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/
35 #include <linux/config.h>
36 #include <linux/kernel.h>
37 #include <linux/module.h>
38 #include <linux/pci.h>
39 #include <linux/init.h>
40 #include <linux/list.h>
42 #include <linux/highmem.h>
43 #include <linux/spinlock.h>
44 #include <linux/blkdev.h>
45 #include <linux/delay.h>
46 #include <linux/timer.h>
47 #include <linux/interrupt.h>
48 #include <linux/completion.h>
49 #include <linux/suspend.h>
50 #include <linux/workqueue.h>
51 #include <linux/jiffies.h>
52 #include <linux/scatterlist.h>
53 #include <scsi/scsi.h>
54 #include "scsi_priv.h"
55 #include <scsi/scsi_cmnd.h>
56 #include <scsi/scsi_host.h>
57 #include <linux/libata.h>
59 #include <asm/semaphore.h>
60 #include <asm/byteorder.h>
64 /* debounce timing parameters in msecs { interval, duration, timeout } */
65 const unsigned long sata_deb_timing_boot[] = { 5, 100, 2000 };
66 const unsigned long sata_deb_timing_eh[] = { 25, 500, 2000 };
67 const unsigned long sata_deb_timing_before_fsrst[] = { 100, 2000, 5000 };
69 static unsigned int ata_dev_init_params(struct ata_device *dev,
70 u16 heads, u16 sectors);
71 static unsigned int ata_dev_set_xfermode(struct ata_device *dev);
72 static void ata_dev_xfermask(struct ata_device *dev);
74 static unsigned int ata_unique_id = 1;
75 static struct workqueue_struct *ata_wq;
77 struct workqueue_struct *ata_aux_wq;
79 int atapi_enabled = 1;
80 module_param(atapi_enabled, int, 0444);
81 MODULE_PARM_DESC(atapi_enabled, "Enable discovery of ATAPI devices (0=off, 1=on)");
84 module_param(atapi_dmadir, int, 0444);
85 MODULE_PARM_DESC(atapi_dmadir, "Enable ATAPI DMADIR bridge support (0=off, 1=on)");
88 module_param_named(fua, libata_fua, int, 0444);
89 MODULE_PARM_DESC(fua, "FUA support (0=off, 1=on)");
91 MODULE_AUTHOR("Jeff Garzik");
92 MODULE_DESCRIPTION("Library module for ATA devices");
93 MODULE_LICENSE("GPL");
94 MODULE_VERSION(DRV_VERSION);
98 * ata_tf_to_fis - Convert ATA taskfile to SATA FIS structure
99 * @tf: Taskfile to convert
100 * @fis: Buffer into which data will output
101 * @pmp: Port multiplier port
103 * Converts a standard ATA taskfile to a Serial ATA
104 * FIS structure (Register - Host to Device).
107 * Inherited from caller.
110 void ata_tf_to_fis(const struct ata_taskfile *tf, u8 *fis, u8 pmp)
112 fis[0] = 0x27; /* Register - Host to Device FIS */
113 fis[1] = (pmp & 0xf) | (1 << 7); /* Port multiplier number,
114 bit 7 indicates Command FIS */
115 fis[2] = tf->command;
116 fis[3] = tf->feature;
123 fis[8] = tf->hob_lbal;
124 fis[9] = tf->hob_lbam;
125 fis[10] = tf->hob_lbah;
126 fis[11] = tf->hob_feature;
129 fis[13] = tf->hob_nsect;
140 * ata_tf_from_fis - Convert SATA FIS to ATA taskfile
141 * @fis: Buffer from which data will be input
142 * @tf: Taskfile to output
144 * Converts a serial ATA FIS structure to a standard ATA taskfile.
147 * Inherited from caller.
150 void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf)
152 tf->command = fis[2]; /* status */
153 tf->feature = fis[3]; /* error */
160 tf->hob_lbal = fis[8];
161 tf->hob_lbam = fis[9];
162 tf->hob_lbah = fis[10];
165 tf->hob_nsect = fis[13];
168 static const u8 ata_rw_cmds[] = {
172 ATA_CMD_READ_MULTI_EXT,
173 ATA_CMD_WRITE_MULTI_EXT,
177 ATA_CMD_WRITE_MULTI_FUA_EXT,
181 ATA_CMD_PIO_READ_EXT,
182 ATA_CMD_PIO_WRITE_EXT,
195 ATA_CMD_WRITE_FUA_EXT
199 * ata_rwcmd_protocol - set taskfile r/w commands and protocol
200 * @qc: command to examine and configure
202 * Examine the device configuration and tf->flags to calculate
203 * the proper read/write commands and protocol to use.
208 int ata_rwcmd_protocol(struct ata_queued_cmd *qc)
210 struct ata_taskfile *tf = &qc->tf;
211 struct ata_device *dev = qc->dev;
214 int index, fua, lba48, write;
216 fua = (tf->flags & ATA_TFLAG_FUA) ? 4 : 0;
217 lba48 = (tf->flags & ATA_TFLAG_LBA48) ? 2 : 0;
218 write = (tf->flags & ATA_TFLAG_WRITE) ? 1 : 0;
220 if (dev->flags & ATA_DFLAG_PIO) {
221 tf->protocol = ATA_PROT_PIO;
222 index = dev->multi_count ? 0 : 8;
223 } else if (lba48 && (qc->ap->flags & ATA_FLAG_PIO_LBA48)) {
224 /* Unable to use DMA due to host limitation */
225 tf->protocol = ATA_PROT_PIO;
226 index = dev->multi_count ? 0 : 8;
228 tf->protocol = ATA_PROT_DMA;
232 cmd = ata_rw_cmds[index + fua + lba48 + write];
241 * ata_pack_xfermask - Pack pio, mwdma and udma masks into xfer_mask
242 * @pio_mask: pio_mask
243 * @mwdma_mask: mwdma_mask
244 * @udma_mask: udma_mask
246 * Pack @pio_mask, @mwdma_mask and @udma_mask into a single
247 * unsigned int xfer_mask.
255 static unsigned int ata_pack_xfermask(unsigned int pio_mask,
256 unsigned int mwdma_mask,
257 unsigned int udma_mask)
259 return ((pio_mask << ATA_SHIFT_PIO) & ATA_MASK_PIO) |
260 ((mwdma_mask << ATA_SHIFT_MWDMA) & ATA_MASK_MWDMA) |
261 ((udma_mask << ATA_SHIFT_UDMA) & ATA_MASK_UDMA);
265 * ata_unpack_xfermask - Unpack xfer_mask into pio, mwdma and udma masks
266 * @xfer_mask: xfer_mask to unpack
267 * @pio_mask: resulting pio_mask
268 * @mwdma_mask: resulting mwdma_mask
269 * @udma_mask: resulting udma_mask
271 * Unpack @xfer_mask into @pio_mask, @mwdma_mask and @udma_mask.
272 * Any NULL distination masks will be ignored.
274 static void ata_unpack_xfermask(unsigned int xfer_mask,
275 unsigned int *pio_mask,
276 unsigned int *mwdma_mask,
277 unsigned int *udma_mask)
280 *pio_mask = (xfer_mask & ATA_MASK_PIO) >> ATA_SHIFT_PIO;
282 *mwdma_mask = (xfer_mask & ATA_MASK_MWDMA) >> ATA_SHIFT_MWDMA;
284 *udma_mask = (xfer_mask & ATA_MASK_UDMA) >> ATA_SHIFT_UDMA;
287 static const struct ata_xfer_ent {
291 { ATA_SHIFT_PIO, ATA_BITS_PIO, XFER_PIO_0 },
292 { ATA_SHIFT_MWDMA, ATA_BITS_MWDMA, XFER_MW_DMA_0 },
293 { ATA_SHIFT_UDMA, ATA_BITS_UDMA, XFER_UDMA_0 },
298 * ata_xfer_mask2mode - Find matching XFER_* for the given xfer_mask
299 * @xfer_mask: xfer_mask of interest
301 * Return matching XFER_* value for @xfer_mask. Only the highest
302 * bit of @xfer_mask is considered.
308 * Matching XFER_* value, 0 if no match found.
310 static u8 ata_xfer_mask2mode(unsigned int xfer_mask)
312 int highbit = fls(xfer_mask) - 1;
313 const struct ata_xfer_ent *ent;
315 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
316 if (highbit >= ent->shift && highbit < ent->shift + ent->bits)
317 return ent->base + highbit - ent->shift;
322 * ata_xfer_mode2mask - Find matching xfer_mask for XFER_*
323 * @xfer_mode: XFER_* of interest
325 * Return matching xfer_mask for @xfer_mode.
331 * Matching xfer_mask, 0 if no match found.
333 static unsigned int ata_xfer_mode2mask(u8 xfer_mode)
335 const struct ata_xfer_ent *ent;
337 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
338 if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits)
339 return 1 << (ent->shift + xfer_mode - ent->base);
344 * ata_xfer_mode2shift - Find matching xfer_shift for XFER_*
345 * @xfer_mode: XFER_* of interest
347 * Return matching xfer_shift for @xfer_mode.
353 * Matching xfer_shift, -1 if no match found.
355 static int ata_xfer_mode2shift(unsigned int xfer_mode)
357 const struct ata_xfer_ent *ent;
359 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
360 if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits)
366 * ata_mode_string - convert xfer_mask to string
367 * @xfer_mask: mask of bits supported; only highest bit counts.
369 * Determine string which represents the highest speed
370 * (highest bit in @modemask).
376 * Constant C string representing highest speed listed in
377 * @mode_mask, or the constant C string "<n/a>".
379 static const char *ata_mode_string(unsigned int xfer_mask)
381 static const char * const xfer_mode_str[] = {
401 highbit = fls(xfer_mask) - 1;
402 if (highbit >= 0 && highbit < ARRAY_SIZE(xfer_mode_str))
403 return xfer_mode_str[highbit];
407 static const char *sata_spd_string(unsigned int spd)
409 static const char * const spd_str[] = {
414 if (spd == 0 || (spd - 1) >= ARRAY_SIZE(spd_str))
416 return spd_str[spd - 1];
419 void ata_dev_disable(struct ata_device *dev)
421 if (ata_dev_enabled(dev)) {
422 ata_dev_printk(dev, KERN_WARNING, "disabled\n");
428 * ata_pio_devchk - PATA device presence detection
429 * @ap: ATA channel to examine
430 * @device: Device to examine (starting at zero)
432 * This technique was originally described in
433 * Hale Landis's ATADRVR (www.ata-atapi.com), and
434 * later found its way into the ATA/ATAPI spec.
436 * Write a pattern to the ATA shadow registers,
437 * and if a device is present, it will respond by
438 * correctly storing and echoing back the
439 * ATA shadow register contents.
445 static unsigned int ata_pio_devchk(struct ata_port *ap,
448 struct ata_ioports *ioaddr = &ap->ioaddr;
451 ap->ops->dev_select(ap, device);
453 outb(0x55, ioaddr->nsect_addr);
454 outb(0xaa, ioaddr->lbal_addr);
456 outb(0xaa, ioaddr->nsect_addr);
457 outb(0x55, ioaddr->lbal_addr);
459 outb(0x55, ioaddr->nsect_addr);
460 outb(0xaa, ioaddr->lbal_addr);
462 nsect = inb(ioaddr->nsect_addr);
463 lbal = inb(ioaddr->lbal_addr);
465 if ((nsect == 0x55) && (lbal == 0xaa))
466 return 1; /* we found a device */
468 return 0; /* nothing found */
472 * ata_mmio_devchk - PATA device presence detection
473 * @ap: ATA channel to examine
474 * @device: Device to examine (starting at zero)
476 * This technique was originally described in
477 * Hale Landis's ATADRVR (www.ata-atapi.com), and
478 * later found its way into the ATA/ATAPI spec.
480 * Write a pattern to the ATA shadow registers,
481 * and if a device is present, it will respond by
482 * correctly storing and echoing back the
483 * ATA shadow register contents.
489 static unsigned int ata_mmio_devchk(struct ata_port *ap,
492 struct ata_ioports *ioaddr = &ap->ioaddr;
495 ap->ops->dev_select(ap, device);
497 writeb(0x55, (void __iomem *) ioaddr->nsect_addr);
498 writeb(0xaa, (void __iomem *) ioaddr->lbal_addr);
500 writeb(0xaa, (void __iomem *) ioaddr->nsect_addr);
501 writeb(0x55, (void __iomem *) ioaddr->lbal_addr);
503 writeb(0x55, (void __iomem *) ioaddr->nsect_addr);
504 writeb(0xaa, (void __iomem *) ioaddr->lbal_addr);
506 nsect = readb((void __iomem *) ioaddr->nsect_addr);
507 lbal = readb((void __iomem *) ioaddr->lbal_addr);
509 if ((nsect == 0x55) && (lbal == 0xaa))
510 return 1; /* we found a device */
512 return 0; /* nothing found */
516 * ata_devchk - PATA device presence detection
517 * @ap: ATA channel to examine
518 * @device: Device to examine (starting at zero)
520 * Dispatch ATA device presence detection, depending
521 * on whether we are using PIO or MMIO to talk to the
522 * ATA shadow registers.
528 static unsigned int ata_devchk(struct ata_port *ap,
531 if (ap->flags & ATA_FLAG_MMIO)
532 return ata_mmio_devchk(ap, device);
533 return ata_pio_devchk(ap, device);
537 * ata_dev_classify - determine device type based on ATA-spec signature
538 * @tf: ATA taskfile register set for device to be identified
540 * Determine from taskfile register contents whether a device is
541 * ATA or ATAPI, as per "Signature and persistence" section
542 * of ATA/PI spec (volume 1, sect 5.14).
548 * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, or %ATA_DEV_UNKNOWN
549 * the event of failure.
552 unsigned int ata_dev_classify(const struct ata_taskfile *tf)
554 /* Apple's open source Darwin code hints that some devices only
555 * put a proper signature into the LBA mid/high registers,
556 * So, we only check those. It's sufficient for uniqueness.
559 if (((tf->lbam == 0) && (tf->lbah == 0)) ||
560 ((tf->lbam == 0x3c) && (tf->lbah == 0xc3))) {
561 DPRINTK("found ATA device by sig\n");
565 if (((tf->lbam == 0x14) && (tf->lbah == 0xeb)) ||
566 ((tf->lbam == 0x69) && (tf->lbah == 0x96))) {
567 DPRINTK("found ATAPI device by sig\n");
568 return ATA_DEV_ATAPI;
571 DPRINTK("unknown device\n");
572 return ATA_DEV_UNKNOWN;
576 * ata_dev_try_classify - Parse returned ATA device signature
577 * @ap: ATA channel to examine
578 * @device: Device to examine (starting at zero)
579 * @r_err: Value of error register on completion
581 * After an event -- SRST, E.D.D., or SATA COMRESET -- occurs,
582 * an ATA/ATAPI-defined set of values is placed in the ATA
583 * shadow registers, indicating the results of device detection
586 * Select the ATA device, and read the values from the ATA shadow
587 * registers. Then parse according to the Error register value,
588 * and the spec-defined values examined by ata_dev_classify().
594 * Device type - %ATA_DEV_ATA, %ATA_DEV_ATAPI or %ATA_DEV_NONE.
598 ata_dev_try_classify(struct ata_port *ap, unsigned int device, u8 *r_err)
600 struct ata_taskfile tf;
604 ap->ops->dev_select(ap, device);
606 memset(&tf, 0, sizeof(tf));
608 ap->ops->tf_read(ap, &tf);
613 /* see if device passed diags */
616 else if ((device == 0) && (err == 0x81))
621 /* determine if device is ATA or ATAPI */
622 class = ata_dev_classify(&tf);
624 if (class == ATA_DEV_UNKNOWN)
626 if ((class == ATA_DEV_ATA) && (ata_chk_status(ap) == 0))
632 * ata_id_string - Convert IDENTIFY DEVICE page into string
633 * @id: IDENTIFY DEVICE results we will examine
634 * @s: string into which data is output
635 * @ofs: offset into identify device page
636 * @len: length of string to return. must be an even number.
638 * The strings in the IDENTIFY DEVICE page are broken up into
639 * 16-bit chunks. Run through the string, and output each
640 * 8-bit chunk linearly, regardless of platform.
646 void ata_id_string(const u16 *id, unsigned char *s,
647 unsigned int ofs, unsigned int len)
666 * ata_id_c_string - Convert IDENTIFY DEVICE page into C string
667 * @id: IDENTIFY DEVICE results we will examine
668 * @s: string into which data is output
669 * @ofs: offset into identify device page
670 * @len: length of string to return. must be an odd number.
672 * This function is identical to ata_id_string except that it
673 * trims trailing spaces and terminates the resulting string with
674 * null. @len must be actual maximum length (even number) + 1.
679 void ata_id_c_string(const u16 *id, unsigned char *s,
680 unsigned int ofs, unsigned int len)
686 ata_id_string(id, s, ofs, len - 1);
688 p = s + strnlen(s, len - 1);
689 while (p > s && p[-1] == ' ')
694 static u64 ata_id_n_sectors(const u16 *id)
696 if (ata_id_has_lba(id)) {
697 if (ata_id_has_lba48(id))
698 return ata_id_u64(id, 100);
700 return ata_id_u32(id, 60);
702 if (ata_id_current_chs_valid(id))
703 return ata_id_u32(id, 57);
705 return id[1] * id[3] * id[6];
710 * ata_noop_dev_select - Select device 0/1 on ATA bus
711 * @ap: ATA channel to manipulate
712 * @device: ATA device (numbered from zero) to select
714 * This function performs no actual function.
716 * May be used as the dev_select() entry in ata_port_operations.
721 void ata_noop_dev_select (struct ata_port *ap, unsigned int device)
727 * ata_std_dev_select - Select device 0/1 on ATA bus
728 * @ap: ATA channel to manipulate
729 * @device: ATA device (numbered from zero) to select
731 * Use the method defined in the ATA specification to
732 * make either device 0, or device 1, active on the
733 * ATA channel. Works with both PIO and MMIO.
735 * May be used as the dev_select() entry in ata_port_operations.
741 void ata_std_dev_select (struct ata_port *ap, unsigned int device)
746 tmp = ATA_DEVICE_OBS;
748 tmp = ATA_DEVICE_OBS | ATA_DEV1;
750 if (ap->flags & ATA_FLAG_MMIO) {
751 writeb(tmp, (void __iomem *) ap->ioaddr.device_addr);
753 outb(tmp, ap->ioaddr.device_addr);
755 ata_pause(ap); /* needed; also flushes, for mmio */
759 * ata_dev_select - Select device 0/1 on ATA bus
760 * @ap: ATA channel to manipulate
761 * @device: ATA device (numbered from zero) to select
762 * @wait: non-zero to wait for Status register BSY bit to clear
763 * @can_sleep: non-zero if context allows sleeping
765 * Use the method defined in the ATA specification to
766 * make either device 0, or device 1, active on the
769 * This is a high-level version of ata_std_dev_select(),
770 * which additionally provides the services of inserting
771 * the proper pauses and status polling, where needed.
777 void ata_dev_select(struct ata_port *ap, unsigned int device,
778 unsigned int wait, unsigned int can_sleep)
780 VPRINTK("ENTER, ata%u: device %u, wait %u\n",
781 ap->id, device, wait);
786 ap->ops->dev_select(ap, device);
789 if (can_sleep && ap->device[device].class == ATA_DEV_ATAPI)
796 * ata_dump_id - IDENTIFY DEVICE info debugging output
797 * @id: IDENTIFY DEVICE page to dump
799 * Dump selected 16-bit words from the given IDENTIFY DEVICE
806 static inline void ata_dump_id(const u16 *id)
808 DPRINTK("49==0x%04x "
818 DPRINTK("80==0x%04x "
828 DPRINTK("88==0x%04x "
835 * ata_id_xfermask - Compute xfermask from the given IDENTIFY data
836 * @id: IDENTIFY data to compute xfer mask from
838 * Compute the xfermask for this device. This is not as trivial
839 * as it seems if we must consider early devices correctly.
841 * FIXME: pre IDE drive timing (do we care ?).
849 static unsigned int ata_id_xfermask(const u16 *id)
851 unsigned int pio_mask, mwdma_mask, udma_mask;
853 /* Usual case. Word 53 indicates word 64 is valid */
854 if (id[ATA_ID_FIELD_VALID] & (1 << 1)) {
855 pio_mask = id[ATA_ID_PIO_MODES] & 0x03;
859 /* If word 64 isn't valid then Word 51 high byte holds
860 * the PIO timing number for the maximum. Turn it into
863 pio_mask = (2 << (id[ATA_ID_OLD_PIO_MODES] & 0xFF)) - 1 ;
865 /* But wait.. there's more. Design your standards by
866 * committee and you too can get a free iordy field to
867 * process. However its the speeds not the modes that
868 * are supported... Note drivers using the timing API
869 * will get this right anyway
873 mwdma_mask = id[ATA_ID_MWDMA_MODES] & 0x07;
876 if (id[ATA_ID_FIELD_VALID] & (1 << 2))
877 udma_mask = id[ATA_ID_UDMA_MODES] & 0xff;
879 return ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask);
883 * ata_port_queue_task - Queue port_task
884 * @ap: The ata_port to queue port_task for
885 * @fn: workqueue function to be scheduled
886 * @data: data value to pass to workqueue function
887 * @delay: delay time for workqueue function
889 * Schedule @fn(@data) for execution after @delay jiffies using
890 * port_task. There is one port_task per port and it's the
891 * user(low level driver)'s responsibility to make sure that only
892 * one task is active at any given time.
