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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 Garzikcb48cab2007-02-26 06:04:24 -050062#define DRV_VERSION "2.20" /* 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);
73static void ata_dev_xfermask(struct ata_device *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -070074
Tejun Heof3187192007-04-17 23:44:07 +090075unsigned int ata_print_id = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -070076static struct workqueue_struct *ata_wq;
77
Tejun Heo453b07a2006-05-31 18:27:42 +090078struct workqueue_struct *ata_aux_wq;
79
Jeff Garzik418dc1f2006-03-11 20:50:08 -050080int atapi_enabled = 1;
Jeff Garzik1623c812005-08-30 03:37:42 -040081module_param(atapi_enabled, int, 0444);
82MODULE_PARM_DESC(atapi_enabled, "Enable discovery of ATAPI devices (0=off, 1=on)");
83
Albert Lee95de7192006-04-04 10:57:18 +080084int atapi_dmadir = 0;
85module_param(atapi_dmadir, int, 0444);
86MODULE_PARM_DESC(atapi_dmadir, "Enable ATAPI DMADIR bridge support (0=off, 1=on)");
87
Jeff Garzikc3c013a2006-02-27 22:31:19 -050088int libata_fua = 0;
89module_param_named(fua, libata_fua, int, 0444);
90MODULE_PARM_DESC(fua, "FUA support (0=off, 1=on)");
91
Andrew Mortona8601e52006-06-25 01:36:52 -070092static int ata_probe_timeout = ATA_TMOUT_INTERNAL / HZ;
93module_param(ata_probe_timeout, int, 0444);
94MODULE_PARM_DESC(ata_probe_timeout, "Set ATA probing timeout (seconds)");
95
Jeff Garzikd7d0dad2007-03-28 01:57:37 -040096int libata_noacpi = 1;
97module_param_named(noacpi, libata_noacpi, int, 0444);
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -070098MODULE_PARM_DESC(noacpi, "Disables the use of ACPI in suspend/resume when set");
99
Linus Torvalds1da177e2005-04-16 15:20:36 -0700100MODULE_AUTHOR("Jeff Garzik");
101MODULE_DESCRIPTION("Library module for ATA devices");
102MODULE_LICENSE("GPL");
103MODULE_VERSION(DRV_VERSION);
104
Edward Falk0baab862005-06-02 18:17:13 -0400105
106/**
Linus Torvalds1da177e2005-04-16 15:20:36 -0700107 * ata_tf_to_fis - Convert ATA taskfile to SATA FIS structure
108 * @tf: Taskfile to convert
109 * @fis: Buffer into which data will output
110 * @pmp: Port multiplier port
111 *
112 * Converts a standard ATA taskfile to a Serial ATA
113 * FIS structure (Register - Host to Device).
114 *
115 * LOCKING:
116 * Inherited from caller.
117 */
118
Jeff Garzik057ace52005-10-22 14:27:05 -0400119void ata_tf_to_fis(const struct ata_taskfile *tf, u8 *fis, u8 pmp)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700120{
121 fis[0] = 0x27; /* Register - Host to Device FIS */
122 fis[1] = (pmp & 0xf) | (1 << 7); /* Port multiplier number,
123 bit 7 indicates Command FIS */
124 fis[2] = tf->command;
125 fis[3] = tf->feature;
126
127 fis[4] = tf->lbal;
128 fis[5] = tf->lbam;
129 fis[6] = tf->lbah;
130 fis[7] = tf->device;
131
132 fis[8] = tf->hob_lbal;
133 fis[9] = tf->hob_lbam;
134 fis[10] = tf->hob_lbah;
135 fis[11] = tf->hob_feature;
136
137 fis[12] = tf->nsect;
138 fis[13] = tf->hob_nsect;
139 fis[14] = 0;
140 fis[15] = tf->ctl;
141
142 fis[16] = 0;
143 fis[17] = 0;
144 fis[18] = 0;
145 fis[19] = 0;
146}
147
148/**
149 * ata_tf_from_fis - Convert SATA FIS to ATA taskfile
150 * @fis: Buffer from which data will be input
151 * @tf: Taskfile to output
152 *
Mark Lorde12a1be2005-11-12 18:55:45 -0500153 * Converts a serial ATA FIS structure to a standard ATA taskfile.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700154 *
155 * LOCKING:
156 * Inherited from caller.
157 */
158
Jeff Garzik057ace52005-10-22 14:27:05 -0400159void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700160{
161 tf->command = fis[2]; /* status */
162 tf->feature = fis[3]; /* error */
163
164 tf->lbal = fis[4];
165 tf->lbam = fis[5];
166 tf->lbah = fis[6];
167 tf->device = fis[7];
168
169 tf->hob_lbal = fis[8];
170 tf->hob_lbam = fis[9];
171 tf->hob_lbah = fis[10];
172
173 tf->nsect = fis[12];
174 tf->hob_nsect = fis[13];
175}
176
Albert Lee8cbd6df2005-10-12 15:06:27 +0800177static const u8 ata_rw_cmds[] = {
178 /* pio multi */
179 ATA_CMD_READ_MULTI,
180 ATA_CMD_WRITE_MULTI,
181 ATA_CMD_READ_MULTI_EXT,
182 ATA_CMD_WRITE_MULTI_EXT,
Tejun Heo9a3dccc2006-01-06 09:56:18 +0100183 0,
184 0,
185 0,
186 ATA_CMD_WRITE_MULTI_FUA_EXT,
Albert Lee8cbd6df2005-10-12 15:06:27 +0800187 /* pio */
188 ATA_CMD_PIO_READ,
189 ATA_CMD_PIO_WRITE,
190 ATA_CMD_PIO_READ_EXT,
191 ATA_CMD_PIO_WRITE_EXT,
Tejun Heo9a3dccc2006-01-06 09:56:18 +0100192 0,
193 0,
194 0,
195 0,
Albert Lee8cbd6df2005-10-12 15:06:27 +0800196 /* dma */
197 ATA_CMD_READ,
198 ATA_CMD_WRITE,
199 ATA_CMD_READ_EXT,
Tejun Heo9a3dccc2006-01-06 09:56:18 +0100200 ATA_CMD_WRITE_EXT,
201 0,
202 0,
203 0,
204 ATA_CMD_WRITE_FUA_EXT
Albert Lee8cbd6df2005-10-12 15:06:27 +0800205};
Linus Torvalds1da177e2005-04-16 15:20:36 -0700206
207/**
Albert Lee8cbd6df2005-10-12 15:06:27 +0800208 * ata_rwcmd_protocol - set taskfile r/w commands and protocol
Tejun Heobd056d72006-11-14 22:47:10 +0900209 * @tf: command to examine and configure
210 * @dev: device tf belongs to
Linus Torvalds1da177e2005-04-16 15:20:36 -0700211 *
Jeff Garzik2e9edbf2006-03-24 09:56:57 -0500212 * Examine the device configuration and tf->flags to calculate
Albert Lee8cbd6df2005-10-12 15:06:27 +0800213 * the proper read/write commands and protocol to use.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700214 *
215 * LOCKING:
216 * caller.
217 */
Tejun Heobd056d72006-11-14 22:47:10 +0900218static int ata_rwcmd_protocol(struct ata_taskfile *tf, struct ata_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700219{
Tejun Heo9a3dccc2006-01-06 09:56:18 +0100220 u8 cmd;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700221
Tejun Heo9a3dccc2006-01-06 09:56:18 +0100222 int index, fua, lba48, write;
Jeff Garzik2e9edbf2006-03-24 09:56:57 -0500223
Tejun Heo9a3dccc2006-01-06 09:56:18 +0100224 fua = (tf->flags & ATA_TFLAG_FUA) ? 4 : 0;
Albert Lee8cbd6df2005-10-12 15:06:27 +0800225 lba48 = (tf->flags & ATA_TFLAG_LBA48) ? 2 : 0;
226 write = (tf->flags & ATA_TFLAG_WRITE) ? 1 : 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700227
Albert Lee8cbd6df2005-10-12 15:06:27 +0800228 if (dev->flags & ATA_DFLAG_PIO) {
229 tf->protocol = ATA_PROT_PIO;
Tejun Heo9a3dccc2006-01-06 09:56:18 +0100230 index = dev->multi_count ? 0 : 8;
Tejun Heobd056d72006-11-14 22:47:10 +0900231 } else if (lba48 && (dev->ap->flags & ATA_FLAG_PIO_LBA48)) {
Alan Cox8d238e02006-01-17 20:50:31 +0000232 /* Unable to use DMA due to host limitation */
233 tf->protocol = ATA_PROT_PIO;
Albert Lee0565c262006-02-13 18:55:25 +0800234 index = dev->multi_count ? 0 : 8;
Albert Lee8cbd6df2005-10-12 15:06:27 +0800235 } else {
236 tf->protocol = ATA_PROT_DMA;
Tejun Heo9a3dccc2006-01-06 09:56:18 +0100237 index = 16;
Albert Lee8cbd6df2005-10-12 15:06:27 +0800238 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700239
Tejun Heo9a3dccc2006-01-06 09:56:18 +0100240 cmd = ata_rw_cmds[index + fua + lba48 + write];
241 if (cmd) {
242 tf->command = cmd;
243 return 0;
244 }
245 return -1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700246}
247
Tejun Heocb95d562006-03-06 04:31:56 +0900248/**
Tejun Heo35b649f2006-11-14 22:37:35 +0900249 * ata_tf_read_block - Read block address from ATA taskfile
250 * @tf: ATA taskfile of interest
251 * @dev: ATA device @tf belongs to
252 *
253 * LOCKING:
254 * None.
255 *
256 * Read block address from @tf. This function can handle all
257 * three address formats - LBA, LBA48 and CHS. tf->protocol and
258 * flags select the address format to use.
259 *
260 * RETURNS:
261 * Block address read from @tf.
262 */
263u64 ata_tf_read_block(struct ata_taskfile *tf, struct ata_device *dev)
264{
265 u64 block = 0;
266
267 if (tf->flags & ATA_TFLAG_LBA) {
268 if (tf->flags & ATA_TFLAG_LBA48) {
269 block |= (u64)tf->hob_lbah << 40;
270 block |= (u64)tf->hob_lbam << 32;
271 block |= tf->hob_lbal << 24;
272 } else
273 block |= (tf->device & 0xf) << 24;
274
275 block |= tf->lbah << 16;
276 block |= tf->lbam << 8;
277 block |= tf->lbal;
278 } else {
279 u32 cyl, head, sect;
280
281 cyl = tf->lbam | (tf->lbah << 8);
282 head = tf->device & 0xf;
283 sect = tf->lbal;
284
285 block = (cyl * dev->heads + head) * dev->sectors + sect;
286 }
287
288 return block;
289}
290
291/**
Tejun Heobd056d72006-11-14 22:47:10 +0900292 * ata_build_rw_tf - Build ATA taskfile for given read/write request
293 * @tf: Target ATA taskfile
294 * @dev: ATA device @tf belongs to
295 * @block: Block address
296 * @n_block: Number of blocks
297 * @tf_flags: RW/FUA etc...
298 * @tag: tag
299 *
300 * LOCKING:
301 * None.
302 *
303 * Build ATA taskfile @tf for read/write request described by
304 * @block, @n_block, @tf_flags and @tag on @dev.
305 *
306 * RETURNS:
307 *
308 * 0 on success, -ERANGE if the request is too large for @dev,
309 * -EINVAL if the request is invalid.
310 */
311int ata_build_rw_tf(struct ata_taskfile *tf, struct ata_device *dev,
312 u64 block, u32 n_block, unsigned int tf_flags,
313 unsigned int tag)
314{
315 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
316 tf->flags |= tf_flags;
317
Tejun Heo6d1245b2007-02-20 23:20:27 +0900318 if (ata_ncq_enabled(dev) && likely(tag != ATA_TAG_INTERNAL)) {
Tejun Heobd056d72006-11-14 22:47:10 +0900319 /* yay, NCQ */
320 if (!lba_48_ok(block, n_block))
321 return -ERANGE;
322
323 tf->protocol = ATA_PROT_NCQ;
324 tf->flags |= ATA_TFLAG_LBA | ATA_TFLAG_LBA48;
325
326 if (tf->flags & ATA_TFLAG_WRITE)
327 tf->command = ATA_CMD_FPDMA_WRITE;
328 else
329 tf->command = ATA_CMD_FPDMA_READ;
330
331 tf->nsect = tag << 3;
332 tf->hob_feature = (n_block >> 8) & 0xff;
333 tf->feature = n_block & 0xff;
334
335 tf->hob_lbah = (block >> 40) & 0xff;
336 tf->hob_lbam = (block >> 32) & 0xff;
337 tf->hob_lbal = (block >> 24) & 0xff;
338 tf->lbah = (block >> 16) & 0xff;
339 tf->lbam = (block >> 8) & 0xff;
340 tf->lbal = block & 0xff;
341
342 tf->device = 1 << 6;
343 if (tf->flags & ATA_TFLAG_FUA)
344 tf->device |= 1 << 7;
345 } else if (dev->flags & ATA_DFLAG_LBA) {
346 tf->flags |= ATA_TFLAG_LBA;
347
348 if (lba_28_ok(block, n_block)) {
349 /* use LBA28 */
350 tf->device |= (block >> 24) & 0xf;
351 } else if (lba_48_ok(block, n_block)) {
352 if (!(dev->flags & ATA_DFLAG_LBA48))
353 return -ERANGE;
354
355 /* use LBA48 */
356 tf->flags |= ATA_TFLAG_LBA48;
357
358 tf->hob_nsect = (n_block >> 8) & 0xff;
359
360 tf->hob_lbah = (block >> 40) & 0xff;
361 tf->hob_lbam = (block >> 32) & 0xff;
362 tf->hob_lbal = (block >> 24) & 0xff;
363 } else
364 /* request too large even for LBA48 */
365 return -ERANGE;
366
367 if (unlikely(ata_rwcmd_protocol(tf, dev) < 0))
368 return -EINVAL;
369
370 tf->nsect = n_block & 0xff;
371
372 tf->lbah = (block >> 16) & 0xff;
373 tf->lbam = (block >> 8) & 0xff;
374 tf->lbal = block & 0xff;
375
376 tf->device |= ATA_LBA;
377 } else {
378 /* CHS */
379 u32 sect, head, cyl, track;
380
381 /* The request -may- be too large for CHS addressing. */
382 if (!lba_28_ok(block, n_block))
383 return -ERANGE;
384
385 if (unlikely(ata_rwcmd_protocol(tf, dev) < 0))
386 return -EINVAL;
387
388 /* Convert LBA to CHS */
389 track = (u32)block / dev->sectors;
390 cyl = track / dev->heads;
391 head = track % dev->heads;
392 sect = (u32)block % dev->sectors + 1;
393
394 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
395 (u32)block, track, cyl, head, sect);
396
397 /* Check whether the converted CHS can fit.
398 Cylinder: 0-65535
399 Head: 0-15
400 Sector: 1-255*/
401 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
402 return -ERANGE;
403
404 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
405 tf->lbal = sect;
406 tf->lbam = cyl;
407 tf->lbah = cyl >> 8;
408 tf->device |= head;
409 }
410
411 return 0;
412}
413
414/**
Tejun Heocb95d562006-03-06 04:31:56 +0900415 * ata_pack_xfermask - Pack pio, mwdma and udma masks into xfer_mask
416 * @pio_mask: pio_mask
417 * @mwdma_mask: mwdma_mask
418 * @udma_mask: udma_mask
419 *
420 * Pack @pio_mask, @mwdma_mask and @udma_mask into a single
421 * unsigned int xfer_mask.
422 *
423 * LOCKING:
424 * None.
425 *
426 * RETURNS:
427 * Packed xfer_mask.
428 */
429static unsigned int ata_pack_xfermask(unsigned int pio_mask,
430 unsigned int mwdma_mask,
431 unsigned int udma_mask)
432{
433 return ((pio_mask << ATA_SHIFT_PIO) & ATA_MASK_PIO) |
434 ((mwdma_mask << ATA_SHIFT_MWDMA) & ATA_MASK_MWDMA) |
435 ((udma_mask << ATA_SHIFT_UDMA) & ATA_MASK_UDMA);
436}
437
Tejun Heoc0489e42006-03-24 14:07:49 +0900438/**
439 * ata_unpack_xfermask - Unpack xfer_mask into pio, mwdma and udma masks
440 * @xfer_mask: xfer_mask to unpack
441 * @pio_mask: resulting pio_mask
442 * @mwdma_mask: resulting mwdma_mask
443 * @udma_mask: resulting udma_mask
444 *
445 * Unpack @xfer_mask into @pio_mask, @mwdma_mask and @udma_mask.
446 * Any NULL distination masks will be ignored.
447 */
448static void ata_unpack_xfermask(unsigned int xfer_mask,
449 unsigned int *pio_mask,
450 unsigned int *mwdma_mask,
451 unsigned int *udma_mask)
452{
453 if (pio_mask)
454 *pio_mask = (xfer_mask & ATA_MASK_PIO) >> ATA_SHIFT_PIO;
455 if (mwdma_mask)
456 *mwdma_mask = (xfer_mask & ATA_MASK_MWDMA) >> ATA_SHIFT_MWDMA;
457 if (udma_mask)
458 *udma_mask = (xfer_mask & ATA_MASK_UDMA) >> ATA_SHIFT_UDMA;
459}
460
Tejun Heocb95d562006-03-06 04:31:56 +0900461static const struct ata_xfer_ent {
Tejun Heobe9a50c82006-03-31 22:48:52 +0900462 int shift, bits;
Tejun Heocb95d562006-03-06 04:31:56 +0900463 u8 base;
464} ata_xfer_tbl[] = {
465 { ATA_SHIFT_PIO, ATA_BITS_PIO, XFER_PIO_0 },
466 { ATA_SHIFT_MWDMA, ATA_BITS_MWDMA, XFER_MW_DMA_0 },
467 { ATA_SHIFT_UDMA, ATA_BITS_UDMA, XFER_UDMA_0 },
468 { -1, },
469};
470
471/**
472 * ata_xfer_mask2mode - Find matching XFER_* for the given xfer_mask
473 * @xfer_mask: xfer_mask of interest
474 *
475 * Return matching XFER_* value for @xfer_mask. Only the highest
476 * bit of @xfer_mask is considered.
477 *
478 * LOCKING:
479 * None.
480 *
481 * RETURNS:
482 * Matching XFER_* value, 0 if no match found.
483 */
484static u8 ata_xfer_mask2mode(unsigned int xfer_mask)
485{
486 int highbit = fls(xfer_mask) - 1;
487 const struct ata_xfer_ent *ent;
488
489 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
490 if (highbit >= ent->shift && highbit < ent->shift + ent->bits)
491 return ent->base + highbit - ent->shift;
492 return 0;
493}
494
495/**
496 * ata_xfer_mode2mask - Find matching xfer_mask for XFER_*
497 * @xfer_mode: XFER_* of interest
498 *
499 * Return matching xfer_mask for @xfer_mode.
500 *
501 * LOCKING:
502 * None.
503 *
504 * RETURNS:
505 * Matching xfer_mask, 0 if no match found.
506 */
507static unsigned int ata_xfer_mode2mask(u8 xfer_mode)
508{
509 const struct ata_xfer_ent *ent;
510
511 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
512 if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits)
513 return 1 << (ent->shift + xfer_mode - ent->base);
514 return 0;
515}
516
517/**
518 * ata_xfer_mode2shift - Find matching xfer_shift for XFER_*
519 * @xfer_mode: XFER_* of interest
520 *
521 * Return matching xfer_shift for @xfer_mode.
522 *
523 * LOCKING:
524 * None.
525 *
526 * RETURNS:
527 * Matching xfer_shift, -1 if no match found.
528 */
529static int ata_xfer_mode2shift(unsigned int xfer_mode)
530{
531 const struct ata_xfer_ent *ent;
532
533 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
534 if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits)
535 return ent->shift;
536 return -1;
537}
538
Linus Torvalds1da177e2005-04-16 15:20:36 -0700539/**
Tejun Heo1da7b0d2006-03-06 04:31:56 +0900540 * ata_mode_string - convert xfer_mask to string
541 * @xfer_mask: mask of bits supported; only highest bit counts.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700542 *
543 * Determine string which represents the highest speed
Tejun Heo1da7b0d2006-03-06 04:31:56 +0900544 * (highest bit in @modemask).
Linus Torvalds1da177e2005-04-16 15:20:36 -0700545 *
546 * LOCKING:
547 * None.
548 *
549 * RETURNS:
550 * Constant C string representing highest speed listed in
Tejun Heo1da7b0d2006-03-06 04:31:56 +0900551 * @mode_mask, or the constant C string "<n/a>".
Linus Torvalds1da177e2005-04-16 15:20:36 -0700552 */
Tejun Heo1da7b0d2006-03-06 04:31:56 +0900553static const char *ata_mode_string(unsigned int xfer_mask)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700554{
Tejun Heo75f554b2006-03-06 04:31:57 +0900555 static const char * const xfer_mode_str[] = {
556 "PIO0",
557 "PIO1",
558 "PIO2",
559 "PIO3",
560 "PIO4",
Alan Coxb352e572006-08-10 18:52:12 +0100561 "PIO5",
562 "PIO6",
Tejun Heo75f554b2006-03-06 04:31:57 +0900563 "MWDMA0",
564 "MWDMA1",
565 "MWDMA2",
Alan Coxb352e572006-08-10 18:52:12 +0100566 "MWDMA3",
567 "MWDMA4",
Tejun Heo75f554b2006-03-06 04:31:57 +0900568 "UDMA/16",
569 "UDMA/25",
570 "UDMA/33",
571 "UDMA/44",
572 "UDMA/66",
573 "UDMA/100",
574 "UDMA/133",
575 "UDMA7",
576 };
Tejun Heo1da7b0d2006-03-06 04:31:56 +0900577 int highbit;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700578
Tejun Heo1da7b0d2006-03-06 04:31:56 +0900579 highbit = fls(xfer_mask) - 1;
580 if (highbit >= 0 && highbit < ARRAY_SIZE(xfer_mode_str))
581 return xfer_mode_str[highbit];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700582 return "<n/a>";
Linus Torvalds1da177e2005-04-16 15:20:36 -0700583}
584
Tejun Heo4c360c82006-04-01 01:38:17 +0900585static const char *sata_spd_string(unsigned int spd)
586{
587 static const char * const spd_str[] = {
588 "1.5 Gbps",
589 "3.0 Gbps",
590 };
591
592 if (spd == 0 || (spd - 1) >= ARRAY_SIZE(spd_str))
593 return "<unknown>";
594 return spd_str[spd - 1];
595}
596
Tejun Heo3373efd2006-05-15 20:57:53 +0900597void ata_dev_disable(struct ata_device *dev)
Tejun Heo0b8efb02006-03-24 15:25:31 +0900598{
Borislav Petkov0dd4b212006-06-23 02:29:08 -0400599 if (ata_dev_enabled(dev) && ata_msg_drv(dev->ap)) {
Tejun Heof15a1da2006-05-15 20:57:56 +0900600 ata_dev_printk(dev, KERN_WARNING, "disabled\n");
Tejun Heo4ae72a12007-02-02 16:22:30 +0900601 ata_down_xfermask_limit(dev, ATA_DNXFER_FORCE_PIO0 |
602 ATA_DNXFER_QUIET);
Tejun Heo0b8efb02006-03-24 15:25:31 +0900603 dev->class++;
604 }
605}
606
Linus Torvalds1da177e2005-04-16 15:20:36 -0700607/**
Linus Torvalds1da177e2005-04-16 15:20:36 -0700608 * ata_devchk - PATA device presence detection
609 * @ap: ATA channel to examine
610 * @device: Device to examine (starting at zero)
611 *
Tejun Heo0d5ff562007-02-01 15:06:36 +0900612 * This technique was originally described in
613 * Hale Landis's ATADRVR (www.ata-atapi.com), and
614 * later found its way into the ATA/ATAPI spec.
615 *
616 * Write a pattern to the ATA shadow registers,
617 * and if a device is present, it will respond by
618 * correctly storing and echoing back the
619 * ATA shadow register contents.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700620 *
621 * LOCKING:
622 * caller.
623 */
624
Tejun Heo0d5ff562007-02-01 15:06:36 +0900625static unsigned int ata_devchk(struct ata_port *ap, unsigned int device)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700626{
Tejun Heo0d5ff562007-02-01 15:06:36 +0900627 struct ata_ioports *ioaddr = &ap->ioaddr;
628 u8 nsect, lbal;
629
630 ap->ops->dev_select(ap, device);
631
632 iowrite8(0x55, ioaddr->nsect_addr);
633 iowrite8(0xaa, ioaddr->lbal_addr);
634
635 iowrite8(0xaa, ioaddr->nsect_addr);
636 iowrite8(0x55, ioaddr->lbal_addr);
637
638 iowrite8(0x55, ioaddr->nsect_addr);
639 iowrite8(0xaa, ioaddr->lbal_addr);
640
641 nsect = ioread8(ioaddr->nsect_addr);
642 lbal = ioread8(ioaddr->lbal_addr);
643
644 if ((nsect == 0x55) && (lbal == 0xaa))
645 return 1; /* we found a device */
646
647 return 0; /* nothing found */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700648}
649
650/**
651 * ata_dev_classify - determine device type based on ATA-spec signature
652 * @tf: ATA taskfile register set for device to be identified
653 *
654 * Determine from taskfile register contents whether a device is
655 * ATA or ATAPI, as per "Signature and persistence" section
656 * of ATA/PI spec (volume 1, sect 5.14).
657 *
658 * LOCKING:
659 * None.
660 *
661 * RETURNS:
662 * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, or %ATA_DEV_UNKNOWN
663 * the event of failure.
664 */
665
Jeff Garzik057ace52005-10-22 14:27:05 -0400666unsigned int ata_dev_classify(const struct ata_taskfile *tf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700667{
668 /* Apple's open source Darwin code hints that some devices only
669 * put a proper signature into the LBA mid/high registers,
670 * So, we only check those. It's sufficient for uniqueness.
671 */
672
673 if (((tf->lbam == 0) && (tf->lbah == 0)) ||
674 ((tf->lbam == 0x3c) && (tf->lbah == 0xc3))) {
675 DPRINTK("found ATA device by sig\n");
676 return ATA_DEV_ATA;
677 }
678
679 if (((tf->lbam == 0x14) && (tf->lbah == 0xeb)) ||
680 ((tf->lbam == 0x69) && (tf->lbah == 0x96))) {
681 DPRINTK("found ATAPI device by sig\n");
682 return ATA_DEV_ATAPI;
683 }
684
685 DPRINTK("unknown device\n");
686 return ATA_DEV_UNKNOWN;
687}
688
689/**
690 * ata_dev_try_classify - Parse returned ATA device signature
691 * @ap: ATA channel to examine
692 * @device: Device to examine (starting at zero)
Tejun Heob4dc7622006-01-24 17:05:22 +0900693 * @r_err: Value of error register on completion
Linus Torvalds1da177e2005-04-16 15:20:36 -0700694 *
695 * After an event -- SRST, E.D.D., or SATA COMRESET -- occurs,
696 * an ATA/ATAPI-defined set of values is placed in the ATA
697 * shadow registers, indicating the results of device detection
698 * and diagnostics.
699 *
700 * Select the ATA device, and read the values from the ATA shadow
701 * registers. Then parse according to the Error register value,
702 * and the spec-defined values examined by ata_dev_classify().
703 *
704 * LOCKING:
705 * caller.
Tejun Heob4dc7622006-01-24 17:05:22 +0900706 *
707 * RETURNS:
708 * Device type - %ATA_DEV_ATA, %ATA_DEV_ATAPI or %ATA_DEV_NONE.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700709 */
710
Akira Iguchia619f981b2007-01-26 16:28:18 +0900711unsigned int
Tejun Heob4dc7622006-01-24 17:05:22 +0900712ata_dev_try_classify(struct ata_port *ap, unsigned int device, u8 *r_err)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700713{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700714 struct ata_taskfile tf;
715 unsigned int class;
716 u8 err;
717
718 ap->ops->dev_select(ap, device);
719
720 memset(&tf, 0, sizeof(tf));
721
Linus Torvalds1da177e2005-04-16 15:20:36 -0700722 ap->ops->tf_read(ap, &tf);
Jeff Garzik0169e282005-10-29 21:25:10 -0400723 err = tf.feature;
Tejun Heob4dc7622006-01-24 17:05:22 +0900724 if (r_err)
725 *r_err = err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700726
Alan Cox93590852006-09-12 16:55:12 +0100727 /* see if device passed diags: if master then continue and warn later */
728 if (err == 0 && device == 0)
729 /* diagnostic fail : do nothing _YET_ */
730 ap->device[device].horkage |= ATA_HORKAGE_DIAGNOSTIC;
731 else if (err == 1)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700732 /* do nothing */ ;
733 else if ((device == 0) && (err == 0x81))
734 /* do nothing */ ;
735 else
Tejun Heob4dc7622006-01-24 17:05:22 +0900736 return ATA_DEV_NONE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700737
Tejun Heob4dc7622006-01-24 17:05:22 +0900738 /* determine if device is ATA or ATAPI */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700739 class = ata_dev_classify(&tf);
Tejun Heob4dc7622006-01-24 17:05:22 +0900740
Linus Torvalds1da177e2005-04-16 15:20:36 -0700741 if (class == ATA_DEV_UNKNOWN)
Tejun Heob4dc7622006-01-24 17:05:22 +0900742 return ATA_DEV_NONE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700743 if ((class == ATA_DEV_ATA) && (ata_chk_status(ap) == 0))
Tejun Heob4dc7622006-01-24 17:05:22 +0900744 return ATA_DEV_NONE;
745 return class;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700746}
747
748/**
Tejun Heo6a62a042006-02-13 10:02:46 +0900749 * ata_id_string - Convert IDENTIFY DEVICE page into string
Linus Torvalds1da177e2005-04-16 15:20:36 -0700750 * @id: IDENTIFY DEVICE results we will examine
751 * @s: string into which data is output
752 * @ofs: offset into identify device page
753 * @len: length of string to return. must be an even number.
754 *
755 * The strings in the IDENTIFY DEVICE page are broken up into
756 * 16-bit chunks. Run through the string, and output each
757 * 8-bit chunk linearly, regardless of platform.
758 *
759 * LOCKING:
760 * caller.
761 */
762
Tejun Heo6a62a042006-02-13 10:02:46 +0900763void ata_id_string(const u16 *id, unsigned char *s,
764 unsigned int ofs, unsigned int len)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700765{
766 unsigned int c;
767
768 while (len > 0) {
769 c = id[ofs] >> 8;
770 *s = c;
771 s++;
772
773 c = id[ofs] & 0xff;
774 *s = c;
775 s++;
776
777 ofs++;
778 len -= 2;
779 }
780}
781
Tejun Heo0e949ff2006-02-12 22:47:04 +0900782/**
Tejun Heo6a62a042006-02-13 10:02:46 +0900783 * ata_id_c_string - Convert IDENTIFY DEVICE page into C string
Tejun Heo0e949ff2006-02-12 22:47:04 +0900784 * @id: IDENTIFY DEVICE results we will examine
785 * @s: string into which data is output
786 * @ofs: offset into identify device page
787 * @len: length of string to return. must be an odd number.
788 *
Tejun Heo6a62a042006-02-13 10:02:46 +0900789 * This function is identical to ata_id_string except that it
Tejun Heo0e949ff2006-02-12 22:47:04 +0900790 * trims trailing spaces and terminates the resulting string with
791 * null. @len must be actual maximum length (even number) + 1.
792 *
793 * LOCKING:
794 * caller.
795 */
Tejun Heo6a62a042006-02-13 10:02:46 +0900796void ata_id_c_string(const u16 *id, unsigned char *s,
797 unsigned int ofs, unsigned int len)
Tejun Heo0e949ff2006-02-12 22:47:04 +0900798{
799 unsigned char *p;
800
801 WARN_ON(!(len & 1));
802
Tejun Heo6a62a042006-02-13 10:02:46 +0900803 ata_id_string(id, s, ofs, len - 1);
Tejun Heo0e949ff2006-02-12 22:47:04 +0900804
805 p = s + strnlen(s, len - 1);
806 while (p > s && p[-1] == ' ')
807 p--;
808 *p = '\0';
809}
Edward Falk0baab862005-06-02 18:17:13 -0400810
Tejun Heo29407402006-02-12 22:47:04 +0900811static u64 ata_id_n_sectors(const u16 *id)
812{
813 if (ata_id_has_lba(id)) {
814 if (ata_id_has_lba48(id))
815 return ata_id_u64(id, 100);
816 else
817 return ata_id_u32(id, 60);
818 } else {
819 if (ata_id_current_chs_valid(id))
820 return ata_id_u32(id, 57);
821 else
822 return id[1] * id[3] * id[6];
823 }
824}
825
Edward Falk0baab862005-06-02 18:17:13 -0400826/**
Alan10305f02007-02-20 18:01:59 +0000827 * ata_id_to_dma_mode - Identify DMA mode from id block
828 * @dev: device to identify
Randy Dunlapcc261262007-03-16 19:55:47 -0700829 * @unknown: mode to assume if we cannot tell
Alan10305f02007-02-20 18:01:59 +0000830 *
831 * Set up the timing values for the device based upon the identify
832 * reported values for the DMA mode. This function is used by drivers
833 * which rely upon firmware configured modes, but wish to report the
834 * mode correctly when possible.
835 *
836 * In addition we emit similarly formatted messages to the default
837 * ata_dev_set_mode handler, in order to provide consistency of
838 * presentation.
839 */
840
841void ata_id_to_dma_mode(struct ata_device *dev, u8 unknown)
842{
843 unsigned int mask;
844 u8 mode;
845
846 /* Pack the DMA modes */
847 mask = ((dev->id[63] >> 8) << ATA_SHIFT_MWDMA) & ATA_MASK_MWDMA;
848 if (dev->id[53] & 0x04)
849 mask |= ((dev->id[88] >> 8) << ATA_SHIFT_UDMA) & ATA_MASK_UDMA;
850
851 /* Select the mode in use */
852 mode = ata_xfer_mask2mode(mask);
853
854 if (mode != 0) {
855 ata_dev_printk(dev, KERN_INFO, "configured for %s\n",
856 ata_mode_string(mask));
857 } else {
858 /* SWDMA perhaps ? */
859 mode = unknown;
860 ata_dev_printk(dev, KERN_INFO, "configured for DMA\n");
861 }
862
863 /* Configure the device reporting */
864 dev->xfer_mode = mode;
865 dev->xfer_shift = ata_xfer_mode2shift(mode);
866}
867
868/**
Edward Falk0baab862005-06-02 18:17:13 -0400869 * ata_noop_dev_select - Select device 0/1 on ATA bus
870 * @ap: ATA channel to manipulate
871 * @device: ATA device (numbered from zero) to select
872 *
873 * This function performs no actual function.
874 *
875 * May be used as the dev_select() entry in ata_port_operations.
876 *
877 * LOCKING:
878 * caller.
879 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700880void ata_noop_dev_select (struct ata_port *ap, unsigned int device)
881{
882}
883
Edward Falk0baab862005-06-02 18:17:13 -0400884
Linus Torvalds1da177e2005-04-16 15:20:36 -0700885/**
886 * ata_std_dev_select - Select device 0/1 on ATA bus
887 * @ap: ATA channel to manipulate
888 * @device: ATA device (numbered from zero) to select
889 *
890 * Use the method defined in the ATA specification to
891 * make either device 0, or device 1, active on the
Edward Falk0baab862005-06-02 18:17:13 -0400892 * ATA channel. Works with both PIO and MMIO.
893 *
894 * May be used as the dev_select() entry in ata_port_operations.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700895 *
896 * LOCKING:
897 * caller.
898 */
899
900void ata_std_dev_select (struct ata_port *ap, unsigned int device)
901{
902 u8 tmp;
903
904 if (device == 0)
905 tmp = ATA_DEVICE_OBS;
906 else
907 tmp = ATA_DEVICE_OBS | ATA_DEV1;
908
Tejun Heo0d5ff562007-02-01 15:06:36 +0900909 iowrite8(tmp, ap->ioaddr.device_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700910 ata_pause(ap); /* needed; also flushes, for mmio */
911}
912
913/**
914 * ata_dev_select - Select device 0/1 on ATA bus
915 * @ap: ATA channel to manipulate
916 * @device: ATA device (numbered from zero) to select
917 * @wait: non-zero to wait for Status register BSY bit to clear
918 * @can_sleep: non-zero if context allows sleeping
919 *
920 * Use the method defined in the ATA specification to
921 * make either device 0, or device 1, active on the
922 * ATA channel.
923 *
924 * This is a high-level version of ata_std_dev_select(),
925 * which additionally provides the services of inserting
926 * the proper pauses and status polling, where needed.
927 *
928 * LOCKING:
929 * caller.
930 */
931
932void ata_dev_select(struct ata_port *ap, unsigned int device,
933 unsigned int wait, unsigned int can_sleep)
934{
Tejun Heo88574552006-06-25 20:00:35 +0900935 if (ata_msg_probe(ap))
Tejun Heo44877b42007-02-21 01:06:51 +0900936 ata_port_printk(ap, KERN_INFO, "ata_dev_select: ENTER, "
937 "device %u, wait %u\n", device, wait);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700938
939 if (wait)
940 ata_wait_idle(ap);
941
942 ap->ops->dev_select(ap, device);
943
944 if (wait) {
945 if (can_sleep && ap->device[device].class == ATA_DEV_ATAPI)
946 msleep(150);
947 ata_wait_idle(ap);
948 }
949}
950
951/**
952 * ata_dump_id - IDENTIFY DEVICE info debugging output
Tejun Heo0bd33002006-02-12 22:47:05 +0900953 * @id: IDENTIFY DEVICE page to dump
Linus Torvalds1da177e2005-04-16 15:20:36 -0700954 *
Tejun Heo0bd33002006-02-12 22:47:05 +0900955 * Dump selected 16-bit words from the given IDENTIFY DEVICE
956 * page.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700957 *
958 * LOCKING:
959 * caller.
960 */
961
Tejun Heo0bd33002006-02-12 22:47:05 +0900962static inline void ata_dump_id(const u16 *id)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700963{
964 DPRINTK("49==0x%04x "
965 "53==0x%04x "
966 "63==0x%04x "
967 "64==0x%04x "
968 "75==0x%04x \n",
Tejun Heo0bd33002006-02-12 22:47:05 +0900969 id[49],
970 id[53],
971 id[63],
972 id[64],
973 id[75]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700974 DPRINTK("80==0x%04x "
975 "81==0x%04x "
976 "82==0x%04x "
977 "83==0x%04x "
978 "84==0x%04x \n",
Tejun Heo0bd33002006-02-12 22:47:05 +0900979 id[80],
980 id[81],
981 id[82],
982 id[83],
983 id[84]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700984 DPRINTK("88==0x%04x "
985 "93==0x%04x\n",
Tejun Heo0bd33002006-02-12 22:47:05 +0900986 id[88],
987 id[93]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700988}
989
Tejun Heocb95d562006-03-06 04:31:56 +0900990/**
991 * ata_id_xfermask - Compute xfermask from the given IDENTIFY data
992 * @id: IDENTIFY data to compute xfer mask from
993 *
994 * Compute the xfermask for this device. This is not as trivial
995 * as it seems if we must consider early devices correctly.
996 *
997 * FIXME: pre IDE drive timing (do we care ?).
998 *
999 * LOCKING:
1000 * None.
1001 *
1002 * RETURNS:
1003 * Computed xfermask
1004 */
1005static unsigned int ata_id_xfermask(const u16 *id)
1006{
1007 unsigned int pio_mask, mwdma_mask, udma_mask;
1008
1009 /* Usual case. Word 53 indicates word 64 is valid */
1010 if (id[ATA_ID_FIELD_VALID] & (1 << 1)) {
1011 pio_mask = id[ATA_ID_PIO_MODES] & 0x03;
1012 pio_mask <<= 3;
1013 pio_mask |= 0x7;
1014 } else {
1015 /* If word 64 isn't valid then Word 51 high byte holds
1016 * the PIO timing number for the maximum. Turn it into
1017 * a mask.
1018 */
Lennert Buytenhek7a0f1c82007-01-29 13:28:47 +01001019 u8 mode = (id[ATA_ID_OLD_PIO_MODES] >> 8) & 0xFF;
Alan Cox46767aeb2006-09-29 18:26:47 +01001020 if (mode < 5) /* Valid PIO range */
1021 pio_mask = (2 << mode) - 1;
1022 else
1023 pio_mask = 1;
Tejun Heocb95d562006-03-06 04:31:56 +09001024
1025 /* But wait.. there's more. Design your standards by
1026 * committee and you too can get a free iordy field to
1027 * process. However its the speeds not the modes that
1028 * are supported... Note drivers using the timing API
1029 * will get this right anyway
1030 */
1031 }
1032
1033 mwdma_mask = id[ATA_ID_MWDMA_MODES] & 0x07;
Tejun Heofb21f0d2006-03-12 12:34:35 +09001034
Alan Coxb352e572006-08-10 18:52:12 +01001035 if (ata_id_is_cfa(id)) {
1036 /*
1037 * Process compact flash extended modes
1038 */
1039 int pio = id[163] & 0x7;
1040 int dma = (id[163] >> 3) & 7;
1041
1042 if (pio)
1043 pio_mask |= (1 << 5);
1044 if (pio > 1)
1045 pio_mask |= (1 << 6);
1046 if (dma)
1047 mwdma_mask |= (1 << 3);
1048 if (dma > 1)
1049 mwdma_mask |= (1 << 4);
1050 }
1051
Tejun Heofb21f0d2006-03-12 12:34:35 +09001052 udma_mask = 0;
1053 if (id[ATA_ID_FIELD_VALID] & (1 << 2))
1054 udma_mask = id[ATA_ID_UDMA_MODES] & 0xff;
Tejun Heocb95d562006-03-06 04:31:56 +09001055
1056 return ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask);
1057}
1058
Tejun Heo86e45b62006-03-05 15:29:09 +09001059/**
1060 * ata_port_queue_task - Queue port_task
1061 * @ap: The ata_port to queue port_task for
Randy Dunlape2a7f772006-05-18 10:50:18 -07001062 * @fn: workqueue function to be scheduled
David Howells65f27f32006-11-22 14:55:48 +00001063 * @data: data for @fn to use
Randy Dunlape2a7f772006-05-18 10:50:18 -07001064 * @delay: delay time for workqueue function
Tejun Heo86e45b62006-03-05 15:29:09 +09001065 *
1066 * Schedule @fn(@data) for execution after @delay jiffies using
1067 * port_task. There is one port_task per port and it's the
1068 * user(low level driver)'s responsibility to make sure that only
1069 * one task is active at any given time.
1070 *
1071 * libata core layer takes care of synchronization between
1072 * port_task and EH. ata_port_queue_task() may be ignored for EH
1073 * synchronization.
1074 *
1075 * LOCKING:
1076 * Inherited from caller.
1077 */
David Howells65f27f32006-11-22 14:55:48 +00001078void ata_port_queue_task(struct ata_port *ap, work_func_t fn, void *data,
Tejun Heo86e45b62006-03-05 15:29:09 +09001079 unsigned long delay)
1080{
1081 int rc;
1082
Tejun Heob51e9e52006-06-29 01:29:30 +09001083 if (ap->pflags & ATA_PFLAG_FLUSH_PORT_TASK)
Tejun Heo86e45b62006-03-05 15:29:09 +09001084 return;
1085
David Howells65f27f32006-11-22 14:55:48 +00001086 PREPARE_DELAYED_WORK(&ap->port_task, fn);
1087 ap->port_task_data = data;
Tejun Heo86e45b62006-03-05 15:29:09 +09001088
David Howells52bad642006-11-22 14:54:01 +00001089 rc = queue_delayed_work(ata_wq, &ap->port_task, delay);
Tejun Heo86e45b62006-03-05 15:29:09 +09001090
1091 /* rc == 0 means that another user is using port task */
1092 WARN_ON(rc == 0);
1093}
1094
1095/**
1096 * ata_port_flush_task - Flush port_task
1097 * @ap: The ata_port to flush port_task for
1098 *
1099 * After this function completes, port_task is guranteed not to
1100 * be running or scheduled.
