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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Jeff Garzikaf36d7f2005-08-28 20:18:39 -04002 * libata-core.c - helper library for ATA
3 *
4 * Maintained by: Jeff Garzik <jgarzik@pobox.com>
5 * Please ALWAYS copy linux-ide@vger.kernel.org
6 * on emails.
7 *
8 * Copyright 2003-2004 Red Hat, Inc. All rights reserved.
9 * Copyright 2003-2004 Jeff Garzik
10 *
11 *
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)
15 * any later version.
16 *
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.
21 *
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.
25 *
26 *
27 * libata documentation is available via 'make {ps|pdf}docs',
28 * as Documentation/DocBook/libata.*
29 *
30 * Hardware documentation available from http://www.t13.org/ and
31 * http://www.sata-io.org/
32 *
Linus Torvalds1da177e2005-04-16 15:20:36 -070033 */
34
Linus Torvalds1da177e2005-04-16 15:20:36 -070035#include <linux/kernel.h>
36#include <linux/module.h>
37#include <linux/pci.h>
38#include <linux/init.h>
39#include <linux/list.h>
40#include <linux/mm.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>
Jeff Garzik67846b32005-10-05 02:58:32 -040050#include <linux/jiffies.h>
David Hardeman378f0582005-09-17 17:55:31 +100051#include <linux/scatterlist.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070052#include <scsi/scsi.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070053#include "scsi_priv.h"
Jeff Garzik193515d2005-11-07 00:59:37 -050054#include <scsi/scsi_cmnd.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070055#include <scsi/scsi_host.h>
56#include <linux/libata.h>
57#include <asm/io.h>
58#include <asm/semaphore.h>
59#include <asm/byteorder.h>
60
61#include "libata.h"
62
Tejun Heod7bb4cc2006-05-31 18:27:46 +090063/* debounce timing parameters in msecs { interval, duration, timeout } */
64const unsigned long sata_deb_timing_boot[] = { 5, 100, 2000 };
65const unsigned long sata_deb_timing_eh[] = { 25, 500, 2000 };
66const unsigned long sata_deb_timing_before_fsrst[] = { 100, 2000, 5000 };
67
Tejun Heo3373efd2006-05-15 20:57:53 +090068static unsigned int ata_dev_init_params(struct ata_device *dev,
69 u16 heads, u16 sectors);
70static unsigned int ata_dev_set_xfermode(struct ata_device *dev);
71static void ata_dev_xfermask(struct ata_device *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -070072
73static unsigned int ata_unique_id = 1;
74static struct workqueue_struct *ata_wq;
75
Tejun Heo453b07a2006-05-31 18:27:42 +090076struct workqueue_struct *ata_aux_wq;
77
Jeff Garzik418dc1f2006-03-11 20:50:08 -050078int atapi_enabled = 1;
Jeff Garzik1623c812005-08-30 03:37:42 -040079module_param(atapi_enabled, int, 0444);
80MODULE_PARM_DESC(atapi_enabled, "Enable discovery of ATAPI devices (0=off, 1=on)");
81
Albert Lee95de7192006-04-04 10:57:18 +080082int atapi_dmadir = 0;
83module_param(atapi_dmadir, int, 0444);
84MODULE_PARM_DESC(atapi_dmadir, "Enable ATAPI DMADIR bridge support (0=off, 1=on)");
85
Jeff Garzikc3c013a2006-02-27 22:31:19 -050086int libata_fua = 0;
87module_param_named(fua, libata_fua, int, 0444);
88MODULE_PARM_DESC(fua, "FUA support (0=off, 1=on)");
89
Andrew Mortona8601e52006-06-25 01:36:52 -070090static int ata_probe_timeout = ATA_TMOUT_INTERNAL / HZ;
91module_param(ata_probe_timeout, int, 0444);
92MODULE_PARM_DESC(ata_probe_timeout, "Set ATA probing timeout (seconds)");
93
Linus Torvalds1da177e2005-04-16 15:20:36 -070094MODULE_AUTHOR("Jeff Garzik");
95MODULE_DESCRIPTION("Library module for ATA devices");
96MODULE_LICENSE("GPL");
97MODULE_VERSION(DRV_VERSION);
98
Edward Falk0baab862005-06-02 18:17:13 -040099
100/**
Linus Torvalds1da177e2005-04-16 15:20:36 -0700101 * ata_tf_to_fis - Convert ATA taskfile to SATA FIS structure
102 * @tf: Taskfile to convert
103 * @fis: Buffer into which data will output
104 * @pmp: Port multiplier port
105 *
106 * Converts a standard ATA taskfile to a Serial ATA
107 * FIS structure (Register - Host to Device).
108 *
109 * LOCKING:
110 * Inherited from caller.
111 */
112
Jeff Garzik057ace52005-10-22 14:27:05 -0400113void ata_tf_to_fis(const struct ata_taskfile *tf, u8 *fis, u8 pmp)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700114{
115 fis[0] = 0x27; /* Register - Host to Device FIS */
116 fis[1] = (pmp & 0xf) | (1 << 7); /* Port multiplier number,
117 bit 7 indicates Command FIS */
118 fis[2] = tf->command;
119 fis[3] = tf->feature;
120
121 fis[4] = tf->lbal;
122 fis[5] = tf->lbam;
123 fis[6] = tf->lbah;
124 fis[7] = tf->device;
125
126 fis[8] = tf->hob_lbal;
127 fis[9] = tf->hob_lbam;
128 fis[10] = tf->hob_lbah;
129 fis[11] = tf->hob_feature;
130
131 fis[12] = tf->nsect;
132 fis[13] = tf->hob_nsect;
133 fis[14] = 0;
134 fis[15] = tf->ctl;
135
136 fis[16] = 0;
137 fis[17] = 0;
138 fis[18] = 0;
139 fis[19] = 0;
140}
141
142/**
143 * ata_tf_from_fis - Convert SATA FIS to ATA taskfile
144 * @fis: Buffer from which data will be input
145 * @tf: Taskfile to output
146 *
Mark Lorde12a1be2005-11-12 18:55:45 -0500147 * Converts a serial ATA FIS structure to a standard ATA taskfile.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700148 *
149 * LOCKING:
150 * Inherited from caller.
151 */
152
Jeff Garzik057ace52005-10-22 14:27:05 -0400153void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700154{
155 tf->command = fis[2]; /* status */
156 tf->feature = fis[3]; /* error */
157
158 tf->lbal = fis[4];
159 tf->lbam = fis[5];
160 tf->lbah = fis[6];
161 tf->device = fis[7];
162
163 tf->hob_lbal = fis[8];
164 tf->hob_lbam = fis[9];
165 tf->hob_lbah = fis[10];
166
167 tf->nsect = fis[12];
168 tf->hob_nsect = fis[13];
169}
170
Albert Lee8cbd6df2005-10-12 15:06:27 +0800171static const u8 ata_rw_cmds[] = {
172 /* pio multi */
173 ATA_CMD_READ_MULTI,
174 ATA_CMD_WRITE_MULTI,
175 ATA_CMD_READ_MULTI_EXT,
176 ATA_CMD_WRITE_MULTI_EXT,
Tejun Heo9a3dccc2006-01-06 09:56:18 +0100177 0,
178 0,
179 0,
180 ATA_CMD_WRITE_MULTI_FUA_EXT,
Albert Lee8cbd6df2005-10-12 15:06:27 +0800181 /* pio */
182 ATA_CMD_PIO_READ,
183 ATA_CMD_PIO_WRITE,
184 ATA_CMD_PIO_READ_EXT,
185 ATA_CMD_PIO_WRITE_EXT,
Tejun Heo9a3dccc2006-01-06 09:56:18 +0100186 0,
187 0,
188 0,
189 0,
Albert Lee8cbd6df2005-10-12 15:06:27 +0800190 /* dma */
191 ATA_CMD_READ,
192 ATA_CMD_WRITE,
193 ATA_CMD_READ_EXT,
Tejun Heo9a3dccc2006-01-06 09:56:18 +0100194 ATA_CMD_WRITE_EXT,
195 0,
196 0,
197 0,
198 ATA_CMD_WRITE_FUA_EXT
Albert Lee8cbd6df2005-10-12 15:06:27 +0800199};
Linus Torvalds1da177e2005-04-16 15:20:36 -0700200
201/**
Albert Lee8cbd6df2005-10-12 15:06:27 +0800202 * ata_rwcmd_protocol - set taskfile r/w commands and protocol
203 * @qc: command to examine and configure
Linus Torvalds1da177e2005-04-16 15:20:36 -0700204 *
Jeff Garzik2e9edbf2006-03-24 09:56:57 -0500205 * Examine the device configuration and tf->flags to calculate
Albert Lee8cbd6df2005-10-12 15:06:27 +0800206 * the proper read/write commands and protocol to use.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700207 *
208 * LOCKING:
209 * caller.
210 */
Tejun Heo9a3dccc2006-01-06 09:56:18 +0100211int ata_rwcmd_protocol(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700212{
Albert Lee8cbd6df2005-10-12 15:06:27 +0800213 struct ata_taskfile *tf = &qc->tf;
214 struct ata_device *dev = qc->dev;
Tejun Heo9a3dccc2006-01-06 09:56:18 +0100215 u8 cmd;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700216
Tejun Heo9a3dccc2006-01-06 09:56:18 +0100217 int index, fua, lba48, write;
Jeff Garzik2e9edbf2006-03-24 09:56:57 -0500218
Tejun Heo9a3dccc2006-01-06 09:56:18 +0100219 fua = (tf->flags & ATA_TFLAG_FUA) ? 4 : 0;
Albert Lee8cbd6df2005-10-12 15:06:27 +0800220 lba48 = (tf->flags & ATA_TFLAG_LBA48) ? 2 : 0;
221 write = (tf->flags & ATA_TFLAG_WRITE) ? 1 : 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700222
Albert Lee8cbd6df2005-10-12 15:06:27 +0800223 if (dev->flags & ATA_DFLAG_PIO) {
224 tf->protocol = ATA_PROT_PIO;
Tejun Heo9a3dccc2006-01-06 09:56:18 +0100225 index = dev->multi_count ? 0 : 8;
Alan Cox8d238e02006-01-17 20:50:31 +0000226 } else if (lba48 && (qc->ap->flags & ATA_FLAG_PIO_LBA48)) {
227 /* Unable to use DMA due to host limitation */
228 tf->protocol = ATA_PROT_PIO;
Albert Lee0565c262006-02-13 18:55:25 +0800229 index = dev->multi_count ? 0 : 8;
Albert Lee8cbd6df2005-10-12 15:06:27 +0800230 } else {
231 tf->protocol = ATA_PROT_DMA;
Tejun Heo9a3dccc2006-01-06 09:56:18 +0100232 index = 16;
Albert Lee8cbd6df2005-10-12 15:06:27 +0800233 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700234
Tejun Heo9a3dccc2006-01-06 09:56:18 +0100235 cmd = ata_rw_cmds[index + fua + lba48 + write];
236 if (cmd) {
237 tf->command = cmd;
238 return 0;
239 }
240 return -1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700241}
242
Tejun Heocb95d562006-03-06 04:31:56 +0900243/**
244 * ata_pack_xfermask - Pack pio, mwdma and udma masks into xfer_mask
245 * @pio_mask: pio_mask
246 * @mwdma_mask: mwdma_mask
247 * @udma_mask: udma_mask
248 *
249 * Pack @pio_mask, @mwdma_mask and @udma_mask into a single
250 * unsigned int xfer_mask.
251 *
252 * LOCKING:
253 * None.
254 *
255 * RETURNS:
256 * Packed xfer_mask.
257 */
258static unsigned int ata_pack_xfermask(unsigned int pio_mask,
259 unsigned int mwdma_mask,
260 unsigned int udma_mask)
261{
262 return ((pio_mask << ATA_SHIFT_PIO) & ATA_MASK_PIO) |
263 ((mwdma_mask << ATA_SHIFT_MWDMA) & ATA_MASK_MWDMA) |
264 ((udma_mask << ATA_SHIFT_UDMA) & ATA_MASK_UDMA);
265}
266
Tejun Heoc0489e42006-03-24 14:07:49 +0900267/**
268 * ata_unpack_xfermask - Unpack xfer_mask into pio, mwdma and udma masks
269 * @xfer_mask: xfer_mask to unpack
270 * @pio_mask: resulting pio_mask
271 * @mwdma_mask: resulting mwdma_mask
272 * @udma_mask: resulting udma_mask
273 *
274 * Unpack @xfer_mask into @pio_mask, @mwdma_mask and @udma_mask.
275 * Any NULL distination masks will be ignored.
276 */
277static void ata_unpack_xfermask(unsigned int xfer_mask,
278 unsigned int *pio_mask,
279 unsigned int *mwdma_mask,
280 unsigned int *udma_mask)
281{
282 if (pio_mask)
283 *pio_mask = (xfer_mask & ATA_MASK_PIO) >> ATA_SHIFT_PIO;
284 if (mwdma_mask)
285 *mwdma_mask = (xfer_mask & ATA_MASK_MWDMA) >> ATA_SHIFT_MWDMA;
286 if (udma_mask)
287 *udma_mask = (xfer_mask & ATA_MASK_UDMA) >> ATA_SHIFT_UDMA;
288}
289
Tejun Heocb95d562006-03-06 04:31:56 +0900290static const struct ata_xfer_ent {
Tejun Heobe9a50c2006-03-31 22:48:52 +0900291 int shift, bits;
Tejun Heocb95d562006-03-06 04:31:56 +0900292 u8 base;
293} ata_xfer_tbl[] = {
294 { ATA_SHIFT_PIO, ATA_BITS_PIO, XFER_PIO_0 },
295 { ATA_SHIFT_MWDMA, ATA_BITS_MWDMA, XFER_MW_DMA_0 },
296 { ATA_SHIFT_UDMA, ATA_BITS_UDMA, XFER_UDMA_0 },
297 { -1, },
298};
299
300/**
301 * ata_xfer_mask2mode - Find matching XFER_* for the given xfer_mask
302 * @xfer_mask: xfer_mask of interest
303 *
304 * Return matching XFER_* value for @xfer_mask. Only the highest
305 * bit of @xfer_mask is considered.
306 *
307 * LOCKING:
308 * None.
309 *
310 * RETURNS:
311 * Matching XFER_* value, 0 if no match found.
312 */
313static u8 ata_xfer_mask2mode(unsigned int xfer_mask)
314{
315 int highbit = fls(xfer_mask) - 1;
316 const struct ata_xfer_ent *ent;
317
318 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
319 if (highbit >= ent->shift && highbit < ent->shift + ent->bits)
320 return ent->base + highbit - ent->shift;
321 return 0;
322}
323
324/**
325 * ata_xfer_mode2mask - Find matching xfer_mask for XFER_*
326 * @xfer_mode: XFER_* of interest
327 *
328 * Return matching xfer_mask for @xfer_mode.
329 *
330 * LOCKING:
331 * None.
332 *
333 * RETURNS:
334 * Matching xfer_mask, 0 if no match found.
335 */
336static unsigned int ata_xfer_mode2mask(u8 xfer_mode)
337{
338 const struct ata_xfer_ent *ent;
339
340 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
341 if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits)
342 return 1 << (ent->shift + xfer_mode - ent->base);
343 return 0;
344}
345
346/**
347 * ata_xfer_mode2shift - Find matching xfer_shift for XFER_*
348 * @xfer_mode: XFER_* of interest
349 *
350 * Return matching xfer_shift for @xfer_mode.
351 *
352 * LOCKING:
353 * None.
354 *
355 * RETURNS:
356 * Matching xfer_shift, -1 if no match found.
357 */
358static int ata_xfer_mode2shift(unsigned int xfer_mode)
359{
360 const struct ata_xfer_ent *ent;
361
362 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
363 if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits)
364 return ent->shift;
365 return -1;
366}
367
Linus Torvalds1da177e2005-04-16 15:20:36 -0700368/**
Tejun Heo1da7b0d2006-03-06 04:31:56 +0900369 * ata_mode_string - convert xfer_mask to string
370 * @xfer_mask: mask of bits supported; only highest bit counts.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700371 *
372 * Determine string which represents the highest speed
Tejun Heo1da7b0d2006-03-06 04:31:56 +0900373 * (highest bit in @modemask).
Linus Torvalds1da177e2005-04-16 15:20:36 -0700374 *
375 * LOCKING:
376 * None.
377 *
378 * RETURNS:
379 * Constant C string representing highest speed listed in
Tejun Heo1da7b0d2006-03-06 04:31:56 +0900380 * @mode_mask, or the constant C string "<n/a>".
Linus Torvalds1da177e2005-04-16 15:20:36 -0700381 */
Tejun Heo1da7b0d2006-03-06 04:31:56 +0900382static const char *ata_mode_string(unsigned int xfer_mask)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700383{
Tejun Heo75f554b2006-03-06 04:31:57 +0900384 static const char * const xfer_mode_str[] = {
385 "PIO0",
386 "PIO1",
387 "PIO2",
388 "PIO3",
389 "PIO4",
390 "MWDMA0",
391 "MWDMA1",
392 "MWDMA2",
393 "UDMA/16",
394 "UDMA/25",
395 "UDMA/33",
396 "UDMA/44",
397 "UDMA/66",
398 "UDMA/100",
399 "UDMA/133",
400 "UDMA7",
401 };
Tejun Heo1da7b0d2006-03-06 04:31:56 +0900402 int highbit;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700403
Tejun Heo1da7b0d2006-03-06 04:31:56 +0900404 highbit = fls(xfer_mask) - 1;
405 if (highbit >= 0 && highbit < ARRAY_SIZE(xfer_mode_str))
406 return xfer_mode_str[highbit];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700407 return "<n/a>";
Linus Torvalds1da177e2005-04-16 15:20:36 -0700408}
409
Tejun Heo4c360c82006-04-01 01:38:17 +0900410static const char *sata_spd_string(unsigned int spd)
411{
412 static const char * const spd_str[] = {
413 "1.5 Gbps",
414 "3.0 Gbps",
415 };
416
417 if (spd == 0 || (spd - 1) >= ARRAY_SIZE(spd_str))
418 return "<unknown>";
419 return spd_str[spd - 1];
420}
421
Tejun Heo3373efd2006-05-15 20:57:53 +0900422void ata_dev_disable(struct ata_device *dev)
Tejun Heo0b8efb02006-03-24 15:25:31 +0900423{
Borislav Petkov0dd4b212006-06-23 02:29:08 -0400424 if (ata_dev_enabled(dev) && ata_msg_drv(dev->ap)) {
Tejun Heof15a1da2006-05-15 20:57:56 +0900425 ata_dev_printk(dev, KERN_WARNING, "disabled\n");
Tejun Heo0b8efb02006-03-24 15:25:31 +0900426 dev->class++;
427 }
428}
429
Linus Torvalds1da177e2005-04-16 15:20:36 -0700430/**
431 * ata_pio_devchk - PATA device presence detection
432 * @ap: ATA channel to examine
433 * @device: Device to examine (starting at zero)
434 *
435 * This technique was originally described in
436 * Hale Landis's ATADRVR (www.ata-atapi.com), and
437 * later found its way into the ATA/ATAPI spec.
438 *
439 * Write a pattern to the ATA shadow registers,
440 * and if a device is present, it will respond by
441 * correctly storing and echoing back the
442 * ATA shadow register contents.
443 *
444 * LOCKING:
445 * caller.
446 */
447
448static unsigned int ata_pio_devchk(struct ata_port *ap,
449 unsigned int device)
450{
451 struct ata_ioports *ioaddr = &ap->ioaddr;
452 u8 nsect, lbal;
453
454 ap->ops->dev_select(ap, device);
455
456 outb(0x55, ioaddr->nsect_addr);
457 outb(0xaa, ioaddr->lbal_addr);
458
459 outb(0xaa, ioaddr->nsect_addr);
460 outb(0x55, ioaddr->lbal_addr);
461
462 outb(0x55, ioaddr->nsect_addr);
463 outb(0xaa, ioaddr->lbal_addr);
464
465 nsect = inb(ioaddr->nsect_addr);
466 lbal = inb(ioaddr->lbal_addr);
467
468 if ((nsect == 0x55) && (lbal == 0xaa))
469 return 1; /* we found a device */
470
471 return 0; /* nothing found */
472}
473
474/**
475 * ata_mmio_devchk - PATA device presence detection
476 * @ap: ATA channel to examine
477 * @device: Device to examine (starting at zero)
478 *
479 * This technique was originally described in
480 * Hale Landis's ATADRVR (www.ata-atapi.com), and
481 * later found its way into the ATA/ATAPI spec.
482 *
483 * Write a pattern to the ATA shadow registers,
484 * and if a device is present, it will respond by
485 * correctly storing and echoing back the
486 * ATA shadow register contents.
487 *
488 * LOCKING:
489 * caller.
490 */
491
492static unsigned int ata_mmio_devchk(struct ata_port *ap,
493 unsigned int device)
494{
495 struct ata_ioports *ioaddr = &ap->ioaddr;
496 u8 nsect, lbal;
497
498 ap->ops->dev_select(ap, device);
499
500 writeb(0x55, (void __iomem *) ioaddr->nsect_addr);
501 writeb(0xaa, (void __iomem *) ioaddr->lbal_addr);
502
503 writeb(0xaa, (void __iomem *) ioaddr->nsect_addr);
504 writeb(0x55, (void __iomem *) ioaddr->lbal_addr);
505
506 writeb(0x55, (void __iomem *) ioaddr->nsect_addr);
507 writeb(0xaa, (void __iomem *) ioaddr->lbal_addr);
508
509 nsect = readb((void __iomem *) ioaddr->nsect_addr);
510 lbal = readb((void __iomem *) ioaddr->lbal_addr);
511
512 if ((nsect == 0x55) && (lbal == 0xaa))
513 return 1; /* we found a device */
514
515 return 0; /* nothing found */
516}
517
518/**
519 * ata_devchk - PATA device presence detection
520 * @ap: ATA channel to examine
521 * @device: Device to examine (starting at zero)
522 *
523 * Dispatch ATA device presence detection, depending
524 * on whether we are using PIO or MMIO to talk to the
525 * ATA shadow registers.
526 *
527 * LOCKING:
528 * caller.
529 */
530
531static unsigned int ata_devchk(struct ata_port *ap,
532 unsigned int device)
533{
534 if (ap->flags & ATA_FLAG_MMIO)
535 return ata_mmio_devchk(ap, device);
536 return ata_pio_devchk(ap, device);
537}
538
539/**
540 * ata_dev_classify - determine device type based on ATA-spec signature
541 * @tf: ATA taskfile register set for device to be identified
542 *
543 * Determine from taskfile register contents whether a device is
544 * ATA or ATAPI, as per "Signature and persistence" section
545 * of ATA/PI spec (volume 1, sect 5.14).
546 *
547 * LOCKING:
548 * None.
549 *
550 * RETURNS:
551 * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, or %ATA_DEV_UNKNOWN
552 * the event of failure.
553 */
554
Jeff Garzik057ace52005-10-22 14:27:05 -0400555unsigned int ata_dev_classify(const struct ata_taskfile *tf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700556{
557 /* Apple's open source Darwin code hints that some devices only
558 * put a proper signature into the LBA mid/high registers,
559 * So, we only check those. It's sufficient for uniqueness.
560 */
561
562 if (((tf->lbam == 0) && (tf->lbah == 0)) ||
563 ((tf->lbam == 0x3c) && (tf->lbah == 0xc3))) {
564 DPRINTK("found ATA device by sig\n");
565 return ATA_DEV_ATA;
566 }
567
568 if (((tf->lbam == 0x14) && (tf->lbah == 0xeb)) ||
569 ((tf->lbam == 0x69) && (tf->lbah == 0x96))) {
570 DPRINTK("found ATAPI device by sig\n");
571 return ATA_DEV_ATAPI;
572 }
573
574 DPRINTK("unknown device\n");
575 return ATA_DEV_UNKNOWN;
576}
577
578/**
579 * ata_dev_try_classify - Parse returned ATA device signature
580 * @ap: ATA channel to examine
581 * @device: Device to examine (starting at zero)
Tejun Heob4dc7622006-01-24 17:05:22 +0900582 * @r_err: Value of error register on completion
Linus Torvalds1da177e2005-04-16 15:20:36 -0700583 *
584 * After an event -- SRST, E.D.D., or SATA COMRESET -- occurs,
585 * an ATA/ATAPI-defined set of values is placed in the ATA
586 * shadow registers, indicating the results of device detection
587 * and diagnostics.
588 *
589 * Select the ATA device, and read the values from the ATA shadow
590 * registers. Then parse according to the Error register value,
591 * and the spec-defined values examined by ata_dev_classify().
592 *
593 * LOCKING:
594 * caller.
Tejun Heob4dc7622006-01-24 17:05:22 +0900595 *
596 * RETURNS:
597 * Device type - %ATA_DEV_ATA, %ATA_DEV_ATAPI or %ATA_DEV_NONE.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700598 */
599
Tejun Heob4dc7622006-01-24 17:05:22 +0900600static unsigned int
601ata_dev_try_classify(struct ata_port *ap, unsigned int device, u8 *r_err)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700602{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700603 struct ata_taskfile tf;
604 unsigned int class;
605 u8 err;
606
607 ap->ops->dev_select(ap, device);
608
609 memset(&tf, 0, sizeof(tf));
610
Linus Torvalds1da177e2005-04-16 15:20:36 -0700611 ap->ops->tf_read(ap, &tf);
Jeff Garzik0169e282005-10-29 21:25:10 -0400612 err = tf.feature;
Tejun Heob4dc7622006-01-24 17:05:22 +0900613 if (r_err)
614 *r_err = err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700615
616 /* see if device passed diags */
617 if (err == 1)
618 /* do nothing */ ;
619 else if ((device == 0) && (err == 0x81))
620 /* do nothing */ ;
621 else
Tejun Heob4dc7622006-01-24 17:05:22 +0900622 return ATA_DEV_NONE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700623
Tejun Heob4dc7622006-01-24 17:05:22 +0900624 /* determine if device is ATA or ATAPI */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700625 class = ata_dev_classify(&tf);
Tejun Heob4dc7622006-01-24 17:05:22 +0900626
Linus Torvalds1da177e2005-04-16 15:20:36 -0700627 if (class == ATA_DEV_UNKNOWN)
Tejun Heob4dc7622006-01-24 17:05:22 +0900628 return ATA_DEV_NONE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700629 if ((class == ATA_DEV_ATA) && (ata_chk_status(ap) == 0))
Tejun Heob4dc7622006-01-24 17:05:22 +0900630 return ATA_DEV_NONE;
631 return class;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700632}
633
634/**
Tejun Heo6a62a042006-02-13 10:02:46 +0900635 * ata_id_string - Convert IDENTIFY DEVICE page into string
Linus Torvalds1da177e2005-04-16 15:20:36 -0700636 * @id: IDENTIFY DEVICE results we will examine
637 * @s: string into which data is output
638 * @ofs: offset into identify device page
639 * @len: length of string to return. must be an even number.
640 *
641 * The strings in the IDENTIFY DEVICE page are broken up into
642 * 16-bit chunks. Run through the string, and output each
643 * 8-bit chunk linearly, regardless of platform.
644 *
645 * LOCKING:
646 * caller.
647 */
648
Tejun Heo6a62a042006-02-13 10:02:46 +0900649void ata_id_string(const u16 *id, unsigned char *s,
650 unsigned int ofs, unsigned int len)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700651{
652 unsigned int c;
653
654 while (len > 0) {
655 c = id[ofs] >> 8;
656 *s = c;
657 s++;
658
659 c = id[ofs] & 0xff;
660 *s = c;
661 s++;
662
663 ofs++;
664 len -= 2;
665 }
666}
667
Tejun Heo0e949ff2006-02-12 22:47:04 +0900668/**
Tejun Heo6a62a042006-02-13 10:02:46 +0900669 * ata_id_c_string - Convert IDENTIFY DEVICE page into C string
Tejun Heo0e949ff2006-02-12 22:47:04 +0900670 * @id: IDENTIFY DEVICE results we will examine
671 * @s: string into which data is output
672 * @ofs: offset into identify device page
673 * @len: length of string to return. must be an odd number.
674 *
Tejun Heo6a62a042006-02-13 10:02:46 +0900675 * This function is identical to ata_id_string except that it
Tejun Heo0e949ff2006-02-12 22:47:04 +0900676 * trims trailing spaces and terminates the resulting string with
677 * null. @len must be actual maximum length (even number) + 1.
678 *
679 * LOCKING:
680 * caller.
681 */
Tejun Heo6a62a042006-02-13 10:02:46 +0900682void ata_id_c_string(const u16 *id, unsigned char *s,
683 unsigned int ofs, unsigned int len)
Tejun Heo0e949ff2006-02-12 22:47:04 +0900684{
685 unsigned char *p;
686
687 WARN_ON(!(len & 1));
688
Tejun Heo6a62a042006-02-13 10:02:46 +0900689 ata_id_string(id, s, ofs, len - 1);
Tejun Heo0e949ff2006-02-12 22:47:04 +0900690
691 p = s + strnlen(s, len - 1);
692 while (p > s && p[-1] == ' ')
693 p--;
694 *p = '\0';
695}
Edward Falk0baab862005-06-02 18:17:13 -0400696
Tejun Heo29407402006-02-12 22:47:04 +0900697static u64 ata_id_n_sectors(const u16 *id)
698{
699 if (ata_id_has_lba(id)) {
700 if (ata_id_has_lba48(id))
701 return ata_id_u64(id, 100);
702 else
703 return ata_id_u32(id, 60);
704 } else {
705 if (ata_id_current_chs_valid(id))
706 return ata_id_u32(id, 57);
707 else
708 return id[1] * id[3] * id[6];
709 }
710}
711
Edward Falk0baab862005-06-02 18:17:13 -0400712/**
713 * ata_noop_dev_select - Select device 0/1 on ATA bus
714 * @ap: ATA channel to manipulate
715 * @device: ATA device (numbered from zero) to select
716 *
717 * This function performs no actual function.
718 *
719 * May be used as the dev_select() entry in ata_port_operations.
720 *
721 * LOCKING:
722 * caller.
723 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700724void ata_noop_dev_select (struct ata_port *ap, unsigned int device)
725{
726}
727
Edward Falk0baab862005-06-02 18:17:13 -0400728
Linus Torvalds1da177e2005-04-16 15:20:36 -0700729/**
730 * ata_std_dev_select - Select device 0/1 on ATA bus
731 * @ap: ATA channel to manipulate
732 * @device: ATA device (numbered from zero) to select
733 *
734 * Use the method defined in the ATA specification to
735 * make either device 0, or device 1, active on the
Edward Falk0baab862005-06-02 18:17:13 -0400736 * ATA channel. Works with both PIO and MMIO.
737 *
738 * May be used as the dev_select() entry in ata_port_operations.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700739 *
740 * LOCKING:
741 * caller.
742 */
743
744void ata_std_dev_select (struct ata_port *ap, unsigned int device)
745{
746 u8 tmp;
747
748 if (device == 0)
749 tmp = ATA_DEVICE_OBS;
750 else
751 tmp = ATA_DEVICE_OBS | ATA_DEV1;
752
753 if (ap->flags & ATA_FLAG_MMIO) {
754 writeb(tmp, (void __iomem *) ap->ioaddr.device_addr);
755 } else {
756 outb(tmp, ap->ioaddr.device_addr);
757 }
758 ata_pause(ap); /* needed; also flushes, for mmio */
759}
760
761/**
762 * ata_dev_select - Select device 0/1 on ATA bus
763 * @ap: ATA channel to manipulate
764 * @device: ATA device (numbered from zero) to select
765 * @wait: non-zero to wait for Status register BSY bit to clear
766 * @can_sleep: non-zero if context allows sleeping
767 *
768 * Use the method defined in the ATA specification to
769 * make either device 0, or device 1, active on the
770 * ATA channel.
771 *
772 * This is a high-level version of ata_std_dev_select(),
773 * which additionally provides the services of inserting
774 * the proper pauses and status polling, where needed.
775 *
776 * LOCKING:
777 * caller.
778 */
779
780void ata_dev_select(struct ata_port *ap, unsigned int device,
781 unsigned int wait, unsigned int can_sleep)
782{
Tejun Heo88574552006-06-25 20:00:35 +0900783 if (ata_msg_probe(ap))
Borislav Petkov0dd4b212006-06-23 02:29:08 -0400784 ata_port_printk(ap, KERN_INFO, "ata_dev_select: ENTER, ata%u: "
Tejun Heo88574552006-06-25 20:00:35 +0900785 "device %u, wait %u\n", ap->id, device, wait);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700786
787 if (wait)
788 ata_wait_idle(ap);
789
790 ap->ops->dev_select(ap, device);
791
792 if (wait) {
793 if (can_sleep && ap->device[device].class == ATA_DEV_ATAPI)
794 msleep(150);
795 ata_wait_idle(ap);
796 }
797}
798
799/**
800 * ata_dump_id - IDENTIFY DEVICE info debugging output
Tejun Heo0bd33002006-02-12 22:47:05 +0900801 * @id: IDENTIFY DEVICE page to dump
Linus Torvalds1da177e2005-04-16 15:20:36 -0700802 *
Tejun Heo0bd33002006-02-12 22:47:05 +0900803 * Dump selected 16-bit words from the given IDENTIFY DEVICE
804 * page.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700805 *
806 * LOCKING:
807 * caller.
808 */
809
Tejun Heo0bd33002006-02-12 22:47:05 +0900810static inline void ata_dump_id(const u16 *id)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700811{
812 DPRINTK("49==0x%04x "
813 "53==0x%04x "
814 "63==0x%04x "
815 "64==0x%04x "
816 "75==0x%04x \n",
Tejun Heo0bd33002006-02-12 22:47:05 +0900817 id[49],
818 id[53],
819 id[63],
820 id[64],
821 id[75]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700822 DPRINTK("80==0x%04x "
823 "81==0x%04x "
824 "82==0x%04x "
825 "83==0x%04x "
826 "84==0x%04x \n",
Tejun Heo0bd33002006-02-12 22:47:05 +0900827 id[80],
828 id[81],
829 id[82],
830 id[83],
831 id[84]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700832 DPRINTK("88==0x%04x "
833 "93==0x%04x\n",
Tejun Heo0bd33002006-02-12 22:47:05 +0900834 id[88],
835 id[93]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700836}
837
Tejun Heocb95d562006-03-06 04:31:56 +0900838/**
839 * ata_id_xfermask - Compute xfermask from the given IDENTIFY data
840 * @id: IDENTIFY data to compute xfer mask from
841 *
842 * Compute the xfermask for this device. This is not as trivial
843 * as it seems if we must consider early devices correctly.
844 *
845 * FIXME: pre IDE drive timing (do we care ?).
846 *
847 * LOCKING:
848 * None.
849 *
850 * RETURNS:
851 * Computed xfermask
852 */
853static unsigned int ata_id_xfermask(const u16 *id)
854{
855 unsigned int pio_mask, mwdma_mask, udma_mask;
856
857 /* Usual case. Word 53 indicates word 64 is valid */
858 if (id[ATA_ID_FIELD_VALID] & (1 << 1)) {
859 pio_mask = id[ATA_ID_PIO_MODES] & 0x03;
860 pio_mask <<= 3;
861 pio_mask |= 0x7;
862 } else {
863 /* If word 64 isn't valid then Word 51 high byte holds
864 * the PIO timing number for the maximum. Turn it into
865 * a mask.
866 */
867 pio_mask = (2 << (id[ATA_ID_OLD_PIO_MODES] & 0xFF)) - 1 ;
868
869 /* But wait.. there's more. Design your standards by
870 * committee and you too can get a free iordy field to
871 * process. However its the speeds not the modes that
872 * are supported... Note drivers using the timing API
873 * will get this right anyway
874 */
875 }
876
877 mwdma_mask = id[ATA_ID_MWDMA_MODES] & 0x07;
Tejun Heofb21f0d2006-03-12 12:34:35 +0900878
879 udma_mask = 0;
880 if (id[ATA_ID_FIELD_VALID] & (1 << 2))
881 udma_mask = id[ATA_ID_UDMA_MODES] & 0xff;
Tejun Heocb95d562006-03-06 04:31:56 +0900882
883 return ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask);
884}
885
Tejun Heo86e45b62006-03-05 15:29:09 +0900886/**
887 * ata_port_queue_task - Queue port_task
888 * @ap: The ata_port to queue port_task for
Randy Dunlape2a7f772006-05-18 10:50:18 -0700889 * @fn: workqueue function to be scheduled
890 * @data: data value to pass to workqueue function
891 * @delay: delay time for workqueue function
Tejun Heo86e45b62006-03-05 15:29:09 +0900892 *
893 * Schedule @fn(@data) for execution after @delay jiffies using
894 * port_task. There is one port_task per port and it's the
895 * user(low level driver)'s responsibility to make sure that only
896 * one task is active at any given time.
897 *
898 * libata core layer takes care of synchronization between
899 * port_task and EH. ata_port_queue_task() may be ignored for EH
900 * synchronization.
901 *
902 * LOCKING:
903 * Inherited from caller.
904 */
905void ata_port_queue_task(struct ata_port *ap, void (*fn)(void *), void *data,
906 unsigned long delay)
907{
908 int rc;
909
Tejun Heo2e755f62006-03-05 15:29:09 +0900910 if (ap->flags & ATA_FLAG_FLUSH_PORT_TASK)
Tejun Heo86e45b62006-03-05 15:29:09 +0900911 return;
912
913 PREPARE_WORK(&ap->port_task, fn, data);
914
915 if (!delay)
916 rc = queue_work(ata_wq, &ap->port_task);
917 else
918 rc = queue_delayed_work(ata_wq, &ap->port_task, delay);
919
920 /* rc == 0 means that another user is using port task */
921 WARN_ON(rc == 0);
922}
923
924/**
925 * ata_port_flush_task - Flush port_task
926 * @ap: The ata_port to flush port_task for
927 *
928 * After this function completes, port_task is guranteed not to
929 * be running or scheduled.
