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/scsi_cmnd.h>
54 #include <scsi/scsi_host.h>
55 #include <linux/libata.h>
57 #include <asm/semaphore.h>
58 #include <asm/byteorder.h>
62 #define DRV_VERSION "2.20" /* must be exactly four chars */
65 /* debounce timing parameters in msecs { interval, duration, timeout } */
66 const unsigned long sata_deb_timing_normal[] = { 5, 100, 2000 };
67 const unsigned long sata_deb_timing_hotplug[] = { 25, 500, 2000 };
68 const unsigned long sata_deb_timing_long[] = { 100, 2000, 5000 };
70 static unsigned int ata_dev_init_params(struct ata_device *dev,
71 u16 heads, u16 sectors);
72 static unsigned int ata_dev_set_xfermode(struct ata_device *dev);
73 static void ata_dev_xfermask(struct ata_device *dev);
75 unsigned int ata_print_id = 1;
76 static struct workqueue_struct *ata_wq;
78 struct workqueue_struct *ata_aux_wq;
80 int atapi_enabled = 1;
81 module_param(atapi_enabled, int, 0444);
82 MODULE_PARM_DESC(atapi_enabled, "Enable discovery of ATAPI devices (0=off, 1=on)");
85 module_param(atapi_dmadir, int, 0444);
86 MODULE_PARM_DESC(atapi_dmadir, "Enable ATAPI DMADIR bridge support (0=off, 1=on)");
89 module_param_named(fua, libata_fua, int, 0444);
90 MODULE_PARM_DESC(fua, "FUA support (0=off, 1=on)");
92 static int ata_ignore_hpa = 0;
93 module_param_named(ignore_hpa, ata_ignore_hpa, int, 0644);
94 MODULE_PARM_DESC(ignore_hpa, "Ignore HPA limit (0=keep BIOS limits, 1=ignore limits, using full disk)");
96 static int ata_probe_timeout = ATA_TMOUT_INTERNAL / HZ;
97 module_param(ata_probe_timeout, int, 0444);
98 MODULE_PARM_DESC(ata_probe_timeout, "Set ATA probing timeout (seconds)");
100 int libata_noacpi = 1;
101 module_param_named(noacpi, libata_noacpi, int, 0444);
102 MODULE_PARM_DESC(noacpi, "Disables the use of ACPI in suspend/resume when set");
104 int ata_spindown_compat = 1;
105 module_param_named(spindown_compat, ata_spindown_compat, int, 0644);
106 MODULE_PARM_DESC(spindown_compat, "Enable backward compatible spindown "
107 "behavior. Will be removed. More info can be found in "
108 "Documentation/feature-removal-schedule.txt\n");
110 MODULE_AUTHOR("Jeff Garzik");
111 MODULE_DESCRIPTION("Library module for ATA devices");
112 MODULE_LICENSE("GPL");
113 MODULE_VERSION(DRV_VERSION);
117 * ata_tf_to_fis - Convert ATA taskfile to SATA FIS structure
118 * @tf: Taskfile to convert
119 * @fis: Buffer into which data will output
120 * @pmp: Port multiplier port
122 * Converts a standard ATA taskfile to a Serial ATA
123 * FIS structure (Register - Host to Device).
126 * Inherited from caller.
129 void ata_tf_to_fis(const struct ata_taskfile *tf, u8 *fis, u8 pmp)
131 fis[0] = 0x27; /* Register - Host to Device FIS */
132 fis[1] = (pmp & 0xf) | (1 << 7); /* Port multiplier number,
133 bit 7 indicates Command FIS */
134 fis[2] = tf->command;
135 fis[3] = tf->feature;
142 fis[8] = tf->hob_lbal;
143 fis[9] = tf->hob_lbam;
144 fis[10] = tf->hob_lbah;
145 fis[11] = tf->hob_feature;
148 fis[13] = tf->hob_nsect;
159 * ata_tf_from_fis - Convert SATA FIS to ATA taskfile
160 * @fis: Buffer from which data will be input
161 * @tf: Taskfile to output
163 * Converts a serial ATA FIS structure to a standard ATA taskfile.
166 * Inherited from caller.
169 void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf)
171 tf->command = fis[2]; /* status */
172 tf->feature = fis[3]; /* error */
179 tf->hob_lbal = fis[8];
180 tf->hob_lbam = fis[9];
181 tf->hob_lbah = fis[10];
184 tf->hob_nsect = fis[13];
187 static const u8 ata_rw_cmds[] = {
191 ATA_CMD_READ_MULTI_EXT,
192 ATA_CMD_WRITE_MULTI_EXT,
196 ATA_CMD_WRITE_MULTI_FUA_EXT,
200 ATA_CMD_PIO_READ_EXT,
201 ATA_CMD_PIO_WRITE_EXT,
214 ATA_CMD_WRITE_FUA_EXT
218 * ata_rwcmd_protocol - set taskfile r/w commands and protocol
219 * @tf: command to examine and configure
220 * @dev: device tf belongs to
222 * Examine the device configuration and tf->flags to calculate
223 * the proper read/write commands and protocol to use.
228 static int ata_rwcmd_protocol(struct ata_taskfile *tf, struct ata_device *dev)
232 int index, fua, lba48, write;
234 fua = (tf->flags & ATA_TFLAG_FUA) ? 4 : 0;
235 lba48 = (tf->flags & ATA_TFLAG_LBA48) ? 2 : 0;
236 write = (tf->flags & ATA_TFLAG_WRITE) ? 1 : 0;
238 if (dev->flags & ATA_DFLAG_PIO) {
239 tf->protocol = ATA_PROT_PIO;
240 index = dev->multi_count ? 0 : 8;
241 } else if (lba48 && (dev->ap->flags & ATA_FLAG_PIO_LBA48)) {
242 /* Unable to use DMA due to host limitation */
243 tf->protocol = ATA_PROT_PIO;
244 index = dev->multi_count ? 0 : 8;
246 tf->protocol = ATA_PROT_DMA;
250 cmd = ata_rw_cmds[index + fua + lba48 + write];
259 * ata_tf_read_block - Read block address from ATA taskfile
260 * @tf: ATA taskfile of interest
261 * @dev: ATA device @tf belongs to
266 * Read block address from @tf. This function can handle all
267 * three address formats - LBA, LBA48 and CHS. tf->protocol and
268 * flags select the address format to use.
271 * Block address read from @tf.
273 u64 ata_tf_read_block(struct ata_taskfile *tf, struct ata_device *dev)
277 if (tf->flags & ATA_TFLAG_LBA) {
278 if (tf->flags & ATA_TFLAG_LBA48) {
279 block |= (u64)tf->hob_lbah << 40;
280 block |= (u64)tf->hob_lbam << 32;
281 block |= tf->hob_lbal << 24;
283 block |= (tf->device & 0xf) << 24;
285 block |= tf->lbah << 16;
286 block |= tf->lbam << 8;
291 cyl = tf->lbam | (tf->lbah << 8);
292 head = tf->device & 0xf;
295 block = (cyl * dev->heads + head) * dev->sectors + sect;
302 * ata_build_rw_tf - Build ATA taskfile for given read/write request
303 * @tf: Target ATA taskfile
304 * @dev: ATA device @tf belongs to
305 * @block: Block address
306 * @n_block: Number of blocks
307 * @tf_flags: RW/FUA etc...
313 * Build ATA taskfile @tf for read/write request described by
314 * @block, @n_block, @tf_flags and @tag on @dev.
318 * 0 on success, -ERANGE if the request is too large for @dev,
319 * -EINVAL if the request is invalid.
321 int ata_build_rw_tf(struct ata_taskfile *tf, struct ata_device *dev,
322 u64 block, u32 n_block, unsigned int tf_flags,
325 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
326 tf->flags |= tf_flags;
328 if (ata_ncq_enabled(dev) && likely(tag != ATA_TAG_INTERNAL)) {
330 if (!lba_48_ok(block, n_block))
333 tf->protocol = ATA_PROT_NCQ;
334 tf->flags |= ATA_TFLAG_LBA | ATA_TFLAG_LBA48;
336 if (tf->flags & ATA_TFLAG_WRITE)
337 tf->command = ATA_CMD_FPDMA_WRITE;
339 tf->command = ATA_CMD_FPDMA_READ;
341 tf->nsect = tag << 3;
342 tf->hob_feature = (n_block >> 8) & 0xff;
343 tf->feature = n_block & 0xff;
345 tf->hob_lbah = (block >> 40) & 0xff;
346 tf->hob_lbam = (block >> 32) & 0xff;
347 tf->hob_lbal = (block >> 24) & 0xff;
348 tf->lbah = (block >> 16) & 0xff;
349 tf->lbam = (block >> 8) & 0xff;
350 tf->lbal = block & 0xff;
353 if (tf->flags & ATA_TFLAG_FUA)
354 tf->device |= 1 << 7;
355 } else if (dev->flags & ATA_DFLAG_LBA) {
356 tf->flags |= ATA_TFLAG_LBA;
358 if (lba_28_ok(block, n_block)) {
360 tf->device |= (block >> 24) & 0xf;
361 } else if (lba_48_ok(block, n_block)) {
362 if (!(dev->flags & ATA_DFLAG_LBA48))
366 tf->flags |= ATA_TFLAG_LBA48;
368 tf->hob_nsect = (n_block >> 8) & 0xff;
370 tf->hob_lbah = (block >> 40) & 0xff;
371 tf->hob_lbam = (block >> 32) & 0xff;
372 tf->hob_lbal = (block >> 24) & 0xff;
374 /* request too large even for LBA48 */
377 if (unlikely(ata_rwcmd_protocol(tf, dev) < 0))
380 tf->nsect = n_block & 0xff;
382 tf->lbah = (block >> 16) & 0xff;
383 tf->lbam = (block >> 8) & 0xff;
384 tf->lbal = block & 0xff;
386 tf->device |= ATA_LBA;
389 u32 sect, head, cyl, track;
391 /* The request -may- be too large for CHS addressing. */
392 if (!lba_28_ok(block, n_block))
395 if (unlikely(ata_rwcmd_protocol(tf, dev) < 0))
398 /* Convert LBA to CHS */
399 track = (u32)block / dev->sectors;
400 cyl = track / dev->heads;
401 head = track % dev->heads;
402 sect = (u32)block % dev->sectors + 1;
404 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
405 (u32)block, track, cyl, head, sect);
407 /* Check whether the converted CHS can fit.
411 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
414 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
425 * ata_pack_xfermask - Pack pio, mwdma and udma masks into xfer_mask
426 * @pio_mask: pio_mask
427 * @mwdma_mask: mwdma_mask
428 * @udma_mask: udma_mask
430 * Pack @pio_mask, @mwdma_mask and @udma_mask into a single
431 * unsigned int xfer_mask.
439 static unsigned int ata_pack_xfermask(unsigned int pio_mask,
440 unsigned int mwdma_mask,
441 unsigned int udma_mask)
443 return ((pio_mask << ATA_SHIFT_PIO) & ATA_MASK_PIO) |
444 ((mwdma_mask << ATA_SHIFT_MWDMA) & ATA_MASK_MWDMA) |
445 ((udma_mask << ATA_SHIFT_UDMA) & ATA_MASK_UDMA);
449 * ata_unpack_xfermask - Unpack xfer_mask into pio, mwdma and udma masks
450 * @xfer_mask: xfer_mask to unpack
451 * @pio_mask: resulting pio_mask
452 * @mwdma_mask: resulting mwdma_mask
453 * @udma_mask: resulting udma_mask
455 * Unpack @xfer_mask into @pio_mask, @mwdma_mask and @udma_mask.
456 * Any NULL distination masks will be ignored.
458 static void ata_unpack_xfermask(unsigned int xfer_mask,
459 unsigned int *pio_mask,
460 unsigned int *mwdma_mask,
461 unsigned int *udma_mask)
464 *pio_mask = (xfer_mask & ATA_MASK_PIO) >> ATA_SHIFT_PIO;
466 *mwdma_mask = (xfer_mask & ATA_MASK_MWDMA) >> ATA_SHIFT_MWDMA;
468 *udma_mask = (xfer_mask & ATA_MASK_UDMA) >> ATA_SHIFT_UDMA;
471 static const struct ata_xfer_ent {
475 { ATA_SHIFT_PIO, ATA_BITS_PIO, XFER_PIO_0 },
476 { ATA_SHIFT_MWDMA, ATA_BITS_MWDMA, XFER_MW_DMA_0 },
477 { ATA_SHIFT_UDMA, ATA_BITS_UDMA, XFER_UDMA_0 },
482 * ata_xfer_mask2mode - Find matching XFER_* for the given xfer_mask
483 * @xfer_mask: xfer_mask of interest
485 * Return matching XFER_* value for @xfer_mask. Only the highest
486 * bit of @xfer_mask is considered.
492 * Matching XFER_* value, 0 if no match found.
494 static u8 ata_xfer_mask2mode(unsigned int xfer_mask)
496 int highbit = fls(xfer_mask) - 1;
497 const struct ata_xfer_ent *ent;
499 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
500 if (highbit >= ent->shift && highbit < ent->shift + ent->bits)
501 return ent->base + highbit - ent->shift;
506 * ata_xfer_mode2mask - Find matching xfer_mask for XFER_*
507 * @xfer_mode: XFER_* of interest
509 * Return matching xfer_mask for @xfer_mode.
515 * Matching xfer_mask, 0 if no match found.
517 static unsigned int ata_xfer_mode2mask(u8 xfer_mode)
519 const struct ata_xfer_ent *ent;
521 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
522 if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits)
523 return 1 << (ent->shift + xfer_mode - ent->base);
528 * ata_xfer_mode2shift - Find matching xfer_shift for XFER_*
529 * @xfer_mode: XFER_* of interest
531 * Return matching xfer_shift for @xfer_mode.
537 * Matching xfer_shift, -1 if no match found.
539 static int ata_xfer_mode2shift(unsigned int xfer_mode)
541 const struct ata_xfer_ent *ent;
543 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
544 if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits)
550 * ata_mode_string - convert xfer_mask to string
551 * @xfer_mask: mask of bits supported; only highest bit counts.
553 * Determine string which represents the highest speed
554 * (highest bit in @modemask).
560 * Constant C string representing highest speed listed in
561 * @mode_mask, or the constant C string "<n/a>".
563 static const char *ata_mode_string(unsigned int xfer_mask)
565 static const char * const xfer_mode_str[] = {
589 highbit = fls(xfer_mask) - 1;
590 if (highbit >= 0 && highbit < ARRAY_SIZE(xfer_mode_str))
591 return xfer_mode_str[highbit];
595 static const char *sata_spd_string(unsigned int spd)
597 static const char * const spd_str[] = {
602 if (spd == 0 || (spd - 1) >= ARRAY_SIZE(spd_str))
604 return spd_str[spd - 1];
607 void ata_dev_disable(struct ata_device *dev)
609 if (ata_dev_enabled(dev) && ata_msg_drv(dev->ap)) {
610 ata_dev_printk(dev, KERN_WARNING, "disabled\n");
611 ata_down_xfermask_limit(dev, ATA_DNXFER_FORCE_PIO0 |
618 * ata_devchk - PATA device presence detection
619 * @ap: ATA channel to examine
620 * @device: Device to examine (starting at zero)
622 * This technique was originally described in
623 * Hale Landis's ATADRVR (www.ata-atapi.com), and
624 * later found its way into the ATA/ATAPI spec.
626 * Write a pattern to the ATA shadow registers,
627 * and if a device is present, it will respond by
628 * correctly storing and echoing back the
629 * ATA shadow register contents.
635 static unsigned int ata_devchk(struct ata_port *ap, unsigned int device)
637 struct ata_ioports *ioaddr = &ap->ioaddr;
640 ap->ops->dev_select(ap, device);
642 iowrite8(0x55, ioaddr->nsect_addr);
643 iowrite8(0xaa, ioaddr->lbal_addr);
645 iowrite8(0xaa, ioaddr->nsect_addr);
646 iowrite8(0x55, ioaddr->lbal_addr);
648 iowrite8(0x55, ioaddr->nsect_addr);
649 iowrite8(0xaa, ioaddr->lbal_addr);
651 nsect = ioread8(ioaddr->nsect_addr);
652 lbal = ioread8(ioaddr->lbal_addr);
654 if ((nsect == 0x55) && (lbal == 0xaa))
655 return 1; /* we found a device */
657 return 0; /* nothing found */
661 * ata_dev_classify - determine device type based on ATA-spec signature
662 * @tf: ATA taskfile register set for device to be identified
664 * Determine from taskfile register contents whether a device is
665 * ATA or ATAPI, as per "Signature and persistence" section
666 * of ATA/PI spec (volume 1, sect 5.14).
672 * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, or %ATA_DEV_UNKNOWN
673 * the event of failure.
676 unsigned int ata_dev_classify(const struct ata_taskfile *tf)
678 /* Apple's open source Darwin code hints that some devices only
679 * put a proper signature into the LBA mid/high registers,
680 * So, we only check those. It's sufficient for uniqueness.
683 if (((tf->lbam == 0) && (tf->lbah == 0)) ||
684 ((tf->lbam == 0x3c) && (tf->lbah == 0xc3))) {
685 DPRINTK("found ATA device by sig\n");
689 if (((tf->lbam == 0x14) && (tf->lbah == 0xeb)) ||
690 ((tf->lbam == 0x69) && (tf->lbah == 0x96))) {
691 DPRINTK("found ATAPI device by sig\n");
692 return ATA_DEV_ATAPI;
695 DPRINTK("unknown device\n");
696 return ATA_DEV_UNKNOWN;
700 * ata_dev_try_classify - Parse returned ATA device signature
701 * @ap: ATA channel to examine
702 * @device: Device to examine (starting at zero)
703 * @r_err: Value of error register on completion
705 * After an event -- SRST, E.D.D., or SATA COMRESET -- occurs,
706 * an ATA/ATAPI-defined set of values is placed in the ATA
707 * shadow registers, indicating the results of device detection
710 * Select the ATA device, and read the values from the ATA shadow
711 * registers. Then parse according to the Error register value,
712 * and the spec-defined values examined by ata_dev_classify().
718 * Device type - %ATA_DEV_ATA, %ATA_DEV_ATAPI or %ATA_DEV_NONE.
722 ata_dev_try_classify(struct ata_port *ap, unsigned int device, u8 *r_err)
724 struct ata_taskfile tf;
728 ap->ops->dev_select(ap, device);
730 memset(&tf, 0, sizeof(tf));
732 ap->ops->tf_read(ap, &tf);
737 /* see if device passed diags: if master then continue and warn later */
738 if (err == 0 && device == 0)
739 /* diagnostic fail : do nothing _YET_ */
740 ap->device[device].horkage |= ATA_HORKAGE_DIAGNOSTIC;
743 else if ((device == 0) && (err == 0x81))
748 /* determine if device is ATA or ATAPI */
749 class = ata_dev_classify(&tf);
751 if (class == ATA_DEV_UNKNOWN)
753 if ((class == ATA_DEV_ATA) && (ata_chk_status(ap) == 0))
759 * ata_id_string - Convert IDENTIFY DEVICE page into string
760 * @id: IDENTIFY DEVICE results we will examine
761 * @s: string into which data is output
762 * @ofs: offset into identify device page
763 * @len: length of string to return. must be an even number.
765 * The strings in the IDENTIFY DEVICE page are broken up into
766 * 16-bit chunks. Run through the string, and output each
767 * 8-bit chunk linearly, regardless of platform.
773 void ata_id_string(const u16 *id, unsigned char *s,
774 unsigned int ofs, unsigned int len)
793 * ata_id_c_string - Convert IDENTIFY DEVICE page into C string
794 * @id: IDENTIFY DEVICE results we will examine
795 * @s: string into which data is output
796 * @ofs: offset into identify device page
797 * @len: length of string to return. must be an odd number.
799 * This function is identical to ata_id_string except that it
800 * trims trailing spaces and terminates the resulting string with
801 * null. @len must be actual maximum length (even number) + 1.
806 void ata_id_c_string(const u16 *id, unsigned char *s,
807 unsigned int ofs, unsigned int len)
813 ata_id_string(id, s, ofs, len - 1);
815 p = s + strnlen(s, len - 1);
816 while (p > s && p[-1] == ' ')
821 static u64 ata_tf_to_lba48(struct ata_taskfile *tf)
825 sectors |= ((u64)(tf->hob_lbah & 0xff)) << 40;
826 sectors |= ((u64)(tf->hob_lbam & 0xff)) << 32;
827 sectors |= (tf->hob_lbal & 0xff) << 24;
828 sectors |= (tf->lbah & 0xff) << 16;
829 sectors |= (tf->lbam & 0xff) << 8;
830 sectors |= (tf->lbal & 0xff);
835 static u64 ata_tf_to_lba(struct ata_taskfile *tf)
839 sectors |= (tf->device & 0x0f) << 24;
840 sectors |= (tf->lbah & 0xff) << 16;
841 sectors |= (tf->lbam & 0xff) << 8;
842 sectors |= (tf->lbal & 0xff);
848 * ata_read_native_max_address_ext - LBA48 native max query
849 * @dev: Device to query
851 * Perform an LBA48 size query upon the device in question. Return the
852 * actual LBA48 size or zero if the command fails.
855 static u64 ata_read_native_max_address_ext(struct ata_device *dev)
858 struct ata_taskfile tf;
860 ata_tf_init(dev, &tf);
862 tf.command = ATA_CMD_READ_NATIVE_MAX_EXT;
863 tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48 | ATA_TFLAG_ISADDR;
864 tf.protocol |= ATA_PROT_NODATA;
867 err = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0);
871 return ata_tf_to_lba48(&tf);
875 * ata_read_native_max_address - LBA28 native max query
876 * @dev: Device to query
878 * Performa an LBA28 size query upon the device in question. Return the
879 * actual LBA28 size or zero if the command fails.
882 static u64 ata_read_native_max_address(struct ata_device *dev)
885 struct ata_taskfile tf;
887 ata_tf_init(dev, &tf);
889 tf.command = ATA_CMD_READ_NATIVE_MAX;
890 tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
891 tf.protocol |= ATA_PROT_NODATA;
894 err = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0);
898 return ata_tf_to_lba(&tf);
902 * ata_set_native_max_address_ext - LBA48 native max set
903 * @dev: Device to query
904 * @new_sectors: new max sectors value to set for the device
906 * Perform an LBA48 size set max upon the device in question. Return the
907 * actual LBA48 size or zero if the command fails.
910 static u64 ata_set_native_max_address_ext(struct ata_device *dev, u64 new_sectors)
913 struct ata_taskfile tf;
917 ata_tf_init(dev, &tf);
919 tf.command = ATA_CMD_SET_MAX_EXT;
920 tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48 | ATA_TFLAG_ISADDR;
921 tf.protocol |= ATA_PROT_NODATA;
924 tf.lbal = (new_sectors >> 0) & 0xff;
925 tf.lbam = (new_sectors >> 8) & 0xff;
926 tf.lbah = (new_sectors >> 16) & 0xff;
928 tf.hob_lbal = (new_sectors >> 24) & 0xff;
929 tf.hob_lbam = (new_sectors >> 32) & 0xff;
930 tf.hob_lbah = (new_sectors >> 40) & 0xff;
932 err = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0);
936 return ata_tf_to_lba48(&tf);
940 * ata_set_native_max_address - LBA28 native max set
941 * @dev: Device to query
942 * @new_sectors: new max sectors value to set for the device
944 * Perform an LBA28 size set max upon the device in question. Return the
945 * actual LBA28 size or zero if the command fails.
948 static u64 ata_set_native_max_address(struct ata_device *dev, u64 new_sectors)
951 struct ata_taskfile tf;
955 ata_tf_init(dev, &tf);
957 tf.command = ATA_CMD_SET_MAX;
958 tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
959 tf.protocol |= ATA_PROT_NODATA;
961 tf.lbal = (new_sectors >> 0) & 0xff;
962 tf.lbam = (new_sectors >> 8) & 0xff;
963 tf.lbah = (new_sectors >> 16) & 0xff;
964 tf.device |= ((new_sectors >> 24) & 0x0f) | 0x40;
966 err = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0);
970 return ata_tf_to_lba(&tf);
974 * ata_hpa_resize - Resize a device with an HPA set
975 * @dev: Device to resize
977 * Read the size of an LBA28 or LBA48 disk with HPA features and resize
978 * it if required to the full size of the media. The caller must check
979 * the drive has the HPA feature set enabled.
