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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Jeff Garzikaf36d7f2005-08-28 20:18:39 -04002 * libata-core.c - helper library for ATA
3 *
4 * Maintained by: Jeff Garzik <jgarzik@pobox.com>
5 * Please ALWAYS copy linux-ide@vger.kernel.org
6 * on emails.
7 *
8 * Copyright 2003-2004 Red Hat, Inc. All rights reserved.
9 * Copyright 2003-2004 Jeff Garzik
10 *
11 *
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2, or (at your option)
15 * any later version.
16 *
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
21 *
22 * You should have received a copy of the GNU General Public License
23 * along with this program; see the file COPYING. If not, write to
24 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
25 *
26 *
27 * libata documentation is available via 'make {ps|pdf}docs',
28 * as Documentation/DocBook/libata.*
29 *
30 * Hardware documentation available from http://www.t13.org/ and
31 * http://www.sata-io.org/
32 *
Linus Torvalds1da177e2005-04-16 15:20:36 -070033 */
34
Linus Torvalds1da177e2005-04-16 15:20:36 -070035#include <linux/kernel.h>
36#include <linux/module.h>
37#include <linux/pci.h>
38#include <linux/init.h>
39#include <linux/list.h>
40#include <linux/mm.h>
41#include <linux/highmem.h>
42#include <linux/spinlock.h>
43#include <linux/blkdev.h>
44#include <linux/delay.h>
45#include <linux/timer.h>
46#include <linux/interrupt.h>
47#include <linux/completion.h>
48#include <linux/suspend.h>
49#include <linux/workqueue.h>
Jeff Garzik67846b32005-10-05 02:58:32 -040050#include <linux/jiffies.h>
David Hardeman378f0582005-09-17 17:55:31 +100051#include <linux/scatterlist.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070052#include <scsi/scsi.h>
Jeff Garzik193515d2005-11-07 00:59:37 -050053#include <scsi/scsi_cmnd.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070054#include <scsi/scsi_host.h>
55#include <linux/libata.h>
56#include <asm/io.h>
57#include <asm/semaphore.h>
58#include <asm/byteorder.h>
59
60#include "libata.h"
61
Tejun Heod7bb4cc2006-05-31 18:27:46 +090062/* debounce timing parameters in msecs { interval, duration, timeout } */
Tejun Heoe9c83912006-07-03 16:07:26 +090063const unsigned long sata_deb_timing_normal[] = { 5, 100, 2000 };
64const unsigned long sata_deb_timing_hotplug[] = { 25, 500, 2000 };
65const unsigned long sata_deb_timing_long[] = { 100, 2000, 5000 };
Tejun Heod7bb4cc2006-05-31 18:27:46 +090066
Tejun Heo3373efd2006-05-15 20:57:53 +090067static unsigned int ata_dev_init_params(struct ata_device *dev,
68 u16 heads, u16 sectors);
69static unsigned int ata_dev_set_xfermode(struct ata_device *dev);
70static void ata_dev_xfermask(struct ata_device *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -070071
72static unsigned int ata_unique_id = 1;
73static struct workqueue_struct *ata_wq;
74
Tejun Heo453b07a2006-05-31 18:27:42 +090075struct workqueue_struct *ata_aux_wq;
76
Jeff Garzik418dc1f2006-03-11 20:50:08 -050077int atapi_enabled = 1;
Jeff Garzik1623c812005-08-30 03:37:42 -040078module_param(atapi_enabled, int, 0444);
79MODULE_PARM_DESC(atapi_enabled, "Enable discovery of ATAPI devices (0=off, 1=on)");
80
Albert Lee95de7192006-04-04 10:57:18 +080081int atapi_dmadir = 0;
82module_param(atapi_dmadir, int, 0444);
83MODULE_PARM_DESC(atapi_dmadir, "Enable ATAPI DMADIR bridge support (0=off, 1=on)");
84
Jeff Garzikc3c013a2006-02-27 22:31:19 -050085int libata_fua = 0;
86module_param_named(fua, libata_fua, int, 0444);
87MODULE_PARM_DESC(fua, "FUA support (0=off, 1=on)");
88
Andrew Mortona8601e52006-06-25 01:36:52 -070089static int ata_probe_timeout = ATA_TMOUT_INTERNAL / HZ;
90module_param(ata_probe_timeout, int, 0444);
91MODULE_PARM_DESC(ata_probe_timeout, "Set ATA probing timeout (seconds)");
92
Linus Torvalds1da177e2005-04-16 15:20:36 -070093MODULE_AUTHOR("Jeff Garzik");
94MODULE_DESCRIPTION("Library module for ATA devices");
95MODULE_LICENSE("GPL");
96MODULE_VERSION(DRV_VERSION);
97
Edward Falk0baab862005-06-02 18:17:13 -040098
99/**
Linus Torvalds1da177e2005-04-16 15:20:36 -0700100 * ata_tf_to_fis - Convert ATA taskfile to SATA FIS structure
101 * @tf: Taskfile to convert
102 * @fis: Buffer into which data will output
103 * @pmp: Port multiplier port
104 *
105 * Converts a standard ATA taskfile to a Serial ATA
106 * FIS structure (Register - Host to Device).
107 *
108 * LOCKING:
109 * Inherited from caller.
110 */
111
Jeff Garzik057ace52005-10-22 14:27:05 -0400112void ata_tf_to_fis(const struct ata_taskfile *tf, u8 *fis, u8 pmp)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700113{
114 fis[0] = 0x27; /* Register - Host to Device FIS */
115 fis[1] = (pmp & 0xf) | (1 << 7); /* Port multiplier number,
116 bit 7 indicates Command FIS */
117 fis[2] = tf->command;
118 fis[3] = tf->feature;
119
120 fis[4] = tf->lbal;
121 fis[5] = tf->lbam;
122 fis[6] = tf->lbah;
123 fis[7] = tf->device;
124
125 fis[8] = tf->hob_lbal;
126 fis[9] = tf->hob_lbam;
127 fis[10] = tf->hob_lbah;
128 fis[11] = tf->hob_feature;
129
130 fis[12] = tf->nsect;
131 fis[13] = tf->hob_nsect;
132 fis[14] = 0;
133 fis[15] = tf->ctl;
134
135 fis[16] = 0;
136 fis[17] = 0;
137 fis[18] = 0;
138 fis[19] = 0;
139}
140
141/**
142 * ata_tf_from_fis - Convert SATA FIS to ATA taskfile
143 * @fis: Buffer from which data will be input
144 * @tf: Taskfile to output
145 *
Mark Lorde12a1be2005-11-12 18:55:45 -0500146 * Converts a serial ATA FIS structure to a standard ATA taskfile.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700147 *
148 * LOCKING:
149 * Inherited from caller.
150 */
151
Jeff Garzik057ace52005-10-22 14:27:05 -0400152void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700153{
154 tf->command = fis[2]; /* status */
155 tf->feature = fis[3]; /* error */
156
157 tf->lbal = fis[4];
158 tf->lbam = fis[5];
159 tf->lbah = fis[6];
160 tf->device = fis[7];
161
162 tf->hob_lbal = fis[8];
163 tf->hob_lbam = fis[9];
164 tf->hob_lbah = fis[10];
165
166 tf->nsect = fis[12];
167 tf->hob_nsect = fis[13];
168}
169
Albert Lee8cbd6df2005-10-12 15:06:27 +0800170static const u8 ata_rw_cmds[] = {
171 /* pio multi */
172 ATA_CMD_READ_MULTI,
173 ATA_CMD_WRITE_MULTI,
174 ATA_CMD_READ_MULTI_EXT,
175 ATA_CMD_WRITE_MULTI_EXT,
Tejun Heo9a3dccc2006-01-06 09:56:18 +0100176 0,
177 0,
178 0,
179 ATA_CMD_WRITE_MULTI_FUA_EXT,
Albert Lee8cbd6df2005-10-12 15:06:27 +0800180 /* pio */
181 ATA_CMD_PIO_READ,
182 ATA_CMD_PIO_WRITE,
183 ATA_CMD_PIO_READ_EXT,
184 ATA_CMD_PIO_WRITE_EXT,
Tejun Heo9a3dccc2006-01-06 09:56:18 +0100185 0,
186 0,
187 0,
188 0,
Albert Lee8cbd6df2005-10-12 15:06:27 +0800189 /* dma */
190 ATA_CMD_READ,
191 ATA_CMD_WRITE,
192 ATA_CMD_READ_EXT,
Tejun Heo9a3dccc2006-01-06 09:56:18 +0100193 ATA_CMD_WRITE_EXT,
194 0,
195 0,
196 0,
197 ATA_CMD_WRITE_FUA_EXT
Albert Lee8cbd6df2005-10-12 15:06:27 +0800198};
Linus Torvalds1da177e2005-04-16 15:20:36 -0700199
200/**
Albert Lee8cbd6df2005-10-12 15:06:27 +0800201 * ata_rwcmd_protocol - set taskfile r/w commands and protocol
202 * @qc: command to examine and configure
Linus Torvalds1da177e2005-04-16 15:20:36 -0700203 *
Jeff Garzik2e9edbf2006-03-24 09:56:57 -0500204 * Examine the device configuration and tf->flags to calculate
Albert Lee8cbd6df2005-10-12 15:06:27 +0800205 * the proper read/write commands and protocol to use.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700206 *
207 * LOCKING:
208 * caller.
209 */
Tejun Heo9a3dccc2006-01-06 09:56:18 +0100210int ata_rwcmd_protocol(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700211{
Albert Lee8cbd6df2005-10-12 15:06:27 +0800212 struct ata_taskfile *tf = &qc->tf;
213 struct ata_device *dev = qc->dev;
Tejun Heo9a3dccc2006-01-06 09:56:18 +0100214 u8 cmd;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700215
Tejun Heo9a3dccc2006-01-06 09:56:18 +0100216 int index, fua, lba48, write;
Jeff Garzik2e9edbf2006-03-24 09:56:57 -0500217
Tejun Heo9a3dccc2006-01-06 09:56:18 +0100218 fua = (tf->flags & ATA_TFLAG_FUA) ? 4 : 0;
Albert Lee8cbd6df2005-10-12 15:06:27 +0800219 lba48 = (tf->flags & ATA_TFLAG_LBA48) ? 2 : 0;
220 write = (tf->flags & ATA_TFLAG_WRITE) ? 1 : 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700221
Albert Lee8cbd6df2005-10-12 15:06:27 +0800222 if (dev->flags & ATA_DFLAG_PIO) {
223 tf->protocol = ATA_PROT_PIO;
Tejun Heo9a3dccc2006-01-06 09:56:18 +0100224 index = dev->multi_count ? 0 : 8;
Alan Cox8d238e02006-01-17 20:50:31 +0000225 } else if (lba48 && (qc->ap->flags & ATA_FLAG_PIO_LBA48)) {
226 /* Unable to use DMA due to host limitation */
227 tf->protocol = ATA_PROT_PIO;
Albert Lee0565c262006-02-13 18:55:25 +0800228 index = dev->multi_count ? 0 : 8;
Albert Lee8cbd6df2005-10-12 15:06:27 +0800229 } else {
230 tf->protocol = ATA_PROT_DMA;
Tejun Heo9a3dccc2006-01-06 09:56:18 +0100231 index = 16;
Albert Lee8cbd6df2005-10-12 15:06:27 +0800232 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700233
Tejun Heo9a3dccc2006-01-06 09:56:18 +0100234 cmd = ata_rw_cmds[index + fua + lba48 + write];
235 if (cmd) {
236 tf->command = cmd;
237 return 0;
238 }
239 return -1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700240}
241
Tejun Heocb95d562006-03-06 04:31:56 +0900242/**
243 * ata_pack_xfermask - Pack pio, mwdma and udma masks into xfer_mask
244 * @pio_mask: pio_mask
245 * @mwdma_mask: mwdma_mask
246 * @udma_mask: udma_mask
247 *
248 * Pack @pio_mask, @mwdma_mask and @udma_mask into a single
249 * unsigned int xfer_mask.
250 *
251 * LOCKING:
252 * None.
253 *
254 * RETURNS:
255 * Packed xfer_mask.
256 */
257static unsigned int ata_pack_xfermask(unsigned int pio_mask,
258 unsigned int mwdma_mask,
259 unsigned int udma_mask)
260{
261 return ((pio_mask << ATA_SHIFT_PIO) & ATA_MASK_PIO) |
262 ((mwdma_mask << ATA_SHIFT_MWDMA) & ATA_MASK_MWDMA) |
263 ((udma_mask << ATA_SHIFT_UDMA) & ATA_MASK_UDMA);
264}
265
Tejun Heoc0489e42006-03-24 14:07:49 +0900266/**
267 * ata_unpack_xfermask - Unpack xfer_mask into pio, mwdma and udma masks
268 * @xfer_mask: xfer_mask to unpack
269 * @pio_mask: resulting pio_mask
270 * @mwdma_mask: resulting mwdma_mask
271 * @udma_mask: resulting udma_mask
272 *
273 * Unpack @xfer_mask into @pio_mask, @mwdma_mask and @udma_mask.
274 * Any NULL distination masks will be ignored.
275 */
276static void ata_unpack_xfermask(unsigned int xfer_mask,
277 unsigned int *pio_mask,
278 unsigned int *mwdma_mask,
279 unsigned int *udma_mask)
280{
281 if (pio_mask)
282 *pio_mask = (xfer_mask & ATA_MASK_PIO) >> ATA_SHIFT_PIO;
283 if (mwdma_mask)
284 *mwdma_mask = (xfer_mask & ATA_MASK_MWDMA) >> ATA_SHIFT_MWDMA;
285 if (udma_mask)
286 *udma_mask = (xfer_mask & ATA_MASK_UDMA) >> ATA_SHIFT_UDMA;
287}
288
Tejun Heocb95d562006-03-06 04:31:56 +0900289static const struct ata_xfer_ent {
Tejun Heobe9a50c82006-03-31 22:48:52 +0900290 int shift, bits;
Tejun Heocb95d562006-03-06 04:31:56 +0900291 u8 base;
292} ata_xfer_tbl[] = {
293 { ATA_SHIFT_PIO, ATA_BITS_PIO, XFER_PIO_0 },
294 { ATA_SHIFT_MWDMA, ATA_BITS_MWDMA, XFER_MW_DMA_0 },
295 { ATA_SHIFT_UDMA, ATA_BITS_UDMA, XFER_UDMA_0 },
296 { -1, },
297};
298
299/**
300 * ata_xfer_mask2mode - Find matching XFER_* for the given xfer_mask
301 * @xfer_mask: xfer_mask of interest
302 *
303 * Return matching XFER_* value for @xfer_mask. Only the highest
304 * bit of @xfer_mask is considered.
305 *
306 * LOCKING:
307 * None.
308 *
309 * RETURNS:
310 * Matching XFER_* value, 0 if no match found.
311 */
312static u8 ata_xfer_mask2mode(unsigned int xfer_mask)
313{
314 int highbit = fls(xfer_mask) - 1;
315 const struct ata_xfer_ent *ent;
316
317 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
318 if (highbit >= ent->shift && highbit < ent->shift + ent->bits)
319 return ent->base + highbit - ent->shift;
320 return 0;
321}
322
323/**
324 * ata_xfer_mode2mask - Find matching xfer_mask for XFER_*
325 * @xfer_mode: XFER_* of interest
326 *
327 * Return matching xfer_mask for @xfer_mode.
328 *
329 * LOCKING:
330 * None.
331 *
332 * RETURNS:
333 * Matching xfer_mask, 0 if no match found.
334 */
335static unsigned int ata_xfer_mode2mask(u8 xfer_mode)
336{
337 const struct ata_xfer_ent *ent;
338
339 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
340 if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits)
341 return 1 << (ent->shift + xfer_mode - ent->base);
342 return 0;
343}
344
345/**
346 * ata_xfer_mode2shift - Find matching xfer_shift for XFER_*
347 * @xfer_mode: XFER_* of interest
348 *
349 * Return matching xfer_shift for @xfer_mode.
350 *
351 * LOCKING:
352 * None.
353 *
354 * RETURNS:
355 * Matching xfer_shift, -1 if no match found.
356 */
357static int ata_xfer_mode2shift(unsigned int xfer_mode)
358{
359 const struct ata_xfer_ent *ent;
360
361 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
362 if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits)
363 return ent->shift;
364 return -1;
365}
366
Linus Torvalds1da177e2005-04-16 15:20:36 -0700367/**
Tejun Heo1da7b0d2006-03-06 04:31:56 +0900368 * ata_mode_string - convert xfer_mask to string
369 * @xfer_mask: mask of bits supported; only highest bit counts.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700370 *
371 * Determine string which represents the highest speed
Tejun Heo1da7b0d2006-03-06 04:31:56 +0900372 * (highest bit in @modemask).
Linus Torvalds1da177e2005-04-16 15:20:36 -0700373 *
374 * LOCKING:
375 * None.
376 *
377 * RETURNS:
378 * Constant C string representing highest speed listed in
Tejun Heo1da7b0d2006-03-06 04:31:56 +0900379 * @mode_mask, or the constant C string "<n/a>".
Linus Torvalds1da177e2005-04-16 15:20:36 -0700380 */
Tejun Heo1da7b0d2006-03-06 04:31:56 +0900381static const char *ata_mode_string(unsigned int xfer_mask)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700382{
Tejun Heo75f554b2006-03-06 04:31:57 +0900383 static const char * const xfer_mode_str[] = {
384 "PIO0",
385 "PIO1",
386 "PIO2",
387 "PIO3",
388 "PIO4",
Alan Coxb352e572006-08-10 18:52:12 +0100389 "PIO5",
390 "PIO6",
Tejun Heo75f554b2006-03-06 04:31:57 +0900391 "MWDMA0",
392 "MWDMA1",
393 "MWDMA2",
Alan Coxb352e572006-08-10 18:52:12 +0100394 "MWDMA3",
395 "MWDMA4",
Tejun Heo75f554b2006-03-06 04:31:57 +0900396 "UDMA/16",
397 "UDMA/25",
398 "UDMA/33",
399 "UDMA/44",
400 "UDMA/66",
401 "UDMA/100",
402 "UDMA/133",
403 "UDMA7",
404 };
Tejun Heo1da7b0d2006-03-06 04:31:56 +0900405 int highbit;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700406
Tejun Heo1da7b0d2006-03-06 04:31:56 +0900407 highbit = fls(xfer_mask) - 1;
408 if (highbit >= 0 && highbit < ARRAY_SIZE(xfer_mode_str))
409 return xfer_mode_str[highbit];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700410 return "<n/a>";
Linus Torvalds1da177e2005-04-16 15:20:36 -0700411}
412
Tejun Heo4c360c82006-04-01 01:38:17 +0900413static const char *sata_spd_string(unsigned int spd)
414{
415 static const char * const spd_str[] = {
416 "1.5 Gbps",
417 "3.0 Gbps",
418 };
419
420 if (spd == 0 || (spd - 1) >= ARRAY_SIZE(spd_str))
421 return "<unknown>";
422 return spd_str[spd - 1];
423}
424
Tejun Heo3373efd2006-05-15 20:57:53 +0900425void ata_dev_disable(struct ata_device *dev)
Tejun Heo0b8efb02006-03-24 15:25:31 +0900426{
Borislav Petkov0dd4b212006-06-23 02:29:08 -0400427 if (ata_dev_enabled(dev) && ata_msg_drv(dev->ap)) {
Tejun Heof15a1da2006-05-15 20:57:56 +0900428 ata_dev_printk(dev, KERN_WARNING, "disabled\n");
Tejun Heo0b8efb02006-03-24 15:25:31 +0900429 dev->class++;
430 }
431}
432
Linus Torvalds1da177e2005-04-16 15:20:36 -0700433/**
434 * ata_pio_devchk - PATA device presence detection
435 * @ap: ATA channel to examine
436 * @device: Device to examine (starting at zero)
437 *
438 * This technique was originally described in
439 * Hale Landis's ATADRVR (www.ata-atapi.com), and
440 * later found its way into the ATA/ATAPI spec.
441 *
442 * Write a pattern to the ATA shadow registers,
443 * and if a device is present, it will respond by
444 * correctly storing and echoing back the
445 * ATA shadow register contents.
446 *
447 * LOCKING:
448 * caller.
449 */
450
451static unsigned int ata_pio_devchk(struct ata_port *ap,
452 unsigned int device)
453{
454 struct ata_ioports *ioaddr = &ap->ioaddr;
455 u8 nsect, lbal;
456
457 ap->ops->dev_select(ap, device);
458
459 outb(0x55, ioaddr->nsect_addr);
460 outb(0xaa, ioaddr->lbal_addr);
461
462 outb(0xaa, ioaddr->nsect_addr);
463 outb(0x55, ioaddr->lbal_addr);
464
465 outb(0x55, ioaddr->nsect_addr);
466 outb(0xaa, ioaddr->lbal_addr);
467
468 nsect = inb(ioaddr->nsect_addr);
469 lbal = inb(ioaddr->lbal_addr);
470
471 if ((nsect == 0x55) && (lbal == 0xaa))
472 return 1; /* we found a device */
473
474 return 0; /* nothing found */
475}
476
477/**
478 * ata_mmio_devchk - PATA device presence detection
479 * @ap: ATA channel to examine
480 * @device: Device to examine (starting at zero)
481 *
482 * This technique was originally described in
483 * Hale Landis's ATADRVR (www.ata-atapi.com), and
484 * later found its way into the ATA/ATAPI spec.
485 *
486 * Write a pattern to the ATA shadow registers,
487 * and if a device is present, it will respond by
488 * correctly storing and echoing back the
489 * ATA shadow register contents.
490 *
491 * LOCKING:
492 * caller.
493 */
494
495static unsigned int ata_mmio_devchk(struct ata_port *ap,
496 unsigned int device)
497{
498 struct ata_ioports *ioaddr = &ap->ioaddr;
499 u8 nsect, lbal;
500
501 ap->ops->dev_select(ap, device);
502
503 writeb(0x55, (void __iomem *) ioaddr->nsect_addr);
504 writeb(0xaa, (void __iomem *) ioaddr->lbal_addr);
505
506 writeb(0xaa, (void __iomem *) ioaddr->nsect_addr);
507 writeb(0x55, (void __iomem *) ioaddr->lbal_addr);
508
509 writeb(0x55, (void __iomem *) ioaddr->nsect_addr);
510 writeb(0xaa, (void __iomem *) ioaddr->lbal_addr);
511
512 nsect = readb((void __iomem *) ioaddr->nsect_addr);
513 lbal = readb((void __iomem *) ioaddr->lbal_addr);
514
515 if ((nsect == 0x55) && (lbal == 0xaa))
516 return 1; /* we found a device */
517
518 return 0; /* nothing found */
519}
520
521/**
522 * ata_devchk - PATA device presence detection
523 * @ap: ATA channel to examine
524 * @device: Device to examine (starting at zero)
525 *
526 * Dispatch ATA device presence detection, depending
527 * on whether we are using PIO or MMIO to talk to the
528 * ATA shadow registers.
529 *
530 * LOCKING:
531 * caller.
532 */
533
534static unsigned int ata_devchk(struct ata_port *ap,
535 unsigned int device)
536{
537 if (ap->flags & ATA_FLAG_MMIO)
538 return ata_mmio_devchk(ap, device);
539 return ata_pio_devchk(ap, device);
540}
541
542/**
543 * ata_dev_classify - determine device type based on ATA-spec signature
544 * @tf: ATA taskfile register set for device to be identified
545 *
546 * Determine from taskfile register contents whether a device is
547 * ATA or ATAPI, as per "Signature and persistence" section
548 * of ATA/PI spec (volume 1, sect 5.14).
549 *
550 * LOCKING:
551 * None.
552 *
553 * RETURNS:
554 * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, or %ATA_DEV_UNKNOWN
555 * the event of failure.
556 */
557
Jeff Garzik057ace52005-10-22 14:27:05 -0400558unsigned int ata_dev_classify(const struct ata_taskfile *tf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700559{
560 /* Apple's open source Darwin code hints that some devices only
561 * put a proper signature into the LBA mid/high registers,
562 * So, we only check those. It's sufficient for uniqueness.
563 */
564
565 if (((tf->lbam == 0) && (tf->lbah == 0)) ||
566 ((tf->lbam == 0x3c) && (tf->lbah == 0xc3))) {
567 DPRINTK("found ATA device by sig\n");
568 return ATA_DEV_ATA;
569 }
570
571 if (((tf->lbam == 0x14) && (tf->lbah == 0xeb)) ||
572 ((tf->lbam == 0x69) && (tf->lbah == 0x96))) {
573 DPRINTK("found ATAPI device by sig\n");
574 return ATA_DEV_ATAPI;
575 }
576
577 DPRINTK("unknown device\n");
578 return ATA_DEV_UNKNOWN;
579}
580
581/**
582 * ata_dev_try_classify - Parse returned ATA device signature
583 * @ap: ATA channel to examine
584 * @device: Device to examine (starting at zero)
Tejun Heob4dc7622006-01-24 17:05:22 +0900585 * @r_err: Value of error register on completion
Linus Torvalds1da177e2005-04-16 15:20:36 -0700586 *
587 * After an event -- SRST, E.D.D., or SATA COMRESET -- occurs,
588 * an ATA/ATAPI-defined set of values is placed in the ATA
589 * shadow registers, indicating the results of device detection
590 * and diagnostics.
591 *
592 * Select the ATA device, and read the values from the ATA shadow
593 * registers. Then parse according to the Error register value,
594 * and the spec-defined values examined by ata_dev_classify().
595 *
596 * LOCKING:
597 * caller.
Tejun Heob4dc7622006-01-24 17:05:22 +0900598 *
599 * RETURNS:
600 * Device type - %ATA_DEV_ATA, %ATA_DEV_ATAPI or %ATA_DEV_NONE.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700601 */
602
Tejun Heob4dc7622006-01-24 17:05:22 +0900603static unsigned int
604ata_dev_try_classify(struct ata_port *ap, unsigned int device, u8 *r_err)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700605{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700606 struct ata_taskfile tf;
607 unsigned int class;
608 u8 err;
609
610 ap->ops->dev_select(ap, device);
611
612 memset(&tf, 0, sizeof(tf));
613
Linus Torvalds1da177e2005-04-16 15:20:36 -0700614 ap->ops->tf_read(ap, &tf);
Jeff Garzik0169e282005-10-29 21:25:10 -0400615 err = tf.feature;
Tejun Heob4dc7622006-01-24 17:05:22 +0900616 if (r_err)
617 *r_err = err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700618
Alan Cox93590852006-09-12 16:55:12 +0100619 /* see if device passed diags: if master then continue and warn later */
620 if (err == 0 && device == 0)
621 /* diagnostic fail : do nothing _YET_ */
622 ap->device[device].horkage |= ATA_HORKAGE_DIAGNOSTIC;
623 else if (err == 1)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700624 /* do nothing */ ;
625 else if ((device == 0) && (err == 0x81))
626 /* do nothing */ ;
627 else
Tejun Heob4dc7622006-01-24 17:05:22 +0900628 return ATA_DEV_NONE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700629
Tejun Heob4dc7622006-01-24 17:05:22 +0900630 /* determine if device is ATA or ATAPI */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700631 class = ata_dev_classify(&tf);
Tejun Heob4dc7622006-01-24 17:05:22 +0900632
Linus Torvalds1da177e2005-04-16 15:20:36 -0700633 if (class == ATA_DEV_UNKNOWN)
Tejun Heob4dc7622006-01-24 17:05:22 +0900634 return ATA_DEV_NONE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700635 if ((class == ATA_DEV_ATA) && (ata_chk_status(ap) == 0))
Tejun Heob4dc7622006-01-24 17:05:22 +0900636 return ATA_DEV_NONE;
637 return class;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700638}
639
640/**
Tejun Heo6a62a042006-02-13 10:02:46 +0900641 * ata_id_string - Convert IDENTIFY DEVICE page into string
Linus Torvalds1da177e2005-04-16 15:20:36 -0700642 * @id: IDENTIFY DEVICE results we will examine
643 * @s: string into which data is output
644 * @ofs: offset into identify device page
645 * @len: length of string to return. must be an even number.
646 *
647 * The strings in the IDENTIFY DEVICE page are broken up into
648 * 16-bit chunks. Run through the string, and output each
649 * 8-bit chunk linearly, regardless of platform.
650 *
651 * LOCKING:
652 * caller.
653 */
654
Tejun Heo6a62a042006-02-13 10:02:46 +0900655void ata_id_string(const u16 *id, unsigned char *s,
656 unsigned int ofs, unsigned int len)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700657{
658 unsigned int c;
659
660 while (len > 0) {
661 c = id[ofs] >> 8;
662 *s = c;
663 s++;
664
665 c = id[ofs] & 0xff;
666 *s = c;
667 s++;
668
669 ofs++;
670 len -= 2;
671 }
672}
673
Tejun Heo0e949ff2006-02-12 22:47:04 +0900674/**
Tejun Heo6a62a042006-02-13 10:02:46 +0900675 * ata_id_c_string - Convert IDENTIFY DEVICE page into C string
Tejun Heo0e949ff2006-02-12 22:47:04 +0900676 * @id: IDENTIFY DEVICE results we will examine
677 * @s: string into which data is output
678 * @ofs: offset into identify device page
679 * @len: length of string to return. must be an odd number.
680 *
Tejun Heo6a62a042006-02-13 10:02:46 +0900681 * This function is identical to ata_id_string except that it
Tejun Heo0e949ff2006-02-12 22:47:04 +0900682 * trims trailing spaces and terminates the resulting string with
683 * null. @len must be actual maximum length (even number) + 1.
684 *
685 * LOCKING:
686 * caller.
687 */
Tejun Heo6a62a042006-02-13 10:02:46 +0900688void ata_id_c_string(const u16 *id, unsigned char *s,
689 unsigned int ofs, unsigned int len)
Tejun Heo0e949ff2006-02-12 22:47:04 +0900690{
691 unsigned char *p;
692
693 WARN_ON(!(len & 1));
694
Tejun Heo6a62a042006-02-13 10:02:46 +0900695 ata_id_string(id, s, ofs, len - 1);
Tejun Heo0e949ff2006-02-12 22:47:04 +0900696
697 p = s + strnlen(s, len - 1);
698 while (p > s && p[-1] == ' ')
699 p--;
700 *p = '\0';
701}
Edward Falk0baab862005-06-02 18:17:13 -0400702
Tejun Heo29407402006-02-12 22:47:04 +0900703static u64 ata_id_n_sectors(const u16 *id)
704{
705 if (ata_id_has_lba(id)) {
706 if (ata_id_has_lba48(id))
707 return ata_id_u64(id, 100);
708 else
709 return ata_id_u32(id, 60);
710 } else {
711 if (ata_id_current_chs_valid(id))
712 return ata_id_u32(id, 57);
713 else
714 return id[1] * id[3] * id[6];
715 }
716}
717
Edward Falk0baab862005-06-02 18:17:13 -0400718/**
719 * ata_noop_dev_select - Select device 0/1 on ATA bus
720 * @ap: ATA channel to manipulate
721 * @device: ATA device (numbered from zero) to select
722 *
723 * This function performs no actual function.
724 *
725 * May be used as the dev_select() entry in ata_port_operations.
726 *
727 * LOCKING:
728 * caller.
729 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700730void ata_noop_dev_select (struct ata_port *ap, unsigned int device)
731{
732}
733
Edward Falk0baab862005-06-02 18:17:13 -0400734
Linus Torvalds1da177e2005-04-16 15:20:36 -0700735/**
736 * ata_std_dev_select - Select device 0/1 on ATA bus
737 * @ap: ATA channel to manipulate
738 * @device: ATA device (numbered from zero) to select
739 *
740 * Use the method defined in the ATA specification to
741 * make either device 0, or device 1, active on the
Edward Falk0baab862005-06-02 18:17:13 -0400742 * ATA channel. Works with both PIO and MMIO.
743 *
744 * May be used as the dev_select() entry in ata_port_operations.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700745 *
746 * LOCKING:
747 * caller.
748 */
749
750void ata_std_dev_select (struct ata_port *ap, unsigned int device)
751{
752 u8 tmp;
753
754 if (device == 0)
755 tmp = ATA_DEVICE_OBS;
756 else
757 tmp = ATA_DEVICE_OBS | ATA_DEV1;
758
759 if (ap->flags & ATA_FLAG_MMIO) {
760 writeb(tmp, (void __iomem *) ap->ioaddr.device_addr);
761 } else {
762 outb(tmp, ap->ioaddr.device_addr);
763 }
764 ata_pause(ap); /* needed; also flushes, for mmio */
765}
766
767/**
768 * ata_dev_select - Select device 0/1 on ATA bus
769 * @ap: ATA channel to manipulate
770 * @device: ATA device (numbered from zero) to select
771 * @wait: non-zero to wait for Status register BSY bit to clear
772 * @can_sleep: non-zero if context allows sleeping
773 *
774 * Use the method defined in the ATA specification to
775 * make either device 0, or device 1, active on the
776 * ATA channel.
777 *
778 * This is a high-level version of ata_std_dev_select(),
779 * which additionally provides the services of inserting
780 * the proper pauses and status polling, where needed.
781 *
782 * LOCKING:
783 * caller.
784 */
785
786void ata_dev_select(struct ata_port *ap, unsigned int device,
787 unsigned int wait, unsigned int can_sleep)
788{
Tejun Heo88574552006-06-25 20:00:35 +0900789 if (ata_msg_probe(ap))
Borislav Petkov0dd4b212006-06-23 02:29:08 -0400790 ata_port_printk(ap, KERN_INFO, "ata_dev_select: ENTER, ata%u: "
Tejun Heo88574552006-06-25 20:00:35 +0900791 "device %u, wait %u\n", ap->id, device, wait);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700792
793 if (wait)
794 ata_wait_idle(ap);
795
796 ap->ops->dev_select(ap, device);
797
798 if (wait) {
799 if (can_sleep && ap->device[device].class == ATA_DEV_ATAPI)
800 msleep(150);
801 ata_wait_idle(ap);
802 }
803}
804
805/**
806 * ata_dump_id - IDENTIFY DEVICE info debugging output
Tejun Heo0bd33002006-02-12 22:47:05 +0900807 * @id: IDENTIFY DEVICE page to dump
Linus Torvalds1da177e2005-04-16 15:20:36 -0700808 *
Tejun Heo0bd33002006-02-12 22:47:05 +0900809 * Dump selected 16-bit words from the given IDENTIFY DEVICE
810 * page.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700811 *
812 * LOCKING:
813 * caller.
814 */
815
Tejun Heo0bd33002006-02-12 22:47:05 +0900816static inline void ata_dump_id(const u16 *id)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700817{
818 DPRINTK("49==0x%04x "
819 "53==0x%04x "
820 "63==0x%04x "
821 "64==0x%04x "
822 "75==0x%04x \n",
Tejun Heo0bd33002006-02-12 22:47:05 +0900823 id[49],
824 id[53],
825 id[63],
826 id[64],
827 id[75]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700828 DPRINTK("80==0x%04x "
829 "81==0x%04x "
830 "82==0x%04x "
831 "83==0x%04x "
832 "84==0x%04x \n",
Tejun Heo0bd33002006-02-12 22:47:05 +0900833 id[80],
834 id[81],
835 id[82],
836 id[83],
837 id[84]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700838 DPRINTK("88==0x%04x "
839 "93==0x%04x\n",
Tejun Heo0bd33002006-02-12 22:47:05 +0900840 id[88],
841 id[93]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700842}
843
Tejun Heocb95d562006-03-06 04:31:56 +0900844/**
845 * ata_id_xfermask - Compute xfermask from the given IDENTIFY data
846 * @id: IDENTIFY data to compute xfer mask from
847 *
848 * Compute the xfermask for this device. This is not as trivial
849 * as it seems if we must consider early devices correctly.
