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: if master then continue and warn later */
954 if (err == 0 && dev->devno == 0)
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_port_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_port_queue_task() may be ignored for EH
1499 * Inherited from caller.
1501 void ata_port_queue_task(struct ata_port *ap, work_func_t fn, void *data,
1502 unsigned long delay)
1504 PREPARE_DELAYED_WORK(&ap->port_task, fn);
1505 ap->port_task_data = data;
1507 /* may fail if ata_port_flush_task() in progress */
1508 queue_delayed_work(ata_wq, &ap->port_task, delay);
1512 * ata_port_flush_task - Flush port_task
1513 * @ap: The ata_port to flush port_task for
1515 * After this function completes, port_task is guranteed not to
1516 * be running or scheduled.
1519 * Kernel thread context (may sleep)
1521 void ata_port_flush_task(struct ata_port *ap)
1525 cancel_rearming_delayed_work(&ap->port_task);
1527 if (ata_msg_ctl(ap))
1528 ata_port_printk(ap, KERN_DEBUG, "%s: EXIT\n", __FUNCTION__);
1531 static void ata_qc_complete_internal(struct ata_queued_cmd *qc)
1533 struct completion *waiting = qc->private_data;
1539 * ata_exec_internal_sg - execute libata internal command
1540 * @dev: Device to which the command is sent
1541 * @tf: Taskfile registers for the command and the result
1542 * @cdb: CDB for packet command
1543 * @dma_dir: Data tranfer direction of the command
1544 * @sgl: sg list for the data buffer of the command
1545 * @n_elem: Number of sg entries
1546 * @timeout: Timeout in msecs (0 for default)
1548 * Executes libata internal command with timeout. @tf contains
1549 * command on entry and result on return. Timeout and error
1550 * conditions are reported via return value. No recovery action
1551 * is taken after a command times out. It's caller's duty to
1552 * clean up after timeout.
1555 * None. Should be called with kernel context, might sleep.
1558 * Zero on success, AC_ERR_* mask on failure
1560 unsigned ata_exec_internal_sg(struct ata_device *dev,
1561 struct ata_taskfile *tf, const u8 *cdb,
1562 int dma_dir, struct scatterlist *sgl,
1563 unsigned int n_elem, unsigned long timeout)
1565 struct ata_link *link = dev->link;
1566 struct ata_port *ap = link->ap;
1567 u8 command = tf->command;
1568 struct ata_queued_cmd *qc;
1569 unsigned int tag, preempted_tag;
1570 u32 preempted_sactive, preempted_qc_active;
1571 int preempted_nr_active_links;
1572 DECLARE_COMPLETION_ONSTACK(wait);
1573 unsigned long flags;
1574 unsigned int err_mask;
1577 spin_lock_irqsave(ap->lock, flags);
1579 /* no internal command while frozen */
1580 if (ap->pflags & ATA_PFLAG_FROZEN) {
1581 spin_unlock_irqrestore(ap->lock, flags);
1582 return AC_ERR_SYSTEM;
1585 /* initialize internal qc */
1587 /* XXX: Tag 0 is used for drivers with legacy EH as some
1588 * drivers choke if any other tag is given. This breaks
1589 * ata_tag_internal() test for those drivers. Don't use new
1590 * EH stuff without converting to it.
1592 if (ap->ops->error_handler)
1593 tag = ATA_TAG_INTERNAL;
1597 if (test_and_set_bit(tag, &ap->qc_allocated))
1599 qc = __ata_qc_from_tag(ap, tag);
1607 preempted_tag = link->active_tag;
1608 preempted_sactive = link->sactive;
1609 preempted_qc_active = ap->qc_active;
1610 preempted_nr_active_links = ap->nr_active_links;
1611 link->active_tag = ATA_TAG_POISON;
1614 ap->nr_active_links = 0;
1616 /* prepare & issue qc */
1619 memcpy(qc->cdb, cdb, ATAPI_CDB_LEN);
1620 qc->flags |= ATA_QCFLAG_RESULT_TF;
1621 qc->dma_dir = dma_dir;
1622 if (dma_dir != DMA_NONE) {
1623 unsigned int i, buflen = 0;
1624 struct scatterlist *sg;
1626 for_each_sg(sgl, sg, n_elem, i)
1627 buflen += sg->length;
1629 ata_sg_init(qc, sgl, n_elem);
1630 qc->nbytes = buflen;
1633 qc->private_data = &wait;
1634 qc->complete_fn = ata_qc_complete_internal;
1638 spin_unlock_irqrestore(ap->lock, flags);
1641 timeout = ata_probe_timeout * 1000 / HZ;
1643 rc = wait_for_completion_timeout(&wait, msecs_to_jiffies(timeout));
1645 ata_port_flush_task(ap);
1648 spin_lock_irqsave(ap->lock, flags);
1650 /* We're racing with irq here. If we lose, the
1651 * following test prevents us from completing the qc
1652 * twice. If we win, the port is frozen and will be
1653 * cleaned up by ->post_internal_cmd().
1655 if (qc->flags & ATA_QCFLAG_ACTIVE) {
1656 qc->err_mask |= AC_ERR_TIMEOUT;
1658 if (ap->ops->error_handler)
1659 ata_port_freeze(ap);
1661 ata_qc_complete(qc);
1663 if (ata_msg_warn(ap))
1664 ata_dev_printk(dev, KERN_WARNING,
1665 "qc timeout (cmd 0x%x)\n", command);
1668 spin_unlock_irqrestore(ap->lock, flags);
1671 /* do post_internal_cmd */
1672 if (ap->ops->post_internal_cmd)
1673 ap->ops->post_internal_cmd(qc);
1675 /* perform minimal error analysis */
1676 if (qc->flags & ATA_QCFLAG_FAILED) {
1677 if (qc->result_tf.command & (ATA_ERR | ATA_DF))
1678 qc->err_mask |= AC_ERR_DEV;
1681 qc->err_mask |= AC_ERR_OTHER;
1683 if (qc->err_mask & ~AC_ERR_OTHER)
1684 qc->err_mask &= ~AC_ERR_OTHER;
1688 spin_lock_irqsave(ap->lock, flags);
1690 *tf = qc->result_tf;
1691 err_mask = qc->err_mask;
1694 link->active_tag = preempted_tag;
1695 link->sactive = preempted_sactive;
1696 ap->qc_active = preempted_qc_active;
1697 ap->nr_active_links = preempted_nr_active_links;
1699 /* XXX - Some LLDDs (sata_mv) disable port on command failure.
1700 * Until those drivers are fixed, we detect the condition
1701 * here, fail the command with AC_ERR_SYSTEM and reenable the
1704 * Note that this doesn't change any behavior as internal
1705 * command failure results in disabling the device in the
1706 * higher layer for LLDDs without new reset/EH callbacks.
1708 * Kill the following code as soon as those drivers are fixed.
1710 if (ap->flags & ATA_FLAG_DISABLED) {
1711 err_mask |= AC_ERR_SYSTEM;
1715 spin_unlock_irqrestore(ap->lock, flags);
1721 * ata_exec_internal - execute libata internal command
1722 * @dev: Device to which the command is sent
1723 * @tf: Taskfile registers for the command and the result
1724 * @cdb: CDB for packet command
1725 * @dma_dir: Data tranfer direction of the command
1726 * @buf: Data buffer of the command
1727 * @buflen: Length of data buffer
1728 * @timeout: Timeout in msecs (0 for default)
1730 * Wrapper around ata_exec_internal_sg() which takes simple
1731 * buffer instead of sg list.
1734 * None. Should be called with kernel context, might sleep.
1737 * Zero on success, AC_ERR_* mask on failure
1739 unsigned ata_exec_internal(struct ata_device *dev,
1740 struct ata_taskfile *tf, const u8 *cdb,
1741 int dma_dir, void *buf, unsigned int buflen,
1742 unsigned long timeout)
1744 struct scatterlist *psg = NULL, sg;
1745 unsigned int n_elem = 0;
1747 if (dma_dir != DMA_NONE) {
1749 sg_init_one(&sg, buf, buflen);
1754 return ata_exec_internal_sg(dev, tf, cdb, dma_dir, psg, n_elem,
1759 * ata_do_simple_cmd - execute simple internal command
1760 * @dev: Device to which the command is sent
1761 * @cmd: Opcode to execute
1763 * Execute a 'simple' command, that only consists of the opcode
1764 * 'cmd' itself, without filling any other registers
1767 * Kernel thread context (may sleep).
1770 * Zero on success, AC_ERR_* mask on failure
1772 unsigned int ata_do_simple_cmd(struct ata_device *dev, u8 cmd)
1774 struct ata_taskfile tf;
1776 ata_tf_init(dev, &tf);
1779 tf.flags |= ATA_TFLAG_DEVICE;
1780 tf.protocol = ATA_PROT_NODATA;
1782 return ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
1786 * ata_pio_need_iordy - check if iordy needed
1789 * Check if the current speed of the device requires IORDY. Used
1790 * by various controllers for chip configuration.
1793 unsigned int ata_pio_need_iordy(const struct ata_device *adev)
1795 /* Controller doesn't support IORDY. Probably a pointless check
1796 as the caller should know this */
1797 if (adev->link->ap->flags & ATA_FLAG_NO_IORDY)
1799 /* PIO3 and higher it is mandatory */
1800 if (adev->pio_mode > XFER_PIO_2)
1802 /* We turn it on when possible */
1803 if (ata_id_has_iordy(adev->id))
1809 * ata_pio_mask_no_iordy - Return the non IORDY mask
1812 * Compute the highest mode possible if we are not using iordy. Return
1813 * -1 if no iordy mode is available.
1816 static u32 ata_pio_mask_no_iordy(const struct ata_device *adev)
1818 /* If we have no drive specific rule, then PIO 2 is non IORDY */
1819 if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE */
1820 u16 pio = adev->id[ATA_ID_EIDE_PIO];
1821 /* Is the speed faster than the drive allows non IORDY ? */
1823 /* This is cycle times not frequency - watch the logic! */
1824 if (pio > 240) /* PIO2 is 240nS per cycle */
1825 return 3 << ATA_SHIFT_PIO;
1826 return 7 << ATA_SHIFT_PIO;
1829 return 3 << ATA_SHIFT_PIO;
1833 * ata_dev_read_id - Read ID data from the specified device
1834 * @dev: target device
1835 * @p_class: pointer to class of the target device (may be changed)
1836 * @flags: ATA_READID_* flags
1837 * @id: buffer to read IDENTIFY data into
1839 * Read ID data from the specified device. ATA_CMD_ID_ATA is
1840 * performed on ATA devices and ATA_CMD_ID_ATAPI on ATAPI
1841 * devices. This function also issues ATA_CMD_INIT_DEV_PARAMS
1842 * for pre-ATA4 drives.
1844 * FIXME: ATA_CMD_ID_ATA is optional for early drives and right
1845 * now we abort if we hit that case.
1848 * Kernel thread context (may sleep)
1851 * 0 on success, -errno otherwise.
1853 int ata_dev_read_id(struct ata_device *dev, unsigned int *p_class,
1854 unsigned int flags, u16 *id)
1856 struct ata_port *ap = dev->link->ap;
1857 unsigned int class = *p_class;
1858 struct ata_taskfile tf;
1859 unsigned int err_mask = 0;
1861 int may_fallback = 1, tried_spinup = 0;
1864 if (ata_msg_ctl(ap))
1865 ata_dev_printk(dev, KERN_DEBUG, "%s: ENTER\n", __FUNCTION__);
1867 ata_dev_select(ap, dev->devno, 1, 1); /* select device 0/1 */
1869 ata_tf_init(dev, &tf);
1873 tf.command = ATA_CMD_ID_ATA;
1876 tf.command = ATA_CMD_ID_ATAPI;
1880 reason = "unsupported class";
1884 tf.protocol = ATA_PROT_PIO;
1886 /* Some devices choke if TF registers contain garbage. Make
1887 * sure those are properly initialized.
1889 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
1891 /* Device presence detection is unreliable on some
1892 * controllers. Always poll IDENTIFY if available.
1894 tf.flags |= ATA_TFLAG_POLLING;
1896 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_FROM_DEVICE,
1897 id, sizeof(id[0]) * ATA_ID_WORDS, 0);
1899 if (err_mask & AC_ERR_NODEV_HINT) {
1900 DPRINTK("ata%u.%d: NODEV after polling detection\n",
1901 ap->print_id, dev->devno);
1905 /* Device or controller might have reported the wrong
1906 * device class. Give a shot at the other IDENTIFY if
1907 * the current one is aborted by the device.
1910 (err_mask == AC_ERR_DEV) && (tf.feature & ATA_ABORTED)) {
1913 if (class == ATA_DEV_ATA)
1914 class = ATA_DEV_ATAPI;
1916 class = ATA_DEV_ATA;
1921 reason = "I/O error";
1925 /* Falling back doesn't make sense if ID data was read
1926 * successfully at least once.
1930 swap_buf_le16(id, ATA_ID_WORDS);
1934 reason = "device reports invalid type";
1936 if (class == ATA_DEV_ATA) {
1937 if (!ata_id_is_ata(id) && !ata_id_is_cfa(id))
1940 if (ata_id_is_ata(id))
1944 if (!tried_spinup && (id[2] == 0x37c8 || id[2] == 0x738c)) {
1947 * Drive powered-up in standby mode, and requires a specific
1948 * SET_FEATURES spin-up subcommand before it will accept
1949 * anything other than the original IDENTIFY command.
1951 err_mask = ata_dev_set_feature(dev, SETFEATURES_SPINUP, 0);
1952 if (err_mask && id[2] != 0x738c) {
1954 reason = "SPINUP failed";
1958 * If the drive initially returned incomplete IDENTIFY info,
1959 * we now must reissue the IDENTIFY command.
1961 if (id[2] == 0x37c8)
1965 if ((flags & ATA_READID_POSTRESET) && class == ATA_DEV_ATA) {
1967 * The exact sequence expected by certain pre-ATA4 drives is:
1969 * IDENTIFY (optional in early ATA)
1970 * INITIALIZE DEVICE PARAMETERS (later IDE and ATA)
1972 * Some drives were very specific about that exact sequence.
1974 * Note that ATA4 says lba is mandatory so the second check
1975 * shoud never trigger.
1977 if (ata_id_major_version(id) < 4 || !ata_id_has_lba(id)) {
1978 err_mask = ata_dev_init_params(dev, id[3], id[6]);
1981 reason = "INIT_DEV_PARAMS failed";
1985 /* current CHS translation info (id[53-58]) might be
1986 * changed. reread the identify device info.
1988 flags &= ~ATA_READID_POSTRESET;
1998 if (ata_msg_warn(ap))
1999 ata_dev_printk(dev, KERN_WARNING, "failed to IDENTIFY "
2000 "(%s, err_mask=0x%x)\n", reason, err_mask);
2004 static inline u8 ata_dev_knobble(struct ata_device *dev)
2006 struct ata_port *ap = dev->link->ap;
2007 return ((ap->cbl == ATA_CBL_SATA) && (!ata_id_is_sata(dev->id)));
2010 static void ata_dev_config_ncq(struct ata_device *dev,
2011 char *desc, size_t desc_sz)
2013 struct ata_port *ap = dev->link->ap;
2014 int hdepth = 0, ddepth = ata_id_queue_depth(dev->id);
2016 if (!ata_id_has_ncq(dev->id)) {
2020 if (dev->horkage & ATA_HORKAGE_NONCQ) {
2021 snprintf(desc, desc_sz, "NCQ (not used)");
2024 if (ap->flags & ATA_FLAG_NCQ) {
2025 hdepth = min(ap->scsi_host->can_queue, ATA_MAX_QUEUE - 1);
2026 dev->flags |= ATA_DFLAG_NCQ;
2029 if (hdepth >= ddepth)
2030 snprintf(desc, desc_sz, "NCQ (depth %d)", ddepth);
2032 snprintf(desc, desc_sz, "NCQ (depth %d/%d)", hdepth, ddepth);
2036 * ata_dev_configure - Configure the specified ATA/ATAPI device
2037 * @dev: Target device to configure
2039 * Configure @dev according to @dev->id. Generic and low-level
2040 * driver specific fixups are also applied.
2043 * Kernel thread context (may sleep)
2046 * 0 on success, -errno otherwise
2048 int ata_dev_configure(struct ata_device *dev)
2050 struct ata_port *ap = dev->link->ap;
2051 struct ata_eh_context *ehc = &dev->link->eh_context;
2052 int print_info = ehc->i.flags & ATA_EHI_PRINTINFO;
2053 const u16 *id = dev->id;
2054 unsigned long xfer_mask;
2055 char revbuf[7]; /* XYZ-99\0 */
2056 char fwrevbuf[ATA_ID_FW_REV_LEN+1];
2057 char modelbuf[ATA_ID_PROD_LEN+1];
2060 if (!ata_dev_enabled(dev) && ata_msg_info(ap)) {
2061 ata_dev_printk(dev, KERN_INFO, "%s: ENTER/EXIT -- nodev\n",
2066 if (ata_msg_probe(ap))
2067 ata_dev_printk(dev, KERN_DEBUG, "%s: ENTER\n", __FUNCTION__);
2070 dev->horkage |= ata_dev_blacklisted(dev);
2072 /* let ACPI work its magic */
2073 rc = ata_acpi_on_devcfg(dev);
2077 /* massage HPA, do it early as it might change IDENTIFY data */
2078 rc = ata_hpa_resize(dev);
2082 /* print device capabilities */
2083 if (ata_msg_probe(ap))
2084 ata_dev_printk(dev, KERN_DEBUG,
2085 "%s: cfg 49:%04x 82:%04x 83:%04x 84:%04x "
2086 "85:%04x 86:%04x 87:%04x 88:%04x\n",
2088 id[49], id[82], id[83], id[84],
2089 id[85], id[86], id[87], id[88]);
2091 /* initialize to-be-configured parameters */
2092 dev->flags &= ~ATA_DFLAG_CFG_MASK;
2093 dev->max_sectors = 0;
2101 * common ATA, ATAPI feature tests
2104 /* find max transfer mode; for printk only */
2105 xfer_mask = ata_id_xfermask(id);
2107 if (ata_msg_probe(ap))
2110 /* SCSI only uses 4-char revisions, dump full 8 chars from ATA */
2111 ata_id_c_string(dev->id, fwrevbuf, ATA_ID_FW_REV,
2114 ata_id_c_string(dev->id, modelbuf, ATA_ID_PROD,
2117 /* ATA-specific feature tests */
2118 if (dev->class == ATA_DEV_ATA) {
2119 if (ata_id_is_cfa(id)) {
2120 if (id[162] & 1) /* CPRM may make this media unusable */
2121 ata_dev_printk(dev, KERN_WARNING,
2122 "supports DRM functions and may "
2123 "not be fully accessable.\n");
2124 snprintf(revbuf, 7, "CFA");
2126 snprintf(revbuf, 7, "ATA-%d", ata_id_major_version(id));
2127 /* Warn the user if the device has TPM extensions */
2128 if (ata_id_has_tpm(id))
2129 ata_dev_printk(dev, KERN_WARNING,
2130 "supports DRM functions and may "
2131 "not be fully accessable.\n");
2134 dev->n_sectors = ata_id_n_sectors(id);
2136 if (dev->id[59] & 0x100)
2137 dev->multi_count = dev->id[59] & 0xff;
2139 if (ata_id_has_lba(id)) {
2140 const char *lba_desc;
2144 dev->flags |= ATA_DFLAG_LBA;
2145 if (ata_id_has_lba48(id)) {
2146 dev->flags |= ATA_DFLAG_LBA48;
2149 if (dev->n_sectors >= (1UL << 28) &&
2150 ata_id_has_flush_ext(id))
2151 dev->flags |= ATA_DFLAG_FLUSH_EXT;
2155 ata_dev_config_ncq(dev, ncq_desc, sizeof(ncq_desc));
2157 /* print device info to dmesg */
2158 if (ata_msg_drv(ap) && print_info) {
2159 ata_dev_printk(dev, KERN_INFO,
2160 "%s: %s, %s, max %s\n",
2161 revbuf, modelbuf, fwrevbuf,
2162 ata_mode_string(xfer_mask));
2163 ata_dev_printk(dev, KERN_INFO,
2164 "%Lu sectors, multi %u: %s %s\n",
2165 (unsigned long long)dev->n_sectors,
2166 dev->multi_count, lba_desc, ncq_desc);
2171 /* Default translation */
2172 dev->cylinders = id[1];
2174 dev->sectors = id[6];
2176 if (ata_id_current_chs_valid(id)) {
2177 /* Current CHS translation is valid. */
2178 dev->cylinders = id[54];
2179 dev->heads = id[55];
2180 dev->sectors = id[56];
2183 /* print device info to dmesg */
2184 if (ata_msg_drv(ap) && print_info) {
2185 ata_dev_printk(dev, KERN_INFO,
2186 "%s: %s, %s, max %s\n",
2187 revbuf, modelbuf, fwrevbuf,
2188 ata_mode_string(xfer_mask));
2189 ata_dev_printk(dev, KERN_INFO,
2190 "%Lu sectors, multi %u, CHS %u/%u/%u\n",
2191 (unsigned long long)dev->n_sectors,
2192 dev->multi_count, dev->cylinders,
2193 dev->heads, dev->sectors);
2200 /* ATAPI-specific feature tests */
2201 else if (dev->class == ATA_DEV_ATAPI) {
2202 const char *cdb_intr_string = "";
2203 const char *atapi_an_string = "";
2206 rc = atapi_cdb_len(id);
2207 if ((rc < 12) || (rc > ATAPI_CDB_LEN)) {
2208 if (ata_msg_warn(ap))
2209 ata_dev_printk(dev, KERN_WARNING,
2210 "unsupported CDB len\n");
2214 dev->cdb_len = (unsigned int) rc;
2216 /* Enable ATAPI AN if both the host and device have
2217 * the support. If PMP is attached, SNTF is required
2218 * to enable ATAPI AN to discern between PHY status
2219 * changed notifications and ATAPI ANs.
