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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>
Jeff Garzik193515d2005-11-07 00:59:37 -050053#include <scsi/scsi_cmnd.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070054#include <scsi/scsi_host.h>
55#include <linux/libata.h>
56#include <asm/io.h>
57#include <asm/semaphore.h>
58#include <asm/byteorder.h>
59
60#include "libata.h"
61
Jeff Garzik8bc3fc42007-05-21 20:26:38 -040062#define DRV_VERSION "2.21" /* must be exactly four chars */
Jeff Garzikfda0efc2007-01-31 07:43:15 -050063
64
Tejun Heod7bb4cc2006-05-31 18:27:46 +090065/* debounce timing parameters in msecs { interval, duration, timeout } */
Tejun Heoe9c83912006-07-03 16:07:26 +090066const unsigned long sata_deb_timing_normal[] = { 5, 100, 2000 };
67const unsigned long sata_deb_timing_hotplug[] = { 25, 500, 2000 };
68const unsigned long sata_deb_timing_long[] = { 100, 2000, 5000 };
Tejun Heod7bb4cc2006-05-31 18:27:46 +090069
Tejun Heo3373efd2006-05-15 20:57:53 +090070static unsigned int ata_dev_init_params(struct ata_device *dev,
71 u16 heads, u16 sectors);
72static unsigned int ata_dev_set_xfermode(struct ata_device *dev);
Kristen Carlson Accardi9f45cbd2007-08-15 03:57:11 -040073static unsigned int ata_dev_set_AN(struct ata_device *dev, u8 enable);
Tejun Heo3373efd2006-05-15 20:57:53 +090074static void ata_dev_xfermask(struct ata_device *dev);
Tejun Heo75683fe2007-07-05 13:31:27 +090075static unsigned long ata_dev_blacklisted(const struct ata_device *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -070076
Tejun Heof3187192007-04-17 23:44:07 +090077unsigned int ata_print_id = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -070078static struct workqueue_struct *ata_wq;
79
Tejun Heo453b07a2006-05-31 18:27:42 +090080struct workqueue_struct *ata_aux_wq;
81
Jeff Garzik418dc1f2006-03-11 20:50:08 -050082int atapi_enabled = 1;
Jeff Garzik1623c812005-08-30 03:37:42 -040083module_param(atapi_enabled, int, 0444);
84MODULE_PARM_DESC(atapi_enabled, "Enable discovery of ATAPI devices (0=off, 1=on)");
85
Albert Lee95de7192006-04-04 10:57:18 +080086int atapi_dmadir = 0;
87module_param(atapi_dmadir, int, 0444);
88MODULE_PARM_DESC(atapi_dmadir, "Enable ATAPI DMADIR bridge support (0=off, 1=on)");
89
Mark Lordbaf4fdf2007-08-08 01:08:45 +090090int atapi_passthru16 = 1;
91module_param(atapi_passthru16, int, 0444);
92MODULE_PARM_DESC(atapi_passthru16, "Enable ATA_16 passthru for ATAPI devices; on by default (0=off, 1=on)");
93
Jeff Garzikc3c013a2006-02-27 22:31:19 -050094int libata_fua = 0;
95module_param_named(fua, libata_fua, int, 0444);
96MODULE_PARM_DESC(fua, "FUA support (0=off, 1=on)");
97
Alan Cox1e999732007-04-11 00:23:13 +010098static int ata_ignore_hpa = 0;
99module_param_named(ignore_hpa, ata_ignore_hpa, int, 0644);
100MODULE_PARM_DESC(ignore_hpa, "Ignore HPA limit (0=keep BIOS limits, 1=ignore limits, using full disk)");
101
Andrew Mortona8601e52006-06-25 01:36:52 -0700102static int ata_probe_timeout = ATA_TMOUT_INTERNAL / HZ;
103module_param(ata_probe_timeout, int, 0444);
104MODULE_PARM_DESC(ata_probe_timeout, "Set ATA probing timeout (seconds)");
105
Jeff Garzikd7d0dad2007-03-28 01:57:37 -0400106int libata_noacpi = 1;
107module_param_named(noacpi, libata_noacpi, int, 0444);
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700108MODULE_PARM_DESC(noacpi, "Disables the use of ACPI in suspend/resume when set");
109
Linus Torvalds1da177e2005-04-16 15:20:36 -0700110MODULE_AUTHOR("Jeff Garzik");
111MODULE_DESCRIPTION("Library module for ATA devices");
112MODULE_LICENSE("GPL");
113MODULE_VERSION(DRV_VERSION);
114
Edward Falk0baab862005-06-02 18:17:13 -0400115
116/**
Linus Torvalds1da177e2005-04-16 15:20:36 -0700117 * ata_tf_to_fis - Convert ATA taskfile to SATA FIS structure
118 * @tf: Taskfile to convert
Linus Torvalds1da177e2005-04-16 15:20:36 -0700119 * @pmp: Port multiplier port
Tejun Heo99771262007-07-16 14:29:38 +0900120 * @is_cmd: This FIS is for command
121 * @fis: Buffer into which data will output
Linus Torvalds1da177e2005-04-16 15:20:36 -0700122 *
123 * Converts a standard ATA taskfile to a Serial ATA
124 * FIS structure (Register - Host to Device).
125 *
126 * LOCKING:
127 * Inherited from caller.
128 */
Tejun Heo99771262007-07-16 14:29:38 +0900129void ata_tf_to_fis(const struct ata_taskfile *tf, u8 pmp, int is_cmd, u8 *fis)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700130{
Tejun Heo99771262007-07-16 14:29:38 +0900131 fis[0] = 0x27; /* Register - Host to Device FIS */
132 fis[1] = pmp & 0xf; /* Port multiplier number*/
133 if (is_cmd)
134 fis[1] |= (1 << 7); /* bit 7 indicates Command FIS */
135
Linus Torvalds1da177e2005-04-16 15:20:36 -0700136 fis[2] = tf->command;
137 fis[3] = tf->feature;
138
139 fis[4] = tf->lbal;
140 fis[5] = tf->lbam;
141 fis[6] = tf->lbah;
142 fis[7] = tf->device;
143
144 fis[8] = tf->hob_lbal;
145 fis[9] = tf->hob_lbam;
146 fis[10] = tf->hob_lbah;
147 fis[11] = tf->hob_feature;
148
149 fis[12] = tf->nsect;
150 fis[13] = tf->hob_nsect;
151 fis[14] = 0;
152 fis[15] = tf->ctl;
153
154 fis[16] = 0;
155 fis[17] = 0;
156 fis[18] = 0;
157 fis[19] = 0;
158}
159
160/**
161 * ata_tf_from_fis - Convert SATA FIS to ATA taskfile
162 * @fis: Buffer from which data will be input
163 * @tf: Taskfile to output
164 *
Mark Lorde12a1be2005-11-12 18:55:45 -0500165 * Converts a serial ATA FIS structure to a standard ATA taskfile.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700166 *
167 * LOCKING:
168 * Inherited from caller.
169 */
170
Jeff Garzik057ace52005-10-22 14:27:05 -0400171void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700172{
173 tf->command = fis[2]; /* status */
174 tf->feature = fis[3]; /* error */
175
176 tf->lbal = fis[4];
177 tf->lbam = fis[5];
178 tf->lbah = fis[6];
179 tf->device = fis[7];
180
181 tf->hob_lbal = fis[8];
182 tf->hob_lbam = fis[9];
183 tf->hob_lbah = fis[10];
184
185 tf->nsect = fis[12];
186 tf->hob_nsect = fis[13];
187}
188
Albert Lee8cbd6df2005-10-12 15:06:27 +0800189static const u8 ata_rw_cmds[] = {
190 /* pio multi */
191 ATA_CMD_READ_MULTI,
192 ATA_CMD_WRITE_MULTI,
193 ATA_CMD_READ_MULTI_EXT,
194 ATA_CMD_WRITE_MULTI_EXT,
Tejun Heo9a3dccc2006-01-06 09:56:18 +0100195 0,
196 0,
197 0,
198 ATA_CMD_WRITE_MULTI_FUA_EXT,
Albert Lee8cbd6df2005-10-12 15:06:27 +0800199 /* pio */
200 ATA_CMD_PIO_READ,
201 ATA_CMD_PIO_WRITE,
202 ATA_CMD_PIO_READ_EXT,
203 ATA_CMD_PIO_WRITE_EXT,
Tejun Heo9a3dccc2006-01-06 09:56:18 +0100204 0,
205 0,
206 0,
207 0,
Albert Lee8cbd6df2005-10-12 15:06:27 +0800208 /* dma */
209 ATA_CMD_READ,
210 ATA_CMD_WRITE,
211 ATA_CMD_READ_EXT,
Tejun Heo9a3dccc2006-01-06 09:56:18 +0100212 ATA_CMD_WRITE_EXT,
213 0,
214 0,
215 0,
216 ATA_CMD_WRITE_FUA_EXT
Albert Lee8cbd6df2005-10-12 15:06:27 +0800217};
Linus Torvalds1da177e2005-04-16 15:20:36 -0700218
219/**
Albert Lee8cbd6df2005-10-12 15:06:27 +0800220 * ata_rwcmd_protocol - set taskfile r/w commands and protocol
Tejun Heobd056d72006-11-14 22:47:10 +0900221 * @tf: command to examine and configure
222 * @dev: device tf belongs to
Linus Torvalds1da177e2005-04-16 15:20:36 -0700223 *
Jeff Garzik2e9edbf2006-03-24 09:56:57 -0500224 * Examine the device configuration and tf->flags to calculate
Albert Lee8cbd6df2005-10-12 15:06:27 +0800225 * the proper read/write commands and protocol to use.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700226 *
227 * LOCKING:
228 * caller.
229 */
Tejun Heobd056d72006-11-14 22:47:10 +0900230static int ata_rwcmd_protocol(struct ata_taskfile *tf, struct ata_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700231{
Tejun Heo9a3dccc2006-01-06 09:56:18 +0100232 u8 cmd;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700233
Tejun Heo9a3dccc2006-01-06 09:56:18 +0100234 int index, fua, lba48, write;
Jeff Garzik2e9edbf2006-03-24 09:56:57 -0500235
Tejun Heo9a3dccc2006-01-06 09:56:18 +0100236 fua = (tf->flags & ATA_TFLAG_FUA) ? 4 : 0;
Albert Lee8cbd6df2005-10-12 15:06:27 +0800237 lba48 = (tf->flags & ATA_TFLAG_LBA48) ? 2 : 0;
238 write = (tf->flags & ATA_TFLAG_WRITE) ? 1 : 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700239
Albert Lee8cbd6df2005-10-12 15:06:27 +0800240 if (dev->flags & ATA_DFLAG_PIO) {
241 tf->protocol = ATA_PROT_PIO;
Tejun Heo9a3dccc2006-01-06 09:56:18 +0100242 index = dev->multi_count ? 0 : 8;
Tejun Heo9af5c9c2007-08-06 18:36:22 +0900243 } else if (lba48 && (dev->link->ap->flags & ATA_FLAG_PIO_LBA48)) {
Alan Cox8d238e02006-01-17 20:50:31 +0000244 /* Unable to use DMA due to host limitation */
245 tf->protocol = ATA_PROT_PIO;
Albert Lee0565c262006-02-13 18:55:25 +0800246 index = dev->multi_count ? 0 : 8;
Albert Lee8cbd6df2005-10-12 15:06:27 +0800247 } else {
248 tf->protocol = ATA_PROT_DMA;
Tejun Heo9a3dccc2006-01-06 09:56:18 +0100249 index = 16;
Albert Lee8cbd6df2005-10-12 15:06:27 +0800250 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700251
Tejun Heo9a3dccc2006-01-06 09:56:18 +0100252 cmd = ata_rw_cmds[index + fua + lba48 + write];
253 if (cmd) {
254 tf->command = cmd;
255 return 0;
256 }
257 return -1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700258}
259
Tejun Heocb95d562006-03-06 04:31:56 +0900260/**
Tejun Heo35b649f2006-11-14 22:37:35 +0900261 * ata_tf_read_block - Read block address from ATA taskfile
262 * @tf: ATA taskfile of interest
263 * @dev: ATA device @tf belongs to
264 *
265 * LOCKING:
266 * None.
267 *
268 * Read block address from @tf. This function can handle all
269 * three address formats - LBA, LBA48 and CHS. tf->protocol and
270 * flags select the address format to use.
271 *
272 * RETURNS:
273 * Block address read from @tf.
274 */
275u64 ata_tf_read_block(struct ata_taskfile *tf, struct ata_device *dev)
276{
277 u64 block = 0;
278
279 if (tf->flags & ATA_TFLAG_LBA) {
280 if (tf->flags & ATA_TFLAG_LBA48) {
281 block |= (u64)tf->hob_lbah << 40;
282 block |= (u64)tf->hob_lbam << 32;
283 block |= tf->hob_lbal << 24;
284 } else
285 block |= (tf->device & 0xf) << 24;
286
287 block |= tf->lbah << 16;
288 block |= tf->lbam << 8;
289 block |= tf->lbal;
290 } else {
291 u32 cyl, head, sect;
292
293 cyl = tf->lbam | (tf->lbah << 8);
294 head = tf->device & 0xf;
295 sect = tf->lbal;
296
297 block = (cyl * dev->heads + head) * dev->sectors + sect;
298 }
299
300 return block;
301}
302
303/**
Tejun Heobd056d72006-11-14 22:47:10 +0900304 * ata_build_rw_tf - Build ATA taskfile for given read/write request
305 * @tf: Target ATA taskfile
306 * @dev: ATA device @tf belongs to
307 * @block: Block address
308 * @n_block: Number of blocks
309 * @tf_flags: RW/FUA etc...
310 * @tag: tag
311 *
312 * LOCKING:
313 * None.
314 *
315 * Build ATA taskfile @tf for read/write request described by
316 * @block, @n_block, @tf_flags and @tag on @dev.
317 *
318 * RETURNS:
319 *
320 * 0 on success, -ERANGE if the request is too large for @dev,
321 * -EINVAL if the request is invalid.
322 */
323int ata_build_rw_tf(struct ata_taskfile *tf, struct ata_device *dev,
324 u64 block, u32 n_block, unsigned int tf_flags,
325 unsigned int tag)
326{
327 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
328 tf->flags |= tf_flags;
329
Tejun Heo6d1245b2007-02-20 23:20:27 +0900330 if (ata_ncq_enabled(dev) && likely(tag != ATA_TAG_INTERNAL)) {
Tejun Heobd056d72006-11-14 22:47:10 +0900331 /* yay, NCQ */
332 if (!lba_48_ok(block, n_block))
333 return -ERANGE;
334
335 tf->protocol = ATA_PROT_NCQ;
336 tf->flags |= ATA_TFLAG_LBA | ATA_TFLAG_LBA48;
337
338 if (tf->flags & ATA_TFLAG_WRITE)
339 tf->command = ATA_CMD_FPDMA_WRITE;
340 else
341 tf->command = ATA_CMD_FPDMA_READ;
342
343 tf->nsect = tag << 3;
344 tf->hob_feature = (n_block >> 8) & 0xff;
345 tf->feature = n_block & 0xff;
346
347 tf->hob_lbah = (block >> 40) & 0xff;
348 tf->hob_lbam = (block >> 32) & 0xff;
349 tf->hob_lbal = (block >> 24) & 0xff;
350 tf->lbah = (block >> 16) & 0xff;
351 tf->lbam = (block >> 8) & 0xff;
352 tf->lbal = block & 0xff;
353
354 tf->device = 1 << 6;
355 if (tf->flags & ATA_TFLAG_FUA)
356 tf->device |= 1 << 7;
357 } else if (dev->flags & ATA_DFLAG_LBA) {
358 tf->flags |= ATA_TFLAG_LBA;
359
360 if (lba_28_ok(block, n_block)) {
361 /* use LBA28 */
362 tf->device |= (block >> 24) & 0xf;
363 } else if (lba_48_ok(block, n_block)) {
364 if (!(dev->flags & ATA_DFLAG_LBA48))
365 return -ERANGE;
366
367 /* use LBA48 */
368 tf->flags |= ATA_TFLAG_LBA48;
369
370 tf->hob_nsect = (n_block >> 8) & 0xff;
371
372 tf->hob_lbah = (block >> 40) & 0xff;
373 tf->hob_lbam = (block >> 32) & 0xff;
374 tf->hob_lbal = (block >> 24) & 0xff;
375 } else
376 /* request too large even for LBA48 */
377 return -ERANGE;
378
379 if (unlikely(ata_rwcmd_protocol(tf, dev) < 0))
380 return -EINVAL;
381
382 tf->nsect = n_block & 0xff;
383
384 tf->lbah = (block >> 16) & 0xff;
385 tf->lbam = (block >> 8) & 0xff;
386 tf->lbal = block & 0xff;
387
388 tf->device |= ATA_LBA;
389 } else {
390 /* CHS */
391 u32 sect, head, cyl, track;
392
393 /* The request -may- be too large for CHS addressing. */
394 if (!lba_28_ok(block, n_block))
395 return -ERANGE;
396
397 if (unlikely(ata_rwcmd_protocol(tf, dev) < 0))
398 return -EINVAL;
399
400 /* Convert LBA to CHS */
401 track = (u32)block / dev->sectors;
402 cyl = track / dev->heads;
403 head = track % dev->heads;
404 sect = (u32)block % dev->sectors + 1;
405
406 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
407 (u32)block, track, cyl, head, sect);
408
409 /* Check whether the converted CHS can fit.
410 Cylinder: 0-65535
411 Head: 0-15
412 Sector: 1-255*/
413 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
414 return -ERANGE;
415
416 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
417 tf->lbal = sect;
418 tf->lbam = cyl;
419 tf->lbah = cyl >> 8;
420 tf->device |= head;
421 }
422
423 return 0;
424}
425
426/**
Tejun Heocb95d562006-03-06 04:31:56 +0900427 * ata_pack_xfermask - Pack pio, mwdma and udma masks into xfer_mask
428 * @pio_mask: pio_mask
429 * @mwdma_mask: mwdma_mask
430 * @udma_mask: udma_mask
431 *
432 * Pack @pio_mask, @mwdma_mask and @udma_mask into a single
433 * unsigned int xfer_mask.
434 *
435 * LOCKING:
436 * None.
437 *
438 * RETURNS:
439 * Packed xfer_mask.
440 */
441static unsigned int ata_pack_xfermask(unsigned int pio_mask,
442 unsigned int mwdma_mask,
443 unsigned int udma_mask)
444{
445 return ((pio_mask << ATA_SHIFT_PIO) & ATA_MASK_PIO) |
446 ((mwdma_mask << ATA_SHIFT_MWDMA) & ATA_MASK_MWDMA) |
447 ((udma_mask << ATA_SHIFT_UDMA) & ATA_MASK_UDMA);
448}
449
Tejun Heoc0489e42006-03-24 14:07:49 +0900450/**
451 * ata_unpack_xfermask - Unpack xfer_mask into pio, mwdma and udma masks
452 * @xfer_mask: xfer_mask to unpack
453 * @pio_mask: resulting pio_mask
454 * @mwdma_mask: resulting mwdma_mask
455 * @udma_mask: resulting udma_mask
456 *
457 * Unpack @xfer_mask into @pio_mask, @mwdma_mask and @udma_mask.
458 * Any NULL distination masks will be ignored.
459 */
460static void ata_unpack_xfermask(unsigned int xfer_mask,
461 unsigned int *pio_mask,
462 unsigned int *mwdma_mask,
463 unsigned int *udma_mask)
464{
465 if (pio_mask)
466 *pio_mask = (xfer_mask & ATA_MASK_PIO) >> ATA_SHIFT_PIO;
467 if (mwdma_mask)
468 *mwdma_mask = (xfer_mask & ATA_MASK_MWDMA) >> ATA_SHIFT_MWDMA;
469 if (udma_mask)
470 *udma_mask = (xfer_mask & ATA_MASK_UDMA) >> ATA_SHIFT_UDMA;
471}
472
Tejun Heocb95d562006-03-06 04:31:56 +0900473static const struct ata_xfer_ent {
Tejun Heobe9a50c2006-03-31 22:48:52 +0900474 int shift, bits;
Tejun Heocb95d562006-03-06 04:31:56 +0900475 u8 base;
476} ata_xfer_tbl[] = {
477 { ATA_SHIFT_PIO, ATA_BITS_PIO, XFER_PIO_0 },
478 { ATA_SHIFT_MWDMA, ATA_BITS_MWDMA, XFER_MW_DMA_0 },
479 { ATA_SHIFT_UDMA, ATA_BITS_UDMA, XFER_UDMA_0 },
480 { -1, },
481};
482
483/**
484 * ata_xfer_mask2mode - Find matching XFER_* for the given xfer_mask
485 * @xfer_mask: xfer_mask of interest
486 *
487 * Return matching XFER_* value for @xfer_mask. Only the highest
488 * bit of @xfer_mask is considered.
489 *
490 * LOCKING:
491 * None.
492 *
493 * RETURNS:
494 * Matching XFER_* value, 0 if no match found.
495 */
496static u8 ata_xfer_mask2mode(unsigned int xfer_mask)
497{
498 int highbit = fls(xfer_mask) - 1;
499 const struct ata_xfer_ent *ent;
500
501 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
502 if (highbit >= ent->shift && highbit < ent->shift + ent->bits)
503 return ent->base + highbit - ent->shift;
504 return 0;
505}
506
507/**
508 * ata_xfer_mode2mask - Find matching xfer_mask for XFER_*
509 * @xfer_mode: XFER_* of interest
510 *
511 * Return matching xfer_mask for @xfer_mode.
512 *
513 * LOCKING:
514 * None.
515 *
516 * RETURNS:
517 * Matching xfer_mask, 0 if no match found.
518 */
519static unsigned int ata_xfer_mode2mask(u8 xfer_mode)
520{
521 const struct ata_xfer_ent *ent;
522
523 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
524 if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits)
525 return 1 << (ent->shift + xfer_mode - ent->base);
526 return 0;
527}
528
529/**
530 * ata_xfer_mode2shift - Find matching xfer_shift for XFER_*
531 * @xfer_mode: XFER_* of interest
532 *
533 * Return matching xfer_shift for @xfer_mode.
534 *
535 * LOCKING:
536 * None.
537 *
538 * RETURNS:
539 * Matching xfer_shift, -1 if no match found.
540 */
541static int ata_xfer_mode2shift(unsigned int xfer_mode)
542{
543 const struct ata_xfer_ent *ent;
544
545 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
546 if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits)
547 return ent->shift;
548 return -1;
549}
550
Linus Torvalds1da177e2005-04-16 15:20:36 -0700551/**
Tejun Heo1da7b0d2006-03-06 04:31:56 +0900552 * ata_mode_string - convert xfer_mask to string
553 * @xfer_mask: mask of bits supported; only highest bit counts.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700554 *
555 * Determine string which represents the highest speed
Tejun Heo1da7b0d2006-03-06 04:31:56 +0900556 * (highest bit in @modemask).
Linus Torvalds1da177e2005-04-16 15:20:36 -0700557 *
558 * LOCKING:
559 * None.
560 *
561 * RETURNS:
562 * Constant C string representing highest speed listed in
Tejun Heo1da7b0d2006-03-06 04:31:56 +0900563 * @mode_mask, or the constant C string "<n/a>".
Linus Torvalds1da177e2005-04-16 15:20:36 -0700564 */
Tejun Heo1da7b0d2006-03-06 04:31:56 +0900565static const char *ata_mode_string(unsigned int xfer_mask)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700566{
Tejun Heo75f554b2006-03-06 04:31:57 +0900567 static const char * const xfer_mode_str[] = {
568 "PIO0",
569 "PIO1",
570 "PIO2",
571 "PIO3",
572 "PIO4",
Alan Coxb352e572006-08-10 18:52:12 +0100573 "PIO5",
574 "PIO6",
Tejun Heo75f554b2006-03-06 04:31:57 +0900575 "MWDMA0",
576 "MWDMA1",
577 "MWDMA2",
Alan Coxb352e572006-08-10 18:52:12 +0100578 "MWDMA3",
579 "MWDMA4",
Tejun Heo75f554b2006-03-06 04:31:57 +0900580 "UDMA/16",
581 "UDMA/25",
582 "UDMA/33",
583 "UDMA/44",
584 "UDMA/66",
585 "UDMA/100",
586 "UDMA/133",
587 "UDMA7",
588 };
Tejun Heo1da7b0d2006-03-06 04:31:56 +0900589 int highbit;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700590
Tejun Heo1da7b0d2006-03-06 04:31:56 +0900591 highbit = fls(xfer_mask) - 1;
592 if (highbit >= 0 && highbit < ARRAY_SIZE(xfer_mode_str))
593 return xfer_mode_str[highbit];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700594 return "<n/a>";
Linus Torvalds1da177e2005-04-16 15:20:36 -0700595}
596
Tejun Heo4c360c82006-04-01 01:38:17 +0900597static const char *sata_spd_string(unsigned int spd)
598{
599 static const char * const spd_str[] = {
600 "1.5 Gbps",
601 "3.0 Gbps",
602 };
603
604 if (spd == 0 || (spd - 1) >= ARRAY_SIZE(spd_str))
605 return "<unknown>";
606 return spd_str[spd - 1];
607}
608
Tejun Heo3373efd2006-05-15 20:57:53 +0900609void ata_dev_disable(struct ata_device *dev)
Tejun Heo0b8efb02006-03-24 15:25:31 +0900610{
Tejun Heo09d7f9b2007-06-25 23:34:02 +0900611 if (ata_dev_enabled(dev)) {
Tejun Heo9af5c9c2007-08-06 18:36:22 +0900612 if (ata_msg_drv(dev->link->ap))
Tejun Heo09d7f9b2007-06-25 23:34:02 +0900613 ata_dev_printk(dev, KERN_WARNING, "disabled\n");
Tejun Heo4ae72a12007-02-02 16:22:30 +0900614 ata_down_xfermask_limit(dev, ATA_DNXFER_FORCE_PIO0 |
615 ATA_DNXFER_QUIET);
Tejun Heo0b8efb02006-03-24 15:25:31 +0900616 dev->class++;
617 }
618}
619
Linus Torvalds1da177e2005-04-16 15:20:36 -0700620/**
Linus Torvalds1da177e2005-04-16 15:20:36 -0700621 * ata_devchk - PATA device presence detection
622 * @ap: ATA channel to examine
623 * @device: Device to examine (starting at zero)
624 *
Tejun Heo0d5ff562007-02-01 15:06:36 +0900625 * This technique was originally described in
626 * Hale Landis's ATADRVR (www.ata-atapi.com), and
627 * later found its way into the ATA/ATAPI spec.
628 *
629 * Write a pattern to the ATA shadow registers,
630 * and if a device is present, it will respond by
631 * correctly storing and echoing back the
632 * ATA shadow register contents.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700633 *
634 * LOCKING:
635 * caller.
636 */
637
Tejun Heo0d5ff562007-02-01 15:06:36 +0900638static unsigned int ata_devchk(struct ata_port *ap, unsigned int device)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700639{
Tejun Heo0d5ff562007-02-01 15:06:36 +0900640 struct ata_ioports *ioaddr = &ap->ioaddr;
641 u8 nsect, lbal;
642
643 ap->ops->dev_select(ap, device);
644
645 iowrite8(0x55, ioaddr->nsect_addr);
646 iowrite8(0xaa, ioaddr->lbal_addr);
647
648 iowrite8(0xaa, ioaddr->nsect_addr);
649 iowrite8(0x55, ioaddr->lbal_addr);
650
651 iowrite8(0x55, ioaddr->nsect_addr);
652 iowrite8(0xaa, ioaddr->lbal_addr);
653
654 nsect = ioread8(ioaddr->nsect_addr);
655 lbal = ioread8(ioaddr->lbal_addr);
656
657 if ((nsect == 0x55) && (lbal == 0xaa))
658 return 1; /* we found a device */
659
660 return 0; /* nothing found */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700661}
662
663/**
664 * ata_dev_classify - determine device type based on ATA-spec signature
665 * @tf: ATA taskfile register set for device to be identified
666 *
667 * Determine from taskfile register contents whether a device is
668 * ATA or ATAPI, as per "Signature and persistence" section
669 * of ATA/PI spec (volume 1, sect 5.14).
670 *
671 * LOCKING:
672 * None.
673 *
674 * RETURNS:
675 * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, or %ATA_DEV_UNKNOWN
676 * the event of failure.
677 */
678
Jeff Garzik057ace52005-10-22 14:27:05 -0400679unsigned int ata_dev_classify(const struct ata_taskfile *tf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700680{
681 /* Apple's open source Darwin code hints that some devices only
682 * put a proper signature into the LBA mid/high registers,
683 * So, we only check those. It's sufficient for uniqueness.
684 */
685
686 if (((tf->lbam == 0) && (tf->lbah == 0)) ||
687 ((tf->lbam == 0x3c) && (tf->lbah == 0xc3))) {
688 DPRINTK("found ATA device by sig\n");
689 return ATA_DEV_ATA;
690 }
691
692 if (((tf->lbam == 0x14) && (tf->lbah == 0xeb)) ||
693 ((tf->lbam == 0x69) && (tf->lbah == 0x96))) {
694 DPRINTK("found ATAPI device by sig\n");
695 return ATA_DEV_ATAPI;
696 }
697
698 DPRINTK("unknown device\n");
699 return ATA_DEV_UNKNOWN;
700}
701
702/**
703 * ata_dev_try_classify - Parse returned ATA device signature
Tejun Heo3f198592007-09-02 23:23:57 +0900704 * @dev: ATA device to classify (starting at zero)
705 * @present: device seems present
Tejun Heob4dc7622006-01-24 17:05:22 +0900706 * @r_err: Value of error register on completion
Linus Torvalds1da177e2005-04-16 15:20:36 -0700707 *
708 * After an event -- SRST, E.D.D., or SATA COMRESET -- occurs,
709 * an ATA/ATAPI-defined set of values is placed in the ATA
710 * shadow registers, indicating the results of device detection
711 * and diagnostics.
712 *
713 * Select the ATA device, and read the values from the ATA shadow
714 * registers. Then parse according to the Error register value,
715 * and the spec-defined values examined by ata_dev_classify().
716 *
717 * LOCKING:
718 * caller.
Tejun Heob4dc7622006-01-24 17:05:22 +0900719 *
720 * RETURNS:
721 * Device type - %ATA_DEV_ATA, %ATA_DEV_ATAPI or %ATA_DEV_NONE.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700722 */
Tejun Heo3f198592007-09-02 23:23:57 +0900723unsigned int ata_dev_try_classify(struct ata_device *dev, int present,
724 u8 *r_err)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700725{
Tejun Heo3f198592007-09-02 23:23:57 +0900726 struct ata_port *ap = dev->link->ap;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700727 struct ata_taskfile tf;
728 unsigned int class;
729 u8 err;
730
Tejun Heo3f198592007-09-02 23:23:57 +0900731 ap->ops->dev_select(ap, dev->devno);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700732
733 memset(&tf, 0, sizeof(tf));
734
Linus Torvalds1da177e2005-04-16 15:20:36 -0700735 ap->ops->tf_read(ap, &tf);
Jeff Garzik0169e282005-10-29 21:25:10 -0400736 err = tf.feature;
Tejun Heob4dc7622006-01-24 17:05:22 +0900737 if (r_err)
738 *r_err = err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700739
Alan Cox93590852006-09-12 16:55:12 +0100740 /* see if device passed diags: if master then continue and warn later */
Tejun Heo3f198592007-09-02 23:23:57 +0900741 if (err == 0 && dev->devno == 0)
Alan Cox93590852006-09-12 16:55:12 +0100742 /* diagnostic fail : do nothing _YET_ */
Tejun Heo3f198592007-09-02 23:23:57 +0900743 dev->horkage |= ATA_HORKAGE_DIAGNOSTIC;
Alan Cox93590852006-09-12 16:55:12 +0100744 else if (err == 1)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700745 /* do nothing */ ;
Tejun Heo3f198592007-09-02 23:23:57 +0900746 else if ((dev->devno == 0) && (err == 0x81))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700747 /* do nothing */ ;
748 else
Tejun Heob4dc7622006-01-24 17:05:22 +0900749 return ATA_DEV_NONE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700750
Tejun Heob4dc7622006-01-24 17:05:22 +0900751 /* determine if device is ATA or ATAPI */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700752 class = ata_dev_classify(&tf);
Tejun Heob4dc7622006-01-24 17:05:22 +0900753
Linus Torvalds1da177e2005-04-16 15:20:36 -0700754 if (class == ATA_DEV_UNKNOWN)
Tejun Heob4dc7622006-01-24 17:05:22 +0900755 return ATA_DEV_NONE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700756 if ((class == ATA_DEV_ATA) && (ata_chk_status(ap) == 0))
Tejun Heob4dc7622006-01-24 17:05:22 +0900757 return ATA_DEV_NONE;
758 return class;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700759}
760
761/**
Tejun Heo6a62a042006-02-13 10:02:46 +0900762 * ata_id_string - Convert IDENTIFY DEVICE page into string
Linus Torvalds1da177e2005-04-16 15:20:36 -0700763 * @id: IDENTIFY DEVICE results we will examine
764 * @s: string into which data is output
765 * @ofs: offset into identify device page
766 * @len: length of string to return. must be an even number.
767 *
768 * The strings in the IDENTIFY DEVICE page are broken up into
769 * 16-bit chunks. Run through the string, and output each
770 * 8-bit chunk linearly, regardless of platform.
771 *
772 * LOCKING:
773 * caller.
774 */
775
Tejun Heo6a62a042006-02-13 10:02:46 +0900776void ata_id_string(const u16 *id, unsigned char *s,
777 unsigned int ofs, unsigned int len)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700778{
779 unsigned int c;
780
781 while (len > 0) {
782 c = id[ofs] >> 8;
783 *s = c;
784 s++;
785
786 c = id[ofs] & 0xff;
787 *s = c;
788 s++;
789
790 ofs++;
791 len -= 2;
792 }
793}
794
Tejun Heo0e949ff2006-02-12 22:47:04 +0900795/**
Tejun Heo6a62a042006-02-13 10:02:46 +0900796 * ata_id_c_string - Convert IDENTIFY DEVICE page into C string
Tejun Heo0e949ff2006-02-12 22:47:04 +0900797 * @id: IDENTIFY DEVICE results we will examine
798 * @s: string into which data is output
799 * @ofs: offset into identify device page
800 * @len: length of string to return. must be an odd number.
801 *
Tejun Heo6a62a042006-02-13 10:02:46 +0900802 * This function is identical to ata_id_string except that it
Tejun Heo0e949ff2006-02-12 22:47:04 +0900803 * trims trailing spaces and terminates the resulting string with
804 * null. @len must be actual maximum length (even number) + 1.
805 *
806 * LOCKING:
807 * caller.
808 */
Tejun Heo6a62a042006-02-13 10:02:46 +0900809void ata_id_c_string(const u16 *id, unsigned char *s,
810 unsigned int ofs, unsigned int len)
Tejun Heo0e949ff2006-02-12 22:47:04 +0900811{
812 unsigned char *p;
813
814 WARN_ON(!(len & 1));
815
Tejun Heo6a62a042006-02-13 10:02:46 +0900816 ata_id_string(id, s, ofs, len - 1);
Tejun Heo0e949ff2006-02-12 22:47:04 +0900817
818 p = s + strnlen(s, len - 1);
819 while (p > s && p[-1] == ' ')
820 p--;
821 *p = '\0';
822}
Edward Falk0baab862005-06-02 18:17:13 -0400823
Tejun Heodb6f8752007-09-03 12:31:58 +0900824static u64 ata_id_n_sectors(const u16 *id)
825{
826 if (ata_id_has_lba(id)) {
827 if (ata_id_has_lba48(id))
828 return ata_id_u64(id, 100);
829 else
830 return ata_id_u32(id, 60);
831 } else {
832 if (ata_id_current_chs_valid(id))
833 return ata_id_u32(id, 57);
834 else
835 return id[1] * id[3] * id[6];
836 }
837}
838
Alan Cox1e999732007-04-11 00:23:13 +0100839static u64 ata_tf_to_lba48(struct ata_taskfile *tf)
840{
841 u64 sectors = 0;
842
843 sectors |= ((u64)(tf->hob_lbah & 0xff)) << 40;
844 sectors |= ((u64)(tf->hob_lbam & 0xff)) << 32;
845 sectors |= (tf->hob_lbal & 0xff) << 24;
846 sectors |= (tf->lbah & 0xff) << 16;
847 sectors |= (tf->lbam & 0xff) << 8;
848 sectors |= (tf->lbal & 0xff);
849
850 return ++sectors;
851}
852
853static u64 ata_tf_to_lba(struct ata_taskfile *tf)
854{
855 u64 sectors = 0;
856
857 sectors |= (tf->device & 0x0f) << 24;
858 sectors |= (tf->lbah & 0xff) << 16;
859 sectors |= (tf->lbam & 0xff) << 8;
860 sectors |= (tf->lbal & 0xff);
861
862 return ++sectors;
863}
864
865/**
Tejun Heoc728a912007-09-03 12:32:30 +0900866 * ata_read_native_max_address - Read native max address
867 * @dev: target device
868 * @max_sectors: out parameter for the result native max address
Alan Cox1e999732007-04-11 00:23:13 +0100869 *
Tejun Heoc728a912007-09-03 12:32:30 +0900870 * Perform an LBA48 or LBA28 native size query upon the device in
871 * question.
872 *
873 * RETURNS:
874 * 0 on success, -EACCES if command is aborted by the drive.
875 * -EIO on other errors.
Alan Cox1e999732007-04-11 00:23:13 +0100876 */
Tejun Heoc728a912007-09-03 12:32:30 +0900877static int ata_read_native_max_address(struct ata_device *dev, u64 *max_sectors)
Alan Cox1e999732007-04-11 00:23:13 +0100878{
Tejun Heoc728a912007-09-03 12:32:30 +0900879 unsigned int err_mask;
Alan Cox1e999732007-04-11 00:23:13 +0100880 struct ata_taskfile tf;
Tejun Heoc728a912007-09-03 12:32:30 +0900881 int lba48 = ata_id_has_lba48(dev->id);
Alan Cox1e999732007-04-11 00:23:13 +0100882
883 ata_tf_init(dev, &tf);
884
Tejun Heoc728a912007-09-03 12:32:30 +0900885 /* always clear all address registers */
Alan Cox1e999732007-04-11 00:23:13 +0100886 tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
Tejun Heoc728a912007-09-03 12:32:30 +0900887
888 if (lba48) {
889 tf.command = ATA_CMD_READ_NATIVE_MAX_EXT;
890 tf.flags |= ATA_TFLAG_LBA48;
891 } else
892 tf.command = ATA_CMD_READ_NATIVE_MAX;
893
Alan Cox1e999732007-04-11 00:23:13 +0100894 tf.protocol |= ATA_PROT_NODATA;
Tejun Heoc728a912007-09-03 12:32:30 +0900895 tf.device |= ATA_LBA;
Alan Cox1e999732007-04-11 00:23:13 +0100896
Tejun Heoc728a912007-09-03 12:32:30 +0900897 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0);
898 if (err_mask) {
899 ata_dev_printk(dev, KERN_WARNING, "failed to read native "
900 "max address (err_mask=0x%x)\n", err_mask);
901 if (err_mask == AC_ERR_DEV && (tf.feature & ATA_ABORTED))
902 return -EACCES;
903 return -EIO;
904 }
Alan Cox1e999732007-04-11 00:23:13 +0100905
Tejun Heoc728a912007-09-03 12:32:30 +0900906 if (lba48)
907 *max_sectors = ata_tf_to_lba48(&tf);
908 else
909 *max_sectors = ata_tf_to_lba(&tf);
910
911 return 0;
Alan Cox1e999732007-04-11 00:23:13 +0100912}
913
914/**
Tejun Heoc728a912007-09-03 12:32:30 +0900915 * ata_set_max_sectors - Set max sectors
916 * @dev: target device
Randy Dunlap6b38d1d2007-05-01 17:35:55 -0700917 * @new_sectors: new max sectors value to set for the device
Alan Cox1e999732007-04-11 00:23:13 +0100918 *
Tejun Heoc728a912007-09-03 12:32:30 +0900919 * Set max sectors of @dev to @new_sectors.
920 *
921 * RETURNS:
922 * 0 on success, -EACCES if command is aborted or denied (due to
923 * previous non-volatile SET_MAX) by the drive. -EIO on other
924 * errors.
Alan Cox1e999732007-04-11 00:23:13 +0100925 */
Tejun Heo05027ad2007-09-03 12:32:57 +0900926static int ata_set_max_sectors(struct ata_device *dev, u64 new_sectors)
Alan Cox1e999732007-04-11 00:23:13 +0100927{
Tejun Heoc728a912007-09-03 12:32:30 +0900928 unsigned int err_mask;
Alan Cox1e999732007-04-11 00:23:13 +0100929 struct ata_taskfile tf;
Tejun Heoc728a912007-09-03 12:32:30 +0900930 int lba48 = ata_id_has_lba48(dev->id);
Alan Cox1e999732007-04-11 00:23:13 +0100931
932 new_sectors--;
933
934 ata_tf_init(dev, &tf);
935
Alan Cox1e999732007-04-11 00:23:13 +0100936 tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
Tejun Heoc728a912007-09-03 12:32:30 +0900937
938 if (lba48) {
939 tf.command = ATA_CMD_SET_MAX_EXT;
940 tf.flags |= ATA_TFLAG_LBA48;
941
942 tf.hob_lbal = (new_sectors >> 24) & 0xff;
943 tf.hob_lbam = (new_sectors >> 32) & 0xff;
944 tf.hob_lbah = (new_sectors >> 40) & 0xff;
945 } else
946 tf.command = ATA_CMD_SET_MAX;
947
Alan Cox1e999732007-04-11 00:23:13 +0100948 tf.protocol |= ATA_PROT_NODATA;
Tejun Heoc728a912007-09-03 12:32:30 +0900949 tf.device |= ATA_LBA;
Alan Cox1e999732007-04-11 00:23:13 +0100950
951 tf.lbal = (new_sectors >> 0) & 0xff;
952 tf.lbam = (new_sectors >> 8) & 0xff;
953 tf.lbah = (new_sectors >> 16) & 0xff;
Alan Cox1e999732007-04-11 00:23:13 +0100954
Tejun Heoc728a912007-09-03 12:32:30 +0900955 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0);
956 if (err_mask) {
957 ata_dev_printk(dev, KERN_WARNING, "failed to set "
958 "max address (err_mask=0x%x)\n", err_mask);
959 if (err_mask == AC_ERR_DEV &&
960 (tf.feature & (ATA_ABORTED | ATA_IDNF)))
961 return -EACCES;
962 return -EIO;
963 }
Alan Cox1e999732007-04-11 00:23:13 +0100964
Tejun Heoc728a912007-09-03 12:32:30 +0900965 return 0;
Alan Cox1e999732007-04-11 00:23:13 +0100966}
967
968/**
969 * ata_hpa_resize - Resize a device with an HPA set
970 * @dev: Device to resize
971 *
972 * Read the size of an LBA28 or LBA48 disk with HPA features and resize
973 * it if required to the full size of the media. The caller must check
974 * the drive has the HPA feature set enabled.
Tejun Heo05027ad2007-09-03 12:32:57 +0900975 *
976 * RETURNS:
977 * 0 on success, -errno on failure.
Alan Cox1e999732007-04-11 00:23:13 +0100978 */
Tejun Heo05027ad2007-09-03 12:32:57 +0900979static int ata_hpa_resize(struct ata_device *dev)
Alan Cox1e999732007-04-11 00:23:13 +0100980{
Tejun Heo05027ad2007-09-03 12:32:57 +0900981 struct ata_eh_context *ehc = &dev->link->eh_context;
982 int print_info = ehc->i.flags & ATA_EHI_PRINTINFO;
983 u64 sectors = ata_id_n_sectors(dev->id);
984 u64 native_sectors;
Tejun Heoc728a912007-09-03 12:32:30 +0900985 int rc;
Jeff Garzika617c092007-05-21 20:14:23 -0400986
Tejun Heo05027ad2007-09-03 12:32:57 +0900987 /* do we need to do it? */
988 if (dev->class != ATA_DEV_ATA ||
989 !ata_id_has_lba(dev->id) || !ata_id_hpa_enabled(dev->id) ||
990 (dev->horkage & ATA_HORKAGE_BROKEN_HPA))
Tejun Heoc728a912007-09-03 12:32:30 +0900991 return 0;
Alan Cox1e999732007-04-11 00:23:13 +0100992
Tejun Heo05027ad2007-09-03 12:32:57 +0900993 /* read native max address */
994 rc = ata_read_native_max_address(dev, &native_sectors);
995 if (rc) {
996 /* If HPA isn't going to be unlocked, skip HPA
997 * resizing from the next try.
998 */
999 if (!ata_ignore_hpa) {
1000 ata_dev_printk(dev, KERN_WARNING, "HPA support seems "
1001 "broken, will skip HPA handling\n");
1002 dev->horkage |= ATA_HORKAGE_BROKEN_HPA;
Alan Cox1e999732007-04-11 00:23:13 +01001003
Tejun Heo05027ad2007-09-03 12:32:57 +09001004 /* we can continue if device aborted the command */
1005 if (rc == -EACCES)
1006 rc = 0;
Alan Cox1e999732007-04-11 00:23:13 +01001007 }
Tejun Heo37301a52007-06-25 20:45:54 +09001008
Tejun Heo05027ad2007-09-03 12:32:57 +09001009 return rc;
1010 }
1011
1012 /* nothing to do? */
1013 if (native_sectors <= sectors || !ata_ignore_hpa) {
1014 if (!print_info || native_sectors == sectors)
1015 return 0;
1016
1017 if (native_sectors > sectors)
1018 ata_dev_printk(dev, KERN_INFO,
1019 "HPA detected: current %llu, native %llu\n",
1020 (unsigned long long)sectors,
1021 (unsigned long long)native_sectors);
1022 else if (native_sectors < sectors)
1023 ata_dev_printk(dev, KERN_WARNING,
1024 "native sectors (%llu) is smaller than "
1025 "sectors (%llu)\n",
1026 (unsigned long long)native_sectors,
1027 (unsigned long long)sectors);
1028 return 0;
1029 }
1030
1031 /* let's unlock HPA */
1032 rc = ata_set_max_sectors(dev, native_sectors);
1033 if (rc == -EACCES) {
1034 /* if device aborted the command, skip HPA resizing */
1035 ata_dev_printk(dev, KERN_WARNING, "device aborted resize "
1036 "(%llu -> %llu), skipping HPA handling\n",
1037 (unsigned long long)sectors,
1038 (unsigned long long)native_sectors);
1039 dev->horkage |= ATA_HORKAGE_BROKEN_HPA;
1040 return 0;
1041 } else if (rc)
1042 return rc;
1043
1044 /* re-read IDENTIFY data */
1045 rc = ata_dev_reread_id(dev, 0);
1046 if (rc) {
1047 ata_dev_printk(dev, KERN_ERR, "failed to re-read IDENTIFY "
1048 "data after HPA resizing\n");
1049 return rc;
1050 }
1051
1052 if (print_info) {
1053 u64 new_sectors = ata_id_n_sectors(dev->id);
1054 ata_dev_printk(dev, KERN_INFO,
1055 "HPA unlocked: %llu -> %llu, native %llu\n",
1056 (unsigned long long)sectors,
1057 (unsigned long long)new_sectors,
1058 (unsigned long long)native_sectors);
1059 }
1060
1061 return 0;
Alan Cox1e999732007-04-11 00:23:13 +01001062}
1063
Edward Falk0baab862005-06-02 18:17:13 -04001064/**
Alan10305f02007-02-20 18:01:59 +00001065 * ata_id_to_dma_mode - Identify DMA mode from id block
1066 * @dev: device to identify
Randy Dunlapcc261262007-03-16 19:55:47 -07001067 * @unknown: mode to assume if we cannot tell
Alan10305f02007-02-20 18:01:59 +00001068 *
1069 * Set up the timing values for the device based upon the identify
1070 * reported values for the DMA mode. This function is used by drivers
1071 * which rely upon firmware configured modes, but wish to report the
1072 * mode correctly when possible.
1073 *
1074 * In addition we emit similarly formatted messages to the default
1075 * ata_dev_set_mode handler, in order to provide consistency of
1076 * presentation.
1077 */
1078
1079void ata_id_to_dma_mode(struct ata_device *dev, u8 unknown)
1080{
1081 unsigned int mask;
1082 u8 mode;
1083
1084 /* Pack the DMA modes */
1085 mask = ((dev->id[63] >> 8) << ATA_SHIFT_MWDMA) & ATA_MASK_MWDMA;
1086 if (dev->id[53] & 0x04)
1087 mask |= ((dev->id[88] >> 8) << ATA_SHIFT_UDMA) & ATA_MASK_UDMA;
1088
1089 /* Select the mode in use */
1090 mode = ata_xfer_mask2mode(mask);
1091
1092 if (mode != 0) {
1093 ata_dev_printk(dev, KERN_INFO, "configured for %s\n",
1094 ata_mode_string(mask));
1095 } else {
1096 /* SWDMA perhaps ? */
1097 mode = unknown;
1098 ata_dev_printk(dev, KERN_INFO, "configured for DMA\n");
1099 }
1100
1101 /* Configure the device reporting */
1102 dev->xfer_mode = mode;
1103 dev->xfer_shift = ata_xfer_mode2shift(mode);
1104}
1105
1106/**
Edward Falk0baab862005-06-02 18:17:13 -04001107 * ata_noop_dev_select - Select device 0/1 on ATA bus
1108 * @ap: ATA channel to manipulate
1109 * @device: ATA device (numbered from zero) to select
1110 *
1111 * This function performs no actual function.
1112 *
1113 * May be used as the dev_select() entry in ata_port_operations.
