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 <linux/log2.h>
61 #include <linux/slab.h>
62 #include <scsi/scsi.h>
63 #include <scsi/scsi_cmnd.h>
64 #include <scsi/scsi_host.h>
65 #include <linux/libata.h>
66 #include <asm/byteorder.h>
67 #include <linux/cdrom.h>
68 #include <linux/ratelimit.h>
73 /* debounce timing parameters in msecs { interval, duration, timeout } */
74 const unsigned long sata_deb_timing_normal[] = { 5, 100, 2000 };
75 const unsigned long sata_deb_timing_hotplug[] = { 25, 500, 2000 };
76 const unsigned long sata_deb_timing_long[] = { 100, 2000, 5000 };
78 const struct ata_port_operations ata_base_port_ops = {
79 .prereset = ata_std_prereset,
80 .postreset = ata_std_postreset,
81 .error_handler = ata_std_error_handler,
84 const struct ata_port_operations sata_port_ops = {
85 .inherits = &ata_base_port_ops,
87 .qc_defer = ata_std_qc_defer,
88 .hardreset = sata_std_hardreset,
91 static unsigned int ata_dev_init_params(struct ata_device *dev,
92 u16 heads, u16 sectors);
93 static unsigned int ata_dev_set_xfermode(struct ata_device *dev);
94 static unsigned int ata_dev_set_feature(struct ata_device *dev,
95 u8 enable, u8 feature);
96 static void ata_dev_xfermask(struct ata_device *dev);
97 static unsigned long ata_dev_blacklisted(const struct ata_device *dev);
99 unsigned int ata_print_id = 1;
100 static struct workqueue_struct *ata_wq;
102 struct workqueue_struct *ata_aux_wq;
104 struct ata_force_param {
108 unsigned long xfer_mask;
109 unsigned int horkage_on;
110 unsigned int horkage_off;
114 struct ata_force_ent {
117 struct ata_force_param param;
120 static struct ata_force_ent *ata_force_tbl;
121 static int ata_force_tbl_size;
123 static char ata_force_param_buf[PAGE_SIZE] __initdata;
124 /* param_buf is thrown away after initialization, disallow read */
125 module_param_string(force, ata_force_param_buf, sizeof(ata_force_param_buf), 0);
126 MODULE_PARM_DESC(force, "Force ATA configurations including cable type, link speed and transfer mode (see Documentation/kernel-parameters.txt for details)");
128 static int atapi_enabled = 1;
129 module_param(atapi_enabled, int, 0444);
130 MODULE_PARM_DESC(atapi_enabled, "Enable discovery of ATAPI devices (0=off, 1=on [default])");
132 static int atapi_dmadir = 0;
133 module_param(atapi_dmadir, int, 0444);
134 MODULE_PARM_DESC(atapi_dmadir, "Enable ATAPI DMADIR bridge support (0=off [default], 1=on)");
136 int atapi_passthru16 = 1;
137 module_param(atapi_passthru16, int, 0444);
138 MODULE_PARM_DESC(atapi_passthru16, "Enable ATA_16 passthru for ATAPI devices (0=off, 1=on [default])");
141 module_param_named(fua, libata_fua, int, 0444);
142 MODULE_PARM_DESC(fua, "FUA support (0=off [default], 1=on)");
144 static int ata_ignore_hpa;
145 module_param_named(ignore_hpa, ata_ignore_hpa, int, 0644);
146 MODULE_PARM_DESC(ignore_hpa, "Ignore HPA limit (0=keep BIOS limits, 1=ignore limits, using full disk)");
148 static int libata_dma_mask = ATA_DMA_MASK_ATA|ATA_DMA_MASK_ATAPI|ATA_DMA_MASK_CFA;
149 module_param_named(dma, libata_dma_mask, int, 0444);
150 MODULE_PARM_DESC(dma, "DMA enable/disable (0x1==ATA, 0x2==ATAPI, 0x4==CF)");
152 static int ata_probe_timeout;
153 module_param(ata_probe_timeout, int, 0444);
154 MODULE_PARM_DESC(ata_probe_timeout, "Set ATA probing timeout (seconds)");
156 int libata_noacpi = 0;
157 module_param_named(noacpi, libata_noacpi, int, 0444);
158 MODULE_PARM_DESC(noacpi, "Disable the use of ACPI in probe/suspend/resume (0=off [default], 1=on)");
160 int libata_allow_tpm = 0;
161 module_param_named(allow_tpm, libata_allow_tpm, int, 0444);
162 MODULE_PARM_DESC(allow_tpm, "Permit the use of TPM commands (0=off [default], 1=on)");
164 MODULE_AUTHOR("Jeff Garzik");
165 MODULE_DESCRIPTION("Library module for ATA devices");
166 MODULE_LICENSE("GPL");
167 MODULE_VERSION(DRV_VERSION);
170 static bool ata_sstatus_online(u32 sstatus)
172 return (sstatus & 0xf) == 0x3;
176 * ata_link_next - link iteration helper
177 * @link: the previous link, NULL to start
178 * @ap: ATA port containing links to iterate
179 * @mode: iteration mode, one of ATA_LITER_*
182 * Host lock or EH context.
185 * Pointer to the next link.
187 struct ata_link *ata_link_next(struct ata_link *link, struct ata_port *ap,
188 enum ata_link_iter_mode mode)
190 BUG_ON(mode != ATA_LITER_EDGE &&
191 mode != ATA_LITER_PMP_FIRST && mode != ATA_LITER_HOST_FIRST);
193 /* NULL link indicates start of iteration */
197 case ATA_LITER_PMP_FIRST:
198 if (sata_pmp_attached(ap))
201 case ATA_LITER_HOST_FIRST:
205 /* we just iterated over the host link, what's next? */
206 if (link == &ap->link)
208 case ATA_LITER_HOST_FIRST:
209 if (sata_pmp_attached(ap))
212 case ATA_LITER_PMP_FIRST:
213 if (unlikely(ap->slave_link))
214 return ap->slave_link;
220 /* slave_link excludes PMP */
221 if (unlikely(link == ap->slave_link))
224 /* we were over a PMP link */
225 if (++link < ap->pmp_link + ap->nr_pmp_links)
228 if (mode == ATA_LITER_PMP_FIRST)
235 * ata_dev_next - device iteration helper
236 * @dev: the previous device, NULL to start
237 * @link: ATA link containing devices to iterate
238 * @mode: iteration mode, one of ATA_DITER_*
241 * Host lock or EH context.
244 * Pointer to the next device.
246 struct ata_device *ata_dev_next(struct ata_device *dev, struct ata_link *link,
247 enum ata_dev_iter_mode mode)
249 BUG_ON(mode != ATA_DITER_ENABLED && mode != ATA_DITER_ENABLED_REVERSE &&
250 mode != ATA_DITER_ALL && mode != ATA_DITER_ALL_REVERSE);
252 /* NULL dev indicates start of iteration */
255 case ATA_DITER_ENABLED:
259 case ATA_DITER_ENABLED_REVERSE:
260 case ATA_DITER_ALL_REVERSE:
261 dev = link->device + ata_link_max_devices(link) - 1;
266 /* move to the next one */
268 case ATA_DITER_ENABLED:
270 if (++dev < link->device + ata_link_max_devices(link))
273 case ATA_DITER_ENABLED_REVERSE:
274 case ATA_DITER_ALL_REVERSE:
275 if (--dev >= link->device)
281 if ((mode == ATA_DITER_ENABLED || mode == ATA_DITER_ENABLED_REVERSE) &&
282 !ata_dev_enabled(dev))
288 * ata_dev_phys_link - find physical link for a device
289 * @dev: ATA device to look up physical link for
291 * Look up physical link which @dev is attached to. Note that
292 * this is different from @dev->link only when @dev is on slave
293 * link. For all other cases, it's the same as @dev->link.
299 * Pointer to the found physical link.
301 struct ata_link *ata_dev_phys_link(struct ata_device *dev)
303 struct ata_port *ap = dev->link->ap;
309 return ap->slave_link;
313 * ata_force_cbl - force cable type according to libata.force
314 * @ap: ATA port of interest
316 * Force cable type according to libata.force and whine about it.
317 * The last entry which has matching port number is used, so it
318 * can be specified as part of device force parameters. For
319 * example, both "a:40c,1.00:udma4" and "1.00:40c,udma4" have the
325 void ata_force_cbl(struct ata_port *ap)
329 for (i = ata_force_tbl_size - 1; i >= 0; i--) {
330 const struct ata_force_ent *fe = &ata_force_tbl[i];
332 if (fe->port != -1 && fe->port != ap->print_id)
335 if (fe->param.cbl == ATA_CBL_NONE)
338 ap->cbl = fe->param.cbl;
339 ata_port_printk(ap, KERN_NOTICE,
340 "FORCE: cable set to %s\n", fe->param.name);
346 * ata_force_link_limits - force link limits according to libata.force
347 * @link: ATA link of interest
349 * Force link flags and SATA spd limit according to libata.force
350 * and whine about it. When only the port part is specified
351 * (e.g. 1:), the limit applies to all links connected to both
352 * the host link and all fan-out ports connected via PMP. If the
353 * device part is specified as 0 (e.g. 1.00:), it specifies the
354 * first fan-out link not the host link. Device number 15 always
355 * points to the host link whether PMP is attached or not. If the
356 * controller has slave link, device number 16 points to it.
361 static void ata_force_link_limits(struct ata_link *link)
363 bool did_spd = false;
364 int linkno = link->pmp;
367 if (ata_is_host_link(link))
370 for (i = ata_force_tbl_size - 1; i >= 0; i--) {
371 const struct ata_force_ent *fe = &ata_force_tbl[i];
373 if (fe->port != -1 && fe->port != link->ap->print_id)
376 if (fe->device != -1 && fe->device != linkno)
379 /* only honor the first spd limit */
380 if (!did_spd && fe->param.spd_limit) {
381 link->hw_sata_spd_limit = (1 << fe->param.spd_limit) - 1;
382 ata_link_printk(link, KERN_NOTICE,
383 "FORCE: PHY spd limit set to %s\n",
388 /* let lflags stack */
389 if (fe->param.lflags) {
390 link->flags |= fe->param.lflags;
391 ata_link_printk(link, KERN_NOTICE,
392 "FORCE: link flag 0x%x forced -> 0x%x\n",
393 fe->param.lflags, link->flags);
399 * ata_force_xfermask - force xfermask according to libata.force
400 * @dev: ATA device of interest
402 * Force xfer_mask according to libata.force and whine about it.
403 * For consistency with link selection, device number 15 selects
404 * the first device connected to the host link.
409 static void ata_force_xfermask(struct ata_device *dev)
411 int devno = dev->link->pmp + dev->devno;
412 int alt_devno = devno;
415 /* allow n.15/16 for devices attached to host port */
416 if (ata_is_host_link(dev->link))
419 for (i = ata_force_tbl_size - 1; i >= 0; i--) {
420 const struct ata_force_ent *fe = &ata_force_tbl[i];
421 unsigned long pio_mask, mwdma_mask, udma_mask;
423 if (fe->port != -1 && fe->port != dev->link->ap->print_id)
426 if (fe->device != -1 && fe->device != devno &&
427 fe->device != alt_devno)
430 if (!fe->param.xfer_mask)
433 ata_unpack_xfermask(fe->param.xfer_mask,
434 &pio_mask, &mwdma_mask, &udma_mask);
436 dev->udma_mask = udma_mask;
437 else if (mwdma_mask) {
439 dev->mwdma_mask = mwdma_mask;
443 dev->pio_mask = pio_mask;
446 ata_dev_printk(dev, KERN_NOTICE,
447 "FORCE: xfer_mask set to %s\n", fe->param.name);
453 * ata_force_horkage - force horkage according to libata.force
454 * @dev: ATA device of interest
456 * Force horkage according to libata.force and whine about it.
457 * For consistency with link selection, device number 15 selects
458 * the first device connected to the host link.
463 static void ata_force_horkage(struct ata_device *dev)
465 int devno = dev->link->pmp + dev->devno;
466 int alt_devno = devno;
469 /* allow n.15/16 for devices attached to host port */
470 if (ata_is_host_link(dev->link))
473 for (i = 0; i < ata_force_tbl_size; i++) {
474 const struct ata_force_ent *fe = &ata_force_tbl[i];
476 if (fe->port != -1 && fe->port != dev->link->ap->print_id)
479 if (fe->device != -1 && fe->device != devno &&
480 fe->device != alt_devno)
483 if (!(~dev->horkage & fe->param.horkage_on) &&
484 !(dev->horkage & fe->param.horkage_off))
487 dev->horkage |= fe->param.horkage_on;
488 dev->horkage &= ~fe->param.horkage_off;
490 ata_dev_printk(dev, KERN_NOTICE,
491 "FORCE: horkage modified (%s)\n", fe->param.name);
496 * atapi_cmd_type - Determine ATAPI command type from SCSI opcode
497 * @opcode: SCSI opcode
499 * Determine ATAPI command type from @opcode.
505 * ATAPI_{READ|WRITE|READ_CD|PASS_THRU|MISC}
507 int atapi_cmd_type(u8 opcode)
516 case GPCMD_WRITE_AND_VERIFY_10:
520 case GPCMD_READ_CD_MSF:
521 return ATAPI_READ_CD;
525 if (atapi_passthru16)
526 return ATAPI_PASS_THRU;
534 * ata_tf_to_fis - Convert ATA taskfile to SATA FIS structure
535 * @tf: Taskfile to convert
536 * @pmp: Port multiplier port
537 * @is_cmd: This FIS is for command
538 * @fis: Buffer into which data will output
540 * Converts a standard ATA taskfile to a Serial ATA
541 * FIS structure (Register - Host to Device).
544 * Inherited from caller.
546 void ata_tf_to_fis(const struct ata_taskfile *tf, u8 pmp, int is_cmd, u8 *fis)
548 fis[0] = 0x27; /* Register - Host to Device FIS */
549 fis[1] = pmp & 0xf; /* Port multiplier number*/
551 fis[1] |= (1 << 7); /* bit 7 indicates Command FIS */
553 fis[2] = tf->command;
554 fis[3] = tf->feature;
561 fis[8] = tf->hob_lbal;
562 fis[9] = tf->hob_lbam;
563 fis[10] = tf->hob_lbah;
564 fis[11] = tf->hob_feature;
567 fis[13] = tf->hob_nsect;
578 * ata_tf_from_fis - Convert SATA FIS to ATA taskfile
579 * @fis: Buffer from which data will be input
580 * @tf: Taskfile to output
582 * Converts a serial ATA FIS structure to a standard ATA taskfile.
585 * Inherited from caller.
588 void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf)
590 tf->command = fis[2]; /* status */
591 tf->feature = fis[3]; /* error */
598 tf->hob_lbal = fis[8];
599 tf->hob_lbam = fis[9];
600 tf->hob_lbah = fis[10];
603 tf->hob_nsect = fis[13];
606 static const u8 ata_rw_cmds[] = {
610 ATA_CMD_READ_MULTI_EXT,
611 ATA_CMD_WRITE_MULTI_EXT,
615 ATA_CMD_WRITE_MULTI_FUA_EXT,
619 ATA_CMD_PIO_READ_EXT,
620 ATA_CMD_PIO_WRITE_EXT,
633 ATA_CMD_WRITE_FUA_EXT
637 * ata_rwcmd_protocol - set taskfile r/w commands and protocol
638 * @tf: command to examine and configure
639 * @dev: device tf belongs to
641 * Examine the device configuration and tf->flags to calculate
642 * the proper read/write commands and protocol to use.
647 static int ata_rwcmd_protocol(struct ata_taskfile *tf, struct ata_device *dev)
651 int index, fua, lba48, write;
653 fua = (tf->flags & ATA_TFLAG_FUA) ? 4 : 0;
654 lba48 = (tf->flags & ATA_TFLAG_LBA48) ? 2 : 0;
655 write = (tf->flags & ATA_TFLAG_WRITE) ? 1 : 0;
657 if (dev->flags & ATA_DFLAG_PIO) {
658 tf->protocol = ATA_PROT_PIO;
659 index = dev->multi_count ? 0 : 8;
660 } else if (lba48 && (dev->link->ap->flags & ATA_FLAG_PIO_LBA48)) {
661 /* Unable to use DMA due to host limitation */
662 tf->protocol = ATA_PROT_PIO;
663 index = dev->multi_count ? 0 : 8;
665 tf->protocol = ATA_PROT_DMA;
669 cmd = ata_rw_cmds[index + fua + lba48 + write];
678 * ata_tf_read_block - Read block address from ATA taskfile
679 * @tf: ATA taskfile of interest
680 * @dev: ATA device @tf belongs to
685 * Read block address from @tf. This function can handle all
686 * three address formats - LBA, LBA48 and CHS. tf->protocol and
687 * flags select the address format to use.
690 * Block address read from @tf.
692 u64 ata_tf_read_block(struct ata_taskfile *tf, struct ata_device *dev)
696 if (tf->flags & ATA_TFLAG_LBA) {
697 if (tf->flags & ATA_TFLAG_LBA48) {
698 block |= (u64)tf->hob_lbah << 40;
699 block |= (u64)tf->hob_lbam << 32;
700 block |= (u64)tf->hob_lbal << 24;
702 block |= (tf->device & 0xf) << 24;
704 block |= tf->lbah << 16;
705 block |= tf->lbam << 8;
710 cyl = tf->lbam | (tf->lbah << 8);
711 head = tf->device & 0xf;
715 ata_dev_printk(dev, KERN_WARNING, "device reported "
716 "invalid CHS sector 0\n");
717 sect = 1; /* oh well */
720 block = (cyl * dev->heads + head) * dev->sectors + sect - 1;
727 * ata_build_rw_tf - Build ATA taskfile for given read/write request
728 * @tf: Target ATA taskfile
729 * @dev: ATA device @tf belongs to
730 * @block: Block address
731 * @n_block: Number of blocks
732 * @tf_flags: RW/FUA etc...
738 * Build ATA taskfile @tf for read/write request described by
739 * @block, @n_block, @tf_flags and @tag on @dev.
743 * 0 on success, -ERANGE if the request is too large for @dev,
744 * -EINVAL if the request is invalid.
746 int ata_build_rw_tf(struct ata_taskfile *tf, struct ata_device *dev,
747 u64 block, u32 n_block, unsigned int tf_flags,
750 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
751 tf->flags |= tf_flags;
753 if (ata_ncq_enabled(dev) && likely(tag != ATA_TAG_INTERNAL)) {
755 if (!lba_48_ok(block, n_block))
758 tf->protocol = ATA_PROT_NCQ;
759 tf->flags |= ATA_TFLAG_LBA | ATA_TFLAG_LBA48;
761 if (tf->flags & ATA_TFLAG_WRITE)
762 tf->command = ATA_CMD_FPDMA_WRITE;
764 tf->command = ATA_CMD_FPDMA_READ;
766 tf->nsect = tag << 3;
767 tf->hob_feature = (n_block >> 8) & 0xff;
768 tf->feature = n_block & 0xff;
770 tf->hob_lbah = (block >> 40) & 0xff;
771 tf->hob_lbam = (block >> 32) & 0xff;
772 tf->hob_lbal = (block >> 24) & 0xff;
773 tf->lbah = (block >> 16) & 0xff;
774 tf->lbam = (block >> 8) & 0xff;
775 tf->lbal = block & 0xff;
778 if (tf->flags & ATA_TFLAG_FUA)
779 tf->device |= 1 << 7;
780 } else if (dev->flags & ATA_DFLAG_LBA) {
781 tf->flags |= ATA_TFLAG_LBA;
783 if (lba_28_ok(block, n_block)) {
785 tf->device |= (block >> 24) & 0xf;
786 } else if (lba_48_ok(block, n_block)) {
787 if (!(dev->flags & ATA_DFLAG_LBA48))
791 tf->flags |= ATA_TFLAG_LBA48;
793 tf->hob_nsect = (n_block >> 8) & 0xff;
795 tf->hob_lbah = (block >> 40) & 0xff;
796 tf->hob_lbam = (block >> 32) & 0xff;
797 tf->hob_lbal = (block >> 24) & 0xff;
799 /* request too large even for LBA48 */
802 if (unlikely(ata_rwcmd_protocol(tf, dev) < 0))
805 tf->nsect = n_block & 0xff;
807 tf->lbah = (block >> 16) & 0xff;
808 tf->lbam = (block >> 8) & 0xff;
809 tf->lbal = block & 0xff;
811 tf->device |= ATA_LBA;
814 u32 sect, head, cyl, track;
816 /* The request -may- be too large for CHS addressing. */
817 if (!lba_28_ok(block, n_block))
820 if (unlikely(ata_rwcmd_protocol(tf, dev) < 0))
823 /* Convert LBA to CHS */
824 track = (u32)block / dev->sectors;
825 cyl = track / dev->heads;
826 head = track % dev->heads;
827 sect = (u32)block % dev->sectors + 1;
829 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
830 (u32)block, track, cyl, head, sect);
832 /* Check whether the converted CHS can fit.
836 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
839 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
850 * ata_pack_xfermask - Pack pio, mwdma and udma masks into xfer_mask
851 * @pio_mask: pio_mask
852 * @mwdma_mask: mwdma_mask
853 * @udma_mask: udma_mask
855 * Pack @pio_mask, @mwdma_mask and @udma_mask into a single
856 * unsigned int xfer_mask.
864 unsigned long ata_pack_xfermask(unsigned long pio_mask,
865 unsigned long mwdma_mask,
866 unsigned long udma_mask)
868 return ((pio_mask << ATA_SHIFT_PIO) & ATA_MASK_PIO) |
869 ((mwdma_mask << ATA_SHIFT_MWDMA) & ATA_MASK_MWDMA) |
870 ((udma_mask << ATA_SHIFT_UDMA) & ATA_MASK_UDMA);
874 * ata_unpack_xfermask - Unpack xfer_mask into pio, mwdma and udma masks
875 * @xfer_mask: xfer_mask to unpack
876 * @pio_mask: resulting pio_mask
877 * @mwdma_mask: resulting mwdma_mask
878 * @udma_mask: resulting udma_mask
880 * Unpack @xfer_mask into @pio_mask, @mwdma_mask and @udma_mask.
881 * Any NULL distination masks will be ignored.
883 void ata_unpack_xfermask(unsigned long xfer_mask, unsigned long *pio_mask,
884 unsigned long *mwdma_mask, unsigned long *udma_mask)
887 *pio_mask = (xfer_mask & ATA_MASK_PIO) >> ATA_SHIFT_PIO;
889 *mwdma_mask = (xfer_mask & ATA_MASK_MWDMA) >> ATA_SHIFT_MWDMA;
891 *udma_mask = (xfer_mask & ATA_MASK_UDMA) >> ATA_SHIFT_UDMA;
894 static const struct ata_xfer_ent {
898 { ATA_SHIFT_PIO, ATA_NR_PIO_MODES, XFER_PIO_0 },
899 { ATA_SHIFT_MWDMA, ATA_NR_MWDMA_MODES, XFER_MW_DMA_0 },
900 { ATA_SHIFT_UDMA, ATA_NR_UDMA_MODES, XFER_UDMA_0 },
905 * ata_xfer_mask2mode - Find matching XFER_* for the given xfer_mask
906 * @xfer_mask: xfer_mask of interest
908 * Return matching XFER_* value for @xfer_mask. Only the highest
909 * bit of @xfer_mask is considered.
915 * Matching XFER_* value, 0xff if no match found.
917 u8 ata_xfer_mask2mode(unsigned long xfer_mask)
919 int highbit = fls(xfer_mask) - 1;
920 const struct ata_xfer_ent *ent;
922 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
923 if (highbit >= ent->shift && highbit < ent->shift + ent->bits)
924 return ent->base + highbit - ent->shift;
929 * ata_xfer_mode2mask - Find matching xfer_mask for XFER_*
930 * @xfer_mode: XFER_* of interest
932 * Return matching xfer_mask for @xfer_mode.
938 * Matching xfer_mask, 0 if no match found.
940 unsigned long ata_xfer_mode2mask(u8 xfer_mode)
942 const struct ata_xfer_ent *ent;
944 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
945 if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits)
946 return ((2 << (ent->shift + xfer_mode - ent->base)) - 1)
947 & ~((1 << ent->shift) - 1);
952 * ata_xfer_mode2shift - Find matching xfer_shift for XFER_*
953 * @xfer_mode: XFER_* of interest
955 * Return matching xfer_shift for @xfer_mode.
961 * Matching xfer_shift, -1 if no match found.
963 int ata_xfer_mode2shift(unsigned long xfer_mode)
965 const struct ata_xfer_ent *ent;
967 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
968 if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits)
974 * ata_mode_string - convert xfer_mask to string
975 * @xfer_mask: mask of bits supported; only highest bit counts.
977 * Determine string which represents the highest speed
978 * (highest bit in @modemask).
984 * Constant C string representing highest speed listed in
985 * @mode_mask, or the constant C string "<n/a>".
987 const char *ata_mode_string(unsigned long xfer_mask)
989 static const char * const xfer_mode_str[] = {
1013 highbit = fls(xfer_mask) - 1;
1014 if (highbit >= 0 && highbit < ARRAY_SIZE(xfer_mode_str))
1015 return xfer_mode_str[highbit];
1019 static const char *sata_spd_string(unsigned int spd)
1021 static const char * const spd_str[] = {
1027 if (spd == 0 || (spd - 1) >= ARRAY_SIZE(spd_str))
1029 return spd_str[spd - 1];
1032 static int ata_dev_set_dipm(struct ata_device *dev, enum link_pm policy)
1034 struct ata_link *link = dev->link;
1035 struct ata_port *ap = link->ap;
1037 unsigned int err_mask;
1041 * disallow DIPM for drivers which haven't set
1042 * ATA_FLAG_IPM. This is because when DIPM is enabled,
1043 * phy ready will be set in the interrupt status on
1044 * state changes, which will cause some drivers to
1045 * think there are errors - additionally drivers will
1046 * need to disable hot plug.
