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 <linux/async.h>
60 #include <scsi/scsi.h>
61 #include <scsi/scsi_cmnd.h>
62 #include <scsi/scsi_host.h>
63 #include <linux/libata.h>
64 #include <asm/byteorder.h>
65 #include <linux/cdrom.h>
70 /* debounce timing parameters in msecs { interval, duration, timeout } */
71 const unsigned long sata_deb_timing_normal[] = { 5, 100, 2000 };
72 const unsigned long sata_deb_timing_hotplug[] = { 25, 500, 2000 };
73 const unsigned long sata_deb_timing_long[] = { 100, 2000, 5000 };
75 const struct ata_port_operations ata_base_port_ops = {
76 .prereset = ata_std_prereset,
77 .postreset = ata_std_postreset,
78 .error_handler = ata_std_error_handler,
81 const struct ata_port_operations sata_port_ops = {
82 .inherits = &ata_base_port_ops,
84 .qc_defer = ata_std_qc_defer,
85 .hardreset = sata_std_hardreset,
88 static unsigned int ata_dev_init_params(struct ata_device *dev,
89 u16 heads, u16 sectors);
90 static unsigned int ata_dev_set_xfermode(struct ata_device *dev);
91 static unsigned int ata_dev_set_feature(struct ata_device *dev,
92 u8 enable, u8 feature);
93 static void ata_dev_xfermask(struct ata_device *dev);
94 static unsigned long ata_dev_blacklisted(const struct ata_device *dev);
96 unsigned int ata_print_id = 1;
97 static struct workqueue_struct *ata_wq;
99 struct workqueue_struct *ata_aux_wq;
101 struct ata_force_param {
105 unsigned long xfer_mask;
106 unsigned int horkage_on;
107 unsigned int horkage_off;
111 struct ata_force_ent {
114 struct ata_force_param param;
117 static struct ata_force_ent *ata_force_tbl;
118 static int ata_force_tbl_size;
120 static char ata_force_param_buf[PAGE_SIZE] __initdata;
121 /* param_buf is thrown away after initialization, disallow read */
122 module_param_string(force, ata_force_param_buf, sizeof(ata_force_param_buf), 0);
123 MODULE_PARM_DESC(force, "Force ATA configurations including cable type, link speed and transfer mode (see Documentation/kernel-parameters.txt for details)");
125 static int atapi_enabled = 1;
126 module_param(atapi_enabled, int, 0444);
127 MODULE_PARM_DESC(atapi_enabled, "Enable discovery of ATAPI devices (0=off, 1=on)");
129 static int atapi_dmadir = 0;
130 module_param(atapi_dmadir, int, 0444);
131 MODULE_PARM_DESC(atapi_dmadir, "Enable ATAPI DMADIR bridge support (0=off, 1=on)");
133 int atapi_passthru16 = 1;
134 module_param(atapi_passthru16, int, 0444);
135 MODULE_PARM_DESC(atapi_passthru16, "Enable ATA_16 passthru for ATAPI devices; on by default (0=off, 1=on)");
138 module_param_named(fua, libata_fua, int, 0444);
139 MODULE_PARM_DESC(fua, "FUA support (0=off, 1=on)");
141 static int ata_ignore_hpa;
142 module_param_named(ignore_hpa, ata_ignore_hpa, int, 0644);
143 MODULE_PARM_DESC(ignore_hpa, "Ignore HPA limit (0=keep BIOS limits, 1=ignore limits, using full disk)");
145 static int libata_dma_mask = ATA_DMA_MASK_ATA|ATA_DMA_MASK_ATAPI|ATA_DMA_MASK_CFA;
146 module_param_named(dma, libata_dma_mask, int, 0444);
147 MODULE_PARM_DESC(dma, "DMA enable/disable (0x1==ATA, 0x2==ATAPI, 0x4==CF)");
149 static int ata_probe_timeout;
150 module_param(ata_probe_timeout, int, 0444);
151 MODULE_PARM_DESC(ata_probe_timeout, "Set ATA probing timeout (seconds)");
153 int libata_noacpi = 0;
154 module_param_named(noacpi, libata_noacpi, int, 0444);
155 MODULE_PARM_DESC(noacpi, "Disables the use of ACPI in probe/suspend/resume when set");
157 int libata_allow_tpm = 0;
158 module_param_named(allow_tpm, libata_allow_tpm, int, 0444);
159 MODULE_PARM_DESC(allow_tpm, "Permit the use of TPM commands");
161 MODULE_AUTHOR("Jeff Garzik");
162 MODULE_DESCRIPTION("Library module for ATA devices");
163 MODULE_LICENSE("GPL");
164 MODULE_VERSION(DRV_VERSION);
168 * ata_link_next - link iteration helper
169 * @link: the previous link, NULL to start
170 * @ap: ATA port containing links to iterate
171 * @mode: iteration mode, one of ATA_LITER_*
174 * Host lock or EH context.
177 * Pointer to the next link.
179 struct ata_link *ata_link_next(struct ata_link *link, struct ata_port *ap,
180 enum ata_link_iter_mode mode)
182 BUG_ON(mode != ATA_LITER_EDGE &&
183 mode != ATA_LITER_PMP_FIRST && mode != ATA_LITER_HOST_FIRST);
185 /* NULL link indicates start of iteration */
189 case ATA_LITER_PMP_FIRST:
190 if (sata_pmp_attached(ap))
193 case ATA_LITER_HOST_FIRST:
197 /* we just iterated over the host link, what's next? */
198 if (link == &ap->link)
200 case ATA_LITER_HOST_FIRST:
201 if (sata_pmp_attached(ap))
204 case ATA_LITER_PMP_FIRST:
205 if (unlikely(ap->slave_link))
206 return ap->slave_link;
212 /* slave_link excludes PMP */
213 if (unlikely(link == ap->slave_link))
216 /* we were over a PMP link */
217 if (++link < ap->pmp_link + ap->nr_pmp_links)
220 if (mode == ATA_LITER_PMP_FIRST)
227 * ata_dev_next - device iteration helper
228 * @dev: the previous device, NULL to start
229 * @link: ATA link containing devices to iterate
230 * @mode: iteration mode, one of ATA_DITER_*
233 * Host lock or EH context.
236 * Pointer to the next device.
238 struct ata_device *ata_dev_next(struct ata_device *dev, struct ata_link *link,
239 enum ata_dev_iter_mode mode)
241 BUG_ON(mode != ATA_DITER_ENABLED && mode != ATA_DITER_ENABLED_REVERSE &&
242 mode != ATA_DITER_ALL && mode != ATA_DITER_ALL_REVERSE);
244 /* NULL dev indicates start of iteration */
247 case ATA_DITER_ENABLED:
251 case ATA_DITER_ENABLED_REVERSE:
252 case ATA_DITER_ALL_REVERSE:
253 dev = link->device + ata_link_max_devices(link) - 1;
258 /* move to the next one */
260 case ATA_DITER_ENABLED:
262 if (++dev < link->device + ata_link_max_devices(link))
265 case ATA_DITER_ENABLED_REVERSE:
266 case ATA_DITER_ALL_REVERSE:
267 if (--dev >= link->device)
273 if ((mode == ATA_DITER_ENABLED || mode == ATA_DITER_ENABLED_REVERSE) &&
274 !ata_dev_enabled(dev))
280 * ata_dev_phys_link - find physical link for a device
281 * @dev: ATA device to look up physical link for
283 * Look up physical link which @dev is attached to. Note that
284 * this is different from @dev->link only when @dev is on slave
285 * link. For all other cases, it's the same as @dev->link.
291 * Pointer to the found physical link.
293 struct ata_link *ata_dev_phys_link(struct ata_device *dev)
295 struct ata_port *ap = dev->link->ap;
301 return ap->slave_link;
305 * ata_force_cbl - force cable type according to libata.force
306 * @ap: ATA port of interest
308 * Force cable type according to libata.force and whine about it.
309 * The last entry which has matching port number is used, so it
310 * can be specified as part of device force parameters. For
311 * example, both "a:40c,1.00:udma4" and "1.00:40c,udma4" have the
317 void ata_force_cbl(struct ata_port *ap)
321 for (i = ata_force_tbl_size - 1; i >= 0; i--) {
322 const struct ata_force_ent *fe = &ata_force_tbl[i];
324 if (fe->port != -1 && fe->port != ap->print_id)
327 if (fe->param.cbl == ATA_CBL_NONE)
330 ap->cbl = fe->param.cbl;
331 ata_port_printk(ap, KERN_NOTICE,
332 "FORCE: cable set to %s\n", fe->param.name);
338 * ata_force_link_limits - force link limits according to libata.force
339 * @link: ATA link of interest
341 * Force link flags and SATA spd limit according to libata.force
342 * and whine about it. When only the port part is specified
343 * (e.g. 1:), the limit applies to all links connected to both
344 * the host link and all fan-out ports connected via PMP. If the
345 * device part is specified as 0 (e.g. 1.00:), it specifies the
346 * first fan-out link not the host link. Device number 15 always
347 * points to the host link whether PMP is attached or not. If the
348 * controller has slave link, device number 16 points to it.
353 static void ata_force_link_limits(struct ata_link *link)
355 bool did_spd = false;
356 int linkno = link->pmp;
359 if (ata_is_host_link(link))
362 for (i = ata_force_tbl_size - 1; i >= 0; i--) {
363 const struct ata_force_ent *fe = &ata_force_tbl[i];
365 if (fe->port != -1 && fe->port != link->ap->print_id)
368 if (fe->device != -1 && fe->device != linkno)
371 /* only honor the first spd limit */
372 if (!did_spd && fe->param.spd_limit) {
373 link->hw_sata_spd_limit = (1 << fe->param.spd_limit) - 1;
374 ata_link_printk(link, KERN_NOTICE,
375 "FORCE: PHY spd limit set to %s\n",
380 /* let lflags stack */
381 if (fe->param.lflags) {
382 link->flags |= fe->param.lflags;
383 ata_link_printk(link, KERN_NOTICE,
384 "FORCE: link flag 0x%x forced -> 0x%x\n",
385 fe->param.lflags, link->flags);
391 * ata_force_xfermask - force xfermask according to libata.force
392 * @dev: ATA device of interest
394 * Force xfer_mask according to libata.force and whine about it.
395 * For consistency with link selection, device number 15 selects
396 * the first device connected to the host link.
401 static void ata_force_xfermask(struct ata_device *dev)
403 int devno = dev->link->pmp + dev->devno;
404 int alt_devno = devno;
407 /* allow n.15/16 for devices attached to host port */
408 if (ata_is_host_link(dev->link))
411 for (i = ata_force_tbl_size - 1; i >= 0; i--) {
412 const struct ata_force_ent *fe = &ata_force_tbl[i];
413 unsigned long pio_mask, mwdma_mask, udma_mask;
415 if (fe->port != -1 && fe->port != dev->link->ap->print_id)
418 if (fe->device != -1 && fe->device != devno &&
419 fe->device != alt_devno)
422 if (!fe->param.xfer_mask)
425 ata_unpack_xfermask(fe->param.xfer_mask,
426 &pio_mask, &mwdma_mask, &udma_mask);
428 dev->udma_mask = udma_mask;
429 else if (mwdma_mask) {
431 dev->mwdma_mask = mwdma_mask;
435 dev->pio_mask = pio_mask;
438 ata_dev_printk(dev, KERN_NOTICE,
439 "FORCE: xfer_mask set to %s\n", fe->param.name);
445 * ata_force_horkage - force horkage according to libata.force
446 * @dev: ATA device of interest
448 * Force horkage according to libata.force and whine about it.
449 * For consistency with link selection, device number 15 selects
450 * the first device connected to the host link.
455 static void ata_force_horkage(struct ata_device *dev)
457 int devno = dev->link->pmp + dev->devno;
458 int alt_devno = devno;
461 /* allow n.15/16 for devices attached to host port */
462 if (ata_is_host_link(dev->link))
465 for (i = 0; i < ata_force_tbl_size; i++) {
466 const struct ata_force_ent *fe = &ata_force_tbl[i];
468 if (fe->port != -1 && fe->port != dev->link->ap->print_id)
471 if (fe->device != -1 && fe->device != devno &&
472 fe->device != alt_devno)
475 if (!(~dev->horkage & fe->param.horkage_on) &&
476 !(dev->horkage & fe->param.horkage_off))
479 dev->horkage |= fe->param.horkage_on;
480 dev->horkage &= ~fe->param.horkage_off;
482 ata_dev_printk(dev, KERN_NOTICE,
483 "FORCE: horkage modified (%s)\n", fe->param.name);
488 * atapi_cmd_type - Determine ATAPI command type from SCSI opcode
489 * @opcode: SCSI opcode
491 * Determine ATAPI command type from @opcode.
497 * ATAPI_{READ|WRITE|READ_CD|PASS_THRU|MISC}
499 int atapi_cmd_type(u8 opcode)
508 case GPCMD_WRITE_AND_VERIFY_10:
512 case GPCMD_READ_CD_MSF:
513 return ATAPI_READ_CD;
517 if (atapi_passthru16)
518 return ATAPI_PASS_THRU;
526 * ata_tf_to_fis - Convert ATA taskfile to SATA FIS structure
527 * @tf: Taskfile to convert
528 * @pmp: Port multiplier port
529 * @is_cmd: This FIS is for command
530 * @fis: Buffer into which data will output
532 * Converts a standard ATA taskfile to a Serial ATA
533 * FIS structure (Register - Host to Device).
536 * Inherited from caller.
538 void ata_tf_to_fis(const struct ata_taskfile *tf, u8 pmp, int is_cmd, u8 *fis)
540 fis[0] = 0x27; /* Register - Host to Device FIS */
541 fis[1] = pmp & 0xf; /* Port multiplier number*/
543 fis[1] |= (1 << 7); /* bit 7 indicates Command FIS */
545 fis[2] = tf->command;
546 fis[3] = tf->feature;
553 fis[8] = tf->hob_lbal;
554 fis[9] = tf->hob_lbam;
555 fis[10] = tf->hob_lbah;
556 fis[11] = tf->hob_feature;
559 fis[13] = tf->hob_nsect;
570 * ata_tf_from_fis - Convert SATA FIS to ATA taskfile
571 * @fis: Buffer from which data will be input
572 * @tf: Taskfile to output
574 * Converts a serial ATA FIS structure to a standard ATA taskfile.
577 * Inherited from caller.
580 void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf)
582 tf->command = fis[2]; /* status */
583 tf->feature = fis[3]; /* error */
590 tf->hob_lbal = fis[8];
591 tf->hob_lbam = fis[9];
592 tf->hob_lbah = fis[10];
595 tf->hob_nsect = fis[13];
598 static const u8 ata_rw_cmds[] = {
602 ATA_CMD_READ_MULTI_EXT,
603 ATA_CMD_WRITE_MULTI_EXT,
607 ATA_CMD_WRITE_MULTI_FUA_EXT,
611 ATA_CMD_PIO_READ_EXT,
612 ATA_CMD_PIO_WRITE_EXT,
625 ATA_CMD_WRITE_FUA_EXT
629 * ata_rwcmd_protocol - set taskfile r/w commands and protocol
630 * @tf: command to examine and configure
631 * @dev: device tf belongs to
633 * Examine the device configuration and tf->flags to calculate
634 * the proper read/write commands and protocol to use.
639 static int ata_rwcmd_protocol(struct ata_taskfile *tf, struct ata_device *dev)
643 int index, fua, lba48, write;
645 fua = (tf->flags & ATA_TFLAG_FUA) ? 4 : 0;
646 lba48 = (tf->flags & ATA_TFLAG_LBA48) ? 2 : 0;
647 write = (tf->flags & ATA_TFLAG_WRITE) ? 1 : 0;
649 if (dev->flags & ATA_DFLAG_PIO) {
650 tf->protocol = ATA_PROT_PIO;
651 index = dev->multi_count ? 0 : 8;
652 } else if (lba48 && (dev->link->ap->flags & ATA_FLAG_PIO_LBA48)) {
653 /* Unable to use DMA due to host limitation */
654 tf->protocol = ATA_PROT_PIO;
655 index = dev->multi_count ? 0 : 8;
657 tf->protocol = ATA_PROT_DMA;
661 cmd = ata_rw_cmds[index + fua + lba48 + write];
670 * ata_tf_read_block - Read block address from ATA taskfile
671 * @tf: ATA taskfile of interest
672 * @dev: ATA device @tf belongs to
677 * Read block address from @tf. This function can handle all
678 * three address formats - LBA, LBA48 and CHS. tf->protocol and
679 * flags select the address format to use.
682 * Block address read from @tf.
684 u64 ata_tf_read_block(struct ata_taskfile *tf, struct ata_device *dev)
688 if (tf->flags & ATA_TFLAG_LBA) {
689 if (tf->flags & ATA_TFLAG_LBA48) {
690 block |= (u64)tf->hob_lbah << 40;
691 block |= (u64)tf->hob_lbam << 32;
692 block |= (u64)tf->hob_lbal << 24;
694 block |= (tf->device & 0xf) << 24;
696 block |= tf->lbah << 16;
697 block |= tf->lbam << 8;
702 cyl = tf->lbam | (tf->lbah << 8);
703 head = tf->device & 0xf;
706 block = (cyl * dev->heads + head) * dev->sectors + sect;
713 * ata_build_rw_tf - Build ATA taskfile for given read/write request
714 * @tf: Target ATA taskfile
715 * @dev: ATA device @tf belongs to
716 * @block: Block address
717 * @n_block: Number of blocks
718 * @tf_flags: RW/FUA etc...
724 * Build ATA taskfile @tf for read/write request described by
725 * @block, @n_block, @tf_flags and @tag on @dev.
729 * 0 on success, -ERANGE if the request is too large for @dev,
730 * -EINVAL if the request is invalid.
732 int ata_build_rw_tf(struct ata_taskfile *tf, struct ata_device *dev,
733 u64 block, u32 n_block, unsigned int tf_flags,
736 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
737 tf->flags |= tf_flags;
739 if (ata_ncq_enabled(dev) && likely(tag != ATA_TAG_INTERNAL)) {
741 if (!lba_48_ok(block, n_block))
744 tf->protocol = ATA_PROT_NCQ;
745 tf->flags |= ATA_TFLAG_LBA | ATA_TFLAG_LBA48;
747 if (tf->flags & ATA_TFLAG_WRITE)
748 tf->command = ATA_CMD_FPDMA_WRITE;
750 tf->command = ATA_CMD_FPDMA_READ;
752 tf->nsect = tag << 3;
753 tf->hob_feature = (n_block >> 8) & 0xff;
754 tf->feature = n_block & 0xff;
756 tf->hob_lbah = (block >> 40) & 0xff;
757 tf->hob_lbam = (block >> 32) & 0xff;
758 tf->hob_lbal = (block >> 24) & 0xff;
759 tf->lbah = (block >> 16) & 0xff;
760 tf->lbam = (block >> 8) & 0xff;
761 tf->lbal = block & 0xff;
764 if (tf->flags & ATA_TFLAG_FUA)
765 tf->device |= 1 << 7;
766 } else if (dev->flags & ATA_DFLAG_LBA) {
767 tf->flags |= ATA_TFLAG_LBA;
769 if (lba_28_ok(block, n_block)) {
771 tf->device |= (block >> 24) & 0xf;
772 } else if (lba_48_ok(block, n_block)) {
773 if (!(dev->flags & ATA_DFLAG_LBA48))
777 tf->flags |= ATA_TFLAG_LBA48;
779 tf->hob_nsect = (n_block >> 8) & 0xff;
781 tf->hob_lbah = (block >> 40) & 0xff;
782 tf->hob_lbam = (block >> 32) & 0xff;
783 tf->hob_lbal = (block >> 24) & 0xff;
785 /* request too large even for LBA48 */
788 if (unlikely(ata_rwcmd_protocol(tf, dev) < 0))
791 tf->nsect = n_block & 0xff;
793 tf->lbah = (block >> 16) & 0xff;
794 tf->lbam = (block >> 8) & 0xff;
795 tf->lbal = block & 0xff;
797 tf->device |= ATA_LBA;
800 u32 sect, head, cyl, track;
802 /* The request -may- be too large for CHS addressing. */
803 if (!lba_28_ok(block, n_block))
806 if (unlikely(ata_rwcmd_protocol(tf, dev) < 0))
809 /* Convert LBA to CHS */
810 track = (u32)block / dev->sectors;
811 cyl = track / dev->heads;
812 head = track % dev->heads;
813 sect = (u32)block % dev->sectors + 1;
815 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
816 (u32)block, track, cyl, head, sect);
818 /* Check whether the converted CHS can fit.
822 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
825 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
836 * ata_pack_xfermask - Pack pio, mwdma and udma masks into xfer_mask
837 * @pio_mask: pio_mask
838 * @mwdma_mask: mwdma_mask
839 * @udma_mask: udma_mask
841 * Pack @pio_mask, @mwdma_mask and @udma_mask into a single
842 * unsigned int xfer_mask.
850 unsigned long ata_pack_xfermask(unsigned long pio_mask,
851 unsigned long mwdma_mask,
852 unsigned long udma_mask)
854 return ((pio_mask << ATA_SHIFT_PIO) & ATA_MASK_PIO) |
855 ((mwdma_mask << ATA_SHIFT_MWDMA) & ATA_MASK_MWDMA) |
856 ((udma_mask << ATA_SHIFT_UDMA) & ATA_MASK_UDMA);
860 * ata_unpack_xfermask - Unpack xfer_mask into pio, mwdma and udma masks
861 * @xfer_mask: xfer_mask to unpack
862 * @pio_mask: resulting pio_mask
863 * @mwdma_mask: resulting mwdma_mask
864 * @udma_mask: resulting udma_mask
866 * Unpack @xfer_mask into @pio_mask, @mwdma_mask and @udma_mask.
867 * Any NULL distination masks will be ignored.
869 void ata_unpack_xfermask(unsigned long xfer_mask, unsigned long *pio_mask,
870 unsigned long *mwdma_mask, unsigned long *udma_mask)
873 *pio_mask = (xfer_mask & ATA_MASK_PIO) >> ATA_SHIFT_PIO;
875 *mwdma_mask = (xfer_mask & ATA_MASK_MWDMA) >> ATA_SHIFT_MWDMA;
877 *udma_mask = (xfer_mask & ATA_MASK_UDMA) >> ATA_SHIFT_UDMA;
880 static const struct ata_xfer_ent {
884 { ATA_SHIFT_PIO, ATA_NR_PIO_MODES, XFER_PIO_0 },
885 { ATA_SHIFT_MWDMA, ATA_NR_MWDMA_MODES, XFER_MW_DMA_0 },
886 { ATA_SHIFT_UDMA, ATA_NR_UDMA_MODES, XFER_UDMA_0 },
891 * ata_xfer_mask2mode - Find matching XFER_* for the given xfer_mask
892 * @xfer_mask: xfer_mask of interest
894 * Return matching XFER_* value for @xfer_mask. Only the highest
895 * bit of @xfer_mask is considered.
901 * Matching XFER_* value, 0xff if no match found.
903 u8 ata_xfer_mask2mode(unsigned long xfer_mask)
905 int highbit = fls(xfer_mask) - 1;
906 const struct ata_xfer_ent *ent;
908 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
909 if (highbit >= ent->shift && highbit < ent->shift + ent->bits)
910 return ent->base + highbit - ent->shift;
915 * ata_xfer_mode2mask - Find matching xfer_mask for XFER_*
916 * @xfer_mode: XFER_* of interest
918 * Return matching xfer_mask for @xfer_mode.
924 * Matching xfer_mask, 0 if no match found.
926 unsigned long ata_xfer_mode2mask(u8 xfer_mode)
928 const struct ata_xfer_ent *ent;
930 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
931 if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits)
932 return ((2 << (ent->shift + xfer_mode - ent->base)) - 1)
933 & ~((1 << ent->shift) - 1);
938 * ata_xfer_mode2shift - Find matching xfer_shift for XFER_*
939 * @xfer_mode: XFER_* of interest
941 * Return matching xfer_shift for @xfer_mode.
947 * Matching xfer_shift, -1 if no match found.
949 int ata_xfer_mode2shift(unsigned long xfer_mode)
951 const struct ata_xfer_ent *ent;
953 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
954 if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits)
960 * ata_mode_string - convert xfer_mask to string
961 * @xfer_mask: mask of bits supported; only highest bit counts.
963 * Determine string which represents the highest speed
964 * (highest bit in @modemask).
970 * Constant C string representing highest speed listed in
971 * @mode_mask, or the constant C string "<n/a>".