2221 if ((ap->flags & ATA_FLAG_AN) && ata_id_has_atapi_AN(id) &&
2222 (!ap->nr_pmp_links ||
2223 sata_scr_read(&ap->link, SCR_NOTIFICATION, &sntf) == 0)) {
2224 unsigned int err_mask;
2226 /* issue SET feature command to turn this on */
2227 err_mask = ata_dev_set_feature(dev,
2228 SETFEATURES_SATA_ENABLE, SATA_AN);
2230 ata_dev_printk(dev, KERN_ERR,
2231 "failed to enable ATAPI AN "
2232 "(err_mask=0x%x)\n", err_mask);
2234 dev->flags |= ATA_DFLAG_AN;
2235 atapi_an_string = ", ATAPI AN";
2239 if (ata_id_cdb_intr(dev->id)) {
2240 dev->flags |= ATA_DFLAG_CDB_INTR;
2241 cdb_intr_string = ", CDB intr";
2244 /* print device info to dmesg */
2245 if (ata_msg_drv(ap) && print_info)
2246 ata_dev_printk(dev, KERN_INFO,
2247 "ATAPI: %s, %s, max %s%s%s\n",
2249 ata_mode_string(xfer_mask),
2250 cdb_intr_string, atapi_an_string);
2253 /* determine max_sectors */
2254 dev->max_sectors = ATA_MAX_SECTORS;
2255 if (dev->flags & ATA_DFLAG_LBA48)
2256 dev->max_sectors = ATA_MAX_SECTORS_LBA48;
2258 if (!(dev->horkage & ATA_HORKAGE_IPM)) {
2259 if (ata_id_has_hipm(dev->id))
2260 dev->flags |= ATA_DFLAG_HIPM;
2261 if (ata_id_has_dipm(dev->id))
2262 dev->flags |= ATA_DFLAG_DIPM;
2265 if (dev->horkage & ATA_HORKAGE_DIAGNOSTIC) {
2266 /* Let the user know. We don't want to disallow opens for
2267 rescue purposes, or in case the vendor is just a blithering
2270 ata_dev_printk(dev, KERN_WARNING,
2271 "Drive reports diagnostics failure. This may indicate a drive\n");
2272 ata_dev_printk(dev, KERN_WARNING,
2273 "fault or invalid emulation. Contact drive vendor for information.\n");
2277 /* limit bridge transfers to udma5, 200 sectors */
2278 if (ata_dev_knobble(dev)) {
2279 if (ata_msg_drv(ap) && print_info)
2280 ata_dev_printk(dev, KERN_INFO,
2281 "applying bridge limits\n");
2282 dev->udma_mask &= ATA_UDMA5;
2283 dev->max_sectors = ATA_MAX_SECTORS;
2286 if ((dev->class == ATA_DEV_ATAPI) &&
2287 (atapi_command_packet_set(id) == TYPE_TAPE)) {
2288 dev->max_sectors = ATA_MAX_SECTORS_TAPE;
2289 dev->horkage |= ATA_HORKAGE_STUCK_ERR;
2292 if (dev->horkage & ATA_HORKAGE_MAX_SEC_128)
2293 dev->max_sectors = min_t(unsigned int, ATA_MAX_SECTORS_128,
2296 if (ata_dev_blacklisted(dev) & ATA_HORKAGE_IPM) {
2297 dev->horkage |= ATA_HORKAGE_IPM;
2299 /* reset link pm_policy for this port to no pm */
2300 ap->pm_policy = MAX_PERFORMANCE;
2303 if (ap->ops->dev_config)
2304 ap->ops->dev_config(dev);
2306 if (ata_msg_probe(ap))
2307 ata_dev_printk(dev, KERN_DEBUG, "%s: EXIT, drv_stat = 0x%x\n",
2308 __FUNCTION__, ata_chk_status(ap));
2312 if (ata_msg_probe(ap))
2313 ata_dev_printk(dev, KERN_DEBUG,
2314 "%s: EXIT, err\n", __FUNCTION__);
2319 * ata_cable_40wire - return 40 wire cable type
2322 * Helper method for drivers which want to hardwire 40 wire cable
2326 int ata_cable_40wire(struct ata_port *ap)
2328 return ATA_CBL_PATA40;
2332 * ata_cable_80wire - return 80 wire cable type
2335 * Helper method for drivers which want to hardwire 80 wire cable
2339 int ata_cable_80wire(struct ata_port *ap)
2341 return ATA_CBL_PATA80;
2345 * ata_cable_unknown - return unknown PATA cable.
2348 * Helper method for drivers which have no PATA cable detection.
2351 int ata_cable_unknown(struct ata_port *ap)
2353 return ATA_CBL_PATA_UNK;
2357 * ata_cable_ignore - return ignored PATA cable.
2360 * Helper method for drivers which don't use cable type to limit
2363 int ata_cable_ignore(struct ata_port *ap)
2365 return ATA_CBL_PATA_IGN;
2369 * ata_cable_sata - return SATA cable type
2372 * Helper method for drivers which have SATA cables
2375 int ata_cable_sata(struct ata_port *ap)
2377 return ATA_CBL_SATA;
2381 * ata_bus_probe - Reset and probe ATA bus
2384 * Master ATA bus probing function. Initiates a hardware-dependent
2385 * bus reset, then attempts to identify any devices found on
2389 * PCI/etc. bus probe sem.
2392 * Zero on success, negative errno otherwise.
2395 int ata_bus_probe(struct ata_port *ap)
2397 unsigned int classes[ATA_MAX_DEVICES];
2398 int tries[ATA_MAX_DEVICES];
2400 struct ata_device *dev;
2404 ata_link_for_each_dev(dev, &ap->link)
2405 tries[dev->devno] = ATA_PROBE_MAX_TRIES;
2408 ata_link_for_each_dev(dev, &ap->link) {
2409 /* If we issue an SRST then an ATA drive (not ATAPI)
2410 * may change configuration and be in PIO0 timing. If
2411 * we do a hard reset (or are coming from power on)
2412 * this is true for ATA or ATAPI. Until we've set a
2413 * suitable controller mode we should not touch the
2414 * bus as we may be talking too fast.
2416 dev->pio_mode = XFER_PIO_0;
2418 /* If the controller has a pio mode setup function
2419 * then use it to set the chipset to rights. Don't
2420 * touch the DMA setup as that will be dealt with when
2421 * configuring devices.
2423 if (ap->ops->set_piomode)
2424 ap->ops->set_piomode(ap, dev);
2427 /* reset and determine device classes */
2428 ap->ops->phy_reset(ap);
2430 ata_link_for_each_dev(dev, &ap->link) {
2431 if (!(ap->flags & ATA_FLAG_DISABLED) &&
2432 dev->class != ATA_DEV_UNKNOWN)
2433 classes[dev->devno] = dev->class;
2435 classes[dev->devno] = ATA_DEV_NONE;
2437 dev->class = ATA_DEV_UNKNOWN;
2442 /* read IDENTIFY page and configure devices. We have to do the identify
2443 specific sequence bass-ackwards so that PDIAG- is released by
2446 ata_link_for_each_dev(dev, &ap->link) {
2447 if (tries[dev->devno])
2448 dev->class = classes[dev->devno];
2450 if (!ata_dev_enabled(dev))
2453 rc = ata_dev_read_id(dev, &dev->class, ATA_READID_POSTRESET,
2459 /* Now ask for the cable type as PDIAG- should have been released */
2460 if (ap->ops->cable_detect)
2461 ap->cbl = ap->ops->cable_detect(ap);
2463 /* We may have SATA bridge glue hiding here irrespective of the
2464 reported cable types and sensed types */
2465 ata_link_for_each_dev(dev, &ap->link) {
2466 if (!ata_dev_enabled(dev))
2468 /* SATA drives indicate we have a bridge. We don't know which
2469 end of the link the bridge is which is a problem */
2470 if (ata_id_is_sata(dev->id))
2471 ap->cbl = ATA_CBL_SATA;
2474 /* After the identify sequence we can now set up the devices. We do
2475 this in the normal order so that the user doesn't get confused */
2477 ata_link_for_each_dev(dev, &ap->link) {
2478 if (!ata_dev_enabled(dev))
2481 ap->link.eh_context.i.flags |= ATA_EHI_PRINTINFO;
2482 rc = ata_dev_configure(dev);
2483 ap->link.eh_context.i.flags &= ~ATA_EHI_PRINTINFO;
2488 /* configure transfer mode */
2489 rc = ata_set_mode(&ap->link, &dev);
2493 ata_link_for_each_dev(dev, &ap->link)
2494 if (ata_dev_enabled(dev))
2497 /* no device present, disable port */
2498 ata_port_disable(ap);
2502 tries[dev->devno]--;
2506 /* eeek, something went very wrong, give up */
2507 tries[dev->devno] = 0;
2511 /* give it just one more chance */
2512 tries[dev->devno] = min(tries[dev->devno], 1);
2514 if (tries[dev->devno] == 1) {
2515 /* This is the last chance, better to slow
2516 * down than lose it.
2518 sata_down_spd_limit(&ap->link);
2519 ata_down_xfermask_limit(dev, ATA_DNXFER_PIO);
2523 if (!tries[dev->devno])
2524 ata_dev_disable(dev);
2530 * ata_port_probe - Mark port as enabled
2531 * @ap: Port for which we indicate enablement
2533 * Modify @ap data structure such that the system
2534 * thinks that the entire port is enabled.
2536 * LOCKING: host lock, or some other form of
2540 void ata_port_probe(struct ata_port *ap)
2542 ap->flags &= ~ATA_FLAG_DISABLED;
2546 * sata_print_link_status - Print SATA link status
2547 * @link: SATA link to printk link status about
2549 * This function prints link speed and status of a SATA link.
2554 void sata_print_link_status(struct ata_link *link)
2556 u32 sstatus, scontrol, tmp;
2558 if (sata_scr_read(link, SCR_STATUS, &sstatus))
2560 sata_scr_read(link, SCR_CONTROL, &scontrol);
2562 if (ata_link_online(link)) {
2563 tmp = (sstatus >> 4) & 0xf;
2564 ata_link_printk(link, KERN_INFO,
2565 "SATA link up %s (SStatus %X SControl %X)\n",
2566 sata_spd_string(tmp), sstatus, scontrol);
2568 ata_link_printk(link, KERN_INFO,
2569 "SATA link down (SStatus %X SControl %X)\n",
2575 * ata_dev_pair - return other device on cable
2578 * Obtain the other device on the same cable, or if none is
2579 * present NULL is returned
2582 struct ata_device *ata_dev_pair(struct ata_device *adev)
2584 struct ata_link *link = adev->link;
2585 struct ata_device *pair = &link->device[1 - adev->devno];
2586 if (!ata_dev_enabled(pair))
2592 * ata_port_disable - Disable port.
2593 * @ap: Port to be disabled.
2595 * Modify @ap data structure such that the system
2596 * thinks that the entire port is disabled, and should
2597 * never attempt to probe or communicate with devices
2600 * LOCKING: host lock, or some other form of
2604 void ata_port_disable(struct ata_port *ap)
2606 ap->link.device[0].class = ATA_DEV_NONE;
2607 ap->link.device[1].class = ATA_DEV_NONE;
2608 ap->flags |= ATA_FLAG_DISABLED;
2612 * sata_down_spd_limit - adjust SATA spd limit downward
2613 * @link: Link to adjust SATA spd limit for
2615 * Adjust SATA spd limit of @link downward. Note that this
2616 * function only adjusts the limit. The change must be applied
2617 * using sata_set_spd().
2620 * Inherited from caller.
2623 * 0 on success, negative errno on failure
2625 int sata_down_spd_limit(struct ata_link *link)
2627 u32 sstatus, spd, mask;
2630 if (!sata_scr_valid(link))
2633 /* If SCR can be read, use it to determine the current SPD.
2634 * If not, use cached value in link->sata_spd.
2636 rc = sata_scr_read(link, SCR_STATUS, &sstatus);
2638 spd = (sstatus >> 4) & 0xf;
2640 spd = link->sata_spd;
2642 mask = link->sata_spd_limit;
2646 /* unconditionally mask off the highest bit */
2647 highbit = fls(mask) - 1;
2648 mask &= ~(1 << highbit);
2650 /* Mask off all speeds higher than or equal to the current
2651 * one. Force 1.5Gbps if current SPD is not available.
2654 mask &= (1 << (spd - 1)) - 1;
2658 /* were we already at the bottom? */
2662 link->sata_spd_limit = mask;
2664 ata_link_printk(link, KERN_WARNING, "limiting SATA link speed to %s\n",
2665 sata_spd_string(fls(mask)));
2670 static int __sata_set_spd_needed(struct ata_link *link, u32 *scontrol)
2672 struct ata_link *host_link = &link->ap->link;
2673 u32 limit, target, spd;
2675 limit = link->sata_spd_limit;
2677 /* Don't configure downstream link faster than upstream link.
2678 * It doesn't speed up anything and some PMPs choke on such
2681 if (!ata_is_host_link(link) && host_link->sata_spd)
2682 limit &= (1 << host_link->sata_spd) - 1;
2684 if (limit == UINT_MAX)
2687 target = fls(limit);
2689 spd = (*scontrol >> 4) & 0xf;
2690 *scontrol = (*scontrol & ~0xf0) | ((target & 0xf) << 4);
2692 return spd != target;
2696 * sata_set_spd_needed - is SATA spd configuration needed
2697 * @link: Link in question
2699 * Test whether the spd limit in SControl matches
2700 * @link->sata_spd_limit. This function is used to determine
2701 * whether hardreset is necessary to apply SATA spd
2705 * Inherited from caller.
2708 * 1 if SATA spd configuration is needed, 0 otherwise.
2710 int sata_set_spd_needed(struct ata_link *link)
2714 if (sata_scr_read(link, SCR_CONTROL, &scontrol))
2717 return __sata_set_spd_needed(link, &scontrol);
2721 * sata_set_spd - set SATA spd according to spd limit
2722 * @link: Link to set SATA spd for
2724 * Set SATA spd of @link according to sata_spd_limit.
2727 * Inherited from caller.
2730 * 0 if spd doesn't need to be changed, 1 if spd has been
2731 * changed. Negative errno if SCR registers are inaccessible.
2733 int sata_set_spd(struct ata_link *link)
2738 if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
2741 if (!__sata_set_spd_needed(link, &scontrol))
2744 if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol)))
2751 * This mode timing computation functionality is ported over from
2752 * drivers/ide/ide-timing.h and was originally written by Vojtech Pavlik
2755 * PIO 0-4, MWDMA 0-2 and UDMA 0-6 timings (in nanoseconds).
2756 * These were taken from ATA/ATAPI-6 standard, rev 0a, except
2757 * for UDMA6, which is currently supported only by Maxtor drives.
2759 * For PIO 5/6 MWDMA 3/4 see the CFA specification 3.0.
2762 static const struct ata_timing ata_timing[] = {
2763 /* { XFER_PIO_SLOW, 120, 290, 240, 960, 290, 240, 960, 0 }, */
2764 { XFER_PIO_0, 70, 290, 240, 600, 165, 150, 600, 0 },
2765 { XFER_PIO_1, 50, 290, 93, 383, 125, 100, 383, 0 },
2766 { XFER_PIO_2, 30, 290, 40, 330, 100, 90, 240, 0 },
2767 { XFER_PIO_3, 30, 80, 70, 180, 80, 70, 180, 0 },
2768 { XFER_PIO_4, 25, 70, 25, 120, 70, 25, 120, 0 },
2769 { XFER_PIO_5, 15, 65, 25, 100, 65, 25, 100, 0 },
2770 { XFER_PIO_6, 10, 55, 20, 80, 55, 20, 80, 0 },
2772 { XFER_SW_DMA_0, 120, 0, 0, 0, 480, 480, 960, 0 },
2773 { XFER_SW_DMA_1, 90, 0, 0, 0, 240, 240, 480, 0 },
2774 { XFER_SW_DMA_2, 60, 0, 0, 0, 120, 120, 240, 0 },
2776 { XFER_MW_DMA_0, 60, 0, 0, 0, 215, 215, 480, 0 },
2777 { XFER_MW_DMA_1, 45, 0, 0, 0, 80, 50, 150, 0 },
2778 { XFER_MW_DMA_2, 25, 0, 0, 0, 70, 25, 120, 0 },
2779 { XFER_MW_DMA_3, 25, 0, 0, 0, 65, 25, 100, 0 },
2780 { XFER_MW_DMA_4, 25, 0, 0, 0, 55, 20, 80, 0 },
2782 /* { XFER_UDMA_SLOW, 0, 0, 0, 0, 0, 0, 0, 150 }, */
2783 { XFER_UDMA_0, 0, 0, 0, 0, 0, 0, 0, 120 },
2784 { XFER_UDMA_1, 0, 0, 0, 0, 0, 0, 0, 80 },
2785 { XFER_UDMA_2, 0, 0, 0, 0, 0, 0, 0, 60 },
2786 { XFER_UDMA_3, 0, 0, 0, 0, 0, 0, 0, 45 },
2787 { XFER_UDMA_4, 0, 0, 0, 0, 0, 0, 0, 30 },
2788 { XFER_UDMA_5, 0, 0, 0, 0, 0, 0, 0, 20 },
2789 { XFER_UDMA_6, 0, 0, 0, 0, 0, 0, 0, 15 },
2794 #define ENOUGH(v, unit) (((v)-1)/(unit)+1)
2795 #define EZ(v, unit) ((v)?ENOUGH(v, unit):0)
2797 static void ata_timing_quantize(const struct ata_timing *t, struct ata_timing *q, int T, int UT)
2799 q->setup = EZ(t->setup * 1000, T);
2800 q->act8b = EZ(t->act8b * 1000, T);
2801 q->rec8b = EZ(t->rec8b * 1000, T);
2802 q->cyc8b = EZ(t->cyc8b * 1000, T);
2803 q->active = EZ(t->active * 1000, T);
2804 q->recover = EZ(t->recover * 1000, T);
2805 q->cycle = EZ(t->cycle * 1000, T);
2806 q->udma = EZ(t->udma * 1000, UT);
2809 void ata_timing_merge(const struct ata_timing *a, const struct ata_timing *b,
2810 struct ata_timing *m, unsigned int what)
2812 if (what & ATA_TIMING_SETUP ) m->setup = max(a->setup, b->setup);
2813 if (what & ATA_TIMING_ACT8B ) m->act8b = max(a->act8b, b->act8b);
2814 if (what & ATA_TIMING_REC8B ) m->rec8b = max(a->rec8b, b->rec8b);
2815 if (what & ATA_TIMING_CYC8B ) m->cyc8b = max(a->cyc8b, b->cyc8b);
2816 if (what & ATA_TIMING_ACTIVE ) m->active = max(a->active, b->active);
2817 if (what & ATA_TIMING_RECOVER) m->recover = max(a->recover, b->recover);
2818 if (what & ATA_TIMING_CYCLE ) m->cycle = max(a->cycle, b->cycle);
2819 if (what & ATA_TIMING_UDMA ) m->udma = max(a->udma, b->udma);
2822 const struct ata_timing *ata_timing_find_mode(u8 xfer_mode)
2824 const struct ata_timing *t = ata_timing;
2826 while (xfer_mode > t->mode)
2829 if (xfer_mode == t->mode)
2834 int ata_timing_compute(struct ata_device *adev, unsigned short speed,
2835 struct ata_timing *t, int T, int UT)
2837 const struct ata_timing *s;
2838 struct ata_timing p;
2844 if (!(s = ata_timing_find_mode(speed)))
2847 memcpy(t, s, sizeof(*s));
2850 * If the drive is an EIDE drive, it can tell us it needs extended
2851 * PIO/MW_DMA cycle timing.
2854 if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE drive */
2855 memset(&p, 0, sizeof(p));
2856 if (speed >= XFER_PIO_0 && speed <= XFER_SW_DMA_0) {
2857 if (speed <= XFER_PIO_2) p.cycle = p.cyc8b = adev->id[ATA_ID_EIDE_PIO];
2858 else p.cycle = p.cyc8b = adev->id[ATA_ID_EIDE_PIO_IORDY];
2859 } else if (speed >= XFER_MW_DMA_0 && speed <= XFER_MW_DMA_2) {
2860 p.cycle = adev->id[ATA_ID_EIDE_DMA_MIN];
2862 ata_timing_merge(&p, t, t, ATA_TIMING_CYCLE | ATA_TIMING_CYC8B);
2866 * Convert the timing to bus clock counts.
2869 ata_timing_quantize(t, t, T, UT);
2872 * Even in DMA/UDMA modes we still use PIO access for IDENTIFY,
2873 * S.M.A.R.T * and some other commands. We have to ensure that the
2874 * DMA cycle timing is slower/equal than the fastest PIO timing.
2877 if (speed > XFER_PIO_6) {
2878 ata_timing_compute(adev, adev->pio_mode, &p, T, UT);
2879 ata_timing_merge(&p, t, t, ATA_TIMING_ALL);
2883 * Lengthen active & recovery time so that cycle time is correct.
2886 if (t->act8b + t->rec8b < t->cyc8b) {
2887 t->act8b += (t->cyc8b - (t->act8b + t->rec8b)) / 2;
2888 t->rec8b = t->cyc8b - t->act8b;
2891 if (t->active + t->recover < t->cycle) {
2892 t->active += (t->cycle - (t->active + t->recover)) / 2;
2893 t->recover = t->cycle - t->active;
2896 /* In a few cases quantisation may produce enough errors to
2897 leave t->cycle too low for the sum of active and recovery
2898 if so we must correct this */
2899 if (t->active + t->recover > t->cycle)
2900 t->cycle = t->active + t->recover;
2906 * ata_timing_cycle2mode - find xfer mode for the specified cycle duration
2907 * @xfer_shift: ATA_SHIFT_* value for transfer type to examine.
2908 * @cycle: cycle duration in ns
2910 * Return matching xfer mode for @cycle. The returned mode is of
2911 * the transfer type specified by @xfer_shift. If @cycle is too
2912 * slow for @xfer_shift, 0xff is returned. If @cycle is faster
2913 * than the fastest known mode, the fasted mode is returned.
2919 * Matching xfer_mode, 0xff if no match found.
2921 u8 ata_timing_cycle2mode(unsigned int xfer_shift, int cycle)
2923 u8 base_mode = 0xff, last_mode = 0xff;
2924 const struct ata_xfer_ent *ent;
2925 const struct ata_timing *t;
2927 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
2928 if (ent->shift == xfer_shift)
2929 base_mode = ent->base;
2931 for (t = ata_timing_find_mode(base_mode);
2932 t && ata_xfer_mode2shift(t->mode) == xfer_shift; t++) {
2933 unsigned short this_cycle;
2935 switch (xfer_shift) {
2937 case ATA_SHIFT_MWDMA:
2938 this_cycle = t->cycle;
2940 case ATA_SHIFT_UDMA:
2941 this_cycle = t->udma;
2947 if (cycle > this_cycle)
2950 last_mode = t->mode;
2957 * ata_down_xfermask_limit - adjust dev xfer masks downward
2958 * @dev: Device to adjust xfer masks
2959 * @sel: ATA_DNXFER_* selector
2961 * Adjust xfer masks of @dev downward. Note that this function
2962 * does not apply the change. Invoking ata_set_mode() afterwards
2963 * will apply the limit.
2966 * Inherited from caller.
2969 * 0 on success, negative errno on failure
2971 int ata_down_xfermask_limit(struct ata_device *dev, unsigned int sel)
2974 unsigned long orig_mask, xfer_mask;
2975 unsigned long pio_mask, mwdma_mask, udma_mask;
2978 quiet = !!(sel & ATA_DNXFER_QUIET);
2979 sel &= ~ATA_DNXFER_QUIET;
2981 xfer_mask = orig_mask = ata_pack_xfermask(dev->pio_mask,
2984 ata_unpack_xfermask(xfer_mask, &pio_mask, &mwdma_mask, &udma_mask);
2987 case ATA_DNXFER_PIO:
2988 highbit = fls(pio_mask) - 1;
2989 pio_mask &= ~(1 << highbit);
2992 case ATA_DNXFER_DMA:
2994 highbit = fls(udma_mask) - 1;
2995 udma_mask &= ~(1 << highbit);
2998 } else if (mwdma_mask) {
2999 highbit = fls(mwdma_mask) - 1;
3000 mwdma_mask &= ~(1 << highbit);
3006 case ATA_DNXFER_40C:
3007 udma_mask &= ATA_UDMA_MASK_40C;
3010 case ATA_DNXFER_FORCE_PIO0:
3012 case ATA_DNXFER_FORCE_PIO:
3021 xfer_mask &= ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask);
3023 if (!(xfer_mask & ATA_MASK_PIO) || xfer_mask == orig_mask)
3027 if (xfer_mask & (ATA_MASK_MWDMA | ATA_MASK_UDMA))
3028 snprintf(buf, sizeof(buf), "%s:%s",
3029 ata_mode_string(xfer_mask),
3030 ata_mode_string(xfer_mask & ATA_MASK_PIO));
3032 snprintf(buf, sizeof(buf), "%s",
3033 ata_mode_string(xfer_mask));
3035 ata_dev_printk(dev, KERN_WARNING,
3036 "limiting speed to %s\n", buf);
3039 ata_unpack_xfermask(xfer_mask, &dev->pio_mask, &dev->mwdma_mask,
3045 static int ata_dev_set_mode(struct ata_device *dev)
3047 struct ata_eh_context *ehc = &dev->link->eh_context;
3048 unsigned int err_mask;
3051 dev->flags &= ~ATA_DFLAG_PIO;
3052 if (dev->xfer_shift == ATA_SHIFT_PIO)
3053 dev->flags |= ATA_DFLAG_PIO;
3055 err_mask = ata_dev_set_xfermode(dev);
3057 /* Old CFA may refuse this command, which is just fine */
3058 if (dev->xfer_shift == ATA_SHIFT_PIO && ata_id_is_cfa(dev->id))
3059 err_mask &= ~AC_ERR_DEV;
3061 /* Some very old devices and some bad newer ones fail any kind of
3062 SET_XFERMODE request but support PIO0-2 timings and no IORDY */
3063 if (dev->xfer_shift == ATA_SHIFT_PIO && !ata_id_has_iordy(dev->id) &&
3064 dev->pio_mode <= XFER_PIO_2)
3065 err_mask &= ~AC_ERR_DEV;
3067 /* Early MWDMA devices do DMA but don't allow DMA mode setting.