930 *
931 * LOCKING:
932 * Kernel thread context (may sleep)
933 */
934void ata_port_flush_task(struct ata_port *ap)
935{
936 unsigned long flags;
937
938 DPRINTK("ENTER\n");
939
Jeff Garzikba6a1302006-06-22 23:46:10 -0400940 spin_lock_irqsave(ap->lock, flags);
Tejun Heo2e755f62006-03-05 15:29:09 +0900941 ap->flags |= ATA_FLAG_FLUSH_PORT_TASK;
Jeff Garzikba6a1302006-06-22 23:46:10 -0400942 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heo86e45b62006-03-05 15:29:09 +0900943
944 DPRINTK("flush #1\n");
945 flush_workqueue(ata_wq);
946
947 /*
948 * At this point, if a task is running, it's guaranteed to see
949 * the FLUSH flag; thus, it will never queue pio tasks again.
950 * Cancel and flush.
951 */
952 if (!cancel_delayed_work(&ap->port_task)) {
Borislav Petkov0dd4b212006-06-23 02:29:08 -0400953 if (ata_msg_ctl(ap))
Tejun Heo88574552006-06-25 20:00:35 +0900954 ata_port_printk(ap, KERN_DEBUG, "%s: flush #2\n",
955 __FUNCTION__);
Tejun Heo86e45b62006-03-05 15:29:09 +0900956 flush_workqueue(ata_wq);
957 }
958
Jeff Garzikba6a1302006-06-22 23:46:10 -0400959 spin_lock_irqsave(ap->lock, flags);
Tejun Heo2e755f62006-03-05 15:29:09 +0900960 ap->flags &= ~ATA_FLAG_FLUSH_PORT_TASK;
Jeff Garzikba6a1302006-06-22 23:46:10 -0400961 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heo86e45b62006-03-05 15:29:09 +0900962
Borislav Petkov0dd4b212006-06-23 02:29:08 -0400963 if (ata_msg_ctl(ap))
964 ata_port_printk(ap, KERN_DEBUG, "%s: EXIT\n", __FUNCTION__);
Tejun Heo86e45b62006-03-05 15:29:09 +0900965}
966
Tejun Heo77853bf2006-01-23 13:09:36 +0900967void ata_qc_complete_internal(struct ata_queued_cmd *qc)
Tejun Heoa2a7a662005-12-13 14:48:31 +0900968{
Tejun Heo77853bf2006-01-23 13:09:36 +0900969 struct completion *waiting = qc->private_data;
Tejun Heoa2a7a662005-12-13 14:48:31 +0900970
Tejun Heoa2a7a662005-12-13 14:48:31 +0900971 complete(waiting);
Tejun Heoa2a7a662005-12-13 14:48:31 +0900972}
973
974/**
975 * ata_exec_internal - execute libata internal command
Tejun Heoa2a7a662005-12-13 14:48:31 +0900976 * @dev: Device to which the command is sent
977 * @tf: Taskfile registers for the command and the result
Tejun Heod69cf372006-04-02 18:51:53 +0900978 * @cdb: CDB for packet command
Tejun Heoa2a7a662005-12-13 14:48:31 +0900979 * @dma_dir: Data tranfer direction of the command
980 * @buf: Data buffer of the command
981 * @buflen: Length of data buffer
982 *
983 * Executes libata internal command with timeout. @tf contains
984 * command on entry and result on return. Timeout and error
985 * conditions are reported via return value. No recovery action
986 * is taken after a command times out. It's caller's duty to
987 * clean up after timeout.
988 *
989 * LOCKING:
990 * None. Should be called with kernel context, might sleep.
Tejun Heo551e8882006-06-12 14:09:49 +0900991 *
992 * RETURNS:
993 * Zero on success, AC_ERR_* mask on failure
Tejun Heoa2a7a662005-12-13 14:48:31 +0900994 */
Tejun Heo3373efd2006-05-15 20:57:53 +0900995unsigned ata_exec_internal(struct ata_device *dev,
Tejun Heo1ad8e7f2006-04-02 18:51:53 +0900996 struct ata_taskfile *tf, const u8 *cdb,
997 int dma_dir, void *buf, unsigned int buflen)
Tejun Heoa2a7a662005-12-13 14:48:31 +0900998{
Tejun Heo3373efd2006-05-15 20:57:53 +0900999 struct ata_port *ap = dev->ap;
Tejun Heoa2a7a662005-12-13 14:48:31 +09001000 u8 command = tf->command;
1001 struct ata_queued_cmd *qc;
Tejun Heo2ab7db12006-05-15 20:58:02 +09001002 unsigned int tag, preempted_tag;
Tejun Heodedaf2b2006-05-15 21:03:43 +09001003 u32 preempted_sactive, preempted_qc_active;
Ingo Molnar60be6b92006-07-03 00:25:26 -07001004 DECLARE_COMPLETION_ONSTACK(wait);
Tejun Heoa2a7a662005-12-13 14:48:31 +09001005 unsigned long flags;
Tejun Heo77853bf2006-01-23 13:09:36 +09001006 unsigned int err_mask;
Tejun Heod95a7172006-05-15 20:58:14 +09001007 int rc;
Tejun Heoa2a7a662005-12-13 14:48:31 +09001008
Jeff Garzikba6a1302006-06-22 23:46:10 -04001009 spin_lock_irqsave(ap->lock, flags);
Tejun Heoa2a7a662005-12-13 14:48:31 +09001010
Tejun Heoe3180492006-05-15 20:58:09 +09001011 /* no internal command while frozen */
1012 if (ap->flags & ATA_FLAG_FROZEN) {
Jeff Garzikba6a1302006-06-22 23:46:10 -04001013 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heoe3180492006-05-15 20:58:09 +09001014 return AC_ERR_SYSTEM;
1015 }
1016
Tejun Heo2ab7db12006-05-15 20:58:02 +09001017 /* initialize internal qc */
Tejun Heoa2a7a662005-12-13 14:48:31 +09001018
Tejun Heo2ab7db12006-05-15 20:58:02 +09001019 /* XXX: Tag 0 is used for drivers with legacy EH as some
1020 * drivers choke if any other tag is given. This breaks
1021 * ata_tag_internal() test for those drivers. Don't use new
1022 * EH stuff without converting to it.
1023 */
1024 if (ap->ops->error_handler)
1025 tag = ATA_TAG_INTERNAL;
1026 else
1027 tag = 0;
1028
Tejun Heo6cec4a32006-05-15 21:03:41 +09001029 if (test_and_set_bit(tag, &ap->qc_allocated))
Tejun Heo2ab7db12006-05-15 20:58:02 +09001030 BUG();
Tejun Heof69499f2006-05-15 20:58:03 +09001031 qc = __ata_qc_from_tag(ap, tag);
Tejun Heo2ab7db12006-05-15 20:58:02 +09001032
1033 qc->tag = tag;
1034 qc->scsicmd = NULL;
1035 qc->ap = ap;
1036 qc->dev = dev;
1037 ata_qc_reinit(qc);
1038
1039 preempted_tag = ap->active_tag;
Tejun Heodedaf2b2006-05-15 21:03:43 +09001040 preempted_sactive = ap->sactive;
1041 preempted_qc_active = ap->qc_active;
Tejun Heo2ab7db12006-05-15 20:58:02 +09001042 ap->active_tag = ATA_TAG_POISON;
Tejun Heodedaf2b2006-05-15 21:03:43 +09001043 ap->sactive = 0;
1044 ap->qc_active = 0;
Tejun Heo2ab7db12006-05-15 20:58:02 +09001045
1046 /* prepare & issue qc */
Tejun Heoa2a7a662005-12-13 14:48:31 +09001047 qc->tf = *tf;
Tejun Heod69cf372006-04-02 18:51:53 +09001048 if (cdb)
1049 memcpy(qc->cdb, cdb, ATAPI_CDB_LEN);
Tejun Heoe61e0672006-05-15 20:57:40 +09001050 qc->flags |= ATA_QCFLAG_RESULT_TF;
Tejun Heoa2a7a662005-12-13 14:48:31 +09001051 qc->dma_dir = dma_dir;
1052 if (dma_dir != DMA_NONE) {
1053 ata_sg_init_one(qc, buf, buflen);
1054 qc->nsect = buflen / ATA_SECT_SIZE;
1055 }
1056
Tejun Heo77853bf2006-01-23 13:09:36 +09001057 qc->private_data = &wait;
Tejun Heoa2a7a662005-12-13 14:48:31 +09001058 qc->complete_fn = ata_qc_complete_internal;
1059
Tejun Heo8e0e6942006-03-31 20:41:11 +09001060 ata_qc_issue(qc);
Tejun Heoa2a7a662005-12-13 14:48:31 +09001061
Jeff Garzikba6a1302006-06-22 23:46:10 -04001062 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heoa2a7a662005-12-13 14:48:31 +09001063
Andrew Mortona8601e52006-06-25 01:36:52 -07001064 rc = wait_for_completion_timeout(&wait, ata_probe_timeout);
Albert Lee41ade502006-03-14 11:19:04 +08001065
Tejun Heod95a7172006-05-15 20:58:14 +09001066 ata_port_flush_task(ap);
1067
1068 if (!rc) {
Jeff Garzikba6a1302006-06-22 23:46:10 -04001069 spin_lock_irqsave(ap->lock, flags);
Tejun Heoa2a7a662005-12-13 14:48:31 +09001070
1071 /* We're racing with irq here. If we lose, the
1072 * following test prevents us from completing the qc
Tejun Heod95a7172006-05-15 20:58:14 +09001073 * twice. If we win, the port is frozen and will be
1074 * cleaned up by ->post_internal_cmd().
Tejun Heoa2a7a662005-12-13 14:48:31 +09001075 */
Tejun Heo77853bf2006-01-23 13:09:36 +09001076 if (qc->flags & ATA_QCFLAG_ACTIVE) {
Tejun Heod95a7172006-05-15 20:58:14 +09001077 qc->err_mask |= AC_ERR_TIMEOUT;
1078
1079 if (ap->ops->error_handler)
1080 ata_port_freeze(ap);
1081 else
1082 ata_qc_complete(qc);
Tejun Heof15a1da2006-05-15 20:57:56 +09001083
Borislav Petkov0dd4b212006-06-23 02:29:08 -04001084 if (ata_msg_warn(ap))
1085 ata_dev_printk(dev, KERN_WARNING,
Tejun Heo88574552006-06-25 20:00:35 +09001086 "qc timeout (cmd 0x%x)\n", command);
Tejun Heoa2a7a662005-12-13 14:48:31 +09001087 }
1088
Jeff Garzikba6a1302006-06-22 23:46:10 -04001089 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heoa2a7a662005-12-13 14:48:31 +09001090 }
1091
Tejun Heod95a7172006-05-15 20:58:14 +09001092 /* do post_internal_cmd */
1093 if (ap->ops->post_internal_cmd)
1094 ap->ops->post_internal_cmd(qc);
1095
1096 if (qc->flags & ATA_QCFLAG_FAILED && !qc->err_mask) {
Borislav Petkov0dd4b212006-06-23 02:29:08 -04001097 if (ata_msg_warn(ap))
Tejun Heo88574552006-06-25 20:00:35 +09001098 ata_dev_printk(dev, KERN_WARNING,
Borislav Petkov0dd4b212006-06-23 02:29:08 -04001099 "zero err_mask for failed "
Tejun Heo88574552006-06-25 20:00:35 +09001100 "internal command, assuming AC_ERR_OTHER\n");
Tejun Heod95a7172006-05-15 20:58:14 +09001101 qc->err_mask |= AC_ERR_OTHER;
1102 }
1103
Tejun Heo15869302006-05-15 20:57:33 +09001104 /* finish up */
Jeff Garzikba6a1302006-06-22 23:46:10 -04001105 spin_lock_irqsave(ap->lock, flags);
Tejun Heo15869302006-05-15 20:57:33 +09001106
Tejun Heoe61e0672006-05-15 20:57:40 +09001107 *tf = qc->result_tf;
Tejun Heo77853bf2006-01-23 13:09:36 +09001108 err_mask = qc->err_mask;
1109
1110 ata_qc_free(qc);
Tejun Heo2ab7db12006-05-15 20:58:02 +09001111 ap->active_tag = preempted_tag;
Tejun Heodedaf2b2006-05-15 21:03:43 +09001112 ap->sactive = preempted_sactive;
1113 ap->qc_active = preempted_qc_active;
Tejun Heo77853bf2006-01-23 13:09:36 +09001114
Tejun Heo1f7dd3e92006-03-24 15:25:30 +09001115 /* XXX - Some LLDDs (sata_mv) disable port on command failure.
1116 * Until those drivers are fixed, we detect the condition
1117 * here, fail the command with AC_ERR_SYSTEM and reenable the
1118 * port.
1119 *
1120 * Note that this doesn't change any behavior as internal
1121 * command failure results in disabling the device in the
1122 * higher layer for LLDDs without new reset/EH callbacks.
1123 *
1124 * Kill the following code as soon as those drivers are fixed.
1125 */
Tejun Heo198e0fe2006-04-02 18:51:52 +09001126 if (ap->flags & ATA_FLAG_DISABLED) {
Tejun Heo1f7dd3e92006-03-24 15:25:30 +09001127 err_mask |= AC_ERR_SYSTEM;
1128 ata_port_probe(ap);
1129 }
1130
Jeff Garzikba6a1302006-06-22 23:46:10 -04001131 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heo15869302006-05-15 20:57:33 +09001132
Tejun Heo77853bf2006-01-23 13:09:36 +09001133 return err_mask;
Tejun Heoa2a7a662005-12-13 14:48:31 +09001134}
1135
Linus Torvalds1da177e2005-04-16 15:20:36 -07001136/**
Tejun Heo977e6b92006-06-24 20:30:19 +09001137 * ata_do_simple_cmd - execute simple internal command
1138 * @dev: Device to which the command is sent
1139 * @cmd: Opcode to execute
1140 *
1141 * Execute a 'simple' command, that only consists of the opcode
1142 * 'cmd' itself, without filling any other registers
1143 *
1144 * LOCKING:
1145 * Kernel thread context (may sleep).
1146 *
1147 * RETURNS:
1148 * Zero on success, AC_ERR_* mask on failure
Tejun Heoe58eb582006-06-24 20:30:19 +09001149 */
Tejun Heo77b08fb2006-06-24 20:30:19 +09001150unsigned int ata_do_simple_cmd(struct ata_device *dev, u8 cmd)
Tejun Heoe58eb582006-06-24 20:30:19 +09001151{
1152 struct ata_taskfile tf;
Tejun Heoe58eb582006-06-24 20:30:19 +09001153
1154 ata_tf_init(dev, &tf);
1155
1156 tf.command = cmd;
1157 tf.flags |= ATA_TFLAG_DEVICE;
1158 tf.protocol = ATA_PROT_NODATA;
1159
Tejun Heo977e6b92006-06-24 20:30:19 +09001160 return ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0);
Tejun Heoe58eb582006-06-24 20:30:19 +09001161}
1162
Linus Torvalds1da177e2005-04-16 15:20:36 -07001163/**
Alan Cox1bc4ccf2006-01-09 17:18:14 +00001164 * ata_pio_need_iordy - check if iordy needed
1165 * @adev: ATA device
1166 *
1167 * Check if the current speed of the device requires IORDY. Used
1168 * by various controllers for chip configuration.
1169 */
1170
1171unsigned int ata_pio_need_iordy(const struct ata_device *adev)
1172{
1173 int pio;
1174 int speed = adev->pio_mode - XFER_PIO_0;
1175
1176 if (speed < 2)
1177 return 0;
1178 if (speed > 2)
1179 return 1;
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05001180
Alan Cox1bc4ccf2006-01-09 17:18:14 +00001181 /* If we have no drive specific rule, then PIO 2 is non IORDY */
1182
1183 if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE */
1184 pio = adev->id[ATA_ID_EIDE_PIO];
1185 /* Is the speed faster than the drive allows non IORDY ? */
1186 if (pio) {
1187 /* This is cycle times not frequency - watch the logic! */
1188 if (pio > 240) /* PIO2 is 240nS per cycle */
1189 return 1;
1190 return 0;
1191 }
1192 }
1193 return 0;
1194}
1195
1196/**
Tejun Heo49016ac2006-02-21 02:12:11 +09001197 * ata_dev_read_id - Read ID data from the specified device
Tejun Heo49016ac2006-02-21 02:12:11 +09001198 * @dev: target device
1199 * @p_class: pointer to class of the target device (may be changed)
1200 * @post_reset: is this read ID post-reset?
Tejun Heofe635c72006-05-15 20:57:35 +09001201 * @id: buffer to read IDENTIFY data into
Tejun Heo49016ac2006-02-21 02:12:11 +09001202 *
1203 * Read ID data from the specified device. ATA_CMD_ID_ATA is
1204 * performed on ATA devices and ATA_CMD_ID_ATAPI on ATAPI
Tejun Heoaec5c3c2006-03-25 01:33:34 +09001205 * devices. This function also issues ATA_CMD_INIT_DEV_PARAMS
1206 * for pre-ATA4 drives.
Tejun Heo49016ac2006-02-21 02:12:11 +09001207 *
1208 * LOCKING:
1209 * Kernel thread context (may sleep)
1210 *
1211 * RETURNS:
1212 * 0 on success, -errno otherwise.
1213 */
Tejun Heoa9beec92006-05-31 18:27:44 +09001214int ata_dev_read_id(struct ata_device *dev, unsigned int *p_class,
1215 int post_reset, u16 *id)
Tejun Heo49016ac2006-02-21 02:12:11 +09001216{
Tejun Heo3373efd2006-05-15 20:57:53 +09001217 struct ata_port *ap = dev->ap;
Tejun Heo49016ac2006-02-21 02:12:11 +09001218 unsigned int class = *p_class;
Tejun Heo49016ac2006-02-21 02:12:11 +09001219 struct ata_taskfile tf;
1220 unsigned int err_mask = 0;
1221 const char *reason;
1222 int rc;
1223
Borislav Petkov0dd4b212006-06-23 02:29:08 -04001224 if (ata_msg_ctl(ap))
Tejun Heo88574552006-06-25 20:00:35 +09001225 ata_dev_printk(dev, KERN_DEBUG, "%s: ENTER, host %u, dev %u\n",
1226 __FUNCTION__, ap->id, dev->devno);
Tejun Heo49016ac2006-02-21 02:12:11 +09001227
Tejun Heo49016ac2006-02-21 02:12:11 +09001228 ata_dev_select(ap, dev->devno, 1, 1); /* select device 0/1 */
1229
1230 retry:
Tejun Heo3373efd2006-05-15 20:57:53 +09001231 ata_tf_init(dev, &tf);
Tejun Heo49016ac2006-02-21 02:12:11 +09001232
1233 switch (class) {
1234 case ATA_DEV_ATA:
1235 tf.command = ATA_CMD_ID_ATA;
1236 break;
1237 case ATA_DEV_ATAPI:
1238 tf.command = ATA_CMD_ID_ATAPI;
1239 break;
1240 default:
1241 rc = -ENODEV;
1242 reason = "unsupported class";
1243 goto err_out;
1244 }
1245
1246 tf.protocol = ATA_PROT_PIO;
1247
Tejun Heo3373efd2006-05-15 20:57:53 +09001248 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_FROM_DEVICE,
Tejun Heo49016ac2006-02-21 02:12:11 +09001249 id, sizeof(id[0]) * ATA_ID_WORDS);
Tejun Heo49016ac2006-02-21 02:12:11 +09001250 if (err_mask) {
1251 rc = -EIO;
1252 reason = "I/O error";
Tejun Heo49016ac2006-02-21 02:12:11 +09001253 goto err_out;
1254 }
1255
1256 swap_buf_le16(id, ATA_ID_WORDS);
1257
Tejun Heo49016ac2006-02-21 02:12:11 +09001258 /* sanity check */
Alan Cox692785e2006-03-27 18:49:19 +01001259 if ((class == ATA_DEV_ATA) != (ata_id_is_ata(id) | ata_id_is_cfa(id))) {
Tejun Heo49016ac2006-02-21 02:12:11 +09001260 rc = -EINVAL;
1261 reason = "device reports illegal type";
1262 goto err_out;
1263 }
1264
1265 if (post_reset && class == ATA_DEV_ATA) {
1266 /*
1267 * The exact sequence expected by certain pre-ATA4 drives is:
1268 * SRST RESET
1269 * IDENTIFY
1270 * INITIALIZE DEVICE PARAMETERS
1271 * anything else..
1272 * Some drives were very specific about that exact sequence.
1273 */
1274 if (ata_id_major_version(id) < 4 || !ata_id_has_lba(id)) {
Tejun Heo3373efd2006-05-15 20:57:53 +09001275 err_mask = ata_dev_init_params(dev, id[3], id[6]);
Tejun Heo49016ac2006-02-21 02:12:11 +09001276 if (err_mask) {
1277 rc = -EIO;
1278 reason = "INIT_DEV_PARAMS failed";
1279 goto err_out;
1280 }
1281
1282 /* current CHS translation info (id[53-58]) might be
1283 * changed. reread the identify device info.
1284 */
1285 post_reset = 0;
1286 goto retry;
1287 }
1288 }
1289
1290 *p_class = class;
Tejun Heofe635c72006-05-15 20:57:35 +09001291
Tejun Heo49016ac2006-02-21 02:12:11 +09001292 return 0;
1293
1294 err_out:
Tejun Heo88574552006-06-25 20:00:35 +09001295 if (ata_msg_warn(ap))
Borislav Petkov0dd4b212006-06-23 02:29:08 -04001296 ata_dev_printk(dev, KERN_WARNING, "failed to IDENTIFY "
Tejun Heo88574552006-06-25 20:00:35 +09001297 "(%s, err_mask=0x%x)\n", reason, err_mask);
Tejun Heo49016ac2006-02-21 02:12:11 +09001298 return rc;
1299}
1300
Tejun Heo3373efd2006-05-15 20:57:53 +09001301static inline u8 ata_dev_knobble(struct ata_device *dev)
Tejun Heo4b2f3ed2006-03-01 16:09:36 +09001302{
Tejun Heo3373efd2006-05-15 20:57:53 +09001303 return ((dev->ap->cbl == ATA_CBL_SATA) && (!ata_id_is_sata(dev->id)));
Tejun Heo4b2f3ed2006-03-01 16:09:36 +09001304}
1305
Tejun Heoa6e6ce82006-05-15 21:03:48 +09001306static void ata_dev_config_ncq(struct ata_device *dev,
1307 char *desc, size_t desc_sz)
1308{
1309 struct ata_port *ap = dev->ap;
1310 int hdepth = 0, ddepth = ata_id_queue_depth(dev->id);
1311
1312 if (!ata_id_has_ncq(dev->id)) {
1313 desc[0] = '\0';
1314 return;
1315 }
1316
1317 if (ap->flags & ATA_FLAG_NCQ) {
1318 hdepth = min(ap->host->can_queue, ATA_MAX_QUEUE - 1);
1319 dev->flags |= ATA_DFLAG_NCQ;
1320 }
1321
1322 if (hdepth >= ddepth)
1323 snprintf(desc, desc_sz, "NCQ (depth %d)", ddepth);
1324 else
1325 snprintf(desc, desc_sz, "NCQ (depth %d/%d)", hdepth, ddepth);
1326}
1327
Brian Kinge6d902a2006-06-28 08:30:31 -05001328static void ata_set_port_max_cmd_len(struct ata_port *ap)
1329{
1330 int i;
1331
1332 if (ap->host) {
1333 ap->host->max_cmd_len = 0;
1334 for (i = 0; i < ATA_MAX_DEVICES; i++)
1335 ap->host->max_cmd_len = max_t(unsigned int,
1336 ap->host->max_cmd_len,
1337 ap->device[i].cdb_len);
1338 }
1339}
1340
Tejun Heo49016ac2006-02-21 02:12:11 +09001341/**
Tejun Heoffeae412006-03-01 16:09:35 +09001342 * ata_dev_configure - Configure the specified ATA/ATAPI device
Tejun Heoffeae412006-03-01 16:09:35 +09001343 * @dev: Target device to configure
Tejun Heo4c2d7212006-03-05 17:55:58 +09001344 * @print_info: Enable device info printout
Linus Torvalds1da177e2005-04-16 15:20:36 -07001345 *
Tejun Heoffeae412006-03-01 16:09:35 +09001346 * Configure @dev according to @dev->id. Generic and low-level
1347 * driver specific fixups are also applied.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001348 *
1349 * LOCKING:
Tejun Heoffeae412006-03-01 16:09:35 +09001350 * Kernel thread context (may sleep)
1351 *
1352 * RETURNS:
1353 * 0 on success, -errno otherwise
Linus Torvalds1da177e2005-04-16 15:20:36 -07001354 */
Tejun Heoa9beec92006-05-31 18:27:44 +09001355int ata_dev_configure(struct ata_device *dev, int print_info)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001356{
Tejun Heo3373efd2006-05-15 20:57:53 +09001357 struct ata_port *ap = dev->ap;
Tejun Heo1148c3a2006-03-13 19:48:04 +09001358 const u16 *id = dev->id;
Tejun Heoff8854b2006-03-06 04:31:56 +09001359 unsigned int xfer_mask;
Brian Kinge6d902a2006-06-28 08:30:31 -05001360 int rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001361
Borislav Petkov0dd4b212006-06-23 02:29:08 -04001362 if (!ata_dev_enabled(dev) && ata_msg_info(ap)) {
Tejun Heo88574552006-06-25 20:00:35 +09001363 ata_dev_printk(dev, KERN_INFO,
1364 "%s: ENTER/EXIT (host %u, dev %u) -- nodev\n",
1365 __FUNCTION__, ap->id, dev->devno);
Tejun Heoffeae412006-03-01 16:09:35 +09001366 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001367 }
1368
Borislav Petkov0dd4b212006-06-23 02:29:08 -04001369 if (ata_msg_probe(ap))
Tejun Heo88574552006-06-25 20:00:35 +09001370 ata_dev_printk(dev, KERN_DEBUG, "%s: ENTER, host %u, dev %u\n",
1371 __FUNCTION__, ap->id, dev->devno);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001372
Tejun Heoc39f5eb2006-03-13 19:51:19 +09001373 /* print device capabilities */
Borislav Petkov0dd4b212006-06-23 02:29:08 -04001374 if (ata_msg_probe(ap))
Tejun Heo88574552006-06-25 20:00:35 +09001375 ata_dev_printk(dev, KERN_DEBUG,
1376 "%s: cfg 49:%04x 82:%04x 83:%04x 84:%04x "
1377 "85:%04x 86:%04x 87:%04x 88:%04x\n",
Borislav Petkov0dd4b212006-06-23 02:29:08 -04001378 __FUNCTION__,
Tejun Heof15a1da2006-05-15 20:57:56 +09001379 id[49], id[82], id[83], id[84],
1380 id[85], id[86], id[87], id[88]);
Tejun Heoc39f5eb2006-03-13 19:51:19 +09001381
Tejun Heo208a9932006-03-05 17:55:58 +09001382 /* initialize to-be-configured parameters */
Tejun Heoea1dd4e2006-04-02 18:51:53 +09001383 dev->flags &= ~ATA_DFLAG_CFG_MASK;
Tejun Heo208a9932006-03-05 17:55:58 +09001384 dev->max_sectors = 0;
1385 dev->cdb_len = 0;
1386 dev->n_sectors = 0;
1387 dev->cylinders = 0;
1388 dev->heads = 0;
1389 dev->sectors = 0;
1390
Linus Torvalds1da177e2005-04-16 15:20:36 -07001391 /*
1392 * common ATA, ATAPI feature tests
1393 */
1394
Tejun Heoff8854b2006-03-06 04:31:56 +09001395 /* find max transfer mode; for printk only */
Tejun Heo1148c3a2006-03-13 19:48:04 +09001396 xfer_mask = ata_id_xfermask(id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001397
Borislav Petkov0dd4b212006-06-23 02:29:08 -04001398 if (ata_msg_probe(ap))
1399 ata_dump_id(id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001400
1401 /* ATA-specific feature tests */
1402 if (dev->class == ATA_DEV_ATA) {
Tejun Heo1148c3a2006-03-13 19:48:04 +09001403 dev->n_sectors = ata_id_n_sectors(id);
Tejun Heo29407402006-02-12 22:47:04 +09001404
Tejun Heo1148c3a2006-03-13 19:48:04 +09001405 if (ata_id_has_lba(id)) {
Tejun Heo4c2d7212006-03-05 17:55:58 +09001406 const char *lba_desc;
Tejun Heoa6e6ce82006-05-15 21:03:48 +09001407 char ncq_desc[20];
Albert Lee8bf62ece2005-05-12 15:29:42 -04001408
Tejun Heo4c2d7212006-03-05 17:55:58 +09001409 lba_desc = "LBA";
1410 dev->flags |= ATA_DFLAG_LBA;
Tejun Heo1148c3a2006-03-13 19:48:04 +09001411 if (ata_id_has_lba48(id)) {
Albert Lee8bf62ece2005-05-12 15:29:42 -04001412 dev->flags |= ATA_DFLAG_LBA48;
Tejun Heo4c2d7212006-03-05 17:55:58 +09001413 lba_desc = "LBA48";
1414 }
Albert Lee8bf62ece2005-05-12 15:29:42 -04001415
Tejun Heoa6e6ce82006-05-15 21:03:48 +09001416 /* config NCQ */
1417 ata_dev_config_ncq(dev, ncq_desc, sizeof(ncq_desc));
1418
Albert Lee8bf62ece2005-05-12 15:29:42 -04001419 /* print device info to dmesg */
Borislav Petkov0dd4b212006-06-23 02:29:08 -04001420 if (ata_msg_info(ap))
Tejun Heof15a1da2006-05-15 20:57:56 +09001421 ata_dev_printk(dev, KERN_INFO, "ATA-%d, "
Tejun Heoa6e6ce82006-05-15 21:03:48 +09001422 "max %s, %Lu sectors: %s %s\n",
Tejun Heof15a1da2006-05-15 20:57:56 +09001423 ata_id_major_version(id),
1424 ata_mode_string(xfer_mask),
1425 (unsigned long long)dev->n_sectors,
Tejun Heoa6e6ce82006-05-15 21:03:48 +09001426 lba_desc, ncq_desc);
Tejun Heoffeae412006-03-01 16:09:35 +09001427 } else {
Albert Lee8bf62ece2005-05-12 15:29:42 -04001428 /* CHS */
1429
1430 /* Default translation */
Tejun Heo1148c3a2006-03-13 19:48:04 +09001431 dev->cylinders = id[1];
1432 dev->heads = id[3];
1433 dev->sectors = id[6];
Albert Lee8bf62ece2005-05-12 15:29:42 -04001434
Tejun Heo1148c3a2006-03-13 19:48:04 +09001435 if (ata_id_current_chs_valid(id)) {
Albert Lee8bf62ece2005-05-12 15:29:42 -04001436 /* Current CHS translation is valid. */
Tejun Heo1148c3a2006-03-13 19:48:04 +09001437 dev->cylinders = id[54];
1438 dev->heads = id[55];
1439 dev->sectors = id[56];
Albert Lee8bf62ece2005-05-12 15:29:42 -04001440 }
1441
1442 /* print device info to dmesg */
Borislav Petkov0dd4b212006-06-23 02:29:08 -04001443 if (ata_msg_info(ap))
Tejun Heof15a1da2006-05-15 20:57:56 +09001444 ata_dev_printk(dev, KERN_INFO, "ATA-%d, "
1445 "max %s, %Lu sectors: CHS %u/%u/%u\n",
1446 ata_id_major_version(id),
1447 ata_mode_string(xfer_mask),
1448 (unsigned long long)dev->n_sectors,
Tejun Heo88574552006-06-25 20:00:35 +09001449 dev->cylinders, dev->heads,
1450 dev->sectors);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001451 }
1452
Albert Lee07f6f7d2005-11-01 19:33:20 +08001453 if (dev->id[59] & 0x100) {
1454 dev->multi_count = dev->id[59] & 0xff;
Borislav Petkov0dd4b212006-06-23 02:29:08 -04001455 if (ata_msg_info(ap))
Tejun Heo88574552006-06-25 20:00:35 +09001456 ata_dev_printk(dev, KERN_INFO,
1457 "ata%u: dev %u multi count %u\n",
1458 ap->id, dev->devno, dev->multi_count);
Albert Lee07f6f7d2005-11-01 19:33:20 +08001459 }
1460
Tejun Heo6e7846e2006-02-12 23:32:58 +09001461 dev->cdb_len = 16;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001462 }
1463
1464 /* ATAPI-specific feature tests */
Jeff Garzik2c13b7c2005-11-14 14:14:16 -05001465 else if (dev->class == ATA_DEV_ATAPI) {
Albert Lee08a556d2006-03-31 13:29:04 +08001466 char *cdb_intr_string = "";
1467
Tejun Heo1148c3a2006-03-13 19:48:04 +09001468 rc = atapi_cdb_len(id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001469 if ((rc < 12) || (rc > ATAPI_CDB_LEN)) {
Borislav Petkov0dd4b212006-06-23 02:29:08 -04001470 if (ata_msg_warn(ap))
Tejun Heo88574552006-06-25 20:00:35 +09001471 ata_dev_printk(dev, KERN_WARNING,
1472 "unsupported CDB len\n");
Tejun Heoffeae412006-03-01 16:09:35 +09001473 rc = -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001474 goto err_out_nosup;
1475 }
Tejun Heo6e7846e2006-02-12 23:32:58 +09001476 dev->cdb_len = (unsigned int) rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001477
Albert Lee08a556d2006-03-31 13:29:04 +08001478 if (ata_id_cdb_intr(dev->id)) {
Albert Lee312f7da2005-09-27 17:38:03 +08001479 dev->flags |= ATA_DFLAG_CDB_INTR;
Albert Lee08a556d2006-03-31 13:29:04 +08001480 cdb_intr_string = ", CDB intr";
1481 }
Albert Lee312f7da2005-09-27 17:38:03 +08001482
Linus Torvalds1da177e2005-04-16 15:20:36 -07001483 /* print device info to dmesg */
Borislav Petkov0dd4b212006-06-23 02:29:08 -04001484 if (ata_msg_info(ap))
Tejun Heo12436c32006-05-15 20:59:15 +09001485 ata_dev_printk(dev, KERN_INFO, "ATAPI, max %s%s\n",
1486 ata_mode_string(xfer_mask),
1487 cdb_intr_string);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001488 }
1489
Brian Kinge6d902a2006-06-28 08:30:31 -05001490 ata_set_port_max_cmd_len(ap);
Tejun Heo6e7846e2006-02-12 23:32:58 +09001491
Tejun Heo4b2f3ed2006-03-01 16:09:36 +09001492 /* limit bridge transfers to udma5, 200 sectors */
Tejun Heo3373efd2006-05-15 20:57:53 +09001493 if (ata_dev_knobble(dev)) {
Borislav Petkov0dd4b212006-06-23 02:29:08 -04001494 if (ata_msg_info(ap))
Tejun Heof15a1da2006-05-15 20:57:56 +09001495 ata_dev_printk(dev, KERN_INFO,
1496 "applying bridge limits\n");
Tejun Heo5a529132006-03-24 14:07:50 +09001497 dev->udma_mask &= ATA_UDMA5;
Tejun Heo4b2f3ed2006-03-01 16:09:36 +09001498 dev->max_sectors = ATA_MAX_SECTORS;
1499 }
1500
1501 if (ap->ops->dev_config)
1502 ap->ops->dev_config(ap, dev);
1503
Borislav Petkov0dd4b212006-06-23 02:29:08 -04001504 if (ata_msg_probe(ap))
1505 ata_dev_printk(dev, KERN_DEBUG, "%s: EXIT, drv_stat = 0x%x\n",
1506 __FUNCTION__, ata_chk_status(ap));
Tejun Heoffeae412006-03-01 16:09:35 +09001507 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001508
1509err_out_nosup:
Borislav Petkov0dd4b212006-06-23 02:29:08 -04001510 if (ata_msg_probe(ap))
Tejun Heo88574552006-06-25 20:00:35 +09001511 ata_dev_printk(dev, KERN_DEBUG,
1512 "%s: EXIT, err\n", __FUNCTION__);
Tejun Heoffeae412006-03-01 16:09:35 +09001513 return rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001514}
1515
1516/**
1517 * ata_bus_probe - Reset and probe ATA bus
1518 * @ap: Bus to probe
1519 *
Jeff Garzik0cba6322005-05-30 19:49:12 -04001520 * Master ATA bus probing function. Initiates a hardware-dependent
1521 * bus reset, then attempts to identify any devices found on
1522 * the bus.