973 const char *ata_mode_string(unsigned long xfer_mask)
975 static const char * const xfer_mode_str[] = {
999 highbit = fls(xfer_mask) - 1;
1000 if (highbit >= 0 && highbit < ARRAY_SIZE(xfer_mode_str))
1001 return xfer_mode_str[highbit];
1005 static const char *sata_spd_string(unsigned int spd)
1007 static const char * const spd_str[] = {
1013 if (spd == 0 || (spd - 1) >= ARRAY_SIZE(spd_str))
1015 return spd_str[spd - 1];
1018 static int ata_dev_set_dipm(struct ata_device *dev, enum link_pm policy)
1020 struct ata_link *link = dev->link;
1021 struct ata_port *ap = link->ap;
1023 unsigned int err_mask;
1027 * disallow DIPM for drivers which haven't set
1028 * ATA_FLAG_IPM. This is because when DIPM is enabled,
1029 * phy ready will be set in the interrupt status on
1030 * state changes, which will cause some drivers to
1031 * think there are errors - additionally drivers will
1032 * need to disable hot plug.
1034 if (!(ap->flags & ATA_FLAG_IPM) || !ata_dev_enabled(dev)) {
1035 ap->pm_policy = NOT_AVAILABLE;
1040 * For DIPM, we will only enable it for the
1041 * min_power setting.
1043 * Why? Because Disks are too stupid to know that
1044 * If the host rejects a request to go to SLUMBER
1045 * they should retry at PARTIAL, and instead it
1046 * just would give up. So, for medium_power to
1047 * work at all, we need to only allow HIPM.
1049 rc = sata_scr_read(link, SCR_CONTROL, &scontrol);
1055 /* no restrictions on IPM transitions */
1056 scontrol &= ~(0x3 << 8);
1057 rc = sata_scr_write(link, SCR_CONTROL, scontrol);
1062 if (dev->flags & ATA_DFLAG_DIPM)
1063 err_mask = ata_dev_set_feature(dev,
1064 SETFEATURES_SATA_ENABLE, SATA_DIPM);
1067 /* allow IPM to PARTIAL */
1068 scontrol &= ~(0x1 << 8);
1069 scontrol |= (0x2 << 8);
1070 rc = sata_scr_write(link, SCR_CONTROL, scontrol);
1075 * we don't have to disable DIPM since IPM flags
1076 * disallow transitions to SLUMBER, which effectively
1077 * disable DIPM if it does not support PARTIAL
1081 case MAX_PERFORMANCE:
1082 /* disable all IPM transitions */
1083 scontrol |= (0x3 << 8);
1084 rc = sata_scr_write(link, SCR_CONTROL, scontrol);
1089 * we don't have to disable DIPM since IPM flags
1090 * disallow all transitions which effectively
1091 * disable DIPM anyway.
1096 /* FIXME: handle SET FEATURES failure */
1103 * ata_dev_enable_pm - enable SATA interface power management
1104 * @dev: device to enable power management
1105 * @policy: the link power management policy
1107 * Enable SATA Interface power management. This will enable
1108 * Device Interface Power Management (DIPM) for min_power
1109 * policy, and then call driver specific callbacks for
1110 * enabling Host Initiated Power management.
1113 * Returns: -EINVAL if IPM is not supported, 0 otherwise.
1115 void ata_dev_enable_pm(struct ata_device *dev, enum link_pm policy)
1118 struct ata_port *ap = dev->link->ap;
1120 /* set HIPM first, then DIPM */
1121 if (ap->ops->enable_pm)
1122 rc = ap->ops->enable_pm(ap, policy);
1125 rc = ata_dev_set_dipm(dev, policy);
1129 ap->pm_policy = MAX_PERFORMANCE;
1131 ap->pm_policy = policy;
1132 return /* rc */; /* hopefully we can use 'rc' eventually */
1137 * ata_dev_disable_pm - disable SATA interface power management
1138 * @dev: device to disable power management
1140 * Disable SATA Interface power management. This will disable
1141 * Device Interface Power Management (DIPM) without changing
1142 * policy, call driver specific callbacks for disabling Host
1143 * Initiated Power management.
1148 static void ata_dev_disable_pm(struct ata_device *dev)
1150 struct ata_port *ap = dev->link->ap;
1152 ata_dev_set_dipm(dev, MAX_PERFORMANCE);
1153 if (ap->ops->disable_pm)
1154 ap->ops->disable_pm(ap);
1156 #endif /* CONFIG_PM */
1158 void ata_lpm_schedule(struct ata_port *ap, enum link_pm policy)
1160 ap->pm_policy = policy;
1161 ap->link.eh_info.action |= ATA_EH_LPM;
1162 ap->link.eh_info.flags |= ATA_EHI_NO_AUTOPSY;
1163 ata_port_schedule_eh(ap);
1167 static void ata_lpm_enable(struct ata_host *host)
1169 struct ata_link *link;
1170 struct ata_port *ap;
1171 struct ata_device *dev;
1174 for (i = 0; i < host->n_ports; i++) {
1175 ap = host->ports[i];
1176 ata_for_each_link(link, ap, EDGE) {
1177 ata_for_each_dev(dev, link, ALL)
1178 ata_dev_disable_pm(dev);
1183 static void ata_lpm_disable(struct ata_host *host)
1187 for (i = 0; i < host->n_ports; i++) {
1188 struct ata_port *ap = host->ports[i];
1189 ata_lpm_schedule(ap, ap->pm_policy);
1192 #endif /* CONFIG_PM */
1195 * ata_dev_classify - determine device type based on ATA-spec signature
1196 * @tf: ATA taskfile register set for device to be identified
1198 * Determine from taskfile register contents whether a device is
1199 * ATA or ATAPI, as per "Signature and persistence" section
1200 * of ATA/PI spec (volume 1, sect 5.14).
1206 * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, %ATA_DEV_PMP or
1207 * %ATA_DEV_UNKNOWN the event of failure.
1209 unsigned int ata_dev_classify(const struct ata_taskfile *tf)
1211 /* Apple's open source Darwin code hints that some devices only
1212 * put a proper signature into the LBA mid/high registers,
1213 * So, we only check those. It's sufficient for uniqueness.
1215 * ATA/ATAPI-7 (d1532v1r1: Feb. 19, 2003) specified separate
1216 * signatures for ATA and ATAPI devices attached on SerialATA,
1217 * 0x3c/0xc3 and 0x69/0x96 respectively. However, SerialATA
1218 * spec has never mentioned about using different signatures
1219 * for ATA/ATAPI devices. Then, Serial ATA II: Port
1220 * Multiplier specification began to use 0x69/0x96 to identify
1221 * port multpliers and 0x3c/0xc3 to identify SEMB device.
1222 * ATA/ATAPI-7 dropped descriptions about 0x3c/0xc3 and
1223 * 0x69/0x96 shortly and described them as reserved for
1226 * We follow the current spec and consider that 0x69/0x96
1227 * identifies a port multiplier and 0x3c/0xc3 a SEMB device.
1229 if ((tf->lbam == 0) && (tf->lbah == 0)) {
1230 DPRINTK("found ATA device by sig\n");
1234 if ((tf->lbam == 0x14) && (tf->lbah == 0xeb)) {
1235 DPRINTK("found ATAPI device by sig\n");
1236 return ATA_DEV_ATAPI;
1239 if ((tf->lbam == 0x69) && (tf->lbah == 0x96)) {
1240 DPRINTK("found PMP device by sig\n");
1244 if ((tf->lbam == 0x3c) && (tf->lbah == 0xc3)) {
1245 printk(KERN_INFO "ata: SEMB device ignored\n");
1246 return ATA_DEV_SEMB_UNSUP; /* not yet */
1249 DPRINTK("unknown device\n");
1250 return ATA_DEV_UNKNOWN;
1254 * ata_id_string - Convert IDENTIFY DEVICE page into string
1255 * @id: IDENTIFY DEVICE results we will examine
1256 * @s: string into which data is output
1257 * @ofs: offset into identify device page
1258 * @len: length of string to return. must be an even number.
1260 * The strings in the IDENTIFY DEVICE page are broken up into
1261 * 16-bit chunks. Run through the string, and output each
1262 * 8-bit chunk linearly, regardless of platform.
1268 void ata_id_string(const u16 *id, unsigned char *s,
1269 unsigned int ofs, unsigned int len)
1290 * ata_id_c_string - Convert IDENTIFY DEVICE page into C string
1291 * @id: IDENTIFY DEVICE results we will examine
1292 * @s: string into which data is output
1293 * @ofs: offset into identify device page
1294 * @len: length of string to return. must be an odd number.
1296 * This function is identical to ata_id_string except that it
1297 * trims trailing spaces and terminates the resulting string with
1298 * null. @len must be actual maximum length (even number) + 1.
1303 void ata_id_c_string(const u16 *id, unsigned char *s,
1304 unsigned int ofs, unsigned int len)
1308 ata_id_string(id, s, ofs, len - 1);
1310 p = s + strnlen(s, len - 1);
1311 while (p > s && p[-1] == ' ')
1316 static u64 ata_id_n_sectors(const u16 *id)
1318 if (ata_id_has_lba(id)) {
1319 if (ata_id_has_lba48(id))
1320 return ata_id_u64(id, 100);
1322 return ata_id_u32(id, 60);
1324 if (ata_id_current_chs_valid(id))
1325 return ata_id_u32(id, 57);
1327 return id[1] * id[3] * id[6];
1331 u64 ata_tf_to_lba48(const struct ata_taskfile *tf)
1335 sectors |= ((u64)(tf->hob_lbah & 0xff)) << 40;
1336 sectors |= ((u64)(tf->hob_lbam & 0xff)) << 32;
1337 sectors |= ((u64)(tf->hob_lbal & 0xff)) << 24;
1338 sectors |= (tf->lbah & 0xff) << 16;
1339 sectors |= (tf->lbam & 0xff) << 8;
1340 sectors |= (tf->lbal & 0xff);
1345 u64 ata_tf_to_lba(const struct ata_taskfile *tf)
1349 sectors |= (tf->device & 0x0f) << 24;
1350 sectors |= (tf->lbah & 0xff) << 16;
1351 sectors |= (tf->lbam & 0xff) << 8;
1352 sectors |= (tf->lbal & 0xff);
1358 * ata_read_native_max_address - Read native max address
1359 * @dev: target device
1360 * @max_sectors: out parameter for the result native max address
1362 * Perform an LBA48 or LBA28 native size query upon the device in
1366 * 0 on success, -EACCES if command is aborted by the drive.
1367 * -EIO on other errors.
1369 static int ata_read_native_max_address(struct ata_device *dev, u64 *max_sectors)
1371 unsigned int err_mask;
1372 struct ata_taskfile tf;
1373 int lba48 = ata_id_has_lba48(dev->id);
1375 ata_tf_init(dev, &tf);
1377 /* always clear all address registers */
1378 tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
1381 tf.command = ATA_CMD_READ_NATIVE_MAX_EXT;
1382 tf.flags |= ATA_TFLAG_LBA48;
1384 tf.command = ATA_CMD_READ_NATIVE_MAX;
1386 tf.protocol |= ATA_PROT_NODATA;
1387 tf.device |= ATA_LBA;
1389 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
1391 ata_dev_printk(dev, KERN_WARNING, "failed to read native "
1392 "max address (err_mask=0x%x)\n", err_mask);
1393 if (err_mask == AC_ERR_DEV && (tf.feature & ATA_ABORTED))
1399 *max_sectors = ata_tf_to_lba48(&tf) + 1;
1401 *max_sectors = ata_tf_to_lba(&tf) + 1;
1402 if (dev->horkage & ATA_HORKAGE_HPA_SIZE)
1408 * ata_set_max_sectors - Set max sectors
1409 * @dev: target device
1410 * @new_sectors: new max sectors value to set for the device
1412 * Set max sectors of @dev to @new_sectors.
1415 * 0 on success, -EACCES if command is aborted or denied (due to
1416 * previous non-volatile SET_MAX) by the drive. -EIO on other
1419 static int ata_set_max_sectors(struct ata_device *dev, u64 new_sectors)
1421 unsigned int err_mask;
1422 struct ata_taskfile tf;
1423 int lba48 = ata_id_has_lba48(dev->id);
1427 ata_tf_init(dev, &tf);
1429 tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
1432 tf.command = ATA_CMD_SET_MAX_EXT;
1433 tf.flags |= ATA_TFLAG_LBA48;
1435 tf.hob_lbal = (new_sectors >> 24) & 0xff;
1436 tf.hob_lbam = (new_sectors >> 32) & 0xff;
1437 tf.hob_lbah = (new_sectors >> 40) & 0xff;
1439 tf.command = ATA_CMD_SET_MAX;
1441 tf.device |= (new_sectors >> 24) & 0xf;
1444 tf.protocol |= ATA_PROT_NODATA;
1445 tf.device |= ATA_LBA;
1447 tf.lbal = (new_sectors >> 0) & 0xff;
1448 tf.lbam = (new_sectors >> 8) & 0xff;
1449 tf.lbah = (new_sectors >> 16) & 0xff;
1451 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
1453 ata_dev_printk(dev, KERN_WARNING, "failed to set "
1454 "max address (err_mask=0x%x)\n", err_mask);
1455 if (err_mask == AC_ERR_DEV &&
1456 (tf.feature & (ATA_ABORTED | ATA_IDNF)))
1465 * ata_hpa_resize - Resize a device with an HPA set
1466 * @dev: Device to resize
1468 * Read the size of an LBA28 or LBA48 disk with HPA features and resize
1469 * it if required to the full size of the media. The caller must check
1470 * the drive has the HPA feature set enabled.
1473 * 0 on success, -errno on failure.
1475 static int ata_hpa_resize(struct ata_device *dev)
1477 struct ata_eh_context *ehc = &dev->link->eh_context;
1478 int print_info = ehc->i.flags & ATA_EHI_PRINTINFO;
1479 u64 sectors = ata_id_n_sectors(dev->id);
1483 /* do we need to do it? */
1484 if (dev->class != ATA_DEV_ATA ||
1485 !ata_id_has_lba(dev->id) || !ata_id_hpa_enabled(dev->id) ||
1486 (dev->horkage & ATA_HORKAGE_BROKEN_HPA))
1489 /* read native max address */
1490 rc = ata_read_native_max_address(dev, &native_sectors);
1492 /* If device aborted the command or HPA isn't going to
1493 * be unlocked, skip HPA resizing.
1495 if (rc == -EACCES || !ata_ignore_hpa) {
1496 ata_dev_printk(dev, KERN_WARNING, "HPA support seems "
1497 "broken, skipping HPA handling\n");
1498 dev->horkage |= ATA_HORKAGE_BROKEN_HPA;
1500 /* we can continue if device aborted the command */
1508 /* nothing to do? */
1509 if (native_sectors <= sectors || !ata_ignore_hpa) {
1510 if (!print_info || native_sectors == sectors)
1513 if (native_sectors > sectors)
1514 ata_dev_printk(dev, KERN_INFO,
1515 "HPA detected: current %llu, native %llu\n",
1516 (unsigned long long)sectors,
1517 (unsigned long long)native_sectors);
1518 else if (native_sectors < sectors)
1519 ata_dev_printk(dev, KERN_WARNING,
1520 "native sectors (%llu) is smaller than "
1522 (unsigned long long)native_sectors,
1523 (unsigned long long)sectors);
1527 /* let's unlock HPA */
1528 rc = ata_set_max_sectors(dev, native_sectors);
1529 if (rc == -EACCES) {
1530 /* if device aborted the command, skip HPA resizing */
1531 ata_dev_printk(dev, KERN_WARNING, "device aborted resize "
1532 "(%llu -> %llu), skipping HPA handling\n",
1533 (unsigned long long)sectors,
1534 (unsigned long long)native_sectors);
1535 dev->horkage |= ATA_HORKAGE_BROKEN_HPA;
1540 /* re-read IDENTIFY data */
1541 rc = ata_dev_reread_id(dev, 0);
1543 ata_dev_printk(dev, KERN_ERR, "failed to re-read IDENTIFY "
1544 "data after HPA resizing\n");
1549 u64 new_sectors = ata_id_n_sectors(dev->id);
1550 ata_dev_printk(dev, KERN_INFO,
1551 "HPA unlocked: %llu -> %llu, native %llu\n",
1552 (unsigned long long)sectors,
1553 (unsigned long long)new_sectors,
1554 (unsigned long long)native_sectors);
1561 * ata_dump_id - IDENTIFY DEVICE info debugging output
1562 * @id: IDENTIFY DEVICE page to dump
1564 * Dump selected 16-bit words from the given IDENTIFY DEVICE
1571 static inline void ata_dump_id(const u16 *id)
1573 DPRINTK("49==0x%04x "
1583 DPRINTK("80==0x%04x "
1593 DPRINTK("88==0x%04x "
1600 * ata_id_xfermask - Compute xfermask from the given IDENTIFY data
1601 * @id: IDENTIFY data to compute xfer mask from
1603 * Compute the xfermask for this device. This is not as trivial
1604 * as it seems if we must consider early devices correctly.
1606 * FIXME: pre IDE drive timing (do we care ?).
1614 unsigned long ata_id_xfermask(const u16 *id)
1616 unsigned long pio_mask, mwdma_mask, udma_mask;
1618 /* Usual case. Word 53 indicates word 64 is valid */
1619 if (id[ATA_ID_FIELD_VALID] & (1 << 1)) {
1620 pio_mask = id[ATA_ID_PIO_MODES] & 0x03;
1624 /* If word 64 isn't valid then Word 51 high byte holds
1625 * the PIO timing number for the maximum. Turn it into
1628 u8 mode = (id[ATA_ID_OLD_PIO_MODES] >> 8) & 0xFF;
1629 if (mode < 5) /* Valid PIO range */
1630 pio_mask = (2 << mode) - 1;
1634 /* But wait.. there's more. Design your standards by
1635 * committee and you too can get a free iordy field to
1636 * process. However its the speeds not the modes that
1637 * are supported... Note drivers using the timing API
1638 * will get this right anyway
1642 mwdma_mask = id[ATA_ID_MWDMA_MODES] & 0x07;
1644 if (ata_id_is_cfa(id)) {
1646 * Process compact flash extended modes
1648 int pio = id[163] & 0x7;
1649 int dma = (id[163] >> 3) & 7;
1652 pio_mask |= (1 << 5);
1654 pio_mask |= (1 << 6);
1656 mwdma_mask |= (1 << 3);
1658 mwdma_mask |= (1 << 4);
1662 if (id[ATA_ID_FIELD_VALID] & (1 << 2))
1663 udma_mask = id[ATA_ID_UDMA_MODES] & 0xff;
1665 return ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask);
1669 * ata_pio_queue_task - Queue port_task
1670 * @ap: The ata_port to queue port_task for
1671 * @data: data for @fn to use
1672 * @delay: delay time in msecs for workqueue function
1674 * Schedule @fn(@data) for execution after @delay jiffies using
1675 * port_task. There is one port_task per port and it's the
1676 * user(low level driver)'s responsibility to make sure that only
1677 * one task is active at any given time.
1679 * libata core layer takes care of synchronization between
1680 * port_task and EH. ata_pio_queue_task() may be ignored for EH
1684 * Inherited from caller.
1686 void ata_pio_queue_task(struct ata_port *ap, void *data, unsigned long delay)
1688 ap->port_task_data = data;
1690 /* may fail if ata_port_flush_task() in progress */
1691 queue_delayed_work(ata_wq, &ap->port_task, msecs_to_jiffies(delay));
1695 * ata_port_flush_task - Flush port_task
1696 * @ap: The ata_port to flush port_task for
1698 * After this function completes, port_task is guranteed not to
1699 * be running or scheduled.
1702 * Kernel thread context (may sleep)
1704 void ata_port_flush_task(struct ata_port *ap)
1708 cancel_rearming_delayed_work(&ap->port_task);
1710 if (ata_msg_ctl(ap))
1711 ata_port_printk(ap, KERN_DEBUG, "%s: EXIT\n", __func__);
1714 static void ata_qc_complete_internal(struct ata_queued_cmd *qc)
1716 struct completion *waiting = qc->private_data;
1722 * ata_exec_internal_sg - execute libata internal command
1723 * @dev: Device to which the command is sent
1724 * @tf: Taskfile registers for the command and the result
1725 * @cdb: CDB for packet command
1726 * @dma_dir: Data tranfer direction of the command
1727 * @sgl: sg list for the data buffer of the command
1728 * @n_elem: Number of sg entries
1729 * @timeout: Timeout in msecs (0 for default)
1731 * Executes libata internal command with timeout. @tf contains
1732 * command on entry and result on return. Timeout and error
1733 * conditions are reported via return value. No recovery action
1734 * is taken after a command times out. It's caller's duty to
1735 * clean up after timeout.
1738 * None. Should be called with kernel context, might sleep.
1741 * Zero on success, AC_ERR_* mask on failure
1743 unsigned ata_exec_internal_sg(struct ata_device *dev,
1744 struct ata_taskfile *tf, const u8 *cdb,
1745 int dma_dir, struct scatterlist *sgl,
1746 unsigned int n_elem, unsigned long timeout)
1748 struct ata_link *link = dev->link;
1749 struct ata_port *ap = link->ap;
1750 u8 command = tf->command;
1751 int auto_timeout = 0;
1752 struct ata_queued_cmd *qc;
1753 unsigned int tag, preempted_tag;
1754 u32 preempted_sactive, preempted_qc_active;
1755 int preempted_nr_active_links;
1756 DECLARE_COMPLETION_ONSTACK(wait);
1757 unsigned long flags;
1758 unsigned int err_mask;
1761 spin_lock_irqsave(ap->lock, flags);
1763 /* no internal command while frozen */
1764 if (ap->pflags & ATA_PFLAG_FROZEN) {
1765 spin_unlock_irqrestore(ap->lock, flags);
1766 return AC_ERR_SYSTEM;
1769 /* initialize internal qc */
1771 /* XXX: Tag 0 is used for drivers with legacy EH as some
1772 * drivers choke if any other tag is given. This breaks
1773 * ata_tag_internal() test for those drivers. Don't use new
1774 * EH stuff without converting to it.
1776 if (ap->ops->error_handler)
1777 tag = ATA_TAG_INTERNAL;
1781 if (test_and_set_bit(tag, &ap->qc_allocated))
1783 qc = __ata_qc_from_tag(ap, tag);
1791 preempted_tag = link->active_tag;
1792 preempted_sactive = link->sactive;
1793 preempted_qc_active = ap->qc_active;
1794 preempted_nr_active_links = ap->nr_active_links;
1795 link->active_tag = ATA_TAG_POISON;
1798 ap->nr_active_links = 0;
1800 /* prepare & issue qc */
1803 memcpy(qc->cdb, cdb, ATAPI_CDB_LEN);
1804 qc->flags |= ATA_QCFLAG_RESULT_TF;
1805 qc->dma_dir = dma_dir;
1806 if (dma_dir != DMA_NONE) {
1807 unsigned int i, buflen = 0;
1808 struct scatterlist *sg;
1810 for_each_sg(sgl, sg, n_elem, i)
1811 buflen += sg->length;
1813 ata_sg_init(qc, sgl, n_elem);
1814 qc->nbytes = buflen;
1817 qc->private_data = &wait;
1818 qc->complete_fn = ata_qc_complete_internal;
1822 spin_unlock_irqrestore(ap->lock, flags);
1825 if (ata_probe_timeout)
1826 timeout = ata_probe_timeout * 1000;
1828 timeout = ata_internal_cmd_timeout(dev, command);
1833 rc = wait_for_completion_timeout(&wait, msecs_to_jiffies(timeout));
1835 ata_port_flush_task(ap);
1838 spin_lock_irqsave(ap->lock, flags);
1840 /* We're racing with irq here. If we lose, the
1841 * following test prevents us from completing the qc
1842 * twice. If we win, the port is frozen and will be
1843 * cleaned up by ->post_internal_cmd().
1845 if (qc->flags & ATA_QCFLAG_ACTIVE) {
1846 qc->err_mask |= AC_ERR_TIMEOUT;
1848 if (ap->ops->error_handler)
1849 ata_port_freeze(ap);
1851 ata_qc_complete(qc);
1853 if (ata_msg_warn(ap))
1854 ata_dev_printk(dev, KERN_WARNING,
1855 "qc timeout (cmd 0x%x)\n", command);
1858 spin_unlock_irqrestore(ap->lock, flags);
1861 /* do post_internal_cmd */
1862 if (ap->ops->post_internal_cmd)
1863 ap->ops->post_internal_cmd(qc);
1865 /* perform minimal error analysis */
1866 if (qc->flags & ATA_QCFLAG_FAILED) {
1867 if (qc->result_tf.command & (ATA_ERR | ATA_DF))
1868 qc->err_mask |= AC_ERR_DEV;
1871 qc->err_mask |= AC_ERR_OTHER;
1873 if (qc->err_mask & ~AC_ERR_OTHER)
1874 qc->err_mask &= ~AC_ERR_OTHER;
1878 spin_lock_irqsave(ap->lock, flags);
1880 *tf = qc->result_tf;
1881 err_mask = qc->err_mask;
1884 link->active_tag = preempted_tag;
1885 link->sactive = preempted_sactive;
1886 ap->qc_active = preempted_qc_active;
1887 ap->nr_active_links = preempted_nr_active_links;
1889 /* XXX - Some LLDDs (sata_mv) disable port on command failure.
