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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Jeff Garzikaf36d7f2005-08-28 20:18:39 -04002 * libata-core.c - helper library for ATA
3 *
4 * Maintained by: Jeff Garzik <jgarzik@pobox.com>
5 * Please ALWAYS copy linux-ide@vger.kernel.org
6 * on emails.
7 *
8 * Copyright 2003-2004 Red Hat, Inc. All rights reserved.
9 * Copyright 2003-2004 Jeff Garzik
10 *
11 *
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2, or (at your option)
15 * any later version.
16 *
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
21 *
22 * You should have received a copy of the GNU General Public License
23 * along with this program; see the file COPYING. If not, write to
24 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
25 *
26 *
27 * libata documentation is available via 'make {ps|pdf}docs',
28 * as Documentation/DocBook/libata.*
29 *
30 * Hardware documentation available from http://www.t13.org/ and
31 * http://www.sata-io.org/
32 *
Linus Torvalds1da177e2005-04-16 15:20:36 -070033 */
34
Linus Torvalds1da177e2005-04-16 15:20:36 -070035#include <linux/kernel.h>
36#include <linux/module.h>
37#include <linux/pci.h>
38#include <linux/init.h>
39#include <linux/list.h>
40#include <linux/mm.h>
41#include <linux/highmem.h>
42#include <linux/spinlock.h>
43#include <linux/blkdev.h>
44#include <linux/delay.h>
45#include <linux/timer.h>
46#include <linux/interrupt.h>
47#include <linux/completion.h>
48#include <linux/suspend.h>
49#include <linux/workqueue.h>
Jeff Garzik67846b32005-10-05 02:58:32 -040050#include <linux/jiffies.h>
David Hardeman378f0582005-09-17 17:55:31 +100051#include <linux/scatterlist.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070052#include <scsi/scsi.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070053#include "scsi_priv.h"
Jeff Garzik193515d2005-11-07 00:59:37 -050054#include <scsi/scsi_cmnd.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070055#include <scsi/scsi_host.h>
56#include <linux/libata.h>
57#include <asm/io.h>
58#include <asm/semaphore.h>
59#include <asm/byteorder.h>
60
61#include "libata.h"
62
Tejun Heod7bb4cc2006-05-31 18:27:46 +090063/* debounce timing parameters in msecs { interval, duration, timeout } */
Tejun Heoe9c83912006-07-03 16:07:26 +090064const unsigned long sata_deb_timing_normal[] = { 5, 100, 2000 };
65const unsigned long sata_deb_timing_hotplug[] = { 25, 500, 2000 };
66const unsigned long sata_deb_timing_long[] = { 100, 2000, 5000 };
Tejun Heod7bb4cc2006-05-31 18:27:46 +090067
Tejun Heo3373efd2006-05-15 20:57:53 +090068static unsigned int ata_dev_init_params(struct ata_device *dev,
69 u16 heads, u16 sectors);
70static unsigned int ata_dev_set_xfermode(struct ata_device *dev);
71static void ata_dev_xfermask(struct ata_device *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -070072
73static unsigned int ata_unique_id = 1;
74static struct workqueue_struct *ata_wq;
75
Tejun Heo453b07a2006-05-31 18:27:42 +090076struct workqueue_struct *ata_aux_wq;
77
Jeff Garzik418dc1f2006-03-11 20:50:08 -050078int atapi_enabled = 1;
Jeff Garzik1623c812005-08-30 03:37:42 -040079module_param(atapi_enabled, int, 0444);
80MODULE_PARM_DESC(atapi_enabled, "Enable discovery of ATAPI devices (0=off, 1=on)");
81
Albert Lee95de7192006-04-04 10:57:18 +080082int atapi_dmadir = 0;
83module_param(atapi_dmadir, int, 0444);
84MODULE_PARM_DESC(atapi_dmadir, "Enable ATAPI DMADIR bridge support (0=off, 1=on)");
85
Jeff Garzikc3c013a2006-02-27 22:31:19 -050086int libata_fua = 0;
87module_param_named(fua, libata_fua, int, 0444);
88MODULE_PARM_DESC(fua, "FUA support (0=off, 1=on)");
89
Andrew Mortona8601e52006-06-25 01:36:52 -070090static int ata_probe_timeout = ATA_TMOUT_INTERNAL / HZ;
91module_param(ata_probe_timeout, int, 0444);
92MODULE_PARM_DESC(ata_probe_timeout, "Set ATA probing timeout (seconds)");
93
Linus Torvalds1da177e2005-04-16 15:20:36 -070094MODULE_AUTHOR("Jeff Garzik");
95MODULE_DESCRIPTION("Library module for ATA devices");
96MODULE_LICENSE("GPL");
97MODULE_VERSION(DRV_VERSION);
98
Edward Falk0baab862005-06-02 18:17:13 -040099
100/**
Linus Torvalds1da177e2005-04-16 15:20:36 -0700101 * ata_tf_to_fis - Convert ATA taskfile to SATA FIS structure
102 * @tf: Taskfile to convert
103 * @fis: Buffer into which data will output
104 * @pmp: Port multiplier port
105 *
106 * Converts a standard ATA taskfile to a Serial ATA
107 * FIS structure (Register - Host to Device).
108 *
109 * LOCKING:
110 * Inherited from caller.
111 */
112
Jeff Garzik057ace52005-10-22 14:27:05 -0400113void ata_tf_to_fis(const struct ata_taskfile *tf, u8 *fis, u8 pmp)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700114{
115 fis[0] = 0x27; /* Register - Host to Device FIS */
116 fis[1] = (pmp & 0xf) | (1 << 7); /* Port multiplier number,
117 bit 7 indicates Command FIS */
118 fis[2] = tf->command;
119 fis[3] = tf->feature;
120
121 fis[4] = tf->lbal;
122 fis[5] = tf->lbam;
123 fis[6] = tf->lbah;
124 fis[7] = tf->device;
125
126 fis[8] = tf->hob_lbal;
127 fis[9] = tf->hob_lbam;
128 fis[10] = tf->hob_lbah;
129 fis[11] = tf->hob_feature;
130
131 fis[12] = tf->nsect;
132 fis[13] = tf->hob_nsect;
133 fis[14] = 0;
134 fis[15] = tf->ctl;
135
136 fis[16] = 0;
137 fis[17] = 0;
138 fis[18] = 0;
139 fis[19] = 0;
140}
141
142/**
143 * ata_tf_from_fis - Convert SATA FIS to ATA taskfile
144 * @fis: Buffer from which data will be input
145 * @tf: Taskfile to output
146 *
Mark Lorde12a1be2005-11-12 18:55:45 -0500147 * Converts a serial ATA FIS structure to a standard ATA taskfile.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700148 *
149 * LOCKING:
150 * Inherited from caller.
151 */
152
Jeff Garzik057ace52005-10-22 14:27:05 -0400153void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700154{
155 tf->command = fis[2]; /* status */
156 tf->feature = fis[3]; /* error */
157
158 tf->lbal = fis[4];
159 tf->lbam = fis[5];
160 tf->lbah = fis[6];
161 tf->device = fis[7];
162
163 tf->hob_lbal = fis[8];
164 tf->hob_lbam = fis[9];
165 tf->hob_lbah = fis[10];
166
167 tf->nsect = fis[12];
168 tf->hob_nsect = fis[13];
169}
170
Albert Lee8cbd6df2005-10-12 15:06:27 +0800171static const u8 ata_rw_cmds[] = {
172 /* pio multi */
173 ATA_CMD_READ_MULTI,
174 ATA_CMD_WRITE_MULTI,
175 ATA_CMD_READ_MULTI_EXT,
176 ATA_CMD_WRITE_MULTI_EXT,
Tejun Heo9a3dccc2006-01-06 09:56:18 +0100177 0,
178 0,
179 0,
180 ATA_CMD_WRITE_MULTI_FUA_EXT,
Albert Lee8cbd6df2005-10-12 15:06:27 +0800181 /* pio */
182 ATA_CMD_PIO_READ,
183 ATA_CMD_PIO_WRITE,
184 ATA_CMD_PIO_READ_EXT,
185 ATA_CMD_PIO_WRITE_EXT,
Tejun Heo9a3dccc2006-01-06 09:56:18 +0100186 0,
187 0,
188 0,
189 0,
Albert Lee8cbd6df2005-10-12 15:06:27 +0800190 /* dma */
191 ATA_CMD_READ,
192 ATA_CMD_WRITE,
193 ATA_CMD_READ_EXT,
Tejun Heo9a3dccc2006-01-06 09:56:18 +0100194 ATA_CMD_WRITE_EXT,
195 0,
196 0,
197 0,
198 ATA_CMD_WRITE_FUA_EXT
Albert Lee8cbd6df2005-10-12 15:06:27 +0800199};
Linus Torvalds1da177e2005-04-16 15:20:36 -0700200
201/**
Albert Lee8cbd6df2005-10-12 15:06:27 +0800202 * ata_rwcmd_protocol - set taskfile r/w commands and protocol
203 * @qc: command to examine and configure
Linus Torvalds1da177e2005-04-16 15:20:36 -0700204 *
Jeff Garzik2e9edbf2006-03-24 09:56:57 -0500205 * Examine the device configuration and tf->flags to calculate
Albert Lee8cbd6df2005-10-12 15:06:27 +0800206 * the proper read/write commands and protocol to use.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700207 *
208 * LOCKING:
209 * caller.
210 */
Tejun Heo9a3dccc2006-01-06 09:56:18 +0100211int ata_rwcmd_protocol(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700212{
Albert Lee8cbd6df2005-10-12 15:06:27 +0800213 struct ata_taskfile *tf = &qc->tf;
214 struct ata_device *dev = qc->dev;
Tejun Heo9a3dccc2006-01-06 09:56:18 +0100215 u8 cmd;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700216
Tejun Heo9a3dccc2006-01-06 09:56:18 +0100217 int index, fua, lba48, write;
Jeff Garzik2e9edbf2006-03-24 09:56:57 -0500218
Tejun Heo9a3dccc2006-01-06 09:56:18 +0100219 fua = (tf->flags & ATA_TFLAG_FUA) ? 4 : 0;
Albert Lee8cbd6df2005-10-12 15:06:27 +0800220 lba48 = (tf->flags & ATA_TFLAG_LBA48) ? 2 : 0;
221 write = (tf->flags & ATA_TFLAG_WRITE) ? 1 : 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700222
Albert Lee8cbd6df2005-10-12 15:06:27 +0800223 if (dev->flags & ATA_DFLAG_PIO) {
224 tf->protocol = ATA_PROT_PIO;
Tejun Heo9a3dccc2006-01-06 09:56:18 +0100225 index = dev->multi_count ? 0 : 8;
Alan Cox8d238e02006-01-17 20:50:31 +0000226 } else if (lba48 && (qc->ap->flags & ATA_FLAG_PIO_LBA48)) {
227 /* Unable to use DMA due to host limitation */
228 tf->protocol = ATA_PROT_PIO;
Albert Lee0565c262006-02-13 18:55:25 +0800229 index = dev->multi_count ? 0 : 8;
Albert Lee8cbd6df2005-10-12 15:06:27 +0800230 } else {
231 tf->protocol = ATA_PROT_DMA;
Tejun Heo9a3dccc2006-01-06 09:56:18 +0100232 index = 16;
Albert Lee8cbd6df2005-10-12 15:06:27 +0800233 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700234
Tejun Heo9a3dccc2006-01-06 09:56:18 +0100235 cmd = ata_rw_cmds[index + fua + lba48 + write];
236 if (cmd) {
237 tf->command = cmd;
238 return 0;
239 }
240 return -1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700241}
242
Tejun Heocb95d562006-03-06 04:31:56 +0900243/**
244 * ata_pack_xfermask - Pack pio, mwdma and udma masks into xfer_mask
245 * @pio_mask: pio_mask
246 * @mwdma_mask: mwdma_mask
247 * @udma_mask: udma_mask
248 *
249 * Pack @pio_mask, @mwdma_mask and @udma_mask into a single
250 * unsigned int xfer_mask.
251 *
252 * LOCKING:
253 * None.
254 *
255 * RETURNS:
256 * Packed xfer_mask.
257 */
258static unsigned int ata_pack_xfermask(unsigned int pio_mask,
259 unsigned int mwdma_mask,
260 unsigned int udma_mask)
261{
262 return ((pio_mask << ATA_SHIFT_PIO) & ATA_MASK_PIO) |
263 ((mwdma_mask << ATA_SHIFT_MWDMA) & ATA_MASK_MWDMA) |
264 ((udma_mask << ATA_SHIFT_UDMA) & ATA_MASK_UDMA);
265}
266
Tejun Heoc0489e42006-03-24 14:07:49 +0900267/**
268 * ata_unpack_xfermask - Unpack xfer_mask into pio, mwdma and udma masks
269 * @xfer_mask: xfer_mask to unpack
270 * @pio_mask: resulting pio_mask
271 * @mwdma_mask: resulting mwdma_mask
272 * @udma_mask: resulting udma_mask
273 *
274 * Unpack @xfer_mask into @pio_mask, @mwdma_mask and @udma_mask.
275 * Any NULL distination masks will be ignored.
276 */
277static void ata_unpack_xfermask(unsigned int xfer_mask,
278 unsigned int *pio_mask,
279 unsigned int *mwdma_mask,
280 unsigned int *udma_mask)
281{
282 if (pio_mask)
283 *pio_mask = (xfer_mask & ATA_MASK_PIO) >> ATA_SHIFT_PIO;
284 if (mwdma_mask)
285 *mwdma_mask = (xfer_mask & ATA_MASK_MWDMA) >> ATA_SHIFT_MWDMA;
286 if (udma_mask)
287 *udma_mask = (xfer_mask & ATA_MASK_UDMA) >> ATA_SHIFT_UDMA;
288}
289
Tejun Heocb95d562006-03-06 04:31:56 +0900290static const struct ata_xfer_ent {
Tejun Heobe9a50c82006-03-31 22:48:52 +0900291 int shift, bits;
Tejun Heocb95d562006-03-06 04:31:56 +0900292 u8 base;
293} ata_xfer_tbl[] = {
294 { ATA_SHIFT_PIO, ATA_BITS_PIO, XFER_PIO_0 },
295 { ATA_SHIFT_MWDMA, ATA_BITS_MWDMA, XFER_MW_DMA_0 },
296 { ATA_SHIFT_UDMA, ATA_BITS_UDMA, XFER_UDMA_0 },
297 { -1, },
298};
299
300/**
301 * ata_xfer_mask2mode - Find matching XFER_* for the given xfer_mask
302 * @xfer_mask: xfer_mask of interest
303 *
304 * Return matching XFER_* value for @xfer_mask. Only the highest
305 * bit of @xfer_mask is considered.
306 *
307 * LOCKING:
308 * None.
309 *
310 * RETURNS:
311 * Matching XFER_* value, 0 if no match found.
312 */
313static u8 ata_xfer_mask2mode(unsigned int xfer_mask)
314{
315 int highbit = fls(xfer_mask) - 1;
316 const struct ata_xfer_ent *ent;
317
318 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
319 if (highbit >= ent->shift && highbit < ent->shift + ent->bits)
320 return ent->base + highbit - ent->shift;
321 return 0;
322}
323
324/**
325 * ata_xfer_mode2mask - Find matching xfer_mask for XFER_*
326 * @xfer_mode: XFER_* of interest
327 *
328 * Return matching xfer_mask for @xfer_mode.
329 *
330 * LOCKING:
331 * None.
332 *
333 * RETURNS:
334 * Matching xfer_mask, 0 if no match found.
335 */
336static unsigned int ata_xfer_mode2mask(u8 xfer_mode)
337{
338 const struct ata_xfer_ent *ent;
339
340 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
341 if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits)
342 return 1 << (ent->shift + xfer_mode - ent->base);
343 return 0;
344}
345
346/**
347 * ata_xfer_mode2shift - Find matching xfer_shift for XFER_*
348 * @xfer_mode: XFER_* of interest
349 *
350 * Return matching xfer_shift for @xfer_mode.
351 *
352 * LOCKING:
353 * None.
354 *
355 * RETURNS:
356 * Matching xfer_shift, -1 if no match found.
357 */
358static int ata_xfer_mode2shift(unsigned int xfer_mode)
359{
360 const struct ata_xfer_ent *ent;
361
362 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
363 if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits)
364 return ent->shift;
365 return -1;
366}
367
Linus Torvalds1da177e2005-04-16 15:20:36 -0700368/**
Tejun Heo1da7b0d2006-03-06 04:31:56 +0900369 * ata_mode_string - convert xfer_mask to string
370 * @xfer_mask: mask of bits supported; only highest bit counts.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700371 *
372 * Determine string which represents the highest speed
Tejun Heo1da7b0d2006-03-06 04:31:56 +0900373 * (highest bit in @modemask).
Linus Torvalds1da177e2005-04-16 15:20:36 -0700374 *
375 * LOCKING:
376 * None.
377 *
378 * RETURNS:
379 * Constant C string representing highest speed listed in
Tejun Heo1da7b0d2006-03-06 04:31:56 +0900380 * @mode_mask, or the constant C string "<n/a>".
Linus Torvalds1da177e2005-04-16 15:20:36 -0700381 */
Tejun Heo1da7b0d2006-03-06 04:31:56 +0900382static const char *ata_mode_string(unsigned int xfer_mask)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700383{
Tejun Heo75f554b2006-03-06 04:31:57 +0900384 static const char * const xfer_mode_str[] = {
385 "PIO0",
386 "PIO1",
387 "PIO2",
388 "PIO3",
389 "PIO4",
390 "MWDMA0",
391 "MWDMA1",
392 "MWDMA2",
393 "UDMA/16",
394 "UDMA/25",
395 "UDMA/33",
396 "UDMA/44",
397 "UDMA/66",
398 "UDMA/100",
399 "UDMA/133",
400 "UDMA7",
401 };
Tejun Heo1da7b0d2006-03-06 04:31:56 +0900402 int highbit;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700403
Tejun Heo1da7b0d2006-03-06 04:31:56 +0900404 highbit = fls(xfer_mask) - 1;
405 if (highbit >= 0 && highbit < ARRAY_SIZE(xfer_mode_str))
406 return xfer_mode_str[highbit];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700407 return "<n/a>";
Linus Torvalds1da177e2005-04-16 15:20:36 -0700408}
409
Tejun Heo4c360c82006-04-01 01:38:17 +0900410static const char *sata_spd_string(unsigned int spd)
411{
412 static const char * const spd_str[] = {
413 "1.5 Gbps",
414 "3.0 Gbps",
415 };
416
417 if (spd == 0 || (spd - 1) >= ARRAY_SIZE(spd_str))
418 return "<unknown>";
419 return spd_str[spd - 1];
420}
421
Tejun Heo3373efd2006-05-15 20:57:53 +0900422void ata_dev_disable(struct ata_device *dev)
Tejun Heo0b8efb02006-03-24 15:25:31 +0900423{
Borislav Petkov0dd4b212006-06-23 02:29:08 -0400424 if (ata_dev_enabled(dev) && ata_msg_drv(dev->ap)) {
Tejun Heof15a1da2006-05-15 20:57:56 +0900425 ata_dev_printk(dev, KERN_WARNING, "disabled\n");
Tejun Heo0b8efb02006-03-24 15:25:31 +0900426 dev->class++;
427 }
428}
429
Linus Torvalds1da177e2005-04-16 15:20:36 -0700430/**
431 * ata_pio_devchk - PATA device presence detection
432 * @ap: ATA channel to examine
433 * @device: Device to examine (starting at zero)
434 *
435 * This technique was originally described in
436 * Hale Landis's ATADRVR (www.ata-atapi.com), and
437 * later found its way into the ATA/ATAPI spec.
438 *
439 * Write a pattern to the ATA shadow registers,
440 * and if a device is present, it will respond by
441 * correctly storing and echoing back the
442 * ATA shadow register contents.
443 *
444 * LOCKING:
445 * caller.
446 */
447
448static unsigned int ata_pio_devchk(struct ata_port *ap,
449 unsigned int device)
450{
451 struct ata_ioports *ioaddr = &ap->ioaddr;
452 u8 nsect, lbal;
453
454 ap->ops->dev_select(ap, device);
455
456 outb(0x55, ioaddr->nsect_addr);
457 outb(0xaa, ioaddr->lbal_addr);
458
459 outb(0xaa, ioaddr->nsect_addr);
460 outb(0x55, ioaddr->lbal_addr);
461
462 outb(0x55, ioaddr->nsect_addr);
463 outb(0xaa, ioaddr->lbal_addr);
464
465 nsect = inb(ioaddr->nsect_addr);
466 lbal = inb(ioaddr->lbal_addr);
467
468 if ((nsect == 0x55) && (lbal == 0xaa))
469 return 1; /* we found a device */
470
471 return 0; /* nothing found */
472}
473
474/**
475 * ata_mmio_devchk - PATA device presence detection
476 * @ap: ATA channel to examine
477 * @device: Device to examine (starting at zero)
478 *
479 * This technique was originally described in
480 * Hale Landis's ATADRVR (www.ata-atapi.com), and
481 * later found its way into the ATA/ATAPI spec.
482 *
483 * Write a pattern to the ATA shadow registers,
484 * and if a device is present, it will respond by
485 * correctly storing and echoing back the
486 * ATA shadow register contents.
487 *
488 * LOCKING:
489 * caller.
490 */
491
492static unsigned int ata_mmio_devchk(struct ata_port *ap,
493 unsigned int device)
494{
495 struct ata_ioports *ioaddr = &ap->ioaddr;
496 u8 nsect, lbal;
497
498 ap->ops->dev_select(ap, device);
499
500 writeb(0x55, (void __iomem *) ioaddr->nsect_addr);
501 writeb(0xaa, (void __iomem *) ioaddr->lbal_addr);
502
503 writeb(0xaa, (void __iomem *) ioaddr->nsect_addr);
504 writeb(0x55, (void __iomem *) ioaddr->lbal_addr);
505
506 writeb(0x55, (void __iomem *) ioaddr->nsect_addr);
507 writeb(0xaa, (void __iomem *) ioaddr->lbal_addr);
508
509 nsect = readb((void __iomem *) ioaddr->nsect_addr);
510 lbal = readb((void __iomem *) ioaddr->lbal_addr);
511
512 if ((nsect == 0x55) && (lbal == 0xaa))
513 return 1; /* we found a device */
514
515 return 0; /* nothing found */
516}
517
518/**
519 * ata_devchk - PATA device presence detection
520 * @ap: ATA channel to examine
521 * @device: Device to examine (starting at zero)
522 *
523 * Dispatch ATA device presence detection, depending
524 * on whether we are using PIO or MMIO to talk to the
525 * ATA shadow registers.
526 *
527 * LOCKING:
528 * caller.
529 */
530
531static unsigned int ata_devchk(struct ata_port *ap,
532 unsigned int device)
533{
534 if (ap->flags & ATA_FLAG_MMIO)
535 return ata_mmio_devchk(ap, device);
536 return ata_pio_devchk(ap, device);
537}
538
539/**
540 * ata_dev_classify - determine device type based on ATA-spec signature
541 * @tf: ATA taskfile register set for device to be identified
542 *
543 * Determine from taskfile register contents whether a device is
544 * ATA or ATAPI, as per "Signature and persistence" section
545 * of ATA/PI spec (volume 1, sect 5.14).
546 *
547 * LOCKING:
548 * None.
549 *
550 * RETURNS:
551 * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, or %ATA_DEV_UNKNOWN
552 * the event of failure.
553 */
554
Jeff Garzik057ace52005-10-22 14:27:05 -0400555unsigned int ata_dev_classify(const struct ata_taskfile *tf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700556{
557 /* Apple's open source Darwin code hints that some devices only
558 * put a proper signature into the LBA mid/high registers,
559 * So, we only check those. It's sufficient for uniqueness.
560 */
561
562 if (((tf->lbam == 0) && (tf->lbah == 0)) ||
563 ((tf->lbam == 0x3c) && (tf->lbah == 0xc3))) {
564 DPRINTK("found ATA device by sig\n");
565 return ATA_DEV_ATA;
566 }
567
568 if (((tf->lbam == 0x14) && (tf->lbah == 0xeb)) ||
569 ((tf->lbam == 0x69) && (tf->lbah == 0x96))) {
570 DPRINTK("found ATAPI device by sig\n");
571 return ATA_DEV_ATAPI;
572 }
573
574 DPRINTK("unknown device\n");
575 return ATA_DEV_UNKNOWN;
576}
577
578/**
579 * ata_dev_try_classify - Parse returned ATA device signature
580 * @ap: ATA channel to examine
581 * @device: Device to examine (starting at zero)
Tejun Heob4dc7622006-01-24 17:05:22 +0900582 * @r_err: Value of error register on completion
Linus Torvalds1da177e2005-04-16 15:20:36 -0700583 *
584 * After an event -- SRST, E.D.D., or SATA COMRESET -- occurs,
585 * an ATA/ATAPI-defined set of values is placed in the ATA
586 * shadow registers, indicating the results of device detection
587 * and diagnostics.
588 *
589 * Select the ATA device, and read the values from the ATA shadow
590 * registers. Then parse according to the Error register value,
591 * and the spec-defined values examined by ata_dev_classify().
592 *
593 * LOCKING:
594 * caller.
Tejun Heob4dc7622006-01-24 17:05:22 +0900595 *
596 * RETURNS:
597 * Device type - %ATA_DEV_ATA, %ATA_DEV_ATAPI or %ATA_DEV_NONE.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700598 */
599
Tejun Heob4dc7622006-01-24 17:05:22 +0900600static unsigned int
601ata_dev_try_classify(struct ata_port *ap, unsigned int device, u8 *r_err)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700602{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700603 struct ata_taskfile tf;
604 unsigned int class;
605 u8 err;
606
607 ap->ops->dev_select(ap, device);
608
609 memset(&tf, 0, sizeof(tf));
610
Linus Torvalds1da177e2005-04-16 15:20:36 -0700611 ap->ops->tf_read(ap, &tf);
Jeff Garzik0169e282005-10-29 21:25:10 -0400612 err = tf.feature;
Tejun Heob4dc7622006-01-24 17:05:22 +0900613 if (r_err)
614 *r_err = err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700615
616 /* see if device passed diags */
617 if (err == 1)
618 /* do nothing */ ;
619 else if ((device == 0) && (err == 0x81))
620 /* do nothing */ ;
621 else
Tejun Heob4dc7622006-01-24 17:05:22 +0900622 return ATA_DEV_NONE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700623
Tejun Heob4dc7622006-01-24 17:05:22 +0900624 /* determine if device is ATA or ATAPI */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700625 class = ata_dev_classify(&tf);
Tejun Heob4dc7622006-01-24 17:05:22 +0900626
Linus Torvalds1da177e2005-04-16 15:20:36 -0700627 if (class == ATA_DEV_UNKNOWN)
Tejun Heob4dc7622006-01-24 17:05:22 +0900628 return ATA_DEV_NONE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700629 if ((class == ATA_DEV_ATA) && (ata_chk_status(ap) == 0))
Tejun Heob4dc7622006-01-24 17:05:22 +0900630 return ATA_DEV_NONE;
631 return class;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700632}
633
634/**
Tejun Heo6a62a042006-02-13 10:02:46 +0900635 * ata_id_string - Convert IDENTIFY DEVICE page into string
Linus Torvalds1da177e2005-04-16 15:20:36 -0700636 * @id: IDENTIFY DEVICE results we will examine
637 * @s: string into which data is output
638 * @ofs: offset into identify device page
639 * @len: length of string to return. must be an even number.
640 *
641 * The strings in the IDENTIFY DEVICE page are broken up into
642 * 16-bit chunks. Run through the string, and output each
643 * 8-bit chunk linearly, regardless of platform.
644 *
645 * LOCKING:
646 * caller.
647 */
648
Tejun Heo6a62a042006-02-13 10:02:46 +0900649void ata_id_string(const u16 *id, unsigned char *s,
650 unsigned int ofs, unsigned int len)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700651{
652 unsigned int c;
653
654 while (len > 0) {
655 c = id[ofs] >> 8;
656 *s = c;
657 s++;
658
659 c = id[ofs] & 0xff;
660 *s = c;
661 s++;
662
663 ofs++;
664 len -= 2;
665 }
666}
667
Tejun Heo0e949ff2006-02-12 22:47:04 +0900668/**
Tejun Heo6a62a042006-02-13 10:02:46 +0900669 * ata_id_c_string - Convert IDENTIFY DEVICE page into C string
Tejun Heo0e949ff2006-02-12 22:47:04 +0900670 * @id: IDENTIFY DEVICE results we will examine
671 * @s: string into which data is output
672 * @ofs: offset into identify device page
673 * @len: length of string to return. must be an odd number.
674 *
Tejun Heo6a62a042006-02-13 10:02:46 +0900675 * This function is identical to ata_id_string except that it
Tejun Heo0e949ff2006-02-12 22:47:04 +0900676 * trims trailing spaces and terminates the resulting string with
677 * null. @len must be actual maximum length (even number) + 1.
678 *
679 * LOCKING:
680 * caller.
681 */
Tejun Heo6a62a042006-02-13 10:02:46 +0900682void ata_id_c_string(const u16 *id, unsigned char *s,
683 unsigned int ofs, unsigned int len)
Tejun Heo0e949ff2006-02-12 22:47:04 +0900684{
685 unsigned char *p;
686
687 WARN_ON(!(len & 1));
688
Tejun Heo6a62a042006-02-13 10:02:46 +0900689 ata_id_string(id, s, ofs, len - 1);
Tejun Heo0e949ff2006-02-12 22:47:04 +0900690
691 p = s + strnlen(s, len - 1);
692 while (p > s && p[-1] == ' ')
693 p--;
694 *p = '\0';
695}
Edward Falk0baab862005-06-02 18:17:13 -0400696
Tejun Heo29407402006-02-12 22:47:04 +0900697static u64 ata_id_n_sectors(const u16 *id)
698{
699 if (ata_id_has_lba(id)) {
700 if (ata_id_has_lba48(id))
701 return ata_id_u64(id, 100);
702 else
703 return ata_id_u32(id, 60);
704 } else {
705 if (ata_id_current_chs_valid(id))
706 return ata_id_u32(id, 57);
707 else
708 return id[1] * id[3] * id[6];
709 }
710}
711
Edward Falk0baab862005-06-02 18:17:13 -0400712/**
713 * ata_noop_dev_select - Select device 0/1 on ATA bus
714 * @ap: ATA channel to manipulate
715 * @device: ATA device (numbered from zero) to select
716 *
717 * This function performs no actual function.
718 *
719 * May be used as the dev_select() entry in ata_port_operations.
720 *
721 * LOCKING:
722 * caller.
723 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700724void ata_noop_dev_select (struct ata_port *ap, unsigned int device)
725{
726}
727
Edward Falk0baab862005-06-02 18:17:13 -0400728
Linus Torvalds1da177e2005-04-16 15:20:36 -0700729/**
730 * ata_std_dev_select - Select device 0/1 on ATA bus
731 * @ap: ATA channel to manipulate
732 * @device: ATA device (numbered from zero) to select
733 *
734 * Use the method defined in the ATA specification to
735 * make either device 0, or device 1, active on the
Edward Falk0baab862005-06-02 18:17:13 -0400736 * ATA channel. Works with both PIO and MMIO.
737 *
738 * May be used as the dev_select() entry in ata_port_operations.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700739 *
740 * LOCKING:
741 * caller.
742 */
743
744void ata_std_dev_select (struct ata_port *ap, unsigned int device)
745{
746 u8 tmp;
747
748 if (device == 0)
749 tmp = ATA_DEVICE_OBS;
750 else
751 tmp = ATA_DEVICE_OBS | ATA_DEV1;
752
753 if (ap->flags & ATA_FLAG_MMIO) {
754 writeb(tmp, (void __iomem *) ap->ioaddr.device_addr);
755 } else {
756 outb(tmp, ap->ioaddr.device_addr);
757 }
758 ata_pause(ap); /* needed; also flushes, for mmio */
759}
760
761/**
762 * ata_dev_select - Select device 0/1 on ATA bus
763 * @ap: ATA channel to manipulate
764 * @device: ATA device (numbered from zero) to select
765 * @wait: non-zero to wait for Status register BSY bit to clear
766 * @can_sleep: non-zero if context allows sleeping
767 *
768 * Use the method defined in the ATA specification to
769 * make either device 0, or device 1, active on the
770 * ATA channel.
771 *
772 * This is a high-level version of ata_std_dev_select(),
773 * which additionally provides the services of inserting
774 * the proper pauses and status polling, where needed.
775 *
776 * LOCKING:
777 * caller.
778 */
779
780void ata_dev_select(struct ata_port *ap, unsigned int device,
781 unsigned int wait, unsigned int can_sleep)
782{
Tejun Heo88574552006-06-25 20:00:35 +0900783 if (ata_msg_probe(ap))
Borislav Petkov0dd4b212006-06-23 02:29:08 -0400784 ata_port_printk(ap, KERN_INFO, "ata_dev_select: ENTER, ata%u: "
Tejun Heo88574552006-06-25 20:00:35 +0900785 "device %u, wait %u\n", ap->id, device, wait);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700786
787 if (wait)
788 ata_wait_idle(ap);
789
790 ap->ops->dev_select(ap, device);
791
792 if (wait) {
793 if (can_sleep && ap->device[device].class == ATA_DEV_ATAPI)
794 msleep(150);
795 ata_wait_idle(ap);
796 }
797}
798
799/**
800 * ata_dump_id - IDENTIFY DEVICE info debugging output
Tejun Heo0bd33002006-02-12 22:47:05 +0900801 * @id: IDENTIFY DEVICE page to dump
Linus Torvalds1da177e2005-04-16 15:20:36 -0700802 *
Tejun Heo0bd33002006-02-12 22:47:05 +0900803 * Dump selected 16-bit words from the given IDENTIFY DEVICE
804 * page.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700805 *
806 * LOCKING:
807 * caller.
808 */
809
Tejun Heo0bd33002006-02-12 22:47:05 +0900810static inline void ata_dump_id(const u16 *id)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700811{
812 DPRINTK("49==0x%04x "
813 "53==0x%04x "
814 "63==0x%04x "
815 "64==0x%04x "
816 "75==0x%04x \n",
Tejun Heo0bd33002006-02-12 22:47:05 +0900817 id[49],
818 id[53],
819 id[63],
820 id[64],
821 id[75]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700822 DPRINTK("80==0x%04x "
823 "81==0x%04x "
824 "82==0x%04x "
825 "83==0x%04x "
826 "84==0x%04x \n",
Tejun Heo0bd33002006-02-12 22:47:05 +0900827 id[80],
828 id[81],
829 id[82],
830 id[83],
831 id[84]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700832 DPRINTK("88==0x%04x "
833 "93==0x%04x\n",
Tejun Heo0bd33002006-02-12 22:47:05 +0900834 id[88],
835 id[93]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700836}
837
Tejun Heocb95d562006-03-06 04:31:56 +0900838/**
839 * ata_id_xfermask - Compute xfermask from the given IDENTIFY data
840 * @id: IDENTIFY data to compute xfer mask from
841 *
842 * Compute the xfermask for this device. This is not as trivial
843 * as it seems if we must consider early devices correctly.
844 *
845 * FIXME: pre IDE drive timing (do we care ?).
846 *
847 * LOCKING:
848 * None.
849 *
850 * RETURNS:
851 * Computed xfermask
852 */
853static unsigned int ata_id_xfermask(const u16 *id)
854{
855 unsigned int pio_mask, mwdma_mask, udma_mask;
856
857 /* Usual case. Word 53 indicates word 64 is valid */
858 if (id[ATA_ID_FIELD_VALID] & (1 << 1)) {
859 pio_mask = id[ATA_ID_PIO_MODES] & 0x03;
860 pio_mask <<= 3;
861 pio_mask |= 0x7;
862 } else {
863 /* If word 64 isn't valid then Word 51 high byte holds
864 * the PIO timing number for the maximum. Turn it into
865 * a mask.
866 */
867 pio_mask = (2 << (id[ATA_ID_OLD_PIO_MODES] & 0xFF)) - 1 ;
868
869 /* But wait.. there's more. Design your standards by
870 * committee and you too can get a free iordy field to
871 * process. However its the speeds not the modes that
872 * are supported... Note drivers using the timing API
873 * will get this right anyway
874 */
875 }
876
877 mwdma_mask = id[ATA_ID_MWDMA_MODES] & 0x07;
Tejun Heofb21f0d2006-03-12 12:34:35 +0900878
879 udma_mask = 0;
880 if (id[ATA_ID_FIELD_VALID] & (1 << 2))
881 udma_mask = id[ATA_ID_UDMA_MODES] & 0xff;
Tejun Heocb95d562006-03-06 04:31:56 +0900882
883 return ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask);
884}
885
Tejun Heo86e45b62006-03-05 15:29:09 +0900886/**
887 * ata_port_queue_task - Queue port_task
888 * @ap: The ata_port to queue port_task for
Randy Dunlape2a7f772006-05-18 10:50:18 -0700889 * @fn: workqueue function to be scheduled
890 * @data: data value to pass to workqueue function
891 * @delay: delay time for workqueue function
Tejun Heo86e45b62006-03-05 15:29:09 +0900892 *
893 * Schedule @fn(@data) for execution after @delay jiffies using
894 * port_task. There is one port_task per port and it's the
895 * user(low level driver)'s responsibility to make sure that only
896 * one task is active at any given time.
897 *
898 * libata core layer takes care of synchronization between
899 * port_task and EH. ata_port_queue_task() may be ignored for EH
900 * synchronization.
901 *
902 * LOCKING:
903 * Inherited from caller.
