATA_DEV_ATAPI) &&
2426 (atapi_command_packet_set(id) == TYPE_TAPE)) {
2427 dev->max_sectors = ATA_MAX_SECTORS_TAPE;
2428 dev->horkage |= ATA_HORKAGE_STUCK_ERR;
2431 if (dev->horkage & ATA_HORKAGE_MAX_SEC_128)
2432 dev->max_sectors = min_t(unsigned int, ATA_MAX_SECTORS_128,
2435 if (ata_dev_blacklisted(dev) & ATA_HORKAGE_IPM) {
2436 dev->horkage |= ATA_HORKAGE_IPM;
2438 /* reset link pm_policy for this port to no pm */
2439 ap->pm_policy = MAX_PERFORMANCE;
2442 if (ap->ops->dev_config)
2443 ap->ops->dev_config(dev);
2445 if (dev->horkage & ATA_HORKAGE_DIAGNOSTIC) {
2446 /* Let the user know. We don't want to disallow opens for
2447 rescue purposes, or in case the vendor is just a blithering
2448 idiot. Do this after the dev_config call as some controllers
2449 with buggy firmware may want to avoid reporting false device
2453 ata_dev_printk(dev, KERN_WARNING,
2454 "Drive reports diagnostics failure. This may indicate a drive\n");
2455 ata_dev_printk(dev, KERN_WARNING,
2456 "fault or invalid emulation. Contact drive vendor for information.\n");
2463 if (ata_msg_probe(ap))
2464 ata_dev_printk(dev, KERN_DEBUG,
2465 "%s: EXIT, err\n", __func__);
2470 * ata_cable_40wire - return 40 wire cable type
2473 * Helper method for drivers which want to hardwire 40 wire cable
2477 int ata_cable_40wire(struct ata_port *ap)
2479 return ATA_CBL_PATA40;
2483 * ata_cable_80wire - return 80 wire cable type
2486 * Helper method for drivers which want to hardwire 80 wire cable
2490 int ata_cable_80wire(struct ata_port *ap)
2492 return ATA_CBL_PATA80;
2496 * ata_cable_unknown - return unknown PATA cable.
2499 * Helper method for drivers which have no PATA cable detection.
2502 int ata_cable_unknown(struct ata_port *ap)
2504 return ATA_CBL_PATA_UNK;
2508 * ata_cable_ignore - return ignored PATA cable.
2511 * Helper method for drivers which don't use cable type to limit
2514 int ata_cable_ignore(struct ata_port *ap)
2516 return ATA_CBL_PATA_IGN;
2520 * ata_cable_sata - return SATA cable type
2523 * Helper method for drivers which have SATA cables
2526 int ata_cable_sata(struct ata_port *ap)
2528 return ATA_CBL_SATA;
2532 * ata_bus_probe - Reset and probe ATA bus
2535 * Master ATA bus probing function. Initiates a hardware-dependent
2536 * bus reset, then attempts to identify any devices found on
2540 * PCI/etc. bus probe sem.
2543 * Zero on success, negative errno otherwise.
2546 int ata_bus_probe(struct ata_port *ap)
2548 unsigned int classes[ATA_MAX_DEVICES];
2549 int tries[ATA_MAX_DEVICES];
2551 struct ata_device *dev;
2555 ata_link_for_each_dev(dev, &ap->link)
2556 tries[dev->devno] = ATA_PROBE_MAX_TRIES;
2559 ata_link_for_each_dev(dev, &ap->link) {
2560 /* If we issue an SRST then an ATA drive (not ATAPI)
2561 * may change configuration and be in PIO0 timing. If
2562 * we do a hard reset (or are coming from power on)
2563 * this is true for ATA or ATAPI. Until we've set a
2564 * suitable controller mode we should not touch the
2565 * bus as we may be talking too fast.
2567 dev->pio_mode = XFER_PIO_0;
2569 /* If the controller has a pio mode setup function
2570 * then use it to set the chipset to rights. Don't
2571 * touch the DMA setup as that will be dealt with when
2572 * configuring devices.
2574 if (ap->ops->set_piomode)
2575 ap->ops->set_piomode(ap, dev);
2578 /* reset and determine device classes */
2579 ap->ops->phy_reset(ap);
2581 ata_link_for_each_dev(dev, &ap->link) {
2582 if (!(ap->flags & ATA_FLAG_DISABLED) &&
2583 dev->class != ATA_DEV_UNKNOWN)
2584 classes[dev->devno] = dev->class;
2586 classes[dev->devno] = ATA_DEV_NONE;
2588 dev->class = ATA_DEV_UNKNOWN;
2593 /* read IDENTIFY page and configure devices. We have to do the identify
2594 specific sequence bass-ackwards so that PDIAG- is released by
2597 ata_link_for_each_dev_reverse(dev, &ap->link) {
2598 if (tries[dev->devno])
2599 dev->class = classes[dev->devno];
2601 if (!ata_dev_enabled(dev))
2604 rc = ata_dev_read_id(dev, &dev->class, ATA_READID_POSTRESET,
2610 /* Now ask for the cable type as PDIAG- should have been released */
2611 if (ap->ops->cable_detect)
2612 ap->cbl = ap->ops->cable_detect(ap);
2614 /* We may have SATA bridge glue hiding here irrespective of the
2615 reported cable types and sensed types */
2616 ata_link_for_each_dev(dev, &ap->link) {
2617 if (!ata_dev_enabled(dev))
2619 /* SATA drives indicate we have a bridge. We don't know which
2620 end of the link the bridge is which is a problem */
2621 if (ata_id_is_sata(dev->id))
2622 ap->cbl = ATA_CBL_SATA;
2625 /* After the identify sequence we can now set up the devices. We do
2626 this in the normal order so that the user doesn't get confused */
2628 ata_link_for_each_dev(dev, &ap->link) {
2629 if (!ata_dev_enabled(dev))
2632 ap->link.eh_context.i.flags |= ATA_EHI_PRINTINFO;
2633 rc = ata_dev_configure(dev);
2634 ap->link.eh_context.i.flags &= ~ATA_EHI_PRINTINFO;
2639 /* configure transfer mode */
2640 rc = ata_set_mode(&ap->link, &dev);
2644 ata_link_for_each_dev(dev, &ap->link)
2645 if (ata_dev_enabled(dev))
2648 /* no device present, disable port */
2649 ata_port_disable(ap);
2653 tries[dev->devno]--;
2657 /* eeek, something went very wrong, give up */
2658 tries[dev->devno] = 0;
2662 /* give it just one more chance */
2663 tries[dev->devno] = min(tries[dev->devno], 1);
2665 if (tries[dev->devno] == 1) {
2666 /* This is the last chance, better to slow
2667 * down than lose it.
2669 sata_down_spd_limit(&ap->link);
2670 ata_down_xfermask_limit(dev, ATA_DNXFER_PIO);
2674 if (!tries[dev->devno])
2675 ata_dev_disable(dev);
2681 * ata_port_probe - Mark port as enabled
2682 * @ap: Port for which we indicate enablement
2684 * Modify @ap data structure such that the system
2685 * thinks that the entire port is enabled.
2687 * LOCKING: host lock, or some other form of
2691 void ata_port_probe(struct ata_port *ap)
2693 ap->flags &= ~ATA_FLAG_DISABLED;
2697 * sata_print_link_status - Print SATA link status
2698 * @link: SATA link to printk link status about
2700 * This function prints link speed and status of a SATA link.
2705 static void sata_print_link_status(struct ata_link *link)
2707 u32 sstatus, scontrol, tmp;
2709 if (sata_scr_read(link, SCR_STATUS, &sstatus))
2711 sata_scr_read(link, SCR_CONTROL, &scontrol);
2713 if (ata_link_online(link)) {
2714 tmp = (sstatus >> 4) & 0xf;
2715 ata_link_printk(link, KERN_INFO,
2716 "SATA link up %s (SStatus %X SControl %X)\n",
2717 sata_spd_string(tmp), sstatus, scontrol);
2719 ata_link_printk(link, KERN_INFO,
2720 "SATA link down (SStatus %X SControl %X)\n",
2726 * ata_dev_pair - return other device on cable
2729 * Obtain the other device on the same cable, or if none is
2730 * present NULL is returned
2733 struct ata_device *ata_dev_pair(struct ata_device *adev)
2735 struct ata_link *link = adev->link;
2736 struct ata_device *pair = &link->device[1 - adev->devno];
2737 if (!ata_dev_enabled(pair))
2743 * ata_port_disable - Disable port.
2744 * @ap: Port to be disabled.
2746 * Modify @ap data structure such that the system
2747 * thinks that the entire port is disabled, and should
2748 * never attempt to probe or communicate with devices
2751 * LOCKING: host lock, or some other form of
2755 void ata_port_disable(struct ata_port *ap)
2757 ap->link.device[0].class = ATA_DEV_NONE;
2758 ap->link.device[1].class = ATA_DEV_NONE;
2759 ap->flags |= ATA_FLAG_DISABLED;
2763 * sata_down_spd_limit - adjust SATA spd limit downward
2764 * @link: Link to adjust SATA spd limit for
2766 * Adjust SATA spd limit of @link downward. Note that this
2767 * function only adjusts the limit. The change must be applied
2768 * using sata_set_spd().
2771 * Inherited from caller.
2774 * 0 on success, negative errno on failure
2776 int sata_down_spd_limit(struct ata_link *link)
2778 u32 sstatus, spd, mask;
2781 if (!sata_scr_valid(link))
2784 /* If SCR can be read, use it to determine the current SPD.
2785 * If not, use cached value in link->sata_spd.
2787 rc = sata_scr_read(link, SCR_STATUS, &sstatus);
2789 spd = (sstatus >> 4) & 0xf;
2791 spd = link->sata_spd;
2793 mask = link->sata_spd_limit;
2797 /* unconditionally mask off the highest bit */
2798 highbit = fls(mask) - 1;
2799 mask &= ~(1 << highbit);
2801 /* Mask off all speeds higher than or equal to the current
2802 * one. Force 1.5Gbps if current SPD is not available.
2805 mask &= (1 << (spd - 1)) - 1;
2809 /* were we already at the bottom? */
2813 link->sata_spd_limit = mask;
2815 ata_link_printk(link, KERN_WARNING, "limiting SATA link speed to %s\n",
2816 sata_spd_string(fls(mask)));
2821 static int __sata_set_spd_needed(struct ata_link *link, u32 *scontrol)
2823 struct ata_link *host_link = &link->ap->link;
2824 u32 limit, target, spd;
2826 limit = link->sata_spd_limit;
2828 /* Don't configure downstream link faster than upstream link.
2829 * It doesn't speed up anything and some PMPs choke on such
2832 if (!ata_is_host_link(link) && host_link->sata_spd)
2833 limit &= (1 << host_link->sata_spd) - 1;
2835 if (limit == UINT_MAX)
2838 target = fls(limit);
2840 spd = (*scontrol >> 4) & 0xf;
2841 *scontrol = (*scontrol & ~0xf0) | ((target & 0xf) << 4);
2843 return spd != target;
2847 * sata_set_spd_needed - is SATA spd configuration needed
2848 * @link: Link in question
2850 * Test whether the spd limit in SControl matches
2851 * @link->sata_spd_limit. This function is used to determine
2852 * whether hardreset is necessary to apply SATA spd
2856 * Inherited from caller.
2859 * 1 if SATA spd configuration is needed, 0 otherwise.
2861 static int sata_set_spd_needed(struct ata_link *link)
2865 if (sata_scr_read(link, SCR_CONTROL, &scontrol))
2868 return __sata_set_spd_needed(link, &scontrol);
2872 * sata_set_spd - set SATA spd according to spd limit
2873 * @link: Link to set SATA spd for
2875 * Set SATA spd of @link according to sata_spd_limit.
2878 * Inherited from caller.
2881 * 0 if spd doesn't need to be changed, 1 if spd has been
2882 * changed. Negative errno if SCR registers are inaccessible.
2884 int sata_set_spd(struct ata_link *link)
2889 if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
2892 if (!__sata_set_spd_needed(link, &scontrol))
2895 if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol)))
2902 * This mode timing computation functionality is ported over from
2903 * drivers/ide/ide-timing.h and was originally written by Vojtech Pavlik
2906 * PIO 0-4, MWDMA 0-2 and UDMA 0-6 timings (in nanoseconds).
2907 * These were taken from ATA/ATAPI-6 standard, rev 0a, except
2908 * for UDMA6, which is currently supported only by Maxtor drives.
2910 * For PIO 5/6 MWDMA 3/4 see the CFA specification 3.0.
2913 static const struct ata_timing ata_timing[] = {
2914 /* { XFER_PIO_SLOW, 120, 290, 240, 960, 290, 240, 960, 0 }, */
2915 { XFER_PIO_0, 70, 290, 240, 600, 165, 150, 600, 0 },
2916 { XFER_PIO_1, 50, 290, 93, 383, 125, 100, 383, 0 },
2917 { XFER_PIO_2, 30, 290, 40, 330, 100, 90, 240, 0 },
2918 { XFER_PIO_3, 30, 80, 70, 180, 80, 70, 180, 0 },
2919 { XFER_PIO_4, 25, 70, 25, 120, 70, 25, 120, 0 },
2920 { XFER_PIO_5, 15, 65, 25, 100, 65, 25, 100, 0 },
2921 { XFER_PIO_6, 10, 55, 20, 80, 55, 20, 80, 0 },
2923 { XFER_SW_DMA_0, 120, 0, 0, 0, 480, 480, 960, 0 },
2924 { XFER_SW_DMA_1, 90, 0, 0, 0, 240, 240, 480, 0 },
2925 { XFER_SW_DMA_2, 60, 0, 0, 0, 120, 120, 240, 0 },
2927 { XFER_MW_DMA_0, 60, 0, 0, 0, 215, 215, 480, 0 },
2928 { XFER_MW_DMA_1, 45, 0, 0, 0, 80, 50, 150, 0 },
2929 { XFER_MW_DMA_2, 25, 0, 0, 0, 70, 25, 120, 0 },
2930 { XFER_MW_DMA_3, 25, 0, 0, 0, 65, 25, 100, 0 },
2931 { XFER_MW_DMA_4, 25, 0, 0, 0, 55, 20, 80, 0 },
2933 /* { XFER_UDMA_SLOW, 0, 0, 0, 0, 0, 0, 0, 150 }, */
2934 { XFER_UDMA_0, 0, 0, 0, 0, 0, 0, 0, 120 },
2935 { XFER_UDMA_1, 0, 0, 0, 0, 0, 0, 0, 80 },
2936 { XFER_UDMA_2, 0, 0, 0, 0, 0, 0, 0, 60 },
2937 { XFER_UDMA_3, 0, 0, 0, 0, 0, 0, 0, 45 },
2938 { XFER_UDMA_4, 0, 0, 0, 0, 0, 0, 0, 30 },
2939 { XFER_UDMA_5, 0, 0, 0, 0, 0, 0, 0, 20 },
2940 { XFER_UDMA_6, 0, 0, 0, 0, 0, 0, 0, 15 },
2945 #define ENOUGH(v, unit) (((v)-1)/(unit)+1)
2946 #define EZ(v, unit) ((v)?ENOUGH(v, unit):0)
2948 static void ata_timing_quantize(const struct ata_timing *t, struct ata_timing *q, int T, int UT)
2950 q->setup = EZ(t->setup * 1000, T);
2951 q->act8b = EZ(t->act8b * 1000, T);
2952 q->rec8b = EZ(t->rec8b * 1000, T);
2953 q->cyc8b = EZ(t->cyc8b * 1000, T);
2954 q->active = EZ(t->active * 1000, T);
2955 q->recover = EZ(t->recover * 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_CYCLE ) m->cycle = max(a->cycle, b->cycle);
2970 if (what & ATA_TIMING_UDMA ) m->udma = max(a->udma, b->udma);
2973 const struct ata_timing *ata_timing_find_mode(u8 xfer_mode)
2975 const struct ata_timing *t = ata_timing;
2977 while (xfer_mode > t->mode)
2980 if (xfer_mode == t->mode)
2985 int ata_timing_compute(struct ata_device *adev, unsigned short speed,
2986 struct ata_timing *t, int T, int UT)
2988 const struct ata_timing *s;
2989 struct ata_timing p;
2995 if (!(s = ata_timing_find_mode(speed)))
2998 memcpy(t, s, sizeof(*s));
3001 * If the drive is an EIDE drive, it can tell us it needs extended
3002 * PIO/MW_DMA cycle timing.
