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/kernel.h>
36 #include <linux/module.h>
37 #include <linux/pci.h>
38 #include <linux/init.h>
39 #include <linux/list.h>
41 #include <linux/highmem.h>
42 #include <linux/spinlock.h>
43 #include <linux/blkdev.h>
44 #include <linux/delay.h>
45 #include <linux/timer.h>
46 #include <linux/interrupt.h>
47 #include <linux/completion.h>
48 #include <linux/suspend.h>
49 #include <linux/workqueue.h>
50 #include <linux/jiffies.h>
51 #include <linux/scatterlist.h>
52 #include <scsi/scsi.h>
53 #include "scsi_priv.h"
54 #include <scsi/scsi_cmnd.h>
55 #include <scsi/scsi_host.h>
56 #include <linux/libata.h>
58 #include <asm/semaphore.h>
59 #include <asm/byteorder.h>
63 /* debounce timing parameters in msecs { interval, duration, timeout } */
64 const unsigned long sata_deb_timing_normal[] = { 5, 100, 2000 };
65 const unsigned long sata_deb_timing_hotplug[] = { 25, 500, 2000 };
66 const unsigned long sata_deb_timing_long[] = { 100, 2000, 5000 };
68 static unsigned int ata_dev_init_params(struct ata_device *dev,
69 u16 heads, u16 sectors);
70 static unsigned int ata_dev_set_xfermode(struct ata_device *dev);
71 static void ata_dev_xfermask(struct ata_device *dev);
73 static unsigned int ata_unique_id = 1;
74 static struct workqueue_struct *ata_wq;
76 struct workqueue_struct *ata_aux_wq;
78 int atapi_enabled = 1;
79 module_param(atapi_enabled, int, 0444);
80 MODULE_PARM_DESC(atapi_enabled, "Enable discovery of ATAPI devices (0=off, 1=on)");
83 module_param(atapi_dmadir, int, 0444);
84 MODULE_PARM_DESC(atapi_dmadir, "Enable ATAPI DMADIR bridge support (0=off, 1=on)");
87 module_param_named(fua, libata_fua, int, 0444);
88 MODULE_PARM_DESC(fua, "FUA support (0=off, 1=on)");
90 static int ata_probe_timeout = ATA_TMOUT_INTERNAL / HZ;
91 module_param(ata_probe_timeout, int, 0444);
92 MODULE_PARM_DESC(ata_probe_timeout, "Set ATA probing timeout (seconds)");
94 MODULE_AUTHOR("Jeff Garzik");
95 MODULE_DESCRIPTION("Library module for ATA devices");
96 MODULE_LICENSE("GPL");
97 MODULE_VERSION(DRV_VERSION);
101 * ata_tf_to_fis - Convert ATA taskfile to SATA FIS structure
102 * @tf: Taskfile to convert
103 * @fis: Buffer into which data will output
104 * @pmp: Port multiplier port
106 * Converts a standard ATA taskfile to a Serial ATA
107 * FIS structure (Register - Host to Device).
110 * Inherited from caller.
113 void ata_tf_to_fis(const struct ata_taskfile *tf, u8 *fis, u8 pmp)
115 fis[0] = 0x27; /* Register - Host to Device FIS */
116 fis[1] = (pmp & 0xf) | (1 << 7); /* Port multiplier number,
117 bit 7 indicates Command FIS */
118 fis[2] = tf->command;
119 fis[3] = tf->feature;
126 fis[8] = tf->hob_lbal;
127 fis[9] = tf->hob_lbam;
128 fis[10] = tf->hob_lbah;
129 fis[11] = tf->hob_feature;
132 fis[13] = tf->hob_nsect;
143 * ata_tf_from_fis - Convert SATA FIS to ATA taskfile
144 * @fis: Buffer from which data will be input
145 * @tf: Taskfile to output
147 * Converts a serial ATA FIS structure to a standard ATA taskfile.
150 * Inherited from caller.
153 void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf)
155 tf->command = fis[2]; /* status */
156 tf->feature = fis[3]; /* error */
163 tf->hob_lbal = fis[8];
164 tf->hob_lbam = fis[9];
165 tf->hob_lbah = fis[10];
168 tf->hob_nsect = fis[13];
171 static const u8 ata_rw_cmds[] = {
175 ATA_CMD_READ_MULTI_EXT,
176 ATA_CMD_WRITE_MULTI_EXT,
180 ATA_CMD_WRITE_MULTI_FUA_EXT,
184 ATA_CMD_PIO_READ_EXT,
185 ATA_CMD_PIO_WRITE_EXT,
198 ATA_CMD_WRITE_FUA_EXT
202 * ata_rwcmd_protocol - set taskfile r/w commands and protocol
203 * @qc: command to examine and configure
205 * Examine the device configuration and tf->flags to calculate
206 * the proper read/write commands and protocol to use.
211 int ata_rwcmd_protocol(struct ata_queued_cmd *qc)
213 struct ata_taskfile *tf = &qc->tf;
214 struct ata_device *dev = qc->dev;
217 int index, fua, lba48, write;
219 fua = (tf->flags & ATA_TFLAG_FUA) ? 4 : 0;
220 lba48 = (tf->flags & ATA_TFLAG_LBA48) ? 2 : 0;
221 write = (tf->flags & ATA_TFLAG_WRITE) ? 1 : 0;
223 if (dev->flags & ATA_DFLAG_PIO) {
224 tf->protocol = ATA_PROT_PIO;
225 index = dev->multi_count ? 0 : 8;
226 } else if (lba48 && (qc->ap->flags & ATA_FLAG_PIO_LBA48)) {
227 /* Unable to use DMA due to host limitation */
228 tf->protocol = ATA_PROT_PIO;
229 index = dev->multi_count ? 0 : 8;
231 tf->protocol = ATA_PROT_DMA;
235 cmd = ata_rw_cmds[index + fua + lba48 + write];
244 * ata_pack_xfermask - Pack pio, mwdma and udma masks into xfer_mask
245 * @pio_mask: pio_mask
246 * @mwdma_mask: mwdma_mask
247 * @udma_mask: udma_mask
249 * Pack @pio_mask, @mwdma_mask and @udma_mask into a single
250 * unsigned int xfer_mask.
258 static unsigned int ata_pack_xfermask(unsigned int pio_mask,
259 unsigned int mwdma_mask,
260 unsigned int udma_mask)
262 return ((pio_mask << ATA_SHIFT_PIO) & ATA_MASK_PIO) |
263 ((mwdma_mask << ATA_SHIFT_MWDMA) & ATA_MASK_MWDMA) |
264 ((udma_mask << ATA_SHIFT_UDMA) & ATA_MASK_UDMA);
268 * ata_unpack_xfermask - Unpack xfer_mask into pio, mwdma and udma masks
269 * @xfer_mask: xfer_mask to unpack
270 * @pio_mask: resulting pio_mask
271 * @mwdma_mask: resulting mwdma_mask
272 * @udma_mask: resulting udma_mask
274 * Unpack @xfer_mask into @pio_mask, @mwdma_mask and @udma_mask.
275 * Any NULL distination masks will be ignored.
277 static void ata_unpack_xfermask(unsigned int xfer_mask,
278 unsigned int *pio_mask,
279 unsigned int *mwdma_mask,
280 unsigned int *udma_mask)
283 *pio_mask = (xfer_mask & ATA_MASK_PIO) >> ATA_SHIFT_PIO;
285 *mwdma_mask = (xfer_mask & ATA_MASK_MWDMA) >> ATA_SHIFT_MWDMA;
287 *udma_mask = (xfer_mask & ATA_MASK_UDMA) >> ATA_SHIFT_UDMA;
290 static const struct ata_xfer_ent {
294 { ATA_SHIFT_PIO, ATA_BITS_PIO, XFER_PIO_0 },
295 { ATA_SHIFT_MWDMA, ATA_BITS_MWDMA, XFER_MW_DMA_0 },
296 { ATA_SHIFT_UDMA, ATA_BITS_UDMA, XFER_UDMA_0 },
301 * ata_xfer_mask2mode - Find matching XFER_* for the given xfer_mask
302 * @xfer_mask: xfer_mask of interest
304 * Return matching XFER_* value for @xfer_mask. Only the highest
305 * bit of @xfer_mask is considered.
311 * Matching XFER_* value, 0 if no match found.
313 static u8 ata_xfer_mask2mode(unsigned int xfer_mask)
315 int highbit = fls(xfer_mask) - 1;
316 const struct ata_xfer_ent *ent;
318 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
319 if (highbit >= ent->shift && highbit < ent->shift + ent->bits)
320 return ent->base + highbit - ent->shift;
325 * ata_xfer_mode2mask - Find matching xfer_mask for XFER_*
326 * @xfer_mode: XFER_* of interest
328 * Return matching xfer_mask for @xfer_mode.
334 * Matching xfer_mask, 0 if no match found.
336 static unsigned int ata_xfer_mode2mask(u8 xfer_mode)
338 const struct ata_xfer_ent *ent;
340 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
341 if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits)
342 return 1 << (ent->shift + xfer_mode - ent->base);
347 * ata_xfer_mode2shift - Find matching xfer_shift for XFER_*
348 * @xfer_mode: XFER_* of interest
350 * Return matching xfer_shift for @xfer_mode.
356 * Matching xfer_shift, -1 if no match found.
358 static int ata_xfer_mode2shift(unsigned int xfer_mode)
360 const struct ata_xfer_ent *ent;
362 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
363 if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits)
369 * ata_mode_string - convert xfer_mask to string
370 * @xfer_mask: mask of bits supported; only highest bit counts.
372 * Determine string which represents the highest speed
373 * (highest bit in @modemask).
379 * Constant C string representing highest speed listed in
380 * @mode_mask, or the constant C string "<n/a>".
382 static const char *ata_mode_string(unsigned int xfer_mask)
384 static const char * const xfer_mode_str[] = {
404 highbit = fls(xfer_mask) - 1;
405 if (highbit >= 0 && highbit < ARRAY_SIZE(xfer_mode_str))
406 return xfer_mode_str[highbit];
410 static const char *sata_spd_string(unsigned int spd)
412 static const char * const spd_str[] = {
417 if (spd == 0 || (spd - 1) >= ARRAY_SIZE(spd_str))
419 return spd_str[spd - 1];
422 void ata_dev_disable(struct ata_device *dev)
424 if (ata_dev_enabled(dev) && ata_msg_drv(dev->ap)) {
425 ata_dev_printk(dev, KERN_WARNING, "disabled\n");
431 * ata_pio_devchk - PATA device presence detection
432 * @ap: ATA channel to examine
433 * @device: Device to examine (starting at zero)
435 * This technique was originally described in
436 * Hale Landis's ATADRVR (www.ata-atapi.com), and
437 * later found its way into the ATA/ATAPI spec.
439 * Write a pattern to the ATA shadow registers,
440 * and if a device is present, it will respond by
441 * correctly storing and echoing back the
442 * ATA shadow register contents.
448 static unsigned int ata_pio_devchk(struct ata_port *ap,
451 struct ata_ioports *ioaddr = &ap->ioaddr;
454 ap->ops->dev_select(ap, device);
456 outb(0x55, ioaddr->nsect_addr);
457 outb(0xaa, ioaddr->lbal_addr);
459 outb(0xaa, ioaddr->nsect_addr);
460 outb(0x55, ioaddr->lbal_addr);
462 outb(0x55, ioaddr->nsect_addr);
463 outb(0xaa, ioaddr->lbal_addr);
465 nsect = inb(ioaddr->nsect_addr);
466 lbal = inb(ioaddr->lbal_addr);
468 if ((nsect == 0x55) && (lbal == 0xaa))
469 return 1; /* we found a device */
471 return 0; /* nothing found */
475 * ata_mmio_devchk - PATA device presence detection
476 * @ap: ATA channel to examine
477 * @device: Device to examine (starting at zero)
479 * This technique was originally described in
480 * Hale Landis's ATADRVR (www.ata-atapi.com), and
481 * later found its way into the ATA/ATAPI spec.
483 * Write a pattern to the ATA shadow registers,
484 * and if a device is present, it will respond by
485 * correctly storing and echoing back the
486 * ATA shadow register contents.
492 static unsigned int ata_mmio_devchk(struct ata_port *ap,
495 struct ata_ioports *ioaddr = &ap->ioaddr;
498 ap->ops->dev_select(ap, device);
500 writeb(0x55, (void __iomem *) ioaddr->nsect_addr);
501 writeb(0xaa, (void __iomem *) ioaddr->lbal_addr);
503 writeb(0xaa, (void __iomem *) ioaddr->nsect_addr);
504 writeb(0x55, (void __iomem *) ioaddr->lbal_addr);
506 writeb(0x55, (void __iomem *) ioaddr->nsect_addr);
507 writeb(0xaa, (void __iomem *) ioaddr->lbal_addr);
509 nsect = readb((void __iomem *) ioaddr->nsect_addr);
510 lbal = readb((void __iomem *) ioaddr->lbal_addr);
512 if ((nsect == 0x55) && (lbal == 0xaa))
513 return 1; /* we found a device */
515 return 0; /* nothing found */
519 * ata_devchk - PATA device presence detection
520 * @ap: ATA channel to examine
521 * @device: Device to examine (starting at zero)
523 * Dispatch ATA device presence detection, depending
524 * on whether we are using PIO or MMIO to talk to the
525 * ATA shadow registers.
531 static unsigned int ata_devchk(struct ata_port *ap,
534 if (ap->flags & ATA_FLAG_MMIO)
535 return ata_mmio_devchk(ap, device);
536 return ata_pio_devchk(ap, device);
540 * ata_dev_classify - determine device type based on ATA-spec signature
541 * @tf: ATA taskfile register set for device to be identified
543 * Determine from taskfile register contents whether a device is
544 * ATA or ATAPI, as per "Signature and persistence" section
545 * of ATA/PI spec (volume 1, sect 5.14).
551 * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, or %ATA_DEV_UNKNOWN
552 * the event of failure.
555 unsigned int ata_dev_classify(const struct ata_taskfile *tf)
557 /* Apple's open source Darwin code hints that some devices only
558 * put a proper signature into the LBA mid/high registers,
559 * So, we only check those. It's sufficient for uniqueness.
562 if (((tf->lbam == 0) && (tf->lbah == 0)) ||
563 ((tf->lbam == 0x3c) && (tf->lbah == 0xc3))) {
564 DPRINTK("found ATA device by sig\n");
568 if (((tf->lbam == 0x14) && (tf->lbah == 0xeb)) ||
569 ((tf->lbam == 0x69) && (tf->lbah == 0x96))) {
570 DPRINTK("found ATAPI device by sig\n");
571 return ATA_DEV_ATAPI;
574 DPRINTK("unknown device\n");
575 return ATA_DEV_UNKNOWN;
579 * ata_dev_try_classify - Parse returned ATA device signature
580 * @ap: ATA channel to examine
581 * @device: Device to examine (starting at zero)
582 * @r_err: Value of error register on completion
584 * After an event -- SRST, E.D.D., or SATA COMRESET -- occurs,
585 * an ATA/ATAPI-defined set of values is placed in the ATA
586 * shadow registers, indicating the results of device detection
589 * Select the ATA device, and read the values from the ATA shadow
590 * registers. Then parse according to the Error register value,
591 * and the spec-defined values examined by ata_dev_classify().
597 * Device type - %ATA_DEV_ATA, %ATA_DEV_ATAPI or %ATA_DEV_NONE.
601 ata_dev_try_classify(struct ata_port *ap, unsigned int device, u8 *r_err)
603 struct ata_taskfile tf;
607 ap->ops->dev_select(ap, device);
609 memset(&tf, 0, sizeof(tf));
611 ap->ops->tf_read(ap, &tf);
616 /* see if device passed diags */
619 else if ((device == 0) && (err == 0x81))
624 /* determine if device is ATA or ATAPI */
625 class = ata_dev_classify(&tf);
627 if (class == ATA_DEV_UNKNOWN)
629 if ((class == ATA_DEV_ATA) && (ata_chk_status(ap) == 0))
635 * ata_id_string - Convert IDENTIFY DEVICE page into string
636 * @id: IDENTIFY DEVICE results we will examine
637 * @s: string into which data is output
638 * @ofs: offset into identify device page
639 * @len: length of string to return. must be an even number.
641 * The strings in the IDENTIFY DEVICE page are broken up into
642 * 16-bit chunks. Run through the string, and output each
643 * 8-bit chunk linearly, regardless of platform.
649 void ata_id_string(const u16 *id, unsigned char *s,
650 unsigned int ofs, unsigned int len)
669 * ata_id_c_string - Convert IDENTIFY DEVICE page into C string
670 * @id: IDENTIFY DEVICE results we will examine
671 * @s: string into which data is output
672 * @ofs: offset into identify device page
673 * @len: length of string to return. must be an odd number.
675 * This function is identical to ata_id_string except that it
676 * trims trailing spaces and terminates the resulting string with
677 * null. @len must be actual maximum length (even number) + 1.
682 void ata_id_c_string(const u16 *id, unsigned char *s,
683 unsigned int ofs, unsigned int len)
689 ata_id_string(id, s, ofs, len - 1);
691 p = s + strnlen(s, len - 1);
692 while (p > s && p[-1] == ' ')
697 static u64 ata_id_n_sectors(const u16 *id)
699 if (ata_id_has_lba(id)) {
700 if (ata_id_has_lba48(id))
701 return ata_id_u64(id, 100);
703 return ata_id_u32(id, 60);
705 if (ata_id_current_chs_valid(id))
706 return ata_id_u32(id, 57);
708 return id[1] * id[3] * id[6];
713 * ata_noop_dev_select - Select device 0/1 on ATA bus
714 * @ap: ATA channel to manipulate
715 * @device: ATA device (numbered from zero) to select
717 * This function performs no actual function.
719 * May be used as the dev_select() entry in ata_port_operations.
724 void ata_noop_dev_select (struct ata_port *ap, unsigned int device)
730 * ata_std_dev_select - Select device 0/1 on ATA bus
731 * @ap: ATA channel to manipulate
732 * @device: ATA device (numbered from zero) to select
734 * Use the method defined in the ATA specification to
735 * make either device 0, or device 1, active on the
736 * ATA channel. Works with both PIO and MMIO.
738 * May be used as the dev_select() entry in ata_port_operations.
744 void ata_std_dev_select (struct ata_port *ap, unsigned int device)
749 tmp = ATA_DEVICE_OBS;
751 tmp = ATA_DEVICE_OBS | ATA_DEV1;
753 if (ap->flags & ATA_FLAG_MMIO) {
754 writeb(tmp, (void __iomem *) ap->ioaddr.device_addr);
756 outb(tmp, ap->ioaddr.device_addr);
758 ata_pause(ap); /* needed; also flushes, for mmio */
762 * ata_dev_select - Select device 0/1 on ATA bus
763 * @ap: ATA channel to manipulate
764 * @device: ATA device (numbered from zero) to select
765 * @wait: non-zero to wait for Status register BSY bit to clear
766 * @can_sleep: non-zero if context allows sleeping
768 * Use the method defined in the ATA specification to
769 * make either device 0, or device 1, active on the
772 * This is a high-level version of ata_std_dev_select(),
773 * which additionally provides the services of inserting
774 * the proper pauses and status polling, where needed.
780 void ata_dev_select(struct ata_port *ap, unsigned int device,
781 unsigned int wait, unsigned int can_sleep)
783 if (ata_msg_probe(ap))
784 ata_port_printk(ap, KERN_INFO, "ata_dev_select: ENTER, ata%u: "
785 "device %u, wait %u\n", ap->id, device, wait);
790 ap->ops->dev_select(ap, device);
793 if (can_sleep && ap->device[device].class == ATA_DEV_ATAPI)
800 * ata_dump_id - IDENTIFY DEVICE info debugging output
801 * @id: IDENTIFY DEVICE page to dump
803 * Dump selected 16-bit words from the given IDENTIFY DEVICE
810 static inline void ata_dump_id(const u16 *id)
812 DPRINTK("49==0x%04x "
822 DPRINTK("80==0x%04x "
832 DPRINTK("88==0x%04x "
839 * ata_id_xfermask - Compute xfermask from the given IDENTIFY data
840 * @id: IDENTIFY data to compute xfer mask from
842 * Compute the xfermask for this device. This is not as trivial
843 * as it seems if we must consider early devices correctly.
845 * FIXME: pre IDE drive timing (do we care ?).
853 static unsigned int ata_id_xfermask(const u16 *id)
855 unsigned int pio_mask, mwdma_mask, udma_mask;
857 /* Usual case. Word 53 indicates word 64 is valid */
858 if (id[ATA_ID_FIELD_VALID] & (1 << 1)) {
859 pio_mask = id[ATA_ID_PIO_MODES] & 0x03;
863 /* If word 64 isn't valid then Word 51 high byte holds
864 * the PIO timing number for the maximum. Turn it into
867 pio_mask = (2 << (id[ATA_ID_OLD_PIO_MODES] & 0xFF)) - 1 ;
869 /* But wait.. there's more. Design your standards by
870 * committee and you too can get a free iordy field to
871 * process. However its the speeds not the modes that
872 * are supported... Note drivers using the timing API
873 * will get this right anyway
877 mwdma_mask = id[ATA_ID_MWDMA_MODES] & 0x07;
880 if (id[ATA_ID_FIELD_VALID] & (1 << 2))
881 udma_mask = id[ATA_ID_UDMA_MODES] & 0xff;
883 return ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask);
887 * ata_port_queue_task - Queue port_task
888 * @ap: The ata_port to queue port_task for
889 * @fn: workqueue function to be scheduled
890 * @data: data value to pass to workqueue function
891 * @delay: delay time for workqueue function
893 * Schedule @fn(@data) for execution after @delay jiffies using
894 * port_task. There is one port_task per port and it's the
895 * user(low level driver)'s responsibility to make sure that only
896 * one task is active at any given time.