982 static u64 ata_hpa_resize(struct ata_device *dev)
984 u64 sectors = dev->n_sectors;
987 if (ata_id_has_lba48(dev->id))
988 hpa_sectors = ata_read_native_max_address_ext(dev);
990 hpa_sectors = ata_read_native_max_address(dev);
992 /* if no hpa, both should be equal */
993 ata_dev_printk(dev, KERN_INFO, "%s 1: sectors = %lld, "
994 "hpa_sectors = %lld\n",
995 __FUNCTION__, (long long)sectors, (long long)hpa_sectors);
997 if (hpa_sectors > sectors) {
998 ata_dev_printk(dev, KERN_INFO,
999 "Host Protected Area detected:\n"
1000 "\tcurrent size: %lld sectors\n"
1001 "\tnative size: %lld sectors\n",
1002 (long long)sectors, (long long)hpa_sectors);
1004 if (ata_ignore_hpa) {
1005 if (ata_id_has_lba48(dev->id))
1006 hpa_sectors = ata_set_native_max_address_ext(dev, hpa_sectors);
1008 hpa_sectors = ata_set_native_max_address(dev,
1012 ata_dev_printk(dev, KERN_INFO, "native size "
1013 "increased to %lld sectors\n",
1014 (long long)hpa_sectors);
1022 static u64 ata_id_n_sectors(const u16 *id)
1024 if (ata_id_has_lba(id)) {
1025 if (ata_id_has_lba48(id))
1026 return ata_id_u64(id, 100);
1028 return ata_id_u32(id, 60);
1030 if (ata_id_current_chs_valid(id))
1031 return ata_id_u32(id, 57);
1033 return id[1] * id[3] * id[6];
1038 * ata_id_to_dma_mode - Identify DMA mode from id block
1039 * @dev: device to identify
1040 * @unknown: mode to assume if we cannot tell
1042 * Set up the timing values for the device based upon the identify
1043 * reported values for the DMA mode. This function is used by drivers
1044 * which rely upon firmware configured modes, but wish to report the
1045 * mode correctly when possible.
1047 * In addition we emit similarly formatted messages to the default
1048 * ata_dev_set_mode handler, in order to provide consistency of
1052 void ata_id_to_dma_mode(struct ata_device *dev, u8 unknown)
1057 /* Pack the DMA modes */
1058 mask = ((dev->id[63] >> 8) << ATA_SHIFT_MWDMA) & ATA_MASK_MWDMA;
1059 if (dev->id[53] & 0x04)
1060 mask |= ((dev->id[88] >> 8) << ATA_SHIFT_UDMA) & ATA_MASK_UDMA;
1062 /* Select the mode in use */
1063 mode = ata_xfer_mask2mode(mask);
1066 ata_dev_printk(dev, KERN_INFO, "configured for %s\n",
1067 ata_mode_string(mask));
1069 /* SWDMA perhaps ? */
1071 ata_dev_printk(dev, KERN_INFO, "configured for DMA\n");
1074 /* Configure the device reporting */
1075 dev->xfer_mode = mode;
1076 dev->xfer_shift = ata_xfer_mode2shift(mode);
1080 * ata_noop_dev_select - Select device 0/1 on ATA bus
1081 * @ap: ATA channel to manipulate
1082 * @device: ATA device (numbered from zero) to select
1084 * This function performs no actual function.
1086 * May be used as the dev_select() entry in ata_port_operations.
1091 void ata_noop_dev_select (struct ata_port *ap, unsigned int device)
1097 * ata_std_dev_select - Select device 0/1 on ATA bus
1098 * @ap: ATA channel to manipulate
1099 * @device: ATA device (numbered from zero) to select
1101 * Use the method defined in the ATA specification to
1102 * make either device 0, or device 1, active on the
1103 * ATA channel. Works with both PIO and MMIO.
1105 * May be used as the dev_select() entry in ata_port_operations.
1111 void ata_std_dev_select (struct ata_port *ap, unsigned int device)
1116 tmp = ATA_DEVICE_OBS;
1118 tmp = ATA_DEVICE_OBS | ATA_DEV1;
1120 iowrite8(tmp, ap->ioaddr.device_addr);
1121 ata_pause(ap); /* needed; also flushes, for mmio */
1125 * ata_dev_select - Select device 0/1 on ATA bus
1126 * @ap: ATA channel to manipulate
1127 * @device: ATA device (numbered from zero) to select
1128 * @wait: non-zero to wait for Status register BSY bit to clear
1129 * @can_sleep: non-zero if context allows sleeping
1131 * Use the method defined in the ATA specification to
1132 * make either device 0, or device 1, active on the
1135 * This is a high-level version of ata_std_dev_select(),
1136 * which additionally provides the services of inserting
1137 * the proper pauses and status polling, where needed.
1143 void ata_dev_select(struct ata_port *ap, unsigned int device,
1144 unsigned int wait, unsigned int can_sleep)
1146 if (ata_msg_probe(ap))
1147 ata_port_printk(ap, KERN_INFO, "ata_dev_select: ENTER, "
1148 "device %u, wait %u\n", device, wait);
1153 ap->ops->dev_select(ap, device);
1156 if (can_sleep && ap->device[device].class == ATA_DEV_ATAPI)
1163 * ata_dump_id - IDENTIFY DEVICE info debugging output
1164 * @id: IDENTIFY DEVICE page to dump
1166 * Dump selected 16-bit words from the given IDENTIFY DEVICE
1173 static inline void ata_dump_id(const u16 *id)
1175 DPRINTK("49==0x%04x "
1185 DPRINTK("80==0x%04x "
1195 DPRINTK("88==0x%04x "
1202 * ata_id_xfermask - Compute xfermask from the given IDENTIFY data
1203 * @id: IDENTIFY data to compute xfer mask from
1205 * Compute the xfermask for this device. This is not as trivial
1206 * as it seems if we must consider early devices correctly.
1208 * FIXME: pre IDE drive timing (do we care ?).
1216 static unsigned int ata_id_xfermask(const u16 *id)
1218 unsigned int pio_mask, mwdma_mask, udma_mask;
1220 /* Usual case. Word 53 indicates word 64 is valid */
1221 if (id[ATA_ID_FIELD_VALID] & (1 << 1)) {
1222 pio_mask = id[ATA_ID_PIO_MODES] & 0x03;
1226 /* If word 64 isn't valid then Word 51 high byte holds
1227 * the PIO timing number for the maximum. Turn it into
1230 u8 mode = (id[ATA_ID_OLD_PIO_MODES] >> 8) & 0xFF;
1231 if (mode < 5) /* Valid PIO range */
1232 pio_mask = (2 << mode) - 1;
1236 /* But wait.. there's more. Design your standards by
1237 * committee and you too can get a free iordy field to
1238 * process. However its the speeds not the modes that
1239 * are supported... Note drivers using the timing API
1240 * will get this right anyway
1244 mwdma_mask = id[ATA_ID_MWDMA_MODES] & 0x07;
1246 if (ata_id_is_cfa(id)) {
1248 * Process compact flash extended modes
1250 int pio = id[163] & 0x7;
1251 int dma = (id[163] >> 3) & 7;
1254 pio_mask |= (1 << 5);
1256 pio_mask |= (1 << 6);
1258 mwdma_mask |= (1 << 3);
1260 mwdma_mask |= (1 << 4);
1264 if (id[ATA_ID_FIELD_VALID] & (1 << 2))
1265 udma_mask = id[ATA_ID_UDMA_MODES] & 0xff;
1267 return ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask);
1271 * ata_port_queue_task - Queue port_task
1272 * @ap: The ata_port to queue port_task for
1273 * @fn: workqueue function to be scheduled
1274 * @data: data for @fn to use
1275 * @delay: delay time for workqueue function
1277 * Schedule @fn(@data) for execution after @delay jiffies using
1278 * port_task. There is one port_task per port and it's the
1279 * user(low level driver)'s responsibility to make sure that only
1280 * one task is active at any given time.
1282 * libata core layer takes care of synchronization between
1283 * port_task and EH. ata_port_queue_task() may be ignored for EH
1287 * Inherited from caller.
1289 void ata_port_queue_task(struct ata_port *ap, work_func_t fn, void *data,
1290 unsigned long delay)
1294 if (ap->pflags & ATA_PFLAG_FLUSH_PORT_TASK)
1297 PREPARE_DELAYED_WORK(&ap->port_task, fn);
1298 ap->port_task_data = data;
1300 rc = queue_delayed_work(ata_wq, &ap->port_task, delay);
1302 /* rc == 0 means that another user is using port task */
1307 * ata_port_flush_task - Flush port_task
1308 * @ap: The ata_port to flush port_task for
1310 * After this function completes, port_task is guranteed not to
1311 * be running or scheduled.
1314 * Kernel thread context (may sleep)
1316 void ata_port_flush_task(struct ata_port *ap)
1318 unsigned long flags;
1322 spin_lock_irqsave(ap->lock, flags);
1323 ap->pflags |= ATA_PFLAG_FLUSH_PORT_TASK;
1324 spin_unlock_irqrestore(ap->lock, flags);
1326 DPRINTK("flush #1\n");
1327 cancel_work_sync(&ap->port_task.work); /* akpm: seems unneeded */
1330 * At this point, if a task is running, it's guaranteed to see
1331 * the FLUSH flag; thus, it will never queue pio tasks again.
1334 if (!cancel_delayed_work(&ap->port_task)) {
1335 if (ata_msg_ctl(ap))
1336 ata_port_printk(ap, KERN_DEBUG, "%s: flush #2\n",
1338 cancel_work_sync(&ap->port_task.work);
1341 spin_lock_irqsave(ap->lock, flags);
1342 ap->pflags &= ~ATA_PFLAG_FLUSH_PORT_TASK;
1343 spin_unlock_irqrestore(ap->lock, flags);
1345 if (ata_msg_ctl(ap))
1346 ata_port_printk(ap, KERN_DEBUG, "%s: EXIT\n", __FUNCTION__);
1349 static void ata_qc_complete_internal(struct ata_queued_cmd *qc)
1351 struct completion *waiting = qc->private_data;
1357 * ata_exec_internal_sg - execute libata internal command
1358 * @dev: Device to which the command is sent
1359 * @tf: Taskfile registers for the command and the result
1360 * @cdb: CDB for packet command
1361 * @dma_dir: Data tranfer direction of the command
1362 * @sg: sg list for the data buffer of the command
1363 * @n_elem: Number of sg entries
1365 * Executes libata internal command with timeout. @tf contains
1366 * command on entry and result on return. Timeout and error
1367 * conditions are reported via return value. No recovery action
1368 * is taken after a command times out. It's caller's duty to
1369 * clean up after timeout.
1372 * None. Should be called with kernel context, might sleep.
1375 * Zero on success, AC_ERR_* mask on failure
1377 unsigned ata_exec_internal_sg(struct ata_device *dev,
1378 struct ata_taskfile *tf, const u8 *cdb,
1379 int dma_dir, struct scatterlist *sg,
1380 unsigned int n_elem)
1382 struct ata_port *ap = dev->ap;
1383 u8 command = tf->command;
1384 struct ata_queued_cmd *qc;
1385 unsigned int tag, preempted_tag;
1386 u32 preempted_sactive, preempted_qc_active;
1387 DECLARE_COMPLETION_ONSTACK(wait);
1388 unsigned long flags;
1389 unsigned int err_mask;
1392 spin_lock_irqsave(ap->lock, flags);
1394 /* no internal command while frozen */
1395 if (ap->pflags & ATA_PFLAG_FROZEN) {
1396 spin_unlock_irqrestore(ap->lock, flags);
1397 return AC_ERR_SYSTEM;
1400 /* initialize internal qc */
1402 /* XXX: Tag 0 is used for drivers with legacy EH as some
1403 * drivers choke if any other tag is given. This breaks
1404 * ata_tag_internal() test for those drivers. Don't use new
1405 * EH stuff without converting to it.
1407 if (ap->ops->error_handler)
1408 tag = ATA_TAG_INTERNAL;
1412 if (test_and_set_bit(tag, &ap->qc_allocated))
1414 qc = __ata_qc_from_tag(ap, tag);
1422 preempted_tag = ap->active_tag;
1423 preempted_sactive = ap->sactive;
1424 preempted_qc_active = ap->qc_active;
1425 ap->active_tag = ATA_TAG_POISON;
1429 /* prepare & issue qc */
1432 memcpy(qc->cdb, cdb, ATAPI_CDB_LEN);
1433 qc->flags |= ATA_QCFLAG_RESULT_TF;
1434 qc->dma_dir = dma_dir;
1435 if (dma_dir != DMA_NONE) {
1436 unsigned int i, buflen = 0;
1438 for (i = 0; i < n_elem; i++)
1439 buflen += sg[i].length;
1441 ata_sg_init(qc, sg, n_elem);
1442 qc->nbytes = buflen;
1445 qc->private_data = &wait;
1446 qc->complete_fn = ata_qc_complete_internal;
1450 spin_unlock_irqrestore(ap->lock, flags);
1452 rc = wait_for_completion_timeout(&wait, ata_probe_timeout);
1454 ata_port_flush_task(ap);
1457 spin_lock_irqsave(ap->lock, flags);
1459 /* We're racing with irq here. If we lose, the
1460 * following test prevents us from completing the qc
1461 * twice. If we win, the port is frozen and will be
1462 * cleaned up by ->post_internal_cmd().
1464 if (qc->flags & ATA_QCFLAG_ACTIVE) {
1465 qc->err_mask |= AC_ERR_TIMEOUT;
1467 if (ap->ops->error_handler)
1468 ata_port_freeze(ap);
1470 ata_qc_complete(qc);
1472 if (ata_msg_warn(ap))
1473 ata_dev_printk(dev, KERN_WARNING,
1474 "qc timeout (cmd 0x%x)\n", command);
1477 spin_unlock_irqrestore(ap->lock, flags);
1480 /* do post_internal_cmd */
1481 if (ap->ops->post_internal_cmd)
1482 ap->ops->post_internal_cmd(qc);
1484 /* perform minimal error analysis */
1485 if (qc->flags & ATA_QCFLAG_FAILED) {
1486 if (qc->result_tf.command & (ATA_ERR | ATA_DF))
1487 qc->err_mask |= AC_ERR_DEV;
1490 qc->err_mask |= AC_ERR_OTHER;
1492 if (qc->err_mask & ~AC_ERR_OTHER)
1493 qc->err_mask &= ~AC_ERR_OTHER;
1497 spin_lock_irqsave(ap->lock, flags);
1499 *tf = qc->result_tf;
1500 err_mask = qc->err_mask;
1503 ap->active_tag = preempted_tag;
1504 ap->sactive = preempted_sactive;
1505 ap->qc_active = preempted_qc_active;
1507 /* XXX - Some LLDDs (sata_mv) disable port on command failure.
1508 * Until those drivers are fixed, we detect the condition
1509 * here, fail the command with AC_ERR_SYSTEM and reenable the
1512 * Note that this doesn't change any behavior as internal
1513 * command failure results in disabling the device in the
1514 * higher layer for LLDDs without new reset/EH callbacks.
1516 * Kill the following code as soon as those drivers are fixed.
1518 if (ap->flags & ATA_FLAG_DISABLED) {
1519 err_mask |= AC_ERR_SYSTEM;
1523 spin_unlock_irqrestore(ap->lock, flags);
1529 * ata_exec_internal - execute libata internal command
1530 * @dev: Device to which the command is sent
1531 * @tf: Taskfile registers for the command and the result
1532 * @cdb: CDB for packet command
1533 * @dma_dir: Data tranfer direction of the command
1534 * @buf: Data buffer of the command
1535 * @buflen: Length of data buffer
1537 * Wrapper around ata_exec_internal_sg() which takes simple
1538 * buffer instead of sg list.
1541 * None. Should be called with kernel context, might sleep.
1544 * Zero on success, AC_ERR_* mask on failure
1546 unsigned ata_exec_internal(struct ata_device *dev,
1547 struct ata_taskfile *tf, const u8 *cdb,
1548 int dma_dir, void *buf, unsigned int buflen)
1550 struct scatterlist *psg = NULL, sg;
1551 unsigned int n_elem = 0;
1553 if (dma_dir != DMA_NONE) {
1555 sg_init_one(&sg, buf, buflen);
1560 return ata_exec_internal_sg(dev, tf, cdb, dma_dir, psg, n_elem);
1564 * ata_do_simple_cmd - execute simple internal command
1565 * @dev: Device to which the command is sent
1566 * @cmd: Opcode to execute
1568 * Execute a 'simple' command, that only consists of the opcode
1569 * 'cmd' itself, without filling any other registers
1572 * Kernel thread context (may sleep).
1575 * Zero on success, AC_ERR_* mask on failure
1577 unsigned int ata_do_simple_cmd(struct ata_device *dev, u8 cmd)
1579 struct ata_taskfile tf;
1581 ata_tf_init(dev, &tf);
1584 tf.flags |= ATA_TFLAG_DEVICE;
1585 tf.protocol = ATA_PROT_NODATA;
1587 return ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0);
1591 * ata_pio_need_iordy - check if iordy needed
1594 * Check if the current speed of the device requires IORDY. Used
1595 * by various controllers for chip configuration.
1598 unsigned int ata_pio_need_iordy(const struct ata_device *adev)
1600 /* Controller doesn't support IORDY. Probably a pointless check
1601 as the caller should know this */
1602 if (adev->ap->flags & ATA_FLAG_NO_IORDY)
1604 /* PIO3 and higher it is mandatory */
1605 if (adev->pio_mode > XFER_PIO_2)
1607 /* We turn it on when possible */
1608 if (ata_id_has_iordy(adev->id))
1614 * ata_pio_mask_no_iordy - Return the non IORDY mask
1617 * Compute the highest mode possible if we are not using iordy. Return
1618 * -1 if no iordy mode is available.
1621 static u32 ata_pio_mask_no_iordy(const struct ata_device *adev)
1623 /* If we have no drive specific rule, then PIO 2 is non IORDY */
1624 if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE */
1625 u16 pio = adev->id[ATA_ID_EIDE_PIO];
1626 /* Is the speed faster than the drive allows non IORDY ? */
1628 /* This is cycle times not frequency - watch the logic! */
1629 if (pio > 240) /* PIO2 is 240nS per cycle */
1630 return 3 << ATA_SHIFT_PIO;
1631 return 7 << ATA_SHIFT_PIO;
1634 return 3 << ATA_SHIFT_PIO;
1638 * ata_dev_read_id - Read ID data from the specified device
1639 * @dev: target device
1640 * @p_class: pointer to class of the target device (may be changed)
1641 * @flags: ATA_READID_* flags
1642 * @id: buffer to read IDENTIFY data into
1644 * Read ID data from the specified device. ATA_CMD_ID_ATA is
1645 * performed on ATA devices and ATA_CMD_ID_ATAPI on ATAPI
1646 * devices. This function also issues ATA_CMD_INIT_DEV_PARAMS
1647 * for pre-ATA4 drives.
1650 * Kernel thread context (may sleep)
1653 * 0 on success, -errno otherwise.
1655 int ata_dev_read_id(struct ata_device *dev, unsigned int *p_class,
1656 unsigned int flags, u16 *id)
1658 struct ata_port *ap = dev->ap;
1659 unsigned int class = *p_class;
1660 struct ata_taskfile tf;
1661 unsigned int err_mask = 0;
1663 int tried_spinup = 0;
1666 if (ata_msg_ctl(ap))
1667 ata_dev_printk(dev, KERN_DEBUG, "%s: ENTER\n", __FUNCTION__);
1669 ata_dev_select(ap, dev->devno, 1, 1); /* select device 0/1 */
1671 ata_tf_init(dev, &tf);
1675 tf.command = ATA_CMD_ID_ATA;
1678 tf.command = ATA_CMD_ID_ATAPI;
1682 reason = "unsupported class";
1686 tf.protocol = ATA_PROT_PIO;
1688 /* Some devices choke if TF registers contain garbage. Make
1689 * sure those are properly initialized.
1691 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
1693 /* Device presence detection is unreliable on some
1694 * controllers. Always poll IDENTIFY if available.
1696 tf.flags |= ATA_TFLAG_POLLING;
1698 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_FROM_DEVICE,
1699 id, sizeof(id[0]) * ATA_ID_WORDS);
1701 if (err_mask & AC_ERR_NODEV_HINT) {
1702 DPRINTK("ata%u.%d: NODEV after polling detection\n",
1703 ap->print_id, dev->devno);
1708 reason = "I/O error";
1712 swap_buf_le16(id, ATA_ID_WORDS);
1716 reason = "device reports illegal type";
1718 if (class == ATA_DEV_ATA) {
1719 if (!ata_id_is_ata(id) && !ata_id_is_cfa(id))
1722 if (ata_id_is_ata(id))
1726 if (!tried_spinup && (id[2] == 0x37c8 || id[2] == 0x738c)) {
1729 * Drive powered-up in standby mode, and requires a specific
1730 * SET_FEATURES spin-up subcommand before it will accept
1731 * anything other than the original IDENTIFY command.
1733 ata_tf_init(dev, &tf);
1734 tf.command = ATA_CMD_SET_FEATURES;
1735 tf.feature = SETFEATURES_SPINUP;
1736 tf.protocol = ATA_PROT_NODATA;
1737 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
1738 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0);
1741 reason = "SPINUP failed";
1745 * If the drive initially returned incomplete IDENTIFY info,
1746 * we now must reissue the IDENTIFY command.
1748 if (id[2] == 0x37c8)
1752 if ((flags & ATA_READID_POSTRESET) && class == ATA_DEV_ATA) {
1754 * The exact sequence expected by certain pre-ATA4 drives is:
1757 * INITIALIZE DEVICE PARAMETERS
1759 * Some drives were very specific about that exact sequence.
1761 if (ata_id_major_version(id) < 4 || !ata_id_has_lba(id)) {
1762 err_mask = ata_dev_init_params(dev, id[3], id[6]);
1765 reason = "INIT_DEV_PARAMS failed";
1769 /* current CHS translation info (id[53-58]) might be
1770 * changed. reread the identify device info.
1772 flags &= ~ATA_READID_POSTRESET;
1782 if (ata_msg_warn(ap))
1783 ata_dev_printk(dev, KERN_WARNING, "failed to IDENTIFY "
1784 "(%s, err_mask=0x%x)\n", reason, err_mask);
1788 static inline u8 ata_dev_knobble(struct ata_device *dev)
1790 return ((dev->ap->cbl == ATA_CBL_SATA) && (!ata_id_is_sata(dev->id)));
1793 static void ata_dev_config_ncq(struct ata_device *dev,
1794 char *desc, size_t desc_sz)
1796 struct ata_port *ap = dev->ap;
1797 int hdepth = 0, ddepth = ata_id_queue_depth(dev->id);
1799 if (!ata_id_has_ncq(dev->id)) {
1803 if (ata_device_blacklisted(dev) & ATA_HORKAGE_NONCQ) {
1804 snprintf(desc, desc_sz, "NCQ (not used)");
1807 if (ap->flags & ATA_FLAG_NCQ) {
1808 hdepth = min(ap->scsi_host->can_queue, ATA_MAX_QUEUE - 1);
1809 dev->flags |= ATA_DFLAG_NCQ;
1812 if (hdepth >= ddepth)
1813 snprintf(desc, desc_sz, "NCQ (depth %d)", ddepth);
1815 snprintf(desc, desc_sz, "NCQ (depth %d/%d)", hdepth, ddepth);
1819 * ata_dev_configure - Configure the specified ATA/ATAPI device
1820 * @dev: Target device to configure
1822 * Configure @dev according to @dev->id. Generic and low-level
1823 * driver specific fixups are also applied.