850 *
851 * FIXME: pre IDE drive timing (do we care ?).
852 *
853 * LOCKING:
854 * None.
855 *
856 * RETURNS:
857 * Computed xfermask
858 */
859static unsigned int ata_id_xfermask(const u16 *id)
860{
861 unsigned int pio_mask, mwdma_mask, udma_mask;
862
863 /* Usual case. Word 53 indicates word 64 is valid */
864 if (id[ATA_ID_FIELD_VALID] & (1 << 1)) {
865 pio_mask = id[ATA_ID_PIO_MODES] & 0x03;
866 pio_mask <<= 3;
867 pio_mask |= 0x7;
868 } else {
869 /* If word 64 isn't valid then Word 51 high byte holds
870 * the PIO timing number for the maximum. Turn it into
871 * a mask.
872 */
873 pio_mask = (2 << (id[ATA_ID_OLD_PIO_MODES] & 0xFF)) - 1 ;
874
875 /* But wait.. there's more. Design your standards by
876 * committee and you too can get a free iordy field to
877 * process. However its the speeds not the modes that
878 * are supported... Note drivers using the timing API
879 * will get this right anyway
880 */
881 }
882
883 mwdma_mask = id[ATA_ID_MWDMA_MODES] & 0x07;
Tejun Heofb21f0d2006-03-12 12:34:35 +0900884
Alan Coxb352e572006-08-10 18:52:12 +0100885 if (ata_id_is_cfa(id)) {
886 /*
887 * Process compact flash extended modes
888 */
889 int pio = id[163] & 0x7;
890 int dma = (id[163] >> 3) & 7;
891
892 if (pio)
893 pio_mask |= (1 << 5);
894 if (pio > 1)
895 pio_mask |= (1 << 6);
896 if (dma)
897 mwdma_mask |= (1 << 3);
898 if (dma > 1)
899 mwdma_mask |= (1 << 4);
900 }
901
Tejun Heofb21f0d2006-03-12 12:34:35 +0900902 udma_mask = 0;
903 if (id[ATA_ID_FIELD_VALID] & (1 << 2))
904 udma_mask = id[ATA_ID_UDMA_MODES] & 0xff;
Tejun Heocb95d562006-03-06 04:31:56 +0900905
906 return ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask);
907}
908
Tejun Heo86e45b62006-03-05 15:29:09 +0900909/**
910 * ata_port_queue_task - Queue port_task
911 * @ap: The ata_port to queue port_task for
Randy Dunlape2a7f772006-05-18 10:50:18 -0700912 * @fn: workqueue function to be scheduled
913 * @data: data value to pass to workqueue function
914 * @delay: delay time for workqueue function
Tejun Heo86e45b62006-03-05 15:29:09 +0900915 *
916 * Schedule @fn(@data) for execution after @delay jiffies using
917 * port_task. There is one port_task per port and it's the
918 * user(low level driver)'s responsibility to make sure that only
919 * one task is active at any given time.
920 *
921 * libata core layer takes care of synchronization between
922 * port_task and EH. ata_port_queue_task() may be ignored for EH
923 * synchronization.
924 *
925 * LOCKING:
926 * Inherited from caller.
927 */
928void ata_port_queue_task(struct ata_port *ap, void (*fn)(void *), void *data,
929 unsigned long delay)
930{
931 int rc;
932
Tejun Heob51e9e52006-06-29 01:29:30 +0900933 if (ap->pflags & ATA_PFLAG_FLUSH_PORT_TASK)
Tejun Heo86e45b62006-03-05 15:29:09 +0900934 return;
935
936 PREPARE_WORK(&ap->port_task, fn, data);
937
938 if (!delay)
939 rc = queue_work(ata_wq, &ap->port_task);
940 else
941 rc = queue_delayed_work(ata_wq, &ap->port_task, delay);
942
943 /* rc == 0 means that another user is using port task */
944 WARN_ON(rc == 0);
945}
946
947/**
948 * ata_port_flush_task - Flush port_task
949 * @ap: The ata_port to flush port_task for
950 *
951 * After this function completes, port_task is guranteed not to
952 * be running or scheduled.
953 *
954 * LOCKING:
955 * Kernel thread context (may sleep)
956 */
957void ata_port_flush_task(struct ata_port *ap)
958{
959 unsigned long flags;
960
961 DPRINTK("ENTER\n");
962
Jeff Garzikba6a1302006-06-22 23:46:10 -0400963 spin_lock_irqsave(ap->lock, flags);
Tejun Heob51e9e52006-06-29 01:29:30 +0900964 ap->pflags |= ATA_PFLAG_FLUSH_PORT_TASK;
Jeff Garzikba6a1302006-06-22 23:46:10 -0400965 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heo86e45b62006-03-05 15:29:09 +0900966
967 DPRINTK("flush #1\n");
968 flush_workqueue(ata_wq);
969
970 /*
971 * At this point, if a task is running, it's guaranteed to see
972 * the FLUSH flag; thus, it will never queue pio tasks again.
973 * Cancel and flush.
974 */
975 if (!cancel_delayed_work(&ap->port_task)) {
Borislav Petkov0dd4b212006-06-23 02:29:08 -0400976 if (ata_msg_ctl(ap))
Tejun Heo88574552006-06-25 20:00:35 +0900977 ata_port_printk(ap, KERN_DEBUG, "%s: flush #2\n",
978 __FUNCTION__);
Tejun Heo86e45b62006-03-05 15:29:09 +0900979 flush_workqueue(ata_wq);
980 }
981
Jeff Garzikba6a1302006-06-22 23:46:10 -0400982 spin_lock_irqsave(ap->lock, flags);
Tejun Heob51e9e52006-06-29 01:29:30 +0900983 ap->pflags &= ~ATA_PFLAG_FLUSH_PORT_TASK;
Jeff Garzikba6a1302006-06-22 23:46:10 -0400984 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heo86e45b62006-03-05 15:29:09 +0900985
Borislav Petkov0dd4b212006-06-23 02:29:08 -0400986 if (ata_msg_ctl(ap))
987 ata_port_printk(ap, KERN_DEBUG, "%s: EXIT\n", __FUNCTION__);
Tejun Heo86e45b62006-03-05 15:29:09 +0900988}
989
Tejun Heo77853bf2006-01-23 13:09:36 +0900990void ata_qc_complete_internal(struct ata_queued_cmd *qc)
Tejun Heoa2a7a662005-12-13 14:48:31 +0900991{
Tejun Heo77853bf2006-01-23 13:09:36 +0900992 struct completion *waiting = qc->private_data;
Tejun Heoa2a7a662005-12-13 14:48:31 +0900993
Tejun Heoa2a7a662005-12-13 14:48:31 +0900994 complete(waiting);
Tejun Heoa2a7a662005-12-13 14:48:31 +0900995}
996
997/**
998 * ata_exec_internal - execute libata internal command
Tejun Heoa2a7a662005-12-13 14:48:31 +0900999 * @dev: Device to which the command is sent
1000 * @tf: Taskfile registers for the command and the result
Tejun Heod69cf372006-04-02 18:51:53 +09001001 * @cdb: CDB for packet command
Tejun Heoa2a7a662005-12-13 14:48:31 +09001002 * @dma_dir: Data tranfer direction of the command
1003 * @buf: Data buffer of the command
1004 * @buflen: Length of data buffer
1005 *
1006 * Executes libata internal command with timeout. @tf contains
1007 * command on entry and result on return. Timeout and error
1008 * conditions are reported via return value. No recovery action
1009 * is taken after a command times out. It's caller's duty to
1010 * clean up after timeout.
1011 *
1012 * LOCKING:
1013 * None. Should be called with kernel context, might sleep.
Tejun Heo551e8882006-06-12 14:09:49 +09001014 *
1015 * RETURNS:
1016 * Zero on success, AC_ERR_* mask on failure
Tejun Heoa2a7a662005-12-13 14:48:31 +09001017 */
Tejun Heo3373efd2006-05-15 20:57:53 +09001018unsigned ata_exec_internal(struct ata_device *dev,
Tejun Heo1ad8e7f2006-04-02 18:51:53 +09001019 struct ata_taskfile *tf, const u8 *cdb,
1020 int dma_dir, void *buf, unsigned int buflen)
Tejun Heoa2a7a662005-12-13 14:48:31 +09001021{
Tejun Heo3373efd2006-05-15 20:57:53 +09001022 struct ata_port *ap = dev->ap;
Tejun Heoa2a7a662005-12-13 14:48:31 +09001023 u8 command = tf->command;
1024 struct ata_queued_cmd *qc;
Tejun Heo2ab7db12006-05-15 20:58:02 +09001025 unsigned int tag, preempted_tag;
Tejun Heodedaf2b2006-05-15 21:03:43 +09001026 u32 preempted_sactive, preempted_qc_active;
Ingo Molnar60be6b92006-07-03 00:25:26 -07001027 DECLARE_COMPLETION_ONSTACK(wait);
Tejun Heoa2a7a662005-12-13 14:48:31 +09001028 unsigned long flags;
Tejun Heo77853bf2006-01-23 13:09:36 +09001029 unsigned int err_mask;
Tejun Heod95a7172006-05-15 20:58:14 +09001030 int rc;
Tejun Heoa2a7a662005-12-13 14:48:31 +09001031
Jeff Garzikba6a1302006-06-22 23:46:10 -04001032 spin_lock_irqsave(ap->lock, flags);
Tejun Heoa2a7a662005-12-13 14:48:31 +09001033
Tejun Heoe3180492006-05-15 20:58:09 +09001034 /* no internal command while frozen */
Tejun Heob51e9e52006-06-29 01:29:30 +09001035 if (ap->pflags & ATA_PFLAG_FROZEN) {
Jeff Garzikba6a1302006-06-22 23:46:10 -04001036 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heoe3180492006-05-15 20:58:09 +09001037 return AC_ERR_SYSTEM;
1038 }
1039
Tejun Heo2ab7db12006-05-15 20:58:02 +09001040 /* initialize internal qc */
Tejun Heoa2a7a662005-12-13 14:48:31 +09001041
Tejun Heo2ab7db12006-05-15 20:58:02 +09001042 /* XXX: Tag 0 is used for drivers with legacy EH as some
1043 * drivers choke if any other tag is given. This breaks
1044 * ata_tag_internal() test for those drivers. Don't use new
1045 * EH stuff without converting to it.
1046 */
1047 if (ap->ops->error_handler)
1048 tag = ATA_TAG_INTERNAL;
1049 else
1050 tag = 0;
1051
Tejun Heo6cec4a32006-05-15 21:03:41 +09001052 if (test_and_set_bit(tag, &ap->qc_allocated))
Tejun Heo2ab7db12006-05-15 20:58:02 +09001053 BUG();
Tejun Heof69499f2006-05-15 20:58:03 +09001054 qc = __ata_qc_from_tag(ap, tag);
Tejun Heo2ab7db12006-05-15 20:58:02 +09001055
1056 qc->tag = tag;
1057 qc->scsicmd = NULL;
1058 qc->ap = ap;
1059 qc->dev = dev;
1060 ata_qc_reinit(qc);
1061
1062 preempted_tag = ap->active_tag;
Tejun Heodedaf2b2006-05-15 21:03:43 +09001063 preempted_sactive = ap->sactive;
1064 preempted_qc_active = ap->qc_active;
Tejun Heo2ab7db12006-05-15 20:58:02 +09001065 ap->active_tag = ATA_TAG_POISON;
Tejun Heodedaf2b2006-05-15 21:03:43 +09001066 ap->sactive = 0;
1067 ap->qc_active = 0;
Tejun Heo2ab7db12006-05-15 20:58:02 +09001068
1069 /* prepare & issue qc */
Tejun Heoa2a7a662005-12-13 14:48:31 +09001070 qc->tf = *tf;
Tejun Heod69cf372006-04-02 18:51:53 +09001071 if (cdb)
1072 memcpy(qc->cdb, cdb, ATAPI_CDB_LEN);
Tejun Heoe61e0672006-05-15 20:57:40 +09001073 qc->flags |= ATA_QCFLAG_RESULT_TF;
Tejun Heoa2a7a662005-12-13 14:48:31 +09001074 qc->dma_dir = dma_dir;
1075 if (dma_dir != DMA_NONE) {
1076 ata_sg_init_one(qc, buf, buflen);
1077 qc->nsect = buflen / ATA_SECT_SIZE;
1078 }
1079
Tejun Heo77853bf2006-01-23 13:09:36 +09001080 qc->private_data = &wait;
Tejun Heoa2a7a662005-12-13 14:48:31 +09001081 qc->complete_fn = ata_qc_complete_internal;
1082
Tejun Heo8e0e6942006-03-31 20:41:11 +09001083 ata_qc_issue(qc);
Tejun Heoa2a7a662005-12-13 14:48:31 +09001084
Jeff Garzikba6a1302006-06-22 23:46:10 -04001085 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heoa2a7a662005-12-13 14:48:31 +09001086
Andrew Mortona8601e52006-06-25 01:36:52 -07001087 rc = wait_for_completion_timeout(&wait, ata_probe_timeout);
Albert Lee41ade502006-03-14 11:19:04 +08001088
Tejun Heod95a7172006-05-15 20:58:14 +09001089 ata_port_flush_task(ap);
1090
1091 if (!rc) {
Jeff Garzikba6a1302006-06-22 23:46:10 -04001092 spin_lock_irqsave(ap->lock, flags);
Tejun Heoa2a7a662005-12-13 14:48:31 +09001093
1094 /* We're racing with irq here. If we lose, the
1095 * following test prevents us from completing the qc
Tejun Heod95a7172006-05-15 20:58:14 +09001096 * twice. If we win, the port is frozen and will be
1097 * cleaned up by ->post_internal_cmd().
Tejun Heoa2a7a662005-12-13 14:48:31 +09001098 */
Tejun Heo77853bf2006-01-23 13:09:36 +09001099 if (qc->flags & ATA_QCFLAG_ACTIVE) {
Tejun Heod95a7172006-05-15 20:58:14 +09001100 qc->err_mask |= AC_ERR_TIMEOUT;
1101
1102 if (ap->ops->error_handler)
1103 ata_port_freeze(ap);
1104 else
1105 ata_qc_complete(qc);
Tejun Heof15a1da2006-05-15 20:57:56 +09001106
Borislav Petkov0dd4b212006-06-23 02:29:08 -04001107 if (ata_msg_warn(ap))
1108 ata_dev_printk(dev, KERN_WARNING,
Tejun Heo88574552006-06-25 20:00:35 +09001109 "qc timeout (cmd 0x%x)\n", command);
Tejun Heoa2a7a662005-12-13 14:48:31 +09001110 }
1111
Jeff Garzikba6a1302006-06-22 23:46:10 -04001112 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heoa2a7a662005-12-13 14:48:31 +09001113 }
1114
Tejun Heod95a7172006-05-15 20:58:14 +09001115 /* do post_internal_cmd */
1116 if (ap->ops->post_internal_cmd)
1117 ap->ops->post_internal_cmd(qc);
1118
1119 if (qc->flags & ATA_QCFLAG_FAILED && !qc->err_mask) {
Borislav Petkov0dd4b212006-06-23 02:29:08 -04001120 if (ata_msg_warn(ap))
Tejun Heo88574552006-06-25 20:00:35 +09001121 ata_dev_printk(dev, KERN_WARNING,
Borislav Petkov0dd4b212006-06-23 02:29:08 -04001122 "zero err_mask for failed "
Tejun Heo88574552006-06-25 20:00:35 +09001123 "internal command, assuming AC_ERR_OTHER\n");
Tejun Heod95a7172006-05-15 20:58:14 +09001124 qc->err_mask |= AC_ERR_OTHER;
1125 }
1126
Tejun Heo15869302006-05-15 20:57:33 +09001127 /* finish up */
Jeff Garzikba6a1302006-06-22 23:46:10 -04001128 spin_lock_irqsave(ap->lock, flags);
Tejun Heo15869302006-05-15 20:57:33 +09001129
Tejun Heoe61e0672006-05-15 20:57:40 +09001130 *tf = qc->result_tf;
Tejun Heo77853bf2006-01-23 13:09:36 +09001131 err_mask = qc->err_mask;
1132
1133 ata_qc_free(qc);
Tejun Heo2ab7db12006-05-15 20:58:02 +09001134 ap->active_tag = preempted_tag;
Tejun Heodedaf2b2006-05-15 21:03:43 +09001135 ap->sactive = preempted_sactive;
1136 ap->qc_active = preempted_qc_active;
Tejun Heo77853bf2006-01-23 13:09:36 +09001137
Tejun Heo1f7dd3e2006-03-24 15:25:30 +09001138 /* XXX - Some LLDDs (sata_mv) disable port on command failure.
1139 * Until those drivers are fixed, we detect the condition
1140 * here, fail the command with AC_ERR_SYSTEM and reenable the
1141 * port.
1142 *
1143 * Note that this doesn't change any behavior as internal
1144 * command failure results in disabling the device in the
1145 * higher layer for LLDDs without new reset/EH callbacks.
1146 *
1147 * Kill the following code as soon as those drivers are fixed.
1148 */
Tejun Heo198e0fe2006-04-02 18:51:52 +09001149 if (ap->flags & ATA_FLAG_DISABLED) {
Tejun Heo1f7dd3e2006-03-24 15:25:30 +09001150 err_mask |= AC_ERR_SYSTEM;
1151 ata_port_probe(ap);
1152 }
1153
Jeff Garzikba6a1302006-06-22 23:46:10 -04001154 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heo15869302006-05-15 20:57:33 +09001155
Tejun Heo77853bf2006-01-23 13:09:36 +09001156 return err_mask;
Tejun Heoa2a7a662005-12-13 14:48:31 +09001157}
1158
Linus Torvalds1da177e2005-04-16 15:20:36 -07001159/**
Tejun Heo977e6b92006-06-24 20:30:19 +09001160 * ata_do_simple_cmd - execute simple internal command
1161 * @dev: Device to which the command is sent
1162 * @cmd: Opcode to execute
1163 *
1164 * Execute a 'simple' command, that only consists of the opcode
1165 * 'cmd' itself, without filling any other registers
1166 *
1167 * LOCKING:
1168 * Kernel thread context (may sleep).
1169 *
1170 * RETURNS:
1171 * Zero on success, AC_ERR_* mask on failure
Tejun Heoe58eb582006-06-24 20:30:19 +09001172 */
Tejun Heo77b08fb2006-06-24 20:30:19 +09001173unsigned int ata_do_simple_cmd(struct ata_device *dev, u8 cmd)
Tejun Heoe58eb582006-06-24 20:30:19 +09001174{
1175 struct ata_taskfile tf;
Tejun Heoe58eb582006-06-24 20:30:19 +09001176
1177 ata_tf_init(dev, &tf);
1178
1179 tf.command = cmd;
1180 tf.flags |= ATA_TFLAG_DEVICE;
1181 tf.protocol = ATA_PROT_NODATA;
1182
Tejun Heo977e6b92006-06-24 20:30:19 +09001183 return ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0);
Tejun Heoe58eb582006-06-24 20:30:19 +09001184}
1185
Linus Torvalds1da177e2005-04-16 15:20:36 -07001186/**
Alan Cox1bc4ccf2006-01-09 17:18:14 +00001187 * ata_pio_need_iordy - check if iordy needed
1188 * @adev: ATA device
1189 *
1190 * Check if the current speed of the device requires IORDY. Used
1191 * by various controllers for chip configuration.
1192 */
1193
1194unsigned int ata_pio_need_iordy(const struct ata_device *adev)
1195{
1196 int pio;
1197 int speed = adev->pio_mode - XFER_PIO_0;
1198
1199 if (speed < 2)
1200 return 0;
1201 if (speed > 2)
1202 return 1;
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05001203
Alan Cox1bc4ccf2006-01-09 17:18:14 +00001204 /* If we have no drive specific rule, then PIO 2 is non IORDY */
1205
1206 if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE */
1207 pio = adev->id[ATA_ID_EIDE_PIO];
1208 /* Is the speed faster than the drive allows non IORDY ? */
1209 if (pio) {
1210 /* This is cycle times not frequency - watch the logic! */
1211 if (pio > 240) /* PIO2 is 240nS per cycle */
1212 return 1;
1213 return 0;
1214 }
1215 }
1216 return 0;
1217}
1218
1219/**
Tejun Heo49016ac2006-02-21 02:12:11 +09001220 * ata_dev_read_id - Read ID data from the specified device
Tejun Heo49016ac2006-02-21 02:12:11 +09001221 * @dev: target device
1222 * @p_class: pointer to class of the target device (may be changed)
1223 * @post_reset: is this read ID post-reset?
Tejun Heofe635c72006-05-15 20:57:35 +09001224 * @id: buffer to read IDENTIFY data into
Tejun Heo49016ac2006-02-21 02:12:11 +09001225 *
1226 * Read ID data from the specified device. ATA_CMD_ID_ATA is
1227 * performed on ATA devices and ATA_CMD_ID_ATAPI on ATAPI
Tejun Heoaec5c3c2006-03-25 01:33:34 +09001228 * devices. This function also issues ATA_CMD_INIT_DEV_PARAMS
1229 * for pre-ATA4 drives.
Tejun Heo49016ac2006-02-21 02:12:11 +09001230 *
1231 * LOCKING:
1232 * Kernel thread context (may sleep)
1233 *
1234 * RETURNS:
1235 * 0 on success, -errno otherwise.
1236 */
Tejun Heoa9beec92006-05-31 18:27:44 +09001237int ata_dev_read_id(struct ata_device *dev, unsigned int *p_class,
1238 int post_reset, u16 *id)
Tejun Heo49016ac2006-02-21 02:12:11 +09001239{
Tejun Heo3373efd2006-05-15 20:57:53 +09001240 struct ata_port *ap = dev->ap;
Tejun Heo49016ac2006-02-21 02:12:11 +09001241 unsigned int class = *p_class;
Tejun Heo49016ac2006-02-21 02:12:11 +09001242 struct ata_taskfile tf;
1243 unsigned int err_mask = 0;
1244 const char *reason;
1245 int rc;
1246
Borislav Petkov0dd4b212006-06-23 02:29:08 -04001247 if (ata_msg_ctl(ap))
Tejun Heo88574552006-06-25 20:00:35 +09001248 ata_dev_printk(dev, KERN_DEBUG, "%s: ENTER, host %u, dev %u\n",
1249 __FUNCTION__, ap->id, dev->devno);
Tejun Heo49016ac2006-02-21 02:12:11 +09001250
Tejun Heo49016ac2006-02-21 02:12:11 +09001251 ata_dev_select(ap, dev->devno, 1, 1); /* select device 0/1 */
1252
1253 retry:
Tejun Heo3373efd2006-05-15 20:57:53 +09001254 ata_tf_init(dev, &tf);
Tejun Heo49016ac2006-02-21 02:12:11 +09001255
1256 switch (class) {
1257 case ATA_DEV_ATA:
1258 tf.command = ATA_CMD_ID_ATA;
1259 break;
1260 case ATA_DEV_ATAPI:
1261 tf.command = ATA_CMD_ID_ATAPI;
1262 break;
1263 default:
1264 rc = -ENODEV;
1265 reason = "unsupported class";
1266 goto err_out;
1267 }
1268
1269 tf.protocol = ATA_PROT_PIO;
1270
Tejun Heo3373efd2006-05-15 20:57:53 +09001271 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_FROM_DEVICE,
Tejun Heo49016ac2006-02-21 02:12:11 +09001272 id, sizeof(id[0]) * ATA_ID_WORDS);
Tejun Heo49016ac2006-02-21 02:12:11 +09001273 if (err_mask) {
1274 rc = -EIO;
1275 reason = "I/O error";
Tejun Heo49016ac2006-02-21 02:12:11 +09001276 goto err_out;
1277 }
1278
1279 swap_buf_le16(id, ATA_ID_WORDS);
1280
Tejun Heo49016ac2006-02-21 02:12:11 +09001281 /* sanity check */
Tejun Heoa4f57492006-09-12 20:35:49 -07001282 rc = -EINVAL;
1283 reason = "device reports illegal type";
1284
1285 if (class == ATA_DEV_ATA) {
1286 if (!ata_id_is_ata(id) && !ata_id_is_cfa(id))
1287 goto err_out;
1288 } else {
1289 if (ata_id_is_ata(id))
1290 goto err_out;
Tejun Heo49016ac2006-02-21 02:12:11 +09001291 }
1292
1293 if (post_reset && class == ATA_DEV_ATA) {
1294 /*
1295 * The exact sequence expected by certain pre-ATA4 drives is:
1296 * SRST RESET
1297 * IDENTIFY
1298 * INITIALIZE DEVICE PARAMETERS
1299 * anything else..
1300 * Some drives were very specific about that exact sequence.
1301 */
1302 if (ata_id_major_version(id) < 4 || !ata_id_has_lba(id)) {
Tejun Heo3373efd2006-05-15 20:57:53 +09001303 err_mask = ata_dev_init_params(dev, id[3], id[6]);
Tejun Heo49016ac2006-02-21 02:12:11 +09001304 if (err_mask) {
1305 rc = -EIO;
1306 reason = "INIT_DEV_PARAMS failed";
1307 goto err_out;
1308 }
1309
1310 /* current CHS translation info (id[53-58]) might be
1311 * changed. reread the identify device info.
1312 */
1313 post_reset = 0;
1314 goto retry;
1315 }
1316 }
1317
1318 *p_class = class;
Tejun Heofe635c72006-05-15 20:57:35 +09001319
Tejun Heo49016ac2006-02-21 02:12:11 +09001320 return 0;
1321
1322 err_out:
Tejun Heo88574552006-06-25 20:00:35 +09001323 if (ata_msg_warn(ap))
Borislav Petkov0dd4b212006-06-23 02:29:08 -04001324 ata_dev_printk(dev, KERN_WARNING, "failed to IDENTIFY "
Tejun Heo88574552006-06-25 20:00:35 +09001325 "(%s, err_mask=0x%x)\n", reason, err_mask);
Tejun Heo49016ac2006-02-21 02:12:11 +09001326 return rc;
1327}
1328
Tejun Heo3373efd2006-05-15 20:57:53 +09001329static inline u8 ata_dev_knobble(struct ata_device *dev)
Tejun Heo4b2f3ed2006-03-01 16:09:36 +09001330{
Tejun Heo3373efd2006-05-15 20:57:53 +09001331 return ((dev->ap->cbl == ATA_CBL_SATA) && (!ata_id_is_sata(dev->id)));
Tejun Heo4b2f3ed2006-03-01 16:09:36 +09001332}
1333
Tejun Heoa6e6ce82006-05-15 21:03:48 +09001334static void ata_dev_config_ncq(struct ata_device *dev,
1335 char *desc, size_t desc_sz)
1336{
1337 struct ata_port *ap = dev->ap;
1338 int hdepth = 0, ddepth = ata_id_queue_depth(dev->id);
1339
1340 if (!ata_id_has_ncq(dev->id)) {
1341 desc[0] = '\0';
1342 return;
1343 }
1344
1345 if (ap->flags & ATA_FLAG_NCQ) {
Jeff Garzikcca39742006-08-24 03:19:22 -04001346 hdepth = min(ap->scsi_host->can_queue, ATA_MAX_QUEUE - 1);
Tejun Heoa6e6ce82006-05-15 21:03:48 +09001347 dev->flags |= ATA_DFLAG_NCQ;
1348 }
1349
1350 if (hdepth >= ddepth)
1351 snprintf(desc, desc_sz, "NCQ (depth %d)", ddepth);
1352 else
1353 snprintf(desc, desc_sz, "NCQ (depth %d/%d)", hdepth, ddepth);
1354}
1355
Brian Kinge6d902a2006-06-28 08:30:31 -05001356static void ata_set_port_max_cmd_len(struct ata_port *ap)
1357{
1358 int i;
1359
Jeff Garzikcca39742006-08-24 03:19:22 -04001360 if (ap->scsi_host) {
1361 unsigned int len = 0;
1362
Brian Kinge6d902a2006-06-28 08:30:31 -05001363 for (i = 0; i < ATA_MAX_DEVICES; i++)
Jeff Garzikcca39742006-08-24 03:19:22 -04001364 len = max(len, ap->device[i].cdb_len);
1365
1366 ap->scsi_host->max_cmd_len = len;
Brian Kinge6d902a2006-06-28 08:30:31 -05001367 }
1368}
1369
Tejun Heo49016ac2006-02-21 02:12:11 +09001370/**
Tejun Heoffeae412006-03-01 16:09:35 +09001371 * ata_dev_configure - Configure the specified ATA/ATAPI device
Tejun Heoffeae412006-03-01 16:09:35 +09001372 * @dev: Target device to configure
Tejun Heo4c2d7212006-03-05 17:55:58 +09001373 * @print_info: Enable device info printout
Linus Torvalds1da177e2005-04-16 15:20:36 -07001374 *
Tejun Heoffeae412006-03-01 16:09:35 +09001375 * Configure @dev according to @dev->id. Generic and low-level
1376 * driver specific fixups are also applied.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001377 *
1378 * LOCKING:
Tejun Heoffeae412006-03-01 16:09:35 +09001379 * Kernel thread context (may sleep)
1380 *
1381 * RETURNS:
1382 * 0 on success, -errno otherwise
Linus Torvalds1da177e2005-04-16 15:20:36 -07001383 */
Tejun Heoa9beec92006-05-31 18:27:44 +09001384int ata_dev_configure(struct ata_device *dev, int print_info)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001385{
Tejun Heo3373efd2006-05-15 20:57:53 +09001386 struct ata_port *ap = dev->ap;
Tejun Heo1148c3a2006-03-13 19:48:04 +09001387 const u16 *id = dev->id;
Tejun Heoff8854b2006-03-06 04:31:56 +09001388 unsigned int xfer_mask;
Alan Coxb352e572006-08-10 18:52:12 +01001389 char revbuf[7]; /* XYZ-99\0 */
Brian Kinge6d902a2006-06-28 08:30:31 -05001390 int rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001391
Borislav Petkov0dd4b212006-06-23 02:29:08 -04001392 if (!ata_dev_enabled(dev) && ata_msg_info(ap)) {
Tejun Heo88574552006-06-25 20:00:35 +09001393 ata_dev_printk(dev, KERN_INFO,
1394 "%s: ENTER/EXIT (host %u, dev %u) -- nodev\n",
1395 __FUNCTION__, ap->id, dev->devno);
Tejun Heoffeae412006-03-01 16:09:35 +09001396 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001397 }
1398
Borislav Petkov0dd4b212006-06-23 02:29:08 -04001399 if (ata_msg_probe(ap))
Tejun Heo88574552006-06-25 20:00:35 +09001400 ata_dev_printk(dev, KERN_DEBUG, "%s: ENTER, host %u, dev %u\n",
1401 __FUNCTION__, ap->id, dev->devno);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001402
Tejun Heoc39f5eb2006-03-13 19:51:19 +09001403 /* print device capabilities */
Borislav Petkov0dd4b212006-06-23 02:29:08 -04001404 if (ata_msg_probe(ap))
Tejun Heo88574552006-06-25 20:00:35 +09001405 ata_dev_printk(dev, KERN_DEBUG,
1406 "%s: cfg 49:%04x 82:%04x 83:%04x 84:%04x "
1407 "85:%04x 86:%04x 87:%04x 88:%04x\n",
Borislav Petkov0dd4b212006-06-23 02:29:08 -04001408 __FUNCTION__,
Tejun Heof15a1da2006-05-15 20:57:56 +09001409 id[49], id[82], id[83], id[84],
1410 id[85], id[86], id[87], id[88]);
Tejun Heoc39f5eb2006-03-13 19:51:19 +09001411
Tejun Heo208a9932006-03-05 17:55:58 +09001412 /* initialize to-be-configured parameters */
Tejun Heoea1dd4e2006-04-02 18:51:53 +09001413 dev->flags &= ~ATA_DFLAG_CFG_MASK;
Tejun Heo208a9932006-03-05 17:55:58 +09001414 dev->max_sectors = 0;
1415 dev->cdb_len = 0;
1416 dev->n_sectors = 0;
1417 dev->cylinders = 0;
1418 dev->heads = 0;
1419 dev->sectors = 0;
1420
Linus Torvalds1da177e2005-04-16 15:20:36 -07001421 /*
1422 * common ATA, ATAPI feature tests
1423 */
1424
Tejun Heoff8854b2006-03-06 04:31:56 +09001425 /* find max transfer mode; for printk only */
Tejun Heo1148c3a2006-03-13 19:48:04 +09001426 xfer_mask = ata_id_xfermask(id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001427
Borislav Petkov0dd4b212006-06-23 02:29:08 -04001428 if (ata_msg_probe(ap))
1429 ata_dump_id(id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001430
1431 /* ATA-specific feature tests */
1432 if (dev->class == ATA_DEV_ATA) {
Alan Coxb352e572006-08-10 18:52:12 +01001433 if (ata_id_is_cfa(id)) {
1434 if (id[162] & 1) /* CPRM may make this media unusable */
1435 ata_dev_printk(dev, KERN_WARNING, "ata%u: device %u supports DRM functions and may not be fully accessable.\n",
1436 ap->id, dev->devno);
1437 snprintf(revbuf, 7, "CFA");
1438 }
1439 else
1440 snprintf(revbuf, 7, "ATA-%d", ata_id_major_version(id));
1441
Tejun Heo1148c3a2006-03-13 19:48:04 +09001442 dev->n_sectors = ata_id_n_sectors(id);
Tejun Heo29407402006-02-12 22:47:04 +09001443
Tejun Heo1148c3a2006-03-13 19:48:04 +09001444 if (ata_id_has_lba(id)) {
Tejun Heo4c2d7212006-03-05 17:55:58 +09001445 const char *lba_desc;
Tejun Heoa6e6ce82006-05-15 21:03:48 +09001446 char ncq_desc[20];
Albert Lee8bf62ec2005-05-12 15:29:42 -04001447
Tejun Heo4c2d7212006-03-05 17:55:58 +09001448 lba_desc = "LBA";
1449 dev->flags |= ATA_DFLAG_LBA;
Tejun Heo1148c3a2006-03-13 19:48:04 +09001450 if (ata_id_has_lba48(id)) {
Albert Lee8bf62ec2005-05-12 15:29:42 -04001451 dev->flags |= ATA_DFLAG_LBA48;
Tejun Heo4c2d7212006-03-05 17:55:58 +09001452 lba_desc = "LBA48";
1453 }
Albert Lee8bf62ec2005-05-12 15:29:42 -04001454
Tejun Heoa6e6ce82006-05-15 21:03:48 +09001455 /* config NCQ */
1456 ata_dev_config_ncq(dev, ncq_desc, sizeof(ncq_desc));
1457
Albert Lee8bf62ec2005-05-12 15:29:42 -04001458 /* print device info to dmesg */
Borislav Petkov5afc8142006-06-27 14:51:25 +02001459 if (ata_msg_drv(ap) && print_info)
Alan Coxb352e572006-08-10 18:52:12 +01001460 ata_dev_printk(dev, KERN_INFO, "%s, "
Tejun Heoa6e6ce82006-05-15 21:03:48 +09001461 "max %s, %Lu sectors: %s %s\n",
Alan Coxb352e572006-08-10 18:52:12 +01001462 revbuf,
Tejun Heof15a1da2006-05-15 20:57:56 +09001463 ata_mode_string(xfer_mask),
1464 (unsigned long long)dev->n_sectors,
Tejun Heoa6e6ce82006-05-15 21:03:48 +09001465 lba_desc, ncq_desc);
Tejun Heoffeae412006-03-01 16:09:35 +09001466 } else {
Albert Lee8bf62ec2005-05-12 15:29:42 -04001467 /* CHS */
1468
1469 /* Default translation */
Tejun Heo1148c3a2006-03-13 19:48:04 +09001470 dev->cylinders = id[1];
1471 dev->heads = id[3];
1472 dev->sectors = id[6];
Albert Lee8bf62ec2005-05-12 15:29:42 -04001473
Tejun Heo1148c3a2006-03-13 19:48:04 +09001474 if (ata_id_current_chs_valid(id)) {
Albert Lee8bf62ec2005-05-12 15:29:42 -04001475 /* Current CHS translation is valid. */
Tejun Heo1148c3a2006-03-13 19:48:04 +09001476 dev->cylinders = id[54];
1477 dev->heads = id[55];
1478 dev->sectors = id[56];
Albert Lee8bf62ec2005-05-12 15:29:42 -04001479 }
1480
1481 /* print device info to dmesg */
Borislav Petkov5afc8142006-06-27 14:51:25 +02001482 if (ata_msg_drv(ap) && print_info)
Alan Coxb352e572006-08-10 18:52:12 +01001483 ata_dev_printk(dev, KERN_INFO, "%s, "
Tejun Heof15a1da2006-05-15 20:57:56 +09001484 "max %s, %Lu sectors: CHS %u/%u/%u\n",
Alan Coxb352e572006-08-10 18:52:12 +01001485 revbuf,
Tejun Heof15a1da2006-05-15 20:57:56 +09001486 ata_mode_string(xfer_mask),
1487 (unsigned long long)dev->n_sectors,
Tejun Heo88574552006-06-25 20:00:35 +09001488 dev->cylinders, dev->heads,
1489 dev->sectors);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001490 }
1491
Albert Lee07f6f7d2005-11-01 19:33:20 +08001492 if (dev->id[59] & 0x100) {
1493 dev->multi_count = dev->id[59] & 0xff;
Borislav Petkov5afc8142006-06-27 14:51:25 +02001494 if (ata_msg_drv(ap) && print_info)
Tejun Heo88574552006-06-25 20:00:35 +09001495 ata_dev_printk(dev, KERN_INFO,
1496 "ata%u: dev %u multi count %u\n",
1497 ap->id, dev->devno, dev->multi_count);
Albert Lee07f6f7d2005-11-01 19:33:20 +08001498 }
1499
Tejun Heo6e7846e2006-02-12 23:32:58 +09001500 dev->cdb_len = 16;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001501 }
1502
1503 /* ATAPI-specific feature tests */
Jeff Garzik2c13b7c2005-11-14 14:14:16 -05001504 else if (dev->class == ATA_DEV_ATAPI) {
Albert Lee08a556d2006-03-31 13:29:04 +08001505 char *cdb_intr_string = "";
1506
Tejun Heo1148c3a2006-03-13 19:48:04 +09001507 rc = atapi_cdb_len(id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001508 if ((rc < 12) || (rc > ATAPI_CDB_LEN)) {
Borislav Petkov0dd4b212006-06-23 02:29:08 -04001509 if (ata_msg_warn(ap))
Tejun Heo88574552006-06-25 20:00:35 +09001510 ata_dev_printk(dev, KERN_WARNING,
1511 "unsupported CDB len\n");
Tejun Heoffeae412006-03-01 16:09:35 +09001512 rc = -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001513 goto err_out_nosup;
1514 }
Tejun Heo6e7846e2006-02-12 23:32:58 +09001515 dev->cdb_len = (unsigned int) rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001516
Albert Lee08a556d2006-03-31 13:29:04 +08001517 if (ata_id_cdb_intr(dev->id)) {
Albert Lee312f7da2005-09-27 17:38:03 +08001518 dev->flags |= ATA_DFLAG_CDB_INTR;
Albert Lee08a556d2006-03-31 13:29:04 +08001519 cdb_intr_string = ", CDB intr";
1520 }
Albert Lee312f7da2005-09-27 17:38:03 +08001521
Linus Torvalds1da177e2005-04-16 15:20:36 -07001522 /* print device info to dmesg */
Borislav Petkov5afc8142006-06-27 14:51:25 +02001523 if (ata_msg_drv(ap) && print_info)
Tejun Heo12436c32006-05-15 20:59:15 +09001524 ata_dev_printk(dev, KERN_INFO, "ATAPI, max %s%s\n",
1525 ata_mode_string(xfer_mask),
1526 cdb_intr_string);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001527 }
1528
Alan Cox93590852006-09-12 16:55:12 +01001529 if (dev->horkage & ATA_HORKAGE_DIAGNOSTIC) {
1530 /* Let the user know. We don't want to disallow opens for
1531 rescue purposes, or in case the vendor is just a blithering
1532 idiot */
1533 if (print_info) {
1534 ata_dev_printk(dev, KERN_WARNING,
1535"Drive reports diagnostics failure. This may indicate a drive\n");
1536 ata_dev_printk(dev, KERN_WARNING,
1537"fault or invalid emulation. Contact drive vendor for information.\n");
1538 }
1539 }
1540
Brian Kinge6d902a2006-06-28 08:30:31 -05001541 ata_set_port_max_cmd_len(ap);
Tejun Heo6e7846e2006-02-12 23:32:58 +09001542
Tejun Heo4b2f3ed2006-03-01 16:09:36 +09001543 /* limit bridge transfers to udma5, 200 sectors */
Tejun Heo3373efd2006-05-15 20:57:53 +09001544 if (ata_dev_knobble(dev)) {
Borislav Petkov5afc8142006-06-27 14:51:25 +02001545 if (ata_msg_drv(ap) && print_info)
Tejun Heof15a1da2006-05-15 20:57:56 +09001546 ata_dev_printk(dev, KERN_INFO,
1547 "applying bridge limits\n");
Tejun Heo5a529132006-03-24 14:07:50 +09001548 dev->udma_mask &= ATA_UDMA5;
Tejun Heo4b2f3ed2006-03-01 16:09:36 +09001549 dev->max_sectors = ATA_MAX_SECTORS;
1550 }
1551
1552 if (ap->ops->dev_config)
1553 ap->ops->dev_config(ap, dev);
1554
Borislav Petkov0dd4b212006-06-23 02:29:08 -04001555 if (ata_msg_probe(ap))
1556 ata_dev_printk(dev, KERN_DEBUG, "%s: EXIT, drv_stat = 0x%x\n",
1557 __FUNCTION__, ata_chk_status(ap));
Tejun Heoffeae412006-03-01 16:09:35 +09001558 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001559
1560err_out_nosup:
Borislav Petkov0dd4b212006-06-23 02:29:08 -04001561 if (ata_msg_probe(ap))
Tejun Heo88574552006-06-25 20:00:35 +09001562 ata_dev_printk(dev, KERN_DEBUG,
1563 "%s: EXIT, err\n", __FUNCTION__);
Tejun Heoffeae412006-03-01 16:09:35 +09001564 return rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001565}
1566
1567/**
1568 * ata_bus_probe - Reset and probe ATA bus
1569 * @ap: Bus to probe
1570 *
Jeff Garzik0cba6322005-05-30 19:49:12 -04001571 * Master ATA bus probing function. Initiates a hardware-dependent
1572 * bus reset, then attempts to identify any devices found on
1573 * the bus.