1101 *
1102 * LOCKING:
1103 * Kernel thread context (may sleep)
1104 */
1105void ata_port_flush_task(struct ata_port *ap)
1106{
1107 unsigned long flags;
1108
1109 DPRINTK("ENTER\n");
1110
Jeff Garzikba6a1302006-06-22 23:46:10 -04001111 spin_lock_irqsave(ap->lock, flags);
Tejun Heob51e9e52006-06-29 01:29:30 +09001112 ap->pflags |= ATA_PFLAG_FLUSH_PORT_TASK;
Jeff Garzikba6a1302006-06-22 23:46:10 -04001113 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heo86e45b62006-03-05 15:29:09 +09001114
1115 DPRINTK("flush #1\n");
1116 flush_workqueue(ata_wq);
1117
1118 /*
1119 * At this point, if a task is running, it's guaranteed to see
1120 * the FLUSH flag; thus, it will never queue pio tasks again.
1121 * Cancel and flush.
1122 */
1123 if (!cancel_delayed_work(&ap->port_task)) {
Borislav Petkov0dd4b212006-06-23 02:29:08 -04001124 if (ata_msg_ctl(ap))
Tejun Heo88574552006-06-25 20:00:35 +09001125 ata_port_printk(ap, KERN_DEBUG, "%s: flush #2\n",
1126 __FUNCTION__);
Tejun Heo86e45b62006-03-05 15:29:09 +09001127 flush_workqueue(ata_wq);
1128 }
1129
Jeff Garzikba6a1302006-06-22 23:46:10 -04001130 spin_lock_irqsave(ap->lock, flags);
Tejun Heob51e9e52006-06-29 01:29:30 +09001131 ap->pflags &= ~ATA_PFLAG_FLUSH_PORT_TASK;
Jeff Garzikba6a1302006-06-22 23:46:10 -04001132 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heo86e45b62006-03-05 15:29:09 +09001133
Borislav Petkov0dd4b212006-06-23 02:29:08 -04001134 if (ata_msg_ctl(ap))
1135 ata_port_printk(ap, KERN_DEBUG, "%s: EXIT\n", __FUNCTION__);
Tejun Heo86e45b62006-03-05 15:29:09 +09001136}
1137
Adrian Bunk7102d232007-01-04 00:09:36 +01001138static void ata_qc_complete_internal(struct ata_queued_cmd *qc)
Tejun Heoa2a7a662005-12-13 14:48:31 +09001139{
Tejun Heo77853bf2006-01-23 13:09:36 +09001140 struct completion *waiting = qc->private_data;
Tejun Heoa2a7a662005-12-13 14:48:31 +09001141
Tejun Heoa2a7a662005-12-13 14:48:31 +09001142 complete(waiting);
Tejun Heoa2a7a662005-12-13 14:48:31 +09001143}
1144
1145/**
Tejun Heo24326972006-11-14 22:47:09 +09001146 * ata_exec_internal_sg - execute libata internal command
Tejun Heoa2a7a662005-12-13 14:48:31 +09001147 * @dev: Device to which the command is sent
1148 * @tf: Taskfile registers for the command and the result
Tejun Heod69cf372006-04-02 18:51:53 +09001149 * @cdb: CDB for packet command
Tejun Heoa2a7a662005-12-13 14:48:31 +09001150 * @dma_dir: Data tranfer direction of the command
Tejun Heo24326972006-11-14 22:47:09 +09001151 * @sg: sg list for the data buffer of the command
1152 * @n_elem: Number of sg entries
Tejun Heoa2a7a662005-12-13 14:48:31 +09001153 *
1154 * Executes libata internal command with timeout. @tf contains
1155 * command on entry and result on return. Timeout and error
1156 * conditions are reported via return value. No recovery action
1157 * is taken after a command times out. It's caller's duty to
1158 * clean up after timeout.
1159 *
1160 * LOCKING:
1161 * None. Should be called with kernel context, might sleep.
Tejun Heo551e8882006-06-12 14:09:49 +09001162 *
1163 * RETURNS:
1164 * Zero on success, AC_ERR_* mask on failure
Tejun Heoa2a7a662005-12-13 14:48:31 +09001165 */
Tejun Heo24326972006-11-14 22:47:09 +09001166unsigned ata_exec_internal_sg(struct ata_device *dev,
1167 struct ata_taskfile *tf, const u8 *cdb,
1168 int dma_dir, struct scatterlist *sg,
1169 unsigned int n_elem)
Tejun Heoa2a7a662005-12-13 14:48:31 +09001170{
Tejun Heo3373efd2006-05-15 20:57:53 +09001171 struct ata_port *ap = dev->ap;
Tejun Heoa2a7a662005-12-13 14:48:31 +09001172 u8 command = tf->command;
1173 struct ata_queued_cmd *qc;
Tejun Heo2ab7db12006-05-15 20:58:02 +09001174 unsigned int tag, preempted_tag;
Tejun Heodedaf2b2006-05-15 21:03:43 +09001175 u32 preempted_sactive, preempted_qc_active;
Ingo Molnar60be6b92006-07-03 00:25:26 -07001176 DECLARE_COMPLETION_ONSTACK(wait);
Tejun Heoa2a7a662005-12-13 14:48:31 +09001177 unsigned long flags;
Tejun Heo77853bf2006-01-23 13:09:36 +09001178 unsigned int err_mask;
Tejun Heod95a7172006-05-15 20:58:14 +09001179 int rc;
Tejun Heoa2a7a662005-12-13 14:48:31 +09001180
Jeff Garzikba6a1302006-06-22 23:46:10 -04001181 spin_lock_irqsave(ap->lock, flags);
Tejun Heoa2a7a662005-12-13 14:48:31 +09001182
Tejun Heoe3180492006-05-15 20:58:09 +09001183 /* no internal command while frozen */
Tejun Heob51e9e52006-06-29 01:29:30 +09001184 if (ap->pflags & ATA_PFLAG_FROZEN) {
Jeff Garzikba6a1302006-06-22 23:46:10 -04001185 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heoe3180492006-05-15 20:58:09 +09001186 return AC_ERR_SYSTEM;
1187 }
1188
Tejun Heo2ab7db12006-05-15 20:58:02 +09001189 /* initialize internal qc */
Tejun Heoa2a7a662005-12-13 14:48:31 +09001190
Tejun Heo2ab7db12006-05-15 20:58:02 +09001191 /* XXX: Tag 0 is used for drivers with legacy EH as some
1192 * drivers choke if any other tag is given. This breaks
1193 * ata_tag_internal() test for those drivers. Don't use new
1194 * EH stuff without converting to it.
1195 */
1196 if (ap->ops->error_handler)
1197 tag = ATA_TAG_INTERNAL;
1198 else
1199 tag = 0;
1200
Tejun Heo6cec4a32006-05-15 21:03:41 +09001201 if (test_and_set_bit(tag, &ap->qc_allocated))
Tejun Heo2ab7db12006-05-15 20:58:02 +09001202 BUG();
Tejun Heof69499f2006-05-15 20:58:03 +09001203 qc = __ata_qc_from_tag(ap, tag);
Tejun Heo2ab7db12006-05-15 20:58:02 +09001204
1205 qc->tag = tag;
1206 qc->scsicmd = NULL;
1207 qc->ap = ap;
1208 qc->dev = dev;
1209 ata_qc_reinit(qc);
1210
1211 preempted_tag = ap->active_tag;
Tejun Heodedaf2b2006-05-15 21:03:43 +09001212 preempted_sactive = ap->sactive;
1213 preempted_qc_active = ap->qc_active;
Tejun Heo2ab7db12006-05-15 20:58:02 +09001214 ap->active_tag = ATA_TAG_POISON;
Tejun Heodedaf2b2006-05-15 21:03:43 +09001215 ap->sactive = 0;
1216 ap->qc_active = 0;
Tejun Heo2ab7db12006-05-15 20:58:02 +09001217
1218 /* prepare & issue qc */
Tejun Heoa2a7a662005-12-13 14:48:31 +09001219 qc->tf = *tf;
Tejun Heod69cf372006-04-02 18:51:53 +09001220 if (cdb)
1221 memcpy(qc->cdb, cdb, ATAPI_CDB_LEN);
Tejun Heoe61e0672006-05-15 20:57:40 +09001222 qc->flags |= ATA_QCFLAG_RESULT_TF;
Tejun Heoa2a7a662005-12-13 14:48:31 +09001223 qc->dma_dir = dma_dir;
1224 if (dma_dir != DMA_NONE) {
Tejun Heo24326972006-11-14 22:47:09 +09001225 unsigned int i, buflen = 0;
1226
1227 for (i = 0; i < n_elem; i++)
1228 buflen += sg[i].length;
1229
1230 ata_sg_init(qc, sg, n_elem);
Brian King49c80422007-01-30 11:32:26 -06001231 qc->nbytes = buflen;
Tejun Heoa2a7a662005-12-13 14:48:31 +09001232 }
1233
Tejun Heo77853bf2006-01-23 13:09:36 +09001234 qc->private_data = &wait;
Tejun Heoa2a7a662005-12-13 14:48:31 +09001235 qc->complete_fn = ata_qc_complete_internal;
1236
Tejun Heo8e0e6942006-03-31 20:41:11 +09001237 ata_qc_issue(qc);
Tejun Heoa2a7a662005-12-13 14:48:31 +09001238
Jeff Garzikba6a1302006-06-22 23:46:10 -04001239 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heoa2a7a662005-12-13 14:48:31 +09001240
Andrew Mortona8601e52006-06-25 01:36:52 -07001241 rc = wait_for_completion_timeout(&wait, ata_probe_timeout);
Albert Lee41ade502006-03-14 11:19:04 +08001242
Tejun Heod95a7172006-05-15 20:58:14 +09001243 ata_port_flush_task(ap);
1244
1245 if (!rc) {
Jeff Garzikba6a1302006-06-22 23:46:10 -04001246 spin_lock_irqsave(ap->lock, flags);
Tejun Heoa2a7a662005-12-13 14:48:31 +09001247
1248 /* We're racing with irq here. If we lose, the
1249 * following test prevents us from completing the qc
Tejun Heod95a7172006-05-15 20:58:14 +09001250 * twice. If we win, the port is frozen and will be
1251 * cleaned up by ->post_internal_cmd().
Tejun Heoa2a7a662005-12-13 14:48:31 +09001252 */
Tejun Heo77853bf2006-01-23 13:09:36 +09001253 if (qc->flags & ATA_QCFLAG_ACTIVE) {
Tejun Heod95a7172006-05-15 20:58:14 +09001254 qc->err_mask |= AC_ERR_TIMEOUT;
1255
1256 if (ap->ops->error_handler)
1257 ata_port_freeze(ap);
1258 else
1259 ata_qc_complete(qc);
Tejun Heof15a1da2006-05-15 20:57:56 +09001260
Borislav Petkov0dd4b212006-06-23 02:29:08 -04001261 if (ata_msg_warn(ap))
1262 ata_dev_printk(dev, KERN_WARNING,
Tejun Heo88574552006-06-25 20:00:35 +09001263 "qc timeout (cmd 0x%x)\n", command);
Tejun Heoa2a7a662005-12-13 14:48:31 +09001264 }
1265
Jeff Garzikba6a1302006-06-22 23:46:10 -04001266 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heoa2a7a662005-12-13 14:48:31 +09001267 }
1268
Tejun Heod95a7172006-05-15 20:58:14 +09001269 /* do post_internal_cmd */
1270 if (ap->ops->post_internal_cmd)
1271 ap->ops->post_internal_cmd(qc);
1272
Tejun Heoa51d6442007-03-20 15:24:11 +09001273 /* perform minimal error analysis */
1274 if (qc->flags & ATA_QCFLAG_FAILED) {
1275 if (qc->result_tf.command & (ATA_ERR | ATA_DF))
1276 qc->err_mask |= AC_ERR_DEV;
1277
1278 if (!qc->err_mask)
1279 qc->err_mask |= AC_ERR_OTHER;
1280
1281 if (qc->err_mask & ~AC_ERR_OTHER)
1282 qc->err_mask &= ~AC_ERR_OTHER;
Tejun Heod95a7172006-05-15 20:58:14 +09001283 }
1284
Tejun Heo15869302006-05-15 20:57:33 +09001285 /* finish up */
Jeff Garzikba6a1302006-06-22 23:46:10 -04001286 spin_lock_irqsave(ap->lock, flags);
Tejun Heo15869302006-05-15 20:57:33 +09001287
Tejun Heoe61e0672006-05-15 20:57:40 +09001288 *tf = qc->result_tf;
Tejun Heo77853bf2006-01-23 13:09:36 +09001289 err_mask = qc->err_mask;
1290
1291 ata_qc_free(qc);
Tejun Heo2ab7db12006-05-15 20:58:02 +09001292 ap->active_tag = preempted_tag;
Tejun Heodedaf2b2006-05-15 21:03:43 +09001293 ap->sactive = preempted_sactive;
1294 ap->qc_active = preempted_qc_active;
Tejun Heo77853bf2006-01-23 13:09:36 +09001295
Tejun Heo1f7dd3e2006-03-24 15:25:30 +09001296 /* XXX - Some LLDDs (sata_mv) disable port on command failure.
1297 * Until those drivers are fixed, we detect the condition
1298 * here, fail the command with AC_ERR_SYSTEM and reenable the
1299 * port.
1300 *
1301 * Note that this doesn't change any behavior as internal
1302 * command failure results in disabling the device in the
1303 * higher layer for LLDDs without new reset/EH callbacks.
1304 *
1305 * Kill the following code as soon as those drivers are fixed.
1306 */
Tejun Heo198e0fe2006-04-02 18:51:52 +09001307 if (ap->flags & ATA_FLAG_DISABLED) {
Tejun Heo1f7dd3e2006-03-24 15:25:30 +09001308 err_mask |= AC_ERR_SYSTEM;
1309 ata_port_probe(ap);
1310 }
1311
Jeff Garzikba6a1302006-06-22 23:46:10 -04001312 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heo15869302006-05-15 20:57:33 +09001313
Tejun Heo77853bf2006-01-23 13:09:36 +09001314 return err_mask;
Tejun Heoa2a7a662005-12-13 14:48:31 +09001315}
1316
Linus Torvalds1da177e2005-04-16 15:20:36 -07001317/**
Tejun Heo33480a02006-12-12 02:15:31 +09001318 * ata_exec_internal - execute libata internal command
Tejun Heo24326972006-11-14 22:47:09 +09001319 * @dev: Device to which the command is sent
1320 * @tf: Taskfile registers for the command and the result
1321 * @cdb: CDB for packet command
1322 * @dma_dir: Data tranfer direction of the command
1323 * @buf: Data buffer of the command
1324 * @buflen: Length of data buffer
1325 *
1326 * Wrapper around ata_exec_internal_sg() which takes simple
1327 * buffer instead of sg list.
1328 *
1329 * LOCKING:
1330 * None. Should be called with kernel context, might sleep.
1331 *
1332 * RETURNS:
1333 * Zero on success, AC_ERR_* mask on failure
1334 */
1335unsigned ata_exec_internal(struct ata_device *dev,
1336 struct ata_taskfile *tf, const u8 *cdb,
1337 int dma_dir, void *buf, unsigned int buflen)
1338{
Tejun Heo33480a02006-12-12 02:15:31 +09001339 struct scatterlist *psg = NULL, sg;
1340 unsigned int n_elem = 0;
Tejun Heo24326972006-11-14 22:47:09 +09001341
Tejun Heo33480a02006-12-12 02:15:31 +09001342 if (dma_dir != DMA_NONE) {
1343 WARN_ON(!buf);
1344 sg_init_one(&sg, buf, buflen);
1345 psg = &sg;
1346 n_elem++;
1347 }
Tejun Heo24326972006-11-14 22:47:09 +09001348
Tejun Heo33480a02006-12-12 02:15:31 +09001349 return ata_exec_internal_sg(dev, tf, cdb, dma_dir, psg, n_elem);
Tejun Heo24326972006-11-14 22:47:09 +09001350}
1351
1352/**
Tejun Heo977e6b92006-06-24 20:30:19 +09001353 * ata_do_simple_cmd - execute simple internal command
1354 * @dev: Device to which the command is sent
1355 * @cmd: Opcode to execute
1356 *
1357 * Execute a 'simple' command, that only consists of the opcode
1358 * 'cmd' itself, without filling any other registers
1359 *
1360 * LOCKING:
1361 * Kernel thread context (may sleep).
1362 *
1363 * RETURNS:
1364 * Zero on success, AC_ERR_* mask on failure
Tejun Heoe58eb582006-06-24 20:30:19 +09001365 */
Tejun Heo77b08fb2006-06-24 20:30:19 +09001366unsigned int ata_do_simple_cmd(struct ata_device *dev, u8 cmd)
Tejun Heoe58eb582006-06-24 20:30:19 +09001367{
1368 struct ata_taskfile tf;
Tejun Heoe58eb582006-06-24 20:30:19 +09001369
1370 ata_tf_init(dev, &tf);
1371
1372 tf.command = cmd;
1373 tf.flags |= ATA_TFLAG_DEVICE;
1374 tf.protocol = ATA_PROT_NODATA;
1375
Tejun Heo977e6b92006-06-24 20:30:19 +09001376 return ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0);
Tejun Heoe58eb582006-06-24 20:30:19 +09001377}
1378
Linus Torvalds1da177e2005-04-16 15:20:36 -07001379/**
Alan Cox1bc4ccf2006-01-09 17:18:14 +00001380 * ata_pio_need_iordy - check if iordy needed
1381 * @adev: ATA device
1382 *
1383 * Check if the current speed of the device requires IORDY. Used
1384 * by various controllers for chip configuration.
1385 */
Alan Cox432729f2007-03-08 23:22:59 +00001386
Alan Cox1bc4ccf2006-01-09 17:18:14 +00001387unsigned int ata_pio_need_iordy(const struct ata_device *adev)
1388{
Alan Cox432729f2007-03-08 23:22:59 +00001389 /* Controller doesn't support IORDY. Probably a pointless check
1390 as the caller should know this */
1391 if (adev->ap->flags & ATA_FLAG_NO_IORDY)
Alan Cox1bc4ccf2006-01-09 17:18:14 +00001392 return 0;
Alan Cox432729f2007-03-08 23:22:59 +00001393 /* PIO3 and higher it is mandatory */
1394 if (adev->pio_mode > XFER_PIO_2)
Alan Cox1bc4ccf2006-01-09 17:18:14 +00001395 return 1;
Alan Cox432729f2007-03-08 23:22:59 +00001396 /* We turn it on when possible */
1397 if (ata_id_has_iordy(adev->id))
1398 return 1;
1399 return 0;
1400}
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05001401
Alan Cox432729f2007-03-08 23:22:59 +00001402/**
1403 * ata_pio_mask_no_iordy - Return the non IORDY mask
1404 * @adev: ATA device
1405 *
1406 * Compute the highest mode possible if we are not using iordy. Return
1407 * -1 if no iordy mode is available.
1408 */
1409
1410static u32 ata_pio_mask_no_iordy(const struct ata_device *adev)
1411{
Alan Cox1bc4ccf2006-01-09 17:18:14 +00001412 /* If we have no drive specific rule, then PIO 2 is non IORDY */
Alan Cox1bc4ccf2006-01-09 17:18:14 +00001413 if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE */
Alan Cox432729f2007-03-08 23:22:59 +00001414 u16 pio = adev->id[ATA_ID_EIDE_PIO];
Alan Cox1bc4ccf2006-01-09 17:18:14 +00001415 /* Is the speed faster than the drive allows non IORDY ? */
1416 if (pio) {
1417 /* This is cycle times not frequency - watch the logic! */
1418 if (pio > 240) /* PIO2 is 240nS per cycle */
Alan Cox432729f2007-03-08 23:22:59 +00001419 return 3 << ATA_SHIFT_PIO;
1420 return 7 << ATA_SHIFT_PIO;
Alan Cox1bc4ccf2006-01-09 17:18:14 +00001421 }
1422 }
Alan Cox432729f2007-03-08 23:22:59 +00001423 return 3 << ATA_SHIFT_PIO;
Alan Cox1bc4ccf2006-01-09 17:18:14 +00001424}
1425
1426/**
Tejun Heo49016ac2006-02-21 02:12:11 +09001427 * ata_dev_read_id - Read ID data from the specified device
Tejun Heo49016ac2006-02-21 02:12:11 +09001428 * @dev: target device
1429 * @p_class: pointer to class of the target device (may be changed)
Tejun Heobff04642006-11-10 18:08:10 +09001430 * @flags: ATA_READID_* flags
Tejun Heofe635c72006-05-15 20:57:35 +09001431 * @id: buffer to read IDENTIFY data into
Tejun Heo49016ac2006-02-21 02:12:11 +09001432 *
1433 * Read ID data from the specified device. ATA_CMD_ID_ATA is
1434 * performed on ATA devices and ATA_CMD_ID_ATAPI on ATAPI
Tejun Heoaec5c3c2006-03-25 01:33:34 +09001435 * devices. This function also issues ATA_CMD_INIT_DEV_PARAMS
1436 * for pre-ATA4 drives.
Tejun Heo49016ac2006-02-21 02:12:11 +09001437 *
1438 * LOCKING:
1439 * Kernel thread context (may sleep)
1440 *
1441 * RETURNS:
1442 * 0 on success, -errno otherwise.
1443 */
Tejun Heoa9beec92006-05-31 18:27:44 +09001444int ata_dev_read_id(struct ata_device *dev, unsigned int *p_class,
Tejun Heobff04642006-11-10 18:08:10 +09001445 unsigned int flags, u16 *id)
Tejun Heo49016ac2006-02-21 02:12:11 +09001446{
Tejun Heo3373efd2006-05-15 20:57:53 +09001447 struct ata_port *ap = dev->ap;
Tejun Heo49016ac2006-02-21 02:12:11 +09001448 unsigned int class = *p_class;
Tejun Heo49016ac2006-02-21 02:12:11 +09001449 struct ata_taskfile tf;
1450 unsigned int err_mask = 0;
1451 const char *reason;
1452 int rc;
1453
Borislav Petkov0dd4b212006-06-23 02:29:08 -04001454 if (ata_msg_ctl(ap))
Tejun Heo44877b42007-02-21 01:06:51 +09001455 ata_dev_printk(dev, KERN_DEBUG, "%s: ENTER\n", __FUNCTION__);
Tejun Heo49016ac2006-02-21 02:12:11 +09001456
Tejun Heo49016ac2006-02-21 02:12:11 +09001457 ata_dev_select(ap, dev->devno, 1, 1); /* select device 0/1 */
1458
1459 retry:
Tejun Heo3373efd2006-05-15 20:57:53 +09001460 ata_tf_init(dev, &tf);
Tejun Heo49016ac2006-02-21 02:12:11 +09001461
1462 switch (class) {
1463 case ATA_DEV_ATA:
1464 tf.command = ATA_CMD_ID_ATA;
1465 break;
1466 case ATA_DEV_ATAPI:
1467 tf.command = ATA_CMD_ID_ATAPI;
1468 break;
1469 default:
1470 rc = -ENODEV;
1471 reason = "unsupported class";
1472 goto err_out;
1473 }
1474
1475 tf.protocol = ATA_PROT_PIO;
Tejun Heo81afe892007-02-07 12:37:41 -08001476
1477 /* Some devices choke if TF registers contain garbage. Make
1478 * sure those are properly initialized.
1479 */
1480 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
1481
1482 /* Device presence detection is unreliable on some
1483 * controllers. Always poll IDENTIFY if available.
1484 */
1485 tf.flags |= ATA_TFLAG_POLLING;
Tejun Heo49016ac2006-02-21 02:12:11 +09001486
Tejun Heo3373efd2006-05-15 20:57:53 +09001487 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_FROM_DEVICE,
Tejun Heo49016ac2006-02-21 02:12:11 +09001488 id, sizeof(id[0]) * ATA_ID_WORDS);
Tejun Heo49016ac2006-02-21 02:12:11 +09001489 if (err_mask) {
Tejun Heo800b3992006-12-03 21:34:13 +09001490 if (err_mask & AC_ERR_NODEV_HINT) {
Tejun Heo55a8e2c2006-11-10 18:08:10 +09001491 DPRINTK("ata%u.%d: NODEV after polling detection\n",
Tejun Heo44877b42007-02-21 01:06:51 +09001492 ap->print_id, dev->devno);
Tejun Heo55a8e2c2006-11-10 18:08:10 +09001493 return -ENOENT;
1494 }
1495
Tejun Heo49016ac2006-02-21 02:12:11 +09001496 rc = -EIO;
1497 reason = "I/O error";
Tejun Heo49016ac2006-02-21 02:12:11 +09001498 goto err_out;
1499 }
1500
1501 swap_buf_le16(id, ATA_ID_WORDS);
1502
Tejun Heo49016ac2006-02-21 02:12:11 +09001503 /* sanity check */
Tejun Heoa4f57492006-09-12 20:35:49 -07001504 rc = -EINVAL;
1505 reason = "device reports illegal type";
1506
1507 if (class == ATA_DEV_ATA) {
1508 if (!ata_id_is_ata(id) && !ata_id_is_cfa(id))
1509 goto err_out;
1510 } else {
1511 if (ata_id_is_ata(id))
1512 goto err_out;
Tejun Heo49016ac2006-02-21 02:12:11 +09001513 }
1514
Tejun Heobff04642006-11-10 18:08:10 +09001515 if ((flags & ATA_READID_POSTRESET) && class == ATA_DEV_ATA) {
Tejun Heo49016ac2006-02-21 02:12:11 +09001516 /*
1517 * The exact sequence expected by certain pre-ATA4 drives is:
1518 * SRST RESET
1519 * IDENTIFY
1520 * INITIALIZE DEVICE PARAMETERS
1521 * anything else..
1522 * Some drives were very specific about that exact sequence.
1523 */
1524 if (ata_id_major_version(id) < 4 || !ata_id_has_lba(id)) {
Tejun Heo3373efd2006-05-15 20:57:53 +09001525 err_mask = ata_dev_init_params(dev, id[3], id[6]);
Tejun Heo49016ac2006-02-21 02:12:11 +09001526 if (err_mask) {
1527 rc = -EIO;
1528 reason = "INIT_DEV_PARAMS failed";
1529 goto err_out;
1530 }
1531
1532 /* current CHS translation info (id[53-58]) might be
1533 * changed. reread the identify device info.
1534 */
Tejun Heobff04642006-11-10 18:08:10 +09001535 flags &= ~ATA_READID_POSTRESET;
Tejun Heo49016ac2006-02-21 02:12:11 +09001536 goto retry;
1537 }
1538 }
1539
1540 *p_class = class;
Tejun Heofe635c72006-05-15 20:57:35 +09001541
Tejun Heo49016ac2006-02-21 02:12:11 +09001542 return 0;
1543
1544 err_out:
Tejun Heo88574552006-06-25 20:00:35 +09001545 if (ata_msg_warn(ap))
Borislav Petkov0dd4b212006-06-23 02:29:08 -04001546 ata_dev_printk(dev, KERN_WARNING, "failed to IDENTIFY "
Tejun Heo88574552006-06-25 20:00:35 +09001547 "(%s, err_mask=0x%x)\n", reason, err_mask);
Tejun Heo49016ac2006-02-21 02:12:11 +09001548 return rc;
1549}
1550
Tejun Heo3373efd2006-05-15 20:57:53 +09001551static inline u8 ata_dev_knobble(struct ata_device *dev)
Tejun Heo4b2f3ed2006-03-01 16:09:36 +09001552{
Tejun Heo3373efd2006-05-15 20:57:53 +09001553 return ((dev->ap->cbl == ATA_CBL_SATA) && (!ata_id_is_sata(dev->id)));
Tejun Heo4b2f3ed2006-03-01 16:09:36 +09001554}
1555
Tejun Heoa6e6ce82006-05-15 21:03:48 +09001556static void ata_dev_config_ncq(struct ata_device *dev,
1557 char *desc, size_t desc_sz)
1558{
1559 struct ata_port *ap = dev->ap;
1560 int hdepth = 0, ddepth = ata_id_queue_depth(dev->id);
1561
1562 if (!ata_id_has_ncq(dev->id)) {
1563 desc[0] = '\0';
1564 return;
1565 }
Alan Cox6919a0a2006-10-27 19:08:46 -07001566 if (ata_device_blacklisted(dev) & ATA_HORKAGE_NONCQ) {
1567 snprintf(desc, desc_sz, "NCQ (not used)");
1568 return;
1569 }
Tejun Heoa6e6ce82006-05-15 21:03:48 +09001570 if (ap->flags & ATA_FLAG_NCQ) {
Jeff Garzikcca39742006-08-24 03:19:22 -04001571 hdepth = min(ap->scsi_host->can_queue, ATA_MAX_QUEUE - 1);
Tejun Heoa6e6ce82006-05-15 21:03:48 +09001572 dev->flags |= ATA_DFLAG_NCQ;
1573 }
1574
1575 if (hdepth >= ddepth)
1576 snprintf(desc, desc_sz, "NCQ (depth %d)", ddepth);
1577 else
1578 snprintf(desc, desc_sz, "NCQ (depth %d/%d)", hdepth, ddepth);
1579}
1580
Tejun Heo49016ac2006-02-21 02:12:11 +09001581/**
Tejun Heoffeae412006-03-01 16:09:35 +09001582 * ata_dev_configure - Configure the specified ATA/ATAPI device
Tejun Heoffeae412006-03-01 16:09:35 +09001583 * @dev: Target device to configure
Linus Torvalds1da177e2005-04-16 15:20:36 -07001584 *
Tejun Heoffeae412006-03-01 16:09:35 +09001585 * Configure @dev according to @dev->id. Generic and low-level
1586 * driver specific fixups are also applied.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001587 *
1588 * LOCKING:
Tejun Heoffeae412006-03-01 16:09:35 +09001589 * Kernel thread context (may sleep)
1590 *
1591 * RETURNS:
1592 * 0 on success, -errno otherwise
Linus Torvalds1da177e2005-04-16 15:20:36 -07001593 */
Tejun Heoefdaedc2006-11-01 18:38:52 +09001594int ata_dev_configure(struct ata_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001595{
Tejun Heo3373efd2006-05-15 20:57:53 +09001596 struct ata_port *ap = dev->ap;
Tejun Heoefdaedc2006-11-01 18:38:52 +09001597 int print_info = ap->eh_context.i.flags & ATA_EHI_PRINTINFO;
Tejun Heo1148c3a2006-03-13 19:48:04 +09001598 const u16 *id = dev->id;
Tejun Heoff8854b2006-03-06 04:31:56 +09001599 unsigned int xfer_mask;
Alan Coxb352e572006-08-10 18:52:12 +01001600 char revbuf[7]; /* XYZ-99\0 */
Eric D. Mudama3f64f562007-01-30 23:00:40 -07001601 char fwrevbuf[ATA_ID_FW_REV_LEN+1];
1602 char modelbuf[ATA_ID_PROD_LEN+1];
Brian Kinge6d902a2006-06-28 08:30:31 -05001603 int rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001604
Borislav Petkov0dd4b212006-06-23 02:29:08 -04001605 if (!ata_dev_enabled(dev) && ata_msg_info(ap)) {
Tejun Heo44877b42007-02-21 01:06:51 +09001606 ata_dev_printk(dev, KERN_INFO, "%s: ENTER/EXIT -- nodev\n",
1607 __FUNCTION__);
Tejun Heoffeae412006-03-01 16:09:35 +09001608 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001609 }
1610
Borislav Petkov0dd4b212006-06-23 02:29:08 -04001611 if (ata_msg_probe(ap))
Tejun Heo44877b42007-02-21 01:06:51 +09001612 ata_dev_printk(dev, KERN_DEBUG, "%s: ENTER\n", __FUNCTION__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001613
Kristen Carlson Accardi08573a82006-11-10 16:14:47 -08001614 /* set _SDD */
1615 rc = ata_acpi_push_id(ap, dev->devno);
1616 if (rc) {
1617 ata_dev_printk(dev, KERN_WARNING, "failed to set _SDD(%d)\n",
1618 rc);
1619 }
1620
1621 /* retrieve and execute the ATA task file of _GTF */
1622 ata_acpi_exec_tfs(ap);
1623
Tejun Heoc39f5eb2006-03-13 19:51:19 +09001624 /* print device capabilities */
Borislav Petkov0dd4b212006-06-23 02:29:08 -04001625 if (ata_msg_probe(ap))
Tejun Heo88574552006-06-25 20:00:35 +09001626 ata_dev_printk(dev, KERN_DEBUG,
1627 "%s: cfg 49:%04x 82:%04x 83:%04x 84:%04x "
1628 "85:%04x 86:%04x 87:%04x 88:%04x\n",
Borislav Petkov0dd4b212006-06-23 02:29:08 -04001629 __FUNCTION__,
Tejun Heof15a1da2006-05-15 20:57:56 +09001630 id[49], id[82], id[83], id[84],
1631 id[85], id[86], id[87], id[88]);
Tejun Heoc39f5eb2006-03-13 19:51:19 +09001632
Tejun Heo208a9932006-03-05 17:55:58 +09001633 /* initialize to-be-configured parameters */
Tejun Heoea1dd4e2006-04-02 18:51:53 +09001634 dev->flags &= ~ATA_DFLAG_CFG_MASK;
Tejun Heo208a9932006-03-05 17:55:58 +09001635 dev->max_sectors = 0;
1636 dev->cdb_len = 0;
1637 dev->n_sectors = 0;
1638 dev->cylinders = 0;
1639 dev->heads = 0;
1640 dev->sectors = 0;
1641
Linus Torvalds1da177e2005-04-16 15:20:36 -07001642 /*
1643 * common ATA, ATAPI feature tests
1644 */
1645
Tejun Heoff8854b2006-03-06 04:31:56 +09001646 /* find max transfer mode; for printk only */
Tejun Heo1148c3a2006-03-13 19:48:04 +09001647 xfer_mask = ata_id_xfermask(id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001648
Borislav Petkov0dd4b212006-06-23 02:29:08 -04001649 if (ata_msg_probe(ap))
1650 ata_dump_id(id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001651
1652 /* ATA-specific feature tests */
1653 if (dev->class == ATA_DEV_ATA) {
Alan Coxb352e572006-08-10 18:52:12 +01001654 if (ata_id_is_cfa(id)) {
1655 if (id[162] & 1) /* CPRM may make this media unusable */
Tejun Heo44877b42007-02-21 01:06:51 +09001656 ata_dev_printk(dev, KERN_WARNING,
1657 "supports DRM functions and may "
1658 "not be fully accessable.\n");
Alan Coxb352e572006-08-10 18:52:12 +01001659 snprintf(revbuf, 7, "CFA");
1660 }
1661 else
1662 snprintf(revbuf, 7, "ATA-%d", ata_id_major_version(id));
1663
Tejun Heo1148c3a2006-03-13 19:48:04 +09001664 dev->n_sectors = ata_id_n_sectors(id);
Tejun Heo29407402006-02-12 22:47:04 +09001665
Eric D. Mudama3f64f562007-01-30 23:00:40 -07001666 /* SCSI only uses 4-char revisions, dump full 8 chars from ATA */
Jeff Garzik591a6e82007-02-06 21:08:14 -05001667 ata_id_c_string(dev->id, fwrevbuf, ATA_ID_FW_REV,
Eric D. Mudama3f64f562007-01-30 23:00:40 -07001668 sizeof(fwrevbuf));
1669
Jeff Garzik591a6e82007-02-06 21:08:14 -05001670 ata_id_c_string(dev->id, modelbuf, ATA_ID_PROD,
Eric D. Mudama3f64f562007-01-30 23:00:40 -07001671 sizeof(modelbuf));
1672
1673 if (dev->id[59] & 0x100)
1674 dev->multi_count = dev->id[59] & 0xff;
1675
Tejun Heo1148c3a2006-03-13 19:48:04 +09001676 if (ata_id_has_lba(id)) {
Tejun Heo4c2d7212006-03-05 17:55:58 +09001677 const char *lba_desc;
Tejun Heoa6e6ce82006-05-15 21:03:48 +09001678 char ncq_desc[20];
Albert Lee8bf62ec2005-05-12 15:29:42 -04001679
Tejun Heo4c2d7212006-03-05 17:55:58 +09001680 lba_desc = "LBA";
1681 dev->flags |= ATA_DFLAG_LBA;
Tejun Heo1148c3a2006-03-13 19:48:04 +09001682 if (ata_id_has_lba48(id)) {
Albert Lee8bf62ec2005-05-12 15:29:42 -04001683 dev->flags |= ATA_DFLAG_LBA48;
Tejun Heo4c2d7212006-03-05 17:55:58 +09001684 lba_desc = "LBA48";
Tejun Heo6fc49ad2006-11-11 20:10:45 +09001685
1686 if (dev->n_sectors >= (1UL << 28) &&
1687 ata_id_has_flush_ext(id))
1688 dev->flags |= ATA_DFLAG_FLUSH_EXT;
Tejun Heo4c2d7212006-03-05 17:55:58 +09001689 }
Albert Lee8bf62ec2005-05-12 15:29:42 -04001690
Tejun Heoa6e6ce82006-05-15 21:03:48 +09001691 /* config NCQ */
1692 ata_dev_config_ncq(dev, ncq_desc, sizeof(ncq_desc));
1693
Albert Lee8bf62ec2005-05-12 15:29:42 -04001694 /* print device info to dmesg */
Eric D. Mudama3f64f562007-01-30 23:00:40 -07001695 if (ata_msg_drv(ap) && print_info) {
1696 ata_dev_printk(dev, KERN_INFO,
1697 "%s: %s, %s, max %s\n",
1698 revbuf, modelbuf, fwrevbuf,
1699 ata_mode_string(xfer_mask));
1700 ata_dev_printk(dev, KERN_INFO,
1701 "%Lu sectors, multi %u: %s %s\n",
Tejun Heof15a1da2006-05-15 20:57:56 +09001702 (unsigned long long)dev->n_sectors,
Eric D. Mudama3f64f562007-01-30 23:00:40 -07001703 dev->multi_count, lba_desc, ncq_desc);
1704 }
Tejun Heoffeae412006-03-01 16:09:35 +09001705 } else {
Albert Lee8bf62ec2005-05-12 15:29:42 -04001706 /* CHS */
1707
1708 /* Default translation */
Tejun Heo1148c3a2006-03-13 19:48:04 +09001709 dev->cylinders = id[1];
1710 dev->heads = id[3];
1711 dev->sectors = id[6];
Albert Lee8bf62ec2005-05-12 15:29:42 -04001712
Tejun Heo1148c3a2006-03-13 19:48:04 +09001713 if (ata_id_current_chs_valid(id)) {
Albert Lee8bf62ec2005-05-12 15:29:42 -04001714 /* Current CHS translation is valid. */
Tejun Heo1148c3a2006-03-13 19:48:04 +09001715 dev->cylinders = id[54];
1716 dev->heads = id[55];
1717 dev->sectors = id[56];
Albert Lee8bf62ec2005-05-12 15:29:42 -04001718 }
1719
1720 /* print device info to dmesg */
Eric D. Mudama3f64f562007-01-30 23:00:40 -07001721 if (ata_msg_drv(ap) && print_info) {
Tejun Heo88574552006-06-25 20:00:35 +09001722 ata_dev_printk(dev, KERN_INFO,
Eric D. Mudama3f64f562007-01-30 23:00:40 -07001723 "%s: %s, %s, max %s\n",
1724 revbuf, modelbuf, fwrevbuf,
1725 ata_mode_string(xfer_mask));
Jeff Garzika84471f2007-02-26 05:51:33 -05001726 ata_dev_printk(dev, KERN_INFO,
Eric D. Mudama3f64f562007-01-30 23:00:40 -07001727 "%Lu sectors, multi %u, CHS %u/%u/%u\n",
1728 (unsigned long long)dev->n_sectors,
1729 dev->multi_count, dev->cylinders,
1730 dev->heads, dev->sectors);
1731 }
Albert Lee07f6f7d2005-11-01 19:33:20 +08001732 }
1733
Tejun Heo6e7846e2006-02-12 23:32:58 +09001734 dev->cdb_len = 16;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001735 }
1736
1737 /* ATAPI-specific feature tests */
Jeff Garzik2c13b7c2005-11-14 14:14:16 -05001738 else if (dev->class == ATA_DEV_ATAPI) {
Albert Lee08a556d2006-03-31 13:29:04 +08001739 char *cdb_intr_string = "";
1740
Tejun Heo1148c3a2006-03-13 19:48:04 +09001741 rc = atapi_cdb_len(id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001742 if ((rc < 12) || (rc > ATAPI_CDB_LEN)) {
Borislav Petkov0dd4b212006-06-23 02:29:08 -04001743 if (ata_msg_warn(ap))
Tejun Heo88574552006-06-25 20:00:35 +09001744 ata_dev_printk(dev, KERN_WARNING,
1745 "unsupported CDB len\n");
Tejun Heoffeae412006-03-01 16:09:35 +09001746 rc = -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001747 goto err_out_nosup;
1748 }
Tejun Heo6e7846e2006-02-12 23:32:58 +09001749 dev->cdb_len = (unsigned int) rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001750
Albert Lee08a556d2006-03-31 13:29:04 +08001751 if (ata_id_cdb_intr(dev->id)) {
Albert Lee312f7da2005-09-27 17:38:03 +08001752 dev->flags |= ATA_DFLAG_CDB_INTR;
Albert Lee08a556d2006-03-31 13:29:04 +08001753 cdb_intr_string = ", CDB intr";
1754 }
Albert Lee312f7da2005-09-27 17:38:03 +08001755
Linus Torvalds1da177e2005-04-16 15:20:36 -07001756 /* print device info to dmesg */
Borislav Petkov5afc8142006-06-27 14:51:25 +02001757 if (ata_msg_drv(ap) && print_info)
Tejun Heo12436c32006-05-15 20:59:15 +09001758 ata_dev_printk(dev, KERN_INFO, "ATAPI, max %s%s\n",
1759 ata_mode_string(xfer_mask),
1760 cdb_intr_string);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001761 }
1762
Tejun Heo914ed352006-11-01 18:39:55 +09001763 /* determine max_sectors */
1764 dev->max_sectors = ATA_MAX_SECTORS;
1765 if (dev->flags & ATA_DFLAG_LBA48)
1766 dev->max_sectors = ATA_MAX_SECTORS_LBA48;
1767
Alan Cox93590852006-09-12 16:55:12 +01001768 if (dev->horkage & ATA_HORKAGE_DIAGNOSTIC) {
1769 /* Let the user know. We don't want to disallow opens for
1770 rescue purposes, or in case the vendor is just a blithering
1771 idiot */
1772 if (print_info) {
1773 ata_dev_printk(dev, KERN_WARNING,
1774"Drive reports diagnostics failure. This may indicate a drive\n");
1775 ata_dev_printk(dev, KERN_WARNING,
1776"fault or invalid emulation. Contact drive vendor for information.\n");
1777 }
1778 }
1779
Tejun Heo4b2f3ed2006-03-01 16:09:36 +09001780 /* limit bridge transfers to udma5, 200 sectors */
Tejun Heo3373efd2006-05-15 20:57:53 +09001781 if (ata_dev_knobble(dev)) {
Borislav Petkov5afc8142006-06-27 14:51:25 +02001782 if (ata_msg_drv(ap) && print_info)
Tejun Heof15a1da2006-05-15 20:57:56 +09001783 ata_dev_printk(dev, KERN_INFO,
1784 "applying bridge limits\n");
Tejun Heo5a529132006-03-24 14:07:50 +09001785 dev->udma_mask &= ATA_UDMA5;
Tejun Heo4b2f3ed2006-03-01 16:09:36 +09001786 dev->max_sectors = ATA_MAX_SECTORS;
1787 }
1788
Albert Lee18d6e9d2007-04-02 11:34:15 +08001789 if (ata_device_blacklisted(dev) & ATA_HORKAGE_MAX_SEC_128)
Tejun Heo03ec52d2007-04-12 13:38:11 +09001790 dev->max_sectors = min_t(unsigned int, ATA_MAX_SECTORS_128,
1791 dev->max_sectors);
Albert Lee18d6e9d2007-04-02 11:34:15 +08001792
Albert Lee6f23a312007-04-02 11:39:25 +08001793 /* limit ATAPI DMA to R/W commands only */
1794 if (ata_device_blacklisted(dev) & ATA_HORKAGE_DMA_RW_ONLY)
1795 dev->horkage |= ATA_HORKAGE_DMA_RW_ONLY;
1796
Tejun Heo4b2f3ed2006-03-01 16:09:36 +09001797 if (ap->ops->dev_config)
Alancd0d3bb2007-03-02 00:56:15 +00001798 ap->ops->dev_config(dev);
Tejun Heo4b2f3ed2006-03-01 16:09:36 +09001799
Borislav Petkov0dd4b212006-06-23 02:29:08 -04001800 if (ata_msg_probe(ap))
1801 ata_dev_printk(dev, KERN_DEBUG, "%s: EXIT, drv_stat = 0x%x\n",
1802 __FUNCTION__, ata_chk_status(ap));
Tejun Heoffeae412006-03-01 16:09:35 +09001803 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001804
1805err_out_nosup:
Borislav Petkov0dd4b212006-06-23 02:29:08 -04001806 if (ata_msg_probe(ap))
Tejun Heo88574552006-06-25 20:00:35 +09001807 ata_dev_printk(dev, KERN_DEBUG,
1808 "%s: EXIT, err\n", __FUNCTION__);
Tejun Heoffeae412006-03-01 16:09:35 +09001809 return rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001810}
1811
1812/**
Alan Cox2e41e8e2007-03-08 23:19:19 +00001813 * ata_cable_40wire - return 40 wire cable type
Alan Coxbe0d18d2007-03-06 02:37:56 -08001814 * @ap: port
1815 *
Alan Cox2e41e8e2007-03-08 23:19:19 +00001816 * Helper method for drivers which want to hardwire 40 wire cable
Alan Coxbe0d18d2007-03-06 02:37:56 -08001817 * detection.
