2 * libata-core.c - helper library for ATA
4 * Maintained by: Jeff Garzik <jgarzik@pobox.com>
5 * Please ALWAYS copy linux-ide@vger.kernel.org
8 * Copyright 2003-2004 Red Hat, Inc. All rights reserved.
9 * Copyright 2003-2004 Jeff Garzik
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2, or (at your option)
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; see the file COPYING. If not, write to
24 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
27 * libata documentation is available via 'make {ps|pdf}docs',
28 * as Documentation/DocBook/libata.*
30 * Hardware documentation available from http://www.t13.org/ and
31 * http://www.sata-io.org/
33 * Standards documents from:
34 * http://www.t13.org (ATA standards, PCI DMA IDE spec)
35 * http://www.t10.org (SCSI MMC - for ATAPI MMC)
36 * http://www.sata-io.org (SATA)
37 * http://www.compactflash.org (CF)
38 * http://www.qic.org (QIC157 - Tape and DSC)
39 * http://www.ce-ata.org (CE-ATA: not supported)
43 #include <linux/kernel.h>
44 #include <linux/module.h>
45 #include <linux/pci.h>
46 #include <linux/init.h>
47 #include <linux/list.h>
49 #include <linux/highmem.h>
50 #include <linux/spinlock.h>
51 #include <linux/blkdev.h>
52 #include <linux/delay.h>
53 #include <linux/timer.h>
54 #include <linux/interrupt.h>
55 #include <linux/completion.h>
56 #include <linux/suspend.h>
57 #include <linux/workqueue.h>
58 #include <linux/jiffies.h>
59 #include <linux/scatterlist.h>
61 #include <scsi/scsi.h>
62 #include <scsi/scsi_cmnd.h>
63 #include <scsi/scsi_host.h>
64 #include <linux/libata.h>
65 #include <asm/semaphore.h>
66 #include <asm/byteorder.h>
67 #include <linux/cdrom.h>
72 /* debounce timing parameters in msecs { interval, duration, timeout } */
73 const unsigned long sata_deb_timing_normal[] = { 5, 100, 2000 };
74 const unsigned long sata_deb_timing_hotplug[] = { 25, 500, 2000 };
75 const unsigned long sata_deb_timing_long[] = { 100, 2000, 5000 };
77 static unsigned int ata_dev_init_params(struct ata_device *dev,
78 u16 heads, u16 sectors);
79 static unsigned int ata_dev_set_xfermode(struct ata_device *dev);
80 static unsigned int ata_dev_set_feature(struct ata_device *dev,
81 u8 enable, u8 feature);
82 static void ata_dev_xfermask(struct ata_device *dev);
83 static unsigned long ata_dev_blacklisted(const struct ata_device *dev);
85 unsigned int ata_print_id = 1;
86 static struct workqueue_struct *ata_wq;
88 struct workqueue_struct *ata_aux_wq;
90 int atapi_enabled = 1;
91 module_param(atapi_enabled, int, 0444);
92 MODULE_PARM_DESC(atapi_enabled, "Enable discovery of ATAPI devices (0=off, 1=on)");
95 module_param(atapi_dmadir, int, 0444);
96 MODULE_PARM_DESC(atapi_dmadir, "Enable ATAPI DMADIR bridge support (0=off, 1=on)");
98 int atapi_passthru16 = 1;
99 module_param(atapi_passthru16, int, 0444);
100 MODULE_PARM_DESC(atapi_passthru16, "Enable ATA_16 passthru for ATAPI devices; on by default (0=off, 1=on)");
103 module_param_named(fua, libata_fua, int, 0444);
104 MODULE_PARM_DESC(fua, "FUA support (0=off, 1=on)");
106 static int ata_ignore_hpa;
107 module_param_named(ignore_hpa, ata_ignore_hpa, int, 0644);
108 MODULE_PARM_DESC(ignore_hpa, "Ignore HPA limit (0=keep BIOS limits, 1=ignore limits, using full disk)");
110 static int libata_dma_mask = ATA_DMA_MASK_ATA|ATA_DMA_MASK_ATAPI|ATA_DMA_MASK_CFA;
111 module_param_named(dma, libata_dma_mask, int, 0444);
112 MODULE_PARM_DESC(dma, "DMA enable/disable (0x1==ATA, 0x2==ATAPI, 0x4==CF)");
114 static int ata_probe_timeout = ATA_TMOUT_INTERNAL / HZ;
115 module_param(ata_probe_timeout, int, 0444);
116 MODULE_PARM_DESC(ata_probe_timeout, "Set ATA probing timeout (seconds)");
118 int libata_noacpi = 0;
119 module_param_named(noacpi, libata_noacpi, int, 0444);
120 MODULE_PARM_DESC(noacpi, "Disables the use of ACPI in probe/suspend/resume when set");
122 int libata_allow_tpm = 0;
123 module_param_named(allow_tpm, libata_allow_tpm, int, 0444);
124 MODULE_PARM_DESC(allow_tpm, "Permit the use of TPM commands");
126 MODULE_AUTHOR("Jeff Garzik");
127 MODULE_DESCRIPTION("Library module for ATA devices");
128 MODULE_LICENSE("GPL");
129 MODULE_VERSION(DRV_VERSION);
133 * ata_tf_to_fis - Convert ATA taskfile to SATA FIS structure
134 * @tf: Taskfile to convert
135 * @pmp: Port multiplier port
136 * @is_cmd: This FIS is for command
137 * @fis: Buffer into which data will output
139 * Converts a standard ATA taskfile to a Serial ATA
140 * FIS structure (Register - Host to Device).
143 * Inherited from caller.
145 void ata_tf_to_fis(const struct ata_taskfile *tf, u8 pmp, int is_cmd, u8 *fis)
147 fis[0] = 0x27; /* Register - Host to Device FIS */
148 fis[1] = pmp & 0xf; /* Port multiplier number*/
150 fis[1] |= (1 << 7); /* bit 7 indicates Command FIS */
152 fis[2] = tf->command;
153 fis[3] = tf->feature;
160 fis[8] = tf->hob_lbal;
161 fis[9] = tf->hob_lbam;
162 fis[10] = tf->hob_lbah;
163 fis[11] = tf->hob_feature;
166 fis[13] = tf->hob_nsect;
177 * ata_tf_from_fis - Convert SATA FIS to ATA taskfile
178 * @fis: Buffer from which data will be input
179 * @tf: Taskfile to output
181 * Converts a serial ATA FIS structure to a standard ATA taskfile.
184 * Inherited from caller.
187 void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf)
189 tf->command = fis[2]; /* status */
190 tf->feature = fis[3]; /* error */
197 tf->hob_lbal = fis[8];
198 tf->hob_lbam = fis[9];
199 tf->hob_lbah = fis[10];
202 tf->hob_nsect = fis[13];
205 static const u8 ata_rw_cmds[] = {
209 ATA_CMD_READ_MULTI_EXT,
210 ATA_CMD_WRITE_MULTI_EXT,
214 ATA_CMD_WRITE_MULTI_FUA_EXT,
218 ATA_CMD_PIO_READ_EXT,
219 ATA_CMD_PIO_WRITE_EXT,
232 ATA_CMD_WRITE_FUA_EXT
236 * ata_rwcmd_protocol - set taskfile r/w commands and protocol
237 * @tf: command to examine and configure
238 * @dev: device tf belongs to
240 * Examine the device configuration and tf->flags to calculate
241 * the proper read/write commands and protocol to use.
246 static int ata_rwcmd_protocol(struct ata_taskfile *tf, struct ata_device *dev)
250 int index, fua, lba48, write;
252 fua = (tf->flags & ATA_TFLAG_FUA) ? 4 : 0;
253 lba48 = (tf->flags & ATA_TFLAG_LBA48) ? 2 : 0;
254 write = (tf->flags & ATA_TFLAG_WRITE) ? 1 : 0;
256 if (dev->flags & ATA_DFLAG_PIO) {
257 tf->protocol = ATA_PROT_PIO;
258 index = dev->multi_count ? 0 : 8;
259 } else if (lba48 && (dev->link->ap->flags & ATA_FLAG_PIO_LBA48)) {
260 /* Unable to use DMA due to host limitation */
261 tf->protocol = ATA_PROT_PIO;
262 index = dev->multi_count ? 0 : 8;
264 tf->protocol = ATA_PROT_DMA;
268 cmd = ata_rw_cmds[index + fua + lba48 + write];
277 * ata_tf_read_block - Read block address from ATA taskfile
278 * @tf: ATA taskfile of interest
279 * @dev: ATA device @tf belongs to
284 * Read block address from @tf. This function can handle all
285 * three address formats - LBA, LBA48 and CHS. tf->protocol and
286 * flags select the address format to use.
289 * Block address read from @tf.
291 u64 ata_tf_read_block(struct ata_taskfile *tf, struct ata_device *dev)
295 if (tf->flags & ATA_TFLAG_LBA) {
296 if (tf->flags & ATA_TFLAG_LBA48) {
297 block |= (u64)tf->hob_lbah << 40;
298 block |= (u64)tf->hob_lbam << 32;
299 block |= tf->hob_lbal << 24;
301 block |= (tf->device & 0xf) << 24;
303 block |= tf->lbah << 16;
304 block |= tf->lbam << 8;
309 cyl = tf->lbam | (tf->lbah << 8);
310 head = tf->device & 0xf;
313 block = (cyl * dev->heads + head) * dev->sectors + sect;
320 * ata_build_rw_tf - Build ATA taskfile for given read/write request
321 * @tf: Target ATA taskfile
322 * @dev: ATA device @tf belongs to
323 * @block: Block address
324 * @n_block: Number of blocks
325 * @tf_flags: RW/FUA etc...
331 * Build ATA taskfile @tf for read/write request described by
332 * @block, @n_block, @tf_flags and @tag on @dev.
336 * 0 on success, -ERANGE if the request is too large for @dev,
337 * -EINVAL if the request is invalid.
339 int ata_build_rw_tf(struct ata_taskfile *tf, struct ata_device *dev,
340 u64 block, u32 n_block, unsigned int tf_flags,
343 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
344 tf->flags |= tf_flags;
346 if (ata_ncq_enabled(dev) && likely(tag != ATA_TAG_INTERNAL)) {
348 if (!lba_48_ok(block, n_block))
351 tf->protocol = ATA_PROT_NCQ;
352 tf->flags |= ATA_TFLAG_LBA | ATA_TFLAG_LBA48;
354 if (tf->flags & ATA_TFLAG_WRITE)
355 tf->command = ATA_CMD_FPDMA_WRITE;
357 tf->command = ATA_CMD_FPDMA_READ;
359 tf->nsect = tag << 3;
360 tf->hob_feature = (n_block >> 8) & 0xff;
361 tf->feature = n_block & 0xff;
363 tf->hob_lbah = (block >> 40) & 0xff;
364 tf->hob_lbam = (block >> 32) & 0xff;
365 tf->hob_lbal = (block >> 24) & 0xff;
366 tf->lbah = (block >> 16) & 0xff;
367 tf->lbam = (block >> 8) & 0xff;
368 tf->lbal = block & 0xff;
371 if (tf->flags & ATA_TFLAG_FUA)
372 tf->device |= 1 << 7;
373 } else if (dev->flags & ATA_DFLAG_LBA) {
374 tf->flags |= ATA_TFLAG_LBA;
376 if (lba_28_ok(block, n_block)) {
378 tf->device |= (block >> 24) & 0xf;
379 } else if (lba_48_ok(block, n_block)) {
380 if (!(dev->flags & ATA_DFLAG_LBA48))
384 tf->flags |= ATA_TFLAG_LBA48;
386 tf->hob_nsect = (n_block >> 8) & 0xff;
388 tf->hob_lbah = (block >> 40) & 0xff;
389 tf->hob_lbam = (block >> 32) & 0xff;
390 tf->hob_lbal = (block >> 24) & 0xff;
392 /* request too large even for LBA48 */
395 if (unlikely(ata_rwcmd_protocol(tf, dev) < 0))
398 tf->nsect = n_block & 0xff;
400 tf->lbah = (block >> 16) & 0xff;
401 tf->lbam = (block >> 8) & 0xff;
402 tf->lbal = block & 0xff;
404 tf->device |= ATA_LBA;
407 u32 sect, head, cyl, track;
409 /* The request -may- be too large for CHS addressing. */
410 if (!lba_28_ok(block, n_block))
413 if (unlikely(ata_rwcmd_protocol(tf, dev) < 0))
416 /* Convert LBA to CHS */
417 track = (u32)block / dev->sectors;
418 cyl = track / dev->heads;
419 head = track % dev->heads;
420 sect = (u32)block % dev->sectors + 1;
422 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
423 (u32)block, track, cyl, head, sect);
425 /* Check whether the converted CHS can fit.
429 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
432 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
443 * ata_pack_xfermask - Pack pio, mwdma and udma masks into xfer_mask
444 * @pio_mask: pio_mask
445 * @mwdma_mask: mwdma_mask
446 * @udma_mask: udma_mask
448 * Pack @pio_mask, @mwdma_mask and @udma_mask into a single
449 * unsigned int xfer_mask.
457 unsigned long ata_pack_xfermask(unsigned long pio_mask,
458 unsigned long mwdma_mask,
459 unsigned long udma_mask)
461 return ((pio_mask << ATA_SHIFT_PIO) & ATA_MASK_PIO) |
462 ((mwdma_mask << ATA_SHIFT_MWDMA) & ATA_MASK_MWDMA) |
463 ((udma_mask << ATA_SHIFT_UDMA) & ATA_MASK_UDMA);
467 * ata_unpack_xfermask - Unpack xfer_mask into pio, mwdma and udma masks
468 * @xfer_mask: xfer_mask to unpack
469 * @pio_mask: resulting pio_mask
470 * @mwdma_mask: resulting mwdma_mask
471 * @udma_mask: resulting udma_mask
473 * Unpack @xfer_mask into @pio_mask, @mwdma_mask and @udma_mask.
474 * Any NULL distination masks will be ignored.
476 void ata_unpack_xfermask(unsigned long xfer_mask, unsigned long *pio_mask,
477 unsigned long *mwdma_mask, unsigned long *udma_mask)
480 *pio_mask = (xfer_mask & ATA_MASK_PIO) >> ATA_SHIFT_PIO;
482 *mwdma_mask = (xfer_mask & ATA_MASK_MWDMA) >> ATA_SHIFT_MWDMA;
484 *udma_mask = (xfer_mask & ATA_MASK_UDMA) >> ATA_SHIFT_UDMA;
487 static const struct ata_xfer_ent {
491 { ATA_SHIFT_PIO, ATA_NR_PIO_MODES, XFER_PIO_0 },
492 { ATA_SHIFT_MWDMA, ATA_NR_MWDMA_MODES, XFER_MW_DMA_0 },
493 { ATA_SHIFT_UDMA, ATA_NR_UDMA_MODES, XFER_UDMA_0 },
498 * ata_xfer_mask2mode - Find matching XFER_* for the given xfer_mask
499 * @xfer_mask: xfer_mask of interest
501 * Return matching XFER_* value for @xfer_mask. Only the highest
502 * bit of @xfer_mask is considered.
508 * Matching XFER_* value, 0xff if no match found.
510 u8 ata_xfer_mask2mode(unsigned long xfer_mask)
512 int highbit = fls(xfer_mask) - 1;
513 const struct ata_xfer_ent *ent;
515 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
516 if (highbit >= ent->shift && highbit < ent->shift + ent->bits)
517 return ent->base + highbit - ent->shift;
522 * ata_xfer_mode2mask - Find matching xfer_mask for XFER_*
523 * @xfer_mode: XFER_* of interest
525 * Return matching xfer_mask for @xfer_mode.
531 * Matching xfer_mask, 0 if no match found.
533 unsigned long ata_xfer_mode2mask(u8 xfer_mode)
535 const struct ata_xfer_ent *ent;
537 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
538 if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits)
539 return ((2 << (ent->shift + xfer_mode - ent->base)) - 1)
540 & ~((1 << ent->shift) - 1);
545 * ata_xfer_mode2shift - Find matching xfer_shift for XFER_*
546 * @xfer_mode: XFER_* of interest
548 * Return matching xfer_shift for @xfer_mode.
554 * Matching xfer_shift, -1 if no match found.
556 int ata_xfer_mode2shift(unsigned long xfer_mode)
558 const struct ata_xfer_ent *ent;
560 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
561 if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits)
567 * ata_mode_string - convert xfer_mask to string
568 * @xfer_mask: mask of bits supported; only highest bit counts.
570 * Determine string which represents the highest speed
571 * (highest bit in @modemask).
577 * Constant C string representing highest speed listed in
578 * @mode_mask, or the constant C string "<n/a>".
580 const char *ata_mode_string(unsigned long xfer_mask)
582 static const char * const xfer_mode_str[] = {
606 highbit = fls(xfer_mask) - 1;
607 if (highbit >= 0 && highbit < ARRAY_SIZE(xfer_mode_str))
608 return xfer_mode_str[highbit];
612 static const char *sata_spd_string(unsigned int spd)
614 static const char * const spd_str[] = {
619 if (spd == 0 || (spd - 1) >= ARRAY_SIZE(spd_str))
621 return spd_str[spd - 1];
624 void ata_dev_disable(struct ata_device *dev)
626 if (ata_dev_enabled(dev)) {
627 if (ata_msg_drv(dev->link->ap))
628 ata_dev_printk(dev, KERN_WARNING, "disabled\n");
629 ata_acpi_on_disable(dev);
630 ata_down_xfermask_limit(dev, ATA_DNXFER_FORCE_PIO0 |
636 static int ata_dev_set_dipm(struct ata_device *dev, enum link_pm policy)
638 struct ata_link *link = dev->link;
639 struct ata_port *ap = link->ap;
641 unsigned int err_mask;
645 * disallow DIPM for drivers which haven't set
646 * ATA_FLAG_IPM. This is because when DIPM is enabled,
647 * phy ready will be set in the interrupt status on
648 * state changes, which will cause some drivers to
649 * think there are errors - additionally drivers will
650 * need to disable hot plug.
652 if (!(ap->flags & ATA_FLAG_IPM) || !ata_dev_enabled(dev)) {
653 ap->pm_policy = NOT_AVAILABLE;
658 * For DIPM, we will only enable it for the
661 * Why? Because Disks are too stupid to know that
662 * If the host rejects a request to go to SLUMBER
663 * they should retry at PARTIAL, and instead it
664 * just would give up. So, for medium_power to
665 * work at all, we need to only allow HIPM.
667 rc = sata_scr_read(link, SCR_CONTROL, &scontrol);
673 /* no restrictions on IPM transitions */
674 scontrol &= ~(0x3 << 8);
675 rc = sata_scr_write(link, SCR_CONTROL, scontrol);
680 if (dev->flags & ATA_DFLAG_DIPM)
681 err_mask = ata_dev_set_feature(dev,
682 SETFEATURES_SATA_ENABLE, SATA_DIPM);
685 /* allow IPM to PARTIAL */
686 scontrol &= ~(0x1 << 8);
687 scontrol |= (0x2 << 8);
688 rc = sata_scr_write(link, SCR_CONTROL, scontrol);
693 * we don't have to disable DIPM since IPM flags
694 * disallow transitions to SLUMBER, which effectively
695 * disable DIPM if it does not support PARTIAL
699 case MAX_PERFORMANCE:
700 /* disable all IPM transitions */
701 scontrol |= (0x3 << 8);
702 rc = sata_scr_write(link, SCR_CONTROL, scontrol);
707 * we don't have to disable DIPM since IPM flags
708 * disallow all transitions which effectively
709 * disable DIPM anyway.
714 /* FIXME: handle SET FEATURES failure */
721 * ata_dev_enable_pm - enable SATA interface power management
722 * @dev: device to enable power management
723 * @policy: the link power management policy
725 * Enable SATA Interface power management. This will enable
726 * Device Interface Power Management (DIPM) for min_power
727 * policy, and then call driver specific callbacks for
728 * enabling Host Initiated Power management.
731 * Returns: -EINVAL if IPM is not supported, 0 otherwise.
733 void ata_dev_enable_pm(struct ata_device *dev, enum link_pm policy)
736 struct ata_port *ap = dev->link->ap;
738 /* set HIPM first, then DIPM */
739 if (ap->ops->enable_pm)
740 rc = ap->ops->enable_pm(ap, policy);
743 rc = ata_dev_set_dipm(dev, policy);
747 ap->pm_policy = MAX_PERFORMANCE;
749 ap->pm_policy = policy;
750 return /* rc */; /* hopefully we can use 'rc' eventually */
755 * ata_dev_disable_pm - disable SATA interface power management
756 * @dev: device to disable power management
758 * Disable SATA Interface power management. This will disable
759 * Device Interface Power Management (DIPM) without changing
760 * policy, call driver specific callbacks for disabling Host
761 * Initiated Power management.
766 static void ata_dev_disable_pm(struct ata_device *dev)
768 struct ata_port *ap = dev->link->ap;
770 ata_dev_set_dipm(dev, MAX_PERFORMANCE);
771 if (ap->ops->disable_pm)
772 ap->ops->disable_pm(ap);
774 #endif /* CONFIG_PM */
776 void ata_lpm_schedule(struct ata_port *ap, enum link_pm policy)
778 ap->pm_policy = policy;
779 ap->link.eh_info.action |= ATA_EHI_LPM;
780 ap->link.eh_info.flags |= ATA_EHI_NO_AUTOPSY;
781 ata_port_schedule_eh(ap);
785 static void ata_lpm_enable(struct ata_host *host)
787 struct ata_link *link;
789 struct ata_device *dev;
792 for (i = 0; i < host->n_ports; i++) {
794 ata_port_for_each_link(link, ap) {
795 ata_link_for_each_dev(dev, link)
796 ata_dev_disable_pm(dev);
801 static void ata_lpm_disable(struct ata_host *host)
805 for (i = 0; i < host->n_ports; i++) {
806 struct ata_port *ap = host->ports[i];
807 ata_lpm_schedule(ap, ap->pm_policy);
810 #endif /* CONFIG_PM */
814 * ata_devchk - PATA device presence detection
815 * @ap: ATA channel to examine
816 * @device: Device to examine (starting at zero)
818 * This technique was originally described in
819 * Hale Landis's ATADRVR (www.ata-atapi.com), and
820 * later found its way into the ATA/ATAPI spec.
822 * Write a pattern to the ATA shadow registers,
823 * and if a device is present, it will respond by
824 * correctly storing and echoing back the
825 * ATA shadow register contents.
831 static unsigned int ata_devchk(struct ata_port *ap, unsigned int device)
833 struct ata_ioports *ioaddr = &ap->ioaddr;
836 ap->ops->dev_select(ap, device);
838 iowrite8(0x55, ioaddr->nsect_addr);
839 iowrite8(0xaa, ioaddr->lbal_addr);
841 iowrite8(0xaa, ioaddr->nsect_addr);
842 iowrite8(0x55, ioaddr->lbal_addr);
844 iowrite8(0x55, ioaddr->nsect_addr);
845 iowrite8(0xaa, ioaddr->lbal_addr);
847 nsect = ioread8(ioaddr->nsect_addr);
848 lbal = ioread8(ioaddr->lbal_addr);
850 if ((nsect == 0x55) && (lbal == 0xaa))
851 return 1; /* we found a device */
853 return 0; /* nothing found */
857 * ata_dev_classify - determine device type based on ATA-spec signature
858 * @tf: ATA taskfile register set for device to be identified
860 * Determine from taskfile register contents whether a device is
861 * ATA or ATAPI, as per "Signature and persistence" section
862 * of ATA/PI spec (volume 1, sect 5.14).
868 * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, %ATA_DEV_PMP or
869 * %ATA_DEV_UNKNOWN the event of failure.
871 unsigned int ata_dev_classify(const struct ata_taskfile *tf)
873 /* Apple's open source Darwin code hints that some devices only
874 * put a proper signature into the LBA mid/high registers,
875 * So, we only check those. It's sufficient for uniqueness.
877 * ATA/ATAPI-7 (d1532v1r1: Feb. 19, 2003) specified separate
878 * signatures for ATA and ATAPI devices attached on SerialATA,
879 * 0x3c/0xc3 and 0x69/0x96 respectively. However, SerialATA
880 * spec has never mentioned about using different signatures
881 * for ATA/ATAPI devices. Then, Serial ATA II: Port
882 * Multiplier specification began to use 0x69/0x96 to identify
883 * port multpliers and 0x3c/0xc3 to identify SEMB device.
884 * ATA/ATAPI-7 dropped descriptions about 0x3c/0xc3 and
885 * 0x69/0x96 shortly and described them as reserved for
888 * We follow the current spec and consider that 0x69/0x96
889 * identifies a port multiplier and 0x3c/0xc3 a SEMB device.
891 if ((tf->lbam == 0) && (tf->lbah == 0)) {
892 DPRINTK("found ATA device by sig\n");
896 if ((tf->lbam == 0x14) && (tf->lbah == 0xeb)) {
897 DPRINTK("found ATAPI device by sig\n");
898 return ATA_DEV_ATAPI;
901 if ((tf->lbam == 0x69) && (tf->lbah == 0x96)) {
902 DPRINTK("found PMP device by sig\n");
906 if ((tf->lbam == 0x3c) && (tf->lbah == 0xc3)) {
907 printk(KERN_INFO "ata: SEMB device ignored\n");
908 return ATA_DEV_SEMB_UNSUP; /* not yet */
911 DPRINTK("unknown device\n");
912 return ATA_DEV_UNKNOWN;
916 * ata_dev_try_classify - Parse returned ATA device signature
917 * @dev: ATA device to classify (starting at zero)
918 * @present: device seems present
919 * @r_err: Value of error register on completion
921 * After an event -- SRST, E.D.D., or SATA COMRESET -- occurs,
922 * an ATA/ATAPI-defined set of values is placed in the ATA
923 * shadow registers, indicating the results of device detection
926 * Select the ATA device, and read the values from the ATA shadow
927 * registers. Then parse according to the Error register value,
928 * and the spec-defined values examined by ata_dev_classify().
