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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 } */
Tejun Heoe9c83912006-07-03 16:07:26 +090064const unsigned long sata_deb_timing_normal[] = { 5, 100, 2000 };
65const unsigned long sata_deb_timing_hotplug[] = { 25, 500, 2000 };
66const unsigned long sata_deb_timing_long[] = { 100, 2000, 5000 };
Tejun Heod7bb4cc2006-05-31 18:27:46 +090067
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 Heob51e9e52006-06-29 01:29:30 +0900910 if (ap->pflags & ATA_PFLAG_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 Heob51e9e52006-06-29 01:29:30 +0900941 ap->pflags |= ATA_PFLAG_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 Heob51e9e52006-06-29 01:29:30 +0900960 ap->pflags &= ~ATA_PFLAG_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 */
Tejun Heob51e9e52006-06-29 01:29:30 +09001012 if (ap->pflags & ATA_PFLAG_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 */
Tejun Heoa4f57492006-09-12 20:35:49 -07001259 rc = -EINVAL;
1260 reason = "device reports illegal type";
1261
1262 if (class == ATA_DEV_ATA) {
1263 if (!ata_id_is_ata(id) && !ata_id_is_cfa(id))
1264 goto err_out;
1265 } else {
1266 if (ata_id_is_ata(id))
1267 goto err_out;
Tejun Heo49016ac2006-02-21 02:12:11 +09001268 }
1269
1270 if (post_reset && class == ATA_DEV_ATA) {
1271 /*
1272 * The exact sequence expected by certain pre-ATA4 drives is:
1273 * SRST RESET
1274 * IDENTIFY
1275 * INITIALIZE DEVICE PARAMETERS
1276 * anything else..
1277 * Some drives were very specific about that exact sequence.
1278 */
1279 if (ata_id_major_version(id) < 4 || !ata_id_has_lba(id)) {
Tejun Heo3373efd2006-05-15 20:57:53 +09001280 err_mask = ata_dev_init_params(dev, id[3], id[6]);
Tejun Heo49016ac2006-02-21 02:12:11 +09001281 if (err_mask) {
1282 rc = -EIO;
1283 reason = "INIT_DEV_PARAMS failed";
1284 goto err_out;
1285 }
1286
1287 /* current CHS translation info (id[53-58]) might be
1288 * changed. reread the identify device info.
1289 */
1290 post_reset = 0;
1291 goto retry;
1292 }
1293 }
1294
1295 *p_class = class;
Tejun Heofe635c72006-05-15 20:57:35 +09001296
Tejun Heo49016ac2006-02-21 02:12:11 +09001297 return 0;
1298
1299 err_out:
Tejun Heo88574552006-06-25 20:00:35 +09001300 if (ata_msg_warn(ap))
Borislav Petkov0dd4b212006-06-23 02:29:08 -04001301 ata_dev_printk(dev, KERN_WARNING, "failed to IDENTIFY "
Tejun Heo88574552006-06-25 20:00:35 +09001302 "(%s, err_mask=0x%x)\n", reason, err_mask);
Tejun Heo49016ac2006-02-21 02:12:11 +09001303 return rc;
1304}
1305
Tejun Heo3373efd2006-05-15 20:57:53 +09001306static inline u8 ata_dev_knobble(struct ata_device *dev)
Tejun Heo4b2f3ed2006-03-01 16:09:36 +09001307{
Tejun Heo3373efd2006-05-15 20:57:53 +09001308 return ((dev->ap->cbl == ATA_CBL_SATA) && (!ata_id_is_sata(dev->id)));
Tejun Heo4b2f3ed2006-03-01 16:09:36 +09001309}
1310
Tejun Heoa6e6ce82006-05-15 21:03:48 +09001311static void ata_dev_config_ncq(struct ata_device *dev,
1312 char *desc, size_t desc_sz)
1313{
1314 struct ata_port *ap = dev->ap;
1315 int hdepth = 0, ddepth = ata_id_queue_depth(dev->id);
1316
1317 if (!ata_id_has_ncq(dev->id)) {
1318 desc[0] = '\0';
1319 return;
1320 }
1321
1322 if (ap->flags & ATA_FLAG_NCQ) {
1323 hdepth = min(ap->host->can_queue, ATA_MAX_QUEUE - 1);
1324 dev->flags |= ATA_DFLAG_NCQ;
1325 }
1326
1327 if (hdepth >= ddepth)
1328 snprintf(desc, desc_sz, "NCQ (depth %d)", ddepth);
1329 else
1330 snprintf(desc, desc_sz, "NCQ (depth %d/%d)", hdepth, ddepth);
1331}
1332
Brian Kinge6d902a2006-06-28 08:30:31 -05001333static void ata_set_port_max_cmd_len(struct ata_port *ap)
1334{
1335 int i;
1336
1337 if (ap->host) {
1338 ap->host->max_cmd_len = 0;
1339 for (i = 0; i < ATA_MAX_DEVICES; i++)
1340 ap->host->max_cmd_len = max_t(unsigned int,
1341 ap->host->max_cmd_len,
1342 ap->device[i].cdb_len);
1343 }
1344}
1345
Tejun Heo49016ac2006-02-21 02:12:11 +09001346/**
Tejun Heoffeae412006-03-01 16:09:35 +09001347 * ata_dev_configure - Configure the specified ATA/ATAPI device
Tejun Heoffeae412006-03-01 16:09:35 +09001348 * @dev: Target device to configure
Tejun Heo4c2d7212006-03-05 17:55:58 +09001349 * @print_info: Enable device info printout
Linus Torvalds1da177e2005-04-16 15:20:36 -07001350 *
Tejun Heoffeae412006-03-01 16:09:35 +09001351 * Configure @dev according to @dev->id. Generic and low-level
1352 * driver specific fixups are also applied.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001353 *
1354 * LOCKING:
Tejun Heoffeae412006-03-01 16:09:35 +09001355 * Kernel thread context (may sleep)
1356 *
1357 * RETURNS:
1358 * 0 on success, -errno otherwise
Linus Torvalds1da177e2005-04-16 15:20:36 -07001359 */
Tejun Heoa9beec92006-05-31 18:27:44 +09001360int ata_dev_configure(struct ata_device *dev, int print_info)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001361{
Tejun Heo3373efd2006-05-15 20:57:53 +09001362 struct ata_port *ap = dev->ap;
Tejun Heo1148c3a2006-03-13 19:48:04 +09001363 const u16 *id = dev->id;
Tejun Heoff8854b2006-03-06 04:31:56 +09001364 unsigned int xfer_mask;
Brian Kinge6d902a2006-06-28 08:30:31 -05001365 int rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001366
Borislav Petkov0dd4b212006-06-23 02:29:08 -04001367 if (!ata_dev_enabled(dev) && ata_msg_info(ap)) {
Tejun Heo88574552006-06-25 20:00:35 +09001368 ata_dev_printk(dev, KERN_INFO,
1369 "%s: ENTER/EXIT (host %u, dev %u) -- nodev\n",
1370 __FUNCTION__, ap->id, dev->devno);
Tejun Heoffeae412006-03-01 16:09:35 +09001371 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001372 }
1373
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, "%s: ENTER, host %u, dev %u\n",
1376 __FUNCTION__, ap->id, dev->devno);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001377
Tejun Heoc39f5eb2006-03-13 19:51:19 +09001378 /* print device capabilities */
Borislav Petkov0dd4b212006-06-23 02:29:08 -04001379 if (ata_msg_probe(ap))
Tejun Heo88574552006-06-25 20:00:35 +09001380 ata_dev_printk(dev, KERN_DEBUG,
1381 "%s: cfg 49:%04x 82:%04x 83:%04x 84:%04x "
1382 "85:%04x 86:%04x 87:%04x 88:%04x\n",
Borislav Petkov0dd4b212006-06-23 02:29:08 -04001383 __FUNCTION__,
Tejun Heof15a1da2006-05-15 20:57:56 +09001384 id[49], id[82], id[83], id[84],
1385 id[85], id[86], id[87], id[88]);
Tejun Heoc39f5eb2006-03-13 19:51:19 +09001386
Tejun Heo208a9932006-03-05 17:55:58 +09001387 /* initialize to-be-configured parameters */
Tejun Heoea1dd4e2006-04-02 18:51:53 +09001388 dev->flags &= ~ATA_DFLAG_CFG_MASK;
Tejun Heo208a9932006-03-05 17:55:58 +09001389 dev->max_sectors = 0;
1390 dev->cdb_len = 0;
1391 dev->n_sectors = 0;
1392 dev->cylinders = 0;
1393 dev->heads = 0;
1394 dev->sectors = 0;
1395
Linus Torvalds1da177e2005-04-16 15:20:36 -07001396 /*
1397 * common ATA, ATAPI feature tests
1398 */
1399
Tejun Heoff8854b2006-03-06 04:31:56 +09001400 /* find max transfer mode; for printk only */
Tejun Heo1148c3a2006-03-13 19:48:04 +09001401 xfer_mask = ata_id_xfermask(id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001402
Borislav Petkov0dd4b212006-06-23 02:29:08 -04001403 if (ata_msg_probe(ap))
1404 ata_dump_id(id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001405
1406 /* ATA-specific feature tests */
1407 if (dev->class == ATA_DEV_ATA) {
Tejun Heo1148c3a2006-03-13 19:48:04 +09001408 dev->n_sectors = ata_id_n_sectors(id);
Tejun Heo29407402006-02-12 22:47:04 +09001409
Tejun Heo1148c3a2006-03-13 19:48:04 +09001410 if (ata_id_has_lba(id)) {
Tejun Heo4c2d7212006-03-05 17:55:58 +09001411 const char *lba_desc;
Tejun Heoa6e6ce82006-05-15 21:03:48 +09001412 char ncq_desc[20];
Albert Lee8bf62ece2005-05-12 15:29:42 -04001413
Tejun Heo4c2d7212006-03-05 17:55:58 +09001414 lba_desc = "LBA";
1415 dev->flags |= ATA_DFLAG_LBA;
Tejun Heo1148c3a2006-03-13 19:48:04 +09001416 if (ata_id_has_lba48(id)) {
Albert Lee8bf62ece2005-05-12 15:29:42 -04001417 dev->flags |= ATA_DFLAG_LBA48;
Tejun Heo4c2d7212006-03-05 17:55:58 +09001418 lba_desc = "LBA48";
1419 }
Albert Lee8bf62ece2005-05-12 15:29:42 -04001420
Tejun Heoa6e6ce82006-05-15 21:03:48 +09001421 /* config NCQ */
1422 ata_dev_config_ncq(dev, ncq_desc, sizeof(ncq_desc));
1423
Albert Lee8bf62ece2005-05-12 15:29:42 -04001424 /* print device info to dmesg */
Borislav Petkov5afc8142006-06-27 14:51:25 +02001425 if (ata_msg_drv(ap) && print_info)
Tejun Heof15a1da2006-05-15 20:57:56 +09001426 ata_dev_printk(dev, KERN_INFO, "ATA-%d, "
Tejun Heoa6e6ce82006-05-15 21:03:48 +09001427 "max %s, %Lu sectors: %s %s\n",
Tejun Heof15a1da2006-05-15 20:57:56 +09001428 ata_id_major_version(id),
1429 ata_mode_string(xfer_mask),
1430 (unsigned long long)dev->n_sectors,
Tejun Heoa6e6ce82006-05-15 21:03:48 +09001431 lba_desc, ncq_desc);
Tejun Heoffeae412006-03-01 16:09:35 +09001432 } else {
Albert Lee8bf62ece2005-05-12 15:29:42 -04001433 /* CHS */
1434
1435 /* Default translation */
Tejun Heo1148c3a2006-03-13 19:48:04 +09001436 dev->cylinders = id[1];
1437 dev->heads = id[3];
1438 dev->sectors = id[6];
Albert Lee8bf62ece2005-05-12 15:29:42 -04001439
Tejun Heo1148c3a2006-03-13 19:48:04 +09001440 if (ata_id_current_chs_valid(id)) {
Albert Lee8bf62ece2005-05-12 15:29:42 -04001441 /* Current CHS translation is valid. */
Tejun Heo1148c3a2006-03-13 19:48:04 +09001442 dev->cylinders = id[54];
1443 dev->heads = id[55];
1444 dev->sectors = id[56];
Albert Lee8bf62ece2005-05-12 15:29:42 -04001445 }
1446
1447 /* print device info to dmesg */
Borislav Petkov5afc8142006-06-27 14:51:25 +02001448 if (ata_msg_drv(ap) && print_info)
Tejun Heof15a1da2006-05-15 20:57:56 +09001449 ata_dev_printk(dev, KERN_INFO, "ATA-%d, "
1450 "max %s, %Lu sectors: CHS %u/%u/%u\n",
1451 ata_id_major_version(id),
1452 ata_mode_string(xfer_mask),
1453 (unsigned long long)dev->n_sectors,
Tejun Heo88574552006-06-25 20:00:35 +09001454 dev->cylinders, dev->heads,
1455 dev->sectors);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001456 }
1457
Albert Lee07f6f7d2005-11-01 19:33:20 +08001458 if (dev->id[59] & 0x100) {
1459 dev->multi_count = dev->id[59] & 0xff;
Borislav Petkov5afc8142006-06-27 14:51:25 +02001460 if (ata_msg_drv(ap) && print_info)
Tejun Heo88574552006-06-25 20:00:35 +09001461 ata_dev_printk(dev, KERN_INFO,
1462 "ata%u: dev %u multi count %u\n",
1463 ap->id, dev->devno, dev->multi_count);
Albert Lee07f6f7d2005-11-01 19:33:20 +08001464 }
1465
Tejun Heo6e7846e2006-02-12 23:32:58 +09001466 dev->cdb_len = 16;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001467 }
1468
1469 /* ATAPI-specific feature tests */
Jeff Garzik2c13b7c2005-11-14 14:14:16 -05001470 else if (dev->class == ATA_DEV_ATAPI) {
Albert Lee08a556d2006-03-31 13:29:04 +08001471 char *cdb_intr_string = "";
1472
Tejun Heo1148c3a2006-03-13 19:48:04 +09001473 rc = atapi_cdb_len(id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001474 if ((rc < 12) || (rc > ATAPI_CDB_LEN)) {
Borislav Petkov0dd4b212006-06-23 02:29:08 -04001475 if (ata_msg_warn(ap))
Tejun Heo88574552006-06-25 20:00:35 +09001476 ata_dev_printk(dev, KERN_WARNING,
1477 "unsupported CDB len\n");
Tejun Heoffeae412006-03-01 16:09:35 +09001478 rc = -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001479 goto err_out_nosup;
1480 }
Tejun Heo6e7846e2006-02-12 23:32:58 +09001481 dev->cdb_len = (unsigned int) rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001482
Albert Lee08a556d2006-03-31 13:29:04 +08001483 if (ata_id_cdb_intr(dev->id)) {
Albert Lee312f7da2005-09-27 17:38:03 +08001484 dev->flags |= ATA_DFLAG_CDB_INTR;
Albert Lee08a556d2006-03-31 13:29:04 +08001485 cdb_intr_string = ", CDB intr";
1486 }
Albert Lee312f7da2005-09-27 17:38:03 +08001487
Linus Torvalds1da177e2005-04-16 15:20:36 -07001488 /* print device info to dmesg */
Borislav Petkov5afc8142006-06-27 14:51:25 +02001489 if (ata_msg_drv(ap) && print_info)
Tejun Heo12436c32006-05-15 20:59:15 +09001490 ata_dev_printk(dev, KERN_INFO, "ATAPI, max %s%s\n",
1491 ata_mode_string(xfer_mask),
1492 cdb_intr_string);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001493 }
1494
Brian Kinge6d902a2006-06-28 08:30:31 -05001495 ata_set_port_max_cmd_len(ap);
Tejun Heo6e7846e2006-02-12 23:32:58 +09001496
Tejun Heo4b2f3ed2006-03-01 16:09:36 +09001497 /* limit bridge transfers to udma5, 200 sectors */
Tejun Heo3373efd2006-05-15 20:57:53 +09001498 if (ata_dev_knobble(dev)) {
Borislav Petkov5afc8142006-06-27 14:51:25 +02001499 if (ata_msg_drv(ap) && print_info)
Tejun Heof15a1da2006-05-15 20:57:56 +09001500 ata_dev_printk(dev, KERN_INFO,
1501 "applying bridge limits\n");
Tejun Heo5a529132006-03-24 14:07:50 +09001502 dev->udma_mask &= ATA_UDMA5;
Tejun Heo4b2f3ed2006-03-01 16:09:36 +09001503 dev->max_sectors = ATA_MAX_SECTORS;
1504 }
1505
1506 if (ap->ops->dev_config)
1507 ap->ops->dev_config(ap, dev);
1508
Borislav Petkov0dd4b212006-06-23 02:29:08 -04001509 if (ata_msg_probe(ap))
1510 ata_dev_printk(dev, KERN_DEBUG, "%s: EXIT, drv_stat = 0x%x\n",
1511 __FUNCTION__, ata_chk_status(ap));
Tejun Heoffeae412006-03-01 16:09:35 +09001512 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001513
1514err_out_nosup:
Borislav Petkov0dd4b212006-06-23 02:29:08 -04001515 if (ata_msg_probe(ap))
Tejun Heo88574552006-06-25 20:00:35 +09001516 ata_dev_printk(dev, KERN_DEBUG,
1517 "%s: EXIT, err\n", __FUNCTION__);
Tejun Heoffeae412006-03-01 16:09:35 +09001518 return rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001519}
1520
1521/**
1522 * ata_bus_probe - Reset and probe ATA bus
1523 * @ap: Bus to probe
1524 *
Jeff Garzik0cba6322005-05-30 19:49:12 -04001525 * Master ATA bus probing function. Initiates a hardware-dependent
1526 * bus reset, then attempts to identify any devices found on
1527 * the bus.
1528 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07001529 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04001530 * PCI/etc. bus probe sem.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001531 *
1532 * RETURNS:
Tejun Heo96072e62006-04-01 01:38:17 +09001533 * Zero on success, negative errno otherwise.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001534 */
1535
1536static int ata_bus_probe(struct ata_port *ap)
1537{
Tejun Heo28ca5c52006-03-01 16:09:36 +09001538 unsigned int classes[ATA_MAX_DEVICES];
Tejun Heo14d2bac2006-04-02 17:54:46 +09001539 int tries[ATA_MAX_DEVICES];
1540 int i, rc, down_xfermask;
Tejun Heoe82cbdb2006-04-01 01:38:18 +09001541 struct ata_device *dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001542
Tejun Heo28ca5c52006-03-01 16:09:36 +09001543 ata_port_probe(ap);
1544
Tejun Heo14d2bac2006-04-02 17:54:46 +09001545 for (i = 0; i < ATA_MAX_DEVICES; i++)
1546 tries[i] = ATA_PROBE_MAX_TRIES;
1547
1548 retry:
1549 down_xfermask = 0;
1550
Tejun Heo20444702006-03-13 01:57:01 +09001551 /* reset and determine device classes */
Tejun Heo52783c52006-05-31 18:28:22 +09001552 ap->ops->phy_reset(ap);
Tejun Heo2061a472006-03-12 00:57:39 +09001553
Tejun Heo52783c52006-05-31 18:28:22 +09001554 for (i = 0; i < ATA_MAX_DEVICES; i++) {
1555 dev = &ap->device[i];
Tejun Heoc19ba8a2006-01-24 17:05:22 +09001556
Tejun Heo52783c52006-05-31 18:28:22 +09001557 if (!(ap->flags & ATA_FLAG_DISABLED) &&
1558 dev->class != ATA_DEV_UNKNOWN)
1559 classes[dev->devno] = dev->class;
1560 else
1561 classes[dev->devno] = ATA_DEV_NONE;
Tejun Heo20444702006-03-13 01:57:01 +09001562
Tejun Heo52783c52006-05-31 18:28:22 +09001563 dev->class = ATA_DEV_UNKNOWN;
Tejun Heo28ca5c52006-03-01 16:09:36 +09001564 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001565
Tejun Heo52783c52006-05-31 18:28:22 +09001566 ata_port_probe(ap);
Tejun Heo20444702006-03-13 01:57:01 +09001567
Alan Coxb6079ca2006-05-22 16:52:06 +01001568 /* after the reset the device state is PIO 0 and the controller
1569 state is undefined. Record the mode */
1570
1571 for (i = 0; i < ATA_MAX_DEVICES; i++)
1572 ap->device[i].pio_mode = XFER_PIO_0;
1573
Tejun Heo28ca5c52006-03-01 16:09:36 +09001574 /* read IDENTIFY page and configure devices */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001575 for (i = 0; i < ATA_MAX_DEVICES; i++) {
Tejun Heoe82cbdb2006-04-01 01:38:18 +09001576 dev = &ap->device[i];
Tejun Heo28ca5c52006-03-01 16:09:36 +09001577
Tejun Heoec573752006-04-11 22:26:29 +09001578 if (tries[i])
1579 dev->class = classes[i];
Tejun Heo14d2bac2006-04-02 17:54:46 +09001580
Tejun Heoe1211e32006-04-01 01:38:18 +09001581 if (!ata_dev_enabled(dev))
Tejun Heoffeae412006-03-01 16:09:35 +09001582 continue;
1583
Tejun Heo3373efd2006-05-15 20:57:53 +09001584 rc = ata_dev_read_id(dev, &dev->class, 1, dev->id);
Tejun Heo14d2bac2006-04-02 17:54:46 +09001585 if (rc)
1586 goto fail;
Tejun Heoffeae412006-03-01 16:09:35 +09001587
Tejun Heo3373efd2006-05-15 20:57:53 +09001588 rc = ata_dev_configure(dev, 1);
Tejun Heo14d2bac2006-04-02 17:54:46 +09001589 if (rc)
1590 goto fail;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001591 }
1592
Tejun Heoe82cbdb2006-04-01 01:38:18 +09001593 /* configure transfer mode */
Tejun Heo3adcebb2006-05-15 20:57:37 +09001594 rc = ata_set_mode(ap, &dev);
Tejun Heo51713d32006-04-11 22:26:29 +09001595 if (rc) {
1596 down_xfermask = 1;
1597 goto fail;
Tejun Heoe82cbdb2006-04-01 01:38:18 +09001598 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001599
Tejun Heoe82cbdb2006-04-01 01:38:18 +09001600 for (i = 0; i < ATA_MAX_DEVICES; i++)
1601 if (ata_dev_enabled(&ap->device[i]))
1602 return 0;
Alan Coxe35a9e02006-03-27 18:46:37 +01001603
Tejun Heoe82cbdb2006-04-01 01:38:18 +09001604 /* no device present, disable port */
1605 ata_port_disable(ap);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001606 ap->ops->port_disable(ap);
Tejun Heo96072e62006-04-01 01:38:17 +09001607 return -ENODEV;
Tejun Heo14d2bac2006-04-02 17:54:46 +09001608
1609 fail:
1610 switch (rc) {
1611 case -EINVAL:
1612 case -ENODEV:
1613 tries[dev->devno] = 0;
1614 break;
1615 case -EIO:
Tejun Heo3c567b72006-05-15 20:57:23 +09001616 sata_down_spd_limit(ap);
Tejun Heo14d2bac2006-04-02 17:54:46 +09001617 /* fall through */
1618 default:
1619 tries[dev->devno]--;
1620 if (down_xfermask &&
Tejun Heo3373efd2006-05-15 20:57:53 +09001621 ata_down_xfermask_limit(dev, tries[dev->devno] == 1))
Tejun Heo14d2bac2006-04-02 17:54:46 +09001622 tries[dev->devno] = 0;
1623 }
1624
Tejun Heoec573752006-04-11 22:26:29 +09001625 if (!tries[dev->devno]) {
Tejun Heo3373efd2006-05-15 20:57:53 +09001626 ata_down_xfermask_limit(dev, 1);
1627 ata_dev_disable(dev);
Tejun Heoec573752006-04-11 22:26:29 +09001628 }
1629
Tejun Heo14d2bac2006-04-02 17:54:46 +09001630 goto retry;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001631}
1632
1633/**
Jeff Garzik0cba6322005-05-30 19:49:12 -04001634 * ata_port_probe - Mark port as enabled
1635 * @ap: Port for which we indicate enablement
Linus Torvalds1da177e2005-04-16 15:20:36 -07001636 *
Jeff Garzik0cba6322005-05-30 19:49:12 -04001637 * Modify @ap data structure such that the system
1638 * thinks that the entire port is enabled.
1639 *
1640 * LOCKING: host_set lock, or some other form of
1641 * serialization.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001642 */
1643
1644void ata_port_probe(struct ata_port *ap)
1645{
Tejun Heo198e0fe2006-04-02 18:51:52 +09001646 ap->flags &= ~ATA_FLAG_DISABLED;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001647}
1648
1649/**
Tejun Heo3be680b2005-12-19 22:35:02 +09001650 * sata_print_link_status - Print SATA link status
1651 * @ap: SATA port to printk link status about
1652 *
1653 * This function prints link speed and status of a SATA link.
1654 *
1655 * LOCKING:
1656 * None.
1657 */
1658static void sata_print_link_status(struct ata_port *ap)
1659{
Tejun Heo6d5f9732006-04-03 00:09:41 +09001660 u32 sstatus, scontrol, tmp;
Tejun Heo3be680b2005-12-19 22:35:02 +09001661
Tejun Heo81952c52006-05-15 20:57:47 +09001662 if (sata_scr_read(ap, SCR_STATUS, &sstatus))
Tejun Heo3be680b2005-12-19 22:35:02 +09001663 return;
Tejun Heo81952c52006-05-15 20:57:47 +09001664 sata_scr_read(ap, SCR_CONTROL, &scontrol);
Tejun Heo3be680b2005-12-19 22:35:02 +09001665
Tejun Heo81952c52006-05-15 20:57:47 +09001666 if (ata_port_online(ap)) {
Tejun Heo3be680b2005-12-19 22:35:02 +09001667 tmp = (sstatus >> 4) & 0xf;
Tejun Heof15a1da2006-05-15 20:57:56 +09001668 ata_port_printk(ap, KERN_INFO,
1669 "SATA link up %s (SStatus %X SControl %X)\n",
1670 sata_spd_string(tmp), sstatus, scontrol);
Tejun Heo3be680b2005-12-19 22:35:02 +09001671 } else {
Tejun Heof15a1da2006-05-15 20:57:56 +09001672 ata_port_printk(ap, KERN_INFO,
1673 "SATA link down (SStatus %X SControl %X)\n",
1674 sstatus, scontrol);
Tejun Heo3be680b2005-12-19 22:35:02 +09001675 }
1676}
1677
1678/**
Jeff Garzik780a87f2005-05-30 15:41:05 -04001679 * __sata_phy_reset - Wake/reset a low-level SATA PHY
1680 * @ap: SATA port associated with target SATA PHY.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001681 *
Jeff Garzik780a87f2005-05-30 15:41:05 -04001682 * This function issues commands to standard SATA Sxxx
1683 * PHY registers, to wake up the phy (and device), and
1684 * clear any reset condition.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001685 *
1686 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04001687 * PCI/etc. bus probe sem.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001688 *
1689 */
1690void __sata_phy_reset(struct ata_port *ap)
1691{
1692 u32 sstatus;
1693 unsigned long timeout = jiffies + (HZ * 5);
1694
1695 if (ap->flags & ATA_FLAG_SATA_RESET) {
Brett Russcdcca89e2005-03-28 15:10:27 -05001696 /* issue phy wake/reset */
Tejun Heo81952c52006-05-15 20:57:47 +09001697 sata_scr_write_flush(ap, SCR_CONTROL, 0x301);
Tejun Heo62ba2842005-06-26 23:27:19 +09001698 /* Couldn't find anything in SATA I/II specs, but
1699 * AHCI-1.1 10.4.2 says at least 1 ms. */
1700 mdelay(1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001701 }
Tejun Heo81952c52006-05-15 20:57:47 +09001702 /* phy wake/clear reset */
1703 sata_scr_write_flush(ap, SCR_CONTROL, 0x300);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001704
1705 /* wait for phy to become ready, if necessary */
1706 do {
1707 msleep(200);
Tejun Heo81952c52006-05-15 20:57:47 +09001708 sata_scr_read(ap, SCR_STATUS, &sstatus);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001709 if ((sstatus & 0xf) != 1)
1710 break;
1711 } while (time_before(jiffies, timeout));
1712
Tejun Heo3be680b2005-12-19 22:35:02 +09001713 /* print link status */
1714 sata_print_link_status(ap);
Jeff Garzik656563e2005-11-20 03:36:45 -05001715
Tejun Heo3be680b2005-12-19 22:35:02 +09001716 /* TODO: phy layer with polling, timeouts, etc. */
Tejun Heo81952c52006-05-15 20:57:47 +09001717 if (!ata_port_offline(ap))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001718 ata_port_probe(ap);
Tejun Heo3be680b2005-12-19 22:35:02 +09001719 else
Linus Torvalds1da177e2005-04-16 15:20:36 -07001720 ata_port_disable(ap);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001721
Tejun Heo198e0fe2006-04-02 18:51:52 +09001722 if (ap->flags & ATA_FLAG_DISABLED)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001723 return;
1724
1725 if (ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT)) {
1726 ata_port_disable(ap);
1727 return;
1728 }
1729
1730 ap->cbl = ATA_CBL_SATA;
1731}
1732
1733/**
Jeff Garzik780a87f2005-05-30 15:41:05 -04001734 * sata_phy_reset - Reset SATA bus.
1735 * @ap: SATA port associated with target SATA PHY.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001736 *
Jeff Garzik780a87f2005-05-30 15:41:05 -04001737 * This function resets the SATA bus, and then probes
1738 * the bus for devices.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001739 *
1740 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04001741 * PCI/etc. bus probe sem.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001742 *
1743 */
1744void sata_phy_reset(struct ata_port *ap)
1745{
1746 __sata_phy_reset(ap);
Tejun Heo198e0fe2006-04-02 18:51:52 +09001747 if (ap->flags & ATA_FLAG_DISABLED)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001748 return;
1749 ata_bus_reset(ap);
1750}
1751
1752/**
Alan Coxebdfca62006-03-23 15:38:34 +00001753 * ata_dev_pair - return other device on cable
Alan Coxebdfca62006-03-23 15:38:34 +00001754 * @adev: device
1755 *
1756 * Obtain the other device on the same cable, or if none is
1757 * present NULL is returned
1758 */
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05001759
Tejun Heo3373efd2006-05-15 20:57:53 +09001760struct ata_device *ata_dev_pair(struct ata_device *adev)
Alan Coxebdfca62006-03-23 15:38:34 +00001761{
Tejun Heo3373efd2006-05-15 20:57:53 +09001762 struct ata_port *ap = adev->ap;
Alan Coxebdfca62006-03-23 15:38:34 +00001763 struct ata_device *pair = &ap->device[1 - adev->devno];
Tejun Heoe1211e32006-04-01 01:38:18 +09001764 if (!ata_dev_enabled(pair))
Alan Coxebdfca62006-03-23 15:38:34 +00001765 return NULL;
1766 return pair;
1767}
1768
1769/**
Jeff Garzik780a87f2005-05-30 15:41:05 -04001770 * ata_port_disable - Disable port.