1114 *
1115 * LOCKING:
1116 * caller.
1117 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001118void ata_noop_dev_select (struct ata_port *ap, unsigned int device)
1119{
1120}
1121
Edward Falk0baab862005-06-02 18:17:13 -04001122
Linus Torvalds1da177e2005-04-16 15:20:36 -07001123/**
1124 * ata_std_dev_select - Select device 0/1 on ATA bus
1125 * @ap: ATA channel to manipulate
1126 * @device: ATA device (numbered from zero) to select
1127 *
1128 * Use the method defined in the ATA specification to
1129 * make either device 0, or device 1, active on the
Edward Falk0baab862005-06-02 18:17:13 -04001130 * ATA channel. Works with both PIO and MMIO.
1131 *
1132 * May be used as the dev_select() entry in ata_port_operations.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001133 *
1134 * LOCKING:
1135 * caller.
1136 */
1137
1138void ata_std_dev_select (struct ata_port *ap, unsigned int device)
1139{
1140 u8 tmp;
1141
1142 if (device == 0)
1143 tmp = ATA_DEVICE_OBS;
1144 else
1145 tmp = ATA_DEVICE_OBS | ATA_DEV1;
1146
Tejun Heo0d5ff562007-02-01 15:06:36 +09001147 iowrite8(tmp, ap->ioaddr.device_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001148 ata_pause(ap); /* needed; also flushes, for mmio */
1149}
1150
1151/**
1152 * ata_dev_select - Select device 0/1 on ATA bus
1153 * @ap: ATA channel to manipulate
1154 * @device: ATA device (numbered from zero) to select
1155 * @wait: non-zero to wait for Status register BSY bit to clear
1156 * @can_sleep: non-zero if context allows sleeping
1157 *
1158 * Use the method defined in the ATA specification to
1159 * make either device 0, or device 1, active on the
1160 * ATA channel.
1161 *
1162 * This is a high-level version of ata_std_dev_select(),
1163 * which additionally provides the services of inserting
1164 * the proper pauses and status polling, where needed.
1165 *
1166 * LOCKING:
1167 * caller.
1168 */
1169
1170void ata_dev_select(struct ata_port *ap, unsigned int device,
1171 unsigned int wait, unsigned int can_sleep)
1172{
Tejun Heo88574552006-06-25 20:00:35 +09001173 if (ata_msg_probe(ap))
Tejun Heo44877b42007-02-21 01:06:51 +09001174 ata_port_printk(ap, KERN_INFO, "ata_dev_select: ENTER, "
1175 "device %u, wait %u\n", device, wait);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001176
1177 if (wait)
1178 ata_wait_idle(ap);
1179
1180 ap->ops->dev_select(ap, device);
1181
1182 if (wait) {
Tejun Heo9af5c9c2007-08-06 18:36:22 +09001183 if (can_sleep && ap->link.device[device].class == ATA_DEV_ATAPI)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001184 msleep(150);
1185 ata_wait_idle(ap);
1186 }
1187}
1188
1189/**
1190 * ata_dump_id - IDENTIFY DEVICE info debugging output
Tejun Heo0bd33002006-02-12 22:47:05 +09001191 * @id: IDENTIFY DEVICE page to dump
Linus Torvalds1da177e2005-04-16 15:20:36 -07001192 *
Tejun Heo0bd33002006-02-12 22:47:05 +09001193 * Dump selected 16-bit words from the given IDENTIFY DEVICE
1194 * page.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001195 *
1196 * LOCKING:
1197 * caller.
1198 */
1199
Tejun Heo0bd33002006-02-12 22:47:05 +09001200static inline void ata_dump_id(const u16 *id)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001201{
1202 DPRINTK("49==0x%04x "
1203 "53==0x%04x "
1204 "63==0x%04x "
1205 "64==0x%04x "
1206 "75==0x%04x \n",
Tejun Heo0bd33002006-02-12 22:47:05 +09001207 id[49],
1208 id[53],
1209 id[63],
1210 id[64],
1211 id[75]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001212 DPRINTK("80==0x%04x "
1213 "81==0x%04x "
1214 "82==0x%04x "
1215 "83==0x%04x "
1216 "84==0x%04x \n",
Tejun Heo0bd33002006-02-12 22:47:05 +09001217 id[80],
1218 id[81],
1219 id[82],
1220 id[83],
1221 id[84]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001222 DPRINTK("88==0x%04x "
1223 "93==0x%04x\n",
Tejun Heo0bd33002006-02-12 22:47:05 +09001224 id[88],
1225 id[93]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001226}
1227
Tejun Heocb95d562006-03-06 04:31:56 +09001228/**
1229 * ata_id_xfermask - Compute xfermask from the given IDENTIFY data
1230 * @id: IDENTIFY data to compute xfer mask from
1231 *
1232 * Compute the xfermask for this device. This is not as trivial
1233 * as it seems if we must consider early devices correctly.
1234 *
1235 * FIXME: pre IDE drive timing (do we care ?).
1236 *
1237 * LOCKING:
1238 * None.
1239 *
1240 * RETURNS:
1241 * Computed xfermask
1242 */
1243static unsigned int ata_id_xfermask(const u16 *id)
1244{
1245 unsigned int pio_mask, mwdma_mask, udma_mask;
1246
1247 /* Usual case. Word 53 indicates word 64 is valid */
1248 if (id[ATA_ID_FIELD_VALID] & (1 << 1)) {
1249 pio_mask = id[ATA_ID_PIO_MODES] & 0x03;
1250 pio_mask <<= 3;
1251 pio_mask |= 0x7;
1252 } else {
1253 /* If word 64 isn't valid then Word 51 high byte holds
1254 * the PIO timing number for the maximum. Turn it into
1255 * a mask.
1256 */
Lennert Buytenhek7a0f1c82007-01-29 13:28:47 +01001257 u8 mode = (id[ATA_ID_OLD_PIO_MODES] >> 8) & 0xFF;
Alan Cox46767aeb2006-09-29 18:26:47 +01001258 if (mode < 5) /* Valid PIO range */
1259 pio_mask = (2 << mode) - 1;
1260 else
1261 pio_mask = 1;
Tejun Heocb95d562006-03-06 04:31:56 +09001262
1263 /* But wait.. there's more. Design your standards by
1264 * committee and you too can get a free iordy field to
1265 * process. However its the speeds not the modes that
1266 * are supported... Note drivers using the timing API
1267 * will get this right anyway
1268 */
1269 }
1270
1271 mwdma_mask = id[ATA_ID_MWDMA_MODES] & 0x07;
Tejun Heofb21f0d2006-03-12 12:34:35 +09001272
Alan Coxb352e572006-08-10 18:52:12 +01001273 if (ata_id_is_cfa(id)) {
1274 /*
1275 * Process compact flash extended modes
1276 */
1277 int pio = id[163] & 0x7;
1278 int dma = (id[163] >> 3) & 7;
1279
1280 if (pio)
1281 pio_mask |= (1 << 5);
1282 if (pio > 1)
1283 pio_mask |= (1 << 6);
1284 if (dma)
1285 mwdma_mask |= (1 << 3);
1286 if (dma > 1)
1287 mwdma_mask |= (1 << 4);
1288 }
1289
Tejun Heofb21f0d2006-03-12 12:34:35 +09001290 udma_mask = 0;
1291 if (id[ATA_ID_FIELD_VALID] & (1 << 2))
1292 udma_mask = id[ATA_ID_UDMA_MODES] & 0xff;
Tejun Heocb95d562006-03-06 04:31:56 +09001293
1294 return ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask);
1295}
1296
Tejun Heo86e45b62006-03-05 15:29:09 +09001297/**
1298 * ata_port_queue_task - Queue port_task
1299 * @ap: The ata_port to queue port_task for
Randy Dunlape2a7f772006-05-18 10:50:18 -07001300 * @fn: workqueue function to be scheduled
David Howells65f27f32006-11-22 14:55:48 +00001301 * @data: data for @fn to use
Randy Dunlape2a7f772006-05-18 10:50:18 -07001302 * @delay: delay time for workqueue function
Tejun Heo86e45b62006-03-05 15:29:09 +09001303 *
1304 * Schedule @fn(@data) for execution after @delay jiffies using
1305 * port_task. There is one port_task per port and it's the
1306 * user(low level driver)'s responsibility to make sure that only
1307 * one task is active at any given time.
1308 *
1309 * libata core layer takes care of synchronization between
1310 * port_task and EH. ata_port_queue_task() may be ignored for EH
1311 * synchronization.
1312 *
1313 * LOCKING:
1314 * Inherited from caller.
1315 */
David Howells65f27f32006-11-22 14:55:48 +00001316void ata_port_queue_task(struct ata_port *ap, work_func_t fn, void *data,
Tejun Heo86e45b62006-03-05 15:29:09 +09001317 unsigned long delay)
1318{
David Howells65f27f32006-11-22 14:55:48 +00001319 PREPARE_DELAYED_WORK(&ap->port_task, fn);
1320 ap->port_task_data = data;
Tejun Heo86e45b62006-03-05 15:29:09 +09001321
Oleg Nesterov45a66c12007-07-09 11:46:13 -07001322 /* may fail if ata_port_flush_task() in progress */
1323 queue_delayed_work(ata_wq, &ap->port_task, delay);
Tejun Heo86e45b62006-03-05 15:29:09 +09001324}
1325
1326/**
1327 * ata_port_flush_task - Flush port_task
1328 * @ap: The ata_port to flush port_task for
1329 *
1330 * After this function completes, port_task is guranteed not to
1331 * be running or scheduled.
1332 *
1333 * LOCKING:
1334 * Kernel thread context (may sleep)
1335 */
1336void ata_port_flush_task(struct ata_port *ap)
1337{
Tejun Heo86e45b62006-03-05 15:29:09 +09001338 DPRINTK("ENTER\n");
1339
Oleg Nesterov45a66c12007-07-09 11:46:13 -07001340 cancel_rearming_delayed_work(&ap->port_task);
Tejun Heo86e45b62006-03-05 15:29:09 +09001341
Borislav Petkov0dd4b212006-06-23 02:29:08 -04001342 if (ata_msg_ctl(ap))
1343 ata_port_printk(ap, KERN_DEBUG, "%s: EXIT\n", __FUNCTION__);
Tejun Heo86e45b62006-03-05 15:29:09 +09001344}
1345
Adrian Bunk7102d232007-01-04 00:09:36 +01001346static void ata_qc_complete_internal(struct ata_queued_cmd *qc)
Tejun Heoa2a7a662005-12-13 14:48:31 +09001347{
Tejun Heo77853bf2006-01-23 13:09:36 +09001348 struct completion *waiting = qc->private_data;
Tejun Heoa2a7a662005-12-13 14:48:31 +09001349
Tejun Heoa2a7a662005-12-13 14:48:31 +09001350 complete(waiting);
Tejun Heoa2a7a662005-12-13 14:48:31 +09001351}
1352
1353/**
Tejun Heo24326972006-11-14 22:47:09 +09001354 * ata_exec_internal_sg - execute libata internal command
Tejun Heoa2a7a662005-12-13 14:48:31 +09001355 * @dev: Device to which the command is sent
1356 * @tf: Taskfile registers for the command and the result
Tejun Heod69cf372006-04-02 18:51:53 +09001357 * @cdb: CDB for packet command
Tejun Heoa2a7a662005-12-13 14:48:31 +09001358 * @dma_dir: Data tranfer direction of the command
Tejun Heo24326972006-11-14 22:47:09 +09001359 * @sg: sg list for the data buffer of the command
1360 * @n_elem: Number of sg entries
Tejun Heoa2a7a662005-12-13 14:48:31 +09001361 *
1362 * Executes libata internal command with timeout. @tf contains
1363 * command on entry and result on return. Timeout and error
1364 * conditions are reported via return value. No recovery action
1365 * is taken after a command times out. It's caller's duty to
1366 * clean up after timeout.
1367 *
1368 * LOCKING:
1369 * None. Should be called with kernel context, might sleep.
Tejun Heo551e8882006-06-12 14:09:49 +09001370 *
1371 * RETURNS:
1372 * Zero on success, AC_ERR_* mask on failure
Tejun Heoa2a7a662005-12-13 14:48:31 +09001373 */
Tejun Heo24326972006-11-14 22:47:09 +09001374unsigned ata_exec_internal_sg(struct ata_device *dev,
1375 struct ata_taskfile *tf, const u8 *cdb,
1376 int dma_dir, struct scatterlist *sg,
1377 unsigned int n_elem)
Tejun Heoa2a7a662005-12-13 14:48:31 +09001378{
Tejun Heo9af5c9c2007-08-06 18:36:22 +09001379 struct ata_link *link = dev->link;
1380 struct ata_port *ap = link->ap;
Tejun Heoa2a7a662005-12-13 14:48:31 +09001381 u8 command = tf->command;
1382 struct ata_queued_cmd *qc;
Tejun Heo2ab7db12006-05-15 20:58:02 +09001383 unsigned int tag, preempted_tag;
Tejun Heodedaf2b2006-05-15 21:03:43 +09001384 u32 preempted_sactive, preempted_qc_active;
Ingo Molnar60be6b92006-07-03 00:25:26 -07001385 DECLARE_COMPLETION_ONSTACK(wait);
Tejun Heoa2a7a662005-12-13 14:48:31 +09001386 unsigned long flags;
Tejun Heo77853bf2006-01-23 13:09:36 +09001387 unsigned int err_mask;
Tejun Heod95a7172006-05-15 20:58:14 +09001388 int rc;
Tejun Heoa2a7a662005-12-13 14:48:31 +09001389
Jeff Garzikba6a1302006-06-22 23:46:10 -04001390 spin_lock_irqsave(ap->lock, flags);
Tejun Heoa2a7a662005-12-13 14:48:31 +09001391
Tejun Heoe3180492006-05-15 20:58:09 +09001392 /* no internal command while frozen */
Tejun Heob51e9e52006-06-29 01:29:30 +09001393 if (ap->pflags & ATA_PFLAG_FROZEN) {
Jeff Garzikba6a1302006-06-22 23:46:10 -04001394 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heoe3180492006-05-15 20:58:09 +09001395 return AC_ERR_SYSTEM;
1396 }
1397
Tejun Heo2ab7db12006-05-15 20:58:02 +09001398 /* initialize internal qc */
Tejun Heoa2a7a662005-12-13 14:48:31 +09001399
Tejun Heo2ab7db12006-05-15 20:58:02 +09001400 /* XXX: Tag 0 is used for drivers with legacy EH as some
1401 * drivers choke if any other tag is given. This breaks
1402 * ata_tag_internal() test for those drivers. Don't use new
1403 * EH stuff without converting to it.
1404 */
1405 if (ap->ops->error_handler)
1406 tag = ATA_TAG_INTERNAL;
1407 else
1408 tag = 0;
1409
Tejun Heo6cec4a32006-05-15 21:03:41 +09001410 if (test_and_set_bit(tag, &ap->qc_allocated))
Tejun Heo2ab7db12006-05-15 20:58:02 +09001411 BUG();
Tejun Heof69499f2006-05-15 20:58:03 +09001412 qc = __ata_qc_from_tag(ap, tag);
Tejun Heo2ab7db12006-05-15 20:58:02 +09001413
1414 qc->tag = tag;
1415 qc->scsicmd = NULL;
1416 qc->ap = ap;
1417 qc->dev = dev;
1418 ata_qc_reinit(qc);
1419
Tejun Heo9af5c9c2007-08-06 18:36:22 +09001420 preempted_tag = link->active_tag;
1421 preempted_sactive = link->sactive;
Tejun Heodedaf2b2006-05-15 21:03:43 +09001422 preempted_qc_active = ap->qc_active;
Tejun Heo9af5c9c2007-08-06 18:36:22 +09001423 link->active_tag = ATA_TAG_POISON;
1424 link->sactive = 0;
Tejun Heodedaf2b2006-05-15 21:03:43 +09001425 ap->qc_active = 0;
Tejun Heo2ab7db12006-05-15 20:58:02 +09001426
1427 /* prepare & issue qc */
Tejun Heoa2a7a662005-12-13 14:48:31 +09001428 qc->tf = *tf;
Tejun Heod69cf372006-04-02 18:51:53 +09001429 if (cdb)
1430 memcpy(qc->cdb, cdb, ATAPI_CDB_LEN);
Tejun Heoe61e0672006-05-15 20:57:40 +09001431 qc->flags |= ATA_QCFLAG_RESULT_TF;
Tejun Heoa2a7a662005-12-13 14:48:31 +09001432 qc->dma_dir = dma_dir;
1433 if (dma_dir != DMA_NONE) {
Tejun Heo24326972006-11-14 22:47:09 +09001434 unsigned int i, buflen = 0;
1435
1436 for (i = 0; i < n_elem; i++)
1437 buflen += sg[i].length;
1438
1439 ata_sg_init(qc, sg, n_elem);
Brian King49c80422007-01-30 11:32:26 -06001440 qc->nbytes = buflen;
Tejun Heoa2a7a662005-12-13 14:48:31 +09001441 }
1442
Tejun Heo77853bf2006-01-23 13:09:36 +09001443 qc->private_data = &wait;
Tejun Heoa2a7a662005-12-13 14:48:31 +09001444 qc->complete_fn = ata_qc_complete_internal;
1445
Tejun Heo8e0e6942006-03-31 20:41:11 +09001446 ata_qc_issue(qc);
Tejun Heoa2a7a662005-12-13 14:48:31 +09001447
Jeff Garzikba6a1302006-06-22 23:46:10 -04001448 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heoa2a7a662005-12-13 14:48:31 +09001449
Andrew Mortona8601e52006-06-25 01:36:52 -07001450 rc = wait_for_completion_timeout(&wait, ata_probe_timeout);
Albert Lee41ade502006-03-14 11:19:04 +08001451
Tejun Heod95a7172006-05-15 20:58:14 +09001452 ata_port_flush_task(ap);
1453
1454 if (!rc) {
Jeff Garzikba6a1302006-06-22 23:46:10 -04001455 spin_lock_irqsave(ap->lock, flags);
Tejun Heoa2a7a662005-12-13 14:48:31 +09001456
1457 /* We're racing with irq here. If we lose, the
1458 * following test prevents us from completing the qc
Tejun Heod95a7172006-05-15 20:58:14 +09001459 * twice. If we win, the port is frozen and will be
1460 * cleaned up by ->post_internal_cmd().
Tejun Heoa2a7a662005-12-13 14:48:31 +09001461 */
Tejun Heo77853bf2006-01-23 13:09:36 +09001462 if (qc->flags & ATA_QCFLAG_ACTIVE) {
Tejun Heod95a7172006-05-15 20:58:14 +09001463 qc->err_mask |= AC_ERR_TIMEOUT;
1464
1465 if (ap->ops->error_handler)
1466 ata_port_freeze(ap);
1467 else
1468 ata_qc_complete(qc);
Tejun Heof15a1da2006-05-15 20:57:56 +09001469
Borislav Petkov0dd4b212006-06-23 02:29:08 -04001470 if (ata_msg_warn(ap))
1471 ata_dev_printk(dev, KERN_WARNING,
Tejun Heo88574552006-06-25 20:00:35 +09001472 "qc timeout (cmd 0x%x)\n", command);
Tejun Heoa2a7a662005-12-13 14:48:31 +09001473 }
1474
Jeff Garzikba6a1302006-06-22 23:46:10 -04001475 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heoa2a7a662005-12-13 14:48:31 +09001476 }
1477
Tejun Heod95a7172006-05-15 20:58:14 +09001478 /* do post_internal_cmd */
1479 if (ap->ops->post_internal_cmd)
1480 ap->ops->post_internal_cmd(qc);
1481
Tejun Heoa51d6442007-03-20 15:24:11 +09001482 /* perform minimal error analysis */
1483 if (qc->flags & ATA_QCFLAG_FAILED) {
1484 if (qc->result_tf.command & (ATA_ERR | ATA_DF))
1485 qc->err_mask |= AC_ERR_DEV;
1486
1487 if (!qc->err_mask)
1488 qc->err_mask |= AC_ERR_OTHER;
1489
1490 if (qc->err_mask & ~AC_ERR_OTHER)
1491 qc->err_mask &= ~AC_ERR_OTHER;
Tejun Heod95a7172006-05-15 20:58:14 +09001492 }
1493
Tejun Heo15869302006-05-15 20:57:33 +09001494 /* finish up */
Jeff Garzikba6a1302006-06-22 23:46:10 -04001495 spin_lock_irqsave(ap->lock, flags);
Tejun Heo15869302006-05-15 20:57:33 +09001496
Tejun Heoe61e0672006-05-15 20:57:40 +09001497 *tf = qc->result_tf;
Tejun Heo77853bf2006-01-23 13:09:36 +09001498 err_mask = qc->err_mask;
1499
1500 ata_qc_free(qc);
Tejun Heo9af5c9c2007-08-06 18:36:22 +09001501 link->active_tag = preempted_tag;
1502 link->sactive = preempted_sactive;
Tejun Heodedaf2b2006-05-15 21:03:43 +09001503 ap->qc_active = preempted_qc_active;
Tejun Heo77853bf2006-01-23 13:09:36 +09001504
Tejun Heo1f7dd3e92006-03-24 15:25:30 +09001505 /* XXX - Some LLDDs (sata_mv) disable port on command failure.
1506 * Until those drivers are fixed, we detect the condition
1507 * here, fail the command with AC_ERR_SYSTEM and reenable the
1508 * port.
1509 *
1510 * Note that this doesn't change any behavior as internal
1511 * command failure results in disabling the device in the
1512 * higher layer for LLDDs without new reset/EH callbacks.
1513 *
1514 * Kill the following code as soon as those drivers are fixed.
1515 */
Tejun Heo198e0fe2006-04-02 18:51:52 +09001516 if (ap->flags & ATA_FLAG_DISABLED) {
Tejun Heo1f7dd3e92006-03-24 15:25:30 +09001517 err_mask |= AC_ERR_SYSTEM;
1518 ata_port_probe(ap);
1519 }
1520
Jeff Garzikba6a1302006-06-22 23:46:10 -04001521 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heo15869302006-05-15 20:57:33 +09001522
Tejun Heo77853bf2006-01-23 13:09:36 +09001523 return err_mask;
Tejun Heoa2a7a662005-12-13 14:48:31 +09001524}
1525
Linus Torvalds1da177e2005-04-16 15:20:36 -07001526/**
Tejun Heo33480a02006-12-12 02:15:31 +09001527 * ata_exec_internal - execute libata internal command
Tejun Heo24326972006-11-14 22:47:09 +09001528 * @dev: Device to which the command is sent
1529 * @tf: Taskfile registers for the command and the result
1530 * @cdb: CDB for packet command
1531 * @dma_dir: Data tranfer direction of the command
1532 * @buf: Data buffer of the command
1533 * @buflen: Length of data buffer
1534 *
1535 * Wrapper around ata_exec_internal_sg() which takes simple
1536 * buffer instead of sg list.
1537 *
1538 * LOCKING:
1539 * None. Should be called with kernel context, might sleep.
1540 *
1541 * RETURNS:
1542 * Zero on success, AC_ERR_* mask on failure
1543 */
1544unsigned ata_exec_internal(struct ata_device *dev,
1545 struct ata_taskfile *tf, const u8 *cdb,
1546 int dma_dir, void *buf, unsigned int buflen)
1547{
Tejun Heo33480a02006-12-12 02:15:31 +09001548 struct scatterlist *psg = NULL, sg;
1549 unsigned int n_elem = 0;
Tejun Heo24326972006-11-14 22:47:09 +09001550
Tejun Heo33480a02006-12-12 02:15:31 +09001551 if (dma_dir != DMA_NONE) {
1552 WARN_ON(!buf);
1553 sg_init_one(&sg, buf, buflen);
1554 psg = &sg;
1555 n_elem++;
1556 }
Tejun Heo24326972006-11-14 22:47:09 +09001557
Tejun Heo33480a02006-12-12 02:15:31 +09001558 return ata_exec_internal_sg(dev, tf, cdb, dma_dir, psg, n_elem);
Tejun Heo24326972006-11-14 22:47:09 +09001559}
1560
1561/**
Tejun Heo977e6b92006-06-24 20:30:19 +09001562 * ata_do_simple_cmd - execute simple internal command
1563 * @dev: Device to which the command is sent
1564 * @cmd: Opcode to execute
1565 *
1566 * Execute a 'simple' command, that only consists of the opcode
1567 * 'cmd' itself, without filling any other registers
1568 *
1569 * LOCKING:
1570 * Kernel thread context (may sleep).
1571 *
1572 * RETURNS:
1573 * Zero on success, AC_ERR_* mask on failure
Tejun Heoe58eb582006-06-24 20:30:19 +09001574 */
Tejun Heo77b08fb2006-06-24 20:30:19 +09001575unsigned int ata_do_simple_cmd(struct ata_device *dev, u8 cmd)
Tejun Heoe58eb582006-06-24 20:30:19 +09001576{
1577 struct ata_taskfile tf;
Tejun Heoe58eb582006-06-24 20:30:19 +09001578
1579 ata_tf_init(dev, &tf);
1580
1581 tf.command = cmd;
1582 tf.flags |= ATA_TFLAG_DEVICE;
1583 tf.protocol = ATA_PROT_NODATA;
1584
Tejun Heo977e6b92006-06-24 20:30:19 +09001585 return ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0);
Tejun Heoe58eb582006-06-24 20:30:19 +09001586}
1587
Linus Torvalds1da177e2005-04-16 15:20:36 -07001588/**
Alan Cox1bc4ccf2006-01-09 17:18:14 +00001589 * ata_pio_need_iordy - check if iordy needed
1590 * @adev: ATA device
1591 *
1592 * Check if the current speed of the device requires IORDY. Used
1593 * by various controllers for chip configuration.
1594 */
Jeff Garzika617c092007-05-21 20:14:23 -04001595
Alan Cox1bc4ccf2006-01-09 17:18:14 +00001596unsigned int ata_pio_need_iordy(const struct ata_device *adev)
1597{
Alan Cox432729f2007-03-08 23:22:59 +00001598 /* Controller doesn't support IORDY. Probably a pointless check
1599 as the caller should know this */
Tejun Heo9af5c9c2007-08-06 18:36:22 +09001600 if (adev->link->ap->flags & ATA_FLAG_NO_IORDY)
Alan Cox1bc4ccf2006-01-09 17:18:14 +00001601 return 0;
Alan Cox432729f2007-03-08 23:22:59 +00001602 /* PIO3 and higher it is mandatory */
1603 if (adev->pio_mode > XFER_PIO_2)
Alan Cox1bc4ccf2006-01-09 17:18:14 +00001604 return 1;
Alan Cox432729f2007-03-08 23:22:59 +00001605 /* We turn it on when possible */
1606 if (ata_id_has_iordy(adev->id))
1607 return 1;
1608 return 0;
1609}
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05001610
Alan Cox432729f2007-03-08 23:22:59 +00001611/**
1612 * ata_pio_mask_no_iordy - Return the non IORDY mask
1613 * @adev: ATA device
1614 *
1615 * Compute the highest mode possible if we are not using iordy. Return
1616 * -1 if no iordy mode is available.
1617 */
Jeff Garzika617c092007-05-21 20:14:23 -04001618
Alan Cox432729f2007-03-08 23:22:59 +00001619static u32 ata_pio_mask_no_iordy(const struct ata_device *adev)
1620{
Alan Cox1bc4ccf2006-01-09 17:18:14 +00001621 /* If we have no drive specific rule, then PIO 2 is non IORDY */
Alan Cox1bc4ccf2006-01-09 17:18:14 +00001622 if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE */
Alan Cox432729f2007-03-08 23:22:59 +00001623 u16 pio = adev->id[ATA_ID_EIDE_PIO];
Alan Cox1bc4ccf2006-01-09 17:18:14 +00001624 /* Is the speed faster than the drive allows non IORDY ? */
1625 if (pio) {
1626 /* This is cycle times not frequency - watch the logic! */
1627 if (pio > 240) /* PIO2 is 240nS per cycle */
Alan Cox432729f2007-03-08 23:22:59 +00001628 return 3 << ATA_SHIFT_PIO;
1629 return 7 << ATA_SHIFT_PIO;
Alan Cox1bc4ccf2006-01-09 17:18:14 +00001630 }
1631 }
Alan Cox432729f2007-03-08 23:22:59 +00001632 return 3 << ATA_SHIFT_PIO;
Alan Cox1bc4ccf2006-01-09 17:18:14 +00001633}
1634
1635/**
Tejun Heo49016ac2006-02-21 02:12:11 +09001636 * ata_dev_read_id - Read ID data from the specified device
Tejun Heo49016ac2006-02-21 02:12:11 +09001637 * @dev: target device
1638 * @p_class: pointer to class of the target device (may be changed)
Tejun Heobff04642006-11-10 18:08:10 +09001639 * @flags: ATA_READID_* flags
Tejun Heofe635c72006-05-15 20:57:35 +09001640 * @id: buffer to read IDENTIFY data into
Tejun Heo49016ac2006-02-21 02:12:11 +09001641 *
1642 * Read ID data from the specified device. ATA_CMD_ID_ATA is
1643 * performed on ATA devices and ATA_CMD_ID_ATAPI on ATAPI
Tejun Heoaec5c3c2006-03-25 01:33:34 +09001644 * devices. This function also issues ATA_CMD_INIT_DEV_PARAMS
1645 * for pre-ATA4 drives.
Tejun Heo49016ac2006-02-21 02:12:11 +09001646 *
Alan Cox50a99012007-08-08 14:27:00 +01001647 * FIXME: ATA_CMD_ID_ATA is optional for early drives and right
1648 * now we abort if we hit that case.
1649 *
Tejun Heo49016ac2006-02-21 02:12:11 +09001650 * LOCKING:
1651 * Kernel thread context (may sleep)
1652 *
1653 * RETURNS:
1654 * 0 on success, -errno otherwise.
1655 */
Tejun Heoa9beec92006-05-31 18:27:44 +09001656int ata_dev_read_id(struct ata_device *dev, unsigned int *p_class,
Tejun Heobff04642006-11-10 18:08:10 +09001657 unsigned int flags, u16 *id)
Tejun Heo49016ac2006-02-21 02:12:11 +09001658{
Tejun Heo9af5c9c2007-08-06 18:36:22 +09001659 struct ata_port *ap = dev->link->ap;
Tejun Heo49016ac2006-02-21 02:12:11 +09001660 unsigned int class = *p_class;
Tejun Heo49016ac2006-02-21 02:12:11 +09001661 struct ata_taskfile tf;
1662 unsigned int err_mask = 0;
1663 const char *reason;
Tejun Heo54936f82007-05-11 14:35:29 +02001664 int may_fallback = 1, tried_spinup = 0;
Tejun Heo49016ac2006-02-21 02:12:11 +09001665 int rc;
1666
Borislav Petkov0dd4b212006-06-23 02:29:08 -04001667 if (ata_msg_ctl(ap))
Tejun Heo44877b42007-02-21 01:06:51 +09001668 ata_dev_printk(dev, KERN_DEBUG, "%s: ENTER\n", __FUNCTION__);
Tejun Heo49016ac2006-02-21 02:12:11 +09001669
Tejun Heo49016ac2006-02-21 02:12:11 +09001670 ata_dev_select(ap, dev->devno, 1, 1); /* select device 0/1 */
Tejun Heo49016ac2006-02-21 02:12:11 +09001671 retry:
Tejun Heo3373efd2006-05-15 20:57:53 +09001672 ata_tf_init(dev, &tf);
Tejun Heo49016ac2006-02-21 02:12:11 +09001673
1674 switch (class) {
1675 case ATA_DEV_ATA:
1676 tf.command = ATA_CMD_ID_ATA;
1677 break;
1678 case ATA_DEV_ATAPI:
1679 tf.command = ATA_CMD_ID_ATAPI;
1680 break;
1681 default:
1682 rc = -ENODEV;
1683 reason = "unsupported class";
1684 goto err_out;
1685 }
1686
1687 tf.protocol = ATA_PROT_PIO;
Tejun Heo81afe892007-02-07 12:37:41 -08001688
1689 /* Some devices choke if TF registers contain garbage. Make
1690 * sure those are properly initialized.
1691 */
1692 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
1693
1694 /* Device presence detection is unreliable on some
1695 * controllers. Always poll IDENTIFY if available.
1696 */
1697 tf.flags |= ATA_TFLAG_POLLING;
Tejun Heo49016ac2006-02-21 02:12:11 +09001698
Tejun Heo3373efd2006-05-15 20:57:53 +09001699 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_FROM_DEVICE,
Tejun Heo49016ac2006-02-21 02:12:11 +09001700 id, sizeof(id[0]) * ATA_ID_WORDS);
Tejun Heo49016ac2006-02-21 02:12:11 +09001701 if (err_mask) {
Tejun Heo800b3992006-12-03 21:34:13 +09001702 if (err_mask & AC_ERR_NODEV_HINT) {
Tejun Heo55a8e2c2006-11-10 18:08:10 +09001703 DPRINTK("ata%u.%d: NODEV after polling detection\n",
Tejun Heo44877b42007-02-21 01:06:51 +09001704 ap->print_id, dev->devno);
Tejun Heo55a8e2c2006-11-10 18:08:10 +09001705 return -ENOENT;
1706 }
1707
Tejun Heo54936f82007-05-11 14:35:29 +02001708 /* Device or controller might have reported the wrong
1709 * device class. Give a shot at the other IDENTIFY if
1710 * the current one is aborted by the device.
1711 */
1712 if (may_fallback &&
1713 (err_mask == AC_ERR_DEV) && (tf.feature & ATA_ABORTED)) {
1714 may_fallback = 0;
1715
1716 if (class == ATA_DEV_ATA)
1717 class = ATA_DEV_ATAPI;
1718 else
1719 class = ATA_DEV_ATA;
1720 goto retry;
1721 }
1722
Tejun Heo49016ac2006-02-21 02:12:11 +09001723 rc = -EIO;
1724 reason = "I/O error";
Tejun Heo49016ac2006-02-21 02:12:11 +09001725 goto err_out;
1726 }
1727
Tejun Heo54936f82007-05-11 14:35:29 +02001728 /* Falling back doesn't make sense if ID data was read
1729 * successfully at least once.
1730 */
1731 may_fallback = 0;
1732
Tejun Heo49016ac2006-02-21 02:12:11 +09001733 swap_buf_le16(id, ATA_ID_WORDS);
1734
Tejun Heo49016ac2006-02-21 02:12:11 +09001735 /* sanity check */
Tejun Heoa4f57492006-09-12 20:35:49 -07001736 rc = -EINVAL;
Alan Cox60700682007-06-07 16:13:55 +01001737 reason = "device reports invalid type";
Tejun Heoa4f57492006-09-12 20:35:49 -07001738
1739 if (class == ATA_DEV_ATA) {
1740 if (!ata_id_is_ata(id) && !ata_id_is_cfa(id))
1741 goto err_out;
1742 } else {
1743 if (ata_id_is_ata(id))
1744 goto err_out;
Tejun Heo49016ac2006-02-21 02:12:11 +09001745 }
1746
Mark Lord169439c2007-04-17 18:26:07 -04001747 if (!tried_spinup && (id[2] == 0x37c8 || id[2] == 0x738c)) {
1748 tried_spinup = 1;
1749 /*
1750 * Drive powered-up in standby mode, and requires a specific
1751 * SET_FEATURES spin-up subcommand before it will accept
1752 * anything other than the original IDENTIFY command.
1753 */
1754 ata_tf_init(dev, &tf);
1755 tf.command = ATA_CMD_SET_FEATURES;
1756 tf.feature = SETFEATURES_SPINUP;
1757 tf.protocol = ATA_PROT_NODATA;
1758 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
1759 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0);
Ryan Powerfb0582f92007-08-10 13:59:35 -07001760 if (err_mask && id[2] != 0x738c) {
Mark Lord169439c2007-04-17 18:26:07 -04001761 rc = -EIO;
1762 reason = "SPINUP failed";
1763 goto err_out;
1764 }
1765 /*
1766 * If the drive initially returned incomplete IDENTIFY info,
1767 * we now must reissue the IDENTIFY command.
1768 */
1769 if (id[2] == 0x37c8)
1770 goto retry;
1771 }
1772
Tejun Heobff04642006-11-10 18:08:10 +09001773 if ((flags & ATA_READID_POSTRESET) && class == ATA_DEV_ATA) {
Tejun Heo49016ac2006-02-21 02:12:11 +09001774 /*
1775 * The exact sequence expected by certain pre-ATA4 drives is:
1776 * SRST RESET
Alan Cox50a99012007-08-08 14:27:00 +01001777 * IDENTIFY (optional in early ATA)
1778 * INITIALIZE DEVICE PARAMETERS (later IDE and ATA)
Tejun Heo49016ac2006-02-21 02:12:11 +09001779 * anything else..
1780 * Some drives were very specific about that exact sequence.
Alan Cox50a99012007-08-08 14:27:00 +01001781 *
1782 * Note that ATA4 says lba is mandatory so the second check
1783 * shoud never trigger.
Tejun Heo49016ac2006-02-21 02:12:11 +09001784 */
1785 if (ata_id_major_version(id) < 4 || !ata_id_has_lba(id)) {
Tejun Heo3373efd2006-05-15 20:57:53 +09001786 err_mask = ata_dev_init_params(dev, id[3], id[6]);
Tejun Heo49016ac2006-02-21 02:12:11 +09001787 if (err_mask) {
1788 rc = -EIO;
1789 reason = "INIT_DEV_PARAMS failed";
1790 goto err_out;
1791 }
1792
1793 /* current CHS translation info (id[53-58]) might be
1794 * changed. reread the identify device info.
1795 */
Tejun Heobff04642006-11-10 18:08:10 +09001796 flags &= ~ATA_READID_POSTRESET;
Tejun Heo49016ac2006-02-21 02:12:11 +09001797 goto retry;
1798 }
1799 }
1800
1801 *p_class = class;
Tejun Heofe635c72006-05-15 20:57:35 +09001802
Tejun Heo49016ac2006-02-21 02:12:11 +09001803 return 0;
1804
1805 err_out:
Tejun Heo88574552006-06-25 20:00:35 +09001806 if (ata_msg_warn(ap))
Borislav Petkov0dd4b212006-06-23 02:29:08 -04001807 ata_dev_printk(dev, KERN_WARNING, "failed to IDENTIFY "
Tejun Heo88574552006-06-25 20:00:35 +09001808 "(%s, err_mask=0x%x)\n", reason, err_mask);
Tejun Heo49016ac2006-02-21 02:12:11 +09001809 return rc;
1810}
1811
Tejun Heo3373efd2006-05-15 20:57:53 +09001812static inline u8 ata_dev_knobble(struct ata_device *dev)
Tejun Heo4b2f3ed2006-03-01 16:09:36 +09001813{
Tejun Heo9af5c9c2007-08-06 18:36:22 +09001814 struct ata_port *ap = dev->link->ap;
1815 return ((ap->cbl == ATA_CBL_SATA) && (!ata_id_is_sata(dev->id)));
Tejun Heo4b2f3ed2006-03-01 16:09:36 +09001816}
1817
Tejun Heoa6e6ce82006-05-15 21:03:48 +09001818static void ata_dev_config_ncq(struct ata_device *dev,
1819 char *desc, size_t desc_sz)
1820{
Tejun Heo9af5c9c2007-08-06 18:36:22 +09001821 struct ata_port *ap = dev->link->ap;
Tejun Heoa6e6ce82006-05-15 21:03:48 +09001822 int hdepth = 0, ddepth = ata_id_queue_depth(dev->id);
1823
1824 if (!ata_id_has_ncq(dev->id)) {
1825 desc[0] = '\0';
1826 return;
1827 }
Tejun Heo75683fe2007-07-05 13:31:27 +09001828 if (dev->horkage & ATA_HORKAGE_NONCQ) {
Alan Cox6919a0a2006-10-27 19:08:46 -07001829 snprintf(desc, desc_sz, "NCQ (not used)");
1830 return;
1831 }
Tejun Heoa6e6ce82006-05-15 21:03:48 +09001832 if (ap->flags & ATA_FLAG_NCQ) {
Jeff Garzikcca39742006-08-24 03:19:22 -04001833 hdepth = min(ap->scsi_host->can_queue, ATA_MAX_QUEUE - 1);
Tejun Heoa6e6ce82006-05-15 21:03:48 +09001834 dev->flags |= ATA_DFLAG_NCQ;
1835 }
1836
1837 if (hdepth >= ddepth)
1838 snprintf(desc, desc_sz, "NCQ (depth %d)", ddepth);
1839 else
1840 snprintf(desc, desc_sz, "NCQ (depth %d/%d)", hdepth, ddepth);
1841}
1842
Tejun Heo49016ac2006-02-21 02:12:11 +09001843/**
Tejun Heoffeae412006-03-01 16:09:35 +09001844 * ata_dev_configure - Configure the specified ATA/ATAPI device
Tejun Heoffeae412006-03-01 16:09:35 +09001845 * @dev: Target device to configure
Linus Torvalds1da177e2005-04-16 15:20:36 -07001846 *
Tejun Heoffeae412006-03-01 16:09:35 +09001847 * Configure @dev according to @dev->id. Generic and low-level
1848 * driver specific fixups are also applied.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001849 *
1850 * LOCKING:
Tejun Heoffeae412006-03-01 16:09:35 +09001851 * Kernel thread context (may sleep)
1852 *
1853 * RETURNS:
1854 * 0 on success, -errno otherwise
Linus Torvalds1da177e2005-04-16 15:20:36 -07001855 */
Tejun Heoefdaedc2006-11-01 18:38:52 +09001856int ata_dev_configure(struct ata_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001857{
Tejun Heo9af5c9c2007-08-06 18:36:22 +09001858 struct ata_port *ap = dev->link->ap;
1859 struct ata_eh_context *ehc = &dev->link->eh_context;
Tejun Heo67465442007-05-15 03:28:16 +09001860 int print_info = ehc->i.flags & ATA_EHI_PRINTINFO;
Tejun Heo1148c3a2006-03-13 19:48:04 +09001861 const u16 *id = dev->id;
Tejun Heoff8854b2006-03-06 04:31:56 +09001862 unsigned int xfer_mask;
Alan Coxb352e572006-08-10 18:52:12 +01001863 char revbuf[7]; /* XYZ-99\0 */
Eric D. Mudama3f64f562007-01-30 23:00:40 -07001864 char fwrevbuf[ATA_ID_FW_REV_LEN+1];
1865 char modelbuf[ATA_ID_PROD_LEN+1];
Brian Kinge6d902a2006-06-28 08:30:31 -05001866 int rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001867
Borislav Petkov0dd4b212006-06-23 02:29:08 -04001868 if (!ata_dev_enabled(dev) && ata_msg_info(ap)) {
Tejun Heo44877b42007-02-21 01:06:51 +09001869 ata_dev_printk(dev, KERN_INFO, "%s: ENTER/EXIT -- nodev\n",
1870 __FUNCTION__);
Tejun Heoffeae412006-03-01 16:09:35 +09001871 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001872 }
1873
Borislav Petkov0dd4b212006-06-23 02:29:08 -04001874 if (ata_msg_probe(ap))
Tejun Heo44877b42007-02-21 01:06:51 +09001875 ata_dev_printk(dev, KERN_DEBUG, "%s: ENTER\n", __FUNCTION__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001876
Tejun Heo75683fe2007-07-05 13:31:27 +09001877 /* set horkage */
1878 dev->horkage |= ata_dev_blacklisted(dev);
1879
Tejun Heo67465442007-05-15 03:28:16 +09001880 /* let ACPI work its magic */
1881 rc = ata_acpi_on_devcfg(dev);
1882 if (rc)
1883 return rc;
Kristen Carlson Accardi08573a82006-11-10 16:14:47 -08001884
Tejun Heo05027ad2007-09-03 12:32:57 +09001885 /* massage HPA, do it early as it might change IDENTIFY data */
1886 rc = ata_hpa_resize(dev);
1887 if (rc)
1888 return rc;
1889
Tejun Heoc39f5eb2006-03-13 19:51:19 +09001890 /* print device capabilities */
Borislav Petkov0dd4b212006-06-23 02:29:08 -04001891 if (ata_msg_probe(ap))
Tejun Heo88574552006-06-25 20:00:35 +09001892 ata_dev_printk(dev, KERN_DEBUG,
1893 "%s: cfg 49:%04x 82:%04x 83:%04x 84:%04x "
1894 "85:%04x 86:%04x 87:%04x 88:%04x\n",
Borislav Petkov0dd4b212006-06-23 02:29:08 -04001895 __FUNCTION__,
Tejun Heof15a1da2006-05-15 20:57:56 +09001896 id[49], id[82], id[83], id[84],
1897 id[85], id[86], id[87], id[88]);
Tejun Heoc39f5eb2006-03-13 19:51:19 +09001898
Tejun Heo208a9932006-03-05 17:55:58 +09001899 /* initialize to-be-configured parameters */
Tejun Heoea1dd4e2006-04-02 18:51:53 +09001900 dev->flags &= ~ATA_DFLAG_CFG_MASK;
Tejun Heo208a9932006-03-05 17:55:58 +09001901 dev->max_sectors = 0;
1902 dev->cdb_len = 0;
1903 dev->n_sectors = 0;
1904 dev->cylinders = 0;
1905 dev->heads = 0;
1906 dev->sectors = 0;
1907
Linus Torvalds1da177e2005-04-16 15:20:36 -07001908 /*
1909 * common ATA, ATAPI feature tests
1910 */
1911
Tejun Heoff8854b2006-03-06 04:31:56 +09001912 /* find max transfer mode; for printk only */
Tejun Heo1148c3a2006-03-13 19:48:04 +09001913 xfer_mask = ata_id_xfermask(id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001914
Borislav Petkov0dd4b212006-06-23 02:29:08 -04001915 if (ata_msg_probe(ap))
1916 ata_dump_id(id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001917
Albert Leeef143d52007-06-05 13:01:33 +08001918 /* SCSI only uses 4-char revisions, dump full 8 chars from ATA */
1919 ata_id_c_string(dev->id, fwrevbuf, ATA_ID_FW_REV,
1920 sizeof(fwrevbuf));
1921
1922 ata_id_c_string(dev->id, modelbuf, ATA_ID_PROD,
1923 sizeof(modelbuf));
1924
Linus Torvalds1da177e2005-04-16 15:20:36 -07001925 /* ATA-specific feature tests */
1926 if (dev->class == ATA_DEV_ATA) {
Alan Coxb352e572006-08-10 18:52:12 +01001927 if (ata_id_is_cfa(id)) {
1928 if (id[162] & 1) /* CPRM may make this media unusable */
Tejun Heo44877b42007-02-21 01:06:51 +09001929 ata_dev_printk(dev, KERN_WARNING,
1930 "supports DRM functions and may "
1931 "not be fully accessable.\n");
Alan Coxb352e572006-08-10 18:52:12 +01001932 snprintf(revbuf, 7, "CFA");
1933 }
1934 else
1935 snprintf(revbuf, 7, "ATA-%d", ata_id_major_version(id));
1936
Tejun Heo1148c3a2006-03-13 19:48:04 +09001937 dev->n_sectors = ata_id_n_sectors(id);
Tejun Heo29407402006-02-12 22:47:04 +09001938
Eric D. Mudama3f64f562007-01-30 23:00:40 -07001939 if (dev->id[59] & 0x100)
1940 dev->multi_count = dev->id[59] & 0xff;
1941
Tejun Heo1148c3a2006-03-13 19:48:04 +09001942 if (ata_id_has_lba(id)) {
Tejun Heo4c2d7212006-03-05 17:55:58 +09001943 const char *lba_desc;
Tejun Heoa6e6ce82006-05-15 21:03:48 +09001944 char ncq_desc[20];
Albert Lee8bf62ece2005-05-12 15:29:42 -04001945
Tejun Heo4c2d7212006-03-05 17:55:58 +09001946 lba_desc = "LBA";
1947 dev->flags |= ATA_DFLAG_LBA;
Tejun Heo1148c3a2006-03-13 19:48:04 +09001948 if (ata_id_has_lba48(id)) {
Albert Lee8bf62ece2005-05-12 15:29:42 -04001949 dev->flags |= ATA_DFLAG_LBA48;
Tejun Heo4c2d7212006-03-05 17:55:58 +09001950 lba_desc = "LBA48";
Tejun Heo6fc49ad2006-11-11 20:10:45 +09001951
1952 if (dev->n_sectors >= (1UL << 28) &&
1953 ata_id_has_flush_ext(id))
1954 dev->flags |= ATA_DFLAG_FLUSH_EXT;
Tejun Heo4c2d7212006-03-05 17:55:58 +09001955 }
Albert Lee8bf62ece2005-05-12 15:29:42 -04001956
Tejun Heoa6e6ce82006-05-15 21:03:48 +09001957 /* config NCQ */
1958 ata_dev_config_ncq(dev, ncq_desc, sizeof(ncq_desc));
1959
Albert Lee8bf62ece2005-05-12 15:29:42 -04001960 /* print device info to dmesg */
Eric D. Mudama3f64f562007-01-30 23:00:40 -07001961 if (ata_msg_drv(ap) && print_info) {
1962 ata_dev_printk(dev, KERN_INFO,
1963 "%s: %s, %s, max %s\n",
1964 revbuf, modelbuf, fwrevbuf,
1965 ata_mode_string(xfer_mask));
1966 ata_dev_printk(dev, KERN_INFO,
1967 "%Lu sectors, multi %u: %s %s\n",
Tejun Heof15a1da2006-05-15 20:57:56 +09001968 (unsigned long long)dev->n_sectors,
Eric D. Mudama3f64f562007-01-30 23:00:40 -07001969 dev->multi_count, lba_desc, ncq_desc);
1970 }
Tejun Heoffeae412006-03-01 16:09:35 +09001971 } else {
Albert Lee8bf62ece2005-05-12 15:29:42 -04001972 /* CHS */
1973
1974 /* Default translation */
Tejun Heo1148c3a2006-03-13 19:48:04 +09001975 dev->cylinders = id[1];
1976 dev->heads = id[3];
1977 dev->sectors = id[6];
Albert Lee8bf62ece2005-05-12 15:29:42 -04001978
Tejun Heo1148c3a2006-03-13 19:48:04 +09001979 if (ata_id_current_chs_valid(id)) {
Albert Lee8bf62ece2005-05-12 15:29:42 -04001980 /* Current CHS translation is valid. */
Tejun Heo1148c3a2006-03-13 19:48:04 +09001981 dev->cylinders = id[54];
1982 dev->heads = id[55];
1983 dev->sectors = id[56];
Albert Lee8bf62ece2005-05-12 15:29:42 -04001984 }
1985
1986 /* print device info to dmesg */
Eric D. Mudama3f64f562007-01-30 23:00:40 -07001987 if (ata_msg_drv(ap) && print_info) {
Tejun Heo88574552006-06-25 20:00:35 +09001988 ata_dev_printk(dev, KERN_INFO,
Eric D. Mudama3f64f562007-01-30 23:00:40 -07001989 "%s: %s, %s, max %s\n",
1990 revbuf, modelbuf, fwrevbuf,
1991 ata_mode_string(xfer_mask));
Jeff Garzika84471f2007-02-26 05:51:33 -05001992 ata_dev_printk(dev, KERN_INFO,
Eric D. Mudama3f64f562007-01-30 23:00:40 -07001993 "%Lu sectors, multi %u, CHS %u/%u/%u\n",
1994 (unsigned long long)dev->n_sectors,
1995 dev->multi_count, dev->cylinders,
1996 dev->heads, dev->sectors);
1997 }
Albert Lee07f6f7d2005-11-01 19:33:20 +08001998 }
1999
Tejun Heo6e7846e2006-02-12 23:32:58 +09002000 dev->cdb_len = 16;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002001 }
2002
2003 /* ATAPI-specific feature tests */
Jeff Garzik2c13b7c2005-11-14 14:14:16 -05002004 else if (dev->class == ATA_DEV_ATAPI) {
Albert Lee08a556d2006-03-31 13:29:04 +08002005 char *cdb_intr_string = "";
2006
Tejun Heo1148c3a2006-03-13 19:48:04 +09002007 rc = atapi_cdb_len(id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002008 if ((rc < 12) || (rc > ATAPI_CDB_LEN)) {
Borislav Petkov0dd4b212006-06-23 02:29:08 -04002009 if (ata_msg_warn(ap))
Tejun Heo88574552006-06-25 20:00:35 +09002010 ata_dev_printk(dev, KERN_WARNING,
2011 "unsupported CDB len\n");
Tejun Heoffeae412006-03-01 16:09:35 +09002012 rc = -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002013 goto err_out_nosup;
2014 }
Tejun Heo6e7846e2006-02-12 23:32:58 +09002015 dev->cdb_len = (unsigned int) rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002016
Kristen Carlson Accardi9f45cbd2007-08-15 03:57:11 -04002017 /*
2018 * check to see if this ATAPI device supports
2019 * Asynchronous Notification
2020 */
2021 if ((ap->flags & ATA_FLAG_AN) && ata_id_has_AN(id)) {
2022 int err;
2023 /* issue SET feature command to turn this on */
2024 err = ata_dev_set_AN(dev, SETFEATURES_SATA_ENABLE);
2025 if (err)
2026 ata_dev_printk(dev, KERN_ERR,
2027 "unable to set AN, err %x\n",
2028 err);
2029 else
2030 dev->flags |= ATA_DFLAG_AN;
2031 }
2032
Albert Lee08a556d2006-03-31 13:29:04 +08002033 if (ata_id_cdb_intr(dev->id)) {
Albert Lee312f7da2005-09-27 17:38:03 +08002034 dev->flags |= ATA_DFLAG_CDB_INTR;
Albert Lee08a556d2006-03-31 13:29:04 +08002035 cdb_intr_string = ", CDB intr";
2036 }
Albert Lee312f7da2005-09-27 17:38:03 +08002037
Linus Torvalds1da177e2005-04-16 15:20:36 -07002038 /* print device info to dmesg */
Borislav Petkov5afc8142006-06-27 14:51:25 +02002039 if (ata_msg_drv(ap) && print_info)
Albert Leeef143d52007-06-05 13:01:33 +08002040 ata_dev_printk(dev, KERN_INFO,
2041 "ATAPI: %s, %s, max %s%s\n",
2042 modelbuf, fwrevbuf,
Tejun Heo12436c32006-05-15 20:59:15 +09002043 ata_mode_string(xfer_mask),
2044 cdb_intr_string);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002045 }
2046
Tejun Heo914ed352006-11-01 18:39:55 +09002047 /* determine max_sectors */
2048 dev->max_sectors = ATA_MAX_SECTORS;
2049 if (dev->flags & ATA_DFLAG_LBA48)
2050 dev->max_sectors = ATA_MAX_SECTORS_LBA48;
2051
Alan Cox93590852006-09-12 16:55:12 +01002052 if (dev->horkage & ATA_HORKAGE_DIAGNOSTIC) {
2053 /* Let the user know. We don't want to disallow opens for
2054 rescue purposes, or in case the vendor is just a blithering
2055 idiot */
2056 if (print_info) {
2057 ata_dev_printk(dev, KERN_WARNING,
2058"Drive reports diagnostics failure. This may indicate a drive\n");
2059 ata_dev_printk(dev, KERN_WARNING,
2060"fault or invalid emulation. Contact drive vendor for information.\n");
2061 }
2062 }
2063
Tejun Heo4b2f3ed2006-03-01 16:09:36 +09002064 /* limit bridge transfers to udma5, 200 sectors */
Tejun Heo3373efd2006-05-15 20:57:53 +09002065 if (ata_dev_knobble(dev)) {
Borislav Petkov5afc8142006-06-27 14:51:25 +02002066 if (ata_msg_drv(ap) && print_info)
Tejun Heof15a1da2006-05-15 20:57:56 +09002067 ata_dev_printk(dev, KERN_INFO,
2068 "applying bridge limits\n");
Tejun Heo5a529132006-03-24 14:07:50 +09002069 dev->udma_mask &= ATA_UDMA5;
Tejun Heo4b2f3ed2006-03-01 16:09:36 +09002070 dev->max_sectors = ATA_MAX_SECTORS;
2071 }
2072
Tejun Heo75683fe2007-07-05 13:31:27 +09002073 if (dev->horkage & ATA_HORKAGE_MAX_SEC_128)
Tejun Heo03ec52d2007-04-12 13:38:11 +09002074 dev->max_sectors = min_t(unsigned int, ATA_MAX_SECTORS_128,
2075 dev->max_sectors);
Albert Lee18d6e9d2007-04-02 11:34:15 +08002076
Tejun Heo4b2f3ed2006-03-01 16:09:36 +09002077 if (ap->ops->dev_config)
Alancd0d3bb2007-03-02 00:56:15 +00002078 ap->ops->dev_config(dev);
Tejun Heo4b2f3ed2006-03-01 16:09:36 +09002079
Borislav Petkov0dd4b212006-06-23 02:29:08 -04002080 if (ata_msg_probe(ap))
2081 ata_dev_printk(dev, KERN_DEBUG, "%s: EXIT, drv_stat = 0x%x\n",
2082 __FUNCTION__, ata_chk_status(ap));
Tejun Heoffeae412006-03-01 16:09:35 +09002083 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002084
2085err_out_nosup:
Borislav Petkov0dd4b212006-06-23 02:29:08 -04002086 if (ata_msg_probe(ap))
Tejun Heo88574552006-06-25 20:00:35 +09002087 ata_dev_printk(dev, KERN_DEBUG,
2088 "%s: EXIT, err\n", __FUNCTION__);
Tejun Heoffeae412006-03-01 16:09:35 +09002089 return rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002090}
2091
2092/**
Alan Cox2e41e8e2007-03-08 23:19:19 +00002093 * ata_cable_40wire - return 40 wire cable type
Alan Coxbe0d18d2007-03-06 02:37:56 -08002094 * @ap: port
2095 *
Alan Cox2e41e8e2007-03-08 23:19:19 +00002096 * Helper method for drivers which want to hardwire 40 wire cable
Alan Coxbe0d18d2007-03-06 02:37:56 -08002097 * detection.
