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);
1304 /* ATAPI-specific feature tests */
1305 else if (dev->class == ATA_DEV_ATAPI) {
1306 rc = atapi_cdb_len(id);
1307 if ((rc < 12) || (rc > ATAPI_CDB_LEN)) {
1308 printk(KERN_WARNING "ata%u: unsupported CDB len\n", ap->id);
1312 dev->cdb_len = (unsigned int) rc;
1314 if (ata_id_cdb_intr(dev->id))
1315 dev->flags |= ATA_DFLAG_CDB_INTR;
1317 /* print device info to dmesg */
1319 printk(KERN_INFO "ata%u: dev %u ATAPI, max %s\n",
1320 ap->id, dev->devno, ata_mode_string(xfer_mask));
1323 ap->host->max_cmd_len = 0;
1324 for (i = 0; i < ATA_MAX_DEVICES; i++)
1325 ap->host->max_cmd_len = max_t(unsigned int,
1326 ap->host->max_cmd_len,
1327 ap->device[i].cdb_len);
1329 /* limit bridge transfers to udma5, 200 sectors */
1330 if (ata_dev_knobble(ap, dev)) {
1332 printk(KERN_INFO "ata%u(%u): applying bridge limits\n",
1333 ap->id, dev->devno);
1334 dev->udma_mask &= ATA_UDMA5;
1335 dev->max_sectors = ATA_MAX_SECTORS;
1338 if (ap->ops->dev_config)
1339 ap->ops->dev_config(ap, dev);
1341 DPRINTK("EXIT, drv_stat = 0x%x\n", ata_chk_status(ap));
1345 DPRINTK("EXIT, err\n");
1350 * ata_bus_probe - Reset and probe ATA bus
1353 * Master ATA bus probing function. Initiates a hardware-dependent
1354 * bus reset, then attempts to identify any devices found on
1358 * PCI/etc. bus probe sem.
1361 * Zero on success, non-zero on error.
1364 static int ata_bus_probe(struct ata_port *ap)
1366 unsigned int classes[ATA_MAX_DEVICES];
1367 unsigned int i, rc, found = 0;
1371 /* reset and determine device classes */
1372 for (i = 0; i < ATA_MAX_DEVICES; i++)
1373 classes[i] = ATA_DEV_UNKNOWN;
1375 if (ap->ops->probe_reset) {
1376 rc = ap->ops->probe_reset(ap, classes);
1378 printk("ata%u: reset failed (errno=%d)\n", ap->id, rc);
1382 ap->ops->phy_reset(ap);
1384 if (!(ap->flags & ATA_FLAG_PORT_DISABLED))
1385 for (i = 0; i < ATA_MAX_DEVICES; i++)
1386 classes[i] = ap->device[i].class;
1391 for (i = 0; i < ATA_MAX_DEVICES; i++)
1392 if (classes[i] == ATA_DEV_UNKNOWN)
1393 classes[i] = ATA_DEV_NONE;
1395 /* read IDENTIFY page and configure devices */
1396 for (i = 0; i < ATA_MAX_DEVICES; i++) {
1397 struct ata_device *dev = &ap->device[i];
1399 dev->class = classes[i];
1401 if (!ata_dev_present(dev))
1404 WARN_ON(dev->id != NULL);
1405 if (ata_dev_read_id(ap, dev, &dev->class, 1, &dev->id)) {
1406 dev->class = ATA_DEV_NONE;
1410 if (ata_dev_configure(ap, dev, 1)) {
1411 ata_dev_disable(ap, dev);
1419 goto err_out_disable;
1422 if (ap->flags & ATA_FLAG_PORT_DISABLED)
1423 goto err_out_disable;
1428 ap->ops->port_disable(ap);
1433 * ata_port_probe - Mark port as enabled
1434 * @ap: Port for which we indicate enablement
1436 * Modify @ap data structure such that the system
1437 * thinks that the entire port is enabled.
1439 * LOCKING: host_set lock, or some other form of
1443 void ata_port_probe(struct ata_port *ap)
1445 ap->flags &= ~ATA_FLAG_PORT_DISABLED;
1449 * sata_print_link_status - Print SATA link status
1450 * @ap: SATA port to printk link status about
1452 * This function prints link speed and status of a SATA link.
1457 static void sata_print_link_status(struct ata_port *ap)
1462 if (!ap->ops->scr_read)
1465 sstatus = scr_read(ap, SCR_STATUS);
1467 if (sata_dev_present(ap)) {
1468 tmp = (sstatus >> 4) & 0xf;
1471 else if (tmp & (1 << 1))
1474 speed = "<unknown>";
1475 printk(KERN_INFO "ata%u: SATA link up %s Gbps (SStatus %X)\n",
1476 ap->id, speed, sstatus);
1478 printk(KERN_INFO "ata%u: SATA link down (SStatus %X)\n",
1484 * __sata_phy_reset - Wake/reset a low-level SATA PHY
1485 * @ap: SATA port associated with target SATA PHY.
1487 * This function issues commands to standard SATA Sxxx
1488 * PHY registers, to wake up the phy (and device), and
1489 * clear any reset condition.
1492 * PCI/etc. bus probe sem.
1495 void __sata_phy_reset(struct ata_port *ap)
1498 unsigned long timeout = jiffies + (HZ * 5);
1500 if (ap->flags & ATA_FLAG_SATA_RESET) {
1501 /* issue phy wake/reset */
1502 scr_write_flush(ap, SCR_CONTROL, 0x301);
1503 /* Couldn't find anything in SATA I/II specs, but
1504 * AHCI-1.1 10.4.2 says at least 1 ms. */
1507 scr_write_flush(ap, SCR_CONTROL, 0x300); /* phy wake/clear reset */
1509 /* wait for phy to become ready, if necessary */
1512 sstatus = scr_read(ap, SCR_STATUS);
1513 if ((sstatus & 0xf) != 1)
1515 } while (time_before(jiffies, timeout));
1517 /* print link status */
1518 sata_print_link_status(ap);
1520 /* TODO: phy layer with polling, timeouts, etc. */
1521 if (sata_dev_present(ap))
1524 ata_port_disable(ap);
1526 if (ap->flags & ATA_FLAG_PORT_DISABLED)
1529 if (ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT)) {
1530 ata_port_disable(ap);
1534 ap->cbl = ATA_CBL_SATA;
1538 * sata_phy_reset - Reset SATA bus.
1539 * @ap: SATA port associated with target SATA PHY.
1541 * This function resets the SATA bus, and then probes
1542 * the bus for devices.
1545 * PCI/etc. bus probe sem.
1548 void sata_phy_reset(struct ata_port *ap)
1550 __sata_phy_reset(ap);
1551 if (ap->flags & ATA_FLAG_PORT_DISABLED)
1557 * ata_dev_pair - return other device on cable
1561 * Obtain the other device on the same cable, or if none is
1562 * present NULL is returned
1565 struct ata_device *ata_dev_pair(struct ata_port *ap, struct ata_device *adev)
1567 struct ata_device *pair = &ap->device[1 - adev->devno];
1568 if (!ata_dev_present(pair))
1574 * ata_port_disable - Disable port.
1575 * @ap: Port to be disabled.
1577 * Modify @ap data structure such that the system
1578 * thinks that the entire port is disabled, and should
1579 * never attempt to probe or communicate with devices
1582 * LOCKING: host_set lock, or some other form of
1586 void ata_port_disable(struct ata_port *ap)
1588 ap->device[0].class = ATA_DEV_NONE;
1589 ap->device[1].class = ATA_DEV_NONE;
1590 ap->flags |= ATA_FLAG_PORT_DISABLED;
1594 * This mode timing computation functionality is ported over from
1595 * drivers/ide/ide-timing.h and was originally written by Vojtech Pavlik
1598 * PIO 0-5, MWDMA 0-2 and UDMA 0-6 timings (in nanoseconds).
1599 * These were taken from ATA/ATAPI-6 standard, rev 0a, except
1600 * for PIO 5, which is a nonstandard extension and UDMA6, which
1601 * is currently supported only by Maxtor drives.
1604 static const struct ata_timing ata_timing[] = {
1606 { XFER_UDMA_6, 0, 0, 0, 0, 0, 0, 0, 15 },
1607 { XFER_UDMA_5, 0, 0, 0, 0, 0, 0, 0, 20 },
1608 { XFER_UDMA_4, 0, 0, 0, 0, 0, 0, 0, 30 },
1609 { XFER_UDMA_3, 0, 0, 0, 0, 0, 0, 0, 45 },
1611 { XFER_UDMA_2, 0, 0, 0, 0, 0, 0, 0, 60 },
1612 { XFER_UDMA_1, 0, 0, 0, 0, 0, 0, 0, 80 },
1613 { XFER_UDMA_0, 0, 0, 0, 0, 0, 0, 0, 120 },
1615 /* { XFER_UDMA_SLOW, 0, 0, 0, 0, 0, 0, 0, 150 }, */
1617 { XFER_MW_DMA_2, 25, 0, 0, 0, 70, 25, 120, 0 },
1618 { XFER_MW_DMA_1, 45, 0, 0, 0, 80, 50, 150, 0 },
1619 { XFER_MW_DMA_0, 60, 0, 0, 0, 215, 215, 480, 0 },
1621 { XFER_SW_DMA_2, 60, 0, 0, 0, 120, 120, 240, 0 },
1622 { XFER_SW_DMA_1, 90, 0, 0, 0, 240, 240, 480, 0 },
1623 { XFER_SW_DMA_0, 120, 0, 0, 0, 480, 480, 960, 0 },
1625 /* { XFER_PIO_5, 20, 50, 30, 100, 50, 30, 100, 0 }, */
1626 { XFER_PIO_4, 25, 70, 25, 120, 70, 25, 120, 0 },
1627 { XFER_PIO_3, 30, 80, 70, 180, 80, 70, 180, 0 },
1629 { XFER_PIO_2, 30, 290, 40, 330, 100, 90, 240, 0 },
1630 { XFER_PIO_1, 50, 290, 93, 383, 125, 100, 383, 0 },
1631 { XFER_PIO_0, 70, 290, 240, 600, 165, 150, 600, 0 },
1633 /* { XFER_PIO_SLOW, 120, 290, 240, 960, 290, 240, 960, 0 }, */
1638 #define ENOUGH(v,unit) (((v)-1)/(unit)+1)
1639 #define EZ(v,unit) ((v)?ENOUGH(v,unit):0)
1641 static void ata_timing_quantize(const struct ata_timing *t, struct ata_timing *q, int T, int UT)
1643 q->setup = EZ(t->setup * 1000, T);
1644 q->act8b = EZ(t->act8b * 1000, T);
1645 q->rec8b = EZ(t->rec8b * 1000, T);
1646 q->cyc8b = EZ(t->cyc8b * 1000, T);
1647 q->active = EZ(t->active * 1000, T);
1648 q->recover = EZ(t->recover * 1000, T);
1649 q->cycle = EZ(t->cycle * 1000, T);
1650 q->udma = EZ(t->udma * 1000, UT);
1653 void ata_timing_merge(const struct ata_timing *a, const struct ata_timing *b,
1654 struct ata_timing *m, unsigned int what)
1656 if (what & ATA_TIMING_SETUP ) m->setup = max(a->setup, b->setup);
1657 if (what & ATA_TIMING_ACT8B ) m->act8b = max(a->act8b, b->act8b);
1658 if (what & ATA_TIMING_REC8B ) m->rec8b = max(a->rec8b, b->rec8b);
1659 if (what & ATA_TIMING_CYC8B ) m->cyc8b = max(a->cyc8b, b->cyc8b);
1660 if (what & ATA_TIMING_ACTIVE ) m->active = max(a->active, b->active);
1661 if (what & ATA_TIMING_RECOVER) m->recover = max(a->recover, b->recover);
1662 if (what & ATA_TIMING_CYCLE ) m->cycle = max(a->cycle, b->cycle);
1663 if (what & ATA_TIMING_UDMA ) m->udma = max(a->udma, b->udma);
1666 static const struct ata_timing* ata_timing_find_mode(unsigned short speed)
1668 const struct ata_timing *t;
1670 for (t = ata_timing; t->mode != speed; t++)
1671 if (t->mode == 0xFF)
1676 int ata_timing_compute(struct ata_device *adev, unsigned short speed,
1677 struct ata_timing *t, int T, int UT)
1679 const struct ata_timing *s;
1680 struct ata_timing p;
1686 if (!(s = ata_timing_find_mode(speed)))
1689 memcpy(t, s, sizeof(*s));
1692 * If the drive is an EIDE drive, it can tell us it needs extended
1693 * PIO/MW_DMA cycle timing.
1696 if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE drive */
1697 memset(&p, 0, sizeof(p));
1698 if(speed >= XFER_PIO_0 && speed <= XFER_SW_DMA_0) {
1699 if (speed <= XFER_PIO_2) p.cycle = p.cyc8b = adev->id[ATA_ID_EIDE_PIO];
1700 else p.cycle = p.cyc8b = adev->id[ATA_ID_EIDE_PIO_IORDY];
1701 } else if(speed >= XFER_MW_DMA_0 && speed <= XFER_MW_DMA_2) {
1702 p.cycle = adev->id[ATA_ID_EIDE_DMA_MIN];
1704 ata_timing_merge(&p, t, t, ATA_TIMING_CYCLE | ATA_TIMING_CYC8B);
1708 * Convert the timing to bus clock counts.
1711 ata_timing_quantize(t, t, T, UT);
1714 * Even in DMA/UDMA modes we still use PIO access for IDENTIFY,
1715 * S.M.A.R.T * and some other commands. We have to ensure that the
1716 * DMA cycle timing is slower/equal than the fastest PIO timing.
1719 if (speed > XFER_PIO_4) {
1720 ata_timing_compute(adev, adev->pio_mode, &p, T, UT);
1721 ata_timing_merge(&p, t, t, ATA_TIMING_ALL);
1725 * Lengthen active & recovery time so that cycle time is correct.