1890 * Until those drivers are fixed, we detect the condition
1891 * here, fail the command with AC_ERR_SYSTEM and reenable the
1894 * Note that this doesn't change any behavior as internal
1895 * command failure results in disabling the device in the
1896 * higher layer for LLDDs without new reset/EH callbacks.
1898 * Kill the following code as soon as those drivers are fixed.
1900 if (ap->flags & ATA_FLAG_DISABLED) {
1901 err_mask |= AC_ERR_SYSTEM;
1905 spin_unlock_irqrestore(ap->lock, flags);
1907 if ((err_mask & AC_ERR_TIMEOUT) && auto_timeout)
1908 ata_internal_cmd_timed_out(dev, command);
1914 * ata_exec_internal - execute libata internal command
1915 * @dev: Device to which the command is sent
1916 * @tf: Taskfile registers for the command and the result
1917 * @cdb: CDB for packet command
1918 * @dma_dir: Data tranfer direction of the command
1919 * @buf: Data buffer of the command
1920 * @buflen: Length of data buffer
1921 * @timeout: Timeout in msecs (0 for default)
1923 * Wrapper around ata_exec_internal_sg() which takes simple
1924 * buffer instead of sg list.
1927 * None. Should be called with kernel context, might sleep.
1930 * Zero on success, AC_ERR_* mask on failure
1932 unsigned ata_exec_internal(struct ata_device *dev,
1933 struct ata_taskfile *tf, const u8 *cdb,
1934 int dma_dir, void *buf, unsigned int buflen,
1935 unsigned long timeout)
1937 struct scatterlist *psg = NULL, sg;
1938 unsigned int n_elem = 0;
1940 if (dma_dir != DMA_NONE) {
1942 sg_init_one(&sg, buf, buflen);
1947 return ata_exec_internal_sg(dev, tf, cdb, dma_dir, psg, n_elem,
1952 * ata_do_simple_cmd - execute simple internal command
1953 * @dev: Device to which the command is sent
1954 * @cmd: Opcode to execute
1956 * Execute a 'simple' command, that only consists of the opcode
1957 * 'cmd' itself, without filling any other registers
1960 * Kernel thread context (may sleep).
1963 * Zero on success, AC_ERR_* mask on failure
1965 unsigned int ata_do_simple_cmd(struct ata_device *dev, u8 cmd)
1967 struct ata_taskfile tf;
1969 ata_tf_init(dev, &tf);
1972 tf.flags |= ATA_TFLAG_DEVICE;
1973 tf.protocol = ATA_PROT_NODATA;
1975 return ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
1979 * ata_pio_need_iordy - check if iordy needed
1982 * Check if the current speed of the device requires IORDY. Used
1983 * by various controllers for chip configuration.
1986 unsigned int ata_pio_need_iordy(const struct ata_device *adev)
1988 /* Controller doesn't support IORDY. Probably a pointless check
1989 as the caller should know this */
1990 if (adev->link->ap->flags & ATA_FLAG_NO_IORDY)
1992 /* CF spec. r4.1 Table 22 says no iordy on PIO5 and PIO6. */
1993 if (ata_id_is_cfa(adev->id)
1994 && (adev->pio_mode == XFER_PIO_5 || adev->pio_mode == XFER_PIO_6))
1996 /* PIO3 and higher it is mandatory */
1997 if (adev->pio_mode > XFER_PIO_2)
1999 /* We turn it on when possible */
2000 if (ata_id_has_iordy(adev->id))
2006 * ata_pio_mask_no_iordy - Return the non IORDY mask
2009 * Compute the highest mode possible if we are not using iordy. Return
2010 * -1 if no iordy mode is available.
2013 static u32 ata_pio_mask_no_iordy(const struct ata_device *adev)
2015 /* If we have no drive specific rule, then PIO 2 is non IORDY */
2016 if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE */
2017 u16 pio = adev->id[ATA_ID_EIDE_PIO];
2018 /* Is the speed faster than the drive allows non IORDY ? */
2020 /* This is cycle times not frequency - watch the logic! */
2021 if (pio > 240) /* PIO2 is 240nS per cycle */
2022 return 3 << ATA_SHIFT_PIO;
2023 return 7 << ATA_SHIFT_PIO;
2026 return 3 << ATA_SHIFT_PIO;
2030 * ata_do_dev_read_id - default ID read method
2032 * @tf: proposed taskfile
2035 * Issue the identify taskfile and hand back the buffer containing
2036 * identify data. For some RAID controllers and for pre ATA devices
2037 * this function is wrapped or replaced by the driver
2039 unsigned int ata_do_dev_read_id(struct ata_device *dev,
2040 struct ata_taskfile *tf, u16 *id)
2042 return ata_exec_internal(dev, tf, NULL, DMA_FROM_DEVICE,
2043 id, sizeof(id[0]) * ATA_ID_WORDS, 0);
2047 * ata_dev_read_id - Read ID data from the specified device
2048 * @dev: target device
2049 * @p_class: pointer to class of the target device (may be changed)
2050 * @flags: ATA_READID_* flags
2051 * @id: buffer to read IDENTIFY data into
2053 * Read ID data from the specified device. ATA_CMD_ID_ATA is
2054 * performed on ATA devices and ATA_CMD_ID_ATAPI on ATAPI
2055 * devices. This function also issues ATA_CMD_INIT_DEV_PARAMS
2056 * for pre-ATA4 drives.
2058 * FIXME: ATA_CMD_ID_ATA is optional for early drives and right
2059 * now we abort if we hit that case.
2062 * Kernel thread context (may sleep)
2065 * 0 on success, -errno otherwise.
2067 int ata_dev_read_id(struct ata_device *dev, unsigned int *p_class,
2068 unsigned int flags, u16 *id)
2070 struct ata_port *ap = dev->link->ap;
2071 unsigned int class = *p_class;
2072 struct ata_taskfile tf;
2073 unsigned int err_mask = 0;
2075 int may_fallback = 1, tried_spinup = 0;
2078 if (ata_msg_ctl(ap))
2079 ata_dev_printk(dev, KERN_DEBUG, "%s: ENTER\n", __func__);
2082 ata_tf_init(dev, &tf);
2086 tf.command = ATA_CMD_ID_ATA;
2089 tf.command = ATA_CMD_ID_ATAPI;
2093 reason = "unsupported class";
2097 tf.protocol = ATA_PROT_PIO;
2099 /* Some devices choke if TF registers contain garbage. Make
2100 * sure those are properly initialized.
2102 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2104 /* Device presence detection is unreliable on some
2105 * controllers. Always poll IDENTIFY if available.
2107 tf.flags |= ATA_TFLAG_POLLING;
2109 if (ap->ops->read_id)
2110 err_mask = ap->ops->read_id(dev, &tf, id);
2112 err_mask = ata_do_dev_read_id(dev, &tf, id);
2115 if (err_mask & AC_ERR_NODEV_HINT) {
2116 ata_dev_printk(dev, KERN_DEBUG,
2117 "NODEV after polling detection\n");
2121 if ((err_mask == AC_ERR_DEV) && (tf.feature & ATA_ABORTED)) {
2122 /* Device or controller might have reported
2123 * the wrong device class. Give a shot at the
2124 * other IDENTIFY if the current one is
2125 * aborted by the device.
2130 if (class == ATA_DEV_ATA)
2131 class = ATA_DEV_ATAPI;
2133 class = ATA_DEV_ATA;
2137 /* Control reaches here iff the device aborted
2138 * both flavors of IDENTIFYs which happens
2139 * sometimes with phantom devices.
2141 ata_dev_printk(dev, KERN_DEBUG,
2142 "both IDENTIFYs aborted, assuming NODEV\n");
2147 reason = "I/O error";
2151 /* Falling back doesn't make sense if ID data was read
2152 * successfully at least once.
2156 swap_buf_le16(id, ATA_ID_WORDS);
2160 reason = "device reports invalid type";
2162 if (class == ATA_DEV_ATA) {
2163 if (!ata_id_is_ata(id) && !ata_id_is_cfa(id))
2166 if (ata_id_is_ata(id))
2170 if (!tried_spinup && (id[2] == 0x37c8 || id[2] == 0x738c)) {
2173 * Drive powered-up in standby mode, and requires a specific
2174 * SET_FEATURES spin-up subcommand before it will accept
2175 * anything other than the original IDENTIFY command.
2177 err_mask = ata_dev_set_feature(dev, SETFEATURES_SPINUP, 0);
2178 if (err_mask && id[2] != 0x738c) {
2180 reason = "SPINUP failed";
2184 * If the drive initially returned incomplete IDENTIFY info,
2185 * we now must reissue the IDENTIFY command.
2187 if (id[2] == 0x37c8)
2191 if ((flags & ATA_READID_POSTRESET) && class == ATA_DEV_ATA) {
2193 * The exact sequence expected by certain pre-ATA4 drives is:
2195 * IDENTIFY (optional in early ATA)
2196 * INITIALIZE DEVICE PARAMETERS (later IDE and ATA)
2198 * Some drives were very specific about that exact sequence.
2200 * Note that ATA4 says lba is mandatory so the second check
2201 * shoud never trigger.
2203 if (ata_id_major_version(id) < 4 || !ata_id_has_lba(id)) {
2204 err_mask = ata_dev_init_params(dev, id[3], id[6]);
2207 reason = "INIT_DEV_PARAMS failed";
2211 /* current CHS translation info (id[53-58]) might be
2212 * changed. reread the identify device info.
2214 flags &= ~ATA_READID_POSTRESET;
2224 if (ata_msg_warn(ap))
2225 ata_dev_printk(dev, KERN_WARNING, "failed to IDENTIFY "
2226 "(%s, err_mask=0x%x)\n", reason, err_mask);
2230 static inline u8 ata_dev_knobble(struct ata_device *dev)
2232 struct ata_port *ap = dev->link->ap;
2234 if (ata_dev_blacklisted(dev) & ATA_HORKAGE_BRIDGE_OK)
2237 return ((ap->cbl == ATA_CBL_SATA) && (!ata_id_is_sata(dev->id)));
2240 static void ata_dev_config_ncq(struct ata_device *dev,
2241 char *desc, size_t desc_sz)
2243 struct ata_port *ap = dev->link->ap;
2244 int hdepth = 0, ddepth = ata_id_queue_depth(dev->id);
2246 if (!ata_id_has_ncq(dev->id)) {
2250 if (dev->horkage & ATA_HORKAGE_NONCQ) {
2251 snprintf(desc, desc_sz, "NCQ (not used)");
2254 if (ap->flags & ATA_FLAG_NCQ) {
2255 hdepth = min(ap->scsi_host->can_queue, ATA_MAX_QUEUE - 1);
2256 dev->flags |= ATA_DFLAG_NCQ;
2259 if (hdepth >= ddepth)
2260 snprintf(desc, desc_sz, "NCQ (depth %d)", ddepth);
2262 snprintf(desc, desc_sz, "NCQ (depth %d/%d)", hdepth, ddepth);
2266 * ata_dev_configure - Configure the specified ATA/ATAPI device
2267 * @dev: Target device to configure
2269 * Configure @dev according to @dev->id. Generic and low-level
2270 * driver specific fixups are also applied.
2273 * Kernel thread context (may sleep)
2276 * 0 on success, -errno otherwise
2278 int ata_dev_configure(struct ata_device *dev)
2280 struct ata_port *ap = dev->link->ap;
2281 struct ata_eh_context *ehc = &dev->link->eh_context;
2282 int print_info = ehc->i.flags & ATA_EHI_PRINTINFO;
2283 const u16 *id = dev->id;
2284 unsigned long xfer_mask;
2285 char revbuf[7]; /* XYZ-99\0 */
2286 char fwrevbuf[ATA_ID_FW_REV_LEN+1];
2287 char modelbuf[ATA_ID_PROD_LEN+1];
2290 if (!ata_dev_enabled(dev) && ata_msg_info(ap)) {
2291 ata_dev_printk(dev, KERN_INFO, "%s: ENTER/EXIT -- nodev\n",
2296 if (ata_msg_probe(ap))
2297 ata_dev_printk(dev, KERN_DEBUG, "%s: ENTER\n", __func__);
2300 dev->horkage |= ata_dev_blacklisted(dev);
2301 ata_force_horkage(dev);
2303 if (dev->horkage & ATA_HORKAGE_DISABLE) {
2304 ata_dev_printk(dev, KERN_INFO,
2305 "unsupported device, disabling\n");
2306 ata_dev_disable(dev);
2310 if ((!atapi_enabled || (ap->flags & ATA_FLAG_NO_ATAPI)) &&
2311 dev->class == ATA_DEV_ATAPI) {
2312 ata_dev_printk(dev, KERN_WARNING,
2313 "WARNING: ATAPI is %s, device ignored.\n",
2314 atapi_enabled ? "not supported with this driver"
2316 ata_dev_disable(dev);
2320 /* let ACPI work its magic */
2321 rc = ata_acpi_on_devcfg(dev);
2325 /* massage HPA, do it early as it might change IDENTIFY data */
2326 rc = ata_hpa_resize(dev);
2330 /* print device capabilities */
2331 if (ata_msg_probe(ap))
2332 ata_dev_printk(dev, KERN_DEBUG,
2333 "%s: cfg 49:%04x 82:%04x 83:%04x 84:%04x "
2334 "85:%04x 86:%04x 87:%04x 88:%04x\n",
2336 id[49], id[82], id[83], id[84],
2337 id[85], id[86], id[87], id[88]);
2339 /* initialize to-be-configured parameters */
2340 dev->flags &= ~ATA_DFLAG_CFG_MASK;
2341 dev->max_sectors = 0;
2349 * common ATA, ATAPI feature tests
2352 /* find max transfer mode; for printk only */
2353 xfer_mask = ata_id_xfermask(id);
2355 if (ata_msg_probe(ap))
2358 /* SCSI only uses 4-char revisions, dump full 8 chars from ATA */
2359 ata_id_c_string(dev->id, fwrevbuf, ATA_ID_FW_REV,
2362 ata_id_c_string(dev->id, modelbuf, ATA_ID_PROD,
2365 /* ATA-specific feature tests */
2366 if (dev->class == ATA_DEV_ATA) {
2367 if (ata_id_is_cfa(id)) {
2368 if (id[162] & 1) /* CPRM may make this media unusable */
2369 ata_dev_printk(dev, KERN_WARNING,
2370 "supports DRM functions and may "
2371 "not be fully accessable.\n");
2372 snprintf(revbuf, 7, "CFA");
2374 snprintf(revbuf, 7, "ATA-%d", ata_id_major_version(id));
2375 /* Warn the user if the device has TPM extensions */
2376 if (ata_id_has_tpm(id))
2377 ata_dev_printk(dev, KERN_WARNING,
2378 "supports DRM functions and may "
2379 "not be fully accessable.\n");
2382 dev->n_sectors = ata_id_n_sectors(id);
2384 if (dev->id[59] & 0x100)
2385 dev->multi_count = dev->id[59] & 0xff;
2387 if (ata_id_has_lba(id)) {
2388 const char *lba_desc;
2392 dev->flags |= ATA_DFLAG_LBA;
2393 if (ata_id_has_lba48(id)) {
2394 dev->flags |= ATA_DFLAG_LBA48;
2397 if (dev->n_sectors >= (1UL << 28) &&
2398 ata_id_has_flush_ext(id))
2399 dev->flags |= ATA_DFLAG_FLUSH_EXT;
2403 ata_dev_config_ncq(dev, ncq_desc, sizeof(ncq_desc));
2405 /* print device info to dmesg */
2406 if (ata_msg_drv(ap) && print_info) {
2407 ata_dev_printk(dev, KERN_INFO,
2408 "%s: %s, %s, max %s\n",
2409 revbuf, modelbuf, fwrevbuf,
2410 ata_mode_string(xfer_mask));
2411 ata_dev_printk(dev, KERN_INFO,
2412 "%Lu sectors, multi %u: %s %s\n",
2413 (unsigned long long)dev->n_sectors,
2414 dev->multi_count, lba_desc, ncq_desc);
2419 /* Default translation */
2420 dev->cylinders = id[1];
2422 dev->sectors = id[6];
2424 if (ata_id_current_chs_valid(id)) {
2425 /* Current CHS translation is valid. */
2426 dev->cylinders = id[54];
2427 dev->heads = id[55];
2428 dev->sectors = id[56];
2431 /* print device info to dmesg */
2432 if (ata_msg_drv(ap) && print_info) {
2433 ata_dev_printk(dev, KERN_INFO,
2434 "%s: %s, %s, max %s\n",
2435 revbuf, modelbuf, fwrevbuf,
2436 ata_mode_string(xfer_mask));
2437 ata_dev_printk(dev, KERN_INFO,
2438 "%Lu sectors, multi %u, CHS %u/%u/%u\n",
2439 (unsigned long long)dev->n_sectors,
2440 dev->multi_count, dev->cylinders,
2441 dev->heads, dev->sectors);
2448 /* ATAPI-specific feature tests */
2449 else if (dev->class == ATA_DEV_ATAPI) {
2450 const char *cdb_intr_string = "";
2451 const char *atapi_an_string = "";
2452 const char *dma_dir_string = "";
2455 rc = atapi_cdb_len(id);
2456 if ((rc < 12) || (rc > ATAPI_CDB_LEN)) {
2457 if (ata_msg_warn(ap))
2458 ata_dev_printk(dev, KERN_WARNING,
2459 "unsupported CDB len\n");
2463 dev->cdb_len = (unsigned int) rc;
2465 /* Enable ATAPI AN if both the host and device have
2466 * the support. If PMP is attached, SNTF is required
2467 * to enable ATAPI AN to discern between PHY status
2468 * changed notifications and ATAPI ANs.
2470 if ((ap->flags & ATA_FLAG_AN) && ata_id_has_atapi_AN(id) &&
2471 (!sata_pmp_attached(ap) ||
2472 sata_scr_read(&ap->link, SCR_NOTIFICATION, &sntf) == 0)) {
2473 unsigned int err_mask;
2475 /* issue SET feature command to turn this on */
2476 err_mask = ata_dev_set_feature(dev,
2477 SETFEATURES_SATA_ENABLE, SATA_AN);
2479 ata_dev_printk(dev, KERN_ERR,
2480 "failed to enable ATAPI AN "
2481 "(err_mask=0x%x)\n", err_mask);
2483 dev->flags |= ATA_DFLAG_AN;
2484 atapi_an_string = ", ATAPI AN";
2488 if (ata_id_cdb_intr(dev->id)) {
2489 dev->flags |= ATA_DFLAG_CDB_INTR;
2490 cdb_intr_string = ", CDB intr";
2493 if (atapi_dmadir || atapi_id_dmadir(dev->id)) {
2494 dev->flags |= ATA_DFLAG_DMADIR;
2495 dma_dir_string = ", DMADIR";
2498 /* print device info to dmesg */
2499 if (ata_msg_drv(ap) && print_info)
2500 ata_dev_printk(dev, KERN_INFO,
2501 "ATAPI: %s, %s, max %s%s%s%s\n",
2503 ata_mode_string(xfer_mask),
2504 cdb_intr_string, atapi_an_string,
2508 /* determine max_sectors */
2509 dev->max_sectors = ATA_MAX_SECTORS;
2510 if (dev->flags & ATA_DFLAG_LBA48)
2511 dev->max_sectors = ATA_MAX_SECTORS_LBA48;
2513 if (!(dev->horkage & ATA_HORKAGE_IPM)) {
2514 if (ata_id_has_hipm(dev->id))
2515 dev->flags |= ATA_DFLAG_HIPM;
2516 if (ata_id_has_dipm(dev->id))
2517 dev->flags |= ATA_DFLAG_DIPM;
2520 /* Limit PATA drive on SATA cable bridge transfers to udma5,
2522 if (ata_dev_knobble(dev)) {
2523 if (ata_msg_drv(ap) && print_info)
2524 ata_dev_printk(dev, KERN_INFO,
2525 "applying bridge limits\n");
2526 dev->udma_mask &= ATA_UDMA5;
2527 dev->max_sectors = ATA_MAX_SECTORS;
2530 if ((dev->class == ATA_DEV_ATAPI) &&
2531 (atapi_command_packet_set(id) == TYPE_TAPE)) {
2532 dev->max_sectors = ATA_MAX_SECTORS_TAPE;
2533 dev->horkage |= ATA_HORKAGE_STUCK_ERR;
2536 if (dev->horkage & ATA_HORKAGE_MAX_SEC_128)
2537 dev->max_sectors = min_t(unsigned int, ATA_MAX_SECTORS_128,
2540 if (ata_dev_blacklisted(dev) & ATA_HORKAGE_IPM) {
2541 dev->horkage |= ATA_HORKAGE_IPM;
2543 /* reset link pm_policy for this port to no pm */
2544 ap->pm_policy = MAX_PERFORMANCE;
2547 if (ap->ops->dev_config)
2548 ap->ops->dev_config(dev);
2550 if (dev->horkage & ATA_HORKAGE_DIAGNOSTIC) {
2551 /* Let the user know. We don't want to disallow opens for
2552 rescue purposes, or in case the vendor is just a blithering
2553 idiot. Do this after the dev_config call as some controllers
2554 with buggy firmware may want to avoid reporting false device
2558 ata_dev_printk(dev, KERN_WARNING,
2559 "Drive reports diagnostics failure. This may indicate a drive\n");
2560 ata_dev_printk(dev, KERN_WARNING,
2561 "fault or invalid emulation. Contact drive vendor for information.\n");
2565 if ((dev->horkage & ATA_HORKAGE_FIRMWARE_WARN) && print_info) {
2566 ata_dev_printk(dev, KERN_WARNING, "WARNING: device requires "
2567 "firmware update to be fully functional.\n");
2568 ata_dev_printk(dev, KERN_WARNING, " contact the vendor "
2569 "or visit http://ata.wiki.kernel.org.\n");
2575 if (ata_msg_probe(ap))
2576 ata_dev_printk(dev, KERN_DEBUG,
2577 "%s: EXIT, err\n", __func__);
2582 * ata_cable_40wire - return 40 wire cable type
2585 * Helper method for drivers which want to hardwire 40 wire cable
2589 int ata_cable_40wire(struct ata_port *ap)
2591 return ATA_CBL_PATA40;
2595 * ata_cable_80wire - return 80 wire cable type
2598 * Helper method for drivers which want to hardwire 80 wire cable
2602 int ata_cable_80wire(struct ata_port *ap)
2604 return ATA_CBL_PATA80;
2608 * ata_cable_unknown - return unknown PATA cable.
2611 * Helper method for drivers which have no PATA cable detection.
2614 int ata_cable_unknown(struct ata_port *ap)
2616 return ATA_CBL_PATA_UNK;
2620 * ata_cable_ignore - return ignored PATA cable.
2623 * Helper method for drivers which don't use cable type to limit
2626 int ata_cable_ignore(struct ata_port *ap)
2628 return ATA_CBL_PATA_IGN;
2632 * ata_cable_sata - return SATA cable type
2635 * Helper method for drivers which have SATA cables
2638 int ata_cable_sata(struct ata_port *ap)
2640 return ATA_CBL_SATA;
2644 * ata_bus_probe - Reset and probe ATA bus
2647 * Master ATA bus probing function. Initiates a hardware-dependent
2648 * bus reset, then attempts to identify any devices found on
2652 * PCI/etc. bus probe sem.
2655 * Zero on success, negative errno otherwise.
2658 int ata_bus_probe(struct ata_port *ap)
2660 unsigned int classes[ATA_MAX_DEVICES];
2661 int tries[ATA_MAX_DEVICES];
2663 struct ata_device *dev;
2667 ata_for_each_dev(dev, &ap->link, ALL)
2668 tries[dev->devno] = ATA_PROBE_MAX_TRIES;
2671 ata_for_each_dev(dev, &ap->link, ALL) {
2672 /* If we issue an SRST then an ATA drive (not ATAPI)
2673 * may change configuration and be in PIO0 timing. If
2674 * we do a hard reset (or are coming from power on)
2675 * this is true for ATA or ATAPI. Until we've set a
2676 * suitable controller mode we should not touch the
2677 * bus as we may be talking too fast.
2679 dev->pio_mode = XFER_PIO_0;
2681 /* If the controller has a pio mode setup function
2682 * then use it to set the chipset to rights. Don't
2683 * touch the DMA setup as that will be dealt with when
2684 * configuring devices.
