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/highmem.h>
50 #include <linux/spinlock.h>
51 #include <linux/blkdev.h>
52 #include <linux/delay.h>
53 #include <linux/timer.h>
54 #include <linux/interrupt.h>
55 #include <linux/completion.h>
56 #include <linux/suspend.h>
57 #include <linux/workqueue.h>
58 #include <linux/jiffies.h>
59 #include <linux/scatterlist.h>
61 #include <scsi/scsi.h>
62 #include <scsi/scsi_cmnd.h>
63 #include <scsi/scsi_host.h>
64 #include <linux/libata.h>
65 #include <asm/semaphore.h>
66 #include <asm/byteorder.h>
67 #include <linux/cdrom.h>
72 /* debounce timing parameters in msecs { interval, duration, timeout } */
73 const unsigned long sata_deb_timing_normal[] = { 5, 100, 2000 };
74 const unsigned long sata_deb_timing_hotplug[] = { 25, 500, 2000 };
75 const unsigned long sata_deb_timing_long[] = { 100, 2000, 5000 };
77 static unsigned int ata_dev_init_params(struct ata_device *dev,
78 u16 heads, u16 sectors);
79 static unsigned int ata_dev_set_xfermode(struct ata_device *dev);
80 static unsigned int ata_dev_set_feature(struct ata_device *dev,
81 u8 enable, u8 feature);
82 static void ata_dev_xfermask(struct ata_device *dev);
83 static unsigned long ata_dev_blacklisted(const struct ata_device *dev);
85 unsigned int ata_print_id = 1;
86 static struct workqueue_struct *ata_wq;
88 struct workqueue_struct *ata_aux_wq;
90 int atapi_enabled = 1;
91 module_param(atapi_enabled, int, 0444);
92 MODULE_PARM_DESC(atapi_enabled, "Enable discovery of ATAPI devices (0=off, 1=on)");
95 module_param(atapi_dmadir, int, 0444);
96 MODULE_PARM_DESC(atapi_dmadir, "Enable ATAPI DMADIR bridge support (0=off, 1=on)");
98 int atapi_passthru16 = 1;
99 module_param(atapi_passthru16, int, 0444);
100 MODULE_PARM_DESC(atapi_passthru16, "Enable ATA_16 passthru for ATAPI devices; on by default (0=off, 1=on)");
103 module_param_named(fua, libata_fua, int, 0444);
104 MODULE_PARM_DESC(fua, "FUA support (0=off, 1=on)");
106 static int ata_ignore_hpa;
107 module_param_named(ignore_hpa, ata_ignore_hpa, int, 0644);
108 MODULE_PARM_DESC(ignore_hpa, "Ignore HPA limit (0=keep BIOS limits, 1=ignore limits, using full disk)");
110 static int libata_dma_mask = ATA_DMA_MASK_ATA|ATA_DMA_MASK_ATAPI|ATA_DMA_MASK_CFA;
111 module_param_named(dma, libata_dma_mask, int, 0444);
112 MODULE_PARM_DESC(dma, "DMA enable/disable (0x1==ATA, 0x2==ATAPI, 0x4==CF)");
114 static int ata_probe_timeout = ATA_TMOUT_INTERNAL / HZ;
115 module_param(ata_probe_timeout, int, 0444);
116 MODULE_PARM_DESC(ata_probe_timeout, "Set ATA probing timeout (seconds)");
118 int libata_noacpi = 0;
119 module_param_named(noacpi, libata_noacpi, int, 0444);
120 MODULE_PARM_DESC(noacpi, "Disables the use of ACPI in probe/suspend/resume when set");
122 int libata_allow_tpm = 0;
123 module_param_named(allow_tpm, libata_allow_tpm, int, 0444);
124 MODULE_PARM_DESC(allow_tpm, "Permit the use of TPM commands");
126 MODULE_AUTHOR("Jeff Garzik");
127 MODULE_DESCRIPTION("Library module for ATA devices");
128 MODULE_LICENSE("GPL");
129 MODULE_VERSION(DRV_VERSION);
133 * ata_tf_to_fis - Convert ATA taskfile to SATA FIS structure
134 * @tf: Taskfile to convert
135 * @pmp: Port multiplier port
136 * @is_cmd: This FIS is for command
137 * @fis: Buffer into which data will output
139 * Converts a standard ATA taskfile to a Serial ATA
140 * FIS structure (Register - Host to Device).
143 * Inherited from caller.
145 void ata_tf_to_fis(const struct ata_taskfile *tf, u8 pmp, int is_cmd, u8 *fis)
147 fis[0] = 0x27; /* Register - Host to Device FIS */
148 fis[1] = pmp & 0xf; /* Port multiplier number*/
150 fis[1] |= (1 << 7); /* bit 7 indicates Command FIS */
152 fis[2] = tf->command;
153 fis[3] = tf->feature;
160 fis[8] = tf->hob_lbal;
161 fis[9] = tf->hob_lbam;
162 fis[10] = tf->hob_lbah;
163 fis[11] = tf->hob_feature;
166 fis[13] = tf->hob_nsect;
177 * ata_tf_from_fis - Convert SATA FIS to ATA taskfile
178 * @fis: Buffer from which data will be input
179 * @tf: Taskfile to output
181 * Converts a serial ATA FIS structure to a standard ATA taskfile.
184 * Inherited from caller.
187 void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf)
189 tf->command = fis[2]; /* status */
190 tf->feature = fis[3]; /* error */
197 tf->hob_lbal = fis[8];
198 tf->hob_lbam = fis[9];
199 tf->hob_lbah = fis[10];
202 tf->hob_nsect = fis[13];
205 static const u8 ata_rw_cmds[] = {
209 ATA_CMD_READ_MULTI_EXT,
210 ATA_CMD_WRITE_MULTI_EXT,
214 ATA_CMD_WRITE_MULTI_FUA_EXT,
218 ATA_CMD_PIO_READ_EXT,
219 ATA_CMD_PIO_WRITE_EXT,
232 ATA_CMD_WRITE_FUA_EXT
236 * ata_rwcmd_protocol - set taskfile r/w commands and protocol
237 * @tf: command to examine and configure
238 * @dev: device tf belongs to
240 * Examine the device configuration and tf->flags to calculate
241 * the proper read/write commands and protocol to use.
246 static int ata_rwcmd_protocol(struct ata_taskfile *tf, struct ata_device *dev)
250 int index, fua, lba48, write;
252 fua = (tf->flags & ATA_TFLAG_FUA) ? 4 : 0;
253 lba48 = (tf->flags & ATA_TFLAG_LBA48) ? 2 : 0;
254 write = (tf->flags & ATA_TFLAG_WRITE) ? 1 : 0;
256 if (dev->flags & ATA_DFLAG_PIO) {
257 tf->protocol = ATA_PROT_PIO;
258 index = dev->multi_count ? 0 : 8;
259 } else if (lba48 && (dev->link->ap->flags & ATA_FLAG_PIO_LBA48)) {
260 /* Unable to use DMA due to host limitation */
261 tf->protocol = ATA_PROT_PIO;
262 index = dev->multi_count ? 0 : 8;
264 tf->protocol = ATA_PROT_DMA;
268 cmd = ata_rw_cmds[index + fua + lba48 + write];
277 * ata_tf_read_block - Read block address from ATA taskfile
278 * @tf: ATA taskfile of interest
279 * @dev: ATA device @tf belongs to
284 * Read block address from @tf. This function can handle all
285 * three address formats - LBA, LBA48 and CHS. tf->protocol and
286 * flags select the address format to use.
289 * Block address read from @tf.
291 u64 ata_tf_read_block(struct ata_taskfile *tf, struct ata_device *dev)
295 if (tf->flags & ATA_TFLAG_LBA) {
296 if (tf->flags & ATA_TFLAG_LBA48) {
297 block |= (u64)tf->hob_lbah << 40;
298 block |= (u64)tf->hob_lbam << 32;
299 block |= tf->hob_lbal << 24;
301 block |= (tf->device & 0xf) << 24;
303 block |= tf->lbah << 16;
304 block |= tf->lbam << 8;
309 cyl = tf->lbam | (tf->lbah << 8);
310 head = tf->device & 0xf;
313 block = (cyl * dev->heads + head) * dev->sectors + sect;
320 * ata_build_rw_tf - Build ATA taskfile for given read/write request
321 * @tf: Target ATA taskfile
322 * @dev: ATA device @tf belongs to
323 * @block: Block address
324 * @n_block: Number of blocks
325 * @tf_flags: RW/FUA etc...
331 * Build ATA taskfile @tf for read/write request described by
332 * @block, @n_block, @tf_flags and @tag on @dev.
336 * 0 on success, -ERANGE if the request is too large for @dev,
337 * -EINVAL if the request is invalid.
339 int ata_build_rw_tf(struct ata_taskfile *tf, struct ata_device *dev,
340 u64 block, u32 n_block, unsigned int tf_flags,
343 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
344 tf->flags |= tf_flags;
346 if (ata_ncq_enabled(dev) && likely(tag != ATA_TAG_INTERNAL)) {
348 if (!lba_48_ok(block, n_block))
351 tf->protocol = ATA_PROT_NCQ;
352 tf->flags |= ATA_TFLAG_LBA | ATA_TFLAG_LBA48;
354 if (tf->flags & ATA_TFLAG_WRITE)
355 tf->command = ATA_CMD_FPDMA_WRITE;
357 tf->command = ATA_CMD_FPDMA_READ;
359 tf->nsect = tag << 3;
360 tf->hob_feature = (n_block >> 8) & 0xff;
361 tf->feature = n_block & 0xff;
363 tf->hob_lbah = (block >> 40) & 0xff;
364 tf->hob_lbam = (block >> 32) & 0xff;
365 tf->hob_lbal = (block >> 24) & 0xff;
366 tf->lbah = (block >> 16) & 0xff;
367 tf->lbam = (block >> 8) & 0xff;
368 tf->lbal = block & 0xff;
371 if (tf->flags & ATA_TFLAG_FUA)
372 tf->device |= 1 << 7;
373 } else if (dev->flags & ATA_DFLAG_LBA) {
374 tf->flags |= ATA_TFLAG_LBA;
376 if (lba_28_ok(block, n_block)) {
378 tf->device |= (block >> 24) & 0xf;
379 } else if (lba_48_ok(block, n_block)) {
380 if (!(dev->flags & ATA_DFLAG_LBA48))
384 tf->flags |= ATA_TFLAG_LBA48;
386 tf->hob_nsect = (n_block >> 8) & 0xff;
388 tf->hob_lbah = (block >> 40) & 0xff;
389 tf->hob_lbam = (block >> 32) & 0xff;
390 tf->hob_lbal = (block >> 24) & 0xff;
392 /* request too large even for LBA48 */
395 if (unlikely(ata_rwcmd_protocol(tf, dev) < 0))
398 tf->nsect = n_block & 0xff;
400 tf->lbah = (block >> 16) & 0xff;
401 tf->lbam = (block >> 8) & 0xff;
402 tf->lbal = block & 0xff;
404 tf->device |= ATA_LBA;
407 u32 sect, head, cyl, track;
409 /* The request -may- be too large for CHS addressing. */
410 if (!lba_28_ok(block, n_block))
413 if (unlikely(ata_rwcmd_protocol(tf, dev) < 0))
416 /* Convert LBA to CHS */
417 track = (u32)block / dev->sectors;
418 cyl = track / dev->heads;
419 head = track % dev->heads;
420 sect = (u32)block % dev->sectors + 1;
422 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
423 (u32)block, track, cyl, head, sect);
425 /* Check whether the converted CHS can fit.
429 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
432 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
443 * ata_pack_xfermask - Pack pio, mwdma and udma masks into xfer_mask
444 * @pio_mask: pio_mask
445 * @mwdma_mask: mwdma_mask
446 * @udma_mask: udma_mask
448 * Pack @pio_mask, @mwdma_mask and @udma_mask into a single
449 * unsigned int xfer_mask.
457 unsigned long ata_pack_xfermask(unsigned long pio_mask,
458 unsigned long mwdma_mask,
459 unsigned long udma_mask)
461 return ((pio_mask << ATA_SHIFT_PIO) & ATA_MASK_PIO) |
462 ((mwdma_mask << ATA_SHIFT_MWDMA) & ATA_MASK_MWDMA) |
463 ((udma_mask << ATA_SHIFT_UDMA) & ATA_MASK_UDMA);
467 * ata_unpack_xfermask - Unpack xfer_mask into pio, mwdma and udma masks
468 * @xfer_mask: xfer_mask to unpack
469 * @pio_mask: resulting pio_mask
470 * @mwdma_mask: resulting mwdma_mask
471 * @udma_mask: resulting udma_mask
473 * Unpack @xfer_mask into @pio_mask, @mwdma_mask and @udma_mask.
474 * Any NULL distination masks will be ignored.
476 void ata_unpack_xfermask(unsigned long xfer_mask, unsigned long *pio_mask,
477 unsigned long *mwdma_mask, unsigned long *udma_mask)
480 *pio_mask = (xfer_mask & ATA_MASK_PIO) >> ATA_SHIFT_PIO;
482 *mwdma_mask = (xfer_mask & ATA_MASK_MWDMA) >> ATA_SHIFT_MWDMA;
484 *udma_mask = (xfer_mask & ATA_MASK_UDMA) >> ATA_SHIFT_UDMA;
487 static const struct ata_xfer_ent {
491 { ATA_SHIFT_PIO, ATA_NR_PIO_MODES, XFER_PIO_0 },
492 { ATA_SHIFT_MWDMA, ATA_NR_MWDMA_MODES, XFER_MW_DMA_0 },
493 { ATA_SHIFT_UDMA, ATA_NR_UDMA_MODES, XFER_UDMA_0 },
498 * ata_xfer_mask2mode - Find matching XFER_* for the given xfer_mask
499 * @xfer_mask: xfer_mask of interest
501 * Return matching XFER_* value for @xfer_mask. Only the highest
502 * bit of @xfer_mask is considered.
508 * Matching XFER_* value, 0xff if no match found.
510 u8 ata_xfer_mask2mode(unsigned long xfer_mask)
512 int highbit = fls(xfer_mask) - 1;
513 const struct ata_xfer_ent *ent;
515 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
516 if (highbit >= ent->shift && highbit < ent->shift + ent->bits)
517 return ent->base + highbit - ent->shift;
522 * ata_xfer_mode2mask - Find matching xfer_mask for XFER_*
523 * @xfer_mode: XFER_* of interest
525 * Return matching xfer_mask for @xfer_mode.
531 * Matching xfer_mask, 0 if no match found.
533 unsigned long ata_xfer_mode2mask(u8 xfer_mode)
535 const struct ata_xfer_ent *ent;
537 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
538 if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits)
539 return ((2 << (ent->shift + xfer_mode - ent->base)) - 1)
540 & ~((1 << ent->shift) - 1);
545 * ata_xfer_mode2shift - Find matching xfer_shift for XFER_*
546 * @xfer_mode: XFER_* of interest
548 * Return matching xfer_shift for @xfer_mode.
554 * Matching xfer_shift, -1 if no match found.
556 int ata_xfer_mode2shift(unsigned long xfer_mode)
558 const struct ata_xfer_ent *ent;
560 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
561 if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits)
567 * ata_mode_string - convert xfer_mask to string
568 * @xfer_mask: mask of bits supported; only highest bit counts.
570 * Determine string which represents the highest speed
571 * (highest bit in @modemask).
577 * Constant C string representing highest speed listed in
578 * @mode_mask, or the constant C string "<n/a>".
580 const char *ata_mode_string(unsigned long xfer_mask)
582 static const char * const xfer_mode_str[] = {
606 highbit = fls(xfer_mask) - 1;
607 if (highbit >= 0 && highbit < ARRAY_SIZE(xfer_mode_str))
608 return xfer_mode_str[highbit];
612 static const char *sata_spd_string(unsigned int spd)
614 static const char * const spd_str[] = {
619 if (spd == 0 || (spd - 1) >= ARRAY_SIZE(spd_str))
621 return spd_str[spd - 1];
624 void ata_dev_disable(struct ata_device *dev)
626 if (ata_dev_enabled(dev)) {
627 if (ata_msg_drv(dev->link->ap))
628 ata_dev_printk(dev, KERN_WARNING, "disabled\n");
629 ata_acpi_on_disable(dev);
630 ata_down_xfermask_limit(dev, ATA_DNXFER_FORCE_PIO0 |
636 static int ata_dev_set_dipm(struct ata_device *dev, enum link_pm policy)
638 struct ata_link *link = dev->link;
639 struct ata_port *ap = link->ap;
641 unsigned int err_mask;
645 * disallow DIPM for drivers which haven't set
646 * ATA_FLAG_IPM. This is because when DIPM is enabled,
647 * phy ready will be set in the interrupt status on
648 * state changes, which will cause some drivers to
649 * think there are errors - additionally drivers will
650 * need to disable hot plug.
652 if (!(ap->flags & ATA_FLAG_IPM) || !ata_dev_enabled(dev)) {
653 ap->pm_policy = NOT_AVAILABLE;
658 * For DIPM, we will only enable it for the
661 * Why? Because Disks are too stupid to know that
662 * If the host rejects a request to go to SLUMBER
663 * they should retry at PARTIAL, and instead it
664 * just would give up. So, for medium_power to
665 * work at all, we need to only allow HIPM.
667 rc = sata_scr_read(link, SCR_CONTROL, &scontrol);
673 /* no restrictions on IPM transitions */
674 scontrol &= ~(0x3 << 8);
675 rc = sata_scr_write(link, SCR_CONTROL, scontrol);
680 if (dev->flags & ATA_DFLAG_DIPM)
681 err_mask = ata_dev_set_feature(dev,
682 SETFEATURES_SATA_ENABLE, SATA_DIPM);
685 /* allow IPM to PARTIAL */
686 scontrol &= ~(0x1 << 8);
687 scontrol |= (0x2 << 8);
688 rc = sata_scr_write(link, SCR_CONTROL, scontrol);
693 * we don't have to disable DIPM since IPM flags
694 * disallow transitions to SLUMBER, which effectively
695 * disable DIPM if it does not support PARTIAL
699 case MAX_PERFORMANCE:
700 /* disable all IPM transitions */
701 scontrol |= (0x3 << 8);
702 rc = sata_scr_write(link, SCR_CONTROL, scontrol);
707 * we don't have to disable DIPM since IPM flags
708 * disallow all transitions which effectively
709 * disable DIPM anyway.
714 /* FIXME: handle SET FEATURES failure */
721 * ata_dev_enable_pm - enable SATA interface power management
722 * @dev: device to enable power management
723 * @policy: the link power management policy
725 * Enable SATA Interface power management. This will enable
726 * Device Interface Power Management (DIPM) for min_power
727 * policy, and then call driver specific callbacks for
728 * enabling Host Initiated Power management.
731 * Returns: -EINVAL if IPM is not supported, 0 otherwise.
733 void ata_dev_enable_pm(struct ata_device *dev, enum link_pm policy)
736 struct ata_port *ap = dev->link->ap;
738 /* set HIPM first, then DIPM */
739 if (ap->ops->enable_pm)
740 rc = ap->ops->enable_pm(ap, policy);
743 rc = ata_dev_set_dipm(dev, policy);
747 ap->pm_policy = MAX_PERFORMANCE;
749 ap->pm_policy = policy;
750 return /* rc */; /* hopefully we can use 'rc' eventually */
755 * ata_dev_disable_pm - disable SATA interface power management
756 * @dev: device to disable power management
758 * Disable SATA Interface power management. This will disable
759 * Device Interface Power Management (DIPM) without changing
760 * policy, call driver specific callbacks for disabling Host
761 * Initiated Power management.
766 static void ata_dev_disable_pm(struct ata_device *dev)
768 struct ata_port *ap = dev->link->ap;
770 ata_dev_set_dipm(dev, MAX_PERFORMANCE);
771 if (ap->ops->disable_pm)
772 ap->ops->disable_pm(ap);
774 #endif /* CONFIG_PM */
776 void ata_lpm_schedule(struct ata_port *ap, enum link_pm policy)
778 ap->pm_policy = policy;
779 ap->link.eh_info.action |= ATA_EHI_LPM;
780 ap->link.eh_info.flags |= ATA_EHI_NO_AUTOPSY;
781 ata_port_schedule_eh(ap);
785 static void ata_lpm_enable(struct ata_host *host)
787 struct ata_link *link;
789 struct ata_device *dev;
792 for (i = 0; i < host->n_ports; i++) {
794 ata_port_for_each_link(link, ap) {
795 ata_link_for_each_dev(dev, link)
796 ata_dev_disable_pm(dev);
801 static void ata_lpm_disable(struct ata_host *host)
805 for (i = 0; i < host->n_ports; i++) {
806 struct ata_port *ap = host->ports[i];
807 ata_lpm_schedule(ap, ap->pm_policy);
810 #endif /* CONFIG_PM */
814 * ata_devchk - PATA device presence detection
815 * @ap: ATA channel to examine
816 * @device: Device to examine (starting at zero)
818 * This technique was originally described in
819 * Hale Landis's ATADRVR (www.ata-atapi.com), and
820 * later found its way into the ATA/ATAPI spec.
822 * Write a pattern to the ATA shadow registers,
823 * and if a device is present, it will respond by
824 * correctly storing and echoing back the
825 * ATA shadow register contents.
831 static unsigned int ata_devchk(struct ata_port *ap, unsigned int device)
833 struct ata_ioports *ioaddr = &ap->ioaddr;
836 ap->ops->dev_select(ap, device);
838 iowrite8(0x55, ioaddr->nsect_addr);
839 iowrite8(0xaa, ioaddr->lbal_addr);
841 iowrite8(0xaa, ioaddr->nsect_addr);
842 iowrite8(0x55, ioaddr->lbal_addr);
844 iowrite8(0x55, ioaddr->nsect_addr);
845 iowrite8(0xaa, ioaddr->lbal_addr);
847 nsect = ioread8(ioaddr->nsect_addr);
848 lbal = ioread8(ioaddr->lbal_addr);
850 if ((nsect == 0x55) && (lbal == 0xaa))
851 return 1; /* we found a device */
853 return 0; /* nothing found */
857 * ata_dev_classify - determine device type based on ATA-spec signature
858 * @tf: ATA taskfile register set for device to be identified
860 * Determine from taskfile register contents whether a device is
861 * ATA or ATAPI, as per "Signature and persistence" section
862 * of ATA/PI spec (volume 1, sect 5.14).
868 * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, %ATA_DEV_PMP or
869 * %ATA_DEV_UNKNOWN the event of failure.
871 unsigned int ata_dev_classify(const struct ata_taskfile *tf)
873 /* Apple's open source Darwin code hints that some devices only
874 * put a proper signature into the LBA mid/high registers,
875 * So, we only check those. It's sufficient for uniqueness.
877 * ATA/ATAPI-7 (d1532v1r1: Feb. 19, 2003) specified separate
878 * signatures for ATA and ATAPI devices attached on SerialATA,
879 * 0x3c/0xc3 and 0x69/0x96 respectively. However, SerialATA
880 * spec has never mentioned about using different signatures
881 * for ATA/ATAPI devices. Then, Serial ATA II: Port
882 * Multiplier specification began to use 0x69/0x96 to identify
883 * port multpliers and 0x3c/0xc3 to identify SEMB device.
884 * ATA/ATAPI-7 dropped descriptions about 0x3c/0xc3 and
885 * 0x69/0x96 shortly and described them as reserved for
888 * We follow the current spec and consider that 0x69/0x96
889 * identifies a port multiplier and 0x3c/0xc3 a SEMB device.
891 if ((tf->lbam == 0) && (tf->lbah == 0)) {
892 DPRINTK("found ATA device by sig\n");
896 if ((tf->lbam == 0x14) && (tf->lbah == 0xeb)) {
897 DPRINTK("found ATAPI device by sig\n");
898 return ATA_DEV_ATAPI;
901 if ((tf->lbam == 0x69) && (tf->lbah == 0x96)) {
902 DPRINTK("found PMP device by sig\n");
906 if ((tf->lbam == 0x3c) && (tf->lbah == 0xc3)) {
907 printk(KERN_INFO "ata: SEMB device ignored\n");
908 return ATA_DEV_SEMB_UNSUP; /* not yet */
911 DPRINTK("unknown device\n");
912 return ATA_DEV_UNKNOWN;
916 * ata_dev_try_classify - Parse returned ATA device signature
917 * @dev: ATA device to classify (starting at zero)
918 * @present: device seems present
919 * @r_err: Value of error register on completion
921 * After an event -- SRST, E.D.D., or SATA COMRESET -- occurs,
922 * an ATA/ATAPI-defined set of values is placed in the ATA
923 * shadow registers, indicating the results of device detection
926 * Select the ATA device, and read the values from the ATA shadow
927 * registers. Then parse according to the Error register value,
928 * and the spec-defined values examined by ata_dev_classify().
934 * Device type - %ATA_DEV_ATA, %ATA_DEV_ATAPI or %ATA_DEV_NONE.
936 unsigned int ata_dev_try_classify(struct ata_device *dev, int present,
939 struct ata_port *ap = dev->link->ap;
940 struct ata_taskfile tf;
944 ap->ops->dev_select(ap, dev->devno);
946 memset(&tf, 0, sizeof(tf));
948 ap->ops->tf_read(ap, &tf);
953 /* see if device passed diags: continue and warn later */
955 /* diagnostic fail : do nothing _YET_ */
956 dev->horkage |= ATA_HORKAGE_DIAGNOSTIC;
959 else if ((dev->devno == 0) && (err == 0x81))
964 /* determine if device is ATA or ATAPI */
965 class = ata_dev_classify(&tf);
967 if (class == ATA_DEV_UNKNOWN) {
968 /* If the device failed diagnostic, it's likely to
969 * have reported incorrect device signature too.
970 * Assume ATA device if the device seems present but
971 * device signature is invalid with diagnostic
974 if (present && (dev->horkage & ATA_HORKAGE_DIAGNOSTIC))
977 class = ATA_DEV_NONE;
978 } else if ((class == ATA_DEV_ATA) && (ata_chk_status(ap) == 0))
979 class = ATA_DEV_NONE;
985 * ata_id_string - Convert IDENTIFY DEVICE page into string
986 * @id: IDENTIFY DEVICE results we will examine
987 * @s: string into which data is output
988 * @ofs: offset into identify device page
989 * @len: length of string to return. must be an even number.
991 * The strings in the IDENTIFY DEVICE page are broken up into
992 * 16-bit chunks. Run through the string, and output each
993 * 8-bit chunk linearly, regardless of platform.
999 void ata_id_string(const u16 *id, unsigned char *s,
1000 unsigned int ofs, unsigned int len)
1019 * ata_id_c_string - Convert IDENTIFY DEVICE page into C string
1020 * @id: IDENTIFY DEVICE results we will examine
1021 * @s: string into which data is output
1022 * @ofs: offset into identify device page
1023 * @len: length of string to return. must be an odd number.
1025 * This function is identical to ata_id_string except that it
1026 * trims trailing spaces and terminates the resulting string with
1027 * null. @len must be actual maximum length (even number) + 1.
1032 void ata_id_c_string(const u16 *id, unsigned char *s,
1033 unsigned int ofs, unsigned int len)
1037 WARN_ON(!(len & 1));
1039 ata_id_string(id, s, ofs, len - 1);
1041 p = s + strnlen(s, len - 1);
1042 while (p > s && p[-1] == ' ')
1047 static u64 ata_id_n_sectors(const u16 *id)
1049 if (ata_id_has_lba(id)) {
1050 if (ata_id_has_lba48(id))
1051 return ata_id_u64(id, 100);
1053 return ata_id_u32(id, 60);
1055 if (ata_id_current_chs_valid(id))
1056 return ata_id_u32(id, 57);
1058 return id[1] * id[3] * id[6];
1062 static u64 ata_tf_to_lba48(struct ata_taskfile *tf)
1066 sectors |= ((u64)(tf->hob_lbah & 0xff)) << 40;
1067 sectors |= ((u64)(tf->hob_lbam & 0xff)) << 32;
1068 sectors |= (tf->hob_lbal & 0xff) << 24;
1069 sectors |= (tf->lbah & 0xff) << 16;
1070 sectors |= (tf->lbam & 0xff) << 8;
1071 sectors |= (tf->lbal & 0xff);
1076 static u64 ata_tf_to_lba(struct ata_taskfile *tf)
1080 sectors |= (tf->device & 0x0f) << 24;
1081 sectors |= (tf->lbah & 0xff) << 16;
1082 sectors |= (tf->lbam & 0xff) << 8;
1083 sectors |= (tf->lbal & 0xff);
1089 * ata_read_native_max_address - Read native max address
1090 * @dev: target device
1091 * @max_sectors: out parameter for the result native max address
1093 * Perform an LBA48 or LBA28 native size query upon the device in
1097 * 0 on success, -EACCES if command is aborted by the drive.