1728 if (t->act8b + t->rec8b < t->cyc8b) {
1729 t->act8b += (t->cyc8b - (t->act8b + t->rec8b)) / 2;
1730 t->rec8b = t->cyc8b - t->act8b;
1733 if (t->active + t->recover < t->cycle) {
1734 t->active += (t->cycle - (t->active + t->recover)) / 2;
1735 t->recover = t->cycle - t->active;
1741 static int ata_dev_set_mode(struct ata_port *ap, struct ata_device *dev)
1743 unsigned int err_mask;
1746 if (dev->xfer_shift == ATA_SHIFT_PIO)
1747 dev->flags |= ATA_DFLAG_PIO;
1749 err_mask = ata_dev_set_xfermode(ap, dev);
1752 "ata%u: failed to set xfermode (err_mask=0x%x)\n",
1757 rc = ata_dev_revalidate(ap, dev, 0);
1760 "ata%u: failed to revalidate after set xfermode\n",
1765 DPRINTK("xfer_shift=%u, xfer_mode=0x%x\n",
1766 dev->xfer_shift, (int)dev->xfer_mode);
1768 printk(KERN_INFO "ata%u: dev %u configured for %s\n",
1770 ata_mode_string(ata_xfer_mode2mask(dev->xfer_mode)));
1774 static int ata_host_set_pio(struct ata_port *ap)
1778 for (i = 0; i < ATA_MAX_DEVICES; i++) {
1779 struct ata_device *dev = &ap->device[i];
1781 if (!ata_dev_present(dev))
1784 if (!dev->pio_mode) {
1785 printk(KERN_WARNING "ata%u: no PIO support for device %d.\n", ap->id, i);
1789 dev->xfer_mode = dev->pio_mode;
1790 dev->xfer_shift = ATA_SHIFT_PIO;
1791 if (ap->ops->set_piomode)
1792 ap->ops->set_piomode(ap, dev);
1798 static void ata_host_set_dma(struct ata_port *ap)
1802 for (i = 0; i < ATA_MAX_DEVICES; i++) {
1803 struct ata_device *dev = &ap->device[i];
1805 if (!ata_dev_present(dev) || !dev->dma_mode)
1808 dev->xfer_mode = dev->dma_mode;
1809 dev->xfer_shift = ata_xfer_mode2shift(dev->dma_mode);
1810 if (ap->ops->set_dmamode)
1811 ap->ops->set_dmamode(ap, dev);
1816 * ata_set_mode - Program timings and issue SET FEATURES - XFER
1817 * @ap: port on which timings will be programmed
1819 * Set ATA device disk transfer mode (PIO3, UDMA6, etc.).
1822 * PCI/etc. bus probe sem.
1824 static void ata_set_mode(struct ata_port *ap)
1828 /* step 1: calculate xfer_mask */
1829 for (i = 0; i < ATA_MAX_DEVICES; i++) {
1830 struct ata_device *dev = &ap->device[i];
1831 unsigned int pio_mask, dma_mask;
1833 if (!ata_dev_present(dev))
1836 ata_dev_xfermask(ap, dev);
1838 /* TODO: let LLDD filter dev->*_mask here */
1840 pio_mask = ata_pack_xfermask(dev->pio_mask, 0, 0);
1841 dma_mask = ata_pack_xfermask(0, dev->mwdma_mask, dev->udma_mask);
1842 dev->pio_mode = ata_xfer_mask2mode(pio_mask);
1843 dev->dma_mode = ata_xfer_mask2mode(dma_mask);
1846 /* step 2: always set host PIO timings */
1847 rc = ata_host_set_pio(ap);
1851 /* step 3: set host DMA timings */
1852 ata_host_set_dma(ap);
1854 /* step 4: update devices' xfer mode */
1855 for (i = 0; i < ATA_MAX_DEVICES; i++) {
1856 struct ata_device *dev = &ap->device[i];
1858 if (!ata_dev_present(dev))
1861 if (ata_dev_set_mode(ap, dev))
1865 if (ap->ops->post_set_mode)
1866 ap->ops->post_set_mode(ap);
1871 ata_port_disable(ap);
1875 * ata_tf_to_host - issue ATA taskfile to host controller
1876 * @ap: port to which command is being issued
1877 * @tf: ATA taskfile register set
1879 * Issues ATA taskfile register set to ATA host controller,
1880 * with proper synchronization with interrupt handler and
1884 * spin_lock_irqsave(host_set lock)
1887 static inline void ata_tf_to_host(struct ata_port *ap,
1888 const struct ata_taskfile *tf)
1890 ap->ops->tf_load(ap, tf);
1891 ap->ops->exec_command(ap, tf);
1895 * ata_busy_sleep - sleep until BSY clears, or timeout
1896 * @ap: port containing status register to be polled
1897 * @tmout_pat: impatience timeout
1898 * @tmout: overall timeout
1900 * Sleep until ATA Status register bit BSY clears,
1901 * or a timeout occurs.
1906 unsigned int ata_busy_sleep (struct ata_port *ap,
1907 unsigned long tmout_pat, unsigned long tmout)
1909 unsigned long timer_start, timeout;
1912 status = ata_busy_wait(ap, ATA_BUSY, 300);
1913 timer_start = jiffies;
1914 timeout = timer_start + tmout_pat;
1915 while ((status & ATA_BUSY) && (time_before(jiffies, timeout))) {
1917 status = ata_busy_wait(ap, ATA_BUSY, 3);
1920 if (status & ATA_BUSY)
1921 printk(KERN_WARNING "ata%u is slow to respond, "
1922 "please be patient\n", ap->id);
1924 timeout = timer_start + tmout;
1925 while ((status & ATA_BUSY) && (time_before(jiffies, timeout))) {
1927 status = ata_chk_status(ap);
1930 if (status & ATA_BUSY) {
1931 printk(KERN_ERR "ata%u failed to respond (%lu secs)\n",
1932 ap->id, tmout / HZ);
1939 static void ata_bus_post_reset(struct ata_port *ap, unsigned int devmask)
1941 struct ata_ioports *ioaddr = &ap->ioaddr;
1942 unsigned int dev0 = devmask & (1 << 0);
1943 unsigned int dev1 = devmask & (1 << 1);
1944 unsigned long timeout;
1946 /* if device 0 was found in ata_devchk, wait for its
1950 ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT);
1952 /* if device 1 was found in ata_devchk, wait for
1953 * register access, then wait for BSY to clear
1955 timeout = jiffies + ATA_TMOUT_BOOT;
1959 ap->ops->dev_select(ap, 1);
1960 if (ap->flags & ATA_FLAG_MMIO) {
1961 nsect = readb((void __iomem *) ioaddr->nsect_addr);
1962 lbal = readb((void __iomem *) ioaddr->lbal_addr);
1964 nsect = inb(ioaddr->nsect_addr);
1965 lbal = inb(ioaddr->lbal_addr);
1967 if ((nsect == 1) && (lbal == 1))
1969 if (time_after(jiffies, timeout)) {
1973 msleep(50); /* give drive a breather */
1976 ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT);
1978 /* is all this really necessary? */
1979 ap->ops->dev_select(ap, 0);
1981 ap->ops->dev_select(ap, 1);
1983 ap->ops->dev_select(ap, 0);
1986 static unsigned int ata_bus_softreset(struct ata_port *ap,
1987 unsigned int devmask)
1989 struct ata_ioports *ioaddr = &ap->ioaddr;
1991 DPRINTK("ata%u: bus reset via SRST\n", ap->id);
1993 /* software reset. causes dev0 to be selected */
1994 if (ap->flags & ATA_FLAG_MMIO) {
1995 writeb(ap->ctl, (void __iomem *) ioaddr->ctl_addr);
1996 udelay(20); /* FIXME: flush */
1997 writeb(ap->ctl | ATA_SRST, (void __iomem *) ioaddr->ctl_addr);
1998 udelay(20); /* FIXME: flush */
1999 writeb(ap->ctl, (void __iomem *) ioaddr->ctl_addr);
2001 outb(ap->ctl, ioaddr->ctl_addr);
2003 outb(ap->ctl | ATA_SRST, ioaddr->ctl_addr);
2005 outb(ap->ctl, ioaddr->ctl_addr);
2008 /* spec mandates ">= 2ms" before checking status.
2009 * We wait 150ms, because that was the magic delay used for
2010 * ATAPI devices in Hale Landis's ATADRVR, for the period of time
2011 * between when the ATA command register is written, and then
2012 * status is checked. Because waiting for "a while" before
2013 * checking status is fine, post SRST, we perform this magic
2014 * delay here as well.
2016 * Old drivers/ide uses the 2mS rule and then waits for ready
2021 /* Before we perform post reset processing we want to see if
2022 the bus shows 0xFF because the odd clown forgets the D7 pulldown
2025 if (ata_check_status(ap) == 0xFF)
2026 return 1; /* Positive is failure for some reason */
2028 ata_bus_post_reset(ap, devmask);
2034 * ata_bus_reset - reset host port and associated ATA channel
2035 * @ap: port to reset
2037 * This is typically the first time we actually start issuing
2038 * commands to the ATA channel. We wait for BSY to clear, then
2039 * issue EXECUTE DEVICE DIAGNOSTIC command, polling for its
2040 * result. Determine what devices, if any, are on the channel
2041 * by looking at the device 0/1 error register. Look at the signature
2042 * stored in each device's taskfile registers, to determine if
2043 * the device is ATA or ATAPI.
2046 * PCI/etc. bus probe sem.
2047 * Obtains host_set lock.
2050 * Sets ATA_FLAG_PORT_DISABLED if bus reset fails.
2053 void ata_bus_reset(struct ata_port *ap)
2055 struct ata_ioports *ioaddr = &ap->ioaddr;
2056 unsigned int slave_possible = ap->flags & ATA_FLAG_SLAVE_POSS;
2058 unsigned int dev0, dev1 = 0, devmask = 0;
2060 DPRINTK("ENTER, host %u, port %u\n", ap->id, ap->port_no);
2062 /* determine if device 0/1 are present */
2063 if (ap->flags & ATA_FLAG_SATA_RESET)
2066 dev0 = ata_devchk(ap, 0);
2068 dev1 = ata_devchk(ap, 1);
2072 devmask |= (1 << 0);
2074 devmask |= (1 << 1);
2076 /* select device 0 again */
2077 ap->ops->dev_select(ap, 0);
2079 /* issue bus reset */
2080 if (ap->flags & ATA_FLAG_SRST)
2081 if (ata_bus_softreset(ap, devmask))
2085 * determine by signature whether we have ATA or ATAPI devices
2087 ap->device[0].class = ata_dev_try_classify(ap, 0, &err);
2088 if ((slave_possible) && (err != 0x81))
2089 ap->device[1].class = ata_dev_try_classify(ap, 1, &err);
2091 /* re-enable interrupts */
2092 if (ap->ioaddr.ctl_addr) /* FIXME: hack. create a hook instead */
2095 /* is double-select really necessary? */
2096 if (ap->device[1].class != ATA_DEV_NONE)
2097 ap->ops->dev_select(ap, 1);
2098 if (ap->device[0].class != ATA_DEV_NONE)
2099 ap->ops->dev_select(ap, 0);
2101 /* if no devices were detected, disable this port */
2102 if ((ap->device[0].class == ATA_DEV_NONE) &&
2103 (ap->device[1].class == ATA_DEV_NONE))
2106 if (ap->flags & (ATA_FLAG_SATA_RESET | ATA_FLAG_SRST)) {
2107 /* set up device control for ATA_FLAG_SATA_RESET */
2108 if (ap->flags & ATA_FLAG_MMIO)
2109 writeb(ap->ctl, (void __iomem *) ioaddr->ctl_addr);
2111 outb(ap->ctl, ioaddr->ctl_addr);
2118 printk(KERN_ERR "ata%u: disabling port\n", ap->id);
2119 ap->ops->port_disable(ap);
2124 static int sata_phy_resume(struct ata_port *ap)
2126 unsigned long timeout = jiffies + (HZ * 5);
2129 scr_write_flush(ap, SCR_CONTROL, 0x300);
2131 /* Wait for phy to become ready, if necessary. */
2134 sstatus = scr_read(ap, SCR_STATUS);
2135 if ((sstatus & 0xf) != 1)
2137 } while (time_before(jiffies, timeout));
2143 * ata_std_probeinit - initialize probing
2144 * @ap: port to be probed
2146 * @ap is about to be probed. Initialize it. This function is
2147 * to be used as standard callback for ata_drive_probe_reset().
2149 * NOTE!!! Do not use this function as probeinit if a low level
2150 * driver implements only hardreset. Just pass NULL as probeinit
2151 * in that case. Using this function is probably okay but doing
2152 * so makes reset sequence different from the original
2153 * ->phy_reset implementation and Jeff nervous. :-P
2155 extern void ata_std_probeinit(struct ata_port *ap)
2157 if (ap->flags & ATA_FLAG_SATA && ap->ops->scr_read) {
2158 sata_phy_resume(ap);
2159 if (sata_dev_present(ap))
2160 ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT);
2165 * ata_std_softreset - reset host port via ATA SRST
2166 * @ap: port to reset
2167 * @verbose: fail verbosely
2168 * @classes: resulting classes of attached devices
2170 * Reset host port using ATA SRST. This function is to be used
2171 * as standard callback for ata_drive_*_reset() functions.
2174 * Kernel thread context (may sleep)
2177 * 0 on success, -errno otherwise.
2179 int ata_std_softreset(struct ata_port *ap, int verbose, unsigned int *classes)
2181 unsigned int slave_possible = ap->flags & ATA_FLAG_SLAVE_POSS;
2182 unsigned int devmask = 0, err_mask;
2187 if (ap->ops->scr_read && !sata_dev_present(ap)) {
2188 classes[0] = ATA_DEV_NONE;
2192 /* determine if device 0/1 are present */
2193 if (ata_devchk(ap, 0))
2194 devmask |= (1 << 0);
2195 if (slave_possible && ata_devchk(ap, 1))
2196 devmask |= (1 << 1);
2198 /* select device 0 again */
2199 ap->ops->dev_select(ap, 0);
2201 /* issue bus reset */
2202 DPRINTK("about to softreset, devmask=%x\n", devmask);
2203 err_mask = ata_bus_softreset(ap, devmask);
2206 printk(KERN_ERR "ata%u: SRST failed (err_mask=0x%x)\n",
2209 DPRINTK("EXIT, softreset failed (err_mask=0x%x)\n",
2214 /* determine by signature whether we have ATA or ATAPI devices */
2215 classes[0] = ata_dev_try_classify(ap, 0, &err);
2216 if (slave_possible && err != 0x81)
2217 classes[1] = ata_dev_try_classify(ap, 1, &err);
2220 DPRINTK("EXIT, classes[0]=%u [1]=%u\n", classes[0], classes[1]);
2225 * sata_std_hardreset - reset host port via SATA phy reset
2226 * @ap: port to reset
2227 * @verbose: fail verbosely
2228 * @class: resulting class of attached device
2230 * SATA phy-reset host port using DET bits of SControl register.
2231 * This function is to be used as standard callback for
2232 * ata_drive_*_reset().
2235 * Kernel thread context (may sleep)
2238 * 0 on success, -errno otherwise.
2240 int sata_std_hardreset(struct ata_port *ap, int verbose, unsigned int *class)
2244 /* Issue phy wake/reset */
2245 scr_write_flush(ap, SCR_CONTROL, 0x301);
2248 * Couldn't find anything in SATA I/II specs, but AHCI-1.1
2249 * 10.4.2 says at least 1 ms.
