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 static unsigned int ata_dev_init_params(struct ata_device *dev,
65 u16 heads, u16 sectors);
66 static unsigned int ata_dev_set_xfermode(struct ata_device *dev);
67 static void ata_dev_xfermask(struct ata_device *dev);
69 static unsigned int ata_unique_id = 1;
70 static struct workqueue_struct *ata_wq;
72 int atapi_enabled = 1;
73 module_param(atapi_enabled, int, 0444);
74 MODULE_PARM_DESC(atapi_enabled, "Enable discovery of ATAPI devices (0=off, 1=on)");
77 module_param(atapi_dmadir, int, 0444);
78 MODULE_PARM_DESC(atapi_dmadir, "Enable ATAPI DMADIR bridge support (0=off, 1=on)");
81 module_param_named(fua, libata_fua, int, 0444);
82 MODULE_PARM_DESC(fua, "FUA support (0=off, 1=on)");
84 MODULE_AUTHOR("Jeff Garzik");
85 MODULE_DESCRIPTION("Library module for ATA devices");
86 MODULE_LICENSE("GPL");
87 MODULE_VERSION(DRV_VERSION);
91 * ata_tf_to_fis - Convert ATA taskfile to SATA FIS structure
92 * @tf: Taskfile to convert
93 * @fis: Buffer into which data will output
94 * @pmp: Port multiplier port
96 * Converts a standard ATA taskfile to a Serial ATA
97 * FIS structure (Register - Host to Device).
100 * Inherited from caller.
103 void ata_tf_to_fis(const struct ata_taskfile *tf, u8 *fis, u8 pmp)
105 fis[0] = 0x27; /* Register - Host to Device FIS */
106 fis[1] = (pmp & 0xf) | (1 << 7); /* Port multiplier number,
107 bit 7 indicates Command FIS */
108 fis[2] = tf->command;
109 fis[3] = tf->feature;
116 fis[8] = tf->hob_lbal;
117 fis[9] = tf->hob_lbam;
118 fis[10] = tf->hob_lbah;
119 fis[11] = tf->hob_feature;
122 fis[13] = tf->hob_nsect;
133 * ata_tf_from_fis - Convert SATA FIS to ATA taskfile
134 * @fis: Buffer from which data will be input
135 * @tf: Taskfile to output
137 * Converts a serial ATA FIS structure to a standard ATA taskfile.
140 * Inherited from caller.
143 void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf)
145 tf->command = fis[2]; /* status */
146 tf->feature = fis[3]; /* error */
153 tf->hob_lbal = fis[8];
154 tf->hob_lbam = fis[9];
155 tf->hob_lbah = fis[10];
158 tf->hob_nsect = fis[13];
161 static const u8 ata_rw_cmds[] = {
165 ATA_CMD_READ_MULTI_EXT,
166 ATA_CMD_WRITE_MULTI_EXT,
170 ATA_CMD_WRITE_MULTI_FUA_EXT,
174 ATA_CMD_PIO_READ_EXT,
175 ATA_CMD_PIO_WRITE_EXT,
188 ATA_CMD_WRITE_FUA_EXT
192 * ata_rwcmd_protocol - set taskfile r/w commands and protocol
193 * @qc: command to examine and configure
195 * Examine the device configuration and tf->flags to calculate
196 * the proper read/write commands and protocol to use.
201 int ata_rwcmd_protocol(struct ata_queued_cmd *qc)
203 struct ata_taskfile *tf = &qc->tf;
204 struct ata_device *dev = qc->dev;
207 int index, fua, lba48, write;
209 fua = (tf->flags & ATA_TFLAG_FUA) ? 4 : 0;
210 lba48 = (tf->flags & ATA_TFLAG_LBA48) ? 2 : 0;
211 write = (tf->flags & ATA_TFLAG_WRITE) ? 1 : 0;
213 if (dev->flags & ATA_DFLAG_PIO) {
214 tf->protocol = ATA_PROT_PIO;
215 index = dev->multi_count ? 0 : 8;
216 } else if (lba48 && (qc->ap->flags & ATA_FLAG_PIO_LBA48)) {
217 /* Unable to use DMA due to host limitation */
218 tf->protocol = ATA_PROT_PIO;
219 index = dev->multi_count ? 0 : 8;
221 tf->protocol = ATA_PROT_DMA;
225 cmd = ata_rw_cmds[index + fua + lba48 + write];
234 * ata_pack_xfermask - Pack pio, mwdma and udma masks into xfer_mask
235 * @pio_mask: pio_mask
236 * @mwdma_mask: mwdma_mask
237 * @udma_mask: udma_mask
239 * Pack @pio_mask, @mwdma_mask and @udma_mask into a single
240 * unsigned int xfer_mask.
248 static unsigned int ata_pack_xfermask(unsigned int pio_mask,
249 unsigned int mwdma_mask,
250 unsigned int udma_mask)
252 return ((pio_mask << ATA_SHIFT_PIO) & ATA_MASK_PIO) |
253 ((mwdma_mask << ATA_SHIFT_MWDMA) & ATA_MASK_MWDMA) |
254 ((udma_mask << ATA_SHIFT_UDMA) & ATA_MASK_UDMA);
258 * ata_unpack_xfermask - Unpack xfer_mask into pio, mwdma and udma masks
259 * @xfer_mask: xfer_mask to unpack
260 * @pio_mask: resulting pio_mask
261 * @mwdma_mask: resulting mwdma_mask
262 * @udma_mask: resulting udma_mask
264 * Unpack @xfer_mask into @pio_mask, @mwdma_mask and @udma_mask.
265 * Any NULL distination masks will be ignored.
267 static void ata_unpack_xfermask(unsigned int xfer_mask,
268 unsigned int *pio_mask,
269 unsigned int *mwdma_mask,
270 unsigned int *udma_mask)
273 *pio_mask = (xfer_mask & ATA_MASK_PIO) >> ATA_SHIFT_PIO;
275 *mwdma_mask = (xfer_mask & ATA_MASK_MWDMA) >> ATA_SHIFT_MWDMA;
277 *udma_mask = (xfer_mask & ATA_MASK_UDMA) >> ATA_SHIFT_UDMA;
280 static const struct ata_xfer_ent {
284 { ATA_SHIFT_PIO, ATA_BITS_PIO, XFER_PIO_0 },
285 { ATA_SHIFT_MWDMA, ATA_BITS_MWDMA, XFER_MW_DMA_0 },
286 { ATA_SHIFT_UDMA, ATA_BITS_UDMA, XFER_UDMA_0 },
291 * ata_xfer_mask2mode - Find matching XFER_* for the given xfer_mask
292 * @xfer_mask: xfer_mask of interest
294 * Return matching XFER_* value for @xfer_mask. Only the highest
295 * bit of @xfer_mask is considered.
301 * Matching XFER_* value, 0 if no match found.
303 static u8 ata_xfer_mask2mode(unsigned int xfer_mask)
305 int highbit = fls(xfer_mask) - 1;
306 const struct ata_xfer_ent *ent;
308 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
309 if (highbit >= ent->shift && highbit < ent->shift + ent->bits)
310 return ent->base + highbit - ent->shift;
315 * ata_xfer_mode2mask - Find matching xfer_mask for XFER_*
316 * @xfer_mode: XFER_* of interest
318 * Return matching xfer_mask for @xfer_mode.
324 * Matching xfer_mask, 0 if no match found.
326 static unsigned int ata_xfer_mode2mask(u8 xfer_mode)
328 const struct ata_xfer_ent *ent;
330 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
331 if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits)
332 return 1 << (ent->shift + xfer_mode - ent->base);
337 * ata_xfer_mode2shift - Find matching xfer_shift for XFER_*
338 * @xfer_mode: XFER_* of interest
340 * Return matching xfer_shift for @xfer_mode.
346 * Matching xfer_shift, -1 if no match found.
348 static int ata_xfer_mode2shift(unsigned int xfer_mode)
350 const struct ata_xfer_ent *ent;
352 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
353 if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits)
359 * ata_mode_string - convert xfer_mask to string
360 * @xfer_mask: mask of bits supported; only highest bit counts.
362 * Determine string which represents the highest speed
363 * (highest bit in @modemask).
369 * Constant C string representing highest speed listed in
370 * @mode_mask, or the constant C string "<n/a>".
372 static const char *ata_mode_string(unsigned int xfer_mask)
374 static const char * const xfer_mode_str[] = {
394 highbit = fls(xfer_mask) - 1;
395 if (highbit >= 0 && highbit < ARRAY_SIZE(xfer_mode_str))
396 return xfer_mode_str[highbit];
400 static const char *sata_spd_string(unsigned int spd)
402 static const char * const spd_str[] = {
407 if (spd == 0 || (spd - 1) >= ARRAY_SIZE(spd_str))
409 return spd_str[spd - 1];
412 void ata_dev_disable(struct ata_device *dev)
414 if (ata_dev_enabled(dev)) {
415 printk(KERN_WARNING "ata%u: dev %u disabled\n",
416 dev->ap->id, dev->devno);
422 * ata_pio_devchk - PATA device presence detection
423 * @ap: ATA channel to examine
424 * @device: Device to examine (starting at zero)
426 * This technique was originally described in
427 * Hale Landis's ATADRVR (www.ata-atapi.com), and
428 * later found its way into the ATA/ATAPI spec.
430 * Write a pattern to the ATA shadow registers,
431 * and if a device is present, it will respond by
432 * correctly storing and echoing back the
433 * ATA shadow register contents.
439 static unsigned int ata_pio_devchk(struct ata_port *ap,
442 struct ata_ioports *ioaddr = &ap->ioaddr;
445 ap->ops->dev_select(ap, device);
447 outb(0x55, ioaddr->nsect_addr);
448 outb(0xaa, ioaddr->lbal_addr);
450 outb(0xaa, ioaddr->nsect_addr);
451 outb(0x55, ioaddr->lbal_addr);
453 outb(0x55, ioaddr->nsect_addr);
454 outb(0xaa, ioaddr->lbal_addr);
456 nsect = inb(ioaddr->nsect_addr);
457 lbal = inb(ioaddr->lbal_addr);
459 if ((nsect == 0x55) && (lbal == 0xaa))
460 return 1; /* we found a device */
462 return 0; /* nothing found */
466 * ata_mmio_devchk - PATA device presence detection
467 * @ap: ATA channel to examine
468 * @device: Device to examine (starting at zero)
470 * This technique was originally described in
471 * Hale Landis's ATADRVR (www.ata-atapi.com), and
472 * later found its way into the ATA/ATAPI spec.
474 * Write a pattern to the ATA shadow registers,
475 * and if a device is present, it will respond by
476 * correctly storing and echoing back the
477 * ATA shadow register contents.
483 static unsigned int ata_mmio_devchk(struct ata_port *ap,
486 struct ata_ioports *ioaddr = &ap->ioaddr;
489 ap->ops->dev_select(ap, device);
491 writeb(0x55, (void __iomem *) ioaddr->nsect_addr);
492 writeb(0xaa, (void __iomem *) ioaddr->lbal_addr);
494 writeb(0xaa, (void __iomem *) ioaddr->nsect_addr);
495 writeb(0x55, (void __iomem *) ioaddr->lbal_addr);
497 writeb(0x55, (void __iomem *) ioaddr->nsect_addr);
498 writeb(0xaa, (void __iomem *) ioaddr->lbal_addr);
500 nsect = readb((void __iomem *) ioaddr->nsect_addr);
501 lbal = readb((void __iomem *) ioaddr->lbal_addr);
503 if ((nsect == 0x55) && (lbal == 0xaa))
504 return 1; /* we found a device */
506 return 0; /* nothing found */
510 * ata_devchk - PATA device presence detection
511 * @ap: ATA channel to examine
512 * @device: Device to examine (starting at zero)
514 * Dispatch ATA device presence detection, depending
515 * on whether we are using PIO or MMIO to talk to the
516 * ATA shadow registers.
522 static unsigned int ata_devchk(struct ata_port *ap,
525 if (ap->flags & ATA_FLAG_MMIO)
526 return ata_mmio_devchk(ap, device);
527 return ata_pio_devchk(ap, device);
531 * ata_dev_classify - determine device type based on ATA-spec signature
532 * @tf: ATA taskfile register set for device to be identified
534 * Determine from taskfile register contents whether a device is
535 * ATA or ATAPI, as per "Signature and persistence" section
536 * of ATA/PI spec (volume 1, sect 5.14).
542 * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, or %ATA_DEV_UNKNOWN
543 * the event of failure.
546 unsigned int ata_dev_classify(const struct ata_taskfile *tf)
548 /* Apple's open source Darwin code hints that some devices only
549 * put a proper signature into the LBA mid/high registers,
550 * So, we only check those. It's sufficient for uniqueness.
553 if (((tf->lbam == 0) && (tf->lbah == 0)) ||
554 ((tf->lbam == 0x3c) && (tf->lbah == 0xc3))) {
555 DPRINTK("found ATA device by sig\n");
559 if (((tf->lbam == 0x14) && (tf->lbah == 0xeb)) ||
560 ((tf->lbam == 0x69) && (tf->lbah == 0x96))) {
561 DPRINTK("found ATAPI device by sig\n");
562 return ATA_DEV_ATAPI;
565 DPRINTK("unknown device\n");
566 return ATA_DEV_UNKNOWN;
570 * ata_dev_try_classify - Parse returned ATA device signature
571 * @ap: ATA channel to examine
572 * @device: Device to examine (starting at zero)
573 * @r_err: Value of error register on completion
575 * After an event -- SRST, E.D.D., or SATA COMRESET -- occurs,
576 * an ATA/ATAPI-defined set of values is placed in the ATA
577 * shadow registers, indicating the results of device detection
580 * Select the ATA device, and read the values from the ATA shadow
581 * registers. Then parse according to the Error register value,
582 * and the spec-defined values examined by ata_dev_classify().
588 * Device type - %ATA_DEV_ATA, %ATA_DEV_ATAPI or %ATA_DEV_NONE.
592 ata_dev_try_classify(struct ata_port *ap, unsigned int device, u8 *r_err)
594 struct ata_taskfile tf;
598 ap->ops->dev_select(ap, device);
600 memset(&tf, 0, sizeof(tf));
602 ap->ops->tf_read(ap, &tf);
607 /* see if device passed diags */
610 else if ((device == 0) && (err == 0x81))
615 /* determine if device is ATA or ATAPI */
616 class = ata_dev_classify(&tf);
618 if (class == ATA_DEV_UNKNOWN)
620 if ((class == ATA_DEV_ATA) && (ata_chk_status(ap) == 0))
626 * ata_id_string - Convert IDENTIFY DEVICE page into string
627 * @id: IDENTIFY DEVICE results we will examine
628 * @s: string into which data is output
629 * @ofs: offset into identify device page
630 * @len: length of string to return. must be an even number.
632 * The strings in the IDENTIFY DEVICE page are broken up into
633 * 16-bit chunks. Run through the string, and output each
634 * 8-bit chunk linearly, regardless of platform.
640 void ata_id_string(const u16 *id, unsigned char *s,
641 unsigned int ofs, unsigned int len)
660 * ata_id_c_string - Convert IDENTIFY DEVICE page into C string
661 * @id: IDENTIFY DEVICE results we will examine
662 * @s: string into which data is output
663 * @ofs: offset into identify device page
664 * @len: length of string to return. must be an odd number.
666 * This function is identical to ata_id_string except that it
667 * trims trailing spaces and terminates the resulting string with
668 * null. @len must be actual maximum length (even number) + 1.
673 void ata_id_c_string(const u16 *id, unsigned char *s,
674 unsigned int ofs, unsigned int len)
680 ata_id_string(id, s, ofs, len - 1);
682 p = s + strnlen(s, len - 1);
683 while (p > s && p[-1] == ' ')
688 static u64 ata_id_n_sectors(const u16 *id)
690 if (ata_id_has_lba(id)) {
691 if (ata_id_has_lba48(id))
692 return ata_id_u64(id, 100);
694 return ata_id_u32(id, 60);
696 if (ata_id_current_chs_valid(id))
697 return ata_id_u32(id, 57);
699 return id[1] * id[3] * id[6];
704 * ata_noop_dev_select - Select device 0/1 on ATA bus
705 * @ap: ATA channel to manipulate
706 * @device: ATA device (numbered from zero) to select
708 * This function performs no actual function.
710 * May be used as the dev_select() entry in ata_port_operations.
715 void ata_noop_dev_select (struct ata_port *ap, unsigned int device)
721 * ata_std_dev_select - Select device 0/1 on ATA bus
722 * @ap: ATA channel to manipulate
723 * @device: ATA device (numbered from zero) to select
725 * Use the method defined in the ATA specification to
726 * make either device 0, or device 1, active on the
727 * ATA channel. Works with both PIO and MMIO.
729 * May be used as the dev_select() entry in ata_port_operations.
735 void ata_std_dev_select (struct ata_port *ap, unsigned int device)
740 tmp = ATA_DEVICE_OBS;
742 tmp = ATA_DEVICE_OBS | ATA_DEV1;
744 if (ap->flags & ATA_FLAG_MMIO) {
745 writeb(tmp, (void __iomem *) ap->ioaddr.device_addr);
747 outb(tmp, ap->ioaddr.device_addr);
749 ata_pause(ap); /* needed; also flushes, for mmio */
753 * ata_dev_select - Select device 0/1 on ATA bus
754 * @ap: ATA channel to manipulate
755 * @device: ATA device (numbered from zero) to select
756 * @wait: non-zero to wait for Status register BSY bit to clear
757 * @can_sleep: non-zero if context allows sleeping
759 * Use the method defined in the ATA specification to
760 * make either device 0, or device 1, active on the
763 * This is a high-level version of ata_std_dev_select(),
764 * which additionally provides the services of inserting
765 * the proper pauses and status polling, where needed.
771 void ata_dev_select(struct ata_port *ap, unsigned int device,
772 unsigned int wait, unsigned int can_sleep)
774 VPRINTK("ENTER, ata%u: device %u, wait %u\n",
775 ap->id, device, wait);
780 ap->ops->dev_select(ap, device);
783 if (can_sleep && ap->device[device].class == ATA_DEV_ATAPI)
790 * ata_dump_id - IDENTIFY DEVICE info debugging output
791 * @id: IDENTIFY DEVICE page to dump
793 * Dump selected 16-bit words from the given IDENTIFY DEVICE
800 static inline void ata_dump_id(const u16 *id)
802 DPRINTK("49==0x%04x "
812 DPRINTK("80==0x%04x "
822 DPRINTK("88==0x%04x "
829 * ata_id_xfermask - Compute xfermask from the given IDENTIFY data
830 * @id: IDENTIFY data to compute xfer mask from
832 * Compute the xfermask for this device. This is not as trivial
833 * as it seems if we must consider early devices correctly.