894 * libata core layer takes care of synchronization between
895 * port_task and EH. ata_port_queue_task() may be ignored for EH
899 * Inherited from caller.
901 void ata_port_queue_task(struct ata_port *ap, void (*fn)(void *), void *data,
906 if (ap->flags & ATA_FLAG_FLUSH_PORT_TASK)
909 PREPARE_WORK(&ap->port_task, fn, data);
912 rc = queue_work(ata_wq, &ap->port_task);
914 rc = queue_delayed_work(ata_wq, &ap->port_task, delay);
916 /* rc == 0 means that another user is using port task */
921 * ata_port_flush_task - Flush port_task
922 * @ap: The ata_port to flush port_task for
924 * After this function completes, port_task is guranteed not to
925 * be running or scheduled.
928 * Kernel thread context (may sleep)
930 void ata_port_flush_task(struct ata_port *ap)
936 spin_lock_irqsave(&ap->host_set->lock, flags);
937 ap->flags |= ATA_FLAG_FLUSH_PORT_TASK;
938 spin_unlock_irqrestore(&ap->host_set->lock, flags);
940 DPRINTK("flush #1\n");
941 flush_workqueue(ata_wq);
944 * At this point, if a task is running, it's guaranteed to see
945 * the FLUSH flag; thus, it will never queue pio tasks again.
948 if (!cancel_delayed_work(&ap->port_task)) {
949 DPRINTK("flush #2\n");
950 flush_workqueue(ata_wq);
953 spin_lock_irqsave(&ap->host_set->lock, flags);
954 ap->flags &= ~ATA_FLAG_FLUSH_PORT_TASK;
955 spin_unlock_irqrestore(&ap->host_set->lock, flags);
960 void ata_qc_complete_internal(struct ata_queued_cmd *qc)
962 struct completion *waiting = qc->private_data;
968 * ata_exec_internal - execute libata internal command
969 * @dev: Device to which the command is sent
970 * @tf: Taskfile registers for the command and the result
971 * @cdb: CDB for packet command
972 * @dma_dir: Data tranfer direction of the command
973 * @buf: Data buffer of the command
974 * @buflen: Length of data buffer
976 * Executes libata internal command with timeout. @tf contains
977 * command on entry and result on return. Timeout and error
978 * conditions are reported via return value. No recovery action
979 * is taken after a command times out. It's caller's duty to
980 * clean up after timeout.
983 * None. Should be called with kernel context, might sleep.
986 unsigned ata_exec_internal(struct ata_device *dev,
987 struct ata_taskfile *tf, const u8 *cdb,
988 int dma_dir, void *buf, unsigned int buflen)
990 struct ata_port *ap = dev->ap;
991 u8 command = tf->command;
992 struct ata_queued_cmd *qc;
993 unsigned int tag, preempted_tag;
994 u32 preempted_sactive, preempted_qc_active;
995 DECLARE_COMPLETION(wait);
997 unsigned int err_mask;
1000 spin_lock_irqsave(&ap->host_set->lock, flags);
1002 /* no internal command while frozen */
1003 if (ap->flags & ATA_FLAG_FROZEN) {
1004 spin_unlock_irqrestore(&ap->host_set->lock, flags);
1005 return AC_ERR_SYSTEM;
1008 /* initialize internal qc */
1010 /* XXX: Tag 0 is used for drivers with legacy EH as some
1011 * drivers choke if any other tag is given. This breaks
1012 * ata_tag_internal() test for those drivers. Don't use new
1013 * EH stuff without converting to it.
1015 if (ap->ops->error_handler)
1016 tag = ATA_TAG_INTERNAL;
1020 if (test_and_set_bit(tag, &ap->qc_allocated))
1022 qc = __ata_qc_from_tag(ap, tag);
1030 preempted_tag = ap->active_tag;
1031 preempted_sactive = ap->sactive;
1032 preempted_qc_active = ap->qc_active;
1033 ap->active_tag = ATA_TAG_POISON;
1037 /* prepare & issue qc */
1040 memcpy(qc->cdb, cdb, ATAPI_CDB_LEN);
1041 qc->flags |= ATA_QCFLAG_RESULT_TF;
1042 qc->dma_dir = dma_dir;
1043 if (dma_dir != DMA_NONE) {
1044 ata_sg_init_one(qc, buf, buflen);
1045 qc->nsect = buflen / ATA_SECT_SIZE;
1048 qc->private_data = &wait;
1049 qc->complete_fn = ata_qc_complete_internal;
1053 spin_unlock_irqrestore(&ap->host_set->lock, flags);
1055 rc = wait_for_completion_timeout(&wait, ATA_TMOUT_INTERNAL);
1057 ata_port_flush_task(ap);
1060 spin_lock_irqsave(&ap->host_set->lock, flags);
1062 /* We're racing with irq here. If we lose, the
1063 * following test prevents us from completing the qc
1064 * twice. If we win, the port is frozen and will be
1065 * cleaned up by ->post_internal_cmd().
1067 if (qc->flags & ATA_QCFLAG_ACTIVE) {
1068 qc->err_mask |= AC_ERR_TIMEOUT;
1070 if (ap->ops->error_handler)
1071 ata_port_freeze(ap);
1073 ata_qc_complete(qc);
1075 ata_dev_printk(dev, KERN_WARNING,
1076 "qc timeout (cmd 0x%x)\n", command);
1079 spin_unlock_irqrestore(&ap->host_set->lock, flags);
1082 /* do post_internal_cmd */
1083 if (ap->ops->post_internal_cmd)
1084 ap->ops->post_internal_cmd(qc);
1086 if (qc->flags & ATA_QCFLAG_FAILED && !qc->err_mask) {
1087 ata_dev_printk(dev, KERN_WARNING, "zero err_mask for failed "
1088 "internal command, assuming AC_ERR_OTHER\n");
1089 qc->err_mask |= AC_ERR_OTHER;
1093 spin_lock_irqsave(&ap->host_set->lock, flags);
1095 *tf = qc->result_tf;
1096 err_mask = qc->err_mask;
1099 ap->active_tag = preempted_tag;
1100 ap->sactive = preempted_sactive;
1101 ap->qc_active = preempted_qc_active;
1103 /* XXX - Some LLDDs (sata_mv) disable port on command failure.
1104 * Until those drivers are fixed, we detect the condition
1105 * here, fail the command with AC_ERR_SYSTEM and reenable the
1108 * Note that this doesn't change any behavior as internal
1109 * command failure results in disabling the device in the
1110 * higher layer for LLDDs without new reset/EH callbacks.
1112 * Kill the following code as soon as those drivers are fixed.
1114 if (ap->flags & ATA_FLAG_DISABLED) {
1115 err_mask |= AC_ERR_SYSTEM;
1119 spin_unlock_irqrestore(&ap->host_set->lock, flags);
1125 * ata_pio_need_iordy - check if iordy needed
1128 * Check if the current speed of the device requires IORDY. Used
1129 * by various controllers for chip configuration.
1132 unsigned int ata_pio_need_iordy(const struct ata_device *adev)
1135 int speed = adev->pio_mode - XFER_PIO_0;
1142 /* If we have no drive specific rule, then PIO 2 is non IORDY */
1144 if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE */
1145 pio = adev->id[ATA_ID_EIDE_PIO];
1146 /* Is the speed faster than the drive allows non IORDY ? */
1148 /* This is cycle times not frequency - watch the logic! */
1149 if (pio > 240) /* PIO2 is 240nS per cycle */
1158 * ata_dev_read_id - Read ID data from the specified device
1159 * @dev: target device
1160 * @p_class: pointer to class of the target device (may be changed)
1161 * @post_reset: is this read ID post-reset?
1162 * @id: buffer to read IDENTIFY data into
1164 * Read ID data from the specified device. ATA_CMD_ID_ATA is
1165 * performed on ATA devices and ATA_CMD_ID_ATAPI on ATAPI
1166 * devices. This function also issues ATA_CMD_INIT_DEV_PARAMS
1167 * for pre-ATA4 drives.
1170 * Kernel thread context (may sleep)
1173 * 0 on success, -errno otherwise.
1175 int ata_dev_read_id(struct ata_device *dev, unsigned int *p_class,
1176 int post_reset, u16 *id)
1178 struct ata_port *ap = dev->ap;
1179 unsigned int class = *p_class;
1180 struct ata_taskfile tf;
1181 unsigned int err_mask = 0;
1185 DPRINTK("ENTER, host %u, dev %u\n", ap->id, dev->devno);
1187 ata_dev_select(ap, dev->devno, 1, 1); /* select device 0/1 */
1190 ata_tf_init(dev, &tf);
1194 tf.command = ATA_CMD_ID_ATA;
1197 tf.command = ATA_CMD_ID_ATAPI;
1201 reason = "unsupported class";
1205 tf.protocol = ATA_PROT_PIO;
1207 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_FROM_DEVICE,
1208 id, sizeof(id[0]) * ATA_ID_WORDS);
1211 reason = "I/O error";
1215 swap_buf_le16(id, ATA_ID_WORDS);
1218 if ((class == ATA_DEV_ATA) != (ata_id_is_ata(id) | ata_id_is_cfa(id))) {
1220 reason = "device reports illegal type";
1224 if (post_reset && class == ATA_DEV_ATA) {
1226 * The exact sequence expected by certain pre-ATA4 drives is:
1229 * INITIALIZE DEVICE PARAMETERS
1231 * Some drives were very specific about that exact sequence.
1233 if (ata_id_major_version(id) < 4 || !ata_id_has_lba(id)) {
1234 err_mask = ata_dev_init_params(dev, id[3], id[6]);
1237 reason = "INIT_DEV_PARAMS failed";
1241 /* current CHS translation info (id[53-58]) might be
1242 * changed. reread the identify device info.
1254 ata_dev_printk(dev, KERN_WARNING, "failed to IDENTIFY "
1255 "(%s, err_mask=0x%x)\n", reason, err_mask);
1259 static inline u8 ata_dev_knobble(struct ata_device *dev)
1261 return ((dev->ap->cbl == ATA_CBL_SATA) && (!ata_id_is_sata(dev->id)));
1264 static void ata_dev_config_ncq(struct ata_device *dev,
1265 char *desc, size_t desc_sz)
1267 struct ata_port *ap = dev->ap;
1268 int hdepth = 0, ddepth = ata_id_queue_depth(dev->id);
1270 if (!ata_id_has_ncq(dev->id)) {
1275 if (ap->flags & ATA_FLAG_NCQ) {
1276 hdepth = min(ap->host->can_queue, ATA_MAX_QUEUE - 1);
1277 dev->flags |= ATA_DFLAG_NCQ;
1280 if (hdepth >= ddepth)
1281 snprintf(desc, desc_sz, "NCQ (depth %d)", ddepth);
1283 snprintf(desc, desc_sz, "NCQ (depth %d/%d)", hdepth, ddepth);
1287 * ata_dev_configure - Configure the specified ATA/ATAPI device
1288 * @dev: Target device to configure
1289 * @print_info: Enable device info printout
1291 * Configure @dev according to @dev->id. Generic and low-level
1292 * driver specific fixups are also applied.
1295 * Kernel thread context (may sleep)
1298 * 0 on success, -errno otherwise
1300 int ata_dev_configure(struct ata_device *dev, int print_info)
1302 struct ata_port *ap = dev->ap;
1303 const u16 *id = dev->id;
1304 unsigned int xfer_mask;
1307 if (!ata_dev_enabled(dev)) {
1308 DPRINTK("ENTER/EXIT (host %u, dev %u) -- nodev\n",
1309 ap->id, dev->devno);
1313 DPRINTK("ENTER, host %u, dev %u\n", ap->id, dev->devno);
1315 /* print device capabilities */
1317 ata_dev_printk(dev, KERN_DEBUG, "cfg 49:%04x 82:%04x 83:%04x "
1318 "84:%04x 85:%04x 86:%04x 87:%04x 88:%04x\n",
1319 id[49], id[82], id[83], id[84],
1320 id[85], id[86], id[87], id[88]);
1322 /* initialize to-be-configured parameters */
1323 dev->flags &= ~ATA_DFLAG_CFG_MASK;
1324 dev->max_sectors = 0;
1332 * common ATA, ATAPI feature tests
1335 /* find max transfer mode; for printk only */
1336 xfer_mask = ata_id_xfermask(id);
1340 /* ATA-specific feature tests */
1341 if (dev->class == ATA_DEV_ATA) {
1342 dev->n_sectors = ata_id_n_sectors(id);
1344 if (ata_id_has_lba(id)) {
1345 const char *lba_desc;
1349 dev->flags |= ATA_DFLAG_LBA;
1350 if (ata_id_has_lba48(id)) {
1351 dev->flags |= ATA_DFLAG_LBA48;
1356 ata_dev_config_ncq(dev, ncq_desc, sizeof(ncq_desc));
1358 /* print device info to dmesg */
1360 ata_dev_printk(dev, KERN_INFO, "ATA-%d, "
1361 "max %s, %Lu sectors: %s %s\n",
1362 ata_id_major_version(id),
1363 ata_mode_string(xfer_mask),
1364 (unsigned long long)dev->n_sectors,
1365 lba_desc, ncq_desc);
1369 /* Default translation */
1370 dev->cylinders = id[1];
1372 dev->sectors = id[6];
1374 if (ata_id_current_chs_valid(id)) {
1375 /* Current CHS translation is valid. */
1376 dev->cylinders = id[54];
1377 dev->heads = id[55];
1378 dev->sectors = id[56];
1381 /* print device info to dmesg */
1383 ata_dev_printk(dev, KERN_INFO, "ATA-%d, "
1384 "max %s, %Lu sectors: CHS %u/%u/%u\n",
1385 ata_id_major_version(id),
1386 ata_mode_string(xfer_mask),
1387 (unsigned long long)dev->n_sectors,
1388 dev->cylinders, dev->heads, dev->sectors);
1391 if (dev->id[59] & 0x100) {
1392 dev->multi_count = dev->id[59] & 0xff;
1393 DPRINTK("ata%u: dev %u multi count %u\n",
1394 ap->id, dev->devno, dev->multi_count);
1400 /* ATAPI-specific feature tests */
1401 else if (dev->class == ATA_DEV_ATAPI) {
1402 char *cdb_intr_string = "";
1404 rc = atapi_cdb_len(id);
1405 if ((rc < 12) || (rc > ATAPI_CDB_LEN)) {
1406 ata_dev_printk(dev, KERN_WARNING,
1407 "unsupported CDB len\n");
1411 dev->cdb_len = (unsigned int) rc;
1413 if (ata_id_cdb_intr(dev->id)) {
1414 dev->flags |= ATA_DFLAG_CDB_INTR;
1415 cdb_intr_string = ", CDB intr";
1418 /* print device info to dmesg */
1420 ata_dev_printk(dev, KERN_INFO, "ATAPI, max %s%s\n",
1421 ata_mode_string(xfer_mask),
1425 ap->host->max_cmd_len = 0;
1426 for (i = 0; i < ATA_MAX_DEVICES; i++)
1427 ap->host->max_cmd_len = max_t(unsigned int,
1428 ap->host->max_cmd_len,
1429 ap->device[i].cdb_len);
1431 /* limit bridge transfers to udma5, 200 sectors */
1432 if (ata_dev_knobble(dev)) {
1434 ata_dev_printk(dev, KERN_INFO,
1435 "applying bridge limits\n");
1436 dev->udma_mask &= ATA_UDMA5;
1437 dev->max_sectors = ATA_MAX_SECTORS;
1440 if (ap->ops->dev_config)
1441 ap->ops->dev_config(ap, dev);
1443 DPRINTK("EXIT, drv_stat = 0x%x\n", ata_chk_status(ap));
1447 DPRINTK("EXIT, err\n");
1452 * ata_bus_probe - Reset and probe ATA bus
1455 * Master ATA bus probing function. Initiates a hardware-dependent
1456 * bus reset, then attempts to identify any devices found on
1460 * PCI/etc. bus probe sem.
1463 * Zero on success, negative errno otherwise.
1466 static int ata_bus_probe(struct ata_port *ap)
1468 unsigned int classes[ATA_MAX_DEVICES];
1469 int tries[ATA_MAX_DEVICES];
1470 int i, rc, down_xfermask;
1471 struct ata_device *dev;
1475 for (i = 0; i < ATA_MAX_DEVICES; i++)
1476 tries[i] = ATA_PROBE_MAX_TRIES;
1481 /* reset and determine device classes */
1482 for (i = 0; i < ATA_MAX_DEVICES; i++)
1483 classes[i] = ATA_DEV_UNKNOWN;
1485 if (ap->ops->probe_reset) {
1486 rc = ap->ops->probe_reset(ap, classes);
1488 ata_port_printk(ap, KERN_ERR,
1489 "reset failed (errno=%d)\n", rc);
1493 ap->ops->phy_reset(ap);
1495 for (i = 0; i < ATA_MAX_DEVICES; i++) {
1496 if (!(ap->flags & ATA_FLAG_DISABLED))
1497 classes[i] = ap->device[i].class;
1498 ap->device[i].class = ATA_DEV_UNKNOWN;
1504 for (i = 0; i < ATA_MAX_DEVICES; i++)
1505 if (classes[i] == ATA_DEV_UNKNOWN)
1506 classes[i] = ATA_DEV_NONE;
1508 /* after the reset the device state is PIO 0 and the controller
1509 state is undefined. Record the mode */
1511 for (i = 0; i < ATA_MAX_DEVICES; i++)
1512 ap->device[i].pio_mode = XFER_PIO_0;
1514 /* read IDENTIFY page and configure devices */
1515 for (i = 0; i < ATA_MAX_DEVICES; i++) {
1516 dev = &ap->device[i];
1519 dev->class = classes[i];
1521 if (!ata_dev_enabled(dev))
1524 rc = ata_dev_read_id(dev, &dev->class, 1, dev->id);
1528 rc = ata_dev_configure(dev, 1);
1533 /* configure transfer mode */
1534 rc = ata_set_mode(ap, &dev);
1540 for (i = 0; i < ATA_MAX_DEVICES; i++)
1541 if (ata_dev_enabled(&ap->device[i]))
1544 /* no device present, disable port */
1545 ata_port_disable(ap);
1546 ap->ops->port_disable(ap);
1553 tries[dev->devno] = 0;
1556 sata_down_spd_limit(ap);
1559 tries[dev->devno]--;
1560 if (down_xfermask &&
1561 ata_down_xfermask_limit(dev, tries[dev->devno] == 1))
1562 tries[dev->devno] = 0;
1565 if (!tries[dev->devno]) {
1566 ata_down_xfermask_limit(dev, 1);
1567 ata_dev_disable(dev);
1574 * ata_port_probe - Mark port as enabled
1575 * @ap: Port for which we indicate enablement
1577 * Modify @ap data structure such that the system
1578 * thinks that the entire port is enabled.
1580 * LOCKING: host_set lock, or some other form of
1584 void ata_port_probe(struct ata_port *ap)
1586 ap->flags &= ~ATA_FLAG_DISABLED;
1590 * sata_print_link_status - Print SATA link status
1591 * @ap: SATA port to printk link status about
1593 * This function prints link speed and status of a SATA link.
1598 static void sata_print_link_status(struct ata_port *ap)
1600 u32 sstatus, scontrol, tmp;
1602 if (sata_scr_read(ap, SCR_STATUS, &sstatus))
1604 sata_scr_read(ap, SCR_CONTROL, &scontrol);
1606 if (ata_port_online(ap)) {
1607 tmp = (sstatus >> 4) & 0xf;
1608 ata_port_printk(ap, KERN_INFO,
1609 "SATA link up %s (SStatus %X SControl %X)\n",
1610 sata_spd_string(tmp), sstatus, scontrol);
1612 ata_port_printk(ap, KERN_INFO,
1613 "SATA link down (SStatus %X SControl %X)\n",
1619 * __sata_phy_reset - Wake/reset a low-level SATA PHY
1620 * @ap: SATA port associated with target SATA PHY.
1622 * This function issues commands to standard SATA Sxxx
1623 * PHY registers, to wake up the phy (and device), and
1624 * clear any reset condition.
1627 * PCI/etc. bus probe sem.
1630 void __sata_phy_reset(struct ata_port *ap)
1633 unsigned long timeout = jiffies + (HZ * 5);
1635 if (ap->flags & ATA_FLAG_SATA_RESET) {
1636 /* issue phy wake/reset */
1637 sata_scr_write_flush(ap, SCR_CONTROL, 0x301);
1638 /* Couldn't find anything in SATA I/II specs, but
1639 * AHCI-1.1 10.4.2 says at least 1 ms. */
1642 /* phy wake/clear reset */
1643 sata_scr_write_flush(ap, SCR_CONTROL, 0x300);
1645 /* wait for phy to become ready, if necessary */
1648 sata_scr_read(ap, SCR_STATUS, &sstatus);
1649 if ((sstatus & 0xf) != 1)
1651 } while (time_before(jiffies, timeout));
1653 /* print link status */
1654 sata_print_link_status(ap);
1656 /* TODO: phy layer with polling, timeouts, etc. */
1657 if (!ata_port_offline(ap))
1660 ata_port_disable(ap);
1662 if (ap->flags & ATA_FLAG_DISABLED)
1665 if (ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT)) {
1666 ata_port_disable(ap);
1670 ap->cbl = ATA_CBL_SATA;
1674 * sata_phy_reset - Reset SATA bus.
1675 * @ap: SATA port associated with target SATA PHY.
1677 * This function resets the SATA bus, and then probes
1678 * the bus for devices.
1681 * PCI/etc. bus probe sem.