1523 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07001524 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04001525 * PCI/etc. bus probe sem.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001526 *
1527 * RETURNS:
Tejun Heo96072e62006-04-01 01:38:17 +09001528 * Zero on success, negative errno otherwise.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001529 */
1530
1531static int ata_bus_probe(struct ata_port *ap)
1532{
Tejun Heo28ca5c52006-03-01 16:09:36 +09001533 unsigned int classes[ATA_MAX_DEVICES];
Tejun Heo14d2bac2006-04-02 17:54:46 +09001534 int tries[ATA_MAX_DEVICES];
1535 int i, rc, down_xfermask;
Tejun Heoe82cbdb2006-04-01 01:38:18 +09001536 struct ata_device *dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001537
Tejun Heo28ca5c52006-03-01 16:09:36 +09001538 ata_port_probe(ap);
1539
Tejun Heo14d2bac2006-04-02 17:54:46 +09001540 for (i = 0; i < ATA_MAX_DEVICES; i++)
1541 tries[i] = ATA_PROBE_MAX_TRIES;
1542
1543 retry:
1544 down_xfermask = 0;
1545
Tejun Heo20444702006-03-13 01:57:01 +09001546 /* reset and determine device classes */
Tejun Heo52783c52006-05-31 18:28:22 +09001547 ap->ops->phy_reset(ap);
Tejun Heo2061a472006-03-12 00:57:39 +09001548
Tejun Heo52783c52006-05-31 18:28:22 +09001549 for (i = 0; i < ATA_MAX_DEVICES; i++) {
1550 dev = &ap->device[i];
Tejun Heoc19ba8a2006-01-24 17:05:22 +09001551
Tejun Heo52783c52006-05-31 18:28:22 +09001552 if (!(ap->flags & ATA_FLAG_DISABLED) &&
1553 dev->class != ATA_DEV_UNKNOWN)
1554 classes[dev->devno] = dev->class;
1555 else
1556 classes[dev->devno] = ATA_DEV_NONE;
Tejun Heo20444702006-03-13 01:57:01 +09001557
Tejun Heo52783c52006-05-31 18:28:22 +09001558 dev->class = ATA_DEV_UNKNOWN;
Tejun Heo28ca5c52006-03-01 16:09:36 +09001559 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001560
Tejun Heo52783c52006-05-31 18:28:22 +09001561 ata_port_probe(ap);
Tejun Heo20444702006-03-13 01:57:01 +09001562
Alan Coxb6079ca2006-05-22 16:52:06 +01001563 /* after the reset the device state is PIO 0 and the controller
1564 state is undefined. Record the mode */
1565
1566 for (i = 0; i < ATA_MAX_DEVICES; i++)
1567 ap->device[i].pio_mode = XFER_PIO_0;
1568
Tejun Heo28ca5c52006-03-01 16:09:36 +09001569 /* read IDENTIFY page and configure devices */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001570 for (i = 0; i < ATA_MAX_DEVICES; i++) {
Tejun Heoe82cbdb2006-04-01 01:38:18 +09001571 dev = &ap->device[i];
Tejun Heo28ca5c52006-03-01 16:09:36 +09001572
Tejun Heoec573752006-04-11 22:26:29 +09001573 if (tries[i])
1574 dev->class = classes[i];
Tejun Heo14d2bac2006-04-02 17:54:46 +09001575
Tejun Heoe1211e32006-04-01 01:38:18 +09001576 if (!ata_dev_enabled(dev))
Tejun Heoffeae412006-03-01 16:09:35 +09001577 continue;
1578
Tejun Heo3373efd2006-05-15 20:57:53 +09001579 rc = ata_dev_read_id(dev, &dev->class, 1, dev->id);
Tejun Heo14d2bac2006-04-02 17:54:46 +09001580 if (rc)
1581 goto fail;
Tejun Heoffeae412006-03-01 16:09:35 +09001582
Tejun Heo3373efd2006-05-15 20:57:53 +09001583 rc = ata_dev_configure(dev, 1);
Tejun Heo14d2bac2006-04-02 17:54:46 +09001584 if (rc)
1585 goto fail;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001586 }
1587
Tejun Heoe82cbdb2006-04-01 01:38:18 +09001588 /* configure transfer mode */
Tejun Heo3adcebb2006-05-15 20:57:37 +09001589 rc = ata_set_mode(ap, &dev);
Tejun Heo51713d32006-04-11 22:26:29 +09001590 if (rc) {
1591 down_xfermask = 1;
1592 goto fail;
Tejun Heoe82cbdb2006-04-01 01:38:18 +09001593 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001594
Tejun Heoe82cbdb2006-04-01 01:38:18 +09001595 for (i = 0; i < ATA_MAX_DEVICES; i++)
1596 if (ata_dev_enabled(&ap->device[i]))
1597 return 0;
Alan Coxe35a9e02006-03-27 18:46:37 +01001598
Tejun Heoe82cbdb2006-04-01 01:38:18 +09001599 /* no device present, disable port */
1600 ata_port_disable(ap);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001601 ap->ops->port_disable(ap);
Tejun Heo96072e62006-04-01 01:38:17 +09001602 return -ENODEV;
Tejun Heo14d2bac2006-04-02 17:54:46 +09001603
1604 fail:
1605 switch (rc) {
1606 case -EINVAL:
1607 case -ENODEV:
1608 tries[dev->devno] = 0;
1609 break;
1610 case -EIO:
Tejun Heo3c567b72006-05-15 20:57:23 +09001611 sata_down_spd_limit(ap);
Tejun Heo14d2bac2006-04-02 17:54:46 +09001612 /* fall through */
1613 default:
1614 tries[dev->devno]--;
1615 if (down_xfermask &&
Tejun Heo3373efd2006-05-15 20:57:53 +09001616 ata_down_xfermask_limit(dev, tries[dev->devno] == 1))
Tejun Heo14d2bac2006-04-02 17:54:46 +09001617 tries[dev->devno] = 0;
1618 }
1619
Tejun Heoec573752006-04-11 22:26:29 +09001620 if (!tries[dev->devno]) {
Tejun Heo3373efd2006-05-15 20:57:53 +09001621 ata_down_xfermask_limit(dev, 1);
1622 ata_dev_disable(dev);
Tejun Heoec573752006-04-11 22:26:29 +09001623 }
1624
Tejun Heo14d2bac2006-04-02 17:54:46 +09001625 goto retry;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001626}
1627
1628/**
Jeff Garzik0cba6322005-05-30 19:49:12 -04001629 * ata_port_probe - Mark port as enabled
1630 * @ap: Port for which we indicate enablement
Linus Torvalds1da177e2005-04-16 15:20:36 -07001631 *
Jeff Garzik0cba6322005-05-30 19:49:12 -04001632 * Modify @ap data structure such that the system
1633 * thinks that the entire port is enabled.
1634 *
1635 * LOCKING: host_set lock, or some other form of
1636 * serialization.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001637 */
1638
1639void ata_port_probe(struct ata_port *ap)
1640{
Tejun Heo198e0fe2006-04-02 18:51:52 +09001641 ap->flags &= ~ATA_FLAG_DISABLED;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001642}
1643
1644/**
Tejun Heo3be680b2005-12-19 22:35:02 +09001645 * sata_print_link_status - Print SATA link status
1646 * @ap: SATA port to printk link status about
1647 *
1648 * This function prints link speed and status of a SATA link.
1649 *
1650 * LOCKING:
1651 * None.
1652 */
1653static void sata_print_link_status(struct ata_port *ap)
1654{
Tejun Heo6d5f9732006-04-03 00:09:41 +09001655 u32 sstatus, scontrol, tmp;
Tejun Heo3be680b2005-12-19 22:35:02 +09001656
Tejun Heo81952c52006-05-15 20:57:47 +09001657 if (sata_scr_read(ap, SCR_STATUS, &sstatus))
Tejun Heo3be680b2005-12-19 22:35:02 +09001658 return;
Tejun Heo81952c52006-05-15 20:57:47 +09001659 sata_scr_read(ap, SCR_CONTROL, &scontrol);
Tejun Heo3be680b2005-12-19 22:35:02 +09001660
Tejun Heo81952c52006-05-15 20:57:47 +09001661 if (ata_port_online(ap)) {
Tejun Heo3be680b2005-12-19 22:35:02 +09001662 tmp = (sstatus >> 4) & 0xf;
Tejun Heof15a1da2006-05-15 20:57:56 +09001663 ata_port_printk(ap, KERN_INFO,
1664 "SATA link up %s (SStatus %X SControl %X)\n",
1665 sata_spd_string(tmp), sstatus, scontrol);
Tejun Heo3be680b2005-12-19 22:35:02 +09001666 } else {
Tejun Heof15a1da2006-05-15 20:57:56 +09001667 ata_port_printk(ap, KERN_INFO,
1668 "SATA link down (SStatus %X SControl %X)\n",
1669 sstatus, scontrol);
Tejun Heo3be680b2005-12-19 22:35:02 +09001670 }
1671}
1672
1673/**
Jeff Garzik780a87f2005-05-30 15:41:05 -04001674 * __sata_phy_reset - Wake/reset a low-level SATA PHY
1675 * @ap: SATA port associated with target SATA PHY.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001676 *
Jeff Garzik780a87f2005-05-30 15:41:05 -04001677 * This function issues commands to standard SATA Sxxx
1678 * PHY registers, to wake up the phy (and device), and
1679 * clear any reset condition.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001680 *
1681 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04001682 * PCI/etc. bus probe sem.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001683 *
1684 */
1685void __sata_phy_reset(struct ata_port *ap)
1686{
1687 u32 sstatus;
1688 unsigned long timeout = jiffies + (HZ * 5);
1689
1690 if (ap->flags & ATA_FLAG_SATA_RESET) {
Brett Russcdcca89e2005-03-28 15:10:27 -05001691 /* issue phy wake/reset */
Tejun Heo81952c52006-05-15 20:57:47 +09001692 sata_scr_write_flush(ap, SCR_CONTROL, 0x301);
Tejun Heo62ba2842005-06-26 23:27:19 +09001693 /* Couldn't find anything in SATA I/II specs, but
1694 * AHCI-1.1 10.4.2 says at least 1 ms. */
1695 mdelay(1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001696 }
Tejun Heo81952c52006-05-15 20:57:47 +09001697 /* phy wake/clear reset */
1698 sata_scr_write_flush(ap, SCR_CONTROL, 0x300);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001699
1700 /* wait for phy to become ready, if necessary */
1701 do {
1702 msleep(200);
Tejun Heo81952c52006-05-15 20:57:47 +09001703 sata_scr_read(ap, SCR_STATUS, &sstatus);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001704 if ((sstatus & 0xf) != 1)
1705 break;
1706 } while (time_before(jiffies, timeout));
1707
Tejun Heo3be680b2005-12-19 22:35:02 +09001708 /* print link status */
1709 sata_print_link_status(ap);
Jeff Garzik656563e2005-11-20 03:36:45 -05001710
Tejun Heo3be680b2005-12-19 22:35:02 +09001711 /* TODO: phy layer with polling, timeouts, etc. */
Tejun Heo81952c52006-05-15 20:57:47 +09001712 if (!ata_port_offline(ap))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001713 ata_port_probe(ap);
Tejun Heo3be680b2005-12-19 22:35:02 +09001714 else
Linus Torvalds1da177e2005-04-16 15:20:36 -07001715 ata_port_disable(ap);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001716
Tejun Heo198e0fe2006-04-02 18:51:52 +09001717 if (ap->flags & ATA_FLAG_DISABLED)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001718 return;
1719
1720 if (ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT)) {
1721 ata_port_disable(ap);
1722 return;
1723 }
1724
1725 ap->cbl = ATA_CBL_SATA;
1726}
1727
1728/**
Jeff Garzik780a87f2005-05-30 15:41:05 -04001729 * sata_phy_reset - Reset SATA bus.
1730 * @ap: SATA port associated with target SATA PHY.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001731 *
Jeff Garzik780a87f2005-05-30 15:41:05 -04001732 * This function resets the SATA bus, and then probes
1733 * the bus for devices.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001734 *
1735 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04001736 * PCI/etc. bus probe sem.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001737 *
1738 */
1739void sata_phy_reset(struct ata_port *ap)
1740{
1741 __sata_phy_reset(ap);
Tejun Heo198e0fe2006-04-02 18:51:52 +09001742 if (ap->flags & ATA_FLAG_DISABLED)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001743 return;
1744 ata_bus_reset(ap);
1745}
1746
1747/**
Alan Coxebdfca62006-03-23 15:38:34 +00001748 * ata_dev_pair - return other device on cable
Alan Coxebdfca62006-03-23 15:38:34 +00001749 * @adev: device
1750 *
1751 * Obtain the other device on the same cable, or if none is
1752 * present NULL is returned
1753 */
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05001754
Tejun Heo3373efd2006-05-15 20:57:53 +09001755struct ata_device *ata_dev_pair(struct ata_device *adev)
Alan Coxebdfca62006-03-23 15:38:34 +00001756{
Tejun Heo3373efd2006-05-15 20:57:53 +09001757 struct ata_port *ap = adev->ap;
Alan Coxebdfca62006-03-23 15:38:34 +00001758 struct ata_device *pair = &ap->device[1 - adev->devno];
Tejun Heoe1211e32006-04-01 01:38:18 +09001759 if (!ata_dev_enabled(pair))
Alan Coxebdfca62006-03-23 15:38:34 +00001760 return NULL;
1761 return pair;
1762}
1763
1764/**
Jeff Garzik780a87f2005-05-30 15:41:05 -04001765 * ata_port_disable - Disable port.
1766 * @ap: Port to be disabled.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001767 *
Jeff Garzik780a87f2005-05-30 15:41:05 -04001768 * Modify @ap data structure such that the system
1769 * thinks that the entire port is disabled, and should
1770 * never attempt to probe or communicate with devices
1771 * on this port.
1772 *
1773 * LOCKING: host_set lock, or some other form of
1774 * serialization.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001775 */
1776
1777void ata_port_disable(struct ata_port *ap)
1778{
1779 ap->device[0].class = ATA_DEV_NONE;
1780 ap->device[1].class = ATA_DEV_NONE;
Tejun Heo198e0fe2006-04-02 18:51:52 +09001781 ap->flags |= ATA_FLAG_DISABLED;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001782}
1783
Tejun Heo1c3fae42006-04-02 20:53:28 +09001784/**
Tejun Heo3c567b72006-05-15 20:57:23 +09001785 * sata_down_spd_limit - adjust SATA spd limit downward
Tejun Heo1c3fae42006-04-02 20:53:28 +09001786 * @ap: Port to adjust SATA spd limit for
1787 *
1788 * Adjust SATA spd limit of @ap downward. Note that this
1789 * function only adjusts the limit. The change must be applied
Tejun Heo3c567b72006-05-15 20:57:23 +09001790 * using sata_set_spd().
Tejun Heo1c3fae42006-04-02 20:53:28 +09001791 *
1792 * LOCKING:
1793 * Inherited from caller.
1794 *
1795 * RETURNS:
1796 * 0 on success, negative errno on failure
1797 */
Tejun Heo3c567b72006-05-15 20:57:23 +09001798int sata_down_spd_limit(struct ata_port *ap)
Tejun Heo1c3fae42006-04-02 20:53:28 +09001799{
Tejun Heo81952c52006-05-15 20:57:47 +09001800 u32 sstatus, spd, mask;
1801 int rc, highbit;
Tejun Heo1c3fae42006-04-02 20:53:28 +09001802
Tejun Heo81952c52006-05-15 20:57:47 +09001803 rc = sata_scr_read(ap, SCR_STATUS, &sstatus);
1804 if (rc)
1805 return rc;
Tejun Heo1c3fae42006-04-02 20:53:28 +09001806
1807 mask = ap->sata_spd_limit;
1808 if (mask <= 1)
1809 return -EINVAL;
1810 highbit = fls(mask) - 1;
1811 mask &= ~(1 << highbit);
1812
Tejun Heo81952c52006-05-15 20:57:47 +09001813 spd = (sstatus >> 4) & 0xf;
Tejun Heo1c3fae42006-04-02 20:53:28 +09001814 if (spd <= 1)
1815 return -EINVAL;
1816 spd--;
1817 mask &= (1 << spd) - 1;
1818 if (!mask)
1819 return -EINVAL;
1820
1821 ap->sata_spd_limit = mask;
1822
Tejun Heof15a1da2006-05-15 20:57:56 +09001823 ata_port_printk(ap, KERN_WARNING, "limiting SATA link speed to %s\n",
1824 sata_spd_string(fls(mask)));
Tejun Heo1c3fae42006-04-02 20:53:28 +09001825
1826 return 0;
1827}
1828
Tejun Heo3c567b72006-05-15 20:57:23 +09001829static int __sata_set_spd_needed(struct ata_port *ap, u32 *scontrol)
Tejun Heo1c3fae42006-04-02 20:53:28 +09001830{
1831 u32 spd, limit;
1832
1833 if (ap->sata_spd_limit == UINT_MAX)
1834 limit = 0;
1835 else
1836 limit = fls(ap->sata_spd_limit);
1837
1838 spd = (*scontrol >> 4) & 0xf;
1839 *scontrol = (*scontrol & ~0xf0) | ((limit & 0xf) << 4);
1840
1841 return spd != limit;
1842}
1843
1844/**
Tejun Heo3c567b72006-05-15 20:57:23 +09001845 * sata_set_spd_needed - is SATA spd configuration needed
Tejun Heo1c3fae42006-04-02 20:53:28 +09001846 * @ap: Port in question
1847 *
1848 * Test whether the spd limit in SControl matches
1849 * @ap->sata_spd_limit. This function is used to determine
1850 * whether hardreset is necessary to apply SATA spd
1851 * configuration.
1852 *
1853 * LOCKING:
1854 * Inherited from caller.
1855 *
1856 * RETURNS:
1857 * 1 if SATA spd configuration is needed, 0 otherwise.
1858 */
Tejun Heo3c567b72006-05-15 20:57:23 +09001859int sata_set_spd_needed(struct ata_port *ap)
Tejun Heo1c3fae42006-04-02 20:53:28 +09001860{
1861 u32 scontrol;
1862
Tejun Heo81952c52006-05-15 20:57:47 +09001863 if (sata_scr_read(ap, SCR_CONTROL, &scontrol))
Tejun Heo1c3fae42006-04-02 20:53:28 +09001864 return 0;
1865
Tejun Heo3c567b72006-05-15 20:57:23 +09001866 return __sata_set_spd_needed(ap, &scontrol);
Tejun Heo1c3fae42006-04-02 20:53:28 +09001867}
1868
1869/**
Tejun Heo3c567b72006-05-15 20:57:23 +09001870 * sata_set_spd - set SATA spd according to spd limit
Tejun Heo1c3fae42006-04-02 20:53:28 +09001871 * @ap: Port to set SATA spd for
1872 *
1873 * Set SATA spd of @ap according to sata_spd_limit.
1874 *
1875 * LOCKING:
1876 * Inherited from caller.
1877 *
1878 * RETURNS:
1879 * 0 if spd doesn't need to be changed, 1 if spd has been
Tejun Heo81952c52006-05-15 20:57:47 +09001880 * changed. Negative errno if SCR registers are inaccessible.
Tejun Heo1c3fae42006-04-02 20:53:28 +09001881 */
Tejun Heo3c567b72006-05-15 20:57:23 +09001882int sata_set_spd(struct ata_port *ap)
Tejun Heo1c3fae42006-04-02 20:53:28 +09001883{
1884 u32 scontrol;
Tejun Heo81952c52006-05-15 20:57:47 +09001885 int rc;
Tejun Heo1c3fae42006-04-02 20:53:28 +09001886
Tejun Heo81952c52006-05-15 20:57:47 +09001887 if ((rc = sata_scr_read(ap, SCR_CONTROL, &scontrol)))
1888 return rc;
Tejun Heo1c3fae42006-04-02 20:53:28 +09001889
Tejun Heo3c567b72006-05-15 20:57:23 +09001890 if (!__sata_set_spd_needed(ap, &scontrol))
Tejun Heo1c3fae42006-04-02 20:53:28 +09001891 return 0;
1892
Tejun Heo81952c52006-05-15 20:57:47 +09001893 if ((rc = sata_scr_write(ap, SCR_CONTROL, scontrol)))
1894 return rc;
1895
Tejun Heo1c3fae42006-04-02 20:53:28 +09001896 return 1;
1897}
1898
Alan Cox452503f2005-10-21 19:01:32 -04001899/*
1900 * This mode timing computation functionality is ported over from
1901 * drivers/ide/ide-timing.h and was originally written by Vojtech Pavlik
1902 */
1903/*
1904 * PIO 0-5, MWDMA 0-2 and UDMA 0-6 timings (in nanoseconds).
1905 * These were taken from ATA/ATAPI-6 standard, rev 0a, except
1906 * for PIO 5, which is a nonstandard extension and UDMA6, which
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05001907 * is currently supported only by Maxtor drives.
Alan Cox452503f2005-10-21 19:01:32 -04001908 */
1909
1910static const struct ata_timing ata_timing[] = {
1911
1912 { XFER_UDMA_6, 0, 0, 0, 0, 0, 0, 0, 15 },
1913 { XFER_UDMA_5, 0, 0, 0, 0, 0, 0, 0, 20 },
1914 { XFER_UDMA_4, 0, 0, 0, 0, 0, 0, 0, 30 },
1915 { XFER_UDMA_3, 0, 0, 0, 0, 0, 0, 0, 45 },
1916
1917 { XFER_UDMA_2, 0, 0, 0, 0, 0, 0, 0, 60 },
1918 { XFER_UDMA_1, 0, 0, 0, 0, 0, 0, 0, 80 },
1919 { XFER_UDMA_0, 0, 0, 0, 0, 0, 0, 0, 120 },
1920
1921/* { XFER_UDMA_SLOW, 0, 0, 0, 0, 0, 0, 0, 150 }, */
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05001922
Alan Cox452503f2005-10-21 19:01:32 -04001923 { XFER_MW_DMA_2, 25, 0, 0, 0, 70, 25, 120, 0 },
1924 { XFER_MW_DMA_1, 45, 0, 0, 0, 80, 50, 150, 0 },
1925 { XFER_MW_DMA_0, 60, 0, 0, 0, 215, 215, 480, 0 },
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05001926
Alan Cox452503f2005-10-21 19:01:32 -04001927 { XFER_SW_DMA_2, 60, 0, 0, 0, 120, 120, 240, 0 },
1928 { XFER_SW_DMA_1, 90, 0, 0, 0, 240, 240, 480, 0 },
1929 { XFER_SW_DMA_0, 120, 0, 0, 0, 480, 480, 960, 0 },
1930
1931/* { XFER_PIO_5, 20, 50, 30, 100, 50, 30, 100, 0 }, */
1932 { XFER_PIO_4, 25, 70, 25, 120, 70, 25, 120, 0 },
1933 { XFER_PIO_3, 30, 80, 70, 180, 80, 70, 180, 0 },
1934
1935 { XFER_PIO_2, 30, 290, 40, 330, 100, 90, 240, 0 },
1936 { XFER_PIO_1, 50, 290, 93, 383, 125, 100, 383, 0 },
1937 { XFER_PIO_0, 70, 290, 240, 600, 165, 150, 600, 0 },
1938
1939/* { XFER_PIO_SLOW, 120, 290, 240, 960, 290, 240, 960, 0 }, */
1940
1941 { 0xFF }
1942};
1943
1944#define ENOUGH(v,unit) (((v)-1)/(unit)+1)
1945#define EZ(v,unit) ((v)?ENOUGH(v,unit):0)
1946
1947static void ata_timing_quantize(const struct ata_timing *t, struct ata_timing *q, int T, int UT)
1948{
1949 q->setup = EZ(t->setup * 1000, T);
1950 q->act8b = EZ(t->act8b * 1000, T);
1951 q->rec8b = EZ(t->rec8b * 1000, T);
1952 q->cyc8b = EZ(t->cyc8b * 1000, T);
1953 q->active = EZ(t->active * 1000, T);
1954 q->recover = EZ(t->recover * 1000, T);
1955 q->cycle = EZ(t->cycle * 1000, T);
1956 q->udma = EZ(t->udma * 1000, UT);
1957}
1958
1959void ata_timing_merge(const struct ata_timing *a, const struct ata_timing *b,
1960 struct ata_timing *m, unsigned int what)
1961{
1962 if (what & ATA_TIMING_SETUP ) m->setup = max(a->setup, b->setup);
1963 if (what & ATA_TIMING_ACT8B ) m->act8b = max(a->act8b, b->act8b);
1964 if (what & ATA_TIMING_REC8B ) m->rec8b = max(a->rec8b, b->rec8b);
1965 if (what & ATA_TIMING_CYC8B ) m->cyc8b = max(a->cyc8b, b->cyc8b);
1966 if (what & ATA_TIMING_ACTIVE ) m->active = max(a->active, b->active);
1967 if (what & ATA_TIMING_RECOVER) m->recover = max(a->recover, b->recover);
1968 if (what & ATA_TIMING_CYCLE ) m->cycle = max(a->cycle, b->cycle);
1969 if (what & ATA_TIMING_UDMA ) m->udma = max(a->udma, b->udma);
1970}
1971
1972static const struct ata_timing* ata_timing_find_mode(unsigned short speed)
1973{
1974 const struct ata_timing *t;
1975
1976 for (t = ata_timing; t->mode != speed; t++)
Alan Cox91190752005-10-26 12:17:46 -04001977 if (t->mode == 0xFF)
Alan Cox452503f2005-10-21 19:01:32 -04001978 return NULL;
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05001979 return t;
Alan Cox452503f2005-10-21 19:01:32 -04001980}
1981
1982int ata_timing_compute(struct ata_device *adev, unsigned short speed,
1983 struct ata_timing *t, int T, int UT)
1984{
1985 const struct ata_timing *s;
1986 struct ata_timing p;
1987
1988 /*
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05001989 * Find the mode.
Albert Lee75b1f2f2005-11-16 17:06:18 +08001990 */
Alan Cox452503f2005-10-21 19:01:32 -04001991
1992 if (!(s = ata_timing_find_mode(speed)))
1993 return -EINVAL;
1994
Albert Lee75b1f2f2005-11-16 17:06:18 +08001995 memcpy(t, s, sizeof(*s));
1996
Alan Cox452503f2005-10-21 19:01:32 -04001997 /*
1998 * If the drive is an EIDE drive, it can tell us it needs extended
1999 * PIO/MW_DMA cycle timing.
2000 */
2001
2002 if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE drive */
2003 memset(&p, 0, sizeof(p));
2004 if(speed >= XFER_PIO_0 && speed <= XFER_SW_DMA_0) {
2005 if (speed <= XFER_PIO_2) p.cycle = p.cyc8b = adev->id[ATA_ID_EIDE_PIO];
2006 else p.cycle = p.cyc8b = adev->id[ATA_ID_EIDE_PIO_IORDY];
2007 } else if(speed >= XFER_MW_DMA_0 && speed <= XFER_MW_DMA_2) {
2008 p.cycle = adev->id[ATA_ID_EIDE_DMA_MIN];
2009 }
2010 ata_timing_merge(&p, t, t, ATA_TIMING_CYCLE | ATA_TIMING_CYC8B);
2011 }
2012
2013 /*
2014 * Convert the timing to bus clock counts.
2015 */
2016
Albert Lee75b1f2f2005-11-16 17:06:18 +08002017 ata_timing_quantize(t, t, T, UT);
Alan Cox452503f2005-10-21 19:01:32 -04002018
2019 /*
Randy Dunlapc893a3a2006-01-28 13:15:32 -05002020 * Even in DMA/UDMA modes we still use PIO access for IDENTIFY,
2021 * S.M.A.R.T * and some other commands. We have to ensure that the
2022 * DMA cycle timing is slower/equal than the fastest PIO timing.
Alan Cox452503f2005-10-21 19:01:32 -04002023 */
2024
2025 if (speed > XFER_PIO_4) {
2026 ata_timing_compute(adev, adev->pio_mode, &p, T, UT);
2027 ata_timing_merge(&p, t, t, ATA_TIMING_ALL);
2028 }
2029
2030 /*
Randy Dunlapc893a3a2006-01-28 13:15:32 -05002031 * Lengthen active & recovery time so that cycle time is correct.
Alan Cox452503f2005-10-21 19:01:32 -04002032 */
2033
2034 if (t->act8b + t->rec8b < t->cyc8b) {
2035 t->act8b += (t->cyc8b - (t->act8b + t->rec8b)) / 2;
2036 t->rec8b = t->cyc8b - t->act8b;
2037 }
2038
2039 if (t->active + t->recover < t->cycle) {
2040 t->active += (t->cycle - (t->active + t->recover)) / 2;
2041 t->recover = t->cycle - t->active;
2042 }
2043
2044 return 0;
2045}
2046
Tejun Heocf176e12006-04-02 17:54:46 +09002047/**
2048 * ata_down_xfermask_limit - adjust dev xfer masks downward
Tejun Heocf176e12006-04-02 17:54:46 +09002049 * @dev: Device to adjust xfer masks
2050 * @force_pio0: Force PIO0
2051 *
2052 * Adjust xfer masks of @dev downward. Note that this function
2053 * does not apply the change. Invoking ata_set_mode() afterwards
2054 * will apply the limit.
2055 *
2056 * LOCKING:
2057 * Inherited from caller.
2058 *
2059 * RETURNS:
2060 * 0 on success, negative errno on failure
2061 */
Tejun Heo3373efd2006-05-15 20:57:53 +09002062int ata_down_xfermask_limit(struct ata_device *dev, int force_pio0)
Tejun Heocf176e12006-04-02 17:54:46 +09002063{
2064 unsigned long xfer_mask;
2065 int highbit;
2066
2067 xfer_mask = ata_pack_xfermask(dev->pio_mask, dev->mwdma_mask,
2068 dev->udma_mask);
2069
2070 if (!xfer_mask)
2071 goto fail;
2072 /* don't gear down to MWDMA from UDMA, go directly to PIO */
2073 if (xfer_mask & ATA_MASK_UDMA)
2074 xfer_mask &= ~ATA_MASK_MWDMA;
2075
2076 highbit = fls(xfer_mask) - 1;
2077 xfer_mask &= ~(1 << highbit);
2078 if (force_pio0)
2079 xfer_mask &= 1 << ATA_SHIFT_PIO;
2080 if (!xfer_mask)
2081 goto fail;
2082
2083 ata_unpack_xfermask(xfer_mask, &dev->pio_mask, &dev->mwdma_mask,
2084 &dev->udma_mask);
2085
Tejun Heof15a1da2006-05-15 20:57:56 +09002086 ata_dev_printk(dev, KERN_WARNING, "limiting speed to %s\n",
2087 ata_mode_string(xfer_mask));
Tejun Heocf176e12006-04-02 17:54:46 +09002088
2089 return 0;
2090
2091 fail:
2092 return -EINVAL;
2093}
2094
Tejun Heo3373efd2006-05-15 20:57:53 +09002095static int ata_dev_set_mode(struct ata_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002096{
Tejun Heo83206a22006-03-24 15:25:31 +09002097 unsigned int err_mask;
2098 int rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002099
Tejun Heoe8384602006-04-02 18:51:53 +09002100 dev->flags &= ~ATA_DFLAG_PIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002101 if (dev->xfer_shift == ATA_SHIFT_PIO)
2102 dev->flags |= ATA_DFLAG_PIO;
2103
Tejun Heo3373efd2006-05-15 20:57:53 +09002104 err_mask = ata_dev_set_xfermode(dev);
Tejun Heo83206a22006-03-24 15:25:31 +09002105 if (err_mask) {
Tejun Heof15a1da2006-05-15 20:57:56 +09002106 ata_dev_printk(dev, KERN_ERR, "failed to set xfermode "
2107 "(err_mask=0x%x)\n", err_mask);
Tejun Heo83206a22006-03-24 15:25:31 +09002108 return -EIO;
2109 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002110
Tejun Heo3373efd2006-05-15 20:57:53 +09002111 rc = ata_dev_revalidate(dev, 0);
Tejun Heo5eb45c02006-04-02 18:51:52 +09002112 if (rc)
Tejun Heo83206a22006-03-24 15:25:31 +09002113 return rc;
Tejun Heo48a8a142006-03-05 17:55:58 +09002114
Tejun Heo23e71c32006-03-06 04:31:57 +09002115 DPRINTK("xfer_shift=%u, xfer_mode=0x%x\n",
2116 dev->xfer_shift, (int)dev->xfer_mode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002117
Tejun Heof15a1da2006-05-15 20:57:56 +09002118 ata_dev_printk(dev, KERN_INFO, "configured for %s\n",
2119 ata_mode_string(ata_xfer_mode2mask(dev->xfer_mode)));
Tejun Heo83206a22006-03-24 15:25:31 +09002120 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002121}
2122
Linus Torvalds1da177e2005-04-16 15:20:36 -07002123/**
2124 * ata_set_mode - Program timings and issue SET FEATURES - XFER
2125 * @ap: port on which timings will be programmed
Tejun Heoe82cbdb2006-04-01 01:38:18 +09002126 * @r_failed_dev: out paramter for failed device
Linus Torvalds1da177e2005-04-16 15:20:36 -07002127 *
Tejun Heoe82cbdb2006-04-01 01:38:18 +09002128 * Set ATA device disk transfer mode (PIO3, UDMA6, etc.). If
2129 * ata_set_mode() fails, pointer to the failing device is
2130 * returned in @r_failed_dev.
Jeff Garzik780a87f2005-05-30 15:41:05 -04002131 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07002132 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04002133 * PCI/etc. bus probe sem.
Tejun Heoe82cbdb2006-04-01 01:38:18 +09002134 *
2135 * RETURNS:
2136 * 0 on success, negative errno otherwise
Linus Torvalds1da177e2005-04-16 15:20:36 -07002137 */
Tejun Heo1ad8e7f2006-04-02 18:51:53 +09002138int ata_set_mode(struct ata_port *ap, struct ata_device **r_failed_dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002139{
Tejun Heoe8e06192006-04-01 01:38:18 +09002140 struct ata_device *dev;
Tejun Heoe82cbdb2006-04-01 01:38:18 +09002141 int i, rc = 0, used_dma = 0, found = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002142
Tejun Heo3adcebb2006-05-15 20:57:37 +09002143 /* has private set_mode? */
2144 if (ap->ops->set_mode) {
2145 /* FIXME: make ->set_mode handle no device case and
2146 * return error code and failing device on failure.
2147 */
2148 for (i = 0; i < ATA_MAX_DEVICES; i++) {
2149 if (ata_dev_enabled(&ap->device[i])) {
2150 ap->ops->set_mode(ap);
2151 break;
2152 }
2153 }
2154 return 0;
2155 }
2156
Tejun Heoa6d5a512006-03-06 04:31:57 +09002157 /* step 1: calculate xfer_mask */
2158 for (i = 0; i < ATA_MAX_DEVICES; i++) {
Tejun Heoacf356b2006-03-24 14:07:50 +09002159 unsigned int pio_mask, dma_mask;
Tejun Heoa6d5a512006-03-06 04:31:57 +09002160
Tejun Heoe8e06192006-04-01 01:38:18 +09002161 dev = &ap->device[i];
2162
Tejun Heoe1211e32006-04-01 01:38:18 +09002163 if (!ata_dev_enabled(dev))
Tejun Heoa6d5a512006-03-06 04:31:57 +09002164 continue;
2165
Tejun Heo3373efd2006-05-15 20:57:53 +09002166 ata_dev_xfermask(dev);
Tejun Heoa6d5a512006-03-06 04:31:57 +09002167
Tejun Heoacf356b2006-03-24 14:07:50 +09002168 pio_mask = ata_pack_xfermask(dev->pio_mask, 0, 0);
2169 dma_mask = ata_pack_xfermask(0, dev->mwdma_mask, dev->udma_mask);
2170 dev->pio_mode = ata_xfer_mask2mode(pio_mask);
2171 dev->dma_mode = ata_xfer_mask2mode(dma_mask);
Alan Cox5444a6f2006-03-27 18:58:20 +01002172
Tejun Heo4f659772006-04-01 01:38:18 +09002173 found = 1;
Alan Cox5444a6f2006-03-27 18:58:20 +01002174 if (dev->dma_mode)
2175 used_dma = 1;
Tejun Heoa6d5a512006-03-06 04:31:57 +09002176 }
Tejun Heo4f659772006-04-01 01:38:18 +09002177 if (!found)
Tejun Heoe82cbdb2006-04-01 01:38:18 +09002178 goto out;
Tejun Heoa6d5a512006-03-06 04:31:57 +09002179
2180 /* step 2: always set host PIO timings */
Tejun Heoe8e06192006-04-01 01:38:18 +09002181 for (i = 0; i < ATA_MAX_DEVICES; i++) {
2182 dev = &ap->device[i];
2183 if (!ata_dev_enabled(dev))
2184 continue;
2185
2186 if (!dev->pio_mode) {
Tejun Heof15a1da2006-05-15 20:57:56 +09002187 ata_dev_printk(dev, KERN_WARNING, "no PIO support\n");
Tejun Heoe8e06192006-04-01 01:38:18 +09002188 rc = -EINVAL;
Tejun Heoe82cbdb2006-04-01 01:38:18 +09002189 goto out;
Tejun Heoe8e06192006-04-01 01:38:18 +09002190 }
2191
2192 dev->xfer_mode = dev->pio_mode;
2193 dev->xfer_shift = ATA_SHIFT_PIO;
2194 if (ap->ops->set_piomode)
2195 ap->ops->set_piomode(ap, dev);
2196 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002197
Tejun Heoa6d5a512006-03-06 04:31:57 +09002198 /* step 3: set host DMA timings */
Tejun Heoe8e06192006-04-01 01:38:18 +09002199 for (i = 0; i < ATA_MAX_DEVICES; i++) {
2200 dev = &ap->device[i];
2201
2202 if (!ata_dev_enabled(dev) || !dev->dma_mode)
2203 continue;
2204
2205 dev->xfer_mode = dev->dma_mode;
2206 dev->xfer_shift = ata_xfer_mode2shift(dev->dma_mode);
2207 if (ap->ops->set_dmamode)
2208 ap->ops->set_dmamode(ap, dev);
2209 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002210
2211 /* step 4: update devices' xfer mode */
Tejun Heo83206a22006-03-24 15:25:31 +09002212 for (i = 0; i < ATA_MAX_DEVICES; i++) {
Tejun Heoe8e06192006-04-01 01:38:18 +09002213 dev = &ap->device[i];
Linus Torvalds1da177e2005-04-16 15:20:36 -07002214
Tejun Heoe1211e32006-04-01 01:38:18 +09002215 if (!ata_dev_enabled(dev))
Tejun Heo83206a22006-03-24 15:25:31 +09002216 continue;
2217
Tejun Heo3373efd2006-05-15 20:57:53 +09002218 rc = ata_dev_set_mode(dev);
Tejun Heo5bbc53f2006-04-01 01:38:17 +09002219 if (rc)
Tejun Heoe82cbdb2006-04-01 01:38:18 +09002220 goto out;
Tejun Heo83206a22006-03-24 15:25:31 +09002221 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002222
Tejun Heoe8e06192006-04-01 01:38:18 +09002223 /* Record simplex status. If we selected DMA then the other
2224 * host channels are not permitted to do so.