2098 */
2099
2100int ata_cable_40wire(struct ata_port *ap)
2101{
2102 return ATA_CBL_PATA40;
2103}
2104
2105/**
Alan Cox2e41e8e2007-03-08 23:19:19 +00002106 * ata_cable_80wire - return 80 wire cable type
Alan Coxbe0d18d2007-03-06 02:37:56 -08002107 * @ap: port
2108 *
Alan Cox2e41e8e2007-03-08 23:19:19 +00002109 * Helper method for drivers which want to hardwire 80 wire cable
Alan Coxbe0d18d2007-03-06 02:37:56 -08002110 * detection.
2111 */
2112
2113int ata_cable_80wire(struct ata_port *ap)
2114{
2115 return ATA_CBL_PATA80;
2116}
2117
2118/**
2119 * ata_cable_unknown - return unknown PATA cable.
2120 * @ap: port
2121 *
2122 * Helper method for drivers which have no PATA cable detection.
2123 */
2124
2125int ata_cable_unknown(struct ata_port *ap)
2126{
2127 return ATA_CBL_PATA_UNK;
2128}
2129
2130/**
2131 * ata_cable_sata - return SATA cable type
2132 * @ap: port
2133 *
2134 * Helper method for drivers which have SATA cables
2135 */
2136
2137int ata_cable_sata(struct ata_port *ap)
2138{
2139 return ATA_CBL_SATA;
2140}
2141
2142/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07002143 * ata_bus_probe - Reset and probe ATA bus
2144 * @ap: Bus to probe
2145 *
Jeff Garzik0cba6322005-05-30 19:49:12 -04002146 * Master ATA bus probing function. Initiates a hardware-dependent
2147 * bus reset, then attempts to identify any devices found on
2148 * the bus.
2149 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07002150 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04002151 * PCI/etc. bus probe sem.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002152 *
2153 * RETURNS:
Tejun Heo96072e62006-04-01 01:38:17 +09002154 * Zero on success, negative errno otherwise.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002155 */
2156
Brian King80289162006-08-07 14:27:31 -05002157int ata_bus_probe(struct ata_port *ap)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002158{
Tejun Heo28ca5c52006-03-01 16:09:36 +09002159 unsigned int classes[ATA_MAX_DEVICES];
Tejun Heo14d2bac2006-04-02 17:54:46 +09002160 int tries[ATA_MAX_DEVICES];
Tejun Heof58229f2007-08-06 18:36:23 +09002161 int rc;
Tejun Heoe82cbdb2006-04-01 01:38:18 +09002162 struct ata_device *dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002163
Tejun Heo28ca5c52006-03-01 16:09:36 +09002164 ata_port_probe(ap);
2165
Tejun Heof58229f2007-08-06 18:36:23 +09002166 ata_link_for_each_dev(dev, &ap->link)
2167 tries[dev->devno] = ATA_PROBE_MAX_TRIES;
Tejun Heo14d2bac2006-04-02 17:54:46 +09002168
2169 retry:
Tejun Heo20444702006-03-13 01:57:01 +09002170 /* reset and determine device classes */
Tejun Heo52783c52006-05-31 18:28:22 +09002171 ap->ops->phy_reset(ap);
Tejun Heo2061a472006-03-12 00:57:39 +09002172
Tejun Heof58229f2007-08-06 18:36:23 +09002173 ata_link_for_each_dev(dev, &ap->link) {
Tejun Heo52783c52006-05-31 18:28:22 +09002174 if (!(ap->flags & ATA_FLAG_DISABLED) &&
2175 dev->class != ATA_DEV_UNKNOWN)
2176 classes[dev->devno] = dev->class;
2177 else
2178 classes[dev->devno] = ATA_DEV_NONE;
Tejun Heo20444702006-03-13 01:57:01 +09002179
Tejun Heo52783c52006-05-31 18:28:22 +09002180 dev->class = ATA_DEV_UNKNOWN;
Tejun Heo28ca5c52006-03-01 16:09:36 +09002181 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002182
Tejun Heo52783c52006-05-31 18:28:22 +09002183 ata_port_probe(ap);
Tejun Heo20444702006-03-13 01:57:01 +09002184
Alan Coxb6079ca2006-05-22 16:52:06 +01002185 /* after the reset the device state is PIO 0 and the controller
2186 state is undefined. Record the mode */
2187
Tejun Heof58229f2007-08-06 18:36:23 +09002188 ata_link_for_each_dev(dev, &ap->link)
2189 dev->pio_mode = XFER_PIO_0;
Alan Coxb6079ca2006-05-22 16:52:06 +01002190
Jeff Garzikf31f0cc2007-03-02 17:47:28 -05002191 /* read IDENTIFY page and configure devices. We have to do the identify
2192 specific sequence bass-ackwards so that PDIAG- is released by
2193 the slave device */
2194
Tejun Heof58229f2007-08-06 18:36:23 +09002195 ata_link_for_each_dev(dev, &ap->link) {
2196 if (tries[dev->devno])
2197 dev->class = classes[dev->devno];
Tejun Heo14d2bac2006-04-02 17:54:46 +09002198
Tejun Heoe1211e32006-04-01 01:38:18 +09002199 if (!ata_dev_enabled(dev))
Tejun Heoffeae412006-03-01 16:09:35 +09002200 continue;
2201
Tejun Heobff04642006-11-10 18:08:10 +09002202 rc = ata_dev_read_id(dev, &dev->class, ATA_READID_POSTRESET,
2203 dev->id);
Tejun Heo14d2bac2006-04-02 17:54:46 +09002204 if (rc)
2205 goto fail;
Jeff Garzikf31f0cc2007-03-02 17:47:28 -05002206 }
2207
Alan Coxbe0d18d2007-03-06 02:37:56 -08002208 /* Now ask for the cable type as PDIAG- should have been released */
2209 if (ap->ops->cable_detect)
2210 ap->cbl = ap->ops->cable_detect(ap);
2211
Alan Cox614fe292007-08-22 23:22:45 +01002212 /* We may have SATA bridge glue hiding here irrespective of the
2213 reported cable types and sensed types */
2214 ata_link_for_each_dev(dev, &ap->link) {
2215 if (!ata_dev_enabled(dev))
2216 continue;
2217 /* SATA drives indicate we have a bridge. We don't know which
2218 end of the link the bridge is which is a problem */
2219 if (ata_id_is_sata(dev->id))
2220 ap->cbl = ATA_CBL_SATA;
2221 }
2222
Jeff Garzikf31f0cc2007-03-02 17:47:28 -05002223 /* After the identify sequence we can now set up the devices. We do
2224 this in the normal order so that the user doesn't get confused */
2225
Tejun Heof58229f2007-08-06 18:36:23 +09002226 ata_link_for_each_dev(dev, &ap->link) {
Jeff Garzikf31f0cc2007-03-02 17:47:28 -05002227 if (!ata_dev_enabled(dev))
2228 continue;
Tejun Heoffeae412006-03-01 16:09:35 +09002229
Tejun Heo9af5c9c2007-08-06 18:36:22 +09002230 ap->link.eh_context.i.flags |= ATA_EHI_PRINTINFO;
Tejun Heoefdaedc2006-11-01 18:38:52 +09002231 rc = ata_dev_configure(dev);
Tejun Heo9af5c9c2007-08-06 18:36:22 +09002232 ap->link.eh_context.i.flags &= ~ATA_EHI_PRINTINFO;
Tejun Heo14d2bac2006-04-02 17:54:46 +09002233 if (rc)
2234 goto fail;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002235 }
2236
Tejun Heoe82cbdb2006-04-01 01:38:18 +09002237 /* configure transfer mode */
Tejun Heo02607312007-08-06 18:36:23 +09002238 rc = ata_set_mode(&ap->link, &dev);
Tejun Heo4ae72a12007-02-02 16:22:30 +09002239 if (rc)
Tejun Heo51713d32006-04-11 22:26:29 +09002240 goto fail;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002241
Tejun Heof58229f2007-08-06 18:36:23 +09002242 ata_link_for_each_dev(dev, &ap->link)
2243 if (ata_dev_enabled(dev))
Tejun Heoe82cbdb2006-04-01 01:38:18 +09002244 return 0;
Alan Coxe35a9e02006-03-27 18:46:37 +01002245
Tejun Heoe82cbdb2006-04-01 01:38:18 +09002246 /* no device present, disable port */
2247 ata_port_disable(ap);
Tejun Heo96072e62006-04-01 01:38:17 +09002248 return -ENODEV;
Tejun Heo14d2bac2006-04-02 17:54:46 +09002249
2250 fail:
Tejun Heo4ae72a12007-02-02 16:22:30 +09002251 tries[dev->devno]--;
2252
Tejun Heo14d2bac2006-04-02 17:54:46 +09002253 switch (rc) {
2254 case -EINVAL:
Tejun Heo4ae72a12007-02-02 16:22:30 +09002255 /* eeek, something went very wrong, give up */
Tejun Heo14d2bac2006-04-02 17:54:46 +09002256 tries[dev->devno] = 0;
2257 break;
Tejun Heo4ae72a12007-02-02 16:22:30 +09002258
2259 case -ENODEV:
2260 /* give it just one more chance */
2261 tries[dev->devno] = min(tries[dev->devno], 1);
Tejun Heo14d2bac2006-04-02 17:54:46 +09002262 case -EIO:
Tejun Heo4ae72a12007-02-02 16:22:30 +09002263 if (tries[dev->devno] == 1) {
2264 /* This is the last chance, better to slow
2265 * down than lose it.
2266 */
Tejun Heo936fd732007-08-06 18:36:23 +09002267 sata_down_spd_limit(&ap->link);
Tejun Heo4ae72a12007-02-02 16:22:30 +09002268 ata_down_xfermask_limit(dev, ATA_DNXFER_PIO);
2269 }
Tejun Heo14d2bac2006-04-02 17:54:46 +09002270 }
2271
Tejun Heo4ae72a12007-02-02 16:22:30 +09002272 if (!tries[dev->devno])
Tejun Heo3373efd2006-05-15 20:57:53 +09002273 ata_dev_disable(dev);
Tejun Heoec573752006-04-11 22:26:29 +09002274
Tejun Heo14d2bac2006-04-02 17:54:46 +09002275 goto retry;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002276}
2277
2278/**
Jeff Garzik0cba6322005-05-30 19:49:12 -04002279 * ata_port_probe - Mark port as enabled
2280 * @ap: Port for which we indicate enablement
Linus Torvalds1da177e2005-04-16 15:20:36 -07002281 *
Jeff Garzik0cba6322005-05-30 19:49:12 -04002282 * Modify @ap data structure such that the system
2283 * thinks that the entire port is enabled.
2284 *
Jeff Garzikcca39742006-08-24 03:19:22 -04002285 * LOCKING: host lock, or some other form of
Jeff Garzik0cba6322005-05-30 19:49:12 -04002286 * serialization.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002287 */
2288
2289void ata_port_probe(struct ata_port *ap)
2290{
Tejun Heo198e0fe2006-04-02 18:51:52 +09002291 ap->flags &= ~ATA_FLAG_DISABLED;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002292}
2293
2294/**
Tejun Heo3be680b2005-12-19 22:35:02 +09002295 * sata_print_link_status - Print SATA link status
Tejun Heo936fd732007-08-06 18:36:23 +09002296 * @link: SATA link to printk link status about
Tejun Heo3be680b2005-12-19 22:35:02 +09002297 *
2298 * This function prints link speed and status of a SATA link.
2299 *
2300 * LOCKING:
2301 * None.
2302 */
Tejun Heo936fd732007-08-06 18:36:23 +09002303void sata_print_link_status(struct ata_link *link)
Tejun Heo3be680b2005-12-19 22:35:02 +09002304{
Tejun Heo6d5f9732006-04-03 00:09:41 +09002305 u32 sstatus, scontrol, tmp;
Tejun Heo3be680b2005-12-19 22:35:02 +09002306
Tejun Heo936fd732007-08-06 18:36:23 +09002307 if (sata_scr_read(link, SCR_STATUS, &sstatus))
Tejun Heo3be680b2005-12-19 22:35:02 +09002308 return;
Tejun Heo936fd732007-08-06 18:36:23 +09002309 sata_scr_read(link, SCR_CONTROL, &scontrol);
Tejun Heo3be680b2005-12-19 22:35:02 +09002310
Tejun Heo936fd732007-08-06 18:36:23 +09002311 if (ata_link_online(link)) {
Tejun Heo3be680b2005-12-19 22:35:02 +09002312 tmp = (sstatus >> 4) & 0xf;
Tejun Heo936fd732007-08-06 18:36:23 +09002313 ata_link_printk(link, KERN_INFO,
Tejun Heof15a1da2006-05-15 20:57:56 +09002314 "SATA link up %s (SStatus %X SControl %X)\n",
2315 sata_spd_string(tmp), sstatus, scontrol);
Tejun Heo3be680b2005-12-19 22:35:02 +09002316 } else {
Tejun Heo936fd732007-08-06 18:36:23 +09002317 ata_link_printk(link, KERN_INFO,
Tejun Heof15a1da2006-05-15 20:57:56 +09002318 "SATA link down (SStatus %X SControl %X)\n",
2319 sstatus, scontrol);
Tejun Heo3be680b2005-12-19 22:35:02 +09002320 }
2321}
2322
2323/**
Jeff Garzik780a87f2005-05-30 15:41:05 -04002324 * __sata_phy_reset - Wake/reset a low-level SATA PHY
2325 * @ap: SATA port associated with target SATA PHY.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002326 *
Jeff Garzik780a87f2005-05-30 15:41:05 -04002327 * This function issues commands to standard SATA Sxxx
2328 * PHY registers, to wake up the phy (and device), and
2329 * clear any reset condition.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002330 *
2331 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04002332 * PCI/etc. bus probe sem.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002333 *
2334 */
2335void __sata_phy_reset(struct ata_port *ap)
2336{
Tejun Heo936fd732007-08-06 18:36:23 +09002337 struct ata_link *link = &ap->link;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002338 unsigned long timeout = jiffies + (HZ * 5);
Tejun Heo936fd732007-08-06 18:36:23 +09002339 u32 sstatus;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002340
2341 if (ap->flags & ATA_FLAG_SATA_RESET) {
Brett Russcdcca89e2005-03-28 15:10:27 -05002342 /* issue phy wake/reset */
Tejun Heo936fd732007-08-06 18:36:23 +09002343 sata_scr_write_flush(link, SCR_CONTROL, 0x301);
Tejun Heo62ba2842005-06-26 23:27:19 +09002344 /* Couldn't find anything in SATA I/II specs, but
2345 * AHCI-1.1 10.4.2 says at least 1 ms. */
2346 mdelay(1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002347 }
Tejun Heo81952c52006-05-15 20:57:47 +09002348 /* phy wake/clear reset */
Tejun Heo936fd732007-08-06 18:36:23 +09002349 sata_scr_write_flush(link, SCR_CONTROL, 0x300);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002350
2351 /* wait for phy to become ready, if necessary */
2352 do {
2353 msleep(200);
Tejun Heo936fd732007-08-06 18:36:23 +09002354 sata_scr_read(link, SCR_STATUS, &sstatus);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002355 if ((sstatus & 0xf) != 1)
2356 break;
2357 } while (time_before(jiffies, timeout));
2358
Tejun Heo3be680b2005-12-19 22:35:02 +09002359 /* print link status */
Tejun Heo936fd732007-08-06 18:36:23 +09002360 sata_print_link_status(link);
Jeff Garzik656563e2005-11-20 03:36:45 -05002361
Tejun Heo3be680b2005-12-19 22:35:02 +09002362 /* TODO: phy layer with polling, timeouts, etc. */
Tejun Heo936fd732007-08-06 18:36:23 +09002363 if (!ata_link_offline(link))
Linus Torvalds1da177e2005-04-16 15:20:36 -07002364 ata_port_probe(ap);
Tejun Heo3be680b2005-12-19 22:35:02 +09002365 else
Linus Torvalds1da177e2005-04-16 15:20:36 -07002366 ata_port_disable(ap);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002367
Tejun Heo198e0fe2006-04-02 18:51:52 +09002368 if (ap->flags & ATA_FLAG_DISABLED)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002369 return;
2370
2371 if (ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT)) {
2372 ata_port_disable(ap);
2373 return;
2374 }
2375
2376 ap->cbl = ATA_CBL_SATA;
2377}
2378
2379/**
Jeff Garzik780a87f2005-05-30 15:41:05 -04002380 * sata_phy_reset - Reset SATA bus.
2381 * @ap: SATA port associated with target SATA PHY.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002382 *
Jeff Garzik780a87f2005-05-30 15:41:05 -04002383 * This function resets the SATA bus, and then probes
2384 * the bus for devices.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002385 *
2386 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04002387 * PCI/etc. bus probe sem.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002388 *
2389 */
2390void sata_phy_reset(struct ata_port *ap)
2391{
2392 __sata_phy_reset(ap);
Tejun Heo198e0fe2006-04-02 18:51:52 +09002393 if (ap->flags & ATA_FLAG_DISABLED)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002394 return;
2395 ata_bus_reset(ap);
2396}
2397
2398/**
Alan Coxebdfca62006-03-23 15:38:34 +00002399 * ata_dev_pair - return other device on cable
Alan Coxebdfca62006-03-23 15:38:34 +00002400 * @adev: device
2401 *
2402 * Obtain the other device on the same cable, or if none is
2403 * present NULL is returned
2404 */
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05002405
Tejun Heo3373efd2006-05-15 20:57:53 +09002406struct ata_device *ata_dev_pair(struct ata_device *adev)
Alan Coxebdfca62006-03-23 15:38:34 +00002407{
Tejun Heo9af5c9c2007-08-06 18:36:22 +09002408 struct ata_link *link = adev->link;
2409 struct ata_device *pair = &link->device[1 - adev->devno];
Tejun Heoe1211e32006-04-01 01:38:18 +09002410 if (!ata_dev_enabled(pair))
Alan Coxebdfca62006-03-23 15:38:34 +00002411 return NULL;
2412 return pair;
2413}
2414
2415/**
Jeff Garzik780a87f2005-05-30 15:41:05 -04002416 * ata_port_disable - Disable port.
2417 * @ap: Port to be disabled.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002418 *
Jeff Garzik780a87f2005-05-30 15:41:05 -04002419 * Modify @ap data structure such that the system
2420 * thinks that the entire port is disabled, and should
2421 * never attempt to probe or communicate with devices
2422 * on this port.
2423 *
Jeff Garzikcca39742006-08-24 03:19:22 -04002424 * LOCKING: host lock, or some other form of
Jeff Garzik780a87f2005-05-30 15:41:05 -04002425 * serialization.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002426 */
2427
2428void ata_port_disable(struct ata_port *ap)
2429{
Tejun Heo9af5c9c2007-08-06 18:36:22 +09002430 ap->link.device[0].class = ATA_DEV_NONE;
2431 ap->link.device[1].class = ATA_DEV_NONE;
Tejun Heo198e0fe2006-04-02 18:51:52 +09002432 ap->flags |= ATA_FLAG_DISABLED;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002433}
2434
Tejun Heo1c3fae42006-04-02 20:53:28 +09002435/**
Tejun Heo3c567b72006-05-15 20:57:23 +09002436 * sata_down_spd_limit - adjust SATA spd limit downward
Tejun Heo936fd732007-08-06 18:36:23 +09002437 * @link: Link to adjust SATA spd limit for
Tejun Heo1c3fae42006-04-02 20:53:28 +09002438 *
Tejun Heo936fd732007-08-06 18:36:23 +09002439 * Adjust SATA spd limit of @link downward. Note that this
Tejun Heo1c3fae42006-04-02 20:53:28 +09002440 * function only adjusts the limit. The change must be applied
Tejun Heo3c567b72006-05-15 20:57:23 +09002441 * using sata_set_spd().
Tejun Heo1c3fae42006-04-02 20:53:28 +09002442 *
2443 * LOCKING:
2444 * Inherited from caller.
2445 *
2446 * RETURNS:
2447 * 0 on success, negative errno on failure
2448 */
Tejun Heo936fd732007-08-06 18:36:23 +09002449int sata_down_spd_limit(struct ata_link *link)
Tejun Heo1c3fae42006-04-02 20:53:28 +09002450{
Tejun Heo81952c52006-05-15 20:57:47 +09002451 u32 sstatus, spd, mask;
2452 int rc, highbit;
Tejun Heo1c3fae42006-04-02 20:53:28 +09002453
Tejun Heo936fd732007-08-06 18:36:23 +09002454 if (!sata_scr_valid(link))
Tejun Heo008a7892007-07-16 14:29:40 +09002455 return -EOPNOTSUPP;
2456
2457 /* If SCR can be read, use it to determine the current SPD.
Tejun Heo936fd732007-08-06 18:36:23 +09002458 * If not, use cached value in link->sata_spd.
Tejun Heo008a7892007-07-16 14:29:40 +09002459 */
Tejun Heo936fd732007-08-06 18:36:23 +09002460 rc = sata_scr_read(link, SCR_STATUS, &sstatus);
Tejun Heo008a7892007-07-16 14:29:40 +09002461 if (rc == 0)
2462 spd = (sstatus >> 4) & 0xf;
2463 else
Tejun Heo936fd732007-08-06 18:36:23 +09002464 spd = link->sata_spd;
Tejun Heo1c3fae42006-04-02 20:53:28 +09002465
Tejun Heo936fd732007-08-06 18:36:23 +09002466 mask = link->sata_spd_limit;
Tejun Heo1c3fae42006-04-02 20:53:28 +09002467 if (mask <= 1)
2468 return -EINVAL;
Tejun Heo008a7892007-07-16 14:29:40 +09002469
2470 /* unconditionally mask off the highest bit */
Tejun Heo1c3fae42006-04-02 20:53:28 +09002471 highbit = fls(mask) - 1;
2472 mask &= ~(1 << highbit);
2473
Tejun Heo008a7892007-07-16 14:29:40 +09002474 /* Mask off all speeds higher than or equal to the current
2475 * one. Force 1.5Gbps if current SPD is not available.
2476 */
2477 if (spd > 1)
2478 mask &= (1 << (spd - 1)) - 1;
2479 else
2480 mask &= 1;
2481
2482 /* were we already at the bottom? */
Tejun Heo1c3fae42006-04-02 20:53:28 +09002483 if (!mask)
2484 return -EINVAL;
2485
Tejun Heo936fd732007-08-06 18:36:23 +09002486 link->sata_spd_limit = mask;
Tejun Heo1c3fae42006-04-02 20:53:28 +09002487
Tejun Heo936fd732007-08-06 18:36:23 +09002488 ata_link_printk(link, KERN_WARNING, "limiting SATA link speed to %s\n",
Tejun Heof15a1da2006-05-15 20:57:56 +09002489 sata_spd_string(fls(mask)));
Tejun Heo1c3fae42006-04-02 20:53:28 +09002490
2491 return 0;
2492}
2493
Tejun Heo936fd732007-08-06 18:36:23 +09002494static int __sata_set_spd_needed(struct ata_link *link, u32 *scontrol)
Tejun Heo1c3fae42006-04-02 20:53:28 +09002495{
2496 u32 spd, limit;
2497
Tejun Heo936fd732007-08-06 18:36:23 +09002498 if (link->sata_spd_limit == UINT_MAX)
Tejun Heo1c3fae42006-04-02 20:53:28 +09002499 limit = 0;
2500 else
Tejun Heo936fd732007-08-06 18:36:23 +09002501 limit = fls(link->sata_spd_limit);
Tejun Heo1c3fae42006-04-02 20:53:28 +09002502
2503 spd = (*scontrol >> 4) & 0xf;
2504 *scontrol = (*scontrol & ~0xf0) | ((limit & 0xf) << 4);
2505
2506 return spd != limit;
2507}
2508
2509/**
Tejun Heo3c567b72006-05-15 20:57:23 +09002510 * sata_set_spd_needed - is SATA spd configuration needed
Tejun Heo936fd732007-08-06 18:36:23 +09002511 * @link: Link in question
Tejun Heo1c3fae42006-04-02 20:53:28 +09002512 *
2513 * Test whether the spd limit in SControl matches
Tejun Heo936fd732007-08-06 18:36:23 +09002514 * @link->sata_spd_limit. This function is used to determine
Tejun Heo1c3fae42006-04-02 20:53:28 +09002515 * whether hardreset is necessary to apply SATA spd
2516 * configuration.
2517 *
2518 * LOCKING:
2519 * Inherited from caller.
2520 *
2521 * RETURNS:
2522 * 1 if SATA spd configuration is needed, 0 otherwise.
2523 */
Tejun Heo936fd732007-08-06 18:36:23 +09002524int sata_set_spd_needed(struct ata_link *link)
Tejun Heo1c3fae42006-04-02 20:53:28 +09002525{
2526 u32 scontrol;
2527
Tejun Heo936fd732007-08-06 18:36:23 +09002528 if (sata_scr_read(link, SCR_CONTROL, &scontrol))
Tejun Heo1c3fae42006-04-02 20:53:28 +09002529 return 0;
2530
Tejun Heo936fd732007-08-06 18:36:23 +09002531 return __sata_set_spd_needed(link, &scontrol);
Tejun Heo1c3fae42006-04-02 20:53:28 +09002532}
2533
2534/**
Tejun Heo3c567b72006-05-15 20:57:23 +09002535 * sata_set_spd - set SATA spd according to spd limit
Tejun Heo936fd732007-08-06 18:36:23 +09002536 * @link: Link to set SATA spd for
Tejun Heo1c3fae42006-04-02 20:53:28 +09002537 *
Tejun Heo936fd732007-08-06 18:36:23 +09002538 * Set SATA spd of @link according to sata_spd_limit.
Tejun Heo1c3fae42006-04-02 20:53:28 +09002539 *
2540 * LOCKING:
2541 * Inherited from caller.
2542 *
2543 * RETURNS:
2544 * 0 if spd doesn't need to be changed, 1 if spd has been
Tejun Heo81952c52006-05-15 20:57:47 +09002545 * changed. Negative errno if SCR registers are inaccessible.
Tejun Heo1c3fae42006-04-02 20:53:28 +09002546 */
Tejun Heo936fd732007-08-06 18:36:23 +09002547int sata_set_spd(struct ata_link *link)
Tejun Heo1c3fae42006-04-02 20:53:28 +09002548{
2549 u32 scontrol;
Tejun Heo81952c52006-05-15 20:57:47 +09002550 int rc;
Tejun Heo1c3fae42006-04-02 20:53:28 +09002551
Tejun Heo936fd732007-08-06 18:36:23 +09002552 if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
Tejun Heo81952c52006-05-15 20:57:47 +09002553 return rc;
Tejun Heo1c3fae42006-04-02 20:53:28 +09002554
Tejun Heo936fd732007-08-06 18:36:23 +09002555 if (!__sata_set_spd_needed(link, &scontrol))
Tejun Heo1c3fae42006-04-02 20:53:28 +09002556 return 0;
2557
Tejun Heo936fd732007-08-06 18:36:23 +09002558 if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol)))
Tejun Heo81952c52006-05-15 20:57:47 +09002559 return rc;
2560
Tejun Heo1c3fae42006-04-02 20:53:28 +09002561 return 1;
2562}
2563
Alan Cox452503f2005-10-21 19:01:32 -04002564/*
2565 * This mode timing computation functionality is ported over from
2566 * drivers/ide/ide-timing.h and was originally written by Vojtech Pavlik
2567 */
2568/*
Alan Coxb352e572006-08-10 18:52:12 +01002569 * PIO 0-4, MWDMA 0-2 and UDMA 0-6 timings (in nanoseconds).
Alan Cox452503f2005-10-21 19:01:32 -04002570 * These were taken from ATA/ATAPI-6 standard, rev 0a, except
Alan Coxb352e572006-08-10 18:52:12 +01002571 * for UDMA6, which is currently supported only by Maxtor drives.
2572 *
2573 * For PIO 5/6 MWDMA 3/4 see the CFA specification 3.0.
Alan Cox452503f2005-10-21 19:01:32 -04002574 */
2575
2576static const struct ata_timing ata_timing[] = {
2577
2578 { XFER_UDMA_6, 0, 0, 0, 0, 0, 0, 0, 15 },
2579 { XFER_UDMA_5, 0, 0, 0, 0, 0, 0, 0, 20 },
2580 { XFER_UDMA_4, 0, 0, 0, 0, 0, 0, 0, 30 },
2581 { XFER_UDMA_3, 0, 0, 0, 0, 0, 0, 0, 45 },
2582
Alan Coxb352e572006-08-10 18:52:12 +01002583 { XFER_MW_DMA_4, 25, 0, 0, 0, 55, 20, 80, 0 },
2584 { XFER_MW_DMA_3, 25, 0, 0, 0, 65, 25, 100, 0 },
Alan Cox452503f2005-10-21 19:01:32 -04002585 { XFER_UDMA_2, 0, 0, 0, 0, 0, 0, 0, 60 },
2586 { XFER_UDMA_1, 0, 0, 0, 0, 0, 0, 0, 80 },
2587 { XFER_UDMA_0, 0, 0, 0, 0, 0, 0, 0, 120 },
2588
2589/* { XFER_UDMA_SLOW, 0, 0, 0, 0, 0, 0, 0, 150 }, */
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05002590
Alan Cox452503f2005-10-21 19:01:32 -04002591 { XFER_MW_DMA_2, 25, 0, 0, 0, 70, 25, 120, 0 },
2592 { XFER_MW_DMA_1, 45, 0, 0, 0, 80, 50, 150, 0 },
2593 { XFER_MW_DMA_0, 60, 0, 0, 0, 215, 215, 480, 0 },
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05002594
Alan Cox452503f2005-10-21 19:01:32 -04002595 { XFER_SW_DMA_2, 60, 0, 0, 0, 120, 120, 240, 0 },
2596 { XFER_SW_DMA_1, 90, 0, 0, 0, 240, 240, 480, 0 },
2597 { XFER_SW_DMA_0, 120, 0, 0, 0, 480, 480, 960, 0 },
2598
Alan Coxb352e572006-08-10 18:52:12 +01002599 { XFER_PIO_6, 10, 55, 20, 80, 55, 20, 80, 0 },
2600 { XFER_PIO_5, 15, 65, 25, 100, 65, 25, 100, 0 },
Alan Cox452503f2005-10-21 19:01:32 -04002601 { XFER_PIO_4, 25, 70, 25, 120, 70, 25, 120, 0 },
2602 { XFER_PIO_3, 30, 80, 70, 180, 80, 70, 180, 0 },
2603
2604 { XFER_PIO_2, 30, 290, 40, 330, 100, 90, 240, 0 },
2605 { XFER_PIO_1, 50, 290, 93, 383, 125, 100, 383, 0 },
2606 { XFER_PIO_0, 70, 290, 240, 600, 165, 150, 600, 0 },
2607
2608/* { XFER_PIO_SLOW, 120, 290, 240, 960, 290, 240, 960, 0 }, */
2609
2610 { 0xFF }
2611};
2612
2613#define ENOUGH(v,unit) (((v)-1)/(unit)+1)
2614#define EZ(v,unit) ((v)?ENOUGH(v,unit):0)
2615
2616static void ata_timing_quantize(const struct ata_timing *t, struct ata_timing *q, int T, int UT)
2617{
2618 q->setup = EZ(t->setup * 1000, T);
2619 q->act8b = EZ(t->act8b * 1000, T);
2620 q->rec8b = EZ(t->rec8b * 1000, T);
2621 q->cyc8b = EZ(t->cyc8b * 1000, T);
2622 q->active = EZ(t->active * 1000, T);
2623 q->recover = EZ(t->recover * 1000, T);
2624 q->cycle = EZ(t->cycle * 1000, T);
2625 q->udma = EZ(t->udma * 1000, UT);
2626}
2627
2628void ata_timing_merge(const struct ata_timing *a, const struct ata_timing *b,
2629 struct ata_timing *m, unsigned int what)
2630{
2631 if (what & ATA_TIMING_SETUP ) m->setup = max(a->setup, b->setup);
2632 if (what & ATA_TIMING_ACT8B ) m->act8b = max(a->act8b, b->act8b);
2633 if (what & ATA_TIMING_REC8B ) m->rec8b = max(a->rec8b, b->rec8b);
2634 if (what & ATA_TIMING_CYC8B ) m->cyc8b = max(a->cyc8b, b->cyc8b);
2635 if (what & ATA_TIMING_ACTIVE ) m->active = max(a->active, b->active);
2636 if (what & ATA_TIMING_RECOVER) m->recover = max(a->recover, b->recover);
2637 if (what & ATA_TIMING_CYCLE ) m->cycle = max(a->cycle, b->cycle);
2638 if (what & ATA_TIMING_UDMA ) m->udma = max(a->udma, b->udma);
2639}
2640
2641static const struct ata_timing* ata_timing_find_mode(unsigned short speed)
2642{
2643 const struct ata_timing *t;
2644
2645 for (t = ata_timing; t->mode != speed; t++)
Alan Cox91190752005-10-26 12:17:46 -04002646 if (t->mode == 0xFF)
Alan Cox452503f2005-10-21 19:01:32 -04002647 return NULL;
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05002648 return t;
Alan Cox452503f2005-10-21 19:01:32 -04002649}
2650
2651int ata_timing_compute(struct ata_device *adev, unsigned short speed,
2652 struct ata_timing *t, int T, int UT)
2653{
2654 const struct ata_timing *s;
2655 struct ata_timing p;
2656
2657 /*
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05002658 * Find the mode.
Albert Lee75b1f2f2005-11-16 17:06:18 +08002659 */
Alan Cox452503f2005-10-21 19:01:32 -04002660
2661 if (!(s = ata_timing_find_mode(speed)))
2662 return -EINVAL;
2663
Albert Lee75b1f2f2005-11-16 17:06:18 +08002664 memcpy(t, s, sizeof(*s));
2665
Alan Cox452503f2005-10-21 19:01:32 -04002666 /*
2667 * If the drive is an EIDE drive, it can tell us it needs extended
2668 * PIO/MW_DMA cycle timing.
2669 */
2670
2671 if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE drive */
2672 memset(&p, 0, sizeof(p));
2673 if(speed >= XFER_PIO_0 && speed <= XFER_SW_DMA_0) {
2674 if (speed <= XFER_PIO_2) p.cycle = p.cyc8b = adev->id[ATA_ID_EIDE_PIO];
2675 else p.cycle = p.cyc8b = adev->id[ATA_ID_EIDE_PIO_IORDY];
2676 } else if(speed >= XFER_MW_DMA_0 && speed <= XFER_MW_DMA_2) {
2677 p.cycle = adev->id[ATA_ID_EIDE_DMA_MIN];
2678 }
2679 ata_timing_merge(&p, t, t, ATA_TIMING_CYCLE | ATA_TIMING_CYC8B);
2680 }
2681
2682 /*
2683 * Convert the timing to bus clock counts.
2684 */
2685
Albert Lee75b1f2f2005-11-16 17:06:18 +08002686 ata_timing_quantize(t, t, T, UT);
Alan Cox452503f2005-10-21 19:01:32 -04002687
2688 /*
Randy Dunlapc893a3a2006-01-28 13:15:32 -05002689 * Even in DMA/UDMA modes we still use PIO access for IDENTIFY,
2690 * S.M.A.R.T * and some other commands. We have to ensure that the
2691 * DMA cycle timing is slower/equal than the fastest PIO timing.
Alan Cox452503f2005-10-21 19:01:32 -04002692 */
2693
Alanfd3367af2006-12-07 12:41:18 +00002694 if (speed > XFER_PIO_6) {
Alan Cox452503f2005-10-21 19:01:32 -04002695 ata_timing_compute(adev, adev->pio_mode, &p, T, UT);
2696 ata_timing_merge(&p, t, t, ATA_TIMING_ALL);
2697 }
2698
2699 /*
Randy Dunlapc893a3a2006-01-28 13:15:32 -05002700 * Lengthen active & recovery time so that cycle time is correct.
Alan Cox452503f2005-10-21 19:01:32 -04002701 */
2702
2703 if (t->act8b + t->rec8b < t->cyc8b) {
2704 t->act8b += (t->cyc8b - (t->act8b + t->rec8b)) / 2;
2705 t->rec8b = t->cyc8b - t->act8b;
2706 }
2707
2708 if (t->active + t->recover < t->cycle) {
2709 t->active += (t->cycle - (t->active + t->recover)) / 2;
2710 t->recover = t->cycle - t->active;
2711 }
Jeff Garzika617c092007-05-21 20:14:23 -04002712
Alan Cox4f701d12007-04-23 11:55:36 +01002713 /* In a few cases quantisation may produce enough errors to
2714 leave t->cycle too low for the sum of active and recovery
2715 if so we must correct this */
2716 if (t->active + t->recover > t->cycle)
2717 t->cycle = t->active + t->recover;
Alan Cox452503f2005-10-21 19:01:32 -04002718
2719 return 0;
2720}
2721
Tejun Heocf176e12006-04-02 17:54:46 +09002722/**
2723 * ata_down_xfermask_limit - adjust dev xfer masks downward
Tejun Heocf176e12006-04-02 17:54:46 +09002724 * @dev: Device to adjust xfer masks
Tejun Heo458337d2007-02-02 16:22:30 +09002725 * @sel: ATA_DNXFER_* selector
Tejun Heocf176e12006-04-02 17:54:46 +09002726 *
2727 * Adjust xfer masks of @dev downward. Note that this function
2728 * does not apply the change. Invoking ata_set_mode() afterwards
2729 * will apply the limit.
2730 *
2731 * LOCKING:
2732 * Inherited from caller.
2733 *
2734 * RETURNS:
2735 * 0 on success, negative errno on failure
2736 */
Tejun Heo458337d2007-02-02 16:22:30 +09002737int ata_down_xfermask_limit(struct ata_device *dev, unsigned int sel)
Tejun Heocf176e12006-04-02 17:54:46 +09002738{
Tejun Heo458337d2007-02-02 16:22:30 +09002739 char buf[32];
2740 unsigned int orig_mask, xfer_mask;
2741 unsigned int pio_mask, mwdma_mask, udma_mask;
2742 int quiet, highbit;
Tejun Heocf176e12006-04-02 17:54:46 +09002743
Tejun Heo458337d2007-02-02 16:22:30 +09002744 quiet = !!(sel & ATA_DNXFER_QUIET);
2745 sel &= ~ATA_DNXFER_QUIET;
Tejun Heocf176e12006-04-02 17:54:46 +09002746
Tejun Heo458337d2007-02-02 16:22:30 +09002747 xfer_mask = orig_mask = ata_pack_xfermask(dev->pio_mask,
2748 dev->mwdma_mask,
2749 dev->udma_mask);
2750 ata_unpack_xfermask(xfer_mask, &pio_mask, &mwdma_mask, &udma_mask);
Tejun Heocf176e12006-04-02 17:54:46 +09002751
Tejun Heo458337d2007-02-02 16:22:30 +09002752 switch (sel) {
2753 case ATA_DNXFER_PIO:
2754 highbit = fls(pio_mask) - 1;
2755 pio_mask &= ~(1 << highbit);
2756 break;
2757
2758 case ATA_DNXFER_DMA:
2759 if (udma_mask) {
2760 highbit = fls(udma_mask) - 1;
2761 udma_mask &= ~(1 << highbit);
2762 if (!udma_mask)
2763 return -ENOENT;
2764 } else if (mwdma_mask) {
2765 highbit = fls(mwdma_mask) - 1;
2766 mwdma_mask &= ~(1 << highbit);
2767 if (!mwdma_mask)
2768 return -ENOENT;
2769 }
2770 break;
2771
2772 case ATA_DNXFER_40C:
2773 udma_mask &= ATA_UDMA_MASK_40C;
2774 break;
2775
2776 case ATA_DNXFER_FORCE_PIO0:
2777 pio_mask &= 1;
2778 case ATA_DNXFER_FORCE_PIO:
2779 mwdma_mask = 0;
2780 udma_mask = 0;
2781 break;
2782
Tejun Heo458337d2007-02-02 16:22:30 +09002783 default:
2784 BUG();
2785 }
2786
2787 xfer_mask &= ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask);
2788
2789 if (!(xfer_mask & ATA_MASK_PIO) || xfer_mask == orig_mask)
2790 return -ENOENT;
2791
2792 if (!quiet) {
2793 if (xfer_mask & (ATA_MASK_MWDMA | ATA_MASK_UDMA))
2794 snprintf(buf, sizeof(buf), "%s:%s",
2795 ata_mode_string(xfer_mask),
2796 ata_mode_string(xfer_mask & ATA_MASK_PIO));
2797 else
2798 snprintf(buf, sizeof(buf), "%s",
2799 ata_mode_string(xfer_mask));
2800
2801 ata_dev_printk(dev, KERN_WARNING,
2802 "limiting speed to %s\n", buf);
2803 }
Tejun Heocf176e12006-04-02 17:54:46 +09002804
2805 ata_unpack_xfermask(xfer_mask, &dev->pio_mask, &dev->mwdma_mask,
2806 &dev->udma_mask);
2807
Tejun Heocf176e12006-04-02 17:54:46 +09002808 return 0;
Tejun Heocf176e12006-04-02 17:54:46 +09002809}
2810
Tejun Heo3373efd2006-05-15 20:57:53 +09002811static int ata_dev_set_mode(struct ata_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002812{
Tejun Heo9af5c9c2007-08-06 18:36:22 +09002813 struct ata_eh_context *ehc = &dev->link->eh_context;
Tejun Heo83206a22006-03-24 15:25:31 +09002814 unsigned int err_mask;
2815 int rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002816
Tejun Heoe8384602006-04-02 18:51:53 +09002817 dev->flags &= ~ATA_DFLAG_PIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002818 if (dev->xfer_shift == ATA_SHIFT_PIO)
2819 dev->flags |= ATA_DFLAG_PIO;
2820
Tejun Heo3373efd2006-05-15 20:57:53 +09002821 err_mask = ata_dev_set_xfermode(dev);
Alan11750a42007-02-05 16:28:30 +00002822 /* Old CFA may refuse this command, which is just fine */
2823 if (dev->xfer_shift == ATA_SHIFT_PIO && ata_id_is_cfa(dev->id))
2824 err_mask &= ~AC_ERR_DEV;
Alan Cox0bc2a792007-07-31 14:01:48 +01002825 /* Some very old devices and some bad newer ones fail any kind of
2826 SET_XFERMODE request but support PIO0-2 timings and no IORDY */
2827 if (dev->xfer_shift == ATA_SHIFT_PIO && !ata_id_has_iordy(dev->id) &&
2828 dev->pio_mode <= XFER_PIO_2)
2829 err_mask &= ~AC_ERR_DEV;
Tejun Heo83206a22006-03-24 15:25:31 +09002830 if (err_mask) {
Tejun Heof15a1da2006-05-15 20:57:56 +09002831 ata_dev_printk(dev, KERN_ERR, "failed to set xfermode "
2832 "(err_mask=0x%x)\n", err_mask);
Tejun Heo83206a22006-03-24 15:25:31 +09002833 return -EIO;
2834 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002835
Tejun Heobaa1e782006-11-01 18:39:27 +09002836 ehc->i.flags |= ATA_EHI_POST_SETMODE;
Tejun Heo3373efd2006-05-15 20:57:53 +09002837 rc = ata_dev_revalidate(dev, 0);
Tejun Heobaa1e782006-11-01 18:39:27 +09002838 ehc->i.flags &= ~ATA_EHI_POST_SETMODE;
Tejun Heo5eb45c02006-04-02 18:51:52 +09002839 if (rc)
Tejun Heo83206a22006-03-24 15:25:31 +09002840 return rc;
Tejun Heo48a8a142006-03-05 17:55:58 +09002841
Tejun Heo23e71c32006-03-06 04:31:57 +09002842 DPRINTK("xfer_shift=%u, xfer_mode=0x%x\n",
2843 dev->xfer_shift, (int)dev->xfer_mode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002844
Tejun Heof15a1da2006-05-15 20:57:56 +09002845 ata_dev_printk(dev, KERN_INFO, "configured for %s\n",
2846 ata_mode_string(ata_xfer_mode2mask(dev->xfer_mode)));
Tejun Heo83206a22006-03-24 15:25:31 +09002847 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002848}
2849
Linus Torvalds1da177e2005-04-16 15:20:36 -07002850/**
Alan04351822007-03-06 02:37:52 -08002851 * ata_do_set_mode - Program timings and issue SET FEATURES - XFER
Tejun Heo02607312007-08-06 18:36:23 +09002852 * @link: link on which timings will be programmed
Tejun Heoe82cbdb2006-04-01 01:38:18 +09002853 * @r_failed_dev: out paramter for failed device
Linus Torvalds1da177e2005-04-16 15:20:36 -07002854 *
Alan04351822007-03-06 02:37:52 -08002855 * Standard implementation of the function used to tune and set
2856 * ATA device disk transfer mode (PIO3, UDMA6, etc.). If
2857 * ata_dev_set_mode() fails, pointer to the failing device is
Tejun Heoe82cbdb2006-04-01 01:38:18 +09002858 * returned in @r_failed_dev.