898 * libata core layer takes care of synchronization between
899 * port_task and EH. ata_port_queue_task() may be ignored for EH
903 * Inherited from caller.
905 void ata_port_queue_task(struct ata_port *ap, void (*fn)(void *), void *data,
910 if (ap->pflags & ATA_PFLAG_FLUSH_PORT_TASK)
913 PREPARE_WORK(&ap->port_task, fn, data);
916 rc = queue_work(ata_wq, &ap->port_task);
918 rc = queue_delayed_work(ata_wq, &ap->port_task, delay);
920 /* rc == 0 means that another user is using port task */
925 * ata_port_flush_task - Flush port_task
926 * @ap: The ata_port to flush port_task for
928 * After this function completes, port_task is guranteed not to
929 * be running or scheduled.
932 * Kernel thread context (may sleep)
934 void ata_port_flush_task(struct ata_port *ap)
940 spin_lock_irqsave(ap->lock, flags);
941 ap->pflags |= ATA_PFLAG_FLUSH_PORT_TASK;
942 spin_unlock_irqrestore(ap->lock, flags);
944 DPRINTK("flush #1\n");
945 flush_workqueue(ata_wq);
948 * At this point, if a task is running, it's guaranteed to see
949 * the FLUSH flag; thus, it will never queue pio tasks again.
952 if (!cancel_delayed_work(&ap->port_task)) {
954 ata_port_printk(ap, KERN_DEBUG, "%s: flush #2\n",
956 flush_workqueue(ata_wq);
959 spin_lock_irqsave(ap->lock, flags);
960 ap->pflags &= ~ATA_PFLAG_FLUSH_PORT_TASK;
961 spin_unlock_irqrestore(ap->lock, flags);
964 ata_port_printk(ap, KERN_DEBUG, "%s: EXIT\n", __FUNCTION__);
967 void ata_qc_complete_internal(struct ata_queued_cmd *qc)
969 struct completion *waiting = qc->private_data;
975 * ata_exec_internal - execute libata internal command
976 * @dev: Device to which the command is sent
977 * @tf: Taskfile registers for the command and the result
978 * @cdb: CDB for packet command
979 * @dma_dir: Data tranfer direction of the command
980 * @buf: Data buffer of the command
981 * @buflen: Length of data buffer
983 * Executes libata internal command with timeout. @tf contains
984 * command on entry and result on return. Timeout and error
985 * conditions are reported via return value. No recovery action
986 * is taken after a command times out. It's caller's duty to
987 * clean up after timeout.
990 * None. Should be called with kernel context, might sleep.
993 * Zero on success, AC_ERR_* mask on failure
995 unsigned ata_exec_internal(struct ata_device *dev,
996 struct ata_taskfile *tf, const u8 *cdb,
997 int dma_dir, void *buf, unsigned int buflen)
999 struct ata_port *ap = dev->ap;
1000 u8 command = tf->command;
1001 struct ata_queued_cmd *qc;
1002 unsigned int tag, preempted_tag;
1003 u32 preempted_sactive, preempted_qc_active;
1004 DECLARE_COMPLETION_ONSTACK(wait);
1005 unsigned long flags;
1006 unsigned int err_mask;
1009 spin_lock_irqsave(ap->lock, flags);
1011 /* no internal command while frozen */
1012 if (ap->pflags & ATA_PFLAG_FROZEN) {
1013 spin_unlock_irqrestore(ap->lock, flags);
1014 return AC_ERR_SYSTEM;
1017 /* initialize internal qc */
1019 /* XXX: Tag 0 is used for drivers with legacy EH as some
1020 * drivers choke if any other tag is given. This breaks
1021 * ata_tag_internal() test for those drivers. Don't use new
1022 * EH stuff without converting to it.
1024 if (ap->ops->error_handler)
1025 tag = ATA_TAG_INTERNAL;
1029 if (test_and_set_bit(tag, &ap->qc_allocated))
1031 qc = __ata_qc_from_tag(ap, tag);
1039 preempted_tag = ap->active_tag;
1040 preempted_sactive = ap->sactive;
1041 preempted_qc_active = ap->qc_active;
1042 ap->active_tag = ATA_TAG_POISON;
1046 /* prepare & issue qc */
1049 memcpy(qc->cdb, cdb, ATAPI_CDB_LEN);
1050 qc->flags |= ATA_QCFLAG_RESULT_TF;
1051 qc->dma_dir = dma_dir;
1052 if (dma_dir != DMA_NONE) {
1053 ata_sg_init_one(qc, buf, buflen);
1054 qc->nsect = buflen / ATA_SECT_SIZE;
1057 qc->private_data = &wait;
1058 qc->complete_fn = ata_qc_complete_internal;
1062 spin_unlock_irqrestore(ap->lock, flags);
1064 rc = wait_for_completion_timeout(&wait, ata_probe_timeout);
1066 ata_port_flush_task(ap);
1069 spin_lock_irqsave(ap->lock, flags);
1071 /* We're racing with irq here. If we lose, the
1072 * following test prevents us from completing the qc
1073 * twice. If we win, the port is frozen and will be
1074 * cleaned up by ->post_internal_cmd().
1076 if (qc->flags & ATA_QCFLAG_ACTIVE) {
1077 qc->err_mask |= AC_ERR_TIMEOUT;
1079 if (ap->ops->error_handler)
1080 ata_port_freeze(ap);
1082 ata_qc_complete(qc);
1084 if (ata_msg_warn(ap))
1085 ata_dev_printk(dev, KERN_WARNING,
1086 "qc timeout (cmd 0x%x)\n", command);
1089 spin_unlock_irqrestore(ap->lock, flags);
1092 /* do post_internal_cmd */
1093 if (ap->ops->post_internal_cmd)
1094 ap->ops->post_internal_cmd(qc);
1096 if (qc->flags & ATA_QCFLAG_FAILED && !qc->err_mask) {
1097 if (ata_msg_warn(ap))
1098 ata_dev_printk(dev, KERN_WARNING,
1099 "zero err_mask for failed "
1100 "internal command, assuming AC_ERR_OTHER\n");
1101 qc->err_mask |= AC_ERR_OTHER;
1105 spin_lock_irqsave(ap->lock, flags);
1107 *tf = qc->result_tf;
1108 err_mask = qc->err_mask;
1111 ap->active_tag = preempted_tag;
1112 ap->sactive = preempted_sactive;
1113 ap->qc_active = preempted_qc_active;
1115 /* XXX - Some LLDDs (sata_mv) disable port on command failure.
1116 * Until those drivers are fixed, we detect the condition
1117 * here, fail the command with AC_ERR_SYSTEM and reenable the
1120 * Note that this doesn't change any behavior as internal
1121 * command failure results in disabling the device in the
1122 * higher layer for LLDDs without new reset/EH callbacks.
1124 * Kill the following code as soon as those drivers are fixed.
1126 if (ap->flags & ATA_FLAG_DISABLED) {
1127 err_mask |= AC_ERR_SYSTEM;
1131 spin_unlock_irqrestore(ap->lock, flags);
1137 * ata_do_simple_cmd - execute simple internal command
1138 * @dev: Device to which the command is sent
1139 * @cmd: Opcode to execute
1141 * Execute a 'simple' command, that only consists of the opcode
1142 * 'cmd' itself, without filling any other registers
1145 * Kernel thread context (may sleep).
1148 * Zero on success, AC_ERR_* mask on failure
1150 unsigned int ata_do_simple_cmd(struct ata_device *dev, u8 cmd)
1152 struct ata_taskfile tf;
1154 ata_tf_init(dev, &tf);
1157 tf.flags |= ATA_TFLAG_DEVICE;
1158 tf.protocol = ATA_PROT_NODATA;
1160 return ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0);
1164 * ata_pio_need_iordy - check if iordy needed
1167 * Check if the current speed of the device requires IORDY. Used
1168 * by various controllers for chip configuration.
1171 unsigned int ata_pio_need_iordy(const struct ata_device *adev)
1174 int speed = adev->pio_mode - XFER_PIO_0;
1181 /* If we have no drive specific rule, then PIO 2 is non IORDY */
1183 if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE */
1184 pio = adev->id[ATA_ID_EIDE_PIO];
1185 /* Is the speed faster than the drive allows non IORDY ? */
1187 /* This is cycle times not frequency - watch the logic! */
1188 if (pio > 240) /* PIO2 is 240nS per cycle */
1197 * ata_dev_read_id - Read ID data from the specified device
1198 * @dev: target device
1199 * @p_class: pointer to class of the target device (may be changed)
1200 * @post_reset: is this read ID post-reset?
1201 * @id: buffer to read IDENTIFY data into
1203 * Read ID data from the specified device. ATA_CMD_ID_ATA is
1204 * performed on ATA devices and ATA_CMD_ID_ATAPI on ATAPI
1205 * devices. This function also issues ATA_CMD_INIT_DEV_PARAMS
1206 * for pre-ATA4 drives.
1209 * Kernel thread context (may sleep)
1212 * 0 on success, -errno otherwise.
1214 int ata_dev_read_id(struct ata_device *dev, unsigned int *p_class,
1215 int post_reset, u16 *id)
1217 struct ata_port *ap = dev->ap;
1218 unsigned int class = *p_class;
1219 struct ata_taskfile tf;
1220 unsigned int err_mask = 0;
1224 if (ata_msg_ctl(ap))
1225 ata_dev_printk(dev, KERN_DEBUG, "%s: ENTER, host %u, dev %u\n",
1226 __FUNCTION__, ap->id, dev->devno);
1228 ata_dev_select(ap, dev->devno, 1, 1); /* select device 0/1 */
1231 ata_tf_init(dev, &tf);
1235 tf.command = ATA_CMD_ID_ATA;
1238 tf.command = ATA_CMD_ID_ATAPI;
1242 reason = "unsupported class";
1246 tf.protocol = ATA_PROT_PIO;
1248 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_FROM_DEVICE,
1249 id, sizeof(id[0]) * ATA_ID_WORDS);
1252 reason = "I/O error";
1256 swap_buf_le16(id, ATA_ID_WORDS);
1259 if ((class == ATA_DEV_ATA) != (ata_id_is_ata(id) | ata_id_is_cfa(id))) {
1261 reason = "device reports illegal type";
1265 if (post_reset && class == ATA_DEV_ATA) {
1267 * The exact sequence expected by certain pre-ATA4 drives is:
1270 * INITIALIZE DEVICE PARAMETERS
1272 * Some drives were very specific about that exact sequence.
1274 if (ata_id_major_version(id) < 4 || !ata_id_has_lba(id)) {
1275 err_mask = ata_dev_init_params(dev, id[3], id[6]);
1278 reason = "INIT_DEV_PARAMS failed";
1282 /* current CHS translation info (id[53-58]) might be
1283 * changed. reread the identify device info.
1295 if (ata_msg_warn(ap))
1296 ata_dev_printk(dev, KERN_WARNING, "failed to IDENTIFY "
1297 "(%s, err_mask=0x%x)\n", reason, err_mask);
1301 static inline u8 ata_dev_knobble(struct ata_device *dev)
1303 return ((dev->ap->cbl == ATA_CBL_SATA) && (!ata_id_is_sata(dev->id)));
1306 static void ata_dev_config_ncq(struct ata_device *dev,
1307 char *desc, size_t desc_sz)
1309 struct ata_port *ap = dev->ap;
1310 int hdepth = 0, ddepth = ata_id_queue_depth(dev->id);
1312 if (!ata_id_has_ncq(dev->id)) {
1317 if (ap->flags & ATA_FLAG_NCQ) {
1318 hdepth = min(ap->host->can_queue, ATA_MAX_QUEUE - 1);
1319 dev->flags |= ATA_DFLAG_NCQ;
1322 if (hdepth >= ddepth)
1323 snprintf(desc, desc_sz, "NCQ (depth %d)", ddepth);
1325 snprintf(desc, desc_sz, "NCQ (depth %d/%d)", hdepth, ddepth);
1328 static void ata_set_port_max_cmd_len(struct ata_port *ap)
1333 ap->host->max_cmd_len = 0;
1334 for (i = 0; i < ATA_MAX_DEVICES; i++)
1335 ap->host->max_cmd_len = max_t(unsigned int,
1336 ap->host->max_cmd_len,
1337 ap->device[i].cdb_len);
1342 * ata_dev_configure - Configure the specified ATA/ATAPI device
1343 * @dev: Target device to configure
1344 * @print_info: Enable device info printout
1346 * Configure @dev according to @dev->id. Generic and low-level
1347 * driver specific fixups are also applied.
1350 * Kernel thread context (may sleep)
1353 * 0 on success, -errno otherwise
1355 int ata_dev_configure(struct ata_device *dev, int print_info)
1357 struct ata_port *ap = dev->ap;
1358 const u16 *id = dev->id;
1359 unsigned int xfer_mask;
1362 if (!ata_dev_enabled(dev) && ata_msg_info(ap)) {
1363 ata_dev_printk(dev, KERN_INFO,
1364 "%s: ENTER/EXIT (host %u, dev %u) -- nodev\n",
1365 __FUNCTION__, ap->id, dev->devno);
1369 if (ata_msg_probe(ap))
1370 ata_dev_printk(dev, KERN_DEBUG, "%s: ENTER, host %u, dev %u\n",
1371 __FUNCTION__, ap->id, dev->devno);
1373 /* print device capabilities */
1374 if (ata_msg_probe(ap))
1375 ata_dev_printk(dev, KERN_DEBUG,
1376 "%s: cfg 49:%04x 82:%04x 83:%04x 84:%04x "
1377 "85:%04x 86:%04x 87:%04x 88:%04x\n",
1379 id[49], id[82], id[83], id[84],
1380 id[85], id[86], id[87], id[88]);
1382 /* initialize to-be-configured parameters */
1383 dev->flags &= ~ATA_DFLAG_CFG_MASK;
1384 dev->max_sectors = 0;
1392 * common ATA, ATAPI feature tests
1395 /* find max transfer mode; for printk only */
1396 xfer_mask = ata_id_xfermask(id);
1398 if (ata_msg_probe(ap))
1401 /* ATA-specific feature tests */
1402 if (dev->class == ATA_DEV_ATA) {
1403 dev->n_sectors = ata_id_n_sectors(id);
1405 if (ata_id_has_lba(id)) {
1406 const char *lba_desc;
1410 dev->flags |= ATA_DFLAG_LBA;
1411 if (ata_id_has_lba48(id)) {
1412 dev->flags |= ATA_DFLAG_LBA48;
1417 ata_dev_config_ncq(dev, ncq_desc, sizeof(ncq_desc));
1419 /* print device info to dmesg */
1420 if (ata_msg_drv(ap) && print_info)
1421 ata_dev_printk(dev, KERN_INFO, "ATA-%d, "
1422 "max %s, %Lu sectors: %s %s\n",
1423 ata_id_major_version(id),
1424 ata_mode_string(xfer_mask),
1425 (unsigned long long)dev->n_sectors,
1426 lba_desc, ncq_desc);
1430 /* Default translation */
1431 dev->cylinders = id[1];
1433 dev->sectors = id[6];
1435 if (ata_id_current_chs_valid(id)) {
1436 /* Current CHS translation is valid. */
1437 dev->cylinders = id[54];
1438 dev->heads = id[55];
1439 dev->sectors = id[56];
1442 /* print device info to dmesg */
1443 if (ata_msg_drv(ap) && print_info)
1444 ata_dev_printk(dev, KERN_INFO, "ATA-%d, "
1445 "max %s, %Lu sectors: CHS %u/%u/%u\n",
1446 ata_id_major_version(id),
1447 ata_mode_string(xfer_mask),
1448 (unsigned long long)dev->n_sectors,
1449 dev->cylinders, dev->heads,
1453 if (dev->id[59] & 0x100) {
1454 dev->multi_count = dev->id[59] & 0xff;
1455 if (ata_msg_drv(ap) && print_info)
1456 ata_dev_printk(dev, KERN_INFO,
1457 "ata%u: dev %u multi count %u\n",
1458 ap->id, dev->devno, dev->multi_count);
1464 /* ATAPI-specific feature tests */
1465 else if (dev->class == ATA_DEV_ATAPI) {
1466 char *cdb_intr_string = "";
1468 rc = atapi_cdb_len(id);
1469 if ((rc < 12) || (rc > ATAPI_CDB_LEN)) {
1470 if (ata_msg_warn(ap))
1471 ata_dev_printk(dev, KERN_WARNING,
1472 "unsupported CDB len\n");
1476 dev->cdb_len = (unsigned int) rc;
1478 if (ata_id_cdb_intr(dev->id)) {
1479 dev->flags |= ATA_DFLAG_CDB_INTR;
1480 cdb_intr_string = ", CDB intr";
1483 /* print device info to dmesg */
1484 if (ata_msg_drv(ap) && print_info)
1485 ata_dev_printk(dev, KERN_INFO, "ATAPI, max %s%s\n",
1486 ata_mode_string(xfer_mask),
1490 ata_set_port_max_cmd_len(ap);
1492 /* limit bridge transfers to udma5, 200 sectors */
1493 if (ata_dev_knobble(dev)) {
1494 if (ata_msg_drv(ap) && print_info)
1495 ata_dev_printk(dev, KERN_INFO,
1496 "applying bridge limits\n");
1497 dev->udma_mask &= ATA_UDMA5;
1498 dev->max_sectors = ATA_MAX_SECTORS;
1501 if (ap->ops->dev_config)
1502 ap->ops->dev_config(ap, dev);
1504 if (ata_msg_probe(ap))
1505 ata_dev_printk(dev, KERN_DEBUG, "%s: EXIT, drv_stat = 0x%x\n",
1506 __FUNCTION__, ata_chk_status(ap));
1510 if (ata_msg_probe(ap))
1511 ata_dev_printk(dev, KERN_DEBUG,
1512 "%s: EXIT, err\n", __FUNCTION__);
1517 * ata_bus_probe - Reset and probe ATA bus
1520 * Master ATA bus probing function. Initiates a hardware-dependent
1521 * bus reset, then attempts to identify any devices found on
1525 * PCI/etc. bus probe sem.
1528 * Zero on success, negative errno otherwise.
1531 static int ata_bus_probe(struct ata_port *ap)
1533 unsigned int classes[ATA_MAX_DEVICES];
1534 int tries[ATA_MAX_DEVICES];
1535 int i, rc, down_xfermask;
1536 struct ata_device *dev;
1540 for (i = 0; i < ATA_MAX_DEVICES; i++)
1541 tries[i] = ATA_PROBE_MAX_TRIES;
1546 /* reset and determine device classes */
1547 ap->ops->phy_reset(ap);
1549 for (i = 0; i < ATA_MAX_DEVICES; i++) {
1550 dev = &ap->device[i];
1552 if (!(ap->flags & ATA_FLAG_DISABLED) &&
1553 dev->class != ATA_DEV_UNKNOWN)
1554 classes[dev->devno] = dev->class;
1556 classes[dev->devno] = ATA_DEV_NONE;
1558 dev->class = ATA_DEV_UNKNOWN;
1563 /* after the reset the device state is PIO 0 and the controller
1564 state is undefined. Record the mode */
1566 for (i = 0; i < ATA_MAX_DEVICES; i++)
1567 ap->device[i].pio_mode = XFER_PIO_0;
1569 /* read IDENTIFY page and configure devices */
1570 for (i = 0; i < ATA_MAX_DEVICES; i++) {
1571 dev = &ap->device[i];
1574 dev->class = classes[i];
1576 if (!ata_dev_enabled(dev))
1579 rc = ata_dev_read_id(dev, &dev->class, 1, dev->id);
1583 rc = ata_dev_configure(dev, 1);
1588 /* configure transfer mode */
1589 rc = ata_set_mode(ap, &dev);
1595 for (i = 0; i < ATA_MAX_DEVICES; i++)
1596 if (ata_dev_enabled(&ap->device[i]))
1599 /* no device present, disable port */
1600 ata_port_disable(ap);
1601 ap->ops->port_disable(ap);
1608 tries[dev->devno] = 0;
1611 sata_down_spd_limit(ap);
1614 tries[dev->devno]--;
1615 if (down_xfermask &&
1616 ata_down_xfermask_limit(dev, tries[dev->devno] == 1))
1617 tries[dev->devno] = 0;
1620 if (!tries[dev->devno]) {
1621 ata_down_xfermask_limit(dev, 1);
1622 ata_dev_disable(dev);
1629 * ata_port_probe - Mark port as enabled
1630 * @ap: Port for which we indicate enablement
1632 * Modify @ap data structure such that the system
1633 * thinks that the entire port is enabled.
1635 * LOCKING: host_set lock, or some other form of
1639 void ata_port_probe(struct ata_port *ap)
1641 ap->flags &= ~ATA_FLAG_DISABLED;
1645 * sata_print_link_status - Print SATA link status
1646 * @ap: SATA port to printk link status about
1648 * This function prints link speed and status of a SATA link.
1653 static void sata_print_link_status(struct ata_port *ap)
1655 u32 sstatus, scontrol, tmp;
1657 if (sata_scr_read(ap, SCR_STATUS, &sstatus))
1659 sata_scr_read(ap, SCR_CONTROL, &scontrol);
1661 if (ata_port_online(ap)) {
1662 tmp = (sstatus >> 4) & 0xf;
1663 ata_port_printk(ap, KERN_INFO,
1664 "SATA link up %s (SStatus %X SControl %X)\n",
1665 sata_spd_string(tmp), sstatus, scontrol);
1667 ata_port_printk(ap, KERN_INFO,
1668 "SATA link down (SStatus %X SControl %X)\n",
1674 * __sata_phy_reset - Wake/reset a low-level SATA PHY
1675 * @ap: SATA port associated with target SATA PHY.