1048 if (!(ap->flags & ATA_FLAG_IPM) || !ata_dev_enabled(dev)) {
1049 ap->pm_policy = NOT_AVAILABLE;
1054 * For DIPM, we will only enable it for the
1055 * min_power setting.
1057 * Why? Because Disks are too stupid to know that
1058 * If the host rejects a request to go to SLUMBER
1059 * they should retry at PARTIAL, and instead it
1060 * just would give up. So, for medium_power to
1061 * work at all, we need to only allow HIPM.
1063 rc = sata_scr_read(link, SCR_CONTROL, &scontrol);
1069 /* no restrictions on IPM transitions */
1070 scontrol &= ~(0x3 << 8);
1071 rc = sata_scr_write(link, SCR_CONTROL, scontrol);
1076 if (dev->flags & ATA_DFLAG_DIPM)
1077 err_mask = ata_dev_set_feature(dev,
1078 SETFEATURES_SATA_ENABLE, SATA_DIPM);
1081 /* allow IPM to PARTIAL */
1082 scontrol &= ~(0x1 << 8);
1083 scontrol |= (0x2 << 8);
1084 rc = sata_scr_write(link, SCR_CONTROL, scontrol);
1089 * we don't have to disable DIPM since IPM flags
1090 * disallow transitions to SLUMBER, which effectively
1091 * disable DIPM if it does not support PARTIAL
1095 case MAX_PERFORMANCE:
1096 /* disable all IPM transitions */
1097 scontrol |= (0x3 << 8);
1098 rc = sata_scr_write(link, SCR_CONTROL, scontrol);
1103 * we don't have to disable DIPM since IPM flags
1104 * disallow all transitions which effectively
1105 * disable DIPM anyway.
1110 /* FIXME: handle SET FEATURES failure */
1117 * ata_dev_enable_pm - enable SATA interface power management
1118 * @dev: device to enable power management
1119 * @policy: the link power management policy
1121 * Enable SATA Interface power management. This will enable
1122 * Device Interface Power Management (DIPM) for min_power
1123 * policy, and then call driver specific callbacks for
1124 * enabling Host Initiated Power management.
1127 * Returns: -EINVAL if IPM is not supported, 0 otherwise.
1129 void ata_dev_enable_pm(struct ata_device *dev, enum link_pm policy)
1132 struct ata_port *ap = dev->link->ap;
1134 /* set HIPM first, then DIPM */
1135 if (ap->ops->enable_pm)
1136 rc = ap->ops->enable_pm(ap, policy);
1139 rc = ata_dev_set_dipm(dev, policy);
1143 ap->pm_policy = MAX_PERFORMANCE;
1145 ap->pm_policy = policy;
1146 return /* rc */; /* hopefully we can use 'rc' eventually */
1151 * ata_dev_disable_pm - disable SATA interface power management
1152 * @dev: device to disable power management
1154 * Disable SATA Interface power management. This will disable
1155 * Device Interface Power Management (DIPM) without changing
1156 * policy, call driver specific callbacks for disabling Host
1157 * Initiated Power management.
1162 static void ata_dev_disable_pm(struct ata_device *dev)
1164 struct ata_port *ap = dev->link->ap;
1166 ata_dev_set_dipm(dev, MAX_PERFORMANCE);
1167 if (ap->ops->disable_pm)
1168 ap->ops->disable_pm(ap);
1170 #endif /* CONFIG_PM */
1172 void ata_lpm_schedule(struct ata_port *ap, enum link_pm policy)
1174 ap->pm_policy = policy;
1175 ap->link.eh_info.action |= ATA_EH_LPM;
1176 ap->link.eh_info.flags |= ATA_EHI_NO_AUTOPSY;
1177 ata_port_schedule_eh(ap);
1181 static void ata_lpm_enable(struct ata_host *host)
1183 struct ata_link *link;
1184 struct ata_port *ap;
1185 struct ata_device *dev;
1188 for (i = 0; i < host->n_ports; i++) {
1189 ap = host->ports[i];
1190 ata_for_each_link(link, ap, EDGE) {
1191 ata_for_each_dev(dev, link, ALL)
1192 ata_dev_disable_pm(dev);
1197 static void ata_lpm_disable(struct ata_host *host)
1201 for (i = 0; i < host->n_ports; i++) {
1202 struct ata_port *ap = host->ports[i];
1203 ata_lpm_schedule(ap, ap->pm_policy);
1206 #endif /* CONFIG_PM */
1209 * ata_dev_classify - determine device type based on ATA-spec signature
1210 * @tf: ATA taskfile register set for device to be identified
1212 * Determine from taskfile register contents whether a device is
1213 * ATA or ATAPI, as per "Signature and persistence" section
1214 * of ATA/PI spec (volume 1, sect 5.14).
1220 * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, %ATA_DEV_PMP or
1221 * %ATA_DEV_UNKNOWN the event of failure.
1223 unsigned int ata_dev_classify(const struct ata_taskfile *tf)
1225 /* Apple's open source Darwin code hints that some devices only
1226 * put a proper signature into the LBA mid/high registers,
1227 * So, we only check those. It's sufficient for uniqueness.
1229 * ATA/ATAPI-7 (d1532v1r1: Feb. 19, 2003) specified separate
1230 * signatures for ATA and ATAPI devices attached on SerialATA,
1231 * 0x3c/0xc3 and 0x69/0x96 respectively. However, SerialATA
1232 * spec has never mentioned about using different signatures
1233 * for ATA/ATAPI devices. Then, Serial ATA II: Port
1234 * Multiplier specification began to use 0x69/0x96 to identify
1235 * port multpliers and 0x3c/0xc3 to identify SEMB device.
1236 * ATA/ATAPI-7 dropped descriptions about 0x3c/0xc3 and
1237 * 0x69/0x96 shortly and described them as reserved for
1240 * We follow the current spec and consider that 0x69/0x96
1241 * identifies a port multiplier and 0x3c/0xc3 a SEMB device.
1242 * Unfortunately, WDC WD1600JS-62MHB5 (a hard drive) reports
1243 * SEMB signature. This is worked around in
1244 * ata_dev_read_id().
1246 if ((tf->lbam == 0) && (tf->lbah == 0)) {
1247 DPRINTK("found ATA device by sig\n");
1251 if ((tf->lbam == 0x14) && (tf->lbah == 0xeb)) {
1252 DPRINTK("found ATAPI device by sig\n");
1253 return ATA_DEV_ATAPI;
1256 if ((tf->lbam == 0x69) && (tf->lbah == 0x96)) {
1257 DPRINTK("found PMP device by sig\n");
1261 if ((tf->lbam == 0x3c) && (tf->lbah == 0xc3)) {
1262 DPRINTK("found SEMB device by sig (could be ATA device)\n");
1263 return ATA_DEV_SEMB;
1266 DPRINTK("unknown device\n");
1267 return ATA_DEV_UNKNOWN;
1271 * ata_id_string - Convert IDENTIFY DEVICE page into string
1272 * @id: IDENTIFY DEVICE results we will examine
1273 * @s: string into which data is output
1274 * @ofs: offset into identify device page
1275 * @len: length of string to return. must be an even number.
1277 * The strings in the IDENTIFY DEVICE page are broken up into
1278 * 16-bit chunks. Run through the string, and output each
1279 * 8-bit chunk linearly, regardless of platform.
1285 void ata_id_string(const u16 *id, unsigned char *s,
1286 unsigned int ofs, unsigned int len)
1307 * ata_id_c_string - Convert IDENTIFY DEVICE page into C string
1308 * @id: IDENTIFY DEVICE results we will examine
1309 * @s: string into which data is output
1310 * @ofs: offset into identify device page
1311 * @len: length of string to return. must be an odd number.
1313 * This function is identical to ata_id_string except that it
1314 * trims trailing spaces and terminates the resulting string with
1315 * null. @len must be actual maximum length (even number) + 1.
1320 void ata_id_c_string(const u16 *id, unsigned char *s,
1321 unsigned int ofs, unsigned int len)
1325 ata_id_string(id, s, ofs, len - 1);
1327 p = s + strnlen(s, len - 1);
1328 while (p > s && p[-1] == ' ')
1333 static u64 ata_id_n_sectors(const u16 *id)
1335 if (ata_id_has_lba(id)) {
1336 if (ata_id_has_lba48(id))
1337 return ata_id_u64(id, ATA_ID_LBA_CAPACITY_2);
1339 return ata_id_u32(id, ATA_ID_LBA_CAPACITY);
1341 if (ata_id_current_chs_valid(id))
1342 return id[ATA_ID_CUR_CYLS] * id[ATA_ID_CUR_HEADS] *
1343 id[ATA_ID_CUR_SECTORS];
1345 return id[ATA_ID_CYLS] * id[ATA_ID_HEADS] *
1350 u64 ata_tf_to_lba48(const struct ata_taskfile *tf)
1354 sectors |= ((u64)(tf->hob_lbah & 0xff)) << 40;
1355 sectors |= ((u64)(tf->hob_lbam & 0xff)) << 32;
1356 sectors |= ((u64)(tf->hob_lbal & 0xff)) << 24;
1357 sectors |= (tf->lbah & 0xff) << 16;
1358 sectors |= (tf->lbam & 0xff) << 8;
1359 sectors |= (tf->lbal & 0xff);
1364 u64 ata_tf_to_lba(const struct ata_taskfile *tf)
1368 sectors |= (tf->device & 0x0f) << 24;
1369 sectors |= (tf->lbah & 0xff) << 16;
1370 sectors |= (tf->lbam & 0xff) << 8;
1371 sectors |= (tf->lbal & 0xff);
1377 * ata_read_native_max_address - Read native max address
1378 * @dev: target device
1379 * @max_sectors: out parameter for the result native max address
1381 * Perform an LBA48 or LBA28 native size query upon the device in
1385 * 0 on success, -EACCES if command is aborted by the drive.
1386 * -EIO on other errors.
1388 static int ata_read_native_max_address(struct ata_device *dev, u64 *max_sectors)
1390 unsigned int err_mask;
1391 struct ata_taskfile tf;
1392 int lba48 = ata_id_has_lba48(dev->id);
1394 ata_tf_init(dev, &tf);
1396 /* always clear all address registers */
1397 tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
1400 tf.command = ATA_CMD_READ_NATIVE_MAX_EXT;
1401 tf.flags |= ATA_TFLAG_LBA48;
1403 tf.command = ATA_CMD_READ_NATIVE_MAX;
1405 tf.protocol |= ATA_PROT_NODATA;
1406 tf.device |= ATA_LBA;
1408 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
1410 ata_dev_printk(dev, KERN_WARNING, "failed to read native "
1411 "max address (err_mask=0x%x)\n", err_mask);
1412 if (err_mask == AC_ERR_DEV && (tf.feature & ATA_ABORTED))
1418 *max_sectors = ata_tf_to_lba48(&tf) + 1;
1420 *max_sectors = ata_tf_to_lba(&tf) + 1;
1421 if (dev->horkage & ATA_HORKAGE_HPA_SIZE)
1427 * ata_set_max_sectors - Set max sectors
1428 * @dev: target device
1429 * @new_sectors: new max sectors value to set for the device
1431 * Set max sectors of @dev to @new_sectors.
1434 * 0 on success, -EACCES if command is aborted or denied (due to
1435 * previous non-volatile SET_MAX) by the drive. -EIO on other
1438 static int ata_set_max_sectors(struct ata_device *dev, u64 new_sectors)
1440 unsigned int err_mask;
1441 struct ata_taskfile tf;
1442 int lba48 = ata_id_has_lba48(dev->id);
1446 ata_tf_init(dev, &tf);
1448 tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
1451 tf.command = ATA_CMD_SET_MAX_EXT;
1452 tf.flags |= ATA_TFLAG_LBA48;
1454 tf.hob_lbal = (new_sectors >> 24) & 0xff;
1455 tf.hob_lbam = (new_sectors >> 32) & 0xff;
1456 tf.hob_lbah = (new_sectors >> 40) & 0xff;
1458 tf.command = ATA_CMD_SET_MAX;
1460 tf.device |= (new_sectors >> 24) & 0xf;
1463 tf.protocol |= ATA_PROT_NODATA;
1464 tf.device |= ATA_LBA;
1466 tf.lbal = (new_sectors >> 0) & 0xff;
1467 tf.lbam = (new_sectors >> 8) & 0xff;
1468 tf.lbah = (new_sectors >> 16) & 0xff;
1470 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
1472 ata_dev_printk(dev, KERN_WARNING, "failed to set "
1473 "max address (err_mask=0x%x)\n", err_mask);
1474 if (err_mask == AC_ERR_DEV &&
1475 (tf.feature & (ATA_ABORTED | ATA_IDNF)))
1484 * ata_hpa_resize - Resize a device with an HPA set
1485 * @dev: Device to resize
1487 * Read the size of an LBA28 or LBA48 disk with HPA features and resize
1488 * it if required to the full size of the media. The caller must check
1489 * the drive has the HPA feature set enabled.
1492 * 0 on success, -errno on failure.
1494 static int ata_hpa_resize(struct ata_device *dev)
1496 struct ata_eh_context *ehc = &dev->link->eh_context;
1497 int print_info = ehc->i.flags & ATA_EHI_PRINTINFO;
1498 bool unlock_hpa = ata_ignore_hpa || dev->flags & ATA_DFLAG_UNLOCK_HPA;
1499 u64 sectors = ata_id_n_sectors(dev->id);
1503 /* do we need to do it? */
1504 if (dev->class != ATA_DEV_ATA ||
1505 !ata_id_has_lba(dev->id) || !ata_id_hpa_enabled(dev->id) ||
1506 (dev->horkage & ATA_HORKAGE_BROKEN_HPA))
1509 /* read native max address */
1510 rc = ata_read_native_max_address(dev, &native_sectors);
1512 /* If device aborted the command or HPA isn't going to
1513 * be unlocked, skip HPA resizing.
1515 if (rc == -EACCES || !unlock_hpa) {
1516 ata_dev_printk(dev, KERN_WARNING, "HPA support seems "
1517 "broken, skipping HPA handling\n");
1518 dev->horkage |= ATA_HORKAGE_BROKEN_HPA;
1520 /* we can continue if device aborted the command */
1527 dev->n_native_sectors = native_sectors;
1529 /* nothing to do? */
1530 if (native_sectors <= sectors || !unlock_hpa) {
1531 if (!print_info || native_sectors == sectors)
1534 if (native_sectors > sectors)
1535 ata_dev_printk(dev, KERN_INFO,
1536 "HPA detected: current %llu, native %llu\n",
1537 (unsigned long long)sectors,
1538 (unsigned long long)native_sectors);
1539 else if (native_sectors < sectors)
1540 ata_dev_printk(dev, KERN_WARNING,
1541 "native sectors (%llu) is smaller than "
1543 (unsigned long long)native_sectors,
1544 (unsigned long long)sectors);
1548 /* let's unlock HPA */
1549 rc = ata_set_max_sectors(dev, native_sectors);
1550 if (rc == -EACCES) {
1551 /* if device aborted the command, skip HPA resizing */
1552 ata_dev_printk(dev, KERN_WARNING, "device aborted resize "
1553 "(%llu -> %llu), skipping HPA handling\n",
1554 (unsigned long long)sectors,
1555 (unsigned long long)native_sectors);
1556 dev->horkage |= ATA_HORKAGE_BROKEN_HPA;
1561 /* re-read IDENTIFY data */
1562 rc = ata_dev_reread_id(dev, 0);
1564 ata_dev_printk(dev, KERN_ERR, "failed to re-read IDENTIFY "
1565 "data after HPA resizing\n");
1570 u64 new_sectors = ata_id_n_sectors(dev->id);
1571 ata_dev_printk(dev, KERN_INFO,
1572 "HPA unlocked: %llu -> %llu, native %llu\n",
1573 (unsigned long long)sectors,
1574 (unsigned long long)new_sectors,
1575 (unsigned long long)native_sectors);
1582 * ata_dump_id - IDENTIFY DEVICE info debugging output
1583 * @id: IDENTIFY DEVICE page to dump
1585 * Dump selected 16-bit words from the given IDENTIFY DEVICE
1592 static inline void ata_dump_id(const u16 *id)
1594 DPRINTK("49==0x%04x "
1604 DPRINTK("80==0x%04x "
1614 DPRINTK("88==0x%04x "
1621 * ata_id_xfermask - Compute xfermask from the given IDENTIFY data
1622 * @id: IDENTIFY data to compute xfer mask from
1624 * Compute the xfermask for this device. This is not as trivial
1625 * as it seems if we must consider early devices correctly.
1627 * FIXME: pre IDE drive timing (do we care ?).
1635 unsigned long ata_id_xfermask(const u16 *id)
1637 unsigned long pio_mask, mwdma_mask, udma_mask;
1639 /* Usual case. Word 53 indicates word 64 is valid */
1640 if (id[ATA_ID_FIELD_VALID] & (1 << 1)) {
1641 pio_mask = id[ATA_ID_PIO_MODES] & 0x03;
1645 /* If word 64 isn't valid then Word 51 high byte holds
1646 * the PIO timing number for the maximum. Turn it into
1649 u8 mode = (id[ATA_ID_OLD_PIO_MODES] >> 8) & 0xFF;
1650 if (mode < 5) /* Valid PIO range */
1651 pio_mask = (2 << mode) - 1;
1655 /* But wait.. there's more. Design your standards by
1656 * committee and you too can get a free iordy field to
1657 * process. However its the speeds not the modes that
1658 * are supported... Note drivers using the timing API
1659 * will get this right anyway
1663 mwdma_mask = id[ATA_ID_MWDMA_MODES] & 0x07;
1665 if (ata_id_is_cfa(id)) {
1667 * Process compact flash extended modes
1669 int pio = (id[ATA_ID_CFA_MODES] >> 0) & 0x7;
1670 int dma = (id[ATA_ID_CFA_MODES] >> 3) & 0x7;
1673 pio_mask |= (1 << 5);
1675 pio_mask |= (1 << 6);
1677 mwdma_mask |= (1 << 3);
1679 mwdma_mask |= (1 << 4);
1683 if (id[ATA_ID_FIELD_VALID] & (1 << 2))
1684 udma_mask = id[ATA_ID_UDMA_MODES] & 0xff;
1686 return ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask);
1690 * ata_pio_queue_task - Queue port_task
1691 * @ap: The ata_port to queue port_task for
1692 * @data: data for @fn to use
1693 * @delay: delay time in msecs for workqueue function
1695 * Schedule @fn(@data) for execution after @delay jiffies using
1696 * port_task. There is one port_task per port and it's the
1697 * user(low level driver)'s responsibility to make sure that only
1698 * one task is active at any given time.
1700 * libata core layer takes care of synchronization between
1701 * port_task and EH. ata_pio_queue_task() may be ignored for EH
1705 * Inherited from caller.
1707 void ata_pio_queue_task(struct ata_port *ap, void *data, unsigned long delay)
1709 ap->port_task_data = data;
1711 /* may fail if ata_port_flush_task() in progress */
1712 queue_delayed_work(ata_wq, &ap->port_task, msecs_to_jiffies(delay));
1716 * ata_port_flush_task - Flush port_task
1717 * @ap: The ata_port to flush port_task for
1719 * After this function completes, port_task is guranteed not to
1720 * be running or scheduled.
1723 * Kernel thread context (may sleep)
1725 void ata_port_flush_task(struct ata_port *ap)
1729 cancel_rearming_delayed_work(&ap->port_task);
1731 if (ata_msg_ctl(ap))
1732 ata_port_printk(ap, KERN_DEBUG, "%s: EXIT\n", __func__);
1735 static void ata_qc_complete_internal(struct ata_queued_cmd *qc)
1737 struct completion *waiting = qc->private_data;
1743 * ata_exec_internal_sg - execute libata internal command
1744 * @dev: Device to which the command is sent
1745 * @tf: Taskfile registers for the command and the result
1746 * @cdb: CDB for packet command
1747 * @dma_dir: Data tranfer direction of the command
1748 * @sgl: sg list for the data buffer of the command
1749 * @n_elem: Number of sg entries
1750 * @timeout: Timeout in msecs (0 for default)
1752 * Executes libata internal command with timeout. @tf contains
1753 * command on entry and result on return. Timeout and error
1754 * conditions are reported via return value. No recovery action
1755 * is taken after a command times out. It's caller's duty to
1756 * clean up after timeout.
1759 * None. Should be called with kernel context, might sleep.
1762 * Zero on success, AC_ERR_* mask on failure
1764 unsigned ata_exec_internal_sg(struct ata_device *dev,
1765 struct ata_taskfile *tf, const u8 *cdb,
1766 int dma_dir, struct scatterlist *sgl,
1767 unsigned int n_elem, unsigned long timeout)
1769 struct ata_link *link = dev->link;
1770 struct ata_port *ap = link->ap;
1771 u8 command = tf->command;
1772 int auto_timeout = 0;
1773 struct ata_queued_cmd *qc;
1774 unsigned int tag, preempted_tag;
1775 u32 preempted_sactive, preempted_qc_active;
1776 int preempted_nr_active_links;
1777 DECLARE_COMPLETION_ONSTACK(wait);
1778 unsigned long flags;
1779 unsigned int err_mask;
1782 spin_lock_irqsave(ap->lock, flags);
1784 /* no internal command while frozen */
1785 if (ap->pflags & ATA_PFLAG_FROZEN) {
1786 spin_unlock_irqrestore(ap->lock, flags);
1787 return AC_ERR_SYSTEM;
1790 /* initialize internal qc */
1792 /* XXX: Tag 0 is used for drivers with legacy EH as some
1793 * drivers choke if any other tag is given. This breaks
1794 * ata_tag_internal() test for those drivers. Don't use new
1795 * EH stuff without converting to it.
1797 if (ap->ops->error_handler)
1798 tag = ATA_TAG_INTERNAL;
1802 if (test_and_set_bit(tag, &ap->qc_allocated))
1804 qc = __ata_qc_from_tag(ap, tag);
1812 preempted_tag = link->active_tag;
1813 preempted_sactive = link->sactive;
1814 preempted_qc_active = ap->qc_active;
1815 preempted_nr_active_links = ap->nr_active_links;
1816 link->active_tag = ATA_TAG_POISON;
1819 ap->nr_active_links = 0;
1821 /* prepare & issue qc */
1824 memcpy(qc->cdb, cdb, ATAPI_CDB_LEN);
1825 qc->flags |= ATA_QCFLAG_RESULT_TF;
1826 qc->dma_dir = dma_dir;
1827 if (dma_dir != DMA_NONE) {
1828 unsigned int i, buflen = 0;
1829 struct scatterlist *sg;
1831 for_each_sg(sgl, sg, n_elem, i)
1832 buflen += sg->length;
1834 ata_sg_init(qc, sgl, n_elem);
1835 qc->nbytes = buflen;
1838 qc->private_data = &wait;
1839 qc->complete_fn = ata_qc_complete_internal;
1843 spin_unlock_irqrestore(ap->lock, flags);
1846 if (ata_probe_timeout)
1847 timeout = ata_probe_timeout * 1000;
1849 timeout = ata_internal_cmd_timeout(dev, command);
1854 rc = wait_for_completion_timeout(&wait, msecs_to_jiffies(timeout));
1856 ata_port_flush_task(ap);
1859 spin_lock_irqsave(ap->lock, flags);
1861 /* We're racing with irq here. If we lose, the
1862 * following test prevents us from completing the qc
1863 * twice. If we win, the port is frozen and will be
1864 * cleaned up by ->post_internal_cmd().
1866 if (qc->flags & ATA_QCFLAG_ACTIVE) {
1867 qc->err_mask |= AC_ERR_TIMEOUT;
1869 if (ap->ops->error_handler)
1870 ata_port_freeze(ap);
1872 ata_qc_complete(qc);
1874 if (ata_msg_warn(ap))
1875 ata_dev_printk(dev, KERN_WARNING,
1876 "qc timeout (cmd 0x%x)\n", command);
1879 spin_unlock_irqrestore(ap->lock, flags);
1882 /* do post_internal_cmd */
1883 if (ap->ops->post_internal_cmd)
1884 ap->ops->post_internal_cmd(qc);
1886 /* perform minimal error analysis */
1887 if (qc->flags & ATA_QCFLAG_FAILED) {
1888 if (qc->result_tf.command & (ATA_ERR | ATA_DF))
1889 qc->err_mask |= AC_ERR_DEV;
1892 qc->err_mask |= AC_ERR_OTHER;
1894 if (qc->err_mask & ~AC_ERR_OTHER)
1895 qc->err_mask &= ~AC_ERR_OTHER;
1899 spin_lock_irqsave(ap->lock, flags);
1901 *tf = qc->result_tf;
1902 err_mask = qc->err_mask;
1905 link->active_tag = preempted_tag;
1906 link->sactive = preempted_sactive;
1907 ap->qc_active = preempted_qc_active;
1908 ap->nr_active_links = preempted_nr_active_links;
1910 spin_unlock_irqrestore(ap->lock, flags);
1912 if ((err_mask & AC_ERR_TIMEOUT) && auto_timeout)
1913 ata_internal_cmd_timed_out(dev, command);
1919 * ata_exec_internal - execute libata internal command
1920 * @dev: Device to which the command is sent
1921 * @tf: Taskfile registers for the command and the result
1922 * @cdb: CDB for packet command
1923 * @dma_dir: Data tranfer direction of the command
1924 * @buf: Data buffer of the command
1925 * @buflen: Length of data buffer
1926 * @timeout: Timeout in msecs (0 for default)
1928 * Wrapper around ata_exec_internal_sg() which takes simple
1929 * buffer instead of sg list.