1098 * -EIO on other errors.
1100 static int ata_read_native_max_address(struct ata_device *dev, u64 *max_sectors)
1102 unsigned int err_mask;
1103 struct ata_taskfile tf;
1104 int lba48 = ata_id_has_lba48(dev->id);
1106 ata_tf_init(dev, &tf);
1108 /* always clear all address registers */
1109 tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
1112 tf.command = ATA_CMD_READ_NATIVE_MAX_EXT;
1113 tf.flags |= ATA_TFLAG_LBA48;
1115 tf.command = ATA_CMD_READ_NATIVE_MAX;
1117 tf.protocol |= ATA_PROT_NODATA;
1118 tf.device |= ATA_LBA;
1120 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
1122 ata_dev_printk(dev, KERN_WARNING, "failed to read native "
1123 "max address (err_mask=0x%x)\n", err_mask);
1124 if (err_mask == AC_ERR_DEV && (tf.feature & ATA_ABORTED))
1130 *max_sectors = ata_tf_to_lba48(&tf);
1132 *max_sectors = ata_tf_to_lba(&tf);
1133 if (dev->horkage & ATA_HORKAGE_HPA_SIZE)
1139 * ata_set_max_sectors - Set max sectors
1140 * @dev: target device
1141 * @new_sectors: new max sectors value to set for the device
1143 * Set max sectors of @dev to @new_sectors.
1146 * 0 on success, -EACCES if command is aborted or denied (due to
1147 * previous non-volatile SET_MAX) by the drive. -EIO on other
1150 static int ata_set_max_sectors(struct ata_device *dev, u64 new_sectors)
1152 unsigned int err_mask;
1153 struct ata_taskfile tf;
1154 int lba48 = ata_id_has_lba48(dev->id);
1158 ata_tf_init(dev, &tf);
1160 tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
1163 tf.command = ATA_CMD_SET_MAX_EXT;
1164 tf.flags |= ATA_TFLAG_LBA48;
1166 tf.hob_lbal = (new_sectors >> 24) & 0xff;
1167 tf.hob_lbam = (new_sectors >> 32) & 0xff;
1168 tf.hob_lbah = (new_sectors >> 40) & 0xff;
1170 tf.command = ATA_CMD_SET_MAX;
1172 tf.device |= (new_sectors >> 24) & 0xf;
1175 tf.protocol |= ATA_PROT_NODATA;
1176 tf.device |= ATA_LBA;
1178 tf.lbal = (new_sectors >> 0) & 0xff;
1179 tf.lbam = (new_sectors >> 8) & 0xff;
1180 tf.lbah = (new_sectors >> 16) & 0xff;
1182 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
1184 ata_dev_printk(dev, KERN_WARNING, "failed to set "
1185 "max address (err_mask=0x%x)\n", err_mask);
1186 if (err_mask == AC_ERR_DEV &&
1187 (tf.feature & (ATA_ABORTED | ATA_IDNF)))
1196 * ata_hpa_resize - Resize a device with an HPA set
1197 * @dev: Device to resize
1199 * Read the size of an LBA28 or LBA48 disk with HPA features and resize
1200 * it if required to the full size of the media. The caller must check
1201 * the drive has the HPA feature set enabled.
1204 * 0 on success, -errno on failure.
1206 static int ata_hpa_resize(struct ata_device *dev)
1208 struct ata_eh_context *ehc = &dev->link->eh_context;
1209 int print_info = ehc->i.flags & ATA_EHI_PRINTINFO;
1210 u64 sectors = ata_id_n_sectors(dev->id);
1214 /* do we need to do it? */
1215 if (dev->class != ATA_DEV_ATA ||
1216 !ata_id_has_lba(dev->id) || !ata_id_hpa_enabled(dev->id) ||
1217 (dev->horkage & ATA_HORKAGE_BROKEN_HPA))
1220 /* read native max address */
1221 rc = ata_read_native_max_address(dev, &native_sectors);
1223 /* If HPA isn't going to be unlocked, skip HPA
1224 * resizing from the next try.
1226 if (!ata_ignore_hpa) {
1227 ata_dev_printk(dev, KERN_WARNING, "HPA support seems "
1228 "broken, will skip HPA handling\n");
1229 dev->horkage |= ATA_HORKAGE_BROKEN_HPA;
1231 /* we can continue if device aborted the command */
1239 /* nothing to do? */
1240 if (native_sectors <= sectors || !ata_ignore_hpa) {
1241 if (!print_info || native_sectors == sectors)
1244 if (native_sectors > sectors)
1245 ata_dev_printk(dev, KERN_INFO,
1246 "HPA detected: current %llu, native %llu\n",
1247 (unsigned long long)sectors,
1248 (unsigned long long)native_sectors);
1249 else if (native_sectors < sectors)
1250 ata_dev_printk(dev, KERN_WARNING,
1251 "native sectors (%llu) is smaller than "
1253 (unsigned long long)native_sectors,
1254 (unsigned long long)sectors);
1258 /* let's unlock HPA */
1259 rc = ata_set_max_sectors(dev, native_sectors);
1260 if (rc == -EACCES) {
1261 /* if device aborted the command, skip HPA resizing */
1262 ata_dev_printk(dev, KERN_WARNING, "device aborted resize "
1263 "(%llu -> %llu), skipping HPA handling\n",
1264 (unsigned long long)sectors,
1265 (unsigned long long)native_sectors);
1266 dev->horkage |= ATA_HORKAGE_BROKEN_HPA;
1271 /* re-read IDENTIFY data */
1272 rc = ata_dev_reread_id(dev, 0);
1274 ata_dev_printk(dev, KERN_ERR, "failed to re-read IDENTIFY "
1275 "data after HPA resizing\n");
1280 u64 new_sectors = ata_id_n_sectors(dev->id);
1281 ata_dev_printk(dev, KERN_INFO,
1282 "HPA unlocked: %llu -> %llu, native %llu\n",
1283 (unsigned long long)sectors,
1284 (unsigned long long)new_sectors,
1285 (unsigned long long)native_sectors);
1292 * ata_noop_dev_select - Select device 0/1 on ATA bus
1293 * @ap: ATA channel to manipulate
1294 * @device: ATA device (numbered from zero) to select
1296 * This function performs no actual function.
1298 * May be used as the dev_select() entry in ata_port_operations.
1303 void ata_noop_dev_select(struct ata_port *ap, unsigned int device)
1309 * ata_std_dev_select - Select device 0/1 on ATA bus
1310 * @ap: ATA channel to manipulate
1311 * @device: ATA device (numbered from zero) to select
1313 * Use the method defined in the ATA specification to
1314 * make either device 0, or device 1, active on the
1315 * ATA channel. Works with both PIO and MMIO.
1317 * May be used as the dev_select() entry in ata_port_operations.
1323 void ata_std_dev_select(struct ata_port *ap, unsigned int device)
1328 tmp = ATA_DEVICE_OBS;
1330 tmp = ATA_DEVICE_OBS | ATA_DEV1;
1332 iowrite8(tmp, ap->ioaddr.device_addr);
1333 ata_pause(ap); /* needed; also flushes, for mmio */
1337 * ata_dev_select - Select device 0/1 on ATA bus
1338 * @ap: ATA channel to manipulate
1339 * @device: ATA device (numbered from zero) to select
1340 * @wait: non-zero to wait for Status register BSY bit to clear
1341 * @can_sleep: non-zero if context allows sleeping
1343 * Use the method defined in the ATA specification to
1344 * make either device 0, or device 1, active on the
1347 * This is a high-level version of ata_std_dev_select(),
1348 * which additionally provides the services of inserting
1349 * the proper pauses and status polling, where needed.
1355 void ata_dev_select(struct ata_port *ap, unsigned int device,
1356 unsigned int wait, unsigned int can_sleep)
1358 if (ata_msg_probe(ap))
1359 ata_port_printk(ap, KERN_INFO, "ata_dev_select: ENTER, "
1360 "device %u, wait %u\n", device, wait);
1365 ap->ops->dev_select(ap, device);
1368 if (can_sleep && ap->link.device[device].class == ATA_DEV_ATAPI)
1375 * ata_dump_id - IDENTIFY DEVICE info debugging output
1376 * @id: IDENTIFY DEVICE page to dump
1378 * Dump selected 16-bit words from the given IDENTIFY DEVICE
1385 static inline void ata_dump_id(const u16 *id)
1387 DPRINTK("49==0x%04x "
1397 DPRINTK("80==0x%04x "
1407 DPRINTK("88==0x%04x "
1414 * ata_id_xfermask - Compute xfermask from the given IDENTIFY data
1415 * @id: IDENTIFY data to compute xfer mask from
1417 * Compute the xfermask for this device. This is not as trivial
1418 * as it seems if we must consider early devices correctly.
1420 * FIXME: pre IDE drive timing (do we care ?).
1428 unsigned long ata_id_xfermask(const u16 *id)
1430 unsigned long pio_mask, mwdma_mask, udma_mask;
1432 /* Usual case. Word 53 indicates word 64 is valid */
1433 if (id[ATA_ID_FIELD_VALID] & (1 << 1)) {
1434 pio_mask = id[ATA_ID_PIO_MODES] & 0x03;
1438 /* If word 64 isn't valid then Word 51 high byte holds
1439 * the PIO timing number for the maximum. Turn it into
1442 u8 mode = (id[ATA_ID_OLD_PIO_MODES] >> 8) & 0xFF;
1443 if (mode < 5) /* Valid PIO range */
1444 pio_mask = (2 << mode) - 1;
1448 /* But wait.. there's more. Design your standards by
1449 * committee and you too can get a free iordy field to
1450 * process. However its the speeds not the modes that
1451 * are supported... Note drivers using the timing API
1452 * will get this right anyway
1456 mwdma_mask = id[ATA_ID_MWDMA_MODES] & 0x07;
1458 if (ata_id_is_cfa(id)) {
1460 * Process compact flash extended modes
1462 int pio = id[163] & 0x7;
1463 int dma = (id[163] >> 3) & 7;
1466 pio_mask |= (1 << 5);
1468 pio_mask |= (1 << 6);
1470 mwdma_mask |= (1 << 3);
1472 mwdma_mask |= (1 << 4);
1476 if (id[ATA_ID_FIELD_VALID] & (1 << 2))
1477 udma_mask = id[ATA_ID_UDMA_MODES] & 0xff;
1479 return ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask);
1483 * ata_pio_queue_task - Queue port_task
1484 * @ap: The ata_port to queue port_task for
1485 * @fn: workqueue function to be scheduled
1486 * @data: data for @fn to use
1487 * @delay: delay time for workqueue function
1489 * Schedule @fn(@data) for execution after @delay jiffies using
1490 * port_task. There is one port_task per port and it's the
1491 * user(low level driver)'s responsibility to make sure that only
1492 * one task is active at any given time.
1494 * libata core layer takes care of synchronization between
1495 * port_task and EH. ata_pio_queue_task() may be ignored for EH
1499 * Inherited from caller.
1501 static void ata_pio_queue_task(struct ata_port *ap, void *data,
1502 unsigned long delay)
1504 ap->port_task_data = data;
1506 /* may fail if ata_port_flush_task() in progress */
1507 queue_delayed_work(ata_wq, &ap->port_task, delay);
1511 * ata_port_flush_task - Flush port_task
1512 * @ap: The ata_port to flush port_task for
1514 * After this function completes, port_task is guranteed not to
1515 * be running or scheduled.
1518 * Kernel thread context (may sleep)
1520 void ata_port_flush_task(struct ata_port *ap)
1524 cancel_rearming_delayed_work(&ap->port_task);
1526 if (ata_msg_ctl(ap))
1527 ata_port_printk(ap, KERN_DEBUG, "%s: EXIT\n", __FUNCTION__);
1530 static void ata_qc_complete_internal(struct ata_queued_cmd *qc)
1532 struct completion *waiting = qc->private_data;
1538 * ata_exec_internal_sg - execute libata internal command
1539 * @dev: Device to which the command is sent
1540 * @tf: Taskfile registers for the command and the result
1541 * @cdb: CDB for packet command
1542 * @dma_dir: Data tranfer direction of the command
1543 * @sgl: sg list for the data buffer of the command
1544 * @n_elem: Number of sg entries
1545 * @timeout: Timeout in msecs (0 for default)
1547 * Executes libata internal command with timeout. @tf contains
1548 * command on entry and result on return. Timeout and error
1549 * conditions are reported via return value. No recovery action
1550 * is taken after a command times out. It's caller's duty to
1551 * clean up after timeout.
1554 * None. Should be called with kernel context, might sleep.
1557 * Zero on success, AC_ERR_* mask on failure
1559 unsigned ata_exec_internal_sg(struct ata_device *dev,
1560 struct ata_taskfile *tf, const u8 *cdb,
1561 int dma_dir, struct scatterlist *sgl,
1562 unsigned int n_elem, unsigned long timeout)
1564 struct ata_link *link = dev->link;
1565 struct ata_port *ap = link->ap;
1566 u8 command = tf->command;
1567 struct ata_queued_cmd *qc;
1568 unsigned int tag, preempted_tag;
1569 u32 preempted_sactive, preempted_qc_active;
1570 int preempted_nr_active_links;
1571 DECLARE_COMPLETION_ONSTACK(wait);
1572 unsigned long flags;
1573 unsigned int err_mask;
1576 spin_lock_irqsave(ap->lock, flags);
1578 /* no internal command while frozen */
1579 if (ap->pflags & ATA_PFLAG_FROZEN) {
1580 spin_unlock_irqrestore(ap->lock, flags);
1581 return AC_ERR_SYSTEM;
1584 /* initialize internal qc */
1586 /* XXX: Tag 0 is used for drivers with legacy EH as some
1587 * drivers choke if any other tag is given. This breaks
1588 * ata_tag_internal() test for those drivers. Don't use new
1589 * EH stuff without converting to it.
1591 if (ap->ops->error_handler)
1592 tag = ATA_TAG_INTERNAL;
1596 if (test_and_set_bit(tag, &ap->qc_allocated))
1598 qc = __ata_qc_from_tag(ap, tag);
1606 preempted_tag = link->active_tag;
1607 preempted_sactive = link->sactive;
1608 preempted_qc_active = ap->qc_active;
1609 preempted_nr_active_links = ap->nr_active_links;
1610 link->active_tag = ATA_TAG_POISON;
1613 ap->nr_active_links = 0;
1615 /* prepare & issue qc */
1618 memcpy(qc->cdb, cdb, ATAPI_CDB_LEN);
1619 qc->flags |= ATA_QCFLAG_RESULT_TF;
1620 qc->dma_dir = dma_dir;
1621 if (dma_dir != DMA_NONE) {
1622 unsigned int i, buflen = 0;
1623 struct scatterlist *sg;
1625 for_each_sg(sgl, sg, n_elem, i)
1626 buflen += sg->length;
1628 ata_sg_init(qc, sgl, n_elem);
1629 qc->nbytes = buflen;
1632 qc->private_data = &wait;
1633 qc->complete_fn = ata_qc_complete_internal;
1637 spin_unlock_irqrestore(ap->lock, flags);
1640 timeout = ata_probe_timeout * 1000 / HZ;
1642 rc = wait_for_completion_timeout(&wait, msecs_to_jiffies(timeout));
1644 ata_port_flush_task(ap);
1647 spin_lock_irqsave(ap->lock, flags);
1649 /* We're racing with irq here. If we lose, the
1650 * following test prevents us from completing the qc
1651 * twice. If we win, the port is frozen and will be
1652 * cleaned up by ->post_internal_cmd().
1654 if (qc->flags & ATA_QCFLAG_ACTIVE) {
1655 qc->err_mask |= AC_ERR_TIMEOUT;
1657 if (ap->ops->error_handler)
1658 ata_port_freeze(ap);
1660 ata_qc_complete(qc);
1662 if (ata_msg_warn(ap))
1663 ata_dev_printk(dev, KERN_WARNING,
1664 "qc timeout (cmd 0x%x)\n", command);
1667 spin_unlock_irqrestore(ap->lock, flags);
1670 /* do post_internal_cmd */
1671 if (ap->ops->post_internal_cmd)
1672 ap->ops->post_internal_cmd(qc);
1674 /* perform minimal error analysis */
1675 if (qc->flags & ATA_QCFLAG_FAILED) {
1676 if (qc->result_tf.command & (ATA_ERR | ATA_DF))
1677 qc->err_mask |= AC_ERR_DEV;
1680 qc->err_mask |= AC_ERR_OTHER;
1682 if (qc->err_mask & ~AC_ERR_OTHER)
1683 qc->err_mask &= ~AC_ERR_OTHER;
1687 spin_lock_irqsave(ap->lock, flags);
1689 *tf = qc->result_tf;
1690 err_mask = qc->err_mask;
1693 link->active_tag = preempted_tag;
1694 link->sactive = preempted_sactive;
1695 ap->qc_active = preempted_qc_active;
1696 ap->nr_active_links = preempted_nr_active_links;
1698 /* XXX - Some LLDDs (sata_mv) disable port on command failure.
1699 * Until those drivers are fixed, we detect the condition
1700 * here, fail the command with AC_ERR_SYSTEM and reenable the
1703 * Note that this doesn't change any behavior as internal
1704 * command failure results in disabling the device in the
1705 * higher layer for LLDDs without new reset/EH callbacks.
1707 * Kill the following code as soon as those drivers are fixed.
1709 if (ap->flags & ATA_FLAG_DISABLED) {
1710 err_mask |= AC_ERR_SYSTEM;
1714 spin_unlock_irqrestore(ap->lock, flags);
1720 * ata_exec_internal - execute libata internal command
1721 * @dev: Device to which the command is sent
1722 * @tf: Taskfile registers for the command and the result
1723 * @cdb: CDB for packet command
1724 * @dma_dir: Data tranfer direction of the command
1725 * @buf: Data buffer of the command
1726 * @buflen: Length of data buffer
1727 * @timeout: Timeout in msecs (0 for default)
1729 * Wrapper around ata_exec_internal_sg() which takes simple
1730 * buffer instead of sg list.
1733 * None. Should be called with kernel context, might sleep.
1736 * Zero on success, AC_ERR_* mask on failure
1738 unsigned ata_exec_internal(struct ata_device *dev,
1739 struct ata_taskfile *tf, const u8 *cdb,
1740 int dma_dir, void *buf, unsigned int buflen,
1741 unsigned long timeout)
1743 struct scatterlist *psg = NULL, sg;
1744 unsigned int n_elem = 0;
1746 if (dma_dir != DMA_NONE) {
1748 sg_init_one(&sg, buf, buflen);
1753 return ata_exec_internal_sg(dev, tf, cdb, dma_dir, psg, n_elem,
1758 * ata_do_simple_cmd - execute simple internal command
1759 * @dev: Device to which the command is sent
1760 * @cmd: Opcode to execute
1762 * Execute a 'simple' command, that only consists of the opcode
1763 * 'cmd' itself, without filling any other registers
1766 * Kernel thread context (may sleep).
1769 * Zero on success, AC_ERR_* mask on failure
1771 unsigned int ata_do_simple_cmd(struct ata_device *dev, u8 cmd)
1773 struct ata_taskfile tf;
1775 ata_tf_init(dev, &tf);
1778 tf.flags |= ATA_TFLAG_DEVICE;
1779 tf.protocol = ATA_PROT_NODATA;
1781 return ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
1785 * ata_pio_need_iordy - check if iordy needed
1788 * Check if the current speed of the device requires IORDY. Used
1789 * by various controllers for chip configuration.
1792 unsigned int ata_pio_need_iordy(const struct ata_device *adev)
1794 /* Controller doesn't support IORDY. Probably a pointless check
1795 as the caller should know this */
1796 if (adev->link->ap->flags & ATA_FLAG_NO_IORDY)
1798 /* PIO3 and higher it is mandatory */
1799 if (adev->pio_mode > XFER_PIO_2)
1801 /* We turn it on when possible */
1802 if (ata_id_has_iordy(adev->id))
1808 * ata_pio_mask_no_iordy - Return the non IORDY mask
1811 * Compute the highest mode possible if we are not using iordy. Return
1812 * -1 if no iordy mode is available.
1815 static u32 ata_pio_mask_no_iordy(const struct ata_device *adev)
1817 /* If we have no drive specific rule, then PIO 2 is non IORDY */
1818 if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE */
1819 u16 pio = adev->id[ATA_ID_EIDE_PIO];
1820 /* Is the speed faster than the drive allows non IORDY ? */
1822 /* This is cycle times not frequency - watch the logic! */
1823 if (pio > 240) /* PIO2 is 240nS per cycle */
1824 return 3 << ATA_SHIFT_PIO;
1825 return 7 << ATA_SHIFT_PIO;
1828 return 3 << ATA_SHIFT_PIO;
1832 * ata_dev_read_id - Read ID data from the specified device
1833 * @dev: target device
1834 * @p_class: pointer to class of the target device (may be changed)
1835 * @flags: ATA_READID_* flags
1836 * @id: buffer to read IDENTIFY data into
1838 * Read ID data from the specified device. ATA_CMD_ID_ATA is
1839 * performed on ATA devices and ATA_CMD_ID_ATAPI on ATAPI
1840 * devices. This function also issues ATA_CMD_INIT_DEV_PARAMS
1841 * for pre-ATA4 drives.
1843 * FIXME: ATA_CMD_ID_ATA is optional for early drives and right
1844 * now we abort if we hit that case.
1847 * Kernel thread context (may sleep)
1850 * 0 on success, -errno otherwise.
1852 int ata_dev_read_id(struct ata_device *dev, unsigned int *p_class,
1853 unsigned int flags, u16 *id)
1855 struct ata_port *ap = dev->link->ap;
1856 unsigned int class = *p_class;
1857 struct ata_taskfile tf;
1858 unsigned int err_mask = 0;
1860 int may_fallback = 1, tried_spinup = 0;
1863 if (ata_msg_ctl(ap))
1864 ata_dev_printk(dev, KERN_DEBUG, "%s: ENTER\n", __FUNCTION__);
1866 ata_dev_select(ap, dev->devno, 1, 1); /* select device 0/1 */
1868 ata_tf_init(dev, &tf);
1872 tf.command = ATA_CMD_ID_ATA;
1875 tf.command = ATA_CMD_ID_ATAPI;
1879 reason = "unsupported class";
1883 tf.protocol = ATA_PROT_PIO;
1885 /* Some devices choke if TF registers contain garbage. Make
1886 * sure those are properly initialized.
1888 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
1890 /* Device presence detection is unreliable on some
1891 * controllers. Always poll IDENTIFY if available.
1893 tf.flags |= ATA_TFLAG_POLLING;
1895 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_FROM_DEVICE,
1896 id, sizeof(id[0]) * ATA_ID_WORDS, 0);
1898 if (err_mask & AC_ERR_NODEV_HINT) {
1899 DPRINTK("ata%u.%d: NODEV after polling detection\n",
1900 ap->print_id, dev->devno);
1904 /* Device or controller might have reported the wrong
1905 * device class. Give a shot at the other IDENTIFY if
1906 * the current one is aborted by the device.
1909 (err_mask == AC_ERR_DEV) && (tf.feature & ATA_ABORTED)) {
1912 if (class == ATA_DEV_ATA)
1913 class = ATA_DEV_ATAPI;
1915 class = ATA_DEV_ATA;
1920 reason = "I/O error";
1924 /* Falling back doesn't make sense if ID data was read
1925 * successfully at least once.
1929 swap_buf_le16(id, ATA_ID_WORDS);
1933 reason = "device reports invalid type";
1935 if (class == ATA_DEV_ATA) {
1936 if (!ata_id_is_ata(id) && !ata_id_is_cfa(id))
1939 if (ata_id_is_ata(id))
1943 if (!tried_spinup && (id[2] == 0x37c8 || id[2] == 0x738c)) {
1946 * Drive powered-up in standby mode, and requires a specific
1947 * SET_FEATURES spin-up subcommand before it will accept
1948 * anything other than the original IDENTIFY command.
1950 err_mask = ata_dev_set_feature(dev, SETFEATURES_SPINUP, 0);
1951 if (err_mask && id[2] != 0x738c) {
1953 reason = "SPINUP failed";
1957 * If the drive initially returned incomplete IDENTIFY info,
1958 * we now must reissue the IDENTIFY command.
1960 if (id[2] == 0x37c8)
1964 if ((flags & ATA_READID_POSTRESET) && class == ATA_DEV_ATA) {
1966 * The exact sequence expected by certain pre-ATA4 drives is:
1968 * IDENTIFY (optional in early ATA)
1969 * INITIALIZE DEVICE PARAMETERS (later IDE and ATA)
1971 * Some drives were very specific about that exact sequence.
1973 * Note that ATA4 says lba is mandatory so the second check
1974 * shoud never trigger.
1976 if (ata_id_major_version(id) < 4 || !ata_id_has_lba(id)) {
1977 err_mask = ata_dev_init_params(dev, id[3], id[6]);
1980 reason = "INIT_DEV_PARAMS failed";
1984 /* current CHS translation info (id[53-58]) might be
1985 * changed. reread the identify device info.
1987 flags &= ~ATA_READID_POSTRESET;
1997 if (ata_msg_warn(ap))
1998 ata_dev_printk(dev, KERN_WARNING, "failed to IDENTIFY "
1999 "(%s, err_mask=0x%x)\n", reason, err_mask);
2003 static inline u8 ata_dev_knobble(struct ata_device *dev)
2005 struct ata_port *ap = dev->link->ap;
2006 return ((ap->cbl == ATA_CBL_SATA) && (!ata_id_is_sata(dev->id)));
2009 static void ata_dev_config_ncq(struct ata_device *dev,
2010 char *desc, size_t desc_sz)
2012 struct ata_port *ap = dev->link->ap;
2013 int hdepth = 0, ddepth = ata_id_queue_depth(dev->id);
2015 if (!ata_id_has_ncq(dev->id)) {
2019 if (dev->horkage & ATA_HORKAGE_NONCQ) {
2020 snprintf(desc, desc_sz, "NCQ (not used)");
2023 if (ap->flags & ATA_FLAG_NCQ) {
2024 hdepth = min(ap->scsi_host->can_queue, ATA_MAX_QUEUE - 1);
2025 dev->flags |= ATA_DFLAG_NCQ;
2028 if (hdepth >= ddepth)
2029 snprintf(desc, desc_sz, "NCQ (depth %d)", ddepth);
2031 snprintf(desc, desc_sz, "NCQ (depth %d/%d)", hdepth, ddepth);
2035 * ata_dev_configure - Configure the specified ATA/ATAPI device
2036 * @dev: Target device to configure
2038 * Configure @dev according to @dev->id. Generic and low-level
2039 * driver specific fixups are also applied.