1677 * This function issues commands to standard SATA Sxxx
1678 * PHY registers, to wake up the phy (and device), and
1679 * clear any reset condition.
1682 * PCI/etc. bus probe sem.
1685 void __sata_phy_reset(struct ata_port *ap)
1688 unsigned long timeout = jiffies + (HZ * 5);
1690 if (ap->flags & ATA_FLAG_SATA_RESET) {
1691 /* issue phy wake/reset */
1692 sata_scr_write_flush(ap, SCR_CONTROL, 0x301);
1693 /* Couldn't find anything in SATA I/II specs, but
1694 * AHCI-1.1 10.4.2 says at least 1 ms. */
1697 /* phy wake/clear reset */
1698 sata_scr_write_flush(ap, SCR_CONTROL, 0x300);
1700 /* wait for phy to become ready, if necessary */
1703 sata_scr_read(ap, SCR_STATUS, &sstatus);
1704 if ((sstatus & 0xf) != 1)
1706 } while (time_before(jiffies, timeout));
1708 /* print link status */
1709 sata_print_link_status(ap);
1711 /* TODO: phy layer with polling, timeouts, etc. */
1712 if (!ata_port_offline(ap))
1715 ata_port_disable(ap);
1717 if (ap->flags & ATA_FLAG_DISABLED)
1720 if (ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT)) {
1721 ata_port_disable(ap);
1725 ap->cbl = ATA_CBL_SATA;
1729 * sata_phy_reset - Reset SATA bus.
1730 * @ap: SATA port associated with target SATA PHY.
1732 * This function resets the SATA bus, and then probes
1733 * the bus for devices.
1736 * PCI/etc. bus probe sem.
1739 void sata_phy_reset(struct ata_port *ap)
1741 __sata_phy_reset(ap);
1742 if (ap->flags & ATA_FLAG_DISABLED)
1748 * ata_dev_pair - return other device on cable
1751 * Obtain the other device on the same cable, or if none is
1752 * present NULL is returned
1755 struct ata_device *ata_dev_pair(struct ata_device *adev)
1757 struct ata_port *ap = adev->ap;
1758 struct ata_device *pair = &ap->device[1 - adev->devno];
1759 if (!ata_dev_enabled(pair))
1765 * ata_port_disable - Disable port.
1766 * @ap: Port to be disabled.
1768 * Modify @ap data structure such that the system
1769 * thinks that the entire port is disabled, and should
1770 * never attempt to probe or communicate with devices
1773 * LOCKING: host_set lock, or some other form of
1777 void ata_port_disable(struct ata_port *ap)
1779 ap->device[0].class = ATA_DEV_NONE;
1780 ap->device[1].class = ATA_DEV_NONE;
1781 ap->flags |= ATA_FLAG_DISABLED;
1785 * sata_down_spd_limit - adjust SATA spd limit downward
1786 * @ap: Port to adjust SATA spd limit for
1788 * Adjust SATA spd limit of @ap downward. Note that this
1789 * function only adjusts the limit. The change must be applied
1790 * using sata_set_spd().
1793 * Inherited from caller.
1796 * 0 on success, negative errno on failure
1798 int sata_down_spd_limit(struct ata_port *ap)
1800 u32 sstatus, spd, mask;
1803 rc = sata_scr_read(ap, SCR_STATUS, &sstatus);
1807 mask = ap->sata_spd_limit;
1810 highbit = fls(mask) - 1;
1811 mask &= ~(1 << highbit);
1813 spd = (sstatus >> 4) & 0xf;
1817 mask &= (1 << spd) - 1;
1821 ap->sata_spd_limit = mask;
1823 ata_port_printk(ap, KERN_WARNING, "limiting SATA link speed to %s\n",
1824 sata_spd_string(fls(mask)));
1829 static int __sata_set_spd_needed(struct ata_port *ap, u32 *scontrol)
1833 if (ap->sata_spd_limit == UINT_MAX)
1836 limit = fls(ap->sata_spd_limit);
1838 spd = (*scontrol >> 4) & 0xf;
1839 *scontrol = (*scontrol & ~0xf0) | ((limit & 0xf) << 4);
1841 return spd != limit;
1845 * sata_set_spd_needed - is SATA spd configuration needed
1846 * @ap: Port in question
1848 * Test whether the spd limit in SControl matches
1849 * @ap->sata_spd_limit. This function is used to determine
1850 * whether hardreset is necessary to apply SATA spd
1854 * Inherited from caller.
1857 * 1 if SATA spd configuration is needed, 0 otherwise.
1859 int sata_set_spd_needed(struct ata_port *ap)
1863 if (sata_scr_read(ap, SCR_CONTROL, &scontrol))
1866 return __sata_set_spd_needed(ap, &scontrol);
1870 * sata_set_spd - set SATA spd according to spd limit
1871 * @ap: Port to set SATA spd for
1873 * Set SATA spd of @ap according to sata_spd_limit.
1876 * Inherited from caller.
1879 * 0 if spd doesn't need to be changed, 1 if spd has been
1880 * changed. Negative errno if SCR registers are inaccessible.
1882 int sata_set_spd(struct ata_port *ap)
1887 if ((rc = sata_scr_read(ap, SCR_CONTROL, &scontrol)))
1890 if (!__sata_set_spd_needed(ap, &scontrol))
1893 if ((rc = sata_scr_write(ap, SCR_CONTROL, scontrol)))
1900 * This mode timing computation functionality is ported over from
1901 * drivers/ide/ide-timing.h and was originally written by Vojtech Pavlik
1904 * PIO 0-5, MWDMA 0-2 and UDMA 0-6 timings (in nanoseconds).
1905 * These were taken from ATA/ATAPI-6 standard, rev 0a, except
1906 * for PIO 5, which is a nonstandard extension and UDMA6, which
1907 * is currently supported only by Maxtor drives.
1910 static const struct ata_timing ata_timing[] = {
1912 { XFER_UDMA_6, 0, 0, 0, 0, 0, 0, 0, 15 },
1913 { XFER_UDMA_5, 0, 0, 0, 0, 0, 0, 0, 20 },
1914 { XFER_UDMA_4, 0, 0, 0, 0, 0, 0, 0, 30 },
1915 { XFER_UDMA_3, 0, 0, 0, 0, 0, 0, 0, 45 },
1917 { XFER_UDMA_2, 0, 0, 0, 0, 0, 0, 0, 60 },
1918 { XFER_UDMA_1, 0, 0, 0, 0, 0, 0, 0, 80 },
1919 { XFER_UDMA_0, 0, 0, 0, 0, 0, 0, 0, 120 },
1921 /* { XFER_UDMA_SLOW, 0, 0, 0, 0, 0, 0, 0, 150 }, */
1923 { XFER_MW_DMA_2, 25, 0, 0, 0, 70, 25, 120, 0 },
1924 { XFER_MW_DMA_1, 45, 0, 0, 0, 80, 50, 150, 0 },
1925 { XFER_MW_DMA_0, 60, 0, 0, 0, 215, 215, 480, 0 },
1927 { XFER_SW_DMA_2, 60, 0, 0, 0, 120, 120, 240, 0 },
1928 { XFER_SW_DMA_1, 90, 0, 0, 0, 240, 240, 480, 0 },
1929 { XFER_SW_DMA_0, 120, 0, 0, 0, 480, 480, 960, 0 },
1931 /* { XFER_PIO_5, 20, 50, 30, 100, 50, 30, 100, 0 }, */
1932 { XFER_PIO_4, 25, 70, 25, 120, 70, 25, 120, 0 },
1933 { XFER_PIO_3, 30, 80, 70, 180, 80, 70, 180, 0 },
1935 { XFER_PIO_2, 30, 290, 40, 330, 100, 90, 240, 0 },
1936 { XFER_PIO_1, 50, 290, 93, 383, 125, 100, 383, 0 },
1937 { XFER_PIO_0, 70, 290, 240, 600, 165, 150, 600, 0 },
1939 /* { XFER_PIO_SLOW, 120, 290, 240, 960, 290, 240, 960, 0 }, */
1944 #define ENOUGH(v,unit) (((v)-1)/(unit)+1)
1945 #define EZ(v,unit) ((v)?ENOUGH(v,unit):0)
1947 static void ata_timing_quantize(const struct ata_timing *t, struct ata_timing *q, int T, int UT)
1949 q->setup = EZ(t->setup * 1000, T);
1950 q->act8b = EZ(t->act8b * 1000, T);
1951 q->rec8b = EZ(t->rec8b * 1000, T);
1952 q->cyc8b = EZ(t->cyc8b * 1000, T);
1953 q->active = EZ(t->active * 1000, T);
1954 q->recover = EZ(t->recover * 1000, T);
1955 q->cycle = EZ(t->cycle * 1000, T);
1956 q->udma = EZ(t->udma * 1000, UT);
1959 void ata_timing_merge(const struct ata_timing *a, const struct ata_timing *b,
1960 struct ata_timing *m, unsigned int what)
1962 if (what & ATA_TIMING_SETUP ) m->setup = max(a->setup, b->setup);
1963 if (what & ATA_TIMING_ACT8B ) m->act8b = max(a->act8b, b->act8b);
1964 if (what & ATA_TIMING_REC8B ) m->rec8b = max(a->rec8b, b->rec8b);
1965 if (what & ATA_TIMING_CYC8B ) m->cyc8b = max(a->cyc8b, b->cyc8b);
1966 if (what & ATA_TIMING_ACTIVE ) m->active = max(a->active, b->active);
1967 if (what & ATA_TIMING_RECOVER) m->recover = max(a->recover, b->recover);
1968 if (what & ATA_TIMING_CYCLE ) m->cycle = max(a->cycle, b->cycle);
1969 if (what & ATA_TIMING_UDMA ) m->udma = max(a->udma, b->udma);
1972 static const struct ata_timing* ata_timing_find_mode(unsigned short speed)
1974 const struct ata_timing *t;
1976 for (t = ata_timing; t->mode != speed; t++)
1977 if (t->mode == 0xFF)
1982 int ata_timing_compute(struct ata_device *adev, unsigned short speed,
1983 struct ata_timing *t, int T, int UT)
1985 const struct ata_timing *s;
1986 struct ata_timing p;
1992 if (!(s = ata_timing_find_mode(speed)))
1995 memcpy(t, s, sizeof(*s));
1998 * If the drive is an EIDE drive, it can tell us it needs extended
1999 * PIO/MW_DMA cycle timing.
2002 if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE drive */
2003 memset(&p, 0, sizeof(p));
2004 if(speed >= XFER_PIO_0 && speed <= XFER_SW_DMA_0) {
2005 if (speed <= XFER_PIO_2) p.cycle = p.cyc8b = adev->id[ATA_ID_EIDE_PIO];
2006 else p.cycle = p.cyc8b = adev->id[ATA_ID_EIDE_PIO_IORDY];
2007 } else if(speed >= XFER_MW_DMA_0 && speed <= XFER_MW_DMA_2) {
2008 p.cycle = adev->id[ATA_ID_EIDE_DMA_MIN];
2010 ata_timing_merge(&p, t, t, ATA_TIMING_CYCLE | ATA_TIMING_CYC8B);
2014 * Convert the timing to bus clock counts.
2017 ata_timing_quantize(t, t, T, UT);
2020 * Even in DMA/UDMA modes we still use PIO access for IDENTIFY,
2021 * S.M.A.R.T * and some other commands. We have to ensure that the
2022 * DMA cycle timing is slower/equal than the fastest PIO timing.
2025 if (speed > XFER_PIO_4) {
2026 ata_timing_compute(adev, adev->pio_mode, &p, T, UT);
2027 ata_timing_merge(&p, t, t, ATA_TIMING_ALL);
2031 * Lengthen active & recovery time so that cycle time is correct.
2034 if (t->act8b + t->rec8b < t->cyc8b) {
2035 t->act8b += (t->cyc8b - (t->act8b + t->rec8b)) / 2;
2036 t->rec8b = t->cyc8b - t->act8b;
2039 if (t->active + t->recover < t->cycle) {
2040 t->active += (t->cycle - (t->active + t->recover)) / 2;
2041 t->recover = t->cycle - t->active;
2048 * ata_down_xfermask_limit - adjust dev xfer masks downward
2049 * @dev: Device to adjust xfer masks
2050 * @force_pio0: Force PIO0
2052 * Adjust xfer masks of @dev downward. Note that this function
2053 * does not apply the change. Invoking ata_set_mode() afterwards
2054 * will apply the limit.
2057 * Inherited from caller.
2060 * 0 on success, negative errno on failure
2062 int ata_down_xfermask_limit(struct ata_device *dev, int force_pio0)
2064 unsigned long xfer_mask;
2067 xfer_mask = ata_pack_xfermask(dev->pio_mask, dev->mwdma_mask,
2072 /* don't gear down to MWDMA from UDMA, go directly to PIO */
2073 if (xfer_mask & ATA_MASK_UDMA)
2074 xfer_mask &= ~ATA_MASK_MWDMA;
2076 highbit = fls(xfer_mask) - 1;
2077 xfer_mask &= ~(1 << highbit);
2079 xfer_mask &= 1 << ATA_SHIFT_PIO;
2083 ata_unpack_xfermask(xfer_mask, &dev->pio_mask, &dev->mwdma_mask,
2086 ata_dev_printk(dev, KERN_WARNING, "limiting speed to %s\n",
2087 ata_mode_string(xfer_mask));
2095 static int ata_dev_set_mode(struct ata_device *dev)
2097 unsigned int err_mask;
2100 dev->flags &= ~ATA_DFLAG_PIO;
2101 if (dev->xfer_shift == ATA_SHIFT_PIO)
2102 dev->flags |= ATA_DFLAG_PIO;
2104 err_mask = ata_dev_set_xfermode(dev);
2106 ata_dev_printk(dev, KERN_ERR, "failed to set xfermode "
2107 "(err_mask=0x%x)\n", err_mask);
2111 rc = ata_dev_revalidate(dev, 0);
2115 DPRINTK("xfer_shift=%u, xfer_mode=0x%x\n",
2116 dev->xfer_shift, (int)dev->xfer_mode);
2118 ata_dev_printk(dev, KERN_INFO, "configured for %s\n",
2119 ata_mode_string(ata_xfer_mode2mask(dev->xfer_mode)));
2124 * ata_set_mode - Program timings and issue SET FEATURES - XFER
2125 * @ap: port on which timings will be programmed
2126 * @r_failed_dev: out paramter for failed device
2128 * Set ATA device disk transfer mode (PIO3, UDMA6, etc.). If
2129 * ata_set_mode() fails, pointer to the failing device is
2130 * returned in @r_failed_dev.
2133 * PCI/etc. bus probe sem.
2136 * 0 on success, negative errno otherwise
2138 int ata_set_mode(struct ata_port *ap, struct ata_device **r_failed_dev)
2140 struct ata_device *dev;
2141 int i, rc = 0, used_dma = 0, found = 0;
2143 /* has private set_mode? */
2144 if (ap->ops->set_mode) {
2145 /* FIXME: make ->set_mode handle no device case and
2146 * return error code and failing device on failure.
2148 for (i = 0; i < ATA_MAX_DEVICES; i++) {
2149 if (ata_dev_ready(&ap->device[i])) {
2150 ap->ops->set_mode(ap);
2157 /* step 1: calculate xfer_mask */
2158 for (i = 0; i < ATA_MAX_DEVICES; i++) {
2159 unsigned int pio_mask, dma_mask;
2161 dev = &ap->device[i];
2163 if (!ata_dev_enabled(dev))
2166 ata_dev_xfermask(dev);
2168 pio_mask = ata_pack_xfermask(dev->pio_mask, 0, 0);
2169 dma_mask = ata_pack_xfermask(0, dev->mwdma_mask, dev->udma_mask);
2170 dev->pio_mode = ata_xfer_mask2mode(pio_mask);
2171 dev->dma_mode = ata_xfer_mask2mode(dma_mask);
2180 /* step 2: always set host PIO timings */
2181 for (i = 0; i < ATA_MAX_DEVICES; i++) {
2182 dev = &ap->device[i];
2183 if (!ata_dev_enabled(dev))
2186 if (!dev->pio_mode) {
2187 ata_dev_printk(dev, KERN_WARNING, "no PIO support\n");
2192 dev->xfer_mode = dev->pio_mode;
2193 dev->xfer_shift = ATA_SHIFT_PIO;
2194 if (ap->ops->set_piomode)
2195 ap->ops->set_piomode(ap, dev);
2198 /* step 3: set host DMA timings */
2199 for (i = 0; i < ATA_MAX_DEVICES; i++) {
2200 dev = &ap->device[i];
2202 if (!ata_dev_enabled(dev) || !dev->dma_mode)
2205 dev->xfer_mode = dev->dma_mode;
2206 dev->xfer_shift = ata_xfer_mode2shift(dev->dma_mode);
2207 if (ap->ops->set_dmamode)
2208 ap->ops->set_dmamode(ap, dev);
2211 /* step 4: update devices' xfer mode */
2212 for (i = 0; i < ATA_MAX_DEVICES; i++) {
2213 dev = &ap->device[i];
2215 /* don't udpate suspended devices' xfer mode */
2216 if (!ata_dev_ready(dev))
2219 rc = ata_dev_set_mode(dev);
2224 /* Record simplex status. If we selected DMA then the other
2225 * host channels are not permitted to do so.
2227 if (used_dma && (ap->host_set->flags & ATA_HOST_SIMPLEX))
2228 ap->host_set->simplex_claimed = 1;
2230 /* step5: chip specific finalisation */
2231 if (ap->ops->post_set_mode)
2232 ap->ops->post_set_mode(ap);
2236 *r_failed_dev = dev;
2241 * ata_tf_to_host - issue ATA taskfile to host controller
2242 * @ap: port to which command is being issued
2243 * @tf: ATA taskfile register set
2245 * Issues ATA taskfile register set to ATA host controller,
2246 * with proper synchronization with interrupt handler and
2250 * spin_lock_irqsave(host_set lock)
2253 static inline void ata_tf_to_host(struct ata_port *ap,
2254 const struct ata_taskfile *tf)
2256 ap->ops->tf_load(ap, tf);
2257 ap->ops->exec_command(ap, tf);
2261 * ata_busy_sleep - sleep until BSY clears, or timeout
2262 * @ap: port containing status register to be polled
2263 * @tmout_pat: impatience timeout
2264 * @tmout: overall timeout
2266 * Sleep until ATA Status register bit BSY clears,
2267 * or a timeout occurs.
2272 unsigned int ata_busy_sleep (struct ata_port *ap,
2273 unsigned long tmout_pat, unsigned long tmout)
2275 unsigned long timer_start, timeout;
2278 status = ata_busy_wait(ap, ATA_BUSY, 300);
2279 timer_start = jiffies;
2280 timeout = timer_start + tmout_pat;
2281 while ((status & ATA_BUSY) && (time_before(jiffies, timeout))) {
2283 status = ata_busy_wait(ap, ATA_BUSY, 3);
2286 if (status & ATA_BUSY)
2287 ata_port_printk(ap, KERN_WARNING,
2288 "port is slow to respond, please be patient\n");
2290 timeout = timer_start + tmout;
2291 while ((status & ATA_BUSY) && (time_before(jiffies, timeout))) {
2293 status = ata_chk_status(ap);
2296 if (status & ATA_BUSY) {
2297 ata_port_printk(ap, KERN_ERR, "port failed to respond "
2298 "(%lu secs)\n", tmout / HZ);
2305 static void ata_bus_post_reset(struct ata_port *ap, unsigned int devmask)
2307 struct ata_ioports *ioaddr = &ap->ioaddr;
2308 unsigned int dev0 = devmask & (1 << 0);
2309 unsigned int dev1 = devmask & (1 << 1);
2310 unsigned long timeout;
2312 /* if device 0 was found in ata_devchk, wait for its
2316 ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT);
2318 /* if device 1 was found in ata_devchk, wait for
2319 * register access, then wait for BSY to clear
2321 timeout = jiffies + ATA_TMOUT_BOOT;
2325 ap->ops->dev_select(ap, 1);
2326 if (ap->flags & ATA_FLAG_MMIO) {
2327 nsect = readb((void __iomem *) ioaddr->nsect_addr);
2328 lbal = readb((void __iomem *) ioaddr->lbal_addr);
2330 nsect = inb(ioaddr->nsect_addr);
2331 lbal = inb(ioaddr->lbal_addr);
2333 if ((nsect == 1) && (lbal == 1))
2335 if (time_after(jiffies, timeout)) {
2339 msleep(50); /* give drive a breather */
2342 ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT);
2344 /* is all this really necessary? */
2345 ap->ops->dev_select(ap, 0);
2347 ap->ops->dev_select(ap, 1);
2349 ap->ops->dev_select(ap, 0);
2352 static unsigned int ata_bus_softreset(struct ata_port *ap,
2353 unsigned int devmask)
2355 struct ata_ioports *ioaddr = &ap->ioaddr;
2357 DPRINTK("ata%u: bus reset via SRST\n", ap->id);
2359 /* software reset. causes dev0 to be selected */
2360 if (ap->flags & ATA_FLAG_MMIO) {
2361 writeb(ap->ctl, (void __iomem *) ioaddr->ctl_addr);
2362 udelay(20); /* FIXME: flush */
2363 writeb(ap->ctl | ATA_SRST, (void __iomem *) ioaddr->ctl_addr);
2364 udelay(20); /* FIXME: flush */
2365 writeb(ap->ctl, (void __iomem *) ioaddr->ctl_addr);
2367 outb(ap->ctl, ioaddr->ctl_addr);
2369 outb(ap->ctl | ATA_SRST, ioaddr->ctl_addr);
2371 outb(ap->ctl, ioaddr->ctl_addr);
2374 /* spec mandates ">= 2ms" before checking status.