1574 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07001575 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04001576 * PCI/etc. bus probe sem.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001577 *
1578 * RETURNS:
Tejun Heo96072e62006-04-01 01:38:17 +09001579 * Zero on success, negative errno otherwise.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001580 */
1581
Brian King80289162006-08-07 14:27:31 -05001582int ata_bus_probe(struct ata_port *ap)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001583{
Tejun Heo28ca5c52006-03-01 16:09:36 +09001584 unsigned int classes[ATA_MAX_DEVICES];
Tejun Heo14d2bac2006-04-02 17:54:46 +09001585 int tries[ATA_MAX_DEVICES];
1586 int i, rc, down_xfermask;
Tejun Heoe82cbdb2006-04-01 01:38:18 +09001587 struct ata_device *dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001588
Tejun Heo28ca5c52006-03-01 16:09:36 +09001589 ata_port_probe(ap);
1590
Tejun Heo14d2bac2006-04-02 17:54:46 +09001591 for (i = 0; i < ATA_MAX_DEVICES; i++)
1592 tries[i] = ATA_PROBE_MAX_TRIES;
1593
1594 retry:
1595 down_xfermask = 0;
1596
Tejun Heo20444702006-03-13 01:57:01 +09001597 /* reset and determine device classes */
Tejun Heo52783c52006-05-31 18:28:22 +09001598 ap->ops->phy_reset(ap);
Tejun Heo2061a472006-03-12 00:57:39 +09001599
Tejun Heo52783c52006-05-31 18:28:22 +09001600 for (i = 0; i < ATA_MAX_DEVICES; i++) {
1601 dev = &ap->device[i];
Tejun Heoc19ba8a2006-01-24 17:05:22 +09001602
Tejun Heo52783c52006-05-31 18:28:22 +09001603 if (!(ap->flags & ATA_FLAG_DISABLED) &&
1604 dev->class != ATA_DEV_UNKNOWN)
1605 classes[dev->devno] = dev->class;
1606 else
1607 classes[dev->devno] = ATA_DEV_NONE;
Tejun Heo20444702006-03-13 01:57:01 +09001608
Tejun Heo52783c52006-05-31 18:28:22 +09001609 dev->class = ATA_DEV_UNKNOWN;
Tejun Heo28ca5c52006-03-01 16:09:36 +09001610 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001611
Tejun Heo52783c52006-05-31 18:28:22 +09001612 ata_port_probe(ap);
Tejun Heo20444702006-03-13 01:57:01 +09001613
Alan Coxb6079ca2006-05-22 16:52:06 +01001614 /* after the reset the device state is PIO 0 and the controller
1615 state is undefined. Record the mode */
1616
1617 for (i = 0; i < ATA_MAX_DEVICES; i++)
1618 ap->device[i].pio_mode = XFER_PIO_0;
1619
Tejun Heo28ca5c52006-03-01 16:09:36 +09001620 /* read IDENTIFY page and configure devices */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001621 for (i = 0; i < ATA_MAX_DEVICES; i++) {
Tejun Heoe82cbdb2006-04-01 01:38:18 +09001622 dev = &ap->device[i];
Tejun Heo28ca5c52006-03-01 16:09:36 +09001623
Tejun Heoec573752006-04-11 22:26:29 +09001624 if (tries[i])
1625 dev->class = classes[i];
Tejun Heo14d2bac2006-04-02 17:54:46 +09001626
Tejun Heoe1211e32006-04-01 01:38:18 +09001627 if (!ata_dev_enabled(dev))
Tejun Heoffeae412006-03-01 16:09:35 +09001628 continue;
1629
Tejun Heo3373efd2006-05-15 20:57:53 +09001630 rc = ata_dev_read_id(dev, &dev->class, 1, dev->id);
Tejun Heo14d2bac2006-04-02 17:54:46 +09001631 if (rc)
1632 goto fail;
Tejun Heoffeae412006-03-01 16:09:35 +09001633
Tejun Heo3373efd2006-05-15 20:57:53 +09001634 rc = ata_dev_configure(dev, 1);
Tejun Heo14d2bac2006-04-02 17:54:46 +09001635 if (rc)
1636 goto fail;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001637 }
1638
Tejun Heoe82cbdb2006-04-01 01:38:18 +09001639 /* configure transfer mode */
Tejun Heo3adcebb2006-05-15 20:57:37 +09001640 rc = ata_set_mode(ap, &dev);
Tejun Heo51713d32006-04-11 22:26:29 +09001641 if (rc) {
1642 down_xfermask = 1;
1643 goto fail;
Tejun Heoe82cbdb2006-04-01 01:38:18 +09001644 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001645
Tejun Heoe82cbdb2006-04-01 01:38:18 +09001646 for (i = 0; i < ATA_MAX_DEVICES; i++)
1647 if (ata_dev_enabled(&ap->device[i]))
1648 return 0;
Alan Coxe35a9e02006-03-27 18:46:37 +01001649
Tejun Heoe82cbdb2006-04-01 01:38:18 +09001650 /* no device present, disable port */
1651 ata_port_disable(ap);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001652 ap->ops->port_disable(ap);
Tejun Heo96072e62006-04-01 01:38:17 +09001653 return -ENODEV;
Tejun Heo14d2bac2006-04-02 17:54:46 +09001654
1655 fail:
1656 switch (rc) {
1657 case -EINVAL:
1658 case -ENODEV:
1659 tries[dev->devno] = 0;
1660 break;
1661 case -EIO:
Tejun Heo3c567b72006-05-15 20:57:23 +09001662 sata_down_spd_limit(ap);
Tejun Heo14d2bac2006-04-02 17:54:46 +09001663 /* fall through */
1664 default:
1665 tries[dev->devno]--;
1666 if (down_xfermask &&
Tejun Heo3373efd2006-05-15 20:57:53 +09001667 ata_down_xfermask_limit(dev, tries[dev->devno] == 1))
Tejun Heo14d2bac2006-04-02 17:54:46 +09001668 tries[dev->devno] = 0;
1669 }
1670
Tejun Heoec573752006-04-11 22:26:29 +09001671 if (!tries[dev->devno]) {
Tejun Heo3373efd2006-05-15 20:57:53 +09001672 ata_down_xfermask_limit(dev, 1);
1673 ata_dev_disable(dev);
Tejun Heoec573752006-04-11 22:26:29 +09001674 }
1675
Tejun Heo14d2bac2006-04-02 17:54:46 +09001676 goto retry;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001677}
1678
1679/**
Jeff Garzik0cba6322005-05-30 19:49:12 -04001680 * ata_port_probe - Mark port as enabled
1681 * @ap: Port for which we indicate enablement
Linus Torvalds1da177e2005-04-16 15:20:36 -07001682 *
Jeff Garzik0cba6322005-05-30 19:49:12 -04001683 * Modify @ap data structure such that the system
1684 * thinks that the entire port is enabled.
1685 *
Jeff Garzikcca39742006-08-24 03:19:22 -04001686 * LOCKING: host lock, or some other form of
Jeff Garzik0cba6322005-05-30 19:49:12 -04001687 * serialization.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001688 */
1689
1690void ata_port_probe(struct ata_port *ap)
1691{
Tejun Heo198e0fe2006-04-02 18:51:52 +09001692 ap->flags &= ~ATA_FLAG_DISABLED;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001693}
1694
1695/**
Tejun Heo3be680b2005-12-19 22:35:02 +09001696 * sata_print_link_status - Print SATA link status
1697 * @ap: SATA port to printk link status about
1698 *
1699 * This function prints link speed and status of a SATA link.
1700 *
1701 * LOCKING:
1702 * None.
1703 */
1704static void sata_print_link_status(struct ata_port *ap)
1705{
Tejun Heo6d5f9732006-04-03 00:09:41 +09001706 u32 sstatus, scontrol, tmp;
Tejun Heo3be680b2005-12-19 22:35:02 +09001707
Tejun Heo81952c52006-05-15 20:57:47 +09001708 if (sata_scr_read(ap, SCR_STATUS, &sstatus))
Tejun Heo3be680b2005-12-19 22:35:02 +09001709 return;
Tejun Heo81952c52006-05-15 20:57:47 +09001710 sata_scr_read(ap, SCR_CONTROL, &scontrol);
Tejun Heo3be680b2005-12-19 22:35:02 +09001711
Tejun Heo81952c52006-05-15 20:57:47 +09001712 if (ata_port_online(ap)) {
Tejun Heo3be680b2005-12-19 22:35:02 +09001713 tmp = (sstatus >> 4) & 0xf;
Tejun Heof15a1da2006-05-15 20:57:56 +09001714 ata_port_printk(ap, KERN_INFO,
1715 "SATA link up %s (SStatus %X SControl %X)\n",
1716 sata_spd_string(tmp), sstatus, scontrol);
Tejun Heo3be680b2005-12-19 22:35:02 +09001717 } else {
Tejun Heof15a1da2006-05-15 20:57:56 +09001718 ata_port_printk(ap, KERN_INFO,
1719 "SATA link down (SStatus %X SControl %X)\n",
1720 sstatus, scontrol);
Tejun Heo3be680b2005-12-19 22:35:02 +09001721 }
1722}
1723
1724/**
Jeff Garzik780a87f2005-05-30 15:41:05 -04001725 * __sata_phy_reset - Wake/reset a low-level SATA PHY
1726 * @ap: SATA port associated with target SATA PHY.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001727 *
Jeff Garzik780a87f2005-05-30 15:41:05 -04001728 * This function issues commands to standard SATA Sxxx
1729 * PHY registers, to wake up the phy (and device), and
1730 * clear any reset condition.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001731 *
1732 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04001733 * PCI/etc. bus probe sem.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001734 *
1735 */
1736void __sata_phy_reset(struct ata_port *ap)
1737{
1738 u32 sstatus;
1739 unsigned long timeout = jiffies + (HZ * 5);
1740
1741 if (ap->flags & ATA_FLAG_SATA_RESET) {
Brett Russcdcca892005-03-28 15:10:27 -05001742 /* issue phy wake/reset */
Tejun Heo81952c52006-05-15 20:57:47 +09001743 sata_scr_write_flush(ap, SCR_CONTROL, 0x301);
Tejun Heo62ba2842005-06-26 23:27:19 +09001744 /* Couldn't find anything in SATA I/II specs, but
1745 * AHCI-1.1 10.4.2 says at least 1 ms. */
1746 mdelay(1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001747 }
Tejun Heo81952c52006-05-15 20:57:47 +09001748 /* phy wake/clear reset */
1749 sata_scr_write_flush(ap, SCR_CONTROL, 0x300);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001750
1751 /* wait for phy to become ready, if necessary */
1752 do {
1753 msleep(200);
Tejun Heo81952c52006-05-15 20:57:47 +09001754 sata_scr_read(ap, SCR_STATUS, &sstatus);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001755 if ((sstatus & 0xf) != 1)
1756 break;
1757 } while (time_before(jiffies, timeout));
1758
Tejun Heo3be680b2005-12-19 22:35:02 +09001759 /* print link status */
1760 sata_print_link_status(ap);
Jeff Garzik656563e2005-11-20 03:36:45 -05001761
Tejun Heo3be680b2005-12-19 22:35:02 +09001762 /* TODO: phy layer with polling, timeouts, etc. */
Tejun Heo81952c52006-05-15 20:57:47 +09001763 if (!ata_port_offline(ap))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001764 ata_port_probe(ap);
Tejun Heo3be680b2005-12-19 22:35:02 +09001765 else
Linus Torvalds1da177e2005-04-16 15:20:36 -07001766 ata_port_disable(ap);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001767
Tejun Heo198e0fe2006-04-02 18:51:52 +09001768 if (ap->flags & ATA_FLAG_DISABLED)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001769 return;
1770
1771 if (ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT)) {
1772 ata_port_disable(ap);
1773 return;
1774 }
1775
1776 ap->cbl = ATA_CBL_SATA;
1777}
1778
1779/**
Jeff Garzik780a87f2005-05-30 15:41:05 -04001780 * sata_phy_reset - Reset SATA bus.
1781 * @ap: SATA port associated with target SATA PHY.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001782 *
Jeff Garzik780a87f2005-05-30 15:41:05 -04001783 * This function resets the SATA bus, and then probes
1784 * the bus for devices.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001785 *
1786 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04001787 * PCI/etc. bus probe sem.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001788 *
1789 */
1790void sata_phy_reset(struct ata_port *ap)
1791{
1792 __sata_phy_reset(ap);
Tejun Heo198e0fe2006-04-02 18:51:52 +09001793 if (ap->flags & ATA_FLAG_DISABLED)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001794 return;
1795 ata_bus_reset(ap);
1796}
1797
1798/**
Alan Coxebdfca62006-03-23 15:38:34 +00001799 * ata_dev_pair - return other device on cable
Alan Coxebdfca62006-03-23 15:38:34 +00001800 * @adev: device
1801 *
1802 * Obtain the other device on the same cable, or if none is
1803 * present NULL is returned
1804 */
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05001805
Tejun Heo3373efd2006-05-15 20:57:53 +09001806struct ata_device *ata_dev_pair(struct ata_device *adev)
Alan Coxebdfca62006-03-23 15:38:34 +00001807{
Tejun Heo3373efd2006-05-15 20:57:53 +09001808 struct ata_port *ap = adev->ap;
Alan Coxebdfca62006-03-23 15:38:34 +00001809 struct ata_device *pair = &ap->device[1 - adev->devno];
Tejun Heoe1211e32006-04-01 01:38:18 +09001810 if (!ata_dev_enabled(pair))
Alan Coxebdfca62006-03-23 15:38:34 +00001811 return NULL;
1812 return pair;
1813}
1814
1815/**
Jeff Garzik780a87f2005-05-30 15:41:05 -04001816 * ata_port_disable - Disable port.
1817 * @ap: Port to be disabled.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001818 *
Jeff Garzik780a87f2005-05-30 15:41:05 -04001819 * Modify @ap data structure such that the system
1820 * thinks that the entire port is disabled, and should
1821 * never attempt to probe or communicate with devices
1822 * on this port.
1823 *
Jeff Garzikcca39742006-08-24 03:19:22 -04001824 * LOCKING: host lock, or some other form of
Jeff Garzik780a87f2005-05-30 15:41:05 -04001825 * serialization.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001826 */
1827
1828void ata_port_disable(struct ata_port *ap)
1829{
1830 ap->device[0].class = ATA_DEV_NONE;
1831 ap->device[1].class = ATA_DEV_NONE;
Tejun Heo198e0fe2006-04-02 18:51:52 +09001832 ap->flags |= ATA_FLAG_DISABLED;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001833}
1834
Tejun Heo1c3fae42006-04-02 20:53:28 +09001835/**
Tejun Heo3c567b72006-05-15 20:57:23 +09001836 * sata_down_spd_limit - adjust SATA spd limit downward
Tejun Heo1c3fae42006-04-02 20:53:28 +09001837 * @ap: Port to adjust SATA spd limit for
1838 *
1839 * Adjust SATA spd limit of @ap downward. Note that this
1840 * function only adjusts the limit. The change must be applied
Tejun Heo3c567b72006-05-15 20:57:23 +09001841 * using sata_set_spd().
Tejun Heo1c3fae42006-04-02 20:53:28 +09001842 *
1843 * LOCKING:
1844 * Inherited from caller.
1845 *
1846 * RETURNS:
1847 * 0 on success, negative errno on failure
1848 */
Tejun Heo3c567b72006-05-15 20:57:23 +09001849int sata_down_spd_limit(struct ata_port *ap)
Tejun Heo1c3fae42006-04-02 20:53:28 +09001850{
Tejun Heo81952c52006-05-15 20:57:47 +09001851 u32 sstatus, spd, mask;
1852 int rc, highbit;
Tejun Heo1c3fae42006-04-02 20:53:28 +09001853
Tejun Heo81952c52006-05-15 20:57:47 +09001854 rc = sata_scr_read(ap, SCR_STATUS, &sstatus);
1855 if (rc)
1856 return rc;
Tejun Heo1c3fae42006-04-02 20:53:28 +09001857
1858 mask = ap->sata_spd_limit;
1859 if (mask <= 1)
1860 return -EINVAL;
1861 highbit = fls(mask) - 1;
1862 mask &= ~(1 << highbit);
1863
Tejun Heo81952c52006-05-15 20:57:47 +09001864 spd = (sstatus >> 4) & 0xf;
Tejun Heo1c3fae42006-04-02 20:53:28 +09001865 if (spd <= 1)
1866 return -EINVAL;
1867 spd--;
1868 mask &= (1 << spd) - 1;
1869 if (!mask)
1870 return -EINVAL;
1871
1872 ap->sata_spd_limit = mask;
1873
Tejun Heof15a1da2006-05-15 20:57:56 +09001874 ata_port_printk(ap, KERN_WARNING, "limiting SATA link speed to %s\n",
1875 sata_spd_string(fls(mask)));
Tejun Heo1c3fae42006-04-02 20:53:28 +09001876
1877 return 0;
1878}
1879
Tejun Heo3c567b72006-05-15 20:57:23 +09001880static int __sata_set_spd_needed(struct ata_port *ap, u32 *scontrol)
Tejun Heo1c3fae42006-04-02 20:53:28 +09001881{
1882 u32 spd, limit;
1883
1884 if (ap->sata_spd_limit == UINT_MAX)
1885 limit = 0;
1886 else
1887 limit = fls(ap->sata_spd_limit);
1888
1889 spd = (*scontrol >> 4) & 0xf;
1890 *scontrol = (*scontrol & ~0xf0) | ((limit & 0xf) << 4);
1891
1892 return spd != limit;
1893}
1894
1895/**
Tejun Heo3c567b72006-05-15 20:57:23 +09001896 * sata_set_spd_needed - is SATA spd configuration needed
Tejun Heo1c3fae42006-04-02 20:53:28 +09001897 * @ap: Port in question
1898 *
1899 * Test whether the spd limit in SControl matches
1900 * @ap->sata_spd_limit. This function is used to determine
1901 * whether hardreset is necessary to apply SATA spd
1902 * configuration.
1903 *
1904 * LOCKING:
1905 * Inherited from caller.
1906 *
1907 * RETURNS:
1908 * 1 if SATA spd configuration is needed, 0 otherwise.
1909 */
Tejun Heo3c567b72006-05-15 20:57:23 +09001910int sata_set_spd_needed(struct ata_port *ap)
Tejun Heo1c3fae42006-04-02 20:53:28 +09001911{
1912 u32 scontrol;
1913
Tejun Heo81952c52006-05-15 20:57:47 +09001914 if (sata_scr_read(ap, SCR_CONTROL, &scontrol))
Tejun Heo1c3fae42006-04-02 20:53:28 +09001915 return 0;
1916
Tejun Heo3c567b72006-05-15 20:57:23 +09001917 return __sata_set_spd_needed(ap, &scontrol);
Tejun Heo1c3fae42006-04-02 20:53:28 +09001918}
1919
1920/**
Tejun Heo3c567b72006-05-15 20:57:23 +09001921 * sata_set_spd - set SATA spd according to spd limit
Tejun Heo1c3fae42006-04-02 20:53:28 +09001922 * @ap: Port to set SATA spd for
1923 *
1924 * Set SATA spd of @ap according to sata_spd_limit.
1925 *
1926 * LOCKING:
1927 * Inherited from caller.
1928 *
1929 * RETURNS:
1930 * 0 if spd doesn't need to be changed, 1 if spd has been
Tejun Heo81952c52006-05-15 20:57:47 +09001931 * changed. Negative errno if SCR registers are inaccessible.
Tejun Heo1c3fae42006-04-02 20:53:28 +09001932 */
Tejun Heo3c567b72006-05-15 20:57:23 +09001933int sata_set_spd(struct ata_port *ap)
Tejun Heo1c3fae42006-04-02 20:53:28 +09001934{
1935 u32 scontrol;
Tejun Heo81952c52006-05-15 20:57:47 +09001936 int rc;
Tejun Heo1c3fae42006-04-02 20:53:28 +09001937
Tejun Heo81952c52006-05-15 20:57:47 +09001938 if ((rc = sata_scr_read(ap, SCR_CONTROL, &scontrol)))
1939 return rc;
Tejun Heo1c3fae42006-04-02 20:53:28 +09001940
Tejun Heo3c567b72006-05-15 20:57:23 +09001941 if (!__sata_set_spd_needed(ap, &scontrol))
Tejun Heo1c3fae42006-04-02 20:53:28 +09001942 return 0;
1943
Tejun Heo81952c52006-05-15 20:57:47 +09001944 if ((rc = sata_scr_write(ap, SCR_CONTROL, scontrol)))
1945 return rc;
1946
Tejun Heo1c3fae42006-04-02 20:53:28 +09001947 return 1;
1948}
1949
Alan Cox452503f2005-10-21 19:01:32 -04001950/*
1951 * This mode timing computation functionality is ported over from
1952 * drivers/ide/ide-timing.h and was originally written by Vojtech Pavlik
1953 */
1954/*
Alan Coxb352e572006-08-10 18:52:12 +01001955 * PIO 0-4, MWDMA 0-2 and UDMA 0-6 timings (in nanoseconds).
Alan Cox452503f2005-10-21 19:01:32 -04001956 * These were taken from ATA/ATAPI-6 standard, rev 0a, except
Alan Coxb352e572006-08-10 18:52:12 +01001957 * for UDMA6, which is currently supported only by Maxtor drives.
1958 *
1959 * For PIO 5/6 MWDMA 3/4 see the CFA specification 3.0.
Alan Cox452503f2005-10-21 19:01:32 -04001960 */
1961
1962static const struct ata_timing ata_timing[] = {
1963
1964 { XFER_UDMA_6, 0, 0, 0, 0, 0, 0, 0, 15 },
1965 { XFER_UDMA_5, 0, 0, 0, 0, 0, 0, 0, 20 },
1966 { XFER_UDMA_4, 0, 0, 0, 0, 0, 0, 0, 30 },
1967 { XFER_UDMA_3, 0, 0, 0, 0, 0, 0, 0, 45 },
1968
Alan Coxb352e572006-08-10 18:52:12 +01001969 { XFER_MW_DMA_4, 25, 0, 0, 0, 55, 20, 80, 0 },
1970 { XFER_MW_DMA_3, 25, 0, 0, 0, 65, 25, 100, 0 },
Alan Cox452503f2005-10-21 19:01:32 -04001971 { XFER_UDMA_2, 0, 0, 0, 0, 0, 0, 0, 60 },
1972 { XFER_UDMA_1, 0, 0, 0, 0, 0, 0, 0, 80 },
1973 { XFER_UDMA_0, 0, 0, 0, 0, 0, 0, 0, 120 },
1974
1975/* { XFER_UDMA_SLOW, 0, 0, 0, 0, 0, 0, 0, 150 }, */
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05001976
Alan Cox452503f2005-10-21 19:01:32 -04001977 { XFER_MW_DMA_2, 25, 0, 0, 0, 70, 25, 120, 0 },
1978 { XFER_MW_DMA_1, 45, 0, 0, 0, 80, 50, 150, 0 },
1979 { XFER_MW_DMA_0, 60, 0, 0, 0, 215, 215, 480, 0 },
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05001980
Alan Cox452503f2005-10-21 19:01:32 -04001981 { XFER_SW_DMA_2, 60, 0, 0, 0, 120, 120, 240, 0 },
1982 { XFER_SW_DMA_1, 90, 0, 0, 0, 240, 240, 480, 0 },
1983 { XFER_SW_DMA_0, 120, 0, 0, 0, 480, 480, 960, 0 },
1984
Alan Coxb352e572006-08-10 18:52:12 +01001985 { XFER_PIO_6, 10, 55, 20, 80, 55, 20, 80, 0 },
1986 { XFER_PIO_5, 15, 65, 25, 100, 65, 25, 100, 0 },
Alan Cox452503f2005-10-21 19:01:32 -04001987 { XFER_PIO_4, 25, 70, 25, 120, 70, 25, 120, 0 },
1988 { XFER_PIO_3, 30, 80, 70, 180, 80, 70, 180, 0 },
1989
1990 { XFER_PIO_2, 30, 290, 40, 330, 100, 90, 240, 0 },
1991 { XFER_PIO_1, 50, 290, 93, 383, 125, 100, 383, 0 },
1992 { XFER_PIO_0, 70, 290, 240, 600, 165, 150, 600, 0 },
1993
1994/* { XFER_PIO_SLOW, 120, 290, 240, 960, 290, 240, 960, 0 }, */
1995
1996 { 0xFF }
1997};
1998
1999#define ENOUGH(v,unit) (((v)-1)/(unit)+1)
2000#define EZ(v,unit) ((v)?ENOUGH(v,unit):0)
2001
2002static void ata_timing_quantize(const struct ata_timing *t, struct ata_timing *q, int T, int UT)
2003{
2004 q->setup = EZ(t->setup * 1000, T);
2005 q->act8b = EZ(t->act8b * 1000, T);
2006 q->rec8b = EZ(t->rec8b * 1000, T);
2007 q->cyc8b = EZ(t->cyc8b * 1000, T);
2008 q->active = EZ(t->active * 1000, T);
2009 q->recover = EZ(t->recover * 1000, T);
2010 q->cycle = EZ(t->cycle * 1000, T);
2011 q->udma = EZ(t->udma * 1000, UT);
2012}
2013
2014void ata_timing_merge(const struct ata_timing *a, const struct ata_timing *b,
2015 struct ata_timing *m, unsigned int what)
2016{
2017 if (what & ATA_TIMING_SETUP ) m->setup = max(a->setup, b->setup);
2018 if (what & ATA_TIMING_ACT8B ) m->act8b = max(a->act8b, b->act8b);
2019 if (what & ATA_TIMING_REC8B ) m->rec8b = max(a->rec8b, b->rec8b);
2020 if (what & ATA_TIMING_CYC8B ) m->cyc8b = max(a->cyc8b, b->cyc8b);
2021 if (what & ATA_TIMING_ACTIVE ) m->active = max(a->active, b->active);
2022 if (what & ATA_TIMING_RECOVER) m->recover = max(a->recover, b->recover);
2023 if (what & ATA_TIMING_CYCLE ) m->cycle = max(a->cycle, b->cycle);
2024 if (what & ATA_TIMING_UDMA ) m->udma = max(a->udma, b->udma);
2025}
2026
2027static const struct ata_timing* ata_timing_find_mode(unsigned short speed)
2028{
2029 const struct ata_timing *t;
2030
2031 for (t = ata_timing; t->mode != speed; t++)
Alan Cox91190752005-10-26 12:17:46 -04002032 if (t->mode == 0xFF)
Alan Cox452503f2005-10-21 19:01:32 -04002033 return NULL;
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05002034 return t;
Alan Cox452503f2005-10-21 19:01:32 -04002035}
2036
2037int ata_timing_compute(struct ata_device *adev, unsigned short speed,
2038 struct ata_timing *t, int T, int UT)
2039{
2040 const struct ata_timing *s;
2041 struct ata_timing p;
2042
2043 /*
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05002044 * Find the mode.
Albert Lee75b1f2f2005-11-16 17:06:18 +08002045 */
Alan Cox452503f2005-10-21 19:01:32 -04002046
2047 if (!(s = ata_timing_find_mode(speed)))
2048 return -EINVAL;
2049
Albert Lee75b1f2f2005-11-16 17:06:18 +08002050 memcpy(t, s, sizeof(*s));
2051
Alan Cox452503f2005-10-21 19:01:32 -04002052 /*
2053 * If the drive is an EIDE drive, it can tell us it needs extended
2054 * PIO/MW_DMA cycle timing.
2055 */
2056
2057 if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE drive */
2058 memset(&p, 0, sizeof(p));
2059 if(speed >= XFER_PIO_0 && speed <= XFER_SW_DMA_0) {
2060 if (speed <= XFER_PIO_2) p.cycle = p.cyc8b = adev->id[ATA_ID_EIDE_PIO];
2061 else p.cycle = p.cyc8b = adev->id[ATA_ID_EIDE_PIO_IORDY];
2062 } else if(speed >= XFER_MW_DMA_0 && speed <= XFER_MW_DMA_2) {
2063 p.cycle = adev->id[ATA_ID_EIDE_DMA_MIN];
2064 }
2065 ata_timing_merge(&p, t, t, ATA_TIMING_CYCLE | ATA_TIMING_CYC8B);
2066 }
2067
2068 /*
2069 * Convert the timing to bus clock counts.