1684 void sata_phy_reset(struct ata_port *ap)
1686 __sata_phy_reset(ap);
1687 if (ap->flags & ATA_FLAG_DISABLED)
1693 * ata_dev_pair - return other device on cable
1696 * Obtain the other device on the same cable, or if none is
1697 * present NULL is returned
1700 struct ata_device *ata_dev_pair(struct ata_device *adev)
1702 struct ata_port *ap = adev->ap;
1703 struct ata_device *pair = &ap->device[1 - adev->devno];
1704 if (!ata_dev_enabled(pair))
1710 * ata_port_disable - Disable port.
1711 * @ap: Port to be disabled.
1713 * Modify @ap data structure such that the system
1714 * thinks that the entire port is disabled, and should
1715 * never attempt to probe or communicate with devices
1718 * LOCKING: host_set lock, or some other form of
1722 void ata_port_disable(struct ata_port *ap)
1724 ap->device[0].class = ATA_DEV_NONE;
1725 ap->device[1].class = ATA_DEV_NONE;
1726 ap->flags |= ATA_FLAG_DISABLED;
1730 * sata_down_spd_limit - adjust SATA spd limit downward
1731 * @ap: Port to adjust SATA spd limit for
1733 * Adjust SATA spd limit of @ap downward. Note that this
1734 * function only adjusts the limit. The change must be applied
1735 * using sata_set_spd().
1738 * Inherited from caller.
1741 * 0 on success, negative errno on failure
1743 int sata_down_spd_limit(struct ata_port *ap)
1745 u32 sstatus, spd, mask;
1748 rc = sata_scr_read(ap, SCR_STATUS, &sstatus);
1752 mask = ap->sata_spd_limit;
1755 highbit = fls(mask) - 1;
1756 mask &= ~(1 << highbit);
1758 spd = (sstatus >> 4) & 0xf;
1762 mask &= (1 << spd) - 1;
1766 ap->sata_spd_limit = mask;
1768 ata_port_printk(ap, KERN_WARNING, "limiting SATA link speed to %s\n",
1769 sata_spd_string(fls(mask)));
1774 static int __sata_set_spd_needed(struct ata_port *ap, u32 *scontrol)
1778 if (ap->sata_spd_limit == UINT_MAX)
1781 limit = fls(ap->sata_spd_limit);
1783 spd = (*scontrol >> 4) & 0xf;
1784 *scontrol = (*scontrol & ~0xf0) | ((limit & 0xf) << 4);
1786 return spd != limit;
1790 * sata_set_spd_needed - is SATA spd configuration needed
1791 * @ap: Port in question
1793 * Test whether the spd limit in SControl matches
1794 * @ap->sata_spd_limit. This function is used to determine
1795 * whether hardreset is necessary to apply SATA spd
1799 * Inherited from caller.
1802 * 1 if SATA spd configuration is needed, 0 otherwise.
1804 int sata_set_spd_needed(struct ata_port *ap)
1808 if (sata_scr_read(ap, SCR_CONTROL, &scontrol))
1811 return __sata_set_spd_needed(ap, &scontrol);
1815 * sata_set_spd - set SATA spd according to spd limit
1816 * @ap: Port to set SATA spd for
1818 * Set SATA spd of @ap according to sata_spd_limit.
1821 * Inherited from caller.
1824 * 0 if spd doesn't need to be changed, 1 if spd has been
1825 * changed. Negative errno if SCR registers are inaccessible.
1827 int sata_set_spd(struct ata_port *ap)
1832 if ((rc = sata_scr_read(ap, SCR_CONTROL, &scontrol)))
1835 if (!__sata_set_spd_needed(ap, &scontrol))
1838 if ((rc = sata_scr_write(ap, SCR_CONTROL, scontrol)))
1845 * This mode timing computation functionality is ported over from
1846 * drivers/ide/ide-timing.h and was originally written by Vojtech Pavlik
1849 * PIO 0-5, MWDMA 0-2 and UDMA 0-6 timings (in nanoseconds).
1850 * These were taken from ATA/ATAPI-6 standard, rev 0a, except
1851 * for PIO 5, which is a nonstandard extension and UDMA6, which
1852 * is currently supported only by Maxtor drives.
1855 static const struct ata_timing ata_timing[] = {
1857 { XFER_UDMA_6, 0, 0, 0, 0, 0, 0, 0, 15 },
1858 { XFER_UDMA_5, 0, 0, 0, 0, 0, 0, 0, 20 },
1859 { XFER_UDMA_4, 0, 0, 0, 0, 0, 0, 0, 30 },
1860 { XFER_UDMA_3, 0, 0, 0, 0, 0, 0, 0, 45 },
1862 { XFER_UDMA_2, 0, 0, 0, 0, 0, 0, 0, 60 },
1863 { XFER_UDMA_1, 0, 0, 0, 0, 0, 0, 0, 80 },
1864 { XFER_UDMA_0, 0, 0, 0, 0, 0, 0, 0, 120 },
1866 /* { XFER_UDMA_SLOW, 0, 0, 0, 0, 0, 0, 0, 150 }, */
1868 { XFER_MW_DMA_2, 25, 0, 0, 0, 70, 25, 120, 0 },
1869 { XFER_MW_DMA_1, 45, 0, 0, 0, 80, 50, 150, 0 },
1870 { XFER_MW_DMA_0, 60, 0, 0, 0, 215, 215, 480, 0 },
1872 { XFER_SW_DMA_2, 60, 0, 0, 0, 120, 120, 240, 0 },
1873 { XFER_SW_DMA_1, 90, 0, 0, 0, 240, 240, 480, 0 },
1874 { XFER_SW_DMA_0, 120, 0, 0, 0, 480, 480, 960, 0 },
1876 /* { XFER_PIO_5, 20, 50, 30, 100, 50, 30, 100, 0 }, */
1877 { XFER_PIO_4, 25, 70, 25, 120, 70, 25, 120, 0 },
1878 { XFER_PIO_3, 30, 80, 70, 180, 80, 70, 180, 0 },
1880 { XFER_PIO_2, 30, 290, 40, 330, 100, 90, 240, 0 },
1881 { XFER_PIO_1, 50, 290, 93, 383, 125, 100, 383, 0 },
1882 { XFER_PIO_0, 70, 290, 240, 600, 165, 150, 600, 0 },
1884 /* { XFER_PIO_SLOW, 120, 290, 240, 960, 290, 240, 960, 0 }, */
1889 #define ENOUGH(v,unit) (((v)-1)/(unit)+1)
1890 #define EZ(v,unit) ((v)?ENOUGH(v,unit):0)
1892 static void ata_timing_quantize(const struct ata_timing *t, struct ata_timing *q, int T, int UT)
1894 q->setup = EZ(t->setup * 1000, T);
1895 q->act8b = EZ(t->act8b * 1000, T);
1896 q->rec8b = EZ(t->rec8b * 1000, T);
1897 q->cyc8b = EZ(t->cyc8b * 1000, T);
1898 q->active = EZ(t->active * 1000, T);
1899 q->recover = EZ(t->recover * 1000, T);
1900 q->cycle = EZ(t->cycle * 1000, T);
1901 q->udma = EZ(t->udma * 1000, UT);
1904 void ata_timing_merge(const struct ata_timing *a, const struct ata_timing *b,
1905 struct ata_timing *m, unsigned int what)
1907 if (what & ATA_TIMING_SETUP ) m->setup = max(a->setup, b->setup);
1908 if (what & ATA_TIMING_ACT8B ) m->act8b = max(a->act8b, b->act8b);
1909 if (what & ATA_TIMING_REC8B ) m->rec8b = max(a->rec8b, b->rec8b);
1910 if (what & ATA_TIMING_CYC8B ) m->cyc8b = max(a->cyc8b, b->cyc8b);
1911 if (what & ATA_TIMING_ACTIVE ) m->active = max(a->active, b->active);
1912 if (what & ATA_TIMING_RECOVER) m->recover = max(a->recover, b->recover);
1913 if (what & ATA_TIMING_CYCLE ) m->cycle = max(a->cycle, b->cycle);
1914 if (what & ATA_TIMING_UDMA ) m->udma = max(a->udma, b->udma);
1917 static const struct ata_timing* ata_timing_find_mode(unsigned short speed)
1919 const struct ata_timing *t;
1921 for (t = ata_timing; t->mode != speed; t++)
1922 if (t->mode == 0xFF)
1927 int ata_timing_compute(struct ata_device *adev, unsigned short speed,
1928 struct ata_timing *t, int T, int UT)
1930 const struct ata_timing *s;
1931 struct ata_timing p;
1937 if (!(s = ata_timing_find_mode(speed)))
1940 memcpy(t, s, sizeof(*s));
1943 * If the drive is an EIDE drive, it can tell us it needs extended
1944 * PIO/MW_DMA cycle timing.
1947 if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE drive */
1948 memset(&p, 0, sizeof(p));
1949 if(speed >= XFER_PIO_0 && speed <= XFER_SW_DMA_0) {
1950 if (speed <= XFER_PIO_2) p.cycle = p.cyc8b = adev->id[ATA_ID_EIDE_PIO];
1951 else p.cycle = p.cyc8b = adev->id[ATA_ID_EIDE_PIO_IORDY];
1952 } else if(speed >= XFER_MW_DMA_0 && speed <= XFER_MW_DMA_2) {
1953 p.cycle = adev->id[ATA_ID_EIDE_DMA_MIN];
1955 ata_timing_merge(&p, t, t, ATA_TIMING_CYCLE | ATA_TIMING_CYC8B);
1959 * Convert the timing to bus clock counts.
1962 ata_timing_quantize(t, t, T, UT);
1965 * Even in DMA/UDMA modes we still use PIO access for IDENTIFY,
1966 * S.M.A.R.T * and some other commands. We have to ensure that the
1967 * DMA cycle timing is slower/equal than the fastest PIO timing.
1970 if (speed > XFER_PIO_4) {
1971 ata_timing_compute(adev, adev->pio_mode, &p, T, UT);
1972 ata_timing_merge(&p, t, t, ATA_TIMING_ALL);
1976 * Lengthen active & recovery time so that cycle time is correct.
1979 if (t->act8b + t->rec8b < t->cyc8b) {
1980 t->act8b += (t->cyc8b - (t->act8b + t->rec8b)) / 2;
1981 t->rec8b = t->cyc8b - t->act8b;
1984 if (t->active + t->recover < t->cycle) {
1985 t->active += (t->cycle - (t->active + t->recover)) / 2;
1986 t->recover = t->cycle - t->active;
1993 * ata_down_xfermask_limit - adjust dev xfer masks downward
1994 * @dev: Device to adjust xfer masks
1995 * @force_pio0: Force PIO0
1997 * Adjust xfer masks of @dev downward. Note that this function
1998 * does not apply the change. Invoking ata_set_mode() afterwards
1999 * will apply the limit.
2002 * Inherited from caller.
2005 * 0 on success, negative errno on failure
2007 int ata_down_xfermask_limit(struct ata_device *dev, int force_pio0)
2009 unsigned long xfer_mask;
2012 xfer_mask = ata_pack_xfermask(dev->pio_mask, dev->mwdma_mask,
2017 /* don't gear down to MWDMA from UDMA, go directly to PIO */
2018 if (xfer_mask & ATA_MASK_UDMA)
2019 xfer_mask &= ~ATA_MASK_MWDMA;
2021 highbit = fls(xfer_mask) - 1;
2022 xfer_mask &= ~(1 << highbit);
2024 xfer_mask &= 1 << ATA_SHIFT_PIO;
2028 ata_unpack_xfermask(xfer_mask, &dev->pio_mask, &dev->mwdma_mask,
2031 ata_dev_printk(dev, KERN_WARNING, "limiting speed to %s\n",
2032 ata_mode_string(xfer_mask));
2040 static int ata_dev_set_mode(struct ata_device *dev)
2042 unsigned int err_mask;
2045 dev->flags &= ~ATA_DFLAG_PIO;
2046 if (dev->xfer_shift == ATA_SHIFT_PIO)
2047 dev->flags |= ATA_DFLAG_PIO;
2049 err_mask = ata_dev_set_xfermode(dev);
2051 ata_dev_printk(dev, KERN_ERR, "failed to set xfermode "
2052 "(err_mask=0x%x)\n", err_mask);
2056 rc = ata_dev_revalidate(dev, 0);
2060 DPRINTK("xfer_shift=%u, xfer_mode=0x%x\n",
2061 dev->xfer_shift, (int)dev->xfer_mode);
2063 ata_dev_printk(dev, KERN_INFO, "configured for %s\n",
2064 ata_mode_string(ata_xfer_mode2mask(dev->xfer_mode)));
2069 * ata_set_mode - Program timings and issue SET FEATURES - XFER
2070 * @ap: port on which timings will be programmed
2071 * @r_failed_dev: out paramter for failed device
2073 * Set ATA device disk transfer mode (PIO3, UDMA6, etc.). If
2074 * ata_set_mode() fails, pointer to the failing device is
2075 * returned in @r_failed_dev.
2078 * PCI/etc. bus probe sem.
2081 * 0 on success, negative errno otherwise
2083 int ata_set_mode(struct ata_port *ap, struct ata_device **r_failed_dev)
2085 struct ata_device *dev;
2086 int i, rc = 0, used_dma = 0, found = 0;
2088 /* has private set_mode? */
2089 if (ap->ops->set_mode) {
2090 /* FIXME: make ->set_mode handle no device case and
2091 * return error code and failing device on failure.
2093 for (i = 0; i < ATA_MAX_DEVICES; i++) {
2094 if (ata_dev_enabled(&ap->device[i])) {
2095 ap->ops->set_mode(ap);
2102 /* step 1: calculate xfer_mask */
2103 for (i = 0; i < ATA_MAX_DEVICES; i++) {
2104 unsigned int pio_mask, dma_mask;
2106 dev = &ap->device[i];
2108 if (!ata_dev_enabled(dev))
2111 ata_dev_xfermask(dev);
2113 pio_mask = ata_pack_xfermask(dev->pio_mask, 0, 0);
2114 dma_mask = ata_pack_xfermask(0, dev->mwdma_mask, dev->udma_mask);
2115 dev->pio_mode = ata_xfer_mask2mode(pio_mask);
2116 dev->dma_mode = ata_xfer_mask2mode(dma_mask);
2125 /* step 2: always set host PIO timings */
2126 for (i = 0; i < ATA_MAX_DEVICES; i++) {
2127 dev = &ap->device[i];
2128 if (!ata_dev_enabled(dev))
2131 if (!dev->pio_mode) {
2132 ata_dev_printk(dev, KERN_WARNING, "no PIO support\n");
2137 dev->xfer_mode = dev->pio_mode;
2138 dev->xfer_shift = ATA_SHIFT_PIO;
2139 if (ap->ops->set_piomode)
2140 ap->ops->set_piomode(ap, dev);
2143 /* step 3: set host DMA timings */
2144 for (i = 0; i < ATA_MAX_DEVICES; i++) {
2145 dev = &ap->device[i];
2147 if (!ata_dev_enabled(dev) || !dev->dma_mode)
2150 dev->xfer_mode = dev->dma_mode;
2151 dev->xfer_shift = ata_xfer_mode2shift(dev->dma_mode);
2152 if (ap->ops->set_dmamode)
2153 ap->ops->set_dmamode(ap, dev);
2156 /* step 4: update devices' xfer mode */
2157 for (i = 0; i < ATA_MAX_DEVICES; i++) {
2158 dev = &ap->device[i];
2160 if (!ata_dev_enabled(dev))
2163 rc = ata_dev_set_mode(dev);
2168 /* Record simplex status. If we selected DMA then the other
2169 * host channels are not permitted to do so.
2171 if (used_dma && (ap->host_set->flags & ATA_HOST_SIMPLEX))
2172 ap->host_set->simplex_claimed = 1;
2174 /* step5: chip specific finalisation */
2175 if (ap->ops->post_set_mode)
2176 ap->ops->post_set_mode(ap);
2180 *r_failed_dev = dev;
2185 * ata_tf_to_host - issue ATA taskfile to host controller
2186 * @ap: port to which command is being issued
2187 * @tf: ATA taskfile register set
2189 * Issues ATA taskfile register set to ATA host controller,
2190 * with proper synchronization with interrupt handler and
2194 * spin_lock_irqsave(host_set lock)
2197 static inline void ata_tf_to_host(struct ata_port *ap,
2198 const struct ata_taskfile *tf)
2200 ap->ops->tf_load(ap, tf);
2201 ap->ops->exec_command(ap, tf);
2205 * ata_busy_sleep - sleep until BSY clears, or timeout
2206 * @ap: port containing status register to be polled
2207 * @tmout_pat: impatience timeout
2208 * @tmout: overall timeout
2210 * Sleep until ATA Status register bit BSY clears,
2211 * or a timeout occurs.
2216 unsigned int ata_busy_sleep (struct ata_port *ap,
2217 unsigned long tmout_pat, unsigned long tmout)
2219 unsigned long timer_start, timeout;
2222 status = ata_busy_wait(ap, ATA_BUSY, 300);
2223 timer_start = jiffies;
2224 timeout = timer_start + tmout_pat;
2225 while ((status & ATA_BUSY) && (time_before(jiffies, timeout))) {
2227 status = ata_busy_wait(ap, ATA_BUSY, 3);
2230 if (status & ATA_BUSY)
2231 ata_port_printk(ap, KERN_WARNING,
2232 "port is slow to respond, please be patient\n");
2234 timeout = timer_start + tmout;
2235 while ((status & ATA_BUSY) && (time_before(jiffies, timeout))) {
2237 status = ata_chk_status(ap);
2240 if (status & ATA_BUSY) {
2241 ata_port_printk(ap, KERN_ERR, "port failed to respond "
2242 "(%lu secs)\n", tmout / HZ);
2249 static void ata_bus_post_reset(struct ata_port *ap, unsigned int devmask)
2251 struct ata_ioports *ioaddr = &ap->ioaddr;
2252 unsigned int dev0 = devmask & (1 << 0);
2253 unsigned int dev1 = devmask & (1 << 1);
2254 unsigned long timeout;
2256 /* if device 0 was found in ata_devchk, wait for its
2260 ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT);
2262 /* if device 1 was found in ata_devchk, wait for
2263 * register access, then wait for BSY to clear
2265 timeout = jiffies + ATA_TMOUT_BOOT;
2269 ap->ops->dev_select(ap, 1);
2270 if (ap->flags & ATA_FLAG_MMIO) {
2271 nsect = readb((void __iomem *) ioaddr->nsect_addr);
2272 lbal = readb((void __iomem *) ioaddr->lbal_addr);
2274 nsect = inb(ioaddr->nsect_addr);
2275 lbal = inb(ioaddr->lbal_addr);
2277 if ((nsect == 1) && (lbal == 1))
2279 if (time_after(jiffies, timeout)) {
2283 msleep(50); /* give drive a breather */
2286 ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT);
2288 /* is all this really necessary? */
2289 ap->ops->dev_select(ap, 0);
2291 ap->ops->dev_select(ap, 1);
2293 ap->ops->dev_select(ap, 0);
2296 static unsigned int ata_bus_softreset(struct ata_port *ap,
2297 unsigned int devmask)
2299 struct ata_ioports *ioaddr = &ap->ioaddr;
2301 DPRINTK("ata%u: bus reset via SRST\n", ap->id);
2303 /* software reset. causes dev0 to be selected */
2304 if (ap->flags & ATA_FLAG_MMIO) {
2305 writeb(ap->ctl, (void __iomem *) ioaddr->ctl_addr);
2306 udelay(20); /* FIXME: flush */
2307 writeb(ap->ctl | ATA_SRST, (void __iomem *) ioaddr->ctl_addr);
2308 udelay(20); /* FIXME: flush */
2309 writeb(ap->ctl, (void __iomem *) ioaddr->ctl_addr);
2311 outb(ap->ctl, ioaddr->ctl_addr);
2313 outb(ap->ctl | ATA_SRST, ioaddr->ctl_addr);
2315 outb(ap->ctl, ioaddr->ctl_addr);
2318 /* spec mandates ">= 2ms" before checking status.
2319 * We wait 150ms, because that was the magic delay used for
2320 * ATAPI devices in Hale Landis's ATADRVR, for the period of time
2321 * between when the ATA command register is written, and then
2322 * status is checked. Because waiting for "a while" before
2323 * checking status is fine, post SRST, we perform this magic
2324 * delay here as well.
2326 * Old drivers/ide uses the 2mS rule and then waits for ready
2330 /* Before we perform post reset processing we want to see if
2331 * the bus shows 0xFF because the odd clown forgets the D7
2332 * pulldown resistor.
2334 if (ata_check_status(ap) == 0xFF) {
2335 ata_port_printk(ap, KERN_ERR, "SRST failed (status 0xFF)\n");
2336 return AC_ERR_OTHER;
2339 ata_bus_post_reset(ap, devmask);
2345 * ata_bus_reset - reset host port and associated ATA channel
2346 * @ap: port to reset
2348 * This is typically the first time we actually start issuing
2349 * commands to the ATA channel. We wait for BSY to clear, then
2350 * issue EXECUTE DEVICE DIAGNOSTIC command, polling for its
2351 * result. Determine what devices, if any, are on the channel
2352 * by looking at the device 0/1 error register. Look at the signature
2353 * stored in each device's taskfile registers, to determine if
2354 * the device is ATA or ATAPI.
2357 * PCI/etc. bus probe sem.
2358 * Obtains host_set lock.
2361 * Sets ATA_FLAG_DISABLED if bus reset fails.