Jeff Garzik780a87f2005-05-30 15:41:05 -04002859 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07002860 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04002861 * PCI/etc. bus probe sem.
Tejun Heoe82cbdb2006-04-01 01:38:18 +09002862 *
2863 * RETURNS:
2864 * 0 on success, negative errno otherwise
Linus Torvalds1da177e2005-04-16 15:20:36 -07002865 */
Alan04351822007-03-06 02:37:52 -08002866
Tejun Heo02607312007-08-06 18:36:23 +09002867int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002868{
Tejun Heo02607312007-08-06 18:36:23 +09002869 struct ata_port *ap = link->ap;
Tejun Heoe8e06192006-04-01 01:38:18 +09002870 struct ata_device *dev;
Tejun Heof58229f2007-08-06 18:36:23 +09002871 int rc = 0, used_dma = 0, found = 0;
Tejun Heo3adcebb2006-05-15 20:57:37 +09002872
Tejun Heoa6d5a512006-03-06 04:31:57 +09002873 /* step 1: calculate xfer_mask */
Tejun Heof58229f2007-08-06 18:36:23 +09002874 ata_link_for_each_dev(dev, link) {
Tejun Heoacf356b2006-03-24 14:07:50 +09002875 unsigned int pio_mask, dma_mask;
Tejun Heoa6d5a512006-03-06 04:31:57 +09002876
Tejun Heoe1211e32006-04-01 01:38:18 +09002877 if (!ata_dev_enabled(dev))
Tejun Heoa6d5a512006-03-06 04:31:57 +09002878 continue;
2879
Tejun Heo3373efd2006-05-15 20:57:53 +09002880 ata_dev_xfermask(dev);
Tejun Heoa6d5a512006-03-06 04:31:57 +09002881
Tejun Heoacf356b2006-03-24 14:07:50 +09002882 pio_mask = ata_pack_xfermask(dev->pio_mask, 0, 0);
2883 dma_mask = ata_pack_xfermask(0, dev->mwdma_mask, dev->udma_mask);
2884 dev->pio_mode = ata_xfer_mask2mode(pio_mask);
2885 dev->dma_mode = ata_xfer_mask2mode(dma_mask);
Alan Cox5444a6f2006-03-27 18:58:20 +01002886
Tejun Heo4f659772006-04-01 01:38:18 +09002887 found = 1;
Alan Cox5444a6f2006-03-27 18:58:20 +01002888 if (dev->dma_mode)
2889 used_dma = 1;
Tejun Heoa6d5a512006-03-06 04:31:57 +09002890 }
Tejun Heo4f659772006-04-01 01:38:18 +09002891 if (!found)
Tejun Heoe82cbdb2006-04-01 01:38:18 +09002892 goto out;
Tejun Heoa6d5a512006-03-06 04:31:57 +09002893
2894 /* step 2: always set host PIO timings */
Tejun Heof58229f2007-08-06 18:36:23 +09002895 ata_link_for_each_dev(dev, link) {
Tejun Heoe8e06192006-04-01 01:38:18 +09002896 if (!ata_dev_enabled(dev))
2897 continue;
2898
2899 if (!dev->pio_mode) {
Tejun Heof15a1da2006-05-15 20:57:56 +09002900 ata_dev_printk(dev, KERN_WARNING, "no PIO support\n");
Tejun Heoe8e06192006-04-01 01:38:18 +09002901 rc = -EINVAL;
Tejun Heoe82cbdb2006-04-01 01:38:18 +09002902 goto out;
Tejun Heoe8e06192006-04-01 01:38:18 +09002903 }
2904
2905 dev->xfer_mode = dev->pio_mode;
2906 dev->xfer_shift = ATA_SHIFT_PIO;
2907 if (ap->ops->set_piomode)
2908 ap->ops->set_piomode(ap, dev);
2909 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002910
Tejun Heoa6d5a512006-03-06 04:31:57 +09002911 /* step 3: set host DMA timings */
Tejun Heof58229f2007-08-06 18:36:23 +09002912 ata_link_for_each_dev(dev, link) {
Tejun Heoe8e06192006-04-01 01:38:18 +09002913 if (!ata_dev_enabled(dev) || !dev->dma_mode)
2914 continue;
2915
2916 dev->xfer_mode = dev->dma_mode;
2917 dev->xfer_shift = ata_xfer_mode2shift(dev->dma_mode);
2918 if (ap->ops->set_dmamode)
2919 ap->ops->set_dmamode(ap, dev);
2920 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002921
2922 /* step 4: update devices' xfer mode */
Tejun Heof58229f2007-08-06 18:36:23 +09002923 ata_link_for_each_dev(dev, link) {
Alan18d90de2007-01-24 11:42:38 +00002924 /* don't update suspended devices' xfer mode */
Tejun Heo9666f402007-05-04 21:27:47 +02002925 if (!ata_dev_enabled(dev))
Tejun Heo83206a22006-03-24 15:25:31 +09002926 continue;
2927
Tejun Heo3373efd2006-05-15 20:57:53 +09002928 rc = ata_dev_set_mode(dev);
Tejun Heo5bbc53f2006-04-01 01:38:17 +09002929 if (rc)
Tejun Heoe82cbdb2006-04-01 01:38:18 +09002930 goto out;
Tejun Heo83206a22006-03-24 15:25:31 +09002931 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002932
Tejun Heoe8e06192006-04-01 01:38:18 +09002933 /* Record simplex status. If we selected DMA then the other
2934 * host channels are not permitted to do so.
Alan Cox5444a6f2006-03-27 18:58:20 +01002935 */
Jeff Garzikcca39742006-08-24 03:19:22 -04002936 if (used_dma && (ap->host->flags & ATA_HOST_SIMPLEX))
Alan032af1c2007-03-01 17:36:46 +00002937 ap->host->simplex_claimed = ap;
Alan Cox5444a6f2006-03-27 18:58:20 +01002938
Tejun Heoe82cbdb2006-04-01 01:38:18 +09002939 out:
2940 if (rc)
2941 *r_failed_dev = dev;
2942 return rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002943}
2944
2945/**
Alan04351822007-03-06 02:37:52 -08002946 * ata_set_mode - Program timings and issue SET FEATURES - XFER
Tejun Heo02607312007-08-06 18:36:23 +09002947 * @link: link on which timings will be programmed
Alan04351822007-03-06 02:37:52 -08002948 * @r_failed_dev: out paramter for failed device
2949 *
2950 * Set ATA device disk transfer mode (PIO3, UDMA6, etc.). If
2951 * ata_set_mode() fails, pointer to the failing device is
2952 * returned in @r_failed_dev.
2953 *
2954 * LOCKING:
2955 * PCI/etc. bus probe sem.
2956 *
2957 * RETURNS:
2958 * 0 on success, negative errno otherwise
2959 */
Tejun Heo02607312007-08-06 18:36:23 +09002960int ata_set_mode(struct ata_link *link, struct ata_device **r_failed_dev)
Alan04351822007-03-06 02:37:52 -08002961{
Tejun Heo02607312007-08-06 18:36:23 +09002962 struct ata_port *ap = link->ap;
2963
Alan04351822007-03-06 02:37:52 -08002964 /* has private set_mode? */
2965 if (ap->ops->set_mode)
Tejun Heo02607312007-08-06 18:36:23 +09002966 return ap->ops->set_mode(link, r_failed_dev);
2967 return ata_do_set_mode(link, r_failed_dev);
Alan04351822007-03-06 02:37:52 -08002968}
2969
2970/**
Jeff Garzik1fdffbc2006-02-09 05:15:27 -05002971 * ata_tf_to_host - issue ATA taskfile to host controller
2972 * @ap: port to which command is being issued
2973 * @tf: ATA taskfile register set
2974 *
2975 * Issues ATA taskfile register set to ATA host controller,
2976 * with proper synchronization with interrupt handler and
2977 * other threads.
2978 *
2979 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04002980 * spin_lock_irqsave(host lock)
Jeff Garzik1fdffbc2006-02-09 05:15:27 -05002981 */
2982
2983static inline void ata_tf_to_host(struct ata_port *ap,
2984 const struct ata_taskfile *tf)
2985{
2986 ap->ops->tf_load(ap, tf);
2987 ap->ops->exec_command(ap, tf);
2988}
2989
2990/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07002991 * ata_busy_sleep - sleep until BSY clears, or timeout
2992 * @ap: port containing status register to be polled
2993 * @tmout_pat: impatience timeout
2994 * @tmout: overall timeout
2995 *
Jeff Garzik780a87f2005-05-30 15:41:05 -04002996 * Sleep until ATA Status register bit BSY clears,
2997 * or a timeout occurs.
2998 *
Tejun Heod1adc1b2006-10-09 18:32:15 +09002999 * LOCKING:
3000 * Kernel thread context (may sleep).
3001 *
3002 * RETURNS:
3003 * 0 on success, -errno otherwise.
Linus Torvalds1da177e2005-04-16 15:20:36 -07003004 */
Tejun Heod1adc1b2006-10-09 18:32:15 +09003005int ata_busy_sleep(struct ata_port *ap,
3006 unsigned long tmout_pat, unsigned long tmout)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003007{
3008 unsigned long timer_start, timeout;
3009 u8 status;
3010
3011 status = ata_busy_wait(ap, ATA_BUSY, 300);
3012 timer_start = jiffies;
3013 timeout = timer_start + tmout_pat;
Tejun Heod1adc1b2006-10-09 18:32:15 +09003014 while (status != 0xff && (status & ATA_BUSY) &&
3015 time_before(jiffies, timeout)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003016 msleep(50);
3017 status = ata_busy_wait(ap, ATA_BUSY, 3);
3018 }
3019
Tejun Heod1adc1b2006-10-09 18:32:15 +09003020 if (status != 0xff && (status & ATA_BUSY))
Tejun Heof15a1da2006-05-15 20:57:56 +09003021 ata_port_printk(ap, KERN_WARNING,
Jeff Garzik35aa7a42006-09-28 06:50:24 -04003022 "port is slow to respond, please be patient "
3023 "(Status 0x%x)\n", status);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003024
3025 timeout = timer_start + tmout;
Tejun Heod1adc1b2006-10-09 18:32:15 +09003026 while (status != 0xff && (status & ATA_BUSY) &&
3027 time_before(jiffies, timeout)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003028 msleep(50);
3029 status = ata_chk_status(ap);
3030 }
3031
Tejun Heod1adc1b2006-10-09 18:32:15 +09003032 if (status == 0xff)
3033 return -ENODEV;
3034
Linus Torvalds1da177e2005-04-16 15:20:36 -07003035 if (status & ATA_BUSY) {
Tejun Heof15a1da2006-05-15 20:57:56 +09003036 ata_port_printk(ap, KERN_ERR, "port failed to respond "
Jeff Garzik35aa7a42006-09-28 06:50:24 -04003037 "(%lu secs, Status 0x%x)\n",
3038 tmout / HZ, status);
Tejun Heod1adc1b2006-10-09 18:32:15 +09003039 return -EBUSY;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003040 }
3041
3042 return 0;
3043}
3044
Tejun Heod4b2bab2007-02-02 16:50:52 +09003045/**
3046 * ata_wait_ready - sleep until BSY clears, or timeout
3047 * @ap: port containing status register to be polled
3048 * @deadline: deadline jiffies for the operation
3049 *
3050 * Sleep until ATA Status register bit BSY clears, or timeout
3051 * occurs.
3052 *
3053 * LOCKING:
3054 * Kernel thread context (may sleep).
3055 *
3056 * RETURNS:
3057 * 0 on success, -errno otherwise.
3058 */
3059int ata_wait_ready(struct ata_port *ap, unsigned long deadline)
3060{
3061 unsigned long start = jiffies;
3062 int warned = 0;
3063
3064 while (1) {
3065 u8 status = ata_chk_status(ap);
3066 unsigned long now = jiffies;
3067
3068 if (!(status & ATA_BUSY))
3069 return 0;
Tejun Heo936fd732007-08-06 18:36:23 +09003070 if (!ata_link_online(&ap->link) && status == 0xff)
Tejun Heod4b2bab2007-02-02 16:50:52 +09003071 return -ENODEV;
3072 if (time_after(now, deadline))
3073 return -EBUSY;
3074
3075 if (!warned && time_after(now, start + 5 * HZ) &&
3076 (deadline - now > 3 * HZ)) {
3077 ata_port_printk(ap, KERN_WARNING,
3078 "port is slow to respond, please be patient "
3079 "(Status 0x%x)\n", status);
3080 warned = 1;
3081 }
3082
3083 msleep(50);
3084 }
3085}
3086
3087static int ata_bus_post_reset(struct ata_port *ap, unsigned int devmask,
3088 unsigned long deadline)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003089{
3090 struct ata_ioports *ioaddr = &ap->ioaddr;
3091 unsigned int dev0 = devmask & (1 << 0);
3092 unsigned int dev1 = devmask & (1 << 1);
Tejun Heo9b893912007-02-02 16:50:52 +09003093 int rc, ret = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003094
3095 /* if device 0 was found in ata_devchk, wait for its
3096 * BSY bit to clear
3097 */
Tejun Heod4b2bab2007-02-02 16:50:52 +09003098 if (dev0) {
3099 rc = ata_wait_ready(ap, deadline);
Tejun Heo9b893912007-02-02 16:50:52 +09003100 if (rc) {
3101 if (rc != -ENODEV)
3102 return rc;
3103 ret = rc;
3104 }
Tejun Heod4b2bab2007-02-02 16:50:52 +09003105 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003106
Tejun Heoe141d992007-06-10 14:26:20 +09003107 /* if device 1 was found in ata_devchk, wait for register
3108 * access briefly, then wait for BSY to clear.
Linus Torvalds1da177e2005-04-16 15:20:36 -07003109 */
Tejun Heoe141d992007-06-10 14:26:20 +09003110 if (dev1) {
3111 int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003112
3113 ap->ops->dev_select(ap, 1);
Tejun Heoe141d992007-06-10 14:26:20 +09003114
3115 /* Wait for register access. Some ATAPI devices fail
3116 * to set nsect/lbal after reset, so don't waste too
3117 * much time on it. We're gonna wait for !BSY anyway.
3118 */
3119 for (i = 0; i < 2; i++) {
3120 u8 nsect, lbal;
3121
3122 nsect = ioread8(ioaddr->nsect_addr);
3123 lbal = ioread8(ioaddr->lbal_addr);
3124 if ((nsect == 1) && (lbal == 1))
3125 break;
3126 msleep(50); /* give drive a breather */
3127 }
3128
Tejun Heod4b2bab2007-02-02 16:50:52 +09003129 rc = ata_wait_ready(ap, deadline);
Tejun Heo9b893912007-02-02 16:50:52 +09003130 if (rc) {
3131 if (rc != -ENODEV)
3132 return rc;
3133 ret = rc;
3134 }
Tejun Heod4b2bab2007-02-02 16:50:52 +09003135 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003136
3137 /* is all this really necessary? */
3138 ap->ops->dev_select(ap, 0);
3139 if (dev1)
3140 ap->ops->dev_select(ap, 1);
3141 if (dev0)
3142 ap->ops->dev_select(ap, 0);
Tejun Heod4b2bab2007-02-02 16:50:52 +09003143
Tejun Heo9b893912007-02-02 16:50:52 +09003144 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003145}
3146
Tejun Heod4b2bab2007-02-02 16:50:52 +09003147static int ata_bus_softreset(struct ata_port *ap, unsigned int devmask,
3148 unsigned long deadline)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003149{
3150 struct ata_ioports *ioaddr = &ap->ioaddr;
3151
Tejun Heo44877b42007-02-21 01:06:51 +09003152 DPRINTK("ata%u: bus reset via SRST\n", ap->print_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003153
3154 /* software reset. causes dev0 to be selected */
Tejun Heo0d5ff562007-02-01 15:06:36 +09003155 iowrite8(ap->ctl, ioaddr->ctl_addr);
3156 udelay(20); /* FIXME: flush */
3157 iowrite8(ap->ctl | ATA_SRST, ioaddr->ctl_addr);
3158 udelay(20); /* FIXME: flush */
3159 iowrite8(ap->ctl, ioaddr->ctl_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003160
3161 /* spec mandates ">= 2ms" before checking status.
3162 * We wait 150ms, because that was the magic delay used for
3163 * ATAPI devices in Hale Landis's ATADRVR, for the period of time
3164 * between when the ATA command register is written, and then
3165 * status is checked. Because waiting for "a while" before
3166 * checking status is fine, post SRST, we perform this magic
3167 * delay here as well.
Alan Cox09c7ad72006-03-22 15:52:40 +00003168 *
3169 * Old drivers/ide uses the 2mS rule and then waits for ready
Linus Torvalds1da177e2005-04-16 15:20:36 -07003170 */
3171 msleep(150);
3172
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05003173 /* Before we perform post reset processing we want to see if
Tejun Heo298a41c2006-03-25 02:58:13 +09003174 * the bus shows 0xFF because the odd clown forgets the D7
3175 * pulldown resistor.
3176 */
Tejun Heod1adc1b2006-10-09 18:32:15 +09003177 if (ata_check_status(ap) == 0xFF)
Tejun Heo9b893912007-02-02 16:50:52 +09003178 return -ENODEV;
Alan Cox09c7ad72006-03-22 15:52:40 +00003179
Tejun Heod4b2bab2007-02-02 16:50:52 +09003180 return ata_bus_post_reset(ap, devmask, deadline);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003181}
3182
3183/**
3184 * ata_bus_reset - reset host port and associated ATA channel
3185 * @ap: port to reset
3186 *
3187 * This is typically the first time we actually start issuing
3188 * commands to the ATA channel. We wait for BSY to clear, then
3189 * issue EXECUTE DEVICE DIAGNOSTIC command, polling for its
3190 * result. Determine what devices, if any, are on the channel
3191 * by looking at the device 0/1 error register. Look at the signature
3192 * stored in each device's taskfile registers, to determine if
3193 * the device is ATA or ATAPI.
3194 *
3195 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04003196 * PCI/etc. bus probe sem.
Jeff Garzikcca39742006-08-24 03:19:22 -04003197 * Obtains host lock.
Linus Torvalds1da177e2005-04-16 15:20:36 -07003198 *
3199 * SIDE EFFECTS:
Tejun Heo198e0fe2006-04-02 18:51:52 +09003200 * Sets ATA_FLAG_DISABLED if bus reset fails.
Linus Torvalds1da177e2005-04-16 15:20:36 -07003201 */
3202
3203void ata_bus_reset(struct ata_port *ap)
3204{
Tejun Heo9af5c9c2007-08-06 18:36:22 +09003205 struct ata_device *device = ap->link.device;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003206 struct ata_ioports *ioaddr = &ap->ioaddr;
3207 unsigned int slave_possible = ap->flags & ATA_FLAG_SLAVE_POSS;
3208 u8 err;
Tejun Heoaec5c3c2006-03-25 01:33:34 +09003209 unsigned int dev0, dev1 = 0, devmask = 0;
Tejun Heo9b893912007-02-02 16:50:52 +09003210 int rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003211
Tejun Heo44877b42007-02-21 01:06:51 +09003212 DPRINTK("ENTER, host %u, port %u\n", ap->print_id, ap->port_no);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003213
3214 /* determine if device 0/1 are present */
3215 if (ap->flags & ATA_FLAG_SATA_RESET)
3216 dev0 = 1;
3217 else {
3218 dev0 = ata_devchk(ap, 0);
3219 if (slave_possible)
3220 dev1 = ata_devchk(ap, 1);
3221 }
3222
3223 if (dev0)
3224 devmask |= (1 << 0);
3225 if (dev1)
3226 devmask |= (1 << 1);
3227
3228 /* select device 0 again */
3229 ap->ops->dev_select(ap, 0);
3230
3231 /* issue bus reset */
Tejun Heo9b893912007-02-02 16:50:52 +09003232 if (ap->flags & ATA_FLAG_SRST) {
3233 rc = ata_bus_softreset(ap, devmask, jiffies + 40 * HZ);
3234 if (rc && rc != -ENODEV)
Tejun Heoaec5c3c2006-03-25 01:33:34 +09003235 goto err_out;
Tejun Heo9b893912007-02-02 16:50:52 +09003236 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003237
3238 /*
3239 * determine by signature whether we have ATA or ATAPI devices
3240 */
Tejun Heo3f198592007-09-02 23:23:57 +09003241 device[0].class = ata_dev_try_classify(&device[0], dev0, &err);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003242 if ((slave_possible) && (err != 0x81))
Tejun Heo3f198592007-09-02 23:23:57 +09003243 device[1].class = ata_dev_try_classify(&device[1], dev1, &err);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003244
Linus Torvalds1da177e2005-04-16 15:20:36 -07003245 /* is double-select really necessary? */
Tejun Heo9af5c9c2007-08-06 18:36:22 +09003246 if (device[1].class != ATA_DEV_NONE)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003247 ap->ops->dev_select(ap, 1);
Tejun Heo9af5c9c2007-08-06 18:36:22 +09003248 if (device[0].class != ATA_DEV_NONE)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003249 ap->ops->dev_select(ap, 0);
3250
3251 /* if no devices were detected, disable this port */
Tejun Heo9af5c9c2007-08-06 18:36:22 +09003252 if ((device[0].class == ATA_DEV_NONE) &&
3253 (device[1].class == ATA_DEV_NONE))
Linus Torvalds1da177e2005-04-16 15:20:36 -07003254 goto err_out;
3255
3256 if (ap->flags & (ATA_FLAG_SATA_RESET | ATA_FLAG_SRST)) {
3257 /* set up device control for ATA_FLAG_SATA_RESET */
Tejun Heo0d5ff562007-02-01 15:06:36 +09003258 iowrite8(ap->ctl, ioaddr->ctl_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003259 }
3260
3261 DPRINTK("EXIT\n");
3262 return;
3263
3264err_out:
Tejun Heof15a1da2006-05-15 20:57:56 +09003265 ata_port_printk(ap, KERN_ERR, "disabling port\n");
Jeff Garzikac8869d2007-08-16 03:17:03 -04003266 ata_port_disable(ap);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003267
3268 DPRINTK("EXIT\n");
3269}
3270
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003271/**
Tejun Heo936fd732007-08-06 18:36:23 +09003272 * sata_link_debounce - debounce SATA phy status
3273 * @link: ATA link to debounce SATA phy status for
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003274 * @params: timing parameters { interval, duratinon, timeout } in msec
Tejun Heod4b2bab2007-02-02 16:50:52 +09003275 * @deadline: deadline jiffies for the operation
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003276 *
Tejun Heo936fd732007-08-06 18:36:23 +09003277* Make sure SStatus of @link reaches stable state, determined by
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003278 * holding the same value where DET is not 1 for @duration polled
3279 * every @interval, before @timeout. Timeout constraints the
Tejun Heod4b2bab2007-02-02 16:50:52 +09003280 * beginning of the stable state. Because DET gets stuck at 1 on
3281 * some controllers after hot unplugging, this functions waits
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003282 * until timeout then returns 0 if DET is stable at 1.
3283 *
Tejun Heod4b2bab2007-02-02 16:50:52 +09003284 * @timeout is further limited by @deadline. The sooner of the
3285 * two is used.
3286 *
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003287 * LOCKING:
3288 * Kernel thread context (may sleep)
3289 *
3290 * RETURNS:
3291 * 0 on success, -errno on failure.
3292 */
Tejun Heo936fd732007-08-06 18:36:23 +09003293int sata_link_debounce(struct ata_link *link, const unsigned long *params,
3294 unsigned long deadline)
Tejun Heo7a7921e2006-02-02 18:20:00 +09003295{
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003296 unsigned long interval_msec = params[0];
Tejun Heod4b2bab2007-02-02 16:50:52 +09003297 unsigned long duration = msecs_to_jiffies(params[1]);
3298 unsigned long last_jiffies, t;
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003299 u32 last, cur;
3300 int rc;
3301
Tejun Heod4b2bab2007-02-02 16:50:52 +09003302 t = jiffies + msecs_to_jiffies(params[2]);
3303 if (time_before(t, deadline))
3304 deadline = t;
3305
Tejun Heo936fd732007-08-06 18:36:23 +09003306 if ((rc = sata_scr_read(link, SCR_STATUS, &cur)))
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003307 return rc;
3308 cur &= 0xf;
3309
3310 last = cur;
3311 last_jiffies = jiffies;
3312
3313 while (1) {
3314 msleep(interval_msec);
Tejun Heo936fd732007-08-06 18:36:23 +09003315 if ((rc = sata_scr_read(link, SCR_STATUS, &cur)))
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003316 return rc;
3317 cur &= 0xf;
3318
3319 /* DET stable? */
3320 if (cur == last) {
Tejun Heod4b2bab2007-02-02 16:50:52 +09003321 if (cur == 1 && time_before(jiffies, deadline))
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003322 continue;
3323 if (time_after(jiffies, last_jiffies + duration))
3324 return 0;
3325 continue;
3326 }
3327
3328 /* unstable, start over */
3329 last = cur;
3330 last_jiffies = jiffies;
3331
Tejun Heof1545152007-07-16 14:29:40 +09003332 /* Check deadline. If debouncing failed, return
3333 * -EPIPE to tell upper layer to lower link speed.
3334 */
Tejun Heod4b2bab2007-02-02 16:50:52 +09003335 if (time_after(jiffies, deadline))
Tejun Heof1545152007-07-16 14:29:40 +09003336 return -EPIPE;
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003337 }
3338}
3339
3340/**
Tejun Heo936fd732007-08-06 18:36:23 +09003341 * sata_link_resume - resume SATA link
3342 * @link: ATA link to resume SATA
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003343 * @params: timing parameters { interval, duratinon, timeout } in msec
Tejun Heod4b2bab2007-02-02 16:50:52 +09003344 * @deadline: deadline jiffies for the operation
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003345 *
Tejun Heo936fd732007-08-06 18:36:23 +09003346 * Resume SATA phy @link and debounce it.
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003347 *
3348 * LOCKING:
3349 * Kernel thread context (may sleep)
3350 *
3351 * RETURNS:
3352 * 0 on success, -errno on failure.
3353 */
Tejun Heo936fd732007-08-06 18:36:23 +09003354int sata_link_resume(struct ata_link *link, const unsigned long *params,
3355 unsigned long deadline)
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003356{
3357 u32 scontrol;
Tejun Heo81952c52006-05-15 20:57:47 +09003358 int rc;
Tejun Heo7a7921e2006-02-02 18:20:00 +09003359
Tejun Heo936fd732007-08-06 18:36:23 +09003360 if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
Tejun Heo81952c52006-05-15 20:57:47 +09003361 return rc;
3362
Tejun Heo852ee162006-04-01 01:38:18 +09003363 scontrol = (scontrol & 0x0f0) | 0x300;
Tejun Heo81952c52006-05-15 20:57:47 +09003364
Tejun Heo936fd732007-08-06 18:36:23 +09003365 if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol)))
Tejun Heo81952c52006-05-15 20:57:47 +09003366 return rc;
Tejun Heo7a7921e2006-02-02 18:20:00 +09003367
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003368 /* Some PHYs react badly if SStatus is pounded immediately
3369 * after resuming. Delay 200ms before debouncing.
3370 */
3371 msleep(200);
Tejun Heo7a7921e2006-02-02 18:20:00 +09003372
Tejun Heo936fd732007-08-06 18:36:23 +09003373 return sata_link_debounce(link, params, deadline);
Tejun Heo7a7921e2006-02-02 18:20:00 +09003374}
3375
Tejun Heof5914a42006-05-31 18:27:48 +09003376/**
3377 * ata_std_prereset - prepare for reset
Tejun Heocc0680a2007-08-06 18:36:23 +09003378 * @link: ATA link to be reset
Tejun Heod4b2bab2007-02-02 16:50:52 +09003379 * @deadline: deadline jiffies for the operation
Tejun Heof5914a42006-05-31 18:27:48 +09003380 *
Tejun Heocc0680a2007-08-06 18:36:23 +09003381 * @link is about to be reset. Initialize it. Failure from
Tejun Heob8cffc62007-02-02 16:50:52 +09003382 * prereset makes libata abort whole reset sequence and give up
3383 * that port, so prereset should be best-effort. It does its
3384 * best to prepare for reset sequence but if things go wrong, it
3385 * should just whine, not fail.
Tejun Heof5914a42006-05-31 18:27:48 +09003386 *
3387 * LOCKING:
3388 * Kernel thread context (may sleep)
3389 *
3390 * RETURNS:
3391 * 0 on success, -errno otherwise.
3392 */
Tejun Heocc0680a2007-08-06 18:36:23 +09003393int ata_std_prereset(struct ata_link *link, unsigned long deadline)
Tejun Heof5914a42006-05-31 18:27:48 +09003394{
Tejun Heocc0680a2007-08-06 18:36:23 +09003395 struct ata_port *ap = link->ap;
Tejun Heo936fd732007-08-06 18:36:23 +09003396 struct ata_eh_context *ehc = &link->eh_context;
Tejun Heoe9c83912006-07-03 16:07:26 +09003397 const unsigned long *timing = sata_ehc_deb_timing(ehc);
Tejun Heof5914a42006-05-31 18:27:48 +09003398 int rc;
3399
Tejun Heo31daabd2007-02-02 16:50:52 +09003400 /* handle link resume */
Tejun Heo28324302006-07-03 16:07:26 +09003401 if ((ehc->i.flags & ATA_EHI_RESUME_LINK) &&
Tejun Heo0c887582007-08-06 18:36:23 +09003402 (link->flags & ATA_LFLAG_HRST_TO_RESUME))
Tejun Heo28324302006-07-03 16:07:26 +09003403 ehc->i.action |= ATA_EH_HARDRESET;
3404
Tejun Heof5914a42006-05-31 18:27:48 +09003405 /* if we're about to do hardreset, nothing more to do */
3406 if (ehc->i.action & ATA_EH_HARDRESET)
3407 return 0;
3408
Tejun Heo936fd732007-08-06 18:36:23 +09003409 /* if SATA, resume link */
Tejun Heoa16abc02007-05-21 18:33:47 +02003410 if (ap->flags & ATA_FLAG_SATA) {
Tejun Heo936fd732007-08-06 18:36:23 +09003411 rc = sata_link_resume(link, timing, deadline);
Tejun Heob8cffc62007-02-02 16:50:52 +09003412 /* whine about phy resume failure but proceed */
3413 if (rc && rc != -EOPNOTSUPP)
Tejun Heocc0680a2007-08-06 18:36:23 +09003414 ata_link_printk(link, KERN_WARNING, "failed to resume "
Tejun Heof5914a42006-05-31 18:27:48 +09003415 "link for reset (errno=%d)\n", rc);
Tejun Heof5914a42006-05-31 18:27:48 +09003416 }
3417
3418 /* Wait for !BSY if the controller can wait for the first D2H
3419 * Reg FIS and we don't know that no device is attached.
3420 */
Tejun Heo0c887582007-08-06 18:36:23 +09003421 if (!(link->flags & ATA_LFLAG_SKIP_D2H_BSY) && !ata_link_offline(link)) {
Tejun Heob8cffc62007-02-02 16:50:52 +09003422 rc = ata_wait_ready(ap, deadline);
Tejun Heo6dffaf62007-05-23 11:58:52 +02003423 if (rc && rc != -ENODEV) {
Tejun Heocc0680a2007-08-06 18:36:23 +09003424 ata_link_printk(link, KERN_WARNING, "device not ready "
Tejun Heob8cffc62007-02-02 16:50:52 +09003425 "(errno=%d), forcing hardreset\n", rc);
3426 ehc->i.action |= ATA_EH_HARDRESET;
3427 }
3428 }
Tejun Heof5914a42006-05-31 18:27:48 +09003429
3430 return 0;
3431}
3432
Tejun Heoc2bd5802006-01-24 17:05:22 +09003433/**
3434 * ata_std_softreset - reset host port via ATA SRST
Tejun Heocc0680a2007-08-06 18:36:23 +09003435 * @link: ATA link to reset
Tejun Heoc2bd5802006-01-24 17:05:22 +09003436 * @classes: resulting classes of attached devices
Tejun Heod4b2bab2007-02-02 16:50:52 +09003437 * @deadline: deadline jiffies for the operation
Tejun Heoc2bd5802006-01-24 17:05:22 +09003438 *
Tejun Heo52783c52006-05-31 18:28:22 +09003439 * Reset host port using ATA SRST.
Tejun Heoc2bd5802006-01-24 17:05:22 +09003440 *
3441 * LOCKING:
3442 * Kernel thread context (may sleep)
3443 *
3444 * RETURNS:
3445 * 0 on success, -errno otherwise.
3446 */
Tejun Heocc0680a2007-08-06 18:36:23 +09003447int ata_std_softreset(struct ata_link *link, unsigned int *classes,
Tejun Heod4b2bab2007-02-02 16:50:52 +09003448 unsigned long deadline)
Tejun Heoc2bd5802006-01-24 17:05:22 +09003449{
Tejun Heocc0680a2007-08-06 18:36:23 +09003450 struct ata_port *ap = link->ap;
Tejun Heoc2bd5802006-01-24 17:05:22 +09003451 unsigned int slave_possible = ap->flags & ATA_FLAG_SLAVE_POSS;
Tejun Heod4b2bab2007-02-02 16:50:52 +09003452 unsigned int devmask = 0;
3453 int rc;
Tejun Heoc2bd5802006-01-24 17:05:22 +09003454 u8 err;
3455
3456 DPRINTK("ENTER\n");
3457
Tejun Heo936fd732007-08-06 18:36:23 +09003458 if (ata_link_offline(link)) {
Tejun Heo3a397462006-02-10 23:58:48 +09003459 classes[0] = ATA_DEV_NONE;
3460 goto out;
3461 }
3462
Tejun Heoc2bd5802006-01-24 17:05:22 +09003463 /* determine if device 0/1 are present */
3464 if (ata_devchk(ap, 0))
3465 devmask |= (1 << 0);
3466 if (slave_possible && ata_devchk(ap, 1))
3467 devmask |= (1 << 1);
3468
Tejun Heoc2bd5802006-01-24 17:05:22 +09003469 /* select device 0 again */
3470 ap->ops->dev_select(ap, 0);
3471
3472 /* issue bus reset */
3473 DPRINTK("about to softreset, devmask=%x\n", devmask);
Tejun Heod4b2bab2007-02-02 16:50:52 +09003474 rc = ata_bus_softreset(ap, devmask, deadline);
Tejun Heo9b893912007-02-02 16:50:52 +09003475 /* if link is occupied, -ENODEV too is an error */
Tejun Heo936fd732007-08-06 18:36:23 +09003476 if (rc && (rc != -ENODEV || sata_scr_valid(link))) {
Tejun Heocc0680a2007-08-06 18:36:23 +09003477 ata_link_printk(link, KERN_ERR, "SRST failed (errno=%d)\n", rc);
Tejun Heod4b2bab2007-02-02 16:50:52 +09003478 return rc;
Tejun Heoc2bd5802006-01-24 17:05:22 +09003479 }
3480
3481 /* determine by signature whether we have ATA or ATAPI devices */
Tejun Heo3f198592007-09-02 23:23:57 +09003482 classes[0] = ata_dev_try_classify(&link->device[0],
3483 devmask & (1 << 0), &err);
Tejun Heoc2bd5802006-01-24 17:05:22 +09003484 if (slave_possible && err != 0x81)
Tejun Heo3f198592007-09-02 23:23:57 +09003485 classes[1] = ata_dev_try_classify(&link->device[1],
3486 devmask & (1 << 1), &err);
Tejun Heoc2bd5802006-01-24 17:05:22 +09003487
Tejun Heo3a397462006-02-10 23:58:48 +09003488 out:
Tejun Heoc2bd5802006-01-24 17:05:22 +09003489 DPRINTK("EXIT, classes[0]=%u [1]=%u\n", classes[0], classes[1]);
3490 return 0;
3491}
3492
3493/**
Tejun Heocc0680a2007-08-06 18:36:23 +09003494 * sata_link_hardreset - reset link via SATA phy reset
3495 * @link: link to reset
Tejun Heob6103f62006-11-01 17:59:53 +09003496 * @timing: timing parameters { interval, duratinon, timeout } in msec
Tejun Heod4b2bab2007-02-02 16:50:52 +09003497 * @deadline: deadline jiffies for the operation
Tejun Heoc2bd5802006-01-24 17:05:22 +09003498 *
Tejun Heocc0680a2007-08-06 18:36:23 +09003499 * SATA phy-reset @link using DET bits of SControl register.
Tejun Heoc2bd5802006-01-24 17:05:22 +09003500 *
3501 * LOCKING:
3502 * Kernel thread context (may sleep)
3503 *
3504 * RETURNS:
3505 * 0 on success, -errno otherwise.
3506 */
Tejun Heocc0680a2007-08-06 18:36:23 +09003507int sata_link_hardreset(struct ata_link *link, const unsigned long *timing,
Tejun Heod4b2bab2007-02-02 16:50:52 +09003508 unsigned long deadline)
Tejun Heoc2bd5802006-01-24 17:05:22 +09003509{
Tejun Heo852ee162006-04-01 01:38:18 +09003510 u32 scontrol;
Tejun Heo81952c52006-05-15 20:57:47 +09003511 int rc;
Tejun Heo852ee162006-04-01 01:38:18 +09003512
Tejun Heoc2bd5802006-01-24 17:05:22 +09003513 DPRINTK("ENTER\n");
3514
Tejun Heo936fd732007-08-06 18:36:23 +09003515 if (sata_set_spd_needed(link)) {
Tejun Heo1c3fae42006-04-02 20:53:28 +09003516 /* SATA spec says nothing about how to reconfigure
3517 * spd. To be on the safe side, turn off phy during
3518 * reconfiguration. This works for at least ICH7 AHCI
3519 * and Sil3124.
3520 */
Tejun Heo936fd732007-08-06 18:36:23 +09003521 if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
Tejun Heob6103f62006-11-01 17:59:53 +09003522 goto out;
Tejun Heo81952c52006-05-15 20:57:47 +09003523
Martin Hicksa34b6fc2006-07-05 15:06:13 -04003524 scontrol = (scontrol & 0x0f0) | 0x304;
Tejun Heo81952c52006-05-15 20:57:47 +09003525
Tejun Heo936fd732007-08-06 18:36:23 +09003526 if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol)))
Tejun Heob6103f62006-11-01 17:59:53 +09003527 goto out;
Tejun Heo1c3fae42006-04-02 20:53:28 +09003528
Tejun Heo936fd732007-08-06 18:36:23 +09003529 sata_set_spd(link);
Tejun Heo1c3fae42006-04-02 20:53:28 +09003530 }
3531
3532 /* issue phy wake/reset */
Tejun Heo936fd732007-08-06 18:36:23 +09003533 if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
Tejun Heob6103f62006-11-01 17:59:53 +09003534 goto out;
Tejun Heo81952c52006-05-15 20:57:47 +09003535
Tejun Heo852ee162006-04-01 01:38:18 +09003536 scontrol = (scontrol & 0x0f0) | 0x301;
Tejun Heo81952c52006-05-15 20:57:47 +09003537
Tejun Heo936fd732007-08-06 18:36:23 +09003538 if ((rc = sata_scr_write_flush(link, SCR_CONTROL, scontrol)))
Tejun Heob6103f62006-11-01 17:59:53 +09003539 goto out;
Tejun Heoc2bd5802006-01-24 17:05:22 +09003540
Tejun Heo1c3fae42006-04-02 20:53:28 +09003541 /* Couldn't find anything in SATA I/II specs, but AHCI-1.1
Tejun Heoc2bd5802006-01-24 17:05:22 +09003542 * 10.4.2 says at least 1 ms.
3543 */
3544 msleep(1);
3545
Tejun Heo936fd732007-08-06 18:36:23 +09003546 /* bring link back */
3547 rc = sata_link_resume(link, timing, deadline);
Tejun Heob6103f62006-11-01 17:59:53 +09003548 out:
3549 DPRINTK("EXIT, rc=%d\n", rc);
3550 return rc;
3551}
3552
3553/**
3554 * sata_std_hardreset - reset host port via SATA phy reset
Tejun Heocc0680a2007-08-06 18:36:23 +09003555 * @link: link to reset
Tejun Heob6103f62006-11-01 17:59:53 +09003556 * @class: resulting class of attached device
Tejun Heod4b2bab2007-02-02 16:50:52 +09003557 * @deadline: deadline jiffies for the operation
Tejun Heob6103f62006-11-01 17:59:53 +09003558 *
3559 * SATA phy-reset host port using DET bits of SControl register,
3560 * wait for !BSY and classify the attached device.
3561 *
3562 * LOCKING:
3563 * Kernel thread context (may sleep)
3564 *
3565 * RETURNS:
3566 * 0 on success, -errno otherwise.
3567 */
Tejun Heocc0680a2007-08-06 18:36:23 +09003568int sata_std_hardreset(struct ata_link *link, unsigned int *class,
Tejun Heod4b2bab2007-02-02 16:50:52 +09003569 unsigned long deadline)
Tejun Heob6103f62006-11-01 17:59:53 +09003570{
Tejun Heocc0680a2007-08-06 18:36:23 +09003571 struct ata_port *ap = link->ap;
Tejun Heo936fd732007-08-06 18:36:23 +09003572 const unsigned long *timing = sata_ehc_deb_timing(&link->eh_context);
Tejun Heob6103f62006-11-01 17:59:53 +09003573 int rc;
3574
3575 DPRINTK("ENTER\n");
3576
3577 /* do hardreset */
Tejun Heocc0680a2007-08-06 18:36:23 +09003578 rc = sata_link_hardreset(link, timing, deadline);
Tejun Heob6103f62006-11-01 17:59:53 +09003579 if (rc) {
Tejun Heocc0680a2007-08-06 18:36:23 +09003580 ata_link_printk(link, KERN_ERR,
Tejun Heob6103f62006-11-01 17:59:53 +09003581 "COMRESET failed (errno=%d)\n", rc);
3582 return rc;
3583 }
Tejun Heoc2bd5802006-01-24 17:05:22 +09003584
Tejun Heoc2bd5802006-01-24 17:05:22 +09003585 /* TODO: phy layer with polling, timeouts, etc. */
Tejun Heo936fd732007-08-06 18:36:23 +09003586 if (ata_link_offline(link)) {
Tejun Heoc2bd5802006-01-24 17:05:22 +09003587 *class = ATA_DEV_NONE;
3588 DPRINTK("EXIT, link offline\n");
3589 return 0;
3590 }
3591
Tejun Heo34fee222007-02-02 15:29:27 +09003592 /* wait a while before checking status, see SRST for more info */
3593 msleep(150);
3594
Tejun Heod4b2bab2007-02-02 16:50:52 +09003595 rc = ata_wait_ready(ap, deadline);
Tejun Heo9b893912007-02-02 16:50:52 +09003596 /* link occupied, -ENODEV too is an error */
3597 if (rc) {
Tejun Heocc0680a2007-08-06 18:36:23 +09003598 ata_link_printk(link, KERN_ERR,
Tejun Heod4b2bab2007-02-02 16:50:52 +09003599 "COMRESET failed (errno=%d)\n", rc);
3600 return rc;
Tejun Heoc2bd5802006-01-24 17:05:22 +09003601 }
3602
Tejun Heo3a397462006-02-10 23:58:48 +09003603 ap->ops->dev_select(ap, 0); /* probably unnecessary */
3604
Tejun Heo3f198592007-09-02 23:23:57 +09003605 *class = ata_dev_try_classify(link->device, 1, NULL);
Tejun Heoc2bd5802006-01-24 17:05:22 +09003606
3607 DPRINTK("EXIT, class=%u\n", *class);
3608 return 0;
3609}
3610
3611/**
3612 * ata_std_postreset - standard postreset callback
Tejun Heocc0680a2007-08-06 18:36:23 +09003613 * @link: the target ata_link
Tejun Heoc2bd5802006-01-24 17:05:22 +09003614 * @classes: classes of attached devices
3615 *
3616 * This function is invoked after a successful reset. Note that
3617 * the device might have been reset more than once using
3618 * different reset methods before postreset is invoked.
Tejun Heoc2bd5802006-01-24 17:05:22 +09003619 *
Tejun Heoc2bd5802006-01-24 17:05:22 +09003620 * LOCKING:
3621 * Kernel thread context (may sleep)
3622 */
Tejun Heocc0680a2007-08-06 18:36:23 +09003623void ata_std_postreset(struct ata_link *link, unsigned int *classes)
Tejun Heoc2bd5802006-01-24 17:05:22 +09003624{
Tejun Heocc0680a2007-08-06 18:36:23 +09003625 struct ata_port *ap = link->ap;
Tejun Heodc2b3512006-05-15 20:58:00 +09003626 u32 serror;
3627
Tejun Heoc2bd5802006-01-24 17:05:22 +09003628 DPRINTK("ENTER\n");
3629
Tejun Heoc2bd5802006-01-24 17:05:22 +09003630 /* print link status */
Tejun Heo936fd732007-08-06 18:36:23 +09003631 sata_print_link_status(link);
Tejun Heoc2bd5802006-01-24 17:05:22 +09003632
Tejun Heodc2b3512006-05-15 20:58:00 +09003633 /* clear SError */
Tejun Heo936fd732007-08-06 18:36:23 +09003634 if (sata_scr_read(link, SCR_ERROR, &serror) == 0)
3635 sata_scr_write(link, SCR_ERROR, serror);
Tejun Heodc2b3512006-05-15 20:58:00 +09003636
Tejun Heoc2bd5802006-01-24 17:05:22 +09003637 /* is double-select really necessary? */
3638 if (classes[0] != ATA_DEV_NONE)
3639 ap->ops->dev_select(ap, 1);
3640 if (classes[1] != ATA_DEV_NONE)
3641 ap->ops->dev_select(ap, 0);
3642
Tejun Heo3a397462006-02-10 23:58:48 +09003643 /* bail out if no device is present */
3644 if (classes[0] == ATA_DEV_NONE && classes[1] == ATA_DEV_NONE) {
3645 DPRINTK("EXIT, no device\n");
3646 return;
3647 }
3648
3649 /* set up device control */
Tejun Heo0d5ff562007-02-01 15:06:36 +09003650 if (ap->ioaddr.ctl_addr)
3651 iowrite8(ap->ctl, ap->ioaddr.ctl_addr);
Tejun Heoc2bd5802006-01-24 17:05:22 +09003652
3653 DPRINTK("EXIT\n");
3654}
3655
Tejun Heoa62c0fc2006-01-24 17:05:22 +09003656/**
Tejun Heo623a3122006-03-05 17:55:58 +09003657 * ata_dev_same_device - Determine whether new ID matches configured device
Tejun Heo623a3122006-03-05 17:55:58 +09003658 * @dev: device to compare against
3659 * @new_class: class of the new device
3660 * @new_id: IDENTIFY page of the new device
3661 *
3662 * Compare @new_class and @new_id against @dev and determine
3663 * whether @dev is the device indicated by @new_class and
3664 * @new_id.