1771 * @ap: Port to be disabled.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001772 *
Jeff Garzik780a87f2005-05-30 15:41:05 -04001773 * Modify @ap data structure such that the system
1774 * thinks that the entire port is disabled, and should
1775 * never attempt to probe or communicate with devices
1776 * on this port.
1777 *
1778 * LOCKING: host_set lock, or some other form of
1779 * serialization.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001780 */
1781
1782void ata_port_disable(struct ata_port *ap)
1783{
1784 ap->device[0].class = ATA_DEV_NONE;
1785 ap->device[1].class = ATA_DEV_NONE;
Tejun Heo198e0fe2006-04-02 18:51:52 +09001786 ap->flags |= ATA_FLAG_DISABLED;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001787}
1788
Tejun Heo1c3fae42006-04-02 20:53:28 +09001789/**
Tejun Heo3c567b72006-05-15 20:57:23 +09001790 * sata_down_spd_limit - adjust SATA spd limit downward
Tejun Heo1c3fae42006-04-02 20:53:28 +09001791 * @ap: Port to adjust SATA spd limit for
1792 *
1793 * Adjust SATA spd limit of @ap downward. Note that this
1794 * function only adjusts the limit. The change must be applied
Tejun Heo3c567b72006-05-15 20:57:23 +09001795 * using sata_set_spd().
Tejun Heo1c3fae42006-04-02 20:53:28 +09001796 *
1797 * LOCKING:
1798 * Inherited from caller.
1799 *
1800 * RETURNS:
1801 * 0 on success, negative errno on failure
1802 */
Tejun Heo3c567b72006-05-15 20:57:23 +09001803int sata_down_spd_limit(struct ata_port *ap)
Tejun Heo1c3fae42006-04-02 20:53:28 +09001804{
Tejun Heo81952c52006-05-15 20:57:47 +09001805 u32 sstatus, spd, mask;
1806 int rc, highbit;
Tejun Heo1c3fae42006-04-02 20:53:28 +09001807
Tejun Heo81952c52006-05-15 20:57:47 +09001808 rc = sata_scr_read(ap, SCR_STATUS, &sstatus);
1809 if (rc)
1810 return rc;
Tejun Heo1c3fae42006-04-02 20:53:28 +09001811
1812 mask = ap->sata_spd_limit;
1813 if (mask <= 1)
1814 return -EINVAL;
1815 highbit = fls(mask) - 1;
1816 mask &= ~(1 << highbit);
1817
Tejun Heo81952c52006-05-15 20:57:47 +09001818 spd = (sstatus >> 4) & 0xf;
Tejun Heo1c3fae42006-04-02 20:53:28 +09001819 if (spd <= 1)
1820 return -EINVAL;
1821 spd--;
1822 mask &= (1 << spd) - 1;
1823 if (!mask)
1824 return -EINVAL;
1825
1826 ap->sata_spd_limit = mask;
1827
Tejun Heof15a1da2006-05-15 20:57:56 +09001828 ata_port_printk(ap, KERN_WARNING, "limiting SATA link speed to %s\n",
1829 sata_spd_string(fls(mask)));
Tejun Heo1c3fae42006-04-02 20:53:28 +09001830
1831 return 0;
1832}
1833
Tejun Heo3c567b72006-05-15 20:57:23 +09001834static int __sata_set_spd_needed(struct ata_port *ap, u32 *scontrol)
Tejun Heo1c3fae42006-04-02 20:53:28 +09001835{
1836 u32 spd, limit;
1837
1838 if (ap->sata_spd_limit == UINT_MAX)
1839 limit = 0;
1840 else
1841 limit = fls(ap->sata_spd_limit);
1842
1843 spd = (*scontrol >> 4) & 0xf;
1844 *scontrol = (*scontrol & ~0xf0) | ((limit & 0xf) << 4);
1845
1846 return spd != limit;
1847}
1848
1849/**
Tejun Heo3c567b72006-05-15 20:57:23 +09001850 * sata_set_spd_needed - is SATA spd configuration needed
Tejun Heo1c3fae42006-04-02 20:53:28 +09001851 * @ap: Port in question
1852 *
1853 * Test whether the spd limit in SControl matches
1854 * @ap->sata_spd_limit. This function is used to determine
1855 * whether hardreset is necessary to apply SATA spd
1856 * configuration.
1857 *
1858 * LOCKING:
1859 * Inherited from caller.
1860 *
1861 * RETURNS:
1862 * 1 if SATA spd configuration is needed, 0 otherwise.
1863 */
Tejun Heo3c567b72006-05-15 20:57:23 +09001864int sata_set_spd_needed(struct ata_port *ap)
Tejun Heo1c3fae42006-04-02 20:53:28 +09001865{
1866 u32 scontrol;
1867
Tejun Heo81952c52006-05-15 20:57:47 +09001868 if (sata_scr_read(ap, SCR_CONTROL, &scontrol))
Tejun Heo1c3fae42006-04-02 20:53:28 +09001869 return 0;
1870
Tejun Heo3c567b72006-05-15 20:57:23 +09001871 return __sata_set_spd_needed(ap, &scontrol);
Tejun Heo1c3fae42006-04-02 20:53:28 +09001872}
1873
1874/**
Tejun Heo3c567b72006-05-15 20:57:23 +09001875 * sata_set_spd - set SATA spd according to spd limit
Tejun Heo1c3fae42006-04-02 20:53:28 +09001876 * @ap: Port to set SATA spd for
1877 *
1878 * Set SATA spd of @ap according to sata_spd_limit.
1879 *
1880 * LOCKING:
1881 * Inherited from caller.
1882 *
1883 * RETURNS:
1884 * 0 if spd doesn't need to be changed, 1 if spd has been
Tejun Heo81952c52006-05-15 20:57:47 +09001885 * changed. Negative errno if SCR registers are inaccessible.
Tejun Heo1c3fae42006-04-02 20:53:28 +09001886 */
Tejun Heo3c567b72006-05-15 20:57:23 +09001887int sata_set_spd(struct ata_port *ap)
Tejun Heo1c3fae42006-04-02 20:53:28 +09001888{
1889 u32 scontrol;
Tejun Heo81952c52006-05-15 20:57:47 +09001890 int rc;
Tejun Heo1c3fae42006-04-02 20:53:28 +09001891
Tejun Heo81952c52006-05-15 20:57:47 +09001892 if ((rc = sata_scr_read(ap, SCR_CONTROL, &scontrol)))
1893 return rc;
Tejun Heo1c3fae42006-04-02 20:53:28 +09001894
Tejun Heo3c567b72006-05-15 20:57:23 +09001895 if (!__sata_set_spd_needed(ap, &scontrol))
Tejun Heo1c3fae42006-04-02 20:53:28 +09001896 return 0;
1897
Tejun Heo81952c52006-05-15 20:57:47 +09001898 if ((rc = sata_scr_write(ap, SCR_CONTROL, scontrol)))
1899 return rc;
1900
Tejun Heo1c3fae42006-04-02 20:53:28 +09001901 return 1;
1902}
1903
Alan Cox452503f2005-10-21 19:01:32 -04001904/*
1905 * This mode timing computation functionality is ported over from
1906 * drivers/ide/ide-timing.h and was originally written by Vojtech Pavlik
1907 */
1908/*
1909 * PIO 0-5, MWDMA 0-2 and UDMA 0-6 timings (in nanoseconds).
1910 * These were taken from ATA/ATAPI-6 standard, rev 0a, except
1911 * for PIO 5, which is a nonstandard extension and UDMA6, which
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05001912 * is currently supported only by Maxtor drives.
Alan Cox452503f2005-10-21 19:01:32 -04001913 */
1914
1915static const struct ata_timing ata_timing[] = {
1916
1917 { XFER_UDMA_6, 0, 0, 0, 0, 0, 0, 0, 15 },
1918 { XFER_UDMA_5, 0, 0, 0, 0, 0, 0, 0, 20 },
1919 { XFER_UDMA_4, 0, 0, 0, 0, 0, 0, 0, 30 },
1920 { XFER_UDMA_3, 0, 0, 0, 0, 0, 0, 0, 45 },
1921
1922 { XFER_UDMA_2, 0, 0, 0, 0, 0, 0, 0, 60 },
1923 { XFER_UDMA_1, 0, 0, 0, 0, 0, 0, 0, 80 },
1924 { XFER_UDMA_0, 0, 0, 0, 0, 0, 0, 0, 120 },
1925
1926/* { XFER_UDMA_SLOW, 0, 0, 0, 0, 0, 0, 0, 150 }, */
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05001927
Alan Cox452503f2005-10-21 19:01:32 -04001928 { XFER_MW_DMA_2, 25, 0, 0, 0, 70, 25, 120, 0 },
1929 { XFER_MW_DMA_1, 45, 0, 0, 0, 80, 50, 150, 0 },
1930 { XFER_MW_DMA_0, 60, 0, 0, 0, 215, 215, 480, 0 },
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05001931
Alan Cox452503f2005-10-21 19:01:32 -04001932 { XFER_SW_DMA_2, 60, 0, 0, 0, 120, 120, 240, 0 },
1933 { XFER_SW_DMA_1, 90, 0, 0, 0, 240, 240, 480, 0 },
1934 { XFER_SW_DMA_0, 120, 0, 0, 0, 480, 480, 960, 0 },
1935
1936/* { XFER_PIO_5, 20, 50, 30, 100, 50, 30, 100, 0 }, */
1937 { XFER_PIO_4, 25, 70, 25, 120, 70, 25, 120, 0 },
1938 { XFER_PIO_3, 30, 80, 70, 180, 80, 70, 180, 0 },
1939
1940 { XFER_PIO_2, 30, 290, 40, 330, 100, 90, 240, 0 },
1941 { XFER_PIO_1, 50, 290, 93, 383, 125, 100, 383, 0 },
1942 { XFER_PIO_0, 70, 290, 240, 600, 165, 150, 600, 0 },
1943
1944/* { XFER_PIO_SLOW, 120, 290, 240, 960, 290, 240, 960, 0 }, */
1945
1946 { 0xFF }
1947};
1948
1949#define ENOUGH(v,unit) (((v)-1)/(unit)+1)
1950#define EZ(v,unit) ((v)?ENOUGH(v,unit):0)
1951
1952static void ata_timing_quantize(const struct ata_timing *t, struct ata_timing *q, int T, int UT)
1953{
1954 q->setup = EZ(t->setup * 1000, T);
1955 q->act8b = EZ(t->act8b * 1000, T);
1956 q->rec8b = EZ(t->rec8b * 1000, T);
1957 q->cyc8b = EZ(t->cyc8b * 1000, T);
1958 q->active = EZ(t->active * 1000, T);
1959 q->recover = EZ(t->recover * 1000, T);
1960 q->cycle = EZ(t->cycle * 1000, T);
1961 q->udma = EZ(t->udma * 1000, UT);
1962}
1963
1964void ata_timing_merge(const struct ata_timing *a, const struct ata_timing *b,
1965 struct ata_timing *m, unsigned int what)
1966{
1967 if (what & ATA_TIMING_SETUP ) m->setup = max(a->setup, b->setup);
1968 if (what & ATA_TIMING_ACT8B ) m->act8b = max(a->act8b, b->act8b);
1969 if (what & ATA_TIMING_REC8B ) m->rec8b = max(a->rec8b, b->rec8b);
1970 if (what & ATA_TIMING_CYC8B ) m->cyc8b = max(a->cyc8b, b->cyc8b);
1971 if (what & ATA_TIMING_ACTIVE ) m->active = max(a->active, b->active);
1972 if (what & ATA_TIMING_RECOVER) m->recover = max(a->recover, b->recover);
1973 if (what & ATA_TIMING_CYCLE ) m->cycle = max(a->cycle, b->cycle);
1974 if (what & ATA_TIMING_UDMA ) m->udma = max(a->udma, b->udma);
1975}
1976
1977static const struct ata_timing* ata_timing_find_mode(unsigned short speed)
1978{
1979 const struct ata_timing *t;
1980
1981 for (t = ata_timing; t->mode != speed; t++)
Alan Cox91190752005-10-26 12:17:46 -04001982 if (t->mode == 0xFF)
Alan Cox452503f2005-10-21 19:01:32 -04001983 return NULL;
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05001984 return t;
Alan Cox452503f2005-10-21 19:01:32 -04001985}
1986
1987int ata_timing_compute(struct ata_device *adev, unsigned short speed,
1988 struct ata_timing *t, int T, int UT)
1989{
1990 const struct ata_timing *s;
1991 struct ata_timing p;
1992
1993 /*
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05001994 * Find the mode.
Albert Lee75b1f2f2005-11-16 17:06:18 +08001995 */
Alan Cox452503f2005-10-21 19:01:32 -04001996
1997 if (!(s = ata_timing_find_mode(speed)))
1998 return -EINVAL;
1999
Albert Lee75b1f2f2005-11-16 17:06:18 +08002000 memcpy(t, s, sizeof(*s));
2001
Alan Cox452503f2005-10-21 19:01:32 -04002002 /*
2003 * If the drive is an EIDE drive, it can tell us it needs extended
2004 * PIO/MW_DMA cycle timing.
2005 */
2006
2007 if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE drive */
2008 memset(&p, 0, sizeof(p));
2009 if(speed >= XFER_PIO_0 && speed <= XFER_SW_DMA_0) {
2010 if (speed <= XFER_PIO_2) p.cycle = p.cyc8b = adev->id[ATA_ID_EIDE_PIO];
2011 else p.cycle = p.cyc8b = adev->id[ATA_ID_EIDE_PIO_IORDY];
2012 } else if(speed >= XFER_MW_DMA_0 && speed <= XFER_MW_DMA_2) {
2013 p.cycle = adev->id[ATA_ID_EIDE_DMA_MIN];
2014 }
2015 ata_timing_merge(&p, t, t, ATA_TIMING_CYCLE | ATA_TIMING_CYC8B);
2016 }
2017
2018 /*
2019 * Convert the timing to bus clock counts.
2020 */
2021
Albert Lee75b1f2f2005-11-16 17:06:18 +08002022 ata_timing_quantize(t, t, T, UT);
Alan Cox452503f2005-10-21 19:01:32 -04002023
2024 /*
Randy Dunlapc893a3a2006-01-28 13:15:32 -05002025 * Even in DMA/UDMA modes we still use PIO access for IDENTIFY,
2026 * S.M.A.R.T * and some other commands. We have to ensure that the
2027 * DMA cycle timing is slower/equal than the fastest PIO timing.
Alan Cox452503f2005-10-21 19:01:32 -04002028 */
2029
2030 if (speed > XFER_PIO_4) {
2031 ata_timing_compute(adev, adev->pio_mode, &p, T, UT);
2032 ata_timing_merge(&p, t, t, ATA_TIMING_ALL);
2033 }
2034
2035 /*
Randy Dunlapc893a3a2006-01-28 13:15:32 -05002036 * Lengthen active & recovery time so that cycle time is correct.
Alan Cox452503f2005-10-21 19:01:32 -04002037 */
2038
2039 if (t->act8b + t->rec8b < t->cyc8b) {
2040 t->act8b += (t->cyc8b - (t->act8b + t->rec8b)) / 2;
2041 t->rec8b = t->cyc8b - t->act8b;
2042 }
2043
2044 if (t->active + t->recover < t->cycle) {
2045 t->active += (t->cycle - (t->active + t->recover)) / 2;
2046 t->recover = t->cycle - t->active;
2047 }
2048
2049 return 0;
2050}
2051
Tejun Heocf176e12006-04-02 17:54:46 +09002052/**
2053 * ata_down_xfermask_limit - adjust dev xfer masks downward
Tejun Heocf176e12006-04-02 17:54:46 +09002054 * @dev: Device to adjust xfer masks
2055 * @force_pio0: Force PIO0
2056 *
2057 * Adjust xfer masks of @dev downward. Note that this function
2058 * does not apply the change. Invoking ata_set_mode() afterwards
2059 * will apply the limit.
2060 *
2061 * LOCKING:
2062 * Inherited from caller.
2063 *
2064 * RETURNS:
2065 * 0 on success, negative errno on failure
2066 */
Tejun Heo3373efd2006-05-15 20:57:53 +09002067int ata_down_xfermask_limit(struct ata_device *dev, int force_pio0)
Tejun Heocf176e12006-04-02 17:54:46 +09002068{
2069 unsigned long xfer_mask;
2070 int highbit;
2071
2072 xfer_mask = ata_pack_xfermask(dev->pio_mask, dev->mwdma_mask,
2073 dev->udma_mask);
2074
2075 if (!xfer_mask)
2076 goto fail;
2077 /* don't gear down to MWDMA from UDMA, go directly to PIO */
2078 if (xfer_mask & ATA_MASK_UDMA)
2079 xfer_mask &= ~ATA_MASK_MWDMA;
2080
2081 highbit = fls(xfer_mask) - 1;
2082 xfer_mask &= ~(1 << highbit);
2083 if (force_pio0)
2084 xfer_mask &= 1 << ATA_SHIFT_PIO;
2085 if (!xfer_mask)
2086 goto fail;
2087
2088 ata_unpack_xfermask(xfer_mask, &dev->pio_mask, &dev->mwdma_mask,
2089 &dev->udma_mask);
2090
Tejun Heof15a1da2006-05-15 20:57:56 +09002091 ata_dev_printk(dev, KERN_WARNING, "limiting speed to %s\n",
2092 ata_mode_string(xfer_mask));
Tejun Heocf176e12006-04-02 17:54:46 +09002093
2094 return 0;
2095
2096 fail:
2097 return -EINVAL;
2098}
2099
Tejun Heo3373efd2006-05-15 20:57:53 +09002100static int ata_dev_set_mode(struct ata_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002101{
Tejun Heo83206a22006-03-24 15:25:31 +09002102 unsigned int err_mask;
2103 int rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002104
Tejun Heoe8384602006-04-02 18:51:53 +09002105 dev->flags &= ~ATA_DFLAG_PIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002106 if (dev->xfer_shift == ATA_SHIFT_PIO)
2107 dev->flags |= ATA_DFLAG_PIO;
2108
Tejun Heo3373efd2006-05-15 20:57:53 +09002109 err_mask = ata_dev_set_xfermode(dev);
Tejun Heo83206a22006-03-24 15:25:31 +09002110 if (err_mask) {
Tejun Heof15a1da2006-05-15 20:57:56 +09002111 ata_dev_printk(dev, KERN_ERR, "failed to set xfermode "
2112 "(err_mask=0x%x)\n", err_mask);
Tejun Heo83206a22006-03-24 15:25:31 +09002113 return -EIO;
2114 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002115
Tejun Heo3373efd2006-05-15 20:57:53 +09002116 rc = ata_dev_revalidate(dev, 0);
Tejun Heo5eb45c02006-04-02 18:51:52 +09002117 if (rc)
Tejun Heo83206a22006-03-24 15:25:31 +09002118 return rc;
Tejun Heo48a8a142006-03-05 17:55:58 +09002119
Tejun Heo23e71c32006-03-06 04:31:57 +09002120 DPRINTK("xfer_shift=%u, xfer_mode=0x%x\n",
2121 dev->xfer_shift, (int)dev->xfer_mode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002122
Tejun Heof15a1da2006-05-15 20:57:56 +09002123 ata_dev_printk(dev, KERN_INFO, "configured for %s\n",
2124 ata_mode_string(ata_xfer_mode2mask(dev->xfer_mode)));
Tejun Heo83206a22006-03-24 15:25:31 +09002125 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002126}
2127
Linus Torvalds1da177e2005-04-16 15:20:36 -07002128/**
2129 * ata_set_mode - Program timings and issue SET FEATURES - XFER
2130 * @ap: port on which timings will be programmed
Tejun Heoe82cbdb2006-04-01 01:38:18 +09002131 * @r_failed_dev: out paramter for failed device
Linus Torvalds1da177e2005-04-16 15:20:36 -07002132 *
Tejun Heoe82cbdb2006-04-01 01:38:18 +09002133 * Set ATA device disk transfer mode (PIO3, UDMA6, etc.). If
2134 * ata_set_mode() fails, pointer to the failing device is
2135 * returned in @r_failed_dev.
Jeff Garzik780a87f2005-05-30 15:41:05 -04002136 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07002137 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04002138 * PCI/etc. bus probe sem.
Tejun Heoe82cbdb2006-04-01 01:38:18 +09002139 *
2140 * RETURNS:
2141 * 0 on success, negative errno otherwise
Linus Torvalds1da177e2005-04-16 15:20:36 -07002142 */
Tejun Heo1ad8e7f2006-04-02 18:51:53 +09002143int ata_set_mode(struct ata_port *ap, struct ata_device **r_failed_dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002144{
Tejun Heoe8e06192006-04-01 01:38:18 +09002145 struct ata_device *dev;
Tejun Heoe82cbdb2006-04-01 01:38:18 +09002146 int i, rc = 0, used_dma = 0, found = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002147
Tejun Heo3adcebb2006-05-15 20:57:37 +09002148 /* has private set_mode? */
2149 if (ap->ops->set_mode) {
2150 /* FIXME: make ->set_mode handle no device case and
2151 * return error code and failing device on failure.
2152 */
2153 for (i = 0; i < ATA_MAX_DEVICES; i++) {
Tejun Heo02670bf2006-07-03 16:07:26 +09002154 if (ata_dev_ready(&ap->device[i])) {
Tejun Heo3adcebb2006-05-15 20:57:37 +09002155 ap->ops->set_mode(ap);
2156 break;
2157 }
2158 }
2159 return 0;
2160 }
2161
Tejun Heoa6d5a512006-03-06 04:31:57 +09002162 /* step 1: calculate xfer_mask */
2163 for (i = 0; i < ATA_MAX_DEVICES; i++) {
Tejun Heoacf356b2006-03-24 14:07:50 +09002164 unsigned int pio_mask, dma_mask;
Tejun Heoa6d5a512006-03-06 04:31:57 +09002165
Tejun Heoe8e06192006-04-01 01:38:18 +09002166 dev = &ap->device[i];
2167
Tejun Heoe1211e32006-04-01 01:38:18 +09002168 if (!ata_dev_enabled(dev))
Tejun Heoa6d5a512006-03-06 04:31:57 +09002169 continue;
2170
Tejun Heo3373efd2006-05-15 20:57:53 +09002171 ata_dev_xfermask(dev);
Tejun Heoa6d5a512006-03-06 04:31:57 +09002172
Tejun Heoacf356b2006-03-24 14:07:50 +09002173 pio_mask = ata_pack_xfermask(dev->pio_mask, 0, 0);
2174 dma_mask = ata_pack_xfermask(0, dev->mwdma_mask, dev->udma_mask);
2175 dev->pio_mode = ata_xfer_mask2mode(pio_mask);
2176 dev->dma_mode = ata_xfer_mask2mode(dma_mask);
Alan Cox5444a6f2006-03-27 18:58:20 +01002177
Tejun Heo4f659772006-04-01 01:38:18 +09002178 found = 1;
Alan Cox5444a6f2006-03-27 18:58:20 +01002179 if (dev->dma_mode)
2180 used_dma = 1;
Tejun Heoa6d5a512006-03-06 04:31:57 +09002181 }
Tejun Heo4f659772006-04-01 01:38:18 +09002182 if (!found)
Tejun Heoe82cbdb2006-04-01 01:38:18 +09002183 goto out;
Tejun Heoa6d5a512006-03-06 04:31:57 +09002184
2185 /* step 2: always set host PIO timings */
Tejun Heoe8e06192006-04-01 01:38:18 +09002186 for (i = 0; i < ATA_MAX_DEVICES; i++) {
2187 dev = &ap->device[i];
2188 if (!ata_dev_enabled(dev))
2189 continue;
2190
2191 if (!dev->pio_mode) {
Tejun Heof15a1da2006-05-15 20:57:56 +09002192 ata_dev_printk(dev, KERN_WARNING, "no PIO support\n");
Tejun Heoe8e06192006-04-01 01:38:18 +09002193 rc = -EINVAL;
Tejun Heoe82cbdb2006-04-01 01:38:18 +09002194 goto out;
Tejun Heoe8e06192006-04-01 01:38:18 +09002195 }
2196
2197 dev->xfer_mode = dev->pio_mode;
2198 dev->xfer_shift = ATA_SHIFT_PIO;
2199 if (ap->ops->set_piomode)
2200 ap->ops->set_piomode(ap, dev);
2201 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002202
Tejun Heoa6d5a512006-03-06 04:31:57 +09002203 /* step 3: set host DMA timings */
Tejun Heoe8e06192006-04-01 01:38:18 +09002204 for (i = 0; i < ATA_MAX_DEVICES; i++) {
2205 dev = &ap->device[i];
2206
2207 if (!ata_dev_enabled(dev) || !dev->dma_mode)
2208 continue;
2209
2210 dev->xfer_mode = dev->dma_mode;
2211 dev->xfer_shift = ata_xfer_mode2shift(dev->dma_mode);
2212 if (ap->ops->set_dmamode)
2213 ap->ops->set_dmamode(ap, dev);
2214 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002215
2216 /* step 4: update devices' xfer mode */
Tejun Heo83206a22006-03-24 15:25:31 +09002217 for (i = 0; i < ATA_MAX_DEVICES; i++) {
Tejun Heoe8e06192006-04-01 01:38:18 +09002218 dev = &ap->device[i];
Linus Torvalds1da177e2005-04-16 15:20:36 -07002219
Tejun Heo02670bf2006-07-03 16:07:26 +09002220 /* don't udpate suspended devices' xfer mode */
2221 if (!ata_dev_ready(dev))
Tejun Heo83206a22006-03-24 15:25:31 +09002222 continue;
2223
Tejun Heo3373efd2006-05-15 20:57:53 +09002224 rc = ata_dev_set_mode(dev);
Tejun Heo5bbc53f2006-04-01 01:38:17 +09002225 if (rc)
Tejun Heoe82cbdb2006-04-01 01:38:18 +09002226 goto out;
Tejun Heo83206a22006-03-24 15:25:31 +09002227 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002228
Tejun Heoe8e06192006-04-01 01:38:18 +09002229 /* Record simplex status. If we selected DMA then the other
2230 * host channels are not permitted to do so.
Alan Cox5444a6f2006-03-27 18:58:20 +01002231 */
Alan Cox5444a6f2006-03-27 18:58:20 +01002232 if (used_dma && (ap->host_set->flags & ATA_HOST_SIMPLEX))
2233 ap->host_set->simplex_claimed = 1;
2234
Tejun Heoe8e06192006-04-01 01:38:18 +09002235 /* step5: chip specific finalisation */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002236 if (ap->ops->post_set_mode)
2237 ap->ops->post_set_mode(ap);
2238
Tejun Heoe82cbdb2006-04-01 01:38:18 +09002239 out:
2240 if (rc)
2241 *r_failed_dev = dev;
2242 return rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002243}
2244
2245/**
Jeff Garzik1fdffbc2006-02-09 05:15:27 -05002246 * ata_tf_to_host - issue ATA taskfile to host controller
2247 * @ap: port to which command is being issued
2248 * @tf: ATA taskfile register set
2249 *
2250 * Issues ATA taskfile register set to ATA host controller,
2251 * with proper synchronization with interrupt handler and
2252 * other threads.
2253 *
2254 * LOCKING:
2255 * spin_lock_irqsave(host_set lock)
2256 */
2257
2258static inline void ata_tf_to_host(struct ata_port *ap,
2259 const struct ata_taskfile *tf)
2260{
2261 ap->ops->tf_load(ap, tf);
2262 ap->ops->exec_command(ap, tf);
2263}
2264
2265/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07002266 * ata_busy_sleep - sleep until BSY clears, or timeout
2267 * @ap: port containing status register to be polled
2268 * @tmout_pat: impatience timeout
2269 * @tmout: overall timeout
2270 *
Jeff Garzik780a87f2005-05-30 15:41:05 -04002271 * Sleep until ATA Status register bit BSY clears,
2272 * or a timeout occurs.
2273 *
2274 * LOCKING: None.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002275 */
2276
Tejun Heo6f8b9952006-01-24 17:05:21 +09002277unsigned int ata_busy_sleep (struct ata_port *ap,
2278 unsigned long tmout_pat, unsigned long tmout)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002279{
2280 unsigned long timer_start, timeout;
2281 u8 status;
2282
2283 status = ata_busy_wait(ap, ATA_BUSY, 300);
2284 timer_start = jiffies;
2285 timeout = timer_start + tmout_pat;
2286 while ((status & ATA_BUSY) && (time_before(jiffies, timeout))) {
2287 msleep(50);
2288 status = ata_busy_wait(ap, ATA_BUSY, 3);
2289 }
2290
2291 if (status & ATA_BUSY)
Tejun Heof15a1da2006-05-15 20:57:56 +09002292 ata_port_printk(ap, KERN_WARNING,
2293 "port is slow to respond, please be patient\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07002294
2295 timeout = timer_start + tmout;
2296 while ((status & ATA_BUSY) && (time_before(jiffies, timeout))) {
2297 msleep(50);
2298 status = ata_chk_status(ap);
2299 }
2300
2301 if (status & ATA_BUSY) {
Tejun Heof15a1da2006-05-15 20:57:56 +09002302 ata_port_printk(ap, KERN_ERR, "port failed to respond "
2303 "(%lu secs)\n", tmout / HZ);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002304 return 1;
2305 }
2306
2307 return 0;
2308}
2309
2310static void ata_bus_post_reset(struct ata_port *ap, unsigned int devmask)
2311{
2312 struct ata_ioports *ioaddr = &ap->ioaddr;
2313 unsigned int dev0 = devmask & (1 << 0);
2314 unsigned int dev1 = devmask & (1 << 1);
2315 unsigned long timeout;
2316
2317 /* if device 0 was found in ata_devchk, wait for its
2318 * BSY bit to clear
2319 */
2320 if (dev0)
2321 ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT);
2322
2323 /* if device 1 was found in ata_devchk, wait for
2324 * register access, then wait for BSY to clear
2325 */
2326 timeout = jiffies + ATA_TMOUT_BOOT;
2327 while (dev1) {
2328 u8 nsect, lbal;
2329
2330 ap->ops->dev_select(ap, 1);
2331 if (ap->flags & ATA_FLAG_MMIO) {
2332 nsect = readb((void __iomem *) ioaddr->nsect_addr);
2333 lbal = readb((void __iomem *) ioaddr->lbal_addr);
2334 } else {
2335 nsect = inb(ioaddr->nsect_addr);
2336 lbal = inb(ioaddr->lbal_addr);
2337 }
2338 if ((nsect == 1) && (lbal == 1))
2339 break;
2340 if (time_after(jiffies, timeout)) {
2341 dev1 = 0;
2342 break;
2343 }
2344 msleep(50); /* give drive a breather */
2345 }
2346 if (dev1)
2347 ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT);
2348
2349 /* is all this really necessary? */
2350 ap->ops->dev_select(ap, 0);
2351 if (dev1)
2352 ap->ops->dev_select(ap, 1);
2353 if (dev0)
2354 ap->ops->dev_select(ap, 0);
2355}
2356
Linus Torvalds1da177e2005-04-16 15:20:36 -07002357static unsigned int ata_bus_softreset(struct ata_port *ap,
2358 unsigned int devmask)
2359{
2360 struct ata_ioports *ioaddr = &ap->ioaddr;
2361
2362 DPRINTK("ata%u: bus reset via SRST\n", ap->id);
2363
2364 /* software reset. causes dev0 to be selected */
2365 if (ap->flags & ATA_FLAG_MMIO) {
2366 writeb(ap->ctl, (void __iomem *) ioaddr->ctl_addr);
2367 udelay(20); /* FIXME: flush */
2368 writeb(ap->ctl | ATA_SRST, (void __iomem *) ioaddr->ctl_addr);
2369 udelay(20); /* FIXME: flush */
2370 writeb(ap->ctl, (void __iomem *) ioaddr->ctl_addr);
2371 } else {
2372 outb(ap->ctl, ioaddr->ctl_addr);
2373 udelay(10);
2374 outb(ap->ctl | ATA_SRST, ioaddr->ctl_addr);
2375 udelay(10);
2376 outb(ap->ctl, ioaddr->ctl_addr);
2377 }
2378
2379 /* spec mandates ">= 2ms" before checking status.