835 * FIXME: pre IDE drive timing (do we care ?).
843 static unsigned int ata_id_xfermask(const u16 *id)
845 unsigned int pio_mask, mwdma_mask, udma_mask;
847 /* Usual case. Word 53 indicates word 64 is valid */
848 if (id[ATA_ID_FIELD_VALID] & (1 << 1)) {
849 pio_mask = id[ATA_ID_PIO_MODES] & 0x03;
853 /* If word 64 isn't valid then Word 51 high byte holds
854 * the PIO timing number for the maximum. Turn it into
857 pio_mask = (2 << (id[ATA_ID_OLD_PIO_MODES] & 0xFF)) - 1 ;
859 /* But wait.. there's more. Design your standards by
860 * committee and you too can get a free iordy field to
861 * process. However its the speeds not the modes that
862 * are supported... Note drivers using the timing API
863 * will get this right anyway
867 mwdma_mask = id[ATA_ID_MWDMA_MODES] & 0x07;
870 if (id[ATA_ID_FIELD_VALID] & (1 << 2))
871 udma_mask = id[ATA_ID_UDMA_MODES] & 0xff;
873 return ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask);
877 * ata_port_queue_task - Queue port_task
878 * @ap: The ata_port to queue port_task for
880 * Schedule @fn(@data) for execution after @delay jiffies using
881 * port_task. There is one port_task per port and it's the
882 * user(low level driver)'s responsibility to make sure that only
883 * one task is active at any given time.
885 * libata core layer takes care of synchronization between
886 * port_task and EH. ata_port_queue_task() may be ignored for EH
890 * Inherited from caller.
892 void ata_port_queue_task(struct ata_port *ap, void (*fn)(void *), void *data,
897 if (ap->flags & ATA_FLAG_FLUSH_PORT_TASK)
900 PREPARE_WORK(&ap->port_task, fn, data);
903 rc = queue_work(ata_wq, &ap->port_task);
905 rc = queue_delayed_work(ata_wq, &ap->port_task, delay);
907 /* rc == 0 means that another user is using port task */
912 * ata_port_flush_task - Flush port_task
913 * @ap: The ata_port to flush port_task for
915 * After this function completes, port_task is guranteed not to
916 * be running or scheduled.
919 * Kernel thread context (may sleep)
921 void ata_port_flush_task(struct ata_port *ap)
927 spin_lock_irqsave(&ap->host_set->lock, flags);
928 ap->flags |= ATA_FLAG_FLUSH_PORT_TASK;
929 spin_unlock_irqrestore(&ap->host_set->lock, flags);
931 DPRINTK("flush #1\n");
932 flush_workqueue(ata_wq);
935 * At this point, if a task is running, it's guaranteed to see
936 * the FLUSH flag; thus, it will never queue pio tasks again.
939 if (!cancel_delayed_work(&ap->port_task)) {
940 DPRINTK("flush #2\n");
941 flush_workqueue(ata_wq);
944 spin_lock_irqsave(&ap->host_set->lock, flags);
945 ap->flags &= ~ATA_FLAG_FLUSH_PORT_TASK;
946 spin_unlock_irqrestore(&ap->host_set->lock, flags);
951 void ata_qc_complete_internal(struct ata_queued_cmd *qc)
953 struct completion *waiting = qc->private_data;
959 * ata_exec_internal - execute libata internal command
960 * @dev: Device to which the command is sent
961 * @tf: Taskfile registers for the command and the result
962 * @cdb: CDB for packet command
963 * @dma_dir: Data tranfer direction of the command
964 * @buf: Data buffer of the command
965 * @buflen: Length of data buffer
967 * Executes libata internal command with timeout. @tf contains
968 * command on entry and result on return. Timeout and error
969 * conditions are reported via return value. No recovery action
970 * is taken after a command times out. It's caller's duty to
971 * clean up after timeout.
974 * None. Should be called with kernel context, might sleep.
977 unsigned ata_exec_internal(struct ata_device *dev,
978 struct ata_taskfile *tf, const u8 *cdb,
979 int dma_dir, void *buf, unsigned int buflen)
981 struct ata_port *ap = dev->ap;
982 u8 command = tf->command;
983 struct ata_queued_cmd *qc;
984 DECLARE_COMPLETION(wait);
986 unsigned int err_mask;
988 spin_lock_irqsave(&ap->host_set->lock, flags);
990 qc = ata_qc_new_init(dev);
995 memcpy(qc->cdb, cdb, ATAPI_CDB_LEN);
996 qc->flags |= ATA_QCFLAG_RESULT_TF;
997 qc->dma_dir = dma_dir;
998 if (dma_dir != DMA_NONE) {
999 ata_sg_init_one(qc, buf, buflen);
1000 qc->nsect = buflen / ATA_SECT_SIZE;
1003 qc->private_data = &wait;
1004 qc->complete_fn = ata_qc_complete_internal;
1008 spin_unlock_irqrestore(&ap->host_set->lock, flags);
1010 if (!wait_for_completion_timeout(&wait, ATA_TMOUT_INTERNAL)) {
1011 ata_port_flush_task(ap);
1013 spin_lock_irqsave(&ap->host_set->lock, flags);
1015 /* We're racing with irq here. If we lose, the
1016 * following test prevents us from completing the qc
1017 * again. If completion irq occurs after here but
1018 * before the caller cleans up, it will result in a
1019 * spurious interrupt. We can live with that.
1021 if (qc->flags & ATA_QCFLAG_ACTIVE) {
1022 qc->err_mask = AC_ERR_TIMEOUT;
1023 ata_qc_complete(qc);
1024 printk(KERN_WARNING "ata%u: qc timeout (cmd 0x%x)\n",
1028 spin_unlock_irqrestore(&ap->host_set->lock, flags);
1032 spin_lock_irqsave(&ap->host_set->lock, flags);
1034 *tf = qc->result_tf;
1035 err_mask = qc->err_mask;
1039 /* XXX - Some LLDDs (sata_mv) disable port on command failure.
1040 * Until those drivers are fixed, we detect the condition
1041 * here, fail the command with AC_ERR_SYSTEM and reenable the
1044 * Note that this doesn't change any behavior as internal
1045 * command failure results in disabling the device in the
1046 * higher layer for LLDDs without new reset/EH callbacks.
1048 * Kill the following code as soon as those drivers are fixed.
1050 if (ap->flags & ATA_FLAG_DISABLED) {
1051 err_mask |= AC_ERR_SYSTEM;
1055 spin_unlock_irqrestore(&ap->host_set->lock, flags);
1061 * ata_pio_need_iordy - check if iordy needed
1064 * Check if the current speed of the device requires IORDY. Used
1065 * by various controllers for chip configuration.
1068 unsigned int ata_pio_need_iordy(const struct ata_device *adev)
1071 int speed = adev->pio_mode - XFER_PIO_0;
1078 /* If we have no drive specific rule, then PIO 2 is non IORDY */
1080 if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE */
1081 pio = adev->id[ATA_ID_EIDE_PIO];
1082 /* Is the speed faster than the drive allows non IORDY ? */
1084 /* This is cycle times not frequency - watch the logic! */
1085 if (pio > 240) /* PIO2 is 240nS per cycle */
1094 * ata_dev_read_id - Read ID data from the specified device
1095 * @dev: target device
1096 * @p_class: pointer to class of the target device (may be changed)
1097 * @post_reset: is this read ID post-reset?
1098 * @id: buffer to read IDENTIFY data into
1100 * Read ID data from the specified device. ATA_CMD_ID_ATA is
1101 * performed on ATA devices and ATA_CMD_ID_ATAPI on ATAPI
1102 * devices. This function also issues ATA_CMD_INIT_DEV_PARAMS
1103 * for pre-ATA4 drives.
1106 * Kernel thread context (may sleep)
1109 * 0 on success, -errno otherwise.
1111 static int ata_dev_read_id(struct ata_device *dev, unsigned int *p_class,
1112 int post_reset, u16 *id)
1114 struct ata_port *ap = dev->ap;
1115 unsigned int class = *p_class;
1116 struct ata_taskfile tf;
1117 unsigned int err_mask = 0;
1121 DPRINTK("ENTER, host %u, dev %u\n", ap->id, dev->devno);
1123 ata_dev_select(ap, dev->devno, 1, 1); /* select device 0/1 */
1126 ata_tf_init(dev, &tf);
1130 tf.command = ATA_CMD_ID_ATA;
1133 tf.command = ATA_CMD_ID_ATAPI;
1137 reason = "unsupported class";
1141 tf.protocol = ATA_PROT_PIO;
1143 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_FROM_DEVICE,
1144 id, sizeof(id[0]) * ATA_ID_WORDS);
1147 reason = "I/O error";
1151 swap_buf_le16(id, ATA_ID_WORDS);
1154 if ((class == ATA_DEV_ATA) != (ata_id_is_ata(id) | ata_id_is_cfa(id))) {
1156 reason = "device reports illegal type";
1160 if (post_reset && class == ATA_DEV_ATA) {
1162 * The exact sequence expected by certain pre-ATA4 drives is:
1165 * INITIALIZE DEVICE PARAMETERS
1167 * Some drives were very specific about that exact sequence.
1169 if (ata_id_major_version(id) < 4 || !ata_id_has_lba(id)) {
1170 err_mask = ata_dev_init_params(dev, id[3], id[6]);
1173 reason = "INIT_DEV_PARAMS failed";
1177 /* current CHS translation info (id[53-58]) might be
1178 * changed. reread the identify device info.
1190 printk(KERN_WARNING "ata%u: dev %u failed to IDENTIFY (%s)\n",
1191 ap->id, dev->devno, reason);
1195 static inline u8 ata_dev_knobble(struct ata_device *dev)
1197 return ((dev->ap->cbl == ATA_CBL_SATA) && (!ata_id_is_sata(dev->id)));
1201 * ata_dev_configure - Configure the specified ATA/ATAPI device
1202 * @dev: Target device to configure
1203 * @print_info: Enable device info printout
1205 * Configure @dev according to @dev->id. Generic and low-level
1206 * driver specific fixups are also applied.
1209 * Kernel thread context (may sleep)
1212 * 0 on success, -errno otherwise
1214 static int ata_dev_configure(struct ata_device *dev, int print_info)
1216 struct ata_port *ap = dev->ap;
1217 const u16 *id = dev->id;
1218 unsigned int xfer_mask;
1221 if (!ata_dev_enabled(dev)) {
1222 DPRINTK("ENTER/EXIT (host %u, dev %u) -- nodev\n",
1223 ap->id, dev->devno);
1227 DPRINTK("ENTER, host %u, dev %u\n", ap->id, dev->devno);
1229 /* print device capabilities */
1231 printk(KERN_DEBUG "ata%u: dev %u cfg 49:%04x 82:%04x 83:%04x "
1232 "84:%04x 85:%04x 86:%04x 87:%04x 88:%04x\n",
1233 ap->id, dev->devno, id[49], id[82], id[83],
1234 id[84], id[85], id[86], id[87], id[88]);
1236 /* initialize to-be-configured parameters */
1237 dev->flags &= ~ATA_DFLAG_CFG_MASK;
1238 dev->max_sectors = 0;
1246 * common ATA, ATAPI feature tests
1249 /* find max transfer mode; for printk only */
1250 xfer_mask = ata_id_xfermask(id);
1254 /* ATA-specific feature tests */
1255 if (dev->class == ATA_DEV_ATA) {
1256 dev->n_sectors = ata_id_n_sectors(id);
1258 if (ata_id_has_lba(id)) {
1259 const char *lba_desc;
1262 dev->flags |= ATA_DFLAG_LBA;
1263 if (ata_id_has_lba48(id)) {
1264 dev->flags |= ATA_DFLAG_LBA48;
1268 /* print device info to dmesg */
1270 printk(KERN_INFO "ata%u: dev %u ATA-%d, "
1271 "max %s, %Lu sectors: %s\n",
1273 ata_id_major_version(id),
1274 ata_mode_string(xfer_mask),
1275 (unsigned long long)dev->n_sectors,
1280 /* Default translation */
1281 dev->cylinders = id[1];
1283 dev->sectors = id[6];
1285 if (ata_id_current_chs_valid(id)) {
1286 /* Current CHS translation is valid. */
1287 dev->cylinders = id[54];
1288 dev->heads = id[55];
1289 dev->sectors = id[56];
1292 /* print device info to dmesg */
1294 printk(KERN_INFO "ata%u: dev %u ATA-%d, "
1295 "max %s, %Lu sectors: CHS %u/%u/%u\n",
1297 ata_id_major_version(id),
1298 ata_mode_string(xfer_mask),
1299 (unsigned long long)dev->n_sectors,
1300 dev->cylinders, dev->heads, dev->sectors);
1306 /* ATAPI-specific feature tests */
1307 else if (dev->class == ATA_DEV_ATAPI) {
1308 rc = atapi_cdb_len(id);
1309 if ((rc < 12) || (rc > ATAPI_CDB_LEN)) {
1310 printk(KERN_WARNING "ata%u: unsupported CDB len\n", ap->id);
1314 dev->cdb_len = (unsigned int) rc;
1316 /* print device info to dmesg */
1318 printk(KERN_INFO "ata%u: dev %u ATAPI, max %s\n",
1319 ap->id, dev->devno, ata_mode_string(xfer_mask));
1322 ap->host->max_cmd_len = 0;
1323 for (i = 0; i < ATA_MAX_DEVICES; i++)
1324 ap->host->max_cmd_len = max_t(unsigned int,
1325 ap->host->max_cmd_len,
1326 ap->device[i].cdb_len);
1328 /* limit bridge transfers to udma5, 200 sectors */
1329 if (ata_dev_knobble(dev)) {
1331 printk(KERN_INFO "ata%u(%u): applying bridge limits\n",
1332 ap->id, dev->devno);
1333 dev->udma_mask &= ATA_UDMA5;
1334 dev->max_sectors = ATA_MAX_SECTORS;
1337 if (ap->ops->dev_config)
1338 ap->ops->dev_config(ap, dev);
1340 DPRINTK("EXIT, drv_stat = 0x%x\n", ata_chk_status(ap));
1344 DPRINTK("EXIT, err\n");
1349 * ata_bus_probe - Reset and probe ATA bus
1352 * Master ATA bus probing function. Initiates a hardware-dependent
1353 * bus reset, then attempts to identify any devices found on
1357 * PCI/etc. bus probe sem.
1360 * Zero on success, negative errno otherwise.
1363 static int ata_bus_probe(struct ata_port *ap)
1365 unsigned int classes[ATA_MAX_DEVICES];
1366 int tries[ATA_MAX_DEVICES];
1367 int i, rc, down_xfermask;
1368 struct ata_device *dev;
1372 for (i = 0; i < ATA_MAX_DEVICES; i++)
1373 tries[i] = ATA_PROBE_MAX_TRIES;
1378 /* reset and determine device classes */
1379 for (i = 0; i < ATA_MAX_DEVICES; i++)
1380 classes[i] = ATA_DEV_UNKNOWN;
1382 if (ap->ops->probe_reset) {
1383 rc = ap->ops->probe_reset(ap, classes);
1385 printk("ata%u: reset failed (errno=%d)\n", ap->id, rc);
1389 ap->ops->phy_reset(ap);
1391 for (i = 0; i < ATA_MAX_DEVICES; i++) {
1392 if (!(ap->flags & ATA_FLAG_DISABLED))
1393 classes[i] = ap->device[i].class;
1394 ap->device[i].class = ATA_DEV_UNKNOWN;
1400 for (i = 0; i < ATA_MAX_DEVICES; i++)
1401 if (classes[i] == ATA_DEV_UNKNOWN)
1402 classes[i] = ATA_DEV_NONE;
1404 /* read IDENTIFY page and configure devices */
1405 for (i = 0; i < ATA_MAX_DEVICES; i++) {
1406 dev = &ap->device[i];
1409 dev->class = classes[i];
1411 if (!ata_dev_enabled(dev))
1414 rc = ata_dev_read_id(dev, &dev->class, 1, dev->id);
1418 rc = ata_dev_configure(dev, 1);
1423 /* configure transfer mode */
1424 rc = ata_set_mode(ap, &dev);
1430 for (i = 0; i < ATA_MAX_DEVICES; i++)
1431 if (ata_dev_enabled(&ap->device[i]))
1434 /* no device present, disable port */
1435 ata_port_disable(ap);
1436 ap->ops->port_disable(ap);
1443 tries[dev->devno] = 0;
1446 sata_down_spd_limit(ap);
1449 tries[dev->devno]--;
1450 if (down_xfermask &&
1451 ata_down_xfermask_limit(dev, tries[dev->devno] == 1))
1452 tries[dev->devno] = 0;
1455 if (!tries[dev->devno]) {
1456 ata_down_xfermask_limit(dev, 1);
1457 ata_dev_disable(dev);
1464 * ata_port_probe - Mark port as enabled
1465 * @ap: Port for which we indicate enablement
1467 * Modify @ap data structure such that the system
1468 * thinks that the entire port is enabled.
1470 * LOCKING: host_set lock, or some other form of
1474 void ata_port_probe(struct ata_port *ap)
1476 ap->flags &= ~ATA_FLAG_DISABLED;
1480 * sata_print_link_status - Print SATA link status
1481 * @ap: SATA port to printk link status about
1483 * This function prints link speed and status of a SATA link.
1488 static void sata_print_link_status(struct ata_port *ap)
1490 u32 sstatus, scontrol, tmp;
1492 if (sata_scr_read(ap, SCR_STATUS, &sstatus))
1494 sata_scr_read(ap, SCR_CONTROL, &scontrol);
1496 if (ata_port_online(ap)) {
1497 tmp = (sstatus >> 4) & 0xf;
1499 "ata%u: SATA link up %s (SStatus %X SControl %X)\n",
1500 ap->id, sata_spd_string(tmp), sstatus, scontrol);
1503 "ata%u: SATA link down (SStatus %X SControl %X)\n",
1504 ap->id, sstatus, scontrol);
1509 * __sata_phy_reset - Wake/reset a low-level SATA PHY
1510 * @ap: SATA port associated with target SATA PHY.
1512 * This function issues commands to standard SATA Sxxx
1513 * PHY registers, to wake up the phy (and device), and
1514 * clear any reset condition.
1517 * PCI/etc. bus probe sem.