2686 if (ap->ops->set_piomode)
2687 ap->ops->set_piomode(ap, dev);
2690 /* reset and determine device classes */
2691 ap->ops->phy_reset(ap);
2693 ata_for_each_dev(dev, &ap->link, ALL) {
2694 if (!(ap->flags & ATA_FLAG_DISABLED) &&
2695 dev->class != ATA_DEV_UNKNOWN)
2696 classes[dev->devno] = dev->class;
2698 classes[dev->devno] = ATA_DEV_NONE;
2700 dev->class = ATA_DEV_UNKNOWN;
2705 /* read IDENTIFY page and configure devices. We have to do the identify
2706 specific sequence bass-ackwards so that PDIAG- is released by
2709 ata_for_each_dev(dev, &ap->link, ALL_REVERSE) {
2710 if (tries[dev->devno])
2711 dev->class = classes[dev->devno];
2713 if (!ata_dev_enabled(dev))
2716 rc = ata_dev_read_id(dev, &dev->class, ATA_READID_POSTRESET,
2722 /* Now ask for the cable type as PDIAG- should have been released */
2723 if (ap->ops->cable_detect)
2724 ap->cbl = ap->ops->cable_detect(ap);
2726 /* We may have SATA bridge glue hiding here irrespective of
2727 * the reported cable types and sensed types. When SATA
2728 * drives indicate we have a bridge, we don't know which end
2729 * of the link the bridge is which is a problem.
2731 ata_for_each_dev(dev, &ap->link, ENABLED)
2732 if (ata_id_is_sata(dev->id))
2733 ap->cbl = ATA_CBL_SATA;
2735 /* After the identify sequence we can now set up the devices. We do
2736 this in the normal order so that the user doesn't get confused */
2738 ata_for_each_dev(dev, &ap->link, ENABLED) {
2739 ap->link.eh_context.i.flags |= ATA_EHI_PRINTINFO;
2740 rc = ata_dev_configure(dev);
2741 ap->link.eh_context.i.flags &= ~ATA_EHI_PRINTINFO;
2746 /* configure transfer mode */
2747 rc = ata_set_mode(&ap->link, &dev);
2751 ata_for_each_dev(dev, &ap->link, ENABLED)
2754 /* no device present, disable port */
2755 ata_port_disable(ap);
2759 tries[dev->devno]--;
2763 /* eeek, something went very wrong, give up */
2764 tries[dev->devno] = 0;
2768 /* give it just one more chance */
2769 tries[dev->devno] = min(tries[dev->devno], 1);
2771 if (tries[dev->devno] == 1) {
2772 /* This is the last chance, better to slow
2773 * down than lose it.
2775 sata_down_spd_limit(&ap->link);
2776 ata_down_xfermask_limit(dev, ATA_DNXFER_PIO);
2780 if (!tries[dev->devno])
2781 ata_dev_disable(dev);
2787 * ata_port_probe - Mark port as enabled
2788 * @ap: Port for which we indicate enablement
2790 * Modify @ap data structure such that the system
2791 * thinks that the entire port is enabled.
2793 * LOCKING: host lock, or some other form of
2797 void ata_port_probe(struct ata_port *ap)
2799 ap->flags &= ~ATA_FLAG_DISABLED;
2803 * sata_print_link_status - Print SATA link status
2804 * @link: SATA link to printk link status about
2806 * This function prints link speed and status of a SATA link.
2811 static void sata_print_link_status(struct ata_link *link)
2813 u32 sstatus, scontrol, tmp;
2815 if (sata_scr_read(link, SCR_STATUS, &sstatus))
2817 sata_scr_read(link, SCR_CONTROL, &scontrol);
2819 if (ata_phys_link_online(link)) {
2820 tmp = (sstatus >> 4) & 0xf;
2821 ata_link_printk(link, KERN_INFO,
2822 "SATA link up %s (SStatus %X SControl %X)\n",
2823 sata_spd_string(tmp), sstatus, scontrol);
2825 ata_link_printk(link, KERN_INFO,
2826 "SATA link down (SStatus %X SControl %X)\n",
2832 * ata_dev_pair - return other device on cable
2835 * Obtain the other device on the same cable, or if none is
2836 * present NULL is returned
2839 struct ata_device *ata_dev_pair(struct ata_device *adev)
2841 struct ata_link *link = adev->link;
2842 struct ata_device *pair = &link->device[1 - adev->devno];
2843 if (!ata_dev_enabled(pair))
2849 * ata_port_disable - Disable port.
2850 * @ap: Port to be disabled.
2852 * Modify @ap data structure such that the system
2853 * thinks that the entire port is disabled, and should
2854 * never attempt to probe or communicate with devices
2857 * LOCKING: host lock, or some other form of
2861 void ata_port_disable(struct ata_port *ap)
2863 ap->link.device[0].class = ATA_DEV_NONE;
2864 ap->link.device[1].class = ATA_DEV_NONE;
2865 ap->flags |= ATA_FLAG_DISABLED;
2869 * sata_down_spd_limit - adjust SATA spd limit downward
2870 * @link: Link to adjust SATA spd limit for
2872 * Adjust SATA spd limit of @link downward. Note that this
2873 * function only adjusts the limit. The change must be applied
2874 * using sata_set_spd().
2877 * Inherited from caller.
2880 * 0 on success, negative errno on failure
2882 int sata_down_spd_limit(struct ata_link *link)
2884 u32 sstatus, spd, mask;
2887 if (!sata_scr_valid(link))
2890 /* If SCR can be read, use it to determine the current SPD.
2891 * If not, use cached value in link->sata_spd.
2893 rc = sata_scr_read(link, SCR_STATUS, &sstatus);
2895 spd = (sstatus >> 4) & 0xf;
2897 spd = link->sata_spd;
2899 mask = link->sata_spd_limit;
2903 /* unconditionally mask off the highest bit */
2904 highbit = fls(mask) - 1;
2905 mask &= ~(1 << highbit);
2907 /* Mask off all speeds higher than or equal to the current
2908 * one. Force 1.5Gbps if current SPD is not available.
2911 mask &= (1 << (spd - 1)) - 1;
2915 /* were we already at the bottom? */
2919 link->sata_spd_limit = mask;
2921 ata_link_printk(link, KERN_WARNING, "limiting SATA link speed to %s\n",
2922 sata_spd_string(fls(mask)));
2927 static int __sata_set_spd_needed(struct ata_link *link, u32 *scontrol)
2929 struct ata_link *host_link = &link->ap->link;
2930 u32 limit, target, spd;
2932 limit = link->sata_spd_limit;
2934 /* Don't configure downstream link faster than upstream link.
2935 * It doesn't speed up anything and some PMPs choke on such
2938 if (!ata_is_host_link(link) && host_link->sata_spd)
2939 limit &= (1 << host_link->sata_spd) - 1;
2941 if (limit == UINT_MAX)
2944 target = fls(limit);
2946 spd = (*scontrol >> 4) & 0xf;
2947 *scontrol = (*scontrol & ~0xf0) | ((target & 0xf) << 4);
2949 return spd != target;
2953 * sata_set_spd_needed - is SATA spd configuration needed
2954 * @link: Link in question
2956 * Test whether the spd limit in SControl matches
2957 * @link->sata_spd_limit. This function is used to determine
2958 * whether hardreset is necessary to apply SATA spd
2962 * Inherited from caller.
2965 * 1 if SATA spd configuration is needed, 0 otherwise.
2967 static int sata_set_spd_needed(struct ata_link *link)
2971 if (sata_scr_read(link, SCR_CONTROL, &scontrol))
2974 return __sata_set_spd_needed(link, &scontrol);
2978 * sata_set_spd - set SATA spd according to spd limit
2979 * @link: Link to set SATA spd for
2981 * Set SATA spd of @link according to sata_spd_limit.
2984 * Inherited from caller.
2987 * 0 if spd doesn't need to be changed, 1 if spd has been
2988 * changed. Negative errno if SCR registers are inaccessible.
2990 int sata_set_spd(struct ata_link *link)
2995 if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
2998 if (!__sata_set_spd_needed(link, &scontrol))
3001 if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol)))
3008 * This mode timing computation functionality is ported over from
3009 * drivers/ide/ide-timing.h and was originally written by Vojtech Pavlik
3012 * PIO 0-4, MWDMA 0-2 and UDMA 0-6 timings (in nanoseconds).
3013 * These were taken from ATA/ATAPI-6 standard, rev 0a, except
3014 * for UDMA6, which is currently supported only by Maxtor drives.
3016 * For PIO 5/6 MWDMA 3/4 see the CFA specification 3.0.
3019 static const struct ata_timing ata_timing[] = {
3020 /* { XFER_PIO_SLOW, 120, 290, 240, 960, 290, 240, 0, 960, 0 }, */
3021 { XFER_PIO_0, 70, 290, 240, 600, 165, 150, 0, 600, 0 },
3022 { XFER_PIO_1, 50, 290, 93, 383, 125, 100, 0, 383, 0 },
3023 { XFER_PIO_2, 30, 290, 40, 330, 100, 90, 0, 240, 0 },
3024 { XFER_PIO_3, 30, 80, 70, 180, 80, 70, 0, 180, 0 },
3025 { XFER_PIO_4, 25, 70, 25, 120, 70, 25, 0, 120, 0 },
3026 { XFER_PIO_5, 15, 65, 25, 100, 65, 25, 0, 100, 0 },
3027 { XFER_PIO_6, 10, 55, 20, 80, 55, 20, 0, 80, 0 },
3029 { XFER_SW_DMA_0, 120, 0, 0, 0, 480, 480, 50, 960, 0 },
3030 { XFER_SW_DMA_1, 90, 0, 0, 0, 240, 240, 30, 480, 0 },
3031 { XFER_SW_DMA_2, 60, 0, 0, 0, 120, 120, 20, 240, 0 },
3033 { XFER_MW_DMA_0, 60, 0, 0, 0, 215, 215, 20, 480, 0 },
3034 { XFER_MW_DMA_1, 45, 0, 0, 0, 80, 50, 5, 150, 0 },
3035 { XFER_MW_DMA_2, 25, 0, 0, 0, 70, 25, 5, 120, 0 },
3036 { XFER_MW_DMA_3, 25, 0, 0, 0, 65, 25, 5, 100, 0 },
3037 { XFER_MW_DMA_4, 25, 0, 0, 0, 55, 20, 5, 80, 0 },
3039 /* { XFER_UDMA_SLOW, 0, 0, 0, 0, 0, 0, 0, 0, 150 }, */
3040 { XFER_UDMA_0, 0, 0, 0, 0, 0, 0, 0, 0, 120 },
3041 { XFER_UDMA_1, 0, 0, 0, 0, 0, 0, 0, 0, 80 },
3042 { XFER_UDMA_2, 0, 0, 0, 0, 0, 0, 0, 0, 60 },
3043 { XFER_UDMA_3, 0, 0, 0, 0, 0, 0, 0, 0, 45 },
3044 { XFER_UDMA_4, 0, 0, 0, 0, 0, 0, 0, 0, 30 },
3045 { XFER_UDMA_5, 0, 0, 0, 0, 0, 0, 0, 0, 20 },
3046 { XFER_UDMA_6, 0, 0, 0, 0, 0, 0, 0, 0, 15 },
3051 #define ENOUGH(v, unit) (((v)-1)/(unit)+1)
3052 #define EZ(v, unit) ((v)?ENOUGH(v, unit):0)
3054 static void ata_timing_quantize(const struct ata_timing *t, struct ata_timing *q, int T, int UT)
3056 q->setup = EZ(t->setup * 1000, T);
3057 q->act8b = EZ(t->act8b * 1000, T);
3058 q->rec8b = EZ(t->rec8b * 1000, T);
3059 q->cyc8b = EZ(t->cyc8b * 1000, T);
3060 q->active = EZ(t->active * 1000, T);
3061 q->recover = EZ(t->recover * 1000, T);
3062 q->dmack_hold = EZ(t->dmack_hold * 1000, T);
3063 q->cycle = EZ(t->cycle * 1000, T);
3064 q->udma = EZ(t->udma * 1000, UT);
3067 void ata_timing_merge(const struct ata_timing *a, const struct ata_timing *b,
3068 struct ata_timing *m, unsigned int what)
3070 if (what & ATA_TIMING_SETUP ) m->setup = max(a->setup, b->setup);
3071 if (what & ATA_TIMING_ACT8B ) m->act8b = max(a->act8b, b->act8b);
3072 if (what & ATA_TIMING_REC8B ) m->rec8b = max(a->rec8b, b->rec8b);
3073 if (what & ATA_TIMING_CYC8B ) m->cyc8b = max(a->cyc8b, b->cyc8b);
3074 if (what & ATA_TIMING_ACTIVE ) m->active = max(a->active, b->active);
3075 if (what & ATA_TIMING_RECOVER) m->recover = max(a->recover, b->recover);
3076 if (what & ATA_TIMING_DMACK_HOLD) m->dmack_hold = max(a->dmack_hold, b->dmack_hold);
3077 if (what & ATA_TIMING_CYCLE ) m->cycle = max(a->cycle, b->cycle);
3078 if (what & ATA_TIMING_UDMA ) m->udma = max(a->udma, b->udma);
3081 const struct ata_timing *ata_timing_find_mode(u8 xfer_mode)
3083 const struct ata_timing *t = ata_timing;
3085 while (xfer_mode > t->mode)
3088 if (xfer_mode == t->mode)
3093 int ata_timing_compute(struct ata_device *adev, unsigned short speed,
3094 struct ata_timing *t, int T, int UT)
3096 const struct ata_timing *s;
3097 struct ata_timing p;
3103 if (!(s = ata_timing_find_mode(speed)))
3106 memcpy(t, s, sizeof(*s));
3109 * If the drive is an EIDE drive, it can tell us it needs extended
3110 * PIO/MW_DMA cycle timing.
3113 if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE drive */
3114 memset(&p, 0, sizeof(p));
3115 if (speed >= XFER_PIO_0 && speed <= XFER_SW_DMA_0) {
3116 if (speed <= XFER_PIO_2) p.cycle = p.cyc8b = adev->id[ATA_ID_EIDE_PIO];
3117 else p.cycle = p.cyc8b = adev->id[ATA_ID_EIDE_PIO_IORDY];
3118 } else if (speed >= XFER_MW_DMA_0 && speed <= XFER_MW_DMA_2) {
3119 p.cycle = adev->id[ATA_ID_EIDE_DMA_MIN];
3121 ata_timing_merge(&p, t, t, ATA_TIMING_CYCLE | ATA_TIMING_CYC8B);
3125 * Convert the timing to bus clock counts.
3128 ata_timing_quantize(t, t, T, UT);
3131 * Even in DMA/UDMA modes we still use PIO access for IDENTIFY,
3132 * S.M.A.R.T * and some other commands. We have to ensure that the
3133 * DMA cycle timing is slower/equal than the fastest PIO timing.
3136 if (speed > XFER_PIO_6) {
3137 ata_timing_compute(adev, adev->pio_mode, &p, T, UT);
3138 ata_timing_merge(&p, t, t, ATA_TIMING_ALL);
3142 * Lengthen active & recovery time so that cycle time is correct.
3145 if (t->act8b + t->rec8b < t->cyc8b) {
3146 t->act8b += (t->cyc8b - (t->act8b + t->rec8b)) / 2;
3147 t->rec8b = t->cyc8b - t->act8b;
3150 if (t->active + t->recover < t->cycle) {
3151 t->active += (t->cycle - (t->active + t->recover)) / 2;
3152 t->recover = t->cycle - t->active;
3155 /* In a few cases quantisation may produce enough errors to
3156 leave t->cycle too low for the sum of active and recovery
3157 if so we must correct this */
3158 if (t->active + t->recover > t->cycle)
3159 t->cycle = t->active + t->recover;
3165 * ata_timing_cycle2mode - find xfer mode for the specified cycle duration
3166 * @xfer_shift: ATA_SHIFT_* value for transfer type to examine.
3167 * @cycle: cycle duration in ns
3169 * Return matching xfer mode for @cycle. The returned mode is of
3170 * the transfer type specified by @xfer_shift. If @cycle is too
3171 * slow for @xfer_shift, 0xff is returned. If @cycle is faster
3172 * than the fastest known mode, the fasted mode is returned.
3178 * Matching xfer_mode, 0xff if no match found.
3180 u8 ata_timing_cycle2mode(unsigned int xfer_shift, int cycle)
3182 u8 base_mode = 0xff, last_mode = 0xff;
3183 const struct ata_xfer_ent *ent;
3184 const struct ata_timing *t;
3186 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
3187 if (ent->shift == xfer_shift)
3188 base_mode = ent->base;
3190 for (t = ata_timing_find_mode(base_mode);
3191 t && ata_xfer_mode2shift(t->mode) == xfer_shift; t++) {
3192 unsigned short this_cycle;
3194 switch (xfer_shift) {
3196 case ATA_SHIFT_MWDMA:
3197 this_cycle = t->cycle;
3199 case ATA_SHIFT_UDMA:
3200 this_cycle = t->udma;
3206 if (cycle > this_cycle)
3209 last_mode = t->mode;
3216 * ata_down_xfermask_limit - adjust dev xfer masks downward
3217 * @dev: Device to adjust xfer masks
3218 * @sel: ATA_DNXFER_* selector
3220 * Adjust xfer masks of @dev downward. Note that this function
3221 * does not apply the change. Invoking ata_set_mode() afterwards
3222 * will apply the limit.
3225 * Inherited from caller.
3228 * 0 on success, negative errno on failure
3230 int ata_down_xfermask_limit(struct ata_device *dev, unsigned int sel)
3233 unsigned long orig_mask, xfer_mask;
3234 unsigned long pio_mask, mwdma_mask, udma_mask;
3237 quiet = !!(sel & ATA_DNXFER_QUIET);
3238 sel &= ~ATA_DNXFER_QUIET;
3240 xfer_mask = orig_mask = ata_pack_xfermask(dev->pio_mask,
3243 ata_unpack_xfermask(xfer_mask, &pio_mask, &mwdma_mask, &udma_mask);
3246 case ATA_DNXFER_PIO:
3247 highbit = fls(pio_mask) - 1;
3248 pio_mask &= ~(1 << highbit);
3251 case ATA_DNXFER_DMA:
3253 highbit = fls(udma_mask) - 1;
3254 udma_mask &= ~(1 << highbit);
3257 } else if (mwdma_mask) {
3258 highbit = fls(mwdma_mask) - 1;
3259 mwdma_mask &= ~(1 << highbit);
3265 case ATA_DNXFER_40C:
3266 udma_mask &= ATA_UDMA_MASK_40C;
3269 case ATA_DNXFER_FORCE_PIO0:
3271 case ATA_DNXFER_FORCE_PIO:
3280 xfer_mask &= ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask);
3282 if (!(xfer_mask & ATA_MASK_PIO) || xfer_mask == orig_mask)
3286 if (xfer_mask & (ATA_MASK_MWDMA | ATA_MASK_UDMA))
3287 snprintf(buf, sizeof(buf), "%s:%s",
3288 ata_mode_string(xfer_mask),
3289 ata_mode_string(xfer_mask & ATA_MASK_PIO));
3291 snprintf(buf, sizeof(buf), "%s",
3292 ata_mode_string(xfer_mask));
3294 ata_dev_printk(dev, KERN_WARNING,
3295 "limiting speed to %s\n", buf);
3298 ata_unpack_xfermask(xfer_mask, &dev->pio_mask, &dev->mwdma_mask,
3304 static int ata_dev_set_mode(struct ata_device *dev)
3306 struct ata_eh_context *ehc = &dev->link->eh_context;
3307 const char *dev_err_whine = "";
3308 int ign_dev_err = 0;
3309 unsigned int err_mask;
3312 dev->flags &= ~ATA_DFLAG_PIO;
3313 if (dev->xfer_shift == ATA_SHIFT_PIO)
3314 dev->flags |= ATA_DFLAG_PIO;
3316 err_mask = ata_dev_set_xfermode(dev);
3318 if (err_mask & ~AC_ERR_DEV)
3322 ehc->i.flags |= ATA_EHI_POST_SETMODE;
3323 rc = ata_dev_revalidate(dev, ATA_DEV_UNKNOWN, 0);
3324 ehc->i.flags &= ~ATA_EHI_POST_SETMODE;
3328 if (dev->xfer_shift == ATA_SHIFT_PIO) {
3329 /* Old CFA may refuse this command, which is just fine */
3330 if (ata_id_is_cfa(dev->id))
3332 /* Catch several broken garbage emulations plus some pre
3334 if (ata_id_major_version(dev->id) == 0 &&
3335 dev->pio_mode <= XFER_PIO_2)
3337 /* Some very old devices and some bad newer ones fail
3338 any kind of SET_XFERMODE request but support PIO0-2
3339 timings and no IORDY */
3340 if (!ata_id_has_iordy(dev->id) && dev->pio_mode <= XFER_PIO_2)
3343 /* Early MWDMA devices do DMA but don't allow DMA mode setting.
3344 Don't fail an MWDMA0 set IFF the device indicates it is in MWDMA0 */
3345 if (dev->xfer_shift == ATA_SHIFT_MWDMA &&
3346 dev->dma_mode == XFER_MW_DMA_0 &&
3347 (dev->id[63] >> 8) & 1)
3350 /* if the device is actually configured correctly, ignore dev err */
3351 if (dev->xfer_mode == ata_xfer_mask2mode(ata_id_xfermask(dev->id)))
3354 if (err_mask & AC_ERR_DEV) {
3358 dev_err_whine = " (device error ignored)";
3361 DPRINTK("xfer_shift=%u, xfer_mode=0x%x\n",
3362 dev->xfer_shift, (int)dev->xfer_mode);
3364 ata_dev_printk(dev, KERN_INFO, "configured for %s%s\n",
3365 ata_mode_string(ata_xfer_mode2mask(dev->xfer_mode)),
3371 ata_dev_printk(dev, KERN_ERR, "failed to set xfermode "
3372 "(err_mask=0x%x)\n", err_mask);
3377 * ata_do_set_mode - Program timings and issue SET FEATURES - XFER
3378 * @link: link on which timings will be programmed
3379 * @r_failed_dev: out parameter for failed device
3381 * Standard implementation of the function used to tune and set
3382 * ATA device disk transfer mode (PIO3, UDMA6, etc.). If
3383 * ata_dev_set_mode() fails, pointer to the failing device is
3384 * returned in @r_failed_dev.
3387 * PCI/etc. bus probe sem.
3390 * 0 on success, negative errno otherwise
3393 int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev)
3395 struct ata_port *ap = link->ap;
3396 struct ata_device *dev;
3397 int rc = 0, used_dma = 0, found = 0;
3399 /* step 1: calculate xfer_mask */
3400 ata_for_each_dev(dev, link, ENABLED) {
3401 unsigned long pio_mask, dma_mask;
3402 unsigned int mode_mask;
3404 mode_mask = ATA_DMA_MASK_ATA;
3405 if (dev->class == ATA_DEV_ATAPI)
3406 mode_mask = ATA_DMA_MASK_ATAPI;
3407 else if (ata_id_is_cfa(dev->id))
3408 mode_mask = ATA_DMA_MASK_CFA;
3410 ata_dev_xfermask(dev);
3411 ata_force_xfermask(dev);
3413 pio_mask = ata_pack_xfermask(dev->pio_mask, 0, 0);
3414 dma_mask = ata_pack_xfermask(0, dev->mwdma_mask, dev->udma_mask);
3416 if (libata_dma_mask & mode_mask)
3417 dma_mask = ata_pack_xfermask(0, dev->mwdma_mask, dev->udma_mask);
3421 dev->pio_mode = ata_xfer_mask2mode(pio_mask);
3422 dev->dma_mode = ata_xfer_mask2mode(dma_mask);
3425 if (ata_dma_enabled(dev))
3431 /* step 2: always set host PIO timings */
3432 ata_for_each_dev(dev, link, ENABLED) {
3433 if (dev->pio_mode == 0xff) {
3434 ata_dev_printk(dev, KERN_WARNING, "no PIO support\n");
3439 dev->xfer_mode = dev->pio_mode;
3440 dev->xfer_shift = ATA_SHIFT_PIO;
3441 if (ap->ops->set_piomode)
3442 ap->ops->set_piomode(ap, dev);
3445 /* step 3: set host DMA timings */
3446 ata_for_each_dev(dev, link, ENABLED) {
3447 if (!ata_dma_enabled(dev))
3450 dev->xfer_mode = dev->dma_mode;
3451 dev->xfer_shift = ata_xfer_mode2shift(dev->dma_mode);
3452 if (ap->ops->set_dmamode)
3453 ap->ops->set_dmamode(ap, dev);
3456 /* step 4: update devices' xfer mode */
3457 ata_for_each_dev(dev, link, ENABLED) {
3458 rc = ata_dev_set_mode(dev);
3463 /* Record simplex status. If we selected DMA then the other
3464 * host channels are not permitted to do so.