3005 if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE drive */
3006 memset(&p, 0, sizeof(p));
3007 if (speed >= XFER_PIO_0 && speed <= XFER_SW_DMA_0) {
3008 if (speed <= XFER_PIO_2) p.cycle = p.cyc8b = adev->id[ATA_ID_EIDE_PIO];
3009 else p.cycle = p.cyc8b = adev->id[ATA_ID_EIDE_PIO_IORDY];
3010 } else if (speed >= XFER_MW_DMA_0 && speed <= XFER_MW_DMA_2) {
3011 p.cycle = adev->id[ATA_ID_EIDE_DMA_MIN];
3013 ata_timing_merge(&p, t, t, ATA_TIMING_CYCLE | ATA_TIMING_CYC8B);
3017 * Convert the timing to bus clock counts.
3020 ata_timing_quantize(t, t, T, UT);
3023 * Even in DMA/UDMA modes we still use PIO access for IDENTIFY,
3024 * S.M.A.R.T * and some other commands. We have to ensure that the
3025 * DMA cycle timing is slower/equal than the fastest PIO timing.
3028 if (speed > XFER_PIO_6) {
3029 ata_timing_compute(adev, adev->pio_mode, &p, T, UT);
3030 ata_timing_merge(&p, t, t, ATA_TIMING_ALL);
3034 * Lengthen active & recovery time so that cycle time is correct.
3037 if (t->act8b + t->rec8b < t->cyc8b) {
3038 t->act8b += (t->cyc8b - (t->act8b + t->rec8b)) / 2;
3039 t->rec8b = t->cyc8b - t->act8b;
3042 if (t->active + t->recover < t->cycle) {
3043 t->active += (t->cycle - (t->active + t->recover)) / 2;
3044 t->recover = t->cycle - t->active;
3047 /* In a few cases quantisation may produce enough errors to
3048 leave t->cycle too low for the sum of active and recovery
3049 if so we must correct this */
3050 if (t->active + t->recover > t->cycle)
3051 t->cycle = t->active + t->recover;
3057 * ata_timing_cycle2mode - find xfer mode for the specified cycle duration
3058 * @xfer_shift: ATA_SHIFT_* value for transfer type to examine.
3059 * @cycle: cycle duration in ns
3061 * Return matching xfer mode for @cycle. The returned mode is of
3062 * the transfer type specified by @xfer_shift. If @cycle is too
3063 * slow for @xfer_shift, 0xff is returned. If @cycle is faster
3064 * than the fastest known mode, the fasted mode is returned.
3070 * Matching xfer_mode, 0xff if no match found.
3072 u8 ata_timing_cycle2mode(unsigned int xfer_shift, int cycle)
3074 u8 base_mode = 0xff, last_mode = 0xff;
3075 const struct ata_xfer_ent *ent;
3076 const struct ata_timing *t;
3078 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
3079 if (ent->shift == xfer_shift)
3080 base_mode = ent->base;
3082 for (t = ata_timing_find_mode(base_mode);
3083 t && ata_xfer_mode2shift(t->mode) == xfer_shift; t++) {
3084 unsigned short this_cycle;
3086 switch (xfer_shift) {
3088 case ATA_SHIFT_MWDMA:
3089 this_cycle = t->cycle;
3091 case ATA_SHIFT_UDMA:
3092 this_cycle = t->udma;
3098 if (cycle > this_cycle)
3101 last_mode = t->mode;
3108 * ata_down_xfermask_limit - adjust dev xfer masks downward
3109 * @dev: Device to adjust xfer masks
3110 * @sel: ATA_DNXFER_* selector
3112 * Adjust xfer masks of @dev downward. Note that this function
3113 * does not apply the change. Invoking ata_set_mode() afterwards
3114 * will apply the limit.
3117 * Inherited from caller.
3120 * 0 on success, negative errno on failure
3122 int ata_down_xfermask_limit(struct ata_device *dev, unsigned int sel)
3125 unsigned long orig_mask, xfer_mask;
3126 unsigned long pio_mask, mwdma_mask, udma_mask;
3129 quiet = !!(sel & ATA_DNXFER_QUIET);
3130 sel &= ~ATA_DNXFER_QUIET;
3132 xfer_mask = orig_mask = ata_pack_xfermask(dev->pio_mask,
3135 ata_unpack_xfermask(xfer_mask, &pio_mask, &mwdma_mask, &udma_mask);
3138 case ATA_DNXFER_PIO:
3139 highbit = fls(pio_mask) - 1;
3140 pio_mask &= ~(1 << highbit);
3143 case ATA_DNXFER_DMA:
3145 highbit = fls(udma_mask) - 1;
3146 udma_mask &= ~(1 << highbit);
3149 } else if (mwdma_mask) {
3150 highbit = fls(mwdma_mask) - 1;
3151 mwdma_mask &= ~(1 << highbit);
3157 case ATA_DNXFER_40C:
3158 udma_mask &= ATA_UDMA_MASK_40C;
3161 case ATA_DNXFER_FORCE_PIO0:
3163 case ATA_DNXFER_FORCE_PIO:
3172 xfer_mask &= ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask);
3174 if (!(xfer_mask & ATA_MASK_PIO) || xfer_mask == orig_mask)
3178 if (xfer_mask & (ATA_MASK_MWDMA | ATA_MASK_UDMA))
3179 snprintf(buf, sizeof(buf), "%s:%s",
3180 ata_mode_string(xfer_mask),
3181 ata_mode_string(xfer_mask & ATA_MASK_PIO));
3183 snprintf(buf, sizeof(buf), "%s",
3184 ata_mode_string(xfer_mask));
3186 ata_dev_printk(dev, KERN_WARNING,
3187 "limiting speed to %s\n", buf);
3190 ata_unpack_xfermask(xfer_mask, &dev->pio_mask, &dev->mwdma_mask,
3196 static int ata_dev_set_mode(struct ata_device *dev)
3198 struct ata_eh_context *ehc = &dev->link->eh_context;
3199 const char *dev_err_whine = "";
3200 int ign_dev_err = 0;
3201 unsigned int err_mask;
3204 dev->flags &= ~ATA_DFLAG_PIO;
3205 if (dev->xfer_shift == ATA_SHIFT_PIO)
3206 dev->flags |= ATA_DFLAG_PIO;
3208 err_mask = ata_dev_set_xfermode(dev);
3210 if (err_mask & ~AC_ERR_DEV)
3214 ehc->i.flags |= ATA_EHI_POST_SETMODE;
3215 rc = ata_dev_revalidate(dev, ATA_DEV_UNKNOWN, 0);
3216 ehc->i.flags &= ~ATA_EHI_POST_SETMODE;
3220 if (dev->xfer_shift == ATA_SHIFT_PIO) {
3221 /* Old CFA may refuse this command, which is just fine */
3222 if (ata_id_is_cfa(dev->id))
3224 /* Catch several broken garbage emulations plus some pre
3226 if (ata_id_major_version(dev->id) == 0 &&
3227 dev->pio_mode <= XFER_PIO_2)
3229 /* Some very old devices and some bad newer ones fail
3230 any kind of SET_XFERMODE request but support PIO0-2
3231 timings and no IORDY */
3232 if (!ata_id_has_iordy(dev->id) && dev->pio_mode <= XFER_PIO_2)
3235 /* Early MWDMA devices do DMA but don't allow DMA mode setting.
3236 Don't fail an MWDMA0 set IFF the device indicates it is in MWDMA0 */
3237 if (dev->xfer_shift == ATA_SHIFT_MWDMA &&
3238 dev->dma_mode == XFER_MW_DMA_0 &&
3239 (dev->id[63] >> 8) & 1)
3242 /* if the device is actually configured correctly, ignore dev err */
3243 if (dev->xfer_mode == ata_xfer_mask2mode(ata_id_xfermask(dev->id)))
3246 if (err_mask & AC_ERR_DEV) {
3250 dev_err_whine = " (device error ignored)";
3253 DPRINTK("xfer_shift=%u, xfer_mode=0x%x\n",
3254 dev->xfer_shift, (int)dev->xfer_mode);
3256 ata_dev_printk(dev, KERN_INFO, "configured for %s%s\n",
3257 ata_mode_string(ata_xfer_mode2mask(dev->xfer_mode)),
3263 ata_dev_printk(dev, KERN_ERR, "failed to set xfermode "
3264 "(err_mask=0x%x)\n", err_mask);
3269 * ata_do_set_mode - Program timings and issue SET FEATURES - XFER
3270 * @link: link on which timings will be programmed
3271 * @r_failed_dev: out parameter for failed device
3273 * Standard implementation of the function used to tune and set
3274 * ATA device disk transfer mode (PIO3, UDMA6, etc.). If
3275 * ata_dev_set_mode() fails, pointer to the failing device is
3276 * returned in @r_failed_dev.
3279 * PCI/etc. bus probe sem.
3282 * 0 on success, negative errno otherwise
3285 int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev)
3287 struct ata_port *ap = link->ap;
3288 struct ata_device *dev;
3289 int rc = 0, used_dma = 0, found = 0;
3291 /* step 1: calculate xfer_mask */
3292 ata_link_for_each_dev(dev, link) {
3293 unsigned long pio_mask, dma_mask;
3294 unsigned int mode_mask;
3296 if (!ata_dev_enabled(dev))
3299 mode_mask = ATA_DMA_MASK_ATA;
3300 if (dev->class == ATA_DEV_ATAPI)
3301 mode_mask = ATA_DMA_MASK_ATAPI;
3302 else if (ata_id_is_cfa(dev->id))
3303 mode_mask = ATA_DMA_MASK_CFA;
3305 ata_dev_xfermask(dev);
3306 ata_force_xfermask(dev);
3308 pio_mask = ata_pack_xfermask(dev->pio_mask, 0, 0);
3309 dma_mask = ata_pack_xfermask(0, dev->mwdma_mask, dev->udma_mask);
3311 if (libata_dma_mask & mode_mask)
3312 dma_mask = ata_pack_xfermask(0, dev->mwdma_mask, dev->udma_mask);
3316 dev->pio_mode = ata_xfer_mask2mode(pio_mask);
3317 dev->dma_mode = ata_xfer_mask2mode(dma_mask);
3320 if (ata_dma_enabled(dev))
3326 /* step 2: always set host PIO timings */
3327 ata_link_for_each_dev(dev, link) {
3328 if (!ata_dev_enabled(dev))
3331 if (dev->pio_mode == 0xff) {
3332 ata_dev_printk(dev, KERN_WARNING, "no PIO support\n");
3337 dev->xfer_mode = dev->pio_mode;
3338 dev->xfer_shift = ATA_SHIFT_PIO;
3339 if (ap->ops->set_piomode)
3340 ap->ops->set_piomode(ap, dev);
3343 /* step 3: set host DMA timings */
3344 ata_link_for_each_dev(dev, link) {
3345 if (!ata_dev_enabled(dev) || !ata_dma_enabled(dev))
3348 dev->xfer_mode = dev->dma_mode;
3349 dev->xfer_shift = ata_xfer_mode2shift(dev->dma_mode);
3350 if (ap->ops->set_dmamode)
3351 ap->ops->set_dmamode(ap, dev);
3354 /* step 4: update devices' xfer mode */
3355 ata_link_for_each_dev(dev, link) {
3356 /* don't update suspended devices' xfer mode */
3357 if (!ata_dev_enabled(dev))
3360 rc = ata_dev_set_mode(dev);
3365 /* Record simplex status. If we selected DMA then the other
3366 * host channels are not permitted to do so.
3368 if (used_dma && (ap->host->flags & ATA_HOST_SIMPLEX))
3369 ap->host->simplex_claimed = ap;
3373 *r_failed_dev = dev;
3378 * ata_wait_ready - wait for link to become ready
3379 * @link: link to be waited on
3380 * @deadline: deadline jiffies for the operation
3381 * @check_ready: callback to check link readiness
3383 * Wait for @link to become ready. @check_ready should return
3384 * positive number if @link is ready, 0 if it isn't, -ENODEV if
3385 * link doesn't seem to be occupied, other errno for other error
3388 * Transient -ENODEV conditions are allowed for
3389 * ATA_TMOUT_FF_WAIT.
3395 * 0 if @linke is ready before @deadline; otherwise, -errno.
3397 int ata_wait_ready(struct ata_link *link, unsigned long deadline,
3398 int (*check_ready)(struct ata_link *link))
3400 unsigned long start = jiffies;
3401 unsigned long nodev_deadline = ata_deadline(start, ATA_TMOUT_FF_WAIT);
3404 if (time_after(nodev_deadline, deadline))
3405 nodev_deadline = deadline;
3408 unsigned long now = jiffies;
3411 ready = tmp = check_ready(link);
3415 /* -ENODEV could be transient. Ignore -ENODEV if link
3416 * is online. Also, some SATA devices take a long
3417 * time to clear 0xff after reset. For example,
3418 * HHD424020F7SV00 iVDR needs >= 800ms while Quantum
3419 * GoVault needs even more than that. Wait for
3420 * ATA_TMOUT_FF_WAIT on -ENODEV if link isn't offline.
3422 * Note that some PATA controllers (pata_ali) explode
3423 * if status register is read more than once when
3424 * there's no device attached.