2364 void ata_bus_reset(struct ata_port *ap)
2366 struct ata_ioports *ioaddr = &ap->ioaddr;
2367 unsigned int slave_possible = ap->flags & ATA_FLAG_SLAVE_POSS;
2369 unsigned int dev0, dev1 = 0, devmask = 0;
2371 DPRINTK("ENTER, host %u, port %u\n", ap->id, ap->port_no);
2373 /* determine if device 0/1 are present */
2374 if (ap->flags & ATA_FLAG_SATA_RESET)
2377 dev0 = ata_devchk(ap, 0);
2379 dev1 = ata_devchk(ap, 1);
2383 devmask |= (1 << 0);
2385 devmask |= (1 << 1);
2387 /* select device 0 again */
2388 ap->ops->dev_select(ap, 0);
2390 /* issue bus reset */
2391 if (ap->flags & ATA_FLAG_SRST)
2392 if (ata_bus_softreset(ap, devmask))
2396 * determine by signature whether we have ATA or ATAPI devices
2398 ap->device[0].class = ata_dev_try_classify(ap, 0, &err);
2399 if ((slave_possible) && (err != 0x81))
2400 ap->device[1].class = ata_dev_try_classify(ap, 1, &err);
2402 /* re-enable interrupts */
2403 if (ap->ioaddr.ctl_addr) /* FIXME: hack. create a hook instead */
2406 /* is double-select really necessary? */
2407 if (ap->device[1].class != ATA_DEV_NONE)
2408 ap->ops->dev_select(ap, 1);
2409 if (ap->device[0].class != ATA_DEV_NONE)
2410 ap->ops->dev_select(ap, 0);
2412 /* if no devices were detected, disable this port */
2413 if ((ap->device[0].class == ATA_DEV_NONE) &&
2414 (ap->device[1].class == ATA_DEV_NONE))
2417 if (ap->flags & (ATA_FLAG_SATA_RESET | ATA_FLAG_SRST)) {
2418 /* set up device control for ATA_FLAG_SATA_RESET */
2419 if (ap->flags & ATA_FLAG_MMIO)
2420 writeb(ap->ctl, (void __iomem *) ioaddr->ctl_addr);
2422 outb(ap->ctl, ioaddr->ctl_addr);
2429 ata_port_printk(ap, KERN_ERR, "disabling port\n");
2430 ap->ops->port_disable(ap);
2436 * sata_phy_debounce - debounce SATA phy status
2437 * @ap: ATA port to debounce SATA phy status for
2438 * @params: timing parameters { interval, duratinon, timeout } in msec
2440 * Make sure SStatus of @ap reaches stable state, determined by
2441 * holding the same value where DET is not 1 for @duration polled
2442 * every @interval, before @timeout. Timeout constraints the
2443 * beginning of the stable state. Because, after hot unplugging,
2444 * DET gets stuck at 1 on some controllers, this functions waits
2445 * until timeout then returns 0 if DET is stable at 1.
2448 * Kernel thread context (may sleep)
2451 * 0 on success, -errno on failure.
2453 int sata_phy_debounce(struct ata_port *ap, const unsigned long *params)
2455 unsigned long interval_msec = params[0];
2456 unsigned long duration = params[1] * HZ / 1000;
2457 unsigned long timeout = jiffies + params[2] * HZ / 1000;
2458 unsigned long last_jiffies;
2462 if ((rc = sata_scr_read(ap, SCR_STATUS, &cur)))
2467 last_jiffies = jiffies;
2470 msleep(interval_msec);
2471 if ((rc = sata_scr_read(ap, SCR_STATUS, &cur)))
2477 if (cur == 1 && time_before(jiffies, timeout))
2479 if (time_after(jiffies, last_jiffies + duration))
2484 /* unstable, start over */
2486 last_jiffies = jiffies;
2489 if (time_after(jiffies, timeout))
2495 * sata_phy_resume - resume SATA phy
2496 * @ap: ATA port to resume SATA phy for
2497 * @params: timing parameters { interval, duratinon, timeout } in msec
2499 * Resume SATA phy of @ap and debounce it.
2502 * Kernel thread context (may sleep)
2505 * 0 on success, -errno on failure.
2507 int sata_phy_resume(struct ata_port *ap, const unsigned long *params)
2512 if ((rc = sata_scr_read(ap, SCR_CONTROL, &scontrol)))
2515 scontrol = (scontrol & 0x0f0) | 0x300;
2517 if ((rc = sata_scr_write(ap, SCR_CONTROL, scontrol)))
2520 /* Some PHYs react badly if SStatus is pounded immediately
2521 * after resuming. Delay 200ms before debouncing.
2525 return sata_phy_debounce(ap, params);
2528 static void ata_wait_spinup(struct ata_port *ap)
2530 struct ata_eh_context *ehc = &ap->eh_context;
2531 unsigned long end, secs;
2534 /* first, debounce phy if SATA */
2535 if (ap->cbl == ATA_CBL_SATA) {
2536 rc = sata_phy_debounce(ap, sata_deb_timing_eh);
2538 /* if debounced successfully and offline, no need to wait */
2539 if ((rc == 0 || rc == -EOPNOTSUPP) && ata_port_offline(ap))
2543 /* okay, let's give the drive time to spin up */
2544 end = ehc->i.hotplug_timestamp + ATA_SPINUP_WAIT * HZ / 1000;
2545 secs = ((end - jiffies) + HZ - 1) / HZ;
2547 if (time_after(jiffies, end))
2551 ata_port_printk(ap, KERN_INFO, "waiting for device to spin up "
2552 "(%lu secs)\n", secs);
2554 schedule_timeout_uninterruptible(end - jiffies);
2558 * ata_std_prereset - prepare for reset
2559 * @ap: ATA port to be reset
2561 * @ap is about to be reset. Initialize it.
2564 * Kernel thread context (may sleep)
2567 * 0 on success, -errno otherwise.
2569 int ata_std_prereset(struct ata_port *ap)
2571 struct ata_eh_context *ehc = &ap->eh_context;
2572 const unsigned long *timing;
2576 if (ehc->i.flags & ATA_EHI_HOTPLUGGED) {
2577 if (ap->flags & ATA_FLAG_HRST_TO_RESUME)
2578 ehc->i.action |= ATA_EH_HARDRESET;
2579 if (ap->flags & ATA_FLAG_SKIP_D2H_BSY)
2580 ata_wait_spinup(ap);
2583 /* if we're about to do hardreset, nothing more to do */
2584 if (ehc->i.action & ATA_EH_HARDRESET)
2587 /* if SATA, resume phy */
2588 if (ap->cbl == ATA_CBL_SATA) {
2589 if (ap->flags & ATA_FLAG_LOADING)
2590 timing = sata_deb_timing_boot;
2592 timing = sata_deb_timing_eh;
2594 rc = sata_phy_resume(ap, timing);
2595 if (rc && rc != -EOPNOTSUPP) {
2596 /* phy resume failed */
2597 ata_port_printk(ap, KERN_WARNING, "failed to resume "
2598 "link for reset (errno=%d)\n", rc);
2603 /* Wait for !BSY if the controller can wait for the first D2H
2604 * Reg FIS and we don't know that no device is attached.
2606 if (!(ap->flags & ATA_FLAG_SKIP_D2H_BSY) && !ata_port_offline(ap))
2607 ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT);
2613 * ata_std_probeinit - initialize probing
2614 * @ap: port to be probed
2616 * @ap is about to be probed. Initialize it. This function is
2617 * to be used as standard callback for ata_drive_probe_reset().
2619 * NOTE!!! Do not use this function as probeinit if a low level
2620 * driver implements only hardreset. Just pass NULL as probeinit
2621 * in that case. Using this function is probably okay but doing
2622 * so makes reset sequence different from the original
2623 * ->phy_reset implementation and Jeff nervous. :-P
2625 void ata_std_probeinit(struct ata_port *ap)
2627 static const unsigned long deb_timing[] = { 5, 100, 5000 };
2630 sata_phy_resume(ap, deb_timing);
2632 /* wait for device */
2633 if (ata_port_online(ap))
2634 ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT);
2638 * ata_std_softreset - reset host port via ATA SRST
2639 * @ap: port to reset
2640 * @classes: resulting classes of attached devices
2642 * Reset host port using ATA SRST. This function is to be used
2643 * as standard callback for ata_drive_*_reset() functions.
2646 * Kernel thread context (may sleep)
2649 * 0 on success, -errno otherwise.
2651 int ata_std_softreset(struct ata_port *ap, unsigned int *classes)
2653 unsigned int slave_possible = ap->flags & ATA_FLAG_SLAVE_POSS;
2654 unsigned int devmask = 0, err_mask;
2659 if (ata_port_offline(ap)) {
2660 classes[0] = ATA_DEV_NONE;
2664 /* determine if device 0/1 are present */
2665 if (ata_devchk(ap, 0))
2666 devmask |= (1 << 0);
2667 if (slave_possible && ata_devchk(ap, 1))
2668 devmask |= (1 << 1);
2670 /* select device 0 again */
2671 ap->ops->dev_select(ap, 0);
2673 /* issue bus reset */
2674 DPRINTK("about to softreset, devmask=%x\n", devmask);
2675 err_mask = ata_bus_softreset(ap, devmask);
2677 ata_port_printk(ap, KERN_ERR, "SRST failed (err_mask=0x%x)\n",
2682 /* determine by signature whether we have ATA or ATAPI devices */
2683 classes[0] = ata_dev_try_classify(ap, 0, &err);
2684 if (slave_possible && err != 0x81)
2685 classes[1] = ata_dev_try_classify(ap, 1, &err);
2688 DPRINTK("EXIT, classes[0]=%u [1]=%u\n", classes[0], classes[1]);
2693 * sata_std_hardreset - reset host port via SATA phy reset
2694 * @ap: port to reset
2695 * @class: resulting class of attached device
2697 * SATA phy-reset host port using DET bits of SControl register.
2698 * This function is to be used as standard callback for
2699 * ata_drive_*_reset().
2702 * Kernel thread context (may sleep)
2705 * 0 on success, -errno otherwise.
2707 int sata_std_hardreset(struct ata_port *ap, unsigned int *class)
2714 if (sata_set_spd_needed(ap)) {
2715 /* SATA spec says nothing about how to reconfigure
2716 * spd. To be on the safe side, turn off phy during
2717 * reconfiguration. This works for at least ICH7 AHCI
2720 if ((rc = sata_scr_read(ap, SCR_CONTROL, &scontrol)))
2723 scontrol = (scontrol & 0x0f0) | 0x302;
2725 if ((rc = sata_scr_write(ap, SCR_CONTROL, scontrol)))
2731 /* issue phy wake/reset */
2732 if ((rc = sata_scr_read(ap, SCR_CONTROL, &scontrol)))
2735 scontrol = (scontrol & 0x0f0) | 0x301;
2737 if ((rc = sata_scr_write_flush(ap, SCR_CONTROL, scontrol)))
2740 /* Couldn't find anything in SATA I/II specs, but AHCI-1.1
2741 * 10.4.2 says at least 1 ms.
2745 /* bring phy back */
2746 sata_phy_resume(ap, sata_deb_timing_eh);
2748 /* TODO: phy layer with polling, timeouts, etc. */
2749 if (ata_port_offline(ap)) {
2750 *class = ATA_DEV_NONE;
2751 DPRINTK("EXIT, link offline\n");
2755 if (ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT)) {
2756 ata_port_printk(ap, KERN_ERR,
2757 "COMRESET failed (device not ready)\n");
2761 ap->ops->dev_select(ap, 0); /* probably unnecessary */
2763 *class = ata_dev_try_classify(ap, 0, NULL);
2765 DPRINTK("EXIT, class=%u\n", *class);
2770 * ata_std_postreset - standard postreset callback
2771 * @ap: the target ata_port
2772 * @classes: classes of attached devices
2774 * This function is invoked after a successful reset. Note that
2775 * the device might have been reset more than once using
2776 * different reset methods before postreset is invoked.
2778 * This function is to be used as standard callback for
2779 * ata_drive_*_reset().
2782 * Kernel thread context (may sleep)
2784 void ata_std_postreset(struct ata_port *ap, unsigned int *classes)
2790 /* print link status */
2791 sata_print_link_status(ap);
2794 if (sata_scr_read(ap, SCR_ERROR, &serror) == 0)
2795 sata_scr_write(ap, SCR_ERROR, serror);
2797 /* re-enable interrupts */
2798 if (!ap->ops->error_handler) {
2799 /* FIXME: hack. create a hook instead */
2800 if (ap->ioaddr.ctl_addr)
2804 /* is double-select really necessary? */
2805 if (classes[0] != ATA_DEV_NONE)
2806 ap->ops->dev_select(ap, 1);
2807 if (classes[1] != ATA_DEV_NONE)
2808 ap->ops->dev_select(ap, 0);
2810 /* bail out if no device is present */
2811 if (classes[0] == ATA_DEV_NONE && classes[1] == ATA_DEV_NONE) {
2812 DPRINTK("EXIT, no device\n");
2816 /* set up device control */
2817 if (ap->ioaddr.ctl_addr) {
2818 if (ap->flags & ATA_FLAG_MMIO)
2819 writeb(ap->ctl, (void __iomem *) ap->ioaddr.ctl_addr);
2821 outb(ap->ctl, ap->ioaddr.ctl_addr);
2828 * ata_std_probe_reset - standard probe reset method
2829 * @ap: prot to perform probe-reset
2830 * @classes: resulting classes of attached devices
2832 * The stock off-the-shelf ->probe_reset method.
2835 * Kernel thread context (may sleep)
2838 * 0 on success, -errno otherwise.
2840 int ata_std_probe_reset(struct ata_port *ap, unsigned int *classes)
2842 ata_reset_fn_t hardreset;
2845 if (sata_scr_valid(ap))
2846 hardreset = sata_std_hardreset;
2848 return ata_drive_probe_reset(ap, ata_std_probeinit,
2849 ata_std_softreset, hardreset,
2850 ata_std_postreset, classes);
2853 int ata_do_reset(struct ata_port *ap, ata_reset_fn_t reset,
2854 unsigned int *classes)
2858 for (i = 0; i < ATA_MAX_DEVICES; i++)
2859 classes[i] = ATA_DEV_UNKNOWN;
2861 rc = reset(ap, classes);
2865 /* If any class isn't ATA_DEV_UNKNOWN, consider classification
2866 * is complete and convert all ATA_DEV_UNKNOWN to
2869 for (i = 0; i < ATA_MAX_DEVICES; i++)
2870 if (classes[i] != ATA_DEV_UNKNOWN)
2873 if (i < ATA_MAX_DEVICES)
2874 for (i = 0; i < ATA_MAX_DEVICES; i++)
2875 if (classes[i] == ATA_DEV_UNKNOWN)
2876 classes[i] = ATA_DEV_NONE;
2882 * ata_drive_probe_reset - Perform probe reset with given methods
2883 * @ap: port to reset
2884 * @probeinit: probeinit method (can be NULL)
2885 * @softreset: softreset method (can be NULL)
2886 * @hardreset: hardreset method (can be NULL)
2887 * @postreset: postreset method (can be NULL)
2888 * @classes: resulting classes of attached devices
2890 * Reset the specified port and classify attached devices using
2891 * given methods. This function prefers softreset but tries all
2892 * possible reset sequences to reset and classify devices. This
2893 * function is intended to be used for constructing ->probe_reset
2894 * callback by low level drivers.
2896 * Reset methods should follow the following rules.
2898 * - Return 0 on sucess, -errno on failure.
2899 * - If classification is supported, fill classes[] with
2900 * recognized class codes.
2901 * - If classification is not supported, leave classes[] alone.
2904 * Kernel thread context (may sleep)
2907 * 0 on success, -EINVAL if no reset method is avaliable, -ENODEV
2908 * if classification fails, and any error code from reset
2911 int ata_drive_probe_reset(struct ata_port *ap, ata_probeinit_fn_t probeinit,
2912 ata_reset_fn_t softreset, ata_reset_fn_t hardreset,
2913 ata_postreset_fn_t postreset, unsigned int *classes)
2917 ata_eh_freeze_port(ap);
2922 if (softreset && !sata_set_spd_needed(ap)) {
2923 rc = ata_do_reset(ap, softreset, classes);
2924 if (rc == 0 && classes[0] != ATA_DEV_UNKNOWN)
2926 ata_port_printk(ap, KERN_INFO, "softreset failed, "
2927 "will try hardreset in 5 secs\n");
2935 rc = ata_do_reset(ap, hardreset, classes);
2937 if (classes[0] != ATA_DEV_UNKNOWN)
2942 if (sata_down_spd_limit(ap))
2945 ata_port_printk(ap, KERN_INFO, "hardreset failed, "
2946 "will retry in 5 secs\n");
2951 ata_port_printk(ap, KERN_INFO,
2952 "hardreset succeeded without classification, "
2953 "will retry softreset in 5 secs\n");
2956 rc = ata_do_reset(ap, softreset, classes);
2962 postreset(ap, classes);
2964 ata_eh_thaw_port(ap);
2966 if (classes[0] == ATA_DEV_UNKNOWN)
2973 * ata_dev_same_device - Determine whether new ID matches configured device
2974 * @dev: device to compare against
2975 * @new_class: class of the new device
2976 * @new_id: IDENTIFY page of the new device
2978 * Compare @new_class and @new_id against @dev and determine
2979 * whether @dev is the device indicated by @new_class and
2986 * 1 if @dev matches @new_class and @new_id, 0 otherwise.
2988 static int ata_dev_same_device(struct ata_device *dev, unsigned int new_class,
2991 const u16 *old_id = dev->id;
2992 unsigned char model[2][41], serial[2][21];
2995 if (dev->class != new_class) {
2996 ata_dev_printk(dev, KERN_INFO, "class mismatch %d != %d\n",
2997 dev->class, new_class);
3001 ata_id_c_string(old_id, model[0], ATA_ID_PROD_OFS, sizeof(model[0]));
3002 ata_id_c_string(new_id, model[1], ATA_ID_PROD_OFS, sizeof(model[1]));
3003 ata_id_c_string(old_id, serial[0], ATA_ID_SERNO_OFS, sizeof(serial[0]));
3004 ata_id_c_string(new_id, serial[1], ATA_ID_SERNO_OFS, sizeof(serial[1]));
3005 new_n_sectors = ata_id_n_sectors(new_id);
3007 if (strcmp(model[0], model[1])) {
3008 ata_dev_printk(dev, KERN_INFO, "model number mismatch "
3009 "'%s' != '%s'\n", model[0], model[1]);
3013 if (strcmp(serial[0], serial[1])) {
3014 ata_dev_printk(dev, KERN_INFO, "serial number mismatch "
3015 "'%s' != '%s'\n", serial[0], serial[1]);
3019 if (dev->class == ATA_DEV_ATA && dev->n_sectors != new_n_sectors) {
3020 ata_dev_printk(dev, KERN_INFO, "n_sectors mismatch "
3022 (unsigned long long)dev->n_sectors,
3023 (unsigned long long)new_n_sectors);
3031 * ata_dev_revalidate - Revalidate ATA device
3032 * @dev: device to revalidate
3033 * @post_reset: is this revalidation after reset?
3035 * Re-read IDENTIFY page and make sure @dev is still attached to
3039 * Kernel thread context (may sleep)
3042 * 0 on success, negative errno otherwise
3044 int ata_dev_revalidate(struct ata_device *dev, int post_reset)
3046 unsigned int class = dev->class;
3047 u16 *id = (void *)dev->ap->sector_buf;
3050 if (!ata_dev_enabled(dev)) {
3056 rc = ata_dev_read_id(dev, &class, post_reset, id);
3060 /* is the device still there? */
3061 if (!ata_dev_same_device(dev, class, id)) {
3066 memcpy(dev->id, id, sizeof(id[0]) * ATA_ID_WORDS);
3068 /* configure device according to the new ID */
3069 rc = ata_dev_configure(dev, 0);
3074 ata_dev_printk(dev, KERN_ERR, "revalidation failed (errno=%d)\n", rc);
3078 static const char * const ata_dma_blacklist [] = {
3079 "WDC AC11000H", NULL,
3080 "WDC AC22100H", NULL,
3081 "WDC AC32500H", NULL,
3082 "WDC AC33100H", NULL,
3083 "WDC AC31600H", NULL,
3084 "WDC AC32100H", "24.09P07",
3085 "WDC AC23200L", "21.10N21",
3086 "Compaq CRD-8241B", NULL,
3091 "SanDisk SDP3B", NULL,
3092 "SanDisk SDP3B-64", NULL,
3093 "SANYO CD-ROM CRD", NULL,
3094 "HITACHI CDR-8", NULL,
3095 "HITACHI CDR-8335", NULL,
3096 "HITACHI CDR-8435", NULL,
3097 "Toshiba CD-ROM XM-6202B", NULL,
3098 "TOSHIBA CD-ROM XM-1702BC", NULL,
3100 "E-IDE CD-ROM CR-840", NULL,
3101 "CD-ROM Drive/F5A", NULL,
3102 "WPI CDD-820", NULL,
3103 "SAMSUNG CD-ROM SC-148C", NULL,
3104 "SAMSUNG CD-ROM SC", NULL,
3105 "SanDisk SDP3B-64", NULL,
3106 "ATAPI CD-ROM DRIVE 40X MAXIMUM",NULL,
3107 "_NEC DV5800A", NULL,
3108 "SAMSUNG CD-ROM SN-124", "N001"
3111 static int ata_strim(char *s, size_t len)
3113 len = strnlen(s, len);
3115 /* ATAPI specifies that empty space is blank-filled; remove blanks */
3116 while ((len > 0) && (s[len - 1] == ' ')) {
3123 static int ata_dma_blacklisted(const struct ata_device *dev)
3125 unsigned char model_num[40];
3126 unsigned char model_rev[16];
3127 unsigned int nlen, rlen;
3130 ata_id_string(dev->id, model_num, ATA_ID_PROD_OFS,
3132 ata_id_string(dev->id, model_rev, ATA_ID_FW_REV_OFS,
3134 nlen = ata_strim(model_num, sizeof(model_num));
3135 rlen = ata_strim(model_rev, sizeof(model_rev));
3137 for (i = 0; i < ARRAY_SIZE(ata_dma_blacklist); i += 2) {
3138 if (!strncmp(ata_dma_blacklist[i], model_num, nlen)) {
3139 if (ata_dma_blacklist[i+1] == NULL)
3141 if (!strncmp(ata_dma_blacklist[i], model_rev, rlen))
3149 * ata_dev_xfermask - Compute supported xfermask of the given device
3150 * @dev: Device to compute xfermask for
3152 * Compute supported xfermask of @dev and store it in
3153 * dev->*_mask. This function is responsible for applying all
3154 * known limits including host controller limits, device
3157 * FIXME: The current implementation limits all transfer modes to
3158 * the fastest of the lowested device on the port. This is not
3159 * required on most controllers.