3466 if (used_dma && (ap->host->flags & ATA_HOST_SIMPLEX))
3467 ap->host->simplex_claimed = ap;
3471 *r_failed_dev = dev;
3476 * ata_wait_ready - wait for link to become ready
3477 * @link: link to be waited on
3478 * @deadline: deadline jiffies for the operation
3479 * @check_ready: callback to check link readiness
3481 * Wait for @link to become ready. @check_ready should return
3482 * positive number if @link is ready, 0 if it isn't, -ENODEV if
3483 * link doesn't seem to be occupied, other errno for other error
3486 * Transient -ENODEV conditions are allowed for
3487 * ATA_TMOUT_FF_WAIT.
3493 * 0 if @linke is ready before @deadline; otherwise, -errno.
3495 int ata_wait_ready(struct ata_link *link, unsigned long deadline,
3496 int (*check_ready)(struct ata_link *link))
3498 unsigned long start = jiffies;
3499 unsigned long nodev_deadline = ata_deadline(start, ATA_TMOUT_FF_WAIT);
3502 /* Slave readiness can't be tested separately from master. On
3503 * M/S emulation configuration, this function should be called
3504 * only on the master and it will handle both master and slave.
3506 WARN_ON(link == link->ap->slave_link);
3508 if (time_after(nodev_deadline, deadline))
3509 nodev_deadline = deadline;
3512 unsigned long now = jiffies;
3515 ready = tmp = check_ready(link);
3519 /* -ENODEV could be transient. Ignore -ENODEV if link
3520 * is online. Also, some SATA devices take a long
3521 * time to clear 0xff after reset. For example,
3522 * HHD424020F7SV00 iVDR needs >= 800ms while Quantum
3523 * GoVault needs even more than that. Wait for
3524 * ATA_TMOUT_FF_WAIT on -ENODEV if link isn't offline.
3526 * Note that some PATA controllers (pata_ali) explode
3527 * if status register is read more than once when
3528 * there's no device attached.
3530 if (ready == -ENODEV) {
3531 if (ata_link_online(link))
3533 else if ((link->ap->flags & ATA_FLAG_SATA) &&
3534 !ata_link_offline(link) &&
3535 time_before(now, nodev_deadline))
3541 if (time_after(now, deadline))
3544 if (!warned && time_after(now, start + 5 * HZ) &&
3545 (deadline - now > 3 * HZ)) {
3546 ata_link_printk(link, KERN_WARNING,
3547 "link is slow to respond, please be patient "
3548 "(ready=%d)\n", tmp);
3557 * ata_wait_after_reset - wait for link to become ready after reset
3558 * @link: link to be waited on
3559 * @deadline: deadline jiffies for the operation
3560 * @check_ready: callback to check link readiness
3562 * Wait for @link to become ready after reset.
3568 * 0 if @linke is ready before @deadline; otherwise, -errno.
3570 int ata_wait_after_reset(struct ata_link *link, unsigned long deadline,
3571 int (*check_ready)(struct ata_link *link))
3573 msleep(ATA_WAIT_AFTER_RESET);
3575 return ata_wait_ready(link, deadline, check_ready);
3579 * sata_link_debounce - debounce SATA phy status
3580 * @link: ATA link to debounce SATA phy status for
3581 * @params: timing parameters { interval, duratinon, timeout } in msec
3582 * @deadline: deadline jiffies for the operation
3584 * Make sure SStatus of @link reaches stable state, determined by
3585 * holding the same value where DET is not 1 for @duration polled
3586 * every @interval, before @timeout. Timeout constraints the
3587 * beginning of the stable state. Because DET gets stuck at 1 on
3588 * some controllers after hot unplugging, this functions waits
3589 * until timeout then returns 0 if DET is stable at 1.
3591 * @timeout is further limited by @deadline. The sooner of the
3595 * Kernel thread context (may sleep)
3598 * 0 on success, -errno on failure.
3600 int sata_link_debounce(struct ata_link *link, const unsigned long *params,
3601 unsigned long deadline)
3603 unsigned long interval = params[0];
3604 unsigned long duration = params[1];
3605 unsigned long last_jiffies, t;
3609 t = ata_deadline(jiffies, params[2]);
3610 if (time_before(t, deadline))
3613 if ((rc = sata_scr_read(link, SCR_STATUS, &cur)))
3618 last_jiffies = jiffies;
3622 if ((rc = sata_scr_read(link, SCR_STATUS, &cur)))
3628 if (cur == 1 && time_before(jiffies, deadline))
3630 if (time_after(jiffies,
3631 ata_deadline(last_jiffies, duration)))
3636 /* unstable, start over */
3638 last_jiffies = jiffies;
3640 /* Check deadline. If debouncing failed, return
3641 * -EPIPE to tell upper layer to lower link speed.
3643 if (time_after(jiffies, deadline))
3649 * sata_link_resume - resume SATA link
3650 * @link: ATA link to resume SATA
3651 * @params: timing parameters { interval, duratinon, timeout } in msec
3652 * @deadline: deadline jiffies for the operation
3654 * Resume SATA phy @link and debounce it.
3657 * Kernel thread context (may sleep)
3660 * 0 on success, -errno on failure.
3662 int sata_link_resume(struct ata_link *link, const unsigned long *params,
3663 unsigned long deadline)
3665 u32 scontrol, serror;
3668 if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
3671 scontrol = (scontrol & 0x0f0) | 0x300;
3673 if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol)))
3676 /* Some PHYs react badly if SStatus is pounded immediately
3677 * after resuming. Delay 200ms before debouncing.
3681 if ((rc = sata_link_debounce(link, params, deadline)))
3684 /* clear SError, some PHYs require this even for SRST to work */
3685 if (!(rc = sata_scr_read(link, SCR_ERROR, &serror)))
3686 rc = sata_scr_write(link, SCR_ERROR, serror);
3688 return rc != -EINVAL ? rc : 0;
3692 * ata_std_prereset - prepare for reset
3693 * @link: ATA link to be reset
3694 * @deadline: deadline jiffies for the operation
3696 * @link is about to be reset. Initialize it. Failure from
3697 * prereset makes libata abort whole reset sequence and give up
3698 * that port, so prereset should be best-effort. It does its
3699 * best to prepare for reset sequence but if things go wrong, it
3700 * should just whine, not fail.
3703 * Kernel thread context (may sleep)
3706 * 0 on success, -errno otherwise.
3708 int ata_std_prereset(struct ata_link *link, unsigned long deadline)
3710 struct ata_port *ap = link->ap;
3711 struct ata_eh_context *ehc = &link->eh_context;
3712 const unsigned long *timing = sata_ehc_deb_timing(ehc);
3715 /* if we're about to do hardreset, nothing more to do */
3716 if (ehc->i.action & ATA_EH_HARDRESET)
3719 /* if SATA, resume link */
3720 if (ap->flags & ATA_FLAG_SATA) {
3721 rc = sata_link_resume(link, timing, deadline);
3722 /* whine about phy resume failure but proceed */
3723 if (rc && rc != -EOPNOTSUPP)
3724 ata_link_printk(link, KERN_WARNING, "failed to resume "
3725 "link for reset (errno=%d)\n", rc);
3728 /* no point in trying softreset on offline link */
3729 if (ata_phys_link_offline(link))
3730 ehc->i.action &= ~ATA_EH_SOFTRESET;
3736 * sata_link_hardreset - reset link via SATA phy reset
3737 * @link: link to reset
3738 * @timing: timing parameters { interval, duratinon, timeout } in msec
3739 * @deadline: deadline jiffies for the operation
3740 * @online: optional out parameter indicating link onlineness
3741 * @check_ready: optional callback to check link readiness
3743 * SATA phy-reset @link using DET bits of SControl register.
3744 * After hardreset, link readiness is waited upon using
3745 * ata_wait_ready() if @check_ready is specified. LLDs are
3746 * allowed to not specify @check_ready and wait itself after this
3747 * function returns. Device classification is LLD's
3750 * *@online is set to one iff reset succeeded and @link is online
3754 * Kernel thread context (may sleep)
3757 * 0 on success, -errno otherwise.
3759 int sata_link_hardreset(struct ata_link *link, const unsigned long *timing,
3760 unsigned long deadline,
3761 bool *online, int (*check_ready)(struct ata_link *))
3771 if (sata_set_spd_needed(link)) {
3772 /* SATA spec says nothing about how to reconfigure
3773 * spd. To be on the safe side, turn off phy during
3774 * reconfiguration. This works for at least ICH7 AHCI
3777 if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
3780 scontrol = (scontrol & 0x0f0) | 0x304;
3782 if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol)))
3788 /* issue phy wake/reset */
3789 if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
3792 scontrol = (scontrol & 0x0f0) | 0x301;
3794 if ((rc = sata_scr_write_flush(link, SCR_CONTROL, scontrol)))
3797 /* Couldn't find anything in SATA I/II specs, but AHCI-1.1
3798 * 10.4.2 says at least 1 ms.
3802 /* bring link back */
3803 rc = sata_link_resume(link, timing, deadline);
3806 /* if link is offline nothing more to do */
3807 if (ata_phys_link_offline(link))
3810 /* Link is online. From this point, -ENODEV too is an error. */
3814 if (sata_pmp_supported(link->ap) && ata_is_host_link(link)) {
3815 /* If PMP is supported, we have to do follow-up SRST.
3816 * Some PMPs don't send D2H Reg FIS after hardreset if
3817 * the first port is empty. Wait only for
3818 * ATA_TMOUT_PMP_SRST_WAIT.
3821 unsigned long pmp_deadline;
3823 pmp_deadline = ata_deadline(jiffies,
3824 ATA_TMOUT_PMP_SRST_WAIT);
3825 if (time_after(pmp_deadline, deadline))
3826 pmp_deadline = deadline;
3827 ata_wait_ready(link, pmp_deadline, check_ready);
3835 rc = ata_wait_ready(link, deadline, check_ready);
3837 if (rc && rc != -EAGAIN) {
3838 /* online is set iff link is online && reset succeeded */
3841 ata_link_printk(link, KERN_ERR,
3842 "COMRESET failed (errno=%d)\n", rc);
3844 DPRINTK("EXIT, rc=%d\n", rc);
3849 * sata_std_hardreset - COMRESET w/o waiting or classification
3850 * @link: link to reset
3851 * @class: resulting class of attached device
3852 * @deadline: deadline jiffies for the operation
3854 * Standard SATA COMRESET w/o waiting or classification.
3857 * Kernel thread context (may sleep)
3860 * 0 if link offline, -EAGAIN if link online, -errno on errors.
3862 int sata_std_hardreset(struct ata_link *link, unsigned int *class,
3863 unsigned long deadline)
3865 const unsigned long *timing = sata_ehc_deb_timing(&link->eh_context);
3870 rc = sata_link_hardreset(link, timing, deadline, &online, NULL);
3871 return online ? -EAGAIN : rc;
3875 * ata_std_postreset - standard postreset callback
3876 * @link: the target ata_link
3877 * @classes: classes of attached devices
3879 * This function is invoked after a successful reset. Note that
3880 * the device might have been reset more than once using
3881 * different reset methods before postreset is invoked.
3884 * Kernel thread context (may sleep)
3886 void ata_std_postreset(struct ata_link *link, unsigned int *classes)
3892 /* reset complete, clear SError */
3893 if (!sata_scr_read(link, SCR_ERROR, &serror))
3894 sata_scr_write(link, SCR_ERROR, serror);
3896 /* print link status */
3897 sata_print_link_status(link);
3903 * ata_dev_same_device - Determine whether new ID matches configured device
3904 * @dev: device to compare against
3905 * @new_class: class of the new device
3906 * @new_id: IDENTIFY page of the new device
3908 * Compare @new_class and @new_id against @dev and determine
3909 * whether @dev is the device indicated by @new_class and
3916 * 1 if @dev matches @new_class and @new_id, 0 otherwise.
3918 static int ata_dev_same_device(struct ata_device *dev, unsigned int new_class,
3921 const u16 *old_id = dev->id;
3922 unsigned char model[2][ATA_ID_PROD_LEN + 1];
3923 unsigned char serial[2][ATA_ID_SERNO_LEN + 1];
3925 if (dev->class != new_class) {
3926 ata_dev_printk(dev, KERN_INFO, "class mismatch %d != %d\n",
3927 dev->class, new_class);
3931 ata_id_c_string(old_id, model[0], ATA_ID_PROD, sizeof(model[0]));
3932 ata_id_c_string(new_id, model[1], ATA_ID_PROD, sizeof(model[1]));
3933 ata_id_c_string(old_id, serial[0], ATA_ID_SERNO, sizeof(serial[0]));
3934 ata_id_c_string(new_id, serial[1], ATA_ID_SERNO, sizeof(serial[1]));
3936 if (strcmp(model[0], model[1])) {
3937 ata_dev_printk(dev, KERN_INFO, "model number mismatch "
3938 "'%s' != '%s'\n", model[0], model[1]);
3942 if (strcmp(serial[0], serial[1])) {
3943 ata_dev_printk(dev, KERN_INFO, "serial number mismatch "
3944 "'%s' != '%s'\n", serial[0], serial[1]);
3952 * ata_dev_reread_id - Re-read IDENTIFY data
3953 * @dev: target ATA device
3954 * @readid_flags: read ID flags
3956 * Re-read IDENTIFY page and make sure @dev is still attached to
3960 * Kernel thread context (may sleep)
3963 * 0 on success, negative errno otherwise
3965 int ata_dev_reread_id(struct ata_device *dev, unsigned int readid_flags)
3967 unsigned int class = dev->class;
3968 u16 *id = (void *)dev->link->ap->sector_buf;
3972 rc = ata_dev_read_id(dev, &class, readid_flags, id);
3976 /* is the device still there? */
3977 if (!ata_dev_same_device(dev, class, id))
3980 memcpy(dev->id, id, sizeof(id[0]) * ATA_ID_WORDS);
3985 * ata_dev_revalidate - Revalidate ATA device
3986 * @dev: device to revalidate
3987 * @new_class: new class code
3988 * @readid_flags: read ID flags
3990 * Re-read IDENTIFY page, make sure @dev is still attached to the
3991 * port and reconfigure it according to the new IDENTIFY page.
3994 * Kernel thread context (may sleep)
3997 * 0 on success, negative errno otherwise
3999 int ata_dev_revalidate(struct ata_device *dev, unsigned int new_class,
4000 unsigned int readid_flags)
4002 u64 n_sectors = dev->n_sectors;
4005 if (!ata_dev_enabled(dev))
4008 /* fail early if !ATA && !ATAPI to avoid issuing [P]IDENTIFY to PMP */
4009 if (ata_class_enabled(new_class) &&
4010 new_class != ATA_DEV_ATA && new_class != ATA_DEV_ATAPI) {
4011 ata_dev_printk(dev, KERN_INFO, "class mismatch %u != %u\n",
4012 dev->class, new_class);
4018 rc = ata_dev_reread_id(dev, readid_flags);
4022 /* configure device according to the new ID */
4023 rc = ata_dev_configure(dev);
4027 /* verify n_sectors hasn't changed */
4028 if (dev->class == ATA_DEV_ATA && n_sectors &&
4029 dev->n_sectors != n_sectors) {
4030 ata_dev_printk(dev, KERN_INFO, "n_sectors mismatch "
4032 (unsigned long long)n_sectors,
4033 (unsigned long long)dev->n_sectors);
4035 /* restore original n_sectors */
4036 dev->n_sectors = n_sectors;
4045 ata_dev_printk(dev, KERN_ERR, "revalidation failed (errno=%d)\n", rc);
4049 struct ata_blacklist_entry {
4050 const char *model_num;
4051 const char *model_rev;
4052 unsigned long horkage;
4055 static const struct ata_blacklist_entry ata_device_blacklist [] = {
4056 /* Devices with DMA related problems under Linux */
4057 { "WDC AC11000H", NULL, ATA_HORKAGE_NODMA },
4058 { "WDC AC22100H", NULL, ATA_HORKAGE_NODMA },
4059 { "WDC AC32500H", NULL, ATA_HORKAGE_NODMA },
4060 { "WDC AC33100H", NULL, ATA_HORKAGE_NODMA },
4061 { "WDC AC31600H", NULL, ATA_HORKAGE_NODMA },
4062 { "WDC AC32100H", "24.09P07", ATA_HORKAGE_NODMA },
4063 { "WDC AC23200L", "21.10N21", ATA_HORKAGE_NODMA },
4064 { "Compaq CRD-8241B", NULL, ATA_HORKAGE_NODMA },
4065 { "CRD-8400B", NULL, ATA_HORKAGE_NODMA },
4066 { "CRD-8480B", NULL, ATA_HORKAGE_NODMA },
4067 { "CRD-8482B", NULL, ATA_HORKAGE_NODMA },
4068 { "CRD-84", NULL, ATA_HORKAGE_NODMA },
4069 { "SanDisk SDP3B", NULL, ATA_HORKAGE_NODMA },
4070 { "SanDisk SDP3B-64", NULL, ATA_HORKAGE_NODMA },
4071 { "SANYO CD-ROM CRD", NULL, ATA_HORKAGE_NODMA },
4072 { "HITACHI CDR-8", NULL, ATA_HORKAGE_NODMA },
4073 { "HITACHI CDR-8335", NULL, ATA_HORKAGE_NODMA },
4074 { "HITACHI CDR-8435", NULL, ATA_HORKAGE_NODMA },
4075 { "Toshiba CD-ROM XM-6202B", NULL, ATA_HORKAGE_NODMA },
4076 { "TOSHIBA CD-ROM XM-1702BC", NULL, ATA_HORKAGE_NODMA },
4077 { "CD-532E-A", NULL, ATA_HORKAGE_NODMA },
4078 { "E-IDE CD-ROM CR-840",NULL, ATA_HORKAGE_NODMA },
4079 { "CD-ROM Drive/F5A", NULL, ATA_HORKAGE_NODMA },
4080 { "WPI CDD-820", NULL, ATA_HORKAGE_NODMA },
4081 { "SAMSUNG CD-ROM SC-148C", NULL, ATA_HORKAGE_NODMA },
4082 { "SAMSUNG CD-ROM SC", NULL, ATA_HORKAGE_NODMA },
4083 { "ATAPI CD-ROM DRIVE 40X MAXIMUM",NULL,ATA_HORKAGE_NODMA },
4084 { "_NEC DV5800A", NULL, ATA_HORKAGE_NODMA },
4085 { "SAMSUNG CD-ROM SN-124", "N001", ATA_HORKAGE_NODMA },
4086 { "Seagate STT20000A", NULL, ATA_HORKAGE_NODMA },
4087 /* Odd clown on sil3726/4726 PMPs */
4088 { "Config Disk", NULL, ATA_HORKAGE_DISABLE },
4090 /* Weird ATAPI devices */
4091 { "TORiSAN DVD-ROM DRD-N216", NULL, ATA_HORKAGE_MAX_SEC_128 },
4092 { "QUANTUM DAT DAT72-000", NULL, ATA_HORKAGE_ATAPI_MOD16_DMA },
4094 /* Devices we expect to fail diagnostics */
4096 /* Devices where NCQ should be avoided */
4098 { "WDC WD740ADFD-00", NULL, ATA_HORKAGE_NONCQ },
4099 { "WDC WD740ADFD-00NLR1", NULL, ATA_HORKAGE_NONCQ, },
4100 /* http://thread.gmane.org/gmane.linux.ide/14907 */
4101 { "FUJITSU MHT2060BH", NULL, ATA_HORKAGE_NONCQ },
4103 { "Maxtor *", "BANC*", ATA_HORKAGE_NONCQ },
4104 { "Maxtor 7V300F0", "VA111630", ATA_HORKAGE_NONCQ },
4105 { "ST380817AS", "3.42", ATA_HORKAGE_NONCQ },
4106 { "ST3160023AS", "3.42", ATA_HORKAGE_NONCQ },
4107 { "OCZ CORE_SSD", "02.10104", ATA_HORKAGE_NONCQ },
4109 /* Seagate NCQ + FLUSH CACHE firmware bug */
4110 { "ST31500341AS", "SD15", ATA_HORKAGE_NONCQ |
4111 ATA_HORKAGE_FIRMWARE_WARN },
4112 { "ST31500341AS", "SD16", ATA_HORKAGE_NONCQ |
4113 ATA_HORKAGE_FIRMWARE_WARN },
4114 { "ST31500341AS", "SD17", ATA_HORKAGE_NONCQ |
4115 ATA_HORKAGE_FIRMWARE_WARN },
4116 { "ST31500341AS", "SD18", ATA_HORKAGE_NONCQ |
4117 ATA_HORKAGE_FIRMWARE_WARN },
4118 { "ST31500341AS", "SD19", ATA_HORKAGE_NONCQ |
4119 ATA_HORKAGE_FIRMWARE_WARN },
4121 { "ST31000333AS", "SD15", ATA_HORKAGE_NONCQ |
4122 ATA_HORKAGE_FIRMWARE_WARN },
4123 { "ST31000333AS", "SD16", ATA_HORKAGE_NONCQ |
4124 ATA_HORKAGE_FIRMWARE_WARN },
4125 { "ST31000333AS", "SD17", ATA_HORKAGE_NONCQ |
4126 ATA_HORKAGE_FIRMWARE_WARN },
4127 { "ST31000333AS", "SD18", ATA_HORKAGE_NONCQ |
4128 ATA_HORKAGE_FIRMWARE_WARN },
4129 { "ST31000333AS", "SD19", ATA_HORKAGE_NONCQ |
4130 ATA_HORKAGE_FIRMWARE_WARN },
4132 { "ST3640623AS", "SD15", ATA_HORKAGE_NONCQ |
4133 ATA_HORKAGE_FIRMWARE_WARN },
4134 { "ST3640623AS", "SD16", ATA_HORKAGE_NONCQ |
4135 ATA_HORKAGE_FIRMWARE_WARN },
4136 { "ST3640623AS", "SD17", ATA_HORKAGE_NONCQ |
4137 ATA_HORKAGE_FIRMWARE_WARN },
4138 { "ST3640623AS", "SD18", ATA_HORKAGE_NONCQ |
4139 ATA_HORKAGE_FIRMWARE_WARN },
4140 { "ST3640623AS", "SD19", ATA_HORKAGE_NONCQ |
4141 ATA_HORKAGE_FIRMWARE_WARN },
4143 { "ST3640323AS", "SD15", ATA_HORKAGE_NONCQ |
4144 ATA_HORKAGE_FIRMWARE_WARN },
4145 { "ST3640323AS", "SD16", ATA_HORKAGE_NONCQ |
4146 ATA_HORKAGE_FIRMWARE_WARN },
4147 { "ST3640323AS", "SD17", ATA_HORKAGE_NONCQ |
4148 ATA_HORKAGE_FIRMWARE_WARN },
4149 { "ST3640323AS", "SD18", ATA_HORKAGE_NONCQ |
4150 ATA_HORKAGE_FIRMWARE_WARN },
4151 { "ST3640323AS", "SD19", ATA_HORKAGE_NONCQ |
4152 ATA_HORKAGE_FIRMWARE_WARN },
4154 { "ST3320813AS", "SD15", ATA_HORKAGE_NONCQ |
4155 ATA_HORKAGE_FIRMWARE_WARN },
4156 { "ST3320813AS", "SD16", ATA_HORKAGE_NONCQ |
4157 ATA_HORKAGE_FIRMWARE_WARN },
4158 { "ST3320813AS", "SD17", ATA_HORKAGE_NONCQ |
4159 ATA_HORKAGE_FIRMWARE_WARN },
4160 { "ST3320813AS", "SD18", ATA_HORKAGE_NONCQ |
4161 ATA_HORKAGE_FIRMWARE_WARN },
4162 { "ST3320813AS", "SD19", ATA_HORKAGE_NONCQ |
4163 ATA_HORKAGE_FIRMWARE_WARN },
4165 { "ST3320613AS", "SD15", ATA_HORKAGE_NONCQ |
4166 ATA_HORKAGE_FIRMWARE_WARN },
4167 { "ST3320613AS", "SD16", ATA_HORKAGE_NONCQ |
4168 ATA_HORKAGE_FIRMWARE_WARN },
4169 { "ST3320613AS", "SD17", ATA_HORKAGE_NONCQ |
4170 ATA_HORKAGE_FIRMWARE_WARN },
4171 { "ST3320613AS", "SD18", ATA_HORKAGE_NONCQ |
4172 ATA_HORKAGE_FIRMWARE_WARN },
4173 { "ST3320613AS", "SD19", ATA_HORKAGE_NONCQ |
4174 ATA_HORKAGE_FIRMWARE_WARN },
4176 /* Blacklist entries taken from Silicon Image 3124/3132
4177 Windows driver .inf file - also several Linux problem reports */
4178 { "HTS541060G9SA00", "MB3OC60D", ATA_HORKAGE_NONCQ, },
4179 { "HTS541080G9SA00", "MB4OC60D", ATA_HORKAGE_NONCQ, },
4180 { "HTS541010G9SA00", "MBZOC60D", ATA_HORKAGE_NONCQ, },
4182 /* devices which puke on READ_NATIVE_MAX */
4183 { "HDS724040KLSA80", "KFAOA20N", ATA_HORKAGE_BROKEN_HPA, },
4184 { "WDC WD3200JD-00KLB0", "WD-WCAMR1130137", ATA_HORKAGE_BROKEN_HPA },
4185 { "WDC WD2500JD-00HBB0", "WD-WMAL71490727", ATA_HORKAGE_BROKEN_HPA },
4186 { "MAXTOR 6L080L4", "A93.0500", ATA_HORKAGE_BROKEN_HPA },
4188 /* Devices which report 1 sector over size HPA */
4189 { "ST340823A", NULL, ATA_HORKAGE_HPA_SIZE, },
4190 { "ST320413A", NULL, ATA_HORKAGE_HPA_SIZE, },
4191 { "ST310211A", NULL, ATA_HORKAGE_HPA_SIZE, },
4193 /* Devices which get the IVB wrong */
4194 { "QUANTUM FIREBALLlct10 05", "A03.0900", ATA_HORKAGE_IVB, },
4195 /* Maybe we should just blacklist TSSTcorp... */
4196 { "TSSTcorp CDDVDW SH-S202H", "SB00", ATA_HORKAGE_IVB, },
4197 { "TSSTcorp CDDVDW SH-S202H", "SB01", ATA_HORKAGE_IVB, },
4198 { "TSSTcorp CDDVDW SH-S202J", "SB00", ATA_HORKAGE_IVB, },
4199 { "TSSTcorp CDDVDW SH-S202J", "SB01", ATA_HORKAGE_IVB, },
4200 { "TSSTcorp CDDVDW SH-S202N", "SB00", ATA_HORKAGE_IVB, },
4201 { "TSSTcorp CDDVDW SH-S202N", "SB01", ATA_HORKAGE_IVB, },
4203 /* Devices that do not need bridging limits applied */
4204 { "MTRON MSP-SATA*", NULL, ATA_HORKAGE_BRIDGE_OK, },
4210 static int strn_pattern_cmp(const char *patt, const char *name, int wildchar)
4216 * check for trailing wildcard: *\0
4218 p = strchr(patt, wildchar);
4219 if (p && ((*(p + 1)) == 0))
4230 return strncmp(patt, name, len);
4233 static unsigned long ata_dev_blacklisted(const struct ata_device *dev)
4235 unsigned char model_num[ATA_ID_PROD_LEN + 1];
4236 unsigned char model_rev[ATA_ID_FW_REV_LEN + 1];
4237 const struct ata_blacklist_entry *ad = ata_device_blacklist;
4239 ata_id_c_string(dev->id, model_num, ATA_ID_PROD, sizeof(model_num));
4240 ata_id_c_string(dev->id, model_rev, ATA_ID_FW_REV, sizeof(model_rev));
4242 while (ad->model_num) {
4243 if (!strn_pattern_cmp(ad->model_num, model_num, '*')) {
4244 if (ad->model_rev == NULL)
4246 if (!strn_pattern_cmp(ad->model_rev, model_rev, '*'))
4254 static int ata_dma_blacklisted(const struct ata_device *dev)
4256 /* We don't support polling DMA.