1520 void __sata_phy_reset(struct ata_port *ap)
1523 unsigned long timeout = jiffies + (HZ * 5);
1525 if (ap->flags & ATA_FLAG_SATA_RESET) {
1526 /* issue phy wake/reset */
1527 sata_scr_write_flush(ap, SCR_CONTROL, 0x301);
1528 /* Couldn't find anything in SATA I/II specs, but
1529 * AHCI-1.1 10.4.2 says at least 1 ms. */
1532 /* phy wake/clear reset */
1533 sata_scr_write_flush(ap, SCR_CONTROL, 0x300);
1535 /* wait for phy to become ready, if necessary */
1538 sata_scr_read(ap, SCR_STATUS, &sstatus);
1539 if ((sstatus & 0xf) != 1)
1541 } while (time_before(jiffies, timeout));
1543 /* print link status */
1544 sata_print_link_status(ap);
1546 /* TODO: phy layer with polling, timeouts, etc. */
1547 if (!ata_port_offline(ap))
1550 ata_port_disable(ap);
1552 if (ap->flags & ATA_FLAG_DISABLED)
1555 if (ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT)) {
1556 ata_port_disable(ap);
1560 ap->cbl = ATA_CBL_SATA;
1564 * sata_phy_reset - Reset SATA bus.
1565 * @ap: SATA port associated with target SATA PHY.
1567 * This function resets the SATA bus, and then probes
1568 * the bus for devices.
1571 * PCI/etc. bus probe sem.
1574 void sata_phy_reset(struct ata_port *ap)
1576 __sata_phy_reset(ap);
1577 if (ap->flags & ATA_FLAG_DISABLED)
1583 * ata_dev_pair - return other device on cable
1586 * Obtain the other device on the same cable, or if none is
1587 * present NULL is returned
1590 struct ata_device *ata_dev_pair(struct ata_device *adev)
1592 struct ata_port *ap = adev->ap;
1593 struct ata_device *pair = &ap->device[1 - adev->devno];
1594 if (!ata_dev_enabled(pair))
1600 * ata_port_disable - Disable port.
1601 * @ap: Port to be disabled.
1603 * Modify @ap data structure such that the system
1604 * thinks that the entire port is disabled, and should
1605 * never attempt to probe or communicate with devices
1608 * LOCKING: host_set lock, or some other form of
1612 void ata_port_disable(struct ata_port *ap)
1614 ap->device[0].class = ATA_DEV_NONE;
1615 ap->device[1].class = ATA_DEV_NONE;
1616 ap->flags |= ATA_FLAG_DISABLED;
1620 * sata_down_spd_limit - adjust SATA spd limit downward
1621 * @ap: Port to adjust SATA spd limit for
1623 * Adjust SATA spd limit of @ap downward. Note that this
1624 * function only adjusts the limit. The change must be applied
1625 * using sata_set_spd().
1628 * Inherited from caller.
1631 * 0 on success, negative errno on failure
1633 int sata_down_spd_limit(struct ata_port *ap)
1635 u32 sstatus, spd, mask;
1638 rc = sata_scr_read(ap, SCR_STATUS, &sstatus);
1642 mask = ap->sata_spd_limit;
1645 highbit = fls(mask) - 1;
1646 mask &= ~(1 << highbit);
1648 spd = (sstatus >> 4) & 0xf;
1652 mask &= (1 << spd) - 1;
1656 ap->sata_spd_limit = mask;
1658 printk(KERN_WARNING "ata%u: limiting SATA link speed to %s\n",
1659 ap->id, sata_spd_string(fls(mask)));
1664 static int __sata_set_spd_needed(struct ata_port *ap, u32 *scontrol)
1668 if (ap->sata_spd_limit == UINT_MAX)
1671 limit = fls(ap->sata_spd_limit);
1673 spd = (*scontrol >> 4) & 0xf;
1674 *scontrol = (*scontrol & ~0xf0) | ((limit & 0xf) << 4);
1676 return spd != limit;
1680 * sata_set_spd_needed - is SATA spd configuration needed
1681 * @ap: Port in question
1683 * Test whether the spd limit in SControl matches
1684 * @ap->sata_spd_limit. This function is used to determine
1685 * whether hardreset is necessary to apply SATA spd
1689 * Inherited from caller.
1692 * 1 if SATA spd configuration is needed, 0 otherwise.
1694 int sata_set_spd_needed(struct ata_port *ap)
1698 if (sata_scr_read(ap, SCR_CONTROL, &scontrol))
1701 return __sata_set_spd_needed(ap, &scontrol);
1705 * sata_set_spd - set SATA spd according to spd limit
1706 * @ap: Port to set SATA spd for
1708 * Set SATA spd of @ap according to sata_spd_limit.
1711 * Inherited from caller.
1714 * 0 if spd doesn't need to be changed, 1 if spd has been
1715 * changed. Negative errno if SCR registers are inaccessible.
1717 int sata_set_spd(struct ata_port *ap)
1722 if ((rc = sata_scr_read(ap, SCR_CONTROL, &scontrol)))
1725 if (!__sata_set_spd_needed(ap, &scontrol))
1728 if ((rc = sata_scr_write(ap, SCR_CONTROL, scontrol)))
1735 * This mode timing computation functionality is ported over from
1736 * drivers/ide/ide-timing.h and was originally written by Vojtech Pavlik
1739 * PIO 0-5, MWDMA 0-2 and UDMA 0-6 timings (in nanoseconds).
1740 * These were taken from ATA/ATAPI-6 standard, rev 0a, except
1741 * for PIO 5, which is a nonstandard extension and UDMA6, which
1742 * is currently supported only by Maxtor drives.
1745 static const struct ata_timing ata_timing[] = {
1747 { XFER_UDMA_6, 0, 0, 0, 0, 0, 0, 0, 15 },
1748 { XFER_UDMA_5, 0, 0, 0, 0, 0, 0, 0, 20 },
1749 { XFER_UDMA_4, 0, 0, 0, 0, 0, 0, 0, 30 },
1750 { XFER_UDMA_3, 0, 0, 0, 0, 0, 0, 0, 45 },
1752 { XFER_UDMA_2, 0, 0, 0, 0, 0, 0, 0, 60 },
1753 { XFER_UDMA_1, 0, 0, 0, 0, 0, 0, 0, 80 },
1754 { XFER_UDMA_0, 0, 0, 0, 0, 0, 0, 0, 120 },
1756 /* { XFER_UDMA_SLOW, 0, 0, 0, 0, 0, 0, 0, 150 }, */
1758 { XFER_MW_DMA_2, 25, 0, 0, 0, 70, 25, 120, 0 },
1759 { XFER_MW_DMA_1, 45, 0, 0, 0, 80, 50, 150, 0 },
1760 { XFER_MW_DMA_0, 60, 0, 0, 0, 215, 215, 480, 0 },
1762 { XFER_SW_DMA_2, 60, 0, 0, 0, 120, 120, 240, 0 },
1763 { XFER_SW_DMA_1, 90, 0, 0, 0, 240, 240, 480, 0 },
1764 { XFER_SW_DMA_0, 120, 0, 0, 0, 480, 480, 960, 0 },
1766 /* { XFER_PIO_5, 20, 50, 30, 100, 50, 30, 100, 0 }, */
1767 { XFER_PIO_4, 25, 70, 25, 120, 70, 25, 120, 0 },
1768 { XFER_PIO_3, 30, 80, 70, 180, 80, 70, 180, 0 },
1770 { XFER_PIO_2, 30, 290, 40, 330, 100, 90, 240, 0 },
1771 { XFER_PIO_1, 50, 290, 93, 383, 125, 100, 383, 0 },
1772 { XFER_PIO_0, 70, 290, 240, 600, 165, 150, 600, 0 },
1774 /* { XFER_PIO_SLOW, 120, 290, 240, 960, 290, 240, 960, 0 }, */
1779 #define ENOUGH(v,unit) (((v)-1)/(unit)+1)
1780 #define EZ(v,unit) ((v)?ENOUGH(v,unit):0)
1782 static void ata_timing_quantize(const struct ata_timing *t, struct ata_timing *q, int T, int UT)
1784 q->setup = EZ(t->setup * 1000, T);
1785 q->act8b = EZ(t->act8b * 1000, T);
1786 q->rec8b = EZ(t->rec8b * 1000, T);
1787 q->cyc8b = EZ(t->cyc8b * 1000, T);
1788 q->active = EZ(t->active * 1000, T);
1789 q->recover = EZ(t->recover * 1000, T);
1790 q->cycle = EZ(t->cycle * 1000, T);
1791 q->udma = EZ(t->udma * 1000, UT);
1794 void ata_timing_merge(const struct ata_timing *a, const struct ata_timing *b,
1795 struct ata_timing *m, unsigned int what)
1797 if (what & ATA_TIMING_SETUP ) m->setup = max(a->setup, b->setup);
1798 if (what & ATA_TIMING_ACT8B ) m->act8b = max(a->act8b, b->act8b);
1799 if (what & ATA_TIMING_REC8B ) m->rec8b = max(a->rec8b, b->rec8b);
1800 if (what & ATA_TIMING_CYC8B ) m->cyc8b = max(a->cyc8b, b->cyc8b);
1801 if (what & ATA_TIMING_ACTIVE ) m->active = max(a->active, b->active);
1802 if (what & ATA_TIMING_RECOVER) m->recover = max(a->recover, b->recover);
1803 if (what & ATA_TIMING_CYCLE ) m->cycle = max(a->cycle, b->cycle);
1804 if (what & ATA_TIMING_UDMA ) m->udma = max(a->udma, b->udma);
1807 static const struct ata_timing* ata_timing_find_mode(unsigned short speed)
1809 const struct ata_timing *t;
1811 for (t = ata_timing; t->mode != speed; t++)
1812 if (t->mode == 0xFF)
1817 int ata_timing_compute(struct ata_device *adev, unsigned short speed,
1818 struct ata_timing *t, int T, int UT)
1820 const struct ata_timing *s;
1821 struct ata_timing p;
1827 if (!(s = ata_timing_find_mode(speed)))
1830 memcpy(t, s, sizeof(*s));
1833 * If the drive is an EIDE drive, it can tell us it needs extended
1834 * PIO/MW_DMA cycle timing.
1837 if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE drive */
1838 memset(&p, 0, sizeof(p));
1839 if(speed >= XFER_PIO_0 && speed <= XFER_SW_DMA_0) {
1840 if (speed <= XFER_PIO_2) p.cycle = p.cyc8b = adev->id[ATA_ID_EIDE_PIO];
1841 else p.cycle = p.cyc8b = adev->id[ATA_ID_EIDE_PIO_IORDY];
1842 } else if(speed >= XFER_MW_DMA_0 && speed <= XFER_MW_DMA_2) {
1843 p.cycle = adev->id[ATA_ID_EIDE_DMA_MIN];
1845 ata_timing_merge(&p, t, t, ATA_TIMING_CYCLE | ATA_TIMING_CYC8B);
1849 * Convert the timing to bus clock counts.
1852 ata_timing_quantize(t, t, T, UT);
1855 * Even in DMA/UDMA modes we still use PIO access for IDENTIFY,
1856 * S.M.A.R.T * and some other commands. We have to ensure that the
1857 * DMA cycle timing is slower/equal than the fastest PIO timing.
1860 if (speed > XFER_PIO_4) {
1861 ata_timing_compute(adev, adev->pio_mode, &p, T, UT);
1862 ata_timing_merge(&p, t, t, ATA_TIMING_ALL);
1866 * Lengthen active & recovery time so that cycle time is correct.
1869 if (t->act8b + t->rec8b < t->cyc8b) {
1870 t->act8b += (t->cyc8b - (t->act8b + t->rec8b)) / 2;
1871 t->rec8b = t->cyc8b - t->act8b;
1874 if (t->active + t->recover < t->cycle) {
1875 t->active += (t->cycle - (t->active + t->recover)) / 2;
1876 t->recover = t->cycle - t->active;
1883 * ata_down_xfermask_limit - adjust dev xfer masks downward
1884 * @dev: Device to adjust xfer masks
1885 * @force_pio0: Force PIO0
1887 * Adjust xfer masks of @dev downward. Note that this function
1888 * does not apply the change. Invoking ata_set_mode() afterwards
1889 * will apply the limit.
1892 * Inherited from caller.
1895 * 0 on success, negative errno on failure
1897 int ata_down_xfermask_limit(struct ata_device *dev, int force_pio0)
1899 struct ata_port *ap = dev->ap;
1900 unsigned long xfer_mask;
1903 xfer_mask = ata_pack_xfermask(dev->pio_mask, dev->mwdma_mask,
1908 /* don't gear down to MWDMA from UDMA, go directly to PIO */
1909 if (xfer_mask & ATA_MASK_UDMA)
1910 xfer_mask &= ~ATA_MASK_MWDMA;
1912 highbit = fls(xfer_mask) - 1;
1913 xfer_mask &= ~(1 << highbit);
1915 xfer_mask &= 1 << ATA_SHIFT_PIO;
1919 ata_unpack_xfermask(xfer_mask, &dev->pio_mask, &dev->mwdma_mask,
1922 printk(KERN_WARNING "ata%u: dev %u limiting speed to %s\n",
1923 ap->id, dev->devno, ata_mode_string(xfer_mask));
1931 static int ata_dev_set_mode(struct ata_device *dev)
1933 struct ata_port *ap = dev->ap;
1934 unsigned int err_mask;
1937 dev->flags &= ~ATA_DFLAG_PIO;
1938 if (dev->xfer_shift == ATA_SHIFT_PIO)
1939 dev->flags |= ATA_DFLAG_PIO;
1941 err_mask = ata_dev_set_xfermode(dev);
1944 "ata%u: failed to set xfermode (err_mask=0x%x)\n",
1949 rc = ata_dev_revalidate(dev, 0);
1953 DPRINTK("xfer_shift=%u, xfer_mode=0x%x\n",
1954 dev->xfer_shift, (int)dev->xfer_mode);
1956 printk(KERN_INFO "ata%u: dev %u configured for %s\n",
1958 ata_mode_string(ata_xfer_mode2mask(dev->xfer_mode)));
1963 * ata_set_mode - Program timings and issue SET FEATURES - XFER
1964 * @ap: port on which timings will be programmed
1965 * @r_failed_dev: out paramter for failed device
1967 * Set ATA device disk transfer mode (PIO3, UDMA6, etc.). If
1968 * ata_set_mode() fails, pointer to the failing device is
1969 * returned in @r_failed_dev.
1972 * PCI/etc. bus probe sem.
1975 * 0 on success, negative errno otherwise
1977 int ata_set_mode(struct ata_port *ap, struct ata_device **r_failed_dev)
1979 struct ata_device *dev;
1980 int i, rc = 0, used_dma = 0, found = 0;
1982 /* has private set_mode? */
1983 if (ap->ops->set_mode) {
1984 /* FIXME: make ->set_mode handle no device case and
1985 * return error code and failing device on failure.
1987 for (i = 0; i < ATA_MAX_DEVICES; i++) {
1988 if (ata_dev_enabled(&ap->device[i])) {
1989 ap->ops->set_mode(ap);
1996 /* step 1: calculate xfer_mask */
1997 for (i = 0; i < ATA_MAX_DEVICES; i++) {
1998 unsigned int pio_mask, dma_mask;
2000 dev = &ap->device[i];
2002 if (!ata_dev_enabled(dev))
2005 ata_dev_xfermask(dev);
2007 pio_mask = ata_pack_xfermask(dev->pio_mask, 0, 0);
2008 dma_mask = ata_pack_xfermask(0, dev->mwdma_mask, dev->udma_mask);
2009 dev->pio_mode = ata_xfer_mask2mode(pio_mask);
2010 dev->dma_mode = ata_xfer_mask2mode(dma_mask);
2019 /* step 2: always set host PIO timings */
2020 for (i = 0; i < ATA_MAX_DEVICES; i++) {
2021 dev = &ap->device[i];
2022 if (!ata_dev_enabled(dev))
2025 if (!dev->pio_mode) {
2026 printk(KERN_WARNING "ata%u: dev %u no PIO support\n",
2027 ap->id, dev->devno);
2032 dev->xfer_mode = dev->pio_mode;
2033 dev->xfer_shift = ATA_SHIFT_PIO;
2034 if (ap->ops->set_piomode)
2035 ap->ops->set_piomode(ap, dev);
2038 /* step 3: set host DMA timings */
2039 for (i = 0; i < ATA_MAX_DEVICES; i++) {
2040 dev = &ap->device[i];
2042 if (!ata_dev_enabled(dev) || !dev->dma_mode)
2045 dev->xfer_mode = dev->dma_mode;
2046 dev->xfer_shift = ata_xfer_mode2shift(dev->dma_mode);
2047 if (ap->ops->set_dmamode)
2048 ap->ops->set_dmamode(ap, dev);
2051 /* step 4: update devices' xfer mode */
2052 for (i = 0; i < ATA_MAX_DEVICES; i++) {
2053 dev = &ap->device[i];
2055 if (!ata_dev_enabled(dev))
2058 rc = ata_dev_set_mode(dev);
2063 /* Record simplex status. If we selected DMA then the other
2064 * host channels are not permitted to do so.
2066 if (used_dma && (ap->host_set->flags & ATA_HOST_SIMPLEX))
2067 ap->host_set->simplex_claimed = 1;
2069 /* step5: chip specific finalisation */
2070 if (ap->ops->post_set_mode)
2071 ap->ops->post_set_mode(ap);
2075 *r_failed_dev = dev;
2080 * ata_tf_to_host - issue ATA taskfile to host controller
2081 * @ap: port to which command is being issued
2082 * @tf: ATA taskfile register set
2084 * Issues ATA taskfile register set to ATA host controller,
2085 * with proper synchronization with interrupt handler and
2089 * spin_lock_irqsave(host_set lock)
2092 static inline void ata_tf_to_host(struct ata_port *ap,
2093 const struct ata_taskfile *tf)
2095 ap->ops->tf_load(ap, tf);
2096 ap->ops->exec_command(ap, tf);
2100 * ata_busy_sleep - sleep until BSY clears, or timeout
2101 * @ap: port containing status register to be polled
2102 * @tmout_pat: impatience timeout
2103 * @tmout: overall timeout
2105 * Sleep until ATA Status register bit BSY clears,
2106 * or a timeout occurs.