2380 * We wait 150ms, because that was the magic delay used for
2381 * ATAPI devices in Hale Landis's ATADRVR, for the period of time
2382 * between when the ATA command register is written, and then
2383 * status is checked. Because waiting for "a while" before
2384 * checking status is fine, post SRST, we perform this magic
2385 * delay here as well.
Alan Cox09c7ad72006-03-22 15:52:40 +00002386 *
2387 * Old drivers/ide uses the 2mS rule and then waits for ready
Linus Torvalds1da177e2005-04-16 15:20:36 -07002388 */
2389 msleep(150);
2390
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05002391 /* Before we perform post reset processing we want to see if
Tejun Heo298a41c2006-03-25 02:58:13 +09002392 * the bus shows 0xFF because the odd clown forgets the D7
2393 * pulldown resistor.
2394 */
Tejun Heo987d2f02006-04-11 22:16:45 +09002395 if (ata_check_status(ap) == 0xFF) {
Tejun Heof15a1da2006-05-15 20:57:56 +09002396 ata_port_printk(ap, KERN_ERR, "SRST failed (status 0xFF)\n");
Tejun Heo298a41c2006-03-25 02:58:13 +09002397 return AC_ERR_OTHER;
Tejun Heo987d2f02006-04-11 22:16:45 +09002398 }
Alan Cox09c7ad72006-03-22 15:52:40 +00002399
Linus Torvalds1da177e2005-04-16 15:20:36 -07002400 ata_bus_post_reset(ap, devmask);
2401
2402 return 0;
2403}
2404
2405/**
2406 * ata_bus_reset - reset host port and associated ATA channel
2407 * @ap: port to reset
2408 *
2409 * This is typically the first time we actually start issuing
2410 * commands to the ATA channel. We wait for BSY to clear, then
2411 * issue EXECUTE DEVICE DIAGNOSTIC command, polling for its
2412 * result. Determine what devices, if any, are on the channel
2413 * by looking at the device 0/1 error register. Look at the signature
2414 * stored in each device's taskfile registers, to determine if
2415 * the device is ATA or ATAPI.
2416 *
2417 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04002418 * PCI/etc. bus probe sem.
2419 * Obtains host_set lock.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002420 *
2421 * SIDE EFFECTS:
Tejun Heo198e0fe2006-04-02 18:51:52 +09002422 * Sets ATA_FLAG_DISABLED if bus reset fails.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002423 */
2424
2425void ata_bus_reset(struct ata_port *ap)
2426{
2427 struct ata_ioports *ioaddr = &ap->ioaddr;
2428 unsigned int slave_possible = ap->flags & ATA_FLAG_SLAVE_POSS;
2429 u8 err;
Tejun Heoaec5c3c2006-03-25 01:33:34 +09002430 unsigned int dev0, dev1 = 0, devmask = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002431
2432 DPRINTK("ENTER, host %u, port %u\n", ap->id, ap->port_no);
2433
2434 /* determine if device 0/1 are present */
2435 if (ap->flags & ATA_FLAG_SATA_RESET)
2436 dev0 = 1;
2437 else {
2438 dev0 = ata_devchk(ap, 0);
2439 if (slave_possible)
2440 dev1 = ata_devchk(ap, 1);
2441 }
2442
2443 if (dev0)
2444 devmask |= (1 << 0);
2445 if (dev1)
2446 devmask |= (1 << 1);
2447
2448 /* select device 0 again */
2449 ap->ops->dev_select(ap, 0);
2450
2451 /* issue bus reset */
2452 if (ap->flags & ATA_FLAG_SRST)
Tejun Heoaec5c3c2006-03-25 01:33:34 +09002453 if (ata_bus_softreset(ap, devmask))
2454 goto err_out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002455
2456 /*
2457 * determine by signature whether we have ATA or ATAPI devices
2458 */
Tejun Heob4dc7622006-01-24 17:05:22 +09002459 ap->device[0].class = ata_dev_try_classify(ap, 0, &err);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002460 if ((slave_possible) && (err != 0x81))
Tejun Heob4dc7622006-01-24 17:05:22 +09002461 ap->device[1].class = ata_dev_try_classify(ap, 1, &err);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002462
2463 /* re-enable interrupts */
2464 if (ap->ioaddr.ctl_addr) /* FIXME: hack. create a hook instead */
2465 ata_irq_on(ap);
2466
2467 /* is double-select really necessary? */
2468 if (ap->device[1].class != ATA_DEV_NONE)
2469 ap->ops->dev_select(ap, 1);
2470 if (ap->device[0].class != ATA_DEV_NONE)
2471 ap->ops->dev_select(ap, 0);
2472
2473 /* if no devices were detected, disable this port */
2474 if ((ap->device[0].class == ATA_DEV_NONE) &&
2475 (ap->device[1].class == ATA_DEV_NONE))
2476 goto err_out;
2477
2478 if (ap->flags & (ATA_FLAG_SATA_RESET | ATA_FLAG_SRST)) {
2479 /* set up device control for ATA_FLAG_SATA_RESET */
2480 if (ap->flags & ATA_FLAG_MMIO)
2481 writeb(ap->ctl, (void __iomem *) ioaddr->ctl_addr);
2482 else
2483 outb(ap->ctl, ioaddr->ctl_addr);
2484 }
2485
2486 DPRINTK("EXIT\n");
2487 return;
2488
2489err_out:
Tejun Heof15a1da2006-05-15 20:57:56 +09002490 ata_port_printk(ap, KERN_ERR, "disabling port\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07002491 ap->ops->port_disable(ap);
2492
2493 DPRINTK("EXIT\n");
2494}
2495
Tejun Heod7bb4cc2006-05-31 18:27:46 +09002496/**
2497 * sata_phy_debounce - debounce SATA phy status
2498 * @ap: ATA port to debounce SATA phy status for
2499 * @params: timing parameters { interval, duratinon, timeout } in msec
2500 *
2501 * Make sure SStatus of @ap reaches stable state, determined by
2502 * holding the same value where DET is not 1 for @duration polled
2503 * every @interval, before @timeout. Timeout constraints the
2504 * beginning of the stable state. Because, after hot unplugging,
2505 * DET gets stuck at 1 on some controllers, this functions waits
2506 * until timeout then returns 0 if DET is stable at 1.
2507 *
2508 * LOCKING:
2509 * Kernel thread context (may sleep)
2510 *
2511 * RETURNS:
2512 * 0 on success, -errno on failure.
2513 */
2514int sata_phy_debounce(struct ata_port *ap, const unsigned long *params)
Tejun Heo7a7921e2006-02-02 18:20:00 +09002515{
Tejun Heod7bb4cc2006-05-31 18:27:46 +09002516 unsigned long interval_msec = params[0];
2517 unsigned long duration = params[1] * HZ / 1000;
2518 unsigned long timeout = jiffies + params[2] * HZ / 1000;
2519 unsigned long last_jiffies;
2520 u32 last, cur;
2521 int rc;
2522
2523 if ((rc = sata_scr_read(ap, SCR_STATUS, &cur)))
2524 return rc;
2525 cur &= 0xf;
2526
2527 last = cur;
2528 last_jiffies = jiffies;
2529
2530 while (1) {
2531 msleep(interval_msec);
2532 if ((rc = sata_scr_read(ap, SCR_STATUS, &cur)))
2533 return rc;
2534 cur &= 0xf;
2535
2536 /* DET stable? */
2537 if (cur == last) {
2538 if (cur == 1 && time_before(jiffies, timeout))
2539 continue;
2540 if (time_after(jiffies, last_jiffies + duration))
2541 return 0;
2542 continue;
2543 }
2544
2545 /* unstable, start over */
2546 last = cur;
2547 last_jiffies = jiffies;
2548
2549 /* check timeout */
2550 if (time_after(jiffies, timeout))
2551 return -EBUSY;
2552 }
2553}
2554
2555/**
2556 * sata_phy_resume - resume SATA phy
2557 * @ap: ATA port to resume SATA phy for
2558 * @params: timing parameters { interval, duratinon, timeout } in msec
2559 *
2560 * Resume SATA phy of @ap and debounce it.
2561 *
2562 * LOCKING:
2563 * Kernel thread context (may sleep)
2564 *
2565 * RETURNS:
2566 * 0 on success, -errno on failure.
2567 */
2568int sata_phy_resume(struct ata_port *ap, const unsigned long *params)
2569{
2570 u32 scontrol;
Tejun Heo81952c52006-05-15 20:57:47 +09002571 int rc;
Tejun Heo7a7921e2006-02-02 18:20:00 +09002572
Tejun Heo81952c52006-05-15 20:57:47 +09002573 if ((rc = sata_scr_read(ap, SCR_CONTROL, &scontrol)))
2574 return rc;
2575
Tejun Heo852ee162006-04-01 01:38:18 +09002576 scontrol = (scontrol & 0x0f0) | 0x300;
Tejun Heo81952c52006-05-15 20:57:47 +09002577
2578 if ((rc = sata_scr_write(ap, SCR_CONTROL, scontrol)))
2579 return rc;
Tejun Heo7a7921e2006-02-02 18:20:00 +09002580
Tejun Heod7bb4cc2006-05-31 18:27:46 +09002581 /* Some PHYs react badly if SStatus is pounded immediately
2582 * after resuming. Delay 200ms before debouncing.
2583 */
2584 msleep(200);
Tejun Heo7a7921e2006-02-02 18:20:00 +09002585
Tejun Heod7bb4cc2006-05-31 18:27:46 +09002586 return sata_phy_debounce(ap, params);
Tejun Heo7a7921e2006-02-02 18:20:00 +09002587}
2588
Tejun Heof5914a42006-05-31 18:27:48 +09002589static void ata_wait_spinup(struct ata_port *ap)
2590{
2591 struct ata_eh_context *ehc = &ap->eh_context;
2592 unsigned long end, secs;
2593 int rc;
2594
2595 /* first, debounce phy if SATA */
2596 if (ap->cbl == ATA_CBL_SATA) {
Tejun Heoe9c83912006-07-03 16:07:26 +09002597 rc = sata_phy_debounce(ap, sata_deb_timing_hotplug);
Tejun Heof5914a42006-05-31 18:27:48 +09002598
2599 /* if debounced successfully and offline, no need to wait */
2600 if ((rc == 0 || rc == -EOPNOTSUPP) && ata_port_offline(ap))
2601 return;
2602 }
2603
2604 /* okay, let's give the drive time to spin up */
2605 end = ehc->i.hotplug_timestamp + ATA_SPINUP_WAIT * HZ / 1000;
2606 secs = ((end - jiffies) + HZ - 1) / HZ;
2607
2608 if (time_after(jiffies, end))
2609 return;
2610
2611 if (secs > 5)
2612 ata_port_printk(ap, KERN_INFO, "waiting for device to spin up "
2613 "(%lu secs)\n", secs);
2614
2615 schedule_timeout_uninterruptible(end - jiffies);
2616}
2617
2618/**
2619 * ata_std_prereset - prepare for reset
2620 * @ap: ATA port to be reset
2621 *
2622 * @ap is about to be reset. Initialize it.
2623 *
2624 * LOCKING:
2625 * Kernel thread context (may sleep)
2626 *
2627 * RETURNS:
2628 * 0 on success, -errno otherwise.
2629 */
2630int ata_std_prereset(struct ata_port *ap)
2631{
2632 struct ata_eh_context *ehc = &ap->eh_context;
Tejun Heoe9c83912006-07-03 16:07:26 +09002633 const unsigned long *timing = sata_ehc_deb_timing(ehc);
Tejun Heof5914a42006-05-31 18:27:48 +09002634 int rc;
2635
Tejun Heo28324302006-07-03 16:07:26 +09002636 /* handle link resume & hotplug spinup */
2637 if ((ehc->i.flags & ATA_EHI_RESUME_LINK) &&
2638 (ap->flags & ATA_FLAG_HRST_TO_RESUME))
2639 ehc->i.action |= ATA_EH_HARDRESET;
2640
2641 if ((ehc->i.flags & ATA_EHI_HOTPLUGGED) &&
2642 (ap->flags & ATA_FLAG_SKIP_D2H_BSY))
2643 ata_wait_spinup(ap);
Tejun Heof5914a42006-05-31 18:27:48 +09002644
2645 /* if we're about to do hardreset, nothing more to do */
2646 if (ehc->i.action & ATA_EH_HARDRESET)
2647 return 0;
2648
2649 /* if SATA, resume phy */
2650 if (ap->cbl == ATA_CBL_SATA) {
Tejun Heof5914a42006-05-31 18:27:48 +09002651 rc = sata_phy_resume(ap, timing);
2652 if (rc && rc != -EOPNOTSUPP) {
2653 /* phy resume failed */
2654 ata_port_printk(ap, KERN_WARNING, "failed to resume "
2655 "link for reset (errno=%d)\n", rc);
2656 return rc;
2657 }
2658 }
2659
2660 /* Wait for !BSY if the controller can wait for the first D2H
2661 * Reg FIS and we don't know that no device is attached.
2662 */
2663 if (!(ap->flags & ATA_FLAG_SKIP_D2H_BSY) && !ata_port_offline(ap))
2664 ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT);
2665
2666 return 0;
2667}
2668
Tejun Heoc2bd5802006-01-24 17:05:22 +09002669/**
2670 * ata_std_softreset - reset host port via ATA SRST
2671 * @ap: port to reset
Tejun Heoc2bd5802006-01-24 17:05:22 +09002672 * @classes: resulting classes of attached devices
2673 *
Tejun Heo52783c52006-05-31 18:28:22 +09002674 * Reset host port using ATA SRST.
Tejun Heoc2bd5802006-01-24 17:05:22 +09002675 *
2676 * LOCKING:
2677 * Kernel thread context (may sleep)
2678 *
2679 * RETURNS:
2680 * 0 on success, -errno otherwise.
2681 */
Tejun Heo2bf2cb22006-04-11 22:16:45 +09002682int ata_std_softreset(struct ata_port *ap, unsigned int *classes)
Tejun Heoc2bd5802006-01-24 17:05:22 +09002683{
2684 unsigned int slave_possible = ap->flags & ATA_FLAG_SLAVE_POSS;
2685 unsigned int devmask = 0, err_mask;
2686 u8 err;
2687
2688 DPRINTK("ENTER\n");
2689
Tejun Heo81952c52006-05-15 20:57:47 +09002690 if (ata_port_offline(ap)) {
Tejun Heo3a397462006-02-10 23:58:48 +09002691 classes[0] = ATA_DEV_NONE;
2692 goto out;
2693 }
2694
Tejun Heoc2bd5802006-01-24 17:05:22 +09002695 /* determine if device 0/1 are present */
2696 if (ata_devchk(ap, 0))
2697 devmask |= (1 << 0);
2698 if (slave_possible && ata_devchk(ap, 1))
2699 devmask |= (1 << 1);
2700
Tejun Heoc2bd5802006-01-24 17:05:22 +09002701 /* select device 0 again */
2702 ap->ops->dev_select(ap, 0);
2703
2704 /* issue bus reset */
2705 DPRINTK("about to softreset, devmask=%x\n", devmask);
2706 err_mask = ata_bus_softreset(ap, devmask);
2707 if (err_mask) {
Tejun Heof15a1da2006-05-15 20:57:56 +09002708 ata_port_printk(ap, KERN_ERR, "SRST failed (err_mask=0x%x)\n",
2709 err_mask);
Tejun Heoc2bd5802006-01-24 17:05:22 +09002710 return -EIO;
2711 }
2712
2713 /* determine by signature whether we have ATA or ATAPI devices */
2714 classes[0] = ata_dev_try_classify(ap, 0, &err);
2715 if (slave_possible && err != 0x81)
2716 classes[1] = ata_dev_try_classify(ap, 1, &err);
2717
Tejun Heo3a397462006-02-10 23:58:48 +09002718 out:
Tejun Heoc2bd5802006-01-24 17:05:22 +09002719 DPRINTK("EXIT, classes[0]=%u [1]=%u\n", classes[0], classes[1]);
2720 return 0;
2721}
2722
2723/**
2724 * sata_std_hardreset - reset host port via SATA phy reset
2725 * @ap: port to reset
Tejun Heoc2bd5802006-01-24 17:05:22 +09002726 * @class: resulting class of attached device
2727 *
2728 * SATA phy-reset host port using DET bits of SControl register.
Tejun Heoc2bd5802006-01-24 17:05:22 +09002729 *
2730 * LOCKING:
2731 * Kernel thread context (may sleep)
2732 *
2733 * RETURNS:
2734 * 0 on success, -errno otherwise.
2735 */
Tejun Heo2bf2cb22006-04-11 22:16:45 +09002736int sata_std_hardreset(struct ata_port *ap, unsigned int *class)
Tejun Heoc2bd5802006-01-24 17:05:22 +09002737{
Tejun Heoe9c83912006-07-03 16:07:26 +09002738 struct ata_eh_context *ehc = &ap->eh_context;
2739 const unsigned long *timing = sata_ehc_deb_timing(ehc);
Tejun Heo852ee162006-04-01 01:38:18 +09002740 u32 scontrol;
Tejun Heo81952c52006-05-15 20:57:47 +09002741 int rc;
Tejun Heo852ee162006-04-01 01:38:18 +09002742
Tejun Heoc2bd5802006-01-24 17:05:22 +09002743 DPRINTK("ENTER\n");
2744
Tejun Heo3c567b72006-05-15 20:57:23 +09002745 if (sata_set_spd_needed(ap)) {
Tejun Heo1c3fae42006-04-02 20:53:28 +09002746 /* SATA spec says nothing about how to reconfigure
2747 * spd. To be on the safe side, turn off phy during
2748 * reconfiguration. This works for at least ICH7 AHCI
2749 * and Sil3124.
2750 */
Tejun Heo81952c52006-05-15 20:57:47 +09002751 if ((rc = sata_scr_read(ap, SCR_CONTROL, &scontrol)))
2752 return rc;
2753
Martin Hicksa34b6fc2006-07-05 15:06:13 -04002754 scontrol = (scontrol & 0x0f0) | 0x304;
Tejun Heo81952c52006-05-15 20:57:47 +09002755
2756 if ((rc = sata_scr_write(ap, SCR_CONTROL, scontrol)))
2757 return rc;
Tejun Heo1c3fae42006-04-02 20:53:28 +09002758
Tejun Heo3c567b72006-05-15 20:57:23 +09002759 sata_set_spd(ap);
Tejun Heo1c3fae42006-04-02 20:53:28 +09002760 }
2761
2762 /* issue phy wake/reset */
Tejun Heo81952c52006-05-15 20:57:47 +09002763 if ((rc = sata_scr_read(ap, SCR_CONTROL, &scontrol)))
2764 return rc;
2765
Tejun Heo852ee162006-04-01 01:38:18 +09002766 scontrol = (scontrol & 0x0f0) | 0x301;
Tejun Heo81952c52006-05-15 20:57:47 +09002767
2768 if ((rc = sata_scr_write_flush(ap, SCR_CONTROL, scontrol)))
2769 return rc;
Tejun Heoc2bd5802006-01-24 17:05:22 +09002770
Tejun Heo1c3fae42006-04-02 20:53:28 +09002771 /* Couldn't find anything in SATA I/II specs, but AHCI-1.1
Tejun Heoc2bd5802006-01-24 17:05:22 +09002772 * 10.4.2 says at least 1 ms.
2773 */
2774 msleep(1);
2775
Tejun Heo1c3fae42006-04-02 20:53:28 +09002776 /* bring phy back */
Tejun Heoe9c83912006-07-03 16:07:26 +09002777 sata_phy_resume(ap, timing);
Tejun Heoc2bd5802006-01-24 17:05:22 +09002778
Tejun Heoc2bd5802006-01-24 17:05:22 +09002779 /* TODO: phy layer with polling, timeouts, etc. */
Tejun Heo81952c52006-05-15 20:57:47 +09002780 if (ata_port_offline(ap)) {
Tejun Heoc2bd5802006-01-24 17:05:22 +09002781 *class = ATA_DEV_NONE;
2782 DPRINTK("EXIT, link offline\n");
2783 return 0;
2784 }
2785
2786 if (ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT)) {
Tejun Heof15a1da2006-05-15 20:57:56 +09002787 ata_port_printk(ap, KERN_ERR,
2788 "COMRESET failed (device not ready)\n");
Tejun Heoc2bd5802006-01-24 17:05:22 +09002789 return -EIO;
2790 }
2791
Tejun Heo3a397462006-02-10 23:58:48 +09002792 ap->ops->dev_select(ap, 0); /* probably unnecessary */
2793
Tejun Heoc2bd5802006-01-24 17:05:22 +09002794 *class = ata_dev_try_classify(ap, 0, NULL);
2795
2796 DPRINTK("EXIT, class=%u\n", *class);
2797 return 0;
2798}
2799
2800/**
2801 * ata_std_postreset - standard postreset callback
2802 * @ap: the target ata_port
2803 * @classes: classes of attached devices
2804 *
2805 * This function is invoked after a successful reset. Note that
2806 * the device might have been reset more than once using
2807 * different reset methods before postreset is invoked.
Tejun Heoc2bd5802006-01-24 17:05:22 +09002808 *
Tejun Heoc2bd5802006-01-24 17:05:22 +09002809 * LOCKING:
2810 * Kernel thread context (may sleep)
2811 */
2812void ata_std_postreset(struct ata_port *ap, unsigned int *classes)
2813{
Tejun Heodc2b3512006-05-15 20:58:00 +09002814 u32 serror;
2815
Tejun Heoc2bd5802006-01-24 17:05:22 +09002816 DPRINTK("ENTER\n");
2817
Tejun Heoc2bd5802006-01-24 17:05:22 +09002818 /* print link status */
Tejun Heo81952c52006-05-15 20:57:47 +09002819 sata_print_link_status(ap);
Tejun Heoc2bd5802006-01-24 17:05:22 +09002820
Tejun Heodc2b3512006-05-15 20:58:00 +09002821 /* clear SError */
2822 if (sata_scr_read(ap, SCR_ERROR, &serror) == 0)
2823 sata_scr_write(ap, SCR_ERROR, serror);
2824
Tejun Heo3a397462006-02-10 23:58:48 +09002825 /* re-enable interrupts */
Tejun Heoe3180492006-05-15 20:58:09 +09002826 if (!ap->ops->error_handler) {
2827 /* FIXME: hack. create a hook instead */
2828 if (ap->ioaddr.ctl_addr)
2829 ata_irq_on(ap);
2830 }
Tejun Heoc2bd5802006-01-24 17:05:22 +09002831
2832 /* is double-select really necessary? */
2833 if (classes[0] != ATA_DEV_NONE)
2834 ap->ops->dev_select(ap, 1);
2835 if (classes[1] != ATA_DEV_NONE)
2836 ap->ops->dev_select(ap, 0);
2837
Tejun Heo3a397462006-02-10 23:58:48 +09002838 /* bail out if no device is present */
2839 if (classes[0] == ATA_DEV_NONE && classes[1] == ATA_DEV_NONE) {
2840 DPRINTK("EXIT, no device\n");
2841 return;
2842 }
2843
2844 /* set up device control */
2845 if (ap->ioaddr.ctl_addr) {
2846 if (ap->flags & ATA_FLAG_MMIO)
2847 writeb(ap->ctl, (void __iomem *) ap->ioaddr.ctl_addr);
2848 else
2849 outb(ap->ctl, ap->ioaddr.ctl_addr);
2850 }
Tejun Heoc2bd5802006-01-24 17:05:22 +09002851
2852 DPRINTK("EXIT\n");
2853}
2854
Tejun Heoa62c0fc2006-01-24 17:05:22 +09002855/**
Tejun Heo623a3122006-03-05 17:55:58 +09002856 * ata_dev_same_device - Determine whether new ID matches configured device
Tejun Heo623a3122006-03-05 17:55:58 +09002857 * @dev: device to compare against
2858 * @new_class: class of the new device
2859 * @new_id: IDENTIFY page of the new device
2860 *
2861 * Compare @new_class and @new_id against @dev and determine
2862 * whether @dev is the device indicated by @new_class and
2863 * @new_id.
2864 *
2865 * LOCKING:
2866 * None.
2867 *
2868 * RETURNS:
2869 * 1 if @dev matches @new_class and @new_id, 0 otherwise.
2870 */
Tejun Heo3373efd2006-05-15 20:57:53 +09002871static int ata_dev_same_device(struct ata_device *dev, unsigned int new_class,
2872 const u16 *new_id)
Tejun Heo623a3122006-03-05 17:55:58 +09002873{
2874 const u16 *old_id = dev->id;
2875 unsigned char model[2][41], serial[2][21];
2876 u64 new_n_sectors;
2877
2878 if (dev->class != new_class) {
Tejun Heof15a1da2006-05-15 20:57:56 +09002879 ata_dev_printk(dev, KERN_INFO, "class mismatch %d != %d\n",
2880 dev->class, new_class);
Tejun Heo623a3122006-03-05 17:55:58 +09002881 return 0;
2882 }
2883
2884 ata_id_c_string(old_id, model[0], ATA_ID_PROD_OFS, sizeof(model[0]));
2885 ata_id_c_string(new_id, model[1], ATA_ID_PROD_OFS, sizeof(model[1]));
2886 ata_id_c_string(old_id, serial[0], ATA_ID_SERNO_OFS, sizeof(serial[0]));
2887 ata_id_c_string(new_id, serial[1], ATA_ID_SERNO_OFS, sizeof(serial[1]));
2888 new_n_sectors = ata_id_n_sectors(new_id);
2889
2890 if (strcmp(model[0], model[1])) {
Tejun Heof15a1da2006-05-15 20:57:56 +09002891 ata_dev_printk(dev, KERN_INFO, "model number mismatch "
2892 "'%s' != '%s'\n", model[0], model[1]);
Tejun Heo623a3122006-03-05 17:55:58 +09002893 return 0;
2894 }
2895
2896 if (strcmp(serial[0], serial[1])) {
Tejun Heof15a1da2006-05-15 20:57:56 +09002897 ata_dev_printk(dev, KERN_INFO, "serial number mismatch "
2898 "'%s' != '%s'\n", serial[0], serial[1]);
Tejun Heo623a3122006-03-05 17:55:58 +09002899 return 0;
2900 }
2901
2902 if (dev->class == ATA_DEV_ATA && dev->n_sectors != new_n_sectors) {
Tejun Heof15a1da2006-05-15 20:57:56 +09002903 ata_dev_printk(dev, KERN_INFO, "n_sectors mismatch "
2904 "%llu != %llu\n",
2905 (unsigned long long)dev->n_sectors,
2906 (unsigned long long)new_n_sectors);
Tejun Heo623a3122006-03-05 17:55:58 +09002907 return 0;
2908 }
2909
2910 return 1;
2911}
2912
2913/**
2914 * ata_dev_revalidate - Revalidate ATA device
Tejun Heo623a3122006-03-05 17:55:58 +09002915 * @dev: device to revalidate
2916 * @post_reset: is this revalidation after reset?
2917 *
2918 * Re-read IDENTIFY page and make sure @dev is still attached to
2919 * the port.