4257 * DMA blacklist those ATAPI devices with CDB-intr (and use PIO)
4258 * if the LLDD handles only interrupts in the HSM_ST_LAST state.
4260 if ((dev->link->ap->flags & ATA_FLAG_PIO_POLLING) &&
4261 (dev->flags & ATA_DFLAG_CDB_INTR))
4263 return (dev->horkage & ATA_HORKAGE_NODMA) ? 1 : 0;
4267 * ata_is_40wire - check drive side detection
4270 * Perform drive side detection decoding, allowing for device vendors
4271 * who can't follow the documentation.
4274 static int ata_is_40wire(struct ata_device *dev)
4276 if (dev->horkage & ATA_HORKAGE_IVB)
4277 return ata_drive_40wire_relaxed(dev->id);
4278 return ata_drive_40wire(dev->id);
4282 * cable_is_40wire - 40/80/SATA decider
4283 * @ap: port to consider
4285 * This function encapsulates the policy for speed management
4286 * in one place. At the moment we don't cache the result but
4287 * there is a good case for setting ap->cbl to the result when
4288 * we are called with unknown cables (and figuring out if it
4289 * impacts hotplug at all).
4291 * Return 1 if the cable appears to be 40 wire.
4294 static int cable_is_40wire(struct ata_port *ap)
4296 struct ata_link *link;
4297 struct ata_device *dev;
4299 /* If the controller thinks we are 40 wire, we are. */
4300 if (ap->cbl == ATA_CBL_PATA40)
4303 /* If the controller thinks we are 80 wire, we are. */
4304 if (ap->cbl == ATA_CBL_PATA80 || ap->cbl == ATA_CBL_SATA)
4307 /* If the system is known to be 40 wire short cable (eg
4308 * laptop), then we allow 80 wire modes even if the drive
4311 if (ap->cbl == ATA_CBL_PATA40_SHORT)
4314 /* If the controller doesn't know, we scan.
4316 * Note: We look for all 40 wire detects at this point. Any
4317 * 80 wire detect is taken to be 80 wire cable because
4318 * - in many setups only the one drive (slave if present) will
4319 * give a valid detect
4320 * - if you have a non detect capable drive you don't want it
4321 * to colour the choice
4323 ata_for_each_link(link, ap, EDGE) {
4324 ata_for_each_dev(dev, link, ENABLED) {
4325 if (!ata_is_40wire(dev))
4333 * ata_dev_xfermask - Compute supported xfermask of the given device
4334 * @dev: Device to compute xfermask for
4336 * Compute supported xfermask of @dev and store it in
4337 * dev->*_mask. This function is responsible for applying all
4338 * known limits including host controller limits, device
4344 static void ata_dev_xfermask(struct ata_device *dev)
4346 struct ata_link *link = dev->link;
4347 struct ata_port *ap = link->ap;
4348 struct ata_host *host = ap->host;
4349 unsigned long xfer_mask;
4351 /* controller modes available */
4352 xfer_mask = ata_pack_xfermask(ap->pio_mask,
4353 ap->mwdma_mask, ap->udma_mask);
4355 /* drive modes available */
4356 xfer_mask &= ata_pack_xfermask(dev->pio_mask,
4357 dev->mwdma_mask, dev->udma_mask);
4358 xfer_mask &= ata_id_xfermask(dev->id);
4361 * CFA Advanced TrueIDE timings are not allowed on a shared
4364 if (ata_dev_pair(dev)) {
4365 /* No PIO5 or PIO6 */
4366 xfer_mask &= ~(0x03 << (ATA_SHIFT_PIO + 5));
4367 /* No MWDMA3 or MWDMA 4 */
4368 xfer_mask &= ~(0x03 << (ATA_SHIFT_MWDMA + 3));
4371 if (ata_dma_blacklisted(dev)) {
4372 xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA);
4373 ata_dev_printk(dev, KERN_WARNING,
4374 "device is on DMA blacklist, disabling DMA\n");
4377 if ((host->flags & ATA_HOST_SIMPLEX) &&
4378 host->simplex_claimed && host->simplex_claimed != ap) {
4379 xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA);
4380 ata_dev_printk(dev, KERN_WARNING, "simplex DMA is claimed by "
4381 "other device, disabling DMA\n");
4384 if (ap->flags & ATA_FLAG_NO_IORDY)
4385 xfer_mask &= ata_pio_mask_no_iordy(dev);
4387 if (ap->ops->mode_filter)
4388 xfer_mask = ap->ops->mode_filter(dev, xfer_mask);
4390 /* Apply cable rule here. Don't apply it early because when
4391 * we handle hot plug the cable type can itself change.
4392 * Check this last so that we know if the transfer rate was
4393 * solely limited by the cable.
4394 * Unknown or 80 wire cables reported host side are checked
4395 * drive side as well. Cases where we know a 40wire cable
4396 * is used safely for 80 are not checked here.
4398 if (xfer_mask & (0xF8 << ATA_SHIFT_UDMA))
4399 /* UDMA/44 or higher would be available */
4400 if (cable_is_40wire(ap)) {
4401 ata_dev_printk(dev, KERN_WARNING,
4402 "limited to UDMA/33 due to 40-wire cable\n");
4403 xfer_mask &= ~(0xF8 << ATA_SHIFT_UDMA);
4406 ata_unpack_xfermask(xfer_mask, &dev->pio_mask,
4407 &dev->mwdma_mask, &dev->udma_mask);
4411 * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command
4412 * @dev: Device to which command will be sent
4414 * Issue SET FEATURES - XFER MODE command to device @dev
4418 * PCI/etc. bus probe sem.
4421 * 0 on success, AC_ERR_* mask otherwise.
4424 static unsigned int ata_dev_set_xfermode(struct ata_device *dev)
4426 struct ata_taskfile tf;
4427 unsigned int err_mask;
4429 /* set up set-features taskfile */
4430 DPRINTK("set features - xfer mode\n");
4432 /* Some controllers and ATAPI devices show flaky interrupt
4433 * behavior after setting xfer mode. Use polling instead.
4435 ata_tf_init(dev, &tf);
4436 tf.command = ATA_CMD_SET_FEATURES;
4437 tf.feature = SETFEATURES_XFER;
4438 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_POLLING;
4439 tf.protocol = ATA_PROT_NODATA;
4440 /* If we are using IORDY we must send the mode setting command */
4441 if (ata_pio_need_iordy(dev))
4442 tf.nsect = dev->xfer_mode;
4443 /* If the device has IORDY and the controller does not - turn it off */
4444 else if (ata_id_has_iordy(dev->id))
4446 else /* In the ancient relic department - skip all of this */
4449 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
4451 DPRINTK("EXIT, err_mask=%x\n", err_mask);
4455 * ata_dev_set_feature - Issue SET FEATURES - SATA FEATURES
4456 * @dev: Device to which command will be sent
4457 * @enable: Whether to enable or disable the feature
4458 * @feature: The sector count represents the feature to set
4460 * Issue SET FEATURES - SATA FEATURES command to device @dev
4461 * on port @ap with sector count
4464 * PCI/etc. bus probe sem.
4467 * 0 on success, AC_ERR_* mask otherwise.
4469 static unsigned int ata_dev_set_feature(struct ata_device *dev, u8 enable,
4472 struct ata_taskfile tf;
4473 unsigned int err_mask;
4475 /* set up set-features taskfile */
4476 DPRINTK("set features - SATA features\n");
4478 ata_tf_init(dev, &tf);
4479 tf.command = ATA_CMD_SET_FEATURES;
4480 tf.feature = enable;
4481 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
4482 tf.protocol = ATA_PROT_NODATA;
4485 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
4487 DPRINTK("EXIT, err_mask=%x\n", err_mask);
4492 * ata_dev_init_params - Issue INIT DEV PARAMS command
4493 * @dev: Device to which command will be sent
4494 * @heads: Number of heads (taskfile parameter)
4495 * @sectors: Number of sectors (taskfile parameter)
4498 * Kernel thread context (may sleep)
4501 * 0 on success, AC_ERR_* mask otherwise.
4503 static unsigned int ata_dev_init_params(struct ata_device *dev,
4504 u16 heads, u16 sectors)
4506 struct ata_taskfile tf;
4507 unsigned int err_mask;
4509 /* Number of sectors per track 1-255. Number of heads 1-16 */
4510 if (sectors < 1 || sectors > 255 || heads < 1 || heads > 16)
4511 return AC_ERR_INVALID;
4513 /* set up init dev params taskfile */
4514 DPRINTK("init dev params \n");
4516 ata_tf_init(dev, &tf);
4517 tf.command = ATA_CMD_INIT_DEV_PARAMS;
4518 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
4519 tf.protocol = ATA_PROT_NODATA;
4521 tf.device |= (heads - 1) & 0x0f; /* max head = num. of heads - 1 */
4523 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
4524 /* A clean abort indicates an original or just out of spec drive
4525 and we should continue as we issue the setup based on the
4526 drive reported working geometry */
4527 if (err_mask == AC_ERR_DEV && (tf.feature & ATA_ABORTED))
4530 DPRINTK("EXIT, err_mask=%x\n", err_mask);
4535 * ata_sg_clean - Unmap DMA memory associated with command
4536 * @qc: Command containing DMA memory to be released
4538 * Unmap all mapped DMA memory associated with this command.
4541 * spin_lock_irqsave(host lock)
4543 void ata_sg_clean(struct ata_queued_cmd *qc)
4545 struct ata_port *ap = qc->ap;
4546 struct scatterlist *sg = qc->sg;
4547 int dir = qc->dma_dir;
4549 WARN_ON_ONCE(sg == NULL);
4551 VPRINTK("unmapping %u sg elements\n", qc->n_elem);
4554 dma_unmap_sg(ap->dev, sg, qc->n_elem, dir);
4556 qc->flags &= ~ATA_QCFLAG_DMAMAP;
4561 * atapi_check_dma - Check whether ATAPI DMA can be supported
4562 * @qc: Metadata associated with taskfile to check
4564 * Allow low-level driver to filter ATA PACKET commands, returning
4565 * a status indicating whether or not it is OK to use DMA for the
4566 * supplied PACKET command.
4569 * spin_lock_irqsave(host lock)
4571 * RETURNS: 0 when ATAPI DMA can be used
4574 int atapi_check_dma(struct ata_queued_cmd *qc)
4576 struct ata_port *ap = qc->ap;
4578 /* Don't allow DMA if it isn't multiple of 16 bytes. Quite a
4579 * few ATAPI devices choke on such DMA requests.
4581 if (!(qc->dev->horkage & ATA_HORKAGE_ATAPI_MOD16_DMA) &&
4582 unlikely(qc->nbytes & 15))
4585 if (ap->ops->check_atapi_dma)
4586 return ap->ops->check_atapi_dma(qc);
4592 * ata_std_qc_defer - Check whether a qc needs to be deferred
4593 * @qc: ATA command in question
4595 * Non-NCQ commands cannot run with any other command, NCQ or
4596 * not. As upper layer only knows the queue depth, we are
4597 * responsible for maintaining exclusion. This function checks
4598 * whether a new command @qc can be issued.
4601 * spin_lock_irqsave(host lock)
4604 * ATA_DEFER_* if deferring is needed, 0 otherwise.
4606 int ata_std_qc_defer(struct ata_queued_cmd *qc)
4608 struct ata_link *link = qc->dev->link;
4610 if (qc->tf.protocol == ATA_PROT_NCQ) {
4611 if (!ata_tag_valid(link->active_tag))
4614 if (!ata_tag_valid(link->active_tag) && !link->sactive)
4618 return ATA_DEFER_LINK;
4621 void ata_noop_qc_prep(struct ata_queued_cmd *qc) { }
4624 * ata_sg_init - Associate command with scatter-gather table.
4625 * @qc: Command to be associated
4626 * @sg: Scatter-gather table.
4627 * @n_elem: Number of elements in s/g table.
4629 * Initialize the data-related elements of queued_cmd @qc
4630 * to point to a scatter-gather table @sg, containing @n_elem
4634 * spin_lock_irqsave(host lock)
4636 void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
4637 unsigned int n_elem)
4640 qc->n_elem = n_elem;
4645 * ata_sg_setup - DMA-map the scatter-gather table associated with a command.
4646 * @qc: Command with scatter-gather table to be mapped.
4648 * DMA-map the scatter-gather table associated with queued_cmd @qc.
4651 * spin_lock_irqsave(host lock)
4654 * Zero on success, negative on error.
4657 static int ata_sg_setup(struct ata_queued_cmd *qc)
4659 struct ata_port *ap = qc->ap;
4660 unsigned int n_elem;
4662 VPRINTK("ENTER, ata%u\n", ap->print_id);
4664 n_elem = dma_map_sg(ap->dev, qc->sg, qc->n_elem, qc->dma_dir);
4668 DPRINTK("%d sg elements mapped\n", n_elem);
4670 qc->n_elem = n_elem;
4671 qc->flags |= ATA_QCFLAG_DMAMAP;
4677 * swap_buf_le16 - swap halves of 16-bit words in place
4678 * @buf: Buffer to swap
4679 * @buf_words: Number of 16-bit words in buffer.
4681 * Swap halves of 16-bit words if needed to convert from
4682 * little-endian byte order to native cpu byte order, or
4686 * Inherited from caller.
4688 void swap_buf_le16(u16 *buf, unsigned int buf_words)
4693 for (i = 0; i < buf_words; i++)
4694 buf[i] = le16_to_cpu(buf[i]);
4695 #endif /* __BIG_ENDIAN */
4699 * ata_qc_new - Request an available ATA command, for queueing
4706 static struct ata_queued_cmd *ata_qc_new(struct ata_port *ap)
4708 struct ata_queued_cmd *qc = NULL;
4711 /* no command while frozen */
4712 if (unlikely(ap->pflags & ATA_PFLAG_FROZEN))
4715 /* the last tag is reserved for internal command. */
4716 for (i = 0; i < ATA_MAX_QUEUE - 1; i++)
4717 if (!test_and_set_bit(i, &ap->qc_allocated)) {
4718 qc = __ata_qc_from_tag(ap, i);
4729 * ata_qc_new_init - Request an available ATA command, and initialize it
4730 * @dev: Device from whom we request an available command structure
4736 struct ata_queued_cmd *ata_qc_new_init(struct ata_device *dev)
4738 struct ata_port *ap = dev->link->ap;
4739 struct ata_queued_cmd *qc;
4741 qc = ata_qc_new(ap);
4754 * ata_qc_free - free unused ata_queued_cmd
4755 * @qc: Command to complete
4757 * Designed to free unused ata_queued_cmd object
4758 * in case something prevents using it.
4761 * spin_lock_irqsave(host lock)
4763 void ata_qc_free(struct ata_queued_cmd *qc)
4765 struct ata_port *ap = qc->ap;
4768 WARN_ON_ONCE(qc == NULL); /* ata_qc_from_tag _might_ return NULL */
4772 if (likely(ata_tag_valid(tag))) {
4773 qc->tag = ATA_TAG_POISON;
4774 clear_bit(tag, &ap->qc_allocated);
4778 void __ata_qc_complete(struct ata_queued_cmd *qc)
4780 struct ata_port *ap = qc->ap;
4781 struct ata_link *link = qc->dev->link;
4783 WARN_ON_ONCE(qc == NULL); /* ata_qc_from_tag _might_ return NULL */
4784 WARN_ON_ONCE(!(qc->flags & ATA_QCFLAG_ACTIVE));
4786 if (likely(qc->flags & ATA_QCFLAG_DMAMAP))
4789 /* command should be marked inactive atomically with qc completion */
4790 if (qc->tf.protocol == ATA_PROT_NCQ) {
4791 link->sactive &= ~(1 << qc->tag);
4793 ap->nr_active_links--;
4795 link->active_tag = ATA_TAG_POISON;
4796 ap->nr_active_links--;
4799 /* clear exclusive status */
4800 if (unlikely(qc->flags & ATA_QCFLAG_CLEAR_EXCL &&
4801 ap->excl_link == link))
4802 ap->excl_link = NULL;
4804 /* atapi: mark qc as inactive to prevent the interrupt handler
4805 * from completing the command twice later, before the error handler
4806 * is called. (when rc != 0 and atapi request sense is needed)
4808 qc->flags &= ~ATA_QCFLAG_ACTIVE;
4809 ap->qc_active &= ~(1 << qc->tag);
4811 /* call completion callback */
4812 qc->complete_fn(qc);
4815 static void fill_result_tf(struct ata_queued_cmd *qc)
4817 struct ata_port *ap = qc->ap;
4819 qc->result_tf.flags = qc->tf.flags;
4820 ap->ops->qc_fill_rtf(qc);
4823 static void ata_verify_xfer(struct ata_queued_cmd *qc)
4825 struct ata_device *dev = qc->dev;
4827 if (ata_tag_internal(qc->tag))
4830 if (ata_is_nodata(qc->tf.protocol))
4833 if ((dev->mwdma_mask || dev->udma_mask) && ata_is_pio(qc->tf.protocol))
4836 dev->flags &= ~ATA_DFLAG_DUBIOUS_XFER;
4840 * ata_qc_complete - Complete an active ATA command
4841 * @qc: Command to complete
4843 * Indicate to the mid and upper layers that an ATA
4844 * command has completed, with either an ok or not-ok status.
4847 * spin_lock_irqsave(host lock)
4849 void ata_qc_complete(struct ata_queued_cmd *qc)
4851 struct ata_port *ap = qc->ap;
4853 /* XXX: New EH and old EH use different mechanisms to
4854 * synchronize EH with regular execution path.
4856 * In new EH, a failed qc is marked with ATA_QCFLAG_FAILED.
4857 * Normal execution path is responsible for not accessing a
4858 * failed qc. libata core enforces the rule by returning NULL
4859 * from ata_qc_from_tag() for failed qcs.
4861 * Old EH depends on ata_qc_complete() nullifying completion
4862 * requests if ATA_QCFLAG_EH_SCHEDULED is set. Old EH does
4863 * not synchronize with interrupt handler. Only PIO task is
4866 if (ap->ops->error_handler) {
4867 struct ata_device *dev = qc->dev;
4868 struct ata_eh_info *ehi = &dev->link->eh_info;
4870 WARN_ON_ONCE(ap->pflags & ATA_PFLAG_FROZEN);
4872 if (unlikely(qc->err_mask))
4873 qc->flags |= ATA_QCFLAG_FAILED;
4875 if (unlikely(qc->flags & ATA_QCFLAG_FAILED)) {
4876 if (!ata_tag_internal(qc->tag)) {
4877 /* always fill result TF for failed qc */
4879 ata_qc_schedule_eh(qc);
4884 /* read result TF if requested */
4885 if (qc->flags & ATA_QCFLAG_RESULT_TF)
4888 /* Some commands need post-processing after successful
4891 switch (qc->tf.command) {
4892 case ATA_CMD_SET_FEATURES:
4893 if (qc->tf.feature != SETFEATURES_WC_ON &&
4894 qc->tf.feature != SETFEATURES_WC_OFF)
4897 case ATA_CMD_INIT_DEV_PARAMS: /* CHS translation changed */
4898 case ATA_CMD_SET_MULTI: /* multi_count changed */
4899 /* revalidate device */
4900 ehi->dev_action[dev->devno] |= ATA_EH_REVALIDATE;
4901 ata_port_schedule_eh(ap);
4905 dev->flags |= ATA_DFLAG_SLEEPING;
4909 if (unlikely(dev->flags & ATA_DFLAG_DUBIOUS_XFER))
4910 ata_verify_xfer(qc);
4912 __ata_qc_complete(qc);
4914 if (qc->flags & ATA_QCFLAG_EH_SCHEDULED)
4917 /* read result TF if failed or requested */
4918 if (qc->err_mask || qc->flags & ATA_QCFLAG_RESULT_TF)
4921 __ata_qc_complete(qc);
4926 * ata_qc_complete_multiple - Complete multiple qcs successfully
4927 * @ap: port in question
4928 * @qc_active: new qc_active mask
4930 * Complete in-flight commands. This functions is meant to be
4931 * called from low-level driver's interrupt routine to complete
4932 * requests normally. ap->qc_active and @qc_active is compared
4933 * and commands are completed accordingly.
4936 * spin_lock_irqsave(host lock)
4939 * Number of completed commands on success, -errno otherwise.
4941 int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active)
4947 done_mask = ap->qc_active ^ qc_active;
4949 if (unlikely(done_mask & qc_active)) {
4950 ata_port_printk(ap, KERN_ERR, "illegal qc_active transition "
4951 "(%08x->%08x)\n", ap->qc_active, qc_active);
4955 for (i = 0; i < ATA_MAX_QUEUE; i++) {
4956 struct ata_queued_cmd *qc;
4958 if (!(done_mask & (1 << i)))
4961 if ((qc = ata_qc_from_tag(ap, i))) {
4962 ata_qc_complete(qc);
4971 * ata_qc_issue - issue taskfile to device
4972 * @qc: command to issue to device
4974 * Prepare an ATA command to submission to device.
4975 * This includes mapping the data into a DMA-able
4976 * area, filling in the S/G table, and finally
4977 * writing the taskfile to hardware, starting the command.