2253 /* Bring phy back */
2254 sata_phy_resume(ap);
2256 /* TODO: phy layer with polling, timeouts, etc. */
2257 if (!sata_dev_present(ap)) {
2258 *class = ATA_DEV_NONE;
2259 DPRINTK("EXIT, link offline\n");
2263 if (ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT)) {
2265 printk(KERN_ERR "ata%u: COMRESET failed "
2266 "(device not ready)\n", ap->id);
2268 DPRINTK("EXIT, device not ready\n");
2272 ap->ops->dev_select(ap, 0); /* probably unnecessary */
2274 *class = ata_dev_try_classify(ap, 0, NULL);
2276 DPRINTK("EXIT, class=%u\n", *class);
2281 * ata_std_postreset - standard postreset callback
2282 * @ap: the target ata_port
2283 * @classes: classes of attached devices
2285 * This function is invoked after a successful reset. Note that
2286 * the device might have been reset more than once using
2287 * different reset methods before postreset is invoked.
2289 * This function is to be used as standard callback for
2290 * ata_drive_*_reset().
2293 * Kernel thread context (may sleep)
2295 void ata_std_postreset(struct ata_port *ap, unsigned int *classes)
2299 /* set cable type if it isn't already set */
2300 if (ap->cbl == ATA_CBL_NONE && ap->flags & ATA_FLAG_SATA)
2301 ap->cbl = ATA_CBL_SATA;
2303 /* print link status */
2304 if (ap->cbl == ATA_CBL_SATA)
2305 sata_print_link_status(ap);
2307 /* re-enable interrupts */
2308 if (ap->ioaddr.ctl_addr) /* FIXME: hack. create a hook instead */
2311 /* is double-select really necessary? */
2312 if (classes[0] != ATA_DEV_NONE)
2313 ap->ops->dev_select(ap, 1);
2314 if (classes[1] != ATA_DEV_NONE)
2315 ap->ops->dev_select(ap, 0);
2317 /* bail out if no device is present */
2318 if (classes[0] == ATA_DEV_NONE && classes[1] == ATA_DEV_NONE) {
2319 DPRINTK("EXIT, no device\n");
2323 /* set up device control */
2324 if (ap->ioaddr.ctl_addr) {
2325 if (ap->flags & ATA_FLAG_MMIO)
2326 writeb(ap->ctl, (void __iomem *) ap->ioaddr.ctl_addr);
2328 outb(ap->ctl, ap->ioaddr.ctl_addr);
2335 * ata_std_probe_reset - standard probe reset method
2336 * @ap: prot to perform probe-reset
2337 * @classes: resulting classes of attached devices
2339 * The stock off-the-shelf ->probe_reset method.
2342 * Kernel thread context (may sleep)
2345 * 0 on success, -errno otherwise.
2347 int ata_std_probe_reset(struct ata_port *ap, unsigned int *classes)
2349 ata_reset_fn_t hardreset;
2352 if (ap->flags & ATA_FLAG_SATA && ap->ops->scr_read)
2353 hardreset = sata_std_hardreset;
2355 return ata_drive_probe_reset(ap, ata_std_probeinit,
2356 ata_std_softreset, hardreset,
2357 ata_std_postreset, classes);
2360 static int do_probe_reset(struct ata_port *ap, ata_reset_fn_t reset,
2361 ata_postreset_fn_t postreset,
2362 unsigned int *classes)
2366 for (i = 0; i < ATA_MAX_DEVICES; i++)
2367 classes[i] = ATA_DEV_UNKNOWN;
2369 rc = reset(ap, 0, classes);
2373 /* If any class isn't ATA_DEV_UNKNOWN, consider classification
2374 * is complete and convert all ATA_DEV_UNKNOWN to
2377 for (i = 0; i < ATA_MAX_DEVICES; i++)
2378 if (classes[i] != ATA_DEV_UNKNOWN)
2381 if (i < ATA_MAX_DEVICES)
2382 for (i = 0; i < ATA_MAX_DEVICES; i++)
2383 if (classes[i] == ATA_DEV_UNKNOWN)
2384 classes[i] = ATA_DEV_NONE;
2387 postreset(ap, classes);
2389 return classes[0] != ATA_DEV_UNKNOWN ? 0 : -ENODEV;
2393 * ata_drive_probe_reset - Perform probe reset with given methods
2394 * @ap: port to reset
2395 * @probeinit: probeinit method (can be NULL)
2396 * @softreset: softreset method (can be NULL)
2397 * @hardreset: hardreset method (can be NULL)
2398 * @postreset: postreset method (can be NULL)
2399 * @classes: resulting classes of attached devices
2401 * Reset the specified port and classify attached devices using
2402 * given methods. This function prefers softreset but tries all
2403 * possible reset sequences to reset and classify devices. This
2404 * function is intended to be used for constructing ->probe_reset
2405 * callback by low level drivers.
2407 * Reset methods should follow the following rules.
2409 * - Return 0 on sucess, -errno on failure.
2410 * - If classification is supported, fill classes[] with
2411 * recognized class codes.
2412 * - If classification is not supported, leave classes[] alone.
2413 * - If verbose is non-zero, print error message on failure;
2414 * otherwise, shut up.
2417 * Kernel thread context (may sleep)
2420 * 0 on success, -EINVAL if no reset method is avaliable, -ENODEV
2421 * if classification fails, and any error code from reset
2424 int ata_drive_probe_reset(struct ata_port *ap, ata_probeinit_fn_t probeinit,
2425 ata_reset_fn_t softreset, ata_reset_fn_t hardreset,
2426 ata_postreset_fn_t postreset, unsigned int *classes)
2434 rc = do_probe_reset(ap, softreset, postreset, classes);
2442 rc = do_probe_reset(ap, hardreset, postreset, classes);
2443 if (rc == 0 || rc != -ENODEV)
2447 rc = do_probe_reset(ap, softreset, postreset, classes);
2453 * ata_dev_same_device - Determine whether new ID matches configured device
2454 * @ap: port on which the device to compare against resides
2455 * @dev: device to compare against
2456 * @new_class: class of the new device
2457 * @new_id: IDENTIFY page of the new device
2459 * Compare @new_class and @new_id against @dev and determine
2460 * whether @dev is the device indicated by @new_class and
2467 * 1 if @dev matches @new_class and @new_id, 0 otherwise.
2469 static int ata_dev_same_device(struct ata_port *ap, struct ata_device *dev,
2470 unsigned int new_class, const u16 *new_id)
2472 const u16 *old_id = dev->id;
2473 unsigned char model[2][41], serial[2][21];
2476 if (dev->class != new_class) {
2478 "ata%u: dev %u class mismatch %d != %d\n",
2479 ap->id, dev->devno, dev->class, new_class);
2483 ata_id_c_string(old_id, model[0], ATA_ID_PROD_OFS, sizeof(model[0]));
2484 ata_id_c_string(new_id, model[1], ATA_ID_PROD_OFS, sizeof(model[1]));
2485 ata_id_c_string(old_id, serial[0], ATA_ID_SERNO_OFS, sizeof(serial[0]));
2486 ata_id_c_string(new_id, serial[1], ATA_ID_SERNO_OFS, sizeof(serial[1]));
2487 new_n_sectors = ata_id_n_sectors(new_id);
2489 if (strcmp(model[0], model[1])) {
2491 "ata%u: dev %u model number mismatch '%s' != '%s'\n",
2492 ap->id, dev->devno, model[0], model[1]);
2496 if (strcmp(serial[0], serial[1])) {
2498 "ata%u: dev %u serial number mismatch '%s' != '%s'\n",
2499 ap->id, dev->devno, serial[0], serial[1]);
2503 if (dev->class == ATA_DEV_ATA && dev->n_sectors != new_n_sectors) {
2505 "ata%u: dev %u n_sectors mismatch %llu != %llu\n",
2506 ap->id, dev->devno, (unsigned long long)dev->n_sectors,
2507 (unsigned long long)new_n_sectors);
2515 * ata_dev_revalidate - Revalidate ATA device
2516 * @ap: port on which the device to revalidate resides
2517 * @dev: device to revalidate
2518 * @post_reset: is this revalidation after reset?
2520 * Re-read IDENTIFY page and make sure @dev is still attached to
2524 * Kernel thread context (may sleep)
2527 * 0 on success, negative errno otherwise
2529 int ata_dev_revalidate(struct ata_port *ap, struct ata_device *dev,
2536 if (!ata_dev_present(dev))
2542 /* allocate & read ID data */
2543 rc = ata_dev_read_id(ap, dev, &class, post_reset, &id);
2547 /* is the device still there? */
2548 if (!ata_dev_same_device(ap, dev, class, id)) {
2556 /* configure device according to the new ID */
2557 return ata_dev_configure(ap, dev, 0);
2560 printk(KERN_ERR "ata%u: dev %u revalidation failed (errno=%d)\n",
2561 ap->id, dev->devno, rc);
2566 static const char * const ata_dma_blacklist [] = {
2567 "WDC AC11000H", NULL,
2568 "WDC AC22100H", NULL,
2569 "WDC AC32500H", NULL,
2570 "WDC AC33100H", NULL,
2571 "WDC AC31600H", NULL,
2572 "WDC AC32100H", "24.09P07",
2573 "WDC AC23200L", "21.10N21",
2574 "Compaq CRD-8241B", NULL,
2579 "SanDisk SDP3B", NULL,
2580 "SanDisk SDP3B-64", NULL,
2581 "SANYO CD-ROM CRD", NULL,
2582 "HITACHI CDR-8", NULL,
2583 "HITACHI CDR-8335", NULL,
2584 "HITACHI CDR-8435", NULL,
2585 "Toshiba CD-ROM XM-6202B", NULL,
2586 "TOSHIBA CD-ROM XM-1702BC", NULL,
2588 "E-IDE CD-ROM CR-840", NULL,
2589 "CD-ROM Drive/F5A", NULL,
2590 "WPI CDD-820", NULL,
2591 "SAMSUNG CD-ROM SC-148C", NULL,
2592 "SAMSUNG CD-ROM SC", NULL,
2593 "SanDisk SDP3B-64", NULL,
2594 "ATAPI CD-ROM DRIVE 40X MAXIMUM",NULL,
2595 "_NEC DV5800A", NULL,
2596 "SAMSUNG CD-ROM SN-124", "N001"
2599 static int ata_strim(char *s, size_t len)
2601 len = strnlen(s, len);
2603 /* ATAPI specifies that empty space is blank-filled; remove blanks */
2604 while ((len > 0) && (s[len - 1] == ' ')) {
2611 static int ata_dma_blacklisted(const struct ata_device *dev)
2613 unsigned char model_num[40];
2614 unsigned char model_rev[16];
2615 unsigned int nlen, rlen;
2618 ata_id_string(dev->id, model_num, ATA_ID_PROD_OFS,
2620 ata_id_string(dev->id, model_rev, ATA_ID_FW_REV_OFS,
2622 nlen = ata_strim(model_num, sizeof(model_num));
2623 rlen = ata_strim(model_rev, sizeof(model_rev));
2625 for (i = 0; i < ARRAY_SIZE(ata_dma_blacklist); i += 2) {
2626 if (!strncmp(ata_dma_blacklist[i], model_num, nlen)) {
2627 if (ata_dma_blacklist[i+1] == NULL)
2629 if (!strncmp(ata_dma_blacklist[i], model_rev, rlen))
2637 * ata_dev_xfermask - Compute supported xfermask of the given device
2638 * @ap: Port on which the device to compute xfermask for resides
2639 * @dev: Device to compute xfermask for
2641 * Compute supported xfermask of @dev and store it in
2642 * dev->*_mask. This function is responsible for applying all
2643 * known limits including host controller limits, device
2649 static void ata_dev_xfermask(struct ata_port *ap, struct ata_device *dev)
2651 unsigned long xfer_mask;
2654 xfer_mask = ata_pack_xfermask(ap->pio_mask, ap->mwdma_mask,
2657 /* use port-wide xfermask for now */
2658 for (i = 0; i < ATA_MAX_DEVICES; i++) {
2659 struct ata_device *d = &ap->device[i];
2660 if (!ata_dev_present(d))
2662 xfer_mask &= ata_pack_xfermask(d->pio_mask, d->mwdma_mask,
2664 xfer_mask &= ata_id_xfermask(d->id);
2665 if (ata_dma_blacklisted(d))
2666 xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA);
2669 if (ata_dma_blacklisted(dev))
2670 printk(KERN_WARNING "ata%u: dev %u is on DMA blacklist, "
2671 "disabling DMA\n", ap->id, dev->devno);
2673 ata_unpack_xfermask(xfer_mask, &dev->pio_mask, &dev->mwdma_mask,
2678 * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command
2679 * @ap: Port associated with device @dev
2680 * @dev: Device to which command will be sent
2682 * Issue SET FEATURES - XFER MODE command to device @dev
2686 * PCI/etc. bus probe sem.
2689 * 0 on success, AC_ERR_* mask otherwise.
2692 static unsigned int ata_dev_set_xfermode(struct ata_port *ap,
2693 struct ata_device *dev)
2695 struct ata_taskfile tf;
2696 unsigned int err_mask;
2698 /* set up set-features taskfile */
2699 DPRINTK("set features - xfer mode\n");
2701 ata_tf_init(ap, &tf, dev->devno);
2702 tf.command = ATA_CMD_SET_FEATURES;
2703 tf.feature = SETFEATURES_XFER;
2704 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2705 tf.protocol = ATA_PROT_NODATA;
2706 tf.nsect = dev->xfer_mode;
2708 err_mask = ata_exec_internal(ap, dev, &tf, DMA_NONE, NULL, 0);
2710 DPRINTK("EXIT, err_mask=%x\n", err_mask);
2715 * ata_dev_init_params - Issue INIT DEV PARAMS command
2716 * @ap: Port associated with device @dev
2717 * @dev: Device to which command will be sent
2720 * Kernel thread context (may sleep)
2723 * 0 on success, AC_ERR_* mask otherwise.
2726 static unsigned int ata_dev_init_params(struct ata_port *ap,
2727 struct ata_device *dev)
2729 struct ata_taskfile tf;
2730 unsigned int err_mask;
2731 u16 sectors = dev->id[6];
2732 u16 heads = dev->id[3];
2734 /* Number of sectors per track 1-255. Number of heads 1-16 */
2735 if (sectors < 1 || sectors > 255 || heads < 1 || heads > 16)
2738 /* set up init dev params taskfile */
2739 DPRINTK("init dev params \n");
2741 ata_tf_init(ap, &tf, dev->devno);
2742 tf.command = ATA_CMD_INIT_DEV_PARAMS;
2743 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2744 tf.protocol = ATA_PROT_NODATA;
2746 tf.device |= (heads - 1) & 0x0f; /* max head = num. of heads - 1 */
2748 err_mask = ata_exec_internal(ap, dev, &tf, DMA_NONE, NULL, 0);
2750 DPRINTK("EXIT, err_mask=%x\n", err_mask);
2755 * ata_sg_clean - Unmap DMA memory associated with command
2756 * @qc: Command containing DMA memory to be released
2758 * Unmap all mapped DMA memory associated with this command.