2920 *
2921 * LOCKING:
2922 * Kernel thread context (may sleep)
2923 *
2924 * RETURNS:
2925 * 0 on success, negative errno otherwise
2926 */
Tejun Heo3373efd2006-05-15 20:57:53 +09002927int ata_dev_revalidate(struct ata_device *dev, int post_reset)
Tejun Heo623a3122006-03-05 17:55:58 +09002928{
Tejun Heo5eb45c02006-04-02 18:51:52 +09002929 unsigned int class = dev->class;
Tejun Heof15a1da2006-05-15 20:57:56 +09002930 u16 *id = (void *)dev->ap->sector_buf;
Tejun Heo623a3122006-03-05 17:55:58 +09002931 int rc;
2932
Tejun Heo5eb45c02006-04-02 18:51:52 +09002933 if (!ata_dev_enabled(dev)) {
2934 rc = -ENODEV;
2935 goto fail;
2936 }
Tejun Heo623a3122006-03-05 17:55:58 +09002937
Tejun Heofe635c72006-05-15 20:57:35 +09002938 /* read ID data */
Tejun Heo3373efd2006-05-15 20:57:53 +09002939 rc = ata_dev_read_id(dev, &class, post_reset, id);
Tejun Heo623a3122006-03-05 17:55:58 +09002940 if (rc)
2941 goto fail;
2942
2943 /* is the device still there? */
Tejun Heo3373efd2006-05-15 20:57:53 +09002944 if (!ata_dev_same_device(dev, class, id)) {
Tejun Heo623a3122006-03-05 17:55:58 +09002945 rc = -ENODEV;
2946 goto fail;
2947 }
2948
Tejun Heofe635c72006-05-15 20:57:35 +09002949 memcpy(dev->id, id, sizeof(id[0]) * ATA_ID_WORDS);
Tejun Heo623a3122006-03-05 17:55:58 +09002950
2951 /* configure device according to the new ID */
Tejun Heo3373efd2006-05-15 20:57:53 +09002952 rc = ata_dev_configure(dev, 0);
Tejun Heo5eb45c02006-04-02 18:51:52 +09002953 if (rc == 0)
2954 return 0;
Tejun Heo623a3122006-03-05 17:55:58 +09002955
2956 fail:
Tejun Heof15a1da2006-05-15 20:57:56 +09002957 ata_dev_printk(dev, KERN_ERR, "revalidation failed (errno=%d)\n", rc);
Tejun Heo623a3122006-03-05 17:55:58 +09002958 return rc;
2959}
2960
Arjan van de Ven98ac62d2005-11-28 10:06:23 +01002961static const char * const ata_dma_blacklist [] = {
Alan Coxf4b15fe2006-03-22 15:54:04 +00002962 "WDC AC11000H", NULL,
2963 "WDC AC22100H", NULL,
2964 "WDC AC32500H", NULL,
2965 "WDC AC33100H", NULL,
2966 "WDC AC31600H", NULL,
2967 "WDC AC32100H", "24.09P07",
2968 "WDC AC23200L", "21.10N21",
2969 "Compaq CRD-8241B", NULL,
2970 "CRD-8400B", NULL,
2971 "CRD-8480B", NULL,
2972 "CRD-8482B", NULL,
2973 "CRD-84", NULL,
2974 "SanDisk SDP3B", NULL,
2975 "SanDisk SDP3B-64", NULL,
2976 "SANYO CD-ROM CRD", NULL,
2977 "HITACHI CDR-8", NULL,
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05002978 "HITACHI CDR-8335", NULL,
Alan Coxf4b15fe2006-03-22 15:54:04 +00002979 "HITACHI CDR-8435", NULL,
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05002980 "Toshiba CD-ROM XM-6202B", NULL,
2981 "TOSHIBA CD-ROM XM-1702BC", NULL,
2982 "CD-532E-A", NULL,
2983 "E-IDE CD-ROM CR-840", NULL,
2984 "CD-ROM Drive/F5A", NULL,
2985 "WPI CDD-820", NULL,
Alan Coxf4b15fe2006-03-22 15:54:04 +00002986 "SAMSUNG CD-ROM SC-148C", NULL,
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05002987 "SAMSUNG CD-ROM SC", NULL,
Alan Coxf4b15fe2006-03-22 15:54:04 +00002988 "SanDisk SDP3B-64", NULL,
2989 "ATAPI CD-ROM DRIVE 40X MAXIMUM",NULL,
2990 "_NEC DV5800A", NULL,
2991 "SAMSUNG CD-ROM SN-124", "N001"
Linus Torvalds1da177e2005-04-16 15:20:36 -07002992};
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05002993
Alan Coxf4b15fe2006-03-22 15:54:04 +00002994static int ata_strim(char *s, size_t len)
2995{
2996 len = strnlen(s, len);
2997
2998 /* ATAPI specifies that empty space is blank-filled; remove blanks */
2999 while ((len > 0) && (s[len - 1] == ' ')) {
3000 len--;
3001 s[len] = 0;
3002 }
3003 return len;
3004}
Linus Torvalds1da177e2005-04-16 15:20:36 -07003005
Jeff Garzik057ace52005-10-22 14:27:05 -04003006static int ata_dma_blacklisted(const struct ata_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003007{
Alan Coxf4b15fe2006-03-22 15:54:04 +00003008 unsigned char model_num[40];
3009 unsigned char model_rev[16];
3010 unsigned int nlen, rlen;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003011 int i;
3012
Albert Lee3a778272006-06-22 13:00:25 +08003013 /* We don't support polling DMA.
3014 * DMA blacklist those ATAPI devices with CDB-intr (and use PIO)
3015 * if the LLDD handles only interrupts in the HSM_ST_LAST state.
3016 */
3017 if ((dev->ap->flags & ATA_FLAG_PIO_POLLING) &&
3018 (dev->flags & ATA_DFLAG_CDB_INTR))
3019 return 1;
3020
Alan Coxf4b15fe2006-03-22 15:54:04 +00003021 ata_id_string(dev->id, model_num, ATA_ID_PROD_OFS,
3022 sizeof(model_num));
3023 ata_id_string(dev->id, model_rev, ATA_ID_FW_REV_OFS,
3024 sizeof(model_rev));
3025 nlen = ata_strim(model_num, sizeof(model_num));
3026 rlen = ata_strim(model_rev, sizeof(model_rev));
Linus Torvalds1da177e2005-04-16 15:20:36 -07003027
Alan Coxf4b15fe2006-03-22 15:54:04 +00003028 for (i = 0; i < ARRAY_SIZE(ata_dma_blacklist); i += 2) {
3029 if (!strncmp(ata_dma_blacklist[i], model_num, nlen)) {
3030 if (ata_dma_blacklist[i+1] == NULL)
3031 return 1;
3032 if (!strncmp(ata_dma_blacklist[i], model_rev, rlen))
3033 return 1;
3034 }
3035 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003036 return 0;
3037}
3038
Tejun Heoa6d5a512006-03-06 04:31:57 +09003039/**
3040 * ata_dev_xfermask - Compute supported xfermask of the given device
Tejun Heoa6d5a512006-03-06 04:31:57 +09003041 * @dev: Device to compute xfermask for
3042 *
Tejun Heoacf356b2006-03-24 14:07:50 +09003043 * Compute supported xfermask of @dev and store it in
3044 * dev->*_mask. This function is responsible for applying all
3045 * known limits including host controller limits, device
3046 * blacklist, etc...
Tejun Heoa6d5a512006-03-06 04:31:57 +09003047 *
Tejun Heo600511e2006-03-25 11:14:07 +09003048 * FIXME: The current implementation limits all transfer modes to
3049 * the fastest of the lowested device on the port. This is not
Tejun Heo05c8e0a2006-03-25 14:28:57 +09003050 * required on most controllers.
Tejun Heo600511e2006-03-25 11:14:07 +09003051 *
Tejun Heoa6d5a512006-03-06 04:31:57 +09003052 * LOCKING:
3053 * None.
Tejun Heoa6d5a512006-03-06 04:31:57 +09003054 */
Tejun Heo3373efd2006-05-15 20:57:53 +09003055static void ata_dev_xfermask(struct ata_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003056{
Tejun Heo3373efd2006-05-15 20:57:53 +09003057 struct ata_port *ap = dev->ap;
Alan Cox5444a6f2006-03-27 18:58:20 +01003058 struct ata_host_set *hs = ap->host_set;
Tejun Heoa6d5a512006-03-06 04:31:57 +09003059 unsigned long xfer_mask;
3060 int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003061
Tejun Heo565083e2006-04-02 17:54:47 +09003062 xfer_mask = ata_pack_xfermask(ap->pio_mask,
3063 ap->mwdma_mask, ap->udma_mask);
3064
3065 /* Apply cable rule here. Don't apply it early because when
3066 * we handle hot plug the cable type can itself change.
3067 */
3068 if (ap->cbl == ATA_CBL_PATA40)
3069 xfer_mask &= ~(0xF8 << ATA_SHIFT_UDMA);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003070
Alan Cox5444a6f2006-03-27 18:58:20 +01003071 /* FIXME: Use port-wide xfermask for now */
Tejun Heoa6d5a512006-03-06 04:31:57 +09003072 for (i = 0; i < ATA_MAX_DEVICES; i++) {
3073 struct ata_device *d = &ap->device[i];
Tejun Heo565083e2006-04-02 17:54:47 +09003074
3075 if (ata_dev_absent(d))
Tejun Heoa6d5a512006-03-06 04:31:57 +09003076 continue;
Tejun Heo565083e2006-04-02 17:54:47 +09003077
3078 if (ata_dev_disabled(d)) {
3079 /* to avoid violating device selection timing */
3080 xfer_mask &= ata_pack_xfermask(d->pio_mask,
3081 UINT_MAX, UINT_MAX);
3082 continue;
3083 }
3084
3085 xfer_mask &= ata_pack_xfermask(d->pio_mask,
3086 d->mwdma_mask, d->udma_mask);
Tejun Heoa6d5a512006-03-06 04:31:57 +09003087 xfer_mask &= ata_id_xfermask(d->id);
3088 if (ata_dma_blacklisted(d))
3089 xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003090 }
3091
Tejun Heoa6d5a512006-03-06 04:31:57 +09003092 if (ata_dma_blacklisted(dev))
Tejun Heof15a1da2006-05-15 20:57:56 +09003093 ata_dev_printk(dev, KERN_WARNING,
3094 "device is on DMA blacklist, disabling DMA\n");
Tejun Heoa6d5a512006-03-06 04:31:57 +09003095
Alan Cox5444a6f2006-03-27 18:58:20 +01003096 if (hs->flags & ATA_HOST_SIMPLEX) {
3097 if (hs->simplex_claimed)
3098 xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA);
3099 }
Tejun Heo565083e2006-04-02 17:54:47 +09003100
Alan Cox5444a6f2006-03-27 18:58:20 +01003101 if (ap->ops->mode_filter)
3102 xfer_mask = ap->ops->mode_filter(ap, dev, xfer_mask);
3103
Tejun Heo565083e2006-04-02 17:54:47 +09003104 ata_unpack_xfermask(xfer_mask, &dev->pio_mask,
3105 &dev->mwdma_mask, &dev->udma_mask);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003106}
3107
Linus Torvalds1da177e2005-04-16 15:20:36 -07003108/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07003109 * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command
Linus Torvalds1da177e2005-04-16 15:20:36 -07003110 * @dev: Device to which command will be sent
3111 *
Jeff Garzik780a87f2005-05-30 15:41:05 -04003112 * Issue SET FEATURES - XFER MODE command to device @dev
3113 * on port @ap.
3114 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07003115 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04003116 * PCI/etc. bus probe sem.
Tejun Heo83206a22006-03-24 15:25:31 +09003117 *
3118 * RETURNS:
3119 * 0 on success, AC_ERR_* mask otherwise.
Linus Torvalds1da177e2005-04-16 15:20:36 -07003120 */
3121
Tejun Heo3373efd2006-05-15 20:57:53 +09003122static unsigned int ata_dev_set_xfermode(struct ata_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003123{
Tejun Heoa0123702005-12-13 14:49:31 +09003124 struct ata_taskfile tf;
Tejun Heo83206a22006-03-24 15:25:31 +09003125 unsigned int err_mask;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003126
3127 /* set up set-features taskfile */
3128 DPRINTK("set features - xfer mode\n");
3129
Tejun Heo3373efd2006-05-15 20:57:53 +09003130 ata_tf_init(dev, &tf);
Tejun Heoa0123702005-12-13 14:49:31 +09003131 tf.command = ATA_CMD_SET_FEATURES;
3132 tf.feature = SETFEATURES_XFER;
3133 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
3134 tf.protocol = ATA_PROT_NODATA;
3135 tf.nsect = dev->xfer_mode;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003136
Tejun Heo3373efd2006-05-15 20:57:53 +09003137 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003138
Tejun Heo83206a22006-03-24 15:25:31 +09003139 DPRINTK("EXIT, err_mask=%x\n", err_mask);
3140 return err_mask;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003141}
3142
3143/**
Albert Lee8bf62ece2005-05-12 15:29:42 -04003144 * ata_dev_init_params - Issue INIT DEV PARAMS command
Albert Lee8bf62ece2005-05-12 15:29:42 -04003145 * @dev: Device to which command will be sent
Randy Dunlape2a7f772006-05-18 10:50:18 -07003146 * @heads: Number of heads (taskfile parameter)
3147 * @sectors: Number of sectors (taskfile parameter)
Albert Lee8bf62ece2005-05-12 15:29:42 -04003148 *
3149 * LOCKING:
Tejun Heo6aff8f12006-02-15 18:24:09 +09003150 * Kernel thread context (may sleep)
3151 *
3152 * RETURNS:
3153 * 0 on success, AC_ERR_* mask otherwise.
Albert Lee8bf62ece2005-05-12 15:29:42 -04003154 */
Tejun Heo3373efd2006-05-15 20:57:53 +09003155static unsigned int ata_dev_init_params(struct ata_device *dev,
3156 u16 heads, u16 sectors)
Albert Lee8bf62ece2005-05-12 15:29:42 -04003157{
Tejun Heoa0123702005-12-13 14:49:31 +09003158 struct ata_taskfile tf;
Tejun Heo6aff8f12006-02-15 18:24:09 +09003159 unsigned int err_mask;
Albert Lee8bf62ece2005-05-12 15:29:42 -04003160
3161 /* Number of sectors per track 1-255. Number of heads 1-16 */
3162 if (sectors < 1 || sectors > 255 || heads < 1 || heads > 16)
Albert Lee00b6f5e2006-03-27 16:39:18 +08003163 return AC_ERR_INVALID;
Albert Lee8bf62ece2005-05-12 15:29:42 -04003164
3165 /* set up init dev params taskfile */
3166 DPRINTK("init dev params \n");
3167
Tejun Heo3373efd2006-05-15 20:57:53 +09003168 ata_tf_init(dev, &tf);
Tejun Heoa0123702005-12-13 14:49:31 +09003169 tf.command = ATA_CMD_INIT_DEV_PARAMS;
3170 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
3171 tf.protocol = ATA_PROT_NODATA;
3172 tf.nsect = sectors;
3173 tf.device |= (heads - 1) & 0x0f; /* max head = num. of heads - 1 */
Albert Lee8bf62ece2005-05-12 15:29:42 -04003174
Tejun Heo3373efd2006-05-15 20:57:53 +09003175 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0);
Albert Lee8bf62ece2005-05-12 15:29:42 -04003176
Tejun Heo6aff8f12006-02-15 18:24:09 +09003177 DPRINTK("EXIT, err_mask=%x\n", err_mask);
3178 return err_mask;
Albert Lee8bf62ece2005-05-12 15:29:42 -04003179}
3180
3181/**
Jeff Garzik0cba6322005-05-30 19:49:12 -04003182 * ata_sg_clean - Unmap DMA memory associated with command
3183 * @qc: Command containing DMA memory to be released
3184 *
3185 * Unmap all mapped DMA memory associated with this command.
Linus Torvalds1da177e2005-04-16 15:20:36 -07003186 *
3187 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04003188 * spin_lock_irqsave(host_set lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003189 */
3190
3191static void ata_sg_clean(struct ata_queued_cmd *qc)
3192{
3193 struct ata_port *ap = qc->ap;
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003194 struct scatterlist *sg = qc->__sg;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003195 int dir = qc->dma_dir;
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003196 void *pad_buf = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003197
Tejun Heoa46314742006-02-11 19:11:13 +09003198 WARN_ON(!(qc->flags & ATA_QCFLAG_DMAMAP));
3199 WARN_ON(sg == NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003200
3201 if (qc->flags & ATA_QCFLAG_SINGLE)
Jeff Garzikf1318832006-02-20 16:55:56 -05003202 WARN_ON(qc->n_elem > 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003203
Jeff Garzik2c13b7c2005-11-14 14:14:16 -05003204 VPRINTK("unmapping %u sg elements\n", qc->n_elem);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003205
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003206 /* if we padded the buffer out to 32-bit bound, and data
3207 * xfer direction is from-device, we must copy from the
3208 * pad buffer back into the supplied buffer
3209 */
3210 if (qc->pad_len && !(qc->tf.flags & ATA_TFLAG_WRITE))
3211 pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ);
3212
3213 if (qc->flags & ATA_QCFLAG_SG) {
Jeff Garzike1410f22005-11-14 14:06:26 -05003214 if (qc->n_elem)
Brian King2f1f6102006-03-23 17:30:15 -06003215 dma_unmap_sg(ap->dev, sg, qc->n_elem, dir);
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003216 /* restore last sg */
3217 sg[qc->orig_n_elem - 1].length += qc->pad_len;
3218 if (pad_buf) {
3219 struct scatterlist *psg = &qc->pad_sgent;
3220 void *addr = kmap_atomic(psg->page, KM_IRQ0);
3221 memcpy(addr + psg->offset, pad_buf, qc->pad_len);
Mark Lorddfa15982005-12-12 23:19:28 -05003222 kunmap_atomic(addr, KM_IRQ0);
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003223 }
3224 } else {
Tejun Heo2e242fa2006-02-20 23:48:38 +09003225 if (qc->n_elem)
Brian King2f1f6102006-03-23 17:30:15 -06003226 dma_unmap_single(ap->dev,
Jeff Garzike1410f22005-11-14 14:06:26 -05003227 sg_dma_address(&sg[0]), sg_dma_len(&sg[0]),
3228 dir);
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003229 /* restore sg */
3230 sg->length += qc->pad_len;
3231 if (pad_buf)
3232 memcpy(qc->buf_virt + sg->length - qc->pad_len,
3233 pad_buf, qc->pad_len);
3234 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003235
3236 qc->flags &= ~ATA_QCFLAG_DMAMAP;
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003237 qc->__sg = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003238}
3239
3240/**
3241 * ata_fill_sg - Fill PCI IDE PRD table
3242 * @qc: Metadata associated with taskfile to be transferred
3243 *
Jeff Garzik780a87f2005-05-30 15:41:05 -04003244 * Fill PCI IDE PRD (scatter-gather) table with segments
3245 * associated with the current disk command.
3246 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07003247 * LOCKING:
Jeff Garzik780a87f2005-05-30 15:41:05 -04003248 * spin_lock_irqsave(host_set lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003249 *
3250 */
3251static void ata_fill_sg(struct ata_queued_cmd *qc)
3252{
Linus Torvalds1da177e2005-04-16 15:20:36 -07003253 struct ata_port *ap = qc->ap;
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003254 struct scatterlist *sg;
3255 unsigned int idx;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003256
Tejun Heoa46314742006-02-11 19:11:13 +09003257 WARN_ON(qc->__sg == NULL);
Jeff Garzikf1318832006-02-20 16:55:56 -05003258 WARN_ON(qc->n_elem == 0 && qc->pad_len == 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003259
3260 idx = 0;
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003261 ata_for_each_sg(sg, qc) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003262 u32 addr, offset;
3263 u32 sg_len, len;
3264
3265 /* determine if physical DMA addr spans 64K boundary.
3266 * Note h/w doesn't support 64-bit, so we unconditionally
3267 * truncate dma_addr_t to u32.
3268 */
3269 addr = (u32) sg_dma_address(sg);
3270 sg_len = sg_dma_len(sg);
3271
3272 while (sg_len) {
3273 offset = addr & 0xffff;
3274 len = sg_len;
3275 if ((offset + sg_len) > 0x10000)
3276 len = 0x10000 - offset;
3277
3278 ap->prd[idx].addr = cpu_to_le32(addr);
3279 ap->prd[idx].flags_len = cpu_to_le32(len & 0xffff);
3280 VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", idx, addr, len);
3281
3282 idx++;
3283 sg_len -= len;
3284 addr += len;
3285 }
3286 }
3287
3288 if (idx)
3289 ap->prd[idx - 1].flags_len |= cpu_to_le32(ATA_PRD_EOT);
3290}
3291/**
3292 * ata_check_atapi_dma - Check whether ATAPI DMA can be supported
3293 * @qc: Metadata associated with taskfile to check
3294 *
Jeff Garzik780a87f2005-05-30 15:41:05 -04003295 * Allow low-level driver to filter ATA PACKET commands, returning
3296 * a status indicating whether or not it is OK to use DMA for the
3297 * supplied PACKET command.
3298 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07003299 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04003300 * spin_lock_irqsave(host_set lock)
3301 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07003302 * RETURNS: 0 when ATAPI DMA can be used
3303 * nonzero otherwise
3304 */
3305int ata_check_atapi_dma(struct ata_queued_cmd *qc)
3306{
3307 struct ata_port *ap = qc->ap;
3308 int rc = 0; /* Assume ATAPI DMA is OK by default */
3309
3310 if (ap->ops->check_atapi_dma)
3311 rc = ap->ops->check_atapi_dma(qc);
3312
3313 return rc;
3314}
3315/**
3316 * ata_qc_prep - Prepare taskfile for submission
3317 * @qc: Metadata associated with taskfile to be prepared
3318 *
Jeff Garzik780a87f2005-05-30 15:41:05 -04003319 * Prepare ATA taskfile for submission.
3320 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07003321 * LOCKING:
3322 * spin_lock_irqsave(host_set lock)
3323 */
3324void ata_qc_prep(struct ata_queued_cmd *qc)
3325{
3326 if (!(qc->flags & ATA_QCFLAG_DMAMAP))
3327 return;
3328
3329 ata_fill_sg(qc);
3330}
3331
Brian Kinge46834c2006-03-17 17:04:03 -06003332void ata_noop_qc_prep(struct ata_queued_cmd *qc) { }
3333
Jeff Garzik0cba6322005-05-30 19:49:12 -04003334/**
3335 * ata_sg_init_one - Associate command with memory buffer
3336 * @qc: Command to be associated
3337 * @buf: Memory buffer
3338 * @buflen: Length of memory buffer, in bytes.
3339 *
3340 * Initialize the data-related elements of queued_cmd @qc
3341 * to point to a single memory buffer, @buf of byte length @buflen.
3342 *
3343 * LOCKING:
3344 * spin_lock_irqsave(host_set lock)
3345 */
3346
Linus Torvalds1da177e2005-04-16 15:20:36 -07003347void ata_sg_init_one(struct ata_queued_cmd *qc, void *buf, unsigned int buflen)
3348{
3349 struct scatterlist *sg;
3350
3351 qc->flags |= ATA_QCFLAG_SINGLE;
3352
3353 memset(&qc->sgent, 0, sizeof(qc->sgent));
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003354 qc->__sg = &qc->sgent;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003355 qc->n_elem = 1;
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003356 qc->orig_n_elem = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003357 qc->buf_virt = buf;
Brian King233277c2006-06-07 11:25:31 -05003358 qc->nbytes = buflen;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003359
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003360 sg = qc->__sg;
Jeff Garzikf0612bb2005-10-30 01:58:18 -05003361 sg_init_one(sg, buf, buflen);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003362}
3363
Jeff Garzik0cba6322005-05-30 19:49:12 -04003364/**
3365 * ata_sg_init - Associate command with scatter-gather table.
3366 * @qc: Command to be associated
3367 * @sg: Scatter-gather table.
3368 * @n_elem: Number of elements in s/g table.
3369 *
3370 * Initialize the data-related elements of queued_cmd @qc
3371 * to point to a scatter-gather table @sg, containing @n_elem
3372 * elements.
3373 *
3374 * LOCKING:
3375 * spin_lock_irqsave(host_set lock)
3376 */
3377
Linus Torvalds1da177e2005-04-16 15:20:36 -07003378void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
3379 unsigned int n_elem)
3380{
3381 qc->flags |= ATA_QCFLAG_SG;
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003382 qc->__sg = sg;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003383 qc->n_elem = n_elem;
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003384 qc->orig_n_elem = n_elem;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003385}
3386
3387/**
Jeff Garzik0cba6322005-05-30 19:49:12 -04003388 * ata_sg_setup_one - DMA-map the memory buffer associated with a command.
3389 * @qc: Command with memory buffer to be mapped.
3390 *
3391 * DMA-map the memory buffer associated with queued_cmd @qc.
Linus Torvalds1da177e2005-04-16 15:20:36 -07003392 *
3393 * LOCKING:
3394 * spin_lock_irqsave(host_set lock)
3395 *
3396 * RETURNS:
Jeff Garzik0cba6322005-05-30 19:49:12 -04003397 * Zero on success, negative on error.
Linus Torvalds1da177e2005-04-16 15:20:36 -07003398 */
3399
3400static int ata_sg_setup_one(struct ata_queued_cmd *qc)
3401{
3402 struct ata_port *ap = qc->ap;
3403 int dir = qc->dma_dir;
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003404 struct scatterlist *sg = qc->__sg;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003405 dma_addr_t dma_address;
Tejun Heo2e242fa2006-02-20 23:48:38 +09003406 int trim_sg = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003407
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003408 /* we must lengthen transfers to end on a 32-bit boundary */
3409 qc->pad_len = sg->length & 3;
3410 if (qc->pad_len) {
3411 void *pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ);
3412 struct scatterlist *psg = &qc->pad_sgent;
3413
Tejun Heoa46314742006-02-11 19:11:13 +09003414 WARN_ON(qc->dev->class != ATA_DEV_ATAPI);
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003415
3416 memset(pad_buf, 0, ATA_DMA_PAD_SZ);
3417
3418 if (qc->tf.flags & ATA_TFLAG_WRITE)
3419 memcpy(pad_buf, qc->buf_virt + sg->length - qc->pad_len,
3420 qc->pad_len);
3421
3422 sg_dma_address(psg) = ap->pad_dma + (qc->tag * ATA_DMA_PAD_SZ);
3423 sg_dma_len(psg) = ATA_DMA_PAD_SZ;
3424 /* trim sg */
3425 sg->length -= qc->pad_len;
Tejun Heo2e242fa2006-02-20 23:48:38 +09003426 if (sg->length == 0)
3427 trim_sg = 1;
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003428
3429 DPRINTK("padding done, sg->length=%u pad_len=%u\n",
3430 sg->length, qc->pad_len);
3431 }
3432
Tejun Heo2e242fa2006-02-20 23:48:38 +09003433 if (trim_sg) {
3434 qc->n_elem--;
Jeff Garzike1410f22005-11-14 14:06:26 -05003435 goto skip_map;
3436 }
3437
Brian King2f1f6102006-03-23 17:30:15 -06003438 dma_address = dma_map_single(ap->dev, qc->buf_virt,
Albert Lee32529e02005-05-26 03:49:42 -04003439 sg->length, dir);
Tejun Heo537a95d2005-11-05 14:29:01 -05003440 if (dma_mapping_error(dma_address)) {
3441 /* restore sg */
3442 sg->length += qc->pad_len;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003443 return -1;
Tejun Heo537a95d2005-11-05 14:29:01 -05003444 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003445
3446 sg_dma_address(sg) = dma_address;
Albert Lee32529e02005-05-26 03:49:42 -04003447 sg_dma_len(sg) = sg->length;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003448
Tejun Heo2e242fa2006-02-20 23:48:38 +09003449skip_map:
Linus Torvalds1da177e2005-04-16 15:20:36 -07003450 DPRINTK("mapped buffer of %d bytes for %s\n", sg_dma_len(sg),
3451 qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read");
3452
3453 return 0;
3454}
3455
3456/**
Jeff Garzik0cba6322005-05-30 19:49:12 -04003457 * ata_sg_setup - DMA-map the scatter-gather table associated with a command.
3458 * @qc: Command with scatter-gather table to be mapped.
3459 *
3460 * DMA-map the scatter-gather table associated with queued_cmd @qc.
Linus Torvalds1da177e2005-04-16 15:20:36 -07003461 *
3462 * LOCKING:
3463 * spin_lock_irqsave(host_set lock)
3464 *
3465 * RETURNS:
Jeff Garzik0cba6322005-05-30 19:49:12 -04003466 * Zero on success, negative on error.
Linus Torvalds1da177e2005-04-16 15:20:36 -07003467 *
3468 */
3469
3470static int ata_sg_setup(struct ata_queued_cmd *qc)
3471{
3472 struct ata_port *ap = qc->ap;
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003473 struct scatterlist *sg = qc->__sg;
3474 struct scatterlist *lsg = &sg[qc->n_elem - 1];
Jeff Garzike1410f22005-11-14 14:06:26 -05003475 int n_elem, pre_n_elem, dir, trim_sg = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003476
3477 VPRINTK("ENTER, ata%u\n", ap->id);
Tejun Heoa46314742006-02-11 19:11:13 +09003478 WARN_ON(!(qc->flags & ATA_QCFLAG_SG));
Linus Torvalds1da177e2005-04-16 15:20:36 -07003479
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003480 /* we must lengthen transfers to end on a 32-bit boundary */
3481 qc->pad_len = lsg->length & 3;
3482 if (qc->pad_len) {
3483 void *pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ);
3484 struct scatterlist *psg = &qc->pad_sgent;
3485 unsigned int offset;
3486
Tejun Heoa46314742006-02-11 19:11:13 +09003487 WARN_ON(qc->dev->class != ATA_DEV_ATAPI);
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003488
3489 memset(pad_buf, 0, ATA_DMA_PAD_SZ);
3490
3491 /*
3492 * psg->page/offset are used to copy to-be-written
3493 * data in this function or read data in ata_sg_clean.
3494 */
3495 offset = lsg->offset + lsg->length - qc->pad_len;
3496 psg->page = nth_page(lsg->page, offset >> PAGE_SHIFT);
3497 psg->offset = offset_in_page(offset);
3498
3499 if (qc->tf.flags & ATA_TFLAG_WRITE) {
3500 void *addr = kmap_atomic(psg->page, KM_IRQ0);
3501 memcpy(pad_buf, addr + psg->offset, qc->pad_len);
Mark Lorddfa15982005-12-12 23:19:28 -05003502 kunmap_atomic(addr, KM_IRQ0);
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003503 }
3504
3505 sg_dma_address(psg) = ap->pad_dma + (qc->tag * ATA_DMA_PAD_SZ);
3506 sg_dma_len(psg) = ATA_DMA_PAD_SZ;
3507 /* trim last sg */
3508 lsg->length -= qc->pad_len;
Jeff Garzike1410f22005-11-14 14:06:26 -05003509 if (lsg->length == 0)
3510 trim_sg = 1;
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003511
3512 DPRINTK("padding done, sg[%d].length=%u pad_len=%u\n",
3513 qc->n_elem - 1, lsg->length, qc->pad_len);
3514 }
3515
Jeff Garzike1410f22005-11-14 14:06:26 -05003516 pre_n_elem = qc->n_elem;
3517 if (trim_sg && pre_n_elem)
3518 pre_n_elem--;
3519
3520 if (!pre_n_elem) {
3521 n_elem = 0;
3522 goto skip_map;
3523 }
3524
Linus Torvalds1da177e2005-04-16 15:20:36 -07003525 dir = qc->dma_dir;
Brian King2f1f6102006-03-23 17:30:15 -06003526 n_elem = dma_map_sg(ap->dev, sg, pre_n_elem, dir);
Tejun Heo537a95d2005-11-05 14:29:01 -05003527 if (n_elem < 1) {
3528 /* restore last sg */
3529 lsg->length += qc->pad_len;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003530 return -1;
Tejun Heo537a95d2005-11-05 14:29:01 -05003531 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003532
3533 DPRINTK("%d sg elements mapped\n", n_elem);
3534
Jeff Garzike1410f22005-11-14 14:06:26 -05003535skip_map:
Linus Torvalds1da177e2005-04-16 15:20:36 -07003536 qc->n_elem = n_elem;
3537
3538 return 0;
3539}
3540
3541/**
Randy Dunlapc893a3a2006-01-28 13:15:32 -05003542 * swap_buf_le16 - swap halves of 16-bit words in place
Edward Falk0baab862005-06-02 18:17:13 -04003543 * @buf: Buffer to swap
3544 * @buf_words: Number of 16-bit words in buffer.
3545 *
3546 * Swap halves of 16-bit words if needed to convert from
3547 * little-endian byte order to native cpu byte order, or
3548 * vice-versa.
3549 *
3550 * LOCKING:
Randy Dunlap6f0ef4f2005-10-25 01:44:30 -04003551 * Inherited from caller.