2070 */
2071
Albert Lee75b1f2f2005-11-16 17:06:18 +08002072 ata_timing_quantize(t, t, T, UT);
Alan Cox452503f2005-10-21 19:01:32 -04002073
2074 /*
Randy Dunlapc893a3a2006-01-28 13:15:32 -05002075 * Even in DMA/UDMA modes we still use PIO access for IDENTIFY,
2076 * S.M.A.R.T * and some other commands. We have to ensure that the
2077 * DMA cycle timing is slower/equal than the fastest PIO timing.
Alan Cox452503f2005-10-21 19:01:32 -04002078 */
2079
2080 if (speed > XFER_PIO_4) {
2081 ata_timing_compute(adev, adev->pio_mode, &p, T, UT);
2082 ata_timing_merge(&p, t, t, ATA_TIMING_ALL);
2083 }
2084
2085 /*
Randy Dunlapc893a3a2006-01-28 13:15:32 -05002086 * Lengthen active & recovery time so that cycle time is correct.
Alan Cox452503f2005-10-21 19:01:32 -04002087 */
2088
2089 if (t->act8b + t->rec8b < t->cyc8b) {
2090 t->act8b += (t->cyc8b - (t->act8b + t->rec8b)) / 2;
2091 t->rec8b = t->cyc8b - t->act8b;
2092 }
2093
2094 if (t->active + t->recover < t->cycle) {
2095 t->active += (t->cycle - (t->active + t->recover)) / 2;
2096 t->recover = t->cycle - t->active;
2097 }
2098
2099 return 0;
2100}
2101
Tejun Heocf176e12006-04-02 17:54:46 +09002102/**
2103 * ata_down_xfermask_limit - adjust dev xfer masks downward
Tejun Heocf176e12006-04-02 17:54:46 +09002104 * @dev: Device to adjust xfer masks
2105 * @force_pio0: Force PIO0
2106 *
2107 * Adjust xfer masks of @dev downward. Note that this function
2108 * does not apply the change. Invoking ata_set_mode() afterwards
2109 * will apply the limit.
2110 *
2111 * LOCKING:
2112 * Inherited from caller.
2113 *
2114 * RETURNS:
2115 * 0 on success, negative errno on failure
2116 */
Tejun Heo3373efd2006-05-15 20:57:53 +09002117int ata_down_xfermask_limit(struct ata_device *dev, int force_pio0)
Tejun Heocf176e12006-04-02 17:54:46 +09002118{
2119 unsigned long xfer_mask;
2120 int highbit;
2121
2122 xfer_mask = ata_pack_xfermask(dev->pio_mask, dev->mwdma_mask,
2123 dev->udma_mask);
2124
2125 if (!xfer_mask)
2126 goto fail;
2127 /* don't gear down to MWDMA from UDMA, go directly to PIO */
2128 if (xfer_mask & ATA_MASK_UDMA)
2129 xfer_mask &= ~ATA_MASK_MWDMA;
2130
2131 highbit = fls(xfer_mask) - 1;
2132 xfer_mask &= ~(1 << highbit);
2133 if (force_pio0)
2134 xfer_mask &= 1 << ATA_SHIFT_PIO;
2135 if (!xfer_mask)
2136 goto fail;
2137
2138 ata_unpack_xfermask(xfer_mask, &dev->pio_mask, &dev->mwdma_mask,
2139 &dev->udma_mask);
2140
Tejun Heof15a1da2006-05-15 20:57:56 +09002141 ata_dev_printk(dev, KERN_WARNING, "limiting speed to %s\n",
2142 ata_mode_string(xfer_mask));
Tejun Heocf176e12006-04-02 17:54:46 +09002143
2144 return 0;
2145
2146 fail:
2147 return -EINVAL;
2148}
2149
Tejun Heo3373efd2006-05-15 20:57:53 +09002150static int ata_dev_set_mode(struct ata_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002151{
Tejun Heo83206a22006-03-24 15:25:31 +09002152 unsigned int err_mask;
2153 int rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002154
Tejun Heoe8384602006-04-02 18:51:53 +09002155 dev->flags &= ~ATA_DFLAG_PIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002156 if (dev->xfer_shift == ATA_SHIFT_PIO)
2157 dev->flags |= ATA_DFLAG_PIO;
2158
Tejun Heo3373efd2006-05-15 20:57:53 +09002159 err_mask = ata_dev_set_xfermode(dev);
Tejun Heo83206a22006-03-24 15:25:31 +09002160 if (err_mask) {
Tejun Heof15a1da2006-05-15 20:57:56 +09002161 ata_dev_printk(dev, KERN_ERR, "failed to set xfermode "
2162 "(err_mask=0x%x)\n", err_mask);
Tejun Heo83206a22006-03-24 15:25:31 +09002163 return -EIO;
2164 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002165
Tejun Heo3373efd2006-05-15 20:57:53 +09002166 rc = ata_dev_revalidate(dev, 0);
Tejun Heo5eb45c02006-04-02 18:51:52 +09002167 if (rc)
Tejun Heo83206a22006-03-24 15:25:31 +09002168 return rc;
Tejun Heo48a8a142006-03-05 17:55:58 +09002169
Tejun Heo23e71c32006-03-06 04:31:57 +09002170 DPRINTK("xfer_shift=%u, xfer_mode=0x%x\n",
2171 dev->xfer_shift, (int)dev->xfer_mode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002172
Tejun Heof15a1da2006-05-15 20:57:56 +09002173 ata_dev_printk(dev, KERN_INFO, "configured for %s\n",
2174 ata_mode_string(ata_xfer_mode2mask(dev->xfer_mode)));
Tejun Heo83206a22006-03-24 15:25:31 +09002175 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002176}
2177
Linus Torvalds1da177e2005-04-16 15:20:36 -07002178/**
2179 * ata_set_mode - Program timings and issue SET FEATURES - XFER
2180 * @ap: port on which timings will be programmed
Tejun Heoe82cbdb2006-04-01 01:38:18 +09002181 * @r_failed_dev: out paramter for failed device
Linus Torvalds1da177e2005-04-16 15:20:36 -07002182 *
Tejun Heoe82cbdb2006-04-01 01:38:18 +09002183 * Set ATA device disk transfer mode (PIO3, UDMA6, etc.). If
2184 * ata_set_mode() fails, pointer to the failing device is
2185 * returned in @r_failed_dev.
Jeff Garzik780a87f2005-05-30 15:41:05 -04002186 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07002187 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04002188 * PCI/etc. bus probe sem.
Tejun Heoe82cbdb2006-04-01 01:38:18 +09002189 *
2190 * RETURNS:
2191 * 0 on success, negative errno otherwise
Linus Torvalds1da177e2005-04-16 15:20:36 -07002192 */
Tejun Heo1ad8e7f2006-04-02 18:51:53 +09002193int ata_set_mode(struct ata_port *ap, struct ata_device **r_failed_dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002194{
Tejun Heoe8e06192006-04-01 01:38:18 +09002195 struct ata_device *dev;
Tejun Heoe82cbdb2006-04-01 01:38:18 +09002196 int i, rc = 0, used_dma = 0, found = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002197
Tejun Heo3adcebb2006-05-15 20:57:37 +09002198 /* has private set_mode? */
2199 if (ap->ops->set_mode) {
2200 /* FIXME: make ->set_mode handle no device case and
2201 * return error code and failing device on failure.
2202 */
2203 for (i = 0; i < ATA_MAX_DEVICES; i++) {
Tejun Heo02670bf2006-07-03 16:07:26 +09002204 if (ata_dev_ready(&ap->device[i])) {
Tejun Heo3adcebb2006-05-15 20:57:37 +09002205 ap->ops->set_mode(ap);
2206 break;
2207 }
2208 }
2209 return 0;
2210 }
2211
Tejun Heoa6d5a512006-03-06 04:31:57 +09002212 /* step 1: calculate xfer_mask */
2213 for (i = 0; i < ATA_MAX_DEVICES; i++) {
Tejun Heoacf356b2006-03-24 14:07:50 +09002214 unsigned int pio_mask, dma_mask;
Tejun Heoa6d5a512006-03-06 04:31:57 +09002215
Tejun Heoe8e06192006-04-01 01:38:18 +09002216 dev = &ap->device[i];
2217
Tejun Heoe1211e32006-04-01 01:38:18 +09002218 if (!ata_dev_enabled(dev))
Tejun Heoa6d5a512006-03-06 04:31:57 +09002219 continue;
2220
Tejun Heo3373efd2006-05-15 20:57:53 +09002221 ata_dev_xfermask(dev);
Tejun Heoa6d5a512006-03-06 04:31:57 +09002222
Tejun Heoacf356b2006-03-24 14:07:50 +09002223 pio_mask = ata_pack_xfermask(dev->pio_mask, 0, 0);
2224 dma_mask = ata_pack_xfermask(0, dev->mwdma_mask, dev->udma_mask);
2225 dev->pio_mode = ata_xfer_mask2mode(pio_mask);
2226 dev->dma_mode = ata_xfer_mask2mode(dma_mask);
Alan Cox5444a6f2006-03-27 18:58:20 +01002227
Tejun Heo4f659772006-04-01 01:38:18 +09002228 found = 1;
Alan Cox5444a6f2006-03-27 18:58:20 +01002229 if (dev->dma_mode)
2230 used_dma = 1;
Tejun Heoa6d5a512006-03-06 04:31:57 +09002231 }
Tejun Heo4f659772006-04-01 01:38:18 +09002232 if (!found)
Tejun Heoe82cbdb2006-04-01 01:38:18 +09002233 goto out;
Tejun Heoa6d5a512006-03-06 04:31:57 +09002234
2235 /* step 2: always set host PIO timings */
Tejun Heoe8e06192006-04-01 01:38:18 +09002236 for (i = 0; i < ATA_MAX_DEVICES; i++) {
2237 dev = &ap->device[i];
2238 if (!ata_dev_enabled(dev))
2239 continue;
2240
2241 if (!dev->pio_mode) {
Tejun Heof15a1da2006-05-15 20:57:56 +09002242 ata_dev_printk(dev, KERN_WARNING, "no PIO support\n");
Tejun Heoe8e06192006-04-01 01:38:18 +09002243 rc = -EINVAL;
Tejun Heoe82cbdb2006-04-01 01:38:18 +09002244 goto out;
Tejun Heoe8e06192006-04-01 01:38:18 +09002245 }
2246
2247 dev->xfer_mode = dev->pio_mode;
2248 dev->xfer_shift = ATA_SHIFT_PIO;
2249 if (ap->ops->set_piomode)
2250 ap->ops->set_piomode(ap, dev);
2251 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002252
Tejun Heoa6d5a512006-03-06 04:31:57 +09002253 /* step 3: set host DMA timings */
Tejun Heoe8e06192006-04-01 01:38:18 +09002254 for (i = 0; i < ATA_MAX_DEVICES; i++) {
2255 dev = &ap->device[i];
2256
2257 if (!ata_dev_enabled(dev) || !dev->dma_mode)
2258 continue;
2259
2260 dev->xfer_mode = dev->dma_mode;
2261 dev->xfer_shift = ata_xfer_mode2shift(dev->dma_mode);
2262 if (ap->ops->set_dmamode)
2263 ap->ops->set_dmamode(ap, dev);
2264 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002265
2266 /* step 4: update devices' xfer mode */
Tejun Heo83206a22006-03-24 15:25:31 +09002267 for (i = 0; i < ATA_MAX_DEVICES; i++) {
Tejun Heoe8e06192006-04-01 01:38:18 +09002268 dev = &ap->device[i];
Linus Torvalds1da177e2005-04-16 15:20:36 -07002269
Tejun Heo02670bf2006-07-03 16:07:26 +09002270 /* don't udpate suspended devices' xfer mode */
2271 if (!ata_dev_ready(dev))
Tejun Heo83206a22006-03-24 15:25:31 +09002272 continue;
2273
Tejun Heo3373efd2006-05-15 20:57:53 +09002274 rc = ata_dev_set_mode(dev);
Tejun Heo5bbc53f2006-04-01 01:38:17 +09002275 if (rc)
Tejun Heoe82cbdb2006-04-01 01:38:18 +09002276 goto out;
Tejun Heo83206a22006-03-24 15:25:31 +09002277 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002278
Tejun Heoe8e06192006-04-01 01:38:18 +09002279 /* Record simplex status. If we selected DMA then the other
2280 * host channels are not permitted to do so.
Alan Cox5444a6f2006-03-27 18:58:20 +01002281 */
Jeff Garzikcca39742006-08-24 03:19:22 -04002282 if (used_dma && (ap->host->flags & ATA_HOST_SIMPLEX))
2283 ap->host->simplex_claimed = 1;
Alan Cox5444a6f2006-03-27 18:58:20 +01002284
Tejun Heoe8e06192006-04-01 01:38:18 +09002285 /* step5: chip specific finalisation */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002286 if (ap->ops->post_set_mode)
2287 ap->ops->post_set_mode(ap);
2288
Tejun Heoe82cbdb2006-04-01 01:38:18 +09002289 out:
2290 if (rc)
2291 *r_failed_dev = dev;
2292 return rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002293}
2294
2295/**
Jeff Garzik1fdffbc2006-02-09 05:15:27 -05002296 * ata_tf_to_host - issue ATA taskfile to host controller
2297 * @ap: port to which command is being issued
2298 * @tf: ATA taskfile register set
2299 *
2300 * Issues ATA taskfile register set to ATA host controller,
2301 * with proper synchronization with interrupt handler and
2302 * other threads.
2303 *
2304 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04002305 * spin_lock_irqsave(host lock)
Jeff Garzik1fdffbc2006-02-09 05:15:27 -05002306 */
2307
2308static inline void ata_tf_to_host(struct ata_port *ap,
2309 const struct ata_taskfile *tf)
2310{
2311 ap->ops->tf_load(ap, tf);
2312 ap->ops->exec_command(ap, tf);
2313}
2314
2315/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07002316 * ata_busy_sleep - sleep until BSY clears, or timeout
2317 * @ap: port containing status register to be polled
2318 * @tmout_pat: impatience timeout
2319 * @tmout: overall timeout
2320 *
Jeff Garzik780a87f2005-05-30 15:41:05 -04002321 * Sleep until ATA Status register bit BSY clears,
2322 * or a timeout occurs.
2323 *
2324 * LOCKING: None.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002325 */
2326
Tejun Heo6f8b9952006-01-24 17:05:21 +09002327unsigned int ata_busy_sleep (struct ata_port *ap,
2328 unsigned long tmout_pat, unsigned long tmout)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002329{
2330 unsigned long timer_start, timeout;
2331 u8 status;
2332
2333 status = ata_busy_wait(ap, ATA_BUSY, 300);
2334 timer_start = jiffies;
2335 timeout = timer_start + tmout_pat;
2336 while ((status & ATA_BUSY) && (time_before(jiffies, timeout))) {
2337 msleep(50);
2338 status = ata_busy_wait(ap, ATA_BUSY, 3);
2339 }
2340
2341 if (status & ATA_BUSY)
Tejun Heof15a1da2006-05-15 20:57:56 +09002342 ata_port_printk(ap, KERN_WARNING,
Jeff Garzik35aa7a42006-09-28 06:50:24 -04002343 "port is slow to respond, please be patient "
2344 "(Status 0x%x)\n", status);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002345
2346 timeout = timer_start + tmout;
2347 while ((status & ATA_BUSY) && (time_before(jiffies, timeout))) {
2348 msleep(50);
2349 status = ata_chk_status(ap);
2350 }
2351
2352 if (status & ATA_BUSY) {
Tejun Heof15a1da2006-05-15 20:57:56 +09002353 ata_port_printk(ap, KERN_ERR, "port failed to respond "
Jeff Garzik35aa7a42006-09-28 06:50:24 -04002354 "(%lu secs, Status 0x%x)\n",
2355 tmout / HZ, status);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002356 return 1;
2357 }
2358
2359 return 0;
2360}
2361
2362static void ata_bus_post_reset(struct ata_port *ap, unsigned int devmask)
2363{
2364 struct ata_ioports *ioaddr = &ap->ioaddr;
2365 unsigned int dev0 = devmask & (1 << 0);
2366 unsigned int dev1 = devmask & (1 << 1);
2367 unsigned long timeout;
2368
2369 /* if device 0 was found in ata_devchk, wait for its
2370 * BSY bit to clear
2371 */
2372 if (dev0)
2373 ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT);
2374
2375 /* if device 1 was found in ata_devchk, wait for
2376 * register access, then wait for BSY to clear
2377 */
2378 timeout = jiffies + ATA_TMOUT_BOOT;
2379 while (dev1) {
2380 u8 nsect, lbal;
2381
2382 ap->ops->dev_select(ap, 1);
2383 if (ap->flags & ATA_FLAG_MMIO) {
2384 nsect = readb((void __iomem *) ioaddr->nsect_addr);
2385 lbal = readb((void __iomem *) ioaddr->lbal_addr);
2386 } else {
2387 nsect = inb(ioaddr->nsect_addr);
2388 lbal = inb(ioaddr->lbal_addr);
2389 }
2390 if ((nsect == 1) && (lbal == 1))
2391 break;
2392 if (time_after(jiffies, timeout)) {
2393 dev1 = 0;
2394 break;
2395 }
2396 msleep(50); /* give drive a breather */
2397 }
2398 if (dev1)
2399 ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT);
2400
2401 /* is all this really necessary? */
2402 ap->ops->dev_select(ap, 0);
2403 if (dev1)
2404 ap->ops->dev_select(ap, 1);
2405 if (dev0)
2406 ap->ops->dev_select(ap, 0);
2407}
2408
Linus Torvalds1da177e2005-04-16 15:20:36 -07002409static unsigned int ata_bus_softreset(struct ata_port *ap,
2410 unsigned int devmask)
2411{
2412 struct ata_ioports *ioaddr = &ap->ioaddr;
2413
2414 DPRINTK("ata%u: bus reset via SRST\n", ap->id);
2415
2416 /* software reset. causes dev0 to be selected */
2417 if (ap->flags & ATA_FLAG_MMIO) {
2418 writeb(ap->ctl, (void __iomem *) ioaddr->ctl_addr);
2419 udelay(20); /* FIXME: flush */
2420 writeb(ap->ctl | ATA_SRST, (void __iomem *) ioaddr->ctl_addr);
2421 udelay(20); /* FIXME: flush */
2422 writeb(ap->ctl, (void __iomem *) ioaddr->ctl_addr);
2423 } else {
2424 outb(ap->ctl, ioaddr->ctl_addr);
2425 udelay(10);
2426 outb(ap->ctl | ATA_SRST, ioaddr->ctl_addr);
2427 udelay(10);
2428 outb(ap->ctl, ioaddr->ctl_addr);
2429 }
2430
2431 /* spec mandates ">= 2ms" before checking status.
2432 * We wait 150ms, because that was the magic delay used for
2433 * ATAPI devices in Hale Landis's ATADRVR, for the period of time
2434 * between when the ATA command register is written, and then
2435 * status is checked. Because waiting for "a while" before
2436 * checking status is fine, post SRST, we perform this magic
2437 * delay here as well.
Alan Cox09c7ad72006-03-22 15:52:40 +00002438 *
2439 * Old drivers/ide uses the 2mS rule and then waits for ready
Linus Torvalds1da177e2005-04-16 15:20:36 -07002440 */
2441 msleep(150);
2442
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05002443 /* Before we perform post reset processing we want to see if
Tejun Heo298a41c2006-03-25 02:58:13 +09002444 * the bus shows 0xFF because the odd clown forgets the D7
2445 * pulldown resistor.
2446 */
Tejun Heo987d2f02006-04-11 22:16:45 +09002447 if (ata_check_status(ap) == 0xFF) {
Tejun Heof15a1da2006-05-15 20:57:56 +09002448 ata_port_printk(ap, KERN_ERR, "SRST failed (status 0xFF)\n");
Tejun Heo298a41c2006-03-25 02:58:13 +09002449 return AC_ERR_OTHER;
Tejun Heo987d2f02006-04-11 22:16:45 +09002450 }
Alan Cox09c7ad72006-03-22 15:52:40 +00002451
Linus Torvalds1da177e2005-04-16 15:20:36 -07002452 ata_bus_post_reset(ap, devmask);
2453
2454 return 0;
2455}
2456
2457/**
2458 * ata_bus_reset - reset host port and associated ATA channel
2459 * @ap: port to reset
2460 *
2461 * This is typically the first time we actually start issuing
2462 * commands to the ATA channel. We wait for BSY to clear, then
2463 * issue EXECUTE DEVICE DIAGNOSTIC command, polling for its
2464 * result. Determine what devices, if any, are on the channel
2465 * by looking at the device 0/1 error register. Look at the signature
2466 * stored in each device's taskfile registers, to determine if
2467 * the device is ATA or ATAPI.
2468 *
2469 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04002470 * PCI/etc. bus probe sem.
Jeff Garzikcca39742006-08-24 03:19:22 -04002471 * Obtains host lock.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002472 *
2473 * SIDE EFFECTS:
Tejun Heo198e0fe2006-04-02 18:51:52 +09002474 * Sets ATA_FLAG_DISABLED if bus reset fails.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002475 */
2476
2477void ata_bus_reset(struct ata_port *ap)
2478{
2479 struct ata_ioports *ioaddr = &ap->ioaddr;
2480 unsigned int slave_possible = ap->flags & ATA_FLAG_SLAVE_POSS;
2481 u8 err;
Tejun Heoaec5c3c2006-03-25 01:33:34 +09002482 unsigned int dev0, dev1 = 0, devmask = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002483
2484 DPRINTK("ENTER, host %u, port %u\n", ap->id, ap->port_no);
2485
2486 /* determine if device 0/1 are present */
2487 if (ap->flags & ATA_FLAG_SATA_RESET)
2488 dev0 = 1;
2489 else {
2490 dev0 = ata_devchk(ap, 0);
2491 if (slave_possible)
2492 dev1 = ata_devchk(ap, 1);
2493 }
2494
2495 if (dev0)
2496 devmask |= (1 << 0);
2497 if (dev1)
2498 devmask |= (1 << 1);
2499
2500 /* select device 0 again */
2501 ap->ops->dev_select(ap, 0);
2502
2503 /* issue bus reset */
2504 if (ap->flags & ATA_FLAG_SRST)
Tejun Heoaec5c3c2006-03-25 01:33:34 +09002505 if (ata_bus_softreset(ap, devmask))
2506 goto err_out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002507
2508 /*
2509 * determine by signature whether we have ATA or ATAPI devices
2510 */
Tejun Heob4dc7622006-01-24 17:05:22 +09002511 ap->device[0].class = ata_dev_try_classify(ap, 0, &err);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002512 if ((slave_possible) && (err != 0x81))
Tejun Heob4dc7622006-01-24 17:05:22 +09002513 ap->device[1].class = ata_dev_try_classify(ap, 1, &err);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002514
2515 /* re-enable interrupts */
2516 if (ap->ioaddr.ctl_addr) /* FIXME: hack. create a hook instead */
2517 ata_irq_on(ap);
2518
2519 /* is double-select really necessary? */
2520 if (ap->device[1].class != ATA_DEV_NONE)
2521 ap->ops->dev_select(ap, 1);
2522 if (ap->device[0].class != ATA_DEV_NONE)
2523 ap->ops->dev_select(ap, 0);
2524
2525 /* if no devices were detected, disable this port */
2526 if ((ap->device[0].class == ATA_DEV_NONE) &&
2527 (ap->device[1].class == ATA_DEV_NONE))
2528 goto err_out;
2529
2530 if (ap->flags & (ATA_FLAG_SATA_RESET | ATA_FLAG_SRST)) {
2531 /* set up device control for ATA_FLAG_SATA_RESET */
2532 if (ap->flags & ATA_FLAG_MMIO)
2533 writeb(ap->ctl, (void __iomem *) ioaddr->ctl_addr);
2534 else
2535 outb(ap->ctl, ioaddr->ctl_addr);
2536 }
2537
2538 DPRINTK("EXIT\n");
2539 return;
2540
2541err_out:
Tejun Heof15a1da2006-05-15 20:57:56 +09002542 ata_port_printk(ap, KERN_ERR, "disabling port\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07002543 ap->ops->port_disable(ap);
2544
2545 DPRINTK("EXIT\n");
2546}
2547
Tejun Heod7bb4cc2006-05-31 18:27:46 +09002548/**
2549 * sata_phy_debounce - debounce SATA phy status
2550 * @ap: ATA port to debounce SATA phy status for
2551 * @params: timing parameters { interval, duratinon, timeout } in msec
2552 *
2553 * Make sure SStatus of @ap reaches stable state, determined by
2554 * holding the same value where DET is not 1 for @duration polled
2555 * every @interval, before @timeout. Timeout constraints the
2556 * beginning of the stable state. Because, after hot unplugging,
2557 * DET gets stuck at 1 on some controllers, this functions waits
2558 * until timeout then returns 0 if DET is stable at 1.
2559 *
2560 * LOCKING:
2561 * Kernel thread context (may sleep)
2562 *
2563 * RETURNS:
2564 * 0 on success, -errno on failure.
2565 */
2566int sata_phy_debounce(struct ata_port *ap, const unsigned long *params)
Tejun Heo7a7921e2006-02-02 18:20:00 +09002567{
Tejun Heod7bb4cc2006-05-31 18:27:46 +09002568 unsigned long interval_msec = params[0];
2569 unsigned long duration = params[1] * HZ / 1000;
2570 unsigned long timeout = jiffies + params[2] * HZ / 1000;
2571 unsigned long last_jiffies;
2572 u32 last, cur;
2573 int rc;
2574
2575 if ((rc = sata_scr_read(ap, SCR_STATUS, &cur)))
2576 return rc;
2577 cur &= 0xf;
2578
2579 last = cur;
2580 last_jiffies = jiffies;
2581
2582 while (1) {
2583 msleep(interval_msec);
2584 if ((rc = sata_scr_read(ap, SCR_STATUS, &cur)))
2585 return rc;
2586 cur &= 0xf;
2587
2588 /* DET stable? */
2589 if (cur == last) {
2590 if (cur == 1 && time_before(jiffies, timeout))
2591 continue;
2592 if (time_after(jiffies, last_jiffies + duration))
2593 return 0;
2594 continue;
2595 }
2596
2597 /* unstable, start over */
2598 last = cur;
2599 last_jiffies = jiffies;
2600
2601 /* check timeout */
2602 if (time_after(jiffies, timeout))
2603 return -EBUSY;
2604 }
2605}
2606
2607/**
2608 * sata_phy_resume - resume SATA phy
2609 * @ap: ATA port to resume SATA phy for
2610 * @params: timing parameters { interval, duratinon, timeout } in msec
2611 *
2612 * Resume SATA phy of @ap and debounce it.
2613 *
2614 * LOCKING:
2615 * Kernel thread context (may sleep)
2616 *
2617 * RETURNS:
2618 * 0 on success, -errno on failure.
2619 */
2620int sata_phy_resume(struct ata_port *ap, const unsigned long *params)
2621{
2622 u32 scontrol;
Tejun Heo81952c52006-05-15 20:57:47 +09002623 int rc;
Tejun Heo7a7921e2006-02-02 18:20:00 +09002624
Tejun Heo81952c52006-05-15 20:57:47 +09002625 if ((rc = sata_scr_read(ap, SCR_CONTROL, &scontrol)))
2626 return rc;
2627
Tejun Heo852ee162006-04-01 01:38:18 +09002628 scontrol = (scontrol & 0x0f0) | 0x300;
Tejun Heo81952c52006-05-15 20:57:47 +09002629
2630 if ((rc = sata_scr_write(ap, SCR_CONTROL, scontrol)))
2631 return rc;
Tejun Heo7a7921e2006-02-02 18:20:00 +09002632
Tejun Heod7bb4cc2006-05-31 18:27:46 +09002633 /* Some PHYs react badly if SStatus is pounded immediately
2634 * after resuming. Delay 200ms before debouncing.
2635 */
2636 msleep(200);
Tejun Heo7a7921e2006-02-02 18:20:00 +09002637
Tejun Heod7bb4cc2006-05-31 18:27:46 +09002638 return sata_phy_debounce(ap, params);
Tejun Heo7a7921e2006-02-02 18:20:00 +09002639}
2640
Tejun Heof5914a42006-05-31 18:27:48 +09002641static void ata_wait_spinup(struct ata_port *ap)
2642{
2643 struct ata_eh_context *ehc = &ap->eh_context;
2644 unsigned long end, secs;
2645 int rc;
2646
2647 /* first, debounce phy if SATA */
2648 if (ap->cbl == ATA_CBL_SATA) {
Tejun Heoe9c83912006-07-03 16:07:26 +09002649 rc = sata_phy_debounce(ap, sata_deb_timing_hotplug);
Tejun Heof5914a42006-05-31 18:27:48 +09002650
2651 /* if debounced successfully and offline, no need to wait */
2652 if ((rc == 0 || rc == -EOPNOTSUPP) && ata_port_offline(ap))
2653 return;
2654 }
2655
2656 /* okay, let's give the drive time to spin up */
2657 end = ehc->i.hotplug_timestamp + ATA_SPINUP_WAIT * HZ / 1000;
2658 secs = ((end - jiffies) + HZ - 1) / HZ;
2659
2660 if (time_after(jiffies, end))
2661 return;
2662
2663 if (secs > 5)
2664 ata_port_printk(ap, KERN_INFO, "waiting for device to spin up "
2665 "(%lu secs)\n", secs);
2666
2667 schedule_timeout_uninterruptible(end - jiffies);
2668}
2669
2670/**
2671 * ata_std_prereset - prepare for reset
2672 * @ap: ATA port to be reset
2673 *
2674 * @ap is about to be reset. Initialize it.
2675 *
2676 * LOCKING:
2677 * Kernel thread context (may sleep)
2678 *
2679 * RETURNS:
2680 * 0 on success, -errno otherwise.
2681 */
2682int ata_std_prereset(struct ata_port *ap)
2683{
2684 struct ata_eh_context *ehc = &ap->eh_context;
Tejun Heoe9c83912006-07-03 16:07:26 +09002685 const unsigned long *timing = sata_ehc_deb_timing(ehc);
Tejun Heof5914a42006-05-31 18:27:48 +09002686 int rc;
2687
Tejun Heo28324302006-07-03 16:07:26 +09002688 /* handle link resume & hotplug spinup */
2689 if ((ehc->i.flags & ATA_EHI_RESUME_LINK) &&
2690 (ap->flags & ATA_FLAG_HRST_TO_RESUME))
2691 ehc->i.action |= ATA_EH_HARDRESET;
2692
2693 if ((ehc->i.flags & ATA_EHI_HOTPLUGGED) &&
2694 (ap->flags & ATA_FLAG_SKIP_D2H_BSY))
2695 ata_wait_spinup(ap);
Tejun Heof5914a42006-05-31 18:27:48 +09002696
2697 /* if we're about to do hardreset, nothing more to do */
2698 if (ehc->i.action & ATA_EH_HARDRESET)
2699 return 0;
2700
2701 /* if SATA, resume phy */
2702 if (ap->cbl == ATA_CBL_SATA) {
Tejun Heof5914a42006-05-31 18:27:48 +09002703 rc = sata_phy_resume(ap, timing);
2704 if (rc && rc != -EOPNOTSUPP) {
2705 /* phy resume failed */
2706 ata_port_printk(ap, KERN_WARNING, "failed to resume "
2707 "link for reset (errno=%d)\n", rc);
2708 return rc;
2709 }
2710 }
2711
2712 /* Wait for !BSY if the controller can wait for the first D2H
2713 * Reg FIS and we don't know that no device is attached.
2714 */
2715 if (!(ap->flags & ATA_FLAG_SKIP_D2H_BSY) && !ata_port_offline(ap))
2716 ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT);
2717
2718 return 0;
2719}
2720
Tejun Heoc2bd5802006-01-24 17:05:22 +09002721/**
2722 * ata_std_softreset - reset host port via ATA SRST
2723 * @ap: port to reset
Tejun Heoc2bd5802006-01-24 17:05:22 +09002724 * @classes: resulting classes of attached devices
2725 *
Tejun Heo52783c52006-05-31 18:28:22 +09002726 * Reset host port using ATA SRST.
Tejun Heoc2bd5802006-01-24 17:05:22 +09002727 *
2728 * LOCKING:
2729 * Kernel thread context (may sleep)
2730 *
2731 * RETURNS:
2732 * 0 on success, -errno otherwise.
2733 */
Tejun Heo2bf2cb22006-04-11 22:16:45 +09002734int ata_std_softreset(struct ata_port *ap, unsigned int *classes)
Tejun Heoc2bd5802006-01-24 17:05:22 +09002735{
2736 unsigned int slave_possible = ap->flags & ATA_FLAG_SLAVE_POSS;
2737 unsigned int devmask = 0, err_mask;
2738 u8 err;
2739
2740 DPRINTK("ENTER\n");
2741
Tejun Heo81952c52006-05-15 20:57:47 +09002742 if (ata_port_offline(ap)) {
Tejun Heo3a397462006-02-10 23:58:48 +09002743 classes[0] = ATA_DEV_NONE;
2744 goto out;
2745 }
2746
Tejun Heoc2bd5802006-01-24 17:05:22 +09002747 /* determine if device 0/1 are present */
2748 if (ata_devchk(ap, 0))
2749 devmask |= (1 << 0);
2750 if (slave_possible && ata_devchk(ap, 1))
2751 devmask |= (1 << 1);
2752
Tejun Heoc2bd5802006-01-24 17:05:22 +09002753 /* select device 0 again */
2754 ap->ops->dev_select(ap, 0);
2755
2756 /* issue bus reset */
2757 DPRINTK("about to softreset, devmask=%x\n", devmask);
2758 err_mask = ata_bus_softreset(ap, devmask);
2759 if (err_mask) {
Tejun Heof15a1da2006-05-15 20:57:56 +09002760 ata_port_printk(ap, KERN_ERR, "SRST failed (err_mask=0x%x)\n",
2761 err_mask);
Tejun Heoc2bd5802006-01-24 17:05:22 +09002762 return -EIO;
2763 }
2764
2765 /* determine by signature whether we have ATA or ATAPI devices */
2766 classes[0] = ata_dev_try_classify(ap, 0, &err);
2767 if (slave_possible && err != 0x81)
2768 classes[1] = ata_dev_try_classify(ap, 1, &err);
2769
Tejun Heo3a397462006-02-10 23:58:48 +09002770 out:
Tejun Heoc2bd5802006-01-24 17:05:22 +09002771 DPRINTK("EXIT, classes[0]=%u [1]=%u\n", classes[0], classes[1]);
2772 return 0;
2773}
2774
2775/**
2776 * sata_std_hardreset - reset host port via SATA phy reset
2777 * @ap: port to reset
Tejun Heoc2bd5802006-01-24 17:05:22 +09002778 * @class: resulting class of attached device
2779 *
2780 * SATA phy-reset host port using DET bits of SControl register.
Tejun Heoc2bd5802006-01-24 17:05:22 +09002781 *
2782 * LOCKING:
2783 * Kernel thread context (may sleep)
2784 *
2785 * RETURNS:
2786 * 0 on success, -errno otherwise.