3164 static void ata_dev_xfermask(struct ata_device *dev)
3166 struct ata_port *ap = dev->ap;
3167 struct ata_host_set *hs = ap->host_set;
3168 unsigned long xfer_mask;
3171 xfer_mask = ata_pack_xfermask(ap->pio_mask,
3172 ap->mwdma_mask, ap->udma_mask);
3174 /* Apply cable rule here. Don't apply it early because when
3175 * we handle hot plug the cable type can itself change.
3177 if (ap->cbl == ATA_CBL_PATA40)
3178 xfer_mask &= ~(0xF8 << ATA_SHIFT_UDMA);
3180 /* FIXME: Use port-wide xfermask for now */
3181 for (i = 0; i < ATA_MAX_DEVICES; i++) {
3182 struct ata_device *d = &ap->device[i];
3184 if (ata_dev_absent(d))
3187 if (ata_dev_disabled(d)) {
3188 /* to avoid violating device selection timing */
3189 xfer_mask &= ata_pack_xfermask(d->pio_mask,
3190 UINT_MAX, UINT_MAX);
3194 xfer_mask &= ata_pack_xfermask(d->pio_mask,
3195 d->mwdma_mask, d->udma_mask);
3196 xfer_mask &= ata_id_xfermask(d->id);
3197 if (ata_dma_blacklisted(d))
3198 xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA);
3201 if (ata_dma_blacklisted(dev))
3202 ata_dev_printk(dev, KERN_WARNING,
3203 "device is on DMA blacklist, disabling DMA\n");
3205 if (hs->flags & ATA_HOST_SIMPLEX) {
3206 if (hs->simplex_claimed)
3207 xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA);
3210 if (ap->ops->mode_filter)
3211 xfer_mask = ap->ops->mode_filter(ap, dev, xfer_mask);
3213 ata_unpack_xfermask(xfer_mask, &dev->pio_mask,
3214 &dev->mwdma_mask, &dev->udma_mask);
3218 * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command
3219 * @dev: Device to which command will be sent
3221 * Issue SET FEATURES - XFER MODE command to device @dev
3225 * PCI/etc. bus probe sem.
3228 * 0 on success, AC_ERR_* mask otherwise.
3231 static unsigned int ata_dev_set_xfermode(struct ata_device *dev)
3233 struct ata_taskfile tf;
3234 unsigned int err_mask;
3236 /* set up set-features taskfile */
3237 DPRINTK("set features - xfer mode\n");
3239 ata_tf_init(dev, &tf);
3240 tf.command = ATA_CMD_SET_FEATURES;
3241 tf.feature = SETFEATURES_XFER;
3242 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
3243 tf.protocol = ATA_PROT_NODATA;
3244 tf.nsect = dev->xfer_mode;
3246 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0);
3248 DPRINTK("EXIT, err_mask=%x\n", err_mask);
3253 * ata_dev_init_params - Issue INIT DEV PARAMS command
3254 * @dev: Device to which command will be sent
3255 * @heads: Number of heads (taskfile parameter)
3256 * @sectors: Number of sectors (taskfile parameter)
3259 * Kernel thread context (may sleep)
3262 * 0 on success, AC_ERR_* mask otherwise.
3264 static unsigned int ata_dev_init_params(struct ata_device *dev,
3265 u16 heads, u16 sectors)
3267 struct ata_taskfile tf;
3268 unsigned int err_mask;
3270 /* Number of sectors per track 1-255. Number of heads 1-16 */
3271 if (sectors < 1 || sectors > 255 || heads < 1 || heads > 16)
3272 return AC_ERR_INVALID;
3274 /* set up init dev params taskfile */
3275 DPRINTK("init dev params \n");
3277 ata_tf_init(dev, &tf);
3278 tf.command = ATA_CMD_INIT_DEV_PARAMS;
3279 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
3280 tf.protocol = ATA_PROT_NODATA;
3282 tf.device |= (heads - 1) & 0x0f; /* max head = num. of heads - 1 */
3284 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0);
3286 DPRINTK("EXIT, err_mask=%x\n", err_mask);
3291 * ata_sg_clean - Unmap DMA memory associated with command
3292 * @qc: Command containing DMA memory to be released
3294 * Unmap all mapped DMA memory associated with this command.
3297 * spin_lock_irqsave(host_set lock)
3300 static void ata_sg_clean(struct ata_queued_cmd *qc)
3302 struct ata_port *ap = qc->ap;
3303 struct scatterlist *sg = qc->__sg;
3304 int dir = qc->dma_dir;
3305 void *pad_buf = NULL;
3307 WARN_ON(!(qc->flags & ATA_QCFLAG_DMAMAP));
3308 WARN_ON(sg == NULL);
3310 if (qc->flags & ATA_QCFLAG_SINGLE)
3311 WARN_ON(qc->n_elem > 1);
3313 VPRINTK("unmapping %u sg elements\n", qc->n_elem);
3315 /* if we padded the buffer out to 32-bit bound, and data
3316 * xfer direction is from-device, we must copy from the
3317 * pad buffer back into the supplied buffer
3319 if (qc->pad_len && !(qc->tf.flags & ATA_TFLAG_WRITE))
3320 pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ);
3322 if (qc->flags & ATA_QCFLAG_SG) {
3324 dma_unmap_sg(ap->dev, sg, qc->n_elem, dir);
3325 /* restore last sg */
3326 sg[qc->orig_n_elem - 1].length += qc->pad_len;
3328 struct scatterlist *psg = &qc->pad_sgent;
3329 void *addr = kmap_atomic(psg->page, KM_IRQ0);
3330 memcpy(addr + psg->offset, pad_buf, qc->pad_len);
3331 kunmap_atomic(addr, KM_IRQ0);
3335 dma_unmap_single(ap->dev,
3336 sg_dma_address(&sg[0]), sg_dma_len(&sg[0]),
3339 sg->length += qc->pad_len;
3341 memcpy(qc->buf_virt + sg->length - qc->pad_len,
3342 pad_buf, qc->pad_len);
3345 qc->flags &= ~ATA_QCFLAG_DMAMAP;
3350 * ata_fill_sg - Fill PCI IDE PRD table
3351 * @qc: Metadata associated with taskfile to be transferred
3353 * Fill PCI IDE PRD (scatter-gather) table with segments
3354 * associated with the current disk command.
3357 * spin_lock_irqsave(host_set lock)
3360 static void ata_fill_sg(struct ata_queued_cmd *qc)
3362 struct ata_port *ap = qc->ap;
3363 struct scatterlist *sg;
3366 WARN_ON(qc->__sg == NULL);
3367 WARN_ON(qc->n_elem == 0 && qc->pad_len == 0);
3370 ata_for_each_sg(sg, qc) {
3374 /* determine if physical DMA addr spans 64K boundary.
3375 * Note h/w doesn't support 64-bit, so we unconditionally
3376 * truncate dma_addr_t to u32.
3378 addr = (u32) sg_dma_address(sg);
3379 sg_len = sg_dma_len(sg);
3382 offset = addr & 0xffff;
3384 if ((offset + sg_len) > 0x10000)
3385 len = 0x10000 - offset;
3387 ap->prd[idx].addr = cpu_to_le32(addr);
3388 ap->prd[idx].flags_len = cpu_to_le32(len & 0xffff);
3389 VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", idx, addr, len);
3398 ap->prd[idx - 1].flags_len |= cpu_to_le32(ATA_PRD_EOT);
3401 * ata_check_atapi_dma - Check whether ATAPI DMA can be supported
3402 * @qc: Metadata associated with taskfile to check
3404 * Allow low-level driver to filter ATA PACKET commands, returning
3405 * a status indicating whether or not it is OK to use DMA for the
3406 * supplied PACKET command.
3409 * spin_lock_irqsave(host_set lock)
3411 * RETURNS: 0 when ATAPI DMA can be used
3414 int ata_check_atapi_dma(struct ata_queued_cmd *qc)
3416 struct ata_port *ap = qc->ap;
3417 int rc = 0; /* Assume ATAPI DMA is OK by default */
3419 if (ap->ops->check_atapi_dma)
3420 rc = ap->ops->check_atapi_dma(qc);
3422 /* We don't support polling DMA.
3423 * Use PIO if the LLDD handles only interrupts in
3424 * the HSM_ST_LAST state and the ATAPI device
3425 * generates CDB interrupts.
3427 if ((ap->flags & ATA_FLAG_PIO_POLLING) &&
3428 (qc->dev->flags & ATA_DFLAG_CDB_INTR))
3434 * ata_qc_prep - Prepare taskfile for submission
3435 * @qc: Metadata associated with taskfile to be prepared
3437 * Prepare ATA taskfile for submission.
3440 * spin_lock_irqsave(host_set lock)
3442 void ata_qc_prep(struct ata_queued_cmd *qc)
3444 if (!(qc->flags & ATA_QCFLAG_DMAMAP))
3450 void ata_noop_qc_prep(struct ata_queued_cmd *qc) { }
3453 * ata_sg_init_one - Associate command with memory buffer
3454 * @qc: Command to be associated
3455 * @buf: Memory buffer
3456 * @buflen: Length of memory buffer, in bytes.
3458 * Initialize the data-related elements of queued_cmd @qc
3459 * to point to a single memory buffer, @buf of byte length @buflen.
3462 * spin_lock_irqsave(host_set lock)
3465 void ata_sg_init_one(struct ata_queued_cmd *qc, void *buf, unsigned int buflen)
3467 struct scatterlist *sg;
3469 qc->flags |= ATA_QCFLAG_SINGLE;
3471 memset(&qc->sgent, 0, sizeof(qc->sgent));
3472 qc->__sg = &qc->sgent;
3474 qc->orig_n_elem = 1;
3478 sg_init_one(sg, buf, buflen);
3482 * ata_sg_init - Associate command with scatter-gather table.
3483 * @qc: Command to be associated
3484 * @sg: Scatter-gather table.
3485 * @n_elem: Number of elements in s/g table.
3487 * Initialize the data-related elements of queued_cmd @qc
3488 * to point to a scatter-gather table @sg, containing @n_elem
3492 * spin_lock_irqsave(host_set lock)
3495 void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
3496 unsigned int n_elem)
3498 qc->flags |= ATA_QCFLAG_SG;
3500 qc->n_elem = n_elem;
3501 qc->orig_n_elem = n_elem;
3505 * ata_sg_setup_one - DMA-map the memory buffer associated with a command.
3506 * @qc: Command with memory buffer to be mapped.
3508 * DMA-map the memory buffer associated with queued_cmd @qc.
3511 * spin_lock_irqsave(host_set lock)
3514 * Zero on success, negative on error.
3517 static int ata_sg_setup_one(struct ata_queued_cmd *qc)
3519 struct ata_port *ap = qc->ap;
3520 int dir = qc->dma_dir;
3521 struct scatterlist *sg = qc->__sg;
3522 dma_addr_t dma_address;
3525 /* we must lengthen transfers to end on a 32-bit boundary */
3526 qc->pad_len = sg->length & 3;
3528 void *pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ);
3529 struct scatterlist *psg = &qc->pad_sgent;
3531 WARN_ON(qc->dev->class != ATA_DEV_ATAPI);
3533 memset(pad_buf, 0, ATA_DMA_PAD_SZ);
3535 if (qc->tf.flags & ATA_TFLAG_WRITE)
3536 memcpy(pad_buf, qc->buf_virt + sg->length - qc->pad_len,
3539 sg_dma_address(psg) = ap->pad_dma + (qc->tag * ATA_DMA_PAD_SZ);
3540 sg_dma_len(psg) = ATA_DMA_PAD_SZ;
3542 sg->length -= qc->pad_len;
3543 if (sg->length == 0)
3546 DPRINTK("padding done, sg->length=%u pad_len=%u\n",
3547 sg->length, qc->pad_len);
3555 dma_address = dma_map_single(ap->dev, qc->buf_virt,
3557 if (dma_mapping_error(dma_address)) {
3559 sg->length += qc->pad_len;
3563 sg_dma_address(sg) = dma_address;
3564 sg_dma_len(sg) = sg->length;
3567 DPRINTK("mapped buffer of %d bytes for %s\n", sg_dma_len(sg),
3568 qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read");
3574 * ata_sg_setup - DMA-map the scatter-gather table associated with a command.
3575 * @qc: Command with scatter-gather table to be mapped.
3577 * DMA-map the scatter-gather table associated with queued_cmd @qc.
3580 * spin_lock_irqsave(host_set lock)
3583 * Zero on success, negative on error.
3587 static int ata_sg_setup(struct ata_queued_cmd *qc)
3589 struct ata_port *ap = qc->ap;
3590 struct scatterlist *sg = qc->__sg;
3591 struct scatterlist *lsg = &sg[qc->n_elem - 1];
3592 int n_elem, pre_n_elem, dir, trim_sg = 0;
3594 VPRINTK("ENTER, ata%u\n", ap->id);
3595 WARN_ON(!(qc->flags & ATA_QCFLAG_SG));
3597 /* we must lengthen transfers to end on a 32-bit boundary */
3598 qc->pad_len = lsg->length & 3;
3600 void *pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ);
3601 struct scatterlist *psg = &qc->pad_sgent;
3602 unsigned int offset;
3604 WARN_ON(qc->dev->class != ATA_DEV_ATAPI);
3606 memset(pad_buf, 0, ATA_DMA_PAD_SZ);
3609 * psg->page/offset are used to copy to-be-written
3610 * data in this function or read data in ata_sg_clean.
3612 offset = lsg->offset + lsg->length - qc->pad_len;
3613 psg->page = nth_page(lsg->page, offset >> PAGE_SHIFT);
3614 psg->offset = offset_in_page(offset);
3616 if (qc->tf.flags & ATA_TFLAG_WRITE) {
3617 void *addr = kmap_atomic(psg->page, KM_IRQ0);
3618 memcpy(pad_buf, addr + psg->offset, qc->pad_len);
3619 kunmap_atomic(addr, KM_IRQ0);
3622 sg_dma_address(psg) = ap->pad_dma + (qc->tag * ATA_DMA_PAD_SZ);
3623 sg_dma_len(psg) = ATA_DMA_PAD_SZ;
3625 lsg->length -= qc->pad_len;
3626 if (lsg->length == 0)
3629 DPRINTK("padding done, sg[%d].length=%u pad_len=%u\n",
3630 qc->n_elem - 1, lsg->length, qc->pad_len);
3633 pre_n_elem = qc->n_elem;
3634 if (trim_sg && pre_n_elem)
3643 n_elem = dma_map_sg(ap->dev, sg, pre_n_elem, dir);
3645 /* restore last sg */
3646 lsg->length += qc->pad_len;
3650 DPRINTK("%d sg elements mapped\n", n_elem);
3653 qc->n_elem = n_elem;
3659 * swap_buf_le16 - swap halves of 16-bit words in place
3660 * @buf: Buffer to swap
3661 * @buf_words: Number of 16-bit words in buffer.
3663 * Swap halves of 16-bit words if needed to convert from
3664 * little-endian byte order to native cpu byte order, or
3668 * Inherited from caller.
3670 void swap_buf_le16(u16 *buf, unsigned int buf_words)
3675 for (i = 0; i < buf_words; i++)
3676 buf[i] = le16_to_cpu(buf[i]);
3677 #endif /* __BIG_ENDIAN */
3681 * ata_mmio_data_xfer - Transfer data by MMIO
3682 * @dev: device for this I/O
3684 * @buflen: buffer length
3685 * @write_data: read/write
3687 * Transfer data from/to the device data register by MMIO.
3690 * Inherited from caller.
3693 void ata_mmio_data_xfer(struct ata_device *adev, unsigned char *buf,
3694 unsigned int buflen, int write_data)
3696 struct ata_port *ap = adev->ap;
3698 unsigned int words = buflen >> 1;
3699 u16 *buf16 = (u16 *) buf;
3700 void __iomem *mmio = (void __iomem *)ap->ioaddr.data_addr;
3702 /* Transfer multiple of 2 bytes */
3704 for (i = 0; i < words; i++)
3705 writew(le16_to_cpu(buf16[i]), mmio);
3707 for (i = 0; i < words; i++)
3708 buf16[i] = cpu_to_le16(readw(mmio));
3711 /* Transfer trailing 1 byte, if any. */
3712 if (unlikely(buflen & 0x01)) {
3713 u16 align_buf[1] = { 0 };
3714 unsigned char *trailing_buf = buf + buflen - 1;
3717 memcpy(align_buf, trailing_buf, 1);
3718 writew(le16_to_cpu(align_buf[0]), mmio);
3720 align_buf[0] = cpu_to_le16(readw(mmio));
3721 memcpy(trailing_buf, align_buf, 1);
3727 * ata_pio_data_xfer - Transfer data by PIO
3728 * @adev: device to target
3730 * @buflen: buffer length
3731 * @write_data: read/write
3733 * Transfer data from/to the device data register by PIO.
3736 * Inherited from caller.
3739 void ata_pio_data_xfer(struct ata_device *adev, unsigned char *buf,
3740 unsigned int buflen, int write_data)
3742 struct ata_port *ap = adev->ap;
3743 unsigned int words = buflen >> 1;
3745 /* Transfer multiple of 2 bytes */
3747 outsw(ap->ioaddr.data_addr, buf, words);
3749 insw(ap->ioaddr.data_addr, buf, words);
3751 /* Transfer trailing 1 byte, if any. */
3752 if (unlikely(buflen & 0x01)) {
3753 u16 align_buf[1] = { 0 };
3754 unsigned char *trailing_buf = buf + buflen - 1;
3757 memcpy(align_buf, trailing_buf, 1);
3758 outw(le16_to_cpu(align_buf[0]), ap->ioaddr.data_addr);
3760 align_buf[0] = cpu_to_le16(inw(ap->ioaddr.data_addr));
3761 memcpy(trailing_buf, align_buf, 1);
3767 * ata_pio_data_xfer_noirq - Transfer data by PIO
3768 * @adev: device to target
3770 * @buflen: buffer length
3771 * @write_data: read/write
3773 * Transfer data from/to the device data register by PIO. Do the
3774 * transfer with interrupts disabled.
3777 * Inherited from caller.
3780 void ata_pio_data_xfer_noirq(struct ata_device *adev, unsigned char *buf,
3781 unsigned int buflen, int write_data)
3783 unsigned long flags;
3784 local_irq_save(flags);
3785 ata_pio_data_xfer(adev, buf, buflen, write_data);
3786 local_irq_restore(flags);
3791 * ata_pio_sector - Transfer ATA_SECT_SIZE (512 bytes) of data.
3792 * @qc: Command on going
3794 * Transfer ATA_SECT_SIZE of data from/to the ATA device.
3797 * Inherited from caller.
3800 static void ata_pio_sector(struct ata_queued_cmd *qc)
3802 int do_write = (qc->tf.flags & ATA_TFLAG_WRITE);
3803 struct scatterlist *sg = qc->__sg;
3804 struct ata_port *ap = qc->ap;
3806 unsigned int offset;
3809 if (qc->cursect == (qc->nsect - 1))
3810 ap->hsm_task_state = HSM_ST_LAST;
3812 page = sg[qc->cursg].page;
3813 offset = sg[qc->cursg].offset + qc->cursg_ofs * ATA_SECT_SIZE;
3815 /* get the current page and offset */
3816 page = nth_page(page, (offset >> PAGE_SHIFT));
3817 offset %= PAGE_SIZE;
3819 DPRINTK("data %s\n", qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read");
3821 if (PageHighMem(page)) {
3822 unsigned long flags;
3824 /* FIXME: use a bounce buffer */
3825 local_irq_save(flags);
3826 buf = kmap_atomic(page, KM_IRQ0);
3828 /* do the actual data transfer */
3829 ap->ops->data_xfer(qc->dev, buf + offset, ATA_SECT_SIZE, do_write);
3831 kunmap_atomic(buf, KM_IRQ0);
3832 local_irq_restore(flags);
3834 buf = page_address(page);
3835 ap->ops->data_xfer(qc->dev, buf + offset, ATA_SECT_SIZE, do_write);
3841 if ((qc->cursg_ofs * ATA_SECT_SIZE) == (&sg[qc->cursg])->length) {
3848 * ata_pio_sectors - Transfer one or many 512-byte sectors.