1932 * None. Should be called with kernel context, might sleep.
1935 * Zero on success, AC_ERR_* mask on failure
1937 unsigned ata_exec_internal(struct ata_device *dev,
1938 struct ata_taskfile *tf, const u8 *cdb,
1939 int dma_dir, void *buf, unsigned int buflen,
1940 unsigned long timeout)
1942 struct scatterlist *psg = NULL, sg;
1943 unsigned int n_elem = 0;
1945 if (dma_dir != DMA_NONE) {
1947 sg_init_one(&sg, buf, buflen);
1952 return ata_exec_internal_sg(dev, tf, cdb, dma_dir, psg, n_elem,
1957 * ata_do_simple_cmd - execute simple internal command
1958 * @dev: Device to which the command is sent
1959 * @cmd: Opcode to execute
1961 * Execute a 'simple' command, that only consists of the opcode
1962 * 'cmd' itself, without filling any other registers
1965 * Kernel thread context (may sleep).
1968 * Zero on success, AC_ERR_* mask on failure
1970 unsigned int ata_do_simple_cmd(struct ata_device *dev, u8 cmd)
1972 struct ata_taskfile tf;
1974 ata_tf_init(dev, &tf);
1977 tf.flags |= ATA_TFLAG_DEVICE;
1978 tf.protocol = ATA_PROT_NODATA;
1980 return ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
1984 * ata_pio_need_iordy - check if iordy needed
1987 * Check if the current speed of the device requires IORDY. Used
1988 * by various controllers for chip configuration.
1990 unsigned int ata_pio_need_iordy(const struct ata_device *adev)
1992 /* Don't set IORDY if we're preparing for reset. IORDY may
1993 * lead to controller lock up on certain controllers if the
1994 * port is not occupied. See bko#11703 for details.
1996 if (adev->link->ap->pflags & ATA_PFLAG_RESETTING)
1998 /* Controller doesn't support IORDY. Probably a pointless
1999 * check as the caller should know this.
2001 if (adev->link->ap->flags & ATA_FLAG_NO_IORDY)
2003 /* CF spec. r4.1 Table 22 says no iordy on PIO5 and PIO6. */
2004 if (ata_id_is_cfa(adev->id)
2005 && (adev->pio_mode == XFER_PIO_5 || adev->pio_mode == XFER_PIO_6))
2007 /* PIO3 and higher it is mandatory */
2008 if (adev->pio_mode > XFER_PIO_2)
2010 /* We turn it on when possible */
2011 if (ata_id_has_iordy(adev->id))
2017 * ata_pio_mask_no_iordy - Return the non IORDY mask
2020 * Compute the highest mode possible if we are not using iordy. Return
2021 * -1 if no iordy mode is available.
2023 static u32 ata_pio_mask_no_iordy(const struct ata_device *adev)
2025 /* If we have no drive specific rule, then PIO 2 is non IORDY */
2026 if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE */
2027 u16 pio = adev->id[ATA_ID_EIDE_PIO];
2028 /* Is the speed faster than the drive allows non IORDY ? */
2030 /* This is cycle times not frequency - watch the logic! */
2031 if (pio > 240) /* PIO2 is 240nS per cycle */
2032 return 3 << ATA_SHIFT_PIO;
2033 return 7 << ATA_SHIFT_PIO;
2036 return 3 << ATA_SHIFT_PIO;
2040 * ata_do_dev_read_id - default ID read method
2042 * @tf: proposed taskfile
2045 * Issue the identify taskfile and hand back the buffer containing
2046 * identify data. For some RAID controllers and for pre ATA devices
2047 * this function is wrapped or replaced by the driver
2049 unsigned int ata_do_dev_read_id(struct ata_device *dev,
2050 struct ata_taskfile *tf, u16 *id)
2052 return ata_exec_internal(dev, tf, NULL, DMA_FROM_DEVICE,
2053 id, sizeof(id[0]) * ATA_ID_WORDS, 0);
2057 * ata_dev_read_id - Read ID data from the specified device
2058 * @dev: target device
2059 * @p_class: pointer to class of the target device (may be changed)
2060 * @flags: ATA_READID_* flags
2061 * @id: buffer to read IDENTIFY data into
2063 * Read ID data from the specified device. ATA_CMD_ID_ATA is
2064 * performed on ATA devices and ATA_CMD_ID_ATAPI on ATAPI
2065 * devices. This function also issues ATA_CMD_INIT_DEV_PARAMS
2066 * for pre-ATA4 drives.
2068 * FIXME: ATA_CMD_ID_ATA is optional for early drives and right
2069 * now we abort if we hit that case.
2072 * Kernel thread context (may sleep)
2075 * 0 on success, -errno otherwise.
2077 int ata_dev_read_id(struct ata_device *dev, unsigned int *p_class,
2078 unsigned int flags, u16 *id)
2080 struct ata_port *ap = dev->link->ap;
2081 unsigned int class = *p_class;
2082 struct ata_taskfile tf;
2083 unsigned int err_mask = 0;
2085 bool is_semb = class == ATA_DEV_SEMB;
2086 int may_fallback = 1, tried_spinup = 0;
2089 if (ata_msg_ctl(ap))
2090 ata_dev_printk(dev, KERN_DEBUG, "%s: ENTER\n", __func__);
2093 ata_tf_init(dev, &tf);
2097 class = ATA_DEV_ATA; /* some hard drives report SEMB sig */
2099 tf.command = ATA_CMD_ID_ATA;
2102 tf.command = ATA_CMD_ID_ATAPI;
2106 reason = "unsupported class";
2110 tf.protocol = ATA_PROT_PIO;
2112 /* Some devices choke if TF registers contain garbage. Make
2113 * sure those are properly initialized.
2115 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2117 /* Device presence detection is unreliable on some
2118 * controllers. Always poll IDENTIFY if available.
2120 tf.flags |= ATA_TFLAG_POLLING;
2122 if (ap->ops->read_id)
2123 err_mask = ap->ops->read_id(dev, &tf, id);
2125 err_mask = ata_do_dev_read_id(dev, &tf, id);
2128 if (err_mask & AC_ERR_NODEV_HINT) {
2129 ata_dev_printk(dev, KERN_DEBUG,
2130 "NODEV after polling detection\n");
2135 ata_dev_printk(dev, KERN_INFO, "IDENTIFY failed on "
2136 "device w/ SEMB sig, disabled\n");
2137 /* SEMB is not supported yet */
2138 *p_class = ATA_DEV_SEMB_UNSUP;
2142 if ((err_mask == AC_ERR_DEV) && (tf.feature & ATA_ABORTED)) {
2143 /* Device or controller might have reported
2144 * the wrong device class. Give a shot at the
2145 * other IDENTIFY if the current one is
2146 * aborted by the device.
2151 if (class == ATA_DEV_ATA)
2152 class = ATA_DEV_ATAPI;
2154 class = ATA_DEV_ATA;
2158 /* Control reaches here iff the device aborted
2159 * both flavors of IDENTIFYs which happens
2160 * sometimes with phantom devices.
2162 ata_dev_printk(dev, KERN_DEBUG,
2163 "both IDENTIFYs aborted, assuming NODEV\n");
2168 reason = "I/O error";
2172 /* Falling back doesn't make sense if ID data was read
2173 * successfully at least once.
2177 swap_buf_le16(id, ATA_ID_WORDS);
2181 reason = "device reports invalid type";
2183 if (class == ATA_DEV_ATA) {
2184 if (!ata_id_is_ata(id) && !ata_id_is_cfa(id))
2187 if (ata_id_is_ata(id))
2191 if (!tried_spinup && (id[2] == 0x37c8 || id[2] == 0x738c)) {
2194 * Drive powered-up in standby mode, and requires a specific
2195 * SET_FEATURES spin-up subcommand before it will accept
2196 * anything other than the original IDENTIFY command.
2198 err_mask = ata_dev_set_feature(dev, SETFEATURES_SPINUP, 0);
2199 if (err_mask && id[2] != 0x738c) {
2201 reason = "SPINUP failed";
2205 * If the drive initially returned incomplete IDENTIFY info,
2206 * we now must reissue the IDENTIFY command.
2208 if (id[2] == 0x37c8)
2212 if ((flags & ATA_READID_POSTRESET) && class == ATA_DEV_ATA) {
2214 * The exact sequence expected by certain pre-ATA4 drives is:
2216 * IDENTIFY (optional in early ATA)
2217 * INITIALIZE DEVICE PARAMETERS (later IDE and ATA)
2219 * Some drives were very specific about that exact sequence.
2221 * Note that ATA4 says lba is mandatory so the second check
2222 * should never trigger.
2224 if (ata_id_major_version(id) < 4 || !ata_id_has_lba(id)) {
2225 err_mask = ata_dev_init_params(dev, id[3], id[6]);
2228 reason = "INIT_DEV_PARAMS failed";
2232 /* current CHS translation info (id[53-58]) might be
2233 * changed. reread the identify device info.
2235 flags &= ~ATA_READID_POSTRESET;
2245 if (ata_msg_warn(ap))
2246 ata_dev_printk(dev, KERN_WARNING, "failed to IDENTIFY "
2247 "(%s, err_mask=0x%x)\n", reason, err_mask);
2251 static int ata_do_link_spd_horkage(struct ata_device *dev)
2253 struct ata_link *plink = ata_dev_phys_link(dev);
2254 u32 target, target_limit;
2256 if (!sata_scr_valid(plink))
2259 if (dev->horkage & ATA_HORKAGE_1_5_GBPS)
2264 target_limit = (1 << target) - 1;
2266 /* if already on stricter limit, no need to push further */
2267 if (plink->sata_spd_limit <= target_limit)
2270 plink->sata_spd_limit = target_limit;
2272 /* Request another EH round by returning -EAGAIN if link is
2273 * going faster than the target speed. Forward progress is
2274 * guaranteed by setting sata_spd_limit to target_limit above.
2276 if (plink->sata_spd > target) {
2277 ata_dev_printk(dev, KERN_INFO,
2278 "applying link speed limit horkage to %s\n",
2279 sata_spd_string(target));
2285 static inline u8 ata_dev_knobble(struct ata_device *dev)
2287 struct ata_port *ap = dev->link->ap;
2289 if (ata_dev_blacklisted(dev) & ATA_HORKAGE_BRIDGE_OK)
2292 return ((ap->cbl == ATA_CBL_SATA) && (!ata_id_is_sata(dev->id)));
2295 static int ata_dev_config_ncq(struct ata_device *dev,
2296 char *desc, size_t desc_sz)
2298 struct ata_port *ap = dev->link->ap;
2299 int hdepth = 0, ddepth = ata_id_queue_depth(dev->id);
2300 unsigned int err_mask;
2303 if (!ata_id_has_ncq(dev->id)) {
2307 if (dev->horkage & ATA_HORKAGE_NONCQ) {
2308 snprintf(desc, desc_sz, "NCQ (not used)");
2311 if (ap->flags & ATA_FLAG_NCQ) {
2312 hdepth = min(ap->scsi_host->can_queue, ATA_MAX_QUEUE - 1);
2313 dev->flags |= ATA_DFLAG_NCQ;
2316 if (!(dev->horkage & ATA_HORKAGE_BROKEN_FPDMA_AA) &&
2317 (ap->flags & ATA_FLAG_FPDMA_AA) &&
2318 ata_id_has_fpdma_aa(dev->id)) {
2319 err_mask = ata_dev_set_feature(dev, SETFEATURES_SATA_ENABLE,
2322 ata_dev_printk(dev, KERN_ERR, "failed to enable AA"
2323 "(error_mask=0x%x)\n", err_mask);
2324 if (err_mask != AC_ERR_DEV) {
2325 dev->horkage |= ATA_HORKAGE_BROKEN_FPDMA_AA;
2332 if (hdepth >= ddepth)
2333 snprintf(desc, desc_sz, "NCQ (depth %d)%s", ddepth, aa_desc);
2335 snprintf(desc, desc_sz, "NCQ (depth %d/%d)%s", hdepth,
2341 * ata_dev_configure - Configure the specified ATA/ATAPI device
2342 * @dev: Target device to configure
2344 * Configure @dev according to @dev->id. Generic and low-level
2345 * driver specific fixups are also applied.
2348 * Kernel thread context (may sleep)
2351 * 0 on success, -errno otherwise
2353 int ata_dev_configure(struct ata_device *dev)
2355 struct ata_port *ap = dev->link->ap;
2356 struct ata_eh_context *ehc = &dev->link->eh_context;
2357 int print_info = ehc->i.flags & ATA_EHI_PRINTINFO;
2358 const u16 *id = dev->id;
2359 unsigned long xfer_mask;
2360 char revbuf[7]; /* XYZ-99\0 */
2361 char fwrevbuf[ATA_ID_FW_REV_LEN+1];
2362 char modelbuf[ATA_ID_PROD_LEN+1];
2365 if (!ata_dev_enabled(dev) && ata_msg_info(ap)) {
2366 ata_dev_printk(dev, KERN_INFO, "%s: ENTER/EXIT -- nodev\n",
2371 if (ata_msg_probe(ap))
2372 ata_dev_printk(dev, KERN_DEBUG, "%s: ENTER\n", __func__);
2375 dev->horkage |= ata_dev_blacklisted(dev);
2376 ata_force_horkage(dev);
2378 if (dev->horkage & ATA_HORKAGE_DISABLE) {
2379 ata_dev_printk(dev, KERN_INFO,
2380 "unsupported device, disabling\n");
2381 ata_dev_disable(dev);
2385 if ((!atapi_enabled || (ap->flags & ATA_FLAG_NO_ATAPI)) &&
2386 dev->class == ATA_DEV_ATAPI) {
2387 ata_dev_printk(dev, KERN_WARNING,
2388 "WARNING: ATAPI is %s, device ignored.\n",
2389 atapi_enabled ? "not supported with this driver"
2391 ata_dev_disable(dev);
2395 rc = ata_do_link_spd_horkage(dev);
2399 /* let ACPI work its magic */
2400 rc = ata_acpi_on_devcfg(dev);
2404 /* massage HPA, do it early as it might change IDENTIFY data */
2405 rc = ata_hpa_resize(dev);
2409 /* print device capabilities */
2410 if (ata_msg_probe(ap))
2411 ata_dev_printk(dev, KERN_DEBUG,
2412 "%s: cfg 49:%04x 82:%04x 83:%04x 84:%04x "
2413 "85:%04x 86:%04x 87:%04x 88:%04x\n",
2415 id[49], id[82], id[83], id[84],
2416 id[85], id[86], id[87], id[88]);
2418 /* initialize to-be-configured parameters */
2419 dev->flags &= ~ATA_DFLAG_CFG_MASK;
2420 dev->max_sectors = 0;
2426 dev->multi_count = 0;
2429 * common ATA, ATAPI feature tests
2432 /* find max transfer mode; for printk only */
2433 xfer_mask = ata_id_xfermask(id);
2435 if (ata_msg_probe(ap))
2438 /* SCSI only uses 4-char revisions, dump full 8 chars from ATA */
2439 ata_id_c_string(dev->id, fwrevbuf, ATA_ID_FW_REV,
2442 ata_id_c_string(dev->id, modelbuf, ATA_ID_PROD,
2445 /* ATA-specific feature tests */
2446 if (dev->class == ATA_DEV_ATA) {
2447 if (ata_id_is_cfa(id)) {
2448 /* CPRM may make this media unusable */
2449 if (id[ATA_ID_CFA_KEY_MGMT] & 1)
2450 ata_dev_printk(dev, KERN_WARNING,
2451 "supports DRM functions and may "
2452 "not be fully accessable.\n");
2453 snprintf(revbuf, 7, "CFA");
2455 snprintf(revbuf, 7, "ATA-%d", ata_id_major_version(id));
2456 /* Warn the user if the device has TPM extensions */
2457 if (ata_id_has_tpm(id))
2458 ata_dev_printk(dev, KERN_WARNING,
2459 "supports DRM functions and may "
2460 "not be fully accessable.\n");
2463 dev->n_sectors = ata_id_n_sectors(id);
2465 /* get current R/W Multiple count setting */
2466 if ((dev->id[47] >> 8) == 0x80 && (dev->id[59] & 0x100)) {
2467 unsigned int max = dev->id[47] & 0xff;
2468 unsigned int cnt = dev->id[59] & 0xff;
2469 /* only recognize/allow powers of two here */
2470 if (is_power_of_2(max) && is_power_of_2(cnt))
2472 dev->multi_count = cnt;
2475 if (ata_id_has_lba(id)) {
2476 const char *lba_desc;
2480 dev->flags |= ATA_DFLAG_LBA;
2481 if (ata_id_has_lba48(id)) {
2482 dev->flags |= ATA_DFLAG_LBA48;
2485 if (dev->n_sectors >= (1UL << 28) &&
2486 ata_id_has_flush_ext(id))
2487 dev->flags |= ATA_DFLAG_FLUSH_EXT;
2491 rc = ata_dev_config_ncq(dev, ncq_desc, sizeof(ncq_desc));
2495 /* print device info to dmesg */
2496 if (ata_msg_drv(ap) && print_info) {
2497 ata_dev_printk(dev, KERN_INFO,
2498 "%s: %s, %s, max %s\n",
2499 revbuf, modelbuf, fwrevbuf,
2500 ata_mode_string(xfer_mask));
2501 ata_dev_printk(dev, KERN_INFO,
2502 "%Lu sectors, multi %u: %s %s\n",
2503 (unsigned long long)dev->n_sectors,
2504 dev->multi_count, lba_desc, ncq_desc);
2509 /* Default translation */
2510 dev->cylinders = id[1];
2512 dev->sectors = id[6];
2514 if (ata_id_current_chs_valid(id)) {
2515 /* Current CHS translation is valid. */
2516 dev->cylinders = id[54];
2517 dev->heads = id[55];
2518 dev->sectors = id[56];
2521 /* print device info to dmesg */
2522 if (ata_msg_drv(ap) && print_info) {
2523 ata_dev_printk(dev, KERN_INFO,
2524 "%s: %s, %s, max %s\n",
2525 revbuf, modelbuf, fwrevbuf,
2526 ata_mode_string(xfer_mask));
2527 ata_dev_printk(dev, KERN_INFO,
2528 "%Lu sectors, multi %u, CHS %u/%u/%u\n",
2529 (unsigned long long)dev->n_sectors,
2530 dev->multi_count, dev->cylinders,
2531 dev->heads, dev->sectors);
2538 /* ATAPI-specific feature tests */
2539 else if (dev->class == ATA_DEV_ATAPI) {
2540 const char *cdb_intr_string = "";
2541 const char *atapi_an_string = "";
2542 const char *dma_dir_string = "";
2545 rc = atapi_cdb_len(id);
2546 if ((rc < 12) || (rc > ATAPI_CDB_LEN)) {
2547 if (ata_msg_warn(ap))
2548 ata_dev_printk(dev, KERN_WARNING,
2549 "unsupported CDB len\n");
2553 dev->cdb_len = (unsigned int) rc;
2555 /* Enable ATAPI AN if both the host and device have
2556 * the support. If PMP is attached, SNTF is required
2557 * to enable ATAPI AN to discern between PHY status
2558 * changed notifications and ATAPI ANs.
2560 if ((ap->flags & ATA_FLAG_AN) && ata_id_has_atapi_AN(id) &&
2561 (!sata_pmp_attached(ap) ||
2562 sata_scr_read(&ap->link, SCR_NOTIFICATION, &sntf) == 0)) {
2563 unsigned int err_mask;
2565 /* issue SET feature command to turn this on */
2566 err_mask = ata_dev_set_feature(dev,
2567 SETFEATURES_SATA_ENABLE, SATA_AN);
2569 ata_dev_printk(dev, KERN_ERR,
2570 "failed to enable ATAPI AN "
2571 "(err_mask=0x%x)\n", err_mask);
2573 dev->flags |= ATA_DFLAG_AN;
2574 atapi_an_string = ", ATAPI AN";
2578 if (ata_id_cdb_intr(dev->id)) {
2579 dev->flags |= ATA_DFLAG_CDB_INTR;
2580 cdb_intr_string = ", CDB intr";
2583 if (atapi_dmadir || atapi_id_dmadir(dev->id)) {
2584 dev->flags |= ATA_DFLAG_DMADIR;
2585 dma_dir_string = ", DMADIR";
2588 /* print device info to dmesg */
2589 if (ata_msg_drv(ap) && print_info)
2590 ata_dev_printk(dev, KERN_INFO,
2591 "ATAPI: %s, %s, max %s%s%s%s\n",
2593 ata_mode_string(xfer_mask),
2594 cdb_intr_string, atapi_an_string,
2598 /* determine max_sectors */
2599 dev->max_sectors = ATA_MAX_SECTORS;
2600 if (dev->flags & ATA_DFLAG_LBA48)
2601 dev->max_sectors = ATA_MAX_SECTORS_LBA48;
2603 if (!(dev->horkage & ATA_HORKAGE_IPM)) {
2604 if (ata_id_has_hipm(dev->id))
2605 dev->flags |= ATA_DFLAG_HIPM;
2606 if (ata_id_has_dipm(dev->id))
2607 dev->flags |= ATA_DFLAG_DIPM;
2610 /* Limit PATA drive on SATA cable bridge transfers to udma5,
2612 if (ata_dev_knobble(dev)) {
2613 if (ata_msg_drv(ap) && print_info)
2614 ata_dev_printk(dev, KERN_INFO,
2615 "applying bridge limits\n");
2616 dev->udma_mask &= ATA_UDMA5;
2617 dev->max_sectors = ATA_MAX_SECTORS;
2620 if ((dev->class == ATA_DEV_ATAPI) &&
2621 (atapi_command_packet_set(id) == TYPE_TAPE)) {
2622 dev->max_sectors = ATA_MAX_SECTORS_TAPE;
2623 dev->horkage |= ATA_HORKAGE_STUCK_ERR;
2626 if (dev->horkage & ATA_HORKAGE_MAX_SEC_128)
2627 dev->max_sectors = min_t(unsigned int, ATA_MAX_SECTORS_128,
2630 if (ata_dev_blacklisted(dev) & ATA_HORKAGE_IPM) {
2631 dev->horkage |= ATA_HORKAGE_IPM;
2633 /* reset link pm_policy for this port to no pm */
2634 ap->pm_policy = MAX_PERFORMANCE;
2637 if (ap->ops->dev_config)
2638 ap->ops->dev_config(dev);
2640 if (dev->horkage & ATA_HORKAGE_DIAGNOSTIC) {
2641 /* Let the user know. We don't want to disallow opens for
2642 rescue purposes, or in case the vendor is just a blithering
2643 idiot. Do this after the dev_config call as some controllers
2644 with buggy firmware may want to avoid reporting false device
2648 ata_dev_printk(dev, KERN_WARNING,
2649 "Drive reports diagnostics failure. This may indicate a drive\n");
2650 ata_dev_printk(dev, KERN_WARNING,
2651 "fault or invalid emulation. Contact drive vendor for information.\n");
2655 if ((dev->horkage & ATA_HORKAGE_FIRMWARE_WARN) && print_info) {
2656 ata_dev_printk(dev, KERN_WARNING, "WARNING: device requires "
2657 "firmware update to be fully functional.\n");
2658 ata_dev_printk(dev, KERN_WARNING, " contact the vendor "
2659 "or visit http://ata.wiki.kernel.org.\n");
2665 if (ata_msg_probe(ap))
2666 ata_dev_printk(dev, KERN_DEBUG,
2667 "%s: EXIT, err\n", __func__);
2672 * ata_cable_40wire - return 40 wire cable type
2675 * Helper method for drivers which want to hardwire 40 wire cable
2679 int ata_cable_40wire(struct ata_port *ap)
2681 return ATA_CBL_PATA40;
2685 * ata_cable_80wire - return 80 wire cable type
2688 * Helper method for drivers which want to hardwire 80 wire cable
2692 int ata_cable_80wire(struct ata_port *ap)
2694 return ATA_CBL_PATA80;
2698 * ata_cable_unknown - return unknown PATA cable.
2701 * Helper method for drivers which have no PATA cable detection.
2704 int ata_cable_unknown(struct ata_port *ap)
2706 return ATA_CBL_PATA_UNK;
2710 * ata_cable_ignore - return ignored PATA cable.
2713 * Helper method for drivers which don't use cable type to limit
2716 int ata_cable_ignore(struct ata_port *ap)
2718 return ATA_CBL_PATA_IGN;
2722 * ata_cable_sata - return SATA cable type
2725 * Helper method for drivers which have SATA cables
2728 int ata_cable_sata(struct ata_port *ap)
2730 return ATA_CBL_SATA;
2734 * ata_bus_probe - Reset and probe ATA bus
2737 * Master ATA bus probing function. Initiates a hardware-dependent
2738 * bus reset, then attempts to identify any devices found on
2742 * PCI/etc. bus probe sem.
2745 * Zero on success, negative errno otherwise.