3068 Don't fail an MWDMA0 set IFF the device indicates it is in MWDMA0 */
3069 if (dev->xfer_shift == ATA_SHIFT_MWDMA &&
3070 dev->dma_mode == XFER_MW_DMA_0 &&
3071 (dev->id[63] >> 8) & 1)
3072 err_mask &= ~AC_ERR_DEV;
3075 ata_dev_printk(dev, KERN_ERR, "failed to set xfermode "
3076 "(err_mask=0x%x)\n", err_mask);
3080 ehc->i.flags |= ATA_EHI_POST_SETMODE;
3081 rc = ata_dev_revalidate(dev, ATA_DEV_UNKNOWN, 0);
3082 ehc->i.flags &= ~ATA_EHI_POST_SETMODE;
3086 DPRINTK("xfer_shift=%u, xfer_mode=0x%x\n",
3087 dev->xfer_shift, (int)dev->xfer_mode);
3089 ata_dev_printk(dev, KERN_INFO, "configured for %s\n",
3090 ata_mode_string(ata_xfer_mode2mask(dev->xfer_mode)));
3095 * ata_do_set_mode - Program timings and issue SET FEATURES - XFER
3096 * @link: link on which timings will be programmed
3097 * @r_failed_dev: out paramter for failed device
3099 * Standard implementation of the function used to tune and set
3100 * ATA device disk transfer mode (PIO3, UDMA6, etc.). If
3101 * ata_dev_set_mode() fails, pointer to the failing device is
3102 * returned in @r_failed_dev.
3105 * PCI/etc. bus probe sem.
3108 * 0 on success, negative errno otherwise
3111 int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev)
3113 struct ata_port *ap = link->ap;
3114 struct ata_device *dev;
3115 int rc = 0, used_dma = 0, found = 0;
3117 /* step 1: calculate xfer_mask */
3118 ata_link_for_each_dev(dev, link) {
3119 unsigned long pio_mask, dma_mask;
3120 unsigned int mode_mask;
3122 if (!ata_dev_enabled(dev))
3125 mode_mask = ATA_DMA_MASK_ATA;
3126 if (dev->class == ATA_DEV_ATAPI)
3127 mode_mask = ATA_DMA_MASK_ATAPI;
3128 else if (ata_id_is_cfa(dev->id))
3129 mode_mask = ATA_DMA_MASK_CFA;
3131 ata_dev_xfermask(dev);
3133 pio_mask = ata_pack_xfermask(dev->pio_mask, 0, 0);
3134 dma_mask = ata_pack_xfermask(0, dev->mwdma_mask, dev->udma_mask);
3136 if (libata_dma_mask & mode_mask)
3137 dma_mask = ata_pack_xfermask(0, dev->mwdma_mask, dev->udma_mask);
3141 dev->pio_mode = ata_xfer_mask2mode(pio_mask);
3142 dev->dma_mode = ata_xfer_mask2mode(dma_mask);
3145 if (dev->dma_mode != 0xff)
3151 /* step 2: always set host PIO timings */
3152 ata_link_for_each_dev(dev, link) {
3153 if (!ata_dev_enabled(dev))
3156 if (dev->pio_mode == 0xff) {
3157 ata_dev_printk(dev, KERN_WARNING, "no PIO support\n");
3162 dev->xfer_mode = dev->pio_mode;
3163 dev->xfer_shift = ATA_SHIFT_PIO;
3164 if (ap->ops->set_piomode)
3165 ap->ops->set_piomode(ap, dev);
3168 /* step 3: set host DMA timings */
3169 ata_link_for_each_dev(dev, link) {
3170 if (!ata_dev_enabled(dev) || dev->dma_mode == 0xff)
3173 dev->xfer_mode = dev->dma_mode;
3174 dev->xfer_shift = ata_xfer_mode2shift(dev->dma_mode);
3175 if (ap->ops->set_dmamode)
3176 ap->ops->set_dmamode(ap, dev);
3179 /* step 4: update devices' xfer mode */
3180 ata_link_for_each_dev(dev, link) {
3181 /* don't update suspended devices' xfer mode */
3182 if (!ata_dev_enabled(dev))
3185 rc = ata_dev_set_mode(dev);
3190 /* Record simplex status. If we selected DMA then the other
3191 * host channels are not permitted to do so.
3193 if (used_dma && (ap->host->flags & ATA_HOST_SIMPLEX))
3194 ap->host->simplex_claimed = ap;
3198 *r_failed_dev = dev;
3203 * ata_tf_to_host - issue ATA taskfile to host controller
3204 * @ap: port to which command is being issued
3205 * @tf: ATA taskfile register set
3207 * Issues ATA taskfile register set to ATA host controller,
3208 * with proper synchronization with interrupt handler and
3212 * spin_lock_irqsave(host lock)
3215 static inline void ata_tf_to_host(struct ata_port *ap,
3216 const struct ata_taskfile *tf)
3218 ap->ops->tf_load(ap, tf);
3219 ap->ops->exec_command(ap, tf);
3223 * ata_busy_sleep - sleep until BSY clears, or timeout
3224 * @ap: port containing status register to be polled
3225 * @tmout_pat: impatience timeout
3226 * @tmout: overall timeout
3228 * Sleep until ATA Status register bit BSY clears,
3229 * or a timeout occurs.
3232 * Kernel thread context (may sleep).
3235 * 0 on success, -errno otherwise.
3237 int ata_busy_sleep(struct ata_port *ap,
3238 unsigned long tmout_pat, unsigned long tmout)
3240 unsigned long timer_start, timeout;
3243 status = ata_busy_wait(ap, ATA_BUSY, 300);
3244 timer_start = jiffies;
3245 timeout = timer_start + tmout_pat;
3246 while (status != 0xff && (status & ATA_BUSY) &&
3247 time_before(jiffies, timeout)) {
3249 status = ata_busy_wait(ap, ATA_BUSY, 3);
3252 if (status != 0xff && (status & ATA_BUSY))
3253 ata_port_printk(ap, KERN_WARNING,
3254 "port is slow to respond, please be patient "
3255 "(Status 0x%x)\n", status);
3257 timeout = timer_start + tmout;
3258 while (status != 0xff && (status & ATA_BUSY) &&
3259 time_before(jiffies, timeout)) {
3261 status = ata_chk_status(ap);
3267 if (status & ATA_BUSY) {
3268 ata_port_printk(ap, KERN_ERR, "port failed to respond "
3269 "(%lu secs, Status 0x%x)\n",
3270 tmout / HZ, status);
3278 * ata_wait_after_reset - wait before checking status after reset
3279 * @ap: port containing status register to be polled
3280 * @deadline: deadline jiffies for the operation
3282 * After reset, we need to pause a while before reading status.
3283 * Also, certain combination of controller and device report 0xff
3284 * for some duration (e.g. until SATA PHY is up and running)
3285 * which is interpreted as empty port in ATA world. This
3286 * function also waits for such devices to get out of 0xff
3290 * Kernel thread context (may sleep).
3292 void ata_wait_after_reset(struct ata_port *ap, unsigned long deadline)
3294 unsigned long until = jiffies + ATA_TMOUT_FF_WAIT;
3296 if (time_before(until, deadline))
3299 /* Spec mandates ">= 2ms" before checking status. We wait
3300 * 150ms, because that was the magic delay used for ATAPI
3301 * devices in Hale Landis's ATADRVR, for the period of time
3302 * between when the ATA command register is written, and then
3303 * status is checked. Because waiting for "a while" before
3304 * checking status is fine, post SRST, we perform this magic
3305 * delay here as well.
3307 * Old drivers/ide uses the 2mS rule and then waits for ready.
3311 /* Wait for 0xff to clear. Some SATA devices take a long time
3312 * to clear 0xff after reset. For example, HHD424020F7SV00
3313 * iVDR needs >= 800ms while. Quantum GoVault needs even more
3316 * Note that some PATA controllers (pata_ali) explode if
3317 * status register is read more than once when there's no
3320 if (ap->flags & ATA_FLAG_SATA) {
3322 u8 status = ata_chk_status(ap);
3324 if (status != 0xff || time_after(jiffies, deadline))
3333 * ata_wait_ready - sleep until BSY clears, or timeout
3334 * @ap: port containing status register to be polled
3335 * @deadline: deadline jiffies for the operation
3337 * Sleep until ATA Status register bit BSY clears, or timeout
3341 * Kernel thread context (may sleep).
3344 * 0 on success, -errno otherwise.
3346 int ata_wait_ready(struct ata_port *ap, unsigned long deadline)
3348 unsigned long start = jiffies;
3352 u8 status = ata_chk_status(ap);
3353 unsigned long now = jiffies;
3355 if (!(status & ATA_BUSY))
3357 if (!ata_link_online(&ap->link) && status == 0xff)
3359 if (time_after(now, deadline))
3362 if (!warned && time_after(now, start + 5 * HZ) &&
3363 (deadline - now > 3 * HZ)) {
3364 ata_port_printk(ap, KERN_WARNING,
3365 "port is slow to respond, please be patient "
3366 "(Status 0x%x)\n", status);
3374 static int ata_bus_post_reset(struct ata_port *ap, unsigned int devmask,
3375 unsigned long deadline)
3377 struct ata_ioports *ioaddr = &ap->ioaddr;
3378 unsigned int dev0 = devmask & (1 << 0);
3379 unsigned int dev1 = devmask & (1 << 1);
3382 /* if device 0 was found in ata_devchk, wait for its
3386 rc = ata_wait_ready(ap, deadline);
3394 /* if device 1 was found in ata_devchk, wait for register
3395 * access briefly, then wait for BSY to clear.
3400 ap->ops->dev_select(ap, 1);
3402 /* Wait for register access. Some ATAPI devices fail
3403 * to set nsect/lbal after reset, so don't waste too
3404 * much time on it. We're gonna wait for !BSY anyway.
3406 for (i = 0; i < 2; i++) {
3409 nsect = ioread8(ioaddr->nsect_addr);
3410 lbal = ioread8(ioaddr->lbal_addr);
3411 if ((nsect == 1) && (lbal == 1))
3413 msleep(50); /* give drive a breather */
3416 rc = ata_wait_ready(ap, deadline);
3424 /* is all this really necessary? */
3425 ap->ops->dev_select(ap, 0);
3427 ap->ops->dev_select(ap, 1);
3429 ap->ops->dev_select(ap, 0);
3434 static int ata_bus_softreset(struct ata_port *ap, unsigned int devmask,
3435 unsigned long deadline)
3437 struct ata_ioports *ioaddr = &ap->ioaddr;
3439 DPRINTK("ata%u: bus reset via SRST\n", ap->print_id);
3441 /* software reset. causes dev0 to be selected */
3442 iowrite8(ap->ctl, ioaddr->ctl_addr);
3443 udelay(20); /* FIXME: flush */
3444 iowrite8(ap->ctl | ATA_SRST, ioaddr->ctl_addr);
3445 udelay(20); /* FIXME: flush */
3446 iowrite8(ap->ctl, ioaddr->ctl_addr);
3448 /* wait a while before checking status */
3449 ata_wait_after_reset(ap, deadline);
3451 /* Before we perform post reset processing we want to see if
3452 * the bus shows 0xFF because the odd clown forgets the D7
3453 * pulldown resistor.
3455 if (ata_chk_status(ap) == 0xFF)
3458 return ata_bus_post_reset(ap, devmask, deadline);
3462 * ata_bus_reset - reset host port and associated ATA channel
3463 * @ap: port to reset
3465 * This is typically the first time we actually start issuing
3466 * commands to the ATA channel. We wait for BSY to clear, then
3467 * issue EXECUTE DEVICE DIAGNOSTIC command, polling for its
3468 * result. Determine what devices, if any, are on the channel
3469 * by looking at the device 0/1 error register. Look at the signature
3470 * stored in each device's taskfile registers, to determine if
3471 * the device is ATA or ATAPI.
3474 * PCI/etc. bus probe sem.
3475 * Obtains host lock.
3478 * Sets ATA_FLAG_DISABLED if bus reset fails.
3481 void ata_bus_reset(struct ata_port *ap)
3483 struct ata_device *device = ap->link.device;
3484 struct ata_ioports *ioaddr = &ap->ioaddr;
3485 unsigned int slave_possible = ap->flags & ATA_FLAG_SLAVE_POSS;
3487 unsigned int dev0, dev1 = 0, devmask = 0;
3490 DPRINTK("ENTER, host %u, port %u\n", ap->print_id, ap->port_no);
3492 /* determine if device 0/1 are present */
3493 if (ap->flags & ATA_FLAG_SATA_RESET)
3496 dev0 = ata_devchk(ap, 0);
3498 dev1 = ata_devchk(ap, 1);
3502 devmask |= (1 << 0);
3504 devmask |= (1 << 1);
3506 /* select device 0 again */
3507 ap->ops->dev_select(ap, 0);
3509 /* issue bus reset */
3510 if (ap->flags & ATA_FLAG_SRST) {
3511 rc = ata_bus_softreset(ap, devmask, jiffies + 40 * HZ);
3512 if (rc && rc != -ENODEV)
3517 * determine by signature whether we have ATA or ATAPI devices
3519 device[0].class = ata_dev_try_classify(&device[0], dev0, &err);
3520 if ((slave_possible) && (err != 0x81))
3521 device[1].class = ata_dev_try_classify(&device[1], dev1, &err);
3523 /* is double-select really necessary? */
3524 if (device[1].class != ATA_DEV_NONE)
3525 ap->ops->dev_select(ap, 1);
3526 if (device[0].class != ATA_DEV_NONE)
3527 ap->ops->dev_select(ap, 0);
3529 /* if no devices were detected, disable this port */
3530 if ((device[0].class == ATA_DEV_NONE) &&
3531 (device[1].class == ATA_DEV_NONE))
3534 if (ap->flags & (ATA_FLAG_SATA_RESET | ATA_FLAG_SRST)) {
3535 /* set up device control for ATA_FLAG_SATA_RESET */
3536 iowrite8(ap->ctl, ioaddr->ctl_addr);
3543 ata_port_printk(ap, KERN_ERR, "disabling port\n");
3544 ata_port_disable(ap);
3550 * sata_link_debounce - debounce SATA phy status
3551 * @link: ATA link to debounce SATA phy status for
3552 * @params: timing parameters { interval, duratinon, timeout } in msec
3553 * @deadline: deadline jiffies for the operation
3555 * Make sure SStatus of @link reaches stable state, determined by
3556 * holding the same value where DET is not 1 for @duration polled
3557 * every @interval, before @timeout. Timeout constraints the
3558 * beginning of the stable state. Because DET gets stuck at 1 on
3559 * some controllers after hot unplugging, this functions waits
3560 * until timeout then returns 0 if DET is stable at 1.
3562 * @timeout is further limited by @deadline. The sooner of the
3566 * Kernel thread context (may sleep)
3569 * 0 on success, -errno on failure.
3571 int sata_link_debounce(struct ata_link *link, const unsigned long *params,
3572 unsigned long deadline)
3574 unsigned long interval_msec = params[0];
3575 unsigned long duration = msecs_to_jiffies(params[1]);
3576 unsigned long last_jiffies, t;
3580 t = jiffies + msecs_to_jiffies(params[2]);
3581 if (time_before(t, deadline))
3584 if ((rc = sata_scr_read(link, SCR_STATUS, &cur)))
3589 last_jiffies = jiffies;
3592 msleep(interval_msec);
3593 if ((rc = sata_scr_read(link, SCR_STATUS, &cur)))
3599 if (cur == 1 && time_before(jiffies, deadline))
3601 if (time_after(jiffies, last_jiffies + duration))
3606 /* unstable, start over */
3608 last_jiffies = jiffies;
3610 /* Check deadline. If debouncing failed, return
3611 * -EPIPE to tell upper layer to lower link speed.
3613 if (time_after(jiffies, deadline))
3619 * sata_link_resume - resume SATA link
3620 * @link: ATA link to resume SATA
3621 * @params: timing parameters { interval, duratinon, timeout } in msec
3622 * @deadline: deadline jiffies for the operation
3624 * Resume SATA phy @link and debounce it.
3627 * Kernel thread context (may sleep)
3630 * 0 on success, -errno on failure.
3632 int sata_link_resume(struct ata_link *link, const unsigned long *params,
3633 unsigned long deadline)
3638 if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
3641 scontrol = (scontrol & 0x0f0) | 0x300;
3643 if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol)))
3646 /* Some PHYs react badly if SStatus is pounded immediately
3647 * after resuming. Delay 200ms before debouncing.
3651 return sata_link_debounce(link, params, deadline);
3655 * ata_std_prereset - prepare for reset
3656 * @link: ATA link to be reset
3657 * @deadline: deadline jiffies for the operation
3659 * @link is about to be reset. Initialize it. Failure from
3660 * prereset makes libata abort whole reset sequence and give up
3661 * that port, so prereset should be best-effort. It does its
3662 * best to prepare for reset sequence but if things go wrong, it
3663 * should just whine, not fail.
3666 * Kernel thread context (may sleep)
3669 * 0 on success, -errno otherwise.
3671 int ata_std_prereset(struct ata_link *link, unsigned long deadline)
3673 struct ata_port *ap = link->ap;
3674 struct ata_eh_context *ehc = &link->eh_context;
3675 const unsigned long *timing = sata_ehc_deb_timing(ehc);
3678 /* handle link resume */
3679 if ((ehc->i.flags & ATA_EHI_RESUME_LINK) &&
3680 (link->flags & ATA_LFLAG_HRST_TO_RESUME))
3681 ehc->i.action |= ATA_EH_HARDRESET;
3683 /* Some PMPs don't work with only SRST, force hardreset if PMP
3686 if (ap->flags & ATA_FLAG_PMP)
3687 ehc->i.action |= ATA_EH_HARDRESET;
3689 /* if we're about to do hardreset, nothing more to do */
3690 if (ehc->i.action & ATA_EH_HARDRESET)
3693 /* if SATA, resume link */
3694 if (ap->flags & ATA_FLAG_SATA) {
3695 rc = sata_link_resume(link, timing, deadline);
3696 /* whine about phy resume failure but proceed */
3697 if (rc && rc != -EOPNOTSUPP)
3698 ata_link_printk(link, KERN_WARNING, "failed to resume "
3699 "link for reset (errno=%d)\n", rc);
3702 /* Wait for !BSY if the controller can wait for the first D2H
3703 * Reg FIS and we don't know that no device is attached.
3705 if (!(link->flags & ATA_LFLAG_SKIP_D2H_BSY) && !ata_link_offline(link)) {
3706 rc = ata_wait_ready(ap, deadline);
3707 if (rc && rc != -ENODEV) {
3708 ata_link_printk(link, KERN_WARNING, "device not ready "
3709 "(errno=%d), forcing hardreset\n", rc);
3710 ehc->i.action |= ATA_EH_HARDRESET;
3718 * ata_std_softreset - reset host port via ATA SRST
3719 * @link: ATA link to reset
3720 * @classes: resulting classes of attached devices
3721 * @deadline: deadline jiffies for the operation
3723 * Reset host port using ATA SRST.
3726 * Kernel thread context (may sleep)
3729 * 0 on success, -errno otherwise.
3731 int ata_std_softreset(struct ata_link *link, unsigned int *classes,
3732 unsigned long deadline)
3734 struct ata_port *ap = link->ap;
3735 unsigned int slave_possible = ap->flags & ATA_FLAG_SLAVE_POSS;
3736 unsigned int devmask = 0;
3742 if (ata_link_offline(link)) {
3743 classes[0] = ATA_DEV_NONE;
3747 /* determine if device 0/1 are present */
3748 if (ata_devchk(ap, 0))
3749 devmask |= (1 << 0);
3750 if (slave_possible && ata_devchk(ap, 1))
3751 devmask |= (1 << 1);
3753 /* select device 0 again */
3754 ap->ops->dev_select(ap, 0);
3756 /* issue bus reset */
3757 DPRINTK("about to softreset, devmask=%x\n", devmask);
3758 rc = ata_bus_softreset(ap, devmask, deadline);
3759 /* if link is occupied, -ENODEV too is an error */
3760 if (rc && (rc != -ENODEV || sata_scr_valid(link))) {
3761 ata_link_printk(link, KERN_ERR, "SRST failed (errno=%d)\n", rc);
3765 /* determine by signature whether we have ATA or ATAPI devices */
3766 classes[0] = ata_dev_try_classify(&link->device[0],
3767 devmask & (1 << 0), &err);
3768 if (slave_possible && err != 0x81)
3769 classes[1] = ata_dev_try_classify(&link->device[1],
3770 devmask & (1 << 1), &err);
3773 DPRINTK("EXIT, classes[0]=%u [1]=%u\n", classes[0], classes[1]);
3778 * sata_link_hardreset - reset link via SATA phy reset
3779 * @link: link to reset
3780 * @timing: timing parameters { interval, duratinon, timeout } in msec
3781 * @deadline: deadline jiffies for the operation
3783 * SATA phy-reset @link using DET bits of SControl register.
3786 * Kernel thread context (may sleep)
3789 * 0 on success, -errno otherwise.
3791 int sata_link_hardreset(struct ata_link *link, const unsigned long *timing,
3792 unsigned long deadline)
3799 if (sata_set_spd_needed(link)) {
3800 /* SATA spec says nothing about how to reconfigure
3801 * spd. To be on the safe side, turn off phy during
3802 * reconfiguration. This works for at least ICH7 AHCI
3805 if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
3808 scontrol = (scontrol & 0x0f0) | 0x304;
3810 if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol)))
3816 /* issue phy wake/reset */
3817 if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
3820 scontrol = (scontrol & 0x0f0) | 0x301;
3822 if ((rc = sata_scr_write_flush(link, SCR_CONTROL, scontrol)))
3825 /* Couldn't find anything in SATA I/II specs, but AHCI-1.1
3826 * 10.4.2 says at least 1 ms.
3830 /* bring link back */
3831 rc = sata_link_resume(link, timing, deadline);
3833 DPRINTK("EXIT, rc=%d\n", rc);
3838 * sata_std_hardreset - reset host port via SATA phy reset
3839 * @link: link to reset
3840 * @class: resulting class of attached device
3841 * @deadline: deadline jiffies for the operation
3843 * SATA phy-reset host port using DET bits of SControl register,
3844 * wait for !BSY and classify the attached device.
