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_port *ap,
65 struct ata_device *dev);
66 static void ata_set_mode(struct ata_port *ap);
67 static unsigned int ata_dev_set_xfermode(struct ata_port *ap,
68 struct ata_device *dev);
69 static void ata_dev_xfermask(struct ata_port *ap, struct ata_device *dev);
70 static void ata_pio_error(struct ata_port *ap);
72 static unsigned int ata_unique_id = 1;
73 static struct workqueue_struct *ata_wq;
75 int atapi_enabled = 1;
76 module_param(atapi_enabled, int, 0444);
77 MODULE_PARM_DESC(atapi_enabled, "Enable discovery of ATAPI devices (0=off, 1=on)");
80 module_param_named(fua, libata_fua, int, 0444);
81 MODULE_PARM_DESC(fua, "FUA support (0=off, 1=on)");
83 MODULE_AUTHOR("Jeff Garzik");
84 MODULE_DESCRIPTION("Library module for ATA devices");
85 MODULE_LICENSE("GPL");
86 MODULE_VERSION(DRV_VERSION);
90 * ata_tf_to_fis - Convert ATA taskfile to SATA FIS structure
91 * @tf: Taskfile to convert
92 * @fis: Buffer into which data will output
93 * @pmp: Port multiplier port
95 * Converts a standard ATA taskfile to a Serial ATA
96 * FIS structure (Register - Host to Device).
99 * Inherited from caller.
102 void ata_tf_to_fis(const struct ata_taskfile *tf, u8 *fis, u8 pmp)
104 fis[0] = 0x27; /* Register - Host to Device FIS */
105 fis[1] = (pmp & 0xf) | (1 << 7); /* Port multiplier number,
106 bit 7 indicates Command FIS */
107 fis[2] = tf->command;
108 fis[3] = tf->feature;
115 fis[8] = tf->hob_lbal;
116 fis[9] = tf->hob_lbam;
117 fis[10] = tf->hob_lbah;
118 fis[11] = tf->hob_feature;
121 fis[13] = tf->hob_nsect;
132 * ata_tf_from_fis - Convert SATA FIS to ATA taskfile
133 * @fis: Buffer from which data will be input
134 * @tf: Taskfile to output
136 * Converts a serial ATA FIS structure to a standard ATA taskfile.
139 * Inherited from caller.
142 void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf)
144 tf->command = fis[2]; /* status */
145 tf->feature = fis[3]; /* error */
152 tf->hob_lbal = fis[8];
153 tf->hob_lbam = fis[9];
154 tf->hob_lbah = fis[10];
157 tf->hob_nsect = fis[13];
160 static const u8 ata_rw_cmds[] = {
164 ATA_CMD_READ_MULTI_EXT,
165 ATA_CMD_WRITE_MULTI_EXT,
169 ATA_CMD_WRITE_MULTI_FUA_EXT,
173 ATA_CMD_PIO_READ_EXT,
174 ATA_CMD_PIO_WRITE_EXT,
187 ATA_CMD_WRITE_FUA_EXT
191 * ata_rwcmd_protocol - set taskfile r/w commands and protocol
192 * @qc: command to examine and configure
194 * Examine the device configuration and tf->flags to calculate
195 * the proper read/write commands and protocol to use.
200 int ata_rwcmd_protocol(struct ata_queued_cmd *qc)
202 struct ata_taskfile *tf = &qc->tf;
203 struct ata_device *dev = qc->dev;
206 int index, fua, lba48, write;
208 fua = (tf->flags & ATA_TFLAG_FUA) ? 4 : 0;
209 lba48 = (tf->flags & ATA_TFLAG_LBA48) ? 2 : 0;
210 write = (tf->flags & ATA_TFLAG_WRITE) ? 1 : 0;
212 if (dev->flags & ATA_DFLAG_PIO) {
213 tf->protocol = ATA_PROT_PIO;
214 index = dev->multi_count ? 0 : 8;
215 } else if (lba48 && (qc->ap->flags & ATA_FLAG_PIO_LBA48)) {
216 /* Unable to use DMA due to host limitation */
217 tf->protocol = ATA_PROT_PIO;
218 index = dev->multi_count ? 0 : 8;
220 tf->protocol = ATA_PROT_DMA;
224 cmd = ata_rw_cmds[index + fua + lba48 + write];
233 * ata_pack_xfermask - Pack pio, mwdma and udma masks into xfer_mask
234 * @pio_mask: pio_mask
235 * @mwdma_mask: mwdma_mask
236 * @udma_mask: udma_mask
238 * Pack @pio_mask, @mwdma_mask and @udma_mask into a single
239 * unsigned int xfer_mask.
247 static unsigned int ata_pack_xfermask(unsigned int pio_mask,
248 unsigned int mwdma_mask,
249 unsigned int udma_mask)
251 return ((pio_mask << ATA_SHIFT_PIO) & ATA_MASK_PIO) |
252 ((mwdma_mask << ATA_SHIFT_MWDMA) & ATA_MASK_MWDMA) |
253 ((udma_mask << ATA_SHIFT_UDMA) & ATA_MASK_UDMA);
257 * ata_unpack_xfermask - Unpack xfer_mask into pio, mwdma and udma masks
258 * @xfer_mask: xfer_mask to unpack
259 * @pio_mask: resulting pio_mask
260 * @mwdma_mask: resulting mwdma_mask
261 * @udma_mask: resulting udma_mask
263 * Unpack @xfer_mask into @pio_mask, @mwdma_mask and @udma_mask.
264 * Any NULL distination masks will be ignored.
266 static void ata_unpack_xfermask(unsigned int xfer_mask,
267 unsigned int *pio_mask,
268 unsigned int *mwdma_mask,
269 unsigned int *udma_mask)
272 *pio_mask = (xfer_mask & ATA_MASK_PIO) >> ATA_SHIFT_PIO;
274 *mwdma_mask = (xfer_mask & ATA_MASK_MWDMA) >> ATA_SHIFT_MWDMA;
276 *udma_mask = (xfer_mask & ATA_MASK_UDMA) >> ATA_SHIFT_UDMA;
279 static const struct ata_xfer_ent {
280 unsigned int shift, bits;
283 { ATA_SHIFT_PIO, ATA_BITS_PIO, XFER_PIO_0 },
284 { ATA_SHIFT_MWDMA, ATA_BITS_MWDMA, XFER_MW_DMA_0 },
285 { ATA_SHIFT_UDMA, ATA_BITS_UDMA, XFER_UDMA_0 },
290 * ata_xfer_mask2mode - Find matching XFER_* for the given xfer_mask
291 * @xfer_mask: xfer_mask of interest
293 * Return matching XFER_* value for @xfer_mask. Only the highest
294 * bit of @xfer_mask is considered.
300 * Matching XFER_* value, 0 if no match found.
302 static u8 ata_xfer_mask2mode(unsigned int xfer_mask)
304 int highbit = fls(xfer_mask) - 1;
305 const struct ata_xfer_ent *ent;
307 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
308 if (highbit >= ent->shift && highbit < ent->shift + ent->bits)
309 return ent->base + highbit - ent->shift;
314 * ata_xfer_mode2mask - Find matching xfer_mask for XFER_*
315 * @xfer_mode: XFER_* of interest
317 * Return matching xfer_mask for @xfer_mode.
323 * Matching xfer_mask, 0 if no match found.
325 static unsigned int ata_xfer_mode2mask(u8 xfer_mode)
327 const struct ata_xfer_ent *ent;
329 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
330 if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits)
331 return 1 << (ent->shift + xfer_mode - ent->base);
336 * ata_xfer_mode2shift - Find matching xfer_shift for XFER_*
337 * @xfer_mode: XFER_* of interest
339 * Return matching xfer_shift for @xfer_mode.
345 * Matching xfer_shift, -1 if no match found.
347 static int ata_xfer_mode2shift(unsigned int xfer_mode)
349 const struct ata_xfer_ent *ent;
351 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
352 if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits)
358 * ata_mode_string - convert xfer_mask to string
359 * @xfer_mask: mask of bits supported; only highest bit counts.
361 * Determine string which represents the highest speed
362 * (highest bit in @modemask).
368 * Constant C string representing highest speed listed in
369 * @mode_mask, or the constant C string "<n/a>".
371 static const char *ata_mode_string(unsigned int xfer_mask)
373 static const char * const xfer_mode_str[] = {
393 highbit = fls(xfer_mask) - 1;
394 if (highbit >= 0 && highbit < ARRAY_SIZE(xfer_mode_str))
395 return xfer_mode_str[highbit];
399 static void ata_dev_disable(struct ata_port *ap, struct ata_device *dev)
401 if (ata_dev_present(dev)) {
402 printk(KERN_WARNING "ata%u: dev %u disabled\n",
409 * ata_pio_devchk - PATA device presence detection
410 * @ap: ATA channel to examine
411 * @device: Device to examine (starting at zero)
413 * This technique was originally described in
414 * Hale Landis's ATADRVR (www.ata-atapi.com), and
415 * later found its way into the ATA/ATAPI spec.
417 * Write a pattern to the ATA shadow registers,
418 * and if a device is present, it will respond by
419 * correctly storing and echoing back the
420 * ATA shadow register contents.
426 static unsigned int ata_pio_devchk(struct ata_port *ap,
429 struct ata_ioports *ioaddr = &ap->ioaddr;
432 ap->ops->dev_select(ap, device);
434 outb(0x55, ioaddr->nsect_addr);
435 outb(0xaa, ioaddr->lbal_addr);
437 outb(0xaa, ioaddr->nsect_addr);
438 outb(0x55, ioaddr->lbal_addr);
440 outb(0x55, ioaddr->nsect_addr);
441 outb(0xaa, ioaddr->lbal_addr);
443 nsect = inb(ioaddr->nsect_addr);
444 lbal = inb(ioaddr->lbal_addr);
446 if ((nsect == 0x55) && (lbal == 0xaa))
447 return 1; /* we found a device */
449 return 0; /* nothing found */
453 * ata_mmio_devchk - PATA device presence detection
454 * @ap: ATA channel to examine
455 * @device: Device to examine (starting at zero)
457 * This technique was originally described in
458 * Hale Landis's ATADRVR (www.ata-atapi.com), and
459 * later found its way into the ATA/ATAPI spec.
461 * Write a pattern to the ATA shadow registers,
462 * and if a device is present, it will respond by
463 * correctly storing and echoing back the
464 * ATA shadow register contents.
470 static unsigned int ata_mmio_devchk(struct ata_port *ap,
473 struct ata_ioports *ioaddr = &ap->ioaddr;
476 ap->ops->dev_select(ap, device);
478 writeb(0x55, (void __iomem *) ioaddr->nsect_addr);
479 writeb(0xaa, (void __iomem *) ioaddr->lbal_addr);
481 writeb(0xaa, (void __iomem *) ioaddr->nsect_addr);
482 writeb(0x55, (void __iomem *) ioaddr->lbal_addr);
484 writeb(0x55, (void __iomem *) ioaddr->nsect_addr);
485 writeb(0xaa, (void __iomem *) ioaddr->lbal_addr);
487 nsect = readb((void __iomem *) ioaddr->nsect_addr);
488 lbal = readb((void __iomem *) ioaddr->lbal_addr);
490 if ((nsect == 0x55) && (lbal == 0xaa))
491 return 1; /* we found a device */
493 return 0; /* nothing found */
497 * ata_devchk - PATA device presence detection
498 * @ap: ATA channel to examine
499 * @device: Device to examine (starting at zero)
501 * Dispatch ATA device presence detection, depending
502 * on whether we are using PIO or MMIO to talk to the
503 * ATA shadow registers.
509 static unsigned int ata_devchk(struct ata_port *ap,
512 if (ap->flags & ATA_FLAG_MMIO)
513 return ata_mmio_devchk(ap, device);
514 return ata_pio_devchk(ap, device);
518 * ata_dev_classify - determine device type based on ATA-spec signature
519 * @tf: ATA taskfile register set for device to be identified
521 * Determine from taskfile register contents whether a device is
522 * ATA or ATAPI, as per "Signature and persistence" section
523 * of ATA/PI spec (volume 1, sect 5.14).
529 * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, or %ATA_DEV_UNKNOWN
530 * the event of failure.
533 unsigned int ata_dev_classify(const struct ata_taskfile *tf)
535 /* Apple's open source Darwin code hints that some devices only
536 * put a proper signature into the LBA mid/high registers,
537 * So, we only check those. It's sufficient for uniqueness.
540 if (((tf->lbam == 0) && (tf->lbah == 0)) ||
541 ((tf->lbam == 0x3c) && (tf->lbah == 0xc3))) {
542 DPRINTK("found ATA device by sig\n");
546 if (((tf->lbam == 0x14) && (tf->lbah == 0xeb)) ||
547 ((tf->lbam == 0x69) && (tf->lbah == 0x96))) {
548 DPRINTK("found ATAPI device by sig\n");
549 return ATA_DEV_ATAPI;
552 DPRINTK("unknown device\n");
553 return ATA_DEV_UNKNOWN;
557 * ata_dev_try_classify - Parse returned ATA device signature
558 * @ap: ATA channel to examine
559 * @device: Device to examine (starting at zero)
560 * @r_err: Value of error register on completion
562 * After an event -- SRST, E.D.D., or SATA COMRESET -- occurs,
563 * an ATA/ATAPI-defined set of values is placed in the ATA
564 * shadow registers, indicating the results of device detection
567 * Select the ATA device, and read the values from the ATA shadow
568 * registers. Then parse according to the Error register value,
569 * and the spec-defined values examined by ata_dev_classify().
575 * Device type - %ATA_DEV_ATA, %ATA_DEV_ATAPI or %ATA_DEV_NONE.
579 ata_dev_try_classify(struct ata_port *ap, unsigned int device, u8 *r_err)
581 struct ata_taskfile tf;
585 ap->ops->dev_select(ap, device);
587 memset(&tf, 0, sizeof(tf));
589 ap->ops->tf_read(ap, &tf);
594 /* see if device passed diags */
597 else if ((device == 0) && (err == 0x81))
602 /* determine if device is ATA or ATAPI */
603 class = ata_dev_classify(&tf);
605 if (class == ATA_DEV_UNKNOWN)
607 if ((class == ATA_DEV_ATA) && (ata_chk_status(ap) == 0))
613 * ata_id_string - Convert IDENTIFY DEVICE page into string
614 * @id: IDENTIFY DEVICE results we will examine
615 * @s: string into which data is output
616 * @ofs: offset into identify device page
617 * @len: length of string to return. must be an even number.
619 * The strings in the IDENTIFY DEVICE page are broken up into
620 * 16-bit chunks. Run through the string, and output each
621 * 8-bit chunk linearly, regardless of platform.
627 void ata_id_string(const u16 *id, unsigned char *s,
628 unsigned int ofs, unsigned int len)
647 * ata_id_c_string - Convert IDENTIFY DEVICE page into C string
648 * @id: IDENTIFY DEVICE results we will examine
649 * @s: string into which data is output
650 * @ofs: offset into identify device page
651 * @len: length of string to return. must be an odd number.
653 * This function is identical to ata_id_string except that it
654 * trims trailing spaces and terminates the resulting string with
655 * null. @len must be actual maximum length (even number) + 1.
660 void ata_id_c_string(const u16 *id, unsigned char *s,
661 unsigned int ofs, unsigned int len)
667 ata_id_string(id, s, ofs, len - 1);
669 p = s + strnlen(s, len - 1);
670 while (p > s && p[-1] == ' ')
675 static u64 ata_id_n_sectors(const u16 *id)
677 if (ata_id_has_lba(id)) {
678 if (ata_id_has_lba48(id))
679 return ata_id_u64(id, 100);
681 return ata_id_u32(id, 60);
683 if (ata_id_current_chs_valid(id))
684 return ata_id_u32(id, 57);
686 return id[1] * id[3] * id[6];
691 * ata_noop_dev_select - Select device 0/1 on ATA bus
692 * @ap: ATA channel to manipulate
693 * @device: ATA device (numbered from zero) to select
695 * This function performs no actual function.
697 * May be used as the dev_select() entry in ata_port_operations.
702 void ata_noop_dev_select (struct ata_port *ap, unsigned int device)
708 * ata_std_dev_select - Select device 0/1 on ATA bus
709 * @ap: ATA channel to manipulate
710 * @device: ATA device (numbered from zero) to select
712 * Use the method defined in the ATA specification to
713 * make either device 0, or device 1, active on the
714 * ATA channel. Works with both PIO and MMIO.
716 * May be used as the dev_select() entry in ata_port_operations.
722 void ata_std_dev_select (struct ata_port *ap, unsigned int device)
727 tmp = ATA_DEVICE_OBS;
729 tmp = ATA_DEVICE_OBS | ATA_DEV1;
731 if (ap->flags & ATA_FLAG_MMIO) {
732 writeb(tmp, (void __iomem *) ap->ioaddr.device_addr);
734 outb(tmp, ap->ioaddr.device_addr);
736 ata_pause(ap); /* needed; also flushes, for mmio */
740 * ata_dev_select - Select device 0/1 on ATA bus
741 * @ap: ATA channel to manipulate
742 * @device: ATA device (numbered from zero) to select
743 * @wait: non-zero to wait for Status register BSY bit to clear
744 * @can_sleep: non-zero if context allows sleeping
746 * Use the method defined in the ATA specification to
747 * make either device 0, or device 1, active on the
750 * This is a high-level version of ata_std_dev_select(),
751 * which additionally provides the services of inserting
752 * the proper pauses and status polling, where needed.
758 void ata_dev_select(struct ata_port *ap, unsigned int device,
759 unsigned int wait, unsigned int can_sleep)
761 VPRINTK("ENTER, ata%u: device %u, wait %u\n",
762 ap->id, device, wait);
767 ap->ops->dev_select(ap, device);
770 if (can_sleep && ap->device[device].class == ATA_DEV_ATAPI)
777 * ata_dump_id - IDENTIFY DEVICE info debugging output
778 * @id: IDENTIFY DEVICE page to dump
780 * Dump selected 16-bit words from the given IDENTIFY DEVICE
787 static inline void ata_dump_id(const u16 *id)
789 DPRINTK("49==0x%04x "
799 DPRINTK("80==0x%04x "
809 DPRINTK("88==0x%04x "
816 * ata_id_xfermask - Compute xfermask from the given IDENTIFY data
817 * @id: IDENTIFY data to compute xfer mask from
819 * Compute the xfermask for this device. This is not as trivial
820 * as it seems if we must consider early devices correctly.