1826 * Kernel thread context (may sleep)
1829 * 0 on success, -errno otherwise
1831 int ata_dev_configure(struct ata_device *dev)
1833 struct ata_port *ap = dev->ap;
1834 int print_info = ap->eh_context.i.flags & ATA_EHI_PRINTINFO;
1835 const u16 *id = dev->id;
1836 unsigned int xfer_mask;
1837 char revbuf[7]; /* XYZ-99\0 */
1838 char fwrevbuf[ATA_ID_FW_REV_LEN+1];
1839 char modelbuf[ATA_ID_PROD_LEN+1];
1842 if (!ata_dev_enabled(dev) && ata_msg_info(ap)) {
1843 ata_dev_printk(dev, KERN_INFO, "%s: ENTER/EXIT -- nodev\n",
1848 if (ata_msg_probe(ap))
1849 ata_dev_printk(dev, KERN_DEBUG, "%s: ENTER\n", __FUNCTION__);
1852 rc = ata_acpi_push_id(ap, dev->devno);
1854 ata_dev_printk(dev, KERN_WARNING, "failed to set _SDD(%d)\n",
1858 /* retrieve and execute the ATA task file of _GTF */
1859 ata_acpi_exec_tfs(ap);
1861 /* print device capabilities */
1862 if (ata_msg_probe(ap))
1863 ata_dev_printk(dev, KERN_DEBUG,
1864 "%s: cfg 49:%04x 82:%04x 83:%04x 84:%04x "
1865 "85:%04x 86:%04x 87:%04x 88:%04x\n",
1867 id[49], id[82], id[83], id[84],
1868 id[85], id[86], id[87], id[88]);
1870 /* initialize to-be-configured parameters */
1871 dev->flags &= ~ATA_DFLAG_CFG_MASK;
1872 dev->max_sectors = 0;
1880 * common ATA, ATAPI feature tests
1883 /* find max transfer mode; for printk only */
1884 xfer_mask = ata_id_xfermask(id);
1886 if (ata_msg_probe(ap))
1889 /* ATA-specific feature tests */
1890 if (dev->class == ATA_DEV_ATA) {
1891 if (ata_id_is_cfa(id)) {
1892 if (id[162] & 1) /* CPRM may make this media unusable */
1893 ata_dev_printk(dev, KERN_WARNING,
1894 "supports DRM functions and may "
1895 "not be fully accessable.\n");
1896 snprintf(revbuf, 7, "CFA");
1899 snprintf(revbuf, 7, "ATA-%d", ata_id_major_version(id));
1901 dev->n_sectors = ata_id_n_sectors(id);
1902 dev->n_sectors_boot = dev->n_sectors;
1904 /* SCSI only uses 4-char revisions, dump full 8 chars from ATA */
1905 ata_id_c_string(dev->id, fwrevbuf, ATA_ID_FW_REV,
1908 ata_id_c_string(dev->id, modelbuf, ATA_ID_PROD,
1911 if (dev->id[59] & 0x100)
1912 dev->multi_count = dev->id[59] & 0xff;
1914 if (ata_id_has_lba(id)) {
1915 const char *lba_desc;
1919 dev->flags |= ATA_DFLAG_LBA;
1920 if (ata_id_has_lba48(id)) {
1921 dev->flags |= ATA_DFLAG_LBA48;
1924 if (dev->n_sectors >= (1UL << 28) &&
1925 ata_id_has_flush_ext(id))
1926 dev->flags |= ATA_DFLAG_FLUSH_EXT;
1929 if (ata_id_hpa_enabled(dev->id))
1930 dev->n_sectors = ata_hpa_resize(dev);
1933 ata_dev_config_ncq(dev, ncq_desc, sizeof(ncq_desc));
1935 /* print device info to dmesg */
1936 if (ata_msg_drv(ap) && print_info) {
1937 ata_dev_printk(dev, KERN_INFO,
1938 "%s: %s, %s, max %s\n",
1939 revbuf, modelbuf, fwrevbuf,
1940 ata_mode_string(xfer_mask));
1941 ata_dev_printk(dev, KERN_INFO,
1942 "%Lu sectors, multi %u: %s %s\n",
1943 (unsigned long long)dev->n_sectors,
1944 dev->multi_count, lba_desc, ncq_desc);
1949 /* Default translation */
1950 dev->cylinders = id[1];
1952 dev->sectors = id[6];
1954 if (ata_id_current_chs_valid(id)) {
1955 /* Current CHS translation is valid. */
1956 dev->cylinders = id[54];
1957 dev->heads = id[55];
1958 dev->sectors = id[56];
1961 /* print device info to dmesg */
1962 if (ata_msg_drv(ap) && print_info) {
1963 ata_dev_printk(dev, KERN_INFO,
1964 "%s: %s, %s, max %s\n",
1965 revbuf, modelbuf, fwrevbuf,
1966 ata_mode_string(xfer_mask));
1967 ata_dev_printk(dev, KERN_INFO,
1968 "%Lu sectors, multi %u, CHS %u/%u/%u\n",
1969 (unsigned long long)dev->n_sectors,
1970 dev->multi_count, dev->cylinders,
1971 dev->heads, dev->sectors);
1978 /* ATAPI-specific feature tests */
1979 else if (dev->class == ATA_DEV_ATAPI) {
1980 char *cdb_intr_string = "";
1982 rc = atapi_cdb_len(id);
1983 if ((rc < 12) || (rc > ATAPI_CDB_LEN)) {
1984 if (ata_msg_warn(ap))
1985 ata_dev_printk(dev, KERN_WARNING,
1986 "unsupported CDB len\n");
1990 dev->cdb_len = (unsigned int) rc;
1992 if (ata_id_cdb_intr(dev->id)) {
1993 dev->flags |= ATA_DFLAG_CDB_INTR;
1994 cdb_intr_string = ", CDB intr";
1997 /* print device info to dmesg */
1998 if (ata_msg_drv(ap) && print_info)
1999 ata_dev_printk(dev, KERN_INFO, "ATAPI, max %s%s\n",
2000 ata_mode_string(xfer_mask),
2004 /* determine max_sectors */
2005 dev->max_sectors = ATA_MAX_SECTORS;
2006 if (dev->flags & ATA_DFLAG_LBA48)
2007 dev->max_sectors = ATA_MAX_SECTORS_LBA48;
2009 if (dev->horkage & ATA_HORKAGE_DIAGNOSTIC) {
2010 /* Let the user know. We don't want to disallow opens for
2011 rescue purposes, or in case the vendor is just a blithering
2014 ata_dev_printk(dev, KERN_WARNING,
2015 "Drive reports diagnostics failure. This may indicate a drive\n");
2016 ata_dev_printk(dev, KERN_WARNING,
2017 "fault or invalid emulation. Contact drive vendor for information.\n");
2021 /* limit bridge transfers to udma5, 200 sectors */
2022 if (ata_dev_knobble(dev)) {
2023 if (ata_msg_drv(ap) && print_info)
2024 ata_dev_printk(dev, KERN_INFO,
2025 "applying bridge limits\n");
2026 dev->udma_mask &= ATA_UDMA5;
2027 dev->max_sectors = ATA_MAX_SECTORS;
2030 if (ata_device_blacklisted(dev) & ATA_HORKAGE_MAX_SEC_128)
2031 dev->max_sectors = min_t(unsigned int, ATA_MAX_SECTORS_128,
2034 /* limit ATAPI DMA to R/W commands only */
2035 if (ata_device_blacklisted(dev) & ATA_HORKAGE_DMA_RW_ONLY)
2036 dev->horkage |= ATA_HORKAGE_DMA_RW_ONLY;
2038 if (ap->ops->dev_config)
2039 ap->ops->dev_config(dev);
2041 if (ata_msg_probe(ap))
2042 ata_dev_printk(dev, KERN_DEBUG, "%s: EXIT, drv_stat = 0x%x\n",
2043 __FUNCTION__, ata_chk_status(ap));
2047 if (ata_msg_probe(ap))
2048 ata_dev_printk(dev, KERN_DEBUG,
2049 "%s: EXIT, err\n", __FUNCTION__);
2054 * ata_cable_40wire - return 40 wire cable type
2057 * Helper method for drivers which want to hardwire 40 wire cable
2061 int ata_cable_40wire(struct ata_port *ap)
2063 return ATA_CBL_PATA40;
2067 * ata_cable_80wire - return 80 wire cable type
2070 * Helper method for drivers which want to hardwire 80 wire cable
2074 int ata_cable_80wire(struct ata_port *ap)
2076 return ATA_CBL_PATA80;
2080 * ata_cable_unknown - return unknown PATA cable.
2083 * Helper method for drivers which have no PATA cable detection.
2086 int ata_cable_unknown(struct ata_port *ap)
2088 return ATA_CBL_PATA_UNK;
2092 * ata_cable_sata - return SATA cable type
2095 * Helper method for drivers which have SATA cables
2098 int ata_cable_sata(struct ata_port *ap)
2100 return ATA_CBL_SATA;
2104 * ata_bus_probe - Reset and probe ATA bus
2107 * Master ATA bus probing function. Initiates a hardware-dependent
2108 * bus reset, then attempts to identify any devices found on
2112 * PCI/etc. bus probe sem.
2115 * Zero on success, negative errno otherwise.
2118 int ata_bus_probe(struct ata_port *ap)
2120 unsigned int classes[ATA_MAX_DEVICES];
2121 int tries[ATA_MAX_DEVICES];
2123 struct ata_device *dev;
2127 for (i = 0; i < ATA_MAX_DEVICES; i++)
2128 tries[i] = ATA_PROBE_MAX_TRIES;
2131 /* reset and determine device classes */
2132 ap->ops->phy_reset(ap);
2134 for (i = 0; i < ATA_MAX_DEVICES; i++) {
2135 dev = &ap->device[i];
2137 if (!(ap->flags & ATA_FLAG_DISABLED) &&
2138 dev->class != ATA_DEV_UNKNOWN)
2139 classes[dev->devno] = dev->class;
2141 classes[dev->devno] = ATA_DEV_NONE;
2143 dev->class = ATA_DEV_UNKNOWN;
2148 /* after the reset the device state is PIO 0 and the controller
2149 state is undefined. Record the mode */
2151 for (i = 0; i < ATA_MAX_DEVICES; i++)
2152 ap->device[i].pio_mode = XFER_PIO_0;
2154 /* read IDENTIFY page and configure devices. We have to do the identify
2155 specific sequence bass-ackwards so that PDIAG- is released by
2158 for (i = ATA_MAX_DEVICES - 1; i >= 0; i--) {
2159 dev = &ap->device[i];
2162 dev->class = classes[i];
2164 if (!ata_dev_enabled(dev))
2167 rc = ata_dev_read_id(dev, &dev->class, ATA_READID_POSTRESET,
2173 /* Now ask for the cable type as PDIAG- should have been released */
2174 if (ap->ops->cable_detect)
2175 ap->cbl = ap->ops->cable_detect(ap);
2177 /* After the identify sequence we can now set up the devices. We do
2178 this in the normal order so that the user doesn't get confused */
2180 for(i = 0; i < ATA_MAX_DEVICES; i++) {
2181 dev = &ap->device[i];
2182 if (!ata_dev_enabled(dev))
2185 ap->eh_context.i.flags |= ATA_EHI_PRINTINFO;
2186 rc = ata_dev_configure(dev);
2187 ap->eh_context.i.flags &= ~ATA_EHI_PRINTINFO;
2192 /* configure transfer mode */
2193 rc = ata_set_mode(ap, &dev);
2197 for (i = 0; i < ATA_MAX_DEVICES; i++)
2198 if (ata_dev_enabled(&ap->device[i]))
2201 /* no device present, disable port */
2202 ata_port_disable(ap);
2203 ap->ops->port_disable(ap);
2207 tries[dev->devno]--;
2211 /* eeek, something went very wrong, give up */
2212 tries[dev->devno] = 0;
2216 /* give it just one more chance */
2217 tries[dev->devno] = min(tries[dev->devno], 1);
2219 if (tries[dev->devno] == 1) {
2220 /* This is the last chance, better to slow
2221 * down than lose it.
2223 sata_down_spd_limit(ap);
2224 ata_down_xfermask_limit(dev, ATA_DNXFER_PIO);
2228 if (!tries[dev->devno])
2229 ata_dev_disable(dev);
2235 * ata_port_probe - Mark port as enabled
2236 * @ap: Port for which we indicate enablement
2238 * Modify @ap data structure such that the system
2239 * thinks that the entire port is enabled.
2241 * LOCKING: host lock, or some other form of
2245 void ata_port_probe(struct ata_port *ap)
2247 ap->flags &= ~ATA_FLAG_DISABLED;
2251 * sata_print_link_status - Print SATA link status
2252 * @ap: SATA port to printk link status about
2254 * This function prints link speed and status of a SATA link.
2259 void sata_print_link_status(struct ata_port *ap)
2261 u32 sstatus, scontrol, tmp;
2263 if (sata_scr_read(ap, SCR_STATUS, &sstatus))
2265 sata_scr_read(ap, SCR_CONTROL, &scontrol);
2267 if (ata_port_online(ap)) {
2268 tmp = (sstatus >> 4) & 0xf;
2269 ata_port_printk(ap, KERN_INFO,
2270 "SATA link up %s (SStatus %X SControl %X)\n",
2271 sata_spd_string(tmp), sstatus, scontrol);
2273 ata_port_printk(ap, KERN_INFO,
2274 "SATA link down (SStatus %X SControl %X)\n",
2280 * __sata_phy_reset - Wake/reset a low-level SATA PHY
2281 * @ap: SATA port associated with target SATA PHY.
2283 * This function issues commands to standard SATA Sxxx
2284 * PHY registers, to wake up the phy (and device), and
2285 * clear any reset condition.
2288 * PCI/etc. bus probe sem.
2291 void __sata_phy_reset(struct ata_port *ap)
2294 unsigned long timeout = jiffies + (HZ * 5);
2296 if (ap->flags & ATA_FLAG_SATA_RESET) {
2297 /* issue phy wake/reset */
2298 sata_scr_write_flush(ap, SCR_CONTROL, 0x301);
2299 /* Couldn't find anything in SATA I/II specs, but
2300 * AHCI-1.1 10.4.2 says at least 1 ms. */
2303 /* phy wake/clear reset */
2304 sata_scr_write_flush(ap, SCR_CONTROL, 0x300);
2306 /* wait for phy to become ready, if necessary */
2309 sata_scr_read(ap, SCR_STATUS, &sstatus);
2310 if ((sstatus & 0xf) != 1)
2312 } while (time_before(jiffies, timeout));
2314 /* print link status */
2315 sata_print_link_status(ap);
2317 /* TODO: phy layer with polling, timeouts, etc. */
2318 if (!ata_port_offline(ap))
2321 ata_port_disable(ap);
2323 if (ap->flags & ATA_FLAG_DISABLED)
2326 if (ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT)) {
2327 ata_port_disable(ap);
2331 ap->cbl = ATA_CBL_SATA;
2335 * sata_phy_reset - Reset SATA bus.
2336 * @ap: SATA port associated with target SATA PHY.
2338 * This function resets the SATA bus, and then probes
2339 * the bus for devices.
2342 * PCI/etc. bus probe sem.
2345 void sata_phy_reset(struct ata_port *ap)
2347 __sata_phy_reset(ap);
2348 if (ap->flags & ATA_FLAG_DISABLED)
2354 * ata_dev_pair - return other device on cable
2357 * Obtain the other device on the same cable, or if none is
2358 * present NULL is returned
2361 struct ata_device *ata_dev_pair(struct ata_device *adev)
2363 struct ata_port *ap = adev->ap;
2364 struct ata_device *pair = &ap->device[1 - adev->devno];
2365 if (!ata_dev_enabled(pair))
2371 * ata_port_disable - Disable port.
2372 * @ap: Port to be disabled.
2374 * Modify @ap data structure such that the system
2375 * thinks that the entire port is disabled, and should
2376 * never attempt to probe or communicate with devices
2379 * LOCKING: host lock, or some other form of
2383 void ata_port_disable(struct ata_port *ap)
2385 ap->device[0].class = ATA_DEV_NONE;
2386 ap->device[1].class = ATA_DEV_NONE;
2387 ap->flags |= ATA_FLAG_DISABLED;
2391 * sata_down_spd_limit - adjust SATA spd limit downward
2392 * @ap: Port to adjust SATA spd limit for
2394 * Adjust SATA spd limit of @ap downward. Note that this
2395 * function only adjusts the limit. The change must be applied
2396 * using sata_set_spd().
2399 * Inherited from caller.
2402 * 0 on success, negative errno on failure
2404 int sata_down_spd_limit(struct ata_port *ap)
2406 u32 sstatus, spd, mask;
2409 rc = sata_scr_read(ap, SCR_STATUS, &sstatus);
2413 mask = ap->sata_spd_limit;
2416 highbit = fls(mask) - 1;
2417 mask &= ~(1 << highbit);
2419 spd = (sstatus >> 4) & 0xf;
2423 mask &= (1 << spd) - 1;
2427 ap->sata_spd_limit = mask;
2429 ata_port_printk(ap, KERN_WARNING, "limiting SATA link speed to %s\n",
2430 sata_spd_string(fls(mask)));
2435 static int __sata_set_spd_needed(struct ata_port *ap, u32 *scontrol)
2439 if (ap->sata_spd_limit == UINT_MAX)
2442 limit = fls(ap->sata_spd_limit);
2444 spd = (*scontrol >> 4) & 0xf;
2445 *scontrol = (*scontrol & ~0xf0) | ((limit & 0xf) << 4);
2447 return spd != limit;
2451 * sata_set_spd_needed - is SATA spd configuration needed
2452 * @ap: Port in question
2454 * Test whether the spd limit in SControl matches
2455 * @ap->sata_spd_limit. This function is used to determine
2456 * whether hardreset is necessary to apply SATA spd
2460 * Inherited from caller.
2463 * 1 if SATA spd configuration is needed, 0 otherwise.
2465 int sata_set_spd_needed(struct ata_port *ap)
2469 if (sata_scr_read(ap, SCR_CONTROL, &scontrol))
2472 return __sata_set_spd_needed(ap, &scontrol);
2476 * sata_set_spd - set SATA spd according to spd limit
2477 * @ap: Port to set SATA spd for
2479 * Set SATA spd of @ap according to sata_spd_limit.
2482 * Inherited from caller.
2485 * 0 if spd doesn't need to be changed, 1 if spd has been
2486 * changed. Negative errno if SCR registers are inaccessible.
2488 int sata_set_spd(struct ata_port *ap)
2493 if ((rc = sata_scr_read(ap, SCR_CONTROL, &scontrol)))
2496 if (!__sata_set_spd_needed(ap, &scontrol))
2499 if ((rc = sata_scr_write(ap, SCR_CONTROL, scontrol)))
2506 * This mode timing computation functionality is ported over from
2507 * drivers/ide/ide-timing.h and was originally written by Vojtech Pavlik
2510 * PIO 0-4, MWDMA 0-2 and UDMA 0-6 timings (in nanoseconds).
2511 * These were taken from ATA/ATAPI-6 standard, rev 0a, except
2512 * for UDMA6, which is currently supported only by Maxtor drives.
2514 * For PIO 5/6 MWDMA 3/4 see the CFA specification 3.0.
2517 static const struct ata_timing ata_timing[] = {
2519 { XFER_UDMA_6, 0, 0, 0, 0, 0, 0, 0, 15 },
2520 { XFER_UDMA_5, 0, 0, 0, 0, 0, 0, 0, 20 },
2521 { XFER_UDMA_4, 0, 0, 0, 0, 0, 0, 0, 30 },
2522 { XFER_UDMA_3, 0, 0, 0, 0, 0, 0, 0, 45 },
2524 { XFER_MW_DMA_4, 25, 0, 0, 0, 55, 20, 80, 0 },
2525 { XFER_MW_DMA_3, 25, 0, 0, 0, 65, 25, 100, 0 },
2526 { XFER_UDMA_2, 0, 0, 0, 0, 0, 0, 0, 60 },
2527 { XFER_UDMA_1, 0, 0, 0, 0, 0, 0, 0, 80 },
2528 { XFER_UDMA_0, 0, 0, 0, 0, 0, 0, 0, 120 },
2530 /* { XFER_UDMA_SLOW, 0, 0, 0, 0, 0, 0, 0, 150 }, */
2532 { XFER_MW_DMA_2, 25, 0, 0, 0, 70, 25, 120, 0 },
2533 { XFER_MW_DMA_1, 45, 0, 0, 0, 80, 50, 150, 0 },
2534 { XFER_MW_DMA_0, 60, 0, 0, 0, 215, 215, 480, 0 },
2536 { XFER_SW_DMA_2, 60, 0, 0, 0, 120, 120, 240, 0 },
2537 { XFER_SW_DMA_1, 90, 0, 0, 0, 240, 240, 480, 0 },
2538 { XFER_SW_DMA_0, 120, 0, 0, 0, 480, 480, 960, 0 },
2540 { XFER_PIO_6, 10, 55, 20, 80, 55, 20, 80, 0 },
2541 { XFER_PIO_5, 15, 65, 25, 100, 65, 25, 100, 0 },
2542 { XFER_PIO_4, 25, 70, 25, 120, 70, 25, 120, 0 },
2543 { XFER_PIO_3, 30, 80, 70, 180, 80, 70, 180, 0 },
2545 { XFER_PIO_2, 30, 290, 40, 330, 100, 90, 240, 0 },
2546 { XFER_PIO_1, 50, 290, 93, 383, 125, 100, 383, 0 },
2547 { XFER_PIO_0, 70, 290, 240, 600, 165, 150, 600, 0 },
2549 /* { XFER_PIO_SLOW, 120, 290, 240, 960, 290, 240, 960, 0 }, */
2554 #define ENOUGH(v,unit) (((v)-1)/(unit)+1)
2555 #define EZ(v,unit) ((v)?ENOUGH(v,unit):0)
2557 static void ata_timing_quantize(const struct ata_timing *t, struct ata_timing *q, int T, int UT)
2559 q->setup = EZ(t->setup * 1000, T);
2560 q->act8b = EZ(t->act8b * 1000, T);
2561 q->rec8b = EZ(t->rec8b * 1000, T);
2562 q->cyc8b = EZ(t->cyc8b * 1000, T);
2563 q->active = EZ(t->active * 1000, T);
2564 q->recover = EZ(t->recover * 1000, T);
2565 q->cycle = EZ(t->cycle * 1000, T);
2566 q->udma = EZ(t->udma * 1000, UT);
2569 void ata_timing_merge(const struct ata_timing *a, const struct ata_timing *b,
2570 struct ata_timing *m, unsigned int what)
2572 if (what & ATA_TIMING_SETUP ) m->setup = max(a->setup, b->setup);
2573 if (what & ATA_TIMING_ACT8B ) m->act8b = max(a->act8b, b->act8b);
2574 if (what & ATA_TIMING_REC8B ) m->rec8b = max(a->rec8b, b->rec8b);
2575 if (what & ATA_TIMING_CYC8B ) m->cyc8b = max(a->cyc8b, b->cyc8b);
2576 if (what & ATA_TIMING_ACTIVE ) m->active = max(a->active, b->active);
2577 if (what & ATA_TIMING_RECOVER) m->recover = max(a->recover, b->recover);
2578 if (what & ATA_TIMING_CYCLE ) m->cycle = max(a->cycle, b->cycle);
2579 if (what & ATA_TIMING_UDMA ) m->udma = max(a->udma, b->udma);
2582 static const struct ata_timing* ata_timing_find_mode(unsigned short speed)
2584 const struct ata_timing *t;
2586 for (t = ata_timing; t->mode != speed; t++)
2587 if (t->mode == 0xFF)
2592 int ata_timing_compute(struct ata_device *adev, unsigned short speed,
2593 struct ata_timing *t, int T, int UT)
2595 const struct ata_timing *s;
2596 struct ata_timing p;
2602 if (!(s = ata_timing_find_mode(speed)))
2605 memcpy(t, s, sizeof(*s));
2608 * If the drive is an EIDE drive, it can tell us it needs extended
2609 * PIO/MW_DMA cycle timing.
2612 if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE drive */
2613 memset(&p, 0, sizeof(p));
2614 if(speed >= XFER_PIO_0 && speed <= XFER_SW_DMA_0) {
2615 if (speed <= XFER_PIO_2) p.cycle = p.cyc8b = adev->id[ATA_ID_EIDE_PIO];
2616 else p.cycle = p.cyc8b = adev->id[ATA_ID_EIDE_PIO_IORDY];
2617 } else if(speed >= XFER_MW_DMA_0 && speed <= XFER_MW_DMA_2) {
2618 p.cycle = adev->id[ATA_ID_EIDE_DMA_MIN];
2620 ata_timing_merge(&p, t, t, ATA_TIMING_CYCLE | ATA_TIMING_CYC8B);
2624 * Convert the timing to bus clock counts.
2627 ata_timing_quantize(t, t, T, UT);
2630 * Even in DMA/UDMA modes we still use PIO access for IDENTIFY,
2631 * S.M.A.R.T * and some other commands. We have to ensure that the
2632 * DMA cycle timing is slower/equal than the fastest PIO timing.
2635 if (speed > XFER_PIO_6) {
2636 ata_timing_compute(adev, adev->pio_mode, &p, T, UT);
2637 ata_timing_merge(&p, t, t, ATA_TIMING_ALL);
2641 * Lengthen active & recovery time so that cycle time is correct.
2644 if (t->act8b + t->rec8b < t->cyc8b) {
2645 t->act8b += (t->cyc8b - (t->act8b + t->rec8b)) / 2;
2646 t->rec8b = t->cyc8b - t->act8b;
2649 if (t->active + t->recover < t->cycle) {
2650 t->active += (t->cycle - (t->active + t->recover)) / 2;
2651 t->recover = t->cycle - t->active;
2654 /* In a few cases quantisation may produce enough errors to
2655 leave t->cycle too low for the sum of active and recovery
2656 if so we must correct this */
2657 if (t->active + t->recover > t->cycle)
2658 t->cycle = t->active + t->recover;
2664 * ata_down_xfermask_limit - adjust dev xfer masks downward
2665 * @dev: Device to adjust xfer masks
2666 * @sel: ATA_DNXFER_* selector
2668 * Adjust xfer masks of @dev downward. Note that this function
2669 * does not apply the change. Invoking ata_set_mode() afterwards
2670 * will apply the limit.
2673 * Inherited from caller.