1818 */
1819
1820int ata_cable_40wire(struct ata_port *ap)
1821{
1822 return ATA_CBL_PATA40;
1823}
1824
1825/**
Alan Cox2e41e8e2007-03-08 23:19:19 +00001826 * ata_cable_80wire - return 80 wire cable type
Alan Coxbe0d18d2007-03-06 02:37:56 -08001827 * @ap: port
1828 *
Alan Cox2e41e8e2007-03-08 23:19:19 +00001829 * Helper method for drivers which want to hardwire 80 wire cable
Alan Coxbe0d18d2007-03-06 02:37:56 -08001830 * detection.
1831 */
1832
1833int ata_cable_80wire(struct ata_port *ap)
1834{
1835 return ATA_CBL_PATA80;
1836}
1837
1838/**
1839 * ata_cable_unknown - return unknown PATA cable.
1840 * @ap: port
1841 *
1842 * Helper method for drivers which have no PATA cable detection.
1843 */
1844
1845int ata_cable_unknown(struct ata_port *ap)
1846{
1847 return ATA_CBL_PATA_UNK;
1848}
1849
1850/**
1851 * ata_cable_sata - return SATA cable type
1852 * @ap: port
1853 *
1854 * Helper method for drivers which have SATA cables
1855 */
1856
1857int ata_cable_sata(struct ata_port *ap)
1858{
1859 return ATA_CBL_SATA;
1860}
1861
1862/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07001863 * ata_bus_probe - Reset and probe ATA bus
1864 * @ap: Bus to probe
1865 *
Jeff Garzik0cba6322005-05-30 19:49:12 -04001866 * Master ATA bus probing function. Initiates a hardware-dependent
1867 * bus reset, then attempts to identify any devices found on
1868 * the bus.
1869 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07001870 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04001871 * PCI/etc. bus probe sem.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001872 *
1873 * RETURNS:
Tejun Heo96072e62006-04-01 01:38:17 +09001874 * Zero on success, negative errno otherwise.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001875 */
1876
Brian King80289162006-08-07 14:27:31 -05001877int ata_bus_probe(struct ata_port *ap)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001878{
Tejun Heo28ca5c52006-03-01 16:09:36 +09001879 unsigned int classes[ATA_MAX_DEVICES];
Tejun Heo14d2bac2006-04-02 17:54:46 +09001880 int tries[ATA_MAX_DEVICES];
Tejun Heo4ae72a12007-02-02 16:22:30 +09001881 int i, rc;
Tejun Heoe82cbdb2006-04-01 01:38:18 +09001882 struct ata_device *dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001883
Tejun Heo28ca5c52006-03-01 16:09:36 +09001884 ata_port_probe(ap);
1885
Tejun Heo14d2bac2006-04-02 17:54:46 +09001886 for (i = 0; i < ATA_MAX_DEVICES; i++)
1887 tries[i] = ATA_PROBE_MAX_TRIES;
1888
1889 retry:
Tejun Heo20444702006-03-13 01:57:01 +09001890 /* reset and determine device classes */
Tejun Heo52783c52006-05-31 18:28:22 +09001891 ap->ops->phy_reset(ap);
Tejun Heo2061a472006-03-12 00:57:39 +09001892
Tejun Heo52783c52006-05-31 18:28:22 +09001893 for (i = 0; i < ATA_MAX_DEVICES; i++) {
1894 dev = &ap->device[i];
Tejun Heoc19ba8a2006-01-24 17:05:22 +09001895
Tejun Heo52783c52006-05-31 18:28:22 +09001896 if (!(ap->flags & ATA_FLAG_DISABLED) &&
1897 dev->class != ATA_DEV_UNKNOWN)
1898 classes[dev->devno] = dev->class;
1899 else
1900 classes[dev->devno] = ATA_DEV_NONE;
Tejun Heo20444702006-03-13 01:57:01 +09001901
Tejun Heo52783c52006-05-31 18:28:22 +09001902 dev->class = ATA_DEV_UNKNOWN;
Tejun Heo28ca5c52006-03-01 16:09:36 +09001903 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001904
Tejun Heo52783c52006-05-31 18:28:22 +09001905 ata_port_probe(ap);
Tejun Heo20444702006-03-13 01:57:01 +09001906
Alan Coxb6079ca2006-05-22 16:52:06 +01001907 /* after the reset the device state is PIO 0 and the controller
1908 state is undefined. Record the mode */
1909
1910 for (i = 0; i < ATA_MAX_DEVICES; i++)
1911 ap->device[i].pio_mode = XFER_PIO_0;
1912
Jeff Garzikf31f0cc2007-03-02 17:47:28 -05001913 /* read IDENTIFY page and configure devices. We have to do the identify
1914 specific sequence bass-ackwards so that PDIAG- is released by
1915 the slave device */
1916
1917 for (i = ATA_MAX_DEVICES - 1; i >= 0; i--) {
Tejun Heoe82cbdb2006-04-01 01:38:18 +09001918 dev = &ap->device[i];
Tejun Heo28ca5c52006-03-01 16:09:36 +09001919
Tejun Heoec573752006-04-11 22:26:29 +09001920 if (tries[i])
1921 dev->class = classes[i];
Tejun Heo14d2bac2006-04-02 17:54:46 +09001922
Tejun Heoe1211e32006-04-01 01:38:18 +09001923 if (!ata_dev_enabled(dev))
Tejun Heoffeae412006-03-01 16:09:35 +09001924 continue;
1925
Tejun Heobff04642006-11-10 18:08:10 +09001926 rc = ata_dev_read_id(dev, &dev->class, ATA_READID_POSTRESET,
1927 dev->id);
Tejun Heo14d2bac2006-04-02 17:54:46 +09001928 if (rc)
1929 goto fail;
Jeff Garzikf31f0cc2007-03-02 17:47:28 -05001930 }
1931
Alan Coxbe0d18d2007-03-06 02:37:56 -08001932 /* Now ask for the cable type as PDIAG- should have been released */
1933 if (ap->ops->cable_detect)
1934 ap->cbl = ap->ops->cable_detect(ap);
1935
Jeff Garzikf31f0cc2007-03-02 17:47:28 -05001936 /* After the identify sequence we can now set up the devices. We do
1937 this in the normal order so that the user doesn't get confused */
1938
1939 for(i = 0; i < ATA_MAX_DEVICES; i++) {
1940 dev = &ap->device[i];
1941 if (!ata_dev_enabled(dev))
1942 continue;
Tejun Heoffeae412006-03-01 16:09:35 +09001943
Tejun Heoefdaedc2006-11-01 18:38:52 +09001944 ap->eh_context.i.flags |= ATA_EHI_PRINTINFO;
1945 rc = ata_dev_configure(dev);
1946 ap->eh_context.i.flags &= ~ATA_EHI_PRINTINFO;
Tejun Heo14d2bac2006-04-02 17:54:46 +09001947 if (rc)
1948 goto fail;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001949 }
1950
Tejun Heoe82cbdb2006-04-01 01:38:18 +09001951 /* configure transfer mode */
Tejun Heo3adcebb2006-05-15 20:57:37 +09001952 rc = ata_set_mode(ap, &dev);
Tejun Heo4ae72a12007-02-02 16:22:30 +09001953 if (rc)
Tejun Heo51713d32006-04-11 22:26:29 +09001954 goto fail;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001955
Tejun Heoe82cbdb2006-04-01 01:38:18 +09001956 for (i = 0; i < ATA_MAX_DEVICES; i++)
1957 if (ata_dev_enabled(&ap->device[i]))
1958 return 0;
Alan Coxe35a9e02006-03-27 18:46:37 +01001959
Tejun Heoe82cbdb2006-04-01 01:38:18 +09001960 /* no device present, disable port */
1961 ata_port_disable(ap);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001962 ap->ops->port_disable(ap);
Tejun Heo96072e62006-04-01 01:38:17 +09001963 return -ENODEV;
Tejun Heo14d2bac2006-04-02 17:54:46 +09001964
1965 fail:
Tejun Heo4ae72a12007-02-02 16:22:30 +09001966 tries[dev->devno]--;
1967
Tejun Heo14d2bac2006-04-02 17:54:46 +09001968 switch (rc) {
1969 case -EINVAL:
Tejun Heo4ae72a12007-02-02 16:22:30 +09001970 /* eeek, something went very wrong, give up */
Tejun Heo14d2bac2006-04-02 17:54:46 +09001971 tries[dev->devno] = 0;
1972 break;
Tejun Heo4ae72a12007-02-02 16:22:30 +09001973
1974 case -ENODEV:
1975 /* give it just one more chance */
1976 tries[dev->devno] = min(tries[dev->devno], 1);
Tejun Heo14d2bac2006-04-02 17:54:46 +09001977 case -EIO:
Tejun Heo4ae72a12007-02-02 16:22:30 +09001978 if (tries[dev->devno] == 1) {
1979 /* This is the last chance, better to slow
1980 * down than lose it.
1981 */
1982 sata_down_spd_limit(ap);
1983 ata_down_xfermask_limit(dev, ATA_DNXFER_PIO);
1984 }
Tejun Heo14d2bac2006-04-02 17:54:46 +09001985 }
1986
Tejun Heo4ae72a12007-02-02 16:22:30 +09001987 if (!tries[dev->devno])
Tejun Heo3373efd2006-05-15 20:57:53 +09001988 ata_dev_disable(dev);
Tejun Heoec573752006-04-11 22:26:29 +09001989
Tejun Heo14d2bac2006-04-02 17:54:46 +09001990 goto retry;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001991}
1992
1993/**
Jeff Garzik0cba6322005-05-30 19:49:12 -04001994 * ata_port_probe - Mark port as enabled
1995 * @ap: Port for which we indicate enablement
Linus Torvalds1da177e2005-04-16 15:20:36 -07001996 *
Jeff Garzik0cba6322005-05-30 19:49:12 -04001997 * Modify @ap data structure such that the system
1998 * thinks that the entire port is enabled.
1999 *
Jeff Garzikcca39742006-08-24 03:19:22 -04002000 * LOCKING: host lock, or some other form of
Jeff Garzik0cba6322005-05-30 19:49:12 -04002001 * serialization.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002002 */
2003
2004void ata_port_probe(struct ata_port *ap)
2005{
Tejun Heo198e0fe2006-04-02 18:51:52 +09002006 ap->flags &= ~ATA_FLAG_DISABLED;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002007}
2008
2009/**
Tejun Heo3be680b2005-12-19 22:35:02 +09002010 * sata_print_link_status - Print SATA link status
2011 * @ap: SATA port to printk link status about
2012 *
2013 * This function prints link speed and status of a SATA link.
2014 *
2015 * LOCKING:
2016 * None.
2017 */
Jeff Garzik43727fb2007-02-25 16:50:52 -05002018void sata_print_link_status(struct ata_port *ap)
Tejun Heo3be680b2005-12-19 22:35:02 +09002019{
Tejun Heo6d5f9732006-04-03 00:09:41 +09002020 u32 sstatus, scontrol, tmp;
Tejun Heo3be680b2005-12-19 22:35:02 +09002021
Tejun Heo81952c52006-05-15 20:57:47 +09002022 if (sata_scr_read(ap, SCR_STATUS, &sstatus))
Tejun Heo3be680b2005-12-19 22:35:02 +09002023 return;
Tejun Heo81952c52006-05-15 20:57:47 +09002024 sata_scr_read(ap, SCR_CONTROL, &scontrol);
Tejun Heo3be680b2005-12-19 22:35:02 +09002025
Tejun Heo81952c52006-05-15 20:57:47 +09002026 if (ata_port_online(ap)) {
Tejun Heo3be680b2005-12-19 22:35:02 +09002027 tmp = (sstatus >> 4) & 0xf;
Tejun Heof15a1da2006-05-15 20:57:56 +09002028 ata_port_printk(ap, KERN_INFO,
2029 "SATA link up %s (SStatus %X SControl %X)\n",
2030 sata_spd_string(tmp), sstatus, scontrol);
Tejun Heo3be680b2005-12-19 22:35:02 +09002031 } else {
Tejun Heof15a1da2006-05-15 20:57:56 +09002032 ata_port_printk(ap, KERN_INFO,
2033 "SATA link down (SStatus %X SControl %X)\n",
2034 sstatus, scontrol);
Tejun Heo3be680b2005-12-19 22:35:02 +09002035 }
2036}
2037
2038/**
Jeff Garzik780a87f2005-05-30 15:41:05 -04002039 * __sata_phy_reset - Wake/reset a low-level SATA PHY
2040 * @ap: SATA port associated with target SATA PHY.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002041 *
Jeff Garzik780a87f2005-05-30 15:41:05 -04002042 * This function issues commands to standard SATA Sxxx
2043 * PHY registers, to wake up the phy (and device), and
2044 * clear any reset condition.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002045 *
2046 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04002047 * PCI/etc. bus probe sem.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002048 *
2049 */
2050void __sata_phy_reset(struct ata_port *ap)
2051{
2052 u32 sstatus;
2053 unsigned long timeout = jiffies + (HZ * 5);
2054
2055 if (ap->flags & ATA_FLAG_SATA_RESET) {
Brett Russcdcca892005-03-28 15:10:27 -05002056 /* issue phy wake/reset */
Tejun Heo81952c52006-05-15 20:57:47 +09002057 sata_scr_write_flush(ap, SCR_CONTROL, 0x301);
Tejun Heo62ba2842005-06-26 23:27:19 +09002058 /* Couldn't find anything in SATA I/II specs, but
2059 * AHCI-1.1 10.4.2 says at least 1 ms. */
2060 mdelay(1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002061 }
Tejun Heo81952c52006-05-15 20:57:47 +09002062 /* phy wake/clear reset */
2063 sata_scr_write_flush(ap, SCR_CONTROL, 0x300);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002064
2065 /* wait for phy to become ready, if necessary */
2066 do {
2067 msleep(200);
Tejun Heo81952c52006-05-15 20:57:47 +09002068 sata_scr_read(ap, SCR_STATUS, &sstatus);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002069 if ((sstatus & 0xf) != 1)
2070 break;
2071 } while (time_before(jiffies, timeout));
2072
Tejun Heo3be680b2005-12-19 22:35:02 +09002073 /* print link status */
2074 sata_print_link_status(ap);
Jeff Garzik656563e2005-11-20 03:36:45 -05002075
Tejun Heo3be680b2005-12-19 22:35:02 +09002076 /* TODO: phy layer with polling, timeouts, etc. */
Tejun Heo81952c52006-05-15 20:57:47 +09002077 if (!ata_port_offline(ap))
Linus Torvalds1da177e2005-04-16 15:20:36 -07002078 ata_port_probe(ap);
Tejun Heo3be680b2005-12-19 22:35:02 +09002079 else
Linus Torvalds1da177e2005-04-16 15:20:36 -07002080 ata_port_disable(ap);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002081
Tejun Heo198e0fe2006-04-02 18:51:52 +09002082 if (ap->flags & ATA_FLAG_DISABLED)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002083 return;
2084
2085 if (ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT)) {
2086 ata_port_disable(ap);
2087 return;
2088 }
2089
2090 ap->cbl = ATA_CBL_SATA;
2091}
2092
2093/**
Jeff Garzik780a87f2005-05-30 15:41:05 -04002094 * sata_phy_reset - Reset SATA bus.
2095 * @ap: SATA port associated with target SATA PHY.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002096 *
Jeff Garzik780a87f2005-05-30 15:41:05 -04002097 * This function resets the SATA bus, and then probes
2098 * the bus for devices.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002099 *
2100 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04002101 * PCI/etc. bus probe sem.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002102 *
2103 */
2104void sata_phy_reset(struct ata_port *ap)
2105{
2106 __sata_phy_reset(ap);
Tejun Heo198e0fe2006-04-02 18:51:52 +09002107 if (ap->flags & ATA_FLAG_DISABLED)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002108 return;
2109 ata_bus_reset(ap);
2110}
2111
2112/**
Alan Coxebdfca62006-03-23 15:38:34 +00002113 * ata_dev_pair - return other device on cable
Alan Coxebdfca62006-03-23 15:38:34 +00002114 * @adev: device
2115 *
2116 * Obtain the other device on the same cable, or if none is
2117 * present NULL is returned
2118 */
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05002119
Tejun Heo3373efd2006-05-15 20:57:53 +09002120struct ata_device *ata_dev_pair(struct ata_device *adev)
Alan Coxebdfca62006-03-23 15:38:34 +00002121{
Tejun Heo3373efd2006-05-15 20:57:53 +09002122 struct ata_port *ap = adev->ap;
Alan Coxebdfca62006-03-23 15:38:34 +00002123 struct ata_device *pair = &ap->device[1 - adev->devno];
Tejun Heoe1211e32006-04-01 01:38:18 +09002124 if (!ata_dev_enabled(pair))
Alan Coxebdfca62006-03-23 15:38:34 +00002125 return NULL;
2126 return pair;
2127}
2128
2129/**
Jeff Garzik780a87f2005-05-30 15:41:05 -04002130 * ata_port_disable - Disable port.
2131 * @ap: Port to be disabled.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002132 *
Jeff Garzik780a87f2005-05-30 15:41:05 -04002133 * Modify @ap data structure such that the system
2134 * thinks that the entire port is disabled, and should
2135 * never attempt to probe or communicate with devices
2136 * on this port.
2137 *
Jeff Garzikcca39742006-08-24 03:19:22 -04002138 * LOCKING: host lock, or some other form of
Jeff Garzik780a87f2005-05-30 15:41:05 -04002139 * serialization.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002140 */
2141
2142void ata_port_disable(struct ata_port *ap)
2143{
2144 ap->device[0].class = ATA_DEV_NONE;
2145 ap->device[1].class = ATA_DEV_NONE;
Tejun Heo198e0fe2006-04-02 18:51:52 +09002146 ap->flags |= ATA_FLAG_DISABLED;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002147}
2148
Tejun Heo1c3fae42006-04-02 20:53:28 +09002149/**
Tejun Heo3c567b72006-05-15 20:57:23 +09002150 * sata_down_spd_limit - adjust SATA spd limit downward
Tejun Heo1c3fae42006-04-02 20:53:28 +09002151 * @ap: Port to adjust SATA spd limit for
2152 *
2153 * Adjust SATA spd limit of @ap downward. Note that this
2154 * function only adjusts the limit. The change must be applied
Tejun Heo3c567b72006-05-15 20:57:23 +09002155 * using sata_set_spd().
Tejun Heo1c3fae42006-04-02 20:53:28 +09002156 *
2157 * LOCKING:
2158 * Inherited from caller.
2159 *
2160 * RETURNS:
2161 * 0 on success, negative errno on failure
2162 */
Tejun Heo3c567b72006-05-15 20:57:23 +09002163int sata_down_spd_limit(struct ata_port *ap)
Tejun Heo1c3fae42006-04-02 20:53:28 +09002164{
Tejun Heo81952c52006-05-15 20:57:47 +09002165 u32 sstatus, spd, mask;
2166 int rc, highbit;
Tejun Heo1c3fae42006-04-02 20:53:28 +09002167
Tejun Heo81952c52006-05-15 20:57:47 +09002168 rc = sata_scr_read(ap, SCR_STATUS, &sstatus);
2169 if (rc)
2170 return rc;
Tejun Heo1c3fae42006-04-02 20:53:28 +09002171
2172 mask = ap->sata_spd_limit;
2173 if (mask <= 1)
2174 return -EINVAL;
2175 highbit = fls(mask) - 1;
2176 mask &= ~(1 << highbit);
2177
Tejun Heo81952c52006-05-15 20:57:47 +09002178 spd = (sstatus >> 4) & 0xf;
Tejun Heo1c3fae42006-04-02 20:53:28 +09002179 if (spd <= 1)
2180 return -EINVAL;
2181 spd--;
2182 mask &= (1 << spd) - 1;
2183 if (!mask)
2184 return -EINVAL;
2185
2186 ap->sata_spd_limit = mask;
2187
Tejun Heof15a1da2006-05-15 20:57:56 +09002188 ata_port_printk(ap, KERN_WARNING, "limiting SATA link speed to %s\n",
2189 sata_spd_string(fls(mask)));
Tejun Heo1c3fae42006-04-02 20:53:28 +09002190
2191 return 0;
2192}
2193
Tejun Heo3c567b72006-05-15 20:57:23 +09002194static int __sata_set_spd_needed(struct ata_port *ap, u32 *scontrol)
Tejun Heo1c3fae42006-04-02 20:53:28 +09002195{
2196 u32 spd, limit;
2197
2198 if (ap->sata_spd_limit == UINT_MAX)
2199 limit = 0;
2200 else
2201 limit = fls(ap->sata_spd_limit);
2202
2203 spd = (*scontrol >> 4) & 0xf;
2204 *scontrol = (*scontrol & ~0xf0) | ((limit & 0xf) << 4);
2205
2206 return spd != limit;
2207}
2208
2209/**
Tejun Heo3c567b72006-05-15 20:57:23 +09002210 * sata_set_spd_needed - is SATA spd configuration needed
Tejun Heo1c3fae42006-04-02 20:53:28 +09002211 * @ap: Port in question
2212 *
2213 * Test whether the spd limit in SControl matches
2214 * @ap->sata_spd_limit. This function is used to determine
2215 * whether hardreset is necessary to apply SATA spd
2216 * configuration.
2217 *
2218 * LOCKING:
2219 * Inherited from caller.
2220 *
2221 * RETURNS:
2222 * 1 if SATA spd configuration is needed, 0 otherwise.
2223 */
Tejun Heo3c567b72006-05-15 20:57:23 +09002224int sata_set_spd_needed(struct ata_port *ap)
Tejun Heo1c3fae42006-04-02 20:53:28 +09002225{
2226 u32 scontrol;
2227
Tejun Heo81952c52006-05-15 20:57:47 +09002228 if (sata_scr_read(ap, SCR_CONTROL, &scontrol))
Tejun Heo1c3fae42006-04-02 20:53:28 +09002229 return 0;
2230
Tejun Heo3c567b72006-05-15 20:57:23 +09002231 return __sata_set_spd_needed(ap, &scontrol);
Tejun Heo1c3fae42006-04-02 20:53:28 +09002232}
2233
2234/**
Tejun Heo3c567b72006-05-15 20:57:23 +09002235 * sata_set_spd - set SATA spd according to spd limit
Tejun Heo1c3fae42006-04-02 20:53:28 +09002236 * @ap: Port to set SATA spd for
2237 *
2238 * Set SATA spd of @ap according to sata_spd_limit.
2239 *
2240 * LOCKING:
2241 * Inherited from caller.
2242 *
2243 * RETURNS:
2244 * 0 if spd doesn't need to be changed, 1 if spd has been
Tejun Heo81952c52006-05-15 20:57:47 +09002245 * changed. Negative errno if SCR registers are inaccessible.
Tejun Heo1c3fae42006-04-02 20:53:28 +09002246 */
Tejun Heo3c567b72006-05-15 20:57:23 +09002247int sata_set_spd(struct ata_port *ap)
Tejun Heo1c3fae42006-04-02 20:53:28 +09002248{
2249 u32 scontrol;
Tejun Heo81952c52006-05-15 20:57:47 +09002250 int rc;
Tejun Heo1c3fae42006-04-02 20:53:28 +09002251
Tejun Heo81952c52006-05-15 20:57:47 +09002252 if ((rc = sata_scr_read(ap, SCR_CONTROL, &scontrol)))
2253 return rc;
Tejun Heo1c3fae42006-04-02 20:53:28 +09002254
Tejun Heo3c567b72006-05-15 20:57:23 +09002255 if (!__sata_set_spd_needed(ap, &scontrol))
Tejun Heo1c3fae42006-04-02 20:53:28 +09002256 return 0;
2257
Tejun Heo81952c52006-05-15 20:57:47 +09002258 if ((rc = sata_scr_write(ap, SCR_CONTROL, scontrol)))
2259 return rc;
2260
Tejun Heo1c3fae42006-04-02 20:53:28 +09002261 return 1;
2262}
2263
Alan Cox452503f2005-10-21 19:01:32 -04002264/*
2265 * This mode timing computation functionality is ported over from
2266 * drivers/ide/ide-timing.h and was originally written by Vojtech Pavlik
2267 */
2268/*
Alan Coxb352e572006-08-10 18:52:12 +01002269 * PIO 0-4, MWDMA 0-2 and UDMA 0-6 timings (in nanoseconds).
Alan Cox452503f2005-10-21 19:01:32 -04002270 * These were taken from ATA/ATAPI-6 standard, rev 0a, except
Alan Coxb352e572006-08-10 18:52:12 +01002271 * for UDMA6, which is currently supported only by Maxtor drives.
2272 *
2273 * For PIO 5/6 MWDMA 3/4 see the CFA specification 3.0.
Alan Cox452503f2005-10-21 19:01:32 -04002274 */
2275
2276static const struct ata_timing ata_timing[] = {
2277
2278 { XFER_UDMA_6, 0, 0, 0, 0, 0, 0, 0, 15 },
2279 { XFER_UDMA_5, 0, 0, 0, 0, 0, 0, 0, 20 },
2280 { XFER_UDMA_4, 0, 0, 0, 0, 0, 0, 0, 30 },
2281 { XFER_UDMA_3, 0, 0, 0, 0, 0, 0, 0, 45 },
2282
Alan Coxb352e572006-08-10 18:52:12 +01002283 { XFER_MW_DMA_4, 25, 0, 0, 0, 55, 20, 80, 0 },
2284 { XFER_MW_DMA_3, 25, 0, 0, 0, 65, 25, 100, 0 },
Alan Cox452503f2005-10-21 19:01:32 -04002285 { XFER_UDMA_2, 0, 0, 0, 0, 0, 0, 0, 60 },
2286 { XFER_UDMA_1, 0, 0, 0, 0, 0, 0, 0, 80 },
2287 { XFER_UDMA_0, 0, 0, 0, 0, 0, 0, 0, 120 },
2288
2289/* { XFER_UDMA_SLOW, 0, 0, 0, 0, 0, 0, 0, 150 }, */
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05002290
Alan Cox452503f2005-10-21 19:01:32 -04002291 { XFER_MW_DMA_2, 25, 0, 0, 0, 70, 25, 120, 0 },
2292 { XFER_MW_DMA_1, 45, 0, 0, 0, 80, 50, 150, 0 },
2293 { XFER_MW_DMA_0, 60, 0, 0, 0, 215, 215, 480, 0 },
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05002294
Alan Cox452503f2005-10-21 19:01:32 -04002295 { XFER_SW_DMA_2, 60, 0, 0, 0, 120, 120, 240, 0 },
2296 { XFER_SW_DMA_1, 90, 0, 0, 0, 240, 240, 480, 0 },
2297 { XFER_SW_DMA_0, 120, 0, 0, 0, 480, 480, 960, 0 },
2298
Alan Coxb352e572006-08-10 18:52:12 +01002299 { XFER_PIO_6, 10, 55, 20, 80, 55, 20, 80, 0 },
2300 { XFER_PIO_5, 15, 65, 25, 100, 65, 25, 100, 0 },
Alan Cox452503f2005-10-21 19:01:32 -04002301 { XFER_PIO_4, 25, 70, 25, 120, 70, 25, 120, 0 },
2302 { XFER_PIO_3, 30, 80, 70, 180, 80, 70, 180, 0 },
2303
2304 { XFER_PIO_2, 30, 290, 40, 330, 100, 90, 240, 0 },
2305 { XFER_PIO_1, 50, 290, 93, 383, 125, 100, 383, 0 },
2306 { XFER_PIO_0, 70, 290, 240, 600, 165, 150, 600, 0 },
2307
2308/* { XFER_PIO_SLOW, 120, 290, 240, 960, 290, 240, 960, 0 }, */
2309
2310 { 0xFF }
2311};
2312
2313#define ENOUGH(v,unit) (((v)-1)/(unit)+1)
2314#define EZ(v,unit) ((v)?ENOUGH(v,unit):0)
2315
2316static void ata_timing_quantize(const struct ata_timing *t, struct ata_timing *q, int T, int UT)
2317{
2318 q->setup = EZ(t->setup * 1000, T);
2319 q->act8b = EZ(t->act8b * 1000, T);
2320 q->rec8b = EZ(t->rec8b * 1000, T);
2321 q->cyc8b = EZ(t->cyc8b * 1000, T);
2322 q->active = EZ(t->active * 1000, T);
2323 q->recover = EZ(t->recover * 1000, T);
2324 q->cycle = EZ(t->cycle * 1000, T);
2325 q->udma = EZ(t->udma * 1000, UT);
2326}
2327
2328void ata_timing_merge(const struct ata_timing *a, const struct ata_timing *b,
2329 struct ata_timing *m, unsigned int what)
2330{
2331 if (what & ATA_TIMING_SETUP ) m->setup = max(a->setup, b->setup);
2332 if (what & ATA_TIMING_ACT8B ) m->act8b = max(a->act8b, b->act8b);
2333 if (what & ATA_TIMING_REC8B ) m->rec8b = max(a->rec8b, b->rec8b);
2334 if (what & ATA_TIMING_CYC8B ) m->cyc8b = max(a->cyc8b, b->cyc8b);
2335 if (what & ATA_TIMING_ACTIVE ) m->active = max(a->active, b->active);
2336 if (what & ATA_TIMING_RECOVER) m->recover = max(a->recover, b->recover);
2337 if (what & ATA_TIMING_CYCLE ) m->cycle = max(a->cycle, b->cycle);
2338 if (what & ATA_TIMING_UDMA ) m->udma = max(a->udma, b->udma);
2339}
2340
2341static const struct ata_timing* ata_timing_find_mode(unsigned short speed)
2342{
2343 const struct ata_timing *t;
2344
2345 for (t = ata_timing; t->mode != speed; t++)
Alan Cox91190752005-10-26 12:17:46 -04002346 if (t->mode == 0xFF)
Alan Cox452503f2005-10-21 19:01:32 -04002347 return NULL;
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05002348 return t;
Alan Cox452503f2005-10-21 19:01:32 -04002349}
2350
2351int ata_timing_compute(struct ata_device *adev, unsigned short speed,
2352 struct ata_timing *t, int T, int UT)
2353{
2354 const struct ata_timing *s;
2355 struct ata_timing p;
2356
2357 /*
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05002358 * Find the mode.
Albert Lee75b1f2f2005-11-16 17:06:18 +08002359 */
Alan Cox452503f2005-10-21 19:01:32 -04002360
2361 if (!(s = ata_timing_find_mode(speed)))
2362 return -EINVAL;
2363
Albert Lee75b1f2f2005-11-16 17:06:18 +08002364 memcpy(t, s, sizeof(*s));
2365
Alan Cox452503f2005-10-21 19:01:32 -04002366 /*
2367 * If the drive is an EIDE drive, it can tell us it needs extended
2368 * PIO/MW_DMA cycle timing.
2369 */
2370
2371 if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE drive */
2372 memset(&p, 0, sizeof(p));
2373 if(speed >= XFER_PIO_0 && speed <= XFER_SW_DMA_0) {
2374 if (speed <= XFER_PIO_2) p.cycle = p.cyc8b = adev->id[ATA_ID_EIDE_PIO];
2375 else p.cycle = p.cyc8b = adev->id[ATA_ID_EIDE_PIO_IORDY];
2376 } else if(speed >= XFER_MW_DMA_0 && speed <= XFER_MW_DMA_2) {
2377 p.cycle = adev->id[ATA_ID_EIDE_DMA_MIN];
2378 }
2379 ata_timing_merge(&p, t, t, ATA_TIMING_CYCLE | ATA_TIMING_CYC8B);
2380 }
2381
2382 /*
2383 * Convert the timing to bus clock counts.
2384 */
2385
Albert Lee75b1f2f2005-11-16 17:06:18 +08002386 ata_timing_quantize(t, t, T, UT);
Alan Cox452503f2005-10-21 19:01:32 -04002387
2388 /*
Randy Dunlapc893a3a2006-01-28 13:15:32 -05002389 * Even in DMA/UDMA modes we still use PIO access for IDENTIFY,
2390 * S.M.A.R.T * and some other commands. We have to ensure that the
2391 * DMA cycle timing is slower/equal than the fastest PIO timing.
Alan Cox452503f2005-10-21 19:01:32 -04002392 */
2393
Alanfd3367a2006-12-07 12:41:18 +00002394 if (speed > XFER_PIO_6) {
Alan Cox452503f2005-10-21 19:01:32 -04002395 ata_timing_compute(adev, adev->pio_mode, &p, T, UT);
2396 ata_timing_merge(&p, t, t, ATA_TIMING_ALL);
2397 }
2398
2399 /*
Randy Dunlapc893a3a2006-01-28 13:15:32 -05002400 * Lengthen active & recovery time so that cycle time is correct.
Alan Cox452503f2005-10-21 19:01:32 -04002401 */
2402
2403 if (t->act8b + t->rec8b < t->cyc8b) {
2404 t->act8b += (t->cyc8b - (t->act8b + t->rec8b)) / 2;
2405 t->rec8b = t->cyc8b - t->act8b;
2406 }
2407
2408 if (t->active + t->recover < t->cycle) {
2409 t->active += (t->cycle - (t->active + t->recover)) / 2;
2410 t->recover = t->cycle - t->active;
2411 }
2412
2413 return 0;
2414}
2415
Tejun Heocf176e12006-04-02 17:54:46 +09002416/**
2417 * ata_down_xfermask_limit - adjust dev xfer masks downward
Tejun Heocf176e12006-04-02 17:54:46 +09002418 * @dev: Device to adjust xfer masks
Tejun Heo458337d2007-02-02 16:22:30 +09002419 * @sel: ATA_DNXFER_* selector
Tejun Heocf176e12006-04-02 17:54:46 +09002420 *
2421 * Adjust xfer masks of @dev downward. Note that this function
2422 * does not apply the change. Invoking ata_set_mode() afterwards
2423 * will apply the limit.
2424 *
2425 * LOCKING:
2426 * Inherited from caller.
2427 *
2428 * RETURNS:
2429 * 0 on success, negative errno on failure
2430 */
Tejun Heo458337d2007-02-02 16:22:30 +09002431int ata_down_xfermask_limit(struct ata_device *dev, unsigned int sel)
Tejun Heocf176e12006-04-02 17:54:46 +09002432{
Tejun Heo458337d2007-02-02 16:22:30 +09002433 char buf[32];
2434 unsigned int orig_mask, xfer_mask;
2435 unsigned int pio_mask, mwdma_mask, udma_mask;
2436 int quiet, highbit;
Tejun Heocf176e12006-04-02 17:54:46 +09002437
Tejun Heo458337d2007-02-02 16:22:30 +09002438 quiet = !!(sel & ATA_DNXFER_QUIET);
2439 sel &= ~ATA_DNXFER_QUIET;
Tejun Heocf176e12006-04-02 17:54:46 +09002440
Tejun Heo458337d2007-02-02 16:22:30 +09002441 xfer_mask = orig_mask = ata_pack_xfermask(dev->pio_mask,
2442 dev->mwdma_mask,
2443 dev->udma_mask);
2444 ata_unpack_xfermask(xfer_mask, &pio_mask, &mwdma_mask, &udma_mask);
Tejun Heocf176e12006-04-02 17:54:46 +09002445
Tejun Heo458337d2007-02-02 16:22:30 +09002446 switch (sel) {
2447 case ATA_DNXFER_PIO:
2448 highbit = fls(pio_mask) - 1;
2449 pio_mask &= ~(1 << highbit);
2450 break;
2451
2452 case ATA_DNXFER_DMA:
2453 if (udma_mask) {
2454 highbit = fls(udma_mask) - 1;
2455 udma_mask &= ~(1 << highbit);
2456 if (!udma_mask)
2457 return -ENOENT;
2458 } else if (mwdma_mask) {
2459 highbit = fls(mwdma_mask) - 1;
2460 mwdma_mask &= ~(1 << highbit);
2461 if (!mwdma_mask)
2462 return -ENOENT;
2463 }
2464 break;
2465
2466 case ATA_DNXFER_40C:
2467 udma_mask &= ATA_UDMA_MASK_40C;
2468 break;
2469
2470 case ATA_DNXFER_FORCE_PIO0:
2471 pio_mask &= 1;
2472 case ATA_DNXFER_FORCE_PIO:
2473 mwdma_mask = 0;
2474 udma_mask = 0;
2475 break;
2476
Tejun Heo458337d2007-02-02 16:22:30 +09002477 default:
2478 BUG();
2479 }
2480
2481 xfer_mask &= ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask);
2482
2483 if (!(xfer_mask & ATA_MASK_PIO) || xfer_mask == orig_mask)
2484 return -ENOENT;
2485
2486 if (!quiet) {
2487 if (xfer_mask & (ATA_MASK_MWDMA | ATA_MASK_UDMA))
2488 snprintf(buf, sizeof(buf), "%s:%s",
2489 ata_mode_string(xfer_mask),
2490 ata_mode_string(xfer_mask & ATA_MASK_PIO));
2491 else
2492 snprintf(buf, sizeof(buf), "%s",
2493 ata_mode_string(xfer_mask));
2494
2495 ata_dev_printk(dev, KERN_WARNING,
2496 "limiting speed to %s\n", buf);
2497 }
Tejun Heocf176e12006-04-02 17:54:46 +09002498
2499 ata_unpack_xfermask(xfer_mask, &dev->pio_mask, &dev->mwdma_mask,
2500 &dev->udma_mask);
2501
Tejun Heocf176e12006-04-02 17:54:46 +09002502 return 0;
Tejun Heocf176e12006-04-02 17:54:46 +09002503}
2504
Tejun Heo3373efd2006-05-15 20:57:53 +09002505static int ata_dev_set_mode(struct ata_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002506{
Tejun Heobaa1e782006-11-01 18:39:27 +09002507 struct ata_eh_context *ehc = &dev->ap->eh_context;
Tejun Heo83206a22006-03-24 15:25:31 +09002508 unsigned int err_mask;
2509 int rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002510
Tejun Heoe8384602006-04-02 18:51:53 +09002511 dev->flags &= ~ATA_DFLAG_PIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002512 if (dev->xfer_shift == ATA_SHIFT_PIO)
2513 dev->flags |= ATA_DFLAG_PIO;
2514
Tejun Heo3373efd2006-05-15 20:57:53 +09002515 err_mask = ata_dev_set_xfermode(dev);
Alan11750a42007-02-05 16:28:30 +00002516 /* Old CFA may refuse this command, which is just fine */
2517 if (dev->xfer_shift == ATA_SHIFT_PIO && ata_id_is_cfa(dev->id))
2518 err_mask &= ~AC_ERR_DEV;
2519
Tejun Heo83206a22006-03-24 15:25:31 +09002520 if (err_mask) {
Tejun Heof15a1da2006-05-15 20:57:56 +09002521 ata_dev_printk(dev, KERN_ERR, "failed to set xfermode "
2522 "(err_mask=0x%x)\n", err_mask);
Tejun Heo83206a22006-03-24 15:25:31 +09002523 return -EIO;
2524 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002525
Tejun Heobaa1e782006-11-01 18:39:27 +09002526 ehc->i.flags |= ATA_EHI_POST_SETMODE;
Tejun Heo3373efd2006-05-15 20:57:53 +09002527 rc = ata_dev_revalidate(dev, 0);
Tejun Heobaa1e782006-11-01 18:39:27 +09002528 ehc->i.flags &= ~ATA_EHI_POST_SETMODE;
Tejun Heo5eb45c02006-04-02 18:51:52 +09002529 if (rc)
Tejun Heo83206a22006-03-24 15:25:31 +09002530 return rc;
Tejun Heo48a8a142006-03-05 17:55:58 +09002531
Tejun Heo23e71c32006-03-06 04:31:57 +09002532 DPRINTK("xfer_shift=%u, xfer_mode=0x%x\n",
2533 dev->xfer_shift, (int)dev->xfer_mode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002534
Tejun Heof15a1da2006-05-15 20:57:56 +09002535 ata_dev_printk(dev, KERN_INFO, "configured for %s\n",
2536 ata_mode_string(ata_xfer_mode2mask(dev->xfer_mode)));
Tejun Heo83206a22006-03-24 15:25:31 +09002537 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002538}
2539
Linus Torvalds1da177e2005-04-16 15:20:36 -07002540/**
Alan04351822007-03-06 02:37:52 -08002541 * ata_do_set_mode - Program timings and issue SET FEATURES - XFER
Linus Torvalds1da177e2005-04-16 15:20:36 -07002542 * @ap: port on which timings will be programmed
Tejun Heoe82cbdb2006-04-01 01:38:18 +09002543 * @r_failed_dev: out paramter for failed device
Linus Torvalds1da177e2005-04-16 15:20:36 -07002544 *
Alan04351822007-03-06 02:37:52 -08002545 * Standard implementation of the function used to tune and set
2546 * ATA device disk transfer mode (PIO3, UDMA6, etc.). If
2547 * ata_dev_set_mode() fails, pointer to the failing device is
Tejun Heoe82cbdb2006-04-01 01:38:18 +09002548 * returned in @r_failed_dev.
Jeff Garzik780a87f2005-05-30 15:41:05 -04002549 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07002550 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04002551 * PCI/etc. bus probe sem.