2748 int ata_bus_probe(struct ata_port *ap)
2750 unsigned int classes[ATA_MAX_DEVICES];
2751 int tries[ATA_MAX_DEVICES];
2753 struct ata_device *dev;
2755 ata_for_each_dev(dev, &ap->link, ALL)
2756 tries[dev->devno] = ATA_PROBE_MAX_TRIES;
2759 ata_for_each_dev(dev, &ap->link, ALL) {
2760 /* If we issue an SRST then an ATA drive (not ATAPI)
2761 * may change configuration and be in PIO0 timing. If
2762 * we do a hard reset (or are coming from power on)
2763 * this is true for ATA or ATAPI. Until we've set a
2764 * suitable controller mode we should not touch the
2765 * bus as we may be talking too fast.
2767 dev->pio_mode = XFER_PIO_0;
2769 /* If the controller has a pio mode setup function
2770 * then use it to set the chipset to rights. Don't
2771 * touch the DMA setup as that will be dealt with when
2772 * configuring devices.
2774 if (ap->ops->set_piomode)
2775 ap->ops->set_piomode(ap, dev);
2778 /* reset and determine device classes */
2779 ap->ops->phy_reset(ap);
2781 ata_for_each_dev(dev, &ap->link, ALL) {
2782 if (dev->class != ATA_DEV_UNKNOWN)
2783 classes[dev->devno] = dev->class;
2785 classes[dev->devno] = ATA_DEV_NONE;
2787 dev->class = ATA_DEV_UNKNOWN;
2790 /* read IDENTIFY page and configure devices. We have to do the identify
2791 specific sequence bass-ackwards so that PDIAG- is released by
2794 ata_for_each_dev(dev, &ap->link, ALL_REVERSE) {
2795 if (tries[dev->devno])
2796 dev->class = classes[dev->devno];
2798 if (!ata_dev_enabled(dev))
2801 rc = ata_dev_read_id(dev, &dev->class, ATA_READID_POSTRESET,
2807 /* Now ask for the cable type as PDIAG- should have been released */
2808 if (ap->ops->cable_detect)
2809 ap->cbl = ap->ops->cable_detect(ap);
2811 /* We may have SATA bridge glue hiding here irrespective of
2812 * the reported cable types and sensed types. When SATA
2813 * drives indicate we have a bridge, we don't know which end
2814 * of the link the bridge is which is a problem.
2816 ata_for_each_dev(dev, &ap->link, ENABLED)
2817 if (ata_id_is_sata(dev->id))
2818 ap->cbl = ATA_CBL_SATA;
2820 /* After the identify sequence we can now set up the devices. We do
2821 this in the normal order so that the user doesn't get confused */
2823 ata_for_each_dev(dev, &ap->link, ENABLED) {
2824 ap->link.eh_context.i.flags |= ATA_EHI_PRINTINFO;
2825 rc = ata_dev_configure(dev);
2826 ap->link.eh_context.i.flags &= ~ATA_EHI_PRINTINFO;
2831 /* configure transfer mode */
2832 rc = ata_set_mode(&ap->link, &dev);
2836 ata_for_each_dev(dev, &ap->link, ENABLED)
2842 tries[dev->devno]--;
2846 /* eeek, something went very wrong, give up */
2847 tries[dev->devno] = 0;
2851 /* give it just one more chance */
2852 tries[dev->devno] = min(tries[dev->devno], 1);
2854 if (tries[dev->devno] == 1) {
2855 /* This is the last chance, better to slow
2856 * down than lose it.
2858 sata_down_spd_limit(&ap->link, 0);
2859 ata_down_xfermask_limit(dev, ATA_DNXFER_PIO);
2863 if (!tries[dev->devno])
2864 ata_dev_disable(dev);
2870 * sata_print_link_status - Print SATA link status
2871 * @link: SATA link to printk link status about
2873 * This function prints link speed and status of a SATA link.
2878 static void sata_print_link_status(struct ata_link *link)
2880 u32 sstatus, scontrol, tmp;
2882 if (sata_scr_read(link, SCR_STATUS, &sstatus))
2884 sata_scr_read(link, SCR_CONTROL, &scontrol);
2886 if (ata_phys_link_online(link)) {
2887 tmp = (sstatus >> 4) & 0xf;
2888 ata_link_printk(link, KERN_INFO,
2889 "SATA link up %s (SStatus %X SControl %X)\n",
2890 sata_spd_string(tmp), sstatus, scontrol);
2892 ata_link_printk(link, KERN_INFO,
2893 "SATA link down (SStatus %X SControl %X)\n",
2899 * ata_dev_pair - return other device on cable
2902 * Obtain the other device on the same cable, or if none is
2903 * present NULL is returned
2906 struct ata_device *ata_dev_pair(struct ata_device *adev)
2908 struct ata_link *link = adev->link;
2909 struct ata_device *pair = &link->device[1 - adev->devno];
2910 if (!ata_dev_enabled(pair))
2916 * sata_down_spd_limit - adjust SATA spd limit downward
2917 * @link: Link to adjust SATA spd limit for
2918 * @spd_limit: Additional limit
2920 * Adjust SATA spd limit of @link downward. Note that this
2921 * function only adjusts the limit. The change must be applied
2922 * using sata_set_spd().
2924 * If @spd_limit is non-zero, the speed is limited to equal to or
2925 * lower than @spd_limit if such speed is supported. If
2926 * @spd_limit is slower than any supported speed, only the lowest
2927 * supported speed is allowed.
2930 * Inherited from caller.
2933 * 0 on success, negative errno on failure
2935 int sata_down_spd_limit(struct ata_link *link, u32 spd_limit)
2937 u32 sstatus, spd, mask;
2940 if (!sata_scr_valid(link))
2943 /* If SCR can be read, use it to determine the current SPD.
2944 * If not, use cached value in link->sata_spd.
2946 rc = sata_scr_read(link, SCR_STATUS, &sstatus);
2947 if (rc == 0 && ata_sstatus_online(sstatus))
2948 spd = (sstatus >> 4) & 0xf;
2950 spd = link->sata_spd;
2952 mask = link->sata_spd_limit;
2956 /* unconditionally mask off the highest bit */
2957 bit = fls(mask) - 1;
2958 mask &= ~(1 << bit);
2960 /* Mask off all speeds higher than or equal to the current
2961 * one. Force 1.5Gbps if current SPD is not available.
2964 mask &= (1 << (spd - 1)) - 1;
2968 /* were we already at the bottom? */
2973 if (mask & ((1 << spd_limit) - 1))
2974 mask &= (1 << spd_limit) - 1;
2976 bit = ffs(mask) - 1;
2981 link->sata_spd_limit = mask;
2983 ata_link_printk(link, KERN_WARNING, "limiting SATA link speed to %s\n",
2984 sata_spd_string(fls(mask)));
2989 static int __sata_set_spd_needed(struct ata_link *link, u32 *scontrol)
2991 struct ata_link *host_link = &link->ap->link;
2992 u32 limit, target, spd;
2994 limit = link->sata_spd_limit;
2996 /* Don't configure downstream link faster than upstream link.
2997 * It doesn't speed up anything and some PMPs choke on such
3000 if (!ata_is_host_link(link) && host_link->sata_spd)
3001 limit &= (1 << host_link->sata_spd) - 1;
3003 if (limit == UINT_MAX)
3006 target = fls(limit);
3008 spd = (*scontrol >> 4) & 0xf;
3009 *scontrol = (*scontrol & ~0xf0) | ((target & 0xf) << 4);
3011 return spd != target;
3015 * sata_set_spd_needed - is SATA spd configuration needed
3016 * @link: Link in question
3018 * Test whether the spd limit in SControl matches
3019 * @link->sata_spd_limit. This function is used to determine
3020 * whether hardreset is necessary to apply SATA spd
3024 * Inherited from caller.
3027 * 1 if SATA spd configuration is needed, 0 otherwise.
3029 static int sata_set_spd_needed(struct ata_link *link)
3033 if (sata_scr_read(link, SCR_CONTROL, &scontrol))
3036 return __sata_set_spd_needed(link, &scontrol);
3040 * sata_set_spd - set SATA spd according to spd limit
3041 * @link: Link to set SATA spd for
3043 * Set SATA spd of @link according to sata_spd_limit.
3046 * Inherited from caller.
3049 * 0 if spd doesn't need to be changed, 1 if spd has been
3050 * changed. Negative errno if SCR registers are inaccessible.
3052 int sata_set_spd(struct ata_link *link)
3057 if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
3060 if (!__sata_set_spd_needed(link, &scontrol))
3063 if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol)))
3070 * This mode timing computation functionality is ported over from
3071 * drivers/ide/ide-timing.h and was originally written by Vojtech Pavlik
3074 * PIO 0-4, MWDMA 0-2 and UDMA 0-6 timings (in nanoseconds).
3075 * These were taken from ATA/ATAPI-6 standard, rev 0a, except
3076 * for UDMA6, which is currently supported only by Maxtor drives.
3078 * For PIO 5/6 MWDMA 3/4 see the CFA specification 3.0.
3081 static const struct ata_timing ata_timing[] = {
3082 /* { XFER_PIO_SLOW, 120, 290, 240, 960, 290, 240, 0, 960, 0 }, */
3083 { XFER_PIO_0, 70, 290, 240, 600, 165, 150, 0, 600, 0 },
3084 { XFER_PIO_1, 50, 290, 93, 383, 125, 100, 0, 383, 0 },
3085 { XFER_PIO_2, 30, 290, 40, 330, 100, 90, 0, 240, 0 },
3086 { XFER_PIO_3, 30, 80, 70, 180, 80, 70, 0, 180, 0 },
3087 { XFER_PIO_4, 25, 70, 25, 120, 70, 25, 0, 120, 0 },
3088 { XFER_PIO_5, 15, 65, 25, 100, 65, 25, 0, 100, 0 },
3089 { XFER_PIO_6, 10, 55, 20, 80, 55, 20, 0, 80, 0 },
3091 { XFER_SW_DMA_0, 120, 0, 0, 0, 480, 480, 50, 960, 0 },
3092 { XFER_SW_DMA_1, 90, 0, 0, 0, 240, 240, 30, 480, 0 },
3093 { XFER_SW_DMA_2, 60, 0, 0, 0, 120, 120, 20, 240, 0 },
3095 { XFER_MW_DMA_0, 60, 0, 0, 0, 215, 215, 20, 480, 0 },
3096 { XFER_MW_DMA_1, 45, 0, 0, 0, 80, 50, 5, 150, 0 },
3097 { XFER_MW_DMA_2, 25, 0, 0, 0, 70, 25, 5, 120, 0 },
3098 { XFER_MW_DMA_3, 25, 0, 0, 0, 65, 25, 5, 100, 0 },
3099 { XFER_MW_DMA_4, 25, 0, 0, 0, 55, 20, 5, 80, 0 },
3101 /* { XFER_UDMA_SLOW, 0, 0, 0, 0, 0, 0, 0, 0, 150 }, */
3102 { XFER_UDMA_0, 0, 0, 0, 0, 0, 0, 0, 0, 120 },
3103 { XFER_UDMA_1, 0, 0, 0, 0, 0, 0, 0, 0, 80 },
3104 { XFER_UDMA_2, 0, 0, 0, 0, 0, 0, 0, 0, 60 },
3105 { XFER_UDMA_3, 0, 0, 0, 0, 0, 0, 0, 0, 45 },
3106 { XFER_UDMA_4, 0, 0, 0, 0, 0, 0, 0, 0, 30 },
3107 { XFER_UDMA_5, 0, 0, 0, 0, 0, 0, 0, 0, 20 },
3108 { XFER_UDMA_6, 0, 0, 0, 0, 0, 0, 0, 0, 15 },
3113 #define ENOUGH(v, unit) (((v)-1)/(unit)+1)
3114 #define EZ(v, unit) ((v)?ENOUGH(v, unit):0)
3116 static void ata_timing_quantize(const struct ata_timing *t, struct ata_timing *q, int T, int UT)
3118 q->setup = EZ(t->setup * 1000, T);
3119 q->act8b = EZ(t->act8b * 1000, T);
3120 q->rec8b = EZ(t->rec8b * 1000, T);
3121 q->cyc8b = EZ(t->cyc8b * 1000, T);
3122 q->active = EZ(t->active * 1000, T);
3123 q->recover = EZ(t->recover * 1000, T);
3124 q->dmack_hold = EZ(t->dmack_hold * 1000, T);
3125 q->cycle = EZ(t->cycle * 1000, T);
3126 q->udma = EZ(t->udma * 1000, UT);
3129 void ata_timing_merge(const struct ata_timing *a, const struct ata_timing *b,
3130 struct ata_timing *m, unsigned int what)
3132 if (what & ATA_TIMING_SETUP ) m->setup = max(a->setup, b->setup);
3133 if (what & ATA_TIMING_ACT8B ) m->act8b = max(a->act8b, b->act8b);
3134 if (what & ATA_TIMING_REC8B ) m->rec8b = max(a->rec8b, b->rec8b);
3135 if (what & ATA_TIMING_CYC8B ) m->cyc8b = max(a->cyc8b, b->cyc8b);
3136 if (what & ATA_TIMING_ACTIVE ) m->active = max(a->active, b->active);
3137 if (what & ATA_TIMING_RECOVER) m->recover = max(a->recover, b->recover);
3138 if (what & ATA_TIMING_DMACK_HOLD) m->dmack_hold = max(a->dmack_hold, b->dmack_hold);
3139 if (what & ATA_TIMING_CYCLE ) m->cycle = max(a->cycle, b->cycle);
3140 if (what & ATA_TIMING_UDMA ) m->udma = max(a->udma, b->udma);
3143 const struct ata_timing *ata_timing_find_mode(u8 xfer_mode)
3145 const struct ata_timing *t = ata_timing;
3147 while (xfer_mode > t->mode)
3150 if (xfer_mode == t->mode)
3155 int ata_timing_compute(struct ata_device *adev, unsigned short speed,
3156 struct ata_timing *t, int T, int UT)
3158 const u16 *id = adev->id;
3159 const struct ata_timing *s;
3160 struct ata_timing p;
3166 if (!(s = ata_timing_find_mode(speed)))
3169 memcpy(t, s, sizeof(*s));
3172 * If the drive is an EIDE drive, it can tell us it needs extended
3173 * PIO/MW_DMA cycle timing.
3176 if (id[ATA_ID_FIELD_VALID] & 2) { /* EIDE drive */
3177 memset(&p, 0, sizeof(p));
3179 if (speed >= XFER_PIO_0 && speed <= XFER_SW_DMA_0) {
3180 if (speed <= XFER_PIO_2)
3181 p.cycle = p.cyc8b = id[ATA_ID_EIDE_PIO];
3182 else if ((speed <= XFER_PIO_4) ||
3183 (speed == XFER_PIO_5 && !ata_id_is_cfa(id)))
3184 p.cycle = p.cyc8b = id[ATA_ID_EIDE_PIO_IORDY];
3185 } else if (speed >= XFER_MW_DMA_0 && speed <= XFER_MW_DMA_2)
3186 p.cycle = id[ATA_ID_EIDE_DMA_MIN];
3188 ata_timing_merge(&p, t, t, ATA_TIMING_CYCLE | ATA_TIMING_CYC8B);
3192 * Convert the timing to bus clock counts.
3195 ata_timing_quantize(t, t, T, UT);
3198 * Even in DMA/UDMA modes we still use PIO access for IDENTIFY,
3199 * S.M.A.R.T * and some other commands. We have to ensure that the
3200 * DMA cycle timing is slower/equal than the fastest PIO timing.
3203 if (speed > XFER_PIO_6) {
3204 ata_timing_compute(adev, adev->pio_mode, &p, T, UT);
3205 ata_timing_merge(&p, t, t, ATA_TIMING_ALL);
3209 * Lengthen active & recovery time so that cycle time is correct.
3212 if (t->act8b + t->rec8b < t->cyc8b) {
3213 t->act8b += (t->cyc8b - (t->act8b + t->rec8b)) / 2;
3214 t->rec8b = t->cyc8b - t->act8b;
3217 if (t->active + t->recover < t->cycle) {
3218 t->active += (t->cycle - (t->active + t->recover)) / 2;
3219 t->recover = t->cycle - t->active;
3222 /* In a few cases quantisation may produce enough errors to
3223 leave t->cycle too low for the sum of active and recovery
3224 if so we must correct this */
3225 if (t->active + t->recover > t->cycle)
3226 t->cycle = t->active + t->recover;
3232 * ata_timing_cycle2mode - find xfer mode for the specified cycle duration
3233 * @xfer_shift: ATA_SHIFT_* value for transfer type to examine.
3234 * @cycle: cycle duration in ns
3236 * Return matching xfer mode for @cycle. The returned mode is of
3237 * the transfer type specified by @xfer_shift. If @cycle is too
3238 * slow for @xfer_shift, 0xff is returned. If @cycle is faster
3239 * than the fastest known mode, the fasted mode is returned.
3245 * Matching xfer_mode, 0xff if no match found.
3247 u8 ata_timing_cycle2mode(unsigned int xfer_shift, int cycle)
3249 u8 base_mode = 0xff, last_mode = 0xff;
3250 const struct ata_xfer_ent *ent;
3251 const struct ata_timing *t;
3253 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
3254 if (ent->shift == xfer_shift)
3255 base_mode = ent->base;
3257 for (t = ata_timing_find_mode(base_mode);
3258 t && ata_xfer_mode2shift(t->mode) == xfer_shift; t++) {
3259 unsigned short this_cycle;
3261 switch (xfer_shift) {
3263 case ATA_SHIFT_MWDMA:
3264 this_cycle = t->cycle;
3266 case ATA_SHIFT_UDMA:
3267 this_cycle = t->udma;
3273 if (cycle > this_cycle)
3276 last_mode = t->mode;
3283 * ata_down_xfermask_limit - adjust dev xfer masks downward
3284 * @dev: Device to adjust xfer masks
3285 * @sel: ATA_DNXFER_* selector
3287 * Adjust xfer masks of @dev downward. Note that this function
3288 * does not apply the change. Invoking ata_set_mode() afterwards
3289 * will apply the limit.
3292 * Inherited from caller.
3295 * 0 on success, negative errno on failure
3297 int ata_down_xfermask_limit(struct ata_device *dev, unsigned int sel)
3300 unsigned long orig_mask, xfer_mask;
3301 unsigned long pio_mask, mwdma_mask, udma_mask;
3304 quiet = !!(sel & ATA_DNXFER_QUIET);
3305 sel &= ~ATA_DNXFER_QUIET;
3307 xfer_mask = orig_mask = ata_pack_xfermask(dev->pio_mask,
3310 ata_unpack_xfermask(xfer_mask, &pio_mask, &mwdma_mask, &udma_mask);
3313 case ATA_DNXFER_PIO:
3314 highbit = fls(pio_mask) - 1;
3315 pio_mask &= ~(1 << highbit);
3318 case ATA_DNXFER_DMA:
3320 highbit = fls(udma_mask) - 1;
3321 udma_mask &= ~(1 << highbit);
3324 } else if (mwdma_mask) {
3325 highbit = fls(mwdma_mask) - 1;
3326 mwdma_mask &= ~(1 << highbit);
3332 case ATA_DNXFER_40C:
3333 udma_mask &= ATA_UDMA_MASK_40C;
3336 case ATA_DNXFER_FORCE_PIO0:
3338 case ATA_DNXFER_FORCE_PIO:
3347 xfer_mask &= ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask);
3349 if (!(xfer_mask & ATA_MASK_PIO) || xfer_mask == orig_mask)
3353 if (xfer_mask & (ATA_MASK_MWDMA | ATA_MASK_UDMA))
3354 snprintf(buf, sizeof(buf), "%s:%s",
3355 ata_mode_string(xfer_mask),
3356 ata_mode_string(xfer_mask & ATA_MASK_PIO));
3358 snprintf(buf, sizeof(buf), "%s",
3359 ata_mode_string(xfer_mask));
3361 ata_dev_printk(dev, KERN_WARNING,
3362 "limiting speed to %s\n", buf);
3365 ata_unpack_xfermask(xfer_mask, &dev->pio_mask, &dev->mwdma_mask,
3371 static int ata_dev_set_mode(struct ata_device *dev)
3373 struct ata_port *ap = dev->link->ap;
3374 struct ata_eh_context *ehc = &dev->link->eh_context;
3375 const bool nosetxfer = dev->horkage & ATA_HORKAGE_NOSETXFER;
3376 const char *dev_err_whine = "";
3377 int ign_dev_err = 0;
3378 unsigned int err_mask = 0;
3381 dev->flags &= ~ATA_DFLAG_PIO;
3382 if (dev->xfer_shift == ATA_SHIFT_PIO)
3383 dev->flags |= ATA_DFLAG_PIO;
3385 if (nosetxfer && ap->flags & ATA_FLAG_SATA && ata_id_is_sata(dev->id))
3386 dev_err_whine = " (SET_XFERMODE skipped)";
3389 ata_dev_printk(dev, KERN_WARNING,
3390 "NOSETXFER but PATA detected - can't "
3391 "skip SETXFER, might malfunction\n");
3392 err_mask = ata_dev_set_xfermode(dev);
3395 if (err_mask & ~AC_ERR_DEV)
3399 ehc->i.flags |= ATA_EHI_POST_SETMODE;
3400 rc = ata_dev_revalidate(dev, ATA_DEV_UNKNOWN, 0);
3401 ehc->i.flags &= ~ATA_EHI_POST_SETMODE;
3405 if (dev->xfer_shift == ATA_SHIFT_PIO) {
3406 /* Old CFA may refuse this command, which is just fine */
3407 if (ata_id_is_cfa(dev->id))
3409 /* Catch several broken garbage emulations plus some pre
3411 if (ata_id_major_version(dev->id) == 0 &&
3412 dev->pio_mode <= XFER_PIO_2)
3414 /* Some very old devices and some bad newer ones fail
3415 any kind of SET_XFERMODE request but support PIO0-2
3416 timings and no IORDY */
3417 if (!ata_id_has_iordy(dev->id) && dev->pio_mode <= XFER_PIO_2)
3420 /* Early MWDMA devices do DMA but don't allow DMA mode setting.
3421 Don't fail an MWDMA0 set IFF the device indicates it is in MWDMA0 */
3422 if (dev->xfer_shift == ATA_SHIFT_MWDMA &&
3423 dev->dma_mode == XFER_MW_DMA_0 &&
3424 (dev->id[63] >> 8) & 1)
3427 /* if the device is actually configured correctly, ignore dev err */
3428 if (dev->xfer_mode == ata_xfer_mask2mode(ata_id_xfermask(dev->id)))
3431 if (err_mask & AC_ERR_DEV) {
3435 dev_err_whine = " (device error ignored)";
3438 DPRINTK("xfer_shift=%u, xfer_mode=0x%x\n",
3439 dev->xfer_shift, (int)dev->xfer_mode);
3441 ata_dev_printk(dev, KERN_INFO, "configured for %s%s\n",
3442 ata_mode_string(ata_xfer_mode2mask(dev->xfer_mode)),
3448 ata_dev_printk(dev, KERN_ERR, "failed to set xfermode "
3449 "(err_mask=0x%x)\n", err_mask);
3454 * ata_do_set_mode - Program timings and issue SET FEATURES - XFER
3455 * @link: link on which timings will be programmed
3456 * @r_failed_dev: out parameter for failed device
3458 * Standard implementation of the function used to tune and set
3459 * ATA device disk transfer mode (PIO3, UDMA6, etc.). If
3460 * ata_dev_set_mode() fails, pointer to the failing device is
3461 * returned in @r_failed_dev.
3464 * PCI/etc. bus probe sem.
3467 * 0 on success, negative errno otherwise
3470 int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev)
3472 struct ata_port *ap = link->ap;
3473 struct ata_device *dev;
3474 int rc = 0, used_dma = 0, found = 0;
3476 /* step 1: calculate xfer_mask */
3477 ata_for_each_dev(dev, link, ENABLED) {
3478 unsigned long pio_mask, dma_mask;
3479 unsigned int mode_mask;
3481 mode_mask = ATA_DMA_MASK_ATA;
3482 if (dev->class == ATA_DEV_ATAPI)
3483 mode_mask = ATA_DMA_MASK_ATAPI;
3484 else if (ata_id_is_cfa(dev->id))
3485 mode_mask = ATA_DMA_MASK_CFA;
3487 ata_dev_xfermask(dev);
3488 ata_force_xfermask(dev);
3490 pio_mask = ata_pack_xfermask(dev->pio_mask, 0, 0);
3491 dma_mask = ata_pack_xfermask(0, dev->mwdma_mask, dev->udma_mask);
3493 if (libata_dma_mask & mode_mask)
3494 dma_mask = ata_pack_xfermask(0, dev->mwdma_mask, dev->udma_mask);
3498 dev->pio_mode = ata_xfer_mask2mode(pio_mask);
3499 dev->dma_mode = ata_xfer_mask2mode(dma_mask);
3502 if (ata_dma_enabled(dev))
3508 /* step 2: always set host PIO timings */
3509 ata_for_each_dev(dev, link, ENABLED) {
3510 if (dev->pio_mode == 0xff) {
3511 ata_dev_printk(dev, KERN_WARNING, "no PIO support\n");
3516 dev->xfer_mode = dev->pio_mode;
3517 dev->xfer_shift = ATA_SHIFT_PIO;
3518 if (ap->ops->set_piomode)
3519 ap->ops->set_piomode(ap, dev);
3522 /* step 3: set host DMA timings */
3523 ata_for_each_dev(dev, link, ENABLED) {
3524 if (!ata_dma_enabled(dev))
3527 dev->xfer_mode = dev->dma_mode;
3528 dev->xfer_shift = ata_xfer_mode2shift(dev->dma_mode);
3529 if (ap->ops->set_dmamode)
3530 ap->ops->set_dmamode(ap, dev);
3533 /* step 4: update devices' xfer mode */
3534 ata_for_each_dev(dev, link, ENABLED) {
3535 rc = ata_dev_set_mode(dev);
3540 /* Record simplex status. If we selected DMA then the other
3541 * host channels are not permitted to do so.