934 * Device type - %ATA_DEV_ATA, %ATA_DEV_ATAPI or %ATA_DEV_NONE.
936 unsigned int ata_dev_try_classify(struct ata_device *dev, int present,
939 struct ata_port *ap = dev->link->ap;
940 struct ata_taskfile tf;
944 ap->ops->dev_select(ap, dev->devno);
946 memset(&tf, 0, sizeof(tf));
948 ap->ops->tf_read(ap, &tf);
953 /* see if device passed diags: continue and warn later */
955 /* diagnostic fail : do nothing _YET_ */
956 dev->horkage |= ATA_HORKAGE_DIAGNOSTIC;
959 else if ((dev->devno == 0) && (err == 0x81))
964 /* determine if device is ATA or ATAPI */
965 class = ata_dev_classify(&tf);
967 if (class == ATA_DEV_UNKNOWN) {
968 /* If the device failed diagnostic, it's likely to
969 * have reported incorrect device signature too.
970 * Assume ATA device if the device seems present but
971 * device signature is invalid with diagnostic
974 if (present && (dev->horkage & ATA_HORKAGE_DIAGNOSTIC))
977 class = ATA_DEV_NONE;
978 } else if ((class == ATA_DEV_ATA) && (ata_chk_status(ap) == 0))
979 class = ATA_DEV_NONE;
985 * ata_id_string - Convert IDENTIFY DEVICE page into string
986 * @id: IDENTIFY DEVICE results we will examine
987 * @s: string into which data is output
988 * @ofs: offset into identify device page
989 * @len: length of string to return. must be an even number.
991 * The strings in the IDENTIFY DEVICE page are broken up into
992 * 16-bit chunks. Run through the string, and output each
993 * 8-bit chunk linearly, regardless of platform.
999 void ata_id_string(const u16 *id, unsigned char *s,
1000 unsigned int ofs, unsigned int len)
1019 * ata_id_c_string - Convert IDENTIFY DEVICE page into C string
1020 * @id: IDENTIFY DEVICE results we will examine
1021 * @s: string into which data is output
1022 * @ofs: offset into identify device page
1023 * @len: length of string to return. must be an odd number.
1025 * This function is identical to ata_id_string except that it
1026 * trims trailing spaces and terminates the resulting string with
1027 * null. @len must be actual maximum length (even number) + 1.
1032 void ata_id_c_string(const u16 *id, unsigned char *s,
1033 unsigned int ofs, unsigned int len)
1037 WARN_ON(!(len & 1));
1039 ata_id_string(id, s, ofs, len - 1);
1041 p = s + strnlen(s, len - 1);
1042 while (p > s && p[-1] == ' ')
1047 static u64 ata_id_n_sectors(const u16 *id)
1049 if (ata_id_has_lba(id)) {
1050 if (ata_id_has_lba48(id))
1051 return ata_id_u64(id, 100);
1053 return ata_id_u32(id, 60);
1055 if (ata_id_current_chs_valid(id))
1056 return ata_id_u32(id, 57);
1058 return id[1] * id[3] * id[6];
1062 static u64 ata_tf_to_lba48(struct ata_taskfile *tf)
1066 sectors |= ((u64)(tf->hob_lbah & 0xff)) << 40;
1067 sectors |= ((u64)(tf->hob_lbam & 0xff)) << 32;
1068 sectors |= (tf->hob_lbal & 0xff) << 24;
1069 sectors |= (tf->lbah & 0xff) << 16;
1070 sectors |= (tf->lbam & 0xff) << 8;
1071 sectors |= (tf->lbal & 0xff);
1076 static u64 ata_tf_to_lba(struct ata_taskfile *tf)
1080 sectors |= (tf->device & 0x0f) << 24;
1081 sectors |= (tf->lbah & 0xff) << 16;
1082 sectors |= (tf->lbam & 0xff) << 8;
1083 sectors |= (tf->lbal & 0xff);
1089 * ata_read_native_max_address - Read native max address
1090 * @dev: target device
1091 * @max_sectors: out parameter for the result native max address
1093 * Perform an LBA48 or LBA28 native size query upon the device in
1097 * 0 on success, -EACCES if command is aborted by the drive.
1098 * -EIO on other errors.
1100 static int ata_read_native_max_address(struct ata_device *dev, u64 *max_sectors)
1102 unsigned int err_mask;
1103 struct ata_taskfile tf;
1104 int lba48 = ata_id_has_lba48(dev->id);
1106 ata_tf_init(dev, &tf);
1108 /* always clear all address registers */
1109 tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
1112 tf.command = ATA_CMD_READ_NATIVE_MAX_EXT;
1113 tf.flags |= ATA_TFLAG_LBA48;
1115 tf.command = ATA_CMD_READ_NATIVE_MAX;
1117 tf.protocol |= ATA_PROT_NODATA;
1118 tf.device |= ATA_LBA;
1120 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
1122 ata_dev_printk(dev, KERN_WARNING, "failed to read native "
1123 "max address (err_mask=0x%x)\n", err_mask);
1124 if (err_mask == AC_ERR_DEV && (tf.feature & ATA_ABORTED))
1130 *max_sectors = ata_tf_to_lba48(&tf);
1132 *max_sectors = ata_tf_to_lba(&tf);
1133 if (dev->horkage & ATA_HORKAGE_HPA_SIZE)
1139 * ata_set_max_sectors - Set max sectors
1140 * @dev: target device
1141 * @new_sectors: new max sectors value to set for the device
1143 * Set max sectors of @dev to @new_sectors.
1146 * 0 on success, -EACCES if command is aborted or denied (due to
1147 * previous non-volatile SET_MAX) by the drive. -EIO on other
1150 static int ata_set_max_sectors(struct ata_device *dev, u64 new_sectors)
1152 unsigned int err_mask;
1153 struct ata_taskfile tf;
1154 int lba48 = ata_id_has_lba48(dev->id);
1158 ata_tf_init(dev, &tf);
1160 tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
1163 tf.command = ATA_CMD_SET_MAX_EXT;
1164 tf.flags |= ATA_TFLAG_LBA48;
1166 tf.hob_lbal = (new_sectors >> 24) & 0xff;
1167 tf.hob_lbam = (new_sectors >> 32) & 0xff;
1168 tf.hob_lbah = (new_sectors >> 40) & 0xff;
1170 tf.command = ATA_CMD_SET_MAX;
1172 tf.device |= (new_sectors >> 24) & 0xf;
1175 tf.protocol |= ATA_PROT_NODATA;
1176 tf.device |= ATA_LBA;
1178 tf.lbal = (new_sectors >> 0) & 0xff;
1179 tf.lbam = (new_sectors >> 8) & 0xff;
1180 tf.lbah = (new_sectors >> 16) & 0xff;
1182 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
1184 ata_dev_printk(dev, KERN_WARNING, "failed to set "
1185 "max address (err_mask=0x%x)\n", err_mask);
1186 if (err_mask == AC_ERR_DEV &&
1187 (tf.feature & (ATA_ABORTED | ATA_IDNF)))
1196 * ata_hpa_resize - Resize a device with an HPA set
1197 * @dev: Device to resize
1199 * Read the size of an LBA28 or LBA48 disk with HPA features and resize
1200 * it if required to the full size of the media. The caller must check
1201 * the drive has the HPA feature set enabled.
1204 * 0 on success, -errno on failure.
1206 static int ata_hpa_resize(struct ata_device *dev)
1208 struct ata_eh_context *ehc = &dev->link->eh_context;
1209 int print_info = ehc->i.flags & ATA_EHI_PRINTINFO;
1210 u64 sectors = ata_id_n_sectors(dev->id);
1214 /* do we need to do it? */
1215 if (dev->class != ATA_DEV_ATA ||
1216 !ata_id_has_lba(dev->id) || !ata_id_hpa_enabled(dev->id) ||
1217 (dev->horkage & ATA_HORKAGE_BROKEN_HPA))
1220 /* read native max address */
1221 rc = ata_read_native_max_address(dev, &native_sectors);
1223 /* If HPA isn't going to be unlocked, skip HPA
1224 * resizing from the next try.
1226 if (!ata_ignore_hpa) {
1227 ata_dev_printk(dev, KERN_WARNING, "HPA support seems "
1228 "broken, will skip HPA handling\n");
1229 dev->horkage |= ATA_HORKAGE_BROKEN_HPA;
1231 /* we can continue if device aborted the command */
1239 /* nothing to do? */
1240 if (native_sectors <= sectors || !ata_ignore_hpa) {
1241 if (!print_info || native_sectors == sectors)
1244 if (native_sectors > sectors)
1245 ata_dev_printk(dev, KERN_INFO,
1246 "HPA detected: current %llu, native %llu\n",
1247 (unsigned long long)sectors,
1248 (unsigned long long)native_sectors);
1249 else if (native_sectors < sectors)
1250 ata_dev_printk(dev, KERN_WARNING,
1251 "native sectors (%llu) is smaller than "
1253 (unsigned long long)native_sectors,
1254 (unsigned long long)sectors);
1258 /* let's unlock HPA */
1259 rc = ata_set_max_sectors(dev, native_sectors);
1260 if (rc == -EACCES) {
1261 /* if device aborted the command, skip HPA resizing */
1262 ata_dev_printk(dev, KERN_WARNING, "device aborted resize "
1263 "(%llu -> %llu), skipping HPA handling\n",
1264 (unsigned long long)sectors,
1265 (unsigned long long)native_sectors);
1266 dev->horkage |= ATA_HORKAGE_BROKEN_HPA;
1271 /* re-read IDENTIFY data */
1272 rc = ata_dev_reread_id(dev, 0);
1274 ata_dev_printk(dev, KERN_ERR, "failed to re-read IDENTIFY "
1275 "data after HPA resizing\n");
1280 u64 new_sectors = ata_id_n_sectors(dev->id);
1281 ata_dev_printk(dev, KERN_INFO,
1282 "HPA unlocked: %llu -> %llu, native %llu\n",
1283 (unsigned long long)sectors,
1284 (unsigned long long)new_sectors,
1285 (unsigned long long)native_sectors);
1292 * ata_noop_dev_select - Select device 0/1 on ATA bus
1293 * @ap: ATA channel to manipulate
1294 * @device: ATA device (numbered from zero) to select
1296 * This function performs no actual function.
1298 * May be used as the dev_select() entry in ata_port_operations.
1303 void ata_noop_dev_select(struct ata_port *ap, unsigned int device)
1309 * ata_std_dev_select - Select device 0/1 on ATA bus
1310 * @ap: ATA channel to manipulate
1311 * @device: ATA device (numbered from zero) to select
1313 * Use the method defined in the ATA specification to
1314 * make either device 0, or device 1, active on the
1315 * ATA channel. Works with both PIO and MMIO.
1317 * May be used as the dev_select() entry in ata_port_operations.
1323 void ata_std_dev_select(struct ata_port *ap, unsigned int device)
1328 tmp = ATA_DEVICE_OBS;
1330 tmp = ATA_DEVICE_OBS | ATA_DEV1;
1332 iowrite8(tmp, ap->ioaddr.device_addr);
1333 ata_pause(ap); /* needed; also flushes, for mmio */
1337 * ata_dev_select - Select device 0/1 on ATA bus
1338 * @ap: ATA channel to manipulate
1339 * @device: ATA device (numbered from zero) to select
1340 * @wait: non-zero to wait for Status register BSY bit to clear
1341 * @can_sleep: non-zero if context allows sleeping
1343 * Use the method defined in the ATA specification to
1344 * make either device 0, or device 1, active on the
1347 * This is a high-level version of ata_std_dev_select(),
1348 * which additionally provides the services of inserting
1349 * the proper pauses and status polling, where needed.
1355 void ata_dev_select(struct ata_port *ap, unsigned int device,
1356 unsigned int wait, unsigned int can_sleep)
1358 if (ata_msg_probe(ap))
1359 ata_port_printk(ap, KERN_INFO, "ata_dev_select: ENTER, "
1360 "device %u, wait %u\n", device, wait);
1365 ap->ops->dev_select(ap, device);
1368 if (can_sleep && ap->link.device[device].class == ATA_DEV_ATAPI)
1375 * ata_dump_id - IDENTIFY DEVICE info debugging output
1376 * @id: IDENTIFY DEVICE page to dump
1378 * Dump selected 16-bit words from the given IDENTIFY DEVICE
1385 static inline void ata_dump_id(const u16 *id)
1387 DPRINTK("49==0x%04x "
1397 DPRINTK("80==0x%04x "
1407 DPRINTK("88==0x%04x "
1414 * ata_id_xfermask - Compute xfermask from the given IDENTIFY data
1415 * @id: IDENTIFY data to compute xfer mask from
1417 * Compute the xfermask for this device. This is not as trivial
1418 * as it seems if we must consider early devices correctly.
1420 * FIXME: pre IDE drive timing (do we care ?).
1428 unsigned long ata_id_xfermask(const u16 *id)
1430 unsigned long pio_mask, mwdma_mask, udma_mask;
1432 /* Usual case. Word 53 indicates word 64 is valid */
1433 if (id[ATA_ID_FIELD_VALID] & (1 << 1)) {
1434 pio_mask = id[ATA_ID_PIO_MODES] & 0x03;
1438 /* If word 64 isn't valid then Word 51 high byte holds
1439 * the PIO timing number for the maximum. Turn it into
1442 u8 mode = (id[ATA_ID_OLD_PIO_MODES] >> 8) & 0xFF;
1443 if (mode < 5) /* Valid PIO range */
1444 pio_mask = (2 << mode) - 1;
1448 /* But wait.. there's more. Design your standards by
1449 * committee and you too can get a free iordy field to
1450 * process. However its the speeds not the modes that
1451 * are supported... Note drivers using the timing API
1452 * will get this right anyway
1456 mwdma_mask = id[ATA_ID_MWDMA_MODES] & 0x07;
1458 if (ata_id_is_cfa(id)) {
1460 * Process compact flash extended modes
1462 int pio = id[163] & 0x7;
1463 int dma = (id[163] >> 3) & 7;
1466 pio_mask |= (1 << 5);
1468 pio_mask |= (1 << 6);
1470 mwdma_mask |= (1 << 3);
1472 mwdma_mask |= (1 << 4);
1476 if (id[ATA_ID_FIELD_VALID] & (1 << 2))
1477 udma_mask = id[ATA_ID_UDMA_MODES] & 0xff;
1479 return ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask);
1483 * ata_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 /* Limit PATA drive on SATA cable bridge transfers to udma5,
2267 if (ata_dev_knobble(dev)) {
2268 if (ata_msg_drv(ap) && print_info)
2269 ata_dev_printk(dev, KERN_INFO,
2270 "applying bridge limits\n");
2271 dev->udma_mask &= ATA_UDMA5;
2272 dev->max_sectors = ATA_MAX_SECTORS;
2275 if ((dev->class == ATA_DEV_ATAPI) &&
2276 (atapi_command_packet_set(id) == TYPE_TAPE)) {
2277 dev->max_sectors = ATA_MAX_SECTORS_TAPE;
2278 dev->horkage |= ATA_HORKAGE_STUCK_ERR;
2281 if (dev->horkage & ATA_HORKAGE_MAX_SEC_128)
2282 dev->max_sectors = min_t(unsigned int, ATA_MAX_SECTORS_128,
2285 if (ata_dev_blacklisted(dev) & ATA_HORKAGE_IPM) {
2286 dev->horkage |= ATA_HORKAGE_IPM;
2288 /* reset link pm_policy for this port to no pm */
2289 ap->pm_policy = MAX_PERFORMANCE;
2292 if (ap->ops->dev_config)
2293 ap->ops->dev_config(dev);
2295 if (dev->horkage & ATA_HORKAGE_DIAGNOSTIC) {
2296 /* Let the user know. We don't want to disallow opens for
2297 rescue purposes, or in case the vendor is just a blithering
2298 idiot. Do this after the dev_config call as some controllers
2299 with buggy firmware may want to avoid reporting false device
2303 ata_dev_printk(dev, KERN_WARNING,
2304 "Drive reports diagnostics failure. This may indicate a drive\n");
2305 ata_dev_printk(dev, KERN_WARNING,
2306 "fault or invalid emulation. Contact drive vendor for information.\n");
2310 if (ata_msg_probe(ap))
2311 ata_dev_printk(dev, KERN_DEBUG, "%s: EXIT, drv_stat = 0x%x\n",
2312 __FUNCTION__, ata_chk_status(ap));
2316 if (ata_msg_probe(ap))
2317 ata_dev_printk(dev, KERN_DEBUG,
2318 "%s: EXIT, err\n", __FUNCTION__);
2323 * ata_cable_40wire - return 40 wire cable type
2326 * Helper method for drivers which want to hardwire 40 wire cable
2330 int ata_cable_40wire(struct ata_port *ap)
2332 return ATA_CBL_PATA40;
2336 * ata_cable_80wire - return 80 wire cable type
2339 * Helper method for drivers which want to hardwire 80 wire cable
2343 int ata_cable_80wire(struct ata_port *ap)
2345 return ATA_CBL_PATA80;
2349 * ata_cable_unknown - return unknown PATA cable.
2352 * Helper method for drivers which have no PATA cable detection.
2355 int ata_cable_unknown(struct ata_port *ap)
2357 return ATA_CBL_PATA_UNK;
2361 * ata_cable_ignore - return ignored PATA cable.
2364 * Helper method for drivers which don't use cable type to limit
2367 int ata_cable_ignore(struct ata_port *ap)
2369 return ATA_CBL_PATA_IGN;
2373 * ata_cable_sata - return SATA cable type
2376 * Helper method for drivers which have SATA cables
2379 int ata_cable_sata(struct ata_port *ap)
2381 return ATA_CBL_SATA;
2385 * ata_bus_probe - Reset and probe ATA bus
2388 * Master ATA bus probing function. Initiates a hardware-dependent
2389 * bus reset, then attempts to identify any devices found on
2393 * PCI/etc. bus probe sem.
2396 * Zero on success, negative errno otherwise.
2399 int ata_bus_probe(struct ata_port *ap)
2401 unsigned int classes[ATA_MAX_DEVICES];
2402 int tries[ATA_MAX_DEVICES];
2404 struct ata_device *dev;
2408 ata_link_for_each_dev(dev, &ap->link)
2409 tries[dev->devno] = ATA_PROBE_MAX_TRIES;
2412 ata_link_for_each_dev(dev, &ap->link) {
2413 /* If we issue an SRST then an ATA drive (not ATAPI)
2414 * may change configuration and be in PIO0 timing. If
2415 * we do a hard reset (or are coming from power on)
2416 * this is true for ATA or ATAPI. Until we've set a
2417 * suitable controller mode we should not touch the
2418 * bus as we may be talking too fast.
2420 dev->pio_mode = XFER_PIO_0;
2422 /* If the controller has a pio mode setup function
2423 * then use it to set the chipset to rights. Don't
2424 * touch the DMA setup as that will be dealt with when
2425 * configuring devices.
2427 if (ap->ops->set_piomode)
2428 ap->ops->set_piomode(ap, dev);
2431 /* reset and determine device classes */
2432 ap->ops->phy_reset(ap);
2434 ata_link_for_each_dev(dev, &ap->link) {
2435 if (!(ap->flags & ATA_FLAG_DISABLED) &&
2436 dev->class != ATA_DEV_UNKNOWN)
2437 classes[dev->devno] = dev->class;
2439 classes[dev->devno] = ATA_DEV_NONE;
2441 dev->class = ATA_DEV_UNKNOWN;
2446 /* read IDENTIFY page and configure devices. We have to do the identify
2447 specific sequence bass-ackwards so that PDIAG- is released by
2450 ata_link_for_each_dev(dev, &ap->link) {
2451 if (tries[dev->devno])
2452 dev->class = classes[dev->devno];
2454 if (!ata_dev_enabled(dev))
2457 rc = ata_dev_read_id(dev, &dev->class, ATA_READID_POSTRESET,
2463 /* Now ask for the cable type as PDIAG- should have been released */
2464 if (ap->ops->cable_detect)
2465 ap->cbl = ap->ops->cable_detect(ap);
2467 /* We may have SATA bridge glue hiding here irrespective of the
2468 reported cable types and sensed types */
2469 ata_link_for_each_dev(dev, &ap->link) {
2470 if (!ata_dev_enabled(dev))
2472 /* SATA drives indicate we have a bridge. We don't know which
2473 end of the link the bridge is which is a problem */
2474 if (ata_id_is_sata(dev->id))
2475 ap->cbl = ATA_CBL_SATA;
2478 /* After the identify sequence we can now set up the devices. We do
2479 this in the normal order so that the user doesn't get confused */
2481 ata_link_for_each_dev(dev, &ap->link) {
2482 if (!ata_dev_enabled(dev))
2485 ap->link.eh_context.i.flags |= ATA_EHI_PRINTINFO;
2486 rc = ata_dev_configure(dev);
2487 ap->link.eh_context.i.flags &= ~ATA_EHI_PRINTINFO;
2492 /* configure transfer mode */
2493 rc = ata_set_mode(&ap->link, &dev);
2497 ata_link_for_each_dev(dev, &ap->link)
2498 if (ata_dev_enabled(dev))
2501 /* no device present, disable port */
2502 ata_port_disable(ap);
2506 tries[dev->devno]--;
2510 /* eeek, something went very wrong, give up */
2511 tries[dev->devno] = 0;
2515 /* give it just one more chance */
2516 tries[dev->devno] = min(tries[dev->devno], 1);
2518 if (tries[dev->devno] == 1) {
2519 /* This is the last chance, better to slow
2520 * down than lose it.
2522 sata_down_spd_limit(&ap->link);
2523 ata_down_xfermask_limit(dev, ATA_DNXFER_PIO);
2527 if (!tries[dev->devno])
2528 ata_dev_disable(dev);
2534 * ata_port_probe - Mark port as enabled
2535 * @ap: Port for which we indicate enablement
2537 * Modify @ap data structure such that the system
2538 * thinks that the entire port is enabled.
2540 * LOCKING: host lock, or some other form of
2544 void ata_port_probe(struct ata_port *ap)
2546 ap->flags &= ~ATA_FLAG_DISABLED;
2550 * sata_print_link_status - Print SATA link status
2551 * @link: SATA link to printk link status about
2553 * This function prints link speed and status of a SATA link.
2558 void sata_print_link_status(struct ata_link *link)
2560 u32 sstatus, scontrol, tmp;
2562 if (sata_scr_read(link, SCR_STATUS, &sstatus))
2564 sata_scr_read(link, SCR_CONTROL, &scontrol);
2566 if (ata_link_online(link)) {
2567 tmp = (sstatus >> 4) & 0xf;
2568 ata_link_printk(link, KERN_INFO,
2569 "SATA link up %s (SStatus %X SControl %X)\n",
2570 sata_spd_string(tmp), sstatus, scontrol);
2572 ata_link_printk(link, KERN_INFO,
2573 "SATA link down (SStatus %X SControl %X)\n",
2579 * ata_dev_pair - return other device on cable
2582 * Obtain the other device on the same cable, or if none is
2583 * present NULL is returned
2586 struct ata_device *ata_dev_pair(struct ata_device *adev)
2588 struct ata_link *link = adev->link;
2589 struct ata_device *pair = &link->device[1 - adev->devno];
2590 if (!ata_dev_enabled(pair))
2596 * ata_port_disable - Disable port.
2597 * @ap: Port to be disabled.
2599 * Modify @ap data structure such that the system
2600 * thinks that the entire port is disabled, and should
2601 * never attempt to probe or communicate with devices
2604 * LOCKING: host lock, or some other form of
2608 void ata_port_disable(struct ata_port *ap)
2610 ap->link.device[0].class = ATA_DEV_NONE;
2611 ap->link.device[1].class = ATA_DEV_NONE;
2612 ap->flags |= ATA_FLAG_DISABLED;
2616 * sata_down_spd_limit - adjust SATA spd limit downward
2617 * @link: Link to adjust SATA spd limit for
2619 * Adjust SATA spd limit of @link downward. Note that this
2620 * function only adjusts the limit. The change must be applied
2621 * using sata_set_spd().
2624 * Inherited from caller.
2627 * 0 on success, negative errno on failure
2629 int sata_down_spd_limit(struct ata_link *link)
2631 u32 sstatus, spd, mask;
2634 if (!sata_scr_valid(link))
2637 /* If SCR can be read, use it to determine the current SPD.
2638 * If not, use cached value in link->sata_spd.
2640 rc = sata_scr_read(link, SCR_STATUS, &sstatus);
2642 spd = (sstatus >> 4) & 0xf;
2644 spd = link->sata_spd;
2646 mask = link->sata_spd_limit;
2650 /* unconditionally mask off the highest bit */
2651 highbit = fls(mask) - 1;
2652 mask &= ~(1 << highbit);
2654 /* Mask off all speeds higher than or equal to the current
2655 * one. Force 1.5Gbps if current SPD is not available.
2658 mask &= (1 << (spd - 1)) - 1;
2662 /* were we already at the bottom? */
2666 link->sata_spd_limit = mask;
2668 ata_link_printk(link, KERN_WARNING, "limiting SATA link speed to %s\n",
2669 sata_spd_string(fls(mask)));
2674 static int __sata_set_spd_needed(struct ata_link *link, u32 *scontrol)
2676 struct ata_link *host_link = &link->ap->link;
2677 u32 limit, target, spd;
2679 limit = link->sata_spd_limit;
2681 /* Don't configure downstream link faster than upstream link.