3426 if (ready == -ENODEV) {
3427 if (ata_link_online(link))
3429 else if ((link->ap->flags & ATA_FLAG_SATA) &&
3430 !ata_link_offline(link) &&
3431 time_before(now, nodev_deadline))
3437 if (time_after(now, deadline))
3440 if (!warned && time_after(now, start + 5 * HZ) &&
3441 (deadline - now > 3 * HZ)) {
3442 ata_link_printk(link, KERN_WARNING,
3443 "link is slow to respond, please be patient "
3444 "(ready=%d)\n", tmp);
3453 * ata_wait_after_reset - wait for link to become ready after reset
3454 * @link: link to be waited on
3455 * @deadline: deadline jiffies for the operation
3456 * @check_ready: callback to check link readiness
3458 * Wait for @link to become ready after reset.
3464 * 0 if @linke is ready before @deadline; otherwise, -errno.
3466 int ata_wait_after_reset(struct ata_link *link, unsigned long deadline,
3467 int (*check_ready)(struct ata_link *link))
3469 msleep(ATA_WAIT_AFTER_RESET);
3471 return ata_wait_ready(link, deadline, check_ready);
3475 * sata_link_debounce - debounce SATA phy status
3476 * @link: ATA link to debounce SATA phy status for
3477 * @params: timing parameters { interval, duratinon, timeout } in msec
3478 * @deadline: deadline jiffies for the operation
3480 * Make sure SStatus of @link reaches stable state, determined by
3481 * holding the same value where DET is not 1 for @duration polled
3482 * every @interval, before @timeout. Timeout constraints the
3483 * beginning of the stable state. Because DET gets stuck at 1 on
3484 * some controllers after hot unplugging, this functions waits
3485 * until timeout then returns 0 if DET is stable at 1.
3487 * @timeout is further limited by @deadline. The sooner of the
3491 * Kernel thread context (may sleep)
3494 * 0 on success, -errno on failure.
3496 int sata_link_debounce(struct ata_link *link, const unsigned long *params,
3497 unsigned long deadline)
3499 unsigned long interval = params[0];
3500 unsigned long duration = params[1];
3501 unsigned long last_jiffies, t;
3505 t = ata_deadline(jiffies, params[2]);
3506 if (time_before(t, deadline))
3509 if ((rc = sata_scr_read(link, SCR_STATUS, &cur)))
3514 last_jiffies = jiffies;
3518 if ((rc = sata_scr_read(link, SCR_STATUS, &cur)))
3524 if (cur == 1 && time_before(jiffies, deadline))
3526 if (time_after(jiffies,
3527 ata_deadline(last_jiffies, duration)))
3532 /* unstable, start over */
3534 last_jiffies = jiffies;
3536 /* Check deadline. If debouncing failed, return
3537 * -EPIPE to tell upper layer to lower link speed.
3539 if (time_after(jiffies, deadline))
3545 * sata_link_resume - resume SATA link
3546 * @link: ATA link to resume SATA
3547 * @params: timing parameters { interval, duratinon, timeout } in msec
3548 * @deadline: deadline jiffies for the operation
3550 * Resume SATA phy @link and debounce it.
3553 * Kernel thread context (may sleep)
3556 * 0 on success, -errno on failure.
3558 int sata_link_resume(struct ata_link *link, const unsigned long *params,
3559 unsigned long deadline)
3561 u32 scontrol, serror;
3564 if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
3567 scontrol = (scontrol & 0x0f0) | 0x300;
3569 if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol)))
3572 /* Some PHYs react badly if SStatus is pounded immediately
3573 * after resuming. Delay 200ms before debouncing.
3577 if ((rc = sata_link_debounce(link, params, deadline)))
3580 /* clear SError, some PHYs require this even for SRST to work */
3581 if (!(rc = sata_scr_read(link, SCR_ERROR, &serror)))
3582 rc = sata_scr_write(link, SCR_ERROR, serror);
3584 return rc != -EINVAL ? rc : 0;
3588 * ata_std_prereset - prepare for reset
3589 * @link: ATA link to be reset
3590 * @deadline: deadline jiffies for the operation
3592 * @link is about to be reset. Initialize it. Failure from
3593 * prereset makes libata abort whole reset sequence and give up
3594 * that port, so prereset should be best-effort. It does its
3595 * best to prepare for reset sequence but if things go wrong, it
3596 * should just whine, not fail.
3599 * Kernel thread context (may sleep)
3602 * 0 on success, -errno otherwise.
3604 int ata_std_prereset(struct ata_link *link, unsigned long deadline)
3606 struct ata_port *ap = link->ap;
3607 struct ata_eh_context *ehc = &link->eh_context;
3608 const unsigned long *timing = sata_ehc_deb_timing(ehc);
3611 /* if we're about to do hardreset, nothing more to do */
3612 if (ehc->i.action & ATA_EH_HARDRESET)
3615 /* if SATA, resume link */
3616 if (ap->flags & ATA_FLAG_SATA) {
3617 rc = sata_link_resume(link, timing, deadline);
3618 /* whine about phy resume failure but proceed */
3619 if (rc && rc != -EOPNOTSUPP)
3620 ata_link_printk(link, KERN_WARNING, "failed to resume "
3621 "link for reset (errno=%d)\n", rc);
3624 /* no point in trying softreset on offline link */
3625 if (ata_link_offline(link))
3626 ehc->i.action &= ~ATA_EH_SOFTRESET;
3632 * sata_link_hardreset - reset link via SATA phy reset
3633 * @link: link to reset
3634 * @timing: timing parameters { interval, duratinon, timeout } in msec
3635 * @deadline: deadline jiffies for the operation
3636 * @online: optional out parameter indicating link onlineness
3637 * @check_ready: optional callback to check link readiness
3639 * SATA phy-reset @link using DET bits of SControl register.
3640 * After hardreset, link readiness is waited upon using
3641 * ata_wait_ready() if @check_ready is specified. LLDs are
3642 * allowed to not specify @check_ready and wait itself after this
3643 * function returns. Device classification is LLD's
3646 * *@online is set to one iff reset succeeded and @link is online
3650 * Kernel thread context (may sleep)
3653 * 0 on success, -errno otherwise.
3655 int sata_link_hardreset(struct ata_link *link, const unsigned long *timing,
3656 unsigned long deadline,
3657 bool *online, int (*check_ready)(struct ata_link *))
3667 if (sata_set_spd_needed(link)) {
3668 /* SATA spec says nothing about how to reconfigure
3669 * spd. To be on the safe side, turn off phy during
3670 * reconfiguration. This works for at least ICH7 AHCI
3673 if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
3676 scontrol = (scontrol & 0x0f0) | 0x304;
3678 if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol)))
3684 /* issue phy wake/reset */
3685 if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
3688 scontrol = (scontrol & 0x0f0) | 0x301;
3690 if ((rc = sata_scr_write_flush(link, SCR_CONTROL, scontrol)))
3693 /* Couldn't find anything in SATA I/II specs, but AHCI-1.1
3694 * 10.4.2 says at least 1 ms.
3698 /* bring link back */
3699 rc = sata_link_resume(link, timing, deadline);
3702 /* if link is offline nothing more to do */
3703 if (ata_link_offline(link))
3706 /* Link is online. From this point, -ENODEV too is an error. */
3710 if (sata_pmp_supported(link->ap) && ata_is_host_link(link)) {
3711 /* If PMP is supported, we have to do follow-up SRST.
3712 * Some PMPs don't send D2H Reg FIS after hardreset if
3713 * the first port is empty. Wait only for
3714 * ATA_TMOUT_PMP_SRST_WAIT.
3717 unsigned long pmp_deadline;
3719 pmp_deadline = ata_deadline(jiffies,
3720 ATA_TMOUT_PMP_SRST_WAIT);
3721 if (time_after(pmp_deadline, deadline))
3722 pmp_deadline = deadline;
3723 ata_wait_ready(link, pmp_deadline, check_ready);
3731 rc = ata_wait_ready(link, deadline, check_ready);
3733 if (rc && rc != -EAGAIN) {
3734 /* online is set iff link is online && reset succeeded */
3737 ata_link_printk(link, KERN_ERR,
3738 "COMRESET failed (errno=%d)\n", rc);
3740 DPRINTK("EXIT, rc=%d\n", rc);
3745 * sata_std_hardreset - COMRESET w/o waiting or classification
3746 * @link: link to reset
3747 * @class: resulting class of attached device
3748 * @deadline: deadline jiffies for the operation
3750 * Standard SATA COMRESET w/o waiting or classification.
3753 * Kernel thread context (may sleep)
3756 * 0 if link offline, -EAGAIN if link online, -errno on errors.
3758 int sata_std_hardreset(struct ata_link *link, unsigned int *class,
3759 unsigned long deadline)
3761 const unsigned long *timing = sata_ehc_deb_timing(&link->eh_context);
3766 rc = sata_link_hardreset(link, timing, deadline, &online, NULL);
3767 return online ? -EAGAIN : rc;
3771 * ata_std_postreset - standard postreset callback
3772 * @link: the target ata_link
3773 * @classes: classes of attached devices
3775 * This function is invoked after a successful reset. Note that
3776 * the device might have been reset more than once using
3777 * different reset methods before postreset is invoked.
3780 * Kernel thread context (may sleep)
3782 void ata_std_postreset(struct ata_link *link, unsigned int *classes)
3788 /* reset complete, clear SError */
3789 if (!sata_scr_read(link, SCR_ERROR, &serror))
3790 sata_scr_write(link, SCR_ERROR, serror);
3792 /* print link status */
3793 sata_print_link_status(link);
3799 * ata_dev_same_device - Determine whether new ID matches configured device
3800 * @dev: device to compare against
3801 * @new_class: class of the new device
3802 * @new_id: IDENTIFY page of the new device
3804 * Compare @new_class and @new_id against @dev and determine
3805 * whether @dev is the device indicated by @new_class and
3812 * 1 if @dev matches @new_class and @new_id, 0 otherwise.
3814 static int ata_dev_same_device(struct ata_device *dev, unsigned int new_class,
3817 const u16 *old_id = dev->id;
3818 unsigned char model[2][ATA_ID_PROD_LEN + 1];
3819 unsigned char serial[2][ATA_ID_SERNO_LEN + 1];
3821 if (dev->class != new_class) {
3822 ata_dev_printk(dev, KERN_INFO, "class mismatch %d != %d\n",
3823 dev->class, new_class);
3827 ata_id_c_string(old_id, model[0], ATA_ID_PROD, sizeof(model[0]));
3828 ata_id_c_string(new_id, model[1], ATA_ID_PROD, sizeof(model[1]));
3829 ata_id_c_string(old_id, serial[0], ATA_ID_SERNO, sizeof(serial[0]));
3830 ata_id_c_string(new_id, serial[1], ATA_ID_SERNO, sizeof(serial[1]));
3832 if (strcmp(model[0], model[1])) {
3833 ata_dev_printk(dev, KERN_INFO, "model number mismatch "
3834 "'%s' != '%s'\n", model[0], model[1]);
3838 if (strcmp(serial[0], serial[1])) {
3839 ata_dev_printk(dev, KERN_INFO, "serial number mismatch "
3840 "'%s' != '%s'\n", serial[0], serial[1]);
3848 * ata_dev_reread_id - Re-read IDENTIFY data
3849 * @dev: target ATA device
3850 * @readid_flags: read ID flags
3852 * Re-read IDENTIFY page and make sure @dev is still attached to
3856 * Kernel thread context (may sleep)
3859 * 0 on success, negative errno otherwise
3861 int ata_dev_reread_id(struct ata_device *dev, unsigned int readid_flags)
3863 unsigned int class = dev->class;
3864 u16 *id = (void *)dev->link->ap->sector_buf;
3868 rc = ata_dev_read_id(dev, &class, readid_flags, id);
3872 /* is the device still there? */
3873 if (!ata_dev_same_device(dev, class, id))
3876 memcpy(dev->id, id, sizeof(id[0]) * ATA_ID_WORDS);
3881 * ata_dev_revalidate - Revalidate ATA device
3882 * @dev: device to revalidate
3883 * @new_class: new class code
3884 * @readid_flags: read ID flags
3886 * Re-read IDENTIFY page, make sure @dev is still attached to the
3887 * port and reconfigure it according to the new IDENTIFY page.