2787 */
Tejun Heo2bf2cb22006-04-11 22:16:45 +09002788int sata_std_hardreset(struct ata_port *ap, unsigned int *class)
Tejun Heoc2bd5802006-01-24 17:05:22 +09002789{
Tejun Heoe9c83912006-07-03 16:07:26 +09002790 struct ata_eh_context *ehc = &ap->eh_context;
2791 const unsigned long *timing = sata_ehc_deb_timing(ehc);
Tejun Heo852ee162006-04-01 01:38:18 +09002792 u32 scontrol;
Tejun Heo81952c52006-05-15 20:57:47 +09002793 int rc;
Tejun Heo852ee162006-04-01 01:38:18 +09002794
Tejun Heoc2bd5802006-01-24 17:05:22 +09002795 DPRINTK("ENTER\n");
2796
Tejun Heo3c567b72006-05-15 20:57:23 +09002797 if (sata_set_spd_needed(ap)) {
Tejun Heo1c3fae42006-04-02 20:53:28 +09002798 /* SATA spec says nothing about how to reconfigure
2799 * spd. To be on the safe side, turn off phy during
2800 * reconfiguration. This works for at least ICH7 AHCI
2801 * and Sil3124.
2802 */
Tejun Heo81952c52006-05-15 20:57:47 +09002803 if ((rc = sata_scr_read(ap, SCR_CONTROL, &scontrol)))
2804 return rc;
2805
Martin Hicksa34b6fc2006-07-05 15:06:13 -04002806 scontrol = (scontrol & 0x0f0) | 0x304;
Tejun Heo81952c52006-05-15 20:57:47 +09002807
2808 if ((rc = sata_scr_write(ap, SCR_CONTROL, scontrol)))
2809 return rc;
Tejun Heo1c3fae42006-04-02 20:53:28 +09002810
Tejun Heo3c567b72006-05-15 20:57:23 +09002811 sata_set_spd(ap);
Tejun Heo1c3fae42006-04-02 20:53:28 +09002812 }
2813
2814 /* issue phy wake/reset */
Tejun Heo81952c52006-05-15 20:57:47 +09002815 if ((rc = sata_scr_read(ap, SCR_CONTROL, &scontrol)))
2816 return rc;
2817
Tejun Heo852ee162006-04-01 01:38:18 +09002818 scontrol = (scontrol & 0x0f0) | 0x301;
Tejun Heo81952c52006-05-15 20:57:47 +09002819
2820 if ((rc = sata_scr_write_flush(ap, SCR_CONTROL, scontrol)))
2821 return rc;
Tejun Heoc2bd5802006-01-24 17:05:22 +09002822
Tejun Heo1c3fae42006-04-02 20:53:28 +09002823 /* Couldn't find anything in SATA I/II specs, but AHCI-1.1
Tejun Heoc2bd5802006-01-24 17:05:22 +09002824 * 10.4.2 says at least 1 ms.
2825 */
2826 msleep(1);
2827
Tejun Heo1c3fae42006-04-02 20:53:28 +09002828 /* bring phy back */
Tejun Heoe9c83912006-07-03 16:07:26 +09002829 sata_phy_resume(ap, timing);
Tejun Heoc2bd5802006-01-24 17:05:22 +09002830
Tejun Heoc2bd5802006-01-24 17:05:22 +09002831 /* TODO: phy layer with polling, timeouts, etc. */
Tejun Heo81952c52006-05-15 20:57:47 +09002832 if (ata_port_offline(ap)) {
Tejun Heoc2bd5802006-01-24 17:05:22 +09002833 *class = ATA_DEV_NONE;
2834 DPRINTK("EXIT, link offline\n");
2835 return 0;
2836 }
2837
2838 if (ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT)) {
Tejun Heof15a1da2006-05-15 20:57:56 +09002839 ata_port_printk(ap, KERN_ERR,
2840 "COMRESET failed (device not ready)\n");
Tejun Heoc2bd5802006-01-24 17:05:22 +09002841 return -EIO;
2842 }
2843
Tejun Heo3a397462006-02-10 23:58:48 +09002844 ap->ops->dev_select(ap, 0); /* probably unnecessary */
2845
Tejun Heoc2bd5802006-01-24 17:05:22 +09002846 *class = ata_dev_try_classify(ap, 0, NULL);
2847
2848 DPRINTK("EXIT, class=%u\n", *class);
2849 return 0;
2850}
2851
2852/**
2853 * ata_std_postreset - standard postreset callback
2854 * @ap: the target ata_port
2855 * @classes: classes of attached devices
2856 *
2857 * This function is invoked after a successful reset. Note that
2858 * the device might have been reset more than once using
2859 * different reset methods before postreset is invoked.
Tejun Heoc2bd5802006-01-24 17:05:22 +09002860 *
Tejun Heoc2bd5802006-01-24 17:05:22 +09002861 * LOCKING:
2862 * Kernel thread context (may sleep)
2863 */
2864void ata_std_postreset(struct ata_port *ap, unsigned int *classes)
2865{
Tejun Heodc2b3512006-05-15 20:58:00 +09002866 u32 serror;
2867
Tejun Heoc2bd5802006-01-24 17:05:22 +09002868 DPRINTK("ENTER\n");
2869
Tejun Heoc2bd5802006-01-24 17:05:22 +09002870 /* print link status */
Tejun Heo81952c52006-05-15 20:57:47 +09002871 sata_print_link_status(ap);
Tejun Heoc2bd5802006-01-24 17:05:22 +09002872
Tejun Heodc2b3512006-05-15 20:58:00 +09002873 /* clear SError */
2874 if (sata_scr_read(ap, SCR_ERROR, &serror) == 0)
2875 sata_scr_write(ap, SCR_ERROR, serror);
2876
Tejun Heo3a397462006-02-10 23:58:48 +09002877 /* re-enable interrupts */
Tejun Heoe3180492006-05-15 20:58:09 +09002878 if (!ap->ops->error_handler) {
2879 /* FIXME: hack. create a hook instead */
2880 if (ap->ioaddr.ctl_addr)
2881 ata_irq_on(ap);
2882 }
Tejun Heoc2bd5802006-01-24 17:05:22 +09002883
2884 /* is double-select really necessary? */
2885 if (classes[0] != ATA_DEV_NONE)
2886 ap->ops->dev_select(ap, 1);
2887 if (classes[1] != ATA_DEV_NONE)
2888 ap->ops->dev_select(ap, 0);
2889
Tejun Heo3a397462006-02-10 23:58:48 +09002890 /* bail out if no device is present */
2891 if (classes[0] == ATA_DEV_NONE && classes[1] == ATA_DEV_NONE) {
2892 DPRINTK("EXIT, no device\n");
2893 return;
2894 }
2895
2896 /* set up device control */
2897 if (ap->ioaddr.ctl_addr) {
2898 if (ap->flags & ATA_FLAG_MMIO)
2899 writeb(ap->ctl, (void __iomem *) ap->ioaddr.ctl_addr);
2900 else
2901 outb(ap->ctl, ap->ioaddr.ctl_addr);
2902 }
Tejun Heoc2bd5802006-01-24 17:05:22 +09002903
2904 DPRINTK("EXIT\n");
2905}
2906
Tejun Heoa62c0fc2006-01-24 17:05:22 +09002907/**
Tejun Heo623a3122006-03-05 17:55:58 +09002908 * ata_dev_same_device - Determine whether new ID matches configured device
Tejun Heo623a3122006-03-05 17:55:58 +09002909 * @dev: device to compare against
2910 * @new_class: class of the new device
2911 * @new_id: IDENTIFY page of the new device
2912 *
2913 * Compare @new_class and @new_id against @dev and determine
2914 * whether @dev is the device indicated by @new_class and
2915 * @new_id.
2916 *
2917 * LOCKING:
2918 * None.
2919 *
2920 * RETURNS:
2921 * 1 if @dev matches @new_class and @new_id, 0 otherwise.
2922 */
Tejun Heo3373efd2006-05-15 20:57:53 +09002923static int ata_dev_same_device(struct ata_device *dev, unsigned int new_class,
2924 const u16 *new_id)
Tejun Heo623a3122006-03-05 17:55:58 +09002925{
2926 const u16 *old_id = dev->id;
2927 unsigned char model[2][41], serial[2][21];
2928 u64 new_n_sectors;
2929
2930 if (dev->class != new_class) {
Tejun Heof15a1da2006-05-15 20:57:56 +09002931 ata_dev_printk(dev, KERN_INFO, "class mismatch %d != %d\n",
2932 dev->class, new_class);
Tejun Heo623a3122006-03-05 17:55:58 +09002933 return 0;
2934 }
2935
2936 ata_id_c_string(old_id, model[0], ATA_ID_PROD_OFS, sizeof(model[0]));
2937 ata_id_c_string(new_id, model[1], ATA_ID_PROD_OFS, sizeof(model[1]));
2938 ata_id_c_string(old_id, serial[0], ATA_ID_SERNO_OFS, sizeof(serial[0]));
2939 ata_id_c_string(new_id, serial[1], ATA_ID_SERNO_OFS, sizeof(serial[1]));
2940 new_n_sectors = ata_id_n_sectors(new_id);
2941
2942 if (strcmp(model[0], model[1])) {
Tejun Heof15a1da2006-05-15 20:57:56 +09002943 ata_dev_printk(dev, KERN_INFO, "model number mismatch "
2944 "'%s' != '%s'\n", model[0], model[1]);
Tejun Heo623a3122006-03-05 17:55:58 +09002945 return 0;
2946 }
2947
2948 if (strcmp(serial[0], serial[1])) {
Tejun Heof15a1da2006-05-15 20:57:56 +09002949 ata_dev_printk(dev, KERN_INFO, "serial number mismatch "
2950 "'%s' != '%s'\n", serial[0], serial[1]);
Tejun Heo623a3122006-03-05 17:55:58 +09002951 return 0;
2952 }
2953
2954 if (dev->class == ATA_DEV_ATA && dev->n_sectors != new_n_sectors) {
Tejun Heof15a1da2006-05-15 20:57:56 +09002955 ata_dev_printk(dev, KERN_INFO, "n_sectors mismatch "
2956 "%llu != %llu\n",
2957 (unsigned long long)dev->n_sectors,
2958 (unsigned long long)new_n_sectors);
Tejun Heo623a3122006-03-05 17:55:58 +09002959 return 0;
2960 }
2961
2962 return 1;
2963}
2964
2965/**
2966 * ata_dev_revalidate - Revalidate ATA device
Tejun Heo623a3122006-03-05 17:55:58 +09002967 * @dev: device to revalidate
2968 * @post_reset: is this revalidation after reset?
2969 *
2970 * Re-read IDENTIFY page and make sure @dev is still attached to
2971 * the port.
2972 *
2973 * LOCKING:
2974 * Kernel thread context (may sleep)
2975 *
2976 * RETURNS:
2977 * 0 on success, negative errno otherwise
2978 */
Tejun Heo3373efd2006-05-15 20:57:53 +09002979int ata_dev_revalidate(struct ata_device *dev, int post_reset)
Tejun Heo623a3122006-03-05 17:55:58 +09002980{
Tejun Heo5eb45c02006-04-02 18:51:52 +09002981 unsigned int class = dev->class;
Tejun Heof15a1da2006-05-15 20:57:56 +09002982 u16 *id = (void *)dev->ap->sector_buf;
Tejun Heo623a3122006-03-05 17:55:58 +09002983 int rc;
2984
Tejun Heo5eb45c02006-04-02 18:51:52 +09002985 if (!ata_dev_enabled(dev)) {
2986 rc = -ENODEV;
2987 goto fail;
2988 }
Tejun Heo623a3122006-03-05 17:55:58 +09002989
Tejun Heofe635c72006-05-15 20:57:35 +09002990 /* read ID data */
Tejun Heo3373efd2006-05-15 20:57:53 +09002991 rc = ata_dev_read_id(dev, &class, post_reset, id);
Tejun Heo623a3122006-03-05 17:55:58 +09002992 if (rc)
2993 goto fail;
2994
2995 /* is the device still there? */
Tejun Heo3373efd2006-05-15 20:57:53 +09002996 if (!ata_dev_same_device(dev, class, id)) {
Tejun Heo623a3122006-03-05 17:55:58 +09002997 rc = -ENODEV;
2998 goto fail;
2999 }
3000
Tejun Heofe635c72006-05-15 20:57:35 +09003001 memcpy(dev->id, id, sizeof(id[0]) * ATA_ID_WORDS);
Tejun Heo623a3122006-03-05 17:55:58 +09003002
3003 /* configure device according to the new ID */
Tejun Heo3373efd2006-05-15 20:57:53 +09003004 rc = ata_dev_configure(dev, 0);
Tejun Heo5eb45c02006-04-02 18:51:52 +09003005 if (rc == 0)
3006 return 0;
Tejun Heo623a3122006-03-05 17:55:58 +09003007
3008 fail:
Tejun Heof15a1da2006-05-15 20:57:56 +09003009 ata_dev_printk(dev, KERN_ERR, "revalidation failed (errno=%d)\n", rc);
Tejun Heo623a3122006-03-05 17:55:58 +09003010 return rc;
3011}
3012
Arjan van de Ven98ac62d2005-11-28 10:06:23 +01003013static const char * const ata_dma_blacklist [] = {
Alan Coxf4b15fe2006-03-22 15:54:04 +00003014 "WDC AC11000H", NULL,
3015 "WDC AC22100H", NULL,
3016 "WDC AC32500H", NULL,
3017 "WDC AC33100H", NULL,
3018 "WDC AC31600H", NULL,
3019 "WDC AC32100H", "24.09P07",
3020 "WDC AC23200L", "21.10N21",
3021 "Compaq CRD-8241B", NULL,
3022 "CRD-8400B", NULL,
3023 "CRD-8480B", NULL,
3024 "CRD-8482B", NULL,
3025 "CRD-84", NULL,
3026 "SanDisk SDP3B", NULL,
3027 "SanDisk SDP3B-64", NULL,
3028 "SANYO CD-ROM CRD", NULL,
3029 "HITACHI CDR-8", NULL,
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05003030 "HITACHI CDR-8335", NULL,
Alan Coxf4b15fe2006-03-22 15:54:04 +00003031 "HITACHI CDR-8435", NULL,
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05003032 "Toshiba CD-ROM XM-6202B", NULL,
3033 "TOSHIBA CD-ROM XM-1702BC", NULL,
3034 "CD-532E-A", NULL,
3035 "E-IDE CD-ROM CR-840", NULL,
3036 "CD-ROM Drive/F5A", NULL,
3037 "WPI CDD-820", NULL,
Alan Coxf4b15fe2006-03-22 15:54:04 +00003038 "SAMSUNG CD-ROM SC-148C", NULL,
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05003039 "SAMSUNG CD-ROM SC", NULL,
Alan Coxf4b15fe2006-03-22 15:54:04 +00003040 "SanDisk SDP3B-64", NULL,
3041 "ATAPI CD-ROM DRIVE 40X MAXIMUM",NULL,
3042 "_NEC DV5800A", NULL,
3043 "SAMSUNG CD-ROM SN-124", "N001"
Linus Torvalds1da177e2005-04-16 15:20:36 -07003044};
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05003045
Alan Coxf4b15fe2006-03-22 15:54:04 +00003046static int ata_strim(char *s, size_t len)
3047{
3048 len = strnlen(s, len);
3049
3050 /* ATAPI specifies that empty space is blank-filled; remove blanks */
3051 while ((len > 0) && (s[len - 1] == ' ')) {
3052 len--;
3053 s[len] = 0;
3054 }
3055 return len;
3056}
Linus Torvalds1da177e2005-04-16 15:20:36 -07003057
Jeff Garzik057ace52005-10-22 14:27:05 -04003058static int ata_dma_blacklisted(const struct ata_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003059{
Alan Coxf4b15fe2006-03-22 15:54:04 +00003060 unsigned char model_num[40];
3061 unsigned char model_rev[16];
3062 unsigned int nlen, rlen;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003063 int i;
3064
Albert Lee3a778272006-06-22 13:00:25 +08003065 /* We don't support polling DMA.
3066 * DMA blacklist those ATAPI devices with CDB-intr (and use PIO)
3067 * if the LLDD handles only interrupts in the HSM_ST_LAST state.
3068 */
3069 if ((dev->ap->flags & ATA_FLAG_PIO_POLLING) &&
3070 (dev->flags & ATA_DFLAG_CDB_INTR))
3071 return 1;
3072
Alan Coxf4b15fe2006-03-22 15:54:04 +00003073 ata_id_string(dev->id, model_num, ATA_ID_PROD_OFS,
3074 sizeof(model_num));
3075 ata_id_string(dev->id, model_rev, ATA_ID_FW_REV_OFS,
3076 sizeof(model_rev));
3077 nlen = ata_strim(model_num, sizeof(model_num));
3078 rlen = ata_strim(model_rev, sizeof(model_rev));
Linus Torvalds1da177e2005-04-16 15:20:36 -07003079
Alan Coxf4b15fe2006-03-22 15:54:04 +00003080 for (i = 0; i < ARRAY_SIZE(ata_dma_blacklist); i += 2) {
3081 if (!strncmp(ata_dma_blacklist[i], model_num, nlen)) {
3082 if (ata_dma_blacklist[i+1] == NULL)
3083 return 1;
3084 if (!strncmp(ata_dma_blacklist[i], model_rev, rlen))
3085 return 1;
3086 }
3087 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003088 return 0;
3089}
3090
Tejun Heoa6d5a512006-03-06 04:31:57 +09003091/**
3092 * ata_dev_xfermask - Compute supported xfermask of the given device
Tejun Heoa6d5a512006-03-06 04:31:57 +09003093 * @dev: Device to compute xfermask for
3094 *
Tejun Heoacf356b2006-03-24 14:07:50 +09003095 * Compute supported xfermask of @dev and store it in
3096 * dev->*_mask. This function is responsible for applying all
3097 * known limits including host controller limits, device
3098 * blacklist, etc...
Tejun Heoa6d5a512006-03-06 04:31:57 +09003099 *
3100 * LOCKING:
3101 * None.
Tejun Heoa6d5a512006-03-06 04:31:57 +09003102 */
Tejun Heo3373efd2006-05-15 20:57:53 +09003103static void ata_dev_xfermask(struct ata_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003104{
Tejun Heo3373efd2006-05-15 20:57:53 +09003105 struct ata_port *ap = dev->ap;
Jeff Garzikcca39742006-08-24 03:19:22 -04003106 struct ata_host *host = ap->host;
Tejun Heoa6d5a512006-03-06 04:31:57 +09003107 unsigned long xfer_mask;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003108
Tejun Heo37deecb2006-08-10 16:59:07 +09003109 /* controller modes available */
Tejun Heo565083e2006-04-02 17:54:47 +09003110 xfer_mask = ata_pack_xfermask(ap->pio_mask,
3111 ap->mwdma_mask, ap->udma_mask);
3112
3113 /* Apply cable rule here. Don't apply it early because when
3114 * we handle hot plug the cable type can itself change.
3115 */
3116 if (ap->cbl == ATA_CBL_PATA40)
3117 xfer_mask &= ~(0xF8 << ATA_SHIFT_UDMA);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003118
Tejun Heo37deecb2006-08-10 16:59:07 +09003119 xfer_mask &= ata_pack_xfermask(dev->pio_mask,
3120 dev->mwdma_mask, dev->udma_mask);
3121 xfer_mask &= ata_id_xfermask(dev->id);
Tejun Heo565083e2006-04-02 17:54:47 +09003122
Alan Coxb352e572006-08-10 18:52:12 +01003123 /*
3124 * CFA Advanced TrueIDE timings are not allowed on a shared
3125 * cable
3126 */
3127 if (ata_dev_pair(dev)) {
3128 /* No PIO5 or PIO6 */
3129 xfer_mask &= ~(0x03 << (ATA_SHIFT_PIO + 5));
3130 /* No MWDMA3 or MWDMA 4 */
3131 xfer_mask &= ~(0x03 << (ATA_SHIFT_MWDMA + 3));
3132 }
3133
Tejun Heo37deecb2006-08-10 16:59:07 +09003134 if (ata_dma_blacklisted(dev)) {
3135 xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA);
Tejun Heof15a1da2006-05-15 20:57:56 +09003136 ata_dev_printk(dev, KERN_WARNING,
3137 "device is on DMA blacklist, disabling DMA\n");
Tejun Heo37deecb2006-08-10 16:59:07 +09003138 }
Tejun Heoa6d5a512006-03-06 04:31:57 +09003139
Jeff Garzikcca39742006-08-24 03:19:22 -04003140 if ((host->flags & ATA_HOST_SIMPLEX) && host->simplex_claimed) {
Tejun Heo37deecb2006-08-10 16:59:07 +09003141 xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA);
3142 ata_dev_printk(dev, KERN_WARNING, "simplex DMA is claimed by "
3143 "other device, disabling DMA\n");
Alan Cox5444a6f2006-03-27 18:58:20 +01003144 }
Tejun Heo565083e2006-04-02 17:54:47 +09003145
Alan Cox5444a6f2006-03-27 18:58:20 +01003146 if (ap->ops->mode_filter)
3147 xfer_mask = ap->ops->mode_filter(ap, dev, xfer_mask);
3148
Tejun Heo565083e2006-04-02 17:54:47 +09003149 ata_unpack_xfermask(xfer_mask, &dev->pio_mask,
3150 &dev->mwdma_mask, &dev->udma_mask);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003151}
3152
Linus Torvalds1da177e2005-04-16 15:20:36 -07003153/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07003154 * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command
Linus Torvalds1da177e2005-04-16 15:20:36 -07003155 * @dev: Device to which command will be sent
3156 *
Jeff Garzik780a87f2005-05-30 15:41:05 -04003157 * Issue SET FEATURES - XFER MODE command to device @dev
3158 * on port @ap.
3159 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07003160 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04003161 * PCI/etc. bus probe sem.
Tejun Heo83206a22006-03-24 15:25:31 +09003162 *
3163 * RETURNS:
3164 * 0 on success, AC_ERR_* mask otherwise.
Linus Torvalds1da177e2005-04-16 15:20:36 -07003165 */
3166
Tejun Heo3373efd2006-05-15 20:57:53 +09003167static unsigned int ata_dev_set_xfermode(struct ata_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003168{
Tejun Heoa0123702005-12-13 14:49:31 +09003169 struct ata_taskfile tf;
Tejun Heo83206a22006-03-24 15:25:31 +09003170 unsigned int err_mask;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003171
3172 /* set up set-features taskfile */
3173 DPRINTK("set features - xfer mode\n");
3174
Tejun Heo3373efd2006-05-15 20:57:53 +09003175 ata_tf_init(dev, &tf);
Tejun Heoa0123702005-12-13 14:49:31 +09003176 tf.command = ATA_CMD_SET_FEATURES;
3177 tf.feature = SETFEATURES_XFER;
3178 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
3179 tf.protocol = ATA_PROT_NODATA;
3180 tf.nsect = dev->xfer_mode;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003181
Tejun Heo3373efd2006-05-15 20:57:53 +09003182 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003183
Tejun Heo83206a22006-03-24 15:25:31 +09003184 DPRINTK("EXIT, err_mask=%x\n", err_mask);
3185 return err_mask;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003186}
3187
3188/**
Albert Lee8bf62ec2005-05-12 15:29:42 -04003189 * ata_dev_init_params - Issue INIT DEV PARAMS command
Albert Lee8bf62ec2005-05-12 15:29:42 -04003190 * @dev: Device to which command will be sent
Randy Dunlape2a7f772006-05-18 10:50:18 -07003191 * @heads: Number of heads (taskfile parameter)
3192 * @sectors: Number of sectors (taskfile parameter)
Albert Lee8bf62ec2005-05-12 15:29:42 -04003193 *
3194 * LOCKING:
Tejun Heo6aff8f12006-02-15 18:24:09 +09003195 * Kernel thread context (may sleep)
3196 *
3197 * RETURNS:
3198 * 0 on success, AC_ERR_* mask otherwise.
Albert Lee8bf62ec2005-05-12 15:29:42 -04003199 */
Tejun Heo3373efd2006-05-15 20:57:53 +09003200static unsigned int ata_dev_init_params(struct ata_device *dev,
3201 u16 heads, u16 sectors)
Albert Lee8bf62ec2005-05-12 15:29:42 -04003202{
Tejun Heoa0123702005-12-13 14:49:31 +09003203 struct ata_taskfile tf;
Tejun Heo6aff8f12006-02-15 18:24:09 +09003204 unsigned int err_mask;
Albert Lee8bf62ec2005-05-12 15:29:42 -04003205
3206 /* Number of sectors per track 1-255. Number of heads 1-16 */
3207 if (sectors < 1 || sectors > 255 || heads < 1 || heads > 16)
Albert Lee00b6f5e2006-03-27 16:39:18 +08003208 return AC_ERR_INVALID;
Albert Lee8bf62ec2005-05-12 15:29:42 -04003209
3210 /* set up init dev params taskfile */
3211 DPRINTK("init dev params \n");
3212
Tejun Heo3373efd2006-05-15 20:57:53 +09003213 ata_tf_init(dev, &tf);
Tejun Heoa0123702005-12-13 14:49:31 +09003214 tf.command = ATA_CMD_INIT_DEV_PARAMS;
3215 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
3216 tf.protocol = ATA_PROT_NODATA;
3217 tf.nsect = sectors;
3218 tf.device |= (heads - 1) & 0x0f; /* max head = num. of heads - 1 */
Albert Lee8bf62ec2005-05-12 15:29:42 -04003219
Tejun Heo3373efd2006-05-15 20:57:53 +09003220 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0);
Albert Lee8bf62ec2005-05-12 15:29:42 -04003221
Tejun Heo6aff8f12006-02-15 18:24:09 +09003222 DPRINTK("EXIT, err_mask=%x\n", err_mask);
3223 return err_mask;
Albert Lee8bf62ec2005-05-12 15:29:42 -04003224}
3225
3226/**
Jeff Garzik0cba6322005-05-30 19:49:12 -04003227 * ata_sg_clean - Unmap DMA memory associated with command
3228 * @qc: Command containing DMA memory to be released
3229 *
3230 * Unmap all mapped DMA memory associated with this command.
Linus Torvalds1da177e2005-04-16 15:20:36 -07003231 *
3232 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04003233 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003234 */
3235
3236static void ata_sg_clean(struct ata_queued_cmd *qc)
3237{
3238 struct ata_port *ap = qc->ap;
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003239 struct scatterlist *sg = qc->__sg;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003240 int dir = qc->dma_dir;
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003241 void *pad_buf = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003242
Tejun Heoa4631472006-02-11 19:11:13 +09003243 WARN_ON(!(qc->flags & ATA_QCFLAG_DMAMAP));
3244 WARN_ON(sg == NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003245
3246 if (qc->flags & ATA_QCFLAG_SINGLE)
Jeff Garzikf1318832006-02-20 16:55:56 -05003247 WARN_ON(qc->n_elem > 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003248
Jeff Garzik2c13b7c2005-11-14 14:14:16 -05003249 VPRINTK("unmapping %u sg elements\n", qc->n_elem);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003250
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003251 /* if we padded the buffer out to 32-bit bound, and data
3252 * xfer direction is from-device, we must copy from the
3253 * pad buffer back into the supplied buffer
3254 */
3255 if (qc->pad_len && !(qc->tf.flags & ATA_TFLAG_WRITE))
3256 pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ);
3257
3258 if (qc->flags & ATA_QCFLAG_SG) {
Jeff Garzike1410f22005-11-14 14:06:26 -05003259 if (qc->n_elem)
Brian King2f1f6102006-03-23 17:30:15 -06003260 dma_unmap_sg(ap->dev, sg, qc->n_elem, dir);
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003261 /* restore last sg */
3262 sg[qc->orig_n_elem - 1].length += qc->pad_len;
3263 if (pad_buf) {
3264 struct scatterlist *psg = &qc->pad_sgent;
3265 void *addr = kmap_atomic(psg->page, KM_IRQ0);
3266 memcpy(addr + psg->offset, pad_buf, qc->pad_len);
Mark Lorddfa15982005-12-12 23:19:28 -05003267 kunmap_atomic(addr, KM_IRQ0);
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003268 }
3269 } else {
Tejun Heo2e242fa2006-02-20 23:48:38 +09003270 if (qc->n_elem)
Brian King2f1f6102006-03-23 17:30:15 -06003271 dma_unmap_single(ap->dev,
Jeff Garzike1410f22005-11-14 14:06:26 -05003272 sg_dma_address(&sg[0]), sg_dma_len(&sg[0]),
3273 dir);
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003274 /* restore sg */
3275 sg->length += qc->pad_len;
3276 if (pad_buf)
3277 memcpy(qc->buf_virt + sg->length - qc->pad_len,
3278 pad_buf, qc->pad_len);
3279 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003280
3281 qc->flags &= ~ATA_QCFLAG_DMAMAP;
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003282 qc->__sg = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003283}
3284
3285/**
3286 * ata_fill_sg - Fill PCI IDE PRD table
3287 * @qc: Metadata associated with taskfile to be transferred
3288 *
Jeff Garzik780a87f2005-05-30 15:41:05 -04003289 * Fill PCI IDE PRD (scatter-gather) table with segments
3290 * associated with the current disk command.
3291 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07003292 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04003293 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003294 *
3295 */
3296static void ata_fill_sg(struct ata_queued_cmd *qc)
3297{
Linus Torvalds1da177e2005-04-16 15:20:36 -07003298 struct ata_port *ap = qc->ap;
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003299 struct scatterlist *sg;
3300 unsigned int idx;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003301
Tejun Heoa4631472006-02-11 19:11:13 +09003302 WARN_ON(qc->__sg == NULL);
Jeff Garzikf1318832006-02-20 16:55:56 -05003303 WARN_ON(qc->n_elem == 0 && qc->pad_len == 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003304
3305 idx = 0;
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003306 ata_for_each_sg(sg, qc) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003307 u32 addr, offset;
3308 u32 sg_len, len;
3309
3310 /* determine if physical DMA addr spans 64K boundary.
3311 * Note h/w doesn't support 64-bit, so we unconditionally
3312 * truncate dma_addr_t to u32.
3313 */
3314 addr = (u32) sg_dma_address(sg);
3315 sg_len = sg_dma_len(sg);
3316
3317 while (sg_len) {
3318 offset = addr & 0xffff;
3319 len = sg_len;
3320 if ((offset + sg_len) > 0x10000)
3321 len = 0x10000 - offset;
3322
3323 ap->prd[idx].addr = cpu_to_le32(addr);
3324 ap->prd[idx].flags_len = cpu_to_le32(len & 0xffff);
3325 VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", idx, addr, len);
3326
3327 idx++;
3328 sg_len -= len;
3329 addr += len;
3330 }
3331 }
3332
3333 if (idx)
3334 ap->prd[idx - 1].flags_len |= cpu_to_le32(ATA_PRD_EOT);
3335}
3336/**
3337 * ata_check_atapi_dma - Check whether ATAPI DMA can be supported
3338 * @qc: Metadata associated with taskfile to check
3339 *
Jeff Garzik780a87f2005-05-30 15:41:05 -04003340 * Allow low-level driver to filter ATA PACKET commands, returning
3341 * a status indicating whether or not it is OK to use DMA for the
3342 * supplied PACKET command.
3343 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07003344 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04003345 * spin_lock_irqsave(host lock)
Jeff Garzik0cba6322005-05-30 19:49:12 -04003346 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07003347 * RETURNS: 0 when ATAPI DMA can be used
3348 * nonzero otherwise
3349 */
3350int ata_check_atapi_dma(struct ata_queued_cmd *qc)
3351{
3352 struct ata_port *ap = qc->ap;
3353 int rc = 0; /* Assume ATAPI DMA is OK by default */
3354
3355 if (ap->ops->check_atapi_dma)
3356 rc = ap->ops->check_atapi_dma(qc);
3357
3358 return rc;
3359}
3360/**
3361 * ata_qc_prep - Prepare taskfile for submission
3362 * @qc: Metadata associated with taskfile to be prepared
3363 *
Jeff Garzik780a87f2005-05-30 15:41:05 -04003364 * Prepare ATA taskfile for submission.
3365 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07003366 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04003367 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003368 */
3369void ata_qc_prep(struct ata_queued_cmd *qc)
3370{
3371 if (!(qc->flags & ATA_QCFLAG_DMAMAP))
3372 return;
3373
3374 ata_fill_sg(qc);
3375}
3376
Brian Kinge46834c2006-03-17 17:04:03 -06003377void ata_noop_qc_prep(struct ata_queued_cmd *qc) { }
3378
Jeff Garzik0cba6322005-05-30 19:49:12 -04003379/**
3380 * ata_sg_init_one - Associate command with memory buffer
3381 * @qc: Command to be associated
3382 * @buf: Memory buffer
3383 * @buflen: Length of memory buffer, in bytes.
3384 *
3385 * Initialize the data-related elements of queued_cmd @qc
3386 * to point to a single memory buffer, @buf of byte length @buflen.
3387 *
3388 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04003389 * spin_lock_irqsave(host lock)
Jeff Garzik0cba6322005-05-30 19:49:12 -04003390 */
3391
Linus Torvalds1da177e2005-04-16 15:20:36 -07003392void ata_sg_init_one(struct ata_queued_cmd *qc, void *buf, unsigned int buflen)
3393{
3394 struct scatterlist *sg;
3395
3396 qc->flags |= ATA_QCFLAG_SINGLE;
3397
3398 memset(&qc->sgent, 0, sizeof(qc->sgent));
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003399 qc->__sg = &qc->sgent;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003400 qc->n_elem = 1;
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003401 qc->orig_n_elem = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003402 qc->buf_virt = buf;
Brian King233277c2006-06-07 11:25:31 -05003403 qc->nbytes = buflen;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003404
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003405 sg = qc->__sg;
Jeff Garzikf0612bb2005-10-30 01:58:18 -05003406 sg_init_one(sg, buf, buflen);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003407}
3408
Jeff Garzik0cba6322005-05-30 19:49:12 -04003409/**
3410 * ata_sg_init - Associate command with scatter-gather table.
3411 * @qc: Command to be associated
3412 * @sg: Scatter-gather table.
3413 * @n_elem: Number of elements in s/g table.
3414 *
3415 * Initialize the data-related elements of queued_cmd @qc
3416 * to point to a scatter-gather table @sg, containing @n_elem
3417 * elements.
3418 *
3419 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04003420 * spin_lock_irqsave(host lock)
Jeff Garzik0cba6322005-05-30 19:49:12 -04003421 */
3422
Linus Torvalds1da177e2005-04-16 15:20:36 -07003423void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
3424 unsigned int n_elem)
3425{
3426 qc->flags |= ATA_QCFLAG_SG;
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003427 qc->__sg = sg;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003428 qc->n_elem = n_elem;
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003429 qc->orig_n_elem = n_elem;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003430}
3431
3432/**
Jeff Garzik0cba6322005-05-30 19:49:12 -04003433 * ata_sg_setup_one - DMA-map the memory buffer associated with a command.
3434 * @qc: Command with memory buffer to be mapped.
3435 *
3436 * DMA-map the memory buffer associated with queued_cmd @qc.
Linus Torvalds1da177e2005-04-16 15:20:36 -07003437 *
3438 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04003439 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003440 *
3441 * RETURNS:
Jeff Garzik0cba6322005-05-30 19:49:12 -04003442 * Zero on success, negative on error.