2682 * It doesn't speed up anything and some PMPs choke on such
2685 if (!ata_is_host_link(link) && host_link->sata_spd)
2686 limit &= (1 << host_link->sata_spd) - 1;
2688 if (limit == UINT_MAX)
2691 target = fls(limit);
2693 spd = (*scontrol >> 4) & 0xf;
2694 *scontrol = (*scontrol & ~0xf0) | ((target & 0xf) << 4);
2696 return spd != target;
2700 * sata_set_spd_needed - is SATA spd configuration needed
2701 * @link: Link in question
2703 * Test whether the spd limit in SControl matches
2704 * @link->sata_spd_limit. This function is used to determine
2705 * whether hardreset is necessary to apply SATA spd
2709 * Inherited from caller.
2712 * 1 if SATA spd configuration is needed, 0 otherwise.
2714 int sata_set_spd_needed(struct ata_link *link)
2718 if (sata_scr_read(link, SCR_CONTROL, &scontrol))
2721 return __sata_set_spd_needed(link, &scontrol);
2725 * sata_set_spd - set SATA spd according to spd limit
2726 * @link: Link to set SATA spd for
2728 * Set SATA spd of @link according to sata_spd_limit.
2731 * Inherited from caller.
2734 * 0 if spd doesn't need to be changed, 1 if spd has been
2735 * changed. Negative errno if SCR registers are inaccessible.
2737 int sata_set_spd(struct ata_link *link)
2742 if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
2745 if (!__sata_set_spd_needed(link, &scontrol))
2748 if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol)))
2755 * This mode timing computation functionality is ported over from
2756 * drivers/ide/ide-timing.h and was originally written by Vojtech Pavlik
2759 * PIO 0-4, MWDMA 0-2 and UDMA 0-6 timings (in nanoseconds).
2760 * These were taken from ATA/ATAPI-6 standard, rev 0a, except
2761 * for UDMA6, which is currently supported only by Maxtor drives.
2763 * For PIO 5/6 MWDMA 3/4 see the CFA specification 3.0.
2766 static const struct ata_timing ata_timing[] = {
2767 /* { XFER_PIO_SLOW, 120, 290, 240, 960, 290, 240, 960, 0 }, */
2768 { XFER_PIO_0, 70, 290, 240, 600, 165, 150, 600, 0 },
2769 { XFER_PIO_1, 50, 290, 93, 383, 125, 100, 383, 0 },
2770 { XFER_PIO_2, 30, 290, 40, 330, 100, 90, 240, 0 },
2771 { XFER_PIO_3, 30, 80, 70, 180, 80, 70, 180, 0 },
2772 { XFER_PIO_4, 25, 70, 25, 120, 70, 25, 120, 0 },
2773 { XFER_PIO_5, 15, 65, 25, 100, 65, 25, 100, 0 },
2774 { XFER_PIO_6, 10, 55, 20, 80, 55, 20, 80, 0 },
2776 { XFER_SW_DMA_0, 120, 0, 0, 0, 480, 480, 960, 0 },
2777 { XFER_SW_DMA_1, 90, 0, 0, 0, 240, 240, 480, 0 },
2778 { XFER_SW_DMA_2, 60, 0, 0, 0, 120, 120, 240, 0 },
2780 { XFER_MW_DMA_0, 60, 0, 0, 0, 215, 215, 480, 0 },
2781 { XFER_MW_DMA_1, 45, 0, 0, 0, 80, 50, 150, 0 },
2782 { XFER_MW_DMA_2, 25, 0, 0, 0, 70, 25, 120, 0 },
2783 { XFER_MW_DMA_3, 25, 0, 0, 0, 65, 25, 100, 0 },
2784 { XFER_MW_DMA_4, 25, 0, 0, 0, 55, 20, 80, 0 },
2786 /* { XFER_UDMA_SLOW, 0, 0, 0, 0, 0, 0, 0, 150 }, */
2787 { XFER_UDMA_0, 0, 0, 0, 0, 0, 0, 0, 120 },
2788 { XFER_UDMA_1, 0, 0, 0, 0, 0, 0, 0, 80 },
2789 { XFER_UDMA_2, 0, 0, 0, 0, 0, 0, 0, 60 },
2790 { XFER_UDMA_3, 0, 0, 0, 0, 0, 0, 0, 45 },
2791 { XFER_UDMA_4, 0, 0, 0, 0, 0, 0, 0, 30 },
2792 { XFER_UDMA_5, 0, 0, 0, 0, 0, 0, 0, 20 },
2793 { XFER_UDMA_6, 0, 0, 0, 0, 0, 0, 0, 15 },
2798 #define ENOUGH(v, unit) (((v)-1)/(unit)+1)
2799 #define EZ(v, unit) ((v)?ENOUGH(v, unit):0)
2801 static void ata_timing_quantize(const struct ata_timing *t, struct ata_timing *q, int T, int UT)
2803 q->setup = EZ(t->setup * 1000, T);
2804 q->act8b = EZ(t->act8b * 1000, T);
2805 q->rec8b = EZ(t->rec8b * 1000, T);
2806 q->cyc8b = EZ(t->cyc8b * 1000, T);
2807 q->active = EZ(t->active * 1000, T);
2808 q->recover = EZ(t->recover * 1000, T);
2809 q->cycle = EZ(t->cycle * 1000, T);
2810 q->udma = EZ(t->udma * 1000, UT);
2813 void ata_timing_merge(const struct ata_timing *a, const struct ata_timing *b,
2814 struct ata_timing *m, unsigned int what)
2816 if (what & ATA_TIMING_SETUP ) m->setup = max(a->setup, b->setup);
2817 if (what & ATA_TIMING_ACT8B ) m->act8b = max(a->act8b, b->act8b);
2818 if (what & ATA_TIMING_REC8B ) m->rec8b = max(a->rec8b, b->rec8b);
2819 if (what & ATA_TIMING_CYC8B ) m->cyc8b = max(a->cyc8b, b->cyc8b);
2820 if (what & ATA_TIMING_ACTIVE ) m->active = max(a->active, b->active);
2821 if (what & ATA_TIMING_RECOVER) m->recover = max(a->recover, b->recover);
2822 if (what & ATA_TIMING_CYCLE ) m->cycle = max(a->cycle, b->cycle);
2823 if (what & ATA_TIMING_UDMA ) m->udma = max(a->udma, b->udma);
2826 const struct ata_timing *ata_timing_find_mode(u8 xfer_mode)
2828 const struct ata_timing *t = ata_timing;
2830 while (xfer_mode > t->mode)
2833 if (xfer_mode == t->mode)
2838 int ata_timing_compute(struct ata_device *adev, unsigned short speed,
2839 struct ata_timing *t, int T, int UT)
2841 const struct ata_timing *s;
2842 struct ata_timing p;
2848 if (!(s = ata_timing_find_mode(speed)))
2851 memcpy(t, s, sizeof(*s));
2854 * If the drive is an EIDE drive, it can tell us it needs extended
2855 * PIO/MW_DMA cycle timing.
2858 if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE drive */
2859 memset(&p, 0, sizeof(p));
2860 if (speed >= XFER_PIO_0 && speed <= XFER_SW_DMA_0) {
2861 if (speed <= XFER_PIO_2) p.cycle = p.cyc8b = adev->id[ATA_ID_EIDE_PIO];
2862 else p.cycle = p.cyc8b = adev->id[ATA_ID_EIDE_PIO_IORDY];
2863 } else if (speed >= XFER_MW_DMA_0 && speed <= XFER_MW_DMA_2) {
2864 p.cycle = adev->id[ATA_ID_EIDE_DMA_MIN];
2866 ata_timing_merge(&p, t, t, ATA_TIMING_CYCLE | ATA_TIMING_CYC8B);
2870 * Convert the timing to bus clock counts.
2873 ata_timing_quantize(t, t, T, UT);
2876 * Even in DMA/UDMA modes we still use PIO access for IDENTIFY,
2877 * S.M.A.R.T * and some other commands. We have to ensure that the
2878 * DMA cycle timing is slower/equal than the fastest PIO timing.
2881 if (speed > XFER_PIO_6) {
2882 ata_timing_compute(adev, adev->pio_mode, &p, T, UT);
2883 ata_timing_merge(&p, t, t, ATA_TIMING_ALL);
2887 * Lengthen active & recovery time so that cycle time is correct.
2890 if (t->act8b + t->rec8b < t->cyc8b) {
2891 t->act8b += (t->cyc8b - (t->act8b + t->rec8b)) / 2;
2892 t->rec8b = t->cyc8b - t->act8b;
2895 if (t->active + t->recover < t->cycle) {
2896 t->active += (t->cycle - (t->active + t->recover)) / 2;
2897 t->recover = t->cycle - t->active;
2900 /* In a few cases quantisation may produce enough errors to
2901 leave t->cycle too low for the sum of active and recovery
2902 if so we must correct this */
2903 if (t->active + t->recover > t->cycle)
2904 t->cycle = t->active + t->recover;
2910 * ata_timing_cycle2mode - find xfer mode for the specified cycle duration
2911 * @xfer_shift: ATA_SHIFT_* value for transfer type to examine.
2912 * @cycle: cycle duration in ns
2914 * Return matching xfer mode for @cycle. The returned mode is of
2915 * the transfer type specified by @xfer_shift. If @cycle is too
2916 * slow for @xfer_shift, 0xff is returned. If @cycle is faster
2917 * than the fastest known mode, the fasted mode is returned.
2923 * Matching xfer_mode, 0xff if no match found.
2925 u8 ata_timing_cycle2mode(unsigned int xfer_shift, int cycle)
2927 u8 base_mode = 0xff, last_mode = 0xff;
2928 const struct ata_xfer_ent *ent;
2929 const struct ata_timing *t;
2931 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
2932 if (ent->shift == xfer_shift)
2933 base_mode = ent->base;
2935 for (t = ata_timing_find_mode(base_mode);
2936 t && ata_xfer_mode2shift(t->mode) == xfer_shift; t++) {
2937 unsigned short this_cycle;
2939 switch (xfer_shift) {
2941 case ATA_SHIFT_MWDMA:
2942 this_cycle = t->cycle;
2944 case ATA_SHIFT_UDMA:
2945 this_cycle = t->udma;
2951 if (cycle > this_cycle)
2954 last_mode = t->mode;
2961 * ata_down_xfermask_limit - adjust dev xfer masks downward
2962 * @dev: Device to adjust xfer masks
2963 * @sel: ATA_DNXFER_* selector
2965 * Adjust xfer masks of @dev downward. Note that this function
2966 * does not apply the change. Invoking ata_set_mode() afterwards
2967 * will apply the limit.
2970 * Inherited from caller.
2973 * 0 on success, negative errno on failure
2975 int ata_down_xfermask_limit(struct ata_device *dev, unsigned int sel)
2978 unsigned long orig_mask, xfer_mask;
2979 unsigned long pio_mask, mwdma_mask, udma_mask;
2982 quiet = !!(sel & ATA_DNXFER_QUIET);
2983 sel &= ~ATA_DNXFER_QUIET;
2985 xfer_mask = orig_mask = ata_pack_xfermask(dev->pio_mask,
2988 ata_unpack_xfermask(xfer_mask, &pio_mask, &mwdma_mask, &udma_mask);
2991 case ATA_DNXFER_PIO:
2992 highbit = fls(pio_mask) - 1;
2993 pio_mask &= ~(1 << highbit);
2996 case ATA_DNXFER_DMA:
2998 highbit = fls(udma_mask) - 1;
2999 udma_mask &= ~(1 << highbit);
3002 } else if (mwdma_mask) {
3003 highbit = fls(mwdma_mask) - 1;
3004 mwdma_mask &= ~(1 << highbit);
3010 case ATA_DNXFER_40C:
3011 udma_mask &= ATA_UDMA_MASK_40C;
3014 case ATA_DNXFER_FORCE_PIO0:
3016 case ATA_DNXFER_FORCE_PIO:
3025 xfer_mask &= ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask);
3027 if (!(xfer_mask & ATA_MASK_PIO) || xfer_mask == orig_mask)
3031 if (xfer_mask & (ATA_MASK_MWDMA | ATA_MASK_UDMA))
3032 snprintf(buf, sizeof(buf), "%s:%s",
3033 ata_mode_string(xfer_mask),
3034 ata_mode_string(xfer_mask & ATA_MASK_PIO));
3036 snprintf(buf, sizeof(buf), "%s",
3037 ata_mode_string(xfer_mask));
3039 ata_dev_printk(dev, KERN_WARNING,
3040 "limiting speed to %s\n", buf);
3043 ata_unpack_xfermask(xfer_mask, &dev->pio_mask, &dev->mwdma_mask,
3049 static int ata_dev_set_mode(struct ata_device *dev)
3051 struct ata_eh_context *ehc = &dev->link->eh_context;
3052 unsigned int err_mask;
3055 dev->flags &= ~ATA_DFLAG_PIO;
3056 if (dev->xfer_shift == ATA_SHIFT_PIO)
3057 dev->flags |= ATA_DFLAG_PIO;
3059 err_mask = ata_dev_set_xfermode(dev);
3061 /* Old CFA may refuse this command, which is just fine */
3062 if (dev->xfer_shift == ATA_SHIFT_PIO && ata_id_is_cfa(dev->id))
3063 err_mask &= ~AC_ERR_DEV;
3065 /* Some very old devices and some bad newer ones fail any kind of
3066 SET_XFERMODE request but support PIO0-2 timings and no IORDY */
3067 if (dev->xfer_shift == ATA_SHIFT_PIO && !ata_id_has_iordy(dev->id) &&
3068 dev->pio_mode <= XFER_PIO_2)
3069 err_mask &= ~AC_ERR_DEV;
3071 /* Early MWDMA devices do DMA but don't allow DMA mode setting.
3072 Don't fail an MWDMA0 set IFF the device indicates it is in MWDMA0 */
3073 if (dev->xfer_shift == ATA_SHIFT_MWDMA &&
3074 dev->dma_mode == XFER_MW_DMA_0 &&
3075 (dev->id[63] >> 8) & 1)
3076 err_mask &= ~AC_ERR_DEV;
3079 ata_dev_printk(dev, KERN_ERR, "failed to set xfermode "
3080 "(err_mask=0x%x)\n", err_mask);
3084 ehc->i.flags |= ATA_EHI_POST_SETMODE;
3085 rc = ata_dev_revalidate(dev, ATA_DEV_UNKNOWN, 0);
3086 ehc->i.flags &= ~ATA_EHI_POST_SETMODE;
3090 DPRINTK("xfer_shift=%u, xfer_mode=0x%x\n",
3091 dev->xfer_shift, (int)dev->xfer_mode);
3093 ata_dev_printk(dev, KERN_INFO, "configured for %s\n",
3094 ata_mode_string(ata_xfer_mode2mask(dev->xfer_mode)));
3099 * ata_do_set_mode - Program timings and issue SET FEATURES - XFER
3100 * @link: link on which timings will be programmed
3101 * @r_failed_dev: out paramter for failed device
3103 * Standard implementation of the function used to tune and set
3104 * ATA device disk transfer mode (PIO3, UDMA6, etc.). If
3105 * ata_dev_set_mode() fails, pointer to the failing device is
3106 * returned in @r_failed_dev.
3109 * PCI/etc. bus probe sem.
3112 * 0 on success, negative errno otherwise
3115 int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev)
3117 struct ata_port *ap = link->ap;
3118 struct ata_device *dev;
3119 int rc = 0, used_dma = 0, found = 0;
3121 /* step 1: calculate xfer_mask */
3122 ata_link_for_each_dev(dev, link) {
3123 unsigned long pio_mask, dma_mask;
3124 unsigned int mode_mask;
3126 if (!ata_dev_enabled(dev))
3129 mode_mask = ATA_DMA_MASK_ATA;
3130 if (dev->class == ATA_DEV_ATAPI)
3131 mode_mask = ATA_DMA_MASK_ATAPI;
3132 else if (ata_id_is_cfa(dev->id))
3133 mode_mask = ATA_DMA_MASK_CFA;
3135 ata_dev_xfermask(dev);
3137 pio_mask = ata_pack_xfermask(dev->pio_mask, 0, 0);
3138 dma_mask = ata_pack_xfermask(0, dev->mwdma_mask, dev->udma_mask);
3140 if (libata_dma_mask & mode_mask)
3141 dma_mask = ata_pack_xfermask(0, dev->mwdma_mask, dev->udma_mask);
3145 dev->pio_mode = ata_xfer_mask2mode(pio_mask);
3146 dev->dma_mode = ata_xfer_mask2mode(dma_mask);
3149 if (dev->dma_mode != 0xff)
3155 /* step 2: always set host PIO timings */
3156 ata_link_for_each_dev(dev, link) {
3157 if (!ata_dev_enabled(dev))
3160 if (dev->pio_mode == 0xff) {
3161 ata_dev_printk(dev, KERN_WARNING, "no PIO support\n");
3166 dev->xfer_mode = dev->pio_mode;
3167 dev->xfer_shift = ATA_SHIFT_PIO;
3168 if (ap->ops->set_piomode)
3169 ap->ops->set_piomode(ap, dev);
3172 /* step 3: set host DMA timings */
3173 ata_link_for_each_dev(dev, link) {
3174 if (!ata_dev_enabled(dev) || dev->dma_mode == 0xff)
3177 dev->xfer_mode = dev->dma_mode;
3178 dev->xfer_shift = ata_xfer_mode2shift(dev->dma_mode);
3179 if (ap->ops->set_dmamode)
3180 ap->ops->set_dmamode(ap, dev);
3183 /* step 4: update devices' xfer mode */
3184 ata_link_for_each_dev(dev, link) {
3185 /* don't update suspended devices' xfer mode */
3186 if (!ata_dev_enabled(dev))
3189 rc = ata_dev_set_mode(dev);
3194 /* Record simplex status. If we selected DMA then the other
3195 * host channels are not permitted to do so.
3197 if (used_dma && (ap->host->flags & ATA_HOST_SIMPLEX))
3198 ap->host->simplex_claimed = ap;
3202 *r_failed_dev = dev;
3207 * ata_tf_to_host - issue ATA taskfile to host controller
3208 * @ap: port to which command is being issued
3209 * @tf: ATA taskfile register set
3211 * Issues ATA taskfile register set to ATA host controller,
3212 * with proper synchronization with interrupt handler and
3216 * spin_lock_irqsave(host lock)
3219 static inline void ata_tf_to_host(struct ata_port *ap,
3220 const struct ata_taskfile *tf)
3222 ap->ops->tf_load(ap, tf);
3223 ap->ops->exec_command(ap, tf);
3227 * ata_busy_sleep - sleep until BSY clears, or timeout
3228 * @ap: port containing status register to be polled
3229 * @tmout_pat: impatience timeout
3230 * @tmout: overall timeout
3232 * Sleep until ATA Status register bit BSY clears,
3233 * or a timeout occurs.
3236 * Kernel thread context (may sleep).
3239 * 0 on success, -errno otherwise.
3241 int ata_busy_sleep(struct ata_port *ap,
3242 unsigned long tmout_pat, unsigned long tmout)
3244 unsigned long timer_start, timeout;
3247 status = ata_busy_wait(ap, ATA_BUSY, 300);
3248 timer_start = jiffies;
3249 timeout = timer_start + tmout_pat;
3250 while (status != 0xff && (status & ATA_BUSY) &&
3251 time_before(jiffies, timeout)) {
3253 status = ata_busy_wait(ap, ATA_BUSY, 3);
3256 if (status != 0xff && (status & ATA_BUSY))
3257 ata_port_printk(ap, KERN_WARNING,
3258 "port is slow to respond, please be patient "
3259 "(Status 0x%x)\n", status);
3261 timeout = timer_start + tmout;
3262 while (status != 0xff && (status & ATA_BUSY) &&
3263 time_before(jiffies, timeout)) {
3265 status = ata_chk_status(ap);
3271 if (status & ATA_BUSY) {
3272 ata_port_printk(ap, KERN_ERR, "port failed to respond "
3273 "(%lu secs, Status 0x%x)\n",
3274 tmout / HZ, status);
3282 * ata_wait_after_reset - wait before checking status after reset
3283 * @ap: port containing status register to be polled
3284 * @deadline: deadline jiffies for the operation
3286 * After reset, we need to pause a while before reading status.
3287 * Also, certain combination of controller and device report 0xff
3288 * for some duration (e.g. until SATA PHY is up and running)
3289 * which is interpreted as empty port in ATA world. This
3290 * function also waits for such devices to get out of 0xff
3294 * Kernel thread context (may sleep).
3296 void ata_wait_after_reset(struct ata_port *ap, unsigned long deadline)
3298 unsigned long until = jiffies + ATA_TMOUT_FF_WAIT;
3300 if (time_before(until, deadline))
3303 /* Spec mandates ">= 2ms" before checking status. We wait
3304 * 150ms, because that was the magic delay used for ATAPI
3305 * devices in Hale Landis's ATADRVR, for the period of time
3306 * between when the ATA command register is written, and then
3307 * status is checked. Because waiting for "a while" before
3308 * checking status is fine, post SRST, we perform this magic
3309 * delay here as well.
3311 * Old drivers/ide uses the 2mS rule and then waits for ready.
3315 /* Wait for 0xff to clear. Some SATA devices take a long time
3316 * to clear 0xff after reset. For example, HHD424020F7SV00
3317 * iVDR needs >= 800ms while. Quantum GoVault needs even more
3320 * Note that some PATA controllers (pata_ali) explode if
3321 * status register is read more than once when there's no
3324 if (ap->flags & ATA_FLAG_SATA) {
3326 u8 status = ata_chk_status(ap);
3328 if (status != 0xff || time_after(jiffies, deadline))
3337 * ata_wait_ready - sleep until BSY clears, or timeout
3338 * @ap: port containing status register to be polled
3339 * @deadline: deadline jiffies for the operation
3341 * Sleep until ATA Status register bit BSY clears, or timeout
3345 * Kernel thread context (may sleep).
3348 * 0 on success, -errno otherwise.
3350 int ata_wait_ready(struct ata_port *ap, unsigned long deadline)
3352 unsigned long start = jiffies;
3356 u8 status = ata_chk_status(ap);
3357 unsigned long now = jiffies;
3359 if (!(status & ATA_BUSY))
3361 if (!ata_link_online(&ap->link) && status == 0xff)
3363 if (time_after(now, deadline))
3366 if (!warned && time_after(now, start + 5 * HZ) &&
3367 (deadline - now > 3 * HZ)) {
3368 ata_port_printk(ap, KERN_WARNING,
3369 "port is slow to respond, please be patient "
3370 "(Status 0x%x)\n", status);
3378 static int ata_bus_post_reset(struct ata_port *ap, unsigned int devmask,
3379 unsigned long deadline)
3381 struct ata_ioports *ioaddr = &ap->ioaddr;
3382 unsigned int dev0 = devmask & (1 << 0);
3383 unsigned int dev1 = devmask & (1 << 1);
3386 /* if device 0 was found in ata_devchk, wait for its
3390 rc = ata_wait_ready(ap, deadline);
3398 /* if device 1 was found in ata_devchk, wait for register
3399 * access briefly, then wait for BSY to clear.
3404 ap->ops->dev_select(ap, 1);
3406 /* Wait for register access. Some ATAPI devices fail
3407 * to set nsect/lbal after reset, so don't waste too
3408 * much time on it. We're gonna wait for !BSY anyway.
3410 for (i = 0; i < 2; i++) {
3413 nsect = ioread8(ioaddr->nsect_addr);
3414 lbal = ioread8(ioaddr->lbal_addr);
3415 if ((nsect == 1) && (lbal == 1))
3417 msleep(50); /* give drive a breather */
3420 rc = ata_wait_ready(ap, deadline);
3428 /* is all this really necessary? */
3429 ap->ops->dev_select(ap, 0);
3431 ap->ops->dev_select(ap, 1);
3433 ap->ops->dev_select(ap, 0);
3438 static int ata_bus_softreset(struct ata_port *ap, unsigned int devmask,
3439 unsigned long deadline)
3441 struct ata_ioports *ioaddr = &ap->ioaddr;
3443 DPRINTK("ata%u: bus reset via SRST\n", ap->print_id);
3445 /* software reset. causes dev0 to be selected */
3446 iowrite8(ap->ctl, ioaddr->ctl_addr);
3447 udelay(20); /* FIXME: flush */
3448 iowrite8(ap->ctl | ATA_SRST, ioaddr->ctl_addr);
3449 udelay(20); /* FIXME: flush */
3450 iowrite8(ap->ctl, ioaddr->ctl_addr);
3452 /* wait a while before checking status */
3453 ata_wait_after_reset(ap, deadline);
3455 /* Before we perform post reset processing we want to see if
3456 * the bus shows 0xFF because the odd clown forgets the D7
3457 * pulldown resistor.
3459 if (ata_chk_status(ap) == 0xFF)
3462 return ata_bus_post_reset(ap, devmask, deadline);
3466 * ata_bus_reset - reset host port and associated ATA channel
3467 * @ap: port to reset
3469 * This is typically the first time we actually start issuing
3470 * commands to the ATA channel. We wait for BSY to clear, then
3471 * issue EXECUTE DEVICE DIAGNOSTIC command, polling for its
3472 * result. Determine what devices, if any, are on the channel
3473 * by looking at the device 0/1 error register. Look at the signature
3474 * stored in each device's taskfile registers, to determine if
3475 * the device is ATA or ATAPI.
3478 * PCI/etc. bus probe sem.