2676 * 0 on success, negative errno on failure
2678 int ata_down_xfermask_limit(struct ata_device *dev, unsigned int sel)
2681 unsigned int orig_mask, xfer_mask;
2682 unsigned int pio_mask, mwdma_mask, udma_mask;
2685 quiet = !!(sel & ATA_DNXFER_QUIET);
2686 sel &= ~ATA_DNXFER_QUIET;
2688 xfer_mask = orig_mask = ata_pack_xfermask(dev->pio_mask,
2691 ata_unpack_xfermask(xfer_mask, &pio_mask, &mwdma_mask, &udma_mask);
2694 case ATA_DNXFER_PIO:
2695 highbit = fls(pio_mask) - 1;
2696 pio_mask &= ~(1 << highbit);
2699 case ATA_DNXFER_DMA:
2701 highbit = fls(udma_mask) - 1;
2702 udma_mask &= ~(1 << highbit);
2705 } else if (mwdma_mask) {
2706 highbit = fls(mwdma_mask) - 1;
2707 mwdma_mask &= ~(1 << highbit);
2713 case ATA_DNXFER_40C:
2714 udma_mask &= ATA_UDMA_MASK_40C;
2717 case ATA_DNXFER_FORCE_PIO0:
2719 case ATA_DNXFER_FORCE_PIO:
2728 xfer_mask &= ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask);
2730 if (!(xfer_mask & ATA_MASK_PIO) || xfer_mask == orig_mask)
2734 if (xfer_mask & (ATA_MASK_MWDMA | ATA_MASK_UDMA))
2735 snprintf(buf, sizeof(buf), "%s:%s",
2736 ata_mode_string(xfer_mask),
2737 ata_mode_string(xfer_mask & ATA_MASK_PIO));
2739 snprintf(buf, sizeof(buf), "%s",
2740 ata_mode_string(xfer_mask));
2742 ata_dev_printk(dev, KERN_WARNING,
2743 "limiting speed to %s\n", buf);
2746 ata_unpack_xfermask(xfer_mask, &dev->pio_mask, &dev->mwdma_mask,
2752 static int ata_dev_set_mode(struct ata_device *dev)
2754 struct ata_eh_context *ehc = &dev->ap->eh_context;
2755 unsigned int err_mask;
2758 dev->flags &= ~ATA_DFLAG_PIO;
2759 if (dev->xfer_shift == ATA_SHIFT_PIO)
2760 dev->flags |= ATA_DFLAG_PIO;
2762 err_mask = ata_dev_set_xfermode(dev);
2763 /* Old CFA may refuse this command, which is just fine */
2764 if (dev->xfer_shift == ATA_SHIFT_PIO && ata_id_is_cfa(dev->id))
2765 err_mask &= ~AC_ERR_DEV;
2768 ata_dev_printk(dev, KERN_ERR, "failed to set xfermode "
2769 "(err_mask=0x%x)\n", err_mask);
2773 ehc->i.flags |= ATA_EHI_POST_SETMODE;
2774 rc = ata_dev_revalidate(dev, 0);
2775 ehc->i.flags &= ~ATA_EHI_POST_SETMODE;
2779 DPRINTK("xfer_shift=%u, xfer_mode=0x%x\n",
2780 dev->xfer_shift, (int)dev->xfer_mode);
2782 ata_dev_printk(dev, KERN_INFO, "configured for %s\n",
2783 ata_mode_string(ata_xfer_mode2mask(dev->xfer_mode)));
2788 * ata_do_set_mode - Program timings and issue SET FEATURES - XFER
2789 * @ap: port on which timings will be programmed
2790 * @r_failed_dev: out paramter for failed device
2792 * Standard implementation of the function used to tune and set
2793 * ATA device disk transfer mode (PIO3, UDMA6, etc.). If
2794 * ata_dev_set_mode() fails, pointer to the failing device is
2795 * returned in @r_failed_dev.
2798 * PCI/etc. bus probe sem.
2801 * 0 on success, negative errno otherwise
2804 int ata_do_set_mode(struct ata_port *ap, struct ata_device **r_failed_dev)
2806 struct ata_device *dev;
2807 int i, rc = 0, used_dma = 0, found = 0;
2810 /* step 1: calculate xfer_mask */
2811 for (i = 0; i < ATA_MAX_DEVICES; i++) {
2812 unsigned int pio_mask, dma_mask;
2814 dev = &ap->device[i];
2816 if (!ata_dev_enabled(dev))
2819 ata_dev_xfermask(dev);
2821 pio_mask = ata_pack_xfermask(dev->pio_mask, 0, 0);
2822 dma_mask = ata_pack_xfermask(0, dev->mwdma_mask, dev->udma_mask);
2823 dev->pio_mode = ata_xfer_mask2mode(pio_mask);
2824 dev->dma_mode = ata_xfer_mask2mode(dma_mask);
2833 /* step 2: always set host PIO timings */
2834 for (i = 0; i < ATA_MAX_DEVICES; i++) {
2835 dev = &ap->device[i];
2836 if (!ata_dev_enabled(dev))
2839 if (!dev->pio_mode) {
2840 ata_dev_printk(dev, KERN_WARNING, "no PIO support\n");
2845 dev->xfer_mode = dev->pio_mode;
2846 dev->xfer_shift = ATA_SHIFT_PIO;
2847 if (ap->ops->set_piomode)
2848 ap->ops->set_piomode(ap, dev);
2851 /* step 3: set host DMA timings */
2852 for (i = 0; i < ATA_MAX_DEVICES; i++) {
2853 dev = &ap->device[i];
2855 if (!ata_dev_enabled(dev) || !dev->dma_mode)
2858 dev->xfer_mode = dev->dma_mode;
2859 dev->xfer_shift = ata_xfer_mode2shift(dev->dma_mode);
2860 if (ap->ops->set_dmamode)
2861 ap->ops->set_dmamode(ap, dev);
2864 /* step 4: update devices' xfer mode */
2865 for (i = 0; i < ATA_MAX_DEVICES; i++) {
2866 dev = &ap->device[i];
2868 /* don't update suspended devices' xfer mode */
2869 if (!ata_dev_enabled(dev))
2872 rc = ata_dev_set_mode(dev);
2877 /* Record simplex status. If we selected DMA then the other
2878 * host channels are not permitted to do so.
2880 if (used_dma && (ap->host->flags & ATA_HOST_SIMPLEX))
2881 ap->host->simplex_claimed = ap;
2883 /* step5: chip specific finalisation */
2884 if (ap->ops->post_set_mode)
2885 ap->ops->post_set_mode(ap);
2888 *r_failed_dev = dev;
2893 * ata_set_mode - Program timings and issue SET FEATURES - XFER
2894 * @ap: port on which timings will be programmed
2895 * @r_failed_dev: out paramter for failed device
2897 * Set ATA device disk transfer mode (PIO3, UDMA6, etc.). If
2898 * ata_set_mode() fails, pointer to the failing device is
2899 * returned in @r_failed_dev.
2902 * PCI/etc. bus probe sem.
2905 * 0 on success, negative errno otherwise
2907 int ata_set_mode(struct ata_port *ap, struct ata_device **r_failed_dev)
2909 /* has private set_mode? */
2910 if (ap->ops->set_mode)
2911 return ap->ops->set_mode(ap, r_failed_dev);
2912 return ata_do_set_mode(ap, r_failed_dev);
2916 * ata_tf_to_host - issue ATA taskfile to host controller
2917 * @ap: port to which command is being issued
2918 * @tf: ATA taskfile register set
2920 * Issues ATA taskfile register set to ATA host controller,
2921 * with proper synchronization with interrupt handler and
2925 * spin_lock_irqsave(host lock)
2928 static inline void ata_tf_to_host(struct ata_port *ap,
2929 const struct ata_taskfile *tf)
2931 ap->ops->tf_load(ap, tf);
2932 ap->ops->exec_command(ap, tf);
2936 * ata_busy_sleep - sleep until BSY clears, or timeout
2937 * @ap: port containing status register to be polled
2938 * @tmout_pat: impatience timeout
2939 * @tmout: overall timeout
2941 * Sleep until ATA Status register bit BSY clears,
2942 * or a timeout occurs.
2945 * Kernel thread context (may sleep).
2948 * 0 on success, -errno otherwise.
2950 int ata_busy_sleep(struct ata_port *ap,
2951 unsigned long tmout_pat, unsigned long tmout)
2953 unsigned long timer_start, timeout;
2956 status = ata_busy_wait(ap, ATA_BUSY, 300);
2957 timer_start = jiffies;
2958 timeout = timer_start + tmout_pat;
2959 while (status != 0xff && (status & ATA_BUSY) &&
2960 time_before(jiffies, timeout)) {
2962 status = ata_busy_wait(ap, ATA_BUSY, 3);
2965 if (status != 0xff && (status & ATA_BUSY))
2966 ata_port_printk(ap, KERN_WARNING,
2967 "port is slow to respond, please be patient "
2968 "(Status 0x%x)\n", status);
2970 timeout = timer_start + tmout;
2971 while (status != 0xff && (status & ATA_BUSY) &&
2972 time_before(jiffies, timeout)) {
2974 status = ata_chk_status(ap);
2980 if (status & ATA_BUSY) {
2981 ata_port_printk(ap, KERN_ERR, "port failed to respond "
2982 "(%lu secs, Status 0x%x)\n",
2983 tmout / HZ, status);
2991 * ata_wait_ready - sleep until BSY clears, or timeout
2992 * @ap: port containing status register to be polled
2993 * @deadline: deadline jiffies for the operation
2995 * Sleep until ATA Status register bit BSY clears, or timeout
2999 * Kernel thread context (may sleep).
3002 * 0 on success, -errno otherwise.
3004 int ata_wait_ready(struct ata_port *ap, unsigned long deadline)
3006 unsigned long start = jiffies;
3010 u8 status = ata_chk_status(ap);
3011 unsigned long now = jiffies;
3013 if (!(status & ATA_BUSY))
3017 if (time_after(now, deadline))
3020 if (!warned && time_after(now, start + 5 * HZ) &&
3021 (deadline - now > 3 * HZ)) {
3022 ata_port_printk(ap, KERN_WARNING,
3023 "port is slow to respond, please be patient "
3024 "(Status 0x%x)\n", status);
3032 static int ata_bus_post_reset(struct ata_port *ap, unsigned int devmask,
3033 unsigned long deadline)
3035 struct ata_ioports *ioaddr = &ap->ioaddr;
3036 unsigned int dev0 = devmask & (1 << 0);
3037 unsigned int dev1 = devmask & (1 << 1);
3040 /* if device 0 was found in ata_devchk, wait for its
3044 rc = ata_wait_ready(ap, deadline);
3052 /* if device 1 was found in ata_devchk, wait for
3053 * register access, then wait for BSY to clear
3058 ap->ops->dev_select(ap, 1);
3059 nsect = ioread8(ioaddr->nsect_addr);
3060 lbal = ioread8(ioaddr->lbal_addr);
3061 if ((nsect == 1) && (lbal == 1))
3063 if (time_after(jiffies, deadline))
3065 msleep(50); /* give drive a breather */
3068 rc = ata_wait_ready(ap, deadline);
3076 /* is all this really necessary? */
3077 ap->ops->dev_select(ap, 0);
3079 ap->ops->dev_select(ap, 1);
3081 ap->ops->dev_select(ap, 0);
3086 static int ata_bus_softreset(struct ata_port *ap, unsigned int devmask,
3087 unsigned long deadline)
3089 struct ata_ioports *ioaddr = &ap->ioaddr;
3091 DPRINTK("ata%u: bus reset via SRST\n", ap->print_id);
3093 /* software reset. causes dev0 to be selected */
3094 iowrite8(ap->ctl, ioaddr->ctl_addr);
3095 udelay(20); /* FIXME: flush */
3096 iowrite8(ap->ctl | ATA_SRST, ioaddr->ctl_addr);
3097 udelay(20); /* FIXME: flush */
3098 iowrite8(ap->ctl, ioaddr->ctl_addr);
3100 /* spec mandates ">= 2ms" before checking status.
3101 * We wait 150ms, because that was the magic delay used for
3102 * ATAPI devices in Hale Landis's ATADRVR, for the period of time
3103 * between when the ATA command register is written, and then
3104 * status is checked. Because waiting for "a while" before
3105 * checking status is fine, post SRST, we perform this magic
3106 * delay here as well.
3108 * Old drivers/ide uses the 2mS rule and then waits for ready
3112 /* Before we perform post reset processing we want to see if
3113 * the bus shows 0xFF because the odd clown forgets the D7
3114 * pulldown resistor.
3116 if (ata_check_status(ap) == 0xFF)
3119 return ata_bus_post_reset(ap, devmask, deadline);
3123 * ata_bus_reset - reset host port and associated ATA channel
3124 * @ap: port to reset
3126 * This is typically the first time we actually start issuing
3127 * commands to the ATA channel. We wait for BSY to clear, then
3128 * issue EXECUTE DEVICE DIAGNOSTIC command, polling for its
3129 * result. Determine what devices, if any, are on the channel
3130 * by looking at the device 0/1 error register. Look at the signature
3131 * stored in each device's taskfile registers, to determine if
3132 * the device is ATA or ATAPI.
3135 * PCI/etc. bus probe sem.
3136 * Obtains host lock.
3139 * Sets ATA_FLAG_DISABLED if bus reset fails.
3142 void ata_bus_reset(struct ata_port *ap)
3144 struct ata_ioports *ioaddr = &ap->ioaddr;
3145 unsigned int slave_possible = ap->flags & ATA_FLAG_SLAVE_POSS;
3147 unsigned int dev0, dev1 = 0, devmask = 0;
3150 DPRINTK("ENTER, host %u, port %u\n", ap->print_id, ap->port_no);
3152 /* determine if device 0/1 are present */
3153 if (ap->flags & ATA_FLAG_SATA_RESET)
3156 dev0 = ata_devchk(ap, 0);
3158 dev1 = ata_devchk(ap, 1);
3162 devmask |= (1 << 0);
3164 devmask |= (1 << 1);
3166 /* select device 0 again */
3167 ap->ops->dev_select(ap, 0);
3169 /* issue bus reset */
3170 if (ap->flags & ATA_FLAG_SRST) {
3171 rc = ata_bus_softreset(ap, devmask, jiffies + 40 * HZ);
3172 if (rc && rc != -ENODEV)
3177 * determine by signature whether we have ATA or ATAPI devices
3179 ap->device[0].class = ata_dev_try_classify(ap, 0, &err);
3180 if ((slave_possible) && (err != 0x81))
3181 ap->device[1].class = ata_dev_try_classify(ap, 1, &err);
3183 /* re-enable interrupts */
3184 ap->ops->irq_on(ap);
3186 /* is double-select really necessary? */
3187 if (ap->device[1].class != ATA_DEV_NONE)
3188 ap->ops->dev_select(ap, 1);
3189 if (ap->device[0].class != ATA_DEV_NONE)
3190 ap->ops->dev_select(ap, 0);
3192 /* if no devices were detected, disable this port */
3193 if ((ap->device[0].class == ATA_DEV_NONE) &&
3194 (ap->device[1].class == ATA_DEV_NONE))
3197 if (ap->flags & (ATA_FLAG_SATA_RESET | ATA_FLAG_SRST)) {
3198 /* set up device control for ATA_FLAG_SATA_RESET */
3199 iowrite8(ap->ctl, ioaddr->ctl_addr);
3206 ata_port_printk(ap, KERN_ERR, "disabling port\n");
3207 ap->ops->port_disable(ap);
3213 * sata_phy_debounce - debounce SATA phy status
3214 * @ap: ATA port to debounce SATA phy status for
3215 * @params: timing parameters { interval, duratinon, timeout } in msec
3216 * @deadline: deadline jiffies for the operation
3218 * Make sure SStatus of @ap reaches stable state, determined by
3219 * holding the same value where DET is not 1 for @duration polled
3220 * every @interval, before @timeout. Timeout constraints the
3221 * beginning of the stable state. Because DET gets stuck at 1 on
3222 * some controllers after hot unplugging, this functions waits
3223 * until timeout then returns 0 if DET is stable at 1.
3225 * @timeout is further limited by @deadline. The sooner of the
3229 * Kernel thread context (may sleep)
3232 * 0 on success, -errno on failure.
3234 int sata_phy_debounce(struct ata_port *ap, const unsigned long *params,
3235 unsigned long deadline)
3237 unsigned long interval_msec = params[0];
3238 unsigned long duration = msecs_to_jiffies(params[1]);
3239 unsigned long last_jiffies, t;
3243 t = jiffies + msecs_to_jiffies(params[2]);
3244 if (time_before(t, deadline))
3247 if ((rc = sata_scr_read(ap, SCR_STATUS, &cur)))
3252 last_jiffies = jiffies;
3255 msleep(interval_msec);
3256 if ((rc = sata_scr_read(ap, SCR_STATUS, &cur)))
3262 if (cur == 1 && time_before(jiffies, deadline))
3264 if (time_after(jiffies, last_jiffies + duration))
3269 /* unstable, start over */
3271 last_jiffies = jiffies;
3273 /* check deadline */
3274 if (time_after(jiffies, deadline))
3280 * sata_phy_resume - resume SATA phy
3281 * @ap: ATA port to resume SATA phy for
3282 * @params: timing parameters { interval, duratinon, timeout } in msec
3283 * @deadline: deadline jiffies for the operation
3285 * Resume SATA phy of @ap and debounce it.
3288 * Kernel thread context (may sleep)
3291 * 0 on success, -errno on failure.
3293 int sata_phy_resume(struct ata_port *ap, const unsigned long *params,
3294 unsigned long deadline)
3299 if ((rc = sata_scr_read(ap, SCR_CONTROL, &scontrol)))
3302 scontrol = (scontrol & 0x0f0) | 0x300;
3304 if ((rc = sata_scr_write(ap, SCR_CONTROL, scontrol)))
3307 /* Some PHYs react badly if SStatus is pounded immediately
3308 * after resuming. Delay 200ms before debouncing.
3312 return sata_phy_debounce(ap, params, deadline);
3316 * ata_std_prereset - prepare for reset
3317 * @ap: ATA port to be reset
3318 * @deadline: deadline jiffies for the operation
3320 * @ap is about to be reset. Initialize it. Failure from
3321 * prereset makes libata abort whole reset sequence and give up
3322 * that port, so prereset should be best-effort. It does its
3323 * best to prepare for reset sequence but if things go wrong, it
3324 * should just whine, not fail.
3327 * Kernel thread context (may sleep)
3330 * 0 on success, -errno otherwise.
3332 int ata_std_prereset(struct ata_port *ap, unsigned long deadline)
3334 struct ata_eh_context *ehc = &ap->eh_context;
3335 const unsigned long *timing = sata_ehc_deb_timing(ehc);
3338 /* handle link resume */
3339 if ((ehc->i.flags & ATA_EHI_RESUME_LINK) &&
3340 (ap->flags & ATA_FLAG_HRST_TO_RESUME))
3341 ehc->i.action |= ATA_EH_HARDRESET;
3343 /* if we're about to do hardreset, nothing more to do */
3344 if (ehc->i.action & ATA_EH_HARDRESET)
3347 /* if SATA, resume phy */
3348 if (ap->cbl == ATA_CBL_SATA) {
3349 rc = sata_phy_resume(ap, timing, deadline);
3350 /* whine about phy resume failure but proceed */
3351 if (rc && rc != -EOPNOTSUPP)
3352 ata_port_printk(ap, KERN_WARNING, "failed to resume "
3353 "link for reset (errno=%d)\n", rc);
3356 /* Wait for !BSY if the controller can wait for the first D2H
3357 * Reg FIS and we don't know that no device is attached.
3359 if (!(ap->flags & ATA_FLAG_SKIP_D2H_BSY) && !ata_port_offline(ap)) {
3360 rc = ata_wait_ready(ap, deadline);
3362 ata_port_printk(ap, KERN_WARNING, "device not ready "
3363 "(errno=%d), forcing hardreset\n", rc);
3364 ehc->i.action |= ATA_EH_HARDRESET;
3372 * ata_std_softreset - reset host port via ATA SRST
3373 * @ap: port to reset
3374 * @classes: resulting classes of attached devices
3375 * @deadline: deadline jiffies for the operation
3377 * Reset host port using ATA SRST.
3380 * Kernel thread context (may sleep)
3383 * 0 on success, -errno otherwise.
3385 int ata_std_softreset(struct ata_port *ap, unsigned int *classes,
3386 unsigned long deadline)
3388 unsigned int slave_possible = ap->flags & ATA_FLAG_SLAVE_POSS;
3389 unsigned int devmask = 0;
3395 if (ata_port_offline(ap)) {
3396 classes[0] = ATA_DEV_NONE;
3400 /* determine if device 0/1 are present */
3401 if (ata_devchk(ap, 0))
3402 devmask |= (1 << 0);
3403 if (slave_possible && ata_devchk(ap, 1))
3404 devmask |= (1 << 1);
3406 /* select device 0 again */
3407 ap->ops->dev_select(ap, 0);
3409 /* issue bus reset */
3410 DPRINTK("about to softreset, devmask=%x\n", devmask);
3411 rc = ata_bus_softreset(ap, devmask, deadline);
3412 /* if link is occupied, -ENODEV too is an error */
3413 if (rc && (rc != -ENODEV || sata_scr_valid(ap))) {
3414 ata_port_printk(ap, KERN_ERR, "SRST failed (errno=%d)\n", rc);
3418 /* determine by signature whether we have ATA or ATAPI devices */
3419 classes[0] = ata_dev_try_classify(ap, 0, &err);
3420 if (slave_possible && err != 0x81)
3421 classes[1] = ata_dev_try_classify(ap, 1, &err);
3424 DPRINTK("EXIT, classes[0]=%u [1]=%u\n", classes[0], classes[1]);
3429 * sata_port_hardreset - reset port via SATA phy reset
3430 * @ap: port to reset
3431 * @timing: timing parameters { interval, duratinon, timeout } in msec
3432 * @deadline: deadline jiffies for the operation
3434 * SATA phy-reset host port using DET bits of SControl register.
3437 * Kernel thread context (may sleep)
3440 * 0 on success, -errno otherwise.
3442 int sata_port_hardreset(struct ata_port *ap, const unsigned long *timing,
3443 unsigned long deadline)
3450 if (sata_set_spd_needed(ap)) {
3451 /* SATA spec says nothing about how to reconfigure
3452 * spd. To be on the safe side, turn off phy during
3453 * reconfiguration. This works for at least ICH7 AHCI
3456 if ((rc = sata_scr_read(ap, SCR_CONTROL, &scontrol)))
3459 scontrol = (scontrol & 0x0f0) | 0x304;
3461 if ((rc = sata_scr_write(ap, SCR_CONTROL, scontrol)))
3467 /* issue phy wake/reset */
3468 if ((rc = sata_scr_read(ap, SCR_CONTROL, &scontrol)))
3471 scontrol = (scontrol & 0x0f0) | 0x301;
3473 if ((rc = sata_scr_write_flush(ap, SCR_CONTROL, scontrol)))
3476 /* Couldn't find anything in SATA I/II specs, but AHCI-1.1
3477 * 10.4.2 says at least 1 ms.
3481 /* bring phy back */
3482 rc = sata_phy_resume(ap, timing, deadline);
3484 DPRINTK("EXIT, rc=%d\n", rc);
3489 * sata_std_hardreset - reset host port via SATA phy reset
3490 * @ap: port to reset
3491 * @class: resulting class of attached device
3492 * @deadline: deadline jiffies for the operation
3494 * SATA phy-reset host port using DET bits of SControl register,
3495 * wait for !BSY and classify the attached device.
3498 * Kernel thread context (may sleep)
3501 * 0 on success, -errno otherwise.
3503 int sata_std_hardreset(struct ata_port *ap, unsigned int *class,
3504 unsigned long deadline)
3506 const unsigned long *timing = sata_ehc_deb_timing(&ap->eh_context);
3512 rc = sata_port_hardreset(ap, timing, deadline);
3514 ata_port_printk(ap, KERN_ERR,
3515 "COMRESET failed (errno=%d)\n", rc);
3519 /* TODO: phy layer with polling, timeouts, etc. */
3520 if (ata_port_offline(ap)) {
3521 *class = ATA_DEV_NONE;
3522 DPRINTK("EXIT, link offline\n");
3526 /* wait a while before checking status, see SRST for more info */
3529 rc = ata_wait_ready(ap, deadline);
3530 /* link occupied, -ENODEV too is an error */
3532 ata_port_printk(ap, KERN_ERR,
3533 "COMRESET failed (errno=%d)\n", rc);
3537 ap->ops->dev_select(ap, 0); /* probably unnecessary */
3539 *class = ata_dev_try_classify(ap, 0, NULL);
3541 DPRINTK("EXIT, class=%u\n", *class);
3546 * ata_std_postreset - standard postreset callback
3547 * @ap: the target ata_port
3548 * @classes: classes of attached devices
3550 * This function is invoked after a successful reset. Note that
3551 * the device might have been reset more than once using
3552 * different reset methods before postreset is invoked.
3555 * Kernel thread context (may sleep)
3557 void ata_std_postreset(struct ata_port *ap, unsigned int *classes)
3563 /* print link status */
3564 sata_print_link_status(ap);
3567 if (sata_scr_read(ap, SCR_ERROR, &serror) == 0)
3568 sata_scr_write(ap, SCR_ERROR, serror);
3570 /* re-enable interrupts */
3571 if (!ap->ops->error_handler)
3572 ap->ops->irq_on(ap);
3574 /* is double-select really necessary? */
3575 if (classes[0] != ATA_DEV_NONE)
3576 ap->ops->dev_select(ap, 1);
3577 if (classes[1] != ATA_DEV_NONE)
3578 ap->ops->dev_select(ap, 0);
3580 /* bail out if no device is present */
3581 if (classes[0] == ATA_DEV_NONE && classes[1] == ATA_DEV_NONE) {
3582 DPRINTK("EXIT, no device\n");
3586 /* set up device control */
3587 if (ap->ioaddr.ctl_addr)
3588 iowrite8(ap->ctl, ap->ioaddr.ctl_addr);
3594 * ata_dev_same_device - Determine whether new ID matches configured device
3595 * @dev: device to compare against
3596 * @new_class: class of the new device
3597 * @new_id: IDENTIFY page of the new device
3599 * Compare @new_class and @new_id against @dev and determine
3600 * whether @dev is the device indicated by @new_class and
3607 * 1 if @dev matches @new_class and @new_id, 0 otherwise.