2375 * We wait 150ms, because that was the magic delay used for
2376 * ATAPI devices in Hale Landis's ATADRVR, for the period of time
2377 * between when the ATA command register is written, and then
2378 * status is checked. Because waiting for "a while" before
2379 * checking status is fine, post SRST, we perform this magic
2380 * delay here as well.
2382 * Old drivers/ide uses the 2mS rule and then waits for ready
2386 /* Before we perform post reset processing we want to see if
2387 * the bus shows 0xFF because the odd clown forgets the D7
2388 * pulldown resistor.
2390 if (ata_check_status(ap) == 0xFF) {
2391 ata_port_printk(ap, KERN_ERR, "SRST failed (status 0xFF)\n");
2392 return AC_ERR_OTHER;
2395 ata_bus_post_reset(ap, devmask);
2401 * ata_bus_reset - reset host port and associated ATA channel
2402 * @ap: port to reset
2404 * This is typically the first time we actually start issuing
2405 * commands to the ATA channel. We wait for BSY to clear, then
2406 * issue EXECUTE DEVICE DIAGNOSTIC command, polling for its
2407 * result. Determine what devices, if any, are on the channel
2408 * by looking at the device 0/1 error register. Look at the signature
2409 * stored in each device's taskfile registers, to determine if
2410 * the device is ATA or ATAPI.
2413 * PCI/etc. bus probe sem.
2414 * Obtains host_set lock.
2417 * Sets ATA_FLAG_DISABLED if bus reset fails.
2420 void ata_bus_reset(struct ata_port *ap)
2422 struct ata_ioports *ioaddr = &ap->ioaddr;
2423 unsigned int slave_possible = ap->flags & ATA_FLAG_SLAVE_POSS;
2425 unsigned int dev0, dev1 = 0, devmask = 0;
2427 DPRINTK("ENTER, host %u, port %u\n", ap->id, ap->port_no);
2429 /* determine if device 0/1 are present */
2430 if (ap->flags & ATA_FLAG_SATA_RESET)
2433 dev0 = ata_devchk(ap, 0);
2435 dev1 = ata_devchk(ap, 1);
2439 devmask |= (1 << 0);
2441 devmask |= (1 << 1);
2443 /* select device 0 again */
2444 ap->ops->dev_select(ap, 0);
2446 /* issue bus reset */
2447 if (ap->flags & ATA_FLAG_SRST)
2448 if (ata_bus_softreset(ap, devmask))
2452 * determine by signature whether we have ATA or ATAPI devices
2454 ap->device[0].class = ata_dev_try_classify(ap, 0, &err);
2455 if ((slave_possible) && (err != 0x81))
2456 ap->device[1].class = ata_dev_try_classify(ap, 1, &err);
2458 /* re-enable interrupts */
2459 if (ap->ioaddr.ctl_addr) /* FIXME: hack. create a hook instead */
2462 /* is double-select really necessary? */
2463 if (ap->device[1].class != ATA_DEV_NONE)
2464 ap->ops->dev_select(ap, 1);
2465 if (ap->device[0].class != ATA_DEV_NONE)
2466 ap->ops->dev_select(ap, 0);
2468 /* if no devices were detected, disable this port */
2469 if ((ap->device[0].class == ATA_DEV_NONE) &&
2470 (ap->device[1].class == ATA_DEV_NONE))
2473 if (ap->flags & (ATA_FLAG_SATA_RESET | ATA_FLAG_SRST)) {
2474 /* set up device control for ATA_FLAG_SATA_RESET */
2475 if (ap->flags & ATA_FLAG_MMIO)
2476 writeb(ap->ctl, (void __iomem *) ioaddr->ctl_addr);
2478 outb(ap->ctl, ioaddr->ctl_addr);
2485 ata_port_printk(ap, KERN_ERR, "disabling port\n");
2486 ap->ops->port_disable(ap);
2492 * sata_phy_debounce - debounce SATA phy status
2493 * @ap: ATA port to debounce SATA phy status for
2494 * @params: timing parameters { interval, duratinon, timeout } in msec
2496 * Make sure SStatus of @ap reaches stable state, determined by
2497 * holding the same value where DET is not 1 for @duration polled
2498 * every @interval, before @timeout. Timeout constraints the
2499 * beginning of the stable state. Because, after hot unplugging,
2500 * DET gets stuck at 1 on some controllers, this functions waits
2501 * until timeout then returns 0 if DET is stable at 1.
2504 * Kernel thread context (may sleep)
2507 * 0 on success, -errno on failure.
2509 int sata_phy_debounce(struct ata_port *ap, const unsigned long *params)
2511 unsigned long interval_msec = params[0];
2512 unsigned long duration = params[1] * HZ / 1000;
2513 unsigned long timeout = jiffies + params[2] * HZ / 1000;
2514 unsigned long last_jiffies;
2518 if ((rc = sata_scr_read(ap, SCR_STATUS, &cur)))
2523 last_jiffies = jiffies;
2526 msleep(interval_msec);
2527 if ((rc = sata_scr_read(ap, SCR_STATUS, &cur)))
2533 if (cur == 1 && time_before(jiffies, timeout))
2535 if (time_after(jiffies, last_jiffies + duration))
2540 /* unstable, start over */
2542 last_jiffies = jiffies;
2545 if (time_after(jiffies, timeout))
2551 * sata_phy_resume - resume SATA phy
2552 * @ap: ATA port to resume SATA phy for
2553 * @params: timing parameters { interval, duratinon, timeout } in msec
2555 * Resume SATA phy of @ap and debounce it.
2558 * Kernel thread context (may sleep)
2561 * 0 on success, -errno on failure.
2563 int sata_phy_resume(struct ata_port *ap, const unsigned long *params)
2568 if ((rc = sata_scr_read(ap, SCR_CONTROL, &scontrol)))
2571 scontrol = (scontrol & 0x0f0) | 0x300;
2573 if ((rc = sata_scr_write(ap, SCR_CONTROL, scontrol)))
2576 /* Some PHYs react badly if SStatus is pounded immediately
2577 * after resuming. Delay 200ms before debouncing.
2581 return sata_phy_debounce(ap, params);
2584 static void ata_wait_spinup(struct ata_port *ap)
2586 struct ata_eh_context *ehc = &ap->eh_context;
2587 unsigned long end, secs;
2590 /* first, debounce phy if SATA */
2591 if (ap->cbl == ATA_CBL_SATA) {
2592 rc = sata_phy_debounce(ap, sata_deb_timing_hotplug);
2594 /* if debounced successfully and offline, no need to wait */
2595 if ((rc == 0 || rc == -EOPNOTSUPP) && ata_port_offline(ap))
2599 /* okay, let's give the drive time to spin up */
2600 end = ehc->i.hotplug_timestamp + ATA_SPINUP_WAIT * HZ / 1000;
2601 secs = ((end - jiffies) + HZ - 1) / HZ;
2603 if (time_after(jiffies, end))
2607 ata_port_printk(ap, KERN_INFO, "waiting for device to spin up "
2608 "(%lu secs)\n", secs);
2610 schedule_timeout_uninterruptible(end - jiffies);
2614 * ata_std_prereset - prepare for reset
2615 * @ap: ATA port to be reset
2617 * @ap is about to be reset. Initialize it.
2620 * Kernel thread context (may sleep)
2623 * 0 on success, -errno otherwise.
2625 int ata_std_prereset(struct ata_port *ap)
2627 struct ata_eh_context *ehc = &ap->eh_context;
2628 const unsigned long *timing = sata_ehc_deb_timing(ehc);
2631 /* handle link resume & hotplug spinup */
2632 if ((ehc->i.flags & ATA_EHI_RESUME_LINK) &&
2633 (ap->flags & ATA_FLAG_HRST_TO_RESUME))
2634 ehc->i.action |= ATA_EH_HARDRESET;
2636 if ((ehc->i.flags & ATA_EHI_HOTPLUGGED) &&
2637 (ap->flags & ATA_FLAG_SKIP_D2H_BSY))
2638 ata_wait_spinup(ap);
2640 /* if we're about to do hardreset, nothing more to do */
2641 if (ehc->i.action & ATA_EH_HARDRESET)
2644 /* if SATA, resume phy */
2645 if (ap->cbl == ATA_CBL_SATA) {
2646 rc = sata_phy_resume(ap, timing);
2647 if (rc && rc != -EOPNOTSUPP) {
2648 /* phy resume failed */
2649 ata_port_printk(ap, KERN_WARNING, "failed to resume "
2650 "link for reset (errno=%d)\n", rc);
2655 /* Wait for !BSY if the controller can wait for the first D2H
2656 * Reg FIS and we don't know that no device is attached.
2658 if (!(ap->flags & ATA_FLAG_SKIP_D2H_BSY) && !ata_port_offline(ap))
2659 ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT);
2665 * ata_std_softreset - reset host port via ATA SRST
2666 * @ap: port to reset
2667 * @classes: resulting classes of attached devices
2669 * Reset host port using ATA SRST.
2672 * Kernel thread context (may sleep)
2675 * 0 on success, -errno otherwise.
2677 int ata_std_softreset(struct ata_port *ap, unsigned int *classes)
2679 unsigned int slave_possible = ap->flags & ATA_FLAG_SLAVE_POSS;
2680 unsigned int devmask = 0, err_mask;
2685 if (ata_port_offline(ap)) {
2686 classes[0] = ATA_DEV_NONE;
2690 /* determine if device 0/1 are present */
2691 if (ata_devchk(ap, 0))
2692 devmask |= (1 << 0);
2693 if (slave_possible && ata_devchk(ap, 1))
2694 devmask |= (1 << 1);
2696 /* select device 0 again */
2697 ap->ops->dev_select(ap, 0);
2699 /* issue bus reset */
2700 DPRINTK("about to softreset, devmask=%x\n", devmask);
2701 err_mask = ata_bus_softreset(ap, devmask);
2703 ata_port_printk(ap, KERN_ERR, "SRST failed (err_mask=0x%x)\n",
2708 /* determine by signature whether we have ATA or ATAPI devices */
2709 classes[0] = ata_dev_try_classify(ap, 0, &err);
2710 if (slave_possible && err != 0x81)
2711 classes[1] = ata_dev_try_classify(ap, 1, &err);
2714 DPRINTK("EXIT, classes[0]=%u [1]=%u\n", classes[0], classes[1]);
2719 * sata_std_hardreset - reset host port via SATA phy reset
2720 * @ap: port to reset
2721 * @class: resulting class of attached device
2723 * SATA phy-reset host port using DET bits of SControl register.
2726 * Kernel thread context (may sleep)
2729 * 0 on success, -errno otherwise.
2731 int sata_std_hardreset(struct ata_port *ap, unsigned int *class)
2733 struct ata_eh_context *ehc = &ap->eh_context;
2734 const unsigned long *timing = sata_ehc_deb_timing(ehc);
2740 if (sata_set_spd_needed(ap)) {
2741 /* SATA spec says nothing about how to reconfigure
2742 * spd. To be on the safe side, turn off phy during
2743 * reconfiguration. This works for at least ICH7 AHCI
2746 if ((rc = sata_scr_read(ap, SCR_CONTROL, &scontrol)))
2749 scontrol = (scontrol & 0x0f0) | 0x302;
2751 if ((rc = sata_scr_write(ap, SCR_CONTROL, scontrol)))
2757 /* issue phy wake/reset */
2758 if ((rc = sata_scr_read(ap, SCR_CONTROL, &scontrol)))
2761 scontrol = (scontrol & 0x0f0) | 0x301;
2763 if ((rc = sata_scr_write_flush(ap, SCR_CONTROL, scontrol)))
2766 /* Couldn't find anything in SATA I/II specs, but AHCI-1.1
2767 * 10.4.2 says at least 1 ms.
2771 /* bring phy back */
2772 sata_phy_resume(ap, timing);
2774 /* TODO: phy layer with polling, timeouts, etc. */
2775 if (ata_port_offline(ap)) {
2776 *class = ATA_DEV_NONE;
2777 DPRINTK("EXIT, link offline\n");
2781 if (ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT)) {
2782 ata_port_printk(ap, KERN_ERR,
2783 "COMRESET failed (device not ready)\n");
2787 ap->ops->dev_select(ap, 0); /* probably unnecessary */
2789 *class = ata_dev_try_classify(ap, 0, NULL);
2791 DPRINTK("EXIT, class=%u\n", *class);
2796 * ata_std_postreset - standard postreset callback
2797 * @ap: the target ata_port
2798 * @classes: classes of attached devices
2800 * This function is invoked after a successful reset. Note that
2801 * the device might have been reset more than once using
2802 * different reset methods before postreset is invoked.
2805 * Kernel thread context (may sleep)
2807 void ata_std_postreset(struct ata_port *ap, unsigned int *classes)
2813 /* print link status */
2814 sata_print_link_status(ap);
2817 if (sata_scr_read(ap, SCR_ERROR, &serror) == 0)
2818 sata_scr_write(ap, SCR_ERROR, serror);
2820 /* re-enable interrupts */
2821 if (!ap->ops->error_handler) {
2822 /* FIXME: hack. create a hook instead */
2823 if (ap->ioaddr.ctl_addr)
2827 /* is double-select really necessary? */
2828 if (classes[0] != ATA_DEV_NONE)
2829 ap->ops->dev_select(ap, 1);
2830 if (classes[1] != ATA_DEV_NONE)
2831 ap->ops->dev_select(ap, 0);
2833 /* bail out if no device is present */
2834 if (classes[0] == ATA_DEV_NONE && classes[1] == ATA_DEV_NONE) {
2835 DPRINTK("EXIT, no device\n");
2839 /* set up device control */
2840 if (ap->ioaddr.ctl_addr) {
2841 if (ap->flags & ATA_FLAG_MMIO)
2842 writeb(ap->ctl, (void __iomem *) ap->ioaddr.ctl_addr);
2844 outb(ap->ctl, ap->ioaddr.ctl_addr);
2851 * ata_dev_same_device - Determine whether new ID matches configured device
2852 * @dev: device to compare against
2853 * @new_class: class of the new device
2854 * @new_id: IDENTIFY page of the new device
2856 * Compare @new_class and @new_id against @dev and determine
2857 * whether @dev is the device indicated by @new_class and
2864 * 1 if @dev matches @new_class and @new_id, 0 otherwise.
2866 static int ata_dev_same_device(struct ata_device *dev, unsigned int new_class,
2869 const u16 *old_id = dev->id;
2870 unsigned char model[2][41], serial[2][21];
2873 if (dev->class != new_class) {
2874 ata_dev_printk(dev, KERN_INFO, "class mismatch %d != %d\n",
2875 dev->class, new_class);
2879 ata_id_c_string(old_id, model[0], ATA_ID_PROD_OFS, sizeof(model[0]));
2880 ata_id_c_string(new_id, model[1], ATA_ID_PROD_OFS, sizeof(model[1]));
2881 ata_id_c_string(old_id, serial[0], ATA_ID_SERNO_OFS, sizeof(serial[0]));
2882 ata_id_c_string(new_id, serial[1], ATA_ID_SERNO_OFS, sizeof(serial[1]));
2883 new_n_sectors = ata_id_n_sectors(new_id);
2885 if (strcmp(model[0], model[1])) {
2886 ata_dev_printk(dev, KERN_INFO, "model number mismatch "
2887 "'%s' != '%s'\n", model[0], model[1]);
2891 if (strcmp(serial[0], serial[1])) {
2892 ata_dev_printk(dev, KERN_INFO, "serial number mismatch "
2893 "'%s' != '%s'\n", serial[0], serial[1]);
2897 if (dev->class == ATA_DEV_ATA && dev->n_sectors != new_n_sectors) {
2898 ata_dev_printk(dev, KERN_INFO, "n_sectors mismatch "
2900 (unsigned long long)dev->n_sectors,
2901 (unsigned long long)new_n_sectors);
2909 * ata_dev_revalidate - Revalidate ATA device
2910 * @dev: device to revalidate
2911 * @post_reset: is this revalidation after reset?
2913 * Re-read IDENTIFY page and make sure @dev is still attached to
2917 * Kernel thread context (may sleep)
2920 * 0 on success, negative errno otherwise
2922 int ata_dev_revalidate(struct ata_device *dev, int post_reset)
2924 unsigned int class = dev->class;
2925 u16 *id = (void *)dev->ap->sector_buf;
2928 if (!ata_dev_enabled(dev)) {
2934 rc = ata_dev_read_id(dev, &class, post_reset, id);
2938 /* is the device still there? */
2939 if (!ata_dev_same_device(dev, class, id)) {
2944 memcpy(dev->id, id, sizeof(id[0]) * ATA_ID_WORDS);
2946 /* configure device according to the new ID */
2947 rc = ata_dev_configure(dev, 0);
2952 ata_dev_printk(dev, KERN_ERR, "revalidation failed (errno=%d)\n", rc);
2956 static const char * const ata_dma_blacklist [] = {
2957 "WDC AC11000H", NULL,
2958 "WDC AC22100H", NULL,
2959 "WDC AC32500H", NULL,
2960 "WDC AC33100H", NULL,
2961 "WDC AC31600H", NULL,
2962 "WDC AC32100H", "24.09P07",
2963 "WDC AC23200L", "21.10N21",
2964 "Compaq CRD-8241B", NULL,
2969 "SanDisk SDP3B", NULL,
2970 "SanDisk SDP3B-64", NULL,
2971 "SANYO CD-ROM CRD", NULL,
2972 "HITACHI CDR-8", NULL,
2973 "HITACHI CDR-8335", NULL,
2974 "HITACHI CDR-8435", NULL,
2975 "Toshiba CD-ROM XM-6202B", NULL,
2976 "TOSHIBA CD-ROM XM-1702BC", NULL,
2978 "E-IDE CD-ROM CR-840", NULL,
2979 "CD-ROM Drive/F5A", NULL,
2980 "WPI CDD-820", NULL,
2981 "SAMSUNG CD-ROM SC-148C", NULL,
2982 "SAMSUNG CD-ROM SC", NULL,
2983 "SanDisk SDP3B-64", NULL,
2984 "ATAPI CD-ROM DRIVE 40X MAXIMUM",NULL,
2985 "_NEC DV5800A", NULL,
2986 "SAMSUNG CD-ROM SN-124", "N001"
2989 static int ata_strim(char *s, size_t len)
2991 len = strnlen(s, len);
2993 /* ATAPI specifies that empty space is blank-filled; remove blanks */
2994 while ((len > 0) && (s[len - 1] == ' ')) {
3001 static int ata_dma_blacklisted(const struct ata_device *dev)
3003 unsigned char model_num[40];
3004 unsigned char model_rev[16];
3005 unsigned int nlen, rlen;
3008 /* We don't support polling DMA.
3009 * DMA blacklist those ATAPI devices with CDB-intr (and use PIO)
3010 * if the LLDD handles only interrupts in the HSM_ST_LAST state.
3012 if ((dev->ap->flags & ATA_FLAG_PIO_POLLING) &&
3013 (dev->flags & ATA_DFLAG_CDB_INTR))
3016 ata_id_string(dev->id, model_num, ATA_ID_PROD_OFS,
3018 ata_id_string(dev->id, model_rev, ATA_ID_FW_REV_OFS,
3020 nlen = ata_strim(model_num, sizeof(model_num));
3021 rlen = ata_strim(model_rev, sizeof(model_rev));
3023 for (i = 0; i < ARRAY_SIZE(ata_dma_blacklist); i += 2) {
3024 if (!strncmp(ata_dma_blacklist[i], model_num, nlen)) {
3025 if (ata_dma_blacklist[i+1] == NULL)
3027 if (!strncmp(ata_dma_blacklist[i], model_rev, rlen))
3035 * ata_dev_xfermask - Compute supported xfermask of the given device
3036 * @dev: Device to compute xfermask for
3038 * Compute supported xfermask of @dev and store it in
3039 * dev->*_mask. This function is responsible for applying all
3040 * known limits including host controller limits, device
3043 * FIXME: The current implementation limits all transfer modes to
3044 * the fastest of the lowested device on the port. This is not
3045 * required on most controllers.
3050 static void ata_dev_xfermask(struct ata_device *dev)
3052 struct ata_port *ap = dev->ap;
3053 struct ata_host_set *hs = ap->host_set;
3054 unsigned long xfer_mask;
3057 xfer_mask = ata_pack_xfermask(ap->pio_mask,
3058 ap->mwdma_mask, ap->udma_mask);
3060 /* Apply cable rule here. Don't apply it early because when
3061 * we handle hot plug the cable type can itself change.
3063 if (ap->cbl == ATA_CBL_PATA40)
3064 xfer_mask &= ~(0xF8 << ATA_SHIFT_UDMA);
3066 /* FIXME: Use port-wide xfermask for now */
3067 for (i = 0; i < ATA_MAX_DEVICES; i++) {
3068 struct ata_device *d = &ap->device[i];
3070 if (ata_dev_absent(d))
3073 if (ata_dev_disabled(d)) {
3074 /* to avoid violating device selection timing */
3075 xfer_mask &= ata_pack_xfermask(d->pio_mask,
3076 UINT_MAX, UINT_MAX);
3080 xfer_mask &= ata_pack_xfermask(d->pio_mask,
3081 d->mwdma_mask, d->udma_mask);
3082 xfer_mask &= ata_id_xfermask(d->id);
3083 if (ata_dma_blacklisted(d))
3084 xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA);
3087 if (ata_dma_blacklisted(dev))
3088 ata_dev_printk(dev, KERN_WARNING,
3089 "device is on DMA blacklist, disabling DMA\n");
3091 if (hs->flags & ATA_HOST_SIMPLEX) {
3092 if (hs->simplex_claimed)
3093 xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA);
3096 if (ap->ops->mode_filter)
3097 xfer_mask = ap->ops->mode_filter(ap, dev, xfer_mask);
3099 ata_unpack_xfermask(xfer_mask, &dev->pio_mask,
3100 &dev->mwdma_mask, &dev->udma_mask);
3104 * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command
3105 * @dev: Device to which command will be sent
3107 * Issue SET FEATURES - XFER MODE command to device @dev
3111 * PCI/etc. bus probe sem.