822 * FIXME: pre IDE drive timing (do we care ?).
830 static unsigned int ata_id_xfermask(const u16 *id)
832 unsigned int pio_mask, mwdma_mask, udma_mask;
834 /* Usual case. Word 53 indicates word 64 is valid */
835 if (id[ATA_ID_FIELD_VALID] & (1 << 1)) {
836 pio_mask = id[ATA_ID_PIO_MODES] & 0x03;
840 /* If word 64 isn't valid then Word 51 high byte holds
841 * the PIO timing number for the maximum. Turn it into
844 pio_mask = (2 << (id[ATA_ID_OLD_PIO_MODES] & 0xFF)) - 1 ;
846 /* But wait.. there's more. Design your standards by
847 * committee and you too can get a free iordy field to
848 * process. However its the speeds not the modes that
849 * are supported... Note drivers using the timing API
850 * will get this right anyway
854 mwdma_mask = id[ATA_ID_MWDMA_MODES] & 0x07;
857 if (id[ATA_ID_FIELD_VALID] & (1 << 2))
858 udma_mask = id[ATA_ID_UDMA_MODES] & 0xff;
860 return ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask);
864 * ata_port_queue_task - Queue port_task
865 * @ap: The ata_port to queue port_task for
867 * Schedule @fn(@data) for execution after @delay jiffies using
868 * port_task. There is one port_task per port and it's the
869 * user(low level driver)'s responsibility to make sure that only
870 * one task is active at any given time.
872 * libata core layer takes care of synchronization between
873 * port_task and EH. ata_port_queue_task() may be ignored for EH
877 * Inherited from caller.
879 void ata_port_queue_task(struct ata_port *ap, void (*fn)(void *), void *data,
884 if (ap->flags & ATA_FLAG_FLUSH_PORT_TASK)
887 PREPARE_WORK(&ap->port_task, fn, data);
890 rc = queue_work(ata_wq, &ap->port_task);
892 rc = queue_delayed_work(ata_wq, &ap->port_task, delay);
894 /* rc == 0 means that another user is using port task */
899 * ata_port_flush_task - Flush port_task
900 * @ap: The ata_port to flush port_task for
902 * After this function completes, port_task is guranteed not to
903 * be running or scheduled.
906 * Kernel thread context (may sleep)
908 void ata_port_flush_task(struct ata_port *ap)
914 spin_lock_irqsave(&ap->host_set->lock, flags);
915 ap->flags |= ATA_FLAG_FLUSH_PORT_TASK;
916 spin_unlock_irqrestore(&ap->host_set->lock, flags);
918 DPRINTK("flush #1\n");
919 flush_workqueue(ata_wq);
922 * At this point, if a task is running, it's guaranteed to see
923 * the FLUSH flag; thus, it will never queue pio tasks again.
926 if (!cancel_delayed_work(&ap->port_task)) {
927 DPRINTK("flush #2\n");
928 flush_workqueue(ata_wq);
931 spin_lock_irqsave(&ap->host_set->lock, flags);
932 ap->flags &= ~ATA_FLAG_FLUSH_PORT_TASK;
933 spin_unlock_irqrestore(&ap->host_set->lock, flags);
938 void ata_qc_complete_internal(struct ata_queued_cmd *qc)
940 struct completion *waiting = qc->private_data;
942 qc->ap->ops->tf_read(qc->ap, &qc->tf);
947 * ata_exec_internal - execute libata internal command
948 * @ap: Port to which the command is sent
949 * @dev: Device to which the command is sent
950 * @tf: Taskfile registers for the command and the result
951 * @dma_dir: Data tranfer direction of the command
952 * @buf: Data buffer of the command
953 * @buflen: Length of data buffer
955 * Executes libata internal command with timeout. @tf contains
956 * command on entry and result on return. Timeout and error
957 * conditions are reported via return value. No recovery action
958 * is taken after a command times out. It's caller's duty to
959 * clean up after timeout.
962 * None. Should be called with kernel context, might sleep.
966 ata_exec_internal(struct ata_port *ap, struct ata_device *dev,
967 struct ata_taskfile *tf,
968 int dma_dir, void *buf, unsigned int buflen)
970 u8 command = tf->command;
971 struct ata_queued_cmd *qc;
972 DECLARE_COMPLETION(wait);
974 unsigned int err_mask;
976 spin_lock_irqsave(&ap->host_set->lock, flags);
978 qc = ata_qc_new_init(ap, dev);
982 qc->dma_dir = dma_dir;
983 if (dma_dir != DMA_NONE) {
984 ata_sg_init_one(qc, buf, buflen);
985 qc->nsect = buflen / ATA_SECT_SIZE;
988 qc->private_data = &wait;
989 qc->complete_fn = ata_qc_complete_internal;
991 qc->err_mask = ata_qc_issue(qc);
995 spin_unlock_irqrestore(&ap->host_set->lock, flags);
997 if (!wait_for_completion_timeout(&wait, ATA_TMOUT_INTERNAL)) {
998 ata_port_flush_task(ap);
1000 spin_lock_irqsave(&ap->host_set->lock, flags);
1002 /* We're racing with irq here. If we lose, the
1003 * following test prevents us from completing the qc
1004 * again. If completion irq occurs after here but
1005 * before the caller cleans up, it will result in a
1006 * spurious interrupt. We can live with that.
1008 if (qc->flags & ATA_QCFLAG_ACTIVE) {
1009 qc->err_mask = AC_ERR_TIMEOUT;
1010 ata_qc_complete(qc);
1011 printk(KERN_WARNING "ata%u: qc timeout (cmd 0x%x)\n",
1015 spin_unlock_irqrestore(&ap->host_set->lock, flags);
1019 err_mask = qc->err_mask;
1023 /* XXX - Some LLDDs (sata_mv) disable port on command failure.
1024 * Until those drivers are fixed, we detect the condition
1025 * here, fail the command with AC_ERR_SYSTEM and reenable the
1028 * Note that this doesn't change any behavior as internal
1029 * command failure results in disabling the device in the
1030 * higher layer for LLDDs without new reset/EH callbacks.
1032 * Kill the following code as soon as those drivers are fixed.
1034 if (ap->flags & ATA_FLAG_PORT_DISABLED) {
1035 err_mask |= AC_ERR_SYSTEM;
1043 * ata_pio_need_iordy - check if iordy needed
1046 * Check if the current speed of the device requires IORDY. Used
1047 * by various controllers for chip configuration.
1050 unsigned int ata_pio_need_iordy(const struct ata_device *adev)
1053 int speed = adev->pio_mode - XFER_PIO_0;
1060 /* If we have no drive specific rule, then PIO 2 is non IORDY */
1062 if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE */
1063 pio = adev->id[ATA_ID_EIDE_PIO];
1064 /* Is the speed faster than the drive allows non IORDY ? */
1066 /* This is cycle times not frequency - watch the logic! */
1067 if (pio > 240) /* PIO2 is 240nS per cycle */
1076 * ata_dev_read_id - Read ID data from the specified device
1077 * @ap: port on which target device resides
1078 * @dev: target device
1079 * @p_class: pointer to class of the target device (may be changed)
1080 * @post_reset: is this read ID post-reset?
1081 * @p_id: read IDENTIFY page (newly allocated)
1083 * Read ID data from the specified device. ATA_CMD_ID_ATA is
1084 * performed on ATA devices and ATA_CMD_ID_ATAPI on ATAPI
1085 * devices. This function also issues ATA_CMD_INIT_DEV_PARAMS
1086 * for pre-ATA4 drives.
1089 * Kernel thread context (may sleep)
1092 * 0 on success, -errno otherwise.
1094 static int ata_dev_read_id(struct ata_port *ap, struct ata_device *dev,
1095 unsigned int *p_class, int post_reset, u16 **p_id)
1097 unsigned int class = *p_class;
1098 struct ata_taskfile tf;
1099 unsigned int err_mask = 0;
1104 DPRINTK("ENTER, host %u, dev %u\n", ap->id, dev->devno);
1106 ata_dev_select(ap, dev->devno, 1, 1); /* select device 0/1 */
1108 id = kmalloc(sizeof(id[0]) * ATA_ID_WORDS, GFP_KERNEL);
1111 reason = "out of memory";
1116 ata_tf_init(ap, &tf, dev->devno);
1120 tf.command = ATA_CMD_ID_ATA;
1123 tf.command = ATA_CMD_ID_ATAPI;
1127 reason = "unsupported class";
1131 tf.protocol = ATA_PROT_PIO;
1133 err_mask = ata_exec_internal(ap, dev, &tf, DMA_FROM_DEVICE,
1134 id, sizeof(id[0]) * ATA_ID_WORDS);
1137 reason = "I/O error";
1141 swap_buf_le16(id, ATA_ID_WORDS);
1144 if ((class == ATA_DEV_ATA) != ata_id_is_ata(id)) {
1146 reason = "device reports illegal type";
1150 if (post_reset && class == ATA_DEV_ATA) {
1152 * The exact sequence expected by certain pre-ATA4 drives is:
1155 * INITIALIZE DEVICE PARAMETERS
1157 * Some drives were very specific about that exact sequence.
1159 if (ata_id_major_version(id) < 4 || !ata_id_has_lba(id)) {
1160 err_mask = ata_dev_init_params(ap, dev);
1163 reason = "INIT_DEV_PARAMS failed";
1167 /* current CHS translation info (id[53-58]) might be
1168 * changed. reread the identify device info.
1180 printk(KERN_WARNING "ata%u: dev %u failed to IDENTIFY (%s)\n",
1181 ap->id, dev->devno, reason);
1186 static inline u8 ata_dev_knobble(const struct ata_port *ap,
1187 struct ata_device *dev)
1189 return ((ap->cbl == ATA_CBL_SATA) && (!ata_id_is_sata(dev->id)));
1193 * ata_dev_configure - Configure the specified ATA/ATAPI device
1194 * @ap: Port on which target device resides
1195 * @dev: Target device to configure
1196 * @print_info: Enable device info printout
1198 * Configure @dev according to @dev->id. Generic and low-level
1199 * driver specific fixups are also applied.
1202 * Kernel thread context (may sleep)
1205 * 0 on success, -errno otherwise
1207 static int ata_dev_configure(struct ata_port *ap, struct ata_device *dev,
1210 const u16 *id = dev->id;
1211 unsigned int xfer_mask;
1214 if (!ata_dev_present(dev)) {
1215 DPRINTK("ENTER/EXIT (host %u, dev %u) -- nodev\n",
1216 ap->id, dev->devno);
1220 DPRINTK("ENTER, host %u, dev %u\n", ap->id, dev->devno);
1222 /* print device capabilities */
1224 printk(KERN_DEBUG "ata%u: dev %u cfg 49:%04x 82:%04x 83:%04x "
1225 "84:%04x 85:%04x 86:%04x 87:%04x 88:%04x\n",
1226 ap->id, dev->devno, id[49], id[82], id[83],
1227 id[84], id[85], id[86], id[87], id[88]);
1229 /* initialize to-be-configured parameters */
1231 dev->max_sectors = 0;
1239 * common ATA, ATAPI feature tests
1242 /* find max transfer mode; for printk only */
1243 xfer_mask = ata_id_xfermask(id);
1247 /* ATA-specific feature tests */
1248 if (dev->class == ATA_DEV_ATA) {
1249 dev->n_sectors = ata_id_n_sectors(id);
1251 if (ata_id_has_lba(id)) {
1252 const char *lba_desc;
1255 dev->flags |= ATA_DFLAG_LBA;
1256 if (ata_id_has_lba48(id)) {
1257 dev->flags |= ATA_DFLAG_LBA48;
1261 /* print device info to dmesg */
1263 printk(KERN_INFO "ata%u: dev %u ATA-%d, "
1264 "max %s, %Lu sectors: %s\n",
1266 ata_id_major_version(id),
1267 ata_mode_string(xfer_mask),
1268 (unsigned long long)dev->n_sectors,
1273 /* Default translation */
1274 dev->cylinders = id[1];
1276 dev->sectors = id[6];
1278 if (ata_id_current_chs_valid(id)) {
1279 /* Current CHS translation is valid. */
1280 dev->cylinders = id[54];
1281 dev->heads = id[55];
1282 dev->sectors = id[56];
1285 /* print device info to dmesg */
1287 printk(KERN_INFO "ata%u: dev %u ATA-%d, "
1288 "max %s, %Lu sectors: CHS %u/%u/%u\n",
1290 ata_id_major_version(id),
1291 ata_mode_string(xfer_mask),
1292 (unsigned long long)dev->n_sectors,
1293 dev->cylinders, dev->heads, dev->sectors);
1296 if (dev->id[59] & 0x100) {
1297 dev->multi_count = dev->id[59] & 0xff;
1298 DPRINTK("ata%u: dev %u multi count %u\n",
1299 ap->id, device, dev->multi_count);
1305 /* ATAPI-specific feature tests */
1306 else if (dev->class == ATA_DEV_ATAPI) {
1307 rc = atapi_cdb_len(id);
1308 if ((rc < 12) || (rc > ATAPI_CDB_LEN)) {
1309 printk(KERN_WARNING "ata%u: unsupported CDB len\n", ap->id);
1313 dev->cdb_len = (unsigned int) rc;
1315 if (ata_id_cdb_intr(dev->id))
1316 dev->flags |= ATA_DFLAG_CDB_INTR;
1318 /* print device info to dmesg */
1320 printk(KERN_INFO "ata%u: dev %u ATAPI, max %s\n",
1321 ap->id, dev->devno, ata_mode_string(xfer_mask));
1324 ap->host->max_cmd_len = 0;
1325 for (i = 0; i < ATA_MAX_DEVICES; i++)
1326 ap->host->max_cmd_len = max_t(unsigned int,
1327 ap->host->max_cmd_len,
1328 ap->device[i].cdb_len);
1330 /* limit bridge transfers to udma5, 200 sectors */
1331 if (ata_dev_knobble(ap, dev)) {
1333 printk(KERN_INFO "ata%u(%u): applying bridge limits\n",
1334 ap->id, dev->devno);
1335 dev->udma_mask &= ATA_UDMA5;
1336 dev->max_sectors = ATA_MAX_SECTORS;
1339 if (ap->ops->dev_config)
1340 ap->ops->dev_config(ap, dev);
1342 DPRINTK("EXIT, drv_stat = 0x%x\n", ata_chk_status(ap));
1346 DPRINTK("EXIT, err\n");
1351 * ata_bus_probe - Reset and probe ATA bus
1354 * Master ATA bus probing function. Initiates a hardware-dependent
1355 * bus reset, then attempts to identify any devices found on
1359 * PCI/etc. bus probe sem.
1362 * Zero on success, non-zero on error.
1365 static int ata_bus_probe(struct ata_port *ap)
1367 unsigned int classes[ATA_MAX_DEVICES];
1368 unsigned int i, rc, found = 0;
1372 /* reset and determine device classes */
1373 for (i = 0; i < ATA_MAX_DEVICES; i++)
1374 classes[i] = ATA_DEV_UNKNOWN;
1376 if (ap->ops->probe_reset) {
1377 rc = ap->ops->probe_reset(ap, classes);
1379 printk("ata%u: reset failed (errno=%d)\n", ap->id, rc);
1383 ap->ops->phy_reset(ap);
1385 if (!(ap->flags & ATA_FLAG_PORT_DISABLED))
1386 for (i = 0; i < ATA_MAX_DEVICES; i++)
1387 classes[i] = ap->device[i].class;
1392 for (i = 0; i < ATA_MAX_DEVICES; i++)
1393 if (classes[i] == ATA_DEV_UNKNOWN)
1394 classes[i] = ATA_DEV_NONE;
1396 /* read IDENTIFY page and configure devices */
1397 for (i = 0; i < ATA_MAX_DEVICES; i++) {
1398 struct ata_device *dev = &ap->device[i];
1400 dev->class = classes[i];
1402 if (!ata_dev_present(dev))
1405 WARN_ON(dev->id != NULL);
1406 if (ata_dev_read_id(ap, dev, &dev->class, 1, &dev->id)) {
1407 dev->class = ATA_DEV_NONE;
1411 if (ata_dev_configure(ap, dev, 1)) {
1412 ata_dev_disable(ap, dev);
1420 goto err_out_disable;
1423 if (ap->flags & ATA_FLAG_PORT_DISABLED)
1424 goto err_out_disable;
1429 ap->ops->port_disable(ap);
1434 * ata_port_probe - Mark port as enabled
1435 * @ap: Port for which we indicate enablement
1437 * Modify @ap data structure such that the system
1438 * thinks that the entire port is enabled.
1440 * LOCKING: host_set lock, or some other form of
1444 void ata_port_probe(struct ata_port *ap)
1446 ap->flags &= ~ATA_FLAG_PORT_DISABLED;
1450 * sata_print_link_status - Print SATA link status
1451 * @ap: SATA port to printk link status about
1453 * This function prints link speed and status of a SATA link.
1458 static void sata_print_link_status(struct ata_port *ap)
1463 if (!ap->ops->scr_read)
1466 sstatus = scr_read(ap, SCR_STATUS);
1468 if (sata_dev_present(ap)) {
1469 tmp = (sstatus >> 4) & 0xf;
1472 else if (tmp & (1 << 1))
1475 speed = "<unknown>";
1476 printk(KERN_INFO "ata%u: SATA link up %s Gbps (SStatus %X)\n",
1477 ap->id, speed, sstatus);
1479 printk(KERN_INFO "ata%u: SATA link down (SStatus %X)\n",
1485 * __sata_phy_reset - Wake/reset a low-level SATA PHY
1486 * @ap: SATA port associated with target SATA PHY.
1488 * This function issues commands to standard SATA Sxxx
1489 * PHY registers, to wake up the phy (and device), and
1490 * clear any reset condition.
1493 * PCI/etc. bus probe sem.
1496 void __sata_phy_reset(struct ata_port *ap)
1499 unsigned long timeout = jiffies + (HZ * 5);
1501 if (ap->flags & ATA_FLAG_SATA_RESET) {
1502 /* issue phy wake/reset */
1503 scr_write_flush(ap, SCR_CONTROL, 0x301);
1504 /* Couldn't find anything in SATA I/II specs, but
1505 * AHCI-1.1 10.4.2 says at least 1 ms. */
1508 scr_write_flush(ap, SCR_CONTROL, 0x300); /* phy wake/clear reset */
1510 /* wait for phy to become ready, if necessary */
1513 sstatus = scr_read(ap, SCR_STATUS);
1514 if ((sstatus & 0xf) != 1)
1516 } while (time_before(jiffies, timeout));
1518 /* print link status */
1519 sata_print_link_status(ap);
1521 /* TODO: phy layer with polling, timeouts, etc. */
1522 if (sata_dev_present(ap))
1525 ata_port_disable(ap);
1527 if (ap->flags & ATA_FLAG_PORT_DISABLED)
1530 if (ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT)) {
1531 ata_port_disable(ap);
1535 ap->cbl = ATA_CBL_SATA;
1539 * sata_phy_reset - Reset SATA bus.