3890 * Kernel thread context (may sleep)
3893 * 0 on success, negative errno otherwise
3895 int ata_dev_revalidate(struct ata_device *dev, unsigned int new_class,
3896 unsigned int readid_flags)
3898 u64 n_sectors = dev->n_sectors;
3901 if (!ata_dev_enabled(dev))
3904 /* fail early if !ATA && !ATAPI to avoid issuing [P]IDENTIFY to PMP */
3905 if (ata_class_enabled(new_class) &&
3906 new_class != ATA_DEV_ATA && new_class != ATA_DEV_ATAPI) {
3907 ata_dev_printk(dev, KERN_INFO, "class mismatch %u != %u\n",
3908 dev->class, new_class);
3914 rc = ata_dev_reread_id(dev, readid_flags);
3918 /* configure device according to the new ID */
3919 rc = ata_dev_configure(dev);
3923 /* verify n_sectors hasn't changed */
3924 if (dev->class == ATA_DEV_ATA && n_sectors &&
3925 dev->n_sectors != n_sectors) {
3926 ata_dev_printk(dev, KERN_INFO, "n_sectors mismatch "
3928 (unsigned long long)n_sectors,
3929 (unsigned long long)dev->n_sectors);
3931 /* restore original n_sectors */
3932 dev->n_sectors = n_sectors;
3941 ata_dev_printk(dev, KERN_ERR, "revalidation failed (errno=%d)\n", rc);
3945 struct ata_blacklist_entry {
3946 const char *model_num;
3947 const char *model_rev;
3948 unsigned long horkage;
3951 static const struct ata_blacklist_entry ata_device_blacklist [] = {
3952 /* Devices with DMA related problems under Linux */
3953 { "WDC AC11000H", NULL, ATA_HORKAGE_NODMA },
3954 { "WDC AC22100H", NULL, ATA_HORKAGE_NODMA },
3955 { "WDC AC32500H", NULL, ATA_HORKAGE_NODMA },
3956 { "WDC AC33100H", NULL, ATA_HORKAGE_NODMA },
3957 { "WDC AC31600H", NULL, ATA_HORKAGE_NODMA },
3958 { "WDC AC32100H", "24.09P07", ATA_HORKAGE_NODMA },
3959 { "WDC AC23200L", "21.10N21", ATA_HORKAGE_NODMA },
3960 { "Compaq CRD-8241B", NULL, ATA_HORKAGE_NODMA },
3961 { "CRD-8400B", NULL, ATA_HORKAGE_NODMA },
3962 { "CRD-8480B", NULL, ATA_HORKAGE_NODMA },
3963 { "CRD-8482B", NULL, ATA_HORKAGE_NODMA },
3964 { "CRD-84", NULL, ATA_HORKAGE_NODMA },
3965 { "SanDisk SDP3B", NULL, ATA_HORKAGE_NODMA },
3966 { "SanDisk SDP3B-64", NULL, ATA_HORKAGE_NODMA },
3967 { "SANYO CD-ROM CRD", NULL, ATA_HORKAGE_NODMA },
3968 { "HITACHI CDR-8", NULL, ATA_HORKAGE_NODMA },
3969 { "HITACHI CDR-8335", NULL, ATA_HORKAGE_NODMA },
3970 { "HITACHI CDR-8435", NULL, ATA_HORKAGE_NODMA },
3971 { "Toshiba CD-ROM XM-6202B", NULL, ATA_HORKAGE_NODMA },
3972 { "TOSHIBA CD-ROM XM-1702BC", NULL, ATA_HORKAGE_NODMA },
3973 { "CD-532E-A", NULL, ATA_HORKAGE_NODMA },
3974 { "E-IDE CD-ROM CR-840",NULL, ATA_HORKAGE_NODMA },
3975 { "CD-ROM Drive/F5A", NULL, ATA_HORKAGE_NODMA },
3976 { "WPI CDD-820", NULL, ATA_HORKAGE_NODMA },
3977 { "SAMSUNG CD-ROM SC-148C", NULL, ATA_HORKAGE_NODMA },
3978 { "SAMSUNG CD-ROM SC", NULL, ATA_HORKAGE_NODMA },
3979 { "ATAPI CD-ROM DRIVE 40X MAXIMUM",NULL,ATA_HORKAGE_NODMA },
3980 { "_NEC DV5800A", NULL, ATA_HORKAGE_NODMA },
3981 { "SAMSUNG CD-ROM SN-124", "N001", ATA_HORKAGE_NODMA },
3982 { "Seagate STT20000A", NULL, ATA_HORKAGE_NODMA },
3983 /* Odd clown on sil3726/4726 PMPs */
3984 { "Config Disk", NULL, ATA_HORKAGE_DISABLE },
3986 /* Weird ATAPI devices */
3987 { "TORiSAN DVD-ROM DRD-N216", NULL, ATA_HORKAGE_MAX_SEC_128 },
3989 /* Devices we expect to fail diagnostics */
3991 /* Devices where NCQ should be avoided */
3993 { "WDC WD740ADFD-00", NULL, ATA_HORKAGE_NONCQ },
3994 { "WDC WD740ADFD-00NLR1", NULL, ATA_HORKAGE_NONCQ, },
3995 /* http://thread.gmane.org/gmane.linux.ide/14907 */
3996 { "FUJITSU MHT2060BH", NULL, ATA_HORKAGE_NONCQ },
3998 { "Maxtor *", "BANC*", ATA_HORKAGE_NONCQ },
3999 { "Maxtor 7V300F0", "VA111630", ATA_HORKAGE_NONCQ },
4000 { "ST380817AS", "3.42", ATA_HORKAGE_NONCQ },
4001 { "ST3160023AS", "3.42", ATA_HORKAGE_NONCQ },
4003 /* Blacklist entries taken from Silicon Image 3124/3132
4004 Windows driver .inf file - also several Linux problem reports */
4005 { "HTS541060G9SA00", "MB3OC60D", ATA_HORKAGE_NONCQ, },
4006 { "HTS541080G9SA00", "MB4OC60D", ATA_HORKAGE_NONCQ, },
4007 { "HTS541010G9SA00", "MBZOC60D", ATA_HORKAGE_NONCQ, },
4009 /* devices which puke on READ_NATIVE_MAX */
4010 { "HDS724040KLSA80", "KFAOA20N", ATA_HORKAGE_BROKEN_HPA, },
4011 { "WDC WD3200JD-00KLB0", "WD-WCAMR1130137", ATA_HORKAGE_BROKEN_HPA },
4012 { "WDC WD2500JD-00HBB0", "WD-WMAL71490727", ATA_HORKAGE_BROKEN_HPA },
4013 { "MAXTOR 6L080L4", "A93.0500", ATA_HORKAGE_BROKEN_HPA },
4015 /* Devices which report 1 sector over size HPA */
4016 { "ST340823A", NULL, ATA_HORKAGE_HPA_SIZE, },
4017 { "ST320413A", NULL, ATA_HORKAGE_HPA_SIZE, },
4018 { "ST310211A", NULL, ATA_HORKAGE_HPA_SIZE, },
4020 /* Devices which get the IVB wrong */
4021 { "QUANTUM FIREBALLlct10 05", "A03.0900", ATA_HORKAGE_IVB, },
4022 /* Maybe we should just blacklist TSSTcorp... */
4023 { "TSSTcorp CDDVDW SH-S202H", "SB00", ATA_HORKAGE_IVB, },
4024 { "TSSTcorp CDDVDW SH-S202H", "SB01", ATA_HORKAGE_IVB, },
4025 { "TSSTcorp CDDVDW SH-S202J", "SB00", ATA_HORKAGE_IVB, },
4026 { "TSSTcorp CDDVDW SH-S202J", "SB01", ATA_HORKAGE_IVB, },
4027 { "TSSTcorp CDDVDW SH-S202N", "SB00", ATA_HORKAGE_IVB, },
4028 { "TSSTcorp CDDVDW SH-S202N", "SB01", ATA_HORKAGE_IVB, },
4034 static int strn_pattern_cmp(const char *patt, const char *name, int wildchar)
4040 * check for trailing wildcard: *\0
4042 p = strchr(patt, wildchar);
4043 if (p && ((*(p + 1)) == 0))
4054 return strncmp(patt, name, len);
4057 static unsigned long ata_dev_blacklisted(const struct ata_device *dev)
4059 unsigned char model_num[ATA_ID_PROD_LEN + 1];
4060 unsigned char model_rev[ATA_ID_FW_REV_LEN + 1];
4061 const struct ata_blacklist_entry *ad = ata_device_blacklist;
4063 ata_id_c_string(dev->id, model_num, ATA_ID_PROD, sizeof(model_num));
4064 ata_id_c_string(dev->id, model_rev, ATA_ID_FW_REV, sizeof(model_rev));
4066 while (ad->model_num) {
4067 if (!strn_pattern_cmp(ad->model_num, model_num, '*')) {
4068 if (ad->model_rev == NULL)
4070 if (!strn_pattern_cmp(ad->model_rev, model_rev, '*'))
4078 static int ata_dma_blacklisted(const struct ata_device *dev)
4080 /* We don't support polling DMA.
4081 * DMA blacklist those ATAPI devices with CDB-intr (and use PIO)
4082 * if the LLDD handles only interrupts in the HSM_ST_LAST state.
4084 if ((dev->link->ap->flags & ATA_FLAG_PIO_POLLING) &&
4085 (dev->flags & ATA_DFLAG_CDB_INTR))
4087 return (dev->horkage & ATA_HORKAGE_NODMA) ? 1 : 0;
4091 * ata_is_40wire - check drive side detection
4094 * Perform drive side detection decoding, allowing for device vendors
4095 * who can't follow the documentation.
4098 static int ata_is_40wire(struct ata_device *dev)
4100 if (dev->horkage & ATA_HORKAGE_IVB)
4101 return ata_drive_40wire_relaxed(dev->id);
4102 return ata_drive_40wire(dev->id);
4106 * cable_is_40wire - 40/80/SATA decider
4107 * @ap: port to consider
4109 * This function encapsulates the policy for speed management
4110 * in one place. At the moment we don't cache the result but
4111 * there is a good case for setting ap->cbl to the result when
4112 * we are called with unknown cables (and figuring out if it
4113 * impacts hotplug at all).
4115 * Return 1 if the cable appears to be 40 wire.
4118 static int cable_is_40wire(struct ata_port *ap)
4120 struct ata_link *link;
4121 struct ata_device *dev;
4123 /* If the controller thinks we are 40 wire, we are */
4124 if (ap->cbl == ATA_CBL_PATA40)
4126 /* If the controller thinks we are 80 wire, we are */
4127 if (ap->cbl == ATA_CBL_PATA80 || ap->cbl == ATA_CBL_SATA)
4129 /* If the system is known to be 40 wire short cable (eg laptop),
4130 then we allow 80 wire modes even if the drive isn't sure */
4131 if (ap->cbl == ATA_CBL_PATA40_SHORT)
4133 /* If the controller doesn't know we scan
4135 - Note: We look for all 40 wire detects at this point.
4136 Any 80 wire detect is taken to be 80 wire cable
4138 - In many setups only the one drive (slave if present)
4139 will give a valid detect
4140 - If you have a non detect capable drive you don't
4141 want it to colour the choice
4143 ata_port_for_each_link(link, ap) {
4144 ata_link_for_each_dev(dev, link) {
4145 if (!ata_is_40wire(dev))
4153 * ata_dev_xfermask - Compute supported xfermask of the given device
4154 * @dev: Device to compute xfermask for
4156 * Compute supported xfermask of @dev and store it in
4157 * dev->*_mask. This function is responsible for applying all
4158 * known limits including host controller limits, device
4164 static void ata_dev_xfermask(struct ata_device *dev)
4166 struct ata_link *link = dev->link;
4167 struct ata_port *ap = link->ap;
4168 struct ata_host *host = ap->host;
4169 unsigned long xfer_mask;
4171 /* controller modes available */
4172 xfer_mask = ata_pack_xfermask(ap->pio_mask,
4173 ap->mwdma_mask, ap->udma_mask);
4175 /* drive modes available */
4176 xfer_mask &= ata_pack_xfermask(dev->pio_mask,
4177 dev->mwdma_mask, dev->udma_mask);
4178 xfer_mask &= ata_id_xfermask(dev->id);
4181 * CFA Advanced TrueIDE timings are not allowed on a shared
4184 if (ata_dev_pair(dev)) {
4185 /* No PIO5 or PIO6 */
4186 xfer_mask &= ~(0x03 << (ATA_SHIFT_PIO + 5));
4187 /* No MWDMA3 or MWDMA 4 */
4188 xfer_mask &= ~(0x03 << (ATA_SHIFT_MWDMA + 3));
4191 if (ata_dma_blacklisted(dev)) {
4192 xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA);
4193 ata_dev_printk(dev, KERN_WARNING,
4194 "device is on DMA blacklist, disabling DMA\n");
4197 if ((host->flags & ATA_HOST_SIMPLEX) &&
4198 host->simplex_claimed && host->simplex_claimed != ap) {
4199 xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA);
4200 ata_dev_printk(dev, KERN_WARNING, "simplex DMA is claimed by "
4201 "other device, disabling DMA\n");
4204 if (ap->flags & ATA_FLAG_NO_IORDY)
4205 xfer_mask &= ata_pio_mask_no_iordy(dev);
4207 if (ap->ops->mode_filter)
4208 xfer_mask = ap->ops->mode_filter(dev, xfer_mask);
4210 /* Apply cable rule here. Don't apply it early because when
4211 * we handle hot plug the cable type can itself change.
4212 * Check this last so that we know if the transfer rate was
4213 * solely limited by the cable.
4214 * Unknown or 80 wire cables reported host side are checked
4215 * drive side as well. Cases where we know a 40wire cable
4216 * is used safely for 80 are not checked here.
4218 if (xfer_mask & (0xF8 << ATA_SHIFT_UDMA))
4219 /* UDMA/44 or higher would be available */
4220 if (cable_is_40wire(ap)) {
4221 ata_dev_printk(dev, KERN_WARNING,
4222 "limited to UDMA/33 due to 40-wire cable\n");
4223 xfer_mask &= ~(0xF8 << ATA_SHIFT_UDMA);
4226 ata_unpack_xfermask(xfer_mask, &dev->pio_mask,
4227 &dev->mwdma_mask, &dev->udma_mask);
4231 * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command
4232 * @dev: Device to which command will be sent
4234 * Issue SET FEATURES - XFER MODE command to device @dev
4238 * PCI/etc. bus probe sem.
4241 * 0 on success, AC_ERR_* mask otherwise.
4244 static unsigned int ata_dev_set_xfermode(struct ata_device *dev)
4246 struct ata_taskfile tf;
4247 unsigned int err_mask;
4249 /* set up set-features taskfile */
4250 DPRINTK("set features - xfer mode\n");
4252 /* Some controllers and ATAPI devices show flaky interrupt
4253 * behavior after setting xfer mode. Use polling instead.
4255 ata_tf_init(dev, &tf);
4256 tf.command = ATA_CMD_SET_FEATURES;
4257 tf.feature = SETFEATURES_XFER;
4258 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_POLLING;
4259 tf.protocol = ATA_PROT_NODATA;
4260 /* If we are using IORDY we must send the mode setting command */
4261 if (ata_pio_need_iordy(dev))
4262 tf.nsect = dev->xfer_mode;
4263 /* If the device has IORDY and the controller does not - turn it off */
4264 else if (ata_id_has_iordy(dev->id))
4266 else /* In the ancient relic department - skip all of this */
4269 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
4271 DPRINTK("EXIT, err_mask=%x\n", err_mask);
4275 * ata_dev_set_feature - Issue SET FEATURES - SATA FEATURES
4276 * @dev: Device to which command will be sent
4277 * @enable: Whether to enable or disable the feature
4278 * @feature: The sector count represents the feature to set
4280 * Issue SET FEATURES - SATA FEATURES command to device @dev
4281 * on port @ap with sector count
4284 * PCI/etc. bus probe sem.
4287 * 0 on success, AC_ERR_* mask otherwise.
4289 static unsigned int ata_dev_set_feature(struct ata_device *dev, u8 enable,
4292 struct ata_taskfile tf;
4293 unsigned int err_mask;
4295 /* set up set-features taskfile */
4296 DPRINTK("set features - SATA features\n");
4298 ata_tf_init(dev, &tf);
4299 tf.command = ATA_CMD_SET_FEATURES;
4300 tf.feature = enable;
4301 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
4302 tf.protocol = ATA_PROT_NODATA;
4305 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
4307 DPRINTK("EXIT, err_mask=%x\n", err_mask);
4312 * ata_dev_init_params - Issue INIT DEV PARAMS command
4313 * @dev: Device to which command will be sent
4314 * @heads: Number of heads (taskfile parameter)
4315 * @sectors: Number of sectors (taskfile parameter)
4318 * Kernel thread context (may sleep)
4321 * 0 on success, AC_ERR_* mask otherwise.