3609 static int ata_dev_same_device(struct ata_device *dev, unsigned int new_class,
3612 const u16 *old_id = dev->id;
3613 unsigned char model[2][ATA_ID_PROD_LEN + 1];
3614 unsigned char serial[2][ATA_ID_SERNO_LEN + 1];
3617 if (dev->class != new_class) {
3618 ata_dev_printk(dev, KERN_INFO, "class mismatch %d != %d\n",
3619 dev->class, new_class);
3623 ata_id_c_string(old_id, model[0], ATA_ID_PROD, sizeof(model[0]));
3624 ata_id_c_string(new_id, model[1], ATA_ID_PROD, sizeof(model[1]));
3625 ata_id_c_string(old_id, serial[0], ATA_ID_SERNO, sizeof(serial[0]));
3626 ata_id_c_string(new_id, serial[1], ATA_ID_SERNO, sizeof(serial[1]));
3627 new_n_sectors = ata_id_n_sectors(new_id);
3629 if (strcmp(model[0], model[1])) {
3630 ata_dev_printk(dev, KERN_INFO, "model number mismatch "
3631 "'%s' != '%s'\n", model[0], model[1]);
3635 if (strcmp(serial[0], serial[1])) {
3636 ata_dev_printk(dev, KERN_INFO, "serial number mismatch "
3637 "'%s' != '%s'\n", serial[0], serial[1]);
3641 if (dev->class == ATA_DEV_ATA && dev->n_sectors != new_n_sectors) {
3642 ata_dev_printk(dev, KERN_INFO, "n_sectors mismatch "
3644 (unsigned long long)dev->n_sectors,
3645 (unsigned long long)new_n_sectors);
3646 /* Are we the boot time size - if so we appear to be the
3647 same disk at this point and our HPA got reapplied */
3648 if (ata_ignore_hpa && dev->n_sectors_boot == new_n_sectors
3649 && ata_id_hpa_enabled(new_id))
3658 * ata_dev_revalidate - Revalidate ATA device
3659 * @dev: device to revalidate
3660 * @readid_flags: read ID flags
3662 * Re-read IDENTIFY page and make sure @dev is still attached to
3666 * Kernel thread context (may sleep)
3669 * 0 on success, negative errno otherwise
3671 int ata_dev_revalidate(struct ata_device *dev, unsigned int readid_flags)
3673 unsigned int class = dev->class;
3674 u16 *id = (void *)dev->ap->sector_buf;
3677 if (!ata_dev_enabled(dev)) {
3683 rc = ata_dev_read_id(dev, &class, readid_flags, id);
3687 /* is the device still there? */
3688 if (!ata_dev_same_device(dev, class, id)) {
3693 memcpy(dev->id, id, sizeof(id[0]) * ATA_ID_WORDS);
3695 /* configure device according to the new ID */
3696 rc = ata_dev_configure(dev);
3701 ata_dev_printk(dev, KERN_ERR, "revalidation failed (errno=%d)\n", rc);
3705 struct ata_blacklist_entry {
3706 const char *model_num;
3707 const char *model_rev;
3708 unsigned long horkage;
3711 static const struct ata_blacklist_entry ata_device_blacklist [] = {
3712 /* Devices with DMA related problems under Linux */
3713 { "WDC AC11000H", NULL, ATA_HORKAGE_NODMA },
3714 { "WDC AC22100H", NULL, ATA_HORKAGE_NODMA },
3715 { "WDC AC32500H", NULL, ATA_HORKAGE_NODMA },
3716 { "WDC AC33100H", NULL, ATA_HORKAGE_NODMA },
3717 { "WDC AC31600H", NULL, ATA_HORKAGE_NODMA },
3718 { "WDC AC32100H", "24.09P07", ATA_HORKAGE_NODMA },
3719 { "WDC AC23200L", "21.10N21", ATA_HORKAGE_NODMA },
3720 { "Compaq CRD-8241B", NULL, ATA_HORKAGE_NODMA },
3721 { "CRD-8400B", NULL, ATA_HORKAGE_NODMA },
3722 { "CRD-8480B", NULL, ATA_HORKAGE_NODMA },
3723 { "CRD-8482B", NULL, ATA_HORKAGE_NODMA },
3724 { "CRD-84", NULL, ATA_HORKAGE_NODMA },
3725 { "SanDisk SDP3B", NULL, ATA_HORKAGE_NODMA },
3726 { "SanDisk SDP3B-64", NULL, ATA_HORKAGE_NODMA },
3727 { "SANYO CD-ROM CRD", NULL, ATA_HORKAGE_NODMA },
3728 { "HITACHI CDR-8", NULL, ATA_HORKAGE_NODMA },
3729 { "HITACHI CDR-8335", NULL, ATA_HORKAGE_NODMA },
3730 { "HITACHI CDR-8435", NULL, ATA_HORKAGE_NODMA },
3731 { "Toshiba CD-ROM XM-6202B", NULL, ATA_HORKAGE_NODMA },
3732 { "TOSHIBA CD-ROM XM-1702BC", NULL, ATA_HORKAGE_NODMA },
3733 { "CD-532E-A", NULL, ATA_HORKAGE_NODMA },
3734 { "E-IDE CD-ROM CR-840",NULL, ATA_HORKAGE_NODMA },
3735 { "CD-ROM Drive/F5A", NULL, ATA_HORKAGE_NODMA },
3736 { "WPI CDD-820", NULL, ATA_HORKAGE_NODMA },
3737 { "SAMSUNG CD-ROM SC-148C", NULL, ATA_HORKAGE_NODMA },
3738 { "SAMSUNG CD-ROM SC", NULL, ATA_HORKAGE_NODMA },
3739 { "ATAPI CD-ROM DRIVE 40X MAXIMUM",NULL,ATA_HORKAGE_NODMA },
3740 { "_NEC DV5800A", NULL, ATA_HORKAGE_NODMA },
3741 { "SAMSUNG CD-ROM SN-124","N001", ATA_HORKAGE_NODMA },
3743 /* Weird ATAPI devices */
3744 { "TORiSAN DVD-ROM DRD-N216", NULL, ATA_HORKAGE_MAX_SEC_128 |
3745 ATA_HORKAGE_DMA_RW_ONLY },
3747 /* Devices we expect to fail diagnostics */
3749 /* Devices where NCQ should be avoided */
3751 { "WDC WD740ADFD-00", NULL, ATA_HORKAGE_NONCQ },
3752 /* http://thread.gmane.org/gmane.linux.ide/14907 */
3753 { "FUJITSU MHT2060BH", NULL, ATA_HORKAGE_NONCQ },
3755 { "Maxtor 6L250S0", "BANC1G10", ATA_HORKAGE_NONCQ },
3756 /* NCQ hard hangs device under heavier load, needs hard power cycle */
3757 { "Maxtor 6B250S0", "BANC1B70", ATA_HORKAGE_NONCQ },
3758 /* Blacklist entries taken from Silicon Image 3124/3132
3759 Windows driver .inf file - also several Linux problem reports */
3760 { "HTS541060G9SA00", "MB3OC60D", ATA_HORKAGE_NONCQ, },
3761 { "HTS541080G9SA00", "MB4OC60D", ATA_HORKAGE_NONCQ, },
3762 { "HTS541010G9SA00", "MBZOC60D", ATA_HORKAGE_NONCQ, },
3764 /* Devices with NCQ limits */
3770 unsigned long ata_device_blacklisted(const struct ata_device *dev)
3772 unsigned char model_num[ATA_ID_PROD_LEN + 1];
3773 unsigned char model_rev[ATA_ID_FW_REV_LEN + 1];
3774 const struct ata_blacklist_entry *ad = ata_device_blacklist;
3776 ata_id_c_string(dev->id, model_num, ATA_ID_PROD, sizeof(model_num));
3777 ata_id_c_string(dev->id, model_rev, ATA_ID_FW_REV, sizeof(model_rev));
3779 while (ad->model_num) {
3780 if (!strcmp(ad->model_num, model_num)) {
3781 if (ad->model_rev == NULL)
3783 if (!strcmp(ad->model_rev, model_rev))
3791 static int ata_dma_blacklisted(const struct ata_device *dev)
3793 /* We don't support polling DMA.
3794 * DMA blacklist those ATAPI devices with CDB-intr (and use PIO)
3795 * if the LLDD handles only interrupts in the HSM_ST_LAST state.
3797 if ((dev->ap->flags & ATA_FLAG_PIO_POLLING) &&
3798 (dev->flags & ATA_DFLAG_CDB_INTR))
3800 return (ata_device_blacklisted(dev) & ATA_HORKAGE_NODMA) ? 1 : 0;
3804 * ata_dev_xfermask - Compute supported xfermask of the given device
3805 * @dev: Device to compute xfermask for
3807 * Compute supported xfermask of @dev and store it in
3808 * dev->*_mask. This function is responsible for applying all
3809 * known limits including host controller limits, device
3815 static void ata_dev_xfermask(struct ata_device *dev)
3817 struct ata_port *ap = dev->ap;
3818 struct ata_host *host = ap->host;
3819 unsigned long xfer_mask;
3821 /* controller modes available */
3822 xfer_mask = ata_pack_xfermask(ap->pio_mask,
3823 ap->mwdma_mask, ap->udma_mask);
3825 /* drive modes available */
3826 xfer_mask &= ata_pack_xfermask(dev->pio_mask,
3827 dev->mwdma_mask, dev->udma_mask);
3828 xfer_mask &= ata_id_xfermask(dev->id);
3831 * CFA Advanced TrueIDE timings are not allowed on a shared
3834 if (ata_dev_pair(dev)) {
3835 /* No PIO5 or PIO6 */
3836 xfer_mask &= ~(0x03 << (ATA_SHIFT_PIO + 5));
3837 /* No MWDMA3 or MWDMA 4 */
3838 xfer_mask &= ~(0x03 << (ATA_SHIFT_MWDMA + 3));
3841 if (ata_dma_blacklisted(dev)) {
3842 xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA);
3843 ata_dev_printk(dev, KERN_WARNING,
3844 "device is on DMA blacklist, disabling DMA\n");
3847 if ((host->flags & ATA_HOST_SIMPLEX) &&
3848 host->simplex_claimed && host->simplex_claimed != ap) {
3849 xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA);
3850 ata_dev_printk(dev, KERN_WARNING, "simplex DMA is claimed by "
3851 "other device, disabling DMA\n");
3854 if (ap->flags & ATA_FLAG_NO_IORDY)
3855 xfer_mask &= ata_pio_mask_no_iordy(dev);
3857 if (ap->ops->mode_filter)
3858 xfer_mask = ap->ops->mode_filter(dev, xfer_mask);
3860 /* Apply cable rule here. Don't apply it early because when
3861 * we handle hot plug the cable type can itself change.
3862 * Check this last so that we know if the transfer rate was
3863 * solely limited by the cable.
3864 * Unknown or 80 wire cables reported host side are checked
3865 * drive side as well. Cases where we know a 40wire cable
3866 * is used safely for 80 are not checked here.
3868 if (xfer_mask & (0xF8 << ATA_SHIFT_UDMA))
3869 /* UDMA/44 or higher would be available */
3870 if((ap->cbl == ATA_CBL_PATA40) ||
3871 (ata_drive_40wire(dev->id) &&
3872 (ap->cbl == ATA_CBL_PATA_UNK ||
3873 ap->cbl == ATA_CBL_PATA80))) {
3874 ata_dev_printk(dev, KERN_WARNING,
3875 "limited to UDMA/33 due to 40-wire cable\n");
3876 xfer_mask &= ~(0xF8 << ATA_SHIFT_UDMA);
3879 ata_unpack_xfermask(xfer_mask, &dev->pio_mask,
3880 &dev->mwdma_mask, &dev->udma_mask);
3884 * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command
3885 * @dev: Device to which command will be sent
3887 * Issue SET FEATURES - XFER MODE command to device @dev
3891 * PCI/etc. bus probe sem.
3894 * 0 on success, AC_ERR_* mask otherwise.
3897 static unsigned int ata_dev_set_xfermode(struct ata_device *dev)
3899 struct ata_taskfile tf;
3900 unsigned int err_mask;
3902 /* set up set-features taskfile */
3903 DPRINTK("set features - xfer mode\n");
3905 ata_tf_init(dev, &tf);
3906 tf.command = ATA_CMD_SET_FEATURES;
3907 tf.feature = SETFEATURES_XFER;
3908 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
3909 tf.protocol = ATA_PROT_NODATA;
3910 tf.nsect = dev->xfer_mode;
3912 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0);
3914 DPRINTK("EXIT, err_mask=%x\n", err_mask);
3919 * ata_dev_init_params - Issue INIT DEV PARAMS command
3920 * @dev: Device to which command will be sent
3921 * @heads: Number of heads (taskfile parameter)
3922 * @sectors: Number of sectors (taskfile parameter)
3925 * Kernel thread context (may sleep)
3928 * 0 on success, AC_ERR_* mask otherwise.
3930 static unsigned int ata_dev_init_params(struct ata_device *dev,
3931 u16 heads, u16 sectors)
3933 struct ata_taskfile tf;
3934 unsigned int err_mask;
3936 /* Number of sectors per track 1-255. Number of heads 1-16 */
3937 if (sectors < 1 || sectors > 255 || heads < 1 || heads > 16)
3938 return AC_ERR_INVALID;
3940 /* set up init dev params taskfile */
3941 DPRINTK("init dev params \n");
3943 ata_tf_init(dev, &tf);
3944 tf.command = ATA_CMD_INIT_DEV_PARAMS;
3945 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
3946 tf.protocol = ATA_PROT_NODATA;
3948 tf.device |= (heads - 1) & 0x0f; /* max head = num. of heads - 1 */
3950 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0);
3952 DPRINTK("EXIT, err_mask=%x\n", err_mask);
3957 * ata_sg_clean - Unmap DMA memory associated with command
3958 * @qc: Command containing DMA memory to be released
3960 * Unmap all mapped DMA memory associated with this command.
3963 * spin_lock_irqsave(host lock)
3965 void ata_sg_clean(struct ata_queued_cmd *qc)
3967 struct ata_port *ap = qc->ap;
3968 struct scatterlist *sg = qc->__sg;
3969 int dir = qc->dma_dir;
3970 void *pad_buf = NULL;
3972 WARN_ON(!(qc->flags & ATA_QCFLAG_DMAMAP));
3973 WARN_ON(sg == NULL);
3975 if (qc->flags & ATA_QCFLAG_SINGLE)
3976 WARN_ON(qc->n_elem > 1);
3978 VPRINTK("unmapping %u sg elements\n", qc->n_elem);
3980 /* if we padded the buffer out to 32-bit bound, and data
3981 * xfer direction is from-device, we must copy from the
3982 * pad buffer back into the supplied buffer
3984 if (qc->pad_len && !(qc->tf.flags & ATA_TFLAG_WRITE))
3985 pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ);
3987 if (qc->flags & ATA_QCFLAG_SG) {
3989 dma_unmap_sg(ap->dev, sg, qc->n_elem, dir);
3990 /* restore last sg */
3991 sg[qc->orig_n_elem - 1].length += qc->pad_len;
3993 struct scatterlist *psg = &qc->pad_sgent;
3994 void *addr = kmap_atomic(psg->page, KM_IRQ0);
3995 memcpy(addr + psg->offset, pad_buf, qc->pad_len);
3996 kunmap_atomic(addr, KM_IRQ0);
4000 dma_unmap_single(ap->dev,
4001 sg_dma_address(&sg[0]), sg_dma_len(&sg[0]),
4004 sg->length += qc->pad_len;
4006 memcpy(qc->buf_virt + sg->length - qc->pad_len,
4007 pad_buf, qc->pad_len);
4010 qc->flags &= ~ATA_QCFLAG_DMAMAP;
4015 * ata_fill_sg - Fill PCI IDE PRD table
4016 * @qc: Metadata associated with taskfile to be transferred
4018 * Fill PCI IDE PRD (scatter-gather) table with segments
4019 * associated with the current disk command.
4022 * spin_lock_irqsave(host lock)
4025 static void ata_fill_sg(struct ata_queued_cmd *qc)
4027 struct ata_port *ap = qc->ap;
4028 struct scatterlist *sg;
4031 WARN_ON(qc->__sg == NULL);
4032 WARN_ON(qc->n_elem == 0 && qc->pad_len == 0);
4035 ata_for_each_sg(sg, qc) {
4039 /* determine if physical DMA addr spans 64K boundary.
4040 * Note h/w doesn't support 64-bit, so we unconditionally
4041 * truncate dma_addr_t to u32.
4043 addr = (u32) sg_dma_address(sg);
4044 sg_len = sg_dma_len(sg);
4047 offset = addr & 0xffff;
4049 if ((offset + sg_len) > 0x10000)
4050 len = 0x10000 - offset;
4052 ap->prd[idx].addr = cpu_to_le32(addr);
4053 ap->prd[idx].flags_len = cpu_to_le32(len & 0xffff);
4054 VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", idx, addr, len);
4063 ap->prd[idx - 1].flags_len |= cpu_to_le32(ATA_PRD_EOT);
4066 * ata_check_atapi_dma - Check whether ATAPI DMA can be supported
4067 * @qc: Metadata associated with taskfile to check
4069 * Allow low-level driver to filter ATA PACKET commands, returning
4070 * a status indicating whether or not it is OK to use DMA for the
4071 * supplied PACKET command.
4074 * spin_lock_irqsave(host lock)
4076 * RETURNS: 0 when ATAPI DMA can be used
4079 int ata_check_atapi_dma(struct ata_queued_cmd *qc)
4081 struct ata_port *ap = qc->ap;
4082 int rc = 0; /* Assume ATAPI DMA is OK by default */
4084 /* some drives can only do ATAPI DMA on read/write */
4085 if (unlikely(qc->dev->horkage & ATA_HORKAGE_DMA_RW_ONLY)) {
4086 struct scsi_cmnd *cmd = qc->scsicmd;
4087 u8 *scsicmd = cmd->cmnd;
4089 switch (scsicmd[0]) {
4096 /* atapi dma maybe ok */
4099 /* turn off atapi dma */
4104 if (ap->ops->check_atapi_dma)
4105 rc = ap->ops->check_atapi_dma(qc);
4110 * ata_qc_prep - Prepare taskfile for submission
4111 * @qc: Metadata associated with taskfile to be prepared
4113 * Prepare ATA taskfile for submission.
4116 * spin_lock_irqsave(host lock)
4118 void ata_qc_prep(struct ata_queued_cmd *qc)
4120 if (!(qc->flags & ATA_QCFLAG_DMAMAP))
4126 void ata_noop_qc_prep(struct ata_queued_cmd *qc) { }
4129 * ata_sg_init_one - Associate command with memory buffer
4130 * @qc: Command to be associated
4131 * @buf: Memory buffer
4132 * @buflen: Length of memory buffer, in bytes.
4134 * Initialize the data-related elements of queued_cmd @qc
4135 * to point to a single memory buffer, @buf of byte length @buflen.
4138 * spin_lock_irqsave(host lock)
4141 void ata_sg_init_one(struct ata_queued_cmd *qc, void *buf, unsigned int buflen)
4143 qc->flags |= ATA_QCFLAG_SINGLE;
4145 qc->__sg = &qc->sgent;
4147 qc->orig_n_elem = 1;
4149 qc->nbytes = buflen;
4151 sg_init_one(&qc->sgent, buf, buflen);
4155 * ata_sg_init - Associate command with scatter-gather table.
4156 * @qc: Command to be associated
4157 * @sg: Scatter-gather table.
4158 * @n_elem: Number of elements in s/g table.
4160 * Initialize the data-related elements of queued_cmd @qc
4161 * to point to a scatter-gather table @sg, containing @n_elem
4165 * spin_lock_irqsave(host lock)
4168 void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
4169 unsigned int n_elem)
4171 qc->flags |= ATA_QCFLAG_SG;
4173 qc->n_elem = n_elem;
4174 qc->orig_n_elem = n_elem;
4178 * ata_sg_setup_one - DMA-map the memory buffer associated with a command.
4179 * @qc: Command with memory buffer to be mapped.
4181 * DMA-map the memory buffer associated with queued_cmd @qc.
4184 * spin_lock_irqsave(host lock)
4187 * Zero on success, negative on error.
4190 static int ata_sg_setup_one(struct ata_queued_cmd *qc)
4192 struct ata_port *ap = qc->ap;
4193 int dir = qc->dma_dir;
4194 struct scatterlist *sg = qc->__sg;
4195 dma_addr_t dma_address;
4198 /* we must lengthen transfers to end on a 32-bit boundary */
4199 qc->pad_len = sg->length & 3;
4201 void *pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ);
4202 struct scatterlist *psg = &qc->pad_sgent;
4204 WARN_ON(qc->dev->class != ATA_DEV_ATAPI);
4206 memset(pad_buf, 0, ATA_DMA_PAD_SZ);
4208 if (qc->tf.flags & ATA_TFLAG_WRITE)
4209 memcpy(pad_buf, qc->buf_virt + sg->length - qc->pad_len,
4212 sg_dma_address(psg) = ap->pad_dma + (qc->tag * ATA_DMA_PAD_SZ);
4213 sg_dma_len(psg) = ATA_DMA_PAD_SZ;
4215 sg->length -= qc->pad_len;
4216 if (sg->length == 0)
4219 DPRINTK("padding done, sg->length=%u pad_len=%u\n",
4220 sg->length, qc->pad_len);
4228 dma_address = dma_map_single(ap->dev, qc->buf_virt,
4230 if (dma_mapping_error(dma_address)) {
4232 sg->length += qc->pad_len;
4236 sg_dma_address(sg) = dma_address;
4237 sg_dma_len(sg) = sg->length;
4240 DPRINTK("mapped buffer of %d bytes for %s\n", sg_dma_len(sg),
4241 qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read");
4247 * ata_sg_setup - DMA-map the scatter-gather table associated with a command.
4248 * @qc: Command with scatter-gather table to be mapped.
4250 * DMA-map the scatter-gather table associated with queued_cmd @qc.
4253 * spin_lock_irqsave(host lock)
4256 * Zero on success, negative on error.
4260 static int ata_sg_setup(struct ata_queued_cmd *qc)
4262 struct ata_port *ap = qc->ap;
4263 struct scatterlist *sg = qc->__sg;
4264 struct scatterlist *lsg = &sg[qc->n_elem - 1];
4265 int n_elem, pre_n_elem, dir, trim_sg = 0;
4267 VPRINTK("ENTER, ata%u\n", ap->print_id);
4268 WARN_ON(!(qc->flags & ATA_QCFLAG_SG));
4270 /* we must lengthen transfers to end on a 32-bit boundary */
4271 qc->pad_len = lsg->length & 3;
4273 void *pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ);
4274 struct scatterlist *psg = &qc->pad_sgent;
4275 unsigned int offset;
4277 WARN_ON(qc->dev->class != ATA_DEV_ATAPI);
4279 memset(pad_buf, 0, ATA_DMA_PAD_SZ);
4282 * psg->page/offset are used to copy to-be-written
4283 * data in this function or read data in ata_sg_clean.
4285 offset = lsg->offset + lsg->length - qc->pad_len;
4286 psg->page = nth_page(lsg->page, offset >> PAGE_SHIFT);
4287 psg->offset = offset_in_page(offset);
4289 if (qc->tf.flags & ATA_TFLAG_WRITE) {
4290 void *addr = kmap_atomic(psg->page, KM_IRQ0);
4291 memcpy(pad_buf, addr + psg->offset, qc->pad_len);
4292 kunmap_atomic(addr, KM_IRQ0);
4295 sg_dma_address(psg) = ap->pad_dma + (qc->tag * ATA_DMA_PAD_SZ);
4296 sg_dma_len(psg) = ATA_DMA_PAD_SZ;
4298 lsg->length -= qc->pad_len;
4299 if (lsg->length == 0)
4302 DPRINTK("padding done, sg[%d].length=%u pad_len=%u\n",
4303 qc->n_elem - 1, lsg->length, qc->pad_len);
4306 pre_n_elem = qc->n_elem;
4307 if (trim_sg && pre_n_elem)
4316 n_elem = dma_map_sg(ap->dev, sg, pre_n_elem, dir);
4318 /* restore last sg */
4319 lsg->length += qc->pad_len;
4323 DPRINTK("%d sg elements mapped\n", n_elem);
4326 qc->n_elem = n_elem;
4332 * swap_buf_le16 - swap halves of 16-bit words in place
4333 * @buf: Buffer to swap
4334 * @buf_words: Number of 16-bit words in buffer.
4336 * Swap halves of 16-bit words if needed to convert from
4337 * little-endian byte order to native cpu byte order, or
4341 * Inherited from caller.
4343 void swap_buf_le16(u16 *buf, unsigned int buf_words)
4348 for (i = 0; i < buf_words; i++)
4349 buf[i] = le16_to_cpu(buf[i]);
4350 #endif /* __BIG_ENDIAN */
4354 * ata_data_xfer - Transfer data by PIO
4355 * @adev: device to target
4357 * @buflen: buffer length
4358 * @write_data: read/write
4360 * Transfer data from/to the device data register by PIO.
4363 * Inherited from caller.