2042 * Kernel thread context (may sleep)
2045 * 0 on success, -errno otherwise
2047 int ata_dev_configure(struct ata_device *dev)
2049 struct ata_port *ap = dev->link->ap;
2050 struct ata_eh_context *ehc = &dev->link->eh_context;
2051 int print_info = ehc->i.flags & ATA_EHI_PRINTINFO;
2052 const u16 *id = dev->id;
2053 unsigned long xfer_mask;
2054 char revbuf[7]; /* XYZ-99\0 */
2055 char fwrevbuf[ATA_ID_FW_REV_LEN+1];
2056 char modelbuf[ATA_ID_PROD_LEN+1];
2059 if (!ata_dev_enabled(dev) && ata_msg_info(ap)) {
2060 ata_dev_printk(dev, KERN_INFO, "%s: ENTER/EXIT -- nodev\n",
2065 if (ata_msg_probe(ap))
2066 ata_dev_printk(dev, KERN_DEBUG, "%s: ENTER\n", __FUNCTION__);
2069 dev->horkage |= ata_dev_blacklisted(dev);
2071 /* let ACPI work its magic */
2072 rc = ata_acpi_on_devcfg(dev);
2076 /* massage HPA, do it early as it might change IDENTIFY data */
2077 rc = ata_hpa_resize(dev);
2081 /* print device capabilities */
2082 if (ata_msg_probe(ap))
2083 ata_dev_printk(dev, KERN_DEBUG,
2084 "%s: cfg 49:%04x 82:%04x 83:%04x 84:%04x "
2085 "85:%04x 86:%04x 87:%04x 88:%04x\n",
2087 id[49], id[82], id[83], id[84],
2088 id[85], id[86], id[87], id[88]);
2090 /* initialize to-be-configured parameters */
2091 dev->flags &= ~ATA_DFLAG_CFG_MASK;
2092 dev->max_sectors = 0;
2100 * common ATA, ATAPI feature tests
2103 /* find max transfer mode; for printk only */
2104 xfer_mask = ata_id_xfermask(id);
2106 if (ata_msg_probe(ap))
2109 /* SCSI only uses 4-char revisions, dump full 8 chars from ATA */
2110 ata_id_c_string(dev->id, fwrevbuf, ATA_ID_FW_REV,
2113 ata_id_c_string(dev->id, modelbuf, ATA_ID_PROD,
2116 /* ATA-specific feature tests */
2117 if (dev->class == ATA_DEV_ATA) {
2118 if (ata_id_is_cfa(id)) {
2119 if (id[162] & 1) /* CPRM may make this media unusable */
2120 ata_dev_printk(dev, KERN_WARNING,
2121 "supports DRM functions and may "
2122 "not be fully accessable.\n");
2123 snprintf(revbuf, 7, "CFA");
2125 snprintf(revbuf, 7, "ATA-%d", ata_id_major_version(id));
2126 /* Warn the user if the device has TPM extensions */
2127 if (ata_id_has_tpm(id))
2128 ata_dev_printk(dev, KERN_WARNING,
2129 "supports DRM functions and may "
2130 "not be fully accessable.\n");
2133 dev->n_sectors = ata_id_n_sectors(id);
2135 if (dev->id[59] & 0x100)
2136 dev->multi_count = dev->id[59] & 0xff;
2138 if (ata_id_has_lba(id)) {
2139 const char *lba_desc;
2143 dev->flags |= ATA_DFLAG_LBA;
2144 if (ata_id_has_lba48(id)) {
2145 dev->flags |= ATA_DFLAG_LBA48;
2148 if (dev->n_sectors >= (1UL << 28) &&
2149 ata_id_has_flush_ext(id))
2150 dev->flags |= ATA_DFLAG_FLUSH_EXT;
2154 ata_dev_config_ncq(dev, ncq_desc, sizeof(ncq_desc));
2156 /* print device info to dmesg */
2157 if (ata_msg_drv(ap) && print_info) {
2158 ata_dev_printk(dev, KERN_INFO,
2159 "%s: %s, %s, max %s\n",
2160 revbuf, modelbuf, fwrevbuf,
2161 ata_mode_string(xfer_mask));
2162 ata_dev_printk(dev, KERN_INFO,
2163 "%Lu sectors, multi %u: %s %s\n",
2164 (unsigned long long)dev->n_sectors,
2165 dev->multi_count, lba_desc, ncq_desc);
2170 /* Default translation */
2171 dev->cylinders = id[1];
2173 dev->sectors = id[6];
2175 if (ata_id_current_chs_valid(id)) {
2176 /* Current CHS translation is valid. */
2177 dev->cylinders = id[54];
2178 dev->heads = id[55];
2179 dev->sectors = id[56];
2182 /* print device info to dmesg */
2183 if (ata_msg_drv(ap) && print_info) {
2184 ata_dev_printk(dev, KERN_INFO,
2185 "%s: %s, %s, max %s\n",
2186 revbuf, modelbuf, fwrevbuf,
2187 ata_mode_string(xfer_mask));
2188 ata_dev_printk(dev, KERN_INFO,
2189 "%Lu sectors, multi %u, CHS %u/%u/%u\n",
2190 (unsigned long long)dev->n_sectors,
2191 dev->multi_count, dev->cylinders,
2192 dev->heads, dev->sectors);
2199 /* ATAPI-specific feature tests */
2200 else if (dev->class == ATA_DEV_ATAPI) {
2201 const char *cdb_intr_string = "";
2202 const char *atapi_an_string = "";
2205 rc = atapi_cdb_len(id);
2206 if ((rc < 12) || (rc > ATAPI_CDB_LEN)) {
2207 if (ata_msg_warn(ap))
2208 ata_dev_printk(dev, KERN_WARNING,
2209 "unsupported CDB len\n");
2213 dev->cdb_len = (unsigned int) rc;
2215 /* Enable ATAPI AN if both the host and device have
2216 * the support. If PMP is attached, SNTF is required
2217 * to enable ATAPI AN to discern between PHY status
2218 * changed notifications and ATAPI ANs.
2220 if ((ap->flags & ATA_FLAG_AN) && ata_id_has_atapi_AN(id) &&
2221 (!ap->nr_pmp_links ||
2222 sata_scr_read(&ap->link, SCR_NOTIFICATION, &sntf) == 0)) {
2223 unsigned int err_mask;
2225 /* issue SET feature command to turn this on */
2226 err_mask = ata_dev_set_feature(dev,
2227 SETFEATURES_SATA_ENABLE, SATA_AN);
2229 ata_dev_printk(dev, KERN_ERR,
2230 "failed to enable ATAPI AN "
2231 "(err_mask=0x%x)\n", err_mask);
2233 dev->flags |= ATA_DFLAG_AN;
2234 atapi_an_string = ", ATAPI AN";
2238 if (ata_id_cdb_intr(dev->id)) {
2239 dev->flags |= ATA_DFLAG_CDB_INTR;
2240 cdb_intr_string = ", CDB intr";
2243 /* print device info to dmesg */
2244 if (ata_msg_drv(ap) && print_info)
2245 ata_dev_printk(dev, KERN_INFO,
2246 "ATAPI: %s, %s, max %s%s%s\n",
2248 ata_mode_string(xfer_mask),
2249 cdb_intr_string, atapi_an_string);
2252 /* determine max_sectors */
2253 dev->max_sectors = ATA_MAX_SECTORS;
2254 if (dev->flags & ATA_DFLAG_LBA48)
2255 dev->max_sectors = ATA_MAX_SECTORS_LBA48;
2257 if (!(dev->horkage & ATA_HORKAGE_IPM)) {
2258 if (ata_id_has_hipm(dev->id))
2259 dev->flags |= ATA_DFLAG_HIPM;
2260 if (ata_id_has_dipm(dev->id))
2261 dev->flags |= ATA_DFLAG_DIPM;
2264 /* Limit PATA drive on SATA cable bridge transfers to udma5,
2266 if (ata_dev_knobble(dev)) {
2267 if (ata_msg_drv(ap) && print_info)
2268 ata_dev_printk(dev, KERN_INFO,
2269 "applying bridge limits\n");
2270 dev->udma_mask &= ATA_UDMA5;
2271 dev->max_sectors = ATA_MAX_SECTORS;
2274 if ((dev->class == ATA_DEV_ATAPI) &&
2275 (atapi_command_packet_set(id) == TYPE_TAPE)) {
2276 dev->max_sectors = ATA_MAX_SECTORS_TAPE;
2277 dev->horkage |= ATA_HORKAGE_STUCK_ERR;
2280 if (dev->horkage & ATA_HORKAGE_MAX_SEC_128)
2281 dev->max_sectors = min_t(unsigned int, ATA_MAX_SECTORS_128,
2284 if (ata_dev_blacklisted(dev) & ATA_HORKAGE_IPM) {
2285 dev->horkage |= ATA_HORKAGE_IPM;
2287 /* reset link pm_policy for this port to no pm */
2288 ap->pm_policy = MAX_PERFORMANCE;
2291 if (ap->ops->dev_config)
2292 ap->ops->dev_config(dev);
2294 if (dev->horkage & ATA_HORKAGE_DIAGNOSTIC) {
2295 /* Let the user know. We don't want to disallow opens for
2296 rescue purposes, or in case the vendor is just a blithering
2297 idiot. Do this after the dev_config call as some controllers
2298 with buggy firmware may want to avoid reporting false device
2302 ata_dev_printk(dev, KERN_WARNING,
2303 "Drive reports diagnostics failure. This may indicate a drive\n");
2304 ata_dev_printk(dev, KERN_WARNING,
2305 "fault or invalid emulation. Contact drive vendor for information.\n");
2309 if (ata_msg_probe(ap))
2310 ata_dev_printk(dev, KERN_DEBUG, "%s: EXIT, drv_stat = 0x%x\n",
2311 __FUNCTION__, ata_chk_status(ap));
2315 if (ata_msg_probe(ap))
2316 ata_dev_printk(dev, KERN_DEBUG,
2317 "%s: EXIT, err\n", __FUNCTION__);
2322 * ata_cable_40wire - return 40 wire cable type
2325 * Helper method for drivers which want to hardwire 40 wire cable
2329 int ata_cable_40wire(struct ata_port *ap)
2331 return ATA_CBL_PATA40;
2335 * ata_cable_80wire - return 80 wire cable type
2338 * Helper method for drivers which want to hardwire 80 wire cable
2342 int ata_cable_80wire(struct ata_port *ap)
2344 return ATA_CBL_PATA80;
2348 * ata_cable_unknown - return unknown PATA cable.
2351 * Helper method for drivers which have no PATA cable detection.
2354 int ata_cable_unknown(struct ata_port *ap)
2356 return ATA_CBL_PATA_UNK;
2360 * ata_cable_ignore - return ignored PATA cable.
2363 * Helper method for drivers which don't use cable type to limit
2366 int ata_cable_ignore(struct ata_port *ap)
2368 return ATA_CBL_PATA_IGN;
2372 * ata_cable_sata - return SATA cable type
2375 * Helper method for drivers which have SATA cables
2378 int ata_cable_sata(struct ata_port *ap)
2380 return ATA_CBL_SATA;
2384 * ata_bus_probe - Reset and probe ATA bus
2387 * Master ATA bus probing function. Initiates a hardware-dependent
2388 * bus reset, then attempts to identify any devices found on
2392 * PCI/etc. bus probe sem.
2395 * Zero on success, negative errno otherwise.
2398 int ata_bus_probe(struct ata_port *ap)
2400 unsigned int classes[ATA_MAX_DEVICES];
2401 int tries[ATA_MAX_DEVICES];
2403 struct ata_device *dev;
2407 ata_link_for_each_dev(dev, &ap->link)
2408 tries[dev->devno] = ATA_PROBE_MAX_TRIES;
2411 ata_link_for_each_dev(dev, &ap->link) {
2412 /* If we issue an SRST then an ATA drive (not ATAPI)
2413 * may change configuration and be in PIO0 timing. If
2414 * we do a hard reset (or are coming from power on)
2415 * this is true for ATA or ATAPI. Until we've set a
2416 * suitable controller mode we should not touch the
2417 * bus as we may be talking too fast.
2419 dev->pio_mode = XFER_PIO_0;
2421 /* If the controller has a pio mode setup function
2422 * then use it to set the chipset to rights. Don't
2423 * touch the DMA setup as that will be dealt with when
2424 * configuring devices.
2426 if (ap->ops->set_piomode)
2427 ap->ops->set_piomode(ap, dev);
2430 /* reset and determine device classes */
2431 ap->ops->phy_reset(ap);
2433 ata_link_for_each_dev(dev, &ap->link) {
2434 if (!(ap->flags & ATA_FLAG_DISABLED) &&
2435 dev->class != ATA_DEV_UNKNOWN)
2436 classes[dev->devno] = dev->class;
2438 classes[dev->devno] = ATA_DEV_NONE;
2440 dev->class = ATA_DEV_UNKNOWN;
2445 /* read IDENTIFY page and configure devices. We have to do the identify
2446 specific sequence bass-ackwards so that PDIAG- is released by
2449 ata_link_for_each_dev(dev, &ap->link) {
2450 if (tries[dev->devno])
2451 dev->class = classes[dev->devno];
2453 if (!ata_dev_enabled(dev))
2456 rc = ata_dev_read_id(dev, &dev->class, ATA_READID_POSTRESET,
2462 /* Now ask for the cable type as PDIAG- should have been released */
2463 if (ap->ops->cable_detect)
2464 ap->cbl = ap->ops->cable_detect(ap);
2466 /* We may have SATA bridge glue hiding here irrespective of the
2467 reported cable types and sensed types */
2468 ata_link_for_each_dev(dev, &ap->link) {
2469 if (!ata_dev_enabled(dev))
2471 /* SATA drives indicate we have a bridge. We don't know which
2472 end of the link the bridge is which is a problem */
2473 if (ata_id_is_sata(dev->id))
2474 ap->cbl = ATA_CBL_SATA;
2477 /* After the identify sequence we can now set up the devices. We do
2478 this in the normal order so that the user doesn't get confused */
2480 ata_link_for_each_dev(dev, &ap->link) {
2481 if (!ata_dev_enabled(dev))
2484 ap->link.eh_context.i.flags |= ATA_EHI_PRINTINFO;
2485 rc = ata_dev_configure(dev);
2486 ap->link.eh_context.i.flags &= ~ATA_EHI_PRINTINFO;
2491 /* configure transfer mode */
2492 rc = ata_set_mode(&ap->link, &dev);
2496 ata_link_for_each_dev(dev, &ap->link)
2497 if (ata_dev_enabled(dev))
2500 /* no device present, disable port */
2501 ata_port_disable(ap);
2505 tries[dev->devno]--;
2509 /* eeek, something went very wrong, give up */
2510 tries[dev->devno] = 0;
2514 /* give it just one more chance */
2515 tries[dev->devno] = min(tries[dev->devno], 1);
2517 if (tries[dev->devno] == 1) {
2518 /* This is the last chance, better to slow
2519 * down than lose it.
2521 sata_down_spd_limit(&ap->link);
2522 ata_down_xfermask_limit(dev, ATA_DNXFER_PIO);
2526 if (!tries[dev->devno])
2527 ata_dev_disable(dev);
2533 * ata_port_probe - Mark port as enabled
2534 * @ap: Port for which we indicate enablement
2536 * Modify @ap data structure such that the system
2537 * thinks that the entire port is enabled.
2539 * LOCKING: host lock, or some other form of
2543 void ata_port_probe(struct ata_port *ap)
2545 ap->flags &= ~ATA_FLAG_DISABLED;
2549 * sata_print_link_status - Print SATA link status
2550 * @link: SATA link to printk link status about
2552 * This function prints link speed and status of a SATA link.
2557 void sata_print_link_status(struct ata_link *link)
2559 u32 sstatus, scontrol, tmp;
2561 if (sata_scr_read(link, SCR_STATUS, &sstatus))
2563 sata_scr_read(link, SCR_CONTROL, &scontrol);
2565 if (ata_link_online(link)) {
2566 tmp = (sstatus >> 4) & 0xf;
2567 ata_link_printk(link, KERN_INFO,
2568 "SATA link up %s (SStatus %X SControl %X)\n",
2569 sata_spd_string(tmp), sstatus, scontrol);
2571 ata_link_printk(link, KERN_INFO,
2572 "SATA link down (SStatus %X SControl %X)\n",
2578 * ata_dev_pair - return other device on cable
2581 * Obtain the other device on the same cable, or if none is
2582 * present NULL is returned
2585 struct ata_device *ata_dev_pair(struct ata_device *adev)
2587 struct ata_link *link = adev->link;
2588 struct ata_device *pair = &link->device[1 - adev->devno];
2589 if (!ata_dev_enabled(pair))
2595 * ata_port_disable - Disable port.
2596 * @ap: Port to be disabled.
2598 * Modify @ap data structure such that the system
2599 * thinks that the entire port is disabled, and should
2600 * never attempt to probe or communicate with devices
2603 * LOCKING: host lock, or some other form of
2607 void ata_port_disable(struct ata_port *ap)
2609 ap->link.device[0].class = ATA_DEV_NONE;
2610 ap->link.device[1].class = ATA_DEV_NONE;
2611 ap->flags |= ATA_FLAG_DISABLED;
2615 * sata_down_spd_limit - adjust SATA spd limit downward
2616 * @link: Link to adjust SATA spd limit for
2618 * Adjust SATA spd limit of @link downward. Note that this
2619 * function only adjusts the limit. The change must be applied
2620 * using sata_set_spd().
2623 * Inherited from caller.
2626 * 0 on success, negative errno on failure
2628 int sata_down_spd_limit(struct ata_link *link)
2630 u32 sstatus, spd, mask;
2633 if (!sata_scr_valid(link))
2636 /* If SCR can be read, use it to determine the current SPD.
2637 * If not, use cached value in link->sata_spd.
2639 rc = sata_scr_read(link, SCR_STATUS, &sstatus);
2641 spd = (sstatus >> 4) & 0xf;
2643 spd = link->sata_spd;
2645 mask = link->sata_spd_limit;
2649 /* unconditionally mask off the highest bit */
2650 highbit = fls(mask) - 1;
2651 mask &= ~(1 << highbit);
2653 /* Mask off all speeds higher than or equal to the current
2654 * one. Force 1.5Gbps if current SPD is not available.
2657 mask &= (1 << (spd - 1)) - 1;
2661 /* were we already at the bottom? */
2665 link->sata_spd_limit = mask;
2667 ata_link_printk(link, KERN_WARNING, "limiting SATA link speed to %s\n",
2668 sata_spd_string(fls(mask)));
2673 static int __sata_set_spd_needed(struct ata_link *link, u32 *scontrol)
2675 struct ata_link *host_link = &link->ap->link;
2676 u32 limit, target, spd;
2678 limit = link->sata_spd_limit;
2680 /* Don't configure downstream link faster than upstream link.
2681 * It doesn't speed up anything and some PMPs choke on such
2684 if (!ata_is_host_link(link) && host_link->sata_spd)
2685 limit &= (1 << host_link->sata_spd) - 1;
2687 if (limit == UINT_MAX)
2690 target = fls(limit);
2692 spd = (*scontrol >> 4) & 0xf;
2693 *scontrol = (*scontrol & ~0xf0) | ((target & 0xf) << 4);
2695 return spd != target;
2699 * sata_set_spd_needed - is SATA spd configuration needed
2700 * @link: Link in question
2702 * Test whether the spd limit in SControl matches
2703 * @link->sata_spd_limit. This function is used to determine
2704 * whether hardreset is necessary to apply SATA spd
2708 * Inherited from caller.
2711 * 1 if SATA spd configuration is needed, 0 otherwise.
2713 int sata_set_spd_needed(struct ata_link *link)
2717 if (sata_scr_read(link, SCR_CONTROL, &scontrol))
2720 return __sata_set_spd_needed(link, &scontrol);
2724 * sata_set_spd - set SATA spd according to spd limit
2725 * @link: Link to set SATA spd for
2727 * Set SATA spd of @link according to sata_spd_limit.
2730 * Inherited from caller.
2733 * 0 if spd doesn't need to be changed, 1 if spd has been
2734 * changed. Negative errno if SCR registers are inaccessible.
2736 int sata_set_spd(struct ata_link *link)
2741 if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
2744 if (!__sata_set_spd_needed(link, &scontrol))
2747 if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol)))
2754 * This mode timing computation functionality is ported over from
2755 * drivers/ide/ide-timing.h and was originally written by Vojtech Pavlik
2758 * PIO 0-4, MWDMA 0-2 and UDMA 0-6 timings (in nanoseconds).
2759 * These were taken from ATA/ATAPI-6 standard, rev 0a, except
2760 * for UDMA6, which is currently supported only by Maxtor drives.
2762 * For PIO 5/6 MWDMA 3/4 see the CFA specification 3.0.
2765 static const struct ata_timing ata_timing[] = {
2766 /* { XFER_PIO_SLOW, 120, 290, 240, 960, 290, 240, 960, 0 }, */
2767 { XFER_PIO_0, 70, 290, 240, 600, 165, 150, 600, 0 },
2768 { XFER_PIO_1, 50, 290, 93, 383, 125, 100, 383, 0 },
2769 { XFER_PIO_2, 30, 290, 40, 330, 100, 90, 240, 0 },
2770 { XFER_PIO_3, 30, 80, 70, 180, 80, 70, 180, 0 },
2771 { XFER_PIO_4, 25, 70, 25, 120, 70, 25, 120, 0 },
2772 { XFER_PIO_5, 15, 65, 25, 100, 65, 25, 100, 0 },
2773 { XFER_PIO_6, 10, 55, 20, 80, 55, 20, 80, 0 },
2775 { XFER_SW_DMA_0, 120, 0, 0, 0, 480, 480, 960, 0 },
2776 { XFER_SW_DMA_1, 90, 0, 0, 0, 240, 240, 480, 0 },
2777 { XFER_SW_DMA_2, 60, 0, 0, 0, 120, 120, 240, 0 },
2779 { XFER_MW_DMA_0, 60, 0, 0, 0, 215, 215, 480, 0 },
2780 { XFER_MW_DMA_1, 45, 0, 0, 0, 80, 50, 150, 0 },
2781 { XFER_MW_DMA_2, 25, 0, 0, 0, 70, 25, 120, 0 },
2782 { XFER_MW_DMA_3, 25, 0, 0, 0, 65, 25, 100, 0 },
2783 { XFER_MW_DMA_4, 25, 0, 0, 0, 55, 20, 80, 0 },
2785 /* { XFER_UDMA_SLOW, 0, 0, 0, 0, 0, 0, 0, 150 }, */
2786 { XFER_UDMA_0, 0, 0, 0, 0, 0, 0, 0, 120 },
2787 { XFER_UDMA_1, 0, 0, 0, 0, 0, 0, 0, 80 },
2788 { XFER_UDMA_2, 0, 0, 0, 0, 0, 0, 0, 60 },
2789 { XFER_UDMA_3, 0, 0, 0, 0, 0, 0, 0, 45 },
2790 { XFER_UDMA_4, 0, 0, 0, 0, 0, 0, 0, 30 },
2791 { XFER_UDMA_5, 0, 0, 0, 0, 0, 0, 0, 20 },
2792 { XFER_UDMA_6, 0, 0, 0, 0, 0, 0, 0, 15 },
2797 #define ENOUGH(v, unit) (((v)-1)/(unit)+1)
2798 #define EZ(v, unit) ((v)?ENOUGH(v, unit):0)
2800 static void ata_timing_quantize(const struct ata_timing *t, struct ata_timing *q, int T, int UT)
2802 q->setup = EZ(t->setup * 1000, T);
2803 q->act8b = EZ(t->act8b * 1000, T);
2804 q->rec8b = EZ(t->rec8b * 1000, T);
2805 q->cyc8b = EZ(t->cyc8b * 1000, T);
2806 q->active = EZ(t->active * 1000, T);
2807 q->recover = EZ(t->recover * 1000, T);
2808 q->cycle = EZ(t->cycle * 1000, T);
2809 q->udma = EZ(t->udma * 1000, UT);
2812 void ata_timing_merge(const struct ata_timing *a, const struct ata_timing *b,
2813 struct ata_timing *m, unsigned int what)
2815 if (what & ATA_TIMING_SETUP ) m->setup = max(a->setup, b->setup);
2816 if (what & ATA_TIMING_ACT8B ) m->act8b = max(a->act8b, b->act8b);
2817 if (what & ATA_TIMING_REC8B ) m->rec8b = max(a->rec8b, b->rec8b);
2818 if (what & ATA_TIMING_CYC8B ) m->cyc8b = max(a->cyc8b, b->cyc8b);
2819 if (what & ATA_TIMING_ACTIVE ) m->active = max(a->active, b->active);
2820 if (what & ATA_TIMING_RECOVER) m->recover = max(a->recover, b->recover);
2821 if (what & ATA_TIMING_CYCLE ) m->cycle = max(a->cycle, b->cycle);
2822 if (what & ATA_TIMING_UDMA ) m->udma = max(a->udma, b->udma);
2825 const struct ata_timing *ata_timing_find_mode(u8 xfer_mode)
2827 const struct ata_timing *t = ata_timing;
2829 while (xfer_mode > t->mode)
2832 if (xfer_mode == t->mode)
2837 int ata_timing_compute(struct ata_device *adev, unsigned short speed,
2838 struct ata_timing *t, int T, int UT)
2840 const struct ata_timing *s;
2841 struct ata_timing p;
2847 if (!(s = ata_timing_find_mode(speed)))
2850 memcpy(t, s, sizeof(*s));
2853 * If the drive is an EIDE drive, it can tell us it needs extended
2854 * PIO/MW_DMA cycle timing.
2857 if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE drive */
2858 memset(&p, 0, sizeof(p));
2859 if (speed >= XFER_PIO_0 && speed <= XFER_SW_DMA_0) {
2860 if (speed <= XFER_PIO_2) p.cycle = p.cyc8b = adev->id[ATA_ID_EIDE_PIO];
2861 else p.cycle = p.cyc8b = adev->id[ATA_ID_EIDE_PIO_IORDY];
2862 } else if (speed >= XFER_MW_DMA_0 && speed <= XFER_MW_DMA_2) {
2863 p.cycle = adev->id[ATA_ID_EIDE_DMA_MIN];
2865 ata_timing_merge(&p, t, t, ATA_TIMING_CYCLE | ATA_TIMING_CYC8B);
2869 * Convert the timing to bus clock counts.
2872 ata_timing_quantize(t, t, T, UT);
2875 * Even in DMA/UDMA modes we still use PIO access for IDENTIFY,
2876 * S.M.A.R.T * and some other commands. We have to ensure that the
2877 * DMA cycle timing is slower/equal than the fastest PIO timing.
2880 if (speed > XFER_PIO_6) {
2881 ata_timing_compute(adev, adev->pio_mode, &p, T, UT);
2882 ata_timing_merge(&p, t, t, ATA_TIMING_ALL);
2886 * Lengthen active & recovery time so that cycle time is correct.
2889 if (t->act8b + t->rec8b < t->cyc8b) {
2890 t->act8b += (t->cyc8b - (t->act8b + t->rec8b)) / 2;
2891 t->rec8b = t->cyc8b - t->act8b;
2894 if (t->active + t->recover < t->cycle) {
2895 t->active += (t->cycle - (t->active + t->recover)) / 2;
2896 t->recover = t->cycle - t->active;
2899 /* In a few cases quantisation may produce enough errors to
2900 leave t->cycle too low for the sum of active and recovery
2901 if so we must correct this */
2902 if (t->active + t->recover > t->cycle)
2903 t->cycle = t->active + t->recover;
2909 * ata_timing_cycle2mode - find xfer mode for the specified cycle duration
2910 * @xfer_shift: ATA_SHIFT_* value for transfer type to examine.
2911 * @cycle: cycle duration in ns
2913 * Return matching xfer mode for @cycle. The returned mode is of
2914 * the transfer type specified by @xfer_shift. If @cycle is too
2915 * slow for @xfer_shift, 0xff is returned. If @cycle is faster
2916 * than the fastest known mode, the fasted mode is returned.
2922 * Matching xfer_mode, 0xff if no match found.
2924 u8 ata_timing_cycle2mode(unsigned int xfer_shift, int cycle)
2926 u8 base_mode = 0xff, last_mode = 0xff;
2927 const struct ata_xfer_ent *ent;
2928 const struct ata_timing *t;
2930 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
2931 if (ent->shift == xfer_shift)
2932 base_mode = ent->base;
2934 for (t = ata_timing_find_mode(base_mode);
2935 t && ata_xfer_mode2shift(t->mode) == xfer_shift; t++) {
2936 unsigned short this_cycle;
2938 switch (xfer_shift) {
2940 case ATA_SHIFT_MWDMA:
2941 this_cycle = t->cycle;
2943 case ATA_SHIFT_UDMA:
2944 this_cycle = t->udma;
2950 if (cycle > this_cycle)
2953 last_mode = t->mode;
2960 * ata_down_xfermask_limit - adjust dev xfer masks downward
2961 * @dev: Device to adjust xfer masks
2962 * @sel: ATA_DNXFER_* selector
2964 * Adjust xfer masks of @dev downward. Note that this function
2965 * does not apply the change. Invoking ata_set_mode() afterwards
2966 * will apply the limit.
2969 * Inherited from caller.