4323 static unsigned int ata_dev_init_params(struct ata_device *dev,
4324 u16 heads, u16 sectors)
4326 struct ata_taskfile tf;
4327 unsigned int err_mask;
4329 /* Number of sectors per track 1-255. Number of heads 1-16 */
4330 if (sectors < 1 || sectors > 255 || heads < 1 || heads > 16)
4331 return AC_ERR_INVALID;
4333 /* set up init dev params taskfile */
4334 DPRINTK("init dev params \n");
4336 ata_tf_init(dev, &tf);
4337 tf.command = ATA_CMD_INIT_DEV_PARAMS;
4338 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
4339 tf.protocol = ATA_PROT_NODATA;
4341 tf.device |= (heads - 1) & 0x0f; /* max head = num. of heads - 1 */
4343 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
4344 /* A clean abort indicates an original or just out of spec drive
4345 and we should continue as we issue the setup based on the
4346 drive reported working geometry */
4347 if (err_mask == AC_ERR_DEV && (tf.feature & ATA_ABORTED))
4350 DPRINTK("EXIT, err_mask=%x\n", err_mask);
4355 * ata_sg_clean - Unmap DMA memory associated with command
4356 * @qc: Command containing DMA memory to be released
4358 * Unmap all mapped DMA memory associated with this command.
4361 * spin_lock_irqsave(host lock)
4363 void ata_sg_clean(struct ata_queued_cmd *qc)
4365 struct ata_port *ap = qc->ap;
4366 struct scatterlist *sg = qc->sg;
4367 int dir = qc->dma_dir;
4369 WARN_ON(sg == NULL);
4371 VPRINTK("unmapping %u sg elements\n", qc->n_elem);
4374 dma_unmap_sg(ap->dev, sg, qc->n_elem, dir);
4376 qc->flags &= ~ATA_QCFLAG_DMAMAP;
4381 * atapi_check_dma - Check whether ATAPI DMA can be supported
4382 * @qc: Metadata associated with taskfile to check
4384 * Allow low-level driver to filter ATA PACKET commands, returning
4385 * a status indicating whether or not it is OK to use DMA for the
4386 * supplied PACKET command.
4389 * spin_lock_irqsave(host lock)
4391 * RETURNS: 0 when ATAPI DMA can be used
4394 int atapi_check_dma(struct ata_queued_cmd *qc)
4396 struct ata_port *ap = qc->ap;
4398 /* Don't allow DMA if it isn't multiple of 16 bytes. Quite a
4399 * few ATAPI devices choke on such DMA requests.
4401 if (unlikely(qc->nbytes & 15))
4404 if (ap->ops->check_atapi_dma)
4405 return ap->ops->check_atapi_dma(qc);
4411 * ata_std_qc_defer - Check whether a qc needs to be deferred
4412 * @qc: ATA command in question
4414 * Non-NCQ commands cannot run with any other command, NCQ or
4415 * not. As upper layer only knows the queue depth, we are
4416 * responsible for maintaining exclusion. This function checks
4417 * whether a new command @qc can be issued.
4420 * spin_lock_irqsave(host lock)
4423 * ATA_DEFER_* if deferring is needed, 0 otherwise.
4425 int ata_std_qc_defer(struct ata_queued_cmd *qc)
4427 struct ata_link *link = qc->dev->link;
4429 if (qc->tf.protocol == ATA_PROT_NCQ) {
4430 if (!ata_tag_valid(link->active_tag))
4433 if (!ata_tag_valid(link->active_tag) && !link->sactive)
4437 return ATA_DEFER_LINK;
4440 void ata_noop_qc_prep(struct ata_queued_cmd *qc) { }
4443 * ata_sg_init - Associate command with scatter-gather table.
4444 * @qc: Command to be associated
4445 * @sg: Scatter-gather table.
4446 * @n_elem: Number of elements in s/g table.
4448 * Initialize the data-related elements of queued_cmd @qc
4449 * to point to a scatter-gather table @sg, containing @n_elem
4453 * spin_lock_irqsave(host lock)
4455 void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
4456 unsigned int n_elem)
4459 qc->n_elem = n_elem;
4464 * ata_sg_setup - DMA-map the scatter-gather table associated with a command.
4465 * @qc: Command with scatter-gather table to be mapped.
4467 * DMA-map the scatter-gather table associated with queued_cmd @qc.
4470 * spin_lock_irqsave(host lock)
4473 * Zero on success, negative on error.
4476 static int ata_sg_setup(struct ata_queued_cmd *qc)
4478 struct ata_port *ap = qc->ap;
4479 unsigned int n_elem;
4481 VPRINTK("ENTER, ata%u\n", ap->print_id);
4483 n_elem = dma_map_sg(ap->dev, qc->sg, qc->n_elem, qc->dma_dir);
4487 DPRINTK("%d sg elements mapped\n", n_elem);
4489 qc->n_elem = n_elem;
4490 qc->flags |= ATA_QCFLAG_DMAMAP;
4496 * swap_buf_le16 - swap halves of 16-bit words in place
4497 * @buf: Buffer to swap
4498 * @buf_words: Number of 16-bit words in buffer.
4500 * Swap halves of 16-bit words if needed to convert from
4501 * little-endian byte order to native cpu byte order, or
4505 * Inherited from caller.
4507 void swap_buf_le16(u16 *buf, unsigned int buf_words)
4512 for (i = 0; i < buf_words; i++)
4513 buf[i] = le16_to_cpu(buf[i]);
4514 #endif /* __BIG_ENDIAN */
4518 * ata_qc_new - Request an available ATA command, for queueing
4519 * @ap: Port associated with device @dev
4520 * @dev: Device from whom we request an available command structure
4526 static struct ata_queued_cmd *ata_qc_new(struct ata_port *ap)
4528 struct ata_queued_cmd *qc = NULL;
4531 /* no command while frozen */
4532 if (unlikely(ap->pflags & ATA_PFLAG_FROZEN))
4535 /* the last tag is reserved for internal command. */
4536 for (i = 0; i < ATA_MAX_QUEUE - 1; i++)
4537 if (!test_and_set_bit(i, &ap->qc_allocated)) {
4538 qc = __ata_qc_from_tag(ap, i);
4549 * ata_qc_new_init - Request an available ATA command, and initialize it
4550 * @dev: Device from whom we request an available command structure
4556 struct ata_queued_cmd *ata_qc_new_init(struct ata_device *dev)
4558 struct ata_port *ap = dev->link->ap;
4559 struct ata_queued_cmd *qc;
4561 qc = ata_qc_new(ap);
4574 * ata_qc_free - free unused ata_queued_cmd
4575 * @qc: Command to complete
4577 * Designed to free unused ata_queued_cmd object
4578 * in case something prevents using it.
4581 * spin_lock_irqsave(host lock)
4583 void ata_qc_free(struct ata_queued_cmd *qc)
4585 struct ata_port *ap = qc->ap;
4588 WARN_ON(qc == NULL); /* ata_qc_from_tag _might_ return NULL */
4592 if (likely(ata_tag_valid(tag))) {
4593 qc->tag = ATA_TAG_POISON;
4594 clear_bit(tag, &ap->qc_allocated);
4598 void __ata_qc_complete(struct ata_queued_cmd *qc)
4600 struct ata_port *ap = qc->ap;
4601 struct ata_link *link = qc->dev->link;
4603 WARN_ON(qc == NULL); /* ata_qc_from_tag _might_ return NULL */
4604 WARN_ON(!(qc->flags & ATA_QCFLAG_ACTIVE));
4606 if (likely(qc->flags & ATA_QCFLAG_DMAMAP))
4609 /* command should be marked inactive atomically with qc completion */
4610 if (qc->tf.protocol == ATA_PROT_NCQ) {
4611 link->sactive &= ~(1 << qc->tag);
4613 ap->nr_active_links--;
4615 link->active_tag = ATA_TAG_POISON;
4616 ap->nr_active_links--;
4619 /* clear exclusive status */
4620 if (unlikely(qc->flags & ATA_QCFLAG_CLEAR_EXCL &&
4621 ap->excl_link == link))
4622 ap->excl_link = NULL;
4624 /* atapi: mark qc as inactive to prevent the interrupt handler
4625 * from completing the command twice later, before the error handler
4626 * is called. (when rc != 0 and atapi request sense is needed)
4628 qc->flags &= ~ATA_QCFLAG_ACTIVE;
4629 ap->qc_active &= ~(1 << qc->tag);
4631 /* call completion callback */
4632 qc->complete_fn(qc);
4635 static void fill_result_tf(struct ata_queued_cmd *qc)
4637 struct ata_port *ap = qc->ap;
4639 qc->result_tf.flags = qc->tf.flags;
4640 ap->ops->qc_fill_rtf(qc);
4643 static void ata_verify_xfer(struct ata_queued_cmd *qc)
4645 struct ata_device *dev = qc->dev;
4647 if (ata_tag_internal(qc->tag))
4650 if (ata_is_nodata(qc->tf.protocol))
4653 if ((dev->mwdma_mask || dev->udma_mask) && ata_is_pio(qc->tf.protocol))
4656 dev->flags &= ~ATA_DFLAG_DUBIOUS_XFER;
4660 * ata_qc_complete - Complete an active ATA command
4661 * @qc: Command to complete
4662 * @err_mask: ATA Status register contents
4664 * Indicate to the mid and upper layers that an ATA
4665 * command has completed, with either an ok or not-ok status.
4668 * spin_lock_irqsave(host lock)
4670 void ata_qc_complete(struct ata_queued_cmd *qc)
4672 struct ata_port *ap = qc->ap;
4674 /* XXX: New EH and old EH use different mechanisms to
4675 * synchronize EH with regular execution path.
4677 * In new EH, a failed qc is marked with ATA_QCFLAG_FAILED.
4678 * Normal execution path is responsible for not accessing a
4679 * failed qc. libata core enforces the rule by returning NULL
4680 * from ata_qc_from_tag() for failed qcs.
4682 * Old EH depends on ata_qc_complete() nullifying completion
4683 * requests if ATA_QCFLAG_EH_SCHEDULED is set. Old EH does
4684 * not synchronize with interrupt handler. Only PIO task is
4687 if (ap->ops->error_handler) {
4688 struct ata_device *dev = qc->dev;
4689 struct ata_eh_info *ehi = &dev->link->eh_info;
4691 WARN_ON(ap->pflags & ATA_PFLAG_FROZEN);
4693 if (unlikely(qc->err_mask))
4694 qc->flags |= ATA_QCFLAG_FAILED;
4696 if (unlikely(qc->flags & ATA_QCFLAG_FAILED)) {
4697 if (!ata_tag_internal(qc->tag)) {
4698 /* always fill result TF for failed qc */
4700 ata_qc_schedule_eh(qc);
4705 /* read result TF if requested */
4706 if (qc->flags & ATA_QCFLAG_RESULT_TF)
4709 /* Some commands need post-processing after successful
4712 switch (qc->tf.command) {
4713 case ATA_CMD_SET_FEATURES:
4714 if (qc->tf.feature != SETFEATURES_WC_ON &&
4715 qc->tf.feature != SETFEATURES_WC_OFF)
4718 case ATA_CMD_INIT_DEV_PARAMS: /* CHS translation changed */
4719 case ATA_CMD_SET_MULTI: /* multi_count changed */
4720 /* revalidate device */
4721 ehi->dev_action[dev->devno] |= ATA_EH_REVALIDATE;
4722 ata_port_schedule_eh(ap);
4726 dev->flags |= ATA_DFLAG_SLEEPING;
4730 if (unlikely(dev->flags & ATA_DFLAG_DUBIOUS_XFER))
4731 ata_verify_xfer(qc);
4733 __ata_qc_complete(qc);
4735 if (qc->flags & ATA_QCFLAG_EH_SCHEDULED)
4738 /* read result TF if failed or requested */
4739 if (qc->err_mask || qc->flags & ATA_QCFLAG_RESULT_TF)
4742 __ata_qc_complete(qc);
4747 * ata_qc_complete_multiple - Complete multiple qcs successfully
4748 * @ap: port in question
4749 * @qc_active: new qc_active mask
4751 * Complete in-flight commands. This functions is meant to be
4752 * called from low-level driver's interrupt routine to complete
4753 * requests normally. ap->qc_active and @qc_active is compared
4754 * and commands are completed accordingly.
4757 * spin_lock_irqsave(host lock)
4760 * Number of completed commands on success, -errno otherwise.
4762 int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active)
4768 done_mask = ap->qc_active ^ qc_active;
4770 if (unlikely(done_mask & qc_active)) {
4771 ata_port_printk(ap, KERN_ERR, "illegal qc_active transition "
4772 "(%08x->%08x)\n", ap->qc_active, qc_active);
4776 for (i = 0; i < ATA_MAX_QUEUE; i++) {
4777 struct ata_queued_cmd *qc;
4779 if (!(done_mask & (1 << i)))
4782 if ((qc = ata_qc_from_tag(ap, i))) {
4783 ata_qc_complete(qc);
4792 * ata_qc_issue - issue taskfile to device
4793 * @qc: command to issue to device
4795 * Prepare an ATA command to submission to device.
4796 * This includes mapping the data into a DMA-able
4797 * area, filling in the S/G table, and finally
4798 * writing the taskfile to hardware, starting the command.
4801 * spin_lock_irqsave(host lock)
4803 void ata_qc_issue(struct ata_queued_cmd *qc)
4805 struct ata_port *ap = qc->ap;
4806 struct ata_link *link = qc->dev->link;
4807 u8 prot = qc->tf.protocol;
4809 /* Make sure only one non-NCQ command is outstanding. The
4810 * check is skipped for old EH because it reuses active qc to
4811 * request ATAPI sense.
4813 WARN_ON(ap->ops->error_handler && ata_tag_valid(link->active_tag));
4815 if (ata_is_ncq(prot)) {
4816 WARN_ON(link->sactive & (1 << qc->tag));
4819 ap->nr_active_links++;
4820 link->sactive |= 1 << qc->tag;
4822 WARN_ON(link->sactive);
4824 ap->nr_active_links++;
4825 link->active_tag = qc->tag;
4828 qc->flags |= ATA_QCFLAG_ACTIVE;
4829 ap->qc_active |= 1 << qc->tag;
4831 /* We guarantee to LLDs that they will have at least one
4832 * non-zero sg if the command is a data command.
4834 BUG_ON(ata_is_data(prot) && (!qc->sg || !qc->n_elem || !qc->nbytes));
4836 if (ata_is_dma(prot) || (ata_is_pio(prot) &&
4837 (ap->flags & ATA_FLAG_PIO_DMA)))
4838 if (ata_sg_setup(qc))
4841 /* if device is sleeping, schedule reset and abort the link */
4842 if (unlikely(qc->dev->flags & ATA_DFLAG_SLEEPING)) {
4843 link->eh_info.action |= ATA_EH_RESET;
4844 ata_ehi_push_desc(&link->eh_info, "waking up from sleep");
4845 ata_link_abort(link);
4849 ap->ops->qc_prep(qc);
4851 qc->err_mask |= ap->ops->qc_issue(qc);
4852 if (unlikely(qc->err_mask))
4857 qc->err_mask |= AC_ERR_SYSTEM;
4859 ata_qc_complete(qc);
4863 * sata_scr_valid - test whether SCRs are accessible
4864 * @link: ATA link to test SCR accessibility for
4866 * Test whether SCRs are accessible for @link.