1540 * @ap: SATA port associated with target SATA PHY.
1542 * This function resets the SATA bus, and then probes
1543 * the bus for devices.
1546 * PCI/etc. bus probe sem.
1549 void sata_phy_reset(struct ata_port *ap)
1551 __sata_phy_reset(ap);
1552 if (ap->flags & ATA_FLAG_PORT_DISABLED)
1558 * ata_dev_pair - return other device on cable
1562 * Obtain the other device on the same cable, or if none is
1563 * present NULL is returned
1566 struct ata_device *ata_dev_pair(struct ata_port *ap, struct ata_device *adev)
1568 struct ata_device *pair = &ap->device[1 - adev->devno];
1569 if (!ata_dev_present(pair))
1575 * ata_port_disable - Disable port.
1576 * @ap: Port to be disabled.
1578 * Modify @ap data structure such that the system
1579 * thinks that the entire port is disabled, and should
1580 * never attempt to probe or communicate with devices
1583 * LOCKING: host_set lock, or some other form of
1587 void ata_port_disable(struct ata_port *ap)
1589 ap->device[0].class = ATA_DEV_NONE;
1590 ap->device[1].class = ATA_DEV_NONE;
1591 ap->flags |= ATA_FLAG_PORT_DISABLED;
1595 * This mode timing computation functionality is ported over from
1596 * drivers/ide/ide-timing.h and was originally written by Vojtech Pavlik
1599 * PIO 0-5, MWDMA 0-2 and UDMA 0-6 timings (in nanoseconds).
1600 * These were taken from ATA/ATAPI-6 standard, rev 0a, except
1601 * for PIO 5, which is a nonstandard extension and UDMA6, which
1602 * is currently supported only by Maxtor drives.
1605 static const struct ata_timing ata_timing[] = {
1607 { XFER_UDMA_6, 0, 0, 0, 0, 0, 0, 0, 15 },
1608 { XFER_UDMA_5, 0, 0, 0, 0, 0, 0, 0, 20 },
1609 { XFER_UDMA_4, 0, 0, 0, 0, 0, 0, 0, 30 },
1610 { XFER_UDMA_3, 0, 0, 0, 0, 0, 0, 0, 45 },
1612 { XFER_UDMA_2, 0, 0, 0, 0, 0, 0, 0, 60 },
1613 { XFER_UDMA_1, 0, 0, 0, 0, 0, 0, 0, 80 },
1614 { XFER_UDMA_0, 0, 0, 0, 0, 0, 0, 0, 120 },
1616 /* { XFER_UDMA_SLOW, 0, 0, 0, 0, 0, 0, 0, 150 }, */
1618 { XFER_MW_DMA_2, 25, 0, 0, 0, 70, 25, 120, 0 },
1619 { XFER_MW_DMA_1, 45, 0, 0, 0, 80, 50, 150, 0 },
1620 { XFER_MW_DMA_0, 60, 0, 0, 0, 215, 215, 480, 0 },
1622 { XFER_SW_DMA_2, 60, 0, 0, 0, 120, 120, 240, 0 },
1623 { XFER_SW_DMA_1, 90, 0, 0, 0, 240, 240, 480, 0 },
1624 { XFER_SW_DMA_0, 120, 0, 0, 0, 480, 480, 960, 0 },
1626 /* { XFER_PIO_5, 20, 50, 30, 100, 50, 30, 100, 0 }, */
1627 { XFER_PIO_4, 25, 70, 25, 120, 70, 25, 120, 0 },
1628 { XFER_PIO_3, 30, 80, 70, 180, 80, 70, 180, 0 },
1630 { XFER_PIO_2, 30, 290, 40, 330, 100, 90, 240, 0 },
1631 { XFER_PIO_1, 50, 290, 93, 383, 125, 100, 383, 0 },
1632 { XFER_PIO_0, 70, 290, 240, 600, 165, 150, 600, 0 },
1634 /* { XFER_PIO_SLOW, 120, 290, 240, 960, 290, 240, 960, 0 }, */
1639 #define ENOUGH(v,unit) (((v)-1)/(unit)+1)
1640 #define EZ(v,unit) ((v)?ENOUGH(v,unit):0)
1642 static void ata_timing_quantize(const struct ata_timing *t, struct ata_timing *q, int T, int UT)
1644 q->setup = EZ(t->setup * 1000, T);
1645 q->act8b = EZ(t->act8b * 1000, T);
1646 q->rec8b = EZ(t->rec8b * 1000, T);
1647 q->cyc8b = EZ(t->cyc8b * 1000, T);
1648 q->active = EZ(t->active * 1000, T);
1649 q->recover = EZ(t->recover * 1000, T);
1650 q->cycle = EZ(t->cycle * 1000, T);
1651 q->udma = EZ(t->udma * 1000, UT);
1654 void ata_timing_merge(const struct ata_timing *a, const struct ata_timing *b,
1655 struct ata_timing *m, unsigned int what)
1657 if (what & ATA_TIMING_SETUP ) m->setup = max(a->setup, b->setup);
1658 if (what & ATA_TIMING_ACT8B ) m->act8b = max(a->act8b, b->act8b);
1659 if (what & ATA_TIMING_REC8B ) m->rec8b = max(a->rec8b, b->rec8b);
1660 if (what & ATA_TIMING_CYC8B ) m->cyc8b = max(a->cyc8b, b->cyc8b);
1661 if (what & ATA_TIMING_ACTIVE ) m->active = max(a->active, b->active);
1662 if (what & ATA_TIMING_RECOVER) m->recover = max(a->recover, b->recover);
1663 if (what & ATA_TIMING_CYCLE ) m->cycle = max(a->cycle, b->cycle);
1664 if (what & ATA_TIMING_UDMA ) m->udma = max(a->udma, b->udma);
1667 static const struct ata_timing* ata_timing_find_mode(unsigned short speed)
1669 const struct ata_timing *t;
1671 for (t = ata_timing; t->mode != speed; t++)
1672 if (t->mode == 0xFF)
1677 int ata_timing_compute(struct ata_device *adev, unsigned short speed,
1678 struct ata_timing *t, int T, int UT)
1680 const struct ata_timing *s;
1681 struct ata_timing p;
1687 if (!(s = ata_timing_find_mode(speed)))
1690 memcpy(t, s, sizeof(*s));
1693 * If the drive is an EIDE drive, it can tell us it needs extended
1694 * PIO/MW_DMA cycle timing.
1697 if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE drive */
1698 memset(&p, 0, sizeof(p));
1699 if(speed >= XFER_PIO_0 && speed <= XFER_SW_DMA_0) {
1700 if (speed <= XFER_PIO_2) p.cycle = p.cyc8b = adev->id[ATA_ID_EIDE_PIO];
1701 else p.cycle = p.cyc8b = adev->id[ATA_ID_EIDE_PIO_IORDY];
1702 } else if(speed >= XFER_MW_DMA_0 && speed <= XFER_MW_DMA_2) {
1703 p.cycle = adev->id[ATA_ID_EIDE_DMA_MIN];
1705 ata_timing_merge(&p, t, t, ATA_TIMING_CYCLE | ATA_TIMING_CYC8B);
1709 * Convert the timing to bus clock counts.
1712 ata_timing_quantize(t, t, T, UT);
1715 * Even in DMA/UDMA modes we still use PIO access for IDENTIFY,
1716 * S.M.A.R.T * and some other commands. We have to ensure that the
1717 * DMA cycle timing is slower/equal than the fastest PIO timing.
1720 if (speed > XFER_PIO_4) {
1721 ata_timing_compute(adev, adev->pio_mode, &p, T, UT);
1722 ata_timing_merge(&p, t, t, ATA_TIMING_ALL);
1726 * Lengthen active & recovery time so that cycle time is correct.
1729 if (t->act8b + t->rec8b < t->cyc8b) {
1730 t->act8b += (t->cyc8b - (t->act8b + t->rec8b)) / 2;
1731 t->rec8b = t->cyc8b - t->act8b;
1734 if (t->active + t->recover < t->cycle) {
1735 t->active += (t->cycle - (t->active + t->recover)) / 2;
1736 t->recover = t->cycle - t->active;
1742 static int ata_dev_set_mode(struct ata_port *ap, struct ata_device *dev)
1744 unsigned int err_mask;
1747 if (dev->xfer_shift == ATA_SHIFT_PIO)
1748 dev->flags |= ATA_DFLAG_PIO;
1750 err_mask = ata_dev_set_xfermode(ap, dev);
1753 "ata%u: failed to set xfermode (err_mask=0x%x)\n",
1758 rc = ata_dev_revalidate(ap, dev, 0);
1761 "ata%u: failed to revalidate after set xfermode\n",
1766 DPRINTK("xfer_shift=%u, xfer_mode=0x%x\n",
1767 dev->xfer_shift, (int)dev->xfer_mode);
1769 printk(KERN_INFO "ata%u: dev %u configured for %s\n",
1771 ata_mode_string(ata_xfer_mode2mask(dev->xfer_mode)));
1775 static int ata_host_set_pio(struct ata_port *ap)
1779 for (i = 0; i < ATA_MAX_DEVICES; i++) {
1780 struct ata_device *dev = &ap->device[i];
1782 if (!ata_dev_present(dev))
1785 if (!dev->pio_mode) {
1786 printk(KERN_WARNING "ata%u: no PIO support for device %d.\n", ap->id, i);
1790 dev->xfer_mode = dev->pio_mode;
1791 dev->xfer_shift = ATA_SHIFT_PIO;
1792 if (ap->ops->set_piomode)
1793 ap->ops->set_piomode(ap, dev);
1799 static void ata_host_set_dma(struct ata_port *ap)
1803 for (i = 0; i < ATA_MAX_DEVICES; i++) {
1804 struct ata_device *dev = &ap->device[i];
1806 if (!ata_dev_present(dev) || !dev->dma_mode)
1809 dev->xfer_mode = dev->dma_mode;
1810 dev->xfer_shift = ata_xfer_mode2shift(dev->dma_mode);
1811 if (ap->ops->set_dmamode)
1812 ap->ops->set_dmamode(ap, dev);
1817 * ata_set_mode - Program timings and issue SET FEATURES - XFER
1818 * @ap: port on which timings will be programmed
1820 * Set ATA device disk transfer mode (PIO3, UDMA6, etc.).
1823 * PCI/etc. bus probe sem.
1825 static void ata_set_mode(struct ata_port *ap)
1829 /* step 1: calculate xfer_mask */
1830 for (i = 0; i < ATA_MAX_DEVICES; i++) {
1831 struct ata_device *dev = &ap->device[i];
1832 unsigned int pio_mask, dma_mask;
1834 if (!ata_dev_present(dev))
1837 ata_dev_xfermask(ap, dev);
1839 /* TODO: let LLDD filter dev->*_mask here */
1841 pio_mask = ata_pack_xfermask(dev->pio_mask, 0, 0);
1842 dma_mask = ata_pack_xfermask(0, dev->mwdma_mask, dev->udma_mask);
1843 dev->pio_mode = ata_xfer_mask2mode(pio_mask);
1844 dev->dma_mode = ata_xfer_mask2mode(dma_mask);
1847 /* step 2: always set host PIO timings */
1848 rc = ata_host_set_pio(ap);
1852 /* step 3: set host DMA timings */
1853 ata_host_set_dma(ap);
1855 /* step 4: update devices' xfer mode */
1856 for (i = 0; i < ATA_MAX_DEVICES; i++) {
1857 struct ata_device *dev = &ap->device[i];
1859 if (!ata_dev_present(dev))
1862 if (ata_dev_set_mode(ap, dev))
1866 if (ap->ops->post_set_mode)
1867 ap->ops->post_set_mode(ap);
1872 ata_port_disable(ap);
1876 * ata_tf_to_host - issue ATA taskfile to host controller
1877 * @ap: port to which command is being issued
1878 * @tf: ATA taskfile register set
1880 * Issues ATA taskfile register set to ATA host controller,
1881 * with proper synchronization with interrupt handler and
1885 * spin_lock_irqsave(host_set lock)
1888 static inline void ata_tf_to_host(struct ata_port *ap,
1889 const struct ata_taskfile *tf)
1891 ap->ops->tf_load(ap, tf);
1892 ap->ops->exec_command(ap, tf);
1896 * ata_busy_sleep - sleep until BSY clears, or timeout
1897 * @ap: port containing status register to be polled
1898 * @tmout_pat: impatience timeout
1899 * @tmout: overall timeout
1901 * Sleep until ATA Status register bit BSY clears,
1902 * or a timeout occurs.
1907 unsigned int ata_busy_sleep (struct ata_port *ap,
1908 unsigned long tmout_pat, unsigned long tmout)
1910 unsigned long timer_start, timeout;
1913 status = ata_busy_wait(ap, ATA_BUSY, 300);
1914 timer_start = jiffies;
1915 timeout = timer_start + tmout_pat;
1916 while ((status & ATA_BUSY) && (time_before(jiffies, timeout))) {
1918 status = ata_busy_wait(ap, ATA_BUSY, 3);
1921 if (status & ATA_BUSY)
1922 printk(KERN_WARNING "ata%u is slow to respond, "
1923 "please be patient\n", ap->id);
1925 timeout = timer_start + tmout;
1926 while ((status & ATA_BUSY) && (time_before(jiffies, timeout))) {
1928 status = ata_chk_status(ap);
1931 if (status & ATA_BUSY) {
1932 printk(KERN_ERR "ata%u failed to respond (%lu secs)\n",
1933 ap->id, tmout / HZ);
1940 static void ata_bus_post_reset(struct ata_port *ap, unsigned int devmask)
1942 struct ata_ioports *ioaddr = &ap->ioaddr;
1943 unsigned int dev0 = devmask & (1 << 0);
1944 unsigned int dev1 = devmask & (1 << 1);
1945 unsigned long timeout;
1947 /* if device 0 was found in ata_devchk, wait for its
1951 ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT);
1953 /* if device 1 was found in ata_devchk, wait for
1954 * register access, then wait for BSY to clear
1956 timeout = jiffies + ATA_TMOUT_BOOT;
1960 ap->ops->dev_select(ap, 1);
1961 if (ap->flags & ATA_FLAG_MMIO) {
1962 nsect = readb((void __iomem *) ioaddr->nsect_addr);
1963 lbal = readb((void __iomem *) ioaddr->lbal_addr);
1965 nsect = inb(ioaddr->nsect_addr);
1966 lbal = inb(ioaddr->lbal_addr);
1968 if ((nsect == 1) && (lbal == 1))
1970 if (time_after(jiffies, timeout)) {
1974 msleep(50); /* give drive a breather */
1977 ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT);
1979 /* is all this really necessary? */
1980 ap->ops->dev_select(ap, 0);
1982 ap->ops->dev_select(ap, 1);
1984 ap->ops->dev_select(ap, 0);
1987 static unsigned int ata_bus_softreset(struct ata_port *ap,
1988 unsigned int devmask)
1990 struct ata_ioports *ioaddr = &ap->ioaddr;
1992 DPRINTK("ata%u: bus reset via SRST\n", ap->id);
1994 /* software reset. causes dev0 to be selected */
1995 if (ap->flags & ATA_FLAG_MMIO) {
1996 writeb(ap->ctl, (void __iomem *) ioaddr->ctl_addr);
1997 udelay(20); /* FIXME: flush */
1998 writeb(ap->ctl | ATA_SRST, (void __iomem *) ioaddr->ctl_addr);
1999 udelay(20); /* FIXME: flush */
2000 writeb(ap->ctl, (void __iomem *) ioaddr->ctl_addr);
2002 outb(ap->ctl, ioaddr->ctl_addr);
2004 outb(ap->ctl | ATA_SRST, ioaddr->ctl_addr);
2006 outb(ap->ctl, ioaddr->ctl_addr);
2009 /* spec mandates ">= 2ms" before checking status.
2010 * We wait 150ms, because that was the magic delay used for
2011 * ATAPI devices in Hale Landis's ATADRVR, for the period of time
2012 * between when the ATA command register is written, and then
2013 * status is checked. Because waiting for "a while" before
2014 * checking status is fine, post SRST, we perform this magic
2015 * delay here as well.
2017 * Old drivers/ide uses the 2mS rule and then waits for ready
2022 /* Before we perform post reset processing we want to see if
2023 the bus shows 0xFF because the odd clown forgets the D7 pulldown
2026 if (ata_check_status(ap) == 0xFF)
2027 return 1; /* Positive is failure for some reason */
2029 ata_bus_post_reset(ap, devmask);
2035 * ata_bus_reset - reset host port and associated ATA channel
2036 * @ap: port to reset
2038 * This is typically the first time we actually start issuing
2039 * commands to the ATA channel. We wait for BSY to clear, then
2040 * issue EXECUTE DEVICE DIAGNOSTIC command, polling for its
2041 * result. Determine what devices, if any, are on the channel
2042 * by looking at the device 0/1 error register. Look at the signature
2043 * stored in each device's taskfile registers, to determine if
2044 * the device is ATA or ATAPI.
2047 * PCI/etc. bus probe sem.
2048 * Obtains host_set lock.
2051 * Sets ATA_FLAG_PORT_DISABLED if bus reset fails.