2111 unsigned int ata_busy_sleep (struct ata_port *ap,
2112 unsigned long tmout_pat, unsigned long tmout)
2114 unsigned long timer_start, timeout;
2117 status = ata_busy_wait(ap, ATA_BUSY, 300);
2118 timer_start = jiffies;
2119 timeout = timer_start + tmout_pat;
2120 while ((status & ATA_BUSY) && (time_before(jiffies, timeout))) {
2122 status = ata_busy_wait(ap, ATA_BUSY, 3);
2125 if (status & ATA_BUSY)
2126 printk(KERN_WARNING "ata%u is slow to respond, "
2127 "please be patient\n", ap->id);
2129 timeout = timer_start + tmout;
2130 while ((status & ATA_BUSY) && (time_before(jiffies, timeout))) {
2132 status = ata_chk_status(ap);
2135 if (status & ATA_BUSY) {
2136 printk(KERN_ERR "ata%u failed to respond (%lu secs)\n",
2137 ap->id, tmout / HZ);
2144 static void ata_bus_post_reset(struct ata_port *ap, unsigned int devmask)
2146 struct ata_ioports *ioaddr = &ap->ioaddr;
2147 unsigned int dev0 = devmask & (1 << 0);
2148 unsigned int dev1 = devmask & (1 << 1);
2149 unsigned long timeout;
2151 /* if device 0 was found in ata_devchk, wait for its
2155 ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT);
2157 /* if device 1 was found in ata_devchk, wait for
2158 * register access, then wait for BSY to clear
2160 timeout = jiffies + ATA_TMOUT_BOOT;
2164 ap->ops->dev_select(ap, 1);
2165 if (ap->flags & ATA_FLAG_MMIO) {
2166 nsect = readb((void __iomem *) ioaddr->nsect_addr);
2167 lbal = readb((void __iomem *) ioaddr->lbal_addr);
2169 nsect = inb(ioaddr->nsect_addr);
2170 lbal = inb(ioaddr->lbal_addr);
2172 if ((nsect == 1) && (lbal == 1))
2174 if (time_after(jiffies, timeout)) {
2178 msleep(50); /* give drive a breather */
2181 ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT);
2183 /* is all this really necessary? */
2184 ap->ops->dev_select(ap, 0);
2186 ap->ops->dev_select(ap, 1);
2188 ap->ops->dev_select(ap, 0);
2191 static unsigned int ata_bus_softreset(struct ata_port *ap,
2192 unsigned int devmask)
2194 struct ata_ioports *ioaddr = &ap->ioaddr;
2196 DPRINTK("ata%u: bus reset via SRST\n", ap->id);
2198 /* software reset. causes dev0 to be selected */
2199 if (ap->flags & ATA_FLAG_MMIO) {
2200 writeb(ap->ctl, (void __iomem *) ioaddr->ctl_addr);
2201 udelay(20); /* FIXME: flush */
2202 writeb(ap->ctl | ATA_SRST, (void __iomem *) ioaddr->ctl_addr);
2203 udelay(20); /* FIXME: flush */
2204 writeb(ap->ctl, (void __iomem *) ioaddr->ctl_addr);
2206 outb(ap->ctl, ioaddr->ctl_addr);
2208 outb(ap->ctl | ATA_SRST, ioaddr->ctl_addr);
2210 outb(ap->ctl, ioaddr->ctl_addr);
2213 /* spec mandates ">= 2ms" before checking status.
2214 * We wait 150ms, because that was the magic delay used for
2215 * ATAPI devices in Hale Landis's ATADRVR, for the period of time
2216 * between when the ATA command register is written, and then
2217 * status is checked. Because waiting for "a while" before
2218 * checking status is fine, post SRST, we perform this magic
2219 * delay here as well.
2221 * Old drivers/ide uses the 2mS rule and then waits for ready
2225 /* Before we perform post reset processing we want to see if
2226 * the bus shows 0xFF because the odd clown forgets the D7
2227 * pulldown resistor.
2229 if (ata_check_status(ap) == 0xFF) {
2230 printk(KERN_ERR "ata%u: SRST failed (status 0xFF)\n", ap->id);
2231 return AC_ERR_OTHER;
2234 ata_bus_post_reset(ap, devmask);
2240 * ata_bus_reset - reset host port and associated ATA channel
2241 * @ap: port to reset
2243 * This is typically the first time we actually start issuing
2244 * commands to the ATA channel. We wait for BSY to clear, then
2245 * issue EXECUTE DEVICE DIAGNOSTIC command, polling for its
2246 * result. Determine what devices, if any, are on the channel
2247 * by looking at the device 0/1 error register. Look at the signature
2248 * stored in each device's taskfile registers, to determine if
2249 * the device is ATA or ATAPI.
2252 * PCI/etc. bus probe sem.
2253 * Obtains host_set lock.
2256 * Sets ATA_FLAG_DISABLED if bus reset fails.
2259 void ata_bus_reset(struct ata_port *ap)
2261 struct ata_ioports *ioaddr = &ap->ioaddr;
2262 unsigned int slave_possible = ap->flags & ATA_FLAG_SLAVE_POSS;
2264 unsigned int dev0, dev1 = 0, devmask = 0;
2266 DPRINTK("ENTER, host %u, port %u\n", ap->id, ap->port_no);
2268 /* determine if device 0/1 are present */
2269 if (ap->flags & ATA_FLAG_SATA_RESET)
2272 dev0 = ata_devchk(ap, 0);
2274 dev1 = ata_devchk(ap, 1);
2278 devmask |= (1 << 0);
2280 devmask |= (1 << 1);
2282 /* select device 0 again */
2283 ap->ops->dev_select(ap, 0);
2285 /* issue bus reset */
2286 if (ap->flags & ATA_FLAG_SRST)
2287 if (ata_bus_softreset(ap, devmask))
2291 * determine by signature whether we have ATA or ATAPI devices
2293 ap->device[0].class = ata_dev_try_classify(ap, 0, &err);
2294 if ((slave_possible) && (err != 0x81))
2295 ap->device[1].class = ata_dev_try_classify(ap, 1, &err);
2297 /* re-enable interrupts */
2298 if (ap->ioaddr.ctl_addr) /* FIXME: hack. create a hook instead */
2301 /* is double-select really necessary? */
2302 if (ap->device[1].class != ATA_DEV_NONE)
2303 ap->ops->dev_select(ap, 1);
2304 if (ap->device[0].class != ATA_DEV_NONE)
2305 ap->ops->dev_select(ap, 0);
2307 /* if no devices were detected, disable this port */
2308 if ((ap->device[0].class == ATA_DEV_NONE) &&
2309 (ap->device[1].class == ATA_DEV_NONE))
2312 if (ap->flags & (ATA_FLAG_SATA_RESET | ATA_FLAG_SRST)) {
2313 /* set up device control for ATA_FLAG_SATA_RESET */
2314 if (ap->flags & ATA_FLAG_MMIO)
2315 writeb(ap->ctl, (void __iomem *) ioaddr->ctl_addr);
2317 outb(ap->ctl, ioaddr->ctl_addr);
2324 printk(KERN_ERR "ata%u: disabling port\n", ap->id);
2325 ap->ops->port_disable(ap);
2330 static int sata_phy_resume(struct ata_port *ap)
2332 unsigned long timeout = jiffies + (HZ * 5);
2333 u32 scontrol, sstatus;
2336 if ((rc = sata_scr_read(ap, SCR_CONTROL, &scontrol)))
2339 scontrol = (scontrol & 0x0f0) | 0x300;
2341 if ((rc = sata_scr_write(ap, SCR_CONTROL, scontrol)))
2344 /* Wait for phy to become ready, if necessary. */
2347 if ((rc = sata_scr_read(ap, SCR_STATUS, &sstatus)))
2349 if ((sstatus & 0xf) != 1)
2351 } while (time_before(jiffies, timeout));
2357 * ata_std_probeinit - initialize probing
2358 * @ap: port to be probed
2360 * @ap is about to be probed. Initialize it. This function is
2361 * to be used as standard callback for ata_drive_probe_reset().
2363 * NOTE!!! Do not use this function as probeinit if a low level
2364 * driver implements only hardreset. Just pass NULL as probeinit
2365 * in that case. Using this function is probably okay but doing
2366 * so makes reset sequence different from the original
2367 * ->phy_reset implementation and Jeff nervous. :-P
2369 void ata_std_probeinit(struct ata_port *ap)
2374 sata_phy_resume(ap);
2376 /* init sata_spd_limit to the current value */
2377 if (sata_scr_read(ap, SCR_CONTROL, &scontrol) == 0) {
2378 int spd = (scontrol >> 4) & 0xf;
2379 ap->sata_spd_limit &= (1 << spd) - 1;
2382 /* wait for device */
2383 if (ata_port_online(ap))
2384 ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT);
2388 * ata_std_softreset - reset host port via ATA SRST
2389 * @ap: port to reset
2390 * @classes: resulting classes of attached devices
2392 * Reset host port using ATA SRST. This function is to be used
2393 * as standard callback for ata_drive_*_reset() functions.
2396 * Kernel thread context (may sleep)
2399 * 0 on success, -errno otherwise.
2401 int ata_std_softreset(struct ata_port *ap, unsigned int *classes)
2403 unsigned int slave_possible = ap->flags & ATA_FLAG_SLAVE_POSS;
2404 unsigned int devmask = 0, err_mask;
2409 if (ata_port_offline(ap)) {
2410 classes[0] = ATA_DEV_NONE;
2414 /* determine if device 0/1 are present */
2415 if (ata_devchk(ap, 0))
2416 devmask |= (1 << 0);
2417 if (slave_possible && ata_devchk(ap, 1))
2418 devmask |= (1 << 1);
2420 /* select device 0 again */
2421 ap->ops->dev_select(ap, 0);
2423 /* issue bus reset */
2424 DPRINTK("about to softreset, devmask=%x\n", devmask);
2425 err_mask = ata_bus_softreset(ap, devmask);
2427 printk(KERN_ERR "ata%u: SRST failed (err_mask=0x%x)\n",
2432 /* determine by signature whether we have ATA or ATAPI devices */
2433 classes[0] = ata_dev_try_classify(ap, 0, &err);
2434 if (slave_possible && err != 0x81)
2435 classes[1] = ata_dev_try_classify(ap, 1, &err);
2438 DPRINTK("EXIT, classes[0]=%u [1]=%u\n", classes[0], classes[1]);
2443 * sata_std_hardreset - reset host port via SATA phy reset
2444 * @ap: port to reset
2445 * @class: resulting class of attached device
2447 * SATA phy-reset host port using DET bits of SControl register.
2448 * This function is to be used as standard callback for
2449 * ata_drive_*_reset().
2452 * Kernel thread context (may sleep)
2455 * 0 on success, -errno otherwise.
2457 int sata_std_hardreset(struct ata_port *ap, unsigned int *class)
2464 if (sata_set_spd_needed(ap)) {
2465 /* SATA spec says nothing about how to reconfigure
2466 * spd. To be on the safe side, turn off phy during
2467 * reconfiguration. This works for at least ICH7 AHCI
2470 if ((rc = sata_scr_read(ap, SCR_CONTROL, &scontrol)))
2473 scontrol = (scontrol & 0x0f0) | 0x302;
2475 if ((rc = sata_scr_write(ap, SCR_CONTROL, scontrol)))
2481 /* issue phy wake/reset */
2482 if ((rc = sata_scr_read(ap, SCR_CONTROL, &scontrol)))
2485 scontrol = (scontrol & 0x0f0) | 0x301;
2487 if ((rc = sata_scr_write_flush(ap, SCR_CONTROL, scontrol)))
2490 /* Couldn't find anything in SATA I/II specs, but AHCI-1.1
2491 * 10.4.2 says at least 1 ms.
2495 /* bring phy back */
2496 sata_phy_resume(ap);
2498 /* TODO: phy layer with polling, timeouts, etc. */
2499 if (ata_port_offline(ap)) {
2500 *class = ATA_DEV_NONE;
2501 DPRINTK("EXIT, link offline\n");
2505 if (ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT)) {
2507 "ata%u: COMRESET failed (device not ready)\n", ap->id);
2511 ap->ops->dev_select(ap, 0); /* probably unnecessary */
2513 *class = ata_dev_try_classify(ap, 0, NULL);
2515 DPRINTK("EXIT, class=%u\n", *class);
2520 * ata_std_postreset - standard postreset callback
2521 * @ap: the target ata_port
2522 * @classes: classes of attached devices
2524 * This function is invoked after a successful reset. Note that
2525 * the device might have been reset more than once using
2526 * different reset methods before postreset is invoked.
2528 * This function is to be used as standard callback for
2529 * ata_drive_*_reset().
2532 * Kernel thread context (may sleep)
2534 void ata_std_postreset(struct ata_port *ap, unsigned int *classes)
2538 /* print link status */
2539 sata_print_link_status(ap);
2541 /* re-enable interrupts */
2542 if (ap->ioaddr.ctl_addr) /* FIXME: hack. create a hook instead */
2545 /* is double-select really necessary? */
2546 if (classes[0] != ATA_DEV_NONE)
2547 ap->ops->dev_select(ap, 1);
2548 if (classes[1] != ATA_DEV_NONE)
2549 ap->ops->dev_select(ap, 0);
2551 /* bail out if no device is present */
2552 if (classes[0] == ATA_DEV_NONE && classes[1] == ATA_DEV_NONE) {
2553 DPRINTK("EXIT, no device\n");
2557 /* set up device control */
2558 if (ap->ioaddr.ctl_addr) {
2559 if (ap->flags & ATA_FLAG_MMIO)
2560 writeb(ap->ctl, (void __iomem *) ap->ioaddr.ctl_addr);
2562 outb(ap->ctl, ap->ioaddr.ctl_addr);
2569 * ata_std_probe_reset - standard probe reset method
2570 * @ap: prot to perform probe-reset
2571 * @classes: resulting classes of attached devices
2573 * The stock off-the-shelf ->probe_reset method.
2576 * Kernel thread context (may sleep)
2579 * 0 on success, -errno otherwise.
2581 int ata_std_probe_reset(struct ata_port *ap, unsigned int *classes)
2583 ata_reset_fn_t hardreset;
2586 if (sata_scr_valid(ap))
2587 hardreset = sata_std_hardreset;
2589 return ata_drive_probe_reset(ap, ata_std_probeinit,
2590 ata_std_softreset, hardreset,
2591 ata_std_postreset, classes);
2594 int ata_do_reset(struct ata_port *ap, ata_reset_fn_t reset,
2595 unsigned int *classes)
2599 for (i = 0; i < ATA_MAX_DEVICES; i++)
2600 classes[i] = ATA_DEV_UNKNOWN;
2602 rc = reset(ap, classes);
2606 /* If any class isn't ATA_DEV_UNKNOWN, consider classification
2607 * is complete and convert all ATA_DEV_UNKNOWN to
2610 for (i = 0; i < ATA_MAX_DEVICES; i++)
2611 if (classes[i] != ATA_DEV_UNKNOWN)
2614 if (i < ATA_MAX_DEVICES)
2615 for (i = 0; i < ATA_MAX_DEVICES; i++)
2616 if (classes[i] == ATA_DEV_UNKNOWN)
2617 classes[i] = ATA_DEV_NONE;
2623 * ata_drive_probe_reset - Perform probe reset with given methods
2624 * @ap: port to reset
2625 * @probeinit: probeinit method (can be NULL)
2626 * @softreset: softreset method (can be NULL)
2627 * @hardreset: hardreset method (can be NULL)
2628 * @postreset: postreset method (can be NULL)
2629 * @classes: resulting classes of attached devices
2631 * Reset the specified port and classify attached devices using
2632 * given methods. This function prefers softreset but tries all
2633 * possible reset sequences to reset and classify devices. This
2634 * function is intended to be used for constructing ->probe_reset
2635 * callback by low level drivers.
2637 * Reset methods should follow the following rules.
2639 * - Return 0 on sucess, -errno on failure.
2640 * - If classification is supported, fill classes[] with
2641 * recognized class codes.
2642 * - If classification is not supported, leave classes[] alone.
2645 * Kernel thread context (may sleep)
2648 * 0 on success, -EINVAL if no reset method is avaliable, -ENODEV
2649 * if classification fails, and any error code from reset
2652 int ata_drive_probe_reset(struct ata_port *ap, ata_probeinit_fn_t probeinit,
2653 ata_reset_fn_t softreset, ata_reset_fn_t hardreset,
2654 ata_postreset_fn_t postreset, unsigned int *classes)
2661 if (softreset && !sata_set_spd_needed(ap)) {
2662 rc = ata_do_reset(ap, softreset, classes);
2663 if (rc == 0 && classes[0] != ATA_DEV_UNKNOWN)
2665 printk(KERN_INFO "ata%u: softreset failed, will try "
2666 "hardreset in 5 secs\n", ap->id);
2674 rc = ata_do_reset(ap, hardreset, classes);
2676 if (classes[0] != ATA_DEV_UNKNOWN)
2681 if (sata_down_spd_limit(ap))
2684 printk(KERN_INFO "ata%u: hardreset failed, will retry "
2685 "in 5 secs\n", ap->id);
2690 printk(KERN_INFO "ata%u: hardreset succeeded without "
2691 "classification, will retry softreset in 5 secs\n",
2695 rc = ata_do_reset(ap, softreset, classes);
2701 postreset(ap, classes);
2702 if (classes[0] == ATA_DEV_UNKNOWN)
2709 * ata_dev_same_device - Determine whether new ID matches configured device
2710 * @dev: device to compare against
2711 * @new_class: class of the new device
2712 * @new_id: IDENTIFY page of the new device
2714 * Compare @new_class and @new_id against @dev and determine
2715 * whether @dev is the device indicated by @new_class and
2722 * 1 if @dev matches @new_class and @new_id, 0 otherwise.
2724 static int ata_dev_same_device(struct ata_device *dev, unsigned int new_class,
2727 struct ata_port *ap = dev->ap;
2728 const u16 *old_id = dev->id;
2729 unsigned char model[2][41], serial[2][21];
2732 if (dev->class != new_class) {
2734 "ata%u: dev %u class mismatch %d != %d\n",
2735 ap->id, dev->devno, dev->class, new_class);
2739 ata_id_c_string(old_id, model[0], ATA_ID_PROD_OFS, sizeof(model[0]));
2740 ata_id_c_string(new_id, model[1], ATA_ID_PROD_OFS, sizeof(model[1]));
2741 ata_id_c_string(old_id, serial[0], ATA_ID_SERNO_OFS, sizeof(serial[0]));
2742 ata_id_c_string(new_id, serial[1], ATA_ID_SERNO_OFS, sizeof(serial[1]));
2743 new_n_sectors = ata_id_n_sectors(new_id);
2745 if (strcmp(model[0], model[1])) {
2747 "ata%u: dev %u model number mismatch '%s' != '%s'\n",
2748 ap->id, dev->devno, model[0], model[1]);
2752 if (strcmp(serial[0], serial[1])) {
2754 "ata%u: dev %u serial number mismatch '%s' != '%s'\n",
2755 ap->id, dev->devno, serial[0], serial[1]);
2759 if (dev->class == ATA_DEV_ATA && dev->n_sectors != new_n_sectors) {
2761 "ata%u: dev %u n_sectors mismatch %llu != %llu\n",
2762 ap->id, dev->devno, (unsigned long long)dev->n_sectors,
2763 (unsigned long long)new_n_sectors);
2771 * ata_dev_revalidate - Revalidate ATA device
2772 * @dev: device to revalidate
2773 * @post_reset: is this revalidation after reset?