3847 * Kernel thread context (may sleep)
3850 * 0 on success, -errno otherwise.
3852 int sata_std_hardreset(struct ata_link *link, unsigned int *class,
3853 unsigned long deadline)
3855 struct ata_port *ap = link->ap;
3856 const unsigned long *timing = sata_ehc_deb_timing(&link->eh_context);
3862 rc = sata_link_hardreset(link, timing, deadline);
3864 ata_link_printk(link, KERN_ERR,
3865 "COMRESET failed (errno=%d)\n", rc);
3869 /* TODO: phy layer with polling, timeouts, etc. */
3870 if (ata_link_offline(link)) {
3871 *class = ATA_DEV_NONE;
3872 DPRINTK("EXIT, link offline\n");
3876 /* wait a while before checking status */
3877 ata_wait_after_reset(ap, deadline);
3879 /* If PMP is supported, we have to do follow-up SRST. Note
3880 * that some PMPs don't send D2H Reg FIS after hardreset at
3881 * all if the first port is empty. Wait for it just for a
3882 * second and request follow-up SRST.
3884 if (ap->flags & ATA_FLAG_PMP) {
3885 ata_wait_ready(ap, jiffies + HZ);
3889 rc = ata_wait_ready(ap, deadline);
3890 /* link occupied, -ENODEV too is an error */
3892 ata_link_printk(link, KERN_ERR,
3893 "COMRESET failed (errno=%d)\n", rc);
3897 ap->ops->dev_select(ap, 0); /* probably unnecessary */
3899 *class = ata_dev_try_classify(link->device, 1, NULL);
3901 DPRINTK("EXIT, class=%u\n", *class);
3906 * ata_std_postreset - standard postreset callback
3907 * @link: the target ata_link
3908 * @classes: classes of attached devices
3910 * This function is invoked after a successful reset. Note that
3911 * the device might have been reset more than once using
3912 * different reset methods before postreset is invoked.
3915 * Kernel thread context (may sleep)
3917 void ata_std_postreset(struct ata_link *link, unsigned int *classes)
3919 struct ata_port *ap = link->ap;
3924 /* print link status */
3925 sata_print_link_status(link);
3928 if (sata_scr_read(link, SCR_ERROR, &serror) == 0)
3929 sata_scr_write(link, SCR_ERROR, serror);
3930 link->eh_info.serror = 0;
3932 /* is double-select really necessary? */
3933 if (classes[0] != ATA_DEV_NONE)
3934 ap->ops->dev_select(ap, 1);
3935 if (classes[1] != ATA_DEV_NONE)
3936 ap->ops->dev_select(ap, 0);
3938 /* bail out if no device is present */
3939 if (classes[0] == ATA_DEV_NONE && classes[1] == ATA_DEV_NONE) {
3940 DPRINTK("EXIT, no device\n");
3944 /* set up device control */
3945 if (ap->ioaddr.ctl_addr)
3946 iowrite8(ap->ctl, ap->ioaddr.ctl_addr);
3952 * ata_dev_same_device - Determine whether new ID matches configured device
3953 * @dev: device to compare against
3954 * @new_class: class of the new device
3955 * @new_id: IDENTIFY page of the new device
3957 * Compare @new_class and @new_id against @dev and determine
3958 * whether @dev is the device indicated by @new_class and
3965 * 1 if @dev matches @new_class and @new_id, 0 otherwise.
3967 static int ata_dev_same_device(struct ata_device *dev, unsigned int new_class,
3970 const u16 *old_id = dev->id;
3971 unsigned char model[2][ATA_ID_PROD_LEN + 1];
3972 unsigned char serial[2][ATA_ID_SERNO_LEN + 1];
3974 if (dev->class != new_class) {
3975 ata_dev_printk(dev, KERN_INFO, "class mismatch %d != %d\n",
3976 dev->class, new_class);
3980 ata_id_c_string(old_id, model[0], ATA_ID_PROD, sizeof(model[0]));
3981 ata_id_c_string(new_id, model[1], ATA_ID_PROD, sizeof(model[1]));
3982 ata_id_c_string(old_id, serial[0], ATA_ID_SERNO, sizeof(serial[0]));
3983 ata_id_c_string(new_id, serial[1], ATA_ID_SERNO, sizeof(serial[1]));
3985 if (strcmp(model[0], model[1])) {
3986 ata_dev_printk(dev, KERN_INFO, "model number mismatch "
3987 "'%s' != '%s'\n", model[0], model[1]);
3991 if (strcmp(serial[0], serial[1])) {
3992 ata_dev_printk(dev, KERN_INFO, "serial number mismatch "
3993 "'%s' != '%s'\n", serial[0], serial[1]);
4001 * ata_dev_reread_id - Re-read IDENTIFY data
4002 * @dev: target ATA device
4003 * @readid_flags: read ID flags
4005 * Re-read IDENTIFY page and make sure @dev is still attached to
4009 * Kernel thread context (may sleep)
4012 * 0 on success, negative errno otherwise
4014 int ata_dev_reread_id(struct ata_device *dev, unsigned int readid_flags)
4016 unsigned int class = dev->class;
4017 u16 *id = (void *)dev->link->ap->sector_buf;
4021 rc = ata_dev_read_id(dev, &class, readid_flags, id);
4025 /* is the device still there? */
4026 if (!ata_dev_same_device(dev, class, id))
4029 memcpy(dev->id, id, sizeof(id[0]) * ATA_ID_WORDS);
4034 * ata_dev_revalidate - Revalidate ATA device
4035 * @dev: device to revalidate
4036 * @new_class: new class code
4037 * @readid_flags: read ID flags
4039 * Re-read IDENTIFY page, make sure @dev is still attached to the
4040 * port and reconfigure it according to the new IDENTIFY page.
4043 * Kernel thread context (may sleep)
4046 * 0 on success, negative errno otherwise
4048 int ata_dev_revalidate(struct ata_device *dev, unsigned int new_class,
4049 unsigned int readid_flags)
4051 u64 n_sectors = dev->n_sectors;
4054 if (!ata_dev_enabled(dev))
4057 /* fail early if !ATA && !ATAPI to avoid issuing [P]IDENTIFY to PMP */
4058 if (ata_class_enabled(new_class) &&
4059 new_class != ATA_DEV_ATA && new_class != ATA_DEV_ATAPI) {
4060 ata_dev_printk(dev, KERN_INFO, "class mismatch %u != %u\n",
4061 dev->class, new_class);
4067 rc = ata_dev_reread_id(dev, readid_flags);
4071 /* configure device according to the new ID */
4072 rc = ata_dev_configure(dev);
4076 /* verify n_sectors hasn't changed */
4077 if (dev->class == ATA_DEV_ATA && n_sectors &&
4078 dev->n_sectors != n_sectors) {
4079 ata_dev_printk(dev, KERN_INFO, "n_sectors mismatch "
4081 (unsigned long long)n_sectors,
4082 (unsigned long long)dev->n_sectors);
4084 /* restore original n_sectors */
4085 dev->n_sectors = n_sectors;
4094 ata_dev_printk(dev, KERN_ERR, "revalidation failed (errno=%d)\n", rc);
4098 struct ata_blacklist_entry {
4099 const char *model_num;
4100 const char *model_rev;
4101 unsigned long horkage;
4104 static const struct ata_blacklist_entry ata_device_blacklist [] = {
4105 /* Devices with DMA related problems under Linux */
4106 { "WDC AC11000H", NULL, ATA_HORKAGE_NODMA },
4107 { "WDC AC22100H", NULL, ATA_HORKAGE_NODMA },
4108 { "WDC AC32500H", NULL, ATA_HORKAGE_NODMA },
4109 { "WDC AC33100H", NULL, ATA_HORKAGE_NODMA },
4110 { "WDC AC31600H", NULL, ATA_HORKAGE_NODMA },
4111 { "WDC AC32100H", "24.09P07", ATA_HORKAGE_NODMA },
4112 { "WDC AC23200L", "21.10N21", ATA_HORKAGE_NODMA },
4113 { "Compaq CRD-8241B", NULL, ATA_HORKAGE_NODMA },
4114 { "CRD-8400B", NULL, ATA_HORKAGE_NODMA },
4115 { "CRD-8480B", NULL, ATA_HORKAGE_NODMA },
4116 { "CRD-8482B", NULL, ATA_HORKAGE_NODMA },
4117 { "CRD-84", NULL, ATA_HORKAGE_NODMA },
4118 { "SanDisk SDP3B", NULL, ATA_HORKAGE_NODMA },
4119 { "SanDisk SDP3B-64", NULL, ATA_HORKAGE_NODMA },
4120 { "SANYO CD-ROM CRD", NULL, ATA_HORKAGE_NODMA },
4121 { "HITACHI CDR-8", NULL, ATA_HORKAGE_NODMA },
4122 { "HITACHI CDR-8335", NULL, ATA_HORKAGE_NODMA },
4123 { "HITACHI CDR-8435", NULL, ATA_HORKAGE_NODMA },
4124 { "Toshiba CD-ROM XM-6202B", NULL, ATA_HORKAGE_NODMA },
4125 { "TOSHIBA CD-ROM XM-1702BC", NULL, ATA_HORKAGE_NODMA },
4126 { "CD-532E-A", NULL, ATA_HORKAGE_NODMA },
4127 { "E-IDE CD-ROM CR-840",NULL, ATA_HORKAGE_NODMA },
4128 { "CD-ROM Drive/F5A", NULL, ATA_HORKAGE_NODMA },
4129 { "WPI CDD-820", NULL, ATA_HORKAGE_NODMA },
4130 { "SAMSUNG CD-ROM SC-148C", NULL, ATA_HORKAGE_NODMA },
4131 { "SAMSUNG CD-ROM SC", NULL, ATA_HORKAGE_NODMA },
4132 { "ATAPI CD-ROM DRIVE 40X MAXIMUM",NULL,ATA_HORKAGE_NODMA },
4133 { "_NEC DV5800A", NULL, ATA_HORKAGE_NODMA },
4134 { "SAMSUNG CD-ROM SN-124", "N001", ATA_HORKAGE_NODMA },
4135 { "Seagate STT20000A", NULL, ATA_HORKAGE_NODMA },
4136 /* Odd clown on sil3726/4726 PMPs */
4137 { "Config Disk", NULL, ATA_HORKAGE_NODMA |
4138 ATA_HORKAGE_SKIP_PM },
4140 /* Weird ATAPI devices */
4141 { "TORiSAN DVD-ROM DRD-N216", NULL, ATA_HORKAGE_MAX_SEC_128 },
4143 /* Devices we expect to fail diagnostics */
4145 /* Devices where NCQ should be avoided */
4147 { "WDC WD740ADFD-00", NULL, ATA_HORKAGE_NONCQ },
4148 { "WDC WD740ADFD-00NLR1", NULL, ATA_HORKAGE_NONCQ, },
4149 /* http://thread.gmane.org/gmane.linux.ide/14907 */
4150 { "FUJITSU MHT2060BH", NULL, ATA_HORKAGE_NONCQ },
4152 { "Maxtor *", "BANC*", ATA_HORKAGE_NONCQ },
4153 { "Maxtor 7V300F0", "VA111630", ATA_HORKAGE_NONCQ },
4154 { "HITACHI HDS7250SASUN500G*", NULL, ATA_HORKAGE_NONCQ },
4155 { "HITACHI HDS7225SBSUN250G*", NULL, ATA_HORKAGE_NONCQ },
4156 { "ST380817AS", "3.42", ATA_HORKAGE_NONCQ },
4157 { "ST3160023AS", "3.42", ATA_HORKAGE_NONCQ },
4159 /* Blacklist entries taken from Silicon Image 3124/3132
4160 Windows driver .inf file - also several Linux problem reports */
4161 { "HTS541060G9SA00", "MB3OC60D", ATA_HORKAGE_NONCQ, },
4162 { "HTS541080G9SA00", "MB4OC60D", ATA_HORKAGE_NONCQ, },
4163 { "HTS541010G9SA00", "MBZOC60D", ATA_HORKAGE_NONCQ, },
4165 /* devices which puke on READ_NATIVE_MAX */
4166 { "HDS724040KLSA80", "KFAOA20N", ATA_HORKAGE_BROKEN_HPA, },
4167 { "WDC WD3200JD-00KLB0", "WD-WCAMR1130137", ATA_HORKAGE_BROKEN_HPA },
4168 { "WDC WD2500JD-00HBB0", "WD-WMAL71490727", ATA_HORKAGE_BROKEN_HPA },
4169 { "MAXTOR 6L080L4", "A93.0500", ATA_HORKAGE_BROKEN_HPA },
4171 /* Devices which report 1 sector over size HPA */
4172 { "ST340823A", NULL, ATA_HORKAGE_HPA_SIZE, },
4173 { "ST320413A", NULL, ATA_HORKAGE_HPA_SIZE, },
4175 /* Devices which get the IVB wrong */
4176 { "QUANTUM FIREBALLlct10 05", "A03.0900", ATA_HORKAGE_IVB, },
4177 { "TSSTcorp CDDVDW SH-S202J", "SB00", ATA_HORKAGE_IVB, },
4178 { "TSSTcorp CDDVDW SH-S202J", "SB01", ATA_HORKAGE_IVB, },
4179 { "TSSTcorp CDDVDW SH-S202N", "SB00", ATA_HORKAGE_IVB, },
4180 { "TSSTcorp CDDVDW SH-S202N", "SB01", ATA_HORKAGE_IVB, },
4186 static int strn_pattern_cmp(const char *patt, const char *name, int wildchar)
4192 * check for trailing wildcard: *\0
4194 p = strchr(patt, wildchar);
4195 if (p && ((*(p + 1)) == 0))
4206 return strncmp(patt, name, len);
4209 static unsigned long ata_dev_blacklisted(const struct ata_device *dev)
4211 unsigned char model_num[ATA_ID_PROD_LEN + 1];
4212 unsigned char model_rev[ATA_ID_FW_REV_LEN + 1];
4213 const struct ata_blacklist_entry *ad = ata_device_blacklist;
4215 ata_id_c_string(dev->id, model_num, ATA_ID_PROD, sizeof(model_num));
4216 ata_id_c_string(dev->id, model_rev, ATA_ID_FW_REV, sizeof(model_rev));
4218 while (ad->model_num) {
4219 if (!strn_pattern_cmp(ad->model_num, model_num, '*')) {
4220 if (ad->model_rev == NULL)
4222 if (!strn_pattern_cmp(ad->model_rev, model_rev, '*'))
4230 static int ata_dma_blacklisted(const struct ata_device *dev)
4232 /* We don't support polling DMA.
4233 * DMA blacklist those ATAPI devices with CDB-intr (and use PIO)
4234 * if the LLDD handles only interrupts in the HSM_ST_LAST state.
4236 if ((dev->link->ap->flags & ATA_FLAG_PIO_POLLING) &&
4237 (dev->flags & ATA_DFLAG_CDB_INTR))
4239 return (dev->horkage & ATA_HORKAGE_NODMA) ? 1 : 0;
4243 * ata_is_40wire - check drive side detection
4246 * Perform drive side detection decoding, allowing for device vendors
4247 * who can't follow the documentation.
4250 static int ata_is_40wire(struct ata_device *dev)
4252 if (dev->horkage & ATA_HORKAGE_IVB)
4253 return ata_drive_40wire_relaxed(dev->id);
4254 return ata_drive_40wire(dev->id);
4258 * ata_dev_xfermask - Compute supported xfermask of the given device
4259 * @dev: Device to compute xfermask for
4261 * Compute supported xfermask of @dev and store it in
4262 * dev->*_mask. This function is responsible for applying all
4263 * known limits including host controller limits, device
4269 static void ata_dev_xfermask(struct ata_device *dev)
4271 struct ata_link *link = dev->link;
4272 struct ata_port *ap = link->ap;
4273 struct ata_host *host = ap->host;
4274 unsigned long xfer_mask;
4276 /* controller modes available */
4277 xfer_mask = ata_pack_xfermask(ap->pio_mask,
4278 ap->mwdma_mask, ap->udma_mask);
4280 /* drive modes available */
4281 xfer_mask &= ata_pack_xfermask(dev->pio_mask,
4282 dev->mwdma_mask, dev->udma_mask);
4283 xfer_mask &= ata_id_xfermask(dev->id);
4286 * CFA Advanced TrueIDE timings are not allowed on a shared
4289 if (ata_dev_pair(dev)) {
4290 /* No PIO5 or PIO6 */
4291 xfer_mask &= ~(0x03 << (ATA_SHIFT_PIO + 5));
4292 /* No MWDMA3 or MWDMA 4 */
4293 xfer_mask &= ~(0x03 << (ATA_SHIFT_MWDMA + 3));
4296 if (ata_dma_blacklisted(dev)) {
4297 xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA);
4298 ata_dev_printk(dev, KERN_WARNING,
4299 "device is on DMA blacklist, disabling DMA\n");
4302 if ((host->flags & ATA_HOST_SIMPLEX) &&
4303 host->simplex_claimed && host->simplex_claimed != ap) {
4304 xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA);
4305 ata_dev_printk(dev, KERN_WARNING, "simplex DMA is claimed by "
4306 "other device, disabling DMA\n");
4309 if (ap->flags & ATA_FLAG_NO_IORDY)
4310 xfer_mask &= ata_pio_mask_no_iordy(dev);
4312 if (ap->ops->mode_filter)
4313 xfer_mask = ap->ops->mode_filter(dev, xfer_mask);
4315 /* Apply cable rule here. Don't apply it early because when
4316 * we handle hot plug the cable type can itself change.
4317 * Check this last so that we know if the transfer rate was
4318 * solely limited by the cable.
4319 * Unknown or 80 wire cables reported host side are checked
4320 * drive side as well. Cases where we know a 40wire cable
4321 * is used safely for 80 are not checked here.
4323 if (xfer_mask & (0xF8 << ATA_SHIFT_UDMA))
4324 /* UDMA/44 or higher would be available */
4325 if ((ap->cbl == ATA_CBL_PATA40) ||
4326 (ata_is_40wire(dev) &&
4327 (ap->cbl == ATA_CBL_PATA_UNK ||
4328 ap->cbl == ATA_CBL_PATA80))) {
4329 ata_dev_printk(dev, KERN_WARNING,
4330 "limited to UDMA/33 due to 40-wire cable\n");
4331 xfer_mask &= ~(0xF8 << ATA_SHIFT_UDMA);
4334 ata_unpack_xfermask(xfer_mask, &dev->pio_mask,
4335 &dev->mwdma_mask, &dev->udma_mask);
4339 * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command
4340 * @dev: Device to which command will be sent
4342 * Issue SET FEATURES - XFER MODE command to device @dev
4346 * PCI/etc. bus probe sem.
4349 * 0 on success, AC_ERR_* mask otherwise.
4352 static unsigned int ata_dev_set_xfermode(struct ata_device *dev)
4354 struct ata_taskfile tf;
4355 unsigned int err_mask;
4357 /* set up set-features taskfile */
4358 DPRINTK("set features - xfer mode\n");
4360 /* Some controllers and ATAPI devices show flaky interrupt
4361 * behavior after setting xfer mode. Use polling instead.
4363 ata_tf_init(dev, &tf);
4364 tf.command = ATA_CMD_SET_FEATURES;
4365 tf.feature = SETFEATURES_XFER;
4366 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_POLLING;
4367 tf.protocol = ATA_PROT_NODATA;
4368 /* If we are using IORDY we must send the mode setting command */
4369 if (ata_pio_need_iordy(dev))
4370 tf.nsect = dev->xfer_mode;
4371 /* If the device has IORDY and the controller does not - turn it off */
4372 else if (ata_id_has_iordy(dev->id))
4374 else /* In the ancient relic department - skip all of this */
4377 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
4379 DPRINTK("EXIT, err_mask=%x\n", err_mask);
4383 * ata_dev_set_feature - Issue SET FEATURES - SATA FEATURES
4384 * @dev: Device to which command will be sent
4385 * @enable: Whether to enable or disable the feature
4386 * @feature: The sector count represents the feature to set
4388 * Issue SET FEATURES - SATA FEATURES command to device @dev
4389 * on port @ap with sector count
4392 * PCI/etc. bus probe sem.
4395 * 0 on success, AC_ERR_* mask otherwise.
4397 static unsigned int ata_dev_set_feature(struct ata_device *dev, u8 enable,
4400 struct ata_taskfile tf;
4401 unsigned int err_mask;
4403 /* set up set-features taskfile */
4404 DPRINTK("set features - SATA features\n");
4406 ata_tf_init(dev, &tf);
4407 tf.command = ATA_CMD_SET_FEATURES;
4408 tf.feature = enable;
4409 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
4410 tf.protocol = ATA_PROT_NODATA;
4413 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
4415 DPRINTK("EXIT, err_mask=%x\n", err_mask);
4420 * ata_dev_init_params - Issue INIT DEV PARAMS command
4421 * @dev: Device to which command will be sent
4422 * @heads: Number of heads (taskfile parameter)
4423 * @sectors: Number of sectors (taskfile parameter)
4426 * Kernel thread context (may sleep)
4429 * 0 on success, AC_ERR_* mask otherwise.
4431 static unsigned int ata_dev_init_params(struct ata_device *dev,
4432 u16 heads, u16 sectors)
4434 struct ata_taskfile tf;
4435 unsigned int err_mask;
4437 /* Number of sectors per track 1-255. Number of heads 1-16 */
4438 if (sectors < 1 || sectors > 255 || heads < 1 || heads > 16)
4439 return AC_ERR_INVALID;
4441 /* set up init dev params taskfile */
4442 DPRINTK("init dev params \n");
4444 ata_tf_init(dev, &tf);
4445 tf.command = ATA_CMD_INIT_DEV_PARAMS;
4446 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
4447 tf.protocol = ATA_PROT_NODATA;
4449 tf.device |= (heads - 1) & 0x0f; /* max head = num. of heads - 1 */
4451 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
4452 /* A clean abort indicates an original or just out of spec drive
4453 and we should continue as we issue the setup based on the
4454 drive reported working geometry */
4455 if (err_mask == AC_ERR_DEV && (tf.feature & ATA_ABORTED))
4458 DPRINTK("EXIT, err_mask=%x\n", err_mask);
4463 * ata_sg_clean - Unmap DMA memory associated with command
4464 * @qc: Command containing DMA memory to be released
4466 * Unmap all mapped DMA memory associated with this command.
4469 * spin_lock_irqsave(host lock)
4471 void ata_sg_clean(struct ata_queued_cmd *qc)
4473 struct ata_port *ap = qc->ap;
4474 struct scatterlist *sg = qc->sg;
4475 int dir = qc->dma_dir;
4476 void *pad_buf = NULL;
4478 WARN_ON(sg == NULL);
4480 VPRINTK("unmapping %u sg elements\n", qc->mapped_n_elem);
4482 /* if we padded the buffer out to 32-bit bound, and data
4483 * xfer direction is from-device, we must copy from the
4484 * pad buffer back into the supplied buffer
4486 if (qc->pad_len && !(qc->tf.flags & ATA_TFLAG_WRITE))
4487 pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ);
4489 if (qc->mapped_n_elem)
4490 dma_unmap_sg(ap->dev, sg, qc->mapped_n_elem, dir);
4491 /* restore last sg */
4493 *qc->last_sg = qc->saved_last_sg;
4495 struct scatterlist *psg = &qc->extra_sg[1];
4496 void *addr = kmap_atomic(sg_page(psg), KM_IRQ0);
4497 memcpy(addr + psg->offset, pad_buf, qc->pad_len);
4498 kunmap_atomic(addr, KM_IRQ0);
4501 qc->flags &= ~ATA_QCFLAG_DMAMAP;
4506 * ata_fill_sg - Fill PCI IDE PRD table
4507 * @qc: Metadata associated with taskfile to be transferred
4509 * Fill PCI IDE PRD (scatter-gather) table with segments
4510 * associated with the current disk command.