Linus Torvalds1da177e2005-04-16 15:20:36 -07003443 */
3444
3445static int ata_sg_setup_one(struct ata_queued_cmd *qc)
3446{
3447 struct ata_port *ap = qc->ap;
3448 int dir = qc->dma_dir;
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003449 struct scatterlist *sg = qc->__sg;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003450 dma_addr_t dma_address;
Tejun Heo2e242fa2006-02-20 23:48:38 +09003451 int trim_sg = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003452
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003453 /* we must lengthen transfers to end on a 32-bit boundary */
3454 qc->pad_len = sg->length & 3;
3455 if (qc->pad_len) {
3456 void *pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ);
3457 struct scatterlist *psg = &qc->pad_sgent;
3458
Tejun Heoa4631472006-02-11 19:11:13 +09003459 WARN_ON(qc->dev->class != ATA_DEV_ATAPI);
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003460
3461 memset(pad_buf, 0, ATA_DMA_PAD_SZ);
3462
3463 if (qc->tf.flags & ATA_TFLAG_WRITE)
3464 memcpy(pad_buf, qc->buf_virt + sg->length - qc->pad_len,
3465 qc->pad_len);
3466
3467 sg_dma_address(psg) = ap->pad_dma + (qc->tag * ATA_DMA_PAD_SZ);
3468 sg_dma_len(psg) = ATA_DMA_PAD_SZ;
3469 /* trim sg */
3470 sg->length -= qc->pad_len;
Tejun Heo2e242fa2006-02-20 23:48:38 +09003471 if (sg->length == 0)
3472 trim_sg = 1;
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003473
3474 DPRINTK("padding done, sg->length=%u pad_len=%u\n",
3475 sg->length, qc->pad_len);
3476 }
3477
Tejun Heo2e242fa2006-02-20 23:48:38 +09003478 if (trim_sg) {
3479 qc->n_elem--;
Jeff Garzike1410f22005-11-14 14:06:26 -05003480 goto skip_map;
3481 }
3482
Brian King2f1f6102006-03-23 17:30:15 -06003483 dma_address = dma_map_single(ap->dev, qc->buf_virt,
Albert Lee32529e02005-05-26 03:49:42 -04003484 sg->length, dir);
Tejun Heo537a95d2005-11-05 14:29:01 -05003485 if (dma_mapping_error(dma_address)) {
3486 /* restore sg */
3487 sg->length += qc->pad_len;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003488 return -1;
Tejun Heo537a95d2005-11-05 14:29:01 -05003489 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003490
3491 sg_dma_address(sg) = dma_address;
Albert Lee32529e02005-05-26 03:49:42 -04003492 sg_dma_len(sg) = sg->length;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003493
Tejun Heo2e242fa2006-02-20 23:48:38 +09003494skip_map:
Linus Torvalds1da177e2005-04-16 15:20:36 -07003495 DPRINTK("mapped buffer of %d bytes for %s\n", sg_dma_len(sg),
3496 qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read");
3497
3498 return 0;
3499}
3500
3501/**
Jeff Garzik0cba6322005-05-30 19:49:12 -04003502 * ata_sg_setup - DMA-map the scatter-gather table associated with a command.
3503 * @qc: Command with scatter-gather table to be mapped.
3504 *
3505 * DMA-map the scatter-gather table associated with queued_cmd @qc.
Linus Torvalds1da177e2005-04-16 15:20:36 -07003506 *
3507 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04003508 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003509 *
3510 * RETURNS:
Jeff Garzik0cba6322005-05-30 19:49:12 -04003511 * Zero on success, negative on error.
Linus Torvalds1da177e2005-04-16 15:20:36 -07003512 *
3513 */
3514
3515static int ata_sg_setup(struct ata_queued_cmd *qc)
3516{
3517 struct ata_port *ap = qc->ap;
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003518 struct scatterlist *sg = qc->__sg;
3519 struct scatterlist *lsg = &sg[qc->n_elem - 1];
Jeff Garzike1410f22005-11-14 14:06:26 -05003520 int n_elem, pre_n_elem, dir, trim_sg = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003521
3522 VPRINTK("ENTER, ata%u\n", ap->id);
Tejun Heoa4631472006-02-11 19:11:13 +09003523 WARN_ON(!(qc->flags & ATA_QCFLAG_SG));
Linus Torvalds1da177e2005-04-16 15:20:36 -07003524
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003525 /* we must lengthen transfers to end on a 32-bit boundary */
3526 qc->pad_len = lsg->length & 3;
3527 if (qc->pad_len) {
3528 void *pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ);
3529 struct scatterlist *psg = &qc->pad_sgent;
3530 unsigned int offset;
3531
Tejun Heoa4631472006-02-11 19:11:13 +09003532 WARN_ON(qc->dev->class != ATA_DEV_ATAPI);
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003533
3534 memset(pad_buf, 0, ATA_DMA_PAD_SZ);
3535
3536 /*
3537 * psg->page/offset are used to copy to-be-written
3538 * data in this function or read data in ata_sg_clean.
3539 */
3540 offset = lsg->offset + lsg->length - qc->pad_len;
3541 psg->page = nth_page(lsg->page, offset >> PAGE_SHIFT);
3542 psg->offset = offset_in_page(offset);
3543
3544 if (qc->tf.flags & ATA_TFLAG_WRITE) {
3545 void *addr = kmap_atomic(psg->page, KM_IRQ0);
3546 memcpy(pad_buf, addr + psg->offset, qc->pad_len);
Mark Lorddfa15982005-12-12 23:19:28 -05003547 kunmap_atomic(addr, KM_IRQ0);
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003548 }
3549
3550 sg_dma_address(psg) = ap->pad_dma + (qc->tag * ATA_DMA_PAD_SZ);
3551 sg_dma_len(psg) = ATA_DMA_PAD_SZ;
3552 /* trim last sg */
3553 lsg->length -= qc->pad_len;
Jeff Garzike1410f22005-11-14 14:06:26 -05003554 if (lsg->length == 0)
3555 trim_sg = 1;
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003556
3557 DPRINTK("padding done, sg[%d].length=%u pad_len=%u\n",
3558 qc->n_elem - 1, lsg->length, qc->pad_len);
3559 }
3560
Jeff Garzike1410f22005-11-14 14:06:26 -05003561 pre_n_elem = qc->n_elem;
3562 if (trim_sg && pre_n_elem)
3563 pre_n_elem--;
3564
3565 if (!pre_n_elem) {
3566 n_elem = 0;
3567 goto skip_map;
3568 }
3569
Linus Torvalds1da177e2005-04-16 15:20:36 -07003570 dir = qc->dma_dir;
Brian King2f1f6102006-03-23 17:30:15 -06003571 n_elem = dma_map_sg(ap->dev, sg, pre_n_elem, dir);
Tejun Heo537a95d2005-11-05 14:29:01 -05003572 if (n_elem < 1) {
3573 /* restore last sg */
3574 lsg->length += qc->pad_len;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003575 return -1;
Tejun Heo537a95d2005-11-05 14:29:01 -05003576 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003577
3578 DPRINTK("%d sg elements mapped\n", n_elem);
3579
Jeff Garzike1410f22005-11-14 14:06:26 -05003580skip_map:
Linus Torvalds1da177e2005-04-16 15:20:36 -07003581 qc->n_elem = n_elem;
3582
3583 return 0;
3584}
3585
3586/**
Randy Dunlapc893a3a2006-01-28 13:15:32 -05003587 * swap_buf_le16 - swap halves of 16-bit words in place
Edward Falk0baab862005-06-02 18:17:13 -04003588 * @buf: Buffer to swap
3589 * @buf_words: Number of 16-bit words in buffer.
3590 *
3591 * Swap halves of 16-bit words if needed to convert from
3592 * little-endian byte order to native cpu byte order, or
3593 * vice-versa.
3594 *
3595 * LOCKING:
Randy Dunlap6f0ef4f2005-10-25 01:44:30 -04003596 * Inherited from caller.
Edward Falk0baab862005-06-02 18:17:13 -04003597 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003598void swap_buf_le16(u16 *buf, unsigned int buf_words)
3599{
3600#ifdef __BIG_ENDIAN
3601 unsigned int i;
3602
3603 for (i = 0; i < buf_words; i++)
3604 buf[i] = le16_to_cpu(buf[i]);
3605#endif /* __BIG_ENDIAN */
3606}
3607
Albert Lee6ae4cfb2005-08-12 14:15:34 +08003608/**
3609 * ata_mmio_data_xfer - Transfer data by MMIO
Jeff Garzikbf717b112006-06-13 20:27:03 -04003610 * @adev: device for this I/O
Albert Lee6ae4cfb2005-08-12 14:15:34 +08003611 * @buf: data buffer
3612 * @buflen: buffer length
Jeff Garzik344baba2005-09-07 01:15:17 -04003613 * @write_data: read/write
Albert Lee6ae4cfb2005-08-12 14:15:34 +08003614 *
3615 * Transfer data from/to the device data register by MMIO.
3616 *
3617 * LOCKING:
3618 * Inherited from caller.
Albert Lee6ae4cfb2005-08-12 14:15:34 +08003619 */
3620
Tejun Heo88574552006-06-25 20:00:35 +09003621void ata_mmio_data_xfer(struct ata_device *adev, unsigned char *buf,
Alan Coxa6b2c5d2006-05-22 16:59:59 +01003622 unsigned int buflen, int write_data)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003623{
Alan Coxa6b2c5d2006-05-22 16:59:59 +01003624 struct ata_port *ap = adev->ap;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003625 unsigned int i;
3626 unsigned int words = buflen >> 1;
3627 u16 *buf16 = (u16 *) buf;
3628 void __iomem *mmio = (void __iomem *)ap->ioaddr.data_addr;
3629
Albert Lee6ae4cfb2005-08-12 14:15:34 +08003630 /* Transfer multiple of 2 bytes */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003631 if (write_data) {
3632 for (i = 0; i < words; i++)
3633 writew(le16_to_cpu(buf16[i]), mmio);
3634 } else {
3635 for (i = 0; i < words; i++)
3636 buf16[i] = cpu_to_le16(readw(mmio));
3637 }
Albert Lee6ae4cfb2005-08-12 14:15:34 +08003638
3639 /* Transfer trailing 1 byte, if any. */
3640 if (unlikely(buflen & 0x01)) {
3641 u16 align_buf[1] = { 0 };
3642 unsigned char *trailing_buf = buf + buflen - 1;
3643
3644 if (write_data) {
3645 memcpy(align_buf, trailing_buf, 1);
3646 writew(le16_to_cpu(align_buf[0]), mmio);
3647 } else {
3648 align_buf[0] = cpu_to_le16(readw(mmio));
3649 memcpy(trailing_buf, align_buf, 1);
3650 }
3651 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003652}
3653
Albert Lee6ae4cfb2005-08-12 14:15:34 +08003654/**
3655 * ata_pio_data_xfer - Transfer data by PIO
Alan Coxa6b2c5d2006-05-22 16:59:59 +01003656 * @adev: device to target
Albert Lee6ae4cfb2005-08-12 14:15:34 +08003657 * @buf: data buffer
3658 * @buflen: buffer length
Jeff Garzik344baba2005-09-07 01:15:17 -04003659 * @write_data: read/write
Albert Lee6ae4cfb2005-08-12 14:15:34 +08003660 *
3661 * Transfer data from/to the device data register by PIO.
3662 *
3663 * LOCKING:
3664 * Inherited from caller.
Albert Lee6ae4cfb2005-08-12 14:15:34 +08003665 */
3666
Tejun Heo88574552006-06-25 20:00:35 +09003667void ata_pio_data_xfer(struct ata_device *adev, unsigned char *buf,
Alan Coxa6b2c5d2006-05-22 16:59:59 +01003668 unsigned int buflen, int write_data)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003669{
Alan Coxa6b2c5d2006-05-22 16:59:59 +01003670 struct ata_port *ap = adev->ap;
Albert Lee6ae4cfb2005-08-12 14:15:34 +08003671 unsigned int words = buflen >> 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003672
Albert Lee6ae4cfb2005-08-12 14:15:34 +08003673 /* Transfer multiple of 2 bytes */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003674 if (write_data)
Albert Lee6ae4cfb2005-08-12 14:15:34 +08003675 outsw(ap->ioaddr.data_addr, buf, words);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003676 else
Albert Lee6ae4cfb2005-08-12 14:15:34 +08003677 insw(ap->ioaddr.data_addr, buf, words);
3678
3679 /* Transfer trailing 1 byte, if any. */
3680 if (unlikely(buflen & 0x01)) {
3681 u16 align_buf[1] = { 0 };
3682 unsigned char *trailing_buf = buf + buflen - 1;
3683
3684 if (write_data) {
3685 memcpy(align_buf, trailing_buf, 1);
3686 outw(le16_to_cpu(align_buf[0]), ap->ioaddr.data_addr);
3687 } else {
3688 align_buf[0] = cpu_to_le16(inw(ap->ioaddr.data_addr));
3689 memcpy(trailing_buf, align_buf, 1);
3690 }
3691 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003692}
3693
Albert Lee6ae4cfb2005-08-12 14:15:34 +08003694/**
Alan Cox75e99582006-05-24 14:14:41 +01003695 * ata_pio_data_xfer_noirq - Transfer data by PIO
3696 * @adev: device to target
3697 * @buf: data buffer
3698 * @buflen: buffer length
3699 * @write_data: read/write
3700 *
Tejun Heo88574552006-06-25 20:00:35 +09003701 * Transfer data from/to the device data register by PIO. Do the
Alan Cox75e99582006-05-24 14:14:41 +01003702 * transfer with interrupts disabled.
3703 *
3704 * LOCKING:
3705 * Inherited from caller.
3706 */
3707
3708void ata_pio_data_xfer_noirq(struct ata_device *adev, unsigned char *buf,
3709 unsigned int buflen, int write_data)
3710{
3711 unsigned long flags;
3712 local_irq_save(flags);
3713 ata_pio_data_xfer(adev, buf, buflen, write_data);
3714 local_irq_restore(flags);
3715}
3716
3717
3718/**
Albert Lee6ae4cfb2005-08-12 14:15:34 +08003719 * ata_pio_sector - Transfer ATA_SECT_SIZE (512 bytes) of data.
3720 * @qc: Command on going
3721 *
3722 * Transfer ATA_SECT_SIZE of data from/to the ATA device.
3723 *
3724 * LOCKING:
3725 * Inherited from caller.
3726 */
3727
Linus Torvalds1da177e2005-04-16 15:20:36 -07003728static void ata_pio_sector(struct ata_queued_cmd *qc)
3729{
3730 int do_write = (qc->tf.flags & ATA_TFLAG_WRITE);
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003731 struct scatterlist *sg = qc->__sg;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003732 struct ata_port *ap = qc->ap;
3733 struct page *page;
3734 unsigned int offset;
3735 unsigned char *buf;
3736
3737 if (qc->cursect == (qc->nsect - 1))
Albert Lee14be71f2005-09-27 17:36:35 +08003738 ap->hsm_task_state = HSM_ST_LAST;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003739
3740 page = sg[qc->cursg].page;
3741 offset = sg[qc->cursg].offset + qc->cursg_ofs * ATA_SECT_SIZE;
3742
3743 /* get the current page and offset */
3744 page = nth_page(page, (offset >> PAGE_SHIFT));
3745 offset %= PAGE_SIZE;
3746
Albert Lee7282aa42005-10-09 09:46:07 -04003747 DPRINTK("data %s\n", qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read");
3748
Albert Lee91b8b312005-10-09 09:48:44 -04003749 if (PageHighMem(page)) {
3750 unsigned long flags;
Albert Lee7282aa42005-10-09 09:46:07 -04003751
Alan Coxa6b2c5d2006-05-22 16:59:59 +01003752 /* FIXME: use a bounce buffer */
Albert Lee91b8b312005-10-09 09:48:44 -04003753 local_irq_save(flags);
3754 buf = kmap_atomic(page, KM_IRQ0);
Albert Lee083958d2005-10-09 09:47:31 -04003755
Albert Lee91b8b312005-10-09 09:48:44 -04003756 /* do the actual data transfer */
Alan Coxa6b2c5d2006-05-22 16:59:59 +01003757 ap->ops->data_xfer(qc->dev, buf + offset, ATA_SECT_SIZE, do_write);
Albert Lee91b8b312005-10-09 09:48:44 -04003758
3759 kunmap_atomic(buf, KM_IRQ0);
3760 local_irq_restore(flags);
3761 } else {
3762 buf = page_address(page);
Alan Coxa6b2c5d2006-05-22 16:59:59 +01003763 ap->ops->data_xfer(qc->dev, buf + offset, ATA_SECT_SIZE, do_write);
Albert Lee91b8b312005-10-09 09:48:44 -04003764 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003765
3766 qc->cursect++;
3767 qc->cursg_ofs++;
3768
Albert Lee32529e02005-05-26 03:49:42 -04003769 if ((qc->cursg_ofs * ATA_SECT_SIZE) == (&sg[qc->cursg])->length) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003770 qc->cursg++;
3771 qc->cursg_ofs = 0;
3772 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003773}
Linus Torvalds1da177e2005-04-16 15:20:36 -07003774
Albert Lee6ae4cfb2005-08-12 14:15:34 +08003775/**
Albert Lee07f6f7d2005-11-01 19:33:20 +08003776 * ata_pio_sectors - Transfer one or many 512-byte sectors.
3777 * @qc: Command on going
3778 *
Jeff Garzikc81e29b2006-05-24 01:49:12 -04003779 * Transfer one or many ATA_SECT_SIZE of data from/to the
Albert Lee07f6f7d2005-11-01 19:33:20 +08003780 * ATA device for the DRQ request.
3781 *
3782 * LOCKING:
3783 * Inherited from caller.
3784 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003785
Albert Lee07f6f7d2005-11-01 19:33:20 +08003786static void ata_pio_sectors(struct ata_queued_cmd *qc)
3787{
3788 if (is_multi_taskfile(&qc->tf)) {
3789 /* READ/WRITE MULTIPLE */
3790 unsigned int nsect;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003791
Jeff Garzik587005d2006-02-11 18:17:32 -05003792 WARN_ON(qc->dev->multi_count == 0);
Albert Lee07f6f7d2005-11-01 19:33:20 +08003793
3794 nsect = min(qc->nsect - qc->cursect, qc->dev->multi_count);
3795 while (nsect--)
3796 ata_pio_sector(qc);
3797 } else
3798 ata_pio_sector(qc);
3799}
3800
3801/**
Albert Leec71c1852005-10-04 06:03:45 -04003802 * atapi_send_cdb - Write CDB bytes to hardware
3803 * @ap: Port to which ATAPI device is attached.
3804 * @qc: Taskfile currently active
3805 *
3806 * When device has indicated its readiness to accept
3807 * a CDB, this function is called. Send the CDB.
3808 *
3809 * LOCKING:
3810 * caller.
3811 */
3812
3813static void atapi_send_cdb(struct ata_port *ap, struct ata_queued_cmd *qc)
3814{
3815 /* send SCSI cdb */
3816 DPRINTK("send cdb\n");
Jeff Garzikdb024d52006-02-13 00:23:57 -05003817 WARN_ON(qc->dev->cdb_len < 12);
Albert Leec71c1852005-10-04 06:03:45 -04003818
Alan Coxa6b2c5d2006-05-22 16:59:59 +01003819 ap->ops->data_xfer(qc->dev, qc->cdb, qc->dev->cdb_len, 1);
Albert Leec71c1852005-10-04 06:03:45 -04003820 ata_altstatus(ap); /* flush */
3821
3822 switch (qc->tf.protocol) {
3823 case ATA_PROT_ATAPI:
3824 ap->hsm_task_state = HSM_ST;
3825 break;
3826 case ATA_PROT_ATAPI_NODATA:
3827 ap->hsm_task_state = HSM_ST_LAST;
3828 break;
3829 case ATA_PROT_ATAPI_DMA:
3830 ap->hsm_task_state = HSM_ST_LAST;
3831 /* initiate bmdma */
3832 ap->ops->bmdma_start(qc);
3833 break;
3834 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003835}
3836
Albert Lee6ae4cfb2005-08-12 14:15:34 +08003837/**
3838 * __atapi_pio_bytes - Transfer data from/to the ATAPI device.
3839 * @qc: Command on going
3840 * @bytes: number of bytes
3841 *
3842 * Transfer Transfer data from/to the ATAPI device.
3843 *
3844 * LOCKING:
3845 * Inherited from caller.
3846 *
3847 */
3848
Linus Torvalds1da177e2005-04-16 15:20:36 -07003849static void __atapi_pio_bytes(struct ata_queued_cmd *qc, unsigned int bytes)
3850{
3851 int do_write = (qc->tf.flags & ATA_TFLAG_WRITE);
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003852 struct scatterlist *sg = qc->__sg;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003853 struct ata_port *ap = qc->ap;
3854 struct page *page;
3855 unsigned char *buf;
3856 unsigned int offset, count;
3857
Albert Lee563a6e12005-08-12 14:17:50 +08003858 if (qc->curbytes + bytes >= qc->nbytes)
Albert Lee14be71f2005-09-27 17:36:35 +08003859 ap->hsm_task_state = HSM_ST_LAST;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003860
3861next_sg:
Albert Lee563a6e12005-08-12 14:17:50 +08003862 if (unlikely(qc->cursg >= qc->n_elem)) {
Jeff Garzik7fb6ec22005-09-16 06:01:48 -04003863 /*
Albert Lee563a6e12005-08-12 14:17:50 +08003864 * The end of qc->sg is reached and the device expects
3865 * more data to transfer. In order not to overrun qc->sg
3866 * and fulfill length specified in the byte count register,
3867 * - for read case, discard trailing data from the device
3868 * - for write case, padding zero data to the device
3869 */
3870 u16 pad_buf[1] = { 0 };
3871 unsigned int words = bytes >> 1;
3872 unsigned int i;
3873
3874 if (words) /* warning if bytes > 1 */
Tejun Heof15a1da2006-05-15 20:57:56 +09003875 ata_dev_printk(qc->dev, KERN_WARNING,
3876 "%u bytes trailing data\n", bytes);
Albert Lee563a6e12005-08-12 14:17:50 +08003877
3878 for (i = 0; i < words; i++)
Alan Coxa6b2c5d2006-05-22 16:59:59 +01003879 ap->ops->data_xfer(qc->dev, (unsigned char*)pad_buf, 2, do_write);
Albert Lee563a6e12005-08-12 14:17:50 +08003880
Albert Lee14be71f2005-09-27 17:36:35 +08003881 ap->hsm_task_state = HSM_ST_LAST;
Albert Lee563a6e12005-08-12 14:17:50 +08003882 return;
3883 }
3884
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003885 sg = &qc->__sg[qc->cursg];
Linus Torvalds1da177e2005-04-16 15:20:36 -07003886
Linus Torvalds1da177e2005-04-16 15:20:36 -07003887 page = sg->page;
3888 offset = sg->offset + qc->cursg_ofs;
3889
3890 /* get the current page and offset */
3891 page = nth_page(page, (offset >> PAGE_SHIFT));
3892 offset %= PAGE_SIZE;
3893
Albert Lee6952df02005-06-06 15:56:03 +08003894 /* don't overrun current sg */
Albert Lee32529e02005-05-26 03:49:42 -04003895 count = min(sg->length - qc->cursg_ofs, bytes);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003896
3897 /* don't cross page boundaries */
3898 count = min(count, (unsigned int)PAGE_SIZE - offset);
3899
Albert Lee7282aa42005-10-09 09:46:07 -04003900 DPRINTK("data %s\n", qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read");
3901
Albert Lee91b8b312005-10-09 09:48:44 -04003902 if (PageHighMem(page)) {
3903 unsigned long flags;
Albert Lee7282aa42005-10-09 09:46:07 -04003904
Alan Coxa6b2c5d2006-05-22 16:59:59 +01003905 /* FIXME: use bounce buffer */
Albert Lee91b8b312005-10-09 09:48:44 -04003906 local_irq_save(flags);
3907 buf = kmap_atomic(page, KM_IRQ0);
Albert Lee083958d2005-10-09 09:47:31 -04003908
Albert Lee91b8b312005-10-09 09:48:44 -04003909 /* do the actual data transfer */
Alan Coxa6b2c5d2006-05-22 16:59:59 +01003910 ap->ops->data_xfer(qc->dev, buf + offset, count, do_write);
Albert Lee91b8b312005-10-09 09:48:44 -04003911
3912 kunmap_atomic(buf, KM_IRQ0);
3913 local_irq_restore(flags);
3914 } else {
3915 buf = page_address(page);
Alan Coxa6b2c5d2006-05-22 16:59:59 +01003916 ap->ops->data_xfer(qc->dev, buf + offset, count, do_write);
Albert Lee91b8b312005-10-09 09:48:44 -04003917 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003918
3919 bytes -= count;
3920 qc->curbytes += count;
3921 qc->cursg_ofs += count;
3922
Albert Lee32529e02005-05-26 03:49:42 -04003923 if (qc->cursg_ofs == sg->length) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003924 qc->cursg++;
3925 qc->cursg_ofs = 0;
3926 }
3927
Albert Lee563a6e12005-08-12 14:17:50 +08003928 if (bytes)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003929 goto next_sg;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003930}
3931
Albert Lee6ae4cfb2005-08-12 14:15:34 +08003932/**
3933 * atapi_pio_bytes - Transfer data from/to the ATAPI device.
3934 * @qc: Command on going
3935 *
3936 * Transfer Transfer data from/to the ATAPI device.
3937 *
3938 * LOCKING:
3939 * Inherited from caller.
Albert Lee6ae4cfb2005-08-12 14:15:34 +08003940 */
3941
Linus Torvalds1da177e2005-04-16 15:20:36 -07003942static void atapi_pio_bytes(struct ata_queued_cmd *qc)
3943{
3944 struct ata_port *ap = qc->ap;
3945 struct ata_device *dev = qc->dev;
3946 unsigned int ireason, bc_lo, bc_hi, bytes;
3947 int i_write, do_write = (qc->tf.flags & ATA_TFLAG_WRITE) ? 1 : 0;
3948
Albert Leeeec4c3f2006-05-18 17:51:10 +08003949 /* Abuse qc->result_tf for temp storage of intermediate TF
3950 * here to save some kernel stack usage.
3951 * For normal completion, qc->result_tf is not relevant. For
3952 * error, qc->result_tf is later overwritten by ata_qc_complete().
3953 * So, the correctness of qc->result_tf is not affected.
3954 */
3955 ap->ops->tf_read(ap, &qc->result_tf);
3956 ireason = qc->result_tf.nsect;
3957 bc_lo = qc->result_tf.lbam;
3958 bc_hi = qc->result_tf.lbah;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003959 bytes = (bc_hi << 8) | bc_lo;
3960
3961 /* shall be cleared to zero, indicating xfer of data */
3962 if (ireason & (1 << 0))
3963 goto err_out;
3964
3965 /* make sure transfer direction matches expected */
3966 i_write = ((ireason & (1 << 1)) == 0) ? 1 : 0;
3967 if (do_write != i_write)
3968 goto err_out;
3969
Albert Lee312f7da2005-09-27 17:38:03 +08003970 VPRINTK("ata%u: xfering %d bytes\n", ap->id, bytes);
3971
Linus Torvalds1da177e2005-04-16 15:20:36 -07003972 __atapi_pio_bytes(qc, bytes);
3973
3974 return;
3975
3976err_out:
Tejun Heof15a1da2006-05-15 20:57:56 +09003977 ata_dev_printk(dev, KERN_INFO, "ATAPI check failed\n");
Tejun Heo11a56d22006-01-23 13:09:36 +09003978 qc->err_mask |= AC_ERR_HSM;
Albert Lee14be71f2005-09-27 17:36:35 +08003979 ap->hsm_task_state = HSM_ST_ERR;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003980}
3981
3982/**
Albert Leec234fb02006-03-25 17:58:38 +08003983 * ata_hsm_ok_in_wq - Check if the qc can be handled in the workqueue.
3984 * @ap: the target ata_port
3985 * @qc: qc on going
Linus Torvalds1da177e2005-04-16 15:20:36 -07003986 *
Albert Leec234fb02006-03-25 17:58:38 +08003987 * RETURNS:
3988 * 1 if ok in workqueue, 0 otherwise.
Linus Torvalds1da177e2005-04-16 15:20:36 -07003989 */
Albert Leec234fb02006-03-25 17:58:38 +08003990
3991static inline int ata_hsm_ok_in_wq(struct ata_port *ap, struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003992{
Albert Leec234fb02006-03-25 17:58:38 +08003993 if (qc->tf.flags & ATA_TFLAG_POLLING)
3994 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003995
Albert Leec234fb02006-03-25 17:58:38 +08003996 if (ap->hsm_task_state == HSM_ST_FIRST) {
3997 if (qc->tf.protocol == ATA_PROT_PIO &&
3998 (qc->tf.flags & ATA_TFLAG_WRITE))
3999 return 1;
4000
4001 if (is_atapi_taskfile(&qc->tf) &&
4002 !(qc->dev->flags & ATA_DFLAG_CDB_INTR))
4003 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004004 }
4005
Albert Leec234fb02006-03-25 17:58:38 +08004006 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004007}
4008
Albert Leec234fb02006-03-25 17:58:38 +08004009/**
Tejun Heoc17ea202006-05-15 20:59:29 +09004010 * ata_hsm_qc_complete - finish a qc running on standard HSM
4011 * @qc: Command to complete
4012 * @in_wq: 1 if called from workqueue, 0 otherwise
4013 *
4014 * Finish @qc which is running on standard HSM.
4015 *
4016 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04004017 * If @in_wq is zero, spin_lock_irqsave(host lock).
Tejun Heoc17ea202006-05-15 20:59:29 +09004018 * Otherwise, none on entry and grabs host lock.
4019 */
4020static void ata_hsm_qc_complete(struct ata_queued_cmd *qc, int in_wq)
4021{
4022 struct ata_port *ap = qc->ap;
4023 unsigned long flags;
4024
4025 if (ap->ops->error_handler) {
4026 if (in_wq) {
Jeff Garzikba6a1302006-06-22 23:46:10 -04004027 spin_lock_irqsave(ap->lock, flags);
Tejun Heoc17ea202006-05-15 20:59:29 +09004028
Jeff Garzikcca39742006-08-24 03:19:22 -04004029 /* EH might have kicked in while host lock is
4030 * released.
Tejun Heoc17ea202006-05-15 20:59:29 +09004031 */
4032 qc = ata_qc_from_tag(ap, qc->tag);
4033 if (qc) {
4034 if (likely(!(qc->err_mask & AC_ERR_HSM))) {
4035 ata_irq_on(ap);
4036 ata_qc_complete(qc);
4037 } else
4038 ata_port_freeze(ap);
4039 }
4040
Jeff Garzikba6a1302006-06-22 23:46:10 -04004041 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heoc17ea202006-05-15 20:59:29 +09004042 } else {
4043 if (likely(!(qc->err_mask & AC_ERR_HSM)))
4044 ata_qc_complete(qc);
4045 else
4046 ata_port_freeze(ap);
4047 }
4048 } else {
4049 if (in_wq) {
Jeff Garzikba6a1302006-06-22 23:46:10 -04004050 spin_lock_irqsave(ap->lock, flags);
Tejun Heoc17ea202006-05-15 20:59:29 +09004051 ata_irq_on(ap);
4052 ata_qc_complete(qc);
Jeff Garzikba6a1302006-06-22 23:46:10 -04004053 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heoc17ea202006-05-15 20:59:29 +09004054 } else
4055 ata_qc_complete(qc);
4056 }
Jeff Garzikc81e29b2006-05-24 01:49:12 -04004057
4058 ata_altstatus(ap); /* flush */
Tejun Heoc17ea202006-05-15 20:59:29 +09004059}
4060
4061/**
Albert Leebb5cb292006-03-25 17:48:02 +08004062 * ata_hsm_move - move the HSM to the next state.
4063 * @ap: the target ata_port
4064 * @qc: qc on going
4065 * @status: current device status
4066 * @in_wq: 1 if called from workqueue, 0 otherwise
4067 *
4068 * RETURNS:
4069 * 1 when poll next status needed, 0 otherwise.
4070 */
Tejun Heo9a1004d2006-05-31 18:27:52 +09004071int ata_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc,
4072 u8 status, int in_wq)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004073{
Albert Leebb5cb292006-03-25 17:48:02 +08004074 unsigned long flags = 0;
4075 int poll_next;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004076
Albert Lee6912ccd2006-03-25 17:45:49 +08004077 WARN_ON((qc->flags & ATA_QCFLAG_ACTIVE) == 0);
Albert Lee0565c262006-02-13 18:55:25 +08004078
Albert Leebb5cb292006-03-25 17:48:02 +08004079 /* Make sure ata_qc_issue_prot() does not throw things
4080 * like DMA polling into the workqueue. Notice that
4081 * in_wq is not equivalent to (qc->tf.flags & ATA_TFLAG_POLLING).
Albert Lee1c848982005-12-05 15:40:15 +08004082 */
Albert Leec234fb02006-03-25 17:58:38 +08004083 WARN_ON(in_wq != ata_hsm_ok_in_wq(ap, qc));
Albert Lee1c848982005-12-05 15:40:15 +08004084
Albert Leee2cec772006-03-25 17:43:49 +08004085fsm_start:
Albert Lee999bb6f2006-03-25 18:07:48 +08004086 DPRINTK("ata%u: protocol %d task_state %d (dev_stat 0x%X)\n",
4087 ap->id, qc->tf.protocol, ap->hsm_task_state, status);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004088
Albert Leee2cec772006-03-25 17:43:49 +08004089 switch (ap->hsm_task_state) {
4090 case HSM_ST_FIRST:
Albert Leebb5cb292006-03-25 17:48:02 +08004091 /* Send first data block or PACKET CDB */
4092
4093 /* If polling, we will stay in the work queue after
4094 * sending the data. Otherwise, interrupt handler
4095 * takes over after sending the data.
4096 */
4097 poll_next = (qc->tf.flags & ATA_TFLAG_POLLING);
4098
Albert Leee2cec772006-03-25 17:43:49 +08004099 /* check device status */
Albert Lee3655d1d2006-05-19 11:43:04 +08004100 if (unlikely((status & ATA_DRQ) == 0)) {
4101 /* handle BSY=0, DRQ=0 as error */
4102 if (likely(status & (ATA_ERR | ATA_DF)))
4103 /* device stops HSM for abort/error */
4104 qc->err_mask |= AC_ERR_DEV;
4105 else
4106 /* HSM violation. Let EH handle this */
4107 qc->err_mask |= AC_ERR_HSM;
4108
Albert Leee2cec772006-03-25 17:43:49 +08004109 ap->hsm_task_state = HSM_ST_ERR;
4110 goto fsm_start;
4111 }
4112
Albert Lee71601952006-03-25 18:11:12 +08004113 /* Device should not ask for data transfer (DRQ=1)
4114 * when it finds something wrong.
Albert Leeeee6c322006-04-01 17:38:43 +08004115 * We ignore DRQ here and stop the HSM by
4116 * changing hsm_task_state to HSM_ST_ERR and
4117 * let the EH abort the command or reset the device.
Albert Lee71601952006-03-25 18:11:12 +08004118 */
4119 if (unlikely(status & (ATA_ERR | ATA_DF))) {
4120 printk(KERN_WARNING "ata%d: DRQ=1 with device error, dev_stat 0x%X\n",
4121 ap->id, status);
Albert Lee3655d1d2006-05-19 11:43:04 +08004122 qc->err_mask |= AC_ERR_HSM;
Albert Leeeee6c322006-04-01 17:38:43 +08004123 ap->hsm_task_state = HSM_ST_ERR;
4124 goto fsm_start;
Albert Lee71601952006-03-25 18:11:12 +08004125 }
4126
Albert Leebb5cb292006-03-25 17:48:02 +08004127 /* Send the CDB (atapi) or the first data block (ata pio out).