3114 * 0 on success, AC_ERR_* mask otherwise.
3117 static unsigned int ata_dev_set_xfermode(struct ata_device *dev)
3119 struct ata_taskfile tf;
3120 unsigned int err_mask;
3122 /* set up set-features taskfile */
3123 DPRINTK("set features - xfer mode\n");
3125 ata_tf_init(dev, &tf);
3126 tf.command = ATA_CMD_SET_FEATURES;
3127 tf.feature = SETFEATURES_XFER;
3128 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
3129 tf.protocol = ATA_PROT_NODATA;
3130 tf.nsect = dev->xfer_mode;
3132 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0);
3134 DPRINTK("EXIT, err_mask=%x\n", err_mask);
3139 * ata_dev_init_params - Issue INIT DEV PARAMS command
3140 * @dev: Device to which command will be sent
3141 * @heads: Number of heads (taskfile parameter)
3142 * @sectors: Number of sectors (taskfile parameter)
3145 * Kernel thread context (may sleep)
3148 * 0 on success, AC_ERR_* mask otherwise.
3150 static unsigned int ata_dev_init_params(struct ata_device *dev,
3151 u16 heads, u16 sectors)
3153 struct ata_taskfile tf;
3154 unsigned int err_mask;
3156 /* Number of sectors per track 1-255. Number of heads 1-16 */
3157 if (sectors < 1 || sectors > 255 || heads < 1 || heads > 16)
3158 return AC_ERR_INVALID;
3160 /* set up init dev params taskfile */
3161 DPRINTK("init dev params \n");
3163 ata_tf_init(dev, &tf);
3164 tf.command = ATA_CMD_INIT_DEV_PARAMS;
3165 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
3166 tf.protocol = ATA_PROT_NODATA;
3168 tf.device |= (heads - 1) & 0x0f; /* max head = num. of heads - 1 */
3170 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0);
3172 DPRINTK("EXIT, err_mask=%x\n", err_mask);
3177 * ata_sg_clean - Unmap DMA memory associated with command
3178 * @qc: Command containing DMA memory to be released
3180 * Unmap all mapped DMA memory associated with this command.
3183 * spin_lock_irqsave(host_set lock)
3186 static void ata_sg_clean(struct ata_queued_cmd *qc)
3188 struct ata_port *ap = qc->ap;
3189 struct scatterlist *sg = qc->__sg;
3190 int dir = qc->dma_dir;
3191 void *pad_buf = NULL;
3193 WARN_ON(!(qc->flags & ATA_QCFLAG_DMAMAP));
3194 WARN_ON(sg == NULL);
3196 if (qc->flags & ATA_QCFLAG_SINGLE)
3197 WARN_ON(qc->n_elem > 1);
3199 VPRINTK("unmapping %u sg elements\n", qc->n_elem);
3201 /* if we padded the buffer out to 32-bit bound, and data
3202 * xfer direction is from-device, we must copy from the
3203 * pad buffer back into the supplied buffer
3205 if (qc->pad_len && !(qc->tf.flags & ATA_TFLAG_WRITE))
3206 pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ);
3208 if (qc->flags & ATA_QCFLAG_SG) {
3210 dma_unmap_sg(ap->dev, sg, qc->n_elem, dir);
3211 /* restore last sg */
3212 sg[qc->orig_n_elem - 1].length += qc->pad_len;
3214 struct scatterlist *psg = &qc->pad_sgent;
3215 void *addr = kmap_atomic(psg->page, KM_IRQ0);
3216 memcpy(addr + psg->offset, pad_buf, qc->pad_len);
3217 kunmap_atomic(addr, KM_IRQ0);
3221 dma_unmap_single(ap->dev,
3222 sg_dma_address(&sg[0]), sg_dma_len(&sg[0]),
3225 sg->length += qc->pad_len;
3227 memcpy(qc->buf_virt + sg->length - qc->pad_len,
3228 pad_buf, qc->pad_len);
3231 qc->flags &= ~ATA_QCFLAG_DMAMAP;
3236 * ata_fill_sg - Fill PCI IDE PRD table
3237 * @qc: Metadata associated with taskfile to be transferred
3239 * Fill PCI IDE PRD (scatter-gather) table with segments
3240 * associated with the current disk command.
3243 * spin_lock_irqsave(host_set lock)
3246 static void ata_fill_sg(struct ata_queued_cmd *qc)
3248 struct ata_port *ap = qc->ap;
3249 struct scatterlist *sg;
3252 WARN_ON(qc->__sg == NULL);
3253 WARN_ON(qc->n_elem == 0 && qc->pad_len == 0);
3256 ata_for_each_sg(sg, qc) {
3260 /* determine if physical DMA addr spans 64K boundary.
3261 * Note h/w doesn't support 64-bit, so we unconditionally
3262 * truncate dma_addr_t to u32.
3264 addr = (u32) sg_dma_address(sg);
3265 sg_len = sg_dma_len(sg);
3268 offset = addr & 0xffff;
3270 if ((offset + sg_len) > 0x10000)
3271 len = 0x10000 - offset;
3273 ap->prd[idx].addr = cpu_to_le32(addr);
3274 ap->prd[idx].flags_len = cpu_to_le32(len & 0xffff);
3275 VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", idx, addr, len);
3284 ap->prd[idx - 1].flags_len |= cpu_to_le32(ATA_PRD_EOT);
3287 * ata_check_atapi_dma - Check whether ATAPI DMA can be supported
3288 * @qc: Metadata associated with taskfile to check
3290 * Allow low-level driver to filter ATA PACKET commands, returning
3291 * a status indicating whether or not it is OK to use DMA for the
3292 * supplied PACKET command.
3295 * spin_lock_irqsave(host_set lock)
3297 * RETURNS: 0 when ATAPI DMA can be used
3300 int ata_check_atapi_dma(struct ata_queued_cmd *qc)
3302 struct ata_port *ap = qc->ap;
3303 int rc = 0; /* Assume ATAPI DMA is OK by default */
3305 if (ap->ops->check_atapi_dma)
3306 rc = ap->ops->check_atapi_dma(qc);
3311 * ata_qc_prep - Prepare taskfile for submission
3312 * @qc: Metadata associated with taskfile to be prepared
3314 * Prepare ATA taskfile for submission.
3317 * spin_lock_irqsave(host_set lock)
3319 void ata_qc_prep(struct ata_queued_cmd *qc)
3321 if (!(qc->flags & ATA_QCFLAG_DMAMAP))
3327 void ata_noop_qc_prep(struct ata_queued_cmd *qc) { }
3330 * ata_sg_init_one - Associate command with memory buffer
3331 * @qc: Command to be associated
3332 * @buf: Memory buffer
3333 * @buflen: Length of memory buffer, in bytes.
3335 * Initialize the data-related elements of queued_cmd @qc
3336 * to point to a single memory buffer, @buf of byte length @buflen.
3339 * spin_lock_irqsave(host_set lock)
3342 void ata_sg_init_one(struct ata_queued_cmd *qc, void *buf, unsigned int buflen)
3344 struct scatterlist *sg;
3346 qc->flags |= ATA_QCFLAG_SINGLE;
3348 memset(&qc->sgent, 0, sizeof(qc->sgent));
3349 qc->__sg = &qc->sgent;
3351 qc->orig_n_elem = 1;
3353 qc->nbytes = buflen;
3356 sg_init_one(sg, buf, buflen);
3360 * ata_sg_init - Associate command with scatter-gather table.
3361 * @qc: Command to be associated
3362 * @sg: Scatter-gather table.
3363 * @n_elem: Number of elements in s/g table.
3365 * Initialize the data-related elements of queued_cmd @qc
3366 * to point to a scatter-gather table @sg, containing @n_elem
3370 * spin_lock_irqsave(host_set lock)
3373 void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
3374 unsigned int n_elem)
3376 qc->flags |= ATA_QCFLAG_SG;
3378 qc->n_elem = n_elem;
3379 qc->orig_n_elem = n_elem;
3383 * ata_sg_setup_one - DMA-map the memory buffer associated with a command.
3384 * @qc: Command with memory buffer to be mapped.
3386 * DMA-map the memory buffer associated with queued_cmd @qc.
3389 * spin_lock_irqsave(host_set lock)
3392 * Zero on success, negative on error.
3395 static int ata_sg_setup_one(struct ata_queued_cmd *qc)
3397 struct ata_port *ap = qc->ap;
3398 int dir = qc->dma_dir;
3399 struct scatterlist *sg = qc->__sg;
3400 dma_addr_t dma_address;
3403 /* we must lengthen transfers to end on a 32-bit boundary */
3404 qc->pad_len = sg->length & 3;
3406 void *pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ);
3407 struct scatterlist *psg = &qc->pad_sgent;
3409 WARN_ON(qc->dev->class != ATA_DEV_ATAPI);
3411 memset(pad_buf, 0, ATA_DMA_PAD_SZ);
3413 if (qc->tf.flags & ATA_TFLAG_WRITE)
3414 memcpy(pad_buf, qc->buf_virt + sg->length - qc->pad_len,
3417 sg_dma_address(psg) = ap->pad_dma + (qc->tag * ATA_DMA_PAD_SZ);
3418 sg_dma_len(psg) = ATA_DMA_PAD_SZ;
3420 sg->length -= qc->pad_len;
3421 if (sg->length == 0)
3424 DPRINTK("padding done, sg->length=%u pad_len=%u\n",
3425 sg->length, qc->pad_len);
3433 dma_address = dma_map_single(ap->dev, qc->buf_virt,
3435 if (dma_mapping_error(dma_address)) {
3437 sg->length += qc->pad_len;
3441 sg_dma_address(sg) = dma_address;
3442 sg_dma_len(sg) = sg->length;
3445 DPRINTK("mapped buffer of %d bytes for %s\n", sg_dma_len(sg),
3446 qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read");
3452 * ata_sg_setup - DMA-map the scatter-gather table associated with a command.
3453 * @qc: Command with scatter-gather table to be mapped.
3455 * DMA-map the scatter-gather table associated with queued_cmd @qc.
3458 * spin_lock_irqsave(host_set lock)
3461 * Zero on success, negative on error.
3465 static int ata_sg_setup(struct ata_queued_cmd *qc)
3467 struct ata_port *ap = qc->ap;
3468 struct scatterlist *sg = qc->__sg;
3469 struct scatterlist *lsg = &sg[qc->n_elem - 1];
3470 int n_elem, pre_n_elem, dir, trim_sg = 0;
3472 VPRINTK("ENTER, ata%u\n", ap->id);
3473 WARN_ON(!(qc->flags & ATA_QCFLAG_SG));
3475 /* we must lengthen transfers to end on a 32-bit boundary */
3476 qc->pad_len = lsg->length & 3;
3478 void *pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ);
3479 struct scatterlist *psg = &qc->pad_sgent;
3480 unsigned int offset;
3482 WARN_ON(qc->dev->class != ATA_DEV_ATAPI);
3484 memset(pad_buf, 0, ATA_DMA_PAD_SZ);
3487 * psg->page/offset are used to copy to-be-written
3488 * data in this function or read data in ata_sg_clean.
3490 offset = lsg->offset + lsg->length - qc->pad_len;
3491 psg->page = nth_page(lsg->page, offset >> PAGE_SHIFT);
3492 psg->offset = offset_in_page(offset);
3494 if (qc->tf.flags & ATA_TFLAG_WRITE) {
3495 void *addr = kmap_atomic(psg->page, KM_IRQ0);
3496 memcpy(pad_buf, addr + psg->offset, qc->pad_len);
3497 kunmap_atomic(addr, KM_IRQ0);
3500 sg_dma_address(psg) = ap->pad_dma + (qc->tag * ATA_DMA_PAD_SZ);
3501 sg_dma_len(psg) = ATA_DMA_PAD_SZ;
3503 lsg->length -= qc->pad_len;
3504 if (lsg->length == 0)
3507 DPRINTK("padding done, sg[%d].length=%u pad_len=%u\n",
3508 qc->n_elem - 1, lsg->length, qc->pad_len);
3511 pre_n_elem = qc->n_elem;
3512 if (trim_sg && pre_n_elem)
3521 n_elem = dma_map_sg(ap->dev, sg, pre_n_elem, dir);
3523 /* restore last sg */
3524 lsg->length += qc->pad_len;
3528 DPRINTK("%d sg elements mapped\n", n_elem);
3531 qc->n_elem = n_elem;
3537 * swap_buf_le16 - swap halves of 16-bit words in place
3538 * @buf: Buffer to swap
3539 * @buf_words: Number of 16-bit words in buffer.
3541 * Swap halves of 16-bit words if needed to convert from
3542 * little-endian byte order to native cpu byte order, or
3546 * Inherited from caller.
3548 void swap_buf_le16(u16 *buf, unsigned int buf_words)
3553 for (i = 0; i < buf_words; i++)
3554 buf[i] = le16_to_cpu(buf[i]);
3555 #endif /* __BIG_ENDIAN */
3559 * ata_mmio_data_xfer - Transfer data by MMIO
3560 * @adev: device for this I/O
3562 * @buflen: buffer length
3563 * @write_data: read/write
3565 * Transfer data from/to the device data register by MMIO.
3568 * Inherited from caller.
3571 void ata_mmio_data_xfer(struct ata_device *adev, unsigned char *buf,
3572 unsigned int buflen, int write_data)
3574 struct ata_port *ap = adev->ap;
3576 unsigned int words = buflen >> 1;
3577 u16 *buf16 = (u16 *) buf;
3578 void __iomem *mmio = (void __iomem *)ap->ioaddr.data_addr;
3580 /* Transfer multiple of 2 bytes */
3582 for (i = 0; i < words; i++)
3583 writew(le16_to_cpu(buf16[i]), mmio);
3585 for (i = 0; i < words; i++)
3586 buf16[i] = cpu_to_le16(readw(mmio));
3589 /* Transfer trailing 1 byte, if any. */
3590 if (unlikely(buflen & 0x01)) {
3591 u16 align_buf[1] = { 0 };
3592 unsigned char *trailing_buf = buf + buflen - 1;
3595 memcpy(align_buf, trailing_buf, 1);
3596 writew(le16_to_cpu(align_buf[0]), mmio);
3598 align_buf[0] = cpu_to_le16(readw(mmio));
3599 memcpy(trailing_buf, align_buf, 1);
3605 * ata_pio_data_xfer - Transfer data by PIO
3606 * @adev: device to target
3608 * @buflen: buffer length
3609 * @write_data: read/write
3611 * Transfer data from/to the device data register by PIO.
3614 * Inherited from caller.
3617 void ata_pio_data_xfer(struct ata_device *adev, unsigned char *buf,
3618 unsigned int buflen, int write_data)
3620 struct ata_port *ap = adev->ap;
3621 unsigned int words = buflen >> 1;
3623 /* Transfer multiple of 2 bytes */
3625 outsw(ap->ioaddr.data_addr, buf, words);
3627 insw(ap->ioaddr.data_addr, buf, words);
3629 /* Transfer trailing 1 byte, if any. */
3630 if (unlikely(buflen & 0x01)) {
3631 u16 align_buf[1] = { 0 };
3632 unsigned char *trailing_buf = buf + buflen - 1;
3635 memcpy(align_buf, trailing_buf, 1);
3636 outw(le16_to_cpu(align_buf[0]), ap->ioaddr.data_addr);
3638 align_buf[0] = cpu_to_le16(inw(ap->ioaddr.data_addr));
3639 memcpy(trailing_buf, align_buf, 1);
3645 * ata_pio_data_xfer_noirq - Transfer data by PIO
3646 * @adev: device to target
3648 * @buflen: buffer length
3649 * @write_data: read/write
3651 * Transfer data from/to the device data register by PIO. Do the
3652 * transfer with interrupts disabled.
3655 * Inherited from caller.
3658 void ata_pio_data_xfer_noirq(struct ata_device *adev, unsigned char *buf,
3659 unsigned int buflen, int write_data)
3661 unsigned long flags;
3662 local_irq_save(flags);
3663 ata_pio_data_xfer(adev, buf, buflen, write_data);
3664 local_irq_restore(flags);
3669 * ata_pio_sector - Transfer ATA_SECT_SIZE (512 bytes) of data.
3670 * @qc: Command on going
3672 * Transfer ATA_SECT_SIZE of data from/to the ATA device.
3675 * Inherited from caller.
3678 static void ata_pio_sector(struct ata_queued_cmd *qc)
3680 int do_write = (qc->tf.flags & ATA_TFLAG_WRITE);
3681 struct scatterlist *sg = qc->__sg;
3682 struct ata_port *ap = qc->ap;
3684 unsigned int offset;
3687 if (qc->cursect == (qc->nsect - 1))
3688 ap->hsm_task_state = HSM_ST_LAST;
3690 page = sg[qc->cursg].page;
3691 offset = sg[qc->cursg].offset + qc->cursg_ofs * ATA_SECT_SIZE;
3693 /* get the current page and offset */
3694 page = nth_page(page, (offset >> PAGE_SHIFT));
3695 offset %= PAGE_SIZE;
3697 DPRINTK("data %s\n", qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read");
3699 if (PageHighMem(page)) {
3700 unsigned long flags;
3702 /* FIXME: use a bounce buffer */
3703 local_irq_save(flags);
3704 buf = kmap_atomic(page, KM_IRQ0);
3706 /* do the actual data transfer */
3707 ap->ops->data_xfer(qc->dev, buf + offset, ATA_SECT_SIZE, do_write);
3709 kunmap_atomic(buf, KM_IRQ0);
3710 local_irq_restore(flags);
3712 buf = page_address(page);
3713 ap->ops->data_xfer(qc->dev, buf + offset, ATA_SECT_SIZE, do_write);
3719 if ((qc->cursg_ofs * ATA_SECT_SIZE) == (&sg[qc->cursg])->length) {
3726 * ata_pio_sectors - Transfer one or many 512-byte sectors.
3727 * @qc: Command on going
3729 * Transfer one or many ATA_SECT_SIZE of data from/to the
3730 * ATA device for the DRQ request.
3733 * Inherited from caller.
3736 static void ata_pio_sectors(struct ata_queued_cmd *qc)
3738 if (is_multi_taskfile(&qc->tf)) {
3739 /* READ/WRITE MULTIPLE */
3742 WARN_ON(qc->dev->multi_count == 0);
3744 nsect = min(qc->nsect - qc->cursect, qc->dev->multi_count);
3752 * atapi_send_cdb - Write CDB bytes to hardware
3753 * @ap: Port to which ATAPI device is attached.
3754 * @qc: Taskfile currently active
3756 * When device has indicated its readiness to accept
3757 * a CDB, this function is called. Send the CDB.
3763 static void atapi_send_cdb(struct ata_port *ap, struct ata_queued_cmd *qc)
3766 DPRINTK("send cdb\n");
3767 WARN_ON(qc->dev->cdb_len < 12);
3769 ap->ops->data_xfer(qc->dev, qc->cdb, qc->dev->cdb_len, 1);
3770 ata_altstatus(ap); /* flush */
3772 switch (qc->tf.protocol) {
3773 case ATA_PROT_ATAPI:
3774 ap->hsm_task_state = HSM_ST;
3776 case ATA_PROT_ATAPI_NODATA:
3777 ap->hsm_task_state = HSM_ST_LAST;
3779 case ATA_PROT_ATAPI_DMA:
3780 ap->hsm_task_state = HSM_ST_LAST;
3781 /* initiate bmdma */
3782 ap->ops->bmdma_start(qc);
3788 * __atapi_pio_bytes - Transfer data from/to the ATAPI device.
3789 * @qc: Command on going
3790 * @bytes: number of bytes
3792 * Transfer Transfer data from/to the ATAPI device.
3795 * Inherited from caller.
3799 static void __atapi_pio_bytes(struct ata_queued_cmd *qc, unsigned int bytes)
3801 int do_write = (qc->tf.flags & ATA_TFLAG_WRITE);
3802 struct scatterlist *sg = qc->__sg;
3803 struct ata_port *ap = qc->ap;
3806 unsigned int offset, count;
3808 if (qc->curbytes + bytes >= qc->nbytes)
3809 ap->hsm_task_state = HSM_ST_LAST;
3812 if (unlikely(qc->cursg >= qc->n_elem)) {
3814 * The end of qc->sg is reached and the device expects
3815 * more data to transfer. In order not to overrun qc->sg
3816 * and fulfill length specified in the byte count register,
3817 * - for read case, discard trailing data from the device
3818 * - for write case, padding zero data to the device
3820 u16 pad_buf[1] = { 0 };
3821 unsigned int words = bytes >> 1;
3824 if (words) /* warning if bytes > 1 */
3825 ata_dev_printk(qc->dev, KERN_WARNING,
3826 "%u bytes trailing data\n", bytes);
3828 for (i = 0; i < words; i++)
3829 ap->ops->data_xfer(qc->dev, (unsigned char*)pad_buf, 2, do_write);
3831 ap->hsm_task_state = HSM_ST_LAST;
3835 sg = &qc->__sg[qc->cursg];
3838 offset = sg->offset + qc->cursg_ofs;
3840 /* get the current page and offset */
3841 page = nth_page(page, (offset >> PAGE_SHIFT));
3842 offset %= PAGE_SIZE;
3844 /* don't overrun current sg */
3845 count = min(sg->length - qc->cursg_ofs, bytes);
3847 /* don't cross page boundaries */
3848 count = min(count, (unsigned int)PAGE_SIZE - offset);
3850 DPRINTK("data %s\n", qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read");
3852 if (PageHighMem(page)) {
3853 unsigned long flags;
3855 /* FIXME: use bounce buffer */
3856 local_irq_save(flags);
3857 buf = kmap_atomic(page, KM_IRQ0);
3859 /* do the actual data transfer */
3860 ap->ops->data_xfer(qc->dev, buf + offset, count, do_write);
3862 kunmap_atomic(buf, KM_IRQ0);
3863 local_irq_restore(flags);
3865 buf = page_address(page);
3866 ap->ops->data_xfer(qc->dev, buf + offset, count, do_write);
3870 qc->curbytes += count;
3871 qc->cursg_ofs += count;
3873 if (qc->cursg_ofs == sg->length) {
3883 * atapi_pio_bytes - Transfer data from/to the ATAPI device.