2972 * 0 on success, negative errno on failure
2974 int ata_down_xfermask_limit(struct ata_device *dev, unsigned int sel)
2977 unsigned long orig_mask, xfer_mask;
2978 unsigned long pio_mask, mwdma_mask, udma_mask;
2981 quiet = !!(sel & ATA_DNXFER_QUIET);
2982 sel &= ~ATA_DNXFER_QUIET;
2984 xfer_mask = orig_mask = ata_pack_xfermask(dev->pio_mask,
2987 ata_unpack_xfermask(xfer_mask, &pio_mask, &mwdma_mask, &udma_mask);
2990 case ATA_DNXFER_PIO:
2991 highbit = fls(pio_mask) - 1;
2992 pio_mask &= ~(1 << highbit);
2995 case ATA_DNXFER_DMA:
2997 highbit = fls(udma_mask) - 1;
2998 udma_mask &= ~(1 << highbit);
3001 } else if (mwdma_mask) {
3002 highbit = fls(mwdma_mask) - 1;
3003 mwdma_mask &= ~(1 << highbit);
3009 case ATA_DNXFER_40C:
3010 udma_mask &= ATA_UDMA_MASK_40C;
3013 case ATA_DNXFER_FORCE_PIO0:
3015 case ATA_DNXFER_FORCE_PIO:
3024 xfer_mask &= ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask);
3026 if (!(xfer_mask & ATA_MASK_PIO) || xfer_mask == orig_mask)
3030 if (xfer_mask & (ATA_MASK_MWDMA | ATA_MASK_UDMA))
3031 snprintf(buf, sizeof(buf), "%s:%s",
3032 ata_mode_string(xfer_mask),
3033 ata_mode_string(xfer_mask & ATA_MASK_PIO));
3035 snprintf(buf, sizeof(buf), "%s",
3036 ata_mode_string(xfer_mask));
3038 ata_dev_printk(dev, KERN_WARNING,
3039 "limiting speed to %s\n", buf);
3042 ata_unpack_xfermask(xfer_mask, &dev->pio_mask, &dev->mwdma_mask,
3048 static int ata_dev_set_mode(struct ata_device *dev)
3050 struct ata_eh_context *ehc = &dev->link->eh_context;
3051 const char *dev_err_whine = "";
3052 int ign_dev_err = 0;
3053 unsigned int err_mask;
3056 dev->flags &= ~ATA_DFLAG_PIO;
3057 if (dev->xfer_shift == ATA_SHIFT_PIO)
3058 dev->flags |= ATA_DFLAG_PIO;
3060 err_mask = ata_dev_set_xfermode(dev);
3062 if (err_mask & ~AC_ERR_DEV)
3066 ehc->i.flags |= ATA_EHI_POST_SETMODE;
3067 rc = ata_dev_revalidate(dev, ATA_DEV_UNKNOWN, 0);
3068 ehc->i.flags &= ~ATA_EHI_POST_SETMODE;
3072 /* Old CFA may refuse this command, which is just fine */
3073 if (dev->xfer_shift == ATA_SHIFT_PIO && ata_id_is_cfa(dev->id))
3076 /* Some very old devices and some bad newer ones fail any kind of
3077 SET_XFERMODE request but support PIO0-2 timings and no IORDY */
3078 if (dev->xfer_shift == ATA_SHIFT_PIO && !ata_id_has_iordy(dev->id) &&
3079 dev->pio_mode <= XFER_PIO_2)
3082 /* Early MWDMA devices do DMA but don't allow DMA mode setting.
3083 Don't fail an MWDMA0 set IFF the device indicates it is in MWDMA0 */
3084 if (dev->xfer_shift == ATA_SHIFT_MWDMA &&
3085 dev->dma_mode == XFER_MW_DMA_0 &&
3086 (dev->id[63] >> 8) & 1)
3089 /* if the device is actually configured correctly, ignore dev err */
3090 if (dev->xfer_mode == ata_xfer_mask2mode(ata_id_xfermask(dev->id)))
3093 if (err_mask & AC_ERR_DEV) {
3097 dev_err_whine = " (device error ignored)";
3100 DPRINTK("xfer_shift=%u, xfer_mode=0x%x\n",
3101 dev->xfer_shift, (int)dev->xfer_mode);
3103 ata_dev_printk(dev, KERN_INFO, "configured for %s%s\n",
3104 ata_mode_string(ata_xfer_mode2mask(dev->xfer_mode)),
3110 ata_dev_printk(dev, KERN_ERR, "failed to set xfermode "
3111 "(err_mask=0x%x)\n", err_mask);
3116 * ata_do_set_mode - Program timings and issue SET FEATURES - XFER
3117 * @link: link on which timings will be programmed
3118 * @r_failed_dev: out parameter for failed device
3120 * Standard implementation of the function used to tune and set
3121 * ATA device disk transfer mode (PIO3, UDMA6, etc.). If
3122 * ata_dev_set_mode() fails, pointer to the failing device is
3123 * returned in @r_failed_dev.
3126 * PCI/etc. bus probe sem.
3129 * 0 on success, negative errno otherwise
3132 int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev)
3134 struct ata_port *ap = link->ap;
3135 struct ata_device *dev;
3136 int rc = 0, used_dma = 0, found = 0;
3138 /* step 1: calculate xfer_mask */
3139 ata_link_for_each_dev(dev, link) {
3140 unsigned long pio_mask, dma_mask;
3141 unsigned int mode_mask;
3143 if (!ata_dev_enabled(dev))
3146 mode_mask = ATA_DMA_MASK_ATA;
3147 if (dev->class == ATA_DEV_ATAPI)
3148 mode_mask = ATA_DMA_MASK_ATAPI;
3149 else if (ata_id_is_cfa(dev->id))
3150 mode_mask = ATA_DMA_MASK_CFA;
3152 ata_dev_xfermask(dev);
3154 pio_mask = ata_pack_xfermask(dev->pio_mask, 0, 0);
3155 dma_mask = ata_pack_xfermask(0, dev->mwdma_mask, dev->udma_mask);
3157 if (libata_dma_mask & mode_mask)
3158 dma_mask = ata_pack_xfermask(0, dev->mwdma_mask, dev->udma_mask);
3162 dev->pio_mode = ata_xfer_mask2mode(pio_mask);
3163 dev->dma_mode = ata_xfer_mask2mode(dma_mask);
3166 if (dev->dma_mode != 0xff)
3172 /* step 2: always set host PIO timings */
3173 ata_link_for_each_dev(dev, link) {
3174 if (!ata_dev_enabled(dev))
3177 if (dev->pio_mode == 0xff) {
3178 ata_dev_printk(dev, KERN_WARNING, "no PIO support\n");
3183 dev->xfer_mode = dev->pio_mode;
3184 dev->xfer_shift = ATA_SHIFT_PIO;
3185 if (ap->ops->set_piomode)
3186 ap->ops->set_piomode(ap, dev);
3189 /* step 3: set host DMA timings */
3190 ata_link_for_each_dev(dev, link) {
3191 if (!ata_dev_enabled(dev) || dev->dma_mode == 0xff)
3194 dev->xfer_mode = dev->dma_mode;
3195 dev->xfer_shift = ata_xfer_mode2shift(dev->dma_mode);
3196 if (ap->ops->set_dmamode)
3197 ap->ops->set_dmamode(ap, dev);
3200 /* step 4: update devices' xfer mode */
3201 ata_link_for_each_dev(dev, link) {
3202 /* don't update suspended devices' xfer mode */
3203 if (!ata_dev_enabled(dev))
3206 rc = ata_dev_set_mode(dev);
3211 /* Record simplex status. If we selected DMA then the other
3212 * host channels are not permitted to do so.
3214 if (used_dma && (ap->host->flags & ATA_HOST_SIMPLEX))
3215 ap->host->simplex_claimed = ap;
3219 *r_failed_dev = dev;
3224 * ata_tf_to_host - issue ATA taskfile to host controller
3225 * @ap: port to which command is being issued
3226 * @tf: ATA taskfile register set
3228 * Issues ATA taskfile register set to ATA host controller,
3229 * with proper synchronization with interrupt handler and
3233 * spin_lock_irqsave(host lock)
3236 static inline void ata_tf_to_host(struct ata_port *ap,
3237 const struct ata_taskfile *tf)
3239 ap->ops->tf_load(ap, tf);
3240 ap->ops->exec_command(ap, tf);
3244 * ata_busy_sleep - sleep until BSY clears, or timeout
3245 * @ap: port containing status register to be polled
3246 * @tmout_pat: impatience timeout
3247 * @tmout: overall timeout
3249 * Sleep until ATA Status register bit BSY clears,
3250 * or a timeout occurs.
3253 * Kernel thread context (may sleep).
3256 * 0 on success, -errno otherwise.
3258 int ata_busy_sleep(struct ata_port *ap,
3259 unsigned long tmout_pat, unsigned long tmout)
3261 unsigned long timer_start, timeout;
3264 status = ata_busy_wait(ap, ATA_BUSY, 300);
3265 timer_start = jiffies;
3266 timeout = timer_start + tmout_pat;
3267 while (status != 0xff && (status & ATA_BUSY) &&
3268 time_before(jiffies, timeout)) {
3270 status = ata_busy_wait(ap, ATA_BUSY, 3);
3273 if (status != 0xff && (status & ATA_BUSY))
3274 ata_port_printk(ap, KERN_WARNING,
3275 "port is slow to respond, please be patient "
3276 "(Status 0x%x)\n", status);
3278 timeout = timer_start + tmout;
3279 while (status != 0xff && (status & ATA_BUSY) &&
3280 time_before(jiffies, timeout)) {
3282 status = ata_chk_status(ap);
3288 if (status & ATA_BUSY) {
3289 ata_port_printk(ap, KERN_ERR, "port failed to respond "
3290 "(%lu secs, Status 0x%x)\n",
3291 tmout / HZ, status);
3299 * ata_wait_after_reset - wait before checking status after reset
3300 * @ap: port containing status register to be polled
3301 * @deadline: deadline jiffies for the operation
3303 * After reset, we need to pause a while before reading status.
3304 * Also, certain combination of controller and device report 0xff
3305 * for some duration (e.g. until SATA PHY is up and running)
3306 * which is interpreted as empty port in ATA world. This
3307 * function also waits for such devices to get out of 0xff
3311 * Kernel thread context (may sleep).
3313 void ata_wait_after_reset(struct ata_port *ap, unsigned long deadline)
3315 unsigned long until = jiffies + ATA_TMOUT_FF_WAIT;
3317 if (time_before(until, deadline))
3320 /* Spec mandates ">= 2ms" before checking status. We wait
3321 * 150ms, because that was the magic delay used for ATAPI
3322 * devices in Hale Landis's ATADRVR, for the period of time
3323 * between when the ATA command register is written, and then
3324 * status is checked. Because waiting for "a while" before
3325 * checking status is fine, post SRST, we perform this magic
3326 * delay here as well.
3328 * Old drivers/ide uses the 2mS rule and then waits for ready.
3332 /* Wait for 0xff to clear. Some SATA devices take a long time
3333 * to clear 0xff after reset. For example, HHD424020F7SV00
3334 * iVDR needs >= 800ms while. Quantum GoVault needs even more
3337 * Note that some PATA controllers (pata_ali) explode if
3338 * status register is read more than once when there's no
3341 if (ap->flags & ATA_FLAG_SATA) {
3343 u8 status = ata_chk_status(ap);
3345 if (status != 0xff || time_after(jiffies, deadline))
3354 * ata_wait_ready - sleep until BSY clears, or timeout
3355 * @ap: port containing status register to be polled
3356 * @deadline: deadline jiffies for the operation
3358 * Sleep until ATA Status register bit BSY clears, or timeout
3362 * Kernel thread context (may sleep).
3365 * 0 on success, -errno otherwise.
3367 int ata_wait_ready(struct ata_port *ap, unsigned long deadline)
3369 unsigned long start = jiffies;
3373 u8 status = ata_chk_status(ap);
3374 unsigned long now = jiffies;
3376 if (!(status & ATA_BUSY))
3378 if (!ata_link_online(&ap->link) && status == 0xff)
3380 if (time_after(now, deadline))
3383 if (!warned && time_after(now, start + 5 * HZ) &&
3384 (deadline - now > 3 * HZ)) {
3385 ata_port_printk(ap, KERN_WARNING,
3386 "port is slow to respond, please be patient "
3387 "(Status 0x%x)\n", status);
3395 static int ata_bus_post_reset(struct ata_port *ap, unsigned int devmask,
3396 unsigned long deadline)
3398 struct ata_ioports *ioaddr = &ap->ioaddr;
3399 unsigned int dev0 = devmask & (1 << 0);
3400 unsigned int dev1 = devmask & (1 << 1);
3403 /* if device 0 was found in ata_devchk, wait for its
3407 rc = ata_wait_ready(ap, deadline);
3415 /* if device 1 was found in ata_devchk, wait for register
3416 * access briefly, then wait for BSY to clear.
3421 ap->ops->dev_select(ap, 1);
3423 /* Wait for register access. Some ATAPI devices fail
3424 * to set nsect/lbal after reset, so don't waste too
3425 * much time on it. We're gonna wait for !BSY anyway.
3427 for (i = 0; i < 2; i++) {
3430 nsect = ioread8(ioaddr->nsect_addr);
3431 lbal = ioread8(ioaddr->lbal_addr);
3432 if ((nsect == 1) && (lbal == 1))
3434 msleep(50); /* give drive a breather */
3437 rc = ata_wait_ready(ap, deadline);
3445 /* is all this really necessary? */
3446 ap->ops->dev_select(ap, 0);
3448 ap->ops->dev_select(ap, 1);
3450 ap->ops->dev_select(ap, 0);
3455 static int ata_bus_softreset(struct ata_port *ap, unsigned int devmask,
3456 unsigned long deadline)
3458 struct ata_ioports *ioaddr = &ap->ioaddr;
3460 DPRINTK("ata%u: bus reset via SRST\n", ap->print_id);
3462 /* software reset. causes dev0 to be selected */
3463 iowrite8(ap->ctl, ioaddr->ctl_addr);
3464 udelay(20); /* FIXME: flush */
3465 iowrite8(ap->ctl | ATA_SRST, ioaddr->ctl_addr);
3466 udelay(20); /* FIXME: flush */
3467 iowrite8(ap->ctl, ioaddr->ctl_addr);
3469 /* wait a while before checking status */
3470 ata_wait_after_reset(ap, deadline);
3472 /* Before we perform post reset processing we want to see if
3473 * the bus shows 0xFF because the odd clown forgets the D7
3474 * pulldown resistor.
3476 if (ata_chk_status(ap) == 0xFF)
3479 return ata_bus_post_reset(ap, devmask, deadline);
3483 * ata_bus_reset - reset host port and associated ATA channel
3484 * @ap: port to reset
3486 * This is typically the first time we actually start issuing
3487 * commands to the ATA channel. We wait for BSY to clear, then
3488 * issue EXECUTE DEVICE DIAGNOSTIC command, polling for its
3489 * result. Determine what devices, if any, are on the channel
3490 * by looking at the device 0/1 error register. Look at the signature
3491 * stored in each device's taskfile registers, to determine if
3492 * the device is ATA or ATAPI.
3495 * PCI/etc. bus probe sem.
3496 * Obtains host lock.
3499 * Sets ATA_FLAG_DISABLED if bus reset fails.
3502 void ata_bus_reset(struct ata_port *ap)
3504 struct ata_device *device = ap->link.device;
3505 struct ata_ioports *ioaddr = &ap->ioaddr;
3506 unsigned int slave_possible = ap->flags & ATA_FLAG_SLAVE_POSS;
3508 unsigned int dev0, dev1 = 0, devmask = 0;
3511 DPRINTK("ENTER, host %u, port %u\n", ap->print_id, ap->port_no);
3513 /* determine if device 0/1 are present */
3514 if (ap->flags & ATA_FLAG_SATA_RESET)
3517 dev0 = ata_devchk(ap, 0);
3519 dev1 = ata_devchk(ap, 1);
3523 devmask |= (1 << 0);
3525 devmask |= (1 << 1);
3527 /* select device 0 again */
3528 ap->ops->dev_select(ap, 0);
3530 /* issue bus reset */
3531 if (ap->flags & ATA_FLAG_SRST) {
3532 rc = ata_bus_softreset(ap, devmask, jiffies + 40 * HZ);
3533 if (rc && rc != -ENODEV)
3538 * determine by signature whether we have ATA or ATAPI devices
3540 device[0].class = ata_dev_try_classify(&device[0], dev0, &err);
3541 if ((slave_possible) && (err != 0x81))
3542 device[1].class = ata_dev_try_classify(&device[1], dev1, &err);
3544 /* is double-select really necessary? */
3545 if (device[1].class != ATA_DEV_NONE)
3546 ap->ops->dev_select(ap, 1);
3547 if (device[0].class != ATA_DEV_NONE)
3548 ap->ops->dev_select(ap, 0);
3550 /* if no devices were detected, disable this port */
3551 if ((device[0].class == ATA_DEV_NONE) &&
3552 (device[1].class == ATA_DEV_NONE))
3555 if (ap->flags & (ATA_FLAG_SATA_RESET | ATA_FLAG_SRST)) {
3556 /* set up device control for ATA_FLAG_SATA_RESET */
3557 iowrite8(ap->ctl, ioaddr->ctl_addr);
3564 ata_port_printk(ap, KERN_ERR, "disabling port\n");
3565 ata_port_disable(ap);
3571 * sata_link_debounce - debounce SATA phy status
3572 * @link: ATA link to debounce SATA phy status for
3573 * @params: timing parameters { interval, duratinon, timeout } in msec
3574 * @deadline: deadline jiffies for the operation
3576 * Make sure SStatus of @link reaches stable state, determined by
3577 * holding the same value where DET is not 1 for @duration polled
3578 * every @interval, before @timeout. Timeout constraints the
3579 * beginning of the stable state. Because DET gets stuck at 1 on
3580 * some controllers after hot unplugging, this functions waits
3581 * until timeout then returns 0 if DET is stable at 1.
3583 * @timeout is further limited by @deadline. The sooner of the
3587 * Kernel thread context (may sleep)
3590 * 0 on success, -errno on failure.
3592 int sata_link_debounce(struct ata_link *link, const unsigned long *params,
3593 unsigned long deadline)
3595 unsigned long interval_msec = params[0];
3596 unsigned long duration = msecs_to_jiffies(params[1]);
3597 unsigned long last_jiffies, t;
3601 t = jiffies + msecs_to_jiffies(params[2]);
3602 if (time_before(t, deadline))
3605 if ((rc = sata_scr_read(link, SCR_STATUS, &cur)))
3610 last_jiffies = jiffies;
3613 msleep(interval_msec);
3614 if ((rc = sata_scr_read(link, SCR_STATUS, &cur)))
3620 if (cur == 1 && time_before(jiffies, deadline))
3622 if (time_after(jiffies, last_jiffies + duration))
3627 /* unstable, start over */
3629 last_jiffies = jiffies;
3631 /* Check deadline. If debouncing failed, return
3632 * -EPIPE to tell upper layer to lower link speed.
3634 if (time_after(jiffies, deadline))
3640 * sata_link_resume - resume SATA link
3641 * @link: ATA link to resume SATA
3642 * @params: timing parameters { interval, duratinon, timeout } in msec
3643 * @deadline: deadline jiffies for the operation
3645 * Resume SATA phy @link and debounce it.
3648 * Kernel thread context (may sleep)
3651 * 0 on success, -errno on failure.
3653 int sata_link_resume(struct ata_link *link, const unsigned long *params,
3654 unsigned long deadline)
3659 if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
3662 scontrol = (scontrol & 0x0f0) | 0x300;
3664 if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol)))
3667 /* Some PHYs react badly if SStatus is pounded immediately
3668 * after resuming. Delay 200ms before debouncing.
3672 return sata_link_debounce(link, params, deadline);
3676 * ata_std_prereset - prepare for reset
3677 * @link: ATA link to be reset
3678 * @deadline: deadline jiffies for the operation
3680 * @link is about to be reset. Initialize it. Failure from
3681 * prereset makes libata abort whole reset sequence and give up
3682 * that port, so prereset should be best-effort. It does its
3683 * best to prepare for reset sequence but if things go wrong, it
3684 * should just whine, not fail.
3687 * Kernel thread context (may sleep)
3690 * 0 on success, -errno otherwise.
3692 int ata_std_prereset(struct ata_link *link, unsigned long deadline)
3694 struct ata_port *ap = link->ap;
3695 struct ata_eh_context *ehc = &link->eh_context;
3696 const unsigned long *timing = sata_ehc_deb_timing(ehc);
3699 /* handle link resume */
3700 if ((ehc->i.flags & ATA_EHI_RESUME_LINK) &&
3701 (link->flags & ATA_LFLAG_HRST_TO_RESUME))
3702 ehc->i.action |= ATA_EH_HARDRESET;
3704 /* Some PMPs don't work with only SRST, force hardreset if PMP
3707 if (ap->flags & ATA_FLAG_PMP)
3708 ehc->i.action |= ATA_EH_HARDRESET;
3710 /* if we're about to do hardreset, nothing more to do */
3711 if (ehc->i.action & ATA_EH_HARDRESET)
3714 /* if SATA, resume link */
3715 if (ap->flags & ATA_FLAG_SATA) {
3716 rc = sata_link_resume(link, timing, deadline);
3717 /* whine about phy resume failure but proceed */
3718 if (rc && rc != -EOPNOTSUPP)
3719 ata_link_printk(link, KERN_WARNING, "failed to resume "
3720 "link for reset (errno=%d)\n", rc);
3723 /* Wait for !BSY if the controller can wait for the first D2H
3724 * Reg FIS and we don't know that no device is attached.
3726 if (!(link->flags & ATA_LFLAG_SKIP_D2H_BSY) && !ata_link_offline(link)) {
3727 rc = ata_wait_ready(ap, deadline);
3728 if (rc && rc != -ENODEV) {
3729 ata_link_printk(link, KERN_WARNING, "device not ready "
3730 "(errno=%d), forcing hardreset\n", rc);
3731 ehc->i.action |= ATA_EH_HARDRESET;
3739 * ata_std_softreset - reset host port via ATA SRST
3740 * @link: ATA link to reset
3741 * @classes: resulting classes of attached devices
3742 * @deadline: deadline jiffies for the operation
3744 * Reset host port using ATA SRST.
3747 * Kernel thread context (may sleep)
3750 * 0 on success, -errno otherwise.
3752 int ata_std_softreset(struct ata_link *link, unsigned int *classes,
3753 unsigned long deadline)
3755 struct ata_port *ap = link->ap;
3756 unsigned int slave_possible = ap->flags & ATA_FLAG_SLAVE_POSS;
3757 unsigned int devmask = 0;
3763 if (ata_link_offline(link)) {
3764 classes[0] = ATA_DEV_NONE;
3768 /* determine if device 0/1 are present */
3769 if (ata_devchk(ap, 0))
3770 devmask |= (1 << 0);
3771 if (slave_possible && ata_devchk(ap, 1))
3772 devmask |= (1 << 1);
3774 /* select device 0 again */
3775 ap->ops->dev_select(ap, 0);
3777 /* issue bus reset */
3778 DPRINTK("about to softreset, devmask=%x\n", devmask);
3779 rc = ata_bus_softreset(ap, devmask, deadline);
3780 /* if link is occupied, -ENODEV too is an error */
3781 if (rc && (rc != -ENODEV || sata_scr_valid(link))) {
3782 ata_link_printk(link, KERN_ERR, "SRST failed (errno=%d)\n", rc);
3786 /* determine by signature whether we have ATA or ATAPI devices */
3787 classes[0] = ata_dev_try_classify(&link->device[0],
3788 devmask & (1 << 0), &err);
3789 if (slave_possible && err != 0x81)
3790 classes[1] = ata_dev_try_classify(&link->device[1],
3791 devmask & (1 << 1), &err);
3794 DPRINTK("EXIT, classes[0]=%u [1]=%u\n", classes[0], classes[1]);
3799 * sata_link_hardreset - reset link via SATA phy reset
3800 * @link: link to reset
3801 * @timing: timing parameters { interval, duratinon, timeout } in msec
3802 * @deadline: deadline jiffies for the operation
3804 * SATA phy-reset @link using DET bits of SControl register.
3807 * Kernel thread context (may sleep)
3810 * 0 on success, -errno otherwise.
3812 int sata_link_hardreset(struct ata_link *link, const unsigned long *timing,
3813 unsigned long deadline)
3820 if (sata_set_spd_needed(link)) {
3821 /* SATA spec says nothing about how to reconfigure
3822 * spd. To be on the safe side, turn off phy during
3823 * reconfiguration. This works for at least ICH7 AHCI
3826 if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
3829 scontrol = (scontrol & 0x0f0) | 0x304;
3831 if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol)))
3837 /* issue phy wake/reset */
3838 if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
3841 scontrol = (scontrol & 0x0f0) | 0x301;
3843 if ((rc = sata_scr_write_flush(link, SCR_CONTROL, scontrol)))
3846 /* Couldn't find anything in SATA I/II specs, but AHCI-1.1
3847 * 10.4.2 says at least 1 ms.
3851 /* bring link back */
3852 rc = sata_link_resume(link, timing, deadline);
3854 DPRINTK("EXIT, rc=%d\n", rc);
3859 * sata_std_hardreset - reset host port via SATA phy reset
3860 * @link: link to reset
3861 * @class: resulting class of attached device
3862 * @deadline: deadline jiffies for the operation
3864 * SATA phy-reset host port using DET bits of SControl register,
3865 * wait for !BSY and classify the attached device.
3868 * Kernel thread context (may sleep)
3871 * 0 on success, -errno otherwise.
3873 int sata_std_hardreset(struct ata_link *link, unsigned int *class,
3874 unsigned long deadline)
3876 struct ata_port *ap = link->ap;
3877 const unsigned long *timing = sata_ehc_deb_timing(&link->eh_context);
3883 rc = sata_link_hardreset(link, timing, deadline);
3885 ata_link_printk(link, KERN_ERR,
3886 "COMRESET failed (errno=%d)\n", rc);
3890 /* TODO: phy layer with polling, timeouts, etc. */
3891 if (ata_link_offline(link)) {
3892 *class = ATA_DEV_NONE;
3893 DPRINTK("EXIT, link offline\n");
3897 /* wait a while before checking status */
3898 ata_wait_after_reset(ap, deadline);
3900 /* If PMP is supported, we have to do follow-up SRST. Note
3901 * that some PMPs don't send D2H Reg FIS after hardreset at
3902 * all if the first port is empty. Wait for it just for a
3903 * second and request follow-up SRST.
3905 if (ap->flags & ATA_FLAG_PMP) {
3906 ata_wait_ready(ap, jiffies + HZ);
3910 rc = ata_wait_ready(ap, deadline);
3911 /* link occupied, -ENODEV too is an error */
3913 ata_link_printk(link, KERN_ERR,
3914 "COMRESET failed (errno=%d)\n", rc);
3918 ap->ops->dev_select(ap, 0); /* probably unnecessary */
3920 *class = ata_dev_try_classify(link->device, 1, NULL);
3922 DPRINTK("EXIT, class=%u\n", *class);
3927 * ata_std_postreset - standard postreset callback
3928 * @link: the target ata_link
3929 * @classes: classes of attached devices
3931 * This function is invoked after a successful reset. Note that
3932 * the device might have been reset more than once using
3933 * different reset methods before postreset is invoked.
3936 * Kernel thread context (may sleep)
3938 void ata_std_postreset(struct ata_link *link, unsigned int *classes)
3940 struct ata_port *ap = link->ap;
3945 /* print link status */
3946 sata_print_link_status(link);
3949 if (sata_scr_read(link, SCR_ERROR, &serror) == 0)
3950 sata_scr_write(link, SCR_ERROR, serror);
3951 link->eh_info.serror = 0;
3953 /* is double-select really necessary? */
3954 if (classes[0] != ATA_DEV_NONE)
3955 ap->ops->dev_select(ap, 1);
3956 if (classes[1] != ATA_DEV_NONE)
3957 ap->ops->dev_select(ap, 0);
3959 /* bail out if no device is present */
3960 if (classes[0] == ATA_DEV_NONE && classes[1] == ATA_DEV_NONE) {
3961 DPRINTK("EXIT, no device\n");
3965 /* set up device control */
3966 if (ap->ioaddr.ctl_addr)
3967 iowrite8(ap->ctl, ap->ioaddr.ctl_addr);
3973 * ata_dev_same_device - Determine whether new ID matches configured device
3974 * @dev: device to compare against
3975 * @new_class: class of the new device
3976 * @new_id: IDENTIFY page of the new device
3978 * Compare @new_class and @new_id against @dev and determine
3979 * whether @dev is the device indicated by @new_class and
3986 * 1 if @dev matches @new_class and @new_id, 0 otherwise.