2775 * Re-read IDENTIFY page and make sure @dev is still attached to
2779 * Kernel thread context (may sleep)
2782 * 0 on success, negative errno otherwise
2784 int ata_dev_revalidate(struct ata_device *dev, int post_reset)
2786 struct ata_port *ap = dev->ap;
2787 unsigned int class = dev->class;
2788 u16 *id = (void *)ap->sector_buf;
2791 if (!ata_dev_enabled(dev)) {
2797 rc = ata_dev_read_id(dev, &class, post_reset, id);
2801 /* is the device still there? */
2802 if (!ata_dev_same_device(dev, class, id)) {
2807 memcpy(dev->id, id, sizeof(id[0]) * ATA_ID_WORDS);
2809 /* configure device according to the new ID */
2810 rc = ata_dev_configure(dev, 0);
2815 printk(KERN_ERR "ata%u: dev %u revalidation failed (errno=%d)\n",
2816 ap->id, dev->devno, rc);
2820 static const char * const ata_dma_blacklist [] = {
2821 "WDC AC11000H", NULL,
2822 "WDC AC22100H", NULL,
2823 "WDC AC32500H", NULL,
2824 "WDC AC33100H", NULL,
2825 "WDC AC31600H", NULL,
2826 "WDC AC32100H", "24.09P07",
2827 "WDC AC23200L", "21.10N21",
2828 "Compaq CRD-8241B", NULL,
2833 "SanDisk SDP3B", NULL,
2834 "SanDisk SDP3B-64", NULL,
2835 "SANYO CD-ROM CRD", NULL,
2836 "HITACHI CDR-8", NULL,
2837 "HITACHI CDR-8335", NULL,
2838 "HITACHI CDR-8435", NULL,
2839 "Toshiba CD-ROM XM-6202B", NULL,
2840 "TOSHIBA CD-ROM XM-1702BC", NULL,
2842 "E-IDE CD-ROM CR-840", NULL,
2843 "CD-ROM Drive/F5A", NULL,
2844 "WPI CDD-820", NULL,
2845 "SAMSUNG CD-ROM SC-148C", NULL,
2846 "SAMSUNG CD-ROM SC", NULL,
2847 "SanDisk SDP3B-64", NULL,
2848 "ATAPI CD-ROM DRIVE 40X MAXIMUM",NULL,
2849 "_NEC DV5800A", NULL,
2850 "SAMSUNG CD-ROM SN-124", "N001"
2853 static int ata_strim(char *s, size_t len)
2855 len = strnlen(s, len);
2857 /* ATAPI specifies that empty space is blank-filled; remove blanks */
2858 while ((len > 0) && (s[len - 1] == ' ')) {
2865 static int ata_dma_blacklisted(const struct ata_device *dev)
2867 unsigned char model_num[40];
2868 unsigned char model_rev[16];
2869 unsigned int nlen, rlen;
2872 ata_id_string(dev->id, model_num, ATA_ID_PROD_OFS,
2874 ata_id_string(dev->id, model_rev, ATA_ID_FW_REV_OFS,
2876 nlen = ata_strim(model_num, sizeof(model_num));
2877 rlen = ata_strim(model_rev, sizeof(model_rev));
2879 for (i = 0; i < ARRAY_SIZE(ata_dma_blacklist); i += 2) {
2880 if (!strncmp(ata_dma_blacklist[i], model_num, nlen)) {
2881 if (ata_dma_blacklist[i+1] == NULL)
2883 if (!strncmp(ata_dma_blacklist[i], model_rev, rlen))
2891 * ata_dev_xfermask - Compute supported xfermask of the given device
2892 * @dev: Device to compute xfermask for
2894 * Compute supported xfermask of @dev and store it in
2895 * dev->*_mask. This function is responsible for applying all
2896 * known limits including host controller limits, device
2899 * FIXME: The current implementation limits all transfer modes to
2900 * the fastest of the lowested device on the port. This is not
2901 * required on most controllers.
2906 static void ata_dev_xfermask(struct ata_device *dev)
2908 struct ata_port *ap = dev->ap;
2909 struct ata_host_set *hs = ap->host_set;
2910 unsigned long xfer_mask;
2913 xfer_mask = ata_pack_xfermask(ap->pio_mask,
2914 ap->mwdma_mask, ap->udma_mask);
2916 /* Apply cable rule here. Don't apply it early because when
2917 * we handle hot plug the cable type can itself change.
2919 if (ap->cbl == ATA_CBL_PATA40)
2920 xfer_mask &= ~(0xF8 << ATA_SHIFT_UDMA);
2922 /* FIXME: Use port-wide xfermask for now */
2923 for (i = 0; i < ATA_MAX_DEVICES; i++) {
2924 struct ata_device *d = &ap->device[i];
2926 if (ata_dev_absent(d))
2929 if (ata_dev_disabled(d)) {
2930 /* to avoid violating device selection timing */
2931 xfer_mask &= ata_pack_xfermask(d->pio_mask,
2932 UINT_MAX, UINT_MAX);
2936 xfer_mask &= ata_pack_xfermask(d->pio_mask,
2937 d->mwdma_mask, d->udma_mask);
2938 xfer_mask &= ata_id_xfermask(d->id);
2939 if (ata_dma_blacklisted(d))
2940 xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA);
2943 if (ata_dma_blacklisted(dev))
2944 printk(KERN_WARNING "ata%u: dev %u is on DMA blacklist, "
2945 "disabling DMA\n", ap->id, dev->devno);
2947 if (hs->flags & ATA_HOST_SIMPLEX) {
2948 if (hs->simplex_claimed)
2949 xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA);
2952 if (ap->ops->mode_filter)
2953 xfer_mask = ap->ops->mode_filter(ap, dev, xfer_mask);
2955 ata_unpack_xfermask(xfer_mask, &dev->pio_mask,
2956 &dev->mwdma_mask, &dev->udma_mask);
2960 * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command
2961 * @dev: Device to which command will be sent
2963 * Issue SET FEATURES - XFER MODE command to device @dev
2967 * PCI/etc. bus probe sem.
2970 * 0 on success, AC_ERR_* mask otherwise.
2973 static unsigned int ata_dev_set_xfermode(struct ata_device *dev)
2975 struct ata_taskfile tf;
2976 unsigned int err_mask;
2978 /* set up set-features taskfile */
2979 DPRINTK("set features - xfer mode\n");
2981 ata_tf_init(dev, &tf);
2982 tf.command = ATA_CMD_SET_FEATURES;
2983 tf.feature = SETFEATURES_XFER;
2984 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2985 tf.protocol = ATA_PROT_NODATA;
2986 tf.nsect = dev->xfer_mode;
2988 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0);
2990 DPRINTK("EXIT, err_mask=%x\n", err_mask);
2995 * ata_dev_init_params - Issue INIT DEV PARAMS command
2996 * @dev: Device to which command will be sent
2997 * @heads: Number of heads
2998 * @sectors: Number of sectors
3001 * Kernel thread context (may sleep)
3004 * 0 on success, AC_ERR_* mask otherwise.
3006 static unsigned int ata_dev_init_params(struct ata_device *dev,
3007 u16 heads, u16 sectors)
3009 struct ata_taskfile tf;
3010 unsigned int err_mask;
3012 /* Number of sectors per track 1-255. Number of heads 1-16 */
3013 if (sectors < 1 || sectors > 255 || heads < 1 || heads > 16)
3014 return AC_ERR_INVALID;
3016 /* set up init dev params taskfile */
3017 DPRINTK("init dev params \n");
3019 ata_tf_init(dev, &tf);
3020 tf.command = ATA_CMD_INIT_DEV_PARAMS;
3021 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
3022 tf.protocol = ATA_PROT_NODATA;
3024 tf.device |= (heads - 1) & 0x0f; /* max head = num. of heads - 1 */
3026 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0);
3028 DPRINTK("EXIT, err_mask=%x\n", err_mask);
3033 * ata_sg_clean - Unmap DMA memory associated with command
3034 * @qc: Command containing DMA memory to be released
3036 * Unmap all mapped DMA memory associated with this command.
3039 * spin_lock_irqsave(host_set lock)
3042 static void ata_sg_clean(struct ata_queued_cmd *qc)
3044 struct ata_port *ap = qc->ap;
3045 struct scatterlist *sg = qc->__sg;
3046 int dir = qc->dma_dir;
3047 void *pad_buf = NULL;
3049 WARN_ON(!(qc->flags & ATA_QCFLAG_DMAMAP));
3050 WARN_ON(sg == NULL);
3052 if (qc->flags & ATA_QCFLAG_SINGLE)
3053 WARN_ON(qc->n_elem > 1);
3055 VPRINTK("unmapping %u sg elements\n", qc->n_elem);
3057 /* if we padded the buffer out to 32-bit bound, and data
3058 * xfer direction is from-device, we must copy from the
3059 * pad buffer back into the supplied buffer
3061 if (qc->pad_len && !(qc->tf.flags & ATA_TFLAG_WRITE))
3062 pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ);
3064 if (qc->flags & ATA_QCFLAG_SG) {
3066 dma_unmap_sg(ap->dev, sg, qc->n_elem, dir);
3067 /* restore last sg */
3068 sg[qc->orig_n_elem - 1].length += qc->pad_len;
3070 struct scatterlist *psg = &qc->pad_sgent;
3071 void *addr = kmap_atomic(psg->page, KM_IRQ0);
3072 memcpy(addr + psg->offset, pad_buf, qc->pad_len);
3073 kunmap_atomic(addr, KM_IRQ0);
3077 dma_unmap_single(ap->dev,
3078 sg_dma_address(&sg[0]), sg_dma_len(&sg[0]),
3081 sg->length += qc->pad_len;
3083 memcpy(qc->buf_virt + sg->length - qc->pad_len,
3084 pad_buf, qc->pad_len);
3087 qc->flags &= ~ATA_QCFLAG_DMAMAP;
3092 * ata_fill_sg - Fill PCI IDE PRD table
3093 * @qc: Metadata associated with taskfile to be transferred
3095 * Fill PCI IDE PRD (scatter-gather) table with segments
3096 * associated with the current disk command.
3099 * spin_lock_irqsave(host_set lock)
3102 static void ata_fill_sg(struct ata_queued_cmd *qc)
3104 struct ata_port *ap = qc->ap;
3105 struct scatterlist *sg;
3108 WARN_ON(qc->__sg == NULL);
3109 WARN_ON(qc->n_elem == 0 && qc->pad_len == 0);
3112 ata_for_each_sg(sg, qc) {
3116 /* determine if physical DMA addr spans 64K boundary.
3117 * Note h/w doesn't support 64-bit, so we unconditionally
3118 * truncate dma_addr_t to u32.
3120 addr = (u32) sg_dma_address(sg);
3121 sg_len = sg_dma_len(sg);
3124 offset = addr & 0xffff;
3126 if ((offset + sg_len) > 0x10000)
3127 len = 0x10000 - offset;
3129 ap->prd[idx].addr = cpu_to_le32(addr);
3130 ap->prd[idx].flags_len = cpu_to_le32(len & 0xffff);
3131 VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", idx, addr, len);
3140 ap->prd[idx - 1].flags_len |= cpu_to_le32(ATA_PRD_EOT);
3143 * ata_check_atapi_dma - Check whether ATAPI DMA can be supported
3144 * @qc: Metadata associated with taskfile to check
3146 * Allow low-level driver to filter ATA PACKET commands, returning
3147 * a status indicating whether or not it is OK to use DMA for the
3148 * supplied PACKET command.
3151 * spin_lock_irqsave(host_set lock)
3153 * RETURNS: 0 when ATAPI DMA can be used
3156 int ata_check_atapi_dma(struct ata_queued_cmd *qc)
3158 struct ata_port *ap = qc->ap;
3159 int rc = 0; /* Assume ATAPI DMA is OK by default */
3161 if (ap->ops->check_atapi_dma)
3162 rc = ap->ops->check_atapi_dma(qc);
3167 * ata_qc_prep - Prepare taskfile for submission
3168 * @qc: Metadata associated with taskfile to be prepared
3170 * Prepare ATA taskfile for submission.
3173 * spin_lock_irqsave(host_set lock)
3175 void ata_qc_prep(struct ata_queued_cmd *qc)
3177 if (!(qc->flags & ATA_QCFLAG_DMAMAP))
3183 void ata_noop_qc_prep(struct ata_queued_cmd *qc) { }
3186 * ata_sg_init_one - Associate command with memory buffer
3187 * @qc: Command to be associated
3188 * @buf: Memory buffer
3189 * @buflen: Length of memory buffer, in bytes.
3191 * Initialize the data-related elements of queued_cmd @qc
3192 * to point to a single memory buffer, @buf of byte length @buflen.
3195 * spin_lock_irqsave(host_set lock)
3198 void ata_sg_init_one(struct ata_queued_cmd *qc, void *buf, unsigned int buflen)
3200 struct scatterlist *sg;
3202 qc->flags |= ATA_QCFLAG_SINGLE;
3204 memset(&qc->sgent, 0, sizeof(qc->sgent));
3205 qc->__sg = &qc->sgent;
3207 qc->orig_n_elem = 1;
3211 sg_init_one(sg, buf, buflen);
3215 * ata_sg_init - Associate command with scatter-gather table.
3216 * @qc: Command to be associated
3217 * @sg: Scatter-gather table.
3218 * @n_elem: Number of elements in s/g table.
3220 * Initialize the data-related elements of queued_cmd @qc
3221 * to point to a scatter-gather table @sg, containing @n_elem
3225 * spin_lock_irqsave(host_set lock)
3228 void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
3229 unsigned int n_elem)
3231 qc->flags |= ATA_QCFLAG_SG;
3233 qc->n_elem = n_elem;
3234 qc->orig_n_elem = n_elem;
3238 * ata_sg_setup_one - DMA-map the memory buffer associated with a command.
3239 * @qc: Command with memory buffer to be mapped.
3241 * DMA-map the memory buffer associated with queued_cmd @qc.
3244 * spin_lock_irqsave(host_set lock)
3247 * Zero on success, negative on error.
3250 static int ata_sg_setup_one(struct ata_queued_cmd *qc)
3252 struct ata_port *ap = qc->ap;
3253 int dir = qc->dma_dir;
3254 struct scatterlist *sg = qc->__sg;
3255 dma_addr_t dma_address;
3258 /* we must lengthen transfers to end on a 32-bit boundary */
3259 qc->pad_len = sg->length & 3;
3261 void *pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ);
3262 struct scatterlist *psg = &qc->pad_sgent;
3264 WARN_ON(qc->dev->class != ATA_DEV_ATAPI);
3266 memset(pad_buf, 0, ATA_DMA_PAD_SZ);
3268 if (qc->tf.flags & ATA_TFLAG_WRITE)
3269 memcpy(pad_buf, qc->buf_virt + sg->length - qc->pad_len,
3272 sg_dma_address(psg) = ap->pad_dma + (qc->tag * ATA_DMA_PAD_SZ);
3273 sg_dma_len(psg) = ATA_DMA_PAD_SZ;
3275 sg->length -= qc->pad_len;
3276 if (sg->length == 0)
3279 DPRINTK("padding done, sg->length=%u pad_len=%u\n",
3280 sg->length, qc->pad_len);
3288 dma_address = dma_map_single(ap->dev, qc->buf_virt,
3290 if (dma_mapping_error(dma_address)) {
3292 sg->length += qc->pad_len;
3296 sg_dma_address(sg) = dma_address;
3297 sg_dma_len(sg) = sg->length;
3300 DPRINTK("mapped buffer of %d bytes for %s\n", sg_dma_len(sg),
3301 qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read");
3307 * ata_sg_setup - DMA-map the scatter-gather table associated with a command.
3308 * @qc: Command with scatter-gather table to be mapped.
3310 * DMA-map the scatter-gather table associated with queued_cmd @qc.
3313 * spin_lock_irqsave(host_set lock)
3316 * Zero on success, negative on error.
3320 static int ata_sg_setup(struct ata_queued_cmd *qc)
3322 struct ata_port *ap = qc->ap;
3323 struct scatterlist *sg = qc->__sg;
3324 struct scatterlist *lsg = &sg[qc->n_elem - 1];
3325 int n_elem, pre_n_elem, dir, trim_sg = 0;
3327 VPRINTK("ENTER, ata%u\n", ap->id);
3328 WARN_ON(!(qc->flags & ATA_QCFLAG_SG));
3330 /* we must lengthen transfers to end on a 32-bit boundary */
3331 qc->pad_len = lsg->length & 3;
3333 void *pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ);
3334 struct scatterlist *psg = &qc->pad_sgent;
3335 unsigned int offset;
3337 WARN_ON(qc->dev->class != ATA_DEV_ATAPI);
3339 memset(pad_buf, 0, ATA_DMA_PAD_SZ);
3342 * psg->page/offset are used to copy to-be-written
3343 * data in this function or read data in ata_sg_clean.