3884 * @qc: Command on going
3886 * Transfer Transfer data from/to the ATAPI device.
3889 * Inherited from caller.
3892 static void atapi_pio_bytes(struct ata_queued_cmd *qc)
3894 struct ata_port *ap = qc->ap;
3895 struct ata_device *dev = qc->dev;
3896 unsigned int ireason, bc_lo, bc_hi, bytes;
3897 int i_write, do_write = (qc->tf.flags & ATA_TFLAG_WRITE) ? 1 : 0;
3899 /* Abuse qc->result_tf for temp storage of intermediate TF
3900 * here to save some kernel stack usage.
3901 * For normal completion, qc->result_tf is not relevant. For
3902 * error, qc->result_tf is later overwritten by ata_qc_complete().
3903 * So, the correctness of qc->result_tf is not affected.
3905 ap->ops->tf_read(ap, &qc->result_tf);
3906 ireason = qc->result_tf.nsect;
3907 bc_lo = qc->result_tf.lbam;
3908 bc_hi = qc->result_tf.lbah;
3909 bytes = (bc_hi << 8) | bc_lo;
3911 /* shall be cleared to zero, indicating xfer of data */
3912 if (ireason & (1 << 0))
3915 /* make sure transfer direction matches expected */
3916 i_write = ((ireason & (1 << 1)) == 0) ? 1 : 0;
3917 if (do_write != i_write)
3920 VPRINTK("ata%u: xfering %d bytes\n", ap->id, bytes);
3922 __atapi_pio_bytes(qc, bytes);
3927 ata_dev_printk(dev, KERN_INFO, "ATAPI check failed\n");
3928 qc->err_mask |= AC_ERR_HSM;
3929 ap->hsm_task_state = HSM_ST_ERR;
3933 * ata_hsm_ok_in_wq - Check if the qc can be handled in the workqueue.
3934 * @ap: the target ata_port
3938 * 1 if ok in workqueue, 0 otherwise.
3941 static inline int ata_hsm_ok_in_wq(struct ata_port *ap, struct ata_queued_cmd *qc)
3943 if (qc->tf.flags & ATA_TFLAG_POLLING)
3946 if (ap->hsm_task_state == HSM_ST_FIRST) {
3947 if (qc->tf.protocol == ATA_PROT_PIO &&
3948 (qc->tf.flags & ATA_TFLAG_WRITE))
3951 if (is_atapi_taskfile(&qc->tf) &&
3952 !(qc->dev->flags & ATA_DFLAG_CDB_INTR))
3960 * ata_hsm_qc_complete - finish a qc running on standard HSM
3961 * @qc: Command to complete
3962 * @in_wq: 1 if called from workqueue, 0 otherwise
3964 * Finish @qc which is running on standard HSM.
3967 * If @in_wq is zero, spin_lock_irqsave(host_set lock).
3968 * Otherwise, none on entry and grabs host lock.
3970 static void ata_hsm_qc_complete(struct ata_queued_cmd *qc, int in_wq)
3972 struct ata_port *ap = qc->ap;
3973 unsigned long flags;
3975 if (ap->ops->error_handler) {
3977 spin_lock_irqsave(ap->lock, flags);
3979 /* EH might have kicked in while host_set lock
3982 qc = ata_qc_from_tag(ap, qc->tag);
3984 if (likely(!(qc->err_mask & AC_ERR_HSM))) {
3986 ata_qc_complete(qc);
3988 ata_port_freeze(ap);
3991 spin_unlock_irqrestore(ap->lock, flags);
3993 if (likely(!(qc->err_mask & AC_ERR_HSM)))
3994 ata_qc_complete(qc);
3996 ata_port_freeze(ap);
4000 spin_lock_irqsave(ap->lock, flags);
4002 ata_qc_complete(qc);
4003 spin_unlock_irqrestore(ap->lock, flags);
4005 ata_qc_complete(qc);
4008 ata_altstatus(ap); /* flush */
4012 * ata_hsm_move - move the HSM to the next state.
4013 * @ap: the target ata_port
4015 * @status: current device status
4016 * @in_wq: 1 if called from workqueue, 0 otherwise
4019 * 1 when poll next status needed, 0 otherwise.
4021 int ata_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc,
4022 u8 status, int in_wq)
4024 unsigned long flags = 0;
4027 WARN_ON((qc->flags & ATA_QCFLAG_ACTIVE) == 0);
4029 /* Make sure ata_qc_issue_prot() does not throw things
4030 * like DMA polling into the workqueue. Notice that
4031 * in_wq is not equivalent to (qc->tf.flags & ATA_TFLAG_POLLING).
4033 WARN_ON(in_wq != ata_hsm_ok_in_wq(ap, qc));
4036 DPRINTK("ata%u: protocol %d task_state %d (dev_stat 0x%X)\n",
4037 ap->id, qc->tf.protocol, ap->hsm_task_state, status);
4039 switch (ap->hsm_task_state) {
4041 /* Send first data block or PACKET CDB */
4043 /* If polling, we will stay in the work queue after
4044 * sending the data. Otherwise, interrupt handler
4045 * takes over after sending the data.
4047 poll_next = (qc->tf.flags & ATA_TFLAG_POLLING);
4049 /* check device status */
4050 if (unlikely((status & ATA_DRQ) == 0)) {
4051 /* handle BSY=0, DRQ=0 as error */
4052 if (likely(status & (ATA_ERR | ATA_DF)))
4053 /* device stops HSM for abort/error */
4054 qc->err_mask |= AC_ERR_DEV;
4056 /* HSM violation. Let EH handle this */
4057 qc->err_mask |= AC_ERR_HSM;
4059 ap->hsm_task_state = HSM_ST_ERR;
4063 /* Device should not ask for data transfer (DRQ=1)
4064 * when it finds something wrong.
4065 * We ignore DRQ here and stop the HSM by
4066 * changing hsm_task_state to HSM_ST_ERR and
4067 * let the EH abort the command or reset the device.
4069 if (unlikely(status & (ATA_ERR | ATA_DF))) {
4070 printk(KERN_WARNING "ata%d: DRQ=1 with device error, dev_stat 0x%X\n",
4072 qc->err_mask |= AC_ERR_HSM;
4073 ap->hsm_task_state = HSM_ST_ERR;
4077 /* Send the CDB (atapi) or the first data block (ata pio out).
4078 * During the state transition, interrupt handler shouldn't
4079 * be invoked before the data transfer is complete and
4080 * hsm_task_state is changed. Hence, the following locking.
4083 spin_lock_irqsave(ap->lock, flags);
4085 if (qc->tf.protocol == ATA_PROT_PIO) {
4086 /* PIO data out protocol.
4087 * send first data block.
4090 /* ata_pio_sectors() might change the state
4091 * to HSM_ST_LAST. so, the state is changed here
4092 * before ata_pio_sectors().
4094 ap->hsm_task_state = HSM_ST;
4095 ata_pio_sectors(qc);
4096 ata_altstatus(ap); /* flush */
4099 atapi_send_cdb(ap, qc);
4102 spin_unlock_irqrestore(ap->lock, flags);
4104 /* if polling, ata_pio_task() handles the rest.
4105 * otherwise, interrupt handler takes over from here.
4110 /* complete command or read/write the data register */
4111 if (qc->tf.protocol == ATA_PROT_ATAPI) {
4112 /* ATAPI PIO protocol */
4113 if ((status & ATA_DRQ) == 0) {
4114 /* No more data to transfer or device error.
4115 * Device error will be tagged in HSM_ST_LAST.
4117 ap->hsm_task_state = HSM_ST_LAST;
4121 /* Device should not ask for data transfer (DRQ=1)
4122 * when it finds something wrong.
4123 * We ignore DRQ here and stop the HSM by
4124 * changing hsm_task_state to HSM_ST_ERR and
4125 * let the EH abort the command or reset the device.
4127 if (unlikely(status & (ATA_ERR | ATA_DF))) {
4128 printk(KERN_WARNING "ata%d: DRQ=1 with device error, dev_stat 0x%X\n",
4130 qc->err_mask |= AC_ERR_HSM;
4131 ap->hsm_task_state = HSM_ST_ERR;
4135 atapi_pio_bytes(qc);
4137 if (unlikely(ap->hsm_task_state == HSM_ST_ERR))
4138 /* bad ireason reported by device */
4142 /* ATA PIO protocol */
4143 if (unlikely((status & ATA_DRQ) == 0)) {
4144 /* handle BSY=0, DRQ=0 as error */
4145 if (likely(status & (ATA_ERR | ATA_DF)))
4146 /* device stops HSM for abort/error */
4147 qc->err_mask |= AC_ERR_DEV;
4149 /* HSM violation. Let EH handle this */
4150 qc->err_mask |= AC_ERR_HSM;
4152 ap->hsm_task_state = HSM_ST_ERR;
4156 /* For PIO reads, some devices may ask for
4157 * data transfer (DRQ=1) alone with ERR=1.
4158 * We respect DRQ here and transfer one
4159 * block of junk data before changing the
4160 * hsm_task_state to HSM_ST_ERR.
4162 * For PIO writes, ERR=1 DRQ=1 doesn't make
4163 * sense since the data block has been
4164 * transferred to the device.
4166 if (unlikely(status & (ATA_ERR | ATA_DF))) {
4167 /* data might be corrputed */
4168 qc->err_mask |= AC_ERR_DEV;
4170 if (!(qc->tf.flags & ATA_TFLAG_WRITE)) {
4171 ata_pio_sectors(qc);
4173 status = ata_wait_idle(ap);
4176 if (status & (ATA_BUSY | ATA_DRQ))
4177 qc->err_mask |= AC_ERR_HSM;
4179 /* ata_pio_sectors() might change the
4180 * state to HSM_ST_LAST. so, the state
4181 * is changed after ata_pio_sectors().
4183 ap->hsm_task_state = HSM_ST_ERR;
4187 ata_pio_sectors(qc);
4189 if (ap->hsm_task_state == HSM_ST_LAST &&
4190 (!(qc->tf.flags & ATA_TFLAG_WRITE))) {
4193 status = ata_wait_idle(ap);
4198 ata_altstatus(ap); /* flush */
4203 if (unlikely(!ata_ok(status))) {
4204 qc->err_mask |= __ac_err_mask(status);
4205 ap->hsm_task_state = HSM_ST_ERR;
4209 /* no more data to transfer */
4210 DPRINTK("ata%u: dev %u command complete, drv_stat 0x%x\n",
4211 ap->id, qc->dev->devno, status);
4213 WARN_ON(qc->err_mask);
4215 ap->hsm_task_state = HSM_ST_IDLE;
4217 /* complete taskfile transaction */
4218 ata_hsm_qc_complete(qc, in_wq);
4224 /* make sure qc->err_mask is available to
4225 * know what's wrong and recover
4227 WARN_ON(qc->err_mask == 0);
4229 ap->hsm_task_state = HSM_ST_IDLE;
4231 /* complete taskfile transaction */
4232 ata_hsm_qc_complete(qc, in_wq);
4244 static void ata_pio_task(void *_data)
4246 struct ata_queued_cmd *qc = _data;
4247 struct ata_port *ap = qc->ap;
4252 WARN_ON(ap->hsm_task_state == HSM_ST_IDLE);
4255 * This is purely heuristic. This is a fast path.
4256 * Sometimes when we enter, BSY will be cleared in
4257 * a chk-status or two. If not, the drive is probably seeking
4258 * or something. Snooze for a couple msecs, then
4259 * chk-status again. If still busy, queue delayed work.
4261 status = ata_busy_wait(ap, ATA_BUSY, 5);
4262 if (status & ATA_BUSY) {
4264 status = ata_busy_wait(ap, ATA_BUSY, 10);
4265 if (status & ATA_BUSY) {
4266 ata_port_queue_task(ap, ata_pio_task, qc, ATA_SHORT_PAUSE);
4272 poll_next = ata_hsm_move(ap, qc, status, 1);
4274 /* another command or interrupt handler
4275 * may be running at this point.
4282 * ata_qc_new - Request an available ATA command, for queueing
4283 * @ap: Port associated with device @dev
4284 * @dev: Device from whom we request an available command structure
4290 static struct ata_queued_cmd *ata_qc_new(struct ata_port *ap)
4292 struct ata_queued_cmd *qc = NULL;
4295 /* no command while frozen */
4296 if (unlikely(ap->pflags & ATA_PFLAG_FROZEN))
4299 /* the last tag is reserved for internal command. */
4300 for (i = 0; i < ATA_MAX_QUEUE - 1; i++)
4301 if (!test_and_set_bit(i, &ap->qc_allocated)) {
4302 qc = __ata_qc_from_tag(ap, i);
4313 * ata_qc_new_init - Request an available ATA command, and initialize it
4314 * @dev: Device from whom we request an available command structure
4320 struct ata_queued_cmd *ata_qc_new_init(struct ata_device *dev)
4322 struct ata_port *ap = dev->ap;
4323 struct ata_queued_cmd *qc;
4325 qc = ata_qc_new(ap);
4338 * ata_qc_free - free unused ata_queued_cmd
4339 * @qc: Command to complete
4341 * Designed to free unused ata_queued_cmd object
4342 * in case something prevents using it.
4345 * spin_lock_irqsave(host_set lock)
4347 void ata_qc_free(struct ata_queued_cmd *qc)
4349 struct ata_port *ap = qc->ap;
4352 WARN_ON(qc == NULL); /* ata_qc_from_tag _might_ return NULL */
4356 if (likely(ata_tag_valid(tag))) {
4357 qc->tag = ATA_TAG_POISON;
4358 clear_bit(tag, &ap->qc_allocated);
4362 void __ata_qc_complete(struct ata_queued_cmd *qc)
4364 struct ata_port *ap = qc->ap;
4366 WARN_ON(qc == NULL); /* ata_qc_from_tag _might_ return NULL */
4367 WARN_ON(!(qc->flags & ATA_QCFLAG_ACTIVE));
4369 if (likely(qc->flags & ATA_QCFLAG_DMAMAP))
4372 /* command should be marked inactive atomically with qc completion */
4373 if (qc->tf.protocol == ATA_PROT_NCQ)
4374 ap->sactive &= ~(1 << qc->tag);
4376 ap->active_tag = ATA_TAG_POISON;
4378 /* atapi: mark qc as inactive to prevent the interrupt handler
4379 * from completing the command twice later, before the error handler
4380 * is called. (when rc != 0 and atapi request sense is needed)
4382 qc->flags &= ~ATA_QCFLAG_ACTIVE;
4383 ap->qc_active &= ~(1 << qc->tag);
4385 /* call completion callback */
4386 qc->complete_fn(qc);
4390 * ata_qc_complete - Complete an active ATA command
4391 * @qc: Command to complete
4392 * @err_mask: ATA Status register contents
4394 * Indicate to the mid and upper layers that an ATA
4395 * command has completed, with either an ok or not-ok status.
4398 * spin_lock_irqsave(host_set lock)
4400 void ata_qc_complete(struct ata_queued_cmd *qc)
4402 struct ata_port *ap = qc->ap;
4404 /* XXX: New EH and old EH use different mechanisms to
4405 * synchronize EH with regular execution path.
4407 * In new EH, a failed qc is marked with ATA_QCFLAG_FAILED.
4408 * Normal execution path is responsible for not accessing a
4409 * failed qc. libata core enforces the rule by returning NULL
4410 * from ata_qc_from_tag() for failed qcs.
4412 * Old EH depends on ata_qc_complete() nullifying completion
4413 * requests if ATA_QCFLAG_EH_SCHEDULED is set. Old EH does
4414 * not synchronize with interrupt handler. Only PIO task is
4417 if (ap->ops->error_handler) {
4418 WARN_ON(ap->pflags & ATA_PFLAG_FROZEN);
4420 if (unlikely(qc->err_mask))
4421 qc->flags |= ATA_QCFLAG_FAILED;
4423 if (unlikely(qc->flags & ATA_QCFLAG_FAILED)) {
4424 if (!ata_tag_internal(qc->tag)) {
4425 /* always fill result TF for failed qc */
4426 ap->ops->tf_read(ap, &qc->result_tf);
4427 ata_qc_schedule_eh(qc);
4432 /* read result TF if requested */
4433 if (qc->flags & ATA_QCFLAG_RESULT_TF)
4434 ap->ops->tf_read(ap, &qc->result_tf);
4436 __ata_qc_complete(qc);
4438 if (qc->flags & ATA_QCFLAG_EH_SCHEDULED)
4441 /* read result TF if failed or requested */
4442 if (qc->err_mask || qc->flags & ATA_QCFLAG_RESULT_TF)
4443 ap->ops->tf_read(ap, &qc->result_tf);
4445 __ata_qc_complete(qc);
4450 * ata_qc_complete_multiple - Complete multiple qcs successfully
4451 * @ap: port in question
4452 * @qc_active: new qc_active mask
4453 * @finish_qc: LLDD callback invoked before completing a qc
4455 * Complete in-flight commands. This functions is meant to be
4456 * called from low-level driver's interrupt routine to complete
4457 * requests normally. ap->qc_active and @qc_active is compared
4458 * and commands are completed accordingly.
4461 * spin_lock_irqsave(host_set lock)
4464 * Number of completed commands on success, -errno otherwise.
4466 int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active,
4467 void (*finish_qc)(struct ata_queued_cmd *))
4473 done_mask = ap->qc_active ^ qc_active;
4475 if (unlikely(done_mask & qc_active)) {
4476 ata_port_printk(ap, KERN_ERR, "illegal qc_active transition "
4477 "(%08x->%08x)\n", ap->qc_active, qc_active);
4481 for (i = 0; i < ATA_MAX_QUEUE; i++) {
4482 struct ata_queued_cmd *qc;
4484 if (!(done_mask & (1 << i)))
4487 if ((qc = ata_qc_from_tag(ap, i))) {
4490 ata_qc_complete(qc);
4498 static inline int ata_should_dma_map(struct ata_queued_cmd *qc)
4500 struct ata_port *ap = qc->ap;
4502 switch (qc->tf.protocol) {
4505 case ATA_PROT_ATAPI_DMA:
4508 case ATA_PROT_ATAPI:
4510 if (ap->flags & ATA_FLAG_PIO_DMA)
4523 * ata_qc_issue - issue taskfile to device
4524 * @qc: command to issue to device
4526 * Prepare an ATA command to submission to device.
4527 * This includes mapping the data into a DMA-able
4528 * area, filling in the S/G table, and finally
4529 * writing the taskfile to hardware, starting the command.
4532 * spin_lock_irqsave(host_set lock)
4534 void ata_qc_issue(struct ata_queued_cmd *qc)
4536 struct ata_port *ap = qc->ap;
4538 /* Make sure only one non-NCQ command is outstanding. The
4539 * check is skipped for old EH because it reuses active qc to
4540 * request ATAPI sense.
4542 WARN_ON(ap->ops->error_handler && ata_tag_valid(ap->active_tag));
4544 if (qc->tf.protocol == ATA_PROT_NCQ) {
4545 WARN_ON(ap->sactive & (1 << qc->tag));
4546 ap->sactive |= 1 << qc->tag;
4548 WARN_ON(ap->sactive);
4549 ap->active_tag = qc->tag;
4552 qc->flags |= ATA_QCFLAG_ACTIVE;
4553 ap->qc_active |= 1 << qc->tag;
4555 if (ata_should_dma_map(qc)) {
4556 if (qc->flags & ATA_QCFLAG_SG) {
4557 if (ata_sg_setup(qc))
4559 } else if (qc->flags & ATA_QCFLAG_SINGLE) {
4560 if (ata_sg_setup_one(qc))
4564 qc->flags &= ~ATA_QCFLAG_DMAMAP;
4567 ap->ops->qc_prep(qc);
4569 qc->err_mask |= ap->ops->qc_issue(qc);
4570 if (unlikely(qc->err_mask))
4575 qc->flags &= ~ATA_QCFLAG_DMAMAP;
4576 qc->err_mask |= AC_ERR_SYSTEM;
4578 ata_qc_complete(qc);
4582 * ata_qc_issue_prot - issue taskfile to device in proto-dependent manner
4583 * @qc: command to issue to device
4585 * Using various libata functions and hooks, this function
4586 * starts an ATA command. ATA commands are grouped into
4587 * classes called "protocols", and issuing each type of protocol
4588 * is slightly different.
4590 * May be used as the qc_issue() entry in ata_port_operations.
4593 * spin_lock_irqsave(host_set lock)
4596 * Zero on success, AC_ERR_* mask on failure
4599 unsigned int ata_qc_issue_prot(struct ata_queued_cmd *qc)
4601 struct ata_port *ap = qc->ap;
4603 /* Use polling pio if the LLD doesn't handle
4604 * interrupt driven pio and atapi CDB interrupt.