3665 *
3666 * LOCKING:
3667 * None.
3668 *
3669 * RETURNS:
3670 * 1 if @dev matches @new_class and @new_id, 0 otherwise.
3671 */
Tejun Heo3373efd2006-05-15 20:57:53 +09003672static int ata_dev_same_device(struct ata_device *dev, unsigned int new_class,
3673 const u16 *new_id)
Tejun Heo623a3122006-03-05 17:55:58 +09003674{
3675 const u16 *old_id = dev->id;
Tejun Heoa0cf7332007-01-02 20:18:49 +09003676 unsigned char model[2][ATA_ID_PROD_LEN + 1];
3677 unsigned char serial[2][ATA_ID_SERNO_LEN + 1];
Tejun Heo623a3122006-03-05 17:55:58 +09003678
3679 if (dev->class != new_class) {
Tejun Heof15a1da2006-05-15 20:57:56 +09003680 ata_dev_printk(dev, KERN_INFO, "class mismatch %d != %d\n",
3681 dev->class, new_class);
Tejun Heo623a3122006-03-05 17:55:58 +09003682 return 0;
3683 }
3684
Tejun Heoa0cf7332007-01-02 20:18:49 +09003685 ata_id_c_string(old_id, model[0], ATA_ID_PROD, sizeof(model[0]));
3686 ata_id_c_string(new_id, model[1], ATA_ID_PROD, sizeof(model[1]));
3687 ata_id_c_string(old_id, serial[0], ATA_ID_SERNO, sizeof(serial[0]));
3688 ata_id_c_string(new_id, serial[1], ATA_ID_SERNO, sizeof(serial[1]));
Tejun Heo623a3122006-03-05 17:55:58 +09003689
3690 if (strcmp(model[0], model[1])) {
Tejun Heof15a1da2006-05-15 20:57:56 +09003691 ata_dev_printk(dev, KERN_INFO, "model number mismatch "
3692 "'%s' != '%s'\n", model[0], model[1]);
Tejun Heo623a3122006-03-05 17:55:58 +09003693 return 0;
3694 }
3695
3696 if (strcmp(serial[0], serial[1])) {
Tejun Heof15a1da2006-05-15 20:57:56 +09003697 ata_dev_printk(dev, KERN_INFO, "serial number mismatch "
3698 "'%s' != '%s'\n", serial[0], serial[1]);
Tejun Heo623a3122006-03-05 17:55:58 +09003699 return 0;
3700 }
3701
Tejun Heo623a3122006-03-05 17:55:58 +09003702 return 1;
3703}
3704
3705/**
Tejun Heofe309112007-05-15 03:28:15 +09003706 * ata_dev_reread_id - Re-read IDENTIFY data
Henrik Kretzschmar3fae4502007-06-19 10:10:50 +02003707 * @dev: target ATA device
Tejun Heobff04642006-11-10 18:08:10 +09003708 * @readid_flags: read ID flags
Tejun Heo623a3122006-03-05 17:55:58 +09003709 *
3710 * Re-read IDENTIFY page and make sure @dev is still attached to
3711 * the port.
3712 *
3713 * LOCKING:
3714 * Kernel thread context (may sleep)
3715 *
3716 * RETURNS:
3717 * 0 on success, negative errno otherwise
3718 */
Tejun Heofe309112007-05-15 03:28:15 +09003719int ata_dev_reread_id(struct ata_device *dev, unsigned int readid_flags)
Tejun Heo623a3122006-03-05 17:55:58 +09003720{
Tejun Heo5eb45c02006-04-02 18:51:52 +09003721 unsigned int class = dev->class;
Tejun Heo9af5c9c2007-08-06 18:36:22 +09003722 u16 *id = (void *)dev->link->ap->sector_buf;
Tejun Heo623a3122006-03-05 17:55:58 +09003723 int rc;
3724
Tejun Heofe635c72006-05-15 20:57:35 +09003725 /* read ID data */
Tejun Heobff04642006-11-10 18:08:10 +09003726 rc = ata_dev_read_id(dev, &class, readid_flags, id);
Tejun Heo623a3122006-03-05 17:55:58 +09003727 if (rc)
Tejun Heofe309112007-05-15 03:28:15 +09003728 return rc;
Tejun Heo623a3122006-03-05 17:55:58 +09003729
3730 /* is the device still there? */
Tejun Heofe309112007-05-15 03:28:15 +09003731 if (!ata_dev_same_device(dev, class, id))
3732 return -ENODEV;
Tejun Heo623a3122006-03-05 17:55:58 +09003733
Tejun Heofe635c72006-05-15 20:57:35 +09003734 memcpy(dev->id, id, sizeof(id[0]) * ATA_ID_WORDS);
Tejun Heofe309112007-05-15 03:28:15 +09003735 return 0;
3736}
3737
3738/**
3739 * ata_dev_revalidate - Revalidate ATA device
3740 * @dev: device to revalidate
3741 * @readid_flags: read ID flags
3742 *
3743 * Re-read IDENTIFY page, make sure @dev is still attached to the
3744 * port and reconfigure it according to the new IDENTIFY page.
3745 *
3746 * LOCKING:
3747 * Kernel thread context (may sleep)
3748 *
3749 * RETURNS:
3750 * 0 on success, negative errno otherwise
3751 */
3752int ata_dev_revalidate(struct ata_device *dev, unsigned int readid_flags)
3753{
Tejun Heo6ddcd3b2007-05-15 03:28:15 +09003754 u64 n_sectors = dev->n_sectors;
Tejun Heofe309112007-05-15 03:28:15 +09003755 int rc;
3756
3757 if (!ata_dev_enabled(dev))
3758 return -ENODEV;
3759
3760 /* re-read ID */
3761 rc = ata_dev_reread_id(dev, readid_flags);
3762 if (rc)
3763 goto fail;
Tejun Heo623a3122006-03-05 17:55:58 +09003764
3765 /* configure device according to the new ID */
Tejun Heoefdaedc2006-11-01 18:38:52 +09003766 rc = ata_dev_configure(dev);
Tejun Heo6ddcd3b2007-05-15 03:28:15 +09003767 if (rc)
3768 goto fail;
3769
3770 /* verify n_sectors hasn't changed */
Tejun Heob54eebd2007-08-17 18:46:51 +09003771 if (dev->class == ATA_DEV_ATA && n_sectors &&
3772 dev->n_sectors != n_sectors) {
Tejun Heo6ddcd3b2007-05-15 03:28:15 +09003773 ata_dev_printk(dev, KERN_INFO, "n_sectors mismatch "
3774 "%llu != %llu\n",
3775 (unsigned long long)n_sectors,
3776 (unsigned long long)dev->n_sectors);
Tejun Heo8270bec2007-08-16 03:02:22 +09003777
3778 /* restore original n_sectors */
3779 dev->n_sectors = n_sectors;
3780
Tejun Heo6ddcd3b2007-05-15 03:28:15 +09003781 rc = -ENODEV;
3782 goto fail;
3783 }
3784
3785 return 0;
Tejun Heo623a3122006-03-05 17:55:58 +09003786
3787 fail:
Tejun Heof15a1da2006-05-15 20:57:56 +09003788 ata_dev_printk(dev, KERN_ERR, "revalidation failed (errno=%d)\n", rc);
Tejun Heo623a3122006-03-05 17:55:58 +09003789 return rc;
3790}
3791
Alan Cox6919a0a2006-10-27 19:08:46 -07003792struct ata_blacklist_entry {
3793 const char *model_num;
3794 const char *model_rev;
3795 unsigned long horkage;
3796};
3797
3798static const struct ata_blacklist_entry ata_device_blacklist [] = {
3799 /* Devices with DMA related problems under Linux */
3800 { "WDC AC11000H", NULL, ATA_HORKAGE_NODMA },
3801 { "WDC AC22100H", NULL, ATA_HORKAGE_NODMA },
3802 { "WDC AC32500H", NULL, ATA_HORKAGE_NODMA },
3803 { "WDC AC33100H", NULL, ATA_HORKAGE_NODMA },
3804 { "WDC AC31600H", NULL, ATA_HORKAGE_NODMA },
3805 { "WDC AC32100H", "24.09P07", ATA_HORKAGE_NODMA },
3806 { "WDC AC23200L", "21.10N21", ATA_HORKAGE_NODMA },
3807 { "Compaq CRD-8241B", NULL, ATA_HORKAGE_NODMA },
3808 { "CRD-8400B", NULL, ATA_HORKAGE_NODMA },
3809 { "CRD-8480B", NULL, ATA_HORKAGE_NODMA },
3810 { "CRD-8482B", NULL, ATA_HORKAGE_NODMA },
3811 { "CRD-84", NULL, ATA_HORKAGE_NODMA },
3812 { "SanDisk SDP3B", NULL, ATA_HORKAGE_NODMA },
3813 { "SanDisk SDP3B-64", NULL, ATA_HORKAGE_NODMA },
3814 { "SANYO CD-ROM CRD", NULL, ATA_HORKAGE_NODMA },
3815 { "HITACHI CDR-8", NULL, ATA_HORKAGE_NODMA },
3816 { "HITACHI CDR-8335", NULL, ATA_HORKAGE_NODMA },
3817 { "HITACHI CDR-8435", NULL, ATA_HORKAGE_NODMA },
3818 { "Toshiba CD-ROM XM-6202B", NULL, ATA_HORKAGE_NODMA },
3819 { "TOSHIBA CD-ROM XM-1702BC", NULL, ATA_HORKAGE_NODMA },
3820 { "CD-532E-A", NULL, ATA_HORKAGE_NODMA },
3821 { "E-IDE CD-ROM CR-840",NULL, ATA_HORKAGE_NODMA },
3822 { "CD-ROM Drive/F5A", NULL, ATA_HORKAGE_NODMA },
3823 { "WPI CDD-820", NULL, ATA_HORKAGE_NODMA },
3824 { "SAMSUNG CD-ROM SC-148C", NULL, ATA_HORKAGE_NODMA },
3825 { "SAMSUNG CD-ROM SC", NULL, ATA_HORKAGE_NODMA },
Alan Cox6919a0a2006-10-27 19:08:46 -07003826 { "ATAPI CD-ROM DRIVE 40X MAXIMUM",NULL,ATA_HORKAGE_NODMA },
3827 { "_NEC DV5800A", NULL, ATA_HORKAGE_NODMA },
3828 { "SAMSUNG CD-ROM SN-124","N001", ATA_HORKAGE_NODMA },
Dave Jones39f19882007-05-21 14:31:03 -04003829 { "Seagate STT20000A", NULL, ATA_HORKAGE_NODMA },
Tejun Heo5acd50f2007-06-10 14:52:36 +09003830 { "IOMEGA ZIP 250 ATAPI", NULL, ATA_HORKAGE_NODMA }, /* temporary fix */
Tejun Heo39ce7122007-07-05 12:31:31 +09003831 { "IOMEGA ZIP 250 ATAPI Floppy",
3832 NULL, ATA_HORKAGE_NODMA },
Alan Cox6919a0a2006-10-27 19:08:46 -07003833
Albert Lee18d6e9d2007-04-02 11:34:15 +08003834 /* Weird ATAPI devices */
Tejun Heo40a1d532007-06-27 02:49:38 +09003835 { "TORiSAN DVD-ROM DRD-N216", NULL, ATA_HORKAGE_MAX_SEC_128 },
Albert Lee18d6e9d2007-04-02 11:34:15 +08003836
Alan Cox6919a0a2006-10-27 19:08:46 -07003837 /* Devices we expect to fail diagnostics */
3838
3839 /* Devices where NCQ should be avoided */
3840 /* NCQ is slow */
3841 { "WDC WD740ADFD-00", NULL, ATA_HORKAGE_NONCQ },
Tejun Heo09125ea2007-02-28 15:21:23 +09003842 /* http://thread.gmane.org/gmane.linux.ide/14907 */
3843 { "FUJITSU MHT2060BH", NULL, ATA_HORKAGE_NONCQ },
Paul Rolland7acfaf32007-03-26 21:43:44 -08003844 /* NCQ is broken */
Jeff Garzik539cc7c2007-09-20 16:31:47 -04003845 { "Maxtor *", "BANC*", ATA_HORKAGE_NONCQ },
Alan Cox0e3dbc02007-09-20 15:22:47 +01003846 { "Maxtor 7V300F0", "VA111630", ATA_HORKAGE_NONCQ },
Prarit Bhargava2f8d90a2007-07-10 18:13:28 -04003847 { "HITACHI HDS7250SASUN500G 0621KTAWSD", "K2AOAJ0AHITACHI",
Jeff Garzik539cc7c2007-09-20 16:31:47 -04003848 ATA_HORKAGE_NONCQ },
3849
Robert Hancock36e337d2007-04-02 22:05:29 -06003850 /* Blacklist entries taken from Silicon Image 3124/3132
3851 Windows driver .inf file - also several Linux problem reports */
3852 { "HTS541060G9SA00", "MB3OC60D", ATA_HORKAGE_NONCQ, },
3853 { "HTS541080G9SA00", "MB4OC60D", ATA_HORKAGE_NONCQ, },
3854 { "HTS541010G9SA00", "MBZOC60D", ATA_HORKAGE_NONCQ, },
Tejun Heobd9c5a32007-06-08 22:20:59 +09003855 /* Drives which do spurious command completion */
3856 { "HTS541680J9SA00", "SB2IC7EP", ATA_HORKAGE_NONCQ, },
Tejun Heo2f8fceb2007-06-18 14:38:41 +09003857 { "HTS541612J9SA00", "SBDIC7JP", ATA_HORKAGE_NONCQ, },
Tejun Heoe14cbfa2007-06-25 11:28:59 +09003858 { "Hitachi HTS541616J9SA00", "SB4OC70P", ATA_HORKAGE_NONCQ, },
Tejun Heo2f8fceb2007-06-18 14:38:41 +09003859 { "WDC WD740ADFD-00NLR1", NULL, ATA_HORKAGE_NONCQ, },
Tejun Heoa520f262007-07-10 16:16:18 +09003860 { "FUJITSU MHV2080BH", "00840028", ATA_HORKAGE_NONCQ, },
Tejun Heo3fb65892007-07-20 12:49:38 +09003861 { "ST9160821AS", "3.CLF", ATA_HORKAGE_NONCQ, },
Alan Cox0e3dbc02007-09-20 15:22:47 +01003862 { "ST3160812AS", "3.AD", ATA_HORKAGE_NONCQ, },
Tejun Heo5d6aca82007-07-28 16:25:25 +09003863 { "SAMSUNG HD401LJ", "ZZ100-15", ATA_HORKAGE_NONCQ, },
Alan Cox6919a0a2006-10-27 19:08:46 -07003864
Tejun Heo16c55b02007-08-29 11:58:33 +09003865 /* devices which puke on READ_NATIVE_MAX */
3866 { "HDS724040KLSA80", "KFAOA20N", ATA_HORKAGE_BROKEN_HPA, },
3867 { "WDC WD3200JD-00KLB0", "WD-WCAMR1130137", ATA_HORKAGE_BROKEN_HPA },
3868 { "WDC WD2500JD-00HBB0", "WD-WMAL71490727", ATA_HORKAGE_BROKEN_HPA },
3869 { "MAXTOR 6L080L4", "A93.0500", ATA_HORKAGE_BROKEN_HPA },
Alan Cox6919a0a2006-10-27 19:08:46 -07003870
3871 /* End Marker */
3872 { }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003873};
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05003874
Jeff Garzik539cc7c2007-09-20 16:31:47 -04003875int strn_pattern_cmp(const char *patt, const char *name, int wildchar)
3876{
3877 const char *p;
3878 int len;
3879
3880 /*
3881 * check for trailing wildcard: *\0
3882 */
3883 p = strchr(patt, wildchar);
3884 if (p && ((*(p + 1)) == 0))
3885 len = p - patt;
3886 else
3887 len = strlen(name);
3888
3889 return strncmp(patt, name, len);
3890}
3891
Tejun Heo75683fe2007-07-05 13:31:27 +09003892static unsigned long ata_dev_blacklisted(const struct ata_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003893{
Tejun Heo8bfa79f2007-01-02 20:19:40 +09003894 unsigned char model_num[ATA_ID_PROD_LEN + 1];
3895 unsigned char model_rev[ATA_ID_FW_REV_LEN + 1];
Alan Cox6919a0a2006-10-27 19:08:46 -07003896 const struct ata_blacklist_entry *ad = ata_device_blacklist;
Albert Lee3a778272006-06-22 13:00:25 +08003897
Tejun Heo8bfa79f2007-01-02 20:19:40 +09003898 ata_id_c_string(dev->id, model_num, ATA_ID_PROD, sizeof(model_num));
3899 ata_id_c_string(dev->id, model_rev, ATA_ID_FW_REV, sizeof(model_rev));
Linus Torvalds1da177e2005-04-16 15:20:36 -07003900
Alan Cox6919a0a2006-10-27 19:08:46 -07003901 while (ad->model_num) {
Jeff Garzik539cc7c2007-09-20 16:31:47 -04003902 if (!strn_pattern_cmp(ad->model_num, model_num, '*')) {
Alan Cox6919a0a2006-10-27 19:08:46 -07003903 if (ad->model_rev == NULL)
3904 return ad->horkage;
Jeff Garzik539cc7c2007-09-20 16:31:47 -04003905 if (!strn_pattern_cmp(ad->model_rev, model_rev, '*'))
Alan Cox6919a0a2006-10-27 19:08:46 -07003906 return ad->horkage;
Alan Coxf4b15fe2006-03-22 15:54:04 +00003907 }
Alan Cox6919a0a2006-10-27 19:08:46 -07003908 ad++;
Alan Coxf4b15fe2006-03-22 15:54:04 +00003909 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003910 return 0;
3911}
3912
Alan Cox6919a0a2006-10-27 19:08:46 -07003913static int ata_dma_blacklisted(const struct ata_device *dev)
3914{
3915 /* We don't support polling DMA.
3916 * DMA blacklist those ATAPI devices with CDB-intr (and use PIO)
3917 * if the LLDD handles only interrupts in the HSM_ST_LAST state.
3918 */
Tejun Heo9af5c9c2007-08-06 18:36:22 +09003919 if ((dev->link->ap->flags & ATA_FLAG_PIO_POLLING) &&
Alan Cox6919a0a2006-10-27 19:08:46 -07003920 (dev->flags & ATA_DFLAG_CDB_INTR))
3921 return 1;
Tejun Heo75683fe2007-07-05 13:31:27 +09003922 return (dev->horkage & ATA_HORKAGE_NODMA) ? 1 : 0;
Alan Cox6919a0a2006-10-27 19:08:46 -07003923}
3924
Tejun Heoa6d5a512006-03-06 04:31:57 +09003925/**
3926 * ata_dev_xfermask - Compute supported xfermask of the given device
Tejun Heoa6d5a512006-03-06 04:31:57 +09003927 * @dev: Device to compute xfermask for
3928 *
Tejun Heoacf356b2006-03-24 14:07:50 +09003929 * Compute supported xfermask of @dev and store it in
3930 * dev->*_mask. This function is responsible for applying all
3931 * known limits including host controller limits, device
3932 * blacklist, etc...
Tejun Heoa6d5a512006-03-06 04:31:57 +09003933 *
3934 * LOCKING:
3935 * None.
Tejun Heoa6d5a512006-03-06 04:31:57 +09003936 */
Tejun Heo3373efd2006-05-15 20:57:53 +09003937static void ata_dev_xfermask(struct ata_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003938{
Tejun Heo9af5c9c2007-08-06 18:36:22 +09003939 struct ata_link *link = dev->link;
3940 struct ata_port *ap = link->ap;
Jeff Garzikcca39742006-08-24 03:19:22 -04003941 struct ata_host *host = ap->host;
Tejun Heoa6d5a512006-03-06 04:31:57 +09003942 unsigned long xfer_mask;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003943
Tejun Heo37deecb2006-08-10 16:59:07 +09003944 /* controller modes available */
Tejun Heo565083e2006-04-02 17:54:47 +09003945 xfer_mask = ata_pack_xfermask(ap->pio_mask,
3946 ap->mwdma_mask, ap->udma_mask);
3947
Robert Hancock8343f882007-03-06 02:37:51 -08003948 /* drive modes available */
Tejun Heo37deecb2006-08-10 16:59:07 +09003949 xfer_mask &= ata_pack_xfermask(dev->pio_mask,
3950 dev->mwdma_mask, dev->udma_mask);
3951 xfer_mask &= ata_id_xfermask(dev->id);
Tejun Heo565083e2006-04-02 17:54:47 +09003952
Alan Coxb352e572006-08-10 18:52:12 +01003953 /*
3954 * CFA Advanced TrueIDE timings are not allowed on a shared
3955 * cable
3956 */
3957 if (ata_dev_pair(dev)) {
3958 /* No PIO5 or PIO6 */
3959 xfer_mask &= ~(0x03 << (ATA_SHIFT_PIO + 5));
3960 /* No MWDMA3 or MWDMA 4 */
3961 xfer_mask &= ~(0x03 << (ATA_SHIFT_MWDMA + 3));
3962 }
3963
Tejun Heo37deecb2006-08-10 16:59:07 +09003964 if (ata_dma_blacklisted(dev)) {
3965 xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA);
Tejun Heof15a1da2006-05-15 20:57:56 +09003966 ata_dev_printk(dev, KERN_WARNING,
3967 "device is on DMA blacklist, disabling DMA\n");
Tejun Heo37deecb2006-08-10 16:59:07 +09003968 }
Tejun Heoa6d5a512006-03-06 04:31:57 +09003969
Petr Vandrovec14d66ab2007-03-08 10:12:12 +01003970 if ((host->flags & ATA_HOST_SIMPLEX) &&
3971 host->simplex_claimed && host->simplex_claimed != ap) {
Tejun Heo37deecb2006-08-10 16:59:07 +09003972 xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA);
3973 ata_dev_printk(dev, KERN_WARNING, "simplex DMA is claimed by "
3974 "other device, disabling DMA\n");
Alan Cox5444a6f2006-03-27 18:58:20 +01003975 }
Tejun Heo565083e2006-04-02 17:54:47 +09003976
Jeff Garzike4246752007-03-09 09:56:46 -05003977 if (ap->flags & ATA_FLAG_NO_IORDY)
3978 xfer_mask &= ata_pio_mask_no_iordy(dev);
3979
Alan Cox5444a6f2006-03-27 18:58:20 +01003980 if (ap->ops->mode_filter)
Alan Coxa76b62c2007-03-09 09:34:07 -05003981 xfer_mask = ap->ops->mode_filter(dev, xfer_mask);
Alan Cox5444a6f2006-03-27 18:58:20 +01003982
Robert Hancock8343f882007-03-06 02:37:51 -08003983 /* Apply cable rule here. Don't apply it early because when
3984 * we handle hot plug the cable type can itself change.
3985 * Check this last so that we know if the transfer rate was
3986 * solely limited by the cable.
3987 * Unknown or 80 wire cables reported host side are checked
3988 * drive side as well. Cases where we know a 40wire cable
3989 * is used safely for 80 are not checked here.
3990 */
3991 if (xfer_mask & (0xF8 << ATA_SHIFT_UDMA))
3992 /* UDMA/44 or higher would be available */
3993 if((ap->cbl == ATA_CBL_PATA40) ||
3994 (ata_drive_40wire(dev->id) &&
3995 (ap->cbl == ATA_CBL_PATA_UNK ||
3996 ap->cbl == ATA_CBL_PATA80))) {
3997 ata_dev_printk(dev, KERN_WARNING,
3998 "limited to UDMA/33 due to 40-wire cable\n");
3999 xfer_mask &= ~(0xF8 << ATA_SHIFT_UDMA);
4000 }
4001
Tejun Heo565083e2006-04-02 17:54:47 +09004002 ata_unpack_xfermask(xfer_mask, &dev->pio_mask,
4003 &dev->mwdma_mask, &dev->udma_mask);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004004}
4005
Linus Torvalds1da177e2005-04-16 15:20:36 -07004006/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07004007 * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command
Linus Torvalds1da177e2005-04-16 15:20:36 -07004008 * @dev: Device to which command will be sent
4009 *
Jeff Garzik780a87f2005-05-30 15:41:05 -04004010 * Issue SET FEATURES - XFER MODE command to device @dev
4011 * on port @ap.
4012 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07004013 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04004014 * PCI/etc. bus probe sem.
Tejun Heo83206a22006-03-24 15:25:31 +09004015 *
4016 * RETURNS:
4017 * 0 on success, AC_ERR_* mask otherwise.
Linus Torvalds1da177e2005-04-16 15:20:36 -07004018 */
4019
Tejun Heo3373efd2006-05-15 20:57:53 +09004020static unsigned int ata_dev_set_xfermode(struct ata_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004021{
Tejun Heoa0123702005-12-13 14:49:31 +09004022 struct ata_taskfile tf;
Tejun Heo83206a22006-03-24 15:25:31 +09004023 unsigned int err_mask;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004024
4025 /* set up set-features taskfile */
4026 DPRINTK("set features - xfer mode\n");
4027
Tejun Heo464cf172007-05-27 15:10:40 +02004028 /* Some controllers and ATAPI devices show flaky interrupt
4029 * behavior after setting xfer mode. Use polling instead.
4030 */
Tejun Heo3373efd2006-05-15 20:57:53 +09004031 ata_tf_init(dev, &tf);
Tejun Heoa0123702005-12-13 14:49:31 +09004032 tf.command = ATA_CMD_SET_FEATURES;
4033 tf.feature = SETFEATURES_XFER;
Tejun Heo464cf172007-05-27 15:10:40 +02004034 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_POLLING;
Tejun Heoa0123702005-12-13 14:49:31 +09004035 tf.protocol = ATA_PROT_NODATA;
4036 tf.nsect = dev->xfer_mode;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004037
Tejun Heo3373efd2006-05-15 20:57:53 +09004038 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004039
Tejun Heo83206a22006-03-24 15:25:31 +09004040 DPRINTK("EXIT, err_mask=%x\n", err_mask);
4041 return err_mask;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004042}
4043
4044/**
Kristen Carlson Accardi9f45cbd2007-08-15 03:57:11 -04004045 * ata_dev_set_AN - Issue SET FEATURES - SATA FEATURES
4046 * @dev: Device to which command will be sent
4047 * @enable: Whether to enable or disable the feature
4048 *
4049 * Issue SET FEATURES - SATA FEATURES command to device @dev
4050 * on port @ap with sector count set to indicate Asynchronous
4051 * Notification feature
4052 *
4053 * LOCKING:
4054 * PCI/etc. bus probe sem.
4055 *
4056 * RETURNS:
4057 * 0 on success, AC_ERR_* mask otherwise.
4058 */
4059static unsigned int ata_dev_set_AN(struct ata_device *dev, u8 enable)
4060{
4061 struct ata_taskfile tf;
4062 unsigned int err_mask;
4063
4064 /* set up set-features taskfile */
4065 DPRINTK("set features - SATA features\n");
4066
4067 ata_tf_init(dev, &tf);
4068 tf.command = ATA_CMD_SET_FEATURES;
4069 tf.feature = enable;
4070 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
4071 tf.protocol = ATA_PROT_NODATA;
4072 tf.nsect = SATA_AN;
4073
4074 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0);
4075
4076 DPRINTK("EXIT, err_mask=%x\n", err_mask);
4077 return err_mask;
4078}
4079
4080/**
Albert Lee8bf62ece2005-05-12 15:29:42 -04004081 * ata_dev_init_params - Issue INIT DEV PARAMS command
Albert Lee8bf62ece2005-05-12 15:29:42 -04004082 * @dev: Device to which command will be sent
Randy Dunlape2a7f772006-05-18 10:50:18 -07004083 * @heads: Number of heads (taskfile parameter)
4084 * @sectors: Number of sectors (taskfile parameter)
Albert Lee8bf62ece2005-05-12 15:29:42 -04004085 *
4086 * LOCKING:
Tejun Heo6aff8f12006-02-15 18:24:09 +09004087 * Kernel thread context (may sleep)
4088 *
4089 * RETURNS:
4090 * 0 on success, AC_ERR_* mask otherwise.
Albert Lee8bf62ece2005-05-12 15:29:42 -04004091 */
Tejun Heo3373efd2006-05-15 20:57:53 +09004092static unsigned int ata_dev_init_params(struct ata_device *dev,
4093 u16 heads, u16 sectors)
Albert Lee8bf62ece2005-05-12 15:29:42 -04004094{
Tejun Heoa0123702005-12-13 14:49:31 +09004095 struct ata_taskfile tf;
Tejun Heo6aff8f12006-02-15 18:24:09 +09004096 unsigned int err_mask;
Albert Lee8bf62ece2005-05-12 15:29:42 -04004097
4098 /* Number of sectors per track 1-255. Number of heads 1-16 */
4099 if (sectors < 1 || sectors > 255 || heads < 1 || heads > 16)
Albert Lee00b6f5e2006-03-27 16:39:18 +08004100 return AC_ERR_INVALID;
Albert Lee8bf62ece2005-05-12 15:29:42 -04004101
4102 /* set up init dev params taskfile */
4103 DPRINTK("init dev params \n");
4104
Tejun Heo3373efd2006-05-15 20:57:53 +09004105 ata_tf_init(dev, &tf);
Tejun Heoa0123702005-12-13 14:49:31 +09004106 tf.command = ATA_CMD_INIT_DEV_PARAMS;
4107 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
4108 tf.protocol = ATA_PROT_NODATA;
4109 tf.nsect = sectors;
4110 tf.device |= (heads - 1) & 0x0f; /* max head = num. of heads - 1 */
Albert Lee8bf62ece2005-05-12 15:29:42 -04004111
Tejun Heo3373efd2006-05-15 20:57:53 +09004112 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0);
Alan Cox18b24662007-08-08 14:28:49 +01004113 /* A clean abort indicates an original or just out of spec drive
4114 and we should continue as we issue the setup based on the
4115 drive reported working geometry */
4116 if (err_mask == AC_ERR_DEV && (tf.feature & ATA_ABORTED))
4117 err_mask = 0;
Albert Lee8bf62ece2005-05-12 15:29:42 -04004118
Tejun Heo6aff8f12006-02-15 18:24:09 +09004119 DPRINTK("EXIT, err_mask=%x\n", err_mask);
4120 return err_mask;
Albert Lee8bf62ece2005-05-12 15:29:42 -04004121}
4122
4123/**
Jeff Garzik0cba6322005-05-30 19:49:12 -04004124 * ata_sg_clean - Unmap DMA memory associated with command
4125 * @qc: Command containing DMA memory to be released
4126 *
4127 * Unmap all mapped DMA memory associated with this command.
Linus Torvalds1da177e2005-04-16 15:20:36 -07004128 *
4129 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04004130 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004131 */
Tejun Heo70e6ad02006-11-14 22:47:10 +09004132void ata_sg_clean(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004133{
4134 struct ata_port *ap = qc->ap;
Jeff Garzikcedc9a42005-10-05 07:13:30 -04004135 struct scatterlist *sg = qc->__sg;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004136 int dir = qc->dma_dir;
Jeff Garzikcedc9a42005-10-05 07:13:30 -04004137 void *pad_buf = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004138
Tejun Heoa46314742006-02-11 19:11:13 +09004139 WARN_ON(!(qc->flags & ATA_QCFLAG_DMAMAP));
4140 WARN_ON(sg == NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004141
4142 if (qc->flags & ATA_QCFLAG_SINGLE)
Jeff Garzikf1318832006-02-20 16:55:56 -05004143 WARN_ON(qc->n_elem > 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004144
Jeff Garzik2c13b7c2005-11-14 14:14:16 -05004145 VPRINTK("unmapping %u sg elements\n", qc->n_elem);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004146
Jeff Garzikcedc9a42005-10-05 07:13:30 -04004147 /* if we padded the buffer out to 32-bit bound, and data
4148 * xfer direction is from-device, we must copy from the
4149 * pad buffer back into the supplied buffer
4150 */
4151 if (qc->pad_len && !(qc->tf.flags & ATA_TFLAG_WRITE))
4152 pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ);
4153
4154 if (qc->flags & ATA_QCFLAG_SG) {
Jeff Garzike1410f22005-11-14 14:06:26 -05004155 if (qc->n_elem)
Brian King2f1f6102006-03-23 17:30:15 -06004156 dma_unmap_sg(ap->dev, sg, qc->n_elem, dir);
Jeff Garzikcedc9a42005-10-05 07:13:30 -04004157 /* restore last sg */
4158 sg[qc->orig_n_elem - 1].length += qc->pad_len;
4159 if (pad_buf) {
4160 struct scatterlist *psg = &qc->pad_sgent;
4161 void *addr = kmap_atomic(psg->page, KM_IRQ0);
4162 memcpy(addr + psg->offset, pad_buf, qc->pad_len);
Mark Lorddfa15982005-12-12 23:19:28 -05004163 kunmap_atomic(addr, KM_IRQ0);
Jeff Garzikcedc9a42005-10-05 07:13:30 -04004164 }
4165 } else {
Tejun Heo2e242fa2006-02-20 23:48:38 +09004166 if (qc->n_elem)
Brian King2f1f6102006-03-23 17:30:15 -06004167 dma_unmap_single(ap->dev,
Jeff Garzike1410f22005-11-14 14:06:26 -05004168 sg_dma_address(&sg[0]), sg_dma_len(&sg[0]),
4169 dir);
Jeff Garzikcedc9a42005-10-05 07:13:30 -04004170 /* restore sg */
4171 sg->length += qc->pad_len;
4172 if (pad_buf)
4173 memcpy(qc->buf_virt + sg->length - qc->pad_len,
4174 pad_buf, qc->pad_len);
4175 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07004176
4177 qc->flags &= ~ATA_QCFLAG_DMAMAP;
Jeff Garzikcedc9a42005-10-05 07:13:30 -04004178 qc->__sg = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004179}
4180
4181/**
4182 * ata_fill_sg - Fill PCI IDE PRD table
4183 * @qc: Metadata associated with taskfile to be transferred
4184 *
Jeff Garzik780a87f2005-05-30 15:41:05 -04004185 * Fill PCI IDE PRD (scatter-gather) table with segments
4186 * associated with the current disk command.
4187 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07004188 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04004189 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004190 *
4191 */
4192static void ata_fill_sg(struct ata_queued_cmd *qc)
4193{
Linus Torvalds1da177e2005-04-16 15:20:36 -07004194 struct ata_port *ap = qc->ap;
Jeff Garzikcedc9a42005-10-05 07:13:30 -04004195 struct scatterlist *sg;
4196 unsigned int idx;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004197
Tejun Heoa46314742006-02-11 19:11:13 +09004198 WARN_ON(qc->__sg == NULL);
Jeff Garzikf1318832006-02-20 16:55:56 -05004199 WARN_ON(qc->n_elem == 0 && qc->pad_len == 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004200
4201 idx = 0;
Jeff Garzikcedc9a42005-10-05 07:13:30 -04004202 ata_for_each_sg(sg, qc) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07004203 u32 addr, offset;
4204 u32 sg_len, len;
4205
4206 /* determine if physical DMA addr spans 64K boundary.
4207 * Note h/w doesn't support 64-bit, so we unconditionally
4208 * truncate dma_addr_t to u32.
4209 */
4210 addr = (u32) sg_dma_address(sg);
4211 sg_len = sg_dma_len(sg);
4212
4213 while (sg_len) {
4214 offset = addr & 0xffff;
4215 len = sg_len;
4216 if ((offset + sg_len) > 0x10000)
4217 len = 0x10000 - offset;
4218
4219 ap->prd[idx].addr = cpu_to_le32(addr);
4220 ap->prd[idx].flags_len = cpu_to_le32(len & 0xffff);
4221 VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", idx, addr, len);
4222
4223 idx++;
4224 sg_len -= len;
4225 addr += len;
4226 }
4227 }
4228
4229 if (idx)
4230 ap->prd[idx - 1].flags_len |= cpu_to_le32(ATA_PRD_EOT);
4231}
Tejun Heob9a41972007-06-27 02:48:43 +09004232
Linus Torvalds1da177e2005-04-16 15:20:36 -07004233/**
Alan Coxd26fc952007-07-06 19:13:52 -04004234 * ata_fill_sg_dumb - Fill PCI IDE PRD table
4235 * @qc: Metadata associated with taskfile to be transferred
4236 *
4237 * Fill PCI IDE PRD (scatter-gather) table with segments
4238 * associated with the current disk command. Perform the fill
4239 * so that we avoid writing any length 64K records for
4240 * controllers that don't follow the spec.
4241 *
4242 * LOCKING:
4243 * spin_lock_irqsave(host lock)
4244 *
4245 */
4246static void ata_fill_sg_dumb(struct ata_queued_cmd *qc)
4247{
4248 struct ata_port *ap = qc->ap;
4249 struct scatterlist *sg;
4250 unsigned int idx;
4251
4252 WARN_ON(qc->__sg == NULL);
4253 WARN_ON(qc->n_elem == 0 && qc->pad_len == 0);
4254
4255 idx = 0;
4256 ata_for_each_sg(sg, qc) {
4257 u32 addr, offset;
4258 u32 sg_len, len, blen;
4259
4260 /* determine if physical DMA addr spans 64K boundary.
4261 * Note h/w doesn't support 64-bit, so we unconditionally
4262 * truncate dma_addr_t to u32.
4263 */
4264 addr = (u32) sg_dma_address(sg);
4265 sg_len = sg_dma_len(sg);
4266
4267 while (sg_len) {
4268 offset = addr & 0xffff;
4269 len = sg_len;
4270 if ((offset + sg_len) > 0x10000)
4271 len = 0x10000 - offset;
4272
4273 blen = len & 0xffff;
4274 ap->prd[idx].addr = cpu_to_le32(addr);
4275 if (blen == 0) {
4276 /* Some PATA chipsets like the CS5530 can't
4277 cope with 0x0000 meaning 64K as the spec says */
4278 ap->prd[idx].flags_len = cpu_to_le32(0x8000);
4279 blen = 0x8000;
4280 ap->prd[++idx].addr = cpu_to_le32(addr + 0x8000);
4281 }
4282 ap->prd[idx].flags_len = cpu_to_le32(blen);
4283 VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", idx, addr, len);
4284
4285 idx++;
4286 sg_len -= len;
4287 addr += len;
4288 }
4289 }
4290
4291 if (idx)
4292 ap->prd[idx - 1].flags_len |= cpu_to_le32(ATA_PRD_EOT);
4293}
4294
4295/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07004296 * ata_check_atapi_dma - Check whether ATAPI DMA can be supported
4297 * @qc: Metadata associated with taskfile to check
4298 *
Jeff Garzik780a87f2005-05-30 15:41:05 -04004299 * Allow low-level driver to filter ATA PACKET commands, returning
4300 * a status indicating whether or not it is OK to use DMA for the
4301 * supplied PACKET command.
4302 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07004303 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04004304 * spin_lock_irqsave(host lock)
Jeff Garzik0cba6322005-05-30 19:49:12 -04004305 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07004306 * RETURNS: 0 when ATAPI DMA can be used
4307 * nonzero otherwise
4308 */
4309int ata_check_atapi_dma(struct ata_queued_cmd *qc)
4310{
4311 struct ata_port *ap = qc->ap;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004312
Tejun Heob9a41972007-06-27 02:48:43 +09004313 /* Don't allow DMA if it isn't multiple of 16 bytes. Quite a
4314 * few ATAPI devices choke on such DMA requests.
4315 */
4316 if (unlikely(qc->nbytes & 15))
4317 return 1;
Albert Lee6f23a312007-04-02 11:39:25 +08004318
Linus Torvalds1da177e2005-04-16 15:20:36 -07004319 if (ap->ops->check_atapi_dma)
Tejun Heob9a41972007-06-27 02:48:43 +09004320 return ap->ops->check_atapi_dma(qc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004321
Tejun Heob9a41972007-06-27 02:48:43 +09004322 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004323}
Tejun Heob9a41972007-06-27 02:48:43 +09004324
Linus Torvalds1da177e2005-04-16 15:20:36 -07004325/**
4326 * ata_qc_prep - Prepare taskfile for submission
4327 * @qc: Metadata associated with taskfile to be prepared
4328 *
Jeff Garzik780a87f2005-05-30 15:41:05 -04004329 * Prepare ATA taskfile for submission.
4330 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07004331 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04004332 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004333 */
4334void ata_qc_prep(struct ata_queued_cmd *qc)
4335{
4336 if (!(qc->flags & ATA_QCFLAG_DMAMAP))
4337 return;
4338
4339 ata_fill_sg(qc);
4340}
4341
Alan Coxd26fc952007-07-06 19:13:52 -04004342/**
4343 * ata_dumb_qc_prep - Prepare taskfile for submission
4344 * @qc: Metadata associated with taskfile to be prepared
4345 *
4346 * Prepare ATA taskfile for submission.
4347 *
4348 * LOCKING:
4349 * spin_lock_irqsave(host lock)
4350 */
4351void ata_dumb_qc_prep(struct ata_queued_cmd *qc)
4352{
4353 if (!(qc->flags & ATA_QCFLAG_DMAMAP))
4354 return;
4355
4356 ata_fill_sg_dumb(qc);
4357}
4358
Brian Kinge46834c2006-03-17 17:04:03 -06004359void ata_noop_qc_prep(struct ata_queued_cmd *qc) { }
4360
Jeff Garzik0cba6322005-05-30 19:49:12 -04004361/**
4362 * ata_sg_init_one - Associate command with memory buffer
4363 * @qc: Command to be associated
4364 * @buf: Memory buffer
4365 * @buflen: Length of memory buffer, in bytes.
4366 *
4367 * Initialize the data-related elements of queued_cmd @qc
4368 * to point to a single memory buffer, @buf of byte length @buflen.
4369 *
4370 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04004371 * spin_lock_irqsave(host lock)
Jeff Garzik0cba6322005-05-30 19:49:12 -04004372 */
4373
Linus Torvalds1da177e2005-04-16 15:20:36 -07004374void ata_sg_init_one(struct ata_queued_cmd *qc, void *buf, unsigned int buflen)
4375{
Linus Torvalds1da177e2005-04-16 15:20:36 -07004376 qc->flags |= ATA_QCFLAG_SINGLE;
4377
Jeff Garzikcedc9a42005-10-05 07:13:30 -04004378 qc->__sg = &qc->sgent;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004379 qc->n_elem = 1;
Jeff Garzikcedc9a42005-10-05 07:13:30 -04004380 qc->orig_n_elem = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004381 qc->buf_virt = buf;
Brian King233277c2006-06-07 11:25:31 -05004382 qc->nbytes = buflen;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004383
Tejun Heo61c05962006-11-14 22:35:43 +09004384 sg_init_one(&qc->sgent, buf, buflen);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004385}
4386
Jeff Garzik0cba6322005-05-30 19:49:12 -04004387/**
4388 * ata_sg_init - Associate command with scatter-gather table.
4389 * @qc: Command to be associated
4390 * @sg: Scatter-gather table.
4391 * @n_elem: Number of elements in s/g table.
4392 *
4393 * Initialize the data-related elements of queued_cmd @qc
4394 * to point to a scatter-gather table @sg, containing @n_elem
4395 * elements.
4396 *
4397 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04004398 * spin_lock_irqsave(host lock)
Jeff Garzik0cba6322005-05-30 19:49:12 -04004399 */
4400
Linus Torvalds1da177e2005-04-16 15:20:36 -07004401void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
4402 unsigned int n_elem)
4403{
4404 qc->flags |= ATA_QCFLAG_SG;
Jeff Garzikcedc9a42005-10-05 07:13:30 -04004405 qc->__sg = sg;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004406 qc->n_elem = n_elem;
Jeff Garzikcedc9a42005-10-05 07:13:30 -04004407 qc->orig_n_elem = n_elem;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004408}
4409
4410/**
Jeff Garzik0cba6322005-05-30 19:49:12 -04004411 * ata_sg_setup_one - DMA-map the memory buffer associated with a command.
4412 * @qc: Command with memory buffer to be mapped.
4413 *
4414 * DMA-map the memory buffer associated with queued_cmd @qc.
Linus Torvalds1da177e2005-04-16 15:20:36 -07004415 *
4416 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04004417 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004418 *
4419 * RETURNS:
Jeff Garzik0cba6322005-05-30 19:49:12 -04004420 * Zero on success, negative on error.
Linus Torvalds1da177e2005-04-16 15:20:36 -07004421 */
4422
4423static int ata_sg_setup_one(struct ata_queued_cmd *qc)
4424{
4425 struct ata_port *ap = qc->ap;
4426 int dir = qc->dma_dir;
Jeff Garzikcedc9a42005-10-05 07:13:30 -04004427 struct scatterlist *sg = qc->__sg;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004428 dma_addr_t dma_address;
Tejun Heo2e242fa2006-02-20 23:48:38 +09004429 int trim_sg = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004430
Jeff Garzikcedc9a42005-10-05 07:13:30 -04004431 /* we must lengthen transfers to end on a 32-bit boundary */
4432 qc->pad_len = sg->length & 3;
4433 if (qc->pad_len) {
4434 void *pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ);
4435 struct scatterlist *psg = &qc->pad_sgent;
4436
Tejun Heoa46314742006-02-11 19:11:13 +09004437 WARN_ON(qc->dev->class != ATA_DEV_ATAPI);
Jeff Garzikcedc9a42005-10-05 07:13:30 -04004438
4439 memset(pad_buf, 0, ATA_DMA_PAD_SZ);
4440
4441 if (qc->tf.flags & ATA_TFLAG_WRITE)
4442 memcpy(pad_buf, qc->buf_virt + sg->length - qc->pad_len,
4443 qc->pad_len);
4444
4445 sg_dma_address(psg) = ap->pad_dma + (qc->tag * ATA_DMA_PAD_SZ);
4446 sg_dma_len(psg) = ATA_DMA_PAD_SZ;
4447 /* trim sg */
4448 sg->length -= qc->pad_len;
Tejun Heo2e242fa2006-02-20 23:48:38 +09004449 if (sg->length == 0)
4450 trim_sg = 1;
Jeff Garzikcedc9a42005-10-05 07:13:30 -04004451
4452 DPRINTK("padding done, sg->length=%u pad_len=%u\n",
4453 sg->length, qc->pad_len);
4454 }
4455
Tejun Heo2e242fa2006-02-20 23:48:38 +09004456 if (trim_sg) {
4457 qc->n_elem--;
Jeff Garzike1410f22005-11-14 14:06:26 -05004458 goto skip_map;
4459 }
4460
Brian King2f1f6102006-03-23 17:30:15 -06004461 dma_address = dma_map_single(ap->dev, qc->buf_virt,
Albert Lee32529e02005-05-26 03:49:42 -04004462 sg->length, dir);
Tejun Heo537a95d2005-11-05 14:29:01 -05004463 if (dma_mapping_error(dma_address)) {
4464 /* restore sg */
4465 sg->length += qc->pad_len;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004466 return -1;
Tejun Heo537a95d2005-11-05 14:29:01 -05004467 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07004468
4469 sg_dma_address(sg) = dma_address;
Albert Lee32529e02005-05-26 03:49:42 -04004470 sg_dma_len(sg) = sg->length;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004471
Tejun Heo2e242fa2006-02-20 23:48:38 +09004472skip_map:
Linus Torvalds1da177e2005-04-16 15:20:36 -07004473 DPRINTK("mapped buffer of %d bytes for %s\n", sg_dma_len(sg),
4474 qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read");
4475
4476 return 0;
4477}
4478
4479/**
Jeff Garzik0cba6322005-05-30 19:49:12 -04004480 * ata_sg_setup - DMA-map the scatter-gather table associated with a command.
4481 * @qc: Command with scatter-gather table to be mapped.
4482 *
4483 * DMA-map the scatter-gather table associated with queued_cmd @qc.
Linus Torvalds1da177e2005-04-16 15:20:36 -07004484 *
4485 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04004486 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004487 *
4488 * RETURNS:
Jeff Garzik0cba6322005-05-30 19:49:12 -04004489 * Zero on success, negative on error.
Linus Torvalds1da177e2005-04-16 15:20:36 -07004490 *
4491 */
4492
4493static int ata_sg_setup(struct ata_queued_cmd *qc)
4494{
4495 struct ata_port *ap = qc->ap;
Jeff Garzikcedc9a42005-10-05 07:13:30 -04004496 struct scatterlist *sg = qc->__sg;
4497 struct scatterlist *lsg = &sg[qc->n_elem - 1];
Jeff Garzike1410f22005-11-14 14:06:26 -05004498 int n_elem, pre_n_elem, dir, trim_sg = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004499
Tejun Heo44877b42007-02-21 01:06:51 +09004500 VPRINTK("ENTER, ata%u\n", ap->print_id);
Tejun Heoa46314742006-02-11 19:11:13 +09004501 WARN_ON(!(qc->flags & ATA_QCFLAG_SG));
Linus Torvalds1da177e2005-04-16 15:20:36 -07004502
Jeff Garzikcedc9a42005-10-05 07:13:30 -04004503 /* we must lengthen transfers to end on a 32-bit boundary */
4504 qc->pad_len = lsg->length & 3;
4505 if (qc->pad_len) {
4506 void *pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ);
4507 struct scatterlist *psg = &qc->pad_sgent;
4508 unsigned int offset;
4509
Tejun Heoa46314742006-02-11 19:11:13 +09004510 WARN_ON(qc->dev->class != ATA_DEV_ATAPI);
Jeff Garzikcedc9a42005-10-05 07:13:30 -04004511
4512 memset(pad_buf, 0, ATA_DMA_PAD_SZ);
4513
4514 /*
4515 * psg->page/offset are used to copy to-be-written
4516 * data in this function or read data in ata_sg_clean.