2054 void ata_bus_reset(struct ata_port *ap)
2056 struct ata_ioports *ioaddr = &ap->ioaddr;
2057 unsigned int slave_possible = ap->flags & ATA_FLAG_SLAVE_POSS;
2059 unsigned int dev0, dev1 = 0, devmask = 0;
2061 DPRINTK("ENTER, host %u, port %u\n", ap->id, ap->port_no);
2063 /* determine if device 0/1 are present */
2064 if (ap->flags & ATA_FLAG_SATA_RESET)
2067 dev0 = ata_devchk(ap, 0);
2069 dev1 = ata_devchk(ap, 1);
2073 devmask |= (1 << 0);
2075 devmask |= (1 << 1);
2077 /* select device 0 again */
2078 ap->ops->dev_select(ap, 0);
2080 /* issue bus reset */
2081 if (ap->flags & ATA_FLAG_SRST)
2082 if (ata_bus_softreset(ap, devmask))
2086 * determine by signature whether we have ATA or ATAPI devices
2088 ap->device[0].class = ata_dev_try_classify(ap, 0, &err);
2089 if ((slave_possible) && (err != 0x81))
2090 ap->device[1].class = ata_dev_try_classify(ap, 1, &err);
2092 /* re-enable interrupts */
2093 if (ap->ioaddr.ctl_addr) /* FIXME: hack. create a hook instead */
2096 /* is double-select really necessary? */
2097 if (ap->device[1].class != ATA_DEV_NONE)
2098 ap->ops->dev_select(ap, 1);
2099 if (ap->device[0].class != ATA_DEV_NONE)
2100 ap->ops->dev_select(ap, 0);
2102 /* if no devices were detected, disable this port */
2103 if ((ap->device[0].class == ATA_DEV_NONE) &&
2104 (ap->device[1].class == ATA_DEV_NONE))
2107 if (ap->flags & (ATA_FLAG_SATA_RESET | ATA_FLAG_SRST)) {
2108 /* set up device control for ATA_FLAG_SATA_RESET */
2109 if (ap->flags & ATA_FLAG_MMIO)
2110 writeb(ap->ctl, (void __iomem *) ioaddr->ctl_addr);
2112 outb(ap->ctl, ioaddr->ctl_addr);
2119 printk(KERN_ERR "ata%u: disabling port\n", ap->id);
2120 ap->ops->port_disable(ap);
2125 static int sata_phy_resume(struct ata_port *ap)
2127 unsigned long timeout = jiffies + (HZ * 5);
2130 scr_write_flush(ap, SCR_CONTROL, 0x300);
2132 /* Wait for phy to become ready, if necessary. */
2135 sstatus = scr_read(ap, SCR_STATUS);
2136 if ((sstatus & 0xf) != 1)
2138 } while (time_before(jiffies, timeout));
2144 * ata_std_probeinit - initialize probing
2145 * @ap: port to be probed
2147 * @ap is about to be probed. Initialize it. This function is
2148 * to be used as standard callback for ata_drive_probe_reset().
2150 * NOTE!!! Do not use this function as probeinit if a low level
2151 * driver implements only hardreset. Just pass NULL as probeinit
2152 * in that case. Using this function is probably okay but doing
2153 * so makes reset sequence different from the original
2154 * ->phy_reset implementation and Jeff nervous. :-P
2156 extern void ata_std_probeinit(struct ata_port *ap)
2158 if (ap->flags & ATA_FLAG_SATA && ap->ops->scr_read) {
2159 sata_phy_resume(ap);
2160 if (sata_dev_present(ap))
2161 ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT);
2166 * ata_std_softreset - reset host port via ATA SRST
2167 * @ap: port to reset
2168 * @verbose: fail verbosely
2169 * @classes: resulting classes of attached devices
2171 * Reset host port using ATA SRST. This function is to be used
2172 * as standard callback for ata_drive_*_reset() functions.
2175 * Kernel thread context (may sleep)
2178 * 0 on success, -errno otherwise.
2180 int ata_std_softreset(struct ata_port *ap, int verbose, unsigned int *classes)
2182 unsigned int slave_possible = ap->flags & ATA_FLAG_SLAVE_POSS;
2183 unsigned int devmask = 0, err_mask;
2188 if (ap->ops->scr_read && !sata_dev_present(ap)) {
2189 classes[0] = ATA_DEV_NONE;
2193 /* determine if device 0/1 are present */
2194 if (ata_devchk(ap, 0))
2195 devmask |= (1 << 0);
2196 if (slave_possible && ata_devchk(ap, 1))
2197 devmask |= (1 << 1);
2199 /* select device 0 again */
2200 ap->ops->dev_select(ap, 0);
2202 /* issue bus reset */
2203 DPRINTK("about to softreset, devmask=%x\n", devmask);
2204 err_mask = ata_bus_softreset(ap, devmask);
2207 printk(KERN_ERR "ata%u: SRST failed (err_mask=0x%x)\n",
2210 DPRINTK("EXIT, softreset failed (err_mask=0x%x)\n",
2215 /* determine by signature whether we have ATA or ATAPI devices */
2216 classes[0] = ata_dev_try_classify(ap, 0, &err);
2217 if (slave_possible && err != 0x81)
2218 classes[1] = ata_dev_try_classify(ap, 1, &err);
2221 DPRINTK("EXIT, classes[0]=%u [1]=%u\n", classes[0], classes[1]);
2226 * sata_std_hardreset - reset host port via SATA phy reset
2227 * @ap: port to reset
2228 * @verbose: fail verbosely
2229 * @class: resulting class of attached device
2231 * SATA phy-reset host port using DET bits of SControl register.
2232 * This function is to be used as standard callback for
2233 * ata_drive_*_reset().
2236 * Kernel thread context (may sleep)
2239 * 0 on success, -errno otherwise.
2241 int sata_std_hardreset(struct ata_port *ap, int verbose, unsigned int *class)
2245 /* Issue phy wake/reset */
2246 scr_write_flush(ap, SCR_CONTROL, 0x301);
2249 * Couldn't find anything in SATA I/II specs, but AHCI-1.1
2250 * 10.4.2 says at least 1 ms.
2254 /* Bring phy back */
2255 sata_phy_resume(ap);
2257 /* TODO: phy layer with polling, timeouts, etc. */
2258 if (!sata_dev_present(ap)) {
2259 *class = ATA_DEV_NONE;
2260 DPRINTK("EXIT, link offline\n");
2264 if (ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT)) {
2266 printk(KERN_ERR "ata%u: COMRESET failed "
2267 "(device not ready)\n", ap->id);
2269 DPRINTK("EXIT, device not ready\n");
2273 ap->ops->dev_select(ap, 0); /* probably unnecessary */
2275 *class = ata_dev_try_classify(ap, 0, NULL);
2277 DPRINTK("EXIT, class=%u\n", *class);
2282 * ata_std_postreset - standard postreset callback
2283 * @ap: the target ata_port
2284 * @classes: classes of attached devices
2286 * This function is invoked after a successful reset. Note that
2287 * the device might have been reset more than once using
2288 * different reset methods before postreset is invoked.
2290 * This function is to be used as standard callback for
2291 * ata_drive_*_reset().
2294 * Kernel thread context (may sleep)
2296 void ata_std_postreset(struct ata_port *ap, unsigned int *classes)
2300 /* set cable type if it isn't already set */
2301 if (ap->cbl == ATA_CBL_NONE && ap->flags & ATA_FLAG_SATA)
2302 ap->cbl = ATA_CBL_SATA;
2304 /* print link status */
2305 if (ap->cbl == ATA_CBL_SATA)
2306 sata_print_link_status(ap);
2308 /* re-enable interrupts */
2309 if (ap->ioaddr.ctl_addr) /* FIXME: hack. create a hook instead */
2312 /* is double-select really necessary? */
2313 if (classes[0] != ATA_DEV_NONE)
2314 ap->ops->dev_select(ap, 1);
2315 if (classes[1] != ATA_DEV_NONE)
2316 ap->ops->dev_select(ap, 0);
2318 /* bail out if no device is present */
2319 if (classes[0] == ATA_DEV_NONE && classes[1] == ATA_DEV_NONE) {
2320 DPRINTK("EXIT, no device\n");
2324 /* set up device control */
2325 if (ap->ioaddr.ctl_addr) {
2326 if (ap->flags & ATA_FLAG_MMIO)
2327 writeb(ap->ctl, (void __iomem *) ap->ioaddr.ctl_addr);
2329 outb(ap->ctl, ap->ioaddr.ctl_addr);
2336 * ata_std_probe_reset - standard probe reset method
2337 * @ap: prot to perform probe-reset
2338 * @classes: resulting classes of attached devices
2340 * The stock off-the-shelf ->probe_reset method.
2343 * Kernel thread context (may sleep)
2346 * 0 on success, -errno otherwise.
2348 int ata_std_probe_reset(struct ata_port *ap, unsigned int *classes)
2350 ata_reset_fn_t hardreset;
2353 if (ap->flags & ATA_FLAG_SATA && ap->ops->scr_read)
2354 hardreset = sata_std_hardreset;
2356 return ata_drive_probe_reset(ap, ata_std_probeinit,
2357 ata_std_softreset, hardreset,
2358 ata_std_postreset, classes);
2361 static int do_probe_reset(struct ata_port *ap, ata_reset_fn_t reset,
2362 ata_postreset_fn_t postreset,
2363 unsigned int *classes)
2367 for (i = 0; i < ATA_MAX_DEVICES; i++)
2368 classes[i] = ATA_DEV_UNKNOWN;
2370 rc = reset(ap, 0, classes);
2374 /* If any class isn't ATA_DEV_UNKNOWN, consider classification
2375 * is complete and convert all ATA_DEV_UNKNOWN to
2378 for (i = 0; i < ATA_MAX_DEVICES; i++)
2379 if (classes[i] != ATA_DEV_UNKNOWN)
2382 if (i < ATA_MAX_DEVICES)
2383 for (i = 0; i < ATA_MAX_DEVICES; i++)
2384 if (classes[i] == ATA_DEV_UNKNOWN)
2385 classes[i] = ATA_DEV_NONE;
2388 postreset(ap, classes);
2390 return classes[0] != ATA_DEV_UNKNOWN ? 0 : -ENODEV;
2394 * ata_drive_probe_reset - Perform probe reset with given methods
2395 * @ap: port to reset
2396 * @probeinit: probeinit method (can be NULL)
2397 * @softreset: softreset method (can be NULL)
2398 * @hardreset: hardreset method (can be NULL)
2399 * @postreset: postreset method (can be NULL)
2400 * @classes: resulting classes of attached devices
2402 * Reset the specified port and classify attached devices using
2403 * given methods. This function prefers softreset but tries all
2404 * possible reset sequences to reset and classify devices. This
2405 * function is intended to be used for constructing ->probe_reset
2406 * callback by low level drivers.
2408 * Reset methods should follow the following rules.
2410 * - Return 0 on sucess, -errno on failure.
2411 * - If classification is supported, fill classes[] with
2412 * recognized class codes.
2413 * - If classification is not supported, leave classes[] alone.
2414 * - If verbose is non-zero, print error message on failure;
2415 * otherwise, shut up.
2418 * Kernel thread context (may sleep)
2421 * 0 on success, -EINVAL if no reset method is avaliable, -ENODEV
2422 * if classification fails, and any error code from reset
2425 int ata_drive_probe_reset(struct ata_port *ap, ata_probeinit_fn_t probeinit,
2426 ata_reset_fn_t softreset, ata_reset_fn_t hardreset,
2427 ata_postreset_fn_t postreset, unsigned int *classes)
2435 rc = do_probe_reset(ap, softreset, postreset, classes);
2443 rc = do_probe_reset(ap, hardreset, postreset, classes);
2444 if (rc == 0 || rc != -ENODEV)
2448 rc = do_probe_reset(ap, softreset, postreset, classes);
2454 * ata_dev_same_device - Determine whether new ID matches configured device
2455 * @ap: port on which the device to compare against resides
2456 * @dev: device to compare against
2457 * @new_class: class of the new device
2458 * @new_id: IDENTIFY page of the new device
2460 * Compare @new_class and @new_id against @dev and determine
2461 * whether @dev is the device indicated by @new_class and
2468 * 1 if @dev matches @new_class and @new_id, 0 otherwise.
2470 static int ata_dev_same_device(struct ata_port *ap, struct ata_device *dev,
2471 unsigned int new_class, const u16 *new_id)
2473 const u16 *old_id = dev->id;
2474 unsigned char model[2][41], serial[2][21];
2477 if (dev->class != new_class) {
2479 "ata%u: dev %u class mismatch %d != %d\n",
2480 ap->id, dev->devno, dev->class, new_class);
2484 ata_id_c_string(old_id, model[0], ATA_ID_PROD_OFS, sizeof(model[0]));
2485 ata_id_c_string(new_id, model[1], ATA_ID_PROD_OFS, sizeof(model[1]));
2486 ata_id_c_string(old_id, serial[0], ATA_ID_SERNO_OFS, sizeof(serial[0]));
2487 ata_id_c_string(new_id, serial[1], ATA_ID_SERNO_OFS, sizeof(serial[1]));
2488 new_n_sectors = ata_id_n_sectors(new_id);
2490 if (strcmp(model[0], model[1])) {
2492 "ata%u: dev %u model number mismatch '%s' != '%s'\n",
2493 ap->id, dev->devno, model[0], model[1]);
2497 if (strcmp(serial[0], serial[1])) {
2499 "ata%u: dev %u serial number mismatch '%s' != '%s'\n",
2500 ap->id, dev->devno, serial[0], serial[1]);
2504 if (dev->class == ATA_DEV_ATA && dev->n_sectors != new_n_sectors) {
2506 "ata%u: dev %u n_sectors mismatch %llu != %llu\n",
2507 ap->id, dev->devno, (unsigned long long)dev->n_sectors,
2508 (unsigned long long)new_n_sectors);
2516 * ata_dev_revalidate - Revalidate ATA device
2517 * @ap: port on which the device to revalidate resides
2518 * @dev: device to revalidate
2519 * @post_reset: is this revalidation after reset?
2521 * Re-read IDENTIFY page and make sure @dev is still attached to
2525 * Kernel thread context (may sleep)
2528 * 0 on success, negative errno otherwise
2530 int ata_dev_revalidate(struct ata_port *ap, struct ata_device *dev,
2537 if (!ata_dev_present(dev))
2543 /* allocate & read ID data */
2544 rc = ata_dev_read_id(ap, dev, &class, post_reset, &id);
2548 /* is the device still there? */
2549 if (!ata_dev_same_device(ap, dev, class, id)) {
2557 /* configure device according to the new ID */
2558 return ata_dev_configure(ap, dev, 0);
2561 printk(KERN_ERR "ata%u: dev %u revalidation failed (errno=%d)\n",
2562 ap->id, dev->devno, rc);
2567 static const char * const ata_dma_blacklist [] = {
2568 "WDC AC11000H", NULL,
2569 "WDC AC22100H", NULL,
2570 "WDC AC32500H", NULL,
2571 "WDC AC33100H", NULL,
2572 "WDC AC31600H", NULL,
2573 "WDC AC32100H", "24.09P07",
2574 "WDC AC23200L", "21.10N21",
2575 "Compaq CRD-8241B", NULL,
2580 "SanDisk SDP3B", NULL,
2581 "SanDisk SDP3B-64", NULL,
2582 "SANYO CD-ROM CRD", NULL,
2583 "HITACHI CDR-8", NULL,
2584 "HITACHI CDR-8335", NULL,
2585 "HITACHI CDR-8435", NULL,
2586 "Toshiba CD-ROM XM-6202B", NULL,
2587 "TOSHIBA CD-ROM XM-1702BC", NULL,
2589 "E-IDE CD-ROM CR-840", NULL,
2590 "CD-ROM Drive/F5A", NULL,
2591 "WPI CDD-820", NULL,
2592 "SAMSUNG CD-ROM SC-148C", NULL,
2593 "SAMSUNG CD-ROM SC", NULL,
2594 "SanDisk SDP3B-64", NULL,
2595 "ATAPI CD-ROM DRIVE 40X MAXIMUM",NULL,
2596 "_NEC DV5800A", NULL,
2597 "SAMSUNG CD-ROM SN-124", "N001"
2600 static int ata_strim(char *s, size_t len)
2602 len = strnlen(s, len);
2604 /* ATAPI specifies that empty space is blank-filled; remove blanks */
2605 while ((len > 0) && (s[len - 1] == ' ')) {
2612 static int ata_dma_blacklisted(const struct ata_device *dev)
2614 unsigned char model_num[40];
2615 unsigned char model_rev[16];
2616 unsigned int nlen, rlen;
2619 ata_id_string(dev->id, model_num, ATA_ID_PROD_OFS,
2621 ata_id_string(dev->id, model_rev, ATA_ID_FW_REV_OFS,
2623 nlen = ata_strim(model_num, sizeof(model_num));
2624 rlen = ata_strim(model_rev, sizeof(model_rev));
2626 for (i = 0; i < ARRAY_SIZE(ata_dma_blacklist); i += 2) {
2627 if (!strncmp(ata_dma_blacklist[i], model_num, nlen)) {
2628 if (ata_dma_blacklist[i+1] == NULL)
2630 if (!strncmp(ata_dma_blacklist[i], model_rev, rlen))
2638 * ata_dev_xfermask - Compute supported xfermask of the given device
2639 * @ap: Port on which the device to compute xfermask for resides
2640 * @dev: Device to compute xfermask for
2642 * Compute supported xfermask of @dev and store it in
2643 * dev->*_mask. This function is responsible for applying all
2644 * known limits including host controller limits, device
2650 static void ata_dev_xfermask(struct ata_port *ap, struct ata_device *dev)
2652 unsigned long xfer_mask;
2655 xfer_mask = ata_pack_xfermask(ap->pio_mask, ap->mwdma_mask,
2658 /* use port-wide xfermask for now */
2659 for (i = 0; i < ATA_MAX_DEVICES; i++) {
2660 struct ata_device *d = &ap->device[i];
2661 if (!ata_dev_present(d))
2663 xfer_mask &= ata_pack_xfermask(d->pio_mask, d->mwdma_mask,
2665 xfer_mask &= ata_id_xfermask(d->id);
2666 if (ata_dma_blacklisted(d))
2667 xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA);
2670 if (ata_dma_blacklisted(dev))
2671 printk(KERN_WARNING "ata%u: dev %u is on DMA blacklist, "
2672 "disabling DMA\n", ap->id, dev->devno);
2674 ata_unpack_xfermask(xfer_mask, &dev->pio_mask, &dev->mwdma_mask,
2679 * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command
2680 * @ap: Port associated with device @dev
2681 * @dev: Device to which command will be sent
2683 * Issue SET FEATURES - XFER MODE command to device @dev
2687 * PCI/etc. bus probe sem.
2690 * 0 on success, AC_ERR_* mask otherwise.