4513 * spin_lock_irqsave(host lock)
4516 static void ata_fill_sg(struct ata_queued_cmd *qc)
4518 struct ata_port *ap = qc->ap;
4519 struct scatterlist *sg;
4520 unsigned int si, pi;
4523 for_each_sg(qc->sg, sg, qc->n_elem, si) {
4527 /* determine if physical DMA addr spans 64K boundary.
4528 * Note h/w doesn't support 64-bit, so we unconditionally
4529 * truncate dma_addr_t to u32.
4531 addr = (u32) sg_dma_address(sg);
4532 sg_len = sg_dma_len(sg);
4535 offset = addr & 0xffff;
4537 if ((offset + sg_len) > 0x10000)
4538 len = 0x10000 - offset;
4540 ap->prd[pi].addr = cpu_to_le32(addr);
4541 ap->prd[pi].flags_len = cpu_to_le32(len & 0xffff);
4542 VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", pi, addr, len);
4550 ap->prd[pi - 1].flags_len |= cpu_to_le32(ATA_PRD_EOT);
4554 * ata_fill_sg_dumb - Fill PCI IDE PRD table
4555 * @qc: Metadata associated with taskfile to be transferred
4557 * Fill PCI IDE PRD (scatter-gather) table with segments
4558 * associated with the current disk command. Perform the fill
4559 * so that we avoid writing any length 64K records for
4560 * controllers that don't follow the spec.
4563 * spin_lock_irqsave(host lock)
4566 static void ata_fill_sg_dumb(struct ata_queued_cmd *qc)
4568 struct ata_port *ap = qc->ap;
4569 struct scatterlist *sg;
4570 unsigned int si, pi;
4573 for_each_sg(qc->sg, sg, qc->n_elem, si) {
4575 u32 sg_len, len, blen;
4577 /* determine if physical DMA addr spans 64K boundary.
4578 * Note h/w doesn't support 64-bit, so we unconditionally
4579 * truncate dma_addr_t to u32.
4581 addr = (u32) sg_dma_address(sg);
4582 sg_len = sg_dma_len(sg);
4585 offset = addr & 0xffff;
4587 if ((offset + sg_len) > 0x10000)
4588 len = 0x10000 - offset;
4590 blen = len & 0xffff;
4591 ap->prd[pi].addr = cpu_to_le32(addr);
4593 /* Some PATA chipsets like the CS5530 can't
4594 cope with 0x0000 meaning 64K as the spec says */
4595 ap->prd[pi].flags_len = cpu_to_le32(0x8000);
4597 ap->prd[++pi].addr = cpu_to_le32(addr + 0x8000);
4599 ap->prd[pi].flags_len = cpu_to_le32(blen);
4600 VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", pi, addr, len);
4608 ap->prd[pi - 1].flags_len |= cpu_to_le32(ATA_PRD_EOT);
4612 * ata_check_atapi_dma - Check whether ATAPI DMA can be supported
4613 * @qc: Metadata associated with taskfile to check
4615 * Allow low-level driver to filter ATA PACKET commands, returning
4616 * a status indicating whether or not it is OK to use DMA for the
4617 * supplied PACKET command.
4620 * spin_lock_irqsave(host lock)
4622 * RETURNS: 0 when ATAPI DMA can be used
4625 int ata_check_atapi_dma(struct ata_queued_cmd *qc)
4627 struct ata_port *ap = qc->ap;
4629 /* Don't allow DMA if it isn't multiple of 16 bytes. Quite a
4630 * few ATAPI devices choke on such DMA requests.
4632 if (unlikely(qc->nbytes & 15))
4635 if (ap->ops->check_atapi_dma)
4636 return ap->ops->check_atapi_dma(qc);
4642 * atapi_qc_may_overflow - Check whether data transfer may overflow
4643 * @qc: ATA command in question
4645 * ATAPI commands which transfer variable length data to host
4646 * might overflow due to application error or hardare bug. This
4647 * function checks whether overflow should be drained and ignored
4654 * 1 if @qc may overflow; otherwise, 0.
4656 static int atapi_qc_may_overflow(struct ata_queued_cmd *qc)
4658 if (qc->tf.protocol != ATAPI_PROT_PIO &&
4659 qc->tf.protocol != ATAPI_PROT_DMA)
4662 if (qc->tf.flags & ATA_TFLAG_WRITE)
4665 switch (qc->cdb[0]) {
4671 case GPCMD_READ_CD_MSF:
4679 * ata_std_qc_defer - Check whether a qc needs to be deferred
4680 * @qc: ATA command in question
4682 * Non-NCQ commands cannot run with any other command, NCQ or
4683 * not. As upper layer only knows the queue depth, we are
4684 * responsible for maintaining exclusion. This function checks
4685 * whether a new command @qc can be issued.
4688 * spin_lock_irqsave(host lock)
4691 * ATA_DEFER_* if deferring is needed, 0 otherwise.
4693 int ata_std_qc_defer(struct ata_queued_cmd *qc)
4695 struct ata_link *link = qc->dev->link;
4697 if (qc->tf.protocol == ATA_PROT_NCQ) {
4698 if (!ata_tag_valid(link->active_tag))
4701 if (!ata_tag_valid(link->active_tag) && !link->sactive)
4705 return ATA_DEFER_LINK;
4709 * ata_qc_prep - Prepare taskfile for submission
4710 * @qc: Metadata associated with taskfile to be prepared
4712 * Prepare ATA taskfile for submission.
4715 * spin_lock_irqsave(host lock)
4717 void ata_qc_prep(struct ata_queued_cmd *qc)
4719 if (!(qc->flags & ATA_QCFLAG_DMAMAP))
4726 * ata_dumb_qc_prep - Prepare taskfile for submission
4727 * @qc: Metadata associated with taskfile to be prepared
4729 * Prepare ATA taskfile for submission.
4732 * spin_lock_irqsave(host lock)
4734 void ata_dumb_qc_prep(struct ata_queued_cmd *qc)
4736 if (!(qc->flags & ATA_QCFLAG_DMAMAP))
4739 ata_fill_sg_dumb(qc);
4742 void ata_noop_qc_prep(struct ata_queued_cmd *qc) { }
4745 * ata_sg_init - Associate command with scatter-gather table.
4746 * @qc: Command to be associated
4747 * @sg: Scatter-gather table.
4748 * @n_elem: Number of elements in s/g table.
4750 * Initialize the data-related elements of queued_cmd @qc
4751 * to point to a scatter-gather table @sg, containing @n_elem
4755 * spin_lock_irqsave(host lock)
4757 void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
4758 unsigned int n_elem)
4761 qc->n_elem = n_elem;
4765 static unsigned int ata_sg_setup_extra(struct ata_queued_cmd *qc,
4766 unsigned int *n_elem_extra,
4767 unsigned int *nbytes_extra)
4769 struct ata_port *ap = qc->ap;
4770 unsigned int n_elem = qc->n_elem;
4771 struct scatterlist *lsg, *copy_lsg = NULL, *tsg = NULL, *esg = NULL;
4776 /* needs padding? */
4777 qc->pad_len = qc->nbytes & 3;
4779 if (likely(!qc->pad_len))
4782 /* locate last sg and save it */
4783 lsg = sg_last(qc->sg, n_elem);
4785 qc->saved_last_sg = *lsg;
4787 sg_init_table(qc->extra_sg, ARRAY_SIZE(qc->extra_sg));
4790 struct scatterlist *psg = &qc->extra_sg[1];
4791 void *pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ);
4792 unsigned int offset;
4794 WARN_ON(qc->dev->class != ATA_DEV_ATAPI);
4796 memset(pad_buf, 0, ATA_DMA_PAD_SZ);
4798 /* psg->page/offset are used to copy to-be-written
4799 * data in this function or read data in ata_sg_clean.
4801 offset = lsg->offset + lsg->length - qc->pad_len;
4802 sg_set_page(psg, nth_page(sg_page(lsg), offset >> PAGE_SHIFT),
4803 qc->pad_len, offset_in_page(offset));
4805 if (qc->tf.flags & ATA_TFLAG_WRITE) {
4806 void *addr = kmap_atomic(sg_page(psg), KM_IRQ0);
4807 memcpy(pad_buf, addr + psg->offset, qc->pad_len);
4808 kunmap_atomic(addr, KM_IRQ0);
4811 sg_dma_address(psg) = ap->pad_dma + (qc->tag * ATA_DMA_PAD_SZ);
4812 sg_dma_len(psg) = ATA_DMA_PAD_SZ;
4814 /* Trim the last sg entry and chain the original and
4817 * Because chaining consumes one sg entry, one extra
4818 * sg entry is allocated and the last sg entry is
4819 * copied to it if the length isn't zero after padded
4820 * amount is removed.
4822 * If the last sg entry is completely replaced by
4823 * padding sg entry, the first sg entry is skipped
4826 lsg->length -= qc->pad_len;
4828 copy_lsg = &qc->extra_sg[0];
4829 tsg = &qc->extra_sg[0];
4832 tsg = &qc->extra_sg[1];
4835 esg = &qc->extra_sg[1];
4838 (*nbytes_extra) += 4 - qc->pad_len;
4842 sg_set_page(copy_lsg, sg_page(lsg), lsg->length, lsg->offset);
4844 sg_chain(lsg, 1, tsg);
4847 /* sglist can't start with chaining sg entry, fast forward */
4848 if (qc->sg == lsg) {
4857 * ata_sg_setup - DMA-map the scatter-gather table associated with a command.
4858 * @qc: Command with scatter-gather table to be mapped.
4860 * DMA-map the scatter-gather table associated with queued_cmd @qc.
4863 * spin_lock_irqsave(host lock)
4866 * Zero on success, negative on error.
4869 static int ata_sg_setup(struct ata_queued_cmd *qc)
4871 struct ata_port *ap = qc->ap;
4872 unsigned int n_elem, n_elem_extra, nbytes_extra;
4874 VPRINTK("ENTER, ata%u\n", ap->print_id);
4876 n_elem = ata_sg_setup_extra(qc, &n_elem_extra, &nbytes_extra);
4879 n_elem = dma_map_sg(ap->dev, qc->sg, n_elem, qc->dma_dir);
4881 /* restore last sg */
4883 *qc->last_sg = qc->saved_last_sg;
4886 DPRINTK("%d sg elements mapped\n", n_elem);
4889 qc->n_elem = qc->mapped_n_elem = n_elem;
4890 qc->n_elem += n_elem_extra;
4891 qc->nbytes += nbytes_extra;
4892 qc->flags |= ATA_QCFLAG_DMAMAP;
4898 * swap_buf_le16 - swap halves of 16-bit words in place
4899 * @buf: Buffer to swap
4900 * @buf_words: Number of 16-bit words in buffer.
4902 * Swap halves of 16-bit words if needed to convert from
4903 * little-endian byte order to native cpu byte order, or
4907 * Inherited from caller.
4909 void swap_buf_le16(u16 *buf, unsigned int buf_words)
4914 for (i = 0; i < buf_words; i++)
4915 buf[i] = le16_to_cpu(buf[i]);
4916 #endif /* __BIG_ENDIAN */
4920 * ata_data_xfer - Transfer data by PIO
4921 * @dev: device to target
4923 * @buflen: buffer length
4924 * @write_data: read/write
4926 * Transfer data from/to the device data register by PIO.
4929 * Inherited from caller.
4934 unsigned int ata_data_xfer(struct ata_device *dev, unsigned char *buf,
4935 unsigned int buflen, int rw)
4937 struct ata_port *ap = dev->link->ap;
4938 void __iomem *data_addr = ap->ioaddr.data_addr;
4939 unsigned int words = buflen >> 1;
4941 /* Transfer multiple of 2 bytes */
4943 ioread16_rep(data_addr, buf, words);
4945 iowrite16_rep(data_addr, buf, words);
4947 /* Transfer trailing 1 byte, if any. */
4948 if (unlikely(buflen & 0x01)) {
4949 u16 align_buf[1] = { 0 };
4950 unsigned char *trailing_buf = buf + buflen - 1;
4953 align_buf[0] = cpu_to_le16(ioread16(data_addr));
4954 memcpy(trailing_buf, align_buf, 1);
4956 memcpy(align_buf, trailing_buf, 1);
4957 iowrite16(le16_to_cpu(align_buf[0]), data_addr);
4966 * ata_data_xfer_noirq - Transfer data by PIO
4967 * @dev: device to target
4969 * @buflen: buffer length
4970 * @write_data: read/write
4972 * Transfer data from/to the device data register by PIO. Do the
4973 * transfer with interrupts disabled.
4976 * Inherited from caller.
4981 unsigned int ata_data_xfer_noirq(struct ata_device *dev, unsigned char *buf,
4982 unsigned int buflen, int rw)
4984 unsigned long flags;
4985 unsigned int consumed;
4987 local_irq_save(flags);
4988 consumed = ata_data_xfer(dev, buf, buflen, rw);
4989 local_irq_restore(flags);
4996 * ata_pio_sector - Transfer a sector of data.
4997 * @qc: Command on going
4999 * Transfer qc->sect_size bytes of data from/to the ATA device.
5002 * Inherited from caller.
5005 static void ata_pio_sector(struct ata_queued_cmd *qc)
5007 int do_write = (qc->tf.flags & ATA_TFLAG_WRITE);
5008 struct ata_port *ap = qc->ap;
5010 unsigned int offset;
5013 if (qc->curbytes == qc->nbytes - qc->sect_size)
5014 ap->hsm_task_state = HSM_ST_LAST;
5016 page = sg_page(qc->cursg);
5017 offset = qc->cursg->offset + qc->cursg_ofs;
5019 /* get the current page and offset */
5020 page = nth_page(page, (offset >> PAGE_SHIFT));
5021 offset %= PAGE_SIZE;
5023 DPRINTK("data %s\n", qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read");
5025 if (PageHighMem(page)) {
5026 unsigned long flags;
5028 /* FIXME: use a bounce buffer */
5029 local_irq_save(flags);
5030 buf = kmap_atomic(page, KM_IRQ0);
5032 /* do the actual data transfer */
5033 ap->ops->data_xfer(qc->dev, buf + offset, qc->sect_size, do_write);
5035 kunmap_atomic(buf, KM_IRQ0);
5036 local_irq_restore(flags);
5038 buf = page_address(page);
5039 ap->ops->data_xfer(qc->dev, buf + offset, qc->sect_size, do_write);
5042 qc->curbytes += qc->sect_size;
5043 qc->cursg_ofs += qc->sect_size;
5045 if (qc->cursg_ofs == qc->cursg->length) {
5046 qc->cursg = sg_next(qc->cursg);
5052 * ata_pio_sectors - Transfer one or many sectors.
5053 * @qc: Command on going
5055 * Transfer one or many sectors of data from/to the
5056 * ATA device for the DRQ request.
5059 * Inherited from caller.
5062 static void ata_pio_sectors(struct ata_queued_cmd *qc)
5064 if (is_multi_taskfile(&qc->tf)) {
5065 /* READ/WRITE MULTIPLE */
5068 WARN_ON(qc->dev->multi_count == 0);
5070 nsect = min((qc->nbytes - qc->curbytes) / qc->sect_size,
5071 qc->dev->multi_count);
5077 ata_altstatus(qc->ap); /* flush */
5081 * atapi_send_cdb - Write CDB bytes to hardware
5082 * @ap: Port to which ATAPI device is attached.
5083 * @qc: Taskfile currently active
5085 * When device has indicated its readiness to accept
5086 * a CDB, this function is called. Send the CDB.
5092 static void atapi_send_cdb(struct ata_port *ap, struct ata_queued_cmd *qc)
5095 DPRINTK("send cdb\n");
5096 WARN_ON(qc->dev->cdb_len < 12);
5098 ap->ops->data_xfer(qc->dev, qc->cdb, qc->dev->cdb_len, 1);
5099 ata_altstatus(ap); /* flush */
5101 switch (qc->tf.protocol) {
5102 case ATAPI_PROT_PIO:
5103 ap->hsm_task_state = HSM_ST;
5105 case ATAPI_PROT_NODATA:
5106 ap->hsm_task_state = HSM_ST_LAST;
5108 case ATAPI_PROT_DMA:
5109 ap->hsm_task_state = HSM_ST_LAST;
5110 /* initiate bmdma */
5111 ap->ops->bmdma_start(qc);
5117 * __atapi_pio_bytes - Transfer data from/to the ATAPI device.
5118 * @qc: Command on going
5119 * @bytes: number of bytes
5121 * Transfer Transfer data from/to the ATAPI device.
5124 * Inherited from caller.
5127 static int __atapi_pio_bytes(struct ata_queued_cmd *qc, unsigned int bytes)
5129 int do_write = (qc->tf.flags & ATA_TFLAG_WRITE);
5130 struct ata_port *ap = qc->ap;
5131 struct ata_eh_info *ehi = &qc->dev->link->eh_info;
5132 struct scatterlist *sg;
5135 unsigned int offset, count;
5139 if (unlikely(!sg)) {
5141 * The end of qc->sg is reached and the device expects
5142 * more data to transfer. In order not to overrun qc->sg
5143 * and fulfill length specified in the byte count register,
5144 * - for read case, discard trailing data from the device
5145 * - for write case, padding zero data to the device
5147 u16 pad_buf[1] = { 0 };
5150 if (bytes > qc->curbytes - qc->nbytes + ATAPI_MAX_DRAIN) {
5151 ata_ehi_push_desc(ehi, "too much trailing data "
5152 "buf=%u cur=%u bytes=%u",
5153 qc->nbytes, qc->curbytes, bytes);
5157 /* overflow is exptected for misc ATAPI commands */
5158 if (bytes && !atapi_qc_may_overflow(qc))
5159 ata_dev_printk(qc->dev, KERN_WARNING, "ATAPI %u bytes "
5160 "trailing data (cdb=%02x nbytes=%u)\n",
5161 bytes, qc->cdb[0], qc->nbytes);
5163 for (i = 0; i < (bytes + 1) / 2; i++)
5164 ap->ops->data_xfer(qc->dev, (unsigned char *)pad_buf, 2, do_write);
5166 qc->curbytes += bytes;
5172 offset = sg->offset + qc->cursg_ofs;
5174 /* get the current page and offset */
5175 page = nth_page(page, (offset >> PAGE_SHIFT));
5176 offset %= PAGE_SIZE;
5178 /* don't overrun current sg */
5179 count = min(sg->length - qc->cursg_ofs, bytes);
5181 /* don't cross page boundaries */
5182 count = min(count, (unsigned int)PAGE_SIZE - offset);
5184 DPRINTK("data %s\n", qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read");
5186 if (PageHighMem(page)) {
5187 unsigned long flags;
5189 /* FIXME: use bounce buffer */
5190 local_irq_save(flags);
5191 buf = kmap_atomic(page, KM_IRQ0);
5193 /* do the actual data transfer */
5194 ap->ops->data_xfer(qc->dev, buf + offset, count, do_write);
5196 kunmap_atomic(buf, KM_IRQ0);
5197 local_irq_restore(flags);
5199 buf = page_address(page);
5200 ap->ops->data_xfer(qc->dev, buf + offset, count, do_write);
5204 if ((count & 1) && bytes)
5206 qc->curbytes += count;
5207 qc->cursg_ofs += count;
5209 if (qc->cursg_ofs == sg->length) {
5210 qc->cursg = sg_next(qc->cursg);
5221 * atapi_pio_bytes - Transfer data from/to the ATAPI device.
5222 * @qc: Command on going
5224 * Transfer Transfer data from/to the ATAPI device.
5227 * Inherited from caller.
5230 static void atapi_pio_bytes(struct ata_queued_cmd *qc)
5232 struct ata_port *ap = qc->ap;
5233 struct ata_device *dev = qc->dev;
5234 unsigned int ireason, bc_lo, bc_hi, bytes;
5235 int i_write, do_write = (qc->tf.flags & ATA_TFLAG_WRITE) ? 1 : 0;
5237 /* Abuse qc->result_tf for temp storage of intermediate TF
5238 * here to save some kernel stack usage.
5239 * For normal completion, qc->result_tf is not relevant. For
5240 * error, qc->result_tf is later overwritten by ata_qc_complete().
5241 * So, the correctness of qc->result_tf is not affected.
5243 ap->ops->tf_read(ap, &qc->result_tf);
5244 ireason = qc->result_tf.nsect;
5245 bc_lo = qc->result_tf.lbam;
5246 bc_hi = qc->result_tf.lbah;
5247 bytes = (bc_hi << 8) | bc_lo;
5249 /* shall be cleared to zero, indicating xfer of data */
5250 if (unlikely(ireason & (1 << 0)))
5253 /* make sure transfer direction matches expected */
5254 i_write = ((ireason & (1 << 1)) == 0) ? 1 : 0;
5255 if (unlikely(do_write != i_write))
5258 if (unlikely(!bytes))
5261 VPRINTK("ata%u: xfering %d bytes\n", ap->print_id, bytes);
5263 if (__atapi_pio_bytes(qc, bytes))
5265 ata_altstatus(ap); /* flush */
5270 ata_dev_printk(dev, KERN_INFO, "ATAPI check failed\n");
5271 qc->err_mask |= AC_ERR_HSM;
5272 ap->hsm_task_state = HSM_ST_ERR;
5276 * ata_hsm_ok_in_wq - Check if the qc can be handled in the workqueue.
5277 * @ap: the target ata_port
5281 * 1 if ok in workqueue, 0 otherwise.
5284 static inline int ata_hsm_ok_in_wq(struct ata_port *ap, struct ata_queued_cmd *qc)
5286 if (qc->tf.flags & ATA_TFLAG_POLLING)
5289 if (ap->hsm_task_state == HSM_ST_FIRST) {
5290 if (qc->tf.protocol == ATA_PROT_PIO &&
5291 (qc->tf.flags & ATA_TFLAG_WRITE))
5294 if (ata_is_atapi(qc->tf.protocol) &&
5295 !(qc->dev->flags & ATA_DFLAG_CDB_INTR))
5303 * ata_hsm_qc_complete - finish a qc running on standard HSM
5304 * @qc: Command to complete
5305 * @in_wq: 1 if called from workqueue, 0 otherwise
5307 * Finish @qc which is running on standard HSM.
5310 * If @in_wq is zero, spin_lock_irqsave(host lock).
5311 * Otherwise, none on entry and grabs host lock.
5313 static void ata_hsm_qc_complete(struct ata_queued_cmd *qc, int in_wq)
5315 struct ata_port *ap = qc->ap;
5316 unsigned long flags;
5318 if (ap->ops->error_handler) {
5320 spin_lock_irqsave(ap->lock, flags);
5322 /* EH might have kicked in while host lock is
5325 qc = ata_qc_from_tag(ap, qc->tag);
5327 if (likely(!(qc->err_mask & AC_ERR_HSM))) {
5328 ap->ops->irq_on(ap);
5329 ata_qc_complete(qc);
5331 ata_port_freeze(ap);
5334 spin_unlock_irqrestore(ap->lock, flags);
5336 if (likely(!(qc->err_mask & AC_ERR_HSM)))
5337 ata_qc_complete(qc);
5339 ata_port_freeze(ap);
5343 spin_lock_irqsave(ap->lock, flags);
5344 ap->ops->irq_on(ap);
5345 ata_qc_complete(qc);
5346 spin_unlock_irqrestore(ap->lock, flags);
5348 ata_qc_complete(qc);
5353 * ata_hsm_move - move the HSM to the next state.