3543 if (used_dma && (ap->host->flags & ATA_HOST_SIMPLEX))
3544 ap->host->simplex_claimed = ap;
3548 *r_failed_dev = dev;
3553 * ata_wait_ready - wait for link to become ready
3554 * @link: link to be waited on
3555 * @deadline: deadline jiffies for the operation
3556 * @check_ready: callback to check link readiness
3558 * Wait for @link to become ready. @check_ready should return
3559 * positive number if @link is ready, 0 if it isn't, -ENODEV if
3560 * link doesn't seem to be occupied, other errno for other error
3563 * Transient -ENODEV conditions are allowed for
3564 * ATA_TMOUT_FF_WAIT.
3570 * 0 if @linke is ready before @deadline; otherwise, -errno.
3572 int ata_wait_ready(struct ata_link *link, unsigned long deadline,
3573 int (*check_ready)(struct ata_link *link))
3575 unsigned long start = jiffies;
3576 unsigned long nodev_deadline;
3579 /* choose which 0xff timeout to use, read comment in libata.h */
3580 if (link->ap->host->flags & ATA_HOST_PARALLEL_SCAN)
3581 nodev_deadline = ata_deadline(start, ATA_TMOUT_FF_WAIT_LONG);
3583 nodev_deadline = ata_deadline(start, ATA_TMOUT_FF_WAIT);
3585 /* Slave readiness can't be tested separately from master. On
3586 * M/S emulation configuration, this function should be called
3587 * only on the master and it will handle both master and slave.
3589 WARN_ON(link == link->ap->slave_link);
3591 if (time_after(nodev_deadline, deadline))
3592 nodev_deadline = deadline;
3595 unsigned long now = jiffies;
3598 ready = tmp = check_ready(link);
3603 * -ENODEV could be transient. Ignore -ENODEV if link
3604 * is online. Also, some SATA devices take a long
3605 * time to clear 0xff after reset. Wait for
3606 * ATA_TMOUT_FF_WAIT[_LONG] on -ENODEV if link isn't
3609 * Note that some PATA controllers (pata_ali) explode
3610 * if status register is read more than once when
3611 * there's no device attached.
3613 if (ready == -ENODEV) {
3614 if (ata_link_online(link))
3616 else if ((link->ap->flags & ATA_FLAG_SATA) &&
3617 !ata_link_offline(link) &&
3618 time_before(now, nodev_deadline))
3624 if (time_after(now, deadline))
3627 if (!warned && time_after(now, start + 5 * HZ) &&
3628 (deadline - now > 3 * HZ)) {
3629 ata_link_printk(link, KERN_WARNING,
3630 "link is slow to respond, please be patient "
3631 "(ready=%d)\n", tmp);
3640 * ata_wait_after_reset - wait for link to become ready after reset
3641 * @link: link to be waited on
3642 * @deadline: deadline jiffies for the operation
3643 * @check_ready: callback to check link readiness
3645 * Wait for @link to become ready after reset.
3651 * 0 if @linke is ready before @deadline; otherwise, -errno.
3653 int ata_wait_after_reset(struct ata_link *link, unsigned long deadline,
3654 int (*check_ready)(struct ata_link *link))
3656 msleep(ATA_WAIT_AFTER_RESET);
3658 return ata_wait_ready(link, deadline, check_ready);
3662 * sata_link_debounce - debounce SATA phy status
3663 * @link: ATA link to debounce SATA phy status for
3664 * @params: timing parameters { interval, duratinon, timeout } in msec
3665 * @deadline: deadline jiffies for the operation
3667 * Make sure SStatus of @link reaches stable state, determined by
3668 * holding the same value where DET is not 1 for @duration polled
3669 * every @interval, before @timeout. Timeout constraints the
3670 * beginning of the stable state. Because DET gets stuck at 1 on
3671 * some controllers after hot unplugging, this functions waits
3672 * until timeout then returns 0 if DET is stable at 1.
3674 * @timeout is further limited by @deadline. The sooner of the
3678 * Kernel thread context (may sleep)
3681 * 0 on success, -errno on failure.
3683 int sata_link_debounce(struct ata_link *link, const unsigned long *params,
3684 unsigned long deadline)
3686 unsigned long interval = params[0];
3687 unsigned long duration = params[1];
3688 unsigned long last_jiffies, t;
3692 t = ata_deadline(jiffies, params[2]);
3693 if (time_before(t, deadline))
3696 if ((rc = sata_scr_read(link, SCR_STATUS, &cur)))
3701 last_jiffies = jiffies;
3705 if ((rc = sata_scr_read(link, SCR_STATUS, &cur)))
3711 if (cur == 1 && time_before(jiffies, deadline))
3713 if (time_after(jiffies,
3714 ata_deadline(last_jiffies, duration)))
3719 /* unstable, start over */
3721 last_jiffies = jiffies;
3723 /* Check deadline. If debouncing failed, return
3724 * -EPIPE to tell upper layer to lower link speed.
3726 if (time_after(jiffies, deadline))
3732 * sata_link_resume - resume SATA link
3733 * @link: ATA link to resume SATA
3734 * @params: timing parameters { interval, duratinon, timeout } in msec
3735 * @deadline: deadline jiffies for the operation
3737 * Resume SATA phy @link and debounce it.
3740 * Kernel thread context (may sleep)
3743 * 0 on success, -errno on failure.
3745 int sata_link_resume(struct ata_link *link, const unsigned long *params,
3746 unsigned long deadline)
3748 int tries = ATA_LINK_RESUME_TRIES;
3749 u32 scontrol, serror;
3752 if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
3756 * Writes to SControl sometimes get ignored under certain
3757 * controllers (ata_piix SIDPR). Make sure DET actually is
3761 scontrol = (scontrol & 0x0f0) | 0x300;
3762 if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol)))
3765 * Some PHYs react badly if SStatus is pounded
3766 * immediately after resuming. Delay 200ms before
3771 /* is SControl restored correctly? */
3772 if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
3774 } while ((scontrol & 0xf0f) != 0x300 && --tries);
3776 if ((scontrol & 0xf0f) != 0x300) {
3777 ata_link_printk(link, KERN_ERR,
3778 "failed to resume link (SControl %X)\n",
3783 if (tries < ATA_LINK_RESUME_TRIES)
3784 ata_link_printk(link, KERN_WARNING,
3785 "link resume succeeded after %d retries\n",
3786 ATA_LINK_RESUME_TRIES - tries);
3788 if ((rc = sata_link_debounce(link, params, deadline)))
3791 /* clear SError, some PHYs require this even for SRST to work */
3792 if (!(rc = sata_scr_read(link, SCR_ERROR, &serror)))
3793 rc = sata_scr_write(link, SCR_ERROR, serror);
3795 return rc != -EINVAL ? rc : 0;
3799 * ata_std_prereset - prepare for reset
3800 * @link: ATA link to be reset
3801 * @deadline: deadline jiffies for the operation
3803 * @link is about to be reset. Initialize it. Failure from
3804 * prereset makes libata abort whole reset sequence and give up
3805 * that port, so prereset should be best-effort. It does its
3806 * best to prepare for reset sequence but if things go wrong, it
3807 * should just whine, not fail.
3810 * Kernel thread context (may sleep)
3813 * 0 on success, -errno otherwise.
3815 int ata_std_prereset(struct ata_link *link, unsigned long deadline)
3817 struct ata_port *ap = link->ap;
3818 struct ata_eh_context *ehc = &link->eh_context;
3819 const unsigned long *timing = sata_ehc_deb_timing(ehc);
3822 /* if we're about to do hardreset, nothing more to do */
3823 if (ehc->i.action & ATA_EH_HARDRESET)
3826 /* if SATA, resume link */
3827 if (ap->flags & ATA_FLAG_SATA) {
3828 rc = sata_link_resume(link, timing, deadline);
3829 /* whine about phy resume failure but proceed */
3830 if (rc && rc != -EOPNOTSUPP)
3831 ata_link_printk(link, KERN_WARNING, "failed to resume "
3832 "link for reset (errno=%d)\n", rc);
3835 /* no point in trying softreset on offline link */
3836 if (ata_phys_link_offline(link))
3837 ehc->i.action &= ~ATA_EH_SOFTRESET;
3843 * sata_link_hardreset - reset link via SATA phy reset
3844 * @link: link to reset
3845 * @timing: timing parameters { interval, duratinon, timeout } in msec
3846 * @deadline: deadline jiffies for the operation
3847 * @online: optional out parameter indicating link onlineness
3848 * @check_ready: optional callback to check link readiness
3850 * SATA phy-reset @link using DET bits of SControl register.
3851 * After hardreset, link readiness is waited upon using
3852 * ata_wait_ready() if @check_ready is specified. LLDs are
3853 * allowed to not specify @check_ready and wait itself after this
3854 * function returns. Device classification is LLD's
3857 * *@online is set to one iff reset succeeded and @link is online
3861 * Kernel thread context (may sleep)
3864 * 0 on success, -errno otherwise.
3866 int sata_link_hardreset(struct ata_link *link, const unsigned long *timing,
3867 unsigned long deadline,
3868 bool *online, int (*check_ready)(struct ata_link *))
3878 if (sata_set_spd_needed(link)) {
3879 /* SATA spec says nothing about how to reconfigure
3880 * spd. To be on the safe side, turn off phy during
3881 * reconfiguration. This works for at least ICH7 AHCI
3884 if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
3887 scontrol = (scontrol & 0x0f0) | 0x304;
3889 if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol)))
3895 /* issue phy wake/reset */
3896 if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
3899 scontrol = (scontrol & 0x0f0) | 0x301;
3901 if ((rc = sata_scr_write_flush(link, SCR_CONTROL, scontrol)))
3904 /* Couldn't find anything in SATA I/II specs, but AHCI-1.1
3905 * 10.4.2 says at least 1 ms.
3909 /* bring link back */
3910 rc = sata_link_resume(link, timing, deadline);
3913 /* if link is offline nothing more to do */
3914 if (ata_phys_link_offline(link))
3917 /* Link is online. From this point, -ENODEV too is an error. */
3921 if (sata_pmp_supported(link->ap) && ata_is_host_link(link)) {
3922 /* If PMP is supported, we have to do follow-up SRST.
3923 * Some PMPs don't send D2H Reg FIS after hardreset if
3924 * the first port is empty. Wait only for
3925 * ATA_TMOUT_PMP_SRST_WAIT.
3928 unsigned long pmp_deadline;
3930 pmp_deadline = ata_deadline(jiffies,
3931 ATA_TMOUT_PMP_SRST_WAIT);
3932 if (time_after(pmp_deadline, deadline))
3933 pmp_deadline = deadline;
3934 ata_wait_ready(link, pmp_deadline, check_ready);
3942 rc = ata_wait_ready(link, deadline, check_ready);
3944 if (rc && rc != -EAGAIN) {
3945 /* online is set iff link is online && reset succeeded */
3948 ata_link_printk(link, KERN_ERR,
3949 "COMRESET failed (errno=%d)\n", rc);
3951 DPRINTK("EXIT, rc=%d\n", rc);
3956 * sata_std_hardreset - COMRESET w/o waiting or classification
3957 * @link: link to reset
3958 * @class: resulting class of attached device
3959 * @deadline: deadline jiffies for the operation
3961 * Standard SATA COMRESET w/o waiting or classification.
3964 * Kernel thread context (may sleep)
3967 * 0 if link offline, -EAGAIN if link online, -errno on errors.
3969 int sata_std_hardreset(struct ata_link *link, unsigned int *class,
3970 unsigned long deadline)
3972 const unsigned long *timing = sata_ehc_deb_timing(&link->eh_context);
3977 rc = sata_link_hardreset(link, timing, deadline, &online, NULL);
3978 return online ? -EAGAIN : rc;
3982 * ata_std_postreset - standard postreset callback
3983 * @link: the target ata_link
3984 * @classes: classes of attached devices
3986 * This function is invoked after a successful reset. Note that
3987 * the device might have been reset more than once using
3988 * different reset methods before postreset is invoked.
3991 * Kernel thread context (may sleep)
3993 void ata_std_postreset(struct ata_link *link, unsigned int *classes)
3999 /* reset complete, clear SError */
4000 if (!sata_scr_read(link, SCR_ERROR, &serror))
4001 sata_scr_write(link, SCR_ERROR, serror);
4003 /* print link status */
4004 sata_print_link_status(link);
4010 * ata_dev_same_device - Determine whether new ID matches configured device
4011 * @dev: device to compare against
4012 * @new_class: class of the new device
4013 * @new_id: IDENTIFY page of the new device
4015 * Compare @new_class and @new_id against @dev and determine
4016 * whether @dev is the device indicated by @new_class and
4023 * 1 if @dev matches @new_class and @new_id, 0 otherwise.
4025 static int ata_dev_same_device(struct ata_device *dev, unsigned int new_class,
4028 const u16 *old_id = dev->id;
4029 unsigned char model[2][ATA_ID_PROD_LEN + 1];
4030 unsigned char serial[2][ATA_ID_SERNO_LEN + 1];
4032 if (dev->class != new_class) {
4033 ata_dev_printk(dev, KERN_INFO, "class mismatch %d != %d\n",
4034 dev->class, new_class);
4038 ata_id_c_string(old_id, model[0], ATA_ID_PROD, sizeof(model[0]));
4039 ata_id_c_string(new_id, model[1], ATA_ID_PROD, sizeof(model[1]));
4040 ata_id_c_string(old_id, serial[0], ATA_ID_SERNO, sizeof(serial[0]));
4041 ata_id_c_string(new_id, serial[1], ATA_ID_SERNO, sizeof(serial[1]));
4043 if (strcmp(model[0], model[1])) {
4044 ata_dev_printk(dev, KERN_INFO, "model number mismatch "
4045 "'%s' != '%s'\n", model[0], model[1]);
4049 if (strcmp(serial[0], serial[1])) {
4050 ata_dev_printk(dev, KERN_INFO, "serial number mismatch "
4051 "'%s' != '%s'\n", serial[0], serial[1]);
4059 * ata_dev_reread_id - Re-read IDENTIFY data
4060 * @dev: target ATA device
4061 * @readid_flags: read ID flags
4063 * Re-read IDENTIFY page and make sure @dev is still attached to
4067 * Kernel thread context (may sleep)
4070 * 0 on success, negative errno otherwise
4072 int ata_dev_reread_id(struct ata_device *dev, unsigned int readid_flags)
4074 unsigned int class = dev->class;
4075 u16 *id = (void *)dev->link->ap->sector_buf;
4079 rc = ata_dev_read_id(dev, &class, readid_flags, id);
4083 /* is the device still there? */
4084 if (!ata_dev_same_device(dev, class, id))
4087 memcpy(dev->id, id, sizeof(id[0]) * ATA_ID_WORDS);
4092 * ata_dev_revalidate - Revalidate ATA device
4093 * @dev: device to revalidate
4094 * @new_class: new class code
4095 * @readid_flags: read ID flags
4097 * Re-read IDENTIFY page, make sure @dev is still attached to the
4098 * port and reconfigure it according to the new IDENTIFY page.
4101 * Kernel thread context (may sleep)
4104 * 0 on success, negative errno otherwise
4106 int ata_dev_revalidate(struct ata_device *dev, unsigned int new_class,
4107 unsigned int readid_flags)
4109 u64 n_sectors = dev->n_sectors;
4110 u64 n_native_sectors = dev->n_native_sectors;
4113 if (!ata_dev_enabled(dev))
4116 /* fail early if !ATA && !ATAPI to avoid issuing [P]IDENTIFY to PMP */
4117 if (ata_class_enabled(new_class) &&
4118 new_class != ATA_DEV_ATA &&
4119 new_class != ATA_DEV_ATAPI &&
4120 new_class != ATA_DEV_SEMB) {
4121 ata_dev_printk(dev, KERN_INFO, "class mismatch %u != %u\n",
4122 dev->class, new_class);
4128 rc = ata_dev_reread_id(dev, readid_flags);
4132 /* configure device according to the new ID */
4133 rc = ata_dev_configure(dev);
4137 /* verify n_sectors hasn't changed */
4138 if (dev->class != ATA_DEV_ATA || !n_sectors ||
4139 dev->n_sectors == n_sectors)
4142 /* n_sectors has changed */
4143 ata_dev_printk(dev, KERN_WARNING, "n_sectors mismatch %llu != %llu\n",
4144 (unsigned long long)n_sectors,
4145 (unsigned long long)dev->n_sectors);
4148 * Something could have caused HPA to be unlocked
4149 * involuntarily. If n_native_sectors hasn't changed and the
4150 * new size matches it, keep the device.
4152 if (dev->n_native_sectors == n_native_sectors &&
4153 dev->n_sectors > n_sectors && dev->n_sectors == n_native_sectors) {
4154 ata_dev_printk(dev, KERN_WARNING,
4155 "new n_sectors matches native, probably "
4156 "late HPA unlock, continuing\n");
4157 /* keep using the old n_sectors */
4158 dev->n_sectors = n_sectors;
4163 * Some BIOSes boot w/o HPA but resume w/ HPA locked. Try
4164 * unlocking HPA in those cases.
4166 * https://bugzilla.kernel.org/show_bug.cgi?id=15396
4168 if (dev->n_native_sectors == n_native_sectors &&
4169 dev->n_sectors < n_sectors && n_sectors == n_native_sectors &&
4170 !(dev->horkage & ATA_HORKAGE_BROKEN_HPA)) {
4171 ata_dev_printk(dev, KERN_WARNING,
4172 "old n_sectors matches native, probably "
4173 "late HPA lock, will try to unlock HPA\n");
4174 /* try unlocking HPA */
4175 dev->flags |= ATA_DFLAG_UNLOCK_HPA;
4180 /* restore original n_[native_]sectors and fail */
4181 dev->n_native_sectors = n_native_sectors;
4182 dev->n_sectors = n_sectors;
4184 ata_dev_printk(dev, KERN_ERR, "revalidation failed (errno=%d)\n", rc);
4188 struct ata_blacklist_entry {
4189 const char *model_num;
4190 const char *model_rev;
4191 unsigned long horkage;
4194 static const struct ata_blacklist_entry ata_device_blacklist [] = {
4195 /* Devices with DMA related problems under Linux */
4196 { "WDC AC11000H", NULL, ATA_HORKAGE_NODMA },
4197 { "WDC AC22100H", NULL, ATA_HORKAGE_NODMA },
4198 { "WDC AC32500H", NULL, ATA_HORKAGE_NODMA },
4199 { "WDC AC33100H", NULL, ATA_HORKAGE_NODMA },
4200 { "WDC AC31600H", NULL, ATA_HORKAGE_NODMA },
4201 { "WDC AC32100H", "24.09P07", ATA_HORKAGE_NODMA },
4202 { "WDC AC23200L", "21.10N21", ATA_HORKAGE_NODMA },
4203 { "Compaq CRD-8241B", NULL, ATA_HORKAGE_NODMA },
4204 { "CRD-8400B", NULL, ATA_HORKAGE_NODMA },
4205 { "CRD-8480B", NULL, ATA_HORKAGE_NODMA },
4206 { "CRD-8482B", NULL, ATA_HORKAGE_NODMA },
4207 { "CRD-84", NULL, ATA_HORKAGE_NODMA },
4208 { "SanDisk SDP3B", NULL, ATA_HORKAGE_NODMA },
4209 { "SanDisk SDP3B-64", NULL, ATA_HORKAGE_NODMA },
4210 { "SANYO CD-ROM CRD", NULL, ATA_HORKAGE_NODMA },
4211 { "HITACHI CDR-8", NULL, ATA_HORKAGE_NODMA },
4212 { "HITACHI CDR-8335", NULL, ATA_HORKAGE_NODMA },
4213 { "HITACHI CDR-8435", NULL, ATA_HORKAGE_NODMA },
4214 { "Toshiba CD-ROM XM-6202B", NULL, ATA_HORKAGE_NODMA },
4215 { "TOSHIBA CD-ROM XM-1702BC", NULL, ATA_HORKAGE_NODMA },
4216 { "CD-532E-A", NULL, ATA_HORKAGE_NODMA },
4217 { "E-IDE CD-ROM CR-840",NULL, ATA_HORKAGE_NODMA },
4218 { "CD-ROM Drive/F5A", NULL, ATA_HORKAGE_NODMA },
4219 { "WPI CDD-820", NULL, ATA_HORKAGE_NODMA },
4220 { "SAMSUNG CD-ROM SC-148C", NULL, ATA_HORKAGE_NODMA },
4221 { "SAMSUNG CD-ROM SC", NULL, ATA_HORKAGE_NODMA },
4222 { "ATAPI CD-ROM DRIVE 40X MAXIMUM",NULL,ATA_HORKAGE_NODMA },
4223 { "_NEC DV5800A", NULL, ATA_HORKAGE_NODMA },
4224 { "SAMSUNG CD-ROM SN-124", "N001", ATA_HORKAGE_NODMA },
4225 { "Seagate STT20000A", NULL, ATA_HORKAGE_NODMA },
4226 /* Odd clown on sil3726/4726 PMPs */
4227 { "Config Disk", NULL, ATA_HORKAGE_DISABLE },
4229 /* Weird ATAPI devices */
4230 { "TORiSAN DVD-ROM DRD-N216", NULL, ATA_HORKAGE_MAX_SEC_128 },
4231 { "QUANTUM DAT DAT72-000", NULL, ATA_HORKAGE_ATAPI_MOD16_DMA },
4233 /* Devices we expect to fail diagnostics */
4235 /* Devices where NCQ should be avoided */
4237 { "WDC WD740ADFD-00", NULL, ATA_HORKAGE_NONCQ },
4238 { "WDC WD740ADFD-00NLR1", NULL, ATA_HORKAGE_NONCQ, },
4239 /* http://thread.gmane.org/gmane.linux.ide/14907 */
4240 { "FUJITSU MHT2060BH", NULL, ATA_HORKAGE_NONCQ },
4242 { "Maxtor *", "BANC*", ATA_HORKAGE_NONCQ },
4243 { "Maxtor 7V300F0", "VA111630", ATA_HORKAGE_NONCQ },
4244 { "ST380817AS", "3.42", ATA_HORKAGE_NONCQ },
4245 { "ST3160023AS", "3.42", ATA_HORKAGE_NONCQ },
4246 { "OCZ CORE_SSD", "02.10104", ATA_HORKAGE_NONCQ },
4248 /* Seagate NCQ + FLUSH CACHE firmware bug */
4249 { "ST31500341AS", "SD15", ATA_HORKAGE_NONCQ |
4250 ATA_HORKAGE_FIRMWARE_WARN },
4251 { "ST31500341AS", "SD16", ATA_HORKAGE_NONCQ |
4252 ATA_HORKAGE_FIRMWARE_WARN },
4253 { "ST31500341AS", "SD17", ATA_HORKAGE_NONCQ |
4254 ATA_HORKAGE_FIRMWARE_WARN },
4255 { "ST31500341AS", "SD18", ATA_HORKAGE_NONCQ |
4256 ATA_HORKAGE_FIRMWARE_WARN },
4257 { "ST31500341AS", "SD19", ATA_HORKAGE_NONCQ |
4258 ATA_HORKAGE_FIRMWARE_WARN },
4260 { "ST31000333AS", "SD15", ATA_HORKAGE_NONCQ |
4261 ATA_HORKAGE_FIRMWARE_WARN },
4262 { "ST31000333AS", "SD16", ATA_HORKAGE_NONCQ |
4263 ATA_HORKAGE_FIRMWARE_WARN },
4264 { "ST31000333AS", "SD17", ATA_HORKAGE_NONCQ |
4265 ATA_HORKAGE_FIRMWARE_WARN },
4266 { "ST31000333AS", "SD18", ATA_HORKAGE_NONCQ |
4267 ATA_HORKAGE_FIRMWARE_WARN },
4268 { "ST31000333AS", "SD19", ATA_HORKAGE_NONCQ |
4269 ATA_HORKAGE_FIRMWARE_WARN },
4271 { "ST3640623AS", "SD15", ATA_HORKAGE_NONCQ |
4272 ATA_HORKAGE_FIRMWARE_WARN },
4273 { "ST3640623AS", "SD16", ATA_HORKAGE_NONCQ |
4274 ATA_HORKAGE_FIRMWARE_WARN },
4275 { "ST3640623AS", "SD17", ATA_HORKAGE_NONCQ |
4276 ATA_HORKAGE_FIRMWARE_WARN },
4277 { "ST3640623AS", "SD18", ATA_HORKAGE_NONCQ |
4278 ATA_HORKAGE_FIRMWARE_WARN },
4279 { "ST3640623AS", "SD19", ATA_HORKAGE_NONCQ |
4280 ATA_HORKAGE_FIRMWARE_WARN },
4282 { "ST3640323AS", "SD15", ATA_HORKAGE_NONCQ |
4283 ATA_HORKAGE_FIRMWARE_WARN },
4284 { "ST3640323AS", "SD16", ATA_HORKAGE_NONCQ |
4285 ATA_HORKAGE_FIRMWARE_WARN },
4286 { "ST3640323AS", "SD17", ATA_HORKAGE_NONCQ |
4287 ATA_HORKAGE_FIRMWARE_WARN },
4288 { "ST3640323AS", "SD18", ATA_HORKAGE_NONCQ |
4289 ATA_HORKAGE_FIRMWARE_WARN },
4290 { "ST3640323AS", "SD19", ATA_HORKAGE_NONCQ |
4291 ATA_HORKAGE_FIRMWARE_WARN },
4293 { "ST3320813AS", "SD15", ATA_HORKAGE_NONCQ |
4294 ATA_HORKAGE_FIRMWARE_WARN },
4295 { "ST3320813AS", "SD16", ATA_HORKAGE_NONCQ |
4296 ATA_HORKAGE_FIRMWARE_WARN },
4297 { "ST3320813AS", "SD17", ATA_HORKAGE_NONCQ |
4298 ATA_HORKAGE_FIRMWARE_WARN },
4299 { "ST3320813AS", "SD18", ATA_HORKAGE_NONCQ |
4300 ATA_HORKAGE_FIRMWARE_WARN },
4301 { "ST3320813AS", "SD19", ATA_HORKAGE_NONCQ |
4302 ATA_HORKAGE_FIRMWARE_WARN },
4304 { "ST3320613AS", "SD15", ATA_HORKAGE_NONCQ |
4305 ATA_HORKAGE_FIRMWARE_WARN },
4306 { "ST3320613AS", "SD16", ATA_HORKAGE_NONCQ |
4307 ATA_HORKAGE_FIRMWARE_WARN },
4308 { "ST3320613AS", "SD17", ATA_HORKAGE_NONCQ |
4309 ATA_HORKAGE_FIRMWARE_WARN },
4310 { "ST3320613AS", "SD18", ATA_HORKAGE_NONCQ |
4311 ATA_HORKAGE_FIRMWARE_WARN },
4312 { "ST3320613AS", "SD19", ATA_HORKAGE_NONCQ |
4313 ATA_HORKAGE_FIRMWARE_WARN },
4315 /* Blacklist entries taken from Silicon Image 3124/3132
4316 Windows driver .inf file - also several Linux problem reports */
4317 { "HTS541060G9SA00", "MB3OC60D", ATA_HORKAGE_NONCQ, },
4318 { "HTS541080G9SA00", "MB4OC60D", ATA_HORKAGE_NONCQ, },
4319 { "HTS541010G9SA00", "MBZOC60D", ATA_HORKAGE_NONCQ, },
4321 /* https://bugzilla.kernel.org/show_bug.cgi?id=15573 */
4322 { "C300-CTFDDAC128MAG", "0001", ATA_HORKAGE_NONCQ, },
4324 /* devices which puke on READ_NATIVE_MAX */
4325 { "HDS724040KLSA80", "KFAOA20N", ATA_HORKAGE_BROKEN_HPA, },
4326 { "WDC WD3200JD-00KLB0", "WD-WCAMR1130137", ATA_HORKAGE_BROKEN_HPA },
4327 { "WDC WD2500JD-00HBB0", "WD-WMAL71490727", ATA_HORKAGE_BROKEN_HPA },
4328 { "MAXTOR 6L080L4", "A93.0500", ATA_HORKAGE_BROKEN_HPA },
4330 /* this one allows HPA unlocking but fails IOs on the area */
4331 { "OCZ-VERTEX", "1.30", ATA_HORKAGE_BROKEN_HPA },
4333 /* Devices which report 1 sector over size HPA */
4334 { "ST340823A", NULL, ATA_HORKAGE_HPA_SIZE, },
4335 { "ST320413A", NULL, ATA_HORKAGE_HPA_SIZE, },
4336 { "ST310211A", NULL, ATA_HORKAGE_HPA_SIZE, },
4338 /* Devices which get the IVB wrong */
4339 { "QUANTUM FIREBALLlct10 05", "A03.0900", ATA_HORKAGE_IVB, },
4340 /* Maybe we should just blacklist TSSTcorp... */
4341 { "TSSTcorp CDDVDW SH-S202H", "SB00", ATA_HORKAGE_IVB, },
4342 { "TSSTcorp CDDVDW SH-S202H", "SB01", ATA_HORKAGE_IVB, },
4343 { "TSSTcorp CDDVDW SH-S202J", "SB00", ATA_HORKAGE_IVB, },
4344 { "TSSTcorp CDDVDW SH-S202J", "SB01", ATA_HORKAGE_IVB, },
4345 { "TSSTcorp CDDVDW SH-S202N", "SB00", ATA_HORKAGE_IVB, },
4346 { "TSSTcorp CDDVDW SH-S202N", "SB01", ATA_HORKAGE_IVB, },
4348 /* Devices that do not need bridging limits applied */
4349 { "MTRON MSP-SATA*", NULL, ATA_HORKAGE_BRIDGE_OK, },
4351 /* Devices which aren't very happy with higher link speeds */
4352 { "WD My Book", NULL, ATA_HORKAGE_1_5_GBPS, },
4355 * Devices which choke on SETXFER. Applies only if both the
4356 * device and controller are SATA.