4872 * 1 if SCRs are accessible, 0 otherwise.
4874 int sata_scr_valid(struct ata_link *link)
4876 struct ata_port *ap = link->ap;
4878 return (ap->flags & ATA_FLAG_SATA) && ap->ops->scr_read;
4882 * sata_scr_read - read SCR register of the specified port
4883 * @link: ATA link to read SCR for
4885 * @val: Place to store read value
4887 * Read SCR register @reg of @link into *@val. This function is
4888 * guaranteed to succeed if @link is ap->link, the cable type of
4889 * the port is SATA and the port implements ->scr_read.
4892 * None if @link is ap->link. Kernel thread context otherwise.
4895 * 0 on success, negative errno on failure.
4897 int sata_scr_read(struct ata_link *link, int reg, u32 *val)
4899 if (ata_is_host_link(link)) {
4900 if (sata_scr_valid(link))
4901 return link->ap->ops->scr_read(link, reg, val);
4905 return sata_pmp_scr_read(link, reg, val);
4909 * sata_scr_write - write SCR register of the specified port
4910 * @link: ATA link to write SCR for
4911 * @reg: SCR to write
4912 * @val: value to write
4914 * Write @val to SCR register @reg of @link. This function is
4915 * guaranteed to succeed if @link is ap->link, the cable type of
4916 * the port is SATA and the port implements ->scr_read.
4919 * None if @link is ap->link. Kernel thread context otherwise.
4922 * 0 on success, negative errno on failure.
4924 int sata_scr_write(struct ata_link *link, int reg, u32 val)
4926 if (ata_is_host_link(link)) {
4927 if (sata_scr_valid(link))
4928 return link->ap->ops->scr_write(link, reg, val);
4932 return sata_pmp_scr_write(link, reg, val);
4936 * sata_scr_write_flush - write SCR register of the specified port and flush
4937 * @link: ATA link to write SCR for
4938 * @reg: SCR to write
4939 * @val: value to write
4941 * This function is identical to sata_scr_write() except that this
4942 * function performs flush after writing to the register.
4945 * None if @link is ap->link. Kernel thread context otherwise.
4948 * 0 on success, negative errno on failure.
4950 int sata_scr_write_flush(struct ata_link *link, int reg, u32 val)
4952 if (ata_is_host_link(link)) {
4955 if (sata_scr_valid(link)) {
4956 rc = link->ap->ops->scr_write(link, reg, val);
4958 rc = link->ap->ops->scr_read(link, reg, &val);
4964 return sata_pmp_scr_write(link, reg, val);
4968 * ata_link_online - test whether the given link is online
4969 * @link: ATA link to test
4971 * Test whether @link is online. Note that this function returns
4972 * 0 if online status of @link cannot be obtained, so
4973 * ata_link_online(link) != !ata_link_offline(link).
4979 * True if the port online status is available and online.
4981 bool ata_link_online(struct ata_link *link)
4985 if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0 &&
4986 (sstatus & 0xf) == 0x3)
4992 * ata_link_offline - test whether the given link is offline
4993 * @link: ATA link to test
4995 * Test whether @link is offline. Note that this function
4996 * returns 0 if offline status of @link cannot be obtained, so
4997 * ata_link_online(link) != !ata_link_offline(link).
5003 * True if the port offline status is available and offline.
5005 bool ata_link_offline(struct ata_link *link)
5009 if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0 &&
5010 (sstatus & 0xf) != 0x3)
5016 static int ata_host_request_pm(struct ata_host *host, pm_message_t mesg,
5017 unsigned int action, unsigned int ehi_flags,
5020 unsigned long flags;
5023 for (i = 0; i < host->n_ports; i++) {
5024 struct ata_port *ap = host->ports[i];
5025 struct ata_link *link;
5027 /* Previous resume operation might still be in
5028 * progress. Wait for PM_PENDING to clear.
5030 if (ap->pflags & ATA_PFLAG_PM_PENDING) {
5031 ata_port_wait_eh(ap);
5032 WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING);
5035 /* request PM ops to EH */
5036 spin_lock_irqsave(ap->lock, flags);
5041 ap->pm_result = &rc;
5044 ap->pflags |= ATA_PFLAG_PM_PENDING;
5045 __ata_port_for_each_link(link, ap) {
5046 link->eh_info.action |= action;
5047 link->eh_info.flags |= ehi_flags;
5050 ata_port_schedule_eh(ap);
5052 spin_unlock_irqrestore(ap->lock, flags);
5054 /* wait and check result */
5056 ata_port_wait_eh(ap);
5057 WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING);
5067 * ata_host_suspend - suspend host
5068 * @host: host to suspend
5071 * Suspend @host. Actual operation is performed by EH. This
5072 * function requests EH to perform PM operations and waits for EH
5076 * Kernel thread context (may sleep).
5079 * 0 on success, -errno on failure.
5081 int ata_host_suspend(struct ata_host *host, pm_message_t mesg)
5086 * disable link pm on all ports before requesting
5089 ata_lpm_enable(host);
5091 rc = ata_host_request_pm(host, mesg, 0, ATA_EHI_QUIET, 1);
5093 host->dev->power.power_state = mesg;
5098 * ata_host_resume - resume host
5099 * @host: host to resume
5101 * Resume @host. Actual operation is performed by EH. This
5102 * function requests EH to perform PM operations and returns.
5103 * Note that all resume operations are performed parallely.
5106 * Kernel thread context (may sleep).
5108 void ata_host_resume(struct ata_host *host)
5110 ata_host_request_pm(host, PMSG_ON, ATA_EH_RESET,
5111 ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET, 0);
5112 host->dev->power.power_state = PMSG_ON;
5114 /* reenable link pm */
5115 ata_lpm_disable(host);
5120 * ata_port_start - Set port up for dma.
5121 * @ap: Port to initialize
5123 * Called just after data structures for each port are
5124 * initialized. Allocates space for PRD table.
5126 * May be used as the port_start() entry in ata_port_operations.
5129 * Inherited from caller.
5131 int ata_port_start(struct ata_port *ap)
5133 struct device *dev = ap->dev;
5135 ap->prd = dmam_alloc_coherent(dev, ATA_PRD_TBL_SZ, &ap->prd_dma,
5144 * ata_dev_init - Initialize an ata_device structure
5145 * @dev: Device structure to initialize
5147 * Initialize @dev in preparation for probing.
5150 * Inherited from caller.
5152 void ata_dev_init(struct ata_device *dev)
5154 struct ata_link *link = dev->link;
5155 struct ata_port *ap = link->ap;
5156 unsigned long flags;
5158 /* SATA spd limit is bound to the first device */
5159 link->sata_spd_limit = link->hw_sata_spd_limit;
5162 /* High bits of dev->flags are used to record warm plug
5163 * requests which occur asynchronously. Synchronize using
5166 spin_lock_irqsave(ap->lock, flags);
5167 dev->flags &= ~ATA_DFLAG_INIT_MASK;
5169 spin_unlock_irqrestore(ap->lock, flags);
5171 memset((void *)dev + ATA_DEVICE_CLEAR_OFFSET, 0,
5172 sizeof(*dev) - ATA_DEVICE_CLEAR_OFFSET);
5173 dev->pio_mask = UINT_MAX;
5174 dev->mwdma_mask = UINT_MAX;
5175 dev->udma_mask = UINT_MAX;
5179 * ata_link_init - Initialize an ata_link structure
5180 * @ap: ATA port link is attached to
5181 * @link: Link structure to initialize
5182 * @pmp: Port multiplier port number
5187 * Kernel thread context (may sleep)
5189 void ata_link_init(struct ata_port *ap, struct ata_link *link, int pmp)
5193 /* clear everything except for devices */
5194 memset(link, 0, offsetof(struct ata_link, device[0]));
5198 link->active_tag = ATA_TAG_POISON;
5199 link->hw_sata_spd_limit = UINT_MAX;
5201 /* can't use iterator, ap isn't initialized yet */
5202 for (i = 0; i < ATA_MAX_DEVICES; i++) {
5203 struct ata_device *dev = &link->device[i];
5206 dev->devno = dev - link->device;
5212 * sata_link_init_spd - Initialize link->sata_spd_limit
5213 * @link: Link to configure sata_spd_limit for
5215 * Initialize @link->[hw_]sata_spd_limit to the currently
5219 * Kernel thread context (may sleep).
5222 * 0 on success, -errno on failure.
5224 int sata_link_init_spd(struct ata_link *link)
5229 rc = sata_scr_read(link, SCR_CONTROL, &link->saved_scontrol);
5233 spd = (link->saved_scontrol >> 4) & 0xf;
5235 link->hw_sata_spd_limit &= (1 << spd) - 1;
5237 ata_force_link_limits(link);
5239 link->sata_spd_limit = link->hw_sata_spd_limit;
5245 * ata_port_alloc - allocate and initialize basic ATA port resources
5246 * @host: ATA host this allocated port belongs to
5248 * Allocate and initialize basic ATA port resources.
5251 * Allocate ATA port on success, NULL on failure.
5254 * Inherited from calling layer (may sleep).
5256 struct ata_port *ata_port_alloc(struct ata_host *host)
5258 struct ata_port *ap;
5262 ap = kzalloc(sizeof(*ap), GFP_KERNEL);
5266 ap->pflags |= ATA_PFLAG_INITIALIZING;
5267 ap->lock = &host->lock;
5268 ap->flags = ATA_FLAG_DISABLED;
5270 ap->ctl = ATA_DEVCTL_OBS;
5272 ap->dev = host->dev;
5273 ap->last_ctl = 0xFF;
5275 #if defined(ATA_VERBOSE_DEBUG)
5276 /* turn on all debugging levels */
5277 ap->msg_enable = 0x00FF;
5278 #elif defined(ATA_DEBUG)
5279 ap->msg_enable = ATA_MSG_DRV | ATA_MSG_INFO | ATA_MSG_CTL | ATA_MSG_WARN | ATA_MSG_ERR;
5281 ap->msg_enable = ATA_MSG_DRV | ATA_MSG_ERR | ATA_MSG_WARN;
5284 #ifdef CONFIG_ATA_SFF
5285 INIT_DELAYED_WORK(&ap->port_task, ata_pio_task);
5287 INIT_DELAYED_WORK(&ap->hotplug_task, ata_scsi_hotplug);
5288 INIT_WORK(&ap->scsi_rescan_task, ata_scsi_dev_rescan);
5289 INIT_LIST_HEAD(&ap->eh_done_q);
5290 init_waitqueue_head(&ap->eh_wait_q);
5291 init_timer_deferrable(&ap->fastdrain_timer);
5292 ap->fastdrain_timer.function = ata_eh_fastdrain_timerfn;
5293 ap->fastdrain_timer.data = (unsigned long)ap;
5295 ap->cbl = ATA_CBL_NONE;
5297 ata_link_init(ap, &ap->link, 0);
5300 ap->stats.unhandled_irq = 1;
5301 ap->stats.idle_irq = 1;
5306 static void ata_host_release(struct device *gendev, void *res)
5308 struct ata_host *host = dev_get_drvdata(gendev);
5311 for (i = 0; i < host->n_ports; i++) {
5312 struct ata_port *ap = host->ports[i];
5318 scsi_host_put(ap->scsi_host);
5320 kfree(ap->pmp_link);
5322 host->ports[i] = NULL;
5325 dev_set_drvdata(gendev, NULL);
5329 * ata_host_alloc - allocate and init basic ATA host resources
5330 * @dev: generic device this host is associated with
5331 * @max_ports: maximum number of ATA ports associated with this host
5333 * Allocate and initialize basic ATA host resources. LLD calls
5334 * this function to allocate a host, initializes it fully and
5335 * attaches it using ata_host_register().
5337 * @max_ports ports are allocated and host->n_ports is
5338 * initialized to @max_ports. The caller is allowed to decrease
5339 * host->n_ports before calling ata_host_register(). The unused
5340 * ports will be automatically freed on registration.
5343 * Allocate ATA host on success, NULL on failure.
5346 * Inherited from calling layer (may sleep).
5348 struct ata_host *ata_host_alloc(struct device *dev, int max_ports)
5350 struct ata_host *host;
5356 if (!devres_open_group(dev, NULL, GFP_KERNEL))
5359 /* alloc a container for our list of ATA ports (buses) */
5360 sz = sizeof(struct ata_host) + (max_ports + 1) * sizeof(void *);
5361 /* alloc a container for our list of ATA ports (buses) */
5362 host = devres_alloc(ata_host_release, sz, GFP_KERNEL);
5366 devres_add(dev, host);
5367 dev_set_drvdata(dev, host);
5369 spin_lock_init(&host->lock);
5371 host->n_ports = max_ports;
5373 /* allocate ports bound to this host */
5374 for (i = 0; i < max_ports; i++) {
5375 struct ata_port *ap;
5377 ap = ata_port_alloc(host);
5382 host->ports[i] = ap;
5385 devres_remove_group(dev, NULL);
5389 devres_release_group(dev, NULL);
5394 * ata_host_alloc_pinfo - alloc host and init with port_info array
5395 * @dev: generic device this host is associated with
5396 * @ppi: array of ATA port_info to initialize host with
5397 * @n_ports: number of ATA ports attached to this host
5399 * Allocate ATA host and initialize with info from @ppi. If NULL
5400 * terminated, @ppi may contain fewer entries than @n_ports. The
5401 * last entry will be used for the remaining ports.
5404 * Allocate ATA host on success, NULL on failure.
5407 * Inherited from calling layer (may sleep).
5409 struct ata_host *ata_host_alloc_pinfo(struct device *dev,
5410 const struct ata_port_info * const * ppi,
5413 const struct ata_port_info *pi;
5414 struct ata_host *host;
5417 host = ata_host_alloc(dev, n_ports);
5421 for (i = 0, j = 0, pi = NULL; i < host->n_ports; i++) {
5422 struct ata_port *ap = host->ports[i];
5427 ap->pio_mask = pi->pio_mask;
5428 ap->mwdma_mask = pi->mwdma_mask;
5429 ap->udma_mask = pi->udma_mask;
5430 ap->flags |= pi->flags;
5431 ap->link.flags |= pi->link_flags;
5432 ap->ops = pi->port_ops;
5434 if (!host->ops && (pi->port_ops != &ata_dummy_port_ops))
5435 host->ops = pi->port_ops;
5441 static void ata_host_stop(struct device *gendev, void *res)
5443 struct ata_host *host = dev_get_drvdata(gendev);
5446 WARN_ON(!(host->flags & ATA_HOST_STARTED));
5448 for (i = 0; i < host->n_ports; i++) {
5449 struct ata_port *ap = host->ports[i];
5451 if (ap->ops->port_stop)
5452 ap->ops->port_stop(ap);
5455 if (host->ops->host_stop)
5456 host->ops->host_stop(host);
5460 * ata_finalize_port_ops - finalize ata_port_operations
5461 * @ops: ata_port_operations to finalize
5463 * An ata_port_operations can inherit from another ops and that
5464 * ops can again inherit from another. This can go on as many
5465 * times as necessary as long as there is no loop in the
5466 * inheritance chain.