Tejun Heoe82cbdb2006-04-01 01:38:18 +09002552 *
2553 * RETURNS:
2554 * 0 on success, negative errno otherwise
Linus Torvalds1da177e2005-04-16 15:20:36 -07002555 */
Alan04351822007-03-06 02:37:52 -08002556
2557int ata_do_set_mode(struct ata_port *ap, struct ata_device **r_failed_dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002558{
Tejun Heoe8e06192006-04-01 01:38:18 +09002559 struct ata_device *dev;
Tejun Heoe82cbdb2006-04-01 01:38:18 +09002560 int i, rc = 0, used_dma = 0, found = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002561
Tejun Heo3adcebb2006-05-15 20:57:37 +09002562
Tejun Heoa6d5a512006-03-06 04:31:57 +09002563 /* step 1: calculate xfer_mask */
2564 for (i = 0; i < ATA_MAX_DEVICES; i++) {
Tejun Heoacf356b2006-03-24 14:07:50 +09002565 unsigned int pio_mask, dma_mask;
Tejun Heoa6d5a512006-03-06 04:31:57 +09002566
Tejun Heoe8e06192006-04-01 01:38:18 +09002567 dev = &ap->device[i];
2568
Tejun Heoe1211e32006-04-01 01:38:18 +09002569 if (!ata_dev_enabled(dev))
Tejun Heoa6d5a512006-03-06 04:31:57 +09002570 continue;
2571
Tejun Heo3373efd2006-05-15 20:57:53 +09002572 ata_dev_xfermask(dev);
Tejun Heoa6d5a512006-03-06 04:31:57 +09002573
Tejun Heoacf356b2006-03-24 14:07:50 +09002574 pio_mask = ata_pack_xfermask(dev->pio_mask, 0, 0);
2575 dma_mask = ata_pack_xfermask(0, dev->mwdma_mask, dev->udma_mask);
2576 dev->pio_mode = ata_xfer_mask2mode(pio_mask);
2577 dev->dma_mode = ata_xfer_mask2mode(dma_mask);
Alan Cox5444a6f2006-03-27 18:58:20 +01002578
Tejun Heo4f659772006-04-01 01:38:18 +09002579 found = 1;
Alan Cox5444a6f2006-03-27 18:58:20 +01002580 if (dev->dma_mode)
2581 used_dma = 1;
Tejun Heoa6d5a512006-03-06 04:31:57 +09002582 }
Tejun Heo4f659772006-04-01 01:38:18 +09002583 if (!found)
Tejun Heoe82cbdb2006-04-01 01:38:18 +09002584 goto out;
Tejun Heoa6d5a512006-03-06 04:31:57 +09002585
2586 /* step 2: always set host PIO timings */
Tejun Heoe8e06192006-04-01 01:38:18 +09002587 for (i = 0; i < ATA_MAX_DEVICES; i++) {
2588 dev = &ap->device[i];
2589 if (!ata_dev_enabled(dev))
2590 continue;
2591
2592 if (!dev->pio_mode) {
Tejun Heof15a1da2006-05-15 20:57:56 +09002593 ata_dev_printk(dev, KERN_WARNING, "no PIO support\n");
Tejun Heoe8e06192006-04-01 01:38:18 +09002594 rc = -EINVAL;
Tejun Heoe82cbdb2006-04-01 01:38:18 +09002595 goto out;
Tejun Heoe8e06192006-04-01 01:38:18 +09002596 }
2597
2598 dev->xfer_mode = dev->pio_mode;
2599 dev->xfer_shift = ATA_SHIFT_PIO;
2600 if (ap->ops->set_piomode)
2601 ap->ops->set_piomode(ap, dev);
2602 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002603
Tejun Heoa6d5a512006-03-06 04:31:57 +09002604 /* step 3: set host DMA timings */
Tejun Heoe8e06192006-04-01 01:38:18 +09002605 for (i = 0; i < ATA_MAX_DEVICES; i++) {
2606 dev = &ap->device[i];
2607
2608 if (!ata_dev_enabled(dev) || !dev->dma_mode)
2609 continue;
2610
2611 dev->xfer_mode = dev->dma_mode;
2612 dev->xfer_shift = ata_xfer_mode2shift(dev->dma_mode);
2613 if (ap->ops->set_dmamode)
2614 ap->ops->set_dmamode(ap, dev);
2615 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002616
2617 /* step 4: update devices' xfer mode */
Tejun Heo83206a22006-03-24 15:25:31 +09002618 for (i = 0; i < ATA_MAX_DEVICES; i++) {
Tejun Heoe8e06192006-04-01 01:38:18 +09002619 dev = &ap->device[i];
Linus Torvalds1da177e2005-04-16 15:20:36 -07002620
Alan18d90de2007-01-24 11:42:38 +00002621 /* don't update suspended devices' xfer mode */
Tejun Heo02670bf2006-07-03 16:07:26 +09002622 if (!ata_dev_ready(dev))
Tejun Heo83206a22006-03-24 15:25:31 +09002623 continue;
2624
Tejun Heo3373efd2006-05-15 20:57:53 +09002625 rc = ata_dev_set_mode(dev);
Tejun Heo5bbc53f2006-04-01 01:38:17 +09002626 if (rc)
Tejun Heoe82cbdb2006-04-01 01:38:18 +09002627 goto out;
Tejun Heo83206a22006-03-24 15:25:31 +09002628 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002629
Tejun Heoe8e06192006-04-01 01:38:18 +09002630 /* Record simplex status. If we selected DMA then the other
2631 * host channels are not permitted to do so.
Alan Cox5444a6f2006-03-27 18:58:20 +01002632 */
Jeff Garzikcca39742006-08-24 03:19:22 -04002633 if (used_dma && (ap->host->flags & ATA_HOST_SIMPLEX))
Alan032af1c2007-03-01 17:36:46 +00002634 ap->host->simplex_claimed = ap;
Alan Cox5444a6f2006-03-27 18:58:20 +01002635
Tejun Heoe8e06192006-04-01 01:38:18 +09002636 /* step5: chip specific finalisation */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002637 if (ap->ops->post_set_mode)
2638 ap->ops->post_set_mode(ap);
Tejun Heoe82cbdb2006-04-01 01:38:18 +09002639 out:
2640 if (rc)
2641 *r_failed_dev = dev;
2642 return rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002643}
2644
2645/**
Alan04351822007-03-06 02:37:52 -08002646 * ata_set_mode - Program timings and issue SET FEATURES - XFER
2647 * @ap: port on which timings will be programmed
2648 * @r_failed_dev: out paramter for failed device
2649 *
2650 * Set ATA device disk transfer mode (PIO3, UDMA6, etc.). If
2651 * ata_set_mode() fails, pointer to the failing device is
2652 * returned in @r_failed_dev.
2653 *
2654 * LOCKING:
2655 * PCI/etc. bus probe sem.
2656 *
2657 * RETURNS:
2658 * 0 on success, negative errno otherwise
2659 */
2660int ata_set_mode(struct ata_port *ap, struct ata_device **r_failed_dev)
2661{
2662 /* has private set_mode? */
2663 if (ap->ops->set_mode)
2664 return ap->ops->set_mode(ap, r_failed_dev);
2665 return ata_do_set_mode(ap, r_failed_dev);
2666}
2667
2668/**
Jeff Garzik1fdffbc2006-02-09 05:15:27 -05002669 * ata_tf_to_host - issue ATA taskfile to host controller
2670 * @ap: port to which command is being issued
2671 * @tf: ATA taskfile register set
2672 *
2673 * Issues ATA taskfile register set to ATA host controller,
2674 * with proper synchronization with interrupt handler and
2675 * other threads.
2676 *
2677 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04002678 * spin_lock_irqsave(host lock)
Jeff Garzik1fdffbc2006-02-09 05:15:27 -05002679 */
2680
2681static inline void ata_tf_to_host(struct ata_port *ap,
2682 const struct ata_taskfile *tf)
2683{
2684 ap->ops->tf_load(ap, tf);
2685 ap->ops->exec_command(ap, tf);
2686}
2687
2688/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07002689 * ata_busy_sleep - sleep until BSY clears, or timeout
2690 * @ap: port containing status register to be polled
2691 * @tmout_pat: impatience timeout
2692 * @tmout: overall timeout
2693 *
Jeff Garzik780a87f2005-05-30 15:41:05 -04002694 * Sleep until ATA Status register bit BSY clears,
2695 * or a timeout occurs.
2696 *
Tejun Heod1adc1b2006-10-09 18:32:15 +09002697 * LOCKING:
2698 * Kernel thread context (may sleep).
2699 *
2700 * RETURNS:
2701 * 0 on success, -errno otherwise.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002702 */
Tejun Heod1adc1b2006-10-09 18:32:15 +09002703int ata_busy_sleep(struct ata_port *ap,
2704 unsigned long tmout_pat, unsigned long tmout)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002705{
2706 unsigned long timer_start, timeout;
2707 u8 status;
2708
2709 status = ata_busy_wait(ap, ATA_BUSY, 300);
2710 timer_start = jiffies;
2711 timeout = timer_start + tmout_pat;
Tejun Heod1adc1b2006-10-09 18:32:15 +09002712 while (status != 0xff && (status & ATA_BUSY) &&
2713 time_before(jiffies, timeout)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002714 msleep(50);
2715 status = ata_busy_wait(ap, ATA_BUSY, 3);
2716 }
2717
Tejun Heod1adc1b2006-10-09 18:32:15 +09002718 if (status != 0xff && (status & ATA_BUSY))
Tejun Heof15a1da2006-05-15 20:57:56 +09002719 ata_port_printk(ap, KERN_WARNING,
Jeff Garzik35aa7a42006-09-28 06:50:24 -04002720 "port is slow to respond, please be patient "
2721 "(Status 0x%x)\n", status);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002722
2723 timeout = timer_start + tmout;
Tejun Heod1adc1b2006-10-09 18:32:15 +09002724 while (status != 0xff && (status & ATA_BUSY) &&
2725 time_before(jiffies, timeout)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002726 msleep(50);
2727 status = ata_chk_status(ap);
2728 }
2729
Tejun Heod1adc1b2006-10-09 18:32:15 +09002730 if (status == 0xff)
2731 return -ENODEV;
2732
Linus Torvalds1da177e2005-04-16 15:20:36 -07002733 if (status & ATA_BUSY) {
Tejun Heof15a1da2006-05-15 20:57:56 +09002734 ata_port_printk(ap, KERN_ERR, "port failed to respond "
Jeff Garzik35aa7a42006-09-28 06:50:24 -04002735 "(%lu secs, Status 0x%x)\n",
2736 tmout / HZ, status);
Tejun Heod1adc1b2006-10-09 18:32:15 +09002737 return -EBUSY;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002738 }
2739
2740 return 0;
2741}
2742
2743static void ata_bus_post_reset(struct ata_port *ap, unsigned int devmask)
2744{
2745 struct ata_ioports *ioaddr = &ap->ioaddr;
2746 unsigned int dev0 = devmask & (1 << 0);
2747 unsigned int dev1 = devmask & (1 << 1);
2748 unsigned long timeout;
2749
2750 /* if device 0 was found in ata_devchk, wait for its
2751 * BSY bit to clear
2752 */
2753 if (dev0)
2754 ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT);
2755
2756 /* if device 1 was found in ata_devchk, wait for
2757 * register access, then wait for BSY to clear
2758 */
2759 timeout = jiffies + ATA_TMOUT_BOOT;
2760 while (dev1) {
2761 u8 nsect, lbal;
2762
2763 ap->ops->dev_select(ap, 1);
Tejun Heo0d5ff562007-02-01 15:06:36 +09002764 nsect = ioread8(ioaddr->nsect_addr);
2765 lbal = ioread8(ioaddr->lbal_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002766 if ((nsect == 1) && (lbal == 1))
2767 break;
2768 if (time_after(jiffies, timeout)) {
2769 dev1 = 0;
2770 break;
2771 }
2772 msleep(50); /* give drive a breather */
2773 }
2774 if (dev1)
2775 ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT);
2776
2777 /* is all this really necessary? */
2778 ap->ops->dev_select(ap, 0);
2779 if (dev1)
2780 ap->ops->dev_select(ap, 1);
2781 if (dev0)
2782 ap->ops->dev_select(ap, 0);
2783}
2784
Linus Torvalds1da177e2005-04-16 15:20:36 -07002785static unsigned int ata_bus_softreset(struct ata_port *ap,
2786 unsigned int devmask)
2787{
2788 struct ata_ioports *ioaddr = &ap->ioaddr;
2789
Tejun Heo44877b42007-02-21 01:06:51 +09002790 DPRINTK("ata%u: bus reset via SRST\n", ap->print_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002791
2792 /* software reset. causes dev0 to be selected */
Tejun Heo0d5ff562007-02-01 15:06:36 +09002793 iowrite8(ap->ctl, ioaddr->ctl_addr);
2794 udelay(20); /* FIXME: flush */
2795 iowrite8(ap->ctl | ATA_SRST, ioaddr->ctl_addr);
2796 udelay(20); /* FIXME: flush */
2797 iowrite8(ap->ctl, ioaddr->ctl_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002798
2799 /* spec mandates ">= 2ms" before checking status.
2800 * We wait 150ms, because that was the magic delay used for
2801 * ATAPI devices in Hale Landis's ATADRVR, for the period of time
2802 * between when the ATA command register is written, and then
2803 * status is checked. Because waiting for "a while" before
2804 * checking status is fine, post SRST, we perform this magic
2805 * delay here as well.
Alan Cox09c7ad72006-03-22 15:52:40 +00002806 *
2807 * Old drivers/ide uses the 2mS rule and then waits for ready
Linus Torvalds1da177e2005-04-16 15:20:36 -07002808 */
2809 msleep(150);
2810
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05002811 /* Before we perform post reset processing we want to see if
Tejun Heo298a41c2006-03-25 02:58:13 +09002812 * the bus shows 0xFF because the odd clown forgets the D7
2813 * pulldown resistor.
2814 */
Tejun Heod1adc1b2006-10-09 18:32:15 +09002815 if (ata_check_status(ap) == 0xFF)
2816 return 0;
Alan Cox09c7ad72006-03-22 15:52:40 +00002817
Linus Torvalds1da177e2005-04-16 15:20:36 -07002818 ata_bus_post_reset(ap, devmask);
2819
2820 return 0;
2821}
2822
2823/**
2824 * ata_bus_reset - reset host port and associated ATA channel
2825 * @ap: port to reset
2826 *
2827 * This is typically the first time we actually start issuing
2828 * commands to the ATA channel. We wait for BSY to clear, then
2829 * issue EXECUTE DEVICE DIAGNOSTIC command, polling for its
2830 * result. Determine what devices, if any, are on the channel
2831 * by looking at the device 0/1 error register. Look at the signature
2832 * stored in each device's taskfile registers, to determine if
2833 * the device is ATA or ATAPI.
2834 *
2835 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04002836 * PCI/etc. bus probe sem.
Jeff Garzikcca39742006-08-24 03:19:22 -04002837 * Obtains host lock.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002838 *
2839 * SIDE EFFECTS:
Tejun Heo198e0fe2006-04-02 18:51:52 +09002840 * Sets ATA_FLAG_DISABLED if bus reset fails.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002841 */
2842
2843void ata_bus_reset(struct ata_port *ap)
2844{
2845 struct ata_ioports *ioaddr = &ap->ioaddr;
2846 unsigned int slave_possible = ap->flags & ATA_FLAG_SLAVE_POSS;
2847 u8 err;
Tejun Heoaec5c3c2006-03-25 01:33:34 +09002848 unsigned int dev0, dev1 = 0, devmask = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002849
Tejun Heo44877b42007-02-21 01:06:51 +09002850 DPRINTK("ENTER, host %u, port %u\n", ap->print_id, ap->port_no);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002851
2852 /* determine if device 0/1 are present */
2853 if (ap->flags & ATA_FLAG_SATA_RESET)
2854 dev0 = 1;
2855 else {
2856 dev0 = ata_devchk(ap, 0);
2857 if (slave_possible)
2858 dev1 = ata_devchk(ap, 1);
2859 }
2860
2861 if (dev0)
2862 devmask |= (1 << 0);
2863 if (dev1)
2864 devmask |= (1 << 1);
2865
2866 /* select device 0 again */
2867 ap->ops->dev_select(ap, 0);
2868
2869 /* issue bus reset */
2870 if (ap->flags & ATA_FLAG_SRST)
Tejun Heoaec5c3c2006-03-25 01:33:34 +09002871 if (ata_bus_softreset(ap, devmask))
2872 goto err_out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002873
2874 /*
2875 * determine by signature whether we have ATA or ATAPI devices
2876 */
Tejun Heob4dc7622006-01-24 17:05:22 +09002877 ap->device[0].class = ata_dev_try_classify(ap, 0, &err);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002878 if ((slave_possible) && (err != 0x81))
Tejun Heob4dc7622006-01-24 17:05:22 +09002879 ap->device[1].class = ata_dev_try_classify(ap, 1, &err);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002880
2881 /* re-enable interrupts */
Akira Iguchi83625002007-01-26 16:27:32 +09002882 ap->ops->irq_on(ap);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002883
2884 /* is double-select really necessary? */
2885 if (ap->device[1].class != ATA_DEV_NONE)
2886 ap->ops->dev_select(ap, 1);
2887 if (ap->device[0].class != ATA_DEV_NONE)
2888 ap->ops->dev_select(ap, 0);
2889
2890 /* if no devices were detected, disable this port */
2891 if ((ap->device[0].class == ATA_DEV_NONE) &&
2892 (ap->device[1].class == ATA_DEV_NONE))
2893 goto err_out;
2894
2895 if (ap->flags & (ATA_FLAG_SATA_RESET | ATA_FLAG_SRST)) {
2896 /* set up device control for ATA_FLAG_SATA_RESET */
Tejun Heo0d5ff562007-02-01 15:06:36 +09002897 iowrite8(ap->ctl, ioaddr->ctl_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002898 }
2899
2900 DPRINTK("EXIT\n");
2901 return;
2902
2903err_out:
Tejun Heof15a1da2006-05-15 20:57:56 +09002904 ata_port_printk(ap, KERN_ERR, "disabling port\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07002905 ap->ops->port_disable(ap);
2906
2907 DPRINTK("EXIT\n");
2908}
2909
Tejun Heod7bb4cc2006-05-31 18:27:46 +09002910/**
2911 * sata_phy_debounce - debounce SATA phy status
2912 * @ap: ATA port to debounce SATA phy status for
2913 * @params: timing parameters { interval, duratinon, timeout } in msec
2914 *
2915 * Make sure SStatus of @ap reaches stable state, determined by
2916 * holding the same value where DET is not 1 for @duration polled
2917 * every @interval, before @timeout. Timeout constraints the
2918 * beginning of the stable state. Because, after hot unplugging,
2919 * DET gets stuck at 1 on some controllers, this functions waits
2920 * until timeout then returns 0 if DET is stable at 1.
2921 *
2922 * LOCKING:
2923 * Kernel thread context (may sleep)
2924 *
2925 * RETURNS:
2926 * 0 on success, -errno on failure.
2927 */
2928int sata_phy_debounce(struct ata_port *ap, const unsigned long *params)
Tejun Heo7a7921e2006-02-02 18:20:00 +09002929{
Tejun Heod7bb4cc2006-05-31 18:27:46 +09002930 unsigned long interval_msec = params[0];
2931 unsigned long duration = params[1] * HZ / 1000;
2932 unsigned long timeout = jiffies + params[2] * HZ / 1000;
2933 unsigned long last_jiffies;
2934 u32 last, cur;
2935 int rc;
2936
2937 if ((rc = sata_scr_read(ap, SCR_STATUS, &cur)))
2938 return rc;
2939 cur &= 0xf;
2940
2941 last = cur;
2942 last_jiffies = jiffies;
2943
2944 while (1) {
2945 msleep(interval_msec);
2946 if ((rc = sata_scr_read(ap, SCR_STATUS, &cur)))
2947 return rc;
2948 cur &= 0xf;
2949
2950 /* DET stable? */
2951 if (cur == last) {
2952 if (cur == 1 && time_before(jiffies, timeout))
2953 continue;
2954 if (time_after(jiffies, last_jiffies + duration))
2955 return 0;
2956 continue;
2957 }
2958
2959 /* unstable, start over */
2960 last = cur;
2961 last_jiffies = jiffies;
2962
2963 /* check timeout */
2964 if (time_after(jiffies, timeout))
2965 return -EBUSY;
2966 }
2967}
2968
2969/**
2970 * sata_phy_resume - resume SATA phy
2971 * @ap: ATA port to resume SATA phy for
2972 * @params: timing parameters { interval, duratinon, timeout } in msec
2973 *
2974 * Resume SATA phy of @ap and debounce it.
2975 *
2976 * LOCKING:
2977 * Kernel thread context (may sleep)
2978 *
2979 * RETURNS:
2980 * 0 on success, -errno on failure.
2981 */
2982int sata_phy_resume(struct ata_port *ap, const unsigned long *params)
2983{
2984 u32 scontrol;
Tejun Heo81952c52006-05-15 20:57:47 +09002985 int rc;
Tejun Heo7a7921e2006-02-02 18:20:00 +09002986
Tejun Heo81952c52006-05-15 20:57:47 +09002987 if ((rc = sata_scr_read(ap, SCR_CONTROL, &scontrol)))
2988 return rc;
2989
Tejun Heo852ee162006-04-01 01:38:18 +09002990 scontrol = (scontrol & 0x0f0) | 0x300;
Tejun Heo81952c52006-05-15 20:57:47 +09002991
2992 if ((rc = sata_scr_write(ap, SCR_CONTROL, scontrol)))
2993 return rc;
Tejun Heo7a7921e2006-02-02 18:20:00 +09002994
Tejun Heod7bb4cc2006-05-31 18:27:46 +09002995 /* Some PHYs react badly if SStatus is pounded immediately
2996 * after resuming. Delay 200ms before debouncing.
2997 */
2998 msleep(200);
Tejun Heo7a7921e2006-02-02 18:20:00 +09002999
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003000 return sata_phy_debounce(ap, params);
Tejun Heo7a7921e2006-02-02 18:20:00 +09003001}
3002
Tejun Heof5914a42006-05-31 18:27:48 +09003003static void ata_wait_spinup(struct ata_port *ap)
3004{
3005 struct ata_eh_context *ehc = &ap->eh_context;
3006 unsigned long end, secs;
3007 int rc;
3008
3009 /* first, debounce phy if SATA */
3010 if (ap->cbl == ATA_CBL_SATA) {
Tejun Heoe9c83912006-07-03 16:07:26 +09003011 rc = sata_phy_debounce(ap, sata_deb_timing_hotplug);
Tejun Heof5914a42006-05-31 18:27:48 +09003012
3013 /* if debounced successfully and offline, no need to wait */
3014 if ((rc == 0 || rc == -EOPNOTSUPP) && ata_port_offline(ap))
3015 return;
3016 }
3017
3018 /* okay, let's give the drive time to spin up */
3019 end = ehc->i.hotplug_timestamp + ATA_SPINUP_WAIT * HZ / 1000;
3020 secs = ((end - jiffies) + HZ - 1) / HZ;
3021
3022 if (time_after(jiffies, end))
3023 return;
3024
3025 if (secs > 5)
3026 ata_port_printk(ap, KERN_INFO, "waiting for device to spin up "
3027 "(%lu secs)\n", secs);
3028
3029 schedule_timeout_uninterruptible(end - jiffies);
3030}
3031
3032/**
3033 * ata_std_prereset - prepare for reset
3034 * @ap: ATA port to be reset
3035 *
3036 * @ap is about to be reset. Initialize it.
3037 *
3038 * LOCKING:
3039 * Kernel thread context (may sleep)
3040 *
3041 * RETURNS:
3042 * 0 on success, -errno otherwise.
3043 */
3044int ata_std_prereset(struct ata_port *ap)
3045{
3046 struct ata_eh_context *ehc = &ap->eh_context;
Tejun Heoe9c83912006-07-03 16:07:26 +09003047 const unsigned long *timing = sata_ehc_deb_timing(ehc);
Tejun Heof5914a42006-05-31 18:27:48 +09003048 int rc;
3049
Tejun Heo28324302006-07-03 16:07:26 +09003050 /* handle link resume & hotplug spinup */
3051 if ((ehc->i.flags & ATA_EHI_RESUME_LINK) &&
3052 (ap->flags & ATA_FLAG_HRST_TO_RESUME))
3053 ehc->i.action |= ATA_EH_HARDRESET;
3054
3055 if ((ehc->i.flags & ATA_EHI_HOTPLUGGED) &&
3056 (ap->flags & ATA_FLAG_SKIP_D2H_BSY))
3057 ata_wait_spinup(ap);
Tejun Heof5914a42006-05-31 18:27:48 +09003058
3059 /* if we're about to do hardreset, nothing more to do */
3060 if (ehc->i.action & ATA_EH_HARDRESET)
3061 return 0;
3062
3063 /* if SATA, resume phy */
3064 if (ap->cbl == ATA_CBL_SATA) {
Tejun Heof5914a42006-05-31 18:27:48 +09003065 rc = sata_phy_resume(ap, timing);
3066 if (rc && rc != -EOPNOTSUPP) {
3067 /* phy resume failed */
3068 ata_port_printk(ap, KERN_WARNING, "failed to resume "
3069 "link for reset (errno=%d)\n", rc);
3070 return rc;
3071 }
3072 }
3073
3074 /* Wait for !BSY if the controller can wait for the first D2H
3075 * Reg FIS and we don't know that no device is attached.
3076 */
3077 if (!(ap->flags & ATA_FLAG_SKIP_D2H_BSY) && !ata_port_offline(ap))
3078 ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT);
3079
3080 return 0;
3081}
3082
Tejun Heoc2bd5802006-01-24 17:05:22 +09003083/**
3084 * ata_std_softreset - reset host port via ATA SRST
3085 * @ap: port to reset
Tejun Heoc2bd5802006-01-24 17:05:22 +09003086 * @classes: resulting classes of attached devices
3087 *
Tejun Heo52783c52006-05-31 18:28:22 +09003088 * Reset host port using ATA SRST.
Tejun Heoc2bd5802006-01-24 17:05:22 +09003089 *
3090 * LOCKING:
3091 * Kernel thread context (may sleep)
3092 *
3093 * RETURNS:
3094 * 0 on success, -errno otherwise.
3095 */
Tejun Heo2bf2cb22006-04-11 22:16:45 +09003096int ata_std_softreset(struct ata_port *ap, unsigned int *classes)
Tejun Heoc2bd5802006-01-24 17:05:22 +09003097{
3098 unsigned int slave_possible = ap->flags & ATA_FLAG_SLAVE_POSS;
3099 unsigned int devmask = 0, err_mask;
3100 u8 err;
3101
3102 DPRINTK("ENTER\n");
3103
Tejun Heo81952c52006-05-15 20:57:47 +09003104 if (ata_port_offline(ap)) {
Tejun Heo3a397462006-02-10 23:58:48 +09003105 classes[0] = ATA_DEV_NONE;
3106 goto out;
3107 }
3108
Tejun Heoc2bd5802006-01-24 17:05:22 +09003109 /* determine if device 0/1 are present */
3110 if (ata_devchk(ap, 0))
3111 devmask |= (1 << 0);
3112 if (slave_possible && ata_devchk(ap, 1))
3113 devmask |= (1 << 1);
3114
Tejun Heoc2bd5802006-01-24 17:05:22 +09003115 /* select device 0 again */
3116 ap->ops->dev_select(ap, 0);
3117
3118 /* issue bus reset */
3119 DPRINTK("about to softreset, devmask=%x\n", devmask);
3120 err_mask = ata_bus_softreset(ap, devmask);
3121 if (err_mask) {
Tejun Heof15a1da2006-05-15 20:57:56 +09003122 ata_port_printk(ap, KERN_ERR, "SRST failed (err_mask=0x%x)\n",
3123 err_mask);
Tejun Heoc2bd5802006-01-24 17:05:22 +09003124 return -EIO;
3125 }
3126
3127 /* determine by signature whether we have ATA or ATAPI devices */
3128 classes[0] = ata_dev_try_classify(ap, 0, &err);
3129 if (slave_possible && err != 0x81)
3130 classes[1] = ata_dev_try_classify(ap, 1, &err);
3131
Tejun Heo3a397462006-02-10 23:58:48 +09003132 out:
Tejun Heoc2bd5802006-01-24 17:05:22 +09003133 DPRINTK("EXIT, classes[0]=%u [1]=%u\n", classes[0], classes[1]);
3134 return 0;
3135}
3136
3137/**
Tejun Heob6103f62006-11-01 17:59:53 +09003138 * sata_port_hardreset - reset port via SATA phy reset
Tejun Heoc2bd5802006-01-24 17:05:22 +09003139 * @ap: port to reset
Tejun Heob6103f62006-11-01 17:59:53 +09003140 * @timing: timing parameters { interval, duratinon, timeout } in msec
Tejun Heoc2bd5802006-01-24 17:05:22 +09003141 *
3142 * SATA phy-reset host port using DET bits of SControl register.
Tejun Heoc2bd5802006-01-24 17:05:22 +09003143 *
3144 * LOCKING:
3145 * Kernel thread context (may sleep)
3146 *
3147 * RETURNS:
3148 * 0 on success, -errno otherwise.
3149 */
Tejun Heob6103f62006-11-01 17:59:53 +09003150int sata_port_hardreset(struct ata_port *ap, const unsigned long *timing)
Tejun Heoc2bd5802006-01-24 17:05:22 +09003151{
Tejun Heo852ee162006-04-01 01:38:18 +09003152 u32 scontrol;
Tejun Heo81952c52006-05-15 20:57:47 +09003153 int rc;
Tejun Heo852ee162006-04-01 01:38:18 +09003154
Tejun Heoc2bd5802006-01-24 17:05:22 +09003155 DPRINTK("ENTER\n");
3156
Tejun Heo3c567b72006-05-15 20:57:23 +09003157 if (sata_set_spd_needed(ap)) {
Tejun Heo1c3fae42006-04-02 20:53:28 +09003158 /* SATA spec says nothing about how to reconfigure
3159 * spd. To be on the safe side, turn off phy during
3160 * reconfiguration. This works for at least ICH7 AHCI
3161 * and Sil3124.
3162 */
Tejun Heo81952c52006-05-15 20:57:47 +09003163 if ((rc = sata_scr_read(ap, SCR_CONTROL, &scontrol)))
Tejun Heob6103f62006-11-01 17:59:53 +09003164 goto out;
Tejun Heo81952c52006-05-15 20:57:47 +09003165
Martin Hicksa34b6fc2006-07-05 15:06:13 -04003166 scontrol = (scontrol & 0x0f0) | 0x304;
Tejun Heo81952c52006-05-15 20:57:47 +09003167
3168 if ((rc = sata_scr_write(ap, SCR_CONTROL, scontrol)))
Tejun Heob6103f62006-11-01 17:59:53 +09003169 goto out;
Tejun Heo1c3fae42006-04-02 20:53:28 +09003170
Tejun Heo3c567b72006-05-15 20:57:23 +09003171 sata_set_spd(ap);
Tejun Heo1c3fae42006-04-02 20:53:28 +09003172 }
3173
3174 /* issue phy wake/reset */
Tejun Heo81952c52006-05-15 20:57:47 +09003175 if ((rc = sata_scr_read(ap, SCR_CONTROL, &scontrol)))
Tejun Heob6103f62006-11-01 17:59:53 +09003176 goto out;
Tejun Heo81952c52006-05-15 20:57:47 +09003177
Tejun Heo852ee162006-04-01 01:38:18 +09003178 scontrol = (scontrol & 0x0f0) | 0x301;
Tejun Heo81952c52006-05-15 20:57:47 +09003179
3180 if ((rc = sata_scr_write_flush(ap, SCR_CONTROL, scontrol)))
Tejun Heob6103f62006-11-01 17:59:53 +09003181 goto out;
Tejun Heoc2bd5802006-01-24 17:05:22 +09003182
Tejun Heo1c3fae42006-04-02 20:53:28 +09003183 /* Couldn't find anything in SATA I/II specs, but AHCI-1.1
Tejun Heoc2bd5802006-01-24 17:05:22 +09003184 * 10.4.2 says at least 1 ms.
3185 */
3186 msleep(1);
3187
Tejun Heo1c3fae42006-04-02 20:53:28 +09003188 /* bring phy back */
Tejun Heob6103f62006-11-01 17:59:53 +09003189 rc = sata_phy_resume(ap, timing);
3190 out:
3191 DPRINTK("EXIT, rc=%d\n", rc);
3192 return rc;
3193}
3194
3195/**
3196 * sata_std_hardreset - reset host port via SATA phy reset
3197 * @ap: port to reset
3198 * @class: resulting class of attached device
3199 *
3200 * SATA phy-reset host port using DET bits of SControl register,
3201 * wait for !BSY and classify the attached device.
3202 *
3203 * LOCKING:
3204 * Kernel thread context (may sleep)
3205 *
3206 * RETURNS:
3207 * 0 on success, -errno otherwise.
3208 */
3209int sata_std_hardreset(struct ata_port *ap, unsigned int *class)
3210{
3211 const unsigned long *timing = sata_ehc_deb_timing(&ap->eh_context);
3212 int rc;
3213
3214 DPRINTK("ENTER\n");
3215
3216 /* do hardreset */
3217 rc = sata_port_hardreset(ap, timing);
3218 if (rc) {
3219 ata_port_printk(ap, KERN_ERR,
3220 "COMRESET failed (errno=%d)\n", rc);
3221 return rc;
3222 }
Tejun Heoc2bd5802006-01-24 17:05:22 +09003223
Tejun Heoc2bd5802006-01-24 17:05:22 +09003224 /* TODO: phy layer with polling, timeouts, etc. */
Tejun Heo81952c52006-05-15 20:57:47 +09003225 if (ata_port_offline(ap)) {
Tejun Heoc2bd5802006-01-24 17:05:22 +09003226 *class = ATA_DEV_NONE;
3227 DPRINTK("EXIT, link offline\n");
3228 return 0;
3229 }
3230
Tejun Heo34fee222007-02-02 15:29:27 +09003231 /* wait a while before checking status, see SRST for more info */
3232 msleep(150);
3233
Tejun Heoc2bd5802006-01-24 17:05:22 +09003234 if (ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT)) {
Tejun Heof15a1da2006-05-15 20:57:56 +09003235 ata_port_printk(ap, KERN_ERR,
3236 "COMRESET failed (device not ready)\n");
Tejun Heoc2bd5802006-01-24 17:05:22 +09003237 return -EIO;
3238 }
3239
Tejun Heo3a397462006-02-10 23:58:48 +09003240 ap->ops->dev_select(ap, 0); /* probably unnecessary */
3241
Tejun Heoc2bd5802006-01-24 17:05:22 +09003242 *class = ata_dev_try_classify(ap, 0, NULL);
3243
3244 DPRINTK("EXIT, class=%u\n", *class);
3245 return 0;
3246}
3247
3248/**
3249 * ata_std_postreset - standard postreset callback
3250 * @ap: the target ata_port
3251 * @classes: classes of attached devices
3252 *
3253 * This function is invoked after a successful reset. Note that
3254 * the device might have been reset more than once using
3255 * different reset methods before postreset is invoked.
Tejun Heoc2bd5802006-01-24 17:05:22 +09003256 *
Tejun Heoc2bd5802006-01-24 17:05:22 +09003257 * LOCKING:
3258 * Kernel thread context (may sleep)
3259 */
3260void ata_std_postreset(struct ata_port *ap, unsigned int *classes)
3261{
Tejun Heodc2b3512006-05-15 20:58:00 +09003262 u32 serror;
3263
Tejun Heoc2bd5802006-01-24 17:05:22 +09003264 DPRINTK("ENTER\n");
3265
Tejun Heoc2bd5802006-01-24 17:05:22 +09003266 /* print link status */
Tejun Heo81952c52006-05-15 20:57:47 +09003267 sata_print_link_status(ap);
Tejun Heoc2bd5802006-01-24 17:05:22 +09003268
Tejun Heodc2b3512006-05-15 20:58:00 +09003269 /* clear SError */
3270 if (sata_scr_read(ap, SCR_ERROR, &serror) == 0)
3271 sata_scr_write(ap, SCR_ERROR, serror);
3272
Tejun Heo3a397462006-02-10 23:58:48 +09003273 /* re-enable interrupts */
Akira Iguchi83625002007-01-26 16:27:32 +09003274 if (!ap->ops->error_handler)
3275 ap->ops->irq_on(ap);
Tejun Heoc2bd5802006-01-24 17:05:22 +09003276
3277 /* is double-select really necessary? */
3278 if (classes[0] != ATA_DEV_NONE)
3279 ap->ops->dev_select(ap, 1);
3280 if (classes[1] != ATA_DEV_NONE)
3281 ap->ops->dev_select(ap, 0);
3282
Tejun Heo3a397462006-02-10 23:58:48 +09003283 /* bail out if no device is present */
3284 if (classes[0] == ATA_DEV_NONE && classes[1] == ATA_DEV_NONE) {
3285 DPRINTK("EXIT, no device\n");
3286 return;
3287 }
3288
3289 /* set up device control */
Tejun Heo0d5ff562007-02-01 15:06:36 +09003290 if (ap->ioaddr.ctl_addr)
3291 iowrite8(ap->ctl, ap->ioaddr.ctl_addr);
Tejun Heoc2bd5802006-01-24 17:05:22 +09003292
3293 DPRINTK("EXIT\n");
3294}
3295
Tejun Heoa62c0fc2006-01-24 17:05:22 +09003296/**
Tejun Heo623a3122006-03-05 17:55:58 +09003297 * ata_dev_same_device - Determine whether new ID matches configured device
Tejun Heo623a3122006-03-05 17:55:58 +09003298 * @dev: device to compare against
3299 * @new_class: class of the new device
3300 * @new_id: IDENTIFY page of the new device
3301 *
3302 * Compare @new_class and @new_id against @dev and determine
3303 * whether @dev is the device indicated by @new_class and
3304 * @new_id.
3305 *
3306 * LOCKING:
3307 * None.
3308 *
3309 * RETURNS:
3310 * 1 if @dev matches @new_class and @new_id, 0 otherwise.
3311 */
Tejun Heo3373efd2006-05-15 20:57:53 +09003312static int ata_dev_same_device(struct ata_device *dev, unsigned int new_class,
3313 const u16 *new_id)
Tejun Heo623a3122006-03-05 17:55:58 +09003314{
3315 const u16 *old_id = dev->id;
Tejun Heoa0cf7332007-01-02 20:18:49 +09003316 unsigned char model[2][ATA_ID_PROD_LEN + 1];
3317 unsigned char serial[2][ATA_ID_SERNO_LEN + 1];
Tejun Heo623a3122006-03-05 17:55:58 +09003318 u64 new_n_sectors;
3319
3320 if (dev->class != new_class) {
Tejun Heof15a1da2006-05-15 20:57:56 +09003321 ata_dev_printk(dev, KERN_INFO, "class mismatch %d != %d\n",
3322 dev->class, new_class);
Tejun Heo623a3122006-03-05 17:55:58 +09003323 return 0;
3324 }
3325
Tejun Heoa0cf7332007-01-02 20:18:49 +09003326 ata_id_c_string(old_id, model[0], ATA_ID_PROD, sizeof(model[0]));
3327 ata_id_c_string(new_id, model[1], ATA_ID_PROD, sizeof(model[1]));
3328 ata_id_c_string(old_id, serial[0], ATA_ID_SERNO, sizeof(serial[0]));
3329 ata_id_c_string(new_id, serial[1], ATA_ID_SERNO, sizeof(serial[1]));
Tejun Heo623a3122006-03-05 17:55:58 +09003330 new_n_sectors = ata_id_n_sectors(new_id);
3331
3332 if (strcmp(model[0], model[1])) {
Tejun Heof15a1da2006-05-15 20:57:56 +09003333 ata_dev_printk(dev, KERN_INFO, "model number mismatch "
3334 "'%s' != '%s'\n", model[0], model[1]);
Tejun Heo623a3122006-03-05 17:55:58 +09003335 return 0;
3336 }
3337
3338 if (strcmp(serial[0], serial[1])) {
Tejun Heof15a1da2006-05-15 20:57:56 +09003339 ata_dev_printk(dev, KERN_INFO, "serial number mismatch "
3340 "'%s' != '%s'\n", serial[0], serial[1]);
Tejun Heo623a3122006-03-05 17:55:58 +09003341 return 0;
3342 }
3343
3344 if (dev->class == ATA_DEV_ATA && dev->n_sectors != new_n_sectors) {
Tejun Heof15a1da2006-05-15 20:57:56 +09003345 ata_dev_printk(dev, KERN_INFO, "n_sectors mismatch "
3346 "%llu != %llu\n",
3347 (unsigned long long)dev->n_sectors,
3348 (unsigned long long)new_n_sectors);
Tejun Heo623a3122006-03-05 17:55:58 +09003349 return 0;
3350 }
3351
3352 return 1;
3353}
3354
3355/**
3356 * ata_dev_revalidate - Revalidate ATA device
Tejun Heo623a3122006-03-05 17:55:58 +09003357 * @dev: device to revalidate
Tejun Heobff04642006-11-10 18:08:10 +09003358 * @readid_flags: read ID flags
Tejun Heo623a3122006-03-05 17:55:58 +09003359 *
3360 * Re-read IDENTIFY page and make sure @dev is still attached to
3361 * the port.