3479 * Obtains host lock.
3482 * Sets ATA_FLAG_DISABLED if bus reset fails.
3485 void ata_bus_reset(struct ata_port *ap)
3487 struct ata_device *device = ap->link.device;
3488 struct ata_ioports *ioaddr = &ap->ioaddr;
3489 unsigned int slave_possible = ap->flags & ATA_FLAG_SLAVE_POSS;
3491 unsigned int dev0, dev1 = 0, devmask = 0;
3494 DPRINTK("ENTER, host %u, port %u\n", ap->print_id, ap->port_no);
3496 /* determine if device 0/1 are present */
3497 if (ap->flags & ATA_FLAG_SATA_RESET)
3500 dev0 = ata_devchk(ap, 0);
3502 dev1 = ata_devchk(ap, 1);
3506 devmask |= (1 << 0);
3508 devmask |= (1 << 1);
3510 /* select device 0 again */
3511 ap->ops->dev_select(ap, 0);
3513 /* issue bus reset */
3514 if (ap->flags & ATA_FLAG_SRST) {
3515 rc = ata_bus_softreset(ap, devmask, jiffies + 40 * HZ);
3516 if (rc && rc != -ENODEV)
3521 * determine by signature whether we have ATA or ATAPI devices
3523 device[0].class = ata_dev_try_classify(&device[0], dev0, &err);
3524 if ((slave_possible) && (err != 0x81))
3525 device[1].class = ata_dev_try_classify(&device[1], dev1, &err);
3527 /* is double-select really necessary? */
3528 if (device[1].class != ATA_DEV_NONE)
3529 ap->ops->dev_select(ap, 1);
3530 if (device[0].class != ATA_DEV_NONE)
3531 ap->ops->dev_select(ap, 0);
3533 /* if no devices were detected, disable this port */
3534 if ((device[0].class == ATA_DEV_NONE) &&
3535 (device[1].class == ATA_DEV_NONE))
3538 if (ap->flags & (ATA_FLAG_SATA_RESET | ATA_FLAG_SRST)) {
3539 /* set up device control for ATA_FLAG_SATA_RESET */
3540 iowrite8(ap->ctl, ioaddr->ctl_addr);
3547 ata_port_printk(ap, KERN_ERR, "disabling port\n");
3548 ata_port_disable(ap);
3554 * sata_link_debounce - debounce SATA phy status
3555 * @link: ATA link to debounce SATA phy status for
3556 * @params: timing parameters { interval, duratinon, timeout } in msec
3557 * @deadline: deadline jiffies for the operation
3559 * Make sure SStatus of @link reaches stable state, determined by
3560 * holding the same value where DET is not 1 for @duration polled
3561 * every @interval, before @timeout. Timeout constraints the
3562 * beginning of the stable state. Because DET gets stuck at 1 on
3563 * some controllers after hot unplugging, this functions waits
3564 * until timeout then returns 0 if DET is stable at 1.
3566 * @timeout is further limited by @deadline. The sooner of the
3570 * Kernel thread context (may sleep)
3573 * 0 on success, -errno on failure.
3575 int sata_link_debounce(struct ata_link *link, const unsigned long *params,
3576 unsigned long deadline)
3578 unsigned long interval_msec = params[0];
3579 unsigned long duration = msecs_to_jiffies(params[1]);
3580 unsigned long last_jiffies, t;
3584 t = jiffies + msecs_to_jiffies(params[2]);
3585 if (time_before(t, deadline))
3588 if ((rc = sata_scr_read(link, SCR_STATUS, &cur)))
3593 last_jiffies = jiffies;
3596 msleep(interval_msec);
3597 if ((rc = sata_scr_read(link, SCR_STATUS, &cur)))
3603 if (cur == 1 && time_before(jiffies, deadline))
3605 if (time_after(jiffies, last_jiffies + duration))
3610 /* unstable, start over */
3612 last_jiffies = jiffies;
3614 /* Check deadline. If debouncing failed, return
3615 * -EPIPE to tell upper layer to lower link speed.
3617 if (time_after(jiffies, deadline))
3623 * sata_link_resume - resume SATA link
3624 * @link: ATA link to resume SATA
3625 * @params: timing parameters { interval, duratinon, timeout } in msec
3626 * @deadline: deadline jiffies for the operation
3628 * Resume SATA phy @link and debounce it.
3631 * Kernel thread context (may sleep)
3634 * 0 on success, -errno on failure.
3636 int sata_link_resume(struct ata_link *link, const unsigned long *params,
3637 unsigned long deadline)
3642 if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
3645 scontrol = (scontrol & 0x0f0) | 0x300;
3647 if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol)))
3650 /* Some PHYs react badly if SStatus is pounded immediately
3651 * after resuming. Delay 200ms before debouncing.
3655 return sata_link_debounce(link, params, deadline);
3659 * ata_std_prereset - prepare for reset
3660 * @link: ATA link to be reset
3661 * @deadline: deadline jiffies for the operation
3663 * @link is about to be reset. Initialize it. Failure from
3664 * prereset makes libata abort whole reset sequence and give up
3665 * that port, so prereset should be best-effort. It does its
3666 * best to prepare for reset sequence but if things go wrong, it
3667 * should just whine, not fail.
3670 * Kernel thread context (may sleep)
3673 * 0 on success, -errno otherwise.
3675 int ata_std_prereset(struct ata_link *link, unsigned long deadline)
3677 struct ata_port *ap = link->ap;
3678 struct ata_eh_context *ehc = &link->eh_context;
3679 const unsigned long *timing = sata_ehc_deb_timing(ehc);
3682 /* handle link resume */
3683 if ((ehc->i.flags & ATA_EHI_RESUME_LINK) &&
3684 (link->flags & ATA_LFLAG_HRST_TO_RESUME))
3685 ehc->i.action |= ATA_EH_HARDRESET;
3687 /* Some PMPs don't work with only SRST, force hardreset if PMP
3690 if (ap->flags & ATA_FLAG_PMP)
3691 ehc->i.action |= ATA_EH_HARDRESET;
3693 /* if we're about to do hardreset, nothing more to do */
3694 if (ehc->i.action & ATA_EH_HARDRESET)
3697 /* if SATA, resume link */
3698 if (ap->flags & ATA_FLAG_SATA) {
3699 rc = sata_link_resume(link, timing, deadline);
3700 /* whine about phy resume failure but proceed */
3701 if (rc && rc != -EOPNOTSUPP)
3702 ata_link_printk(link, KERN_WARNING, "failed to resume "
3703 "link for reset (errno=%d)\n", rc);
3706 /* Wait for !BSY if the controller can wait for the first D2H
3707 * Reg FIS and we don't know that no device is attached.
3709 if (!(link->flags & ATA_LFLAG_SKIP_D2H_BSY) && !ata_link_offline(link)) {
3710 rc = ata_wait_ready(ap, deadline);
3711 if (rc && rc != -ENODEV) {
3712 ata_link_printk(link, KERN_WARNING, "device not ready "
3713 "(errno=%d), forcing hardreset\n", rc);
3714 ehc->i.action |= ATA_EH_HARDRESET;
3722 * ata_std_softreset - reset host port via ATA SRST
3723 * @link: ATA link to reset
3724 * @classes: resulting classes of attached devices
3725 * @deadline: deadline jiffies for the operation
3727 * Reset host port using ATA SRST.
3730 * Kernel thread context (may sleep)
3733 * 0 on success, -errno otherwise.
3735 int ata_std_softreset(struct ata_link *link, unsigned int *classes,
3736 unsigned long deadline)
3738 struct ata_port *ap = link->ap;
3739 unsigned int slave_possible = ap->flags & ATA_FLAG_SLAVE_POSS;
3740 unsigned int devmask = 0;
3746 if (ata_link_offline(link)) {
3747 classes[0] = ATA_DEV_NONE;
3751 /* determine if device 0/1 are present */
3752 if (ata_devchk(ap, 0))
3753 devmask |= (1 << 0);
3754 if (slave_possible && ata_devchk(ap, 1))
3755 devmask |= (1 << 1);
3757 /* select device 0 again */
3758 ap->ops->dev_select(ap, 0);
3760 /* issue bus reset */
3761 DPRINTK("about to softreset, devmask=%x\n", devmask);
3762 rc = ata_bus_softreset(ap, devmask, deadline);
3763 /* if link is occupied, -ENODEV too is an error */
3764 if (rc && (rc != -ENODEV || sata_scr_valid(link))) {
3765 ata_link_printk(link, KERN_ERR, "SRST failed (errno=%d)\n", rc);
3769 /* determine by signature whether we have ATA or ATAPI devices */
3770 classes[0] = ata_dev_try_classify(&link->device[0],
3771 devmask & (1 << 0), &err);
3772 if (slave_possible && err != 0x81)
3773 classes[1] = ata_dev_try_classify(&link->device[1],
3774 devmask & (1 << 1), &err);
3777 DPRINTK("EXIT, classes[0]=%u [1]=%u\n", classes[0], classes[1]);
3782 * sata_link_hardreset - reset link via SATA phy reset
3783 * @link: link to reset
3784 * @timing: timing parameters { interval, duratinon, timeout } in msec
3785 * @deadline: deadline jiffies for the operation
3787 * SATA phy-reset @link using DET bits of SControl register.
3790 * Kernel thread context (may sleep)
3793 * 0 on success, -errno otherwise.
3795 int sata_link_hardreset(struct ata_link *link, const unsigned long *timing,
3796 unsigned long deadline)
3803 if (sata_set_spd_needed(link)) {
3804 /* SATA spec says nothing about how to reconfigure
3805 * spd. To be on the safe side, turn off phy during
3806 * reconfiguration. This works for at least ICH7 AHCI
3809 if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
3812 scontrol = (scontrol & 0x0f0) | 0x304;
3814 if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol)))
3820 /* issue phy wake/reset */
3821 if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
3824 scontrol = (scontrol & 0x0f0) | 0x301;
3826 if ((rc = sata_scr_write_flush(link, SCR_CONTROL, scontrol)))
3829 /* Couldn't find anything in SATA I/II specs, but AHCI-1.1
3830 * 10.4.2 says at least 1 ms.
3834 /* bring link back */
3835 rc = sata_link_resume(link, timing, deadline);
3837 DPRINTK("EXIT, rc=%d\n", rc);
3842 * sata_std_hardreset - reset host port via SATA phy reset
3843 * @link: link to reset
3844 * @class: resulting class of attached device
3845 * @deadline: deadline jiffies for the operation
3847 * SATA phy-reset host port using DET bits of SControl register,
3848 * wait for !BSY and classify the attached device.
3851 * Kernel thread context (may sleep)
3854 * 0 on success, -errno otherwise.
3856 int sata_std_hardreset(struct ata_link *link, unsigned int *class,
3857 unsigned long deadline)
3859 struct ata_port *ap = link->ap;
3860 const unsigned long *timing = sata_ehc_deb_timing(&link->eh_context);
3866 rc = sata_link_hardreset(link, timing, deadline);
3868 ata_link_printk(link, KERN_ERR,
3869 "COMRESET failed (errno=%d)\n", rc);
3873 /* TODO: phy layer with polling, timeouts, etc. */
3874 if (ata_link_offline(link)) {
3875 *class = ATA_DEV_NONE;
3876 DPRINTK("EXIT, link offline\n");
3880 /* wait a while before checking status */
3881 ata_wait_after_reset(ap, deadline);
3883 /* If PMP is supported, we have to do follow-up SRST. Note
3884 * that some PMPs don't send D2H Reg FIS after hardreset at
3885 * all if the first port is empty. Wait for it just for a
3886 * second and request follow-up SRST.
3888 if (ap->flags & ATA_FLAG_PMP) {
3889 ata_wait_ready(ap, jiffies + HZ);
3893 rc = ata_wait_ready(ap, deadline);
3894 /* link occupied, -ENODEV too is an error */
3896 ata_link_printk(link, KERN_ERR,
3897 "COMRESET failed (errno=%d)\n", rc);
3901 ap->ops->dev_select(ap, 0); /* probably unnecessary */
3903 *class = ata_dev_try_classify(link->device, 1, NULL);
3905 DPRINTK("EXIT, class=%u\n", *class);
3910 * ata_std_postreset - standard postreset callback
3911 * @link: the target ata_link
3912 * @classes: classes of attached devices
3914 * This function is invoked after a successful reset. Note that
3915 * the device might have been reset more than once using
3916 * different reset methods before postreset is invoked.
3919 * Kernel thread context (may sleep)
3921 void ata_std_postreset(struct ata_link *link, unsigned int *classes)
3923 struct ata_port *ap = link->ap;
3928 /* print link status */
3929 sata_print_link_status(link);
3932 if (sata_scr_read(link, SCR_ERROR, &serror) == 0)
3933 sata_scr_write(link, SCR_ERROR, serror);
3934 link->eh_info.serror = 0;
3936 /* is double-select really necessary? */
3937 if (classes[0] != ATA_DEV_NONE)
3938 ap->ops->dev_select(ap, 1);
3939 if (classes[1] != ATA_DEV_NONE)
3940 ap->ops->dev_select(ap, 0);
3942 /* bail out if no device is present */
3943 if (classes[0] == ATA_DEV_NONE && classes[1] == ATA_DEV_NONE) {
3944 DPRINTK("EXIT, no device\n");
3948 /* set up device control */
3949 if (ap->ioaddr.ctl_addr)
3950 iowrite8(ap->ctl, ap->ioaddr.ctl_addr);
3956 * ata_dev_same_device - Determine whether new ID matches configured device
3957 * @dev: device to compare against
3958 * @new_class: class of the new device
3959 * @new_id: IDENTIFY page of the new device
3961 * Compare @new_class and @new_id against @dev and determine
3962 * whether @dev is the device indicated by @new_class and
3969 * 1 if @dev matches @new_class and @new_id, 0 otherwise.
3971 static int ata_dev_same_device(struct ata_device *dev, unsigned int new_class,
3974 const u16 *old_id = dev->id;
3975 unsigned char model[2][ATA_ID_PROD_LEN + 1];
3976 unsigned char serial[2][ATA_ID_SERNO_LEN + 1];
3978 if (dev->class != new_class) {
3979 ata_dev_printk(dev, KERN_INFO, "class mismatch %d != %d\n",
3980 dev->class, new_class);
3984 ata_id_c_string(old_id, model[0], ATA_ID_PROD, sizeof(model[0]));
3985 ata_id_c_string(new_id, model[1], ATA_ID_PROD, sizeof(model[1]));
3986 ata_id_c_string(old_id, serial[0], ATA_ID_SERNO, sizeof(serial[0]));
3987 ata_id_c_string(new_id, serial[1], ATA_ID_SERNO, sizeof(serial[1]));
3989 if (strcmp(model[0], model[1])) {
3990 ata_dev_printk(dev, KERN_INFO, "model number mismatch "
3991 "'%s' != '%s'\n", model[0], model[1]);
3995 if (strcmp(serial[0], serial[1])) {
3996 ata_dev_printk(dev, KERN_INFO, "serial number mismatch "
3997 "'%s' != '%s'\n", serial[0], serial[1]);
4005 * ata_dev_reread_id - Re-read IDENTIFY data
4006 * @dev: target ATA device
4007 * @readid_flags: read ID flags
4009 * Re-read IDENTIFY page and make sure @dev is still attached to
4013 * Kernel thread context (may sleep)
4016 * 0 on success, negative errno otherwise
4018 int ata_dev_reread_id(struct ata_device *dev, unsigned int readid_flags)
4020 unsigned int class = dev->class;
4021 u16 *id = (void *)dev->link->ap->sector_buf;
4025 rc = ata_dev_read_id(dev, &class, readid_flags, id);
4029 /* is the device still there? */
4030 if (!ata_dev_same_device(dev, class, id))
4033 memcpy(dev->id, id, sizeof(id[0]) * ATA_ID_WORDS);
4038 * ata_dev_revalidate - Revalidate ATA device
4039 * @dev: device to revalidate
4040 * @new_class: new class code
4041 * @readid_flags: read ID flags
4043 * Re-read IDENTIFY page, make sure @dev is still attached to the
4044 * port and reconfigure it according to the new IDENTIFY page.
4047 * Kernel thread context (may sleep)
4050 * 0 on success, negative errno otherwise
4052 int ata_dev_revalidate(struct ata_device *dev, unsigned int new_class,
4053 unsigned int readid_flags)
4055 u64 n_sectors = dev->n_sectors;
4058 if (!ata_dev_enabled(dev))
4061 /* fail early if !ATA && !ATAPI to avoid issuing [P]IDENTIFY to PMP */
4062 if (ata_class_enabled(new_class) &&
4063 new_class != ATA_DEV_ATA && new_class != ATA_DEV_ATAPI) {
4064 ata_dev_printk(dev, KERN_INFO, "class mismatch %u != %u\n",
4065 dev->class, new_class);
4071 rc = ata_dev_reread_id(dev, readid_flags);
4075 /* configure device according to the new ID */
4076 rc = ata_dev_configure(dev);
4080 /* verify n_sectors hasn't changed */
4081 if (dev->class == ATA_DEV_ATA && n_sectors &&
4082 dev->n_sectors != n_sectors) {
4083 ata_dev_printk(dev, KERN_INFO, "n_sectors mismatch "
4085 (unsigned long long)n_sectors,
4086 (unsigned long long)dev->n_sectors);
4088 /* restore original n_sectors */
4089 dev->n_sectors = n_sectors;
4098 ata_dev_printk(dev, KERN_ERR, "revalidation failed (errno=%d)\n", rc);
4102 struct ata_blacklist_entry {
4103 const char *model_num;
4104 const char *model_rev;
4105 unsigned long horkage;
4108 static const struct ata_blacklist_entry ata_device_blacklist [] = {
4109 /* Devices with DMA related problems under Linux */
4110 { "WDC AC11000H", NULL, ATA_HORKAGE_NODMA },
4111 { "WDC AC22100H", NULL, ATA_HORKAGE_NODMA },
4112 { "WDC AC32500H", NULL, ATA_HORKAGE_NODMA },
4113 { "WDC AC33100H", NULL, ATA_HORKAGE_NODMA },
4114 { "WDC AC31600H", NULL, ATA_HORKAGE_NODMA },
4115 { "WDC AC32100H", "24.09P07", ATA_HORKAGE_NODMA },
4116 { "WDC AC23200L", "21.10N21", ATA_HORKAGE_NODMA },
4117 { "Compaq CRD-8241B", NULL, ATA_HORKAGE_NODMA },
4118 { "CRD-8400B", NULL, ATA_HORKAGE_NODMA },
4119 { "CRD-8480B", NULL, ATA_HORKAGE_NODMA },
4120 { "CRD-8482B", NULL, ATA_HORKAGE_NODMA },
4121 { "CRD-84", NULL, ATA_HORKAGE_NODMA },
4122 { "SanDisk SDP3B", NULL, ATA_HORKAGE_NODMA },
4123 { "SanDisk SDP3B-64", NULL, ATA_HORKAGE_NODMA },
4124 { "SANYO CD-ROM CRD", NULL, ATA_HORKAGE_NODMA },
4125 { "HITACHI CDR-8", NULL, ATA_HORKAGE_NODMA },
4126 { "HITACHI CDR-8335", NULL, ATA_HORKAGE_NODMA },
4127 { "HITACHI CDR-8435", NULL, ATA_HORKAGE_NODMA },
4128 { "Toshiba CD-ROM XM-6202B", NULL, ATA_HORKAGE_NODMA },
4129 { "TOSHIBA CD-ROM XM-1702BC", NULL, ATA_HORKAGE_NODMA },
4130 { "CD-532E-A", NULL, ATA_HORKAGE_NODMA },
4131 { "E-IDE CD-ROM CR-840",NULL, ATA_HORKAGE_NODMA },
4132 { "CD-ROM Drive/F5A", NULL, ATA_HORKAGE_NODMA },
4133 { "WPI CDD-820", NULL, ATA_HORKAGE_NODMA },
4134 { "SAMSUNG CD-ROM SC-148C", NULL, ATA_HORKAGE_NODMA },
4135 { "SAMSUNG CD-ROM SC", NULL, ATA_HORKAGE_NODMA },
4136 { "ATAPI CD-ROM DRIVE 40X MAXIMUM",NULL,ATA_HORKAGE_NODMA },
4137 { "_NEC DV5800A", NULL, ATA_HORKAGE_NODMA },
4138 { "SAMSUNG CD-ROM SN-124", "N001", ATA_HORKAGE_NODMA },
4139 { "Seagate STT20000A", NULL, ATA_HORKAGE_NODMA },
4140 /* Odd clown on sil3726/4726 PMPs */
4141 { "Config Disk", NULL, ATA_HORKAGE_NODMA |
4142 ATA_HORKAGE_SKIP_PM },
4144 /* Weird ATAPI devices */
4145 { "TORiSAN DVD-ROM DRD-N216", NULL, ATA_HORKAGE_MAX_SEC_128 },
4147 /* Devices we expect to fail diagnostics */
4149 /* Devices where NCQ should be avoided */
4151 { "WDC WD740ADFD-00", NULL, ATA_HORKAGE_NONCQ },
4152 { "WDC WD740ADFD-00NLR1", NULL, ATA_HORKAGE_NONCQ, },
4153 /* http://thread.gmane.org/gmane.linux.ide/14907 */
4154 { "FUJITSU MHT2060BH", NULL, ATA_HORKAGE_NONCQ },
4156 { "Maxtor *", "BANC*", ATA_HORKAGE_NONCQ },
4157 { "Maxtor 7V300F0", "VA111630", ATA_HORKAGE_NONCQ },
4158 { "HITACHI HDS7250SASUN500G*", NULL, ATA_HORKAGE_NONCQ },
4159 { "HITACHI HDS7225SBSUN250G*", NULL, ATA_HORKAGE_NONCQ },
4160 { "ST380817AS", "3.42", ATA_HORKAGE_NONCQ },
4161 { "ST3160023AS", "3.42", ATA_HORKAGE_NONCQ },
4163 /* Blacklist entries taken from Silicon Image 3124/3132
4164 Windows driver .inf file - also several Linux problem reports */
4165 { "HTS541060G9SA00", "MB3OC60D", ATA_HORKAGE_NONCQ, },
4166 { "HTS541080G9SA00", "MB4OC60D", ATA_HORKAGE_NONCQ, },
4167 { "HTS541010G9SA00", "MBZOC60D", ATA_HORKAGE_NONCQ, },
4169 /* devices which puke on READ_NATIVE_MAX */
4170 { "HDS724040KLSA80", "KFAOA20N", ATA_HORKAGE_BROKEN_HPA, },
4171 { "WDC WD3200JD-00KLB0", "WD-WCAMR1130137", ATA_HORKAGE_BROKEN_HPA },
4172 { "WDC WD2500JD-00HBB0", "WD-WMAL71490727", ATA_HORKAGE_BROKEN_HPA },
4173 { "MAXTOR 6L080L4", "A93.0500", ATA_HORKAGE_BROKEN_HPA },
4175 /* Devices which report 1 sector over size HPA */
4176 { "ST340823A", NULL, ATA_HORKAGE_HPA_SIZE, },
4177 { "ST320413A", NULL, ATA_HORKAGE_HPA_SIZE, },
4179 /* Devices which get the IVB wrong */
4180 { "QUANTUM FIREBALLlct10 05", "A03.0900", ATA_HORKAGE_IVB, },
4181 { "TSSTcorp CDDVDW SH-S202J", "SB00", ATA_HORKAGE_IVB, },
4182 { "TSSTcorp CDDVDW SH-S202J", "SB01", ATA_HORKAGE_IVB, },
4183 { "TSSTcorp CDDVDW SH-S202N", "SB00", ATA_HORKAGE_IVB, },
4184 { "TSSTcorp CDDVDW SH-S202N", "SB01", ATA_HORKAGE_IVB, },
4190 static int strn_pattern_cmp(const char *patt, const char *name, int wildchar)
4196 * check for trailing wildcard: *\0
4198 p = strchr(patt, wildchar);
4199 if (p && ((*(p + 1)) == 0))
4210 return strncmp(patt, name, len);
4213 static unsigned long ata_dev_blacklisted(const struct ata_device *dev)
4215 unsigned char model_num[ATA_ID_PROD_LEN + 1];
4216 unsigned char model_rev[ATA_ID_FW_REV_LEN + 1];
4217 const struct ata_blacklist_entry *ad = ata_device_blacklist;
4219 ata_id_c_string(dev->id, model_num, ATA_ID_PROD, sizeof(model_num));
4220 ata_id_c_string(dev->id, model_rev, ATA_ID_FW_REV, sizeof(model_rev));
4222 while (ad->model_num) {
4223 if (!strn_pattern_cmp(ad->model_num, model_num, '*')) {
4224 if (ad->model_rev == NULL)
4226 if (!strn_pattern_cmp(ad->model_rev, model_rev, '*'))
4234 static int ata_dma_blacklisted(const struct ata_device *dev)
4236 /* We don't support polling DMA.
4237 * DMA blacklist those ATAPI devices with CDB-intr (and use PIO)
4238 * if the LLDD handles only interrupts in the HSM_ST_LAST state.
4240 if ((dev->link->ap->flags & ATA_FLAG_PIO_POLLING) &&
4241 (dev->flags & ATA_DFLAG_CDB_INTR))
4243 return (dev->horkage & ATA_HORKAGE_NODMA) ? 1 : 0;
4247 * ata_is_40wire - check drive side detection
4250 * Perform drive side detection decoding, allowing for device vendors
4251 * who can't follow the documentation.