5354 * @ap: the target ata_port
5356 * @status: current device status
5357 * @in_wq: 1 if called from workqueue, 0 otherwise
5360 * 1 when poll next status needed, 0 otherwise.
5362 int ata_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc,
5363 u8 status, int in_wq)
5365 unsigned long flags = 0;
5368 WARN_ON((qc->flags & ATA_QCFLAG_ACTIVE) == 0);
5370 /* Make sure ata_qc_issue_prot() does not throw things
5371 * like DMA polling into the workqueue. Notice that
5372 * in_wq is not equivalent to (qc->tf.flags & ATA_TFLAG_POLLING).
5374 WARN_ON(in_wq != ata_hsm_ok_in_wq(ap, qc));
5377 DPRINTK("ata%u: protocol %d task_state %d (dev_stat 0x%X)\n",
5378 ap->print_id, qc->tf.protocol, ap->hsm_task_state, status);
5380 switch (ap->hsm_task_state) {
5382 /* Send first data block or PACKET CDB */
5384 /* If polling, we will stay in the work queue after
5385 * sending the data. Otherwise, interrupt handler
5386 * takes over after sending the data.
5388 poll_next = (qc->tf.flags & ATA_TFLAG_POLLING);
5390 /* check device status */
5391 if (unlikely((status & ATA_DRQ) == 0)) {
5392 /* handle BSY=0, DRQ=0 as error */
5393 if (likely(status & (ATA_ERR | ATA_DF)))
5394 /* device stops HSM for abort/error */
5395 qc->err_mask |= AC_ERR_DEV;
5397 /* HSM violation. Let EH handle this */
5398 qc->err_mask |= AC_ERR_HSM;
5400 ap->hsm_task_state = HSM_ST_ERR;
5404 /* Device should not ask for data transfer (DRQ=1)
5405 * when it finds something wrong.
5406 * We ignore DRQ here and stop the HSM by
5407 * changing hsm_task_state to HSM_ST_ERR and
5408 * let the EH abort the command or reset the device.
5410 if (unlikely(status & (ATA_ERR | ATA_DF))) {
5411 /* Some ATAPI tape drives forget to clear the ERR bit
5412 * when doing the next command (mostly request sense).
5413 * We ignore ERR here to workaround and proceed sending
5416 if (!(qc->dev->horkage & ATA_HORKAGE_STUCK_ERR)) {
5417 ata_port_printk(ap, KERN_WARNING,
5418 "DRQ=1 with device error, "
5419 "dev_stat 0x%X\n", status);
5420 qc->err_mask |= AC_ERR_HSM;
5421 ap->hsm_task_state = HSM_ST_ERR;
5426 /* Send the CDB (atapi) or the first data block (ata pio out).
5427 * During the state transition, interrupt handler shouldn't
5428 * be invoked before the data transfer is complete and
5429 * hsm_task_state is changed. Hence, the following locking.
5432 spin_lock_irqsave(ap->lock, flags);
5434 if (qc->tf.protocol == ATA_PROT_PIO) {
5435 /* PIO data out protocol.
5436 * send first data block.
5439 /* ata_pio_sectors() might change the state
5440 * to HSM_ST_LAST. so, the state is changed here
5441 * before ata_pio_sectors().
5443 ap->hsm_task_state = HSM_ST;
5444 ata_pio_sectors(qc);
5447 atapi_send_cdb(ap, qc);
5450 spin_unlock_irqrestore(ap->lock, flags);
5452 /* if polling, ata_pio_task() handles the rest.
5453 * otherwise, interrupt handler takes over from here.
5458 /* complete command or read/write the data register */
5459 if (qc->tf.protocol == ATAPI_PROT_PIO) {
5460 /* ATAPI PIO protocol */
5461 if ((status & ATA_DRQ) == 0) {
5462 /* No more data to transfer or device error.
5463 * Device error will be tagged in HSM_ST_LAST.
5465 ap->hsm_task_state = HSM_ST_LAST;
5469 /* Device should not ask for data transfer (DRQ=1)
5470 * when it finds something wrong.
5471 * We ignore DRQ here and stop the HSM by
5472 * changing hsm_task_state to HSM_ST_ERR and
5473 * let the EH abort the command or reset the device.
5475 if (unlikely(status & (ATA_ERR | ATA_DF))) {
5476 ata_port_printk(ap, KERN_WARNING, "DRQ=1 with "
5477 "device error, dev_stat 0x%X\n",
5479 qc->err_mask |= AC_ERR_HSM;
5480 ap->hsm_task_state = HSM_ST_ERR;
5484 atapi_pio_bytes(qc);
5486 if (unlikely(ap->hsm_task_state == HSM_ST_ERR))
5487 /* bad ireason reported by device */
5491 /* ATA PIO protocol */
5492 if (unlikely((status & ATA_DRQ) == 0)) {
5493 /* handle BSY=0, DRQ=0 as error */
5494 if (likely(status & (ATA_ERR | ATA_DF)))
5495 /* device stops HSM for abort/error */
5496 qc->err_mask |= AC_ERR_DEV;
5498 /* HSM violation. Let EH handle this.
5499 * Phantom devices also trigger this
5500 * condition. Mark hint.
5502 qc->err_mask |= AC_ERR_HSM |
5505 ap->hsm_task_state = HSM_ST_ERR;
5509 /* For PIO reads, some devices may ask for
5510 * data transfer (DRQ=1) alone with ERR=1.
5511 * We respect DRQ here and transfer one
5512 * block of junk data before changing the
5513 * hsm_task_state to HSM_ST_ERR.
5515 * For PIO writes, ERR=1 DRQ=1 doesn't make
5516 * sense since the data block has been
5517 * transferred to the device.
5519 if (unlikely(status & (ATA_ERR | ATA_DF))) {
5520 /* data might be corrputed */
5521 qc->err_mask |= AC_ERR_DEV;
5523 if (!(qc->tf.flags & ATA_TFLAG_WRITE)) {
5524 ata_pio_sectors(qc);
5525 status = ata_wait_idle(ap);
5528 if (status & (ATA_BUSY | ATA_DRQ))
5529 qc->err_mask |= AC_ERR_HSM;
5531 /* ata_pio_sectors() might change the
5532 * state to HSM_ST_LAST. so, the state
5533 * is changed after ata_pio_sectors().
5535 ap->hsm_task_state = HSM_ST_ERR;
5539 ata_pio_sectors(qc);
5541 if (ap->hsm_task_state == HSM_ST_LAST &&
5542 (!(qc->tf.flags & ATA_TFLAG_WRITE))) {
5544 status = ata_wait_idle(ap);
5553 if (unlikely(!ata_ok(status))) {
5554 qc->err_mask |= __ac_err_mask(status);
5555 ap->hsm_task_state = HSM_ST_ERR;
5559 /* no more data to transfer */
5560 DPRINTK("ata%u: dev %u command complete, drv_stat 0x%x\n",
5561 ap->print_id, qc->dev->devno, status);
5563 WARN_ON(qc->err_mask);
5565 ap->hsm_task_state = HSM_ST_IDLE;
5567 /* complete taskfile transaction */
5568 ata_hsm_qc_complete(qc, in_wq);
5574 /* make sure qc->err_mask is available to
5575 * know what's wrong and recover
5577 WARN_ON(qc->err_mask == 0);
5579 ap->hsm_task_state = HSM_ST_IDLE;
5581 /* complete taskfile transaction */
5582 ata_hsm_qc_complete(qc, in_wq);
5594 static void ata_pio_task(struct work_struct *work)
5596 struct ata_port *ap =
5597 container_of(work, struct ata_port, port_task.work);
5598 struct ata_queued_cmd *qc = ap->port_task_data;
5603 WARN_ON(ap->hsm_task_state == HSM_ST_IDLE);
5606 * This is purely heuristic. This is a fast path.
5607 * Sometimes when we enter, BSY will be cleared in
5608 * a chk-status or two. If not, the drive is probably seeking
5609 * or something. Snooze for a couple msecs, then
5610 * chk-status again. If still busy, queue delayed work.
5612 status = ata_busy_wait(ap, ATA_BUSY, 5);
5613 if (status & ATA_BUSY) {
5615 status = ata_busy_wait(ap, ATA_BUSY, 10);
5616 if (status & ATA_BUSY) {
5617 ata_port_queue_task(ap, ata_pio_task, qc, ATA_SHORT_PAUSE);
5623 poll_next = ata_hsm_move(ap, qc, status, 1);
5625 /* another command or interrupt handler
5626 * may be running at this point.
5633 * ata_qc_new - Request an available ATA command, for queueing
5634 * @ap: Port associated with device @dev
5635 * @dev: Device from whom we request an available command structure
5641 static struct ata_queued_cmd *ata_qc_new(struct ata_port *ap)
5643 struct ata_queued_cmd *qc = NULL;
5646 /* no command while frozen */
5647 if (unlikely(ap->pflags & ATA_PFLAG_FROZEN))
5650 /* the last tag is reserved for internal command. */
5651 for (i = 0; i < ATA_MAX_QUEUE - 1; i++)
5652 if (!test_and_set_bit(i, &ap->qc_allocated)) {
5653 qc = __ata_qc_from_tag(ap, i);
5664 * ata_qc_new_init - Request an available ATA command, and initialize it
5665 * @dev: Device from whom we request an available command structure
5671 struct ata_queued_cmd *ata_qc_new_init(struct ata_device *dev)
5673 struct ata_port *ap = dev->link->ap;
5674 struct ata_queued_cmd *qc;
5676 qc = ata_qc_new(ap);
5689 * ata_qc_free - free unused ata_queued_cmd
5690 * @qc: Command to complete
5692 * Designed to free unused ata_queued_cmd object
5693 * in case something prevents using it.
5696 * spin_lock_irqsave(host lock)
5698 void ata_qc_free(struct ata_queued_cmd *qc)
5700 struct ata_port *ap = qc->ap;
5703 WARN_ON(qc == NULL); /* ata_qc_from_tag _might_ return NULL */
5707 if (likely(ata_tag_valid(tag))) {
5708 qc->tag = ATA_TAG_POISON;
5709 clear_bit(tag, &ap->qc_allocated);
5713 void __ata_qc_complete(struct ata_queued_cmd *qc)
5715 struct ata_port *ap = qc->ap;
5716 struct ata_link *link = qc->dev->link;
5718 WARN_ON(qc == NULL); /* ata_qc_from_tag _might_ return NULL */
5719 WARN_ON(!(qc->flags & ATA_QCFLAG_ACTIVE));
5721 if (likely(qc->flags & ATA_QCFLAG_DMAMAP))
5724 /* command should be marked inactive atomically with qc completion */
5725 if (qc->tf.protocol == ATA_PROT_NCQ) {
5726 link->sactive &= ~(1 << qc->tag);
5728 ap->nr_active_links--;
5730 link->active_tag = ATA_TAG_POISON;
5731 ap->nr_active_links--;
5734 /* clear exclusive status */
5735 if (unlikely(qc->flags & ATA_QCFLAG_CLEAR_EXCL &&
5736 ap->excl_link == link))
5737 ap->excl_link = NULL;
5739 /* atapi: mark qc as inactive to prevent the interrupt handler
5740 * from completing the command twice later, before the error handler
5741 * is called. (when rc != 0 and atapi request sense is needed)
5743 qc->flags &= ~ATA_QCFLAG_ACTIVE;
5744 ap->qc_active &= ~(1 << qc->tag);
5746 /* call completion callback */
5747 qc->complete_fn(qc);
5750 static void fill_result_tf(struct ata_queued_cmd *qc)
5752 struct ata_port *ap = qc->ap;
5754 qc->result_tf.flags = qc->tf.flags;
5755 ap->ops->tf_read(ap, &qc->result_tf);
5758 static void ata_verify_xfer(struct ata_queued_cmd *qc)
5760 struct ata_device *dev = qc->dev;
5762 if (ata_tag_internal(qc->tag))
5765 if (ata_is_nodata(qc->tf.protocol))
5768 if ((dev->mwdma_mask || dev->udma_mask) && ata_is_pio(qc->tf.protocol))
5771 dev->flags &= ~ATA_DFLAG_DUBIOUS_XFER;
5775 * ata_qc_complete - Complete an active ATA command
5776 * @qc: Command to complete
5777 * @err_mask: ATA Status register contents
5779 * Indicate to the mid and upper layers that an ATA
5780 * command has completed, with either an ok or not-ok status.
5783 * spin_lock_irqsave(host lock)
5785 void ata_qc_complete(struct ata_queued_cmd *qc)
5787 struct ata_port *ap = qc->ap;
5789 /* XXX: New EH and old EH use different mechanisms to
5790 * synchronize EH with regular execution path.
5792 * In new EH, a failed qc is marked with ATA_QCFLAG_FAILED.
5793 * Normal execution path is responsible for not accessing a
5794 * failed qc. libata core enforces the rule by returning NULL
5795 * from ata_qc_from_tag() for failed qcs.
5797 * Old EH depends on ata_qc_complete() nullifying completion
5798 * requests if ATA_QCFLAG_EH_SCHEDULED is set. Old EH does
5799 * not synchronize with interrupt handler. Only PIO task is
5802 if (ap->ops->error_handler) {
5803 struct ata_device *dev = qc->dev;
5804 struct ata_eh_info *ehi = &dev->link->eh_info;
5806 WARN_ON(ap->pflags & ATA_PFLAG_FROZEN);
5808 if (unlikely(qc->err_mask))
5809 qc->flags |= ATA_QCFLAG_FAILED;
5811 if (unlikely(qc->flags & ATA_QCFLAG_FAILED)) {
5812 if (!ata_tag_internal(qc->tag)) {
5813 /* always fill result TF for failed qc */
5815 ata_qc_schedule_eh(qc);
5820 /* read result TF if requested */
5821 if (qc->flags & ATA_QCFLAG_RESULT_TF)
5824 /* Some commands need post-processing after successful
5827 switch (qc->tf.command) {
5828 case ATA_CMD_SET_FEATURES:
5829 if (qc->tf.feature != SETFEATURES_WC_ON &&
5830 qc->tf.feature != SETFEATURES_WC_OFF)
5833 case ATA_CMD_INIT_DEV_PARAMS: /* CHS translation changed */
5834 case ATA_CMD_SET_MULTI: /* multi_count changed */
5835 /* revalidate device */
5836 ehi->dev_action[dev->devno] |= ATA_EH_REVALIDATE;
5837 ata_port_schedule_eh(ap);
5841 dev->flags |= ATA_DFLAG_SLEEPING;
5845 if (unlikely(dev->flags & ATA_DFLAG_DUBIOUS_XFER))
5846 ata_verify_xfer(qc);
5848 __ata_qc_complete(qc);
5850 if (qc->flags & ATA_QCFLAG_EH_SCHEDULED)
5853 /* read result TF if failed or requested */
5854 if (qc->err_mask || qc->flags & ATA_QCFLAG_RESULT_TF)
5857 __ata_qc_complete(qc);
5862 * ata_qc_complete_multiple - Complete multiple qcs successfully
5863 * @ap: port in question
5864 * @qc_active: new qc_active mask
5865 * @finish_qc: LLDD callback invoked before completing a qc
5867 * Complete in-flight commands. This functions is meant to be
5868 * called from low-level driver's interrupt routine to complete
5869 * requests normally. ap->qc_active and @qc_active is compared
5870 * and commands are completed accordingly.
5873 * spin_lock_irqsave(host lock)
5876 * Number of completed commands on success, -errno otherwise.
5878 int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active,
5879 void (*finish_qc)(struct ata_queued_cmd *))
5885 done_mask = ap->qc_active ^ qc_active;
5887 if (unlikely(done_mask & qc_active)) {
5888 ata_port_printk(ap, KERN_ERR, "illegal qc_active transition "
5889 "(%08x->%08x)\n", ap->qc_active, qc_active);
5893 for (i = 0; i < ATA_MAX_QUEUE; i++) {
5894 struct ata_queued_cmd *qc;
5896 if (!(done_mask & (1 << i)))
5899 if ((qc = ata_qc_from_tag(ap, i))) {
5902 ata_qc_complete(qc);
5911 * ata_qc_issue - issue taskfile to device
5912 * @qc: command to issue to device
5914 * Prepare an ATA command to submission to device.
5915 * This includes mapping the data into a DMA-able
5916 * area, filling in the S/G table, and finally
5917 * writing the taskfile to hardware, starting the command.
5920 * spin_lock_irqsave(host lock)
5922 void ata_qc_issue(struct ata_queued_cmd *qc)
5924 struct ata_port *ap = qc->ap;
5925 struct ata_link *link = qc->dev->link;
5926 u8 prot = qc->tf.protocol;
5928 /* Make sure only one non-NCQ command is outstanding. The
5929 * check is skipped for old EH because it reuses active qc to
5930 * request ATAPI sense.
5932 WARN_ON(ap->ops->error_handler && ata_tag_valid(link->active_tag));
5934 if (ata_is_ncq(prot)) {
5935 WARN_ON(link->sactive & (1 << qc->tag));
5938 ap->nr_active_links++;
5939 link->sactive |= 1 << qc->tag;
5941 WARN_ON(link->sactive);
5943 ap->nr_active_links++;
5944 link->active_tag = qc->tag;
5947 qc->flags |= ATA_QCFLAG_ACTIVE;
5948 ap->qc_active |= 1 << qc->tag;
5950 /* We guarantee to LLDs that they will have at least one
5951 * non-zero sg if the command is a data command.
5953 BUG_ON(ata_is_data(prot) && (!qc->sg || !qc->n_elem || !qc->nbytes));
5955 /* ata_sg_setup() may update nbytes */
5956 qc->raw_nbytes = qc->nbytes;
5958 if (ata_is_dma(prot) || (ata_is_pio(prot) &&
5959 (ap->flags & ATA_FLAG_PIO_DMA)))
5960 if (ata_sg_setup(qc))
5963 /* if device is sleeping, schedule softreset and abort the link */
5964 if (unlikely(qc->dev->flags & ATA_DFLAG_SLEEPING)) {
5965 link->eh_info.action |= ATA_EH_SOFTRESET;
5966 ata_ehi_push_desc(&link->eh_info, "waking up from sleep");
5967 ata_link_abort(link);
5971 ap->ops->qc_prep(qc);
5973 qc->err_mask |= ap->ops->qc_issue(qc);
5974 if (unlikely(qc->err_mask))
5979 qc->err_mask |= AC_ERR_SYSTEM;
5981 ata_qc_complete(qc);
5985 * ata_qc_issue_prot - issue taskfile to device in proto-dependent manner
5986 * @qc: command to issue to device
5988 * Using various libata functions and hooks, this function
5989 * starts an ATA command. ATA commands are grouped into
5990 * classes called "protocols", and issuing each type of protocol
5991 * is slightly different.
5993 * May be used as the qc_issue() entry in ata_port_operations.
5996 * spin_lock_irqsave(host lock)
5999 * Zero on success, AC_ERR_* mask on failure
6002 unsigned int ata_qc_issue_prot(struct ata_queued_cmd *qc)
6004 struct ata_port *ap = qc->ap;
6006 /* Use polling pio if the LLD doesn't handle
6007 * interrupt driven pio and atapi CDB interrupt.
6009 if (ap->flags & ATA_FLAG_PIO_POLLING) {
6010 switch (qc->tf.protocol) {
6012 case ATA_PROT_NODATA:
6013 case ATAPI_PROT_PIO:
6014 case ATAPI_PROT_NODATA:
6015 qc->tf.flags |= ATA_TFLAG_POLLING;
6017 case ATAPI_PROT_DMA:
6018 if (qc->dev->flags & ATA_DFLAG_CDB_INTR)
6019 /* see ata_dma_blacklisted() */
6027 /* select the device */
6028 ata_dev_select(ap, qc->dev->devno, 1, 0);
6030 /* start the command */
6031 switch (qc->tf.protocol) {
6032 case ATA_PROT_NODATA:
6033 if (qc->tf.flags & ATA_TFLAG_POLLING)
6034 ata_qc_set_polling(qc);
6036 ata_tf_to_host(ap, &qc->tf);
6037 ap->hsm_task_state = HSM_ST_LAST;
6039 if (qc->tf.flags & ATA_TFLAG_POLLING)
6040 ata_port_queue_task(ap, ata_pio_task, qc, 0);
6045 WARN_ON(qc->tf.flags & ATA_TFLAG_POLLING);
6047 ap->ops->tf_load(ap, &qc->tf); /* load tf registers */
6048 ap->ops->bmdma_setup(qc); /* set up bmdma */
6049 ap->ops->bmdma_start(qc); /* initiate bmdma */
6050 ap->hsm_task_state = HSM_ST_LAST;
6054 if (qc->tf.flags & ATA_TFLAG_POLLING)
6055 ata_qc_set_polling(qc);
6057 ata_tf_to_host(ap, &qc->tf);
6059 if (qc->tf.flags & ATA_TFLAG_WRITE) {
6060 /* PIO data out protocol */
6061 ap->hsm_task_state = HSM_ST_FIRST;
6062 ata_port_queue_task(ap, ata_pio_task, qc, 0);
6064 /* always send first data block using
6065 * the ata_pio_task() codepath.
6068 /* PIO data in protocol */
6069 ap->hsm_task_state = HSM_ST;
6071 if (qc->tf.flags & ATA_TFLAG_POLLING)
6072 ata_port_queue_task(ap, ata_pio_task, qc, 0);
6074 /* if polling, ata_pio_task() handles the rest.
6075 * otherwise, interrupt handler takes over from here.
6081 case ATAPI_PROT_PIO:
6082 case ATAPI_PROT_NODATA:
6083 if (qc->tf.flags & ATA_TFLAG_POLLING)
6084 ata_qc_set_polling(qc);
6086 ata_tf_to_host(ap, &qc->tf);
6088 ap->hsm_task_state = HSM_ST_FIRST;
6090 /* send cdb by polling if no cdb interrupt */
6091 if ((!(qc->dev->flags & ATA_DFLAG_CDB_INTR)) ||
6092 (qc->tf.flags & ATA_TFLAG_POLLING))
6093 ata_port_queue_task(ap, ata_pio_task, qc, 0);
6096 case ATAPI_PROT_DMA:
6097 WARN_ON(qc->tf.flags & ATA_TFLAG_POLLING);
6099 ap->ops->tf_load(ap, &qc->tf); /* load tf registers */
6100 ap->ops->bmdma_setup(qc); /* set up bmdma */
6101 ap->hsm_task_state = HSM_ST_FIRST;
6103 /* send cdb by polling if no cdb interrupt */
6104 if (!(qc->dev->flags & ATA_DFLAG_CDB_INTR))
6105 ata_port_queue_task(ap, ata_pio_task, qc, 0);
6110 return AC_ERR_SYSTEM;
6117 * ata_host_intr - Handle host interrupt for given (port, task)
6118 * @ap: Port on which interrupt arrived (possibly...)
6119 * @qc: Taskfile currently active in engine
6121 * Handle host interrupt for given queued command. Currently,
6122 * only DMA interrupts are handled. All other commands are
6123 * handled via polling with interrupts disabled (nIEN bit).
6126 * spin_lock_irqsave(host lock)
6129 * One if interrupt was handled, zero if not (shared irq).