3849 * @qc: Command on going
3851 * Transfer one or many ATA_SECT_SIZE of data from/to the
3852 * ATA device for the DRQ request.
3855 * Inherited from caller.
3858 static void ata_pio_sectors(struct ata_queued_cmd *qc)
3860 if (is_multi_taskfile(&qc->tf)) {
3861 /* READ/WRITE MULTIPLE */
3864 WARN_ON(qc->dev->multi_count == 0);
3866 nsect = min(qc->nsect - qc->cursect, qc->dev->multi_count);
3874 * atapi_send_cdb - Write CDB bytes to hardware
3875 * @ap: Port to which ATAPI device is attached.
3876 * @qc: Taskfile currently active
3878 * When device has indicated its readiness to accept
3879 * a CDB, this function is called. Send the CDB.
3885 static void atapi_send_cdb(struct ata_port *ap, struct ata_queued_cmd *qc)
3888 DPRINTK("send cdb\n");
3889 WARN_ON(qc->dev->cdb_len < 12);
3891 ap->ops->data_xfer(qc->dev, qc->cdb, qc->dev->cdb_len, 1);
3892 ata_altstatus(ap); /* flush */
3894 switch (qc->tf.protocol) {
3895 case ATA_PROT_ATAPI:
3896 ap->hsm_task_state = HSM_ST;
3898 case ATA_PROT_ATAPI_NODATA:
3899 ap->hsm_task_state = HSM_ST_LAST;
3901 case ATA_PROT_ATAPI_DMA:
3902 ap->hsm_task_state = HSM_ST_LAST;
3903 /* initiate bmdma */
3904 ap->ops->bmdma_start(qc);
3910 * __atapi_pio_bytes - Transfer data from/to the ATAPI device.
3911 * @qc: Command on going
3912 * @bytes: number of bytes
3914 * Transfer Transfer data from/to the ATAPI device.
3917 * Inherited from caller.
3921 static void __atapi_pio_bytes(struct ata_queued_cmd *qc, unsigned int bytes)
3923 int do_write = (qc->tf.flags & ATA_TFLAG_WRITE);
3924 struct scatterlist *sg = qc->__sg;
3925 struct ata_port *ap = qc->ap;
3928 unsigned int offset, count;
3930 if (qc->curbytes + bytes >= qc->nbytes)
3931 ap->hsm_task_state = HSM_ST_LAST;
3934 if (unlikely(qc->cursg >= qc->n_elem)) {
3936 * The end of qc->sg is reached and the device expects
3937 * more data to transfer. In order not to overrun qc->sg
3938 * and fulfill length specified in the byte count register,
3939 * - for read case, discard trailing data from the device
3940 * - for write case, padding zero data to the device
3942 u16 pad_buf[1] = { 0 };
3943 unsigned int words = bytes >> 1;
3946 if (words) /* warning if bytes > 1 */
3947 ata_dev_printk(qc->dev, KERN_WARNING,
3948 "%u bytes trailing data\n", bytes);
3950 for (i = 0; i < words; i++)
3951 ap->ops->data_xfer(qc->dev, (unsigned char*)pad_buf, 2, do_write);
3953 ap->hsm_task_state = HSM_ST_LAST;
3957 sg = &qc->__sg[qc->cursg];
3960 offset = sg->offset + qc->cursg_ofs;
3962 /* get the current page and offset */
3963 page = nth_page(page, (offset >> PAGE_SHIFT));
3964 offset %= PAGE_SIZE;
3966 /* don't overrun current sg */
3967 count = min(sg->length - qc->cursg_ofs, bytes);
3969 /* don't cross page boundaries */
3970 count = min(count, (unsigned int)PAGE_SIZE - offset);
3972 DPRINTK("data %s\n", qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read");
3974 if (PageHighMem(page)) {
3975 unsigned long flags;
3977 /* FIXME: use bounce buffer */
3978 local_irq_save(flags);
3979 buf = kmap_atomic(page, KM_IRQ0);
3981 /* do the actual data transfer */
3982 ap->ops->data_xfer(qc->dev, buf + offset, count, do_write);
3984 kunmap_atomic(buf, KM_IRQ0);
3985 local_irq_restore(flags);
3987 buf = page_address(page);
3988 ap->ops->data_xfer(qc->dev, buf + offset, count, do_write);
3992 qc->curbytes += count;
3993 qc->cursg_ofs += count;
3995 if (qc->cursg_ofs == sg->length) {
4005 * atapi_pio_bytes - Transfer data from/to the ATAPI device.
4006 * @qc: Command on going
4008 * Transfer Transfer data from/to the ATAPI device.
4011 * Inherited from caller.
4014 static void atapi_pio_bytes(struct ata_queued_cmd *qc)
4016 struct ata_port *ap = qc->ap;
4017 struct ata_device *dev = qc->dev;
4018 unsigned int ireason, bc_lo, bc_hi, bytes;
4019 int i_write, do_write = (qc->tf.flags & ATA_TFLAG_WRITE) ? 1 : 0;
4021 /* Abuse qc->result_tf for temp storage of intermediate TF
4022 * here to save some kernel stack usage.
4023 * For normal completion, qc->result_tf is not relevant. For
4024 * error, qc->result_tf is later overwritten by ata_qc_complete().
4025 * So, the correctness of qc->result_tf is not affected.
4027 ap->ops->tf_read(ap, &qc->result_tf);
4028 ireason = qc->result_tf.nsect;
4029 bc_lo = qc->result_tf.lbam;
4030 bc_hi = qc->result_tf.lbah;
4031 bytes = (bc_hi << 8) | bc_lo;
4033 /* shall be cleared to zero, indicating xfer of data */
4034 if (ireason & (1 << 0))
4037 /* make sure transfer direction matches expected */
4038 i_write = ((ireason & (1 << 1)) == 0) ? 1 : 0;
4039 if (do_write != i_write)
4042 VPRINTK("ata%u: xfering %d bytes\n", ap->id, bytes);
4044 __atapi_pio_bytes(qc, bytes);
4049 ata_dev_printk(dev, KERN_INFO, "ATAPI check failed\n");
4050 qc->err_mask |= AC_ERR_HSM;
4051 ap->hsm_task_state = HSM_ST_ERR;
4055 * ata_hsm_ok_in_wq - Check if the qc can be handled in the workqueue.
4056 * @ap: the target ata_port
4060 * 1 if ok in workqueue, 0 otherwise.
4063 static inline int ata_hsm_ok_in_wq(struct ata_port *ap, struct ata_queued_cmd *qc)
4065 if (qc->tf.flags & ATA_TFLAG_POLLING)
4068 if (ap->hsm_task_state == HSM_ST_FIRST) {
4069 if (qc->tf.protocol == ATA_PROT_PIO &&
4070 (qc->tf.flags & ATA_TFLAG_WRITE))
4073 if (is_atapi_taskfile(&qc->tf) &&
4074 !(qc->dev->flags & ATA_DFLAG_CDB_INTR))
4082 * ata_hsm_qc_complete - finish a qc running on standard HSM
4083 * @qc: Command to complete
4084 * @in_wq: 1 if called from workqueue, 0 otherwise
4086 * Finish @qc which is running on standard HSM.
4089 * If @in_wq is zero, spin_lock_irqsave(host_set lock).
4090 * Otherwise, none on entry and grabs host lock.
4092 static void ata_hsm_qc_complete(struct ata_queued_cmd *qc, int in_wq)
4094 struct ata_port *ap = qc->ap;
4095 unsigned long flags;
4097 if (ap->ops->error_handler) {
4099 spin_lock_irqsave(&ap->host_set->lock, flags);
4101 /* EH might have kicked in while host_set lock
4104 qc = ata_qc_from_tag(ap, qc->tag);
4106 if (likely(!(qc->err_mask & AC_ERR_HSM))) {
4108 ata_qc_complete(qc);
4110 ata_port_freeze(ap);
4113 spin_unlock_irqrestore(&ap->host_set->lock, flags);
4115 if (likely(!(qc->err_mask & AC_ERR_HSM)))
4116 ata_qc_complete(qc);
4118 ata_port_freeze(ap);
4122 spin_lock_irqsave(&ap->host_set->lock, flags);
4124 ata_qc_complete(qc);
4125 spin_unlock_irqrestore(&ap->host_set->lock, flags);
4127 ata_qc_complete(qc);
4130 ata_altstatus(ap); /* flush */
4134 * ata_hsm_move - move the HSM to the next state.
4135 * @ap: the target ata_port
4137 * @status: current device status
4138 * @in_wq: 1 if called from workqueue, 0 otherwise
4141 * 1 when poll next status needed, 0 otherwise.
4144 static int ata_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc,
4145 u8 status, int in_wq)
4147 unsigned long flags = 0;
4150 WARN_ON((qc->flags & ATA_QCFLAG_ACTIVE) == 0);
4152 /* Make sure ata_qc_issue_prot() does not throw things
4153 * like DMA polling into the workqueue. Notice that
4154 * in_wq is not equivalent to (qc->tf.flags & ATA_TFLAG_POLLING).
4156 WARN_ON(in_wq != ata_hsm_ok_in_wq(ap, qc));
4159 DPRINTK("ata%u: protocol %d task_state %d (dev_stat 0x%X)\n",
4160 ap->id, qc->tf.protocol, ap->hsm_task_state, status);
4162 switch (ap->hsm_task_state) {
4164 /* Send first data block or PACKET CDB */
4166 /* If polling, we will stay in the work queue after
4167 * sending the data. Otherwise, interrupt handler
4168 * takes over after sending the data.
4170 poll_next = (qc->tf.flags & ATA_TFLAG_POLLING);
4172 /* check device status */
4173 if (unlikely((status & ATA_DRQ) == 0)) {
4174 /* handle BSY=0, DRQ=0 as error */
4175 if (likely(status & (ATA_ERR | ATA_DF)))
4176 /* device stops HSM for abort/error */
4177 qc->err_mask |= AC_ERR_DEV;
4179 /* HSM violation. Let EH handle this */
4180 qc->err_mask |= AC_ERR_HSM;
4182 ap->hsm_task_state = HSM_ST_ERR;
4186 /* Device should not ask for data transfer (DRQ=1)
4187 * when it finds something wrong.
4188 * We ignore DRQ here and stop the HSM by
4189 * changing hsm_task_state to HSM_ST_ERR and
4190 * let the EH abort the command or reset the device.
4192 if (unlikely(status & (ATA_ERR | ATA_DF))) {
4193 printk(KERN_WARNING "ata%d: DRQ=1 with device error, dev_stat 0x%X\n",
4195 qc->err_mask |= AC_ERR_HSM;
4196 ap->hsm_task_state = HSM_ST_ERR;
4200 /* Send the CDB (atapi) or the first data block (ata pio out).
4201 * During the state transition, interrupt handler shouldn't
4202 * be invoked before the data transfer is complete and
4203 * hsm_task_state is changed. Hence, the following locking.
4206 spin_lock_irqsave(&ap->host_set->lock, flags);
4208 if (qc->tf.protocol == ATA_PROT_PIO) {
4209 /* PIO data out protocol.
4210 * send first data block.
4213 /* ata_pio_sectors() might change the state
4214 * to HSM_ST_LAST. so, the state is changed here
4215 * before ata_pio_sectors().
4217 ap->hsm_task_state = HSM_ST;
4218 ata_pio_sectors(qc);
4219 ata_altstatus(ap); /* flush */
4222 atapi_send_cdb(ap, qc);
4225 spin_unlock_irqrestore(&ap->host_set->lock, flags);
4227 /* if polling, ata_pio_task() handles the rest.
4228 * otherwise, interrupt handler takes over from here.
4233 /* complete command or read/write the data register */
4234 if (qc->tf.protocol == ATA_PROT_ATAPI) {
4235 /* ATAPI PIO protocol */
4236 if ((status & ATA_DRQ) == 0) {
4237 /* No more data to transfer or device error.
4238 * Device error will be tagged in HSM_ST_LAST.
4240 ap->hsm_task_state = HSM_ST_LAST;
4244 /* Device should not ask for data transfer (DRQ=1)
4245 * when it finds something wrong.
4246 * We ignore DRQ here and stop the HSM by
4247 * changing hsm_task_state to HSM_ST_ERR and
4248 * let the EH abort the command or reset the device.
4250 if (unlikely(status & (ATA_ERR | ATA_DF))) {
4251 printk(KERN_WARNING "ata%d: DRQ=1 with device error, dev_stat 0x%X\n",
4253 qc->err_mask |= AC_ERR_HSM;
4254 ap->hsm_task_state = HSM_ST_ERR;
4258 atapi_pio_bytes(qc);
4260 if (unlikely(ap->hsm_task_state == HSM_ST_ERR))
4261 /* bad ireason reported by device */
4265 /* ATA PIO protocol */
4266 if (unlikely((status & ATA_DRQ) == 0)) {
4267 /* handle BSY=0, DRQ=0 as error */
4268 if (likely(status & (ATA_ERR | ATA_DF)))
4269 /* device stops HSM for abort/error */
4270 qc->err_mask |= AC_ERR_DEV;
4272 /* HSM violation. Let EH handle this */
4273 qc->err_mask |= AC_ERR_HSM;
4275 ap->hsm_task_state = HSM_ST_ERR;
4279 /* For PIO reads, some devices may ask for
4280 * data transfer (DRQ=1) alone with ERR=1.
4281 * We respect DRQ here and transfer one
4282 * block of junk data before changing the
4283 * hsm_task_state to HSM_ST_ERR.
4285 * For PIO writes, ERR=1 DRQ=1 doesn't make
4286 * sense since the data block has been
4287 * transferred to the device.
4289 if (unlikely(status & (ATA_ERR | ATA_DF))) {
4290 /* data might be corrputed */
4291 qc->err_mask |= AC_ERR_DEV;
4293 if (!(qc->tf.flags & ATA_TFLAG_WRITE)) {
4294 ata_pio_sectors(qc);
4296 status = ata_wait_idle(ap);
4299 if (status & (ATA_BUSY | ATA_DRQ))
4300 qc->err_mask |= AC_ERR_HSM;
4302 /* ata_pio_sectors() might change the
4303 * state to HSM_ST_LAST. so, the state
4304 * is changed after ata_pio_sectors().
4306 ap->hsm_task_state = HSM_ST_ERR;
4310 ata_pio_sectors(qc);
4312 if (ap->hsm_task_state == HSM_ST_LAST &&
4313 (!(qc->tf.flags & ATA_TFLAG_WRITE))) {
4316 status = ata_wait_idle(ap);
4321 ata_altstatus(ap); /* flush */
4326 if (unlikely(!ata_ok(status))) {
4327 qc->err_mask |= __ac_err_mask(status);
4328 ap->hsm_task_state = HSM_ST_ERR;
4332 /* no more data to transfer */
4333 DPRINTK("ata%u: dev %u command complete, drv_stat 0x%x\n",
4334 ap->id, qc->dev->devno, status);
4336 WARN_ON(qc->err_mask);
4338 ap->hsm_task_state = HSM_ST_IDLE;
4340 /* complete taskfile transaction */
4341 ata_hsm_qc_complete(qc, in_wq);
4347 /* make sure qc->err_mask is available to
4348 * know what's wrong and recover
4350 WARN_ON(qc->err_mask == 0);
4352 ap->hsm_task_state = HSM_ST_IDLE;
4354 /* complete taskfile transaction */
4355 ata_hsm_qc_complete(qc, in_wq);
4367 static void ata_pio_task(void *_data)
4369 struct ata_queued_cmd *qc = _data;
4370 struct ata_port *ap = qc->ap;
4375 WARN_ON(ap->hsm_task_state == HSM_ST_IDLE);
4378 * This is purely heuristic. This is a fast path.
4379 * Sometimes when we enter, BSY will be cleared in
4380 * a chk-status or two. If not, the drive is probably seeking
4381 * or something. Snooze for a couple msecs, then
4382 * chk-status again. If still busy, queue delayed work.
4384 status = ata_busy_wait(ap, ATA_BUSY, 5);
4385 if (status & ATA_BUSY) {
4387 status = ata_busy_wait(ap, ATA_BUSY, 10);
4388 if (status & ATA_BUSY) {
4389 ata_port_queue_task(ap, ata_pio_task, qc, ATA_SHORT_PAUSE);
4395 poll_next = ata_hsm_move(ap, qc, status, 1);
4397 /* another command or interrupt handler
4398 * may be running at this point.
4405 * ata_qc_new - Request an available ATA command, for queueing
4406 * @ap: Port associated with device @dev
4407 * @dev: Device from whom we request an available command structure
4413 static struct ata_queued_cmd *ata_qc_new(struct ata_port *ap)
4415 struct ata_queued_cmd *qc = NULL;
4418 /* no command while frozen */
4419 if (unlikely(ap->flags & ATA_FLAG_FROZEN))
4422 /* the last tag is reserved for internal command. */
4423 for (i = 0; i < ATA_MAX_QUEUE - 1; i++)
4424 if (!test_and_set_bit(i, &ap->qc_allocated)) {
4425 qc = __ata_qc_from_tag(ap, i);
4436 * ata_qc_new_init - Request an available ATA command, and initialize it
4437 * @dev: Device from whom we request an available command structure
4443 struct ata_queued_cmd *ata_qc_new_init(struct ata_device *dev)
4445 struct ata_port *ap = dev->ap;
4446 struct ata_queued_cmd *qc;
4448 qc = ata_qc_new(ap);
4461 * ata_qc_free - free unused ata_queued_cmd
4462 * @qc: Command to complete
4464 * Designed to free unused ata_queued_cmd object
4465 * in case something prevents using it.
4468 * spin_lock_irqsave(host_set lock)
4470 void ata_qc_free(struct ata_queued_cmd *qc)
4472 struct ata_port *ap = qc->ap;
4475 WARN_ON(qc == NULL); /* ata_qc_from_tag _might_ return NULL */
4479 if (likely(ata_tag_valid(tag))) {
4480 qc->tag = ATA_TAG_POISON;
4481 clear_bit(tag, &ap->qc_allocated);
4485 void __ata_qc_complete(struct ata_queued_cmd *qc)
4487 struct ata_port *ap = qc->ap;
4489 WARN_ON(qc == NULL); /* ata_qc_from_tag _might_ return NULL */
4490 WARN_ON(!(qc->flags & ATA_QCFLAG_ACTIVE));
4492 if (likely(qc->flags & ATA_QCFLAG_DMAMAP))
4495 /* command should be marked inactive atomically with qc completion */
4496 if (qc->tf.protocol == ATA_PROT_NCQ)
4497 ap->sactive &= ~(1 << qc->tag);
4499 ap->active_tag = ATA_TAG_POISON;
4501 /* atapi: mark qc as inactive to prevent the interrupt handler
4502 * from completing the command twice later, before the error handler
4503 * is called. (when rc != 0 and atapi request sense is needed)
4505 qc->flags &= ~ATA_QCFLAG_ACTIVE;
4506 ap->qc_active &= ~(1 << qc->tag);
4508 /* call completion callback */
4509 qc->complete_fn(qc);
4513 * ata_qc_complete - Complete an active ATA command
4514 * @qc: Command to complete
4515 * @err_mask: ATA Status register contents
4517 * Indicate to the mid and upper layers that an ATA
4518 * command has completed, with either an ok or not-ok status.
4521 * spin_lock_irqsave(host_set lock)
4523 void ata_qc_complete(struct ata_queued_cmd *qc)
4525 struct ata_port *ap = qc->ap;
4527 /* XXX: New EH and old EH use different mechanisms to
4528 * synchronize EH with regular execution path.
4530 * In new EH, a failed qc is marked with ATA_QCFLAG_FAILED.
4531 * Normal execution path is responsible for not accessing a
4532 * failed qc. libata core enforces the rule by returning NULL
4533 * from ata_qc_from_tag() for failed qcs.
4535 * Old EH depends on ata_qc_complete() nullifying completion
4536 * requests if ATA_QCFLAG_EH_SCHEDULED is set. Old EH does
4537 * not synchronize with interrupt handler. Only PIO task is
4540 if (ap->ops->error_handler) {
4541 WARN_ON(ap->flags & ATA_FLAG_FROZEN);
4543 if (unlikely(qc->err_mask))
4544 qc->flags |= ATA_QCFLAG_FAILED;
4546 if (unlikely(qc->flags & ATA_QCFLAG_FAILED)) {
4547 if (!ata_tag_internal(qc->tag)) {
4548 /* always fill result TF for failed qc */
4549 ap->ops->tf_read(ap, &qc->result_tf);
4550 ata_qc_schedule_eh(qc);
4555 /* read result TF if requested */
4556 if (qc->flags & ATA_QCFLAG_RESULT_TF)
4557 ap->ops->tf_read(ap, &qc->result_tf);
4559 __ata_qc_complete(qc);
4561 if (qc->flags & ATA_QCFLAG_EH_SCHEDULED)
4564 /* read result TF if failed or requested */
4565 if (qc->err_mask || qc->flags & ATA_QCFLAG_RESULT_TF)
4566 ap->ops->tf_read(ap, &qc->result_tf);
4568 __ata_qc_complete(qc);
4573 * ata_qc_complete_multiple - Complete multiple qcs successfully
4574 * @ap: port in question
4575 * @qc_active: new qc_active mask
4576 * @finish_qc: LLDD callback invoked before completing a qc
4578 * Complete in-flight commands. This functions is meant to be
4579 * called from low-level driver's interrupt routine to complete
4580 * requests normally. ap->qc_active and @qc_active is compared
4581 * and commands are completed accordingly.
4584 * spin_lock_irqsave(host_set lock)
4587 * Number of completed commands on success, -errno otherwise.