4254 static int ata_is_40wire(struct ata_device *dev)
4256 if (dev->horkage & ATA_HORKAGE_IVB)
4257 return ata_drive_40wire_relaxed(dev->id);
4258 return ata_drive_40wire(dev->id);
4262 * ata_dev_xfermask - Compute supported xfermask of the given device
4263 * @dev: Device to compute xfermask for
4265 * Compute supported xfermask of @dev and store it in
4266 * dev->*_mask. This function is responsible for applying all
4267 * known limits including host controller limits, device
4273 static void ata_dev_xfermask(struct ata_device *dev)
4275 struct ata_link *link = dev->link;
4276 struct ata_port *ap = link->ap;
4277 struct ata_host *host = ap->host;
4278 unsigned long xfer_mask;
4280 /* controller modes available */
4281 xfer_mask = ata_pack_xfermask(ap->pio_mask,
4282 ap->mwdma_mask, ap->udma_mask);
4284 /* drive modes available */
4285 xfer_mask &= ata_pack_xfermask(dev->pio_mask,
4286 dev->mwdma_mask, dev->udma_mask);
4287 xfer_mask &= ata_id_xfermask(dev->id);
4290 * CFA Advanced TrueIDE timings are not allowed on a shared
4293 if (ata_dev_pair(dev)) {
4294 /* No PIO5 or PIO6 */
4295 xfer_mask &= ~(0x03 << (ATA_SHIFT_PIO + 5));
4296 /* No MWDMA3 or MWDMA 4 */
4297 xfer_mask &= ~(0x03 << (ATA_SHIFT_MWDMA + 3));
4300 if (ata_dma_blacklisted(dev)) {
4301 xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA);
4302 ata_dev_printk(dev, KERN_WARNING,
4303 "device is on DMA blacklist, disabling DMA\n");
4306 if ((host->flags & ATA_HOST_SIMPLEX) &&
4307 host->simplex_claimed && host->simplex_claimed != ap) {
4308 xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA);
4309 ata_dev_printk(dev, KERN_WARNING, "simplex DMA is claimed by "
4310 "other device, disabling DMA\n");
4313 if (ap->flags & ATA_FLAG_NO_IORDY)
4314 xfer_mask &= ata_pio_mask_no_iordy(dev);
4316 if (ap->ops->mode_filter)
4317 xfer_mask = ap->ops->mode_filter(dev, xfer_mask);
4319 /* Apply cable rule here. Don't apply it early because when
4320 * we handle hot plug the cable type can itself change.
4321 * Check this last so that we know if the transfer rate was
4322 * solely limited by the cable.
4323 * Unknown or 80 wire cables reported host side are checked
4324 * drive side as well. Cases where we know a 40wire cable
4325 * is used safely for 80 are not checked here.
4327 if (xfer_mask & (0xF8 << ATA_SHIFT_UDMA))
4328 /* UDMA/44 or higher would be available */
4329 if ((ap->cbl == ATA_CBL_PATA40) ||
4330 (ata_is_40wire(dev) &&
4331 (ap->cbl == ATA_CBL_PATA_UNK ||
4332 ap->cbl == ATA_CBL_PATA80))) {
4333 ata_dev_printk(dev, KERN_WARNING,
4334 "limited to UDMA/33 due to 40-wire cable\n");
4335 xfer_mask &= ~(0xF8 << ATA_SHIFT_UDMA);
4338 ata_unpack_xfermask(xfer_mask, &dev->pio_mask,
4339 &dev->mwdma_mask, &dev->udma_mask);
4343 * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command
4344 * @dev: Device to which command will be sent
4346 * Issue SET FEATURES - XFER MODE command to device @dev
4350 * PCI/etc. bus probe sem.
4353 * 0 on success, AC_ERR_* mask otherwise.
4356 static unsigned int ata_dev_set_xfermode(struct ata_device *dev)
4358 struct ata_taskfile tf;
4359 unsigned int err_mask;
4361 /* set up set-features taskfile */
4362 DPRINTK("set features - xfer mode\n");
4364 /* Some controllers and ATAPI devices show flaky interrupt
4365 * behavior after setting xfer mode. Use polling instead.
4367 ata_tf_init(dev, &tf);
4368 tf.command = ATA_CMD_SET_FEATURES;
4369 tf.feature = SETFEATURES_XFER;
4370 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_POLLING;
4371 tf.protocol = ATA_PROT_NODATA;
4372 /* If we are using IORDY we must send the mode setting command */
4373 if (ata_pio_need_iordy(dev))
4374 tf.nsect = dev->xfer_mode;
4375 /* If the device has IORDY and the controller does not - turn it off */
4376 else if (ata_id_has_iordy(dev->id))
4378 else /* In the ancient relic department - skip all of this */
4381 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
4383 DPRINTK("EXIT, err_mask=%x\n", err_mask);
4387 * ata_dev_set_feature - Issue SET FEATURES - SATA FEATURES
4388 * @dev: Device to which command will be sent
4389 * @enable: Whether to enable or disable the feature
4390 * @feature: The sector count represents the feature to set
4392 * Issue SET FEATURES - SATA FEATURES command to device @dev
4393 * on port @ap with sector count
4396 * PCI/etc. bus probe sem.
4399 * 0 on success, AC_ERR_* mask otherwise.
4401 static unsigned int ata_dev_set_feature(struct ata_device *dev, u8 enable,
4404 struct ata_taskfile tf;
4405 unsigned int err_mask;
4407 /* set up set-features taskfile */
4408 DPRINTK("set features - SATA features\n");
4410 ata_tf_init(dev, &tf);
4411 tf.command = ATA_CMD_SET_FEATURES;
4412 tf.feature = enable;
4413 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
4414 tf.protocol = ATA_PROT_NODATA;
4417 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
4419 DPRINTK("EXIT, err_mask=%x\n", err_mask);
4424 * ata_dev_init_params - Issue INIT DEV PARAMS command
4425 * @dev: Device to which command will be sent
4426 * @heads: Number of heads (taskfile parameter)
4427 * @sectors: Number of sectors (taskfile parameter)
4430 * Kernel thread context (may sleep)
4433 * 0 on success, AC_ERR_* mask otherwise.
4435 static unsigned int ata_dev_init_params(struct ata_device *dev,
4436 u16 heads, u16 sectors)
4438 struct ata_taskfile tf;
4439 unsigned int err_mask;
4441 /* Number of sectors per track 1-255. Number of heads 1-16 */
4442 if (sectors < 1 || sectors > 255 || heads < 1 || heads > 16)
4443 return AC_ERR_INVALID;
4445 /* set up init dev params taskfile */
4446 DPRINTK("init dev params \n");
4448 ata_tf_init(dev, &tf);
4449 tf.command = ATA_CMD_INIT_DEV_PARAMS;
4450 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
4451 tf.protocol = ATA_PROT_NODATA;
4453 tf.device |= (heads - 1) & 0x0f; /* max head = num. of heads - 1 */
4455 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
4456 /* A clean abort indicates an original or just out of spec drive
4457 and we should continue as we issue the setup based on the
4458 drive reported working geometry */
4459 if (err_mask == AC_ERR_DEV && (tf.feature & ATA_ABORTED))
4462 DPRINTK("EXIT, err_mask=%x\n", err_mask);
4467 * ata_sg_clean - Unmap DMA memory associated with command
4468 * @qc: Command containing DMA memory to be released
4470 * Unmap all mapped DMA memory associated with this command.
4473 * spin_lock_irqsave(host lock)
4475 void ata_sg_clean(struct ata_queued_cmd *qc)
4477 struct ata_port *ap = qc->ap;
4478 struct scatterlist *sg = qc->sg;
4479 int dir = qc->dma_dir;
4480 void *pad_buf = NULL;
4482 WARN_ON(sg == NULL);
4484 VPRINTK("unmapping %u sg elements\n", qc->mapped_n_elem);
4486 /* if we padded the buffer out to 32-bit bound, and data
4487 * xfer direction is from-device, we must copy from the
4488 * pad buffer back into the supplied buffer
4490 if (qc->pad_len && !(qc->tf.flags & ATA_TFLAG_WRITE))
4491 pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ);
4493 if (qc->mapped_n_elem)
4494 dma_unmap_sg(ap->dev, sg, qc->mapped_n_elem, dir);
4495 /* restore last sg */
4497 *qc->last_sg = qc->saved_last_sg;
4499 struct scatterlist *psg = &qc->extra_sg[1];
4500 void *addr = kmap_atomic(sg_page(psg), KM_IRQ0);
4501 memcpy(addr + psg->offset, pad_buf, qc->pad_len);
4502 kunmap_atomic(addr, KM_IRQ0);
4505 qc->flags &= ~ATA_QCFLAG_DMAMAP;
4510 * ata_fill_sg - Fill PCI IDE PRD table
4511 * @qc: Metadata associated with taskfile to be transferred
4513 * Fill PCI IDE PRD (scatter-gather) table with segments
4514 * associated with the current disk command.
4517 * spin_lock_irqsave(host lock)
4520 static void ata_fill_sg(struct ata_queued_cmd *qc)
4522 struct ata_port *ap = qc->ap;
4523 struct scatterlist *sg;
4524 unsigned int si, pi;
4527 for_each_sg(qc->sg, sg, qc->n_elem, si) {
4531 /* determine if physical DMA addr spans 64K boundary.
4532 * Note h/w doesn't support 64-bit, so we unconditionally
4533 * truncate dma_addr_t to u32.
4535 addr = (u32) sg_dma_address(sg);
4536 sg_len = sg_dma_len(sg);
4539 offset = addr & 0xffff;
4541 if ((offset + sg_len) > 0x10000)
4542 len = 0x10000 - offset;
4544 ap->prd[pi].addr = cpu_to_le32(addr);
4545 ap->prd[pi].flags_len = cpu_to_le32(len & 0xffff);
4546 VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", pi, addr, len);
4554 ap->prd[pi - 1].flags_len |= cpu_to_le32(ATA_PRD_EOT);
4558 * ata_fill_sg_dumb - Fill PCI IDE PRD table
4559 * @qc: Metadata associated with taskfile to be transferred
4561 * Fill PCI IDE PRD (scatter-gather) table with segments
4562 * associated with the current disk command. Perform the fill
4563 * so that we avoid writing any length 64K records for
4564 * controllers that don't follow the spec.
4567 * spin_lock_irqsave(host lock)
4570 static void ata_fill_sg_dumb(struct ata_queued_cmd *qc)
4572 struct ata_port *ap = qc->ap;
4573 struct scatterlist *sg;
4574 unsigned int si, pi;
4577 for_each_sg(qc->sg, sg, qc->n_elem, si) {
4579 u32 sg_len, len, blen;
4581 /* determine if physical DMA addr spans 64K boundary.
4582 * Note h/w doesn't support 64-bit, so we unconditionally
4583 * truncate dma_addr_t to u32.
4585 addr = (u32) sg_dma_address(sg);
4586 sg_len = sg_dma_len(sg);
4589 offset = addr & 0xffff;
4591 if ((offset + sg_len) > 0x10000)
4592 len = 0x10000 - offset;
4594 blen = len & 0xffff;
4595 ap->prd[pi].addr = cpu_to_le32(addr);
4597 /* Some PATA chipsets like the CS5530 can't
4598 cope with 0x0000 meaning 64K as the spec says */
4599 ap->prd[pi].flags_len = cpu_to_le32(0x8000);
4601 ap->prd[++pi].addr = cpu_to_le32(addr + 0x8000);
4603 ap->prd[pi].flags_len = cpu_to_le32(blen);
4604 VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", pi, addr, len);
4612 ap->prd[pi - 1].flags_len |= cpu_to_le32(ATA_PRD_EOT);
4616 * ata_check_atapi_dma - Check whether ATAPI DMA can be supported
4617 * @qc: Metadata associated with taskfile to check
4619 * Allow low-level driver to filter ATA PACKET commands, returning
4620 * a status indicating whether or not it is OK to use DMA for the
4621 * supplied PACKET command.
4624 * spin_lock_irqsave(host lock)
4626 * RETURNS: 0 when ATAPI DMA can be used
4629 int ata_check_atapi_dma(struct ata_queued_cmd *qc)
4631 struct ata_port *ap = qc->ap;
4633 /* Don't allow DMA if it isn't multiple of 16 bytes. Quite a
4634 * few ATAPI devices choke on such DMA requests.
4636 if (unlikely(qc->nbytes & 15))
4639 if (ap->ops->check_atapi_dma)
4640 return ap->ops->check_atapi_dma(qc);
4646 * atapi_qc_may_overflow - Check whether data transfer may overflow
4647 * @qc: ATA command in question
4649 * ATAPI commands which transfer variable length data to host
4650 * might overflow due to application error or hardare bug. This
4651 * function checks whether overflow should be drained and ignored
4658 * 1 if @qc may overflow; otherwise, 0.
4660 static int atapi_qc_may_overflow(struct ata_queued_cmd *qc)
4662 if (qc->tf.protocol != ATAPI_PROT_PIO &&
4663 qc->tf.protocol != ATAPI_PROT_DMA)
4666 if (qc->tf.flags & ATA_TFLAG_WRITE)
4669 switch (qc->cdb[0]) {
4675 case GPCMD_READ_CD_MSF:
4683 * ata_std_qc_defer - Check whether a qc needs to be deferred
4684 * @qc: ATA command in question
4686 * Non-NCQ commands cannot run with any other command, NCQ or
4687 * not. As upper layer only knows the queue depth, we are
4688 * responsible for maintaining exclusion. This function checks
4689 * whether a new command @qc can be issued.
4692 * spin_lock_irqsave(host lock)
4695 * ATA_DEFER_* if deferring is needed, 0 otherwise.
4697 int ata_std_qc_defer(struct ata_queued_cmd *qc)
4699 struct ata_link *link = qc->dev->link;
4701 if (qc->tf.protocol == ATA_PROT_NCQ) {
4702 if (!ata_tag_valid(link->active_tag))
4705 if (!ata_tag_valid(link->active_tag) && !link->sactive)
4709 return ATA_DEFER_LINK;
4713 * ata_qc_prep - Prepare taskfile for submission
4714 * @qc: Metadata associated with taskfile to be prepared
4716 * Prepare ATA taskfile for submission.
4719 * spin_lock_irqsave(host lock)
4721 void ata_qc_prep(struct ata_queued_cmd *qc)
4723 if (!(qc->flags & ATA_QCFLAG_DMAMAP))
4730 * ata_dumb_qc_prep - Prepare taskfile for submission
4731 * @qc: Metadata associated with taskfile to be prepared
4733 * Prepare ATA taskfile for submission.
4736 * spin_lock_irqsave(host lock)
4738 void ata_dumb_qc_prep(struct ata_queued_cmd *qc)
4740 if (!(qc->flags & ATA_QCFLAG_DMAMAP))
4743 ata_fill_sg_dumb(qc);
4746 void ata_noop_qc_prep(struct ata_queued_cmd *qc) { }
4749 * ata_sg_init - Associate command with scatter-gather table.
4750 * @qc: Command to be associated
4751 * @sg: Scatter-gather table.
4752 * @n_elem: Number of elements in s/g table.
4754 * Initialize the data-related elements of queued_cmd @qc
4755 * to point to a scatter-gather table @sg, containing @n_elem
4759 * spin_lock_irqsave(host lock)
4761 void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
4762 unsigned int n_elem)
4765 qc->n_elem = n_elem;
4769 static unsigned int ata_sg_setup_extra(struct ata_queued_cmd *qc,
4770 unsigned int *n_elem_extra,
4771 unsigned int *nbytes_extra)
4773 struct ata_port *ap = qc->ap;
4774 unsigned int n_elem = qc->n_elem;
4775 struct scatterlist *lsg, *copy_lsg = NULL, *tsg = NULL, *esg = NULL;
4780 /* needs padding? */
4781 qc->pad_len = qc->nbytes & 3;
4783 if (likely(!qc->pad_len))
4786 /* locate last sg and save it */
4787 lsg = sg_last(qc->sg, n_elem);
4789 qc->saved_last_sg = *lsg;
4791 sg_init_table(qc->extra_sg, ARRAY_SIZE(qc->extra_sg));
4794 struct scatterlist *psg = &qc->extra_sg[1];
4795 void *pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ);
4796 unsigned int offset;
4798 WARN_ON(qc->dev->class != ATA_DEV_ATAPI);
4800 memset(pad_buf, 0, ATA_DMA_PAD_SZ);
4802 /* psg->page/offset are used to copy to-be-written
4803 * data in this function or read data in ata_sg_clean.
4805 offset = lsg->offset + lsg->length - qc->pad_len;
4806 sg_set_page(psg, nth_page(sg_page(lsg), offset >> PAGE_SHIFT),
4807 qc->pad_len, offset_in_page(offset));
4809 if (qc->tf.flags & ATA_TFLAG_WRITE) {
4810 void *addr = kmap_atomic(sg_page(psg), KM_IRQ0);
4811 memcpy(pad_buf, addr + psg->offset, qc->pad_len);
4812 kunmap_atomic(addr, KM_IRQ0);
4815 sg_dma_address(psg) = ap->pad_dma + (qc->tag * ATA_DMA_PAD_SZ);
4816 sg_dma_len(psg) = ATA_DMA_PAD_SZ;
4818 /* Trim the last sg entry and chain the original and
4821 * Because chaining consumes one sg entry, one extra
4822 * sg entry is allocated and the last sg entry is
4823 * copied to it if the length isn't zero after padded
4824 * amount is removed.
4826 * If the last sg entry is completely replaced by
4827 * padding sg entry, the first sg entry is skipped
4830 lsg->length -= qc->pad_len;
4832 copy_lsg = &qc->extra_sg[0];
4833 tsg = &qc->extra_sg[0];
4836 tsg = &qc->extra_sg[1];
4839 esg = &qc->extra_sg[1];
4842 (*nbytes_extra) += 4 - qc->pad_len;
4846 sg_set_page(copy_lsg, sg_page(lsg), lsg->length, lsg->offset);
4848 sg_chain(lsg, 1, tsg);
4851 /* sglist can't start with chaining sg entry, fast forward */
4852 if (qc->sg == lsg) {
4861 * ata_sg_setup - DMA-map the scatter-gather table associated with a command.
4862 * @qc: Command with scatter-gather table to be mapped.
4864 * DMA-map the scatter-gather table associated with queued_cmd @qc.
4867 * spin_lock_irqsave(host lock)
4870 * Zero on success, negative on error.
4873 static int ata_sg_setup(struct ata_queued_cmd *qc)
4875 struct ata_port *ap = qc->ap;
4876 unsigned int n_elem, n_elem_extra, nbytes_extra;
4878 VPRINTK("ENTER, ata%u\n", ap->print_id);
4880 n_elem = ata_sg_setup_extra(qc, &n_elem_extra, &nbytes_extra);
4883 n_elem = dma_map_sg(ap->dev, qc->sg, n_elem, qc->dma_dir);
4885 /* restore last sg */
4887 *qc->last_sg = qc->saved_last_sg;
4890 DPRINTK("%d sg elements mapped\n", n_elem);
4893 qc->n_elem = qc->mapped_n_elem = n_elem;
4894 qc->n_elem += n_elem_extra;
4895 qc->nbytes += nbytes_extra;
4896 qc->flags |= ATA_QCFLAG_DMAMAP;
4902 * swap_buf_le16 - swap halves of 16-bit words in place
4903 * @buf: Buffer to swap
4904 * @buf_words: Number of 16-bit words in buffer.
4906 * Swap halves of 16-bit words if needed to convert from
4907 * little-endian byte order to native cpu byte order, or
4911 * Inherited from caller.
4913 void swap_buf_le16(u16 *buf, unsigned int buf_words)
4918 for (i = 0; i < buf_words; i++)
4919 buf[i] = le16_to_cpu(buf[i]);
4920 #endif /* __BIG_ENDIAN */
4924 * ata_data_xfer - Transfer data by PIO
4925 * @dev: device to target
4927 * @buflen: buffer length
4928 * @write_data: read/write
4930 * Transfer data from/to the device data register by PIO.
4933 * Inherited from caller.
4938 unsigned int ata_data_xfer(struct ata_device *dev, unsigned char *buf,
4939 unsigned int buflen, int rw)
4941 struct ata_port *ap = dev->link->ap;
4942 void __iomem *data_addr = ap->ioaddr.data_addr;
4943 unsigned int words = buflen >> 1;
4945 /* Transfer multiple of 2 bytes */
4947 ioread16_rep(data_addr, buf, words);
4949 iowrite16_rep(data_addr, buf, words);
4951 /* Transfer trailing 1 byte, if any. */
4952 if (unlikely(buflen & 0x01)) {
4953 u16 align_buf[1] = { 0 };
4954 unsigned char *trailing_buf = buf + buflen - 1;
4957 align_buf[0] = cpu_to_le16(ioread16(data_addr));
4958 memcpy(trailing_buf, align_buf, 1);
4960 memcpy(align_buf, trailing_buf, 1);
4961 iowrite16(le16_to_cpu(align_buf[0]), data_addr);
4970 * ata_data_xfer_noirq - Transfer data by PIO
4971 * @dev: device to target
4973 * @buflen: buffer length
4974 * @write_data: read/write
4976 * Transfer data from/to the device data register by PIO. Do the
4977 * transfer with interrupts disabled.
4980 * Inherited from caller.
4985 unsigned int ata_data_xfer_noirq(struct ata_device *dev, unsigned char *buf,
4986 unsigned int buflen, int rw)
4988 unsigned long flags;
4989 unsigned int consumed;
4991 local_irq_save(flags);
4992 consumed = ata_data_xfer(dev, buf, buflen, rw);
4993 local_irq_restore(flags);
5000 * ata_pio_sector - Transfer a sector of data.
5001 * @qc: Command on going
5003 * Transfer qc->sect_size bytes of data from/to the ATA device.
5006 * Inherited from caller.
5009 static void ata_pio_sector(struct ata_queued_cmd *qc)
5011 int do_write = (qc->tf.flags & ATA_TFLAG_WRITE);
5012 struct ata_port *ap = qc->ap;
5014 unsigned int offset;
5017 if (qc->curbytes == qc->nbytes - qc->sect_size)
5018 ap->hsm_task_state = HSM_ST_LAST;
5020 page = sg_page(qc->cursg);
5021 offset = qc->cursg->offset + qc->cursg_ofs;
5023 /* get the current page and offset */
5024 page = nth_page(page, (offset >> PAGE_SHIFT));
5025 offset %= PAGE_SIZE;
5027 DPRINTK("data %s\n", qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read");
5029 if (PageHighMem(page)) {
5030 unsigned long flags;
5032 /* FIXME: use a bounce buffer */
5033 local_irq_save(flags);
5034 buf = kmap_atomic(page, KM_IRQ0);
5036 /* do the actual data transfer */
5037 ap->ops->data_xfer(qc->dev, buf + offset, qc->sect_size, do_write);
5039 kunmap_atomic(buf, KM_IRQ0);
5040 local_irq_restore(flags);
5042 buf = page_address(page);
5043 ap->ops->data_xfer(qc->dev, buf + offset, qc->sect_size, do_write);
5046 qc->curbytes += qc->sect_size;
5047 qc->cursg_ofs += qc->sect_size;
5049 if (qc->cursg_ofs == qc->cursg->length) {
5050 qc->cursg = sg_next(qc->cursg);
5056 * ata_pio_sectors - Transfer one or many sectors.
5057 * @qc: Command on going
5059 * Transfer one or many sectors of data from/to the
5060 * ATA device for the DRQ request.
5063 * Inherited from caller.
5066 static void ata_pio_sectors(struct ata_queued_cmd *qc)
5068 if (is_multi_taskfile(&qc->tf)) {
5069 /* READ/WRITE MULTIPLE */
5072 WARN_ON(qc->dev->multi_count == 0);
5074 nsect = min((qc->nbytes - qc->curbytes) / qc->sect_size,
5075 qc->dev->multi_count);
5081 ata_altstatus(qc->ap); /* flush */
5085 * atapi_send_cdb - Write CDB bytes to hardware
5086 * @ap: Port to which ATAPI device is attached.
5087 * @qc: Taskfile currently active
5089 * When device has indicated its readiness to accept
5090 * a CDB, this function is called. Send the CDB.
5096 static void atapi_send_cdb(struct ata_port *ap, struct ata_queued_cmd *qc)
5099 DPRINTK("send cdb\n");
5100 WARN_ON(qc->dev->cdb_len < 12);
5102 ap->ops->data_xfer(qc->dev, qc->cdb, qc->dev->cdb_len, 1);
5103 ata_altstatus(ap); /* flush */
5105 switch (qc->tf.protocol) {
5106 case ATAPI_PROT_PIO:
5107 ap->hsm_task_state = HSM_ST;
5109 case ATAPI_PROT_NODATA:
5110 ap->hsm_task_state = HSM_ST_LAST;
5112 case ATAPI_PROT_DMA:
5113 ap->hsm_task_state = HSM_ST_LAST;
5114 /* initiate bmdma */
5115 ap->ops->bmdma_start(qc);
5121 * __atapi_pio_bytes - Transfer data from/to the ATAPI device.
5122 * @qc: Command on going
5123 * @bytes: number of bytes
5125 * Transfer Transfer data from/to the ATAPI device.
5128 * Inherited from caller.