3362 *
3363 * LOCKING:
3364 * Kernel thread context (may sleep)
3365 *
3366 * RETURNS:
3367 * 0 on success, negative errno otherwise
3368 */
Tejun Heobff04642006-11-10 18:08:10 +09003369int ata_dev_revalidate(struct ata_device *dev, unsigned int readid_flags)
Tejun Heo623a3122006-03-05 17:55:58 +09003370{
Tejun Heo5eb45c02006-04-02 18:51:52 +09003371 unsigned int class = dev->class;
Tejun Heof15a1da2006-05-15 20:57:56 +09003372 u16 *id = (void *)dev->ap->sector_buf;
Tejun Heo623a3122006-03-05 17:55:58 +09003373 int rc;
3374
Tejun Heo5eb45c02006-04-02 18:51:52 +09003375 if (!ata_dev_enabled(dev)) {
3376 rc = -ENODEV;
3377 goto fail;
3378 }
Tejun Heo623a3122006-03-05 17:55:58 +09003379
Tejun Heofe635c72006-05-15 20:57:35 +09003380 /* read ID data */
Tejun Heobff04642006-11-10 18:08:10 +09003381 rc = ata_dev_read_id(dev, &class, readid_flags, id);
Tejun Heo623a3122006-03-05 17:55:58 +09003382 if (rc)
3383 goto fail;
3384
3385 /* is the device still there? */
Tejun Heo3373efd2006-05-15 20:57:53 +09003386 if (!ata_dev_same_device(dev, class, id)) {
Tejun Heo623a3122006-03-05 17:55:58 +09003387 rc = -ENODEV;
3388 goto fail;
3389 }
3390
Tejun Heofe635c72006-05-15 20:57:35 +09003391 memcpy(dev->id, id, sizeof(id[0]) * ATA_ID_WORDS);
Tejun Heo623a3122006-03-05 17:55:58 +09003392
3393 /* configure device according to the new ID */
Tejun Heoefdaedc2006-11-01 18:38:52 +09003394 rc = ata_dev_configure(dev);
Tejun Heo5eb45c02006-04-02 18:51:52 +09003395 if (rc == 0)
3396 return 0;
Tejun Heo623a3122006-03-05 17:55:58 +09003397
3398 fail:
Tejun Heof15a1da2006-05-15 20:57:56 +09003399 ata_dev_printk(dev, KERN_ERR, "revalidation failed (errno=%d)\n", rc);
Tejun Heo623a3122006-03-05 17:55:58 +09003400 return rc;
3401}
3402
Alan Cox6919a0a2006-10-27 19:08:46 -07003403struct ata_blacklist_entry {
3404 const char *model_num;
3405 const char *model_rev;
3406 unsigned long horkage;
3407};
3408
3409static const struct ata_blacklist_entry ata_device_blacklist [] = {
3410 /* Devices with DMA related problems under Linux */
3411 { "WDC AC11000H", NULL, ATA_HORKAGE_NODMA },
3412 { "WDC AC22100H", NULL, ATA_HORKAGE_NODMA },
3413 { "WDC AC32500H", NULL, ATA_HORKAGE_NODMA },
3414 { "WDC AC33100H", NULL, ATA_HORKAGE_NODMA },
3415 { "WDC AC31600H", NULL, ATA_HORKAGE_NODMA },
3416 { "WDC AC32100H", "24.09P07", ATA_HORKAGE_NODMA },
3417 { "WDC AC23200L", "21.10N21", ATA_HORKAGE_NODMA },
3418 { "Compaq CRD-8241B", NULL, ATA_HORKAGE_NODMA },
3419 { "CRD-8400B", NULL, ATA_HORKAGE_NODMA },
3420 { "CRD-8480B", NULL, ATA_HORKAGE_NODMA },
3421 { "CRD-8482B", NULL, ATA_HORKAGE_NODMA },
3422 { "CRD-84", NULL, ATA_HORKAGE_NODMA },
3423 { "SanDisk SDP3B", NULL, ATA_HORKAGE_NODMA },
3424 { "SanDisk SDP3B-64", NULL, ATA_HORKAGE_NODMA },
3425 { "SANYO CD-ROM CRD", NULL, ATA_HORKAGE_NODMA },
3426 { "HITACHI CDR-8", NULL, ATA_HORKAGE_NODMA },
3427 { "HITACHI CDR-8335", NULL, ATA_HORKAGE_NODMA },
3428 { "HITACHI CDR-8435", NULL, ATA_HORKAGE_NODMA },
3429 { "Toshiba CD-ROM XM-6202B", NULL, ATA_HORKAGE_NODMA },
3430 { "TOSHIBA CD-ROM XM-1702BC", NULL, ATA_HORKAGE_NODMA },
3431 { "CD-532E-A", NULL, ATA_HORKAGE_NODMA },
3432 { "E-IDE CD-ROM CR-840",NULL, ATA_HORKAGE_NODMA },
3433 { "CD-ROM Drive/F5A", NULL, ATA_HORKAGE_NODMA },
3434 { "WPI CDD-820", NULL, ATA_HORKAGE_NODMA },
3435 { "SAMSUNG CD-ROM SC-148C", NULL, ATA_HORKAGE_NODMA },
3436 { "SAMSUNG CD-ROM SC", NULL, ATA_HORKAGE_NODMA },
Alan Cox6919a0a2006-10-27 19:08:46 -07003437 { "ATAPI CD-ROM DRIVE 40X MAXIMUM",NULL,ATA_HORKAGE_NODMA },
3438 { "_NEC DV5800A", NULL, ATA_HORKAGE_NODMA },
3439 { "SAMSUNG CD-ROM SN-124","N001", ATA_HORKAGE_NODMA },
3440
Albert Lee18d6e9d2007-04-02 11:34:15 +08003441 /* Weird ATAPI devices */
Albert Lee6f23a312007-04-02 11:39:25 +08003442 { "TORiSAN DVD-ROM DRD-N216", NULL, ATA_HORKAGE_MAX_SEC_128 |
3443 ATA_HORKAGE_DMA_RW_ONLY },
Albert Lee18d6e9d2007-04-02 11:34:15 +08003444
Alan Cox6919a0a2006-10-27 19:08:46 -07003445 /* Devices we expect to fail diagnostics */
3446
3447 /* Devices where NCQ should be avoided */
3448 /* NCQ is slow */
3449 { "WDC WD740ADFD-00", NULL, ATA_HORKAGE_NONCQ },
Tejun Heo09125ea2007-02-28 15:21:23 +09003450 /* http://thread.gmane.org/gmane.linux.ide/14907 */
3451 { "FUJITSU MHT2060BH", NULL, ATA_HORKAGE_NONCQ },
Paul Rolland7acfaf32007-03-26 21:43:44 -08003452 /* NCQ is broken */
3453 { "Maxtor 6L250S0", "BANC1G10", ATA_HORKAGE_NONCQ },
Jens Axboe96442922007-03-30 09:27:58 +02003454 /* NCQ hard hangs device under heavier load, needs hard power cycle */
3455 { "Maxtor 6B250S0", "BANC1B70", ATA_HORKAGE_NONCQ },
Robert Hancock36e337d2007-04-02 22:05:29 -06003456 /* Blacklist entries taken from Silicon Image 3124/3132
3457 Windows driver .inf file - also several Linux problem reports */
3458 { "HTS541060G9SA00", "MB3OC60D", ATA_HORKAGE_NONCQ, },
3459 { "HTS541080G9SA00", "MB4OC60D", ATA_HORKAGE_NONCQ, },
3460 { "HTS541010G9SA00", "MBZOC60D", ATA_HORKAGE_NONCQ, },
Alan Cox6919a0a2006-10-27 19:08:46 -07003461
3462 /* Devices with NCQ limits */
3463
3464 /* End Marker */
3465 { }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003466};
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05003467
Alan Cox6919a0a2006-10-27 19:08:46 -07003468unsigned long ata_device_blacklisted(const struct ata_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003469{
Tejun Heo8bfa79f2007-01-02 20:19:40 +09003470 unsigned char model_num[ATA_ID_PROD_LEN + 1];
3471 unsigned char model_rev[ATA_ID_FW_REV_LEN + 1];
Alan Cox6919a0a2006-10-27 19:08:46 -07003472 const struct ata_blacklist_entry *ad = ata_device_blacklist;
Albert Lee3a778272006-06-22 13:00:25 +08003473
Tejun Heo8bfa79f2007-01-02 20:19:40 +09003474 ata_id_c_string(dev->id, model_num, ATA_ID_PROD, sizeof(model_num));
3475 ata_id_c_string(dev->id, model_rev, ATA_ID_FW_REV, sizeof(model_rev));
Linus Torvalds1da177e2005-04-16 15:20:36 -07003476
Alan Cox6919a0a2006-10-27 19:08:46 -07003477 while (ad->model_num) {
Tejun Heo8bfa79f2007-01-02 20:19:40 +09003478 if (!strcmp(ad->model_num, model_num)) {
Alan Cox6919a0a2006-10-27 19:08:46 -07003479 if (ad->model_rev == NULL)
3480 return ad->horkage;
Tejun Heo8bfa79f2007-01-02 20:19:40 +09003481 if (!strcmp(ad->model_rev, model_rev))
Alan Cox6919a0a2006-10-27 19:08:46 -07003482 return ad->horkage;
Alan Coxf4b15fe2006-03-22 15:54:04 +00003483 }
Alan Cox6919a0a2006-10-27 19:08:46 -07003484 ad++;
Alan Coxf4b15fe2006-03-22 15:54:04 +00003485 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003486 return 0;
3487}
3488
Alan Cox6919a0a2006-10-27 19:08:46 -07003489static int ata_dma_blacklisted(const struct ata_device *dev)
3490{
3491 /* We don't support polling DMA.
3492 * DMA blacklist those ATAPI devices with CDB-intr (and use PIO)
3493 * if the LLDD handles only interrupts in the HSM_ST_LAST state.
3494 */
3495 if ((dev->ap->flags & ATA_FLAG_PIO_POLLING) &&
3496 (dev->flags & ATA_DFLAG_CDB_INTR))
3497 return 1;
3498 return (ata_device_blacklisted(dev) & ATA_HORKAGE_NODMA) ? 1 : 0;
3499}
3500
Tejun Heoa6d5a512006-03-06 04:31:57 +09003501/**
3502 * ata_dev_xfermask - Compute supported xfermask of the given device
Tejun Heoa6d5a512006-03-06 04:31:57 +09003503 * @dev: Device to compute xfermask for
3504 *
Tejun Heoacf356b2006-03-24 14:07:50 +09003505 * Compute supported xfermask of @dev and store it in
3506 * dev->*_mask. This function is responsible for applying all
3507 * known limits including host controller limits, device
3508 * blacklist, etc...
Tejun Heoa6d5a512006-03-06 04:31:57 +09003509 *
3510 * LOCKING:
3511 * None.
Tejun Heoa6d5a512006-03-06 04:31:57 +09003512 */
Tejun Heo3373efd2006-05-15 20:57:53 +09003513static void ata_dev_xfermask(struct ata_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003514{
Tejun Heo3373efd2006-05-15 20:57:53 +09003515 struct ata_port *ap = dev->ap;
Jeff Garzikcca39742006-08-24 03:19:22 -04003516 struct ata_host *host = ap->host;
Tejun Heoa6d5a512006-03-06 04:31:57 +09003517 unsigned long xfer_mask;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003518
Tejun Heo37deecb2006-08-10 16:59:07 +09003519 /* controller modes available */
Tejun Heo565083e2006-04-02 17:54:47 +09003520 xfer_mask = ata_pack_xfermask(ap->pio_mask,
3521 ap->mwdma_mask, ap->udma_mask);
3522
Robert Hancock8343f882007-03-06 02:37:51 -08003523 /* drive modes available */
Tejun Heo37deecb2006-08-10 16:59:07 +09003524 xfer_mask &= ata_pack_xfermask(dev->pio_mask,
3525 dev->mwdma_mask, dev->udma_mask);
3526 xfer_mask &= ata_id_xfermask(dev->id);
Tejun Heo565083e2006-04-02 17:54:47 +09003527
Alan Coxb352e572006-08-10 18:52:12 +01003528 /*
3529 * CFA Advanced TrueIDE timings are not allowed on a shared
3530 * cable
3531 */
3532 if (ata_dev_pair(dev)) {
3533 /* No PIO5 or PIO6 */
3534 xfer_mask &= ~(0x03 << (ATA_SHIFT_PIO + 5));
3535 /* No MWDMA3 or MWDMA 4 */
3536 xfer_mask &= ~(0x03 << (ATA_SHIFT_MWDMA + 3));
3537 }
3538
Tejun Heo37deecb2006-08-10 16:59:07 +09003539 if (ata_dma_blacklisted(dev)) {
3540 xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA);
Tejun Heof15a1da2006-05-15 20:57:56 +09003541 ata_dev_printk(dev, KERN_WARNING,
3542 "device is on DMA blacklist, disabling DMA\n");
Tejun Heo37deecb2006-08-10 16:59:07 +09003543 }
Tejun Heoa6d5a512006-03-06 04:31:57 +09003544
Petr Vandrovec14d66ab2007-03-08 10:12:12 +01003545 if ((host->flags & ATA_HOST_SIMPLEX) &&
3546 host->simplex_claimed && host->simplex_claimed != ap) {
Tejun Heo37deecb2006-08-10 16:59:07 +09003547 xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA);
3548 ata_dev_printk(dev, KERN_WARNING, "simplex DMA is claimed by "
3549 "other device, disabling DMA\n");
Alan Cox5444a6f2006-03-27 18:58:20 +01003550 }
Tejun Heo565083e2006-04-02 17:54:47 +09003551
Jeff Garzike4246752007-03-09 09:56:46 -05003552 if (ap->flags & ATA_FLAG_NO_IORDY)
3553 xfer_mask &= ata_pio_mask_no_iordy(dev);
3554
Alan Cox5444a6f2006-03-27 18:58:20 +01003555 if (ap->ops->mode_filter)
Alan Coxa76b62c2007-03-09 09:34:07 -05003556 xfer_mask = ap->ops->mode_filter(dev, xfer_mask);
Alan Cox5444a6f2006-03-27 18:58:20 +01003557
Robert Hancock8343f882007-03-06 02:37:51 -08003558 /* Apply cable rule here. Don't apply it early because when
3559 * we handle hot plug the cable type can itself change.
3560 * Check this last so that we know if the transfer rate was
3561 * solely limited by the cable.
3562 * Unknown or 80 wire cables reported host side are checked
3563 * drive side as well. Cases where we know a 40wire cable
3564 * is used safely for 80 are not checked here.
3565 */
3566 if (xfer_mask & (0xF8 << ATA_SHIFT_UDMA))
3567 /* UDMA/44 or higher would be available */
3568 if((ap->cbl == ATA_CBL_PATA40) ||
3569 (ata_drive_40wire(dev->id) &&
3570 (ap->cbl == ATA_CBL_PATA_UNK ||
3571 ap->cbl == ATA_CBL_PATA80))) {
3572 ata_dev_printk(dev, KERN_WARNING,
3573 "limited to UDMA/33 due to 40-wire cable\n");
3574 xfer_mask &= ~(0xF8 << ATA_SHIFT_UDMA);
3575 }
3576
Tejun Heo565083e2006-04-02 17:54:47 +09003577 ata_unpack_xfermask(xfer_mask, &dev->pio_mask,
3578 &dev->mwdma_mask, &dev->udma_mask);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003579}
3580
Linus Torvalds1da177e2005-04-16 15:20:36 -07003581/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07003582 * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command
Linus Torvalds1da177e2005-04-16 15:20:36 -07003583 * @dev: Device to which command will be sent
3584 *
Jeff Garzik780a87f2005-05-30 15:41:05 -04003585 * Issue SET FEATURES - XFER MODE command to device @dev
3586 * on port @ap.
3587 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07003588 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04003589 * PCI/etc. bus probe sem.
Tejun Heo83206a22006-03-24 15:25:31 +09003590 *
3591 * RETURNS:
3592 * 0 on success, AC_ERR_* mask otherwise.
Linus Torvalds1da177e2005-04-16 15:20:36 -07003593 */
3594
Tejun Heo3373efd2006-05-15 20:57:53 +09003595static unsigned int ata_dev_set_xfermode(struct ata_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003596{
Tejun Heoa0123702005-12-13 14:49:31 +09003597 struct ata_taskfile tf;
Tejun Heo83206a22006-03-24 15:25:31 +09003598 unsigned int err_mask;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003599
3600 /* set up set-features taskfile */
3601 DPRINTK("set features - xfer mode\n");
3602
Tejun Heo3373efd2006-05-15 20:57:53 +09003603 ata_tf_init(dev, &tf);
Tejun Heoa0123702005-12-13 14:49:31 +09003604 tf.command = ATA_CMD_SET_FEATURES;
3605 tf.feature = SETFEATURES_XFER;
3606 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
3607 tf.protocol = ATA_PROT_NODATA;
3608 tf.nsect = dev->xfer_mode;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003609
Tejun Heo3373efd2006-05-15 20:57:53 +09003610 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003611
Tejun Heo83206a22006-03-24 15:25:31 +09003612 DPRINTK("EXIT, err_mask=%x\n", err_mask);
3613 return err_mask;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003614}
3615
3616/**
Albert Lee8bf62ec2005-05-12 15:29:42 -04003617 * ata_dev_init_params - Issue INIT DEV PARAMS command
Albert Lee8bf62ec2005-05-12 15:29:42 -04003618 * @dev: Device to which command will be sent
Randy Dunlape2a7f772006-05-18 10:50:18 -07003619 * @heads: Number of heads (taskfile parameter)
3620 * @sectors: Number of sectors (taskfile parameter)
Albert Lee8bf62ec2005-05-12 15:29:42 -04003621 *
3622 * LOCKING:
Tejun Heo6aff8f12006-02-15 18:24:09 +09003623 * Kernel thread context (may sleep)
3624 *
3625 * RETURNS:
3626 * 0 on success, AC_ERR_* mask otherwise.
Albert Lee8bf62ec2005-05-12 15:29:42 -04003627 */
Tejun Heo3373efd2006-05-15 20:57:53 +09003628static unsigned int ata_dev_init_params(struct ata_device *dev,
3629 u16 heads, u16 sectors)
Albert Lee8bf62ec2005-05-12 15:29:42 -04003630{
Tejun Heoa0123702005-12-13 14:49:31 +09003631 struct ata_taskfile tf;
Tejun Heo6aff8f12006-02-15 18:24:09 +09003632 unsigned int err_mask;
Albert Lee8bf62ec2005-05-12 15:29:42 -04003633
3634 /* Number of sectors per track 1-255. Number of heads 1-16 */
3635 if (sectors < 1 || sectors > 255 || heads < 1 || heads > 16)
Albert Lee00b6f5e2006-03-27 16:39:18 +08003636 return AC_ERR_INVALID;
Albert Lee8bf62ec2005-05-12 15:29:42 -04003637
3638 /* set up init dev params taskfile */
3639 DPRINTK("init dev params \n");
3640
Tejun Heo3373efd2006-05-15 20:57:53 +09003641 ata_tf_init(dev, &tf);
Tejun Heoa0123702005-12-13 14:49:31 +09003642 tf.command = ATA_CMD_INIT_DEV_PARAMS;
3643 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
3644 tf.protocol = ATA_PROT_NODATA;
3645 tf.nsect = sectors;
3646 tf.device |= (heads - 1) & 0x0f; /* max head = num. of heads - 1 */
Albert Lee8bf62ec2005-05-12 15:29:42 -04003647
Tejun Heo3373efd2006-05-15 20:57:53 +09003648 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0);
Albert Lee8bf62ec2005-05-12 15:29:42 -04003649
Tejun Heo6aff8f12006-02-15 18:24:09 +09003650 DPRINTK("EXIT, err_mask=%x\n", err_mask);
3651 return err_mask;
Albert Lee8bf62ec2005-05-12 15:29:42 -04003652}
3653
3654/**
Jeff Garzik0cba6322005-05-30 19:49:12 -04003655 * ata_sg_clean - Unmap DMA memory associated with command
3656 * @qc: Command containing DMA memory to be released
3657 *
3658 * Unmap all mapped DMA memory associated with this command.
Linus Torvalds1da177e2005-04-16 15:20:36 -07003659 *
3660 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04003661 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003662 */
Tejun Heo70e6ad02006-11-14 22:47:10 +09003663void ata_sg_clean(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003664{
3665 struct ata_port *ap = qc->ap;
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003666 struct scatterlist *sg = qc->__sg;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003667 int dir = qc->dma_dir;
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003668 void *pad_buf = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003669
Tejun Heoa4631472006-02-11 19:11:13 +09003670 WARN_ON(!(qc->flags & ATA_QCFLAG_DMAMAP));
3671 WARN_ON(sg == NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003672
3673 if (qc->flags & ATA_QCFLAG_SINGLE)
Jeff Garzikf1318832006-02-20 16:55:56 -05003674 WARN_ON(qc->n_elem > 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003675
Jeff Garzik2c13b7c2005-11-14 14:14:16 -05003676 VPRINTK("unmapping %u sg elements\n", qc->n_elem);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003677
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003678 /* if we padded the buffer out to 32-bit bound, and data
3679 * xfer direction is from-device, we must copy from the
3680 * pad buffer back into the supplied buffer
3681 */
3682 if (qc->pad_len && !(qc->tf.flags & ATA_TFLAG_WRITE))
3683 pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ);
3684
3685 if (qc->flags & ATA_QCFLAG_SG) {
Jeff Garzike1410f22005-11-14 14:06:26 -05003686 if (qc->n_elem)
Brian King2f1f6102006-03-23 17:30:15 -06003687 dma_unmap_sg(ap->dev, sg, qc->n_elem, dir);
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003688 /* restore last sg */
3689 sg[qc->orig_n_elem - 1].length += qc->pad_len;
3690 if (pad_buf) {
3691 struct scatterlist *psg = &qc->pad_sgent;
3692 void *addr = kmap_atomic(psg->page, KM_IRQ0);
3693 memcpy(addr + psg->offset, pad_buf, qc->pad_len);
Mark Lorddfa15982005-12-12 23:19:28 -05003694 kunmap_atomic(addr, KM_IRQ0);
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003695 }
3696 } else {
Tejun Heo2e242fa2006-02-20 23:48:38 +09003697 if (qc->n_elem)
Brian King2f1f6102006-03-23 17:30:15 -06003698 dma_unmap_single(ap->dev,
Jeff Garzike1410f22005-11-14 14:06:26 -05003699 sg_dma_address(&sg[0]), sg_dma_len(&sg[0]),
3700 dir);
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003701 /* restore sg */
3702 sg->length += qc->pad_len;
3703 if (pad_buf)
3704 memcpy(qc->buf_virt + sg->length - qc->pad_len,
3705 pad_buf, qc->pad_len);
3706 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003707
3708 qc->flags &= ~ATA_QCFLAG_DMAMAP;
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003709 qc->__sg = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003710}
3711
3712/**
3713 * ata_fill_sg - Fill PCI IDE PRD table
3714 * @qc: Metadata associated with taskfile to be transferred
3715 *
Jeff Garzik780a87f2005-05-30 15:41:05 -04003716 * Fill PCI IDE PRD (scatter-gather) table with segments
3717 * associated with the current disk command.
3718 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07003719 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04003720 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003721 *
3722 */
3723static void ata_fill_sg(struct ata_queued_cmd *qc)
3724{
Linus Torvalds1da177e2005-04-16 15:20:36 -07003725 struct ata_port *ap = qc->ap;
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003726 struct scatterlist *sg;
3727 unsigned int idx;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003728
Tejun Heoa4631472006-02-11 19:11:13 +09003729 WARN_ON(qc->__sg == NULL);
Jeff Garzikf1318832006-02-20 16:55:56 -05003730 WARN_ON(qc->n_elem == 0 && qc->pad_len == 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003731
3732 idx = 0;
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003733 ata_for_each_sg(sg, qc) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003734 u32 addr, offset;
3735 u32 sg_len, len;
3736
3737 /* determine if physical DMA addr spans 64K boundary.
3738 * Note h/w doesn't support 64-bit, so we unconditionally
3739 * truncate dma_addr_t to u32.
3740 */
3741 addr = (u32) sg_dma_address(sg);
3742 sg_len = sg_dma_len(sg);
3743
3744 while (sg_len) {
3745 offset = addr & 0xffff;
3746 len = sg_len;
3747 if ((offset + sg_len) > 0x10000)
3748 len = 0x10000 - offset;
3749
3750 ap->prd[idx].addr = cpu_to_le32(addr);
3751 ap->prd[idx].flags_len = cpu_to_le32(len & 0xffff);
3752 VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", idx, addr, len);
3753
3754 idx++;
3755 sg_len -= len;
3756 addr += len;
3757 }
3758 }
3759
3760 if (idx)
3761 ap->prd[idx - 1].flags_len |= cpu_to_le32(ATA_PRD_EOT);
3762}
3763/**
3764 * ata_check_atapi_dma - Check whether ATAPI DMA can be supported
3765 * @qc: Metadata associated with taskfile to check
3766 *
Jeff Garzik780a87f2005-05-30 15:41:05 -04003767 * Allow low-level driver to filter ATA PACKET commands, returning
3768 * a status indicating whether or not it is OK to use DMA for the
3769 * supplied PACKET command.
3770 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07003771 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04003772 * spin_lock_irqsave(host lock)
Jeff Garzik0cba6322005-05-30 19:49:12 -04003773 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07003774 * RETURNS: 0 when ATAPI DMA can be used
3775 * nonzero otherwise
3776 */
3777int ata_check_atapi_dma(struct ata_queued_cmd *qc)
3778{
3779 struct ata_port *ap = qc->ap;
3780 int rc = 0; /* Assume ATAPI DMA is OK by default */
3781
Albert Lee6f23a312007-04-02 11:39:25 +08003782 /* some drives can only do ATAPI DMA on read/write */
3783 if (unlikely(qc->dev->horkage & ATA_HORKAGE_DMA_RW_ONLY)) {
3784 struct scsi_cmnd *cmd = qc->scsicmd;
3785 u8 *scsicmd = cmd->cmnd;
3786
3787 switch (scsicmd[0]) {
3788 case READ_10:
3789 case WRITE_10:
3790 case READ_12:
3791 case WRITE_12:
3792 case READ_6:
3793 case WRITE_6:
3794 /* atapi dma maybe ok */
3795 break;
3796 default:
3797 /* turn off atapi dma */
3798 return 1;
3799 }
3800 }
3801
Linus Torvalds1da177e2005-04-16 15:20:36 -07003802 if (ap->ops->check_atapi_dma)
3803 rc = ap->ops->check_atapi_dma(qc);
3804
3805 return rc;
3806}
3807/**
3808 * ata_qc_prep - Prepare taskfile for submission
3809 * @qc: Metadata associated with taskfile to be prepared
3810 *
Jeff Garzik780a87f2005-05-30 15:41:05 -04003811 * Prepare ATA taskfile for submission.
3812 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07003813 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04003814 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003815 */
3816void ata_qc_prep(struct ata_queued_cmd *qc)
3817{
3818 if (!(qc->flags & ATA_QCFLAG_DMAMAP))
3819 return;
3820
3821 ata_fill_sg(qc);
3822}
3823
Brian Kinge46834c2006-03-17 17:04:03 -06003824void ata_noop_qc_prep(struct ata_queued_cmd *qc) { }
3825
Jeff Garzik0cba6322005-05-30 19:49:12 -04003826/**
3827 * ata_sg_init_one - Associate command with memory buffer
3828 * @qc: Command to be associated
3829 * @buf: Memory buffer
3830 * @buflen: Length of memory buffer, in bytes.
3831 *
3832 * Initialize the data-related elements of queued_cmd @qc
3833 * to point to a single memory buffer, @buf of byte length @buflen.
3834 *
3835 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04003836 * spin_lock_irqsave(host lock)
Jeff Garzik0cba6322005-05-30 19:49:12 -04003837 */
3838
Linus Torvalds1da177e2005-04-16 15:20:36 -07003839void ata_sg_init_one(struct ata_queued_cmd *qc, void *buf, unsigned int buflen)
3840{
Linus Torvalds1da177e2005-04-16 15:20:36 -07003841 qc->flags |= ATA_QCFLAG_SINGLE;
3842
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003843 qc->__sg = &qc->sgent;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003844 qc->n_elem = 1;
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003845 qc->orig_n_elem = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003846 qc->buf_virt = buf;
Brian King233277c2006-06-07 11:25:31 -05003847 qc->nbytes = buflen;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003848
Tejun Heo61c05962006-11-14 22:35:43 +09003849 sg_init_one(&qc->sgent, buf, buflen);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003850}
3851
Jeff Garzik0cba6322005-05-30 19:49:12 -04003852/**
3853 * ata_sg_init - Associate command with scatter-gather table.
3854 * @qc: Command to be associated
3855 * @sg: Scatter-gather table.
3856 * @n_elem: Number of elements in s/g table.
3857 *
3858 * Initialize the data-related elements of queued_cmd @qc
3859 * to point to a scatter-gather table @sg, containing @n_elem
3860 * elements.
3861 *
3862 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04003863 * spin_lock_irqsave(host lock)
Jeff Garzik0cba6322005-05-30 19:49:12 -04003864 */
3865
Linus Torvalds1da177e2005-04-16 15:20:36 -07003866void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
3867 unsigned int n_elem)
3868{
3869 qc->flags |= ATA_QCFLAG_SG;
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003870 qc->__sg = sg;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003871 qc->n_elem = n_elem;
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003872 qc->orig_n_elem = n_elem;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003873}
3874
3875/**
Jeff Garzik0cba6322005-05-30 19:49:12 -04003876 * ata_sg_setup_one - DMA-map the memory buffer associated with a command.
3877 * @qc: Command with memory buffer to be mapped.
3878 *
3879 * DMA-map the memory buffer associated with queued_cmd @qc.
Linus Torvalds1da177e2005-04-16 15:20:36 -07003880 *
3881 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04003882 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003883 *
3884 * RETURNS:
Jeff Garzik0cba6322005-05-30 19:49:12 -04003885 * Zero on success, negative on error.
Linus Torvalds1da177e2005-04-16 15:20:36 -07003886 */
3887
3888static int ata_sg_setup_one(struct ata_queued_cmd *qc)
3889{
3890 struct ata_port *ap = qc->ap;
3891 int dir = qc->dma_dir;
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003892 struct scatterlist *sg = qc->__sg;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003893 dma_addr_t dma_address;
Tejun Heo2e242fa2006-02-20 23:48:38 +09003894 int trim_sg = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003895
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003896 /* we must lengthen transfers to end on a 32-bit boundary */
3897 qc->pad_len = sg->length & 3;
3898 if (qc->pad_len) {
3899 void *pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ);
3900 struct scatterlist *psg = &qc->pad_sgent;
3901
Tejun Heoa4631472006-02-11 19:11:13 +09003902 WARN_ON(qc->dev->class != ATA_DEV_ATAPI);
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003903
3904 memset(pad_buf, 0, ATA_DMA_PAD_SZ);
3905
3906 if (qc->tf.flags & ATA_TFLAG_WRITE)
3907 memcpy(pad_buf, qc->buf_virt + sg->length - qc->pad_len,
3908 qc->pad_len);
3909
3910 sg_dma_address(psg) = ap->pad_dma + (qc->tag * ATA_DMA_PAD_SZ);
3911 sg_dma_len(psg) = ATA_DMA_PAD_SZ;
3912 /* trim sg */
3913 sg->length -= qc->pad_len;
Tejun Heo2e242fa2006-02-20 23:48:38 +09003914 if (sg->length == 0)
3915 trim_sg = 1;
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003916
3917 DPRINTK("padding done, sg->length=%u pad_len=%u\n",
3918 sg->length, qc->pad_len);
3919 }
3920
Tejun Heo2e242fa2006-02-20 23:48:38 +09003921 if (trim_sg) {
3922 qc->n_elem--;
Jeff Garzike1410f22005-11-14 14:06:26 -05003923 goto skip_map;
3924 }
3925
Brian King2f1f6102006-03-23 17:30:15 -06003926 dma_address = dma_map_single(ap->dev, qc->buf_virt,
Albert Lee32529e02005-05-26 03:49:42 -04003927 sg->length, dir);
Tejun Heo537a95d2005-11-05 14:29:01 -05003928 if (dma_mapping_error(dma_address)) {
3929 /* restore sg */
3930 sg->length += qc->pad_len;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003931 return -1;
Tejun Heo537a95d2005-11-05 14:29:01 -05003932 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003933
3934 sg_dma_address(sg) = dma_address;
Albert Lee32529e02005-05-26 03:49:42 -04003935 sg_dma_len(sg) = sg->length;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003936
Tejun Heo2e242fa2006-02-20 23:48:38 +09003937skip_map:
Linus Torvalds1da177e2005-04-16 15:20:36 -07003938 DPRINTK("mapped buffer of %d bytes for %s\n", sg_dma_len(sg),
3939 qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read");
3940
3941 return 0;
3942}
3943
3944/**
Jeff Garzik0cba6322005-05-30 19:49:12 -04003945 * ata_sg_setup - DMA-map the scatter-gather table associated with a command.
3946 * @qc: Command with scatter-gather table to be mapped.
3947 *
3948 * DMA-map the scatter-gather table associated with queued_cmd @qc.
Linus Torvalds1da177e2005-04-16 15:20:36 -07003949 *
3950 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04003951 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003952 *
3953 * RETURNS:
Jeff Garzik0cba6322005-05-30 19:49:12 -04003954 * Zero on success, negative on error.
Linus Torvalds1da177e2005-04-16 15:20:36 -07003955 *
3956 */
3957
3958static int ata_sg_setup(struct ata_queued_cmd *qc)
3959{
3960 struct ata_port *ap = qc->ap;
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003961 struct scatterlist *sg = qc->__sg;
3962 struct scatterlist *lsg = &sg[qc->n_elem - 1];
Jeff Garzike1410f22005-11-14 14:06:26 -05003963 int n_elem, pre_n_elem, dir, trim_sg = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003964
Tejun Heo44877b42007-02-21 01:06:51 +09003965 VPRINTK("ENTER, ata%u\n", ap->print_id);
Tejun Heoa4631472006-02-11 19:11:13 +09003966 WARN_ON(!(qc->flags & ATA_QCFLAG_SG));
Linus Torvalds1da177e2005-04-16 15:20:36 -07003967
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003968 /* we must lengthen transfers to end on a 32-bit boundary */
3969 qc->pad_len = lsg->length & 3;
3970 if (qc->pad_len) {
3971 void *pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ);
3972 struct scatterlist *psg = &qc->pad_sgent;
3973 unsigned int offset;
3974
Tejun Heoa4631472006-02-11 19:11:13 +09003975 WARN_ON(qc->dev->class != ATA_DEV_ATAPI);
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003976
3977 memset(pad_buf, 0, ATA_DMA_PAD_SZ);
3978
3979 /*
3980 * psg->page/offset are used to copy to-be-written
3981 * data in this function or read data in ata_sg_clean.
3982 */
3983 offset = lsg->offset + lsg->length - qc->pad_len;
3984 psg->page = nth_page(lsg->page, offset >> PAGE_SHIFT);
3985 psg->offset = offset_in_page(offset);
3986
3987 if (qc->tf.flags & ATA_TFLAG_WRITE) {
3988 void *addr = kmap_atomic(psg->page, KM_IRQ0);
3989 memcpy(pad_buf, addr + psg->offset, qc->pad_len);
Mark Lorddfa15982005-12-12 23:19:28 -05003990 kunmap_atomic(addr, KM_IRQ0);
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003991 }
3992
3993 sg_dma_address(psg) = ap->pad_dma + (qc->tag * ATA_DMA_PAD_SZ);
3994 sg_dma_len(psg) = ATA_DMA_PAD_SZ;
3995 /* trim last sg */
3996 lsg->length -= qc->pad_len;
Jeff Garzike1410f22005-11-14 14:06:26 -05003997 if (lsg->length == 0)
3998 trim_sg = 1;
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003999
4000 DPRINTK("padding done, sg[%d].length=%u pad_len=%u\n",
4001 qc->n_elem - 1, lsg->length, qc->pad_len);
4002 }
4003
Jeff Garzike1410f22005-11-14 14:06:26 -05004004 pre_n_elem = qc->n_elem;
4005 if (trim_sg && pre_n_elem)
4006 pre_n_elem--;
4007
4008 if (!pre_n_elem) {
4009 n_elem = 0;
4010 goto skip_map;
4011 }
4012
Linus Torvalds1da177e2005-04-16 15:20:36 -07004013 dir = qc->dma_dir;
Brian King2f1f6102006-03-23 17:30:15 -06004014 n_elem = dma_map_sg(ap->dev, sg, pre_n_elem, dir);
Tejun Heo537a95d2005-11-05 14:29:01 -05004015 if (n_elem < 1) {
4016 /* restore last sg */
4017 lsg->length += qc->pad_len;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004018 return -1;
Tejun Heo537a95d2005-11-05 14:29:01 -05004019 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07004020
4021 DPRINTK("%d sg elements mapped\n", n_elem);
4022
Jeff Garzike1410f22005-11-14 14:06:26 -05004023skip_map:
Linus Torvalds1da177e2005-04-16 15:20:36 -07004024 qc->n_elem = n_elem;
4025
4026 return 0;
4027}
4028
4029/**
Randy Dunlapc893a3a2006-01-28 13:15:32 -05004030 * swap_buf_le16 - swap halves of 16-bit words in place
Edward Falk0baab862005-06-02 18:17:13 -04004031 * @buf: Buffer to swap
4032 * @buf_words: Number of 16-bit words in buffer.
4033 *
4034 * Swap halves of 16-bit words if needed to convert from
4035 * little-endian byte order to native cpu byte order, or
4036 * vice-versa.
4037 *
4038 * LOCKING:
Randy Dunlap6f0ef4f2005-10-25 01:44:30 -04004039 * Inherited from caller.
Edward Falk0baab862005-06-02 18:17:13 -04004040 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07004041void swap_buf_le16(u16 *buf, unsigned int buf_words)
4042{
4043#ifdef __BIG_ENDIAN
4044 unsigned int i;
4045
4046 for (i = 0; i < buf_words; i++)
4047 buf[i] = le16_to_cpu(buf[i]);
4048#endif /* __BIG_ENDIAN */
4049}
4050
Albert Lee6ae4cfb2005-08-12 14:15:34 +08004051/**
Tejun Heo0d5ff562007-02-01 15:06:36 +09004052 * ata_data_xfer - Transfer data by PIO
Alan Coxa6b2c5d2006-05-22 16:59:59 +01004053 * @adev: device to target
Albert Lee6ae4cfb2005-08-12 14:15:34 +08004054 * @buf: data buffer
4055 * @buflen: buffer length
Jeff Garzik344baba2005-09-07 01:15:17 -04004056 * @write_data: read/write
Albert Lee6ae4cfb2005-08-12 14:15:34 +08004057 *
4058 * Transfer data from/to the device data register by PIO.
4059 *
4060 * LOCKING:
4061 * Inherited from caller.
Albert Lee6ae4cfb2005-08-12 14:15:34 +08004062 */
Tejun Heo0d5ff562007-02-01 15:06:36 +09004063void ata_data_xfer(struct ata_device *adev, unsigned char *buf,
4064 unsigned int buflen, int write_data)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004065{
Alan Coxa6b2c5d2006-05-22 16:59:59 +01004066 struct ata_port *ap = adev->ap;
Albert Lee6ae4cfb2005-08-12 14:15:34 +08004067 unsigned int words = buflen >> 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004068
Albert Lee6ae4cfb2005-08-12 14:15:34 +08004069 /* Transfer multiple of 2 bytes */
Linus Torvalds1da177e2005-04-16 15:20:36 -07004070 if (write_data)
Tejun Heo0d5ff562007-02-01 15:06:36 +09004071 iowrite16_rep(ap->ioaddr.data_addr, buf, words);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004072 else
Tejun Heo0d5ff562007-02-01 15:06:36 +09004073 ioread16_rep(ap->ioaddr.data_addr, buf, words);
Albert Lee6ae4cfb2005-08-12 14:15:34 +08004074
4075 /* Transfer trailing 1 byte, if any. */
4076 if (unlikely(buflen & 0x01)) {
4077 u16 align_buf[1] = { 0 };
4078 unsigned char *trailing_buf = buf + buflen - 1;
4079
4080 if (write_data) {
4081 memcpy(align_buf, trailing_buf, 1);
Tejun Heo0d5ff562007-02-01 15:06:36 +09004082 iowrite16(le16_to_cpu(align_buf[0]), ap->ioaddr.data_addr);
Albert Lee6ae4cfb2005-08-12 14:15:34 +08004083 } else {
Tejun Heo0d5ff562007-02-01 15:06:36 +09004084 align_buf[0] = cpu_to_le16(ioread16(ap->ioaddr.data_addr));
Albert Lee6ae4cfb2005-08-12 14:15:34 +08004085 memcpy(trailing_buf, align_buf, 1);
4086 }
4087 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07004088}
4089
Albert Lee6ae4cfb2005-08-12 14:15:34 +08004090/**
Tejun Heo0d5ff562007-02-01 15:06:36 +09004091 * ata_data_xfer_noirq - Transfer data by PIO
Alan Cox75e99582006-05-24 14:14:41 +01004092 * @adev: device to target
4093 * @buf: data buffer
4094 * @buflen: buffer length
4095 * @write_data: read/write
4096 *
Tejun Heo88574552006-06-25 20:00:35 +09004097 * Transfer data from/to the device data register by PIO. Do the
Alan Cox75e99582006-05-24 14:14:41 +01004098 * transfer with interrupts disabled.
4099 *
4100 * LOCKING:
4101 * Inherited from caller.
4102 */
Tejun Heo0d5ff562007-02-01 15:06:36 +09004103void ata_data_xfer_noirq(struct ata_device *adev, unsigned char *buf,
4104 unsigned int buflen, int write_data)
Alan Cox75e99582006-05-24 14:14:41 +01004105{
4106 unsigned long flags;
4107 local_irq_save(flags);
Tejun Heo0d5ff562007-02-01 15:06:36 +09004108 ata_data_xfer(adev, buf, buflen, write_data);
Alan Cox75e99582006-05-24 14:14:41 +01004109 local_irq_restore(flags);
4110}
4111
4112
4113/**
Mark Lord5a5dbd12007-03-16 10:22:26 -04004114 * ata_pio_sector - Transfer a sector of data.
Albert Lee6ae4cfb2005-08-12 14:15:34 +08004115 * @qc: Command on going
4116 *
Mark Lord5a5dbd12007-03-16 10:22:26 -04004117 * Transfer qc->sect_size bytes of data from/to the ATA device.
Albert Lee6ae4cfb2005-08-12 14:15:34 +08004118 *
4119 * LOCKING:
4120 * Inherited from caller.
4121 */
4122
Linus Torvalds1da177e2005-04-16 15:20:36 -07004123static void ata_pio_sector(struct ata_queued_cmd *qc)
4124{
4125 int do_write = (qc->tf.flags & ATA_TFLAG_WRITE);
Jeff Garzikcedc9a42005-10-05 07:13:30 -04004126 struct scatterlist *sg = qc->__sg;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004127 struct ata_port *ap = qc->ap;
4128 struct page *page;
4129 unsigned int offset;
4130 unsigned char *buf;
4131
Mark Lord5a5dbd12007-03-16 10:22:26 -04004132 if (qc->curbytes == qc->nbytes - qc->sect_size)
Albert Lee14be71f2005-09-27 17:36:35 +08004133 ap->hsm_task_state = HSM_ST_LAST;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004134
4135 page = sg[qc->cursg].page;
Tejun Heo726f0782007-01-03 17:30:39 +09004136 offset = sg[qc->cursg].offset + qc->cursg_ofs;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004137
4138 /* get the current page and offset */
4139 page = nth_page(page, (offset >> PAGE_SHIFT));
4140 offset %= PAGE_SIZE;
4141
Albert Lee7282aa42005-10-09 09:46:07 -04004142 DPRINTK("data %s\n", qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read");
4143
Albert Lee91b8b312005-10-09 09:48:44 -04004144 if (PageHighMem(page)) {
4145 unsigned long flags;
Albert Lee7282aa42005-10-09 09:46:07 -04004146
Alan Coxa6b2c5d2006-05-22 16:59:59 +01004147 /* FIXME: use a bounce buffer */
Albert Lee91b8b312005-10-09 09:48:44 -04004148 local_irq_save(flags);
4149 buf = kmap_atomic(page, KM_IRQ0);
Albert Lee083958d2005-10-09 09:47:31 -04004150
Albert Lee91b8b312005-10-09 09:48:44 -04004151 /* do the actual data transfer */
Mark Lord5a5dbd12007-03-16 10:22:26 -04004152 ap->ops->data_xfer(qc->dev, buf + offset, qc->sect_size, do_write);
Albert Lee91b8b312005-10-09 09:48:44 -04004153
4154 kunmap_atomic(buf, KM_IRQ0);
4155 local_irq_restore(flags);
4156 } else {
4157 buf = page_address(page);
Mark Lord5a5dbd12007-03-16 10:22:26 -04004158 ap->ops->data_xfer(qc->dev, buf + offset, qc->sect_size, do_write);
Albert Lee91b8b312005-10-09 09:48:44 -04004159 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07004160
Mark Lord5a5dbd12007-03-16 10:22:26 -04004161 qc->curbytes += qc->sect_size;
4162 qc->cursg_ofs += qc->sect_size;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004163
Tejun Heo726f0782007-01-03 17:30:39 +09004164 if (qc->cursg_ofs == (&sg[qc->cursg])->length) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07004165 qc->cursg++;
4166 qc->cursg_ofs = 0;
4167 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07004168}
Linus Torvalds1da177e2005-04-16 15:20:36 -07004169
Albert Lee6ae4cfb2005-08-12 14:15:34 +08004170/**
Mark Lord5a5dbd12007-03-16 10:22:26 -04004171 * ata_pio_sectors - Transfer one or many sectors.
Albert Lee07f6f7d2005-11-01 19:33:20 +08004172 * @qc: Command on going
4173 *
Mark Lord5a5dbd12007-03-16 10:22:26 -04004174 * Transfer one or many sectors of data from/to the
Albert Lee07f6f7d2005-11-01 19:33:20 +08004175 * ATA device for the DRQ request.
4176 *
4177 * LOCKING:
4178 * Inherited from caller.
4179 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07004180
Albert Lee07f6f7d2005-11-01 19:33:20 +08004181static void ata_pio_sectors(struct ata_queued_cmd *qc)
4182{
4183 if (is_multi_taskfile(&qc->tf)) {
4184 /* READ/WRITE MULTIPLE */
4185 unsigned int nsect;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004186
Jeff Garzik587005d2006-02-11 18:17:32 -05004187 WARN_ON(qc->dev->multi_count == 0);
Albert Lee07f6f7d2005-11-01 19:33:20 +08004188
Mark Lord5a5dbd12007-03-16 10:22:26 -04004189 nsect = min((qc->nbytes - qc->curbytes) / qc->sect_size,
Tejun Heo726f0782007-01-03 17:30:39 +09004190 qc->dev->multi_count);
Albert Lee07f6f7d2005-11-01 19:33:20 +08004191 while (nsect--)
4192 ata_pio_sector(qc);
4193 } else
4194 ata_pio_sector(qc);
4195}
4196
4197/**
Albert Leec71c1852005-10-04 06:03:45 -04004198 * atapi_send_cdb - Write CDB bytes to hardware
4199 * @ap: Port to which ATAPI device is attached.
4200 * @qc: Taskfile currently active
4201 *
4202 * When device has indicated its readiness to accept
4203 * a CDB, this function is called. Send the CDB.
4204 *
4205 * LOCKING:
4206 * caller.