904 */
905void ata_port_queue_task(struct ata_port *ap, void (*fn)(void *), void *data,
906 unsigned long delay)
907{
908 int rc;
909
Tejun Heob51e9e52006-06-29 01:29:30 +0900910 if (ap->pflags & ATA_PFLAG_FLUSH_PORT_TASK)
Tejun Heo86e45b62006-03-05 15:29:09 +0900911 return;
912
913 PREPARE_WORK(&ap->port_task, fn, data);
914
915 if (!delay)
916 rc = queue_work(ata_wq, &ap->port_task);
917 else
918 rc = queue_delayed_work(ata_wq, &ap->port_task, delay);
919
920 /* rc == 0 means that another user is using port task */
921 WARN_ON(rc == 0);
922}
923
924/**
925 * ata_port_flush_task - Flush port_task
926 * @ap: The ata_port to flush port_task for
927 *
928 * After this function completes, port_task is guranteed not to
929 * be running or scheduled.
930 *
931 * LOCKING:
932 * Kernel thread context (may sleep)
933 */
934void ata_port_flush_task(struct ata_port *ap)
935{
936 unsigned long flags;
937
938 DPRINTK("ENTER\n");
939
Jeff Garzikba6a1302006-06-22 23:46:10 -0400940 spin_lock_irqsave(ap->lock, flags);
Tejun Heob51e9e52006-06-29 01:29:30 +0900941 ap->pflags |= ATA_PFLAG_FLUSH_PORT_TASK;
Jeff Garzikba6a1302006-06-22 23:46:10 -0400942 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heo86e45b62006-03-05 15:29:09 +0900943
944 DPRINTK("flush #1\n");
945 flush_workqueue(ata_wq);
946
947 /*
948 * At this point, if a task is running, it's guaranteed to see
949 * the FLUSH flag; thus, it will never queue pio tasks again.
950 * Cancel and flush.
951 */
952 if (!cancel_delayed_work(&ap->port_task)) {
Borislav Petkov0dd4b212006-06-23 02:29:08 -0400953 if (ata_msg_ctl(ap))
Tejun Heo88574552006-06-25 20:00:35 +0900954 ata_port_printk(ap, KERN_DEBUG, "%s: flush #2\n",
955 __FUNCTION__);
Tejun Heo86e45b62006-03-05 15:29:09 +0900956 flush_workqueue(ata_wq);
957 }
958
Jeff Garzikba6a1302006-06-22 23:46:10 -0400959 spin_lock_irqsave(ap->lock, flags);
Tejun Heob51e9e52006-06-29 01:29:30 +0900960 ap->pflags &= ~ATA_PFLAG_FLUSH_PORT_TASK;
Jeff Garzikba6a1302006-06-22 23:46:10 -0400961 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heo86e45b62006-03-05 15:29:09 +0900962
Borislav Petkov0dd4b212006-06-23 02:29:08 -0400963 if (ata_msg_ctl(ap))
964 ata_port_printk(ap, KERN_DEBUG, "%s: EXIT\n", __FUNCTION__);
Tejun Heo86e45b62006-03-05 15:29:09 +0900965}
966
Tejun Heo77853bf2006-01-23 13:09:36 +0900967void ata_qc_complete_internal(struct ata_queued_cmd *qc)
Tejun Heoa2a7a662005-12-13 14:48:31 +0900968{
Tejun Heo77853bf2006-01-23 13:09:36 +0900969 struct completion *waiting = qc->private_data;
Tejun Heoa2a7a662005-12-13 14:48:31 +0900970
Tejun Heoa2a7a662005-12-13 14:48:31 +0900971 complete(waiting);
Tejun Heoa2a7a662005-12-13 14:48:31 +0900972}
973
974/**
975 * ata_exec_internal - execute libata internal command
Tejun Heoa2a7a662005-12-13 14:48:31 +0900976 * @dev: Device to which the command is sent
977 * @tf: Taskfile registers for the command and the result
Tejun Heod69cf372006-04-02 18:51:53 +0900978 * @cdb: CDB for packet command
Tejun Heoa2a7a662005-12-13 14:48:31 +0900979 * @dma_dir: Data tranfer direction of the command
980 * @buf: Data buffer of the command
981 * @buflen: Length of data buffer
982 *
983 * Executes libata internal command with timeout. @tf contains
984 * command on entry and result on return. Timeout and error
985 * conditions are reported via return value. No recovery action
986 * is taken after a command times out. It's caller's duty to
987 * clean up after timeout.
988 *
989 * LOCKING:
990 * None. Should be called with kernel context, might sleep.
Tejun Heo551e8882006-06-12 14:09:49 +0900991 *
992 * RETURNS:
993 * Zero on success, AC_ERR_* mask on failure
Tejun Heoa2a7a662005-12-13 14:48:31 +0900994 */
Tejun Heo3373efd2006-05-15 20:57:53 +0900995unsigned ata_exec_internal(struct ata_device *dev,
Tejun Heo1ad8e7f2006-04-02 18:51:53 +0900996 struct ata_taskfile *tf, const u8 *cdb,
997 int dma_dir, void *buf, unsigned int buflen)
Tejun Heoa2a7a662005-12-13 14:48:31 +0900998{
Tejun Heo3373efd2006-05-15 20:57:53 +0900999 struct ata_port *ap = dev->ap;
Tejun Heoa2a7a662005-12-13 14:48:31 +09001000 u8 command = tf->command;
1001 struct ata_queued_cmd *qc;
Tejun Heo2ab7db12006-05-15 20:58:02 +09001002 unsigned int tag, preempted_tag;
Tejun Heodedaf2b2006-05-15 21:03:43 +09001003 u32 preempted_sactive, preempted_qc_active;
Ingo Molnar60be6b92006-07-03 00:25:26 -07001004 DECLARE_COMPLETION_ONSTACK(wait);
Tejun Heoa2a7a662005-12-13 14:48:31 +09001005 unsigned long flags;
Tejun Heo77853bf2006-01-23 13:09:36 +09001006 unsigned int err_mask;
Tejun Heod95a7172006-05-15 20:58:14 +09001007 int rc;
Tejun Heoa2a7a662005-12-13 14:48:31 +09001008
Jeff Garzikba6a1302006-06-22 23:46:10 -04001009 spin_lock_irqsave(ap->lock, flags);
Tejun Heoa2a7a662005-12-13 14:48:31 +09001010
Tejun Heoe3180492006-05-15 20:58:09 +09001011 /* no internal command while frozen */
Tejun Heob51e9e52006-06-29 01:29:30 +09001012 if (ap->pflags & ATA_PFLAG_FROZEN) {
Jeff Garzikba6a1302006-06-22 23:46:10 -04001013 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heoe3180492006-05-15 20:58:09 +09001014 return AC_ERR_SYSTEM;
1015 }
1016
Tejun Heo2ab7db12006-05-15 20:58:02 +09001017 /* initialize internal qc */
Tejun Heoa2a7a662005-12-13 14:48:31 +09001018
Tejun Heo2ab7db12006-05-15 20:58:02 +09001019 /* XXX: Tag 0 is used for drivers with legacy EH as some
1020 * drivers choke if any other tag is given. This breaks
1021 * ata_tag_internal() test for those drivers. Don't use new
1022 * EH stuff without converting to it.
1023 */
1024 if (ap->ops->error_handler)
1025 tag = ATA_TAG_INTERNAL;
1026 else
1027 tag = 0;
1028
Tejun Heo6cec4a32006-05-15 21:03:41 +09001029 if (test_and_set_bit(tag, &ap->qc_allocated))
Tejun Heo2ab7db12006-05-15 20:58:02 +09001030 BUG();
Tejun Heof69499f2006-05-15 20:58:03 +09001031 qc = __ata_qc_from_tag(ap, tag);
Tejun Heo2ab7db12006-05-15 20:58:02 +09001032
1033 qc->tag = tag;
1034 qc->scsicmd = NULL;
1035 qc->ap = ap;
1036 qc->dev = dev;
1037 ata_qc_reinit(qc);
1038
1039 preempted_tag = ap->active_tag;
Tejun Heodedaf2b2006-05-15 21:03:43 +09001040 preempted_sactive = ap->sactive;
1041 preempted_qc_active = ap->qc_active;
Tejun Heo2ab7db12006-05-15 20:58:02 +09001042 ap->active_tag = ATA_TAG_POISON;
Tejun Heodedaf2b2006-05-15 21:03:43 +09001043 ap->sactive = 0;
1044 ap->qc_active = 0;
Tejun Heo2ab7db12006-05-15 20:58:02 +09001045
1046 /* prepare & issue qc */
Tejun Heoa2a7a662005-12-13 14:48:31 +09001047 qc->tf = *tf;
Tejun Heod69cf372006-04-02 18:51:53 +09001048 if (cdb)
1049 memcpy(qc->cdb, cdb, ATAPI_CDB_LEN);
Tejun Heoe61e0672006-05-15 20:57:40 +09001050 qc->flags |= ATA_QCFLAG_RESULT_TF;
Tejun Heoa2a7a662005-12-13 14:48:31 +09001051 qc->dma_dir = dma_dir;
1052 if (dma_dir != DMA_NONE) {
1053 ata_sg_init_one(qc, buf, buflen);
1054 qc->nsect = buflen / ATA_SECT_SIZE;
1055 }
1056
Tejun Heo77853bf2006-01-23 13:09:36 +09001057 qc->private_data = &wait;
Tejun Heoa2a7a662005-12-13 14:48:31 +09001058 qc->complete_fn = ata_qc_complete_internal;
1059
Tejun Heo8e0e6942006-03-31 20:41:11 +09001060 ata_qc_issue(qc);
Tejun Heoa2a7a662005-12-13 14:48:31 +09001061
Jeff Garzikba6a1302006-06-22 23:46:10 -04001062 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heoa2a7a662005-12-13 14:48:31 +09001063
Andrew Mortona8601e52006-06-25 01:36:52 -07001064 rc = wait_for_completion_timeout(&wait, ata_probe_timeout);
Albert Lee41ade502006-03-14 11:19:04 +08001065
Tejun Heod95a7172006-05-15 20:58:14 +09001066 ata_port_flush_task(ap);
1067
1068 if (!rc) {
Jeff Garzikba6a1302006-06-22 23:46:10 -04001069 spin_lock_irqsave(ap->lock, flags);
Tejun Heoa2a7a662005-12-13 14:48:31 +09001070
1071 /* We're racing with irq here. If we lose, the
1072 * following test prevents us from completing the qc
Tejun Heod95a7172006-05-15 20:58:14 +09001073 * twice. If we win, the port is frozen and will be
1074 * cleaned up by ->post_internal_cmd().
Tejun Heoa2a7a662005-12-13 14:48:31 +09001075 */
Tejun Heo77853bf2006-01-23 13:09:36 +09001076 if (qc->flags & ATA_QCFLAG_ACTIVE) {
Tejun Heod95a7172006-05-15 20:58:14 +09001077 qc->err_mask |= AC_ERR_TIMEOUT;
1078
1079 if (ap->ops->error_handler)
1080 ata_port_freeze(ap);
1081 else
1082 ata_qc_complete(qc);
Tejun Heof15a1da2006-05-15 20:57:56 +09001083
Borislav Petkov0dd4b212006-06-23 02:29:08 -04001084 if (ata_msg_warn(ap))
1085 ata_dev_printk(dev, KERN_WARNING,
Tejun Heo88574552006-06-25 20:00:35 +09001086 "qc timeout (cmd 0x%x)\n", command);
Tejun Heoa2a7a662005-12-13 14:48:31 +09001087 }
1088
Jeff Garzikba6a1302006-06-22 23:46:10 -04001089 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heoa2a7a662005-12-13 14:48:31 +09001090 }
1091
Tejun Heod95a7172006-05-15 20:58:14 +09001092 /* do post_internal_cmd */
1093 if (ap->ops->post_internal_cmd)
1094 ap->ops->post_internal_cmd(qc);
1095
1096 if (qc->flags & ATA_QCFLAG_FAILED && !qc->err_mask) {
Borislav Petkov0dd4b212006-06-23 02:29:08 -04001097 if (ata_msg_warn(ap))
Tejun Heo88574552006-06-25 20:00:35 +09001098 ata_dev_printk(dev, KERN_WARNING,
Borislav Petkov0dd4b212006-06-23 02:29:08 -04001099 "zero err_mask for failed "
Tejun Heo88574552006-06-25 20:00:35 +09001100 "internal command, assuming AC_ERR_OTHER\n");
Tejun Heod95a7172006-05-15 20:58:14 +09001101 qc->err_mask |= AC_ERR_OTHER;
1102 }
1103
Tejun Heo15869302006-05-15 20:57:33 +09001104 /* finish up */
Jeff Garzikba6a1302006-06-22 23:46:10 -04001105 spin_lock_irqsave(ap->lock, flags);
Tejun Heo15869302006-05-15 20:57:33 +09001106
Tejun Heoe61e0672006-05-15 20:57:40 +09001107 *tf = qc->result_tf;
Tejun Heo77853bf2006-01-23 13:09:36 +09001108 err_mask = qc->err_mask;
1109
1110 ata_qc_free(qc);
Tejun Heo2ab7db12006-05-15 20:58:02 +09001111 ap->active_tag = preempted_tag;
Tejun Heodedaf2b2006-05-15 21:03:43 +09001112 ap->sactive = preempted_sactive;
1113 ap->qc_active = preempted_qc_active;
Tejun Heo77853bf2006-01-23 13:09:36 +09001114
Tejun Heo1f7dd3e2006-03-24 15:25:30 +09001115 /* XXX - Some LLDDs (sata_mv) disable port on command failure.
1116 * Until those drivers are fixed, we detect the condition
1117 * here, fail the command with AC_ERR_SYSTEM and reenable the
1118 * port.
1119 *
1120 * Note that this doesn't change any behavior as internal
1121 * command failure results in disabling the device in the
1122 * higher layer for LLDDs without new reset/EH callbacks.
1123 *
1124 * Kill the following code as soon as those drivers are fixed.
1125 */
Tejun Heo198e0fe2006-04-02 18:51:52 +09001126 if (ap->flags & ATA_FLAG_DISABLED) {
Tejun Heo1f7dd3e2006-03-24 15:25:30 +09001127 err_mask |= AC_ERR_SYSTEM;
1128 ata_port_probe(ap);
1129 }
1130
Jeff Garzikba6a1302006-06-22 23:46:10 -04001131 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heo15869302006-05-15 20:57:33 +09001132
Tejun Heo77853bf2006-01-23 13:09:36 +09001133 return err_mask;
Tejun Heoa2a7a662005-12-13 14:48:31 +09001134}
1135
Linus Torvalds1da177e2005-04-16 15:20:36 -07001136/**
Tejun Heo977e6b92006-06-24 20:30:19 +09001137 * ata_do_simple_cmd - execute simple internal command
1138 * @dev: Device to which the command is sent
1139 * @cmd: Opcode to execute
1140 *
1141 * Execute a 'simple' command, that only consists of the opcode
1142 * 'cmd' itself, without filling any other registers
1143 *
1144 * LOCKING:
1145 * Kernel thread context (may sleep).
1146 *
1147 * RETURNS:
1148 * Zero on success, AC_ERR_* mask on failure
Tejun Heoe58eb582006-06-24 20:30:19 +09001149 */
Tejun Heo77b08fb2006-06-24 20:30:19 +09001150unsigned int ata_do_simple_cmd(struct ata_device *dev, u8 cmd)
Tejun Heoe58eb582006-06-24 20:30:19 +09001151{
1152 struct ata_taskfile tf;
Tejun Heoe58eb582006-06-24 20:30:19 +09001153
1154 ata_tf_init(dev, &tf);
1155
1156 tf.command = cmd;
1157 tf.flags |= ATA_TFLAG_DEVICE;
1158 tf.protocol = ATA_PROT_NODATA;
1159
Tejun Heo977e6b92006-06-24 20:30:19 +09001160 return ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0);
Tejun Heoe58eb582006-06-24 20:30:19 +09001161}
1162
Linus Torvalds1da177e2005-04-16 15:20:36 -07001163/**
Alan Cox1bc4ccf2006-01-09 17:18:14 +00001164 * ata_pio_need_iordy - check if iordy needed
1165 * @adev: ATA device
1166 *
1167 * Check if the current speed of the device requires IORDY. Used
1168 * by various controllers for chip configuration.
1169 */
1170
1171unsigned int ata_pio_need_iordy(const struct ata_device *adev)
1172{
1173 int pio;
1174 int speed = adev->pio_mode - XFER_PIO_0;
1175
1176 if (speed < 2)
1177 return 0;
1178 if (speed > 2)
1179 return 1;
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05001180
Alan Cox1bc4ccf2006-01-09 17:18:14 +00001181 /* If we have no drive specific rule, then PIO 2 is non IORDY */
1182
1183 if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE */
1184 pio = adev->id[ATA_ID_EIDE_PIO];
1185 /* Is the speed faster than the drive allows non IORDY ? */
1186 if (pio) {
1187 /* This is cycle times not frequency - watch the logic! */
1188 if (pio > 240) /* PIO2 is 240nS per cycle */
1189 return 1;
1190 return 0;
1191 }
1192 }
1193 return 0;
1194}
1195
1196/**
Tejun Heo49016ac2006-02-21 02:12:11 +09001197 * ata_dev_read_id - Read ID data from the specified device
Tejun Heo49016ac2006-02-21 02:12:11 +09001198 * @dev: target device
1199 * @p_class: pointer to class of the target device (may be changed)
1200 * @post_reset: is this read ID post-reset?
Tejun Heofe635c72006-05-15 20:57:35 +09001201 * @id: buffer to read IDENTIFY data into
Tejun Heo49016ac2006-02-21 02:12:11 +09001202 *
1203 * Read ID data from the specified device. ATA_CMD_ID_ATA is
1204 * performed on ATA devices and ATA_CMD_ID_ATAPI on ATAPI
Tejun Heoaec5c3c2006-03-25 01:33:34 +09001205 * devices. This function also issues ATA_CMD_INIT_DEV_PARAMS
1206 * for pre-ATA4 drives.
Tejun Heo49016ac2006-02-21 02:12:11 +09001207 *
1208 * LOCKING:
1209 * Kernel thread context (may sleep)
1210 *
1211 * RETURNS:
1212 * 0 on success, -errno otherwise.
1213 */
Tejun Heoa9beec92006-05-31 18:27:44 +09001214int ata_dev_read_id(struct ata_device *dev, unsigned int *p_class,
1215 int post_reset, u16 *id)
Tejun Heo49016ac2006-02-21 02:12:11 +09001216{
Tejun Heo3373efd2006-05-15 20:57:53 +09001217 struct ata_port *ap = dev->ap;
Tejun Heo49016ac2006-02-21 02:12:11 +09001218 unsigned int class = *p_class;
Tejun Heo49016ac2006-02-21 02:12:11 +09001219 struct ata_taskfile tf;
1220 unsigned int err_mask = 0;
1221 const char *reason;
1222 int rc;
1223
Borislav Petkov0dd4b212006-06-23 02:29:08 -04001224 if (ata_msg_ctl(ap))
Tejun Heo88574552006-06-25 20:00:35 +09001225 ata_dev_printk(dev, KERN_DEBUG, "%s: ENTER, host %u, dev %u\n",
1226 __FUNCTION__, ap->id, dev->devno);
Tejun Heo49016ac2006-02-21 02:12:11 +09001227
Tejun Heo49016ac2006-02-21 02:12:11 +09001228 ata_dev_select(ap, dev->devno, 1, 1); /* select device 0/1 */
1229
1230 retry:
Tejun Heo3373efd2006-05-15 20:57:53 +09001231 ata_tf_init(dev, &tf);
Tejun Heo49016ac2006-02-21 02:12:11 +09001232
1233 switch (class) {
1234 case ATA_DEV_ATA:
1235 tf.command = ATA_CMD_ID_ATA;
1236 break;
1237 case ATA_DEV_ATAPI:
1238 tf.command = ATA_CMD_ID_ATAPI;
1239 break;
1240 default:
1241 rc = -ENODEV;
1242 reason = "unsupported class";
1243 goto err_out;
1244 }
1245
1246 tf.protocol = ATA_PROT_PIO;
1247
Tejun Heo3373efd2006-05-15 20:57:53 +09001248 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_FROM_DEVICE,
Tejun Heo49016ac2006-02-21 02:12:11 +09001249 id, sizeof(id[0]) * ATA_ID_WORDS);
Tejun Heo49016ac2006-02-21 02:12:11 +09001250 if (err_mask) {
1251 rc = -EIO;
1252 reason = "I/O error";
Tejun Heo49016ac2006-02-21 02:12:11 +09001253 goto err_out;
1254 }
1255
1256 swap_buf_le16(id, ATA_ID_WORDS);
1257
Tejun Heo49016ac2006-02-21 02:12:11 +09001258 /* sanity check */
Alan Cox692785e2006-03-27 18:49:19 +01001259 if ((class == ATA_DEV_ATA) != (ata_id_is_ata(id) | ata_id_is_cfa(id))) {
Tejun Heo49016ac2006-02-21 02:12:11 +09001260 rc = -EINVAL;
1261 reason = "device reports illegal type";
1262 goto err_out;
1263 }
1264
1265 if (post_reset && class == ATA_DEV_ATA) {
1266 /*
1267 * The exact sequence expected by certain pre-ATA4 drives is:
1268 * SRST RESET
1269 * IDENTIFY
1270 * INITIALIZE DEVICE PARAMETERS
1271 * anything else..
1272 * Some drives were very specific about that exact sequence.
1273 */
1274 if (ata_id_major_version(id) < 4 || !ata_id_has_lba(id)) {
Tejun Heo3373efd2006-05-15 20:57:53 +09001275 err_mask = ata_dev_init_params(dev, id[3], id[6]);
Tejun Heo49016ac2006-02-21 02:12:11 +09001276 if (err_mask) {
1277 rc = -EIO;
1278 reason = "INIT_DEV_PARAMS failed";
1279 goto err_out;
1280 }
1281
1282 /* current CHS translation info (id[53-58]) might be
1283 * changed. reread the identify device info.
1284 */
1285 post_reset = 0;
1286 goto retry;
1287 }
1288 }
1289
1290 *p_class = class;
Tejun Heofe635c72006-05-15 20:57:35 +09001291
Tejun Heo49016ac2006-02-21 02:12:11 +09001292 return 0;
1293
1294 err_out:
Tejun Heo88574552006-06-25 20:00:35 +09001295 if (ata_msg_warn(ap))
Borislav Petkov0dd4b212006-06-23 02:29:08 -04001296 ata_dev_printk(dev, KERN_WARNING, "failed to IDENTIFY "
Tejun Heo88574552006-06-25 20:00:35 +09001297 "(%s, err_mask=0x%x)\n", reason, err_mask);
Tejun Heo49016ac2006-02-21 02:12:11 +09001298 return rc;
1299}
1300
Tejun Heo3373efd2006-05-15 20:57:53 +09001301static inline u8 ata_dev_knobble(struct ata_device *dev)
Tejun Heo4b2f3ed2006-03-01 16:09:36 +09001302{
Tejun Heo3373efd2006-05-15 20:57:53 +09001303 return ((dev->ap->cbl == ATA_CBL_SATA) && (!ata_id_is_sata(dev->id)));
Tejun Heo4b2f3ed2006-03-01 16:09:36 +09001304}
1305
Tejun Heoa6e6ce82006-05-15 21:03:48 +09001306static void ata_dev_config_ncq(struct ata_device *dev,
1307 char *desc, size_t desc_sz)
1308{
1309 struct ata_port *ap = dev->ap;
1310 int hdepth = 0, ddepth = ata_id_queue_depth(dev->id);
1311
1312 if (!ata_id_has_ncq(dev->id)) {
1313 desc[0] = '\0';
1314 return;
1315 }
1316
1317 if (ap->flags & ATA_FLAG_NCQ) {
1318 hdepth = min(ap->host->can_queue, ATA_MAX_QUEUE - 1);
1319 dev->flags |= ATA_DFLAG_NCQ;
1320 }
1321
1322 if (hdepth >= ddepth)
1323 snprintf(desc, desc_sz, "NCQ (depth %d)", ddepth);
1324 else
1325 snprintf(desc, desc_sz, "NCQ (depth %d/%d)", hdepth, ddepth);
1326}
1327
Brian Kinge6d902a2006-06-28 08:30:31 -05001328static void ata_set_port_max_cmd_len(struct ata_port *ap)
1329{
1330 int i;
1331
1332 if (ap->host) {
1333 ap->host->max_cmd_len = 0;
1334 for (i = 0; i < ATA_MAX_DEVICES; i++)
1335 ap->host->max_cmd_len = max_t(unsigned int,
1336 ap->host->max_cmd_len,
1337 ap->device[i].cdb_len);
1338 }
1339}
1340
Tejun Heo49016ac2006-02-21 02:12:11 +09001341/**
Tejun Heoffeae412006-03-01 16:09:35 +09001342 * ata_dev_configure - Configure the specified ATA/ATAPI device
Tejun Heoffeae412006-03-01 16:09:35 +09001343 * @dev: Target device to configure
Tejun Heo4c2d7212006-03-05 17:55:58 +09001344 * @print_info: Enable device info printout
Linus Torvalds1da177e2005-04-16 15:20:36 -07001345 *
Tejun Heoffeae412006-03-01 16:09:35 +09001346 * Configure @dev according to @dev->id. Generic and low-level
1347 * driver specific fixups are also applied.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001348 *
1349 * LOCKING:
Tejun Heoffeae412006-03-01 16:09:35 +09001350 * Kernel thread context (may sleep)
1351 *
1352 * RETURNS:
1353 * 0 on success, -errno otherwise
Linus Torvalds1da177e2005-04-16 15:20:36 -07001354 */
Tejun Heoa9beec92006-05-31 18:27:44 +09001355int ata_dev_configure(struct ata_device *dev, int print_info)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001356{
Tejun Heo3373efd2006-05-15 20:57:53 +09001357 struct ata_port *ap = dev->ap;
Tejun Heo1148c3a2006-03-13 19:48:04 +09001358 const u16 *id = dev->id;
Tejun Heoff8854b2006-03-06 04:31:56 +09001359 unsigned int xfer_mask;
Brian Kinge6d902a2006-06-28 08:30:31 -05001360 int rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001361
Borislav Petkov0dd4b212006-06-23 02:29:08 -04001362 if (!ata_dev_enabled(dev) && ata_msg_info(ap)) {
Tejun Heo88574552006-06-25 20:00:35 +09001363 ata_dev_printk(dev, KERN_INFO,
1364 "%s: ENTER/EXIT (host %u, dev %u) -- nodev\n",
1365 __FUNCTION__, ap->id, dev->devno);
Tejun Heoffeae412006-03-01 16:09:35 +09001366 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001367 }
1368
Borislav Petkov0dd4b212006-06-23 02:29:08 -04001369 if (ata_msg_probe(ap))
Tejun Heo88574552006-06-25 20:00:35 +09001370 ata_dev_printk(dev, KERN_DEBUG, "%s: ENTER, host %u, dev %u\n",
1371 __FUNCTION__, ap->id, dev->devno);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001372
Tejun Heoc39f5eb2006-03-13 19:51:19 +09001373 /* print device capabilities */
Borislav Petkov0dd4b212006-06-23 02:29:08 -04001374 if (ata_msg_probe(ap))
Tejun Heo88574552006-06-25 20:00:35 +09001375 ata_dev_printk(dev, KERN_DEBUG,
1376 "%s: cfg 49:%04x 82:%04x 83:%04x 84:%04x "
1377 "85:%04x 86:%04x 87:%04x 88:%04x\n",
Borislav Petkov0dd4b212006-06-23 02:29:08 -04001378 __FUNCTION__,
Tejun Heof15a1da2006-05-15 20:57:56 +09001379 id[49], id[82], id[83], id[84],
1380 id[85], id[86], id[87], id[88]);
Tejun Heoc39f5eb2006-03-13 19:51:19 +09001381
Tejun Heo208a9932006-03-05 17:55:58 +09001382 /* initialize to-be-configured parameters */
Tejun Heoea1dd4e2006-04-02 18:51:53 +09001383 dev->flags &= ~ATA_DFLAG_CFG_MASK;
Tejun Heo208a9932006-03-05 17:55:58 +09001384 dev->max_sectors = 0;
1385 dev->cdb_len = 0;
1386 dev->n_sectors = 0;
1387 dev->cylinders = 0;
1388 dev->heads = 0;
1389 dev->sectors = 0;
1390
Linus Torvalds1da177e2005-04-16 15:20:36 -07001391 /*
1392 * common ATA, ATAPI feature tests
1393 */
1394
Tejun Heoff8854b2006-03-06 04:31:56 +09001395 /* find max transfer mode; for printk only */
Tejun Heo1148c3a2006-03-13 19:48:04 +09001396 xfer_mask = ata_id_xfermask(id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001397
Borislav Petkov0dd4b212006-06-23 02:29:08 -04001398 if (ata_msg_probe(ap))
1399 ata_dump_id(id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001400
1401 /* ATA-specific feature tests */
1402 if (dev->class == ATA_DEV_ATA) {
Tejun Heo1148c3a2006-03-13 19:48:04 +09001403 dev->n_sectors = ata_id_n_sectors(id);
Tejun Heo29407402006-02-12 22:47:04 +09001404
Tejun Heo1148c3a2006-03-13 19:48:04 +09001405 if (ata_id_has_lba(id)) {
Tejun Heo4c2d7212006-03-05 17:55:58 +09001406 const char *lba_desc;
Tejun Heoa6e6ce82006-05-15 21:03:48 +09001407 char ncq_desc[20];
Albert Lee8bf62ec2005-05-12 15:29:42 -04001408
Tejun Heo4c2d7212006-03-05 17:55:58 +09001409 lba_desc = "LBA";
1410 dev->flags |= ATA_DFLAG_LBA;
Tejun Heo1148c3a2006-03-13 19:48:04 +09001411 if (ata_id_has_lba48(id)) {
Albert Lee8bf62ec2005-05-12 15:29:42 -04001412 dev->flags |= ATA_DFLAG_LBA48;
Tejun Heo4c2d7212006-03-05 17:55:58 +09001413 lba_desc = "LBA48";
1414 }
Albert Lee8bf62ec2005-05-12 15:29:42 -04001415
Tejun Heoa6e6ce82006-05-15 21:03:48 +09001416 /* config NCQ */
1417 ata_dev_config_ncq(dev, ncq_desc, sizeof(ncq_desc));
1418
Albert Lee8bf62ec2005-05-12 15:29:42 -04001419 /* print device info to dmesg */
Borislav Petkov5afc8142006-06-27 14:51:25 +02001420 if (ata_msg_drv(ap) && print_info)
Tejun Heof15a1da2006-05-15 20:57:56 +09001421 ata_dev_printk(dev, KERN_INFO, "ATA-%d, "
Tejun Heoa6e6ce82006-05-15 21:03:48 +09001422 "max %s, %Lu sectors: %s %s\n",
Tejun Heof15a1da2006-05-15 20:57:56 +09001423 ata_id_major_version(id),
1424 ata_mode_string(xfer_mask),
1425 (unsigned long long)dev->n_sectors,
Tejun Heoa6e6ce82006-05-15 21:03:48 +09001426 lba_desc, ncq_desc);
Tejun Heoffeae412006-03-01 16:09:35 +09001427 } else {
Albert Lee8bf62ec2005-05-12 15:29:42 -04001428 /* CHS */
1429
1430 /* Default translation */
Tejun Heo1148c3a2006-03-13 19:48:04 +09001431 dev->cylinders = id[1];
1432 dev->heads = id[3];
1433 dev->sectors = id[6];
Albert Lee8bf62ec2005-05-12 15:29:42 -04001434
Tejun Heo1148c3a2006-03-13 19:48:04 +09001435 if (ata_id_current_chs_valid(id)) {
Albert Lee8bf62ec2005-05-12 15:29:42 -04001436 /* Current CHS translation is valid. */
Tejun Heo1148c3a2006-03-13 19:48:04 +09001437 dev->cylinders = id[54];
1438 dev->heads = id[55];
1439 dev->sectors = id[56];
Albert Lee8bf62ec2005-05-12 15:29:42 -04001440 }
1441
1442 /* print device info to dmesg */
Borislav Petkov5afc8142006-06-27 14:51:25 +02001443 if (ata_msg_drv(ap) && print_info)
Tejun Heof15a1da2006-05-15 20:57:56 +09001444 ata_dev_printk(dev, KERN_INFO, "ATA-%d, "
1445 "max %s, %Lu sectors: CHS %u/%u/%u\n",
1446 ata_id_major_version(id),
1447 ata_mode_string(xfer_mask),
1448 (unsigned long long)dev->n_sectors,
Tejun Heo88574552006-06-25 20:00:35 +09001449 dev->cylinders, dev->heads,
1450 dev->sectors);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001451 }
1452
Albert Lee07f6f7d2005-11-01 19:33:20 +08001453 if (dev->id[59] & 0x100) {
1454 dev->multi_count = dev->id[59] & 0xff;
Borislav Petkov5afc8142006-06-27 14:51:25 +02001455 if (ata_msg_drv(ap) && print_info)
Tejun Heo88574552006-06-25 20:00:35 +09001456 ata_dev_printk(dev, KERN_INFO,
1457 "ata%u: dev %u multi count %u\n",
1458 ap->id, dev->devno, dev->multi_count);
Albert Lee07f6f7d2005-11-01 19:33:20 +08001459 }
1460
Tejun Heo6e7846e2006-02-12 23:32:58 +09001461 dev->cdb_len = 16;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001462 }
1463
1464 /* ATAPI-specific feature tests */
Jeff Garzik2c13b7c2005-11-14 14:14:16 -05001465 else if (dev->class == ATA_DEV_ATAPI) {
Albert Lee08a556d2006-03-31 13:29:04 +08001466 char *cdb_intr_string = "";
1467
Tejun Heo1148c3a2006-03-13 19:48:04 +09001468 rc = atapi_cdb_len(id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001469 if ((rc < 12) || (rc > ATAPI_CDB_LEN)) {
Borislav Petkov0dd4b212006-06-23 02:29:08 -04001470 if (ata_msg_warn(ap))
Tejun Heo88574552006-06-25 20:00:35 +09001471 ata_dev_printk(dev, KERN_WARNING,
1472 "unsupported CDB len\n");
Tejun Heoffeae412006-03-01 16:09:35 +09001473 rc = -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001474 goto err_out_nosup;
1475 }
Tejun Heo6e7846e2006-02-12 23:32:58 +09001476 dev->cdb_len = (unsigned int) rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001477
Albert Lee08a556d2006-03-31 13:29:04 +08001478 if (ata_id_cdb_intr(dev->id)) {
Albert Lee312f7da2005-09-27 17:38:03 +08001479 dev->flags |= ATA_DFLAG_CDB_INTR;
Albert Lee08a556d2006-03-31 13:29:04 +08001480 cdb_intr_string = ", CDB intr";
1481 }
Albert Lee312f7da2005-09-27 17:38:03 +08001482
Linus Torvalds1da177e2005-04-16 15:20:36 -07001483 /* print device info to dmesg */
Borislav Petkov5afc8142006-06-27 14:51:25 +02001484 if (ata_msg_drv(ap) && print_info)
Tejun Heo12436c32006-05-15 20:59:15 +09001485 ata_dev_printk(dev, KERN_INFO, "ATAPI, max %s%s\n",
1486 ata_mode_string(xfer_mask),
1487 cdb_intr_string);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001488 }
1489
Brian Kinge6d902a2006-06-28 08:30:31 -05001490 ata_set_port_max_cmd_len(ap);
Tejun Heo6e7846e2006-02-12 23:32:58 +09001491
Tejun Heo4b2f3ed2006-03-01 16:09:36 +09001492 /* limit bridge transfers to udma5, 200 sectors */
Tejun Heo3373efd2006-05-15 20:57:53 +09001493 if (ata_dev_knobble(dev)) {
Borislav Petkov5afc8142006-06-27 14:51:25 +02001494 if (ata_msg_drv(ap) && print_info)
Tejun Heof15a1da2006-05-15 20:57:56 +09001495 ata_dev_printk(dev, KERN_INFO,
1496 "applying bridge limits\n");
Tejun Heo5a529132006-03-24 14:07:50 +09001497 dev->udma_mask &= ATA_UDMA5;
Tejun Heo4b2f3ed2006-03-01 16:09:36 +09001498 dev->max_sectors = ATA_MAX_SECTORS;
1499 }
1500
1501 if (ap->ops->dev_config)
1502 ap->ops->dev_config(ap, dev);
1503
Borislav Petkov0dd4b212006-06-23 02:29:08 -04001504 if (ata_msg_probe(ap))
1505 ata_dev_printk(dev, KERN_DEBUG, "%s: EXIT, drv_stat = 0x%x\n",
1506 __FUNCTION__, ata_chk_status(ap));
Tejun Heoffeae412006-03-01 16:09:35 +09001507 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001508
1509err_out_nosup:
Borislav Petkov0dd4b212006-06-23 02:29:08 -04001510 if (ata_msg_probe(ap))
Tejun Heo88574552006-06-25 20:00:35 +09001511 ata_dev_printk(dev, KERN_DEBUG,
1512 "%s: EXIT, err\n", __FUNCTION__);
Tejun Heoffeae412006-03-01 16:09:35 +09001513 return rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001514}
1515
1516/**
1517 * ata_bus_probe - Reset and probe ATA bus
1518 * @ap: Bus to probe
1519 *
Jeff Garzik0cba6322005-05-30 19:49:12 -04001520 * Master ATA bus probing function. Initiates a hardware-dependent
1521 * bus reset, then attempts to identify any devices found on
1522 * the bus.