4606 if (ap->flags & ATA_FLAG_PIO_POLLING) {
4607 switch (qc->tf.protocol) {
4609 case ATA_PROT_ATAPI:
4610 case ATA_PROT_ATAPI_NODATA:
4611 qc->tf.flags |= ATA_TFLAG_POLLING;
4613 case ATA_PROT_ATAPI_DMA:
4614 if (qc->dev->flags & ATA_DFLAG_CDB_INTR)
4615 /* see ata_dma_blacklisted() */
4623 /* select the device */
4624 ata_dev_select(ap, qc->dev->devno, 1, 0);
4626 /* start the command */
4627 switch (qc->tf.protocol) {
4628 case ATA_PROT_NODATA:
4629 if (qc->tf.flags & ATA_TFLAG_POLLING)
4630 ata_qc_set_polling(qc);
4632 ata_tf_to_host(ap, &qc->tf);
4633 ap->hsm_task_state = HSM_ST_LAST;
4635 if (qc->tf.flags & ATA_TFLAG_POLLING)
4636 ata_port_queue_task(ap, ata_pio_task, qc, 0);
4641 WARN_ON(qc->tf.flags & ATA_TFLAG_POLLING);
4643 ap->ops->tf_load(ap, &qc->tf); /* load tf registers */
4644 ap->ops->bmdma_setup(qc); /* set up bmdma */
4645 ap->ops->bmdma_start(qc); /* initiate bmdma */
4646 ap->hsm_task_state = HSM_ST_LAST;
4650 if (qc->tf.flags & ATA_TFLAG_POLLING)
4651 ata_qc_set_polling(qc);
4653 ata_tf_to_host(ap, &qc->tf);
4655 if (qc->tf.flags & ATA_TFLAG_WRITE) {
4656 /* PIO data out protocol */
4657 ap->hsm_task_state = HSM_ST_FIRST;
4658 ata_port_queue_task(ap, ata_pio_task, qc, 0);
4660 /* always send first data block using
4661 * the ata_pio_task() codepath.
4664 /* PIO data in protocol */
4665 ap->hsm_task_state = HSM_ST;
4667 if (qc->tf.flags & ATA_TFLAG_POLLING)
4668 ata_port_queue_task(ap, ata_pio_task, qc, 0);
4670 /* if polling, ata_pio_task() handles the rest.
4671 * otherwise, interrupt handler takes over from here.
4677 case ATA_PROT_ATAPI:
4678 case ATA_PROT_ATAPI_NODATA:
4679 if (qc->tf.flags & ATA_TFLAG_POLLING)
4680 ata_qc_set_polling(qc);
4682 ata_tf_to_host(ap, &qc->tf);
4684 ap->hsm_task_state = HSM_ST_FIRST;
4686 /* send cdb by polling if no cdb interrupt */
4687 if ((!(qc->dev->flags & ATA_DFLAG_CDB_INTR)) ||
4688 (qc->tf.flags & ATA_TFLAG_POLLING))
4689 ata_port_queue_task(ap, ata_pio_task, qc, 0);
4692 case ATA_PROT_ATAPI_DMA:
4693 WARN_ON(qc->tf.flags & ATA_TFLAG_POLLING);
4695 ap->ops->tf_load(ap, &qc->tf); /* load tf registers */
4696 ap->ops->bmdma_setup(qc); /* set up bmdma */
4697 ap->hsm_task_state = HSM_ST_FIRST;
4699 /* send cdb by polling if no cdb interrupt */
4700 if (!(qc->dev->flags & ATA_DFLAG_CDB_INTR))
4701 ata_port_queue_task(ap, ata_pio_task, qc, 0);
4706 return AC_ERR_SYSTEM;
4713 * ata_host_intr - Handle host interrupt for given (port, task)
4714 * @ap: Port on which interrupt arrived (possibly...)
4715 * @qc: Taskfile currently active in engine
4717 * Handle host interrupt for given queued command. Currently,
4718 * only DMA interrupts are handled. All other commands are
4719 * handled via polling with interrupts disabled (nIEN bit).
4722 * spin_lock_irqsave(host_set lock)
4725 * One if interrupt was handled, zero if not (shared irq).
4728 inline unsigned int ata_host_intr (struct ata_port *ap,
4729 struct ata_queued_cmd *qc)
4731 u8 status, host_stat = 0;
4733 VPRINTK("ata%u: protocol %d task_state %d\n",
4734 ap->id, qc->tf.protocol, ap->hsm_task_state);
4736 /* Check whether we are expecting interrupt in this state */
4737 switch (ap->hsm_task_state) {
4739 /* Some pre-ATAPI-4 devices assert INTRQ
4740 * at this state when ready to receive CDB.
4743 /* Check the ATA_DFLAG_CDB_INTR flag is enough here.
4744 * The flag was turned on only for atapi devices.
4745 * No need to check is_atapi_taskfile(&qc->tf) again.
4747 if (!(qc->dev->flags & ATA_DFLAG_CDB_INTR))
4751 if (qc->tf.protocol == ATA_PROT_DMA ||
4752 qc->tf.protocol == ATA_PROT_ATAPI_DMA) {
4753 /* check status of DMA engine */
4754 host_stat = ap->ops->bmdma_status(ap);
4755 VPRINTK("ata%u: host_stat 0x%X\n", ap->id, host_stat);
4757 /* if it's not our irq... */
4758 if (!(host_stat & ATA_DMA_INTR))
4761 /* before we do anything else, clear DMA-Start bit */
4762 ap->ops->bmdma_stop(qc);
4764 if (unlikely(host_stat & ATA_DMA_ERR)) {
4765 /* error when transfering data to/from memory */
4766 qc->err_mask |= AC_ERR_HOST_BUS;
4767 ap->hsm_task_state = HSM_ST_ERR;
4777 /* check altstatus */
4778 status = ata_altstatus(ap);
4779 if (status & ATA_BUSY)
4782 /* check main status, clearing INTRQ */
4783 status = ata_chk_status(ap);
4784 if (unlikely(status & ATA_BUSY))
4787 /* ack bmdma irq events */
4788 ap->ops->irq_clear(ap);
4790 ata_hsm_move(ap, qc, status, 0);
4791 return 1; /* irq handled */
4794 ap->stats.idle_irq++;
4797 if ((ap->stats.idle_irq % 1000) == 0) {
4798 ata_irq_ack(ap, 0); /* debug trap */
4799 ata_port_printk(ap, KERN_WARNING, "irq trap\n");
4803 return 0; /* irq not handled */
4807 * ata_interrupt - Default ATA host interrupt handler
4808 * @irq: irq line (unused)
4809 * @dev_instance: pointer to our ata_host_set information structure
4812 * Default interrupt handler for PCI IDE devices. Calls
4813 * ata_host_intr() for each port that is not disabled.
4816 * Obtains host_set lock during operation.
4819 * IRQ_NONE or IRQ_HANDLED.
4822 irqreturn_t ata_interrupt (int irq, void *dev_instance, struct pt_regs *regs)
4824 struct ata_host_set *host_set = dev_instance;
4826 unsigned int handled = 0;
4827 unsigned long flags;
4829 /* TODO: make _irqsave conditional on x86 PCI IDE legacy mode */
4830 spin_lock_irqsave(&host_set->lock, flags);
4832 for (i = 0; i < host_set->n_ports; i++) {
4833 struct ata_port *ap;
4835 ap = host_set->ports[i];
4837 !(ap->flags & ATA_FLAG_DISABLED)) {
4838 struct ata_queued_cmd *qc;
4840 qc = ata_qc_from_tag(ap, ap->active_tag);
4841 if (qc && (!(qc->tf.flags & ATA_TFLAG_POLLING)) &&
4842 (qc->flags & ATA_QCFLAG_ACTIVE))
4843 handled |= ata_host_intr(ap, qc);
4847 spin_unlock_irqrestore(&host_set->lock, flags);
4849 return IRQ_RETVAL(handled);
4853 * sata_scr_valid - test whether SCRs are accessible
4854 * @ap: ATA port to test SCR accessibility for
4856 * Test whether SCRs are accessible for @ap.
4862 * 1 if SCRs are accessible, 0 otherwise.
4864 int sata_scr_valid(struct ata_port *ap)
4866 return ap->cbl == ATA_CBL_SATA && ap->ops->scr_read;
4870 * sata_scr_read - read SCR register of the specified port
4871 * @ap: ATA port to read SCR for
4873 * @val: Place to store read value
4875 * Read SCR register @reg of @ap into *@val. This function is
4876 * guaranteed to succeed if the cable type of the port is SATA
4877 * and the port implements ->scr_read.
4883 * 0 on success, negative errno on failure.
4885 int sata_scr_read(struct ata_port *ap, int reg, u32 *val)
4887 if (sata_scr_valid(ap)) {
4888 *val = ap->ops->scr_read(ap, reg);
4895 * sata_scr_write - write SCR register of the specified port
4896 * @ap: ATA port to write SCR for
4897 * @reg: SCR to write
4898 * @val: value to write
4900 * Write @val to SCR register @reg of @ap. This function is
4901 * guaranteed to succeed if the cable type of the port is SATA
4902 * and the port implements ->scr_read.
4908 * 0 on success, negative errno on failure.
4910 int sata_scr_write(struct ata_port *ap, int reg, u32 val)
4912 if (sata_scr_valid(ap)) {
4913 ap->ops->scr_write(ap, reg, val);
4920 * sata_scr_write_flush - write SCR register of the specified port and flush
4921 * @ap: ATA port to write SCR for
4922 * @reg: SCR to write
4923 * @val: value to write
4925 * This function is identical to sata_scr_write() except that this
4926 * function performs flush after writing to the register.
4932 * 0 on success, negative errno on failure.
4934 int sata_scr_write_flush(struct ata_port *ap, int reg, u32 val)
4936 if (sata_scr_valid(ap)) {
4937 ap->ops->scr_write(ap, reg, val);
4938 ap->ops->scr_read(ap, reg);
4945 * ata_port_online - test whether the given port is online
4946 * @ap: ATA port to test
4948 * Test whether @ap is online. Note that this function returns 0
4949 * if online status of @ap cannot be obtained, so
4950 * ata_port_online(ap) != !ata_port_offline(ap).
4956 * 1 if the port online status is available and online.
4958 int ata_port_online(struct ata_port *ap)
4962 if (!sata_scr_read(ap, SCR_STATUS, &sstatus) && (sstatus & 0xf) == 0x3)
4968 * ata_port_offline - test whether the given port is offline
4969 * @ap: ATA port to test
4971 * Test whether @ap is offline. Note that this function returns
4972 * 0 if offline status of @ap cannot be obtained, so
4973 * ata_port_online(ap) != !ata_port_offline(ap).
4979 * 1 if the port offline status is available and offline.
4981 int ata_port_offline(struct ata_port *ap)
4985 if (!sata_scr_read(ap, SCR_STATUS, &sstatus) && (sstatus & 0xf) != 0x3)
4990 int ata_flush_cache(struct ata_device *dev)
4992 unsigned int err_mask;
4995 if (!ata_try_flush_cache(dev))
4998 if (ata_id_has_flush_ext(dev->id))
4999 cmd = ATA_CMD_FLUSH_EXT;
5001 cmd = ATA_CMD_FLUSH;
5003 err_mask = ata_do_simple_cmd(dev, cmd);
5005 ata_dev_printk(dev, KERN_ERR, "failed to flush cache\n");
5012 static int ata_host_set_request_pm(struct ata_host_set *host_set,
5013 pm_message_t mesg, unsigned int action,
5014 unsigned int ehi_flags, int wait)
5016 unsigned long flags;
5019 for (i = 0; i < host_set->n_ports; i++) {
5020 struct ata_port *ap = host_set->ports[i];
5022 /* Previous resume operation might still be in
5023 * progress. Wait for PM_PENDING to clear.
5025 if (ap->pflags & ATA_PFLAG_PM_PENDING) {
5026 ata_port_wait_eh(ap);
5027 WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING);
5030 /* request PM ops to EH */
5031 spin_lock_irqsave(ap->lock, flags);
5036 ap->pm_result = &rc;
5039 ap->pflags |= ATA_PFLAG_PM_PENDING;
5040 ap->eh_info.action |= action;
5041 ap->eh_info.flags |= ehi_flags;
5043 ata_port_schedule_eh(ap);
5045 spin_unlock_irqrestore(ap->lock, flags);
5047 /* wait and check result */
5049 ata_port_wait_eh(ap);
5050 WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING);
5060 * ata_host_set_suspend - suspend host_set
5061 * @host_set: host_set to suspend
5064 * Suspend @host_set. Actual operation is performed by EH. This
5065 * function requests EH to perform PM operations and waits for EH
5069 * Kernel thread context (may sleep).
5072 * 0 on success, -errno on failure.
5074 int ata_host_set_suspend(struct ata_host_set *host_set, pm_message_t mesg)
5078 rc = ata_host_set_request_pm(host_set, mesg, 0, ATA_EHI_QUIET, 1);
5082 /* EH is quiescent now. Fail if we have any ready device.
5083 * This happens if hotplug occurs between completion of device
5084 * suspension and here.
5086 for (i = 0; i < host_set->n_ports; i++) {
5087 struct ata_port *ap = host_set->ports[i];
5089 for (j = 0; j < ATA_MAX_DEVICES; j++) {
5090 struct ata_device *dev = &ap->device[j];
5092 if (ata_dev_ready(dev)) {
5093 ata_port_printk(ap, KERN_WARNING,
5094 "suspend failed, device %d "
5095 "still active\n", dev->devno);
5102 host_set->dev->power.power_state = mesg;
5106 ata_host_set_resume(host_set);
5111 * ata_host_set_resume - resume host_set
5112 * @host_set: host_set to resume
5114 * Resume @host_set. Actual operation is performed by EH. This
5115 * function requests EH to perform PM operations and returns.
5116 * Note that all resume operations are performed parallely.
5119 * Kernel thread context (may sleep).
5121 void ata_host_set_resume(struct ata_host_set *host_set)
5123 ata_host_set_request_pm(host_set, PMSG_ON, ATA_EH_SOFTRESET,
5124 ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET, 0);
5125 host_set->dev->power.power_state = PMSG_ON;
5129 * ata_port_start - Set port up for dma.
5130 * @ap: Port to initialize
5132 * Called just after data structures for each port are
5133 * initialized. Allocates space for PRD table.
5135 * May be used as the port_start() entry in ata_port_operations.
5138 * Inherited from caller.
5141 int ata_port_start (struct ata_port *ap)
5143 struct device *dev = ap->dev;
5146 ap->prd = dma_alloc_coherent(dev, ATA_PRD_TBL_SZ, &ap->prd_dma, GFP_KERNEL);
5150 rc = ata_pad_alloc(ap, dev);
5152 dma_free_coherent(dev, ATA_PRD_TBL_SZ, ap->prd, ap->prd_dma);
5156 DPRINTK("prd alloc, virt %p, dma %llx\n", ap->prd, (unsigned long long) ap->prd_dma);
5163 * ata_port_stop - Undo ata_port_start()
5164 * @ap: Port to shut down
5166 * Frees the PRD table.
5168 * May be used as the port_stop() entry in ata_port_operations.
5171 * Inherited from caller.
5174 void ata_port_stop (struct ata_port *ap)
5176 struct device *dev = ap->dev;
5178 dma_free_coherent(dev, ATA_PRD_TBL_SZ, ap->prd, ap->prd_dma);
5179 ata_pad_free(ap, dev);
5182 void ata_host_stop (struct ata_host_set *host_set)
5184 if (host_set->mmio_base)
5185 iounmap(host_set->mmio_base);
5189 * ata_dev_init - Initialize an ata_device structure
5190 * @dev: Device structure to initialize
5192 * Initialize @dev in preparation for probing.
5195 * Inherited from caller.
5197 void ata_dev_init(struct ata_device *dev)
5199 struct ata_port *ap = dev->ap;
5200 unsigned long flags;
5202 /* SATA spd limit is bound to the first device */
5203 ap->sata_spd_limit = ap->hw_sata_spd_limit;
5205 /* High bits of dev->flags are used to record warm plug
5206 * requests which occur asynchronously. Synchronize using
5209 spin_lock_irqsave(ap->lock, flags);
5210 dev->flags &= ~ATA_DFLAG_INIT_MASK;
5211 spin_unlock_irqrestore(ap->lock, flags);
5213 memset((void *)dev + ATA_DEVICE_CLEAR_OFFSET, 0,
5214 sizeof(*dev) - ATA_DEVICE_CLEAR_OFFSET);
5215 dev->pio_mask = UINT_MAX;
5216 dev->mwdma_mask = UINT_MAX;
5217 dev->udma_mask = UINT_MAX;
5221 * ata_host_init - Initialize an ata_port structure
5222 * @ap: Structure to initialize
5223 * @host: associated SCSI mid-layer structure
5224 * @host_set: Collection of hosts to which @ap belongs
5225 * @ent: Probe information provided by low-level driver
5226 * @port_no: Port number associated with this ata_port
5228 * Initialize a new ata_port structure, and its associated
5232 * Inherited from caller.
5234 static void ata_host_init(struct ata_port *ap, struct Scsi_Host *host,
5235 struct ata_host_set *host_set,
5236 const struct ata_probe_ent *ent, unsigned int port_no)
5242 host->max_channel = 1;
5243 host->unique_id = ata_unique_id++;
5244 host->max_cmd_len = 12;
5246 ap->lock = &host_set->lock;
5247 ap->flags = ATA_FLAG_DISABLED;
5248 ap->id = host->unique_id;
5250 ap->ctl = ATA_DEVCTL_OBS;
5251 ap->host_set = host_set;
5253 ap->port_no = port_no;
5255 ent->legacy_mode ? ent->hard_port_no : port_no;
5256 ap->pio_mask = ent->pio_mask;
5257 ap->mwdma_mask = ent->mwdma_mask;
5258 ap->udma_mask = ent->udma_mask;
5259 ap->flags |= ent->host_flags;
5260 ap->ops = ent->port_ops;
5261 ap->hw_sata_spd_limit = UINT_MAX;
5262 ap->active_tag = ATA_TAG_POISON;
5263 ap->last_ctl = 0xFF;
5265 #if defined(ATA_VERBOSE_DEBUG)
5266 /* turn on all debugging levels */
5267 ap->msg_enable = 0x00FF;
5268 #elif defined(ATA_DEBUG)
5269 ap->msg_enable = ATA_MSG_DRV | ATA_MSG_INFO | ATA_MSG_CTL | ATA_MSG_WARN | ATA_MSG_ERR;
5271 ap->msg_enable = ATA_MSG_DRV | ATA_MSG_ERR | ATA_MSG_WARN;
5274 INIT_WORK(&ap->port_task, NULL, NULL);
5275 INIT_WORK(&ap->hotplug_task, ata_scsi_hotplug, ap);
5276 INIT_WORK(&ap->scsi_rescan_task, ata_scsi_dev_rescan, ap);
5277 INIT_LIST_HEAD(&ap->eh_done_q);
5278 init_waitqueue_head(&ap->eh_wait_q);
5280 /* set cable type */
5281 ap->cbl = ATA_CBL_NONE;
5282 if (ap->flags & ATA_FLAG_SATA)
5283 ap->cbl = ATA_CBL_SATA;
5285 for (i = 0; i < ATA_MAX_DEVICES; i++) {
5286 struct ata_device *dev = &ap->device[i];
5293 ap->stats.unhandled_irq = 1;
5294 ap->stats.idle_irq = 1;
5297 memcpy(&ap->ioaddr, &ent->port[port_no], sizeof(struct ata_ioports));
5301 * ata_host_add - Attach low-level ATA driver to system
5302 * @ent: Information provided by low-level driver
5303 * @host_set: Collections of ports to which we add
5304 * @port_no: Port number associated with this host
5306 * Attach low-level ATA driver to system.
5309 * PCI/etc. bus probe sem.
5312 * New ata_port on success, for NULL on error.
5315 static struct ata_port * ata_host_add(const struct ata_probe_ent *ent,
5316 struct ata_host_set *host_set,
5317 unsigned int port_no)
5319 struct Scsi_Host *host;
5320 struct ata_port *ap;
5325 if (!ent->port_ops->error_handler &&
5326 !(ent->host_flags & (ATA_FLAG_SATA_RESET | ATA_FLAG_SRST))) {
5327 printk(KERN_ERR "ata%u: no reset mechanism available\n",
5332 host = scsi_host_alloc(ent->sht, sizeof(struct ata_port));
5336 host->transportt = &ata_scsi_transport_template;
5338 ap = ata_shost_to_port(host);
5340 ata_host_init(ap, host, host_set, ent, port_no);
5342 rc = ap->ops->port_start(ap);
5349 scsi_host_put(host);
5354 * ata_device_add - Register hardware device with ATA and SCSI layers
5355 * @ent: Probe information describing hardware device to be registered
5357 * This function processes the information provided in the probe
5358 * information struct @ent, allocates the necessary ATA and SCSI
5359 * host information structures, initializes them, and registers
5360 * everything with requisite kernel subsystems.
5362 * This function requests irqs, probes the ATA bus, and probes
5366 * PCI/etc. bus probe sem.
5369 * Number of ports registered. Zero on error (no ports registered).