Alan Cox5444a6f2006-03-27 18:58:20 +01002225 */
Alan Cox5444a6f2006-03-27 18:58:20 +01002226 if (used_dma && (ap->host_set->flags & ATA_HOST_SIMPLEX))
2227 ap->host_set->simplex_claimed = 1;
2228
Tejun Heoe8e06192006-04-01 01:38:18 +09002229 /* step5: chip specific finalisation */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002230 if (ap->ops->post_set_mode)
2231 ap->ops->post_set_mode(ap);
2232
Tejun Heoe82cbdb2006-04-01 01:38:18 +09002233 out:
2234 if (rc)
2235 *r_failed_dev = dev;
2236 return rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002237}
2238
2239/**
Jeff Garzik1fdffbc2006-02-09 05:15:27 -05002240 * ata_tf_to_host - issue ATA taskfile to host controller
2241 * @ap: port to which command is being issued
2242 * @tf: ATA taskfile register set
2243 *
2244 * Issues ATA taskfile register set to ATA host controller,
2245 * with proper synchronization with interrupt handler and
2246 * other threads.
2247 *
2248 * LOCKING:
2249 * spin_lock_irqsave(host_set lock)
2250 */
2251
2252static inline void ata_tf_to_host(struct ata_port *ap,
2253 const struct ata_taskfile *tf)
2254{
2255 ap->ops->tf_load(ap, tf);
2256 ap->ops->exec_command(ap, tf);
2257}
2258
2259/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07002260 * ata_busy_sleep - sleep until BSY clears, or timeout
2261 * @ap: port containing status register to be polled
2262 * @tmout_pat: impatience timeout
2263 * @tmout: overall timeout
2264 *
Jeff Garzik780a87f2005-05-30 15:41:05 -04002265 * Sleep until ATA Status register bit BSY clears,
2266 * or a timeout occurs.
2267 *
2268 * LOCKING: None.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002269 */
2270
Tejun Heo6f8b9952006-01-24 17:05:21 +09002271unsigned int ata_busy_sleep (struct ata_port *ap,
2272 unsigned long tmout_pat, unsigned long tmout)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002273{
2274 unsigned long timer_start, timeout;
2275 u8 status;
2276
2277 status = ata_busy_wait(ap, ATA_BUSY, 300);
2278 timer_start = jiffies;
2279 timeout = timer_start + tmout_pat;
2280 while ((status & ATA_BUSY) && (time_before(jiffies, timeout))) {
2281 msleep(50);
2282 status = ata_busy_wait(ap, ATA_BUSY, 3);
2283 }
2284
2285 if (status & ATA_BUSY)
Tejun Heof15a1da2006-05-15 20:57:56 +09002286 ata_port_printk(ap, KERN_WARNING,
2287 "port is slow to respond, please be patient\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07002288
2289 timeout = timer_start + tmout;
2290 while ((status & ATA_BUSY) && (time_before(jiffies, timeout))) {
2291 msleep(50);
2292 status = ata_chk_status(ap);
2293 }
2294
2295 if (status & ATA_BUSY) {
Tejun Heof15a1da2006-05-15 20:57:56 +09002296 ata_port_printk(ap, KERN_ERR, "port failed to respond "
2297 "(%lu secs)\n", tmout / HZ);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002298 return 1;
2299 }
2300
2301 return 0;
2302}
2303
2304static void ata_bus_post_reset(struct ata_port *ap, unsigned int devmask)
2305{
2306 struct ata_ioports *ioaddr = &ap->ioaddr;
2307 unsigned int dev0 = devmask & (1 << 0);
2308 unsigned int dev1 = devmask & (1 << 1);
2309 unsigned long timeout;
2310
2311 /* if device 0 was found in ata_devchk, wait for its
2312 * BSY bit to clear
2313 */
2314 if (dev0)
2315 ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT);
2316
2317 /* if device 1 was found in ata_devchk, wait for
2318 * register access, then wait for BSY to clear
2319 */
2320 timeout = jiffies + ATA_TMOUT_BOOT;
2321 while (dev1) {
2322 u8 nsect, lbal;
2323
2324 ap->ops->dev_select(ap, 1);
2325 if (ap->flags & ATA_FLAG_MMIO) {
2326 nsect = readb((void __iomem *) ioaddr->nsect_addr);
2327 lbal = readb((void __iomem *) ioaddr->lbal_addr);
2328 } else {
2329 nsect = inb(ioaddr->nsect_addr);
2330 lbal = inb(ioaddr->lbal_addr);
2331 }
2332 if ((nsect == 1) && (lbal == 1))
2333 break;
2334 if (time_after(jiffies, timeout)) {
2335 dev1 = 0;
2336 break;
2337 }
2338 msleep(50); /* give drive a breather */
2339 }
2340 if (dev1)
2341 ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT);
2342
2343 /* is all this really necessary? */
2344 ap->ops->dev_select(ap, 0);
2345 if (dev1)
2346 ap->ops->dev_select(ap, 1);
2347 if (dev0)
2348 ap->ops->dev_select(ap, 0);
2349}
2350
Linus Torvalds1da177e2005-04-16 15:20:36 -07002351static unsigned int ata_bus_softreset(struct ata_port *ap,
2352 unsigned int devmask)
2353{
2354 struct ata_ioports *ioaddr = &ap->ioaddr;
2355
2356 DPRINTK("ata%u: bus reset via SRST\n", ap->id);
2357
2358 /* software reset. causes dev0 to be selected */
2359 if (ap->flags & ATA_FLAG_MMIO) {
2360 writeb(ap->ctl, (void __iomem *) ioaddr->ctl_addr);
2361 udelay(20); /* FIXME: flush */
2362 writeb(ap->ctl | ATA_SRST, (void __iomem *) ioaddr->ctl_addr);
2363 udelay(20); /* FIXME: flush */
2364 writeb(ap->ctl, (void __iomem *) ioaddr->ctl_addr);
2365 } else {
2366 outb(ap->ctl, ioaddr->ctl_addr);
2367 udelay(10);
2368 outb(ap->ctl | ATA_SRST, ioaddr->ctl_addr);
2369 udelay(10);
2370 outb(ap->ctl, ioaddr->ctl_addr);
2371 }
2372
2373 /* spec mandates ">= 2ms" before checking status.
2374 * We wait 150ms, because that was the magic delay used for
2375 * ATAPI devices in Hale Landis's ATADRVR, for the period of time
2376 * between when the ATA command register is written, and then
2377 * status is checked. Because waiting for "a while" before
2378 * checking status is fine, post SRST, we perform this magic
2379 * delay here as well.
Alan Cox09c7ad72006-03-22 15:52:40 +00002380 *
2381 * Old drivers/ide uses the 2mS rule and then waits for ready
Linus Torvalds1da177e2005-04-16 15:20:36 -07002382 */
2383 msleep(150);
2384
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05002385 /* Before we perform post reset processing we want to see if
Tejun Heo298a41c2006-03-25 02:58:13 +09002386 * the bus shows 0xFF because the odd clown forgets the D7
2387 * pulldown resistor.
2388 */
Tejun Heo987d2f02006-04-11 22:16:45 +09002389 if (ata_check_status(ap) == 0xFF) {
Tejun Heof15a1da2006-05-15 20:57:56 +09002390 ata_port_printk(ap, KERN_ERR, "SRST failed (status 0xFF)\n");
Tejun Heo298a41c2006-03-25 02:58:13 +09002391 return AC_ERR_OTHER;
Tejun Heo987d2f02006-04-11 22:16:45 +09002392 }
Alan Cox09c7ad72006-03-22 15:52:40 +00002393
Linus Torvalds1da177e2005-04-16 15:20:36 -07002394 ata_bus_post_reset(ap, devmask);
2395
2396 return 0;
2397}
2398
2399/**
2400 * ata_bus_reset - reset host port and associated ATA channel
2401 * @ap: port to reset
2402 *
2403 * This is typically the first time we actually start issuing
2404 * commands to the ATA channel. We wait for BSY to clear, then
2405 * issue EXECUTE DEVICE DIAGNOSTIC command, polling for its
2406 * result. Determine what devices, if any, are on the channel
2407 * by looking at the device 0/1 error register. Look at the signature
2408 * stored in each device's taskfile registers, to determine if
2409 * the device is ATA or ATAPI.
2410 *
2411 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04002412 * PCI/etc. bus probe sem.
2413 * Obtains host_set lock.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002414 *
2415 * SIDE EFFECTS:
Tejun Heo198e0fe2006-04-02 18:51:52 +09002416 * Sets ATA_FLAG_DISABLED if bus reset fails.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002417 */
2418
2419void ata_bus_reset(struct ata_port *ap)
2420{
2421 struct ata_ioports *ioaddr = &ap->ioaddr;
2422 unsigned int slave_possible = ap->flags & ATA_FLAG_SLAVE_POSS;
2423 u8 err;
Tejun Heoaec5c3c2006-03-25 01:33:34 +09002424 unsigned int dev0, dev1 = 0, devmask = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002425
2426 DPRINTK("ENTER, host %u, port %u\n", ap->id, ap->port_no);
2427
2428 /* determine if device 0/1 are present */
2429 if (ap->flags & ATA_FLAG_SATA_RESET)
2430 dev0 = 1;
2431 else {
2432 dev0 = ata_devchk(ap, 0);
2433 if (slave_possible)
2434 dev1 = ata_devchk(ap, 1);
2435 }
2436
2437 if (dev0)
2438 devmask |= (1 << 0);
2439 if (dev1)
2440 devmask |= (1 << 1);
2441
2442 /* select device 0 again */
2443 ap->ops->dev_select(ap, 0);
2444
2445 /* issue bus reset */
2446 if (ap->flags & ATA_FLAG_SRST)
Tejun Heoaec5c3c2006-03-25 01:33:34 +09002447 if (ata_bus_softreset(ap, devmask))
2448 goto err_out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002449
2450 /*
2451 * determine by signature whether we have ATA or ATAPI devices
2452 */
Tejun Heob4dc7622006-01-24 17:05:22 +09002453 ap->device[0].class = ata_dev_try_classify(ap, 0, &err);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002454 if ((slave_possible) && (err != 0x81))
Tejun Heob4dc7622006-01-24 17:05:22 +09002455 ap->device[1].class = ata_dev_try_classify(ap, 1, &err);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002456
2457 /* re-enable interrupts */
2458 if (ap->ioaddr.ctl_addr) /* FIXME: hack. create a hook instead */
2459 ata_irq_on(ap);
2460
2461 /* is double-select really necessary? */
2462 if (ap->device[1].class != ATA_DEV_NONE)
2463 ap->ops->dev_select(ap, 1);
2464 if (ap->device[0].class != ATA_DEV_NONE)
2465 ap->ops->dev_select(ap, 0);
2466
2467 /* if no devices were detected, disable this port */
2468 if ((ap->device[0].class == ATA_DEV_NONE) &&
2469 (ap->device[1].class == ATA_DEV_NONE))
2470 goto err_out;
2471
2472 if (ap->flags & (ATA_FLAG_SATA_RESET | ATA_FLAG_SRST)) {
2473 /* set up device control for ATA_FLAG_SATA_RESET */
2474 if (ap->flags & ATA_FLAG_MMIO)
2475 writeb(ap->ctl, (void __iomem *) ioaddr->ctl_addr);
2476 else
2477 outb(ap->ctl, ioaddr->ctl_addr);
2478 }
2479
2480 DPRINTK("EXIT\n");
2481 return;
2482
2483err_out:
Tejun Heof15a1da2006-05-15 20:57:56 +09002484 ata_port_printk(ap, KERN_ERR, "disabling port\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07002485 ap->ops->port_disable(ap);
2486
2487 DPRINTK("EXIT\n");
2488}
2489
Tejun Heod7bb4cc2006-05-31 18:27:46 +09002490/**
2491 * sata_phy_debounce - debounce SATA phy status
2492 * @ap: ATA port to debounce SATA phy status for
2493 * @params: timing parameters { interval, duratinon, timeout } in msec
2494 *
2495 * Make sure SStatus of @ap reaches stable state, determined by
2496 * holding the same value where DET is not 1 for @duration polled
2497 * every @interval, before @timeout. Timeout constraints the
2498 * beginning of the stable state. Because, after hot unplugging,
2499 * DET gets stuck at 1 on some controllers, this functions waits
2500 * until timeout then returns 0 if DET is stable at 1.
2501 *
2502 * LOCKING:
2503 * Kernel thread context (may sleep)
2504 *
2505 * RETURNS:
2506 * 0 on success, -errno on failure.
2507 */
2508int sata_phy_debounce(struct ata_port *ap, const unsigned long *params)
Tejun Heo7a7921e2006-02-02 18:20:00 +09002509{
Tejun Heod7bb4cc2006-05-31 18:27:46 +09002510 unsigned long interval_msec = params[0];
2511 unsigned long duration = params[1] * HZ / 1000;
2512 unsigned long timeout = jiffies + params[2] * HZ / 1000;
2513 unsigned long last_jiffies;
2514 u32 last, cur;
2515 int rc;
2516
2517 if ((rc = sata_scr_read(ap, SCR_STATUS, &cur)))
2518 return rc;
2519 cur &= 0xf;
2520
2521 last = cur;
2522 last_jiffies = jiffies;
2523
2524 while (1) {
2525 msleep(interval_msec);
2526 if ((rc = sata_scr_read(ap, SCR_STATUS, &cur)))
2527 return rc;
2528 cur &= 0xf;
2529
2530 /* DET stable? */
2531 if (cur == last) {
2532 if (cur == 1 && time_before(jiffies, timeout))
2533 continue;
2534 if (time_after(jiffies, last_jiffies + duration))
2535 return 0;
2536 continue;
2537 }
2538
2539 /* unstable, start over */
2540 last = cur;
2541 last_jiffies = jiffies;
2542
2543 /* check timeout */
2544 if (time_after(jiffies, timeout))
2545 return -EBUSY;
2546 }
2547}
2548
2549/**
2550 * sata_phy_resume - resume SATA phy
2551 * @ap: ATA port to resume SATA phy for
2552 * @params: timing parameters { interval, duratinon, timeout } in msec
2553 *
2554 * Resume SATA phy of @ap and debounce it.
2555 *
2556 * LOCKING:
2557 * Kernel thread context (may sleep)
2558 *
2559 * RETURNS:
2560 * 0 on success, -errno on failure.
2561 */
2562int sata_phy_resume(struct ata_port *ap, const unsigned long *params)
2563{
2564 u32 scontrol;
Tejun Heo81952c52006-05-15 20:57:47 +09002565 int rc;
Tejun Heo7a7921e2006-02-02 18:20:00 +09002566
Tejun Heo81952c52006-05-15 20:57:47 +09002567 if ((rc = sata_scr_read(ap, SCR_CONTROL, &scontrol)))
2568 return rc;
2569
Tejun Heo852ee162006-04-01 01:38:18 +09002570 scontrol = (scontrol & 0x0f0) | 0x300;
Tejun Heo81952c52006-05-15 20:57:47 +09002571
2572 if ((rc = sata_scr_write(ap, SCR_CONTROL, scontrol)))
2573 return rc;
Tejun Heo7a7921e2006-02-02 18:20:00 +09002574
Tejun Heod7bb4cc2006-05-31 18:27:46 +09002575 /* Some PHYs react badly if SStatus is pounded immediately
2576 * after resuming. Delay 200ms before debouncing.
2577 */
2578 msleep(200);
Tejun Heo7a7921e2006-02-02 18:20:00 +09002579
Tejun Heod7bb4cc2006-05-31 18:27:46 +09002580 return sata_phy_debounce(ap, params);
Tejun Heo7a7921e2006-02-02 18:20:00 +09002581}
2582
Tejun Heof5914a42006-05-31 18:27:48 +09002583static void ata_wait_spinup(struct ata_port *ap)
2584{
2585 struct ata_eh_context *ehc = &ap->eh_context;
2586 unsigned long end, secs;
2587 int rc;
2588
2589 /* first, debounce phy if SATA */
2590 if (ap->cbl == ATA_CBL_SATA) {
2591 rc = sata_phy_debounce(ap, sata_deb_timing_eh);
2592
2593 /* if debounced successfully and offline, no need to wait */
2594 if ((rc == 0 || rc == -EOPNOTSUPP) && ata_port_offline(ap))
2595 return;
2596 }
2597
2598 /* okay, let's give the drive time to spin up */
2599 end = ehc->i.hotplug_timestamp + ATA_SPINUP_WAIT * HZ / 1000;
2600 secs = ((end - jiffies) + HZ - 1) / HZ;
2601
2602 if (time_after(jiffies, end))
2603 return;
2604
2605 if (secs > 5)
2606 ata_port_printk(ap, KERN_INFO, "waiting for device to spin up "
2607 "(%lu secs)\n", secs);
2608
2609 schedule_timeout_uninterruptible(end - jiffies);
2610}
2611
2612/**
2613 * ata_std_prereset - prepare for reset
2614 * @ap: ATA port to be reset
2615 *
2616 * @ap is about to be reset. Initialize it.
2617 *
2618 * LOCKING:
2619 * Kernel thread context (may sleep)
2620 *
2621 * RETURNS:
2622 * 0 on success, -errno otherwise.
2623 */
2624int ata_std_prereset(struct ata_port *ap)
2625{
2626 struct ata_eh_context *ehc = &ap->eh_context;
2627 const unsigned long *timing;
2628 int rc;
2629
2630 /* hotplug? */
2631 if (ehc->i.flags & ATA_EHI_HOTPLUGGED) {
2632 if (ap->flags & ATA_FLAG_HRST_TO_RESUME)
2633 ehc->i.action |= ATA_EH_HARDRESET;
2634 if (ap->flags & ATA_FLAG_SKIP_D2H_BSY)
2635 ata_wait_spinup(ap);
2636 }
2637
2638 /* if we're about to do hardreset, nothing more to do */
2639 if (ehc->i.action & ATA_EH_HARDRESET)
2640 return 0;
2641
2642 /* if SATA, resume phy */
2643 if (ap->cbl == ATA_CBL_SATA) {
2644 if (ap->flags & ATA_FLAG_LOADING)
2645 timing = sata_deb_timing_boot;
2646 else
2647 timing = sata_deb_timing_eh;
2648
2649 rc = sata_phy_resume(ap, timing);
2650 if (rc && rc != -EOPNOTSUPP) {
2651 /* phy resume failed */
2652 ata_port_printk(ap, KERN_WARNING, "failed to resume "
2653 "link for reset (errno=%d)\n", rc);
2654 return rc;
2655 }
2656 }
2657
2658 /* Wait for !BSY if the controller can wait for the first D2H
2659 * Reg FIS and we don't know that no device is attached.
2660 */
2661 if (!(ap->flags & ATA_FLAG_SKIP_D2H_BSY) && !ata_port_offline(ap))
2662 ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT);
2663
2664 return 0;
2665}
2666
Tejun Heoc2bd5802006-01-24 17:05:22 +09002667/**
2668 * ata_std_softreset - reset host port via ATA SRST
2669 * @ap: port to reset
Tejun Heoc2bd5802006-01-24 17:05:22 +09002670 * @classes: resulting classes of attached devices
2671 *
Tejun Heo52783c52006-05-31 18:28:22 +09002672 * Reset host port using ATA SRST.
Tejun Heoc2bd5802006-01-24 17:05:22 +09002673 *
2674 * LOCKING:
2675 * Kernel thread context (may sleep)
2676 *
2677 * RETURNS:
2678 * 0 on success, -errno otherwise.
2679 */
Tejun Heo2bf2cb22006-04-11 22:16:45 +09002680int ata_std_softreset(struct ata_port *ap, unsigned int *classes)
Tejun Heoc2bd5802006-01-24 17:05:22 +09002681{
2682 unsigned int slave_possible = ap->flags & ATA_FLAG_SLAVE_POSS;
2683 unsigned int devmask = 0, err_mask;
2684 u8 err;
2685
2686 DPRINTK("ENTER\n");
2687
Tejun Heo81952c52006-05-15 20:57:47 +09002688 if (ata_port_offline(ap)) {
Tejun Heo3a397462006-02-10 23:58:48 +09002689 classes[0] = ATA_DEV_NONE;
2690 goto out;
2691 }
2692
Tejun Heoc2bd5802006-01-24 17:05:22 +09002693 /* determine if device 0/1 are present */
2694 if (ata_devchk(ap, 0))
2695 devmask |= (1 << 0);
2696 if (slave_possible && ata_devchk(ap, 1))
2697 devmask |= (1 << 1);
2698
Tejun Heoc2bd5802006-01-24 17:05:22 +09002699 /* select device 0 again */
2700 ap->ops->dev_select(ap, 0);
2701
2702 /* issue bus reset */
2703 DPRINTK("about to softreset, devmask=%x\n", devmask);
2704 err_mask = ata_bus_softreset(ap, devmask);
2705 if (err_mask) {
Tejun Heof15a1da2006-05-15 20:57:56 +09002706 ata_port_printk(ap, KERN_ERR, "SRST failed (err_mask=0x%x)\n",
2707 err_mask);
Tejun Heoc2bd5802006-01-24 17:05:22 +09002708 return -EIO;
2709 }
2710
2711 /* determine by signature whether we have ATA or ATAPI devices */
2712 classes[0] = ata_dev_try_classify(ap, 0, &err);
2713 if (slave_possible && err != 0x81)
2714 classes[1] = ata_dev_try_classify(ap, 1, &err);
2715
Tejun Heo3a397462006-02-10 23:58:48 +09002716 out:
Tejun Heoc2bd5802006-01-24 17:05:22 +09002717 DPRINTK("EXIT, classes[0]=%u [1]=%u\n", classes[0], classes[1]);
2718 return 0;
2719}
2720
2721/**
2722 * sata_std_hardreset - reset host port via SATA phy reset
2723 * @ap: port to reset
Tejun Heoc2bd5802006-01-24 17:05:22 +09002724 * @class: resulting class of attached device
2725 *
2726 * SATA phy-reset host port using DET bits of SControl register.
Tejun Heoc2bd5802006-01-24 17:05:22 +09002727 *
2728 * LOCKING:
2729 * Kernel thread context (may sleep)
2730 *
2731 * RETURNS:
2732 * 0 on success, -errno otherwise.
2733 */
Tejun Heo2bf2cb22006-04-11 22:16:45 +09002734int sata_std_hardreset(struct ata_port *ap, unsigned int *class)
Tejun Heoc2bd5802006-01-24 17:05:22 +09002735{
Tejun Heo852ee162006-04-01 01:38:18 +09002736 u32 scontrol;
Tejun Heo81952c52006-05-15 20:57:47 +09002737 int rc;
Tejun Heo852ee162006-04-01 01:38:18 +09002738
Tejun Heoc2bd5802006-01-24 17:05:22 +09002739 DPRINTK("ENTER\n");
2740
Tejun Heo3c567b72006-05-15 20:57:23 +09002741 if (sata_set_spd_needed(ap)) {
Tejun Heo1c3fae42006-04-02 20:53:28 +09002742 /* SATA spec says nothing about how to reconfigure
2743 * spd. To be on the safe side, turn off phy during
2744 * reconfiguration. This works for at least ICH7 AHCI
2745 * and Sil3124.
2746 */
Tejun Heo81952c52006-05-15 20:57:47 +09002747 if ((rc = sata_scr_read(ap, SCR_CONTROL, &scontrol)))
2748 return rc;
2749
Tejun Heo1c3fae42006-04-02 20:53:28 +09002750 scontrol = (scontrol & 0x0f0) | 0x302;
Tejun Heo81952c52006-05-15 20:57:47 +09002751
2752 if ((rc = sata_scr_write(ap, SCR_CONTROL, scontrol)))
2753 return rc;
Tejun Heo1c3fae42006-04-02 20:53:28 +09002754
Tejun Heo3c567b72006-05-15 20:57:23 +09002755 sata_set_spd(ap);
Tejun Heo1c3fae42006-04-02 20:53:28 +09002756 }
2757
2758 /* issue phy wake/reset */
Tejun Heo81952c52006-05-15 20:57:47 +09002759 if ((rc = sata_scr_read(ap, SCR_CONTROL, &scontrol)))
2760 return rc;
2761
Tejun Heo852ee162006-04-01 01:38:18 +09002762 scontrol = (scontrol & 0x0f0) | 0x301;
Tejun Heo81952c52006-05-15 20:57:47 +09002763
2764 if ((rc = sata_scr_write_flush(ap, SCR_CONTROL, scontrol)))
2765 return rc;
Tejun Heoc2bd5802006-01-24 17:05:22 +09002766
Tejun Heo1c3fae42006-04-02 20:53:28 +09002767 /* Couldn't find anything in SATA I/II specs, but AHCI-1.1
Tejun Heoc2bd5802006-01-24 17:05:22 +09002768 * 10.4.2 says at least 1 ms.
2769 */
2770 msleep(1);
2771
Tejun Heo1c3fae42006-04-02 20:53:28 +09002772 /* bring phy back */
Tejun Heod7bb4cc2006-05-31 18:27:46 +09002773 sata_phy_resume(ap, sata_deb_timing_eh);
Tejun Heoc2bd5802006-01-24 17:05:22 +09002774
Tejun Heoc2bd5802006-01-24 17:05:22 +09002775 /* TODO: phy layer with polling, timeouts, etc. */
Tejun Heo81952c52006-05-15 20:57:47 +09002776 if (ata_port_offline(ap)) {
Tejun Heoc2bd5802006-01-24 17:05:22 +09002777 *class = ATA_DEV_NONE;
2778 DPRINTK("EXIT, link offline\n");
2779 return 0;
2780 }
2781
2782 if (ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT)) {
Tejun Heof15a1da2006-05-15 20:57:56 +09002783 ata_port_printk(ap, KERN_ERR,
2784 "COMRESET failed (device not ready)\n");
Tejun Heoc2bd5802006-01-24 17:05:22 +09002785 return -EIO;
2786 }
2787
Tejun Heo3a397462006-02-10 23:58:48 +09002788 ap->ops->dev_select(ap, 0); /* probably unnecessary */
2789
Tejun Heoc2bd5802006-01-24 17:05:22 +09002790 *class = ata_dev_try_classify(ap, 0, NULL);
2791
2792 DPRINTK("EXIT, class=%u\n", *class);
2793 return 0;
2794}
2795
2796/**
2797 * ata_std_postreset - standard postreset callback
2798 * @ap: the target ata_port
2799 * @classes: classes of attached devices
2800 *
2801 * This function is invoked after a successful reset. Note that
2802 * the device might have been reset more than once using
2803 * different reset methods before postreset is invoked.
Tejun Heoc2bd5802006-01-24 17:05:22 +09002804 *
Tejun Heoc2bd5802006-01-24 17:05:22 +09002805 * LOCKING:
2806 * Kernel thread context (may sleep)
2807 */
2808void ata_std_postreset(struct ata_port *ap, unsigned int *classes)
2809{
Tejun Heodc2b3512006-05-15 20:58:00 +09002810 u32 serror;
2811
Tejun Heoc2bd5802006-01-24 17:05:22 +09002812 DPRINTK("ENTER\n");
2813
Tejun Heoc2bd5802006-01-24 17:05:22 +09002814 /* print link status */
Tejun Heo81952c52006-05-15 20:57:47 +09002815 sata_print_link_status(ap);
Tejun Heoc2bd5802006-01-24 17:05:22 +09002816
Tejun Heodc2b3512006-05-15 20:58:00 +09002817 /* clear SError */
2818 if (sata_scr_read(ap, SCR_ERROR, &serror) == 0)
2819 sata_scr_write(ap, SCR_ERROR, serror);
2820
Tejun Heo3a397462006-02-10 23:58:48 +09002821 /* re-enable interrupts */
Tejun Heoe3180492006-05-15 20:58:09 +09002822 if (!ap->ops->error_handler) {
2823 /* FIXME: hack. create a hook instead */
2824 if (ap->ioaddr.ctl_addr)
2825 ata_irq_on(ap);
2826 }
Tejun Heoc2bd5802006-01-24 17:05:22 +09002827
2828 /* is double-select really necessary? */
2829 if (classes[0] != ATA_DEV_NONE)
2830 ap->ops->dev_select(ap, 1);
2831 if (classes[1] != ATA_DEV_NONE)
2832 ap->ops->dev_select(ap, 0);
2833
Tejun Heo3a397462006-02-10 23:58:48 +09002834 /* bail out if no device is present */
2835 if (classes[0] == ATA_DEV_NONE && classes[1] == ATA_DEV_NONE) {
2836 DPRINTK("EXIT, no device\n");
2837 return;
2838 }
2839
2840 /* set up device control */
2841 if (ap->ioaddr.ctl_addr) {
2842 if (ap->flags & ATA_FLAG_MMIO)
2843 writeb(ap->ctl, (void __iomem *) ap->ioaddr.ctl_addr);
2844 else
2845 outb(ap->ctl, ap->ioaddr.ctl_addr);
2846 }
Tejun Heoc2bd5802006-01-24 17:05:22 +09002847
2848 DPRINTK("EXIT\n");
2849}
2850
Tejun Heoa62c0fc2006-01-24 17:05:22 +09002851/**
Tejun Heo623a3122006-03-05 17:55:58 +09002852 * ata_dev_same_device - Determine whether new ID matches configured device
Tejun Heo623a3122006-03-05 17:55:58 +09002853 * @dev: device to compare against
2854 * @new_class: class of the new device
2855 * @new_id: IDENTIFY page of the new device
2856 *
2857 * Compare @new_class and @new_id against @dev and determine
2858 * whether @dev is the device indicated by @new_class and
2859 * @new_id.
2860 *
2861 * LOCKING:
2862 * None.
2863 *
2864 * RETURNS:
2865 * 1 if @dev matches @new_class and @new_id, 0 otherwise.
2866 */
Tejun Heo3373efd2006-05-15 20:57:53 +09002867static int ata_dev_same_device(struct ata_device *dev, unsigned int new_class,
2868 const u16 *new_id)
Tejun Heo623a3122006-03-05 17:55:58 +09002869{
2870 const u16 *old_id = dev->id;
2871 unsigned char model[2][41], serial[2][21];
2872 u64 new_n_sectors;
2873
2874 if (dev->class != new_class) {
Tejun Heof15a1da2006-05-15 20:57:56 +09002875 ata_dev_printk(dev, KERN_INFO, "class mismatch %d != %d\n",
2876 dev->class, new_class);
Tejun Heo623a3122006-03-05 17:55:58 +09002877 return 0;
2878 }
2879
2880 ata_id_c_string(old_id, model[0], ATA_ID_PROD_OFS, sizeof(model[0]));
2881 ata_id_c_string(new_id, model[1], ATA_ID_PROD_OFS, sizeof(model[1]));
2882 ata_id_c_string(old_id, serial[0], ATA_ID_SERNO_OFS, sizeof(serial[0]));
2883 ata_id_c_string(new_id, serial[1], ATA_ID_SERNO_OFS, sizeof(serial[1]));
2884 new_n_sectors = ata_id_n_sectors(new_id);
2885
2886 if (strcmp(model[0], model[1])) {
Tejun Heof15a1da2006-05-15 20:57:56 +09002887 ata_dev_printk(dev, KERN_INFO, "model number mismatch "
2888 "'%s' != '%s'\n", model[0], model[1]);
Tejun Heo623a3122006-03-05 17:55:58 +09002889 return 0;
2890 }
2891
2892 if (strcmp(serial[0], serial[1])) {
Tejun Heof15a1da2006-05-15 20:57:56 +09002893 ata_dev_printk(dev, KERN_INFO, "serial number mismatch "
2894 "'%s' != '%s'\n", serial[0], serial[1]);
Tejun Heo623a3122006-03-05 17:55:58 +09002895 return 0;
2896 }
2897
2898 if (dev->class == ATA_DEV_ATA && dev->n_sectors != new_n_sectors) {
Tejun Heof15a1da2006-05-15 20:57:56 +09002899 ata_dev_printk(dev, KERN_INFO, "n_sectors mismatch "
2900 "%llu != %llu\n",
2901 (unsigned long long)dev->n_sectors,
2902 (unsigned long long)new_n_sectors);
Tejun Heo623a3122006-03-05 17:55:58 +09002903 return 0;
2904 }
2905
2906 return 1;
2907}
2908
2909/**
2910 * ata_dev_revalidate - Revalidate ATA device
Tejun Heo623a3122006-03-05 17:55:58 +09002911 * @dev: device to revalidate
2912 * @post_reset: is this revalidation after reset?
2913 *
2914 * Re-read IDENTIFY page and make sure @dev is still attached to
2915 * the port.
2916 *
2917 * LOCKING:
2918 * Kernel thread context (may sleep)
2919 *
2920 * RETURNS:
2921 * 0 on success, negative errno otherwise
2922 */
Tejun Heo3373efd2006-05-15 20:57:53 +09002923int ata_dev_revalidate(struct ata_device *dev, int post_reset)
Tejun Heo623a3122006-03-05 17:55:58 +09002924{
Tejun Heo5eb45c02006-04-02 18:51:52 +09002925 unsigned int class = dev->class;
Tejun Heof15a1da2006-05-15 20:57:56 +09002926 u16 *id = (void *)dev->ap->sector_buf;
Tejun Heo623a3122006-03-05 17:55:58 +09002927 int rc;
2928
Tejun Heo5eb45c02006-04-02 18:51:52 +09002929 if (!ata_dev_enabled(dev)) {
2930 rc = -ENODEV;
2931 goto fail;
2932 }
Tejun Heo623a3122006-03-05 17:55:58 +09002933
Tejun Heofe635c72006-05-15 20:57:35 +09002934 /* read ID data */
Tejun Heo3373efd2006-05-15 20:57:53 +09002935 rc = ata_dev_read_id(dev, &class, post_reset, id);
Tejun Heo623a3122006-03-05 17:55:58 +09002936 if (rc)
2937 goto fail;
2938
2939 /* is the device still there? */
Tejun Heo3373efd2006-05-15 20:57:53 +09002940 if (!ata_dev_same_device(dev, class, id)) {
Tejun Heo623a3122006-03-05 17:55:58 +09002941 rc = -ENODEV;
2942 goto fail;
2943 }
2944
Tejun Heofe635c72006-05-15 20:57:35 +09002945 memcpy(dev->id, id, sizeof(id[0]) * ATA_ID_WORDS);
Tejun Heo623a3122006-03-05 17:55:58 +09002946
2947 /* configure device according to the new ID */
Tejun Heo3373efd2006-05-15 20:57:53 +09002948 rc = ata_dev_configure(dev, 0);
Tejun Heo5eb45c02006-04-02 18:51:52 +09002949 if (rc == 0)
2950 return 0;
Tejun Heo623a3122006-03-05 17:55:58 +09002951
2952 fail:
Tejun Heof15a1da2006-05-15 20:57:56 +09002953 ata_dev_printk(dev, KERN_ERR, "revalidation failed (errno=%d)\n", rc);
Tejun Heo623a3122006-03-05 17:55:58 +09002954 return rc;
2955}
2956
Arjan van de Ven98ac62d2005-11-28 10:06:23 +01002957static const char * const ata_dma_blacklist [] = {
Alan Coxf4b15fe2006-03-22 15:54:04 +00002958 "WDC AC11000H", NULL,
2959 "WDC AC22100H", NULL,
2960 "WDC AC32500H", NULL,
2961 "WDC AC33100H", NULL,
2962 "WDC AC31600H", NULL,
2963 "WDC AC32100H", "24.09P07",
2964 "WDC AC23200L", "21.10N21",
2965 "Compaq CRD-8241B", NULL,
2966 "CRD-8400B", NULL,
2967 "CRD-8480B", NULL,
2968 "CRD-8482B", NULL,
2969 "CRD-84", NULL,
2970 "SanDisk SDP3B", NULL,
2971 "SanDisk SDP3B-64", NULL,
2972 "SANYO CD-ROM CRD", NULL,
2973 "HITACHI CDR-8", NULL,
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05002974 "HITACHI CDR-8335", NULL,
Alan Coxf4b15fe2006-03-22 15:54:04 +00002975 "HITACHI CDR-8435", NULL,
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05002976 "Toshiba CD-ROM XM-6202B", NULL,
2977 "TOSHIBA CD-ROM XM-1702BC", NULL,
2978 "CD-532E-A", NULL,
2979 "E-IDE CD-ROM CR-840", NULL,
2980 "CD-ROM Drive/F5A", NULL,
2981 "WPI CDD-820", NULL,
Alan Coxf4b15fe2006-03-22 15:54:04 +00002982 "SAMSUNG CD-ROM SC-148C", NULL,
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05002983 "SAMSUNG CD-ROM SC", NULL,
Alan Coxf4b15fe2006-03-22 15:54:04 +00002984 "SanDisk SDP3B-64", NULL,
2985 "ATAPI CD-ROM DRIVE 40X MAXIMUM",NULL,
2986 "_NEC DV5800A", NULL,
2987 "SAMSUNG CD-ROM SN-124", "N001"
Linus Torvalds1da177e2005-04-16 15:20:36 -07002988};
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05002989
Alan Coxf4b15fe2006-03-22 15:54:04 +00002990static int ata_strim(char *s, size_t len)
2991{
2992 len = strnlen(s, len);
2993
2994 /* ATAPI specifies that empty space is blank-filled; remove blanks */
2995 while ((len > 0) && (s[len - 1] == ' ')) {
2996 len--;
2997 s[len] = 0;
2998 }
2999 return len;
3000}
Linus Torvalds1da177e2005-04-16 15:20:36 -07003001
Jeff Garzik057ace52005-10-22 14:27:05 -04003002static int ata_dma_blacklisted(const struct ata_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003003{
Alan Coxf4b15fe2006-03-22 15:54:04 +00003004 unsigned char model_num[40];
3005 unsigned char model_rev[16];
3006 unsigned int nlen, rlen;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003007 int i;
3008
Albert Lee3a778272006-06-22 13:00:25 +08003009 /* We don't support polling DMA.