1523 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07001524 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04001525 * PCI/etc. bus probe sem.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001526 *
1527 * RETURNS:
Tejun Heo96072e62006-04-01 01:38:17 +09001528 * Zero on success, negative errno otherwise.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001529 */
1530
1531static int ata_bus_probe(struct ata_port *ap)
1532{
Tejun Heo28ca5c52006-03-01 16:09:36 +09001533 unsigned int classes[ATA_MAX_DEVICES];
Tejun Heo14d2bac2006-04-02 17:54:46 +09001534 int tries[ATA_MAX_DEVICES];
1535 int i, rc, down_xfermask;
Tejun Heoe82cbdb2006-04-01 01:38:18 +09001536 struct ata_device *dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001537
Tejun Heo28ca5c52006-03-01 16:09:36 +09001538 ata_port_probe(ap);
1539
Tejun Heo14d2bac2006-04-02 17:54:46 +09001540 for (i = 0; i < ATA_MAX_DEVICES; i++)
1541 tries[i] = ATA_PROBE_MAX_TRIES;
1542
1543 retry:
1544 down_xfermask = 0;
1545
Tejun Heo20444702006-03-13 01:57:01 +09001546 /* reset and determine device classes */
Tejun Heo52783c52006-05-31 18:28:22 +09001547 ap->ops->phy_reset(ap);
Tejun Heo2061a472006-03-12 00:57:39 +09001548
Tejun Heo52783c52006-05-31 18:28:22 +09001549 for (i = 0; i < ATA_MAX_DEVICES; i++) {
1550 dev = &ap->device[i];
Tejun Heoc19ba8a2006-01-24 17:05:22 +09001551
Tejun Heo52783c52006-05-31 18:28:22 +09001552 if (!(ap->flags & ATA_FLAG_DISABLED) &&
1553 dev->class != ATA_DEV_UNKNOWN)
1554 classes[dev->devno] = dev->class;
1555 else
1556 classes[dev->devno] = ATA_DEV_NONE;
Tejun Heo20444702006-03-13 01:57:01 +09001557
Tejun Heo52783c52006-05-31 18:28:22 +09001558 dev->class = ATA_DEV_UNKNOWN;
Tejun Heo28ca5c52006-03-01 16:09:36 +09001559 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001560
Tejun Heo52783c52006-05-31 18:28:22 +09001561 ata_port_probe(ap);
Tejun Heo20444702006-03-13 01:57:01 +09001562
Alan Coxb6079ca2006-05-22 16:52:06 +01001563 /* after the reset the device state is PIO 0 and the controller
1564 state is undefined. Record the mode */
1565
1566 for (i = 0; i < ATA_MAX_DEVICES; i++)
1567 ap->device[i].pio_mode = XFER_PIO_0;
1568
Tejun Heo28ca5c52006-03-01 16:09:36 +09001569 /* read IDENTIFY page and configure devices */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001570 for (i = 0; i < ATA_MAX_DEVICES; i++) {
Tejun Heoe82cbdb2006-04-01 01:38:18 +09001571 dev = &ap->device[i];
Tejun Heo28ca5c52006-03-01 16:09:36 +09001572
Tejun Heoec573752006-04-11 22:26:29 +09001573 if (tries[i])
1574 dev->class = classes[i];
Tejun Heo14d2bac2006-04-02 17:54:46 +09001575
Tejun Heoe1211e32006-04-01 01:38:18 +09001576 if (!ata_dev_enabled(dev))
Tejun Heoffeae412006-03-01 16:09:35 +09001577 continue;
1578
Tejun Heo3373efd2006-05-15 20:57:53 +09001579 rc = ata_dev_read_id(dev, &dev->class, 1, dev->id);
Tejun Heo14d2bac2006-04-02 17:54:46 +09001580 if (rc)
1581 goto fail;
Tejun Heoffeae412006-03-01 16:09:35 +09001582
Tejun Heo3373efd2006-05-15 20:57:53 +09001583 rc = ata_dev_configure(dev, 1);
Tejun Heo14d2bac2006-04-02 17:54:46 +09001584 if (rc)
1585 goto fail;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001586 }
1587
Tejun Heoe82cbdb2006-04-01 01:38:18 +09001588 /* configure transfer mode */
Tejun Heo3adcebb2006-05-15 20:57:37 +09001589 rc = ata_set_mode(ap, &dev);
Tejun Heo51713d32006-04-11 22:26:29 +09001590 if (rc) {
1591 down_xfermask = 1;
1592 goto fail;
Tejun Heoe82cbdb2006-04-01 01:38:18 +09001593 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001594
Tejun Heoe82cbdb2006-04-01 01:38:18 +09001595 for (i = 0; i < ATA_MAX_DEVICES; i++)
1596 if (ata_dev_enabled(&ap->device[i]))
1597 return 0;
Alan Coxe35a9e02006-03-27 18:46:37 +01001598
Tejun Heoe82cbdb2006-04-01 01:38:18 +09001599 /* no device present, disable port */
1600 ata_port_disable(ap);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001601 ap->ops->port_disable(ap);
Tejun Heo96072e62006-04-01 01:38:17 +09001602 return -ENODEV;
Tejun Heo14d2bac2006-04-02 17:54:46 +09001603
1604 fail:
1605 switch (rc) {
1606 case -EINVAL:
1607 case -ENODEV:
1608 tries[dev->devno] = 0;
1609 break;
1610 case -EIO:
Tejun Heo3c567b72006-05-15 20:57:23 +09001611 sata_down_spd_limit(ap);
Tejun Heo14d2bac2006-04-02 17:54:46 +09001612 /* fall through */
1613 default:
1614 tries[dev->devno]--;
1615 if (down_xfermask &&
Tejun Heo3373efd2006-05-15 20:57:53 +09001616 ata_down_xfermask_limit(dev, tries[dev->devno] == 1))
Tejun Heo14d2bac2006-04-02 17:54:46 +09001617 tries[dev->devno] = 0;
1618 }
1619
Tejun Heoec573752006-04-11 22:26:29 +09001620 if (!tries[dev->devno]) {
Tejun Heo3373efd2006-05-15 20:57:53 +09001621 ata_down_xfermask_limit(dev, 1);
1622 ata_dev_disable(dev);
Tejun Heoec573752006-04-11 22:26:29 +09001623 }
1624
Tejun Heo14d2bac2006-04-02 17:54:46 +09001625 goto retry;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001626}
1627
1628/**
Jeff Garzik0cba6322005-05-30 19:49:12 -04001629 * ata_port_probe - Mark port as enabled
1630 * @ap: Port for which we indicate enablement
Linus Torvalds1da177e2005-04-16 15:20:36 -07001631 *
Jeff Garzik0cba6322005-05-30 19:49:12 -04001632 * Modify @ap data structure such that the system
1633 * thinks that the entire port is enabled.
1634 *
1635 * LOCKING: host_set lock, or some other form of
1636 * serialization.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001637 */
1638
1639void ata_port_probe(struct ata_port *ap)
1640{
Tejun Heo198e0fe2006-04-02 18:51:52 +09001641 ap->flags &= ~ATA_FLAG_DISABLED;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001642}
1643
1644/**
Tejun Heo3be680b2005-12-19 22:35:02 +09001645 * sata_print_link_status - Print SATA link status
1646 * @ap: SATA port to printk link status about
1647 *
1648 * This function prints link speed and status of a SATA link.
1649 *
1650 * LOCKING:
1651 * None.
1652 */
1653static void sata_print_link_status(struct ata_port *ap)
1654{
Tejun Heo6d5f9732006-04-03 00:09:41 +09001655 u32 sstatus, scontrol, tmp;
Tejun Heo3be680b2005-12-19 22:35:02 +09001656
Tejun Heo81952c52006-05-15 20:57:47 +09001657 if (sata_scr_read(ap, SCR_STATUS, &sstatus))
Tejun Heo3be680b2005-12-19 22:35:02 +09001658 return;
Tejun Heo81952c52006-05-15 20:57:47 +09001659 sata_scr_read(ap, SCR_CONTROL, &scontrol);
Tejun Heo3be680b2005-12-19 22:35:02 +09001660
Tejun Heo81952c52006-05-15 20:57:47 +09001661 if (ata_port_online(ap)) {
Tejun Heo3be680b2005-12-19 22:35:02 +09001662 tmp = (sstatus >> 4) & 0xf;
Tejun Heof15a1da2006-05-15 20:57:56 +09001663 ata_port_printk(ap, KERN_INFO,
1664 "SATA link up %s (SStatus %X SControl %X)\n",
1665 sata_spd_string(tmp), sstatus, scontrol);
Tejun Heo3be680b2005-12-19 22:35:02 +09001666 } else {
Tejun Heof15a1da2006-05-15 20:57:56 +09001667 ata_port_printk(ap, KERN_INFO,
1668 "SATA link down (SStatus %X SControl %X)\n",
1669 sstatus, scontrol);
Tejun Heo3be680b2005-12-19 22:35:02 +09001670 }
1671}
1672
1673/**
Jeff Garzik780a87f2005-05-30 15:41:05 -04001674 * __sata_phy_reset - Wake/reset a low-level SATA PHY
1675 * @ap: SATA port associated with target SATA PHY.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001676 *
Jeff Garzik780a87f2005-05-30 15:41:05 -04001677 * This function issues commands to standard SATA Sxxx
1678 * PHY registers, to wake up the phy (and device), and
1679 * clear any reset condition.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001680 *
1681 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04001682 * PCI/etc. bus probe sem.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001683 *
1684 */
1685void __sata_phy_reset(struct ata_port *ap)
1686{
1687 u32 sstatus;
1688 unsigned long timeout = jiffies + (HZ * 5);
1689
1690 if (ap->flags & ATA_FLAG_SATA_RESET) {
Brett Russcdcca892005-03-28 15:10:27 -05001691 /* issue phy wake/reset */
Tejun Heo81952c52006-05-15 20:57:47 +09001692 sata_scr_write_flush(ap, SCR_CONTROL, 0x301);
Tejun Heo62ba2842005-06-26 23:27:19 +09001693 /* Couldn't find anything in SATA I/II specs, but
1694 * AHCI-1.1 10.4.2 says at least 1 ms. */
1695 mdelay(1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001696 }
Tejun Heo81952c52006-05-15 20:57:47 +09001697 /* phy wake/clear reset */
1698 sata_scr_write_flush(ap, SCR_CONTROL, 0x300);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001699
1700 /* wait for phy to become ready, if necessary */
1701 do {
1702 msleep(200);
Tejun Heo81952c52006-05-15 20:57:47 +09001703 sata_scr_read(ap, SCR_STATUS, &sstatus);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001704 if ((sstatus & 0xf) != 1)
1705 break;
1706 } while (time_before(jiffies, timeout));
1707
Tejun Heo3be680b2005-12-19 22:35:02 +09001708 /* print link status */
1709 sata_print_link_status(ap);
Jeff Garzik656563e2005-11-20 03:36:45 -05001710
Tejun Heo3be680b2005-12-19 22:35:02 +09001711 /* TODO: phy layer with polling, timeouts, etc. */
Tejun Heo81952c52006-05-15 20:57:47 +09001712 if (!ata_port_offline(ap))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001713 ata_port_probe(ap);
Tejun Heo3be680b2005-12-19 22:35:02 +09001714 else
Linus Torvalds1da177e2005-04-16 15:20:36 -07001715 ata_port_disable(ap);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001716
Tejun Heo198e0fe2006-04-02 18:51:52 +09001717 if (ap->flags & ATA_FLAG_DISABLED)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001718 return;
1719
1720 if (ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT)) {
1721 ata_port_disable(ap);
1722 return;
1723 }
1724
1725 ap->cbl = ATA_CBL_SATA;
1726}
1727
1728/**
Jeff Garzik780a87f2005-05-30 15:41:05 -04001729 * sata_phy_reset - Reset SATA bus.
1730 * @ap: SATA port associated with target SATA PHY.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001731 *
Jeff Garzik780a87f2005-05-30 15:41:05 -04001732 * This function resets the SATA bus, and then probes
1733 * the bus for devices.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001734 *
1735 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04001736 * PCI/etc. bus probe sem.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001737 *
1738 */
1739void sata_phy_reset(struct ata_port *ap)
1740{
1741 __sata_phy_reset(ap);
Tejun Heo198e0fe2006-04-02 18:51:52 +09001742 if (ap->flags & ATA_FLAG_DISABLED)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001743 return;
1744 ata_bus_reset(ap);
1745}
1746
1747/**
Alan Coxebdfca62006-03-23 15:38:34 +00001748 * ata_dev_pair - return other device on cable
Alan Coxebdfca62006-03-23 15:38:34 +00001749 * @adev: device
1750 *
1751 * Obtain the other device on the same cable, or if none is
1752 * present NULL is returned
1753 */
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05001754
Tejun Heo3373efd2006-05-15 20:57:53 +09001755struct ata_device *ata_dev_pair(struct ata_device *adev)
Alan Coxebdfca62006-03-23 15:38:34 +00001756{
Tejun Heo3373efd2006-05-15 20:57:53 +09001757 struct ata_port *ap = adev->ap;
Alan Coxebdfca62006-03-23 15:38:34 +00001758 struct ata_device *pair = &ap->device[1 - adev->devno];
Tejun Heoe1211e32006-04-01 01:38:18 +09001759 if (!ata_dev_enabled(pair))
Alan Coxebdfca62006-03-23 15:38:34 +00001760 return NULL;
1761 return pair;
1762}
1763
1764/**
Jeff Garzik780a87f2005-05-30 15:41:05 -04001765 * ata_port_disable - Disable port.
1766 * @ap: Port to be disabled.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001767 *
Jeff Garzik780a87f2005-05-30 15:41:05 -04001768 * Modify @ap data structure such that the system
1769 * thinks that the entire port is disabled, and should
1770 * never attempt to probe or communicate with devices
1771 * on this port.
1772 *
1773 * LOCKING: host_set lock, or some other form of
1774 * serialization.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001775 */
1776
1777void ata_port_disable(struct ata_port *ap)
1778{
1779 ap->device[0].class = ATA_DEV_NONE;
1780 ap->device[1].class = ATA_DEV_NONE;
Tejun Heo198e0fe2006-04-02 18:51:52 +09001781 ap->flags |= ATA_FLAG_DISABLED;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001782}
1783
Tejun Heo1c3fae42006-04-02 20:53:28 +09001784/**
Tejun Heo3c567b72006-05-15 20:57:23 +09001785 * sata_down_spd_limit - adjust SATA spd limit downward
Tejun Heo1c3fae42006-04-02 20:53:28 +09001786 * @ap: Port to adjust SATA spd limit for
1787 *
1788 * Adjust SATA spd limit of @ap downward. Note that this
1789 * function only adjusts the limit. The change must be applied
Tejun Heo3c567b72006-05-15 20:57:23 +09001790 * using sata_set_spd().
Tejun Heo1c3fae42006-04-02 20:53:28 +09001791 *
1792 * LOCKING:
1793 * Inherited from caller.
1794 *
1795 * RETURNS:
1796 * 0 on success, negative errno on failure
1797 */
Tejun Heo3c567b72006-05-15 20:57:23 +09001798int sata_down_spd_limit(struct ata_port *ap)
Tejun Heo1c3fae42006-04-02 20:53:28 +09001799{
Tejun Heo81952c52006-05-15 20:57:47 +09001800 u32 sstatus, spd, mask;
1801 int rc, highbit;
Tejun Heo1c3fae42006-04-02 20:53:28 +09001802
Tejun Heo81952c52006-05-15 20:57:47 +09001803 rc = sata_scr_read(ap, SCR_STATUS, &sstatus);
1804 if (rc)
1805 return rc;
Tejun Heo1c3fae42006-04-02 20:53:28 +09001806
1807 mask = ap->sata_spd_limit;
1808 if (mask <= 1)
1809 return -EINVAL;
1810 highbit = fls(mask) - 1;
1811 mask &= ~(1 << highbit);
1812
Tejun Heo81952c52006-05-15 20:57:47 +09001813 spd = (sstatus >> 4) & 0xf;
Tejun Heo1c3fae42006-04-02 20:53:28 +09001814 if (spd <= 1)
1815 return -EINVAL;
1816 spd--;
1817 mask &= (1 << spd) - 1;
1818 if (!mask)
1819 return -EINVAL;
1820
1821 ap->sata_spd_limit = mask;
1822
Tejun Heof15a1da2006-05-15 20:57:56 +09001823 ata_port_printk(ap, KERN_WARNING, "limiting SATA link speed to %s\n",
1824 sata_spd_string(fls(mask)));
Tejun Heo1c3fae42006-04-02 20:53:28 +09001825
1826 return 0;
1827}
1828
Tejun Heo3c567b72006-05-15 20:57:23 +09001829static int __sata_set_spd_needed(struct ata_port *ap, u32 *scontrol)
Tejun Heo1c3fae42006-04-02 20:53:28 +09001830{
1831 u32 spd, limit;
1832
1833 if (ap->sata_spd_limit == UINT_MAX)
1834 limit = 0;
1835 else
1836 limit = fls(ap->sata_spd_limit);
1837
1838 spd = (*scontrol >> 4) & 0xf;
1839 *scontrol = (*scontrol & ~0xf0) | ((limit & 0xf) << 4);
1840
1841 return spd != limit;
1842}
1843
1844/**
Tejun Heo3c567b72006-05-15 20:57:23 +09001845 * sata_set_spd_needed - is SATA spd configuration needed
Tejun Heo1c3fae42006-04-02 20:53:28 +09001846 * @ap: Port in question
1847 *
1848 * Test whether the spd limit in SControl matches
1849 * @ap->sata_spd_limit. This function is used to determine
1850 * whether hardreset is necessary to apply SATA spd
1851 * configuration.
1852 *
1853 * LOCKING:
1854 * Inherited from caller.
1855 *
1856 * RETURNS:
1857 * 1 if SATA spd configuration is needed, 0 otherwise.
1858 */
Tejun Heo3c567b72006-05-15 20:57:23 +09001859int sata_set_spd_needed(struct ata_port *ap)
Tejun Heo1c3fae42006-04-02 20:53:28 +09001860{
1861 u32 scontrol;
1862
Tejun Heo81952c52006-05-15 20:57:47 +09001863 if (sata_scr_read(ap, SCR_CONTROL, &scontrol))
Tejun Heo1c3fae42006-04-02 20:53:28 +09001864 return 0;
1865
Tejun Heo3c567b72006-05-15 20:57:23 +09001866 return __sata_set_spd_needed(ap, &scontrol);
Tejun Heo1c3fae42006-04-02 20:53:28 +09001867}
1868
1869/**
Tejun Heo3c567b72006-05-15 20:57:23 +09001870 * sata_set_spd - set SATA spd according to spd limit
Tejun Heo1c3fae42006-04-02 20:53:28 +09001871 * @ap: Port to set SATA spd for
1872 *
1873 * Set SATA spd of @ap according to sata_spd_limit.
1874 *
1875 * LOCKING:
1876 * Inherited from caller.
1877 *
1878 * RETURNS:
1879 * 0 if spd doesn't need to be changed, 1 if spd has been
Tejun Heo81952c52006-05-15 20:57:47 +09001880 * changed. Negative errno if SCR registers are inaccessible.
Tejun Heo1c3fae42006-04-02 20:53:28 +09001881 */
Tejun Heo3c567b72006-05-15 20:57:23 +09001882int sata_set_spd(struct ata_port *ap)
Tejun Heo1c3fae42006-04-02 20:53:28 +09001883{
1884 u32 scontrol;
Tejun Heo81952c52006-05-15 20:57:47 +09001885 int rc;
Tejun Heo1c3fae42006-04-02 20:53:28 +09001886
Tejun Heo81952c52006-05-15 20:57:47 +09001887 if ((rc = sata_scr_read(ap, SCR_CONTROL, &scontrol)))
1888 return rc;
Tejun Heo1c3fae42006-04-02 20:53:28 +09001889
Tejun Heo3c567b72006-05-15 20:57:23 +09001890 if (!__sata_set_spd_needed(ap, &scontrol))
Tejun Heo1c3fae42006-04-02 20:53:28 +09001891 return 0;
1892
Tejun Heo81952c52006-05-15 20:57:47 +09001893 if ((rc = sata_scr_write(ap, SCR_CONTROL, scontrol)))
1894 return rc;
1895
Tejun Heo1c3fae42006-04-02 20:53:28 +09001896 return 1;
1897}
1898
Alan Cox452503f2005-10-21 19:01:32 -04001899/*
1900 * This mode timing computation functionality is ported over from
1901 * drivers/ide/ide-timing.h and was originally written by Vojtech Pavlik
1902 */
1903/*
1904 * PIO 0-5, MWDMA 0-2 and UDMA 0-6 timings (in nanoseconds).
1905 * These were taken from ATA/ATAPI-6 standard, rev 0a, except
1906 * for PIO 5, which is a nonstandard extension and UDMA6, which
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05001907 * is currently supported only by Maxtor drives.
Alan Cox452503f2005-10-21 19:01:32 -04001908 */
1909
1910static const struct ata_timing ata_timing[] = {
1911
1912 { XFER_UDMA_6, 0, 0, 0, 0, 0, 0, 0, 15 },
1913 { XFER_UDMA_5, 0, 0, 0, 0, 0, 0, 0, 20 },
1914 { XFER_UDMA_4, 0, 0, 0, 0, 0, 0, 0, 30 },
1915 { XFER_UDMA_3, 0, 0, 0, 0, 0, 0, 0, 45 },
1916
1917 { XFER_UDMA_2, 0, 0, 0, 0, 0, 0, 0, 60 },
1918 { XFER_UDMA_1, 0, 0, 0, 0, 0, 0, 0, 80 },
1919 { XFER_UDMA_0, 0, 0, 0, 0, 0, 0, 0, 120 },
1920
1921/* { XFER_UDMA_SLOW, 0, 0, 0, 0, 0, 0, 0, 150 }, */
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05001922
Alan Cox452503f2005-10-21 19:01:32 -04001923 { XFER_MW_DMA_2, 25, 0, 0, 0, 70, 25, 120, 0 },
1924 { XFER_MW_DMA_1, 45, 0, 0, 0, 80, 50, 150, 0 },
1925 { XFER_MW_DMA_0, 60, 0, 0, 0, 215, 215, 480, 0 },
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05001926
Alan Cox452503f2005-10-21 19:01:32 -04001927 { XFER_SW_DMA_2, 60, 0, 0, 0, 120, 120, 240, 0 },
1928 { XFER_SW_DMA_1, 90, 0, 0, 0, 240, 240, 480, 0 },
1929 { XFER_SW_DMA_0, 120, 0, 0, 0, 480, 480, 960, 0 },
1930
1931/* { XFER_PIO_5, 20, 50, 30, 100, 50, 30, 100, 0 }, */
1932 { XFER_PIO_4, 25, 70, 25, 120, 70, 25, 120, 0 },
1933 { XFER_PIO_3, 30, 80, 70, 180, 80, 70, 180, 0 },
1934
1935 { XFER_PIO_2, 30, 290, 40, 330, 100, 90, 240, 0 },
1936 { XFER_PIO_1, 50, 290, 93, 383, 125, 100, 383, 0 },
1937 { XFER_PIO_0, 70, 290, 240, 600, 165, 150, 600, 0 },
1938
1939/* { XFER_PIO_SLOW, 120, 290, 240, 960, 290, 240, 960, 0 }, */
1940
1941 { 0xFF }
1942};
1943
1944#define ENOUGH(v,unit) (((v)-1)/(unit)+1)
1945#define EZ(v,unit) ((v)?ENOUGH(v,unit):0)
1946
1947static void ata_timing_quantize(const struct ata_timing *t, struct ata_timing *q, int T, int UT)
1948{
1949 q->setup = EZ(t->setup * 1000, T);
1950 q->act8b = EZ(t->act8b * 1000, T);
1951 q->rec8b = EZ(t->rec8b * 1000, T);
1952 q->cyc8b = EZ(t->cyc8b * 1000, T);
1953 q->active = EZ(t->active * 1000, T);
1954 q->recover = EZ(t->recover * 1000, T);
1955 q->cycle = EZ(t->cycle * 1000, T);
1956 q->udma = EZ(t->udma * 1000, UT);
1957}
1958
1959void ata_timing_merge(const struct ata_timing *a, const struct ata_timing *b,
1960 struct ata_timing *m, unsigned int what)
1961{
1962 if (what & ATA_TIMING_SETUP ) m->setup = max(a->setup, b->setup);
1963 if (what & ATA_TIMING_ACT8B ) m->act8b = max(a->act8b, b->act8b);
1964 if (what & ATA_TIMING_REC8B ) m->rec8b = max(a->rec8b, b->rec8b);
1965 if (what & ATA_TIMING_CYC8B ) m->cyc8b = max(a->cyc8b, b->cyc8b);
1966 if (what & ATA_TIMING_ACTIVE ) m->active = max(a->active, b->active);
1967 if (what & ATA_TIMING_RECOVER) m->recover = max(a->recover, b->recover);
1968 if (what & ATA_TIMING_CYCLE ) m->cycle = max(a->cycle, b->cycle);
1969 if (what & ATA_TIMING_UDMA ) m->udma = max(a->udma, b->udma);
1970}
1971
1972static const struct ata_timing* ata_timing_find_mode(unsigned short speed)
1973{
1974 const struct ata_timing *t;
1975
1976 for (t = ata_timing; t->mode != speed; t++)
Alan Cox91190752005-10-26 12:17:46 -04001977 if (t->mode == 0xFF)
Alan Cox452503f2005-10-21 19:01:32 -04001978 return NULL;
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05001979 return t;
Alan Cox452503f2005-10-21 19:01:32 -04001980}
1981
1982int ata_timing_compute(struct ata_device *adev, unsigned short speed,
1983 struct ata_timing *t, int T, int UT)
1984{
1985 const struct ata_timing *s;
1986 struct ata_timing p;
1987
1988 /*
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05001989 * Find the mode.
Albert Lee75b1f2f2005-11-16 17:06:18 +08001990 */
Alan Cox452503f2005-10-21 19:01:32 -04001991
1992 if (!(s = ata_timing_find_mode(speed)))
1993 return -EINVAL;
1994
Albert Lee75b1f2f2005-11-16 17:06:18 +08001995 memcpy(t, s, sizeof(*s));
1996
Alan Cox452503f2005-10-21 19:01:32 -04001997 /*
1998 * If the drive is an EIDE drive, it can tell us it needs extended
1999 * PIO/MW_DMA cycle timing.
2000 */
2001
2002 if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE drive */
2003 memset(&p, 0, sizeof(p));
2004 if(speed >= XFER_PIO_0 && speed <= XFER_SW_DMA_0) {
2005 if (speed <= XFER_PIO_2) p.cycle = p.cyc8b = adev->id[ATA_ID_EIDE_PIO];
2006 else p.cycle = p.cyc8b = adev->id[ATA_ID_EIDE_PIO_IORDY];
2007 } else if(speed >= XFER_MW_DMA_0 && speed <= XFER_MW_DMA_2) {
2008 p.cycle = adev->id[ATA_ID_EIDE_DMA_MIN];
2009 }
2010 ata_timing_merge(&p, t, t, ATA_TIMING_CYCLE | ATA_TIMING_CYC8B);
2011 }
2012
2013 /*
2014 * Convert the timing to bus clock counts.
2015 */
2016
Albert Lee75b1f2f2005-11-16 17:06:18 +08002017 ata_timing_quantize(t, t, T, UT);
Alan Cox452503f2005-10-21 19:01:32 -04002018
2019 /*
Randy Dunlapc893a3a2006-01-28 13:15:32 -05002020 * Even in DMA/UDMA modes we still use PIO access for IDENTIFY,
2021 * S.M.A.R.T * and some other commands. We have to ensure that the
2022 * DMA cycle timing is slower/equal than the fastest PIO timing.
Alan Cox452503f2005-10-21 19:01:32 -04002023 */
2024
2025 if (speed > XFER_PIO_4) {
2026 ata_timing_compute(adev, adev->pio_mode, &p, T, UT);
2027 ata_timing_merge(&p, t, t, ATA_TIMING_ALL);
2028 }
2029
2030 /*
Randy Dunlapc893a3a2006-01-28 13:15:32 -05002031 * Lengthen active & recovery time so that cycle time is correct.
Alan Cox452503f2005-10-21 19:01:32 -04002032 */
2033
2034 if (t->act8b + t->rec8b < t->cyc8b) {
2035 t->act8b += (t->cyc8b - (t->act8b + t->rec8b)) / 2;
2036 t->rec8b = t->cyc8b - t->act8b;
2037 }
2038
2039 if (t->active + t->recover < t->cycle) {
2040 t->active += (t->cycle - (t->active + t->recover)) / 2;
2041 t->recover = t->cycle - t->active;
2042 }
2043
2044 return 0;
2045}
2046
Tejun Heocf176e12006-04-02 17:54:46 +09002047/**
2048 * ata_down_xfermask_limit - adjust dev xfer masks downward
Tejun Heocf176e12006-04-02 17:54:46 +09002049 * @dev: Device to adjust xfer masks
2050 * @force_pio0: Force PIO0
2051 *
2052 * Adjust xfer masks of @dev downward. Note that this function
2053 * does not apply the change. Invoking ata_set_mode() afterwards
2054 * will apply the limit.
2055 *
2056 * LOCKING:
2057 * Inherited from caller.
2058 *
2059 * RETURNS:
2060 * 0 on success, negative errno on failure
2061 */
Tejun Heo3373efd2006-05-15 20:57:53 +09002062int ata_down_xfermask_limit(struct ata_device *dev, int force_pio0)
Tejun Heocf176e12006-04-02 17:54:46 +09002063{
2064 unsigned long xfer_mask;
2065 int highbit;
2066
2067 xfer_mask = ata_pack_xfermask(dev->pio_mask, dev->mwdma_mask,
2068 dev->udma_mask);
2069
2070 if (!xfer_mask)
2071 goto fail;
2072 /* don't gear down to MWDMA from UDMA, go directly to PIO */
2073 if (xfer_mask & ATA_MASK_UDMA)
2074 xfer_mask &= ~ATA_MASK_MWDMA;
2075
2076 highbit = fls(xfer_mask) - 1;
2077 xfer_mask &= ~(1 << highbit);
2078 if (force_pio0)
2079 xfer_mask &= 1 << ATA_SHIFT_PIO;
2080 if (!xfer_mask)
2081 goto fail;
2082
2083 ata_unpack_xfermask(xfer_mask, &dev->pio_mask, &dev->mwdma_mask,
2084 &dev->udma_mask);
2085
Tejun Heof15a1da2006-05-15 20:57:56 +09002086 ata_dev_printk(dev, KERN_WARNING, "limiting speed to %s\n",
2087 ata_mode_string(xfer_mask));
Tejun Heocf176e12006-04-02 17:54:46 +09002088
2089 return 0;
2090
2091 fail:
2092 return -EINVAL;
2093}
2094
Tejun Heo3373efd2006-05-15 20:57:53 +09002095static int ata_dev_set_mode(struct ata_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002096{
Tejun Heo83206a22006-03-24 15:25:31 +09002097 unsigned int err_mask;
2098 int rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002099
Tejun Heoe8384602006-04-02 18:51:53 +09002100 dev->flags &= ~ATA_DFLAG_PIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002101 if (dev->xfer_shift == ATA_SHIFT_PIO)
2102 dev->flags |= ATA_DFLAG_PIO;
2103
Tejun Heo3373efd2006-05-15 20:57:53 +09002104 err_mask = ata_dev_set_xfermode(dev);
Tejun Heo83206a22006-03-24 15:25:31 +09002105 if (err_mask) {
Tejun Heof15a1da2006-05-15 20:57:56 +09002106 ata_dev_printk(dev, KERN_ERR, "failed to set xfermode "
2107 "(err_mask=0x%x)\n", err_mask);
Tejun Heo83206a22006-03-24 15:25:31 +09002108 return -EIO;
2109 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002110
Tejun Heo3373efd2006-05-15 20:57:53 +09002111 rc = ata_dev_revalidate(dev, 0);
Tejun Heo5eb45c02006-04-02 18:51:52 +09002112 if (rc)
Tejun Heo83206a22006-03-24 15:25:31 +09002113 return rc;
Tejun Heo48a8a142006-03-05 17:55:58 +09002114
Tejun Heo23e71c32006-03-06 04:31:57 +09002115 DPRINTK("xfer_shift=%u, xfer_mode=0x%x\n",
2116 dev->xfer_shift, (int)dev->xfer_mode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002117
Tejun Heof15a1da2006-05-15 20:57:56 +09002118 ata_dev_printk(dev, KERN_INFO, "configured for %s\n",
2119 ata_mode_string(ata_xfer_mode2mask(dev->xfer_mode)));
Tejun Heo83206a22006-03-24 15:25:31 +09002120 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002121}
2122
Linus Torvalds1da177e2005-04-16 15:20:36 -07002123/**
2124 * ata_set_mode - Program timings and issue SET FEATURES - XFER
2125 * @ap: port on which timings will be programmed
Tejun Heoe82cbdb2006-04-01 01:38:18 +09002126 * @r_failed_dev: out paramter for failed device
Linus Torvalds1da177e2005-04-16 15:20:36 -07002127 *
Tejun Heoe82cbdb2006-04-01 01:38:18 +09002128 * Set ATA device disk transfer mode (PIO3, UDMA6, etc.). If
2129 * ata_set_mode() fails, pointer to the failing device is
2130 * returned in @r_failed_dev.
Jeff Garzik780a87f2005-05-30 15:41:05 -04002131 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07002132 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04002133 * PCI/etc. bus probe sem.
Tejun Heoe82cbdb2006-04-01 01:38:18 +09002134 *
2135 * RETURNS:
2136 * 0 on success, negative errno otherwise
Linus Torvalds1da177e2005-04-16 15:20:36 -07002137 */
Tejun Heo1ad8e7f2006-04-02 18:51:53 +09002138int ata_set_mode(struct ata_port *ap, struct ata_device **r_failed_dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002139{
Tejun Heoe8e06192006-04-01 01:38:18 +09002140 struct ata_device *dev;
Tejun Heoe82cbdb2006-04-01 01:38:18 +09002141 int i, rc = 0, used_dma = 0, found = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002142
Tejun Heo3adcebb2006-05-15 20:57:37 +09002143 /* has private set_mode? */
2144 if (ap->ops->set_mode) {
2145 /* FIXME: make ->set_mode handle no device case and
2146 * return error code and failing device on failure.
2147 */
2148 for (i = 0; i < ATA_MAX_DEVICES; i++) {
Tejun Heo02670bf2006-07-03 16:07:26 +09002149 if (ata_dev_ready(&ap->device[i])) {
Tejun Heo3adcebb2006-05-15 20:57:37 +09002150 ap->ops->set_mode(ap);
2151 break;
2152 }
2153 }
2154 return 0;
2155 }
2156
Tejun Heoa6d5a512006-03-06 04:31:57 +09002157 /* step 1: calculate xfer_mask */
2158 for (i = 0; i < ATA_MAX_DEVICES; i++) {
Tejun Heoacf356b2006-03-24 14:07:50 +09002159 unsigned int pio_mask, dma_mask;
Tejun Heoa6d5a512006-03-06 04:31:57 +09002160
Tejun Heoe8e06192006-04-01 01:38:18 +09002161 dev = &ap->device[i];
2162
Tejun Heoe1211e32006-04-01 01:38:18 +09002163 if (!ata_dev_enabled(dev))
Tejun Heoa6d5a512006-03-06 04:31:57 +09002164 continue;
2165
Tejun Heo3373efd2006-05-15 20:57:53 +09002166 ata_dev_xfermask(dev);
Tejun Heoa6d5a512006-03-06 04:31:57 +09002167
Tejun Heoacf356b2006-03-24 14:07:50 +09002168 pio_mask = ata_pack_xfermask(dev->pio_mask, 0, 0);
2169 dma_mask = ata_pack_xfermask(0, dev->mwdma_mask, dev->udma_mask);
2170 dev->pio_mode = ata_xfer_mask2mode(pio_mask);
2171 dev->dma_mode = ata_xfer_mask2mode(dma_mask);
Alan Cox5444a6f2006-03-27 18:58:20 +01002172
Tejun Heo4f659772006-04-01 01:38:18 +09002173 found = 1;
Alan Cox5444a6f2006-03-27 18:58:20 +01002174 if (dev->dma_mode)
2175 used_dma = 1;
Tejun Heoa6d5a512006-03-06 04:31:57 +09002176 }
Tejun Heo4f659772006-04-01 01:38:18 +09002177 if (!found)
Tejun Heoe82cbdb2006-04-01 01:38:18 +09002178 goto out;
Tejun Heoa6d5a512006-03-06 04:31:57 +09002179
2180 /* step 2: always set host PIO timings */
Tejun Heoe8e06192006-04-01 01:38:18 +09002181 for (i = 0; i < ATA_MAX_DEVICES; i++) {
2182 dev = &ap->device[i];
2183 if (!ata_dev_enabled(dev))
2184 continue;
2185
2186 if (!dev->pio_mode) {
Tejun Heof15a1da2006-05-15 20:57:56 +09002187 ata_dev_printk(dev, KERN_WARNING, "no PIO support\n");
Tejun Heoe8e06192006-04-01 01:38:18 +09002188 rc = -EINVAL;
Tejun Heoe82cbdb2006-04-01 01:38:18 +09002189 goto out;
Tejun Heoe8e06192006-04-01 01:38:18 +09002190 }
2191
2192 dev->xfer_mode = dev->pio_mode;
2193 dev->xfer_shift = ATA_SHIFT_PIO;
2194 if (ap->ops->set_piomode)
2195 ap->ops->set_piomode(ap, dev);
2196 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002197
Tejun Heoa6d5a512006-03-06 04:31:57 +09002198 /* step 3: set host DMA timings */
Tejun Heoe8e06192006-04-01 01:38:18 +09002199 for (i = 0; i < ATA_MAX_DEVICES; i++) {
2200 dev = &ap->device[i];
2201
2202 if (!ata_dev_enabled(dev) || !dev->dma_mode)
2203 continue;
2204
2205 dev->xfer_mode = dev->dma_mode;
2206 dev->xfer_shift = ata_xfer_mode2shift(dev->dma_mode);
2207 if (ap->ops->set_dmamode)
2208 ap->ops->set_dmamode(ap, dev);
2209 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002210
2211 /* step 4: update devices' xfer mode */
Tejun Heo83206a22006-03-24 15:25:31 +09002212 for (i = 0; i < ATA_MAX_DEVICES; i++) {
Tejun Heoe8e06192006-04-01 01:38:18 +09002213 dev = &ap->device[i];
Linus Torvalds1da177e2005-04-16 15:20:36 -07002214
Tejun Heo02670bf2006-07-03 16:07:26 +09002215 /* don't udpate suspended devices' xfer mode */
2216 if (!ata_dev_ready(dev))
Tejun Heo83206a22006-03-24 15:25:31 +09002217 continue;
2218
Tejun Heo3373efd2006-05-15 20:57:53 +09002219 rc = ata_dev_set_mode(dev);
Tejun Heo5bbc53f2006-04-01 01:38:17 +09002220 if (rc)
Tejun Heoe82cbdb2006-04-01 01:38:18 +09002221 goto out;
Tejun Heo83206a22006-03-24 15:25:31 +09002222 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002223
Tejun Heoe8e06192006-04-01 01:38:18 +09002224 /* Record simplex status. If we selected DMA then the other
2225 * host channels are not permitted to do so.