4207 */
4208
4209static void atapi_send_cdb(struct ata_port *ap, struct ata_queued_cmd *qc)
4210{
4211 /* send SCSI cdb */
4212 DPRINTK("send cdb\n");
Jeff Garzikdb024d52006-02-13 00:23:57 -05004213 WARN_ON(qc->dev->cdb_len < 12);
Albert Leec71c1852005-10-04 06:03:45 -04004214
Alan Coxa6b2c5d2006-05-22 16:59:59 +01004215 ap->ops->data_xfer(qc->dev, qc->cdb, qc->dev->cdb_len, 1);
Albert Leec71c1852005-10-04 06:03:45 -04004216 ata_altstatus(ap); /* flush */
4217
4218 switch (qc->tf.protocol) {
4219 case ATA_PROT_ATAPI:
4220 ap->hsm_task_state = HSM_ST;
4221 break;
4222 case ATA_PROT_ATAPI_NODATA:
4223 ap->hsm_task_state = HSM_ST_LAST;
4224 break;
4225 case ATA_PROT_ATAPI_DMA:
4226 ap->hsm_task_state = HSM_ST_LAST;
4227 /* initiate bmdma */
4228 ap->ops->bmdma_start(qc);
4229 break;
4230 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07004231}
4232
Albert Lee6ae4cfb2005-08-12 14:15:34 +08004233/**
4234 * __atapi_pio_bytes - Transfer data from/to the ATAPI device.
4235 * @qc: Command on going
4236 * @bytes: number of bytes
4237 *
4238 * Transfer Transfer data from/to the ATAPI device.
4239 *
4240 * LOCKING:
4241 * Inherited from caller.
4242 *
4243 */
4244
Linus Torvalds1da177e2005-04-16 15:20:36 -07004245static void __atapi_pio_bytes(struct ata_queued_cmd *qc, unsigned int bytes)
4246{
4247 int do_write = (qc->tf.flags & ATA_TFLAG_WRITE);
Jeff Garzikcedc9a42005-10-05 07:13:30 -04004248 struct scatterlist *sg = qc->__sg;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004249 struct ata_port *ap = qc->ap;
4250 struct page *page;
4251 unsigned char *buf;
4252 unsigned int offset, count;
4253
Albert Lee563a6e12005-08-12 14:17:50 +08004254 if (qc->curbytes + bytes >= qc->nbytes)
Albert Lee14be71f2005-09-27 17:36:35 +08004255 ap->hsm_task_state = HSM_ST_LAST;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004256
4257next_sg:
Albert Lee563a6e12005-08-12 14:17:50 +08004258 if (unlikely(qc->cursg >= qc->n_elem)) {
Jeff Garzik7fb6ec22005-09-16 06:01:48 -04004259 /*
Albert Lee563a6e12005-08-12 14:17:50 +08004260 * The end of qc->sg is reached and the device expects
4261 * more data to transfer. In order not to overrun qc->sg
4262 * and fulfill length specified in the byte count register,
4263 * - for read case, discard trailing data from the device
4264 * - for write case, padding zero data to the device
4265 */
4266 u16 pad_buf[1] = { 0 };
4267 unsigned int words = bytes >> 1;
4268 unsigned int i;
4269
4270 if (words) /* warning if bytes > 1 */
Tejun Heof15a1da2006-05-15 20:57:56 +09004271 ata_dev_printk(qc->dev, KERN_WARNING,
4272 "%u bytes trailing data\n", bytes);
Albert Lee563a6e12005-08-12 14:17:50 +08004273
4274 for (i = 0; i < words; i++)
Alan Coxa6b2c5d2006-05-22 16:59:59 +01004275 ap->ops->data_xfer(qc->dev, (unsigned char*)pad_buf, 2, do_write);
Albert Lee563a6e12005-08-12 14:17:50 +08004276
Albert Lee14be71f2005-09-27 17:36:35 +08004277 ap->hsm_task_state = HSM_ST_LAST;
Albert Lee563a6e12005-08-12 14:17:50 +08004278 return;
4279 }
4280
Jeff Garzikcedc9a42005-10-05 07:13:30 -04004281 sg = &qc->__sg[qc->cursg];
Linus Torvalds1da177e2005-04-16 15:20:36 -07004282
Linus Torvalds1da177e2005-04-16 15:20:36 -07004283 page = sg->page;
4284 offset = sg->offset + qc->cursg_ofs;
4285
4286 /* get the current page and offset */
4287 page = nth_page(page, (offset >> PAGE_SHIFT));
4288 offset %= PAGE_SIZE;
4289
Albert Lee6952df02005-06-06 15:56:03 +08004290 /* don't overrun current sg */
Albert Lee32529e02005-05-26 03:49:42 -04004291 count = min(sg->length - qc->cursg_ofs, bytes);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004292
4293 /* don't cross page boundaries */
4294 count = min(count, (unsigned int)PAGE_SIZE - offset);
4295
Albert Lee7282aa42005-10-09 09:46:07 -04004296 DPRINTK("data %s\n", qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read");
4297
Albert Lee91b8b312005-10-09 09:48:44 -04004298 if (PageHighMem(page)) {
4299 unsigned long flags;
Albert Lee7282aa42005-10-09 09:46:07 -04004300
Alan Coxa6b2c5d2006-05-22 16:59:59 +01004301 /* FIXME: use bounce buffer */
Albert Lee91b8b312005-10-09 09:48:44 -04004302 local_irq_save(flags);
4303 buf = kmap_atomic(page, KM_IRQ0);
Albert Lee083958d2005-10-09 09:47:31 -04004304
Albert Lee91b8b312005-10-09 09:48:44 -04004305 /* do the actual data transfer */
Alan Coxa6b2c5d2006-05-22 16:59:59 +01004306 ap->ops->data_xfer(qc->dev, buf + offset, count, do_write);
Albert Lee91b8b312005-10-09 09:48:44 -04004307
4308 kunmap_atomic(buf, KM_IRQ0);
4309 local_irq_restore(flags);
4310 } else {
4311 buf = page_address(page);
Alan Coxa6b2c5d2006-05-22 16:59:59 +01004312 ap->ops->data_xfer(qc->dev, buf + offset, count, do_write);
Albert Lee91b8b312005-10-09 09:48:44 -04004313 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07004314
4315 bytes -= count;
4316 qc->curbytes += count;
4317 qc->cursg_ofs += count;
4318
Albert Lee32529e02005-05-26 03:49:42 -04004319 if (qc->cursg_ofs == sg->length) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07004320 qc->cursg++;
4321 qc->cursg_ofs = 0;
4322 }
4323
Albert Lee563a6e12005-08-12 14:17:50 +08004324 if (bytes)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004325 goto next_sg;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004326}
4327
Albert Lee6ae4cfb2005-08-12 14:15:34 +08004328/**
4329 * atapi_pio_bytes - Transfer data from/to the ATAPI device.
4330 * @qc: Command on going
4331 *
4332 * Transfer Transfer data from/to the ATAPI device.
4333 *
4334 * LOCKING:
4335 * Inherited from caller.
Albert Lee6ae4cfb2005-08-12 14:15:34 +08004336 */
4337
Linus Torvalds1da177e2005-04-16 15:20:36 -07004338static void atapi_pio_bytes(struct ata_queued_cmd *qc)
4339{
4340 struct ata_port *ap = qc->ap;
4341 struct ata_device *dev = qc->dev;
4342 unsigned int ireason, bc_lo, bc_hi, bytes;
4343 int i_write, do_write = (qc->tf.flags & ATA_TFLAG_WRITE) ? 1 : 0;
4344
Albert Leeeec4c3f2006-05-18 17:51:10 +08004345 /* Abuse qc->result_tf for temp storage of intermediate TF
4346 * here to save some kernel stack usage.
4347 * For normal completion, qc->result_tf is not relevant. For
4348 * error, qc->result_tf is later overwritten by ata_qc_complete().
4349 * So, the correctness of qc->result_tf is not affected.
4350 */
4351 ap->ops->tf_read(ap, &qc->result_tf);
4352 ireason = qc->result_tf.nsect;
4353 bc_lo = qc->result_tf.lbam;
4354 bc_hi = qc->result_tf.lbah;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004355 bytes = (bc_hi << 8) | bc_lo;
4356
4357 /* shall be cleared to zero, indicating xfer of data */
4358 if (ireason & (1 << 0))
4359 goto err_out;
4360
4361 /* make sure transfer direction matches expected */
4362 i_write = ((ireason & (1 << 1)) == 0) ? 1 : 0;
4363 if (do_write != i_write)
4364 goto err_out;
4365
Tejun Heo44877b42007-02-21 01:06:51 +09004366 VPRINTK("ata%u: xfering %d bytes\n", ap->print_id, bytes);
Albert Lee312f7da2005-09-27 17:38:03 +08004367
Linus Torvalds1da177e2005-04-16 15:20:36 -07004368 __atapi_pio_bytes(qc, bytes);
4369
4370 return;
4371
4372err_out:
Tejun Heof15a1da2006-05-15 20:57:56 +09004373 ata_dev_printk(dev, KERN_INFO, "ATAPI check failed\n");
Tejun Heo11a56d22006-01-23 13:09:36 +09004374 qc->err_mask |= AC_ERR_HSM;
Albert Lee14be71f2005-09-27 17:36:35 +08004375 ap->hsm_task_state = HSM_ST_ERR;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004376}
4377
4378/**
Albert Leec234fb02006-03-25 17:58:38 +08004379 * ata_hsm_ok_in_wq - Check if the qc can be handled in the workqueue.
4380 * @ap: the target ata_port
4381 * @qc: qc on going
Linus Torvalds1da177e2005-04-16 15:20:36 -07004382 *
Albert Leec234fb02006-03-25 17:58:38 +08004383 * RETURNS:
4384 * 1 if ok in workqueue, 0 otherwise.
Linus Torvalds1da177e2005-04-16 15:20:36 -07004385 */
Albert Leec234fb02006-03-25 17:58:38 +08004386
4387static inline int ata_hsm_ok_in_wq(struct ata_port *ap, struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004388{
Albert Leec234fb02006-03-25 17:58:38 +08004389 if (qc->tf.flags & ATA_TFLAG_POLLING)
4390 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004391
Albert Leec234fb02006-03-25 17:58:38 +08004392 if (ap->hsm_task_state == HSM_ST_FIRST) {
4393 if (qc->tf.protocol == ATA_PROT_PIO &&
4394 (qc->tf.flags & ATA_TFLAG_WRITE))
4395 return 1;
4396
4397 if (is_atapi_taskfile(&qc->tf) &&
4398 !(qc->dev->flags & ATA_DFLAG_CDB_INTR))
4399 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004400 }
4401
Albert Leec234fb02006-03-25 17:58:38 +08004402 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004403}
4404
Albert Leec234fb02006-03-25 17:58:38 +08004405/**
Tejun Heoc17ea202006-05-15 20:59:29 +09004406 * ata_hsm_qc_complete - finish a qc running on standard HSM
4407 * @qc: Command to complete
4408 * @in_wq: 1 if called from workqueue, 0 otherwise
4409 *
4410 * Finish @qc which is running on standard HSM.
4411 *
4412 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04004413 * If @in_wq is zero, spin_lock_irqsave(host lock).
Tejun Heoc17ea202006-05-15 20:59:29 +09004414 * Otherwise, none on entry and grabs host lock.
4415 */
4416static void ata_hsm_qc_complete(struct ata_queued_cmd *qc, int in_wq)
4417{
4418 struct ata_port *ap = qc->ap;
4419 unsigned long flags;
4420
4421 if (ap->ops->error_handler) {
4422 if (in_wq) {
Jeff Garzikba6a1302006-06-22 23:46:10 -04004423 spin_lock_irqsave(ap->lock, flags);
Tejun Heoc17ea202006-05-15 20:59:29 +09004424
Jeff Garzikcca39742006-08-24 03:19:22 -04004425 /* EH might have kicked in while host lock is
4426 * released.
Tejun Heoc17ea202006-05-15 20:59:29 +09004427 */
4428 qc = ata_qc_from_tag(ap, qc->tag);
4429 if (qc) {
4430 if (likely(!(qc->err_mask & AC_ERR_HSM))) {
Akira Iguchi83625002007-01-26 16:27:32 +09004431 ap->ops->irq_on(ap);
Tejun Heoc17ea202006-05-15 20:59:29 +09004432 ata_qc_complete(qc);
4433 } else
4434 ata_port_freeze(ap);
4435 }
4436
Jeff Garzikba6a1302006-06-22 23:46:10 -04004437 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heoc17ea202006-05-15 20:59:29 +09004438 } else {
4439 if (likely(!(qc->err_mask & AC_ERR_HSM)))
4440 ata_qc_complete(qc);
4441 else
4442 ata_port_freeze(ap);
4443 }
4444 } else {
4445 if (in_wq) {
Jeff Garzikba6a1302006-06-22 23:46:10 -04004446 spin_lock_irqsave(ap->lock, flags);
Akira Iguchi83625002007-01-26 16:27:32 +09004447 ap->ops->irq_on(ap);
Tejun Heoc17ea202006-05-15 20:59:29 +09004448 ata_qc_complete(qc);
Jeff Garzikba6a1302006-06-22 23:46:10 -04004449 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heoc17ea202006-05-15 20:59:29 +09004450 } else
4451 ata_qc_complete(qc);
4452 }
Jeff Garzikc81e29b2006-05-24 01:49:12 -04004453
4454 ata_altstatus(ap); /* flush */
Tejun Heoc17ea202006-05-15 20:59:29 +09004455}
4456
4457/**
Albert Leebb5cb292006-03-25 17:48:02 +08004458 * ata_hsm_move - move the HSM to the next state.
4459 * @ap: the target ata_port
4460 * @qc: qc on going
4461 * @status: current device status
4462 * @in_wq: 1 if called from workqueue, 0 otherwise
4463 *
4464 * RETURNS:
4465 * 1 when poll next status needed, 0 otherwise.
4466 */
Tejun Heo9a1004d2006-05-31 18:27:52 +09004467int ata_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc,
4468 u8 status, int in_wq)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004469{
Albert Leebb5cb292006-03-25 17:48:02 +08004470 unsigned long flags = 0;
4471 int poll_next;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004472
Albert Lee6912ccd2006-03-25 17:45:49 +08004473 WARN_ON((qc->flags & ATA_QCFLAG_ACTIVE) == 0);
Albert Lee0565c262006-02-13 18:55:25 +08004474
Albert Leebb5cb292006-03-25 17:48:02 +08004475 /* Make sure ata_qc_issue_prot() does not throw things
4476 * like DMA polling into the workqueue. Notice that
4477 * in_wq is not equivalent to (qc->tf.flags & ATA_TFLAG_POLLING).
Albert Lee1c848982005-12-05 15:40:15 +08004478 */
Albert Leec234fb02006-03-25 17:58:38 +08004479 WARN_ON(in_wq != ata_hsm_ok_in_wq(ap, qc));
Albert Lee1c848982005-12-05 15:40:15 +08004480
Albert Leee2cec772006-03-25 17:43:49 +08004481fsm_start:
Albert Lee999bb6f2006-03-25 18:07:48 +08004482 DPRINTK("ata%u: protocol %d task_state %d (dev_stat 0x%X)\n",
Tejun Heo44877b42007-02-21 01:06:51 +09004483 ap->print_id, qc->tf.protocol, ap->hsm_task_state, status);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004484
Albert Leee2cec772006-03-25 17:43:49 +08004485 switch (ap->hsm_task_state) {
4486 case HSM_ST_FIRST:
Albert Leebb5cb292006-03-25 17:48:02 +08004487 /* Send first data block or PACKET CDB */
4488
4489 /* If polling, we will stay in the work queue after
4490 * sending the data. Otherwise, interrupt handler
4491 * takes over after sending the data.
4492 */
4493 poll_next = (qc->tf.flags & ATA_TFLAG_POLLING);
4494
Albert Leee2cec772006-03-25 17:43:49 +08004495 /* check device status */
Albert Lee3655d1d2006-05-19 11:43:04 +08004496 if (unlikely((status & ATA_DRQ) == 0)) {
4497 /* handle BSY=0, DRQ=0 as error */
4498 if (likely(status & (ATA_ERR | ATA_DF)))
4499 /* device stops HSM for abort/error */
4500 qc->err_mask |= AC_ERR_DEV;
4501 else
4502 /* HSM violation. Let EH handle this */
4503 qc->err_mask |= AC_ERR_HSM;
4504
Albert Leee2cec772006-03-25 17:43:49 +08004505 ap->hsm_task_state = HSM_ST_ERR;
4506 goto fsm_start;
4507 }
4508
Albert Lee71601952006-03-25 18:11:12 +08004509 /* Device should not ask for data transfer (DRQ=1)
4510 * when it finds something wrong.
Albert Leeeee6c322006-04-01 17:38:43 +08004511 * We ignore DRQ here and stop the HSM by
4512 * changing hsm_task_state to HSM_ST_ERR and
4513 * let the EH abort the command or reset the device.
Albert Lee71601952006-03-25 18:11:12 +08004514 */
4515 if (unlikely(status & (ATA_ERR | ATA_DF))) {
Tejun Heo44877b42007-02-21 01:06:51 +09004516 ata_port_printk(ap, KERN_WARNING, "DRQ=1 with device "
4517 "error, dev_stat 0x%X\n", status);
Albert Lee3655d1d2006-05-19 11:43:04 +08004518 qc->err_mask |= AC_ERR_HSM;
Albert Leeeee6c322006-04-01 17:38:43 +08004519 ap->hsm_task_state = HSM_ST_ERR;
4520 goto fsm_start;
Albert Lee71601952006-03-25 18:11:12 +08004521 }
4522
Albert Leebb5cb292006-03-25 17:48:02 +08004523 /* Send the CDB (atapi) or the first data block (ata pio out).
4524 * During the state transition, interrupt handler shouldn't
4525 * be invoked before the data transfer is complete and
4526 * hsm_task_state is changed. Hence, the following locking.
4527 */
4528 if (in_wq)
Jeff Garzikba6a1302006-06-22 23:46:10 -04004529 spin_lock_irqsave(ap->lock, flags);
Albert Leee2cec772006-03-25 17:43:49 +08004530
Albert Leebb5cb292006-03-25 17:48:02 +08004531 if (qc->tf.protocol == ATA_PROT_PIO) {
4532 /* PIO data out protocol.
4533 * send first data block.
4534 */
4535
4536 /* ata_pio_sectors() might change the state
4537 * to HSM_ST_LAST. so, the state is changed here
4538 * before ata_pio_sectors().
4539 */
4540 ap->hsm_task_state = HSM_ST;
4541 ata_pio_sectors(qc);
4542 ata_altstatus(ap); /* flush */
4543 } else
4544 /* send CDB */
4545 atapi_send_cdb(ap, qc);
4546
4547 if (in_wq)
Jeff Garzikba6a1302006-06-22 23:46:10 -04004548 spin_unlock_irqrestore(ap->lock, flags);
Albert Leebb5cb292006-03-25 17:48:02 +08004549
4550 /* if polling, ata_pio_task() handles the rest.
4551 * otherwise, interrupt handler takes over from here.
4552 */
Albert Leee2cec772006-03-25 17:43:49 +08004553 break;
4554
4555 case HSM_ST:
4556 /* complete command or read/write the data register */
4557 if (qc->tf.protocol == ATA_PROT_ATAPI) {
4558 /* ATAPI PIO protocol */
4559 if ((status & ATA_DRQ) == 0) {
Albert Lee3655d1d2006-05-19 11:43:04 +08004560 /* No more data to transfer or device error.
4561 * Device error will be tagged in HSM_ST_LAST.
4562 */
Albert Leee2cec772006-03-25 17:43:49 +08004563 ap->hsm_task_state = HSM_ST_LAST;
4564 goto fsm_start;
4565 }
4566
Albert Lee71601952006-03-25 18:11:12 +08004567 /* Device should not ask for data transfer (DRQ=1)
4568 * when it finds something wrong.
Albert Leeeee6c322006-04-01 17:38:43 +08004569 * We ignore DRQ here and stop the HSM by
4570 * changing hsm_task_state to HSM_ST_ERR and
4571 * let the EH abort the command or reset the device.
Albert Lee71601952006-03-25 18:11:12 +08004572 */
4573 if (unlikely(status & (ATA_ERR | ATA_DF))) {
Tejun Heo44877b42007-02-21 01:06:51 +09004574 ata_port_printk(ap, KERN_WARNING, "DRQ=1 with "
4575 "device error, dev_stat 0x%X\n",
4576 status);
Albert Lee3655d1d2006-05-19 11:43:04 +08004577 qc->err_mask |= AC_ERR_HSM;
Albert Leeeee6c322006-04-01 17:38:43 +08004578 ap->hsm_task_state = HSM_ST_ERR;
4579 goto fsm_start;
Albert Lee71601952006-03-25 18:11:12 +08004580 }
4581
Albert Leee2cec772006-03-25 17:43:49 +08004582 atapi_pio_bytes(qc);
4583
4584 if (unlikely(ap->hsm_task_state == HSM_ST_ERR))
4585 /* bad ireason reported by device */
4586 goto fsm_start;
4587
4588 } else {
4589 /* ATA PIO protocol */
4590 if (unlikely((status & ATA_DRQ) == 0)) {
4591 /* handle BSY=0, DRQ=0 as error */
Albert Lee3655d1d2006-05-19 11:43:04 +08004592 if (likely(status & (ATA_ERR | ATA_DF)))
4593 /* device stops HSM for abort/error */
4594 qc->err_mask |= AC_ERR_DEV;
4595 else
Tejun Heo55a8e2c2006-11-10 18:08:10 +09004596 /* HSM violation. Let EH handle this.
4597 * Phantom devices also trigger this
4598 * condition. Mark hint.
4599 */
4600 qc->err_mask |= AC_ERR_HSM |
4601 AC_ERR_NODEV_HINT;
Albert Lee3655d1d2006-05-19 11:43:04 +08004602
Albert Leee2cec772006-03-25 17:43:49 +08004603 ap->hsm_task_state = HSM_ST_ERR;
4604 goto fsm_start;
4605 }
4606
Albert Leeeee6c322006-04-01 17:38:43 +08004607 /* For PIO reads, some devices may ask for
4608 * data transfer (DRQ=1) alone with ERR=1.
4609 * We respect DRQ here and transfer one
4610 * block of junk data before changing the
4611 * hsm_task_state to HSM_ST_ERR.
4612 *
4613 * For PIO writes, ERR=1 DRQ=1 doesn't make
4614 * sense since the data block has been
4615 * transferred to the device.
Albert Lee71601952006-03-25 18:11:12 +08004616 */
4617 if (unlikely(status & (ATA_ERR | ATA_DF))) {
Albert Lee71601952006-03-25 18:11:12 +08004618 /* data might be corrputed */
4619 qc->err_mask |= AC_ERR_DEV;
Albert Leeeee6c322006-04-01 17:38:43 +08004620
4621 if (!(qc->tf.flags & ATA_TFLAG_WRITE)) {
4622 ata_pio_sectors(qc);
4623 ata_altstatus(ap);
4624 status = ata_wait_idle(ap);
4625 }
4626
Albert Lee3655d1d2006-05-19 11:43:04 +08004627 if (status & (ATA_BUSY | ATA_DRQ))
4628 qc->err_mask |= AC_ERR_HSM;
4629
Albert Leeeee6c322006-04-01 17:38:43 +08004630 /* ata_pio_sectors() might change the
4631 * state to HSM_ST_LAST. so, the state
4632 * is changed after ata_pio_sectors().
4633 */
4634 ap->hsm_task_state = HSM_ST_ERR;
4635 goto fsm_start;
Albert Lee71601952006-03-25 18:11:12 +08004636 }
4637
Albert Leee2cec772006-03-25 17:43:49 +08004638 ata_pio_sectors(qc);
4639
4640 if (ap->hsm_task_state == HSM_ST_LAST &&
4641 (!(qc->tf.flags & ATA_TFLAG_WRITE))) {
4642 /* all data read */
4643 ata_altstatus(ap);
Albert Lee52a32202006-03-25 18:18:15 +08004644 status = ata_wait_idle(ap);
Albert Leee2cec772006-03-25 17:43:49 +08004645 goto fsm_start;
4646 }
4647 }
4648
4649 ata_altstatus(ap); /* flush */
Albert Leebb5cb292006-03-25 17:48:02 +08004650 poll_next = 1;
Albert Leee2cec772006-03-25 17:43:49 +08004651 break;
4652
4653 case HSM_ST_LAST:
Albert Lee6912ccd2006-03-25 17:45:49 +08004654 if (unlikely(!ata_ok(status))) {
4655 qc->err_mask |= __ac_err_mask(status);
Albert Leee2cec772006-03-25 17:43:49 +08004656 ap->hsm_task_state = HSM_ST_ERR;
4657 goto fsm_start;
4658 }
4659
4660 /* no more data to transfer */
Albert Lee4332a772006-04-03 17:43:24 +08004661 DPRINTK("ata%u: dev %u command complete, drv_stat 0x%x\n",
Tejun Heo44877b42007-02-21 01:06:51 +09004662 ap->print_id, qc->dev->devno, status);
Albert Leee2cec772006-03-25 17:43:49 +08004663
Albert Lee6912ccd2006-03-25 17:45:49 +08004664 WARN_ON(qc->err_mask);
4665
Albert Leee2cec772006-03-25 17:43:49 +08004666 ap->hsm_task_state = HSM_ST_IDLE;
4667
4668 /* complete taskfile transaction */
Tejun Heoc17ea202006-05-15 20:59:29 +09004669 ata_hsm_qc_complete(qc, in_wq);
Albert Leebb5cb292006-03-25 17:48:02 +08004670
4671 poll_next = 0;
Albert Leee2cec772006-03-25 17:43:49 +08004672 break;
4673
4674 case HSM_ST_ERR:
Albert Leee2cec772006-03-25 17:43:49 +08004675 /* make sure qc->err_mask is available to
4676 * know what's wrong and recover
4677 */
4678 WARN_ON(qc->err_mask == 0);
4679
4680 ap->hsm_task_state = HSM_ST_IDLE;
Albert Leebb5cb292006-03-25 17:48:02 +08004681
Albert Lee999bb6f2006-03-25 18:07:48 +08004682 /* complete taskfile transaction */
Tejun Heoc17ea202006-05-15 20:59:29 +09004683 ata_hsm_qc_complete(qc, in_wq);
Albert Leebb5cb292006-03-25 17:48:02 +08004684
4685 poll_next = 0;
Albert Leee2cec772006-03-25 17:43:49 +08004686 break;
4687 default:
Albert Leebb5cb292006-03-25 17:48:02 +08004688 poll_next = 0;
Albert Lee6912ccd2006-03-25 17:45:49 +08004689 BUG();
Albert Leee2cec772006-03-25 17:43:49 +08004690 }
4691
Albert Leebb5cb292006-03-25 17:48:02 +08004692 return poll_next;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004693}
4694
David Howells65f27f32006-11-22 14:55:48 +00004695static void ata_pio_task(struct work_struct *work)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004696{
David Howells65f27f32006-11-22 14:55:48 +00004697 struct ata_port *ap =
4698 container_of(work, struct ata_port, port_task.work);
4699 struct ata_queued_cmd *qc = ap->port_task_data;
Albert Leea1af3732006-03-25 17:50:15 +08004700 u8 status;
4701 int poll_next;
Jeff Garzik7fb6ec22005-09-16 06:01:48 -04004702
4703fsm_start:
Albert Leea1af3732006-03-25 17:50:15 +08004704 WARN_ON(ap->hsm_task_state == HSM_ST_IDLE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004705
Albert Leea1af3732006-03-25 17:50:15 +08004706 /*
4707 * This is purely heuristic. This is a fast path.
4708 * Sometimes when we enter, BSY will be cleared in
4709 * a chk-status or two. If not, the drive is probably seeking
4710 * or something. Snooze for a couple msecs, then
4711 * chk-status again. If still busy, queue delayed work.
4712 */
4713 status = ata_busy_wait(ap, ATA_BUSY, 5);
4714 if (status & ATA_BUSY) {
4715 msleep(2);
4716 status = ata_busy_wait(ap, ATA_BUSY, 10);
4717 if (status & ATA_BUSY) {
Albert Lee31ce6da2006-04-03 18:31:44 +08004718 ata_port_queue_task(ap, ata_pio_task, qc, ATA_SHORT_PAUSE);
Albert Leea1af3732006-03-25 17:50:15 +08004719 return;
4720 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07004721 }
4722
Albert Leea1af3732006-03-25 17:50:15 +08004723 /* move the HSM */
4724 poll_next = ata_hsm_move(ap, qc, status, 1);
4725
4726 /* another command or interrupt handler
4727 * may be running at this point.
4728 */
4729 if (poll_next)
Jeff Garzik7fb6ec22005-09-16 06:01:48 -04004730 goto fsm_start;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004731}
4732
Linus Torvalds1da177e2005-04-16 15:20:36 -07004733/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07004734 * ata_qc_new - Request an available ATA command, for queueing
4735 * @ap: Port associated with device @dev
4736 * @dev: Device from whom we request an available command structure
4737 *
4738 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04004739 * None.
Linus Torvalds1da177e2005-04-16 15:20:36 -07004740 */
4741
4742static struct ata_queued_cmd *ata_qc_new(struct ata_port *ap)
4743{
4744 struct ata_queued_cmd *qc = NULL;
4745 unsigned int i;
4746
Tejun Heoe3180492006-05-15 20:58:09 +09004747 /* no command while frozen */
Tejun Heob51e9e52006-06-29 01:29:30 +09004748 if (unlikely(ap->pflags & ATA_PFLAG_FROZEN))
Tejun Heoe3180492006-05-15 20:58:09 +09004749 return NULL;
4750
Tejun Heo2ab7db12006-05-15 20:58:02 +09004751 /* the last tag is reserved for internal command. */
4752 for (i = 0; i < ATA_MAX_QUEUE - 1; i++)
Tejun Heo6cec4a32006-05-15 21:03:41 +09004753 if (!test_and_set_bit(i, &ap->qc_allocated)) {
Tejun Heof69499f2006-05-15 20:58:03 +09004754 qc = __ata_qc_from_tag(ap, i);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004755 break;
4756 }
4757
4758 if (qc)
4759 qc->tag = i;
4760
4761 return qc;
4762}
4763
4764/**
4765 * ata_qc_new_init - Request an available ATA command, and initialize it
Linus Torvalds1da177e2005-04-16 15:20:36 -07004766 * @dev: Device from whom we request an available command structure
4767 *
4768 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04004769 * None.
Linus Torvalds1da177e2005-04-16 15:20:36 -07004770 */
4771
Tejun Heo3373efd2006-05-15 20:57:53 +09004772struct ata_queued_cmd *ata_qc_new_init(struct ata_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004773{
Tejun Heo3373efd2006-05-15 20:57:53 +09004774 struct ata_port *ap = dev->ap;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004775 struct ata_queued_cmd *qc;
4776
4777 qc = ata_qc_new(ap);
4778 if (qc) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07004779 qc->scsicmd = NULL;
4780 qc->ap = ap;
4781 qc->dev = dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004782
Jeff Garzik2c13b7c2005-11-14 14:14:16 -05004783 ata_qc_reinit(qc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004784 }
4785
4786 return qc;
4787}
4788
Linus Torvalds1da177e2005-04-16 15:20:36 -07004789/**
4790 * ata_qc_free - free unused ata_queued_cmd
4791 * @qc: Command to complete
4792 *
4793 * Designed to free unused ata_queued_cmd object
4794 * in case something prevents using it.
4795 *
4796 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04004797 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004798 */
4799void ata_qc_free(struct ata_queued_cmd *qc)
4800{
Tejun Heo4ba946e2006-01-23 13:09:36 +09004801 struct ata_port *ap = qc->ap;
4802 unsigned int tag;
4803
Tejun Heoa4631472006-02-11 19:11:13 +09004804 WARN_ON(qc == NULL); /* ata_qc_from_tag _might_ return NULL */
Linus Torvalds1da177e2005-04-16 15:20:36 -07004805
Tejun Heo4ba946e2006-01-23 13:09:36 +09004806 qc->flags = 0;
4807 tag = qc->tag;
4808 if (likely(ata_tag_valid(tag))) {
Tejun Heo4ba946e2006-01-23 13:09:36 +09004809 qc->tag = ATA_TAG_POISON;
Tejun Heo6cec4a32006-05-15 21:03:41 +09004810 clear_bit(tag, &ap->qc_allocated);
Tejun Heo4ba946e2006-01-23 13:09:36 +09004811 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07004812}
4813
Tejun Heo76014422006-02-11 15:13:49 +09004814void __ata_qc_complete(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004815{
Tejun Heodedaf2b2006-05-15 21:03:43 +09004816 struct ata_port *ap = qc->ap;
4817
Tejun Heoa4631472006-02-11 19:11:13 +09004818 WARN_ON(qc == NULL); /* ata_qc_from_tag _might_ return NULL */
4819 WARN_ON(!(qc->flags & ATA_QCFLAG_ACTIVE));
Linus Torvalds1da177e2005-04-16 15:20:36 -07004820
4821 if (likely(qc->flags & ATA_QCFLAG_DMAMAP))
4822 ata_sg_clean(qc);
4823
Tejun Heo7401abf2006-05-15 20:57:32 +09004824 /* command should be marked inactive atomically with qc completion */
Tejun Heodedaf2b2006-05-15 21:03:43 +09004825 if (qc->tf.protocol == ATA_PROT_NCQ)
4826 ap->sactive &= ~(1 << qc->tag);
4827 else
4828 ap->active_tag = ATA_TAG_POISON;
Tejun Heo7401abf2006-05-15 20:57:32 +09004829
Albert Lee3f3791d2005-08-16 14:25:38 +08004830 /* atapi: mark qc as inactive to prevent the interrupt handler
4831 * from completing the command twice later, before the error handler
4832 * is called. (when rc != 0 and atapi request sense is needed)
4833 */
4834 qc->flags &= ~ATA_QCFLAG_ACTIVE;
Tejun Heodedaf2b2006-05-15 21:03:43 +09004835 ap->qc_active &= ~(1 << qc->tag);
Albert Lee3f3791d2005-08-16 14:25:38 +08004836
Linus Torvalds1da177e2005-04-16 15:20:36 -07004837 /* call completion callback */
Tejun Heo77853bf2006-01-23 13:09:36 +09004838 qc->complete_fn(qc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004839}
4840
Tejun Heo39599a52006-11-14 22:37:35 +09004841static void fill_result_tf(struct ata_queued_cmd *qc)
4842{
4843 struct ata_port *ap = qc->ap;
4844
Tejun Heo39599a52006-11-14 22:37:35 +09004845 qc->result_tf.flags = qc->tf.flags;
Mark Lord4742d542007-04-02 16:20:35 -04004846 ap->ops->tf_read(ap, &qc->result_tf);
Tejun Heo39599a52006-11-14 22:37:35 +09004847}
4848
Tejun Heof686bcb2006-05-15 20:58:05 +09004849/**
4850 * ata_qc_complete - Complete an active ATA command
4851 * @qc: Command to complete
4852 * @err_mask: ATA Status register contents
4853 *
4854 * Indicate to the mid and upper layers that an ATA
4855 * command has completed, with either an ok or not-ok status.
4856 *
4857 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04004858 * spin_lock_irqsave(host lock)
Tejun Heof686bcb2006-05-15 20:58:05 +09004859 */
4860void ata_qc_complete(struct ata_queued_cmd *qc)
4861{
4862 struct ata_port *ap = qc->ap;
4863
4864 /* XXX: New EH and old EH use different mechanisms to
4865 * synchronize EH with regular execution path.
4866 *
4867 * In new EH, a failed qc is marked with ATA_QCFLAG_FAILED.
4868 * Normal execution path is responsible for not accessing a
4869 * failed qc. libata core enforces the rule by returning NULL
4870 * from ata_qc_from_tag() for failed qcs.
4871 *
4872 * Old EH depends on ata_qc_complete() nullifying completion
4873 * requests if ATA_QCFLAG_EH_SCHEDULED is set. Old EH does
4874 * not synchronize with interrupt handler. Only PIO task is
4875 * taken care of.
4876 */
4877 if (ap->ops->error_handler) {
Tejun Heob51e9e52006-06-29 01:29:30 +09004878 WARN_ON(ap->pflags & ATA_PFLAG_FROZEN);
Tejun Heof686bcb2006-05-15 20:58:05 +09004879
4880 if (unlikely(qc->err_mask))
4881 qc->flags |= ATA_QCFLAG_FAILED;
4882
4883 if (unlikely(qc->flags & ATA_QCFLAG_FAILED)) {
4884 if (!ata_tag_internal(qc->tag)) {
4885 /* always fill result TF for failed qc */
Tejun Heo39599a52006-11-14 22:37:35 +09004886 fill_result_tf(qc);
Tejun Heof686bcb2006-05-15 20:58:05 +09004887 ata_qc_schedule_eh(qc);
4888 return;
4889 }
4890 }
4891
4892 /* read result TF if requested */
4893 if (qc->flags & ATA_QCFLAG_RESULT_TF)
Tejun Heo39599a52006-11-14 22:37:35 +09004894 fill_result_tf(qc);
Tejun Heof686bcb2006-05-15 20:58:05 +09004895
4896 __ata_qc_complete(qc);
4897 } else {
4898 if (qc->flags & ATA_QCFLAG_EH_SCHEDULED)
4899 return;
4900
4901 /* read result TF if failed or requested */
4902 if (qc->err_mask || qc->flags & ATA_QCFLAG_RESULT_TF)
Tejun Heo39599a52006-11-14 22:37:35 +09004903 fill_result_tf(qc);
Tejun Heof686bcb2006-05-15 20:58:05 +09004904
4905 __ata_qc_complete(qc);
4906 }
4907}
4908
Tejun Heodedaf2b2006-05-15 21:03:43 +09004909/**
4910 * ata_qc_complete_multiple - Complete multiple qcs successfully
4911 * @ap: port in question
4912 * @qc_active: new qc_active mask
4913 * @finish_qc: LLDD callback invoked before completing a qc
4914 *
4915 * Complete in-flight commands. This functions is meant to be
4916 * called from low-level driver's interrupt routine to complete
4917 * requests normally. ap->qc_active and @qc_active is compared
4918 * and commands are completed accordingly.
4919 *
4920 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04004921 * spin_lock_irqsave(host lock)
Tejun Heodedaf2b2006-05-15 21:03:43 +09004922 *
4923 * RETURNS:
4924 * Number of completed commands on success, -errno otherwise.
4925 */
4926int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active,
4927 void (*finish_qc)(struct ata_queued_cmd *))
4928{
4929 int nr_done = 0;
4930 u32 done_mask;
4931 int i;
4932
4933 done_mask = ap->qc_active ^ qc_active;
4934
4935 if (unlikely(done_mask & qc_active)) {
4936 ata_port_printk(ap, KERN_ERR, "illegal qc_active transition "
4937 "(%08x->%08x)\n", ap->qc_active, qc_active);
4938 return -EINVAL;
4939 }
4940
4941 for (i = 0; i < ATA_MAX_QUEUE; i++) {
4942 struct ata_queued_cmd *qc;
4943
4944 if (!(done_mask & (1 << i)))
4945 continue;
4946
4947 if ((qc = ata_qc_from_tag(ap, i))) {
4948 if (finish_qc)
4949 finish_qc(qc);
4950 ata_qc_complete(qc);
4951 nr_done++;
4952 }
4953 }
4954
4955 return nr_done;
4956}
4957
Linus Torvalds1da177e2005-04-16 15:20:36 -07004958static inline int ata_should_dma_map(struct ata_queued_cmd *qc)
4959{
4960 struct ata_port *ap = qc->ap;
4961
4962 switch (qc->tf.protocol) {
Tejun Heo3dc1d882006-05-15 21:03:45 +09004963 case ATA_PROT_NCQ:
Linus Torvalds1da177e2005-04-16 15:20:36 -07004964 case ATA_PROT_DMA:
4965 case ATA_PROT_ATAPI_DMA:
4966 return 1;
4967
4968 case ATA_PROT_ATAPI:
4969 case ATA_PROT_PIO:
Linus Torvalds1da177e2005-04-16 15:20:36 -07004970 if (ap->flags & ATA_FLAG_PIO_DMA)
4971 return 1;
4972
4973 /* fall through */
4974
4975 default:
4976 return 0;
4977 }
4978
4979 /* never reached */
4980}
4981
4982/**
4983 * ata_qc_issue - issue taskfile to device
4984 * @qc: command to issue to device
4985 *
4986 * Prepare an ATA command to submission to device.
4987 * This includes mapping the data into a DMA-able
4988 * area, filling in the S/G table, and finally
4989 * writing the taskfile to hardware, starting the command.
4990 *
4991 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04004992 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004993 */
Tejun Heo8e0e6942006-03-31 20:41:11 +09004994void ata_qc_issue(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004995{
4996 struct ata_port *ap = qc->ap;
4997
Tejun Heodedaf2b2006-05-15 21:03:43 +09004998 /* Make sure only one non-NCQ command is outstanding. The
4999 * check is skipped for old EH because it reuses active qc to
5000 * request ATAPI sense.
5001 */
5002 WARN_ON(ap->ops->error_handler && ata_tag_valid(ap->active_tag));
5003
5004 if (qc->tf.protocol == ATA_PROT_NCQ) {
5005 WARN_ON(ap->sactive & (1 << qc->tag));
5006 ap->sactive |= 1 << qc->tag;
5007 } else {
5008 WARN_ON(ap->sactive);
5009 ap->active_tag = qc->tag;
5010 }
5011
Tejun Heoe4a70e72006-03-31 20:36:47 +09005012 qc->flags |= ATA_QCFLAG_ACTIVE;
Tejun Heodedaf2b2006-05-15 21:03:43 +09005013 ap->qc_active |= 1 << qc->tag;
Tejun Heoe4a70e72006-03-31 20:36:47 +09005014
Linus Torvalds1da177e2005-04-16 15:20:36 -07005015 if (ata_should_dma_map(qc)) {
5016 if (qc->flags & ATA_QCFLAG_SG) {
5017 if (ata_sg_setup(qc))
Tejun Heo8e436af2006-01-23 13:09:36 +09005018 goto sg_err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005019 } else if (qc->flags & ATA_QCFLAG_SINGLE) {
5020 if (ata_sg_setup_one(qc))
Tejun Heo8e436af2006-01-23 13:09:36 +09005021 goto sg_err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005022 }
5023 } else {
5024 qc->flags &= ~ATA_QCFLAG_DMAMAP;
5025 }
5026
5027 ap->ops->qc_prep(qc);
5028
Tejun Heo8e0e6942006-03-31 20:41:11 +09005029 qc->err_mask |= ap->ops->qc_issue(qc);
5030 if (unlikely(qc->err_mask))
5031 goto err;
5032 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005033
Tejun Heo8e436af2006-01-23 13:09:36 +09005034sg_err:
5035 qc->flags &= ~ATA_QCFLAG_DMAMAP;
Tejun Heo8e0e6942006-03-31 20:41:11 +09005036 qc->err_mask |= AC_ERR_SYSTEM;
5037err:
5038 ata_qc_complete(qc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005039}
5040
5041/**
5042 * ata_qc_issue_prot - issue taskfile to device in proto-dependent manner
5043 * @qc: command to issue to device
5044 *
5045 * Using various libata functions and hooks, this function
5046 * starts an ATA command. ATA commands are grouped into
5047 * classes called "protocols", and issuing each type of protocol
5048 * is slightly different.
5049 *
Edward Falk0baab862005-06-02 18:17:13 -04005050 * May be used as the qc_issue() entry in ata_port_operations.
5051 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07005052 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04005053 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005054 *
5055 * RETURNS:
Tejun Heo9a3d9eb2006-01-23 13:09:36 +09005056 * Zero on success, AC_ERR_* mask on failure
Linus Torvalds1da177e2005-04-16 15:20:36 -07005057 */
5058
Tejun Heo9a3d9eb2006-01-23 13:09:36 +09005059unsigned int ata_qc_issue_prot(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005060{
5061 struct ata_port *ap = qc->ap;
5062
Albert Leee50362e2005-09-27 17:39:50 +08005063 /* Use polling pio if the LLD doesn't handle
5064 * interrupt driven pio and atapi CDB interrupt.