6132 inline unsigned int ata_host_intr(struct ata_port *ap,
6133 struct ata_queued_cmd *qc)
6135 struct ata_eh_info *ehi = &ap->link.eh_info;
6136 u8 status, host_stat = 0;
6138 VPRINTK("ata%u: protocol %d task_state %d\n",
6139 ap->print_id, qc->tf.protocol, ap->hsm_task_state);
6141 /* Check whether we are expecting interrupt in this state */
6142 switch (ap->hsm_task_state) {
6144 /* Some pre-ATAPI-4 devices assert INTRQ
6145 * at this state when ready to receive CDB.
6148 /* Check the ATA_DFLAG_CDB_INTR flag is enough here.
6149 * The flag was turned on only for atapi devices. No
6150 * need to check ata_is_atapi(qc->tf.protocol) again.
6152 if (!(qc->dev->flags & ATA_DFLAG_CDB_INTR))
6156 if (qc->tf.protocol == ATA_PROT_DMA ||
6157 qc->tf.protocol == ATAPI_PROT_DMA) {
6158 /* check status of DMA engine */
6159 host_stat = ap->ops->bmdma_status(ap);
6160 VPRINTK("ata%u: host_stat 0x%X\n",
6161 ap->print_id, host_stat);
6163 /* if it's not our irq... */
6164 if (!(host_stat & ATA_DMA_INTR))
6167 /* before we do anything else, clear DMA-Start bit */
6168 ap->ops->bmdma_stop(qc);
6170 if (unlikely(host_stat & ATA_DMA_ERR)) {
6171 /* error when transfering data to/from memory */
6172 qc->err_mask |= AC_ERR_HOST_BUS;
6173 ap->hsm_task_state = HSM_ST_ERR;
6183 /* check altstatus */
6184 status = ata_altstatus(ap);
6185 if (status & ATA_BUSY)
6188 /* check main status, clearing INTRQ */
6189 status = ata_chk_status(ap);
6190 if (unlikely(status & ATA_BUSY))
6193 /* ack bmdma irq events */
6194 ap->ops->irq_clear(ap);
6196 ata_hsm_move(ap, qc, status, 0);
6198 if (unlikely(qc->err_mask) && (qc->tf.protocol == ATA_PROT_DMA ||
6199 qc->tf.protocol == ATAPI_PROT_DMA))
6200 ata_ehi_push_desc(ehi, "BMDMA stat 0x%x", host_stat);
6202 return 1; /* irq handled */
6205 ap->stats.idle_irq++;
6208 if ((ap->stats.idle_irq % 1000) == 0) {
6210 ap->ops->irq_clear(ap);
6211 ata_port_printk(ap, KERN_WARNING, "irq trap\n");
6215 return 0; /* irq not handled */
6219 * ata_interrupt - Default ATA host interrupt handler
6220 * @irq: irq line (unused)
6221 * @dev_instance: pointer to our ata_host information structure
6223 * Default interrupt handler for PCI IDE devices. Calls
6224 * ata_host_intr() for each port that is not disabled.
6227 * Obtains host lock during operation.
6230 * IRQ_NONE or IRQ_HANDLED.
6233 irqreturn_t ata_interrupt(int irq, void *dev_instance)
6235 struct ata_host *host = dev_instance;
6237 unsigned int handled = 0;
6238 unsigned long flags;
6240 /* TODO: make _irqsave conditional on x86 PCI IDE legacy mode */
6241 spin_lock_irqsave(&host->lock, flags);
6243 for (i = 0; i < host->n_ports; i++) {
6244 struct ata_port *ap;
6246 ap = host->ports[i];
6248 !(ap->flags & ATA_FLAG_DISABLED)) {
6249 struct ata_queued_cmd *qc;
6251 qc = ata_qc_from_tag(ap, ap->link.active_tag);
6252 if (qc && (!(qc->tf.flags & ATA_TFLAG_POLLING)) &&
6253 (qc->flags & ATA_QCFLAG_ACTIVE))
6254 handled |= ata_host_intr(ap, qc);
6258 spin_unlock_irqrestore(&host->lock, flags);
6260 return IRQ_RETVAL(handled);
6264 * sata_scr_valid - test whether SCRs are accessible
6265 * @link: ATA link to test SCR accessibility for
6267 * Test whether SCRs are accessible for @link.
6273 * 1 if SCRs are accessible, 0 otherwise.
6275 int sata_scr_valid(struct ata_link *link)
6277 struct ata_port *ap = link->ap;
6279 return (ap->flags & ATA_FLAG_SATA) && ap->ops->scr_read;
6283 * sata_scr_read - read SCR register of the specified port
6284 * @link: ATA link to read SCR for
6286 * @val: Place to store read value
6288 * Read SCR register @reg of @link into *@val. This function is
6289 * guaranteed to succeed if @link is ap->link, the cable type of
6290 * the port is SATA and the port implements ->scr_read.
6293 * None if @link is ap->link. Kernel thread context otherwise.
6296 * 0 on success, negative errno on failure.
6298 int sata_scr_read(struct ata_link *link, int reg, u32 *val)
6300 if (ata_is_host_link(link)) {
6301 struct ata_port *ap = link->ap;
6303 if (sata_scr_valid(link))
6304 return ap->ops->scr_read(ap, reg, val);
6308 return sata_pmp_scr_read(link, reg, val);
6312 * sata_scr_write - write SCR register of the specified port
6313 * @link: ATA link to write SCR for
6314 * @reg: SCR to write
6315 * @val: value to write
6317 * Write @val to SCR register @reg of @link. This function is
6318 * guaranteed to succeed if @link is ap->link, the cable type of
6319 * the port is SATA and the port implements ->scr_read.
6322 * None if @link is ap->link. Kernel thread context otherwise.
6325 * 0 on success, negative errno on failure.
6327 int sata_scr_write(struct ata_link *link, int reg, u32 val)
6329 if (ata_is_host_link(link)) {
6330 struct ata_port *ap = link->ap;
6332 if (sata_scr_valid(link))
6333 return ap->ops->scr_write(ap, reg, val);
6337 return sata_pmp_scr_write(link, reg, val);
6341 * sata_scr_write_flush - write SCR register of the specified port and flush
6342 * @link: ATA link to write SCR for
6343 * @reg: SCR to write
6344 * @val: value to write
6346 * This function is identical to sata_scr_write() except that this
6347 * function performs flush after writing to the register.
6350 * None if @link is ap->link. Kernel thread context otherwise.
6353 * 0 on success, negative errno on failure.
6355 int sata_scr_write_flush(struct ata_link *link, int reg, u32 val)
6357 if (ata_is_host_link(link)) {
6358 struct ata_port *ap = link->ap;
6361 if (sata_scr_valid(link)) {
6362 rc = ap->ops->scr_write(ap, reg, val);
6364 rc = ap->ops->scr_read(ap, reg, &val);
6370 return sata_pmp_scr_write(link, reg, val);
6374 * ata_link_online - test whether the given link is online
6375 * @link: ATA link to test
6377 * Test whether @link is online. Note that this function returns
6378 * 0 if online status of @link cannot be obtained, so
6379 * ata_link_online(link) != !ata_link_offline(link).
6385 * 1 if the port online status is available and online.
6387 int ata_link_online(struct ata_link *link)
6391 if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0 &&
6392 (sstatus & 0xf) == 0x3)
6398 * ata_link_offline - test whether the given link is offline
6399 * @link: ATA link to test
6401 * Test whether @link is offline. Note that this function
6402 * returns 0 if offline status of @link cannot be obtained, so
6403 * ata_link_online(link) != !ata_link_offline(link).
6409 * 1 if the port offline status is available and offline.
6411 int ata_link_offline(struct ata_link *link)
6415 if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0 &&
6416 (sstatus & 0xf) != 0x3)
6421 int ata_flush_cache(struct ata_device *dev)
6423 unsigned int err_mask;
6426 if (!ata_try_flush_cache(dev))
6429 if (dev->flags & ATA_DFLAG_FLUSH_EXT)
6430 cmd = ATA_CMD_FLUSH_EXT;
6432 cmd = ATA_CMD_FLUSH;
6434 /* This is wrong. On a failed flush we get back the LBA of the lost
6435 sector and we should (assuming it wasn't aborted as unknown) issue
6436 a further flush command to continue the writeback until it
6438 err_mask = ata_do_simple_cmd(dev, cmd);
6440 ata_dev_printk(dev, KERN_ERR, "failed to flush cache\n");
6448 static int ata_host_request_pm(struct ata_host *host, pm_message_t mesg,
6449 unsigned int action, unsigned int ehi_flags,
6452 unsigned long flags;
6455 for (i = 0; i < host->n_ports; i++) {
6456 struct ata_port *ap = host->ports[i];
6457 struct ata_link *link;
6459 /* Previous resume operation might still be in
6460 * progress. Wait for PM_PENDING to clear.
6462 if (ap->pflags & ATA_PFLAG_PM_PENDING) {
6463 ata_port_wait_eh(ap);
6464 WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING);
6467 /* request PM ops to EH */
6468 spin_lock_irqsave(ap->lock, flags);
6473 ap->pm_result = &rc;
6476 ap->pflags |= ATA_PFLAG_PM_PENDING;
6477 __ata_port_for_each_link(link, ap) {
6478 link->eh_info.action |= action;
6479 link->eh_info.flags |= ehi_flags;
6482 ata_port_schedule_eh(ap);
6484 spin_unlock_irqrestore(ap->lock, flags);
6486 /* wait and check result */
6488 ata_port_wait_eh(ap);
6489 WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING);
6499 * ata_host_suspend - suspend host
6500 * @host: host to suspend
6503 * Suspend @host. Actual operation is performed by EH. This
6504 * function requests EH to perform PM operations and waits for EH
6508 * Kernel thread context (may sleep).
6511 * 0 on success, -errno on failure.
6513 int ata_host_suspend(struct ata_host *host, pm_message_t mesg)
6518 * disable link pm on all ports before requesting
6521 ata_lpm_enable(host);
6523 rc = ata_host_request_pm(host, mesg, 0, ATA_EHI_QUIET, 1);
6525 host->dev->power.power_state = mesg;
6530 * ata_host_resume - resume host
6531 * @host: host to resume
6533 * Resume @host. Actual operation is performed by EH. This
6534 * function requests EH to perform PM operations and returns.
6535 * Note that all resume operations are performed parallely.
6538 * Kernel thread context (may sleep).
6540 void ata_host_resume(struct ata_host *host)
6542 ata_host_request_pm(host, PMSG_ON, ATA_EH_SOFTRESET,
6543 ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET, 0);
6544 host->dev->power.power_state = PMSG_ON;
6546 /* reenable link pm */
6547 ata_lpm_disable(host);
6552 * ata_port_start - Set port up for dma.
6553 * @ap: Port to initialize
6555 * Called just after data structures for each port are
6556 * initialized. Allocates space for PRD table.
6558 * May be used as the port_start() entry in ata_port_operations.
6561 * Inherited from caller.
6563 int ata_port_start(struct ata_port *ap)
6565 struct device *dev = ap->dev;
6568 ap->prd = dmam_alloc_coherent(dev, ATA_PRD_TBL_SZ, &ap->prd_dma,
6573 rc = ata_pad_alloc(ap, dev);
6577 DPRINTK("prd alloc, virt %p, dma %llx\n", ap->prd,
6578 (unsigned long long)ap->prd_dma);
6583 * ata_dev_init - Initialize an ata_device structure
6584 * @dev: Device structure to initialize
6586 * Initialize @dev in preparation for probing.
6589 * Inherited from caller.
6591 void ata_dev_init(struct ata_device *dev)
6593 struct ata_link *link = dev->link;
6594 struct ata_port *ap = link->ap;
6595 unsigned long flags;
6597 /* SATA spd limit is bound to the first device */
6598 link->sata_spd_limit = link->hw_sata_spd_limit;
6601 /* High bits of dev->flags are used to record warm plug
6602 * requests which occur asynchronously. Synchronize using
6605 spin_lock_irqsave(ap->lock, flags);
6606 dev->flags &= ~ATA_DFLAG_INIT_MASK;
6608 spin_unlock_irqrestore(ap->lock, flags);
6610 memset((void *)dev + ATA_DEVICE_CLEAR_OFFSET, 0,
6611 sizeof(*dev) - ATA_DEVICE_CLEAR_OFFSET);
6612 dev->pio_mask = UINT_MAX;
6613 dev->mwdma_mask = UINT_MAX;
6614 dev->udma_mask = UINT_MAX;
6618 * ata_link_init - Initialize an ata_link structure
6619 * @ap: ATA port link is attached to
6620 * @link: Link structure to initialize
6621 * @pmp: Port multiplier port number
6626 * Kernel thread context (may sleep)
6628 void ata_link_init(struct ata_port *ap, struct ata_link *link, int pmp)
6632 /* clear everything except for devices */
6633 memset(link, 0, offsetof(struct ata_link, device[0]));
6637 link->active_tag = ATA_TAG_POISON;
6638 link->hw_sata_spd_limit = UINT_MAX;
6640 /* can't use iterator, ap isn't initialized yet */
6641 for (i = 0; i < ATA_MAX_DEVICES; i++) {
6642 struct ata_device *dev = &link->device[i];
6645 dev->devno = dev - link->device;
6651 * sata_link_init_spd - Initialize link->sata_spd_limit
6652 * @link: Link to configure sata_spd_limit for
6654 * Initialize @link->[hw_]sata_spd_limit to the currently
6658 * Kernel thread context (may sleep).
6661 * 0 on success, -errno on failure.
6663 int sata_link_init_spd(struct ata_link *link)
6668 rc = sata_scr_read(link, SCR_CONTROL, &scontrol);
6672 spd = (scontrol >> 4) & 0xf;
6674 link->hw_sata_spd_limit &= (1 << spd) - 1;
6676 link->sata_spd_limit = link->hw_sata_spd_limit;
6682 * ata_port_alloc - allocate and initialize basic ATA port resources
6683 * @host: ATA host this allocated port belongs to
6685 * Allocate and initialize basic ATA port resources.
6688 * Allocate ATA port on success, NULL on failure.
6691 * Inherited from calling layer (may sleep).
6693 struct ata_port *ata_port_alloc(struct ata_host *host)
6695 struct ata_port *ap;
6699 ap = kzalloc(sizeof(*ap), GFP_KERNEL);
6703 ap->pflags |= ATA_PFLAG_INITIALIZING;
6704 ap->lock = &host->lock;
6705 ap->flags = ATA_FLAG_DISABLED;
6707 ap->ctl = ATA_DEVCTL_OBS;
6709 ap->dev = host->dev;
6710 ap->last_ctl = 0xFF;
6712 #if defined(ATA_VERBOSE_DEBUG)
6713 /* turn on all debugging levels */
6714 ap->msg_enable = 0x00FF;
6715 #elif defined(ATA_DEBUG)
6716 ap->msg_enable = ATA_MSG_DRV | ATA_MSG_INFO | ATA_MSG_CTL | ATA_MSG_WARN | ATA_MSG_ERR;
6718 ap->msg_enable = ATA_MSG_DRV | ATA_MSG_ERR | ATA_MSG_WARN;
6721 INIT_DELAYED_WORK(&ap->port_task, NULL);
6722 INIT_DELAYED_WORK(&ap->hotplug_task, ata_scsi_hotplug);
6723 INIT_WORK(&ap->scsi_rescan_task, ata_scsi_dev_rescan);
6724 INIT_LIST_HEAD(&ap->eh_done_q);
6725 init_waitqueue_head(&ap->eh_wait_q);
6726 init_timer_deferrable(&ap->fastdrain_timer);
6727 ap->fastdrain_timer.function = ata_eh_fastdrain_timerfn;
6728 ap->fastdrain_timer.data = (unsigned long)ap;
6730 ap->cbl = ATA_CBL_NONE;
6732 ata_link_init(ap, &ap->link, 0);
6735 ap->stats.unhandled_irq = 1;
6736 ap->stats.idle_irq = 1;
6741 static void ata_host_release(struct device *gendev, void *res)
6743 struct ata_host *host = dev_get_drvdata(gendev);
6746 for (i = 0; i < host->n_ports; i++) {
6747 struct ata_port *ap = host->ports[i];
6753 scsi_host_put(ap->scsi_host);
6755 kfree(ap->pmp_link);
6757 host->ports[i] = NULL;
6760 dev_set_drvdata(gendev, NULL);
6764 * ata_host_alloc - allocate and init basic ATA host resources
6765 * @dev: generic device this host is associated with
6766 * @max_ports: maximum number of ATA ports associated with this host
6768 * Allocate and initialize basic ATA host resources. LLD calls
6769 * this function to allocate a host, initializes it fully and
6770 * attaches it using ata_host_register().
6772 * @max_ports ports are allocated and host->n_ports is
6773 * initialized to @max_ports. The caller is allowed to decrease
6774 * host->n_ports before calling ata_host_register(). The unused
6775 * ports will be automatically freed on registration.
6778 * Allocate ATA host on success, NULL on failure.
6781 * Inherited from calling layer (may sleep).
6783 struct ata_host *ata_host_alloc(struct device *dev, int max_ports)
6785 struct ata_host *host;
6791 if (!devres_open_group(dev, NULL, GFP_KERNEL))
6794 /* alloc a container for our list of ATA ports (buses) */
6795 sz = sizeof(struct ata_host) + (max_ports + 1) * sizeof(void *);
6796 /* alloc a container for our list of ATA ports (buses) */
6797 host = devres_alloc(ata_host_release, sz, GFP_KERNEL);
6801 devres_add(dev, host);
6802 dev_set_drvdata(dev, host);
6804 spin_lock_init(&host->lock);
6806 host->n_ports = max_ports;
6808 /* allocate ports bound to this host */
6809 for (i = 0; i < max_ports; i++) {
6810 struct ata_port *ap;
6812 ap = ata_port_alloc(host);
6817 host->ports[i] = ap;
6820 devres_remove_group(dev, NULL);
6824 devres_release_group(dev, NULL);
6829 * ata_host_alloc_pinfo - alloc host and init with port_info array
6830 * @dev: generic device this host is associated with
6831 * @ppi: array of ATA port_info to initialize host with
6832 * @n_ports: number of ATA ports attached to this host
6834 * Allocate ATA host and initialize with info from @ppi. If NULL
6835 * terminated, @ppi may contain fewer entries than @n_ports. The
6836 * last entry will be used for the remaining ports.
6839 * Allocate ATA host on success, NULL on failure.
6842 * Inherited from calling layer (may sleep).
6844 struct ata_host *ata_host_alloc_pinfo(struct device *dev,
6845 const struct ata_port_info * const * ppi,
6848 const struct ata_port_info *pi;
6849 struct ata_host *host;
6852 host = ata_host_alloc(dev, n_ports);
6856 for (i = 0, j = 0, pi = NULL; i < host->n_ports; i++) {
6857 struct ata_port *ap = host->ports[i];
6862 ap->pio_mask = pi->pio_mask;
6863 ap->mwdma_mask = pi->mwdma_mask;
6864 ap->udma_mask = pi->udma_mask;
6865 ap->flags |= pi->flags;
6866 ap->link.flags |= pi->link_flags;
6867 ap->ops = pi->port_ops;
6869 if (!host->ops && (pi->port_ops != &ata_dummy_port_ops))
6870 host->ops = pi->port_ops;
6871 if (!host->private_data && pi->private_data)
6872 host->private_data = pi->private_data;
6878 static void ata_host_stop(struct device *gendev, void *res)
6880 struct ata_host *host = dev_get_drvdata(gendev);
6883 WARN_ON(!(host->flags & ATA_HOST_STARTED));
6885 for (i = 0; i < host->n_ports; i++) {
6886 struct ata_port *ap = host->ports[i];
6888 if (ap->ops->port_stop)
6889 ap->ops->port_stop(ap);
6892 if (host->ops->host_stop)
6893 host->ops->host_stop(host);
6897 * ata_host_start - start and freeze ports of an ATA host
6898 * @host: ATA host to start ports for
6900 * Start and then freeze ports of @host. Started status is
6901 * recorded in host->flags, so this function can be called
6902 * multiple times. Ports are guaranteed to get started only
6903 * once. If host->ops isn't initialized yet, its set to the
6904 * first non-dummy port ops.
6907 * Inherited from calling layer (may sleep).
6910 * 0 if all ports are started successfully, -errno otherwise.
6912 int ata_host_start(struct ata_host *host)
6915 void *start_dr = NULL;
6918 if (host->flags & ATA_HOST_STARTED)
6921 for (i = 0; i < host->n_ports; i++) {
6922 struct ata_port *ap = host->ports[i];
6924 if (!host->ops && !ata_port_is_dummy(ap))
6925 host->ops = ap->ops;
6927 if (ap->ops->port_stop)
6931 if (host->ops->host_stop)
6935 start_dr = devres_alloc(ata_host_stop, 0, GFP_KERNEL);
6940 for (i = 0; i < host->n_ports; i++) {
6941 struct ata_port *ap = host->ports[i];
6943 if (ap->ops->port_start) {
6944 rc = ap->ops->port_start(ap);
6947 dev_printk(KERN_ERR, host->dev,
6948 "failed to start port %d "
6949 "(errno=%d)\n", i, rc);
6953 ata_eh_freeze_port(ap);
6957 devres_add(host->dev, start_dr);
6958 host->flags |= ATA_HOST_STARTED;
6963 struct ata_port *ap = host->ports[i];
6965 if (ap->ops->port_stop)
6966 ap->ops->port_stop(ap);
6968 devres_free(start_dr);
6973 * ata_sas_host_init - Initialize a host struct
6974 * @host: host to initialize
6975 * @dev: device host is attached to
6976 * @flags: host flags
6980 * PCI/etc. bus probe sem.
6983 /* KILLME - the only user left is ipr */
6984 void ata_host_init(struct ata_host *host, struct device *dev,
6985 unsigned long flags, const struct ata_port_operations *ops)
6987 spin_lock_init(&host->lock);
6989 host->flags = flags;
6994 * ata_host_register - register initialized ATA host
6995 * @host: ATA host to register
6996 * @sht: template for SCSI host
6998 * Register initialized ATA host. @host is allocated using
6999 * ata_host_alloc() and fully initialized by LLD. This function
7000 * starts ports, registers @host with ATA and SCSI layers and
7001 * probe registered devices.
7004 * Inherited from calling layer (may sleep).
7007 * 0 on success, -errno otherwise.