5131 static int __atapi_pio_bytes(struct ata_queued_cmd *qc, unsigned int bytes)
5133 int do_write = (qc->tf.flags & ATA_TFLAG_WRITE);
5134 struct ata_port *ap = qc->ap;
5135 struct ata_eh_info *ehi = &qc->dev->link->eh_info;
5136 struct scatterlist *sg;
5139 unsigned int offset, count;
5143 if (unlikely(!sg)) {
5145 * The end of qc->sg is reached and the device expects
5146 * more data to transfer. In order not to overrun qc->sg
5147 * and fulfill length specified in the byte count register,
5148 * - for read case, discard trailing data from the device
5149 * - for write case, padding zero data to the device
5151 u16 pad_buf[1] = { 0 };
5154 if (bytes > qc->curbytes - qc->nbytes + ATAPI_MAX_DRAIN) {
5155 ata_ehi_push_desc(ehi, "too much trailing data "
5156 "buf=%u cur=%u bytes=%u",
5157 qc->nbytes, qc->curbytes, bytes);
5161 /* overflow is exptected for misc ATAPI commands */
5162 if (bytes && !atapi_qc_may_overflow(qc))
5163 ata_dev_printk(qc->dev, KERN_WARNING, "ATAPI %u bytes "
5164 "trailing data (cdb=%02x nbytes=%u)\n",
5165 bytes, qc->cdb[0], qc->nbytes);
5167 for (i = 0; i < (bytes + 1) / 2; i++)
5168 ap->ops->data_xfer(qc->dev, (unsigned char *)pad_buf, 2, do_write);
5170 qc->curbytes += bytes;
5176 offset = sg->offset + qc->cursg_ofs;
5178 /* get the current page and offset */
5179 page = nth_page(page, (offset >> PAGE_SHIFT));
5180 offset %= PAGE_SIZE;
5182 /* don't overrun current sg */
5183 count = min(sg->length - qc->cursg_ofs, bytes);
5185 /* don't cross page boundaries */
5186 count = min(count, (unsigned int)PAGE_SIZE - offset);
5188 DPRINTK("data %s\n", qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read");
5190 if (PageHighMem(page)) {
5191 unsigned long flags;
5193 /* FIXME: use bounce buffer */
5194 local_irq_save(flags);
5195 buf = kmap_atomic(page, KM_IRQ0);
5197 /* do the actual data transfer */
5198 ap->ops->data_xfer(qc->dev, buf + offset, count, do_write);
5200 kunmap_atomic(buf, KM_IRQ0);
5201 local_irq_restore(flags);
5203 buf = page_address(page);
5204 ap->ops->data_xfer(qc->dev, buf + offset, count, do_write);
5208 if ((count & 1) && bytes)
5210 qc->curbytes += count;
5211 qc->cursg_ofs += count;
5213 if (qc->cursg_ofs == sg->length) {
5214 qc->cursg = sg_next(qc->cursg);
5225 * atapi_pio_bytes - Transfer data from/to the ATAPI device.
5226 * @qc: Command on going
5228 * Transfer Transfer data from/to the ATAPI device.
5231 * Inherited from caller.
5234 static void atapi_pio_bytes(struct ata_queued_cmd *qc)
5236 struct ata_port *ap = qc->ap;
5237 struct ata_device *dev = qc->dev;
5238 unsigned int ireason, bc_lo, bc_hi, bytes;
5239 int i_write, do_write = (qc->tf.flags & ATA_TFLAG_WRITE) ? 1 : 0;
5241 /* Abuse qc->result_tf for temp storage of intermediate TF
5242 * here to save some kernel stack usage.
5243 * For normal completion, qc->result_tf is not relevant. For
5244 * error, qc->result_tf is later overwritten by ata_qc_complete().
5245 * So, the correctness of qc->result_tf is not affected.
5247 ap->ops->tf_read(ap, &qc->result_tf);
5248 ireason = qc->result_tf.nsect;
5249 bc_lo = qc->result_tf.lbam;
5250 bc_hi = qc->result_tf.lbah;
5251 bytes = (bc_hi << 8) | bc_lo;
5253 /* shall be cleared to zero, indicating xfer of data */
5254 if (unlikely(ireason & (1 << 0)))
5257 /* make sure transfer direction matches expected */
5258 i_write = ((ireason & (1 << 1)) == 0) ? 1 : 0;
5259 if (unlikely(do_write != i_write))
5262 if (unlikely(!bytes))
5265 VPRINTK("ata%u: xfering %d bytes\n", ap->print_id, bytes);
5267 if (__atapi_pio_bytes(qc, bytes))
5269 ata_altstatus(ap); /* flush */
5274 ata_dev_printk(dev, KERN_INFO, "ATAPI check failed\n");
5275 qc->err_mask |= AC_ERR_HSM;
5276 ap->hsm_task_state = HSM_ST_ERR;
5280 * ata_hsm_ok_in_wq - Check if the qc can be handled in the workqueue.
5281 * @ap: the target ata_port
5285 * 1 if ok in workqueue, 0 otherwise.
5288 static inline int ata_hsm_ok_in_wq(struct ata_port *ap, struct ata_queued_cmd *qc)
5290 if (qc->tf.flags & ATA_TFLAG_POLLING)
5293 if (ap->hsm_task_state == HSM_ST_FIRST) {
5294 if (qc->tf.protocol == ATA_PROT_PIO &&
5295 (qc->tf.flags & ATA_TFLAG_WRITE))
5298 if (ata_is_atapi(qc->tf.protocol) &&
5299 !(qc->dev->flags & ATA_DFLAG_CDB_INTR))
5307 * ata_hsm_qc_complete - finish a qc running on standard HSM
5308 * @qc: Command to complete
5309 * @in_wq: 1 if called from workqueue, 0 otherwise
5311 * Finish @qc which is running on standard HSM.
5314 * If @in_wq is zero, spin_lock_irqsave(host lock).
5315 * Otherwise, none on entry and grabs host lock.
5317 static void ata_hsm_qc_complete(struct ata_queued_cmd *qc, int in_wq)
5319 struct ata_port *ap = qc->ap;
5320 unsigned long flags;
5322 if (ap->ops->error_handler) {
5324 spin_lock_irqsave(ap->lock, flags);
5326 /* EH might have kicked in while host lock is
5329 qc = ata_qc_from_tag(ap, qc->tag);
5331 if (likely(!(qc->err_mask & AC_ERR_HSM))) {
5332 ap->ops->irq_on(ap);
5333 ata_qc_complete(qc);
5335 ata_port_freeze(ap);
5338 spin_unlock_irqrestore(ap->lock, flags);
5340 if (likely(!(qc->err_mask & AC_ERR_HSM)))
5341 ata_qc_complete(qc);
5343 ata_port_freeze(ap);
5347 spin_lock_irqsave(ap->lock, flags);
5348 ap->ops->irq_on(ap);
5349 ata_qc_complete(qc);
5350 spin_unlock_irqrestore(ap->lock, flags);
5352 ata_qc_complete(qc);
5357 * ata_hsm_move - move the HSM to the next state.
5358 * @ap: the target ata_port
5360 * @status: current device status
5361 * @in_wq: 1 if called from workqueue, 0 otherwise
5364 * 1 when poll next status needed, 0 otherwise.
5366 int ata_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc,
5367 u8 status, int in_wq)
5369 unsigned long flags = 0;
5372 WARN_ON((qc->flags & ATA_QCFLAG_ACTIVE) == 0);
5374 /* Make sure ata_qc_issue_prot() does not throw things
5375 * like DMA polling into the workqueue. Notice that
5376 * in_wq is not equivalent to (qc->tf.flags & ATA_TFLAG_POLLING).
5378 WARN_ON(in_wq != ata_hsm_ok_in_wq(ap, qc));
5381 DPRINTK("ata%u: protocol %d task_state %d (dev_stat 0x%X)\n",
5382 ap->print_id, qc->tf.protocol, ap->hsm_task_state, status);
5384 switch (ap->hsm_task_state) {
5386 /* Send first data block or PACKET CDB */
5388 /* If polling, we will stay in the work queue after
5389 * sending the data. Otherwise, interrupt handler
5390 * takes over after sending the data.
5392 poll_next = (qc->tf.flags & ATA_TFLAG_POLLING);
5394 /* check device status */
5395 if (unlikely((status & ATA_DRQ) == 0)) {
5396 /* handle BSY=0, DRQ=0 as error */
5397 if (likely(status & (ATA_ERR | ATA_DF)))
5398 /* device stops HSM for abort/error */
5399 qc->err_mask |= AC_ERR_DEV;
5401 /* HSM violation. Let EH handle this */
5402 qc->err_mask |= AC_ERR_HSM;
5404 ap->hsm_task_state = HSM_ST_ERR;
5408 /* Device should not ask for data transfer (DRQ=1)
5409 * when it finds something wrong.
5410 * We ignore DRQ here and stop the HSM by
5411 * changing hsm_task_state to HSM_ST_ERR and
5412 * let the EH abort the command or reset the device.
5414 if (unlikely(status & (ATA_ERR | ATA_DF))) {
5415 /* Some ATAPI tape drives forget to clear the ERR bit
5416 * when doing the next command (mostly request sense).
5417 * We ignore ERR here to workaround and proceed sending
5420 if (!(qc->dev->horkage & ATA_HORKAGE_STUCK_ERR)) {
5421 ata_port_printk(ap, KERN_WARNING,
5422 "DRQ=1 with device error, "
5423 "dev_stat 0x%X\n", status);
5424 qc->err_mask |= AC_ERR_HSM;
5425 ap->hsm_task_state = HSM_ST_ERR;
5430 /* Send the CDB (atapi) or the first data block (ata pio out).
5431 * During the state transition, interrupt handler shouldn't
5432 * be invoked before the data transfer is complete and
5433 * hsm_task_state is changed. Hence, the following locking.
5436 spin_lock_irqsave(ap->lock, flags);
5438 if (qc->tf.protocol == ATA_PROT_PIO) {
5439 /* PIO data out protocol.
5440 * send first data block.
5443 /* ata_pio_sectors() might change the state
5444 * to HSM_ST_LAST. so, the state is changed here
5445 * before ata_pio_sectors().
5447 ap->hsm_task_state = HSM_ST;
5448 ata_pio_sectors(qc);
5451 atapi_send_cdb(ap, qc);
5454 spin_unlock_irqrestore(ap->lock, flags);
5456 /* if polling, ata_pio_task() handles the rest.
5457 * otherwise, interrupt handler takes over from here.
5462 /* complete command or read/write the data register */
5463 if (qc->tf.protocol == ATAPI_PROT_PIO) {
5464 /* ATAPI PIO protocol */
5465 if ((status & ATA_DRQ) == 0) {
5466 /* No more data to transfer or device error.
5467 * Device error will be tagged in HSM_ST_LAST.
5469 ap->hsm_task_state = HSM_ST_LAST;
5473 /* Device should not ask for data transfer (DRQ=1)
5474 * when it finds something wrong.
5475 * We ignore DRQ here and stop the HSM by
5476 * changing hsm_task_state to HSM_ST_ERR and
5477 * let the EH abort the command or reset the device.
5479 if (unlikely(status & (ATA_ERR | ATA_DF))) {
5480 ata_port_printk(ap, KERN_WARNING, "DRQ=1 with "
5481 "device error, dev_stat 0x%X\n",
5483 qc->err_mask |= AC_ERR_HSM;
5484 ap->hsm_task_state = HSM_ST_ERR;
5488 atapi_pio_bytes(qc);
5490 if (unlikely(ap->hsm_task_state == HSM_ST_ERR))
5491 /* bad ireason reported by device */
5495 /* ATA PIO protocol */
5496 if (unlikely((status & ATA_DRQ) == 0)) {
5497 /* handle BSY=0, DRQ=0 as error */
5498 if (likely(status & (ATA_ERR | ATA_DF)))
5499 /* device stops HSM for abort/error */
5500 qc->err_mask |= AC_ERR_DEV;
5502 /* HSM violation. Let EH handle this.
5503 * Phantom devices also trigger this
5504 * condition. Mark hint.
5506 qc->err_mask |= AC_ERR_HSM |
5509 ap->hsm_task_state = HSM_ST_ERR;
5513 /* For PIO reads, some devices may ask for
5514 * data transfer (DRQ=1) alone with ERR=1.
5515 * We respect DRQ here and transfer one
5516 * block of junk data before changing the
5517 * hsm_task_state to HSM_ST_ERR.
5519 * For PIO writes, ERR=1 DRQ=1 doesn't make
5520 * sense since the data block has been
5521 * transferred to the device.
5523 if (unlikely(status & (ATA_ERR | ATA_DF))) {
5524 /* data might be corrputed */
5525 qc->err_mask |= AC_ERR_DEV;
5527 if (!(qc->tf.flags & ATA_TFLAG_WRITE)) {
5528 ata_pio_sectors(qc);
5529 status = ata_wait_idle(ap);
5532 if (status & (ATA_BUSY | ATA_DRQ))
5533 qc->err_mask |= AC_ERR_HSM;
5535 /* ata_pio_sectors() might change the
5536 * state to HSM_ST_LAST. so, the state
5537 * is changed after ata_pio_sectors().
5539 ap->hsm_task_state = HSM_ST_ERR;
5543 ata_pio_sectors(qc);
5545 if (ap->hsm_task_state == HSM_ST_LAST &&
5546 (!(qc->tf.flags & ATA_TFLAG_WRITE))) {
5548 status = ata_wait_idle(ap);
5557 if (unlikely(!ata_ok(status))) {
5558 qc->err_mask |= __ac_err_mask(status);
5559 ap->hsm_task_state = HSM_ST_ERR;
5563 /* no more data to transfer */
5564 DPRINTK("ata%u: dev %u command complete, drv_stat 0x%x\n",
5565 ap->print_id, qc->dev->devno, status);
5567 WARN_ON(qc->err_mask);
5569 ap->hsm_task_state = HSM_ST_IDLE;
5571 /* complete taskfile transaction */
5572 ata_hsm_qc_complete(qc, in_wq);
5578 /* make sure qc->err_mask is available to
5579 * know what's wrong and recover
5581 WARN_ON(qc->err_mask == 0);
5583 ap->hsm_task_state = HSM_ST_IDLE;
5585 /* complete taskfile transaction */
5586 ata_hsm_qc_complete(qc, in_wq);
5598 static void ata_pio_task(struct work_struct *work)
5600 struct ata_port *ap =
5601 container_of(work, struct ata_port, port_task.work);
5602 struct ata_queued_cmd *qc = ap->port_task_data;
5607 WARN_ON(ap->hsm_task_state == HSM_ST_IDLE);
5610 * This is purely heuristic. This is a fast path.
5611 * Sometimes when we enter, BSY will be cleared in
5612 * a chk-status or two. If not, the drive is probably seeking
5613 * or something. Snooze for a couple msecs, then
5614 * chk-status again. If still busy, queue delayed work.
5616 status = ata_busy_wait(ap, ATA_BUSY, 5);
5617 if (status & ATA_BUSY) {
5619 status = ata_busy_wait(ap, ATA_BUSY, 10);
5620 if (status & ATA_BUSY) {
5621 ata_port_queue_task(ap, ata_pio_task, qc, ATA_SHORT_PAUSE);
5627 poll_next = ata_hsm_move(ap, qc, status, 1);
5629 /* another command or interrupt handler
5630 * may be running at this point.
5637 * ata_qc_new - Request an available ATA command, for queueing
5638 * @ap: Port associated with device @dev
5639 * @dev: Device from whom we request an available command structure
5645 static struct ata_queued_cmd *ata_qc_new(struct ata_port *ap)
5647 struct ata_queued_cmd *qc = NULL;
5650 /* no command while frozen */
5651 if (unlikely(ap->pflags & ATA_PFLAG_FROZEN))
5654 /* the last tag is reserved for internal command. */
5655 for (i = 0; i < ATA_MAX_QUEUE - 1; i++)
5656 if (!test_and_set_bit(i, &ap->qc_allocated)) {
5657 qc = __ata_qc_from_tag(ap, i);
5668 * ata_qc_new_init - Request an available ATA command, and initialize it
5669 * @dev: Device from whom we request an available command structure
5675 struct ata_queued_cmd *ata_qc_new_init(struct ata_device *dev)
5677 struct ata_port *ap = dev->link->ap;
5678 struct ata_queued_cmd *qc;
5680 qc = ata_qc_new(ap);
5693 * ata_qc_free - free unused ata_queued_cmd
5694 * @qc: Command to complete
5696 * Designed to free unused ata_queued_cmd object
5697 * in case something prevents using it.
5700 * spin_lock_irqsave(host lock)
5702 void ata_qc_free(struct ata_queued_cmd *qc)
5704 struct ata_port *ap = qc->ap;
5707 WARN_ON(qc == NULL); /* ata_qc_from_tag _might_ return NULL */
5711 if (likely(ata_tag_valid(tag))) {
5712 qc->tag = ATA_TAG_POISON;
5713 clear_bit(tag, &ap->qc_allocated);
5717 void __ata_qc_complete(struct ata_queued_cmd *qc)
5719 struct ata_port *ap = qc->ap;
5720 struct ata_link *link = qc->dev->link;
5722 WARN_ON(qc == NULL); /* ata_qc_from_tag _might_ return NULL */
5723 WARN_ON(!(qc->flags & ATA_QCFLAG_ACTIVE));
5725 if (likely(qc->flags & ATA_QCFLAG_DMAMAP))
5728 /* command should be marked inactive atomically with qc completion */
5729 if (qc->tf.protocol == ATA_PROT_NCQ) {
5730 link->sactive &= ~(1 << qc->tag);
5732 ap->nr_active_links--;
5734 link->active_tag = ATA_TAG_POISON;
5735 ap->nr_active_links--;
5738 /* clear exclusive status */
5739 if (unlikely(qc->flags & ATA_QCFLAG_CLEAR_EXCL &&
5740 ap->excl_link == link))
5741 ap->excl_link = NULL;
5743 /* atapi: mark qc as inactive to prevent the interrupt handler
5744 * from completing the command twice later, before the error handler
5745 * is called. (when rc != 0 and atapi request sense is needed)
5747 qc->flags &= ~ATA_QCFLAG_ACTIVE;
5748 ap->qc_active &= ~(1 << qc->tag);
5750 /* call completion callback */
5751 qc->complete_fn(qc);
5754 static void fill_result_tf(struct ata_queued_cmd *qc)
5756 struct ata_port *ap = qc->ap;
5758 qc->result_tf.flags = qc->tf.flags;
5759 ap->ops->tf_read(ap, &qc->result_tf);
5762 static void ata_verify_xfer(struct ata_queued_cmd *qc)
5764 struct ata_device *dev = qc->dev;
5766 if (ata_tag_internal(qc->tag))
5769 if (ata_is_nodata(qc->tf.protocol))
5772 if ((dev->mwdma_mask || dev->udma_mask) && ata_is_pio(qc->tf.protocol))
5775 dev->flags &= ~ATA_DFLAG_DUBIOUS_XFER;
5779 * ata_qc_complete - Complete an active ATA command
5780 * @qc: Command to complete
5781 * @err_mask: ATA Status register contents
5783 * Indicate to the mid and upper layers that an ATA
5784 * command has completed, with either an ok or not-ok status.
5787 * spin_lock_irqsave(host lock)
5789 void ata_qc_complete(struct ata_queued_cmd *qc)
5791 struct ata_port *ap = qc->ap;
5793 /* XXX: New EH and old EH use different mechanisms to
5794 * synchronize EH with regular execution path.
5796 * In new EH, a failed qc is marked with ATA_QCFLAG_FAILED.
5797 * Normal execution path is responsible for not accessing a
5798 * failed qc. libata core enforces the rule by returning NULL
5799 * from ata_qc_from_tag() for failed qcs.
5801 * Old EH depends on ata_qc_complete() nullifying completion
5802 * requests if ATA_QCFLAG_EH_SCHEDULED is set. Old EH does
5803 * not synchronize with interrupt handler. Only PIO task is
5806 if (ap->ops->error_handler) {
5807 struct ata_device *dev = qc->dev;
5808 struct ata_eh_info *ehi = &dev->link->eh_info;
5810 WARN_ON(ap->pflags & ATA_PFLAG_FROZEN);
5812 if (unlikely(qc->err_mask))
5813 qc->flags |= ATA_QCFLAG_FAILED;
5815 if (unlikely(qc->flags & ATA_QCFLAG_FAILED)) {
5816 if (!ata_tag_internal(qc->tag)) {
5817 /* always fill result TF for failed qc */
5819 ata_qc_schedule_eh(qc);
5824 /* read result TF if requested */
5825 if (qc->flags & ATA_QCFLAG_RESULT_TF)
5828 /* Some commands need post-processing after successful
5831 switch (qc->tf.command) {
5832 case ATA_CMD_SET_FEATURES:
5833 if (qc->tf.feature != SETFEATURES_WC_ON &&
5834 qc->tf.feature != SETFEATURES_WC_OFF)
5837 case ATA_CMD_INIT_DEV_PARAMS: /* CHS translation changed */
5838 case ATA_CMD_SET_MULTI: /* multi_count changed */
5839 /* revalidate device */
5840 ehi->dev_action[dev->devno] |= ATA_EH_REVALIDATE;
5841 ata_port_schedule_eh(ap);
5845 dev->flags |= ATA_DFLAG_SLEEPING;
5849 if (unlikely(dev->flags & ATA_DFLAG_DUBIOUS_XFER))
5850 ata_verify_xfer(qc);
5852 __ata_qc_complete(qc);
5854 if (qc->flags & ATA_QCFLAG_EH_SCHEDULED)
5857 /* read result TF if failed or requested */
5858 if (qc->err_mask || qc->flags & ATA_QCFLAG_RESULT_TF)
5861 __ata_qc_complete(qc);
5866 * ata_qc_complete_multiple - Complete multiple qcs successfully
5867 * @ap: port in question
5868 * @qc_active: new qc_active mask
5869 * @finish_qc: LLDD callback invoked before completing a qc
5871 * Complete in-flight commands. This functions is meant to be
5872 * called from low-level driver's interrupt routine to complete
5873 * requests normally. ap->qc_active and @qc_active is compared
5874 * and commands are completed accordingly.
5877 * spin_lock_irqsave(host lock)
5880 * Number of completed commands on success, -errno otherwise.
5882 int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active,
5883 void (*finish_qc)(struct ata_queued_cmd *))
5889 done_mask = ap->qc_active ^ qc_active;
5891 if (unlikely(done_mask & qc_active)) {
5892 ata_port_printk(ap, KERN_ERR, "illegal qc_active transition "
5893 "(%08x->%08x)\n", ap->qc_active, qc_active);
5897 for (i = 0; i < ATA_MAX_QUEUE; i++) {
5898 struct ata_queued_cmd *qc;
5900 if (!(done_mask & (1 << i)))
5903 if ((qc = ata_qc_from_tag(ap, i))) {
5906 ata_qc_complete(qc);
5915 * ata_qc_issue - issue taskfile to device
5916 * @qc: command to issue to device
5918 * Prepare an ATA command to submission to device.
5919 * This includes mapping the data into a DMA-able
5920 * area, filling in the S/G table, and finally
5921 * writing the taskfile to hardware, starting the command.
5924 * spin_lock_irqsave(host lock)
5926 void ata_qc_issue(struct ata_queued_cmd *qc)
5928 struct ata_port *ap = qc->ap;
5929 struct ata_link *link = qc->dev->link;
5930 u8 prot = qc->tf.protocol;
5932 /* Make sure only one non-NCQ command is outstanding. The
5933 * check is skipped for old EH because it reuses active qc to
5934 * request ATAPI sense.
5936 WARN_ON(ap->ops->error_handler && ata_tag_valid(link->active_tag));
5938 if (ata_is_ncq(prot)) {
5939 WARN_ON(link->sactive & (1 << qc->tag));
5942 ap->nr_active_links++;
5943 link->sactive |= 1 << qc->tag;
5945 WARN_ON(link->sactive);
5947 ap->nr_active_links++;
5948 link->active_tag = qc->tag;
5951 qc->flags |= ATA_QCFLAG_ACTIVE;
5952 ap->qc_active |= 1 << qc->tag;
5954 /* We guarantee to LLDs that they will have at least one
5955 * non-zero sg if the command is a data command.
5957 BUG_ON(ata_is_data(prot) && (!qc->sg || !qc->n_elem || !qc->nbytes));
5959 /* ata_sg_setup() may update nbytes */
5960 qc->raw_nbytes = qc->nbytes;
5962 if (ata_is_dma(prot) || (ata_is_pio(prot) &&
5963 (ap->flags & ATA_FLAG_PIO_DMA)))
5964 if (ata_sg_setup(qc))
5967 /* if device is sleeping, schedule softreset and abort the link */
5968 if (unlikely(qc->dev->flags & ATA_DFLAG_SLEEPING)) {
5969 link->eh_info.action |= ATA_EH_SOFTRESET;
5970 ata_ehi_push_desc(&link->eh_info, "waking up from sleep");
5971 ata_link_abort(link);
5975 ap->ops->qc_prep(qc);
5977 qc->err_mask |= ap->ops->qc_issue(qc);
5978 if (unlikely(qc->err_mask))
5983 qc->err_mask |= AC_ERR_SYSTEM;
5985 ata_qc_complete(qc);
5989 * ata_qc_issue_prot - issue taskfile to device in proto-dependent manner
5990 * @qc: command to issue to device
5992 * Using various libata functions and hooks, this function
5993 * starts an ATA command. ATA commands are grouped into
5994 * classes called "protocols", and issuing each type of protocol
5995 * is slightly different.
5997 * May be used as the qc_issue() entry in ata_port_operations.
6000 * spin_lock_irqsave(host lock)
6003 * Zero on success, AC_ERR_* mask on failure
6006 unsigned int ata_qc_issue_prot(struct ata_queued_cmd *qc)
6008 struct ata_port *ap = qc->ap;
6010 /* Use polling pio if the LLD doesn't handle
6011 * interrupt driven pio and atapi CDB interrupt.