4517 */
4518 offset = lsg->offset + lsg->length - qc->pad_len;
4519 psg->page = nth_page(lsg->page, offset >> PAGE_SHIFT);
4520 psg->offset = offset_in_page(offset);
4521
4522 if (qc->tf.flags & ATA_TFLAG_WRITE) {
4523 void *addr = kmap_atomic(psg->page, KM_IRQ0);
4524 memcpy(pad_buf, addr + psg->offset, qc->pad_len);
Mark Lorddfa15982005-12-12 23:19:28 -05004525 kunmap_atomic(addr, KM_IRQ0);
Jeff Garzikcedc9a42005-10-05 07:13:30 -04004526 }
4527
4528 sg_dma_address(psg) = ap->pad_dma + (qc->tag * ATA_DMA_PAD_SZ);
4529 sg_dma_len(psg) = ATA_DMA_PAD_SZ;
4530 /* trim last sg */
4531 lsg->length -= qc->pad_len;
Jeff Garzike1410f22005-11-14 14:06:26 -05004532 if (lsg->length == 0)
4533 trim_sg = 1;
Jeff Garzikcedc9a42005-10-05 07:13:30 -04004534
4535 DPRINTK("padding done, sg[%d].length=%u pad_len=%u\n",
4536 qc->n_elem - 1, lsg->length, qc->pad_len);
4537 }
4538
Jeff Garzike1410f22005-11-14 14:06:26 -05004539 pre_n_elem = qc->n_elem;
4540 if (trim_sg && pre_n_elem)
4541 pre_n_elem--;
4542
4543 if (!pre_n_elem) {
4544 n_elem = 0;
4545 goto skip_map;
4546 }
4547
Linus Torvalds1da177e2005-04-16 15:20:36 -07004548 dir = qc->dma_dir;
Brian King2f1f6102006-03-23 17:30:15 -06004549 n_elem = dma_map_sg(ap->dev, sg, pre_n_elem, dir);
Tejun Heo537a95d2005-11-05 14:29:01 -05004550 if (n_elem < 1) {
4551 /* restore last sg */
4552 lsg->length += qc->pad_len;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004553 return -1;
Tejun Heo537a95d2005-11-05 14:29:01 -05004554 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07004555
4556 DPRINTK("%d sg elements mapped\n", n_elem);
4557
Jeff Garzike1410f22005-11-14 14:06:26 -05004558skip_map:
Linus Torvalds1da177e2005-04-16 15:20:36 -07004559 qc->n_elem = n_elem;
4560
4561 return 0;
4562}
4563
4564/**
Randy Dunlapc893a3a2006-01-28 13:15:32 -05004565 * swap_buf_le16 - swap halves of 16-bit words in place
Edward Falk0baab862005-06-02 18:17:13 -04004566 * @buf: Buffer to swap
4567 * @buf_words: Number of 16-bit words in buffer.
4568 *
4569 * Swap halves of 16-bit words if needed to convert from
4570 * little-endian byte order to native cpu byte order, or
4571 * vice-versa.
4572 *
4573 * LOCKING:
Randy Dunlap6f0ef4f2005-10-25 01:44:30 -04004574 * Inherited from caller.
Edward Falk0baab862005-06-02 18:17:13 -04004575 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07004576void swap_buf_le16(u16 *buf, unsigned int buf_words)
4577{
4578#ifdef __BIG_ENDIAN
4579 unsigned int i;
4580
4581 for (i = 0; i < buf_words; i++)
4582 buf[i] = le16_to_cpu(buf[i]);
4583#endif /* __BIG_ENDIAN */
4584}
4585
Albert Lee6ae4cfb2005-08-12 14:15:34 +08004586/**
Tejun Heo0d5ff562007-02-01 15:06:36 +09004587 * ata_data_xfer - Transfer data by PIO
Alan Coxa6b2c5d2006-05-22 16:59:59 +01004588 * @adev: device to target
Albert Lee6ae4cfb2005-08-12 14:15:34 +08004589 * @buf: data buffer
4590 * @buflen: buffer length
Jeff Garzik344baba2005-09-07 01:15:17 -04004591 * @write_data: read/write
Albert Lee6ae4cfb2005-08-12 14:15:34 +08004592 *
4593 * Transfer data from/to the device data register by PIO.
4594 *
4595 * LOCKING:
4596 * Inherited from caller.
Albert Lee6ae4cfb2005-08-12 14:15:34 +08004597 */
Tejun Heo0d5ff562007-02-01 15:06:36 +09004598void ata_data_xfer(struct ata_device *adev, unsigned char *buf,
4599 unsigned int buflen, int write_data)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004600{
Tejun Heo9af5c9c2007-08-06 18:36:22 +09004601 struct ata_port *ap = adev->link->ap;
Albert Lee6ae4cfb2005-08-12 14:15:34 +08004602 unsigned int words = buflen >> 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004603
Albert Lee6ae4cfb2005-08-12 14:15:34 +08004604 /* Transfer multiple of 2 bytes */
Linus Torvalds1da177e2005-04-16 15:20:36 -07004605 if (write_data)
Tejun Heo0d5ff562007-02-01 15:06:36 +09004606 iowrite16_rep(ap->ioaddr.data_addr, buf, words);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004607 else
Tejun Heo0d5ff562007-02-01 15:06:36 +09004608 ioread16_rep(ap->ioaddr.data_addr, buf, words);
Albert Lee6ae4cfb2005-08-12 14:15:34 +08004609
4610 /* Transfer trailing 1 byte, if any. */
4611 if (unlikely(buflen & 0x01)) {
4612 u16 align_buf[1] = { 0 };
4613 unsigned char *trailing_buf = buf + buflen - 1;
4614
4615 if (write_data) {
4616 memcpy(align_buf, trailing_buf, 1);
Tejun Heo0d5ff562007-02-01 15:06:36 +09004617 iowrite16(le16_to_cpu(align_buf[0]), ap->ioaddr.data_addr);
Albert Lee6ae4cfb2005-08-12 14:15:34 +08004618 } else {
Tejun Heo0d5ff562007-02-01 15:06:36 +09004619 align_buf[0] = cpu_to_le16(ioread16(ap->ioaddr.data_addr));
Albert Lee6ae4cfb2005-08-12 14:15:34 +08004620 memcpy(trailing_buf, align_buf, 1);
4621 }
4622 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07004623}
4624
Albert Lee6ae4cfb2005-08-12 14:15:34 +08004625/**
Tejun Heo0d5ff562007-02-01 15:06:36 +09004626 * ata_data_xfer_noirq - Transfer data by PIO
Alan Cox75e99582006-05-24 14:14:41 +01004627 * @adev: device to target
4628 * @buf: data buffer
4629 * @buflen: buffer length
4630 * @write_data: read/write
4631 *
Tejun Heo88574552006-06-25 20:00:35 +09004632 * Transfer data from/to the device data register by PIO. Do the
Alan Cox75e99582006-05-24 14:14:41 +01004633 * transfer with interrupts disabled.
4634 *
4635 * LOCKING:
4636 * Inherited from caller.
4637 */
Tejun Heo0d5ff562007-02-01 15:06:36 +09004638void ata_data_xfer_noirq(struct ata_device *adev, unsigned char *buf,
4639 unsigned int buflen, int write_data)
Alan Cox75e99582006-05-24 14:14:41 +01004640{
4641 unsigned long flags;
4642 local_irq_save(flags);
Tejun Heo0d5ff562007-02-01 15:06:36 +09004643 ata_data_xfer(adev, buf, buflen, write_data);
Alan Cox75e99582006-05-24 14:14:41 +01004644 local_irq_restore(flags);
4645}
4646
4647
4648/**
Mark Lord5a5dbd12007-03-16 10:22:26 -04004649 * ata_pio_sector - Transfer a sector of data.
Albert Lee6ae4cfb2005-08-12 14:15:34 +08004650 * @qc: Command on going
4651 *
Mark Lord5a5dbd12007-03-16 10:22:26 -04004652 * Transfer qc->sect_size bytes of data from/to the ATA device.
Albert Lee6ae4cfb2005-08-12 14:15:34 +08004653 *
4654 * LOCKING:
4655 * Inherited from caller.
4656 */
4657
Linus Torvalds1da177e2005-04-16 15:20:36 -07004658static void ata_pio_sector(struct ata_queued_cmd *qc)
4659{
4660 int do_write = (qc->tf.flags & ATA_TFLAG_WRITE);
Jeff Garzikcedc9a42005-10-05 07:13:30 -04004661 struct scatterlist *sg = qc->__sg;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004662 struct ata_port *ap = qc->ap;
4663 struct page *page;
4664 unsigned int offset;
4665 unsigned char *buf;
4666
Mark Lord5a5dbd12007-03-16 10:22:26 -04004667 if (qc->curbytes == qc->nbytes - qc->sect_size)
Albert Lee14be71f2005-09-27 17:36:35 +08004668 ap->hsm_task_state = HSM_ST_LAST;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004669
4670 page = sg[qc->cursg].page;
Tejun Heo726f0782007-01-03 17:30:39 +09004671 offset = sg[qc->cursg].offset + qc->cursg_ofs;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004672
4673 /* get the current page and offset */
4674 page = nth_page(page, (offset >> PAGE_SHIFT));
4675 offset %= PAGE_SIZE;
4676
Albert Lee7282aa42005-10-09 09:46:07 -04004677 DPRINTK("data %s\n", qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read");
4678
Albert Lee91b8b312005-10-09 09:48:44 -04004679 if (PageHighMem(page)) {
4680 unsigned long flags;
Albert Lee7282aa42005-10-09 09:46:07 -04004681
Alan Coxa6b2c5d2006-05-22 16:59:59 +01004682 /* FIXME: use a bounce buffer */
Albert Lee91b8b312005-10-09 09:48:44 -04004683 local_irq_save(flags);
4684 buf = kmap_atomic(page, KM_IRQ0);
Albert Lee083958d2005-10-09 09:47:31 -04004685
Albert Lee91b8b312005-10-09 09:48:44 -04004686 /* do the actual data transfer */
Mark Lord5a5dbd12007-03-16 10:22:26 -04004687 ap->ops->data_xfer(qc->dev, buf + offset, qc->sect_size, do_write);
Albert Lee91b8b312005-10-09 09:48:44 -04004688
4689 kunmap_atomic(buf, KM_IRQ0);
4690 local_irq_restore(flags);
4691 } else {
4692 buf = page_address(page);
Mark Lord5a5dbd12007-03-16 10:22:26 -04004693 ap->ops->data_xfer(qc->dev, buf + offset, qc->sect_size, do_write);
Albert Lee91b8b312005-10-09 09:48:44 -04004694 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07004695
Mark Lord5a5dbd12007-03-16 10:22:26 -04004696 qc->curbytes += qc->sect_size;
4697 qc->cursg_ofs += qc->sect_size;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004698
Tejun Heo726f0782007-01-03 17:30:39 +09004699 if (qc->cursg_ofs == (&sg[qc->cursg])->length) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07004700 qc->cursg++;
4701 qc->cursg_ofs = 0;
4702 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07004703}
Linus Torvalds1da177e2005-04-16 15:20:36 -07004704
Albert Lee6ae4cfb2005-08-12 14:15:34 +08004705/**
Mark Lord5a5dbd12007-03-16 10:22:26 -04004706 * ata_pio_sectors - Transfer one or many sectors.
Albert Lee07f6f7d2005-11-01 19:33:20 +08004707 * @qc: Command on going
4708 *
Mark Lord5a5dbd12007-03-16 10:22:26 -04004709 * Transfer one or many sectors of data from/to the
Albert Lee07f6f7d2005-11-01 19:33:20 +08004710 * ATA device for the DRQ request.
4711 *
4712 * LOCKING:
4713 * Inherited from caller.
4714 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07004715
Albert Lee07f6f7d2005-11-01 19:33:20 +08004716static void ata_pio_sectors(struct ata_queued_cmd *qc)
4717{
4718 if (is_multi_taskfile(&qc->tf)) {
4719 /* READ/WRITE MULTIPLE */
4720 unsigned int nsect;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004721
Jeff Garzik587005d2006-02-11 18:17:32 -05004722 WARN_ON(qc->dev->multi_count == 0);
Albert Lee07f6f7d2005-11-01 19:33:20 +08004723
Mark Lord5a5dbd12007-03-16 10:22:26 -04004724 nsect = min((qc->nbytes - qc->curbytes) / qc->sect_size,
Tejun Heo726f0782007-01-03 17:30:39 +09004725 qc->dev->multi_count);
Albert Lee07f6f7d2005-11-01 19:33:20 +08004726 while (nsect--)
4727 ata_pio_sector(qc);
4728 } else
4729 ata_pio_sector(qc);
Albert Lee4cc980b2007-08-15 03:19:45 -04004730
4731 ata_altstatus(qc->ap); /* flush */
Albert Lee07f6f7d2005-11-01 19:33:20 +08004732}
4733
4734/**
Albert Leec71c1852005-10-04 06:03:45 -04004735 * atapi_send_cdb - Write CDB bytes to hardware
4736 * @ap: Port to which ATAPI device is attached.
4737 * @qc: Taskfile currently active
4738 *
4739 * When device has indicated its readiness to accept
4740 * a CDB, this function is called. Send the CDB.
4741 *
4742 * LOCKING:
4743 * caller.
4744 */
4745
4746static void atapi_send_cdb(struct ata_port *ap, struct ata_queued_cmd *qc)
4747{
4748 /* send SCSI cdb */
4749 DPRINTK("send cdb\n");
Jeff Garzikdb024d52006-02-13 00:23:57 -05004750 WARN_ON(qc->dev->cdb_len < 12);
Albert Leec71c1852005-10-04 06:03:45 -04004751
Alan Coxa6b2c5d2006-05-22 16:59:59 +01004752 ap->ops->data_xfer(qc->dev, qc->cdb, qc->dev->cdb_len, 1);
Albert Leec71c1852005-10-04 06:03:45 -04004753 ata_altstatus(ap); /* flush */
4754
4755 switch (qc->tf.protocol) {
4756 case ATA_PROT_ATAPI:
4757 ap->hsm_task_state = HSM_ST;
4758 break;
4759 case ATA_PROT_ATAPI_NODATA:
4760 ap->hsm_task_state = HSM_ST_LAST;
4761 break;
4762 case ATA_PROT_ATAPI_DMA:
4763 ap->hsm_task_state = HSM_ST_LAST;
4764 /* initiate bmdma */
4765 ap->ops->bmdma_start(qc);
4766 break;
4767 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07004768}
4769
Albert Lee6ae4cfb2005-08-12 14:15:34 +08004770/**
4771 * __atapi_pio_bytes - Transfer data from/to the ATAPI device.
4772 * @qc: Command on going
4773 * @bytes: number of bytes
4774 *
4775 * Transfer Transfer data from/to the ATAPI device.
4776 *
4777 * LOCKING:
4778 * Inherited from caller.
4779 *
4780 */
4781
Linus Torvalds1da177e2005-04-16 15:20:36 -07004782static void __atapi_pio_bytes(struct ata_queued_cmd *qc, unsigned int bytes)
4783{
4784 int do_write = (qc->tf.flags & ATA_TFLAG_WRITE);
Jeff Garzikcedc9a42005-10-05 07:13:30 -04004785 struct scatterlist *sg = qc->__sg;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004786 struct ata_port *ap = qc->ap;
4787 struct page *page;
4788 unsigned char *buf;
4789 unsigned int offset, count;
4790
Albert Lee563a6e12005-08-12 14:17:50 +08004791 if (qc->curbytes + bytes >= qc->nbytes)
Albert Lee14be71f2005-09-27 17:36:35 +08004792 ap->hsm_task_state = HSM_ST_LAST;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004793
4794next_sg:
Albert Lee563a6e12005-08-12 14:17:50 +08004795 if (unlikely(qc->cursg >= qc->n_elem)) {
Jeff Garzik7fb6ec22005-09-16 06:01:48 -04004796 /*
Albert Lee563a6e12005-08-12 14:17:50 +08004797 * The end of qc->sg is reached and the device expects
4798 * more data to transfer. In order not to overrun qc->sg
4799 * and fulfill length specified in the byte count register,
4800 * - for read case, discard trailing data from the device
4801 * - for write case, padding zero data to the device
4802 */
4803 u16 pad_buf[1] = { 0 };
4804 unsigned int words = bytes >> 1;
4805 unsigned int i;
4806
4807 if (words) /* warning if bytes > 1 */
Tejun Heof15a1da2006-05-15 20:57:56 +09004808 ata_dev_printk(qc->dev, KERN_WARNING,
4809 "%u bytes trailing data\n", bytes);
Albert Lee563a6e12005-08-12 14:17:50 +08004810
4811 for (i = 0; i < words; i++)
Alan Coxa6b2c5d2006-05-22 16:59:59 +01004812 ap->ops->data_xfer(qc->dev, (unsigned char*)pad_buf, 2, do_write);
Albert Lee563a6e12005-08-12 14:17:50 +08004813
Albert Lee14be71f2005-09-27 17:36:35 +08004814 ap->hsm_task_state = HSM_ST_LAST;
Albert Lee563a6e12005-08-12 14:17:50 +08004815 return;
4816 }
4817
Jeff Garzikcedc9a42005-10-05 07:13:30 -04004818 sg = &qc->__sg[qc->cursg];
Linus Torvalds1da177e2005-04-16 15:20:36 -07004819
Linus Torvalds1da177e2005-04-16 15:20:36 -07004820 page = sg->page;
4821 offset = sg->offset + qc->cursg_ofs;
4822
4823 /* get the current page and offset */
4824 page = nth_page(page, (offset >> PAGE_SHIFT));
4825 offset %= PAGE_SIZE;
4826
Albert Lee6952df02005-06-06 15:56:03 +08004827 /* don't overrun current sg */
Albert Lee32529e02005-05-26 03:49:42 -04004828 count = min(sg->length - qc->cursg_ofs, bytes);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004829
4830 /* don't cross page boundaries */
4831 count = min(count, (unsigned int)PAGE_SIZE - offset);
4832
Albert Lee7282aa42005-10-09 09:46:07 -04004833 DPRINTK("data %s\n", qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read");
4834
Albert Lee91b8b312005-10-09 09:48:44 -04004835 if (PageHighMem(page)) {
4836 unsigned long flags;
Albert Lee7282aa42005-10-09 09:46:07 -04004837
Alan Coxa6b2c5d2006-05-22 16:59:59 +01004838 /* FIXME: use bounce buffer */
Albert Lee91b8b312005-10-09 09:48:44 -04004839 local_irq_save(flags);
4840 buf = kmap_atomic(page, KM_IRQ0);
Albert Lee083958d2005-10-09 09:47:31 -04004841
Albert Lee91b8b312005-10-09 09:48:44 -04004842 /* do the actual data transfer */
Alan Coxa6b2c5d2006-05-22 16:59:59 +01004843 ap->ops->data_xfer(qc->dev, buf + offset, count, do_write);
Albert Lee91b8b312005-10-09 09:48:44 -04004844
4845 kunmap_atomic(buf, KM_IRQ0);
4846 local_irq_restore(flags);
4847 } else {
4848 buf = page_address(page);
Alan Coxa6b2c5d2006-05-22 16:59:59 +01004849 ap->ops->data_xfer(qc->dev, buf + offset, count, do_write);
Albert Lee91b8b312005-10-09 09:48:44 -04004850 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07004851
4852 bytes -= count;
4853 qc->curbytes += count;
4854 qc->cursg_ofs += count;
4855
Albert Lee32529e02005-05-26 03:49:42 -04004856 if (qc->cursg_ofs == sg->length) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07004857 qc->cursg++;
4858 qc->cursg_ofs = 0;
4859 }
4860
Albert Lee563a6e12005-08-12 14:17:50 +08004861 if (bytes)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004862 goto next_sg;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004863}
4864
Albert Lee6ae4cfb2005-08-12 14:15:34 +08004865/**
4866 * atapi_pio_bytes - Transfer data from/to the ATAPI device.
4867 * @qc: Command on going
4868 *
4869 * Transfer Transfer data from/to the ATAPI device.
4870 *
4871 * LOCKING:
4872 * Inherited from caller.
Albert Lee6ae4cfb2005-08-12 14:15:34 +08004873 */
4874
Linus Torvalds1da177e2005-04-16 15:20:36 -07004875static void atapi_pio_bytes(struct ata_queued_cmd *qc)
4876{
4877 struct ata_port *ap = qc->ap;
4878 struct ata_device *dev = qc->dev;
4879 unsigned int ireason, bc_lo, bc_hi, bytes;
4880 int i_write, do_write = (qc->tf.flags & ATA_TFLAG_WRITE) ? 1 : 0;
4881
Albert Leeeec4c3f2006-05-18 17:51:10 +08004882 /* Abuse qc->result_tf for temp storage of intermediate TF
4883 * here to save some kernel stack usage.
4884 * For normal completion, qc->result_tf is not relevant. For
4885 * error, qc->result_tf is later overwritten by ata_qc_complete().
4886 * So, the correctness of qc->result_tf is not affected.
4887 */
4888 ap->ops->tf_read(ap, &qc->result_tf);
4889 ireason = qc->result_tf.nsect;
4890 bc_lo = qc->result_tf.lbam;
4891 bc_hi = qc->result_tf.lbah;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004892 bytes = (bc_hi << 8) | bc_lo;
4893
4894 /* shall be cleared to zero, indicating xfer of data */
4895 if (ireason & (1 << 0))
4896 goto err_out;
4897
4898 /* make sure transfer direction matches expected */
4899 i_write = ((ireason & (1 << 1)) == 0) ? 1 : 0;
4900 if (do_write != i_write)
4901 goto err_out;
4902
Tejun Heo44877b42007-02-21 01:06:51 +09004903 VPRINTK("ata%u: xfering %d bytes\n", ap->print_id, bytes);
Albert Lee312f7da2005-09-27 17:38:03 +08004904
Linus Torvalds1da177e2005-04-16 15:20:36 -07004905 __atapi_pio_bytes(qc, bytes);
Albert Lee4cc980b2007-08-15 03:19:45 -04004906 ata_altstatus(ap); /* flush */
Linus Torvalds1da177e2005-04-16 15:20:36 -07004907
4908 return;
4909
4910err_out:
Tejun Heof15a1da2006-05-15 20:57:56 +09004911 ata_dev_printk(dev, KERN_INFO, "ATAPI check failed\n");
Tejun Heo11a56d22006-01-23 13:09:36 +09004912 qc->err_mask |= AC_ERR_HSM;
Albert Lee14be71f2005-09-27 17:36:35 +08004913 ap->hsm_task_state = HSM_ST_ERR;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004914}
4915
4916/**
Albert Leec234fb02006-03-25 17:58:38 +08004917 * ata_hsm_ok_in_wq - Check if the qc can be handled in the workqueue.
4918 * @ap: the target ata_port
4919 * @qc: qc on going
Linus Torvalds1da177e2005-04-16 15:20:36 -07004920 *
Albert Leec234fb02006-03-25 17:58:38 +08004921 * RETURNS:
4922 * 1 if ok in workqueue, 0 otherwise.
Linus Torvalds1da177e2005-04-16 15:20:36 -07004923 */
Albert Leec234fb02006-03-25 17:58:38 +08004924
4925static inline int ata_hsm_ok_in_wq(struct ata_port *ap, struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004926{
Albert Leec234fb02006-03-25 17:58:38 +08004927 if (qc->tf.flags & ATA_TFLAG_POLLING)
4928 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004929
Albert Leec234fb02006-03-25 17:58:38 +08004930 if (ap->hsm_task_state == HSM_ST_FIRST) {
4931 if (qc->tf.protocol == ATA_PROT_PIO &&
4932 (qc->tf.flags & ATA_TFLAG_WRITE))
4933 return 1;
4934
4935 if (is_atapi_taskfile(&qc->tf) &&
4936 !(qc->dev->flags & ATA_DFLAG_CDB_INTR))
4937 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004938 }
4939
Albert Leec234fb02006-03-25 17:58:38 +08004940 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004941}
4942
Albert Leec234fb02006-03-25 17:58:38 +08004943/**
Tejun Heoc17ea202006-05-15 20:59:29 +09004944 * ata_hsm_qc_complete - finish a qc running on standard HSM
4945 * @qc: Command to complete
4946 * @in_wq: 1 if called from workqueue, 0 otherwise
4947 *
4948 * Finish @qc which is running on standard HSM.
4949 *
4950 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04004951 * If @in_wq is zero, spin_lock_irqsave(host lock).
Tejun Heoc17ea202006-05-15 20:59:29 +09004952 * Otherwise, none on entry and grabs host lock.
4953 */
4954static void ata_hsm_qc_complete(struct ata_queued_cmd *qc, int in_wq)
4955{
4956 struct ata_port *ap = qc->ap;
4957 unsigned long flags;
4958
4959 if (ap->ops->error_handler) {
4960 if (in_wq) {
Jeff Garzikba6a1302006-06-22 23:46:10 -04004961 spin_lock_irqsave(ap->lock, flags);
Tejun Heoc17ea202006-05-15 20:59:29 +09004962
Jeff Garzikcca39742006-08-24 03:19:22 -04004963 /* EH might have kicked in while host lock is
4964 * released.
Tejun Heoc17ea202006-05-15 20:59:29 +09004965 */
4966 qc = ata_qc_from_tag(ap, qc->tag);
4967 if (qc) {
4968 if (likely(!(qc->err_mask & AC_ERR_HSM))) {
Akira Iguchi83625002007-01-26 16:27:32 +09004969 ap->ops->irq_on(ap);
Tejun Heoc17ea202006-05-15 20:59:29 +09004970 ata_qc_complete(qc);
4971 } else
4972 ata_port_freeze(ap);
4973 }
4974
Jeff Garzikba6a1302006-06-22 23:46:10 -04004975 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heoc17ea202006-05-15 20:59:29 +09004976 } else {
4977 if (likely(!(qc->err_mask & AC_ERR_HSM)))
4978 ata_qc_complete(qc);
4979 else
4980 ata_port_freeze(ap);
4981 }
4982 } else {
4983 if (in_wq) {
Jeff Garzikba6a1302006-06-22 23:46:10 -04004984 spin_lock_irqsave(ap->lock, flags);
Akira Iguchi83625002007-01-26 16:27:32 +09004985 ap->ops->irq_on(ap);
Tejun Heoc17ea202006-05-15 20:59:29 +09004986 ata_qc_complete(qc);
Jeff Garzikba6a1302006-06-22 23:46:10 -04004987 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heoc17ea202006-05-15 20:59:29 +09004988 } else
4989 ata_qc_complete(qc);
4990 }
4991}
4992
4993/**
Albert Leebb5cb292006-03-25 17:48:02 +08004994 * ata_hsm_move - move the HSM to the next state.
4995 * @ap: the target ata_port
4996 * @qc: qc on going
4997 * @status: current device status
4998 * @in_wq: 1 if called from workqueue, 0 otherwise
4999 *
5000 * RETURNS:
5001 * 1 when poll next status needed, 0 otherwise.
5002 */
Tejun Heo9a1004d2006-05-31 18:27:52 +09005003int ata_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc,
5004 u8 status, int in_wq)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005005{
Albert Leebb5cb292006-03-25 17:48:02 +08005006 unsigned long flags = 0;
5007 int poll_next;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005008
Albert Lee6912ccd2006-03-25 17:45:49 +08005009 WARN_ON((qc->flags & ATA_QCFLAG_ACTIVE) == 0);
Albert Lee0565c262006-02-13 18:55:25 +08005010
Albert Leebb5cb292006-03-25 17:48:02 +08005011 /* Make sure ata_qc_issue_prot() does not throw things
5012 * like DMA polling into the workqueue. Notice that
5013 * in_wq is not equivalent to (qc->tf.flags & ATA_TFLAG_POLLING).
Albert Lee1c848982005-12-05 15:40:15 +08005014 */
Albert Leec234fb02006-03-25 17:58:38 +08005015 WARN_ON(in_wq != ata_hsm_ok_in_wq(ap, qc));
Albert Lee1c848982005-12-05 15:40:15 +08005016
Albert Leee2cec772006-03-25 17:43:49 +08005017fsm_start:
Albert Lee999bb6f2006-03-25 18:07:48 +08005018 DPRINTK("ata%u: protocol %d task_state %d (dev_stat 0x%X)\n",
Tejun Heo44877b42007-02-21 01:06:51 +09005019 ap->print_id, qc->tf.protocol, ap->hsm_task_state, status);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005020
Albert Leee2cec772006-03-25 17:43:49 +08005021 switch (ap->hsm_task_state) {
5022 case HSM_ST_FIRST:
Albert Leebb5cb292006-03-25 17:48:02 +08005023 /* Send first data block or PACKET CDB */
5024
5025 /* If polling, we will stay in the work queue after
5026 * sending the data. Otherwise, interrupt handler
5027 * takes over after sending the data.
5028 */
5029 poll_next = (qc->tf.flags & ATA_TFLAG_POLLING);
5030
Albert Leee2cec772006-03-25 17:43:49 +08005031 /* check device status */
Albert Lee3655d1d2006-05-19 11:43:04 +08005032 if (unlikely((status & ATA_DRQ) == 0)) {
5033 /* handle BSY=0, DRQ=0 as error */
5034 if (likely(status & (ATA_ERR | ATA_DF)))
5035 /* device stops HSM for abort/error */
5036 qc->err_mask |= AC_ERR_DEV;
5037 else
5038 /* HSM violation. Let EH handle this */
5039 qc->err_mask |= AC_ERR_HSM;
5040
Albert Leee2cec772006-03-25 17:43:49 +08005041 ap->hsm_task_state = HSM_ST_ERR;
5042 goto fsm_start;
5043 }
5044
Albert Lee71601952006-03-25 18:11:12 +08005045 /* Device should not ask for data transfer (DRQ=1)
5046 * when it finds something wrong.
Albert Leeeee6c322006-04-01 17:38:43 +08005047 * We ignore DRQ here and stop the HSM by
5048 * changing hsm_task_state to HSM_ST_ERR and
5049 * let the EH abort the command or reset the device.
Albert Lee71601952006-03-25 18:11:12 +08005050 */
5051 if (unlikely(status & (ATA_ERR | ATA_DF))) {
Tejun Heo44877b42007-02-21 01:06:51 +09005052 ata_port_printk(ap, KERN_WARNING, "DRQ=1 with device "
5053 "error, dev_stat 0x%X\n", status);
Albert Lee3655d1d2006-05-19 11:43:04 +08005054 qc->err_mask |= AC_ERR_HSM;
Albert Leeeee6c322006-04-01 17:38:43 +08005055 ap->hsm_task_state = HSM_ST_ERR;
5056 goto fsm_start;
Albert Lee71601952006-03-25 18:11:12 +08005057 }
5058
Albert Leebb5cb292006-03-25 17:48:02 +08005059 /* Send the CDB (atapi) or the first data block (ata pio out).
5060 * During the state transition, interrupt handler shouldn't
5061 * be invoked before the data transfer is complete and
5062 * hsm_task_state is changed. Hence, the following locking.
5063 */
5064 if (in_wq)
Jeff Garzikba6a1302006-06-22 23:46:10 -04005065 spin_lock_irqsave(ap->lock, flags);
Albert Leee2cec772006-03-25 17:43:49 +08005066
Albert Leebb5cb292006-03-25 17:48:02 +08005067 if (qc->tf.protocol == ATA_PROT_PIO) {
5068 /* PIO data out protocol.
5069 * send first data block.
5070 */
5071
5072 /* ata_pio_sectors() might change the state
5073 * to HSM_ST_LAST. so, the state is changed here
5074 * before ata_pio_sectors().
5075 */
5076 ap->hsm_task_state = HSM_ST;
5077 ata_pio_sectors(qc);
Albert Leebb5cb292006-03-25 17:48:02 +08005078 } else
5079 /* send CDB */
5080 atapi_send_cdb(ap, qc);
5081
5082 if (in_wq)
Jeff Garzikba6a1302006-06-22 23:46:10 -04005083 spin_unlock_irqrestore(ap->lock, flags);
Albert Leebb5cb292006-03-25 17:48:02 +08005084
5085 /* if polling, ata_pio_task() handles the rest.
5086 * otherwise, interrupt handler takes over from here.
5087 */
Albert Leee2cec772006-03-25 17:43:49 +08005088 break;
5089
5090 case HSM_ST:
5091 /* complete command or read/write the data register */
5092 if (qc->tf.protocol == ATA_PROT_ATAPI) {
5093 /* ATAPI PIO protocol */
5094 if ((status & ATA_DRQ) == 0) {
Albert Lee3655d1d2006-05-19 11:43:04 +08005095 /* No more data to transfer or device error.
5096 * Device error will be tagged in HSM_ST_LAST.
5097 */
Albert Leee2cec772006-03-25 17:43:49 +08005098 ap->hsm_task_state = HSM_ST_LAST;
5099 goto fsm_start;
5100 }
5101
Albert Lee71601952006-03-25 18:11:12 +08005102 /* Device should not ask for data transfer (DRQ=1)
5103 * when it finds something wrong.
Albert Leeeee6c322006-04-01 17:38:43 +08005104 * We ignore DRQ here and stop the HSM by
5105 * changing hsm_task_state to HSM_ST_ERR and
5106 * let the EH abort the command or reset the device.
Albert Lee71601952006-03-25 18:11:12 +08005107 */
5108 if (unlikely(status & (ATA_ERR | ATA_DF))) {
Tejun Heo44877b42007-02-21 01:06:51 +09005109 ata_port_printk(ap, KERN_WARNING, "DRQ=1 with "
5110 "device error, dev_stat 0x%X\n",
5111 status);
Albert Lee3655d1d2006-05-19 11:43:04 +08005112 qc->err_mask |= AC_ERR_HSM;
Albert Leeeee6c322006-04-01 17:38:43 +08005113 ap->hsm_task_state = HSM_ST_ERR;
5114 goto fsm_start;
Albert Lee71601952006-03-25 18:11:12 +08005115 }
5116
Albert Leee2cec772006-03-25 17:43:49 +08005117 atapi_pio_bytes(qc);
5118
5119 if (unlikely(ap->hsm_task_state == HSM_ST_ERR))
5120 /* bad ireason reported by device */
5121 goto fsm_start;
5122
5123 } else {
5124 /* ATA PIO protocol */
5125 if (unlikely((status & ATA_DRQ) == 0)) {
5126 /* handle BSY=0, DRQ=0 as error */
Albert Lee3655d1d2006-05-19 11:43:04 +08005127 if (likely(status & (ATA_ERR | ATA_DF)))
5128 /* device stops HSM for abort/error */
5129 qc->err_mask |= AC_ERR_DEV;
5130 else
Tejun Heo55a8e2c2006-11-10 18:08:10 +09005131 /* HSM violation. Let EH handle this.
5132 * Phantom devices also trigger this
5133 * condition. Mark hint.
5134 */
5135 qc->err_mask |= AC_ERR_HSM |
5136 AC_ERR_NODEV_HINT;
Albert Lee3655d1d2006-05-19 11:43:04 +08005137
Albert Leee2cec772006-03-25 17:43:49 +08005138 ap->hsm_task_state = HSM_ST_ERR;
5139 goto fsm_start;
5140 }
5141
Albert Leeeee6c322006-04-01 17:38:43 +08005142 /* For PIO reads, some devices may ask for
5143 * data transfer (DRQ=1) alone with ERR=1.
5144 * We respect DRQ here and transfer one
5145 * block of junk data before changing the
5146 * hsm_task_state to HSM_ST_ERR.
5147 *
5148 * For PIO writes, ERR=1 DRQ=1 doesn't make
5149 * sense since the data block has been
5150 * transferred to the device.
Albert Lee71601952006-03-25 18:11:12 +08005151 */
5152 if (unlikely(status & (ATA_ERR | ATA_DF))) {
Albert Lee71601952006-03-25 18:11:12 +08005153 /* data might be corrputed */
5154 qc->err_mask |= AC_ERR_DEV;
Albert Leeeee6c322006-04-01 17:38:43 +08005155
5156 if (!(qc->tf.flags & ATA_TFLAG_WRITE)) {
5157 ata_pio_sectors(qc);
Albert Leeeee6c322006-04-01 17:38:43 +08005158 status = ata_wait_idle(ap);
5159 }
5160
Albert Lee3655d1d2006-05-19 11:43:04 +08005161 if (status & (ATA_BUSY | ATA_DRQ))
5162 qc->err_mask |= AC_ERR_HSM;
5163
Albert Leeeee6c322006-04-01 17:38:43 +08005164 /* ata_pio_sectors() might change the
5165 * state to HSM_ST_LAST. so, the state
5166 * is changed after ata_pio_sectors().
5167 */
5168 ap->hsm_task_state = HSM_ST_ERR;
5169 goto fsm_start;
Albert Lee71601952006-03-25 18:11:12 +08005170 }
5171
Albert Leee2cec772006-03-25 17:43:49 +08005172 ata_pio_sectors(qc);
5173
5174 if (ap->hsm_task_state == HSM_ST_LAST &&
5175 (!(qc->tf.flags & ATA_TFLAG_WRITE))) {
5176 /* all data read */
Albert Lee52a32202006-03-25 18:18:15 +08005177 status = ata_wait_idle(ap);
Albert Leee2cec772006-03-25 17:43:49 +08005178 goto fsm_start;
5179 }
5180 }
5181
Albert Leebb5cb292006-03-25 17:48:02 +08005182 poll_next = 1;
Albert Leee2cec772006-03-25 17:43:49 +08005183 break;
5184
5185 case HSM_ST_LAST:
Albert Lee6912ccd2006-03-25 17:45:49 +08005186 if (unlikely(!ata_ok(status))) {
5187 qc->err_mask |= __ac_err_mask(status);
Albert Leee2cec772006-03-25 17:43:49 +08005188 ap->hsm_task_state = HSM_ST_ERR;
5189 goto fsm_start;
5190 }
5191
5192 /* no more data to transfer */
Albert Lee4332a772006-04-03 17:43:24 +08005193 DPRINTK("ata%u: dev %u command complete, drv_stat 0x%x\n",
Tejun Heo44877b42007-02-21 01:06:51 +09005194 ap->print_id, qc->dev->devno, status);
Albert Leee2cec772006-03-25 17:43:49 +08005195
Albert Lee6912ccd2006-03-25 17:45:49 +08005196 WARN_ON(qc->err_mask);
5197
Albert Leee2cec772006-03-25 17:43:49 +08005198 ap->hsm_task_state = HSM_ST_IDLE;
5199
5200 /* complete taskfile transaction */
Tejun Heoc17ea202006-05-15 20:59:29 +09005201 ata_hsm_qc_complete(qc, in_wq);
Albert Leebb5cb292006-03-25 17:48:02 +08005202
5203 poll_next = 0;
Albert Leee2cec772006-03-25 17:43:49 +08005204 break;
5205
5206 case HSM_ST_ERR:
Albert Leee2cec772006-03-25 17:43:49 +08005207 /* make sure qc->err_mask is available to
5208 * know what's wrong and recover
5209 */
5210 WARN_ON(qc->err_mask == 0);
5211
5212 ap->hsm_task_state = HSM_ST_IDLE;
Albert Leebb5cb292006-03-25 17:48:02 +08005213
Albert Lee999bb6f2006-03-25 18:07:48 +08005214 /* complete taskfile transaction */
Tejun Heoc17ea202006-05-15 20:59:29 +09005215 ata_hsm_qc_complete(qc, in_wq);
Albert Leebb5cb292006-03-25 17:48:02 +08005216
5217 poll_next = 0;
Albert Leee2cec772006-03-25 17:43:49 +08005218 break;
5219 default:
Albert Leebb5cb292006-03-25 17:48:02 +08005220 poll_next = 0;
Albert Lee6912ccd2006-03-25 17:45:49 +08005221 BUG();
Albert Leee2cec772006-03-25 17:43:49 +08005222 }
5223
Albert Leebb5cb292006-03-25 17:48:02 +08005224 return poll_next;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005225}
5226
David Howells65f27f32006-11-22 14:55:48 +00005227static void ata_pio_task(struct work_struct *work)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005228{
David Howells65f27f32006-11-22 14:55:48 +00005229 struct ata_port *ap =
5230 container_of(work, struct ata_port, port_task.work);
5231 struct ata_queued_cmd *qc = ap->port_task_data;
Albert Leea1af3732006-03-25 17:50:15 +08005232 u8 status;
5233 int poll_next;
Jeff Garzik7fb6ec22005-09-16 06:01:48 -04005234
5235fsm_start:
Albert Leea1af3732006-03-25 17:50:15 +08005236 WARN_ON(ap->hsm_task_state == HSM_ST_IDLE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005237
Albert Leea1af3732006-03-25 17:50:15 +08005238 /*
5239 * This is purely heuristic. This is a fast path.
5240 * Sometimes when we enter, BSY will be cleared in
5241 * a chk-status or two. If not, the drive is probably seeking
5242 * or something. Snooze for a couple msecs, then
5243 * chk-status again. If still busy, queue delayed work.
5244 */
5245 status = ata_busy_wait(ap, ATA_BUSY, 5);
5246 if (status & ATA_BUSY) {
5247 msleep(2);
5248 status = ata_busy_wait(ap, ATA_BUSY, 10);
5249 if (status & ATA_BUSY) {
Albert Lee31ce6da2006-04-03 18:31:44 +08005250 ata_port_queue_task(ap, ata_pio_task, qc, ATA_SHORT_PAUSE);
Albert Leea1af3732006-03-25 17:50:15 +08005251 return;
5252 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07005253 }
5254
Albert Leea1af3732006-03-25 17:50:15 +08005255 /* move the HSM */
5256 poll_next = ata_hsm_move(ap, qc, status, 1);
5257
5258 /* another command or interrupt handler
5259 * may be running at this point.
5260 */
5261 if (poll_next)
Jeff Garzik7fb6ec22005-09-16 06:01:48 -04005262 goto fsm_start;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005263}
5264
Linus Torvalds1da177e2005-04-16 15:20:36 -07005265/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07005266 * ata_qc_new - Request an available ATA command, for queueing
5267 * @ap: Port associated with device @dev
5268 * @dev: Device from whom we request an available command structure
5269 *
5270 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04005271 * None.
Linus Torvalds1da177e2005-04-16 15:20:36 -07005272 */
5273
5274static struct ata_queued_cmd *ata_qc_new(struct ata_port *ap)
5275{
5276 struct ata_queued_cmd *qc = NULL;
5277 unsigned int i;
5278
Tejun Heoe3180492006-05-15 20:58:09 +09005279 /* no command while frozen */
Tejun Heob51e9e52006-06-29 01:29:30 +09005280 if (unlikely(ap->pflags & ATA_PFLAG_FROZEN))
Tejun Heoe3180492006-05-15 20:58:09 +09005281 return NULL;
5282
Tejun Heo2ab7db12006-05-15 20:58:02 +09005283 /* the last tag is reserved for internal command. */
5284 for (i = 0; i < ATA_MAX_QUEUE - 1; i++)
Tejun Heo6cec4a32006-05-15 21:03:41 +09005285 if (!test_and_set_bit(i, &ap->qc_allocated)) {
Tejun Heof69499f2006-05-15 20:58:03 +09005286 qc = __ata_qc_from_tag(ap, i);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005287 break;
5288 }
5289
5290 if (qc)
5291 qc->tag = i;
5292
5293 return qc;
5294}
5295
5296/**
5297 * ata_qc_new_init - Request an available ATA command, and initialize it
Linus Torvalds1da177e2005-04-16 15:20:36 -07005298 * @dev: Device from whom we request an available command structure
5299 *
5300 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04005301 * None.
Linus Torvalds1da177e2005-04-16 15:20:36 -07005302 */
5303
Tejun Heo3373efd2006-05-15 20:57:53 +09005304struct ata_queued_cmd *ata_qc_new_init(struct ata_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005305{
Tejun Heo9af5c9c2007-08-06 18:36:22 +09005306 struct ata_port *ap = dev->link->ap;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005307 struct ata_queued_cmd *qc;
5308
5309 qc = ata_qc_new(ap);
5310 if (qc) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07005311 qc->scsicmd = NULL;
5312 qc->ap = ap;
5313 qc->dev = dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005314
Jeff Garzik2c13b7c2005-11-14 14:14:16 -05005315 ata_qc_reinit(qc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005316 }
5317
5318 return qc;
5319}
5320
Linus Torvalds1da177e2005-04-16 15:20:36 -07005321/**
5322 * ata_qc_free - free unused ata_queued_cmd
5323 * @qc: Command to complete
5324 *
5325 * Designed to free unused ata_queued_cmd object
5326 * in case something prevents using it.
5327 *
5328 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04005329 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005330 */
5331void ata_qc_free(struct ata_queued_cmd *qc)
5332{
Tejun Heo4ba946e2006-01-23 13:09:36 +09005333 struct ata_port *ap = qc->ap;
5334 unsigned int tag;
5335
Tejun Heoa46314742006-02-11 19:11:13 +09005336 WARN_ON(qc == NULL); /* ata_qc_from_tag _might_ return NULL */
Linus Torvalds1da177e2005-04-16 15:20:36 -07005337
Tejun Heo4ba946e2006-01-23 13:09:36 +09005338 qc->flags = 0;
5339 tag = qc->tag;
5340 if (likely(ata_tag_valid(tag))) {
Tejun Heo4ba946e2006-01-23 13:09:36 +09005341 qc->tag = ATA_TAG_POISON;
Tejun Heo6cec4a32006-05-15 21:03:41 +09005342 clear_bit(tag, &ap->qc_allocated);
Tejun Heo4ba946e2006-01-23 13:09:36 +09005343 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07005344}
5345
Tejun Heo76014422006-02-11 15:13:49 +09005346void __ata_qc_complete(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005347{
Tejun Heodedaf2b2006-05-15 21:03:43 +09005348 struct ata_port *ap = qc->ap;
Tejun Heo9af5c9c2007-08-06 18:36:22 +09005349 struct ata_link *link = qc->dev->link;
Tejun Heodedaf2b2006-05-15 21:03:43 +09005350
Tejun Heoa46314742006-02-11 19:11:13 +09005351 WARN_ON(qc == NULL); /* ata_qc_from_tag _might_ return NULL */
5352 WARN_ON(!(qc->flags & ATA_QCFLAG_ACTIVE));
Linus Torvalds1da177e2005-04-16 15:20:36 -07005353
5354 if (likely(qc->flags & ATA_QCFLAG_DMAMAP))
5355 ata_sg_clean(qc);
5356
Tejun Heo7401abf2006-05-15 20:57:32 +09005357 /* command should be marked inactive atomically with qc completion */
Tejun Heodedaf2b2006-05-15 21:03:43 +09005358 if (qc->tf.protocol == ATA_PROT_NCQ)
Tejun Heo9af5c9c2007-08-06 18:36:22 +09005359 link->sactive &= ~(1 << qc->tag);
Tejun Heodedaf2b2006-05-15 21:03:43 +09005360 else
Tejun Heo9af5c9c2007-08-06 18:36:22 +09005361 link->active_tag = ATA_TAG_POISON;
Tejun Heo7401abf2006-05-15 20:57:32 +09005362
Albert Lee3f3791d2005-08-16 14:25:38 +08005363 /* atapi: mark qc as inactive to prevent the interrupt handler
5364 * from completing the command twice later, before the error handler
5365 * is called. (when rc != 0 and atapi request sense is needed)
5366 */
5367 qc->flags &= ~ATA_QCFLAG_ACTIVE;
Tejun Heodedaf2b2006-05-15 21:03:43 +09005368 ap->qc_active &= ~(1 << qc->tag);
Albert Lee3f3791d2005-08-16 14:25:38 +08005369
Linus Torvalds1da177e2005-04-16 15:20:36 -07005370 /* call completion callback */
Tejun Heo77853bf2006-01-23 13:09:36 +09005371 qc->complete_fn(qc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005372}
5373
Tejun Heo39599a52006-11-14 22:37:35 +09005374static void fill_result_tf(struct ata_queued_cmd *qc)
5375{
5376 struct ata_port *ap = qc->ap;
5377
Tejun Heo39599a52006-11-14 22:37:35 +09005378 qc->result_tf.flags = qc->tf.flags;
Mark Lord4742d542007-04-02 16:20:35 -04005379 ap->ops->tf_read(ap, &qc->result_tf);
Tejun Heo39599a52006-11-14 22:37:35 +09005380}
5381
Tejun Heof686bcb2006-05-15 20:58:05 +09005382/**
5383 * ata_qc_complete - Complete an active ATA command
5384 * @qc: Command to complete
5385 * @err_mask: ATA Status register contents
5386 *
5387 * Indicate to the mid and upper layers that an ATA
5388 * command has completed, with either an ok or not-ok status.
5389 *
5390 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04005391 * spin_lock_irqsave(host lock)
Tejun Heof686bcb2006-05-15 20:58:05 +09005392 */
5393void ata_qc_complete(struct ata_queued_cmd *qc)
5394{
5395 struct ata_port *ap = qc->ap;
5396
5397 /* XXX: New EH and old EH use different mechanisms to
5398 * synchronize EH with regular execution path.
5399 *
5400 * In new EH, a failed qc is marked with ATA_QCFLAG_FAILED.
5401 * Normal execution path is responsible for not accessing a
5402 * failed qc. libata core enforces the rule by returning NULL
5403 * from ata_qc_from_tag() for failed qcs.
5404 *
5405 * Old EH depends on ata_qc_complete() nullifying completion
5406 * requests if ATA_QCFLAG_EH_SCHEDULED is set. Old EH does
5407 * not synchronize with interrupt handler. Only PIO task is
5408 * taken care of.