Alan Cox5444a6f2006-03-27 18:58:20 +01002226 */
Alan Cox5444a6f2006-03-27 18:58:20 +01002227 if (used_dma && (ap->host_set->flags & ATA_HOST_SIMPLEX))
2228 ap->host_set->simplex_claimed = 1;
2229
Tejun Heoe8e06192006-04-01 01:38:18 +09002230 /* step5: chip specific finalisation */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002231 if (ap->ops->post_set_mode)
2232 ap->ops->post_set_mode(ap);
2233
Tejun Heoe82cbdb2006-04-01 01:38:18 +09002234 out:
2235 if (rc)
2236 *r_failed_dev = dev;
2237 return rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002238}
2239
2240/**
Jeff Garzik1fdffbc2006-02-09 05:15:27 -05002241 * ata_tf_to_host - issue ATA taskfile to host controller
2242 * @ap: port to which command is being issued
2243 * @tf: ATA taskfile register set
2244 *
2245 * Issues ATA taskfile register set to ATA host controller,
2246 * with proper synchronization with interrupt handler and
2247 * other threads.
2248 *
2249 * LOCKING:
2250 * spin_lock_irqsave(host_set lock)
2251 */
2252
2253static inline void ata_tf_to_host(struct ata_port *ap,
2254 const struct ata_taskfile *tf)
2255{
2256 ap->ops->tf_load(ap, tf);
2257 ap->ops->exec_command(ap, tf);
2258}
2259
2260/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07002261 * ata_busy_sleep - sleep until BSY clears, or timeout
2262 * @ap: port containing status register to be polled
2263 * @tmout_pat: impatience timeout
2264 * @tmout: overall timeout
2265 *
Jeff Garzik780a87f2005-05-30 15:41:05 -04002266 * Sleep until ATA Status register bit BSY clears,
2267 * or a timeout occurs.
2268 *
2269 * LOCKING: None.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002270 */
2271
Tejun Heo6f8b9952006-01-24 17:05:21 +09002272unsigned int ata_busy_sleep (struct ata_port *ap,
2273 unsigned long tmout_pat, unsigned long tmout)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002274{
2275 unsigned long timer_start, timeout;
2276 u8 status;
2277
2278 status = ata_busy_wait(ap, ATA_BUSY, 300);
2279 timer_start = jiffies;
2280 timeout = timer_start + tmout_pat;
2281 while ((status & ATA_BUSY) && (time_before(jiffies, timeout))) {
2282 msleep(50);
2283 status = ata_busy_wait(ap, ATA_BUSY, 3);
2284 }
2285
2286 if (status & ATA_BUSY)
Tejun Heof15a1da2006-05-15 20:57:56 +09002287 ata_port_printk(ap, KERN_WARNING,
2288 "port is slow to respond, please be patient\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07002289
2290 timeout = timer_start + tmout;
2291 while ((status & ATA_BUSY) && (time_before(jiffies, timeout))) {
2292 msleep(50);
2293 status = ata_chk_status(ap);
2294 }
2295
2296 if (status & ATA_BUSY) {
Tejun Heof15a1da2006-05-15 20:57:56 +09002297 ata_port_printk(ap, KERN_ERR, "port failed to respond "
2298 "(%lu secs)\n", tmout / HZ);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002299 return 1;
2300 }
2301
2302 return 0;
2303}
2304
2305static void ata_bus_post_reset(struct ata_port *ap, unsigned int devmask)
2306{
2307 struct ata_ioports *ioaddr = &ap->ioaddr;
2308 unsigned int dev0 = devmask & (1 << 0);
2309 unsigned int dev1 = devmask & (1 << 1);
2310 unsigned long timeout;
2311
2312 /* if device 0 was found in ata_devchk, wait for its
2313 * BSY bit to clear
2314 */
2315 if (dev0)
2316 ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT);
2317
2318 /* if device 1 was found in ata_devchk, wait for
2319 * register access, then wait for BSY to clear
2320 */
2321 timeout = jiffies + ATA_TMOUT_BOOT;
2322 while (dev1) {
2323 u8 nsect, lbal;
2324
2325 ap->ops->dev_select(ap, 1);
2326 if (ap->flags & ATA_FLAG_MMIO) {
2327 nsect = readb((void __iomem *) ioaddr->nsect_addr);
2328 lbal = readb((void __iomem *) ioaddr->lbal_addr);
2329 } else {
2330 nsect = inb(ioaddr->nsect_addr);
2331 lbal = inb(ioaddr->lbal_addr);
2332 }
2333 if ((nsect == 1) && (lbal == 1))
2334 break;
2335 if (time_after(jiffies, timeout)) {
2336 dev1 = 0;
2337 break;
2338 }
2339 msleep(50); /* give drive a breather */
2340 }
2341 if (dev1)
2342 ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT);
2343
2344 /* is all this really necessary? */
2345 ap->ops->dev_select(ap, 0);
2346 if (dev1)
2347 ap->ops->dev_select(ap, 1);
2348 if (dev0)
2349 ap->ops->dev_select(ap, 0);
2350}
2351
Linus Torvalds1da177e2005-04-16 15:20:36 -07002352static unsigned int ata_bus_softreset(struct ata_port *ap,
2353 unsigned int devmask)
2354{
2355 struct ata_ioports *ioaddr = &ap->ioaddr;
2356
2357 DPRINTK("ata%u: bus reset via SRST\n", ap->id);
2358
2359 /* software reset. causes dev0 to be selected */
2360 if (ap->flags & ATA_FLAG_MMIO) {
2361 writeb(ap->ctl, (void __iomem *) ioaddr->ctl_addr);
2362 udelay(20); /* FIXME: flush */
2363 writeb(ap->ctl | ATA_SRST, (void __iomem *) ioaddr->ctl_addr);
2364 udelay(20); /* FIXME: flush */
2365 writeb(ap->ctl, (void __iomem *) ioaddr->ctl_addr);
2366 } else {
2367 outb(ap->ctl, ioaddr->ctl_addr);
2368 udelay(10);
2369 outb(ap->ctl | ATA_SRST, ioaddr->ctl_addr);
2370 udelay(10);
2371 outb(ap->ctl, ioaddr->ctl_addr);
2372 }
2373
2374 /* spec mandates ">= 2ms" before checking status.
2375 * We wait 150ms, because that was the magic delay used for
2376 * ATAPI devices in Hale Landis's ATADRVR, for the period of time
2377 * between when the ATA command register is written, and then
2378 * status is checked. Because waiting for "a while" before
2379 * checking status is fine, post SRST, we perform this magic
2380 * delay here as well.
Alan Cox09c7ad72006-03-22 15:52:40 +00002381 *
2382 * Old drivers/ide uses the 2mS rule and then waits for ready
Linus Torvalds1da177e2005-04-16 15:20:36 -07002383 */
2384 msleep(150);
2385
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05002386 /* Before we perform post reset processing we want to see if
Tejun Heo298a41c2006-03-25 02:58:13 +09002387 * the bus shows 0xFF because the odd clown forgets the D7
2388 * pulldown resistor.
2389 */
Tejun Heo987d2f02006-04-11 22:16:45 +09002390 if (ata_check_status(ap) == 0xFF) {
Tejun Heof15a1da2006-05-15 20:57:56 +09002391 ata_port_printk(ap, KERN_ERR, "SRST failed (status 0xFF)\n");
Tejun Heo298a41c2006-03-25 02:58:13 +09002392 return AC_ERR_OTHER;
Tejun Heo987d2f02006-04-11 22:16:45 +09002393 }
Alan Cox09c7ad72006-03-22 15:52:40 +00002394
Linus Torvalds1da177e2005-04-16 15:20:36 -07002395 ata_bus_post_reset(ap, devmask);
2396
2397 return 0;
2398}
2399
2400/**
2401 * ata_bus_reset - reset host port and associated ATA channel
2402 * @ap: port to reset
2403 *
2404 * This is typically the first time we actually start issuing
2405 * commands to the ATA channel. We wait for BSY to clear, then
2406 * issue EXECUTE DEVICE DIAGNOSTIC command, polling for its
2407 * result. Determine what devices, if any, are on the channel
2408 * by looking at the device 0/1 error register. Look at the signature
2409 * stored in each device's taskfile registers, to determine if
2410 * the device is ATA or ATAPI.
2411 *
2412 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04002413 * PCI/etc. bus probe sem.
2414 * Obtains host_set lock.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002415 *
2416 * SIDE EFFECTS:
Tejun Heo198e0fe2006-04-02 18:51:52 +09002417 * Sets ATA_FLAG_DISABLED if bus reset fails.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002418 */
2419
2420void ata_bus_reset(struct ata_port *ap)
2421{
2422 struct ata_ioports *ioaddr = &ap->ioaddr;
2423 unsigned int slave_possible = ap->flags & ATA_FLAG_SLAVE_POSS;
2424 u8 err;
Tejun Heoaec5c3c2006-03-25 01:33:34 +09002425 unsigned int dev0, dev1 = 0, devmask = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002426
2427 DPRINTK("ENTER, host %u, port %u\n", ap->id, ap->port_no);
2428
2429 /* determine if device 0/1 are present */
2430 if (ap->flags & ATA_FLAG_SATA_RESET)
2431 dev0 = 1;
2432 else {
2433 dev0 = ata_devchk(ap, 0);
2434 if (slave_possible)
2435 dev1 = ata_devchk(ap, 1);
2436 }
2437
2438 if (dev0)
2439 devmask |= (1 << 0);
2440 if (dev1)
2441 devmask |= (1 << 1);
2442
2443 /* select device 0 again */
2444 ap->ops->dev_select(ap, 0);
2445
2446 /* issue bus reset */
2447 if (ap->flags & ATA_FLAG_SRST)
Tejun Heoaec5c3c2006-03-25 01:33:34 +09002448 if (ata_bus_softreset(ap, devmask))
2449 goto err_out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002450
2451 /*
2452 * determine by signature whether we have ATA or ATAPI devices
2453 */
Tejun Heob4dc7622006-01-24 17:05:22 +09002454 ap->device[0].class = ata_dev_try_classify(ap, 0, &err);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002455 if ((slave_possible) && (err != 0x81))
Tejun Heob4dc7622006-01-24 17:05:22 +09002456 ap->device[1].class = ata_dev_try_classify(ap, 1, &err);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002457
2458 /* re-enable interrupts */
2459 if (ap->ioaddr.ctl_addr) /* FIXME: hack. create a hook instead */
2460 ata_irq_on(ap);
2461
2462 /* is double-select really necessary? */
2463 if (ap->device[1].class != ATA_DEV_NONE)
2464 ap->ops->dev_select(ap, 1);
2465 if (ap->device[0].class != ATA_DEV_NONE)
2466 ap->ops->dev_select(ap, 0);
2467
2468 /* if no devices were detected, disable this port */
2469 if ((ap->device[0].class == ATA_DEV_NONE) &&
2470 (ap->device[1].class == ATA_DEV_NONE))
2471 goto err_out;
2472
2473 if (ap->flags & (ATA_FLAG_SATA_RESET | ATA_FLAG_SRST)) {
2474 /* set up device control for ATA_FLAG_SATA_RESET */
2475 if (ap->flags & ATA_FLAG_MMIO)
2476 writeb(ap->ctl, (void __iomem *) ioaddr->ctl_addr);
2477 else
2478 outb(ap->ctl, ioaddr->ctl_addr);
2479 }
2480
2481 DPRINTK("EXIT\n");
2482 return;
2483
2484err_out:
Tejun Heof15a1da2006-05-15 20:57:56 +09002485 ata_port_printk(ap, KERN_ERR, "disabling port\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07002486 ap->ops->port_disable(ap);
2487
2488 DPRINTK("EXIT\n");
2489}
2490
Tejun Heod7bb4cc2006-05-31 18:27:46 +09002491/**
2492 * sata_phy_debounce - debounce SATA phy status
2493 * @ap: ATA port to debounce SATA phy status for
2494 * @params: timing parameters { interval, duratinon, timeout } in msec
2495 *
2496 * Make sure SStatus of @ap reaches stable state, determined by
2497 * holding the same value where DET is not 1 for @duration polled
2498 * every @interval, before @timeout. Timeout constraints the
2499 * beginning of the stable state. Because, after hot unplugging,
2500 * DET gets stuck at 1 on some controllers, this functions waits
2501 * until timeout then returns 0 if DET is stable at 1.
2502 *
2503 * LOCKING:
2504 * Kernel thread context (may sleep)
2505 *
2506 * RETURNS:
2507 * 0 on success, -errno on failure.
2508 */
2509int sata_phy_debounce(struct ata_port *ap, const unsigned long *params)
Tejun Heo7a7921e2006-02-02 18:20:00 +09002510{
Tejun Heod7bb4cc2006-05-31 18:27:46 +09002511 unsigned long interval_msec = params[0];
2512 unsigned long duration = params[1] * HZ / 1000;
2513 unsigned long timeout = jiffies + params[2] * HZ / 1000;
2514 unsigned long last_jiffies;
2515 u32 last, cur;
2516 int rc;
2517
2518 if ((rc = sata_scr_read(ap, SCR_STATUS, &cur)))
2519 return rc;
2520 cur &= 0xf;
2521
2522 last = cur;
2523 last_jiffies = jiffies;
2524
2525 while (1) {
2526 msleep(interval_msec);
2527 if ((rc = sata_scr_read(ap, SCR_STATUS, &cur)))
2528 return rc;
2529 cur &= 0xf;
2530
2531 /* DET stable? */
2532 if (cur == last) {
2533 if (cur == 1 && time_before(jiffies, timeout))
2534 continue;
2535 if (time_after(jiffies, last_jiffies + duration))
2536 return 0;
2537 continue;
2538 }
2539
2540 /* unstable, start over */
2541 last = cur;
2542 last_jiffies = jiffies;
2543
2544 /* check timeout */
2545 if (time_after(jiffies, timeout))
2546 return -EBUSY;
2547 }
2548}
2549
2550/**
2551 * sata_phy_resume - resume SATA phy
2552 * @ap: ATA port to resume SATA phy for
2553 * @params: timing parameters { interval, duratinon, timeout } in msec
2554 *
2555 * Resume SATA phy of @ap and debounce it.
2556 *
2557 * LOCKING:
2558 * Kernel thread context (may sleep)
2559 *
2560 * RETURNS:
2561 * 0 on success, -errno on failure.
2562 */
2563int sata_phy_resume(struct ata_port *ap, const unsigned long *params)
2564{
2565 u32 scontrol;
Tejun Heo81952c52006-05-15 20:57:47 +09002566 int rc;
Tejun Heo7a7921e2006-02-02 18:20:00 +09002567
Tejun Heo81952c52006-05-15 20:57:47 +09002568 if ((rc = sata_scr_read(ap, SCR_CONTROL, &scontrol)))
2569 return rc;
2570
Tejun Heo852ee162006-04-01 01:38:18 +09002571 scontrol = (scontrol & 0x0f0) | 0x300;
Tejun Heo81952c52006-05-15 20:57:47 +09002572
2573 if ((rc = sata_scr_write(ap, SCR_CONTROL, scontrol)))
2574 return rc;
Tejun Heo7a7921e2006-02-02 18:20:00 +09002575
Tejun Heod7bb4cc2006-05-31 18:27:46 +09002576 /* Some PHYs react badly if SStatus is pounded immediately
2577 * after resuming. Delay 200ms before debouncing.
2578 */
2579 msleep(200);
Tejun Heo7a7921e2006-02-02 18:20:00 +09002580
Tejun Heod7bb4cc2006-05-31 18:27:46 +09002581 return sata_phy_debounce(ap, params);
Tejun Heo7a7921e2006-02-02 18:20:00 +09002582}
2583
Tejun Heof5914a42006-05-31 18:27:48 +09002584static void ata_wait_spinup(struct ata_port *ap)
2585{
2586 struct ata_eh_context *ehc = &ap->eh_context;
2587 unsigned long end, secs;
2588 int rc;
2589
2590 /* first, debounce phy if SATA */
2591 if (ap->cbl == ATA_CBL_SATA) {
Tejun Heoe9c83912006-07-03 16:07:26 +09002592 rc = sata_phy_debounce(ap, sata_deb_timing_hotplug);
Tejun Heof5914a42006-05-31 18:27:48 +09002593
2594 /* if debounced successfully and offline, no need to wait */
2595 if ((rc == 0 || rc == -EOPNOTSUPP) && ata_port_offline(ap))
2596 return;
2597 }
2598
2599 /* okay, let's give the drive time to spin up */
2600 end = ehc->i.hotplug_timestamp + ATA_SPINUP_WAIT * HZ / 1000;
2601 secs = ((end - jiffies) + HZ - 1) / HZ;
2602
2603 if (time_after(jiffies, end))
2604 return;
2605
2606 if (secs > 5)
2607 ata_port_printk(ap, KERN_INFO, "waiting for device to spin up "
2608 "(%lu secs)\n", secs);
2609
2610 schedule_timeout_uninterruptible(end - jiffies);
2611}
2612
2613/**
2614 * ata_std_prereset - prepare for reset
2615 * @ap: ATA port to be reset
2616 *
2617 * @ap is about to be reset. Initialize it.
2618 *
2619 * LOCKING:
2620 * Kernel thread context (may sleep)
2621 *
2622 * RETURNS:
2623 * 0 on success, -errno otherwise.
2624 */
2625int ata_std_prereset(struct ata_port *ap)
2626{
2627 struct ata_eh_context *ehc = &ap->eh_context;
Tejun Heoe9c83912006-07-03 16:07:26 +09002628 const unsigned long *timing = sata_ehc_deb_timing(ehc);
Tejun Heof5914a42006-05-31 18:27:48 +09002629 int rc;
2630
Tejun Heo28324302006-07-03 16:07:26 +09002631 /* handle link resume & hotplug spinup */
2632 if ((ehc->i.flags & ATA_EHI_RESUME_LINK) &&
2633 (ap->flags & ATA_FLAG_HRST_TO_RESUME))
2634 ehc->i.action |= ATA_EH_HARDRESET;
2635
2636 if ((ehc->i.flags & ATA_EHI_HOTPLUGGED) &&
2637 (ap->flags & ATA_FLAG_SKIP_D2H_BSY))
2638 ata_wait_spinup(ap);
Tejun Heof5914a42006-05-31 18:27:48 +09002639
2640 /* if we're about to do hardreset, nothing more to do */
2641 if (ehc->i.action & ATA_EH_HARDRESET)
2642 return 0;
2643
2644 /* if SATA, resume phy */
2645 if (ap->cbl == ATA_CBL_SATA) {
Tejun Heof5914a42006-05-31 18:27:48 +09002646 rc = sata_phy_resume(ap, timing);
2647 if (rc && rc != -EOPNOTSUPP) {
2648 /* phy resume failed */
2649 ata_port_printk(ap, KERN_WARNING, "failed to resume "
2650 "link for reset (errno=%d)\n", rc);
2651 return rc;
2652 }
2653 }
2654
2655 /* Wait for !BSY if the controller can wait for the first D2H
2656 * Reg FIS and we don't know that no device is attached.
2657 */
2658 if (!(ap->flags & ATA_FLAG_SKIP_D2H_BSY) && !ata_port_offline(ap))
2659 ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT);
2660
2661 return 0;
2662}
2663
Tejun Heoc2bd5802006-01-24 17:05:22 +09002664/**
2665 * ata_std_softreset - reset host port via ATA SRST
2666 * @ap: port to reset
Tejun Heoc2bd5802006-01-24 17:05:22 +09002667 * @classes: resulting classes of attached devices
2668 *
Tejun Heo52783c52006-05-31 18:28:22 +09002669 * Reset host port using ATA SRST.
Tejun Heoc2bd5802006-01-24 17:05:22 +09002670 *
2671 * LOCKING:
2672 * Kernel thread context (may sleep)
2673 *
2674 * RETURNS:
2675 * 0 on success, -errno otherwise.
2676 */
Tejun Heo2bf2cb22006-04-11 22:16:45 +09002677int ata_std_softreset(struct ata_port *ap, unsigned int *classes)
Tejun Heoc2bd5802006-01-24 17:05:22 +09002678{
2679 unsigned int slave_possible = ap->flags & ATA_FLAG_SLAVE_POSS;
2680 unsigned int devmask = 0, err_mask;
2681 u8 err;
2682
2683 DPRINTK("ENTER\n");
2684
Tejun Heo81952c52006-05-15 20:57:47 +09002685 if (ata_port_offline(ap)) {
Tejun Heo3a397462006-02-10 23:58:48 +09002686 classes[0] = ATA_DEV_NONE;
2687 goto out;
2688 }
2689
Tejun Heoc2bd5802006-01-24 17:05:22 +09002690 /* determine if device 0/1 are present */
2691 if (ata_devchk(ap, 0))
2692 devmask |= (1 << 0);
2693 if (slave_possible && ata_devchk(ap, 1))
2694 devmask |= (1 << 1);
2695
Tejun Heoc2bd5802006-01-24 17:05:22 +09002696 /* select device 0 again */
2697 ap->ops->dev_select(ap, 0);
2698
2699 /* issue bus reset */
2700 DPRINTK("about to softreset, devmask=%x\n", devmask);
2701 err_mask = ata_bus_softreset(ap, devmask);
2702 if (err_mask) {
Tejun Heof15a1da2006-05-15 20:57:56 +09002703 ata_port_printk(ap, KERN_ERR, "SRST failed (err_mask=0x%x)\n",
2704 err_mask);
Tejun Heoc2bd5802006-01-24 17:05:22 +09002705 return -EIO;
2706 }
2707
2708 /* determine by signature whether we have ATA or ATAPI devices */
2709 classes[0] = ata_dev_try_classify(ap, 0, &err);
2710 if (slave_possible && err != 0x81)
2711 classes[1] = ata_dev_try_classify(ap, 1, &err);
2712
Tejun Heo3a397462006-02-10 23:58:48 +09002713 out:
Tejun Heoc2bd5802006-01-24 17:05:22 +09002714 DPRINTK("EXIT, classes[0]=%u [1]=%u\n", classes[0], classes[1]);
2715 return 0;
2716}
2717
2718/**
2719 * sata_std_hardreset - reset host port via SATA phy reset
2720 * @ap: port to reset
Tejun Heoc2bd5802006-01-24 17:05:22 +09002721 * @class: resulting class of attached device
2722 *
2723 * SATA phy-reset host port using DET bits of SControl register.
Tejun Heoc2bd5802006-01-24 17:05:22 +09002724 *
2725 * LOCKING:
2726 * Kernel thread context (may sleep)
2727 *
2728 * RETURNS:
2729 * 0 on success, -errno otherwise.
2730 */
Tejun Heo2bf2cb22006-04-11 22:16:45 +09002731int sata_std_hardreset(struct ata_port *ap, unsigned int *class)
Tejun Heoc2bd5802006-01-24 17:05:22 +09002732{
Tejun Heoe9c83912006-07-03 16:07:26 +09002733 struct ata_eh_context *ehc = &ap->eh_context;
2734 const unsigned long *timing = sata_ehc_deb_timing(ehc);
Tejun Heo852ee162006-04-01 01:38:18 +09002735 u32 scontrol;
Tejun Heo81952c52006-05-15 20:57:47 +09002736 int rc;
Tejun Heo852ee162006-04-01 01:38:18 +09002737
Tejun Heoc2bd5802006-01-24 17:05:22 +09002738 DPRINTK("ENTER\n");
2739
Tejun Heo3c567b72006-05-15 20:57:23 +09002740 if (sata_set_spd_needed(ap)) {
Tejun Heo1c3fae42006-04-02 20:53:28 +09002741 /* SATA spec says nothing about how to reconfigure
2742 * spd. To be on the safe side, turn off phy during
2743 * reconfiguration. This works for at least ICH7 AHCI
2744 * and Sil3124.
2745 */
Tejun Heo81952c52006-05-15 20:57:47 +09002746 if ((rc = sata_scr_read(ap, SCR_CONTROL, &scontrol)))
2747 return rc;
2748
Tejun Heo1c3fae42006-04-02 20:53:28 +09002749 scontrol = (scontrol & 0x0f0) | 0x302;
Tejun Heo81952c52006-05-15 20:57:47 +09002750
2751 if ((rc = sata_scr_write(ap, SCR_CONTROL, scontrol)))
2752 return rc;
Tejun Heo1c3fae42006-04-02 20:53:28 +09002753
Tejun Heo3c567b72006-05-15 20:57:23 +09002754 sata_set_spd(ap);
Tejun Heo1c3fae42006-04-02 20:53:28 +09002755 }
2756
2757 /* issue phy wake/reset */
Tejun Heo81952c52006-05-15 20:57:47 +09002758 if ((rc = sata_scr_read(ap, SCR_CONTROL, &scontrol)))
2759 return rc;
2760
Tejun Heo852ee162006-04-01 01:38:18 +09002761 scontrol = (scontrol & 0x0f0) | 0x301;
Tejun Heo81952c52006-05-15 20:57:47 +09002762
2763 if ((rc = sata_scr_write_flush(ap, SCR_CONTROL, scontrol)))
2764 return rc;
Tejun Heoc2bd5802006-01-24 17:05:22 +09002765
Tejun Heo1c3fae42006-04-02 20:53:28 +09002766 /* Couldn't find anything in SATA I/II specs, but AHCI-1.1
Tejun Heoc2bd5802006-01-24 17:05:22 +09002767 * 10.4.2 says at least 1 ms.
2768 */
2769 msleep(1);
2770
Tejun Heo1c3fae42006-04-02 20:53:28 +09002771 /* bring phy back */
Tejun Heoe9c83912006-07-03 16:07:26 +09002772 sata_phy_resume(ap, timing);
Tejun Heoc2bd5802006-01-24 17:05:22 +09002773
Tejun Heoc2bd5802006-01-24 17:05:22 +09002774 /* TODO: phy layer with polling, timeouts, etc. */
Tejun Heo81952c52006-05-15 20:57:47 +09002775 if (ata_port_offline(ap)) {
Tejun Heoc2bd5802006-01-24 17:05:22 +09002776 *class = ATA_DEV_NONE;
2777 DPRINTK("EXIT, link offline\n");
2778 return 0;
2779 }
2780
2781 if (ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT)) {
Tejun Heof15a1da2006-05-15 20:57:56 +09002782 ata_port_printk(ap, KERN_ERR,
2783 "COMRESET failed (device not ready)\n");
Tejun Heoc2bd5802006-01-24 17:05:22 +09002784 return -EIO;
2785 }
2786
Tejun Heo3a397462006-02-10 23:58:48 +09002787 ap->ops->dev_select(ap, 0); /* probably unnecessary */
2788
Tejun Heoc2bd5802006-01-24 17:05:22 +09002789 *class = ata_dev_try_classify(ap, 0, NULL);
2790
2791 DPRINTK("EXIT, class=%u\n", *class);
2792 return 0;
2793}
2794
2795/**
2796 * ata_std_postreset - standard postreset callback
2797 * @ap: the target ata_port
2798 * @classes: classes of attached devices
2799 *
2800 * This function is invoked after a successful reset. Note that
2801 * the device might have been reset more than once using
2802 * different reset methods before postreset is invoked.
Tejun Heoc2bd5802006-01-24 17:05:22 +09002803 *
Tejun Heoc2bd5802006-01-24 17:05:22 +09002804 * LOCKING:
2805 * Kernel thread context (may sleep)
2806 */
2807void ata_std_postreset(struct ata_port *ap, unsigned int *classes)
2808{
Tejun Heodc2b3512006-05-15 20:58:00 +09002809 u32 serror;
2810
Tejun Heoc2bd5802006-01-24 17:05:22 +09002811 DPRINTK("ENTER\n");
2812
Tejun Heoc2bd5802006-01-24 17:05:22 +09002813 /* print link status */
Tejun Heo81952c52006-05-15 20:57:47 +09002814 sata_print_link_status(ap);
Tejun Heoc2bd5802006-01-24 17:05:22 +09002815
Tejun Heodc2b3512006-05-15 20:58:00 +09002816 /* clear SError */
2817 if (sata_scr_read(ap, SCR_ERROR, &serror) == 0)
2818 sata_scr_write(ap, SCR_ERROR, serror);
2819
Tejun Heo3a397462006-02-10 23:58:48 +09002820 /* re-enable interrupts */
Tejun Heoe3180492006-05-15 20:58:09 +09002821 if (!ap->ops->error_handler) {
2822 /* FIXME: hack. create a hook instead */
2823 if (ap->ioaddr.ctl_addr)
2824 ata_irq_on(ap);
2825 }
Tejun Heoc2bd5802006-01-24 17:05:22 +09002826
2827 /* is double-select really necessary? */
2828 if (classes[0] != ATA_DEV_NONE)
2829 ap->ops->dev_select(ap, 1);
2830 if (classes[1] != ATA_DEV_NONE)
2831 ap->ops->dev_select(ap, 0);
2832
Tejun Heo3a397462006-02-10 23:58:48 +09002833 /* bail out if no device is present */
2834 if (classes[0] == ATA_DEV_NONE && classes[1] == ATA_DEV_NONE) {
2835 DPRINTK("EXIT, no device\n");
2836 return;
2837 }
2838
2839 /* set up device control */
2840 if (ap->ioaddr.ctl_addr) {
2841 if (ap->flags & ATA_FLAG_MMIO)
2842 writeb(ap->ctl, (void __iomem *) ap->ioaddr.ctl_addr);
2843 else
2844 outb(ap->ctl, ap->ioaddr.ctl_addr);
2845 }
Tejun Heoc2bd5802006-01-24 17:05:22 +09002846
2847 DPRINTK("EXIT\n");
2848}
2849
Tejun Heoa62c0fc2006-01-24 17:05:22 +09002850/**
Tejun Heo623a3122006-03-05 17:55:58 +09002851 * ata_dev_same_device - Determine whether new ID matches configured device
Tejun Heo623a3122006-03-05 17:55:58 +09002852 * @dev: device to compare against
2853 * @new_class: class of the new device
2854 * @new_id: IDENTIFY page of the new device
2855 *
2856 * Compare @new_class and @new_id against @dev and determine
2857 * whether @dev is the device indicated by @new_class and
2858 * @new_id.
2859 *
2860 * LOCKING:
2861 * None.
2862 *
2863 * RETURNS:
2864 * 1 if @dev matches @new_class and @new_id, 0 otherwise.
2865 */
Tejun Heo3373efd2006-05-15 20:57:53 +09002866static int ata_dev_same_device(struct ata_device *dev, unsigned int new_class,
2867 const u16 *new_id)
Tejun Heo623a3122006-03-05 17:55:58 +09002868{
2869 const u16 *old_id = dev->id;
2870 unsigned char model[2][41], serial[2][21];
2871 u64 new_n_sectors;
2872
2873 if (dev->class != new_class) {
Tejun Heof15a1da2006-05-15 20:57:56 +09002874 ata_dev_printk(dev, KERN_INFO, "class mismatch %d != %d\n",
2875 dev->class, new_class);
Tejun Heo623a3122006-03-05 17:55:58 +09002876 return 0;
2877 }
2878
2879 ata_id_c_string(old_id, model[0], ATA_ID_PROD_OFS, sizeof(model[0]));
2880 ata_id_c_string(new_id, model[1], ATA_ID_PROD_OFS, sizeof(model[1]));
2881 ata_id_c_string(old_id, serial[0], ATA_ID_SERNO_OFS, sizeof(serial[0]));
2882 ata_id_c_string(new_id, serial[1], ATA_ID_SERNO_OFS, sizeof(serial[1]));
2883 new_n_sectors = ata_id_n_sectors(new_id);
2884
2885 if (strcmp(model[0], model[1])) {
Tejun Heof15a1da2006-05-15 20:57:56 +09002886 ata_dev_printk(dev, KERN_INFO, "model number mismatch "
2887 "'%s' != '%s'\n", model[0], model[1]);
Tejun Heo623a3122006-03-05 17:55:58 +09002888 return 0;
2889 }
2890
2891 if (strcmp(serial[0], serial[1])) {
Tejun Heof15a1da2006-05-15 20:57:56 +09002892 ata_dev_printk(dev, KERN_INFO, "serial number mismatch "
2893 "'%s' != '%s'\n", serial[0], serial[1]);
Tejun Heo623a3122006-03-05 17:55:58 +09002894 return 0;
2895 }
2896
2897 if (dev->class == ATA_DEV_ATA && dev->n_sectors != new_n_sectors) {
Tejun Heof15a1da2006-05-15 20:57:56 +09002898 ata_dev_printk(dev, KERN_INFO, "n_sectors mismatch "
2899 "%llu != %llu\n",
2900 (unsigned long long)dev->n_sectors,
2901 (unsigned long long)new_n_sectors);
Tejun Heo623a3122006-03-05 17:55:58 +09002902 return 0;
2903 }
2904
2905 return 1;
2906}
2907
2908/**
2909 * ata_dev_revalidate - Revalidate ATA device
Tejun Heo623a3122006-03-05 17:55:58 +09002910 * @dev: device to revalidate
2911 * @post_reset: is this revalidation after reset?
2912 *
2913 * Re-read IDENTIFY page and make sure @dev is still attached to
2914 * the port.
2915 *
2916 * LOCKING:
2917 * Kernel thread context (may sleep)
2918 *
2919 * RETURNS:
2920 * 0 on success, negative errno otherwise
2921 */
Tejun Heo3373efd2006-05-15 20:57:53 +09002922int ata_dev_revalidate(struct ata_device *dev, int post_reset)
Tejun Heo623a3122006-03-05 17:55:58 +09002923{
Tejun Heo5eb45c02006-04-02 18:51:52 +09002924 unsigned int class = dev->class;
Tejun Heof15a1da2006-05-15 20:57:56 +09002925 u16 *id = (void *)dev->ap->sector_buf;
Tejun Heo623a3122006-03-05 17:55:58 +09002926 int rc;
2927
Tejun Heo5eb45c02006-04-02 18:51:52 +09002928 if (!ata_dev_enabled(dev)) {
2929 rc = -ENODEV;
2930 goto fail;
2931 }
Tejun Heo623a3122006-03-05 17:55:58 +09002932
Tejun Heofe635c72006-05-15 20:57:35 +09002933 /* read ID data */
Tejun Heo3373efd2006-05-15 20:57:53 +09002934 rc = ata_dev_read_id(dev, &class, post_reset, id);
Tejun Heo623a3122006-03-05 17:55:58 +09002935 if (rc)
2936 goto fail;
2937
2938 /* is the device still there? */
Tejun Heo3373efd2006-05-15 20:57:53 +09002939 if (!ata_dev_same_device(dev, class, id)) {
Tejun Heo623a3122006-03-05 17:55:58 +09002940 rc = -ENODEV;
2941 goto fail;
2942 }
2943
Tejun Heofe635c72006-05-15 20:57:35 +09002944 memcpy(dev->id, id, sizeof(id[0]) * ATA_ID_WORDS);
Tejun Heo623a3122006-03-05 17:55:58 +09002945
2946 /* configure device according to the new ID */
Tejun Heo3373efd2006-05-15 20:57:53 +09002947 rc = ata_dev_configure(dev, 0);
Tejun Heo5eb45c02006-04-02 18:51:52 +09002948 if (rc == 0)
2949 return 0;
Tejun Heo623a3122006-03-05 17:55:58 +09002950
2951 fail:
Tejun Heof15a1da2006-05-15 20:57:56 +09002952 ata_dev_printk(dev, KERN_ERR, "revalidation failed (errno=%d)\n", rc);
Tejun Heo623a3122006-03-05 17:55:58 +09002953 return rc;
2954}
2955
Arjan van de Ven98ac62d2005-11-28 10:06:23 +01002956static const char * const ata_dma_blacklist [] = {
Alan Coxf4b15fe2006-03-22 15:54:04 +00002957 "WDC AC11000H", NULL,
2958 "WDC AC22100H", NULL,
2959 "WDC AC32500H", NULL,
2960 "WDC AC33100H", NULL,
2961 "WDC AC31600H", NULL,
2962 "WDC AC32100H", "24.09P07",
2963 "WDC AC23200L", "21.10N21",
2964 "Compaq CRD-8241B", NULL,
2965 "CRD-8400B", NULL,
2966 "CRD-8480B", NULL,
2967 "CRD-8482B", NULL,
2968 "CRD-84", NULL,
2969 "SanDisk SDP3B", NULL,
2970 "SanDisk SDP3B-64", NULL,
2971 "SANYO CD-ROM CRD", NULL,
2972 "HITACHI CDR-8", NULL,
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05002973 "HITACHI CDR-8335", NULL,
Alan Coxf4b15fe2006-03-22 15:54:04 +00002974 "HITACHI CDR-8435", NULL,
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05002975 "Toshiba CD-ROM XM-6202B", NULL,
2976 "TOSHIBA CD-ROM XM-1702BC", NULL,
2977 "CD-532E-A", NULL,
2978 "E-IDE CD-ROM CR-840", NULL,
2979 "CD-ROM Drive/F5A", NULL,
2980 "WPI CDD-820", NULL,
Alan Coxf4b15fe2006-03-22 15:54:04 +00002981 "SAMSUNG CD-ROM SC-148C", NULL,
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05002982 "SAMSUNG CD-ROM SC", NULL,
Alan Coxf4b15fe2006-03-22 15:54:04 +00002983 "SanDisk SDP3B-64", NULL,
2984 "ATAPI CD-ROM DRIVE 40X MAXIMUM",NULL,
2985 "_NEC DV5800A", NULL,
2986 "SAMSUNG CD-ROM SN-124", "N001"
Linus Torvalds1da177e2005-04-16 15:20:36 -07002987};
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05002988
Alan Coxf4b15fe2006-03-22 15:54:04 +00002989static int ata_strim(char *s, size_t len)
2990{
2991 len = strnlen(s, len);
2992
2993 /* ATAPI specifies that empty space is blank-filled; remove blanks */
2994 while ((len > 0) && (s[len - 1] == ' ')) {
2995 len--;
2996 s[len] = 0;
2997 }
2998 return len;
2999}
Linus Torvalds1da177e2005-04-16 15:20:36 -07003000
Jeff Garzik057ace52005-10-22 14:27:05 -04003001static int ata_dma_blacklisted(const struct ata_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003002{
Alan Coxf4b15fe2006-03-22 15:54:04 +00003003 unsigned char model_num[40];
3004 unsigned char model_rev[16];
3005 unsigned int nlen, rlen;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003006 int i;
3007
Albert Lee3a778272006-06-22 13:00:25 +08003008 /* We don't support polling DMA.