3988 static int ata_dev_same_device(struct ata_device *dev, unsigned int new_class,
3991 const u16 *old_id = dev->id;
3992 unsigned char model[2][ATA_ID_PROD_LEN + 1];
3993 unsigned char serial[2][ATA_ID_SERNO_LEN + 1];
3995 if (dev->class != new_class) {
3996 ata_dev_printk(dev, KERN_INFO, "class mismatch %d != %d\n",
3997 dev->class, new_class);
4001 ata_id_c_string(old_id, model[0], ATA_ID_PROD, sizeof(model[0]));
4002 ata_id_c_string(new_id, model[1], ATA_ID_PROD, sizeof(model[1]));
4003 ata_id_c_string(old_id, serial[0], ATA_ID_SERNO, sizeof(serial[0]));
4004 ata_id_c_string(new_id, serial[1], ATA_ID_SERNO, sizeof(serial[1]));
4006 if (strcmp(model[0], model[1])) {
4007 ata_dev_printk(dev, KERN_INFO, "model number mismatch "
4008 "'%s' != '%s'\n", model[0], model[1]);
4012 if (strcmp(serial[0], serial[1])) {
4013 ata_dev_printk(dev, KERN_INFO, "serial number mismatch "
4014 "'%s' != '%s'\n", serial[0], serial[1]);
4022 * ata_dev_reread_id - Re-read IDENTIFY data
4023 * @dev: target ATA device
4024 * @readid_flags: read ID flags
4026 * Re-read IDENTIFY page and make sure @dev is still attached to
4030 * Kernel thread context (may sleep)
4033 * 0 on success, negative errno otherwise
4035 int ata_dev_reread_id(struct ata_device *dev, unsigned int readid_flags)
4037 unsigned int class = dev->class;
4038 u16 *id = (void *)dev->link->ap->sector_buf;
4042 rc = ata_dev_read_id(dev, &class, readid_flags, id);
4046 /* is the device still there? */
4047 if (!ata_dev_same_device(dev, class, id))
4050 memcpy(dev->id, id, sizeof(id[0]) * ATA_ID_WORDS);
4055 * ata_dev_revalidate - Revalidate ATA device
4056 * @dev: device to revalidate
4057 * @new_class: new class code
4058 * @readid_flags: read ID flags
4060 * Re-read IDENTIFY page, make sure @dev is still attached to the
4061 * port and reconfigure it according to the new IDENTIFY page.
4064 * Kernel thread context (may sleep)
4067 * 0 on success, negative errno otherwise
4069 int ata_dev_revalidate(struct ata_device *dev, unsigned int new_class,
4070 unsigned int readid_flags)
4072 u64 n_sectors = dev->n_sectors;
4075 if (!ata_dev_enabled(dev))
4078 /* fail early if !ATA && !ATAPI to avoid issuing [P]IDENTIFY to PMP */
4079 if (ata_class_enabled(new_class) &&
4080 new_class != ATA_DEV_ATA && new_class != ATA_DEV_ATAPI) {
4081 ata_dev_printk(dev, KERN_INFO, "class mismatch %u != %u\n",
4082 dev->class, new_class);
4088 rc = ata_dev_reread_id(dev, readid_flags);
4092 /* configure device according to the new ID */
4093 rc = ata_dev_configure(dev);
4097 /* verify n_sectors hasn't changed */
4098 if (dev->class == ATA_DEV_ATA && n_sectors &&
4099 dev->n_sectors != n_sectors) {
4100 ata_dev_printk(dev, KERN_INFO, "n_sectors mismatch "
4102 (unsigned long long)n_sectors,
4103 (unsigned long long)dev->n_sectors);
4105 /* restore original n_sectors */
4106 dev->n_sectors = n_sectors;
4115 ata_dev_printk(dev, KERN_ERR, "revalidation failed (errno=%d)\n", rc);
4119 struct ata_blacklist_entry {
4120 const char *model_num;
4121 const char *model_rev;
4122 unsigned long horkage;
4125 static const struct ata_blacklist_entry ata_device_blacklist [] = {
4126 /* Devices with DMA related problems under Linux */
4127 { "WDC AC11000H", NULL, ATA_HORKAGE_NODMA },
4128 { "WDC AC22100H", NULL, ATA_HORKAGE_NODMA },
4129 { "WDC AC32500H", NULL, ATA_HORKAGE_NODMA },
4130 { "WDC AC33100H", NULL, ATA_HORKAGE_NODMA },
4131 { "WDC AC31600H", NULL, ATA_HORKAGE_NODMA },
4132 { "WDC AC32100H", "24.09P07", ATA_HORKAGE_NODMA },
4133 { "WDC AC23200L", "21.10N21", ATA_HORKAGE_NODMA },
4134 { "Compaq CRD-8241B", NULL, ATA_HORKAGE_NODMA },
4135 { "CRD-8400B", NULL, ATA_HORKAGE_NODMA },
4136 { "CRD-8480B", NULL, ATA_HORKAGE_NODMA },
4137 { "CRD-8482B", NULL, ATA_HORKAGE_NODMA },
4138 { "CRD-84", NULL, ATA_HORKAGE_NODMA },
4139 { "SanDisk SDP3B", NULL, ATA_HORKAGE_NODMA },
4140 { "SanDisk SDP3B-64", NULL, ATA_HORKAGE_NODMA },
4141 { "SANYO CD-ROM CRD", NULL, ATA_HORKAGE_NODMA },
4142 { "HITACHI CDR-8", NULL, ATA_HORKAGE_NODMA },
4143 { "HITACHI CDR-8335", NULL, ATA_HORKAGE_NODMA },
4144 { "HITACHI CDR-8435", NULL, ATA_HORKAGE_NODMA },
4145 { "Toshiba CD-ROM XM-6202B", NULL, ATA_HORKAGE_NODMA },
4146 { "TOSHIBA CD-ROM XM-1702BC", NULL, ATA_HORKAGE_NODMA },
4147 { "CD-532E-A", NULL, ATA_HORKAGE_NODMA },
4148 { "E-IDE CD-ROM CR-840",NULL, ATA_HORKAGE_NODMA },
4149 { "CD-ROM Drive/F5A", NULL, ATA_HORKAGE_NODMA },
4150 { "WPI CDD-820", NULL, ATA_HORKAGE_NODMA },
4151 { "SAMSUNG CD-ROM SC-148C", NULL, ATA_HORKAGE_NODMA },
4152 { "SAMSUNG CD-ROM SC", NULL, ATA_HORKAGE_NODMA },
4153 { "ATAPI CD-ROM DRIVE 40X MAXIMUM",NULL,ATA_HORKAGE_NODMA },
4154 { "_NEC DV5800A", NULL, ATA_HORKAGE_NODMA },
4155 { "SAMSUNG CD-ROM SN-124", "N001", ATA_HORKAGE_NODMA },
4156 { "Seagate STT20000A", NULL, ATA_HORKAGE_NODMA },
4157 /* Odd clown on sil3726/4726 PMPs */
4158 { "Config Disk", NULL, ATA_HORKAGE_NODMA |
4159 ATA_HORKAGE_SKIP_PM },
4161 /* Weird ATAPI devices */
4162 { "TORiSAN DVD-ROM DRD-N216", NULL, ATA_HORKAGE_MAX_SEC_128 },
4164 /* Devices we expect to fail diagnostics */
4166 /* Devices where NCQ should be avoided */
4168 { "WDC WD740ADFD-00", NULL, ATA_HORKAGE_NONCQ },
4169 { "WDC WD740ADFD-00NLR1", NULL, ATA_HORKAGE_NONCQ, },
4170 /* http://thread.gmane.org/gmane.linux.ide/14907 */
4171 { "FUJITSU MHT2060BH", NULL, ATA_HORKAGE_NONCQ },
4173 { "Maxtor *", "BANC*", ATA_HORKAGE_NONCQ },
4174 { "Maxtor 7V300F0", "VA111630", ATA_HORKAGE_NONCQ },
4175 { "ST380817AS", "3.42", ATA_HORKAGE_NONCQ },
4176 { "ST3160023AS", "3.42", ATA_HORKAGE_NONCQ },
4178 /* Blacklist entries taken from Silicon Image 3124/3132
4179 Windows driver .inf file - also several Linux problem reports */
4180 { "HTS541060G9SA00", "MB3OC60D", ATA_HORKAGE_NONCQ, },
4181 { "HTS541080G9SA00", "MB4OC60D", ATA_HORKAGE_NONCQ, },
4182 { "HTS541010G9SA00", "MBZOC60D", ATA_HORKAGE_NONCQ, },
4184 /* devices which puke on READ_NATIVE_MAX */
4185 { "HDS724040KLSA80", "KFAOA20N", ATA_HORKAGE_BROKEN_HPA, },
4186 { "WDC WD3200JD-00KLB0", "WD-WCAMR1130137", ATA_HORKAGE_BROKEN_HPA },
4187 { "WDC WD2500JD-00HBB0", "WD-WMAL71490727", ATA_HORKAGE_BROKEN_HPA },
4188 { "MAXTOR 6L080L4", "A93.0500", ATA_HORKAGE_BROKEN_HPA },
4190 /* Devices which report 1 sector over size HPA */
4191 { "ST340823A", NULL, ATA_HORKAGE_HPA_SIZE, },
4192 { "ST320413A", NULL, ATA_HORKAGE_HPA_SIZE, },
4194 /* Devices which get the IVB wrong */
4195 { "QUANTUM FIREBALLlct10 05", "A03.0900", ATA_HORKAGE_IVB, },
4196 { "TSSTcorp CDDVDW SH-S202J", "SB00", ATA_HORKAGE_IVB, },
4197 { "TSSTcorp CDDVDW SH-S202J", "SB01", ATA_HORKAGE_IVB, },
4198 { "TSSTcorp CDDVDW SH-S202N", "SB00", ATA_HORKAGE_IVB, },
4199 { "TSSTcorp CDDVDW SH-S202N", "SB01", ATA_HORKAGE_IVB, },
4205 static int strn_pattern_cmp(const char *patt, const char *name, int wildchar)
4211 * check for trailing wildcard: *\0
4213 p = strchr(patt, wildchar);
4214 if (p && ((*(p + 1)) == 0))
4225 return strncmp(patt, name, len);
4228 static unsigned long ata_dev_blacklisted(const struct ata_device *dev)
4230 unsigned char model_num[ATA_ID_PROD_LEN + 1];
4231 unsigned char model_rev[ATA_ID_FW_REV_LEN + 1];
4232 const struct ata_blacklist_entry *ad = ata_device_blacklist;
4234 ata_id_c_string(dev->id, model_num, ATA_ID_PROD, sizeof(model_num));
4235 ata_id_c_string(dev->id, model_rev, ATA_ID_FW_REV, sizeof(model_rev));
4237 while (ad->model_num) {
4238 if (!strn_pattern_cmp(ad->model_num, model_num, '*')) {
4239 if (ad->model_rev == NULL)
4241 if (!strn_pattern_cmp(ad->model_rev, model_rev, '*'))
4249 static int ata_dma_blacklisted(const struct ata_device *dev)
4251 /* We don't support polling DMA.
4252 * DMA blacklist those ATAPI devices with CDB-intr (and use PIO)
4253 * if the LLDD handles only interrupts in the HSM_ST_LAST state.
4255 if ((dev->link->ap->flags & ATA_FLAG_PIO_POLLING) &&
4256 (dev->flags & ATA_DFLAG_CDB_INTR))
4258 return (dev->horkage & ATA_HORKAGE_NODMA) ? 1 : 0;
4262 * ata_is_40wire - check drive side detection
4265 * Perform drive side detection decoding, allowing for device vendors
4266 * who can't follow the documentation.
4269 static int ata_is_40wire(struct ata_device *dev)
4271 if (dev->horkage & ATA_HORKAGE_IVB)
4272 return ata_drive_40wire_relaxed(dev->id);
4273 return ata_drive_40wire(dev->id);
4277 * ata_dev_xfermask - Compute supported xfermask of the given device
4278 * @dev: Device to compute xfermask for
4280 * Compute supported xfermask of @dev and store it in
4281 * dev->*_mask. This function is responsible for applying all
4282 * known limits including host controller limits, device
4288 static void ata_dev_xfermask(struct ata_device *dev)
4290 struct ata_link *link = dev->link;
4291 struct ata_port *ap = link->ap;
4292 struct ata_host *host = ap->host;
4293 unsigned long xfer_mask;
4295 /* controller modes available */
4296 xfer_mask = ata_pack_xfermask(ap->pio_mask,
4297 ap->mwdma_mask, ap->udma_mask);
4299 /* drive modes available */
4300 xfer_mask &= ata_pack_xfermask(dev->pio_mask,
4301 dev->mwdma_mask, dev->udma_mask);
4302 xfer_mask &= ata_id_xfermask(dev->id);
4305 * CFA Advanced TrueIDE timings are not allowed on a shared
4308 if (ata_dev_pair(dev)) {
4309 /* No PIO5 or PIO6 */
4310 xfer_mask &= ~(0x03 << (ATA_SHIFT_PIO + 5));
4311 /* No MWDMA3 or MWDMA 4 */
4312 xfer_mask &= ~(0x03 << (ATA_SHIFT_MWDMA + 3));
4315 if (ata_dma_blacklisted(dev)) {
4316 xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA);
4317 ata_dev_printk(dev, KERN_WARNING,
4318 "device is on DMA blacklist, disabling DMA\n");
4321 if ((host->flags & ATA_HOST_SIMPLEX) &&
4322 host->simplex_claimed && host->simplex_claimed != ap) {
4323 xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA);
4324 ata_dev_printk(dev, KERN_WARNING, "simplex DMA is claimed by "
4325 "other device, disabling DMA\n");
4328 if (ap->flags & ATA_FLAG_NO_IORDY)
4329 xfer_mask &= ata_pio_mask_no_iordy(dev);
4331 if (ap->ops->mode_filter)
4332 xfer_mask = ap->ops->mode_filter(dev, xfer_mask);
4334 /* Apply cable rule here. Don't apply it early because when
4335 * we handle hot plug the cable type can itself change.
4336 * Check this last so that we know if the transfer rate was
4337 * solely limited by the cable.
4338 * Unknown or 80 wire cables reported host side are checked
4339 * drive side as well. Cases where we know a 40wire cable
4340 * is used safely for 80 are not checked here.
4342 if (xfer_mask & (0xF8 << ATA_SHIFT_UDMA))
4343 /* UDMA/44 or higher would be available */
4344 if ((ap->cbl == ATA_CBL_PATA40) ||
4345 (ata_is_40wire(dev) &&
4346 (ap->cbl == ATA_CBL_PATA_UNK ||
4347 ap->cbl == ATA_CBL_PATA80))) {
4348 ata_dev_printk(dev, KERN_WARNING,
4349 "limited to UDMA/33 due to 40-wire cable\n");
4350 xfer_mask &= ~(0xF8 << ATA_SHIFT_UDMA);
4353 ata_unpack_xfermask(xfer_mask, &dev->pio_mask,
4354 &dev->mwdma_mask, &dev->udma_mask);
4358 * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command
4359 * @dev: Device to which command will be sent
4361 * Issue SET FEATURES - XFER MODE command to device @dev
4365 * PCI/etc. bus probe sem.
4368 * 0 on success, AC_ERR_* mask otherwise.
4371 static unsigned int ata_dev_set_xfermode(struct ata_device *dev)
4373 struct ata_taskfile tf;
4374 unsigned int err_mask;
4376 /* set up set-features taskfile */
4377 DPRINTK("set features - xfer mode\n");
4379 /* Some controllers and ATAPI devices show flaky interrupt
4380 * behavior after setting xfer mode. Use polling instead.
4382 ata_tf_init(dev, &tf);
4383 tf.command = ATA_CMD_SET_FEATURES;
4384 tf.feature = SETFEATURES_XFER;
4385 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_POLLING;
4386 tf.protocol = ATA_PROT_NODATA;
4387 /* If we are using IORDY we must send the mode setting command */
4388 if (ata_pio_need_iordy(dev))
4389 tf.nsect = dev->xfer_mode;
4390 /* If the device has IORDY and the controller does not - turn it off */
4391 else if (ata_id_has_iordy(dev->id))
4393 else /* In the ancient relic department - skip all of this */
4396 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
4398 DPRINTK("EXIT, err_mask=%x\n", err_mask);
4402 * ata_dev_set_feature - Issue SET FEATURES - SATA FEATURES
4403 * @dev: Device to which command will be sent
4404 * @enable: Whether to enable or disable the feature
4405 * @feature: The sector count represents the feature to set
4407 * Issue SET FEATURES - SATA FEATURES command to device @dev
4408 * on port @ap with sector count
4411 * PCI/etc. bus probe sem.
4414 * 0 on success, AC_ERR_* mask otherwise.
4416 static unsigned int ata_dev_set_feature(struct ata_device *dev, u8 enable,
4419 struct ata_taskfile tf;
4420 unsigned int err_mask;
4422 /* set up set-features taskfile */
4423 DPRINTK("set features - SATA features\n");
4425 ata_tf_init(dev, &tf);
4426 tf.command = ATA_CMD_SET_FEATURES;
4427 tf.feature = enable;
4428 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
4429 tf.protocol = ATA_PROT_NODATA;
4432 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
4434 DPRINTK("EXIT, err_mask=%x\n", err_mask);
4439 * ata_dev_init_params - Issue INIT DEV PARAMS command
4440 * @dev: Device to which command will be sent
4441 * @heads: Number of heads (taskfile parameter)
4442 * @sectors: Number of sectors (taskfile parameter)
4445 * Kernel thread context (may sleep)
4448 * 0 on success, AC_ERR_* mask otherwise.
4450 static unsigned int ata_dev_init_params(struct ata_device *dev,
4451 u16 heads, u16 sectors)
4453 struct ata_taskfile tf;
4454 unsigned int err_mask;
4456 /* Number of sectors per track 1-255. Number of heads 1-16 */
4457 if (sectors < 1 || sectors > 255 || heads < 1 || heads > 16)
4458 return AC_ERR_INVALID;
4460 /* set up init dev params taskfile */
4461 DPRINTK("init dev params \n");
4463 ata_tf_init(dev, &tf);
4464 tf.command = ATA_CMD_INIT_DEV_PARAMS;
4465 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
4466 tf.protocol = ATA_PROT_NODATA;
4468 tf.device |= (heads - 1) & 0x0f; /* max head = num. of heads - 1 */
4470 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
4471 /* A clean abort indicates an original or just out of spec drive
4472 and we should continue as we issue the setup based on the
4473 drive reported working geometry */
4474 if (err_mask == AC_ERR_DEV && (tf.feature & ATA_ABORTED))
4477 DPRINTK("EXIT, err_mask=%x\n", err_mask);
4482 * ata_sg_clean - Unmap DMA memory associated with command
4483 * @qc: Command containing DMA memory to be released
4485 * Unmap all mapped DMA memory associated with this command.
4488 * spin_lock_irqsave(host lock)
4490 void ata_sg_clean(struct ata_queued_cmd *qc)
4492 struct ata_port *ap = qc->ap;
4493 struct scatterlist *sg = qc->sg;
4494 int dir = qc->dma_dir;
4495 void *pad_buf = NULL;
4497 WARN_ON(sg == NULL);
4499 VPRINTK("unmapping %u sg elements\n", qc->mapped_n_elem);
4501 /* if we padded the buffer out to 32-bit bound, and data
4502 * xfer direction is from-device, we must copy from the
4503 * pad buffer back into the supplied buffer
4505 if (qc->pad_len && !(qc->tf.flags & ATA_TFLAG_WRITE))
4506 pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ);
4508 if (qc->mapped_n_elem)
4509 dma_unmap_sg(ap->dev, sg, qc->mapped_n_elem, dir);
4510 /* restore last sg */
4512 *qc->last_sg = qc->saved_last_sg;
4514 struct scatterlist *psg = &qc->extra_sg[1];
4515 void *addr = kmap_atomic(sg_page(psg), KM_IRQ0);
4516 memcpy(addr + psg->offset, pad_buf, qc->pad_len);
4517 kunmap_atomic(addr, KM_IRQ0);
4520 qc->flags &= ~ATA_QCFLAG_DMAMAP;
4525 * ata_fill_sg - Fill PCI IDE PRD table
4526 * @qc: Metadata associated with taskfile to be transferred
4528 * Fill PCI IDE PRD (scatter-gather) table with segments
4529 * associated with the current disk command.
4532 * spin_lock_irqsave(host lock)
4535 static void ata_fill_sg(struct ata_queued_cmd *qc)
4537 struct ata_port *ap = qc->ap;
4538 struct scatterlist *sg;
4539 unsigned int si, pi;
4542 for_each_sg(qc->sg, sg, qc->n_elem, si) {
4546 /* determine if physical DMA addr spans 64K boundary.
4547 * Note h/w doesn't support 64-bit, so we unconditionally
4548 * truncate dma_addr_t to u32.
4550 addr = (u32) sg_dma_address(sg);
4551 sg_len = sg_dma_len(sg);
4554 offset = addr & 0xffff;
4556 if ((offset + sg_len) > 0x10000)
4557 len = 0x10000 - offset;
4559 ap->prd[pi].addr = cpu_to_le32(addr);
4560 ap->prd[pi].flags_len = cpu_to_le32(len & 0xffff);
4561 VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", pi, addr, len);
4569 ap->prd[pi - 1].flags_len |= cpu_to_le32(ATA_PRD_EOT);
4573 * ata_fill_sg_dumb - Fill PCI IDE PRD table
4574 * @qc: Metadata associated with taskfile to be transferred
4576 * Fill PCI IDE PRD (scatter-gather) table with segments
4577 * associated with the current disk command. Perform the fill
4578 * so that we avoid writing any length 64K records for
4579 * controllers that don't follow the spec.
4582 * spin_lock_irqsave(host lock)
4585 static void ata_fill_sg_dumb(struct ata_queued_cmd *qc)
4587 struct ata_port *ap = qc->ap;
4588 struct scatterlist *sg;
4589 unsigned int si, pi;
4592 for_each_sg(qc->sg, sg, qc->n_elem, si) {
4594 u32 sg_len, len, blen;
4596 /* determine if physical DMA addr spans 64K boundary.
4597 * Note h/w doesn't support 64-bit, so we unconditionally
4598 * truncate dma_addr_t to u32.
4600 addr = (u32) sg_dma_address(sg);
4601 sg_len = sg_dma_len(sg);
4604 offset = addr & 0xffff;
4606 if ((offset + sg_len) > 0x10000)
4607 len = 0x10000 - offset;
4609 blen = len & 0xffff;
4610 ap->prd[pi].addr = cpu_to_le32(addr);
4612 /* Some PATA chipsets like the CS5530 can't
4613 cope with 0x0000 meaning 64K as the spec says */
4614 ap->prd[pi].flags_len = cpu_to_le32(0x8000);
4616 ap->prd[++pi].addr = cpu_to_le32(addr + 0x8000);
4618 ap->prd[pi].flags_len = cpu_to_le32(blen);
4619 VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", pi, addr, len);
4627 ap->prd[pi - 1].flags_len |= cpu_to_le32(ATA_PRD_EOT);
4631 * ata_check_atapi_dma - Check whether ATAPI DMA can be supported
4632 * @qc: Metadata associated with taskfile to check
4634 * Allow low-level driver to filter ATA PACKET commands, returning
4635 * a status indicating whether or not it is OK to use DMA for the
4636 * supplied PACKET command.
4639 * spin_lock_irqsave(host lock)
4641 * RETURNS: 0 when ATAPI DMA can be used
4644 int ata_check_atapi_dma(struct ata_queued_cmd *qc)
4646 struct ata_port *ap = qc->ap;
4648 /* Don't allow DMA if it isn't multiple of 16 bytes. Quite a
4649 * few ATAPI devices choke on such DMA requests.
4651 if (unlikely(qc->nbytes & 15))
4654 if (ap->ops->check_atapi_dma)
4655 return ap->ops->check_atapi_dma(qc);
4661 * atapi_qc_may_overflow - Check whether data transfer may overflow
4662 * @qc: ATA command in question
4664 * ATAPI commands which transfer variable length data to host
4665 * might overflow due to application error or hardare bug. This
4666 * function checks whether overflow should be drained and ignored
4673 * 1 if @qc may overflow; otherwise, 0.
4675 static int atapi_qc_may_overflow(struct ata_queued_cmd *qc)
4677 if (qc->tf.protocol != ATAPI_PROT_PIO &&
4678 qc->tf.protocol != ATAPI_PROT_DMA)
4681 if (qc->tf.flags & ATA_TFLAG_WRITE)
4684 switch (qc->cdb[0]) {
4690 case GPCMD_READ_CD_MSF:
4698 * ata_std_qc_defer - Check whether a qc needs to be deferred
4699 * @qc: ATA command in question
4701 * Non-NCQ commands cannot run with any other command, NCQ or
4702 * not. As upper layer only knows the queue depth, we are
4703 * responsible for maintaining exclusion. This function checks
4704 * whether a new command @qc can be issued.
4707 * spin_lock_irqsave(host lock)
4710 * ATA_DEFER_* if deferring is needed, 0 otherwise.
4712 int ata_std_qc_defer(struct ata_queued_cmd *qc)
4714 struct ata_link *link = qc->dev->link;
4716 if (qc->tf.protocol == ATA_PROT_NCQ) {
4717 if (!ata_tag_valid(link->active_tag))
4720 if (!ata_tag_valid(link->active_tag) && !link->sactive)
4724 return ATA_DEFER_LINK;
4728 * ata_qc_prep - Prepare taskfile for submission
4729 * @qc: Metadata associated with taskfile to be prepared
4731 * Prepare ATA taskfile for submission.
4734 * spin_lock_irqsave(host lock)
4736 void ata_qc_prep(struct ata_queued_cmd *qc)
4738 if (!(qc->flags & ATA_QCFLAG_DMAMAP))
4745 * ata_dumb_qc_prep - Prepare taskfile for submission
4746 * @qc: Metadata associated with taskfile to be prepared
4748 * Prepare ATA taskfile for submission.
4751 * spin_lock_irqsave(host lock)
4753 void ata_dumb_qc_prep(struct ata_queued_cmd *qc)
4755 if (!(qc->flags & ATA_QCFLAG_DMAMAP))
4758 ata_fill_sg_dumb(qc);
4761 void ata_noop_qc_prep(struct ata_queued_cmd *qc) { }
4764 * ata_sg_init - Associate command with scatter-gather table.
4765 * @qc: Command to be associated
4766 * @sg: Scatter-gather table.
4767 * @n_elem: Number of elements in s/g table.
4769 * Initialize the data-related elements of queued_cmd @qc
4770 * to point to a scatter-gather table @sg, containing @n_elem
4774 * spin_lock_irqsave(host lock)
4776 void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
4777 unsigned int n_elem)
4780 qc->n_elem = n_elem;
4784 static unsigned int ata_sg_setup_extra(struct ata_queued_cmd *qc,
4785 unsigned int *n_elem_extra,
4786 unsigned int *nbytes_extra)
4788 struct ata_port *ap = qc->ap;
4789 unsigned int n_elem = qc->n_elem;
4790 struct scatterlist *lsg, *copy_lsg = NULL, *tsg = NULL, *esg = NULL;
4795 /* needs padding? */
4796 qc->pad_len = qc->nbytes & 3;
4798 if (likely(!qc->pad_len))
4801 /* locate last sg and save it */
4802 lsg = sg_last(qc->sg, n_elem);
4804 qc->saved_last_sg = *lsg;
4806 sg_init_table(qc->extra_sg, ARRAY_SIZE(qc->extra_sg));
4809 struct scatterlist *psg = &qc->extra_sg[1];
4810 void *pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ);
4811 unsigned int offset;
4813 WARN_ON(qc->dev->class != ATA_DEV_ATAPI);
4815 memset(pad_buf, 0, ATA_DMA_PAD_SZ);
4817 /* psg->page/offset are used to copy to-be-written
4818 * data in this function or read data in ata_sg_clean.
4820 offset = lsg->offset + lsg->length - qc->pad_len;
4821 sg_set_page(psg, nth_page(sg_page(lsg), offset >> PAGE_SHIFT),
4822 qc->pad_len, offset_in_page(offset));
4824 if (qc->tf.flags & ATA_TFLAG_WRITE) {
4825 void *addr = kmap_atomic(sg_page(psg), KM_IRQ0);
4826 memcpy(pad_buf, addr + psg->offset, qc->pad_len);
4827 kunmap_atomic(addr, KM_IRQ0);
4830 sg_dma_address(psg) = ap->pad_dma + (qc->tag * ATA_DMA_PAD_SZ);
4831 sg_dma_len(psg) = ATA_DMA_PAD_SZ;
4833 /* Trim the last sg entry and chain the original and
4836 * Because chaining consumes one sg entry, one extra
4837 * sg entry is allocated and the last sg entry is
4838 * copied to it if the length isn't zero after padded
4839 * amount is removed.