4358 { "PIONEER DVD-RW DVRTD08", "1.00", ATA_HORKAGE_NOSETXFER },
4364 static int strn_pattern_cmp(const char *patt, const char *name, int wildchar)
4370 * check for trailing wildcard: *\0
4372 p = strchr(patt, wildchar);
4373 if (p && ((*(p + 1)) == 0))
4384 return strncmp(patt, name, len);
4387 static unsigned long ata_dev_blacklisted(const struct ata_device *dev)
4389 unsigned char model_num[ATA_ID_PROD_LEN + 1];
4390 unsigned char model_rev[ATA_ID_FW_REV_LEN + 1];
4391 const struct ata_blacklist_entry *ad = ata_device_blacklist;
4393 ata_id_c_string(dev->id, model_num, ATA_ID_PROD, sizeof(model_num));
4394 ata_id_c_string(dev->id, model_rev, ATA_ID_FW_REV, sizeof(model_rev));
4396 while (ad->model_num) {
4397 if (!strn_pattern_cmp(ad->model_num, model_num, '*')) {
4398 if (ad->model_rev == NULL)
4400 if (!strn_pattern_cmp(ad->model_rev, model_rev, '*'))
4408 static int ata_dma_blacklisted(const struct ata_device *dev)
4410 /* We don't support polling DMA.
4411 * DMA blacklist those ATAPI devices with CDB-intr (and use PIO)
4412 * if the LLDD handles only interrupts in the HSM_ST_LAST state.
4414 if ((dev->link->ap->flags & ATA_FLAG_PIO_POLLING) &&
4415 (dev->flags & ATA_DFLAG_CDB_INTR))
4417 return (dev->horkage & ATA_HORKAGE_NODMA) ? 1 : 0;
4421 * ata_is_40wire - check drive side detection
4424 * Perform drive side detection decoding, allowing for device vendors
4425 * who can't follow the documentation.
4428 static int ata_is_40wire(struct ata_device *dev)
4430 if (dev->horkage & ATA_HORKAGE_IVB)
4431 return ata_drive_40wire_relaxed(dev->id);
4432 return ata_drive_40wire(dev->id);
4436 * cable_is_40wire - 40/80/SATA decider
4437 * @ap: port to consider
4439 * This function encapsulates the policy for speed management
4440 * in one place. At the moment we don't cache the result but
4441 * there is a good case for setting ap->cbl to the result when
4442 * we are called with unknown cables (and figuring out if it
4443 * impacts hotplug at all).
4445 * Return 1 if the cable appears to be 40 wire.
4448 static int cable_is_40wire(struct ata_port *ap)
4450 struct ata_link *link;
4451 struct ata_device *dev;
4453 /* If the controller thinks we are 40 wire, we are. */
4454 if (ap->cbl == ATA_CBL_PATA40)
4457 /* If the controller thinks we are 80 wire, we are. */
4458 if (ap->cbl == ATA_CBL_PATA80 || ap->cbl == ATA_CBL_SATA)
4461 /* If the system is known to be 40 wire short cable (eg
4462 * laptop), then we allow 80 wire modes even if the drive
4465 if (ap->cbl == ATA_CBL_PATA40_SHORT)
4468 /* If the controller doesn't know, we scan.
4470 * Note: We look for all 40 wire detects at this point. Any
4471 * 80 wire detect is taken to be 80 wire cable because
4472 * - in many setups only the one drive (slave if present) will
4473 * give a valid detect
4474 * - if you have a non detect capable drive you don't want it
4475 * to colour the choice
4477 ata_for_each_link(link, ap, EDGE) {
4478 ata_for_each_dev(dev, link, ENABLED) {
4479 if (!ata_is_40wire(dev))
4487 * ata_dev_xfermask - Compute supported xfermask of the given device
4488 * @dev: Device to compute xfermask for
4490 * Compute supported xfermask of @dev and store it in
4491 * dev->*_mask. This function is responsible for applying all
4492 * known limits including host controller limits, device
4498 static void ata_dev_xfermask(struct ata_device *dev)
4500 struct ata_link *link = dev->link;
4501 struct ata_port *ap = link->ap;
4502 struct ata_host *host = ap->host;
4503 unsigned long xfer_mask;
4505 /* controller modes available */
4506 xfer_mask = ata_pack_xfermask(ap->pio_mask,
4507 ap->mwdma_mask, ap->udma_mask);
4509 /* drive modes available */
4510 xfer_mask &= ata_pack_xfermask(dev->pio_mask,
4511 dev->mwdma_mask, dev->udma_mask);
4512 xfer_mask &= ata_id_xfermask(dev->id);
4515 * CFA Advanced TrueIDE timings are not allowed on a shared
4518 if (ata_dev_pair(dev)) {
4519 /* No PIO5 or PIO6 */
4520 xfer_mask &= ~(0x03 << (ATA_SHIFT_PIO + 5));
4521 /* No MWDMA3 or MWDMA 4 */
4522 xfer_mask &= ~(0x03 << (ATA_SHIFT_MWDMA + 3));
4525 if (ata_dma_blacklisted(dev)) {
4526 xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA);
4527 ata_dev_printk(dev, KERN_WARNING,
4528 "device is on DMA blacklist, disabling DMA\n");
4531 if ((host->flags & ATA_HOST_SIMPLEX) &&
4532 host->simplex_claimed && host->simplex_claimed != ap) {
4533 xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA);
4534 ata_dev_printk(dev, KERN_WARNING, "simplex DMA is claimed by "
4535 "other device, disabling DMA\n");
4538 if (ap->flags & ATA_FLAG_NO_IORDY)
4539 xfer_mask &= ata_pio_mask_no_iordy(dev);
4541 if (ap->ops->mode_filter)
4542 xfer_mask = ap->ops->mode_filter(dev, xfer_mask);
4544 /* Apply cable rule here. Don't apply it early because when
4545 * we handle hot plug the cable type can itself change.
4546 * Check this last so that we know if the transfer rate was
4547 * solely limited by the cable.
4548 * Unknown or 80 wire cables reported host side are checked
4549 * drive side as well. Cases where we know a 40wire cable
4550 * is used safely for 80 are not checked here.
4552 if (xfer_mask & (0xF8 << ATA_SHIFT_UDMA))
4553 /* UDMA/44 or higher would be available */
4554 if (cable_is_40wire(ap)) {
4555 ata_dev_printk(dev, KERN_WARNING,
4556 "limited to UDMA/33 due to 40-wire cable\n");
4557 xfer_mask &= ~(0xF8 << ATA_SHIFT_UDMA);
4560 ata_unpack_xfermask(xfer_mask, &dev->pio_mask,
4561 &dev->mwdma_mask, &dev->udma_mask);
4565 * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command
4566 * @dev: Device to which command will be sent
4568 * Issue SET FEATURES - XFER MODE command to device @dev
4572 * PCI/etc. bus probe sem.
4575 * 0 on success, AC_ERR_* mask otherwise.
4578 static unsigned int ata_dev_set_xfermode(struct ata_device *dev)
4580 struct ata_taskfile tf;
4581 unsigned int err_mask;
4583 /* set up set-features taskfile */
4584 DPRINTK("set features - xfer mode\n");
4586 /* Some controllers and ATAPI devices show flaky interrupt
4587 * behavior after setting xfer mode. Use polling instead.
4589 ata_tf_init(dev, &tf);
4590 tf.command = ATA_CMD_SET_FEATURES;
4591 tf.feature = SETFEATURES_XFER;
4592 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_POLLING;
4593 tf.protocol = ATA_PROT_NODATA;
4594 /* If we are using IORDY we must send the mode setting command */
4595 if (ata_pio_need_iordy(dev))
4596 tf.nsect = dev->xfer_mode;
4597 /* If the device has IORDY and the controller does not - turn it off */
4598 else if (ata_id_has_iordy(dev->id))
4600 else /* In the ancient relic department - skip all of this */
4603 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
4605 DPRINTK("EXIT, err_mask=%x\n", err_mask);
4609 * ata_dev_set_feature - Issue SET FEATURES - SATA FEATURES
4610 * @dev: Device to which command will be sent
4611 * @enable: Whether to enable or disable the feature
4612 * @feature: The sector count represents the feature to set
4614 * Issue SET FEATURES - SATA FEATURES command to device @dev
4615 * on port @ap with sector count
4618 * PCI/etc. bus probe sem.
4621 * 0 on success, AC_ERR_* mask otherwise.
4623 static unsigned int ata_dev_set_feature(struct ata_device *dev, u8 enable,
4626 struct ata_taskfile tf;
4627 unsigned int err_mask;
4629 /* set up set-features taskfile */
4630 DPRINTK("set features - SATA features\n");
4632 ata_tf_init(dev, &tf);
4633 tf.command = ATA_CMD_SET_FEATURES;
4634 tf.feature = enable;
4635 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
4636 tf.protocol = ATA_PROT_NODATA;
4639 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
4641 DPRINTK("EXIT, err_mask=%x\n", err_mask);
4646 * ata_dev_init_params - Issue INIT DEV PARAMS command
4647 * @dev: Device to which command will be sent
4648 * @heads: Number of heads (taskfile parameter)
4649 * @sectors: Number of sectors (taskfile parameter)
4652 * Kernel thread context (may sleep)
4655 * 0 on success, AC_ERR_* mask otherwise.
4657 static unsigned int ata_dev_init_params(struct ata_device *dev,
4658 u16 heads, u16 sectors)
4660 struct ata_taskfile tf;
4661 unsigned int err_mask;
4663 /* Number of sectors per track 1-255. Number of heads 1-16 */
4664 if (sectors < 1 || sectors > 255 || heads < 1 || heads > 16)
4665 return AC_ERR_INVALID;
4667 /* set up init dev params taskfile */
4668 DPRINTK("init dev params \n");
4670 ata_tf_init(dev, &tf);
4671 tf.command = ATA_CMD_INIT_DEV_PARAMS;
4672 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
4673 tf.protocol = ATA_PROT_NODATA;
4675 tf.device |= (heads - 1) & 0x0f; /* max head = num. of heads - 1 */
4677 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
4678 /* A clean abort indicates an original or just out of spec drive
4679 and we should continue as we issue the setup based on the
4680 drive reported working geometry */
4681 if (err_mask == AC_ERR_DEV && (tf.feature & ATA_ABORTED))
4684 DPRINTK("EXIT, err_mask=%x\n", err_mask);
4689 * ata_sg_clean - Unmap DMA memory associated with command
4690 * @qc: Command containing DMA memory to be released
4692 * Unmap all mapped DMA memory associated with this command.
4695 * spin_lock_irqsave(host lock)
4697 void ata_sg_clean(struct ata_queued_cmd *qc)
4699 struct ata_port *ap = qc->ap;
4700 struct scatterlist *sg = qc->sg;
4701 int dir = qc->dma_dir;
4703 WARN_ON_ONCE(sg == NULL);
4705 VPRINTK("unmapping %u sg elements\n", qc->n_elem);
4708 dma_unmap_sg(ap->dev, sg, qc->orig_n_elem, dir);
4710 qc->flags &= ~ATA_QCFLAG_DMAMAP;
4715 * atapi_check_dma - Check whether ATAPI DMA can be supported
4716 * @qc: Metadata associated with taskfile to check
4718 * Allow low-level driver to filter ATA PACKET commands, returning
4719 * a status indicating whether or not it is OK to use DMA for the
4720 * supplied PACKET command.
4723 * spin_lock_irqsave(host lock)
4725 * RETURNS: 0 when ATAPI DMA can be used
4728 int atapi_check_dma(struct ata_queued_cmd *qc)
4730 struct ata_port *ap = qc->ap;
4732 /* Don't allow DMA if it isn't multiple of 16 bytes. Quite a
4733 * few ATAPI devices choke on such DMA requests.
4735 if (!(qc->dev->horkage & ATA_HORKAGE_ATAPI_MOD16_DMA) &&
4736 unlikely(qc->nbytes & 15))
4739 if (ap->ops->check_atapi_dma)
4740 return ap->ops->check_atapi_dma(qc);
4746 * ata_std_qc_defer - Check whether a qc needs to be deferred
4747 * @qc: ATA command in question
4749 * Non-NCQ commands cannot run with any other command, NCQ or
4750 * not. As upper layer only knows the queue depth, we are
4751 * responsible for maintaining exclusion. This function checks
4752 * whether a new command @qc can be issued.
4755 * spin_lock_irqsave(host lock)
4758 * ATA_DEFER_* if deferring is needed, 0 otherwise.
4760 int ata_std_qc_defer(struct ata_queued_cmd *qc)
4762 struct ata_link *link = qc->dev->link;
4764 if (qc->tf.protocol == ATA_PROT_NCQ) {
4765 if (!ata_tag_valid(link->active_tag))
4768 if (!ata_tag_valid(link->active_tag) && !link->sactive)
4772 return ATA_DEFER_LINK;
4775 void ata_noop_qc_prep(struct ata_queued_cmd *qc) { }
4778 * ata_sg_init - Associate command with scatter-gather table.
4779 * @qc: Command to be associated
4780 * @sg: Scatter-gather table.
4781 * @n_elem: Number of elements in s/g table.
4783 * Initialize the data-related elements of queued_cmd @qc
4784 * to point to a scatter-gather table @sg, containing @n_elem
4788 * spin_lock_irqsave(host lock)
4790 void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
4791 unsigned int n_elem)
4794 qc->n_elem = n_elem;
4799 * ata_sg_setup - DMA-map the scatter-gather table associated with a command.
4800 * @qc: Command with scatter-gather table to be mapped.
4802 * DMA-map the scatter-gather table associated with queued_cmd @qc.
4805 * spin_lock_irqsave(host lock)
4808 * Zero on success, negative on error.
4811 static int ata_sg_setup(struct ata_queued_cmd *qc)
4813 struct ata_port *ap = qc->ap;
4814 unsigned int n_elem;
4816 VPRINTK("ENTER, ata%u\n", ap->print_id);
4818 n_elem = dma_map_sg(ap->dev, qc->sg, qc->n_elem, qc->dma_dir);
4822 DPRINTK("%d sg elements mapped\n", n_elem);
4823 qc->orig_n_elem = qc->n_elem;
4824 qc->n_elem = n_elem;
4825 qc->flags |= ATA_QCFLAG_DMAMAP;
4831 * swap_buf_le16 - swap halves of 16-bit words in place
4832 * @buf: Buffer to swap
4833 * @buf_words: Number of 16-bit words in buffer.
4835 * Swap halves of 16-bit words if needed to convert from
4836 * little-endian byte order to native cpu byte order, or
4840 * Inherited from caller.
4842 void swap_buf_le16(u16 *buf, unsigned int buf_words)
4847 for (i = 0; i < buf_words; i++)
4848 buf[i] = le16_to_cpu(buf[i]);
4849 #endif /* __BIG_ENDIAN */
4853 * ata_qc_new - Request an available ATA command, for queueing
4860 static struct ata_queued_cmd *ata_qc_new(struct ata_port *ap)
4862 struct ata_queued_cmd *qc = NULL;
4865 /* no command while frozen */
4866 if (unlikely(ap->pflags & ATA_PFLAG_FROZEN))
4869 /* the last tag is reserved for internal command. */
4870 for (i = 0; i < ATA_MAX_QUEUE - 1; i++)
4871 if (!test_and_set_bit(i, &ap->qc_allocated)) {
4872 qc = __ata_qc_from_tag(ap, i);
4883 * ata_qc_new_init - Request an available ATA command, and initialize it
4884 * @dev: Device from whom we request an available command structure
4890 struct ata_queued_cmd *ata_qc_new_init(struct ata_device *dev)
4892 struct ata_port *ap = dev->link->ap;
4893 struct ata_queued_cmd *qc;
4895 qc = ata_qc_new(ap);
4908 * ata_qc_free - free unused ata_queued_cmd
4909 * @qc: Command to complete
4911 * Designed to free unused ata_queued_cmd object
4912 * in case something prevents using it.
4915 * spin_lock_irqsave(host lock)
4917 void ata_qc_free(struct ata_queued_cmd *qc)
4919 struct ata_port *ap;
4922 WARN_ON_ONCE(qc == NULL); /* ata_qc_from_tag _might_ return NULL */
4927 if (likely(ata_tag_valid(tag))) {
4928 qc->tag = ATA_TAG_POISON;
4929 clear_bit(tag, &ap->qc_allocated);
4933 void __ata_qc_complete(struct ata_queued_cmd *qc)
4935 struct ata_port *ap;
4936 struct ata_link *link;
4938 WARN_ON_ONCE(qc == NULL); /* ata_qc_from_tag _might_ return NULL */
4939 WARN_ON_ONCE(!(qc->flags & ATA_QCFLAG_ACTIVE));
4941 link = qc->dev->link;
4943 if (likely(qc->flags & ATA_QCFLAG_DMAMAP))
4946 /* command should be marked inactive atomically with qc completion */
4947 if (qc->tf.protocol == ATA_PROT_NCQ) {
4948 link->sactive &= ~(1 << qc->tag);
4950 ap->nr_active_links--;
4952 link->active_tag = ATA_TAG_POISON;
4953 ap->nr_active_links--;
4956 /* clear exclusive status */
4957 if (unlikely(qc->flags & ATA_QCFLAG_CLEAR_EXCL &&
4958 ap->excl_link == link))
4959 ap->excl_link = NULL;
4961 /* atapi: mark qc as inactive to prevent the interrupt handler
4962 * from completing the command twice later, before the error handler
4963 * is called. (when rc != 0 and atapi request sense is needed)
4965 qc->flags &= ~ATA_QCFLAG_ACTIVE;
4966 ap->qc_active &= ~(1 << qc->tag);
4968 /* call completion callback */
4969 qc->complete_fn(qc);
4972 static void fill_result_tf(struct ata_queued_cmd *qc)
4974 struct ata_port *ap = qc->ap;
4976 qc->result_tf.flags = qc->tf.flags;
4977 ap->ops->qc_fill_rtf(qc);
4980 static void ata_verify_xfer(struct ata_queued_cmd *qc)
4982 struct ata_device *dev = qc->dev;
4984 if (ata_tag_internal(qc->tag))
4987 if (ata_is_nodata(qc->tf.protocol))
4990 if ((dev->mwdma_mask || dev->udma_mask) && ata_is_pio(qc->tf.protocol))
4993 dev->flags &= ~ATA_DFLAG_DUBIOUS_XFER;
4997 * ata_qc_complete - Complete an active ATA command
4998 * @qc: Command to complete
5000 * Indicate to the mid and upper layers that an ATA
5001 * command has completed, with either an ok or not-ok status.
5004 * spin_lock_irqsave(host lock)
5006 void ata_qc_complete(struct ata_queued_cmd *qc)
5008 struct ata_port *ap = qc->ap;
5010 /* XXX: New EH and old EH use different mechanisms to
5011 * synchronize EH with regular execution path.
5013 * In new EH, a failed qc is marked with ATA_QCFLAG_FAILED.
5014 * Normal execution path is responsible for not accessing a
5015 * failed qc. libata core enforces the rule by returning NULL
5016 * from ata_qc_from_tag() for failed qcs.
5018 * Old EH depends on ata_qc_complete() nullifying completion
5019 * requests if ATA_QCFLAG_EH_SCHEDULED is set. Old EH does
5020 * not synchronize with interrupt handler. Only PIO task is
5023 if (ap->ops->error_handler) {
5024 struct ata_device *dev = qc->dev;
5025 struct ata_eh_info *ehi = &dev->link->eh_info;
5027 if (unlikely(qc->err_mask))
5028 qc->flags |= ATA_QCFLAG_FAILED;
5030 if (unlikely(qc->flags & ATA_QCFLAG_FAILED)) {
5031 /* always fill result TF for failed qc */
5034 if (!ata_tag_internal(qc->tag))
5035 ata_qc_schedule_eh(qc);
5037 __ata_qc_complete(qc);
5041 WARN_ON_ONCE(ap->pflags & ATA_PFLAG_FROZEN);
5043 /* read result TF if requested */
5044 if (qc->flags & ATA_QCFLAG_RESULT_TF)
5047 /* Some commands need post-processing after successful
5050 switch (qc->tf.command) {
5051 case ATA_CMD_SET_FEATURES:
5052 if (qc->tf.feature != SETFEATURES_WC_ON &&
5053 qc->tf.feature != SETFEATURES_WC_OFF)
5056 case ATA_CMD_INIT_DEV_PARAMS: /* CHS translation changed */
5057 case ATA_CMD_SET_MULTI: /* multi_count changed */
5058 /* revalidate device */
5059 ehi->dev_action[dev->devno] |= ATA_EH_REVALIDATE;
5060 ata_port_schedule_eh(ap);
5064 dev->flags |= ATA_DFLAG_SLEEPING;
5068 if (unlikely(dev->flags & ATA_DFLAG_DUBIOUS_XFER))
5069 ata_verify_xfer(qc);
5071 __ata_qc_complete(qc);
5073 if (qc->flags & ATA_QCFLAG_EH_SCHEDULED)
5076 /* read result TF if failed or requested */
5077 if (qc->err_mask || qc->flags & ATA_QCFLAG_RESULT_TF)
5080 __ata_qc_complete(qc);
5085 * ata_qc_complete_multiple - Complete multiple qcs successfully
5086 * @ap: port in question
5087 * @qc_active: new qc_active mask
5089 * Complete in-flight commands. This functions is meant to be
5090 * called from low-level driver's interrupt routine to complete
5091 * requests normally. ap->qc_active and @qc_active is compared
5092 * and commands are completed accordingly.