2761 * spin_lock_irqsave(host_set lock)
2764 static void ata_sg_clean(struct ata_queued_cmd *qc)
2766 struct ata_port *ap = qc->ap;
2767 struct scatterlist *sg = qc->__sg;
2768 int dir = qc->dma_dir;
2769 void *pad_buf = NULL;
2771 WARN_ON(!(qc->flags & ATA_QCFLAG_DMAMAP));
2772 WARN_ON(sg == NULL);
2774 if (qc->flags & ATA_QCFLAG_SINGLE)
2775 WARN_ON(qc->n_elem > 1);
2777 VPRINTK("unmapping %u sg elements\n", qc->n_elem);
2779 /* if we padded the buffer out to 32-bit bound, and data
2780 * xfer direction is from-device, we must copy from the
2781 * pad buffer back into the supplied buffer
2783 if (qc->pad_len && !(qc->tf.flags & ATA_TFLAG_WRITE))
2784 pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ);
2786 if (qc->flags & ATA_QCFLAG_SG) {
2788 dma_unmap_sg(ap->dev, sg, qc->n_elem, dir);
2789 /* restore last sg */
2790 sg[qc->orig_n_elem - 1].length += qc->pad_len;
2792 struct scatterlist *psg = &qc->pad_sgent;
2793 void *addr = kmap_atomic(psg->page, KM_IRQ0);
2794 memcpy(addr + psg->offset, pad_buf, qc->pad_len);
2795 kunmap_atomic(addr, KM_IRQ0);
2799 dma_unmap_single(ap->dev,
2800 sg_dma_address(&sg[0]), sg_dma_len(&sg[0]),
2803 sg->length += qc->pad_len;
2805 memcpy(qc->buf_virt + sg->length - qc->pad_len,
2806 pad_buf, qc->pad_len);
2809 qc->flags &= ~ATA_QCFLAG_DMAMAP;
2814 * ata_fill_sg - Fill PCI IDE PRD table
2815 * @qc: Metadata associated with taskfile to be transferred
2817 * Fill PCI IDE PRD (scatter-gather) table with segments
2818 * associated with the current disk command.
2821 * spin_lock_irqsave(host_set lock)
2824 static void ata_fill_sg(struct ata_queued_cmd *qc)
2826 struct ata_port *ap = qc->ap;
2827 struct scatterlist *sg;
2830 WARN_ON(qc->__sg == NULL);
2831 WARN_ON(qc->n_elem == 0 && qc->pad_len == 0);
2834 ata_for_each_sg(sg, qc) {
2838 /* determine if physical DMA addr spans 64K boundary.
2839 * Note h/w doesn't support 64-bit, so we unconditionally
2840 * truncate dma_addr_t to u32.
2842 addr = (u32) sg_dma_address(sg);
2843 sg_len = sg_dma_len(sg);
2846 offset = addr & 0xffff;
2848 if ((offset + sg_len) > 0x10000)
2849 len = 0x10000 - offset;
2851 ap->prd[idx].addr = cpu_to_le32(addr);
2852 ap->prd[idx].flags_len = cpu_to_le32(len & 0xffff);
2853 VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", idx, addr, len);
2862 ap->prd[idx - 1].flags_len |= cpu_to_le32(ATA_PRD_EOT);
2865 * ata_check_atapi_dma - Check whether ATAPI DMA can be supported
2866 * @qc: Metadata associated with taskfile to check
2868 * Allow low-level driver to filter ATA PACKET commands, returning
2869 * a status indicating whether or not it is OK to use DMA for the
2870 * supplied PACKET command.
2873 * spin_lock_irqsave(host_set lock)
2875 * RETURNS: 0 when ATAPI DMA can be used
2878 int ata_check_atapi_dma(struct ata_queued_cmd *qc)
2880 struct ata_port *ap = qc->ap;
2881 int rc = 0; /* Assume ATAPI DMA is OK by default */
2883 if (ap->ops->check_atapi_dma)
2884 rc = ap->ops->check_atapi_dma(qc);
2889 * ata_qc_prep - Prepare taskfile for submission
2890 * @qc: Metadata associated with taskfile to be prepared
2892 * Prepare ATA taskfile for submission.
2895 * spin_lock_irqsave(host_set lock)
2897 void ata_qc_prep(struct ata_queued_cmd *qc)
2899 if (!(qc->flags & ATA_QCFLAG_DMAMAP))
2905 void ata_noop_qc_prep(struct ata_queued_cmd *qc) { }
2908 * ata_sg_init_one - Associate command with memory buffer
2909 * @qc: Command to be associated
2910 * @buf: Memory buffer
2911 * @buflen: Length of memory buffer, in bytes.
2913 * Initialize the data-related elements of queued_cmd @qc
2914 * to point to a single memory buffer, @buf of byte length @buflen.
2917 * spin_lock_irqsave(host_set lock)
2920 void ata_sg_init_one(struct ata_queued_cmd *qc, void *buf, unsigned int buflen)
2922 struct scatterlist *sg;
2924 qc->flags |= ATA_QCFLAG_SINGLE;
2926 memset(&qc->sgent, 0, sizeof(qc->sgent));
2927 qc->__sg = &qc->sgent;
2929 qc->orig_n_elem = 1;
2933 sg_init_one(sg, buf, buflen);
2937 * ata_sg_init - Associate command with scatter-gather table.
2938 * @qc: Command to be associated
2939 * @sg: Scatter-gather table.
2940 * @n_elem: Number of elements in s/g table.
2942 * Initialize the data-related elements of queued_cmd @qc
2943 * to point to a scatter-gather table @sg, containing @n_elem
2947 * spin_lock_irqsave(host_set lock)
2950 void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
2951 unsigned int n_elem)
2953 qc->flags |= ATA_QCFLAG_SG;
2955 qc->n_elem = n_elem;
2956 qc->orig_n_elem = n_elem;
2960 * ata_sg_setup_one - DMA-map the memory buffer associated with a command.
2961 * @qc: Command with memory buffer to be mapped.
2963 * DMA-map the memory buffer associated with queued_cmd @qc.
2966 * spin_lock_irqsave(host_set lock)
2969 * Zero on success, negative on error.
2972 static int ata_sg_setup_one(struct ata_queued_cmd *qc)
2974 struct ata_port *ap = qc->ap;
2975 int dir = qc->dma_dir;
2976 struct scatterlist *sg = qc->__sg;
2977 dma_addr_t dma_address;
2980 /* we must lengthen transfers to end on a 32-bit boundary */
2981 qc->pad_len = sg->length & 3;
2983 void *pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ);
2984 struct scatterlist *psg = &qc->pad_sgent;
2986 WARN_ON(qc->dev->class != ATA_DEV_ATAPI);
2988 memset(pad_buf, 0, ATA_DMA_PAD_SZ);
2990 if (qc->tf.flags & ATA_TFLAG_WRITE)
2991 memcpy(pad_buf, qc->buf_virt + sg->length - qc->pad_len,
2994 sg_dma_address(psg) = ap->pad_dma + (qc->tag * ATA_DMA_PAD_SZ);
2995 sg_dma_len(psg) = ATA_DMA_PAD_SZ;
2997 sg->length -= qc->pad_len;
2998 if (sg->length == 0)
3001 DPRINTK("padding done, sg->length=%u pad_len=%u\n",
3002 sg->length, qc->pad_len);
3010 dma_address = dma_map_single(ap->dev, qc->buf_virt,
3012 if (dma_mapping_error(dma_address)) {
3014 sg->length += qc->pad_len;
3018 sg_dma_address(sg) = dma_address;
3019 sg_dma_len(sg) = sg->length;
3022 DPRINTK("mapped buffer of %d bytes for %s\n", sg_dma_len(sg),
3023 qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read");
3029 * ata_sg_setup - DMA-map the scatter-gather table associated with a command.
3030 * @qc: Command with scatter-gather table to be mapped.
3032 * DMA-map the scatter-gather table associated with queued_cmd @qc.
3035 * spin_lock_irqsave(host_set lock)
3038 * Zero on success, negative on error.
3042 static int ata_sg_setup(struct ata_queued_cmd *qc)
3044 struct ata_port *ap = qc->ap;
3045 struct scatterlist *sg = qc->__sg;
3046 struct scatterlist *lsg = &sg[qc->n_elem - 1];
3047 int n_elem, pre_n_elem, dir, trim_sg = 0;
3049 VPRINTK("ENTER, ata%u\n", ap->id);
3050 WARN_ON(!(qc->flags & ATA_QCFLAG_SG));
3052 /* we must lengthen transfers to end on a 32-bit boundary */
3053 qc->pad_len = lsg->length & 3;
3055 void *pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ);
3056 struct scatterlist *psg = &qc->pad_sgent;
3057 unsigned int offset;
3059 WARN_ON(qc->dev->class != ATA_DEV_ATAPI);
3061 memset(pad_buf, 0, ATA_DMA_PAD_SZ);
3064 * psg->page/offset are used to copy to-be-written
3065 * data in this function or read data in ata_sg_clean.
3067 offset = lsg->offset + lsg->length - qc->pad_len;
3068 psg->page = nth_page(lsg->page, offset >> PAGE_SHIFT);
3069 psg->offset = offset_in_page(offset);
3071 if (qc->tf.flags & ATA_TFLAG_WRITE) {
3072 void *addr = kmap_atomic(psg->page, KM_IRQ0);
3073 memcpy(pad_buf, addr + psg->offset, qc->pad_len);
3074 kunmap_atomic(addr, KM_IRQ0);
3077 sg_dma_address(psg) = ap->pad_dma + (qc->tag * ATA_DMA_PAD_SZ);
3078 sg_dma_len(psg) = ATA_DMA_PAD_SZ;
3080 lsg->length -= qc->pad_len;
3081 if (lsg->length == 0)
3084 DPRINTK("padding done, sg[%d].length=%u pad_len=%u\n",
3085 qc->n_elem - 1, lsg->length, qc->pad_len);
3088 pre_n_elem = qc->n_elem;
3089 if (trim_sg && pre_n_elem)
3098 n_elem = dma_map_sg(ap->dev, sg, pre_n_elem, dir);
3100 /* restore last sg */
3101 lsg->length += qc->pad_len;
3105 DPRINTK("%d sg elements mapped\n", n_elem);
3108 qc->n_elem = n_elem;
3114 * ata_poll_qc_complete - turn irq back on and finish qc
3115 * @qc: Command to complete
3116 * @err_mask: ATA status register content
3119 * None. (grabs host lock)
3122 void ata_poll_qc_complete(struct ata_queued_cmd *qc)
3124 struct ata_port *ap = qc->ap;
3125 unsigned long flags;
3127 spin_lock_irqsave(&ap->host_set->lock, flags);
3129 ata_qc_complete(qc);
3130 spin_unlock_irqrestore(&ap->host_set->lock, flags);
3134 * ata_pio_poll - poll using PIO, depending on current state
3135 * @ap: the target ata_port
3138 * None. (executing in kernel thread context)
3141 * timeout value to use
3144 static unsigned long ata_pio_poll(struct ata_port *ap)
3146 struct ata_queued_cmd *qc;
3148 unsigned int poll_state = HSM_ST_UNKNOWN;
3149 unsigned int reg_state = HSM_ST_UNKNOWN;
3151 qc = ata_qc_from_tag(ap, ap->active_tag);
3152 WARN_ON(qc == NULL);
3154 switch (ap->hsm_task_state) {
3157 poll_state = HSM_ST_POLL;
3161 case HSM_ST_LAST_POLL:
3162 poll_state = HSM_ST_LAST_POLL;
3163 reg_state = HSM_ST_LAST;
3170 status = ata_chk_status(ap);
3171 if (status & ATA_BUSY) {
3172 if (time_after(jiffies, ap->pio_task_timeout)) {
3173 qc->err_mask |= AC_ERR_TIMEOUT;
3174 ap->hsm_task_state = HSM_ST_TMOUT;
3177 ap->hsm_task_state = poll_state;
3178 return ATA_SHORT_PAUSE;
3181 ap->hsm_task_state = reg_state;
3186 * ata_pio_complete - check if drive is busy or idle
3187 * @ap: the target ata_port
3190 * None. (executing in kernel thread context)
3193 * Zero if qc completed.
3194 * Non-zero if has next.
3197 static int ata_pio_complete (struct ata_port *ap)
3199 struct ata_queued_cmd *qc;
3203 * This is purely heuristic. This is a fast path. Sometimes when
3204 * we enter, BSY will be cleared in a chk-status or two. If not,
3205 * the drive is probably seeking or something. Snooze for a couple
3206 * msecs, then chk-status again. If still busy, fall back to
3207 * HSM_ST_LAST_POLL state.
3209 drv_stat = ata_busy_wait(ap, ATA_BUSY, 10);
3210 if (drv_stat & ATA_BUSY) {
3212 drv_stat = ata_busy_wait(ap, ATA_BUSY, 10);
3213 if (drv_stat & ATA_BUSY) {
3214 ap->hsm_task_state = HSM_ST_LAST_POLL;
3215 ap->pio_task_timeout = jiffies + ATA_TMOUT_PIO;
3220 qc = ata_qc_from_tag(ap, ap->active_tag);
3221 WARN_ON(qc == NULL);
3223 drv_stat = ata_wait_idle(ap);
3224 if (!ata_ok(drv_stat)) {
3225 qc->err_mask |= __ac_err_mask(drv_stat);
3226 ap->hsm_task_state = HSM_ST_ERR;
3230 ap->hsm_task_state = HSM_ST_IDLE;
3232 WARN_ON(qc->err_mask);
3233 ata_poll_qc_complete(qc);
3235 /* another command may start at this point */
3242 * swap_buf_le16 - swap halves of 16-bit words in place
3243 * @buf: Buffer to swap
3244 * @buf_words: Number of 16-bit words in buffer.
3246 * Swap halves of 16-bit words if needed to convert from
3247 * little-endian byte order to native cpu byte order, or
3251 * Inherited from caller.
3253 void swap_buf_le16(u16 *buf, unsigned int buf_words)
3258 for (i = 0; i < buf_words; i++)
3259 buf[i] = le16_to_cpu(buf[i]);
3260 #endif /* __BIG_ENDIAN */
3264 * ata_mmio_data_xfer - Transfer data by MMIO
3265 * @ap: port to read/write
3267 * @buflen: buffer length
3268 * @write_data: read/write
3270 * Transfer data from/to the device data register by MMIO.
3273 * Inherited from caller.
3276 static void ata_mmio_data_xfer(struct ata_port *ap, unsigned char *buf,
3277 unsigned int buflen, int write_data)
3280 unsigned int words = buflen >> 1;
3281 u16 *buf16 = (u16 *) buf;
3282 void __iomem *mmio = (void __iomem *)ap->ioaddr.data_addr;
3284 /* Transfer multiple of 2 bytes */
3286 for (i = 0; i < words; i++)
3287 writew(le16_to_cpu(buf16[i]), mmio);
3289 for (i = 0; i < words; i++)
3290 buf16[i] = cpu_to_le16(readw(mmio));
3293 /* Transfer trailing 1 byte, if any. */
3294 if (unlikely(buflen & 0x01)) {
3295 u16 align_buf[1] = { 0 };
3296 unsigned char *trailing_buf = buf + buflen - 1;
3299 memcpy(align_buf, trailing_buf, 1);
3300 writew(le16_to_cpu(align_buf[0]), mmio);
3302 align_buf[0] = cpu_to_le16(readw(mmio));
3303 memcpy(trailing_buf, align_buf, 1);
3309 * ata_pio_data_xfer - Transfer data by PIO
3310 * @ap: port to read/write
3312 * @buflen: buffer length
3313 * @write_data: read/write
3315 * Transfer data from/to the device data register by PIO.