5468 * Ops tables are finalized when the host is started. NULL or
5469 * unspecified entries are inherited from the closet ancestor
5470 * which has the method and the entry is populated with it.
5471 * After finalization, the ops table directly points to all the
5472 * methods and ->inherits is no longer necessary and cleared.
5474 * Using ATA_OP_NULL, inheriting ops can force a method to NULL.
5479 static void ata_finalize_port_ops(struct ata_port_operations *ops)
5481 static DEFINE_SPINLOCK(lock);
5482 const struct ata_port_operations *cur;
5483 void **begin = (void **)ops;
5484 void **end = (void **)&ops->inherits;
5487 if (!ops || !ops->inherits)
5492 for (cur = ops->inherits; cur; cur = cur->inherits) {
5493 void **inherit = (void **)cur;
5495 for (pp = begin; pp < end; pp++, inherit++)
5500 for (pp = begin; pp < end; pp++)
5504 ops->inherits = NULL;
5510 * ata_host_start - start and freeze ports of an ATA host
5511 * @host: ATA host to start ports for
5513 * Start and then freeze ports of @host. Started status is
5514 * recorded in host->flags, so this function can be called
5515 * multiple times. Ports are guaranteed to get started only
5516 * once. If host->ops isn't initialized yet, its set to the
5517 * first non-dummy port ops.
5520 * Inherited from calling layer (may sleep).
5523 * 0 if all ports are started successfully, -errno otherwise.
5525 int ata_host_start(struct ata_host *host)
5528 void *start_dr = NULL;
5531 if (host->flags & ATA_HOST_STARTED)
5534 ata_finalize_port_ops(host->ops);
5536 for (i = 0; i < host->n_ports; i++) {
5537 struct ata_port *ap = host->ports[i];
5539 ata_finalize_port_ops(ap->ops);
5541 if (!host->ops && !ata_port_is_dummy(ap))
5542 host->ops = ap->ops;
5544 if (ap->ops->port_stop)
5548 if (host->ops->host_stop)
5552 start_dr = devres_alloc(ata_host_stop, 0, GFP_KERNEL);
5557 for (i = 0; i < host->n_ports; i++) {
5558 struct ata_port *ap = host->ports[i];
5560 if (ap->ops->port_start) {
5561 rc = ap->ops->port_start(ap);
5564 dev_printk(KERN_ERR, host->dev,
5565 "failed to start port %d "
5566 "(errno=%d)\n", i, rc);
5570 ata_eh_freeze_port(ap);
5574 devres_add(host->dev, start_dr);
5575 host->flags |= ATA_HOST_STARTED;
5580 struct ata_port *ap = host->ports[i];
5582 if (ap->ops->port_stop)
5583 ap->ops->port_stop(ap);
5585 devres_free(start_dr);
5590 * ata_sas_host_init - Initialize a host struct
5591 * @host: host to initialize
5592 * @dev: device host is attached to
5593 * @flags: host flags
5597 * PCI/etc. bus probe sem.
5600 /* KILLME - the only user left is ipr */
5601 void ata_host_init(struct ata_host *host, struct device *dev,
5602 unsigned long flags, struct ata_port_operations *ops)
5604 spin_lock_init(&host->lock);
5606 host->flags = flags;
5611 * ata_host_register - register initialized ATA host
5612 * @host: ATA host to register
5613 * @sht: template for SCSI host
5615 * Register initialized ATA host. @host is allocated using
5616 * ata_host_alloc() and fully initialized by LLD. This function
5617 * starts ports, registers @host with ATA and SCSI layers and
5618 * probe registered devices.
5621 * Inherited from calling layer (may sleep).
5624 * 0 on success, -errno otherwise.
5626 int ata_host_register(struct ata_host *host, struct scsi_host_template *sht)
5630 /* host must have been started */
5631 if (!(host->flags & ATA_HOST_STARTED)) {
5632 dev_printk(KERN_ERR, host->dev,
5633 "BUG: trying to register unstarted host\n");
5638 /* Blow away unused ports. This happens when LLD can't
5639 * determine the exact number of ports to allocate at
5642 for (i = host->n_ports; host->ports[i]; i++)
5643 kfree(host->ports[i]);
5645 /* give ports names and add SCSI hosts */
5646 for (i = 0; i < host->n_ports; i++)
5647 host->ports[i]->print_id = ata_print_id++;
5649 rc = ata_scsi_add_hosts(host, sht);
5653 /* associate with ACPI nodes */
5654 ata_acpi_associate(host);
5656 /* set cable, sata_spd_limit and report */
5657 for (i = 0; i < host->n_ports; i++) {
5658 struct ata_port *ap = host->ports[i];
5659 unsigned long xfer_mask;
5661 /* set SATA cable type if still unset */
5662 if (ap->cbl == ATA_CBL_NONE && (ap->flags & ATA_FLAG_SATA))
5663 ap->cbl = ATA_CBL_SATA;
5665 /* init sata_spd_limit to the current value */
5666 sata_link_init_spd(&ap->link);
5668 /* print per-port info to dmesg */
5669 xfer_mask = ata_pack_xfermask(ap->pio_mask, ap->mwdma_mask,
5672 if (!ata_port_is_dummy(ap)) {
5673 ata_port_printk(ap, KERN_INFO,
5674 "%cATA max %s %s\n",
5675 (ap->flags & ATA_FLAG_SATA) ? 'S' : 'P',
5676 ata_mode_string(xfer_mask),
5677 ap->link.eh_info.desc);
5678 ata_ehi_clear_desc(&ap->link.eh_info);
5680 ata_port_printk(ap, KERN_INFO, "DUMMY\n");
5683 /* perform each probe synchronously */
5684 DPRINTK("probe begin\n");
5685 for (i = 0; i < host->n_ports; i++) {
5686 struct ata_port *ap = host->ports[i];
5689 if (ap->ops->error_handler) {
5690 struct ata_eh_info *ehi = &ap->link.eh_info;
5691 unsigned long flags;
5695 /* kick EH for boot probing */
5696 spin_lock_irqsave(ap->lock, flags);
5698 ehi->probe_mask |= ATA_ALL_DEVICES;
5699 ehi->action |= ATA_EH_RESET | ATA_EH_LPM;
5700 ehi->flags |= ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET;
5702 ap->pflags &= ~ATA_PFLAG_INITIALIZING;
5703 ap->pflags |= ATA_PFLAG_LOADING;
5704 ata_port_schedule_eh(ap);
5706 spin_unlock_irqrestore(ap->lock, flags);
5708 /* wait for EH to finish */
5709 ata_port_wait_eh(ap);
5711 DPRINTK("ata%u: bus probe begin\n", ap->print_id);
5712 rc = ata_bus_probe(ap);
5713 DPRINTK("ata%u: bus probe end\n", ap->print_id);
5716 /* FIXME: do something useful here?
5717 * Current libata behavior will
5718 * tear down everything when
5719 * the module is removed
5720 * or the h/w is unplugged.
5726 /* probes are done, now scan each port's disk(s) */
5727 DPRINTK("host probe begin\n");
5728 for (i = 0; i < host->n_ports; i++) {
5729 struct ata_port *ap = host->ports[i];
5731 ata_scsi_scan_host(ap, 1);
5738 * ata_host_activate - start host, request IRQ and register it
5739 * @host: target ATA host
5740 * @irq: IRQ to request
5741 * @irq_handler: irq_handler used when requesting IRQ
5742 * @irq_flags: irq_flags used when requesting IRQ
5743 * @sht: scsi_host_template to use when registering the host
5745 * After allocating an ATA host and initializing it, most libata
5746 * LLDs perform three steps to activate the host - start host,
5747 * request IRQ and register it. This helper takes necessasry
5748 * arguments and performs the three steps in one go.
5750 * An invalid IRQ skips the IRQ registration and expects the host to
5751 * have set polling mode on the port. In this case, @irq_handler
5755 * Inherited from calling layer (may sleep).
5758 * 0 on success, -errno otherwise.
5760 int ata_host_activate(struct ata_host *host, int irq,
5761 irq_handler_t irq_handler, unsigned long irq_flags,
5762 struct scsi_host_template *sht)
5766 rc = ata_host_start(host);
5770 /* Special case for polling mode */
5772 WARN_ON(irq_handler);
5773 return ata_host_register(host, sht);
5776 rc = devm_request_irq(host->dev, irq, irq_handler, irq_flags,
5777 dev_driver_string(host->dev), host);
5781 for (i = 0; i < host->n_ports; i++)
5782 ata_port_desc(host->ports[i], "irq %d", irq);
5784 rc = ata_host_register(host, sht);
5785 /* if failed, just free the IRQ and leave ports alone */
5787 devm_free_irq(host->dev, irq, host);
5793 * ata_port_detach - Detach ATA port in prepration of device removal
5794 * @ap: ATA port to be detached
5796 * Detach all ATA devices and the associated SCSI devices of @ap;
5797 * then, remove the associated SCSI host. @ap is guaranteed to
5798 * be quiescent on return from this function.
5801 * Kernel thread context (may sleep).
5803 static void ata_port_detach(struct ata_port *ap)
5805 unsigned long flags;
5806 struct ata_link *link;
5807 struct ata_device *dev;
5809 if (!ap->ops->error_handler)
5812 /* tell EH we're leaving & flush EH */
5813 spin_lock_irqsave(ap->lock, flags);
5814 ap->pflags |= ATA_PFLAG_UNLOADING;
5815 spin_unlock_irqrestore(ap->lock, flags);
5817 ata_port_wait_eh(ap);
5819 /* EH is now guaranteed to see UNLOADING - EH context belongs
5820 * to us. Restore SControl and disable all existing devices.
5822 __ata_port_for_each_link(link, ap) {
5823 sata_scr_write(link, SCR_CONTROL, link->saved_scontrol);
5824 ata_link_for_each_dev(dev, link)
5825 ata_dev_disable(dev);
5828 /* Final freeze & EH. All in-flight commands are aborted. EH
5829 * will be skipped and retrials will be terminated with bad
5832 spin_lock_irqsave(ap->lock, flags);
5833 ata_port_freeze(ap); /* won't be thawed */
5834 spin_unlock_irqrestore(ap->lock, flags);
5836 ata_port_wait_eh(ap);
5837 cancel_rearming_delayed_work(&ap->hotplug_task);
5840 /* remove the associated SCSI host */
5841 scsi_remove_host(ap->scsi_host);
5845 * ata_host_detach - Detach all ports of an ATA host
5846 * @host: Host to detach
5848 * Detach all ports of @host.
5851 * Kernel thread context (may sleep).
5853 void ata_host_detach(struct ata_host *host)
5857 for (i = 0; i < host->n_ports; i++)
5858 ata_port_detach(host->ports[i]);
5860 /* the host is dead now, dissociate ACPI */
5861 ata_acpi_dissociate(host);
5867 * ata_pci_remove_one - PCI layer callback for device removal
5868 * @pdev: PCI device that was removed
5870 * PCI layer indicates to libata via this hook that hot-unplug or
5871 * module unload event has occurred. Detach all ports. Resource
5872 * release is handled via devres.
5875 * Inherited from PCI layer (may sleep).
5877 void ata_pci_remove_one(struct pci_dev *pdev)
5879 struct device *dev = &pdev->dev;
5880 struct ata_host *host = dev_get_drvdata(dev);
5882 ata_host_detach(host);
5885 /* move to PCI subsystem */
5886 int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits)
5888 unsigned long tmp = 0;
5890 switch (bits->width) {
5893 pci_read_config_byte(pdev, bits->reg, &tmp8);
5899 pci_read_config_word(pdev, bits->reg, &tmp16);
5905 pci_read_config_dword(pdev, bits->reg, &tmp32);
5916 return (tmp == bits->val) ? 1 : 0;
5920 void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg)
5922 pci_save_state(pdev);
5923 pci_disable_device(pdev);
5925 if (mesg.event & PM_EVENT_SLEEP)
5926 pci_set_power_state(pdev, PCI_D3hot);
5929 int ata_pci_device_do_resume(struct pci_dev *pdev)
5933 pci_set_power_state(pdev, PCI_D0);
5934 pci_restore_state(pdev);
5936 rc = pcim_enable_device(pdev);
5938 dev_printk(KERN_ERR, &pdev->dev,
5939 "failed to enable device after resume (%d)\n", rc);
5943 pci_set_master(pdev);
5947 int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg)
5949 struct ata_host *host = dev_get_drvdata(&pdev->dev);
5952 rc = ata_host_suspend(host, mesg);
5956 ata_pci_device_do_suspend(pdev, mesg);
5961 int ata_pci_device_resume(struct pci_dev *pdev)
5963 struct ata_host *host = dev_get_drvdata(&pdev->dev);
5966 rc = ata_pci_device_do_resume(pdev);
5968 ata_host_resume(host);
5971 #endif /* CONFIG_PM */
5973 #endif /* CONFIG_PCI */
5975 static int __init ata_parse_force_one(char **cur,
5976 struct ata_force_ent *force_ent,
5977 const char **reason)
5979 /* FIXME: Currently, there's no way to tag init const data and
5980 * using __initdata causes build failure on some versions of
5981 * gcc. Once __initdataconst is implemented, add const to the
5982 * following structure.