5095 * spin_lock_irqsave(host lock)
5098 * Number of completed commands on success, -errno otherwise.
5100 int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active)
5105 done_mask = ap->qc_active ^ qc_active;
5107 if (unlikely(done_mask & qc_active)) {
5108 ata_port_printk(ap, KERN_ERR, "illegal qc_active transition "
5109 "(%08x->%08x)\n", ap->qc_active, qc_active);
5114 struct ata_queued_cmd *qc;
5115 unsigned int tag = __ffs(done_mask);
5117 qc = ata_qc_from_tag(ap, tag);
5119 ata_qc_complete(qc);
5122 done_mask &= ~(1 << tag);
5129 * ata_qc_issue - issue taskfile to device
5130 * @qc: command to issue to device
5132 * Prepare an ATA command to submission to device.
5133 * This includes mapping the data into a DMA-able
5134 * area, filling in the S/G table, and finally
5135 * writing the taskfile to hardware, starting the command.
5138 * spin_lock_irqsave(host lock)
5140 void ata_qc_issue(struct ata_queued_cmd *qc)
5142 struct ata_port *ap = qc->ap;
5143 struct ata_link *link = qc->dev->link;
5144 u8 prot = qc->tf.protocol;
5146 /* Make sure only one non-NCQ command is outstanding. The
5147 * check is skipped for old EH because it reuses active qc to
5148 * request ATAPI sense.
5150 WARN_ON_ONCE(ap->ops->error_handler && ata_tag_valid(link->active_tag));
5152 if (ata_is_ncq(prot)) {
5153 WARN_ON_ONCE(link->sactive & (1 << qc->tag));
5156 ap->nr_active_links++;
5157 link->sactive |= 1 << qc->tag;
5159 WARN_ON_ONCE(link->sactive);
5161 ap->nr_active_links++;
5162 link->active_tag = qc->tag;
5165 qc->flags |= ATA_QCFLAG_ACTIVE;
5166 ap->qc_active |= 1 << qc->tag;
5168 /* We guarantee to LLDs that they will have at least one
5169 * non-zero sg if the command is a data command.
5171 BUG_ON(ata_is_data(prot) && (!qc->sg || !qc->n_elem || !qc->nbytes));
5173 if (ata_is_dma(prot) || (ata_is_pio(prot) &&
5174 (ap->flags & ATA_FLAG_PIO_DMA)))
5175 if (ata_sg_setup(qc))
5178 /* if device is sleeping, schedule reset and abort the link */
5179 if (unlikely(qc->dev->flags & ATA_DFLAG_SLEEPING)) {
5180 link->eh_info.action |= ATA_EH_RESET;
5181 ata_ehi_push_desc(&link->eh_info, "waking up from sleep");
5182 ata_link_abort(link);
5186 ap->ops->qc_prep(qc);
5188 qc->err_mask |= ap->ops->qc_issue(qc);
5189 if (unlikely(qc->err_mask))
5194 qc->err_mask |= AC_ERR_SYSTEM;
5196 ata_qc_complete(qc);
5200 * sata_scr_valid - test whether SCRs are accessible
5201 * @link: ATA link to test SCR accessibility for
5203 * Test whether SCRs are accessible for @link.
5209 * 1 if SCRs are accessible, 0 otherwise.
5211 int sata_scr_valid(struct ata_link *link)
5213 struct ata_port *ap = link->ap;
5215 return (ap->flags & ATA_FLAG_SATA) && ap->ops->scr_read;
5219 * sata_scr_read - read SCR register of the specified port
5220 * @link: ATA link to read SCR for
5222 * @val: Place to store read value
5224 * Read SCR register @reg of @link into *@val. This function is
5225 * guaranteed to succeed if @link is ap->link, the cable type of
5226 * the port is SATA and the port implements ->scr_read.
5229 * None if @link is ap->link. Kernel thread context otherwise.
5232 * 0 on success, negative errno on failure.
5234 int sata_scr_read(struct ata_link *link, int reg, u32 *val)
5236 if (ata_is_host_link(link)) {
5237 if (sata_scr_valid(link))
5238 return link->ap->ops->scr_read(link, reg, val);
5242 return sata_pmp_scr_read(link, reg, val);
5246 * sata_scr_write - write SCR register of the specified port
5247 * @link: ATA link to write SCR for
5248 * @reg: SCR to write
5249 * @val: value to write
5251 * Write @val to SCR register @reg of @link. This function is
5252 * guaranteed to succeed if @link is ap->link, the cable type of
5253 * the port is SATA and the port implements ->scr_read.
5256 * None if @link is ap->link. Kernel thread context otherwise.
5259 * 0 on success, negative errno on failure.
5261 int sata_scr_write(struct ata_link *link, int reg, u32 val)
5263 if (ata_is_host_link(link)) {
5264 if (sata_scr_valid(link))
5265 return link->ap->ops->scr_write(link, reg, val);
5269 return sata_pmp_scr_write(link, reg, val);
5273 * sata_scr_write_flush - write SCR register of the specified port and flush
5274 * @link: ATA link to write SCR for
5275 * @reg: SCR to write
5276 * @val: value to write
5278 * This function is identical to sata_scr_write() except that this
5279 * function performs flush after writing to the register.
5282 * None if @link is ap->link. Kernel thread context otherwise.
5285 * 0 on success, negative errno on failure.
5287 int sata_scr_write_flush(struct ata_link *link, int reg, u32 val)
5289 if (ata_is_host_link(link)) {
5292 if (sata_scr_valid(link)) {
5293 rc = link->ap->ops->scr_write(link, reg, val);
5295 rc = link->ap->ops->scr_read(link, reg, &val);
5301 return sata_pmp_scr_write(link, reg, val);
5305 * ata_phys_link_online - test whether the given link is online
5306 * @link: ATA link to test
5308 * Test whether @link is online. Note that this function returns
5309 * 0 if online status of @link cannot be obtained, so
5310 * ata_link_online(link) != !ata_link_offline(link).
5316 * True if the port online status is available and online.
5318 bool ata_phys_link_online(struct ata_link *link)
5322 if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0 &&
5323 ata_sstatus_online(sstatus))
5329 * ata_phys_link_offline - test whether the given link is offline
5330 * @link: ATA link to test
5332 * Test whether @link is offline. Note that this function
5333 * returns 0 if offline status of @link cannot be obtained, so
5334 * ata_link_online(link) != !ata_link_offline(link).
5340 * True if the port offline status is available and offline.
5342 bool ata_phys_link_offline(struct ata_link *link)
5346 if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0 &&
5347 !ata_sstatus_online(sstatus))
5353 * ata_link_online - test whether the given link is online
5354 * @link: ATA link to test
5356 * Test whether @link is online. This is identical to
5357 * ata_phys_link_online() when there's no slave link. When
5358 * there's a slave link, this function should only be called on
5359 * the master link and will return true if any of M/S links is
5366 * True if the port online status is available and online.
5368 bool ata_link_online(struct ata_link *link)
5370 struct ata_link *slave = link->ap->slave_link;
5372 WARN_ON(link == slave); /* shouldn't be called on slave link */
5374 return ata_phys_link_online(link) ||
5375 (slave && ata_phys_link_online(slave));
5379 * ata_link_offline - test whether the given link is offline
5380 * @link: ATA link to test
5382 * Test whether @link is offline. This is identical to
5383 * ata_phys_link_offline() when there's no slave link. When
5384 * there's a slave link, this function should only be called on
5385 * the master link and will return true if both M/S links are
5392 * True if the port offline status is available and offline.
5394 bool ata_link_offline(struct ata_link *link)
5396 struct ata_link *slave = link->ap->slave_link;
5398 WARN_ON(link == slave); /* shouldn't be called on slave link */
5400 return ata_phys_link_offline(link) &&
5401 (!slave || ata_phys_link_offline(slave));
5405 static int ata_host_request_pm(struct ata_host *host, pm_message_t mesg,
5406 unsigned int action, unsigned int ehi_flags,
5409 unsigned long flags;
5412 for (i = 0; i < host->n_ports; i++) {
5413 struct ata_port *ap = host->ports[i];
5414 struct ata_link *link;
5416 /* Previous resume operation might still be in
5417 * progress. Wait for PM_PENDING to clear.
5419 if (ap->pflags & ATA_PFLAG_PM_PENDING) {
5420 ata_port_wait_eh(ap);
5421 WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING);
5424 /* request PM ops to EH */
5425 spin_lock_irqsave(ap->lock, flags);
5430 ap->pm_result = &rc;
5433 ap->pflags |= ATA_PFLAG_PM_PENDING;
5434 ata_for_each_link(link, ap, HOST_FIRST) {
5435 link->eh_info.action |= action;
5436 link->eh_info.flags |= ehi_flags;
5439 ata_port_schedule_eh(ap);
5441 spin_unlock_irqrestore(ap->lock, flags);
5443 /* wait and check result */
5445 ata_port_wait_eh(ap);
5446 WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING);
5456 * ata_host_suspend - suspend host
5457 * @host: host to suspend
5460 * Suspend @host. Actual operation is performed by EH. This
5461 * function requests EH to perform PM operations and waits for EH
5465 * Kernel thread context (may sleep).
5468 * 0 on success, -errno on failure.
5470 int ata_host_suspend(struct ata_host *host, pm_message_t mesg)
5475 * disable link pm on all ports before requesting
5478 ata_lpm_enable(host);
5480 rc = ata_host_request_pm(host, mesg, 0, ATA_EHI_QUIET, 1);
5482 host->dev->power.power_state = mesg;
5487 * ata_host_resume - resume host
5488 * @host: host to resume
5490 * Resume @host. Actual operation is performed by EH. This
5491 * function requests EH to perform PM operations and returns.
5492 * Note that all resume operations are performed parallely.
5495 * Kernel thread context (may sleep).
5497 void ata_host_resume(struct ata_host *host)
5499 ata_host_request_pm(host, PMSG_ON, ATA_EH_RESET,
5500 ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET, 0);
5501 host->dev->power.power_state = PMSG_ON;
5503 /* reenable link pm */
5504 ata_lpm_disable(host);
5509 * ata_dev_init - Initialize an ata_device structure
5510 * @dev: Device structure to initialize
5512 * Initialize @dev in preparation for probing.
5515 * Inherited from caller.
5517 void ata_dev_init(struct ata_device *dev)
5519 struct ata_link *link = ata_dev_phys_link(dev);
5520 struct ata_port *ap = link->ap;
5521 unsigned long flags;
5523 /* SATA spd limit is bound to the attached device, reset together */
5524 link->sata_spd_limit = link->hw_sata_spd_limit;
5527 /* High bits of dev->flags are used to record warm plug
5528 * requests which occur asynchronously. Synchronize using
5531 spin_lock_irqsave(ap->lock, flags);
5532 dev->flags &= ~ATA_DFLAG_INIT_MASK;
5534 spin_unlock_irqrestore(ap->lock, flags);
5536 memset((void *)dev + ATA_DEVICE_CLEAR_BEGIN, 0,
5537 ATA_DEVICE_CLEAR_END - ATA_DEVICE_CLEAR_BEGIN);
5538 dev->pio_mask = UINT_MAX;
5539 dev->mwdma_mask = UINT_MAX;
5540 dev->udma_mask = UINT_MAX;
5544 * ata_link_init - Initialize an ata_link structure
5545 * @ap: ATA port link is attached to
5546 * @link: Link structure to initialize
5547 * @pmp: Port multiplier port number
5552 * Kernel thread context (may sleep)
5554 void ata_link_init(struct ata_port *ap, struct ata_link *link, int pmp)
5558 /* clear everything except for devices */
5559 memset(link, 0, offsetof(struct ata_link, device[0]));
5563 link->active_tag = ATA_TAG_POISON;
5564 link->hw_sata_spd_limit = UINT_MAX;
5566 /* can't use iterator, ap isn't initialized yet */
5567 for (i = 0; i < ATA_MAX_DEVICES; i++) {
5568 struct ata_device *dev = &link->device[i];
5571 dev->devno = dev - link->device;
5572 #ifdef CONFIG_ATA_ACPI
5573 dev->gtf_filter = ata_acpi_gtf_filter;
5580 * sata_link_init_spd - Initialize link->sata_spd_limit
5581 * @link: Link to configure sata_spd_limit for
5583 * Initialize @link->[hw_]sata_spd_limit to the currently
5587 * Kernel thread context (may sleep).
5590 * 0 on success, -errno on failure.
5592 int sata_link_init_spd(struct ata_link *link)
5597 rc = sata_scr_read(link, SCR_CONTROL, &link->saved_scontrol);
5601 spd = (link->saved_scontrol >> 4) & 0xf;
5603 link->hw_sata_spd_limit &= (1 << spd) - 1;
5605 ata_force_link_limits(link);
5607 link->sata_spd_limit = link->hw_sata_spd_limit;
5613 * ata_port_alloc - allocate and initialize basic ATA port resources
5614 * @host: ATA host this allocated port belongs to
5616 * Allocate and initialize basic ATA port resources.
5619 * Allocate ATA port on success, NULL on failure.
5622 * Inherited from calling layer (may sleep).
5624 struct ata_port *ata_port_alloc(struct ata_host *host)
5626 struct ata_port *ap;
5630 ap = kzalloc(sizeof(*ap), GFP_KERNEL);
5634 ap->pflags |= ATA_PFLAG_INITIALIZING;
5635 ap->lock = &host->lock;
5638 ap->dev = host->dev;
5640 #if defined(ATA_VERBOSE_DEBUG)
5641 /* turn on all debugging levels */
5642 ap->msg_enable = 0x00FF;
5643 #elif defined(ATA_DEBUG)
5644 ap->msg_enable = ATA_MSG_DRV | ATA_MSG_INFO | ATA_MSG_CTL | ATA_MSG_WARN | ATA_MSG_ERR;
5646 ap->msg_enable = ATA_MSG_DRV | ATA_MSG_ERR | ATA_MSG_WARN;
5649 #ifdef CONFIG_ATA_SFF
5650 INIT_DELAYED_WORK(&ap->port_task, ata_pio_task);
5652 INIT_DELAYED_WORK(&ap->port_task, NULL);
5654 INIT_DELAYED_WORK(&ap->hotplug_task, ata_scsi_hotplug);
5655 INIT_WORK(&ap->scsi_rescan_task, ata_scsi_dev_rescan);
5656 INIT_LIST_HEAD(&ap->eh_done_q);
5657 init_waitqueue_head(&ap->eh_wait_q);
5658 init_completion(&ap->park_req_pending);
5659 init_timer_deferrable(&ap->fastdrain_timer);
5660 ap->fastdrain_timer.function = ata_eh_fastdrain_timerfn;
5661 ap->fastdrain_timer.data = (unsigned long)ap;
5663 ap->cbl = ATA_CBL_NONE;
5665 ata_link_init(ap, &ap->link, 0);
5668 ap->stats.unhandled_irq = 1;
5669 ap->stats.idle_irq = 1;
5671 ata_sff_port_init(ap);
5676 static void ata_host_release(struct device *gendev, void *res)
5678 struct ata_host *host = dev_get_drvdata(gendev);
5681 for (i = 0; i < host->n_ports; i++) {
5682 struct ata_port *ap = host->ports[i];
5688 scsi_host_put(ap->scsi_host);
5690 kfree(ap->pmp_link);
5691 kfree(ap->slave_link);
5693 host->ports[i] = NULL;
5696 dev_set_drvdata(gendev, NULL);
5700 * ata_host_alloc - allocate and init basic ATA host resources
5701 * @dev: generic device this host is associated with
5702 * @max_ports: maximum number of ATA ports associated with this host
5704 * Allocate and initialize basic ATA host resources. LLD calls
5705 * this function to allocate a host, initializes it fully and
5706 * attaches it using ata_host_register().
5708 * @max_ports ports are allocated and host->n_ports is
5709 * initialized to @max_ports. The caller is allowed to decrease
5710 * host->n_ports before calling ata_host_register(). The unused
5711 * ports will be automatically freed on registration.
5714 * Allocate ATA host on success, NULL on failure.
5717 * Inherited from calling layer (may sleep).
5719 struct ata_host *ata_host_alloc(struct device *dev, int max_ports)
5721 struct ata_host *host;
5727 if (!devres_open_group(dev, NULL, GFP_KERNEL))
5730 /* alloc a container for our list of ATA ports (buses) */
5731 sz = sizeof(struct ata_host) + (max_ports + 1) * sizeof(void *);
5732 /* alloc a container for our list of ATA ports (buses) */
5733 host = devres_alloc(ata_host_release, sz, GFP_KERNEL);
5737 devres_add(dev, host);
5738 dev_set_drvdata(dev, host);
5740 spin_lock_init(&host->lock);
5742 host->n_ports = max_ports;
5744 /* allocate ports bound to this host */
5745 for (i = 0; i < max_ports; i++) {
5746 struct ata_port *ap;
5748 ap = ata_port_alloc(host);
5753 host->ports[i] = ap;
5756 devres_remove_group(dev, NULL);
5760 devres_release_group(dev, NULL);
5765 * ata_host_alloc_pinfo - alloc host and init with port_info array
5766 * @dev: generic device this host is associated with
5767 * @ppi: array of ATA port_info to initialize host with
5768 * @n_ports: number of ATA ports attached to this host
5770 * Allocate ATA host and initialize with info from @ppi. If NULL
5771 * terminated, @ppi may contain fewer entries than @n_ports. The
5772 * last entry will be used for the remaining ports.
5775 * Allocate ATA host on success, NULL on failure.
5778 * Inherited from calling layer (may sleep).
5780 struct ata_host *ata_host_alloc_pinfo(struct device *dev,
5781 const struct ata_port_info * const * ppi,
5784 const struct ata_port_info *pi;
5785 struct ata_host *host;
5788 host = ata_host_alloc(dev, n_ports);
5792 for (i = 0, j = 0, pi = NULL; i < host->n_ports; i++) {
5793 struct ata_port *ap = host->ports[i];
5798 ap->pio_mask = pi->pio_mask;
5799 ap->mwdma_mask = pi->mwdma_mask;
5800 ap->udma_mask = pi->udma_mask;
5801 ap->flags |= pi->flags;
5802 ap->link.flags |= pi->link_flags;
5803 ap->ops = pi->port_ops;
5805 if (!host->ops && (pi->port_ops != &ata_dummy_port_ops))
5806 host->ops = pi->port_ops;
5813 * ata_slave_link_init - initialize slave link
5814 * @ap: port to initialize slave link for
5816 * Create and initialize slave link for @ap. This enables slave
5817 * link handling on the port.
5819 * In libata, a port contains links and a link contains devices.
5820 * There is single host link but if a PMP is attached to it,
5821 * there can be multiple fan-out links. On SATA, there's usually
5822 * a single device connected to a link but PATA and SATA
5823 * controllers emulating TF based interface can have two - master
5826 * However, there are a few controllers which don't fit into this
5827 * abstraction too well - SATA controllers which emulate TF
5828 * interface with both master and slave devices but also have
5829 * separate SCR register sets for each device. These controllers
5830 * need separate links for physical link handling
5831 * (e.g. onlineness, link speed) but should be treated like a
5832 * traditional M/S controller for everything else (e.g. command
5833 * issue, softreset).
5835 * slave_link is libata's way of handling this class of
5836 * controllers without impacting core layer too much. For
5837 * anything other than physical link handling, the default host
5838 * link is used for both master and slave. For physical link
5839 * handling, separate @ap->slave_link is used. All dirty details
5840 * are implemented inside libata core layer. From LLD's POV, the
5841 * only difference is that prereset, hardreset and postreset are
5842 * called once more for the slave link, so the reset sequence
5843 * looks like the following.
5845 * prereset(M) -> prereset(S) -> hardreset(M) -> hardreset(S) ->
5846 * softreset(M) -> postreset(M) -> postreset(S)
5848 * Note that softreset is called only for the master. Softreset
5849 * resets both M/S by definition, so SRST on master should handle
5850 * both (the standard method will work just fine).
5853 * Should be called before host is registered.
5856 * 0 on success, -errno on failure.
5858 int ata_slave_link_init(struct ata_port *ap)
5860 struct ata_link *link;
5862 WARN_ON(ap->slave_link);
5863 WARN_ON(ap->flags & ATA_FLAG_PMP);
5865 link = kzalloc(sizeof(*link), GFP_KERNEL);
5869 ata_link_init(ap, link, 1);
5870 ap->slave_link = link;
5874 static void ata_host_stop(struct device *gendev, void *res)
5876 struct ata_host *host = dev_get_drvdata(gendev);
5879 WARN_ON(!(host->flags & ATA_HOST_STARTED));
5881 for (i = 0; i < host->n_ports; i++) {
5882 struct ata_port *ap = host->ports[i];
5884 if (ap->ops->port_stop)
5885 ap->ops->port_stop(ap);
5888 if (host->ops->host_stop)
5889 host->ops->host_stop(host);
5893 * ata_finalize_port_ops - finalize ata_port_operations
5894 * @ops: ata_port_operations to finalize
5896 * An ata_port_operations can inherit from another ops and that
5897 * ops can again inherit from another. This can go on as many
5898 * times as necessary as long as there is no loop in the
5899 * inheritance chain.
5901 * Ops tables are finalized when the host is started. NULL or
5902 * unspecified entries are inherited from the closet ancestor
5903 * which has the method and the entry is populated with it.
5904 * After finalization, the ops table directly points to all the
5905 * methods and ->inherits is no longer necessary and cleared.
5907 * Using ATA_OP_NULL, inheriting ops can force a method to NULL.
5912 static void ata_finalize_port_ops(struct ata_port_operations *ops)
5914 static DEFINE_SPINLOCK(lock);
5915 const struct ata_port_operations *cur;
5916 void **begin = (void **)ops;
5917 void **end = (void **)&ops->inherits;
5920 if (!ops || !ops->inherits)
5925 for (cur = ops->inherits; cur; cur = cur->inherits) {
5926 void **inherit = (void **)cur;
5928 for (pp = begin; pp < end; pp++, inherit++)
5933 for (pp = begin; pp < end; pp++)
5937 ops->inherits = NULL;
5943 * ata_host_start - start and freeze ports of an ATA host
5944 * @host: ATA host to start ports for
5946 * Start and then freeze ports of @host. Started status is
5947 * recorded in host->flags, so this function can be called
5948 * multiple times. Ports are guaranteed to get started only
5949 * once. If host->ops isn't initialized yet, its set to the
5950 * first non-dummy port ops.
5953 * Inherited from calling layer (may sleep).
5956 * 0 if all ports are started successfully, -errno otherwise.
5958 int ata_host_start(struct ata_host *host)
5961 void *start_dr = NULL;
5964 if (host->flags & ATA_HOST_STARTED)
5967 ata_finalize_port_ops(host->ops);
5969 for (i = 0; i < host->n_ports; i++) {
5970 struct ata_port *ap = host->ports[i];
5972 ata_finalize_port_ops(ap->ops);
5974 if (!host->ops && !ata_port_is_dummy(ap))
5975 host->ops = ap->ops;
5977 if (ap->ops->port_stop)
5981 if (host->ops->host_stop)
5985 start_dr = devres_alloc(ata_host_stop, 0, GFP_KERNEL);
5990 for (i = 0; i < host->n_ports; i++) {
5991 struct ata_port *ap = host->ports[i];
5993 if (ap->ops->port_start) {
5994 rc = ap->ops->port_start(ap);
5997 dev_printk(KERN_ERR, host->dev,
5998 "failed to start port %d "
5999 "(errno=%d)\n", i, rc);
6003 ata_eh_freeze_port(ap);
6007 devres_add(host->dev, start_dr);
6008 host->flags |= ATA_HOST_STARTED;
6013 struct ata_port *ap = host->ports[i];
6015 if (ap->ops->port_stop)
6016 ap->ops->port_stop(ap);
6018 devres_free(start_dr);
6023 * ata_sas_host_init - Initialize a host struct
6024 * @host: host to initialize
6025 * @dev: device host is attached to
6026 * @flags: host flags
6030 * PCI/etc. bus probe sem.
6033 /* KILLME - the only user left is ipr */
6034 void ata_host_init(struct ata_host *host, struct device *dev,
6035 unsigned long flags, struct ata_port_operations *ops)
6037 spin_lock_init(&host->lock);
6039 host->flags = flags;
6044 static void async_port_probe(void *data, async_cookie_t cookie)
6047 struct ata_port *ap = data;
6050 * If we're not allowed to scan this host in parallel,
6051 * we need to wait until all previous scans have completed
6052 * before going further.