Edward Falk0baab862005-06-02 18:17:13 -04003552 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003553void swap_buf_le16(u16 *buf, unsigned int buf_words)
3554{
3555#ifdef __BIG_ENDIAN
3556 unsigned int i;
3557
3558 for (i = 0; i < buf_words; i++)
3559 buf[i] = le16_to_cpu(buf[i]);
3560#endif /* __BIG_ENDIAN */
3561}
3562
Albert Lee6ae4cfb2005-08-12 14:15:34 +08003563/**
3564 * ata_mmio_data_xfer - Transfer data by MMIO
Jeff Garzikbf717b112006-06-13 20:27:03 -04003565 * @adev: device for this I/O
Albert Lee6ae4cfb2005-08-12 14:15:34 +08003566 * @buf: data buffer
3567 * @buflen: buffer length
Jeff Garzik344baba2005-09-07 01:15:17 -04003568 * @write_data: read/write
Albert Lee6ae4cfb2005-08-12 14:15:34 +08003569 *
3570 * Transfer data from/to the device data register by MMIO.
3571 *
3572 * LOCKING:
3573 * Inherited from caller.
Albert Lee6ae4cfb2005-08-12 14:15:34 +08003574 */
3575
Tejun Heo88574552006-06-25 20:00:35 +09003576void ata_mmio_data_xfer(struct ata_device *adev, unsigned char *buf,
Alan Coxa6b2c5d2006-05-22 16:59:59 +01003577 unsigned int buflen, int write_data)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003578{
Alan Coxa6b2c5d2006-05-22 16:59:59 +01003579 struct ata_port *ap = adev->ap;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003580 unsigned int i;
3581 unsigned int words = buflen >> 1;
3582 u16 *buf16 = (u16 *) buf;
3583 void __iomem *mmio = (void __iomem *)ap->ioaddr.data_addr;
3584
Albert Lee6ae4cfb2005-08-12 14:15:34 +08003585 /* Transfer multiple of 2 bytes */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003586 if (write_data) {
3587 for (i = 0; i < words; i++)
3588 writew(le16_to_cpu(buf16[i]), mmio);
3589 } else {
3590 for (i = 0; i < words; i++)
3591 buf16[i] = cpu_to_le16(readw(mmio));
3592 }
Albert Lee6ae4cfb2005-08-12 14:15:34 +08003593
3594 /* Transfer trailing 1 byte, if any. */
3595 if (unlikely(buflen & 0x01)) {
3596 u16 align_buf[1] = { 0 };
3597 unsigned char *trailing_buf = buf + buflen - 1;
3598
3599 if (write_data) {
3600 memcpy(align_buf, trailing_buf, 1);
3601 writew(le16_to_cpu(align_buf[0]), mmio);
3602 } else {
3603 align_buf[0] = cpu_to_le16(readw(mmio));
3604 memcpy(trailing_buf, align_buf, 1);
3605 }
3606 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003607}
3608
Albert Lee6ae4cfb2005-08-12 14:15:34 +08003609/**
3610 * ata_pio_data_xfer - Transfer data by PIO
Alan Coxa6b2c5d2006-05-22 16:59:59 +01003611 * @adev: device to target
Albert Lee6ae4cfb2005-08-12 14:15:34 +08003612 * @buf: data buffer
3613 * @buflen: buffer length
Jeff Garzik344baba2005-09-07 01:15:17 -04003614 * @write_data: read/write
Albert Lee6ae4cfb2005-08-12 14:15:34 +08003615 *
3616 * Transfer data from/to the device data register by PIO.
3617 *
3618 * LOCKING:
3619 * Inherited from caller.
Albert Lee6ae4cfb2005-08-12 14:15:34 +08003620 */
3621
Tejun Heo88574552006-06-25 20:00:35 +09003622void ata_pio_data_xfer(struct ata_device *adev, unsigned char *buf,
Alan Coxa6b2c5d2006-05-22 16:59:59 +01003623 unsigned int buflen, int write_data)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003624{
Alan Coxa6b2c5d2006-05-22 16:59:59 +01003625 struct ata_port *ap = adev->ap;
Albert Lee6ae4cfb2005-08-12 14:15:34 +08003626 unsigned int words = buflen >> 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003627
Albert Lee6ae4cfb2005-08-12 14:15:34 +08003628 /* Transfer multiple of 2 bytes */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003629 if (write_data)
Albert Lee6ae4cfb2005-08-12 14:15:34 +08003630 outsw(ap->ioaddr.data_addr, buf, words);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003631 else
Albert Lee6ae4cfb2005-08-12 14:15:34 +08003632 insw(ap->ioaddr.data_addr, buf, words);
3633
3634 /* Transfer trailing 1 byte, if any. */
3635 if (unlikely(buflen & 0x01)) {
3636 u16 align_buf[1] = { 0 };
3637 unsigned char *trailing_buf = buf + buflen - 1;
3638
3639 if (write_data) {
3640 memcpy(align_buf, trailing_buf, 1);
3641 outw(le16_to_cpu(align_buf[0]), ap->ioaddr.data_addr);
3642 } else {
3643 align_buf[0] = cpu_to_le16(inw(ap->ioaddr.data_addr));
3644 memcpy(trailing_buf, align_buf, 1);
3645 }
3646 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003647}
3648
Albert Lee6ae4cfb2005-08-12 14:15:34 +08003649/**
Alan Cox75e99582006-05-24 14:14:41 +01003650 * ata_pio_data_xfer_noirq - Transfer data by PIO
3651 * @adev: device to target
3652 * @buf: data buffer
3653 * @buflen: buffer length
3654 * @write_data: read/write
3655 *
Tejun Heo88574552006-06-25 20:00:35 +09003656 * Transfer data from/to the device data register by PIO. Do the
Alan Cox75e99582006-05-24 14:14:41 +01003657 * transfer with interrupts disabled.
3658 *
3659 * LOCKING:
3660 * Inherited from caller.
3661 */
3662
3663void ata_pio_data_xfer_noirq(struct ata_device *adev, unsigned char *buf,
3664 unsigned int buflen, int write_data)
3665{
3666 unsigned long flags;
3667 local_irq_save(flags);
3668 ata_pio_data_xfer(adev, buf, buflen, write_data);
3669 local_irq_restore(flags);
3670}
3671
3672
3673/**
Albert Lee6ae4cfb2005-08-12 14:15:34 +08003674 * ata_pio_sector - Transfer ATA_SECT_SIZE (512 bytes) of data.
3675 * @qc: Command on going
3676 *
3677 * Transfer ATA_SECT_SIZE of data from/to the ATA device.
3678 *
3679 * LOCKING:
3680 * Inherited from caller.
3681 */
3682
Linus Torvalds1da177e2005-04-16 15:20:36 -07003683static void ata_pio_sector(struct ata_queued_cmd *qc)
3684{
3685 int do_write = (qc->tf.flags & ATA_TFLAG_WRITE);
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003686 struct scatterlist *sg = qc->__sg;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003687 struct ata_port *ap = qc->ap;
3688 struct page *page;
3689 unsigned int offset;
3690 unsigned char *buf;
3691
3692 if (qc->cursect == (qc->nsect - 1))
Albert Lee14be71f2005-09-27 17:36:35 +08003693 ap->hsm_task_state = HSM_ST_LAST;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003694
3695 page = sg[qc->cursg].page;
3696 offset = sg[qc->cursg].offset + qc->cursg_ofs * ATA_SECT_SIZE;
3697
3698 /* get the current page and offset */
3699 page = nth_page(page, (offset >> PAGE_SHIFT));
3700 offset %= PAGE_SIZE;
3701
Albert Lee7282aa42005-10-09 09:46:07 -04003702 DPRINTK("data %s\n", qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read");
3703
Albert Lee91b8b312005-10-09 09:48:44 -04003704 if (PageHighMem(page)) {
3705 unsigned long flags;
Albert Lee7282aa42005-10-09 09:46:07 -04003706
Alan Coxa6b2c5d2006-05-22 16:59:59 +01003707 /* FIXME: use a bounce buffer */
Albert Lee91b8b312005-10-09 09:48:44 -04003708 local_irq_save(flags);
3709 buf = kmap_atomic(page, KM_IRQ0);
Albert Lee083958d2005-10-09 09:47:31 -04003710
Albert Lee91b8b312005-10-09 09:48:44 -04003711 /* do the actual data transfer */
Alan Coxa6b2c5d2006-05-22 16:59:59 +01003712 ap->ops->data_xfer(qc->dev, buf + offset, ATA_SECT_SIZE, do_write);
Albert Lee91b8b312005-10-09 09:48:44 -04003713
3714 kunmap_atomic(buf, KM_IRQ0);
3715 local_irq_restore(flags);
3716 } else {
3717 buf = page_address(page);
Alan Coxa6b2c5d2006-05-22 16:59:59 +01003718 ap->ops->data_xfer(qc->dev, buf + offset, ATA_SECT_SIZE, do_write);
Albert Lee91b8b312005-10-09 09:48:44 -04003719 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003720
3721 qc->cursect++;
3722 qc->cursg_ofs++;
3723
Albert Lee32529e02005-05-26 03:49:42 -04003724 if ((qc->cursg_ofs * ATA_SECT_SIZE) == (&sg[qc->cursg])->length) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003725 qc->cursg++;
3726 qc->cursg_ofs = 0;
3727 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003728}
Linus Torvalds1da177e2005-04-16 15:20:36 -07003729
Albert Lee6ae4cfb2005-08-12 14:15:34 +08003730/**
Albert Lee07f6f7d2005-11-01 19:33:20 +08003731 * ata_pio_sectors - Transfer one or many 512-byte sectors.
3732 * @qc: Command on going
3733 *
Jeff Garzikc81e29b2006-05-24 01:49:12 -04003734 * Transfer one or many ATA_SECT_SIZE of data from/to the
Albert Lee07f6f7d2005-11-01 19:33:20 +08003735 * ATA device for the DRQ request.
3736 *
3737 * LOCKING:
3738 * Inherited from caller.
3739 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003740
Albert Lee07f6f7d2005-11-01 19:33:20 +08003741static void ata_pio_sectors(struct ata_queued_cmd *qc)
3742{
3743 if (is_multi_taskfile(&qc->tf)) {
3744 /* READ/WRITE MULTIPLE */
3745 unsigned int nsect;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003746
Jeff Garzik587005d2006-02-11 18:17:32 -05003747 WARN_ON(qc->dev->multi_count == 0);
Albert Lee07f6f7d2005-11-01 19:33:20 +08003748
3749 nsect = min(qc->nsect - qc->cursect, qc->dev->multi_count);
3750 while (nsect--)
3751 ata_pio_sector(qc);
3752 } else
3753 ata_pio_sector(qc);
3754}
3755
3756/**
Albert Leec71c1852005-10-04 06:03:45 -04003757 * atapi_send_cdb - Write CDB bytes to hardware
3758 * @ap: Port to which ATAPI device is attached.
3759 * @qc: Taskfile currently active
3760 *
3761 * When device has indicated its readiness to accept
3762 * a CDB, this function is called. Send the CDB.
3763 *
3764 * LOCKING:
3765 * caller.
3766 */
3767
3768static void atapi_send_cdb(struct ata_port *ap, struct ata_queued_cmd *qc)
3769{
3770 /* send SCSI cdb */
3771 DPRINTK("send cdb\n");
Jeff Garzikdb024d52006-02-13 00:23:57 -05003772 WARN_ON(qc->dev->cdb_len < 12);
Albert Leec71c1852005-10-04 06:03:45 -04003773
Alan Coxa6b2c5d2006-05-22 16:59:59 +01003774 ap->ops->data_xfer(qc->dev, qc->cdb, qc->dev->cdb_len, 1);
Albert Leec71c1852005-10-04 06:03:45 -04003775 ata_altstatus(ap); /* flush */
3776
3777 switch (qc->tf.protocol) {
3778 case ATA_PROT_ATAPI:
3779 ap->hsm_task_state = HSM_ST;
3780 break;
3781 case ATA_PROT_ATAPI_NODATA:
3782 ap->hsm_task_state = HSM_ST_LAST;
3783 break;
3784 case ATA_PROT_ATAPI_DMA:
3785 ap->hsm_task_state = HSM_ST_LAST;
3786 /* initiate bmdma */
3787 ap->ops->bmdma_start(qc);
3788 break;
3789 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003790}
3791
Albert Lee6ae4cfb2005-08-12 14:15:34 +08003792/**
3793 * __atapi_pio_bytes - Transfer data from/to the ATAPI device.
3794 * @qc: Command on going
3795 * @bytes: number of bytes
3796 *
3797 * Transfer Transfer data from/to the ATAPI device.
3798 *
3799 * LOCKING:
3800 * Inherited from caller.
3801 *
3802 */
3803
Linus Torvalds1da177e2005-04-16 15:20:36 -07003804static void __atapi_pio_bytes(struct ata_queued_cmd *qc, unsigned int bytes)
3805{
3806 int do_write = (qc->tf.flags & ATA_TFLAG_WRITE);
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003807 struct scatterlist *sg = qc->__sg;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003808 struct ata_port *ap = qc->ap;
3809 struct page *page;
3810 unsigned char *buf;
3811 unsigned int offset, count;
3812
Albert Lee563a6e12005-08-12 14:17:50 +08003813 if (qc->curbytes + bytes >= qc->nbytes)
Albert Lee14be71f2005-09-27 17:36:35 +08003814 ap->hsm_task_state = HSM_ST_LAST;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003815
3816next_sg:
Albert Lee563a6e12005-08-12 14:17:50 +08003817 if (unlikely(qc->cursg >= qc->n_elem)) {
Jeff Garzik7fb6ec22005-09-16 06:01:48 -04003818 /*
Albert Lee563a6e12005-08-12 14:17:50 +08003819 * The end of qc->sg is reached and the device expects
3820 * more data to transfer. In order not to overrun qc->sg
3821 * and fulfill length specified in the byte count register,
3822 * - for read case, discard trailing data from the device
3823 * - for write case, padding zero data to the device
3824 */
3825 u16 pad_buf[1] = { 0 };
3826 unsigned int words = bytes >> 1;
3827 unsigned int i;
3828
3829 if (words) /* warning if bytes > 1 */
Tejun Heof15a1da2006-05-15 20:57:56 +09003830 ata_dev_printk(qc->dev, KERN_WARNING,
3831 "%u bytes trailing data\n", bytes);
Albert Lee563a6e12005-08-12 14:17:50 +08003832
3833 for (i = 0; i < words; i++)
Alan Coxa6b2c5d2006-05-22 16:59:59 +01003834 ap->ops->data_xfer(qc->dev, (unsigned char*)pad_buf, 2, do_write);
Albert Lee563a6e12005-08-12 14:17:50 +08003835
Albert Lee14be71f2005-09-27 17:36:35 +08003836 ap->hsm_task_state = HSM_ST_LAST;
Albert Lee563a6e12005-08-12 14:17:50 +08003837 return;
3838 }
3839
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003840 sg = &qc->__sg[qc->cursg];
Linus Torvalds1da177e2005-04-16 15:20:36 -07003841
Linus Torvalds1da177e2005-04-16 15:20:36 -07003842 page = sg->page;
3843 offset = sg->offset + qc->cursg_ofs;
3844
3845 /* get the current page and offset */
3846 page = nth_page(page, (offset >> PAGE_SHIFT));
3847 offset %= PAGE_SIZE;
3848
Albert Lee6952df02005-06-06 15:56:03 +08003849 /* don't overrun current sg */
Albert Lee32529e02005-05-26 03:49:42 -04003850 count = min(sg->length - qc->cursg_ofs, bytes);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003851
3852 /* don't cross page boundaries */
3853 count = min(count, (unsigned int)PAGE_SIZE - offset);
3854
Albert Lee7282aa42005-10-09 09:46:07 -04003855 DPRINTK("data %s\n", qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read");
3856
Albert Lee91b8b312005-10-09 09:48:44 -04003857 if (PageHighMem(page)) {
3858 unsigned long flags;
Albert Lee7282aa42005-10-09 09:46:07 -04003859
Alan Coxa6b2c5d2006-05-22 16:59:59 +01003860 /* FIXME: use bounce buffer */
Albert Lee91b8b312005-10-09 09:48:44 -04003861 local_irq_save(flags);
3862 buf = kmap_atomic(page, KM_IRQ0);
Albert Lee083958d2005-10-09 09:47:31 -04003863
Albert Lee91b8b312005-10-09 09:48:44 -04003864 /* do the actual data transfer */
Alan Coxa6b2c5d2006-05-22 16:59:59 +01003865 ap->ops->data_xfer(qc->dev, buf + offset, count, do_write);
Albert Lee91b8b312005-10-09 09:48:44 -04003866
3867 kunmap_atomic(buf, KM_IRQ0);
3868 local_irq_restore(flags);
3869 } else {
3870 buf = page_address(page);
Alan Coxa6b2c5d2006-05-22 16:59:59 +01003871 ap->ops->data_xfer(qc->dev, buf + offset, count, do_write);
Albert Lee91b8b312005-10-09 09:48:44 -04003872 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003873
3874 bytes -= count;
3875 qc->curbytes += count;
3876 qc->cursg_ofs += count;
3877
Albert Lee32529e02005-05-26 03:49:42 -04003878 if (qc->cursg_ofs == sg->length) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003879 qc->cursg++;
3880 qc->cursg_ofs = 0;
3881 }
3882
Albert Lee563a6e12005-08-12 14:17:50 +08003883 if (bytes)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003884 goto next_sg;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003885}
3886
Albert Lee6ae4cfb2005-08-12 14:15:34 +08003887/**
3888 * atapi_pio_bytes - Transfer data from/to the ATAPI device.
3889 * @qc: Command on going
3890 *
3891 * Transfer Transfer data from/to the ATAPI device.
3892 *
3893 * LOCKING:
3894 * Inherited from caller.
Albert Lee6ae4cfb2005-08-12 14:15:34 +08003895 */
3896
Linus Torvalds1da177e2005-04-16 15:20:36 -07003897static void atapi_pio_bytes(struct ata_queued_cmd *qc)
3898{
3899 struct ata_port *ap = qc->ap;
3900 struct ata_device *dev = qc->dev;
3901 unsigned int ireason, bc_lo, bc_hi, bytes;
3902 int i_write, do_write = (qc->tf.flags & ATA_TFLAG_WRITE) ? 1 : 0;
3903
Albert Leeeec4c3f2006-05-18 17:51:10 +08003904 /* Abuse qc->result_tf for temp storage of intermediate TF
3905 * here to save some kernel stack usage.
3906 * For normal completion, qc->result_tf is not relevant. For
3907 * error, qc->result_tf is later overwritten by ata_qc_complete().
3908 * So, the correctness of qc->result_tf is not affected.
3909 */
3910 ap->ops->tf_read(ap, &qc->result_tf);
3911 ireason = qc->result_tf.nsect;
3912 bc_lo = qc->result_tf.lbam;
3913 bc_hi = qc->result_tf.lbah;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003914 bytes = (bc_hi << 8) | bc_lo;
3915
3916 /* shall be cleared to zero, indicating xfer of data */
3917 if (ireason & (1 << 0))
3918 goto err_out;
3919
3920 /* make sure transfer direction matches expected */
3921 i_write = ((ireason & (1 << 1)) == 0) ? 1 : 0;
3922 if (do_write != i_write)
3923 goto err_out;
3924
Albert Lee312f7da2005-09-27 17:38:03 +08003925 VPRINTK("ata%u: xfering %d bytes\n", ap->id, bytes);
3926
Linus Torvalds1da177e2005-04-16 15:20:36 -07003927 __atapi_pio_bytes(qc, bytes);
3928
3929 return;
3930
3931err_out:
Tejun Heof15a1da2006-05-15 20:57:56 +09003932 ata_dev_printk(dev, KERN_INFO, "ATAPI check failed\n");
Tejun Heo11a56d22006-01-23 13:09:36 +09003933 qc->err_mask |= AC_ERR_HSM;
Albert Lee14be71f2005-09-27 17:36:35 +08003934 ap->hsm_task_state = HSM_ST_ERR;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003935}
3936
3937/**
Albert Leec234fb02006-03-25 17:58:38 +08003938 * ata_hsm_ok_in_wq - Check if the qc can be handled in the workqueue.
3939 * @ap: the target ata_port
3940 * @qc: qc on going
Linus Torvalds1da177e2005-04-16 15:20:36 -07003941 *
Albert Leec234fb02006-03-25 17:58:38 +08003942 * RETURNS:
3943 * 1 if ok in workqueue, 0 otherwise.
Linus Torvalds1da177e2005-04-16 15:20:36 -07003944 */
Albert Leec234fb02006-03-25 17:58:38 +08003945
3946static inline int ata_hsm_ok_in_wq(struct ata_port *ap, struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003947{
Albert Leec234fb02006-03-25 17:58:38 +08003948 if (qc->tf.flags & ATA_TFLAG_POLLING)
3949 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003950
Albert Leec234fb02006-03-25 17:58:38 +08003951 if (ap->hsm_task_state == HSM_ST_FIRST) {
3952 if (qc->tf.protocol == ATA_PROT_PIO &&
3953 (qc->tf.flags & ATA_TFLAG_WRITE))
3954 return 1;
3955
3956 if (is_atapi_taskfile(&qc->tf) &&
3957 !(qc->dev->flags & ATA_DFLAG_CDB_INTR))
3958 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003959 }
3960
Albert Leec234fb02006-03-25 17:58:38 +08003961 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003962}
3963
Albert Leec234fb02006-03-25 17:58:38 +08003964/**
Tejun Heoc17ea202006-05-15 20:59:29 +09003965 * ata_hsm_qc_complete - finish a qc running on standard HSM
3966 * @qc: Command to complete
3967 * @in_wq: 1 if called from workqueue, 0 otherwise
3968 *
3969 * Finish @qc which is running on standard HSM.
3970 *
3971 * LOCKING:
3972 * If @in_wq is zero, spin_lock_irqsave(host_set lock).
3973 * Otherwise, none on entry and grabs host lock.
3974 */
3975static void ata_hsm_qc_complete(struct ata_queued_cmd *qc, int in_wq)
3976{
3977 struct ata_port *ap = qc->ap;
3978 unsigned long flags;
3979
3980 if (ap->ops->error_handler) {
3981 if (in_wq) {
Jeff Garzikba6a1302006-06-22 23:46:10 -04003982 spin_lock_irqsave(ap->lock, flags);
Tejun Heoc17ea202006-05-15 20:59:29 +09003983
3984 /* EH might have kicked in while host_set lock
3985 * is released.
3986 */
3987 qc = ata_qc_from_tag(ap, qc->tag);
3988 if (qc) {
3989 if (likely(!(qc->err_mask & AC_ERR_HSM))) {
3990 ata_irq_on(ap);
3991 ata_qc_complete(qc);
3992 } else
3993 ata_port_freeze(ap);
3994 }
3995
Jeff Garzikba6a1302006-06-22 23:46:10 -04003996 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heoc17ea202006-05-15 20:59:29 +09003997 } else {
3998 if (likely(!(qc->err_mask & AC_ERR_HSM)))
3999 ata_qc_complete(qc);
4000 else
4001 ata_port_freeze(ap);
4002 }
4003 } else {
4004 if (in_wq) {
Jeff Garzikba6a1302006-06-22 23:46:10 -04004005 spin_lock_irqsave(ap->lock, flags);
Tejun Heoc17ea202006-05-15 20:59:29 +09004006 ata_irq_on(ap);
4007 ata_qc_complete(qc);
Jeff Garzikba6a1302006-06-22 23:46:10 -04004008 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heoc17ea202006-05-15 20:59:29 +09004009 } else
4010 ata_qc_complete(qc);
4011 }
Jeff Garzikc81e29b2006-05-24 01:49:12 -04004012
4013 ata_altstatus(ap); /* flush */
Tejun Heoc17ea202006-05-15 20:59:29 +09004014}
4015
4016/**
Albert Leebb5cb292006-03-25 17:48:02 +08004017 * ata_hsm_move - move the HSM to the next state.
4018 * @ap: the target ata_port
4019 * @qc: qc on going
4020 * @status: current device status
4021 * @in_wq: 1 if called from workqueue, 0 otherwise
4022 *
4023 * RETURNS:
4024 * 1 when poll next status needed, 0 otherwise.
4025 */
Tejun Heo9a1004d2006-05-31 18:27:52 +09004026int ata_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc,
4027 u8 status, int in_wq)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004028{
Albert Leebb5cb292006-03-25 17:48:02 +08004029 unsigned long flags = 0;
4030 int poll_next;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004031
Albert Lee6912ccd2006-03-25 17:45:49 +08004032 WARN_ON((qc->flags & ATA_QCFLAG_ACTIVE) == 0);
Albert Lee0565c262006-02-13 18:55:25 +08004033
Albert Leebb5cb292006-03-25 17:48:02 +08004034 /* Make sure ata_qc_issue_prot() does not throw things
4035 * like DMA polling into the workqueue. Notice that
4036 * in_wq is not equivalent to (qc->tf.flags & ATA_TFLAG_POLLING).
Albert Lee1c848982005-12-05 15:40:15 +08004037 */
Albert Leec234fb02006-03-25 17:58:38 +08004038 WARN_ON(in_wq != ata_hsm_ok_in_wq(ap, qc));
Albert Lee1c848982005-12-05 15:40:15 +08004039
Albert Leee2cec772006-03-25 17:43:49 +08004040fsm_start:
Albert Lee999bb6f2006-03-25 18:07:48 +08004041 DPRINTK("ata%u: protocol %d task_state %d (dev_stat 0x%X)\n",
4042 ap->id, qc->tf.protocol, ap->hsm_task_state, status);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004043
Albert Leee2cec772006-03-25 17:43:49 +08004044 switch (ap->hsm_task_state) {
4045 case HSM_ST_FIRST:
Albert Leebb5cb292006-03-25 17:48:02 +08004046 /* Send first data block or PACKET CDB */
4047
4048 /* If polling, we will stay in the work queue after
4049 * sending the data. Otherwise, interrupt handler
4050 * takes over after sending the data.
4051 */
4052 poll_next = (qc->tf.flags & ATA_TFLAG_POLLING);
4053
Albert Leee2cec772006-03-25 17:43:49 +08004054 /* check device status */
Albert Lee3655d1d2006-05-19 11:43:04 +08004055 if (unlikely((status & ATA_DRQ) == 0)) {
4056 /* handle BSY=0, DRQ=0 as error */
4057 if (likely(status & (ATA_ERR | ATA_DF)))
4058 /* device stops HSM for abort/error */
4059 qc->err_mask |= AC_ERR_DEV;
4060 else
4061 /* HSM violation. Let EH handle this */
4062 qc->err_mask |= AC_ERR_HSM;
4063
Albert Leee2cec772006-03-25 17:43:49 +08004064 ap->hsm_task_state = HSM_ST_ERR;
4065 goto fsm_start;
4066 }
4067
Albert Lee71601952006-03-25 18:11:12 +08004068 /* Device should not ask for data transfer (DRQ=1)
4069 * when it finds something wrong.
Albert Leeeee6c322006-04-01 17:38:43 +08004070 * We ignore DRQ here and stop the HSM by
4071 * changing hsm_task_state to HSM_ST_ERR and
4072 * let the EH abort the command or reset the device.
Albert Lee71601952006-03-25 18:11:12 +08004073 */
4074 if (unlikely(status & (ATA_ERR | ATA_DF))) {
4075 printk(KERN_WARNING "ata%d: DRQ=1 with device error, dev_stat 0x%X\n",
4076 ap->id, status);
Albert Lee3655d1d2006-05-19 11:43:04 +08004077 qc->err_mask |= AC_ERR_HSM;
Albert Leeeee6c322006-04-01 17:38:43 +08004078 ap->hsm_task_state = HSM_ST_ERR;
4079 goto fsm_start;
Albert Lee71601952006-03-25 18:11:12 +08004080 }
4081
Albert Leebb5cb292006-03-25 17:48:02 +08004082 /* Send the CDB (atapi) or the first data block (ata pio out).
4083 * During the state transition, interrupt handler shouldn't
4084 * be invoked before the data transfer is complete and
4085 * hsm_task_state is changed. Hence, the following locking.
4086 */
4087 if (in_wq)
Jeff Garzikba6a1302006-06-22 23:46:10 -04004088 spin_lock_irqsave(ap->lock, flags);
Albert Leee2cec772006-03-25 17:43:49 +08004089
Albert Leebb5cb292006-03-25 17:48:02 +08004090 if (qc->tf.protocol == ATA_PROT_PIO) {
4091 /* PIO data out protocol.
4092 * send first data block.
4093 */
4094
4095 /* ata_pio_sectors() might change the state
4096 * to HSM_ST_LAST. so, the state is changed here
4097 * before ata_pio_sectors().
4098 */
4099 ap->hsm_task_state = HSM_ST;
4100 ata_pio_sectors(qc);
4101 ata_altstatus(ap); /* flush */
4102 } else
4103 /* send CDB */
4104 atapi_send_cdb(ap, qc);
4105
4106 if (in_wq)
Jeff Garzikba6a1302006-06-22 23:46:10 -04004107 spin_unlock_irqrestore(ap->lock, flags);
Albert Leebb5cb292006-03-25 17:48:02 +08004108
4109 /* if polling, ata_pio_task() handles the rest.
4110 * otherwise, interrupt handler takes over from here.
4111 */
Albert Leee2cec772006-03-25 17:43:49 +08004112 break;
4113
4114 case HSM_ST:
4115 /* complete command or read/write the data register */
4116 if (qc->tf.protocol == ATA_PROT_ATAPI) {
4117 /* ATAPI PIO protocol */
4118 if ((status & ATA_DRQ) == 0) {
Albert Lee3655d1d2006-05-19 11:43:04 +08004119 /* No more data to transfer or device error.
4120 * Device error will be tagged in HSM_ST_LAST.
4121 */
Albert Leee2cec772006-03-25 17:43:49 +08004122 ap->hsm_task_state = HSM_ST_LAST;
4123 goto fsm_start;
4124 }
4125
Albert Lee71601952006-03-25 18:11:12 +08004126 /* Device should not ask for data transfer (DRQ=1)
4127 * when it finds something wrong.
Albert Leeeee6c322006-04-01 17:38:43 +08004128 * We ignore DRQ here and stop the HSM by
4129 * changing hsm_task_state to HSM_ST_ERR and
4130 * let the EH abort the command or reset the device.