3009 * DMA blacklist those ATAPI devices with CDB-intr (and use PIO)
3010 * if the LLDD handles only interrupts in the HSM_ST_LAST state.
3011 */
3012 if ((dev->ap->flags & ATA_FLAG_PIO_POLLING) &&
3013 (dev->flags & ATA_DFLAG_CDB_INTR))
3014 return 1;
3015
Alan Coxf4b15fe2006-03-22 15:54:04 +00003016 ata_id_string(dev->id, model_num, ATA_ID_PROD_OFS,
3017 sizeof(model_num));
3018 ata_id_string(dev->id, model_rev, ATA_ID_FW_REV_OFS,
3019 sizeof(model_rev));
3020 nlen = ata_strim(model_num, sizeof(model_num));
3021 rlen = ata_strim(model_rev, sizeof(model_rev));
Linus Torvalds1da177e2005-04-16 15:20:36 -07003022
Alan Coxf4b15fe2006-03-22 15:54:04 +00003023 for (i = 0; i < ARRAY_SIZE(ata_dma_blacklist); i += 2) {
3024 if (!strncmp(ata_dma_blacklist[i], model_num, nlen)) {
3025 if (ata_dma_blacklist[i+1] == NULL)
3026 return 1;
3027 if (!strncmp(ata_dma_blacklist[i], model_rev, rlen))
3028 return 1;
3029 }
3030 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003031 return 0;
3032}
3033
Tejun Heoa6d5a512006-03-06 04:31:57 +09003034/**
3035 * ata_dev_xfermask - Compute supported xfermask of the given device
Tejun Heoa6d5a512006-03-06 04:31:57 +09003036 * @dev: Device to compute xfermask for
3037 *
Tejun Heoacf356b2006-03-24 14:07:50 +09003038 * Compute supported xfermask of @dev and store it in
3039 * dev->*_mask. This function is responsible for applying all
3040 * known limits including host controller limits, device
3041 * blacklist, etc...
Tejun Heoa6d5a512006-03-06 04:31:57 +09003042 *
Tejun Heo600511e2006-03-25 11:14:07 +09003043 * FIXME: The current implementation limits all transfer modes to
3044 * the fastest of the lowested device on the port. This is not
Tejun Heo05c8e0a2006-03-25 14:28:57 +09003045 * required on most controllers.
Tejun Heo600511e2006-03-25 11:14:07 +09003046 *
Tejun Heoa6d5a512006-03-06 04:31:57 +09003047 * LOCKING:
3048 * None.
Tejun Heoa6d5a512006-03-06 04:31:57 +09003049 */
Tejun Heo3373efd2006-05-15 20:57:53 +09003050static void ata_dev_xfermask(struct ata_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003051{
Tejun Heo3373efd2006-05-15 20:57:53 +09003052 struct ata_port *ap = dev->ap;
Alan Cox5444a6f2006-03-27 18:58:20 +01003053 struct ata_host_set *hs = ap->host_set;
Tejun Heoa6d5a512006-03-06 04:31:57 +09003054 unsigned long xfer_mask;
3055 int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003056
Tejun Heo565083e2006-04-02 17:54:47 +09003057 xfer_mask = ata_pack_xfermask(ap->pio_mask,
3058 ap->mwdma_mask, ap->udma_mask);
3059
3060 /* Apply cable rule here. Don't apply it early because when
3061 * we handle hot plug the cable type can itself change.
3062 */
3063 if (ap->cbl == ATA_CBL_PATA40)
3064 xfer_mask &= ~(0xF8 << ATA_SHIFT_UDMA);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003065
Alan Cox5444a6f2006-03-27 18:58:20 +01003066 /* FIXME: Use port-wide xfermask for now */
Tejun Heoa6d5a512006-03-06 04:31:57 +09003067 for (i = 0; i < ATA_MAX_DEVICES; i++) {
3068 struct ata_device *d = &ap->device[i];
Tejun Heo565083e2006-04-02 17:54:47 +09003069
3070 if (ata_dev_absent(d))
Tejun Heoa6d5a512006-03-06 04:31:57 +09003071 continue;
Tejun Heo565083e2006-04-02 17:54:47 +09003072
3073 if (ata_dev_disabled(d)) {
3074 /* to avoid violating device selection timing */
3075 xfer_mask &= ata_pack_xfermask(d->pio_mask,
3076 UINT_MAX, UINT_MAX);
3077 continue;
3078 }
3079
3080 xfer_mask &= ata_pack_xfermask(d->pio_mask,
3081 d->mwdma_mask, d->udma_mask);
Tejun Heoa6d5a512006-03-06 04:31:57 +09003082 xfer_mask &= ata_id_xfermask(d->id);
3083 if (ata_dma_blacklisted(d))
3084 xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003085 }
3086
Tejun Heoa6d5a512006-03-06 04:31:57 +09003087 if (ata_dma_blacklisted(dev))
Tejun Heof15a1da2006-05-15 20:57:56 +09003088 ata_dev_printk(dev, KERN_WARNING,
3089 "device is on DMA blacklist, disabling DMA\n");
Tejun Heoa6d5a512006-03-06 04:31:57 +09003090
Alan Cox5444a6f2006-03-27 18:58:20 +01003091 if (hs->flags & ATA_HOST_SIMPLEX) {
3092 if (hs->simplex_claimed)
3093 xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA);
3094 }
Tejun Heo565083e2006-04-02 17:54:47 +09003095
Alan Cox5444a6f2006-03-27 18:58:20 +01003096 if (ap->ops->mode_filter)
3097 xfer_mask = ap->ops->mode_filter(ap, dev, xfer_mask);
3098
Tejun Heo565083e2006-04-02 17:54:47 +09003099 ata_unpack_xfermask(xfer_mask, &dev->pio_mask,
3100 &dev->mwdma_mask, &dev->udma_mask);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003101}
3102
Linus Torvalds1da177e2005-04-16 15:20:36 -07003103/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07003104 * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command
Linus Torvalds1da177e2005-04-16 15:20:36 -07003105 * @dev: Device to which command will be sent
3106 *
Jeff Garzik780a87f2005-05-30 15:41:05 -04003107 * Issue SET FEATURES - XFER MODE command to device @dev
3108 * on port @ap.
3109 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07003110 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04003111 * PCI/etc. bus probe sem.
Tejun Heo83206a22006-03-24 15:25:31 +09003112 *
3113 * RETURNS:
3114 * 0 on success, AC_ERR_* mask otherwise.
Linus Torvalds1da177e2005-04-16 15:20:36 -07003115 */
3116
Tejun Heo3373efd2006-05-15 20:57:53 +09003117static unsigned int ata_dev_set_xfermode(struct ata_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003118{
Tejun Heoa0123702005-12-13 14:49:31 +09003119 struct ata_taskfile tf;
Tejun Heo83206a22006-03-24 15:25:31 +09003120 unsigned int err_mask;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003121
3122 /* set up set-features taskfile */
3123 DPRINTK("set features - xfer mode\n");
3124
Tejun Heo3373efd2006-05-15 20:57:53 +09003125 ata_tf_init(dev, &tf);
Tejun Heoa0123702005-12-13 14:49:31 +09003126 tf.command = ATA_CMD_SET_FEATURES;
3127 tf.feature = SETFEATURES_XFER;
3128 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
3129 tf.protocol = ATA_PROT_NODATA;
3130 tf.nsect = dev->xfer_mode;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003131
Tejun Heo3373efd2006-05-15 20:57:53 +09003132 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003133
Tejun Heo83206a22006-03-24 15:25:31 +09003134 DPRINTK("EXIT, err_mask=%x\n", err_mask);
3135 return err_mask;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003136}
3137
3138/**
Albert Lee8bf62ec2005-05-12 15:29:42 -04003139 * ata_dev_init_params - Issue INIT DEV PARAMS command
Albert Lee8bf62ec2005-05-12 15:29:42 -04003140 * @dev: Device to which command will be sent
Randy Dunlape2a7f772006-05-18 10:50:18 -07003141 * @heads: Number of heads (taskfile parameter)
3142 * @sectors: Number of sectors (taskfile parameter)
Albert Lee8bf62ec2005-05-12 15:29:42 -04003143 *
3144 * LOCKING:
Tejun Heo6aff8f12006-02-15 18:24:09 +09003145 * Kernel thread context (may sleep)
3146 *
3147 * RETURNS:
3148 * 0 on success, AC_ERR_* mask otherwise.
Albert Lee8bf62ec2005-05-12 15:29:42 -04003149 */
Tejun Heo3373efd2006-05-15 20:57:53 +09003150static unsigned int ata_dev_init_params(struct ata_device *dev,
3151 u16 heads, u16 sectors)
Albert Lee8bf62ec2005-05-12 15:29:42 -04003152{
Tejun Heoa0123702005-12-13 14:49:31 +09003153 struct ata_taskfile tf;
Tejun Heo6aff8f12006-02-15 18:24:09 +09003154 unsigned int err_mask;
Albert Lee8bf62ec2005-05-12 15:29:42 -04003155
3156 /* Number of sectors per track 1-255. Number of heads 1-16 */
3157 if (sectors < 1 || sectors > 255 || heads < 1 || heads > 16)
Albert Lee00b6f5e2006-03-27 16:39:18 +08003158 return AC_ERR_INVALID;
Albert Lee8bf62ec2005-05-12 15:29:42 -04003159
3160 /* set up init dev params taskfile */
3161 DPRINTK("init dev params \n");
3162
Tejun Heo3373efd2006-05-15 20:57:53 +09003163 ata_tf_init(dev, &tf);
Tejun Heoa0123702005-12-13 14:49:31 +09003164 tf.command = ATA_CMD_INIT_DEV_PARAMS;
3165 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
3166 tf.protocol = ATA_PROT_NODATA;
3167 tf.nsect = sectors;
3168 tf.device |= (heads - 1) & 0x0f; /* max head = num. of heads - 1 */
Albert Lee8bf62ec2005-05-12 15:29:42 -04003169
Tejun Heo3373efd2006-05-15 20:57:53 +09003170 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0);
Albert Lee8bf62ec2005-05-12 15:29:42 -04003171
Tejun Heo6aff8f12006-02-15 18:24:09 +09003172 DPRINTK("EXIT, err_mask=%x\n", err_mask);
3173 return err_mask;
Albert Lee8bf62ec2005-05-12 15:29:42 -04003174}
3175
3176/**
Jeff Garzik0cba6322005-05-30 19:49:12 -04003177 * ata_sg_clean - Unmap DMA memory associated with command
3178 * @qc: Command containing DMA memory to be released
3179 *
3180 * Unmap all mapped DMA memory associated with this command.
Linus Torvalds1da177e2005-04-16 15:20:36 -07003181 *
3182 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04003183 * spin_lock_irqsave(host_set lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003184 */
3185
3186static void ata_sg_clean(struct ata_queued_cmd *qc)
3187{
3188 struct ata_port *ap = qc->ap;
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003189 struct scatterlist *sg = qc->__sg;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003190 int dir = qc->dma_dir;
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003191 void *pad_buf = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003192
Tejun Heoa4631472006-02-11 19:11:13 +09003193 WARN_ON(!(qc->flags & ATA_QCFLAG_DMAMAP));
3194 WARN_ON(sg == NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003195
3196 if (qc->flags & ATA_QCFLAG_SINGLE)
Jeff Garzikf1318832006-02-20 16:55:56 -05003197 WARN_ON(qc->n_elem > 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003198
Jeff Garzik2c13b7c2005-11-14 14:14:16 -05003199 VPRINTK("unmapping %u sg elements\n", qc->n_elem);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003200
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003201 /* if we padded the buffer out to 32-bit bound, and data
3202 * xfer direction is from-device, we must copy from the
3203 * pad buffer back into the supplied buffer
3204 */
3205 if (qc->pad_len && !(qc->tf.flags & ATA_TFLAG_WRITE))
3206 pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ);
3207
3208 if (qc->flags & ATA_QCFLAG_SG) {
Jeff Garzike1410f22005-11-14 14:06:26 -05003209 if (qc->n_elem)
Brian King2f1f6102006-03-23 17:30:15 -06003210 dma_unmap_sg(ap->dev, sg, qc->n_elem, dir);
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003211 /* restore last sg */
3212 sg[qc->orig_n_elem - 1].length += qc->pad_len;
3213 if (pad_buf) {
3214 struct scatterlist *psg = &qc->pad_sgent;
3215 void *addr = kmap_atomic(psg->page, KM_IRQ0);
3216 memcpy(addr + psg->offset, pad_buf, qc->pad_len);
Mark Lorddfa15982005-12-12 23:19:28 -05003217 kunmap_atomic(addr, KM_IRQ0);
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003218 }
3219 } else {
Tejun Heo2e242fa2006-02-20 23:48:38 +09003220 if (qc->n_elem)
Brian King2f1f6102006-03-23 17:30:15 -06003221 dma_unmap_single(ap->dev,
Jeff Garzike1410f22005-11-14 14:06:26 -05003222 sg_dma_address(&sg[0]), sg_dma_len(&sg[0]),
3223 dir);
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003224 /* restore sg */
3225 sg->length += qc->pad_len;
3226 if (pad_buf)
3227 memcpy(qc->buf_virt + sg->length - qc->pad_len,
3228 pad_buf, qc->pad_len);
3229 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003230
3231 qc->flags &= ~ATA_QCFLAG_DMAMAP;
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003232 qc->__sg = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003233}
3234
3235/**
3236 * ata_fill_sg - Fill PCI IDE PRD table
3237 * @qc: Metadata associated with taskfile to be transferred
3238 *
Jeff Garzik780a87f2005-05-30 15:41:05 -04003239 * Fill PCI IDE PRD (scatter-gather) table with segments
3240 * associated with the current disk command.
3241 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07003242 * LOCKING:
Jeff Garzik780a87f2005-05-30 15:41:05 -04003243 * spin_lock_irqsave(host_set lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003244 *
3245 */
3246static void ata_fill_sg(struct ata_queued_cmd *qc)
3247{
Linus Torvalds1da177e2005-04-16 15:20:36 -07003248 struct ata_port *ap = qc->ap;
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003249 struct scatterlist *sg;
3250 unsigned int idx;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003251
Tejun Heoa4631472006-02-11 19:11:13 +09003252 WARN_ON(qc->__sg == NULL);
Jeff Garzikf1318832006-02-20 16:55:56 -05003253 WARN_ON(qc->n_elem == 0 && qc->pad_len == 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003254
3255 idx = 0;
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003256 ata_for_each_sg(sg, qc) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003257 u32 addr, offset;
3258 u32 sg_len, len;
3259
3260 /* determine if physical DMA addr spans 64K boundary.
3261 * Note h/w doesn't support 64-bit, so we unconditionally
3262 * truncate dma_addr_t to u32.
3263 */
3264 addr = (u32) sg_dma_address(sg);
3265 sg_len = sg_dma_len(sg);
3266
3267 while (sg_len) {
3268 offset = addr & 0xffff;
3269 len = sg_len;
3270 if ((offset + sg_len) > 0x10000)
3271 len = 0x10000 - offset;
3272
3273 ap->prd[idx].addr = cpu_to_le32(addr);
3274 ap->prd[idx].flags_len = cpu_to_le32(len & 0xffff);
3275 VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", idx, addr, len);
3276
3277 idx++;
3278 sg_len -= len;
3279 addr += len;
3280 }
3281 }
3282
3283 if (idx)
3284 ap->prd[idx - 1].flags_len |= cpu_to_le32(ATA_PRD_EOT);
3285}
3286/**
3287 * ata_check_atapi_dma - Check whether ATAPI DMA can be supported
3288 * @qc: Metadata associated with taskfile to check
3289 *
Jeff Garzik780a87f2005-05-30 15:41:05 -04003290 * Allow low-level driver to filter ATA PACKET commands, returning
3291 * a status indicating whether or not it is OK to use DMA for the
3292 * supplied PACKET command.
3293 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07003294 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04003295 * spin_lock_irqsave(host_set lock)
3296 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07003297 * RETURNS: 0 when ATAPI DMA can be used
3298 * nonzero otherwise
3299 */
3300int ata_check_atapi_dma(struct ata_queued_cmd *qc)
3301{
3302 struct ata_port *ap = qc->ap;
3303 int rc = 0; /* Assume ATAPI DMA is OK by default */
3304
3305 if (ap->ops->check_atapi_dma)
3306 rc = ap->ops->check_atapi_dma(qc);
3307
3308 return rc;
3309}
3310/**
3311 * ata_qc_prep - Prepare taskfile for submission
3312 * @qc: Metadata associated with taskfile to be prepared
3313 *
Jeff Garzik780a87f2005-05-30 15:41:05 -04003314 * Prepare ATA taskfile for submission.
3315 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07003316 * LOCKING:
3317 * spin_lock_irqsave(host_set lock)
3318 */
3319void ata_qc_prep(struct ata_queued_cmd *qc)
3320{
3321 if (!(qc->flags & ATA_QCFLAG_DMAMAP))
3322 return;
3323
3324 ata_fill_sg(qc);
3325}
3326
Brian Kinge46834c2006-03-17 17:04:03 -06003327void ata_noop_qc_prep(struct ata_queued_cmd *qc) { }
3328
Jeff Garzik0cba6322005-05-30 19:49:12 -04003329/**
3330 * ata_sg_init_one - Associate command with memory buffer
3331 * @qc: Command to be associated
3332 * @buf: Memory buffer
3333 * @buflen: Length of memory buffer, in bytes.
3334 *
3335 * Initialize the data-related elements of queued_cmd @qc
3336 * to point to a single memory buffer, @buf of byte length @buflen.
3337 *
3338 * LOCKING:
3339 * spin_lock_irqsave(host_set lock)
3340 */
3341
Linus Torvalds1da177e2005-04-16 15:20:36 -07003342void ata_sg_init_one(struct ata_queued_cmd *qc, void *buf, unsigned int buflen)
3343{
3344 struct scatterlist *sg;
3345
3346 qc->flags |= ATA_QCFLAG_SINGLE;
3347
3348 memset(&qc->sgent, 0, sizeof(qc->sgent));
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003349 qc->__sg = &qc->sgent;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003350 qc->n_elem = 1;
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003351 qc->orig_n_elem = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003352 qc->buf_virt = buf;
Brian King233277c2006-06-07 11:25:31 -05003353 qc->nbytes = buflen;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003354
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003355 sg = qc->__sg;
Jeff Garzikf0612bb2005-10-30 01:58:18 -05003356 sg_init_one(sg, buf, buflen);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003357}
3358
Jeff Garzik0cba6322005-05-30 19:49:12 -04003359/**
3360 * ata_sg_init - Associate command with scatter-gather table.
3361 * @qc: Command to be associated
3362 * @sg: Scatter-gather table.
3363 * @n_elem: Number of elements in s/g table.
3364 *
3365 * Initialize the data-related elements of queued_cmd @qc
3366 * to point to a scatter-gather table @sg, containing @n_elem
3367 * elements.
3368 *
3369 * LOCKING:
3370 * spin_lock_irqsave(host_set lock)
3371 */
3372
Linus Torvalds1da177e2005-04-16 15:20:36 -07003373void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
3374 unsigned int n_elem)
3375{
3376 qc->flags |= ATA_QCFLAG_SG;
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003377 qc->__sg = sg;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003378 qc->n_elem = n_elem;
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003379 qc->orig_n_elem = n_elem;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003380}
3381
3382/**
Jeff Garzik0cba6322005-05-30 19:49:12 -04003383 * ata_sg_setup_one - DMA-map the memory buffer associated with a command.
3384 * @qc: Command with memory buffer to be mapped.
3385 *
3386 * DMA-map the memory buffer associated with queued_cmd @qc.
Linus Torvalds1da177e2005-04-16 15:20:36 -07003387 *
3388 * LOCKING:
3389 * spin_lock_irqsave(host_set lock)
3390 *
3391 * RETURNS:
Jeff Garzik0cba6322005-05-30 19:49:12 -04003392 * Zero on success, negative on error.
Linus Torvalds1da177e2005-04-16 15:20:36 -07003393 */
3394
3395static int ata_sg_setup_one(struct ata_queued_cmd *qc)
3396{
3397 struct ata_port *ap = qc->ap;
3398 int dir = qc->dma_dir;
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003399 struct scatterlist *sg = qc->__sg;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003400 dma_addr_t dma_address;
Tejun Heo2e242fa2006-02-20 23:48:38 +09003401 int trim_sg = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003402
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003403 /* we must lengthen transfers to end on a 32-bit boundary */
3404 qc->pad_len = sg->length & 3;
3405 if (qc->pad_len) {
3406 void *pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ);
3407 struct scatterlist *psg = &qc->pad_sgent;
3408
Tejun Heoa4631472006-02-11 19:11:13 +09003409 WARN_ON(qc->dev->class != ATA_DEV_ATAPI);
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003410
3411 memset(pad_buf, 0, ATA_DMA_PAD_SZ);
3412
3413 if (qc->tf.flags & ATA_TFLAG_WRITE)
3414 memcpy(pad_buf, qc->buf_virt + sg->length - qc->pad_len,
3415 qc->pad_len);
3416
3417 sg_dma_address(psg) = ap->pad_dma + (qc->tag * ATA_DMA_PAD_SZ);
3418 sg_dma_len(psg) = ATA_DMA_PAD_SZ;
3419 /* trim sg */
3420 sg->length -= qc->pad_len;
Tejun Heo2e242fa2006-02-20 23:48:38 +09003421 if (sg->length == 0)
3422 trim_sg = 1;
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003423
3424 DPRINTK("padding done, sg->length=%u pad_len=%u\n",
3425 sg->length, qc->pad_len);
3426 }
3427
Tejun Heo2e242fa2006-02-20 23:48:38 +09003428 if (trim_sg) {
3429 qc->n_elem--;
Jeff Garzike1410f22005-11-14 14:06:26 -05003430 goto skip_map;
3431 }
3432
Brian King2f1f6102006-03-23 17:30:15 -06003433 dma_address = dma_map_single(ap->dev, qc->buf_virt,
Albert Lee32529e02005-05-26 03:49:42 -04003434 sg->length, dir);
Tejun Heo537a95d2005-11-05 14:29:01 -05003435 if (dma_mapping_error(dma_address)) {
3436 /* restore sg */
3437 sg->length += qc->pad_len;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003438 return -1;
Tejun Heo537a95d2005-11-05 14:29:01 -05003439 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003440
3441 sg_dma_address(sg) = dma_address;
Albert Lee32529e02005-05-26 03:49:42 -04003442 sg_dma_len(sg) = sg->length;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003443
Tejun Heo2e242fa2006-02-20 23:48:38 +09003444skip_map:
Linus Torvalds1da177e2005-04-16 15:20:36 -07003445 DPRINTK("mapped buffer of %d bytes for %s\n", sg_dma_len(sg),
3446 qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read");
3447
3448 return 0;
3449}
3450
3451/**
Jeff Garzik0cba6322005-05-30 19:49:12 -04003452 * ata_sg_setup - DMA-map the scatter-gather table associated with a command.
3453 * @qc: Command with scatter-gather table to be mapped.
3454 *
3455 * DMA-map the scatter-gather table associated with queued_cmd @qc.
Linus Torvalds1da177e2005-04-16 15:20:36 -07003456 *
3457 * LOCKING:
3458 * spin_lock_irqsave(host_set lock)
3459 *
3460 * RETURNS:
Jeff Garzik0cba6322005-05-30 19:49:12 -04003461 * Zero on success, negative on error.
Linus Torvalds1da177e2005-04-16 15:20:36 -07003462 *
3463 */
3464
3465static int ata_sg_setup(struct ata_queued_cmd *qc)
3466{
3467 struct ata_port *ap = qc->ap;
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003468 struct scatterlist *sg = qc->__sg;
3469 struct scatterlist *lsg = &sg[qc->n_elem - 1];
Jeff Garzike1410f22005-11-14 14:06:26 -05003470 int n_elem, pre_n_elem, dir, trim_sg = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003471
3472 VPRINTK("ENTER, ata%u\n", ap->id);
Tejun Heoa4631472006-02-11 19:11:13 +09003473 WARN_ON(!(qc->flags & ATA_QCFLAG_SG));
Linus Torvalds1da177e2005-04-16 15:20:36 -07003474
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003475 /* we must lengthen transfers to end on a 32-bit boundary */
3476 qc->pad_len = lsg->length & 3;
3477 if (qc->pad_len) {
3478 void *pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ);
3479 struct scatterlist *psg = &qc->pad_sgent;
3480 unsigned int offset;
3481
Tejun Heoa4631472006-02-11 19:11:13 +09003482 WARN_ON(qc->dev->class != ATA_DEV_ATAPI);
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003483
3484 memset(pad_buf, 0, ATA_DMA_PAD_SZ);
3485
3486 /*
3487 * psg->page/offset are used to copy to-be-written
3488 * data in this function or read data in ata_sg_clean.
3489 */
3490 offset = lsg->offset + lsg->length - qc->pad_len;
3491 psg->page = nth_page(lsg->page, offset >> PAGE_SHIFT);
3492 psg->offset = offset_in_page(offset);
3493
3494 if (qc->tf.flags & ATA_TFLAG_WRITE) {
3495 void *addr = kmap_atomic(psg->page, KM_IRQ0);
3496 memcpy(pad_buf, addr + psg->offset, qc->pad_len);
Mark Lorddfa15982005-12-12 23:19:28 -05003497 kunmap_atomic(addr, KM_IRQ0);
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003498 }
3499
3500 sg_dma_address(psg) = ap->pad_dma + (qc->tag * ATA_DMA_PAD_SZ);
3501 sg_dma_len(psg) = ATA_DMA_PAD_SZ;
3502 /* trim last sg */
3503 lsg->length -= qc->pad_len;
Jeff Garzike1410f22005-11-14 14:06:26 -05003504 if (lsg->length == 0)
3505 trim_sg = 1;
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003506
3507 DPRINTK("padding done, sg[%d].length=%u pad_len=%u\n",
3508 qc->n_elem - 1, lsg->length, qc->pad_len);
3509 }
3510
Jeff Garzike1410f22005-11-14 14:06:26 -05003511 pre_n_elem = qc->n_elem;
3512 if (trim_sg && pre_n_elem)
3513 pre_n_elem--;
3514
3515 if (!pre_n_elem) {
3516 n_elem = 0;
3517 goto skip_map;
3518 }
3519
Linus Torvalds1da177e2005-04-16 15:20:36 -07003520 dir = qc->dma_dir;
Brian King2f1f6102006-03-23 17:30:15 -06003521 n_elem = dma_map_sg(ap->dev, sg, pre_n_elem, dir);
Tejun Heo537a95d2005-11-05 14:29:01 -05003522 if (n_elem < 1) {
3523 /* restore last sg */
3524 lsg->length += qc->pad_len;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003525 return -1;
Tejun Heo537a95d2005-11-05 14:29:01 -05003526 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003527
3528 DPRINTK("%d sg elements mapped\n", n_elem);
3529
Jeff Garzike1410f22005-11-14 14:06:26 -05003530skip_map:
Linus Torvalds1da177e2005-04-16 15:20:36 -07003531 qc->n_elem = n_elem;
3532
3533 return 0;
3534}
3535
3536/**
Randy Dunlapc893a3a2006-01-28 13:15:32 -05003537 * swap_buf_le16 - swap halves of 16-bit words in place
Edward Falk0baab862005-06-02 18:17:13 -04003538 * @buf: Buffer to swap
3539 * @buf_words: Number of 16-bit words in buffer.
3540 *
3541 * Swap halves of 16-bit words if needed to convert from
3542 * little-endian byte order to native cpu byte order, or
3543 * vice-versa.
3544 *
3545 * LOCKING:
Randy Dunlap6f0ef4f2005-10-25 01:44:30 -04003546 * Inherited from caller.
Edward Falk0baab862005-06-02 18:17:13 -04003547 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003548void swap_buf_le16(u16 *buf, unsigned int buf_words)
3549{
3550#ifdef __BIG_ENDIAN
3551 unsigned int i;
3552
3553 for (i = 0; i < buf_words; i++)
3554 buf[i] = le16_to_cpu(buf[i]);
3555#endif /* __BIG_ENDIAN */
3556}
3557
Albert Lee6ae4cfb2005-08-12 14:15:34 +08003558/**
3559 * ata_mmio_data_xfer - Transfer data by MMIO
Jeff Garzikbf717b112006-06-13 20:27:03 -04003560 * @adev: device for this I/O
Albert Lee6ae4cfb2005-08-12 14:15:34 +08003561 * @buf: data buffer
3562 * @buflen: buffer length
Jeff Garzik344baba2005-09-07 01:15:17 -04003563 * @write_data: read/write
Albert Lee6ae4cfb2005-08-12 14:15:34 +08003564 *
3565 * Transfer data from/to the device data register by MMIO.
3566 *
3567 * LOCKING:
3568 * Inherited from caller.
Albert Lee6ae4cfb2005-08-12 14:15:34 +08003569 */
3570
Tejun Heo88574552006-06-25 20:00:35 +09003571void ata_mmio_data_xfer(struct ata_device *adev, unsigned char *buf,
Alan Coxa6b2c5d2006-05-22 16:59:59 +01003572 unsigned int buflen, int write_data)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003573{
Alan Coxa6b2c5d2006-05-22 16:59:59 +01003574 struct ata_port *ap = adev->ap;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003575 unsigned int i;
3576 unsigned int words = buflen >> 1;
3577 u16 *buf16 = (u16 *) buf;
3578 void __iomem *mmio = (void __iomem *)ap->ioaddr.data_addr;
3579
Albert Lee6ae4cfb2005-08-12 14:15:34 +08003580 /* Transfer multiple of 2 bytes */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003581 if (write_data) {
3582 for (i = 0; i < words; i++)
3583 writew(le16_to_cpu(buf16[i]), mmio);
3584 } else {
3585 for (i = 0; i < words; i++)
3586 buf16[i] = cpu_to_le16(readw(mmio));
3587 }
Albert Lee6ae4cfb2005-08-12 14:15:34 +08003588
3589 /* Transfer trailing 1 byte, if any. */
3590 if (unlikely(buflen & 0x01)) {
3591 u16 align_buf[1] = { 0 };
3592 unsigned char *trailing_buf = buf + buflen - 1;
3593
3594 if (write_data) {
3595 memcpy(align_buf, trailing_buf, 1);
3596 writew(le16_to_cpu(align_buf[0]), mmio);
3597 } else {
3598 align_buf[0] = cpu_to_le16(readw(mmio));
3599 memcpy(trailing_buf, align_buf, 1);
3600 }
3601 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003602}
3603
Albert Lee6ae4cfb2005-08-12 14:15:34 +08003604/**
3605 * ata_pio_data_xfer - Transfer data by PIO
Alan Coxa6b2c5d2006-05-22 16:59:59 +01003606 * @adev: device to target
Albert Lee6ae4cfb2005-08-12 14:15:34 +08003607 * @buf: data buffer
3608 * @buflen: buffer length
Jeff Garzik344baba2005-09-07 01:15:17 -04003609 * @write_data: read/write
Albert Lee6ae4cfb2005-08-12 14:15:34 +08003610 *
3611 * Transfer data from/to the device data register by PIO.
3612 *
3613 * LOCKING:
3614 * Inherited from caller.
Albert Lee6ae4cfb2005-08-12 14:15:34 +08003615 */
3616
Tejun Heo88574552006-06-25 20:00:35 +09003617void ata_pio_data_xfer(struct ata_device *adev, unsigned char *buf,
Alan Coxa6b2c5d2006-05-22 16:59:59 +01003618 unsigned int buflen, int write_data)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003619{
Alan Coxa6b2c5d2006-05-22 16:59:59 +01003620 struct ata_port *ap = adev->ap;
Albert Lee6ae4cfb2005-08-12 14:15:34 +08003621 unsigned int words = buflen >> 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003622
Albert Lee6ae4cfb2005-08-12 14:15:34 +08003623 /* Transfer multiple of 2 bytes */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003624 if (write_data)
Albert Lee6ae4cfb2005-08-12 14:15:34 +08003625 outsw(ap->ioaddr.data_addr, buf, words);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003626 else
Albert Lee6ae4cfb2005-08-12 14:15:34 +08003627 insw(ap->ioaddr.data_addr, buf, words);
3628
3629 /* Transfer trailing 1 byte, if any. */
3630 if (unlikely(buflen & 0x01)) {
3631 u16 align_buf[1] = { 0 };
3632 unsigned char *trailing_buf = buf + buflen - 1;
3633
3634 if (write_data) {
3635 memcpy(align_buf, trailing_buf, 1);
3636 outw(le16_to_cpu(align_buf[0]), ap->ioaddr.data_addr);
3637 } else {
3638 align_buf[0] = cpu_to_le16(inw(ap->ioaddr.data_addr));
3639 memcpy(trailing_buf, align_buf, 1);
3640 }
3641 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003642}
3643
Albert Lee6ae4cfb2005-08-12 14:15:34 +08003644/**
Alan Cox75e99582006-05-24 14:14:41 +01003645 * ata_pio_data_xfer_noirq - Transfer data by PIO
3646 * @adev: device to target
3647 * @buf: data buffer
3648 * @buflen: buffer length
3649 * @write_data: read/write
3650 *
Tejun Heo88574552006-06-25 20:00:35 +09003651 * Transfer data from/to the device data register by PIO. Do the
Alan Cox75e99582006-05-24 14:14:41 +01003652 * transfer with interrupts disabled.
3653 *
3654 * LOCKING:
3655 * Inherited from caller.
3656 */
3657
3658void ata_pio_data_xfer_noirq(struct ata_device *adev, unsigned char *buf,
3659 unsigned int buflen, int write_data)
3660{
3661 unsigned long flags;
3662 local_irq_save(flags);
3663 ata_pio_data_xfer(adev, buf, buflen, write_data);
3664 local_irq_restore(flags);
3665}
3666
3667
3668/**
Albert Lee6ae4cfb2005-08-12 14:15:34 +08003669 * ata_pio_sector - Transfer ATA_SECT_SIZE (512 bytes) of data.
3670 * @qc: Command on going
3671 *
3672 * Transfer ATA_SECT_SIZE of data from/to the ATA device.
3673 *
3674 * LOCKING:
3675 * Inherited from caller.
3676 */
3677
Linus Torvalds1da177e2005-04-16 15:20:36 -07003678static void ata_pio_sector(struct ata_queued_cmd *qc)
3679{
3680 int do_write = (qc->tf.flags & ATA_TFLAG_WRITE);
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003681 struct scatterlist *sg = qc->__sg;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003682 struct ata_port *ap = qc->ap;
3683 struct page *page;
3684 unsigned int offset;
3685 unsigned char *buf;
3686
3687 if (qc->cursect == (qc->nsect - 1))
Albert Lee14be71f2005-09-27 17:36:35 +08003688 ap->hsm_task_state = HSM_ST_LAST;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003689
3690 page = sg[qc->cursg].page;
3691 offset = sg[qc->cursg].offset + qc->cursg_ofs * ATA_SECT_SIZE;
3692
3693 /* get the current page and offset */
3694 page = nth_page(page, (offset >> PAGE_SHIFT));
3695 offset %= PAGE_SIZE;
3696
Albert Lee7282aa42005-10-09 09:46:07 -04003697 DPRINTK("data %s\n", qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read");
3698
Albert Lee91b8b312005-10-09 09:48:44 -04003699 if (PageHighMem(page)) {
3700 unsigned long flags;
Albert Lee7282aa42005-10-09 09:46:07 -04003701
Alan Coxa6b2c5d2006-05-22 16:59:59 +01003702 /* FIXME: use a bounce buffer */
Albert Lee91b8b312005-10-09 09:48:44 -04003703 local_irq_save(flags);
3704 buf = kmap_atomic(page, KM_IRQ0);
Albert Lee083958d2005-10-09 09:47:31 -04003705
Albert Lee91b8b312005-10-09 09:48:44 -04003706 /* do the actual data transfer */
Alan Coxa6b2c5d2006-05-22 16:59:59 +01003707 ap->ops->data_xfer(qc->dev, buf + offset, ATA_SECT_SIZE, do_write);
Albert Lee91b8b312005-10-09 09:48:44 -04003708
3709 kunmap_atomic(buf, KM_IRQ0);
3710 local_irq_restore(flags);
3711 } else {
3712 buf = page_address(page);
Alan Coxa6b2c5d2006-05-22 16:59:59 +01003713 ap->ops->data_xfer(qc->dev, buf + offset, ATA_SECT_SIZE, do_write);
Albert Lee91b8b312005-10-09 09:48:44 -04003714 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003715
3716 qc->cursect++;
3717 qc->cursg_ofs++;
3718
Albert Lee32529e02005-05-26 03:49:42 -04003719 if ((qc->cursg_ofs * ATA_SECT_SIZE) == (&sg[qc->cursg])->length) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003720 qc->cursg++;
3721 qc->cursg_ofs = 0;
3722 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003723}
Linus Torvalds1da177e2005-04-16 15:20:36 -07003724
Albert Lee6ae4cfb2005-08-12 14:15:34 +08003725/**
Albert Lee07f6f7d2005-11-01 19:33:20 +08003726 * ata_pio_sectors - Transfer one or many 512-byte sectors.