7009 int ata_host_register(struct ata_host *host, struct scsi_host_template *sht)
7013 /* host must have been started */
7014 if (!(host->flags & ATA_HOST_STARTED)) {
7015 dev_printk(KERN_ERR, host->dev,
7016 "BUG: trying to register unstarted host\n");
7021 /* Blow away unused ports. This happens when LLD can't
7022 * determine the exact number of ports to allocate at
7025 for (i = host->n_ports; host->ports[i]; i++)
7026 kfree(host->ports[i]);
7028 /* give ports names and add SCSI hosts */
7029 for (i = 0; i < host->n_ports; i++)
7030 host->ports[i]->print_id = ata_print_id++;
7032 rc = ata_scsi_add_hosts(host, sht);
7036 /* associate with ACPI nodes */
7037 ata_acpi_associate(host);
7039 /* set cable, sata_spd_limit and report */
7040 for (i = 0; i < host->n_ports; i++) {
7041 struct ata_port *ap = host->ports[i];
7042 unsigned long xfer_mask;
7044 /* set SATA cable type if still unset */
7045 if (ap->cbl == ATA_CBL_NONE && (ap->flags & ATA_FLAG_SATA))
7046 ap->cbl = ATA_CBL_SATA;
7048 /* init sata_spd_limit to the current value */
7049 sata_link_init_spd(&ap->link);
7051 /* print per-port info to dmesg */
7052 xfer_mask = ata_pack_xfermask(ap->pio_mask, ap->mwdma_mask,
7055 if (!ata_port_is_dummy(ap)) {
7056 ata_port_printk(ap, KERN_INFO,
7057 "%cATA max %s %s\n",
7058 (ap->flags & ATA_FLAG_SATA) ? 'S' : 'P',
7059 ata_mode_string(xfer_mask),
7060 ap->link.eh_info.desc);
7061 ata_ehi_clear_desc(&ap->link.eh_info);
7063 ata_port_printk(ap, KERN_INFO, "DUMMY\n");
7066 /* perform each probe synchronously */
7067 DPRINTK("probe begin\n");
7068 for (i = 0; i < host->n_ports; i++) {
7069 struct ata_port *ap = host->ports[i];
7073 if (ap->ops->error_handler) {
7074 struct ata_eh_info *ehi = &ap->link.eh_info;
7075 unsigned long flags;
7079 /* kick EH for boot probing */
7080 spin_lock_irqsave(ap->lock, flags);
7083 (1 << ata_link_max_devices(&ap->link)) - 1;
7084 ehi->action |= ATA_EH_SOFTRESET;
7085 ehi->flags |= ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET;
7087 ap->pflags &= ~ATA_PFLAG_INITIALIZING;
7088 ap->pflags |= ATA_PFLAG_LOADING;
7089 ata_port_schedule_eh(ap);
7091 spin_unlock_irqrestore(ap->lock, flags);
7093 /* wait for EH to finish */
7094 ata_port_wait_eh(ap);
7096 DPRINTK("ata%u: bus probe begin\n", ap->print_id);
7097 rc = ata_bus_probe(ap);
7098 DPRINTK("ata%u: bus probe end\n", ap->print_id);
7101 /* FIXME: do something useful here?
7102 * Current libata behavior will
7103 * tear down everything when
7104 * the module is removed
7105 * or the h/w is unplugged.
7111 /* probes are done, now scan each port's disk(s) */
7112 DPRINTK("host probe begin\n");
7113 for (i = 0; i < host->n_ports; i++) {
7114 struct ata_port *ap = host->ports[i];
7116 ata_scsi_scan_host(ap, 1);
7117 ata_lpm_schedule(ap, ap->pm_policy);
7124 * ata_host_activate - start host, request IRQ and register it
7125 * @host: target ATA host
7126 * @irq: IRQ to request
7127 * @irq_handler: irq_handler used when requesting IRQ
7128 * @irq_flags: irq_flags used when requesting IRQ
7129 * @sht: scsi_host_template to use when registering the host
7131 * After allocating an ATA host and initializing it, most libata
7132 * LLDs perform three steps to activate the host - start host,
7133 * request IRQ and register it. This helper takes necessasry
7134 * arguments and performs the three steps in one go.
7136 * An invalid IRQ skips the IRQ registration and expects the host to
7137 * have set polling mode on the port. In this case, @irq_handler
7141 * Inherited from calling layer (may sleep).
7144 * 0 on success, -errno otherwise.
7146 int ata_host_activate(struct ata_host *host, int irq,
7147 irq_handler_t irq_handler, unsigned long irq_flags,
7148 struct scsi_host_template *sht)
7152 rc = ata_host_start(host);
7156 /* Special case for polling mode */
7158 WARN_ON(irq_handler);
7159 return ata_host_register(host, sht);
7162 rc = devm_request_irq(host->dev, irq, irq_handler, irq_flags,
7163 dev_driver_string(host->dev), host);
7167 for (i = 0; i < host->n_ports; i++)
7168 ata_port_desc(host->ports[i], "irq %d", irq);
7170 rc = ata_host_register(host, sht);
7171 /* if failed, just free the IRQ and leave ports alone */
7173 devm_free_irq(host->dev, irq, host);
7179 * ata_port_detach - Detach ATA port in prepration of device removal
7180 * @ap: ATA port to be detached
7182 * Detach all ATA devices and the associated SCSI devices of @ap;
7183 * then, remove the associated SCSI host. @ap is guaranteed to
7184 * be quiescent on return from this function.
7187 * Kernel thread context (may sleep).
7189 static void ata_port_detach(struct ata_port *ap)
7191 unsigned long flags;
7192 struct ata_link *link;
7193 struct ata_device *dev;
7195 if (!ap->ops->error_handler)
7198 /* tell EH we're leaving & flush EH */
7199 spin_lock_irqsave(ap->lock, flags);
7200 ap->pflags |= ATA_PFLAG_UNLOADING;
7201 spin_unlock_irqrestore(ap->lock, flags);
7203 ata_port_wait_eh(ap);
7205 /* EH is now guaranteed to see UNLOADING - EH context belongs
7206 * to us. Disable all existing devices.
7208 ata_port_for_each_link(link, ap) {
7209 ata_link_for_each_dev(dev, link)
7210 ata_dev_disable(dev);
7213 /* Final freeze & EH. All in-flight commands are aborted. EH
7214 * will be skipped and retrials will be terminated with bad
7217 spin_lock_irqsave(ap->lock, flags);
7218 ata_port_freeze(ap); /* won't be thawed */
7219 spin_unlock_irqrestore(ap->lock, flags);
7221 ata_port_wait_eh(ap);
7222 cancel_rearming_delayed_work(&ap->hotplug_task);
7225 /* remove the associated SCSI host */
7226 scsi_remove_host(ap->scsi_host);
7230 * ata_host_detach - Detach all ports of an ATA host
7231 * @host: Host to detach
7233 * Detach all ports of @host.
7236 * Kernel thread context (may sleep).
7238 void ata_host_detach(struct ata_host *host)
7242 for (i = 0; i < host->n_ports; i++)
7243 ata_port_detach(host->ports[i]);
7245 /* the host is dead now, dissociate ACPI */
7246 ata_acpi_dissociate(host);
7250 * ata_std_ports - initialize ioaddr with standard port offsets.
7251 * @ioaddr: IO address structure to be initialized
7253 * Utility function which initializes data_addr, error_addr,
7254 * feature_addr, nsect_addr, lbal_addr, lbam_addr, lbah_addr,
7255 * device_addr, status_addr, and command_addr to standard offsets
7256 * relative to cmd_addr.
7258 * Does not set ctl_addr, altstatus_addr, bmdma_addr, or scr_addr.
7261 void ata_std_ports(struct ata_ioports *ioaddr)
7263 ioaddr->data_addr = ioaddr->cmd_addr + ATA_REG_DATA;
7264 ioaddr->error_addr = ioaddr->cmd_addr + ATA_REG_ERR;
7265 ioaddr->feature_addr = ioaddr->cmd_addr + ATA_REG_FEATURE;
7266 ioaddr->nsect_addr = ioaddr->cmd_addr + ATA_REG_NSECT;
7267 ioaddr->lbal_addr = ioaddr->cmd_addr + ATA_REG_LBAL;
7268 ioaddr->lbam_addr = ioaddr->cmd_addr + ATA_REG_LBAM;
7269 ioaddr->lbah_addr = ioaddr->cmd_addr + ATA_REG_LBAH;
7270 ioaddr->device_addr = ioaddr->cmd_addr + ATA_REG_DEVICE;
7271 ioaddr->status_addr = ioaddr->cmd_addr + ATA_REG_STATUS;
7272 ioaddr->command_addr = ioaddr->cmd_addr + ATA_REG_CMD;
7279 * ata_pci_remove_one - PCI layer callback for device removal
7280 * @pdev: PCI device that was removed
7282 * PCI layer indicates to libata via this hook that hot-unplug or
7283 * module unload event has occurred. Detach all ports. Resource
7284 * release is handled via devres.
7287 * Inherited from PCI layer (may sleep).
7289 void ata_pci_remove_one(struct pci_dev *pdev)
7291 struct device *dev = &pdev->dev;
7292 struct ata_host *host = dev_get_drvdata(dev);
7294 ata_host_detach(host);
7297 /* move to PCI subsystem */
7298 int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits)
7300 unsigned long tmp = 0;
7302 switch (bits->width) {
7305 pci_read_config_byte(pdev, bits->reg, &tmp8);
7311 pci_read_config_word(pdev, bits->reg, &tmp16);
7317 pci_read_config_dword(pdev, bits->reg, &tmp32);
7328 return (tmp == bits->val) ? 1 : 0;
7332 void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg)
7334 pci_save_state(pdev);
7335 pci_disable_device(pdev);
7337 if (mesg.event == PM_EVENT_SUSPEND)
7338 pci_set_power_state(pdev, PCI_D3hot);
7341 int ata_pci_device_do_resume(struct pci_dev *pdev)
7345 pci_set_power_state(pdev, PCI_D0);
7346 pci_restore_state(pdev);
7348 rc = pcim_enable_device(pdev);
7350 dev_printk(KERN_ERR, &pdev->dev,
7351 "failed to enable device after resume (%d)\n", rc);
7355 pci_set_master(pdev);
7359 int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg)
7361 struct ata_host *host = dev_get_drvdata(&pdev->dev);
7364 rc = ata_host_suspend(host, mesg);
7368 ata_pci_device_do_suspend(pdev, mesg);
7373 int ata_pci_device_resume(struct pci_dev *pdev)
7375 struct ata_host *host = dev_get_drvdata(&pdev->dev);
7378 rc = ata_pci_device_do_resume(pdev);
7380 ata_host_resume(host);
7383 #endif /* CONFIG_PM */
7385 #endif /* CONFIG_PCI */
7388 static int __init ata_init(void)
7390 ata_probe_timeout *= HZ;
7391 ata_wq = create_workqueue("ata");
7395 ata_aux_wq = create_singlethread_workqueue("ata_aux");
7397 destroy_workqueue(ata_wq);
7401 printk(KERN_DEBUG "libata version " DRV_VERSION " loaded.\n");
7405 static void __exit ata_exit(void)
7407 destroy_workqueue(ata_wq);
7408 destroy_workqueue(ata_aux_wq);
7411 subsys_initcall(ata_init);
7412 module_exit(ata_exit);
7414 static unsigned long ratelimit_time;
7415 static DEFINE_SPINLOCK(ata_ratelimit_lock);
7417 int ata_ratelimit(void)
7420 unsigned long flags;
7422 spin_lock_irqsave(&ata_ratelimit_lock, flags);
7424 if (time_after(jiffies, ratelimit_time)) {
7426 ratelimit_time = jiffies + (HZ/5);
7430 spin_unlock_irqrestore(&ata_ratelimit_lock, flags);
7436 * ata_wait_register - wait until register value changes
7437 * @reg: IO-mapped register
7438 * @mask: Mask to apply to read register value
7439 * @val: Wait condition
7440 * @interval_msec: polling interval in milliseconds
7441 * @timeout_msec: timeout in milliseconds
7443 * Waiting for some bits of register to change is a common
7444 * operation for ATA controllers. This function reads 32bit LE
7445 * IO-mapped register @reg and tests for the following condition.
7447 * (*@reg & mask) != val
7449 * If the condition is met, it returns; otherwise, the process is
7450 * repeated after @interval_msec until timeout.
7453 * Kernel thread context (may sleep)
7456 * The final register value.
7458 u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val,
7459 unsigned long interval_msec,
7460 unsigned long timeout_msec)
7462 unsigned long timeout;
7465 tmp = ioread32(reg);
7467 /* Calculate timeout _after_ the first read to make sure
7468 * preceding writes reach the controller before starting to
7469 * eat away the timeout.
7471 timeout = jiffies + (timeout_msec * HZ) / 1000;
7473 while ((tmp & mask) == val && time_before(jiffies, timeout)) {
7474 msleep(interval_msec);
7475 tmp = ioread32(reg);
7484 static void ata_dummy_noret(struct ata_port *ap) { }
7485 static int ata_dummy_ret0(struct ata_port *ap) { return 0; }
7486 static void ata_dummy_qc_noret(struct ata_queued_cmd *qc) { }
7488 static u8 ata_dummy_check_status(struct ata_port *ap)
7493 static unsigned int ata_dummy_qc_issue(struct ata_queued_cmd *qc)
7495 return AC_ERR_SYSTEM;
7498 const struct ata_port_operations ata_dummy_port_ops = {
7499 .check_status = ata_dummy_check_status,
7500 .check_altstatus = ata_dummy_check_status,
7501 .dev_select = ata_noop_dev_select,
7502 .qc_prep = ata_noop_qc_prep,
7503 .qc_issue = ata_dummy_qc_issue,
7504 .freeze = ata_dummy_noret,
7505 .thaw = ata_dummy_noret,
7506 .error_handler = ata_dummy_noret,
7507 .post_internal_cmd = ata_dummy_qc_noret,
7508 .irq_clear = ata_dummy_noret,
7509 .port_start = ata_dummy_ret0,
7510 .port_stop = ata_dummy_noret,
7513 const struct ata_port_info ata_dummy_port_info = {
7514 .port_ops = &ata_dummy_port_ops,
7518 * libata is essentially a library of internal helper functions for
7519 * low-level ATA host controller drivers. As such, the API/ABI is
7520 * likely to change as new drivers are added and updated.
7521 * Do not depend on ABI/API stability.
7523 EXPORT_SYMBOL_GPL(sata_deb_timing_normal);
7524 EXPORT_SYMBOL_GPL(sata_deb_timing_hotplug);
7525 EXPORT_SYMBOL_GPL(sata_deb_timing_long);
7526 EXPORT_SYMBOL_GPL(ata_dummy_port_ops);
7527 EXPORT_SYMBOL_GPL(ata_dummy_port_info);
7528 EXPORT_SYMBOL_GPL(ata_std_bios_param);
7529 EXPORT_SYMBOL_GPL(ata_std_ports);
7530 EXPORT_SYMBOL_GPL(ata_host_init);
7531 EXPORT_SYMBOL_GPL(ata_host_alloc);
7532 EXPORT_SYMBOL_GPL(ata_host_alloc_pinfo);
7533 EXPORT_SYMBOL_GPL(ata_host_start);
7534 EXPORT_SYMBOL_GPL(ata_host_register);
7535 EXPORT_SYMBOL_GPL(ata_host_activate);
7536 EXPORT_SYMBOL_GPL(ata_host_detach);
7537 EXPORT_SYMBOL_GPL(ata_sg_init);
7538 EXPORT_SYMBOL_GPL(ata_hsm_move);
7539 EXPORT_SYMBOL_GPL(ata_qc_complete);
7540 EXPORT_SYMBOL_GPL(ata_qc_complete_multiple);
7541 EXPORT_SYMBOL_GPL(ata_qc_issue_prot);
7542 EXPORT_SYMBOL_GPL(ata_tf_load);
7543 EXPORT_SYMBOL_GPL(ata_tf_read);
7544 EXPORT_SYMBOL_GPL(ata_noop_dev_select);
7545 EXPORT_SYMBOL_GPL(ata_std_dev_select);
7546 EXPORT_SYMBOL_GPL(sata_print_link_status);
7547 EXPORT_SYMBOL_GPL(ata_tf_to_fis);
7548 EXPORT_SYMBOL_GPL(ata_tf_from_fis);
7549 EXPORT_SYMBOL_GPL(ata_pack_xfermask);
7550 EXPORT_SYMBOL_GPL(ata_unpack_xfermask);
7551 EXPORT_SYMBOL_GPL(ata_xfer_mask2mode);
7552 EXPORT_SYMBOL_GPL(ata_xfer_mode2mask);
7553 EXPORT_SYMBOL_GPL(ata_xfer_mode2shift);
7554 EXPORT_SYMBOL_GPL(ata_mode_string);
7555 EXPORT_SYMBOL_GPL(ata_id_xfermask);
7556 EXPORT_SYMBOL_GPL(ata_check_status);
7557 EXPORT_SYMBOL_GPL(ata_altstatus);
7558 EXPORT_SYMBOL_GPL(ata_exec_command);
7559 EXPORT_SYMBOL_GPL(ata_port_start);
7560 EXPORT_SYMBOL_GPL(ata_sff_port_start);
7561 EXPORT_SYMBOL_GPL(ata_interrupt);
7562 EXPORT_SYMBOL_GPL(ata_do_set_mode);
7563 EXPORT_SYMBOL_GPL(ata_data_xfer);
7564 EXPORT_SYMBOL_GPL(ata_data_xfer_noirq);
7565 EXPORT_SYMBOL_GPL(ata_std_qc_defer);
7566 EXPORT_SYMBOL_GPL(ata_qc_prep);
7567 EXPORT_SYMBOL_GPL(ata_dumb_qc_prep);
7568 EXPORT_SYMBOL_GPL(ata_noop_qc_prep);
7569 EXPORT_SYMBOL_GPL(ata_bmdma_setup);
7570 EXPORT_SYMBOL_GPL(ata_bmdma_start);
7571 EXPORT_SYMBOL_GPL(ata_bmdma_irq_clear);
7572 EXPORT_SYMBOL_GPL(ata_bmdma_status);
7573 EXPORT_SYMBOL_GPL(ata_bmdma_stop);
7574 EXPORT_SYMBOL_GPL(ata_bmdma_freeze);
7575 EXPORT_SYMBOL_GPL(ata_bmdma_thaw);
7576 EXPORT_SYMBOL_GPL(ata_bmdma_drive_eh);
7577 EXPORT_SYMBOL_GPL(ata_bmdma_error_handler);
7578 EXPORT_SYMBOL_GPL(ata_bmdma_post_internal_cmd);
7579 EXPORT_SYMBOL_GPL(ata_port_probe);
7580 EXPORT_SYMBOL_GPL(ata_dev_disable);
7581 EXPORT_SYMBOL_GPL(sata_set_spd);
7582 EXPORT_SYMBOL_GPL(sata_link_debounce);
7583 EXPORT_SYMBOL_GPL(sata_link_resume);
7584 EXPORT_SYMBOL_GPL(ata_bus_reset);
7585 EXPORT_SYMBOL_GPL(ata_std_prereset);
7586 EXPORT_SYMBOL_GPL(ata_std_softreset);
7587 EXPORT_SYMBOL_GPL(sata_link_hardreset);
7588 EXPORT_SYMBOL_GPL(sata_std_hardreset);
7589 EXPORT_SYMBOL_GPL(ata_std_postreset);
7590 EXPORT_SYMBOL_GPL(ata_dev_classify);
7591 EXPORT_SYMBOL_GPL(ata_dev_pair);
7592 EXPORT_SYMBOL_GPL(ata_port_disable);
7593 EXPORT_SYMBOL_GPL(ata_ratelimit);
7594 EXPORT_SYMBOL_GPL(ata_wait_register);
7595 EXPORT_SYMBOL_GPL(ata_busy_sleep);
7596 EXPORT_SYMBOL_GPL(ata_wait_after_reset);
7597 EXPORT_SYMBOL_GPL(ata_wait_ready);
7598 EXPORT_SYMBOL_GPL(ata_port_queue_task);
7599 EXPORT_SYMBOL_GPL(ata_scsi_ioctl);
7600 EXPORT_SYMBOL_GPL(ata_scsi_queuecmd);
7601 EXPORT_SYMBOL_GPL(ata_scsi_slave_config);
7602 EXPORT_SYMBOL_GPL(ata_scsi_slave_destroy);
7603 EXPORT_SYMBOL_GPL(ata_scsi_change_queue_depth);
7604 EXPORT_SYMBOL_GPL(ata_host_intr);
7605 EXPORT_SYMBOL_GPL(sata_scr_valid);
7606 EXPORT_SYMBOL_GPL(sata_scr_read);
7607 EXPORT_SYMBOL_GPL(sata_scr_write);
7608 EXPORT_SYMBOL_GPL(sata_scr_write_flush);
7609 EXPORT_SYMBOL_GPL(ata_link_online);
7610 EXPORT_SYMBOL_GPL(ata_link_offline);
7612 EXPORT_SYMBOL_GPL(ata_host_suspend);
7613 EXPORT_SYMBOL_GPL(ata_host_resume);
7614 #endif /* CONFIG_PM */
7615 EXPORT_SYMBOL_GPL(ata_id_string);
7616 EXPORT_SYMBOL_GPL(ata_id_c_string);
7617 EXPORT_SYMBOL_GPL(ata_scsi_simulate);
7619 EXPORT_SYMBOL_GPL(ata_pio_need_iordy);
7620 EXPORT_SYMBOL_GPL(ata_timing_find_mode);
7621 EXPORT_SYMBOL_GPL(ata_timing_compute);
7622 EXPORT_SYMBOL_GPL(ata_timing_merge);
7623 EXPORT_SYMBOL_GPL(ata_timing_cycle2mode);
7626 EXPORT_SYMBOL_GPL(pci_test_config_bits);
7627 EXPORT_SYMBOL_GPL(ata_pci_init_sff_host);
7628 EXPORT_SYMBOL_GPL(ata_pci_init_bmdma);
7629 EXPORT_SYMBOL_GPL(ata_pci_prepare_sff_host);
7630 EXPORT_SYMBOL_GPL(ata_pci_init_one);
7631 EXPORT_SYMBOL_GPL(ata_pci_remove_one);
7633 EXPORT_SYMBOL_GPL(ata_pci_device_do_suspend);
7634 EXPORT_SYMBOL_GPL(ata_pci_device_do_resume);
7635 EXPORT_SYMBOL_GPL(ata_pci_device_suspend);
7636 EXPORT_SYMBOL_GPL(ata_pci_device_resume);
7637 #endif /* CONFIG_PM */
7638 EXPORT_SYMBOL_GPL(ata_pci_default_filter);
7639 EXPORT_SYMBOL_GPL(ata_pci_clear_simplex);
7640 #endif /* CONFIG_PCI */
7642 EXPORT_SYMBOL_GPL(sata_pmp_qc_defer_cmd_switch);
7643 EXPORT_SYMBOL_GPL(sata_pmp_std_prereset);
7644 EXPORT_SYMBOL_GPL(sata_pmp_std_hardreset);
7645 EXPORT_SYMBOL_GPL(sata_pmp_std_postreset);
7646 EXPORT_SYMBOL_GPL(sata_pmp_do_eh);
7648 EXPORT_SYMBOL_GPL(__ata_ehi_push_desc);
7649 EXPORT_SYMBOL_GPL(ata_ehi_push_desc);
7650 EXPORT_SYMBOL_GPL(ata_ehi_clear_desc);
7651 EXPORT_SYMBOL_GPL(ata_port_desc);
7653 EXPORT_SYMBOL_GPL(ata_port_pbar_desc);
7654 #endif /* CONFIG_PCI */
7655 EXPORT_SYMBOL_GPL(ata_port_schedule_eh);
7656 EXPORT_SYMBOL_GPL(ata_link_abort);
7657 EXPORT_SYMBOL_GPL(ata_port_abort);
7658 EXPORT_SYMBOL_GPL(ata_port_freeze);
7659 EXPORT_SYMBOL_GPL(sata_async_notification);
7660 EXPORT_SYMBOL_GPL(ata_eh_freeze_port);
7661 EXPORT_SYMBOL_GPL(ata_eh_thaw_port);
7662 EXPORT_SYMBOL_GPL(ata_eh_qc_complete);
7663 EXPORT_SYMBOL_GPL(ata_eh_qc_retry);
7664 EXPORT_SYMBOL_GPL(ata_do_eh);
7665 EXPORT_SYMBOL_GPL(ata_irq_on);
7666 EXPORT_SYMBOL_GPL(ata_dev_try_classify);
7668 EXPORT_SYMBOL_GPL(ata_cable_40wire);
7669 EXPORT_SYMBOL_GPL(ata_cable_80wire);
7670 EXPORT_SYMBOL_GPL(ata_cable_unknown);
7671 EXPORT_SYMBOL_GPL(ata_cable_ignore);
7672 EXPORT_SYMBOL_GPL(ata_cable_sata);