5409 */
5410 if (ap->ops->error_handler) {
Tejun Heob51e9e52006-06-29 01:29:30 +09005411 WARN_ON(ap->pflags & ATA_PFLAG_FROZEN);
Tejun Heof686bcb2006-05-15 20:58:05 +09005412
5413 if (unlikely(qc->err_mask))
5414 qc->flags |= ATA_QCFLAG_FAILED;
5415
5416 if (unlikely(qc->flags & ATA_QCFLAG_FAILED)) {
5417 if (!ata_tag_internal(qc->tag)) {
5418 /* always fill result TF for failed qc */
Tejun Heo39599a52006-11-14 22:37:35 +09005419 fill_result_tf(qc);
Tejun Heof686bcb2006-05-15 20:58:05 +09005420 ata_qc_schedule_eh(qc);
5421 return;
5422 }
5423 }
5424
5425 /* read result TF if requested */
5426 if (qc->flags & ATA_QCFLAG_RESULT_TF)
Tejun Heo39599a52006-11-14 22:37:35 +09005427 fill_result_tf(qc);
Tejun Heof686bcb2006-05-15 20:58:05 +09005428
5429 __ata_qc_complete(qc);
5430 } else {
5431 if (qc->flags & ATA_QCFLAG_EH_SCHEDULED)
5432 return;
5433
5434 /* read result TF if failed or requested */
5435 if (qc->err_mask || qc->flags & ATA_QCFLAG_RESULT_TF)
Tejun Heo39599a52006-11-14 22:37:35 +09005436 fill_result_tf(qc);
Tejun Heof686bcb2006-05-15 20:58:05 +09005437
5438 __ata_qc_complete(qc);
5439 }
5440}
5441
Tejun Heodedaf2b2006-05-15 21:03:43 +09005442/**
5443 * ata_qc_complete_multiple - Complete multiple qcs successfully
5444 * @ap: port in question
5445 * @qc_active: new qc_active mask
5446 * @finish_qc: LLDD callback invoked before completing a qc
5447 *
5448 * Complete in-flight commands. This functions is meant to be
5449 * called from low-level driver's interrupt routine to complete
5450 * requests normally. ap->qc_active and @qc_active is compared
5451 * and commands are completed accordingly.
5452 *
5453 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04005454 * spin_lock_irqsave(host lock)
Tejun Heodedaf2b2006-05-15 21:03:43 +09005455 *
5456 * RETURNS:
5457 * Number of completed commands on success, -errno otherwise.
5458 */
5459int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active,
5460 void (*finish_qc)(struct ata_queued_cmd *))
5461{
5462 int nr_done = 0;
5463 u32 done_mask;
5464 int i;
5465
5466 done_mask = ap->qc_active ^ qc_active;
5467
5468 if (unlikely(done_mask & qc_active)) {
5469 ata_port_printk(ap, KERN_ERR, "illegal qc_active transition "
5470 "(%08x->%08x)\n", ap->qc_active, qc_active);
5471 return -EINVAL;
5472 }
5473
5474 for (i = 0; i < ATA_MAX_QUEUE; i++) {
5475 struct ata_queued_cmd *qc;
5476
5477 if (!(done_mask & (1 << i)))
5478 continue;
5479
5480 if ((qc = ata_qc_from_tag(ap, i))) {
5481 if (finish_qc)
5482 finish_qc(qc);
5483 ata_qc_complete(qc);
5484 nr_done++;
5485 }
5486 }
5487
5488 return nr_done;
5489}
5490
Linus Torvalds1da177e2005-04-16 15:20:36 -07005491static inline int ata_should_dma_map(struct ata_queued_cmd *qc)
5492{
5493 struct ata_port *ap = qc->ap;
5494
5495 switch (qc->tf.protocol) {
Tejun Heo3dc1d882006-05-15 21:03:45 +09005496 case ATA_PROT_NCQ:
Linus Torvalds1da177e2005-04-16 15:20:36 -07005497 case ATA_PROT_DMA:
5498 case ATA_PROT_ATAPI_DMA:
5499 return 1;
5500
5501 case ATA_PROT_ATAPI:
5502 case ATA_PROT_PIO:
Linus Torvalds1da177e2005-04-16 15:20:36 -07005503 if (ap->flags & ATA_FLAG_PIO_DMA)
5504 return 1;
5505
5506 /* fall through */
5507
5508 default:
5509 return 0;
5510 }
5511
5512 /* never reached */
5513}
5514
5515/**
5516 * ata_qc_issue - issue taskfile to device
5517 * @qc: command to issue to device
5518 *
5519 * Prepare an ATA command to submission to device.
5520 * This includes mapping the data into a DMA-able
5521 * area, filling in the S/G table, and finally
5522 * writing the taskfile to hardware, starting the command.
5523 *
5524 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04005525 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005526 */
Tejun Heo8e0e6942006-03-31 20:41:11 +09005527void ata_qc_issue(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005528{
5529 struct ata_port *ap = qc->ap;
Tejun Heo9af5c9c2007-08-06 18:36:22 +09005530 struct ata_link *link = qc->dev->link;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005531
Tejun Heodedaf2b2006-05-15 21:03:43 +09005532 /* Make sure only one non-NCQ command is outstanding. The
5533 * check is skipped for old EH because it reuses active qc to
5534 * request ATAPI sense.
5535 */
Tejun Heo9af5c9c2007-08-06 18:36:22 +09005536 WARN_ON(ap->ops->error_handler && ata_tag_valid(link->active_tag));
Tejun Heodedaf2b2006-05-15 21:03:43 +09005537
5538 if (qc->tf.protocol == ATA_PROT_NCQ) {
Tejun Heo9af5c9c2007-08-06 18:36:22 +09005539 WARN_ON(link->sactive & (1 << qc->tag));
5540 link->sactive |= 1 << qc->tag;
Tejun Heodedaf2b2006-05-15 21:03:43 +09005541 } else {
Tejun Heo9af5c9c2007-08-06 18:36:22 +09005542 WARN_ON(link->sactive);
5543 link->active_tag = qc->tag;
Tejun Heodedaf2b2006-05-15 21:03:43 +09005544 }
5545
Tejun Heoe4a70e72006-03-31 20:36:47 +09005546 qc->flags |= ATA_QCFLAG_ACTIVE;
Tejun Heodedaf2b2006-05-15 21:03:43 +09005547 ap->qc_active |= 1 << qc->tag;
Tejun Heoe4a70e72006-03-31 20:36:47 +09005548
Linus Torvalds1da177e2005-04-16 15:20:36 -07005549 if (ata_should_dma_map(qc)) {
5550 if (qc->flags & ATA_QCFLAG_SG) {
5551 if (ata_sg_setup(qc))
Tejun Heo8e436af2006-01-23 13:09:36 +09005552 goto sg_err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005553 } else if (qc->flags & ATA_QCFLAG_SINGLE) {
5554 if (ata_sg_setup_one(qc))
Tejun Heo8e436af2006-01-23 13:09:36 +09005555 goto sg_err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005556 }
5557 } else {
5558 qc->flags &= ~ATA_QCFLAG_DMAMAP;
5559 }
5560
5561 ap->ops->qc_prep(qc);
5562
Tejun Heo8e0e6942006-03-31 20:41:11 +09005563 qc->err_mask |= ap->ops->qc_issue(qc);
5564 if (unlikely(qc->err_mask))
5565 goto err;
5566 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005567
Tejun Heo8e436af2006-01-23 13:09:36 +09005568sg_err:
5569 qc->flags &= ~ATA_QCFLAG_DMAMAP;
Tejun Heo8e0e6942006-03-31 20:41:11 +09005570 qc->err_mask |= AC_ERR_SYSTEM;
5571err:
5572 ata_qc_complete(qc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005573}
5574
5575/**
5576 * ata_qc_issue_prot - issue taskfile to device in proto-dependent manner
5577 * @qc: command to issue to device
5578 *
5579 * Using various libata functions and hooks, this function
5580 * starts an ATA command. ATA commands are grouped into
5581 * classes called "protocols", and issuing each type of protocol
5582 * is slightly different.
5583 *
Edward Falk0baab862005-06-02 18:17:13 -04005584 * May be used as the qc_issue() entry in ata_port_operations.
5585 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07005586 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04005587 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005588 *
5589 * RETURNS:
Tejun Heo9a3d9eb2006-01-23 13:09:36 +09005590 * Zero on success, AC_ERR_* mask on failure
Linus Torvalds1da177e2005-04-16 15:20:36 -07005591 */
5592
Tejun Heo9a3d9eb2006-01-23 13:09:36 +09005593unsigned int ata_qc_issue_prot(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005594{
5595 struct ata_port *ap = qc->ap;
5596
Albert Leee50362e2005-09-27 17:39:50 +08005597 /* Use polling pio if the LLD doesn't handle
5598 * interrupt driven pio and atapi CDB interrupt.
5599 */
5600 if (ap->flags & ATA_FLAG_PIO_POLLING) {
5601 switch (qc->tf.protocol) {
5602 case ATA_PROT_PIO:
Albert Leee3472cb2006-12-07 11:37:58 +08005603 case ATA_PROT_NODATA:
Albert Leee50362e2005-09-27 17:39:50 +08005604 case ATA_PROT_ATAPI:
5605 case ATA_PROT_ATAPI_NODATA:
5606 qc->tf.flags |= ATA_TFLAG_POLLING;
5607 break;
5608 case ATA_PROT_ATAPI_DMA:
5609 if (qc->dev->flags & ATA_DFLAG_CDB_INTR)
Albert Lee3a778272006-06-22 13:00:25 +08005610 /* see ata_dma_blacklisted() */
Albert Leee50362e2005-09-27 17:39:50 +08005611 BUG();
5612 break;
5613 default:
5614 break;
5615 }
5616 }
5617
Albert Lee312f7da2005-09-27 17:38:03 +08005618 /* select the device */
Linus Torvalds1da177e2005-04-16 15:20:36 -07005619 ata_dev_select(ap, qc->dev->devno, 1, 0);
5620
Albert Lee312f7da2005-09-27 17:38:03 +08005621 /* start the command */
Linus Torvalds1da177e2005-04-16 15:20:36 -07005622 switch (qc->tf.protocol) {
5623 case ATA_PROT_NODATA:
Albert Lee312f7da2005-09-27 17:38:03 +08005624 if (qc->tf.flags & ATA_TFLAG_POLLING)
5625 ata_qc_set_polling(qc);
5626
Jeff Garzike5338252005-10-30 21:37:17 -05005627 ata_tf_to_host(ap, &qc->tf);
Albert Lee312f7da2005-09-27 17:38:03 +08005628 ap->hsm_task_state = HSM_ST_LAST;
5629
5630 if (qc->tf.flags & ATA_TFLAG_POLLING)
Albert Lee31ce6da2006-04-03 18:31:44 +08005631 ata_port_queue_task(ap, ata_pio_task, qc, 0);
Albert Lee312f7da2005-09-27 17:38:03 +08005632
Linus Torvalds1da177e2005-04-16 15:20:36 -07005633 break;
5634
5635 case ATA_PROT_DMA:
Jeff Garzik587005d2006-02-11 18:17:32 -05005636 WARN_ON(qc->tf.flags & ATA_TFLAG_POLLING);
Albert Lee312f7da2005-09-27 17:38:03 +08005637
Linus Torvalds1da177e2005-04-16 15:20:36 -07005638 ap->ops->tf_load(ap, &qc->tf); /* load tf registers */
5639 ap->ops->bmdma_setup(qc); /* set up bmdma */
5640 ap->ops->bmdma_start(qc); /* initiate bmdma */
Albert Lee312f7da2005-09-27 17:38:03 +08005641 ap->hsm_task_state = HSM_ST_LAST;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005642 break;
5643
Albert Lee312f7da2005-09-27 17:38:03 +08005644 case ATA_PROT_PIO:
5645 if (qc->tf.flags & ATA_TFLAG_POLLING)
5646 ata_qc_set_polling(qc);
5647
Jeff Garzike5338252005-10-30 21:37:17 -05005648 ata_tf_to_host(ap, &qc->tf);
Albert Lee312f7da2005-09-27 17:38:03 +08005649
Albert Lee54f00382005-09-30 19:14:19 +08005650 if (qc->tf.flags & ATA_TFLAG_WRITE) {
5651 /* PIO data out protocol */
5652 ap->hsm_task_state = HSM_ST_FIRST;
Albert Lee31ce6da2006-04-03 18:31:44 +08005653 ata_port_queue_task(ap, ata_pio_task, qc, 0);
Albert Lee54f00382005-09-30 19:14:19 +08005654
5655 /* always send first data block using
Albert Leee27486d2005-11-01 19:24:49 +08005656 * the ata_pio_task() codepath.
Albert Lee54f00382005-09-30 19:14:19 +08005657 */
Albert Lee312f7da2005-09-27 17:38:03 +08005658 } else {
Albert Lee54f00382005-09-30 19:14:19 +08005659 /* PIO data in protocol */
5660 ap->hsm_task_state = HSM_ST;
Albert Lee312f7da2005-09-27 17:38:03 +08005661
Albert Lee54f00382005-09-30 19:14:19 +08005662 if (qc->tf.flags & ATA_TFLAG_POLLING)
Albert Lee31ce6da2006-04-03 18:31:44 +08005663 ata_port_queue_task(ap, ata_pio_task, qc, 0);
Albert Lee312f7da2005-09-27 17:38:03 +08005664
Albert Lee54f00382005-09-30 19:14:19 +08005665 /* if polling, ata_pio_task() handles the rest.
5666 * otherwise, interrupt handler takes over from here.
5667 */
Albert Lee312f7da2005-09-27 17:38:03 +08005668 }
5669
Linus Torvalds1da177e2005-04-16 15:20:36 -07005670 break;
5671
5672 case ATA_PROT_ATAPI:
Linus Torvalds1da177e2005-04-16 15:20:36 -07005673 case ATA_PROT_ATAPI_NODATA:
Albert Lee312f7da2005-09-27 17:38:03 +08005674 if (qc->tf.flags & ATA_TFLAG_POLLING)
5675 ata_qc_set_polling(qc);
5676
Jeff Garzike5338252005-10-30 21:37:17 -05005677 ata_tf_to_host(ap, &qc->tf);
Jeff Garzikf6ef65e2006-01-27 02:45:00 -05005678
Albert Lee312f7da2005-09-27 17:38:03 +08005679 ap->hsm_task_state = HSM_ST_FIRST;
5680
5681 /* send cdb by polling if no cdb interrupt */
5682 if ((!(qc->dev->flags & ATA_DFLAG_CDB_INTR)) ||
5683 (qc->tf.flags & ATA_TFLAG_POLLING))
Albert Lee31ce6da2006-04-03 18:31:44 +08005684 ata_port_queue_task(ap, ata_pio_task, qc, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005685 break;
5686
5687 case ATA_PROT_ATAPI_DMA:
Jeff Garzik587005d2006-02-11 18:17:32 -05005688 WARN_ON(qc->tf.flags & ATA_TFLAG_POLLING);
Albert Lee312f7da2005-09-27 17:38:03 +08005689
Linus Torvalds1da177e2005-04-16 15:20:36 -07005690 ap->ops->tf_load(ap, &qc->tf); /* load tf registers */
5691 ap->ops->bmdma_setup(qc); /* set up bmdma */
Albert Lee312f7da2005-09-27 17:38:03 +08005692 ap->hsm_task_state = HSM_ST_FIRST;
5693
5694 /* send cdb by polling if no cdb interrupt */
5695 if (!(qc->dev->flags & ATA_DFLAG_CDB_INTR))
Albert Lee31ce6da2006-04-03 18:31:44 +08005696 ata_port_queue_task(ap, ata_pio_task, qc, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005697 break;
5698
5699 default:
5700 WARN_ON(1);
Tejun Heo9a3d9eb2006-01-23 13:09:36 +09005701 return AC_ERR_SYSTEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005702 }
5703
5704 return 0;
5705}
5706
5707/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07005708 * ata_host_intr - Handle host interrupt for given (port, task)
5709 * @ap: Port on which interrupt arrived (possibly...)
5710 * @qc: Taskfile currently active in engine
5711 *
5712 * Handle host interrupt for given queued command. Currently,
5713 * only DMA interrupts are handled. All other commands are
5714 * handled via polling with interrupts disabled (nIEN bit).
5715 *
5716 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04005717 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005718 *
5719 * RETURNS:
5720 * One if interrupt was handled, zero if not (shared irq).
5721 */
5722
5723inline unsigned int ata_host_intr (struct ata_port *ap,
5724 struct ata_queued_cmd *qc)
5725{
Tejun Heo9af5c9c2007-08-06 18:36:22 +09005726 struct ata_eh_info *ehi = &ap->link.eh_info;
Albert Lee312f7da2005-09-27 17:38:03 +08005727 u8 status, host_stat = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005728
Albert Lee312f7da2005-09-27 17:38:03 +08005729 VPRINTK("ata%u: protocol %d task_state %d\n",
Tejun Heo44877b42007-02-21 01:06:51 +09005730 ap->print_id, qc->tf.protocol, ap->hsm_task_state);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005731
Albert Lee312f7da2005-09-27 17:38:03 +08005732 /* Check whether we are expecting interrupt in this state */
5733 switch (ap->hsm_task_state) {
5734 case HSM_ST_FIRST:
Albert Lee6912ccd2006-03-25 17:45:49 +08005735 /* Some pre-ATAPI-4 devices assert INTRQ
5736 * at this state when ready to receive CDB.
5737 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07005738
Albert Lee312f7da2005-09-27 17:38:03 +08005739 /* Check the ATA_DFLAG_CDB_INTR flag is enough here.
5740 * The flag was turned on only for atapi devices.
5741 * No need to check is_atapi_taskfile(&qc->tf) again.
5742 */
5743 if (!(qc->dev->flags & ATA_DFLAG_CDB_INTR))
Linus Torvalds1da177e2005-04-16 15:20:36 -07005744 goto idle_irq;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005745 break;
Albert Lee312f7da2005-09-27 17:38:03 +08005746 case HSM_ST_LAST:
5747 if (qc->tf.protocol == ATA_PROT_DMA ||
5748 qc->tf.protocol == ATA_PROT_ATAPI_DMA) {
5749 /* check status of DMA engine */
5750 host_stat = ap->ops->bmdma_status(ap);
Tejun Heo44877b42007-02-21 01:06:51 +09005751 VPRINTK("ata%u: host_stat 0x%X\n",
5752 ap->print_id, host_stat);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005753
Albert Lee312f7da2005-09-27 17:38:03 +08005754 /* if it's not our irq... */
5755 if (!(host_stat & ATA_DMA_INTR))
5756 goto idle_irq;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005757
Albert Lee312f7da2005-09-27 17:38:03 +08005758 /* before we do anything else, clear DMA-Start bit */
5759 ap->ops->bmdma_stop(qc);
Albert Leea4f16612005-12-26 16:40:53 +08005760
5761 if (unlikely(host_stat & ATA_DMA_ERR)) {
5762 /* error when transfering data to/from memory */
5763 qc->err_mask |= AC_ERR_HOST_BUS;
5764 ap->hsm_task_state = HSM_ST_ERR;
5765 }
Albert Lee312f7da2005-09-27 17:38:03 +08005766 }
5767 break;
5768 case HSM_ST:
5769 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005770 default:
5771 goto idle_irq;
5772 }
5773
Albert Lee312f7da2005-09-27 17:38:03 +08005774 /* check altstatus */
5775 status = ata_altstatus(ap);
5776 if (status & ATA_BUSY)
5777 goto idle_irq;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005778
Albert Lee312f7da2005-09-27 17:38:03 +08005779 /* check main status, clearing INTRQ */
5780 status = ata_chk_status(ap);
5781 if (unlikely(status & ATA_BUSY))
5782 goto idle_irq;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005783
Albert Lee312f7da2005-09-27 17:38:03 +08005784 /* ack bmdma irq events */
5785 ap->ops->irq_clear(ap);
5786
Albert Leebb5cb292006-03-25 17:48:02 +08005787 ata_hsm_move(ap, qc, status, 0);
Tejun Heoea547632006-11-17 12:06:21 +09005788
5789 if (unlikely(qc->err_mask) && (qc->tf.protocol == ATA_PROT_DMA ||
5790 qc->tf.protocol == ATA_PROT_ATAPI_DMA))
5791 ata_ehi_push_desc(ehi, "BMDMA stat 0x%x", host_stat);
5792
Linus Torvalds1da177e2005-04-16 15:20:36 -07005793 return 1; /* irq handled */
5794
5795idle_irq:
5796 ap->stats.idle_irq++;
5797
5798#ifdef ATA_IRQ_TRAP
5799 if ((ap->stats.idle_irq % 1000) == 0) {
Jeff Garzik6d32d302007-08-15 05:38:46 -04005800 ata_chk_status(ap);
5801 ap->ops->irq_clear(ap);
Tejun Heof15a1da2006-05-15 20:57:56 +09005802 ata_port_printk(ap, KERN_WARNING, "irq trap\n");
Alan Cox23cfce82006-03-21 16:06:53 +00005803 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005804 }
5805#endif
5806 return 0; /* irq not handled */
5807}
5808
5809/**
5810 * ata_interrupt - Default ATA host interrupt handler
Jeff Garzik0cba6322005-05-30 19:49:12 -04005811 * @irq: irq line (unused)
Jeff Garzikcca39742006-08-24 03:19:22 -04005812 * @dev_instance: pointer to our ata_host information structure
Linus Torvalds1da177e2005-04-16 15:20:36 -07005813 *
Jeff Garzik0cba6322005-05-30 19:49:12 -04005814 * Default interrupt handler for PCI IDE devices. Calls
5815 * ata_host_intr() for each port that is not disabled.
5816 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07005817 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04005818 * Obtains host lock during operation.
Linus Torvalds1da177e2005-04-16 15:20:36 -07005819 *
5820 * RETURNS:
Jeff Garzik0cba6322005-05-30 19:49:12 -04005821 * IRQ_NONE or IRQ_HANDLED.
Linus Torvalds1da177e2005-04-16 15:20:36 -07005822 */
5823
David Howells7d12e782006-10-05 14:55:46 +01005824irqreturn_t ata_interrupt (int irq, void *dev_instance)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005825{
Jeff Garzikcca39742006-08-24 03:19:22 -04005826 struct ata_host *host = dev_instance;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005827 unsigned int i;
5828 unsigned int handled = 0;
5829 unsigned long flags;
5830
5831 /* TODO: make _irqsave conditional on x86 PCI IDE legacy mode */
Jeff Garzikcca39742006-08-24 03:19:22 -04005832 spin_lock_irqsave(&host->lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005833
Jeff Garzikcca39742006-08-24 03:19:22 -04005834 for (i = 0; i < host->n_ports; i++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07005835 struct ata_port *ap;
5836
Jeff Garzikcca39742006-08-24 03:19:22 -04005837 ap = host->ports[i];
Tejun Heoc1389502005-08-22 14:59:24 +09005838 if (ap &&
Jeff Garzik029f5462006-04-02 10:30:40 -04005839 !(ap->flags & ATA_FLAG_DISABLED)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07005840 struct ata_queued_cmd *qc;
5841
Tejun Heo9af5c9c2007-08-06 18:36:22 +09005842 qc = ata_qc_from_tag(ap, ap->link.active_tag);
Albert Lee312f7da2005-09-27 17:38:03 +08005843 if (qc && (!(qc->tf.flags & ATA_TFLAG_POLLING)) &&
Albert Lee21b1ed72005-04-29 17:34:59 +08005844 (qc->flags & ATA_QCFLAG_ACTIVE))
Linus Torvalds1da177e2005-04-16 15:20:36 -07005845 handled |= ata_host_intr(ap, qc);
5846 }
5847 }
5848
Jeff Garzikcca39742006-08-24 03:19:22 -04005849 spin_unlock_irqrestore(&host->lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005850
5851 return IRQ_RETVAL(handled);
5852}
5853
Tejun Heo34bf2172006-05-15 20:57:46 +09005854/**
5855 * sata_scr_valid - test whether SCRs are accessible
Tejun Heo936fd732007-08-06 18:36:23 +09005856 * @link: ATA link to test SCR accessibility for
Tejun Heo34bf2172006-05-15 20:57:46 +09005857 *
Tejun Heo936fd732007-08-06 18:36:23 +09005858 * Test whether SCRs are accessible for @link.
Tejun Heo34bf2172006-05-15 20:57:46 +09005859 *
5860 * LOCKING:
5861 * None.
5862 *
5863 * RETURNS:
5864 * 1 if SCRs are accessible, 0 otherwise.
5865 */
Tejun Heo936fd732007-08-06 18:36:23 +09005866int sata_scr_valid(struct ata_link *link)
Tejun Heo34bf2172006-05-15 20:57:46 +09005867{
Tejun Heo936fd732007-08-06 18:36:23 +09005868 struct ata_port *ap = link->ap;
5869
Tejun Heoa16abc02007-05-21 18:33:47 +02005870 return (ap->flags & ATA_FLAG_SATA) && ap->ops->scr_read;
Tejun Heo34bf2172006-05-15 20:57:46 +09005871}
5872
5873/**
5874 * sata_scr_read - read SCR register of the specified port
Tejun Heo936fd732007-08-06 18:36:23 +09005875 * @link: ATA link to read SCR for
Tejun Heo34bf2172006-05-15 20:57:46 +09005876 * @reg: SCR to read
5877 * @val: Place to store read value
5878 *
Tejun Heo936fd732007-08-06 18:36:23 +09005879 * Read SCR register @reg of @link into *@val. This function is
Tejun Heo34bf2172006-05-15 20:57:46 +09005880 * guaranteed to succeed if the cable type of the port is SATA
5881 * and the port implements ->scr_read.
5882 *
5883 * LOCKING:
5884 * None.
5885 *
5886 * RETURNS:
5887 * 0 on success, negative errno on failure.
5888 */
Tejun Heo936fd732007-08-06 18:36:23 +09005889int sata_scr_read(struct ata_link *link, int reg, u32 *val)
Tejun Heo34bf2172006-05-15 20:57:46 +09005890{
Tejun Heo936fd732007-08-06 18:36:23 +09005891 struct ata_port *ap = link->ap;
5892
5893 if (sata_scr_valid(link))
Tejun Heoda3dbb12007-07-16 14:29:40 +09005894 return ap->ops->scr_read(ap, reg, val);
Tejun Heo34bf2172006-05-15 20:57:46 +09005895 return -EOPNOTSUPP;
5896}
5897
5898/**
5899 * sata_scr_write - write SCR register of the specified port
Tejun Heo936fd732007-08-06 18:36:23 +09005900 * @link: ATA link to write SCR for
Tejun Heo34bf2172006-05-15 20:57:46 +09005901 * @reg: SCR to write
5902 * @val: value to write
5903 *
Tejun Heo936fd732007-08-06 18:36:23 +09005904 * Write @val to SCR register @reg of @link. This function is
Tejun Heo34bf2172006-05-15 20:57:46 +09005905 * guaranteed to succeed if the cable type of the port is SATA
5906 * and the port implements ->scr_read.
5907 *
5908 * LOCKING:
5909 * None.
5910 *
5911 * RETURNS:
5912 * 0 on success, negative errno on failure.
5913 */
Tejun Heo936fd732007-08-06 18:36:23 +09005914int sata_scr_write(struct ata_link *link, int reg, u32 val)
Tejun Heo34bf2172006-05-15 20:57:46 +09005915{
Tejun Heo936fd732007-08-06 18:36:23 +09005916 struct ata_port *ap = link->ap;
5917
5918 if (sata_scr_valid(link))
Tejun Heoda3dbb12007-07-16 14:29:40 +09005919 return ap->ops->scr_write(ap, reg, val);
Tejun Heo34bf2172006-05-15 20:57:46 +09005920 return -EOPNOTSUPP;
5921}
5922
5923/**
5924 * sata_scr_write_flush - write SCR register of the specified port and flush
Tejun Heo936fd732007-08-06 18:36:23 +09005925 * @link: ATA link to write SCR for
Tejun Heo34bf2172006-05-15 20:57:46 +09005926 * @reg: SCR to write
5927 * @val: value to write
5928 *
5929 * This function is identical to sata_scr_write() except that this
5930 * function performs flush after writing to the register.
5931 *
5932 * LOCKING:
5933 * None.
5934 *
5935 * RETURNS:
5936 * 0 on success, negative errno on failure.
5937 */
Tejun Heo936fd732007-08-06 18:36:23 +09005938int sata_scr_write_flush(struct ata_link *link, int reg, u32 val)
Tejun Heo34bf2172006-05-15 20:57:46 +09005939{
Tejun Heo936fd732007-08-06 18:36:23 +09005940 struct ata_port *ap = link->ap;
Tejun Heoda3dbb12007-07-16 14:29:40 +09005941 int rc;
5942
Tejun Heo936fd732007-08-06 18:36:23 +09005943 if (sata_scr_valid(link)) {
Tejun Heoda3dbb12007-07-16 14:29:40 +09005944 rc = ap->ops->scr_write(ap, reg, val);
5945 if (rc == 0)
5946 rc = ap->ops->scr_read(ap, reg, &val);
5947 return rc;
Tejun Heo34bf2172006-05-15 20:57:46 +09005948 }
5949 return -EOPNOTSUPP;
5950}
5951
5952/**
Tejun Heo936fd732007-08-06 18:36:23 +09005953 * ata_link_online - test whether the given link is online
5954 * @link: ATA link to test
Tejun Heo34bf2172006-05-15 20:57:46 +09005955 *
Tejun Heo936fd732007-08-06 18:36:23 +09005956 * Test whether @link is online. Note that this function returns
5957 * 0 if online status of @link cannot be obtained, so
5958 * ata_link_online(link) != !ata_link_offline(link).
Tejun Heo34bf2172006-05-15 20:57:46 +09005959 *
5960 * LOCKING:
5961 * None.
5962 *
5963 * RETURNS:
5964 * 1 if the port online status is available and online.
5965 */
Tejun Heo936fd732007-08-06 18:36:23 +09005966int ata_link_online(struct ata_link *link)
Tejun Heo34bf2172006-05-15 20:57:46 +09005967{
5968 u32 sstatus;
5969
Tejun Heo936fd732007-08-06 18:36:23 +09005970 if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0 &&
5971 (sstatus & 0xf) == 0x3)
Tejun Heo34bf2172006-05-15 20:57:46 +09005972 return 1;
5973 return 0;
5974}
5975
5976/**
Tejun Heo936fd732007-08-06 18:36:23 +09005977 * ata_link_offline - test whether the given link is offline
5978 * @link: ATA link to test
Tejun Heo34bf2172006-05-15 20:57:46 +09005979 *
Tejun Heo936fd732007-08-06 18:36:23 +09005980 * Test whether @link is offline. Note that this function
5981 * returns 0 if offline status of @link cannot be obtained, so
5982 * ata_link_online(link) != !ata_link_offline(link).
Tejun Heo34bf2172006-05-15 20:57:46 +09005983 *
5984 * LOCKING:
5985 * None.
5986 *
5987 * RETURNS:
5988 * 1 if the port offline status is available and offline.
5989 */
Tejun Heo936fd732007-08-06 18:36:23 +09005990int ata_link_offline(struct ata_link *link)
Tejun Heo34bf2172006-05-15 20:57:46 +09005991{
5992 u32 sstatus;
5993
Tejun Heo936fd732007-08-06 18:36:23 +09005994 if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0 &&
5995 (sstatus & 0xf) != 0x3)
Tejun Heo34bf2172006-05-15 20:57:46 +09005996 return 1;
5997 return 0;
5998}
Edward Falk0baab862005-06-02 18:17:13 -04005999
Tejun Heo77b08fb2006-06-24 20:30:19 +09006000int ata_flush_cache(struct ata_device *dev)
Jens Axboe9b847542006-01-06 09:28:07 +01006001{
Tejun Heo977e6b92006-06-24 20:30:19 +09006002 unsigned int err_mask;
Jens Axboe9b847542006-01-06 09:28:07 +01006003 u8 cmd;
6004
6005 if (!ata_try_flush_cache(dev))
6006 return 0;
6007
Tejun Heo6fc49ad2006-11-11 20:10:45 +09006008 if (dev->flags & ATA_DFLAG_FLUSH_EXT)
Jens Axboe9b847542006-01-06 09:28:07 +01006009 cmd = ATA_CMD_FLUSH_EXT;
6010 else
6011 cmd = ATA_CMD_FLUSH;
6012
Alan Cox4f343372007-08-08 14:30:31 +01006013 /* This is wrong. On a failed flush we get back the LBA of the lost
6014 sector and we should (assuming it wasn't aborted as unknown) issue
6015 a further flush command to continue the writeback until it
6016 does not error */
Tejun Heo977e6b92006-06-24 20:30:19 +09006017 err_mask = ata_do_simple_cmd(dev, cmd);
6018 if (err_mask) {
6019 ata_dev_printk(dev, KERN_ERR, "failed to flush cache\n");
6020 return -EIO;
6021 }
6022
6023 return 0;
Jens Axboe9b847542006-01-06 09:28:07 +01006024}
6025
Tejun Heo6ffa01d2007-03-02 17:32:47 +09006026#ifdef CONFIG_PM
Jeff Garzikcca39742006-08-24 03:19:22 -04006027static int ata_host_request_pm(struct ata_host *host, pm_message_t mesg,
6028 unsigned int action, unsigned int ehi_flags,
6029 int wait)
Tejun Heo500530f2006-07-03 16:07:27 +09006030{
6031 unsigned long flags;
6032 int i, rc;
6033
Jeff Garzikcca39742006-08-24 03:19:22 -04006034 for (i = 0; i < host->n_ports; i++) {
6035 struct ata_port *ap = host->ports[i];
Tejun Heoe3667eb2007-08-06 18:36:24 +09006036 struct ata_link *link;
Tejun Heo500530f2006-07-03 16:07:27 +09006037
6038 /* Previous resume operation might still be in
6039 * progress. Wait for PM_PENDING to clear.
6040 */
6041 if (ap->pflags & ATA_PFLAG_PM_PENDING) {
6042 ata_port_wait_eh(ap);
6043 WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING);
6044 }
6045
6046 /* request PM ops to EH */
6047 spin_lock_irqsave(ap->lock, flags);
6048
6049 ap->pm_mesg = mesg;
6050 if (wait) {
6051 rc = 0;
6052 ap->pm_result = &rc;
6053 }
6054
6055 ap->pflags |= ATA_PFLAG_PM_PENDING;
Tejun Heoe3667eb2007-08-06 18:36:24 +09006056 __ata_port_for_each_link(link, ap) {
6057 link->eh_info.action |= action;
6058 link->eh_info.flags |= ehi_flags;
6059 }
Tejun Heo500530f2006-07-03 16:07:27 +09006060
6061 ata_port_schedule_eh(ap);
6062
6063 spin_unlock_irqrestore(ap->lock, flags);
6064
6065 /* wait and check result */
6066 if (wait) {
6067 ata_port_wait_eh(ap);
6068 WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING);
6069 if (rc)
6070 return rc;
6071 }
6072 }
6073
6074 return 0;
6075}
6076
6077/**
Jeff Garzikcca39742006-08-24 03:19:22 -04006078 * ata_host_suspend - suspend host
6079 * @host: host to suspend
Tejun Heo500530f2006-07-03 16:07:27 +09006080 * @mesg: PM message
6081 *
Jeff Garzikcca39742006-08-24 03:19:22 -04006082 * Suspend @host. Actual operation is performed by EH. This
Tejun Heo500530f2006-07-03 16:07:27 +09006083 * function requests EH to perform PM operations and waits for EH
6084 * to finish.
6085 *
6086 * LOCKING:
6087 * Kernel thread context (may sleep).
6088 *
6089 * RETURNS:
6090 * 0 on success, -errno on failure.
6091 */
Jeff Garzikcca39742006-08-24 03:19:22 -04006092int ata_host_suspend(struct ata_host *host, pm_message_t mesg)
Tejun Heo500530f2006-07-03 16:07:27 +09006093{
Tejun Heo9666f402007-05-04 21:27:47 +02006094 int rc;
Tejun Heo500530f2006-07-03 16:07:27 +09006095
Jeff Garzikcca39742006-08-24 03:19:22 -04006096 rc = ata_host_request_pm(host, mesg, 0, ATA_EHI_QUIET, 1);
Tejun Heo9666f402007-05-04 21:27:47 +02006097 if (rc == 0)
6098 host->dev->power.power_state = mesg;
Tejun Heo500530f2006-07-03 16:07:27 +09006099 return rc;
6100}
6101
6102/**
Jeff Garzikcca39742006-08-24 03:19:22 -04006103 * ata_host_resume - resume host
6104 * @host: host to resume
Tejun Heo500530f2006-07-03 16:07:27 +09006105 *
Jeff Garzikcca39742006-08-24 03:19:22 -04006106 * Resume @host. Actual operation is performed by EH. This
Tejun Heo500530f2006-07-03 16:07:27 +09006107 * function requests EH to perform PM operations and returns.
6108 * Note that all resume operations are performed parallely.
6109 *
6110 * LOCKING:
6111 * Kernel thread context (may sleep).
6112 */
Jeff Garzikcca39742006-08-24 03:19:22 -04006113void ata_host_resume(struct ata_host *host)
Tejun Heo500530f2006-07-03 16:07:27 +09006114{
Jeff Garzikcca39742006-08-24 03:19:22 -04006115 ata_host_request_pm(host, PMSG_ON, ATA_EH_SOFTRESET,
6116 ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET, 0);
6117 host->dev->power.power_state = PMSG_ON;
Tejun Heo500530f2006-07-03 16:07:27 +09006118}
Tejun Heo6ffa01d2007-03-02 17:32:47 +09006119#endif
Tejun Heo500530f2006-07-03 16:07:27 +09006120
Randy Dunlapc893a3a2006-01-28 13:15:32 -05006121/**
6122 * ata_port_start - Set port up for dma.
6123 * @ap: Port to initialize
6124 *
6125 * Called just after data structures for each port are
6126 * initialized. Allocates space for PRD table.
6127 *
6128 * May be used as the port_start() entry in ata_port_operations.
6129 *
6130 * LOCKING:
6131 * Inherited from caller.
6132 */
Tejun Heof0d36ef2007-01-20 16:00:28 +09006133int ata_port_start(struct ata_port *ap)
Linus Torvalds1da177e2005-04-16 15:20:36 -07006134{
Brian King2f1f6102006-03-23 17:30:15 -06006135 struct device *dev = ap->dev;
Jeff Garzik6037d6b2005-11-04 22:08:00 -05006136 int rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07006137
Tejun Heof0d36ef2007-01-20 16:00:28 +09006138 ap->prd = dmam_alloc_coherent(dev, ATA_PRD_TBL_SZ, &ap->prd_dma,
6139 GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006140 if (!ap->prd)
6141 return -ENOMEM;
6142
Jeff Garzik6037d6b2005-11-04 22:08:00 -05006143 rc = ata_pad_alloc(ap, dev);
Tejun Heof0d36ef2007-01-20 16:00:28 +09006144 if (rc)
Jeff Garzik6037d6b2005-11-04 22:08:00 -05006145 return rc;
Jeff Garzikcedc9a42005-10-05 07:13:30 -04006146
Tejun Heof0d36ef2007-01-20 16:00:28 +09006147 DPRINTK("prd alloc, virt %p, dma %llx\n", ap->prd,
6148 (unsigned long long)ap->prd_dma);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006149 return 0;
6150}
6151
Edward Falk0baab862005-06-02 18:17:13 -04006152/**
Tejun Heo3ef3b432006-05-31 18:27:30 +09006153 * ata_dev_init - Initialize an ata_device structure
6154 * @dev: Device structure to initialize
6155 *
6156 * Initialize @dev in preparation for probing.
6157 *
6158 * LOCKING:
6159 * Inherited from caller.
6160 */
6161void ata_dev_init(struct ata_device *dev)
6162{
Tejun Heo9af5c9c2007-08-06 18:36:22 +09006163 struct ata_link *link = dev->link;
6164 struct ata_port *ap = link->ap;
Tejun Heo72fa4b72006-05-31 18:27:32 +09006165 unsigned long flags;
Tejun Heo3ef3b432006-05-31 18:27:30 +09006166
Tejun Heo5a04bf42006-05-31 18:27:38 +09006167 /* SATA spd limit is bound to the first device */
Tejun Heo9af5c9c2007-08-06 18:36:22 +09006168 link->sata_spd_limit = link->hw_sata_spd_limit;
6169 link->sata_spd = 0;
Tejun Heo5a04bf42006-05-31 18:27:38 +09006170
Tejun Heo72fa4b72006-05-31 18:27:32 +09006171 /* High bits of dev->flags are used to record warm plug
6172 * requests which occur asynchronously. Synchronize using
Jeff Garzikcca39742006-08-24 03:19:22 -04006173 * host lock.
Tejun Heo72fa4b72006-05-31 18:27:32 +09006174 */
Jeff Garzikba6a1302006-06-22 23:46:10 -04006175 spin_lock_irqsave(ap->lock, flags);
Tejun Heo72fa4b72006-05-31 18:27:32 +09006176 dev->flags &= ~ATA_DFLAG_INIT_MASK;
Tejun Heo3dcc3232007-09-03 12:20:11 +09006177 dev->horkage = 0;
Jeff Garzikba6a1302006-06-22 23:46:10 -04006178 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heo72fa4b72006-05-31 18:27:32 +09006179
6180 memset((void *)dev + ATA_DEVICE_CLEAR_OFFSET, 0,
6181 sizeof(*dev) - ATA_DEVICE_CLEAR_OFFSET);
Tejun Heo3ef3b432006-05-31 18:27:30 +09006182 dev->pio_mask = UINT_MAX;
6183 dev->mwdma_mask = UINT_MAX;
6184 dev->udma_mask = UINT_MAX;
6185}
6186
6187/**
Tejun Heo4fb37a22007-08-06 18:36:23 +09006188 * ata_link_init - Initialize an ata_link structure
6189 * @ap: ATA port link is attached to
6190 * @link: Link structure to initialize
Tejun Heo89898052007-08-06 18:36:23 +09006191 * @pmp: Port multiplier port number
Tejun Heo4fb37a22007-08-06 18:36:23 +09006192 *
6193 * Initialize @link.
6194 *
6195 * LOCKING:
6196 * Kernel thread context (may sleep)
6197 */
Tejun Heo89898052007-08-06 18:36:23 +09006198static void ata_link_init(struct ata_port *ap, struct ata_link *link, int pmp)
Tejun Heo4fb37a22007-08-06 18:36:23 +09006199{
6200 int i;
6201
6202 /* clear everything except for devices */
6203 memset(link, 0, offsetof(struct ata_link, device[0]));
6204
6205 link->ap = ap;
Tejun Heo89898052007-08-06 18:36:23 +09006206 link->pmp = pmp;
Tejun Heo4fb37a22007-08-06 18:36:23 +09006207 link->active_tag = ATA_TAG_POISON;
6208 link->hw_sata_spd_limit = UINT_MAX;
6209
6210 /* can't use iterator, ap isn't initialized yet */
6211 for (i = 0; i < ATA_MAX_DEVICES; i++) {
6212 struct ata_device *dev = &link->device[i];
6213
6214 dev->link = link;
6215 dev->devno = dev - link->device;
6216 ata_dev_init(dev);
6217 }
6218}
6219
6220/**
6221 * sata_link_init_spd - Initialize link->sata_spd_limit
6222 * @link: Link to configure sata_spd_limit for
6223 *
6224 * Initialize @link->[hw_]sata_spd_limit to the currently
6225 * configured value.
6226 *
6227 * LOCKING:
6228 * Kernel thread context (may sleep).
6229 *
6230 * RETURNS:
6231 * 0 on success, -errno on failure.
6232 */
6233static int sata_link_init_spd(struct ata_link *link)
6234{
6235 u32 scontrol, spd;
6236 int rc;
6237
6238 rc = sata_scr_read(link, SCR_CONTROL, &scontrol);
6239 if (rc)
6240 return rc;
6241
6242 spd = (scontrol >> 4) & 0xf;
6243 if (spd)
6244 link->hw_sata_spd_limit &= (1 << spd) - 1;
6245
6246 link->sata_spd_limit = link->hw_sata_spd_limit;
6247
6248 return 0;
6249}
6250
6251/**
Tejun Heof3187192007-04-17 23:44:07 +09006252 * ata_port_alloc - allocate and initialize basic ATA port resources
6253 * @host: ATA host this allocated port belongs to
Linus Torvalds1da177e2005-04-16 15:20:36 -07006254 *
Tejun Heof3187192007-04-17 23:44:07 +09006255 * Allocate and initialize basic ATA port resources.
6256 *
6257 * RETURNS:
6258 * Allocate ATA port on success, NULL on failure.
Jeff Garzik0cba6322005-05-30 19:49:12 -04006259 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07006260 * LOCKING:
Tejun Heof3187192007-04-17 23:44:07 +09006261 * Inherited from calling layer (may sleep).
Linus Torvalds1da177e2005-04-16 15:20:36 -07006262 */
Tejun Heof3187192007-04-17 23:44:07 +09006263struct ata_port *ata_port_alloc(struct ata_host *host)
Linus Torvalds1da177e2005-04-16 15:20:36 -07006264{
Tejun Heof3187192007-04-17 23:44:07 +09006265 struct ata_port *ap;
Linus Torvalds1da177e2005-04-16 15:20:36 -07006266
Tejun Heof3187192007-04-17 23:44:07 +09006267 DPRINTK("ENTER\n");
6268
6269 ap = kzalloc(sizeof(*ap), GFP_KERNEL);
6270 if (!ap)
6271 return NULL;
6272
Tejun Heof4d6d002007-05-01 11:50:15 +02006273 ap->pflags |= ATA_PFLAG_INITIALIZING;
Jeff Garzikcca39742006-08-24 03:19:22 -04006274 ap->lock = &host->lock;
Tejun Heo198e0fe2006-04-02 18:51:52 +09006275 ap->flags = ATA_FLAG_DISABLED;
Tejun Heof3187192007-04-17 23:44:07 +09006276 ap->print_id = -1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07006277 ap->ctl = ATA_DEVCTL_OBS;
Jeff Garzikcca39742006-08-24 03:19:22 -04006278 ap->host = host;
Tejun Heof3187192007-04-17 23:44:07 +09006279 ap->dev = host->dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07006280 ap->last_ctl = 0xFF;
Borislav Petkovbd5d8252006-06-11 23:17:01 -04006281
6282#if defined(ATA_VERBOSE_DEBUG)
6283 /* turn on all debugging levels */
6284 ap->msg_enable = 0x00FF;
6285#elif defined(ATA_DEBUG)
6286 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 +09006287#else
Borislav Petkov0dd4b212006-06-23 02:29:08 -04006288 ap->msg_enable = ATA_MSG_DRV | ATA_MSG_ERR | ATA_MSG_WARN;
Borislav Petkovbd5d8252006-06-11 23:17:01 -04006289#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07006290
David Howells65f27f32006-11-22 14:55:48 +00006291 INIT_DELAYED_WORK(&ap->port_task, NULL);
6292 INIT_DELAYED_WORK(&ap->hotplug_task, ata_scsi_hotplug);
6293 INIT_WORK(&ap->scsi_rescan_task, ata_scsi_dev_rescan);
Tejun Heoa72ec4c2006-01-23 13:09:37 +09006294 INIT_LIST_HEAD(&ap->eh_done_q);
Tejun Heoc6cf9e92006-05-31 18:27:27 +09006295 init_waitqueue_head(&ap->eh_wait_q);
Tejun Heo5ddf24c2007-07-16 14:29:41 +09006296 init_timer_deferrable(&ap->fastdrain_timer);
6297 ap->fastdrain_timer.function = ata_eh_fastdrain_timerfn;
6298 ap->fastdrain_timer.data = (unsigned long)ap;
Linus Torvalds1da177e2005-04-16 15:20:36 -07006299
Tejun Heo838df622006-05-15 20:57:44 +09006300 ap->cbl = ATA_CBL_NONE;
Tejun Heo838df622006-05-15 20:57:44 +09006301
Tejun Heo89898052007-08-06 18:36:23 +09006302 ata_link_init(ap, &ap->link, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006303
6304#ifdef ATA_IRQ_TRAP
6305 ap->stats.unhandled_irq = 1;
6306 ap->stats.idle_irq = 1;
6307#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07006308 return ap;
Linus Torvalds1da177e2005-04-16 15:20:36 -07006309}
6310
Tejun Heof0d36ef2007-01-20 16:00:28 +09006311static void ata_host_release(struct device *gendev, void *res)
6312{
6313 struct ata_host *host = dev_get_drvdata(gendev);
6314 int i;
6315
6316 for (i = 0; i < host->n_ports; i++) {
6317 struct ata_port *ap = host->ports[i];
6318
Tejun Heoecef7252007-04-17 23:44:06 +09006319 if (!ap)
6320 continue;
6321
6322 if ((host->flags & ATA_HOST_STARTED) && ap->ops->port_stop)
Tejun Heof0d36ef2007-01-20 16:00:28 +09006323 ap->ops->port_stop(ap);
Tejun Heof0d36ef2007-01-20 16:00:28 +09006324 }
6325
Tejun Heoecef7252007-04-17 23:44:06 +09006326 if ((host->flags & ATA_HOST_STARTED) && host->ops->host_stop)
Tejun Heof0d36ef2007-01-20 16:00:28 +09006327 host->ops->host_stop(host);
Tejun Heo1aa56cc2007-02-27 22:33:21 +09006328
Tejun Heo1aa506e2007-03-09 19:36:12 +09006329 for (i = 0; i < host->n_ports; i++) {
6330 struct ata_port *ap = host->ports[i];
6331
Tejun Heo49114872007-04-17 23:44:06 +09006332 if (!ap)
6333 continue;
6334
6335 if (ap->scsi_host)
Tejun Heo1aa506e2007-03-09 19:36:12 +09006336 scsi_host_put(ap->scsi_host);
6337
Tejun Heo49114872007-04-17 23:44:06 +09006338 kfree(ap);
Tejun Heo1aa506e2007-03-09 19:36:12 +09006339 host->ports[i] = NULL;
6340 }
6341
Tejun Heo1aa56cc2007-02-27 22:33:21 +09006342 dev_set_drvdata(gendev, NULL);
Tejun Heof0d36ef2007-01-20 16:00:28 +09006343}
6344
Linus Torvalds1da177e2005-04-16 15:20:36 -07006345/**
Tejun Heof3187192007-04-17 23:44:07 +09006346 * ata_host_alloc - allocate and init basic ATA host resources
6347 * @dev: generic device this host is associated with
6348 * @max_ports: maximum number of ATA ports associated with this host
6349 *
6350 * Allocate and initialize basic ATA host resources. LLD calls
6351 * this function to allocate a host, initializes it fully and
6352 * attaches it using ata_host_register().