3345 offset = lsg->offset + lsg->length - qc->pad_len;
3346 psg->page = nth_page(lsg->page, offset >> PAGE_SHIFT);
3347 psg->offset = offset_in_page(offset);
3349 if (qc->tf.flags & ATA_TFLAG_WRITE) {
3350 void *addr = kmap_atomic(psg->page, KM_IRQ0);
3351 memcpy(pad_buf, addr + psg->offset, qc->pad_len);
3352 kunmap_atomic(addr, KM_IRQ0);
3355 sg_dma_address(psg) = ap->pad_dma + (qc->tag * ATA_DMA_PAD_SZ);
3356 sg_dma_len(psg) = ATA_DMA_PAD_SZ;
3358 lsg->length -= qc->pad_len;
3359 if (lsg->length == 0)
3362 DPRINTK("padding done, sg[%d].length=%u pad_len=%u\n",
3363 qc->n_elem - 1, lsg->length, qc->pad_len);
3366 pre_n_elem = qc->n_elem;
3367 if (trim_sg && pre_n_elem)
3376 n_elem = dma_map_sg(ap->dev, sg, pre_n_elem, dir);
3378 /* restore last sg */
3379 lsg->length += qc->pad_len;
3383 DPRINTK("%d sg elements mapped\n", n_elem);
3386 qc->n_elem = n_elem;
3392 * ata_poll_qc_complete - turn irq back on and finish qc
3393 * @qc: Command to complete
3394 * @err_mask: ATA status register content
3397 * None. (grabs host lock)
3400 void ata_poll_qc_complete(struct ata_queued_cmd *qc)
3402 struct ata_port *ap = qc->ap;
3403 unsigned long flags;
3405 spin_lock_irqsave(&ap->host_set->lock, flags);
3406 ap->flags &= ~ATA_FLAG_NOINTR;
3408 ata_qc_complete(qc);
3409 spin_unlock_irqrestore(&ap->host_set->lock, flags);
3413 * ata_pio_poll - poll using PIO, depending on current state
3414 * @qc: qc in progress
3417 * None. (executing in kernel thread context)
3420 * timeout value to use
3422 static unsigned long ata_pio_poll(struct ata_queued_cmd *qc)
3424 struct ata_port *ap = qc->ap;
3426 unsigned int poll_state = HSM_ST_UNKNOWN;
3427 unsigned int reg_state = HSM_ST_UNKNOWN;
3429 switch (ap->hsm_task_state) {
3432 poll_state = HSM_ST_POLL;
3436 case HSM_ST_LAST_POLL:
3437 poll_state = HSM_ST_LAST_POLL;
3438 reg_state = HSM_ST_LAST;
3445 status = ata_chk_status(ap);
3446 if (status & ATA_BUSY) {
3447 if (time_after(jiffies, ap->pio_task_timeout)) {
3448 qc->err_mask |= AC_ERR_TIMEOUT;
3449 ap->hsm_task_state = HSM_ST_TMOUT;
3452 ap->hsm_task_state = poll_state;
3453 return ATA_SHORT_PAUSE;
3456 ap->hsm_task_state = reg_state;
3461 * ata_pio_complete - check if drive is busy or idle
3462 * @qc: qc to complete
3465 * None. (executing in kernel thread context)
3468 * Non-zero if qc completed, zero otherwise.
3470 static int ata_pio_complete(struct ata_queued_cmd *qc)
3472 struct ata_port *ap = qc->ap;
3476 * This is purely heuristic. This is a fast path. Sometimes when
3477 * we enter, BSY will be cleared in a chk-status or two. If not,
3478 * the drive is probably seeking or something. Snooze for a couple
3479 * msecs, then chk-status again. If still busy, fall back to
3480 * HSM_ST_POLL state.
3482 drv_stat = ata_busy_wait(ap, ATA_BUSY, 10);
3483 if (drv_stat & ATA_BUSY) {
3485 drv_stat = ata_busy_wait(ap, ATA_BUSY, 10);
3486 if (drv_stat & ATA_BUSY) {
3487 ap->hsm_task_state = HSM_ST_LAST_POLL;
3488 ap->pio_task_timeout = jiffies + ATA_TMOUT_PIO;
3493 drv_stat = ata_wait_idle(ap);
3494 if (!ata_ok(drv_stat)) {
3495 qc->err_mask |= __ac_err_mask(drv_stat);
3496 ap->hsm_task_state = HSM_ST_ERR;
3500 ap->hsm_task_state = HSM_ST_IDLE;
3502 WARN_ON(qc->err_mask);
3503 ata_poll_qc_complete(qc);
3505 /* another command may start at this point */
3512 * swap_buf_le16 - swap halves of 16-bit words in place
3513 * @buf: Buffer to swap
3514 * @buf_words: Number of 16-bit words in buffer.
3516 * Swap halves of 16-bit words if needed to convert from
3517 * little-endian byte order to native cpu byte order, or
3521 * Inherited from caller.
3523 void swap_buf_le16(u16 *buf, unsigned int buf_words)
3528 for (i = 0; i < buf_words; i++)
3529 buf[i] = le16_to_cpu(buf[i]);
3530 #endif /* __BIG_ENDIAN */
3534 * ata_mmio_data_xfer - Transfer data by MMIO
3535 * @ap: port to read/write
3537 * @buflen: buffer length
3538 * @write_data: read/write
3540 * Transfer data from/to the device data register by MMIO.
3543 * Inherited from caller.
3546 static void ata_mmio_data_xfer(struct ata_port *ap, unsigned char *buf,
3547 unsigned int buflen, int write_data)
3550 unsigned int words = buflen >> 1;
3551 u16 *buf16 = (u16 *) buf;
3552 void __iomem *mmio = (void __iomem *)ap->ioaddr.data_addr;
3554 /* Transfer multiple of 2 bytes */
3556 for (i = 0; i < words; i++)
3557 writew(le16_to_cpu(buf16[i]), mmio);
3559 for (i = 0; i < words; i++)
3560 buf16[i] = cpu_to_le16(readw(mmio));
3563 /* Transfer trailing 1 byte, if any. */
3564 if (unlikely(buflen & 0x01)) {
3565 u16 align_buf[1] = { 0 };
3566 unsigned char *trailing_buf = buf + buflen - 1;
3569 memcpy(align_buf, trailing_buf, 1);
3570 writew(le16_to_cpu(align_buf[0]), mmio);
3572 align_buf[0] = cpu_to_le16(readw(mmio));
3573 memcpy(trailing_buf, align_buf, 1);
3579 * ata_pio_data_xfer - Transfer data by PIO
3580 * @ap: port to read/write
3582 * @buflen: buffer length
3583 * @write_data: read/write
3585 * Transfer data from/to the device data register by PIO.
3588 * Inherited from caller.
3591 static void ata_pio_data_xfer(struct ata_port *ap, unsigned char *buf,
3592 unsigned int buflen, int write_data)
3594 unsigned int words = buflen >> 1;
3596 /* Transfer multiple of 2 bytes */
3598 outsw(ap->ioaddr.data_addr, buf, words);
3600 insw(ap->ioaddr.data_addr, buf, words);
3602 /* Transfer trailing 1 byte, if any. */
3603 if (unlikely(buflen & 0x01)) {
3604 u16 align_buf[1] = { 0 };
3605 unsigned char *trailing_buf = buf + buflen - 1;
3608 memcpy(align_buf, trailing_buf, 1);
3609 outw(le16_to_cpu(align_buf[0]), ap->ioaddr.data_addr);
3611 align_buf[0] = cpu_to_le16(inw(ap->ioaddr.data_addr));
3612 memcpy(trailing_buf, align_buf, 1);
3618 * ata_data_xfer - Transfer data from/to the data register.
3619 * @ap: port to read/write
3621 * @buflen: buffer length
3622 * @do_write: read/write
3624 * Transfer data from/to the device data register.
3627 * Inherited from caller.
3630 static void ata_data_xfer(struct ata_port *ap, unsigned char *buf,
3631 unsigned int buflen, int do_write)
3633 /* Make the crap hardware pay the costs not the good stuff */
3634 if (unlikely(ap->flags & ATA_FLAG_IRQ_MASK)) {
3635 unsigned long flags;
3636 local_irq_save(flags);
3637 if (ap->flags & ATA_FLAG_MMIO)
3638 ata_mmio_data_xfer(ap, buf, buflen, do_write);
3640 ata_pio_data_xfer(ap, buf, buflen, do_write);
3641 local_irq_restore(flags);
3643 if (ap->flags & ATA_FLAG_MMIO)
3644 ata_mmio_data_xfer(ap, buf, buflen, do_write);
3646 ata_pio_data_xfer(ap, buf, buflen, do_write);
3651 * ata_pio_sector - Transfer ATA_SECT_SIZE (512 bytes) of data.
3652 * @qc: Command on going
3654 * Transfer ATA_SECT_SIZE of data from/to the ATA device.
3657 * Inherited from caller.
3660 static void ata_pio_sector(struct ata_queued_cmd *qc)
3662 int do_write = (qc->tf.flags & ATA_TFLAG_WRITE);
3663 struct scatterlist *sg = qc->__sg;
3664 struct ata_port *ap = qc->ap;
3666 unsigned int offset;
3669 if (qc->cursect == (qc->nsect - 1))
3670 ap->hsm_task_state = HSM_ST_LAST;
3672 page = sg[qc->cursg].page;
3673 offset = sg[qc->cursg].offset + qc->cursg_ofs * ATA_SECT_SIZE;
3675 /* get the current page and offset */
3676 page = nth_page(page, (offset >> PAGE_SHIFT));
3677 offset %= PAGE_SIZE;
3679 buf = kmap(page) + offset;
3684 if ((qc->cursg_ofs * ATA_SECT_SIZE) == (&sg[qc->cursg])->length) {
3689 DPRINTK("data %s\n", qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read");
3691 /* do the actual data transfer */
3692 do_write = (qc->tf.flags & ATA_TFLAG_WRITE);
3693 ata_data_xfer(ap, buf, ATA_SECT_SIZE, do_write);
3699 * __atapi_pio_bytes - Transfer data from/to the ATAPI device.
3700 * @qc: Command on going
3701 * @bytes: number of bytes
3703 * Transfer Transfer data from/to the ATAPI device.
3706 * Inherited from caller.
3710 static void __atapi_pio_bytes(struct ata_queued_cmd *qc, unsigned int bytes)
3712 int do_write = (qc->tf.flags & ATA_TFLAG_WRITE);
3713 struct scatterlist *sg = qc->__sg;
3714 struct ata_port *ap = qc->ap;
3717 unsigned int offset, count;
3719 if (qc->curbytes + bytes >= qc->nbytes)
3720 ap->hsm_task_state = HSM_ST_LAST;
3723 if (unlikely(qc->cursg >= qc->n_elem)) {
3725 * The end of qc->sg is reached and the device expects
3726 * more data to transfer. In order not to overrun qc->sg
3727 * and fulfill length specified in the byte count register,
3728 * - for read case, discard trailing data from the device
3729 * - for write case, padding zero data to the device
3731 u16 pad_buf[1] = { 0 };
3732 unsigned int words = bytes >> 1;
3735 if (words) /* warning if bytes > 1 */
3736 printk(KERN_WARNING "ata%u: %u bytes trailing data\n",
3739 for (i = 0; i < words; i++)
3740 ata_data_xfer(ap, (unsigned char*)pad_buf, 2, do_write);
3742 ap->hsm_task_state = HSM_ST_LAST;
3746 sg = &qc->__sg[qc->cursg];
3749 offset = sg->offset + qc->cursg_ofs;
3751 /* get the current page and offset */
3752 page = nth_page(page, (offset >> PAGE_SHIFT));
3753 offset %= PAGE_SIZE;
3755 /* don't overrun current sg */
3756 count = min(sg->length - qc->cursg_ofs, bytes);
3758 /* don't cross page boundaries */
3759 count = min(count, (unsigned int)PAGE_SIZE - offset);
3761 buf = kmap(page) + offset;
3764 qc->curbytes += count;
3765 qc->cursg_ofs += count;
3767 if (qc->cursg_ofs == sg->length) {
3772 DPRINTK("data %s\n", qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read");
3774 /* do the actual data transfer */
3775 ata_data_xfer(ap, buf, count, do_write);
3784 * atapi_pio_bytes - Transfer data from/to the ATAPI device.
3785 * @qc: Command on going
3787 * Transfer Transfer data from/to the ATAPI device.
3790 * Inherited from caller.
3793 static void atapi_pio_bytes(struct ata_queued_cmd *qc)
3795 struct ata_port *ap = qc->ap;
3796 struct ata_device *dev = qc->dev;
3797 unsigned int ireason, bc_lo, bc_hi, bytes;
3798 int i_write, do_write = (qc->tf.flags & ATA_TFLAG_WRITE) ? 1 : 0;
3800 ap->ops->tf_read(ap, &qc->tf);
3801 ireason = qc->tf.nsect;
3802 bc_lo = qc->tf.lbam;
3803 bc_hi = qc->tf.lbah;
3804 bytes = (bc_hi << 8) | bc_lo;
3806 /* shall be cleared to zero, indicating xfer of data */
3807 if (ireason & (1 << 0))
3810 /* make sure transfer direction matches expected */
3811 i_write = ((ireason & (1 << 1)) == 0) ? 1 : 0;
3812 if (do_write != i_write)
3815 __atapi_pio_bytes(qc, bytes);
3820 printk(KERN_INFO "ata%u: dev %u: ATAPI check failed\n",
3821 ap->id, dev->devno);
3822 qc->err_mask |= AC_ERR_HSM;
3823 ap->hsm_task_state = HSM_ST_ERR;
3827 * ata_pio_block - start PIO on a block
3828 * @qc: qc to transfer block for
3831 * None. (executing in kernel thread context)
3833 static void ata_pio_block(struct ata_queued_cmd *qc)
3835 struct ata_port *ap = qc->ap;
3839 * This is purely heuristic. This is a fast path.
3840 * Sometimes when we enter, BSY will be cleared in
3841 * a chk-status or two. If not, the drive is probably seeking
3842 * or something. Snooze for a couple msecs, then
3843 * chk-status again. If still busy, fall back to
3844 * HSM_ST_POLL state.
3846 status = ata_busy_wait(ap, ATA_BUSY, 5);
3847 if (status & ATA_BUSY) {
3849 status = ata_busy_wait(ap, ATA_BUSY, 10);
3850 if (status & ATA_BUSY) {
3851 ap->hsm_task_state = HSM_ST_POLL;
3852 ap->pio_task_timeout = jiffies + ATA_TMOUT_PIO;
3858 if (status & (ATA_ERR | ATA_DF)) {
3859 qc->err_mask |= AC_ERR_DEV;
3860 ap->hsm_task_state = HSM_ST_ERR;
3864 /* transfer data if any */
3865 if (is_atapi_taskfile(&qc->tf)) {
3866 /* DRQ=0 means no more data to transfer */
3867 if ((status & ATA_DRQ) == 0) {
3868 ap->hsm_task_state = HSM_ST_LAST;
3872 atapi_pio_bytes(qc);
3874 /* handle BSY=0, DRQ=0 as error */
3875 if ((status & ATA_DRQ) == 0) {
3876 qc->err_mask |= AC_ERR_HSM;
3877 ap->hsm_task_state = HSM_ST_ERR;
3885 static void ata_pio_error(struct ata_queued_cmd *qc)
3887 struct ata_port *ap = qc->ap;
3889 if (qc->tf.command != ATA_CMD_PACKET)
3890 printk(KERN_WARNING "ata%u: dev %u PIO error\n",
3891 ap->id, qc->dev->devno);
3893 /* make sure qc->err_mask is available to
3894 * know what's wrong and recover
3896 WARN_ON(qc->err_mask == 0);
3898 ap->hsm_task_state = HSM_ST_IDLE;
3900 ata_poll_qc_complete(qc);
3903 static void ata_pio_task(void *_data)
3905 struct ata_queued_cmd *qc = _data;
3906 struct ata_port *ap = qc->ap;
3907 unsigned long timeout;
3914 switch (ap->hsm_task_state) {
3923 qc_completed = ata_pio_complete(qc);
3927 case HSM_ST_LAST_POLL:
3928 timeout = ata_pio_poll(qc);
3938 ata_port_queue_task(ap, ata_pio_task, qc, timeout);
3939 else if (!qc_completed)
3944 * atapi_packet_task - Write CDB bytes to hardware
3945 * @_data: qc in progress
3947 * When device has indicated its readiness to accept
3948 * a CDB, this function is called. Send the CDB.
3949 * If DMA is to be performed, exit immediately.
3950 * Otherwise, we are in polling mode, so poll
3951 * status under operation succeeds or fails.
3954 * Kernel thread context (may sleep)
3956 static void atapi_packet_task(void *_data)
3958 struct ata_queued_cmd *qc = _data;
3959 struct ata_port *ap = qc->ap;
3962 /* sleep-wait for BSY to clear */
3963 DPRINTK("busy wait\n");
3964 if (ata_busy_sleep(ap, ATA_TMOUT_CDB_QUICK, ATA_TMOUT_CDB)) {
3965 qc->err_mask |= AC_ERR_TIMEOUT;
3969 /* make sure DRQ is set */
3970 status = ata_chk_status(ap);
3971 if ((status & (ATA_BUSY | ATA_DRQ)) != ATA_DRQ) {
3972 qc->err_mask |= AC_ERR_HSM;
3977 DPRINTK("send cdb\n");
3978 WARN_ON(qc->dev->cdb_len < 12);
3980 if (qc->tf.protocol == ATA_PROT_ATAPI_DMA ||
3981 qc->tf.protocol == ATA_PROT_ATAPI_NODATA) {
3982 unsigned long flags;
3984 /* Once we're done issuing command and kicking bmdma,
3985 * irq handler takes over. To not lose irq, we need
3986 * to clear NOINTR flag before sending cdb, but
3987 * interrupt handler shouldn't be invoked before we're
3988 * finished. Hence, the following locking.
3990 spin_lock_irqsave(&ap->host_set->lock, flags);
3991 ap->flags &= ~ATA_FLAG_NOINTR;
3992 ata_data_xfer(ap, qc->cdb, qc->dev->cdb_len, 1);
3993 if (qc->tf.protocol == ATA_PROT_ATAPI_DMA)
3994 ap->ops->bmdma_start(qc); /* initiate bmdma */
3995 spin_unlock_irqrestore(&ap->host_set->lock, flags);
3997 ata_data_xfer(ap, qc->cdb, qc->dev->cdb_len, 1);
3999 /* PIO commands are handled by polling */
4000 ap->hsm_task_state = HSM_ST;
4001 ata_port_queue_task(ap, ata_pio_task, qc, 0);
4007 ata_poll_qc_complete(qc);
4011 * ata_qc_new - Request an available ATA command, for queueing
4012 * @ap: Port associated with device @dev
4013 * @dev: Device from whom we request an available command structure
4019 static struct ata_queued_cmd *ata_qc_new(struct ata_port *ap)
4021 struct ata_queued_cmd *qc = NULL;
4024 for (i = 0; i < ATA_MAX_QUEUE; i++)
4025 if (!test_and_set_bit(i, &ap->qactive)) {
4026 qc = ata_qc_from_tag(ap, i);
4037 * ata_qc_new_init - Request an available ATA command, and initialize it
4038 * @dev: Device from whom we request an available command structure
4044 struct ata_queued_cmd *ata_qc_new_init(struct ata_device *dev)
4046 struct ata_port *ap = dev->ap;
4047 struct ata_queued_cmd *qc;
4049 qc = ata_qc_new(ap);
4062 * ata_qc_free - free unused ata_queued_cmd
4063 * @qc: Command to complete
4065 * Designed to free unused ata_queued_cmd object
4066 * in case something prevents using it.