Albert Lee71601952006-03-25 18:11:12 +08004131 */
4132 if (unlikely(status & (ATA_ERR | ATA_DF))) {
4133 printk(KERN_WARNING "ata%d: DRQ=1 with device error, dev_stat 0x%X\n",
4134 ap->id, status);
Albert Lee3655d1d2006-05-19 11:43:04 +08004135 qc->err_mask |= AC_ERR_HSM;
Albert Leeeee6c322006-04-01 17:38:43 +08004136 ap->hsm_task_state = HSM_ST_ERR;
4137 goto fsm_start;
Albert Lee71601952006-03-25 18:11:12 +08004138 }
4139
Albert Leee2cec772006-03-25 17:43:49 +08004140 atapi_pio_bytes(qc);
4141
4142 if (unlikely(ap->hsm_task_state == HSM_ST_ERR))
4143 /* bad ireason reported by device */
4144 goto fsm_start;
4145
4146 } else {
4147 /* ATA PIO protocol */
4148 if (unlikely((status & ATA_DRQ) == 0)) {
4149 /* handle BSY=0, DRQ=0 as error */
Albert Lee3655d1d2006-05-19 11:43:04 +08004150 if (likely(status & (ATA_ERR | ATA_DF)))
4151 /* device stops HSM for abort/error */
4152 qc->err_mask |= AC_ERR_DEV;
4153 else
4154 /* HSM violation. Let EH handle this */
4155 qc->err_mask |= AC_ERR_HSM;
4156
Albert Leee2cec772006-03-25 17:43:49 +08004157 ap->hsm_task_state = HSM_ST_ERR;
4158 goto fsm_start;
4159 }
4160
Albert Leeeee6c322006-04-01 17:38:43 +08004161 /* For PIO reads, some devices may ask for
4162 * data transfer (DRQ=1) alone with ERR=1.
4163 * We respect DRQ here and transfer one
4164 * block of junk data before changing the
4165 * hsm_task_state to HSM_ST_ERR.
4166 *
4167 * For PIO writes, ERR=1 DRQ=1 doesn't make
4168 * sense since the data block has been
4169 * transferred to the device.
Albert Lee71601952006-03-25 18:11:12 +08004170 */
4171 if (unlikely(status & (ATA_ERR | ATA_DF))) {
Albert Lee71601952006-03-25 18:11:12 +08004172 /* data might be corrputed */
4173 qc->err_mask |= AC_ERR_DEV;
Albert Leeeee6c322006-04-01 17:38:43 +08004174
4175 if (!(qc->tf.flags & ATA_TFLAG_WRITE)) {
4176 ata_pio_sectors(qc);
4177 ata_altstatus(ap);
4178 status = ata_wait_idle(ap);
4179 }
4180
Albert Lee3655d1d2006-05-19 11:43:04 +08004181 if (status & (ATA_BUSY | ATA_DRQ))
4182 qc->err_mask |= AC_ERR_HSM;
4183
Albert Leeeee6c322006-04-01 17:38:43 +08004184 /* ata_pio_sectors() might change the
4185 * state to HSM_ST_LAST. so, the state
4186 * is changed after ata_pio_sectors().
4187 */
4188 ap->hsm_task_state = HSM_ST_ERR;
4189 goto fsm_start;
Albert Lee71601952006-03-25 18:11:12 +08004190 }
4191
Albert Leee2cec772006-03-25 17:43:49 +08004192 ata_pio_sectors(qc);
4193
4194 if (ap->hsm_task_state == HSM_ST_LAST &&
4195 (!(qc->tf.flags & ATA_TFLAG_WRITE))) {
4196 /* all data read */
4197 ata_altstatus(ap);
Albert Lee52a32202006-03-25 18:18:15 +08004198 status = ata_wait_idle(ap);
Albert Leee2cec772006-03-25 17:43:49 +08004199 goto fsm_start;
4200 }
4201 }
4202
4203 ata_altstatus(ap); /* flush */
Albert Leebb5cb292006-03-25 17:48:02 +08004204 poll_next = 1;
Albert Leee2cec772006-03-25 17:43:49 +08004205 break;
4206
4207 case HSM_ST_LAST:
Albert Lee6912ccd2006-03-25 17:45:49 +08004208 if (unlikely(!ata_ok(status))) {
4209 qc->err_mask |= __ac_err_mask(status);
Albert Leee2cec772006-03-25 17:43:49 +08004210 ap->hsm_task_state = HSM_ST_ERR;
4211 goto fsm_start;
4212 }
4213
4214 /* no more data to transfer */
Albert Lee4332a772006-04-03 17:43:24 +08004215 DPRINTK("ata%u: dev %u command complete, drv_stat 0x%x\n",
4216 ap->id, qc->dev->devno, status);
Albert Leee2cec772006-03-25 17:43:49 +08004217
Albert Lee6912ccd2006-03-25 17:45:49 +08004218 WARN_ON(qc->err_mask);
4219
Albert Leee2cec772006-03-25 17:43:49 +08004220 ap->hsm_task_state = HSM_ST_IDLE;
4221
4222 /* complete taskfile transaction */
Tejun Heoc17ea202006-05-15 20:59:29 +09004223 ata_hsm_qc_complete(qc, in_wq);
Albert Leebb5cb292006-03-25 17:48:02 +08004224
4225 poll_next = 0;
Albert Leee2cec772006-03-25 17:43:49 +08004226 break;
4227
4228 case HSM_ST_ERR:
Albert Leee2cec772006-03-25 17:43:49 +08004229 /* make sure qc->err_mask is available to
4230 * know what's wrong and recover
4231 */
4232 WARN_ON(qc->err_mask == 0);
4233
4234 ap->hsm_task_state = HSM_ST_IDLE;
Albert Leebb5cb292006-03-25 17:48:02 +08004235
Albert Lee999bb6f2006-03-25 18:07:48 +08004236 /* complete taskfile transaction */
Tejun Heoc17ea202006-05-15 20:59:29 +09004237 ata_hsm_qc_complete(qc, in_wq);
Albert Leebb5cb292006-03-25 17:48:02 +08004238
4239 poll_next = 0;
Albert Leee2cec772006-03-25 17:43:49 +08004240 break;
4241 default:
Albert Leebb5cb292006-03-25 17:48:02 +08004242 poll_next = 0;
Albert Lee6912ccd2006-03-25 17:45:49 +08004243 BUG();
Albert Leee2cec772006-03-25 17:43:49 +08004244 }
4245
Albert Leebb5cb292006-03-25 17:48:02 +08004246 return poll_next;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004247}
4248
4249static void ata_pio_task(void *_data)
4250{
Tejun Heoc91af2c2006-04-02 18:51:53 +09004251 struct ata_queued_cmd *qc = _data;
4252 struct ata_port *ap = qc->ap;
Albert Leea1af3732006-03-25 17:50:15 +08004253 u8 status;
4254 int poll_next;
Jeff Garzik7fb6ec22005-09-16 06:01:48 -04004255
4256fsm_start:
Albert Leea1af3732006-03-25 17:50:15 +08004257 WARN_ON(ap->hsm_task_state == HSM_ST_IDLE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004258
Albert Leea1af3732006-03-25 17:50:15 +08004259 /*
4260 * This is purely heuristic. This is a fast path.
4261 * Sometimes when we enter, BSY will be cleared in
4262 * a chk-status or two. If not, the drive is probably seeking
4263 * or something. Snooze for a couple msecs, then
4264 * chk-status again. If still busy, queue delayed work.
4265 */
4266 status = ata_busy_wait(ap, ATA_BUSY, 5);
4267 if (status & ATA_BUSY) {
4268 msleep(2);
4269 status = ata_busy_wait(ap, ATA_BUSY, 10);
4270 if (status & ATA_BUSY) {
Albert Lee31ce6da2006-04-03 18:31:44 +08004271 ata_port_queue_task(ap, ata_pio_task, qc, ATA_SHORT_PAUSE);
Albert Leea1af3732006-03-25 17:50:15 +08004272 return;
4273 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07004274 }
4275
Albert Leea1af3732006-03-25 17:50:15 +08004276 /* move the HSM */
4277 poll_next = ata_hsm_move(ap, qc, status, 1);
4278
4279 /* another command or interrupt handler
4280 * may be running at this point.
4281 */
4282 if (poll_next)
Jeff Garzik7fb6ec22005-09-16 06:01:48 -04004283 goto fsm_start;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004284}
4285
Linus Torvalds1da177e2005-04-16 15:20:36 -07004286/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07004287 * ata_qc_new - Request an available ATA command, for queueing
4288 * @ap: Port associated with device @dev
4289 * @dev: Device from whom we request an available command structure
4290 *
4291 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04004292 * None.
Linus Torvalds1da177e2005-04-16 15:20:36 -07004293 */
4294
4295static struct ata_queued_cmd *ata_qc_new(struct ata_port *ap)
4296{
4297 struct ata_queued_cmd *qc = NULL;
4298 unsigned int i;
4299
Tejun Heoe3180492006-05-15 20:58:09 +09004300 /* no command while frozen */
Tejun Heob51e9e52006-06-29 01:29:30 +09004301 if (unlikely(ap->pflags & ATA_PFLAG_FROZEN))
Tejun Heoe3180492006-05-15 20:58:09 +09004302 return NULL;
4303
Tejun Heo2ab7db12006-05-15 20:58:02 +09004304 /* the last tag is reserved for internal command. */
4305 for (i = 0; i < ATA_MAX_QUEUE - 1; i++)
Tejun Heo6cec4a32006-05-15 21:03:41 +09004306 if (!test_and_set_bit(i, &ap->qc_allocated)) {
Tejun Heof69499f2006-05-15 20:58:03 +09004307 qc = __ata_qc_from_tag(ap, i);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004308 break;
4309 }
4310
4311 if (qc)
4312 qc->tag = i;
4313
4314 return qc;
4315}
4316
4317/**
4318 * ata_qc_new_init - Request an available ATA command, and initialize it
Linus Torvalds1da177e2005-04-16 15:20:36 -07004319 * @dev: Device from whom we request an available command structure
4320 *
4321 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04004322 * None.
Linus Torvalds1da177e2005-04-16 15:20:36 -07004323 */
4324
Tejun Heo3373efd2006-05-15 20:57:53 +09004325struct ata_queued_cmd *ata_qc_new_init(struct ata_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004326{
Tejun Heo3373efd2006-05-15 20:57:53 +09004327 struct ata_port *ap = dev->ap;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004328 struct ata_queued_cmd *qc;
4329
4330 qc = ata_qc_new(ap);
4331 if (qc) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07004332 qc->scsicmd = NULL;
4333 qc->ap = ap;
4334 qc->dev = dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004335
Jeff Garzik2c13b7c2005-11-14 14:14:16 -05004336 ata_qc_reinit(qc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004337 }
4338
4339 return qc;
4340}
4341
Linus Torvalds1da177e2005-04-16 15:20:36 -07004342/**
4343 * ata_qc_free - free unused ata_queued_cmd
4344 * @qc: Command to complete
4345 *
4346 * Designed to free unused ata_queued_cmd object
4347 * in case something prevents using it.
4348 *
4349 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04004350 * spin_lock_irqsave(host_set lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004351 */
4352void ata_qc_free(struct ata_queued_cmd *qc)
4353{
Tejun Heo4ba946e2006-01-23 13:09:36 +09004354 struct ata_port *ap = qc->ap;
4355 unsigned int tag;
4356
Tejun Heoa46314742006-02-11 19:11:13 +09004357 WARN_ON(qc == NULL); /* ata_qc_from_tag _might_ return NULL */
Linus Torvalds1da177e2005-04-16 15:20:36 -07004358
Tejun Heo4ba946e2006-01-23 13:09:36 +09004359 qc->flags = 0;
4360 tag = qc->tag;
4361 if (likely(ata_tag_valid(tag))) {
Tejun Heo4ba946e2006-01-23 13:09:36 +09004362 qc->tag = ATA_TAG_POISON;
Tejun Heo6cec4a32006-05-15 21:03:41 +09004363 clear_bit(tag, &ap->qc_allocated);
Tejun Heo4ba946e2006-01-23 13:09:36 +09004364 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07004365}
4366
Tejun Heo76014422006-02-11 15:13:49 +09004367void __ata_qc_complete(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004368{
Tejun Heodedaf2b2006-05-15 21:03:43 +09004369 struct ata_port *ap = qc->ap;
4370
Tejun Heoa46314742006-02-11 19:11:13 +09004371 WARN_ON(qc == NULL); /* ata_qc_from_tag _might_ return NULL */
4372 WARN_ON(!(qc->flags & ATA_QCFLAG_ACTIVE));
Linus Torvalds1da177e2005-04-16 15:20:36 -07004373
4374 if (likely(qc->flags & ATA_QCFLAG_DMAMAP))
4375 ata_sg_clean(qc);
4376
Tejun Heo7401abf2006-05-15 20:57:32 +09004377 /* command should be marked inactive atomically with qc completion */
Tejun Heodedaf2b2006-05-15 21:03:43 +09004378 if (qc->tf.protocol == ATA_PROT_NCQ)
4379 ap->sactive &= ~(1 << qc->tag);
4380 else
4381 ap->active_tag = ATA_TAG_POISON;
Tejun Heo7401abf2006-05-15 20:57:32 +09004382
Albert Lee3f3791d2005-08-16 14:25:38 +08004383 /* atapi: mark qc as inactive to prevent the interrupt handler
4384 * from completing the command twice later, before the error handler
4385 * is called. (when rc != 0 and atapi request sense is needed)
4386 */
4387 qc->flags &= ~ATA_QCFLAG_ACTIVE;
Tejun Heodedaf2b2006-05-15 21:03:43 +09004388 ap->qc_active &= ~(1 << qc->tag);
Albert Lee3f3791d2005-08-16 14:25:38 +08004389
Linus Torvalds1da177e2005-04-16 15:20:36 -07004390 /* call completion callback */
Tejun Heo77853bf2006-01-23 13:09:36 +09004391 qc->complete_fn(qc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004392}
4393
Tejun Heof686bcb2006-05-15 20:58:05 +09004394/**
4395 * ata_qc_complete - Complete an active ATA command
4396 * @qc: Command to complete
4397 * @err_mask: ATA Status register contents
4398 *
4399 * Indicate to the mid and upper layers that an ATA
4400 * command has completed, with either an ok or not-ok status.
4401 *
4402 * LOCKING:
4403 * spin_lock_irqsave(host_set lock)
4404 */
4405void ata_qc_complete(struct ata_queued_cmd *qc)
4406{
4407 struct ata_port *ap = qc->ap;
4408
4409 /* XXX: New EH and old EH use different mechanisms to
4410 * synchronize EH with regular execution path.
4411 *
4412 * In new EH, a failed qc is marked with ATA_QCFLAG_FAILED.
4413 * Normal execution path is responsible for not accessing a
4414 * failed qc. libata core enforces the rule by returning NULL
4415 * from ata_qc_from_tag() for failed qcs.
4416 *
4417 * Old EH depends on ata_qc_complete() nullifying completion
4418 * requests if ATA_QCFLAG_EH_SCHEDULED is set. Old EH does
4419 * not synchronize with interrupt handler. Only PIO task is
4420 * taken care of.
4421 */
4422 if (ap->ops->error_handler) {
Tejun Heob51e9e52006-06-29 01:29:30 +09004423 WARN_ON(ap->pflags & ATA_PFLAG_FROZEN);
Tejun Heof686bcb2006-05-15 20:58:05 +09004424
4425 if (unlikely(qc->err_mask))
4426 qc->flags |= ATA_QCFLAG_FAILED;
4427
4428 if (unlikely(qc->flags & ATA_QCFLAG_FAILED)) {
4429 if (!ata_tag_internal(qc->tag)) {
4430 /* always fill result TF for failed qc */
4431 ap->ops->tf_read(ap, &qc->result_tf);
4432 ata_qc_schedule_eh(qc);
4433 return;
4434 }
4435 }
4436
4437 /* read result TF if requested */
4438 if (qc->flags & ATA_QCFLAG_RESULT_TF)
4439 ap->ops->tf_read(ap, &qc->result_tf);
4440
4441 __ata_qc_complete(qc);
4442 } else {
4443 if (qc->flags & ATA_QCFLAG_EH_SCHEDULED)
4444 return;
4445
4446 /* read result TF if failed or requested */
4447 if (qc->err_mask || qc->flags & ATA_QCFLAG_RESULT_TF)
4448 ap->ops->tf_read(ap, &qc->result_tf);
4449
4450 __ata_qc_complete(qc);
4451 }
4452}
4453
Tejun Heodedaf2b2006-05-15 21:03:43 +09004454/**
4455 * ata_qc_complete_multiple - Complete multiple qcs successfully
4456 * @ap: port in question
4457 * @qc_active: new qc_active mask
4458 * @finish_qc: LLDD callback invoked before completing a qc
4459 *
4460 * Complete in-flight commands. This functions is meant to be
4461 * called from low-level driver's interrupt routine to complete
4462 * requests normally. ap->qc_active and @qc_active is compared
4463 * and commands are completed accordingly.
4464 *
4465 * LOCKING:
4466 * spin_lock_irqsave(host_set lock)
4467 *
4468 * RETURNS:
4469 * Number of completed commands on success, -errno otherwise.
4470 */
4471int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active,
4472 void (*finish_qc)(struct ata_queued_cmd *))
4473{
4474 int nr_done = 0;
4475 u32 done_mask;
4476 int i;
4477
4478 done_mask = ap->qc_active ^ qc_active;
4479
4480 if (unlikely(done_mask & qc_active)) {
4481 ata_port_printk(ap, KERN_ERR, "illegal qc_active transition "
4482 "(%08x->%08x)\n", ap->qc_active, qc_active);
4483 return -EINVAL;
4484 }
4485
4486 for (i = 0; i < ATA_MAX_QUEUE; i++) {
4487 struct ata_queued_cmd *qc;
4488
4489 if (!(done_mask & (1 << i)))
4490 continue;
4491
4492 if ((qc = ata_qc_from_tag(ap, i))) {
4493 if (finish_qc)
4494 finish_qc(qc);
4495 ata_qc_complete(qc);
4496 nr_done++;
4497 }
4498 }
4499
4500 return nr_done;
4501}
4502
Linus Torvalds1da177e2005-04-16 15:20:36 -07004503static inline int ata_should_dma_map(struct ata_queued_cmd *qc)
4504{
4505 struct ata_port *ap = qc->ap;
4506
4507 switch (qc->tf.protocol) {
Tejun Heo3dc1d882006-05-15 21:03:45 +09004508 case ATA_PROT_NCQ:
Linus Torvalds1da177e2005-04-16 15:20:36 -07004509 case ATA_PROT_DMA:
4510 case ATA_PROT_ATAPI_DMA:
4511 return 1;
4512
4513 case ATA_PROT_ATAPI:
4514 case ATA_PROT_PIO:
Linus Torvalds1da177e2005-04-16 15:20:36 -07004515 if (ap->flags & ATA_FLAG_PIO_DMA)
4516 return 1;
4517
4518 /* fall through */
4519
4520 default:
4521 return 0;
4522 }
4523
4524 /* never reached */
4525}
4526
4527/**
4528 * ata_qc_issue - issue taskfile to device
4529 * @qc: command to issue to device
4530 *
4531 * Prepare an ATA command to submission to device.
4532 * This includes mapping the data into a DMA-able
4533 * area, filling in the S/G table, and finally
4534 * writing the taskfile to hardware, starting the command.
4535 *
4536 * LOCKING:
4537 * spin_lock_irqsave(host_set lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004538 */
Tejun Heo8e0e6942006-03-31 20:41:11 +09004539void ata_qc_issue(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004540{
4541 struct ata_port *ap = qc->ap;
4542
Tejun Heodedaf2b2006-05-15 21:03:43 +09004543 /* Make sure only one non-NCQ command is outstanding. The
4544 * check is skipped for old EH because it reuses active qc to
4545 * request ATAPI sense.
4546 */
4547 WARN_ON(ap->ops->error_handler && ata_tag_valid(ap->active_tag));
4548
4549 if (qc->tf.protocol == ATA_PROT_NCQ) {
4550 WARN_ON(ap->sactive & (1 << qc->tag));
4551 ap->sactive |= 1 << qc->tag;
4552 } else {
4553 WARN_ON(ap->sactive);
4554 ap->active_tag = qc->tag;
4555 }
4556
Tejun Heoe4a70e72006-03-31 20:36:47 +09004557 qc->flags |= ATA_QCFLAG_ACTIVE;
Tejun Heodedaf2b2006-05-15 21:03:43 +09004558 ap->qc_active |= 1 << qc->tag;
Tejun Heoe4a70e72006-03-31 20:36:47 +09004559
Linus Torvalds1da177e2005-04-16 15:20:36 -07004560 if (ata_should_dma_map(qc)) {
4561 if (qc->flags & ATA_QCFLAG_SG) {
4562 if (ata_sg_setup(qc))
Tejun Heo8e436af2006-01-23 13:09:36 +09004563 goto sg_err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004564 } else if (qc->flags & ATA_QCFLAG_SINGLE) {
4565 if (ata_sg_setup_one(qc))
Tejun Heo8e436af2006-01-23 13:09:36 +09004566 goto sg_err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004567 }
4568 } else {
4569 qc->flags &= ~ATA_QCFLAG_DMAMAP;
4570 }
4571
4572 ap->ops->qc_prep(qc);
4573
Tejun Heo8e0e6942006-03-31 20:41:11 +09004574 qc->err_mask |= ap->ops->qc_issue(qc);
4575 if (unlikely(qc->err_mask))
4576 goto err;
4577 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004578
Tejun Heo8e436af2006-01-23 13:09:36 +09004579sg_err:
4580 qc->flags &= ~ATA_QCFLAG_DMAMAP;
Tejun Heo8e0e6942006-03-31 20:41:11 +09004581 qc->err_mask |= AC_ERR_SYSTEM;
4582err:
4583 ata_qc_complete(qc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004584}
4585
4586/**
4587 * ata_qc_issue_prot - issue taskfile to device in proto-dependent manner
4588 * @qc: command to issue to device
4589 *
4590 * Using various libata functions and hooks, this function
4591 * starts an ATA command. ATA commands are grouped into
4592 * classes called "protocols", and issuing each type of protocol
4593 * is slightly different.
4594 *
Edward Falk0baab862005-06-02 18:17:13 -04004595 * May be used as the qc_issue() entry in ata_port_operations.
4596 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07004597 * LOCKING:
4598 * spin_lock_irqsave(host_set lock)
4599 *
4600 * RETURNS:
Tejun Heo9a3d9eb2006-01-23 13:09:36 +09004601 * Zero on success, AC_ERR_* mask on failure
Linus Torvalds1da177e2005-04-16 15:20:36 -07004602 */
4603
Tejun Heo9a3d9eb2006-01-23 13:09:36 +09004604unsigned int ata_qc_issue_prot(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004605{
4606 struct ata_port *ap = qc->ap;
4607
Albert Leee50362e2005-09-27 17:39:50 +08004608 /* Use polling pio if the LLD doesn't handle
4609 * interrupt driven pio and atapi CDB interrupt.
4610 */
4611 if (ap->flags & ATA_FLAG_PIO_POLLING) {
4612 switch (qc->tf.protocol) {
4613 case ATA_PROT_PIO:
4614 case ATA_PROT_ATAPI:
4615 case ATA_PROT_ATAPI_NODATA:
4616 qc->tf.flags |= ATA_TFLAG_POLLING;
4617 break;
4618 case ATA_PROT_ATAPI_DMA:
4619 if (qc->dev->flags & ATA_DFLAG_CDB_INTR)
Albert Lee3a778272006-06-22 13:00:25 +08004620 /* see ata_dma_blacklisted() */
Albert Leee50362e2005-09-27 17:39:50 +08004621 BUG();
4622 break;
4623 default:
4624 break;
4625 }
4626 }
4627
Albert Lee312f7da2005-09-27 17:38:03 +08004628 /* select the device */
Linus Torvalds1da177e2005-04-16 15:20:36 -07004629 ata_dev_select(ap, qc->dev->devno, 1, 0);
4630
Albert Lee312f7da2005-09-27 17:38:03 +08004631 /* start the command */
Linus Torvalds1da177e2005-04-16 15:20:36 -07004632 switch (qc->tf.protocol) {
4633 case ATA_PROT_NODATA:
Albert Lee312f7da2005-09-27 17:38:03 +08004634 if (qc->tf.flags & ATA_TFLAG_POLLING)
4635 ata_qc_set_polling(qc);
4636
Jeff Garzike5338252005-10-30 21:37:17 -05004637 ata_tf_to_host(ap, &qc->tf);
Albert Lee312f7da2005-09-27 17:38:03 +08004638 ap->hsm_task_state = HSM_ST_LAST;
4639
4640 if (qc->tf.flags & ATA_TFLAG_POLLING)
Albert Lee31ce6da2006-04-03 18:31:44 +08004641 ata_port_queue_task(ap, ata_pio_task, qc, 0);
Albert Lee312f7da2005-09-27 17:38:03 +08004642
Linus Torvalds1da177e2005-04-16 15:20:36 -07004643 break;
4644
4645 case ATA_PROT_DMA:
Jeff Garzik587005d2006-02-11 18:17:32 -05004646 WARN_ON(qc->tf.flags & ATA_TFLAG_POLLING);
Albert Lee312f7da2005-09-27 17:38:03 +08004647
Linus Torvalds1da177e2005-04-16 15:20:36 -07004648 ap->ops->tf_load(ap, &qc->tf); /* load tf registers */
4649 ap->ops->bmdma_setup(qc); /* set up bmdma */
4650 ap->ops->bmdma_start(qc); /* initiate bmdma */
Albert Lee312f7da2005-09-27 17:38:03 +08004651 ap->hsm_task_state = HSM_ST_LAST;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004652 break;
4653
Albert Lee312f7da2005-09-27 17:38:03 +08004654 case ATA_PROT_PIO:
4655 if (qc->tf.flags & ATA_TFLAG_POLLING)
4656 ata_qc_set_polling(qc);
4657
Jeff Garzike5338252005-10-30 21:37:17 -05004658 ata_tf_to_host(ap, &qc->tf);
Albert Lee312f7da2005-09-27 17:38:03 +08004659
Albert Lee54f00382005-09-30 19:14:19 +08004660 if (qc->tf.flags & ATA_TFLAG_WRITE) {
4661 /* PIO data out protocol */
4662 ap->hsm_task_state = HSM_ST_FIRST;
Albert Lee31ce6da2006-04-03 18:31:44 +08004663 ata_port_queue_task(ap, ata_pio_task, qc, 0);
Albert Lee54f00382005-09-30 19:14:19 +08004664
4665 /* always send first data block using
Albert Leee27486d2005-11-01 19:24:49 +08004666 * the ata_pio_task() codepath.
Albert Lee54f00382005-09-30 19:14:19 +08004667 */
Albert Lee312f7da2005-09-27 17:38:03 +08004668 } else {
Albert Lee54f00382005-09-30 19:14:19 +08004669 /* PIO data in protocol */
4670 ap->hsm_task_state = HSM_ST;
Albert Lee312f7da2005-09-27 17:38:03 +08004671
Albert Lee54f00382005-09-30 19:14:19 +08004672 if (qc->tf.flags & ATA_TFLAG_POLLING)
Albert Lee31ce6da2006-04-03 18:31:44 +08004673 ata_port_queue_task(ap, ata_pio_task, qc, 0);
Albert Lee312f7da2005-09-27 17:38:03 +08004674
Albert Lee54f00382005-09-30 19:14:19 +08004675 /* if polling, ata_pio_task() handles the rest.
4676 * otherwise, interrupt handler takes over from here.
4677 */
Albert Lee312f7da2005-09-27 17:38:03 +08004678 }
4679
Linus Torvalds1da177e2005-04-16 15:20:36 -07004680 break;
4681
4682 case ATA_PROT_ATAPI:
Linus Torvalds1da177e2005-04-16 15:20:36 -07004683 case ATA_PROT_ATAPI_NODATA:
Albert Lee312f7da2005-09-27 17:38:03 +08004684 if (qc->tf.flags & ATA_TFLAG_POLLING)
4685 ata_qc_set_polling(qc);
4686
Jeff Garzike5338252005-10-30 21:37:17 -05004687 ata_tf_to_host(ap, &qc->tf);
Jeff Garzikf6ef65e2006-01-27 02:45:00 -05004688
Albert Lee312f7da2005-09-27 17:38:03 +08004689 ap->hsm_task_state = HSM_ST_FIRST;
4690
4691 /* send cdb by polling if no cdb interrupt */
4692 if ((!(qc->dev->flags & ATA_DFLAG_CDB_INTR)) ||
4693 (qc->tf.flags & ATA_TFLAG_POLLING))
Albert Lee31ce6da2006-04-03 18:31:44 +08004694 ata_port_queue_task(ap, ata_pio_task, qc, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004695 break;
4696
4697 case ATA_PROT_ATAPI_DMA:
Jeff Garzik587005d2006-02-11 18:17:32 -05004698 WARN_ON(qc->tf.flags & ATA_TFLAG_POLLING);
Albert Lee312f7da2005-09-27 17:38:03 +08004699
Linus Torvalds1da177e2005-04-16 15:20:36 -07004700 ap->ops->tf_load(ap, &qc->tf); /* load tf registers */
4701 ap->ops->bmdma_setup(qc); /* set up bmdma */
Albert Lee312f7da2005-09-27 17:38:03 +08004702 ap->hsm_task_state = HSM_ST_FIRST;
4703
4704 /* send cdb by polling if no cdb interrupt */
4705 if (!(qc->dev->flags & ATA_DFLAG_CDB_INTR))
Albert Lee31ce6da2006-04-03 18:31:44 +08004706 ata_port_queue_task(ap, ata_pio_task, qc, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004707 break;
4708
4709 default:
4710 WARN_ON(1);
Tejun Heo9a3d9eb2006-01-23 13:09:36 +09004711 return AC_ERR_SYSTEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004712 }
4713
4714 return 0;
4715}
4716
4717/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07004718 * ata_host_intr - Handle host interrupt for given (port, task)
4719 * @ap: Port on which interrupt arrived (possibly...)
4720 * @qc: Taskfile currently active in engine
4721 *
4722 * Handle host interrupt for given queued command. Currently,
4723 * only DMA interrupts are handled. All other commands are
4724 * handled via polling with interrupts disabled (nIEN bit).
4725 *
4726 * LOCKING:
4727 * spin_lock_irqsave(host_set lock)
4728 *
4729 * RETURNS:
4730 * One if interrupt was handled, zero if not (shared irq).
4731 */
4732
4733inline unsigned int ata_host_intr (struct ata_port *ap,
4734 struct ata_queued_cmd *qc)
4735{
Albert Lee312f7da2005-09-27 17:38:03 +08004736 u8 status, host_stat = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004737
Albert Lee312f7da2005-09-27 17:38:03 +08004738 VPRINTK("ata%u: protocol %d task_state %d\n",
4739 ap->id, qc->tf.protocol, ap->hsm_task_state);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004740
Albert Lee312f7da2005-09-27 17:38:03 +08004741 /* Check whether we are expecting interrupt in this state */
4742 switch (ap->hsm_task_state) {
4743 case HSM_ST_FIRST:
Albert Lee6912ccd2006-03-25 17:45:49 +08004744 /* Some pre-ATAPI-4 devices assert INTRQ
4745 * at this state when ready to receive CDB.
4746 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07004747
Albert Lee312f7da2005-09-27 17:38:03 +08004748 /* Check the ATA_DFLAG_CDB_INTR flag is enough here.
4749 * The flag was turned on only for atapi devices.
4750 * No need to check is_atapi_taskfile(&qc->tf) again.