5371 int ata_device_add(const struct ata_probe_ent *ent)
5373 unsigned int count = 0, i;
5374 struct device *dev = ent->dev;
5375 struct ata_host_set *host_set;
5379 /* alloc a container for our list of ATA ports (buses) */
5380 host_set = kzalloc(sizeof(struct ata_host_set) +
5381 (ent->n_ports * sizeof(void *)), GFP_KERNEL);
5384 spin_lock_init(&host_set->lock);
5386 host_set->dev = dev;
5387 host_set->n_ports = ent->n_ports;
5388 host_set->irq = ent->irq;
5389 host_set->mmio_base = ent->mmio_base;
5390 host_set->private_data = ent->private_data;
5391 host_set->ops = ent->port_ops;
5392 host_set->flags = ent->host_set_flags;
5394 /* register each port bound to this device */
5395 for (i = 0; i < ent->n_ports; i++) {
5396 struct ata_port *ap;
5397 unsigned long xfer_mode_mask;
5399 ap = ata_host_add(ent, host_set, i);
5403 host_set->ports[i] = ap;
5404 xfer_mode_mask =(ap->udma_mask << ATA_SHIFT_UDMA) |
5405 (ap->mwdma_mask << ATA_SHIFT_MWDMA) |
5406 (ap->pio_mask << ATA_SHIFT_PIO);
5408 /* print per-port info to dmesg */
5409 ata_port_printk(ap, KERN_INFO, "%cATA max %s cmd 0x%lX "
5410 "ctl 0x%lX bmdma 0x%lX irq %lu\n",
5411 ap->flags & ATA_FLAG_SATA ? 'S' : 'P',
5412 ata_mode_string(xfer_mode_mask),
5413 ap->ioaddr.cmd_addr,
5414 ap->ioaddr.ctl_addr,
5415 ap->ioaddr.bmdma_addr,
5419 host_set->ops->irq_clear(ap);
5420 ata_eh_freeze_port(ap); /* freeze port before requesting IRQ */
5427 /* obtain irq, that is shared between channels */
5428 rc = request_irq(ent->irq, ent->port_ops->irq_handler, ent->irq_flags,
5429 DRV_NAME, host_set);
5431 dev_printk(KERN_ERR, dev, "irq %lu request failed: %d\n",
5436 /* perform each probe synchronously */
5437 DPRINTK("probe begin\n");
5438 for (i = 0; i < count; i++) {
5439 struct ata_port *ap;
5443 ap = host_set->ports[i];
5445 /* init sata_spd_limit to the current value */
5446 if (sata_scr_read(ap, SCR_CONTROL, &scontrol) == 0) {
5447 int spd = (scontrol >> 4) & 0xf;
5448 ap->hw_sata_spd_limit &= (1 << spd) - 1;
5450 ap->sata_spd_limit = ap->hw_sata_spd_limit;
5452 rc = scsi_add_host(ap->host, dev);
5454 ata_port_printk(ap, KERN_ERR, "scsi_add_host failed\n");
5455 /* FIXME: do something useful here */
5456 /* FIXME: handle unconditional calls to
5457 * scsi_scan_host and ata_host_remove, below,
5462 if (ap->ops->error_handler) {
5463 struct ata_eh_info *ehi = &ap->eh_info;
5464 unsigned long flags;
5468 /* kick EH for boot probing */
5469 spin_lock_irqsave(ap->lock, flags);
5471 ehi->probe_mask = (1 << ATA_MAX_DEVICES) - 1;
5472 ehi->action |= ATA_EH_SOFTRESET;
5473 ehi->flags |= ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET;
5475 ap->pflags |= ATA_PFLAG_LOADING;
5476 ata_port_schedule_eh(ap);
5478 spin_unlock_irqrestore(ap->lock, flags);
5480 /* wait for EH to finish */
5481 ata_port_wait_eh(ap);
5483 DPRINTK("ata%u: bus probe begin\n", ap->id);
5484 rc = ata_bus_probe(ap);
5485 DPRINTK("ata%u: bus probe end\n", ap->id);
5488 /* FIXME: do something useful here?
5489 * Current libata behavior will
5490 * tear down everything when
5491 * the module is removed
5492 * or the h/w is unplugged.
5498 /* probes are done, now scan each port's disk(s) */
5499 DPRINTK("host probe begin\n");
5500 for (i = 0; i < count; i++) {
5501 struct ata_port *ap = host_set->ports[i];
5503 ata_scsi_scan_host(ap);
5506 dev_set_drvdata(dev, host_set);
5508 VPRINTK("EXIT, returning %u\n", ent->n_ports);
5509 return ent->n_ports; /* success */
5512 for (i = 0; i < count; i++) {
5513 struct ata_port *ap = host_set->ports[i];
5515 ap->ops->port_stop(ap);
5516 scsi_host_put(ap->host);
5521 VPRINTK("EXIT, returning 0\n");
5526 * ata_port_detach - Detach ATA port in prepration of device removal
5527 * @ap: ATA port to be detached
5529 * Detach all ATA devices and the associated SCSI devices of @ap;
5530 * then, remove the associated SCSI host. @ap is guaranteed to
5531 * be quiescent on return from this function.
5534 * Kernel thread context (may sleep).
5536 void ata_port_detach(struct ata_port *ap)
5538 unsigned long flags;
5541 if (!ap->ops->error_handler)
5544 /* tell EH we're leaving & flush EH */
5545 spin_lock_irqsave(ap->lock, flags);
5546 ap->pflags |= ATA_PFLAG_UNLOADING;
5547 spin_unlock_irqrestore(ap->lock, flags);
5549 ata_port_wait_eh(ap);
5551 /* EH is now guaranteed to see UNLOADING, so no new device
5552 * will be attached. Disable all existing devices.
5554 spin_lock_irqsave(ap->lock, flags);
5556 for (i = 0; i < ATA_MAX_DEVICES; i++)
5557 ata_dev_disable(&ap->device[i]);
5559 spin_unlock_irqrestore(ap->lock, flags);
5561 /* Final freeze & EH. All in-flight commands are aborted. EH
5562 * will be skipped and retrials will be terminated with bad
5565 spin_lock_irqsave(ap->lock, flags);
5566 ata_port_freeze(ap); /* won't be thawed */
5567 spin_unlock_irqrestore(ap->lock, flags);
5569 ata_port_wait_eh(ap);
5571 /* Flush hotplug task. The sequence is similar to
5572 * ata_port_flush_task().
5574 flush_workqueue(ata_aux_wq);
5575 cancel_delayed_work(&ap->hotplug_task);
5576 flush_workqueue(ata_aux_wq);
5579 /* remove the associated SCSI host */
5580 scsi_remove_host(ap->host);
5584 * ata_host_set_remove - PCI layer callback for device removal
5585 * @host_set: ATA host set that was removed
5587 * Unregister all objects associated with this host set. Free those
5591 * Inherited from calling layer (may sleep).
5594 void ata_host_set_remove(struct ata_host_set *host_set)
5598 for (i = 0; i < host_set->n_ports; i++)
5599 ata_port_detach(host_set->ports[i]);
5601 free_irq(host_set->irq, host_set);
5603 for (i = 0; i < host_set->n_ports; i++) {
5604 struct ata_port *ap = host_set->ports[i];
5606 ata_scsi_release(ap->host);
5608 if ((ap->flags & ATA_FLAG_NO_LEGACY) == 0) {
5609 struct ata_ioports *ioaddr = &ap->ioaddr;
5611 if (ioaddr->cmd_addr == 0x1f0)
5612 release_region(0x1f0, 8);
5613 else if (ioaddr->cmd_addr == 0x170)
5614 release_region(0x170, 8);
5617 scsi_host_put(ap->host);
5620 if (host_set->ops->host_stop)
5621 host_set->ops->host_stop(host_set);
5627 * ata_scsi_release - SCSI layer callback hook for host unload
5628 * @host: libata host to be unloaded
5630 * Performs all duties necessary to shut down a libata port...
5631 * Kill port kthread, disable port, and release resources.
5634 * Inherited from SCSI layer.
5640 int ata_scsi_release(struct Scsi_Host *host)
5642 struct ata_port *ap = ata_shost_to_port(host);
5646 ap->ops->port_disable(ap);
5647 ap->ops->port_stop(ap);
5654 * ata_std_ports - initialize ioaddr with standard port offsets.
5655 * @ioaddr: IO address structure to be initialized
5657 * Utility function which initializes data_addr, error_addr,
5658 * feature_addr, nsect_addr, lbal_addr, lbam_addr, lbah_addr,
5659 * device_addr, status_addr, and command_addr to standard offsets
5660 * relative to cmd_addr.
5662 * Does not set ctl_addr, altstatus_addr, bmdma_addr, or scr_addr.
5665 void ata_std_ports(struct ata_ioports *ioaddr)
5667 ioaddr->data_addr = ioaddr->cmd_addr + ATA_REG_DATA;
5668 ioaddr->error_addr = ioaddr->cmd_addr + ATA_REG_ERR;
5669 ioaddr->feature_addr = ioaddr->cmd_addr + ATA_REG_FEATURE;
5670 ioaddr->nsect_addr = ioaddr->cmd_addr + ATA_REG_NSECT;
5671 ioaddr->lbal_addr = ioaddr->cmd_addr + ATA_REG_LBAL;
5672 ioaddr->lbam_addr = ioaddr->cmd_addr + ATA_REG_LBAM;
5673 ioaddr->lbah_addr = ioaddr->cmd_addr + ATA_REG_LBAH;
5674 ioaddr->device_addr = ioaddr->cmd_addr + ATA_REG_DEVICE;
5675 ioaddr->status_addr = ioaddr->cmd_addr + ATA_REG_STATUS;
5676 ioaddr->command_addr = ioaddr->cmd_addr + ATA_REG_CMD;
5682 void ata_pci_host_stop (struct ata_host_set *host_set)
5684 struct pci_dev *pdev = to_pci_dev(host_set->dev);
5686 pci_iounmap(pdev, host_set->mmio_base);
5690 * ata_pci_remove_one - PCI layer callback for device removal
5691 * @pdev: PCI device that was removed
5693 * PCI layer indicates to libata via this hook that
5694 * hot-unplug or module unload event has occurred.
5695 * Handle this by unregistering all objects associated
5696 * with this PCI device. Free those objects. Then finally
5697 * release PCI resources and disable device.
5700 * Inherited from PCI layer (may sleep).
5703 void ata_pci_remove_one (struct pci_dev *pdev)
5705 struct device *dev = pci_dev_to_dev(pdev);
5706 struct ata_host_set *host_set = dev_get_drvdata(dev);
5707 struct ata_host_set *host_set2 = host_set->next;
5709 ata_host_set_remove(host_set);
5711 ata_host_set_remove(host_set2);
5713 pci_release_regions(pdev);
5714 pci_disable_device(pdev);
5715 dev_set_drvdata(dev, NULL);
5718 /* move to PCI subsystem */
5719 int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits)
5721 unsigned long tmp = 0;
5723 switch (bits->width) {
5726 pci_read_config_byte(pdev, bits->reg, &tmp8);
5732 pci_read_config_word(pdev, bits->reg, &tmp16);
5738 pci_read_config_dword(pdev, bits->reg, &tmp32);
5749 return (tmp == bits->val) ? 1 : 0;
5752 void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t state)
5754 pci_save_state(pdev);
5756 if (state.event == PM_EVENT_SUSPEND) {
5757 pci_disable_device(pdev);
5758 pci_set_power_state(pdev, PCI_D3hot);
5762 void ata_pci_device_do_resume(struct pci_dev *pdev)
5764 pci_set_power_state(pdev, PCI_D0);
5765 pci_restore_state(pdev);
5766 pci_enable_device(pdev);
5767 pci_set_master(pdev);
5770 int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t state)
5772 struct ata_host_set *host_set = dev_get_drvdata(&pdev->dev);
5775 rc = ata_host_set_suspend(host_set, state);
5779 if (host_set->next) {
5780 rc = ata_host_set_suspend(host_set->next, state);
5782 ata_host_set_resume(host_set);
5787 ata_pci_device_do_suspend(pdev, state);
5792 int ata_pci_device_resume(struct pci_dev *pdev)
5794 struct ata_host_set *host_set = dev_get_drvdata(&pdev->dev);
5796 ata_pci_device_do_resume(pdev);
5797 ata_host_set_resume(host_set);
5799 ata_host_set_resume(host_set->next);
5803 #endif /* CONFIG_PCI */
5806 static int __init ata_init(void)
5808 ata_probe_timeout *= HZ;
5809 ata_wq = create_workqueue("ata");
5813 ata_aux_wq = create_singlethread_workqueue("ata_aux");
5815 destroy_workqueue(ata_wq);
5819 printk(KERN_DEBUG "libata version " DRV_VERSION " loaded.\n");
5823 static void __exit ata_exit(void)
5825 destroy_workqueue(ata_wq);
5826 destroy_workqueue(ata_aux_wq);
5829 module_init(ata_init);
5830 module_exit(ata_exit);
5832 static unsigned long ratelimit_time;
5833 static DEFINE_SPINLOCK(ata_ratelimit_lock);
5835 int ata_ratelimit(void)
5838 unsigned long flags;
5840 spin_lock_irqsave(&ata_ratelimit_lock, flags);
5842 if (time_after(jiffies, ratelimit_time)) {
5844 ratelimit_time = jiffies + (HZ/5);
5848 spin_unlock_irqrestore(&ata_ratelimit_lock, flags);
5854 * ata_wait_register - wait until register value changes
5855 * @reg: IO-mapped register
5856 * @mask: Mask to apply to read register value
5857 * @val: Wait condition
5858 * @interval_msec: polling interval in milliseconds
5859 * @timeout_msec: timeout in milliseconds
5861 * Waiting for some bits of register to change is a common
5862 * operation for ATA controllers. This function reads 32bit LE
5863 * IO-mapped register @reg and tests for the following condition.
5865 * (*@reg & mask) != val
5867 * If the condition is met, it returns; otherwise, the process is
5868 * repeated after @interval_msec until timeout.
5871 * Kernel thread context (may sleep)
5874 * The final register value.
5876 u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val,
5877 unsigned long interval_msec,
5878 unsigned long timeout_msec)
5880 unsigned long timeout;
5883 tmp = ioread32(reg);
5885 /* Calculate timeout _after_ the first read to make sure
5886 * preceding writes reach the controller before starting to
5887 * eat away the timeout.
5889 timeout = jiffies + (timeout_msec * HZ) / 1000;
5891 while ((tmp & mask) == val && time_before(jiffies, timeout)) {
5892 msleep(interval_msec);
5893 tmp = ioread32(reg);
5900 * libata is essentially a library of internal helper functions for
5901 * low-level ATA host controller drivers. As such, the API/ABI is
5902 * likely to change as new drivers are added and updated.
5903 * Do not depend on ABI/API stability.
5906 EXPORT_SYMBOL_GPL(sata_deb_timing_normal);
5907 EXPORT_SYMBOL_GPL(sata_deb_timing_hotplug);
5908 EXPORT_SYMBOL_GPL(sata_deb_timing_long);
5909 EXPORT_SYMBOL_GPL(ata_std_bios_param);
5910 EXPORT_SYMBOL_GPL(ata_std_ports);
5911 EXPORT_SYMBOL_GPL(ata_device_add);
5912 EXPORT_SYMBOL_GPL(ata_port_detach);
5913 EXPORT_SYMBOL_GPL(ata_host_set_remove);
5914 EXPORT_SYMBOL_GPL(ata_sg_init);
5915 EXPORT_SYMBOL_GPL(ata_sg_init_one);
5916 EXPORT_SYMBOL_GPL(ata_hsm_move);
5917 EXPORT_SYMBOL_GPL(ata_qc_complete);
5918 EXPORT_SYMBOL_GPL(ata_qc_complete_multiple);
5919 EXPORT_SYMBOL_GPL(ata_qc_issue_prot);
5920 EXPORT_SYMBOL_GPL(ata_tf_load);
5921 EXPORT_SYMBOL_GPL(ata_tf_read);
5922 EXPORT_SYMBOL_GPL(ata_noop_dev_select);
5923 EXPORT_SYMBOL_GPL(ata_std_dev_select);
5924 EXPORT_SYMBOL_GPL(ata_tf_to_fis);
5925 EXPORT_SYMBOL_GPL(ata_tf_from_fis);
5926 EXPORT_SYMBOL_GPL(ata_check_status);
5927 EXPORT_SYMBOL_GPL(ata_altstatus);
5928 EXPORT_SYMBOL_GPL(ata_exec_command);
5929 EXPORT_SYMBOL_GPL(ata_port_start);
5930 EXPORT_SYMBOL_GPL(ata_port_stop);
5931 EXPORT_SYMBOL_GPL(ata_host_stop);
5932 EXPORT_SYMBOL_GPL(ata_interrupt);
5933 EXPORT_SYMBOL_GPL(ata_mmio_data_xfer);
5934 EXPORT_SYMBOL_GPL(ata_pio_data_xfer);
5935 EXPORT_SYMBOL_GPL(ata_pio_data_xfer_noirq);
5936 EXPORT_SYMBOL_GPL(ata_qc_prep);
5937 EXPORT_SYMBOL_GPL(ata_noop_qc_prep);
5938 EXPORT_SYMBOL_GPL(ata_bmdma_setup);
5939 EXPORT_SYMBOL_GPL(ata_bmdma_start);
5940 EXPORT_SYMBOL_GPL(ata_bmdma_irq_clear);
5941 EXPORT_SYMBOL_GPL(ata_bmdma_status);
5942 EXPORT_SYMBOL_GPL(ata_bmdma_stop);
5943 EXPORT_SYMBOL_GPL(ata_bmdma_freeze);
5944 EXPORT_SYMBOL_GPL(ata_bmdma_thaw);
5945 EXPORT_SYMBOL_GPL(ata_bmdma_drive_eh);
5946 EXPORT_SYMBOL_GPL(ata_bmdma_error_handler);
5947 EXPORT_SYMBOL_GPL(ata_bmdma_post_internal_cmd);
5948 EXPORT_SYMBOL_GPL(ata_port_probe);
5949 EXPORT_SYMBOL_GPL(sata_set_spd);
5950 EXPORT_SYMBOL_GPL(sata_phy_debounce);
5951 EXPORT_SYMBOL_GPL(sata_phy_resume);
5952 EXPORT_SYMBOL_GPL(sata_phy_reset);
5953 EXPORT_SYMBOL_GPL(__sata_phy_reset);
5954 EXPORT_SYMBOL_GPL(ata_bus_reset);
5955 EXPORT_SYMBOL_GPL(ata_std_prereset);
5956 EXPORT_SYMBOL_GPL(ata_std_softreset);
5957 EXPORT_SYMBOL_GPL(sata_std_hardreset);
5958 EXPORT_SYMBOL_GPL(ata_std_postreset);
5959 EXPORT_SYMBOL_GPL(ata_dev_revalidate);
5960 EXPORT_SYMBOL_GPL(ata_dev_classify);
5961 EXPORT_SYMBOL_GPL(ata_dev_pair);
5962 EXPORT_SYMBOL_GPL(ata_port_disable);
5963 EXPORT_SYMBOL_GPL(ata_ratelimit);
5964 EXPORT_SYMBOL_GPL(ata_wait_register);
5965 EXPORT_SYMBOL_GPL(ata_busy_sleep);
5966 EXPORT_SYMBOL_GPL(ata_port_queue_task);
5967 EXPORT_SYMBOL_GPL(ata_scsi_ioctl);
5968 EXPORT_SYMBOL_GPL(ata_scsi_queuecmd);
5969 EXPORT_SYMBOL_GPL(ata_scsi_slave_config);
5970 EXPORT_SYMBOL_GPL(ata_scsi_slave_destroy);
5971 EXPORT_SYMBOL_GPL(ata_scsi_change_queue_depth);
5972 EXPORT_SYMBOL_GPL(ata_scsi_release);
5973 EXPORT_SYMBOL_GPL(ata_host_intr);
5974 EXPORT_SYMBOL_GPL(sata_scr_valid);
5975 EXPORT_SYMBOL_GPL(sata_scr_read);
5976 EXPORT_SYMBOL_GPL(sata_scr_write);
5977 EXPORT_SYMBOL_GPL(sata_scr_write_flush);
5978 EXPORT_SYMBOL_GPL(ata_port_online);
5979 EXPORT_SYMBOL_GPL(ata_port_offline);
5980 EXPORT_SYMBOL_GPL(ata_host_set_suspend);
5981 EXPORT_SYMBOL_GPL(ata_host_set_resume);
5982 EXPORT_SYMBOL_GPL(ata_id_string);
5983 EXPORT_SYMBOL_GPL(ata_id_c_string);
5984 EXPORT_SYMBOL_GPL(ata_scsi_simulate);
5986 EXPORT_SYMBOL_GPL(ata_pio_need_iordy);
5987 EXPORT_SYMBOL_GPL(ata_timing_compute);
5988 EXPORT_SYMBOL_GPL(ata_timing_merge);
5991 EXPORT_SYMBOL_GPL(pci_test_config_bits);
5992 EXPORT_SYMBOL_GPL(ata_pci_host_stop);
5993 EXPORT_SYMBOL_GPL(ata_pci_init_native_mode);
5994 EXPORT_SYMBOL_GPL(ata_pci_init_one);
5995 EXPORT_SYMBOL_GPL(ata_pci_remove_one);
5996 EXPORT_SYMBOL_GPL(ata_pci_device_do_suspend);
5997 EXPORT_SYMBOL_GPL(ata_pci_device_do_resume);
5998 EXPORT_SYMBOL_GPL(ata_pci_device_suspend);
5999 EXPORT_SYMBOL_GPL(ata_pci_device_resume);
6000 EXPORT_SYMBOL_GPL(ata_pci_default_filter);
6001 EXPORT_SYMBOL_GPL(ata_pci_clear_simplex);
6002 #endif /* CONFIG_PCI */
6004 EXPORT_SYMBOL_GPL(ata_scsi_device_suspend);
6005 EXPORT_SYMBOL_GPL(ata_scsi_device_resume);
6007 EXPORT_SYMBOL_GPL(ata_eng_timeout);
6008 EXPORT_SYMBOL_GPL(ata_port_schedule_eh);
6009 EXPORT_SYMBOL_GPL(ata_port_abort);
6010 EXPORT_SYMBOL_GPL(ata_port_freeze);
6011 EXPORT_SYMBOL_GPL(ata_eh_freeze_port);
6012 EXPORT_SYMBOL_GPL(ata_eh_thaw_port);
6013 EXPORT_SYMBOL_GPL(ata_eh_qc_complete);
6014 EXPORT_SYMBOL_GPL(ata_eh_qc_retry);
6015 EXPORT_SYMBOL_GPL(ata_do_eh);