2693 static unsigned int ata_dev_set_xfermode(struct ata_port *ap,
2694 struct ata_device *dev)
2696 struct ata_taskfile tf;
2697 unsigned int err_mask;
2699 /* set up set-features taskfile */
2700 DPRINTK("set features - xfer mode\n");
2702 ata_tf_init(ap, &tf, dev->devno);
2703 tf.command = ATA_CMD_SET_FEATURES;
2704 tf.feature = SETFEATURES_XFER;
2705 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2706 tf.protocol = ATA_PROT_NODATA;
2707 tf.nsect = dev->xfer_mode;
2709 err_mask = ata_exec_internal(ap, dev, &tf, DMA_NONE, NULL, 0);
2711 DPRINTK("EXIT, err_mask=%x\n", err_mask);
2716 * ata_dev_init_params - Issue INIT DEV PARAMS command
2717 * @ap: Port associated with device @dev
2718 * @dev: Device to which command will be sent
2721 * Kernel thread context (may sleep)
2724 * 0 on success, AC_ERR_* mask otherwise.
2727 static unsigned int ata_dev_init_params(struct ata_port *ap,
2728 struct ata_device *dev)
2730 struct ata_taskfile tf;
2731 unsigned int err_mask;
2732 u16 sectors = dev->id[6];
2733 u16 heads = dev->id[3];
2735 /* Number of sectors per track 1-255. Number of heads 1-16 */
2736 if (sectors < 1 || sectors > 255 || heads < 1 || heads > 16)
2739 /* set up init dev params taskfile */
2740 DPRINTK("init dev params \n");
2742 ata_tf_init(ap, &tf, dev->devno);
2743 tf.command = ATA_CMD_INIT_DEV_PARAMS;
2744 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2745 tf.protocol = ATA_PROT_NODATA;
2747 tf.device |= (heads - 1) & 0x0f; /* max head = num. of heads - 1 */
2749 err_mask = ata_exec_internal(ap, dev, &tf, DMA_NONE, NULL, 0);
2751 DPRINTK("EXIT, err_mask=%x\n", err_mask);
2756 * ata_sg_clean - Unmap DMA memory associated with command
2757 * @qc: Command containing DMA memory to be released
2759 * Unmap all mapped DMA memory associated with this command.
2762 * spin_lock_irqsave(host_set lock)
2765 static void ata_sg_clean(struct ata_queued_cmd *qc)
2767 struct ata_port *ap = qc->ap;
2768 struct scatterlist *sg = qc->__sg;
2769 int dir = qc->dma_dir;
2770 void *pad_buf = NULL;
2772 WARN_ON(!(qc->flags & ATA_QCFLAG_DMAMAP));
2773 WARN_ON(sg == NULL);
2775 if (qc->flags & ATA_QCFLAG_SINGLE)
2776 WARN_ON(qc->n_elem > 1);
2778 VPRINTK("unmapping %u sg elements\n", qc->n_elem);
2780 /* if we padded the buffer out to 32-bit bound, and data
2781 * xfer direction is from-device, we must copy from the
2782 * pad buffer back into the supplied buffer
2784 if (qc->pad_len && !(qc->tf.flags & ATA_TFLAG_WRITE))
2785 pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ);
2787 if (qc->flags & ATA_QCFLAG_SG) {
2789 dma_unmap_sg(ap->dev, sg, qc->n_elem, dir);
2790 /* restore last sg */
2791 sg[qc->orig_n_elem - 1].length += qc->pad_len;
2793 struct scatterlist *psg = &qc->pad_sgent;
2794 void *addr = kmap_atomic(psg->page, KM_IRQ0);
2795 memcpy(addr + psg->offset, pad_buf, qc->pad_len);
2796 kunmap_atomic(addr, KM_IRQ0);
2800 dma_unmap_single(ap->dev,
2801 sg_dma_address(&sg[0]), sg_dma_len(&sg[0]),
2804 sg->length += qc->pad_len;
2806 memcpy(qc->buf_virt + sg->length - qc->pad_len,
2807 pad_buf, qc->pad_len);
2810 qc->flags &= ~ATA_QCFLAG_DMAMAP;
2815 * ata_fill_sg - Fill PCI IDE PRD table
2816 * @qc: Metadata associated with taskfile to be transferred
2818 * Fill PCI IDE PRD (scatter-gather) table with segments
2819 * associated with the current disk command.
2822 * spin_lock_irqsave(host_set lock)
2825 static void ata_fill_sg(struct ata_queued_cmd *qc)
2827 struct ata_port *ap = qc->ap;
2828 struct scatterlist *sg;
2831 WARN_ON(qc->__sg == NULL);
2832 WARN_ON(qc->n_elem == 0 && qc->pad_len == 0);
2835 ata_for_each_sg(sg, qc) {
2839 /* determine if physical DMA addr spans 64K boundary.
2840 * Note h/w doesn't support 64-bit, so we unconditionally
2841 * truncate dma_addr_t to u32.
2843 addr = (u32) sg_dma_address(sg);
2844 sg_len = sg_dma_len(sg);
2847 offset = addr & 0xffff;
2849 if ((offset + sg_len) > 0x10000)
2850 len = 0x10000 - offset;
2852 ap->prd[idx].addr = cpu_to_le32(addr);
2853 ap->prd[idx].flags_len = cpu_to_le32(len & 0xffff);
2854 VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", idx, addr, len);
2863 ap->prd[idx - 1].flags_len |= cpu_to_le32(ATA_PRD_EOT);
2866 * ata_check_atapi_dma - Check whether ATAPI DMA can be supported
2867 * @qc: Metadata associated with taskfile to check
2869 * Allow low-level driver to filter ATA PACKET commands, returning
2870 * a status indicating whether or not it is OK to use DMA for the
2871 * supplied PACKET command.
2874 * spin_lock_irqsave(host_set lock)
2876 * RETURNS: 0 when ATAPI DMA can be used
2879 int ata_check_atapi_dma(struct ata_queued_cmd *qc)
2881 struct ata_port *ap = qc->ap;
2882 int rc = 0; /* Assume ATAPI DMA is OK by default */
2884 if (ap->ops->check_atapi_dma)
2885 rc = ap->ops->check_atapi_dma(qc);
2890 * ata_qc_prep - Prepare taskfile for submission
2891 * @qc: Metadata associated with taskfile to be prepared
2893 * Prepare ATA taskfile for submission.
2896 * spin_lock_irqsave(host_set lock)
2898 void ata_qc_prep(struct ata_queued_cmd *qc)
2900 if (!(qc->flags & ATA_QCFLAG_DMAMAP))
2906 void ata_noop_qc_prep(struct ata_queued_cmd *qc) { }
2909 * ata_sg_init_one - Associate command with memory buffer
2910 * @qc: Command to be associated
2911 * @buf: Memory buffer
2912 * @buflen: Length of memory buffer, in bytes.
2914 * Initialize the data-related elements of queued_cmd @qc
2915 * to point to a single memory buffer, @buf of byte length @buflen.
2918 * spin_lock_irqsave(host_set lock)
2921 void ata_sg_init_one(struct ata_queued_cmd *qc, void *buf, unsigned int buflen)
2923 struct scatterlist *sg;
2925 qc->flags |= ATA_QCFLAG_SINGLE;
2927 memset(&qc->sgent, 0, sizeof(qc->sgent));
2928 qc->__sg = &qc->sgent;
2930 qc->orig_n_elem = 1;
2934 sg_init_one(sg, buf, buflen);
2938 * ata_sg_init - Associate command with scatter-gather table.
2939 * @qc: Command to be associated
2940 * @sg: Scatter-gather table.
2941 * @n_elem: Number of elements in s/g table.
2943 * Initialize the data-related elements of queued_cmd @qc
2944 * to point to a scatter-gather table @sg, containing @n_elem
2948 * spin_lock_irqsave(host_set lock)
2951 void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
2952 unsigned int n_elem)
2954 qc->flags |= ATA_QCFLAG_SG;
2956 qc->n_elem = n_elem;
2957 qc->orig_n_elem = n_elem;
2961 * ata_sg_setup_one - DMA-map the memory buffer associated with a command.
2962 * @qc: Command with memory buffer to be mapped.
2964 * DMA-map the memory buffer associated with queued_cmd @qc.
2967 * spin_lock_irqsave(host_set lock)
2970 * Zero on success, negative on error.
2973 static int ata_sg_setup_one(struct ata_queued_cmd *qc)
2975 struct ata_port *ap = qc->ap;
2976 int dir = qc->dma_dir;
2977 struct scatterlist *sg = qc->__sg;
2978 dma_addr_t dma_address;
2981 /* we must lengthen transfers to end on a 32-bit boundary */
2982 qc->pad_len = sg->length & 3;
2984 void *pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ);
2985 struct scatterlist *psg = &qc->pad_sgent;
2987 WARN_ON(qc->dev->class != ATA_DEV_ATAPI);
2989 memset(pad_buf, 0, ATA_DMA_PAD_SZ);
2991 if (qc->tf.flags & ATA_TFLAG_WRITE)
2992 memcpy(pad_buf, qc->buf_virt + sg->length - qc->pad_len,
2995 sg_dma_address(psg) = ap->pad_dma + (qc->tag * ATA_DMA_PAD_SZ);
2996 sg_dma_len(psg) = ATA_DMA_PAD_SZ;
2998 sg->length -= qc->pad_len;
2999 if (sg->length == 0)
3002 DPRINTK("padding done, sg->length=%u pad_len=%u\n",
3003 sg->length, qc->pad_len);
3011 dma_address = dma_map_single(ap->dev, qc->buf_virt,
3013 if (dma_mapping_error(dma_address)) {
3015 sg->length += qc->pad_len;
3019 sg_dma_address(sg) = dma_address;
3020 sg_dma_len(sg) = sg->length;
3023 DPRINTK("mapped buffer of %d bytes for %s\n", sg_dma_len(sg),
3024 qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read");
3030 * ata_sg_setup - DMA-map the scatter-gather table associated with a command.
3031 * @qc: Command with scatter-gather table to be mapped.
3033 * DMA-map the scatter-gather table associated with queued_cmd @qc.
3036 * spin_lock_irqsave(host_set lock)
3039 * Zero on success, negative on error.
3043 static int ata_sg_setup(struct ata_queued_cmd *qc)
3045 struct ata_port *ap = qc->ap;
3046 struct scatterlist *sg = qc->__sg;
3047 struct scatterlist *lsg = &sg[qc->n_elem - 1];
3048 int n_elem, pre_n_elem, dir, trim_sg = 0;
3050 VPRINTK("ENTER, ata%u\n", ap->id);
3051 WARN_ON(!(qc->flags & ATA_QCFLAG_SG));
3053 /* we must lengthen transfers to end on a 32-bit boundary */
3054 qc->pad_len = lsg->length & 3;
3056 void *pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ);
3057 struct scatterlist *psg = &qc->pad_sgent;
3058 unsigned int offset;
3060 WARN_ON(qc->dev->class != ATA_DEV_ATAPI);
3062 memset(pad_buf, 0, ATA_DMA_PAD_SZ);
3065 * psg->page/offset are used to copy to-be-written
3066 * data in this function or read data in ata_sg_clean.
3068 offset = lsg->offset + lsg->length - qc->pad_len;
3069 psg->page = nth_page(lsg->page, offset >> PAGE_SHIFT);
3070 psg->offset = offset_in_page(offset);
3072 if (qc->tf.flags & ATA_TFLAG_WRITE) {
3073 void *addr = kmap_atomic(psg->page, KM_IRQ0);
3074 memcpy(pad_buf, addr + psg->offset, qc->pad_len);
3075 kunmap_atomic(addr, KM_IRQ0);
3078 sg_dma_address(psg) = ap->pad_dma + (qc->tag * ATA_DMA_PAD_SZ);
3079 sg_dma_len(psg) = ATA_DMA_PAD_SZ;
3081 lsg->length -= qc->pad_len;
3082 if (lsg->length == 0)
3085 DPRINTK("padding done, sg[%d].length=%u pad_len=%u\n",
3086 qc->n_elem - 1, lsg->length, qc->pad_len);
3089 pre_n_elem = qc->n_elem;
3090 if (trim_sg && pre_n_elem)
3099 n_elem = dma_map_sg(ap->dev, sg, pre_n_elem, dir);
3101 /* restore last sg */
3102 lsg->length += qc->pad_len;
3106 DPRINTK("%d sg elements mapped\n", n_elem);
3109 qc->n_elem = n_elem;
3115 * ata_poll_qc_complete - turn irq back on and finish qc
3116 * @qc: Command to complete
3117 * @err_mask: ATA status register content
3120 * None. (grabs host lock)
3123 void ata_poll_qc_complete(struct ata_queued_cmd *qc)
3125 struct ata_port *ap = qc->ap;
3126 unsigned long flags;
3128 spin_lock_irqsave(&ap->host_set->lock, flags);
3130 ata_qc_complete(qc);
3131 spin_unlock_irqrestore(&ap->host_set->lock, flags);
3135 * ata_pio_poll - poll using PIO, depending on current state
3136 * @ap: the target ata_port
3139 * None. (executing in kernel thread context)
3142 * timeout value to use
3145 static unsigned long ata_pio_poll(struct ata_port *ap)
3147 struct ata_queued_cmd *qc;
3149 unsigned int poll_state = HSM_ST_UNKNOWN;
3150 unsigned int reg_state = HSM_ST_UNKNOWN;
3152 qc = ata_qc_from_tag(ap, ap->active_tag);
3153 WARN_ON(qc == NULL);
3155 switch (ap->hsm_task_state) {
3158 poll_state = HSM_ST_POLL;
3162 case HSM_ST_LAST_POLL:
3163 poll_state = HSM_ST_LAST_POLL;
3164 reg_state = HSM_ST_LAST;
3171 status = ata_chk_status(ap);
3172 if (status & ATA_BUSY) {
3173 if (time_after(jiffies, ap->pio_task_timeout)) {
3174 qc->err_mask |= AC_ERR_TIMEOUT;
3175 ap->hsm_task_state = HSM_ST_TMOUT;
3178 ap->hsm_task_state = poll_state;
3179 return ATA_SHORT_PAUSE;
3182 ap->hsm_task_state = reg_state;
3187 * ata_pio_complete - check if drive is busy or idle
3188 * @ap: the target ata_port
3191 * None. (executing in kernel thread context)
3194 * Zero if qc completed.
3195 * Non-zero if has next.
3198 static int ata_pio_complete (struct ata_port *ap)
3200 struct ata_queued_cmd *qc;
3204 * This is purely heuristic. This is a fast path. Sometimes when
3205 * we enter, BSY will be cleared in a chk-status or two. If not,
3206 * the drive is probably seeking or something. Snooze for a couple
3207 * msecs, then chk-status again. If still busy, fall back to
3208 * HSM_ST_LAST_POLL state.
3210 drv_stat = ata_busy_wait(ap, ATA_BUSY, 10);
3211 if (drv_stat & ATA_BUSY) {
3213 drv_stat = ata_busy_wait(ap, ATA_BUSY, 10);
3214 if (drv_stat & ATA_BUSY) {
3215 ap->hsm_task_state = HSM_ST_LAST_POLL;
3216 ap->pio_task_timeout = jiffies + ATA_TMOUT_PIO;
3221 qc = ata_qc_from_tag(ap, ap->active_tag);
3222 WARN_ON(qc == NULL);
3224 drv_stat = ata_wait_idle(ap);
3225 if (!ata_ok(drv_stat)) {
3226 qc->err_mask |= __ac_err_mask(drv_stat);
3227 ap->hsm_task_state = HSM_ST_ERR;
3231 ap->hsm_task_state = HSM_ST_IDLE;
3233 WARN_ON(qc->err_mask);
3234 ata_poll_qc_complete(qc);
3236 /* another command may start at this point */
3243 * swap_buf_le16 - swap halves of 16-bit words in place
3244 * @buf: Buffer to swap
3245 * @buf_words: Number of 16-bit words in buffer.
3247 * Swap halves of 16-bit words if needed to convert from
3248 * little-endian byte order to native cpu byte order, or
3252 * Inherited from caller.
3254 void swap_buf_le16(u16 *buf, unsigned int buf_words)
3259 for (i = 0; i < buf_words; i++)
3260 buf[i] = le16_to_cpu(buf[i]);
3261 #endif /* __BIG_ENDIAN */
3265 * ata_mmio_data_xfer - Transfer data by MMIO
3266 * @ap: port to read/write
3268 * @buflen: buffer length
3269 * @write_data: read/write
3271 * Transfer data from/to the device data register by MMIO.
3274 * Inherited from caller.
3277 static void ata_mmio_data_xfer(struct ata_port *ap, unsigned char *buf,
3278 unsigned int buflen, int write_data)
3281 unsigned int words = buflen >> 1;
3282 u16 *buf16 = (u16 *) buf;
3283 void __iomem *mmio = (void __iomem *)ap->ioaddr.data_addr;
3285 /* Transfer multiple of 2 bytes */
3287 for (i = 0; i < words; i++)
3288 writew(le16_to_cpu(buf16[i]), mmio);
3290 for (i = 0; i < words; i++)
3291 buf16[i] = cpu_to_le16(readw(mmio));
3294 /* Transfer trailing 1 byte, if any. */
3295 if (unlikely(buflen & 0x01)) {
3296 u16 align_buf[1] = { 0 };
3297 unsigned char *trailing_buf = buf + buflen - 1;
3300 memcpy(align_buf, trailing_buf, 1);
3301 writew(le16_to_cpu(align_buf[0]), mmio);
3303 align_buf[0] = cpu_to_le16(readw(mmio));
3304 memcpy(trailing_buf, align_buf, 1);
3310 * ata_pio_data_xfer - Transfer data by PIO
3311 * @ap: port to read/write
3313 * @buflen: buffer length
3314 * @write_data: read/write
3316 * Transfer data from/to the device data register by PIO.
3319 * Inherited from caller.
3322 static void ata_pio_data_xfer(struct ata_port *ap, unsigned char *buf,
3323 unsigned int buflen, int write_data)
3325 unsigned int words = buflen >> 1;
3327 /* Transfer multiple of 2 bytes */
3329 outsw(ap->ioaddr.data_addr, buf, words);
3331 insw(ap->ioaddr.data_addr, buf, words);
3333 /* Transfer trailing 1 byte, if any. */
3334 if (unlikely(buflen & 0x01)) {
3335 u16 align_buf[1] = { 0 };
3336 unsigned char *trailing_buf = buf + buflen - 1;
3339 memcpy(align_buf, trailing_buf, 1);
3340 outw(le16_to_cpu(align_buf[0]), ap->ioaddr.data_addr);
3342 align_buf[0] = cpu_to_le16(inw(ap->ioaddr.data_addr));
3343 memcpy(trailing_buf, align_buf, 1);
3349 * ata_data_xfer - Transfer data from/to the data register.