4751 */
4752 if (!(qc->dev->flags & ATA_DFLAG_CDB_INTR))
Linus Torvalds1da177e2005-04-16 15:20:36 -07004753 goto idle_irq;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004754 break;
Albert Lee312f7da2005-09-27 17:38:03 +08004755 case HSM_ST_LAST:
4756 if (qc->tf.protocol == ATA_PROT_DMA ||
4757 qc->tf.protocol == ATA_PROT_ATAPI_DMA) {
4758 /* check status of DMA engine */
4759 host_stat = ap->ops->bmdma_status(ap);
4760 VPRINTK("ata%u: host_stat 0x%X\n", ap->id, host_stat);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004761
Albert Lee312f7da2005-09-27 17:38:03 +08004762 /* if it's not our irq... */
4763 if (!(host_stat & ATA_DMA_INTR))
4764 goto idle_irq;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004765
Albert Lee312f7da2005-09-27 17:38:03 +08004766 /* before we do anything else, clear DMA-Start bit */
4767 ap->ops->bmdma_stop(qc);
Albert Leea4f16612005-12-26 16:40:53 +08004768
4769 if (unlikely(host_stat & ATA_DMA_ERR)) {
4770 /* error when transfering data to/from memory */
4771 qc->err_mask |= AC_ERR_HOST_BUS;
4772 ap->hsm_task_state = HSM_ST_ERR;
4773 }
Albert Lee312f7da2005-09-27 17:38:03 +08004774 }
4775 break;
4776 case HSM_ST:
4777 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004778 default:
4779 goto idle_irq;
4780 }
4781
Albert Lee312f7da2005-09-27 17:38:03 +08004782 /* check altstatus */
4783 status = ata_altstatus(ap);
4784 if (status & ATA_BUSY)
4785 goto idle_irq;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004786
Albert Lee312f7da2005-09-27 17:38:03 +08004787 /* check main status, clearing INTRQ */
4788 status = ata_chk_status(ap);
4789 if (unlikely(status & ATA_BUSY))
4790 goto idle_irq;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004791
Albert Lee312f7da2005-09-27 17:38:03 +08004792 /* ack bmdma irq events */
4793 ap->ops->irq_clear(ap);
4794
Albert Leebb5cb292006-03-25 17:48:02 +08004795 ata_hsm_move(ap, qc, status, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004796 return 1; /* irq handled */
4797
4798idle_irq:
4799 ap->stats.idle_irq++;
4800
4801#ifdef ATA_IRQ_TRAP
4802 if ((ap->stats.idle_irq % 1000) == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07004803 ata_irq_ack(ap, 0); /* debug trap */
Tejun Heof15a1da2006-05-15 20:57:56 +09004804 ata_port_printk(ap, KERN_WARNING, "irq trap\n");
Alan Cox23cfce82006-03-21 16:06:53 +00004805 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004806 }
4807#endif
4808 return 0; /* irq not handled */
4809}
4810
4811/**
4812 * ata_interrupt - Default ATA host interrupt handler
Jeff Garzik0cba6322005-05-30 19:49:12 -04004813 * @irq: irq line (unused)
4814 * @dev_instance: pointer to our ata_host_set information structure
Linus Torvalds1da177e2005-04-16 15:20:36 -07004815 * @regs: unused
4816 *
Jeff Garzik0cba6322005-05-30 19:49:12 -04004817 * Default interrupt handler for PCI IDE devices. Calls
4818 * ata_host_intr() for each port that is not disabled.
4819 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07004820 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04004821 * Obtains host_set lock during operation.
Linus Torvalds1da177e2005-04-16 15:20:36 -07004822 *
4823 * RETURNS:
Jeff Garzik0cba6322005-05-30 19:49:12 -04004824 * IRQ_NONE or IRQ_HANDLED.
Linus Torvalds1da177e2005-04-16 15:20:36 -07004825 */
4826
4827irqreturn_t ata_interrupt (int irq, void *dev_instance, struct pt_regs *regs)
4828{
4829 struct ata_host_set *host_set = dev_instance;
4830 unsigned int i;
4831 unsigned int handled = 0;
4832 unsigned long flags;
4833
4834 /* TODO: make _irqsave conditional on x86 PCI IDE legacy mode */
4835 spin_lock_irqsave(&host_set->lock, flags);
4836
4837 for (i = 0; i < host_set->n_ports; i++) {
4838 struct ata_port *ap;
4839
4840 ap = host_set->ports[i];
Tejun Heoc1389502005-08-22 14:59:24 +09004841 if (ap &&
Jeff Garzik029f5462006-04-02 10:30:40 -04004842 !(ap->flags & ATA_FLAG_DISABLED)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07004843 struct ata_queued_cmd *qc;
4844
4845 qc = ata_qc_from_tag(ap, ap->active_tag);
Albert Lee312f7da2005-09-27 17:38:03 +08004846 if (qc && (!(qc->tf.flags & ATA_TFLAG_POLLING)) &&
Albert Lee21b1ed72005-04-29 17:34:59 +08004847 (qc->flags & ATA_QCFLAG_ACTIVE))
Linus Torvalds1da177e2005-04-16 15:20:36 -07004848 handled |= ata_host_intr(ap, qc);
4849 }
4850 }
4851
4852 spin_unlock_irqrestore(&host_set->lock, flags);
4853
4854 return IRQ_RETVAL(handled);
4855}
4856
Tejun Heo34bf2172006-05-15 20:57:46 +09004857/**
4858 * sata_scr_valid - test whether SCRs are accessible
4859 * @ap: ATA port to test SCR accessibility for
4860 *
4861 * Test whether SCRs are accessible for @ap.
4862 *
4863 * LOCKING:
4864 * None.
4865 *
4866 * RETURNS:
4867 * 1 if SCRs are accessible, 0 otherwise.
4868 */
4869int sata_scr_valid(struct ata_port *ap)
4870{
4871 return ap->cbl == ATA_CBL_SATA && ap->ops->scr_read;
4872}
4873
4874/**
4875 * sata_scr_read - read SCR register of the specified port
4876 * @ap: ATA port to read SCR for
4877 * @reg: SCR to read
4878 * @val: Place to store read value
4879 *
4880 * Read SCR register @reg of @ap into *@val. This function is
4881 * guaranteed to succeed if the cable type of the port is SATA
4882 * and the port implements ->scr_read.
4883 *
4884 * LOCKING:
4885 * None.
4886 *
4887 * RETURNS:
4888 * 0 on success, negative errno on failure.
4889 */
4890int sata_scr_read(struct ata_port *ap, int reg, u32 *val)
4891{
4892 if (sata_scr_valid(ap)) {
4893 *val = ap->ops->scr_read(ap, reg);
4894 return 0;
4895 }
4896 return -EOPNOTSUPP;
4897}
4898
4899/**
4900 * sata_scr_write - write SCR register of the specified port
4901 * @ap: ATA port to write SCR for
4902 * @reg: SCR to write
4903 * @val: value to write
4904 *
4905 * Write @val to SCR register @reg of @ap. This function is
4906 * guaranteed to succeed if the cable type of the port is SATA
4907 * and the port implements ->scr_read.
4908 *
4909 * LOCKING:
4910 * None.
4911 *
4912 * RETURNS:
4913 * 0 on success, negative errno on failure.
4914 */
4915int sata_scr_write(struct ata_port *ap, int reg, u32 val)
4916{
4917 if (sata_scr_valid(ap)) {
4918 ap->ops->scr_write(ap, reg, val);
4919 return 0;
4920 }
4921 return -EOPNOTSUPP;
4922}
4923
4924/**
4925 * sata_scr_write_flush - write SCR register of the specified port and flush
4926 * @ap: ATA port to write SCR for
4927 * @reg: SCR to write
4928 * @val: value to write
4929 *
4930 * This function is identical to sata_scr_write() except that this
4931 * function performs flush after writing to the register.
4932 *
4933 * LOCKING:
4934 * None.
4935 *
4936 * RETURNS:
4937 * 0 on success, negative errno on failure.
4938 */
4939int sata_scr_write_flush(struct ata_port *ap, int reg, u32 val)
4940{
4941 if (sata_scr_valid(ap)) {
4942 ap->ops->scr_write(ap, reg, val);
4943 ap->ops->scr_read(ap, reg);
4944 return 0;
4945 }
4946 return -EOPNOTSUPP;
4947}
4948
4949/**
4950 * ata_port_online - test whether the given port is online
4951 * @ap: ATA port to test
4952 *
4953 * Test whether @ap is online. Note that this function returns 0
4954 * if online status of @ap cannot be obtained, so
4955 * ata_port_online(ap) != !ata_port_offline(ap).
4956 *
4957 * LOCKING:
4958 * None.
4959 *
4960 * RETURNS:
4961 * 1 if the port online status is available and online.
4962 */
4963int ata_port_online(struct ata_port *ap)
4964{
4965 u32 sstatus;
4966
4967 if (!sata_scr_read(ap, SCR_STATUS, &sstatus) && (sstatus & 0xf) == 0x3)
4968 return 1;
4969 return 0;
4970}
4971
4972/**
4973 * ata_port_offline - test whether the given port is offline
4974 * @ap: ATA port to test
4975 *
4976 * Test whether @ap is offline. Note that this function returns
4977 * 0 if offline status of @ap cannot be obtained, so
4978 * ata_port_online(ap) != !ata_port_offline(ap).
4979 *
4980 * LOCKING:
4981 * None.
4982 *
4983 * RETURNS:
4984 * 1 if the port offline status is available and offline.
4985 */
4986int ata_port_offline(struct ata_port *ap)
4987{
4988 u32 sstatus;
4989
4990 if (!sata_scr_read(ap, SCR_STATUS, &sstatus) && (sstatus & 0xf) != 0x3)
4991 return 1;
4992 return 0;
4993}
Edward Falk0baab862005-06-02 18:17:13 -04004994
Tejun Heo77b08fb2006-06-24 20:30:19 +09004995int ata_flush_cache(struct ata_device *dev)
Jens Axboe9b847542006-01-06 09:28:07 +01004996{
Tejun Heo977e6b92006-06-24 20:30:19 +09004997 unsigned int err_mask;
Jens Axboe9b847542006-01-06 09:28:07 +01004998 u8 cmd;
4999
5000 if (!ata_try_flush_cache(dev))
5001 return 0;
5002
5003 if (ata_id_has_flush_ext(dev->id))
5004 cmd = ATA_CMD_FLUSH_EXT;
5005 else
5006 cmd = ATA_CMD_FLUSH;
5007
Tejun Heo977e6b92006-06-24 20:30:19 +09005008 err_mask = ata_do_simple_cmd(dev, cmd);
5009 if (err_mask) {
5010 ata_dev_printk(dev, KERN_ERR, "failed to flush cache\n");
5011 return -EIO;
5012 }
5013
5014 return 0;
Jens Axboe9b847542006-01-06 09:28:07 +01005015}
5016
Tejun Heo500530f2006-07-03 16:07:27 +09005017static int ata_host_set_request_pm(struct ata_host_set *host_set,
5018 pm_message_t mesg, unsigned int action,
5019 unsigned int ehi_flags, int wait)
5020{
5021 unsigned long flags;
5022 int i, rc;
5023
5024 for (i = 0; i < host_set->n_ports; i++) {
5025 struct ata_port *ap = host_set->ports[i];
5026
5027 /* Previous resume operation might still be in
5028 * progress. Wait for PM_PENDING to clear.
5029 */
5030 if (ap->pflags & ATA_PFLAG_PM_PENDING) {
5031 ata_port_wait_eh(ap);
5032 WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING);
5033 }
5034
5035 /* request PM ops to EH */
5036 spin_lock_irqsave(ap->lock, flags);
5037
5038 ap->pm_mesg = mesg;
5039 if (wait) {
5040 rc = 0;
5041 ap->pm_result = &rc;
5042 }
5043
5044 ap->pflags |= ATA_PFLAG_PM_PENDING;
5045 ap->eh_info.action |= action;
5046 ap->eh_info.flags |= ehi_flags;
5047
5048 ata_port_schedule_eh(ap);
5049
5050 spin_unlock_irqrestore(ap->lock, flags);
5051
5052 /* wait and check result */
5053 if (wait) {
5054 ata_port_wait_eh(ap);
5055 WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING);
5056 if (rc)
5057 return rc;
5058 }
5059 }
5060
5061 return 0;
5062}
5063
5064/**
5065 * ata_host_set_suspend - suspend host_set
5066 * @host_set: host_set to suspend
5067 * @mesg: PM message
5068 *
5069 * Suspend @host_set. Actual operation is performed by EH. This
5070 * function requests EH to perform PM operations and waits for EH
5071 * to finish.
5072 *
5073 * LOCKING:
5074 * Kernel thread context (may sleep).
5075 *
5076 * RETURNS:
5077 * 0 on success, -errno on failure.
5078 */
5079int ata_host_set_suspend(struct ata_host_set *host_set, pm_message_t mesg)
5080{
5081 int i, j, rc;
5082
5083 rc = ata_host_set_request_pm(host_set, mesg, 0, ATA_EHI_QUIET, 1);
5084 if (rc)
5085 goto fail;
5086
5087 /* EH is quiescent now. Fail if we have any ready device.
5088 * This happens if hotplug occurs between completion of device
5089 * suspension and here.
5090 */
5091 for (i = 0; i < host_set->n_ports; i++) {
5092 struct ata_port *ap = host_set->ports[i];
5093
5094 for (j = 0; j < ATA_MAX_DEVICES; j++) {
5095 struct ata_device *dev = &ap->device[j];
5096
5097 if (ata_dev_ready(dev)) {
5098 ata_port_printk(ap, KERN_WARNING,
5099 "suspend failed, device %d "
5100 "still active\n", dev->devno);
5101 rc = -EBUSY;
5102 goto fail;
5103 }
5104 }
5105 }
5106
5107 host_set->dev->power.power_state = mesg;
5108 return 0;
5109
5110 fail:
5111 ata_host_set_resume(host_set);
5112 return rc;
5113}
5114
5115/**
5116 * ata_host_set_resume - resume host_set
5117 * @host_set: host_set to resume
5118 *
5119 * Resume @host_set. Actual operation is performed by EH. This
5120 * function requests EH to perform PM operations and returns.
5121 * Note that all resume operations are performed parallely.
5122 *
5123 * LOCKING:
5124 * Kernel thread context (may sleep).
5125 */
5126void ata_host_set_resume(struct ata_host_set *host_set)
5127{
5128 ata_host_set_request_pm(host_set, PMSG_ON, ATA_EH_SOFTRESET,
5129 ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET, 0);
5130 host_set->dev->power.power_state = PMSG_ON;
5131}
5132
Randy Dunlapc893a3a2006-01-28 13:15:32 -05005133/**
5134 * ata_port_start - Set port up for dma.
5135 * @ap: Port to initialize
5136 *
5137 * Called just after data structures for each port are
5138 * initialized. Allocates space for PRD table.
5139 *
5140 * May be used as the port_start() entry in ata_port_operations.
5141 *
5142 * LOCKING:
5143 * Inherited from caller.
5144 */
5145
Linus Torvalds1da177e2005-04-16 15:20:36 -07005146int ata_port_start (struct ata_port *ap)
5147{
Brian King2f1f6102006-03-23 17:30:15 -06005148 struct device *dev = ap->dev;
Jeff Garzik6037d6b2005-11-04 22:08:00 -05005149 int rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005150
5151 ap->prd = dma_alloc_coherent(dev, ATA_PRD_TBL_SZ, &ap->prd_dma, GFP_KERNEL);
5152 if (!ap->prd)
5153 return -ENOMEM;
5154
Jeff Garzik6037d6b2005-11-04 22:08:00 -05005155 rc = ata_pad_alloc(ap, dev);
5156 if (rc) {
Jeff Garzikcedc9a42005-10-05 07:13:30 -04005157 dma_free_coherent(dev, ATA_PRD_TBL_SZ, ap->prd, ap->prd_dma);
Jeff Garzik6037d6b2005-11-04 22:08:00 -05005158 return rc;
Jeff Garzikcedc9a42005-10-05 07:13:30 -04005159 }
5160
Linus Torvalds1da177e2005-04-16 15:20:36 -07005161 DPRINTK("prd alloc, virt %p, dma %llx\n", ap->prd, (unsigned long long) ap->prd_dma);
5162
5163 return 0;
5164}
5165
Edward Falk0baab862005-06-02 18:17:13 -04005166
5167/**
5168 * ata_port_stop - Undo ata_port_start()
5169 * @ap: Port to shut down
5170 *
5171 * Frees the PRD table.
5172 *
5173 * May be used as the port_stop() entry in ata_port_operations.
5174 *
5175 * LOCKING:
Randy Dunlap6f0ef4f2005-10-25 01:44:30 -04005176 * Inherited from caller.
Edward Falk0baab862005-06-02 18:17:13 -04005177 */
5178
Linus Torvalds1da177e2005-04-16 15:20:36 -07005179void ata_port_stop (struct ata_port *ap)
5180{
Brian King2f1f6102006-03-23 17:30:15 -06005181 struct device *dev = ap->dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005182
5183 dma_free_coherent(dev, ATA_PRD_TBL_SZ, ap->prd, ap->prd_dma);
Jeff Garzik6037d6b2005-11-04 22:08:00 -05005184 ata_pad_free(ap, dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005185}
5186
Jeff Garzikaa8f0dc2005-05-26 21:54:27 -04005187void ata_host_stop (struct ata_host_set *host_set)
5188{
5189 if (host_set->mmio_base)
5190 iounmap(host_set->mmio_base);
5191}
5192
Linus Torvalds1da177e2005-04-16 15:20:36 -07005193/**
Tejun Heo3ef3b432006-05-31 18:27:30 +09005194 * ata_dev_init - Initialize an ata_device structure
5195 * @dev: Device structure to initialize
5196 *
5197 * Initialize @dev in preparation for probing.
5198 *
5199 * LOCKING:
5200 * Inherited from caller.
5201 */
5202void ata_dev_init(struct ata_device *dev)
5203{
5204 struct ata_port *ap = dev->ap;
Tejun Heo72fa4b72006-05-31 18:27:32 +09005205 unsigned long flags;
Tejun Heo3ef3b432006-05-31 18:27:30 +09005206
Tejun Heo5a04bf42006-05-31 18:27:38 +09005207 /* SATA spd limit is bound to the first device */
5208 ap->sata_spd_limit = ap->hw_sata_spd_limit;
5209
Tejun Heo72fa4b72006-05-31 18:27:32 +09005210 /* High bits of dev->flags are used to record warm plug
5211 * requests which occur asynchronously. Synchronize using
5212 * host_set lock.
5213 */
Jeff Garzikba6a1302006-06-22 23:46:10 -04005214 spin_lock_irqsave(ap->lock, flags);
Tejun Heo72fa4b72006-05-31 18:27:32 +09005215 dev->flags &= ~ATA_DFLAG_INIT_MASK;
Jeff Garzikba6a1302006-06-22 23:46:10 -04005216 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heo72fa4b72006-05-31 18:27:32 +09005217
5218 memset((void *)dev + ATA_DEVICE_CLEAR_OFFSET, 0,
5219 sizeof(*dev) - ATA_DEVICE_CLEAR_OFFSET);
Tejun Heo3ef3b432006-05-31 18:27:30 +09005220 dev->pio_mask = UINT_MAX;
5221 dev->mwdma_mask = UINT_MAX;
5222 dev->udma_mask = UINT_MAX;
5223}
5224
5225/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07005226 * ata_host_init - Initialize an ata_port structure
5227 * @ap: Structure to initialize
5228 * @host: associated SCSI mid-layer structure
5229 * @host_set: Collection of hosts to which @ap belongs
5230 * @ent: Probe information provided by low-level driver
5231 * @port_no: Port number associated with this ata_port
5232 *
Jeff Garzik0cba6322005-05-30 19:49:12 -04005233 * Initialize a new ata_port structure, and its associated
5234 * scsi_host.
5235 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07005236 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04005237 * Inherited from caller.
Linus Torvalds1da177e2005-04-16 15:20:36 -07005238 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07005239static void ata_host_init(struct ata_port *ap, struct Scsi_Host *host,
5240 struct ata_host_set *host_set,
Jeff Garzik057ace52005-10-22 14:27:05 -04005241 const struct ata_probe_ent *ent, unsigned int port_no)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005242{
5243 unsigned int i;
5244
5245 host->max_id = 16;
5246 host->max_lun = 1;
5247 host->max_channel = 1;
5248 host->unique_id = ata_unique_id++;
5249 host->max_cmd_len = 12;
Christoph Hellwig12413192005-06-11 01:05:01 +02005250
Jeff Garzikba6a1302006-06-22 23:46:10 -04005251 ap->lock = &host_set->lock;
Tejun Heo198e0fe2006-04-02 18:51:52 +09005252 ap->flags = ATA_FLAG_DISABLED;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005253 ap->id = host->unique_id;
5254 ap->host = host;
5255 ap->ctl = ATA_DEVCTL_OBS;
5256 ap->host_set = host_set;
Brian King2f1f6102006-03-23 17:30:15 -06005257 ap->dev = ent->dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005258 ap->port_no = port_no;
5259 ap->hard_port_no =
5260 ent->legacy_mode ? ent->hard_port_no : port_no;
5261 ap->pio_mask = ent->pio_mask;
5262 ap->mwdma_mask = ent->mwdma_mask;
5263 ap->udma_mask = ent->udma_mask;
5264 ap->flags |= ent->host_flags;
5265 ap->ops = ent->port_ops;
Tejun Heo5a04bf42006-05-31 18:27:38 +09005266 ap->hw_sata_spd_limit = UINT_MAX;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005267 ap->active_tag = ATA_TAG_POISON;
5268 ap->last_ctl = 0xFF;
Borislav Petkovbd5d8252006-06-11 23:17:01 -04005269
5270#if defined(ATA_VERBOSE_DEBUG)
5271 /* turn on all debugging levels */
5272 ap->msg_enable = 0x00FF;
5273#elif defined(ATA_DEBUG)
5274 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 +09005275#else
Borislav Petkov0dd4b212006-06-23 02:29:08 -04005276 ap->msg_enable = ATA_MSG_DRV | ATA_MSG_ERR | ATA_MSG_WARN;
Borislav Petkovbd5d8252006-06-11 23:17:01 -04005277#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07005278
Tejun Heo86e45b62006-03-05 15:29:09 +09005279 INIT_WORK(&ap->port_task, NULL, NULL);
Tejun Heo580b21022006-05-31 18:28:05 +09005280 INIT_WORK(&ap->hotplug_task, ata_scsi_hotplug, ap);
zhao, forrest3057ac32006-06-12 12:01:34 +08005281 INIT_WORK(&ap->scsi_rescan_task, ata_scsi_dev_rescan, ap);
Tejun Heoa72ec4c2006-01-23 13:09:37 +09005282 INIT_LIST_HEAD(&ap->eh_done_q);
Tejun Heoc6cf9e92006-05-31 18:27:27 +09005283 init_waitqueue_head(&ap->eh_wait_q);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005284
Tejun Heo838df622006-05-15 20:57:44 +09005285 /* set cable type */
5286 ap->cbl = ATA_CBL_NONE;
5287 if (ap->flags & ATA_FLAG_SATA)
5288 ap->cbl = ATA_CBL_SATA;
5289
Tejun Heoacf356b2006-03-24 14:07:50 +09005290 for (i = 0; i < ATA_MAX_DEVICES; i++) {
5291 struct ata_device *dev = &ap->device[i];
Tejun Heo38d87232006-05-15 20:57:51 +09005292 dev->ap = ap;
Tejun Heo72fa4b72006-05-31 18:27:32 +09005293 dev->devno = i;
Tejun Heo3ef3b432006-05-31 18:27:30 +09005294 ata_dev_init(dev);
Tejun Heoacf356b2006-03-24 14:07:50 +09005295 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07005296
5297#ifdef ATA_IRQ_TRAP
5298 ap->stats.unhandled_irq = 1;
5299 ap->stats.idle_irq = 1;
5300#endif
5301
5302 memcpy(&ap->ioaddr, &ent->port[port_no], sizeof(struct ata_ioports));
5303}
5304
5305/**
5306 * ata_host_add - Attach low-level ATA driver to system
5307 * @ent: Information provided by low-level driver
5308 * @host_set: Collections of ports to which we add
5309 * @port_no: Port number associated with this host
5310 *
Jeff Garzik0cba6322005-05-30 19:49:12 -04005311 * Attach low-level ATA driver to system.
5312 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07005313 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04005314 * PCI/etc. bus probe sem.
Linus Torvalds1da177e2005-04-16 15:20:36 -07005315 *
5316 * RETURNS:
Jeff Garzik0cba6322005-05-30 19:49:12 -04005317 * New ata_port on success, for NULL on error.
Linus Torvalds1da177e2005-04-16 15:20:36 -07005318 */
5319
Jeff Garzik057ace52005-10-22 14:27:05 -04005320static struct ata_port * ata_host_add(const struct ata_probe_ent *ent,
Linus Torvalds1da177e2005-04-16 15:20:36 -07005321 struct ata_host_set *host_set,
5322 unsigned int port_no)
5323{
5324 struct Scsi_Host *host;
5325 struct ata_port *ap;
5326 int rc;
5327
5328 DPRINTK("ENTER\n");
Tejun Heoaec5c3c2006-03-25 01:33:34 +09005329
Tejun Heo52783c52006-05-31 18:28:22 +09005330 if (!ent->port_ops->error_handler &&
Tejun Heoaec5c3c2006-03-25 01:33:34 +09005331 !(ent->host_flags & (ATA_FLAG_SATA_RESET | ATA_FLAG_SRST))) {
5332 printk(KERN_ERR "ata%u: no reset mechanism available\n",
5333 port_no);
5334 return NULL;
5335 }
5336
Linus Torvalds1da177e2005-04-16 15:20:36 -07005337 host = scsi_host_alloc(ent->sht, sizeof(struct ata_port));
5338 if (!host)
5339 return NULL;
5340
Tejun Heo30afc842006-03-18 18:40:14 +09005341 host->transportt = &ata_scsi_transport_template;
5342
Jeff Garzik35bb94b2006-04-11 13:12:34 -04005343 ap = ata_shost_to_port(host);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005344
5345 ata_host_init(ap, host, host_set, ent, port_no);
5346
5347 rc = ap->ops->port_start(ap);
5348 if (rc)
5349 goto err_out;
5350
5351 return ap;
5352
5353err_out:
5354 scsi_host_put(host);
5355 return NULL;
5356}
5357
5358/**
Jeff Garzik0cba6322005-05-30 19:49:12 -04005359 * ata_device_add - Register hardware device with ATA and SCSI layers
5360 * @ent: Probe information describing hardware device to be registered
5361 *
5362 * This function processes the information provided in the probe
5363 * information struct @ent, allocates the necessary ATA and SCSI
5364 * host information structures, initializes them, and registers
5365 * everything with requisite kernel subsystems.
5366 *
5367 * This function requests irqs, probes the ATA bus, and probes
5368 * the SCSI bus.
Linus Torvalds1da177e2005-04-16 15:20:36 -07005369 *
5370 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04005371 * PCI/etc. bus probe sem.
Linus Torvalds1da177e2005-04-16 15:20:36 -07005372 *
5373 * RETURNS:
Jeff Garzik0cba6322005-05-30 19:49:12 -04005374 * Number of ports registered. Zero on error (no ports registered).
Linus Torvalds1da177e2005-04-16 15:20:36 -07005375 */
Jeff Garzik057ace52005-10-22 14:27:05 -04005376int ata_device_add(const struct ata_probe_ent *ent)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005377{
5378 unsigned int count = 0, i;
5379 struct device *dev = ent->dev;
5380 struct ata_host_set *host_set;
Jeff Garzik39b07ce2006-06-11 23:59:44 -04005381 int rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005382
5383 DPRINTK("ENTER\n");
5384 /* alloc a container for our list of ATA ports (buses) */
Randy Dunlap57f3bda2005-10-28 20:37:23 -07005385 host_set = kzalloc(sizeof(struct ata_host_set) +
Linus Torvalds1da177e2005-04-16 15:20:36 -07005386 (ent->n_ports * sizeof(void *)), GFP_KERNEL);
5387 if (!host_set)
5388 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005389 spin_lock_init(&host_set->lock);
5390
5391 host_set->dev = dev;
5392 host_set->n_ports = ent->n_ports;
5393 host_set->irq = ent->irq;
5394 host_set->mmio_base = ent->mmio_base;
5395 host_set->private_data = ent->private_data;
5396 host_set->ops = ent->port_ops;
Alan Cox5444a6f2006-03-27 18:58:20 +01005397 host_set->flags = ent->host_set_flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005398
5399 /* register each port bound to this device */
5400 for (i = 0; i < ent->n_ports; i++) {
5401 struct ata_port *ap;
5402 unsigned long xfer_mode_mask;
5403
5404 ap = ata_host_add(ent, host_set, i);
5405 if (!ap)
5406 goto err_out;
5407
5408 host_set->ports[i] = ap;
5409 xfer_mode_mask =(ap->udma_mask << ATA_SHIFT_UDMA) |
5410 (ap->mwdma_mask << ATA_SHIFT_MWDMA) |
5411 (ap->pio_mask << ATA_SHIFT_PIO);
5412
5413 /* print per-port info to dmesg */
Tejun Heof15a1da2006-05-15 20:57:56 +09005414 ata_port_printk(ap, KERN_INFO, "%cATA max %s cmd 0x%lX "
5415 "ctl 0x%lX bmdma 0x%lX irq %lu\n",
5416 ap->flags & ATA_FLAG_SATA ? 'S' : 'P',
5417 ata_mode_string(xfer_mode_mask),
5418 ap->ioaddr.cmd_addr,
5419 ap->ioaddr.ctl_addr,
5420 ap->ioaddr.bmdma_addr,
5421 ent->irq);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005422
5423 ata_chk_status(ap);
5424 host_set->ops->irq_clear(ap);
Tejun Heoe3180492006-05-15 20:58:09 +09005425 ata_eh_freeze_port(ap); /* freeze port before requesting IRQ */
Linus Torvalds1da177e2005-04-16 15:20:36 -07005426 count++;
5427 }
5428
Randy Dunlap57f3bda2005-10-28 20:37:23 -07005429 if (!count)
5430 goto err_free_ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005431
5432 /* obtain irq, that is shared between channels */
Jeff Garzik39b07ce2006-06-11 23:59:44 -04005433 rc = request_irq(ent->irq, ent->port_ops->irq_handler, ent->irq_flags,
5434 DRV_NAME, host_set);
5435 if (rc) {
5436 dev_printk(KERN_ERR, dev, "irq %lu request failed: %d\n",
5437 ent->irq, rc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005438 goto err_out;
Jeff Garzik39b07ce2006-06-11 23:59:44 -04005439 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07005440
5441 /* perform each probe synchronously */
5442 DPRINTK("probe begin\n");
5443 for (i = 0; i < count; i++) {
5444 struct ata_port *ap;
Tejun Heo5a04bf42006-05-31 18:27:38 +09005445 u32 scontrol;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005446 int rc;
5447
5448 ap = host_set->ports[i];
5449
Tejun Heo5a04bf42006-05-31 18:27:38 +09005450 /* init sata_spd_limit to the current value */
5451 if (sata_scr_read(ap, SCR_CONTROL, &scontrol) == 0) {
5452 int spd = (scontrol >> 4) & 0xf;
5453 ap->hw_sata_spd_limit &= (1 << spd) - 1;
5454 }
5455 ap->sata_spd_limit = ap->hw_sata_spd_limit;
5456
Linus Torvalds1da177e2005-04-16 15:20:36 -07005457 rc = scsi_add_host(ap->host, dev);
5458 if (rc) {
Tejun Heof15a1da2006-05-15 20:57:56 +09005459 ata_port_printk(ap, KERN_ERR, "scsi_add_host failed\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07005460 /* FIXME: do something useful here */
5461 /* FIXME: handle unconditional calls to
5462 * scsi_scan_host and ata_host_remove, below,
5463 * at the very least
5464 */
5465 }
Tejun Heo3e706392006-05-31 18:28:11 +09005466
Tejun Heo52783c52006-05-31 18:28:22 +09005467 if (ap->ops->error_handler) {
Tejun Heo1cdaf532006-07-03 16:07:26 +09005468 struct ata_eh_info *ehi = &ap->eh_info;
Tejun Heo3e706392006-05-31 18:28:11 +09005469 unsigned long flags;
5470
5471 ata_port_probe(ap);
5472
5473 /* kick EH for boot probing */
Jeff Garzikba6a1302006-06-22 23:46:10 -04005474 spin_lock_irqsave(ap->lock, flags);
Tejun Heo3e706392006-05-31 18:28:11 +09005475
Tejun Heo1cdaf532006-07-03 16:07:26 +09005476 ehi->probe_mask = (1 << ATA_MAX_DEVICES) - 1;
5477 ehi->action |= ATA_EH_SOFTRESET;
5478 ehi->flags |= ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET;
Tejun Heo3e706392006-05-31 18:28:11 +09005479
Tejun Heob51e9e52006-06-29 01:29:30 +09005480 ap->pflags |= ATA_PFLAG_LOADING;
Tejun Heo3e706392006-05-31 18:28:11 +09005481 ata_port_schedule_eh(ap);
5482
Jeff Garzikba6a1302006-06-22 23:46:10 -04005483 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heo3e706392006-05-31 18:28:11 +09005484
5485 /* wait for EH to finish */
5486 ata_port_wait_eh(ap);
5487 } else {
5488 DPRINTK("ata%u: bus probe begin\n", ap->id);
5489 rc = ata_bus_probe(ap);
5490 DPRINTK("ata%u: bus probe end\n", ap->id);
5491
5492 if (rc) {
5493 /* FIXME: do something useful here?