4365 void ata_data_xfer(struct ata_device *adev, unsigned char *buf,
4366 unsigned int buflen, int write_data)
4368 struct ata_port *ap = adev->ap;
4369 unsigned int words = buflen >> 1;
4371 /* Transfer multiple of 2 bytes */
4373 iowrite16_rep(ap->ioaddr.data_addr, buf, words);
4375 ioread16_rep(ap->ioaddr.data_addr, buf, words);
4377 /* Transfer trailing 1 byte, if any. */
4378 if (unlikely(buflen & 0x01)) {
4379 u16 align_buf[1] = { 0 };
4380 unsigned char *trailing_buf = buf + buflen - 1;
4383 memcpy(align_buf, trailing_buf, 1);
4384 iowrite16(le16_to_cpu(align_buf[0]), ap->ioaddr.data_addr);
4386 align_buf[0] = cpu_to_le16(ioread16(ap->ioaddr.data_addr));
4387 memcpy(trailing_buf, align_buf, 1);
4393 * ata_data_xfer_noirq - Transfer data by PIO
4394 * @adev: device to target
4396 * @buflen: buffer length
4397 * @write_data: read/write
4399 * Transfer data from/to the device data register by PIO. Do the
4400 * transfer with interrupts disabled.
4403 * Inherited from caller.
4405 void ata_data_xfer_noirq(struct ata_device *adev, unsigned char *buf,
4406 unsigned int buflen, int write_data)
4408 unsigned long flags;
4409 local_irq_save(flags);
4410 ata_data_xfer(adev, buf, buflen, write_data);
4411 local_irq_restore(flags);
4416 * ata_pio_sector - Transfer a sector of data.
4417 * @qc: Command on going
4419 * Transfer qc->sect_size bytes of data from/to the ATA device.
4422 * Inherited from caller.
4425 static void ata_pio_sector(struct ata_queued_cmd *qc)
4427 int do_write = (qc->tf.flags & ATA_TFLAG_WRITE);
4428 struct scatterlist *sg = qc->__sg;
4429 struct ata_port *ap = qc->ap;
4431 unsigned int offset;
4434 if (qc->curbytes == qc->nbytes - qc->sect_size)
4435 ap->hsm_task_state = HSM_ST_LAST;
4437 page = sg[qc->cursg].page;
4438 offset = sg[qc->cursg].offset + qc->cursg_ofs;
4440 /* get the current page and offset */
4441 page = nth_page(page, (offset >> PAGE_SHIFT));
4442 offset %= PAGE_SIZE;
4444 DPRINTK("data %s\n", qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read");
4446 if (PageHighMem(page)) {
4447 unsigned long flags;
4449 /* FIXME: use a bounce buffer */
4450 local_irq_save(flags);
4451 buf = kmap_atomic(page, KM_IRQ0);
4453 /* do the actual data transfer */
4454 ap->ops->data_xfer(qc->dev, buf + offset, qc->sect_size, do_write);
4456 kunmap_atomic(buf, KM_IRQ0);
4457 local_irq_restore(flags);
4459 buf = page_address(page);
4460 ap->ops->data_xfer(qc->dev, buf + offset, qc->sect_size, do_write);
4463 qc->curbytes += qc->sect_size;
4464 qc->cursg_ofs += qc->sect_size;
4466 if (qc->cursg_ofs == (&sg[qc->cursg])->length) {
4473 * ata_pio_sectors - Transfer one or many sectors.
4474 * @qc: Command on going
4476 * Transfer one or many sectors of data from/to the
4477 * ATA device for the DRQ request.
4480 * Inherited from caller.
4483 static void ata_pio_sectors(struct ata_queued_cmd *qc)
4485 if (is_multi_taskfile(&qc->tf)) {
4486 /* READ/WRITE MULTIPLE */
4489 WARN_ON(qc->dev->multi_count == 0);
4491 nsect = min((qc->nbytes - qc->curbytes) / qc->sect_size,
4492 qc->dev->multi_count);
4500 * atapi_send_cdb - Write CDB bytes to hardware
4501 * @ap: Port to which ATAPI device is attached.
4502 * @qc: Taskfile currently active
4504 * When device has indicated its readiness to accept
4505 * a CDB, this function is called. Send the CDB.
4511 static void atapi_send_cdb(struct ata_port *ap, struct ata_queued_cmd *qc)
4514 DPRINTK("send cdb\n");
4515 WARN_ON(qc->dev->cdb_len < 12);
4517 ap->ops->data_xfer(qc->dev, qc->cdb, qc->dev->cdb_len, 1);
4518 ata_altstatus(ap); /* flush */
4520 switch (qc->tf.protocol) {
4521 case ATA_PROT_ATAPI:
4522 ap->hsm_task_state = HSM_ST;
4524 case ATA_PROT_ATAPI_NODATA:
4525 ap->hsm_task_state = HSM_ST_LAST;
4527 case ATA_PROT_ATAPI_DMA:
4528 ap->hsm_task_state = HSM_ST_LAST;
4529 /* initiate bmdma */
4530 ap->ops->bmdma_start(qc);
4536 * __atapi_pio_bytes - Transfer data from/to the ATAPI device.
4537 * @qc: Command on going
4538 * @bytes: number of bytes
4540 * Transfer Transfer data from/to the ATAPI device.
4543 * Inherited from caller.
4547 static void __atapi_pio_bytes(struct ata_queued_cmd *qc, unsigned int bytes)
4549 int do_write = (qc->tf.flags & ATA_TFLAG_WRITE);
4550 struct scatterlist *sg = qc->__sg;
4551 struct ata_port *ap = qc->ap;
4554 unsigned int offset, count;
4556 if (qc->curbytes + bytes >= qc->nbytes)
4557 ap->hsm_task_state = HSM_ST_LAST;
4560 if (unlikely(qc->cursg >= qc->n_elem)) {
4562 * The end of qc->sg is reached and the device expects
4563 * more data to transfer. In order not to overrun qc->sg
4564 * and fulfill length specified in the byte count register,
4565 * - for read case, discard trailing data from the device
4566 * - for write case, padding zero data to the device
4568 u16 pad_buf[1] = { 0 };
4569 unsigned int words = bytes >> 1;
4572 if (words) /* warning if bytes > 1 */
4573 ata_dev_printk(qc->dev, KERN_WARNING,
4574 "%u bytes trailing data\n", bytes);
4576 for (i = 0; i < words; i++)
4577 ap->ops->data_xfer(qc->dev, (unsigned char*)pad_buf, 2, do_write);
4579 ap->hsm_task_state = HSM_ST_LAST;
4583 sg = &qc->__sg[qc->cursg];
4586 offset = sg->offset + qc->cursg_ofs;
4588 /* get the current page and offset */
4589 page = nth_page(page, (offset >> PAGE_SHIFT));
4590 offset %= PAGE_SIZE;
4592 /* don't overrun current sg */
4593 count = min(sg->length - qc->cursg_ofs, bytes);
4595 /* don't cross page boundaries */
4596 count = min(count, (unsigned int)PAGE_SIZE - offset);
4598 DPRINTK("data %s\n", qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read");
4600 if (PageHighMem(page)) {
4601 unsigned long flags;
4603 /* FIXME: use bounce buffer */
4604 local_irq_save(flags);
4605 buf = kmap_atomic(page, KM_IRQ0);
4607 /* do the actual data transfer */
4608 ap->ops->data_xfer(qc->dev, buf + offset, count, do_write);
4610 kunmap_atomic(buf, KM_IRQ0);
4611 local_irq_restore(flags);
4613 buf = page_address(page);
4614 ap->ops->data_xfer(qc->dev, buf + offset, count, do_write);
4618 qc->curbytes += count;
4619 qc->cursg_ofs += count;
4621 if (qc->cursg_ofs == sg->length) {
4631 * atapi_pio_bytes - Transfer data from/to the ATAPI device.
4632 * @qc: Command on going
4634 * Transfer Transfer data from/to the ATAPI device.
4637 * Inherited from caller.
4640 static void atapi_pio_bytes(struct ata_queued_cmd *qc)
4642 struct ata_port *ap = qc->ap;
4643 struct ata_device *dev = qc->dev;
4644 unsigned int ireason, bc_lo, bc_hi, bytes;
4645 int i_write, do_write = (qc->tf.flags & ATA_TFLAG_WRITE) ? 1 : 0;
4647 /* Abuse qc->result_tf for temp storage of intermediate TF
4648 * here to save some kernel stack usage.
4649 * For normal completion, qc->result_tf is not relevant. For
4650 * error, qc->result_tf is later overwritten by ata_qc_complete().
4651 * So, the correctness of qc->result_tf is not affected.
4653 ap->ops->tf_read(ap, &qc->result_tf);
4654 ireason = qc->result_tf.nsect;
4655 bc_lo = qc->result_tf.lbam;
4656 bc_hi = qc->result_tf.lbah;
4657 bytes = (bc_hi << 8) | bc_lo;
4659 /* shall be cleared to zero, indicating xfer of data */
4660 if (ireason & (1 << 0))
4663 /* make sure transfer direction matches expected */
4664 i_write = ((ireason & (1 << 1)) == 0) ? 1 : 0;
4665 if (do_write != i_write)
4668 VPRINTK("ata%u: xfering %d bytes\n", ap->print_id, bytes);
4670 __atapi_pio_bytes(qc, bytes);
4675 ata_dev_printk(dev, KERN_INFO, "ATAPI check failed\n");
4676 qc->err_mask |= AC_ERR_HSM;
4677 ap->hsm_task_state = HSM_ST_ERR;
4681 * ata_hsm_ok_in_wq - Check if the qc can be handled in the workqueue.
4682 * @ap: the target ata_port
4686 * 1 if ok in workqueue, 0 otherwise.
4689 static inline int ata_hsm_ok_in_wq(struct ata_port *ap, struct ata_queued_cmd *qc)
4691 if (qc->tf.flags & ATA_TFLAG_POLLING)
4694 if (ap->hsm_task_state == HSM_ST_FIRST) {
4695 if (qc->tf.protocol == ATA_PROT_PIO &&
4696 (qc->tf.flags & ATA_TFLAG_WRITE))
4699 if (is_atapi_taskfile(&qc->tf) &&
4700 !(qc->dev->flags & ATA_DFLAG_CDB_INTR))
4708 * ata_hsm_qc_complete - finish a qc running on standard HSM
4709 * @qc: Command to complete
4710 * @in_wq: 1 if called from workqueue, 0 otherwise
4712 * Finish @qc which is running on standard HSM.
4715 * If @in_wq is zero, spin_lock_irqsave(host lock).
4716 * Otherwise, none on entry and grabs host lock.
4718 static void ata_hsm_qc_complete(struct ata_queued_cmd *qc, int in_wq)
4720 struct ata_port *ap = qc->ap;
4721 unsigned long flags;
4723 if (ap->ops->error_handler) {
4725 spin_lock_irqsave(ap->lock, flags);
4727 /* EH might have kicked in while host lock is
4730 qc = ata_qc_from_tag(ap, qc->tag);
4732 if (likely(!(qc->err_mask & AC_ERR_HSM))) {
4733 ap->ops->irq_on(ap);
4734 ata_qc_complete(qc);
4736 ata_port_freeze(ap);
4739 spin_unlock_irqrestore(ap->lock, flags);
4741 if (likely(!(qc->err_mask & AC_ERR_HSM)))
4742 ata_qc_complete(qc);
4744 ata_port_freeze(ap);
4748 spin_lock_irqsave(ap->lock, flags);
4749 ap->ops->irq_on(ap);
4750 ata_qc_complete(qc);
4751 spin_unlock_irqrestore(ap->lock, flags);
4753 ata_qc_complete(qc);
4756 ata_altstatus(ap); /* flush */
4760 * ata_hsm_move - move the HSM to the next state.
4761 * @ap: the target ata_port
4763 * @status: current device status
4764 * @in_wq: 1 if called from workqueue, 0 otherwise
4767 * 1 when poll next status needed, 0 otherwise.
4769 int ata_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc,
4770 u8 status, int in_wq)
4772 unsigned long flags = 0;
4775 WARN_ON((qc->flags & ATA_QCFLAG_ACTIVE) == 0);
4777 /* Make sure ata_qc_issue_prot() does not throw things
4778 * like DMA polling into the workqueue. Notice that
4779 * in_wq is not equivalent to (qc->tf.flags & ATA_TFLAG_POLLING).
4781 WARN_ON(in_wq != ata_hsm_ok_in_wq(ap, qc));
4784 DPRINTK("ata%u: protocol %d task_state %d (dev_stat 0x%X)\n",
4785 ap->print_id, qc->tf.protocol, ap->hsm_task_state, status);
4787 switch (ap->hsm_task_state) {
4789 /* Send first data block or PACKET CDB */
4791 /* If polling, we will stay in the work queue after
4792 * sending the data. Otherwise, interrupt handler
4793 * takes over after sending the data.
4795 poll_next = (qc->tf.flags & ATA_TFLAG_POLLING);
4797 /* check device status */
4798 if (unlikely((status & ATA_DRQ) == 0)) {
4799 /* handle BSY=0, DRQ=0 as error */
4800 if (likely(status & (ATA_ERR | ATA_DF)))
4801 /* device stops HSM for abort/error */
4802 qc->err_mask |= AC_ERR_DEV;
4804 /* HSM violation. Let EH handle this */
4805 qc->err_mask |= AC_ERR_HSM;
4807 ap->hsm_task_state = HSM_ST_ERR;
4811 /* Device should not ask for data transfer (DRQ=1)
4812 * when it finds something wrong.
4813 * We ignore DRQ here and stop the HSM by
4814 * changing hsm_task_state to HSM_ST_ERR and
4815 * let the EH abort the command or reset the device.
4817 if (unlikely(status & (ATA_ERR | ATA_DF))) {
4818 ata_port_printk(ap, KERN_WARNING, "DRQ=1 with device "
4819 "error, dev_stat 0x%X\n", status);
4820 qc->err_mask |= AC_ERR_HSM;
4821 ap->hsm_task_state = HSM_ST_ERR;
4825 /* Send the CDB (atapi) or the first data block (ata pio out).
4826 * During the state transition, interrupt handler shouldn't
4827 * be invoked before the data transfer is complete and
4828 * hsm_task_state is changed. Hence, the following locking.
4831 spin_lock_irqsave(ap->lock, flags);
4833 if (qc->tf.protocol == ATA_PROT_PIO) {
4834 /* PIO data out protocol.
4835 * send first data block.
4838 /* ata_pio_sectors() might change the state
4839 * to HSM_ST_LAST. so, the state is changed here
4840 * before ata_pio_sectors().
4842 ap->hsm_task_state = HSM_ST;
4843 ata_pio_sectors(qc);
4844 ata_altstatus(ap); /* flush */
4847 atapi_send_cdb(ap, qc);
4850 spin_unlock_irqrestore(ap->lock, flags);
4852 /* if polling, ata_pio_task() handles the rest.
4853 * otherwise, interrupt handler takes over from here.
4858 /* complete command or read/write the data register */
4859 if (qc->tf.protocol == ATA_PROT_ATAPI) {
4860 /* ATAPI PIO protocol */
4861 if ((status & ATA_DRQ) == 0) {
4862 /* No more data to transfer or device error.
4863 * Device error will be tagged in HSM_ST_LAST.
4865 ap->hsm_task_state = HSM_ST_LAST;
4869 /* Device should not ask for data transfer (DRQ=1)
4870 * when it finds something wrong.
4871 * We ignore DRQ here and stop the HSM by
4872 * changing hsm_task_state to HSM_ST_ERR and
4873 * let the EH abort the command or reset the device.
4875 if (unlikely(status & (ATA_ERR | ATA_DF))) {
4876 ata_port_printk(ap, KERN_WARNING, "DRQ=1 with "
4877 "device error, dev_stat 0x%X\n",
4879 qc->err_mask |= AC_ERR_HSM;
4880 ap->hsm_task_state = HSM_ST_ERR;
4884 atapi_pio_bytes(qc);
4886 if (unlikely(ap->hsm_task_state == HSM_ST_ERR))
4887 /* bad ireason reported by device */
4891 /* ATA PIO protocol */
4892 if (unlikely((status & ATA_DRQ) == 0)) {
4893 /* handle BSY=0, DRQ=0 as error */
4894 if (likely(status & (ATA_ERR | ATA_DF)))
4895 /* device stops HSM for abort/error */
4896 qc->err_mask |= AC_ERR_DEV;
4898 /* HSM violation. Let EH handle this.
4899 * Phantom devices also trigger this
4900 * condition. Mark hint.
4902 qc->err_mask |= AC_ERR_HSM |
4905 ap->hsm_task_state = HSM_ST_ERR;
4909 /* For PIO reads, some devices may ask for
4910 * data transfer (DRQ=1) alone with ERR=1.
4911 * We respect DRQ here and transfer one
4912 * block of junk data before changing the
4913 * hsm_task_state to HSM_ST_ERR.
4915 * For PIO writes, ERR=1 DRQ=1 doesn't make
4916 * sense since the data block has been
4917 * transferred to the device.
4919 if (unlikely(status & (ATA_ERR | ATA_DF))) {
4920 /* data might be corrputed */
4921 qc->err_mask |= AC_ERR_DEV;
4923 if (!(qc->tf.flags & ATA_TFLAG_WRITE)) {
4924 ata_pio_sectors(qc);
4926 status = ata_wait_idle(ap);
4929 if (status & (ATA_BUSY | ATA_DRQ))
4930 qc->err_mask |= AC_ERR_HSM;
4932 /* ata_pio_sectors() might change the
4933 * state to HSM_ST_LAST. so, the state
4934 * is changed after ata_pio_sectors().
4936 ap->hsm_task_state = HSM_ST_ERR;
4940 ata_pio_sectors(qc);
4942 if (ap->hsm_task_state == HSM_ST_LAST &&
4943 (!(qc->tf.flags & ATA_TFLAG_WRITE))) {
4946 status = ata_wait_idle(ap);
4951 ata_altstatus(ap); /* flush */
4956 if (unlikely(!ata_ok(status))) {
4957 qc->err_mask |= __ac_err_mask(status);
4958 ap->hsm_task_state = HSM_ST_ERR;
4962 /* no more data to transfer */
4963 DPRINTK("ata%u: dev %u command complete, drv_stat 0x%x\n",
4964 ap->print_id, qc->dev->devno, status);
4966 WARN_ON(qc->err_mask);
4968 ap->hsm_task_state = HSM_ST_IDLE;
4970 /* complete taskfile transaction */
4971 ata_hsm_qc_complete(qc, in_wq);
4977 /* make sure qc->err_mask is available to
4978 * know what's wrong and recover
4980 WARN_ON(qc->err_mask == 0);
4982 ap->hsm_task_state = HSM_ST_IDLE;
4984 /* complete taskfile transaction */
4985 ata_hsm_qc_complete(qc, in_wq);
4997 static void ata_pio_task(struct work_struct *work)
4999 struct ata_port *ap =
5000 container_of(work, struct ata_port, port_task.work);
5001 struct ata_queued_cmd *qc = ap->port_task_data;
5006 WARN_ON(ap->hsm_task_state == HSM_ST_IDLE);
5009 * This is purely heuristic. This is a fast path.
5010 * Sometimes when we enter, BSY will be cleared in
5011 * a chk-status or two. If not, the drive is probably seeking
5012 * or something. Snooze for a couple msecs, then
5013 * chk-status again. If still busy, queue delayed work.
5015 status = ata_busy_wait(ap, ATA_BUSY, 5);
5016 if (status & ATA_BUSY) {
5018 status = ata_busy_wait(ap, ATA_BUSY, 10);
5019 if (status & ATA_BUSY) {
5020 ata_port_queue_task(ap, ata_pio_task, qc, ATA_SHORT_PAUSE);
5026 poll_next = ata_hsm_move(ap, qc, status, 1);
5028 /* another command or interrupt handler
5029 * may be running at this point.
5036 * ata_qc_new - Request an available ATA command, for queueing
5037 * @ap: Port associated with device @dev
5038 * @dev: Device from whom we request an available command structure
5044 static struct ata_queued_cmd *ata_qc_new(struct ata_port *ap)
5046 struct ata_queued_cmd *qc = NULL;
5049 /* no command while frozen */
5050 if (unlikely(ap->pflags & ATA_PFLAG_FROZEN))
5053 /* the last tag is reserved for internal command. */
5054 for (i = 0; i < ATA_MAX_QUEUE - 1; i++)
5055 if (!test_and_set_bit(i, &ap->qc_allocated)) {
5056 qc = __ata_qc_from_tag(ap, i);
5067 * ata_qc_new_init - Request an available ATA command, and initialize it
5068 * @dev: Device from whom we request an available command structure
5074 struct ata_queued_cmd *ata_qc_new_init(struct ata_device *dev)
5076 struct ata_port *ap = dev->ap;
5077 struct ata_queued_cmd *qc;
5079 qc = ata_qc_new(ap);
5092 * ata_qc_free - free unused ata_queued_cmd
5093 * @qc: Command to complete
5095 * Designed to free unused ata_queued_cmd object
5096 * in case something prevents using it.
5099 * spin_lock_irqsave(host lock)
5101 void ata_qc_free(struct ata_queued_cmd *qc)
5103 struct ata_port *ap = qc->ap;
5106 WARN_ON(qc == NULL); /* ata_qc_from_tag _might_ return NULL */
5110 if (likely(ata_tag_valid(tag))) {
5111 qc->tag = ATA_TAG_POISON;
5112 clear_bit(tag, &ap->qc_allocated);
5116 void __ata_qc_complete(struct ata_queued_cmd *qc)
5118 struct ata_port *ap = qc->ap;
5120 WARN_ON(qc == NULL); /* ata_qc_from_tag _might_ return NULL */
5121 WARN_ON(!(qc->flags & ATA_QCFLAG_ACTIVE));
5123 if (likely(qc->flags & ATA_QCFLAG_DMAMAP))
5126 /* command should be marked inactive atomically with qc completion */
5127 if (qc->tf.protocol == ATA_PROT_NCQ)
5128 ap->sactive &= ~(1 << qc->tag);
5130 ap->active_tag = ATA_TAG_POISON;
5132 /* atapi: mark qc as inactive to prevent the interrupt handler
5133 * from completing the command twice later, before the error handler
5134 * is called. (when rc != 0 and atapi request sense is needed)
5136 qc->flags &= ~ATA_QCFLAG_ACTIVE;
5137 ap->qc_active &= ~(1 << qc->tag);
5139 /* call completion callback */
5140 qc->complete_fn(qc);
5143 static void fill_result_tf(struct ata_queued_cmd *qc)
5145 struct ata_port *ap = qc->ap;
5147 qc->result_tf.flags = qc->tf.flags;
5148 ap->ops->tf_read(ap, &qc->result_tf);
5152 * ata_qc_complete - Complete an active ATA command
5153 * @qc: Command to complete
5154 * @err_mask: ATA Status register contents
5156 * Indicate to the mid and upper layers that an ATA
5157 * command has completed, with either an ok or not-ok status.
5160 * spin_lock_irqsave(host lock)
5162 void ata_qc_complete(struct ata_queued_cmd *qc)
5164 struct ata_port *ap = qc->ap;
5166 /* XXX: New EH and old EH use different mechanisms to
5167 * synchronize EH with regular execution path.
5169 * In new EH, a failed qc is marked with ATA_QCFLAG_FAILED.
5170 * Normal execution path is responsible for not accessing a
5171 * failed qc. libata core enforces the rule by returning NULL
5172 * from ata_qc_from_tag() for failed qcs.
5174 * Old EH depends on ata_qc_complete() nullifying completion
5175 * requests if ATA_QCFLAG_EH_SCHEDULED is set. Old EH does
5176 * not synchronize with interrupt handler. Only PIO task is
5179 if (ap->ops->error_handler) {
5180 WARN_ON(ap->pflags & ATA_PFLAG_FROZEN);
5182 if (unlikely(qc->err_mask))
5183 qc->flags |= ATA_QCFLAG_FAILED;
5185 if (unlikely(qc->flags & ATA_QCFLAG_FAILED)) {
5186 if (!ata_tag_internal(qc->tag)) {
5187 /* always fill result TF for failed qc */
5189 ata_qc_schedule_eh(qc);
5194 /* read result TF if requested */
5195 if (qc->flags & ATA_QCFLAG_RESULT_TF)
5198 __ata_qc_complete(qc);
5200 if (qc->flags & ATA_QCFLAG_EH_SCHEDULED)
5203 /* read result TF if failed or requested */
5204 if (qc->err_mask || qc->flags & ATA_QCFLAG_RESULT_TF)
5207 __ata_qc_complete(qc);
5212 * ata_qc_complete_multiple - Complete multiple qcs successfully
5213 * @ap: port in question
5214 * @qc_active: new qc_active mask
5215 * @finish_qc: LLDD callback invoked before completing a qc
5217 * Complete in-flight commands. This functions is meant to be
5218 * called from low-level driver's interrupt routine to complete
5219 * requests normally. ap->qc_active and @qc_active is compared
5220 * and commands are completed accordingly.
5223 * spin_lock_irqsave(host lock)
5226 * Number of completed commands on success, -errno otherwise.
5228 int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active,
5229 void (*finish_qc)(struct ata_queued_cmd *))
5235 done_mask = ap->qc_active ^ qc_active;
5237 if (unlikely(done_mask & qc_active)) {
5238 ata_port_printk(ap, KERN_ERR, "illegal qc_active transition "
5239 "(%08x->%08x)\n", ap->qc_active, qc_active);
5243 for (i = 0; i < ATA_MAX_QUEUE; i++) {
5244 struct ata_queued_cmd *qc;
5246 if (!(done_mask & (1 << i)))
5249 if ((qc = ata_qc_from_tag(ap, i))) {
5252 ata_qc_complete(qc);
5260 static inline int ata_should_dma_map(struct ata_queued_cmd *qc)
5262 struct ata_port *ap = qc->ap;
5264 switch (qc->tf.protocol) {
5267 case ATA_PROT_ATAPI_DMA:
5270 case ATA_PROT_ATAPI:
5272 if (ap->flags & ATA_FLAG_PIO_DMA)
5285 * ata_qc_issue - issue taskfile to device
5286 * @qc: command to issue to device
5288 * Prepare an ATA command to submission to device.