3010 * DMA blacklist those ATAPI devices with CDB-intr (and use PIO)
3011 * if the LLDD handles only interrupts in the HSM_ST_LAST state.
3012 */
3013 if ((dev->ap->flags & ATA_FLAG_PIO_POLLING) &&
3014 (dev->flags & ATA_DFLAG_CDB_INTR))
3015 return 1;
3016
Alan Coxf4b15fe2006-03-22 15:54:04 +00003017 ata_id_string(dev->id, model_num, ATA_ID_PROD_OFS,
3018 sizeof(model_num));
3019 ata_id_string(dev->id, model_rev, ATA_ID_FW_REV_OFS,
3020 sizeof(model_rev));
3021 nlen = ata_strim(model_num, sizeof(model_num));
3022 rlen = ata_strim(model_rev, sizeof(model_rev));
Linus Torvalds1da177e2005-04-16 15:20:36 -07003023
Alan Coxf4b15fe2006-03-22 15:54:04 +00003024 for (i = 0; i < ARRAY_SIZE(ata_dma_blacklist); i += 2) {
3025 if (!strncmp(ata_dma_blacklist[i], model_num, nlen)) {
3026 if (ata_dma_blacklist[i+1] == NULL)
3027 return 1;
3028 if (!strncmp(ata_dma_blacklist[i], model_rev, rlen))
3029 return 1;
3030 }
3031 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003032 return 0;
3033}
3034
Tejun Heoa6d5a512006-03-06 04:31:57 +09003035/**
3036 * ata_dev_xfermask - Compute supported xfermask of the given device
Tejun Heoa6d5a512006-03-06 04:31:57 +09003037 * @dev: Device to compute xfermask for
3038 *
Tejun Heoacf356b2006-03-24 14:07:50 +09003039 * Compute supported xfermask of @dev and store it in
3040 * dev->*_mask. This function is responsible for applying all
3041 * known limits including host controller limits, device
3042 * blacklist, etc...
Tejun Heoa6d5a512006-03-06 04:31:57 +09003043 *
Tejun Heo600511e2006-03-25 11:14:07 +09003044 * FIXME: The current implementation limits all transfer modes to
3045 * the fastest of the lowested device on the port. This is not
Tejun Heo05c8e0a2006-03-25 14:28:57 +09003046 * required on most controllers.
Tejun Heo600511e2006-03-25 11:14:07 +09003047 *
Tejun Heoa6d5a512006-03-06 04:31:57 +09003048 * LOCKING:
3049 * None.
Tejun Heoa6d5a512006-03-06 04:31:57 +09003050 */
Tejun Heo3373efd2006-05-15 20:57:53 +09003051static void ata_dev_xfermask(struct ata_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003052{
Tejun Heo3373efd2006-05-15 20:57:53 +09003053 struct ata_port *ap = dev->ap;
Alan Cox5444a6f2006-03-27 18:58:20 +01003054 struct ata_host_set *hs = ap->host_set;
Tejun Heoa6d5a512006-03-06 04:31:57 +09003055 unsigned long xfer_mask;
3056 int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003057
Tejun Heo565083e2006-04-02 17:54:47 +09003058 xfer_mask = ata_pack_xfermask(ap->pio_mask,
3059 ap->mwdma_mask, ap->udma_mask);
3060
3061 /* Apply cable rule here. Don't apply it early because when
3062 * we handle hot plug the cable type can itself change.
3063 */
3064 if (ap->cbl == ATA_CBL_PATA40)
3065 xfer_mask &= ~(0xF8 << ATA_SHIFT_UDMA);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003066
Alan Cox5444a6f2006-03-27 18:58:20 +01003067 /* FIXME: Use port-wide xfermask for now */
Tejun Heoa6d5a512006-03-06 04:31:57 +09003068 for (i = 0; i < ATA_MAX_DEVICES; i++) {
3069 struct ata_device *d = &ap->device[i];
Tejun Heo565083e2006-04-02 17:54:47 +09003070
3071 if (ata_dev_absent(d))
Tejun Heoa6d5a512006-03-06 04:31:57 +09003072 continue;
Tejun Heo565083e2006-04-02 17:54:47 +09003073
3074 if (ata_dev_disabled(d)) {
3075 /* to avoid violating device selection timing */
3076 xfer_mask &= ata_pack_xfermask(d->pio_mask,
3077 UINT_MAX, UINT_MAX);
3078 continue;
3079 }
3080
3081 xfer_mask &= ata_pack_xfermask(d->pio_mask,
3082 d->mwdma_mask, d->udma_mask);
Tejun Heoa6d5a512006-03-06 04:31:57 +09003083 xfer_mask &= ata_id_xfermask(d->id);
3084 if (ata_dma_blacklisted(d))
3085 xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003086 }
3087
Tejun Heoa6d5a512006-03-06 04:31:57 +09003088 if (ata_dma_blacklisted(dev))
Tejun Heof15a1da2006-05-15 20:57:56 +09003089 ata_dev_printk(dev, KERN_WARNING,
3090 "device is on DMA blacklist, disabling DMA\n");
Tejun Heoa6d5a512006-03-06 04:31:57 +09003091
Alan Cox5444a6f2006-03-27 18:58:20 +01003092 if (hs->flags & ATA_HOST_SIMPLEX) {
3093 if (hs->simplex_claimed)
3094 xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA);
3095 }
Tejun Heo565083e2006-04-02 17:54:47 +09003096
Alan Cox5444a6f2006-03-27 18:58:20 +01003097 if (ap->ops->mode_filter)
3098 xfer_mask = ap->ops->mode_filter(ap, dev, xfer_mask);
3099
Tejun Heo565083e2006-04-02 17:54:47 +09003100 ata_unpack_xfermask(xfer_mask, &dev->pio_mask,
3101 &dev->mwdma_mask, &dev->udma_mask);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003102}
3103
Linus Torvalds1da177e2005-04-16 15:20:36 -07003104/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07003105 * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command
Linus Torvalds1da177e2005-04-16 15:20:36 -07003106 * @dev: Device to which command will be sent
3107 *
Jeff Garzik780a87f2005-05-30 15:41:05 -04003108 * Issue SET FEATURES - XFER MODE command to device @dev
3109 * on port @ap.
3110 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07003111 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04003112 * PCI/etc. bus probe sem.
Tejun Heo83206a22006-03-24 15:25:31 +09003113 *
3114 * RETURNS:
3115 * 0 on success, AC_ERR_* mask otherwise.
Linus Torvalds1da177e2005-04-16 15:20:36 -07003116 */
3117
Tejun Heo3373efd2006-05-15 20:57:53 +09003118static unsigned int ata_dev_set_xfermode(struct ata_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003119{
Tejun Heoa0123702005-12-13 14:49:31 +09003120 struct ata_taskfile tf;
Tejun Heo83206a22006-03-24 15:25:31 +09003121 unsigned int err_mask;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003122
3123 /* set up set-features taskfile */
3124 DPRINTK("set features - xfer mode\n");
3125
Tejun Heo3373efd2006-05-15 20:57:53 +09003126 ata_tf_init(dev, &tf);
Tejun Heoa0123702005-12-13 14:49:31 +09003127 tf.command = ATA_CMD_SET_FEATURES;
3128 tf.feature = SETFEATURES_XFER;
3129 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
3130 tf.protocol = ATA_PROT_NODATA;
3131 tf.nsect = dev->xfer_mode;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003132
Tejun Heo3373efd2006-05-15 20:57:53 +09003133 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003134
Tejun Heo83206a22006-03-24 15:25:31 +09003135 DPRINTK("EXIT, err_mask=%x\n", err_mask);
3136 return err_mask;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003137}
3138
3139/**
Albert Lee8bf62ece2005-05-12 15:29:42 -04003140 * ata_dev_init_params - Issue INIT DEV PARAMS command
Albert Lee8bf62ece2005-05-12 15:29:42 -04003141 * @dev: Device to which command will be sent
Randy Dunlape2a7f772006-05-18 10:50:18 -07003142 * @heads: Number of heads (taskfile parameter)
3143 * @sectors: Number of sectors (taskfile parameter)
Albert Lee8bf62ece2005-05-12 15:29:42 -04003144 *
3145 * LOCKING:
Tejun Heo6aff8f12006-02-15 18:24:09 +09003146 * Kernel thread context (may sleep)
3147 *
3148 * RETURNS:
3149 * 0 on success, AC_ERR_* mask otherwise.
Albert Lee8bf62ece2005-05-12 15:29:42 -04003150 */
Tejun Heo3373efd2006-05-15 20:57:53 +09003151static unsigned int ata_dev_init_params(struct ata_device *dev,
3152 u16 heads, u16 sectors)
Albert Lee8bf62ece2005-05-12 15:29:42 -04003153{
Tejun Heoa0123702005-12-13 14:49:31 +09003154 struct ata_taskfile tf;
Tejun Heo6aff8f12006-02-15 18:24:09 +09003155 unsigned int err_mask;
Albert Lee8bf62ece2005-05-12 15:29:42 -04003156
3157 /* Number of sectors per track 1-255. Number of heads 1-16 */
3158 if (sectors < 1 || sectors > 255 || heads < 1 || heads > 16)
Albert Lee00b6f5e2006-03-27 16:39:18 +08003159 return AC_ERR_INVALID;
Albert Lee8bf62ece2005-05-12 15:29:42 -04003160
3161 /* set up init dev params taskfile */
3162 DPRINTK("init dev params \n");
3163
Tejun Heo3373efd2006-05-15 20:57:53 +09003164 ata_tf_init(dev, &tf);
Tejun Heoa0123702005-12-13 14:49:31 +09003165 tf.command = ATA_CMD_INIT_DEV_PARAMS;
3166 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
3167 tf.protocol = ATA_PROT_NODATA;
3168 tf.nsect = sectors;
3169 tf.device |= (heads - 1) & 0x0f; /* max head = num. of heads - 1 */
Albert Lee8bf62ece2005-05-12 15:29:42 -04003170
Tejun Heo3373efd2006-05-15 20:57:53 +09003171 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0);
Albert Lee8bf62ece2005-05-12 15:29:42 -04003172
Tejun Heo6aff8f12006-02-15 18:24:09 +09003173 DPRINTK("EXIT, err_mask=%x\n", err_mask);
3174 return err_mask;
Albert Lee8bf62ece2005-05-12 15:29:42 -04003175}
3176
3177/**
Jeff Garzik0cba6322005-05-30 19:49:12 -04003178 * ata_sg_clean - Unmap DMA memory associated with command
3179 * @qc: Command containing DMA memory to be released
3180 *
3181 * Unmap all mapped DMA memory associated with this command.
Linus Torvalds1da177e2005-04-16 15:20:36 -07003182 *
3183 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04003184 * spin_lock_irqsave(host_set lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003185 */
3186
3187static void ata_sg_clean(struct ata_queued_cmd *qc)
3188{
3189 struct ata_port *ap = qc->ap;
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003190 struct scatterlist *sg = qc->__sg;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003191 int dir = qc->dma_dir;
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003192 void *pad_buf = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003193
Tejun Heoa46314742006-02-11 19:11:13 +09003194 WARN_ON(!(qc->flags & ATA_QCFLAG_DMAMAP));
3195 WARN_ON(sg == NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003196
3197 if (qc->flags & ATA_QCFLAG_SINGLE)
Jeff Garzikf1318832006-02-20 16:55:56 -05003198 WARN_ON(qc->n_elem > 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003199
Jeff Garzik2c13b7c2005-11-14 14:14:16 -05003200 VPRINTK("unmapping %u sg elements\n", qc->n_elem);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003201
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003202 /* if we padded the buffer out to 32-bit bound, and data
3203 * xfer direction is from-device, we must copy from the
3204 * pad buffer back into the supplied buffer
3205 */
3206 if (qc->pad_len && !(qc->tf.flags & ATA_TFLAG_WRITE))
3207 pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ);
3208
3209 if (qc->flags & ATA_QCFLAG_SG) {
Jeff Garzike1410f22005-11-14 14:06:26 -05003210 if (qc->n_elem)
Brian King2f1f6102006-03-23 17:30:15 -06003211 dma_unmap_sg(ap->dev, sg, qc->n_elem, dir);
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003212 /* restore last sg */
3213 sg[qc->orig_n_elem - 1].length += qc->pad_len;
3214 if (pad_buf) {
3215 struct scatterlist *psg = &qc->pad_sgent;
3216 void *addr = kmap_atomic(psg->page, KM_IRQ0);
3217 memcpy(addr + psg->offset, pad_buf, qc->pad_len);
Mark Lorddfa15982005-12-12 23:19:28 -05003218 kunmap_atomic(addr, KM_IRQ0);
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003219 }
3220 } else {
Tejun Heo2e242fa2006-02-20 23:48:38 +09003221 if (qc->n_elem)
Brian King2f1f6102006-03-23 17:30:15 -06003222 dma_unmap_single(ap->dev,
Jeff Garzike1410f22005-11-14 14:06:26 -05003223 sg_dma_address(&sg[0]), sg_dma_len(&sg[0]),
3224 dir);
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003225 /* restore sg */
3226 sg->length += qc->pad_len;
3227 if (pad_buf)
3228 memcpy(qc->buf_virt + sg->length - qc->pad_len,
3229 pad_buf, qc->pad_len);
3230 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003231
3232 qc->flags &= ~ATA_QCFLAG_DMAMAP;
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003233 qc->__sg = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003234}
3235
3236/**
3237 * ata_fill_sg - Fill PCI IDE PRD table
3238 * @qc: Metadata associated with taskfile to be transferred
3239 *
Jeff Garzik780a87f2005-05-30 15:41:05 -04003240 * Fill PCI IDE PRD (scatter-gather) table with segments
3241 * associated with the current disk command.
3242 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07003243 * LOCKING:
Jeff Garzik780a87f2005-05-30 15:41:05 -04003244 * spin_lock_irqsave(host_set lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003245 *
3246 */
3247static void ata_fill_sg(struct ata_queued_cmd *qc)
3248{
Linus Torvalds1da177e2005-04-16 15:20:36 -07003249 struct ata_port *ap = qc->ap;
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003250 struct scatterlist *sg;
3251 unsigned int idx;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003252
Tejun Heoa46314742006-02-11 19:11:13 +09003253 WARN_ON(qc->__sg == NULL);
Jeff Garzikf1318832006-02-20 16:55:56 -05003254 WARN_ON(qc->n_elem == 0 && qc->pad_len == 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003255
3256 idx = 0;
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003257 ata_for_each_sg(sg, qc) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003258 u32 addr, offset;
3259 u32 sg_len, len;
3260
3261 /* determine if physical DMA addr spans 64K boundary.
3262 * Note h/w doesn't support 64-bit, so we unconditionally
3263 * truncate dma_addr_t to u32.
3264 */
3265 addr = (u32) sg_dma_address(sg);
3266 sg_len = sg_dma_len(sg);
3267
3268 while (sg_len) {
3269 offset = addr & 0xffff;
3270 len = sg_len;
3271 if ((offset + sg_len) > 0x10000)
3272 len = 0x10000 - offset;
3273
3274 ap->prd[idx].addr = cpu_to_le32(addr);
3275 ap->prd[idx].flags_len = cpu_to_le32(len & 0xffff);
3276 VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", idx, addr, len);
3277
3278 idx++;
3279 sg_len -= len;
3280 addr += len;
3281 }
3282 }
3283
3284 if (idx)
3285 ap->prd[idx - 1].flags_len |= cpu_to_le32(ATA_PRD_EOT);
3286}
3287/**
3288 * ata_check_atapi_dma - Check whether ATAPI DMA can be supported
3289 * @qc: Metadata associated with taskfile to check
3290 *
Jeff Garzik780a87f2005-05-30 15:41:05 -04003291 * Allow low-level driver to filter ATA PACKET commands, returning
3292 * a status indicating whether or not it is OK to use DMA for the
3293 * supplied PACKET command.
3294 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07003295 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04003296 * spin_lock_irqsave(host_set lock)
3297 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07003298 * RETURNS: 0 when ATAPI DMA can be used
3299 * nonzero otherwise
3300 */
3301int ata_check_atapi_dma(struct ata_queued_cmd *qc)
3302{
3303 struct ata_port *ap = qc->ap;
3304 int rc = 0; /* Assume ATAPI DMA is OK by default */
3305
3306 if (ap->ops->check_atapi_dma)
3307 rc = ap->ops->check_atapi_dma(qc);
3308
3309 return rc;
3310}
3311/**
3312 * ata_qc_prep - Prepare taskfile for submission
3313 * @qc: Metadata associated with taskfile to be prepared
3314 *
Jeff Garzik780a87f2005-05-30 15:41:05 -04003315 * Prepare ATA taskfile for submission.
3316 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07003317 * LOCKING:
3318 * spin_lock_irqsave(host_set lock)
3319 */
3320void ata_qc_prep(struct ata_queued_cmd *qc)
3321{
3322 if (!(qc->flags & ATA_QCFLAG_DMAMAP))
3323 return;
3324
3325 ata_fill_sg(qc);
3326}
3327
Brian Kinge46834c2006-03-17 17:04:03 -06003328void ata_noop_qc_prep(struct ata_queued_cmd *qc) { }
3329
Jeff Garzik0cba6322005-05-30 19:49:12 -04003330/**
3331 * ata_sg_init_one - Associate command with memory buffer
3332 * @qc: Command to be associated
3333 * @buf: Memory buffer
3334 * @buflen: Length of memory buffer, in bytes.
3335 *
3336 * Initialize the data-related elements of queued_cmd @qc
3337 * to point to a single memory buffer, @buf of byte length @buflen.
3338 *
3339 * LOCKING:
3340 * spin_lock_irqsave(host_set lock)
3341 */
3342
Linus Torvalds1da177e2005-04-16 15:20:36 -07003343void ata_sg_init_one(struct ata_queued_cmd *qc, void *buf, unsigned int buflen)
3344{
3345 struct scatterlist *sg;
3346
3347 qc->flags |= ATA_QCFLAG_SINGLE;
3348
3349 memset(&qc->sgent, 0, sizeof(qc->sgent));
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003350 qc->__sg = &qc->sgent;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003351 qc->n_elem = 1;
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003352 qc->orig_n_elem = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003353 qc->buf_virt = buf;
Brian King233277c2006-06-07 11:25:31 -05003354 qc->nbytes = buflen;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003355
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003356 sg = qc->__sg;
Jeff Garzikf0612bb2005-10-30 01:58:18 -05003357 sg_init_one(sg, buf, buflen);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003358}
3359
Jeff Garzik0cba6322005-05-30 19:49:12 -04003360/**
3361 * ata_sg_init - Associate command with scatter-gather table.
3362 * @qc: Command to be associated
3363 * @sg: Scatter-gather table.
3364 * @n_elem: Number of elements in s/g table.
3365 *
3366 * Initialize the data-related elements of queued_cmd @qc
3367 * to point to a scatter-gather table @sg, containing @n_elem
3368 * elements.
3369 *
3370 * LOCKING:
3371 * spin_lock_irqsave(host_set lock)
3372 */
3373
Linus Torvalds1da177e2005-04-16 15:20:36 -07003374void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
3375 unsigned int n_elem)
3376{
3377 qc->flags |= ATA_QCFLAG_SG;
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003378 qc->__sg = sg;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003379 qc->n_elem = n_elem;
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003380 qc->orig_n_elem = n_elem;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003381}
3382
3383/**
Jeff Garzik0cba6322005-05-30 19:49:12 -04003384 * ata_sg_setup_one - DMA-map the memory buffer associated with a command.
3385 * @qc: Command with memory buffer to be mapped.
3386 *
3387 * DMA-map the memory buffer associated with queued_cmd @qc.
Linus Torvalds1da177e2005-04-16 15:20:36 -07003388 *
3389 * LOCKING:
3390 * spin_lock_irqsave(host_set lock)
3391 *
3392 * RETURNS:
Jeff Garzik0cba6322005-05-30 19:49:12 -04003393 * Zero on success, negative on error.
Linus Torvalds1da177e2005-04-16 15:20:36 -07003394 */
3395
3396static int ata_sg_setup_one(struct ata_queued_cmd *qc)
3397{
3398 struct ata_port *ap = qc->ap;
3399 int dir = qc->dma_dir;
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003400 struct scatterlist *sg = qc->__sg;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003401 dma_addr_t dma_address;
Tejun Heo2e242fa2006-02-20 23:48:38 +09003402 int trim_sg = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003403
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003404 /* we must lengthen transfers to end on a 32-bit boundary */
3405 qc->pad_len = sg->length & 3;
3406 if (qc->pad_len) {
3407 void *pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ);
3408 struct scatterlist *psg = &qc->pad_sgent;
3409
Tejun Heoa46314742006-02-11 19:11:13 +09003410 WARN_ON(qc->dev->class != ATA_DEV_ATAPI);
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003411
3412 memset(pad_buf, 0, ATA_DMA_PAD_SZ);
3413
3414 if (qc->tf.flags & ATA_TFLAG_WRITE)
3415 memcpy(pad_buf, qc->buf_virt + sg->length - qc->pad_len,
3416 qc->pad_len);
3417
3418 sg_dma_address(psg) = ap->pad_dma + (qc->tag * ATA_DMA_PAD_SZ);
3419 sg_dma_len(psg) = ATA_DMA_PAD_SZ;
3420 /* trim sg */
3421 sg->length -= qc->pad_len;
Tejun Heo2e242fa2006-02-20 23:48:38 +09003422 if (sg->length == 0)
3423 trim_sg = 1;
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003424
3425 DPRINTK("padding done, sg->length=%u pad_len=%u\n",
3426 sg->length, qc->pad_len);
3427 }
3428
Tejun Heo2e242fa2006-02-20 23:48:38 +09003429 if (trim_sg) {
3430 qc->n_elem--;
Jeff Garzike1410f22005-11-14 14:06:26 -05003431 goto skip_map;
3432 }
3433
Brian King2f1f6102006-03-23 17:30:15 -06003434 dma_address = dma_map_single(ap->dev, qc->buf_virt,
Albert Lee32529e02005-05-26 03:49:42 -04003435 sg->length, dir);
Tejun Heo537a95d2005-11-05 14:29:01 -05003436 if (dma_mapping_error(dma_address)) {
3437 /* restore sg */
3438 sg->length += qc->pad_len;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003439 return -1;
Tejun Heo537a95d2005-11-05 14:29:01 -05003440 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003441
3442 sg_dma_address(sg) = dma_address;
Albert Lee32529e02005-05-26 03:49:42 -04003443 sg_dma_len(sg) = sg->length;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003444
Tejun Heo2e242fa2006-02-20 23:48:38 +09003445skip_map:
Linus Torvalds1da177e2005-04-16 15:20:36 -07003446 DPRINTK("mapped buffer of %d bytes for %s\n", sg_dma_len(sg),
3447 qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read");
3448
3449 return 0;
3450}
3451
3452/**
Jeff Garzik0cba6322005-05-30 19:49:12 -04003453 * ata_sg_setup - DMA-map the scatter-gather table associated with a command.
3454 * @qc: Command with scatter-gather table to be mapped.
3455 *
3456 * DMA-map the scatter-gather table associated with queued_cmd @qc.
Linus Torvalds1da177e2005-04-16 15:20:36 -07003457 *
3458 * LOCKING:
3459 * spin_lock_irqsave(host_set lock)
3460 *
3461 * RETURNS:
Jeff Garzik0cba6322005-05-30 19:49:12 -04003462 * Zero on success, negative on error.
Linus Torvalds1da177e2005-04-16 15:20:36 -07003463 *
3464 */
3465
3466static int ata_sg_setup(struct ata_queued_cmd *qc)
3467{
3468 struct ata_port *ap = qc->ap;
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003469 struct scatterlist *sg = qc->__sg;
3470 struct scatterlist *lsg = &sg[qc->n_elem - 1];
Jeff Garzike1410f22005-11-14 14:06:26 -05003471 int n_elem, pre_n_elem, dir, trim_sg = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003472
3473 VPRINTK("ENTER, ata%u\n", ap->id);
Tejun Heoa46314742006-02-11 19:11:13 +09003474 WARN_ON(!(qc->flags & ATA_QCFLAG_SG));
Linus Torvalds1da177e2005-04-16 15:20:36 -07003475
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003476 /* we must lengthen transfers to end on a 32-bit boundary */
3477 qc->pad_len = lsg->length & 3;
3478 if (qc->pad_len) {
3479 void *pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ);
3480 struct scatterlist *psg = &qc->pad_sgent;
3481 unsigned int offset;
3482
Tejun Heoa46314742006-02-11 19:11:13 +09003483 WARN_ON(qc->dev->class != ATA_DEV_ATAPI);
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003484
3485 memset(pad_buf, 0, ATA_DMA_PAD_SZ);
3486
3487 /*
3488 * psg->page/offset are used to copy to-be-written
3489 * data in this function or read data in ata_sg_clean.
3490 */
3491 offset = lsg->offset + lsg->length - qc->pad_len;
3492 psg->page = nth_page(lsg->page, offset >> PAGE_SHIFT);
3493 psg->offset = offset_in_page(offset);
3494
3495 if (qc->tf.flags & ATA_TFLAG_WRITE) {
3496 void *addr = kmap_atomic(psg->page, KM_IRQ0);
3497 memcpy(pad_buf, addr + psg->offset, qc->pad_len);
Mark Lorddfa15982005-12-12 23:19:28 -05003498 kunmap_atomic(addr, KM_IRQ0);
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003499 }
3500
3501 sg_dma_address(psg) = ap->pad_dma + (qc->tag * ATA_DMA_PAD_SZ);
3502 sg_dma_len(psg) = ATA_DMA_PAD_SZ;
3503 /* trim last sg */
3504 lsg->length -= qc->pad_len;
Jeff Garzike1410f22005-11-14 14:06:26 -05003505 if (lsg->length == 0)
3506 trim_sg = 1;
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003507
3508 DPRINTK("padding done, sg[%d].length=%u pad_len=%u\n",
3509 qc->n_elem - 1, lsg->length, qc->pad_len);
3510 }
3511
Jeff Garzike1410f22005-11-14 14:06:26 -05003512 pre_n_elem = qc->n_elem;
3513 if (trim_sg && pre_n_elem)
3514 pre_n_elem--;
3515
3516 if (!pre_n_elem) {
3517 n_elem = 0;
3518 goto skip_map;
3519 }
3520
Linus Torvalds1da177e2005-04-16 15:20:36 -07003521 dir = qc->dma_dir;
Brian King2f1f6102006-03-23 17:30:15 -06003522 n_elem = dma_map_sg(ap->dev, sg, pre_n_elem, dir);
Tejun Heo537a95d2005-11-05 14:29:01 -05003523 if (n_elem < 1) {
3524 /* restore last sg */
3525 lsg->length += qc->pad_len;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003526 return -1;
Tejun Heo537a95d2005-11-05 14:29:01 -05003527 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003528
3529 DPRINTK("%d sg elements mapped\n", n_elem);
3530
Jeff Garzike1410f22005-11-14 14:06:26 -05003531skip_map:
Linus Torvalds1da177e2005-04-16 15:20:36 -07003532 qc->n_elem = n_elem;
3533
3534 return 0;
3535}
3536
3537/**
Randy Dunlapc893a3a2006-01-28 13:15:32 -05003538 * swap_buf_le16 - swap halves of 16-bit words in place
Edward Falk0baab862005-06-02 18:17:13 -04003539 * @buf: Buffer to swap
3540 * @buf_words: Number of 16-bit words in buffer.
3541 *
3542 * Swap halves of 16-bit words if needed to convert from
3543 * little-endian byte order to native cpu byte order, or
3544 * vice-versa.
3545 *
3546 * LOCKING:
Randy Dunlap6f0ef4f2005-10-25 01:44:30 -04003547 * Inherited from caller.
Edward Falk0baab862005-06-02 18:17:13 -04003548 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003549void swap_buf_le16(u16 *buf, unsigned int buf_words)
3550{
3551#ifdef __BIG_ENDIAN
3552 unsigned int i;
3553
3554 for (i = 0; i < buf_words; i++)
3555 buf[i] = le16_to_cpu(buf[i]);
3556#endif /* __BIG_ENDIAN */
3557}
3558
Albert Lee6ae4cfb2005-08-12 14:15:34 +08003559/**
3560 * ata_mmio_data_xfer - Transfer data by MMIO
Jeff Garzikbf717b112006-06-13 20:27:03 -04003561 * @adev: device for this I/O
Albert Lee6ae4cfb2005-08-12 14:15:34 +08003562 * @buf: data buffer
3563 * @buflen: buffer length
Jeff Garzik344baba2005-09-07 01:15:17 -04003564 * @write_data: read/write
Albert Lee6ae4cfb2005-08-12 14:15:34 +08003565 *
3566 * Transfer data from/to the device data register by MMIO.
3567 *
3568 * LOCKING:
3569 * Inherited from caller.
Albert Lee6ae4cfb2005-08-12 14:15:34 +08003570 */
3571
Tejun Heo88574552006-06-25 20:00:35 +09003572void ata_mmio_data_xfer(struct ata_device *adev, unsigned char *buf,
Alan Coxa6b2c5d2006-05-22 16:59:59 +01003573 unsigned int buflen, int write_data)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003574{
Alan Coxa6b2c5d2006-05-22 16:59:59 +01003575 struct ata_port *ap = adev->ap;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003576 unsigned int i;
3577 unsigned int words = buflen >> 1;
3578 u16 *buf16 = (u16 *) buf;
3579 void __iomem *mmio = (void __iomem *)ap->ioaddr.data_addr;
3580
Albert Lee6ae4cfb2005-08-12 14:15:34 +08003581 /* Transfer multiple of 2 bytes */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003582 if (write_data) {
3583 for (i = 0; i < words; i++)
3584 writew(le16_to_cpu(buf16[i]), mmio);
3585 } else {
3586 for (i = 0; i < words; i++)
3587 buf16[i] = cpu_to_le16(readw(mmio));
3588 }
Albert Lee6ae4cfb2005-08-12 14:15:34 +08003589
3590 /* Transfer trailing 1 byte, if any. */
3591 if (unlikely(buflen & 0x01)) {
3592 u16 align_buf[1] = { 0 };
3593 unsigned char *trailing_buf = buf + buflen - 1;
3594
3595 if (write_data) {
3596 memcpy(align_buf, trailing_buf, 1);
3597 writew(le16_to_cpu(align_buf[0]), mmio);
3598 } else {
3599 align_buf[0] = cpu_to_le16(readw(mmio));
3600 memcpy(trailing_buf, align_buf, 1);
3601 }
3602 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003603}
3604
Albert Lee6ae4cfb2005-08-12 14:15:34 +08003605/**
3606 * ata_pio_data_xfer - Transfer data by PIO
Alan Coxa6b2c5d2006-05-22 16:59:59 +01003607 * @adev: device to target
Albert Lee6ae4cfb2005-08-12 14:15:34 +08003608 * @buf: data buffer
3609 * @buflen: buffer length
Jeff Garzik344baba2005-09-07 01:15:17 -04003610 * @write_data: read/write
Albert Lee6ae4cfb2005-08-12 14:15:34 +08003611 *
3612 * Transfer data from/to the device data register by PIO.
3613 *
3614 * LOCKING:
3615 * Inherited from caller.
Albert Lee6ae4cfb2005-08-12 14:15:34 +08003616 */
3617
Tejun Heo88574552006-06-25 20:00:35 +09003618void ata_pio_data_xfer(struct ata_device *adev, unsigned char *buf,
Alan Coxa6b2c5d2006-05-22 16:59:59 +01003619 unsigned int buflen, int write_data)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003620{
Alan Coxa6b2c5d2006-05-22 16:59:59 +01003621 struct ata_port *ap = adev->ap;
Albert Lee6ae4cfb2005-08-12 14:15:34 +08003622 unsigned int words = buflen >> 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003623
Albert Lee6ae4cfb2005-08-12 14:15:34 +08003624 /* Transfer multiple of 2 bytes */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003625 if (write_data)
Albert Lee6ae4cfb2005-08-12 14:15:34 +08003626 outsw(ap->ioaddr.data_addr, buf, words);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003627 else
Albert Lee6ae4cfb2005-08-12 14:15:34 +08003628 insw(ap->ioaddr.data_addr, buf, words);
3629
3630 /* Transfer trailing 1 byte, if any. */
3631 if (unlikely(buflen & 0x01)) {
3632 u16 align_buf[1] = { 0 };
3633 unsigned char *trailing_buf = buf + buflen - 1;
3634
3635 if (write_data) {
3636 memcpy(align_buf, trailing_buf, 1);
3637 outw(le16_to_cpu(align_buf[0]), ap->ioaddr.data_addr);
3638 } else {
3639 align_buf[0] = cpu_to_le16(inw(ap->ioaddr.data_addr));
3640 memcpy(trailing_buf, align_buf, 1);
3641 }
3642 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003643}
3644
Albert Lee6ae4cfb2005-08-12 14:15:34 +08003645/**
Alan Cox75e99582006-05-24 14:14:41 +01003646 * ata_pio_data_xfer_noirq - Transfer data by PIO
3647 * @adev: device to target
3648 * @buf: data buffer
3649 * @buflen: buffer length
3650 * @write_data: read/write
3651 *
Tejun Heo88574552006-06-25 20:00:35 +09003652 * Transfer data from/to the device data register by PIO. Do the
Alan Cox75e99582006-05-24 14:14:41 +01003653 * transfer with interrupts disabled.
3654 *
3655 * LOCKING:
3656 * Inherited from caller.
3657 */
3658
3659void ata_pio_data_xfer_noirq(struct ata_device *adev, unsigned char *buf,
3660 unsigned int buflen, int write_data)
3661{
3662 unsigned long flags;
3663 local_irq_save(flags);
3664 ata_pio_data_xfer(adev, buf, buflen, write_data);
3665 local_irq_restore(flags);
3666}
3667
3668
3669/**
Albert Lee6ae4cfb2005-08-12 14:15:34 +08003670 * ata_pio_sector - Transfer ATA_SECT_SIZE (512 bytes) of data.
3671 * @qc: Command on going
3672 *
3673 * Transfer ATA_SECT_SIZE of data from/to the ATA device.
3674 *
3675 * LOCKING:
3676 * Inherited from caller.
3677 */
3678
Linus Torvalds1da177e2005-04-16 15:20:36 -07003679static void ata_pio_sector(struct ata_queued_cmd *qc)
3680{
3681 int do_write = (qc->tf.flags & ATA_TFLAG_WRITE);
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003682 struct scatterlist *sg = qc->__sg;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003683 struct ata_port *ap = qc->ap;
3684 struct page *page;
3685 unsigned int offset;
3686 unsigned char *buf;
3687
3688 if (qc->cursect == (qc->nsect - 1))
Albert Lee14be71f2005-09-27 17:36:35 +08003689 ap->hsm_task_state = HSM_ST_LAST;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003690
3691 page = sg[qc->cursg].page;
3692 offset = sg[qc->cursg].offset + qc->cursg_ofs * ATA_SECT_SIZE;
3693
3694 /* get the current page and offset */
3695 page = nth_page(page, (offset >> PAGE_SHIFT));
3696 offset %= PAGE_SIZE;
3697
Albert Lee7282aa42005-10-09 09:46:07 -04003698 DPRINTK("data %s\n", qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read");
3699
Albert Lee91b8b312005-10-09 09:48:44 -04003700 if (PageHighMem(page)) {
3701 unsigned long flags;
Albert Lee7282aa42005-10-09 09:46:07 -04003702
Alan Coxa6b2c5d2006-05-22 16:59:59 +01003703 /* FIXME: use a bounce buffer */
Albert Lee91b8b312005-10-09 09:48:44 -04003704 local_irq_save(flags);
3705 buf = kmap_atomic(page, KM_IRQ0);
Albert Lee083958d2005-10-09 09:47:31 -04003706
Albert Lee91b8b312005-10-09 09:48:44 -04003707 /* do the actual data transfer */
Alan Coxa6b2c5d2006-05-22 16:59:59 +01003708 ap->ops->data_xfer(qc->dev, buf + offset, ATA_SECT_SIZE, do_write);
Albert Lee91b8b312005-10-09 09:48:44 -04003709
3710 kunmap_atomic(buf, KM_IRQ0);
3711 local_irq_restore(flags);
3712 } else {
3713 buf = page_address(page);
Alan Coxa6b2c5d2006-05-22 16:59:59 +01003714 ap->ops->data_xfer(qc->dev, buf + offset, ATA_SECT_SIZE, do_write);
Albert Lee91b8b312005-10-09 09:48:44 -04003715 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003716
3717 qc->cursect++;
3718 qc->cursg_ofs++;
3719
Albert Lee32529e02005-05-26 03:49:42 -04003720 if ((qc->cursg_ofs * ATA_SECT_SIZE) == (&sg[qc->cursg])->length) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003721 qc->cursg++;
3722 qc->cursg_ofs = 0;
3723 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003724}
Linus Torvalds1da177e2005-04-16 15:20:36 -07003725
Albert Lee6ae4cfb2005-08-12 14:15:34 +08003726/**
Albert Lee07f6f7d2005-11-01 19:33:20 +08003727 * ata_pio_sectors - Transfer one or many 512-byte sectors.
3728 * @qc: Command on going
3729 *
Jeff Garzikc81e29b2006-05-24 01:49:12 -04003730 * Transfer one or many ATA_SECT_SIZE of data from/to the
Albert Lee07f6f7d2005-11-01 19:33:20 +08003731 * ATA device for the DRQ request.