4980 * spin_lock_irqsave(host lock)
4982 void ata_qc_issue(struct ata_queued_cmd *qc)
4984 struct ata_port *ap = qc->ap;
4985 struct ata_link *link = qc->dev->link;
4986 u8 prot = qc->tf.protocol;
4988 /* Make sure only one non-NCQ command is outstanding. The
4989 * check is skipped for old EH because it reuses active qc to
4990 * request ATAPI sense.
4992 WARN_ON_ONCE(ap->ops->error_handler && ata_tag_valid(link->active_tag));
4994 if (ata_is_ncq(prot)) {
4995 WARN_ON_ONCE(link->sactive & (1 << qc->tag));
4998 ap->nr_active_links++;
4999 link->sactive |= 1 << qc->tag;
5001 WARN_ON_ONCE(link->sactive);
5003 ap->nr_active_links++;
5004 link->active_tag = qc->tag;
5007 qc->flags |= ATA_QCFLAG_ACTIVE;
5008 ap->qc_active |= 1 << qc->tag;
5010 /* We guarantee to LLDs that they will have at least one
5011 * non-zero sg if the command is a data command.
5013 BUG_ON(ata_is_data(prot) && (!qc->sg || !qc->n_elem || !qc->nbytes));
5015 if (ata_is_dma(prot) || (ata_is_pio(prot) &&
5016 (ap->flags & ATA_FLAG_PIO_DMA)))
5017 if (ata_sg_setup(qc))
5020 /* if device is sleeping, schedule reset and abort the link */
5021 if (unlikely(qc->dev->flags & ATA_DFLAG_SLEEPING)) {
5022 link->eh_info.action |= ATA_EH_RESET;
5023 ata_ehi_push_desc(&link->eh_info, "waking up from sleep");
5024 ata_link_abort(link);
5028 ap->ops->qc_prep(qc);
5030 qc->err_mask |= ap->ops->qc_issue(qc);
5031 if (unlikely(qc->err_mask))
5036 qc->err_mask |= AC_ERR_SYSTEM;
5038 ata_qc_complete(qc);
5042 * sata_scr_valid - test whether SCRs are accessible
5043 * @link: ATA link to test SCR accessibility for
5045 * Test whether SCRs are accessible for @link.
5051 * 1 if SCRs are accessible, 0 otherwise.
5053 int sata_scr_valid(struct ata_link *link)
5055 struct ata_port *ap = link->ap;
5057 return (ap->flags & ATA_FLAG_SATA) && ap->ops->scr_read;
5061 * sata_scr_read - read SCR register of the specified port
5062 * @link: ATA link to read SCR for
5064 * @val: Place to store read value
5066 * Read SCR register @reg of @link into *@val. This function is
5067 * guaranteed to succeed if @link is ap->link, the cable type of
5068 * the port is SATA and the port implements ->scr_read.
5071 * None if @link is ap->link. Kernel thread context otherwise.
5074 * 0 on success, negative errno on failure.
5076 int sata_scr_read(struct ata_link *link, int reg, u32 *val)
5078 if (ata_is_host_link(link)) {
5079 if (sata_scr_valid(link))
5080 return link->ap->ops->scr_read(link, reg, val);
5084 return sata_pmp_scr_read(link, reg, val);
5088 * sata_scr_write - write SCR register of the specified port
5089 * @link: ATA link to write SCR for
5090 * @reg: SCR to write
5091 * @val: value to write
5093 * Write @val to SCR register @reg of @link. This function is
5094 * guaranteed to succeed if @link is ap->link, the cable type of
5095 * the port is SATA and the port implements ->scr_read.
5098 * None if @link is ap->link. Kernel thread context otherwise.
5101 * 0 on success, negative errno on failure.
5103 int sata_scr_write(struct ata_link *link, int reg, u32 val)
5105 if (ata_is_host_link(link)) {
5106 if (sata_scr_valid(link))
5107 return link->ap->ops->scr_write(link, reg, val);
5111 return sata_pmp_scr_write(link, reg, val);
5115 * sata_scr_write_flush - write SCR register of the specified port and flush
5116 * @link: ATA link to write SCR for
5117 * @reg: SCR to write
5118 * @val: value to write
5120 * This function is identical to sata_scr_write() except that this
5121 * function performs flush after writing to the register.
5124 * None if @link is ap->link. Kernel thread context otherwise.
5127 * 0 on success, negative errno on failure.
5129 int sata_scr_write_flush(struct ata_link *link, int reg, u32 val)
5131 if (ata_is_host_link(link)) {
5134 if (sata_scr_valid(link)) {
5135 rc = link->ap->ops->scr_write(link, reg, val);
5137 rc = link->ap->ops->scr_read(link, reg, &val);
5143 return sata_pmp_scr_write(link, reg, val);
5147 * ata_phys_link_online - test whether the given link is online
5148 * @link: ATA link to test
5150 * Test whether @link is online. Note that this function returns
5151 * 0 if online status of @link cannot be obtained, so
5152 * ata_link_online(link) != !ata_link_offline(link).
5158 * True if the port online status is available and online.
5160 bool ata_phys_link_online(struct ata_link *link)
5164 if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0 &&
5165 (sstatus & 0xf) == 0x3)
5171 * ata_phys_link_offline - test whether the given link is offline
5172 * @link: ATA link to test
5174 * Test whether @link is offline. Note that this function
5175 * returns 0 if offline status of @link cannot be obtained, so
5176 * ata_link_online(link) != !ata_link_offline(link).
5182 * True if the port offline status is available and offline.
5184 bool ata_phys_link_offline(struct ata_link *link)
5188 if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0 &&
5189 (sstatus & 0xf) != 0x3)
5195 * ata_link_online - test whether the given link is online
5196 * @link: ATA link to test
5198 * Test whether @link is online. This is identical to
5199 * ata_phys_link_online() when there's no slave link. When
5200 * there's a slave link, this function should only be called on
5201 * the master link and will return true if any of M/S links is
5208 * True if the port online status is available and online.
5210 bool ata_link_online(struct ata_link *link)
5212 struct ata_link *slave = link->ap->slave_link;
5214 WARN_ON(link == slave); /* shouldn't be called on slave link */
5216 return ata_phys_link_online(link) ||
5217 (slave && ata_phys_link_online(slave));
5221 * ata_link_offline - test whether the given link is offline
5222 * @link: ATA link to test
5224 * Test whether @link is offline. This is identical to
5225 * ata_phys_link_offline() when there's no slave link. When
5226 * there's a slave link, this function should only be called on
5227 * the master link and will return true if both M/S links are
5234 * True if the port offline status is available and offline.
5236 bool ata_link_offline(struct ata_link *link)
5238 struct ata_link *slave = link->ap->slave_link;
5240 WARN_ON(link == slave); /* shouldn't be called on slave link */
5242 return ata_phys_link_offline(link) &&
5243 (!slave || ata_phys_link_offline(slave));
5247 static int ata_host_request_pm(struct ata_host *host, pm_message_t mesg,
5248 unsigned int action, unsigned int ehi_flags,
5251 unsigned long flags;
5254 for (i = 0; i < host->n_ports; i++) {
5255 struct ata_port *ap = host->ports[i];
5256 struct ata_link *link;
5258 /* Previous resume operation might still be in
5259 * progress. Wait for PM_PENDING to clear.
5261 if (ap->pflags & ATA_PFLAG_PM_PENDING) {
5262 ata_port_wait_eh(ap);
5263 WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING);
5266 /* request PM ops to EH */
5267 spin_lock_irqsave(ap->lock, flags);
5272 ap->pm_result = &rc;
5275 ap->pflags |= ATA_PFLAG_PM_PENDING;
5276 ata_for_each_link(link, ap, HOST_FIRST) {
5277 link->eh_info.action |= action;
5278 link->eh_info.flags |= ehi_flags;
5281 ata_port_schedule_eh(ap);
5283 spin_unlock_irqrestore(ap->lock, flags);
5285 /* wait and check result */
5287 ata_port_wait_eh(ap);
5288 WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING);
5298 * ata_host_suspend - suspend host
5299 * @host: host to suspend
5302 * Suspend @host. Actual operation is performed by EH. This
5303 * function requests EH to perform PM operations and waits for EH
5307 * Kernel thread context (may sleep).
5310 * 0 on success, -errno on failure.
5312 int ata_host_suspend(struct ata_host *host, pm_message_t mesg)
5317 * disable link pm on all ports before requesting
5320 ata_lpm_enable(host);
5322 rc = ata_host_request_pm(host, mesg, 0, ATA_EHI_QUIET, 1);
5324 host->dev->power.power_state = mesg;
5329 * ata_host_resume - resume host
5330 * @host: host to resume
5332 * Resume @host. Actual operation is performed by EH. This
5333 * function requests EH to perform PM operations and returns.
5334 * Note that all resume operations are performed parallely.
5337 * Kernel thread context (may sleep).
5339 void ata_host_resume(struct ata_host *host)
5341 ata_host_request_pm(host, PMSG_ON, ATA_EH_RESET,
5342 ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET, 0);
5343 host->dev->power.power_state = PMSG_ON;
5345 /* reenable link pm */
5346 ata_lpm_disable(host);
5351 * ata_port_start - Set port up for dma.
5352 * @ap: Port to initialize
5354 * Called just after data structures for each port are
5355 * initialized. Allocates space for PRD table.
5357 * May be used as the port_start() entry in ata_port_operations.
5360 * Inherited from caller.
5362 int ata_port_start(struct ata_port *ap)
5364 struct device *dev = ap->dev;
5366 ap->prd = dmam_alloc_coherent(dev, ATA_PRD_TBL_SZ, &ap->prd_dma,
5375 * ata_dev_init - Initialize an ata_device structure
5376 * @dev: Device structure to initialize
5378 * Initialize @dev in preparation for probing.
5381 * Inherited from caller.
5383 void ata_dev_init(struct ata_device *dev)
5385 struct ata_link *link = ata_dev_phys_link(dev);
5386 struct ata_port *ap = link->ap;
5387 unsigned long flags;
5389 /* SATA spd limit is bound to the attached device, reset together */
5390 link->sata_spd_limit = link->hw_sata_spd_limit;
5393 /* High bits of dev->flags are used to record warm plug
5394 * requests which occur asynchronously. Synchronize using
5397 spin_lock_irqsave(ap->lock, flags);
5398 dev->flags &= ~ATA_DFLAG_INIT_MASK;
5400 spin_unlock_irqrestore(ap->lock, flags);
5402 memset((void *)dev + ATA_DEVICE_CLEAR_OFFSET, 0,
5403 sizeof(*dev) - ATA_DEVICE_CLEAR_OFFSET);
5404 dev->pio_mask = UINT_MAX;
5405 dev->mwdma_mask = UINT_MAX;
5406 dev->udma_mask = UINT_MAX;
5410 * ata_link_init - Initialize an ata_link structure
5411 * @ap: ATA port link is attached to
5412 * @link: Link structure to initialize
5413 * @pmp: Port multiplier port number
5418 * Kernel thread context (may sleep)
5420 void ata_link_init(struct ata_port *ap, struct ata_link *link, int pmp)
5424 /* clear everything except for devices */
5425 memset(link, 0, offsetof(struct ata_link, device[0]));
5429 link->active_tag = ATA_TAG_POISON;
5430 link->hw_sata_spd_limit = UINT_MAX;
5432 /* can't use iterator, ap isn't initialized yet */
5433 for (i = 0; i < ATA_MAX_DEVICES; i++) {
5434 struct ata_device *dev = &link->device[i];
5437 dev->devno = dev - link->device;
5443 * sata_link_init_spd - Initialize link->sata_spd_limit
5444 * @link: Link to configure sata_spd_limit for
5446 * Initialize @link->[hw_]sata_spd_limit to the currently
5450 * Kernel thread context (may sleep).
5453 * 0 on success, -errno on failure.
5455 int sata_link_init_spd(struct ata_link *link)
5460 rc = sata_scr_read(link, SCR_CONTROL, &link->saved_scontrol);
5464 spd = (link->saved_scontrol >> 4) & 0xf;
5466 link->hw_sata_spd_limit &= (1 << spd) - 1;
5468 ata_force_link_limits(link);
5470 link->sata_spd_limit = link->hw_sata_spd_limit;
5476 * ata_port_alloc - allocate and initialize basic ATA port resources
5477 * @host: ATA host this allocated port belongs to
5479 * Allocate and initialize basic ATA port resources.
5482 * Allocate ATA port on success, NULL on failure.
5485 * Inherited from calling layer (may sleep).
5487 struct ata_port *ata_port_alloc(struct ata_host *host)
5489 struct ata_port *ap;
5493 ap = kzalloc(sizeof(*ap), GFP_KERNEL);
5497 ap->pflags |= ATA_PFLAG_INITIALIZING;
5498 ap->lock = &host->lock;
5499 ap->flags = ATA_FLAG_DISABLED;
5501 ap->ctl = ATA_DEVCTL_OBS;
5503 ap->dev = host->dev;
5504 ap->last_ctl = 0xFF;
5506 #if defined(ATA_VERBOSE_DEBUG)
5507 /* turn on all debugging levels */
5508 ap->msg_enable = 0x00FF;
5509 #elif defined(ATA_DEBUG)
5510 ap->msg_enable = ATA_MSG_DRV | ATA_MSG_INFO | ATA_MSG_CTL | ATA_MSG_WARN | ATA_MSG_ERR;
5512 ap->msg_enable = ATA_MSG_DRV | ATA_MSG_ERR | ATA_MSG_WARN;
5515 #ifdef CONFIG_ATA_SFF
5516 INIT_DELAYED_WORK(&ap->port_task, ata_pio_task);
5518 INIT_DELAYED_WORK(&ap->port_task, NULL);
5520 INIT_DELAYED_WORK(&ap->hotplug_task, ata_scsi_hotplug);
5521 INIT_WORK(&ap->scsi_rescan_task, ata_scsi_dev_rescan);
5522 INIT_LIST_HEAD(&ap->eh_done_q);
5523 init_waitqueue_head(&ap->eh_wait_q);
5524 init_completion(&ap->park_req_pending);
5525 init_timer_deferrable(&ap->fastdrain_timer);
5526 ap->fastdrain_timer.function = ata_eh_fastdrain_timerfn;
5527 ap->fastdrain_timer.data = (unsigned long)ap;
5529 ap->cbl = ATA_CBL_NONE;
5531 ata_link_init(ap, &ap->link, 0);
5534 ap->stats.unhandled_irq = 1;
5535 ap->stats.idle_irq = 1;
5540 static void ata_host_release(struct device *gendev, void *res)
5542 struct ata_host *host = dev_get_drvdata(gendev);
5545 for (i = 0; i < host->n_ports; i++) {
5546 struct ata_port *ap = host->ports[i];
5552 scsi_host_put(ap->scsi_host);
5554 kfree(ap->pmp_link);
5555 kfree(ap->slave_link);
5557 host->ports[i] = NULL;
5560 dev_set_drvdata(gendev, NULL);
5564 * ata_host_alloc - allocate and init basic ATA host resources
5565 * @dev: generic device this host is associated with
5566 * @max_ports: maximum number of ATA ports associated with this host
5568 * Allocate and initialize basic ATA host resources. LLD calls
5569 * this function to allocate a host, initializes it fully and
5570 * attaches it using ata_host_register().
5572 * @max_ports ports are allocated and host->n_ports is
5573 * initialized to @max_ports. The caller is allowed to decrease
5574 * host->n_ports before calling ata_host_register(). The unused
5575 * ports will be automatically freed on registration.
5578 * Allocate ATA host on success, NULL on failure.
5581 * Inherited from calling layer (may sleep).
5583 struct ata_host *ata_host_alloc(struct device *dev, int max_ports)
5585 struct ata_host *host;
5591 if (!devres_open_group(dev, NULL, GFP_KERNEL))
5594 /* alloc a container for our list of ATA ports (buses) */
5595 sz = sizeof(struct ata_host) + (max_ports + 1) * sizeof(void *);
5596 /* alloc a container for our list of ATA ports (buses) */
5597 host = devres_alloc(ata_host_release, sz, GFP_KERNEL);
5601 devres_add(dev, host);
5602 dev_set_drvdata(dev, host);
5604 spin_lock_init(&host->lock);
5606 host->n_ports = max_ports;
5608 /* allocate ports bound to this host */
5609 for (i = 0; i < max_ports; i++) {
5610 struct ata_port *ap;
5612 ap = ata_port_alloc(host);
5617 host->ports[i] = ap;
5620 devres_remove_group(dev, NULL);
5624 devres_release_group(dev, NULL);
5629 * ata_host_alloc_pinfo - alloc host and init with port_info array
5630 * @dev: generic device this host is associated with
5631 * @ppi: array of ATA port_info to initialize host with
5632 * @n_ports: number of ATA ports attached to this host
5634 * Allocate ATA host and initialize with info from @ppi. If NULL
5635 * terminated, @ppi may contain fewer entries than @n_ports. The
5636 * last entry will be used for the remaining ports.
5639 * Allocate ATA host on success, NULL on failure.
5642 * Inherited from calling layer (may sleep).
5644 struct ata_host *ata_host_alloc_pinfo(struct device *dev,
5645 const struct ata_port_info * const * ppi,
5648 const struct ata_port_info *pi;
5649 struct ata_host *host;
5652 host = ata_host_alloc(dev, n_ports);
5656 for (i = 0, j = 0, pi = NULL; i < host->n_ports; i++) {
5657 struct ata_port *ap = host->ports[i];
5662 ap->pio_mask = pi->pio_mask;
5663 ap->mwdma_mask = pi->mwdma_mask;
5664 ap->udma_mask = pi->udma_mask;
5665 ap->flags |= pi->flags;
5666 ap->link.flags |= pi->link_flags;
5667 ap->ops = pi->port_ops;
5669 if (!host->ops && (pi->port_ops != &ata_dummy_port_ops))
5670 host->ops = pi->port_ops;
5677 * ata_slave_link_init - initialize slave link
5678 * @ap: port to initialize slave link for
5680 * Create and initialize slave link for @ap. This enables slave
5681 * link handling on the port.
5683 * In libata, a port contains links and a link contains devices.
5684 * There is single host link but if a PMP is attached to it,
5685 * there can be multiple fan-out links. On SATA, there's usually
5686 * a single device connected to a link but PATA and SATA
5687 * controllers emulating TF based interface can have two - master
5690 * However, there are a few controllers which don't fit into this
5691 * abstraction too well - SATA controllers which emulate TF
5692 * interface with both master and slave devices but also have
5693 * separate SCR register sets for each device. These controllers
5694 * need separate links for physical link handling
5695 * (e.g. onlineness, link speed) but should be treated like a
5696 * traditional M/S controller for everything else (e.g. command
5697 * issue, softreset).
5699 * slave_link is libata's way of handling this class of
5700 * controllers without impacting core layer too much. For
5701 * anything other than physical link handling, the default host
5702 * link is used for both master and slave. For physical link
5703 * handling, separate @ap->slave_link is used. All dirty details
5704 * are implemented inside libata core layer. From LLD's POV, the
5705 * only difference is that prereset, hardreset and postreset are
5706 * called once more for the slave link, so the reset sequence
5707 * looks like the following.
5709 * prereset(M) -> prereset(S) -> hardreset(M) -> hardreset(S) ->
5710 * softreset(M) -> postreset(M) -> postreset(S)
5712 * Note that softreset is called only for the master. Softreset
5713 * resets both M/S by definition, so SRST on master should handle
5714 * both (the standard method will work just fine).
5717 * Should be called before host is registered.
5720 * 0 on success, -errno on failure.
5722 int ata_slave_link_init(struct ata_port *ap)
5724 struct ata_link *link;
5726 WARN_ON(ap->slave_link);
5727 WARN_ON(ap->flags & ATA_FLAG_PMP);
5729 link = kzalloc(sizeof(*link), GFP_KERNEL);
5733 ata_link_init(ap, link, 1);
5734 ap->slave_link = link;
5738 static void ata_host_stop(struct device *gendev, void *res)
5740 struct ata_host *host = dev_get_drvdata(gendev);
5743 WARN_ON(!(host->flags & ATA_HOST_STARTED));
5745 for (i = 0; i < host->n_ports; i++) {
5746 struct ata_port *ap = host->ports[i];
5748 if (ap->ops->port_stop)
5749 ap->ops->port_stop(ap);
5752 if (host->ops->host_stop)
5753 host->ops->host_stop(host);
5757 * ata_finalize_port_ops - finalize ata_port_operations
5758 * @ops: ata_port_operations to finalize
5760 * An ata_port_operations can inherit from another ops and that
5761 * ops can again inherit from another. This can go on as many
5762 * times as necessary as long as there is no loop in the
5763 * inheritance chain.
5765 * Ops tables are finalized when the host is started. NULL or
5766 * unspecified entries are inherited from the closet ancestor
5767 * which has the method and the entry is populated with it.
5768 * After finalization, the ops table directly points to all the
5769 * methods and ->inherits is no longer necessary and cleared.
5771 * Using ATA_OP_NULL, inheriting ops can force a method to NULL.
5776 static void ata_finalize_port_ops(struct ata_port_operations *ops)
5778 static DEFINE_SPINLOCK(lock);
5779 const struct ata_port_operations *cur;
5780 void **begin = (void **)ops;
5781 void **end = (void **)&ops->inherits;
5784 if (!ops || !ops->inherits)
5789 for (cur = ops->inherits; cur; cur = cur->inherits) {
5790 void **inherit = (void **)cur;
5792 for (pp = begin; pp < end; pp++, inherit++)
5797 for (pp = begin; pp < end; pp++)
5801 ops->inherits = NULL;
5807 * ata_host_start - start and freeze ports of an ATA host
5808 * @host: ATA host to start ports for
5810 * Start and then freeze ports of @host. Started status is
5811 * recorded in host->flags, so this function can be called
5812 * multiple times. Ports are guaranteed to get started only
5813 * once. If host->ops isn't initialized yet, its set to the
5814 * first non-dummy port ops.
5817 * Inherited from calling layer (may sleep).
5820 * 0 if all ports are started successfully, -errno otherwise.
5822 int ata_host_start(struct ata_host *host)
5825 void *start_dr = NULL;
5828 if (host->flags & ATA_HOST_STARTED)
5831 ata_finalize_port_ops(host->ops);
5833 for (i = 0; i < host->n_ports; i++) {
5834 struct ata_port *ap = host->ports[i];
5836 ata_finalize_port_ops(ap->ops);
5838 if (!host->ops && !ata_port_is_dummy(ap))
5839 host->ops = ap->ops;
5841 if (ap->ops->port_stop)
5845 if (host->ops->host_stop)
5849 start_dr = devres_alloc(ata_host_stop, 0, GFP_KERNEL);
5854 for (i = 0; i < host->n_ports; i++) {
5855 struct ata_port *ap = host->ports[i];
5857 if (ap->ops->port_start) {
5858 rc = ap->ops->port_start(ap);
5861 dev_printk(KERN_ERR, host->dev,
5862 "failed to start port %d "
5863 "(errno=%d)\n", i, rc);
5867 ata_eh_freeze_port(ap);
5871 devres_add(host->dev, start_dr);
5872 host->flags |= ATA_HOST_STARTED;
5877 struct ata_port *ap = host->ports[i];
5879 if (ap->ops->port_stop)
5880 ap->ops->port_stop(ap);
5882 devres_free(start_dr);
5887 * ata_sas_host_init - Initialize a host struct
5888 * @host: host to initialize
5889 * @dev: device host is attached to
5890 * @flags: host flags
5894 * PCI/etc. bus probe sem.
5897 /* KILLME - the only user left is ipr */
5898 void ata_host_init(struct ata_host *host, struct device *dev,
5899 unsigned long flags, struct ata_port_operations *ops)
5901 spin_lock_init(&host->lock);
5903 host->flags = flags;
5908 static void async_port_probe(void *data, async_cookie_t cookie)
5911 struct ata_port *ap = data;
5914 * If we're not allowed to scan this host in parallel,
5915 * we need to wait until all previous scans have completed
5916 * before going further.
5917 * Jeff Garzik says this is only within a controller, so we
5918 * don't need to wait for port 0, only for later ports.
5920 if (!(ap->host->flags & ATA_HOST_PARALLEL_SCAN) && ap->port_no != 0)
5921 async_synchronize_cookie(cookie);
5924 if (ap->ops->error_handler) {
5925 struct ata_eh_info *ehi = &ap->link.eh_info;
5926 unsigned long flags;
5930 /* kick EH for boot probing */
5931 spin_lock_irqsave(ap->lock, flags);
5933 ehi->probe_mask |= ATA_ALL_DEVICES;
5934 ehi->action |= ATA_EH_RESET | ATA_EH_LPM;
5935 ehi->flags |= ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET;
5937 ap->pflags &= ~ATA_PFLAG_INITIALIZING;
5938 ap->pflags |= ATA_PFLAG_LOADING;
5939 ata_port_schedule_eh(ap);
5941 spin_unlock_irqrestore(ap->lock, flags);
5943 /* wait for EH to finish */
5944 ata_port_wait_eh(ap);
5946 DPRINTK("ata%u: bus probe begin\n", ap->print_id);
5947 rc = ata_bus_probe(ap);
5948 DPRINTK("ata%u: bus probe end\n", ap->print_id);
5951 /* FIXME: do something useful here?