5065 */
5066 if (ap->flags & ATA_FLAG_PIO_POLLING) {
5067 switch (qc->tf.protocol) {
5068 case ATA_PROT_PIO:
Albert Leee3472cb2006-12-07 11:37:58 +08005069 case ATA_PROT_NODATA:
Albert Leee50362e2005-09-27 17:39:50 +08005070 case ATA_PROT_ATAPI:
5071 case ATA_PROT_ATAPI_NODATA:
5072 qc->tf.flags |= ATA_TFLAG_POLLING;
5073 break;
5074 case ATA_PROT_ATAPI_DMA:
5075 if (qc->dev->flags & ATA_DFLAG_CDB_INTR)
Albert Lee3a778272006-06-22 13:00:25 +08005076 /* see ata_dma_blacklisted() */
Albert Leee50362e2005-09-27 17:39:50 +08005077 BUG();
5078 break;
5079 default:
5080 break;
5081 }
5082 }
5083
Tejun Heo3d3cca32006-11-16 10:50:50 +09005084 /* Some controllers show flaky interrupt behavior after
5085 * setting xfer mode. Use polling instead.
5086 */
5087 if (unlikely(qc->tf.command == ATA_CMD_SET_FEATURES &&
5088 qc->tf.feature == SETFEATURES_XFER) &&
5089 (ap->flags & ATA_FLAG_SETXFER_POLLING))
5090 qc->tf.flags |= ATA_TFLAG_POLLING;
5091
Albert Lee312f7da2005-09-27 17:38:03 +08005092 /* select the device */
Linus Torvalds1da177e2005-04-16 15:20:36 -07005093 ata_dev_select(ap, qc->dev->devno, 1, 0);
5094
Albert Lee312f7da2005-09-27 17:38:03 +08005095 /* start the command */
Linus Torvalds1da177e2005-04-16 15:20:36 -07005096 switch (qc->tf.protocol) {
5097 case ATA_PROT_NODATA:
Albert Lee312f7da2005-09-27 17:38:03 +08005098 if (qc->tf.flags & ATA_TFLAG_POLLING)
5099 ata_qc_set_polling(qc);
5100
Jeff Garzike5338252005-10-30 21:37:17 -05005101 ata_tf_to_host(ap, &qc->tf);
Albert Lee312f7da2005-09-27 17:38:03 +08005102 ap->hsm_task_state = HSM_ST_LAST;
5103
5104 if (qc->tf.flags & ATA_TFLAG_POLLING)
Albert Lee31ce6da2006-04-03 18:31:44 +08005105 ata_port_queue_task(ap, ata_pio_task, qc, 0);
Albert Lee312f7da2005-09-27 17:38:03 +08005106
Linus Torvalds1da177e2005-04-16 15:20:36 -07005107 break;
5108
5109 case ATA_PROT_DMA:
Jeff Garzik587005d2006-02-11 18:17:32 -05005110 WARN_ON(qc->tf.flags & ATA_TFLAG_POLLING);
Albert Lee312f7da2005-09-27 17:38:03 +08005111
Linus Torvalds1da177e2005-04-16 15:20:36 -07005112 ap->ops->tf_load(ap, &qc->tf); /* load tf registers */
5113 ap->ops->bmdma_setup(qc); /* set up bmdma */
5114 ap->ops->bmdma_start(qc); /* initiate bmdma */
Albert Lee312f7da2005-09-27 17:38:03 +08005115 ap->hsm_task_state = HSM_ST_LAST;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005116 break;
5117
Albert Lee312f7da2005-09-27 17:38:03 +08005118 case ATA_PROT_PIO:
5119 if (qc->tf.flags & ATA_TFLAG_POLLING)
5120 ata_qc_set_polling(qc);
5121
Jeff Garzike5338252005-10-30 21:37:17 -05005122 ata_tf_to_host(ap, &qc->tf);
Albert Lee312f7da2005-09-27 17:38:03 +08005123
Albert Lee54f00382005-09-30 19:14:19 +08005124 if (qc->tf.flags & ATA_TFLAG_WRITE) {
5125 /* PIO data out protocol */
5126 ap->hsm_task_state = HSM_ST_FIRST;
Albert Lee31ce6da2006-04-03 18:31:44 +08005127 ata_port_queue_task(ap, ata_pio_task, qc, 0);
Albert Lee54f00382005-09-30 19:14:19 +08005128
5129 /* always send first data block using
Albert Leee27486d2005-11-01 19:24:49 +08005130 * the ata_pio_task() codepath.
Albert Lee54f00382005-09-30 19:14:19 +08005131 */
Albert Lee312f7da2005-09-27 17:38:03 +08005132 } else {
Albert Lee54f00382005-09-30 19:14:19 +08005133 /* PIO data in protocol */
5134 ap->hsm_task_state = HSM_ST;
Albert Lee312f7da2005-09-27 17:38:03 +08005135
Albert Lee54f00382005-09-30 19:14:19 +08005136 if (qc->tf.flags & ATA_TFLAG_POLLING)
Albert Lee31ce6da2006-04-03 18:31:44 +08005137 ata_port_queue_task(ap, ata_pio_task, qc, 0);
Albert Lee312f7da2005-09-27 17:38:03 +08005138
Albert Lee54f00382005-09-30 19:14:19 +08005139 /* if polling, ata_pio_task() handles the rest.
5140 * otherwise, interrupt handler takes over from here.
5141 */
Albert Lee312f7da2005-09-27 17:38:03 +08005142 }
5143
Linus Torvalds1da177e2005-04-16 15:20:36 -07005144 break;
5145
5146 case ATA_PROT_ATAPI:
Linus Torvalds1da177e2005-04-16 15:20:36 -07005147 case ATA_PROT_ATAPI_NODATA:
Albert Lee312f7da2005-09-27 17:38:03 +08005148 if (qc->tf.flags & ATA_TFLAG_POLLING)
5149 ata_qc_set_polling(qc);
5150
Jeff Garzike5338252005-10-30 21:37:17 -05005151 ata_tf_to_host(ap, &qc->tf);
Jeff Garzikf6ef65e2006-01-27 02:45:00 -05005152
Albert Lee312f7da2005-09-27 17:38:03 +08005153 ap->hsm_task_state = HSM_ST_FIRST;
5154
5155 /* send cdb by polling if no cdb interrupt */
5156 if ((!(qc->dev->flags & ATA_DFLAG_CDB_INTR)) ||
5157 (qc->tf.flags & ATA_TFLAG_POLLING))
Albert Lee31ce6da2006-04-03 18:31:44 +08005158 ata_port_queue_task(ap, ata_pio_task, qc, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005159 break;
5160
5161 case ATA_PROT_ATAPI_DMA:
Jeff Garzik587005d2006-02-11 18:17:32 -05005162 WARN_ON(qc->tf.flags & ATA_TFLAG_POLLING);
Albert Lee312f7da2005-09-27 17:38:03 +08005163
Linus Torvalds1da177e2005-04-16 15:20:36 -07005164 ap->ops->tf_load(ap, &qc->tf); /* load tf registers */
5165 ap->ops->bmdma_setup(qc); /* set up bmdma */
Albert Lee312f7da2005-09-27 17:38:03 +08005166 ap->hsm_task_state = HSM_ST_FIRST;
5167
5168 /* send cdb by polling if no cdb interrupt */
5169 if (!(qc->dev->flags & ATA_DFLAG_CDB_INTR))
Albert Lee31ce6da2006-04-03 18:31:44 +08005170 ata_port_queue_task(ap, ata_pio_task, qc, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005171 break;
5172
5173 default:
5174 WARN_ON(1);
Tejun Heo9a3d9eb2006-01-23 13:09:36 +09005175 return AC_ERR_SYSTEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005176 }
5177
5178 return 0;
5179}
5180
5181/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07005182 * ata_host_intr - Handle host interrupt for given (port, task)
5183 * @ap: Port on which interrupt arrived (possibly...)
5184 * @qc: Taskfile currently active in engine
5185 *
5186 * Handle host interrupt for given queued command. Currently,
5187 * only DMA interrupts are handled. All other commands are
5188 * handled via polling with interrupts disabled (nIEN bit).
5189 *
5190 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04005191 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005192 *
5193 * RETURNS:
5194 * One if interrupt was handled, zero if not (shared irq).
5195 */
5196
5197inline unsigned int ata_host_intr (struct ata_port *ap,
5198 struct ata_queued_cmd *qc)
5199{
Tejun Heoea547632006-11-17 12:06:21 +09005200 struct ata_eh_info *ehi = &ap->eh_info;
Albert Lee312f7da2005-09-27 17:38:03 +08005201 u8 status, host_stat = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005202
Albert Lee312f7da2005-09-27 17:38:03 +08005203 VPRINTK("ata%u: protocol %d task_state %d\n",
Tejun Heo44877b42007-02-21 01:06:51 +09005204 ap->print_id, qc->tf.protocol, ap->hsm_task_state);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005205
Albert Lee312f7da2005-09-27 17:38:03 +08005206 /* Check whether we are expecting interrupt in this state */
5207 switch (ap->hsm_task_state) {
5208 case HSM_ST_FIRST:
Albert Lee6912ccd2006-03-25 17:45:49 +08005209 /* Some pre-ATAPI-4 devices assert INTRQ
5210 * at this state when ready to receive CDB.
5211 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07005212
Albert Lee312f7da2005-09-27 17:38:03 +08005213 /* Check the ATA_DFLAG_CDB_INTR flag is enough here.
5214 * The flag was turned on only for atapi devices.
5215 * No need to check is_atapi_taskfile(&qc->tf) again.
5216 */
5217 if (!(qc->dev->flags & ATA_DFLAG_CDB_INTR))
Linus Torvalds1da177e2005-04-16 15:20:36 -07005218 goto idle_irq;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005219 break;
Albert Lee312f7da2005-09-27 17:38:03 +08005220 case HSM_ST_LAST:
5221 if (qc->tf.protocol == ATA_PROT_DMA ||
5222 qc->tf.protocol == ATA_PROT_ATAPI_DMA) {
5223 /* check status of DMA engine */
5224 host_stat = ap->ops->bmdma_status(ap);
Tejun Heo44877b42007-02-21 01:06:51 +09005225 VPRINTK("ata%u: host_stat 0x%X\n",
5226 ap->print_id, host_stat);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005227
Albert Lee312f7da2005-09-27 17:38:03 +08005228 /* if it's not our irq... */
5229 if (!(host_stat & ATA_DMA_INTR))
5230 goto idle_irq;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005231
Albert Lee312f7da2005-09-27 17:38:03 +08005232 /* before we do anything else, clear DMA-Start bit */
5233 ap->ops->bmdma_stop(qc);
Albert Leea4f16612005-12-26 16:40:53 +08005234
5235 if (unlikely(host_stat & ATA_DMA_ERR)) {
5236 /* error when transfering data to/from memory */
5237 qc->err_mask |= AC_ERR_HOST_BUS;
5238 ap->hsm_task_state = HSM_ST_ERR;
5239 }
Albert Lee312f7da2005-09-27 17:38:03 +08005240 }
5241 break;
5242 case HSM_ST:
5243 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005244 default:
5245 goto idle_irq;
5246 }
5247
Albert Lee312f7da2005-09-27 17:38:03 +08005248 /* check altstatus */
5249 status = ata_altstatus(ap);
5250 if (status & ATA_BUSY)
5251 goto idle_irq;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005252
Albert Lee312f7da2005-09-27 17:38:03 +08005253 /* check main status, clearing INTRQ */
5254 status = ata_chk_status(ap);
5255 if (unlikely(status & ATA_BUSY))
5256 goto idle_irq;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005257
Albert Lee312f7da2005-09-27 17:38:03 +08005258 /* ack bmdma irq events */
5259 ap->ops->irq_clear(ap);
5260
Albert Leebb5cb292006-03-25 17:48:02 +08005261 ata_hsm_move(ap, qc, status, 0);
Tejun Heoea547632006-11-17 12:06:21 +09005262
5263 if (unlikely(qc->err_mask) && (qc->tf.protocol == ATA_PROT_DMA ||
5264 qc->tf.protocol == ATA_PROT_ATAPI_DMA))
5265 ata_ehi_push_desc(ehi, "BMDMA stat 0x%x", host_stat);
5266
Linus Torvalds1da177e2005-04-16 15:20:36 -07005267 return 1; /* irq handled */
5268
5269idle_irq:
5270 ap->stats.idle_irq++;
5271
5272#ifdef ATA_IRQ_TRAP
5273 if ((ap->stats.idle_irq % 1000) == 0) {
Akira Iguchi83625002007-01-26 16:27:32 +09005274 ap->ops->irq_ack(ap, 0); /* debug trap */
Tejun Heof15a1da2006-05-15 20:57:56 +09005275 ata_port_printk(ap, KERN_WARNING, "irq trap\n");
Alan Cox23cfce82006-03-21 16:06:53 +00005276 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005277 }
5278#endif
5279 return 0; /* irq not handled */
5280}
5281
5282/**
5283 * ata_interrupt - Default ATA host interrupt handler
Jeff Garzik0cba6322005-05-30 19:49:12 -04005284 * @irq: irq line (unused)
Jeff Garzikcca39742006-08-24 03:19:22 -04005285 * @dev_instance: pointer to our ata_host information structure
Linus Torvalds1da177e2005-04-16 15:20:36 -07005286 *
Jeff Garzik0cba6322005-05-30 19:49:12 -04005287 * Default interrupt handler for PCI IDE devices. Calls
5288 * ata_host_intr() for each port that is not disabled.
5289 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07005290 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04005291 * Obtains host lock during operation.
Linus Torvalds1da177e2005-04-16 15:20:36 -07005292 *
5293 * RETURNS:
Jeff Garzik0cba6322005-05-30 19:49:12 -04005294 * IRQ_NONE or IRQ_HANDLED.
Linus Torvalds1da177e2005-04-16 15:20:36 -07005295 */
5296
David Howells7d12e782006-10-05 14:55:46 +01005297irqreturn_t ata_interrupt (int irq, void *dev_instance)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005298{
Jeff Garzikcca39742006-08-24 03:19:22 -04005299 struct ata_host *host = dev_instance;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005300 unsigned int i;
5301 unsigned int handled = 0;
5302 unsigned long flags;
5303
5304 /* TODO: make _irqsave conditional on x86 PCI IDE legacy mode */
Jeff Garzikcca39742006-08-24 03:19:22 -04005305 spin_lock_irqsave(&host->lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005306
Jeff Garzikcca39742006-08-24 03:19:22 -04005307 for (i = 0; i < host->n_ports; i++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07005308 struct ata_port *ap;
5309
Jeff Garzikcca39742006-08-24 03:19:22 -04005310 ap = host->ports[i];
Tejun Heoc1389502005-08-22 14:59:24 +09005311 if (ap &&
Jeff Garzik029f5462006-04-02 10:30:40 -04005312 !(ap->flags & ATA_FLAG_DISABLED)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07005313 struct ata_queued_cmd *qc;
5314
5315 qc = ata_qc_from_tag(ap, ap->active_tag);
Albert Lee312f7da2005-09-27 17:38:03 +08005316 if (qc && (!(qc->tf.flags & ATA_TFLAG_POLLING)) &&
Albert Lee21b1ed72005-04-29 17:34:59 +08005317 (qc->flags & ATA_QCFLAG_ACTIVE))
Linus Torvalds1da177e2005-04-16 15:20:36 -07005318 handled |= ata_host_intr(ap, qc);
5319 }
5320 }
5321
Jeff Garzikcca39742006-08-24 03:19:22 -04005322 spin_unlock_irqrestore(&host->lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005323
5324 return IRQ_RETVAL(handled);
5325}
5326
Tejun Heo34bf2172006-05-15 20:57:46 +09005327/**
5328 * sata_scr_valid - test whether SCRs are accessible
5329 * @ap: ATA port to test SCR accessibility for
5330 *
5331 * Test whether SCRs are accessible for @ap.
5332 *
5333 * LOCKING:
5334 * None.
5335 *
5336 * RETURNS:
5337 * 1 if SCRs are accessible, 0 otherwise.
5338 */
5339int sata_scr_valid(struct ata_port *ap)
5340{
5341 return ap->cbl == ATA_CBL_SATA && ap->ops->scr_read;
5342}
5343
5344/**
5345 * sata_scr_read - read SCR register of the specified port
5346 * @ap: ATA port to read SCR for
5347 * @reg: SCR to read
5348 * @val: Place to store read value
5349 *
5350 * Read SCR register @reg of @ap into *@val. This function is
5351 * guaranteed to succeed if the cable type of the port is SATA
5352 * and the port implements ->scr_read.
5353 *
5354 * LOCKING:
5355 * None.
5356 *
5357 * RETURNS:
5358 * 0 on success, negative errno on failure.
5359 */
5360int sata_scr_read(struct ata_port *ap, int reg, u32 *val)
5361{
5362 if (sata_scr_valid(ap)) {
5363 *val = ap->ops->scr_read(ap, reg);
5364 return 0;
5365 }
5366 return -EOPNOTSUPP;
5367}
5368
5369/**
5370 * sata_scr_write - write SCR register of the specified port
5371 * @ap: ATA port to write SCR for
5372 * @reg: SCR to write
5373 * @val: value to write
5374 *
5375 * Write @val to SCR register @reg of @ap. This function is
5376 * guaranteed to succeed if the cable type of the port is SATA
5377 * and the port implements ->scr_read.
5378 *
5379 * LOCKING:
5380 * None.
5381 *
5382 * RETURNS:
5383 * 0 on success, negative errno on failure.
5384 */
5385int sata_scr_write(struct ata_port *ap, int reg, u32 val)
5386{
5387 if (sata_scr_valid(ap)) {
5388 ap->ops->scr_write(ap, reg, val);
5389 return 0;
5390 }
5391 return -EOPNOTSUPP;
5392}
5393
5394/**
5395 * sata_scr_write_flush - write SCR register of the specified port and flush
5396 * @ap: ATA port to write SCR for
5397 * @reg: SCR to write
5398 * @val: value to write
5399 *
5400 * This function is identical to sata_scr_write() except that this
5401 * function performs flush after writing to the register.
5402 *
5403 * LOCKING:
5404 * None.
5405 *
5406 * RETURNS:
5407 * 0 on success, negative errno on failure.
5408 */
5409int sata_scr_write_flush(struct ata_port *ap, int reg, u32 val)
5410{
5411 if (sata_scr_valid(ap)) {
5412 ap->ops->scr_write(ap, reg, val);
5413 ap->ops->scr_read(ap, reg);
5414 return 0;
5415 }
5416 return -EOPNOTSUPP;
5417}
5418
5419/**
5420 * ata_port_online - test whether the given port is online
5421 * @ap: ATA port to test
5422 *
5423 * Test whether @ap is online. Note that this function returns 0
5424 * if online status of @ap cannot be obtained, so
5425 * ata_port_online(ap) != !ata_port_offline(ap).
5426 *
5427 * LOCKING:
5428 * None.
5429 *
5430 * RETURNS:
5431 * 1 if the port online status is available and online.
5432 */
5433int ata_port_online(struct ata_port *ap)
5434{
5435 u32 sstatus;
5436
5437 if (!sata_scr_read(ap, SCR_STATUS, &sstatus) && (sstatus & 0xf) == 0x3)
5438 return 1;
5439 return 0;
5440}
5441
5442/**
5443 * ata_port_offline - test whether the given port is offline
5444 * @ap: ATA port to test
5445 *
5446 * Test whether @ap is offline. Note that this function returns
5447 * 0 if offline status of @ap cannot be obtained, so
5448 * ata_port_online(ap) != !ata_port_offline(ap).
5449 *
5450 * LOCKING:
5451 * None.
5452 *
5453 * RETURNS:
5454 * 1 if the port offline status is available and offline.
5455 */
5456int ata_port_offline(struct ata_port *ap)
5457{
5458 u32 sstatus;
5459
5460 if (!sata_scr_read(ap, SCR_STATUS, &sstatus) && (sstatus & 0xf) != 0x3)
5461 return 1;
5462 return 0;
5463}
Edward Falk0baab862005-06-02 18:17:13 -04005464
Tejun Heo77b08fb2006-06-24 20:30:19 +09005465int ata_flush_cache(struct ata_device *dev)
Jens Axboe9b847542006-01-06 09:28:07 +01005466{
Tejun Heo977e6b92006-06-24 20:30:19 +09005467 unsigned int err_mask;
Jens Axboe9b847542006-01-06 09:28:07 +01005468 u8 cmd;
5469
5470 if (!ata_try_flush_cache(dev))
5471 return 0;
5472
Tejun Heo6fc49ad2006-11-11 20:10:45 +09005473 if (dev->flags & ATA_DFLAG_FLUSH_EXT)
Jens Axboe9b847542006-01-06 09:28:07 +01005474 cmd = ATA_CMD_FLUSH_EXT;
5475 else
5476 cmd = ATA_CMD_FLUSH;
5477
Tejun Heo977e6b92006-06-24 20:30:19 +09005478 err_mask = ata_do_simple_cmd(dev, cmd);
5479 if (err_mask) {
5480 ata_dev_printk(dev, KERN_ERR, "failed to flush cache\n");
5481 return -EIO;
5482 }
5483
5484 return 0;
Jens Axboe9b847542006-01-06 09:28:07 +01005485}
5486
Tejun Heo6ffa01d2007-03-02 17:32:47 +09005487#ifdef CONFIG_PM
Jeff Garzikcca39742006-08-24 03:19:22 -04005488static int ata_host_request_pm(struct ata_host *host, pm_message_t mesg,
5489 unsigned int action, unsigned int ehi_flags,
5490 int wait)
Tejun Heo500530f2006-07-03 16:07:27 +09005491{
5492 unsigned long flags;
5493 int i, rc;
5494
Jeff Garzikcca39742006-08-24 03:19:22 -04005495 for (i = 0; i < host->n_ports; i++) {
5496 struct ata_port *ap = host->ports[i];
Tejun Heo500530f2006-07-03 16:07:27 +09005497
5498 /* Previous resume operation might still be in
5499 * progress. Wait for PM_PENDING to clear.
5500 */
5501 if (ap->pflags & ATA_PFLAG_PM_PENDING) {
5502 ata_port_wait_eh(ap);
5503 WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING);
5504 }
5505
5506 /* request PM ops to EH */
5507 spin_lock_irqsave(ap->lock, flags);
5508
5509 ap->pm_mesg = mesg;
5510 if (wait) {
5511 rc = 0;
5512 ap->pm_result = &rc;
5513 }
5514
5515 ap->pflags |= ATA_PFLAG_PM_PENDING;
5516 ap->eh_info.action |= action;
5517 ap->eh_info.flags |= ehi_flags;
5518
5519 ata_port_schedule_eh(ap);
5520
5521 spin_unlock_irqrestore(ap->lock, flags);
5522
5523 /* wait and check result */
5524 if (wait) {
5525 ata_port_wait_eh(ap);
5526 WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING);
5527 if (rc)
5528 return rc;
5529 }
5530 }
5531
5532 return 0;
5533}
5534
5535/**
Jeff Garzikcca39742006-08-24 03:19:22 -04005536 * ata_host_suspend - suspend host
5537 * @host: host to suspend
Tejun Heo500530f2006-07-03 16:07:27 +09005538 * @mesg: PM message
5539 *
Jeff Garzikcca39742006-08-24 03:19:22 -04005540 * Suspend @host. Actual operation is performed by EH. This
Tejun Heo500530f2006-07-03 16:07:27 +09005541 * function requests EH to perform PM operations and waits for EH
5542 * to finish.
5543 *
5544 * LOCKING:
5545 * Kernel thread context (may sleep).
5546 *
5547 * RETURNS:
5548 * 0 on success, -errno on failure.
5549 */
Jeff Garzikcca39742006-08-24 03:19:22 -04005550int ata_host_suspend(struct ata_host *host, pm_message_t mesg)
Tejun Heo500530f2006-07-03 16:07:27 +09005551{
5552 int i, j, rc;
5553
Jeff Garzikcca39742006-08-24 03:19:22 -04005554 rc = ata_host_request_pm(host, mesg, 0, ATA_EHI_QUIET, 1);
Tejun Heo500530f2006-07-03 16:07:27 +09005555 if (rc)
5556 goto fail;
5557
5558 /* EH is quiescent now. Fail if we have any ready device.
5559 * This happens if hotplug occurs between completion of device
5560 * suspension and here.
5561 */
Jeff Garzikcca39742006-08-24 03:19:22 -04005562 for (i = 0; i < host->n_ports; i++) {
5563 struct ata_port *ap = host->ports[i];
Tejun Heo500530f2006-07-03 16:07:27 +09005564
5565 for (j = 0; j < ATA_MAX_DEVICES; j++) {
5566 struct ata_device *dev = &ap->device[j];
5567
5568 if (ata_dev_ready(dev)) {
5569 ata_port_printk(ap, KERN_WARNING,
5570 "suspend failed, device %d "
5571 "still active\n", dev->devno);
5572 rc = -EBUSY;
5573 goto fail;
5574 }
5575 }
5576 }
5577
Jeff Garzikcca39742006-08-24 03:19:22 -04005578 host->dev->power.power_state = mesg;
Tejun Heo500530f2006-07-03 16:07:27 +09005579 return 0;
5580
5581 fail:
Jeff Garzikcca39742006-08-24 03:19:22 -04005582 ata_host_resume(host);
Tejun Heo500530f2006-07-03 16:07:27 +09005583 return rc;
5584}
5585
5586/**
Jeff Garzikcca39742006-08-24 03:19:22 -04005587 * ata_host_resume - resume host
5588 * @host: host to resume
Tejun Heo500530f2006-07-03 16:07:27 +09005589 *
Jeff Garzikcca39742006-08-24 03:19:22 -04005590 * Resume @host. Actual operation is performed by EH. This
Tejun Heo500530f2006-07-03 16:07:27 +09005591 * function requests EH to perform PM operations and returns.
5592 * Note that all resume operations are performed parallely.
5593 *
5594 * LOCKING:
5595 * Kernel thread context (may sleep).
5596 */
Jeff Garzikcca39742006-08-24 03:19:22 -04005597void ata_host_resume(struct ata_host *host)
Tejun Heo500530f2006-07-03 16:07:27 +09005598{
Jeff Garzikcca39742006-08-24 03:19:22 -04005599 ata_host_request_pm(host, PMSG_ON, ATA_EH_SOFTRESET,
5600 ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET, 0);
5601 host->dev->power.power_state = PMSG_ON;
Tejun Heo500530f2006-07-03 16:07:27 +09005602}
Tejun Heo6ffa01d2007-03-02 17:32:47 +09005603#endif
Tejun Heo500530f2006-07-03 16:07:27 +09005604
Randy Dunlapc893a3a2006-01-28 13:15:32 -05005605/**
5606 * ata_port_start - Set port up for dma.
5607 * @ap: Port to initialize
5608 *
5609 * Called just after data structures for each port are
5610 * initialized. Allocates space for PRD table.
5611 *
5612 * May be used as the port_start() entry in ata_port_operations.
5613 *
5614 * LOCKING:
5615 * Inherited from caller.
5616 */
Tejun Heof0d36ef2007-01-20 16:00:28 +09005617int ata_port_start(struct ata_port *ap)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005618{
Brian King2f1f6102006-03-23 17:30:15 -06005619 struct device *dev = ap->dev;
Jeff Garzik6037d6b2005-11-04 22:08:00 -05005620 int rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005621
Tejun Heof0d36ef2007-01-20 16:00:28 +09005622 ap->prd = dmam_alloc_coherent(dev, ATA_PRD_TBL_SZ, &ap->prd_dma,
5623 GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005624 if (!ap->prd)
5625 return -ENOMEM;
5626
Jeff Garzik6037d6b2005-11-04 22:08:00 -05005627 rc = ata_pad_alloc(ap, dev);
Tejun Heof0d36ef2007-01-20 16:00:28 +09005628 if (rc)
Jeff Garzik6037d6b2005-11-04 22:08:00 -05005629 return rc;
Jeff Garzikcedc9a42005-10-05 07:13:30 -04005630
Tejun Heof0d36ef2007-01-20 16:00:28 +09005631 DPRINTK("prd alloc, virt %p, dma %llx\n", ap->prd,
5632 (unsigned long long)ap->prd_dma);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005633 return 0;
5634}
5635
Edward Falk0baab862005-06-02 18:17:13 -04005636/**
Tejun Heo3ef3b432006-05-31 18:27:30 +09005637 * ata_dev_init - Initialize an ata_device structure
5638 * @dev: Device structure to initialize
5639 *
5640 * Initialize @dev in preparation for probing.
5641 *
5642 * LOCKING:
5643 * Inherited from caller.
5644 */
5645void ata_dev_init(struct ata_device *dev)
5646{
5647 struct ata_port *ap = dev->ap;
Tejun Heo72fa4b72006-05-31 18:27:32 +09005648 unsigned long flags;
Tejun Heo3ef3b432006-05-31 18:27:30 +09005649
Tejun Heo5a04bf42006-05-31 18:27:38 +09005650 /* SATA spd limit is bound to the first device */
5651 ap->sata_spd_limit = ap->hw_sata_spd_limit;
5652
Tejun Heo72fa4b72006-05-31 18:27:32 +09005653 /* High bits of dev->flags are used to record warm plug
5654 * requests which occur asynchronously. Synchronize using
Jeff Garzikcca39742006-08-24 03:19:22 -04005655 * host lock.
Tejun Heo72fa4b72006-05-31 18:27:32 +09005656 */
Jeff Garzikba6a1302006-06-22 23:46:10 -04005657 spin_lock_irqsave(ap->lock, flags);
Tejun Heo72fa4b72006-05-31 18:27:32 +09005658 dev->flags &= ~ATA_DFLAG_INIT_MASK;
Jeff Garzikba6a1302006-06-22 23:46:10 -04005659 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heo72fa4b72006-05-31 18:27:32 +09005660
5661 memset((void *)dev + ATA_DEVICE_CLEAR_OFFSET, 0,
5662 sizeof(*dev) - ATA_DEVICE_CLEAR_OFFSET);
Tejun Heo3ef3b432006-05-31 18:27:30 +09005663 dev->pio_mask = UINT_MAX;
5664 dev->mwdma_mask = UINT_MAX;
5665 dev->udma_mask = UINT_MAX;
5666}
5667
5668/**
Tejun Heof3187192007-04-17 23:44:07 +09005669 * ata_port_alloc - allocate and initialize basic ATA port resources
5670 * @host: ATA host this allocated port belongs to
Linus Torvalds1da177e2005-04-16 15:20:36 -07005671 *
Tejun Heof3187192007-04-17 23:44:07 +09005672 * Allocate and initialize basic ATA port resources.
5673 *
5674 * RETURNS:
5675 * Allocate ATA port on success, NULL on failure.
Jeff Garzik0cba6322005-05-30 19:49:12 -04005676 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07005677 * LOCKING:
Tejun Heof3187192007-04-17 23:44:07 +09005678 * Inherited from calling layer (may sleep).
Linus Torvalds1da177e2005-04-16 15:20:36 -07005679 */
Tejun Heof3187192007-04-17 23:44:07 +09005680struct ata_port *ata_port_alloc(struct ata_host *host)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005681{
Tejun Heof3187192007-04-17 23:44:07 +09005682 struct ata_port *ap;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005683 unsigned int i;
5684
Tejun Heof3187192007-04-17 23:44:07 +09005685 DPRINTK("ENTER\n");
5686
5687 ap = kzalloc(sizeof(*ap), GFP_KERNEL);
5688 if (!ap)
5689 return NULL;
5690
Jeff Garzikcca39742006-08-24 03:19:22 -04005691 ap->lock = &host->lock;
Tejun Heo198e0fe2006-04-02 18:51:52 +09005692 ap->flags = ATA_FLAG_DISABLED;
Tejun Heof3187192007-04-17 23:44:07 +09005693 ap->print_id = -1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005694 ap->ctl = ATA_DEVCTL_OBS;
Jeff Garzikcca39742006-08-24 03:19:22 -04005695 ap->host = host;
Tejun Heof3187192007-04-17 23:44:07 +09005696 ap->dev = host->dev;
5697
Tejun Heo5a04bf42006-05-31 18:27:38 +09005698 ap->hw_sata_spd_limit = UINT_MAX;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005699 ap->active_tag = ATA_TAG_POISON;
5700 ap->last_ctl = 0xFF;
Borislav Petkovbd5d8252006-06-11 23:17:01 -04005701
5702#if defined(ATA_VERBOSE_DEBUG)
5703 /* turn on all debugging levels */
5704 ap->msg_enable = 0x00FF;
5705#elif defined(ATA_DEBUG)
5706 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 +09005707#else
Borislav Petkov0dd4b212006-06-23 02:29:08 -04005708 ap->msg_enable = ATA_MSG_DRV | ATA_MSG_ERR | ATA_MSG_WARN;
Borislav Petkovbd5d8252006-06-11 23:17:01 -04005709#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07005710
David Howells65f27f32006-11-22 14:55:48 +00005711 INIT_DELAYED_WORK(&ap->port_task, NULL);
5712 INIT_DELAYED_WORK(&ap->hotplug_task, ata_scsi_hotplug);
5713 INIT_WORK(&ap->scsi_rescan_task, ata_scsi_dev_rescan);
Tejun Heoa72ec4c2006-01-23 13:09:37 +09005714 INIT_LIST_HEAD(&ap->eh_done_q);
Tejun Heoc6cf9e92006-05-31 18:27:27 +09005715 init_waitqueue_head(&ap->eh_wait_q);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005716
Tejun Heo838df622006-05-15 20:57:44 +09005717 ap->cbl = ATA_CBL_NONE;
Tejun Heo838df622006-05-15 20:57:44 +09005718
Tejun Heoacf356b2006-03-24 14:07:50 +09005719 for (i = 0; i < ATA_MAX_DEVICES; i++) {
5720 struct ata_device *dev = &ap->device[i];
Tejun Heo38d87232006-05-15 20:57:51 +09005721 dev->ap = ap;
Tejun Heo72fa4b72006-05-31 18:27:32 +09005722 dev->devno = i;
Tejun Heo3ef3b432006-05-31 18:27:30 +09005723 ata_dev_init(dev);
Tejun Heoacf356b2006-03-24 14:07:50 +09005724 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07005725
5726#ifdef ATA_IRQ_TRAP
5727 ap->stats.unhandled_irq = 1;
5728 ap->stats.idle_irq = 1;
5729#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07005730 return ap;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005731}
5732
Tejun Heof0d36ef2007-01-20 16:00:28 +09005733static void ata_host_release(struct device *gendev, void *res)
5734{
5735 struct ata_host *host = dev_get_drvdata(gendev);
5736 int i;
5737
5738 for (i = 0; i < host->n_ports; i++) {
5739 struct ata_port *ap = host->ports[i];
5740
Tejun Heoecef7252007-04-17 23:44:06 +09005741 if (!ap)
5742 continue;
5743
5744 if ((host->flags & ATA_HOST_STARTED) && ap->ops->port_stop)
Tejun Heof0d36ef2007-01-20 16:00:28 +09005745 ap->ops->port_stop(ap);
Tejun Heof0d36ef2007-01-20 16:00:28 +09005746 }
5747
Tejun Heoecef7252007-04-17 23:44:06 +09005748 if ((host->flags & ATA_HOST_STARTED) && host->ops->host_stop)
Tejun Heof0d36ef2007-01-20 16:00:28 +09005749 host->ops->host_stop(host);
Tejun Heo1aa56cc2007-02-27 22:33:21 +09005750
Tejun Heo1aa506e2007-03-09 19:36:12 +09005751 for (i = 0; i < host->n_ports; i++) {
5752 struct ata_port *ap = host->ports[i];
5753
Tejun Heo49114872007-04-17 23:44:06 +09005754 if (!ap)
5755 continue;
5756
5757 if (ap->scsi_host)
Tejun Heo1aa506e2007-03-09 19:36:12 +09005758 scsi_host_put(ap->scsi_host);
5759
Tejun Heo49114872007-04-17 23:44:06 +09005760 kfree(ap);
Tejun Heo1aa506e2007-03-09 19:36:12 +09005761 host->ports[i] = NULL;
5762 }
5763
Tejun Heo1aa56cc2007-02-27 22:33:21 +09005764 dev_set_drvdata(gendev, NULL);
Tejun Heof0d36ef2007-01-20 16:00:28 +09005765}
5766
Linus Torvalds1da177e2005-04-16 15:20:36 -07005767/**
Tejun Heof3187192007-04-17 23:44:07 +09005768 * ata_host_alloc - allocate and init basic ATA host resources
5769 * @dev: generic device this host is associated with
5770 * @max_ports: maximum number of ATA ports associated with this host
5771 *
5772 * Allocate and initialize basic ATA host resources. LLD calls
5773 * this function to allocate a host, initializes it fully and
5774 * attaches it using ata_host_register().
5775 *
5776 * @max_ports ports are allocated and host->n_ports is
5777 * initialized to @max_ports. The caller is allowed to decrease
5778 * host->n_ports before calling ata_host_register(). The unused
5779 * ports will be automatically freed on registration.
5780 *
5781 * RETURNS:
5782 * Allocate ATA host on success, NULL on failure.
5783 *
5784 * LOCKING:
5785 * Inherited from calling layer (may sleep).
5786 */
5787struct ata_host *ata_host_alloc(struct device *dev, int max_ports)
5788{
5789 struct ata_host *host;
5790 size_t sz;
5791 int i;
5792
5793 DPRINTK("ENTER\n");
5794
5795 if (!devres_open_group(dev, NULL, GFP_KERNEL))
5796 return NULL;
5797
5798 /* alloc a container for our list of ATA ports (buses) */
5799 sz = sizeof(struct ata_host) + (max_ports + 1) * sizeof(void *);
5800 /* alloc a container for our list of ATA ports (buses) */
5801 host = devres_alloc(ata_host_release, sz, GFP_KERNEL);
5802 if (!host)
5803 goto err_out;
5804
5805 devres_add(dev, host);
5806 dev_set_drvdata(dev, host);
5807
5808 spin_lock_init(&host->lock);
5809 host->dev = dev;
5810 host->n_ports = max_ports;
5811
5812 /* allocate ports bound to this host */
5813 for (i = 0; i < max_ports; i++) {
5814 struct ata_port *ap;
5815
5816 ap = ata_port_alloc(host);
5817 if (!ap)
5818 goto err_out;
5819
5820 ap->port_no = i;
5821 host->ports[i] = ap;
5822 }
5823
5824 devres_remove_group(dev, NULL);
5825 return host;
5826
5827 err_out:
5828 devres_release_group(dev, NULL);
5829 return NULL;
5830}
5831
5832/**
Tejun Heof5cda252007-04-17 23:44:07 +09005833 * ata_host_alloc_pinfo - alloc host and init with port_info array
5834 * @dev: generic device this host is associated with
5835 * @ppi: array of ATA port_info to initialize host with
5836 * @n_ports: number of ATA ports attached to this host
5837 *
5838 * Allocate ATA host and initialize with info from @ppi. If NULL
5839 * terminated, @ppi may contain fewer entries than @n_ports. The
5840 * last entry will be used for the remaining ports.
5841 *
5842 * RETURNS:
5843 * Allocate ATA host on success, NULL on failure.
5844 *
5845 * LOCKING:
5846 * Inherited from calling layer (may sleep).
5847 */
5848struct ata_host *ata_host_alloc_pinfo(struct device *dev,
5849 const struct ata_port_info * const * ppi,
5850 int n_ports)
5851{
5852 const struct ata_port_info *pi;
5853 struct ata_host *host;
5854 int i, j;
5855
5856 host = ata_host_alloc(dev, n_ports);
5857 if (!host)
5858 return NULL;
5859
5860 for (i = 0, j = 0, pi = NULL; i < host->n_ports; i++) {
5861 struct ata_port *ap = host->ports[i];
5862
5863 if (ppi[j])
5864 pi = ppi[j++];
5865
5866 ap->pio_mask = pi->pio_mask;
5867 ap->mwdma_mask = pi->mwdma_mask;
5868 ap->udma_mask = pi->udma_mask;
5869 ap->flags |= pi->flags;
5870 ap->ops = pi->port_ops;
5871
5872 if (!host->ops && (pi->port_ops != &ata_dummy_port_ops))
5873 host->ops = pi->port_ops;
5874 if (!host->private_data && pi->private_data)
5875 host->private_data = pi->private_data;
5876 }
5877
5878 return host;
5879}
5880
5881/**
Tejun Heoecef7252007-04-17 23:44:06 +09005882 * ata_host_start - start and freeze ports of an ATA host
5883 * @host: ATA host to start ports for
5884 *
5885 * Start and then freeze ports of @host. Started status is
5886 * recorded in host->flags, so this function can be called
5887 * multiple times. Ports are guaranteed to get started only
Tejun Heof3187192007-04-17 23:44:07 +09005888 * once. If host->ops isn't initialized yet, its set to the
5889 * first non-dummy port ops.
Tejun Heoecef7252007-04-17 23:44:06 +09005890 *
5891 * LOCKING:
5892 * Inherited from calling layer (may sleep).
5893 *
5894 * RETURNS:
5895 * 0 if all ports are started successfully, -errno otherwise.
5896 */
5897int ata_host_start(struct ata_host *host)
5898{
5899 int i, rc;
5900
5901 if (host->flags & ATA_HOST_STARTED)
5902 return 0;
5903
5904 for (i = 0; i < host->n_ports; i++) {
5905 struct ata_port *ap = host->ports[i];
5906
Tejun Heof3187192007-04-17 23:44:07 +09005907 if (!host->ops && !ata_port_is_dummy(ap))
5908 host->ops = ap->ops;
5909
Tejun Heoecef7252007-04-17 23:44:06 +09005910 if (ap->ops->port_start) {
5911 rc = ap->ops->port_start(ap);
5912 if (rc) {
5913 ata_port_printk(ap, KERN_ERR, "failed to "
5914 "start port (errno=%d)\n", rc);
5915 goto err_out;
5916 }
5917 }
5918
5919 ata_eh_freeze_port(ap);
5920 }
5921
5922 host->flags |= ATA_HOST_STARTED;
5923 return 0;
5924
5925 err_out:
5926 while (--i >= 0) {
5927 struct ata_port *ap = host->ports[i];
5928
5929 if (ap->ops->port_stop)
5930 ap->ops->port_stop(ap);
5931 }
5932 return rc;
5933}
5934
5935/**
Jeff Garzikcca39742006-08-24 03:19:22 -04005936 * ata_sas_host_init - Initialize a host struct
5937 * @host: host to initialize
5938 * @dev: device host is attached to
5939 * @flags: host flags
5940 * @ops: port_ops
Brian Kingb03732f2006-08-07 14:27:10 -05005941 *
5942 * LOCKING:
5943 * PCI/etc. bus probe sem.
5944 *
5945 */
Tejun Heof3187192007-04-17 23:44:07 +09005946/* KILLME - the only user left is ipr */
Jeff Garzikcca39742006-08-24 03:19:22 -04005947void ata_host_init(struct ata_host *host, struct device *dev,
5948 unsigned long flags, const struct ata_port_operations *ops)
Brian Kingb03732f2006-08-07 14:27:10 -05005949{
Jeff Garzikcca39742006-08-24 03:19:22 -04005950 spin_lock_init(&host->lock);
5951 host->dev = dev;
5952 host->flags = flags;
5953 host->ops = ops;
Brian Kingb03732f2006-08-07 14:27:10 -05005954}
5955
5956/**
Tejun Heof3187192007-04-17 23:44:07 +09005957 * ata_host_register - register initialized ATA host
5958 * @host: ATA host to register
5959 * @sht: template for SCSI host
Jeff Garzik0cba6322005-05-30 19:49:12 -04005960 *
Tejun Heof3187192007-04-17 23:44:07 +09005961 * Register initialized ATA host. @host is allocated using
5962 * ata_host_alloc() and fully initialized by LLD. This function
5963 * starts ports, registers @host with ATA and SCSI layers and
5964 * probe registered devices.
Linus Torvalds1da177e2005-04-16 15:20:36 -07005965 *
5966 * LOCKING:
Tejun Heof3187192007-04-17 23:44:07 +09005967 * Inherited from calling layer (may sleep).
Linus Torvalds1da177e2005-04-16 15:20:36 -07005968 *
5969 * RETURNS:
Tejun Heof3187192007-04-17 23:44:07 +09005970 * 0 on success, -errno otherwise.