4589 int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active,
4590 void (*finish_qc)(struct ata_queued_cmd *))
4596 done_mask = ap->qc_active ^ qc_active;
4598 if (unlikely(done_mask & qc_active)) {
4599 ata_port_printk(ap, KERN_ERR, "illegal qc_active transition "
4600 "(%08x->%08x)\n", ap->qc_active, qc_active);
4604 for (i = 0; i < ATA_MAX_QUEUE; i++) {
4605 struct ata_queued_cmd *qc;
4607 if (!(done_mask & (1 << i)))
4610 if ((qc = ata_qc_from_tag(ap, i))) {
4613 ata_qc_complete(qc);
4621 static inline int ata_should_dma_map(struct ata_queued_cmd *qc)
4623 struct ata_port *ap = qc->ap;
4625 switch (qc->tf.protocol) {
4628 case ATA_PROT_ATAPI_DMA:
4631 case ATA_PROT_ATAPI:
4633 if (ap->flags & ATA_FLAG_PIO_DMA)
4646 * ata_qc_issue - issue taskfile to device
4647 * @qc: command to issue to device
4649 * Prepare an ATA command to submission to device.
4650 * This includes mapping the data into a DMA-able
4651 * area, filling in the S/G table, and finally
4652 * writing the taskfile to hardware, starting the command.
4655 * spin_lock_irqsave(host_set lock)
4657 void ata_qc_issue(struct ata_queued_cmd *qc)
4659 struct ata_port *ap = qc->ap;
4661 /* Make sure only one non-NCQ command is outstanding. The
4662 * check is skipped for old EH because it reuses active qc to
4663 * request ATAPI sense.
4665 WARN_ON(ap->ops->error_handler && ata_tag_valid(ap->active_tag));
4667 if (qc->tf.protocol == ATA_PROT_NCQ) {
4668 WARN_ON(ap->sactive & (1 << qc->tag));
4669 ap->sactive |= 1 << qc->tag;
4671 WARN_ON(ap->sactive);
4672 ap->active_tag = qc->tag;
4675 qc->flags |= ATA_QCFLAG_ACTIVE;
4676 ap->qc_active |= 1 << qc->tag;
4678 if (ata_should_dma_map(qc)) {
4679 if (qc->flags & ATA_QCFLAG_SG) {
4680 if (ata_sg_setup(qc))
4682 } else if (qc->flags & ATA_QCFLAG_SINGLE) {
4683 if (ata_sg_setup_one(qc))
4687 qc->flags &= ~ATA_QCFLAG_DMAMAP;
4690 ap->ops->qc_prep(qc);
4692 qc->err_mask |= ap->ops->qc_issue(qc);
4693 if (unlikely(qc->err_mask))
4698 qc->flags &= ~ATA_QCFLAG_DMAMAP;
4699 qc->err_mask |= AC_ERR_SYSTEM;
4701 ata_qc_complete(qc);
4705 * ata_qc_issue_prot - issue taskfile to device in proto-dependent manner
4706 * @qc: command to issue to device
4708 * Using various libata functions and hooks, this function
4709 * starts an ATA command. ATA commands are grouped into
4710 * classes called "protocols", and issuing each type of protocol
4711 * is slightly different.
4713 * May be used as the qc_issue() entry in ata_port_operations.
4716 * spin_lock_irqsave(host_set lock)
4719 * Zero on success, AC_ERR_* mask on failure
4722 unsigned int ata_qc_issue_prot(struct ata_queued_cmd *qc)
4724 struct ata_port *ap = qc->ap;
4726 /* Use polling pio if the LLD doesn't handle
4727 * interrupt driven pio and atapi CDB interrupt.
4729 if (ap->flags & ATA_FLAG_PIO_POLLING) {
4730 switch (qc->tf.protocol) {
4732 case ATA_PROT_ATAPI:
4733 case ATA_PROT_ATAPI_NODATA:
4734 qc->tf.flags |= ATA_TFLAG_POLLING;
4736 case ATA_PROT_ATAPI_DMA:
4737 if (qc->dev->flags & ATA_DFLAG_CDB_INTR)
4738 /* see ata_check_atapi_dma() */
4746 /* select the device */
4747 ata_dev_select(ap, qc->dev->devno, 1, 0);
4749 /* start the command */
4750 switch (qc->tf.protocol) {
4751 case ATA_PROT_NODATA:
4752 if (qc->tf.flags & ATA_TFLAG_POLLING)
4753 ata_qc_set_polling(qc);
4755 ata_tf_to_host(ap, &qc->tf);
4756 ap->hsm_task_state = HSM_ST_LAST;
4758 if (qc->tf.flags & ATA_TFLAG_POLLING)
4759 ata_port_queue_task(ap, ata_pio_task, qc, 0);
4764 WARN_ON(qc->tf.flags & ATA_TFLAG_POLLING);
4766 ap->ops->tf_load(ap, &qc->tf); /* load tf registers */
4767 ap->ops->bmdma_setup(qc); /* set up bmdma */
4768 ap->ops->bmdma_start(qc); /* initiate bmdma */
4769 ap->hsm_task_state = HSM_ST_LAST;
4773 if (qc->tf.flags & ATA_TFLAG_POLLING)
4774 ata_qc_set_polling(qc);
4776 ata_tf_to_host(ap, &qc->tf);
4778 if (qc->tf.flags & ATA_TFLAG_WRITE) {
4779 /* PIO data out protocol */
4780 ap->hsm_task_state = HSM_ST_FIRST;
4781 ata_port_queue_task(ap, ata_pio_task, qc, 0);
4783 /* always send first data block using
4784 * the ata_pio_task() codepath.
4787 /* PIO data in protocol */
4788 ap->hsm_task_state = HSM_ST;
4790 if (qc->tf.flags & ATA_TFLAG_POLLING)
4791 ata_port_queue_task(ap, ata_pio_task, qc, 0);
4793 /* if polling, ata_pio_task() handles the rest.
4794 * otherwise, interrupt handler takes over from here.
4800 case ATA_PROT_ATAPI:
4801 case ATA_PROT_ATAPI_NODATA:
4802 if (qc->tf.flags & ATA_TFLAG_POLLING)
4803 ata_qc_set_polling(qc);
4805 ata_tf_to_host(ap, &qc->tf);
4807 ap->hsm_task_state = HSM_ST_FIRST;
4809 /* send cdb by polling if no cdb interrupt */
4810 if ((!(qc->dev->flags & ATA_DFLAG_CDB_INTR)) ||
4811 (qc->tf.flags & ATA_TFLAG_POLLING))
4812 ata_port_queue_task(ap, ata_pio_task, qc, 0);
4815 case ATA_PROT_ATAPI_DMA:
4816 WARN_ON(qc->tf.flags & ATA_TFLAG_POLLING);
4818 ap->ops->tf_load(ap, &qc->tf); /* load tf registers */
4819 ap->ops->bmdma_setup(qc); /* set up bmdma */
4820 ap->hsm_task_state = HSM_ST_FIRST;
4822 /* send cdb by polling if no cdb interrupt */
4823 if (!(qc->dev->flags & ATA_DFLAG_CDB_INTR))
4824 ata_port_queue_task(ap, ata_pio_task, qc, 0);
4829 return AC_ERR_SYSTEM;
4836 * ata_host_intr - Handle host interrupt for given (port, task)
4837 * @ap: Port on which interrupt arrived (possibly...)
4838 * @qc: Taskfile currently active in engine
4840 * Handle host interrupt for given queued command. Currently,
4841 * only DMA interrupts are handled. All other commands are
4842 * handled via polling with interrupts disabled (nIEN bit).
4845 * spin_lock_irqsave(host_set lock)
4848 * One if interrupt was handled, zero if not (shared irq).
4851 inline unsigned int ata_host_intr (struct ata_port *ap,
4852 struct ata_queued_cmd *qc)
4854 u8 status, host_stat = 0;
4856 VPRINTK("ata%u: protocol %d task_state %d\n",
4857 ap->id, qc->tf.protocol, ap->hsm_task_state);
4859 /* Check whether we are expecting interrupt in this state */
4860 switch (ap->hsm_task_state) {
4862 /* Some pre-ATAPI-4 devices assert INTRQ
4863 * at this state when ready to receive CDB.
4866 /* Check the ATA_DFLAG_CDB_INTR flag is enough here.
4867 * The flag was turned on only for atapi devices.
4868 * No need to check is_atapi_taskfile(&qc->tf) again.
4870 if (!(qc->dev->flags & ATA_DFLAG_CDB_INTR))
4874 if (qc->tf.protocol == ATA_PROT_DMA ||
4875 qc->tf.protocol == ATA_PROT_ATAPI_DMA) {
4876 /* check status of DMA engine */
4877 host_stat = ap->ops->bmdma_status(ap);
4878 VPRINTK("ata%u: host_stat 0x%X\n", ap->id, host_stat);
4880 /* if it's not our irq... */
4881 if (!(host_stat & ATA_DMA_INTR))
4884 /* before we do anything else, clear DMA-Start bit */
4885 ap->ops->bmdma_stop(qc);
4887 if (unlikely(host_stat & ATA_DMA_ERR)) {
4888 /* error when transfering data to/from memory */
4889 qc->err_mask |= AC_ERR_HOST_BUS;
4890 ap->hsm_task_state = HSM_ST_ERR;
4900 /* check altstatus */
4901 status = ata_altstatus(ap);
4902 if (status & ATA_BUSY)
4905 /* check main status, clearing INTRQ */
4906 status = ata_chk_status(ap);
4907 if (unlikely(status & ATA_BUSY))
4910 /* ack bmdma irq events */
4911 ap->ops->irq_clear(ap);
4913 ata_hsm_move(ap, qc, status, 0);
4914 return 1; /* irq handled */
4917 ap->stats.idle_irq++;
4920 if ((ap->stats.idle_irq % 1000) == 0) {
4921 ata_irq_ack(ap, 0); /* debug trap */
4922 ata_port_printk(ap, KERN_WARNING, "irq trap\n");
4926 return 0; /* irq not handled */
4930 * ata_interrupt - Default ATA host interrupt handler
4931 * @irq: irq line (unused)
4932 * @dev_instance: pointer to our ata_host_set information structure
4935 * Default interrupt handler for PCI IDE devices. Calls
4936 * ata_host_intr() for each port that is not disabled.
4939 * Obtains host_set lock during operation.
4942 * IRQ_NONE or IRQ_HANDLED.
4945 irqreturn_t ata_interrupt (int irq, void *dev_instance, struct pt_regs *regs)
4947 struct ata_host_set *host_set = dev_instance;
4949 unsigned int handled = 0;
4950 unsigned long flags;
4952 /* TODO: make _irqsave conditional on x86 PCI IDE legacy mode */
4953 spin_lock_irqsave(&host_set->lock, flags);
4955 for (i = 0; i < host_set->n_ports; i++) {
4956 struct ata_port *ap;
4958 ap = host_set->ports[i];
4960 !(ap->flags & ATA_FLAG_DISABLED)) {
4961 struct ata_queued_cmd *qc;
4963 qc = ata_qc_from_tag(ap, ap->active_tag);
4964 if (qc && (!(qc->tf.flags & ATA_TFLAG_POLLING)) &&
4965 (qc->flags & ATA_QCFLAG_ACTIVE))
4966 handled |= ata_host_intr(ap, qc);
4970 spin_unlock_irqrestore(&host_set->lock, flags);
4972 return IRQ_RETVAL(handled);
4976 * sata_scr_valid - test whether SCRs are accessible
4977 * @ap: ATA port to test SCR accessibility for
4979 * Test whether SCRs are accessible for @ap.
4985 * 1 if SCRs are accessible, 0 otherwise.
4987 int sata_scr_valid(struct ata_port *ap)
4989 return ap->cbl == ATA_CBL_SATA && ap->ops->scr_read;
4993 * sata_scr_read - read SCR register of the specified port
4994 * @ap: ATA port to read SCR for
4996 * @val: Place to store read value
4998 * Read SCR register @reg of @ap into *@val. This function is
4999 * guaranteed to succeed if the cable type of the port is SATA
5000 * and the port implements ->scr_read.
5006 * 0 on success, negative errno on failure.
5008 int sata_scr_read(struct ata_port *ap, int reg, u32 *val)
5010 if (sata_scr_valid(ap)) {
5011 *val = ap->ops->scr_read(ap, reg);
5018 * sata_scr_write - write SCR register of the specified port
5019 * @ap: ATA port to write SCR for
5020 * @reg: SCR to write
5021 * @val: value to write
5023 * Write @val to SCR register @reg of @ap. This function is
5024 * guaranteed to succeed if the cable type of the port is SATA
5025 * and the port implements ->scr_read.
5031 * 0 on success, negative errno on failure.
5033 int sata_scr_write(struct ata_port *ap, int reg, u32 val)
5035 if (sata_scr_valid(ap)) {
5036 ap->ops->scr_write(ap, reg, val);
5043 * sata_scr_write_flush - write SCR register of the specified port and flush
5044 * @ap: ATA port to write SCR for
5045 * @reg: SCR to write
5046 * @val: value to write
5048 * This function is identical to sata_scr_write() except that this
5049 * function performs flush after writing to the register.
5055 * 0 on success, negative errno on failure.
5057 int sata_scr_write_flush(struct ata_port *ap, int reg, u32 val)
5059 if (sata_scr_valid(ap)) {
5060 ap->ops->scr_write(ap, reg, val);
5061 ap->ops->scr_read(ap, reg);
5068 * ata_port_online - test whether the given port is online
5069 * @ap: ATA port to test
5071 * Test whether @ap is online. Note that this function returns 0
5072 * if online status of @ap cannot be obtained, so
5073 * ata_port_online(ap) != !ata_port_offline(ap).
5079 * 1 if the port online status is available and online.
5081 int ata_port_online(struct ata_port *ap)
5085 if (!sata_scr_read(ap, SCR_STATUS, &sstatus) && (sstatus & 0xf) == 0x3)
5091 * ata_port_offline - test whether the given port is offline
5092 * @ap: ATA port to test
5094 * Test whether @ap is offline. Note that this function returns
5095 * 0 if offline status of @ap cannot be obtained, so
5096 * ata_port_online(ap) != !ata_port_offline(ap).
5102 * 1 if the port offline status is available and offline.
5104 int ata_port_offline(struct ata_port *ap)
5108 if (!sata_scr_read(ap, SCR_STATUS, &sstatus) && (sstatus & 0xf) != 0x3)
5114 * Execute a 'simple' command, that only consists of the opcode 'cmd' itself,
5115 * without filling any other registers
5117 static int ata_do_simple_cmd(struct ata_device *dev, u8 cmd)
5119 struct ata_taskfile tf;
5122 ata_tf_init(dev, &tf);
5125 tf.flags |= ATA_TFLAG_DEVICE;
5126 tf.protocol = ATA_PROT_NODATA;
5128 err = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0);
5130 ata_dev_printk(dev, KERN_ERR, "%s: ata command failed: %d\n",
5136 static int ata_flush_cache(struct ata_device *dev)
5140 if (!ata_try_flush_cache(dev))
5143 if (ata_id_has_flush_ext(dev->id))
5144 cmd = ATA_CMD_FLUSH_EXT;
5146 cmd = ATA_CMD_FLUSH;
5148 return ata_do_simple_cmd(dev, cmd);
5151 static int ata_standby_drive(struct ata_device *dev)
5153 return ata_do_simple_cmd(dev, ATA_CMD_STANDBYNOW1);
5156 static int ata_start_drive(struct ata_device *dev)
5158 return ata_do_simple_cmd(dev, ATA_CMD_IDLEIMMEDIATE);
5162 * ata_device_resume - wakeup a previously suspended devices
5163 * @dev: the device to resume
5165 * Kick the drive back into action, by sending it an idle immediate
5166 * command and making sure its transfer mode matches between drive
5170 int ata_device_resume(struct ata_device *dev)
5172 struct ata_port *ap = dev->ap;
5174 if (ap->flags & ATA_FLAG_SUSPENDED) {
5175 struct ata_device *failed_dev;
5177 ata_busy_wait(ap, ATA_BUSY | ATA_DRQ, 200000);
5179 ap->flags &= ~ATA_FLAG_SUSPENDED;
5180 while (ata_set_mode(ap, &failed_dev))
5181 ata_dev_disable(failed_dev);
5183 if (!ata_dev_enabled(dev))
5185 if (dev->class == ATA_DEV_ATA)
5186 ata_start_drive(dev);
5192 * ata_device_suspend - prepare a device for suspend
5193 * @dev: the device to suspend
5194 * @state: target power management state
5196 * Flush the cache on the drive, if appropriate, then issue a
5197 * standbynow command.
5199 int ata_device_suspend(struct ata_device *dev, pm_message_t state)
5201 struct ata_port *ap = dev->ap;
5203 if (!ata_dev_enabled(dev))
5205 if (dev->class == ATA_DEV_ATA)
5206 ata_flush_cache(dev);
5208 if (state.event != PM_EVENT_FREEZE)
5209 ata_standby_drive(dev);
5210 ap->flags |= ATA_FLAG_SUSPENDED;
5215 * ata_port_start - Set port up for dma.
5216 * @ap: Port to initialize
5218 * Called just after data structures for each port are
5219 * initialized. Allocates space for PRD table.
5221 * May be used as the port_start() entry in ata_port_operations.
5224 * Inherited from caller.
5227 int ata_port_start (struct ata_port *ap)
5229 struct device *dev = ap->dev;
5232 ap->prd = dma_alloc_coherent(dev, ATA_PRD_TBL_SZ, &ap->prd_dma, GFP_KERNEL);
5236 rc = ata_pad_alloc(ap, dev);
5238 dma_free_coherent(dev, ATA_PRD_TBL_SZ, ap->prd, ap->prd_dma);
5242 DPRINTK("prd alloc, virt %p, dma %llx\n", ap->prd, (unsigned long long) ap->prd_dma);
5249 * ata_port_stop - Undo ata_port_start()
5250 * @ap: Port to shut down
5252 * Frees the PRD table.
5254 * May be used as the port_stop() entry in ata_port_operations.
5257 * Inherited from caller.
5260 void ata_port_stop (struct ata_port *ap)
5262 struct device *dev = ap->dev;
5264 dma_free_coherent(dev, ATA_PRD_TBL_SZ, ap->prd, ap->prd_dma);
5265 ata_pad_free(ap, dev);
5268 void ata_host_stop (struct ata_host_set *host_set)
5270 if (host_set->mmio_base)
5271 iounmap(host_set->mmio_base);
5276 * ata_host_remove - Unregister SCSI host structure with upper layers
5277 * @ap: Port to unregister
5278 * @do_unregister: 1 if we fully unregister, 0 to just stop the port
5281 * Inherited from caller.
5284 static void ata_host_remove(struct ata_port *ap, unsigned int do_unregister)
5286 struct Scsi_Host *sh = ap->host;
5291 scsi_remove_host(sh);
5293 ap->ops->port_stop(ap);
5297 * ata_dev_init - Initialize an ata_device structure
5298 * @dev: Device structure to initialize
5300 * Initialize @dev in preparation for probing.
5303 * Inherited from caller.
5305 void ata_dev_init(struct ata_device *dev)
5307 struct ata_port *ap = dev->ap;
5308 unsigned long flags;
5310 /* SATA spd limit is bound to the first device */
5311 ap->sata_spd_limit = ap->hw_sata_spd_limit;
5313 /* High bits of dev->flags are used to record warm plug
5314 * requests which occur asynchronously. Synchronize using
5317 spin_lock_irqsave(&ap->host_set->lock, flags);
5318 dev->flags &= ~ATA_DFLAG_INIT_MASK;
5319 spin_unlock_irqrestore(&ap->host_set->lock, flags);
5321 memset((void *)dev + ATA_DEVICE_CLEAR_OFFSET, 0,
5322 sizeof(*dev) - ATA_DEVICE_CLEAR_OFFSET);
5323 dev->pio_mask = UINT_MAX;
5324 dev->mwdma_mask = UINT_MAX;
5325 dev->udma_mask = UINT_MAX;
5329 * ata_host_init - Initialize an ata_port structure
5330 * @ap: Structure to initialize
5331 * @host: associated SCSI mid-layer structure
5332 * @host_set: Collection of hosts to which @ap belongs
5333 * @ent: Probe information provided by low-level driver
5334 * @port_no: Port number associated with this ata_port
5336 * Initialize a new ata_port structure, and its associated
5340 * Inherited from caller.
5342 static void ata_host_init(struct ata_port *ap, struct Scsi_Host *host,
5343 struct ata_host_set *host_set,
5344 const struct ata_probe_ent *ent, unsigned int port_no)
5350 host->max_channel = 1;
5351 host->unique_id = ata_unique_id++;
5352 host->max_cmd_len = 12;
5354 ap->flags = ATA_FLAG_DISABLED;
5355 ap->id = host->unique_id;
5357 ap->ctl = ATA_DEVCTL_OBS;
5358 ap->host_set = host_set;
5360 ap->port_no = port_no;
5362 ent->legacy_mode ? ent->hard_port_no : port_no;
5363 ap->pio_mask = ent->pio_mask;
5364 ap->mwdma_mask = ent->mwdma_mask;
5365 ap->udma_mask = ent->udma_mask;
5366 ap->flags |= ent->host_flags;
5367 ap->ops = ent->port_ops;
5368 ap->hw_sata_spd_limit = UINT_MAX;
5369 ap->active_tag = ATA_TAG_POISON;
5370 ap->last_ctl = 0xFF;
5371 ap->msg_enable = ATA_MSG_DRV;
5373 INIT_WORK(&ap->port_task, NULL, NULL);
5374 INIT_LIST_HEAD(&ap->eh_done_q);
5375 init_waitqueue_head(&ap->eh_wait_q);
5377 /* set cable type */
5378 ap->cbl = ATA_CBL_NONE;
5379 if (ap->flags & ATA_FLAG_SATA)
5380 ap->cbl = ATA_CBL_SATA;
5382 for (i = 0; i < ATA_MAX_DEVICES; i++) {
5383 struct ata_device *dev = &ap->device[i];
5390 ap->stats.unhandled_irq = 1;
5391 ap->stats.idle_irq = 1;
5394 memcpy(&ap->ioaddr, &ent->port[port_no], sizeof(struct ata_ioports));
5398 * ata_host_add - Attach low-level ATA driver to system
5399 * @ent: Information provided by low-level driver
5400 * @host_set: Collections of ports to which we add
5401 * @port_no: Port number associated with this host
5403 * Attach low-level ATA driver to system.