3350 * @ap: port to read/write
3352 * @buflen: buffer length
3353 * @do_write: read/write
3355 * Transfer data from/to the device data register.
3358 * Inherited from caller.
3361 static void ata_data_xfer(struct ata_port *ap, unsigned char *buf,
3362 unsigned int buflen, int do_write)
3364 /* Make the crap hardware pay the costs not the good stuff */
3365 if (unlikely(ap->flags & ATA_FLAG_IRQ_MASK)) {
3366 unsigned long flags;
3367 local_irq_save(flags);
3368 if (ap->flags & ATA_FLAG_MMIO)
3369 ata_mmio_data_xfer(ap, buf, buflen, do_write);
3371 ata_pio_data_xfer(ap, buf, buflen, do_write);
3372 local_irq_restore(flags);
3374 if (ap->flags & ATA_FLAG_MMIO)
3375 ata_mmio_data_xfer(ap, buf, buflen, do_write);
3377 ata_pio_data_xfer(ap, buf, buflen, do_write);
3382 * ata_pio_sector - Transfer ATA_SECT_SIZE (512 bytes) of data.
3383 * @qc: Command on going
3385 * Transfer ATA_SECT_SIZE of data from/to the ATA device.
3388 * Inherited from caller.
3391 static void ata_pio_sector(struct ata_queued_cmd *qc)
3393 int do_write = (qc->tf.flags & ATA_TFLAG_WRITE);
3394 struct scatterlist *sg = qc->__sg;
3395 struct ata_port *ap = qc->ap;
3397 unsigned int offset;
3400 if (qc->cursect == (qc->nsect - 1))
3401 ap->hsm_task_state = HSM_ST_LAST;
3403 page = sg[qc->cursg].page;
3404 offset = sg[qc->cursg].offset + qc->cursg_ofs * ATA_SECT_SIZE;
3406 /* get the current page and offset */
3407 page = nth_page(page, (offset >> PAGE_SHIFT));
3408 offset %= PAGE_SIZE;
3410 DPRINTK("data %s\n", qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read");
3412 if (PageHighMem(page)) {
3413 unsigned long flags;
3415 local_irq_save(flags);
3416 buf = kmap_atomic(page, KM_IRQ0);
3418 /* do the actual data transfer */
3419 ata_data_xfer(ap, buf + offset, ATA_SECT_SIZE, do_write);
3421 kunmap_atomic(buf, KM_IRQ0);
3422 local_irq_restore(flags);
3424 buf = page_address(page);
3425 ata_data_xfer(ap, buf + offset, ATA_SECT_SIZE, do_write);
3431 if ((qc->cursg_ofs * ATA_SECT_SIZE) == (&sg[qc->cursg])->length) {
3438 * ata_pio_sectors - Transfer one or many 512-byte sectors.
3439 * @qc: Command on going
3441 * Transfer one or many ATA_SECT_SIZE of data from/to the
3442 * ATA device for the DRQ request.
3445 * Inherited from caller.
3448 static void ata_pio_sectors(struct ata_queued_cmd *qc)
3450 if (is_multi_taskfile(&qc->tf)) {
3451 /* READ/WRITE MULTIPLE */
3454 WARN_ON(qc->dev->multi_count == 0);
3456 nsect = min(qc->nsect - qc->cursect, qc->dev->multi_count);
3464 * atapi_send_cdb - Write CDB bytes to hardware
3465 * @ap: Port to which ATAPI device is attached.
3466 * @qc: Taskfile currently active
3468 * When device has indicated its readiness to accept
3469 * a CDB, this function is called. Send the CDB.
3475 static void atapi_send_cdb(struct ata_port *ap, struct ata_queued_cmd *qc)
3478 DPRINTK("send cdb\n");
3479 WARN_ON(qc->dev->cdb_len < 12);
3481 ata_data_xfer(ap, qc->cdb, qc->dev->cdb_len, 1);
3482 ata_altstatus(ap); /* flush */
3484 switch (qc->tf.protocol) {
3485 case ATA_PROT_ATAPI:
3486 ap->hsm_task_state = HSM_ST;
3488 case ATA_PROT_ATAPI_NODATA:
3489 ap->hsm_task_state = HSM_ST_LAST;
3491 case ATA_PROT_ATAPI_DMA:
3492 ap->hsm_task_state = HSM_ST_LAST;
3493 /* initiate bmdma */
3494 ap->ops->bmdma_start(qc);
3500 * ata_pio_first_block - Write first data block to hardware
3501 * @ap: Port to which ATA/ATAPI device is attached.
3503 * When device has indicated its readiness to accept
3504 * the data, this function sends out the CDB or
3505 * the first data block by PIO.
3507 * - If polling, ata_pio_task() handles the rest.
3508 * - Otherwise, interrupt handler takes over.
3511 * Kernel thread context (may sleep)
3514 * Zero if irq handler takes over
3515 * Non-zero if has next (polling).
3518 static int ata_pio_first_block(struct ata_port *ap)
3520 struct ata_queued_cmd *qc;
3522 unsigned long flags;
3525 qc = ata_qc_from_tag(ap, ap->active_tag);
3526 WARN_ON(qc == NULL);
3527 WARN_ON((qc->flags & ATA_QCFLAG_ACTIVE) == 0);
3529 /* if polling, we will stay in the work queue after sending the data.
3530 * otherwise, interrupt handler takes over after sending the data.
3532 has_next = (qc->tf.flags & ATA_TFLAG_POLLING);
3534 /* sleep-wait for BSY to clear */
3535 DPRINTK("busy wait\n");
3536 if (ata_busy_sleep(ap, ATA_TMOUT_DATAOUT_QUICK, ATA_TMOUT_DATAOUT)) {
3537 qc->err_mask |= AC_ERR_TIMEOUT;
3538 ap->hsm_task_state = HSM_ST_TMOUT;
3542 /* make sure DRQ is set */
3543 status = ata_chk_status(ap);
3544 if ((status & (ATA_BUSY | ATA_DRQ)) != ATA_DRQ) {
3545 /* device status error */
3546 qc->err_mask |= AC_ERR_HSM;
3547 ap->hsm_task_state = HSM_ST_ERR;
3551 /* Send the CDB (atapi) or the first data block (ata pio out).
3552 * During the state transition, interrupt handler shouldn't
3553 * be invoked before the data transfer is complete and
3554 * hsm_task_state is changed. Hence, the following locking.
3556 spin_lock_irqsave(&ap->host_set->lock, flags);
3558 if (qc->tf.protocol == ATA_PROT_PIO) {
3559 /* PIO data out protocol.
3560 * send first data block.
3563 /* ata_pio_sectors() might change the state to HSM_ST_LAST.
3564 * so, the state is changed here before ata_pio_sectors().
3566 ap->hsm_task_state = HSM_ST;
3567 ata_pio_sectors(qc);
3568 ata_altstatus(ap); /* flush */
3571 atapi_send_cdb(ap, qc);
3573 spin_unlock_irqrestore(&ap->host_set->lock, flags);
3575 /* if polling, ata_pio_task() handles the rest.
3576 * otherwise, interrupt handler takes over from here.
3581 return 1; /* has next */
3585 * __atapi_pio_bytes - Transfer data from/to the ATAPI device.
3586 * @qc: Command on going
3587 * @bytes: number of bytes
3589 * Transfer Transfer data from/to the ATAPI device.
3592 * Inherited from caller.
3596 static void __atapi_pio_bytes(struct ata_queued_cmd *qc, unsigned int bytes)
3598 int do_write = (qc->tf.flags & ATA_TFLAG_WRITE);
3599 struct scatterlist *sg = qc->__sg;
3600 struct ata_port *ap = qc->ap;
3603 unsigned int offset, count;
3605 if (qc->curbytes + bytes >= qc->nbytes)
3606 ap->hsm_task_state = HSM_ST_LAST;
3609 if (unlikely(qc->cursg >= qc->n_elem)) {
3611 * The end of qc->sg is reached and the device expects
3612 * more data to transfer. In order not to overrun qc->sg
3613 * and fulfill length specified in the byte count register,
3614 * - for read case, discard trailing data from the device
3615 * - for write case, padding zero data to the device
3617 u16 pad_buf[1] = { 0 };
3618 unsigned int words = bytes >> 1;
3621 if (words) /* warning if bytes > 1 */
3622 printk(KERN_WARNING "ata%u: %u bytes trailing data\n",
3625 for (i = 0; i < words; i++)
3626 ata_data_xfer(ap, (unsigned char*)pad_buf, 2, do_write);
3628 ap->hsm_task_state = HSM_ST_LAST;
3632 sg = &qc->__sg[qc->cursg];
3635 offset = sg->offset + qc->cursg_ofs;
3637 /* get the current page and offset */
3638 page = nth_page(page, (offset >> PAGE_SHIFT));
3639 offset %= PAGE_SIZE;
3641 /* don't overrun current sg */
3642 count = min(sg->length - qc->cursg_ofs, bytes);
3644 /* don't cross page boundaries */
3645 count = min(count, (unsigned int)PAGE_SIZE - offset);
3647 DPRINTK("data %s\n", qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read");
3649 if (PageHighMem(page)) {
3650 unsigned long flags;
3652 local_irq_save(flags);
3653 buf = kmap_atomic(page, KM_IRQ0);
3655 /* do the actual data transfer */
3656 ata_data_xfer(ap, buf + offset, count, do_write);
3658 kunmap_atomic(buf, KM_IRQ0);
3659 local_irq_restore(flags);
3661 buf = page_address(page);
3662 ata_data_xfer(ap, buf + offset, count, do_write);
3666 qc->curbytes += count;
3667 qc->cursg_ofs += count;
3669 if (qc->cursg_ofs == sg->length) {
3679 * atapi_pio_bytes - Transfer data from/to the ATAPI device.
3680 * @qc: Command on going
3682 * Transfer Transfer data from/to the ATAPI device.
3685 * Inherited from caller.
3688 static void atapi_pio_bytes(struct ata_queued_cmd *qc)
3690 struct ata_port *ap = qc->ap;
3691 struct ata_device *dev = qc->dev;
3692 unsigned int ireason, bc_lo, bc_hi, bytes;
3693 int i_write, do_write = (qc->tf.flags & ATA_TFLAG_WRITE) ? 1 : 0;
3695 ap->ops->tf_read(ap, &qc->tf);
3696 ireason = qc->tf.nsect;
3697 bc_lo = qc->tf.lbam;
3698 bc_hi = qc->tf.lbah;
3699 bytes = (bc_hi << 8) | bc_lo;
3701 /* shall be cleared to zero, indicating xfer of data */
3702 if (ireason & (1 << 0))
3705 /* make sure transfer direction matches expected */
3706 i_write = ((ireason & (1 << 1)) == 0) ? 1 : 0;
3707 if (do_write != i_write)
3710 VPRINTK("ata%u: xfering %d bytes\n", ap->id, bytes);
3712 __atapi_pio_bytes(qc, bytes);
3717 printk(KERN_INFO "ata%u: dev %u: ATAPI check failed\n",
3718 ap->id, dev->devno);
3719 qc->err_mask |= AC_ERR_HSM;
3720 ap->hsm_task_state = HSM_ST_ERR;
3724 * ata_pio_block - start PIO on a block
3725 * @ap: the target ata_port
3728 * None. (executing in kernel thread context)
3731 static void ata_pio_block(struct ata_port *ap)
3733 struct ata_queued_cmd *qc;
3737 * This is purely heuristic. This is a fast path.
3738 * Sometimes when we enter, BSY will be cleared in
3739 * a chk-status or two. If not, the drive is probably seeking
3740 * or something. Snooze for a couple msecs, then
3741 * chk-status again. If still busy, fall back to
3742 * HSM_ST_POLL state.
3744 status = ata_busy_wait(ap, ATA_BUSY, 5);
3745 if (status & ATA_BUSY) {
3747 status = ata_busy_wait(ap, ATA_BUSY, 10);
3748 if (status & ATA_BUSY) {
3749 ap->hsm_task_state = HSM_ST_POLL;
3750 ap->pio_task_timeout = jiffies + ATA_TMOUT_PIO;
3755 qc = ata_qc_from_tag(ap, ap->active_tag);
3756 WARN_ON(qc == NULL);
3759 if (status & (ATA_ERR | ATA_DF)) {
3760 qc->err_mask |= AC_ERR_DEV;
3761 ap->hsm_task_state = HSM_ST_ERR;
3765 /* transfer data if any */
3766 if (is_atapi_taskfile(&qc->tf)) {
3767 /* DRQ=0 means no more data to transfer */
3768 if ((status & ATA_DRQ) == 0) {
3769 ap->hsm_task_state = HSM_ST_LAST;
3773 atapi_pio_bytes(qc);
3775 /* handle BSY=0, DRQ=0 as error */
3776 if ((status & ATA_DRQ) == 0) {
3777 qc->err_mask |= AC_ERR_HSM;
3778 ap->hsm_task_state = HSM_ST_ERR;
3782 ata_pio_sectors(qc);
3785 ata_altstatus(ap); /* flush */
3788 static void ata_pio_error(struct ata_port *ap)
3790 struct ata_queued_cmd *qc;
3792 qc = ata_qc_from_tag(ap, ap->active_tag);
3793 WARN_ON(qc == NULL);
3795 if (qc->tf.command != ATA_CMD_PACKET)
3796 printk(KERN_WARNING "ata%u: PIO error\n", ap->id);
3798 /* make sure qc->err_mask is available to
3799 * know what's wrong and recover
3801 WARN_ON(qc->err_mask == 0);
3803 ap->hsm_task_state = HSM_ST_IDLE;
3805 ata_poll_qc_complete(qc);
3808 static void ata_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc,
3811 WARN_ON((qc->flags & ATA_QCFLAG_ACTIVE) == 0);
3814 if (unlikely(status & (ATA_ERR | ATA_DF))) {
3815 qc->err_mask |= AC_ERR_DEV;
3816 ap->hsm_task_state = HSM_ST_ERR;
3820 switch (ap->hsm_task_state) {
3822 /* check device status */
3823 if (unlikely((status & (ATA_BUSY | ATA_DRQ)) != ATA_DRQ)) {
3824 /* Wrong status. Let EH handle this */
3825 qc->err_mask |= AC_ERR_HSM;
3826 ap->hsm_task_state = HSM_ST_ERR;
3830 atapi_send_cdb(ap, qc);
3835 /* complete command or read/write the data register */
3836 if (qc->tf.protocol == ATA_PROT_ATAPI) {
3837 /* ATAPI PIO protocol */
3838 if ((status & ATA_DRQ) == 0) {
3839 /* no more data to transfer */
3840 ap->hsm_task_state = HSM_ST_LAST;
3844 atapi_pio_bytes(qc);
3846 if (unlikely(ap->hsm_task_state == HSM_ST_ERR))
3847 /* bad ireason reported by device */
3851 /* ATA PIO protocol */
3852 if (unlikely((status & ATA_DRQ) == 0)) {
3853 /* handle BSY=0, DRQ=0 as error */
3854 qc->err_mask |= AC_ERR_HSM;
3855 ap->hsm_task_state = HSM_ST_ERR;
3859 ata_pio_sectors(qc);
3861 if (ap->hsm_task_state == HSM_ST_LAST &&
3862 (!(qc->tf.flags & ATA_TFLAG_WRITE))) {
3865 status = ata_chk_status(ap);
3870 ata_altstatus(ap); /* flush */
3874 if (unlikely(!ata_ok(status))) {
3875 qc->err_mask |= __ac_err_mask(status);
3876 ap->hsm_task_state = HSM_ST_ERR;
3880 /* no more data to transfer */
3881 DPRINTK("ata%u: command complete, drv_stat 0x%x\n",
3884 WARN_ON(qc->err_mask);
3886 ap->hsm_task_state = HSM_ST_IDLE;
3888 /* complete taskfile transaction */
3889 ata_qc_complete(qc);
3893 if (qc->tf.command != ATA_CMD_PACKET)
3894 printk(KERN_ERR "ata%u: command error, drv_stat 0x%x\n",
3897 /* make sure qc->err_mask is available to
3898 * know what's wrong and recover
3900 WARN_ON(qc->err_mask == 0);
3902 ap->hsm_task_state = HSM_ST_IDLE;
3903 ata_qc_complete(qc);
3911 static void ata_pio_task(void *_data)
3913 struct ata_port *ap = _data;
3914 unsigned long timeout;
3921 switch (ap->hsm_task_state) {
3923 has_next = ata_pio_first_block(ap);
3931 has_next = ata_pio_complete(ap);
3935 case HSM_ST_LAST_POLL:
3936 timeout = ata_pio_poll(ap);
3950 ata_port_queue_task(ap, ata_pio_task, ap, timeout);
3956 * ata_qc_timeout - Handle timeout of queued command
3957 * @qc: Command that timed out
3959 * Some part of the kernel (currently, only the SCSI layer)
3960 * has noticed that the active command on port @ap has not
3961 * completed after a specified length of time. Handle this
3962 * condition by disabling DMA (if necessary) and completing
3963 * transactions, with error if necessary.
3965 * This also handles the case of the "lost interrupt", where
3966 * for some reason (possibly hardware bug, possibly driver bug)
3967 * an interrupt was not delivered to the driver, even though the
3968 * transaction completed successfully.
3971 * Inherited from SCSI layer (none, can sleep)
3974 static void ata_qc_timeout(struct ata_queued_cmd *qc)
3976 struct ata_port *ap = qc->ap;
3977 struct ata_host_set *host_set = ap->host_set;
3978 u8 host_stat = 0, drv_stat;
3979 unsigned long flags;
3983 ap->hsm_task_state = HSM_ST_IDLE;
3985 spin_lock_irqsave(&host_set->lock, flags);
3987 switch (qc->tf.protocol) {
3990 case ATA_PROT_ATAPI_DMA:
3991 host_stat = ap->ops->bmdma_status(ap);
3993 /* before we do anything else, clear DMA-Start bit */
3994 ap->ops->bmdma_stop(qc);
4000 drv_stat = ata_chk_status(ap);
4002 /* ack bmdma irq events */
4003 ap->ops->irq_clear(ap);
4005 printk(KERN_ERR "ata%u: command 0x%x timeout, stat 0x%x host_stat 0x%x\n",
4006 ap->id, qc->tf.command, drv_stat, host_stat);
4008 ap->hsm_task_state = HSM_ST_IDLE;
4010 /* complete taskfile transaction */
4011 qc->err_mask |= AC_ERR_TIMEOUT;
4015 spin_unlock_irqrestore(&host_set->lock, flags);
4017 ata_eh_qc_complete(qc);
4023 * ata_eng_timeout - Handle timeout of queued command
4024 * @ap: Port on which timed-out command is active
4026 * Some part of the kernel (currently, only the SCSI layer)
4027 * has noticed that the active command on port @ap has not
4028 * completed after a specified length of time. Handle this
4029 * condition by disabling DMA (if necessary) and completing
4030 * transactions, with error if necessary.