3727 * @qc: Command on going
3728 *
Jeff Garzikc81e29b2006-05-24 01:49:12 -04003729 * Transfer one or many ATA_SECT_SIZE of data from/to the
Albert Lee07f6f7d2005-11-01 19:33:20 +08003730 * ATA device for the DRQ request.
3731 *
3732 * LOCKING:
3733 * Inherited from caller.
3734 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003735
Albert Lee07f6f7d2005-11-01 19:33:20 +08003736static void ata_pio_sectors(struct ata_queued_cmd *qc)
3737{
3738 if (is_multi_taskfile(&qc->tf)) {
3739 /* READ/WRITE MULTIPLE */
3740 unsigned int nsect;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003741
Jeff Garzik587005d2006-02-11 18:17:32 -05003742 WARN_ON(qc->dev->multi_count == 0);
Albert Lee07f6f7d2005-11-01 19:33:20 +08003743
3744 nsect = min(qc->nsect - qc->cursect, qc->dev->multi_count);
3745 while (nsect--)
3746 ata_pio_sector(qc);
3747 } else
3748 ata_pio_sector(qc);
3749}
3750
3751/**
Albert Leec71c1852005-10-04 06:03:45 -04003752 * atapi_send_cdb - Write CDB bytes to hardware
3753 * @ap: Port to which ATAPI device is attached.
3754 * @qc: Taskfile currently active
3755 *
3756 * When device has indicated its readiness to accept
3757 * a CDB, this function is called. Send the CDB.
3758 *
3759 * LOCKING:
3760 * caller.
3761 */
3762
3763static void atapi_send_cdb(struct ata_port *ap, struct ata_queued_cmd *qc)
3764{
3765 /* send SCSI cdb */
3766 DPRINTK("send cdb\n");
Jeff Garzikdb024d52006-02-13 00:23:57 -05003767 WARN_ON(qc->dev->cdb_len < 12);
Albert Leec71c1852005-10-04 06:03:45 -04003768
Alan Coxa6b2c5d2006-05-22 16:59:59 +01003769 ap->ops->data_xfer(qc->dev, qc->cdb, qc->dev->cdb_len, 1);
Albert Leec71c1852005-10-04 06:03:45 -04003770 ata_altstatus(ap); /* flush */
3771
3772 switch (qc->tf.protocol) {
3773 case ATA_PROT_ATAPI:
3774 ap->hsm_task_state = HSM_ST;
3775 break;
3776 case ATA_PROT_ATAPI_NODATA:
3777 ap->hsm_task_state = HSM_ST_LAST;
3778 break;
3779 case ATA_PROT_ATAPI_DMA:
3780 ap->hsm_task_state = HSM_ST_LAST;
3781 /* initiate bmdma */
3782 ap->ops->bmdma_start(qc);
3783 break;
3784 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003785}
3786
Albert Lee6ae4cfb2005-08-12 14:15:34 +08003787/**
3788 * __atapi_pio_bytes - Transfer data from/to the ATAPI device.
3789 * @qc: Command on going
3790 * @bytes: number of bytes
3791 *
3792 * Transfer Transfer data from/to the ATAPI device.
3793 *
3794 * LOCKING:
3795 * Inherited from caller.
3796 *
3797 */
3798
Linus Torvalds1da177e2005-04-16 15:20:36 -07003799static void __atapi_pio_bytes(struct ata_queued_cmd *qc, unsigned int bytes)
3800{
3801 int do_write = (qc->tf.flags & ATA_TFLAG_WRITE);
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003802 struct scatterlist *sg = qc->__sg;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003803 struct ata_port *ap = qc->ap;
3804 struct page *page;
3805 unsigned char *buf;
3806 unsigned int offset, count;
3807
Albert Lee563a6e12005-08-12 14:17:50 +08003808 if (qc->curbytes + bytes >= qc->nbytes)
Albert Lee14be71f2005-09-27 17:36:35 +08003809 ap->hsm_task_state = HSM_ST_LAST;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003810
3811next_sg:
Albert Lee563a6e12005-08-12 14:17:50 +08003812 if (unlikely(qc->cursg >= qc->n_elem)) {
Jeff Garzik7fb6ec22005-09-16 06:01:48 -04003813 /*
Albert Lee563a6e12005-08-12 14:17:50 +08003814 * The end of qc->sg is reached and the device expects
3815 * more data to transfer. In order not to overrun qc->sg
3816 * and fulfill length specified in the byte count register,
3817 * - for read case, discard trailing data from the device
3818 * - for write case, padding zero data to the device
3819 */
3820 u16 pad_buf[1] = { 0 };
3821 unsigned int words = bytes >> 1;
3822 unsigned int i;
3823
3824 if (words) /* warning if bytes > 1 */
Tejun Heof15a1da2006-05-15 20:57:56 +09003825 ata_dev_printk(qc->dev, KERN_WARNING,
3826 "%u bytes trailing data\n", bytes);
Albert Lee563a6e12005-08-12 14:17:50 +08003827
3828 for (i = 0; i < words; i++)
Alan Coxa6b2c5d2006-05-22 16:59:59 +01003829 ap->ops->data_xfer(qc->dev, (unsigned char*)pad_buf, 2, do_write);
Albert Lee563a6e12005-08-12 14:17:50 +08003830
Albert Lee14be71f2005-09-27 17:36:35 +08003831 ap->hsm_task_state = HSM_ST_LAST;
Albert Lee563a6e12005-08-12 14:17:50 +08003832 return;
3833 }
3834
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003835 sg = &qc->__sg[qc->cursg];
Linus Torvalds1da177e2005-04-16 15:20:36 -07003836
Linus Torvalds1da177e2005-04-16 15:20:36 -07003837 page = sg->page;
3838 offset = sg->offset + qc->cursg_ofs;
3839
3840 /* get the current page and offset */
3841 page = nth_page(page, (offset >> PAGE_SHIFT));
3842 offset %= PAGE_SIZE;
3843
Albert Lee6952df02005-06-06 15:56:03 +08003844 /* don't overrun current sg */
Albert Lee32529e02005-05-26 03:49:42 -04003845 count = min(sg->length - qc->cursg_ofs, bytes);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003846
3847 /* don't cross page boundaries */
3848 count = min(count, (unsigned int)PAGE_SIZE - offset);
3849
Albert Lee7282aa42005-10-09 09:46:07 -04003850 DPRINTK("data %s\n", qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read");
3851
Albert Lee91b8b312005-10-09 09:48:44 -04003852 if (PageHighMem(page)) {
3853 unsigned long flags;
Albert Lee7282aa42005-10-09 09:46:07 -04003854
Alan Coxa6b2c5d2006-05-22 16:59:59 +01003855 /* FIXME: use bounce buffer */
Albert Lee91b8b312005-10-09 09:48:44 -04003856 local_irq_save(flags);
3857 buf = kmap_atomic(page, KM_IRQ0);
Albert Lee083958d2005-10-09 09:47:31 -04003858
Albert Lee91b8b312005-10-09 09:48:44 -04003859 /* do the actual data transfer */
Alan Coxa6b2c5d2006-05-22 16:59:59 +01003860 ap->ops->data_xfer(qc->dev, buf + offset, count, do_write);
Albert Lee91b8b312005-10-09 09:48:44 -04003861
3862 kunmap_atomic(buf, KM_IRQ0);
3863 local_irq_restore(flags);
3864 } else {
3865 buf = page_address(page);
Alan Coxa6b2c5d2006-05-22 16:59:59 +01003866 ap->ops->data_xfer(qc->dev, buf + offset, count, do_write);
Albert Lee91b8b312005-10-09 09:48:44 -04003867 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003868
3869 bytes -= count;
3870 qc->curbytes += count;
3871 qc->cursg_ofs += count;
3872
Albert Lee32529e02005-05-26 03:49:42 -04003873 if (qc->cursg_ofs == sg->length) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003874 qc->cursg++;
3875 qc->cursg_ofs = 0;
3876 }
3877
Albert Lee563a6e12005-08-12 14:17:50 +08003878 if (bytes)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003879 goto next_sg;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003880}
3881
Albert Lee6ae4cfb2005-08-12 14:15:34 +08003882/**
3883 * atapi_pio_bytes - Transfer data from/to the ATAPI device.
3884 * @qc: Command on going
3885 *
3886 * Transfer Transfer data from/to the ATAPI device.
3887 *
3888 * LOCKING:
3889 * Inherited from caller.
Albert Lee6ae4cfb2005-08-12 14:15:34 +08003890 */
3891
Linus Torvalds1da177e2005-04-16 15:20:36 -07003892static void atapi_pio_bytes(struct ata_queued_cmd *qc)
3893{
3894 struct ata_port *ap = qc->ap;
3895 struct ata_device *dev = qc->dev;
3896 unsigned int ireason, bc_lo, bc_hi, bytes;
3897 int i_write, do_write = (qc->tf.flags & ATA_TFLAG_WRITE) ? 1 : 0;
3898
Albert Leeeec4c3f2006-05-18 17:51:10 +08003899 /* Abuse qc->result_tf for temp storage of intermediate TF
3900 * here to save some kernel stack usage.
3901 * For normal completion, qc->result_tf is not relevant. For
3902 * error, qc->result_tf is later overwritten by ata_qc_complete().
3903 * So, the correctness of qc->result_tf is not affected.
3904 */
3905 ap->ops->tf_read(ap, &qc->result_tf);
3906 ireason = qc->result_tf.nsect;
3907 bc_lo = qc->result_tf.lbam;
3908 bc_hi = qc->result_tf.lbah;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003909 bytes = (bc_hi << 8) | bc_lo;
3910
3911 /* shall be cleared to zero, indicating xfer of data */
3912 if (ireason & (1 << 0))
3913 goto err_out;
3914
3915 /* make sure transfer direction matches expected */
3916 i_write = ((ireason & (1 << 1)) == 0) ? 1 : 0;
3917 if (do_write != i_write)
3918 goto err_out;
3919
Albert Lee312f7da2005-09-27 17:38:03 +08003920 VPRINTK("ata%u: xfering %d bytes\n", ap->id, bytes);
3921
Linus Torvalds1da177e2005-04-16 15:20:36 -07003922 __atapi_pio_bytes(qc, bytes);
3923
3924 return;
3925
3926err_out:
Tejun Heof15a1da2006-05-15 20:57:56 +09003927 ata_dev_printk(dev, KERN_INFO, "ATAPI check failed\n");
Tejun Heo11a56d22006-01-23 13:09:36 +09003928 qc->err_mask |= AC_ERR_HSM;
Albert Lee14be71f2005-09-27 17:36:35 +08003929 ap->hsm_task_state = HSM_ST_ERR;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003930}
3931
3932/**
Albert Leec234fb02006-03-25 17:58:38 +08003933 * ata_hsm_ok_in_wq - Check if the qc can be handled in the workqueue.
3934 * @ap: the target ata_port
3935 * @qc: qc on going
Linus Torvalds1da177e2005-04-16 15:20:36 -07003936 *
Albert Leec234fb02006-03-25 17:58:38 +08003937 * RETURNS:
3938 * 1 if ok in workqueue, 0 otherwise.
Linus Torvalds1da177e2005-04-16 15:20:36 -07003939 */
Albert Leec234fb02006-03-25 17:58:38 +08003940
3941static inline int ata_hsm_ok_in_wq(struct ata_port *ap, struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003942{
Albert Leec234fb02006-03-25 17:58:38 +08003943 if (qc->tf.flags & ATA_TFLAG_POLLING)
3944 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003945
Albert Leec234fb02006-03-25 17:58:38 +08003946 if (ap->hsm_task_state == HSM_ST_FIRST) {
3947 if (qc->tf.protocol == ATA_PROT_PIO &&
3948 (qc->tf.flags & ATA_TFLAG_WRITE))
3949 return 1;
3950
3951 if (is_atapi_taskfile(&qc->tf) &&
3952 !(qc->dev->flags & ATA_DFLAG_CDB_INTR))
3953 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003954 }
3955
Albert Leec234fb02006-03-25 17:58:38 +08003956 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003957}
3958
Albert Leec234fb02006-03-25 17:58:38 +08003959/**
Tejun Heoc17ea202006-05-15 20:59:29 +09003960 * ata_hsm_qc_complete - finish a qc running on standard HSM
3961 * @qc: Command to complete
3962 * @in_wq: 1 if called from workqueue, 0 otherwise
3963 *
3964 * Finish @qc which is running on standard HSM.
3965 *
3966 * LOCKING:
3967 * If @in_wq is zero, spin_lock_irqsave(host_set lock).
3968 * Otherwise, none on entry and grabs host lock.
3969 */
3970static void ata_hsm_qc_complete(struct ata_queued_cmd *qc, int in_wq)
3971{
3972 struct ata_port *ap = qc->ap;
3973 unsigned long flags;
3974
3975 if (ap->ops->error_handler) {
3976 if (in_wq) {
Jeff Garzikba6a1302006-06-22 23:46:10 -04003977 spin_lock_irqsave(ap->lock, flags);
Tejun Heoc17ea202006-05-15 20:59:29 +09003978
3979 /* EH might have kicked in while host_set lock
3980 * is released.
3981 */
3982 qc = ata_qc_from_tag(ap, qc->tag);
3983 if (qc) {
3984 if (likely(!(qc->err_mask & AC_ERR_HSM))) {
3985 ata_irq_on(ap);
3986 ata_qc_complete(qc);
3987 } else
3988 ata_port_freeze(ap);
3989 }
3990
Jeff Garzikba6a1302006-06-22 23:46:10 -04003991 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heoc17ea202006-05-15 20:59:29 +09003992 } else {
3993 if (likely(!(qc->err_mask & AC_ERR_HSM)))
3994 ata_qc_complete(qc);
3995 else
3996 ata_port_freeze(ap);
3997 }
3998 } else {
3999 if (in_wq) {
Jeff Garzikba6a1302006-06-22 23:46:10 -04004000 spin_lock_irqsave(ap->lock, flags);
Tejun Heoc17ea202006-05-15 20:59:29 +09004001 ata_irq_on(ap);
4002 ata_qc_complete(qc);
Jeff Garzikba6a1302006-06-22 23:46:10 -04004003 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heoc17ea202006-05-15 20:59:29 +09004004 } else
4005 ata_qc_complete(qc);
4006 }
Jeff Garzikc81e29b2006-05-24 01:49:12 -04004007
4008 ata_altstatus(ap); /* flush */
Tejun Heoc17ea202006-05-15 20:59:29 +09004009}
4010
4011/**
Albert Leebb5cb292006-03-25 17:48:02 +08004012 * ata_hsm_move - move the HSM to the next state.
4013 * @ap: the target ata_port
4014 * @qc: qc on going
4015 * @status: current device status
4016 * @in_wq: 1 if called from workqueue, 0 otherwise
4017 *
4018 * RETURNS:
4019 * 1 when poll next status needed, 0 otherwise.
4020 */
Tejun Heo9a1004d2006-05-31 18:27:52 +09004021int ata_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc,
4022 u8 status, int in_wq)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004023{
Albert Leebb5cb292006-03-25 17:48:02 +08004024 unsigned long flags = 0;
4025 int poll_next;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004026
Albert Lee6912ccd2006-03-25 17:45:49 +08004027 WARN_ON((qc->flags & ATA_QCFLAG_ACTIVE) == 0);
Albert Lee0565c262006-02-13 18:55:25 +08004028
Albert Leebb5cb292006-03-25 17:48:02 +08004029 /* Make sure ata_qc_issue_prot() does not throw things
4030 * like DMA polling into the workqueue. Notice that
4031 * in_wq is not equivalent to (qc->tf.flags & ATA_TFLAG_POLLING).
Albert Lee1c848982005-12-05 15:40:15 +08004032 */
Albert Leec234fb02006-03-25 17:58:38 +08004033 WARN_ON(in_wq != ata_hsm_ok_in_wq(ap, qc));
Albert Lee1c848982005-12-05 15:40:15 +08004034
Albert Leee2cec772006-03-25 17:43:49 +08004035fsm_start:
Albert Lee999bb6f2006-03-25 18:07:48 +08004036 DPRINTK("ata%u: protocol %d task_state %d (dev_stat 0x%X)\n",
4037 ap->id, qc->tf.protocol, ap->hsm_task_state, status);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004038
Albert Leee2cec772006-03-25 17:43:49 +08004039 switch (ap->hsm_task_state) {
4040 case HSM_ST_FIRST:
Albert Leebb5cb292006-03-25 17:48:02 +08004041 /* Send first data block or PACKET CDB */
4042
4043 /* If polling, we will stay in the work queue after
4044 * sending the data. Otherwise, interrupt handler
4045 * takes over after sending the data.
4046 */
4047 poll_next = (qc->tf.flags & ATA_TFLAG_POLLING);
4048
Albert Leee2cec772006-03-25 17:43:49 +08004049 /* check device status */
Albert Lee3655d1d2006-05-19 11:43:04 +08004050 if (unlikely((status & ATA_DRQ) == 0)) {
4051 /* handle BSY=0, DRQ=0 as error */
4052 if (likely(status & (ATA_ERR | ATA_DF)))
4053 /* device stops HSM for abort/error */
4054 qc->err_mask |= AC_ERR_DEV;
4055 else
4056 /* HSM violation. Let EH handle this */
4057 qc->err_mask |= AC_ERR_HSM;
4058
Albert Leee2cec772006-03-25 17:43:49 +08004059 ap->hsm_task_state = HSM_ST_ERR;
4060 goto fsm_start;
4061 }
4062
Albert Lee71601952006-03-25 18:11:12 +08004063 /* Device should not ask for data transfer (DRQ=1)
4064 * when it finds something wrong.
Albert Leeeee6c322006-04-01 17:38:43 +08004065 * We ignore DRQ here and stop the HSM by
4066 * changing hsm_task_state to HSM_ST_ERR and
4067 * let the EH abort the command or reset the device.
Albert Lee71601952006-03-25 18:11:12 +08004068 */
4069 if (unlikely(status & (ATA_ERR | ATA_DF))) {
4070 printk(KERN_WARNING "ata%d: DRQ=1 with device error, dev_stat 0x%X\n",
4071 ap->id, status);
Albert Lee3655d1d2006-05-19 11:43:04 +08004072 qc->err_mask |= AC_ERR_HSM;
Albert Leeeee6c322006-04-01 17:38:43 +08004073 ap->hsm_task_state = HSM_ST_ERR;
4074 goto fsm_start;
Albert Lee71601952006-03-25 18:11:12 +08004075 }
4076
Albert Leebb5cb292006-03-25 17:48:02 +08004077 /* Send the CDB (atapi) or the first data block (ata pio out).
4078 * During the state transition, interrupt handler shouldn't
4079 * be invoked before the data transfer is complete and
4080 * hsm_task_state is changed. Hence, the following locking.
4081 */
4082 if (in_wq)
Jeff Garzikba6a1302006-06-22 23:46:10 -04004083 spin_lock_irqsave(ap->lock, flags);
Albert Leee2cec772006-03-25 17:43:49 +08004084
Albert Leebb5cb292006-03-25 17:48:02 +08004085 if (qc->tf.protocol == ATA_PROT_PIO) {
4086 /* PIO data out protocol.
4087 * send first data block.
4088 */
4089
4090 /* ata_pio_sectors() might change the state
4091 * to HSM_ST_LAST. so, the state is changed here
4092 * before ata_pio_sectors().
4093 */
4094 ap->hsm_task_state = HSM_ST;
4095 ata_pio_sectors(qc);
4096 ata_altstatus(ap); /* flush */
4097 } else
4098 /* send CDB */
4099 atapi_send_cdb(ap, qc);
4100
4101 if (in_wq)
Jeff Garzikba6a1302006-06-22 23:46:10 -04004102 spin_unlock_irqrestore(ap->lock, flags);
Albert Leebb5cb292006-03-25 17:48:02 +08004103
4104 /* if polling, ata_pio_task() handles the rest.
4105 * otherwise, interrupt handler takes over from here.
4106 */
Albert Leee2cec772006-03-25 17:43:49 +08004107 break;
4108
4109 case HSM_ST:
4110 /* complete command or read/write the data register */
4111 if (qc->tf.protocol == ATA_PROT_ATAPI) {
4112 /* ATAPI PIO protocol */
4113 if ((status & ATA_DRQ) == 0) {
Albert Lee3655d1d2006-05-19 11:43:04 +08004114 /* No more data to transfer or device error.
4115 * Device error will be tagged in HSM_ST_LAST.
4116 */
Albert Leee2cec772006-03-25 17:43:49 +08004117 ap->hsm_task_state = HSM_ST_LAST;
4118 goto fsm_start;
4119 }
4120
Albert Lee71601952006-03-25 18:11:12 +08004121 /* Device should not ask for data transfer (DRQ=1)
4122 * when it finds something wrong.
Albert Leeeee6c322006-04-01 17:38:43 +08004123 * We ignore DRQ here and stop the HSM by
4124 * changing hsm_task_state to HSM_ST_ERR and
4125 * let the EH abort the command or reset the device.
Albert Lee71601952006-03-25 18:11:12 +08004126 */
4127 if (unlikely(status & (ATA_ERR | ATA_DF))) {
4128 printk(KERN_WARNING "ata%d: DRQ=1 with device error, dev_stat 0x%X\n",
4129 ap->id, status);
Albert Lee3655d1d2006-05-19 11:43:04 +08004130 qc->err_mask |= AC_ERR_HSM;
Albert Leeeee6c322006-04-01 17:38:43 +08004131 ap->hsm_task_state = HSM_ST_ERR;
4132 goto fsm_start;
Albert Lee71601952006-03-25 18:11:12 +08004133 }
4134
Albert Leee2cec772006-03-25 17:43:49 +08004135 atapi_pio_bytes(qc);
4136
4137 if (unlikely(ap->hsm_task_state == HSM_ST_ERR))
4138 /* bad ireason reported by device */
4139 goto fsm_start;
4140
4141 } else {
4142 /* ATA PIO protocol */
4143 if (unlikely((status & ATA_DRQ) == 0)) {
4144 /* handle BSY=0, DRQ=0 as error */
Albert Lee3655d1d2006-05-19 11:43:04 +08004145 if (likely(status & (ATA_ERR | ATA_DF)))
4146 /* device stops HSM for abort/error */
4147 qc->err_mask |= AC_ERR_DEV;
4148 else
4149 /* HSM violation. Let EH handle this */
4150 qc->err_mask |= AC_ERR_HSM;
4151
Albert Leee2cec772006-03-25 17:43:49 +08004152 ap->hsm_task_state = HSM_ST_ERR;
4153 goto fsm_start;
4154 }
4155
Albert Leeeee6c322006-04-01 17:38:43 +08004156 /* For PIO reads, some devices may ask for
4157 * data transfer (DRQ=1) alone with ERR=1.
4158 * We respect DRQ here and transfer one
4159 * block of junk data before changing the
4160 * hsm_task_state to HSM_ST_ERR.
4161 *
4162 * For PIO writes, ERR=1 DRQ=1 doesn't make
4163 * sense since the data block has been
4164 * transferred to the device.
Albert Lee71601952006-03-25 18:11:12 +08004165 */
4166 if (unlikely(status & (ATA_ERR | ATA_DF))) {
Albert Lee71601952006-03-25 18:11:12 +08004167 /* data might be corrputed */
4168 qc->err_mask |= AC_ERR_DEV;
Albert Leeeee6c322006-04-01 17:38:43 +08004169
4170 if (!(qc->tf.flags & ATA_TFLAG_WRITE)) {
4171 ata_pio_sectors(qc);
4172 ata_altstatus(ap);
4173 status = ata_wait_idle(ap);
4174 }
4175
Albert Lee3655d1d2006-05-19 11:43:04 +08004176 if (status & (ATA_BUSY | ATA_DRQ))
4177 qc->err_mask |= AC_ERR_HSM;
4178
Albert Leeeee6c322006-04-01 17:38:43 +08004179 /* ata_pio_sectors() might change the
4180 * state to HSM_ST_LAST. so, the state
4181 * is changed after ata_pio_sectors().
4182 */
4183 ap->hsm_task_state = HSM_ST_ERR;
4184 goto fsm_start;
Albert Lee71601952006-03-25 18:11:12 +08004185 }
4186
Albert Leee2cec772006-03-25 17:43:49 +08004187 ata_pio_sectors(qc);
4188
4189 if (ap->hsm_task_state == HSM_ST_LAST &&
4190 (!(qc->tf.flags & ATA_TFLAG_WRITE))) {
4191 /* all data read */
4192 ata_altstatus(ap);
Albert Lee52a32202006-03-25 18:18:15 +08004193 status = ata_wait_idle(ap);
Albert Leee2cec772006-03-25 17:43:49 +08004194 goto fsm_start;
4195 }
4196 }
4197
4198 ata_altstatus(ap); /* flush */
Albert Leebb5cb292006-03-25 17:48:02 +08004199 poll_next = 1;
Albert Leee2cec772006-03-25 17:43:49 +08004200 break;
4201
4202 case HSM_ST_LAST:
Albert Lee6912ccd2006-03-25 17:45:49 +08004203 if (unlikely(!ata_ok(status))) {
4204 qc->err_mask |= __ac_err_mask(status);
Albert Leee2cec772006-03-25 17:43:49 +08004205 ap->hsm_task_state = HSM_ST_ERR;
4206 goto fsm_start;
4207 }
4208
4209 /* no more data to transfer */
Albert Lee4332a772006-04-03 17:43:24 +08004210 DPRINTK("ata%u: dev %u command complete, drv_stat 0x%x\n",
4211 ap->id, qc->dev->devno, status);
Albert Leee2cec772006-03-25 17:43:49 +08004212
Albert Lee6912ccd2006-03-25 17:45:49 +08004213 WARN_ON(qc->err_mask);
4214
Albert Leee2cec772006-03-25 17:43:49 +08004215 ap->hsm_task_state = HSM_ST_IDLE;
4216
4217 /* complete taskfile transaction */
Tejun Heoc17ea202006-05-15 20:59:29 +09004218 ata_hsm_qc_complete(qc, in_wq);
Albert Leebb5cb292006-03-25 17:48:02 +08004219
4220 poll_next = 0;
Albert Leee2cec772006-03-25 17:43:49 +08004221 break;
4222
4223 case HSM_ST_ERR:
Albert Leee2cec772006-03-25 17:43:49 +08004224 /* make sure qc->err_mask is available to
4225 * know what's wrong and recover
4226 */
4227 WARN_ON(qc->err_mask == 0);
4228
4229 ap->hsm_task_state = HSM_ST_IDLE;
Albert Leebb5cb292006-03-25 17:48:02 +08004230
Albert Lee999bb6f2006-03-25 18:07:48 +08004231 /* complete taskfile transaction */
Tejun Heoc17ea202006-05-15 20:59:29 +09004232 ata_hsm_qc_complete(qc, in_wq);
Albert Leebb5cb292006-03-25 17:48:02 +08004233
4234 poll_next = 0;
Albert Leee2cec772006-03-25 17:43:49 +08004235 break;
4236 default:
Albert Leebb5cb292006-03-25 17:48:02 +08004237 poll_next = 0;
Albert Lee6912ccd2006-03-25 17:45:49 +08004238 BUG();
Albert Leee2cec772006-03-25 17:43:49 +08004239 }
4240
Albert Leebb5cb292006-03-25 17:48:02 +08004241 return poll_next;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004242}
4243
4244static void ata_pio_task(void *_data)
4245{
Tejun Heoc91af2c2006-04-02 18:51:53 +09004246 struct ata_queued_cmd *qc = _data;
4247 struct ata_port *ap = qc->ap;
Albert Leea1af3732006-03-25 17:50:15 +08004248 u8 status;
4249 int poll_next;
Jeff Garzik7fb6ec22005-09-16 06:01:48 -04004250
4251fsm_start:
Albert Leea1af3732006-03-25 17:50:15 +08004252 WARN_ON(ap->hsm_task_state == HSM_ST_IDLE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004253
Albert Leea1af3732006-03-25 17:50:15 +08004254 /*
4255 * This is purely heuristic. This is a fast path.
4256 * Sometimes when we enter, BSY will be cleared in
4257 * a chk-status or two. If not, the drive is probably seeking
4258 * or something. Snooze for a couple msecs, then
4259 * chk-status again. If still busy, queue delayed work.
4260 */
4261 status = ata_busy_wait(ap, ATA_BUSY, 5);
4262 if (status & ATA_BUSY) {
4263 msleep(2);
4264 status = ata_busy_wait(ap, ATA_BUSY, 10);
4265 if (status & ATA_BUSY) {
Albert Lee31ce6da2006-04-03 18:31:44 +08004266 ata_port_queue_task(ap, ata_pio_task, qc, ATA_SHORT_PAUSE);
Albert Leea1af3732006-03-25 17:50:15 +08004267 return;
4268 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07004269 }
4270
Albert Leea1af3732006-03-25 17:50:15 +08004271 /* move the HSM */
4272 poll_next = ata_hsm_move(ap, qc, status, 1);
4273
4274 /* another command or interrupt handler
4275 * may be running at this point.
4276 */
4277 if (poll_next)
Jeff Garzik7fb6ec22005-09-16 06:01:48 -04004278 goto fsm_start;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004279}
4280
Linus Torvalds1da177e2005-04-16 15:20:36 -07004281/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07004282 * ata_qc_new - Request an available ATA command, for queueing
4283 * @ap: Port associated with device @dev
4284 * @dev: Device from whom we request an available command structure
4285 *
4286 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04004287 * None.
Linus Torvalds1da177e2005-04-16 15:20:36 -07004288 */
4289
4290static struct ata_queued_cmd *ata_qc_new(struct ata_port *ap)
4291{
4292 struct ata_queued_cmd *qc = NULL;
4293 unsigned int i;
4294
Tejun Heoe3180492006-05-15 20:58:09 +09004295 /* no command while frozen */
Tejun Heob51e9e52006-06-29 01:29:30 +09004296 if (unlikely(ap->pflags & ATA_PFLAG_FROZEN))
Tejun Heoe3180492006-05-15 20:58:09 +09004297 return NULL;
4298
Tejun Heo2ab7db12006-05-15 20:58:02 +09004299 /* the last tag is reserved for internal command. */
4300 for (i = 0; i < ATA_MAX_QUEUE - 1; i++)
Tejun Heo6cec4a32006-05-15 21:03:41 +09004301 if (!test_and_set_bit(i, &ap->qc_allocated)) {
Tejun Heof69499f2006-05-15 20:58:03 +09004302 qc = __ata_qc_from_tag(ap, i);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004303 break;
4304 }
4305
4306 if (qc)
4307 qc->tag = i;
4308
4309 return qc;
4310}
4311
4312/**
4313 * ata_qc_new_init - Request an available ATA command, and initialize it
Linus Torvalds1da177e2005-04-16 15:20:36 -07004314 * @dev: Device from whom we request an available command structure
4315 *
4316 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04004317 * None.
Linus Torvalds1da177e2005-04-16 15:20:36 -07004318 */
4319
Tejun Heo3373efd2006-05-15 20:57:53 +09004320struct ata_queued_cmd *ata_qc_new_init(struct ata_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004321{
Tejun Heo3373efd2006-05-15 20:57:53 +09004322 struct ata_port *ap = dev->ap;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004323 struct ata_queued_cmd *qc;
4324
4325 qc = ata_qc_new(ap);
4326 if (qc) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07004327 qc->scsicmd = NULL;
4328 qc->ap = ap;
4329 qc->dev = dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004330
Jeff Garzik2c13b7c2005-11-14 14:14:16 -05004331 ata_qc_reinit(qc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004332 }
4333
4334 return qc;
4335}
4336
Linus Torvalds1da177e2005-04-16 15:20:36 -07004337/**
4338 * ata_qc_free - free unused ata_queued_cmd
4339 * @qc: Command to complete
4340 *
4341 * Designed to free unused ata_queued_cmd object
4342 * in case something prevents using it.
4343 *
4344 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04004345 * spin_lock_irqsave(host_set lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004346 */
4347void ata_qc_free(struct ata_queued_cmd *qc)
4348{
Tejun Heo4ba946e2006-01-23 13:09:36 +09004349 struct ata_port *ap = qc->ap;
4350 unsigned int tag;
4351
Tejun Heoa4631472006-02-11 19:11:13 +09004352 WARN_ON(qc == NULL); /* ata_qc_from_tag _might_ return NULL */
Linus Torvalds1da177e2005-04-16 15:20:36 -07004353
Tejun Heo4ba946e2006-01-23 13:09:36 +09004354 qc->flags = 0;
4355 tag = qc->tag;
4356 if (likely(ata_tag_valid(tag))) {
Tejun Heo4ba946e2006-01-23 13:09:36 +09004357 qc->tag = ATA_TAG_POISON;
Tejun Heo6cec4a32006-05-15 21:03:41 +09004358 clear_bit(tag, &ap->qc_allocated);
Tejun Heo4ba946e2006-01-23 13:09:36 +09004359 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07004360}
4361
Tejun Heo76014422006-02-11 15:13:49 +09004362void __ata_qc_complete(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004363{
Tejun Heodedaf2b2006-05-15 21:03:43 +09004364 struct ata_port *ap = qc->ap;
4365
Tejun Heoa4631472006-02-11 19:11:13 +09004366 WARN_ON(qc == NULL); /* ata_qc_from_tag _might_ return NULL */
4367 WARN_ON(!(qc->flags & ATA_QCFLAG_ACTIVE));
Linus Torvalds1da177e2005-04-16 15:20:36 -07004368
4369 if (likely(qc->flags & ATA_QCFLAG_DMAMAP))
4370 ata_sg_clean(qc);
4371
Tejun Heo7401abf2006-05-15 20:57:32 +09004372 /* command should be marked inactive atomically with qc completion */
Tejun Heodedaf2b2006-05-15 21:03:43 +09004373 if (qc->tf.protocol == ATA_PROT_NCQ)
4374 ap->sactive &= ~(1 << qc->tag);
4375 else
4376 ap->active_tag = ATA_TAG_POISON;
Tejun Heo7401abf2006-05-15 20:57:32 +09004377
Albert Lee3f3791d2005-08-16 14:25:38 +08004378 /* atapi: mark qc as inactive to prevent the interrupt handler
4379 * from completing the command twice later, before the error handler
4380 * is called. (when rc != 0 and atapi request sense is needed)
4381 */
4382 qc->flags &= ~ATA_QCFLAG_ACTIVE;
Tejun Heodedaf2b2006-05-15 21:03:43 +09004383 ap->qc_active &= ~(1 << qc->tag);
Albert Lee3f3791d2005-08-16 14:25:38 +08004384
Linus Torvalds1da177e2005-04-16 15:20:36 -07004385 /* call completion callback */
Tejun Heo77853bf2006-01-23 13:09:36 +09004386 qc->complete_fn(qc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004387}
4388
Tejun Heof686bcb2006-05-15 20:58:05 +09004389/**
4390 * ata_qc_complete - Complete an active ATA command
4391 * @qc: Command to complete
4392 * @err_mask: ATA Status register contents
4393 *
4394 * Indicate to the mid and upper layers that an ATA
4395 * command has completed, with either an ok or not-ok status.
4396 *
4397 * LOCKING:
4398 * spin_lock_irqsave(host_set lock)
4399 */
4400void ata_qc_complete(struct ata_queued_cmd *qc)
4401{
4402 struct ata_port *ap = qc->ap;
4403
4404 /* XXX: New EH and old EH use different mechanisms to
4405 * synchronize EH with regular execution path.
4406 *
4407 * In new EH, a failed qc is marked with ATA_QCFLAG_FAILED.
4408 * Normal execution path is responsible for not accessing a
4409 * failed qc. libata core enforces the rule by returning NULL
4410 * from ata_qc_from_tag() for failed qcs.
4411 *
4412 * Old EH depends on ata_qc_complete() nullifying completion
4413 * requests if ATA_QCFLAG_EH_SCHEDULED is set. Old EH does
4414 * not synchronize with interrupt handler. Only PIO task is
4415 * taken care of.
4416 */
4417 if (ap->ops->error_handler) {
Tejun Heob51e9e52006-06-29 01:29:30 +09004418 WARN_ON(ap->pflags & ATA_PFLAG_FROZEN);
Tejun Heof686bcb2006-05-15 20:58:05 +09004419
4420 if (unlikely(qc->err_mask))
4421 qc->flags |= ATA_QCFLAG_FAILED;
4422
4423 if (unlikely(qc->flags & ATA_QCFLAG_FAILED)) {
4424 if (!ata_tag_internal(qc->tag)) {
4425 /* always fill result TF for failed qc */
4426 ap->ops->tf_read(ap, &qc->result_tf);
4427 ata_qc_schedule_eh(qc);
4428 return;
4429 }
4430 }
4431
4432 /* read result TF if requested */
4433 if (qc->flags & ATA_QCFLAG_RESULT_TF)
4434 ap->ops->tf_read(ap, &qc->result_tf);
4435
4436 __ata_qc_complete(qc);
4437 } else {
4438 if (qc->flags & ATA_QCFLAG_EH_SCHEDULED)
4439 return;
4440
4441 /* read result TF if failed or requested */
4442 if (qc->err_mask || qc->flags & ATA_QCFLAG_RESULT_TF)
4443 ap->ops->tf_read(ap, &qc->result_tf);
4444
4445 __ata_qc_complete(qc);
4446 }
4447}
4448
Tejun Heodedaf2b2006-05-15 21:03:43 +09004449/**
4450 * ata_qc_complete_multiple - Complete multiple qcs successfully
4451 * @ap: port in question
4452 * @qc_active: new qc_active mask
4453 * @finish_qc: LLDD callback invoked before completing a qc
4454 *
4455 * Complete in-flight commands. This functions is meant to be
4456 * called from low-level driver's interrupt routine to complete
4457 * requests normally. ap->qc_active and @qc_active is compared
4458 * and commands are completed accordingly.
4459 *
4460 * LOCKING:
4461 * spin_lock_irqsave(host_set lock)
4462 *
4463 * RETURNS:
4464 * Number of completed commands on success, -errno otherwise.