4841 * If the last sg entry is completely replaced by
4842 * padding sg entry, the first sg entry is skipped
4845 lsg->length -= qc->pad_len;
4847 copy_lsg = &qc->extra_sg[0];
4848 tsg = &qc->extra_sg[0];
4851 tsg = &qc->extra_sg[1];
4854 esg = &qc->extra_sg[1];
4857 (*nbytes_extra) += 4 - qc->pad_len;
4861 sg_set_page(copy_lsg, sg_page(lsg), lsg->length, lsg->offset);
4863 sg_chain(lsg, 1, tsg);
4866 /* sglist can't start with chaining sg entry, fast forward */
4867 if (qc->sg == lsg) {
4876 * ata_sg_setup - DMA-map the scatter-gather table associated with a command.
4877 * @qc: Command with scatter-gather table to be mapped.
4879 * DMA-map the scatter-gather table associated with queued_cmd @qc.
4882 * spin_lock_irqsave(host lock)
4885 * Zero on success, negative on error.
4888 static int ata_sg_setup(struct ata_queued_cmd *qc)
4890 struct ata_port *ap = qc->ap;
4891 unsigned int n_elem, n_elem_extra, nbytes_extra;
4893 VPRINTK("ENTER, ata%u\n", ap->print_id);
4895 n_elem = ata_sg_setup_extra(qc, &n_elem_extra, &nbytes_extra);
4898 n_elem = dma_map_sg(ap->dev, qc->sg, n_elem, qc->dma_dir);
4900 /* restore last sg */
4902 *qc->last_sg = qc->saved_last_sg;
4905 DPRINTK("%d sg elements mapped\n", n_elem);
4908 qc->n_elem = qc->mapped_n_elem = n_elem;
4909 qc->n_elem += n_elem_extra;
4910 qc->nbytes += nbytes_extra;
4911 qc->flags |= ATA_QCFLAG_DMAMAP;
4917 * swap_buf_le16 - swap halves of 16-bit words in place
4918 * @buf: Buffer to swap
4919 * @buf_words: Number of 16-bit words in buffer.
4921 * Swap halves of 16-bit words if needed to convert from
4922 * little-endian byte order to native cpu byte order, or
4926 * Inherited from caller.
4928 void swap_buf_le16(u16 *buf, unsigned int buf_words)
4933 for (i = 0; i < buf_words; i++)
4934 buf[i] = le16_to_cpu(buf[i]);
4935 #endif /* __BIG_ENDIAN */
4939 * ata_data_xfer - Transfer data by PIO
4940 * @dev: device to target
4942 * @buflen: buffer length
4945 * Transfer data from/to the device data register by PIO.
4948 * Inherited from caller.
4953 unsigned int ata_data_xfer(struct ata_device *dev, unsigned char *buf,
4954 unsigned int buflen, int rw)
4956 struct ata_port *ap = dev->link->ap;
4957 void __iomem *data_addr = ap->ioaddr.data_addr;
4958 unsigned int words = buflen >> 1;
4960 /* Transfer multiple of 2 bytes */
4962 ioread16_rep(data_addr, buf, words);
4964 iowrite16_rep(data_addr, buf, words);
4966 /* Transfer trailing 1 byte, if any. */
4967 if (unlikely(buflen & 0x01)) {
4968 __le16 align_buf[1] = { 0 };
4969 unsigned char *trailing_buf = buf + buflen - 1;
4972 align_buf[0] = cpu_to_le16(ioread16(data_addr));
4973 memcpy(trailing_buf, align_buf, 1);
4975 memcpy(align_buf, trailing_buf, 1);
4976 iowrite16(le16_to_cpu(align_buf[0]), data_addr);
4985 * ata_data_xfer_noirq - Transfer data by PIO
4986 * @dev: device to target
4988 * @buflen: buffer length
4991 * Transfer data from/to the device data register by PIO. Do the
4992 * transfer with interrupts disabled.
4995 * Inherited from caller.
5000 unsigned int ata_data_xfer_noirq(struct ata_device *dev, unsigned char *buf,
5001 unsigned int buflen, int rw)
5003 unsigned long flags;
5004 unsigned int consumed;
5006 local_irq_save(flags);
5007 consumed = ata_data_xfer(dev, buf, buflen, rw);
5008 local_irq_restore(flags);
5015 * ata_pio_sector - Transfer a sector of data.
5016 * @qc: Command on going
5018 * Transfer qc->sect_size bytes of data from/to the ATA device.
5021 * Inherited from caller.
5024 static void ata_pio_sector(struct ata_queued_cmd *qc)
5026 int do_write = (qc->tf.flags & ATA_TFLAG_WRITE);
5027 struct ata_port *ap = qc->ap;
5029 unsigned int offset;
5032 if (qc->curbytes == qc->nbytes - qc->sect_size)
5033 ap->hsm_task_state = HSM_ST_LAST;
5035 page = sg_page(qc->cursg);
5036 offset = qc->cursg->offset + qc->cursg_ofs;
5038 /* get the current page and offset */
5039 page = nth_page(page, (offset >> PAGE_SHIFT));
5040 offset %= PAGE_SIZE;
5042 DPRINTK("data %s\n", qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read");
5044 if (PageHighMem(page)) {
5045 unsigned long flags;
5047 /* FIXME: use a bounce buffer */
5048 local_irq_save(flags);
5049 buf = kmap_atomic(page, KM_IRQ0);
5051 /* do the actual data transfer */
5052 ap->ops->data_xfer(qc->dev, buf + offset, qc->sect_size, do_write);
5054 kunmap_atomic(buf, KM_IRQ0);
5055 local_irq_restore(flags);
5057 buf = page_address(page);
5058 ap->ops->data_xfer(qc->dev, buf + offset, qc->sect_size, do_write);
5061 qc->curbytes += qc->sect_size;
5062 qc->cursg_ofs += qc->sect_size;
5064 if (qc->cursg_ofs == qc->cursg->length) {
5065 qc->cursg = sg_next(qc->cursg);
5071 * ata_pio_sectors - Transfer one or many sectors.
5072 * @qc: Command on going
5074 * Transfer one or many sectors of data from/to the
5075 * ATA device for the DRQ request.
5078 * Inherited from caller.
5081 static void ata_pio_sectors(struct ata_queued_cmd *qc)
5083 if (is_multi_taskfile(&qc->tf)) {
5084 /* READ/WRITE MULTIPLE */
5087 WARN_ON(qc->dev->multi_count == 0);
5089 nsect = min((qc->nbytes - qc->curbytes) / qc->sect_size,
5090 qc->dev->multi_count);
5096 ata_altstatus(qc->ap); /* flush */
5100 * atapi_send_cdb - Write CDB bytes to hardware
5101 * @ap: Port to which ATAPI device is attached.
5102 * @qc: Taskfile currently active
5104 * When device has indicated its readiness to accept
5105 * a CDB, this function is called. Send the CDB.
5111 static void atapi_send_cdb(struct ata_port *ap, struct ata_queued_cmd *qc)
5114 DPRINTK("send cdb\n");
5115 WARN_ON(qc->dev->cdb_len < 12);
5117 ap->ops->data_xfer(qc->dev, qc->cdb, qc->dev->cdb_len, 1);
5118 ata_altstatus(ap); /* flush */
5120 switch (qc->tf.protocol) {
5121 case ATAPI_PROT_PIO:
5122 ap->hsm_task_state = HSM_ST;
5124 case ATAPI_PROT_NODATA:
5125 ap->hsm_task_state = HSM_ST_LAST;
5127 case ATAPI_PROT_DMA:
5128 ap->hsm_task_state = HSM_ST_LAST;
5129 /* initiate bmdma */
5130 ap->ops->bmdma_start(qc);
5136 * __atapi_pio_bytes - Transfer data from/to the ATAPI device.
5137 * @qc: Command on going
5138 * @bytes: number of bytes
5140 * Transfer Transfer data from/to the ATAPI device.
5143 * Inherited from caller.
5146 static int __atapi_pio_bytes(struct ata_queued_cmd *qc, unsigned int bytes)
5148 int do_write = (qc->tf.flags & ATA_TFLAG_WRITE);
5149 struct ata_port *ap = qc->ap;
5150 struct ata_eh_info *ehi = &qc->dev->link->eh_info;
5151 struct scatterlist *sg;
5154 unsigned int offset, count;
5158 if (unlikely(!sg)) {
5160 * The end of qc->sg is reached and the device expects
5161 * more data to transfer. In order not to overrun qc->sg
5162 * and fulfill length specified in the byte count register,
5163 * - for read case, discard trailing data from the device
5164 * - for write case, padding zero data to the device
5166 u16 pad_buf[1] = { 0 };
5169 if (bytes > qc->curbytes - qc->nbytes + ATAPI_MAX_DRAIN) {
5170 ata_ehi_push_desc(ehi, "too much trailing data "
5171 "buf=%u cur=%u bytes=%u",
5172 qc->nbytes, qc->curbytes, bytes);
5176 /* overflow is exptected for misc ATAPI commands */
5177 if (bytes && !atapi_qc_may_overflow(qc))
5178 ata_dev_printk(qc->dev, KERN_WARNING, "ATAPI %u bytes "
5179 "trailing data (cdb=%02x nbytes=%u)\n",
5180 bytes, qc->cdb[0], qc->nbytes);
5182 for (i = 0; i < (bytes + 1) / 2; i++)
5183 ap->ops->data_xfer(qc->dev, (unsigned char *)pad_buf, 2, do_write);
5185 qc->curbytes += bytes;
5191 offset = sg->offset + qc->cursg_ofs;
5193 /* get the current page and offset */
5194 page = nth_page(page, (offset >> PAGE_SHIFT));
5195 offset %= PAGE_SIZE;
5197 /* don't overrun current sg */
5198 count = min(sg->length - qc->cursg_ofs, bytes);
5200 /* don't cross page boundaries */
5201 count = min(count, (unsigned int)PAGE_SIZE - offset);
5203 DPRINTK("data %s\n", qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read");
5205 if (PageHighMem(page)) {
5206 unsigned long flags;
5208 /* FIXME: use bounce buffer */
5209 local_irq_save(flags);
5210 buf = kmap_atomic(page, KM_IRQ0);
5212 /* do the actual data transfer */
5213 ap->ops->data_xfer(qc->dev, buf + offset, count, do_write);
5215 kunmap_atomic(buf, KM_IRQ0);
5216 local_irq_restore(flags);
5218 buf = page_address(page);
5219 ap->ops->data_xfer(qc->dev, buf + offset, count, do_write);
5223 if ((count & 1) && bytes)
5225 qc->curbytes += count;
5226 qc->cursg_ofs += count;
5228 if (qc->cursg_ofs == sg->length) {
5229 qc->cursg = sg_next(qc->cursg);
5240 * atapi_pio_bytes - Transfer data from/to the ATAPI device.
5241 * @qc: Command on going
5243 * Transfer Transfer data from/to the ATAPI device.
5246 * Inherited from caller.
5249 static void atapi_pio_bytes(struct ata_queued_cmd *qc)
5251 struct ata_port *ap = qc->ap;
5252 struct ata_device *dev = qc->dev;
5253 unsigned int ireason, bc_lo, bc_hi, bytes;
5254 int i_write, do_write = (qc->tf.flags & ATA_TFLAG_WRITE) ? 1 : 0;
5256 /* Abuse qc->result_tf for temp storage of intermediate TF
5257 * here to save some kernel stack usage.
5258 * For normal completion, qc->result_tf is not relevant. For
5259 * error, qc->result_tf is later overwritten by ata_qc_complete().
5260 * So, the correctness of qc->result_tf is not affected.
5262 ap->ops->tf_read(ap, &qc->result_tf);
5263 ireason = qc->result_tf.nsect;
5264 bc_lo = qc->result_tf.lbam;
5265 bc_hi = qc->result_tf.lbah;
5266 bytes = (bc_hi << 8) | bc_lo;
5268 /* shall be cleared to zero, indicating xfer of data */
5269 if (unlikely(ireason & (1 << 0)))
5272 /* make sure transfer direction matches expected */
5273 i_write = ((ireason & (1 << 1)) == 0) ? 1 : 0;
5274 if (unlikely(do_write != i_write))
5277 if (unlikely(!bytes))
5280 VPRINTK("ata%u: xfering %d bytes\n", ap->print_id, bytes);
5282 if (__atapi_pio_bytes(qc, bytes))
5284 ata_altstatus(ap); /* flush */
5289 ata_dev_printk(dev, KERN_INFO, "ATAPI check failed\n");
5290 qc->err_mask |= AC_ERR_HSM;
5291 ap->hsm_task_state = HSM_ST_ERR;
5295 * ata_hsm_ok_in_wq - Check if the qc can be handled in the workqueue.
5296 * @ap: the target ata_port
5300 * 1 if ok in workqueue, 0 otherwise.
5303 static inline int ata_hsm_ok_in_wq(struct ata_port *ap, struct ata_queued_cmd *qc)
5305 if (qc->tf.flags & ATA_TFLAG_POLLING)
5308 if (ap->hsm_task_state == HSM_ST_FIRST) {
5309 if (qc->tf.protocol == ATA_PROT_PIO &&
5310 (qc->tf.flags & ATA_TFLAG_WRITE))
5313 if (ata_is_atapi(qc->tf.protocol) &&
5314 !(qc->dev->flags & ATA_DFLAG_CDB_INTR))
5322 * ata_hsm_qc_complete - finish a qc running on standard HSM
5323 * @qc: Command to complete
5324 * @in_wq: 1 if called from workqueue, 0 otherwise
5326 * Finish @qc which is running on standard HSM.
5329 * If @in_wq is zero, spin_lock_irqsave(host lock).
5330 * Otherwise, none on entry and grabs host lock.
5332 static void ata_hsm_qc_complete(struct ata_queued_cmd *qc, int in_wq)
5334 struct ata_port *ap = qc->ap;
5335 unsigned long flags;
5337 if (ap->ops->error_handler) {
5339 spin_lock_irqsave(ap->lock, flags);
5341 /* EH might have kicked in while host lock is
5344 qc = ata_qc_from_tag(ap, qc->tag);
5346 if (likely(!(qc->err_mask & AC_ERR_HSM))) {
5347 ap->ops->irq_on(ap);
5348 ata_qc_complete(qc);
5350 ata_port_freeze(ap);
5353 spin_unlock_irqrestore(ap->lock, flags);
5355 if (likely(!(qc->err_mask & AC_ERR_HSM)))
5356 ata_qc_complete(qc);
5358 ata_port_freeze(ap);
5362 spin_lock_irqsave(ap->lock, flags);
5363 ap->ops->irq_on(ap);
5364 ata_qc_complete(qc);
5365 spin_unlock_irqrestore(ap->lock, flags);
5367 ata_qc_complete(qc);
5372 * ata_hsm_move - move the HSM to the next state.
5373 * @ap: the target ata_port
5375 * @status: current device status
5376 * @in_wq: 1 if called from workqueue, 0 otherwise
5379 * 1 when poll next status needed, 0 otherwise.
5381 int ata_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc,
5382 u8 status, int in_wq)
5384 unsigned long flags = 0;
5387 WARN_ON((qc->flags & ATA_QCFLAG_ACTIVE) == 0);
5389 /* Make sure ata_qc_issue_prot() does not throw things
5390 * like DMA polling into the workqueue. Notice that
5391 * in_wq is not equivalent to (qc->tf.flags & ATA_TFLAG_POLLING).
5393 WARN_ON(in_wq != ata_hsm_ok_in_wq(ap, qc));
5396 DPRINTK("ata%u: protocol %d task_state %d (dev_stat 0x%X)\n",
5397 ap->print_id, qc->tf.protocol, ap->hsm_task_state, status);
5399 switch (ap->hsm_task_state) {
5401 /* Send first data block or PACKET CDB */
5403 /* If polling, we will stay in the work queue after
5404 * sending the data. Otherwise, interrupt handler
5405 * takes over after sending the data.
5407 poll_next = (qc->tf.flags & ATA_TFLAG_POLLING);
5409 /* check device status */
5410 if (unlikely((status & ATA_DRQ) == 0)) {
5411 /* handle BSY=0, DRQ=0 as error */
5412 if (likely(status & (ATA_ERR | ATA_DF)))
5413 /* device stops HSM for abort/error */
5414 qc->err_mask |= AC_ERR_DEV;
5416 /* HSM violation. Let EH handle this */
5417 qc->err_mask |= AC_ERR_HSM;
5419 ap->hsm_task_state = HSM_ST_ERR;
5423 /* Device should not ask for data transfer (DRQ=1)
5424 * when it finds something wrong.
5425 * We ignore DRQ here and stop the HSM by
5426 * changing hsm_task_state to HSM_ST_ERR and
5427 * let the EH abort the command or reset the device.
5429 if (unlikely(status & (ATA_ERR | ATA_DF))) {
5430 /* Some ATAPI tape drives forget to clear the ERR bit
5431 * when doing the next command (mostly request sense).
5432 * We ignore ERR here to workaround and proceed sending
5435 if (!(qc->dev->horkage & ATA_HORKAGE_STUCK_ERR)) {
5436 ata_port_printk(ap, KERN_WARNING,
5437 "DRQ=1 with device error, "
5438 "dev_stat 0x%X\n", status);
5439 qc->err_mask |= AC_ERR_HSM;
5440 ap->hsm_task_state = HSM_ST_ERR;
5445 /* Send the CDB (atapi) or the first data block (ata pio out).
5446 * During the state transition, interrupt handler shouldn't
5447 * be invoked before the data transfer is complete and
5448 * hsm_task_state is changed. Hence, the following locking.
5451 spin_lock_irqsave(ap->lock, flags);
5453 if (qc->tf.protocol == ATA_PROT_PIO) {
5454 /* PIO data out protocol.
5455 * send first data block.
5458 /* ata_pio_sectors() might change the state
5459 * to HSM_ST_LAST. so, the state is changed here
5460 * before ata_pio_sectors().
5462 ap->hsm_task_state = HSM_ST;
5463 ata_pio_sectors(qc);
5466 atapi_send_cdb(ap, qc);
5469 spin_unlock_irqrestore(ap->lock, flags);
5471 /* if polling, ata_pio_task() handles the rest.
5472 * otherwise, interrupt handler takes over from here.
5477 /* complete command or read/write the data register */
5478 if (qc->tf.protocol == ATAPI_PROT_PIO) {
5479 /* ATAPI PIO protocol */
5480 if ((status & ATA_DRQ) == 0) {
5481 /* No more data to transfer or device error.
5482 * Device error will be tagged in HSM_ST_LAST.
5484 ap->hsm_task_state = HSM_ST_LAST;
5488 /* Device should not ask for data transfer (DRQ=1)
5489 * when it finds something wrong.
5490 * We ignore DRQ here and stop the HSM by
5491 * changing hsm_task_state to HSM_ST_ERR and
5492 * let the EH abort the command or reset the device.
5494 if (unlikely(status & (ATA_ERR | ATA_DF))) {
5495 ata_port_printk(ap, KERN_WARNING, "DRQ=1 with "
5496 "device error, dev_stat 0x%X\n",
5498 qc->err_mask |= AC_ERR_HSM;
5499 ap->hsm_task_state = HSM_ST_ERR;
5503 atapi_pio_bytes(qc);
5505 if (unlikely(ap->hsm_task_state == HSM_ST_ERR))
5506 /* bad ireason reported by device */
5510 /* ATA PIO protocol */
5511 if (unlikely((status & ATA_DRQ) == 0)) {
5512 /* handle BSY=0, DRQ=0 as error */
5513 if (likely(status & (ATA_ERR | ATA_DF)))
5514 /* device stops HSM for abort/error */
5515 qc->err_mask |= AC_ERR_DEV;
5517 /* HSM violation. Let EH handle this.
5518 * Phantom devices also trigger this
5519 * condition. Mark hint.
5521 qc->err_mask |= AC_ERR_HSM |
5524 ap->hsm_task_state = HSM_ST_ERR;
5528 /* For PIO reads, some devices may ask for
5529 * data transfer (DRQ=1) alone with ERR=1.
5530 * We respect DRQ here and transfer one
5531 * block of junk data before changing the
5532 * hsm_task_state to HSM_ST_ERR.
5534 * For PIO writes, ERR=1 DRQ=1 doesn't make
5535 * sense since the data block has been
5536 * transferred to the device.
5538 if (unlikely(status & (ATA_ERR | ATA_DF))) {
5539 /* data might be corrputed */
5540 qc->err_mask |= AC_ERR_DEV;
5542 if (!(qc->tf.flags & ATA_TFLAG_WRITE)) {
5543 ata_pio_sectors(qc);
5544 status = ata_wait_idle(ap);
5547 if (status & (ATA_BUSY | ATA_DRQ))
5548 qc->err_mask |= AC_ERR_HSM;
5550 /* ata_pio_sectors() might change the
5551 * state to HSM_ST_LAST. so, the state
5552 * is changed after ata_pio_sectors().
5554 ap->hsm_task_state = HSM_ST_ERR;
5558 ata_pio_sectors(qc);
5560 if (ap->hsm_task_state == HSM_ST_LAST &&
5561 (!(qc->tf.flags & ATA_TFLAG_WRITE))) {
5563 status = ata_wait_idle(ap);
5572 if (unlikely(!ata_ok(status))) {
5573 qc->err_mask |= __ac_err_mask(status);
5574 ap->hsm_task_state = HSM_ST_ERR;
5578 /* no more data to transfer */
5579 DPRINTK("ata%u: dev %u command complete, drv_stat 0x%x\n",
5580 ap->print_id, qc->dev->devno, status);
5582 WARN_ON(qc->err_mask);
5584 ap->hsm_task_state = HSM_ST_IDLE;
5586 /* complete taskfile transaction */
5587 ata_hsm_qc_complete(qc, in_wq);
5593 /* make sure qc->err_mask is available to
5594 * know what's wrong and recover
5596 WARN_ON(qc->err_mask == 0);
5598 ap->hsm_task_state = HSM_ST_IDLE;
5600 /* complete taskfile transaction */
5601 ata_hsm_qc_complete(qc, in_wq);
5613 static void ata_pio_task(struct work_struct *work)
5615 struct ata_port *ap =
5616 container_of(work, struct ata_port, port_task.work);
5617 struct ata_queued_cmd *qc = ap->port_task_data;
5622 WARN_ON(ap->hsm_task_state == HSM_ST_IDLE);
5625 * This is purely heuristic. This is a fast path.
5626 * Sometimes when we enter, BSY will be cleared in
5627 * a chk-status or two. If not, the drive is probably seeking
5628 * or something. Snooze for a couple msecs, then
5629 * chk-status again. If still busy, queue delayed work.
5631 status = ata_busy_wait(ap, ATA_BUSY, 5);
5632 if (status & ATA_BUSY) {
5634 status = ata_busy_wait(ap, ATA_BUSY, 10);
5635 if (status & ATA_BUSY) {
5636 ata_pio_queue_task(ap, qc, ATA_SHORT_PAUSE);
5642 poll_next = ata_hsm_move(ap, qc, status, 1);
5644 /* another command or interrupt handler
5645 * may be running at this point.
5652 * ata_qc_new - Request an available ATA command, for queueing
5653 * @ap: Port associated with device @dev
5654 * @dev: Device from whom we request an available command structure
5660 static struct ata_queued_cmd *ata_qc_new(struct ata_port *ap)
5662 struct ata_queued_cmd *qc = NULL;
5665 /* no command while frozen */
5666 if (unlikely(ap->pflags & ATA_PFLAG_FROZEN))
5669 /* the last tag is reserved for internal command. */
5670 for (i = 0; i < ATA_MAX_QUEUE - 1; i++)
5671 if (!test_and_set_bit(i, &ap->qc_allocated)) {
5672 qc = __ata_qc_from_tag(ap, i);
5683 * ata_qc_new_init - Request an available ATA command, and initialize it
5684 * @dev: Device from whom we request an available command structure
5690 struct ata_queued_cmd *ata_qc_new_init(struct ata_device *dev)
5692 struct ata_port *ap = dev->link->ap;
5693 struct ata_queued_cmd *qc;
5695 qc = ata_qc_new(ap);
5708 * ata_qc_free - free unused ata_queued_cmd
5709 * @qc: Command to complete
5711 * Designed to free unused ata_queued_cmd object
5712 * in case something prevents using it.
5715 * spin_lock_irqsave(host lock)
5717 void ata_qc_free(struct ata_queued_cmd *qc)
5719 struct ata_port *ap = qc->ap;
5722 WARN_ON(qc == NULL); /* ata_qc_from_tag _might_ return NULL */
5726 if (likely(ata_tag_valid(tag))) {
5727 qc->tag = ATA_TAG_POISON;
5728 clear_bit(tag, &ap->qc_allocated);
5732 void __ata_qc_complete(struct ata_queued_cmd *qc)
5734 struct ata_port *ap = qc->ap;
5735 struct ata_link *link = qc->dev->link;
5737 WARN_ON(qc == NULL); /* ata_qc_from_tag _might_ return NULL */
5738 WARN_ON(!(qc->flags & ATA_QCFLAG_ACTIVE));
5740 if (likely(qc->flags & ATA_QCFLAG_DMAMAP))
5743 /* command should be marked inactive atomically with qc completion */
5744 if (qc->tf.protocol == ATA_PROT_NCQ) {
5745 link->sactive &= ~(1 << qc->tag);
5747 ap->nr_active_links--;
5749 link->active_tag = ATA_TAG_POISON;
5750 ap->nr_active_links--;
5753 /* clear exclusive status */
5754 if (unlikely(qc->flags & ATA_QCFLAG_CLEAR_EXCL &&
5755 ap->excl_link == link))
5756 ap->excl_link = NULL;
5758 /* atapi: mark qc as inactive to prevent the interrupt handler
5759 * from completing the command twice later, before the error handler
5760 * is called. (when rc != 0 and atapi request sense is needed)
5762 qc->flags &= ~ATA_QCFLAG_ACTIVE;
5763 ap->qc_active &= ~(1 << qc->tag);
5765 /* call completion callback */
5766 qc->complete_fn(qc);
5769 static void fill_result_tf(struct ata_queued_cmd *qc)
5771 struct ata_port *ap = qc->ap;
5773 qc->result_tf.flags = qc->tf.flags;
5774 ap->ops->tf_read(ap, &qc->result_tf);
5777 static void ata_verify_xfer(struct ata_queued_cmd *qc)
5779 struct ata_device *dev = qc->dev;
5781 if (ata_tag_internal(qc->tag))
5784 if (ata_is_nodata(qc->tf.protocol))
5787 if ((dev->mwdma_mask || dev->udma_mask) && ata_is_pio(qc->tf.protocol))
5790 dev->flags &= ~ATA_DFLAG_DUBIOUS_XFER;
5794 * ata_qc_complete - Complete an active ATA command
5795 * @qc: Command to complete
5796 * @err_mask: ATA Status register contents
5798 * Indicate to the mid and upper layers that an ATA
5799 * command has completed, with either an ok or not-ok status.
5802 * spin_lock_irqsave(host lock)
5804 void ata_qc_complete(struct ata_queued_cmd *qc)
5806 struct ata_port *ap = qc->ap;
5808 /* XXX: New EH and old EH use different mechanisms to
5809 * synchronize EH with regular execution path.
5811 * In new EH, a failed qc is marked with ATA_QCFLAG_FAILED.
5812 * Normal execution path is responsible for not accessing a
5813 * failed qc. libata core enforces the rule by returning NULL
5814 * from ata_qc_from_tag() for failed qcs.