6013 if (ap->flags & ATA_FLAG_PIO_POLLING) {
6014 switch (qc->tf.protocol) {
6016 case ATA_PROT_NODATA:
6017 case ATAPI_PROT_PIO:
6018 case ATAPI_PROT_NODATA:
6019 qc->tf.flags |= ATA_TFLAG_POLLING;
6021 case ATAPI_PROT_DMA:
6022 if (qc->dev->flags & ATA_DFLAG_CDB_INTR)
6023 /* see ata_dma_blacklisted() */
6031 /* select the device */
6032 ata_dev_select(ap, qc->dev->devno, 1, 0);
6034 /* start the command */
6035 switch (qc->tf.protocol) {
6036 case ATA_PROT_NODATA:
6037 if (qc->tf.flags & ATA_TFLAG_POLLING)
6038 ata_qc_set_polling(qc);
6040 ata_tf_to_host(ap, &qc->tf);
6041 ap->hsm_task_state = HSM_ST_LAST;
6043 if (qc->tf.flags & ATA_TFLAG_POLLING)
6044 ata_port_queue_task(ap, ata_pio_task, qc, 0);
6049 WARN_ON(qc->tf.flags & ATA_TFLAG_POLLING);
6051 ap->ops->tf_load(ap, &qc->tf); /* load tf registers */
6052 ap->ops->bmdma_setup(qc); /* set up bmdma */
6053 ap->ops->bmdma_start(qc); /* initiate bmdma */
6054 ap->hsm_task_state = HSM_ST_LAST;
6058 if (qc->tf.flags & ATA_TFLAG_POLLING)
6059 ata_qc_set_polling(qc);
6061 ata_tf_to_host(ap, &qc->tf);
6063 if (qc->tf.flags & ATA_TFLAG_WRITE) {
6064 /* PIO data out protocol */
6065 ap->hsm_task_state = HSM_ST_FIRST;
6066 ata_port_queue_task(ap, ata_pio_task, qc, 0);
6068 /* always send first data block using
6069 * the ata_pio_task() codepath.
6072 /* PIO data in protocol */
6073 ap->hsm_task_state = HSM_ST;
6075 if (qc->tf.flags & ATA_TFLAG_POLLING)
6076 ata_port_queue_task(ap, ata_pio_task, qc, 0);
6078 /* if polling, ata_pio_task() handles the rest.
6079 * otherwise, interrupt handler takes over from here.
6085 case ATAPI_PROT_PIO:
6086 case ATAPI_PROT_NODATA:
6087 if (qc->tf.flags & ATA_TFLAG_POLLING)
6088 ata_qc_set_polling(qc);
6090 ata_tf_to_host(ap, &qc->tf);
6092 ap->hsm_task_state = HSM_ST_FIRST;
6094 /* send cdb by polling if no cdb interrupt */
6095 if ((!(qc->dev->flags & ATA_DFLAG_CDB_INTR)) ||
6096 (qc->tf.flags & ATA_TFLAG_POLLING))
6097 ata_port_queue_task(ap, ata_pio_task, qc, 0);
6100 case ATAPI_PROT_DMA:
6101 WARN_ON(qc->tf.flags & ATA_TFLAG_POLLING);
6103 ap->ops->tf_load(ap, &qc->tf); /* load tf registers */
6104 ap->ops->bmdma_setup(qc); /* set up bmdma */
6105 ap->hsm_task_state = HSM_ST_FIRST;
6107 /* send cdb by polling if no cdb interrupt */
6108 if (!(qc->dev->flags & ATA_DFLAG_CDB_INTR))
6109 ata_port_queue_task(ap, ata_pio_task, qc, 0);
6114 return AC_ERR_SYSTEM;
6121 * ata_host_intr - Handle host interrupt for given (port, task)
6122 * @ap: Port on which interrupt arrived (possibly...)
6123 * @qc: Taskfile currently active in engine
6125 * Handle host interrupt for given queued command. Currently,
6126 * only DMA interrupts are handled. All other commands are
6127 * handled via polling with interrupts disabled (nIEN bit).
6130 * spin_lock_irqsave(host lock)
6133 * One if interrupt was handled, zero if not (shared irq).
6136 inline unsigned int ata_host_intr(struct ata_port *ap,
6137 struct ata_queued_cmd *qc)
6139 struct ata_eh_info *ehi = &ap->link.eh_info;
6140 u8 status, host_stat = 0;
6142 VPRINTK("ata%u: protocol %d task_state %d\n",
6143 ap->print_id, qc->tf.protocol, ap->hsm_task_state);
6145 /* Check whether we are expecting interrupt in this state */
6146 switch (ap->hsm_task_state) {
6148 /* Some pre-ATAPI-4 devices assert INTRQ
6149 * at this state when ready to receive CDB.
6152 /* Check the ATA_DFLAG_CDB_INTR flag is enough here.
6153 * The flag was turned on only for atapi devices. No
6154 * need to check ata_is_atapi(qc->tf.protocol) again.
6156 if (!(qc->dev->flags & ATA_DFLAG_CDB_INTR))
6160 if (qc->tf.protocol == ATA_PROT_DMA ||
6161 qc->tf.protocol == ATAPI_PROT_DMA) {
6162 /* check status of DMA engine */
6163 host_stat = ap->ops->bmdma_status(ap);
6164 VPRINTK("ata%u: host_stat 0x%X\n",
6165 ap->print_id, host_stat);
6167 /* if it's not our irq... */
6168 if (!(host_stat & ATA_DMA_INTR))
6171 /* before we do anything else, clear DMA-Start bit */
6172 ap->ops->bmdma_stop(qc);
6174 if (unlikely(host_stat & ATA_DMA_ERR)) {
6175 /* error when transfering data to/from memory */
6176 qc->err_mask |= AC_ERR_HOST_BUS;
6177 ap->hsm_task_state = HSM_ST_ERR;
6187 /* check altstatus */
6188 status = ata_altstatus(ap);
6189 if (status & ATA_BUSY)
6192 /* check main status, clearing INTRQ */
6193 status = ata_chk_status(ap);
6194 if (unlikely(status & ATA_BUSY))
6197 /* ack bmdma irq events */
6198 ap->ops->irq_clear(ap);
6200 ata_hsm_move(ap, qc, status, 0);
6202 if (unlikely(qc->err_mask) && (qc->tf.protocol == ATA_PROT_DMA ||
6203 qc->tf.protocol == ATAPI_PROT_DMA))
6204 ata_ehi_push_desc(ehi, "BMDMA stat 0x%x", host_stat);
6206 return 1; /* irq handled */
6209 ap->stats.idle_irq++;
6212 if ((ap->stats.idle_irq % 1000) == 0) {
6214 ap->ops->irq_clear(ap);
6215 ata_port_printk(ap, KERN_WARNING, "irq trap\n");
6219 return 0; /* irq not handled */
6223 * ata_interrupt - Default ATA host interrupt handler
6224 * @irq: irq line (unused)
6225 * @dev_instance: pointer to our ata_host information structure
6227 * Default interrupt handler for PCI IDE devices. Calls
6228 * ata_host_intr() for each port that is not disabled.
6231 * Obtains host lock during operation.
6234 * IRQ_NONE or IRQ_HANDLED.
6237 irqreturn_t ata_interrupt(int irq, void *dev_instance)
6239 struct ata_host *host = dev_instance;
6241 unsigned int handled = 0;
6242 unsigned long flags;
6244 /* TODO: make _irqsave conditional on x86 PCI IDE legacy mode */
6245 spin_lock_irqsave(&host->lock, flags);
6247 for (i = 0; i < host->n_ports; i++) {
6248 struct ata_port *ap;
6250 ap = host->ports[i];
6252 !(ap->flags & ATA_FLAG_DISABLED)) {
6253 struct ata_queued_cmd *qc;
6255 qc = ata_qc_from_tag(ap, ap->link.active_tag);
6256 if (qc && (!(qc->tf.flags & ATA_TFLAG_POLLING)) &&
6257 (qc->flags & ATA_QCFLAG_ACTIVE))
6258 handled |= ata_host_intr(ap, qc);
6262 spin_unlock_irqrestore(&host->lock, flags);
6264 return IRQ_RETVAL(handled);
6268 * sata_scr_valid - test whether SCRs are accessible
6269 * @link: ATA link to test SCR accessibility for
6271 * Test whether SCRs are accessible for @link.
6277 * 1 if SCRs are accessible, 0 otherwise.
6279 int sata_scr_valid(struct ata_link *link)
6281 struct ata_port *ap = link->ap;
6283 return (ap->flags & ATA_FLAG_SATA) && ap->ops->scr_read;
6287 * sata_scr_read - read SCR register of the specified port
6288 * @link: ATA link to read SCR for
6290 * @val: Place to store read value
6292 * Read SCR register @reg of @link into *@val. This function is
6293 * guaranteed to succeed if @link is ap->link, the cable type of
6294 * the port is SATA and the port implements ->scr_read.
6297 * None if @link is ap->link. Kernel thread context otherwise.
6300 * 0 on success, negative errno on failure.
6302 int sata_scr_read(struct ata_link *link, int reg, u32 *val)
6304 if (ata_is_host_link(link)) {
6305 struct ata_port *ap = link->ap;
6307 if (sata_scr_valid(link))
6308 return ap->ops->scr_read(ap, reg, val);
6312 return sata_pmp_scr_read(link, reg, val);
6316 * sata_scr_write - write SCR register of the specified port
6317 * @link: ATA link to write SCR for
6318 * @reg: SCR to write
6319 * @val: value to write
6321 * Write @val to SCR register @reg of @link. This function is
6322 * guaranteed to succeed if @link is ap->link, the cable type of
6323 * the port is SATA and the port implements ->scr_read.
6326 * None if @link is ap->link. Kernel thread context otherwise.
6329 * 0 on success, negative errno on failure.
6331 int sata_scr_write(struct ata_link *link, int reg, u32 val)
6333 if (ata_is_host_link(link)) {
6334 struct ata_port *ap = link->ap;
6336 if (sata_scr_valid(link))
6337 return ap->ops->scr_write(ap, reg, val);
6341 return sata_pmp_scr_write(link, reg, val);
6345 * sata_scr_write_flush - write SCR register of the specified port and flush
6346 * @link: ATA link to write SCR for
6347 * @reg: SCR to write
6348 * @val: value to write
6350 * This function is identical to sata_scr_write() except that this
6351 * function performs flush after writing to the register.
6354 * None if @link is ap->link. Kernel thread context otherwise.
6357 * 0 on success, negative errno on failure.
6359 int sata_scr_write_flush(struct ata_link *link, int reg, u32 val)
6361 if (ata_is_host_link(link)) {
6362 struct ata_port *ap = link->ap;
6365 if (sata_scr_valid(link)) {
6366 rc = ap->ops->scr_write(ap, reg, val);
6368 rc = ap->ops->scr_read(ap, reg, &val);
6374 return sata_pmp_scr_write(link, reg, val);
6378 * ata_link_online - test whether the given link is online
6379 * @link: ATA link to test
6381 * Test whether @link is online. Note that this function returns
6382 * 0 if online status of @link cannot be obtained, so
6383 * ata_link_online(link) != !ata_link_offline(link).
6389 * 1 if the port online status is available and online.
6391 int ata_link_online(struct ata_link *link)
6395 if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0 &&
6396 (sstatus & 0xf) == 0x3)
6402 * ata_link_offline - test whether the given link is offline
6403 * @link: ATA link to test
6405 * Test whether @link is offline. Note that this function
6406 * returns 0 if offline status of @link cannot be obtained, so
6407 * ata_link_online(link) != !ata_link_offline(link).
6413 * 1 if the port offline status is available and offline.
6415 int ata_link_offline(struct ata_link *link)
6419 if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0 &&
6420 (sstatus & 0xf) != 0x3)
6425 int ata_flush_cache(struct ata_device *dev)
6427 unsigned int err_mask;
6430 if (!ata_try_flush_cache(dev))
6433 if (dev->flags & ATA_DFLAG_FLUSH_EXT)
6434 cmd = ATA_CMD_FLUSH_EXT;
6436 cmd = ATA_CMD_FLUSH;
6438 /* This is wrong. On a failed flush we get back the LBA of the lost
6439 sector and we should (assuming it wasn't aborted as unknown) issue
6440 a further flush command to continue the writeback until it
6442 err_mask = ata_do_simple_cmd(dev, cmd);
6444 ata_dev_printk(dev, KERN_ERR, "failed to flush cache\n");
6452 static int ata_host_request_pm(struct ata_host *host, pm_message_t mesg,
6453 unsigned int action, unsigned int ehi_flags,
6456 unsigned long flags;
6459 for (i = 0; i < host->n_ports; i++) {
6460 struct ata_port *ap = host->ports[i];
6461 struct ata_link *link;
6463 /* Previous resume operation might still be in
6464 * progress. Wait for PM_PENDING to clear.
6466 if (ap->pflags & ATA_PFLAG_PM_PENDING) {
6467 ata_port_wait_eh(ap);
6468 WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING);
6471 /* request PM ops to EH */
6472 spin_lock_irqsave(ap->lock, flags);
6477 ap->pm_result = &rc;
6480 ap->pflags |= ATA_PFLAG_PM_PENDING;
6481 __ata_port_for_each_link(link, ap) {
6482 link->eh_info.action |= action;
6483 link->eh_info.flags |= ehi_flags;
6486 ata_port_schedule_eh(ap);
6488 spin_unlock_irqrestore(ap->lock, flags);
6490 /* wait and check result */
6492 ata_port_wait_eh(ap);
6493 WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING);
6503 * ata_host_suspend - suspend host
6504 * @host: host to suspend
6507 * Suspend @host. Actual operation is performed by EH. This
6508 * function requests EH to perform PM operations and waits for EH
6512 * Kernel thread context (may sleep).
6515 * 0 on success, -errno on failure.
6517 int ata_host_suspend(struct ata_host *host, pm_message_t mesg)
6522 * disable link pm on all ports before requesting
6525 ata_lpm_enable(host);
6527 rc = ata_host_request_pm(host, mesg, 0, ATA_EHI_QUIET, 1);
6529 host->dev->power.power_state = mesg;
6534 * ata_host_resume - resume host
6535 * @host: host to resume
6537 * Resume @host. Actual operation is performed by EH. This
6538 * function requests EH to perform PM operations and returns.
6539 * Note that all resume operations are performed parallely.
6542 * Kernel thread context (may sleep).
6544 void ata_host_resume(struct ata_host *host)
6546 ata_host_request_pm(host, PMSG_ON, ATA_EH_SOFTRESET,
6547 ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET, 0);
6548 host->dev->power.power_state = PMSG_ON;
6550 /* reenable link pm */
6551 ata_lpm_disable(host);
6556 * ata_port_start - Set port up for dma.
6557 * @ap: Port to initialize
6559 * Called just after data structures for each port are
6560 * initialized. Allocates space for PRD table.
6562 * May be used as the port_start() entry in ata_port_operations.
6565 * Inherited from caller.
6567 int ata_port_start(struct ata_port *ap)
6569 struct device *dev = ap->dev;
6572 ap->prd = dmam_alloc_coherent(dev, ATA_PRD_TBL_SZ, &ap->prd_dma,
6577 rc = ata_pad_alloc(ap, dev);
6581 DPRINTK("prd alloc, virt %p, dma %llx\n", ap->prd,
6582 (unsigned long long)ap->prd_dma);
6587 * ata_dev_init - Initialize an ata_device structure
6588 * @dev: Device structure to initialize
6590 * Initialize @dev in preparation for probing.
6593 * Inherited from caller.
6595 void ata_dev_init(struct ata_device *dev)
6597 struct ata_link *link = dev->link;
6598 struct ata_port *ap = link->ap;
6599 unsigned long flags;
6601 /* SATA spd limit is bound to the first device */
6602 link->sata_spd_limit = link->hw_sata_spd_limit;
6605 /* High bits of dev->flags are used to record warm plug
6606 * requests which occur asynchronously. Synchronize using
6609 spin_lock_irqsave(ap->lock, flags);
6610 dev->flags &= ~ATA_DFLAG_INIT_MASK;
6612 spin_unlock_irqrestore(ap->lock, flags);
6614 memset((void *)dev + ATA_DEVICE_CLEAR_OFFSET, 0,
6615 sizeof(*dev) - ATA_DEVICE_CLEAR_OFFSET);
6616 dev->pio_mask = UINT_MAX;
6617 dev->mwdma_mask = UINT_MAX;
6618 dev->udma_mask = UINT_MAX;
6622 * ata_link_init - Initialize an ata_link structure
6623 * @ap: ATA port link is attached to
6624 * @link: Link structure to initialize
6625 * @pmp: Port multiplier port number
6630 * Kernel thread context (may sleep)
6632 void ata_link_init(struct ata_port *ap, struct ata_link *link, int pmp)
6636 /* clear everything except for devices */
6637 memset(link, 0, offsetof(struct ata_link, device[0]));
6641 link->active_tag = ATA_TAG_POISON;
6642 link->hw_sata_spd_limit = UINT_MAX;
6644 /* can't use iterator, ap isn't initialized yet */
6645 for (i = 0; i < ATA_MAX_DEVICES; i++) {
6646 struct ata_device *dev = &link->device[i];
6649 dev->devno = dev - link->device;
6655 * sata_link_init_spd - Initialize link->sata_spd_limit
6656 * @link: Link to configure sata_spd_limit for
6658 * Initialize @link->[hw_]sata_spd_limit to the currently
6662 * Kernel thread context (may sleep).
6665 * 0 on success, -errno on failure.
6667 int sata_link_init_spd(struct ata_link *link)
6672 rc = sata_scr_read(link, SCR_CONTROL, &scontrol);
6676 spd = (scontrol >> 4) & 0xf;
6678 link->hw_sata_spd_limit &= (1 << spd) - 1;
6680 link->sata_spd_limit = link->hw_sata_spd_limit;
6686 * ata_port_alloc - allocate and initialize basic ATA port resources
6687 * @host: ATA host this allocated port belongs to
6689 * Allocate and initialize basic ATA port resources.
6692 * Allocate ATA port on success, NULL on failure.
6695 * Inherited from calling layer (may sleep).
6697 struct ata_port *ata_port_alloc(struct ata_host *host)
6699 struct ata_port *ap;
6703 ap = kzalloc(sizeof(*ap), GFP_KERNEL);
6707 ap->pflags |= ATA_PFLAG_INITIALIZING;
6708 ap->lock = &host->lock;
6709 ap->flags = ATA_FLAG_DISABLED;
6711 ap->ctl = ATA_DEVCTL_OBS;
6713 ap->dev = host->dev;
6714 ap->last_ctl = 0xFF;
6716 #if defined(ATA_VERBOSE_DEBUG)
6717 /* turn on all debugging levels */
6718 ap->msg_enable = 0x00FF;
6719 #elif defined(ATA_DEBUG)
6720 ap->msg_enable = ATA_MSG_DRV | ATA_MSG_INFO | ATA_MSG_CTL | ATA_MSG_WARN | ATA_MSG_ERR;
6722 ap->msg_enable = ATA_MSG_DRV | ATA_MSG_ERR | ATA_MSG_WARN;
6725 INIT_DELAYED_WORK(&ap->port_task, NULL);
6726 INIT_DELAYED_WORK(&ap->hotplug_task, ata_scsi_hotplug);
6727 INIT_WORK(&ap->scsi_rescan_task, ata_scsi_dev_rescan);
6728 INIT_LIST_HEAD(&ap->eh_done_q);
6729 init_waitqueue_head(&ap->eh_wait_q);
6730 init_timer_deferrable(&ap->fastdrain_timer);
6731 ap->fastdrain_timer.function = ata_eh_fastdrain_timerfn;
6732 ap->fastdrain_timer.data = (unsigned long)ap;
6734 ap->cbl = ATA_CBL_NONE;
6736 ata_link_init(ap, &ap->link, 0);
6739 ap->stats.unhandled_irq = 1;
6740 ap->stats.idle_irq = 1;
6745 static void ata_host_release(struct device *gendev, void *res)
6747 struct ata_host *host = dev_get_drvdata(gendev);
6750 for (i = 0; i < host->n_ports; i++) {
6751 struct ata_port *ap = host->ports[i];
6757 scsi_host_put(ap->scsi_host);
6759 kfree(ap->pmp_link);
6761 host->ports[i] = NULL;
6764 dev_set_drvdata(gendev, NULL);
6768 * ata_host_alloc - allocate and init basic ATA host resources
6769 * @dev: generic device this host is associated with
6770 * @max_ports: maximum number of ATA ports associated with this host
6772 * Allocate and initialize basic ATA host resources. LLD calls
6773 * this function to allocate a host, initializes it fully and
6774 * attaches it using ata_host_register().
6776 * @max_ports ports are allocated and host->n_ports is
6777 * initialized to @max_ports. The caller is allowed to decrease
6778 * host->n_ports before calling ata_host_register(). The unused
6779 * ports will be automatically freed on registration.
6782 * Allocate ATA host on success, NULL on failure.
6785 * Inherited from calling layer (may sleep).
6787 struct ata_host *ata_host_alloc(struct device *dev, int max_ports)
6789 struct ata_host *host;
6795 if (!devres_open_group(dev, NULL, GFP_KERNEL))
6798 /* alloc a container for our list of ATA ports (buses) */
6799 sz = sizeof(struct ata_host) + (max_ports + 1) * sizeof(void *);
6800 /* alloc a container for our list of ATA ports (buses) */
6801 host = devres_alloc(ata_host_release, sz, GFP_KERNEL);
6805 devres_add(dev, host);
6806 dev_set_drvdata(dev, host);
6808 spin_lock_init(&host->lock);
6810 host->n_ports = max_ports;
6812 /* allocate ports bound to this host */
6813 for (i = 0; i < max_ports; i++) {
6814 struct ata_port *ap;
6816 ap = ata_port_alloc(host);
6821 host->ports[i] = ap;
6824 devres_remove_group(dev, NULL);
6828 devres_release_group(dev, NULL);
6833 * ata_host_alloc_pinfo - alloc host and init with port_info array
6834 * @dev: generic device this host is associated with
6835 * @ppi: array of ATA port_info to initialize host with
6836 * @n_ports: number of ATA ports attached to this host
6838 * Allocate ATA host and initialize with info from @ppi. If NULL
6839 * terminated, @ppi may contain fewer entries than @n_ports. The
6840 * last entry will be used for the remaining ports.
6843 * Allocate ATA host on success, NULL on failure.
6846 * Inherited from calling layer (may sleep).
6848 struct ata_host *ata_host_alloc_pinfo(struct device *dev,
6849 const struct ata_port_info * const * ppi,
6852 const struct ata_port_info *pi;
6853 struct ata_host *host;
6856 host = ata_host_alloc(dev, n_ports);
6860 for (i = 0, j = 0, pi = NULL; i < host->n_ports; i++) {
6861 struct ata_port *ap = host->ports[i];
6866 ap->pio_mask = pi->pio_mask;
6867 ap->mwdma_mask = pi->mwdma_mask;
6868 ap->udma_mask = pi->udma_mask;
6869 ap->flags |= pi->flags;
6870 ap->link.flags |= pi->link_flags;
6871 ap->ops = pi->port_ops;
6873 if (!host->ops && (pi->port_ops != &ata_dummy_port_ops))
6874 host->ops = pi->port_ops;
6875 if (!host->private_data && pi->private_data)
6876 host->private_data = pi->private_data;
6882 static void ata_host_stop(struct device *gendev, void *res)
6884 struct ata_host *host = dev_get_drvdata(gendev);
6887 WARN_ON(!(host->flags & ATA_HOST_STARTED));
6889 for (i = 0; i < host->n_ports; i++) {
6890 struct ata_port *ap = host->ports[i];
6892 if (ap->ops->port_stop)
6893 ap->ops->port_stop(ap);
6896 if (host->ops->host_stop)
6897 host->ops->host_stop(host);
6901 * ata_host_start - start and freeze ports of an ATA host
6902 * @host: ATA host to start ports for
6904 * Start and then freeze ports of @host. Started status is
6905 * recorded in host->flags, so this function can be called
6906 * multiple times. Ports are guaranteed to get started only
6907 * once. If host->ops isn't initialized yet, its set to the
6908 * first non-dummy port ops.
6911 * Inherited from calling layer (may sleep).
6914 * 0 if all ports are started successfully, -errno otherwise.
6916 int ata_host_start(struct ata_host *host)
6919 void *start_dr = NULL;
6922 if (host->flags & ATA_HOST_STARTED)
6925 for (i = 0; i < host->n_ports; i++) {
6926 struct ata_port *ap = host->ports[i];
6928 if (!host->ops && !ata_port_is_dummy(ap))
6929 host->ops = ap->ops;
6931 if (ap->ops->port_stop)
6935 if (host->ops->host_stop)
6939 start_dr = devres_alloc(ata_host_stop, 0, GFP_KERNEL);
6944 for (i = 0; i < host->n_ports; i++) {
6945 struct ata_port *ap = host->ports[i];
6947 if (ap->ops->port_start) {
6948 rc = ap->ops->port_start(ap);
6951 dev_printk(KERN_ERR, host->dev,
6952 "failed to start port %d "
6953 "(errno=%d)\n", i, rc);
6957 ata_eh_freeze_port(ap);
6961 devres_add(host->dev, start_dr);
6962 host->flags |= ATA_HOST_STARTED;
6967 struct ata_port *ap = host->ports[i];
6969 if (ap->ops->port_stop)
6970 ap->ops->port_stop(ap);
6972 devres_free(start_dr);
6977 * ata_sas_host_init - Initialize a host struct
6978 * @host: host to initialize
6979 * @dev: device host is attached to
6980 * @flags: host flags
6984 * PCI/etc. bus probe sem.