4465 */
4466int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active,
4467 void (*finish_qc)(struct ata_queued_cmd *))
4468{
4469 int nr_done = 0;
4470 u32 done_mask;
4471 int i;
4472
4473 done_mask = ap->qc_active ^ qc_active;
4474
4475 if (unlikely(done_mask & qc_active)) {
4476 ata_port_printk(ap, KERN_ERR, "illegal qc_active transition "
4477 "(%08x->%08x)\n", ap->qc_active, qc_active);
4478 return -EINVAL;
4479 }
4480
4481 for (i = 0; i < ATA_MAX_QUEUE; i++) {
4482 struct ata_queued_cmd *qc;
4483
4484 if (!(done_mask & (1 << i)))
4485 continue;
4486
4487 if ((qc = ata_qc_from_tag(ap, i))) {
4488 if (finish_qc)
4489 finish_qc(qc);
4490 ata_qc_complete(qc);
4491 nr_done++;
4492 }
4493 }
4494
4495 return nr_done;
4496}
4497
Linus Torvalds1da177e2005-04-16 15:20:36 -07004498static inline int ata_should_dma_map(struct ata_queued_cmd *qc)
4499{
4500 struct ata_port *ap = qc->ap;
4501
4502 switch (qc->tf.protocol) {
Tejun Heo3dc1d882006-05-15 21:03:45 +09004503 case ATA_PROT_NCQ:
Linus Torvalds1da177e2005-04-16 15:20:36 -07004504 case ATA_PROT_DMA:
4505 case ATA_PROT_ATAPI_DMA:
4506 return 1;
4507
4508 case ATA_PROT_ATAPI:
4509 case ATA_PROT_PIO:
Linus Torvalds1da177e2005-04-16 15:20:36 -07004510 if (ap->flags & ATA_FLAG_PIO_DMA)
4511 return 1;
4512
4513 /* fall through */
4514
4515 default:
4516 return 0;
4517 }
4518
4519 /* never reached */
4520}
4521
4522/**
4523 * ata_qc_issue - issue taskfile to device
4524 * @qc: command to issue to device
4525 *
4526 * Prepare an ATA command to submission to device.
4527 * This includes mapping the data into a DMA-able
4528 * area, filling in the S/G table, and finally
4529 * writing the taskfile to hardware, starting the command.
4530 *
4531 * LOCKING:
4532 * spin_lock_irqsave(host_set lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004533 */
Tejun Heo8e0e6942006-03-31 20:41:11 +09004534void ata_qc_issue(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004535{
4536 struct ata_port *ap = qc->ap;
4537
Tejun Heodedaf2b2006-05-15 21:03:43 +09004538 /* Make sure only one non-NCQ command is outstanding. The
4539 * check is skipped for old EH because it reuses active qc to
4540 * request ATAPI sense.
4541 */
4542 WARN_ON(ap->ops->error_handler && ata_tag_valid(ap->active_tag));
4543
4544 if (qc->tf.protocol == ATA_PROT_NCQ) {
4545 WARN_ON(ap->sactive & (1 << qc->tag));
4546 ap->sactive |= 1 << qc->tag;
4547 } else {
4548 WARN_ON(ap->sactive);
4549 ap->active_tag = qc->tag;
4550 }
4551
Tejun Heoe4a70e72006-03-31 20:36:47 +09004552 qc->flags |= ATA_QCFLAG_ACTIVE;
Tejun Heodedaf2b2006-05-15 21:03:43 +09004553 ap->qc_active |= 1 << qc->tag;
Tejun Heoe4a70e72006-03-31 20:36:47 +09004554
Linus Torvalds1da177e2005-04-16 15:20:36 -07004555 if (ata_should_dma_map(qc)) {
4556 if (qc->flags & ATA_QCFLAG_SG) {
4557 if (ata_sg_setup(qc))
Tejun Heo8e436af2006-01-23 13:09:36 +09004558 goto sg_err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004559 } else if (qc->flags & ATA_QCFLAG_SINGLE) {
4560 if (ata_sg_setup_one(qc))
Tejun Heo8e436af2006-01-23 13:09:36 +09004561 goto sg_err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004562 }
4563 } else {
4564 qc->flags &= ~ATA_QCFLAG_DMAMAP;
4565 }
4566
4567 ap->ops->qc_prep(qc);
4568
Tejun Heo8e0e6942006-03-31 20:41:11 +09004569 qc->err_mask |= ap->ops->qc_issue(qc);
4570 if (unlikely(qc->err_mask))
4571 goto err;
4572 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004573
Tejun Heo8e436af2006-01-23 13:09:36 +09004574sg_err:
4575 qc->flags &= ~ATA_QCFLAG_DMAMAP;
Tejun Heo8e0e6942006-03-31 20:41:11 +09004576 qc->err_mask |= AC_ERR_SYSTEM;
4577err:
4578 ata_qc_complete(qc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004579}
4580
4581/**
4582 * ata_qc_issue_prot - issue taskfile to device in proto-dependent manner
4583 * @qc: command to issue to device
4584 *
4585 * Using various libata functions and hooks, this function
4586 * starts an ATA command. ATA commands are grouped into
4587 * classes called "protocols", and issuing each type of protocol
4588 * is slightly different.
4589 *
Edward Falk0baab862005-06-02 18:17:13 -04004590 * May be used as the qc_issue() entry in ata_port_operations.
4591 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07004592 * LOCKING:
4593 * spin_lock_irqsave(host_set lock)
4594 *
4595 * RETURNS:
Tejun Heo9a3d9eb2006-01-23 13:09:36 +09004596 * Zero on success, AC_ERR_* mask on failure
Linus Torvalds1da177e2005-04-16 15:20:36 -07004597 */
4598
Tejun Heo9a3d9eb2006-01-23 13:09:36 +09004599unsigned int ata_qc_issue_prot(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004600{
4601 struct ata_port *ap = qc->ap;
4602
Albert Leee50362e2005-09-27 17:39:50 +08004603 /* Use polling pio if the LLD doesn't handle
4604 * interrupt driven pio and atapi CDB interrupt.
4605 */
4606 if (ap->flags & ATA_FLAG_PIO_POLLING) {
4607 switch (qc->tf.protocol) {
4608 case ATA_PROT_PIO:
4609 case ATA_PROT_ATAPI:
4610 case ATA_PROT_ATAPI_NODATA:
4611 qc->tf.flags |= ATA_TFLAG_POLLING;
4612 break;
4613 case ATA_PROT_ATAPI_DMA:
4614 if (qc->dev->flags & ATA_DFLAG_CDB_INTR)
Albert Lee3a778272006-06-22 13:00:25 +08004615 /* see ata_dma_blacklisted() */
Albert Leee50362e2005-09-27 17:39:50 +08004616 BUG();
4617 break;
4618 default:
4619 break;
4620 }
4621 }
4622
Albert Lee312f7da2005-09-27 17:38:03 +08004623 /* select the device */
Linus Torvalds1da177e2005-04-16 15:20:36 -07004624 ata_dev_select(ap, qc->dev->devno, 1, 0);
4625
Albert Lee312f7da2005-09-27 17:38:03 +08004626 /* start the command */
Linus Torvalds1da177e2005-04-16 15:20:36 -07004627 switch (qc->tf.protocol) {
4628 case ATA_PROT_NODATA:
Albert Lee312f7da2005-09-27 17:38:03 +08004629 if (qc->tf.flags & ATA_TFLAG_POLLING)
4630 ata_qc_set_polling(qc);
4631
Jeff Garzike5338252005-10-30 21:37:17 -05004632 ata_tf_to_host(ap, &qc->tf);
Albert Lee312f7da2005-09-27 17:38:03 +08004633 ap->hsm_task_state = HSM_ST_LAST;
4634
4635 if (qc->tf.flags & ATA_TFLAG_POLLING)
Albert Lee31ce6da2006-04-03 18:31:44 +08004636 ata_port_queue_task(ap, ata_pio_task, qc, 0);
Albert Lee312f7da2005-09-27 17:38:03 +08004637
Linus Torvalds1da177e2005-04-16 15:20:36 -07004638 break;
4639
4640 case ATA_PROT_DMA:
Jeff Garzik587005d2006-02-11 18:17:32 -05004641 WARN_ON(qc->tf.flags & ATA_TFLAG_POLLING);
Albert Lee312f7da2005-09-27 17:38:03 +08004642
Linus Torvalds1da177e2005-04-16 15:20:36 -07004643 ap->ops->tf_load(ap, &qc->tf); /* load tf registers */
4644 ap->ops->bmdma_setup(qc); /* set up bmdma */
4645 ap->ops->bmdma_start(qc); /* initiate bmdma */
Albert Lee312f7da2005-09-27 17:38:03 +08004646 ap->hsm_task_state = HSM_ST_LAST;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004647 break;
4648
Albert Lee312f7da2005-09-27 17:38:03 +08004649 case ATA_PROT_PIO:
4650 if (qc->tf.flags & ATA_TFLAG_POLLING)
4651 ata_qc_set_polling(qc);
4652
Jeff Garzike5338252005-10-30 21:37:17 -05004653 ata_tf_to_host(ap, &qc->tf);
Albert Lee312f7da2005-09-27 17:38:03 +08004654
Albert Lee54f00382005-09-30 19:14:19 +08004655 if (qc->tf.flags & ATA_TFLAG_WRITE) {
4656 /* PIO data out protocol */
4657 ap->hsm_task_state = HSM_ST_FIRST;
Albert Lee31ce6da2006-04-03 18:31:44 +08004658 ata_port_queue_task(ap, ata_pio_task, qc, 0);
Albert Lee54f00382005-09-30 19:14:19 +08004659
4660 /* always send first data block using
Albert Leee27486d2005-11-01 19:24:49 +08004661 * the ata_pio_task() codepath.
Albert Lee54f00382005-09-30 19:14:19 +08004662 */
Albert Lee312f7da2005-09-27 17:38:03 +08004663 } else {
Albert Lee54f00382005-09-30 19:14:19 +08004664 /* PIO data in protocol */
4665 ap->hsm_task_state = HSM_ST;
Albert Lee312f7da2005-09-27 17:38:03 +08004666
Albert Lee54f00382005-09-30 19:14:19 +08004667 if (qc->tf.flags & ATA_TFLAG_POLLING)
Albert Lee31ce6da2006-04-03 18:31:44 +08004668 ata_port_queue_task(ap, ata_pio_task, qc, 0);
Albert Lee312f7da2005-09-27 17:38:03 +08004669
Albert Lee54f00382005-09-30 19:14:19 +08004670 /* if polling, ata_pio_task() handles the rest.
4671 * otherwise, interrupt handler takes over from here.
4672 */
Albert Lee312f7da2005-09-27 17:38:03 +08004673 }
4674
Linus Torvalds1da177e2005-04-16 15:20:36 -07004675 break;
4676
4677 case ATA_PROT_ATAPI:
Linus Torvalds1da177e2005-04-16 15:20:36 -07004678 case ATA_PROT_ATAPI_NODATA:
Albert Lee312f7da2005-09-27 17:38:03 +08004679 if (qc->tf.flags & ATA_TFLAG_POLLING)
4680 ata_qc_set_polling(qc);
4681
Jeff Garzike5338252005-10-30 21:37:17 -05004682 ata_tf_to_host(ap, &qc->tf);
Jeff Garzikf6ef65e2006-01-27 02:45:00 -05004683
Albert Lee312f7da2005-09-27 17:38:03 +08004684 ap->hsm_task_state = HSM_ST_FIRST;
4685
4686 /* send cdb by polling if no cdb interrupt */
4687 if ((!(qc->dev->flags & ATA_DFLAG_CDB_INTR)) ||
4688 (qc->tf.flags & ATA_TFLAG_POLLING))
Albert Lee31ce6da2006-04-03 18:31:44 +08004689 ata_port_queue_task(ap, ata_pio_task, qc, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004690 break;
4691
4692 case ATA_PROT_ATAPI_DMA:
Jeff Garzik587005d2006-02-11 18:17:32 -05004693 WARN_ON(qc->tf.flags & ATA_TFLAG_POLLING);
Albert Lee312f7da2005-09-27 17:38:03 +08004694
Linus Torvalds1da177e2005-04-16 15:20:36 -07004695 ap->ops->tf_load(ap, &qc->tf); /* load tf registers */
4696 ap->ops->bmdma_setup(qc); /* set up bmdma */
Albert Lee312f7da2005-09-27 17:38:03 +08004697 ap->hsm_task_state = HSM_ST_FIRST;
4698
4699 /* send cdb by polling if no cdb interrupt */
4700 if (!(qc->dev->flags & ATA_DFLAG_CDB_INTR))
Albert Lee31ce6da2006-04-03 18:31:44 +08004701 ata_port_queue_task(ap, ata_pio_task, qc, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004702 break;
4703
4704 default:
4705 WARN_ON(1);
Tejun Heo9a3d9eb2006-01-23 13:09:36 +09004706 return AC_ERR_SYSTEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004707 }
4708
4709 return 0;
4710}
4711
4712/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07004713 * ata_host_intr - Handle host interrupt for given (port, task)
4714 * @ap: Port on which interrupt arrived (possibly...)
4715 * @qc: Taskfile currently active in engine
4716 *
4717 * Handle host interrupt for given queued command. Currently,
4718 * only DMA interrupts are handled. All other commands are
4719 * handled via polling with interrupts disabled (nIEN bit).
4720 *
4721 * LOCKING:
4722 * spin_lock_irqsave(host_set lock)
4723 *
4724 * RETURNS:
4725 * One if interrupt was handled, zero if not (shared irq).
4726 */
4727
4728inline unsigned int ata_host_intr (struct ata_port *ap,
4729 struct ata_queued_cmd *qc)
4730{
Albert Lee312f7da2005-09-27 17:38:03 +08004731 u8 status, host_stat = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004732
Albert Lee312f7da2005-09-27 17:38:03 +08004733 VPRINTK("ata%u: protocol %d task_state %d\n",
4734 ap->id, qc->tf.protocol, ap->hsm_task_state);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004735
Albert Lee312f7da2005-09-27 17:38:03 +08004736 /* Check whether we are expecting interrupt in this state */
4737 switch (ap->hsm_task_state) {
4738 case HSM_ST_FIRST:
Albert Lee6912ccd2006-03-25 17:45:49 +08004739 /* Some pre-ATAPI-4 devices assert INTRQ
4740 * at this state when ready to receive CDB.
4741 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07004742
Albert Lee312f7da2005-09-27 17:38:03 +08004743 /* Check the ATA_DFLAG_CDB_INTR flag is enough here.
4744 * The flag was turned on only for atapi devices.
4745 * No need to check is_atapi_taskfile(&qc->tf) again.
4746 */
4747 if (!(qc->dev->flags & ATA_DFLAG_CDB_INTR))
Linus Torvalds1da177e2005-04-16 15:20:36 -07004748 goto idle_irq;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004749 break;
Albert Lee312f7da2005-09-27 17:38:03 +08004750 case HSM_ST_LAST:
4751 if (qc->tf.protocol == ATA_PROT_DMA ||
4752 qc->tf.protocol == ATA_PROT_ATAPI_DMA) {
4753 /* check status of DMA engine */
4754 host_stat = ap->ops->bmdma_status(ap);
4755 VPRINTK("ata%u: host_stat 0x%X\n", ap->id, host_stat);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004756
Albert Lee312f7da2005-09-27 17:38:03 +08004757 /* if it's not our irq... */
4758 if (!(host_stat & ATA_DMA_INTR))
4759 goto idle_irq;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004760
Albert Lee312f7da2005-09-27 17:38:03 +08004761 /* before we do anything else, clear DMA-Start bit */
4762 ap->ops->bmdma_stop(qc);
Albert Leea4f16612005-12-26 16:40:53 +08004763
4764 if (unlikely(host_stat & ATA_DMA_ERR)) {
4765 /* error when transfering data to/from memory */
4766 qc->err_mask |= AC_ERR_HOST_BUS;
4767 ap->hsm_task_state = HSM_ST_ERR;
4768 }
Albert Lee312f7da2005-09-27 17:38:03 +08004769 }
4770 break;
4771 case HSM_ST:
4772 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004773 default:
4774 goto idle_irq;
4775 }
4776
Albert Lee312f7da2005-09-27 17:38:03 +08004777 /* check altstatus */
4778 status = ata_altstatus(ap);
4779 if (status & ATA_BUSY)
4780 goto idle_irq;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004781
Albert Lee312f7da2005-09-27 17:38:03 +08004782 /* check main status, clearing INTRQ */
4783 status = ata_chk_status(ap);
4784 if (unlikely(status & ATA_BUSY))
4785 goto idle_irq;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004786
Albert Lee312f7da2005-09-27 17:38:03 +08004787 /* ack bmdma irq events */
4788 ap->ops->irq_clear(ap);
4789
Albert Leebb5cb292006-03-25 17:48:02 +08004790 ata_hsm_move(ap, qc, status, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004791 return 1; /* irq handled */
4792
4793idle_irq:
4794 ap->stats.idle_irq++;
4795
4796#ifdef ATA_IRQ_TRAP
4797 if ((ap->stats.idle_irq % 1000) == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07004798 ata_irq_ack(ap, 0); /* debug trap */
Tejun Heof15a1da2006-05-15 20:57:56 +09004799 ata_port_printk(ap, KERN_WARNING, "irq trap\n");
Alan Cox23cfce82006-03-21 16:06:53 +00004800 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004801 }
4802#endif
4803 return 0; /* irq not handled */
4804}
4805
4806/**
4807 * ata_interrupt - Default ATA host interrupt handler
Jeff Garzik0cba6322005-05-30 19:49:12 -04004808 * @irq: irq line (unused)
4809 * @dev_instance: pointer to our ata_host_set information structure
Linus Torvalds1da177e2005-04-16 15:20:36 -07004810 * @regs: unused
4811 *
Jeff Garzik0cba6322005-05-30 19:49:12 -04004812 * Default interrupt handler for PCI IDE devices. Calls
4813 * ata_host_intr() for each port that is not disabled.
4814 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07004815 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04004816 * Obtains host_set lock during operation.
Linus Torvalds1da177e2005-04-16 15:20:36 -07004817 *
4818 * RETURNS:
Jeff Garzik0cba6322005-05-30 19:49:12 -04004819 * IRQ_NONE or IRQ_HANDLED.
Linus Torvalds1da177e2005-04-16 15:20:36 -07004820 */
4821
4822irqreturn_t ata_interrupt (int irq, void *dev_instance, struct pt_regs *regs)
4823{
4824 struct ata_host_set *host_set = dev_instance;
4825 unsigned int i;
4826 unsigned int handled = 0;
4827 unsigned long flags;
4828
4829 /* TODO: make _irqsave conditional on x86 PCI IDE legacy mode */
4830 spin_lock_irqsave(&host_set->lock, flags);
4831
4832 for (i = 0; i < host_set->n_ports; i++) {
4833 struct ata_port *ap;
4834
4835 ap = host_set->ports[i];
Tejun Heoc1389502005-08-22 14:59:24 +09004836 if (ap &&
Jeff Garzik029f5462006-04-02 10:30:40 -04004837 !(ap->flags & ATA_FLAG_DISABLED)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07004838 struct ata_queued_cmd *qc;
4839
4840 qc = ata_qc_from_tag(ap, ap->active_tag);
Albert Lee312f7da2005-09-27 17:38:03 +08004841 if (qc && (!(qc->tf.flags & ATA_TFLAG_POLLING)) &&
Albert Lee21b1ed72005-04-29 17:34:59 +08004842 (qc->flags & ATA_QCFLAG_ACTIVE))
Linus Torvalds1da177e2005-04-16 15:20:36 -07004843 handled |= ata_host_intr(ap, qc);
4844 }
4845 }
4846
4847 spin_unlock_irqrestore(&host_set->lock, flags);
4848
4849 return IRQ_RETVAL(handled);
4850}
4851
Tejun Heo34bf2172006-05-15 20:57:46 +09004852/**
4853 * sata_scr_valid - test whether SCRs are accessible
4854 * @ap: ATA port to test SCR accessibility for
4855 *
4856 * Test whether SCRs are accessible for @ap.
4857 *
4858 * LOCKING:
4859 * None.
4860 *
4861 * RETURNS:
4862 * 1 if SCRs are accessible, 0 otherwise.
4863 */
4864int sata_scr_valid(struct ata_port *ap)
4865{
4866 return ap->cbl == ATA_CBL_SATA && ap->ops->scr_read;
4867}
4868
4869/**
4870 * sata_scr_read - read SCR register of the specified port
4871 * @ap: ATA port to read SCR for
4872 * @reg: SCR to read
4873 * @val: Place to store read value
4874 *
4875 * Read SCR register @reg of @ap into *@val. This function is
4876 * guaranteed to succeed if the cable type of the port is SATA
4877 * and the port implements ->scr_read.
4878 *
4879 * LOCKING:
4880 * None.
4881 *
4882 * RETURNS:
4883 * 0 on success, negative errno on failure.
4884 */
4885int sata_scr_read(struct ata_port *ap, int reg, u32 *val)
4886{
4887 if (sata_scr_valid(ap)) {
4888 *val = ap->ops->scr_read(ap, reg);
4889 return 0;
4890 }
4891 return -EOPNOTSUPP;
4892}
4893
4894/**
4895 * sata_scr_write - write SCR register of the specified port
4896 * @ap: ATA port to write SCR for
4897 * @reg: SCR to write
4898 * @val: value to write
4899 *
4900 * Write @val to SCR register @reg of @ap. This function is
4901 * guaranteed to succeed if the cable type of the port is SATA
4902 * and the port implements ->scr_read.
4903 *
4904 * LOCKING:
4905 * None.
4906 *
4907 * RETURNS:
4908 * 0 on success, negative errno on failure.
4909 */
4910int sata_scr_write(struct ata_port *ap, int reg, u32 val)
4911{
4912 if (sata_scr_valid(ap)) {
4913 ap->ops->scr_write(ap, reg, val);
4914 return 0;
4915 }
4916 return -EOPNOTSUPP;
4917}
4918
4919/**
4920 * sata_scr_write_flush - write SCR register of the specified port and flush
4921 * @ap: ATA port to write SCR for
4922 * @reg: SCR to write
4923 * @val: value to write
4924 *
4925 * This function is identical to sata_scr_write() except that this
4926 * function performs flush after writing to the register.
4927 *
4928 * LOCKING:
4929 * None.
4930 *
4931 * RETURNS:
4932 * 0 on success, negative errno on failure.
4933 */
4934int sata_scr_write_flush(struct ata_port *ap, int reg, u32 val)
4935{
4936 if (sata_scr_valid(ap)) {
4937 ap->ops->scr_write(ap, reg, val);
4938 ap->ops->scr_read(ap, reg);
4939 return 0;
4940 }
4941 return -EOPNOTSUPP;
4942}
4943
4944/**
4945 * ata_port_online - test whether the given port is online
4946 * @ap: ATA port to test
4947 *
4948 * Test whether @ap is online. Note that this function returns 0
4949 * if online status of @ap cannot be obtained, so
4950 * ata_port_online(ap) != !ata_port_offline(ap).
4951 *
4952 * LOCKING:
4953 * None.
4954 *
4955 * RETURNS:
4956 * 1 if the port online status is available and online.
4957 */
4958int ata_port_online(struct ata_port *ap)
4959{
4960 u32 sstatus;
4961
4962 if (!sata_scr_read(ap, SCR_STATUS, &sstatus) && (sstatus & 0xf) == 0x3)
4963 return 1;
4964 return 0;
4965}
4966
4967/**
4968 * ata_port_offline - test whether the given port is offline
4969 * @ap: ATA port to test
4970 *
4971 * Test whether @ap is offline. Note that this function returns
4972 * 0 if offline status of @ap cannot be obtained, so
4973 * ata_port_online(ap) != !ata_port_offline(ap).
4974 *
4975 * LOCKING:
4976 * None.
4977 *
4978 * RETURNS:
4979 * 1 if the port offline status is available and offline.
4980 */
4981int ata_port_offline(struct ata_port *ap)
4982{
4983 u32 sstatus;
4984
4985 if (!sata_scr_read(ap, SCR_STATUS, &sstatus) && (sstatus & 0xf) != 0x3)
4986 return 1;
4987 return 0;
4988}
Edward Falk0baab862005-06-02 18:17:13 -04004989
Tejun Heo77b08fb2006-06-24 20:30:19 +09004990int ata_flush_cache(struct ata_device *dev)
Jens Axboe9b847542006-01-06 09:28:07 +01004991{
Tejun Heo977e6b92006-06-24 20:30:19 +09004992 unsigned int err_mask;
Jens Axboe9b847542006-01-06 09:28:07 +01004993 u8 cmd;
4994
4995 if (!ata_try_flush_cache(dev))
4996 return 0;
4997
4998 if (ata_id_has_flush_ext(dev->id))
4999 cmd = ATA_CMD_FLUSH_EXT;
5000 else
5001 cmd = ATA_CMD_FLUSH;
5002
Tejun Heo977e6b92006-06-24 20:30:19 +09005003 err_mask = ata_do_simple_cmd(dev, cmd);
5004 if (err_mask) {
5005 ata_dev_printk(dev, KERN_ERR, "failed to flush cache\n");
5006 return -EIO;
5007 }
5008
5009 return 0;
Jens Axboe9b847542006-01-06 09:28:07 +01005010}
5011
Tejun Heo500530f2006-07-03 16:07:27 +09005012static int ata_host_set_request_pm(struct ata_host_set *host_set,
5013 pm_message_t mesg, unsigned int action,
5014 unsigned int ehi_flags, int wait)
5015{
5016 unsigned long flags;
5017 int i, rc;
5018
5019 for (i = 0; i < host_set->n_ports; i++) {
5020 struct ata_port *ap = host_set->ports[i];
5021
5022 /* Previous resume operation might still be in
5023 * progress. Wait for PM_PENDING to clear.
5024 */
5025 if (ap->pflags & ATA_PFLAG_PM_PENDING) {
5026 ata_port_wait_eh(ap);
5027 WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING);
5028 }
5029
5030 /* request PM ops to EH */
5031 spin_lock_irqsave(ap->lock, flags);
5032
5033 ap->pm_mesg = mesg;
5034 if (wait) {
5035 rc = 0;
5036 ap->pm_result = &rc;
5037 }
5038
5039 ap->pflags |= ATA_PFLAG_PM_PENDING;
5040 ap->eh_info.action |= action;
5041 ap->eh_info.flags |= ehi_flags;
5042
5043 ata_port_schedule_eh(ap);
5044
5045 spin_unlock_irqrestore(ap->lock, flags);
5046
5047 /* wait and check result */
5048 if (wait) {
5049 ata_port_wait_eh(ap);
5050 WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING);
5051 if (rc)
5052 return rc;
5053 }
5054 }
5055
5056 return 0;
5057}
5058
5059/**
5060 * ata_host_set_suspend - suspend host_set
5061 * @host_set: host_set to suspend
5062 * @mesg: PM message
5063 *
5064 * Suspend @host_set. Actual operation is performed by EH. This
5065 * function requests EH to perform PM operations and waits for EH
5066 * to finish.
5067 *
5068 * LOCKING:
5069 * Kernel thread context (may sleep).
5070 *
5071 * RETURNS:
5072 * 0 on success, -errno on failure.
5073 */
5074int ata_host_set_suspend(struct ata_host_set *host_set, pm_message_t mesg)
5075{
5076 int i, j, rc;
5077
5078 rc = ata_host_set_request_pm(host_set, mesg, 0, ATA_EHI_QUIET, 1);
5079 if (rc)
5080 goto fail;
5081
5082 /* EH is quiescent now. Fail if we have any ready device.
5083 * This happens if hotplug occurs between completion of device
5084 * suspension and here.
5085 */
5086 for (i = 0; i < host_set->n_ports; i++) {
5087 struct ata_port *ap = host_set->ports[i];
5088
5089 for (j = 0; j < ATA_MAX_DEVICES; j++) {
5090 struct ata_device *dev = &ap->device[j];
5091
5092 if (ata_dev_ready(dev)) {
5093 ata_port_printk(ap, KERN_WARNING,
5094 "suspend failed, device %d "
5095 "still active\n", dev->devno);
5096 rc = -EBUSY;
5097 goto fail;
5098 }
5099 }
5100 }
5101
5102 host_set->dev->power.power_state = mesg;
5103 return 0;
5104
5105 fail:
5106 ata_host_set_resume(host_set);
5107 return rc;
5108}
5109
5110/**
5111 * ata_host_set_resume - resume host_set
5112 * @host_set: host_set to resume
5113 *
5114 * Resume @host_set. Actual operation is performed by EH. This
5115 * function requests EH to perform PM operations and returns.
5116 * Note that all resume operations are performed parallely.
5117 *
5118 * LOCKING:
5119 * Kernel thread context (may sleep).
5120 */
5121void ata_host_set_resume(struct ata_host_set *host_set)
5122{
5123 ata_host_set_request_pm(host_set, PMSG_ON, ATA_EH_SOFTRESET,
5124 ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET, 0);
5125 host_set->dev->power.power_state = PMSG_ON;
5126}
5127
Randy Dunlapc893a3a2006-01-28 13:15:32 -05005128/**
5129 * ata_port_start - Set port up for dma.
5130 * @ap: Port to initialize
5131 *
5132 * Called just after data structures for each port are
5133 * initialized. Allocates space for PRD table.
5134 *
5135 * May be used as the port_start() entry in ata_port_operations.
5136 *
5137 * LOCKING:
5138 * Inherited from caller.
5139 */
5140
Linus Torvalds1da177e2005-04-16 15:20:36 -07005141int ata_port_start (struct ata_port *ap)
5142{
Brian King2f1f6102006-03-23 17:30:15 -06005143 struct device *dev = ap->dev;
Jeff Garzik6037d6b2005-11-04 22:08:00 -05005144 int rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005145
5146 ap->prd = dma_alloc_coherent(dev, ATA_PRD_TBL_SZ, &ap->prd_dma, GFP_KERNEL);
5147 if (!ap->prd)
5148 return -ENOMEM;
5149
Jeff Garzik6037d6b2005-11-04 22:08:00 -05005150 rc = ata_pad_alloc(ap, dev);
5151 if (rc) {
Jeff Garzikcedc9a42005-10-05 07:13:30 -04005152 dma_free_coherent(dev, ATA_PRD_TBL_SZ, ap->prd, ap->prd_dma);
Jeff Garzik6037d6b2005-11-04 22:08:00 -05005153 return rc;
Jeff Garzikcedc9a42005-10-05 07:13:30 -04005154 }
5155
Linus Torvalds1da177e2005-04-16 15:20:36 -07005156 DPRINTK("prd alloc, virt %p, dma %llx\n", ap->prd, (unsigned long long) ap->prd_dma);
5157
5158 return 0;
5159}
5160
Edward Falk0baab862005-06-02 18:17:13 -04005161
5162/**
5163 * ata_port_stop - Undo ata_port_start()
5164 * @ap: Port to shut down
5165 *
5166 * Frees the PRD table.
5167 *
5168 * May be used as the port_stop() entry in ata_port_operations.
5169 *
5170 * LOCKING:
Randy Dunlap6f0ef4f2005-10-25 01:44:30 -04005171 * Inherited from caller.
Edward Falk0baab862005-06-02 18:17:13 -04005172 */
5173
Linus Torvalds1da177e2005-04-16 15:20:36 -07005174void ata_port_stop (struct ata_port *ap)
5175{
Brian King2f1f6102006-03-23 17:30:15 -06005176 struct device *dev = ap->dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005177
5178 dma_free_coherent(dev, ATA_PRD_TBL_SZ, ap->prd, ap->prd_dma);
Jeff Garzik6037d6b2005-11-04 22:08:00 -05005179 ata_pad_free(ap, dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005180}
5181
Jeff Garzikaa8f0dc2005-05-26 21:54:27 -04005182void ata_host_stop (struct ata_host_set *host_set)
5183{
5184 if (host_set->mmio_base)
5185 iounmap(host_set->mmio_base);
5186}
5187
Linus Torvalds1da177e2005-04-16 15:20:36 -07005188/**
Tejun Heo3ef3b432006-05-31 18:27:30 +09005189 * ata_dev_init - Initialize an ata_device structure
5190 * @dev: Device structure to initialize
5191 *
5192 * Initialize @dev in preparation for probing.
5193 *
5194 * LOCKING:
5195 * Inherited from caller.
5196 */
5197void ata_dev_init(struct ata_device *dev)
5198{
5199 struct ata_port *ap = dev->ap;
Tejun Heo72fa4b72006-05-31 18:27:32 +09005200 unsigned long flags;
Tejun Heo3ef3b432006-05-31 18:27:30 +09005201
Tejun Heo5a04bf42006-05-31 18:27:38 +09005202 /* SATA spd limit is bound to the first device */
5203 ap->sata_spd_limit = ap->hw_sata_spd_limit;
5204
Tejun Heo72fa4b72006-05-31 18:27:32 +09005205 /* High bits of dev->flags are used to record warm plug
5206 * requests which occur asynchronously. Synchronize using
5207 * host_set lock.
5208 */
Jeff Garzikba6a1302006-06-22 23:46:10 -04005209 spin_lock_irqsave(ap->lock, flags);
Tejun Heo72fa4b72006-05-31 18:27:32 +09005210 dev->flags &= ~ATA_DFLAG_INIT_MASK;
Jeff Garzikba6a1302006-06-22 23:46:10 -04005211 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heo72fa4b72006-05-31 18:27:32 +09005212
5213 memset((void *)dev + ATA_DEVICE_CLEAR_OFFSET, 0,
5214 sizeof(*dev) - ATA_DEVICE_CLEAR_OFFSET);
Tejun Heo3ef3b432006-05-31 18:27:30 +09005215 dev->pio_mask = UINT_MAX;
5216 dev->mwdma_mask = UINT_MAX;
5217 dev->udma_mask = UINT_MAX;
5218}
5219
5220/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07005221 * ata_host_init - Initialize an ata_port structure
5222 * @ap: Structure to initialize
5223 * @host: associated SCSI mid-layer structure
5224 * @host_set: Collection of hosts to which @ap belongs
5225 * @ent: Probe information provided by low-level driver
5226 * @port_no: Port number associated with this ata_port
5227 *
Jeff Garzik0cba6322005-05-30 19:49:12 -04005228 * Initialize a new ata_port structure, and its associated
5229 * scsi_host.
5230 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07005231 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04005232 * Inherited from caller.
Linus Torvalds1da177e2005-04-16 15:20:36 -07005233 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07005234static void ata_host_init(struct ata_port *ap, struct Scsi_Host *host,
5235 struct ata_host_set *host_set,
Jeff Garzik057ace52005-10-22 14:27:05 -04005236 const struct ata_probe_ent *ent, unsigned int port_no)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005237{
5238 unsigned int i;
5239
5240 host->max_id = 16;
5241 host->max_lun = 1;
5242 host->max_channel = 1;
5243 host->unique_id = ata_unique_id++;
5244 host->max_cmd_len = 12;
Christoph Hellwig12413192005-06-11 01:05:01 +02005245
Jeff Garzikba6a1302006-06-22 23:46:10 -04005246 ap->lock = &host_set->lock;
Tejun Heo198e0fe2006-04-02 18:51:52 +09005247 ap->flags = ATA_FLAG_DISABLED;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005248 ap->id = host->unique_id;
5249 ap->host = host;
5250 ap->ctl = ATA_DEVCTL_OBS;
5251 ap->host_set = host_set;
Brian King2f1f6102006-03-23 17:30:15 -06005252 ap->dev = ent->dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005253 ap->port_no = port_no;
5254 ap->hard_port_no =
5255 ent->legacy_mode ? ent->hard_port_no : port_no;
5256 ap->pio_mask = ent->pio_mask;
5257 ap->mwdma_mask = ent->mwdma_mask;
5258 ap->udma_mask = ent->udma_mask;
5259 ap->flags |= ent->host_flags;
5260 ap->ops = ent->port_ops;
Tejun Heo5a04bf42006-05-31 18:27:38 +09005261 ap->hw_sata_spd_limit = UINT_MAX;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005262 ap->active_tag = ATA_TAG_POISON;
5263 ap->last_ctl = 0xFF;
Borislav Petkovbd5d8252006-06-11 23:17:01 -04005264
5265#if defined(ATA_VERBOSE_DEBUG)
5266 /* turn on all debugging levels */
5267 ap->msg_enable = 0x00FF;
5268#elif defined(ATA_DEBUG)
5269 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 +09005270#else
Borislav Petkov0dd4b212006-06-23 02:29:08 -04005271 ap->msg_enable = ATA_MSG_DRV | ATA_MSG_ERR | ATA_MSG_WARN;
Borislav Petkovbd5d8252006-06-11 23:17:01 -04005272#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07005273
Tejun Heo86e45b62006-03-05 15:29:09 +09005274 INIT_WORK(&ap->port_task, NULL, NULL);
Tejun Heo580b2102006-05-31 18:28:05 +09005275 INIT_WORK(&ap->hotplug_task, ata_scsi_hotplug, ap);
zhao, forrest3057ac32006-06-12 12:01:34 +08005276 INIT_WORK(&ap->scsi_rescan_task, ata_scsi_dev_rescan, ap);
Tejun Heoa72ec4c2006-01-23 13:09:37 +09005277 INIT_LIST_HEAD(&ap->eh_done_q);
Tejun Heoc6cf9e92006-05-31 18:27:27 +09005278 init_waitqueue_head(&ap->eh_wait_q);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005279
Tejun Heo838df622006-05-15 20:57:44 +09005280 /* set cable type */
5281 ap->cbl = ATA_CBL_NONE;
5282 if (ap->flags & ATA_FLAG_SATA)
5283 ap->cbl = ATA_CBL_SATA;
5284
Tejun Heoacf356b2006-03-24 14:07:50 +09005285 for (i = 0; i < ATA_MAX_DEVICES; i++) {
5286 struct ata_device *dev = &ap->device[i];
Tejun Heo38d87232006-05-15 20:57:51 +09005287 dev->ap = ap;
Tejun Heo72fa4b72006-05-31 18:27:32 +09005288 dev->devno = i;
Tejun Heo3ef3b432006-05-31 18:27:30 +09005289 ata_dev_init(dev);
Tejun Heoacf356b2006-03-24 14:07:50 +09005290 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07005291
5292#ifdef ATA_IRQ_TRAP
5293 ap->stats.unhandled_irq = 1;
5294 ap->stats.idle_irq = 1;
5295#endif
5296
5297 memcpy(&ap->ioaddr, &ent->port[port_no], sizeof(struct ata_ioports));
5298}
5299
5300/**
5301 * ata_host_add - Attach low-level ATA driver to system
5302 * @ent: Information provided by low-level driver
5303 * @host_set: Collections of ports to which we add
5304 * @port_no: Port number associated with this host
5305 *
Jeff Garzik0cba6322005-05-30 19:49:12 -04005306 * Attach low-level ATA driver to system.