3318 * Inherited from caller.
3321 static void ata_pio_data_xfer(struct ata_port *ap, unsigned char *buf,
3322 unsigned int buflen, int write_data)
3324 unsigned int words = buflen >> 1;
3326 /* Transfer multiple of 2 bytes */
3328 outsw(ap->ioaddr.data_addr, buf, words);
3330 insw(ap->ioaddr.data_addr, buf, words);
3332 /* Transfer trailing 1 byte, if any. */
3333 if (unlikely(buflen & 0x01)) {
3334 u16 align_buf[1] = { 0 };
3335 unsigned char *trailing_buf = buf + buflen - 1;
3338 memcpy(align_buf, trailing_buf, 1);
3339 outw(le16_to_cpu(align_buf[0]), ap->ioaddr.data_addr);
3341 align_buf[0] = cpu_to_le16(inw(ap->ioaddr.data_addr));
3342 memcpy(trailing_buf, align_buf, 1);
3348 * ata_data_xfer - Transfer data from/to the data register.
3349 * @ap: port to read/write
3351 * @buflen: buffer length
3352 * @do_write: read/write
3354 * Transfer data from/to the device data register.
3357 * Inherited from caller.
3360 static void ata_data_xfer(struct ata_port *ap, unsigned char *buf,
3361 unsigned int buflen, int do_write)
3363 /* Make the crap hardware pay the costs not the good stuff */
3364 if (unlikely(ap->flags & ATA_FLAG_IRQ_MASK)) {
3365 unsigned long flags;
3366 local_irq_save(flags);
3367 if (ap->flags & ATA_FLAG_MMIO)
3368 ata_mmio_data_xfer(ap, buf, buflen, do_write);
3370 ata_pio_data_xfer(ap, buf, buflen, do_write);
3371 local_irq_restore(flags);
3373 if (ap->flags & ATA_FLAG_MMIO)
3374 ata_mmio_data_xfer(ap, buf, buflen, do_write);
3376 ata_pio_data_xfer(ap, buf, buflen, do_write);
3381 * ata_pio_sector - Transfer ATA_SECT_SIZE (512 bytes) of data.
3382 * @qc: Command on going
3384 * Transfer ATA_SECT_SIZE of data from/to the ATA device.
3387 * Inherited from caller.
3390 static void ata_pio_sector(struct ata_queued_cmd *qc)
3392 int do_write = (qc->tf.flags & ATA_TFLAG_WRITE);
3393 struct scatterlist *sg = qc->__sg;
3394 struct ata_port *ap = qc->ap;
3396 unsigned int offset;
3399 if (qc->cursect == (qc->nsect - 1))
3400 ap->hsm_task_state = HSM_ST_LAST;
3402 page = sg[qc->cursg].page;
3403 offset = sg[qc->cursg].offset + qc->cursg_ofs * ATA_SECT_SIZE;
3405 /* get the current page and offset */
3406 page = nth_page(page, (offset >> PAGE_SHIFT));
3407 offset %= PAGE_SIZE;
3409 DPRINTK("data %s\n", qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read");
3411 if (PageHighMem(page)) {
3412 unsigned long flags;
3414 local_irq_save(flags);
3415 buf = kmap_atomic(page, KM_IRQ0);
3417 /* do the actual data transfer */
3418 ata_data_xfer(ap, buf + offset, ATA_SECT_SIZE, do_write);
3420 kunmap_atomic(buf, KM_IRQ0);
3421 local_irq_restore(flags);
3423 buf = page_address(page);
3424 ata_data_xfer(ap, buf + offset, ATA_SECT_SIZE, do_write);
3430 if ((qc->cursg_ofs * ATA_SECT_SIZE) == (&sg[qc->cursg])->length) {
3437 * ata_pio_sectors - Transfer one or many 512-byte sectors.
3438 * @qc: Command on going
3440 * Transfer one or many ATA_SECT_SIZE of data from/to the
3441 * ATA device for the DRQ request.
3444 * Inherited from caller.
3447 static void ata_pio_sectors(struct ata_queued_cmd *qc)
3449 if (is_multi_taskfile(&qc->tf)) {
3450 /* READ/WRITE MULTIPLE */
3453 WARN_ON(qc->dev->multi_count == 0);
3455 nsect = min(qc->nsect - qc->cursect, qc->dev->multi_count);
3463 * atapi_send_cdb - Write CDB bytes to hardware
3464 * @ap: Port to which ATAPI device is attached.
3465 * @qc: Taskfile currently active
3467 * When device has indicated its readiness to accept
3468 * a CDB, this function is called. Send the CDB.
3474 static void atapi_send_cdb(struct ata_port *ap, struct ata_queued_cmd *qc)
3477 DPRINTK("send cdb\n");
3478 WARN_ON(qc->dev->cdb_len < 12);
3480 ata_data_xfer(ap, qc->cdb, qc->dev->cdb_len, 1);
3481 ata_altstatus(ap); /* flush */
3483 switch (qc->tf.protocol) {
3484 case ATA_PROT_ATAPI:
3485 ap->hsm_task_state = HSM_ST;
3487 case ATA_PROT_ATAPI_NODATA:
3488 ap->hsm_task_state = HSM_ST_LAST;
3490 case ATA_PROT_ATAPI_DMA:
3491 ap->hsm_task_state = HSM_ST_LAST;
3492 /* initiate bmdma */
3493 ap->ops->bmdma_start(qc);
3499 * ata_pio_first_block - Write first data block to hardware
3500 * @ap: Port to which ATA/ATAPI device is attached.
3502 * When device has indicated its readiness to accept
3503 * the data, this function sends out the CDB or
3504 * the first data block by PIO.
3506 * - If polling, ata_pio_task() handles the rest.
3507 * - Otherwise, interrupt handler takes over.
3510 * Kernel thread context (may sleep)
3513 * Zero if irq handler takes over
3514 * Non-zero if has next (polling).
3517 static int ata_pio_first_block(struct ata_port *ap)
3519 struct ata_queued_cmd *qc;
3521 unsigned long flags;
3524 qc = ata_qc_from_tag(ap, ap->active_tag);
3525 WARN_ON(qc == NULL);
3526 WARN_ON((qc->flags & ATA_QCFLAG_ACTIVE) == 0);
3528 /* if polling, we will stay in the work queue after sending the data.
3529 * otherwise, interrupt handler takes over after sending the data.
3531 has_next = (qc->tf.flags & ATA_TFLAG_POLLING);
3533 /* sleep-wait for BSY to clear */
3534 DPRINTK("busy wait\n");
3535 if (ata_busy_sleep(ap, ATA_TMOUT_DATAOUT_QUICK, ATA_TMOUT_DATAOUT)) {
3536 qc->err_mask |= AC_ERR_TIMEOUT;
3537 ap->hsm_task_state = HSM_ST_TMOUT;
3541 /* make sure DRQ is set */
3542 status = ata_chk_status(ap);
3543 if ((status & (ATA_BUSY | ATA_DRQ)) != ATA_DRQ) {
3544 /* device status error */
3545 qc->err_mask |= AC_ERR_HSM;
3546 ap->hsm_task_state = HSM_ST_ERR;
3550 /* Send the CDB (atapi) or the first data block (ata pio out).
3551 * During the state transition, interrupt handler shouldn't
3552 * be invoked before the data transfer is complete and
3553 * hsm_task_state is changed. Hence, the following locking.
3555 spin_lock_irqsave(&ap->host_set->lock, flags);
3557 if (qc->tf.protocol == ATA_PROT_PIO) {
3558 /* PIO data out protocol.
3559 * send first data block.
3562 /* ata_pio_sectors() might change the state to HSM_ST_LAST.
3563 * so, the state is changed here before ata_pio_sectors().
3565 ap->hsm_task_state = HSM_ST;
3566 ata_pio_sectors(qc);
3567 ata_altstatus(ap); /* flush */
3570 atapi_send_cdb(ap, qc);
3572 spin_unlock_irqrestore(&ap->host_set->lock, flags);
3574 /* if polling, ata_pio_task() handles the rest.
3575 * otherwise, interrupt handler takes over from here.
3580 return 1; /* has next */
3584 * __atapi_pio_bytes - Transfer data from/to the ATAPI device.
3585 * @qc: Command on going
3586 * @bytes: number of bytes
3588 * Transfer Transfer data from/to the ATAPI device.
3591 * Inherited from caller.
3595 static void __atapi_pio_bytes(struct ata_queued_cmd *qc, unsigned int bytes)
3597 int do_write = (qc->tf.flags & ATA_TFLAG_WRITE);
3598 struct scatterlist *sg = qc->__sg;
3599 struct ata_port *ap = qc->ap;
3602 unsigned int offset, count;
3604 if (qc->curbytes + bytes >= qc->nbytes)
3605 ap->hsm_task_state = HSM_ST_LAST;
3608 if (unlikely(qc->cursg >= qc->n_elem)) {
3610 * The end of qc->sg is reached and the device expects
3611 * more data to transfer. In order not to overrun qc->sg
3612 * and fulfill length specified in the byte count register,
3613 * - for read case, discard trailing data from the device
3614 * - for write case, padding zero data to the device
3616 u16 pad_buf[1] = { 0 };
3617 unsigned int words = bytes >> 1;
3620 if (words) /* warning if bytes > 1 */
3621 printk(KERN_WARNING "ata%u: %u bytes trailing data\n",
3624 for (i = 0; i < words; i++)
3625 ata_data_xfer(ap, (unsigned char*)pad_buf, 2, do_write);
3627 ap->hsm_task_state = HSM_ST_LAST;
3631 sg = &qc->__sg[qc->cursg];
3634 offset = sg->offset + qc->cursg_ofs;
3636 /* get the current page and offset */
3637 page = nth_page(page, (offset >> PAGE_SHIFT));
3638 offset %= PAGE_SIZE;
3640 /* don't overrun current sg */
3641 count = min(sg->length - qc->cursg_ofs, bytes);
3643 /* don't cross page boundaries */
3644 count = min(count, (unsigned int)PAGE_SIZE - offset);
3646 DPRINTK("data %s\n", qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read");
3648 if (PageHighMem(page)) {
3649 unsigned long flags;
3651 local_irq_save(flags);
3652 buf = kmap_atomic(page, KM_IRQ0);
3654 /* do the actual data transfer */
3655 ata_data_xfer(ap, buf + offset, count, do_write);
3657 kunmap_atomic(buf, KM_IRQ0);
3658 local_irq_restore(flags);
3660 buf = page_address(page);
3661 ata_data_xfer(ap, buf + offset, count, do_write);
3665 qc->curbytes += count;
3666 qc->cursg_ofs += count;
3668 if (qc->cursg_ofs == sg->length) {
3678 * atapi_pio_bytes - Transfer data from/to the ATAPI device.
3679 * @qc: Command on going
3681 * Transfer Transfer data from/to the ATAPI device.
3684 * Inherited from caller.
3687 static void atapi_pio_bytes(struct ata_queued_cmd *qc)
3689 struct ata_port *ap = qc->ap;
3690 struct ata_device *dev = qc->dev;
3691 unsigned int ireason, bc_lo, bc_hi, bytes;
3692 int i_write, do_write = (qc->tf.flags & ATA_TFLAG_WRITE) ? 1 : 0;
3694 ap->ops->tf_read(ap, &qc->tf);
3695 ireason = qc->tf.nsect;
3696 bc_lo = qc->tf.lbam;
3697 bc_hi = qc->tf.lbah;
3698 bytes = (bc_hi << 8) | bc_lo;
3700 /* shall be cleared to zero, indicating xfer of data */
3701 if (ireason & (1 << 0))
3704 /* make sure transfer direction matches expected */
3705 i_write = ((ireason & (1 << 1)) == 0) ? 1 : 0;
3706 if (do_write != i_write)
3709 VPRINTK("ata%u: xfering %d bytes\n", ap->id, bytes);
3711 __atapi_pio_bytes(qc, bytes);
3716 printk(KERN_INFO "ata%u: dev %u: ATAPI check failed\n",
3717 ap->id, dev->devno);
3718 qc->err_mask |= AC_ERR_HSM;
3719 ap->hsm_task_state = HSM_ST_ERR;
3723 * ata_pio_block - start PIO on a block
3724 * @ap: the target ata_port
3727 * None. (executing in kernel thread context)
3730 static void ata_pio_block(struct ata_port *ap)
3732 struct ata_queued_cmd *qc;
3736 * This is purely heuristic. This is a fast path.
3737 * Sometimes when we enter, BSY will be cleared in
3738 * a chk-status or two. If not, the drive is probably seeking
3739 * or something. Snooze for a couple msecs, then
3740 * chk-status again. If still busy, fall back to
3741 * HSM_ST_POLL state.
3743 status = ata_busy_wait(ap, ATA_BUSY, 5);
3744 if (status & ATA_BUSY) {
3746 status = ata_busy_wait(ap, ATA_BUSY, 10);
3747 if (status & ATA_BUSY) {
3748 ap->hsm_task_state = HSM_ST_POLL;
3749 ap->pio_task_timeout = jiffies + ATA_TMOUT_PIO;
3754 qc = ata_qc_from_tag(ap, ap->active_tag);
3755 WARN_ON(qc == NULL);
3758 if (status & (ATA_ERR | ATA_DF)) {
3759 qc->err_mask |= AC_ERR_DEV;
3760 ap->hsm_task_state = HSM_ST_ERR;
3764 /* transfer data if any */
3765 if (is_atapi_taskfile(&qc->tf)) {
3766 /* DRQ=0 means no more data to transfer */
3767 if ((status & ATA_DRQ) == 0) {
3768 ap->hsm_task_state = HSM_ST_LAST;
3772 atapi_pio_bytes(qc);
3774 /* handle BSY=0, DRQ=0 as error */
3775 if ((status & ATA_DRQ) == 0) {
3776 qc->err_mask |= AC_ERR_HSM;
3777 ap->hsm_task_state = HSM_ST_ERR;
3781 ata_pio_sectors(qc);
3784 ata_altstatus(ap); /* flush */
3787 static void ata_pio_error(struct ata_port *ap)
3789 struct ata_queued_cmd *qc;
3791 qc = ata_qc_from_tag(ap, ap->active_tag);
3792 WARN_ON(qc == NULL);
3794 if (qc->tf.command != ATA_CMD_PACKET)
3795 printk(KERN_WARNING "ata%u: PIO error\n", ap->id);
3797 /* make sure qc->err_mask is available to
3798 * know what's wrong and recover
3800 WARN_ON(qc->err_mask == 0);
3802 ap->hsm_task_state = HSM_ST_IDLE;
3804 ata_poll_qc_complete(qc);
3807 static void ata_pio_task(void *_data)
3809 struct ata_port *ap = _data;
3810 unsigned long timeout;
3817 switch (ap->hsm_task_state) {
3819 has_next = ata_pio_first_block(ap);
3827 has_next = ata_pio_complete(ap);
3831 case HSM_ST_LAST_POLL:
3832 timeout = ata_pio_poll(ap);
3846 ata_port_queue_task(ap, ata_pio_task, ap, timeout);
3852 * atapi_packet_task - Write CDB bytes to hardware
3853 * @_data: Port to which ATAPI device is attached.