4128 * During the state transition, interrupt handler shouldn't
4129 * be invoked before the data transfer is complete and
4130 * hsm_task_state is changed. Hence, the following locking.
4131 */
4132 if (in_wq)
Jeff Garzikba6a1302006-06-22 23:46:10 -04004133 spin_lock_irqsave(ap->lock, flags);
Albert Leee2cec772006-03-25 17:43:49 +08004134
Albert Leebb5cb292006-03-25 17:48:02 +08004135 if (qc->tf.protocol == ATA_PROT_PIO) {
4136 /* PIO data out protocol.
4137 * send first data block.
4138 */
4139
4140 /* ata_pio_sectors() might change the state
4141 * to HSM_ST_LAST. so, the state is changed here
4142 * before ata_pio_sectors().
4143 */
4144 ap->hsm_task_state = HSM_ST;
4145 ata_pio_sectors(qc);
4146 ata_altstatus(ap); /* flush */
4147 } else
4148 /* send CDB */
4149 atapi_send_cdb(ap, qc);
4150
4151 if (in_wq)
Jeff Garzikba6a1302006-06-22 23:46:10 -04004152 spin_unlock_irqrestore(ap->lock, flags);
Albert Leebb5cb292006-03-25 17:48:02 +08004153
4154 /* if polling, ata_pio_task() handles the rest.
4155 * otherwise, interrupt handler takes over from here.
4156 */
Albert Leee2cec772006-03-25 17:43:49 +08004157 break;
4158
4159 case HSM_ST:
4160 /* complete command or read/write the data register */
4161 if (qc->tf.protocol == ATA_PROT_ATAPI) {
4162 /* ATAPI PIO protocol */
4163 if ((status & ATA_DRQ) == 0) {
Albert Lee3655d1d2006-05-19 11:43:04 +08004164 /* No more data to transfer or device error.
4165 * Device error will be tagged in HSM_ST_LAST.
4166 */
Albert Leee2cec772006-03-25 17:43:49 +08004167 ap->hsm_task_state = HSM_ST_LAST;
4168 goto fsm_start;
4169 }
4170
Albert Lee71601952006-03-25 18:11:12 +08004171 /* Device should not ask for data transfer (DRQ=1)
4172 * when it finds something wrong.
Albert Leeeee6c322006-04-01 17:38:43 +08004173 * We ignore DRQ here and stop the HSM by
4174 * changing hsm_task_state to HSM_ST_ERR and
4175 * let the EH abort the command or reset the device.
Albert Lee71601952006-03-25 18:11:12 +08004176 */
4177 if (unlikely(status & (ATA_ERR | ATA_DF))) {
4178 printk(KERN_WARNING "ata%d: DRQ=1 with device error, dev_stat 0x%X\n",
4179 ap->id, status);
Albert Lee3655d1d2006-05-19 11:43:04 +08004180 qc->err_mask |= AC_ERR_HSM;
Albert Leeeee6c322006-04-01 17:38:43 +08004181 ap->hsm_task_state = HSM_ST_ERR;
4182 goto fsm_start;
Albert Lee71601952006-03-25 18:11:12 +08004183 }
4184
Albert Leee2cec772006-03-25 17:43:49 +08004185 atapi_pio_bytes(qc);
4186
4187 if (unlikely(ap->hsm_task_state == HSM_ST_ERR))
4188 /* bad ireason reported by device */
4189 goto fsm_start;
4190
4191 } else {
4192 /* ATA PIO protocol */
4193 if (unlikely((status & ATA_DRQ) == 0)) {
4194 /* handle BSY=0, DRQ=0 as error */
Albert Lee3655d1d2006-05-19 11:43:04 +08004195 if (likely(status & (ATA_ERR | ATA_DF)))
4196 /* device stops HSM for abort/error */
4197 qc->err_mask |= AC_ERR_DEV;
4198 else
4199 /* HSM violation. Let EH handle this */
4200 qc->err_mask |= AC_ERR_HSM;
4201
Albert Leee2cec772006-03-25 17:43:49 +08004202 ap->hsm_task_state = HSM_ST_ERR;
4203 goto fsm_start;
4204 }
4205
Albert Leeeee6c322006-04-01 17:38:43 +08004206 /* For PIO reads, some devices may ask for
4207 * data transfer (DRQ=1) alone with ERR=1.
4208 * We respect DRQ here and transfer one
4209 * block of junk data before changing the
4210 * hsm_task_state to HSM_ST_ERR.
4211 *
4212 * For PIO writes, ERR=1 DRQ=1 doesn't make
4213 * sense since the data block has been
4214 * transferred to the device.
Albert Lee71601952006-03-25 18:11:12 +08004215 */
4216 if (unlikely(status & (ATA_ERR | ATA_DF))) {
Albert Lee71601952006-03-25 18:11:12 +08004217 /* data might be corrputed */
4218 qc->err_mask |= AC_ERR_DEV;
Albert Leeeee6c322006-04-01 17:38:43 +08004219
4220 if (!(qc->tf.flags & ATA_TFLAG_WRITE)) {
4221 ata_pio_sectors(qc);
4222 ata_altstatus(ap);
4223 status = ata_wait_idle(ap);
4224 }
4225
Albert Lee3655d1d2006-05-19 11:43:04 +08004226 if (status & (ATA_BUSY | ATA_DRQ))
4227 qc->err_mask |= AC_ERR_HSM;
4228
Albert Leeeee6c322006-04-01 17:38:43 +08004229 /* ata_pio_sectors() might change the
4230 * state to HSM_ST_LAST. so, the state
4231 * is changed after ata_pio_sectors().
4232 */
4233 ap->hsm_task_state = HSM_ST_ERR;
4234 goto fsm_start;
Albert Lee71601952006-03-25 18:11:12 +08004235 }
4236
Albert Leee2cec772006-03-25 17:43:49 +08004237 ata_pio_sectors(qc);
4238
4239 if (ap->hsm_task_state == HSM_ST_LAST &&
4240 (!(qc->tf.flags & ATA_TFLAG_WRITE))) {
4241 /* all data read */
4242 ata_altstatus(ap);
Albert Lee52a32202006-03-25 18:18:15 +08004243 status = ata_wait_idle(ap);
Albert Leee2cec772006-03-25 17:43:49 +08004244 goto fsm_start;
4245 }
4246 }
4247
4248 ata_altstatus(ap); /* flush */
Albert Leebb5cb292006-03-25 17:48:02 +08004249 poll_next = 1;
Albert Leee2cec772006-03-25 17:43:49 +08004250 break;
4251
4252 case HSM_ST_LAST:
Albert Lee6912ccd2006-03-25 17:45:49 +08004253 if (unlikely(!ata_ok(status))) {
4254 qc->err_mask |= __ac_err_mask(status);
Albert Leee2cec772006-03-25 17:43:49 +08004255 ap->hsm_task_state = HSM_ST_ERR;
4256 goto fsm_start;
4257 }
4258
4259 /* no more data to transfer */
Albert Lee4332a772006-04-03 17:43:24 +08004260 DPRINTK("ata%u: dev %u command complete, drv_stat 0x%x\n",
4261 ap->id, qc->dev->devno, status);
Albert Leee2cec772006-03-25 17:43:49 +08004262
Albert Lee6912ccd2006-03-25 17:45:49 +08004263 WARN_ON(qc->err_mask);
4264
Albert Leee2cec772006-03-25 17:43:49 +08004265 ap->hsm_task_state = HSM_ST_IDLE;
4266
4267 /* complete taskfile transaction */
Tejun Heoc17ea202006-05-15 20:59:29 +09004268 ata_hsm_qc_complete(qc, in_wq);
Albert Leebb5cb292006-03-25 17:48:02 +08004269
4270 poll_next = 0;
Albert Leee2cec772006-03-25 17:43:49 +08004271 break;
4272
4273 case HSM_ST_ERR:
Albert Leee2cec772006-03-25 17:43:49 +08004274 /* make sure qc->err_mask is available to
4275 * know what's wrong and recover
4276 */
4277 WARN_ON(qc->err_mask == 0);
4278
4279 ap->hsm_task_state = HSM_ST_IDLE;
Albert Leebb5cb292006-03-25 17:48:02 +08004280
Albert Lee999bb6f2006-03-25 18:07:48 +08004281 /* complete taskfile transaction */
Tejun Heoc17ea202006-05-15 20:59:29 +09004282 ata_hsm_qc_complete(qc, in_wq);
Albert Leebb5cb292006-03-25 17:48:02 +08004283
4284 poll_next = 0;
Albert Leee2cec772006-03-25 17:43:49 +08004285 break;
4286 default:
Albert Leebb5cb292006-03-25 17:48:02 +08004287 poll_next = 0;
Albert Lee6912ccd2006-03-25 17:45:49 +08004288 BUG();
Albert Leee2cec772006-03-25 17:43:49 +08004289 }
4290
Albert Leebb5cb292006-03-25 17:48:02 +08004291 return poll_next;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004292}
4293
4294static void ata_pio_task(void *_data)
4295{
Tejun Heoc91af2c2006-04-02 18:51:53 +09004296 struct ata_queued_cmd *qc = _data;
4297 struct ata_port *ap = qc->ap;
Albert Leea1af3732006-03-25 17:50:15 +08004298 u8 status;
4299 int poll_next;
Jeff Garzik7fb6ec22005-09-16 06:01:48 -04004300
4301fsm_start:
Albert Leea1af3732006-03-25 17:50:15 +08004302 WARN_ON(ap->hsm_task_state == HSM_ST_IDLE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004303
Albert Leea1af3732006-03-25 17:50:15 +08004304 /*
4305 * This is purely heuristic. This is a fast path.
4306 * Sometimes when we enter, BSY will be cleared in
4307 * a chk-status or two. If not, the drive is probably seeking
4308 * or something. Snooze for a couple msecs, then
4309 * chk-status again. If still busy, queue delayed work.
4310 */
4311 status = ata_busy_wait(ap, ATA_BUSY, 5);
4312 if (status & ATA_BUSY) {
4313 msleep(2);
4314 status = ata_busy_wait(ap, ATA_BUSY, 10);
4315 if (status & ATA_BUSY) {
Albert Lee31ce6da2006-04-03 18:31:44 +08004316 ata_port_queue_task(ap, ata_pio_task, qc, ATA_SHORT_PAUSE);
Albert Leea1af3732006-03-25 17:50:15 +08004317 return;
4318 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07004319 }
4320
Albert Leea1af3732006-03-25 17:50:15 +08004321 /* move the HSM */
4322 poll_next = ata_hsm_move(ap, qc, status, 1);
4323
4324 /* another command or interrupt handler
4325 * may be running at this point.
4326 */
4327 if (poll_next)
Jeff Garzik7fb6ec22005-09-16 06:01:48 -04004328 goto fsm_start;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004329}
4330
Linus Torvalds1da177e2005-04-16 15:20:36 -07004331/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07004332 * ata_qc_new - Request an available ATA command, for queueing
4333 * @ap: Port associated with device @dev
4334 * @dev: Device from whom we request an available command structure
4335 *
4336 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04004337 * None.
Linus Torvalds1da177e2005-04-16 15:20:36 -07004338 */
4339
4340static struct ata_queued_cmd *ata_qc_new(struct ata_port *ap)
4341{
4342 struct ata_queued_cmd *qc = NULL;
4343 unsigned int i;
4344
Tejun Heoe3180492006-05-15 20:58:09 +09004345 /* no command while frozen */
Tejun Heob51e9e52006-06-29 01:29:30 +09004346 if (unlikely(ap->pflags & ATA_PFLAG_FROZEN))
Tejun Heoe3180492006-05-15 20:58:09 +09004347 return NULL;
4348
Tejun Heo2ab7db12006-05-15 20:58:02 +09004349 /* the last tag is reserved for internal command. */
4350 for (i = 0; i < ATA_MAX_QUEUE - 1; i++)
Tejun Heo6cec4a32006-05-15 21:03:41 +09004351 if (!test_and_set_bit(i, &ap->qc_allocated)) {
Tejun Heof69499f2006-05-15 20:58:03 +09004352 qc = __ata_qc_from_tag(ap, i);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004353 break;
4354 }
4355
4356 if (qc)
4357 qc->tag = i;
4358
4359 return qc;
4360}
4361
4362/**
4363 * ata_qc_new_init - Request an available ATA command, and initialize it
Linus Torvalds1da177e2005-04-16 15:20:36 -07004364 * @dev: Device from whom we request an available command structure
4365 *
4366 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04004367 * None.
Linus Torvalds1da177e2005-04-16 15:20:36 -07004368 */
4369
Tejun Heo3373efd2006-05-15 20:57:53 +09004370struct ata_queued_cmd *ata_qc_new_init(struct ata_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004371{
Tejun Heo3373efd2006-05-15 20:57:53 +09004372 struct ata_port *ap = dev->ap;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004373 struct ata_queued_cmd *qc;
4374
4375 qc = ata_qc_new(ap);
4376 if (qc) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07004377 qc->scsicmd = NULL;
4378 qc->ap = ap;
4379 qc->dev = dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004380
Jeff Garzik2c13b7c2005-11-14 14:14:16 -05004381 ata_qc_reinit(qc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004382 }
4383
4384 return qc;
4385}
4386
Linus Torvalds1da177e2005-04-16 15:20:36 -07004387/**
4388 * ata_qc_free - free unused ata_queued_cmd
4389 * @qc: Command to complete
4390 *
4391 * Designed to free unused ata_queued_cmd object
4392 * in case something prevents using it.
4393 *
4394 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04004395 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004396 */
4397void ata_qc_free(struct ata_queued_cmd *qc)
4398{
Tejun Heo4ba946e2006-01-23 13:09:36 +09004399 struct ata_port *ap = qc->ap;
4400 unsigned int tag;
4401
Tejun Heoa4631472006-02-11 19:11:13 +09004402 WARN_ON(qc == NULL); /* ata_qc_from_tag _might_ return NULL */
Linus Torvalds1da177e2005-04-16 15:20:36 -07004403
Tejun Heo4ba946e2006-01-23 13:09:36 +09004404 qc->flags = 0;
4405 tag = qc->tag;
4406 if (likely(ata_tag_valid(tag))) {
Tejun Heo4ba946e2006-01-23 13:09:36 +09004407 qc->tag = ATA_TAG_POISON;
Tejun Heo6cec4a32006-05-15 21:03:41 +09004408 clear_bit(tag, &ap->qc_allocated);
Tejun Heo4ba946e2006-01-23 13:09:36 +09004409 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07004410}
4411
Tejun Heo76014422006-02-11 15:13:49 +09004412void __ata_qc_complete(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004413{
Tejun Heodedaf2b2006-05-15 21:03:43 +09004414 struct ata_port *ap = qc->ap;
4415
Tejun Heoa4631472006-02-11 19:11:13 +09004416 WARN_ON(qc == NULL); /* ata_qc_from_tag _might_ return NULL */
4417 WARN_ON(!(qc->flags & ATA_QCFLAG_ACTIVE));
Linus Torvalds1da177e2005-04-16 15:20:36 -07004418
4419 if (likely(qc->flags & ATA_QCFLAG_DMAMAP))
4420 ata_sg_clean(qc);
4421
Tejun Heo7401abf2006-05-15 20:57:32 +09004422 /* command should be marked inactive atomically with qc completion */
Tejun Heodedaf2b2006-05-15 21:03:43 +09004423 if (qc->tf.protocol == ATA_PROT_NCQ)
4424 ap->sactive &= ~(1 << qc->tag);
4425 else
4426 ap->active_tag = ATA_TAG_POISON;
Tejun Heo7401abf2006-05-15 20:57:32 +09004427
Albert Lee3f3791d2005-08-16 14:25:38 +08004428 /* atapi: mark qc as inactive to prevent the interrupt handler
4429 * from completing the command twice later, before the error handler
4430 * is called. (when rc != 0 and atapi request sense is needed)
4431 */
4432 qc->flags &= ~ATA_QCFLAG_ACTIVE;
Tejun Heodedaf2b2006-05-15 21:03:43 +09004433 ap->qc_active &= ~(1 << qc->tag);
Albert Lee3f3791d2005-08-16 14:25:38 +08004434
Linus Torvalds1da177e2005-04-16 15:20:36 -07004435 /* call completion callback */
Tejun Heo77853bf2006-01-23 13:09:36 +09004436 qc->complete_fn(qc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004437}
4438
Tejun Heof686bcb2006-05-15 20:58:05 +09004439/**
4440 * ata_qc_complete - Complete an active ATA command
4441 * @qc: Command to complete
4442 * @err_mask: ATA Status register contents
4443 *
4444 * Indicate to the mid and upper layers that an ATA
4445 * command has completed, with either an ok or not-ok status.
4446 *
4447 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04004448 * spin_lock_irqsave(host lock)
Tejun Heof686bcb2006-05-15 20:58:05 +09004449 */
4450void ata_qc_complete(struct ata_queued_cmd *qc)
4451{
4452 struct ata_port *ap = qc->ap;
4453
4454 /* XXX: New EH and old EH use different mechanisms to
4455 * synchronize EH with regular execution path.
4456 *
4457 * In new EH, a failed qc is marked with ATA_QCFLAG_FAILED.
4458 * Normal execution path is responsible for not accessing a
4459 * failed qc. libata core enforces the rule by returning NULL
4460 * from ata_qc_from_tag() for failed qcs.
4461 *
4462 * Old EH depends on ata_qc_complete() nullifying completion
4463 * requests if ATA_QCFLAG_EH_SCHEDULED is set. Old EH does
4464 * not synchronize with interrupt handler. Only PIO task is
4465 * taken care of.
4466 */
4467 if (ap->ops->error_handler) {
Tejun Heob51e9e52006-06-29 01:29:30 +09004468 WARN_ON(ap->pflags & ATA_PFLAG_FROZEN);
Tejun Heof686bcb2006-05-15 20:58:05 +09004469
4470 if (unlikely(qc->err_mask))
4471 qc->flags |= ATA_QCFLAG_FAILED;
4472
4473 if (unlikely(qc->flags & ATA_QCFLAG_FAILED)) {
4474 if (!ata_tag_internal(qc->tag)) {
4475 /* always fill result TF for failed qc */
4476 ap->ops->tf_read(ap, &qc->result_tf);
4477 ata_qc_schedule_eh(qc);
4478 return;
4479 }
4480 }
4481
4482 /* read result TF if requested */
4483 if (qc->flags & ATA_QCFLAG_RESULT_TF)
4484 ap->ops->tf_read(ap, &qc->result_tf);
4485
4486 __ata_qc_complete(qc);
4487 } else {
4488 if (qc->flags & ATA_QCFLAG_EH_SCHEDULED)
4489 return;
4490
4491 /* read result TF if failed or requested */
4492 if (qc->err_mask || qc->flags & ATA_QCFLAG_RESULT_TF)
4493 ap->ops->tf_read(ap, &qc->result_tf);
4494
4495 __ata_qc_complete(qc);
4496 }
4497}
4498
Tejun Heodedaf2b2006-05-15 21:03:43 +09004499/**
4500 * ata_qc_complete_multiple - Complete multiple qcs successfully
4501 * @ap: port in question
4502 * @qc_active: new qc_active mask
4503 * @finish_qc: LLDD callback invoked before completing a qc
4504 *
4505 * Complete in-flight commands. This functions is meant to be
4506 * called from low-level driver's interrupt routine to complete
4507 * requests normally. ap->qc_active and @qc_active is compared
4508 * and commands are completed accordingly.
4509 *
4510 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04004511 * spin_lock_irqsave(host lock)
Tejun Heodedaf2b2006-05-15 21:03:43 +09004512 *
4513 * RETURNS:
4514 * Number of completed commands on success, -errno otherwise.
4515 */
4516int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active,
4517 void (*finish_qc)(struct ata_queued_cmd *))
4518{
4519 int nr_done = 0;
4520 u32 done_mask;
4521 int i;
4522
4523 done_mask = ap->qc_active ^ qc_active;
4524
4525 if (unlikely(done_mask & qc_active)) {
4526 ata_port_printk(ap, KERN_ERR, "illegal qc_active transition "
4527 "(%08x->%08x)\n", ap->qc_active, qc_active);
4528 return -EINVAL;
4529 }
4530
4531 for (i = 0; i < ATA_MAX_QUEUE; i++) {
4532 struct ata_queued_cmd *qc;
4533
4534 if (!(done_mask & (1 << i)))
4535 continue;
4536
4537 if ((qc = ata_qc_from_tag(ap, i))) {
4538 if (finish_qc)
4539 finish_qc(qc);
4540 ata_qc_complete(qc);
4541 nr_done++;
4542 }
4543 }
4544
4545 return nr_done;
4546}
4547
Linus Torvalds1da177e2005-04-16 15:20:36 -07004548static inline int ata_should_dma_map(struct ata_queued_cmd *qc)
4549{
4550 struct ata_port *ap = qc->ap;
4551
4552 switch (qc->tf.protocol) {
Tejun Heo3dc1d882006-05-15 21:03:45 +09004553 case ATA_PROT_NCQ:
Linus Torvalds1da177e2005-04-16 15:20:36 -07004554 case ATA_PROT_DMA:
4555 case ATA_PROT_ATAPI_DMA:
4556 return 1;
4557
4558 case ATA_PROT_ATAPI:
4559 case ATA_PROT_PIO:
Linus Torvalds1da177e2005-04-16 15:20:36 -07004560 if (ap->flags & ATA_FLAG_PIO_DMA)
4561 return 1;
4562
4563 /* fall through */
4564
4565 default:
4566 return 0;
4567 }
4568
4569 /* never reached */
4570}
4571
4572/**
4573 * ata_qc_issue - issue taskfile to device
4574 * @qc: command to issue to device
4575 *
4576 * Prepare an ATA command to submission to device.
4577 * This includes mapping the data into a DMA-able
4578 * area, filling in the S/G table, and finally
4579 * writing the taskfile to hardware, starting the command.
4580 *
4581 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04004582 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004583 */
Tejun Heo8e0e6942006-03-31 20:41:11 +09004584void ata_qc_issue(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004585{
4586 struct ata_port *ap = qc->ap;
4587
Tejun Heodedaf2b2006-05-15 21:03:43 +09004588 /* Make sure only one non-NCQ command is outstanding. The
4589 * check is skipped for old EH because it reuses active qc to
4590 * request ATAPI sense.
4591 */
4592 WARN_ON(ap->ops->error_handler && ata_tag_valid(ap->active_tag));
4593
4594 if (qc->tf.protocol == ATA_PROT_NCQ) {
4595 WARN_ON(ap->sactive & (1 << qc->tag));
4596 ap->sactive |= 1 << qc->tag;
4597 } else {
4598 WARN_ON(ap->sactive);
4599 ap->active_tag = qc->tag;
4600 }
4601
Tejun Heoe4a70e72006-03-31 20:36:47 +09004602 qc->flags |= ATA_QCFLAG_ACTIVE;
Tejun Heodedaf2b2006-05-15 21:03:43 +09004603 ap->qc_active |= 1 << qc->tag;
Tejun Heoe4a70e72006-03-31 20:36:47 +09004604
Linus Torvalds1da177e2005-04-16 15:20:36 -07004605 if (ata_should_dma_map(qc)) {
4606 if (qc->flags & ATA_QCFLAG_SG) {
4607 if (ata_sg_setup(qc))
Tejun Heo8e436af2006-01-23 13:09:36 +09004608 goto sg_err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004609 } else if (qc->flags & ATA_QCFLAG_SINGLE) {
4610 if (ata_sg_setup_one(qc))
Tejun Heo8e436af2006-01-23 13:09:36 +09004611 goto sg_err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004612 }
4613 } else {
4614 qc->flags &= ~ATA_QCFLAG_DMAMAP;
4615 }
4616
4617 ap->ops->qc_prep(qc);
4618
Tejun Heo8e0e6942006-03-31 20:41:11 +09004619 qc->err_mask |= ap->ops->qc_issue(qc);
4620 if (unlikely(qc->err_mask))
4621 goto err;
4622 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004623
Tejun Heo8e436af2006-01-23 13:09:36 +09004624sg_err:
4625 qc->flags &= ~ATA_QCFLAG_DMAMAP;
Tejun Heo8e0e6942006-03-31 20:41:11 +09004626 qc->err_mask |= AC_ERR_SYSTEM;
4627err:
4628 ata_qc_complete(qc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004629}
4630
4631/**
4632 * ata_qc_issue_prot - issue taskfile to device in proto-dependent manner
4633 * @qc: command to issue to device
4634 *
4635 * Using various libata functions and hooks, this function
4636 * starts an ATA command. ATA commands are grouped into
4637 * classes called "protocols", and issuing each type of protocol
4638 * is slightly different.
4639 *
Edward Falk0baab862005-06-02 18:17:13 -04004640 * May be used as the qc_issue() entry in ata_port_operations.
4641 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07004642 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04004643 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004644 *
4645 * RETURNS:
Tejun Heo9a3d9eb2006-01-23 13:09:36 +09004646 * Zero on success, AC_ERR_* mask on failure
Linus Torvalds1da177e2005-04-16 15:20:36 -07004647 */
4648
Tejun Heo9a3d9eb2006-01-23 13:09:36 +09004649unsigned int ata_qc_issue_prot(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004650{
4651 struct ata_port *ap = qc->ap;
4652
Albert Leee50362e2005-09-27 17:39:50 +08004653 /* Use polling pio if the LLD doesn't handle
4654 * interrupt driven pio and atapi CDB interrupt.
4655 */
4656 if (ap->flags & ATA_FLAG_PIO_POLLING) {
4657 switch (qc->tf.protocol) {
4658 case ATA_PROT_PIO:
4659 case ATA_PROT_ATAPI:
4660 case ATA_PROT_ATAPI_NODATA:
4661 qc->tf.flags |= ATA_TFLAG_POLLING;
4662 break;
4663 case ATA_PROT_ATAPI_DMA:
4664 if (qc->dev->flags & ATA_DFLAG_CDB_INTR)
Albert Lee3a778272006-06-22 13:00:25 +08004665 /* see ata_dma_blacklisted() */
Albert Leee50362e2005-09-27 17:39:50 +08004666 BUG();
4667 break;
4668 default:
4669 break;
4670 }
4671 }
4672
Albert Lee312f7da2005-09-27 17:38:03 +08004673 /* select the device */
Linus Torvalds1da177e2005-04-16 15:20:36 -07004674 ata_dev_select(ap, qc->dev->devno, 1, 0);
4675
Albert Lee312f7da2005-09-27 17:38:03 +08004676 /* start the command */
Linus Torvalds1da177e2005-04-16 15:20:36 -07004677 switch (qc->tf.protocol) {
4678 case ATA_PROT_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);
Albert Lee312f7da2005-09-27 17:38:03 +08004683 ap->hsm_task_state = HSM_ST_LAST;
4684
4685 if (qc->tf.flags & ATA_TFLAG_POLLING)
Albert Lee31ce6da2006-04-03 18:31:44 +08004686 ata_port_queue_task(ap, ata_pio_task, qc, 0);
Albert Lee312f7da2005-09-27 17:38:03 +08004687
Linus Torvalds1da177e2005-04-16 15:20:36 -07004688 break;
4689
4690 case ATA_PROT_DMA:
Jeff Garzik587005d2006-02-11 18:17:32 -05004691 WARN_ON(qc->tf.flags & ATA_TFLAG_POLLING);
Albert Lee312f7da2005-09-27 17:38:03 +08004692
Linus Torvalds1da177e2005-04-16 15:20:36 -07004693 ap->ops->tf_load(ap, &qc->tf); /* load tf registers */
4694 ap->ops->bmdma_setup(qc); /* set up bmdma */
4695 ap->ops->bmdma_start(qc); /* initiate bmdma */
Albert Lee312f7da2005-09-27 17:38:03 +08004696 ap->hsm_task_state = HSM_ST_LAST;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004697 break;
4698
Albert Lee312f7da2005-09-27 17:38:03 +08004699 case ATA_PROT_PIO:
4700 if (qc->tf.flags & ATA_TFLAG_POLLING)
4701 ata_qc_set_polling(qc);
4702
Jeff Garzike5338252005-10-30 21:37:17 -05004703 ata_tf_to_host(ap, &qc->tf);
Albert Lee312f7da2005-09-27 17:38:03 +08004704
Albert Lee54f00382005-09-30 19:14:19 +08004705 if (qc->tf.flags & ATA_TFLAG_WRITE) {
4706 /* PIO data out protocol */
4707 ap->hsm_task_state = HSM_ST_FIRST;
Albert Lee31ce6da2006-04-03 18:31:44 +08004708 ata_port_queue_task(ap, ata_pio_task, qc, 0);
Albert Lee54f00382005-09-30 19:14:19 +08004709
4710 /* always send first data block using
Albert Leee27486d2005-11-01 19:24:49 +08004711 * the ata_pio_task() codepath.
Albert Lee54f00382005-09-30 19:14:19 +08004712 */
Albert Lee312f7da2005-09-27 17:38:03 +08004713 } else {
Albert Lee54f00382005-09-30 19:14:19 +08004714 /* PIO data in protocol */
4715 ap->hsm_task_state = HSM_ST;
Albert Lee312f7da2005-09-27 17:38:03 +08004716
Albert Lee54f00382005-09-30 19:14:19 +08004717 if (qc->tf.flags & ATA_TFLAG_POLLING)
Albert Lee31ce6da2006-04-03 18:31:44 +08004718 ata_port_queue_task(ap, ata_pio_task, qc, 0);
Albert Lee312f7da2005-09-27 17:38:03 +08004719
Albert Lee54f00382005-09-30 19:14:19 +08004720 /* if polling, ata_pio_task() handles the rest.
4721 * otherwise, interrupt handler takes over from here.
4722 */
Albert Lee312f7da2005-09-27 17:38:03 +08004723 }
4724
Linus Torvalds1da177e2005-04-16 15:20:36 -07004725 break;
4726
4727 case ATA_PROT_ATAPI:
Linus Torvalds1da177e2005-04-16 15:20:36 -07004728 case ATA_PROT_ATAPI_NODATA:
Albert Lee312f7da2005-09-27 17:38:03 +08004729 if (qc->tf.flags & ATA_TFLAG_POLLING)
4730 ata_qc_set_polling(qc);
4731
Jeff Garzike5338252005-10-30 21:37:17 -05004732 ata_tf_to_host(ap, &qc->tf);
Jeff Garzikf6ef65e2006-01-27 02:45:00 -05004733
Albert Lee312f7da2005-09-27 17:38:03 +08004734 ap->hsm_task_state = HSM_ST_FIRST;
4735
4736 /* send cdb by polling if no cdb interrupt */
4737 if ((!(qc->dev->flags & ATA_DFLAG_CDB_INTR)) ||
4738 (qc->tf.flags & ATA_TFLAG_POLLING))
Albert Lee31ce6da2006-04-03 18:31:44 +08004739 ata_port_queue_task(ap, ata_pio_task, qc, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004740 break;
4741
4742 case ATA_PROT_ATAPI_DMA:
Jeff Garzik587005d2006-02-11 18:17:32 -05004743 WARN_ON(qc->tf.flags & ATA_TFLAG_POLLING);
Albert Lee312f7da2005-09-27 17:38:03 +08004744
Linus Torvalds1da177e2005-04-16 15:20:36 -07004745 ap->ops->tf_load(ap, &qc->tf); /* load tf registers */
4746 ap->ops->bmdma_setup(qc); /* set up bmdma */
Albert Lee312f7da2005-09-27 17:38:03 +08004747 ap->hsm_task_state = HSM_ST_FIRST;
4748
4749 /* send cdb by polling if no cdb interrupt */
4750 if (!(qc->dev->flags & ATA_DFLAG_CDB_INTR))
Albert Lee31ce6da2006-04-03 18:31:44 +08004751 ata_port_queue_task(ap, ata_pio_task, qc, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004752 break;
4753
4754 default:
4755 WARN_ON(1);
Tejun Heo9a3d9eb2006-01-23 13:09:36 +09004756 return AC_ERR_SYSTEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004757 }
4758
4759 return 0;
4760}
4761
4762/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07004763 * ata_host_intr - Handle host interrupt for given (port, task)
4764 * @ap: Port on which interrupt arrived (possibly...)
4765 * @qc: Taskfile currently active in engine
4766 *
4767 * Handle host interrupt for given queued command. Currently,
4768 * only DMA interrupts are handled. All other commands are
4769 * handled via polling with interrupts disabled (nIEN bit).
4770 *
4771 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04004772 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004773 *
4774 * RETURNS:
4775 * One if interrupt was handled, zero if not (shared irq).
4776 */
4777
4778inline unsigned int ata_host_intr (struct ata_port *ap,
4779 struct ata_queued_cmd *qc)
4780{
Albert Lee312f7da2005-09-27 17:38:03 +08004781 u8 status, host_stat = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004782
Albert Lee312f7da2005-09-27 17:38:03 +08004783 VPRINTK("ata%u: protocol %d task_state %d\n",
4784 ap->id, qc->tf.protocol, ap->hsm_task_state);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004785
Albert Lee312f7da2005-09-27 17:38:03 +08004786 /* Check whether we are expecting interrupt in this state */
4787 switch (ap->hsm_task_state) {
4788 case HSM_ST_FIRST:
Albert Lee6912ccd2006-03-25 17:45:49 +08004789 /* Some pre-ATAPI-4 devices assert INTRQ
4790 * at this state when ready to receive CDB.
4791 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07004792
Albert Lee312f7da2005-09-27 17:38:03 +08004793 /* Check the ATA_DFLAG_CDB_INTR flag is enough here.
4794 * The flag was turned on only for atapi devices.
4795 * No need to check is_atapi_taskfile(&qc->tf) again.