4032 * This also handles the case of the "lost interrupt", where
4033 * for some reason (possibly hardware bug, possibly driver bug)
4034 * an interrupt was not delivered to the driver, even though the
4035 * transaction completed successfully.
4038 * Inherited from SCSI layer (none, can sleep)
4041 void ata_eng_timeout(struct ata_port *ap)
4045 ata_qc_timeout(ata_qc_from_tag(ap, ap->active_tag));
4051 * ata_qc_new - Request an available ATA command, for queueing
4052 * @ap: Port associated with device @dev
4053 * @dev: Device from whom we request an available command structure
4059 static struct ata_queued_cmd *ata_qc_new(struct ata_port *ap)
4061 struct ata_queued_cmd *qc = NULL;
4064 for (i = 0; i < ATA_MAX_QUEUE; i++)
4065 if (!test_and_set_bit(i, &ap->qactive)) {
4066 qc = ata_qc_from_tag(ap, i);
4077 * ata_qc_new_init - Request an available ATA command, and initialize it
4078 * @ap: Port associated with device @dev
4079 * @dev: Device from whom we request an available command structure
4085 struct ata_queued_cmd *ata_qc_new_init(struct ata_port *ap,
4086 struct ata_device *dev)
4088 struct ata_queued_cmd *qc;
4090 qc = ata_qc_new(ap);
4103 * ata_qc_free - free unused ata_queued_cmd
4104 * @qc: Command to complete
4106 * Designed to free unused ata_queued_cmd object
4107 * in case something prevents using it.
4110 * spin_lock_irqsave(host_set lock)
4112 void ata_qc_free(struct ata_queued_cmd *qc)
4114 struct ata_port *ap = qc->ap;
4117 WARN_ON(qc == NULL); /* ata_qc_from_tag _might_ return NULL */
4121 if (likely(ata_tag_valid(tag))) {
4122 if (tag == ap->active_tag)
4123 ap->active_tag = ATA_TAG_POISON;
4124 qc->tag = ATA_TAG_POISON;
4125 clear_bit(tag, &ap->qactive);
4129 void __ata_qc_complete(struct ata_queued_cmd *qc)
4131 WARN_ON(qc == NULL); /* ata_qc_from_tag _might_ return NULL */
4132 WARN_ON(!(qc->flags & ATA_QCFLAG_ACTIVE));
4134 if (likely(qc->flags & ATA_QCFLAG_DMAMAP))
4137 /* atapi: mark qc as inactive to prevent the interrupt handler
4138 * from completing the command twice later, before the error handler
4139 * is called. (when rc != 0 and atapi request sense is needed)
4141 qc->flags &= ~ATA_QCFLAG_ACTIVE;
4143 /* call completion callback */
4144 qc->complete_fn(qc);
4147 static inline int ata_should_dma_map(struct ata_queued_cmd *qc)
4149 struct ata_port *ap = qc->ap;
4151 switch (qc->tf.protocol) {
4153 case ATA_PROT_ATAPI_DMA:
4156 case ATA_PROT_ATAPI:
4158 if (ap->flags & ATA_FLAG_PIO_DMA)
4171 * ata_qc_issue - issue taskfile to device
4172 * @qc: command to issue to device
4174 * Prepare an ATA command to submission to device.
4175 * This includes mapping the data into a DMA-able
4176 * area, filling in the S/G table, and finally
4177 * writing the taskfile to hardware, starting the command.
4180 * spin_lock_irqsave(host_set lock)
4183 * Zero on success, AC_ERR_* mask on failure
4186 unsigned int ata_qc_issue(struct ata_queued_cmd *qc)
4188 struct ata_port *ap = qc->ap;
4190 if (ata_should_dma_map(qc)) {
4191 if (qc->flags & ATA_QCFLAG_SG) {
4192 if (ata_sg_setup(qc))
4194 } else if (qc->flags & ATA_QCFLAG_SINGLE) {
4195 if (ata_sg_setup_one(qc))
4199 qc->flags &= ~ATA_QCFLAG_DMAMAP;
4202 ap->ops->qc_prep(qc);
4204 qc->ap->active_tag = qc->tag;
4205 qc->flags |= ATA_QCFLAG_ACTIVE;
4207 return ap->ops->qc_issue(qc);
4210 qc->flags &= ~ATA_QCFLAG_DMAMAP;
4211 return AC_ERR_SYSTEM;
4216 * ata_qc_issue_prot - issue taskfile to device in proto-dependent manner
4217 * @qc: command to issue to device
4219 * Using various libata functions and hooks, this function
4220 * starts an ATA command. ATA commands are grouped into
4221 * classes called "protocols", and issuing each type of protocol
4222 * is slightly different.
4224 * May be used as the qc_issue() entry in ata_port_operations.
4227 * spin_lock_irqsave(host_set lock)
4230 * Zero on success, AC_ERR_* mask on failure
4233 unsigned int ata_qc_issue_prot(struct ata_queued_cmd *qc)
4235 struct ata_port *ap = qc->ap;
4237 /* Use polling pio if the LLD doesn't handle
4238 * interrupt driven pio and atapi CDB interrupt.
4240 if (ap->flags & ATA_FLAG_PIO_POLLING) {
4241 switch (qc->tf.protocol) {
4243 case ATA_PROT_ATAPI:
4244 case ATA_PROT_ATAPI_NODATA:
4245 qc->tf.flags |= ATA_TFLAG_POLLING;
4247 case ATA_PROT_ATAPI_DMA:
4248 if (qc->dev->flags & ATA_DFLAG_CDB_INTR)
4256 /* select the device */
4257 ata_dev_select(ap, qc->dev->devno, 1, 0);
4259 /* start the command */
4260 switch (qc->tf.protocol) {
4261 case ATA_PROT_NODATA:
4262 if (qc->tf.flags & ATA_TFLAG_POLLING)
4263 ata_qc_set_polling(qc);
4265 ata_tf_to_host(ap, &qc->tf);
4266 ap->hsm_task_state = HSM_ST_LAST;
4268 if (qc->tf.flags & ATA_TFLAG_POLLING)
4269 ata_port_queue_task(ap, ata_pio_task, ap, 0);
4274 WARN_ON(qc->tf.flags & ATA_TFLAG_POLLING);
4276 ap->ops->tf_load(ap, &qc->tf); /* load tf registers */
4277 ap->ops->bmdma_setup(qc); /* set up bmdma */
4278 ap->ops->bmdma_start(qc); /* initiate bmdma */
4279 ap->hsm_task_state = HSM_ST_LAST;
4283 if (qc->tf.flags & ATA_TFLAG_POLLING)
4284 ata_qc_set_polling(qc);
4286 ata_tf_to_host(ap, &qc->tf);
4288 if (qc->tf.flags & ATA_TFLAG_WRITE) {
4289 /* PIO data out protocol */
4290 ap->hsm_task_state = HSM_ST_FIRST;
4291 ata_port_queue_task(ap, ata_pio_task, ap, 0);
4293 /* always send first data block using
4294 * the ata_pio_task() codepath.
4297 /* PIO data in protocol */
4298 ap->hsm_task_state = HSM_ST;
4300 if (qc->tf.flags & ATA_TFLAG_POLLING)
4301 ata_port_queue_task(ap, ata_pio_task, ap, 0);
4303 /* if polling, ata_pio_task() handles the rest.
4304 * otherwise, interrupt handler takes over from here.
4310 case ATA_PROT_ATAPI:
4311 case ATA_PROT_ATAPI_NODATA:
4312 if (qc->tf.flags & ATA_TFLAG_POLLING)
4313 ata_qc_set_polling(qc);
4315 ata_tf_to_host(ap, &qc->tf);
4317 ap->hsm_task_state = HSM_ST_FIRST;
4319 /* send cdb by polling if no cdb interrupt */
4320 if ((!(qc->dev->flags & ATA_DFLAG_CDB_INTR)) ||
4321 (qc->tf.flags & ATA_TFLAG_POLLING))
4322 ata_port_queue_task(ap, ata_pio_task, ap, 0);
4325 case ATA_PROT_ATAPI_DMA:
4326 WARN_ON(qc->tf.flags & ATA_TFLAG_POLLING);
4328 ap->ops->tf_load(ap, &qc->tf); /* load tf registers */
4329 ap->ops->bmdma_setup(qc); /* set up bmdma */
4330 ap->hsm_task_state = HSM_ST_FIRST;
4332 /* send cdb by polling if no cdb interrupt */
4333 if (!(qc->dev->flags & ATA_DFLAG_CDB_INTR))
4334 ata_port_queue_task(ap, ata_pio_task, ap, 0);
4339 return AC_ERR_SYSTEM;
4346 * ata_host_intr - Handle host interrupt for given (port, task)
4347 * @ap: Port on which interrupt arrived (possibly...)
4348 * @qc: Taskfile currently active in engine
4350 * Handle host interrupt for given queued command. Currently,
4351 * only DMA interrupts are handled. All other commands are
4352 * handled via polling with interrupts disabled (nIEN bit).
4355 * spin_lock_irqsave(host_set lock)
4358 * One if interrupt was handled, zero if not (shared irq).
4361 inline unsigned int ata_host_intr (struct ata_port *ap,
4362 struct ata_queued_cmd *qc)
4364 u8 status, host_stat = 0;
4366 VPRINTK("ata%u: protocol %d task_state %d\n",
4367 ap->id, qc->tf.protocol, ap->hsm_task_state);
4369 /* Check whether we are expecting interrupt in this state */
4370 switch (ap->hsm_task_state) {
4372 /* Some pre-ATAPI-4 devices assert INTRQ
4373 * at this state when ready to receive CDB.
4376 /* Check the ATA_DFLAG_CDB_INTR flag is enough here.
4377 * The flag was turned on only for atapi devices.
4378 * No need to check is_atapi_taskfile(&qc->tf) again.
4380 if (!(qc->dev->flags & ATA_DFLAG_CDB_INTR))
4384 if (qc->tf.protocol == ATA_PROT_DMA ||
4385 qc->tf.protocol == ATA_PROT_ATAPI_DMA) {
4386 /* check status of DMA engine */
4387 host_stat = ap->ops->bmdma_status(ap);
4388 VPRINTK("ata%u: host_stat 0x%X\n", ap->id, host_stat);
4390 /* if it's not our irq... */
4391 if (!(host_stat & ATA_DMA_INTR))
4394 /* before we do anything else, clear DMA-Start bit */
4395 ap->ops->bmdma_stop(qc);
4397 if (unlikely(host_stat & ATA_DMA_ERR)) {
4398 /* error when transfering data to/from memory */
4399 qc->err_mask |= AC_ERR_HOST_BUS;
4400 ap->hsm_task_state = HSM_ST_ERR;
4410 /* check altstatus */
4411 status = ata_altstatus(ap);
4412 if (status & ATA_BUSY)
4415 /* check main status, clearing INTRQ */
4416 status = ata_chk_status(ap);
4417 if (unlikely(status & ATA_BUSY))
4420 DPRINTK("ata%u: protocol %d task_state %d (dev_stat 0x%X)\n",
4421 ap->id, qc->tf.protocol, ap->hsm_task_state, status);
4423 /* ack bmdma irq events */
4424 ap->ops->irq_clear(ap);
4426 ata_hsm_move(ap, qc, status);
4427 return 1; /* irq handled */
4430 ap->stats.idle_irq++;
4433 if ((ap->stats.idle_irq % 1000) == 0) {
4434 ata_irq_ack(ap, 0); /* debug trap */
4435 printk(KERN_WARNING "ata%d: irq trap\n", ap->id);
4439 return 0; /* irq not handled */
4443 * ata_interrupt - Default ATA host interrupt handler
4444 * @irq: irq line (unused)
4445 * @dev_instance: pointer to our ata_host_set information structure
4448 * Default interrupt handler for PCI IDE devices. Calls
4449 * ata_host_intr() for each port that is not disabled.
4452 * Obtains host_set lock during operation.
4455 * IRQ_NONE or IRQ_HANDLED.
4458 irqreturn_t ata_interrupt (int irq, void *dev_instance, struct pt_regs *regs)
4460 struct ata_host_set *host_set = dev_instance;
4462 unsigned int handled = 0;
4463 unsigned long flags;
4465 /* TODO: make _irqsave conditional on x86 PCI IDE legacy mode */
4466 spin_lock_irqsave(&host_set->lock, flags);
4468 for (i = 0; i < host_set->n_ports; i++) {
4469 struct ata_port *ap;
4471 ap = host_set->ports[i];
4473 !(ap->flags & ATA_FLAG_PORT_DISABLED)) {
4474 struct ata_queued_cmd *qc;
4476 qc = ata_qc_from_tag(ap, ap->active_tag);
4477 if (qc && (!(qc->tf.flags & ATA_TFLAG_POLLING)) &&
4478 (qc->flags & ATA_QCFLAG_ACTIVE))
4479 handled |= ata_host_intr(ap, qc);
4483 spin_unlock_irqrestore(&host_set->lock, flags);
4485 return IRQ_RETVAL(handled);
4490 * Execute a 'simple' command, that only consists of the opcode 'cmd' itself,
4491 * without filling any other registers
4493 static int ata_do_simple_cmd(struct ata_port *ap, struct ata_device *dev,
4496 struct ata_taskfile tf;
4499 ata_tf_init(ap, &tf, dev->devno);
4502 tf.flags |= ATA_TFLAG_DEVICE;
4503 tf.protocol = ATA_PROT_NODATA;
4505 err = ata_exec_internal(ap, dev, &tf, DMA_NONE, NULL, 0);
4507 printk(KERN_ERR "%s: ata command failed: %d\n",
4513 static int ata_flush_cache(struct ata_port *ap, struct ata_device *dev)
4517 if (!ata_try_flush_cache(dev))
4520 if (ata_id_has_flush_ext(dev->id))
4521 cmd = ATA_CMD_FLUSH_EXT;
4523 cmd = ATA_CMD_FLUSH;
4525 return ata_do_simple_cmd(ap, dev, cmd);
4528 static int ata_standby_drive(struct ata_port *ap, struct ata_device *dev)
4530 return ata_do_simple_cmd(ap, dev, ATA_CMD_STANDBYNOW1);
4533 static int ata_start_drive(struct ata_port *ap, struct ata_device *dev)
4535 return ata_do_simple_cmd(ap, dev, ATA_CMD_IDLEIMMEDIATE);
4539 * ata_device_resume - wakeup a previously suspended devices
4540 * @ap: port the device is connected to
4541 * @dev: the device to resume
4543 * Kick the drive back into action, by sending it an idle immediate
4544 * command and making sure its transfer mode matches between drive
4548 int ata_device_resume(struct ata_port *ap, struct ata_device *dev)
4550 if (ap->flags & ATA_FLAG_SUSPENDED) {
4551 ap->flags &= ~ATA_FLAG_SUSPENDED;
4554 if (!ata_dev_present(dev))
4556 if (dev->class == ATA_DEV_ATA)
4557 ata_start_drive(ap, dev);
4563 * ata_device_suspend - prepare a device for suspend
4564 * @ap: port the device is connected to
4565 * @dev: the device to suspend
4567 * Flush the cache on the drive, if appropriate, then issue a
4568 * standbynow command.
4570 int ata_device_suspend(struct ata_port *ap, struct ata_device *dev, pm_message_t state)
4572 if (!ata_dev_present(dev))
4574 if (dev->class == ATA_DEV_ATA)
4575 ata_flush_cache(ap, dev);
4577 if (state.event != PM_EVENT_FREEZE)
4578 ata_standby_drive(ap, dev);
4579 ap->flags |= ATA_FLAG_SUSPENDED;
4584 * ata_port_start - Set port up for dma.
4585 * @ap: Port to initialize
4587 * Called just after data structures for each port are
4588 * initialized. Allocates space for PRD table.
4590 * May be used as the port_start() entry in ata_port_operations.
4593 * Inherited from caller.
4596 int ata_port_start (struct ata_port *ap)
4598 struct device *dev = ap->dev;
4601 ap->prd = dma_alloc_coherent(dev, ATA_PRD_TBL_SZ, &ap->prd_dma, GFP_KERNEL);
4605 rc = ata_pad_alloc(ap, dev);
4607 dma_free_coherent(dev, ATA_PRD_TBL_SZ, ap->prd, ap->prd_dma);
4611 DPRINTK("prd alloc, virt %p, dma %llx\n", ap->prd, (unsigned long long) ap->prd_dma);
4618 * ata_port_stop - Undo ata_port_start()
4619 * @ap: Port to shut down
4621 * Frees the PRD table.
4623 * May be used as the port_stop() entry in ata_port_operations.
4626 * Inherited from caller.
4629 void ata_port_stop (struct ata_port *ap)
4631 struct device *dev = ap->dev;
4633 dma_free_coherent(dev, ATA_PRD_TBL_SZ, ap->prd, ap->prd_dma);
4634 ata_pad_free(ap, dev);
4637 void ata_host_stop (struct ata_host_set *host_set)
4639 if (host_set->mmio_base)
4640 iounmap(host_set->mmio_base);
4645 * ata_host_remove - Unregister SCSI host structure with upper layers
4646 * @ap: Port to unregister
4647 * @do_unregister: 1 if we fully unregister, 0 to just stop the port
4650 * Inherited from caller.
4653 static void ata_host_remove(struct ata_port *ap, unsigned int do_unregister)
4655 struct Scsi_Host *sh = ap->host;
4660 scsi_remove_host(sh);
4662 ap->ops->port_stop(ap);
4666 * ata_host_init - Initialize an ata_port structure
4667 * @ap: Structure to initialize
4668 * @host: associated SCSI mid-layer structure
4669 * @host_set: Collection of hosts to which @ap belongs
4670 * @ent: Probe information provided by low-level driver
4671 * @port_no: Port number associated with this ata_port
4673 * Initialize a new ata_port structure, and its associated
4677 * Inherited from caller.