4069 * spin_lock_irqsave(host_set lock)
4071 void ata_qc_free(struct ata_queued_cmd *qc)
4073 struct ata_port *ap = qc->ap;
4076 WARN_ON(qc == NULL); /* ata_qc_from_tag _might_ return NULL */
4080 if (likely(ata_tag_valid(tag))) {
4081 qc->tag = ATA_TAG_POISON;
4082 clear_bit(tag, &ap->qactive);
4086 void __ata_qc_complete(struct ata_queued_cmd *qc)
4088 WARN_ON(qc == NULL); /* ata_qc_from_tag _might_ return NULL */
4089 WARN_ON(!(qc->flags & ATA_QCFLAG_ACTIVE));
4091 if (likely(qc->flags & ATA_QCFLAG_DMAMAP))
4094 /* command should be marked inactive atomically with qc completion */
4095 qc->ap->active_tag = ATA_TAG_POISON;
4097 /* atapi: mark qc as inactive to prevent the interrupt handler
4098 * from completing the command twice later, before the error handler
4099 * is called. (when rc != 0 and atapi request sense is needed)
4101 qc->flags &= ~ATA_QCFLAG_ACTIVE;
4103 /* call completion callback */
4104 qc->complete_fn(qc);
4107 static inline int ata_should_dma_map(struct ata_queued_cmd *qc)
4109 struct ata_port *ap = qc->ap;
4111 switch (qc->tf.protocol) {
4113 case ATA_PROT_ATAPI_DMA:
4116 case ATA_PROT_ATAPI:
4118 if (ap->flags & ATA_FLAG_PIO_DMA)
4131 * ata_qc_issue - issue taskfile to device
4132 * @qc: command to issue to device
4134 * Prepare an ATA command to submission to device.
4135 * This includes mapping the data into a DMA-able
4136 * area, filling in the S/G table, and finally
4137 * writing the taskfile to hardware, starting the command.
4140 * spin_lock_irqsave(host_set lock)
4142 void ata_qc_issue(struct ata_queued_cmd *qc)
4144 struct ata_port *ap = qc->ap;
4146 qc->ap->active_tag = qc->tag;
4147 qc->flags |= ATA_QCFLAG_ACTIVE;
4149 if (ata_should_dma_map(qc)) {
4150 if (qc->flags & ATA_QCFLAG_SG) {
4151 if (ata_sg_setup(qc))
4153 } else if (qc->flags & ATA_QCFLAG_SINGLE) {
4154 if (ata_sg_setup_one(qc))
4158 qc->flags &= ~ATA_QCFLAG_DMAMAP;
4161 ap->ops->qc_prep(qc);
4163 qc->err_mask |= ap->ops->qc_issue(qc);
4164 if (unlikely(qc->err_mask))
4169 qc->flags &= ~ATA_QCFLAG_DMAMAP;
4170 qc->err_mask |= AC_ERR_SYSTEM;
4172 ata_qc_complete(qc);
4176 * ata_qc_issue_prot - issue taskfile to device in proto-dependent manner
4177 * @qc: command to issue to device
4179 * Using various libata functions and hooks, this function
4180 * starts an ATA command. ATA commands are grouped into
4181 * classes called "protocols", and issuing each type of protocol
4182 * is slightly different.
4184 * May be used as the qc_issue() entry in ata_port_operations.
4187 * spin_lock_irqsave(host_set lock)
4190 * Zero on success, AC_ERR_* mask on failure
4193 unsigned int ata_qc_issue_prot(struct ata_queued_cmd *qc)
4195 struct ata_port *ap = qc->ap;
4197 ata_dev_select(ap, qc->dev->devno, 1, 0);
4199 switch (qc->tf.protocol) {
4200 case ATA_PROT_NODATA:
4201 ata_tf_to_host(ap, &qc->tf);
4205 ap->ops->tf_load(ap, &qc->tf); /* load tf registers */
4206 ap->ops->bmdma_setup(qc); /* set up bmdma */
4207 ap->ops->bmdma_start(qc); /* initiate bmdma */
4210 case ATA_PROT_PIO: /* load tf registers, initiate polling pio */
4211 ata_qc_set_polling(qc);
4212 ata_tf_to_host(ap, &qc->tf);
4213 ap->hsm_task_state = HSM_ST;
4214 ata_port_queue_task(ap, ata_pio_task, qc, 0);
4217 case ATA_PROT_ATAPI:
4218 ata_qc_set_polling(qc);
4219 ata_tf_to_host(ap, &qc->tf);
4220 ata_port_queue_task(ap, atapi_packet_task, qc, 0);
4223 case ATA_PROT_ATAPI_NODATA:
4224 ap->flags |= ATA_FLAG_NOINTR;
4225 ata_tf_to_host(ap, &qc->tf);
4226 ata_port_queue_task(ap, atapi_packet_task, qc, 0);
4229 case ATA_PROT_ATAPI_DMA:
4230 ap->flags |= ATA_FLAG_NOINTR;
4231 ap->ops->tf_load(ap, &qc->tf); /* load tf registers */
4232 ap->ops->bmdma_setup(qc); /* set up bmdma */
4233 ata_port_queue_task(ap, atapi_packet_task, qc, 0);
4238 return AC_ERR_SYSTEM;
4245 * ata_host_intr - Handle host interrupt for given (port, task)
4246 * @ap: Port on which interrupt arrived (possibly...)
4247 * @qc: Taskfile currently active in engine
4249 * Handle host interrupt for given queued command. Currently,
4250 * only DMA interrupts are handled. All other commands are
4251 * handled via polling with interrupts disabled (nIEN bit).
4254 * spin_lock_irqsave(host_set lock)
4257 * One if interrupt was handled, zero if not (shared irq).
4260 inline unsigned int ata_host_intr (struct ata_port *ap,
4261 struct ata_queued_cmd *qc)
4263 u8 status, host_stat;
4265 switch (qc->tf.protocol) {
4268 case ATA_PROT_ATAPI_DMA:
4269 case ATA_PROT_ATAPI:
4270 /* check status of DMA engine */
4271 host_stat = ap->ops->bmdma_status(ap);
4272 VPRINTK("ata%u: host_stat 0x%X\n", ap->id, host_stat);
4274 /* if it's not our irq... */
4275 if (!(host_stat & ATA_DMA_INTR))
4278 /* before we do anything else, clear DMA-Start bit */
4279 ap->ops->bmdma_stop(qc);
4283 case ATA_PROT_ATAPI_NODATA:
4284 case ATA_PROT_NODATA:
4285 /* check altstatus */
4286 status = ata_altstatus(ap);
4287 if (status & ATA_BUSY)
4290 /* check main status, clearing INTRQ */
4291 status = ata_chk_status(ap);
4292 if (unlikely(status & ATA_BUSY))
4294 DPRINTK("ata%u: protocol %d (dev_stat 0x%X)\n",
4295 ap->id, qc->tf.protocol, status);
4297 /* ack bmdma irq events */
4298 ap->ops->irq_clear(ap);
4300 /* complete taskfile transaction */
4301 qc->err_mask |= ac_err_mask(status);
4302 ata_qc_complete(qc);
4309 return 1; /* irq handled */
4312 ap->stats.idle_irq++;
4315 if ((ap->stats.idle_irq % 1000) == 0) {
4316 ata_irq_ack(ap, 0); /* debug trap */
4317 printk(KERN_WARNING "ata%d: irq trap\n", ap->id);
4321 return 0; /* irq not handled */
4325 * ata_interrupt - Default ATA host interrupt handler
4326 * @irq: irq line (unused)
4327 * @dev_instance: pointer to our ata_host_set information structure
4330 * Default interrupt handler for PCI IDE devices. Calls
4331 * ata_host_intr() for each port that is not disabled.
4334 * Obtains host_set lock during operation.
4337 * IRQ_NONE or IRQ_HANDLED.
4340 irqreturn_t ata_interrupt (int irq, void *dev_instance, struct pt_regs *regs)
4342 struct ata_host_set *host_set = dev_instance;
4344 unsigned int handled = 0;
4345 unsigned long flags;
4347 /* TODO: make _irqsave conditional on x86 PCI IDE legacy mode */
4348 spin_lock_irqsave(&host_set->lock, flags);
4350 for (i = 0; i < host_set->n_ports; i++) {
4351 struct ata_port *ap;
4353 ap = host_set->ports[i];
4355 !(ap->flags & (ATA_FLAG_DISABLED | ATA_FLAG_NOINTR))) {
4356 struct ata_queued_cmd *qc;
4358 qc = ata_qc_from_tag(ap, ap->active_tag);
4359 if (qc && (!(qc->tf.ctl & ATA_NIEN)) &&
4360 (qc->flags & ATA_QCFLAG_ACTIVE))
4361 handled |= ata_host_intr(ap, qc);
4365 spin_unlock_irqrestore(&host_set->lock, flags);
4367 return IRQ_RETVAL(handled);
4371 * sata_scr_valid - test whether SCRs are accessible
4372 * @ap: ATA port to test SCR accessibility for
4374 * Test whether SCRs are accessible for @ap.
4380 * 1 if SCRs are accessible, 0 otherwise.
4382 int sata_scr_valid(struct ata_port *ap)
4384 return ap->cbl == ATA_CBL_SATA && ap->ops->scr_read;
4388 * sata_scr_read - read SCR register of the specified port
4389 * @ap: ATA port to read SCR for
4391 * @val: Place to store read value
4393 * Read SCR register @reg of @ap into *@val. This function is
4394 * guaranteed to succeed if the cable type of the port is SATA
4395 * and the port implements ->scr_read.
4401 * 0 on success, negative errno on failure.
4403 int sata_scr_read(struct ata_port *ap, int reg, u32 *val)
4405 if (sata_scr_valid(ap)) {
4406 *val = ap->ops->scr_read(ap, reg);
4413 * sata_scr_write - write SCR register of the specified port
4414 * @ap: ATA port to write SCR for
4415 * @reg: SCR to write
4416 * @val: value to write
4418 * Write @val to SCR register @reg of @ap. This function is
4419 * guaranteed to succeed if the cable type of the port is SATA
4420 * and the port implements ->scr_read.
4426 * 0 on success, negative errno on failure.
4428 int sata_scr_write(struct ata_port *ap, int reg, u32 val)
4430 if (sata_scr_valid(ap)) {
4431 ap->ops->scr_write(ap, reg, val);
4438 * sata_scr_write_flush - write SCR register of the specified port and flush
4439 * @ap: ATA port to write SCR for
4440 * @reg: SCR to write
4441 * @val: value to write
4443 * This function is identical to sata_scr_write() except that this
4444 * function performs flush after writing to the register.
4450 * 0 on success, negative errno on failure.
4452 int sata_scr_write_flush(struct ata_port *ap, int reg, u32 val)
4454 if (sata_scr_valid(ap)) {
4455 ap->ops->scr_write(ap, reg, val);
4456 ap->ops->scr_read(ap, reg);
4463 * ata_port_online - test whether the given port is online
4464 * @ap: ATA port to test
4466 * Test whether @ap is online. Note that this function returns 0
4467 * if online status of @ap cannot be obtained, so
4468 * ata_port_online(ap) != !ata_port_offline(ap).
4474 * 1 if the port online status is available and online.
4476 int ata_port_online(struct ata_port *ap)
4480 if (!sata_scr_read(ap, SCR_STATUS, &sstatus) && (sstatus & 0xf) == 0x3)
4486 * ata_port_offline - test whether the given port is offline
4487 * @ap: ATA port to test
4489 * Test whether @ap is offline. Note that this function returns
4490 * 0 if offline status of @ap cannot be obtained, so
4491 * ata_port_online(ap) != !ata_port_offline(ap).
4497 * 1 if the port offline status is available and offline.
4499 int ata_port_offline(struct ata_port *ap)
4503 if (!sata_scr_read(ap, SCR_STATUS, &sstatus) && (sstatus & 0xf) != 0x3)
4509 * Execute a 'simple' command, that only consists of the opcode 'cmd' itself,
4510 * without filling any other registers
4512 static int ata_do_simple_cmd(struct ata_device *dev, u8 cmd)
4514 struct ata_taskfile tf;
4517 ata_tf_init(dev, &tf);
4520 tf.flags |= ATA_TFLAG_DEVICE;
4521 tf.protocol = ATA_PROT_NODATA;
4523 err = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0);
4525 printk(KERN_ERR "%s: ata command failed: %d\n",
4531 static int ata_flush_cache(struct ata_device *dev)
4535 if (!ata_try_flush_cache(dev))
4538 if (ata_id_has_flush_ext(dev->id))
4539 cmd = ATA_CMD_FLUSH_EXT;
4541 cmd = ATA_CMD_FLUSH;
4543 return ata_do_simple_cmd(dev, cmd);
4546 static int ata_standby_drive(struct ata_device *dev)
4548 return ata_do_simple_cmd(dev, ATA_CMD_STANDBYNOW1);
4551 static int ata_start_drive(struct ata_device *dev)
4553 return ata_do_simple_cmd(dev, ATA_CMD_IDLEIMMEDIATE);
4557 * ata_device_resume - wakeup a previously suspended devices
4558 * @dev: the device to resume
4560 * Kick the drive back into action, by sending it an idle immediate
4561 * command and making sure its transfer mode matches between drive
4565 int ata_device_resume(struct ata_device *dev)
4567 struct ata_port *ap = dev->ap;
4569 if (ap->flags & ATA_FLAG_SUSPENDED) {
4570 struct ata_device *failed_dev;
4571 ap->flags &= ~ATA_FLAG_SUSPENDED;
4572 while (ata_set_mode(ap, &failed_dev))
4573 ata_dev_disable(failed_dev);
4575 if (!ata_dev_enabled(dev))
4577 if (dev->class == ATA_DEV_ATA)
4578 ata_start_drive(dev);
4584 * ata_device_suspend - prepare a device for suspend
4585 * @dev: the device to suspend
4587 * Flush the cache on the drive, if appropriate, then issue a
4588 * standbynow command.
4590 int ata_device_suspend(struct ata_device *dev, pm_message_t state)
4592 struct ata_port *ap = dev->ap;
4594 if (!ata_dev_enabled(dev))
4596 if (dev->class == ATA_DEV_ATA)
4597 ata_flush_cache(dev);
4599 if (state.event != PM_EVENT_FREEZE)
4600 ata_standby_drive(dev);
4601 ap->flags |= ATA_FLAG_SUSPENDED;
4606 * ata_port_start - Set port up for dma.
4607 * @ap: Port to initialize
4609 * Called just after data structures for each port are
4610 * initialized. Allocates space for PRD table.
4612 * May be used as the port_start() entry in ata_port_operations.
4615 * Inherited from caller.
4618 int ata_port_start (struct ata_port *ap)
4620 struct device *dev = ap->dev;
4623 ap->prd = dma_alloc_coherent(dev, ATA_PRD_TBL_SZ, &ap->prd_dma, GFP_KERNEL);
4627 rc = ata_pad_alloc(ap, dev);
4629 dma_free_coherent(dev, ATA_PRD_TBL_SZ, ap->prd, ap->prd_dma);
4633 DPRINTK("prd alloc, virt %p, dma %llx\n", ap->prd, (unsigned long long) ap->prd_dma);
4640 * ata_port_stop - Undo ata_port_start()
4641 * @ap: Port to shut down
4643 * Frees the PRD table.
4645 * May be used as the port_stop() entry in ata_port_operations.
4648 * Inherited from caller.
4651 void ata_port_stop (struct ata_port *ap)
4653 struct device *dev = ap->dev;
4655 dma_free_coherent(dev, ATA_PRD_TBL_SZ, ap->prd, ap->prd_dma);
4656 ata_pad_free(ap, dev);
4659 void ata_host_stop (struct ata_host_set *host_set)
4661 if (host_set->mmio_base)
4662 iounmap(host_set->mmio_base);
4667 * ata_host_remove - Unregister SCSI host structure with upper layers
4668 * @ap: Port to unregister
4669 * @do_unregister: 1 if we fully unregister, 0 to just stop the port
4672 * Inherited from caller.
4675 static void ata_host_remove(struct ata_port *ap, unsigned int do_unregister)
4677 struct Scsi_Host *sh = ap->host;
4682 scsi_remove_host(sh);
4684 ap->ops->port_stop(ap);
4688 * ata_host_init - Initialize an ata_port structure
4689 * @ap: Structure to initialize
4690 * @host: associated SCSI mid-layer structure
4691 * @host_set: Collection of hosts to which @ap belongs
4692 * @ent: Probe information provided by low-level driver
4693 * @port_no: Port number associated with this ata_port
4695 * Initialize a new ata_port structure, and its associated
4699 * Inherited from caller.
4702 static void ata_host_init(struct ata_port *ap, struct Scsi_Host *host,
4703 struct ata_host_set *host_set,
4704 const struct ata_probe_ent *ent, unsigned int port_no)
4710 host->max_channel = 1;
4711 host->unique_id = ata_unique_id++;
4712 host->max_cmd_len = 12;
4714 ap->flags = ATA_FLAG_DISABLED;
4715 ap->id = host->unique_id;
4717 ap->ctl = ATA_DEVCTL_OBS;
4718 ap->host_set = host_set;
4720 ap->port_no = port_no;
4722 ent->legacy_mode ? ent->hard_port_no : port_no;
4723 ap->pio_mask = ent->pio_mask;
4724 ap->mwdma_mask = ent->mwdma_mask;
4725 ap->udma_mask = ent->udma_mask;
4726 ap->flags |= ent->host_flags;
4727 ap->ops = ent->port_ops;
4728 ap->sata_spd_limit = UINT_MAX;
4729 ap->active_tag = ATA_TAG_POISON;
4730 ap->last_ctl = 0xFF;
4732 INIT_WORK(&ap->port_task, NULL, NULL);
4733 INIT_LIST_HEAD(&ap->eh_done_q);
4735 /* set cable type */
4736 ap->cbl = ATA_CBL_NONE;
4737 if (ap->flags & ATA_FLAG_SATA)
4738 ap->cbl = ATA_CBL_SATA;
4740 for (i = 0; i < ATA_MAX_DEVICES; i++) {
4741 struct ata_device *dev = &ap->device[i];
4744 dev->pio_mask = UINT_MAX;
4745 dev->mwdma_mask = UINT_MAX;
4746 dev->udma_mask = UINT_MAX;
4750 ap->stats.unhandled_irq = 1;
4751 ap->stats.idle_irq = 1;
4754 memcpy(&ap->ioaddr, &ent->port[port_no], sizeof(struct ata_ioports));
4758 * ata_host_add - Attach low-level ATA driver to system
4759 * @ent: Information provided by low-level driver
4760 * @host_set: Collections of ports to which we add
4761 * @port_no: Port number associated with this host
4763 * Attach low-level ATA driver to system.