5289 * This includes mapping the data into a DMA-able
5290 * area, filling in the S/G table, and finally
5291 * writing the taskfile to hardware, starting the command.
5294 * spin_lock_irqsave(host lock)
5296 void ata_qc_issue(struct ata_queued_cmd *qc)
5298 struct ata_port *ap = qc->ap;
5300 /* Make sure only one non-NCQ command is outstanding. The
5301 * check is skipped for old EH because it reuses active qc to
5302 * request ATAPI sense.
5304 WARN_ON(ap->ops->error_handler && ata_tag_valid(ap->active_tag));
5306 if (qc->tf.protocol == ATA_PROT_NCQ) {
5307 WARN_ON(ap->sactive & (1 << qc->tag));
5308 ap->sactive |= 1 << qc->tag;
5310 WARN_ON(ap->sactive);
5311 ap->active_tag = qc->tag;
5314 qc->flags |= ATA_QCFLAG_ACTIVE;
5315 ap->qc_active |= 1 << qc->tag;
5317 if (ata_should_dma_map(qc)) {
5318 if (qc->flags & ATA_QCFLAG_SG) {
5319 if (ata_sg_setup(qc))
5321 } else if (qc->flags & ATA_QCFLAG_SINGLE) {
5322 if (ata_sg_setup_one(qc))
5326 qc->flags &= ~ATA_QCFLAG_DMAMAP;
5329 ap->ops->qc_prep(qc);
5331 qc->err_mask |= ap->ops->qc_issue(qc);
5332 if (unlikely(qc->err_mask))
5337 qc->flags &= ~ATA_QCFLAG_DMAMAP;
5338 qc->err_mask |= AC_ERR_SYSTEM;
5340 ata_qc_complete(qc);
5344 * ata_qc_issue_prot - issue taskfile to device in proto-dependent manner
5345 * @qc: command to issue to device
5347 * Using various libata functions and hooks, this function
5348 * starts an ATA command. ATA commands are grouped into
5349 * classes called "protocols", and issuing each type of protocol
5350 * is slightly different.
5352 * May be used as the qc_issue() entry in ata_port_operations.
5355 * spin_lock_irqsave(host lock)
5358 * Zero on success, AC_ERR_* mask on failure
5361 unsigned int ata_qc_issue_prot(struct ata_queued_cmd *qc)
5363 struct ata_port *ap = qc->ap;
5365 /* Use polling pio if the LLD doesn't handle
5366 * interrupt driven pio and atapi CDB interrupt.
5368 if (ap->flags & ATA_FLAG_PIO_POLLING) {
5369 switch (qc->tf.protocol) {
5371 case ATA_PROT_NODATA:
5372 case ATA_PROT_ATAPI:
5373 case ATA_PROT_ATAPI_NODATA:
5374 qc->tf.flags |= ATA_TFLAG_POLLING;
5376 case ATA_PROT_ATAPI_DMA:
5377 if (qc->dev->flags & ATA_DFLAG_CDB_INTR)
5378 /* see ata_dma_blacklisted() */
5386 /* Some controllers show flaky interrupt behavior after
5387 * setting xfer mode. Use polling instead.
5389 if (unlikely(qc->tf.command == ATA_CMD_SET_FEATURES &&
5390 qc->tf.feature == SETFEATURES_XFER) &&
5391 (ap->flags & ATA_FLAG_SETXFER_POLLING))
5392 qc->tf.flags |= ATA_TFLAG_POLLING;
5394 /* select the device */
5395 ata_dev_select(ap, qc->dev->devno, 1, 0);
5397 /* start the command */
5398 switch (qc->tf.protocol) {
5399 case ATA_PROT_NODATA:
5400 if (qc->tf.flags & ATA_TFLAG_POLLING)
5401 ata_qc_set_polling(qc);
5403 ata_tf_to_host(ap, &qc->tf);
5404 ap->hsm_task_state = HSM_ST_LAST;
5406 if (qc->tf.flags & ATA_TFLAG_POLLING)
5407 ata_port_queue_task(ap, ata_pio_task, qc, 0);
5412 WARN_ON(qc->tf.flags & ATA_TFLAG_POLLING);
5414 ap->ops->tf_load(ap, &qc->tf); /* load tf registers */
5415 ap->ops->bmdma_setup(qc); /* set up bmdma */
5416 ap->ops->bmdma_start(qc); /* initiate bmdma */
5417 ap->hsm_task_state = HSM_ST_LAST;
5421 if (qc->tf.flags & ATA_TFLAG_POLLING)
5422 ata_qc_set_polling(qc);
5424 ata_tf_to_host(ap, &qc->tf);
5426 if (qc->tf.flags & ATA_TFLAG_WRITE) {
5427 /* PIO data out protocol */
5428 ap->hsm_task_state = HSM_ST_FIRST;
5429 ata_port_queue_task(ap, ata_pio_task, qc, 0);
5431 /* always send first data block using
5432 * the ata_pio_task() codepath.
5435 /* PIO data in protocol */
5436 ap->hsm_task_state = HSM_ST;
5438 if (qc->tf.flags & ATA_TFLAG_POLLING)
5439 ata_port_queue_task(ap, ata_pio_task, qc, 0);
5441 /* if polling, ata_pio_task() handles the rest.
5442 * otherwise, interrupt handler takes over from here.
5448 case ATA_PROT_ATAPI:
5449 case ATA_PROT_ATAPI_NODATA:
5450 if (qc->tf.flags & ATA_TFLAG_POLLING)
5451 ata_qc_set_polling(qc);
5453 ata_tf_to_host(ap, &qc->tf);
5455 ap->hsm_task_state = HSM_ST_FIRST;
5457 /* send cdb by polling if no cdb interrupt */
5458 if ((!(qc->dev->flags & ATA_DFLAG_CDB_INTR)) ||
5459 (qc->tf.flags & ATA_TFLAG_POLLING))
5460 ata_port_queue_task(ap, ata_pio_task, qc, 0);
5463 case ATA_PROT_ATAPI_DMA:
5464 WARN_ON(qc->tf.flags & ATA_TFLAG_POLLING);
5466 ap->ops->tf_load(ap, &qc->tf); /* load tf registers */
5467 ap->ops->bmdma_setup(qc); /* set up bmdma */
5468 ap->hsm_task_state = HSM_ST_FIRST;
5470 /* send cdb by polling if no cdb interrupt */
5471 if (!(qc->dev->flags & ATA_DFLAG_CDB_INTR))
5472 ata_port_queue_task(ap, ata_pio_task, qc, 0);
5477 return AC_ERR_SYSTEM;
5484 * ata_host_intr - Handle host interrupt for given (port, task)
5485 * @ap: Port on which interrupt arrived (possibly...)
5486 * @qc: Taskfile currently active in engine
5488 * Handle host interrupt for given queued command. Currently,
5489 * only DMA interrupts are handled. All other commands are
5490 * handled via polling with interrupts disabled (nIEN bit).
5493 * spin_lock_irqsave(host lock)
5496 * One if interrupt was handled, zero if not (shared irq).
5499 inline unsigned int ata_host_intr (struct ata_port *ap,
5500 struct ata_queued_cmd *qc)
5502 struct ata_eh_info *ehi = &ap->eh_info;
5503 u8 status, host_stat = 0;
5505 VPRINTK("ata%u: protocol %d task_state %d\n",
5506 ap->print_id, qc->tf.protocol, ap->hsm_task_state);
5508 /* Check whether we are expecting interrupt in this state */
5509 switch (ap->hsm_task_state) {
5511 /* Some pre-ATAPI-4 devices assert INTRQ
5512 * at this state when ready to receive CDB.
5515 /* Check the ATA_DFLAG_CDB_INTR flag is enough here.
5516 * The flag was turned on only for atapi devices.
5517 * No need to check is_atapi_taskfile(&qc->tf) again.
5519 if (!(qc->dev->flags & ATA_DFLAG_CDB_INTR))
5523 if (qc->tf.protocol == ATA_PROT_DMA ||
5524 qc->tf.protocol == ATA_PROT_ATAPI_DMA) {
5525 /* check status of DMA engine */
5526 host_stat = ap->ops->bmdma_status(ap);
5527 VPRINTK("ata%u: host_stat 0x%X\n",
5528 ap->print_id, host_stat);
5530 /* if it's not our irq... */
5531 if (!(host_stat & ATA_DMA_INTR))
5534 /* before we do anything else, clear DMA-Start bit */
5535 ap->ops->bmdma_stop(qc);
5537 if (unlikely(host_stat & ATA_DMA_ERR)) {
5538 /* error when transfering data to/from memory */
5539 qc->err_mask |= AC_ERR_HOST_BUS;
5540 ap->hsm_task_state = HSM_ST_ERR;
5550 /* check altstatus */
5551 status = ata_altstatus(ap);
5552 if (status & ATA_BUSY)
5555 /* check main status, clearing INTRQ */
5556 status = ata_chk_status(ap);
5557 if (unlikely(status & ATA_BUSY))
5560 /* ack bmdma irq events */
5561 ap->ops->irq_clear(ap);
5563 ata_hsm_move(ap, qc, status, 0);
5565 if (unlikely(qc->err_mask) && (qc->tf.protocol == ATA_PROT_DMA ||
5566 qc->tf.protocol == ATA_PROT_ATAPI_DMA))
5567 ata_ehi_push_desc(ehi, "BMDMA stat 0x%x", host_stat);
5569 return 1; /* irq handled */
5572 ap->stats.idle_irq++;
5575 if ((ap->stats.idle_irq % 1000) == 0) {
5576 ap->ops->irq_ack(ap, 0); /* debug trap */
5577 ata_port_printk(ap, KERN_WARNING, "irq trap\n");
5581 return 0; /* irq not handled */
5585 * ata_interrupt - Default ATA host interrupt handler
5586 * @irq: irq line (unused)
5587 * @dev_instance: pointer to our ata_host information structure
5589 * Default interrupt handler for PCI IDE devices. Calls
5590 * ata_host_intr() for each port that is not disabled.
5593 * Obtains host lock during operation.
5596 * IRQ_NONE or IRQ_HANDLED.
5599 irqreturn_t ata_interrupt (int irq, void *dev_instance)
5601 struct ata_host *host = dev_instance;
5603 unsigned int handled = 0;
5604 unsigned long flags;
5606 /* TODO: make _irqsave conditional on x86 PCI IDE legacy mode */
5607 spin_lock_irqsave(&host->lock, flags);
5609 for (i = 0; i < host->n_ports; i++) {
5610 struct ata_port *ap;
5612 ap = host->ports[i];
5614 !(ap->flags & ATA_FLAG_DISABLED)) {
5615 struct ata_queued_cmd *qc;
5617 qc = ata_qc_from_tag(ap, ap->active_tag);
5618 if (qc && (!(qc->tf.flags & ATA_TFLAG_POLLING)) &&
5619 (qc->flags & ATA_QCFLAG_ACTIVE))
5620 handled |= ata_host_intr(ap, qc);
5624 spin_unlock_irqrestore(&host->lock, flags);
5626 return IRQ_RETVAL(handled);
5630 * sata_scr_valid - test whether SCRs are accessible
5631 * @ap: ATA port to test SCR accessibility for
5633 * Test whether SCRs are accessible for @ap.
5639 * 1 if SCRs are accessible, 0 otherwise.
5641 int sata_scr_valid(struct ata_port *ap)
5643 return ap->cbl == ATA_CBL_SATA && ap->ops->scr_read;
5647 * sata_scr_read - read SCR register of the specified port
5648 * @ap: ATA port to read SCR for
5650 * @val: Place to store read value
5652 * Read SCR register @reg of @ap into *@val. This function is
5653 * guaranteed to succeed if the cable type of the port is SATA
5654 * and the port implements ->scr_read.
5660 * 0 on success, negative errno on failure.
5662 int sata_scr_read(struct ata_port *ap, int reg, u32 *val)
5664 if (sata_scr_valid(ap)) {
5665 *val = ap->ops->scr_read(ap, reg);
5672 * sata_scr_write - write SCR register of the specified port
5673 * @ap: ATA port to write SCR for
5674 * @reg: SCR to write
5675 * @val: value to write
5677 * Write @val to SCR register @reg of @ap. This function is
5678 * guaranteed to succeed if the cable type of the port is SATA
5679 * and the port implements ->scr_read.
5685 * 0 on success, negative errno on failure.
5687 int sata_scr_write(struct ata_port *ap, int reg, u32 val)
5689 if (sata_scr_valid(ap)) {
5690 ap->ops->scr_write(ap, reg, val);
5697 * sata_scr_write_flush - write SCR register of the specified port and flush
5698 * @ap: ATA port to write SCR for
5699 * @reg: SCR to write
5700 * @val: value to write
5702 * This function is identical to sata_scr_write() except that this
5703 * function performs flush after writing to the register.
5709 * 0 on success, negative errno on failure.
5711 int sata_scr_write_flush(struct ata_port *ap, int reg, u32 val)
5713 if (sata_scr_valid(ap)) {
5714 ap->ops->scr_write(ap, reg, val);
5715 ap->ops->scr_read(ap, reg);
5722 * ata_port_online - test whether the given port is online
5723 * @ap: ATA port to test
5725 * Test whether @ap is online. Note that this function returns 0
5726 * if online status of @ap cannot be obtained, so
5727 * ata_port_online(ap) != !ata_port_offline(ap).
5733 * 1 if the port online status is available and online.
5735 int ata_port_online(struct ata_port *ap)
5739 if (!sata_scr_read(ap, SCR_STATUS, &sstatus) && (sstatus & 0xf) == 0x3)
5745 * ata_port_offline - test whether the given port is offline
5746 * @ap: ATA port to test
5748 * Test whether @ap is offline. Note that this function returns
5749 * 0 if offline status of @ap cannot be obtained, so
5750 * ata_port_online(ap) != !ata_port_offline(ap).
5756 * 1 if the port offline status is available and offline.
5758 int ata_port_offline(struct ata_port *ap)
5762 if (!sata_scr_read(ap, SCR_STATUS, &sstatus) && (sstatus & 0xf) != 0x3)
5767 int ata_flush_cache(struct ata_device *dev)
5769 unsigned int err_mask;
5772 if (!ata_try_flush_cache(dev))
5775 if (dev->flags & ATA_DFLAG_FLUSH_EXT)
5776 cmd = ATA_CMD_FLUSH_EXT;
5778 cmd = ATA_CMD_FLUSH;
5780 err_mask = ata_do_simple_cmd(dev, cmd);
5782 ata_dev_printk(dev, KERN_ERR, "failed to flush cache\n");
5790 static int ata_host_request_pm(struct ata_host *host, pm_message_t mesg,
5791 unsigned int action, unsigned int ehi_flags,
5794 unsigned long flags;
5797 for (i = 0; i < host->n_ports; i++) {
5798 struct ata_port *ap = host->ports[i];
5800 /* Previous resume operation might still be in
5801 * progress. Wait for PM_PENDING to clear.
5803 if (ap->pflags & ATA_PFLAG_PM_PENDING) {
5804 ata_port_wait_eh(ap);
5805 WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING);
5808 /* request PM ops to EH */
5809 spin_lock_irqsave(ap->lock, flags);
5814 ap->pm_result = &rc;
5817 ap->pflags |= ATA_PFLAG_PM_PENDING;
5818 ap->eh_info.action |= action;
5819 ap->eh_info.flags |= ehi_flags;
5821 ata_port_schedule_eh(ap);
5823 spin_unlock_irqrestore(ap->lock, flags);
5825 /* wait and check result */
5827 ata_port_wait_eh(ap);
5828 WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING);
5838 * ata_host_suspend - suspend host
5839 * @host: host to suspend
5842 * Suspend @host. Actual operation is performed by EH. This
5843 * function requests EH to perform PM operations and waits for EH
5847 * Kernel thread context (may sleep).
5850 * 0 on success, -errno on failure.
5852 int ata_host_suspend(struct ata_host *host, pm_message_t mesg)
5856 rc = ata_host_request_pm(host, mesg, 0, ATA_EHI_QUIET, 1);
5858 host->dev->power.power_state = mesg;
5863 * ata_host_resume - resume host
5864 * @host: host to resume
5866 * Resume @host. Actual operation is performed by EH. This
5867 * function requests EH to perform PM operations and returns.
5868 * Note that all resume operations are performed parallely.
5871 * Kernel thread context (may sleep).
5873 void ata_host_resume(struct ata_host *host)
5875 ata_host_request_pm(host, PMSG_ON, ATA_EH_SOFTRESET,
5876 ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET, 0);
5877 host->dev->power.power_state = PMSG_ON;
5882 * ata_port_start - Set port up for dma.
5883 * @ap: Port to initialize
5885 * Called just after data structures for each port are
5886 * initialized. Allocates space for PRD table.
5888 * May be used as the port_start() entry in ata_port_operations.
5891 * Inherited from caller.
5893 int ata_port_start(struct ata_port *ap)
5895 struct device *dev = ap->dev;
5898 ap->prd = dmam_alloc_coherent(dev, ATA_PRD_TBL_SZ, &ap->prd_dma,
5903 rc = ata_pad_alloc(ap, dev);
5907 DPRINTK("prd alloc, virt %p, dma %llx\n", ap->prd,
5908 (unsigned long long)ap->prd_dma);
5913 * ata_dev_init - Initialize an ata_device structure
5914 * @dev: Device structure to initialize
5916 * Initialize @dev in preparation for probing.
5919 * Inherited from caller.
5921 void ata_dev_init(struct ata_device *dev)
5923 struct ata_port *ap = dev->ap;
5924 unsigned long flags;
5926 /* SATA spd limit is bound to the first device */
5927 ap->sata_spd_limit = ap->hw_sata_spd_limit;
5929 /* High bits of dev->flags are used to record warm plug
5930 * requests which occur asynchronously. Synchronize using
5933 spin_lock_irqsave(ap->lock, flags);
5934 dev->flags &= ~ATA_DFLAG_INIT_MASK;
5935 spin_unlock_irqrestore(ap->lock, flags);
5937 memset((void *)dev + ATA_DEVICE_CLEAR_OFFSET, 0,
5938 sizeof(*dev) - ATA_DEVICE_CLEAR_OFFSET);
5939 dev->pio_mask = UINT_MAX;
5940 dev->mwdma_mask = UINT_MAX;
5941 dev->udma_mask = UINT_MAX;
5945 * ata_port_alloc - allocate and initialize basic ATA port resources
5946 * @host: ATA host this allocated port belongs to
5948 * Allocate and initialize basic ATA port resources.
5951 * Allocate ATA port on success, NULL on failure.
5954 * Inherited from calling layer (may sleep).
5956 struct ata_port *ata_port_alloc(struct ata_host *host)
5958 struct ata_port *ap;
5963 ap = kzalloc(sizeof(*ap), GFP_KERNEL);
5967 ap->pflags |= ATA_PFLAG_INITIALIZING;
5968 ap->lock = &host->lock;
5969 ap->flags = ATA_FLAG_DISABLED;
5971 ap->ctl = ATA_DEVCTL_OBS;
5973 ap->dev = host->dev;
5975 ap->hw_sata_spd_limit = UINT_MAX;
5976 ap->active_tag = ATA_TAG_POISON;
5977 ap->last_ctl = 0xFF;
5979 #if defined(ATA_VERBOSE_DEBUG)
5980 /* turn on all debugging levels */
5981 ap->msg_enable = 0x00FF;
5982 #elif defined(ATA_DEBUG)
5983 ap->msg_enable = ATA_MSG_DRV | ATA_MSG_INFO | ATA_MSG_CTL | ATA_MSG_WARN | ATA_MSG_ERR;
5985 ap->msg_enable = ATA_MSG_DRV | ATA_MSG_ERR | ATA_MSG_WARN;
5988 INIT_DELAYED_WORK(&ap->port_task, NULL);
5989 INIT_DELAYED_WORK(&ap->hotplug_task, ata_scsi_hotplug);
5990 INIT_WORK(&ap->scsi_rescan_task, ata_scsi_dev_rescan);
5991 INIT_LIST_HEAD(&ap->eh_done_q);
5992 init_waitqueue_head(&ap->eh_wait_q);
5994 ap->cbl = ATA_CBL_NONE;
5996 for (i = 0; i < ATA_MAX_DEVICES; i++) {
5997 struct ata_device *dev = &ap->device[i];
6004 ap->stats.unhandled_irq = 1;
6005 ap->stats.idle_irq = 1;
6010 static void ata_host_release(struct device *gendev, void *res)
6012 struct ata_host *host = dev_get_drvdata(gendev);
6015 for (i = 0; i < host->n_ports; i++) {
6016 struct ata_port *ap = host->ports[i];
6021 if ((host->flags & ATA_HOST_STARTED) && ap->ops->port_stop)
6022 ap->ops->port_stop(ap);
6025 if ((host->flags & ATA_HOST_STARTED) && host->ops->host_stop)
6026 host->ops->host_stop(host);
6028 for (i = 0; i < host->n_ports; i++) {
6029 struct ata_port *ap = host->ports[i];
6035 scsi_host_put(ap->scsi_host);
6038 host->ports[i] = NULL;
6041 dev_set_drvdata(gendev, NULL);
6045 * ata_host_alloc - allocate and init basic ATA host resources
6046 * @dev: generic device this host is associated with
6047 * @max_ports: maximum number of ATA ports associated with this host
6049 * Allocate and initialize basic ATA host resources. LLD calls
6050 * this function to allocate a host, initializes it fully and
6051 * attaches it using ata_host_register().
6053 * @max_ports ports are allocated and host->n_ports is
6054 * initialized to @max_ports. The caller is allowed to decrease
6055 * host->n_ports before calling ata_host_register(). The unused
6056 * ports will be automatically freed on registration.
6059 * Allocate ATA host on success, NULL on failure.
6062 * Inherited from calling layer (may sleep).
6064 struct ata_host *ata_host_alloc(struct device *dev, int max_ports)
6066 struct ata_host *host;
6072 if (!devres_open_group(dev, NULL, GFP_KERNEL))
6075 /* alloc a container for our list of ATA ports (buses) */
6076 sz = sizeof(struct ata_host) + (max_ports + 1) * sizeof(void *);
6077 /* alloc a container for our list of ATA ports (buses) */
6078 host = devres_alloc(ata_host_release, sz, GFP_KERNEL);
6082 devres_add(dev, host);
6083 dev_set_drvdata(dev, host);
6085 spin_lock_init(&host->lock);
6087 host->n_ports = max_ports;
6089 /* allocate ports bound to this host */
6090 for (i = 0; i < max_ports; i++) {
6091 struct ata_port *ap;
6093 ap = ata_port_alloc(host);
6098 host->ports[i] = ap;
6101 devres_remove_group(dev, NULL);
6105 devres_release_group(dev, NULL);
6110 * ata_host_alloc_pinfo - alloc host and init with port_info array
6111 * @dev: generic device this host is associated with
6112 * @ppi: array of ATA port_info to initialize host with
6113 * @n_ports: number of ATA ports attached to this host
6115 * Allocate ATA host and initialize with info from @ppi. If NULL
6116 * terminated, @ppi may contain fewer entries than @n_ports. The
6117 * last entry will be used for the remaining ports.
6120 * Allocate ATA host on success, NULL on failure.
6123 * Inherited from calling layer (may sleep).
6125 struct ata_host *ata_host_alloc_pinfo(struct device *dev,
6126 const struct ata_port_info * const * ppi,
6129 const struct ata_port_info *pi;
6130 struct ata_host *host;
6133 host = ata_host_alloc(dev, n_ports);
6137 for (i = 0, j = 0, pi = NULL; i < host->n_ports; i++) {
6138 struct ata_port *ap = host->ports[i];
6143 ap->pio_mask = pi->pio_mask;
6144 ap->mwdma_mask = pi->mwdma_mask;
6145 ap->udma_mask = pi->udma_mask;
6146 ap->flags |= pi->flags;
6147 ap->ops = pi->port_ops;
6149 if (!host->ops && (pi->port_ops != &ata_dummy_port_ops))
6150 host->ops = pi->port_ops;
6151 if (!host->private_data && pi->private_data)
6152 host->private_data = pi->private_data;
6159 * ata_host_start - start and freeze ports of an ATA host
6160 * @host: ATA host to start ports for
6162 * Start and then freeze ports of @host. Started status is
6163 * recorded in host->flags, so this function can be called
6164 * multiple times. Ports are guaranteed to get started only
6165 * once. If host->ops isn't initialized yet, its set to the
6166 * first non-dummy port ops.
6169 * Inherited from calling layer (may sleep).
6172 * 0 if all ports are started successfully, -errno otherwise.