3732 *
3733 * LOCKING:
3734 * Inherited from caller.
3735 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003736
Albert Lee07f6f7d2005-11-01 19:33:20 +08003737static void ata_pio_sectors(struct ata_queued_cmd *qc)
3738{
3739 if (is_multi_taskfile(&qc->tf)) {
3740 /* READ/WRITE MULTIPLE */
3741 unsigned int nsect;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003742
Jeff Garzik587005d2006-02-11 18:17:32 -05003743 WARN_ON(qc->dev->multi_count == 0);
Albert Lee07f6f7d2005-11-01 19:33:20 +08003744
3745 nsect = min(qc->nsect - qc->cursect, qc->dev->multi_count);
3746 while (nsect--)
3747 ata_pio_sector(qc);
3748 } else
3749 ata_pio_sector(qc);
3750}
3751
3752/**
Albert Leec71c1852005-10-04 06:03:45 -04003753 * atapi_send_cdb - Write CDB bytes to hardware
3754 * @ap: Port to which ATAPI device is attached.
3755 * @qc: Taskfile currently active
3756 *
3757 * When device has indicated its readiness to accept
3758 * a CDB, this function is called. Send the CDB.
3759 *
3760 * LOCKING:
3761 * caller.
3762 */
3763
3764static void atapi_send_cdb(struct ata_port *ap, struct ata_queued_cmd *qc)
3765{
3766 /* send SCSI cdb */
3767 DPRINTK("send cdb\n");
Jeff Garzikdb024d52006-02-13 00:23:57 -05003768 WARN_ON(qc->dev->cdb_len < 12);
Albert Leec71c1852005-10-04 06:03:45 -04003769
Alan Coxa6b2c5d2006-05-22 16:59:59 +01003770 ap->ops->data_xfer(qc->dev, qc->cdb, qc->dev->cdb_len, 1);
Albert Leec71c1852005-10-04 06:03:45 -04003771 ata_altstatus(ap); /* flush */
3772
3773 switch (qc->tf.protocol) {
3774 case ATA_PROT_ATAPI:
3775 ap->hsm_task_state = HSM_ST;
3776 break;
3777 case ATA_PROT_ATAPI_NODATA:
3778 ap->hsm_task_state = HSM_ST_LAST;
3779 break;
3780 case ATA_PROT_ATAPI_DMA:
3781 ap->hsm_task_state = HSM_ST_LAST;
3782 /* initiate bmdma */
3783 ap->ops->bmdma_start(qc);
3784 break;
3785 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003786}
3787
Albert Lee6ae4cfb2005-08-12 14:15:34 +08003788/**
3789 * __atapi_pio_bytes - Transfer data from/to the ATAPI device.
3790 * @qc: Command on going
3791 * @bytes: number of bytes
3792 *
3793 * Transfer Transfer data from/to the ATAPI device.
3794 *
3795 * LOCKING:
3796 * Inherited from caller.
3797 *
3798 */
3799
Linus Torvalds1da177e2005-04-16 15:20:36 -07003800static void __atapi_pio_bytes(struct ata_queued_cmd *qc, unsigned int bytes)
3801{
3802 int do_write = (qc->tf.flags & ATA_TFLAG_WRITE);
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003803 struct scatterlist *sg = qc->__sg;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003804 struct ata_port *ap = qc->ap;
3805 struct page *page;
3806 unsigned char *buf;
3807 unsigned int offset, count;
3808
Albert Lee563a6e12005-08-12 14:17:50 +08003809 if (qc->curbytes + bytes >= qc->nbytes)
Albert Lee14be71f2005-09-27 17:36:35 +08003810 ap->hsm_task_state = HSM_ST_LAST;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003811
3812next_sg:
Albert Lee563a6e12005-08-12 14:17:50 +08003813 if (unlikely(qc->cursg >= qc->n_elem)) {
Jeff Garzik7fb6ec22005-09-16 06:01:48 -04003814 /*
Albert Lee563a6e12005-08-12 14:17:50 +08003815 * The end of qc->sg is reached and the device expects
3816 * more data to transfer. In order not to overrun qc->sg
3817 * and fulfill length specified in the byte count register,
3818 * - for read case, discard trailing data from the device
3819 * - for write case, padding zero data to the device
3820 */
3821 u16 pad_buf[1] = { 0 };
3822 unsigned int words = bytes >> 1;
3823 unsigned int i;
3824
3825 if (words) /* warning if bytes > 1 */
Tejun Heof15a1da2006-05-15 20:57:56 +09003826 ata_dev_printk(qc->dev, KERN_WARNING,
3827 "%u bytes trailing data\n", bytes);
Albert Lee563a6e12005-08-12 14:17:50 +08003828
3829 for (i = 0; i < words; i++)
Alan Coxa6b2c5d2006-05-22 16:59:59 +01003830 ap->ops->data_xfer(qc->dev, (unsigned char*)pad_buf, 2, do_write);
Albert Lee563a6e12005-08-12 14:17:50 +08003831
Albert Lee14be71f2005-09-27 17:36:35 +08003832 ap->hsm_task_state = HSM_ST_LAST;
Albert Lee563a6e12005-08-12 14:17:50 +08003833 return;
3834 }
3835
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003836 sg = &qc->__sg[qc->cursg];
Linus Torvalds1da177e2005-04-16 15:20:36 -07003837
Linus Torvalds1da177e2005-04-16 15:20:36 -07003838 page = sg->page;
3839 offset = sg->offset + qc->cursg_ofs;
3840
3841 /* get the current page and offset */
3842 page = nth_page(page, (offset >> PAGE_SHIFT));
3843 offset %= PAGE_SIZE;
3844
Albert Lee6952df02005-06-06 15:56:03 +08003845 /* don't overrun current sg */
Albert Lee32529e02005-05-26 03:49:42 -04003846 count = min(sg->length - qc->cursg_ofs, bytes);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003847
3848 /* don't cross page boundaries */
3849 count = min(count, (unsigned int)PAGE_SIZE - offset);
3850
Albert Lee7282aa42005-10-09 09:46:07 -04003851 DPRINTK("data %s\n", qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read");
3852
Albert Lee91b8b312005-10-09 09:48:44 -04003853 if (PageHighMem(page)) {
3854 unsigned long flags;
Albert Lee7282aa42005-10-09 09:46:07 -04003855
Alan Coxa6b2c5d2006-05-22 16:59:59 +01003856 /* FIXME: use bounce buffer */
Albert Lee91b8b312005-10-09 09:48:44 -04003857 local_irq_save(flags);
3858 buf = kmap_atomic(page, KM_IRQ0);
Albert Lee083958d2005-10-09 09:47:31 -04003859
Albert Lee91b8b312005-10-09 09:48:44 -04003860 /* do the actual data transfer */
Alan Coxa6b2c5d2006-05-22 16:59:59 +01003861 ap->ops->data_xfer(qc->dev, buf + offset, count, do_write);
Albert Lee91b8b312005-10-09 09:48:44 -04003862
3863 kunmap_atomic(buf, KM_IRQ0);
3864 local_irq_restore(flags);
3865 } else {
3866 buf = page_address(page);
Alan Coxa6b2c5d2006-05-22 16:59:59 +01003867 ap->ops->data_xfer(qc->dev, buf + offset, count, do_write);
Albert Lee91b8b312005-10-09 09:48:44 -04003868 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003869
3870 bytes -= count;
3871 qc->curbytes += count;
3872 qc->cursg_ofs += count;
3873
Albert Lee32529e02005-05-26 03:49:42 -04003874 if (qc->cursg_ofs == sg->length) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003875 qc->cursg++;
3876 qc->cursg_ofs = 0;
3877 }
3878
Albert Lee563a6e12005-08-12 14:17:50 +08003879 if (bytes)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003880 goto next_sg;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003881}
3882
Albert Lee6ae4cfb2005-08-12 14:15:34 +08003883/**
3884 * atapi_pio_bytes - Transfer data from/to the ATAPI device.
3885 * @qc: Command on going
3886 *
3887 * Transfer Transfer data from/to the ATAPI device.
3888 *
3889 * LOCKING:
3890 * Inherited from caller.
Albert Lee6ae4cfb2005-08-12 14:15:34 +08003891 */
3892
Linus Torvalds1da177e2005-04-16 15:20:36 -07003893static void atapi_pio_bytes(struct ata_queued_cmd *qc)
3894{
3895 struct ata_port *ap = qc->ap;
3896 struct ata_device *dev = qc->dev;
3897 unsigned int ireason, bc_lo, bc_hi, bytes;
3898 int i_write, do_write = (qc->tf.flags & ATA_TFLAG_WRITE) ? 1 : 0;
3899
Albert Leeeec4c3f2006-05-18 17:51:10 +08003900 /* Abuse qc->result_tf for temp storage of intermediate TF
3901 * here to save some kernel stack usage.
3902 * For normal completion, qc->result_tf is not relevant. For
3903 * error, qc->result_tf is later overwritten by ata_qc_complete().
3904 * So, the correctness of qc->result_tf is not affected.
3905 */
3906 ap->ops->tf_read(ap, &qc->result_tf);
3907 ireason = qc->result_tf.nsect;
3908 bc_lo = qc->result_tf.lbam;
3909 bc_hi = qc->result_tf.lbah;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003910 bytes = (bc_hi << 8) | bc_lo;
3911
3912 /* shall be cleared to zero, indicating xfer of data */
3913 if (ireason & (1 << 0))
3914 goto err_out;
3915
3916 /* make sure transfer direction matches expected */
3917 i_write = ((ireason & (1 << 1)) == 0) ? 1 : 0;
3918 if (do_write != i_write)
3919 goto err_out;
3920
Albert Lee312f7da2005-09-27 17:38:03 +08003921 VPRINTK("ata%u: xfering %d bytes\n", ap->id, bytes);
3922
Linus Torvalds1da177e2005-04-16 15:20:36 -07003923 __atapi_pio_bytes(qc, bytes);
3924
3925 return;
3926
3927err_out:
Tejun Heof15a1da2006-05-15 20:57:56 +09003928 ata_dev_printk(dev, KERN_INFO, "ATAPI check failed\n");
Tejun Heo11a56d22006-01-23 13:09:36 +09003929 qc->err_mask |= AC_ERR_HSM;
Albert Lee14be71f2005-09-27 17:36:35 +08003930 ap->hsm_task_state = HSM_ST_ERR;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003931}
3932
3933/**
Albert Leec234fb02006-03-25 17:58:38 +08003934 * ata_hsm_ok_in_wq - Check if the qc can be handled in the workqueue.
3935 * @ap: the target ata_port
3936 * @qc: qc on going
Linus Torvalds1da177e2005-04-16 15:20:36 -07003937 *
Albert Leec234fb02006-03-25 17:58:38 +08003938 * RETURNS:
3939 * 1 if ok in workqueue, 0 otherwise.
Linus Torvalds1da177e2005-04-16 15:20:36 -07003940 */
Albert Leec234fb02006-03-25 17:58:38 +08003941
3942static inline int ata_hsm_ok_in_wq(struct ata_port *ap, struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003943{
Albert Leec234fb02006-03-25 17:58:38 +08003944 if (qc->tf.flags & ATA_TFLAG_POLLING)
3945 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003946
Albert Leec234fb02006-03-25 17:58:38 +08003947 if (ap->hsm_task_state == HSM_ST_FIRST) {
3948 if (qc->tf.protocol == ATA_PROT_PIO &&
3949 (qc->tf.flags & ATA_TFLAG_WRITE))
3950 return 1;
3951
3952 if (is_atapi_taskfile(&qc->tf) &&
3953 !(qc->dev->flags & ATA_DFLAG_CDB_INTR))
3954 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003955 }
3956
Albert Leec234fb02006-03-25 17:58:38 +08003957 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003958}
3959
Albert Leec234fb02006-03-25 17:58:38 +08003960/**
Tejun Heoc17ea202006-05-15 20:59:29 +09003961 * ata_hsm_qc_complete - finish a qc running on standard HSM
3962 * @qc: Command to complete
3963 * @in_wq: 1 if called from workqueue, 0 otherwise
3964 *
3965 * Finish @qc which is running on standard HSM.
3966 *
3967 * LOCKING:
3968 * If @in_wq is zero, spin_lock_irqsave(host_set lock).
3969 * Otherwise, none on entry and grabs host lock.
3970 */
3971static void ata_hsm_qc_complete(struct ata_queued_cmd *qc, int in_wq)
3972{
3973 struct ata_port *ap = qc->ap;
3974 unsigned long flags;
3975
3976 if (ap->ops->error_handler) {
3977 if (in_wq) {
Jeff Garzikba6a1302006-06-22 23:46:10 -04003978 spin_lock_irqsave(ap->lock, flags);
Tejun Heoc17ea202006-05-15 20:59:29 +09003979
3980 /* EH might have kicked in while host_set lock
3981 * is released.
3982 */
3983 qc = ata_qc_from_tag(ap, qc->tag);
3984 if (qc) {
3985 if (likely(!(qc->err_mask & AC_ERR_HSM))) {
3986 ata_irq_on(ap);
3987 ata_qc_complete(qc);
3988 } else
3989 ata_port_freeze(ap);
3990 }
3991
Jeff Garzikba6a1302006-06-22 23:46:10 -04003992 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heoc17ea202006-05-15 20:59:29 +09003993 } else {
3994 if (likely(!(qc->err_mask & AC_ERR_HSM)))
3995 ata_qc_complete(qc);
3996 else
3997 ata_port_freeze(ap);
3998 }
3999 } else {
4000 if (in_wq) {
Jeff Garzikba6a1302006-06-22 23:46:10 -04004001 spin_lock_irqsave(ap->lock, flags);
Tejun Heoc17ea202006-05-15 20:59:29 +09004002 ata_irq_on(ap);
4003 ata_qc_complete(qc);
Jeff Garzikba6a1302006-06-22 23:46:10 -04004004 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heoc17ea202006-05-15 20:59:29 +09004005 } else
4006 ata_qc_complete(qc);
4007 }
Jeff Garzikc81e29b2006-05-24 01:49:12 -04004008
4009 ata_altstatus(ap); /* flush */
Tejun Heoc17ea202006-05-15 20:59:29 +09004010}
4011
4012/**
Albert Leebb5cb292006-03-25 17:48:02 +08004013 * ata_hsm_move - move the HSM to the next state.
4014 * @ap: the target ata_port
4015 * @qc: qc on going
4016 * @status: current device status
4017 * @in_wq: 1 if called from workqueue, 0 otherwise
4018 *
4019 * RETURNS:
4020 * 1 when poll next status needed, 0 otherwise.
4021 */
Tejun Heo9a1004d2006-05-31 18:27:52 +09004022int ata_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc,
4023 u8 status, int in_wq)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004024{
Albert Leebb5cb292006-03-25 17:48:02 +08004025 unsigned long flags = 0;
4026 int poll_next;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004027
Albert Lee6912ccd2006-03-25 17:45:49 +08004028 WARN_ON((qc->flags & ATA_QCFLAG_ACTIVE) == 0);
Albert Lee0565c262006-02-13 18:55:25 +08004029
Albert Leebb5cb292006-03-25 17:48:02 +08004030 /* Make sure ata_qc_issue_prot() does not throw things
4031 * like DMA polling into the workqueue. Notice that
4032 * in_wq is not equivalent to (qc->tf.flags & ATA_TFLAG_POLLING).
Albert Lee1c848982005-12-05 15:40:15 +08004033 */
Albert Leec234fb02006-03-25 17:58:38 +08004034 WARN_ON(in_wq != ata_hsm_ok_in_wq(ap, qc));
Albert Lee1c848982005-12-05 15:40:15 +08004035
Albert Leee2cec772006-03-25 17:43:49 +08004036fsm_start:
Albert Lee999bb6f2006-03-25 18:07:48 +08004037 DPRINTK("ata%u: protocol %d task_state %d (dev_stat 0x%X)\n",
4038 ap->id, qc->tf.protocol, ap->hsm_task_state, status);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004039
Albert Leee2cec772006-03-25 17:43:49 +08004040 switch (ap->hsm_task_state) {
4041 case HSM_ST_FIRST:
Albert Leebb5cb292006-03-25 17:48:02 +08004042 /* Send first data block or PACKET CDB */
4043
4044 /* If polling, we will stay in the work queue after
4045 * sending the data. Otherwise, interrupt handler
4046 * takes over after sending the data.
4047 */
4048 poll_next = (qc->tf.flags & ATA_TFLAG_POLLING);
4049
Albert Leee2cec772006-03-25 17:43:49 +08004050 /* check device status */
Albert Lee3655d1d2006-05-19 11:43:04 +08004051 if (unlikely((status & ATA_DRQ) == 0)) {
4052 /* handle BSY=0, DRQ=0 as error */
4053 if (likely(status & (ATA_ERR | ATA_DF)))
4054 /* device stops HSM for abort/error */
4055 qc->err_mask |= AC_ERR_DEV;
4056 else
4057 /* HSM violation. Let EH handle this */
4058 qc->err_mask |= AC_ERR_HSM;
4059
Albert Leee2cec772006-03-25 17:43:49 +08004060 ap->hsm_task_state = HSM_ST_ERR;
4061 goto fsm_start;
4062 }
4063
Albert Lee71601952006-03-25 18:11:12 +08004064 /* Device should not ask for data transfer (DRQ=1)
4065 * when it finds something wrong.
Albert Leeeee6c322006-04-01 17:38:43 +08004066 * We ignore DRQ here and stop the HSM by
4067 * changing hsm_task_state to HSM_ST_ERR and
4068 * let the EH abort the command or reset the device.
Albert Lee71601952006-03-25 18:11:12 +08004069 */
4070 if (unlikely(status & (ATA_ERR | ATA_DF))) {
4071 printk(KERN_WARNING "ata%d: DRQ=1 with device error, dev_stat 0x%X\n",
4072 ap->id, status);
Albert Lee3655d1d2006-05-19 11:43:04 +08004073 qc->err_mask |= AC_ERR_HSM;
Albert Leeeee6c322006-04-01 17:38:43 +08004074 ap->hsm_task_state = HSM_ST_ERR;
4075 goto fsm_start;
Albert Lee71601952006-03-25 18:11:12 +08004076 }
4077
Albert Leebb5cb292006-03-25 17:48:02 +08004078 /* Send the CDB (atapi) or the first data block (ata pio out).
4079 * During the state transition, interrupt handler shouldn't
4080 * be invoked before the data transfer is complete and
4081 * hsm_task_state is changed. Hence, the following locking.
4082 */
4083 if (in_wq)
Jeff Garzikba6a1302006-06-22 23:46:10 -04004084 spin_lock_irqsave(ap->lock, flags);
Albert Leee2cec772006-03-25 17:43:49 +08004085
Albert Leebb5cb292006-03-25 17:48:02 +08004086 if (qc->tf.protocol == ATA_PROT_PIO) {
4087 /* PIO data out protocol.
4088 * send first data block.
4089 */
4090
4091 /* ata_pio_sectors() might change the state
4092 * to HSM_ST_LAST. so, the state is changed here
4093 * before ata_pio_sectors().
4094 */
4095 ap->hsm_task_state = HSM_ST;
4096 ata_pio_sectors(qc);
4097 ata_altstatus(ap); /* flush */
4098 } else
4099 /* send CDB */
4100 atapi_send_cdb(ap, qc);
4101
4102 if (in_wq)
Jeff Garzikba6a1302006-06-22 23:46:10 -04004103 spin_unlock_irqrestore(ap->lock, flags);
Albert Leebb5cb292006-03-25 17:48:02 +08004104
4105 /* if polling, ata_pio_task() handles the rest.
4106 * otherwise, interrupt handler takes over from here.
4107 */
Albert Leee2cec772006-03-25 17:43:49 +08004108 break;
4109
4110 case HSM_ST:
4111 /* complete command or read/write the data register */
4112 if (qc->tf.protocol == ATA_PROT_ATAPI) {
4113 /* ATAPI PIO protocol */
4114 if ((status & ATA_DRQ) == 0) {
Albert Lee3655d1d2006-05-19 11:43:04 +08004115 /* No more data to transfer or device error.
4116 * Device error will be tagged in HSM_ST_LAST.
4117 */
Albert Leee2cec772006-03-25 17:43:49 +08004118 ap->hsm_task_state = HSM_ST_LAST;
4119 goto fsm_start;
4120 }
4121
Albert Lee71601952006-03-25 18:11:12 +08004122 /* Device should not ask for data transfer (DRQ=1)
4123 * when it finds something wrong.
Albert Leeeee6c322006-04-01 17:38:43 +08004124 * We ignore DRQ here and stop the HSM by
4125 * changing hsm_task_state to HSM_ST_ERR and
4126 * let the EH abort the command or reset the device.
Albert Lee71601952006-03-25 18:11:12 +08004127 */
4128 if (unlikely(status & (ATA_ERR | ATA_DF))) {
4129 printk(KERN_WARNING "ata%d: DRQ=1 with device error, dev_stat 0x%X\n",
4130 ap->id, status);
Albert Lee3655d1d2006-05-19 11:43:04 +08004131 qc->err_mask |= AC_ERR_HSM;
Albert Leeeee6c322006-04-01 17:38:43 +08004132 ap->hsm_task_state = HSM_ST_ERR;
4133 goto fsm_start;
Albert Lee71601952006-03-25 18:11:12 +08004134 }
4135
Albert Leee2cec772006-03-25 17:43:49 +08004136 atapi_pio_bytes(qc);
4137
4138 if (unlikely(ap->hsm_task_state == HSM_ST_ERR))
4139 /* bad ireason reported by device */
4140 goto fsm_start;
4141
4142 } else {
4143 /* ATA PIO protocol */
4144 if (unlikely((status & ATA_DRQ) == 0)) {
4145 /* handle BSY=0, DRQ=0 as error */
Albert Lee3655d1d2006-05-19 11:43:04 +08004146 if (likely(status & (ATA_ERR | ATA_DF)))
4147 /* device stops HSM for abort/error */
4148 qc->err_mask |= AC_ERR_DEV;
4149 else
4150 /* HSM violation. Let EH handle this */
4151 qc->err_mask |= AC_ERR_HSM;
4152
Albert Leee2cec772006-03-25 17:43:49 +08004153 ap->hsm_task_state = HSM_ST_ERR;
4154 goto fsm_start;
4155 }
4156
Albert Leeeee6c322006-04-01 17:38:43 +08004157 /* For PIO reads, some devices may ask for
4158 * data transfer (DRQ=1) alone with ERR=1.
4159 * We respect DRQ here and transfer one
4160 * block of junk data before changing the
4161 * hsm_task_state to HSM_ST_ERR.
4162 *
4163 * For PIO writes, ERR=1 DRQ=1 doesn't make
4164 * sense since the data block has been
4165 * transferred to the device.
Albert Lee71601952006-03-25 18:11:12 +08004166 */
4167 if (unlikely(status & (ATA_ERR | ATA_DF))) {
Albert Lee71601952006-03-25 18:11:12 +08004168 /* data might be corrputed */
4169 qc->err_mask |= AC_ERR_DEV;
Albert Leeeee6c322006-04-01 17:38:43 +08004170
4171 if (!(qc->tf.flags & ATA_TFLAG_WRITE)) {
4172 ata_pio_sectors(qc);
4173 ata_altstatus(ap);
4174 status = ata_wait_idle(ap);
4175 }
4176
Albert Lee3655d1d2006-05-19 11:43:04 +08004177 if (status & (ATA_BUSY | ATA_DRQ))
4178 qc->err_mask |= AC_ERR_HSM;
4179
Albert Leeeee6c322006-04-01 17:38:43 +08004180 /* ata_pio_sectors() might change the
4181 * state to HSM_ST_LAST. so, the state
4182 * is changed after ata_pio_sectors().
4183 */
4184 ap->hsm_task_state = HSM_ST_ERR;
4185 goto fsm_start;
Albert Lee71601952006-03-25 18:11:12 +08004186 }
4187
Albert Leee2cec772006-03-25 17:43:49 +08004188 ata_pio_sectors(qc);
4189
4190 if (ap->hsm_task_state == HSM_ST_LAST &&
4191 (!(qc->tf.flags & ATA_TFLAG_WRITE))) {
4192 /* all data read */
4193 ata_altstatus(ap);
Albert Lee52a32202006-03-25 18:18:15 +08004194 status = ata_wait_idle(ap);
Albert Leee2cec772006-03-25 17:43:49 +08004195 goto fsm_start;
4196 }
4197 }
4198
4199 ata_altstatus(ap); /* flush */
Albert Leebb5cb292006-03-25 17:48:02 +08004200 poll_next = 1;
Albert Leee2cec772006-03-25 17:43:49 +08004201 break;
4202
4203 case HSM_ST_LAST:
Albert Lee6912ccd2006-03-25 17:45:49 +08004204 if (unlikely(!ata_ok(status))) {
4205 qc->err_mask |= __ac_err_mask(status);
Albert Leee2cec772006-03-25 17:43:49 +08004206 ap->hsm_task_state = HSM_ST_ERR;
4207 goto fsm_start;
4208 }
4209
4210 /* no more data to transfer */
Albert Lee4332a772006-04-03 17:43:24 +08004211 DPRINTK("ata%u: dev %u command complete, drv_stat 0x%x\n",
4212 ap->id, qc->dev->devno, status);
Albert Leee2cec772006-03-25 17:43:49 +08004213
Albert Lee6912ccd2006-03-25 17:45:49 +08004214 WARN_ON(qc->err_mask);
4215
Albert Leee2cec772006-03-25 17:43:49 +08004216 ap->hsm_task_state = HSM_ST_IDLE;
4217
4218 /* complete taskfile transaction */
Tejun Heoc17ea202006-05-15 20:59:29 +09004219 ata_hsm_qc_complete(qc, in_wq);
Albert Leebb5cb292006-03-25 17:48:02 +08004220
4221 poll_next = 0;
Albert Leee2cec772006-03-25 17:43:49 +08004222 break;
4223
4224 case HSM_ST_ERR:
Albert Leee2cec772006-03-25 17:43:49 +08004225 /* make sure qc->err_mask is available to
4226 * know what's wrong and recover
4227 */
4228 WARN_ON(qc->err_mask == 0);
4229
4230 ap->hsm_task_state = HSM_ST_IDLE;
Albert Leebb5cb292006-03-25 17:48:02 +08004231
Albert Lee999bb6f2006-03-25 18:07:48 +08004232 /* complete taskfile transaction */
Tejun Heoc17ea202006-05-15 20:59:29 +09004233 ata_hsm_qc_complete(qc, in_wq);
Albert Leebb5cb292006-03-25 17:48:02 +08004234
4235 poll_next = 0;
Albert Leee2cec772006-03-25 17:43:49 +08004236 break;
4237 default:
Albert Leebb5cb292006-03-25 17:48:02 +08004238 poll_next = 0;
Albert Lee6912ccd2006-03-25 17:45:49 +08004239 BUG();
Albert Leee2cec772006-03-25 17:43:49 +08004240 }
4241
Albert Leebb5cb292006-03-25 17:48:02 +08004242 return poll_next;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004243}
4244
4245static void ata_pio_task(void *_data)
4246{
Tejun Heoc91af2c2006-04-02 18:51:53 +09004247 struct ata_queued_cmd *qc = _data;
4248 struct ata_port *ap = qc->ap;
Albert Leea1af3732006-03-25 17:50:15 +08004249 u8 status;
4250 int poll_next;
Jeff Garzik7fb6ec22005-09-16 06:01:48 -04004251
4252fsm_start:
Albert Leea1af3732006-03-25 17:50:15 +08004253 WARN_ON(ap->hsm_task_state == HSM_ST_IDLE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004254
Albert Leea1af3732006-03-25 17:50:15 +08004255 /*
4256 * This is purely heuristic. This is a fast path.
4257 * Sometimes when we enter, BSY will be cleared in
4258 * a chk-status or two. If not, the drive is probably seeking
4259 * or something. Snooze for a couple msecs, then
4260 * chk-status again. If still busy, queue delayed work.
4261 */
4262 status = ata_busy_wait(ap, ATA_BUSY, 5);
4263 if (status & ATA_BUSY) {
4264 msleep(2);
4265 status = ata_busy_wait(ap, ATA_BUSY, 10);
4266 if (status & ATA_BUSY) {
Albert Lee31ce6da2006-04-03 18:31:44 +08004267 ata_port_queue_task(ap, ata_pio_task, qc, ATA_SHORT_PAUSE);
Albert Leea1af3732006-03-25 17:50:15 +08004268 return;
4269 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07004270 }
4271
Albert Leea1af3732006-03-25 17:50:15 +08004272 /* move the HSM */
4273 poll_next = ata_hsm_move(ap, qc, status, 1);
4274
4275 /* another command or interrupt handler
4276 * may be running at this point.
4277 */
4278 if (poll_next)
Jeff Garzik7fb6ec22005-09-16 06:01:48 -04004279 goto fsm_start;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004280}
4281
Linus Torvalds1da177e2005-04-16 15:20:36 -07004282/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07004283 * ata_qc_new - Request an available ATA command, for queueing
4284 * @ap: Port associated with device @dev
4285 * @dev: Device from whom we request an available command structure
4286 *
4287 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04004288 * None.
Linus Torvalds1da177e2005-04-16 15:20:36 -07004289 */
4290
4291static struct ata_queued_cmd *ata_qc_new(struct ata_port *ap)
4292{
4293 struct ata_queued_cmd *qc = NULL;
4294 unsigned int i;
4295
Tejun Heoe3180492006-05-15 20:58:09 +09004296 /* no command while frozen */
4297 if (unlikely(ap->flags & ATA_FLAG_FROZEN))
4298 return NULL;
4299
Tejun Heo2ab7db12006-05-15 20:58:02 +09004300 /* the last tag is reserved for internal command. */
4301 for (i = 0; i < ATA_MAX_QUEUE - 1; i++)
Tejun Heo6cec4a32006-05-15 21:03:41 +09004302 if (!test_and_set_bit(i, &ap->qc_allocated)) {
Tejun Heof69499f2006-05-15 20:58:03 +09004303 qc = __ata_qc_from_tag(ap, i);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004304 break;
4305 }
4306
4307 if (qc)
4308 qc->tag = i;
4309
4310 return qc;
4311}
4312
4313/**
4314 * ata_qc_new_init - Request an available ATA command, and initialize it
Linus Torvalds1da177e2005-04-16 15:20:36 -07004315 * @dev: Device from whom we request an available command structure
4316 *
4317 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04004318 * None.
Linus Torvalds1da177e2005-04-16 15:20:36 -07004319 */
4320
Tejun Heo3373efd2006-05-15 20:57:53 +09004321struct ata_queued_cmd *ata_qc_new_init(struct ata_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004322{
Tejun Heo3373efd2006-05-15 20:57:53 +09004323 struct ata_port *ap = dev->ap;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004324 struct ata_queued_cmd *qc;
4325
4326 qc = ata_qc_new(ap);
4327 if (qc) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07004328 qc->scsicmd = NULL;
4329 qc->ap = ap;
4330 qc->dev = dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004331
Jeff Garzik2c13b7c2005-11-14 14:14:16 -05004332 ata_qc_reinit(qc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004333 }
4334
4335 return qc;
4336}
4337
Linus Torvalds1da177e2005-04-16 15:20:36 -07004338/**
4339 * ata_qc_free - free unused ata_queued_cmd
4340 * @qc: Command to complete
4341 *
4342 * Designed to free unused ata_queued_cmd object
4343 * in case something prevents using it.
4344 *
4345 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04004346 * spin_lock_irqsave(host_set lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004347 */
4348void ata_qc_free(struct ata_queued_cmd *qc)
4349{
Tejun Heo4ba946e2006-01-23 13:09:36 +09004350 struct ata_port *ap = qc->ap;
4351 unsigned int tag;
4352
Tejun Heoa46314742006-02-11 19:11:13 +09004353 WARN_ON(qc == NULL); /* ata_qc_from_tag _might_ return NULL */
Linus Torvalds1da177e2005-04-16 15:20:36 -07004354
Tejun Heo4ba946e2006-01-23 13:09:36 +09004355 qc->flags = 0;
4356 tag = qc->tag;
4357 if (likely(ata_tag_valid(tag))) {
Tejun Heo4ba946e2006-01-23 13:09:36 +09004358 qc->tag = ATA_TAG_POISON;
Tejun Heo6cec4a32006-05-15 21:03:41 +09004359 clear_bit(tag, &ap->qc_allocated);
Tejun Heo4ba946e2006-01-23 13:09:36 +09004360 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07004361}
4362
Tejun Heo76014422006-02-11 15:13:49 +09004363void __ata_qc_complete(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004364{
Tejun Heodedaf2b2006-05-15 21:03:43 +09004365 struct ata_port *ap = qc->ap;
4366
Tejun Heoa46314742006-02-11 19:11:13 +09004367 WARN_ON(qc == NULL); /* ata_qc_from_tag _might_ return NULL */
4368 WARN_ON(!(qc->flags & ATA_QCFLAG_ACTIVE));
Linus Torvalds1da177e2005-04-16 15:20:36 -07004369
4370 if (likely(qc->flags & ATA_QCFLAG_DMAMAP))
4371 ata_sg_clean(qc);
4372
Tejun Heo7401abf2006-05-15 20:57:32 +09004373 /* command should be marked inactive atomically with qc completion */
Tejun Heodedaf2b2006-05-15 21:03:43 +09004374 if (qc->tf.protocol == ATA_PROT_NCQ)
4375 ap->sactive &= ~(1 << qc->tag);
4376 else
4377 ap->active_tag = ATA_TAG_POISON;
Tejun Heo7401abf2006-05-15 20:57:32 +09004378
Albert Lee3f3791d2005-08-16 14:25:38 +08004379 /* atapi: mark qc as inactive to prevent the interrupt handler
4380 * from completing the command twice later, before the error handler
4381 * is called. (when rc != 0 and atapi request sense is needed)
4382 */
4383 qc->flags &= ~ATA_QCFLAG_ACTIVE;
Tejun Heodedaf2b2006-05-15 21:03:43 +09004384 ap->qc_active &= ~(1 << qc->tag);
Albert Lee3f3791d2005-08-16 14:25:38 +08004385
Linus Torvalds1da177e2005-04-16 15:20:36 -07004386 /* call completion callback */
Tejun Heo77853bf2006-01-23 13:09:36 +09004387 qc->complete_fn(qc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004388}
4389
Tejun Heof686bcb2006-05-15 20:58:05 +09004390/**
4391 * ata_qc_complete - Complete an active ATA command
4392 * @qc: Command to complete
4393 * @err_mask: ATA Status register contents
4394 *
4395 * Indicate to the mid and upper layers that an ATA
4396 * command has completed, with either an ok or not-ok status.
4397 *
4398 * LOCKING:
4399 * spin_lock_irqsave(host_set lock)
4400 */
4401void ata_qc_complete(struct ata_queued_cmd *qc)
4402{
4403 struct ata_port *ap = qc->ap;
4404
4405 /* XXX: New EH and old EH use different mechanisms to
4406 * synchronize EH with regular execution path.
4407 *
4408 * In new EH, a failed qc is marked with ATA_QCFLAG_FAILED.
4409 * Normal execution path is responsible for not accessing a
4410 * failed qc. libata core enforces the rule by returning NULL
4411 * from ata_qc_from_tag() for failed qcs.
4412 *
4413 * Old EH depends on ata_qc_complete() nullifying completion
4414 * requests if ATA_QCFLAG_EH_SCHEDULED is set. Old EH does
4415 * not synchronize with interrupt handler. Only PIO task is
4416 * taken care of.
4417 */
4418 if (ap->ops->error_handler) {
4419 WARN_ON(ap->flags & ATA_FLAG_FROZEN);
4420
4421 if (unlikely(qc->err_mask))
4422 qc->flags |= ATA_QCFLAG_FAILED;
4423
4424 if (unlikely(qc->flags & ATA_QCFLAG_FAILED)) {
4425 if (!ata_tag_internal(qc->tag)) {
4426 /* always fill result TF for failed qc */
4427 ap->ops->tf_read(ap, &qc->result_tf);
4428 ata_qc_schedule_eh(qc);
4429 return;
4430 }
4431 }
4432
4433 /* read result TF if requested */
4434 if (qc->flags & ATA_QCFLAG_RESULT_TF)
4435 ap->ops->tf_read(ap, &qc->result_tf);
4436
4437 __ata_qc_complete(qc);
4438 } else {
4439 if (qc->flags & ATA_QCFLAG_EH_SCHEDULED)
4440 return;
4441
4442 /* read result TF if failed or requested */
4443 if (qc->err_mask || qc->flags & ATA_QCFLAG_RESULT_TF)
4444 ap->ops->tf_read(ap, &qc->result_tf);
4445
4446 __ata_qc_complete(qc);
4447 }
4448}
4449
Tejun Heodedaf2b2006-05-15 21:03:43 +09004450/**
4451 * ata_qc_complete_multiple - Complete multiple qcs successfully
4452 * @ap: port in question
4453 * @qc_active: new qc_active mask
4454 * @finish_qc: LLDD callback invoked before completing a qc
4455 *
4456 * Complete in-flight commands. This functions is meant to be
4457 * called from low-level driver's interrupt routine to complete
4458 * requests normally. ap->qc_active and @qc_active is compared
4459 * and commands are completed accordingly.
4460 *
4461 * LOCKING:
4462 * spin_lock_irqsave(host_set lock)
4463 *
4464 * RETURNS:
4465 * Number of completed commands on success, -errno otherwise.