4766 * PCI/etc. bus probe sem.
4769 * New ata_port on success, for NULL on error.
4772 static struct ata_port * ata_host_add(const struct ata_probe_ent *ent,
4773 struct ata_host_set *host_set,
4774 unsigned int port_no)
4776 struct Scsi_Host *host;
4777 struct ata_port *ap;
4782 if (!ent->port_ops->probe_reset &&
4783 !(ent->host_flags & (ATA_FLAG_SATA_RESET | ATA_FLAG_SRST))) {
4784 printk(KERN_ERR "ata%u: no reset mechanism available\n",
4789 host = scsi_host_alloc(ent->sht, sizeof(struct ata_port));
4793 host->transportt = &ata_scsi_transport_template;
4795 ap = ata_shost_to_port(host);
4797 ata_host_init(ap, host, host_set, ent, port_no);
4799 rc = ap->ops->port_start(ap);
4806 scsi_host_put(host);
4811 * ata_device_add - Register hardware device with ATA and SCSI layers
4812 * @ent: Probe information describing hardware device to be registered
4814 * This function processes the information provided in the probe
4815 * information struct @ent, allocates the necessary ATA and SCSI
4816 * host information structures, initializes them, and registers
4817 * everything with requisite kernel subsystems.
4819 * This function requests irqs, probes the ATA bus, and probes
4823 * PCI/etc. bus probe sem.
4826 * Number of ports registered. Zero on error (no ports registered).
4829 int ata_device_add(const struct ata_probe_ent *ent)
4831 unsigned int count = 0, i;
4832 struct device *dev = ent->dev;
4833 struct ata_host_set *host_set;
4836 /* alloc a container for our list of ATA ports (buses) */
4837 host_set = kzalloc(sizeof(struct ata_host_set) +
4838 (ent->n_ports * sizeof(void *)), GFP_KERNEL);
4841 spin_lock_init(&host_set->lock);
4843 host_set->dev = dev;
4844 host_set->n_ports = ent->n_ports;
4845 host_set->irq = ent->irq;
4846 host_set->mmio_base = ent->mmio_base;
4847 host_set->private_data = ent->private_data;
4848 host_set->ops = ent->port_ops;
4849 host_set->flags = ent->host_set_flags;
4851 /* register each port bound to this device */
4852 for (i = 0; i < ent->n_ports; i++) {
4853 struct ata_port *ap;
4854 unsigned long xfer_mode_mask;
4856 ap = ata_host_add(ent, host_set, i);
4860 host_set->ports[i] = ap;
4861 xfer_mode_mask =(ap->udma_mask << ATA_SHIFT_UDMA) |
4862 (ap->mwdma_mask << ATA_SHIFT_MWDMA) |
4863 (ap->pio_mask << ATA_SHIFT_PIO);
4865 /* print per-port info to dmesg */
4866 printk(KERN_INFO "ata%u: %cATA max %s cmd 0x%lX ctl 0x%lX "
4867 "bmdma 0x%lX irq %lu\n",
4869 ap->flags & ATA_FLAG_SATA ? 'S' : 'P',
4870 ata_mode_string(xfer_mode_mask),
4871 ap->ioaddr.cmd_addr,
4872 ap->ioaddr.ctl_addr,
4873 ap->ioaddr.bmdma_addr,
4877 host_set->ops->irq_clear(ap);
4884 /* obtain irq, that is shared between channels */
4885 if (request_irq(ent->irq, ent->port_ops->irq_handler, ent->irq_flags,
4886 DRV_NAME, host_set))
4889 /* perform each probe synchronously */
4890 DPRINTK("probe begin\n");
4891 for (i = 0; i < count; i++) {
4892 struct ata_port *ap;
4895 ap = host_set->ports[i];
4897 DPRINTK("ata%u: bus probe begin\n", ap->id);
4898 rc = ata_bus_probe(ap);
4899 DPRINTK("ata%u: bus probe end\n", ap->id);
4902 /* FIXME: do something useful here?
4903 * Current libata behavior will
4904 * tear down everything when
4905 * the module is removed
4906 * or the h/w is unplugged.
4910 rc = scsi_add_host(ap->host, dev);
4912 printk(KERN_ERR "ata%u: scsi_add_host failed\n",
4914 /* FIXME: do something useful here */
4915 /* FIXME: handle unconditional calls to
4916 * scsi_scan_host and ata_host_remove, below,
4922 /* probes are done, now scan each port's disk(s) */
4923 DPRINTK("host probe begin\n");
4924 for (i = 0; i < count; i++) {
4925 struct ata_port *ap = host_set->ports[i];
4927 ata_scsi_scan_host(ap);
4930 dev_set_drvdata(dev, host_set);
4932 VPRINTK("EXIT, returning %u\n", ent->n_ports);
4933 return ent->n_ports; /* success */
4936 for (i = 0; i < count; i++) {
4937 ata_host_remove(host_set->ports[i], 1);
4938 scsi_host_put(host_set->ports[i]->host);
4942 VPRINTK("EXIT, returning 0\n");
4947 * ata_host_set_remove - PCI layer callback for device removal
4948 * @host_set: ATA host set that was removed
4950 * Unregister all objects associated with this host set. Free those
4954 * Inherited from calling layer (may sleep).
4957 void ata_host_set_remove(struct ata_host_set *host_set)
4959 struct ata_port *ap;
4962 for (i = 0; i < host_set->n_ports; i++) {
4963 ap = host_set->ports[i];
4964 scsi_remove_host(ap->host);
4967 free_irq(host_set->irq, host_set);
4969 for (i = 0; i < host_set->n_ports; i++) {
4970 ap = host_set->ports[i];
4972 ata_scsi_release(ap->host);
4974 if ((ap->flags & ATA_FLAG_NO_LEGACY) == 0) {
4975 struct ata_ioports *ioaddr = &ap->ioaddr;
4977 if (ioaddr->cmd_addr == 0x1f0)
4978 release_region(0x1f0, 8);
4979 else if (ioaddr->cmd_addr == 0x170)
4980 release_region(0x170, 8);
4983 scsi_host_put(ap->host);
4986 if (host_set->ops->host_stop)
4987 host_set->ops->host_stop(host_set);
4993 * ata_scsi_release - SCSI layer callback hook for host unload
4994 * @host: libata host to be unloaded
4996 * Performs all duties necessary to shut down a libata port...
4997 * Kill port kthread, disable port, and release resources.
5000 * Inherited from SCSI layer.
5006 int ata_scsi_release(struct Scsi_Host *host)
5008 struct ata_port *ap = ata_shost_to_port(host);
5012 ap->ops->port_disable(ap);
5013 ata_host_remove(ap, 0);
5020 * ata_std_ports - initialize ioaddr with standard port offsets.
5021 * @ioaddr: IO address structure to be initialized
5023 * Utility function which initializes data_addr, error_addr,
5024 * feature_addr, nsect_addr, lbal_addr, lbam_addr, lbah_addr,
5025 * device_addr, status_addr, and command_addr to standard offsets
5026 * relative to cmd_addr.
5028 * Does not set ctl_addr, altstatus_addr, bmdma_addr, or scr_addr.
5031 void ata_std_ports(struct ata_ioports *ioaddr)
5033 ioaddr->data_addr = ioaddr->cmd_addr + ATA_REG_DATA;
5034 ioaddr->error_addr = ioaddr->cmd_addr + ATA_REG_ERR;
5035 ioaddr->feature_addr = ioaddr->cmd_addr + ATA_REG_FEATURE;
5036 ioaddr->nsect_addr = ioaddr->cmd_addr + ATA_REG_NSECT;
5037 ioaddr->lbal_addr = ioaddr->cmd_addr + ATA_REG_LBAL;
5038 ioaddr->lbam_addr = ioaddr->cmd_addr + ATA_REG_LBAM;
5039 ioaddr->lbah_addr = ioaddr->cmd_addr + ATA_REG_LBAH;
5040 ioaddr->device_addr = ioaddr->cmd_addr + ATA_REG_DEVICE;
5041 ioaddr->status_addr = ioaddr->cmd_addr + ATA_REG_STATUS;
5042 ioaddr->command_addr = ioaddr->cmd_addr + ATA_REG_CMD;
5048 void ata_pci_host_stop (struct ata_host_set *host_set)
5050 struct pci_dev *pdev = to_pci_dev(host_set->dev);
5052 pci_iounmap(pdev, host_set->mmio_base);
5056 * ata_pci_remove_one - PCI layer callback for device removal
5057 * @pdev: PCI device that was removed
5059 * PCI layer indicates to libata via this hook that
5060 * hot-unplug or module unload event has occurred.
5061 * Handle this by unregistering all objects associated
5062 * with this PCI device. Free those objects. Then finally
5063 * release PCI resources and disable device.
5066 * Inherited from PCI layer (may sleep).
5069 void ata_pci_remove_one (struct pci_dev *pdev)
5071 struct device *dev = pci_dev_to_dev(pdev);
5072 struct ata_host_set *host_set = dev_get_drvdata(dev);
5074 ata_host_set_remove(host_set);
5075 pci_release_regions(pdev);
5076 pci_disable_device(pdev);
5077 dev_set_drvdata(dev, NULL);
5080 /* move to PCI subsystem */
5081 int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits)
5083 unsigned long tmp = 0;
5085 switch (bits->width) {
5088 pci_read_config_byte(pdev, bits->reg, &tmp8);
5094 pci_read_config_word(pdev, bits->reg, &tmp16);
5100 pci_read_config_dword(pdev, bits->reg, &tmp32);
5111 return (tmp == bits->val) ? 1 : 0;
5114 int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t state)
5116 pci_save_state(pdev);
5117 pci_disable_device(pdev);
5118 pci_set_power_state(pdev, PCI_D3hot);
5122 int ata_pci_device_resume(struct pci_dev *pdev)
5124 pci_set_power_state(pdev, PCI_D0);
5125 pci_restore_state(pdev);
5126 pci_enable_device(pdev);
5127 pci_set_master(pdev);
5130 #endif /* CONFIG_PCI */
5133 static int __init ata_init(void)
5135 ata_wq = create_workqueue("ata");
5139 printk(KERN_DEBUG "libata version " DRV_VERSION " loaded.\n");
5143 static void __exit ata_exit(void)
5145 destroy_workqueue(ata_wq);
5148 module_init(ata_init);
5149 module_exit(ata_exit);
5151 static unsigned long ratelimit_time;
5152 static spinlock_t ata_ratelimit_lock = SPIN_LOCK_UNLOCKED;
5154 int ata_ratelimit(void)
5157 unsigned long flags;
5159 spin_lock_irqsave(&ata_ratelimit_lock, flags);
5161 if (time_after(jiffies, ratelimit_time)) {
5163 ratelimit_time = jiffies + (HZ/5);
5167 spin_unlock_irqrestore(&ata_ratelimit_lock, flags);
5173 * ata_wait_register - wait until register value changes
5174 * @reg: IO-mapped register
5175 * @mask: Mask to apply to read register value
5176 * @val: Wait condition
5177 * @interval_msec: polling interval in milliseconds
5178 * @timeout_msec: timeout in milliseconds
5180 * Waiting for some bits of register to change is a common
5181 * operation for ATA controllers. This function reads 32bit LE
5182 * IO-mapped register @reg and tests for the following condition.
5184 * (*@reg & mask) != val
5186 * If the condition is met, it returns; otherwise, the process is
5187 * repeated after @interval_msec until timeout.
5190 * Kernel thread context (may sleep)
5193 * The final register value.
5195 u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val,
5196 unsigned long interval_msec,
5197 unsigned long timeout_msec)
5199 unsigned long timeout;
5202 tmp = ioread32(reg);
5204 /* Calculate timeout _after_ the first read to make sure
5205 * preceding writes reach the controller before starting to
5206 * eat away the timeout.
5208 timeout = jiffies + (timeout_msec * HZ) / 1000;
5210 while ((tmp & mask) == val && time_before(jiffies, timeout)) {
5211 msleep(interval_msec);
5212 tmp = ioread32(reg);
5219 * libata is essentially a library of internal helper functions for
5220 * low-level ATA host controller drivers. As such, the API/ABI is
5221 * likely to change as new drivers are added and updated.
5222 * Do not depend on ABI/API stability.
5225 EXPORT_SYMBOL_GPL(ata_std_bios_param);
5226 EXPORT_SYMBOL_GPL(ata_std_ports);
5227 EXPORT_SYMBOL_GPL(ata_device_add);
5228 EXPORT_SYMBOL_GPL(ata_host_set_remove);
5229 EXPORT_SYMBOL_GPL(ata_sg_init);
5230 EXPORT_SYMBOL_GPL(ata_sg_init_one);
5231 EXPORT_SYMBOL_GPL(__ata_qc_complete);
5232 EXPORT_SYMBOL_GPL(ata_qc_issue_prot);
5233 EXPORT_SYMBOL_GPL(ata_tf_load);
5234 EXPORT_SYMBOL_GPL(ata_tf_read);
5235 EXPORT_SYMBOL_GPL(ata_noop_dev_select);
5236 EXPORT_SYMBOL_GPL(ata_std_dev_select);
5237 EXPORT_SYMBOL_GPL(ata_tf_to_fis);
5238 EXPORT_SYMBOL_GPL(ata_tf_from_fis);
5239 EXPORT_SYMBOL_GPL(ata_check_status);
5240 EXPORT_SYMBOL_GPL(ata_altstatus);
5241 EXPORT_SYMBOL_GPL(ata_exec_command);
5242 EXPORT_SYMBOL_GPL(ata_port_start);
5243 EXPORT_SYMBOL_GPL(ata_port_stop);
5244 EXPORT_SYMBOL_GPL(ata_host_stop);
5245 EXPORT_SYMBOL_GPL(ata_interrupt);
5246 EXPORT_SYMBOL_GPL(ata_qc_prep);
5247 EXPORT_SYMBOL_GPL(ata_noop_qc_prep);
5248 EXPORT_SYMBOL_GPL(ata_bmdma_setup);
5249 EXPORT_SYMBOL_GPL(ata_bmdma_start);
5250 EXPORT_SYMBOL_GPL(ata_bmdma_irq_clear);
5251 EXPORT_SYMBOL_GPL(ata_bmdma_status);
5252 EXPORT_SYMBOL_GPL(ata_bmdma_stop);
5253 EXPORT_SYMBOL_GPL(ata_port_probe);
5254 EXPORT_SYMBOL_GPL(sata_set_spd);
5255 EXPORT_SYMBOL_GPL(sata_phy_reset);
5256 EXPORT_SYMBOL_GPL(__sata_phy_reset);
5257 EXPORT_SYMBOL_GPL(ata_bus_reset);
5258 EXPORT_SYMBOL_GPL(ata_std_probeinit);
5259 EXPORT_SYMBOL_GPL(ata_std_softreset);
5260 EXPORT_SYMBOL_GPL(sata_std_hardreset);
5261 EXPORT_SYMBOL_GPL(ata_std_postreset);
5262 EXPORT_SYMBOL_GPL(ata_std_probe_reset);
5263 EXPORT_SYMBOL_GPL(ata_drive_probe_reset);
5264 EXPORT_SYMBOL_GPL(ata_dev_revalidate);
5265 EXPORT_SYMBOL_GPL(ata_dev_classify);
5266 EXPORT_SYMBOL_GPL(ata_dev_pair);
5267 EXPORT_SYMBOL_GPL(ata_port_disable);
5268 EXPORT_SYMBOL_GPL(ata_ratelimit);
5269 EXPORT_SYMBOL_GPL(ata_wait_register);
5270 EXPORT_SYMBOL_GPL(ata_busy_sleep);
5271 EXPORT_SYMBOL_GPL(ata_port_queue_task);
5272 EXPORT_SYMBOL_GPL(ata_scsi_ioctl);
5273 EXPORT_SYMBOL_GPL(ata_scsi_queuecmd);
5274 EXPORT_SYMBOL_GPL(ata_scsi_slave_config);
5275 EXPORT_SYMBOL_GPL(ata_scsi_release);
5276 EXPORT_SYMBOL_GPL(ata_host_intr);
5277 EXPORT_SYMBOL_GPL(sata_scr_valid);
5278 EXPORT_SYMBOL_GPL(sata_scr_read);
5279 EXPORT_SYMBOL_GPL(sata_scr_write);
5280 EXPORT_SYMBOL_GPL(sata_scr_write_flush);
5281 EXPORT_SYMBOL_GPL(ata_port_online);
5282 EXPORT_SYMBOL_GPL(ata_port_offline);
5283 EXPORT_SYMBOL_GPL(ata_id_string);
5284 EXPORT_SYMBOL_GPL(ata_id_c_string);
5285 EXPORT_SYMBOL_GPL(ata_scsi_simulate);
5287 EXPORT_SYMBOL_GPL(ata_pio_need_iordy);
5288 EXPORT_SYMBOL_GPL(ata_timing_compute);
5289 EXPORT_SYMBOL_GPL(ata_timing_merge);
5292 EXPORT_SYMBOL_GPL(pci_test_config_bits);
5293 EXPORT_SYMBOL_GPL(ata_pci_host_stop);
5294 EXPORT_SYMBOL_GPL(ata_pci_init_native_mode);
5295 EXPORT_SYMBOL_GPL(ata_pci_init_one);
5296 EXPORT_SYMBOL_GPL(ata_pci_remove_one);
5297 EXPORT_SYMBOL_GPL(ata_pci_device_suspend);
5298 EXPORT_SYMBOL_GPL(ata_pci_device_resume);
5299 EXPORT_SYMBOL_GPL(ata_pci_default_filter);
5300 EXPORT_SYMBOL_GPL(ata_pci_clear_simplex);
5301 #endif /* CONFIG_PCI */
5303 EXPORT_SYMBOL_GPL(ata_device_suspend);
5304 EXPORT_SYMBOL_GPL(ata_device_resume);
5305 EXPORT_SYMBOL_GPL(ata_scsi_device_suspend);
5306 EXPORT_SYMBOL_GPL(ata_scsi_device_resume);
5308 EXPORT_SYMBOL_GPL(ata_eng_timeout);
5309 EXPORT_SYMBOL_GPL(ata_eh_qc_complete);
5310 EXPORT_SYMBOL_GPL(ata_eh_qc_retry);