5307 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07005308 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04005309 * PCI/etc. bus probe sem.
Linus Torvalds1da177e2005-04-16 15:20:36 -07005310 *
5311 * RETURNS:
Jeff Garzik0cba6322005-05-30 19:49:12 -04005312 * New ata_port on success, for NULL on error.
Linus Torvalds1da177e2005-04-16 15:20:36 -07005313 */
5314
Jeff Garzik057ace52005-10-22 14:27:05 -04005315static struct ata_port * ata_host_add(const struct ata_probe_ent *ent,
Linus Torvalds1da177e2005-04-16 15:20:36 -07005316 struct ata_host_set *host_set,
5317 unsigned int port_no)
5318{
5319 struct Scsi_Host *host;
5320 struct ata_port *ap;
5321 int rc;
5322
5323 DPRINTK("ENTER\n");
Tejun Heoaec5c3c2006-03-25 01:33:34 +09005324
Tejun Heo52783c52006-05-31 18:28:22 +09005325 if (!ent->port_ops->error_handler &&
Tejun Heoaec5c3c2006-03-25 01:33:34 +09005326 !(ent->host_flags & (ATA_FLAG_SATA_RESET | ATA_FLAG_SRST))) {
5327 printk(KERN_ERR "ata%u: no reset mechanism available\n",
5328 port_no);
5329 return NULL;
5330 }
5331
Linus Torvalds1da177e2005-04-16 15:20:36 -07005332 host = scsi_host_alloc(ent->sht, sizeof(struct ata_port));
5333 if (!host)
5334 return NULL;
5335
Tejun Heo30afc842006-03-18 18:40:14 +09005336 host->transportt = &ata_scsi_transport_template;
5337
Jeff Garzik35bb94b2006-04-11 13:12:34 -04005338 ap = ata_shost_to_port(host);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005339
5340 ata_host_init(ap, host, host_set, ent, port_no);
5341
5342 rc = ap->ops->port_start(ap);
5343 if (rc)
5344 goto err_out;
5345
5346 return ap;
5347
5348err_out:
5349 scsi_host_put(host);
5350 return NULL;
5351}
5352
5353/**
Jeff Garzik0cba6322005-05-30 19:49:12 -04005354 * ata_device_add - Register hardware device with ATA and SCSI layers
5355 * @ent: Probe information describing hardware device to be registered
5356 *
5357 * This function processes the information provided in the probe
5358 * information struct @ent, allocates the necessary ATA and SCSI
5359 * host information structures, initializes them, and registers
5360 * everything with requisite kernel subsystems.
5361 *
5362 * This function requests irqs, probes the ATA bus, and probes
5363 * the SCSI bus.
Linus Torvalds1da177e2005-04-16 15:20:36 -07005364 *
5365 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04005366 * PCI/etc. bus probe sem.
Linus Torvalds1da177e2005-04-16 15:20:36 -07005367 *
5368 * RETURNS:
Jeff Garzik0cba6322005-05-30 19:49:12 -04005369 * Number of ports registered. Zero on error (no ports registered).
Linus Torvalds1da177e2005-04-16 15:20:36 -07005370 */
Jeff Garzik057ace52005-10-22 14:27:05 -04005371int ata_device_add(const struct ata_probe_ent *ent)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005372{
5373 unsigned int count = 0, i;
5374 struct device *dev = ent->dev;
5375 struct ata_host_set *host_set;
Jeff Garzik39b07ce2006-06-11 23:59:44 -04005376 int rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005377
5378 DPRINTK("ENTER\n");
5379 /* alloc a container for our list of ATA ports (buses) */
Randy Dunlap57f3bda2005-10-28 20:37:23 -07005380 host_set = kzalloc(sizeof(struct ata_host_set) +
Linus Torvalds1da177e2005-04-16 15:20:36 -07005381 (ent->n_ports * sizeof(void *)), GFP_KERNEL);
5382 if (!host_set)
5383 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005384 spin_lock_init(&host_set->lock);
5385
5386 host_set->dev = dev;
5387 host_set->n_ports = ent->n_ports;
5388 host_set->irq = ent->irq;
5389 host_set->mmio_base = ent->mmio_base;
5390 host_set->private_data = ent->private_data;
5391 host_set->ops = ent->port_ops;
Alan Cox5444a6f2006-03-27 18:58:20 +01005392 host_set->flags = ent->host_set_flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005393
5394 /* register each port bound to this device */
5395 for (i = 0; i < ent->n_ports; i++) {
5396 struct ata_port *ap;
5397 unsigned long xfer_mode_mask;
5398
5399 ap = ata_host_add(ent, host_set, i);
5400 if (!ap)
5401 goto err_out;
5402
5403 host_set->ports[i] = ap;
5404 xfer_mode_mask =(ap->udma_mask << ATA_SHIFT_UDMA) |
5405 (ap->mwdma_mask << ATA_SHIFT_MWDMA) |
5406 (ap->pio_mask << ATA_SHIFT_PIO);
5407
5408 /* print per-port info to dmesg */
Tejun Heof15a1da2006-05-15 20:57:56 +09005409 ata_port_printk(ap, KERN_INFO, "%cATA max %s cmd 0x%lX "
5410 "ctl 0x%lX bmdma 0x%lX irq %lu\n",
5411 ap->flags & ATA_FLAG_SATA ? 'S' : 'P',
5412 ata_mode_string(xfer_mode_mask),
5413 ap->ioaddr.cmd_addr,
5414 ap->ioaddr.ctl_addr,
5415 ap->ioaddr.bmdma_addr,
5416 ent->irq);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005417
5418 ata_chk_status(ap);
5419 host_set->ops->irq_clear(ap);
Tejun Heoe3180492006-05-15 20:58:09 +09005420 ata_eh_freeze_port(ap); /* freeze port before requesting IRQ */
Linus Torvalds1da177e2005-04-16 15:20:36 -07005421 count++;
5422 }
5423
Randy Dunlap57f3bda2005-10-28 20:37:23 -07005424 if (!count)
5425 goto err_free_ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005426
5427 /* obtain irq, that is shared between channels */
Jeff Garzik39b07ce2006-06-11 23:59:44 -04005428 rc = request_irq(ent->irq, ent->port_ops->irq_handler, ent->irq_flags,
5429 DRV_NAME, host_set);
5430 if (rc) {
5431 dev_printk(KERN_ERR, dev, "irq %lu request failed: %d\n",
5432 ent->irq, rc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005433 goto err_out;
Jeff Garzik39b07ce2006-06-11 23:59:44 -04005434 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07005435
5436 /* perform each probe synchronously */
5437 DPRINTK("probe begin\n");
5438 for (i = 0; i < count; i++) {
5439 struct ata_port *ap;
Tejun Heo5a04bf42006-05-31 18:27:38 +09005440 u32 scontrol;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005441 int rc;
5442
5443 ap = host_set->ports[i];
5444
Tejun Heo5a04bf42006-05-31 18:27:38 +09005445 /* init sata_spd_limit to the current value */
5446 if (sata_scr_read(ap, SCR_CONTROL, &scontrol) == 0) {
5447 int spd = (scontrol >> 4) & 0xf;
5448 ap->hw_sata_spd_limit &= (1 << spd) - 1;
5449 }
5450 ap->sata_spd_limit = ap->hw_sata_spd_limit;
5451
Linus Torvalds1da177e2005-04-16 15:20:36 -07005452 rc = scsi_add_host(ap->host, dev);
5453 if (rc) {
Tejun Heof15a1da2006-05-15 20:57:56 +09005454 ata_port_printk(ap, KERN_ERR, "scsi_add_host failed\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07005455 /* FIXME: do something useful here */
5456 /* FIXME: handle unconditional calls to
5457 * scsi_scan_host and ata_host_remove, below,
5458 * at the very least
5459 */
5460 }
Tejun Heo3e706392006-05-31 18:28:11 +09005461
Tejun Heo52783c52006-05-31 18:28:22 +09005462 if (ap->ops->error_handler) {
Tejun Heo1cdaf532006-07-03 16:07:26 +09005463 struct ata_eh_info *ehi = &ap->eh_info;
Tejun Heo3e706392006-05-31 18:28:11 +09005464 unsigned long flags;
5465
5466 ata_port_probe(ap);
5467
5468 /* kick EH for boot probing */
Jeff Garzikba6a1302006-06-22 23:46:10 -04005469 spin_lock_irqsave(ap->lock, flags);
Tejun Heo3e706392006-05-31 18:28:11 +09005470
Tejun Heo1cdaf532006-07-03 16:07:26 +09005471 ehi->probe_mask = (1 << ATA_MAX_DEVICES) - 1;
5472 ehi->action |= ATA_EH_SOFTRESET;
5473 ehi->flags |= ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET;
Tejun Heo3e706392006-05-31 18:28:11 +09005474
Tejun Heob51e9e52006-06-29 01:29:30 +09005475 ap->pflags |= ATA_PFLAG_LOADING;
Tejun Heo3e706392006-05-31 18:28:11 +09005476 ata_port_schedule_eh(ap);
5477
Jeff Garzikba6a1302006-06-22 23:46:10 -04005478 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heo3e706392006-05-31 18:28:11 +09005479
5480 /* wait for EH to finish */
5481 ata_port_wait_eh(ap);
5482 } else {
5483 DPRINTK("ata%u: bus probe begin\n", ap->id);
5484 rc = ata_bus_probe(ap);
5485 DPRINTK("ata%u: bus probe end\n", ap->id);
5486
5487 if (rc) {
5488 /* FIXME: do something useful here?
5489 * Current libata behavior will
5490 * tear down everything when
5491 * the module is removed
5492 * or the h/w is unplugged.
5493 */
5494 }
5495 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07005496 }
5497
5498 /* probes are done, now scan each port's disk(s) */
Randy Dunlapc893a3a2006-01-28 13:15:32 -05005499 DPRINTK("host probe begin\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07005500 for (i = 0; i < count; i++) {
5501 struct ata_port *ap = host_set->ports[i];
5502
Jeff Garzik644dd0c2005-10-03 15:55:19 -04005503 ata_scsi_scan_host(ap);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005504 }
5505
5506 dev_set_drvdata(dev, host_set);
5507
5508 VPRINTK("EXIT, returning %u\n", ent->n_ports);
5509 return ent->n_ports; /* success */
5510
5511err_out:
5512 for (i = 0; i < count; i++) {
Jeff Garzik6543bc02006-08-05 03:59:17 +09005513 struct ata_port *ap = host_set->ports[i];
Tejun Heo77f3f872006-08-05 03:59:19 +09005514 if (ap) {
5515 ap->ops->port_stop(ap);
5516 scsi_host_put(ap->host);
5517 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07005518 }
Randy Dunlap57f3bda2005-10-28 20:37:23 -07005519err_free_ret:
Linus Torvalds1da177e2005-04-16 15:20:36 -07005520 kfree(host_set);
5521 VPRINTK("EXIT, returning 0\n");
5522 return 0;
5523}
5524
5525/**
Tejun Heo720ba122006-05-31 18:28:13 +09005526 * ata_port_detach - Detach ATA port in prepration of device removal
5527 * @ap: ATA port to be detached
5528 *
5529 * Detach all ATA devices and the associated SCSI devices of @ap;
5530 * then, remove the associated SCSI host. @ap is guaranteed to
5531 * be quiescent on return from this function.
5532 *
5533 * LOCKING:
5534 * Kernel thread context (may sleep).
5535 */
5536void ata_port_detach(struct ata_port *ap)
5537{
5538 unsigned long flags;
5539 int i;
5540
5541 if (!ap->ops->error_handler)
Tejun Heoc3cf30a2006-08-05 03:59:11 +09005542 goto skip_eh;
Tejun Heo720ba122006-05-31 18:28:13 +09005543
5544 /* tell EH we're leaving & flush EH */
Jeff Garzikba6a1302006-06-22 23:46:10 -04005545 spin_lock_irqsave(ap->lock, flags);
Tejun Heob51e9e52006-06-29 01:29:30 +09005546 ap->pflags |= ATA_PFLAG_UNLOADING;
Jeff Garzikba6a1302006-06-22 23:46:10 -04005547 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heo720ba122006-05-31 18:28:13 +09005548
5549 ata_port_wait_eh(ap);
5550
5551 /* EH is now guaranteed to see UNLOADING, so no new device
5552 * will be attached. Disable all existing devices.
5553 */
Jeff Garzikba6a1302006-06-22 23:46:10 -04005554 spin_lock_irqsave(ap->lock, flags);
Tejun Heo720ba122006-05-31 18:28:13 +09005555
5556 for (i = 0; i < ATA_MAX_DEVICES; i++)
5557 ata_dev_disable(&ap->device[i]);
5558
Jeff Garzikba6a1302006-06-22 23:46:10 -04005559 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heo720ba122006-05-31 18:28:13 +09005560
5561 /* Final freeze & EH. All in-flight commands are aborted. EH
5562 * will be skipped and retrials will be terminated with bad
5563 * target.
5564 */
Jeff Garzikba6a1302006-06-22 23:46:10 -04005565 spin_lock_irqsave(ap->lock, flags);
Tejun Heo720ba122006-05-31 18:28:13 +09005566 ata_port_freeze(ap); /* won't be thawed */
Jeff Garzikba6a1302006-06-22 23:46:10 -04005567 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heo720ba122006-05-31 18:28:13 +09005568
5569 ata_port_wait_eh(ap);
5570
5571 /* Flush hotplug task. The sequence is similar to
5572 * ata_port_flush_task().
5573 */
5574 flush_workqueue(ata_aux_wq);
5575 cancel_delayed_work(&ap->hotplug_task);
5576 flush_workqueue(ata_aux_wq);
5577
Tejun Heoc3cf30a2006-08-05 03:59:11 +09005578 skip_eh:
Tejun Heo720ba122006-05-31 18:28:13 +09005579 /* remove the associated SCSI host */
5580 scsi_remove_host(ap->host);
5581}
5582
5583/**
Alan Cox17b14452005-09-15 15:44:00 +01005584 * ata_host_set_remove - PCI layer callback for device removal
5585 * @host_set: ATA host set that was removed
5586 *
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05005587 * Unregister all objects associated with this host set. Free those
Alan Cox17b14452005-09-15 15:44:00 +01005588 * objects.
5589 *
5590 * LOCKING:
5591 * Inherited from calling layer (may sleep).
5592 */
5593
Alan Cox17b14452005-09-15 15:44:00 +01005594void ata_host_set_remove(struct ata_host_set *host_set)
5595{
Alan Cox17b14452005-09-15 15:44:00 +01005596 unsigned int i;
5597
Tejun Heo720ba122006-05-31 18:28:13 +09005598 for (i = 0; i < host_set->n_ports; i++)
5599 ata_port_detach(host_set->ports[i]);
Alan Cox17b14452005-09-15 15:44:00 +01005600
5601 free_irq(host_set->irq, host_set);
5602
5603 for (i = 0; i < host_set->n_ports; i++) {
Tejun Heo720ba122006-05-31 18:28:13 +09005604 struct ata_port *ap = host_set->ports[i];
Alan Cox17b14452005-09-15 15:44:00 +01005605
5606 ata_scsi_release(ap->host);
5607
5608 if ((ap->flags & ATA_FLAG_NO_LEGACY) == 0) {
5609 struct ata_ioports *ioaddr = &ap->ioaddr;
5610
5611 if (ioaddr->cmd_addr == 0x1f0)
5612 release_region(0x1f0, 8);
5613 else if (ioaddr->cmd_addr == 0x170)
5614 release_region(0x170, 8);
5615 }
5616
5617 scsi_host_put(ap->host);
5618 }
5619
5620 if (host_set->ops->host_stop)
5621 host_set->ops->host_stop(host_set);
5622
5623 kfree(host_set);
5624}
5625
5626/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07005627 * ata_scsi_release - SCSI layer callback hook for host unload
5628 * @host: libata host to be unloaded
5629 *
5630 * Performs all duties necessary to shut down a libata port...
5631 * Kill port kthread, disable port, and release resources.
5632 *
5633 * LOCKING:
5634 * Inherited from SCSI layer.
5635 *
5636 * RETURNS:
5637 * One.
5638 */
5639
5640int ata_scsi_release(struct Scsi_Host *host)
5641{
Jeff Garzik35bb94b2006-04-11 13:12:34 -04005642 struct ata_port *ap = ata_shost_to_port(host);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005643
5644 DPRINTK("ENTER\n");
5645
5646 ap->ops->port_disable(ap);
Jeff Garzik6543bc02006-08-05 03:59:17 +09005647 ap->ops->port_stop(ap);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005648
5649 DPRINTK("EXIT\n");
5650 return 1;
5651}
5652
5653/**
5654 * ata_std_ports - initialize ioaddr with standard port offsets.
5655 * @ioaddr: IO address structure to be initialized
Edward Falk0baab862005-06-02 18:17:13 -04005656 *
5657 * Utility function which initializes data_addr, error_addr,
5658 * feature_addr, nsect_addr, lbal_addr, lbam_addr, lbah_addr,
5659 * device_addr, status_addr, and command_addr to standard offsets
5660 * relative to cmd_addr.
5661 *
5662 * Does not set ctl_addr, altstatus_addr, bmdma_addr, or scr_addr.
Linus Torvalds1da177e2005-04-16 15:20:36 -07005663 */
Edward Falk0baab862005-06-02 18:17:13 -04005664
Linus Torvalds1da177e2005-04-16 15:20:36 -07005665void ata_std_ports(struct ata_ioports *ioaddr)
5666{
5667 ioaddr->data_addr = ioaddr->cmd_addr + ATA_REG_DATA;
5668 ioaddr->error_addr = ioaddr->cmd_addr + ATA_REG_ERR;
5669 ioaddr->feature_addr = ioaddr->cmd_addr + ATA_REG_FEATURE;
5670 ioaddr->nsect_addr = ioaddr->cmd_addr + ATA_REG_NSECT;
5671 ioaddr->lbal_addr = ioaddr->cmd_addr + ATA_REG_LBAL;
5672 ioaddr->lbam_addr = ioaddr->cmd_addr + ATA_REG_LBAM;
5673 ioaddr->lbah_addr = ioaddr->cmd_addr + ATA_REG_LBAH;
5674 ioaddr->device_addr = ioaddr->cmd_addr + ATA_REG_DEVICE;
5675 ioaddr->status_addr = ioaddr->cmd_addr + ATA_REG_STATUS;
5676 ioaddr->command_addr = ioaddr->cmd_addr + ATA_REG_CMD;
5677}
5678
Edward Falk0baab862005-06-02 18:17:13 -04005679
Jeff Garzik374b1872005-08-30 05:42:52 -04005680#ifdef CONFIG_PCI
5681
5682void ata_pci_host_stop (struct ata_host_set *host_set)
5683{
5684 struct pci_dev *pdev = to_pci_dev(host_set->dev);
5685
5686 pci_iounmap(pdev, host_set->mmio_base);
5687}
5688
Edward Falk0baab862005-06-02 18:17:13 -04005689/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07005690 * ata_pci_remove_one - PCI layer callback for device removal
5691 * @pdev: PCI device that was removed
5692 *
5693 * PCI layer indicates to libata via this hook that
Randy Dunlap6f0ef4f2005-10-25 01:44:30 -04005694 * hot-unplug or module unload event has occurred.
Linus Torvalds1da177e2005-04-16 15:20:36 -07005695 * Handle this by unregistering all objects associated
5696 * with this PCI device. Free those objects. Then finally
5697 * release PCI resources and disable device.
5698 *
5699 * LOCKING:
5700 * Inherited from PCI layer (may sleep).
5701 */
5702
5703void ata_pci_remove_one (struct pci_dev *pdev)
5704{
5705 struct device *dev = pci_dev_to_dev(pdev);
5706 struct ata_host_set *host_set = dev_get_drvdata(dev);
Tejun Heof0eb62b2006-06-12 23:05:38 +09005707 struct ata_host_set *host_set2 = host_set->next;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005708
Alan Cox17b14452005-09-15 15:44:00 +01005709 ata_host_set_remove(host_set);
Tejun Heof0eb62b2006-06-12 23:05:38 +09005710 if (host_set2)
5711 ata_host_set_remove(host_set2);
5712
Linus Torvalds1da177e2005-04-16 15:20:36 -07005713 pci_release_regions(pdev);
5714 pci_disable_device(pdev);
5715 dev_set_drvdata(dev, NULL);
5716}
5717
5718/* move to PCI subsystem */
Jeff Garzik057ace52005-10-22 14:27:05 -04005719int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005720{
5721 unsigned long tmp = 0;
5722
5723 switch (bits->width) {
5724 case 1: {
5725 u8 tmp8 = 0;
5726 pci_read_config_byte(pdev, bits->reg, &tmp8);
5727 tmp = tmp8;
5728 break;
5729 }
5730 case 2: {
5731 u16 tmp16 = 0;
5732 pci_read_config_word(pdev, bits->reg, &tmp16);
5733 tmp = tmp16;
5734 break;
5735 }
5736 case 4: {
5737 u32 tmp32 = 0;
5738 pci_read_config_dword(pdev, bits->reg, &tmp32);
5739 tmp = tmp32;
5740 break;
5741 }
5742
5743 default:
5744 return -EINVAL;
5745 }
5746
5747 tmp &= bits->mask;
5748
5749 return (tmp == bits->val) ? 1 : 0;
5750}
Jens Axboe9b847542006-01-06 09:28:07 +01005751
Tejun Heo500530f2006-07-03 16:07:27 +09005752void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t state)
Jens Axboe9b847542006-01-06 09:28:07 +01005753{
5754 pci_save_state(pdev);
Tejun Heo500530f2006-07-03 16:07:27 +09005755
5756 if (state.event == PM_EVENT_SUSPEND) {
5757 pci_disable_device(pdev);
5758 pci_set_power_state(pdev, PCI_D3hot);
5759 }
Jens Axboe9b847542006-01-06 09:28:07 +01005760}
5761
Tejun Heo500530f2006-07-03 16:07:27 +09005762void ata_pci_device_do_resume(struct pci_dev *pdev)
Jens Axboe9b847542006-01-06 09:28:07 +01005763{
5764 pci_set_power_state(pdev, PCI_D0);
5765 pci_restore_state(pdev);
5766 pci_enable_device(pdev);
5767 pci_set_master(pdev);
Tejun Heo500530f2006-07-03 16:07:27 +09005768}
5769
5770int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t state)
5771{
5772 struct ata_host_set *host_set = dev_get_drvdata(&pdev->dev);
5773 int rc = 0;
5774
5775 rc = ata_host_set_suspend(host_set, state);
5776 if (rc)
5777 return rc;
5778
5779 if (host_set->next) {
5780 rc = ata_host_set_suspend(host_set->next, state);
5781 if (rc) {
5782 ata_host_set_resume(host_set);
5783 return rc;
5784 }
5785 }
5786
5787 ata_pci_device_do_suspend(pdev, state);
5788
5789 return 0;
5790}
5791
5792int ata_pci_device_resume(struct pci_dev *pdev)
5793{
5794 struct ata_host_set *host_set = dev_get_drvdata(&pdev->dev);
5795
5796 ata_pci_device_do_resume(pdev);
5797 ata_host_set_resume(host_set);
5798 if (host_set->next)
5799 ata_host_set_resume(host_set->next);
5800
Jens Axboe9b847542006-01-06 09:28:07 +01005801 return 0;
5802}
Linus Torvalds1da177e2005-04-16 15:20:36 -07005803#endif /* CONFIG_PCI */
5804
5805
Linus Torvalds1da177e2005-04-16 15:20:36 -07005806static int __init ata_init(void)
5807{
Andrew Mortona8601e52006-06-25 01:36:52 -07005808 ata_probe_timeout *= HZ;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005809 ata_wq = create_workqueue("ata");
5810 if (!ata_wq)
5811 return -ENOMEM;
5812
Tejun Heo453b07a2006-05-31 18:27:42 +09005813 ata_aux_wq = create_singlethread_workqueue("ata_aux");
5814 if (!ata_aux_wq) {
5815 destroy_workqueue(ata_wq);
5816 return -ENOMEM;
5817 }
5818
Linus Torvalds1da177e2005-04-16 15:20:36 -07005819 printk(KERN_DEBUG "libata version " DRV_VERSION " loaded.\n");
5820 return 0;
5821}
5822
5823static void __exit ata_exit(void)
5824{
5825 destroy_workqueue(ata_wq);
Tejun Heo453b07a2006-05-31 18:27:42 +09005826 destroy_workqueue(ata_aux_wq);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005827}
5828
5829module_init(ata_init);
5830module_exit(ata_exit);
5831
Jeff Garzik67846b32005-10-05 02:58:32 -04005832static unsigned long ratelimit_time;
Ingo Molnar34af9462006-06-27 02:53:55 -07005833static DEFINE_SPINLOCK(ata_ratelimit_lock);
Jeff Garzik67846b32005-10-05 02:58:32 -04005834
5835int ata_ratelimit(void)
5836{
5837 int rc;
5838 unsigned long flags;
5839
5840 spin_lock_irqsave(&ata_ratelimit_lock, flags);
5841
5842 if (time_after(jiffies, ratelimit_time)) {
5843 rc = 1;
5844 ratelimit_time = jiffies + (HZ/5);
5845 } else
5846 rc = 0;
5847
5848 spin_unlock_irqrestore(&ata_ratelimit_lock, flags);
5849
5850 return rc;
5851}
5852
Tejun Heoc22daff2006-04-11 22:22:29 +09005853/**
5854 * ata_wait_register - wait until register value changes
5855 * @reg: IO-mapped register
5856 * @mask: Mask to apply to read register value
5857 * @val: Wait condition
5858 * @interval_msec: polling interval in milliseconds
5859 * @timeout_msec: timeout in milliseconds
5860 *
5861 * Waiting for some bits of register to change is a common
5862 * operation for ATA controllers. This function reads 32bit LE
5863 * IO-mapped register @reg and tests for the following condition.
5864 *
5865 * (*@reg & mask) != val
5866 *
5867 * If the condition is met, it returns; otherwise, the process is
5868 * repeated after @interval_msec until timeout.
5869 *
5870 * LOCKING:
5871 * Kernel thread context (may sleep)
5872 *
5873 * RETURNS:
5874 * The final register value.
5875 */
5876u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val,
5877 unsigned long interval_msec,
5878 unsigned long timeout_msec)
5879{
5880 unsigned long timeout;
5881 u32 tmp;
5882
5883 tmp = ioread32(reg);
5884
5885 /* Calculate timeout _after_ the first read to make sure
5886 * preceding writes reach the controller before starting to
5887 * eat away the timeout.
5888 */
5889 timeout = jiffies + (timeout_msec * HZ) / 1000;
5890
5891 while ((tmp & mask) == val && time_before(jiffies, timeout)) {
5892 msleep(interval_msec);
5893 tmp = ioread32(reg);
5894 }
5895
5896 return tmp;
5897}
5898
Linus Torvalds1da177e2005-04-16 15:20:36 -07005899/*
5900 * libata is essentially a library of internal helper functions for
5901 * low-level ATA host controller drivers. As such, the API/ABI is
5902 * likely to change as new drivers are added and updated.
5903 * Do not depend on ABI/API stability.
5904 */
5905
Tejun Heoe9c83912006-07-03 16:07:26 +09005906EXPORT_SYMBOL_GPL(sata_deb_timing_normal);
5907EXPORT_SYMBOL_GPL(sata_deb_timing_hotplug);
5908EXPORT_SYMBOL_GPL(sata_deb_timing_long);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005909EXPORT_SYMBOL_GPL(ata_std_bios_param);
5910EXPORT_SYMBOL_GPL(ata_std_ports);
5911EXPORT_SYMBOL_GPL(ata_device_add);
Tejun Heo720ba122006-05-31 18:28:13 +09005912EXPORT_SYMBOL_GPL(ata_port_detach);
Alan Cox17b14452005-09-15 15:44:00 +01005913EXPORT_SYMBOL_GPL(ata_host_set_remove);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005914EXPORT_SYMBOL_GPL(ata_sg_init);
5915EXPORT_SYMBOL_GPL(ata_sg_init_one);
Tejun Heo9a1004d2006-05-31 18:27:52 +09005916EXPORT_SYMBOL_GPL(ata_hsm_move);
Tejun Heof686bcb2006-05-15 20:58:05 +09005917EXPORT_SYMBOL_GPL(ata_qc_complete);
Tejun Heodedaf2b2006-05-15 21:03:43 +09005918EXPORT_SYMBOL_GPL(ata_qc_complete_multiple);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005919EXPORT_SYMBOL_GPL(ata_qc_issue_prot);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005920EXPORT_SYMBOL_GPL(ata_tf_load);
5921EXPORT_SYMBOL_GPL(ata_tf_read);
5922EXPORT_SYMBOL_GPL(ata_noop_dev_select);
5923EXPORT_SYMBOL_GPL(ata_std_dev_select);
5924EXPORT_SYMBOL_GPL(ata_tf_to_fis);
5925EXPORT_SYMBOL_GPL(ata_tf_from_fis);
5926EXPORT_SYMBOL_GPL(ata_check_status);
5927EXPORT_SYMBOL_GPL(ata_altstatus);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005928EXPORT_SYMBOL_GPL(ata_exec_command);
5929EXPORT_SYMBOL_GPL(ata_port_start);
5930EXPORT_SYMBOL_GPL(ata_port_stop);
Jeff Garzikaa8f0dc2005-05-26 21:54:27 -04005931EXPORT_SYMBOL_GPL(ata_host_stop);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005932EXPORT_SYMBOL_GPL(ata_interrupt);
Alan Coxa6b2c5d2006-05-22 16:59:59 +01005933EXPORT_SYMBOL_GPL(ata_mmio_data_xfer);
5934EXPORT_SYMBOL_GPL(ata_pio_data_xfer);
Alan Cox75e99582006-05-24 14:14:41 +01005935EXPORT_SYMBOL_GPL(ata_pio_data_xfer_noirq);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005936EXPORT_SYMBOL_GPL(ata_qc_prep);
Brian Kinge46834c2006-03-17 17:04:03 -06005937EXPORT_SYMBOL_GPL(ata_noop_qc_prep);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005938EXPORT_SYMBOL_GPL(ata_bmdma_setup);
5939EXPORT_SYMBOL_GPL(ata_bmdma_start);
5940EXPORT_SYMBOL_GPL(ata_bmdma_irq_clear);
5941EXPORT_SYMBOL_GPL(ata_bmdma_status);
5942EXPORT_SYMBOL_GPL(ata_bmdma_stop);
Tejun Heo6d97dbd2006-05-15 20:58:24 +09005943EXPORT_SYMBOL_GPL(ata_bmdma_freeze);
5944EXPORT_SYMBOL_GPL(ata_bmdma_thaw);
5945EXPORT_SYMBOL_GPL(ata_bmdma_drive_eh);
5946EXPORT_SYMBOL_GPL(ata_bmdma_error_handler);
5947EXPORT_SYMBOL_GPL(ata_bmdma_post_internal_cmd);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005948EXPORT_SYMBOL_GPL(ata_port_probe);
Tejun Heo3c567b72006-05-15 20:57:23 +09005949EXPORT_SYMBOL_GPL(sata_set_spd);
Tejun Heod7bb4cc2006-05-31 18:27:46 +09005950EXPORT_SYMBOL_GPL(sata_phy_debounce);
5951EXPORT_SYMBOL_GPL(sata_phy_resume);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005952EXPORT_SYMBOL_GPL(sata_phy_reset);
5953EXPORT_SYMBOL_GPL(__sata_phy_reset);
5954EXPORT_SYMBOL_GPL(ata_bus_reset);
Tejun Heof5914a42006-05-31 18:27:48 +09005955EXPORT_SYMBOL_GPL(ata_std_prereset);
Tejun Heoc2bd5802006-01-24 17:05:22 +09005956EXPORT_SYMBOL_GPL(ata_std_softreset);
5957EXPORT_SYMBOL_GPL(sata_std_hardreset);
5958EXPORT_SYMBOL_GPL(ata_std_postreset);
Tejun Heo623a3122006-03-05 17:55:58 +09005959EXPORT_SYMBOL_GPL(ata_dev_revalidate);
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05005960EXPORT_SYMBOL_GPL(ata_dev_classify);
5961EXPORT_SYMBOL_GPL(ata_dev_pair);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005962EXPORT_SYMBOL_GPL(ata_port_disable);
Jeff Garzik67846b32005-10-05 02:58:32 -04005963EXPORT_SYMBOL_GPL(ata_ratelimit);
Tejun Heoc22daff2006-04-11 22:22:29 +09005964EXPORT_SYMBOL_GPL(ata_wait_register);
Tejun Heo6f8b9952006-01-24 17:05:21 +09005965EXPORT_SYMBOL_GPL(ata_busy_sleep);
Tejun Heo86e45b62006-03-05 15:29:09 +09005966EXPORT_SYMBOL_GPL(ata_port_queue_task);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005967EXPORT_SYMBOL_GPL(ata_scsi_ioctl);
5968EXPORT_SYMBOL_GPL(ata_scsi_queuecmd);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005969EXPORT_SYMBOL_GPL(ata_scsi_slave_config);
Tejun Heo83c47bc2006-05-31 18:28:07 +09005970EXPORT_SYMBOL_GPL(ata_scsi_slave_destroy);
Tejun Heoa6e6ce82006-05-15 21:03:48 +09005971EXPORT_SYMBOL_GPL(ata_scsi_change_queue_depth);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005972EXPORT_SYMBOL_GPL(ata_scsi_release);
5973EXPORT_SYMBOL_GPL(ata_host_intr);
Tejun Heo34bf2172006-05-15 20:57:46 +09005974EXPORT_SYMBOL_GPL(sata_scr_valid);
5975EXPORT_SYMBOL_GPL(sata_scr_read);
5976EXPORT_SYMBOL_GPL(sata_scr_write);
5977EXPORT_SYMBOL_GPL(sata_scr_write_flush);
5978EXPORT_SYMBOL_GPL(ata_port_online);
5979EXPORT_SYMBOL_GPL(ata_port_offline);
Tejun Heo500530f2006-07-03 16:07:27 +09005980EXPORT_SYMBOL_GPL(ata_host_set_suspend);
5981EXPORT_SYMBOL_GPL(ata_host_set_resume);
Tejun Heo6a62a042006-02-13 10:02:46 +09005982EXPORT_SYMBOL_GPL(ata_id_string);
5983EXPORT_SYMBOL_GPL(ata_id_c_string);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005984EXPORT_SYMBOL_GPL(ata_scsi_simulate);
5985
Alan Cox1bc4ccf2006-01-09 17:18:14 +00005986EXPORT_SYMBOL_GPL(ata_pio_need_iordy);
Alan Cox452503f2005-10-21 19:01:32 -04005987EXPORT_SYMBOL_GPL(ata_timing_compute);
5988EXPORT_SYMBOL_GPL(ata_timing_merge);
5989
Linus Torvalds1da177e2005-04-16 15:20:36 -07005990#ifdef CONFIG_PCI
5991EXPORT_SYMBOL_GPL(pci_test_config_bits);
Jeff Garzik374b1872005-08-30 05:42:52 -04005992EXPORT_SYMBOL_GPL(ata_pci_host_stop);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005993EXPORT_SYMBOL_GPL(ata_pci_init_native_mode);
5994EXPORT_SYMBOL_GPL(ata_pci_init_one);
5995EXPORT_SYMBOL_GPL(ata_pci_remove_one);
Tejun Heo500530f2006-07-03 16:07:27 +09005996EXPORT_SYMBOL_GPL(ata_pci_device_do_suspend);
5997EXPORT_SYMBOL_GPL(ata_pci_device_do_resume);
Jens Axboe9b847542006-01-06 09:28:07 +01005998EXPORT_SYMBOL_GPL(ata_pci_device_suspend);
5999EXPORT_SYMBOL_GPL(ata_pci_device_resume);
Alan Cox67951ad2006-03-22 15:55:54 +00006000EXPORT_SYMBOL_GPL(ata_pci_default_filter);
6001EXPORT_SYMBOL_GPL(ata_pci_clear_simplex);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006002#endif /* CONFIG_PCI */
Jens Axboe9b847542006-01-06 09:28:07 +01006003
Jens Axboe9b847542006-01-06 09:28:07 +01006004EXPORT_SYMBOL_GPL(ata_scsi_device_suspend);
6005EXPORT_SYMBOL_GPL(ata_scsi_device_resume);
Tejun Heoece1d632006-04-02 18:51:53 +09006006
Tejun Heoece1d632006-04-02 18:51:53 +09006007EXPORT_SYMBOL_GPL(ata_eng_timeout);
Tejun Heo7b70fc02006-05-15 20:58:07 +09006008EXPORT_SYMBOL_GPL(ata_port_schedule_eh);
6009EXPORT_SYMBOL_GPL(ata_port_abort);
Tejun Heoe3180492006-05-15 20:58:09 +09006010EXPORT_SYMBOL_GPL(ata_port_freeze);
6011EXPORT_SYMBOL_GPL(ata_eh_freeze_port);
6012EXPORT_SYMBOL_GPL(ata_eh_thaw_port);
Tejun Heoece1d632006-04-02 18:51:53 +09006013EXPORT_SYMBOL_GPL(ata_eh_qc_complete);
6014EXPORT_SYMBOL_GPL(ata_eh_qc_retry);
Tejun Heo022bdb02006-05-15 20:58:22 +09006015EXPORT_SYMBOL_GPL(ata_do_eh);