3855 * When device has indicated its readiness to accept
3856 * a CDB, this function is called. Send the CDB.
3857 * If DMA is to be performed, exit immediately.
3858 * Otherwise, we are in polling mode, so poll
3859 * status under operation succeeds or fails.
3862 * Kernel thread context (may sleep)
3865 static void atapi_packet_task(void *_data)
3867 struct ata_port *ap = _data;
3868 struct ata_queued_cmd *qc;
3871 qc = ata_qc_from_tag(ap, ap->active_tag);
3872 WARN_ON(qc == NULL);
3873 WARN_ON(!(qc->flags & ATA_QCFLAG_ACTIVE));
3875 /* sleep-wait for BSY to clear */
3876 DPRINTK("busy wait\n");
3877 if (ata_busy_sleep(ap, ATA_TMOUT_CDB_QUICK, ATA_TMOUT_CDB)) {
3878 qc->err_mask |= AC_ERR_TIMEOUT;
3882 /* make sure DRQ is set */
3883 status = ata_chk_status(ap);
3884 if ((status & (ATA_BUSY | ATA_DRQ)) != ATA_DRQ) {
3885 qc->err_mask |= AC_ERR_HSM;
3890 DPRINTK("send cdb\n");
3891 WARN_ON(qc->dev->cdb_len < 12);
3893 if (qc->tf.protocol == ATA_PROT_ATAPI_DMA ||
3894 qc->tf.protocol == ATA_PROT_ATAPI_NODATA) {
3895 unsigned long flags;
3897 /* Once we're done issuing command and kicking bmdma,
3898 * irq handler takes over. To not lose irq, we need
3899 * to clear NOINTR flag before sending cdb, but
3900 * interrupt handler shouldn't be invoked before we're
3901 * finished. Hence, the following locking.
3903 spin_lock_irqsave(&ap->host_set->lock, flags);
3905 /* ap->flags &= ~ATA_FLAG_NOINTR; */
3906 ata_data_xfer(ap, qc->cdb, qc->dev->cdb_len, 1);
3907 if (qc->tf.protocol == ATA_PROT_ATAPI_DMA)
3908 ap->ops->bmdma_start(qc); /* initiate bmdma */
3909 spin_unlock_irqrestore(&ap->host_set->lock, flags);
3911 ata_data_xfer(ap, qc->cdb, qc->dev->cdb_len, 1);
3913 /* PIO commands are handled by polling */
3914 ap->hsm_task_state = HSM_ST;
3915 ata_port_queue_task(ap, ata_pio_task, ap, 0);
3921 ata_poll_qc_complete(qc);
3925 * ata_qc_timeout - Handle timeout of queued command
3926 * @qc: Command that timed out
3928 * Some part of the kernel (currently, only the SCSI layer)
3929 * has noticed that the active command on port @ap has not
3930 * completed after a specified length of time. Handle this
3931 * condition by disabling DMA (if necessary) and completing
3932 * transactions, with error if necessary.
3934 * This also handles the case of the "lost interrupt", where
3935 * for some reason (possibly hardware bug, possibly driver bug)
3936 * an interrupt was not delivered to the driver, even though the
3937 * transaction completed successfully.
3940 * Inherited from SCSI layer (none, can sleep)
3943 static void ata_qc_timeout(struct ata_queued_cmd *qc)
3945 struct ata_port *ap = qc->ap;
3946 struct ata_host_set *host_set = ap->host_set;
3947 u8 host_stat = 0, drv_stat;
3948 unsigned long flags;
3952 ap->hsm_task_state = HSM_ST_IDLE;
3954 spin_lock_irqsave(&host_set->lock, flags);
3956 switch (qc->tf.protocol) {
3959 case ATA_PROT_ATAPI_DMA:
3960 host_stat = ap->ops->bmdma_status(ap);
3962 /* before we do anything else, clear DMA-Start bit */
3963 ap->ops->bmdma_stop(qc);
3969 drv_stat = ata_chk_status(ap);
3971 /* ack bmdma irq events */
3972 ap->ops->irq_clear(ap);
3974 printk(KERN_ERR "ata%u: command 0x%x timeout, stat 0x%x host_stat 0x%x\n",
3975 ap->id, qc->tf.command, drv_stat, host_stat);
3977 ap->hsm_task_state = HSM_ST_IDLE;
3979 /* complete taskfile transaction */
3980 qc->err_mask |= AC_ERR_TIMEOUT;
3984 spin_unlock_irqrestore(&host_set->lock, flags);
3986 ata_eh_qc_complete(qc);
3992 * ata_eng_timeout - Handle timeout of queued command
3993 * @ap: Port on which timed-out command is active
3995 * Some part of the kernel (currently, only the SCSI layer)
3996 * has noticed that the active command on port @ap has not
3997 * completed after a specified length of time. Handle this
3998 * condition by disabling DMA (if necessary) and completing
3999 * transactions, with error if necessary.
4001 * This also handles the case of the "lost interrupt", where
4002 * for some reason (possibly hardware bug, possibly driver bug)
4003 * an interrupt was not delivered to the driver, even though the
4004 * transaction completed successfully.
4007 * Inherited from SCSI layer (none, can sleep)
4010 void ata_eng_timeout(struct ata_port *ap)
4014 ata_qc_timeout(ata_qc_from_tag(ap, ap->active_tag));
4020 * ata_qc_new - Request an available ATA command, for queueing
4021 * @ap: Port associated with device @dev
4022 * @dev: Device from whom we request an available command structure
4028 static struct ata_queued_cmd *ata_qc_new(struct ata_port *ap)
4030 struct ata_queued_cmd *qc = NULL;
4033 for (i = 0; i < ATA_MAX_QUEUE; i++)
4034 if (!test_and_set_bit(i, &ap->qactive)) {
4035 qc = ata_qc_from_tag(ap, i);
4046 * ata_qc_new_init - Request an available ATA command, and initialize it
4047 * @ap: Port associated with device @dev
4048 * @dev: Device from whom we request an available command structure
4054 struct ata_queued_cmd *ata_qc_new_init(struct ata_port *ap,
4055 struct ata_device *dev)
4057 struct ata_queued_cmd *qc;
4059 qc = ata_qc_new(ap);
4072 * ata_qc_free - free unused ata_queued_cmd
4073 * @qc: Command to complete
4075 * Designed to free unused ata_queued_cmd object
4076 * in case something prevents using it.
4079 * spin_lock_irqsave(host_set lock)
4081 void ata_qc_free(struct ata_queued_cmd *qc)
4083 struct ata_port *ap = qc->ap;
4086 WARN_ON(qc == NULL); /* ata_qc_from_tag _might_ return NULL */
4090 if (likely(ata_tag_valid(tag))) {
4091 if (tag == ap->active_tag)
4092 ap->active_tag = ATA_TAG_POISON;
4093 qc->tag = ATA_TAG_POISON;
4094 clear_bit(tag, &ap->qactive);
4098 void __ata_qc_complete(struct ata_queued_cmd *qc)
4100 WARN_ON(qc == NULL); /* ata_qc_from_tag _might_ return NULL */
4101 WARN_ON(!(qc->flags & ATA_QCFLAG_ACTIVE));
4103 if (likely(qc->flags & ATA_QCFLAG_DMAMAP))
4106 /* atapi: mark qc as inactive to prevent the interrupt handler
4107 * from completing the command twice later, before the error handler
4108 * is called. (when rc != 0 and atapi request sense is needed)
4110 qc->flags &= ~ATA_QCFLAG_ACTIVE;
4112 /* call completion callback */
4113 qc->complete_fn(qc);
4116 static inline int ata_should_dma_map(struct ata_queued_cmd *qc)
4118 struct ata_port *ap = qc->ap;
4120 switch (qc->tf.protocol) {
4122 case ATA_PROT_ATAPI_DMA:
4125 case ATA_PROT_ATAPI:
4127 if (ap->flags & ATA_FLAG_PIO_DMA)
4140 * ata_qc_issue - issue taskfile to device
4141 * @qc: command to issue to device
4143 * Prepare an ATA command to submission to device.
4144 * This includes mapping the data into a DMA-able
4145 * area, filling in the S/G table, and finally
4146 * writing the taskfile to hardware, starting the command.
4149 * spin_lock_irqsave(host_set lock)
4152 * Zero on success, AC_ERR_* mask on failure
4155 unsigned int ata_qc_issue(struct ata_queued_cmd *qc)
4157 struct ata_port *ap = qc->ap;
4159 if (ata_should_dma_map(qc)) {
4160 if (qc->flags & ATA_QCFLAG_SG) {
4161 if (ata_sg_setup(qc))
4163 } else if (qc->flags & ATA_QCFLAG_SINGLE) {
4164 if (ata_sg_setup_one(qc))
4168 qc->flags &= ~ATA_QCFLAG_DMAMAP;
4171 ap->ops->qc_prep(qc);
4173 qc->ap->active_tag = qc->tag;
4174 qc->flags |= ATA_QCFLAG_ACTIVE;
4176 return ap->ops->qc_issue(qc);
4179 qc->flags &= ~ATA_QCFLAG_DMAMAP;
4180 return AC_ERR_SYSTEM;
4185 * ata_qc_issue_prot - issue taskfile to device in proto-dependent manner
4186 * @qc: command to issue to device
4188 * Using various libata functions and hooks, this function
4189 * starts an ATA command. ATA commands are grouped into
4190 * classes called "protocols", and issuing each type of protocol
4191 * is slightly different.
4193 * May be used as the qc_issue() entry in ata_port_operations.
4196 * spin_lock_irqsave(host_set lock)
4199 * Zero on success, AC_ERR_* mask on failure
4202 unsigned int ata_qc_issue_prot(struct ata_queued_cmd *qc)
4204 struct ata_port *ap = qc->ap;
4206 /* Use polling pio if the LLD doesn't handle
4207 * interrupt driven pio and atapi CDB interrupt.
4209 if (ap->flags & ATA_FLAG_PIO_POLLING) {
4210 switch (qc->tf.protocol) {
4212 case ATA_PROT_ATAPI:
4213 case ATA_PROT_ATAPI_NODATA:
4214 qc->tf.flags |= ATA_TFLAG_POLLING;
4216 case ATA_PROT_ATAPI_DMA:
4217 if (qc->dev->flags & ATA_DFLAG_CDB_INTR)
4225 /* select the device */
4226 ata_dev_select(ap, qc->dev->devno, 1, 0);
4228 /* start the command */
4229 switch (qc->tf.protocol) {
4230 case ATA_PROT_NODATA:
4231 if (qc->tf.flags & ATA_TFLAG_POLLING)
4232 ata_qc_set_polling(qc);
4234 ata_tf_to_host(ap, &qc->tf);
4235 ap->hsm_task_state = HSM_ST_LAST;
4237 if (qc->tf.flags & ATA_TFLAG_POLLING)
4238 ata_port_queue_task(ap, ata_pio_task, ap, 0);
4243 WARN_ON(qc->tf.flags & ATA_TFLAG_POLLING);
4245 ap->ops->tf_load(ap, &qc->tf); /* load tf registers */
4246 ap->ops->bmdma_setup(qc); /* set up bmdma */
4247 ap->ops->bmdma_start(qc); /* initiate bmdma */
4248 ap->hsm_task_state = HSM_ST_LAST;
4252 if (qc->tf.flags & ATA_TFLAG_POLLING)
4253 ata_qc_set_polling(qc);
4255 ata_tf_to_host(ap, &qc->tf);
4257 if (qc->tf.flags & ATA_TFLAG_WRITE) {
4258 /* PIO data out protocol */
4259 ap->hsm_task_state = HSM_ST_FIRST;
4260 ata_port_queue_task(ap, ata_pio_task, ap, 0);
4262 /* always send first data block using
4263 * the ata_pio_task() codepath.
4266 /* PIO data in protocol */
4267 ap->hsm_task_state = HSM_ST;
4269 if (qc->tf.flags & ATA_TFLAG_POLLING)
4270 ata_port_queue_task(ap, ata_pio_task, ap, 0);
4272 /* if polling, ata_pio_task() handles the rest.
4273 * otherwise, interrupt handler takes over from here.
4279 case ATA_PROT_ATAPI:
4280 case ATA_PROT_ATAPI_NODATA:
4281 if (qc->tf.flags & ATA_TFLAG_POLLING)
4282 ata_qc_set_polling(qc);
4284 ata_tf_to_host(ap, &qc->tf);
4286 ap->hsm_task_state = HSM_ST_FIRST;
4288 /* send cdb by polling if no cdb interrupt */
4289 if ((!(qc->dev->flags & ATA_DFLAG_CDB_INTR)) ||
4290 (qc->tf.flags & ATA_TFLAG_POLLING))
4291 ata_port_queue_task(ap, atapi_packet_task, ap, 0);
4294 case ATA_PROT_ATAPI_DMA:
4295 WARN_ON(qc->tf.flags & ATA_TFLAG_POLLING);
4297 ap->ops->tf_load(ap, &qc->tf); /* load tf registers */
4298 ap->ops->bmdma_setup(qc); /* set up bmdma */
4299 ap->hsm_task_state = HSM_ST_FIRST;
4301 /* send cdb by polling if no cdb interrupt */
4302 if (!(qc->dev->flags & ATA_DFLAG_CDB_INTR))
4303 ata_port_queue_task(ap, atapi_packet_task, ap, 0);
4308 return AC_ERR_SYSTEM;
4315 * ata_host_intr - Handle host interrupt for given (port, task)
4316 * @ap: Port on which interrupt arrived (possibly...)
4317 * @qc: Taskfile currently active in engine
4319 * Handle host interrupt for given queued command. Currently,
4320 * only DMA interrupts are handled. All other commands are
4321 * handled via polling with interrupts disabled (nIEN bit).
4324 * spin_lock_irqsave(host_set lock)
4327 * One if interrupt was handled, zero if not (shared irq).