5494 * Current libata behavior will
5495 * tear down everything when
5496 * the module is removed
5497 * or the h/w is unplugged.
5498 */
5499 }
5500 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07005501 }
5502
5503 /* probes are done, now scan each port's disk(s) */
Randy Dunlapc893a3a2006-01-28 13:15:32 -05005504 DPRINTK("host probe begin\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07005505 for (i = 0; i < count; i++) {
5506 struct ata_port *ap = host_set->ports[i];
5507
Jeff Garzik644dd0c2005-10-03 15:55:19 -04005508 ata_scsi_scan_host(ap);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005509 }
5510
5511 dev_set_drvdata(dev, host_set);
5512
5513 VPRINTK("EXIT, returning %u\n", ent->n_ports);
5514 return ent->n_ports; /* success */
5515
5516err_out:
5517 for (i = 0; i < count; i++) {
Jeff Garzik6543bc02006-08-05 03:59:17 +09005518 struct ata_port *ap = host_set->ports[i];
Tejun Heo77f3f872006-08-05 03:59:19 +09005519 if (ap) {
5520 ap->ops->port_stop(ap);
5521 scsi_host_put(ap->host);
5522 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07005523 }
Randy Dunlap57f3bda2005-10-28 20:37:23 -07005524err_free_ret:
Linus Torvalds1da177e2005-04-16 15:20:36 -07005525 kfree(host_set);
5526 VPRINTK("EXIT, returning 0\n");
5527 return 0;
5528}
5529
5530/**
Tejun Heo720ba122006-05-31 18:28:13 +09005531 * ata_port_detach - Detach ATA port in prepration of device removal
5532 * @ap: ATA port to be detached
5533 *
5534 * Detach all ATA devices and the associated SCSI devices of @ap;
5535 * then, remove the associated SCSI host. @ap is guaranteed to
5536 * be quiescent on return from this function.
5537 *
5538 * LOCKING:
5539 * Kernel thread context (may sleep).
5540 */
5541void ata_port_detach(struct ata_port *ap)
5542{
5543 unsigned long flags;
5544 int i;
5545
5546 if (!ap->ops->error_handler)
Tejun Heoc3cf30a2006-08-05 03:59:11 +09005547 goto skip_eh;
Tejun Heo720ba122006-05-31 18:28:13 +09005548
5549 /* tell EH we're leaving & flush EH */
Jeff Garzikba6a1302006-06-22 23:46:10 -04005550 spin_lock_irqsave(ap->lock, flags);
Tejun Heob51e9e52006-06-29 01:29:30 +09005551 ap->pflags |= ATA_PFLAG_UNLOADING;
Jeff Garzikba6a1302006-06-22 23:46:10 -04005552 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heo720ba122006-05-31 18:28:13 +09005553
5554 ata_port_wait_eh(ap);
5555
5556 /* EH is now guaranteed to see UNLOADING, so no new device
5557 * will be attached. Disable all existing devices.
5558 */
Jeff Garzikba6a1302006-06-22 23:46:10 -04005559 spin_lock_irqsave(ap->lock, flags);
Tejun Heo720ba122006-05-31 18:28:13 +09005560
5561 for (i = 0; i < ATA_MAX_DEVICES; i++)
5562 ata_dev_disable(&ap->device[i]);
5563
Jeff Garzikba6a1302006-06-22 23:46:10 -04005564 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heo720ba122006-05-31 18:28:13 +09005565
5566 /* Final freeze & EH. All in-flight commands are aborted. EH
5567 * will be skipped and retrials will be terminated with bad
5568 * target.
5569 */
Jeff Garzikba6a1302006-06-22 23:46:10 -04005570 spin_lock_irqsave(ap->lock, flags);
Tejun Heo720ba122006-05-31 18:28:13 +09005571 ata_port_freeze(ap); /* won't be thawed */
Jeff Garzikba6a1302006-06-22 23:46:10 -04005572 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heo720ba122006-05-31 18:28:13 +09005573
5574 ata_port_wait_eh(ap);
5575
5576 /* Flush hotplug task. The sequence is similar to
5577 * ata_port_flush_task().
5578 */
5579 flush_workqueue(ata_aux_wq);
5580 cancel_delayed_work(&ap->hotplug_task);
5581 flush_workqueue(ata_aux_wq);
5582
Tejun Heoc3cf30a2006-08-05 03:59:11 +09005583 skip_eh:
Tejun Heo720ba122006-05-31 18:28:13 +09005584 /* remove the associated SCSI host */
5585 scsi_remove_host(ap->host);
5586}
5587
5588/**
Alan Cox17b14452005-09-15 15:44:00 +01005589 * ata_host_set_remove - PCI layer callback for device removal
5590 * @host_set: ATA host set that was removed
5591 *
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05005592 * Unregister all objects associated with this host set. Free those
Alan Cox17b14452005-09-15 15:44:00 +01005593 * objects.
5594 *
5595 * LOCKING:
5596 * Inherited from calling layer (may sleep).
5597 */
5598
Alan Cox17b14452005-09-15 15:44:00 +01005599void ata_host_set_remove(struct ata_host_set *host_set)
5600{
Alan Cox17b14452005-09-15 15:44:00 +01005601 unsigned int i;
5602
Tejun Heo720ba122006-05-31 18:28:13 +09005603 for (i = 0; i < host_set->n_ports; i++)
5604 ata_port_detach(host_set->ports[i]);
Alan Cox17b14452005-09-15 15:44:00 +01005605
5606 free_irq(host_set->irq, host_set);
5607
5608 for (i = 0; i < host_set->n_ports; i++) {
Tejun Heo720ba122006-05-31 18:28:13 +09005609 struct ata_port *ap = host_set->ports[i];
Alan Cox17b14452005-09-15 15:44:00 +01005610
5611 ata_scsi_release(ap->host);
5612
5613 if ((ap->flags & ATA_FLAG_NO_LEGACY) == 0) {
5614 struct ata_ioports *ioaddr = &ap->ioaddr;
5615
5616 if (ioaddr->cmd_addr == 0x1f0)
5617 release_region(0x1f0, 8);
5618 else if (ioaddr->cmd_addr == 0x170)
5619 release_region(0x170, 8);
5620 }
5621
5622 scsi_host_put(ap->host);
5623 }
5624
5625 if (host_set->ops->host_stop)
5626 host_set->ops->host_stop(host_set);
5627
5628 kfree(host_set);
5629}
5630
5631/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07005632 * ata_scsi_release - SCSI layer callback hook for host unload
5633 * @host: libata host to be unloaded
5634 *
5635 * Performs all duties necessary to shut down a libata port...
5636 * Kill port kthread, disable port, and release resources.
5637 *
5638 * LOCKING:
5639 * Inherited from SCSI layer.
5640 *
5641 * RETURNS:
5642 * One.
5643 */
5644
5645int ata_scsi_release(struct Scsi_Host *host)
5646{
Jeff Garzik35bb94b2006-04-11 13:12:34 -04005647 struct ata_port *ap = ata_shost_to_port(host);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005648
5649 DPRINTK("ENTER\n");
5650
5651 ap->ops->port_disable(ap);
Jeff Garzik6543bc02006-08-05 03:59:17 +09005652 ap->ops->port_stop(ap);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005653
5654 DPRINTK("EXIT\n");
5655 return 1;
5656}
5657
5658/**
5659 * ata_std_ports - initialize ioaddr with standard port offsets.
5660 * @ioaddr: IO address structure to be initialized
Edward Falk0baab862005-06-02 18:17:13 -04005661 *
5662 * Utility function which initializes data_addr, error_addr,
5663 * feature_addr, nsect_addr, lbal_addr, lbam_addr, lbah_addr,
5664 * device_addr, status_addr, and command_addr to standard offsets
5665 * relative to cmd_addr.
5666 *
5667 * Does not set ctl_addr, altstatus_addr, bmdma_addr, or scr_addr.
Linus Torvalds1da177e2005-04-16 15:20:36 -07005668 */
Edward Falk0baab862005-06-02 18:17:13 -04005669
Linus Torvalds1da177e2005-04-16 15:20:36 -07005670void ata_std_ports(struct ata_ioports *ioaddr)
5671{
5672 ioaddr->data_addr = ioaddr->cmd_addr + ATA_REG_DATA;
5673 ioaddr->error_addr = ioaddr->cmd_addr + ATA_REG_ERR;
5674 ioaddr->feature_addr = ioaddr->cmd_addr + ATA_REG_FEATURE;
5675 ioaddr->nsect_addr = ioaddr->cmd_addr + ATA_REG_NSECT;
5676 ioaddr->lbal_addr = ioaddr->cmd_addr + ATA_REG_LBAL;
5677 ioaddr->lbam_addr = ioaddr->cmd_addr + ATA_REG_LBAM;
5678 ioaddr->lbah_addr = ioaddr->cmd_addr + ATA_REG_LBAH;
5679 ioaddr->device_addr = ioaddr->cmd_addr + ATA_REG_DEVICE;
5680 ioaddr->status_addr = ioaddr->cmd_addr + ATA_REG_STATUS;
5681 ioaddr->command_addr = ioaddr->cmd_addr + ATA_REG_CMD;
5682}
5683
Edward Falk0baab862005-06-02 18:17:13 -04005684
Jeff Garzik374b1872005-08-30 05:42:52 -04005685#ifdef CONFIG_PCI
5686
5687void ata_pci_host_stop (struct ata_host_set *host_set)
5688{
5689 struct pci_dev *pdev = to_pci_dev(host_set->dev);
5690
5691 pci_iounmap(pdev, host_set->mmio_base);
5692}
5693
Edward Falk0baab862005-06-02 18:17:13 -04005694/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07005695 * ata_pci_remove_one - PCI layer callback for device removal
5696 * @pdev: PCI device that was removed
5697 *
5698 * PCI layer indicates to libata via this hook that
Randy Dunlap6f0ef4f2005-10-25 01:44:30 -04005699 * hot-unplug or module unload event has occurred.
Linus Torvalds1da177e2005-04-16 15:20:36 -07005700 * Handle this by unregistering all objects associated
5701 * with this PCI device. Free those objects. Then finally
5702 * release PCI resources and disable device.
5703 *
5704 * LOCKING:
5705 * Inherited from PCI layer (may sleep).
5706 */
5707
5708void ata_pci_remove_one (struct pci_dev *pdev)
5709{
5710 struct device *dev = pci_dev_to_dev(pdev);
5711 struct ata_host_set *host_set = dev_get_drvdata(dev);
Tejun Heof0eb62b2006-06-12 23:05:38 +09005712 struct ata_host_set *host_set2 = host_set->next;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005713
Alan Cox17b14452005-09-15 15:44:00 +01005714 ata_host_set_remove(host_set);
Tejun Heof0eb62b2006-06-12 23:05:38 +09005715 if (host_set2)
5716 ata_host_set_remove(host_set2);
5717
Linus Torvalds1da177e2005-04-16 15:20:36 -07005718 pci_release_regions(pdev);
5719 pci_disable_device(pdev);
5720 dev_set_drvdata(dev, NULL);
5721}
5722
5723/* move to PCI subsystem */
Jeff Garzik057ace52005-10-22 14:27:05 -04005724int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005725{
5726 unsigned long tmp = 0;
5727
5728 switch (bits->width) {
5729 case 1: {
5730 u8 tmp8 = 0;
5731 pci_read_config_byte(pdev, bits->reg, &tmp8);
5732 tmp = tmp8;
5733 break;
5734 }
5735 case 2: {
5736 u16 tmp16 = 0;
5737 pci_read_config_word(pdev, bits->reg, &tmp16);
5738 tmp = tmp16;
5739 break;
5740 }
5741 case 4: {
5742 u32 tmp32 = 0;
5743 pci_read_config_dword(pdev, bits->reg, &tmp32);
5744 tmp = tmp32;
5745 break;
5746 }
5747
5748 default:
5749 return -EINVAL;
5750 }
5751
5752 tmp &= bits->mask;
5753
5754 return (tmp == bits->val) ? 1 : 0;
5755}
Jens Axboe9b847542006-01-06 09:28:07 +01005756
Tejun Heo500530f2006-07-03 16:07:27 +09005757void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t state)
Jens Axboe9b847542006-01-06 09:28:07 +01005758{
5759 pci_save_state(pdev);
Tejun Heo500530f2006-07-03 16:07:27 +09005760
5761 if (state.event == PM_EVENT_SUSPEND) {
5762 pci_disable_device(pdev);
5763 pci_set_power_state(pdev, PCI_D3hot);
5764 }
Jens Axboe9b847542006-01-06 09:28:07 +01005765}
5766
Tejun Heo500530f2006-07-03 16:07:27 +09005767void ata_pci_device_do_resume(struct pci_dev *pdev)
Jens Axboe9b847542006-01-06 09:28:07 +01005768{
5769 pci_set_power_state(pdev, PCI_D0);
5770 pci_restore_state(pdev);
5771 pci_enable_device(pdev);
5772 pci_set_master(pdev);
Tejun Heo500530f2006-07-03 16:07:27 +09005773}
5774
5775int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t state)
5776{
5777 struct ata_host_set *host_set = dev_get_drvdata(&pdev->dev);
5778 int rc = 0;
5779
5780 rc = ata_host_set_suspend(host_set, state);
5781 if (rc)
5782 return rc;
5783
5784 if (host_set->next) {
5785 rc = ata_host_set_suspend(host_set->next, state);
5786 if (rc) {
5787 ata_host_set_resume(host_set);
5788 return rc;
5789 }
5790 }
5791
5792 ata_pci_device_do_suspend(pdev, state);
5793
5794 return 0;
5795}
5796
5797int ata_pci_device_resume(struct pci_dev *pdev)
5798{
5799 struct ata_host_set *host_set = dev_get_drvdata(&pdev->dev);
5800
5801 ata_pci_device_do_resume(pdev);
5802 ata_host_set_resume(host_set);
5803 if (host_set->next)
5804 ata_host_set_resume(host_set->next);
5805
Jens Axboe9b847542006-01-06 09:28:07 +01005806 return 0;
5807}
Linus Torvalds1da177e2005-04-16 15:20:36 -07005808#endif /* CONFIG_PCI */
5809
5810
Linus Torvalds1da177e2005-04-16 15:20:36 -07005811static int __init ata_init(void)
5812{
Andrew Mortona8601e52006-06-25 01:36:52 -07005813 ata_probe_timeout *= HZ;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005814 ata_wq = create_workqueue("ata");
5815 if (!ata_wq)
5816 return -ENOMEM;
5817
Tejun Heo453b07a2006-05-31 18:27:42 +09005818 ata_aux_wq = create_singlethread_workqueue("ata_aux");
5819 if (!ata_aux_wq) {
5820 destroy_workqueue(ata_wq);
5821 return -ENOMEM;
5822 }
5823
Linus Torvalds1da177e2005-04-16 15:20:36 -07005824 printk(KERN_DEBUG "libata version " DRV_VERSION " loaded.\n");
5825 return 0;
5826}
5827
5828static void __exit ata_exit(void)
5829{
5830 destroy_workqueue(ata_wq);
Tejun Heo453b07a2006-05-31 18:27:42 +09005831 destroy_workqueue(ata_aux_wq);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005832}
5833
5834module_init(ata_init);
5835module_exit(ata_exit);
5836
Jeff Garzik67846b32005-10-05 02:58:32 -04005837static unsigned long ratelimit_time;
Ingo Molnar34af9462006-06-27 02:53:55 -07005838static DEFINE_SPINLOCK(ata_ratelimit_lock);
Jeff Garzik67846b32005-10-05 02:58:32 -04005839
5840int ata_ratelimit(void)
5841{
5842 int rc;
5843 unsigned long flags;
5844
5845 spin_lock_irqsave(&ata_ratelimit_lock, flags);
5846
5847 if (time_after(jiffies, ratelimit_time)) {
5848 rc = 1;
5849 ratelimit_time = jiffies + (HZ/5);
5850 } else
5851 rc = 0;
5852
5853 spin_unlock_irqrestore(&ata_ratelimit_lock, flags);
5854
5855 return rc;
5856}
5857
Tejun Heoc22daff2006-04-11 22:22:29 +09005858/**
5859 * ata_wait_register - wait until register value changes
5860 * @reg: IO-mapped register
5861 * @mask: Mask to apply to read register value
5862 * @val: Wait condition
5863 * @interval_msec: polling interval in milliseconds
5864 * @timeout_msec: timeout in milliseconds
5865 *
5866 * Waiting for some bits of register to change is a common
5867 * operation for ATA controllers. This function reads 32bit LE
5868 * IO-mapped register @reg and tests for the following condition.
5869 *
5870 * (*@reg & mask) != val
5871 *
5872 * If the condition is met, it returns; otherwise, the process is
5873 * repeated after @interval_msec until timeout.
5874 *
5875 * LOCKING:
5876 * Kernel thread context (may sleep)
5877 *
5878 * RETURNS:
5879 * The final register value.
5880 */
5881u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val,
5882 unsigned long interval_msec,
5883 unsigned long timeout_msec)
5884{
5885 unsigned long timeout;
5886 u32 tmp;
5887
5888 tmp = ioread32(reg);
5889
5890 /* Calculate timeout _after_ the first read to make sure
5891 * preceding writes reach the controller before starting to
5892 * eat away the timeout.
5893 */
5894 timeout = jiffies + (timeout_msec * HZ) / 1000;
5895
5896 while ((tmp & mask) == val && time_before(jiffies, timeout)) {
5897 msleep(interval_msec);
5898 tmp = ioread32(reg);
5899 }
5900
5901 return tmp;
5902}
5903
Linus Torvalds1da177e2005-04-16 15:20:36 -07005904/*
5905 * libata is essentially a library of internal helper functions for
5906 * low-level ATA host controller drivers. As such, the API/ABI is
5907 * likely to change as new drivers are added and updated.
5908 * Do not depend on ABI/API stability.
5909 */
5910
Tejun Heoe9c83912006-07-03 16:07:26 +09005911EXPORT_SYMBOL_GPL(sata_deb_timing_normal);
5912EXPORT_SYMBOL_GPL(sata_deb_timing_hotplug);
5913EXPORT_SYMBOL_GPL(sata_deb_timing_long);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005914EXPORT_SYMBOL_GPL(ata_std_bios_param);
5915EXPORT_SYMBOL_GPL(ata_std_ports);
5916EXPORT_SYMBOL_GPL(ata_device_add);
Tejun Heo720ba122006-05-31 18:28:13 +09005917EXPORT_SYMBOL_GPL(ata_port_detach);
Alan Cox17b14452005-09-15 15:44:00 +01005918EXPORT_SYMBOL_GPL(ata_host_set_remove);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005919EXPORT_SYMBOL_GPL(ata_sg_init);
5920EXPORT_SYMBOL_GPL(ata_sg_init_one);
Tejun Heo9a1004d2006-05-31 18:27:52 +09005921EXPORT_SYMBOL_GPL(ata_hsm_move);
Tejun Heof686bcb2006-05-15 20:58:05 +09005922EXPORT_SYMBOL_GPL(ata_qc_complete);
Tejun Heodedaf2b2006-05-15 21:03:43 +09005923EXPORT_SYMBOL_GPL(ata_qc_complete_multiple);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005924EXPORT_SYMBOL_GPL(ata_qc_issue_prot);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005925EXPORT_SYMBOL_GPL(ata_tf_load);
5926EXPORT_SYMBOL_GPL(ata_tf_read);
5927EXPORT_SYMBOL_GPL(ata_noop_dev_select);
5928EXPORT_SYMBOL_GPL(ata_std_dev_select);
5929EXPORT_SYMBOL_GPL(ata_tf_to_fis);
5930EXPORT_SYMBOL_GPL(ata_tf_from_fis);
5931EXPORT_SYMBOL_GPL(ata_check_status);
5932EXPORT_SYMBOL_GPL(ata_altstatus);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005933EXPORT_SYMBOL_GPL(ata_exec_command);
5934EXPORT_SYMBOL_GPL(ata_port_start);
5935EXPORT_SYMBOL_GPL(ata_port_stop);
Jeff Garzikaa8f0dc2005-05-26 21:54:27 -04005936EXPORT_SYMBOL_GPL(ata_host_stop);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005937EXPORT_SYMBOL_GPL(ata_interrupt);
Alan Coxa6b2c5d2006-05-22 16:59:59 +01005938EXPORT_SYMBOL_GPL(ata_mmio_data_xfer);
5939EXPORT_SYMBOL_GPL(ata_pio_data_xfer);
Alan Cox75e99582006-05-24 14:14:41 +01005940EXPORT_SYMBOL_GPL(ata_pio_data_xfer_noirq);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005941EXPORT_SYMBOL_GPL(ata_qc_prep);
Brian Kinge46834c2006-03-17 17:04:03 -06005942EXPORT_SYMBOL_GPL(ata_noop_qc_prep);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005943EXPORT_SYMBOL_GPL(ata_bmdma_setup);
5944EXPORT_SYMBOL_GPL(ata_bmdma_start);
5945EXPORT_SYMBOL_GPL(ata_bmdma_irq_clear);
5946EXPORT_SYMBOL_GPL(ata_bmdma_status);
5947EXPORT_SYMBOL_GPL(ata_bmdma_stop);
Tejun Heo6d97dbd2006-05-15 20:58:24 +09005948EXPORT_SYMBOL_GPL(ata_bmdma_freeze);
5949EXPORT_SYMBOL_GPL(ata_bmdma_thaw);
5950EXPORT_SYMBOL_GPL(ata_bmdma_drive_eh);
5951EXPORT_SYMBOL_GPL(ata_bmdma_error_handler);
5952EXPORT_SYMBOL_GPL(ata_bmdma_post_internal_cmd);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005953EXPORT_SYMBOL_GPL(ata_port_probe);
Tejun Heo3c567b72006-05-15 20:57:23 +09005954EXPORT_SYMBOL_GPL(sata_set_spd);
Tejun Heod7bb4cc2006-05-31 18:27:46 +09005955EXPORT_SYMBOL_GPL(sata_phy_debounce);
5956EXPORT_SYMBOL_GPL(sata_phy_resume);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005957EXPORT_SYMBOL_GPL(sata_phy_reset);
5958EXPORT_SYMBOL_GPL(__sata_phy_reset);
5959EXPORT_SYMBOL_GPL(ata_bus_reset);
Tejun Heof5914a42006-05-31 18:27:48 +09005960EXPORT_SYMBOL_GPL(ata_std_prereset);
Tejun Heoc2bd5802006-01-24 17:05:22 +09005961EXPORT_SYMBOL_GPL(ata_std_softreset);
5962EXPORT_SYMBOL_GPL(sata_std_hardreset);
5963EXPORT_SYMBOL_GPL(ata_std_postreset);
Tejun Heo623a3122006-03-05 17:55:58 +09005964EXPORT_SYMBOL_GPL(ata_dev_revalidate);
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05005965EXPORT_SYMBOL_GPL(ata_dev_classify);
5966EXPORT_SYMBOL_GPL(ata_dev_pair);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005967EXPORT_SYMBOL_GPL(ata_port_disable);
Jeff Garzik67846b32005-10-05 02:58:32 -04005968EXPORT_SYMBOL_GPL(ata_ratelimit);
Tejun Heoc22daff2006-04-11 22:22:29 +09005969EXPORT_SYMBOL_GPL(ata_wait_register);
Tejun Heo6f8b9952006-01-24 17:05:21 +09005970EXPORT_SYMBOL_GPL(ata_busy_sleep);
Tejun Heo86e45b62006-03-05 15:29:09 +09005971EXPORT_SYMBOL_GPL(ata_port_queue_task);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005972EXPORT_SYMBOL_GPL(ata_scsi_ioctl);
5973EXPORT_SYMBOL_GPL(ata_scsi_queuecmd);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005974EXPORT_SYMBOL_GPL(ata_scsi_slave_config);
Tejun Heo83c47bc2006-05-31 18:28:07 +09005975EXPORT_SYMBOL_GPL(ata_scsi_slave_destroy);
Tejun Heoa6e6ce82006-05-15 21:03:48 +09005976EXPORT_SYMBOL_GPL(ata_scsi_change_queue_depth);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005977EXPORT_SYMBOL_GPL(ata_scsi_release);
5978EXPORT_SYMBOL_GPL(ata_host_intr);
Tejun Heo34bf2172006-05-15 20:57:46 +09005979EXPORT_SYMBOL_GPL(sata_scr_valid);
5980EXPORT_SYMBOL_GPL(sata_scr_read);
5981EXPORT_SYMBOL_GPL(sata_scr_write);
5982EXPORT_SYMBOL_GPL(sata_scr_write_flush);
5983EXPORT_SYMBOL_GPL(ata_port_online);
5984EXPORT_SYMBOL_GPL(ata_port_offline);
Tejun Heo500530f2006-07-03 16:07:27 +09005985EXPORT_SYMBOL_GPL(ata_host_set_suspend);
5986EXPORT_SYMBOL_GPL(ata_host_set_resume);
Tejun Heo6a62a042006-02-13 10:02:46 +09005987EXPORT_SYMBOL_GPL(ata_id_string);
5988EXPORT_SYMBOL_GPL(ata_id_c_string);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005989EXPORT_SYMBOL_GPL(ata_scsi_simulate);
5990
Alan Cox1bc4ccf2006-01-09 17:18:14 +00005991EXPORT_SYMBOL_GPL(ata_pio_need_iordy);
Alan Cox452503f2005-10-21 19:01:32 -04005992EXPORT_SYMBOL_GPL(ata_timing_compute);
5993EXPORT_SYMBOL_GPL(ata_timing_merge);
5994
Linus Torvalds1da177e2005-04-16 15:20:36 -07005995#ifdef CONFIG_PCI
5996EXPORT_SYMBOL_GPL(pci_test_config_bits);
Jeff Garzik374b1872005-08-30 05:42:52 -04005997EXPORT_SYMBOL_GPL(ata_pci_host_stop);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005998EXPORT_SYMBOL_GPL(ata_pci_init_native_mode);
5999EXPORT_SYMBOL_GPL(ata_pci_init_one);
6000EXPORT_SYMBOL_GPL(ata_pci_remove_one);
Tejun Heo500530f2006-07-03 16:07:27 +09006001EXPORT_SYMBOL_GPL(ata_pci_device_do_suspend);
6002EXPORT_SYMBOL_GPL(ata_pci_device_do_resume);
Jens Axboe9b847542006-01-06 09:28:07 +01006003EXPORT_SYMBOL_GPL(ata_pci_device_suspend);
6004EXPORT_SYMBOL_GPL(ata_pci_device_resume);
Alan Cox67951ad2006-03-22 15:55:54 +00006005EXPORT_SYMBOL_GPL(ata_pci_default_filter);
6006EXPORT_SYMBOL_GPL(ata_pci_clear_simplex);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006007#endif /* CONFIG_PCI */
Jens Axboe9b847542006-01-06 09:28:07 +01006008
Jens Axboe9b847542006-01-06 09:28:07 +01006009EXPORT_SYMBOL_GPL(ata_scsi_device_suspend);
6010EXPORT_SYMBOL_GPL(ata_scsi_device_resume);
Tejun Heoece1d632006-04-02 18:51:53 +09006011
Tejun Heoece1d632006-04-02 18:51:53 +09006012EXPORT_SYMBOL_GPL(ata_eng_timeout);
Tejun Heo7b70fc02006-05-15 20:58:07 +09006013EXPORT_SYMBOL_GPL(ata_port_schedule_eh);
6014EXPORT_SYMBOL_GPL(ata_port_abort);
Tejun Heoe3180492006-05-15 20:58:09 +09006015EXPORT_SYMBOL_GPL(ata_port_freeze);
6016EXPORT_SYMBOL_GPL(ata_eh_freeze_port);
6017EXPORT_SYMBOL_GPL(ata_eh_thaw_port);
Tejun Heoece1d632006-04-02 18:51:53 +09006018EXPORT_SYMBOL_GPL(ata_eh_qc_complete);
6019EXPORT_SYMBOL_GPL(ata_eh_qc_retry);
Tejun Heo022bdb02006-05-15 20:58:22 +09006020EXPORT_SYMBOL_GPL(ata_do_eh);