6053 * Jeff Garzik says this is only within a controller, so we
6054 * don't need to wait for port 0, only for later ports.
6056 if (!(ap->host->flags & ATA_HOST_PARALLEL_SCAN) && ap->port_no != 0)
6057 async_synchronize_cookie(cookie);
6060 if (ap->ops->error_handler) {
6061 struct ata_eh_info *ehi = &ap->link.eh_info;
6062 unsigned long flags;
6064 /* kick EH for boot probing */
6065 spin_lock_irqsave(ap->lock, flags);
6067 ehi->probe_mask |= ATA_ALL_DEVICES;
6068 ehi->action |= ATA_EH_RESET | ATA_EH_LPM;
6069 ehi->flags |= ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET;
6071 ap->pflags &= ~ATA_PFLAG_INITIALIZING;
6072 ap->pflags |= ATA_PFLAG_LOADING;
6073 ata_port_schedule_eh(ap);
6075 spin_unlock_irqrestore(ap->lock, flags);
6077 /* wait for EH to finish */
6078 ata_port_wait_eh(ap);
6080 DPRINTK("ata%u: bus probe begin\n", ap->print_id);
6081 rc = ata_bus_probe(ap);
6082 DPRINTK("ata%u: bus probe end\n", ap->print_id);
6085 /* FIXME: do something useful here?
6086 * Current libata behavior will
6087 * tear down everything when
6088 * the module is removed
6089 * or the h/w is unplugged.
6094 /* in order to keep device order, we need to synchronize at this point */
6095 async_synchronize_cookie(cookie);
6097 ata_scsi_scan_host(ap, 1);
6101 * ata_host_register - register initialized ATA host
6102 * @host: ATA host to register
6103 * @sht: template for SCSI host
6105 * Register initialized ATA host. @host is allocated using
6106 * ata_host_alloc() and fully initialized by LLD. This function
6107 * starts ports, registers @host with ATA and SCSI layers and
6108 * probe registered devices.
6111 * Inherited from calling layer (may sleep).
6114 * 0 on success, -errno otherwise.
6116 int ata_host_register(struct ata_host *host, struct scsi_host_template *sht)
6120 /* host must have been started */
6121 if (!(host->flags & ATA_HOST_STARTED)) {
6122 dev_printk(KERN_ERR, host->dev,
6123 "BUG: trying to register unstarted host\n");
6128 /* Blow away unused ports. This happens when LLD can't
6129 * determine the exact number of ports to allocate at
6132 for (i = host->n_ports; host->ports[i]; i++)
6133 kfree(host->ports[i]);
6135 /* give ports names and add SCSI hosts */
6136 for (i = 0; i < host->n_ports; i++)
6137 host->ports[i]->print_id = ata_print_id++;
6139 rc = ata_scsi_add_hosts(host, sht);
6143 /* associate with ACPI nodes */
6144 ata_acpi_associate(host);
6146 /* set cable, sata_spd_limit and report */
6147 for (i = 0; i < host->n_ports; i++) {
6148 struct ata_port *ap = host->ports[i];
6149 unsigned long xfer_mask;
6151 /* set SATA cable type if still unset */
6152 if (ap->cbl == ATA_CBL_NONE && (ap->flags & ATA_FLAG_SATA))
6153 ap->cbl = ATA_CBL_SATA;
6155 /* init sata_spd_limit to the current value */
6156 sata_link_init_spd(&ap->link);
6158 sata_link_init_spd(ap->slave_link);
6160 /* print per-port info to dmesg */
6161 xfer_mask = ata_pack_xfermask(ap->pio_mask, ap->mwdma_mask,
6164 if (!ata_port_is_dummy(ap)) {
6165 ata_port_printk(ap, KERN_INFO,
6166 "%cATA max %s %s\n",
6167 (ap->flags & ATA_FLAG_SATA) ? 'S' : 'P',
6168 ata_mode_string(xfer_mask),
6169 ap->link.eh_info.desc);
6170 ata_ehi_clear_desc(&ap->link.eh_info);
6172 ata_port_printk(ap, KERN_INFO, "DUMMY\n");
6175 /* perform each probe asynchronously */
6176 for (i = 0; i < host->n_ports; i++) {
6177 struct ata_port *ap = host->ports[i];
6178 async_schedule(async_port_probe, ap);
6185 * ata_host_activate - start host, request IRQ and register it
6186 * @host: target ATA host
6187 * @irq: IRQ to request
6188 * @irq_handler: irq_handler used when requesting IRQ
6189 * @irq_flags: irq_flags used when requesting IRQ
6190 * @sht: scsi_host_template to use when registering the host
6192 * After allocating an ATA host and initializing it, most libata
6193 * LLDs perform three steps to activate the host - start host,
6194 * request IRQ and register it. This helper takes necessasry
6195 * arguments and performs the three steps in one go.
6197 * An invalid IRQ skips the IRQ registration and expects the host to
6198 * have set polling mode on the port. In this case, @irq_handler
6202 * Inherited from calling layer (may sleep).
6205 * 0 on success, -errno otherwise.
6207 int ata_host_activate(struct ata_host *host, int irq,
6208 irq_handler_t irq_handler, unsigned long irq_flags,
6209 struct scsi_host_template *sht)
6213 rc = ata_host_start(host);
6217 /* Special case for polling mode */
6219 WARN_ON(irq_handler);
6220 return ata_host_register(host, sht);
6223 rc = devm_request_irq(host->dev, irq, irq_handler, irq_flags,
6224 dev_driver_string(host->dev), host);
6228 for (i = 0; i < host->n_ports; i++)
6229 ata_port_desc(host->ports[i], "irq %d", irq);
6231 rc = ata_host_register(host, sht);
6232 /* if failed, just free the IRQ and leave ports alone */
6234 devm_free_irq(host->dev, irq, host);
6240 * ata_port_detach - Detach ATA port in prepration of device removal
6241 * @ap: ATA port to be detached
6243 * Detach all ATA devices and the associated SCSI devices of @ap;
6244 * then, remove the associated SCSI host. @ap is guaranteed to
6245 * be quiescent on return from this function.
6248 * Kernel thread context (may sleep).
6250 static void ata_port_detach(struct ata_port *ap)
6252 unsigned long flags;
6254 if (!ap->ops->error_handler)
6257 /* tell EH we're leaving & flush EH */
6258 spin_lock_irqsave(ap->lock, flags);
6259 ap->pflags |= ATA_PFLAG_UNLOADING;
6260 ata_port_schedule_eh(ap);
6261 spin_unlock_irqrestore(ap->lock, flags);
6263 /* wait till EH commits suicide */
6264 ata_port_wait_eh(ap);
6266 /* it better be dead now */
6267 WARN_ON(!(ap->pflags & ATA_PFLAG_UNLOADED));
6269 cancel_rearming_delayed_work(&ap->hotplug_task);
6272 /* remove the associated SCSI host */
6273 scsi_remove_host(ap->scsi_host);
6277 * ata_host_detach - Detach all ports of an ATA host
6278 * @host: Host to detach
6280 * Detach all ports of @host.
6283 * Kernel thread context (may sleep).
6285 void ata_host_detach(struct ata_host *host)
6289 for (i = 0; i < host->n_ports; i++)
6290 ata_port_detach(host->ports[i]);
6292 /* the host is dead now, dissociate ACPI */
6293 ata_acpi_dissociate(host);
6299 * ata_pci_remove_one - PCI layer callback for device removal
6300 * @pdev: PCI device that was removed
6302 * PCI layer indicates to libata via this hook that hot-unplug or
6303 * module unload event has occurred. Detach all ports. Resource
6304 * release is handled via devres.
6307 * Inherited from PCI layer (may sleep).
6309 void ata_pci_remove_one(struct pci_dev *pdev)
6311 struct device *dev = &pdev->dev;
6312 struct ata_host *host = dev_get_drvdata(dev);
6314 ata_host_detach(host);
6317 /* move to PCI subsystem */
6318 int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits)
6320 unsigned long tmp = 0;
6322 switch (bits->width) {
6325 pci_read_config_byte(pdev, bits->reg, &tmp8);
6331 pci_read_config_word(pdev, bits->reg, &tmp16);
6337 pci_read_config_dword(pdev, bits->reg, &tmp32);
6348 return (tmp == bits->val) ? 1 : 0;
6352 void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg)
6354 pci_save_state(pdev);
6355 pci_disable_device(pdev);
6357 if (mesg.event & PM_EVENT_SLEEP)
6358 pci_set_power_state(pdev, PCI_D3hot);
6361 int ata_pci_device_do_resume(struct pci_dev *pdev)
6365 pci_set_power_state(pdev, PCI_D0);
6366 pci_restore_state(pdev);
6368 rc = pcim_enable_device(pdev);
6370 dev_printk(KERN_ERR, &pdev->dev,
6371 "failed to enable device after resume (%d)\n", rc);
6375 pci_set_master(pdev);
6379 int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg)
6381 struct ata_host *host = dev_get_drvdata(&pdev->dev);
6384 rc = ata_host_suspend(host, mesg);
6388 ata_pci_device_do_suspend(pdev, mesg);
6393 int ata_pci_device_resume(struct pci_dev *pdev)
6395 struct ata_host *host = dev_get_drvdata(&pdev->dev);
6398 rc = ata_pci_device_do_resume(pdev);
6400 ata_host_resume(host);
6403 #endif /* CONFIG_PM */
6405 #endif /* CONFIG_PCI */
6407 static int __init ata_parse_force_one(char **cur,
6408 struct ata_force_ent *force_ent,
6409 const char **reason)
6411 /* FIXME: Currently, there's no way to tag init const data and
6412 * using __initdata causes build failure on some versions of
6413 * gcc. Once __initdataconst is implemented, add const to the
6414 * following structure.
6416 static struct ata_force_param force_tbl[] __initdata = {
6417 { "40c", .cbl = ATA_CBL_PATA40 },
6418 { "80c", .cbl = ATA_CBL_PATA80 },
6419 { "short40c", .cbl = ATA_CBL_PATA40_SHORT },
6420 { "unk", .cbl = ATA_CBL_PATA_UNK },
6421 { "ign", .cbl = ATA_CBL_PATA_IGN },
6422 { "sata", .cbl = ATA_CBL_SATA },
6423 { "1.5Gbps", .spd_limit = 1 },
6424 { "3.0Gbps", .spd_limit = 2 },
6425 { "noncq", .horkage_on = ATA_HORKAGE_NONCQ },
6426 { "ncq", .horkage_off = ATA_HORKAGE_NONCQ },
6427 { "pio0", .xfer_mask = 1 << (ATA_SHIFT_PIO + 0) },
6428 { "pio1", .xfer_mask = 1 << (ATA_SHIFT_PIO + 1) },
6429 { "pio2", .xfer_mask = 1 << (ATA_SHIFT_PIO + 2) },
6430 { "pio3", .xfer_mask = 1 << (ATA_SHIFT_PIO + 3) },
6431 { "pio4", .xfer_mask = 1 << (ATA_SHIFT_PIO + 4) },
6432 { "pio5", .xfer_mask = 1 << (ATA_SHIFT_PIO + 5) },
6433 { "pio6", .xfer_mask = 1 << (ATA_SHIFT_PIO + 6) },
6434 { "mwdma0", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 0) },
6435 { "mwdma1", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 1) },
6436 { "mwdma2", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 2) },
6437 { "mwdma3", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 3) },
6438 { "mwdma4", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 4) },
6439 { "udma0", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 0) },
6440 { "udma16", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 0) },
6441 { "udma/16", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 0) },
6442 { "udma1", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 1) },
6443 { "udma25", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 1) },
6444 { "udma/25", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 1) },
6445 { "udma2", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 2) },
6446 { "udma33", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 2) },
6447 { "udma/33", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 2) },
6448 { "udma3", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 3) },
6449 { "udma44", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 3) },
6450 { "udma/44", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 3) },
6451 { "udma4", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 4) },
6452 { "udma66", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 4) },
6453 { "udma/66", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 4) },
6454 { "udma5", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 5) },
6455 { "udma100", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 5) },
6456 { "udma/100", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 5) },
6457 { "udma6", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 6) },
6458 { "udma133", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 6) },
6459 { "udma/133", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 6) },
6460 { "udma7", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 7) },
6461 { "nohrst", .lflags = ATA_LFLAG_NO_HRST },
6462 { "nosrst", .lflags = ATA_LFLAG_NO_SRST },
6463 { "norst", .lflags = ATA_LFLAG_NO_HRST | ATA_LFLAG_NO_SRST },
6465 char *start = *cur, *p = *cur;
6466 char *id, *val, *endp;
6467 const struct ata_force_param *match_fp = NULL;
6468 int nr_matches = 0, i;
6470 /* find where this param ends and update *cur */
6471 while (*p != '\0' && *p != ',')
6482 p = strchr(start, ':');
6484 val = strstrip(start);
6489 id = strstrip(start);
6490 val = strstrip(p + 1);
6493 p = strchr(id, '.');
6496 force_ent->device = simple_strtoul(p, &endp, 10);
6497 if (p == endp || *endp != '\0') {
6498 *reason = "invalid device";
6503 force_ent->port = simple_strtoul(id, &endp, 10);
6504 if (p == endp || *endp != '\0') {
6505 *reason = "invalid port/link";
6510 /* parse val, allow shortcuts so that both 1.5 and 1.5Gbps work */
6511 for (i = 0; i < ARRAY_SIZE(force_tbl); i++) {
6512 const struct ata_force_param *fp = &force_tbl[i];
6514 if (strncasecmp(val, fp->name, strlen(val)))
6520 if (strcasecmp(val, fp->name) == 0) {
6527 *reason = "unknown value";
6530 if (nr_matches > 1) {
6531 *reason = "ambigious value";
6535 force_ent->param = *match_fp;
6540 static void __init ata_parse_force_param(void)
6542 int idx = 0, size = 1;
6543 int last_port = -1, last_device = -1;
6544 char *p, *cur, *next;
6546 /* calculate maximum number of params and allocate force_tbl */
6547 for (p = ata_force_param_buf; *p; p++)
6551 ata_force_tbl = kzalloc(sizeof(ata_force_tbl[0]) * size, GFP_KERNEL);
6552 if (!ata_force_tbl) {
6553 printk(KERN_WARNING "ata: failed to extend force table, "
6554 "libata.force ignored\n");
6558 /* parse and populate the table */
6559 for (cur = ata_force_param_buf; *cur != '\0'; cur = next) {
6560 const char *reason = "";
6561 struct ata_force_ent te = { .port = -1, .device = -1 };
6564 if (ata_parse_force_one(&next, &te, &reason)) {
6565 printk(KERN_WARNING "ata: failed to parse force "
6566 "parameter \"%s\" (%s)\n",
6571 if (te.port == -1) {
6572 te.port = last_port;
6573 te.device = last_device;
6576 ata_force_tbl[idx++] = te;
6578 last_port = te.port;
6579 last_device = te.device;
6582 ata_force_tbl_size = idx;
6585 static int __init ata_init(void)
6589 ata_parse_force_param();
6592 * FIXME: In UP case, there is only one workqueue thread and if you
6593 * have more than one PIO device, latency is bloody awful, with
6594 * occasional multi-second "hiccups" as one PIO device waits for
6595 * another. It's an ugly wart that users DO occasionally complain
6596 * about; luckily most users have at most one PIO polled device.
6598 ata_wq = create_workqueue("ata");
6602 ata_aux_wq = create_singlethread_workqueue("ata_aux");
6606 rc = ata_sff_init();
6610 printk(KERN_DEBUG "libata version " DRV_VERSION " loaded.\n");
6614 kfree(ata_force_tbl);
6616 destroy_workqueue(ata_wq);
6618 destroy_workqueue(ata_aux_wq);
6622 static void __exit ata_exit(void)
6625 kfree(ata_force_tbl);
6626 destroy_workqueue(ata_wq);
6627 destroy_workqueue(ata_aux_wq);
6630 subsys_initcall(ata_init);
6631 module_exit(ata_exit);
6633 static DEFINE_RATELIMIT_STATE(ratelimit, HZ / 5, 1);
6635 int ata_ratelimit(void)
6637 return __ratelimit(&ratelimit);
6641 * ata_wait_register - wait until register value changes
6642 * @reg: IO-mapped register
6643 * @mask: Mask to apply to read register value
6644 * @val: Wait condition
6645 * @interval: polling interval in milliseconds
6646 * @timeout: timeout in milliseconds
6648 * Waiting for some bits of register to change is a common
6649 * operation for ATA controllers. This function reads 32bit LE
6650 * IO-mapped register @reg and tests for the following condition.
6652 * (*@reg & mask) != val
6654 * If the condition is met, it returns; otherwise, the process is
6655 * repeated after @interval_msec until timeout.
6658 * Kernel thread context (may sleep)
6661 * The final register value.
6663 u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val,
6664 unsigned long interval, unsigned long timeout)
6666 unsigned long deadline;
6669 tmp = ioread32(reg);
6671 /* Calculate timeout _after_ the first read to make sure
6672 * preceding writes reach the controller before starting to
6673 * eat away the timeout.
6675 deadline = ata_deadline(jiffies, timeout);
6677 while ((tmp & mask) == val && time_before(jiffies, deadline)) {
6679 tmp = ioread32(reg);
6688 static unsigned int ata_dummy_qc_issue(struct ata_queued_cmd *qc)
6690 return AC_ERR_SYSTEM;
6693 static void ata_dummy_error_handler(struct ata_port *ap)
6698 struct ata_port_operations ata_dummy_port_ops = {
6699 .qc_prep = ata_noop_qc_prep,
6700 .qc_issue = ata_dummy_qc_issue,
6701 .error_handler = ata_dummy_error_handler,
6704 const struct ata_port_info ata_dummy_port_info = {
6705 .port_ops = &ata_dummy_port_ops,
6709 * libata is essentially a library of internal helper functions for
6710 * low-level ATA host controller drivers. As such, the API/ABI is
6711 * likely to change as new drivers are added and updated.
6712 * Do not depend on ABI/API stability.
6714 EXPORT_SYMBOL_GPL(sata_deb_timing_normal);
6715 EXPORT_SYMBOL_GPL(sata_deb_timing_hotplug);
6716 EXPORT_SYMBOL_GPL(sata_deb_timing_long);
6717 EXPORT_SYMBOL_GPL(ata_base_port_ops);
6718 EXPORT_SYMBOL_GPL(sata_port_ops);
6719 EXPORT_SYMBOL_GPL(ata_dummy_port_ops);
6720 EXPORT_SYMBOL_GPL(ata_dummy_port_info);
6721 EXPORT_SYMBOL_GPL(ata_link_next);
6722 EXPORT_SYMBOL_GPL(ata_dev_next);
6723 EXPORT_SYMBOL_GPL(ata_std_bios_param);
6724 EXPORT_SYMBOL_GPL(ata_host_init);
6725 EXPORT_SYMBOL_GPL(ata_host_alloc);
6726 EXPORT_SYMBOL_GPL(ata_host_alloc_pinfo);
6727 EXPORT_SYMBOL_GPL(ata_slave_link_init);
6728 EXPORT_SYMBOL_GPL(ata_host_start);
6729 EXPORT_SYMBOL_GPL(ata_host_register);
6730 EXPORT_SYMBOL_GPL(ata_host_activate);
6731 EXPORT_SYMBOL_GPL(ata_host_detach);
6732 EXPORT_SYMBOL_GPL(ata_sg_init);
6733 EXPORT_SYMBOL_GPL(ata_qc_complete);
6734 EXPORT_SYMBOL_GPL(ata_qc_complete_multiple);
6735 EXPORT_SYMBOL_GPL(atapi_cmd_type);
6736 EXPORT_SYMBOL_GPL(ata_tf_to_fis);
6737 EXPORT_SYMBOL_GPL(ata_tf_from_fis);
6738 EXPORT_SYMBOL_GPL(ata_pack_xfermask);
6739 EXPORT_SYMBOL_GPL(ata_unpack_xfermask);
6740 EXPORT_SYMBOL_GPL(ata_xfer_mask2mode);
6741 EXPORT_SYMBOL_GPL(ata_xfer_mode2mask);
6742 EXPORT_SYMBOL_GPL(ata_xfer_mode2shift);
6743 EXPORT_SYMBOL_GPL(ata_mode_string);
6744 EXPORT_SYMBOL_GPL(ata_id_xfermask);
6745 EXPORT_SYMBOL_GPL(ata_do_set_mode);
6746 EXPORT_SYMBOL_GPL(ata_std_qc_defer);
6747 EXPORT_SYMBOL_GPL(ata_noop_qc_prep);
6748 EXPORT_SYMBOL_GPL(ata_dev_disable);
6749 EXPORT_SYMBOL_GPL(sata_set_spd);
6750 EXPORT_SYMBOL_GPL(ata_wait_after_reset);
6751 EXPORT_SYMBOL_GPL(sata_link_debounce);
6752 EXPORT_SYMBOL_GPL(sata_link_resume);
6753 EXPORT_SYMBOL_GPL(ata_std_prereset);
6754 EXPORT_SYMBOL_GPL(sata_link_hardreset);
6755 EXPORT_SYMBOL_GPL(sata_std_hardreset);
6756 EXPORT_SYMBOL_GPL(ata_std_postreset);
6757 EXPORT_SYMBOL_GPL(ata_dev_classify);
6758 EXPORT_SYMBOL_GPL(ata_dev_pair);
6759 EXPORT_SYMBOL_GPL(ata_ratelimit);
6760 EXPORT_SYMBOL_GPL(ata_wait_register);
6761 EXPORT_SYMBOL_GPL(ata_scsi_queuecmd);
6762 EXPORT_SYMBOL_GPL(ata_scsi_slave_config);
6763 EXPORT_SYMBOL_GPL(ata_scsi_slave_destroy);
6764 EXPORT_SYMBOL_GPL(ata_scsi_change_queue_depth);
6765 EXPORT_SYMBOL_GPL(sata_scr_valid);
6766 EXPORT_SYMBOL_GPL(sata_scr_read);
6767 EXPORT_SYMBOL_GPL(sata_scr_write);
6768 EXPORT_SYMBOL_GPL(sata_scr_write_flush);
6769 EXPORT_SYMBOL_GPL(ata_link_online);
6770 EXPORT_SYMBOL_GPL(ata_link_offline);
6772 EXPORT_SYMBOL_GPL(ata_host_suspend);
6773 EXPORT_SYMBOL_GPL(ata_host_resume);
6774 #endif /* CONFIG_PM */
6775 EXPORT_SYMBOL_GPL(ata_id_string);
6776 EXPORT_SYMBOL_GPL(ata_id_c_string);
6777 EXPORT_SYMBOL_GPL(ata_do_dev_read_id);
6778 EXPORT_SYMBOL_GPL(ata_scsi_simulate);
6780 EXPORT_SYMBOL_GPL(ata_pio_queue_task);
6781 EXPORT_SYMBOL_GPL(ata_pio_need_iordy);
6782 EXPORT_SYMBOL_GPL(ata_timing_find_mode);
6783 EXPORT_SYMBOL_GPL(ata_timing_compute);
6784 EXPORT_SYMBOL_GPL(ata_timing_merge);
6785 EXPORT_SYMBOL_GPL(ata_timing_cycle2mode);
6788 EXPORT_SYMBOL_GPL(pci_test_config_bits);
6789 EXPORT_SYMBOL_GPL(ata_pci_remove_one);
6791 EXPORT_SYMBOL_GPL(ata_pci_device_do_suspend);
6792 EXPORT_SYMBOL_GPL(ata_pci_device_do_resume);
6793 EXPORT_SYMBOL_GPL(ata_pci_device_suspend);
6794 EXPORT_SYMBOL_GPL(ata_pci_device_resume);
6795 #endif /* CONFIG_PM */
6796 #endif /* CONFIG_PCI */
6798 EXPORT_SYMBOL_GPL(__ata_ehi_push_desc);
6799 EXPORT_SYMBOL_GPL(ata_ehi_push_desc);
6800 EXPORT_SYMBOL_GPL(ata_ehi_clear_desc);
6801 EXPORT_SYMBOL_GPL(ata_port_desc);
6803 EXPORT_SYMBOL_GPL(ata_port_pbar_desc);
6804 #endif /* CONFIG_PCI */
6805 EXPORT_SYMBOL_GPL(ata_port_schedule_eh);
6806 EXPORT_SYMBOL_GPL(ata_link_abort);
6807 EXPORT_SYMBOL_GPL(ata_port_abort);
6808 EXPORT_SYMBOL_GPL(ata_port_freeze);
6809 EXPORT_SYMBOL_GPL(sata_async_notification);
6810 EXPORT_SYMBOL_GPL(ata_eh_freeze_port);
6811 EXPORT_SYMBOL_GPL(ata_eh_thaw_port);
6812 EXPORT_SYMBOL_GPL(ata_eh_qc_complete);
6813 EXPORT_SYMBOL_GPL(ata_eh_qc_retry);
6814 EXPORT_SYMBOL_GPL(ata_eh_analyze_ncq_error);
6815 EXPORT_SYMBOL_GPL(ata_do_eh);
6816 EXPORT_SYMBOL_GPL(ata_std_error_handler);
6818 EXPORT_SYMBOL_GPL(ata_cable_40wire);
6819 EXPORT_SYMBOL_GPL(ata_cable_80wire);
6820 EXPORT_SYMBOL_GPL(ata_cable_unknown);
6821 EXPORT_SYMBOL_GPL(ata_cable_ignore);
6822 EXPORT_SYMBOL_GPL(ata_cable_sata);