4466 */
4467int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active,
4468 void (*finish_qc)(struct ata_queued_cmd *))
4469{
4470 int nr_done = 0;
4471 u32 done_mask;
4472 int i;
4473
4474 done_mask = ap->qc_active ^ qc_active;
4475
4476 if (unlikely(done_mask & qc_active)) {
4477 ata_port_printk(ap, KERN_ERR, "illegal qc_active transition "
4478 "(%08x->%08x)\n", ap->qc_active, qc_active);
4479 return -EINVAL;
4480 }
4481
4482 for (i = 0; i < ATA_MAX_QUEUE; i++) {
4483 struct ata_queued_cmd *qc;
4484
4485 if (!(done_mask & (1 << i)))
4486 continue;
4487
4488 if ((qc = ata_qc_from_tag(ap, i))) {
4489 if (finish_qc)
4490 finish_qc(qc);
4491 ata_qc_complete(qc);
4492 nr_done++;
4493 }
4494 }
4495
4496 return nr_done;
4497}
4498
Linus Torvalds1da177e2005-04-16 15:20:36 -07004499static inline int ata_should_dma_map(struct ata_queued_cmd *qc)
4500{
4501 struct ata_port *ap = qc->ap;
4502
4503 switch (qc->tf.protocol) {
Tejun Heo3dc1d882006-05-15 21:03:45 +09004504 case ATA_PROT_NCQ:
Linus Torvalds1da177e2005-04-16 15:20:36 -07004505 case ATA_PROT_DMA:
4506 case ATA_PROT_ATAPI_DMA:
4507 return 1;
4508
4509 case ATA_PROT_ATAPI:
4510 case ATA_PROT_PIO:
Linus Torvalds1da177e2005-04-16 15:20:36 -07004511 if (ap->flags & ATA_FLAG_PIO_DMA)
4512 return 1;
4513
4514 /* fall through */
4515
4516 default:
4517 return 0;
4518 }
4519
4520 /* never reached */
4521}
4522
4523/**
4524 * ata_qc_issue - issue taskfile to device
4525 * @qc: command to issue to device
4526 *
4527 * Prepare an ATA command to submission to device.
4528 * This includes mapping the data into a DMA-able
4529 * area, filling in the S/G table, and finally
4530 * writing the taskfile to hardware, starting the command.
4531 *
4532 * LOCKING:
4533 * spin_lock_irqsave(host_set lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004534 */
Tejun Heo8e0e6942006-03-31 20:41:11 +09004535void ata_qc_issue(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004536{
4537 struct ata_port *ap = qc->ap;
4538
Tejun Heodedaf2b2006-05-15 21:03:43 +09004539 /* Make sure only one non-NCQ command is outstanding. The
4540 * check is skipped for old EH because it reuses active qc to
4541 * request ATAPI sense.
4542 */
4543 WARN_ON(ap->ops->error_handler && ata_tag_valid(ap->active_tag));
4544
4545 if (qc->tf.protocol == ATA_PROT_NCQ) {
4546 WARN_ON(ap->sactive & (1 << qc->tag));
4547 ap->sactive |= 1 << qc->tag;
4548 } else {
4549 WARN_ON(ap->sactive);
4550 ap->active_tag = qc->tag;
4551 }
4552
Tejun Heoe4a70e72006-03-31 20:36:47 +09004553 qc->flags |= ATA_QCFLAG_ACTIVE;
Tejun Heodedaf2b2006-05-15 21:03:43 +09004554 ap->qc_active |= 1 << qc->tag;
Tejun Heoe4a70e72006-03-31 20:36:47 +09004555
Linus Torvalds1da177e2005-04-16 15:20:36 -07004556 if (ata_should_dma_map(qc)) {
4557 if (qc->flags & ATA_QCFLAG_SG) {
4558 if (ata_sg_setup(qc))
Tejun Heo8e436af2006-01-23 13:09:36 +09004559 goto sg_err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004560 } else if (qc->flags & ATA_QCFLAG_SINGLE) {
4561 if (ata_sg_setup_one(qc))
Tejun Heo8e436af2006-01-23 13:09:36 +09004562 goto sg_err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004563 }
4564 } else {
4565 qc->flags &= ~ATA_QCFLAG_DMAMAP;
4566 }
4567
4568 ap->ops->qc_prep(qc);
4569
Tejun Heo8e0e6942006-03-31 20:41:11 +09004570 qc->err_mask |= ap->ops->qc_issue(qc);
4571 if (unlikely(qc->err_mask))
4572 goto err;
4573 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004574
Tejun Heo8e436af2006-01-23 13:09:36 +09004575sg_err:
4576 qc->flags &= ~ATA_QCFLAG_DMAMAP;
Tejun Heo8e0e6942006-03-31 20:41:11 +09004577 qc->err_mask |= AC_ERR_SYSTEM;
4578err:
4579 ata_qc_complete(qc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004580}
4581
4582/**
4583 * ata_qc_issue_prot - issue taskfile to device in proto-dependent manner
4584 * @qc: command to issue to device
4585 *
4586 * Using various libata functions and hooks, this function
4587 * starts an ATA command. ATA commands are grouped into
4588 * classes called "protocols", and issuing each type of protocol
4589 * is slightly different.
4590 *
Edward Falk0baab862005-06-02 18:17:13 -04004591 * May be used as the qc_issue() entry in ata_port_operations.
4592 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07004593 * LOCKING:
4594 * spin_lock_irqsave(host_set lock)
4595 *
4596 * RETURNS:
Tejun Heo9a3d9eb2006-01-23 13:09:36 +09004597 * Zero on success, AC_ERR_* mask on failure
Linus Torvalds1da177e2005-04-16 15:20:36 -07004598 */
4599
Tejun Heo9a3d9eb2006-01-23 13:09:36 +09004600unsigned int ata_qc_issue_prot(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004601{
4602 struct ata_port *ap = qc->ap;
4603
Albert Leee50362e2005-09-27 17:39:50 +08004604 /* Use polling pio if the LLD doesn't handle
4605 * interrupt driven pio and atapi CDB interrupt.
4606 */
4607 if (ap->flags & ATA_FLAG_PIO_POLLING) {
4608 switch (qc->tf.protocol) {
4609 case ATA_PROT_PIO:
4610 case ATA_PROT_ATAPI:
4611 case ATA_PROT_ATAPI_NODATA:
4612 qc->tf.flags |= ATA_TFLAG_POLLING;
4613 break;
4614 case ATA_PROT_ATAPI_DMA:
4615 if (qc->dev->flags & ATA_DFLAG_CDB_INTR)
Albert Lee3a778272006-06-22 13:00:25 +08004616 /* see ata_dma_blacklisted() */
Albert Leee50362e2005-09-27 17:39:50 +08004617 BUG();
4618 break;
4619 default:
4620 break;
4621 }
4622 }
4623
Albert Lee312f7da2005-09-27 17:38:03 +08004624 /* select the device */
Linus Torvalds1da177e2005-04-16 15:20:36 -07004625 ata_dev_select(ap, qc->dev->devno, 1, 0);
4626
Albert Lee312f7da2005-09-27 17:38:03 +08004627 /* start the command */
Linus Torvalds1da177e2005-04-16 15:20:36 -07004628 switch (qc->tf.protocol) {
4629 case ATA_PROT_NODATA:
Albert Lee312f7da2005-09-27 17:38:03 +08004630 if (qc->tf.flags & ATA_TFLAG_POLLING)
4631 ata_qc_set_polling(qc);
4632
Jeff Garzike5338252005-10-30 21:37:17 -05004633 ata_tf_to_host(ap, &qc->tf);
Albert Lee312f7da2005-09-27 17:38:03 +08004634 ap->hsm_task_state = HSM_ST_LAST;
4635
4636 if (qc->tf.flags & ATA_TFLAG_POLLING)
Albert Lee31ce6da2006-04-03 18:31:44 +08004637 ata_port_queue_task(ap, ata_pio_task, qc, 0);
Albert Lee312f7da2005-09-27 17:38:03 +08004638
Linus Torvalds1da177e2005-04-16 15:20:36 -07004639 break;
4640
4641 case ATA_PROT_DMA:
Jeff Garzik587005d2006-02-11 18:17:32 -05004642 WARN_ON(qc->tf.flags & ATA_TFLAG_POLLING);
Albert Lee312f7da2005-09-27 17:38:03 +08004643
Linus Torvalds1da177e2005-04-16 15:20:36 -07004644 ap->ops->tf_load(ap, &qc->tf); /* load tf registers */
4645 ap->ops->bmdma_setup(qc); /* set up bmdma */
4646 ap->ops->bmdma_start(qc); /* initiate bmdma */
Albert Lee312f7da2005-09-27 17:38:03 +08004647 ap->hsm_task_state = HSM_ST_LAST;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004648 break;
4649
Albert Lee312f7da2005-09-27 17:38:03 +08004650 case ATA_PROT_PIO:
4651 if (qc->tf.flags & ATA_TFLAG_POLLING)
4652 ata_qc_set_polling(qc);
4653
Jeff Garzike5338252005-10-30 21:37:17 -05004654 ata_tf_to_host(ap, &qc->tf);
Albert Lee312f7da2005-09-27 17:38:03 +08004655
Albert Lee54f00382005-09-30 19:14:19 +08004656 if (qc->tf.flags & ATA_TFLAG_WRITE) {
4657 /* PIO data out protocol */
4658 ap->hsm_task_state = HSM_ST_FIRST;
Albert Lee31ce6da2006-04-03 18:31:44 +08004659 ata_port_queue_task(ap, ata_pio_task, qc, 0);
Albert Lee54f00382005-09-30 19:14:19 +08004660
4661 /* always send first data block using
Albert Leee27486d2005-11-01 19:24:49 +08004662 * the ata_pio_task() codepath.
Albert Lee54f00382005-09-30 19:14:19 +08004663 */
Albert Lee312f7da2005-09-27 17:38:03 +08004664 } else {
Albert Lee54f00382005-09-30 19:14:19 +08004665 /* PIO data in protocol */
4666 ap->hsm_task_state = HSM_ST;
Albert Lee312f7da2005-09-27 17:38:03 +08004667
Albert Lee54f00382005-09-30 19:14:19 +08004668 if (qc->tf.flags & ATA_TFLAG_POLLING)
Albert Lee31ce6da2006-04-03 18:31:44 +08004669 ata_port_queue_task(ap, ata_pio_task, qc, 0);
Albert Lee312f7da2005-09-27 17:38:03 +08004670
Albert Lee54f00382005-09-30 19:14:19 +08004671 /* if polling, ata_pio_task() handles the rest.
4672 * otherwise, interrupt handler takes over from here.
4673 */
Albert Lee312f7da2005-09-27 17:38:03 +08004674 }
4675
Linus Torvalds1da177e2005-04-16 15:20:36 -07004676 break;
4677
4678 case ATA_PROT_ATAPI:
Linus Torvalds1da177e2005-04-16 15:20:36 -07004679 case ATA_PROT_ATAPI_NODATA:
Albert Lee312f7da2005-09-27 17:38:03 +08004680 if (qc->tf.flags & ATA_TFLAG_POLLING)
4681 ata_qc_set_polling(qc);
4682
Jeff Garzike5338252005-10-30 21:37:17 -05004683 ata_tf_to_host(ap, &qc->tf);
Jeff Garzikf6ef65e2006-01-27 02:45:00 -05004684
Albert Lee312f7da2005-09-27 17:38:03 +08004685 ap->hsm_task_state = HSM_ST_FIRST;
4686
4687 /* send cdb by polling if no cdb interrupt */
4688 if ((!(qc->dev->flags & ATA_DFLAG_CDB_INTR)) ||
4689 (qc->tf.flags & ATA_TFLAG_POLLING))
Albert Lee31ce6da2006-04-03 18:31:44 +08004690 ata_port_queue_task(ap, ata_pio_task, qc, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004691 break;
4692
4693 case ATA_PROT_ATAPI_DMA:
Jeff Garzik587005d2006-02-11 18:17:32 -05004694 WARN_ON(qc->tf.flags & ATA_TFLAG_POLLING);
Albert Lee312f7da2005-09-27 17:38:03 +08004695
Linus Torvalds1da177e2005-04-16 15:20:36 -07004696 ap->ops->tf_load(ap, &qc->tf); /* load tf registers */
4697 ap->ops->bmdma_setup(qc); /* set up bmdma */
Albert Lee312f7da2005-09-27 17:38:03 +08004698 ap->hsm_task_state = HSM_ST_FIRST;
4699
4700 /* send cdb by polling if no cdb interrupt */
4701 if (!(qc->dev->flags & ATA_DFLAG_CDB_INTR))
Albert Lee31ce6da2006-04-03 18:31:44 +08004702 ata_port_queue_task(ap, ata_pio_task, qc, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004703 break;
4704
4705 default:
4706 WARN_ON(1);
Tejun Heo9a3d9eb2006-01-23 13:09:36 +09004707 return AC_ERR_SYSTEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004708 }
4709
4710 return 0;
4711}
4712
4713/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07004714 * ata_host_intr - Handle host interrupt for given (port, task)
4715 * @ap: Port on which interrupt arrived (possibly...)
4716 * @qc: Taskfile currently active in engine
4717 *
4718 * Handle host interrupt for given queued command. Currently,
4719 * only DMA interrupts are handled. All other commands are
4720 * handled via polling with interrupts disabled (nIEN bit).
4721 *
4722 * LOCKING:
4723 * spin_lock_irqsave(host_set lock)
4724 *
4725 * RETURNS:
4726 * One if interrupt was handled, zero if not (shared irq).
4727 */
4728
4729inline unsigned int ata_host_intr (struct ata_port *ap,
4730 struct ata_queued_cmd *qc)
4731{
Albert Lee312f7da2005-09-27 17:38:03 +08004732 u8 status, host_stat = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004733
Albert Lee312f7da2005-09-27 17:38:03 +08004734 VPRINTK("ata%u: protocol %d task_state %d\n",
4735 ap->id, qc->tf.protocol, ap->hsm_task_state);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004736
Albert Lee312f7da2005-09-27 17:38:03 +08004737 /* Check whether we are expecting interrupt in this state */
4738 switch (ap->hsm_task_state) {
4739 case HSM_ST_FIRST:
Albert Lee6912ccd2006-03-25 17:45:49 +08004740 /* Some pre-ATAPI-4 devices assert INTRQ
4741 * at this state when ready to receive CDB.
4742 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07004743
Albert Lee312f7da2005-09-27 17:38:03 +08004744 /* Check the ATA_DFLAG_CDB_INTR flag is enough here.
4745 * The flag was turned on only for atapi devices.
4746 * No need to check is_atapi_taskfile(&qc->tf) again.
4747 */
4748 if (!(qc->dev->flags & ATA_DFLAG_CDB_INTR))
Linus Torvalds1da177e2005-04-16 15:20:36 -07004749 goto idle_irq;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004750 break;
Albert Lee312f7da2005-09-27 17:38:03 +08004751 case HSM_ST_LAST:
4752 if (qc->tf.protocol == ATA_PROT_DMA ||
4753 qc->tf.protocol == ATA_PROT_ATAPI_DMA) {
4754 /* check status of DMA engine */
4755 host_stat = ap->ops->bmdma_status(ap);
4756 VPRINTK("ata%u: host_stat 0x%X\n", ap->id, host_stat);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004757
Albert Lee312f7da2005-09-27 17:38:03 +08004758 /* if it's not our irq... */
4759 if (!(host_stat & ATA_DMA_INTR))
4760 goto idle_irq;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004761
Albert Lee312f7da2005-09-27 17:38:03 +08004762 /* before we do anything else, clear DMA-Start bit */
4763 ap->ops->bmdma_stop(qc);
Albert Leea4f16612005-12-26 16:40:53 +08004764
4765 if (unlikely(host_stat & ATA_DMA_ERR)) {
4766 /* error when transfering data to/from memory */
4767 qc->err_mask |= AC_ERR_HOST_BUS;
4768 ap->hsm_task_state = HSM_ST_ERR;
4769 }
Albert Lee312f7da2005-09-27 17:38:03 +08004770 }
4771 break;
4772 case HSM_ST:
4773 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004774 default:
4775 goto idle_irq;
4776 }
4777
Albert Lee312f7da2005-09-27 17:38:03 +08004778 /* check altstatus */
4779 status = ata_altstatus(ap);
4780 if (status & ATA_BUSY)
4781 goto idle_irq;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004782
Albert Lee312f7da2005-09-27 17:38:03 +08004783 /* check main status, clearing INTRQ */
4784 status = ata_chk_status(ap);
4785 if (unlikely(status & ATA_BUSY))
4786 goto idle_irq;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004787
Albert Lee312f7da2005-09-27 17:38:03 +08004788 /* ack bmdma irq events */
4789 ap->ops->irq_clear(ap);
4790
Albert Leebb5cb292006-03-25 17:48:02 +08004791 ata_hsm_move(ap, qc, status, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004792 return 1; /* irq handled */
4793
4794idle_irq:
4795 ap->stats.idle_irq++;
4796
4797#ifdef ATA_IRQ_TRAP
4798 if ((ap->stats.idle_irq % 1000) == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07004799 ata_irq_ack(ap, 0); /* debug trap */
Tejun Heof15a1da2006-05-15 20:57:56 +09004800 ata_port_printk(ap, KERN_WARNING, "irq trap\n");
Alan Cox23cfce82006-03-21 16:06:53 +00004801 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004802 }
4803#endif
4804 return 0; /* irq not handled */
4805}
4806
4807/**
4808 * ata_interrupt - Default ATA host interrupt handler
Jeff Garzik0cba6322005-05-30 19:49:12 -04004809 * @irq: irq line (unused)
4810 * @dev_instance: pointer to our ata_host_set information structure
Linus Torvalds1da177e2005-04-16 15:20:36 -07004811 * @regs: unused
4812 *
Jeff Garzik0cba6322005-05-30 19:49:12 -04004813 * Default interrupt handler for PCI IDE devices. Calls
4814 * ata_host_intr() for each port that is not disabled.
4815 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07004816 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04004817 * Obtains host_set lock during operation.
Linus Torvalds1da177e2005-04-16 15:20:36 -07004818 *
4819 * RETURNS:
Jeff Garzik0cba6322005-05-30 19:49:12 -04004820 * IRQ_NONE or IRQ_HANDLED.
Linus Torvalds1da177e2005-04-16 15:20:36 -07004821 */
4822
4823irqreturn_t ata_interrupt (int irq, void *dev_instance, struct pt_regs *regs)
4824{
4825 struct ata_host_set *host_set = dev_instance;
4826 unsigned int i;
4827 unsigned int handled = 0;
4828 unsigned long flags;
4829
4830 /* TODO: make _irqsave conditional on x86 PCI IDE legacy mode */
4831 spin_lock_irqsave(&host_set->lock, flags);
4832
4833 for (i = 0; i < host_set->n_ports; i++) {
4834 struct ata_port *ap;
4835
4836 ap = host_set->ports[i];
Tejun Heoc1389502005-08-22 14:59:24 +09004837 if (ap &&
Jeff Garzik029f5462006-04-02 10:30:40 -04004838 !(ap->flags & ATA_FLAG_DISABLED)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07004839 struct ata_queued_cmd *qc;
4840
4841 qc = ata_qc_from_tag(ap, ap->active_tag);
Albert Lee312f7da2005-09-27 17:38:03 +08004842 if (qc && (!(qc->tf.flags & ATA_TFLAG_POLLING)) &&
Albert Lee21b1ed72005-04-29 17:34:59 +08004843 (qc->flags & ATA_QCFLAG_ACTIVE))
Linus Torvalds1da177e2005-04-16 15:20:36 -07004844 handled |= ata_host_intr(ap, qc);
4845 }
4846 }
4847
4848 spin_unlock_irqrestore(&host_set->lock, flags);
4849
4850 return IRQ_RETVAL(handled);
4851}
4852
Tejun Heo34bf2172006-05-15 20:57:46 +09004853/**
4854 * sata_scr_valid - test whether SCRs are accessible
4855 * @ap: ATA port to test SCR accessibility for
4856 *
4857 * Test whether SCRs are accessible for @ap.
4858 *
4859 * LOCKING:
4860 * None.
4861 *
4862 * RETURNS:
4863 * 1 if SCRs are accessible, 0 otherwise.
4864 */
4865int sata_scr_valid(struct ata_port *ap)
4866{
4867 return ap->cbl == ATA_CBL_SATA && ap->ops->scr_read;
4868}
4869
4870/**
4871 * sata_scr_read - read SCR register of the specified port
4872 * @ap: ATA port to read SCR for
4873 * @reg: SCR to read
4874 * @val: Place to store read value
4875 *
4876 * Read SCR register @reg of @ap into *@val. This function is
4877 * guaranteed to succeed if the cable type of the port is SATA
4878 * and the port implements ->scr_read.
4879 *
4880 * LOCKING:
4881 * None.
4882 *
4883 * RETURNS:
4884 * 0 on success, negative errno on failure.
4885 */
4886int sata_scr_read(struct ata_port *ap, int reg, u32 *val)
4887{
4888 if (sata_scr_valid(ap)) {
4889 *val = ap->ops->scr_read(ap, reg);
4890 return 0;
4891 }
4892 return -EOPNOTSUPP;
4893}
4894
4895/**
4896 * sata_scr_write - write SCR register of the specified port
4897 * @ap: ATA port to write SCR for
4898 * @reg: SCR to write
4899 * @val: value to write
4900 *
4901 * Write @val to SCR register @reg of @ap. This function is
4902 * guaranteed to succeed if the cable type of the port is SATA
4903 * and the port implements ->scr_read.
4904 *
4905 * LOCKING:
4906 * None.
4907 *
4908 * RETURNS:
4909 * 0 on success, negative errno on failure.
4910 */
4911int sata_scr_write(struct ata_port *ap, int reg, u32 val)
4912{
4913 if (sata_scr_valid(ap)) {
4914 ap->ops->scr_write(ap, reg, val);
4915 return 0;
4916 }
4917 return -EOPNOTSUPP;
4918}
4919
4920/**
4921 * sata_scr_write_flush - write SCR register of the specified port and flush
4922 * @ap: ATA port to write SCR for
4923 * @reg: SCR to write
4924 * @val: value to write
4925 *
4926 * This function is identical to sata_scr_write() except that this
4927 * function performs flush after writing to the register.
4928 *
4929 * LOCKING:
4930 * None.
4931 *
4932 * RETURNS:
4933 * 0 on success, negative errno on failure.
4934 */
4935int sata_scr_write_flush(struct ata_port *ap, int reg, u32 val)
4936{
4937 if (sata_scr_valid(ap)) {
4938 ap->ops->scr_write(ap, reg, val);
4939 ap->ops->scr_read(ap, reg);
4940 return 0;
4941 }
4942 return -EOPNOTSUPP;
4943}
4944
4945/**
4946 * ata_port_online - test whether the given port is online
4947 * @ap: ATA port to test
4948 *
4949 * Test whether @ap is online. Note that this function returns 0
4950 * if online status of @ap cannot be obtained, so
4951 * ata_port_online(ap) != !ata_port_offline(ap).
4952 *
4953 * LOCKING:
4954 * None.
4955 *
4956 * RETURNS:
4957 * 1 if the port online status is available and online.
4958 */
4959int ata_port_online(struct ata_port *ap)
4960{
4961 u32 sstatus;
4962
4963 if (!sata_scr_read(ap, SCR_STATUS, &sstatus) && (sstatus & 0xf) == 0x3)
4964 return 1;
4965 return 0;
4966}
4967
4968/**
4969 * ata_port_offline - test whether the given port is offline
4970 * @ap: ATA port to test
4971 *
4972 * Test whether @ap is offline. Note that this function returns
4973 * 0 if offline status of @ap cannot be obtained, so
4974 * ata_port_online(ap) != !ata_port_offline(ap).
4975 *
4976 * LOCKING:
4977 * None.
4978 *
4979 * RETURNS:
4980 * 1 if the port offline status is available and offline.
4981 */
4982int ata_port_offline(struct ata_port *ap)
4983{
4984 u32 sstatus;
4985
4986 if (!sata_scr_read(ap, SCR_STATUS, &sstatus) && (sstatus & 0xf) != 0x3)
4987 return 1;
4988 return 0;
4989}
Edward Falk0baab862005-06-02 18:17:13 -04004990
Tejun Heo77b08fb2006-06-24 20:30:19 +09004991int ata_flush_cache(struct ata_device *dev)
Jens Axboe9b847542006-01-06 09:28:07 +01004992{
Tejun Heo977e6b92006-06-24 20:30:19 +09004993 unsigned int err_mask;
Jens Axboe9b847542006-01-06 09:28:07 +01004994 u8 cmd;
4995
4996 if (!ata_try_flush_cache(dev))
4997 return 0;
4998
4999 if (ata_id_has_flush_ext(dev->id))
5000 cmd = ATA_CMD_FLUSH_EXT;
5001 else
5002 cmd = ATA_CMD_FLUSH;
5003
Tejun Heo977e6b92006-06-24 20:30:19 +09005004 err_mask = ata_do_simple_cmd(dev, cmd);
5005 if (err_mask) {
5006 ata_dev_printk(dev, KERN_ERR, "failed to flush cache\n");
5007 return -EIO;
5008 }
5009
5010 return 0;
Jens Axboe9b847542006-01-06 09:28:07 +01005011}
5012
Tejun Heo3373efd2006-05-15 20:57:53 +09005013static int ata_standby_drive(struct ata_device *dev)
Jens Axboe9b847542006-01-06 09:28:07 +01005014{
Tejun Heo977e6b92006-06-24 20:30:19 +09005015 unsigned int err_mask;
5016
5017 err_mask = ata_do_simple_cmd(dev, ATA_CMD_STANDBYNOW1);
5018 if (err_mask) {
5019 ata_dev_printk(dev, KERN_ERR, "failed to standby drive "
5020 "(err_mask=0x%x)\n", err_mask);
5021 return -EIO;
5022 }
5023
5024 return 0;
Jens Axboe9b847542006-01-06 09:28:07 +01005025}
5026
Tejun Heo3373efd2006-05-15 20:57:53 +09005027static int ata_start_drive(struct ata_device *dev)
Jens Axboe9b847542006-01-06 09:28:07 +01005028{
Tejun Heo977e6b92006-06-24 20:30:19 +09005029 unsigned int err_mask;
5030
5031 err_mask = ata_do_simple_cmd(dev, ATA_CMD_IDLEIMMEDIATE);
5032 if (err_mask) {
5033 ata_dev_printk(dev, KERN_ERR, "failed to start drive "
5034 "(err_mask=0x%x)\n", err_mask);
5035 return -EIO;
5036 }
5037
5038 return 0;
Jens Axboe9b847542006-01-06 09:28:07 +01005039}
5040
5041/**
5042 * ata_device_resume - wakeup a previously suspended devices
Randy Dunlapc893a3a2006-01-28 13:15:32 -05005043 * @dev: the device to resume
Jens Axboe9b847542006-01-06 09:28:07 +01005044 *
5045 * Kick the drive back into action, by sending it an idle immediate
5046 * command and making sure its transfer mode matches between drive
5047 * and host.
5048 *
5049 */
Tejun Heo3373efd2006-05-15 20:57:53 +09005050int ata_device_resume(struct ata_device *dev)
Jens Axboe9b847542006-01-06 09:28:07 +01005051{
Tejun Heo3373efd2006-05-15 20:57:53 +09005052 struct ata_port *ap = dev->ap;
5053
Jens Axboe9b847542006-01-06 09:28:07 +01005054 if (ap->flags & ATA_FLAG_SUSPENDED) {
Tejun Heoe82cbdb2006-04-01 01:38:18 +09005055 struct ata_device *failed_dev;
Jeff Garzike42d7be2006-05-28 16:32:59 -04005056
Linus Torvalds1cca0eb2006-06-19 18:01:27 -07005057 ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT);
Mark Lord0737ac82006-05-28 11:28:00 -04005058 ata_busy_wait(ap, ATA_BUSY | ATA_DRQ, 200000);
Jeff Garzike42d7be2006-05-28 16:32:59 -04005059
Jens Axboe9b847542006-01-06 09:28:07 +01005060 ap->flags &= ~ATA_FLAG_SUSPENDED;
Tejun Heoe82cbdb2006-04-01 01:38:18 +09005061 while (ata_set_mode(ap, &failed_dev))
Tejun Heo3373efd2006-05-15 20:57:53 +09005062 ata_dev_disable(failed_dev);
Jens Axboe9b847542006-01-06 09:28:07 +01005063 }
Tejun Heoe1211e32006-04-01 01:38:18 +09005064 if (!ata_dev_enabled(dev))
Jens Axboe9b847542006-01-06 09:28:07 +01005065 return 0;
5066 if (dev->class == ATA_DEV_ATA)
Tejun Heo3373efd2006-05-15 20:57:53 +09005067 ata_start_drive(dev);
Jens Axboe9b847542006-01-06 09:28:07 +01005068
5069 return 0;
5070}
5071
5072/**
5073 * ata_device_suspend - prepare a device for suspend
Randy Dunlapc893a3a2006-01-28 13:15:32 -05005074 * @dev: the device to suspend
Randy Dunlape2a7f772006-05-18 10:50:18 -07005075 * @state: target power management state
Jens Axboe9b847542006-01-06 09:28:07 +01005076 *
5077 * Flush the cache on the drive, if appropriate, then issue a
5078 * standbynow command.
Jens Axboe9b847542006-01-06 09:28:07 +01005079 */
Tejun Heo3373efd2006-05-15 20:57:53 +09005080int ata_device_suspend(struct ata_device *dev, pm_message_t state)
Jens Axboe9b847542006-01-06 09:28:07 +01005081{
Tejun Heo3373efd2006-05-15 20:57:53 +09005082 struct ata_port *ap = dev->ap;
5083
Tejun Heoe1211e32006-04-01 01:38:18 +09005084 if (!ata_dev_enabled(dev))
Jens Axboe9b847542006-01-06 09:28:07 +01005085 return 0;
5086 if (dev->class == ATA_DEV_ATA)
Tejun Heo3373efd2006-05-15 20:57:53 +09005087 ata_flush_cache(dev);
Jens Axboe9b847542006-01-06 09:28:07 +01005088
Nigel Cunningham082776e2006-03-23 23:22:16 +10005089 if (state.event != PM_EVENT_FREEZE)
Tejun Heo3373efd2006-05-15 20:57:53 +09005090 ata_standby_drive(dev);
Jens Axboe9b847542006-01-06 09:28:07 +01005091 ap->flags |= ATA_FLAG_SUSPENDED;
5092 return 0;
5093}
5094
Randy Dunlapc893a3a2006-01-28 13:15:32 -05005095/**
5096 * ata_port_start - Set port up for dma.
5097 * @ap: Port to initialize
5098 *
5099 * Called just after data structures for each port are
5100 * initialized. Allocates space for PRD table.
5101 *
5102 * May be used as the port_start() entry in ata_port_operations.
5103 *
5104 * LOCKING:
5105 * Inherited from caller.
5106 */
5107
Linus Torvalds1da177e2005-04-16 15:20:36 -07005108int ata_port_start (struct ata_port *ap)
5109{
Brian King2f1f6102006-03-23 17:30:15 -06005110 struct device *dev = ap->dev;
Jeff Garzik6037d6b2005-11-04 22:08:00 -05005111 int rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005112
5113 ap->prd = dma_alloc_coherent(dev, ATA_PRD_TBL_SZ, &ap->prd_dma, GFP_KERNEL);
5114 if (!ap->prd)
5115 return -ENOMEM;
5116
Jeff Garzik6037d6b2005-11-04 22:08:00 -05005117 rc = ata_pad_alloc(ap, dev);
5118 if (rc) {
Jeff Garzikcedc9a42005-10-05 07:13:30 -04005119 dma_free_coherent(dev, ATA_PRD_TBL_SZ, ap->prd, ap->prd_dma);
Jeff Garzik6037d6b2005-11-04 22:08:00 -05005120 return rc;
Jeff Garzikcedc9a42005-10-05 07:13:30 -04005121 }
5122
Linus Torvalds1da177e2005-04-16 15:20:36 -07005123 DPRINTK("prd alloc, virt %p, dma %llx\n", ap->prd, (unsigned long long) ap->prd_dma);
5124
5125 return 0;
5126}
5127
Edward Falk0baab862005-06-02 18:17:13 -04005128
5129/**
5130 * ata_port_stop - Undo ata_port_start()
5131 * @ap: Port to shut down
5132 *
5133 * Frees the PRD table.
5134 *
5135 * May be used as the port_stop() entry in ata_port_operations.
5136 *
5137 * LOCKING:
Randy Dunlap6f0ef4f2005-10-25 01:44:30 -04005138 * Inherited from caller.
Edward Falk0baab862005-06-02 18:17:13 -04005139 */
5140
Linus Torvalds1da177e2005-04-16 15:20:36 -07005141void ata_port_stop (struct ata_port *ap)
5142{
Brian King2f1f6102006-03-23 17:30:15 -06005143 struct device *dev = ap->dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005144
5145 dma_free_coherent(dev, ATA_PRD_TBL_SZ, ap->prd, ap->prd_dma);
Jeff Garzik6037d6b2005-11-04 22:08:00 -05005146 ata_pad_free(ap, dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005147}
5148
Jeff Garzikaa8f0dc2005-05-26 21:54:27 -04005149void ata_host_stop (struct ata_host_set *host_set)
5150{
5151 if (host_set->mmio_base)
5152 iounmap(host_set->mmio_base);
5153}
5154
5155
Linus Torvalds1da177e2005-04-16 15:20:36 -07005156/**
5157 * ata_host_remove - Unregister SCSI host structure with upper layers
5158 * @ap: Port to unregister
5159 * @do_unregister: 1 if we fully unregister, 0 to just stop the port
5160 *
5161 * LOCKING:
Randy Dunlap6f0ef4f2005-10-25 01:44:30 -04005162 * Inherited from caller.
Linus Torvalds1da177e2005-04-16 15:20:36 -07005163 */
5164
5165static void ata_host_remove(struct ata_port *ap, unsigned int do_unregister)
5166{
5167 struct Scsi_Host *sh = ap->host;
5168
5169 DPRINTK("ENTER\n");
5170
5171 if (do_unregister)
5172 scsi_remove_host(sh);
5173
5174 ap->ops->port_stop(ap);
5175}
5176
5177/**
Tejun Heo3ef3b432006-05-31 18:27:30 +09005178 * ata_dev_init - Initialize an ata_device structure
5179 * @dev: Device structure to initialize
5180 *
5181 * Initialize @dev in preparation for probing.
5182 *
5183 * LOCKING:
5184 * Inherited from caller.
5185 */
5186void ata_dev_init(struct ata_device *dev)
5187{
5188 struct ata_port *ap = dev->ap;
Tejun Heo72fa4b72006-05-31 18:27:32 +09005189 unsigned long flags;
Tejun Heo3ef3b432006-05-31 18:27:30 +09005190
Tejun Heo5a04bf42006-05-31 18:27:38 +09005191 /* SATA spd limit is bound to the first device */
5192 ap->sata_spd_limit = ap->hw_sata_spd_limit;
5193
Tejun Heo72fa4b72006-05-31 18:27:32 +09005194 /* High bits of dev->flags are used to record warm plug
5195 * requests which occur asynchronously. Synchronize using
5196 * host_set lock.
5197 */
Jeff Garzikba6a1302006-06-22 23:46:10 -04005198 spin_lock_irqsave(ap->lock, flags);
Tejun Heo72fa4b72006-05-31 18:27:32 +09005199 dev->flags &= ~ATA_DFLAG_INIT_MASK;
Jeff Garzikba6a1302006-06-22 23:46:10 -04005200 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heo72fa4b72006-05-31 18:27:32 +09005201
5202 memset((void *)dev + ATA_DEVICE_CLEAR_OFFSET, 0,
5203 sizeof(*dev) - ATA_DEVICE_CLEAR_OFFSET);
Tejun Heo3ef3b432006-05-31 18:27:30 +09005204 dev->pio_mask = UINT_MAX;
5205 dev->mwdma_mask = UINT_MAX;
5206 dev->udma_mask = UINT_MAX;
5207}
5208
5209/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07005210 * ata_host_init - Initialize an ata_port structure
5211 * @ap: Structure to initialize
5212 * @host: associated SCSI mid-layer structure
5213 * @host_set: Collection of hosts to which @ap belongs
5214 * @ent: Probe information provided by low-level driver
5215 * @port_no: Port number associated with this ata_port
5216 *
Jeff Garzik0cba6322005-05-30 19:49:12 -04005217 * Initialize a new ata_port structure, and its associated
5218 * scsi_host.
5219 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07005220 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04005221 * Inherited from caller.