5406 * PCI/etc. bus probe sem.
5409 * New ata_port on success, for NULL on error.
5412 static struct ata_port * ata_host_add(const struct ata_probe_ent *ent,
5413 struct ata_host_set *host_set,
5414 unsigned int port_no)
5416 struct Scsi_Host *host;
5417 struct ata_port *ap;
5422 if (!ent->port_ops->probe_reset &&
5423 !(ent->host_flags & (ATA_FLAG_SATA_RESET | ATA_FLAG_SRST))) {
5424 printk(KERN_ERR "ata%u: no reset mechanism available\n",
5429 host = scsi_host_alloc(ent->sht, sizeof(struct ata_port));
5433 host->transportt = &ata_scsi_transport_template;
5435 ap = ata_shost_to_port(host);
5437 ata_host_init(ap, host, host_set, ent, port_no);
5439 rc = ap->ops->port_start(ap);
5446 scsi_host_put(host);
5451 * ata_device_add - Register hardware device with ATA and SCSI layers
5452 * @ent: Probe information describing hardware device to be registered
5454 * This function processes the information provided in the probe
5455 * information struct @ent, allocates the necessary ATA and SCSI
5456 * host information structures, initializes them, and registers
5457 * everything with requisite kernel subsystems.
5459 * This function requests irqs, probes the ATA bus, and probes
5463 * PCI/etc. bus probe sem.
5466 * Number of ports registered. Zero on error (no ports registered).
5469 int ata_device_add(const struct ata_probe_ent *ent)
5471 unsigned int count = 0, i;
5472 struct device *dev = ent->dev;
5473 struct ata_host_set *host_set;
5476 /* alloc a container for our list of ATA ports (buses) */
5477 host_set = kzalloc(sizeof(struct ata_host_set) +
5478 (ent->n_ports * sizeof(void *)), GFP_KERNEL);
5481 spin_lock_init(&host_set->lock);
5483 host_set->dev = dev;
5484 host_set->n_ports = ent->n_ports;
5485 host_set->irq = ent->irq;
5486 host_set->mmio_base = ent->mmio_base;
5487 host_set->private_data = ent->private_data;
5488 host_set->ops = ent->port_ops;
5489 host_set->flags = ent->host_set_flags;
5491 /* register each port bound to this device */
5492 for (i = 0; i < ent->n_ports; i++) {
5493 struct ata_port *ap;
5494 unsigned long xfer_mode_mask;
5496 ap = ata_host_add(ent, host_set, i);
5500 host_set->ports[i] = ap;
5501 xfer_mode_mask =(ap->udma_mask << ATA_SHIFT_UDMA) |
5502 (ap->mwdma_mask << ATA_SHIFT_MWDMA) |
5503 (ap->pio_mask << ATA_SHIFT_PIO);
5505 /* print per-port info to dmesg */
5506 ata_port_printk(ap, KERN_INFO, "%cATA max %s cmd 0x%lX "
5507 "ctl 0x%lX bmdma 0x%lX irq %lu\n",
5508 ap->flags & ATA_FLAG_SATA ? 'S' : 'P',
5509 ata_mode_string(xfer_mode_mask),
5510 ap->ioaddr.cmd_addr,
5511 ap->ioaddr.ctl_addr,
5512 ap->ioaddr.bmdma_addr,
5516 host_set->ops->irq_clear(ap);
5517 ata_eh_freeze_port(ap); /* freeze port before requesting IRQ */
5524 /* obtain irq, that is shared between channels */
5525 if (request_irq(ent->irq, ent->port_ops->irq_handler, ent->irq_flags,
5526 DRV_NAME, host_set))
5529 /* perform each probe synchronously */
5530 DPRINTK("probe begin\n");
5531 for (i = 0; i < count; i++) {
5532 struct ata_port *ap;
5536 ap = host_set->ports[i];
5538 /* init sata_spd_limit to the current value */
5539 if (sata_scr_read(ap, SCR_CONTROL, &scontrol) == 0) {
5540 int spd = (scontrol >> 4) & 0xf;
5541 ap->hw_sata_spd_limit &= (1 << spd) - 1;
5543 ap->sata_spd_limit = ap->hw_sata_spd_limit;
5545 DPRINTK("ata%u: bus probe begin\n", ap->id);
5546 rc = ata_bus_probe(ap);
5547 DPRINTK("ata%u: bus probe end\n", ap->id);
5550 /* FIXME: do something useful here?
5551 * Current libata behavior will
5552 * tear down everything when
5553 * the module is removed
5554 * or the h/w is unplugged.
5558 rc = scsi_add_host(ap->host, dev);
5560 ata_port_printk(ap, KERN_ERR, "scsi_add_host failed\n");
5561 /* FIXME: do something useful here */
5562 /* FIXME: handle unconditional calls to
5563 * scsi_scan_host and ata_host_remove, below,
5569 /* probes are done, now scan each port's disk(s) */
5570 DPRINTK("host probe begin\n");
5571 for (i = 0; i < count; i++) {
5572 struct ata_port *ap = host_set->ports[i];
5574 ata_scsi_scan_host(ap);
5577 dev_set_drvdata(dev, host_set);
5579 VPRINTK("EXIT, returning %u\n", ent->n_ports);
5580 return ent->n_ports; /* success */
5583 for (i = 0; i < count; i++) {
5584 ata_host_remove(host_set->ports[i], 1);
5585 scsi_host_put(host_set->ports[i]->host);
5589 VPRINTK("EXIT, returning 0\n");
5594 * ata_host_set_remove - PCI layer callback for device removal
5595 * @host_set: ATA host set that was removed
5597 * Unregister all objects associated with this host set. Free those
5601 * Inherited from calling layer (may sleep).
5604 void ata_host_set_remove(struct ata_host_set *host_set)
5606 struct ata_port *ap;
5609 for (i = 0; i < host_set->n_ports; i++) {
5610 ap = host_set->ports[i];
5611 scsi_remove_host(ap->host);
5614 free_irq(host_set->irq, host_set);
5616 for (i = 0; i < host_set->n_ports; i++) {
5617 ap = host_set->ports[i];
5619 ata_scsi_release(ap->host);
5621 if ((ap->flags & ATA_FLAG_NO_LEGACY) == 0) {
5622 struct ata_ioports *ioaddr = &ap->ioaddr;
5624 if (ioaddr->cmd_addr == 0x1f0)
5625 release_region(0x1f0, 8);
5626 else if (ioaddr->cmd_addr == 0x170)
5627 release_region(0x170, 8);
5630 scsi_host_put(ap->host);
5633 if (host_set->ops->host_stop)
5634 host_set->ops->host_stop(host_set);
5640 * ata_scsi_release - SCSI layer callback hook for host unload
5641 * @host: libata host to be unloaded
5643 * Performs all duties necessary to shut down a libata port...
5644 * Kill port kthread, disable port, and release resources.
5647 * Inherited from SCSI layer.
5653 int ata_scsi_release(struct Scsi_Host *host)
5655 struct ata_port *ap = ata_shost_to_port(host);
5659 ap->ops->port_disable(ap);
5660 ata_host_remove(ap, 0);
5667 * ata_std_ports - initialize ioaddr with standard port offsets.
5668 * @ioaddr: IO address structure to be initialized
5670 * Utility function which initializes data_addr, error_addr,
5671 * feature_addr, nsect_addr, lbal_addr, lbam_addr, lbah_addr,
5672 * device_addr, status_addr, and command_addr to standard offsets
5673 * relative to cmd_addr.
5675 * Does not set ctl_addr, altstatus_addr, bmdma_addr, or scr_addr.
5678 void ata_std_ports(struct ata_ioports *ioaddr)
5680 ioaddr->data_addr = ioaddr->cmd_addr + ATA_REG_DATA;
5681 ioaddr->error_addr = ioaddr->cmd_addr + ATA_REG_ERR;
5682 ioaddr->feature_addr = ioaddr->cmd_addr + ATA_REG_FEATURE;
5683 ioaddr->nsect_addr = ioaddr->cmd_addr + ATA_REG_NSECT;
5684 ioaddr->lbal_addr = ioaddr->cmd_addr + ATA_REG_LBAL;
5685 ioaddr->lbam_addr = ioaddr->cmd_addr + ATA_REG_LBAM;
5686 ioaddr->lbah_addr = ioaddr->cmd_addr + ATA_REG_LBAH;
5687 ioaddr->device_addr = ioaddr->cmd_addr + ATA_REG_DEVICE;
5688 ioaddr->status_addr = ioaddr->cmd_addr + ATA_REG_STATUS;
5689 ioaddr->command_addr = ioaddr->cmd_addr + ATA_REG_CMD;
5695 void ata_pci_host_stop (struct ata_host_set *host_set)
5697 struct pci_dev *pdev = to_pci_dev(host_set->dev);
5699 pci_iounmap(pdev, host_set->mmio_base);
5703 * ata_pci_remove_one - PCI layer callback for device removal
5704 * @pdev: PCI device that was removed
5706 * PCI layer indicates to libata via this hook that
5707 * hot-unplug or module unload event has occurred.
5708 * Handle this by unregistering all objects associated
5709 * with this PCI device. Free those objects. Then finally
5710 * release PCI resources and disable device.
5713 * Inherited from PCI layer (may sleep).
5716 void ata_pci_remove_one (struct pci_dev *pdev)
5718 struct device *dev = pci_dev_to_dev(pdev);
5719 struct ata_host_set *host_set = dev_get_drvdata(dev);
5721 ata_host_set_remove(host_set);
5722 pci_release_regions(pdev);
5723 pci_disable_device(pdev);
5724 dev_set_drvdata(dev, NULL);
5727 /* move to PCI subsystem */
5728 int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits)
5730 unsigned long tmp = 0;
5732 switch (bits->width) {
5735 pci_read_config_byte(pdev, bits->reg, &tmp8);
5741 pci_read_config_word(pdev, bits->reg, &tmp16);
5747 pci_read_config_dword(pdev, bits->reg, &tmp32);
5758 return (tmp == bits->val) ? 1 : 0;
5761 int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t state)
5763 pci_save_state(pdev);
5764 pci_disable_device(pdev);
5765 pci_set_power_state(pdev, PCI_D3hot);
5769 int ata_pci_device_resume(struct pci_dev *pdev)
5771 pci_set_power_state(pdev, PCI_D0);
5772 pci_restore_state(pdev);
5773 pci_enable_device(pdev);
5774 pci_set_master(pdev);
5777 #endif /* CONFIG_PCI */
5780 static int __init ata_init(void)
5782 ata_wq = create_workqueue("ata");
5786 ata_aux_wq = create_singlethread_workqueue("ata_aux");
5788 destroy_workqueue(ata_wq);
5792 printk(KERN_DEBUG "libata version " DRV_VERSION " loaded.\n");
5796 static void __exit ata_exit(void)
5798 destroy_workqueue(ata_wq);
5799 destroy_workqueue(ata_aux_wq);
5802 module_init(ata_init);
5803 module_exit(ata_exit);
5805 static unsigned long ratelimit_time;
5806 static spinlock_t ata_ratelimit_lock = SPIN_LOCK_UNLOCKED;
5808 int ata_ratelimit(void)
5811 unsigned long flags;
5813 spin_lock_irqsave(&ata_ratelimit_lock, flags);
5815 if (time_after(jiffies, ratelimit_time)) {
5817 ratelimit_time = jiffies + (HZ/5);
5821 spin_unlock_irqrestore(&ata_ratelimit_lock, flags);
5827 * ata_wait_register - wait until register value changes
5828 * @reg: IO-mapped register
5829 * @mask: Mask to apply to read register value
5830 * @val: Wait condition
5831 * @interval_msec: polling interval in milliseconds
5832 * @timeout_msec: timeout in milliseconds
5834 * Waiting for some bits of register to change is a common
5835 * operation for ATA controllers. This function reads 32bit LE
5836 * IO-mapped register @reg and tests for the following condition.
5838 * (*@reg & mask) != val
5840 * If the condition is met, it returns; otherwise, the process is
5841 * repeated after @interval_msec until timeout.
5844 * Kernel thread context (may sleep)
5847 * The final register value.
5849 u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val,
5850 unsigned long interval_msec,
5851 unsigned long timeout_msec)
5853 unsigned long timeout;
5856 tmp = ioread32(reg);
5858 /* Calculate timeout _after_ the first read to make sure
5859 * preceding writes reach the controller before starting to
5860 * eat away the timeout.
5862 timeout = jiffies + (timeout_msec * HZ) / 1000;
5864 while ((tmp & mask) == val && time_before(jiffies, timeout)) {
5865 msleep(interval_msec);
5866 tmp = ioread32(reg);
5873 * libata is essentially a library of internal helper functions for
5874 * low-level ATA host controller drivers. As such, the API/ABI is
5875 * likely to change as new drivers are added and updated.
5876 * Do not depend on ABI/API stability.
5879 EXPORT_SYMBOL_GPL(sata_deb_timing_boot);
5880 EXPORT_SYMBOL_GPL(sata_deb_timing_eh);
5881 EXPORT_SYMBOL_GPL(sata_deb_timing_before_fsrst);
5882 EXPORT_SYMBOL_GPL(ata_std_bios_param);
5883 EXPORT_SYMBOL_GPL(ata_std_ports);
5884 EXPORT_SYMBOL_GPL(ata_device_add);
5885 EXPORT_SYMBOL_GPL(ata_host_set_remove);
5886 EXPORT_SYMBOL_GPL(ata_sg_init);
5887 EXPORT_SYMBOL_GPL(ata_sg_init_one);
5888 EXPORT_SYMBOL_GPL(ata_qc_complete);
5889 EXPORT_SYMBOL_GPL(ata_qc_complete_multiple);
5890 EXPORT_SYMBOL_GPL(ata_qc_issue_prot);
5891 EXPORT_SYMBOL_GPL(ata_tf_load);
5892 EXPORT_SYMBOL_GPL(ata_tf_read);
5893 EXPORT_SYMBOL_GPL(ata_noop_dev_select);
5894 EXPORT_SYMBOL_GPL(ata_std_dev_select);
5895 EXPORT_SYMBOL_GPL(ata_tf_to_fis);
5896 EXPORT_SYMBOL_GPL(ata_tf_from_fis);
5897 EXPORT_SYMBOL_GPL(ata_check_status);
5898 EXPORT_SYMBOL_GPL(ata_altstatus);
5899 EXPORT_SYMBOL_GPL(ata_exec_command);
5900 EXPORT_SYMBOL_GPL(ata_port_start);
5901 EXPORT_SYMBOL_GPL(ata_port_stop);
5902 EXPORT_SYMBOL_GPL(ata_host_stop);
5903 EXPORT_SYMBOL_GPL(ata_interrupt);
5904 EXPORT_SYMBOL_GPL(ata_mmio_data_xfer);
5905 EXPORT_SYMBOL_GPL(ata_pio_data_xfer);
5906 EXPORT_SYMBOL_GPL(ata_pio_data_xfer_noirq);
5907 EXPORT_SYMBOL_GPL(ata_qc_prep);
5908 EXPORT_SYMBOL_GPL(ata_noop_qc_prep);
5909 EXPORT_SYMBOL_GPL(ata_bmdma_setup);
5910 EXPORT_SYMBOL_GPL(ata_bmdma_start);
5911 EXPORT_SYMBOL_GPL(ata_bmdma_irq_clear);
5912 EXPORT_SYMBOL_GPL(ata_bmdma_status);
5913 EXPORT_SYMBOL_GPL(ata_bmdma_stop);
5914 EXPORT_SYMBOL_GPL(ata_bmdma_freeze);
5915 EXPORT_SYMBOL_GPL(ata_bmdma_thaw);
5916 EXPORT_SYMBOL_GPL(ata_bmdma_drive_eh);
5917 EXPORT_SYMBOL_GPL(ata_bmdma_error_handler);
5918 EXPORT_SYMBOL_GPL(ata_bmdma_post_internal_cmd);
5919 EXPORT_SYMBOL_GPL(ata_port_probe);
5920 EXPORT_SYMBOL_GPL(sata_set_spd);
5921 EXPORT_SYMBOL_GPL(sata_phy_debounce);
5922 EXPORT_SYMBOL_GPL(sata_phy_resume);
5923 EXPORT_SYMBOL_GPL(sata_phy_reset);
5924 EXPORT_SYMBOL_GPL(__sata_phy_reset);
5925 EXPORT_SYMBOL_GPL(ata_bus_reset);
5926 EXPORT_SYMBOL_GPL(ata_std_probeinit);
5927 EXPORT_SYMBOL_GPL(ata_std_prereset);
5928 EXPORT_SYMBOL_GPL(ata_std_softreset);
5929 EXPORT_SYMBOL_GPL(sata_std_hardreset);
5930 EXPORT_SYMBOL_GPL(ata_std_postreset);
5931 EXPORT_SYMBOL_GPL(ata_std_probe_reset);
5932 EXPORT_SYMBOL_GPL(ata_drive_probe_reset);
5933 EXPORT_SYMBOL_GPL(ata_dev_revalidate);
5934 EXPORT_SYMBOL_GPL(ata_dev_classify);
5935 EXPORT_SYMBOL_GPL(ata_dev_pair);
5936 EXPORT_SYMBOL_GPL(ata_port_disable);
5937 EXPORT_SYMBOL_GPL(ata_ratelimit);
5938 EXPORT_SYMBOL_GPL(ata_wait_register);
5939 EXPORT_SYMBOL_GPL(ata_busy_sleep);
5940 EXPORT_SYMBOL_GPL(ata_port_queue_task);
5941 EXPORT_SYMBOL_GPL(ata_scsi_ioctl);
5942 EXPORT_SYMBOL_GPL(ata_scsi_queuecmd);
5943 EXPORT_SYMBOL_GPL(ata_scsi_slave_config);
5944 EXPORT_SYMBOL_GPL(ata_scsi_change_queue_depth);
5945 EXPORT_SYMBOL_GPL(ata_scsi_release);
5946 EXPORT_SYMBOL_GPL(ata_host_intr);
5947 EXPORT_SYMBOL_GPL(sata_scr_valid);
5948 EXPORT_SYMBOL_GPL(sata_scr_read);
5949 EXPORT_SYMBOL_GPL(sata_scr_write);
5950 EXPORT_SYMBOL_GPL(sata_scr_write_flush);
5951 EXPORT_SYMBOL_GPL(ata_port_online);
5952 EXPORT_SYMBOL_GPL(ata_port_offline);
5953 EXPORT_SYMBOL_GPL(ata_id_string);
5954 EXPORT_SYMBOL_GPL(ata_id_c_string);
5955 EXPORT_SYMBOL_GPL(ata_scsi_simulate);
5957 EXPORT_SYMBOL_GPL(ata_pio_need_iordy);
5958 EXPORT_SYMBOL_GPL(ata_timing_compute);
5959 EXPORT_SYMBOL_GPL(ata_timing_merge);
5962 EXPORT_SYMBOL_GPL(pci_test_config_bits);
5963 EXPORT_SYMBOL_GPL(ata_pci_host_stop);
5964 EXPORT_SYMBOL_GPL(ata_pci_init_native_mode);
5965 EXPORT_SYMBOL_GPL(ata_pci_init_one);
5966 EXPORT_SYMBOL_GPL(ata_pci_remove_one);
5967 EXPORT_SYMBOL_GPL(ata_pci_device_suspend);
5968 EXPORT_SYMBOL_GPL(ata_pci_device_resume);
5969 EXPORT_SYMBOL_GPL(ata_pci_default_filter);
5970 EXPORT_SYMBOL_GPL(ata_pci_clear_simplex);
5971 #endif /* CONFIG_PCI */
5973 EXPORT_SYMBOL_GPL(ata_device_suspend);
5974 EXPORT_SYMBOL_GPL(ata_device_resume);
5975 EXPORT_SYMBOL_GPL(ata_scsi_device_suspend);
5976 EXPORT_SYMBOL_GPL(ata_scsi_device_resume);
5978 EXPORT_SYMBOL_GPL(ata_eng_timeout);
5979 EXPORT_SYMBOL_GPL(ata_port_schedule_eh);
5980 EXPORT_SYMBOL_GPL(ata_port_abort);
5981 EXPORT_SYMBOL_GPL(ata_port_freeze);
5982 EXPORT_SYMBOL_GPL(ata_eh_freeze_port);
5983 EXPORT_SYMBOL_GPL(ata_eh_thaw_port);
5984 EXPORT_SYMBOL_GPL(ata_eh_qc_complete);
5985 EXPORT_SYMBOL_GPL(ata_eh_qc_retry);
5986 EXPORT_SYMBOL_GPL(ata_do_eh);