4330 inline unsigned int ata_host_intr (struct ata_port *ap,
4331 struct ata_queued_cmd *qc)
4333 u8 status, host_stat = 0;
4335 VPRINTK("ata%u: protocol %d task_state %d\n",
4336 ap->id, qc->tf.protocol, ap->hsm_task_state);
4338 /* Check whether we are expecting interrupt in this state */
4339 switch (ap->hsm_task_state) {
4341 /* Check the ATA_DFLAG_CDB_INTR flag is enough here.
4342 * The flag was turned on only for atapi devices.
4343 * No need to check is_atapi_taskfile(&qc->tf) again.
4345 if (!(qc->dev->flags & ATA_DFLAG_CDB_INTR))
4349 if (qc->tf.protocol == ATA_PROT_DMA ||
4350 qc->tf.protocol == ATA_PROT_ATAPI_DMA) {
4351 /* check status of DMA engine */
4352 host_stat = ap->ops->bmdma_status(ap);
4353 VPRINTK("ata%u: host_stat 0x%X\n", ap->id, host_stat);
4355 /* if it's not our irq... */
4356 if (!(host_stat & ATA_DMA_INTR))
4359 /* before we do anything else, clear DMA-Start bit */
4360 ap->ops->bmdma_stop(qc);
4362 if (unlikely(host_stat & ATA_DMA_ERR)) {
4363 /* error when transfering data to/from memory */
4364 qc->err_mask |= AC_ERR_HOST_BUS;
4365 ap->hsm_task_state = HSM_ST_ERR;
4375 /* check altstatus */
4376 status = ata_altstatus(ap);
4377 if (status & ATA_BUSY)
4380 /* check main status, clearing INTRQ */
4381 status = ata_chk_status(ap);
4382 if (unlikely(status & ATA_BUSY))
4385 DPRINTK("ata%u: protocol %d task_state %d (dev_stat 0x%X)\n",
4386 ap->id, qc->tf.protocol, ap->hsm_task_state, status);
4388 /* ack bmdma irq events */
4389 ap->ops->irq_clear(ap);
4392 if (unlikely(status & (ATA_ERR | ATA_DF))) {
4393 qc->err_mask |= AC_ERR_DEV;
4394 ap->hsm_task_state = HSM_ST_ERR;
4398 switch (ap->hsm_task_state) {
4400 /* Some pre-ATAPI-4 devices assert INTRQ
4401 * at this state when ready to receive CDB.
4404 /* check device status */
4405 if (unlikely((status & (ATA_BUSY | ATA_DRQ)) != ATA_DRQ)) {
4406 /* Wrong status. Let EH handle this */
4407 qc->err_mask |= AC_ERR_HSM;
4408 ap->hsm_task_state = HSM_ST_ERR;
4412 atapi_send_cdb(ap, qc);
4417 /* complete command or read/write the data register */
4418 if (qc->tf.protocol == ATA_PROT_ATAPI) {
4419 /* ATAPI PIO protocol */
4420 if ((status & ATA_DRQ) == 0) {
4421 /* no more data to transfer */
4422 ap->hsm_task_state = HSM_ST_LAST;
4426 atapi_pio_bytes(qc);
4428 if (unlikely(ap->hsm_task_state == HSM_ST_ERR))
4429 /* bad ireason reported by device */
4433 /* ATA PIO protocol */
4434 if (unlikely((status & ATA_DRQ) == 0)) {
4435 /* handle BSY=0, DRQ=0 as error */
4436 qc->err_mask |= AC_ERR_HSM;
4437 ap->hsm_task_state = HSM_ST_ERR;
4441 ata_pio_sectors(qc);
4443 if (ap->hsm_task_state == HSM_ST_LAST &&
4444 (!(qc->tf.flags & ATA_TFLAG_WRITE))) {
4447 status = ata_chk_status(ap);
4452 ata_altstatus(ap); /* flush */
4456 if (unlikely(status & ATA_DRQ)) {
4457 /* handle DRQ=1 as error */
4458 qc->err_mask |= AC_ERR_HSM;
4459 ap->hsm_task_state = HSM_ST_ERR;
4463 /* no more data to transfer */
4464 DPRINTK("ata%u: command complete, drv_stat 0x%x\n",
4467 ap->hsm_task_state = HSM_ST_IDLE;
4469 /* complete taskfile transaction */
4470 qc->err_mask |= ac_err_mask(status);
4471 ata_qc_complete(qc);
4475 if (qc->tf.command != ATA_CMD_PACKET)
4476 printk(KERN_ERR "ata%u: command error, drv_stat 0x%x host_stat 0x%x\n",
4477 ap->id, status, host_stat);
4479 /* make sure qc->err_mask is available to
4480 * know what's wrong and recover
4482 WARN_ON(qc->err_mask == 0);
4484 ap->hsm_task_state = HSM_ST_IDLE;
4485 ata_qc_complete(qc);
4491 return 1; /* irq handled */
4494 ap->stats.idle_irq++;
4497 if ((ap->stats.idle_irq % 1000) == 0) {
4498 ata_irq_ack(ap, 0); /* debug trap */
4499 printk(KERN_WARNING "ata%d: irq trap\n", ap->id);
4503 return 0; /* irq not handled */
4507 * ata_interrupt - Default ATA host interrupt handler
4508 * @irq: irq line (unused)
4509 * @dev_instance: pointer to our ata_host_set information structure
4512 * Default interrupt handler for PCI IDE devices. Calls
4513 * ata_host_intr() for each port that is not disabled.
4516 * Obtains host_set lock during operation.
4519 * IRQ_NONE or IRQ_HANDLED.
4522 irqreturn_t ata_interrupt (int irq, void *dev_instance, struct pt_regs *regs)
4524 struct ata_host_set *host_set = dev_instance;
4526 unsigned int handled = 0;
4527 unsigned long flags;
4529 /* TODO: make _irqsave conditional on x86 PCI IDE legacy mode */
4530 spin_lock_irqsave(&host_set->lock, flags);
4532 for (i = 0; i < host_set->n_ports; i++) {
4533 struct ata_port *ap;
4535 ap = host_set->ports[i];
4537 !(ap->flags & ATA_FLAG_PORT_DISABLED)) {
4538 struct ata_queued_cmd *qc;
4540 qc = ata_qc_from_tag(ap, ap->active_tag);
4541 if (qc && (!(qc->tf.flags & ATA_TFLAG_POLLING)) &&
4542 (qc->flags & ATA_QCFLAG_ACTIVE))
4543 handled |= ata_host_intr(ap, qc);
4547 spin_unlock_irqrestore(&host_set->lock, flags);
4549 return IRQ_RETVAL(handled);
4554 * Execute a 'simple' command, that only consists of the opcode 'cmd' itself,
4555 * without filling any other registers
4557 static int ata_do_simple_cmd(struct ata_port *ap, struct ata_device *dev,
4560 struct ata_taskfile tf;
4563 ata_tf_init(ap, &tf, dev->devno);
4566 tf.flags |= ATA_TFLAG_DEVICE;
4567 tf.protocol = ATA_PROT_NODATA;
4569 err = ata_exec_internal(ap, dev, &tf, DMA_NONE, NULL, 0);
4571 printk(KERN_ERR "%s: ata command failed: %d\n",
4577 static int ata_flush_cache(struct ata_port *ap, struct ata_device *dev)
4581 if (!ata_try_flush_cache(dev))
4584 if (ata_id_has_flush_ext(dev->id))
4585 cmd = ATA_CMD_FLUSH_EXT;
4587 cmd = ATA_CMD_FLUSH;
4589 return ata_do_simple_cmd(ap, dev, cmd);
4592 static int ata_standby_drive(struct ata_port *ap, struct ata_device *dev)
4594 return ata_do_simple_cmd(ap, dev, ATA_CMD_STANDBYNOW1);
4597 static int ata_start_drive(struct ata_port *ap, struct ata_device *dev)
4599 return ata_do_simple_cmd(ap, dev, ATA_CMD_IDLEIMMEDIATE);
4603 * ata_device_resume - wakeup a previously suspended devices
4604 * @ap: port the device is connected to
4605 * @dev: the device to resume
4607 * Kick the drive back into action, by sending it an idle immediate
4608 * command and making sure its transfer mode matches between drive
4612 int ata_device_resume(struct ata_port *ap, struct ata_device *dev)
4614 if (ap->flags & ATA_FLAG_SUSPENDED) {
4615 ap->flags &= ~ATA_FLAG_SUSPENDED;
4618 if (!ata_dev_present(dev))
4620 if (dev->class == ATA_DEV_ATA)
4621 ata_start_drive(ap, dev);
4627 * ata_device_suspend - prepare a device for suspend
4628 * @ap: port the device is connected to
4629 * @dev: the device to suspend
4631 * Flush the cache on the drive, if appropriate, then issue a
4632 * standbynow command.
4634 int ata_device_suspend(struct ata_port *ap, struct ata_device *dev, pm_message_t state)
4636 if (!ata_dev_present(dev))
4638 if (dev->class == ATA_DEV_ATA)
4639 ata_flush_cache(ap, dev);
4641 if (state.event != PM_EVENT_FREEZE)
4642 ata_standby_drive(ap, dev);
4643 ap->flags |= ATA_FLAG_SUSPENDED;
4648 * ata_port_start - Set port up for dma.
4649 * @ap: Port to initialize
4651 * Called just after data structures for each port are
4652 * initialized. Allocates space for PRD table.
4654 * May be used as the port_start() entry in ata_port_operations.
4657 * Inherited from caller.
4660 int ata_port_start (struct ata_port *ap)
4662 struct device *dev = ap->dev;
4665 ap->prd = dma_alloc_coherent(dev, ATA_PRD_TBL_SZ, &ap->prd_dma, GFP_KERNEL);
4669 rc = ata_pad_alloc(ap, dev);
4671 dma_free_coherent(dev, ATA_PRD_TBL_SZ, ap->prd, ap->prd_dma);
4675 DPRINTK("prd alloc, virt %p, dma %llx\n", ap->prd, (unsigned long long) ap->prd_dma);
4682 * ata_port_stop - Undo ata_port_start()
4683 * @ap: Port to shut down
4685 * Frees the PRD table.
4687 * May be used as the port_stop() entry in ata_port_operations.
4690 * Inherited from caller.
4693 void ata_port_stop (struct ata_port *ap)
4695 struct device *dev = ap->dev;
4697 dma_free_coherent(dev, ATA_PRD_TBL_SZ, ap->prd, ap->prd_dma);
4698 ata_pad_free(ap, dev);
4701 void ata_host_stop (struct ata_host_set *host_set)
4703 if (host_set->mmio_base)
4704 iounmap(host_set->mmio_base);
4709 * ata_host_remove - Unregister SCSI host structure with upper layers
4710 * @ap: Port to unregister
4711 * @do_unregister: 1 if we fully unregister, 0 to just stop the port
4714 * Inherited from caller.
4717 static void ata_host_remove(struct ata_port *ap, unsigned int do_unregister)
4719 struct Scsi_Host *sh = ap->host;
4724 scsi_remove_host(sh);
4726 ap->ops->port_stop(ap);
4730 * ata_host_init - Initialize an ata_port structure
4731 * @ap: Structure to initialize
4732 * @host: associated SCSI mid-layer structure
4733 * @host_set: Collection of hosts to which @ap belongs
4734 * @ent: Probe information provided by low-level driver
4735 * @port_no: Port number associated with this ata_port
4737 * Initialize a new ata_port structure, and its associated
4741 * Inherited from caller.
4744 static void ata_host_init(struct ata_port *ap, struct Scsi_Host *host,
4745 struct ata_host_set *host_set,
4746 const struct ata_probe_ent *ent, unsigned int port_no)
4752 host->max_channel = 1;
4753 host->unique_id = ata_unique_id++;
4754 host->max_cmd_len = 12;
4756 ap->flags = ATA_FLAG_PORT_DISABLED;
4757 ap->id = host->unique_id;
4759 ap->ctl = ATA_DEVCTL_OBS;
4760 ap->host_set = host_set;
4762 ap->port_no = port_no;
4764 ent->legacy_mode ? ent->hard_port_no : port_no;
4765 ap->pio_mask = ent->pio_mask;
4766 ap->mwdma_mask = ent->mwdma_mask;
4767 ap->udma_mask = ent->udma_mask;
4768 ap->flags |= ent->host_flags;
4769 ap->ops = ent->port_ops;
4770 ap->cbl = ATA_CBL_NONE;
4771 ap->active_tag = ATA_TAG_POISON;
4772 ap->last_ctl = 0xFF;
4774 INIT_WORK(&ap->port_task, NULL, NULL);
4775 INIT_LIST_HEAD(&ap->eh_done_q);
4777 for (i = 0; i < ATA_MAX_DEVICES; i++) {
4778 struct ata_device *dev = &ap->device[i];
4780 dev->pio_mask = UINT_MAX;
4781 dev->mwdma_mask = UINT_MAX;
4782 dev->udma_mask = UINT_MAX;
4786 ap->stats.unhandled_irq = 1;
4787 ap->stats.idle_irq = 1;
4790 memcpy(&ap->ioaddr, &ent->port[port_no], sizeof(struct ata_ioports));
4794 * ata_host_add - Attach low-level ATA driver to system
4795 * @ent: Information provided by low-level driver
4796 * @host_set: Collections of ports to which we add
4797 * @port_no: Port number associated with this host
4799 * Attach low-level ATA driver to system.
4802 * PCI/etc. bus probe sem.
4805 * New ata_port on success, for NULL on error.
4808 static struct ata_port * ata_host_add(const struct ata_probe_ent *ent,
4809 struct ata_host_set *host_set,
4810 unsigned int port_no)
4812 struct Scsi_Host *host;
4813 struct ata_port *ap;
4818 if (!ent->port_ops->probe_reset &&
4819 !(ent->host_flags & (ATA_FLAG_SATA_RESET | ATA_FLAG_SRST))) {
4820 printk(KERN_ERR "ata%u: no reset mechanism available\n",
4825 host = scsi_host_alloc(ent->sht, sizeof(struct ata_port));
4829 host->transportt = &ata_scsi_transport_template;
4831 ap = (struct ata_port *) &host->hostdata[0];
4833 ata_host_init(ap, host, host_set, ent, port_no);
4835 rc = ap->ops->port_start(ap);
4842 scsi_host_put(host);
4847 * ata_device_add - Register hardware device with ATA and SCSI layers
4848 * @ent: Probe information describing hardware device to be registered
4850 * This function processes the information provided in the probe
4851 * information struct @ent, allocates the necessary ATA and SCSI
4852 * host information structures, initializes them, and registers
4853 * everything with requisite kernel subsystems.
4855 * This function requests irqs, probes the ATA bus, and probes
4859 * PCI/etc. bus probe sem.
4862 * Number of ports registered. Zero on error (no ports registered).