5816 * Old EH depends on ata_qc_complete() nullifying completion
5817 * requests if ATA_QCFLAG_EH_SCHEDULED is set. Old EH does
5818 * not synchronize with interrupt handler. Only PIO task is
5821 if (ap->ops->error_handler) {
5822 struct ata_device *dev = qc->dev;
5823 struct ata_eh_info *ehi = &dev->link->eh_info;
5825 WARN_ON(ap->pflags & ATA_PFLAG_FROZEN);
5827 if (unlikely(qc->err_mask))
5828 qc->flags |= ATA_QCFLAG_FAILED;
5830 if (unlikely(qc->flags & ATA_QCFLAG_FAILED)) {
5831 if (!ata_tag_internal(qc->tag)) {
5832 /* always fill result TF for failed qc */
5834 ata_qc_schedule_eh(qc);
5839 /* read result TF if requested */
5840 if (qc->flags & ATA_QCFLAG_RESULT_TF)
5843 /* Some commands need post-processing after successful
5846 switch (qc->tf.command) {
5847 case ATA_CMD_SET_FEATURES:
5848 if (qc->tf.feature != SETFEATURES_WC_ON &&
5849 qc->tf.feature != SETFEATURES_WC_OFF)
5852 case ATA_CMD_INIT_DEV_PARAMS: /* CHS translation changed */
5853 case ATA_CMD_SET_MULTI: /* multi_count changed */
5854 /* revalidate device */
5855 ehi->dev_action[dev->devno] |= ATA_EH_REVALIDATE;
5856 ata_port_schedule_eh(ap);
5860 dev->flags |= ATA_DFLAG_SLEEPING;
5864 if (unlikely(dev->flags & ATA_DFLAG_DUBIOUS_XFER))
5865 ata_verify_xfer(qc);
5867 __ata_qc_complete(qc);
5869 if (qc->flags & ATA_QCFLAG_EH_SCHEDULED)
5872 /* read result TF if failed or requested */
5873 if (qc->err_mask || qc->flags & ATA_QCFLAG_RESULT_TF)
5876 __ata_qc_complete(qc);
5881 * ata_qc_complete_multiple - Complete multiple qcs successfully
5882 * @ap: port in question
5883 * @qc_active: new qc_active mask
5884 * @finish_qc: LLDD callback invoked before completing a qc
5886 * Complete in-flight commands. This functions is meant to be
5887 * called from low-level driver's interrupt routine to complete
5888 * requests normally. ap->qc_active and @qc_active is compared
5889 * and commands are completed accordingly.
5892 * spin_lock_irqsave(host lock)
5895 * Number of completed commands on success, -errno otherwise.
5897 int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active,
5898 void (*finish_qc)(struct ata_queued_cmd *))
5904 done_mask = ap->qc_active ^ qc_active;
5906 if (unlikely(done_mask & qc_active)) {
5907 ata_port_printk(ap, KERN_ERR, "illegal qc_active transition "
5908 "(%08x->%08x)\n", ap->qc_active, qc_active);
5912 for (i = 0; i < ATA_MAX_QUEUE; i++) {
5913 struct ata_queued_cmd *qc;
5915 if (!(done_mask & (1 << i)))
5918 if ((qc = ata_qc_from_tag(ap, i))) {
5921 ata_qc_complete(qc);
5930 * ata_qc_issue - issue taskfile to device
5931 * @qc: command to issue to device
5933 * Prepare an ATA command to submission to device.
5934 * This includes mapping the data into a DMA-able
5935 * area, filling in the S/G table, and finally
5936 * writing the taskfile to hardware, starting the command.
5939 * spin_lock_irqsave(host lock)
5941 void ata_qc_issue(struct ata_queued_cmd *qc)
5943 struct ata_port *ap = qc->ap;
5944 struct ata_link *link = qc->dev->link;
5945 u8 prot = qc->tf.protocol;
5947 /* Make sure only one non-NCQ command is outstanding. The
5948 * check is skipped for old EH because it reuses active qc to
5949 * request ATAPI sense.
5951 WARN_ON(ap->ops->error_handler && ata_tag_valid(link->active_tag));
5953 if (ata_is_ncq(prot)) {
5954 WARN_ON(link->sactive & (1 << qc->tag));
5957 ap->nr_active_links++;
5958 link->sactive |= 1 << qc->tag;
5960 WARN_ON(link->sactive);
5962 ap->nr_active_links++;
5963 link->active_tag = qc->tag;
5966 qc->flags |= ATA_QCFLAG_ACTIVE;
5967 ap->qc_active |= 1 << qc->tag;
5969 /* We guarantee to LLDs that they will have at least one
5970 * non-zero sg if the command is a data command.
5972 BUG_ON(ata_is_data(prot) && (!qc->sg || !qc->n_elem || !qc->nbytes));
5974 /* ata_sg_setup() may update nbytes */
5975 qc->raw_nbytes = qc->nbytes;
5977 if (ata_is_dma(prot) || (ata_is_pio(prot) &&
5978 (ap->flags & ATA_FLAG_PIO_DMA)))
5979 if (ata_sg_setup(qc))
5982 /* if device is sleeping, schedule softreset and abort the link */
5983 if (unlikely(qc->dev->flags & ATA_DFLAG_SLEEPING)) {
5984 link->eh_info.action |= ATA_EH_SOFTRESET;
5985 ata_ehi_push_desc(&link->eh_info, "waking up from sleep");
5986 ata_link_abort(link);
5990 ap->ops->qc_prep(qc);
5992 qc->err_mask |= ap->ops->qc_issue(qc);
5993 if (unlikely(qc->err_mask))
5998 qc->err_mask |= AC_ERR_SYSTEM;
6000 ata_qc_complete(qc);
6004 * ata_qc_issue_prot - issue taskfile to device in proto-dependent manner
6005 * @qc: command to issue to device
6007 * Using various libata functions and hooks, this function
6008 * starts an ATA command. ATA commands are grouped into
6009 * classes called "protocols", and issuing each type of protocol
6010 * is slightly different.
6012 * May be used as the qc_issue() entry in ata_port_operations.
6015 * spin_lock_irqsave(host lock)
6018 * Zero on success, AC_ERR_* mask on failure
6021 unsigned int ata_qc_issue_prot(struct ata_queued_cmd *qc)
6023 struct ata_port *ap = qc->ap;
6025 /* Use polling pio if the LLD doesn't handle
6026 * interrupt driven pio and atapi CDB interrupt.
6028 if (ap->flags & ATA_FLAG_PIO_POLLING) {
6029 switch (qc->tf.protocol) {
6031 case ATA_PROT_NODATA:
6032 case ATAPI_PROT_PIO:
6033 case ATAPI_PROT_NODATA:
6034 qc->tf.flags |= ATA_TFLAG_POLLING;
6036 case ATAPI_PROT_DMA:
6037 if (qc->dev->flags & ATA_DFLAG_CDB_INTR)
6038 /* see ata_dma_blacklisted() */
6046 /* select the device */
6047 ata_dev_select(ap, qc->dev->devno, 1, 0);
6049 /* start the command */
6050 switch (qc->tf.protocol) {
6051 case ATA_PROT_NODATA:
6052 if (qc->tf.flags & ATA_TFLAG_POLLING)
6053 ata_qc_set_polling(qc);
6055 ata_tf_to_host(ap, &qc->tf);
6056 ap->hsm_task_state = HSM_ST_LAST;
6058 if (qc->tf.flags & ATA_TFLAG_POLLING)
6059 ata_pio_queue_task(ap, qc, 0);
6064 WARN_ON(qc->tf.flags & ATA_TFLAG_POLLING);
6066 ap->ops->tf_load(ap, &qc->tf); /* load tf registers */
6067 ap->ops->bmdma_setup(qc); /* set up bmdma */
6068 ap->ops->bmdma_start(qc); /* initiate bmdma */
6069 ap->hsm_task_state = HSM_ST_LAST;
6073 if (qc->tf.flags & ATA_TFLAG_POLLING)
6074 ata_qc_set_polling(qc);
6076 ata_tf_to_host(ap, &qc->tf);
6078 if (qc->tf.flags & ATA_TFLAG_WRITE) {
6079 /* PIO data out protocol */
6080 ap->hsm_task_state = HSM_ST_FIRST;
6081 ata_pio_queue_task(ap, qc, 0);
6083 /* always send first data block using
6084 * the ata_pio_task() codepath.
6087 /* PIO data in protocol */
6088 ap->hsm_task_state = HSM_ST;
6090 if (qc->tf.flags & ATA_TFLAG_POLLING)
6091 ata_pio_queue_task(ap, qc, 0);
6093 /* if polling, ata_pio_task() handles the rest.
6094 * otherwise, interrupt handler takes over from here.
6100 case ATAPI_PROT_PIO:
6101 case ATAPI_PROT_NODATA:
6102 if (qc->tf.flags & ATA_TFLAG_POLLING)
6103 ata_qc_set_polling(qc);
6105 ata_tf_to_host(ap, &qc->tf);
6107 ap->hsm_task_state = HSM_ST_FIRST;
6109 /* send cdb by polling if no cdb interrupt */
6110 if ((!(qc->dev->flags & ATA_DFLAG_CDB_INTR)) ||
6111 (qc->tf.flags & ATA_TFLAG_POLLING))
6112 ata_pio_queue_task(ap, qc, 0);
6115 case ATAPI_PROT_DMA:
6116 WARN_ON(qc->tf.flags & ATA_TFLAG_POLLING);
6118 ap->ops->tf_load(ap, &qc->tf); /* load tf registers */
6119 ap->ops->bmdma_setup(qc); /* set up bmdma */
6120 ap->hsm_task_state = HSM_ST_FIRST;
6122 /* send cdb by polling if no cdb interrupt */
6123 if (!(qc->dev->flags & ATA_DFLAG_CDB_INTR))
6124 ata_pio_queue_task(ap, qc, 0);
6129 return AC_ERR_SYSTEM;
6136 * ata_host_intr - Handle host interrupt for given (port, task)
6137 * @ap: Port on which interrupt arrived (possibly...)
6138 * @qc: Taskfile currently active in engine
6140 * Handle host interrupt for given queued command. Currently,
6141 * only DMA interrupts are handled. All other commands are
6142 * handled via polling with interrupts disabled (nIEN bit).
6145 * spin_lock_irqsave(host lock)
6148 * One if interrupt was handled, zero if not (shared irq).
6151 inline unsigned int ata_host_intr(struct ata_port *ap,
6152 struct ata_queued_cmd *qc)
6154 struct ata_eh_info *ehi = &ap->link.eh_info;
6155 u8 status, host_stat = 0;
6157 VPRINTK("ata%u: protocol %d task_state %d\n",
6158 ap->print_id, qc->tf.protocol, ap->hsm_task_state);
6160 /* Check whether we are expecting interrupt in this state */
6161 switch (ap->hsm_task_state) {
6163 /* Some pre-ATAPI-4 devices assert INTRQ
6164 * at this state when ready to receive CDB.
6167 /* Check the ATA_DFLAG_CDB_INTR flag is enough here.
6168 * The flag was turned on only for atapi devices. No
6169 * need to check ata_is_atapi(qc->tf.protocol) again.
6171 if (!(qc->dev->flags & ATA_DFLAG_CDB_INTR))
6175 if (qc->tf.protocol == ATA_PROT_DMA ||
6176 qc->tf.protocol == ATAPI_PROT_DMA) {
6177 /* check status of DMA engine */
6178 host_stat = ap->ops->bmdma_status(ap);
6179 VPRINTK("ata%u: host_stat 0x%X\n",
6180 ap->print_id, host_stat);
6182 /* if it's not our irq... */
6183 if (!(host_stat & ATA_DMA_INTR))
6186 /* before we do anything else, clear DMA-Start bit */
6187 ap->ops->bmdma_stop(qc);
6189 if (unlikely(host_stat & ATA_DMA_ERR)) {
6190 /* error when transfering data to/from memory */
6191 qc->err_mask |= AC_ERR_HOST_BUS;
6192 ap->hsm_task_state = HSM_ST_ERR;
6202 /* check altstatus */
6203 status = ata_altstatus(ap);
6204 if (status & ATA_BUSY)
6207 /* check main status, clearing INTRQ */
6208 status = ata_chk_status(ap);
6209 if (unlikely(status & ATA_BUSY))
6212 /* ack bmdma irq events */
6213 ap->ops->irq_clear(ap);
6215 ata_hsm_move(ap, qc, status, 0);
6217 if (unlikely(qc->err_mask) && (qc->tf.protocol == ATA_PROT_DMA ||
6218 qc->tf.protocol == ATAPI_PROT_DMA))
6219 ata_ehi_push_desc(ehi, "BMDMA stat 0x%x", host_stat);
6221 return 1; /* irq handled */
6224 ap->stats.idle_irq++;
6227 if ((ap->stats.idle_irq % 1000) == 0) {
6229 ap->ops->irq_clear(ap);
6230 ata_port_printk(ap, KERN_WARNING, "irq trap\n");
6234 return 0; /* irq not handled */
6238 * ata_interrupt - Default ATA host interrupt handler
6239 * @irq: irq line (unused)
6240 * @dev_instance: pointer to our ata_host information structure
6242 * Default interrupt handler for PCI IDE devices. Calls
6243 * ata_host_intr() for each port that is not disabled.
6246 * Obtains host lock during operation.
6249 * IRQ_NONE or IRQ_HANDLED.
6252 irqreturn_t ata_interrupt(int irq, void *dev_instance)
6254 struct ata_host *host = dev_instance;
6256 unsigned int handled = 0;
6257 unsigned long flags;
6259 /* TODO: make _irqsave conditional on x86 PCI IDE legacy mode */
6260 spin_lock_irqsave(&host->lock, flags);
6262 for (i = 0; i < host->n_ports; i++) {
6263 struct ata_port *ap;
6265 ap = host->ports[i];
6267 !(ap->flags & ATA_FLAG_DISABLED)) {
6268 struct ata_queued_cmd *qc;
6270 qc = ata_qc_from_tag(ap, ap->link.active_tag);
6271 if (qc && (!(qc->tf.flags & ATA_TFLAG_POLLING)) &&
6272 (qc->flags & ATA_QCFLAG_ACTIVE))
6273 handled |= ata_host_intr(ap, qc);
6277 spin_unlock_irqrestore(&host->lock, flags);
6279 return IRQ_RETVAL(handled);
6283 * sata_scr_valid - test whether SCRs are accessible
6284 * @link: ATA link to test SCR accessibility for
6286 * Test whether SCRs are accessible for @link.
6292 * 1 if SCRs are accessible, 0 otherwise.
6294 int sata_scr_valid(struct ata_link *link)
6296 struct ata_port *ap = link->ap;
6298 return (ap->flags & ATA_FLAG_SATA) && ap->ops->scr_read;
6302 * sata_scr_read - read SCR register of the specified port
6303 * @link: ATA link to read SCR for
6305 * @val: Place to store read value
6307 * Read SCR register @reg of @link into *@val. This function is
6308 * guaranteed to succeed if @link is ap->link, the cable type of
6309 * the port is SATA and the port implements ->scr_read.
6312 * None if @link is ap->link. Kernel thread context otherwise.
6315 * 0 on success, negative errno on failure.
6317 int sata_scr_read(struct ata_link *link, int reg, u32 *val)
6319 if (ata_is_host_link(link)) {
6320 struct ata_port *ap = link->ap;
6322 if (sata_scr_valid(link))
6323 return ap->ops->scr_read(ap, reg, val);
6327 return sata_pmp_scr_read(link, reg, val);
6331 * sata_scr_write - write SCR register of the specified port
6332 * @link: ATA link to write SCR for
6333 * @reg: SCR to write
6334 * @val: value to write
6336 * Write @val to SCR register @reg of @link. This function is
6337 * guaranteed to succeed if @link is ap->link, the cable type of
6338 * the port is SATA and the port implements ->scr_read.
6341 * None if @link is ap->link. Kernel thread context otherwise.
6344 * 0 on success, negative errno on failure.
6346 int sata_scr_write(struct ata_link *link, int reg, u32 val)
6348 if (ata_is_host_link(link)) {
6349 struct ata_port *ap = link->ap;
6351 if (sata_scr_valid(link))
6352 return ap->ops->scr_write(ap, reg, val);
6356 return sata_pmp_scr_write(link, reg, val);
6360 * sata_scr_write_flush - write SCR register of the specified port and flush
6361 * @link: ATA link to write SCR for
6362 * @reg: SCR to write
6363 * @val: value to write
6365 * This function is identical to sata_scr_write() except that this
6366 * function performs flush after writing to the register.
6369 * None if @link is ap->link. Kernel thread context otherwise.
6372 * 0 on success, negative errno on failure.
6374 int sata_scr_write_flush(struct ata_link *link, int reg, u32 val)
6376 if (ata_is_host_link(link)) {
6377 struct ata_port *ap = link->ap;
6380 if (sata_scr_valid(link)) {
6381 rc = ap->ops->scr_write(ap, reg, val);
6383 rc = ap->ops->scr_read(ap, reg, &val);
6389 return sata_pmp_scr_write(link, reg, val);
6393 * ata_link_online - test whether the given link is online
6394 * @link: ATA link to test
6396 * Test whether @link is online. Note that this function returns
6397 * 0 if online status of @link cannot be obtained, so
6398 * ata_link_online(link) != !ata_link_offline(link).
6404 * 1 if the port online status is available and online.
6406 int ata_link_online(struct ata_link *link)
6410 if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0 &&
6411 (sstatus & 0xf) == 0x3)
6417 * ata_link_offline - test whether the given link is offline
6418 * @link: ATA link to test
6420 * Test whether @link is offline. Note that this function
6421 * returns 0 if offline status of @link cannot be obtained, so
6422 * ata_link_online(link) != !ata_link_offline(link).
6428 * 1 if the port offline status is available and offline.
6430 int ata_link_offline(struct ata_link *link)
6434 if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0 &&
6435 (sstatus & 0xf) != 0x3)
6440 int ata_flush_cache(struct ata_device *dev)
6442 unsigned int err_mask;
6445 if (!ata_try_flush_cache(dev))
6448 if (dev->flags & ATA_DFLAG_FLUSH_EXT)
6449 cmd = ATA_CMD_FLUSH_EXT;
6451 cmd = ATA_CMD_FLUSH;
6453 /* This is wrong. On a failed flush we get back the LBA of the lost
6454 sector and we should (assuming it wasn't aborted as unknown) issue
6455 a further flush command to continue the writeback until it
6457 err_mask = ata_do_simple_cmd(dev, cmd);
6459 ata_dev_printk(dev, KERN_ERR, "failed to flush cache\n");
6467 static int ata_host_request_pm(struct ata_host *host, pm_message_t mesg,
6468 unsigned int action, unsigned int ehi_flags,
6471 unsigned long flags;
6474 for (i = 0; i < host->n_ports; i++) {
6475 struct ata_port *ap = host->ports[i];
6476 struct ata_link *link;
6478 /* Previous resume operation might still be in
6479 * progress. Wait for PM_PENDING to clear.
6481 if (ap->pflags & ATA_PFLAG_PM_PENDING) {
6482 ata_port_wait_eh(ap);
6483 WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING);
6486 /* request PM ops to EH */
6487 spin_lock_irqsave(ap->lock, flags);
6492 ap->pm_result = &rc;
6495 ap->pflags |= ATA_PFLAG_PM_PENDING;
6496 __ata_port_for_each_link(link, ap) {
6497 link->eh_info.action |= action;
6498 link->eh_info.flags |= ehi_flags;
6501 ata_port_schedule_eh(ap);
6503 spin_unlock_irqrestore(ap->lock, flags);
6505 /* wait and check result */
6507 ata_port_wait_eh(ap);
6508 WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING);
6518 * ata_host_suspend - suspend host
6519 * @host: host to suspend
6522 * Suspend @host. Actual operation is performed by EH. This
6523 * function requests EH to perform PM operations and waits for EH
6527 * Kernel thread context (may sleep).
6530 * 0 on success, -errno on failure.
6532 int ata_host_suspend(struct ata_host *host, pm_message_t mesg)
6537 * disable link pm on all ports before requesting
6540 ata_lpm_enable(host);
6542 rc = ata_host_request_pm(host, mesg, 0, ATA_EHI_QUIET, 1);
6544 host->dev->power.power_state = mesg;
6549 * ata_host_resume - resume host
6550 * @host: host to resume
6552 * Resume @host. Actual operation is performed by EH. This
6553 * function requests EH to perform PM operations and returns.
6554 * Note that all resume operations are performed parallely.
6557 * Kernel thread context (may sleep).
6559 void ata_host_resume(struct ata_host *host)
6561 ata_host_request_pm(host, PMSG_ON, ATA_EH_SOFTRESET,
6562 ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET, 0);
6563 host->dev->power.power_state = PMSG_ON;
6565 /* reenable link pm */
6566 ata_lpm_disable(host);
6571 * ata_port_start - Set port up for dma.
6572 * @ap: Port to initialize
6574 * Called just after data structures for each port are
6575 * initialized. Allocates space for PRD table.
6577 * May be used as the port_start() entry in ata_port_operations.
6580 * Inherited from caller.
6582 int ata_port_start(struct ata_port *ap)
6584 struct device *dev = ap->dev;
6587 ap->prd = dmam_alloc_coherent(dev, ATA_PRD_TBL_SZ, &ap->prd_dma,
6592 rc = ata_pad_alloc(ap, dev);
6596 DPRINTK("prd alloc, virt %p, dma %llx\n", ap->prd,
6597 (unsigned long long)ap->prd_dma);
6602 * ata_dev_init - Initialize an ata_device structure
6603 * @dev: Device structure to initialize
6605 * Initialize @dev in preparation for probing.
6608 * Inherited from caller.
6610 void ata_dev_init(struct ata_device *dev)
6612 struct ata_link *link = dev->link;
6613 struct ata_port *ap = link->ap;
6614 unsigned long flags;
6616 /* SATA spd limit is bound to the first device */
6617 link->sata_spd_limit = link->hw_sata_spd_limit;
6620 /* High bits of dev->flags are used to record warm plug
6621 * requests which occur asynchronously. Synchronize using
6624 spin_lock_irqsave(ap->lock, flags);
6625 dev->flags &= ~ATA_DFLAG_INIT_MASK;
6627 spin_unlock_irqrestore(ap->lock, flags);
6629 memset((void *)dev + ATA_DEVICE_CLEAR_OFFSET, 0,
6630 sizeof(*dev) - ATA_DEVICE_CLEAR_OFFSET);
6631 dev->pio_mask = UINT_MAX;
6632 dev->mwdma_mask = UINT_MAX;
6633 dev->udma_mask = UINT_MAX;
6637 * ata_link_init - Initialize an ata_link structure
6638 * @ap: ATA port link is attached to
6639 * @link: Link structure to initialize
6640 * @pmp: Port multiplier port number
6645 * Kernel thread context (may sleep)
6647 void ata_link_init(struct ata_port *ap, struct ata_link *link, int pmp)
6651 /* clear everything except for devices */
6652 memset(link, 0, offsetof(struct ata_link, device[0]));
6656 link->active_tag = ATA_TAG_POISON;
6657 link->hw_sata_spd_limit = UINT_MAX;
6659 /* can't use iterator, ap isn't initialized yet */
6660 for (i = 0; i < ATA_MAX_DEVICES; i++) {
6661 struct ata_device *dev = &link->device[i];
6664 dev->devno = dev - link->device;
6670 * sata_link_init_spd - Initialize link->sata_spd_limit
6671 * @link: Link to configure sata_spd_limit for
6673 * Initialize @link->[hw_]sata_spd_limit to the currently
6677 * Kernel thread context (may sleep).
6680 * 0 on success, -errno on failure.
6682 int sata_link_init_spd(struct ata_link *link)
6687 rc = sata_scr_read(link, SCR_CONTROL, &scontrol);
6691 spd = (scontrol >> 4) & 0xf;
6693 link->hw_sata_spd_limit &= (1 << spd) - 1;
6695 link->sata_spd_limit = link->hw_sata_spd_limit;
6701 * ata_port_alloc - allocate and initialize basic ATA port resources
6702 * @host: ATA host this allocated port belongs to
6704 * Allocate and initialize basic ATA port resources.
6707 * Allocate ATA port on success, NULL on failure.
6710 * Inherited from calling layer (may sleep).
6712 struct ata_port *ata_port_alloc(struct ata_host *host)
6714 struct ata_port *ap;
6718 ap = kzalloc(sizeof(*ap), GFP_KERNEL);
6722 ap->pflags |= ATA_PFLAG_INITIALIZING;
6723 ap->lock = &host->lock;
6724 ap->flags = ATA_FLAG_DISABLED;
6726 ap->ctl = ATA_DEVCTL_OBS;
6728 ap->dev = host->dev;
6729 ap->last_ctl = 0xFF;
6731 #if defined(ATA_VERBOSE_DEBUG)
6732 /* turn on all debugging levels */
6733 ap->msg_enable = 0x00FF;
6734 #elif defined(ATA_DEBUG)
6735 ap->msg_enable = ATA_MSG_DRV | ATA_MSG_INFO | ATA_MSG_CTL | ATA_MSG_WARN | ATA_MSG_ERR;
6737 ap->msg_enable = ATA_MSG_DRV | ATA_MSG_ERR | ATA_MSG_WARN;
6740 INIT_DELAYED_WORK(&ap->port_task, ata_pio_task);
6741 INIT_DELAYED_WORK(&ap->hotplug_task, ata_scsi_hotplug);
6742 INIT_WORK(&ap->scsi_rescan_task, ata_scsi_dev_rescan);
6743 INIT_LIST_HEAD(&ap->eh_done_q);
6744 init_waitqueue_head(&ap->eh_wait_q);
6745 init_timer_deferrable(&ap->fastdrain_timer);
6746 ap->fastdrain_timer.function = ata_eh_fastdrain_timerfn;
6747 ap->fastdrain_timer.data = (unsigned long)ap;
6749 ap->cbl = ATA_CBL_NONE;
6751 ata_link_init(ap, &ap->link, 0);
6754 ap->stats.unhandled_irq = 1;
6755 ap->stats.idle_irq = 1;
6760 static void ata_host_release(struct device *gendev, void *res)
6762 struct ata_host *host = dev_get_drvdata(gendev);
6765 for (i = 0; i < host->n_ports; i++) {
6766 struct ata_port *ap = host->ports[i];
6772 scsi_host_put(ap->scsi_host);
6774 kfree(ap->pmp_link);
6776 host->ports[i] = NULL;
6779 dev_set_drvdata(gendev, NULL);
6783 * ata_host_alloc - allocate and init basic ATA host resources
6784 * @dev: generic device this host is associated with
6785 * @max_ports: maximum number of ATA ports associated with this host
6787 * Allocate and initialize basic ATA host resources. LLD calls
6788 * this function to allocate a host, initializes it fully and
6789 * attaches it using ata_host_register().
6791 * @max_ports ports are allocated and host->n_ports is
6792 * initialized to @max_ports. The caller is allowed to decrease
6793 * host->n_ports before calling ata_host_register(). The unused
6794 * ports will be automatically freed on registration.
6797 * Allocate ATA host on success, NULL on failure.
6800 * Inherited from calling layer (may sleep).
6802 struct ata_host *ata_host_alloc(struct device *dev, int max_ports)
6804 struct ata_host *host;
6810 if (!devres_open_group(dev, NULL, GFP_KERNEL))
6813 /* alloc a container for our list of ATA ports (buses) */
6814 sz = sizeof(struct ata_host) + (max_ports + 1) * sizeof(void *);
6815 /* alloc a container for our list of ATA ports (buses) */
6816 host = devres_alloc(ata_host_release, sz, GFP_KERNEL);
6820 devres_add(dev, host);
6821 dev_set_drvdata(dev, host);
6823 spin_lock_init(&host->lock);
6825 host->n_ports = max_ports;
6827 /* allocate ports bound to this host */
6828 for (i = 0; i < max_ports; i++) {
6829 struct ata_port *ap;
6831 ap = ata_port_alloc(host);
6836 host->ports[i] = ap;
6839 devres_remove_group(dev, NULL);
6843 devres_release_group(dev, NULL);
6848 * ata_host_alloc_pinfo - alloc host and init with port_info array
6849 * @dev: generic device this host is associated with
6850 * @ppi: array of ATA port_info to initialize host with
6851 * @n_ports: number of ATA ports attached to this host
6853 * Allocate ATA host and initialize with info from @ppi. If NULL
6854 * terminated, @ppi may contain fewer entries than @n_ports. The
6855 * last entry will be used for the remaining ports.
6858 * Allocate ATA host on success, NULL on failure.
6861 * Inherited from calling layer (may sleep).