6987 /* KILLME - the only user left is ipr */
6988 void ata_host_init(struct ata_host *host, struct device *dev,
6989 unsigned long flags, const struct ata_port_operations *ops)
6991 spin_lock_init(&host->lock);
6993 host->flags = flags;
6998 * ata_host_register - register initialized ATA host
6999 * @host: ATA host to register
7000 * @sht: template for SCSI host
7002 * Register initialized ATA host. @host is allocated using
7003 * ata_host_alloc() and fully initialized by LLD. This function
7004 * starts ports, registers @host with ATA and SCSI layers and
7005 * probe registered devices.
7008 * Inherited from calling layer (may sleep).
7011 * 0 on success, -errno otherwise.
7013 int ata_host_register(struct ata_host *host, struct scsi_host_template *sht)
7017 /* host must have been started */
7018 if (!(host->flags & ATA_HOST_STARTED)) {
7019 dev_printk(KERN_ERR, host->dev,
7020 "BUG: trying to register unstarted host\n");
7025 /* Blow away unused ports. This happens when LLD can't
7026 * determine the exact number of ports to allocate at
7029 for (i = host->n_ports; host->ports[i]; i++)
7030 kfree(host->ports[i]);
7032 /* give ports names and add SCSI hosts */
7033 for (i = 0; i < host->n_ports; i++)
7034 host->ports[i]->print_id = ata_print_id++;
7036 rc = ata_scsi_add_hosts(host, sht);
7040 /* associate with ACPI nodes */
7041 ata_acpi_associate(host);
7043 /* set cable, sata_spd_limit and report */
7044 for (i = 0; i < host->n_ports; i++) {
7045 struct ata_port *ap = host->ports[i];
7046 unsigned long xfer_mask;
7048 /* set SATA cable type if still unset */
7049 if (ap->cbl == ATA_CBL_NONE && (ap->flags & ATA_FLAG_SATA))
7050 ap->cbl = ATA_CBL_SATA;
7052 /* init sata_spd_limit to the current value */
7053 sata_link_init_spd(&ap->link);
7055 /* print per-port info to dmesg */
7056 xfer_mask = ata_pack_xfermask(ap->pio_mask, ap->mwdma_mask,
7059 if (!ata_port_is_dummy(ap)) {
7060 ata_port_printk(ap, KERN_INFO,
7061 "%cATA max %s %s\n",
7062 (ap->flags & ATA_FLAG_SATA) ? 'S' : 'P',
7063 ata_mode_string(xfer_mask),
7064 ap->link.eh_info.desc);
7065 ata_ehi_clear_desc(&ap->link.eh_info);
7067 ata_port_printk(ap, KERN_INFO, "DUMMY\n");
7070 /* perform each probe synchronously */
7071 DPRINTK("probe begin\n");
7072 for (i = 0; i < host->n_ports; i++) {
7073 struct ata_port *ap = host->ports[i];
7077 if (ap->ops->error_handler) {
7078 struct ata_eh_info *ehi = &ap->link.eh_info;
7079 unsigned long flags;
7083 /* kick EH for boot probing */
7084 spin_lock_irqsave(ap->lock, flags);
7087 (1 << ata_link_max_devices(&ap->link)) - 1;
7088 ehi->action |= ATA_EH_SOFTRESET;
7089 ehi->flags |= ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET;
7091 ap->pflags &= ~ATA_PFLAG_INITIALIZING;
7092 ap->pflags |= ATA_PFLAG_LOADING;
7093 ata_port_schedule_eh(ap);
7095 spin_unlock_irqrestore(ap->lock, flags);
7097 /* wait for EH to finish */
7098 ata_port_wait_eh(ap);
7100 DPRINTK("ata%u: bus probe begin\n", ap->print_id);
7101 rc = ata_bus_probe(ap);
7102 DPRINTK("ata%u: bus probe end\n", ap->print_id);
7105 /* FIXME: do something useful here?
7106 * Current libata behavior will
7107 * tear down everything when
7108 * the module is removed
7109 * or the h/w is unplugged.
7115 /* probes are done, now scan each port's disk(s) */
7116 DPRINTK("host probe begin\n");
7117 for (i = 0; i < host->n_ports; i++) {
7118 struct ata_port *ap = host->ports[i];
7120 ata_scsi_scan_host(ap, 1);
7121 ata_lpm_schedule(ap, ap->pm_policy);
7128 * ata_host_activate - start host, request IRQ and register it
7129 * @host: target ATA host
7130 * @irq: IRQ to request
7131 * @irq_handler: irq_handler used when requesting IRQ
7132 * @irq_flags: irq_flags used when requesting IRQ
7133 * @sht: scsi_host_template to use when registering the host
7135 * After allocating an ATA host and initializing it, most libata
7136 * LLDs perform three steps to activate the host - start host,
7137 * request IRQ and register it. This helper takes necessasry
7138 * arguments and performs the three steps in one go.
7140 * An invalid IRQ skips the IRQ registration and expects the host to
7141 * have set polling mode on the port. In this case, @irq_handler
7145 * Inherited from calling layer (may sleep).
7148 * 0 on success, -errno otherwise.
7150 int ata_host_activate(struct ata_host *host, int irq,
7151 irq_handler_t irq_handler, unsigned long irq_flags,
7152 struct scsi_host_template *sht)
7156 rc = ata_host_start(host);
7160 /* Special case for polling mode */
7162 WARN_ON(irq_handler);
7163 return ata_host_register(host, sht);
7166 rc = devm_request_irq(host->dev, irq, irq_handler, irq_flags,
7167 dev_driver_string(host->dev), host);
7171 for (i = 0; i < host->n_ports; i++)
7172 ata_port_desc(host->ports[i], "irq %d", irq);
7174 rc = ata_host_register(host, sht);
7175 /* if failed, just free the IRQ and leave ports alone */
7177 devm_free_irq(host->dev, irq, host);
7183 * ata_port_detach - Detach ATA port in prepration of device removal
7184 * @ap: ATA port to be detached
7186 * Detach all ATA devices and the associated SCSI devices of @ap;
7187 * then, remove the associated SCSI host. @ap is guaranteed to
7188 * be quiescent on return from this function.
7191 * Kernel thread context (may sleep).
7193 static void ata_port_detach(struct ata_port *ap)
7195 unsigned long flags;
7196 struct ata_link *link;
7197 struct ata_device *dev;
7199 if (!ap->ops->error_handler)
7202 /* tell EH we're leaving & flush EH */
7203 spin_lock_irqsave(ap->lock, flags);
7204 ap->pflags |= ATA_PFLAG_UNLOADING;
7205 spin_unlock_irqrestore(ap->lock, flags);
7207 ata_port_wait_eh(ap);
7209 /* EH is now guaranteed to see UNLOADING - EH context belongs
7210 * to us. Disable all existing devices.
7212 ata_port_for_each_link(link, ap) {
7213 ata_link_for_each_dev(dev, link)
7214 ata_dev_disable(dev);
7217 /* Final freeze & EH. All in-flight commands are aborted. EH
7218 * will be skipped and retrials will be terminated with bad
7221 spin_lock_irqsave(ap->lock, flags);
7222 ata_port_freeze(ap); /* won't be thawed */
7223 spin_unlock_irqrestore(ap->lock, flags);
7225 ata_port_wait_eh(ap);
7226 cancel_rearming_delayed_work(&ap->hotplug_task);
7229 /* remove the associated SCSI host */
7230 scsi_remove_host(ap->scsi_host);
7234 * ata_host_detach - Detach all ports of an ATA host
7235 * @host: Host to detach
7237 * Detach all ports of @host.
7240 * Kernel thread context (may sleep).
7242 void ata_host_detach(struct ata_host *host)
7246 for (i = 0; i < host->n_ports; i++)
7247 ata_port_detach(host->ports[i]);
7249 /* the host is dead now, dissociate ACPI */
7250 ata_acpi_dissociate(host);
7254 * ata_std_ports - initialize ioaddr with standard port offsets.
7255 * @ioaddr: IO address structure to be initialized
7257 * Utility function which initializes data_addr, error_addr,
7258 * feature_addr, nsect_addr, lbal_addr, lbam_addr, lbah_addr,
7259 * device_addr, status_addr, and command_addr to standard offsets
7260 * relative to cmd_addr.
7262 * Does not set ctl_addr, altstatus_addr, bmdma_addr, or scr_addr.
7265 void ata_std_ports(struct ata_ioports *ioaddr)
7267 ioaddr->data_addr = ioaddr->cmd_addr + ATA_REG_DATA;
7268 ioaddr->error_addr = ioaddr->cmd_addr + ATA_REG_ERR;
7269 ioaddr->feature_addr = ioaddr->cmd_addr + ATA_REG_FEATURE;
7270 ioaddr->nsect_addr = ioaddr->cmd_addr + ATA_REG_NSECT;
7271 ioaddr->lbal_addr = ioaddr->cmd_addr + ATA_REG_LBAL;
7272 ioaddr->lbam_addr = ioaddr->cmd_addr + ATA_REG_LBAM;
7273 ioaddr->lbah_addr = ioaddr->cmd_addr + ATA_REG_LBAH;
7274 ioaddr->device_addr = ioaddr->cmd_addr + ATA_REG_DEVICE;
7275 ioaddr->status_addr = ioaddr->cmd_addr + ATA_REG_STATUS;
7276 ioaddr->command_addr = ioaddr->cmd_addr + ATA_REG_CMD;
7283 * ata_pci_remove_one - PCI layer callback for device removal
7284 * @pdev: PCI device that was removed
7286 * PCI layer indicates to libata via this hook that hot-unplug or
7287 * module unload event has occurred. Detach all ports. Resource
7288 * release is handled via devres.
7291 * Inherited from PCI layer (may sleep).
7293 void ata_pci_remove_one(struct pci_dev *pdev)
7295 struct device *dev = &pdev->dev;
7296 struct ata_host *host = dev_get_drvdata(dev);
7298 ata_host_detach(host);
7301 /* move to PCI subsystem */
7302 int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits)
7304 unsigned long tmp = 0;
7306 switch (bits->width) {
7309 pci_read_config_byte(pdev, bits->reg, &tmp8);
7315 pci_read_config_word(pdev, bits->reg, &tmp16);
7321 pci_read_config_dword(pdev, bits->reg, &tmp32);
7332 return (tmp == bits->val) ? 1 : 0;
7336 void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg)
7338 pci_save_state(pdev);
7339 pci_disable_device(pdev);
7341 if (mesg.event == PM_EVENT_SUSPEND)
7342 pci_set_power_state(pdev, PCI_D3hot);
7345 int ata_pci_device_do_resume(struct pci_dev *pdev)
7349 pci_set_power_state(pdev, PCI_D0);
7350 pci_restore_state(pdev);
7352 rc = pcim_enable_device(pdev);
7354 dev_printk(KERN_ERR, &pdev->dev,
7355 "failed to enable device after resume (%d)\n", rc);
7359 pci_set_master(pdev);
7363 int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg)
7365 struct ata_host *host = dev_get_drvdata(&pdev->dev);
7368 rc = ata_host_suspend(host, mesg);
7372 ata_pci_device_do_suspend(pdev, mesg);
7377 int ata_pci_device_resume(struct pci_dev *pdev)
7379 struct ata_host *host = dev_get_drvdata(&pdev->dev);
7382 rc = ata_pci_device_do_resume(pdev);
7384 ata_host_resume(host);
7387 #endif /* CONFIG_PM */
7389 #endif /* CONFIG_PCI */
7392 static int __init ata_init(void)
7394 ata_probe_timeout *= HZ;
7395 ata_wq = create_workqueue("ata");
7399 ata_aux_wq = create_singlethread_workqueue("ata_aux");
7401 destroy_workqueue(ata_wq);
7405 printk(KERN_DEBUG "libata version " DRV_VERSION " loaded.\n");
7409 static void __exit ata_exit(void)
7411 destroy_workqueue(ata_wq);
7412 destroy_workqueue(ata_aux_wq);
7415 subsys_initcall(ata_init);
7416 module_exit(ata_exit);
7418 static unsigned long ratelimit_time;
7419 static DEFINE_SPINLOCK(ata_ratelimit_lock);
7421 int ata_ratelimit(void)
7424 unsigned long flags;
7426 spin_lock_irqsave(&ata_ratelimit_lock, flags);
7428 if (time_after(jiffies, ratelimit_time)) {
7430 ratelimit_time = jiffies + (HZ/5);
7434 spin_unlock_irqrestore(&ata_ratelimit_lock, flags);
7440 * ata_wait_register - wait until register value changes
7441 * @reg: IO-mapped register
7442 * @mask: Mask to apply to read register value
7443 * @val: Wait condition
7444 * @interval_msec: polling interval in milliseconds
7445 * @timeout_msec: timeout in milliseconds
7447 * Waiting for some bits of register to change is a common
7448 * operation for ATA controllers. This function reads 32bit LE
7449 * IO-mapped register @reg and tests for the following condition.
7451 * (*@reg & mask) != val
7453 * If the condition is met, it returns; otherwise, the process is
7454 * repeated after @interval_msec until timeout.
7457 * Kernel thread context (may sleep)
7460 * The final register value.
7462 u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val,
7463 unsigned long interval_msec,
7464 unsigned long timeout_msec)
7466 unsigned long timeout;
7469 tmp = ioread32(reg);
7471 /* Calculate timeout _after_ the first read to make sure
7472 * preceding writes reach the controller before starting to
7473 * eat away the timeout.
7475 timeout = jiffies + (timeout_msec * HZ) / 1000;
7477 while ((tmp & mask) == val && time_before(jiffies, timeout)) {
7478 msleep(interval_msec);
7479 tmp = ioread32(reg);
7488 static void ata_dummy_noret(struct ata_port *ap) { }
7489 static int ata_dummy_ret0(struct ata_port *ap) { return 0; }
7490 static void ata_dummy_qc_noret(struct ata_queued_cmd *qc) { }
7492 static u8 ata_dummy_check_status(struct ata_port *ap)
7497 static unsigned int ata_dummy_qc_issue(struct ata_queued_cmd *qc)
7499 return AC_ERR_SYSTEM;
7502 const struct ata_port_operations ata_dummy_port_ops = {
7503 .check_status = ata_dummy_check_status,
7504 .check_altstatus = ata_dummy_check_status,
7505 .dev_select = ata_noop_dev_select,
7506 .qc_prep = ata_noop_qc_prep,
7507 .qc_issue = ata_dummy_qc_issue,
7508 .freeze = ata_dummy_noret,
7509 .thaw = ata_dummy_noret,
7510 .error_handler = ata_dummy_noret,
7511 .post_internal_cmd = ata_dummy_qc_noret,
7512 .irq_clear = ata_dummy_noret,
7513 .port_start = ata_dummy_ret0,
7514 .port_stop = ata_dummy_noret,
7517 const struct ata_port_info ata_dummy_port_info = {
7518 .port_ops = &ata_dummy_port_ops,
7522 * libata is essentially a library of internal helper functions for
7523 * low-level ATA host controller drivers. As such, the API/ABI is
7524 * likely to change as new drivers are added and updated.
7525 * Do not depend on ABI/API stability.
7527 EXPORT_SYMBOL_GPL(sata_deb_timing_normal);
7528 EXPORT_SYMBOL_GPL(sata_deb_timing_hotplug);
7529 EXPORT_SYMBOL_GPL(sata_deb_timing_long);
7530 EXPORT_SYMBOL_GPL(ata_dummy_port_ops);
7531 EXPORT_SYMBOL_GPL(ata_dummy_port_info);
7532 EXPORT_SYMBOL_GPL(ata_std_bios_param);
7533 EXPORT_SYMBOL_GPL(ata_std_ports);
7534 EXPORT_SYMBOL_GPL(ata_host_init);
7535 EXPORT_SYMBOL_GPL(ata_host_alloc);
7536 EXPORT_SYMBOL_GPL(ata_host_alloc_pinfo);
7537 EXPORT_SYMBOL_GPL(ata_host_start);
7538 EXPORT_SYMBOL_GPL(ata_host_register);
7539 EXPORT_SYMBOL_GPL(ata_host_activate);
7540 EXPORT_SYMBOL_GPL(ata_host_detach);
7541 EXPORT_SYMBOL_GPL(ata_sg_init);
7542 EXPORT_SYMBOL_GPL(ata_hsm_move);
7543 EXPORT_SYMBOL_GPL(ata_qc_complete);
7544 EXPORT_SYMBOL_GPL(ata_qc_complete_multiple);
7545 EXPORT_SYMBOL_GPL(ata_qc_issue_prot);
7546 EXPORT_SYMBOL_GPL(ata_tf_load);
7547 EXPORT_SYMBOL_GPL(ata_tf_read);
7548 EXPORT_SYMBOL_GPL(ata_noop_dev_select);
7549 EXPORT_SYMBOL_GPL(ata_std_dev_select);
7550 EXPORT_SYMBOL_GPL(sata_print_link_status);
7551 EXPORT_SYMBOL_GPL(ata_tf_to_fis);
7552 EXPORT_SYMBOL_GPL(ata_tf_from_fis);
7553 EXPORT_SYMBOL_GPL(ata_pack_xfermask);
7554 EXPORT_SYMBOL_GPL(ata_unpack_xfermask);
7555 EXPORT_SYMBOL_GPL(ata_xfer_mask2mode);
7556 EXPORT_SYMBOL_GPL(ata_xfer_mode2mask);
7557 EXPORT_SYMBOL_GPL(ata_xfer_mode2shift);
7558 EXPORT_SYMBOL_GPL(ata_mode_string);
7559 EXPORT_SYMBOL_GPL(ata_id_xfermask);
7560 EXPORT_SYMBOL_GPL(ata_check_status);
7561 EXPORT_SYMBOL_GPL(ata_altstatus);
7562 EXPORT_SYMBOL_GPL(ata_exec_command);
7563 EXPORT_SYMBOL_GPL(ata_port_start);
7564 EXPORT_SYMBOL_GPL(ata_sff_port_start);
7565 EXPORT_SYMBOL_GPL(ata_interrupt);
7566 EXPORT_SYMBOL_GPL(ata_do_set_mode);
7567 EXPORT_SYMBOL_GPL(ata_data_xfer);
7568 EXPORT_SYMBOL_GPL(ata_data_xfer_noirq);
7569 EXPORT_SYMBOL_GPL(ata_std_qc_defer);
7570 EXPORT_SYMBOL_GPL(ata_qc_prep);
7571 EXPORT_SYMBOL_GPL(ata_dumb_qc_prep);
7572 EXPORT_SYMBOL_GPL(ata_noop_qc_prep);
7573 EXPORT_SYMBOL_GPL(ata_bmdma_setup);
7574 EXPORT_SYMBOL_GPL(ata_bmdma_start);
7575 EXPORT_SYMBOL_GPL(ata_bmdma_irq_clear);
7576 EXPORT_SYMBOL_GPL(ata_bmdma_status);
7577 EXPORT_SYMBOL_GPL(ata_bmdma_stop);
7578 EXPORT_SYMBOL_GPL(ata_bmdma_freeze);
7579 EXPORT_SYMBOL_GPL(ata_bmdma_thaw);
7580 EXPORT_SYMBOL_GPL(ata_bmdma_drive_eh);
7581 EXPORT_SYMBOL_GPL(ata_bmdma_error_handler);
7582 EXPORT_SYMBOL_GPL(ata_bmdma_post_internal_cmd);
7583 EXPORT_SYMBOL_GPL(ata_port_probe);
7584 EXPORT_SYMBOL_GPL(ata_dev_disable);
7585 EXPORT_SYMBOL_GPL(sata_set_spd);
7586 EXPORT_SYMBOL_GPL(sata_link_debounce);
7587 EXPORT_SYMBOL_GPL(sata_link_resume);
7588 EXPORT_SYMBOL_GPL(ata_bus_reset);
7589 EXPORT_SYMBOL_GPL(ata_std_prereset);
7590 EXPORT_SYMBOL_GPL(ata_std_softreset);
7591 EXPORT_SYMBOL_GPL(sata_link_hardreset);
7592 EXPORT_SYMBOL_GPL(sata_std_hardreset);
7593 EXPORT_SYMBOL_GPL(ata_std_postreset);
7594 EXPORT_SYMBOL_GPL(ata_dev_classify);
7595 EXPORT_SYMBOL_GPL(ata_dev_pair);
7596 EXPORT_SYMBOL_GPL(ata_port_disable);
7597 EXPORT_SYMBOL_GPL(ata_ratelimit);
7598 EXPORT_SYMBOL_GPL(ata_wait_register);
7599 EXPORT_SYMBOL_GPL(ata_busy_sleep);
7600 EXPORT_SYMBOL_GPL(ata_wait_after_reset);
7601 EXPORT_SYMBOL_GPL(ata_wait_ready);
7602 EXPORT_SYMBOL_GPL(ata_port_queue_task);
7603 EXPORT_SYMBOL_GPL(ata_scsi_ioctl);
7604 EXPORT_SYMBOL_GPL(ata_scsi_queuecmd);
7605 EXPORT_SYMBOL_GPL(ata_scsi_slave_config);
7606 EXPORT_SYMBOL_GPL(ata_scsi_slave_destroy);
7607 EXPORT_SYMBOL_GPL(ata_scsi_change_queue_depth);
7608 EXPORT_SYMBOL_GPL(ata_host_intr);
7609 EXPORT_SYMBOL_GPL(sata_scr_valid);
7610 EXPORT_SYMBOL_GPL(sata_scr_read);
7611 EXPORT_SYMBOL_GPL(sata_scr_write);
7612 EXPORT_SYMBOL_GPL(sata_scr_write_flush);
7613 EXPORT_SYMBOL_GPL(ata_link_online);
7614 EXPORT_SYMBOL_GPL(ata_link_offline);
7616 EXPORT_SYMBOL_GPL(ata_host_suspend);
7617 EXPORT_SYMBOL_GPL(ata_host_resume);
7618 #endif /* CONFIG_PM */
7619 EXPORT_SYMBOL_GPL(ata_id_string);
7620 EXPORT_SYMBOL_GPL(ata_id_c_string);
7621 EXPORT_SYMBOL_GPL(ata_scsi_simulate);
7623 EXPORT_SYMBOL_GPL(ata_pio_need_iordy);
7624 EXPORT_SYMBOL_GPL(ata_timing_find_mode);
7625 EXPORT_SYMBOL_GPL(ata_timing_compute);
7626 EXPORT_SYMBOL_GPL(ata_timing_merge);
7627 EXPORT_SYMBOL_GPL(ata_timing_cycle2mode);
7630 EXPORT_SYMBOL_GPL(pci_test_config_bits);
7631 EXPORT_SYMBOL_GPL(ata_pci_init_sff_host);
7632 EXPORT_SYMBOL_GPL(ata_pci_init_bmdma);
7633 EXPORT_SYMBOL_GPL(ata_pci_prepare_sff_host);
7634 EXPORT_SYMBOL_GPL(ata_pci_init_one);
7635 EXPORT_SYMBOL_GPL(ata_pci_remove_one);
7637 EXPORT_SYMBOL_GPL(ata_pci_device_do_suspend);
7638 EXPORT_SYMBOL_GPL(ata_pci_device_do_resume);
7639 EXPORT_SYMBOL_GPL(ata_pci_device_suspend);
7640 EXPORT_SYMBOL_GPL(ata_pci_device_resume);
7641 #endif /* CONFIG_PM */
7642 EXPORT_SYMBOL_GPL(ata_pci_default_filter);
7643 EXPORT_SYMBOL_GPL(ata_pci_clear_simplex);
7644 #endif /* CONFIG_PCI */
7646 EXPORT_SYMBOL_GPL(sata_pmp_qc_defer_cmd_switch);
7647 EXPORT_SYMBOL_GPL(sata_pmp_std_prereset);
7648 EXPORT_SYMBOL_GPL(sata_pmp_std_hardreset);
7649 EXPORT_SYMBOL_GPL(sata_pmp_std_postreset);
7650 EXPORT_SYMBOL_GPL(sata_pmp_do_eh);
7652 EXPORT_SYMBOL_GPL(__ata_ehi_push_desc);
7653 EXPORT_SYMBOL_GPL(ata_ehi_push_desc);
7654 EXPORT_SYMBOL_GPL(ata_ehi_clear_desc);
7655 EXPORT_SYMBOL_GPL(ata_port_desc);
7657 EXPORT_SYMBOL_GPL(ata_port_pbar_desc);
7658 #endif /* CONFIG_PCI */
7659 EXPORT_SYMBOL_GPL(ata_port_schedule_eh);
7660 EXPORT_SYMBOL_GPL(ata_link_abort);
7661 EXPORT_SYMBOL_GPL(ata_port_abort);
7662 EXPORT_SYMBOL_GPL(ata_port_freeze);
7663 EXPORT_SYMBOL_GPL(sata_async_notification);
7664 EXPORT_SYMBOL_GPL(ata_eh_freeze_port);
7665 EXPORT_SYMBOL_GPL(ata_eh_thaw_port);
7666 EXPORT_SYMBOL_GPL(ata_eh_qc_complete);
7667 EXPORT_SYMBOL_GPL(ata_eh_qc_retry);
7668 EXPORT_SYMBOL_GPL(ata_do_eh);
7669 EXPORT_SYMBOL_GPL(ata_irq_on);
7670 EXPORT_SYMBOL_GPL(ata_dev_try_classify);
7672 EXPORT_SYMBOL_GPL(ata_cable_40wire);
7673 EXPORT_SYMBOL_GPL(ata_cable_80wire);
7674 EXPORT_SYMBOL_GPL(ata_cable_unknown);
7675 EXPORT_SYMBOL_GPL(ata_cable_ignore);
7676 EXPORT_SYMBOL_GPL(ata_cable_sata);