4865 int ata_device_add(const struct ata_probe_ent *ent)
4867 unsigned int count = 0, i;
4868 struct device *dev = ent->dev;
4869 struct ata_host_set *host_set;
4872 /* alloc a container for our list of ATA ports (buses) */
4873 host_set = kzalloc(sizeof(struct ata_host_set) +
4874 (ent->n_ports * sizeof(void *)), GFP_KERNEL);
4877 spin_lock_init(&host_set->lock);
4879 host_set->dev = dev;
4880 host_set->n_ports = ent->n_ports;
4881 host_set->irq = ent->irq;
4882 host_set->mmio_base = ent->mmio_base;
4883 host_set->private_data = ent->private_data;
4884 host_set->ops = ent->port_ops;
4886 /* register each port bound to this device */
4887 for (i = 0; i < ent->n_ports; i++) {
4888 struct ata_port *ap;
4889 unsigned long xfer_mode_mask;
4891 ap = ata_host_add(ent, host_set, i);
4895 host_set->ports[i] = ap;
4896 xfer_mode_mask =(ap->udma_mask << ATA_SHIFT_UDMA) |
4897 (ap->mwdma_mask << ATA_SHIFT_MWDMA) |
4898 (ap->pio_mask << ATA_SHIFT_PIO);
4900 /* print per-port info to dmesg */
4901 printk(KERN_INFO "ata%u: %cATA max %s cmd 0x%lX ctl 0x%lX "
4902 "bmdma 0x%lX irq %lu\n",
4904 ap->flags & ATA_FLAG_SATA ? 'S' : 'P',
4905 ata_mode_string(xfer_mode_mask),
4906 ap->ioaddr.cmd_addr,
4907 ap->ioaddr.ctl_addr,
4908 ap->ioaddr.bmdma_addr,
4912 host_set->ops->irq_clear(ap);
4919 /* obtain irq, that is shared between channels */
4920 if (request_irq(ent->irq, ent->port_ops->irq_handler, ent->irq_flags,
4921 DRV_NAME, host_set))
4924 /* perform each probe synchronously */
4925 DPRINTK("probe begin\n");
4926 for (i = 0; i < count; i++) {
4927 struct ata_port *ap;
4930 ap = host_set->ports[i];
4932 DPRINTK("ata%u: bus probe begin\n", ap->id);
4933 rc = ata_bus_probe(ap);
4934 DPRINTK("ata%u: bus probe end\n", ap->id);
4937 /* FIXME: do something useful here?
4938 * Current libata behavior will
4939 * tear down everything when
4940 * the module is removed
4941 * or the h/w is unplugged.
4945 rc = scsi_add_host(ap->host, dev);
4947 printk(KERN_ERR "ata%u: scsi_add_host failed\n",
4949 /* FIXME: do something useful here */
4950 /* FIXME: handle unconditional calls to
4951 * scsi_scan_host and ata_host_remove, below,
4957 /* probes are done, now scan each port's disk(s) */
4958 DPRINTK("host probe begin\n");
4959 for (i = 0; i < count; i++) {
4960 struct ata_port *ap = host_set->ports[i];
4962 ata_scsi_scan_host(ap);
4965 dev_set_drvdata(dev, host_set);
4967 VPRINTK("EXIT, returning %u\n", ent->n_ports);
4968 return ent->n_ports; /* success */
4971 for (i = 0; i < count; i++) {
4972 ata_host_remove(host_set->ports[i], 1);
4973 scsi_host_put(host_set->ports[i]->host);
4977 VPRINTK("EXIT, returning 0\n");
4982 * ata_host_set_remove - PCI layer callback for device removal
4983 * @host_set: ATA host set that was removed
4985 * Unregister all objects associated with this host set. Free those
4989 * Inherited from calling layer (may sleep).
4992 void ata_host_set_remove(struct ata_host_set *host_set)
4994 struct ata_port *ap;
4997 for (i = 0; i < host_set->n_ports; i++) {
4998 ap = host_set->ports[i];
4999 scsi_remove_host(ap->host);
5002 free_irq(host_set->irq, host_set);
5004 for (i = 0; i < host_set->n_ports; i++) {
5005 ap = host_set->ports[i];
5007 ata_scsi_release(ap->host);
5009 if ((ap->flags & ATA_FLAG_NO_LEGACY) == 0) {
5010 struct ata_ioports *ioaddr = &ap->ioaddr;
5012 if (ioaddr->cmd_addr == 0x1f0)
5013 release_region(0x1f0, 8);
5014 else if (ioaddr->cmd_addr == 0x170)
5015 release_region(0x170, 8);
5018 scsi_host_put(ap->host);
5021 if (host_set->ops->host_stop)
5022 host_set->ops->host_stop(host_set);
5028 * ata_scsi_release - SCSI layer callback hook for host unload
5029 * @host: libata host to be unloaded
5031 * Performs all duties necessary to shut down a libata port...
5032 * Kill port kthread, disable port, and release resources.
5035 * Inherited from SCSI layer.
5041 int ata_scsi_release(struct Scsi_Host *host)
5043 struct ata_port *ap = (struct ata_port *) &host->hostdata[0];
5048 ap->ops->port_disable(ap);
5049 ata_host_remove(ap, 0);
5050 for (i = 0; i < ATA_MAX_DEVICES; i++)
5051 kfree(ap->device[i].id);
5058 * ata_std_ports - initialize ioaddr with standard port offsets.
5059 * @ioaddr: IO address structure to be initialized
5061 * Utility function which initializes data_addr, error_addr,
5062 * feature_addr, nsect_addr, lbal_addr, lbam_addr, lbah_addr,
5063 * device_addr, status_addr, and command_addr to standard offsets
5064 * relative to cmd_addr.
5066 * Does not set ctl_addr, altstatus_addr, bmdma_addr, or scr_addr.
5069 void ata_std_ports(struct ata_ioports *ioaddr)
5071 ioaddr->data_addr = ioaddr->cmd_addr + ATA_REG_DATA;
5072 ioaddr->error_addr = ioaddr->cmd_addr + ATA_REG_ERR;
5073 ioaddr->feature_addr = ioaddr->cmd_addr + ATA_REG_FEATURE;
5074 ioaddr->nsect_addr = ioaddr->cmd_addr + ATA_REG_NSECT;
5075 ioaddr->lbal_addr = ioaddr->cmd_addr + ATA_REG_LBAL;
5076 ioaddr->lbam_addr = ioaddr->cmd_addr + ATA_REG_LBAM;
5077 ioaddr->lbah_addr = ioaddr->cmd_addr + ATA_REG_LBAH;
5078 ioaddr->device_addr = ioaddr->cmd_addr + ATA_REG_DEVICE;
5079 ioaddr->status_addr = ioaddr->cmd_addr + ATA_REG_STATUS;
5080 ioaddr->command_addr = ioaddr->cmd_addr + ATA_REG_CMD;
5086 void ata_pci_host_stop (struct ata_host_set *host_set)
5088 struct pci_dev *pdev = to_pci_dev(host_set->dev);
5090 pci_iounmap(pdev, host_set->mmio_base);
5094 * ata_pci_remove_one - PCI layer callback for device removal
5095 * @pdev: PCI device that was removed
5097 * PCI layer indicates to libata via this hook that
5098 * hot-unplug or module unload event has occurred.
5099 * Handle this by unregistering all objects associated
5100 * with this PCI device. Free those objects. Then finally
5101 * release PCI resources and disable device.
5104 * Inherited from PCI layer (may sleep).
5107 void ata_pci_remove_one (struct pci_dev *pdev)
5109 struct device *dev = pci_dev_to_dev(pdev);
5110 struct ata_host_set *host_set = dev_get_drvdata(dev);
5112 ata_host_set_remove(host_set);
5113 pci_release_regions(pdev);
5114 pci_disable_device(pdev);
5115 dev_set_drvdata(dev, NULL);
5118 /* move to PCI subsystem */
5119 int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits)
5121 unsigned long tmp = 0;
5123 switch (bits->width) {
5126 pci_read_config_byte(pdev, bits->reg, &tmp8);
5132 pci_read_config_word(pdev, bits->reg, &tmp16);
5138 pci_read_config_dword(pdev, bits->reg, &tmp32);
5149 return (tmp == bits->val) ? 1 : 0;
5152 int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t state)
5154 pci_save_state(pdev);
5155 pci_disable_device(pdev);
5156 pci_set_power_state(pdev, PCI_D3hot);
5160 int ata_pci_device_resume(struct pci_dev *pdev)
5162 pci_set_power_state(pdev, PCI_D0);
5163 pci_restore_state(pdev);
5164 pci_enable_device(pdev);
5165 pci_set_master(pdev);
5168 #endif /* CONFIG_PCI */
5171 static int __init ata_init(void)
5173 ata_wq = create_workqueue("ata");
5177 printk(KERN_DEBUG "libata version " DRV_VERSION " loaded.\n");
5181 static void __exit ata_exit(void)
5183 destroy_workqueue(ata_wq);
5186 module_init(ata_init);
5187 module_exit(ata_exit);
5189 static unsigned long ratelimit_time;
5190 static spinlock_t ata_ratelimit_lock = SPIN_LOCK_UNLOCKED;
5192 int ata_ratelimit(void)
5195 unsigned long flags;
5197 spin_lock_irqsave(&ata_ratelimit_lock, flags);
5199 if (time_after(jiffies, ratelimit_time)) {
5201 ratelimit_time = jiffies + (HZ/5);
5205 spin_unlock_irqrestore(&ata_ratelimit_lock, flags);
5211 * libata is essentially a library of internal helper functions for
5212 * low-level ATA host controller drivers. As such, the API/ABI is
5213 * likely to change as new drivers are added and updated.
5214 * Do not depend on ABI/API stability.
5217 EXPORT_SYMBOL_GPL(ata_std_bios_param);
5218 EXPORT_SYMBOL_GPL(ata_std_ports);
5219 EXPORT_SYMBOL_GPL(ata_device_add);
5220 EXPORT_SYMBOL_GPL(ata_host_set_remove);
5221 EXPORT_SYMBOL_GPL(ata_sg_init);
5222 EXPORT_SYMBOL_GPL(ata_sg_init_one);
5223 EXPORT_SYMBOL_GPL(__ata_qc_complete);
5224 EXPORT_SYMBOL_GPL(ata_qc_issue_prot);
5225 EXPORT_SYMBOL_GPL(ata_eng_timeout);
5226 EXPORT_SYMBOL_GPL(ata_tf_load);
5227 EXPORT_SYMBOL_GPL(ata_tf_read);
5228 EXPORT_SYMBOL_GPL(ata_noop_dev_select);
5229 EXPORT_SYMBOL_GPL(ata_std_dev_select);
5230 EXPORT_SYMBOL_GPL(ata_tf_to_fis);
5231 EXPORT_SYMBOL_GPL(ata_tf_from_fis);
5232 EXPORT_SYMBOL_GPL(ata_check_status);
5233 EXPORT_SYMBOL_GPL(ata_altstatus);
5234 EXPORT_SYMBOL_GPL(ata_exec_command);
5235 EXPORT_SYMBOL_GPL(ata_port_start);
5236 EXPORT_SYMBOL_GPL(ata_port_stop);
5237 EXPORT_SYMBOL_GPL(ata_host_stop);
5238 EXPORT_SYMBOL_GPL(ata_interrupt);
5239 EXPORT_SYMBOL_GPL(ata_qc_prep);
5240 EXPORT_SYMBOL_GPL(ata_noop_qc_prep);
5241 EXPORT_SYMBOL_GPL(ata_bmdma_setup);
5242 EXPORT_SYMBOL_GPL(ata_bmdma_start);
5243 EXPORT_SYMBOL_GPL(ata_bmdma_irq_clear);
5244 EXPORT_SYMBOL_GPL(ata_bmdma_status);
5245 EXPORT_SYMBOL_GPL(ata_bmdma_stop);
5246 EXPORT_SYMBOL_GPL(ata_port_probe);
5247 EXPORT_SYMBOL_GPL(sata_phy_reset);
5248 EXPORT_SYMBOL_GPL(__sata_phy_reset);
5249 EXPORT_SYMBOL_GPL(ata_bus_reset);
5250 EXPORT_SYMBOL_GPL(ata_std_probeinit);
5251 EXPORT_SYMBOL_GPL(ata_std_softreset);
5252 EXPORT_SYMBOL_GPL(sata_std_hardreset);
5253 EXPORT_SYMBOL_GPL(ata_std_postreset);
5254 EXPORT_SYMBOL_GPL(ata_std_probe_reset);
5255 EXPORT_SYMBOL_GPL(ata_drive_probe_reset);
5256 EXPORT_SYMBOL_GPL(ata_dev_revalidate);
5257 EXPORT_SYMBOL_GPL(ata_dev_classify);
5258 EXPORT_SYMBOL_GPL(ata_dev_pair);
5259 EXPORT_SYMBOL_GPL(ata_port_disable);
5260 EXPORT_SYMBOL_GPL(ata_ratelimit);
5261 EXPORT_SYMBOL_GPL(ata_busy_sleep);
5262 EXPORT_SYMBOL_GPL(ata_port_queue_task);
5263 EXPORT_SYMBOL_GPL(ata_scsi_ioctl);
5264 EXPORT_SYMBOL_GPL(ata_scsi_queuecmd);
5265 EXPORT_SYMBOL_GPL(ata_scsi_error);
5266 EXPORT_SYMBOL_GPL(ata_scsi_slave_config);
5267 EXPORT_SYMBOL_GPL(ata_scsi_release);
5268 EXPORT_SYMBOL_GPL(ata_host_intr);
5269 EXPORT_SYMBOL_GPL(ata_id_string);
5270 EXPORT_SYMBOL_GPL(ata_id_c_string);
5271 EXPORT_SYMBOL_GPL(ata_scsi_simulate);
5272 EXPORT_SYMBOL_GPL(ata_eh_qc_complete);
5273 EXPORT_SYMBOL_GPL(ata_eh_qc_retry);
5275 EXPORT_SYMBOL_GPL(ata_pio_need_iordy);
5276 EXPORT_SYMBOL_GPL(ata_timing_compute);
5277 EXPORT_SYMBOL_GPL(ata_timing_merge);
5280 EXPORT_SYMBOL_GPL(pci_test_config_bits);
5281 EXPORT_SYMBOL_GPL(ata_pci_host_stop);
5282 EXPORT_SYMBOL_GPL(ata_pci_init_native_mode);
5283 EXPORT_SYMBOL_GPL(ata_pci_init_one);
5284 EXPORT_SYMBOL_GPL(ata_pci_remove_one);
5285 EXPORT_SYMBOL_GPL(ata_pci_device_suspend);
5286 EXPORT_SYMBOL_GPL(ata_pci_device_resume);
5287 EXPORT_SYMBOL_GPL(ata_pci_default_filter);
5288 EXPORT_SYMBOL_GPL(ata_pci_clear_simplex);
5289 #endif /* CONFIG_PCI */
5291 EXPORT_SYMBOL_GPL(ata_device_suspend);
5292 EXPORT_SYMBOL_GPL(ata_device_resume);
5293 EXPORT_SYMBOL_GPL(ata_scsi_device_suspend);
5294 EXPORT_SYMBOL_GPL(ata_scsi_device_resume);