Linus Torvalds1da177e2005-04-16 15:20:36 -07005222 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07005223static void ata_host_init(struct ata_port *ap, struct Scsi_Host *host,
5224 struct ata_host_set *host_set,
Jeff Garzik057ace52005-10-22 14:27:05 -04005225 const struct ata_probe_ent *ent, unsigned int port_no)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005226{
5227 unsigned int i;
5228
5229 host->max_id = 16;
5230 host->max_lun = 1;
5231 host->max_channel = 1;
5232 host->unique_id = ata_unique_id++;
5233 host->max_cmd_len = 12;
Christoph Hellwig12413192005-06-11 01:05:01 +02005234
Jeff Garzikba6a1302006-06-22 23:46:10 -04005235 ap->lock = &host_set->lock;
Tejun Heo198e0fe2006-04-02 18:51:52 +09005236 ap->flags = ATA_FLAG_DISABLED;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005237 ap->id = host->unique_id;
5238 ap->host = host;
5239 ap->ctl = ATA_DEVCTL_OBS;
5240 ap->host_set = host_set;
Brian King2f1f6102006-03-23 17:30:15 -06005241 ap->dev = ent->dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005242 ap->port_no = port_no;
5243 ap->hard_port_no =
5244 ent->legacy_mode ? ent->hard_port_no : port_no;
5245 ap->pio_mask = ent->pio_mask;
5246 ap->mwdma_mask = ent->mwdma_mask;
5247 ap->udma_mask = ent->udma_mask;
5248 ap->flags |= ent->host_flags;
5249 ap->ops = ent->port_ops;
Tejun Heo5a04bf42006-05-31 18:27:38 +09005250 ap->hw_sata_spd_limit = UINT_MAX;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005251 ap->active_tag = ATA_TAG_POISON;
5252 ap->last_ctl = 0xFF;
Borislav Petkovbd5d8252006-06-11 23:17:01 -04005253
5254#if defined(ATA_VERBOSE_DEBUG)
5255 /* turn on all debugging levels */
5256 ap->msg_enable = 0x00FF;
5257#elif defined(ATA_DEBUG)
5258 ap->msg_enable = ATA_MSG_DRV | ATA_MSG_INFO | ATA_MSG_CTL | ATA_MSG_WARN | ATA_MSG_ERR;
Tejun Heo88574552006-06-25 20:00:35 +09005259#else
Borislav Petkov0dd4b212006-06-23 02:29:08 -04005260 ap->msg_enable = ATA_MSG_DRV | ATA_MSG_ERR | ATA_MSG_WARN;
Borislav Petkovbd5d8252006-06-11 23:17:01 -04005261#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07005262
Tejun Heo86e45b62006-03-05 15:29:09 +09005263 INIT_WORK(&ap->port_task, NULL, NULL);
Tejun Heo580b21022006-05-31 18:28:05 +09005264 INIT_WORK(&ap->hotplug_task, ata_scsi_hotplug, ap);
zhao, forrest3057ac32006-06-12 12:01:34 +08005265 INIT_WORK(&ap->scsi_rescan_task, ata_scsi_dev_rescan, ap);
Tejun Heoa72ec4c2006-01-23 13:09:37 +09005266 INIT_LIST_HEAD(&ap->eh_done_q);
Tejun Heoc6cf9e92006-05-31 18:27:27 +09005267 init_waitqueue_head(&ap->eh_wait_q);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005268
Tejun Heo838df622006-05-15 20:57:44 +09005269 /* set cable type */
5270 ap->cbl = ATA_CBL_NONE;
5271 if (ap->flags & ATA_FLAG_SATA)
5272 ap->cbl = ATA_CBL_SATA;
5273
Tejun Heoacf356b2006-03-24 14:07:50 +09005274 for (i = 0; i < ATA_MAX_DEVICES; i++) {
5275 struct ata_device *dev = &ap->device[i];
Tejun Heo38d87232006-05-15 20:57:51 +09005276 dev->ap = ap;
Tejun Heo72fa4b72006-05-31 18:27:32 +09005277 dev->devno = i;
Tejun Heo3ef3b432006-05-31 18:27:30 +09005278 ata_dev_init(dev);
Tejun Heoacf356b2006-03-24 14:07:50 +09005279 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07005280
5281#ifdef ATA_IRQ_TRAP
5282 ap->stats.unhandled_irq = 1;
5283 ap->stats.idle_irq = 1;
5284#endif
5285
5286 memcpy(&ap->ioaddr, &ent->port[port_no], sizeof(struct ata_ioports));
5287}
5288
5289/**
5290 * ata_host_add - Attach low-level ATA driver to system
5291 * @ent: Information provided by low-level driver
5292 * @host_set: Collections of ports to which we add
5293 * @port_no: Port number associated with this host
5294 *
Jeff Garzik0cba6322005-05-30 19:49:12 -04005295 * Attach low-level ATA driver to system.
5296 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07005297 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04005298 * PCI/etc. bus probe sem.
Linus Torvalds1da177e2005-04-16 15:20:36 -07005299 *
5300 * RETURNS:
Jeff Garzik0cba6322005-05-30 19:49:12 -04005301 * New ata_port on success, for NULL on error.
Linus Torvalds1da177e2005-04-16 15:20:36 -07005302 */
5303
Jeff Garzik057ace52005-10-22 14:27:05 -04005304static struct ata_port * ata_host_add(const struct ata_probe_ent *ent,
Linus Torvalds1da177e2005-04-16 15:20:36 -07005305 struct ata_host_set *host_set,
5306 unsigned int port_no)
5307{
5308 struct Scsi_Host *host;
5309 struct ata_port *ap;
5310 int rc;
5311
5312 DPRINTK("ENTER\n");
Tejun Heoaec5c3c2006-03-25 01:33:34 +09005313
Tejun Heo52783c52006-05-31 18:28:22 +09005314 if (!ent->port_ops->error_handler &&
Tejun Heoaec5c3c2006-03-25 01:33:34 +09005315 !(ent->host_flags & (ATA_FLAG_SATA_RESET | ATA_FLAG_SRST))) {
5316 printk(KERN_ERR "ata%u: no reset mechanism available\n",
5317 port_no);
5318 return NULL;
5319 }
5320
Linus Torvalds1da177e2005-04-16 15:20:36 -07005321 host = scsi_host_alloc(ent->sht, sizeof(struct ata_port));
5322 if (!host)
5323 return NULL;
5324
Tejun Heo30afc842006-03-18 18:40:14 +09005325 host->transportt = &ata_scsi_transport_template;
5326
Jeff Garzik35bb94b2006-04-11 13:12:34 -04005327 ap = ata_shost_to_port(host);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005328
5329 ata_host_init(ap, host, host_set, ent, port_no);
5330
5331 rc = ap->ops->port_start(ap);
5332 if (rc)
5333 goto err_out;
5334
5335 return ap;
5336
5337err_out:
5338 scsi_host_put(host);
5339 return NULL;
5340}
5341
5342/**
Jeff Garzik0cba6322005-05-30 19:49:12 -04005343 * ata_device_add - Register hardware device with ATA and SCSI layers
5344 * @ent: Probe information describing hardware device to be registered
5345 *
5346 * This function processes the information provided in the probe
5347 * information struct @ent, allocates the necessary ATA and SCSI
5348 * host information structures, initializes them, and registers
5349 * everything with requisite kernel subsystems.
5350 *
5351 * This function requests irqs, probes the ATA bus, and probes
5352 * the SCSI bus.
Linus Torvalds1da177e2005-04-16 15:20:36 -07005353 *
5354 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04005355 * PCI/etc. bus probe sem.
Linus Torvalds1da177e2005-04-16 15:20:36 -07005356 *
5357 * RETURNS:
Jeff Garzik0cba6322005-05-30 19:49:12 -04005358 * Number of ports registered. Zero on error (no ports registered).
Linus Torvalds1da177e2005-04-16 15:20:36 -07005359 */
Jeff Garzik057ace52005-10-22 14:27:05 -04005360int ata_device_add(const struct ata_probe_ent *ent)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005361{
5362 unsigned int count = 0, i;
5363 struct device *dev = ent->dev;
5364 struct ata_host_set *host_set;
Jeff Garzik39b07ce2006-06-11 23:59:44 -04005365 int rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005366
5367 DPRINTK("ENTER\n");
5368 /* alloc a container for our list of ATA ports (buses) */
Randy Dunlap57f3bda2005-10-28 20:37:23 -07005369 host_set = kzalloc(sizeof(struct ata_host_set) +
Linus Torvalds1da177e2005-04-16 15:20:36 -07005370 (ent->n_ports * sizeof(void *)), GFP_KERNEL);
5371 if (!host_set)
5372 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005373 spin_lock_init(&host_set->lock);
5374
5375 host_set->dev = dev;
5376 host_set->n_ports = ent->n_ports;
5377 host_set->irq = ent->irq;
5378 host_set->mmio_base = ent->mmio_base;
5379 host_set->private_data = ent->private_data;
5380 host_set->ops = ent->port_ops;
Alan Cox5444a6f2006-03-27 18:58:20 +01005381 host_set->flags = ent->host_set_flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005382
5383 /* register each port bound to this device */
5384 for (i = 0; i < ent->n_ports; i++) {
5385 struct ata_port *ap;
5386 unsigned long xfer_mode_mask;
5387
5388 ap = ata_host_add(ent, host_set, i);
5389 if (!ap)
5390 goto err_out;
5391
5392 host_set->ports[i] = ap;
5393 xfer_mode_mask =(ap->udma_mask << ATA_SHIFT_UDMA) |
5394 (ap->mwdma_mask << ATA_SHIFT_MWDMA) |
5395 (ap->pio_mask << ATA_SHIFT_PIO);
5396
5397 /* print per-port info to dmesg */
Tejun Heof15a1da2006-05-15 20:57:56 +09005398 ata_port_printk(ap, KERN_INFO, "%cATA max %s cmd 0x%lX "
5399 "ctl 0x%lX bmdma 0x%lX irq %lu\n",
5400 ap->flags & ATA_FLAG_SATA ? 'S' : 'P',
5401 ata_mode_string(xfer_mode_mask),
5402 ap->ioaddr.cmd_addr,
5403 ap->ioaddr.ctl_addr,
5404 ap->ioaddr.bmdma_addr,
5405 ent->irq);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005406
5407 ata_chk_status(ap);
5408 host_set->ops->irq_clear(ap);
Tejun Heoe3180492006-05-15 20:58:09 +09005409 ata_eh_freeze_port(ap); /* freeze port before requesting IRQ */
Linus Torvalds1da177e2005-04-16 15:20:36 -07005410 count++;
5411 }
5412
Randy Dunlap57f3bda2005-10-28 20:37:23 -07005413 if (!count)
5414 goto err_free_ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005415
5416 /* obtain irq, that is shared between channels */
Jeff Garzik39b07ce2006-06-11 23:59:44 -04005417 rc = request_irq(ent->irq, ent->port_ops->irq_handler, ent->irq_flags,
5418 DRV_NAME, host_set);
5419 if (rc) {
5420 dev_printk(KERN_ERR, dev, "irq %lu request failed: %d\n",
5421 ent->irq, rc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005422 goto err_out;
Jeff Garzik39b07ce2006-06-11 23:59:44 -04005423 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07005424
5425 /* perform each probe synchronously */
5426 DPRINTK("probe begin\n");
5427 for (i = 0; i < count; i++) {
5428 struct ata_port *ap;
Tejun Heo5a04bf42006-05-31 18:27:38 +09005429 u32 scontrol;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005430 int rc;
5431
5432 ap = host_set->ports[i];
5433
Tejun Heo5a04bf42006-05-31 18:27:38 +09005434 /* init sata_spd_limit to the current value */
5435 if (sata_scr_read(ap, SCR_CONTROL, &scontrol) == 0) {
5436 int spd = (scontrol >> 4) & 0xf;
5437 ap->hw_sata_spd_limit &= (1 << spd) - 1;
5438 }
5439 ap->sata_spd_limit = ap->hw_sata_spd_limit;
5440
Linus Torvalds1da177e2005-04-16 15:20:36 -07005441 rc = scsi_add_host(ap->host, dev);
5442 if (rc) {
Tejun Heof15a1da2006-05-15 20:57:56 +09005443 ata_port_printk(ap, KERN_ERR, "scsi_add_host failed\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07005444 /* FIXME: do something useful here */
5445 /* FIXME: handle unconditional calls to
5446 * scsi_scan_host and ata_host_remove, below,
5447 * at the very least
5448 */
5449 }
Tejun Heo3e706392006-05-31 18:28:11 +09005450
Tejun Heo52783c52006-05-31 18:28:22 +09005451 if (ap->ops->error_handler) {
Tejun Heo3e706392006-05-31 18:28:11 +09005452 unsigned long flags;
5453
5454 ata_port_probe(ap);
5455
5456 /* kick EH for boot probing */
Jeff Garzikba6a1302006-06-22 23:46:10 -04005457 spin_lock_irqsave(ap->lock, flags);
Tejun Heo3e706392006-05-31 18:28:11 +09005458
5459 ap->eh_info.probe_mask = (1 << ATA_MAX_DEVICES) - 1;
5460 ap->eh_info.action |= ATA_EH_SOFTRESET;
5461
5462 ap->flags |= ATA_FLAG_LOADING;
5463 ata_port_schedule_eh(ap);
5464
Jeff Garzikba6a1302006-06-22 23:46:10 -04005465 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heo3e706392006-05-31 18:28:11 +09005466
5467 /* wait for EH to finish */
5468 ata_port_wait_eh(ap);
5469 } else {
5470 DPRINTK("ata%u: bus probe begin\n", ap->id);
5471 rc = ata_bus_probe(ap);
5472 DPRINTK("ata%u: bus probe end\n", ap->id);
5473
5474 if (rc) {
5475 /* FIXME: do something useful here?
5476 * Current libata behavior will
5477 * tear down everything when
5478 * the module is removed
5479 * or the h/w is unplugged.
5480 */
5481 }
5482 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07005483 }
5484
5485 /* probes are done, now scan each port's disk(s) */
Randy Dunlapc893a3a2006-01-28 13:15:32 -05005486 DPRINTK("host probe begin\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07005487 for (i = 0; i < count; i++) {
5488 struct ata_port *ap = host_set->ports[i];
5489
Jeff Garzik644dd0c2005-10-03 15:55:19 -04005490 ata_scsi_scan_host(ap);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005491 }
5492
5493 dev_set_drvdata(dev, host_set);
5494
5495 VPRINTK("EXIT, returning %u\n", ent->n_ports);
5496 return ent->n_ports; /* success */
5497
5498err_out:
5499 for (i = 0; i < count; i++) {
5500 ata_host_remove(host_set->ports[i], 1);
5501 scsi_host_put(host_set->ports[i]->host);
5502 }
Randy Dunlap57f3bda2005-10-28 20:37:23 -07005503err_free_ret:
Linus Torvalds1da177e2005-04-16 15:20:36 -07005504 kfree(host_set);
5505 VPRINTK("EXIT, returning 0\n");
5506 return 0;
5507}
5508
5509/**
Tejun Heo720ba122006-05-31 18:28:13 +09005510 * ata_port_detach - Detach ATA port in prepration of device removal
5511 * @ap: ATA port to be detached
5512 *
5513 * Detach all ATA devices and the associated SCSI devices of @ap;
5514 * then, remove the associated SCSI host. @ap is guaranteed to
5515 * be quiescent on return from this function.
5516 *
5517 * LOCKING:
5518 * Kernel thread context (may sleep).
5519 */
5520void ata_port_detach(struct ata_port *ap)
5521{
5522 unsigned long flags;
5523 int i;
5524
5525 if (!ap->ops->error_handler)
5526 return;
5527
5528 /* tell EH we're leaving & flush EH */
Jeff Garzikba6a1302006-06-22 23:46:10 -04005529 spin_lock_irqsave(ap->lock, flags);
Tejun Heo720ba122006-05-31 18:28:13 +09005530 ap->flags |= ATA_FLAG_UNLOADING;
Jeff Garzikba6a1302006-06-22 23:46:10 -04005531 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heo720ba122006-05-31 18:28:13 +09005532
5533 ata_port_wait_eh(ap);
5534
5535 /* EH is now guaranteed to see UNLOADING, so no new device
5536 * will be attached. Disable all existing devices.
5537 */
Jeff Garzikba6a1302006-06-22 23:46:10 -04005538 spin_lock_irqsave(ap->lock, flags);
Tejun Heo720ba122006-05-31 18:28:13 +09005539
5540 for (i = 0; i < ATA_MAX_DEVICES; i++)
5541 ata_dev_disable(&ap->device[i]);
5542
Jeff Garzikba6a1302006-06-22 23:46:10 -04005543 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heo720ba122006-05-31 18:28:13 +09005544
5545 /* Final freeze & EH. All in-flight commands are aborted. EH
5546 * will be skipped and retrials will be terminated with bad
5547 * target.
5548 */
Jeff Garzikba6a1302006-06-22 23:46:10 -04005549 spin_lock_irqsave(ap->lock, flags);
Tejun Heo720ba122006-05-31 18:28:13 +09005550 ata_port_freeze(ap); /* won't be thawed */
Jeff Garzikba6a1302006-06-22 23:46:10 -04005551 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heo720ba122006-05-31 18:28:13 +09005552
5553 ata_port_wait_eh(ap);
5554
5555 /* Flush hotplug task. The sequence is similar to
5556 * ata_port_flush_task().
5557 */
5558 flush_workqueue(ata_aux_wq);
5559 cancel_delayed_work(&ap->hotplug_task);
5560 flush_workqueue(ata_aux_wq);
5561
5562 /* remove the associated SCSI host */
5563 scsi_remove_host(ap->host);
5564}
5565
5566/**
Alan Cox17b14452005-09-15 15:44:00 +01005567 * ata_host_set_remove - PCI layer callback for device removal
5568 * @host_set: ATA host set that was removed
5569 *
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05005570 * Unregister all objects associated with this host set. Free those
Alan Cox17b14452005-09-15 15:44:00 +01005571 * objects.
5572 *
5573 * LOCKING:
5574 * Inherited from calling layer (may sleep).
5575 */
5576
Alan Cox17b14452005-09-15 15:44:00 +01005577void ata_host_set_remove(struct ata_host_set *host_set)
5578{
Alan Cox17b14452005-09-15 15:44:00 +01005579 unsigned int i;
5580
Tejun Heo720ba122006-05-31 18:28:13 +09005581 for (i = 0; i < host_set->n_ports; i++)
5582 ata_port_detach(host_set->ports[i]);
Alan Cox17b14452005-09-15 15:44:00 +01005583
5584 free_irq(host_set->irq, host_set);
5585
5586 for (i = 0; i < host_set->n_ports; i++) {
Tejun Heo720ba122006-05-31 18:28:13 +09005587 struct ata_port *ap = host_set->ports[i];
Alan Cox17b14452005-09-15 15:44:00 +01005588
5589 ata_scsi_release(ap->host);
5590
5591 if ((ap->flags & ATA_FLAG_NO_LEGACY) == 0) {
5592 struct ata_ioports *ioaddr = &ap->ioaddr;
5593
5594 if (ioaddr->cmd_addr == 0x1f0)
5595 release_region(0x1f0, 8);
5596 else if (ioaddr->cmd_addr == 0x170)
5597 release_region(0x170, 8);
5598 }
5599
5600 scsi_host_put(ap->host);
5601 }
5602
5603 if (host_set->ops->host_stop)
5604 host_set->ops->host_stop(host_set);
5605
5606 kfree(host_set);
5607}
5608
5609/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07005610 * ata_scsi_release - SCSI layer callback hook for host unload
5611 * @host: libata host to be unloaded
5612 *
5613 * Performs all duties necessary to shut down a libata port...
5614 * Kill port kthread, disable port, and release resources.
5615 *
5616 * LOCKING:
5617 * Inherited from SCSI layer.
5618 *
5619 * RETURNS:
5620 * One.
5621 */
5622
5623int ata_scsi_release(struct Scsi_Host *host)
5624{
Jeff Garzik35bb94b2006-04-11 13:12:34 -04005625 struct ata_port *ap = ata_shost_to_port(host);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005626
5627 DPRINTK("ENTER\n");
5628
5629 ap->ops->port_disable(ap);
5630 ata_host_remove(ap, 0);
5631
5632 DPRINTK("EXIT\n");
5633 return 1;
5634}
5635
5636/**
5637 * ata_std_ports - initialize ioaddr with standard port offsets.
5638 * @ioaddr: IO address structure to be initialized
Edward Falk0baab862005-06-02 18:17:13 -04005639 *
5640 * Utility function which initializes data_addr, error_addr,
5641 * feature_addr, nsect_addr, lbal_addr, lbam_addr, lbah_addr,
5642 * device_addr, status_addr, and command_addr to standard offsets
5643 * relative to cmd_addr.
5644 *
5645 * Does not set ctl_addr, altstatus_addr, bmdma_addr, or scr_addr.
Linus Torvalds1da177e2005-04-16 15:20:36 -07005646 */
Edward Falk0baab862005-06-02 18:17:13 -04005647
Linus Torvalds1da177e2005-04-16 15:20:36 -07005648void ata_std_ports(struct ata_ioports *ioaddr)
5649{
5650 ioaddr->data_addr = ioaddr->cmd_addr + ATA_REG_DATA;
5651 ioaddr->error_addr = ioaddr->cmd_addr + ATA_REG_ERR;
5652 ioaddr->feature_addr = ioaddr->cmd_addr + ATA_REG_FEATURE;
5653 ioaddr->nsect_addr = ioaddr->cmd_addr + ATA_REG_NSECT;
5654 ioaddr->lbal_addr = ioaddr->cmd_addr + ATA_REG_LBAL;
5655 ioaddr->lbam_addr = ioaddr->cmd_addr + ATA_REG_LBAM;
5656 ioaddr->lbah_addr = ioaddr->cmd_addr + ATA_REG_LBAH;
5657 ioaddr->device_addr = ioaddr->cmd_addr + ATA_REG_DEVICE;
5658 ioaddr->status_addr = ioaddr->cmd_addr + ATA_REG_STATUS;
5659 ioaddr->command_addr = ioaddr->cmd_addr + ATA_REG_CMD;
5660}
5661
Edward Falk0baab862005-06-02 18:17:13 -04005662
Jeff Garzik374b1872005-08-30 05:42:52 -04005663#ifdef CONFIG_PCI
5664
5665void ata_pci_host_stop (struct ata_host_set *host_set)
5666{
5667 struct pci_dev *pdev = to_pci_dev(host_set->dev);
5668
5669 pci_iounmap(pdev, host_set->mmio_base);
5670}
5671
Edward Falk0baab862005-06-02 18:17:13 -04005672/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07005673 * ata_pci_remove_one - PCI layer callback for device removal
5674 * @pdev: PCI device that was removed
5675 *
5676 * PCI layer indicates to libata via this hook that
Randy Dunlap6f0ef4f2005-10-25 01:44:30 -04005677 * hot-unplug or module unload event has occurred.
Linus Torvalds1da177e2005-04-16 15:20:36 -07005678 * Handle this by unregistering all objects associated
5679 * with this PCI device. Free those objects. Then finally
5680 * release PCI resources and disable device.
5681 *
5682 * LOCKING:
5683 * Inherited from PCI layer (may sleep).
5684 */
5685
5686void ata_pci_remove_one (struct pci_dev *pdev)
5687{
5688 struct device *dev = pci_dev_to_dev(pdev);
5689 struct ata_host_set *host_set = dev_get_drvdata(dev);
Tejun Heof0eb62b2006-06-12 23:05:38 +09005690 struct ata_host_set *host_set2 = host_set->next;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005691
Alan Cox17b14452005-09-15 15:44:00 +01005692 ata_host_set_remove(host_set);
Tejun Heof0eb62b2006-06-12 23:05:38 +09005693 if (host_set2)
5694 ata_host_set_remove(host_set2);
5695
Linus Torvalds1da177e2005-04-16 15:20:36 -07005696 pci_release_regions(pdev);
5697 pci_disable_device(pdev);
5698 dev_set_drvdata(dev, NULL);
5699}
5700
5701/* move to PCI subsystem */
Jeff Garzik057ace52005-10-22 14:27:05 -04005702int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005703{
5704 unsigned long tmp = 0;
5705
5706 switch (bits->width) {
5707 case 1: {
5708 u8 tmp8 = 0;
5709 pci_read_config_byte(pdev, bits->reg, &tmp8);
5710 tmp = tmp8;
5711 break;
5712 }
5713 case 2: {
5714 u16 tmp16 = 0;
5715 pci_read_config_word(pdev, bits->reg, &tmp16);
5716 tmp = tmp16;
5717 break;
5718 }
5719 case 4: {
5720 u32 tmp32 = 0;
5721 pci_read_config_dword(pdev, bits->reg, &tmp32);
5722 tmp = tmp32;
5723 break;
5724 }
5725
5726 default:
5727 return -EINVAL;
5728 }
5729
5730 tmp &= bits->mask;
5731
5732 return (tmp == bits->val) ? 1 : 0;
5733}
Jens Axboe9b847542006-01-06 09:28:07 +01005734
5735int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t state)
5736{
5737 pci_save_state(pdev);
5738 pci_disable_device(pdev);
5739 pci_set_power_state(pdev, PCI_D3hot);
5740 return 0;
5741}
5742
5743int ata_pci_device_resume(struct pci_dev *pdev)
5744{
5745 pci_set_power_state(pdev, PCI_D0);
5746 pci_restore_state(pdev);
5747 pci_enable_device(pdev);
5748 pci_set_master(pdev);
5749 return 0;
5750}
Linus Torvalds1da177e2005-04-16 15:20:36 -07005751#endif /* CONFIG_PCI */
5752
5753
Linus Torvalds1da177e2005-04-16 15:20:36 -07005754static int __init ata_init(void)
5755{
Andrew Mortona8601e52006-06-25 01:36:52 -07005756 ata_probe_timeout *= HZ;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005757 ata_wq = create_workqueue("ata");
5758 if (!ata_wq)
5759 return -ENOMEM;
5760
Tejun Heo453b07a2006-05-31 18:27:42 +09005761 ata_aux_wq = create_singlethread_workqueue("ata_aux");
5762 if (!ata_aux_wq) {
5763 destroy_workqueue(ata_wq);
5764 return -ENOMEM;
5765 }
5766
Linus Torvalds1da177e2005-04-16 15:20:36 -07005767 printk(KERN_DEBUG "libata version " DRV_VERSION " loaded.\n");
5768 return 0;
5769}
5770
5771static void __exit ata_exit(void)
5772{
5773 destroy_workqueue(ata_wq);
Tejun Heo453b07a2006-05-31 18:27:42 +09005774 destroy_workqueue(ata_aux_wq);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005775}
5776
5777module_init(ata_init);
5778module_exit(ata_exit);
5779
Jeff Garzik67846b32005-10-05 02:58:32 -04005780static unsigned long ratelimit_time;
Ingo Molnar34af9462006-06-27 02:53:55 -07005781static DEFINE_SPINLOCK(ata_ratelimit_lock);
Jeff Garzik67846b32005-10-05 02:58:32 -04005782
5783int ata_ratelimit(void)
5784{
5785 int rc;
5786 unsigned long flags;
5787
5788 spin_lock_irqsave(&ata_ratelimit_lock, flags);
5789
5790 if (time_after(jiffies, ratelimit_time)) {
5791 rc = 1;
5792 ratelimit_time = jiffies + (HZ/5);
5793 } else
5794 rc = 0;
5795
5796 spin_unlock_irqrestore(&ata_ratelimit_lock, flags);
5797
5798 return rc;
5799}
5800
Tejun Heoc22daff2006-04-11 22:22:29 +09005801/**
5802 * ata_wait_register - wait until register value changes
5803 * @reg: IO-mapped register
5804 * @mask: Mask to apply to read register value
5805 * @val: Wait condition
5806 * @interval_msec: polling interval in milliseconds
5807 * @timeout_msec: timeout in milliseconds
5808 *
5809 * Waiting for some bits of register to change is a common
5810 * operation for ATA controllers. This function reads 32bit LE
5811 * IO-mapped register @reg and tests for the following condition.
5812 *
5813 * (*@reg & mask) != val
5814 *
5815 * If the condition is met, it returns; otherwise, the process is
5816 * repeated after @interval_msec until timeout.
5817 *
5818 * LOCKING:
5819 * Kernel thread context (may sleep)
5820 *
5821 * RETURNS:
5822 * The final register value.
5823 */
5824u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val,
5825 unsigned long interval_msec,
5826 unsigned long timeout_msec)
5827{
5828 unsigned long timeout;
5829 u32 tmp;
5830
5831 tmp = ioread32(reg);
5832
5833 /* Calculate timeout _after_ the first read to make sure
5834 * preceding writes reach the controller before starting to
5835 * eat away the timeout.
5836 */
5837 timeout = jiffies + (timeout_msec * HZ) / 1000;
5838
5839 while ((tmp & mask) == val && time_before(jiffies, timeout)) {
5840 msleep(interval_msec);
5841 tmp = ioread32(reg);
5842 }
5843
5844 return tmp;
5845}
5846
Linus Torvalds1da177e2005-04-16 15:20:36 -07005847/*
5848 * libata is essentially a library of internal helper functions for
5849 * low-level ATA host controller drivers. As such, the API/ABI is
5850 * likely to change as new drivers are added and updated.
5851 * Do not depend on ABI/API stability.
5852 */
5853
Tejun Heod7bb4cc2006-05-31 18:27:46 +09005854EXPORT_SYMBOL_GPL(sata_deb_timing_boot);
5855EXPORT_SYMBOL_GPL(sata_deb_timing_eh);
5856EXPORT_SYMBOL_GPL(sata_deb_timing_before_fsrst);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005857EXPORT_SYMBOL_GPL(ata_std_bios_param);
5858EXPORT_SYMBOL_GPL(ata_std_ports);
5859EXPORT_SYMBOL_GPL(ata_device_add);
Tejun Heo720ba122006-05-31 18:28:13 +09005860EXPORT_SYMBOL_GPL(ata_port_detach);
Alan Cox17b14452005-09-15 15:44:00 +01005861EXPORT_SYMBOL_GPL(ata_host_set_remove);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005862EXPORT_SYMBOL_GPL(ata_sg_init);
5863EXPORT_SYMBOL_GPL(ata_sg_init_one);
Tejun Heo9a1004d2006-05-31 18:27:52 +09005864EXPORT_SYMBOL_GPL(ata_hsm_move);
Tejun Heof686bcb2006-05-15 20:58:05 +09005865EXPORT_SYMBOL_GPL(ata_qc_complete);
Tejun Heodedaf2b2006-05-15 21:03:43 +09005866EXPORT_SYMBOL_GPL(ata_qc_complete_multiple);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005867EXPORT_SYMBOL_GPL(ata_qc_issue_prot);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005868EXPORT_SYMBOL_GPL(ata_tf_load);
5869EXPORT_SYMBOL_GPL(ata_tf_read);
5870EXPORT_SYMBOL_GPL(ata_noop_dev_select);
5871EXPORT_SYMBOL_GPL(ata_std_dev_select);
5872EXPORT_SYMBOL_GPL(ata_tf_to_fis);
5873EXPORT_SYMBOL_GPL(ata_tf_from_fis);
5874EXPORT_SYMBOL_GPL(ata_check_status);
5875EXPORT_SYMBOL_GPL(ata_altstatus);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005876EXPORT_SYMBOL_GPL(ata_exec_command);
5877EXPORT_SYMBOL_GPL(ata_port_start);
5878EXPORT_SYMBOL_GPL(ata_port_stop);
Jeff Garzikaa8f0dc2005-05-26 21:54:27 -04005879EXPORT_SYMBOL_GPL(ata_host_stop);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005880EXPORT_SYMBOL_GPL(ata_interrupt);
Alan Coxa6b2c5d2006-05-22 16:59:59 +01005881EXPORT_SYMBOL_GPL(ata_mmio_data_xfer);
5882EXPORT_SYMBOL_GPL(ata_pio_data_xfer);
Alan Cox75e99582006-05-24 14:14:41 +01005883EXPORT_SYMBOL_GPL(ata_pio_data_xfer_noirq);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005884EXPORT_SYMBOL_GPL(ata_qc_prep);
Brian Kinge46834c2006-03-17 17:04:03 -06005885EXPORT_SYMBOL_GPL(ata_noop_qc_prep);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005886EXPORT_SYMBOL_GPL(ata_bmdma_setup);
5887EXPORT_SYMBOL_GPL(ata_bmdma_start);
5888EXPORT_SYMBOL_GPL(ata_bmdma_irq_clear);
5889EXPORT_SYMBOL_GPL(ata_bmdma_status);
5890EXPORT_SYMBOL_GPL(ata_bmdma_stop);
Tejun Heo6d97dbd2006-05-15 20:58:24 +09005891EXPORT_SYMBOL_GPL(ata_bmdma_freeze);
5892EXPORT_SYMBOL_GPL(ata_bmdma_thaw);
5893EXPORT_SYMBOL_GPL(ata_bmdma_drive_eh);
5894EXPORT_SYMBOL_GPL(ata_bmdma_error_handler);
5895EXPORT_SYMBOL_GPL(ata_bmdma_post_internal_cmd);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005896EXPORT_SYMBOL_GPL(ata_port_probe);
Tejun Heo3c567b72006-05-15 20:57:23 +09005897EXPORT_SYMBOL_GPL(sata_set_spd);
Tejun Heod7bb4cc2006-05-31 18:27:46 +09005898EXPORT_SYMBOL_GPL(sata_phy_debounce);
5899EXPORT_SYMBOL_GPL(sata_phy_resume);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005900EXPORT_SYMBOL_GPL(sata_phy_reset);
5901EXPORT_SYMBOL_GPL(__sata_phy_reset);
5902EXPORT_SYMBOL_GPL(ata_bus_reset);
Tejun Heof5914a42006-05-31 18:27:48 +09005903EXPORT_SYMBOL_GPL(ata_std_prereset);
Tejun Heoc2bd5802006-01-24 17:05:22 +09005904EXPORT_SYMBOL_GPL(ata_std_softreset);
5905EXPORT_SYMBOL_GPL(sata_std_hardreset);
5906EXPORT_SYMBOL_GPL(ata_std_postreset);
Tejun Heo623a3122006-03-05 17:55:58 +09005907EXPORT_SYMBOL_GPL(ata_dev_revalidate);
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05005908EXPORT_SYMBOL_GPL(ata_dev_classify);
5909EXPORT_SYMBOL_GPL(ata_dev_pair);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005910EXPORT_SYMBOL_GPL(ata_port_disable);
Jeff Garzik67846b32005-10-05 02:58:32 -04005911EXPORT_SYMBOL_GPL(ata_ratelimit);
Tejun Heoc22daff2006-04-11 22:22:29 +09005912EXPORT_SYMBOL_GPL(ata_wait_register);
Tejun Heo6f8b9952006-01-24 17:05:21 +09005913EXPORT_SYMBOL_GPL(ata_busy_sleep);
Tejun Heo86e45b62006-03-05 15:29:09 +09005914EXPORT_SYMBOL_GPL(ata_port_queue_task);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005915EXPORT_SYMBOL_GPL(ata_scsi_ioctl);
5916EXPORT_SYMBOL_GPL(ata_scsi_queuecmd);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005917EXPORT_SYMBOL_GPL(ata_scsi_slave_config);
Tejun Heo83c47bc2006-05-31 18:28:07 +09005918EXPORT_SYMBOL_GPL(ata_scsi_slave_destroy);
Tejun Heoa6e6ce82006-05-15 21:03:48 +09005919EXPORT_SYMBOL_GPL(ata_scsi_change_queue_depth);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005920EXPORT_SYMBOL_GPL(ata_scsi_release);
5921EXPORT_SYMBOL_GPL(ata_host_intr);
Tejun Heo34bf2172006-05-15 20:57:46 +09005922EXPORT_SYMBOL_GPL(sata_scr_valid);
5923EXPORT_SYMBOL_GPL(sata_scr_read);
5924EXPORT_SYMBOL_GPL(sata_scr_write);
5925EXPORT_SYMBOL_GPL(sata_scr_write_flush);
5926EXPORT_SYMBOL_GPL(ata_port_online);
5927EXPORT_SYMBOL_GPL(ata_port_offline);
Tejun Heo6a62a042006-02-13 10:02:46 +09005928EXPORT_SYMBOL_GPL(ata_id_string);
5929EXPORT_SYMBOL_GPL(ata_id_c_string);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005930EXPORT_SYMBOL_GPL(ata_scsi_simulate);
5931
Alan Cox1bc4ccf2006-01-09 17:18:14 +00005932EXPORT_SYMBOL_GPL(ata_pio_need_iordy);
Alan Cox452503f2005-10-21 19:01:32 -04005933EXPORT_SYMBOL_GPL(ata_timing_compute);
5934EXPORT_SYMBOL_GPL(ata_timing_merge);
5935
Linus Torvalds1da177e2005-04-16 15:20:36 -07005936#ifdef CONFIG_PCI
5937EXPORT_SYMBOL_GPL(pci_test_config_bits);
Jeff Garzik374b1872005-08-30 05:42:52 -04005938EXPORT_SYMBOL_GPL(ata_pci_host_stop);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005939EXPORT_SYMBOL_GPL(ata_pci_init_native_mode);
5940EXPORT_SYMBOL_GPL(ata_pci_init_one);
5941EXPORT_SYMBOL_GPL(ata_pci_remove_one);
Jens Axboe9b847542006-01-06 09:28:07 +01005942EXPORT_SYMBOL_GPL(ata_pci_device_suspend);
5943EXPORT_SYMBOL_GPL(ata_pci_device_resume);
Alan Cox67951ad2006-03-22 15:55:54 +00005944EXPORT_SYMBOL_GPL(ata_pci_default_filter);
5945EXPORT_SYMBOL_GPL(ata_pci_clear_simplex);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005946#endif /* CONFIG_PCI */
Jens Axboe9b847542006-01-06 09:28:07 +01005947
5948EXPORT_SYMBOL_GPL(ata_device_suspend);
5949EXPORT_SYMBOL_GPL(ata_device_resume);
5950EXPORT_SYMBOL_GPL(ata_scsi_device_suspend);
5951EXPORT_SYMBOL_GPL(ata_scsi_device_resume);
Tejun Heoece1d632006-04-02 18:51:53 +09005952
Tejun Heoece1d632006-04-02 18:51:53 +09005953EXPORT_SYMBOL_GPL(ata_eng_timeout);
Tejun Heo7b70fc02006-05-15 20:58:07 +09005954EXPORT_SYMBOL_GPL(ata_port_schedule_eh);
5955EXPORT_SYMBOL_GPL(ata_port_abort);
Tejun Heoe3180492006-05-15 20:58:09 +09005956EXPORT_SYMBOL_GPL(ata_port_freeze);
5957EXPORT_SYMBOL_GPL(ata_eh_freeze_port);
5958EXPORT_SYMBOL_GPL(ata_eh_thaw_port);
Tejun Heoece1d632006-04-02 18:51:53 +09005959EXPORT_SYMBOL_GPL(ata_eh_qc_complete);
5960EXPORT_SYMBOL_GPL(ata_eh_qc_retry);
Tejun Heo022bdb02006-05-15 20:58:22 +09005961EXPORT_SYMBOL_GPL(ata_do_eh);