6353 *
6354 * @max_ports ports are allocated and host->n_ports is
6355 * initialized to @max_ports. The caller is allowed to decrease
6356 * host->n_ports before calling ata_host_register(). The unused
6357 * ports will be automatically freed on registration.
6358 *
6359 * RETURNS:
6360 * Allocate ATA host on success, NULL on failure.
6361 *
6362 * LOCKING:
6363 * Inherited from calling layer (may sleep).
6364 */
6365struct ata_host *ata_host_alloc(struct device *dev, int max_ports)
6366{
6367 struct ata_host *host;
6368 size_t sz;
6369 int i;
6370
6371 DPRINTK("ENTER\n");
6372
6373 if (!devres_open_group(dev, NULL, GFP_KERNEL))
6374 return NULL;
6375
6376 /* alloc a container for our list of ATA ports (buses) */
6377 sz = sizeof(struct ata_host) + (max_ports + 1) * sizeof(void *);
6378 /* alloc a container for our list of ATA ports (buses) */
6379 host = devres_alloc(ata_host_release, sz, GFP_KERNEL);
6380 if (!host)
6381 goto err_out;
6382
6383 devres_add(dev, host);
6384 dev_set_drvdata(dev, host);
6385
6386 spin_lock_init(&host->lock);
6387 host->dev = dev;
6388 host->n_ports = max_ports;
6389
6390 /* allocate ports bound to this host */
6391 for (i = 0; i < max_ports; i++) {
6392 struct ata_port *ap;
6393
6394 ap = ata_port_alloc(host);
6395 if (!ap)
6396 goto err_out;
6397
6398 ap->port_no = i;
6399 host->ports[i] = ap;
6400 }
6401
6402 devres_remove_group(dev, NULL);
6403 return host;
6404
6405 err_out:
6406 devres_release_group(dev, NULL);
6407 return NULL;
6408}
6409
6410/**
Tejun Heof5cda252007-04-17 23:44:07 +09006411 * ata_host_alloc_pinfo - alloc host and init with port_info array
6412 * @dev: generic device this host is associated with
6413 * @ppi: array of ATA port_info to initialize host with
6414 * @n_ports: number of ATA ports attached to this host
6415 *
6416 * Allocate ATA host and initialize with info from @ppi. If NULL
6417 * terminated, @ppi may contain fewer entries than @n_ports. The
6418 * last entry will be used for the remaining ports.
6419 *
6420 * RETURNS:
6421 * Allocate ATA host on success, NULL on failure.
6422 *
6423 * LOCKING:
6424 * Inherited from calling layer (may sleep).
6425 */
6426struct ata_host *ata_host_alloc_pinfo(struct device *dev,
6427 const struct ata_port_info * const * ppi,
6428 int n_ports)
6429{
6430 const struct ata_port_info *pi;
6431 struct ata_host *host;
6432 int i, j;
6433
6434 host = ata_host_alloc(dev, n_ports);
6435 if (!host)
6436 return NULL;
6437
6438 for (i = 0, j = 0, pi = NULL; i < host->n_ports; i++) {
6439 struct ata_port *ap = host->ports[i];
6440
6441 if (ppi[j])
6442 pi = ppi[j++];
6443
6444 ap->pio_mask = pi->pio_mask;
6445 ap->mwdma_mask = pi->mwdma_mask;
6446 ap->udma_mask = pi->udma_mask;
6447 ap->flags |= pi->flags;
Tejun Heo0c887582007-08-06 18:36:23 +09006448 ap->link.flags |= pi->link_flags;
Tejun Heof5cda252007-04-17 23:44:07 +09006449 ap->ops = pi->port_ops;
6450
6451 if (!host->ops && (pi->port_ops != &ata_dummy_port_ops))
6452 host->ops = pi->port_ops;
6453 if (!host->private_data && pi->private_data)
6454 host->private_data = pi->private_data;
6455 }
6456
6457 return host;
6458}
6459
6460/**
Tejun Heoecef7252007-04-17 23:44:06 +09006461 * ata_host_start - start and freeze ports of an ATA host
6462 * @host: ATA host to start ports for
6463 *
6464 * Start and then freeze ports of @host. Started status is
6465 * recorded in host->flags, so this function can be called
6466 * multiple times. Ports are guaranteed to get started only
Tejun Heof3187192007-04-17 23:44:07 +09006467 * once. If host->ops isn't initialized yet, its set to the
6468 * first non-dummy port ops.
Tejun Heoecef7252007-04-17 23:44:06 +09006469 *
6470 * LOCKING:
6471 * Inherited from calling layer (may sleep).
6472 *
6473 * RETURNS:
6474 * 0 if all ports are started successfully, -errno otherwise.
6475 */
6476int ata_host_start(struct ata_host *host)
6477{
6478 int i, rc;
6479
6480 if (host->flags & ATA_HOST_STARTED)
6481 return 0;
6482
6483 for (i = 0; i < host->n_ports; i++) {
6484 struct ata_port *ap = host->ports[i];
6485
Tejun Heof3187192007-04-17 23:44:07 +09006486 if (!host->ops && !ata_port_is_dummy(ap))
6487 host->ops = ap->ops;
6488
Tejun Heoecef7252007-04-17 23:44:06 +09006489 if (ap->ops->port_start) {
6490 rc = ap->ops->port_start(ap);
6491 if (rc) {
6492 ata_port_printk(ap, KERN_ERR, "failed to "
6493 "start port (errno=%d)\n", rc);
6494 goto err_out;
6495 }
6496 }
6497
6498 ata_eh_freeze_port(ap);
6499 }
6500
6501 host->flags |= ATA_HOST_STARTED;
6502 return 0;
6503
6504 err_out:
6505 while (--i >= 0) {
6506 struct ata_port *ap = host->ports[i];
6507
6508 if (ap->ops->port_stop)
6509 ap->ops->port_stop(ap);
6510 }
6511 return rc;
6512}
6513
6514/**
Jeff Garzikcca39742006-08-24 03:19:22 -04006515 * ata_sas_host_init - Initialize a host struct
6516 * @host: host to initialize
6517 * @dev: device host is attached to
6518 * @flags: host flags
6519 * @ops: port_ops
Brian Kingb03732f2006-08-07 14:27:10 -05006520 *
6521 * LOCKING:
6522 * PCI/etc. bus probe sem.
6523 *
6524 */
Tejun Heof3187192007-04-17 23:44:07 +09006525/* KILLME - the only user left is ipr */
Jeff Garzikcca39742006-08-24 03:19:22 -04006526void ata_host_init(struct ata_host *host, struct device *dev,
6527 unsigned long flags, const struct ata_port_operations *ops)
Brian Kingb03732f2006-08-07 14:27:10 -05006528{
Jeff Garzikcca39742006-08-24 03:19:22 -04006529 spin_lock_init(&host->lock);
6530 host->dev = dev;
6531 host->flags = flags;
6532 host->ops = ops;
Brian Kingb03732f2006-08-07 14:27:10 -05006533}
6534
6535/**
Tejun Heof3187192007-04-17 23:44:07 +09006536 * ata_host_register - register initialized ATA host
6537 * @host: ATA host to register
6538 * @sht: template for SCSI host
Jeff Garzik0cba6322005-05-30 19:49:12 -04006539 *
Tejun Heof3187192007-04-17 23:44:07 +09006540 * Register initialized ATA host. @host is allocated using
6541 * ata_host_alloc() and fully initialized by LLD. This function
6542 * starts ports, registers @host with ATA and SCSI layers and
6543 * probe registered devices.
Linus Torvalds1da177e2005-04-16 15:20:36 -07006544 *
6545 * LOCKING:
Tejun Heof3187192007-04-17 23:44:07 +09006546 * Inherited from calling layer (may sleep).
Linus Torvalds1da177e2005-04-16 15:20:36 -07006547 *
6548 * RETURNS:
Tejun Heof3187192007-04-17 23:44:07 +09006549 * 0 on success, -errno otherwise.
Linus Torvalds1da177e2005-04-16 15:20:36 -07006550 */
Tejun Heof3187192007-04-17 23:44:07 +09006551int ata_host_register(struct ata_host *host, struct scsi_host_template *sht)
Linus Torvalds1da177e2005-04-16 15:20:36 -07006552{
Tejun Heof3187192007-04-17 23:44:07 +09006553 int i, rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07006554
Tejun Heof3187192007-04-17 23:44:07 +09006555 /* host must have been started */
6556 if (!(host->flags & ATA_HOST_STARTED)) {
6557 dev_printk(KERN_ERR, host->dev,
6558 "BUG: trying to register unstarted host\n");
6559 WARN_ON(1);
6560 return -EINVAL;
Alan Cox02f076a2006-09-26 17:35:32 +01006561 }
Tejun Heof0d36ef2007-01-20 16:00:28 +09006562
Tejun Heof3187192007-04-17 23:44:07 +09006563 /* Blow away unused ports. This happens when LLD can't
6564 * determine the exact number of ports to allocate at
6565 * allocation time.
6566 */
6567 for (i = host->n_ports; host->ports[i]; i++)
6568 kfree(host->ports[i]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006569
Tejun Heof3187192007-04-17 23:44:07 +09006570 /* give ports names and add SCSI hosts */
6571 for (i = 0; i < host->n_ports; i++)
6572 host->ports[i]->print_id = ata_print_id++;
Tejun Heof0d36ef2007-01-20 16:00:28 +09006573
Tejun Heof3187192007-04-17 23:44:07 +09006574 rc = ata_scsi_add_hosts(host, sht);
Tejun Heoecef7252007-04-17 23:44:06 +09006575 if (rc)
Tejun Heof3187192007-04-17 23:44:07 +09006576 return rc;
Tejun Heoecef7252007-04-17 23:44:06 +09006577
Tejun Heofafbae82007-05-15 03:28:16 +09006578 /* associate with ACPI nodes */
6579 ata_acpi_associate(host);
6580
Tejun Heof3187192007-04-17 23:44:07 +09006581 /* set cable, sata_spd_limit and report */
Jeff Garzikcca39742006-08-24 03:19:22 -04006582 for (i = 0; i < host->n_ports; i++) {
6583 struct ata_port *ap = host->ports[i];
Tejun Heof3187192007-04-17 23:44:07 +09006584 unsigned long xfer_mask;
6585
6586 /* set SATA cable type if still unset */
6587 if (ap->cbl == ATA_CBL_NONE && (ap->flags & ATA_FLAG_SATA))
6588 ap->cbl = ATA_CBL_SATA;
Linus Torvalds1da177e2005-04-16 15:20:36 -07006589
Tejun Heo5a04bf42006-05-31 18:27:38 +09006590 /* init sata_spd_limit to the current value */
Tejun Heo4fb37a22007-08-06 18:36:23 +09006591 sata_link_init_spd(&ap->link);
Tejun Heo5a04bf42006-05-31 18:27:38 +09006592
Tejun Heocbcdd872007-08-18 13:14:55 +09006593 /* print per-port info to dmesg */
Tejun Heof3187192007-04-17 23:44:07 +09006594 xfer_mask = ata_pack_xfermask(ap->pio_mask, ap->mwdma_mask,
6595 ap->udma_mask);
6596
Tejun Heof3187192007-04-17 23:44:07 +09006597 if (!ata_port_is_dummy(ap))
Tejun Heocbcdd872007-08-18 13:14:55 +09006598 ata_port_printk(ap, KERN_INFO,
6599 "%cATA max %s %s\n",
Tejun Heoa16abc02007-05-21 18:33:47 +02006600 (ap->flags & ATA_FLAG_SATA) ? 'S' : 'P',
Tejun Heof3187192007-04-17 23:44:07 +09006601 ata_mode_string(xfer_mask),
Tejun Heocbcdd872007-08-18 13:14:55 +09006602 ap->link.eh_info.desc);
Tejun Heof3187192007-04-17 23:44:07 +09006603 else
6604 ata_port_printk(ap, KERN_INFO, "DUMMY\n");
6605 }
6606
6607 /* perform each probe synchronously */
6608 DPRINTK("probe begin\n");
6609 for (i = 0; i < host->n_ports; i++) {
6610 struct ata_port *ap = host->ports[i];
6611 int rc;
6612
6613 /* probe */
Tejun Heo52783c52006-05-31 18:28:22 +09006614 if (ap->ops->error_handler) {
Tejun Heo9af5c9c2007-08-06 18:36:22 +09006615 struct ata_eh_info *ehi = &ap->link.eh_info;
Tejun Heo3e706392006-05-31 18:28:11 +09006616 unsigned long flags;
6617
6618 ata_port_probe(ap);
6619
6620 /* kick EH for boot probing */
Jeff Garzikba6a1302006-06-22 23:46:10 -04006621 spin_lock_irqsave(ap->lock, flags);
Tejun Heo3e706392006-05-31 18:28:11 +09006622
Tejun Heof58229f2007-08-06 18:36:23 +09006623 ehi->probe_mask =
6624 (1 << ata_link_max_devices(&ap->link)) - 1;
Tejun Heo1cdaf532006-07-03 16:07:26 +09006625 ehi->action |= ATA_EH_SOFTRESET;
6626 ehi->flags |= ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET;
Tejun Heo3e706392006-05-31 18:28:11 +09006627
Tejun Heof4d6d002007-05-01 11:50:15 +02006628 ap->pflags &= ~ATA_PFLAG_INITIALIZING;
Tejun Heob51e9e52006-06-29 01:29:30 +09006629 ap->pflags |= ATA_PFLAG_LOADING;
Tejun Heo3e706392006-05-31 18:28:11 +09006630 ata_port_schedule_eh(ap);
6631
Jeff Garzikba6a1302006-06-22 23:46:10 -04006632 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heo3e706392006-05-31 18:28:11 +09006633
6634 /* wait for EH to finish */
6635 ata_port_wait_eh(ap);
6636 } else {
Tejun Heo44877b42007-02-21 01:06:51 +09006637 DPRINTK("ata%u: bus probe begin\n", ap->print_id);
Tejun Heo3e706392006-05-31 18:28:11 +09006638 rc = ata_bus_probe(ap);
Tejun Heo44877b42007-02-21 01:06:51 +09006639 DPRINTK("ata%u: bus probe end\n", ap->print_id);
Tejun Heo3e706392006-05-31 18:28:11 +09006640
6641 if (rc) {
6642 /* FIXME: do something useful here?
6643 * Current libata behavior will
6644 * tear down everything when
6645 * the module is removed
6646 * or the h/w is unplugged.
6647 */
6648 }
6649 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07006650 }
6651
6652 /* probes are done, now scan each port's disk(s) */
Randy Dunlapc893a3a2006-01-28 13:15:32 -05006653 DPRINTK("host probe begin\n");
Jeff Garzikcca39742006-08-24 03:19:22 -04006654 for (i = 0; i < host->n_ports; i++) {
6655 struct ata_port *ap = host->ports[i];
Linus Torvalds1da177e2005-04-16 15:20:36 -07006656
Tejun Heo1ae46312007-07-16 14:29:40 +09006657 ata_scsi_scan_host(ap, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006658 }
6659
Tejun Heof3187192007-04-17 23:44:07 +09006660 return 0;
6661}
6662
6663/**
Tejun Heof5cda252007-04-17 23:44:07 +09006664 * ata_host_activate - start host, request IRQ and register it
6665 * @host: target ATA host
6666 * @irq: IRQ to request
6667 * @irq_handler: irq_handler used when requesting IRQ
6668 * @irq_flags: irq_flags used when requesting IRQ
6669 * @sht: scsi_host_template to use when registering the host
6670 *
6671 * After allocating an ATA host and initializing it, most libata
6672 * LLDs perform three steps to activate the host - start host,
6673 * request IRQ and register it. This helper takes necessasry
6674 * arguments and performs the three steps in one go.
6675 *
6676 * LOCKING:
6677 * Inherited from calling layer (may sleep).
6678 *
6679 * RETURNS:
6680 * 0 on success, -errno otherwise.
6681 */
6682int ata_host_activate(struct ata_host *host, int irq,
6683 irq_handler_t irq_handler, unsigned long irq_flags,
6684 struct scsi_host_template *sht)
6685{
Tejun Heocbcdd872007-08-18 13:14:55 +09006686 int i, rc;
Tejun Heof5cda252007-04-17 23:44:07 +09006687
6688 rc = ata_host_start(host);
6689 if (rc)
6690 return rc;
6691
6692 rc = devm_request_irq(host->dev, irq, irq_handler, irq_flags,
6693 dev_driver_string(host->dev), host);
6694 if (rc)
6695 return rc;
6696
Tejun Heocbcdd872007-08-18 13:14:55 +09006697 for (i = 0; i < host->n_ports; i++)
6698 ata_port_desc(host->ports[i], "irq %d", irq);
Tejun Heo40318262007-07-03 01:38:47 +09006699
Tejun Heof5cda252007-04-17 23:44:07 +09006700 rc = ata_host_register(host, sht);
6701 /* if failed, just free the IRQ and leave ports alone */
6702 if (rc)
6703 devm_free_irq(host->dev, irq, host);
6704
6705 return rc;
6706}
6707
6708/**
Tejun Heo720ba122006-05-31 18:28:13 +09006709 * ata_port_detach - Detach ATA port in prepration of device removal
6710 * @ap: ATA port to be detached
6711 *
6712 * Detach all ATA devices and the associated SCSI devices of @ap;
6713 * then, remove the associated SCSI host. @ap is guaranteed to
6714 * be quiescent on return from this function.
6715 *
6716 * LOCKING:
6717 * Kernel thread context (may sleep).
6718 */
6719void ata_port_detach(struct ata_port *ap)
6720{
6721 unsigned long flags;
Tejun Heo41bda9c2007-08-06 18:36:24 +09006722 struct ata_link *link;
Tejun Heof58229f2007-08-06 18:36:23 +09006723 struct ata_device *dev;
Tejun Heo720ba122006-05-31 18:28:13 +09006724
6725 if (!ap->ops->error_handler)
Tejun Heoc3cf30a2006-08-05 03:59:11 +09006726 goto skip_eh;
Tejun Heo720ba122006-05-31 18:28:13 +09006727
6728 /* tell EH we're leaving & flush EH */
Jeff Garzikba6a1302006-06-22 23:46:10 -04006729 spin_lock_irqsave(ap->lock, flags);
Tejun Heob51e9e52006-06-29 01:29:30 +09006730 ap->pflags |= ATA_PFLAG_UNLOADING;
Jeff Garzikba6a1302006-06-22 23:46:10 -04006731 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heo720ba122006-05-31 18:28:13 +09006732
6733 ata_port_wait_eh(ap);
6734
6735 /* EH is now guaranteed to see UNLOADING, so no new device
6736 * will be attached. Disable all existing devices.
6737 */
Jeff Garzikba6a1302006-06-22 23:46:10 -04006738 spin_lock_irqsave(ap->lock, flags);
Tejun Heo720ba122006-05-31 18:28:13 +09006739
Tejun Heo41bda9c2007-08-06 18:36:24 +09006740 ata_port_for_each_link(link, ap) {
6741 ata_link_for_each_dev(dev, link)
6742 ata_dev_disable(dev);
6743 }
Tejun Heo720ba122006-05-31 18:28:13 +09006744
Jeff Garzikba6a1302006-06-22 23:46:10 -04006745 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heo720ba122006-05-31 18:28:13 +09006746
6747 /* Final freeze & EH. All in-flight commands are aborted. EH
6748 * will be skipped and retrials will be terminated with bad
6749 * target.
6750 */
Jeff Garzikba6a1302006-06-22 23:46:10 -04006751 spin_lock_irqsave(ap->lock, flags);
Tejun Heo720ba122006-05-31 18:28:13 +09006752 ata_port_freeze(ap); /* won't be thawed */
Jeff Garzikba6a1302006-06-22 23:46:10 -04006753 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heo720ba122006-05-31 18:28:13 +09006754
6755 ata_port_wait_eh(ap);
Oleg Nesterov45a66c12007-07-09 11:46:13 -07006756 cancel_rearming_delayed_work(&ap->hotplug_task);
Tejun Heo720ba122006-05-31 18:28:13 +09006757
Tejun Heoc3cf30a2006-08-05 03:59:11 +09006758 skip_eh:
Tejun Heo720ba122006-05-31 18:28:13 +09006759 /* remove the associated SCSI host */
Jeff Garzikcca39742006-08-24 03:19:22 -04006760 scsi_remove_host(ap->scsi_host);
Tejun Heo720ba122006-05-31 18:28:13 +09006761}
6762
6763/**
Tejun Heo0529c1592007-01-20 16:00:26 +09006764 * ata_host_detach - Detach all ports of an ATA host
6765 * @host: Host to detach
6766 *
6767 * Detach all ports of @host.
6768 *
6769 * LOCKING:
6770 * Kernel thread context (may sleep).
6771 */
6772void ata_host_detach(struct ata_host *host)
6773{
6774 int i;
6775
6776 for (i = 0; i < host->n_ports; i++)
6777 ata_port_detach(host->ports[i]);
6778}
6779
Linus Torvalds1da177e2005-04-16 15:20:36 -07006780/**
6781 * ata_std_ports - initialize ioaddr with standard port offsets.
6782 * @ioaddr: IO address structure to be initialized
Edward Falk0baab862005-06-02 18:17:13 -04006783 *
6784 * Utility function which initializes data_addr, error_addr,
6785 * feature_addr, nsect_addr, lbal_addr, lbam_addr, lbah_addr,
6786 * device_addr, status_addr, and command_addr to standard offsets
6787 * relative to cmd_addr.
6788 *
6789 * Does not set ctl_addr, altstatus_addr, bmdma_addr, or scr_addr.
Linus Torvalds1da177e2005-04-16 15:20:36 -07006790 */
Edward Falk0baab862005-06-02 18:17:13 -04006791
Linus Torvalds1da177e2005-04-16 15:20:36 -07006792void ata_std_ports(struct ata_ioports *ioaddr)
6793{
6794 ioaddr->data_addr = ioaddr->cmd_addr + ATA_REG_DATA;
6795 ioaddr->error_addr = ioaddr->cmd_addr + ATA_REG_ERR;
6796 ioaddr->feature_addr = ioaddr->cmd_addr + ATA_REG_FEATURE;
6797 ioaddr->nsect_addr = ioaddr->cmd_addr + ATA_REG_NSECT;
6798 ioaddr->lbal_addr = ioaddr->cmd_addr + ATA_REG_LBAL;
6799 ioaddr->lbam_addr = ioaddr->cmd_addr + ATA_REG_LBAM;
6800 ioaddr->lbah_addr = ioaddr->cmd_addr + ATA_REG_LBAH;
6801 ioaddr->device_addr = ioaddr->cmd_addr + ATA_REG_DEVICE;
6802 ioaddr->status_addr = ioaddr->cmd_addr + ATA_REG_STATUS;
6803 ioaddr->command_addr = ioaddr->cmd_addr + ATA_REG_CMD;
6804}
6805
Edward Falk0baab862005-06-02 18:17:13 -04006806
Jeff Garzik374b1872005-08-30 05:42:52 -04006807#ifdef CONFIG_PCI
6808
Edward Falk0baab862005-06-02 18:17:13 -04006809/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07006810 * ata_pci_remove_one - PCI layer callback for device removal
6811 * @pdev: PCI device that was removed
6812 *
Tejun Heob878ca52007-01-20 16:00:28 +09006813 * PCI layer indicates to libata via this hook that hot-unplug or
6814 * module unload event has occurred. Detach all ports. Resource
6815 * release is handled via devres.
Linus Torvalds1da177e2005-04-16 15:20:36 -07006816 *
6817 * LOCKING:
6818 * Inherited from PCI layer (may sleep).
6819 */
Tejun Heof0d36ef2007-01-20 16:00:28 +09006820void ata_pci_remove_one(struct pci_dev *pdev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07006821{
6822 struct device *dev = pci_dev_to_dev(pdev);
Jeff Garzikcca39742006-08-24 03:19:22 -04006823 struct ata_host *host = dev_get_drvdata(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006824
Tejun Heob878ca52007-01-20 16:00:28 +09006825 ata_host_detach(host);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006826}
6827
6828/* move to PCI subsystem */
Jeff Garzik057ace52005-10-22 14:27:05 -04006829int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits)
Linus Torvalds1da177e2005-04-16 15:20:36 -07006830{
6831 unsigned long tmp = 0;
6832
6833 switch (bits->width) {
6834 case 1: {
6835 u8 tmp8 = 0;
6836 pci_read_config_byte(pdev, bits->reg, &tmp8);
6837 tmp = tmp8;
6838 break;
6839 }
6840 case 2: {
6841 u16 tmp16 = 0;
6842 pci_read_config_word(pdev, bits->reg, &tmp16);
6843 tmp = tmp16;
6844 break;
6845 }
6846 case 4: {
6847 u32 tmp32 = 0;
6848 pci_read_config_dword(pdev, bits->reg, &tmp32);
6849 tmp = tmp32;
6850 break;
6851 }
6852
6853 default:
6854 return -EINVAL;
6855 }
6856
6857 tmp &= bits->mask;
6858
6859 return (tmp == bits->val) ? 1 : 0;
6860}
Jens Axboe9b847542006-01-06 09:28:07 +01006861
Tejun Heo6ffa01d2007-03-02 17:32:47 +09006862#ifdef CONFIG_PM
Tejun Heo3c5100c2006-07-26 16:58:33 +09006863void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg)
Jens Axboe9b847542006-01-06 09:28:07 +01006864{
6865 pci_save_state(pdev);
Tejun Heo4c90d972007-02-20 18:14:48 +09006866 pci_disable_device(pdev);
Tejun Heo500530f2006-07-03 16:07:27 +09006867
Tejun Heo4c90d972007-02-20 18:14:48 +09006868 if (mesg.event == PM_EVENT_SUSPEND)
Tejun Heo500530f2006-07-03 16:07:27 +09006869 pci_set_power_state(pdev, PCI_D3hot);
Jens Axboe9b847542006-01-06 09:28:07 +01006870}
6871
Tejun Heo553c4aa2006-12-26 19:39:50 +09006872int ata_pci_device_do_resume(struct pci_dev *pdev)
Jens Axboe9b847542006-01-06 09:28:07 +01006873{
Tejun Heo553c4aa2006-12-26 19:39:50 +09006874 int rc;
6875
Jens Axboe9b847542006-01-06 09:28:07 +01006876 pci_set_power_state(pdev, PCI_D0);
6877 pci_restore_state(pdev);
Tejun Heo553c4aa2006-12-26 19:39:50 +09006878
Tejun Heob878ca52007-01-20 16:00:28 +09006879 rc = pcim_enable_device(pdev);
Tejun Heo553c4aa2006-12-26 19:39:50 +09006880 if (rc) {
6881 dev_printk(KERN_ERR, &pdev->dev,
6882 "failed to enable device after resume (%d)\n", rc);
6883 return rc;
6884 }
6885
Jens Axboe9b847542006-01-06 09:28:07 +01006886 pci_set_master(pdev);
Tejun Heo553c4aa2006-12-26 19:39:50 +09006887 return 0;
Tejun Heo500530f2006-07-03 16:07:27 +09006888}
6889
Tejun Heo3c5100c2006-07-26 16:58:33 +09006890int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg)
Tejun Heo500530f2006-07-03 16:07:27 +09006891{
Jeff Garzikcca39742006-08-24 03:19:22 -04006892 struct ata_host *host = dev_get_drvdata(&pdev->dev);
Tejun Heo500530f2006-07-03 16:07:27 +09006893 int rc = 0;
6894
Jeff Garzikcca39742006-08-24 03:19:22 -04006895 rc = ata_host_suspend(host, mesg);
Tejun Heo500530f2006-07-03 16:07:27 +09006896 if (rc)
6897 return rc;
6898
Tejun Heo3c5100c2006-07-26 16:58:33 +09006899 ata_pci_device_do_suspend(pdev, mesg);
Tejun Heo500530f2006-07-03 16:07:27 +09006900
6901 return 0;
6902}
6903
6904int ata_pci_device_resume(struct pci_dev *pdev)
6905{
Jeff Garzikcca39742006-08-24 03:19:22 -04006906 struct ata_host *host = dev_get_drvdata(&pdev->dev);
Tejun Heo553c4aa2006-12-26 19:39:50 +09006907 int rc;
Tejun Heo500530f2006-07-03 16:07:27 +09006908
Tejun Heo553c4aa2006-12-26 19:39:50 +09006909 rc = ata_pci_device_do_resume(pdev);
6910 if (rc == 0)
6911 ata_host_resume(host);
6912 return rc;
Jens Axboe9b847542006-01-06 09:28:07 +01006913}
Tejun Heo6ffa01d2007-03-02 17:32:47 +09006914#endif /* CONFIG_PM */
6915
Linus Torvalds1da177e2005-04-16 15:20:36 -07006916#endif /* CONFIG_PCI */
6917
6918
Linus Torvalds1da177e2005-04-16 15:20:36 -07006919static int __init ata_init(void)
6920{
Andrew Mortona8601e52006-06-25 01:36:52 -07006921 ata_probe_timeout *= HZ;
Linus Torvalds1da177e2005-04-16 15:20:36 -07006922 ata_wq = create_workqueue("ata");
6923 if (!ata_wq)
6924 return -ENOMEM;
6925
Tejun Heo453b07a2006-05-31 18:27:42 +09006926 ata_aux_wq = create_singlethread_workqueue("ata_aux");
6927 if (!ata_aux_wq) {
6928 destroy_workqueue(ata_wq);
6929 return -ENOMEM;
6930 }
6931
Linus Torvalds1da177e2005-04-16 15:20:36 -07006932 printk(KERN_DEBUG "libata version " DRV_VERSION " loaded.\n");
6933 return 0;
6934}
6935
6936static void __exit ata_exit(void)
6937{
6938 destroy_workqueue(ata_wq);
Tejun Heo453b07a2006-05-31 18:27:42 +09006939 destroy_workqueue(ata_aux_wq);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006940}
6941
Brian Kinga4625082006-11-13 16:32:36 -06006942subsys_initcall(ata_init);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006943module_exit(ata_exit);
6944
Jeff Garzik67846b32005-10-05 02:58:32 -04006945static unsigned long ratelimit_time;
Ingo Molnar34af9462006-06-27 02:53:55 -07006946static DEFINE_SPINLOCK(ata_ratelimit_lock);
Jeff Garzik67846b32005-10-05 02:58:32 -04006947
6948int ata_ratelimit(void)
6949{
6950 int rc;
6951 unsigned long flags;
6952
6953 spin_lock_irqsave(&ata_ratelimit_lock, flags);
6954
6955 if (time_after(jiffies, ratelimit_time)) {
6956 rc = 1;
6957 ratelimit_time = jiffies + (HZ/5);
6958 } else
6959 rc = 0;
6960
6961 spin_unlock_irqrestore(&ata_ratelimit_lock, flags);
6962
6963 return rc;
6964}
6965
Tejun Heoc22daff2006-04-11 22:22:29 +09006966/**
6967 * ata_wait_register - wait until register value changes
6968 * @reg: IO-mapped register
6969 * @mask: Mask to apply to read register value
6970 * @val: Wait condition
6971 * @interval_msec: polling interval in milliseconds
6972 * @timeout_msec: timeout in milliseconds
6973 *
6974 * Waiting for some bits of register to change is a common
6975 * operation for ATA controllers. This function reads 32bit LE
6976 * IO-mapped register @reg and tests for the following condition.
6977 *
6978 * (*@reg & mask) != val
6979 *
6980 * If the condition is met, it returns; otherwise, the process is
6981 * repeated after @interval_msec until timeout.
6982 *
6983 * LOCKING:
6984 * Kernel thread context (may sleep)
6985 *
6986 * RETURNS:
6987 * The final register value.
6988 */
6989u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val,
6990 unsigned long interval_msec,
6991 unsigned long timeout_msec)
6992{
6993 unsigned long timeout;
6994 u32 tmp;
6995
6996 tmp = ioread32(reg);
6997
6998 /* Calculate timeout _after_ the first read to make sure
6999 * preceding writes reach the controller before starting to
7000 * eat away the timeout.
7001 */
7002 timeout = jiffies + (timeout_msec * HZ) / 1000;
7003
7004 while ((tmp & mask) == val && time_before(jiffies, timeout)) {
7005 msleep(interval_msec);
7006 tmp = ioread32(reg);
7007 }
7008
7009 return tmp;
7010}
7011
Linus Torvalds1da177e2005-04-16 15:20:36 -07007012/*
Tejun Heodd5b06c2006-08-10 16:59:12 +09007013 * Dummy port_ops
7014 */
7015static void ata_dummy_noret(struct ata_port *ap) { }
7016static int ata_dummy_ret0(struct ata_port *ap) { return 0; }
7017static void ata_dummy_qc_noret(struct ata_queued_cmd *qc) { }
7018
7019static u8 ata_dummy_check_status(struct ata_port *ap)
7020{
7021 return ATA_DRDY;
7022}
7023
7024static unsigned int ata_dummy_qc_issue(struct ata_queued_cmd *qc)
7025{
7026 return AC_ERR_SYSTEM;
7027}
7028
7029const struct ata_port_operations ata_dummy_port_ops = {
Tejun Heodd5b06c2006-08-10 16:59:12 +09007030 .check_status = ata_dummy_check_status,
7031 .check_altstatus = ata_dummy_check_status,
7032 .dev_select = ata_noop_dev_select,
7033 .qc_prep = ata_noop_qc_prep,
7034 .qc_issue = ata_dummy_qc_issue,
7035 .freeze = ata_dummy_noret,
7036 .thaw = ata_dummy_noret,
7037 .error_handler = ata_dummy_noret,
7038 .post_internal_cmd = ata_dummy_qc_noret,
7039 .irq_clear = ata_dummy_noret,
7040 .port_start = ata_dummy_ret0,
7041 .port_stop = ata_dummy_noret,
7042};
7043
Tejun Heo21b0ad42007-04-17 23:44:07 +09007044const struct ata_port_info ata_dummy_port_info = {
7045 .port_ops = &ata_dummy_port_ops,
7046};
7047
Tejun Heodd5b06c2006-08-10 16:59:12 +09007048/*
Linus Torvalds1da177e2005-04-16 15:20:36 -07007049 * libata is essentially a library of internal helper functions for
7050 * low-level ATA host controller drivers. As such, the API/ABI is
7051 * likely to change as new drivers are added and updated.
7052 * Do not depend on ABI/API stability.
7053 */
7054
Tejun Heoe9c83912006-07-03 16:07:26 +09007055EXPORT_SYMBOL_GPL(sata_deb_timing_normal);
7056EXPORT_SYMBOL_GPL(sata_deb_timing_hotplug);
7057EXPORT_SYMBOL_GPL(sata_deb_timing_long);
Tejun Heodd5b06c2006-08-10 16:59:12 +09007058EXPORT_SYMBOL_GPL(ata_dummy_port_ops);
Tejun Heo21b0ad42007-04-17 23:44:07 +09007059EXPORT_SYMBOL_GPL(ata_dummy_port_info);
Linus Torvalds1da177e2005-04-16 15:20:36 -07007060EXPORT_SYMBOL_GPL(ata_std_bios_param);
7061EXPORT_SYMBOL_GPL(ata_std_ports);
Jeff Garzikcca39742006-08-24 03:19:22 -04007062EXPORT_SYMBOL_GPL(ata_host_init);
Tejun Heof3187192007-04-17 23:44:07 +09007063EXPORT_SYMBOL_GPL(ata_host_alloc);
Tejun Heof5cda252007-04-17 23:44:07 +09007064EXPORT_SYMBOL_GPL(ata_host_alloc_pinfo);
Tejun Heoecef7252007-04-17 23:44:06 +09007065EXPORT_SYMBOL_GPL(ata_host_start);
Tejun Heof3187192007-04-17 23:44:07 +09007066EXPORT_SYMBOL_GPL(ata_host_register);
Tejun Heof5cda252007-04-17 23:44:07 +09007067EXPORT_SYMBOL_GPL(ata_host_activate);
Tejun Heo0529c1592007-01-20 16:00:26 +09007068EXPORT_SYMBOL_GPL(ata_host_detach);
Linus Torvalds1da177e2005-04-16 15:20:36 -07007069EXPORT_SYMBOL_GPL(ata_sg_init);
7070EXPORT_SYMBOL_GPL(ata_sg_init_one);
Tejun Heo9a1004d2006-05-31 18:27:52 +09007071EXPORT_SYMBOL_GPL(ata_hsm_move);
Tejun Heof686bcb2006-05-15 20:58:05 +09007072EXPORT_SYMBOL_GPL(ata_qc_complete);
Tejun Heodedaf2b2006-05-15 21:03:43 +09007073EXPORT_SYMBOL_GPL(ata_qc_complete_multiple);
Linus Torvalds1da177e2005-04-16 15:20:36 -07007074EXPORT_SYMBOL_GPL(ata_qc_issue_prot);
Linus Torvalds1da177e2005-04-16 15:20:36 -07007075EXPORT_SYMBOL_GPL(ata_tf_load);
7076EXPORT_SYMBOL_GPL(ata_tf_read);
7077EXPORT_SYMBOL_GPL(ata_noop_dev_select);
7078EXPORT_SYMBOL_GPL(ata_std_dev_select);
Jeff Garzik43727fb2007-02-25 16:50:52 -05007079EXPORT_SYMBOL_GPL(sata_print_link_status);
Linus Torvalds1da177e2005-04-16 15:20:36 -07007080EXPORT_SYMBOL_GPL(ata_tf_to_fis);
7081EXPORT_SYMBOL_GPL(ata_tf_from_fis);
7082EXPORT_SYMBOL_GPL(ata_check_status);
7083EXPORT_SYMBOL_GPL(ata_altstatus);
Linus Torvalds1da177e2005-04-16 15:20:36 -07007084EXPORT_SYMBOL_GPL(ata_exec_command);
7085EXPORT_SYMBOL_GPL(ata_port_start);
Alan Coxd92e74d2007-06-07 16:19:15 +01007086EXPORT_SYMBOL_GPL(ata_sff_port_start);
Linus Torvalds1da177e2005-04-16 15:20:36 -07007087EXPORT_SYMBOL_GPL(ata_interrupt);
Alan04351822007-03-06 02:37:52 -08007088EXPORT_SYMBOL_GPL(ata_do_set_mode);
Tejun Heo0d5ff562007-02-01 15:06:36 +09007089EXPORT_SYMBOL_GPL(ata_data_xfer);
7090EXPORT_SYMBOL_GPL(ata_data_xfer_noirq);
Linus Torvalds1da177e2005-04-16 15:20:36 -07007091EXPORT_SYMBOL_GPL(ata_qc_prep);
Alan Coxd26fc952007-07-06 19:13:52 -04007092EXPORT_SYMBOL_GPL(ata_dumb_qc_prep);
Brian Kinge46834c2006-03-17 17:04:03 -06007093EXPORT_SYMBOL_GPL(ata_noop_qc_prep);
Linus Torvalds1da177e2005-04-16 15:20:36 -07007094EXPORT_SYMBOL_GPL(ata_bmdma_setup);
7095EXPORT_SYMBOL_GPL(ata_bmdma_start);
7096EXPORT_SYMBOL_GPL(ata_bmdma_irq_clear);
7097EXPORT_SYMBOL_GPL(ata_bmdma_status);
7098EXPORT_SYMBOL_GPL(ata_bmdma_stop);
Tejun Heo6d97dbd2006-05-15 20:58:24 +09007099EXPORT_SYMBOL_GPL(ata_bmdma_freeze);
7100EXPORT_SYMBOL_GPL(ata_bmdma_thaw);
7101EXPORT_SYMBOL_GPL(ata_bmdma_drive_eh);
7102EXPORT_SYMBOL_GPL(ata_bmdma_error_handler);
7103EXPORT_SYMBOL_GPL(ata_bmdma_post_internal_cmd);
Linus Torvalds1da177e2005-04-16 15:20:36 -07007104EXPORT_SYMBOL_GPL(ata_port_probe);
Alan10305f02007-02-20 18:01:59 +00007105EXPORT_SYMBOL_GPL(ata_dev_disable);
Tejun Heo3c567b72006-05-15 20:57:23 +09007106EXPORT_SYMBOL_GPL(sata_set_spd);
Tejun Heo936fd732007-08-06 18:36:23 +09007107EXPORT_SYMBOL_GPL(sata_link_debounce);
7108EXPORT_SYMBOL_GPL(sata_link_resume);
Linus Torvalds1da177e2005-04-16 15:20:36 -07007109EXPORT_SYMBOL_GPL(sata_phy_reset);
7110EXPORT_SYMBOL_GPL(__sata_phy_reset);
7111EXPORT_SYMBOL_GPL(ata_bus_reset);
Tejun Heof5914a42006-05-31 18:27:48 +09007112EXPORT_SYMBOL_GPL(ata_std_prereset);
Tejun Heoc2bd5802006-01-24 17:05:22 +09007113EXPORT_SYMBOL_GPL(ata_std_softreset);
Tejun Heocc0680a2007-08-06 18:36:23 +09007114EXPORT_SYMBOL_GPL(sata_link_hardreset);
Tejun Heoc2bd5802006-01-24 17:05:22 +09007115EXPORT_SYMBOL_GPL(sata_std_hardreset);
7116EXPORT_SYMBOL_GPL(ata_std_postreset);
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05007117EXPORT_SYMBOL_GPL(ata_dev_classify);
7118EXPORT_SYMBOL_GPL(ata_dev_pair);
Linus Torvalds1da177e2005-04-16 15:20:36 -07007119EXPORT_SYMBOL_GPL(ata_port_disable);
Jeff Garzik67846b32005-10-05 02:58:32 -04007120EXPORT_SYMBOL_GPL(ata_ratelimit);
Tejun Heoc22daff2006-04-11 22:22:29 +09007121EXPORT_SYMBOL_GPL(ata_wait_register);
Tejun Heo6f8b9952006-01-24 17:05:21 +09007122EXPORT_SYMBOL_GPL(ata_busy_sleep);
Tejun Heod4b2bab2007-02-02 16:50:52 +09007123EXPORT_SYMBOL_GPL(ata_wait_ready);
Tejun Heo86e45b62006-03-05 15:29:09 +09007124EXPORT_SYMBOL_GPL(ata_port_queue_task);
Linus Torvalds1da177e2005-04-16 15:20:36 -07007125EXPORT_SYMBOL_GPL(ata_scsi_ioctl);
7126EXPORT_SYMBOL_GPL(ata_scsi_queuecmd);
Linus Torvalds1da177e2005-04-16 15:20:36 -07007127EXPORT_SYMBOL_GPL(ata_scsi_slave_config);
Tejun Heo83c47bc2006-05-31 18:28:07 +09007128EXPORT_SYMBOL_GPL(ata_scsi_slave_destroy);
Tejun Heoa6e6ce82006-05-15 21:03:48 +09007129EXPORT_SYMBOL_GPL(ata_scsi_change_queue_depth);
Linus Torvalds1da177e2005-04-16 15:20:36 -07007130EXPORT_SYMBOL_GPL(ata_host_intr);
Tejun Heo34bf2172006-05-15 20:57:46 +09007131EXPORT_SYMBOL_GPL(sata_scr_valid);
7132EXPORT_SYMBOL_GPL(sata_scr_read);
7133EXPORT_SYMBOL_GPL(sata_scr_write);
7134EXPORT_SYMBOL_GPL(sata_scr_write_flush);
Tejun Heo936fd732007-08-06 18:36:23 +09007135EXPORT_SYMBOL_GPL(ata_link_online);
7136EXPORT_SYMBOL_GPL(ata_link_offline);
Tejun Heo6ffa01d2007-03-02 17:32:47 +09007137#ifdef CONFIG_PM
Jeff Garzikcca39742006-08-24 03:19:22 -04007138EXPORT_SYMBOL_GPL(ata_host_suspend);
7139EXPORT_SYMBOL_GPL(ata_host_resume);
Tejun Heo6ffa01d2007-03-02 17:32:47 +09007140#endif /* CONFIG_PM */
Tejun Heo6a62a042006-02-13 10:02:46 +09007141EXPORT_SYMBOL_GPL(ata_id_string);
7142EXPORT_SYMBOL_GPL(ata_id_c_string);
Alan10305f02007-02-20 18:01:59 +00007143EXPORT_SYMBOL_GPL(ata_id_to_dma_mode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07007144EXPORT_SYMBOL_GPL(ata_scsi_simulate);
7145
Alan Cox1bc4ccf2006-01-09 17:18:14 +00007146EXPORT_SYMBOL_GPL(ata_pio_need_iordy);
Alan Cox452503f2005-10-21 19:01:32 -04007147EXPORT_SYMBOL_GPL(ata_timing_compute);
7148EXPORT_SYMBOL_GPL(ata_timing_merge);
7149
Linus Torvalds1da177e2005-04-16 15:20:36 -07007150#ifdef CONFIG_PCI
7151EXPORT_SYMBOL_GPL(pci_test_config_bits);
Tejun Heod583bc12007-07-04 18:02:07 +09007152EXPORT_SYMBOL_GPL(ata_pci_init_sff_host);
Tejun Heo1626aeb2007-05-04 12:43:58 +02007153EXPORT_SYMBOL_GPL(ata_pci_init_bmdma);
Tejun Heod583bc12007-07-04 18:02:07 +09007154EXPORT_SYMBOL_GPL(ata_pci_prepare_sff_host);
Linus Torvalds1da177e2005-04-16 15:20:36 -07007155EXPORT_SYMBOL_GPL(ata_pci_init_one);
7156EXPORT_SYMBOL_GPL(ata_pci_remove_one);
Tejun Heo6ffa01d2007-03-02 17:32:47 +09007157#ifdef CONFIG_PM
Tejun Heo500530f2006-07-03 16:07:27 +09007158EXPORT_SYMBOL_GPL(ata_pci_device_do_suspend);
7159EXPORT_SYMBOL_GPL(ata_pci_device_do_resume);
Jens Axboe9b847542006-01-06 09:28:07 +01007160EXPORT_SYMBOL_GPL(ata_pci_device_suspend);
7161EXPORT_SYMBOL_GPL(ata_pci_device_resume);
Tejun Heo6ffa01d2007-03-02 17:32:47 +09007162#endif /* CONFIG_PM */
Alan Cox67951ad2006-03-22 15:55:54 +00007163EXPORT_SYMBOL_GPL(ata_pci_default_filter);
7164EXPORT_SYMBOL_GPL(ata_pci_clear_simplex);
Linus Torvalds1da177e2005-04-16 15:20:36 -07007165#endif /* CONFIG_PCI */
Jens Axboe9b847542006-01-06 09:28:07 +01007166
Tejun Heob64bbc32007-07-16 14:29:39 +09007167EXPORT_SYMBOL_GPL(__ata_ehi_push_desc);
7168EXPORT_SYMBOL_GPL(ata_ehi_push_desc);
7169EXPORT_SYMBOL_GPL(ata_ehi_clear_desc);
Tejun Heocbcdd872007-08-18 13:14:55 +09007170EXPORT_SYMBOL_GPL(ata_port_desc);
7171#ifdef CONFIG_PCI
7172EXPORT_SYMBOL_GPL(ata_port_pbar_desc);
7173#endif /* CONFIG_PCI */
Tejun Heoece1d632006-04-02 18:51:53 +09007174EXPORT_SYMBOL_GPL(ata_eng_timeout);
Tejun Heo7b70fc02006-05-15 20:58:07 +09007175EXPORT_SYMBOL_GPL(ata_port_schedule_eh);
Tejun Heodbd82612007-08-06 18:36:23 +09007176EXPORT_SYMBOL_GPL(ata_link_abort);
Tejun Heo7b70fc02006-05-15 20:58:07 +09007177EXPORT_SYMBOL_GPL(ata_port_abort);
Tejun Heoe3180492006-05-15 20:58:09 +09007178EXPORT_SYMBOL_GPL(ata_port_freeze);
7179EXPORT_SYMBOL_GPL(ata_eh_freeze_port);
7180EXPORT_SYMBOL_GPL(ata_eh_thaw_port);
Tejun Heoece1d632006-04-02 18:51:53 +09007181EXPORT_SYMBOL_GPL(ata_eh_qc_complete);
7182EXPORT_SYMBOL_GPL(ata_eh_qc_retry);
Tejun Heo022bdb02006-05-15 20:58:22 +09007183EXPORT_SYMBOL_GPL(ata_do_eh);
Akira Iguchi83625002007-01-26 16:27:32 +09007184EXPORT_SYMBOL_GPL(ata_irq_on);
Akira Iguchia619f981b2007-01-26 16:28:18 +09007185EXPORT_SYMBOL_GPL(ata_dev_try_classify);
Alan Coxbe0d18d2007-03-06 02:37:56 -08007186
7187EXPORT_SYMBOL_GPL(ata_cable_40wire);
7188EXPORT_SYMBOL_GPL(ata_cable_80wire);
7189EXPORT_SYMBOL_GPL(ata_cable_unknown);
7190EXPORT_SYMBOL_GPL(ata_cable_sata);