4680 static void ata_host_init(struct ata_port *ap, struct Scsi_Host *host,
4681 struct ata_host_set *host_set,
4682 const struct ata_probe_ent *ent, unsigned int port_no)
4688 host->max_channel = 1;
4689 host->unique_id = ata_unique_id++;
4690 host->max_cmd_len = 12;
4692 ap->flags = ATA_FLAG_PORT_DISABLED;
4693 ap->id = host->unique_id;
4695 ap->ctl = ATA_DEVCTL_OBS;
4696 ap->host_set = host_set;
4698 ap->port_no = port_no;
4700 ent->legacy_mode ? ent->hard_port_no : port_no;
4701 ap->pio_mask = ent->pio_mask;
4702 ap->mwdma_mask = ent->mwdma_mask;
4703 ap->udma_mask = ent->udma_mask;
4704 ap->flags |= ent->host_flags;
4705 ap->ops = ent->port_ops;
4706 ap->cbl = ATA_CBL_NONE;
4707 ap->active_tag = ATA_TAG_POISON;
4708 ap->last_ctl = 0xFF;
4710 INIT_WORK(&ap->port_task, NULL, NULL);
4711 INIT_LIST_HEAD(&ap->eh_done_q);
4713 for (i = 0; i < ATA_MAX_DEVICES; i++) {
4714 struct ata_device *dev = &ap->device[i];
4716 dev->pio_mask = UINT_MAX;
4717 dev->mwdma_mask = UINT_MAX;
4718 dev->udma_mask = UINT_MAX;
4722 ap->stats.unhandled_irq = 1;
4723 ap->stats.idle_irq = 1;
4726 memcpy(&ap->ioaddr, &ent->port[port_no], sizeof(struct ata_ioports));
4730 * ata_host_add - Attach low-level ATA driver to system
4731 * @ent: Information provided by low-level driver
4732 * @host_set: Collections of ports to which we add
4733 * @port_no: Port number associated with this host
4735 * Attach low-level ATA driver to system.
4738 * PCI/etc. bus probe sem.
4741 * New ata_port on success, for NULL on error.
4744 static struct ata_port * ata_host_add(const struct ata_probe_ent *ent,
4745 struct ata_host_set *host_set,
4746 unsigned int port_no)
4748 struct Scsi_Host *host;
4749 struct ata_port *ap;
4754 if (!ent->port_ops->probe_reset &&
4755 !(ent->host_flags & (ATA_FLAG_SATA_RESET | ATA_FLAG_SRST))) {
4756 printk(KERN_ERR "ata%u: no reset mechanism available\n",
4761 host = scsi_host_alloc(ent->sht, sizeof(struct ata_port));
4765 host->transportt = &ata_scsi_transport_template;
4767 ap = (struct ata_port *) &host->hostdata[0];
4769 ata_host_init(ap, host, host_set, ent, port_no);
4771 rc = ap->ops->port_start(ap);
4778 scsi_host_put(host);
4783 * ata_device_add - Register hardware device with ATA and SCSI layers
4784 * @ent: Probe information describing hardware device to be registered
4786 * This function processes the information provided in the probe
4787 * information struct @ent, allocates the necessary ATA and SCSI
4788 * host information structures, initializes them, and registers
4789 * everything with requisite kernel subsystems.
4791 * This function requests irqs, probes the ATA bus, and probes
4795 * PCI/etc. bus probe sem.
4798 * Number of ports registered. Zero on error (no ports registered).
4801 int ata_device_add(const struct ata_probe_ent *ent)
4803 unsigned int count = 0, i;
4804 struct device *dev = ent->dev;
4805 struct ata_host_set *host_set;
4808 /* alloc a container for our list of ATA ports (buses) */
4809 host_set = kzalloc(sizeof(struct ata_host_set) +
4810 (ent->n_ports * sizeof(void *)), GFP_KERNEL);
4813 spin_lock_init(&host_set->lock);
4815 host_set->dev = dev;
4816 host_set->n_ports = ent->n_ports;
4817 host_set->irq = ent->irq;
4818 host_set->mmio_base = ent->mmio_base;
4819 host_set->private_data = ent->private_data;
4820 host_set->ops = ent->port_ops;
4822 /* register each port bound to this device */
4823 for (i = 0; i < ent->n_ports; i++) {
4824 struct ata_port *ap;
4825 unsigned long xfer_mode_mask;
4827 ap = ata_host_add(ent, host_set, i);
4831 host_set->ports[i] = ap;
4832 xfer_mode_mask =(ap->udma_mask << ATA_SHIFT_UDMA) |
4833 (ap->mwdma_mask << ATA_SHIFT_MWDMA) |
4834 (ap->pio_mask << ATA_SHIFT_PIO);
4836 /* print per-port info to dmesg */
4837 printk(KERN_INFO "ata%u: %cATA max %s cmd 0x%lX ctl 0x%lX "
4838 "bmdma 0x%lX irq %lu\n",
4840 ap->flags & ATA_FLAG_SATA ? 'S' : 'P',
4841 ata_mode_string(xfer_mode_mask),
4842 ap->ioaddr.cmd_addr,
4843 ap->ioaddr.ctl_addr,
4844 ap->ioaddr.bmdma_addr,
4848 host_set->ops->irq_clear(ap);
4855 /* obtain irq, that is shared between channels */
4856 if (request_irq(ent->irq, ent->port_ops->irq_handler, ent->irq_flags,
4857 DRV_NAME, host_set))
4860 /* perform each probe synchronously */
4861 DPRINTK("probe begin\n");
4862 for (i = 0; i < count; i++) {
4863 struct ata_port *ap;
4866 ap = host_set->ports[i];
4868 DPRINTK("ata%u: bus probe begin\n", ap->id);
4869 rc = ata_bus_probe(ap);
4870 DPRINTK("ata%u: bus probe end\n", ap->id);
4873 /* FIXME: do something useful here?
4874 * Current libata behavior will
4875 * tear down everything when
4876 * the module is removed
4877 * or the h/w is unplugged.
4881 rc = scsi_add_host(ap->host, dev);
4883 printk(KERN_ERR "ata%u: scsi_add_host failed\n",
4885 /* FIXME: do something useful here */
4886 /* FIXME: handle unconditional calls to
4887 * scsi_scan_host and ata_host_remove, below,
4893 /* probes are done, now scan each port's disk(s) */
4894 DPRINTK("host probe begin\n");
4895 for (i = 0; i < count; i++) {
4896 struct ata_port *ap = host_set->ports[i];
4898 ata_scsi_scan_host(ap);
4901 dev_set_drvdata(dev, host_set);
4903 VPRINTK("EXIT, returning %u\n", ent->n_ports);
4904 return ent->n_ports; /* success */
4907 for (i = 0; i < count; i++) {
4908 ata_host_remove(host_set->ports[i], 1);
4909 scsi_host_put(host_set->ports[i]->host);
4913 VPRINTK("EXIT, returning 0\n");
4918 * ata_host_set_remove - PCI layer callback for device removal
4919 * @host_set: ATA host set that was removed
4921 * Unregister all objects associated with this host set. Free those
4925 * Inherited from calling layer (may sleep).
4928 void ata_host_set_remove(struct ata_host_set *host_set)
4930 struct ata_port *ap;
4933 for (i = 0; i < host_set->n_ports; i++) {
4934 ap = host_set->ports[i];
4935 scsi_remove_host(ap->host);
4938 free_irq(host_set->irq, host_set);
4940 for (i = 0; i < host_set->n_ports; i++) {
4941 ap = host_set->ports[i];
4943 ata_scsi_release(ap->host);
4945 if ((ap->flags & ATA_FLAG_NO_LEGACY) == 0) {
4946 struct ata_ioports *ioaddr = &ap->ioaddr;
4948 if (ioaddr->cmd_addr == 0x1f0)
4949 release_region(0x1f0, 8);
4950 else if (ioaddr->cmd_addr == 0x170)
4951 release_region(0x170, 8);
4954 scsi_host_put(ap->host);
4957 if (host_set->ops->host_stop)
4958 host_set->ops->host_stop(host_set);
4964 * ata_scsi_release - SCSI layer callback hook for host unload
4965 * @host: libata host to be unloaded
4967 * Performs all duties necessary to shut down a libata port...
4968 * Kill port kthread, disable port, and release resources.
4971 * Inherited from SCSI layer.
4977 int ata_scsi_release(struct Scsi_Host *host)
4979 struct ata_port *ap = (struct ata_port *) &host->hostdata[0];
4984 ap->ops->port_disable(ap);
4985 ata_host_remove(ap, 0);
4986 for (i = 0; i < ATA_MAX_DEVICES; i++)
4987 kfree(ap->device[i].id);
4994 * ata_std_ports - initialize ioaddr with standard port offsets.
4995 * @ioaddr: IO address structure to be initialized
4997 * Utility function which initializes data_addr, error_addr,
4998 * feature_addr, nsect_addr, lbal_addr, lbam_addr, lbah_addr,
4999 * device_addr, status_addr, and command_addr to standard offsets
5000 * relative to cmd_addr.
5002 * Does not set ctl_addr, altstatus_addr, bmdma_addr, or scr_addr.
5005 void ata_std_ports(struct ata_ioports *ioaddr)
5007 ioaddr->data_addr = ioaddr->cmd_addr + ATA_REG_DATA;
5008 ioaddr->error_addr = ioaddr->cmd_addr + ATA_REG_ERR;
5009 ioaddr->feature_addr = ioaddr->cmd_addr + ATA_REG_FEATURE;
5010 ioaddr->nsect_addr = ioaddr->cmd_addr + ATA_REG_NSECT;
5011 ioaddr->lbal_addr = ioaddr->cmd_addr + ATA_REG_LBAL;
5012 ioaddr->lbam_addr = ioaddr->cmd_addr + ATA_REG_LBAM;
5013 ioaddr->lbah_addr = ioaddr->cmd_addr + ATA_REG_LBAH;
5014 ioaddr->device_addr = ioaddr->cmd_addr + ATA_REG_DEVICE;
5015 ioaddr->status_addr = ioaddr->cmd_addr + ATA_REG_STATUS;
5016 ioaddr->command_addr = ioaddr->cmd_addr + ATA_REG_CMD;
5022 void ata_pci_host_stop (struct ata_host_set *host_set)
5024 struct pci_dev *pdev = to_pci_dev(host_set->dev);
5026 pci_iounmap(pdev, host_set->mmio_base);
5030 * ata_pci_remove_one - PCI layer callback for device removal
5031 * @pdev: PCI device that was removed
5033 * PCI layer indicates to libata via this hook that
5034 * hot-unplug or module unload event has occurred.
5035 * Handle this by unregistering all objects associated
5036 * with this PCI device. Free those objects. Then finally
5037 * release PCI resources and disable device.
5040 * Inherited from PCI layer (may sleep).
5043 void ata_pci_remove_one (struct pci_dev *pdev)
5045 struct device *dev = pci_dev_to_dev(pdev);
5046 struct ata_host_set *host_set = dev_get_drvdata(dev);
5048 ata_host_set_remove(host_set);
5049 pci_release_regions(pdev);
5050 pci_disable_device(pdev);
5051 dev_set_drvdata(dev, NULL);
5054 /* move to PCI subsystem */
5055 int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits)
5057 unsigned long tmp = 0;
5059 switch (bits->width) {
5062 pci_read_config_byte(pdev, bits->reg, &tmp8);
5068 pci_read_config_word(pdev, bits->reg, &tmp16);
5074 pci_read_config_dword(pdev, bits->reg, &tmp32);
5085 return (tmp == bits->val) ? 1 : 0;
5088 int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t state)
5090 pci_save_state(pdev);
5091 pci_disable_device(pdev);
5092 pci_set_power_state(pdev, PCI_D3hot);
5096 int ata_pci_device_resume(struct pci_dev *pdev)
5098 pci_set_power_state(pdev, PCI_D0);
5099 pci_restore_state(pdev);
5100 pci_enable_device(pdev);
5101 pci_set_master(pdev);
5104 #endif /* CONFIG_PCI */
5107 static int __init ata_init(void)
5109 ata_wq = create_workqueue("ata");
5113 printk(KERN_DEBUG "libata version " DRV_VERSION " loaded.\n");
5117 static void __exit ata_exit(void)
5119 destroy_workqueue(ata_wq);
5122 module_init(ata_init);
5123 module_exit(ata_exit);
5125 static unsigned long ratelimit_time;
5126 static spinlock_t ata_ratelimit_lock = SPIN_LOCK_UNLOCKED;
5128 int ata_ratelimit(void)
5131 unsigned long flags;
5133 spin_lock_irqsave(&ata_ratelimit_lock, flags);
5135 if (time_after(jiffies, ratelimit_time)) {
5137 ratelimit_time = jiffies + (HZ/5);
5141 spin_unlock_irqrestore(&ata_ratelimit_lock, flags);
5147 * libata is essentially a library of internal helper functions for
5148 * low-level ATA host controller drivers. As such, the API/ABI is
5149 * likely to change as new drivers are added and updated.
5150 * Do not depend on ABI/API stability.
5153 EXPORT_SYMBOL_GPL(ata_std_bios_param);
5154 EXPORT_SYMBOL_GPL(ata_std_ports);
5155 EXPORT_SYMBOL_GPL(ata_device_add);
5156 EXPORT_SYMBOL_GPL(ata_host_set_remove);
5157 EXPORT_SYMBOL_GPL(ata_sg_init);
5158 EXPORT_SYMBOL_GPL(ata_sg_init_one);
5159 EXPORT_SYMBOL_GPL(__ata_qc_complete);
5160 EXPORT_SYMBOL_GPL(ata_qc_issue_prot);
5161 EXPORT_SYMBOL_GPL(ata_eng_timeout);
5162 EXPORT_SYMBOL_GPL(ata_tf_load);
5163 EXPORT_SYMBOL_GPL(ata_tf_read);
5164 EXPORT_SYMBOL_GPL(ata_noop_dev_select);
5165 EXPORT_SYMBOL_GPL(ata_std_dev_select);
5166 EXPORT_SYMBOL_GPL(ata_tf_to_fis);
5167 EXPORT_SYMBOL_GPL(ata_tf_from_fis);
5168 EXPORT_SYMBOL_GPL(ata_check_status);
5169 EXPORT_SYMBOL_GPL(ata_altstatus);
5170 EXPORT_SYMBOL_GPL(ata_exec_command);
5171 EXPORT_SYMBOL_GPL(ata_port_start);
5172 EXPORT_SYMBOL_GPL(ata_port_stop);
5173 EXPORT_SYMBOL_GPL(ata_host_stop);
5174 EXPORT_SYMBOL_GPL(ata_interrupt);
5175 EXPORT_SYMBOL_GPL(ata_qc_prep);
5176 EXPORT_SYMBOL_GPL(ata_noop_qc_prep);
5177 EXPORT_SYMBOL_GPL(ata_bmdma_setup);
5178 EXPORT_SYMBOL_GPL(ata_bmdma_start);
5179 EXPORT_SYMBOL_GPL(ata_bmdma_irq_clear);
5180 EXPORT_SYMBOL_GPL(ata_bmdma_status);
5181 EXPORT_SYMBOL_GPL(ata_bmdma_stop);
5182 EXPORT_SYMBOL_GPL(ata_port_probe);
5183 EXPORT_SYMBOL_GPL(sata_phy_reset);
5184 EXPORT_SYMBOL_GPL(__sata_phy_reset);
5185 EXPORT_SYMBOL_GPL(ata_bus_reset);
5186 EXPORT_SYMBOL_GPL(ata_std_probeinit);
5187 EXPORT_SYMBOL_GPL(ata_std_softreset);
5188 EXPORT_SYMBOL_GPL(sata_std_hardreset);
5189 EXPORT_SYMBOL_GPL(ata_std_postreset);
5190 EXPORT_SYMBOL_GPL(ata_std_probe_reset);
5191 EXPORT_SYMBOL_GPL(ata_drive_probe_reset);
5192 EXPORT_SYMBOL_GPL(ata_dev_revalidate);
5193 EXPORT_SYMBOL_GPL(ata_dev_classify);
5194 EXPORT_SYMBOL_GPL(ata_dev_pair);
5195 EXPORT_SYMBOL_GPL(ata_port_disable);
5196 EXPORT_SYMBOL_GPL(ata_ratelimit);
5197 EXPORT_SYMBOL_GPL(ata_busy_sleep);
5198 EXPORT_SYMBOL_GPL(ata_port_queue_task);
5199 EXPORT_SYMBOL_GPL(ata_scsi_ioctl);
5200 EXPORT_SYMBOL_GPL(ata_scsi_queuecmd);
5201 EXPORT_SYMBOL_GPL(ata_scsi_error);
5202 EXPORT_SYMBOL_GPL(ata_scsi_slave_config);
5203 EXPORT_SYMBOL_GPL(ata_scsi_release);
5204 EXPORT_SYMBOL_GPL(ata_host_intr);
5205 EXPORT_SYMBOL_GPL(ata_id_string);
5206 EXPORT_SYMBOL_GPL(ata_id_c_string);
5207 EXPORT_SYMBOL_GPL(ata_scsi_simulate);
5208 EXPORT_SYMBOL_GPL(ata_eh_qc_complete);
5209 EXPORT_SYMBOL_GPL(ata_eh_qc_retry);
5211 EXPORT_SYMBOL_GPL(ata_pio_need_iordy);
5212 EXPORT_SYMBOL_GPL(ata_timing_compute);
5213 EXPORT_SYMBOL_GPL(ata_timing_merge);
5216 EXPORT_SYMBOL_GPL(pci_test_config_bits);
5217 EXPORT_SYMBOL_GPL(ata_pci_host_stop);
5218 EXPORT_SYMBOL_GPL(ata_pci_init_native_mode);
5219 EXPORT_SYMBOL_GPL(ata_pci_init_one);
5220 EXPORT_SYMBOL_GPL(ata_pci_remove_one);
5221 EXPORT_SYMBOL_GPL(ata_pci_device_suspend);
5222 EXPORT_SYMBOL_GPL(ata_pci_device_resume);
5223 EXPORT_SYMBOL_GPL(ata_pci_default_filter);
5224 EXPORT_SYMBOL_GPL(ata_pci_clear_simplex);
5225 #endif /* CONFIG_PCI */
5227 EXPORT_SYMBOL_GPL(ata_device_suspend);
5228 EXPORT_SYMBOL_GPL(ata_device_resume);
5229 EXPORT_SYMBOL_GPL(ata_scsi_device_suspend);
5230 EXPORT_SYMBOL_GPL(ata_scsi_device_resume);