5984 static struct ata_force_param force_tbl[] __initdata = {
5985 { "40c", .cbl = ATA_CBL_PATA40 },
5986 { "80c", .cbl = ATA_CBL_PATA80 },
5987 { "short40c", .cbl = ATA_CBL_PATA40_SHORT },
5988 { "unk", .cbl = ATA_CBL_PATA_UNK },
5989 { "ign", .cbl = ATA_CBL_PATA_IGN },
5990 { "sata", .cbl = ATA_CBL_SATA },
5991 { "1.5Gbps", .spd_limit = 1 },
5992 { "3.0Gbps", .spd_limit = 2 },
5993 { "noncq", .horkage_on = ATA_HORKAGE_NONCQ },
5994 { "ncq", .horkage_off = ATA_HORKAGE_NONCQ },
5995 { "pio0", .xfer_mask = 1 << (ATA_SHIFT_PIO + 0) },
5996 { "pio1", .xfer_mask = 1 << (ATA_SHIFT_PIO + 1) },
5997 { "pio2", .xfer_mask = 1 << (ATA_SHIFT_PIO + 2) },
5998 { "pio3", .xfer_mask = 1 << (ATA_SHIFT_PIO + 3) },
5999 { "pio4", .xfer_mask = 1 << (ATA_SHIFT_PIO + 4) },
6000 { "pio5", .xfer_mask = 1 << (ATA_SHIFT_PIO + 5) },
6001 { "pio6", .xfer_mask = 1 << (ATA_SHIFT_PIO + 6) },
6002 { "mwdma0", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 0) },
6003 { "mwdma1", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 1) },
6004 { "mwdma2", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 2) },
6005 { "mwdma3", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 3) },
6006 { "mwdma4", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 4) },
6007 { "udma0", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 0) },
6008 { "udma16", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 0) },
6009 { "udma/16", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 0) },
6010 { "udma1", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 1) },
6011 { "udma25", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 1) },
6012 { "udma/25", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 1) },
6013 { "udma2", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 2) },
6014 { "udma33", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 2) },
6015 { "udma/33", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 2) },
6016 { "udma3", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 3) },
6017 { "udma44", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 3) },
6018 { "udma/44", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 3) },
6019 { "udma4", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 4) },
6020 { "udma66", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 4) },
6021 { "udma/66", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 4) },
6022 { "udma5", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 5) },
6023 { "udma100", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 5) },
6024 { "udma/100", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 5) },
6025 { "udma6", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 6) },
6026 { "udma133", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 6) },
6027 { "udma/133", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 6) },
6028 { "udma7", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 7) },
6029 { "nohrst", .lflags = ATA_LFLAG_NO_HRST },
6030 { "nosrst", .lflags = ATA_LFLAG_NO_SRST },
6031 { "norst", .lflags = ATA_LFLAG_NO_HRST | ATA_LFLAG_NO_SRST },
6033 char *start = *cur, *p = *cur;
6034 char *id, *val, *endp;
6035 const struct ata_force_param *match_fp = NULL;
6036 int nr_matches = 0, i;
6038 /* find where this param ends and update *cur */
6039 while (*p != '\0' && *p != ',')
6050 p = strchr(start, ':');
6052 val = strstrip(start);
6057 id = strstrip(start);
6058 val = strstrip(p + 1);
6061 p = strchr(id, '.');
6064 force_ent->device = simple_strtoul(p, &endp, 10);
6065 if (p == endp || *endp != '\0') {
6066 *reason = "invalid device";
6071 force_ent->port = simple_strtoul(id, &endp, 10);
6072 if (p == endp || *endp != '\0') {
6073 *reason = "invalid port/link";
6078 /* parse val, allow shortcuts so that both 1.5 and 1.5Gbps work */
6079 for (i = 0; i < ARRAY_SIZE(force_tbl); i++) {
6080 const struct ata_force_param *fp = &force_tbl[i];
6082 if (strncasecmp(val, fp->name, strlen(val)))
6088 if (strcasecmp(val, fp->name) == 0) {
6095 *reason = "unknown value";
6098 if (nr_matches > 1) {
6099 *reason = "ambigious value";
6103 force_ent->param = *match_fp;
6108 static void __init ata_parse_force_param(void)
6110 int idx = 0, size = 1;
6111 int last_port = -1, last_device = -1;
6112 char *p, *cur, *next;
6114 /* calculate maximum number of params and allocate force_tbl */
6115 for (p = ata_force_param_buf; *p; p++)
6119 ata_force_tbl = kzalloc(sizeof(ata_force_tbl[0]) * size, GFP_KERNEL);
6120 if (!ata_force_tbl) {
6121 printk(KERN_WARNING "ata: failed to extend force table, "
6122 "libata.force ignored\n");
6126 /* parse and populate the table */
6127 for (cur = ata_force_param_buf; *cur != '\0'; cur = next) {
6128 const char *reason = "";
6129 struct ata_force_ent te = { .port = -1, .device = -1 };
6132 if (ata_parse_force_one(&next, &te, &reason)) {
6133 printk(KERN_WARNING "ata: failed to parse force "
6134 "parameter \"%s\" (%s)\n",
6139 if (te.port == -1) {
6140 te.port = last_port;
6141 te.device = last_device;
6144 ata_force_tbl[idx++] = te;
6146 last_port = te.port;
6147 last_device = te.device;
6150 ata_force_tbl_size = idx;
6153 static int __init ata_init(void)
6155 ata_parse_force_param();
6157 ata_wq = create_workqueue("ata");
6159 goto free_force_tbl;
6161 ata_aux_wq = create_singlethread_workqueue("ata_aux");
6165 printk(KERN_DEBUG "libata version " DRV_VERSION " loaded.\n");
6169 destroy_workqueue(ata_wq);
6171 kfree(ata_force_tbl);
6175 static void __exit ata_exit(void)
6177 kfree(ata_force_tbl);
6178 destroy_workqueue(ata_wq);
6179 destroy_workqueue(ata_aux_wq);
6182 subsys_initcall(ata_init);
6183 module_exit(ata_exit);
6185 static unsigned long ratelimit_time;
6186 static DEFINE_SPINLOCK(ata_ratelimit_lock);
6188 int ata_ratelimit(void)
6191 unsigned long flags;
6193 spin_lock_irqsave(&ata_ratelimit_lock, flags);
6195 if (time_after(jiffies, ratelimit_time)) {
6197 ratelimit_time = jiffies + (HZ/5);
6201 spin_unlock_irqrestore(&ata_ratelimit_lock, flags);
6207 * ata_wait_register - wait until register value changes
6208 * @reg: IO-mapped register
6209 * @mask: Mask to apply to read register value
6210 * @val: Wait condition
6211 * @interval: polling interval in milliseconds
6212 * @timeout: timeout in milliseconds
6214 * Waiting for some bits of register to change is a common
6215 * operation for ATA controllers. This function reads 32bit LE
6216 * IO-mapped register @reg and tests for the following condition.
6218 * (*@reg & mask) != val
6220 * If the condition is met, it returns; otherwise, the process is
6221 * repeated after @interval_msec until timeout.
6224 * Kernel thread context (may sleep)
6227 * The final register value.
6229 u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val,
6230 unsigned long interval, unsigned long timeout)
6232 unsigned long deadline;
6235 tmp = ioread32(reg);
6237 /* Calculate timeout _after_ the first read to make sure
6238 * preceding writes reach the controller before starting to
6239 * eat away the timeout.
6241 deadline = ata_deadline(jiffies, timeout);
6243 while ((tmp & mask) == val && time_before(jiffies, deadline)) {
6245 tmp = ioread32(reg);
6254 static unsigned int ata_dummy_qc_issue(struct ata_queued_cmd *qc)
6256 return AC_ERR_SYSTEM;
6259 static void ata_dummy_error_handler(struct ata_port *ap)
6264 struct ata_port_operations ata_dummy_port_ops = {
6265 .qc_prep = ata_noop_qc_prep,
6266 .qc_issue = ata_dummy_qc_issue,
6267 .error_handler = ata_dummy_error_handler,
6270 const struct ata_port_info ata_dummy_port_info = {
6271 .port_ops = &ata_dummy_port_ops,
6275 * libata is essentially a library of internal helper functions for
6276 * low-level ATA host controller drivers. As such, the API/ABI is
6277 * likely to change as new drivers are added and updated.
6278 * Do not depend on ABI/API stability.
6280 EXPORT_SYMBOL_GPL(sata_deb_timing_normal);
6281 EXPORT_SYMBOL_GPL(sata_deb_timing_hotplug);
6282 EXPORT_SYMBOL_GPL(sata_deb_timing_long);
6283 EXPORT_SYMBOL_GPL(ata_base_port_ops);
6284 EXPORT_SYMBOL_GPL(sata_port_ops);
6285 EXPORT_SYMBOL_GPL(ata_dummy_port_ops);
6286 EXPORT_SYMBOL_GPL(ata_dummy_port_info);
6287 EXPORT_SYMBOL_GPL(__ata_port_next_link);
6288 EXPORT_SYMBOL_GPL(ata_std_bios_param);
6289 EXPORT_SYMBOL_GPL(ata_host_init);
6290 EXPORT_SYMBOL_GPL(ata_host_alloc);
6291 EXPORT_SYMBOL_GPL(ata_host_alloc_pinfo);
6292 EXPORT_SYMBOL_GPL(ata_host_start);
6293 EXPORT_SYMBOL_GPL(ata_host_register);
6294 EXPORT_SYMBOL_GPL(ata_host_activate);
6295 EXPORT_SYMBOL_GPL(ata_host_detach);
6296 EXPORT_SYMBOL_GPL(ata_sg_init);
6297 EXPORT_SYMBOL_GPL(ata_qc_complete);
6298 EXPORT_SYMBOL_GPL(ata_qc_complete_multiple);
6299 EXPORT_SYMBOL_GPL(atapi_cmd_type);
6300 EXPORT_SYMBOL_GPL(ata_tf_to_fis);
6301 EXPORT_SYMBOL_GPL(ata_tf_from_fis);
6302 EXPORT_SYMBOL_GPL(ata_pack_xfermask);
6303 EXPORT_SYMBOL_GPL(ata_unpack_xfermask);
6304 EXPORT_SYMBOL_GPL(ata_xfer_mask2mode);
6305 EXPORT_SYMBOL_GPL(ata_xfer_mode2mask);
6306 EXPORT_SYMBOL_GPL(ata_xfer_mode2shift);
6307 EXPORT_SYMBOL_GPL(ata_mode_string);
6308 EXPORT_SYMBOL_GPL(ata_id_xfermask);
6309 EXPORT_SYMBOL_GPL(ata_port_start);
6310 EXPORT_SYMBOL_GPL(ata_do_set_mode);
6311 EXPORT_SYMBOL_GPL(ata_std_qc_defer);
6312 EXPORT_SYMBOL_GPL(ata_noop_qc_prep);
6313 EXPORT_SYMBOL_GPL(ata_port_probe);
6314 EXPORT_SYMBOL_GPL(ata_dev_disable);
6315 EXPORT_SYMBOL_GPL(sata_set_spd);
6316 EXPORT_SYMBOL_GPL(ata_wait_after_reset);
6317 EXPORT_SYMBOL_GPL(sata_link_debounce);
6318 EXPORT_SYMBOL_GPL(sata_link_resume);
6319 EXPORT_SYMBOL_GPL(ata_std_prereset);
6320 EXPORT_SYMBOL_GPL(sata_link_hardreset);
6321 EXPORT_SYMBOL_GPL(sata_std_hardreset);
6322 EXPORT_SYMBOL_GPL(ata_std_postreset);
6323 EXPORT_SYMBOL_GPL(ata_dev_classify);
6324 EXPORT_SYMBOL_GPL(ata_dev_pair);
6325 EXPORT_SYMBOL_GPL(ata_port_disable);
6326 EXPORT_SYMBOL_GPL(ata_ratelimit);
6327 EXPORT_SYMBOL_GPL(ata_wait_register);
6328 EXPORT_SYMBOL_GPL(ata_scsi_ioctl);
6329 EXPORT_SYMBOL_GPL(ata_scsi_queuecmd);
6330 EXPORT_SYMBOL_GPL(ata_scsi_slave_config);
6331 EXPORT_SYMBOL_GPL(ata_scsi_slave_destroy);
6332 EXPORT_SYMBOL_GPL(ata_scsi_change_queue_depth);
6333 EXPORT_SYMBOL_GPL(sata_scr_valid);
6334 EXPORT_SYMBOL_GPL(sata_scr_read);
6335 EXPORT_SYMBOL_GPL(sata_scr_write);
6336 EXPORT_SYMBOL_GPL(sata_scr_write_flush);
6337 EXPORT_SYMBOL_GPL(ata_link_online);
6338 EXPORT_SYMBOL_GPL(ata_link_offline);
6340 EXPORT_SYMBOL_GPL(ata_host_suspend);
6341 EXPORT_SYMBOL_GPL(ata_host_resume);
6342 #endif /* CONFIG_PM */
6343 EXPORT_SYMBOL_GPL(ata_id_string);
6344 EXPORT_SYMBOL_GPL(ata_id_c_string);
6345 EXPORT_SYMBOL_GPL(ata_do_dev_read_id);
6346 EXPORT_SYMBOL_GPL(ata_scsi_simulate);
6348 EXPORT_SYMBOL_GPL(ata_pio_need_iordy);
6349 EXPORT_SYMBOL_GPL(ata_timing_find_mode);
6350 EXPORT_SYMBOL_GPL(ata_timing_compute);
6351 EXPORT_SYMBOL_GPL(ata_timing_merge);
6352 EXPORT_SYMBOL_GPL(ata_timing_cycle2mode);
6355 EXPORT_SYMBOL_GPL(pci_test_config_bits);
6356 EXPORT_SYMBOL_GPL(ata_pci_remove_one);
6358 EXPORT_SYMBOL_GPL(ata_pci_device_do_suspend);
6359 EXPORT_SYMBOL_GPL(ata_pci_device_do_resume);
6360 EXPORT_SYMBOL_GPL(ata_pci_device_suspend);
6361 EXPORT_SYMBOL_GPL(ata_pci_device_resume);
6362 #endif /* CONFIG_PM */
6363 #endif /* CONFIG_PCI */
6365 EXPORT_SYMBOL_GPL(__ata_ehi_push_desc);
6366 EXPORT_SYMBOL_GPL(ata_ehi_push_desc);
6367 EXPORT_SYMBOL_GPL(ata_ehi_clear_desc);
6368 EXPORT_SYMBOL_GPL(ata_port_desc);
6370 EXPORT_SYMBOL_GPL(ata_port_pbar_desc);
6371 #endif /* CONFIG_PCI */
6372 EXPORT_SYMBOL_GPL(ata_port_schedule_eh);
6373 EXPORT_SYMBOL_GPL(ata_link_abort);
6374 EXPORT_SYMBOL_GPL(ata_port_abort);
6375 EXPORT_SYMBOL_GPL(ata_port_freeze);
6376 EXPORT_SYMBOL_GPL(sata_async_notification);
6377 EXPORT_SYMBOL_GPL(ata_eh_freeze_port);
6378 EXPORT_SYMBOL_GPL(ata_eh_thaw_port);
6379 EXPORT_SYMBOL_GPL(ata_eh_qc_complete);
6380 EXPORT_SYMBOL_GPL(ata_eh_qc_retry);
6381 EXPORT_SYMBOL_GPL(ata_eh_analyze_ncq_error);
6382 EXPORT_SYMBOL_GPL(ata_do_eh);
6383 EXPORT_SYMBOL_GPL(ata_std_error_handler);
6385 EXPORT_SYMBOL_GPL(ata_cable_40wire);
6386 EXPORT_SYMBOL_GPL(ata_cable_80wire);
6387 EXPORT_SYMBOL_GPL(ata_cable_unknown);
6388 EXPORT_SYMBOL_GPL(ata_cable_ignore);
6389 EXPORT_SYMBOL_GPL(ata_cable_sata);