6174 int ata_host_start(struct ata_host *host)
6178 if (host->flags & ATA_HOST_STARTED)
6181 for (i = 0; i < host->n_ports; i++) {
6182 struct ata_port *ap = host->ports[i];
6184 if (!host->ops && !ata_port_is_dummy(ap))
6185 host->ops = ap->ops;
6187 if (ap->ops->port_start) {
6188 rc = ap->ops->port_start(ap);
6190 ata_port_printk(ap, KERN_ERR, "failed to "
6191 "start port (errno=%d)\n", rc);
6196 ata_eh_freeze_port(ap);
6199 host->flags |= ATA_HOST_STARTED;
6204 struct ata_port *ap = host->ports[i];
6206 if (ap->ops->port_stop)
6207 ap->ops->port_stop(ap);
6213 * ata_sas_host_init - Initialize a host struct
6214 * @host: host to initialize
6215 * @dev: device host is attached to
6216 * @flags: host flags
6220 * PCI/etc. bus probe sem.
6223 /* KILLME - the only user left is ipr */
6224 void ata_host_init(struct ata_host *host, struct device *dev,
6225 unsigned long flags, const struct ata_port_operations *ops)
6227 spin_lock_init(&host->lock);
6229 host->flags = flags;
6234 * ata_host_register - register initialized ATA host
6235 * @host: ATA host to register
6236 * @sht: template for SCSI host
6238 * Register initialized ATA host. @host is allocated using
6239 * ata_host_alloc() and fully initialized by LLD. This function
6240 * starts ports, registers @host with ATA and SCSI layers and
6241 * probe registered devices.
6244 * Inherited from calling layer (may sleep).
6247 * 0 on success, -errno otherwise.
6249 int ata_host_register(struct ata_host *host, struct scsi_host_template *sht)
6253 /* host must have been started */
6254 if (!(host->flags & ATA_HOST_STARTED)) {
6255 dev_printk(KERN_ERR, host->dev,
6256 "BUG: trying to register unstarted host\n");
6261 /* Blow away unused ports. This happens when LLD can't
6262 * determine the exact number of ports to allocate at
6265 for (i = host->n_ports; host->ports[i]; i++)
6266 kfree(host->ports[i]);
6268 /* give ports names and add SCSI hosts */
6269 for (i = 0; i < host->n_ports; i++)
6270 host->ports[i]->print_id = ata_print_id++;
6272 rc = ata_scsi_add_hosts(host, sht);
6276 /* set cable, sata_spd_limit and report */
6277 for (i = 0; i < host->n_ports; i++) {
6278 struct ata_port *ap = host->ports[i];
6281 unsigned long xfer_mask;
6283 /* set SATA cable type if still unset */
6284 if (ap->cbl == ATA_CBL_NONE && (ap->flags & ATA_FLAG_SATA))
6285 ap->cbl = ATA_CBL_SATA;
6287 /* init sata_spd_limit to the current value */
6288 if (sata_scr_read(ap, SCR_CONTROL, &scontrol) == 0) {
6289 int spd = (scontrol >> 4) & 0xf;
6290 ap->hw_sata_spd_limit &= (1 << spd) - 1;
6292 ap->sata_spd_limit = ap->hw_sata_spd_limit;
6294 /* report the secondary IRQ for second channel legacy */
6295 irq_line = host->irq;
6296 if (i == 1 && host->irq2)
6297 irq_line = host->irq2;
6299 xfer_mask = ata_pack_xfermask(ap->pio_mask, ap->mwdma_mask,
6302 /* print per-port info to dmesg */
6303 if (!ata_port_is_dummy(ap))
6304 ata_port_printk(ap, KERN_INFO, "%cATA max %s cmd 0x%p "
6305 "ctl 0x%p bmdma 0x%p irq %d\n",
6306 ap->cbl == ATA_CBL_SATA ? 'S' : 'P',
6307 ata_mode_string(xfer_mask),
6308 ap->ioaddr.cmd_addr,
6309 ap->ioaddr.ctl_addr,
6310 ap->ioaddr.bmdma_addr,
6313 ata_port_printk(ap, KERN_INFO, "DUMMY\n");
6316 /* perform each probe synchronously */
6317 DPRINTK("probe begin\n");
6318 for (i = 0; i < host->n_ports; i++) {
6319 struct ata_port *ap = host->ports[i];
6323 if (ap->ops->error_handler) {
6324 struct ata_eh_info *ehi = &ap->eh_info;
6325 unsigned long flags;
6329 /* kick EH for boot probing */
6330 spin_lock_irqsave(ap->lock, flags);
6332 ehi->probe_mask = (1 << ATA_MAX_DEVICES) - 1;
6333 ehi->action |= ATA_EH_SOFTRESET;
6334 ehi->flags |= ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET;
6336 ap->pflags &= ~ATA_PFLAG_INITIALIZING;
6337 ap->pflags |= ATA_PFLAG_LOADING;
6338 ata_port_schedule_eh(ap);
6340 spin_unlock_irqrestore(ap->lock, flags);
6342 /* wait for EH to finish */
6343 ata_port_wait_eh(ap);
6345 DPRINTK("ata%u: bus probe begin\n", ap->print_id);
6346 rc = ata_bus_probe(ap);
6347 DPRINTK("ata%u: bus probe end\n", ap->print_id);
6350 /* FIXME: do something useful here?
6351 * Current libata behavior will
6352 * tear down everything when
6353 * the module is removed
6354 * or the h/w is unplugged.
6360 /* probes are done, now scan each port's disk(s) */
6361 DPRINTK("host probe begin\n");
6362 for (i = 0; i < host->n_ports; i++) {
6363 struct ata_port *ap = host->ports[i];
6365 ata_scsi_scan_host(ap);
6372 * ata_host_activate - start host, request IRQ and register it
6373 * @host: target ATA host
6374 * @irq: IRQ to request
6375 * @irq_handler: irq_handler used when requesting IRQ
6376 * @irq_flags: irq_flags used when requesting IRQ
6377 * @sht: scsi_host_template to use when registering the host
6379 * After allocating an ATA host and initializing it, most libata
6380 * LLDs perform three steps to activate the host - start host,
6381 * request IRQ and register it. This helper takes necessasry
6382 * arguments and performs the three steps in one go.
6385 * Inherited from calling layer (may sleep).
6388 * 0 on success, -errno otherwise.
6390 int ata_host_activate(struct ata_host *host, int irq,
6391 irq_handler_t irq_handler, unsigned long irq_flags,
6392 struct scsi_host_template *sht)
6396 rc = ata_host_start(host);
6400 rc = devm_request_irq(host->dev, irq, irq_handler, irq_flags,
6401 dev_driver_string(host->dev), host);
6405 rc = ata_host_register(host, sht);
6406 /* if failed, just free the IRQ and leave ports alone */
6408 devm_free_irq(host->dev, irq, host);
6414 * ata_port_detach - Detach ATA port in prepration of device removal
6415 * @ap: ATA port to be detached
6417 * Detach all ATA devices and the associated SCSI devices of @ap;
6418 * then, remove the associated SCSI host. @ap is guaranteed to
6419 * be quiescent on return from this function.
6422 * Kernel thread context (may sleep).
6424 void ata_port_detach(struct ata_port *ap)
6426 unsigned long flags;
6429 if (!ap->ops->error_handler)
6432 /* tell EH we're leaving & flush EH */
6433 spin_lock_irqsave(ap->lock, flags);
6434 ap->pflags |= ATA_PFLAG_UNLOADING;
6435 spin_unlock_irqrestore(ap->lock, flags);
6437 ata_port_wait_eh(ap);
6439 /* EH is now guaranteed to see UNLOADING, so no new device
6440 * will be attached. Disable all existing devices.
6442 spin_lock_irqsave(ap->lock, flags);
6444 for (i = 0; i < ATA_MAX_DEVICES; i++)
6445 ata_dev_disable(&ap->device[i]);
6447 spin_unlock_irqrestore(ap->lock, flags);
6449 /* Final freeze & EH. All in-flight commands are aborted. EH
6450 * will be skipped and retrials will be terminated with bad
6453 spin_lock_irqsave(ap->lock, flags);
6454 ata_port_freeze(ap); /* won't be thawed */
6455 spin_unlock_irqrestore(ap->lock, flags);
6457 ata_port_wait_eh(ap);
6459 /* Flush hotplug task. The sequence is similar to
6460 * ata_port_flush_task().
6462 cancel_work_sync(&ap->hotplug_task.work); /* akpm: why? */
6463 cancel_delayed_work(&ap->hotplug_task);
6464 cancel_work_sync(&ap->hotplug_task.work);
6467 /* remove the associated SCSI host */
6468 scsi_remove_host(ap->scsi_host);
6472 * ata_host_detach - Detach all ports of an ATA host
6473 * @host: Host to detach
6475 * Detach all ports of @host.
6478 * Kernel thread context (may sleep).
6480 void ata_host_detach(struct ata_host *host)
6484 for (i = 0; i < host->n_ports; i++)
6485 ata_port_detach(host->ports[i]);
6489 * ata_std_ports - initialize ioaddr with standard port offsets.
6490 * @ioaddr: IO address structure to be initialized
6492 * Utility function which initializes data_addr, error_addr,
6493 * feature_addr, nsect_addr, lbal_addr, lbam_addr, lbah_addr,
6494 * device_addr, status_addr, and command_addr to standard offsets
6495 * relative to cmd_addr.
6497 * Does not set ctl_addr, altstatus_addr, bmdma_addr, or scr_addr.
6500 void ata_std_ports(struct ata_ioports *ioaddr)
6502 ioaddr->data_addr = ioaddr->cmd_addr + ATA_REG_DATA;
6503 ioaddr->error_addr = ioaddr->cmd_addr + ATA_REG_ERR;
6504 ioaddr->feature_addr = ioaddr->cmd_addr + ATA_REG_FEATURE;
6505 ioaddr->nsect_addr = ioaddr->cmd_addr + ATA_REG_NSECT;
6506 ioaddr->lbal_addr = ioaddr->cmd_addr + ATA_REG_LBAL;
6507 ioaddr->lbam_addr = ioaddr->cmd_addr + ATA_REG_LBAM;
6508 ioaddr->lbah_addr = ioaddr->cmd_addr + ATA_REG_LBAH;
6509 ioaddr->device_addr = ioaddr->cmd_addr + ATA_REG_DEVICE;
6510 ioaddr->status_addr = ioaddr->cmd_addr + ATA_REG_STATUS;
6511 ioaddr->command_addr = ioaddr->cmd_addr + ATA_REG_CMD;
6518 * ata_pci_remove_one - PCI layer callback for device removal
6519 * @pdev: PCI device that was removed
6521 * PCI layer indicates to libata via this hook that hot-unplug or
6522 * module unload event has occurred. Detach all ports. Resource
6523 * release is handled via devres.
6526 * Inherited from PCI layer (may sleep).
6528 void ata_pci_remove_one(struct pci_dev *pdev)
6530 struct device *dev = pci_dev_to_dev(pdev);
6531 struct ata_host *host = dev_get_drvdata(dev);
6533 ata_host_detach(host);
6536 /* move to PCI subsystem */
6537 int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits)
6539 unsigned long tmp = 0;
6541 switch (bits->width) {
6544 pci_read_config_byte(pdev, bits->reg, &tmp8);
6550 pci_read_config_word(pdev, bits->reg, &tmp16);
6556 pci_read_config_dword(pdev, bits->reg, &tmp32);
6567 return (tmp == bits->val) ? 1 : 0;
6571 void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg)
6573 pci_save_state(pdev);
6574 pci_disable_device(pdev);
6576 if (mesg.event == PM_EVENT_SUSPEND)
6577 pci_set_power_state(pdev, PCI_D3hot);
6580 int ata_pci_device_do_resume(struct pci_dev *pdev)
6584 pci_set_power_state(pdev, PCI_D0);
6585 pci_restore_state(pdev);
6587 rc = pcim_enable_device(pdev);
6589 dev_printk(KERN_ERR, &pdev->dev,
6590 "failed to enable device after resume (%d)\n", rc);
6594 pci_set_master(pdev);
6598 int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg)
6600 struct ata_host *host = dev_get_drvdata(&pdev->dev);
6603 rc = ata_host_suspend(host, mesg);
6607 ata_pci_device_do_suspend(pdev, mesg);
6612 int ata_pci_device_resume(struct pci_dev *pdev)
6614 struct ata_host *host = dev_get_drvdata(&pdev->dev);
6617 rc = ata_pci_device_do_resume(pdev);
6619 ata_host_resume(host);
6622 #endif /* CONFIG_PM */
6624 #endif /* CONFIG_PCI */
6627 static int __init ata_init(void)
6629 ata_probe_timeout *= HZ;
6630 ata_wq = create_workqueue("ata");
6634 ata_aux_wq = create_singlethread_workqueue("ata_aux");
6636 destroy_workqueue(ata_wq);
6640 printk(KERN_DEBUG "libata version " DRV_VERSION " loaded.\n");
6644 static void __exit ata_exit(void)
6646 destroy_workqueue(ata_wq);
6647 destroy_workqueue(ata_aux_wq);
6650 subsys_initcall(ata_init);
6651 module_exit(ata_exit);
6653 static unsigned long ratelimit_time;
6654 static DEFINE_SPINLOCK(ata_ratelimit_lock);
6656 int ata_ratelimit(void)
6659 unsigned long flags;
6661 spin_lock_irqsave(&ata_ratelimit_lock, flags);
6663 if (time_after(jiffies, ratelimit_time)) {
6665 ratelimit_time = jiffies + (HZ/5);
6669 spin_unlock_irqrestore(&ata_ratelimit_lock, flags);
6675 * ata_wait_register - wait until register value changes
6676 * @reg: IO-mapped register
6677 * @mask: Mask to apply to read register value
6678 * @val: Wait condition
6679 * @interval_msec: polling interval in milliseconds
6680 * @timeout_msec: timeout in milliseconds
6682 * Waiting for some bits of register to change is a common
6683 * operation for ATA controllers. This function reads 32bit LE
6684 * IO-mapped register @reg and tests for the following condition.
6686 * (*@reg & mask) != val
6688 * If the condition is met, it returns; otherwise, the process is
6689 * repeated after @interval_msec until timeout.
6692 * Kernel thread context (may sleep)
6695 * The final register value.
6697 u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val,
6698 unsigned long interval_msec,
6699 unsigned long timeout_msec)
6701 unsigned long timeout;
6704 tmp = ioread32(reg);
6706 /* Calculate timeout _after_ the first read to make sure
6707 * preceding writes reach the controller before starting to
6708 * eat away the timeout.
6710 timeout = jiffies + (timeout_msec * HZ) / 1000;
6712 while ((tmp & mask) == val && time_before(jiffies, timeout)) {
6713 msleep(interval_msec);
6714 tmp = ioread32(reg);
6723 static void ata_dummy_noret(struct ata_port *ap) { }
6724 static int ata_dummy_ret0(struct ata_port *ap) { return 0; }
6725 static void ata_dummy_qc_noret(struct ata_queued_cmd *qc) { }
6727 static u8 ata_dummy_check_status(struct ata_port *ap)
6732 static unsigned int ata_dummy_qc_issue(struct ata_queued_cmd *qc)
6734 return AC_ERR_SYSTEM;
6737 const struct ata_port_operations ata_dummy_port_ops = {
6738 .port_disable = ata_port_disable,
6739 .check_status = ata_dummy_check_status,
6740 .check_altstatus = ata_dummy_check_status,
6741 .dev_select = ata_noop_dev_select,
6742 .qc_prep = ata_noop_qc_prep,
6743 .qc_issue = ata_dummy_qc_issue,
6744 .freeze = ata_dummy_noret,
6745 .thaw = ata_dummy_noret,
6746 .error_handler = ata_dummy_noret,
6747 .post_internal_cmd = ata_dummy_qc_noret,
6748 .irq_clear = ata_dummy_noret,
6749 .port_start = ata_dummy_ret0,
6750 .port_stop = ata_dummy_noret,
6753 const struct ata_port_info ata_dummy_port_info = {
6754 .port_ops = &ata_dummy_port_ops,
6758 * libata is essentially a library of internal helper functions for
6759 * low-level ATA host controller drivers. As such, the API/ABI is
6760 * likely to change as new drivers are added and updated.
6761 * Do not depend on ABI/API stability.
6764 EXPORT_SYMBOL_GPL(sata_deb_timing_normal);
6765 EXPORT_SYMBOL_GPL(sata_deb_timing_hotplug);
6766 EXPORT_SYMBOL_GPL(sata_deb_timing_long);
6767 EXPORT_SYMBOL_GPL(ata_dummy_port_ops);
6768 EXPORT_SYMBOL_GPL(ata_dummy_port_info);
6769 EXPORT_SYMBOL_GPL(ata_std_bios_param);
6770 EXPORT_SYMBOL_GPL(ata_std_ports);
6771 EXPORT_SYMBOL_GPL(ata_host_init);
6772 EXPORT_SYMBOL_GPL(ata_host_alloc);
6773 EXPORT_SYMBOL_GPL(ata_host_alloc_pinfo);
6774 EXPORT_SYMBOL_GPL(ata_host_start);
6775 EXPORT_SYMBOL_GPL(ata_host_register);
6776 EXPORT_SYMBOL_GPL(ata_host_activate);
6777 EXPORT_SYMBOL_GPL(ata_host_detach);
6778 EXPORT_SYMBOL_GPL(ata_sg_init);
6779 EXPORT_SYMBOL_GPL(ata_sg_init_one);
6780 EXPORT_SYMBOL_GPL(ata_hsm_move);
6781 EXPORT_SYMBOL_GPL(ata_qc_complete);
6782 EXPORT_SYMBOL_GPL(ata_qc_complete_multiple);
6783 EXPORT_SYMBOL_GPL(ata_qc_issue_prot);
6784 EXPORT_SYMBOL_GPL(ata_tf_load);
6785 EXPORT_SYMBOL_GPL(ata_tf_read);
6786 EXPORT_SYMBOL_GPL(ata_noop_dev_select);
6787 EXPORT_SYMBOL_GPL(ata_std_dev_select);
6788 EXPORT_SYMBOL_GPL(sata_print_link_status);
6789 EXPORT_SYMBOL_GPL(ata_tf_to_fis);
6790 EXPORT_SYMBOL_GPL(ata_tf_from_fis);
6791 EXPORT_SYMBOL_GPL(ata_check_status);
6792 EXPORT_SYMBOL_GPL(ata_altstatus);
6793 EXPORT_SYMBOL_GPL(ata_exec_command);
6794 EXPORT_SYMBOL_GPL(ata_port_start);
6795 EXPORT_SYMBOL_GPL(ata_interrupt);
6796 EXPORT_SYMBOL_GPL(ata_do_set_mode);
6797 EXPORT_SYMBOL_GPL(ata_data_xfer);
6798 EXPORT_SYMBOL_GPL(ata_data_xfer_noirq);
6799 EXPORT_SYMBOL_GPL(ata_qc_prep);
6800 EXPORT_SYMBOL_GPL(ata_noop_qc_prep);
6801 EXPORT_SYMBOL_GPL(ata_bmdma_setup);
6802 EXPORT_SYMBOL_GPL(ata_bmdma_start);
6803 EXPORT_SYMBOL_GPL(ata_bmdma_irq_clear);
6804 EXPORT_SYMBOL_GPL(ata_bmdma_status);
6805 EXPORT_SYMBOL_GPL(ata_bmdma_stop);
6806 EXPORT_SYMBOL_GPL(ata_bmdma_freeze);
6807 EXPORT_SYMBOL_GPL(ata_bmdma_thaw);
6808 EXPORT_SYMBOL_GPL(ata_bmdma_drive_eh);
6809 EXPORT_SYMBOL_GPL(ata_bmdma_error_handler);
6810 EXPORT_SYMBOL_GPL(ata_bmdma_post_internal_cmd);
6811 EXPORT_SYMBOL_GPL(ata_port_probe);
6812 EXPORT_SYMBOL_GPL(ata_dev_disable);
6813 EXPORT_SYMBOL_GPL(sata_set_spd);
6814 EXPORT_SYMBOL_GPL(sata_phy_debounce);
6815 EXPORT_SYMBOL_GPL(sata_phy_resume);
6816 EXPORT_SYMBOL_GPL(sata_phy_reset);
6817 EXPORT_SYMBOL_GPL(__sata_phy_reset);
6818 EXPORT_SYMBOL_GPL(ata_bus_reset);
6819 EXPORT_SYMBOL_GPL(ata_std_prereset);
6820 EXPORT_SYMBOL_GPL(ata_std_softreset);
6821 EXPORT_SYMBOL_GPL(sata_port_hardreset);
6822 EXPORT_SYMBOL_GPL(sata_std_hardreset);
6823 EXPORT_SYMBOL_GPL(ata_std_postreset);
6824 EXPORT_SYMBOL_GPL(ata_dev_classify);
6825 EXPORT_SYMBOL_GPL(ata_dev_pair);
6826 EXPORT_SYMBOL_GPL(ata_port_disable);
6827 EXPORT_SYMBOL_GPL(ata_ratelimit);
6828 EXPORT_SYMBOL_GPL(ata_wait_register);
6829 EXPORT_SYMBOL_GPL(ata_busy_sleep);
6830 EXPORT_SYMBOL_GPL(ata_wait_ready);
6831 EXPORT_SYMBOL_GPL(ata_port_queue_task);
6832 EXPORT_SYMBOL_GPL(ata_scsi_ioctl);
6833 EXPORT_SYMBOL_GPL(ata_scsi_queuecmd);
6834 EXPORT_SYMBOL_GPL(ata_scsi_slave_config);
6835 EXPORT_SYMBOL_GPL(ata_scsi_slave_destroy);
6836 EXPORT_SYMBOL_GPL(ata_scsi_change_queue_depth);
6837 EXPORT_SYMBOL_GPL(ata_host_intr);
6838 EXPORT_SYMBOL_GPL(sata_scr_valid);
6839 EXPORT_SYMBOL_GPL(sata_scr_read);
6840 EXPORT_SYMBOL_GPL(sata_scr_write);
6841 EXPORT_SYMBOL_GPL(sata_scr_write_flush);
6842 EXPORT_SYMBOL_GPL(ata_port_online);
6843 EXPORT_SYMBOL_GPL(ata_port_offline);
6845 EXPORT_SYMBOL_GPL(ata_host_suspend);
6846 EXPORT_SYMBOL_GPL(ata_host_resume);
6847 #endif /* CONFIG_PM */
6848 EXPORT_SYMBOL_GPL(ata_id_string);
6849 EXPORT_SYMBOL_GPL(ata_id_c_string);
6850 EXPORT_SYMBOL_GPL(ata_id_to_dma_mode);
6851 EXPORT_SYMBOL_GPL(ata_device_blacklisted);
6852 EXPORT_SYMBOL_GPL(ata_scsi_simulate);
6854 EXPORT_SYMBOL_GPL(ata_pio_need_iordy);
6855 EXPORT_SYMBOL_GPL(ata_timing_compute);
6856 EXPORT_SYMBOL_GPL(ata_timing_merge);
6859 EXPORT_SYMBOL_GPL(pci_test_config_bits);
6860 EXPORT_SYMBOL_GPL(ata_pci_init_native_host);
6861 EXPORT_SYMBOL_GPL(ata_pci_init_bmdma);
6862 EXPORT_SYMBOL_GPL(ata_pci_prepare_native_host);
6863 EXPORT_SYMBOL_GPL(ata_pci_init_one);
6864 EXPORT_SYMBOL_GPL(ata_pci_remove_one);
6866 EXPORT_SYMBOL_GPL(ata_pci_device_do_suspend);
6867 EXPORT_SYMBOL_GPL(ata_pci_device_do_resume);
6868 EXPORT_SYMBOL_GPL(ata_pci_device_suspend);
6869 EXPORT_SYMBOL_GPL(ata_pci_device_resume);
6870 #endif /* CONFIG_PM */
6871 EXPORT_SYMBOL_GPL(ata_pci_default_filter);
6872 EXPORT_SYMBOL_GPL(ata_pci_clear_simplex);
6873 #endif /* CONFIG_PCI */
6875 EXPORT_SYMBOL_GPL(ata_eng_timeout);
6876 EXPORT_SYMBOL_GPL(ata_port_schedule_eh);
6877 EXPORT_SYMBOL_GPL(ata_port_abort);
6878 EXPORT_SYMBOL_GPL(ata_port_freeze);
6879 EXPORT_SYMBOL_GPL(ata_eh_freeze_port);
6880 EXPORT_SYMBOL_GPL(ata_eh_thaw_port);
6881 EXPORT_SYMBOL_GPL(ata_eh_qc_complete);
6882 EXPORT_SYMBOL_GPL(ata_eh_qc_retry);
6883 EXPORT_SYMBOL_GPL(ata_do_eh);
6884 EXPORT_SYMBOL_GPL(ata_irq_on);
6885 EXPORT_SYMBOL_GPL(ata_dummy_irq_on);
6886 EXPORT_SYMBOL_GPL(ata_irq_ack);
6887 EXPORT_SYMBOL_GPL(ata_dummy_irq_ack);
6888 EXPORT_SYMBOL_GPL(ata_dev_try_classify);
6890 EXPORT_SYMBOL_GPL(ata_cable_40wire);
6891 EXPORT_SYMBOL_GPL(ata_cable_80wire);
6892 EXPORT_SYMBOL_GPL(ata_cable_unknown);
6893 EXPORT_SYMBOL_GPL(ata_cable_sata);