Linus Torvalds1da177e2005-04-16 15:20:36 -07005971 */
Tejun Heof3187192007-04-17 23:44:07 +09005972int ata_host_register(struct ata_host *host, struct scsi_host_template *sht)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005973{
Tejun Heof3187192007-04-17 23:44:07 +09005974 int i, rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005975
Tejun Heof3187192007-04-17 23:44:07 +09005976 /* host must have been started */
5977 if (!(host->flags & ATA_HOST_STARTED)) {
5978 dev_printk(KERN_ERR, host->dev,
5979 "BUG: trying to register unstarted host\n");
5980 WARN_ON(1);
5981 return -EINVAL;
Alan Cox02f076a2006-09-26 17:35:32 +01005982 }
Tejun Heof0d36ef2007-01-20 16:00:28 +09005983
Tejun Heof3187192007-04-17 23:44:07 +09005984 /* Blow away unused ports. This happens when LLD can't
5985 * determine the exact number of ports to allocate at
5986 * allocation time.
5987 */
5988 for (i = host->n_ports; host->ports[i]; i++)
5989 kfree(host->ports[i]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005990
Tejun Heof3187192007-04-17 23:44:07 +09005991 /* give ports names and add SCSI hosts */
5992 for (i = 0; i < host->n_ports; i++)
5993 host->ports[i]->print_id = ata_print_id++;
Tejun Heof0d36ef2007-01-20 16:00:28 +09005994
Tejun Heof3187192007-04-17 23:44:07 +09005995 rc = ata_scsi_add_hosts(host, sht);
Tejun Heoecef7252007-04-17 23:44:06 +09005996 if (rc)
Tejun Heof3187192007-04-17 23:44:07 +09005997 return rc;
Tejun Heoecef7252007-04-17 23:44:06 +09005998
Tejun Heof3187192007-04-17 23:44:07 +09005999 /* set cable, sata_spd_limit and report */
Jeff Garzikcca39742006-08-24 03:19:22 -04006000 for (i = 0; i < host->n_ports; i++) {
6001 struct ata_port *ap = host->ports[i];
Tejun Heof3187192007-04-17 23:44:07 +09006002 int irq_line;
Tejun Heo5a04bf42006-05-31 18:27:38 +09006003 u32 scontrol;
Tejun Heof3187192007-04-17 23:44:07 +09006004 unsigned long xfer_mask;
6005
6006 /* set SATA cable type if still unset */
6007 if (ap->cbl == ATA_CBL_NONE && (ap->flags & ATA_FLAG_SATA))
6008 ap->cbl = ATA_CBL_SATA;
Linus Torvalds1da177e2005-04-16 15:20:36 -07006009
Tejun Heo5a04bf42006-05-31 18:27:38 +09006010 /* init sata_spd_limit to the current value */
6011 if (sata_scr_read(ap, SCR_CONTROL, &scontrol) == 0) {
6012 int spd = (scontrol >> 4) & 0xf;
6013 ap->hw_sata_spd_limit &= (1 << spd) - 1;
6014 }
6015 ap->sata_spd_limit = ap->hw_sata_spd_limit;
6016
Tejun Heof3187192007-04-17 23:44:07 +09006017 /* report the secondary IRQ for second channel legacy */
6018 irq_line = host->irq;
6019 if (i == 1 && host->irq2)
6020 irq_line = host->irq2;
Tejun Heo3e706392006-05-31 18:28:11 +09006021
Tejun Heof3187192007-04-17 23:44:07 +09006022 xfer_mask = ata_pack_xfermask(ap->pio_mask, ap->mwdma_mask,
6023 ap->udma_mask);
6024
6025 /* print per-port info to dmesg */
6026 if (!ata_port_is_dummy(ap))
6027 ata_port_printk(ap, KERN_INFO, "%cATA max %s cmd 0x%p "
6028 "ctl 0x%p bmdma 0x%p irq %d\n",
6029 ap->cbl == ATA_CBL_SATA ? 'S' : 'P',
6030 ata_mode_string(xfer_mask),
6031 ap->ioaddr.cmd_addr,
6032 ap->ioaddr.ctl_addr,
6033 ap->ioaddr.bmdma_addr,
6034 irq_line);
6035 else
6036 ata_port_printk(ap, KERN_INFO, "DUMMY\n");
6037 }
6038
6039 /* perform each probe synchronously */
6040 DPRINTK("probe begin\n");
6041 for (i = 0; i < host->n_ports; i++) {
6042 struct ata_port *ap = host->ports[i];
6043 int rc;
6044
6045 /* probe */
Tejun Heo52783c52006-05-31 18:28:22 +09006046 if (ap->ops->error_handler) {
Tejun Heo1cdaf532006-07-03 16:07:26 +09006047 struct ata_eh_info *ehi = &ap->eh_info;
Tejun Heo3e706392006-05-31 18:28:11 +09006048 unsigned long flags;
6049
6050 ata_port_probe(ap);
6051
6052 /* kick EH for boot probing */
Jeff Garzikba6a1302006-06-22 23:46:10 -04006053 spin_lock_irqsave(ap->lock, flags);
Tejun Heo3e706392006-05-31 18:28:11 +09006054
Tejun Heo1cdaf532006-07-03 16:07:26 +09006055 ehi->probe_mask = (1 << ATA_MAX_DEVICES) - 1;
6056 ehi->action |= ATA_EH_SOFTRESET;
6057 ehi->flags |= ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET;
Tejun Heo3e706392006-05-31 18:28:11 +09006058
Tejun Heob51e9e52006-06-29 01:29:30 +09006059 ap->pflags |= ATA_PFLAG_LOADING;
Tejun Heo3e706392006-05-31 18:28:11 +09006060 ata_port_schedule_eh(ap);
6061
Jeff Garzikba6a1302006-06-22 23:46:10 -04006062 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heo3e706392006-05-31 18:28:11 +09006063
6064 /* wait for EH to finish */
6065 ata_port_wait_eh(ap);
6066 } else {
Tejun Heo44877b42007-02-21 01:06:51 +09006067 DPRINTK("ata%u: bus probe begin\n", ap->print_id);
Tejun Heo3e706392006-05-31 18:28:11 +09006068 rc = ata_bus_probe(ap);
Tejun Heo44877b42007-02-21 01:06:51 +09006069 DPRINTK("ata%u: bus probe end\n", ap->print_id);
Tejun Heo3e706392006-05-31 18:28:11 +09006070
6071 if (rc) {
6072 /* FIXME: do something useful here?
6073 * Current libata behavior will
6074 * tear down everything when
6075 * the module is removed
6076 * or the h/w is unplugged.
6077 */
6078 }
6079 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07006080 }
6081
6082 /* probes are done, now scan each port's disk(s) */
Randy Dunlapc893a3a2006-01-28 13:15:32 -05006083 DPRINTK("host probe begin\n");
Jeff Garzikcca39742006-08-24 03:19:22 -04006084 for (i = 0; i < host->n_ports; i++) {
6085 struct ata_port *ap = host->ports[i];
Linus Torvalds1da177e2005-04-16 15:20:36 -07006086
Jeff Garzik644dd0c2005-10-03 15:55:19 -04006087 ata_scsi_scan_host(ap);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006088 }
6089
Tejun Heof3187192007-04-17 23:44:07 +09006090 return 0;
6091}
6092
6093/**
Tejun Heof5cda252007-04-17 23:44:07 +09006094 * ata_host_activate - start host, request IRQ and register it
6095 * @host: target ATA host
6096 * @irq: IRQ to request
6097 * @irq_handler: irq_handler used when requesting IRQ
6098 * @irq_flags: irq_flags used when requesting IRQ
6099 * @sht: scsi_host_template to use when registering the host
6100 *
6101 * After allocating an ATA host and initializing it, most libata
6102 * LLDs perform three steps to activate the host - start host,
6103 * request IRQ and register it. This helper takes necessasry
6104 * arguments and performs the three steps in one go.
6105 *
6106 * LOCKING:
6107 * Inherited from calling layer (may sleep).
6108 *
6109 * RETURNS:
6110 * 0 on success, -errno otherwise.
6111 */
6112int ata_host_activate(struct ata_host *host, int irq,
6113 irq_handler_t irq_handler, unsigned long irq_flags,
6114 struct scsi_host_template *sht)
6115{
6116 int rc;
6117
6118 rc = ata_host_start(host);
6119 if (rc)
6120 return rc;
6121
6122 rc = devm_request_irq(host->dev, irq, irq_handler, irq_flags,
6123 dev_driver_string(host->dev), host);
6124 if (rc)
6125 return rc;
6126
6127 rc = ata_host_register(host, sht);
6128 /* if failed, just free the IRQ and leave ports alone */
6129 if (rc)
6130 devm_free_irq(host->dev, irq, host);
6131
6132 return rc;
6133}
6134
6135/**
Tejun Heof3187192007-04-17 23:44:07 +09006136 * ata_device_add - Register hardware device with ATA and SCSI layers
6137 * @ent: Probe information describing hardware device to be registered
6138 *
6139 * This function processes the information provided in the probe
6140 * information struct @ent, allocates the necessary ATA and SCSI
6141 * host information structures, initializes them, and registers
6142 * everything with requisite kernel subsystems.
6143 *
6144 * This function requests irqs, probes the ATA bus, and probes
6145 * the SCSI bus.
6146 *
6147 * LOCKING:
6148 * PCI/etc. bus probe sem.
6149 *
6150 * RETURNS:
6151 * Number of ports registered. Zero on error (no ports registered).
6152 */
6153int ata_device_add(const struct ata_probe_ent *ent)
6154{
6155 unsigned int i;
6156 struct device *dev = ent->dev;
6157 struct ata_host *host;
6158 int rc;
6159
6160 DPRINTK("ENTER\n");
6161
6162 if (ent->irq == 0) {
6163 dev_printk(KERN_ERR, dev, "is not available: No interrupt assigned.\n");
6164 return 0;
6165 }
6166
6167 if (!ent->port_ops->error_handler &&
6168 !(ent->port_flags & (ATA_FLAG_SATA_RESET | ATA_FLAG_SRST))) {
6169 dev_printk(KERN_ERR, dev, "no reset mechanism available\n");
6170 return 0;
6171 }
6172
6173 if (!devres_open_group(dev, ata_device_add, GFP_KERNEL))
6174 return 0;
6175
6176 /* allocate host */
6177 host = ata_host_alloc(dev, ent->n_ports);
6178
6179 host->irq = ent->irq;
6180 host->irq2 = ent->irq2;
6181 host->iomap = ent->iomap;
6182 host->private_data = ent->private_data;
6183 host->ops = ent->port_ops;
6184 host->flags = ent->_host_flags;
6185
6186 for (i = 0; i < host->n_ports; i++) {
6187 struct ata_port *ap = host->ports[i];
6188
6189 /* dummy? */
6190 if (ent->dummy_port_mask & (1 << i)) {
6191 ap->ops = &ata_dummy_port_ops;
6192 continue;
6193 }
6194
6195 if (ap->port_no == 1 && ent->pinfo2) {
6196 ap->pio_mask = ent->pinfo2->pio_mask;
6197 ap->mwdma_mask = ent->pinfo2->mwdma_mask;
6198 ap->udma_mask = ent->pinfo2->udma_mask;
6199 ap->flags |= ent->pinfo2->flags;
6200 ap->ops = ent->pinfo2->port_ops;
6201 } else {
6202 ap->pio_mask = ent->pio_mask;
6203 ap->mwdma_mask = ent->mwdma_mask;
6204 ap->udma_mask = ent->udma_mask;
6205 ap->flags |= ent->port_flags;
6206 ap->ops = ent->port_ops;
6207 }
6208
6209 memcpy(&ap->ioaddr, &ent->port[ap->port_no],
6210 sizeof(struct ata_ioports));
6211 }
6212
6213 /* start and freeze ports before requesting IRQ */
6214 rc = ata_host_start(host);
6215 if (rc)
6216 goto err_out;
6217
6218 /* obtain irq, that may be shared between channels */
6219 rc = devm_request_irq(dev, ent->irq, ent->port_ops->irq_handler,
6220 ent->irq_flags, DRV_NAME, host);
6221 if (rc) {
6222 dev_printk(KERN_ERR, dev, "irq %lu request failed: %d\n",
6223 ent->irq, rc);
6224 goto err_out;
6225 }
6226
6227 /* do we have a second IRQ for the other channel, eg legacy mode */
6228 if (ent->irq2) {
6229 /* We will get weird core code crashes later if this is true
6230 so trap it now */
6231 BUG_ON(ent->irq == ent->irq2);
6232
6233 rc = devm_request_irq(dev, ent->irq2,
6234 ent->port_ops->irq_handler, ent->irq_flags,
6235 DRV_NAME, host);
6236 if (rc) {
6237 dev_printk(KERN_ERR, dev, "irq %lu request failed: %d\n",
6238 ent->irq2, rc);
6239 goto err_out;
6240 }
6241 }
6242
6243 /* resource acquisition complete */
6244 devres_remove_group(dev, ata_device_add);
6245
6246 /* register */
6247 rc = ata_host_register(host, ent->sht);
6248 if (rc)
6249 goto err_out;
6250
6251 VPRINTK("EXIT, returning %u\n", host->n_ports);
6252 return host->n_ports; /* success */
Linus Torvalds1da177e2005-04-16 15:20:36 -07006253
Tejun Heof0d36ef2007-01-20 16:00:28 +09006254 err_out:
6255 devres_release_group(dev, ata_device_add);
Tejun Heof3187192007-04-17 23:44:07 +09006256 VPRINTK("EXIT, returning 0\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07006257 return 0;
6258}
6259
6260/**
Tejun Heo720ba122006-05-31 18:28:13 +09006261 * ata_port_detach - Detach ATA port in prepration of device removal
6262 * @ap: ATA port to be detached
6263 *
6264 * Detach all ATA devices and the associated SCSI devices of @ap;
6265 * then, remove the associated SCSI host. @ap is guaranteed to
6266 * be quiescent on return from this function.
6267 *
6268 * LOCKING:
6269 * Kernel thread context (may sleep).
6270 */
6271void ata_port_detach(struct ata_port *ap)
6272{
6273 unsigned long flags;
6274 int i;
6275
6276 if (!ap->ops->error_handler)
Tejun Heoc3cf30a2006-08-05 03:59:11 +09006277 goto skip_eh;
Tejun Heo720ba122006-05-31 18:28:13 +09006278
6279 /* tell EH we're leaving & flush EH */
Jeff Garzikba6a1302006-06-22 23:46:10 -04006280 spin_lock_irqsave(ap->lock, flags);
Tejun Heob51e9e52006-06-29 01:29:30 +09006281 ap->pflags |= ATA_PFLAG_UNLOADING;
Jeff Garzikba6a1302006-06-22 23:46:10 -04006282 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heo720ba122006-05-31 18:28:13 +09006283
6284 ata_port_wait_eh(ap);
6285
6286 /* EH is now guaranteed to see UNLOADING, so no new device
6287 * will be attached. Disable all existing devices.
6288 */
Jeff Garzikba6a1302006-06-22 23:46:10 -04006289 spin_lock_irqsave(ap->lock, flags);
Tejun Heo720ba122006-05-31 18:28:13 +09006290
6291 for (i = 0; i < ATA_MAX_DEVICES; i++)
6292 ata_dev_disable(&ap->device[i]);
6293
Jeff Garzikba6a1302006-06-22 23:46:10 -04006294 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heo720ba122006-05-31 18:28:13 +09006295
6296 /* Final freeze & EH. All in-flight commands are aborted. EH
6297 * will be skipped and retrials will be terminated with bad
6298 * target.
6299 */
Jeff Garzikba6a1302006-06-22 23:46:10 -04006300 spin_lock_irqsave(ap->lock, flags);
Tejun Heo720ba122006-05-31 18:28:13 +09006301 ata_port_freeze(ap); /* won't be thawed */
Jeff Garzikba6a1302006-06-22 23:46:10 -04006302 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heo720ba122006-05-31 18:28:13 +09006303
6304 ata_port_wait_eh(ap);
6305
6306 /* Flush hotplug task. The sequence is similar to
6307 * ata_port_flush_task().
6308 */
6309 flush_workqueue(ata_aux_wq);
6310 cancel_delayed_work(&ap->hotplug_task);
6311 flush_workqueue(ata_aux_wq);
6312
Tejun Heoc3cf30a2006-08-05 03:59:11 +09006313 skip_eh:
Tejun Heo720ba122006-05-31 18:28:13 +09006314 /* remove the associated SCSI host */
Jeff Garzikcca39742006-08-24 03:19:22 -04006315 scsi_remove_host(ap->scsi_host);
Tejun Heo720ba122006-05-31 18:28:13 +09006316}
6317
6318/**
Tejun Heo0529c152007-01-20 16:00:26 +09006319 * ata_host_detach - Detach all ports of an ATA host
6320 * @host: Host to detach
6321 *
6322 * Detach all ports of @host.
6323 *
6324 * LOCKING:
6325 * Kernel thread context (may sleep).
6326 */
6327void ata_host_detach(struct ata_host *host)
6328{
6329 int i;
6330
6331 for (i = 0; i < host->n_ports; i++)
6332 ata_port_detach(host->ports[i]);
6333}
6334
Brian Kingf6d950e2006-08-07 14:27:24 -05006335struct ata_probe_ent *
6336ata_probe_ent_alloc(struct device *dev, const struct ata_port_info *port)
6337{
6338 struct ata_probe_ent *probe_ent;
6339
Tejun Heo4d054472007-02-18 02:24:37 +09006340 probe_ent = devm_kzalloc(dev, sizeof(*probe_ent), GFP_KERNEL);
Brian Kingf6d950e2006-08-07 14:27:24 -05006341 if (!probe_ent) {
6342 printk(KERN_ERR DRV_NAME "(%s): out of memory\n",
6343 kobject_name(&(dev->kobj)));
6344 return NULL;
6345 }
6346
6347 INIT_LIST_HEAD(&probe_ent->node);
6348 probe_ent->dev = dev;
6349
6350 probe_ent->sht = port->sht;
Jeff Garzikcca39742006-08-24 03:19:22 -04006351 probe_ent->port_flags = port->flags;
Brian Kingf6d950e2006-08-07 14:27:24 -05006352 probe_ent->pio_mask = port->pio_mask;
6353 probe_ent->mwdma_mask = port->mwdma_mask;
6354 probe_ent->udma_mask = port->udma_mask;
6355 probe_ent->port_ops = port->port_ops;
Jeff Garzikd639ca92006-09-28 03:48:18 -04006356 probe_ent->private_data = port->private_data;
Brian Kingf6d950e2006-08-07 14:27:24 -05006357
6358 return probe_ent;
6359}
6360
Linus Torvalds1da177e2005-04-16 15:20:36 -07006361/**
6362 * ata_std_ports - initialize ioaddr with standard port offsets.
6363 * @ioaddr: IO address structure to be initialized
Edward Falk0baab862005-06-02 18:17:13 -04006364 *
6365 * Utility function which initializes data_addr, error_addr,
6366 * feature_addr, nsect_addr, lbal_addr, lbam_addr, lbah_addr,
6367 * device_addr, status_addr, and command_addr to standard offsets
6368 * relative to cmd_addr.
6369 *
6370 * Does not set ctl_addr, altstatus_addr, bmdma_addr, or scr_addr.
Linus Torvalds1da177e2005-04-16 15:20:36 -07006371 */
Edward Falk0baab862005-06-02 18:17:13 -04006372
Linus Torvalds1da177e2005-04-16 15:20:36 -07006373void ata_std_ports(struct ata_ioports *ioaddr)
6374{
6375 ioaddr->data_addr = ioaddr->cmd_addr + ATA_REG_DATA;
6376 ioaddr->error_addr = ioaddr->cmd_addr + ATA_REG_ERR;
6377 ioaddr->feature_addr = ioaddr->cmd_addr + ATA_REG_FEATURE;
6378 ioaddr->nsect_addr = ioaddr->cmd_addr + ATA_REG_NSECT;
6379 ioaddr->lbal_addr = ioaddr->cmd_addr + ATA_REG_LBAL;
6380 ioaddr->lbam_addr = ioaddr->cmd_addr + ATA_REG_LBAM;
6381 ioaddr->lbah_addr = ioaddr->cmd_addr + ATA_REG_LBAH;
6382 ioaddr->device_addr = ioaddr->cmd_addr + ATA_REG_DEVICE;
6383 ioaddr->status_addr = ioaddr->cmd_addr + ATA_REG_STATUS;
6384 ioaddr->command_addr = ioaddr->cmd_addr + ATA_REG_CMD;
6385}
6386
Edward Falk0baab862005-06-02 18:17:13 -04006387
Jeff Garzik374b1872005-08-30 05:42:52 -04006388#ifdef CONFIG_PCI
6389
Edward Falk0baab862005-06-02 18:17:13 -04006390/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07006391 * ata_pci_remove_one - PCI layer callback for device removal
6392 * @pdev: PCI device that was removed
6393 *
Tejun Heob878ca52007-01-20 16:00:28 +09006394 * PCI layer indicates to libata via this hook that hot-unplug or
6395 * module unload event has occurred. Detach all ports. Resource
6396 * release is handled via devres.
Linus Torvalds1da177e2005-04-16 15:20:36 -07006397 *
6398 * LOCKING:
6399 * Inherited from PCI layer (may sleep).
6400 */
Tejun Heof0d36ef2007-01-20 16:00:28 +09006401void ata_pci_remove_one(struct pci_dev *pdev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07006402{
6403 struct device *dev = pci_dev_to_dev(pdev);
Jeff Garzikcca39742006-08-24 03:19:22 -04006404 struct ata_host *host = dev_get_drvdata(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006405
Tejun Heob878ca52007-01-20 16:00:28 +09006406 ata_host_detach(host);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006407}
6408
6409/* move to PCI subsystem */
Jeff Garzik057ace52005-10-22 14:27:05 -04006410int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits)
Linus Torvalds1da177e2005-04-16 15:20:36 -07006411{
6412 unsigned long tmp = 0;
6413
6414 switch (bits->width) {
6415 case 1: {
6416 u8 tmp8 = 0;
6417 pci_read_config_byte(pdev, bits->reg, &tmp8);
6418 tmp = tmp8;
6419 break;
6420 }
6421 case 2: {
6422 u16 tmp16 = 0;
6423 pci_read_config_word(pdev, bits->reg, &tmp16);
6424 tmp = tmp16;
6425 break;
6426 }
6427 case 4: {
6428 u32 tmp32 = 0;
6429 pci_read_config_dword(pdev, bits->reg, &tmp32);
6430 tmp = tmp32;
6431 break;
6432 }
6433
6434 default:
6435 return -EINVAL;
6436 }
6437
6438 tmp &= bits->mask;
6439
6440 return (tmp == bits->val) ? 1 : 0;
6441}
Jens Axboe9b847542006-01-06 09:28:07 +01006442
Tejun Heo6ffa01d2007-03-02 17:32:47 +09006443#ifdef CONFIG_PM
Tejun Heo3c5100c2006-07-26 16:58:33 +09006444void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg)
Jens Axboe9b847542006-01-06 09:28:07 +01006445{
6446 pci_save_state(pdev);
Tejun Heo4c90d972007-02-20 18:14:48 +09006447 pci_disable_device(pdev);
Tejun Heo500530f2006-07-03 16:07:27 +09006448
Tejun Heo4c90d972007-02-20 18:14:48 +09006449 if (mesg.event == PM_EVENT_SUSPEND)
Tejun Heo500530f2006-07-03 16:07:27 +09006450 pci_set_power_state(pdev, PCI_D3hot);
Jens Axboe9b847542006-01-06 09:28:07 +01006451}
6452
Tejun Heo553c4aa2006-12-26 19:39:50 +09006453int ata_pci_device_do_resume(struct pci_dev *pdev)
Jens Axboe9b847542006-01-06 09:28:07 +01006454{
Tejun Heo553c4aa2006-12-26 19:39:50 +09006455 int rc;
6456
Jens Axboe9b847542006-01-06 09:28:07 +01006457 pci_set_power_state(pdev, PCI_D0);
6458 pci_restore_state(pdev);
Tejun Heo553c4aa2006-12-26 19:39:50 +09006459
Tejun Heob878ca52007-01-20 16:00:28 +09006460 rc = pcim_enable_device(pdev);
Tejun Heo553c4aa2006-12-26 19:39:50 +09006461 if (rc) {
6462 dev_printk(KERN_ERR, &pdev->dev,
6463 "failed to enable device after resume (%d)\n", rc);
6464 return rc;
6465 }
6466
Jens Axboe9b847542006-01-06 09:28:07 +01006467 pci_set_master(pdev);
Tejun Heo553c4aa2006-12-26 19:39:50 +09006468 return 0;
Tejun Heo500530f2006-07-03 16:07:27 +09006469}
6470
Tejun Heo3c5100c2006-07-26 16:58:33 +09006471int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg)
Tejun Heo500530f2006-07-03 16:07:27 +09006472{
Jeff Garzikcca39742006-08-24 03:19:22 -04006473 struct ata_host *host = dev_get_drvdata(&pdev->dev);
Tejun Heo500530f2006-07-03 16:07:27 +09006474 int rc = 0;
6475
Jeff Garzikcca39742006-08-24 03:19:22 -04006476 rc = ata_host_suspend(host, mesg);
Tejun Heo500530f2006-07-03 16:07:27 +09006477 if (rc)
6478 return rc;
6479
Tejun Heo3c5100c2006-07-26 16:58:33 +09006480 ata_pci_device_do_suspend(pdev, mesg);
Tejun Heo500530f2006-07-03 16:07:27 +09006481
6482 return 0;
6483}
6484
6485int ata_pci_device_resume(struct pci_dev *pdev)
6486{
Jeff Garzikcca39742006-08-24 03:19:22 -04006487 struct ata_host *host = dev_get_drvdata(&pdev->dev);
Tejun Heo553c4aa2006-12-26 19:39:50 +09006488 int rc;
Tejun Heo500530f2006-07-03 16:07:27 +09006489
Tejun Heo553c4aa2006-12-26 19:39:50 +09006490 rc = ata_pci_device_do_resume(pdev);
6491 if (rc == 0)
6492 ata_host_resume(host);
6493 return rc;
Jens Axboe9b847542006-01-06 09:28:07 +01006494}
Tejun Heo6ffa01d2007-03-02 17:32:47 +09006495#endif /* CONFIG_PM */
6496
Linus Torvalds1da177e2005-04-16 15:20:36 -07006497#endif /* CONFIG_PCI */
6498
6499
Linus Torvalds1da177e2005-04-16 15:20:36 -07006500static int __init ata_init(void)
6501{
Andrew Mortona8601e52006-06-25 01:36:52 -07006502 ata_probe_timeout *= HZ;
Linus Torvalds1da177e2005-04-16 15:20:36 -07006503 ata_wq = create_workqueue("ata");
6504 if (!ata_wq)
6505 return -ENOMEM;
6506
Tejun Heo453b07a2006-05-31 18:27:42 +09006507 ata_aux_wq = create_singlethread_workqueue("ata_aux");
6508 if (!ata_aux_wq) {
6509 destroy_workqueue(ata_wq);
6510 return -ENOMEM;
6511 }
6512
Linus Torvalds1da177e2005-04-16 15:20:36 -07006513 printk(KERN_DEBUG "libata version " DRV_VERSION " loaded.\n");
6514 return 0;
6515}
6516
6517static void __exit ata_exit(void)
6518{
6519 destroy_workqueue(ata_wq);
Tejun Heo453b07a2006-05-31 18:27:42 +09006520 destroy_workqueue(ata_aux_wq);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006521}
6522
Brian Kinga4625082006-11-13 16:32:36 -06006523subsys_initcall(ata_init);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006524module_exit(ata_exit);
6525
Jeff Garzik67846b32005-10-05 02:58:32 -04006526static unsigned long ratelimit_time;
Ingo Molnar34af9462006-06-27 02:53:55 -07006527static DEFINE_SPINLOCK(ata_ratelimit_lock);
Jeff Garzik67846b32005-10-05 02:58:32 -04006528
6529int ata_ratelimit(void)
6530{
6531 int rc;
6532 unsigned long flags;
6533
6534 spin_lock_irqsave(&ata_ratelimit_lock, flags);
6535
6536 if (time_after(jiffies, ratelimit_time)) {
6537 rc = 1;
6538 ratelimit_time = jiffies + (HZ/5);
6539 } else
6540 rc = 0;
6541
6542 spin_unlock_irqrestore(&ata_ratelimit_lock, flags);
6543
6544 return rc;
6545}
6546
Tejun Heoc22daff2006-04-11 22:22:29 +09006547/**
6548 * ata_wait_register - wait until register value changes
6549 * @reg: IO-mapped register
6550 * @mask: Mask to apply to read register value
6551 * @val: Wait condition
6552 * @interval_msec: polling interval in milliseconds
6553 * @timeout_msec: timeout in milliseconds
6554 *
6555 * Waiting for some bits of register to change is a common
6556 * operation for ATA controllers. This function reads 32bit LE
6557 * IO-mapped register @reg and tests for the following condition.
6558 *
6559 * (*@reg & mask) != val
6560 *
6561 * If the condition is met, it returns; otherwise, the process is
6562 * repeated after @interval_msec until timeout.
6563 *
6564 * LOCKING:
6565 * Kernel thread context (may sleep)
6566 *
6567 * RETURNS:
6568 * The final register value.
6569 */
6570u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val,
6571 unsigned long interval_msec,
6572 unsigned long timeout_msec)
6573{
6574 unsigned long timeout;
6575 u32 tmp;
6576
6577 tmp = ioread32(reg);
6578
6579 /* Calculate timeout _after_ the first read to make sure
6580 * preceding writes reach the controller before starting to
6581 * eat away the timeout.
6582 */
6583 timeout = jiffies + (timeout_msec * HZ) / 1000;
6584
6585 while ((tmp & mask) == val && time_before(jiffies, timeout)) {
6586 msleep(interval_msec);
6587 tmp = ioread32(reg);
6588 }
6589
6590 return tmp;
6591}
6592
Linus Torvalds1da177e2005-04-16 15:20:36 -07006593/*
Tejun Heodd5b06c2006-08-10 16:59:12 +09006594 * Dummy port_ops
6595 */
6596static void ata_dummy_noret(struct ata_port *ap) { }
6597static int ata_dummy_ret0(struct ata_port *ap) { return 0; }
6598static void ata_dummy_qc_noret(struct ata_queued_cmd *qc) { }
6599
6600static u8 ata_dummy_check_status(struct ata_port *ap)
6601{
6602 return ATA_DRDY;
6603}
6604
6605static unsigned int ata_dummy_qc_issue(struct ata_queued_cmd *qc)
6606{
6607 return AC_ERR_SYSTEM;
6608}
6609
6610const struct ata_port_operations ata_dummy_port_ops = {
6611 .port_disable = ata_port_disable,
6612 .check_status = ata_dummy_check_status,
6613 .check_altstatus = ata_dummy_check_status,
6614 .dev_select = ata_noop_dev_select,
6615 .qc_prep = ata_noop_qc_prep,
6616 .qc_issue = ata_dummy_qc_issue,
6617 .freeze = ata_dummy_noret,
6618 .thaw = ata_dummy_noret,
6619 .error_handler = ata_dummy_noret,
6620 .post_internal_cmd = ata_dummy_qc_noret,
6621 .irq_clear = ata_dummy_noret,
6622 .port_start = ata_dummy_ret0,
6623 .port_stop = ata_dummy_noret,
6624};
6625
6626/*
Linus Torvalds1da177e2005-04-16 15:20:36 -07006627 * libata is essentially a library of internal helper functions for
6628 * low-level ATA host controller drivers. As such, the API/ABI is
6629 * likely to change as new drivers are added and updated.
6630 * Do not depend on ABI/API stability.
6631 */
6632
Tejun Heoe9c83912006-07-03 16:07:26 +09006633EXPORT_SYMBOL_GPL(sata_deb_timing_normal);
6634EXPORT_SYMBOL_GPL(sata_deb_timing_hotplug);
6635EXPORT_SYMBOL_GPL(sata_deb_timing_long);
Tejun Heodd5b06c2006-08-10 16:59:12 +09006636EXPORT_SYMBOL_GPL(ata_dummy_port_ops);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006637EXPORT_SYMBOL_GPL(ata_std_bios_param);
6638EXPORT_SYMBOL_GPL(ata_std_ports);
Jeff Garzikcca39742006-08-24 03:19:22 -04006639EXPORT_SYMBOL_GPL(ata_host_init);
Tejun Heof3187192007-04-17 23:44:07 +09006640EXPORT_SYMBOL_GPL(ata_host_alloc);
Tejun Heof5cda252007-04-17 23:44:07 +09006641EXPORT_SYMBOL_GPL(ata_host_alloc_pinfo);
Tejun Heoecef7252007-04-17 23:44:06 +09006642EXPORT_SYMBOL_GPL(ata_host_start);
Tejun Heof3187192007-04-17 23:44:07 +09006643EXPORT_SYMBOL_GPL(ata_host_register);
Tejun Heof5cda252007-04-17 23:44:07 +09006644EXPORT_SYMBOL_GPL(ata_host_activate);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006645EXPORT_SYMBOL_GPL(ata_device_add);
Tejun Heo0529c152007-01-20 16:00:26 +09006646EXPORT_SYMBOL_GPL(ata_host_detach);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006647EXPORT_SYMBOL_GPL(ata_sg_init);
6648EXPORT_SYMBOL_GPL(ata_sg_init_one);
Tejun Heo9a1004d2006-05-31 18:27:52 +09006649EXPORT_SYMBOL_GPL(ata_hsm_move);
Tejun Heof686bcb2006-05-15 20:58:05 +09006650EXPORT_SYMBOL_GPL(ata_qc_complete);
Tejun Heodedaf2b2006-05-15 21:03:43 +09006651EXPORT_SYMBOL_GPL(ata_qc_complete_multiple);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006652EXPORT_SYMBOL_GPL(ata_qc_issue_prot);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006653EXPORT_SYMBOL_GPL(ata_tf_load);
6654EXPORT_SYMBOL_GPL(ata_tf_read);
6655EXPORT_SYMBOL_GPL(ata_noop_dev_select);
6656EXPORT_SYMBOL_GPL(ata_std_dev_select);
Jeff Garzik43727fb2007-02-25 16:50:52 -05006657EXPORT_SYMBOL_GPL(sata_print_link_status);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006658EXPORT_SYMBOL_GPL(ata_tf_to_fis);
6659EXPORT_SYMBOL_GPL(ata_tf_from_fis);
6660EXPORT_SYMBOL_GPL(ata_check_status);
6661EXPORT_SYMBOL_GPL(ata_altstatus);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006662EXPORT_SYMBOL_GPL(ata_exec_command);
6663EXPORT_SYMBOL_GPL(ata_port_start);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006664EXPORT_SYMBOL_GPL(ata_interrupt);
Alan04351822007-03-06 02:37:52 -08006665EXPORT_SYMBOL_GPL(ata_do_set_mode);
Tejun Heo0d5ff562007-02-01 15:06:36 +09006666EXPORT_SYMBOL_GPL(ata_data_xfer);
6667EXPORT_SYMBOL_GPL(ata_data_xfer_noirq);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006668EXPORT_SYMBOL_GPL(ata_qc_prep);
Brian Kinge46834c2006-03-17 17:04:03 -06006669EXPORT_SYMBOL_GPL(ata_noop_qc_prep);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006670EXPORT_SYMBOL_GPL(ata_bmdma_setup);
6671EXPORT_SYMBOL_GPL(ata_bmdma_start);
6672EXPORT_SYMBOL_GPL(ata_bmdma_irq_clear);
6673EXPORT_SYMBOL_GPL(ata_bmdma_status);
6674EXPORT_SYMBOL_GPL(ata_bmdma_stop);
Tejun Heo6d97dbd2006-05-15 20:58:24 +09006675EXPORT_SYMBOL_GPL(ata_bmdma_freeze);
6676EXPORT_SYMBOL_GPL(ata_bmdma_thaw);
6677EXPORT_SYMBOL_GPL(ata_bmdma_drive_eh);
6678EXPORT_SYMBOL_GPL(ata_bmdma_error_handler);
6679EXPORT_SYMBOL_GPL(ata_bmdma_post_internal_cmd);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006680EXPORT_SYMBOL_GPL(ata_port_probe);
Alan10305f02007-02-20 18:01:59 +00006681EXPORT_SYMBOL_GPL(ata_dev_disable);
Tejun Heo3c567b72006-05-15 20:57:23 +09006682EXPORT_SYMBOL_GPL(sata_set_spd);
Tejun Heod7bb4cc2006-05-31 18:27:46 +09006683EXPORT_SYMBOL_GPL(sata_phy_debounce);
6684EXPORT_SYMBOL_GPL(sata_phy_resume);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006685EXPORT_SYMBOL_GPL(sata_phy_reset);
6686EXPORT_SYMBOL_GPL(__sata_phy_reset);
6687EXPORT_SYMBOL_GPL(ata_bus_reset);
Tejun Heof5914a42006-05-31 18:27:48 +09006688EXPORT_SYMBOL_GPL(ata_std_prereset);
Tejun Heoc2bd5802006-01-24 17:05:22 +09006689EXPORT_SYMBOL_GPL(ata_std_softreset);
Tejun Heob6103f62006-11-01 17:59:53 +09006690EXPORT_SYMBOL_GPL(sata_port_hardreset);
Tejun Heoc2bd5802006-01-24 17:05:22 +09006691EXPORT_SYMBOL_GPL(sata_std_hardreset);
6692EXPORT_SYMBOL_GPL(ata_std_postreset);
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05006693EXPORT_SYMBOL_GPL(ata_dev_classify);
6694EXPORT_SYMBOL_GPL(ata_dev_pair);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006695EXPORT_SYMBOL_GPL(ata_port_disable);
Jeff Garzik67846b32005-10-05 02:58:32 -04006696EXPORT_SYMBOL_GPL(ata_ratelimit);
Tejun Heoc22daff2006-04-11 22:22:29 +09006697EXPORT_SYMBOL_GPL(ata_wait_register);
Tejun Heo6f8b9952006-01-24 17:05:21 +09006698EXPORT_SYMBOL_GPL(ata_busy_sleep);
Tejun Heo86e45b62006-03-05 15:29:09 +09006699EXPORT_SYMBOL_GPL(ata_port_queue_task);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006700EXPORT_SYMBOL_GPL(ata_scsi_ioctl);
6701EXPORT_SYMBOL_GPL(ata_scsi_queuecmd);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006702EXPORT_SYMBOL_GPL(ata_scsi_slave_config);
Tejun Heo83c47bc2006-05-31 18:28:07 +09006703EXPORT_SYMBOL_GPL(ata_scsi_slave_destroy);
Tejun Heoa6e6ce82006-05-15 21:03:48 +09006704EXPORT_SYMBOL_GPL(ata_scsi_change_queue_depth);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006705EXPORT_SYMBOL_GPL(ata_host_intr);
Tejun Heo34bf2172006-05-15 20:57:46 +09006706EXPORT_SYMBOL_GPL(sata_scr_valid);
6707EXPORT_SYMBOL_GPL(sata_scr_read);
6708EXPORT_SYMBOL_GPL(sata_scr_write);
6709EXPORT_SYMBOL_GPL(sata_scr_write_flush);
6710EXPORT_SYMBOL_GPL(ata_port_online);
6711EXPORT_SYMBOL_GPL(ata_port_offline);
Tejun Heo6ffa01d2007-03-02 17:32:47 +09006712#ifdef CONFIG_PM
Jeff Garzikcca39742006-08-24 03:19:22 -04006713EXPORT_SYMBOL_GPL(ata_host_suspend);
6714EXPORT_SYMBOL_GPL(ata_host_resume);
Tejun Heo6ffa01d2007-03-02 17:32:47 +09006715#endif /* CONFIG_PM */
Tejun Heo6a62a042006-02-13 10:02:46 +09006716EXPORT_SYMBOL_GPL(ata_id_string);
6717EXPORT_SYMBOL_GPL(ata_id_c_string);
Alan10305f02007-02-20 18:01:59 +00006718EXPORT_SYMBOL_GPL(ata_id_to_dma_mode);
Alan Cox6919a0a2006-10-27 19:08:46 -07006719EXPORT_SYMBOL_GPL(ata_device_blacklisted);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006720EXPORT_SYMBOL_GPL(ata_scsi_simulate);
6721
Alan Cox1bc4ccf2006-01-09 17:18:14 +00006722EXPORT_SYMBOL_GPL(ata_pio_need_iordy);
Alan Cox452503f2005-10-21 19:01:32 -04006723EXPORT_SYMBOL_GPL(ata_timing_compute);
6724EXPORT_SYMBOL_GPL(ata_timing_merge);
6725
Linus Torvalds1da177e2005-04-16 15:20:36 -07006726#ifdef CONFIG_PCI
6727EXPORT_SYMBOL_GPL(pci_test_config_bits);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006728EXPORT_SYMBOL_GPL(ata_pci_init_native_mode);
6729EXPORT_SYMBOL_GPL(ata_pci_init_one);
6730EXPORT_SYMBOL_GPL(ata_pci_remove_one);
Tejun Heo6ffa01d2007-03-02 17:32:47 +09006731#ifdef CONFIG_PM
Tejun Heo500530f2006-07-03 16:07:27 +09006732EXPORT_SYMBOL_GPL(ata_pci_device_do_suspend);
6733EXPORT_SYMBOL_GPL(ata_pci_device_do_resume);
Jens Axboe9b847542006-01-06 09:28:07 +01006734EXPORT_SYMBOL_GPL(ata_pci_device_suspend);
6735EXPORT_SYMBOL_GPL(ata_pci_device_resume);
Tejun Heo6ffa01d2007-03-02 17:32:47 +09006736#endif /* CONFIG_PM */
Alan Cox67951ad2006-03-22 15:55:54 +00006737EXPORT_SYMBOL_GPL(ata_pci_default_filter);
6738EXPORT_SYMBOL_GPL(ata_pci_clear_simplex);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006739#endif /* CONFIG_PCI */
Jens Axboe9b847542006-01-06 09:28:07 +01006740
Tejun Heo6ffa01d2007-03-02 17:32:47 +09006741#ifdef CONFIG_PM
Jens Axboe9b847542006-01-06 09:28:07 +01006742EXPORT_SYMBOL_GPL(ata_scsi_device_suspend);
6743EXPORT_SYMBOL_GPL(ata_scsi_device_resume);
Tejun Heo6ffa01d2007-03-02 17:32:47 +09006744#endif /* CONFIG_PM */
Tejun Heoece1d632006-04-02 18:51:53 +09006745
Tejun Heoece1d632006-04-02 18:51:53 +09006746EXPORT_SYMBOL_GPL(ata_eng_timeout);
Tejun Heo7b70fc02006-05-15 20:58:07 +09006747EXPORT_SYMBOL_GPL(ata_port_schedule_eh);
6748EXPORT_SYMBOL_GPL(ata_port_abort);
Tejun Heoe3180492006-05-15 20:58:09 +09006749EXPORT_SYMBOL_GPL(ata_port_freeze);
6750EXPORT_SYMBOL_GPL(ata_eh_freeze_port);
6751EXPORT_SYMBOL_GPL(ata_eh_thaw_port);
Tejun Heoece1d632006-04-02 18:51:53 +09006752EXPORT_SYMBOL_GPL(ata_eh_qc_complete);
6753EXPORT_SYMBOL_GPL(ata_eh_qc_retry);
Tejun Heo022bdb02006-05-15 20:58:22 +09006754EXPORT_SYMBOL_GPL(ata_do_eh);
Akira Iguchi83625002007-01-26 16:27:32 +09006755EXPORT_SYMBOL_GPL(ata_irq_on);
6756EXPORT_SYMBOL_GPL(ata_dummy_irq_on);
6757EXPORT_SYMBOL_GPL(ata_irq_ack);
6758EXPORT_SYMBOL_GPL(ata_dummy_irq_ack);
Akira Iguchia619f981b2007-01-26 16:28:18 +09006759EXPORT_SYMBOL_GPL(ata_dev_try_classify);
Alan Coxbe0d18d2007-03-06 02:37:56 -08006760
6761EXPORT_SYMBOL_GPL(ata_cable_40wire);
6762EXPORT_SYMBOL_GPL(ata_cable_80wire);
6763EXPORT_SYMBOL_GPL(ata_cable_unknown);
6764EXPORT_SYMBOL_GPL(ata_cable_sata);