5952 * Current libata behavior will
5953 * tear down everything when
5954 * the module is removed
5955 * or the h/w is unplugged.
5960 /* in order to keep device order, we need to synchronize at this point */
5961 async_synchronize_cookie(cookie);
5963 ata_scsi_scan_host(ap, 1);
5967 * ata_host_register - register initialized ATA host
5968 * @host: ATA host to register
5969 * @sht: template for SCSI host
5971 * Register initialized ATA host. @host is allocated using
5972 * ata_host_alloc() and fully initialized by LLD. This function
5973 * starts ports, registers @host with ATA and SCSI layers and
5974 * probe registered devices.
5977 * Inherited from calling layer (may sleep).
5980 * 0 on success, -errno otherwise.
5982 int ata_host_register(struct ata_host *host, struct scsi_host_template *sht)
5986 /* host must have been started */
5987 if (!(host->flags & ATA_HOST_STARTED)) {
5988 dev_printk(KERN_ERR, host->dev,
5989 "BUG: trying to register unstarted host\n");
5994 /* Blow away unused ports. This happens when LLD can't
5995 * determine the exact number of ports to allocate at
5998 for (i = host->n_ports; host->ports[i]; i++)
5999 kfree(host->ports[i]);
6001 /* give ports names and add SCSI hosts */
6002 for (i = 0; i < host->n_ports; i++)
6003 host->ports[i]->print_id = ata_print_id++;
6005 rc = ata_scsi_add_hosts(host, sht);
6009 /* associate with ACPI nodes */
6010 ata_acpi_associate(host);
6012 /* set cable, sata_spd_limit and report */
6013 for (i = 0; i < host->n_ports; i++) {
6014 struct ata_port *ap = host->ports[i];
6015 unsigned long xfer_mask;
6017 /* set SATA cable type if still unset */
6018 if (ap->cbl == ATA_CBL_NONE && (ap->flags & ATA_FLAG_SATA))
6019 ap->cbl = ATA_CBL_SATA;
6021 /* init sata_spd_limit to the current value */
6022 sata_link_init_spd(&ap->link);
6024 sata_link_init_spd(ap->slave_link);
6026 /* print per-port info to dmesg */
6027 xfer_mask = ata_pack_xfermask(ap->pio_mask, ap->mwdma_mask,
6030 if (!ata_port_is_dummy(ap)) {
6031 ata_port_printk(ap, KERN_INFO,
6032 "%cATA max %s %s\n",
6033 (ap->flags & ATA_FLAG_SATA) ? 'S' : 'P',
6034 ata_mode_string(xfer_mask),
6035 ap->link.eh_info.desc);
6036 ata_ehi_clear_desc(&ap->link.eh_info);
6038 ata_port_printk(ap, KERN_INFO, "DUMMY\n");
6041 /* perform each probe synchronously */
6042 DPRINTK("probe begin\n");
6043 for (i = 0; i < host->n_ports; i++) {
6044 struct ata_port *ap = host->ports[i];
6045 async_schedule(async_port_probe, ap);
6047 DPRINTK("probe end\n");
6053 * ata_host_activate - start host, request IRQ and register it
6054 * @host: target ATA host
6055 * @irq: IRQ to request
6056 * @irq_handler: irq_handler used when requesting IRQ
6057 * @irq_flags: irq_flags used when requesting IRQ
6058 * @sht: scsi_host_template to use when registering the host
6060 * After allocating an ATA host and initializing it, most libata
6061 * LLDs perform three steps to activate the host - start host,
6062 * request IRQ and register it. This helper takes necessasry
6063 * arguments and performs the three steps in one go.
6065 * An invalid IRQ skips the IRQ registration and expects the host to
6066 * have set polling mode on the port. In this case, @irq_handler
6070 * Inherited from calling layer (may sleep).
6073 * 0 on success, -errno otherwise.
6075 int ata_host_activate(struct ata_host *host, int irq,
6076 irq_handler_t irq_handler, unsigned long irq_flags,
6077 struct scsi_host_template *sht)
6081 rc = ata_host_start(host);
6085 /* Special case for polling mode */
6087 WARN_ON(irq_handler);
6088 return ata_host_register(host, sht);
6091 rc = devm_request_irq(host->dev, irq, irq_handler, irq_flags,
6092 dev_driver_string(host->dev), host);
6096 for (i = 0; i < host->n_ports; i++)
6097 ata_port_desc(host->ports[i], "irq %d", irq);
6099 rc = ata_host_register(host, sht);
6100 /* if failed, just free the IRQ and leave ports alone */
6102 devm_free_irq(host->dev, irq, host);
6108 * ata_port_detach - Detach ATA port in prepration of device removal
6109 * @ap: ATA port to be detached
6111 * Detach all ATA devices and the associated SCSI devices of @ap;
6112 * then, remove the associated SCSI host. @ap is guaranteed to
6113 * be quiescent on return from this function.
6116 * Kernel thread context (may sleep).
6118 static void ata_port_detach(struct ata_port *ap)
6120 unsigned long flags;
6122 if (!ap->ops->error_handler)
6125 /* tell EH we're leaving & flush EH */
6126 spin_lock_irqsave(ap->lock, flags);
6127 ap->pflags |= ATA_PFLAG_UNLOADING;
6128 ata_port_schedule_eh(ap);
6129 spin_unlock_irqrestore(ap->lock, flags);
6131 /* wait till EH commits suicide */
6132 ata_port_wait_eh(ap);
6134 /* it better be dead now */
6135 WARN_ON(!(ap->pflags & ATA_PFLAG_UNLOADED));
6137 cancel_rearming_delayed_work(&ap->hotplug_task);
6140 /* remove the associated SCSI host */
6141 scsi_remove_host(ap->scsi_host);
6145 * ata_host_detach - Detach all ports of an ATA host
6146 * @host: Host to detach
6148 * Detach all ports of @host.
6151 * Kernel thread context (may sleep).
6153 void ata_host_detach(struct ata_host *host)
6157 for (i = 0; i < host->n_ports; i++)
6158 ata_port_detach(host->ports[i]);
6160 /* the host is dead now, dissociate ACPI */
6161 ata_acpi_dissociate(host);
6167 * ata_pci_remove_one - PCI layer callback for device removal
6168 * @pdev: PCI device that was removed
6170 * PCI layer indicates to libata via this hook that hot-unplug or
6171 * module unload event has occurred. Detach all ports. Resource
6172 * release is handled via devres.
6175 * Inherited from PCI layer (may sleep).
6177 void ata_pci_remove_one(struct pci_dev *pdev)
6179 struct device *dev = &pdev->dev;
6180 struct ata_host *host = dev_get_drvdata(dev);
6182 ata_host_detach(host);
6185 /* move to PCI subsystem */
6186 int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits)
6188 unsigned long tmp = 0;
6190 switch (bits->width) {
6193 pci_read_config_byte(pdev, bits->reg, &tmp8);
6199 pci_read_config_word(pdev, bits->reg, &tmp16);
6205 pci_read_config_dword(pdev, bits->reg, &tmp32);
6216 return (tmp == bits->val) ? 1 : 0;
6220 void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg)
6222 pci_save_state(pdev);
6223 pci_disable_device(pdev);
6225 if (mesg.event & PM_EVENT_SLEEP)
6226 pci_set_power_state(pdev, PCI_D3hot);
6229 int ata_pci_device_do_resume(struct pci_dev *pdev)
6233 pci_set_power_state(pdev, PCI_D0);
6234 pci_restore_state(pdev);
6236 rc = pcim_enable_device(pdev);
6238 dev_printk(KERN_ERR, &pdev->dev,
6239 "failed to enable device after resume (%d)\n", rc);
6243 pci_set_master(pdev);
6247 int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg)
6249 struct ata_host *host = dev_get_drvdata(&pdev->dev);
6252 rc = ata_host_suspend(host, mesg);
6256 ata_pci_device_do_suspend(pdev, mesg);
6261 int ata_pci_device_resume(struct pci_dev *pdev)
6263 struct ata_host *host = dev_get_drvdata(&pdev->dev);
6266 rc = ata_pci_device_do_resume(pdev);
6268 ata_host_resume(host);
6271 #endif /* CONFIG_PM */
6273 #endif /* CONFIG_PCI */
6275 static int __init ata_parse_force_one(char **cur,
6276 struct ata_force_ent *force_ent,
6277 const char **reason)
6279 /* FIXME: Currently, there's no way to tag init const data and
6280 * using __initdata causes build failure on some versions of
6281 * gcc. Once __initdataconst is implemented, add const to the
6282 * following structure.
6284 static struct ata_force_param force_tbl[] __initdata = {
6285 { "40c", .cbl = ATA_CBL_PATA40 },
6286 { "80c", .cbl = ATA_CBL_PATA80 },
6287 { "short40c", .cbl = ATA_CBL_PATA40_SHORT },
6288 { "unk", .cbl = ATA_CBL_PATA_UNK },
6289 { "ign", .cbl = ATA_CBL_PATA_IGN },
6290 { "sata", .cbl = ATA_CBL_SATA },
6291 { "1.5Gbps", .spd_limit = 1 },
6292 { "3.0Gbps", .spd_limit = 2 },
6293 { "noncq", .horkage_on = ATA_HORKAGE_NONCQ },
6294 { "ncq", .horkage_off = ATA_HORKAGE_NONCQ },
6295 { "pio0", .xfer_mask = 1 << (ATA_SHIFT_PIO + 0) },
6296 { "pio1", .xfer_mask = 1 << (ATA_SHIFT_PIO + 1) },
6297 { "pio2", .xfer_mask = 1 << (ATA_SHIFT_PIO + 2) },
6298 { "pio3", .xfer_mask = 1 << (ATA_SHIFT_PIO + 3) },
6299 { "pio4", .xfer_mask = 1 << (ATA_SHIFT_PIO + 4) },
6300 { "pio5", .xfer_mask = 1 << (ATA_SHIFT_PIO + 5) },
6301 { "pio6", .xfer_mask = 1 << (ATA_SHIFT_PIO + 6) },
6302 { "mwdma0", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 0) },
6303 { "mwdma1", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 1) },
6304 { "mwdma2", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 2) },
6305 { "mwdma3", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 3) },
6306 { "mwdma4", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 4) },
6307 { "udma0", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 0) },
6308 { "udma16", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 0) },
6309 { "udma/16", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 0) },
6310 { "udma1", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 1) },
6311 { "udma25", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 1) },
6312 { "udma/25", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 1) },
6313 { "udma2", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 2) },
6314 { "udma33", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 2) },
6315 { "udma/33", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 2) },
6316 { "udma3", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 3) },
6317 { "udma44", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 3) },
6318 { "udma/44", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 3) },
6319 { "udma4", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 4) },
6320 { "udma66", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 4) },
6321 { "udma/66", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 4) },
6322 { "udma5", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 5) },
6323 { "udma100", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 5) },
6324 { "udma/100", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 5) },
6325 { "udma6", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 6) },
6326 { "udma133", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 6) },
6327 { "udma/133", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 6) },
6328 { "udma7", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 7) },
6329 { "nohrst", .lflags = ATA_LFLAG_NO_HRST },
6330 { "nosrst", .lflags = ATA_LFLAG_NO_SRST },
6331 { "norst", .lflags = ATA_LFLAG_NO_HRST | ATA_LFLAG_NO_SRST },
6333 char *start = *cur, *p = *cur;
6334 char *id, *val, *endp;
6335 const struct ata_force_param *match_fp = NULL;
6336 int nr_matches = 0, i;
6338 /* find where this param ends and update *cur */
6339 while (*p != '\0' && *p != ',')
6350 p = strchr(start, ':');
6352 val = strstrip(start);
6357 id = strstrip(start);
6358 val = strstrip(p + 1);
6361 p = strchr(id, '.');
6364 force_ent->device = simple_strtoul(p, &endp, 10);
6365 if (p == endp || *endp != '\0') {
6366 *reason = "invalid device";
6371 force_ent->port = simple_strtoul(id, &endp, 10);
6372 if (p == endp || *endp != '\0') {
6373 *reason = "invalid port/link";
6378 /* parse val, allow shortcuts so that both 1.5 and 1.5Gbps work */
6379 for (i = 0; i < ARRAY_SIZE(force_tbl); i++) {
6380 const struct ata_force_param *fp = &force_tbl[i];
6382 if (strncasecmp(val, fp->name, strlen(val)))
6388 if (strcasecmp(val, fp->name) == 0) {
6395 *reason = "unknown value";
6398 if (nr_matches > 1) {
6399 *reason = "ambigious value";
6403 force_ent->param = *match_fp;
6408 static void __init ata_parse_force_param(void)
6410 int idx = 0, size = 1;
6411 int last_port = -1, last_device = -1;
6412 char *p, *cur, *next;
6414 /* calculate maximum number of params and allocate force_tbl */
6415 for (p = ata_force_param_buf; *p; p++)
6419 ata_force_tbl = kzalloc(sizeof(ata_force_tbl[0]) * size, GFP_KERNEL);
6420 if (!ata_force_tbl) {
6421 printk(KERN_WARNING "ata: failed to extend force table, "
6422 "libata.force ignored\n");
6426 /* parse and populate the table */
6427 for (cur = ata_force_param_buf; *cur != '\0'; cur = next) {
6428 const char *reason = "";
6429 struct ata_force_ent te = { .port = -1, .device = -1 };
6432 if (ata_parse_force_one(&next, &te, &reason)) {
6433 printk(KERN_WARNING "ata: failed to parse force "
6434 "parameter \"%s\" (%s)\n",
6439 if (te.port == -1) {
6440 te.port = last_port;
6441 te.device = last_device;
6444 ata_force_tbl[idx++] = te;
6446 last_port = te.port;
6447 last_device = te.device;
6450 ata_force_tbl_size = idx;
6453 static int __init ata_init(void)
6455 ata_parse_force_param();
6457 ata_wq = create_workqueue("ata");
6459 goto free_force_tbl;
6461 ata_aux_wq = create_singlethread_workqueue("ata_aux");
6465 printk(KERN_DEBUG "libata version " DRV_VERSION " loaded.\n");
6469 destroy_workqueue(ata_wq);
6471 kfree(ata_force_tbl);
6475 static void __exit ata_exit(void)
6477 kfree(ata_force_tbl);
6478 destroy_workqueue(ata_wq);
6479 destroy_workqueue(ata_aux_wq);
6482 subsys_initcall(ata_init);
6483 module_exit(ata_exit);
6485 static unsigned long ratelimit_time;
6486 static DEFINE_SPINLOCK(ata_ratelimit_lock);
6488 int ata_ratelimit(void)
6491 unsigned long flags;
6493 spin_lock_irqsave(&ata_ratelimit_lock, flags);
6495 if (time_after(jiffies, ratelimit_time)) {
6497 ratelimit_time = jiffies + (HZ/5);
6501 spin_unlock_irqrestore(&ata_ratelimit_lock, flags);
6507 * ata_wait_register - wait until register value changes
6508 * @reg: IO-mapped register
6509 * @mask: Mask to apply to read register value
6510 * @val: Wait condition
6511 * @interval: polling interval in milliseconds
6512 * @timeout: timeout in milliseconds
6514 * Waiting for some bits of register to change is a common
6515 * operation for ATA controllers. This function reads 32bit LE
6516 * IO-mapped register @reg and tests for the following condition.
6518 * (*@reg & mask) != val
6520 * If the condition is met, it returns; otherwise, the process is
6521 * repeated after @interval_msec until timeout.
6524 * Kernel thread context (may sleep)
6527 * The final register value.
6529 u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val,
6530 unsigned long interval, unsigned long timeout)
6532 unsigned long deadline;
6535 tmp = ioread32(reg);
6537 /* Calculate timeout _after_ the first read to make sure
6538 * preceding writes reach the controller before starting to
6539 * eat away the timeout.
6541 deadline = ata_deadline(jiffies, timeout);
6543 while ((tmp & mask) == val && time_before(jiffies, deadline)) {
6545 tmp = ioread32(reg);
6554 static unsigned int ata_dummy_qc_issue(struct ata_queued_cmd *qc)
6556 return AC_ERR_SYSTEM;
6559 static void ata_dummy_error_handler(struct ata_port *ap)
6564 struct ata_port_operations ata_dummy_port_ops = {
6565 .qc_prep = ata_noop_qc_prep,
6566 .qc_issue = ata_dummy_qc_issue,
6567 .error_handler = ata_dummy_error_handler,
6570 const struct ata_port_info ata_dummy_port_info = {
6571 .port_ops = &ata_dummy_port_ops,
6575 * libata is essentially a library of internal helper functions for
6576 * low-level ATA host controller drivers. As such, the API/ABI is
6577 * likely to change as new drivers are added and updated.
6578 * Do not depend on ABI/API stability.
6580 EXPORT_SYMBOL_GPL(sata_deb_timing_normal);
6581 EXPORT_SYMBOL_GPL(sata_deb_timing_hotplug);
6582 EXPORT_SYMBOL_GPL(sata_deb_timing_long);
6583 EXPORT_SYMBOL_GPL(ata_base_port_ops);
6584 EXPORT_SYMBOL_GPL(sata_port_ops);
6585 EXPORT_SYMBOL_GPL(ata_dummy_port_ops);
6586 EXPORT_SYMBOL_GPL(ata_dummy_port_info);
6587 EXPORT_SYMBOL_GPL(ata_link_next);
6588 EXPORT_SYMBOL_GPL(ata_dev_next);
6589 EXPORT_SYMBOL_GPL(ata_std_bios_param);
6590 EXPORT_SYMBOL_GPL(ata_host_init);
6591 EXPORT_SYMBOL_GPL(ata_host_alloc);
6592 EXPORT_SYMBOL_GPL(ata_host_alloc_pinfo);
6593 EXPORT_SYMBOL_GPL(ata_slave_link_init);
6594 EXPORT_SYMBOL_GPL(ata_host_start);
6595 EXPORT_SYMBOL_GPL(ata_host_register);
6596 EXPORT_SYMBOL_GPL(ata_host_activate);
6597 EXPORT_SYMBOL_GPL(ata_host_detach);
6598 EXPORT_SYMBOL_GPL(ata_sg_init);
6599 EXPORT_SYMBOL_GPL(ata_qc_complete);
6600 EXPORT_SYMBOL_GPL(ata_qc_complete_multiple);
6601 EXPORT_SYMBOL_GPL(atapi_cmd_type);
6602 EXPORT_SYMBOL_GPL(ata_tf_to_fis);
6603 EXPORT_SYMBOL_GPL(ata_tf_from_fis);
6604 EXPORT_SYMBOL_GPL(ata_pack_xfermask);
6605 EXPORT_SYMBOL_GPL(ata_unpack_xfermask);
6606 EXPORT_SYMBOL_GPL(ata_xfer_mask2mode);
6607 EXPORT_SYMBOL_GPL(ata_xfer_mode2mask);
6608 EXPORT_SYMBOL_GPL(ata_xfer_mode2shift);
6609 EXPORT_SYMBOL_GPL(ata_mode_string);
6610 EXPORT_SYMBOL_GPL(ata_id_xfermask);
6611 EXPORT_SYMBOL_GPL(ata_port_start);
6612 EXPORT_SYMBOL_GPL(ata_do_set_mode);
6613 EXPORT_SYMBOL_GPL(ata_std_qc_defer);
6614 EXPORT_SYMBOL_GPL(ata_noop_qc_prep);
6615 EXPORT_SYMBOL_GPL(ata_port_probe);
6616 EXPORT_SYMBOL_GPL(ata_dev_disable);
6617 EXPORT_SYMBOL_GPL(sata_set_spd);
6618 EXPORT_SYMBOL_GPL(ata_wait_after_reset);
6619 EXPORT_SYMBOL_GPL(sata_link_debounce);
6620 EXPORT_SYMBOL_GPL(sata_link_resume);
6621 EXPORT_SYMBOL_GPL(ata_std_prereset);
6622 EXPORT_SYMBOL_GPL(sata_link_hardreset);
6623 EXPORT_SYMBOL_GPL(sata_std_hardreset);
6624 EXPORT_SYMBOL_GPL(ata_std_postreset);
6625 EXPORT_SYMBOL_GPL(ata_dev_classify);
6626 EXPORT_SYMBOL_GPL(ata_dev_pair);
6627 EXPORT_SYMBOL_GPL(ata_port_disable);
6628 EXPORT_SYMBOL_GPL(ata_ratelimit);
6629 EXPORT_SYMBOL_GPL(ata_wait_register);
6630 EXPORT_SYMBOL_GPL(ata_scsi_queuecmd);
6631 EXPORT_SYMBOL_GPL(ata_scsi_slave_config);
6632 EXPORT_SYMBOL_GPL(ata_scsi_slave_destroy);
6633 EXPORT_SYMBOL_GPL(ata_scsi_change_queue_depth);
6634 EXPORT_SYMBOL_GPL(sata_scr_valid);
6635 EXPORT_SYMBOL_GPL(sata_scr_read);
6636 EXPORT_SYMBOL_GPL(sata_scr_write);
6637 EXPORT_SYMBOL_GPL(sata_scr_write_flush);
6638 EXPORT_SYMBOL_GPL(ata_link_online);
6639 EXPORT_SYMBOL_GPL(ata_link_offline);
6641 EXPORT_SYMBOL_GPL(ata_host_suspend);
6642 EXPORT_SYMBOL_GPL(ata_host_resume);
6643 #endif /* CONFIG_PM */
6644 EXPORT_SYMBOL_GPL(ata_id_string);
6645 EXPORT_SYMBOL_GPL(ata_id_c_string);
6646 EXPORT_SYMBOL_GPL(ata_do_dev_read_id);
6647 EXPORT_SYMBOL_GPL(ata_scsi_simulate);
6649 EXPORT_SYMBOL_GPL(ata_pio_need_iordy);
6650 EXPORT_SYMBOL_GPL(ata_timing_find_mode);
6651 EXPORT_SYMBOL_GPL(ata_timing_compute);
6652 EXPORT_SYMBOL_GPL(ata_timing_merge);
6653 EXPORT_SYMBOL_GPL(ata_timing_cycle2mode);
6656 EXPORT_SYMBOL_GPL(pci_test_config_bits);
6657 EXPORT_SYMBOL_GPL(ata_pci_remove_one);
6659 EXPORT_SYMBOL_GPL(ata_pci_device_do_suspend);
6660 EXPORT_SYMBOL_GPL(ata_pci_device_do_resume);
6661 EXPORT_SYMBOL_GPL(ata_pci_device_suspend);
6662 EXPORT_SYMBOL_GPL(ata_pci_device_resume);
6663 #endif /* CONFIG_PM */
6664 #endif /* CONFIG_PCI */
6666 EXPORT_SYMBOL_GPL(__ata_ehi_push_desc);
6667 EXPORT_SYMBOL_GPL(ata_ehi_push_desc);
6668 EXPORT_SYMBOL_GPL(ata_ehi_clear_desc);
6669 EXPORT_SYMBOL_GPL(ata_port_desc);
6671 EXPORT_SYMBOL_GPL(ata_port_pbar_desc);
6672 #endif /* CONFIG_PCI */
6673 EXPORT_SYMBOL_GPL(ata_port_schedule_eh);
6674 EXPORT_SYMBOL_GPL(ata_link_abort);
6675 EXPORT_SYMBOL_GPL(ata_port_abort);
6676 EXPORT_SYMBOL_GPL(ata_port_freeze);
6677 EXPORT_SYMBOL_GPL(sata_async_notification);
6678 EXPORT_SYMBOL_GPL(ata_eh_freeze_port);
6679 EXPORT_SYMBOL_GPL(ata_eh_thaw_port);
6680 EXPORT_SYMBOL_GPL(ata_eh_qc_complete);
6681 EXPORT_SYMBOL_GPL(ata_eh_qc_retry);
6682 EXPORT_SYMBOL_GPL(ata_eh_analyze_ncq_error);
6683 EXPORT_SYMBOL_GPL(ata_do_eh);
6684 EXPORT_SYMBOL_GPL(ata_std_error_handler);
6686 EXPORT_SYMBOL_GPL(ata_cable_40wire);
6687 EXPORT_SYMBOL_GPL(ata_cable_80wire);
6688 EXPORT_SYMBOL_GPL(ata_cable_unknown);
6689 EXPORT_SYMBOL_GPL(ata_cable_ignore);
6690 EXPORT_SYMBOL_GPL(ata_cable_sata);