6863 struct ata_host *ata_host_alloc_pinfo(struct device *dev,
6864 const struct ata_port_info * const * ppi,
6867 const struct ata_port_info *pi;
6868 struct ata_host *host;
6871 host = ata_host_alloc(dev, n_ports);
6875 for (i = 0, j = 0, pi = NULL; i < host->n_ports; i++) {
6876 struct ata_port *ap = host->ports[i];
6881 ap->pio_mask = pi->pio_mask;
6882 ap->mwdma_mask = pi->mwdma_mask;
6883 ap->udma_mask = pi->udma_mask;
6884 ap->flags |= pi->flags;
6885 ap->link.flags |= pi->link_flags;
6886 ap->ops = pi->port_ops;
6888 if (!host->ops && (pi->port_ops != &ata_dummy_port_ops))
6889 host->ops = pi->port_ops;
6890 if (!host->private_data && pi->private_data)
6891 host->private_data = pi->private_data;
6897 static void ata_host_stop(struct device *gendev, void *res)
6899 struct ata_host *host = dev_get_drvdata(gendev);
6902 WARN_ON(!(host->flags & ATA_HOST_STARTED));
6904 for (i = 0; i < host->n_ports; i++) {
6905 struct ata_port *ap = host->ports[i];
6907 if (ap->ops->port_stop)
6908 ap->ops->port_stop(ap);
6911 if (host->ops->host_stop)
6912 host->ops->host_stop(host);
6916 * ata_host_start - start and freeze ports of an ATA host
6917 * @host: ATA host to start ports for
6919 * Start and then freeze ports of @host. Started status is
6920 * recorded in host->flags, so this function can be called
6921 * multiple times. Ports are guaranteed to get started only
6922 * once. If host->ops isn't initialized yet, its set to the
6923 * first non-dummy port ops.
6926 * Inherited from calling layer (may sleep).
6929 * 0 if all ports are started successfully, -errno otherwise.
6931 int ata_host_start(struct ata_host *host)
6934 void *start_dr = NULL;
6937 if (host->flags & ATA_HOST_STARTED)
6940 for (i = 0; i < host->n_ports; i++) {
6941 struct ata_port *ap = host->ports[i];
6943 if (!host->ops && !ata_port_is_dummy(ap))
6944 host->ops = ap->ops;
6946 if (ap->ops->port_stop)
6950 if (host->ops->host_stop)
6954 start_dr = devres_alloc(ata_host_stop, 0, GFP_KERNEL);
6959 for (i = 0; i < host->n_ports; i++) {
6960 struct ata_port *ap = host->ports[i];
6962 if (ap->ops->port_start) {
6963 rc = ap->ops->port_start(ap);
6966 dev_printk(KERN_ERR, host->dev,
6967 "failed to start port %d "
6968 "(errno=%d)\n", i, rc);
6972 ata_eh_freeze_port(ap);
6976 devres_add(host->dev, start_dr);
6977 host->flags |= ATA_HOST_STARTED;
6982 struct ata_port *ap = host->ports[i];
6984 if (ap->ops->port_stop)
6985 ap->ops->port_stop(ap);
6987 devres_free(start_dr);
6992 * ata_sas_host_init - Initialize a host struct
6993 * @host: host to initialize
6994 * @dev: device host is attached to
6995 * @flags: host flags
6999 * PCI/etc. bus probe sem.
7002 /* KILLME - the only user left is ipr */
7003 void ata_host_init(struct ata_host *host, struct device *dev,
7004 unsigned long flags, const struct ata_port_operations *ops)
7006 spin_lock_init(&host->lock);
7008 host->flags = flags;
7013 * ata_host_register - register initialized ATA host
7014 * @host: ATA host to register
7015 * @sht: template for SCSI host
7017 * Register initialized ATA host. @host is allocated using
7018 * ata_host_alloc() and fully initialized by LLD. This function
7019 * starts ports, registers @host with ATA and SCSI layers and
7020 * probe registered devices.
7023 * Inherited from calling layer (may sleep).
7026 * 0 on success, -errno otherwise.
7028 int ata_host_register(struct ata_host *host, struct scsi_host_template *sht)
7032 /* host must have been started */
7033 if (!(host->flags & ATA_HOST_STARTED)) {
7034 dev_printk(KERN_ERR, host->dev,
7035 "BUG: trying to register unstarted host\n");
7040 /* Blow away unused ports. This happens when LLD can't
7041 * determine the exact number of ports to allocate at
7044 for (i = host->n_ports; host->ports[i]; i++)
7045 kfree(host->ports[i]);
7047 /* give ports names and add SCSI hosts */
7048 for (i = 0; i < host->n_ports; i++)
7049 host->ports[i]->print_id = ata_print_id++;
7051 rc = ata_scsi_add_hosts(host, sht);
7055 /* associate with ACPI nodes */
7056 ata_acpi_associate(host);
7058 /* set cable, sata_spd_limit and report */
7059 for (i = 0; i < host->n_ports; i++) {
7060 struct ata_port *ap = host->ports[i];
7061 unsigned long xfer_mask;
7063 /* set SATA cable type if still unset */
7064 if (ap->cbl == ATA_CBL_NONE && (ap->flags & ATA_FLAG_SATA))
7065 ap->cbl = ATA_CBL_SATA;
7067 /* init sata_spd_limit to the current value */
7068 sata_link_init_spd(&ap->link);
7070 /* print per-port info to dmesg */
7071 xfer_mask = ata_pack_xfermask(ap->pio_mask, ap->mwdma_mask,
7074 if (!ata_port_is_dummy(ap)) {
7075 ata_port_printk(ap, KERN_INFO,
7076 "%cATA max %s %s\n",
7077 (ap->flags & ATA_FLAG_SATA) ? 'S' : 'P',
7078 ata_mode_string(xfer_mask),
7079 ap->link.eh_info.desc);
7080 ata_ehi_clear_desc(&ap->link.eh_info);
7082 ata_port_printk(ap, KERN_INFO, "DUMMY\n");
7085 /* perform each probe synchronously */
7086 DPRINTK("probe begin\n");
7087 for (i = 0; i < host->n_ports; i++) {
7088 struct ata_port *ap = host->ports[i];
7092 if (ap->ops->error_handler) {
7093 struct ata_eh_info *ehi = &ap->link.eh_info;
7094 unsigned long flags;
7098 /* kick EH for boot probing */
7099 spin_lock_irqsave(ap->lock, flags);
7102 (1 << ata_link_max_devices(&ap->link)) - 1;
7103 ehi->action |= ATA_EH_SOFTRESET;
7104 ehi->flags |= ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET;
7106 ap->pflags &= ~ATA_PFLAG_INITIALIZING;
7107 ap->pflags |= ATA_PFLAG_LOADING;
7108 ata_port_schedule_eh(ap);
7110 spin_unlock_irqrestore(ap->lock, flags);
7112 /* wait for EH to finish */
7113 ata_port_wait_eh(ap);
7115 DPRINTK("ata%u: bus probe begin\n", ap->print_id);
7116 rc = ata_bus_probe(ap);
7117 DPRINTK("ata%u: bus probe end\n", ap->print_id);
7120 /* FIXME: do something useful here?
7121 * Current libata behavior will
7122 * tear down everything when
7123 * the module is removed
7124 * or the h/w is unplugged.
7130 /* probes are done, now scan each port's disk(s) */
7131 DPRINTK("host probe begin\n");
7132 for (i = 0; i < host->n_ports; i++) {
7133 struct ata_port *ap = host->ports[i];
7135 ata_scsi_scan_host(ap, 1);
7136 ata_lpm_schedule(ap, ap->pm_policy);
7143 * ata_host_activate - start host, request IRQ and register it
7144 * @host: target ATA host
7145 * @irq: IRQ to request
7146 * @irq_handler: irq_handler used when requesting IRQ
7147 * @irq_flags: irq_flags used when requesting IRQ
7148 * @sht: scsi_host_template to use when registering the host
7150 * After allocating an ATA host and initializing it, most libata
7151 * LLDs perform three steps to activate the host - start host,
7152 * request IRQ and register it. This helper takes necessasry
7153 * arguments and performs the three steps in one go.
7155 * An invalid IRQ skips the IRQ registration and expects the host to
7156 * have set polling mode on the port. In this case, @irq_handler
7160 * Inherited from calling layer (may sleep).
7163 * 0 on success, -errno otherwise.
7165 int ata_host_activate(struct ata_host *host, int irq,
7166 irq_handler_t irq_handler, unsigned long irq_flags,
7167 struct scsi_host_template *sht)
7171 rc = ata_host_start(host);
7175 /* Special case for polling mode */
7177 WARN_ON(irq_handler);
7178 return ata_host_register(host, sht);
7181 rc = devm_request_irq(host->dev, irq, irq_handler, irq_flags,
7182 dev_driver_string(host->dev), host);
7186 for (i = 0; i < host->n_ports; i++)
7187 ata_port_desc(host->ports[i], "irq %d", irq);
7189 rc = ata_host_register(host, sht);
7190 /* if failed, just free the IRQ and leave ports alone */
7192 devm_free_irq(host->dev, irq, host);
7198 * ata_port_detach - Detach ATA port in prepration of device removal
7199 * @ap: ATA port to be detached
7201 * Detach all ATA devices and the associated SCSI devices of @ap;
7202 * then, remove the associated SCSI host. @ap is guaranteed to
7203 * be quiescent on return from this function.
7206 * Kernel thread context (may sleep).
7208 static void ata_port_detach(struct ata_port *ap)
7210 unsigned long flags;
7211 struct ata_link *link;
7212 struct ata_device *dev;
7214 if (!ap->ops->error_handler)
7217 /* tell EH we're leaving & flush EH */
7218 spin_lock_irqsave(ap->lock, flags);
7219 ap->pflags |= ATA_PFLAG_UNLOADING;
7220 spin_unlock_irqrestore(ap->lock, flags);
7222 ata_port_wait_eh(ap);
7224 /* EH is now guaranteed to see UNLOADING - EH context belongs
7225 * to us. Disable all existing devices.
7227 ata_port_for_each_link(link, ap) {
7228 ata_link_for_each_dev(dev, link)
7229 ata_dev_disable(dev);
7232 /* Final freeze & EH. All in-flight commands are aborted. EH
7233 * will be skipped and retrials will be terminated with bad
7236 spin_lock_irqsave(ap->lock, flags);
7237 ata_port_freeze(ap); /* won't be thawed */
7238 spin_unlock_irqrestore(ap->lock, flags);
7240 ata_port_wait_eh(ap);
7241 cancel_rearming_delayed_work(&ap->hotplug_task);
7244 /* remove the associated SCSI host */
7245 scsi_remove_host(ap->scsi_host);
7249 * ata_host_detach - Detach all ports of an ATA host
7250 * @host: Host to detach
7252 * Detach all ports of @host.
7255 * Kernel thread context (may sleep).
7257 void ata_host_detach(struct ata_host *host)
7261 for (i = 0; i < host->n_ports; i++)
7262 ata_port_detach(host->ports[i]);
7264 /* the host is dead now, dissociate ACPI */
7265 ata_acpi_dissociate(host);
7269 * ata_std_ports - initialize ioaddr with standard port offsets.
7270 * @ioaddr: IO address structure to be initialized
7272 * Utility function which initializes data_addr, error_addr,
7273 * feature_addr, nsect_addr, lbal_addr, lbam_addr, lbah_addr,
7274 * device_addr, status_addr, and command_addr to standard offsets
7275 * relative to cmd_addr.
7277 * Does not set ctl_addr, altstatus_addr, bmdma_addr, or scr_addr.
7280 void ata_std_ports(struct ata_ioports *ioaddr)
7282 ioaddr->data_addr = ioaddr->cmd_addr + ATA_REG_DATA;
7283 ioaddr->error_addr = ioaddr->cmd_addr + ATA_REG_ERR;
7284 ioaddr->feature_addr = ioaddr->cmd_addr + ATA_REG_FEATURE;
7285 ioaddr->nsect_addr = ioaddr->cmd_addr + ATA_REG_NSECT;
7286 ioaddr->lbal_addr = ioaddr->cmd_addr + ATA_REG_LBAL;
7287 ioaddr->lbam_addr = ioaddr->cmd_addr + ATA_REG_LBAM;
7288 ioaddr->lbah_addr = ioaddr->cmd_addr + ATA_REG_LBAH;
7289 ioaddr->device_addr = ioaddr->cmd_addr + ATA_REG_DEVICE;
7290 ioaddr->status_addr = ioaddr->cmd_addr + ATA_REG_STATUS;
7291 ioaddr->command_addr = ioaddr->cmd_addr + ATA_REG_CMD;
7298 * ata_pci_remove_one - PCI layer callback for device removal
7299 * @pdev: PCI device that was removed
7301 * PCI layer indicates to libata via this hook that hot-unplug or
7302 * module unload event has occurred. Detach all ports. Resource
7303 * release is handled via devres.
7306 * Inherited from PCI layer (may sleep).
7308 void ata_pci_remove_one(struct pci_dev *pdev)
7310 struct device *dev = &pdev->dev;
7311 struct ata_host *host = dev_get_drvdata(dev);
7313 ata_host_detach(host);
7316 /* move to PCI subsystem */
7317 int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits)
7319 unsigned long tmp = 0;
7321 switch (bits->width) {
7324 pci_read_config_byte(pdev, bits->reg, &tmp8);
7330 pci_read_config_word(pdev, bits->reg, &tmp16);
7336 pci_read_config_dword(pdev, bits->reg, &tmp32);
7347 return (tmp == bits->val) ? 1 : 0;
7351 void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg)
7353 pci_save_state(pdev);
7354 pci_disable_device(pdev);
7356 if (mesg.event == PM_EVENT_SUSPEND)
7357 pci_set_power_state(pdev, PCI_D3hot);
7360 int ata_pci_device_do_resume(struct pci_dev *pdev)
7364 pci_set_power_state(pdev, PCI_D0);
7365 pci_restore_state(pdev);
7367 rc = pcim_enable_device(pdev);
7369 dev_printk(KERN_ERR, &pdev->dev,
7370 "failed to enable device after resume (%d)\n", rc);
7374 pci_set_master(pdev);
7378 int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg)
7380 struct ata_host *host = dev_get_drvdata(&pdev->dev);
7383 rc = ata_host_suspend(host, mesg);
7387 ata_pci_device_do_suspend(pdev, mesg);
7392 int ata_pci_device_resume(struct pci_dev *pdev)
7394 struct ata_host *host = dev_get_drvdata(&pdev->dev);
7397 rc = ata_pci_device_do_resume(pdev);
7399 ata_host_resume(host);
7402 #endif /* CONFIG_PM */
7404 #endif /* CONFIG_PCI */
7407 static int __init ata_init(void)
7409 ata_probe_timeout *= HZ;
7410 ata_wq = create_workqueue("ata");
7414 ata_aux_wq = create_singlethread_workqueue("ata_aux");
7416 destroy_workqueue(ata_wq);
7420 printk(KERN_DEBUG "libata version " DRV_VERSION " loaded.\n");
7424 static void __exit ata_exit(void)
7426 destroy_workqueue(ata_wq);
7427 destroy_workqueue(ata_aux_wq);
7430 subsys_initcall(ata_init);
7431 module_exit(ata_exit);
7433 static unsigned long ratelimit_time;
7434 static DEFINE_SPINLOCK(ata_ratelimit_lock);
7436 int ata_ratelimit(void)
7439 unsigned long flags;
7441 spin_lock_irqsave(&ata_ratelimit_lock, flags);
7443 if (time_after(jiffies, ratelimit_time)) {
7445 ratelimit_time = jiffies + (HZ/5);
7449 spin_unlock_irqrestore(&ata_ratelimit_lock, flags);
7455 * ata_wait_register - wait until register value changes
7456 * @reg: IO-mapped register
7457 * @mask: Mask to apply to read register value
7458 * @val: Wait condition
7459 * @interval_msec: polling interval in milliseconds
7460 * @timeout_msec: timeout in milliseconds
7462 * Waiting for some bits of register to change is a common
7463 * operation for ATA controllers. This function reads 32bit LE
7464 * IO-mapped register @reg and tests for the following condition.
7466 * (*@reg & mask) != val
7468 * If the condition is met, it returns; otherwise, the process is
7469 * repeated after @interval_msec until timeout.
7472 * Kernel thread context (may sleep)
7475 * The final register value.
7477 u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val,
7478 unsigned long interval_msec,
7479 unsigned long timeout_msec)
7481 unsigned long timeout;
7484 tmp = ioread32(reg);
7486 /* Calculate timeout _after_ the first read to make sure
7487 * preceding writes reach the controller before starting to
7488 * eat away the timeout.
7490 timeout = jiffies + (timeout_msec * HZ) / 1000;
7492 while ((tmp & mask) == val && time_before(jiffies, timeout)) {
7493 msleep(interval_msec);
7494 tmp = ioread32(reg);
7503 static void ata_dummy_noret(struct ata_port *ap) { }
7504 static int ata_dummy_ret0(struct ata_port *ap) { return 0; }
7505 static void ata_dummy_qc_noret(struct ata_queued_cmd *qc) { }
7507 static u8 ata_dummy_check_status(struct ata_port *ap)
7512 static unsigned int ata_dummy_qc_issue(struct ata_queued_cmd *qc)
7514 return AC_ERR_SYSTEM;
7517 const struct ata_port_operations ata_dummy_port_ops = {
7518 .check_status = ata_dummy_check_status,
7519 .check_altstatus = ata_dummy_check_status,
7520 .dev_select = ata_noop_dev_select,
7521 .qc_prep = ata_noop_qc_prep,
7522 .qc_issue = ata_dummy_qc_issue,
7523 .freeze = ata_dummy_noret,
7524 .thaw = ata_dummy_noret,
7525 .error_handler = ata_dummy_noret,
7526 .post_internal_cmd = ata_dummy_qc_noret,
7527 .irq_clear = ata_dummy_noret,
7528 .port_start = ata_dummy_ret0,
7529 .port_stop = ata_dummy_noret,
7532 const struct ata_port_info ata_dummy_port_info = {
7533 .port_ops = &ata_dummy_port_ops,
7537 * libata is essentially a library of internal helper functions for
7538 * low-level ATA host controller drivers. As such, the API/ABI is
7539 * likely to change as new drivers are added and updated.
7540 * Do not depend on ABI/API stability.
7542 EXPORT_SYMBOL_GPL(sata_deb_timing_normal);
7543 EXPORT_SYMBOL_GPL(sata_deb_timing_hotplug);
7544 EXPORT_SYMBOL_GPL(sata_deb_timing_long);
7545 EXPORT_SYMBOL_GPL(ata_dummy_port_ops);
7546 EXPORT_SYMBOL_GPL(ata_dummy_port_info);
7547 EXPORT_SYMBOL_GPL(ata_std_bios_param);
7548 EXPORT_SYMBOL_GPL(ata_std_ports);
7549 EXPORT_SYMBOL_GPL(ata_host_init);
7550 EXPORT_SYMBOL_GPL(ata_host_alloc);
7551 EXPORT_SYMBOL_GPL(ata_host_alloc_pinfo);
7552 EXPORT_SYMBOL_GPL(ata_host_start);
7553 EXPORT_SYMBOL_GPL(ata_host_register);
7554 EXPORT_SYMBOL_GPL(ata_host_activate);
7555 EXPORT_SYMBOL_GPL(ata_host_detach);
7556 EXPORT_SYMBOL_GPL(ata_sg_init);
7557 EXPORT_SYMBOL_GPL(ata_hsm_move);
7558 EXPORT_SYMBOL_GPL(ata_qc_complete);
7559 EXPORT_SYMBOL_GPL(ata_qc_complete_multiple);
7560 EXPORT_SYMBOL_GPL(ata_qc_issue_prot);
7561 EXPORT_SYMBOL_GPL(ata_tf_load);
7562 EXPORT_SYMBOL_GPL(ata_tf_read);
7563 EXPORT_SYMBOL_GPL(ata_noop_dev_select);
7564 EXPORT_SYMBOL_GPL(ata_std_dev_select);
7565 EXPORT_SYMBOL_GPL(sata_print_link_status);
7566 EXPORT_SYMBOL_GPL(ata_tf_to_fis);
7567 EXPORT_SYMBOL_GPL(ata_tf_from_fis);
7568 EXPORT_SYMBOL_GPL(ata_pack_xfermask);
7569 EXPORT_SYMBOL_GPL(ata_unpack_xfermask);
7570 EXPORT_SYMBOL_GPL(ata_xfer_mask2mode);
7571 EXPORT_SYMBOL_GPL(ata_xfer_mode2mask);
7572 EXPORT_SYMBOL_GPL(ata_xfer_mode2shift);
7573 EXPORT_SYMBOL_GPL(ata_mode_string);
7574 EXPORT_SYMBOL_GPL(ata_id_xfermask);
7575 EXPORT_SYMBOL_GPL(ata_check_status);
7576 EXPORT_SYMBOL_GPL(ata_altstatus);
7577 EXPORT_SYMBOL_GPL(ata_exec_command);
7578 EXPORT_SYMBOL_GPL(ata_port_start);
7579 EXPORT_SYMBOL_GPL(ata_sff_port_start);
7580 EXPORT_SYMBOL_GPL(ata_interrupt);
7581 EXPORT_SYMBOL_GPL(ata_do_set_mode);
7582 EXPORT_SYMBOL_GPL(ata_data_xfer);
7583 EXPORT_SYMBOL_GPL(ata_data_xfer_noirq);
7584 EXPORT_SYMBOL_GPL(ata_std_qc_defer);
7585 EXPORT_SYMBOL_GPL(ata_qc_prep);
7586 EXPORT_SYMBOL_GPL(ata_dumb_qc_prep);
7587 EXPORT_SYMBOL_GPL(ata_noop_qc_prep);
7588 EXPORT_SYMBOL_GPL(ata_bmdma_setup);
7589 EXPORT_SYMBOL_GPL(ata_bmdma_start);
7590 EXPORT_SYMBOL_GPL(ata_bmdma_irq_clear);
7591 EXPORT_SYMBOL_GPL(ata_bmdma_status);
7592 EXPORT_SYMBOL_GPL(ata_bmdma_stop);
7593 EXPORT_SYMBOL_GPL(ata_bmdma_freeze);
7594 EXPORT_SYMBOL_GPL(ata_bmdma_thaw);
7595 EXPORT_SYMBOL_GPL(ata_bmdma_drive_eh);
7596 EXPORT_SYMBOL_GPL(ata_bmdma_error_handler);
7597 EXPORT_SYMBOL_GPL(ata_bmdma_post_internal_cmd);
7598 EXPORT_SYMBOL_GPL(ata_port_probe);
7599 EXPORT_SYMBOL_GPL(ata_dev_disable);
7600 EXPORT_SYMBOL_GPL(sata_set_spd);
7601 EXPORT_SYMBOL_GPL(sata_link_debounce);
7602 EXPORT_SYMBOL_GPL(sata_link_resume);
7603 EXPORT_SYMBOL_GPL(ata_bus_reset);
7604 EXPORT_SYMBOL_GPL(ata_std_prereset);
7605 EXPORT_SYMBOL_GPL(ata_std_softreset);
7606 EXPORT_SYMBOL_GPL(sata_link_hardreset);
7607 EXPORT_SYMBOL_GPL(sata_std_hardreset);
7608 EXPORT_SYMBOL_GPL(ata_std_postreset);
7609 EXPORT_SYMBOL_GPL(ata_dev_classify);
7610 EXPORT_SYMBOL_GPL(ata_dev_pair);
7611 EXPORT_SYMBOL_GPL(ata_port_disable);
7612 EXPORT_SYMBOL_GPL(ata_ratelimit);
7613 EXPORT_SYMBOL_GPL(ata_wait_register);
7614 EXPORT_SYMBOL_GPL(ata_busy_sleep);
7615 EXPORT_SYMBOL_GPL(ata_wait_after_reset);
7616 EXPORT_SYMBOL_GPL(ata_wait_ready);
7617 EXPORT_SYMBOL_GPL(ata_scsi_ioctl);
7618 EXPORT_SYMBOL_GPL(ata_scsi_queuecmd);
7619 EXPORT_SYMBOL_GPL(ata_scsi_slave_config);
7620 EXPORT_SYMBOL_GPL(ata_scsi_slave_destroy);
7621 EXPORT_SYMBOL_GPL(ata_scsi_change_queue_depth);
7622 EXPORT_SYMBOL_GPL(ata_host_intr);
7623 EXPORT_SYMBOL_GPL(sata_scr_valid);
7624 EXPORT_SYMBOL_GPL(sata_scr_read);
7625 EXPORT_SYMBOL_GPL(sata_scr_write);
7626 EXPORT_SYMBOL_GPL(sata_scr_write_flush);
7627 EXPORT_SYMBOL_GPL(ata_link_online);
7628 EXPORT_SYMBOL_GPL(ata_link_offline);
7630 EXPORT_SYMBOL_GPL(ata_host_suspend);
7631 EXPORT_SYMBOL_GPL(ata_host_resume);
7632 #endif /* CONFIG_PM */
7633 EXPORT_SYMBOL_GPL(ata_id_string);
7634 EXPORT_SYMBOL_GPL(ata_id_c_string);
7635 EXPORT_SYMBOL_GPL(ata_scsi_simulate);
7637 EXPORT_SYMBOL_GPL(ata_pio_need_iordy);
7638 EXPORT_SYMBOL_GPL(ata_timing_find_mode);
7639 EXPORT_SYMBOL_GPL(ata_timing_compute);
7640 EXPORT_SYMBOL_GPL(ata_timing_merge);
7641 EXPORT_SYMBOL_GPL(ata_timing_cycle2mode);
7644 EXPORT_SYMBOL_GPL(pci_test_config_bits);
7645 EXPORT_SYMBOL_GPL(ata_pci_init_sff_host);
7646 EXPORT_SYMBOL_GPL(ata_pci_init_bmdma);
7647 EXPORT_SYMBOL_GPL(ata_pci_prepare_sff_host);
7648 EXPORT_SYMBOL_GPL(ata_pci_activate_sff_host);
7649 EXPORT_SYMBOL_GPL(ata_pci_init_one);
7650 EXPORT_SYMBOL_GPL(ata_pci_remove_one);
7652 EXPORT_SYMBOL_GPL(ata_pci_device_do_suspend);
7653 EXPORT_SYMBOL_GPL(ata_pci_device_do_resume);
7654 EXPORT_SYMBOL_GPL(ata_pci_device_suspend);
7655 EXPORT_SYMBOL_GPL(ata_pci_device_resume);
7656 #endif /* CONFIG_PM */
7657 EXPORT_SYMBOL_GPL(ata_pci_default_filter);
7658 EXPORT_SYMBOL_GPL(ata_pci_clear_simplex);
7659 #endif /* CONFIG_PCI */
7661 EXPORT_SYMBOL_GPL(sata_pmp_qc_defer_cmd_switch);
7662 EXPORT_SYMBOL_GPL(sata_pmp_std_prereset);
7663 EXPORT_SYMBOL_GPL(sata_pmp_std_hardreset);
7664 EXPORT_SYMBOL_GPL(sata_pmp_std_postreset);
7665 EXPORT_SYMBOL_GPL(sata_pmp_do_eh);
7667 EXPORT_SYMBOL_GPL(__ata_ehi_push_desc);
7668 EXPORT_SYMBOL_GPL(ata_ehi_push_desc);
7669 EXPORT_SYMBOL_GPL(ata_ehi_clear_desc);
7670 EXPORT_SYMBOL_GPL(ata_port_desc);
7672 EXPORT_SYMBOL_GPL(ata_port_pbar_desc);
7673 #endif /* CONFIG_PCI */
7674 EXPORT_SYMBOL_GPL(ata_port_schedule_eh);
7675 EXPORT_SYMBOL_GPL(ata_link_abort);
7676 EXPORT_SYMBOL_GPL(ata_port_abort);
7677 EXPORT_SYMBOL_GPL(ata_port_freeze);
7678 EXPORT_SYMBOL_GPL(sata_async_notification);
7679 EXPORT_SYMBOL_GPL(ata_eh_freeze_port);
7680 EXPORT_SYMBOL_GPL(ata_eh_thaw_port);
7681 EXPORT_SYMBOL_GPL(ata_eh_qc_complete);
7682 EXPORT_SYMBOL_GPL(ata_eh_qc_retry);
7683 EXPORT_SYMBOL_GPL(ata_do_eh);
7684 EXPORT_SYMBOL_GPL(ata_irq_on);
7685 EXPORT_SYMBOL_GPL(ata_dev_try_classify);
7687 EXPORT_SYMBOL_GPL(ata_cable_40wire);
7688 EXPORT_SYMBOL_GPL(ata_cable_80wire);
7689 EXPORT_SYMBOL_GPL(ata_cable_unknown);
7690 EXPORT_SYMBOL_GPL(ata_cable_ignore);
7691 EXPORT_SYMBOL_GPL(ata_cable_sata);