4796 */
4797 if (!(qc->dev->flags & ATA_DFLAG_CDB_INTR))
Linus Torvalds1da177e2005-04-16 15:20:36 -07004798 goto idle_irq;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004799 break;
Albert Lee312f7da2005-09-27 17:38:03 +08004800 case HSM_ST_LAST:
4801 if (qc->tf.protocol == ATA_PROT_DMA ||
4802 qc->tf.protocol == ATA_PROT_ATAPI_DMA) {
4803 /* check status of DMA engine */
4804 host_stat = ap->ops->bmdma_status(ap);
4805 VPRINTK("ata%u: host_stat 0x%X\n", ap->id, host_stat);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004806
Albert Lee312f7da2005-09-27 17:38:03 +08004807 /* if it's not our irq... */
4808 if (!(host_stat & ATA_DMA_INTR))
4809 goto idle_irq;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004810
Albert Lee312f7da2005-09-27 17:38:03 +08004811 /* before we do anything else, clear DMA-Start bit */
4812 ap->ops->bmdma_stop(qc);
Albert Leea4f16612005-12-26 16:40:53 +08004813
4814 if (unlikely(host_stat & ATA_DMA_ERR)) {
4815 /* error when transfering data to/from memory */
4816 qc->err_mask |= AC_ERR_HOST_BUS;
4817 ap->hsm_task_state = HSM_ST_ERR;
4818 }
Albert Lee312f7da2005-09-27 17:38:03 +08004819 }
4820 break;
4821 case HSM_ST:
4822 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004823 default:
4824 goto idle_irq;
4825 }
4826
Albert Lee312f7da2005-09-27 17:38:03 +08004827 /* check altstatus */
4828 status = ata_altstatus(ap);
4829 if (status & ATA_BUSY)
4830 goto idle_irq;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004831
Albert Lee312f7da2005-09-27 17:38:03 +08004832 /* check main status, clearing INTRQ */
4833 status = ata_chk_status(ap);
4834 if (unlikely(status & ATA_BUSY))
4835 goto idle_irq;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004836
Albert Lee312f7da2005-09-27 17:38:03 +08004837 /* ack bmdma irq events */
4838 ap->ops->irq_clear(ap);
4839
Albert Leebb5cb292006-03-25 17:48:02 +08004840 ata_hsm_move(ap, qc, status, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004841 return 1; /* irq handled */
4842
4843idle_irq:
4844 ap->stats.idle_irq++;
4845
4846#ifdef ATA_IRQ_TRAP
4847 if ((ap->stats.idle_irq % 1000) == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07004848 ata_irq_ack(ap, 0); /* debug trap */
Tejun Heof15a1da2006-05-15 20:57:56 +09004849 ata_port_printk(ap, KERN_WARNING, "irq trap\n");
Alan Cox23cfce82006-03-21 16:06:53 +00004850 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004851 }
4852#endif
4853 return 0; /* irq not handled */
4854}
4855
4856/**
4857 * ata_interrupt - Default ATA host interrupt handler
Jeff Garzik0cba6322005-05-30 19:49:12 -04004858 * @irq: irq line (unused)
Jeff Garzikcca39742006-08-24 03:19:22 -04004859 * @dev_instance: pointer to our ata_host information structure
Linus Torvalds1da177e2005-04-16 15:20:36 -07004860 * @regs: unused
4861 *
Jeff Garzik0cba6322005-05-30 19:49:12 -04004862 * Default interrupt handler for PCI IDE devices. Calls
4863 * ata_host_intr() for each port that is not disabled.
4864 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07004865 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04004866 * Obtains host lock during operation.
Linus Torvalds1da177e2005-04-16 15:20:36 -07004867 *
4868 * RETURNS:
Jeff Garzik0cba6322005-05-30 19:49:12 -04004869 * IRQ_NONE or IRQ_HANDLED.
Linus Torvalds1da177e2005-04-16 15:20:36 -07004870 */
4871
4872irqreturn_t ata_interrupt (int irq, void *dev_instance, struct pt_regs *regs)
4873{
Jeff Garzikcca39742006-08-24 03:19:22 -04004874 struct ata_host *host = dev_instance;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004875 unsigned int i;
4876 unsigned int handled = 0;
4877 unsigned long flags;
4878
4879 /* TODO: make _irqsave conditional on x86 PCI IDE legacy mode */
Jeff Garzikcca39742006-08-24 03:19:22 -04004880 spin_lock_irqsave(&host->lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004881
Jeff Garzikcca39742006-08-24 03:19:22 -04004882 for (i = 0; i < host->n_ports; i++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07004883 struct ata_port *ap;
4884
Jeff Garzikcca39742006-08-24 03:19:22 -04004885 ap = host->ports[i];
Tejun Heoc1389502005-08-22 14:59:24 +09004886 if (ap &&
Jeff Garzik029f5462006-04-02 10:30:40 -04004887 !(ap->flags & ATA_FLAG_DISABLED)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07004888 struct ata_queued_cmd *qc;
4889
4890 qc = ata_qc_from_tag(ap, ap->active_tag);
Albert Lee312f7da2005-09-27 17:38:03 +08004891 if (qc && (!(qc->tf.flags & ATA_TFLAG_POLLING)) &&
Albert Lee21b1ed72005-04-29 17:34:59 +08004892 (qc->flags & ATA_QCFLAG_ACTIVE))
Linus Torvalds1da177e2005-04-16 15:20:36 -07004893 handled |= ata_host_intr(ap, qc);
4894 }
4895 }
4896
Jeff Garzikcca39742006-08-24 03:19:22 -04004897 spin_unlock_irqrestore(&host->lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004898
4899 return IRQ_RETVAL(handled);
4900}
4901
Tejun Heo34bf2172006-05-15 20:57:46 +09004902/**
4903 * sata_scr_valid - test whether SCRs are accessible
4904 * @ap: ATA port to test SCR accessibility for
4905 *
4906 * Test whether SCRs are accessible for @ap.
4907 *
4908 * LOCKING:
4909 * None.
4910 *
4911 * RETURNS:
4912 * 1 if SCRs are accessible, 0 otherwise.
4913 */
4914int sata_scr_valid(struct ata_port *ap)
4915{
4916 return ap->cbl == ATA_CBL_SATA && ap->ops->scr_read;
4917}
4918
4919/**
4920 * sata_scr_read - read SCR register of the specified port
4921 * @ap: ATA port to read SCR for
4922 * @reg: SCR to read
4923 * @val: Place to store read value
4924 *
4925 * Read SCR register @reg of @ap into *@val. This function is
4926 * guaranteed to succeed if the cable type of the port is SATA
4927 * and the port implements ->scr_read.
4928 *
4929 * LOCKING:
4930 * None.
4931 *
4932 * RETURNS:
4933 * 0 on success, negative errno on failure.
4934 */
4935int sata_scr_read(struct ata_port *ap, int reg, u32 *val)
4936{
4937 if (sata_scr_valid(ap)) {
4938 *val = ap->ops->scr_read(ap, reg);
4939 return 0;
4940 }
4941 return -EOPNOTSUPP;
4942}
4943
4944/**
4945 * sata_scr_write - write SCR register of the specified port
4946 * @ap: ATA port to write SCR for
4947 * @reg: SCR to write
4948 * @val: value to write
4949 *
4950 * Write @val to SCR register @reg of @ap. This function is
4951 * guaranteed to succeed if the cable type of the port is SATA
4952 * and the port implements ->scr_read.
4953 *
4954 * LOCKING:
4955 * None.
4956 *
4957 * RETURNS:
4958 * 0 on success, negative errno on failure.
4959 */
4960int sata_scr_write(struct ata_port *ap, int reg, u32 val)
4961{
4962 if (sata_scr_valid(ap)) {
4963 ap->ops->scr_write(ap, reg, val);
4964 return 0;
4965 }
4966 return -EOPNOTSUPP;
4967}
4968
4969/**
4970 * sata_scr_write_flush - write SCR register of the specified port and flush
4971 * @ap: ATA port to write SCR for
4972 * @reg: SCR to write
4973 * @val: value to write
4974 *
4975 * This function is identical to sata_scr_write() except that this
4976 * function performs flush after writing to the register.
4977 *
4978 * LOCKING:
4979 * None.
4980 *
4981 * RETURNS:
4982 * 0 on success, negative errno on failure.
4983 */
4984int sata_scr_write_flush(struct ata_port *ap, int reg, u32 val)
4985{
4986 if (sata_scr_valid(ap)) {
4987 ap->ops->scr_write(ap, reg, val);
4988 ap->ops->scr_read(ap, reg);
4989 return 0;
4990 }
4991 return -EOPNOTSUPP;
4992}
4993
4994/**
4995 * ata_port_online - test whether the given port is online
4996 * @ap: ATA port to test
4997 *
4998 * Test whether @ap is online. Note that this function returns 0
4999 * if online status of @ap cannot be obtained, so
5000 * ata_port_online(ap) != !ata_port_offline(ap).
5001 *
5002 * LOCKING:
5003 * None.
5004 *
5005 * RETURNS:
5006 * 1 if the port online status is available and online.
5007 */
5008int ata_port_online(struct ata_port *ap)
5009{
5010 u32 sstatus;
5011
5012 if (!sata_scr_read(ap, SCR_STATUS, &sstatus) && (sstatus & 0xf) == 0x3)
5013 return 1;
5014 return 0;
5015}
5016
5017/**
5018 * ata_port_offline - test whether the given port is offline
5019 * @ap: ATA port to test
5020 *
5021 * Test whether @ap is offline. Note that this function returns
5022 * 0 if offline status of @ap cannot be obtained, so
5023 * ata_port_online(ap) != !ata_port_offline(ap).
5024 *
5025 * LOCKING:
5026 * None.
5027 *
5028 * RETURNS:
5029 * 1 if the port offline status is available and offline.
5030 */
5031int ata_port_offline(struct ata_port *ap)
5032{
5033 u32 sstatus;
5034
5035 if (!sata_scr_read(ap, SCR_STATUS, &sstatus) && (sstatus & 0xf) != 0x3)
5036 return 1;
5037 return 0;
5038}
Edward Falk0baab862005-06-02 18:17:13 -04005039
Tejun Heo77b08fb2006-06-24 20:30:19 +09005040int ata_flush_cache(struct ata_device *dev)
Jens Axboe9b847542006-01-06 09:28:07 +01005041{
Tejun Heo977e6b92006-06-24 20:30:19 +09005042 unsigned int err_mask;
Jens Axboe9b847542006-01-06 09:28:07 +01005043 u8 cmd;
5044
5045 if (!ata_try_flush_cache(dev))
5046 return 0;
5047
5048 if (ata_id_has_flush_ext(dev->id))
5049 cmd = ATA_CMD_FLUSH_EXT;
5050 else
5051 cmd = ATA_CMD_FLUSH;
5052
Tejun Heo977e6b92006-06-24 20:30:19 +09005053 err_mask = ata_do_simple_cmd(dev, cmd);
5054 if (err_mask) {
5055 ata_dev_printk(dev, KERN_ERR, "failed to flush cache\n");
5056 return -EIO;
5057 }
5058
5059 return 0;
Jens Axboe9b847542006-01-06 09:28:07 +01005060}
5061
Jeff Garzikcca39742006-08-24 03:19:22 -04005062static int ata_host_request_pm(struct ata_host *host, pm_message_t mesg,
5063 unsigned int action, unsigned int ehi_flags,
5064 int wait)
Tejun Heo500530f2006-07-03 16:07:27 +09005065{
5066 unsigned long flags;
5067 int i, rc;
5068
Jeff Garzikcca39742006-08-24 03:19:22 -04005069 for (i = 0; i < host->n_ports; i++) {
5070 struct ata_port *ap = host->ports[i];
Tejun Heo500530f2006-07-03 16:07:27 +09005071
5072 /* Previous resume operation might still be in
5073 * progress. Wait for PM_PENDING to clear.
5074 */
5075 if (ap->pflags & ATA_PFLAG_PM_PENDING) {
5076 ata_port_wait_eh(ap);
5077 WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING);
5078 }
5079
5080 /* request PM ops to EH */
5081 spin_lock_irqsave(ap->lock, flags);
5082
5083 ap->pm_mesg = mesg;
5084 if (wait) {
5085 rc = 0;
5086 ap->pm_result = &rc;
5087 }
5088
5089 ap->pflags |= ATA_PFLAG_PM_PENDING;
5090 ap->eh_info.action |= action;
5091 ap->eh_info.flags |= ehi_flags;
5092
5093 ata_port_schedule_eh(ap);
5094
5095 spin_unlock_irqrestore(ap->lock, flags);
5096
5097 /* wait and check result */
5098 if (wait) {
5099 ata_port_wait_eh(ap);
5100 WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING);
5101 if (rc)
5102 return rc;
5103 }
5104 }
5105
5106 return 0;
5107}
5108
5109/**
Jeff Garzikcca39742006-08-24 03:19:22 -04005110 * ata_host_suspend - suspend host
5111 * @host: host to suspend
Tejun Heo500530f2006-07-03 16:07:27 +09005112 * @mesg: PM message
5113 *
Jeff Garzikcca39742006-08-24 03:19:22 -04005114 * Suspend @host. Actual operation is performed by EH. This
Tejun Heo500530f2006-07-03 16:07:27 +09005115 * function requests EH to perform PM operations and waits for EH
5116 * to finish.
5117 *
5118 * LOCKING:
5119 * Kernel thread context (may sleep).
5120 *
5121 * RETURNS:
5122 * 0 on success, -errno on failure.
5123 */
Jeff Garzikcca39742006-08-24 03:19:22 -04005124int ata_host_suspend(struct ata_host *host, pm_message_t mesg)
Tejun Heo500530f2006-07-03 16:07:27 +09005125{
5126 int i, j, rc;
5127
Jeff Garzikcca39742006-08-24 03:19:22 -04005128 rc = ata_host_request_pm(host, mesg, 0, ATA_EHI_QUIET, 1);
Tejun Heo500530f2006-07-03 16:07:27 +09005129 if (rc)
5130 goto fail;
5131
5132 /* EH is quiescent now. Fail if we have any ready device.
5133 * This happens if hotplug occurs between completion of device
5134 * suspension and here.
5135 */
Jeff Garzikcca39742006-08-24 03:19:22 -04005136 for (i = 0; i < host->n_ports; i++) {
5137 struct ata_port *ap = host->ports[i];
Tejun Heo500530f2006-07-03 16:07:27 +09005138
5139 for (j = 0; j < ATA_MAX_DEVICES; j++) {
5140 struct ata_device *dev = &ap->device[j];
5141
5142 if (ata_dev_ready(dev)) {
5143 ata_port_printk(ap, KERN_WARNING,
5144 "suspend failed, device %d "
5145 "still active\n", dev->devno);
5146 rc = -EBUSY;
5147 goto fail;
5148 }
5149 }
5150 }
5151
Jeff Garzikcca39742006-08-24 03:19:22 -04005152 host->dev->power.power_state = mesg;
Tejun Heo500530f2006-07-03 16:07:27 +09005153 return 0;
5154
5155 fail:
Jeff Garzikcca39742006-08-24 03:19:22 -04005156 ata_host_resume(host);
Tejun Heo500530f2006-07-03 16:07:27 +09005157 return rc;
5158}
5159
5160/**
Jeff Garzikcca39742006-08-24 03:19:22 -04005161 * ata_host_resume - resume host
5162 * @host: host to resume
Tejun Heo500530f2006-07-03 16:07:27 +09005163 *
Jeff Garzikcca39742006-08-24 03:19:22 -04005164 * Resume @host. Actual operation is performed by EH. This
Tejun Heo500530f2006-07-03 16:07:27 +09005165 * function requests EH to perform PM operations and returns.
5166 * Note that all resume operations are performed parallely.
5167 *
5168 * LOCKING:
5169 * Kernel thread context (may sleep).
5170 */
Jeff Garzikcca39742006-08-24 03:19:22 -04005171void ata_host_resume(struct ata_host *host)
Tejun Heo500530f2006-07-03 16:07:27 +09005172{
Jeff Garzikcca39742006-08-24 03:19:22 -04005173 ata_host_request_pm(host, PMSG_ON, ATA_EH_SOFTRESET,
5174 ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET, 0);
5175 host->dev->power.power_state = PMSG_ON;
Tejun Heo500530f2006-07-03 16:07:27 +09005176}
5177
Randy Dunlapc893a3a2006-01-28 13:15:32 -05005178/**
5179 * ata_port_start - Set port up for dma.
5180 * @ap: Port to initialize
5181 *
5182 * Called just after data structures for each port are
5183 * initialized. Allocates space for PRD table.
5184 *
5185 * May be used as the port_start() entry in ata_port_operations.
5186 *
5187 * LOCKING:
5188 * Inherited from caller.
5189 */
5190
Linus Torvalds1da177e2005-04-16 15:20:36 -07005191int ata_port_start (struct ata_port *ap)
5192{
Brian King2f1f6102006-03-23 17:30:15 -06005193 struct device *dev = ap->dev;
Jeff Garzik6037d6b2005-11-04 22:08:00 -05005194 int rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005195
5196 ap->prd = dma_alloc_coherent(dev, ATA_PRD_TBL_SZ, &ap->prd_dma, GFP_KERNEL);
5197 if (!ap->prd)
5198 return -ENOMEM;
5199
Jeff Garzik6037d6b2005-11-04 22:08:00 -05005200 rc = ata_pad_alloc(ap, dev);
5201 if (rc) {
Jeff Garzikcedc9a42005-10-05 07:13:30 -04005202 dma_free_coherent(dev, ATA_PRD_TBL_SZ, ap->prd, ap->prd_dma);
Jeff Garzik6037d6b2005-11-04 22:08:00 -05005203 return rc;
Jeff Garzikcedc9a42005-10-05 07:13:30 -04005204 }
5205
Linus Torvalds1da177e2005-04-16 15:20:36 -07005206 DPRINTK("prd alloc, virt %p, dma %llx\n", ap->prd, (unsigned long long) ap->prd_dma);
5207
5208 return 0;
5209}
5210
Edward Falk0baab862005-06-02 18:17:13 -04005211
5212/**
5213 * ata_port_stop - Undo ata_port_start()
5214 * @ap: Port to shut down
5215 *
5216 * Frees the PRD table.
5217 *
5218 * May be used as the port_stop() entry in ata_port_operations.
5219 *
5220 * LOCKING:
Randy Dunlap6f0ef4f2005-10-25 01:44:30 -04005221 * Inherited from caller.
Edward Falk0baab862005-06-02 18:17:13 -04005222 */
5223
Linus Torvalds1da177e2005-04-16 15:20:36 -07005224void ata_port_stop (struct ata_port *ap)
5225{
Brian King2f1f6102006-03-23 17:30:15 -06005226 struct device *dev = ap->dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005227
5228 dma_free_coherent(dev, ATA_PRD_TBL_SZ, ap->prd, ap->prd_dma);
Jeff Garzik6037d6b2005-11-04 22:08:00 -05005229 ata_pad_free(ap, dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005230}
5231
Jeff Garzikcca39742006-08-24 03:19:22 -04005232void ata_host_stop (struct ata_host *host)
Jeff Garzikaa8f0dc2005-05-26 21:54:27 -04005233{
Jeff Garzikcca39742006-08-24 03:19:22 -04005234 if (host->mmio_base)
5235 iounmap(host->mmio_base);
Jeff Garzikaa8f0dc2005-05-26 21:54:27 -04005236}
5237
Linus Torvalds1da177e2005-04-16 15:20:36 -07005238/**
Tejun Heo3ef3b432006-05-31 18:27:30 +09005239 * ata_dev_init - Initialize an ata_device structure
5240 * @dev: Device structure to initialize
5241 *
5242 * Initialize @dev in preparation for probing.
5243 *
5244 * LOCKING:
5245 * Inherited from caller.
5246 */
5247void ata_dev_init(struct ata_device *dev)
5248{
5249 struct ata_port *ap = dev->ap;
Tejun Heo72fa4b72006-05-31 18:27:32 +09005250 unsigned long flags;
Tejun Heo3ef3b432006-05-31 18:27:30 +09005251
Tejun Heo5a04bf42006-05-31 18:27:38 +09005252 /* SATA spd limit is bound to the first device */
5253 ap->sata_spd_limit = ap->hw_sata_spd_limit;
5254
Tejun Heo72fa4b72006-05-31 18:27:32 +09005255 /* High bits of dev->flags are used to record warm plug
5256 * requests which occur asynchronously. Synchronize using
Jeff Garzikcca39742006-08-24 03:19:22 -04005257 * host lock.
Tejun Heo72fa4b72006-05-31 18:27:32 +09005258 */
Jeff Garzikba6a1302006-06-22 23:46:10 -04005259 spin_lock_irqsave(ap->lock, flags);
Tejun Heo72fa4b72006-05-31 18:27:32 +09005260 dev->flags &= ~ATA_DFLAG_INIT_MASK;
Jeff Garzikba6a1302006-06-22 23:46:10 -04005261 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heo72fa4b72006-05-31 18:27:32 +09005262
5263 memset((void *)dev + ATA_DEVICE_CLEAR_OFFSET, 0,
5264 sizeof(*dev) - ATA_DEVICE_CLEAR_OFFSET);
Tejun Heo3ef3b432006-05-31 18:27:30 +09005265 dev->pio_mask = UINT_MAX;
5266 dev->mwdma_mask = UINT_MAX;
5267 dev->udma_mask = UINT_MAX;
5268}
5269
5270/**
Brian King155a8a92006-08-07 14:27:17 -05005271 * ata_port_init - Initialize an ata_port structure
Linus Torvalds1da177e2005-04-16 15:20:36 -07005272 * @ap: Structure to initialize
Jeff Garzikcca39742006-08-24 03:19:22 -04005273 * @host: Collection of hosts to which @ap belongs
Linus Torvalds1da177e2005-04-16 15:20:36 -07005274 * @ent: Probe information provided by low-level driver
5275 * @port_no: Port number associated with this ata_port
5276 *
Brian King155a8a92006-08-07 14:27:17 -05005277 * Initialize a new ata_port structure.
Jeff Garzik0cba6322005-05-30 19:49:12 -04005278 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07005279 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04005280 * Inherited from caller.
Linus Torvalds1da177e2005-04-16 15:20:36 -07005281 */
Jeff Garzikcca39742006-08-24 03:19:22 -04005282void ata_port_init(struct ata_port *ap, struct ata_host *host,
Brian King155a8a92006-08-07 14:27:17 -05005283 const struct ata_probe_ent *ent, unsigned int port_no)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005284{
5285 unsigned int i;
5286
Jeff Garzikcca39742006-08-24 03:19:22 -04005287 ap->lock = &host->lock;
Tejun Heo198e0fe2006-04-02 18:51:52 +09005288 ap->flags = ATA_FLAG_DISABLED;
Brian King155a8a92006-08-07 14:27:17 -05005289 ap->id = ata_unique_id++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005290 ap->ctl = ATA_DEVCTL_OBS;
Jeff Garzikcca39742006-08-24 03:19:22 -04005291 ap->host = host;
Brian King2f1f6102006-03-23 17:30:15 -06005292 ap->dev = ent->dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005293 ap->port_no = port_no;
Tejun Heofea63e32006-09-16 03:04:15 +09005294 if (port_no == 1 && ent->pinfo2) {
5295 ap->pio_mask = ent->pinfo2->pio_mask;
5296 ap->mwdma_mask = ent->pinfo2->mwdma_mask;
5297 ap->udma_mask = ent->pinfo2->udma_mask;
5298 ap->flags |= ent->pinfo2->flags;
5299 ap->ops = ent->pinfo2->port_ops;
5300 } else {
5301 ap->pio_mask = ent->pio_mask;
5302 ap->mwdma_mask = ent->mwdma_mask;
5303 ap->udma_mask = ent->udma_mask;
5304 ap->flags |= ent->port_flags;
5305 ap->ops = ent->port_ops;
5306 }
Tejun Heo5a04bf42006-05-31 18:27:38 +09005307 ap->hw_sata_spd_limit = UINT_MAX;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005308 ap->active_tag = ATA_TAG_POISON;
5309 ap->last_ctl = 0xFF;
Borislav Petkovbd5d8252006-06-11 23:17:01 -04005310
5311#if defined(ATA_VERBOSE_DEBUG)
5312 /* turn on all debugging levels */
5313 ap->msg_enable = 0x00FF;
5314#elif defined(ATA_DEBUG)
5315 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 +09005316#else
Borislav Petkov0dd4b212006-06-23 02:29:08 -04005317 ap->msg_enable = ATA_MSG_DRV | ATA_MSG_ERR | ATA_MSG_WARN;
Borislav Petkovbd5d8252006-06-11 23:17:01 -04005318#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07005319
Tejun Heo86e45b62006-03-05 15:29:09 +09005320 INIT_WORK(&ap->port_task, NULL, NULL);
Tejun Heo580b2102006-05-31 18:28:05 +09005321 INIT_WORK(&ap->hotplug_task, ata_scsi_hotplug, ap);
zhao, forrest3057ac32006-06-12 12:01:34 +08005322 INIT_WORK(&ap->scsi_rescan_task, ata_scsi_dev_rescan, ap);
Tejun Heoa72ec4c2006-01-23 13:09:37 +09005323 INIT_LIST_HEAD(&ap->eh_done_q);
Tejun Heoc6cf9e92006-05-31 18:27:27 +09005324 init_waitqueue_head(&ap->eh_wait_q);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005325
Tejun Heo838df622006-05-15 20:57:44 +09005326 /* set cable type */
5327 ap->cbl = ATA_CBL_NONE;
5328 if (ap->flags & ATA_FLAG_SATA)
5329 ap->cbl = ATA_CBL_SATA;
5330
Tejun Heoacf356b2006-03-24 14:07:50 +09005331 for (i = 0; i < ATA_MAX_DEVICES; i++) {
5332 struct ata_device *dev = &ap->device[i];
Tejun Heo38d87232006-05-15 20:57:51 +09005333 dev->ap = ap;
Tejun Heo72fa4b72006-05-31 18:27:32 +09005334 dev->devno = i;
Tejun Heo3ef3b432006-05-31 18:27:30 +09005335 ata_dev_init(dev);
Tejun Heoacf356b2006-03-24 14:07:50 +09005336 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07005337
5338#ifdef ATA_IRQ_TRAP
5339 ap->stats.unhandled_irq = 1;
5340 ap->stats.idle_irq = 1;
5341#endif
5342
5343 memcpy(&ap->ioaddr, &ent->port[port_no], sizeof(struct ata_ioports));
5344}
5345
5346/**
Tejun Heo4608c162006-08-10 16:59:01 +09005347 * ata_port_init_shost - Initialize SCSI host associated with ATA port
5348 * @ap: ATA port to initialize SCSI host for
5349 * @shost: SCSI host associated with @ap
Brian King155a8a92006-08-07 14:27:17 -05005350 *
Tejun Heo4608c162006-08-10 16:59:01 +09005351 * Initialize SCSI host @shost associated with ATA port @ap.
Brian King155a8a92006-08-07 14:27:17 -05005352 *
5353 * LOCKING:
5354 * Inherited from caller.
5355 */
Tejun Heo4608c162006-08-10 16:59:01 +09005356static void ata_port_init_shost(struct ata_port *ap, struct Scsi_Host *shost)
Brian King155a8a92006-08-07 14:27:17 -05005357{
Jeff Garzikcca39742006-08-24 03:19:22 -04005358 ap->scsi_host = shost;
Brian King155a8a92006-08-07 14:27:17 -05005359
Tejun Heo4608c162006-08-10 16:59:01 +09005360 shost->unique_id = ap->id;
5361 shost->max_id = 16;
5362 shost->max_lun = 1;
5363 shost->max_channel = 1;
5364 shost->max_cmd_len = 12;
Brian King155a8a92006-08-07 14:27:17 -05005365}
5366
5367/**
Jeff Garzik996139f2006-08-10 16:59:03 +09005368 * ata_port_add - Attach low-level ATA driver to system
Linus Torvalds1da177e2005-04-16 15:20:36 -07005369 * @ent: Information provided by low-level driver
Jeff Garzikcca39742006-08-24 03:19:22 -04005370 * @host: Collections of ports to which we add
Linus Torvalds1da177e2005-04-16 15:20:36 -07005371 * @port_no: Port number associated with this host
5372 *
Jeff Garzik0cba6322005-05-30 19:49:12 -04005373 * Attach low-level ATA driver to system.
5374 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07005375 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04005376 * PCI/etc. bus probe sem.
Linus Torvalds1da177e2005-04-16 15:20:36 -07005377 *
5378 * RETURNS:
Jeff Garzik0cba6322005-05-30 19:49:12 -04005379 * New ata_port on success, for NULL on error.
Linus Torvalds1da177e2005-04-16 15:20:36 -07005380 */
Jeff Garzik996139f2006-08-10 16:59:03 +09005381static struct ata_port * ata_port_add(const struct ata_probe_ent *ent,
Jeff Garzikcca39742006-08-24 03:19:22 -04005382 struct ata_host *host,
Linus Torvalds1da177e2005-04-16 15:20:36 -07005383 unsigned int port_no)
5384{
Jeff Garzik996139f2006-08-10 16:59:03 +09005385 struct Scsi_Host *shost;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005386 struct ata_port *ap;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005387
5388 DPRINTK("ENTER\n");
Tejun Heoaec5c3c2006-03-25 01:33:34 +09005389
Tejun Heo52783c52006-05-31 18:28:22 +09005390 if (!ent->port_ops->error_handler &&
Jeff Garzikcca39742006-08-24 03:19:22 -04005391 !(ent->port_flags & (ATA_FLAG_SATA_RESET | ATA_FLAG_SRST))) {
Tejun Heoaec5c3c2006-03-25 01:33:34 +09005392 printk(KERN_ERR "ata%u: no reset mechanism available\n",
5393 port_no);
5394 return NULL;
5395 }
5396
Jeff Garzik996139f2006-08-10 16:59:03 +09005397 shost = scsi_host_alloc(ent->sht, sizeof(struct ata_port));
5398 if (!shost)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005399 return NULL;
5400
Jeff Garzik996139f2006-08-10 16:59:03 +09005401 shost->transportt = &ata_scsi_transport_template;
Tejun Heo30afc842006-03-18 18:40:14 +09005402
Jeff Garzik996139f2006-08-10 16:59:03 +09005403 ap = ata_shost_to_port(shost);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005404
Jeff Garzikcca39742006-08-24 03:19:22 -04005405 ata_port_init(ap, host, ent, port_no);
Jeff Garzik996139f2006-08-10 16:59:03 +09005406 ata_port_init_shost(ap, shost);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005407
Linus Torvalds1da177e2005-04-16 15:20:36 -07005408 return ap;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005409}
5410
5411/**
Jeff Garzikcca39742006-08-24 03:19:22 -04005412 * ata_sas_host_init - Initialize a host struct
5413 * @host: host to initialize
5414 * @dev: device host is attached to
5415 * @flags: host flags
5416 * @ops: port_ops
Brian Kingb03732f2006-08-07 14:27:10 -05005417 *
5418 * LOCKING:
5419 * PCI/etc. bus probe sem.
5420 *
5421 */
5422
Jeff Garzikcca39742006-08-24 03:19:22 -04005423void ata_host_init(struct ata_host *host, struct device *dev,
5424 unsigned long flags, const struct ata_port_operations *ops)
Brian Kingb03732f2006-08-07 14:27:10 -05005425{
Jeff Garzikcca39742006-08-24 03:19:22 -04005426 spin_lock_init(&host->lock);
5427 host->dev = dev;
5428 host->flags = flags;
5429 host->ops = ops;
Brian Kingb03732f2006-08-07 14:27:10 -05005430}
5431
5432/**
Jeff Garzik0cba6322005-05-30 19:49:12 -04005433 * ata_device_add - Register hardware device with ATA and SCSI layers
5434 * @ent: Probe information describing hardware device to be registered
5435 *
5436 * This function processes the information provided in the probe
5437 * information struct @ent, allocates the necessary ATA and SCSI
5438 * host information structures, initializes them, and registers
5439 * everything with requisite kernel subsystems.
5440 *
5441 * This function requests irqs, probes the ATA bus, and probes
5442 * the SCSI bus.
Linus Torvalds1da177e2005-04-16 15:20:36 -07005443 *
5444 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04005445 * PCI/etc. bus probe sem.
Linus Torvalds1da177e2005-04-16 15:20:36 -07005446 *
5447 * RETURNS:
Jeff Garzik0cba6322005-05-30 19:49:12 -04005448 * Number of ports registered. Zero on error (no ports registered).
Linus Torvalds1da177e2005-04-16 15:20:36 -07005449 */
Jeff Garzik057ace52005-10-22 14:27:05 -04005450int ata_device_add(const struct ata_probe_ent *ent)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005451{
Jeff Garzik6d0500d2006-08-10 16:59:05 +09005452 unsigned int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005453 struct device *dev = ent->dev;
Jeff Garzikcca39742006-08-24 03:19:22 -04005454 struct ata_host *host;
Jeff Garzik39b07ce2006-06-11 23:59:44 -04005455 int rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005456
5457 DPRINTK("ENTER\n");
Alan Cox02f076a2006-09-26 17:35:32 +01005458
5459 if (ent->irq == 0) {
5460 dev_printk(KERN_ERR, dev, "is not available: No interrupt assigned.\n");
5461 return 0;
5462 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07005463 /* alloc a container for our list of ATA ports (buses) */
Jeff Garzikcca39742006-08-24 03:19:22 -04005464 host = kzalloc(sizeof(struct ata_host) +
5465 (ent->n_ports * sizeof(void *)), GFP_KERNEL);
5466 if (!host)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005467 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005468
Jeff Garzikcca39742006-08-24 03:19:22 -04005469 ata_host_init(host, dev, ent->_host_flags, ent->port_ops);
5470 host->n_ports = ent->n_ports;
5471 host->irq = ent->irq;
5472 host->irq2 = ent->irq2;
5473 host->mmio_base = ent->mmio_base;
5474 host->private_data = ent->private_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005475
5476 /* register each port bound to this device */
Jeff Garzikcca39742006-08-24 03:19:22 -04005477 for (i = 0; i < host->n_ports; i++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07005478 struct ata_port *ap;
5479 unsigned long xfer_mode_mask;
Alan Cox2ec7df02006-08-10 16:59:10 +09005480 int irq_line = ent->irq;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005481
Jeff Garzikcca39742006-08-24 03:19:22 -04005482 ap = ata_port_add(ent, host, i);
Dave Jonesc38778c2006-09-26 23:52:50 -07005483 host->ports[i] = ap;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005484 if (!ap)
5485 goto err_out;
5486
Tejun Heodd5b06c2006-08-10 16:59:12 +09005487 /* dummy? */
5488 if (ent->dummy_port_mask & (1 << i)) {
5489 ata_port_printk(ap, KERN_INFO, "DUMMY\n");
5490 ap->ops = &ata_dummy_port_ops;
5491 continue;
5492 }
5493
5494 /* start port */
5495 rc = ap->ops->port_start(ap);
5496 if (rc) {
Jeff Garzikcca39742006-08-24 03:19:22 -04005497 host->ports[i] = NULL;
5498 scsi_host_put(ap->scsi_host);
Tejun Heodd5b06c2006-08-10 16:59:12 +09005499 goto err_out;
5500 }
5501
Alan Cox2ec7df02006-08-10 16:59:10 +09005502 /* Report the secondary IRQ for second channel legacy */
5503 if (i == 1 && ent->irq2)
5504 irq_line = ent->irq2;
5505
Linus Torvalds1da177e2005-04-16 15:20:36 -07005506 xfer_mode_mask =(ap->udma_mask << ATA_SHIFT_UDMA) |
5507 (ap->mwdma_mask << ATA_SHIFT_MWDMA) |
5508 (ap->pio_mask << ATA_SHIFT_PIO);
5509
5510 /* print per-port info to dmesg */
Tejun Heof15a1da2006-05-15 20:57:56 +09005511 ata_port_printk(ap, KERN_INFO, "%cATA max %s cmd 0x%lX "
Alan Cox2ec7df02006-08-10 16:59:10 +09005512 "ctl 0x%lX bmdma 0x%lX irq %d\n",
Tejun Heof15a1da2006-05-15 20:57:56 +09005513 ap->flags & ATA_FLAG_SATA ? 'S' : 'P',
5514 ata_mode_string(xfer_mode_mask),
5515 ap->ioaddr.cmd_addr,
5516 ap->ioaddr.ctl_addr,
5517 ap->ioaddr.bmdma_addr,
Alan Cox2ec7df02006-08-10 16:59:10 +09005518 irq_line);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005519
5520 ata_chk_status(ap);
Jeff Garzikcca39742006-08-24 03:19:22 -04005521 host->ops->irq_clear(ap);
Tejun Heoe3180492006-05-15 20:58:09 +09005522 ata_eh_freeze_port(ap); /* freeze port before requesting IRQ */
Linus Torvalds1da177e2005-04-16 15:20:36 -07005523 }
5524
Alan Cox2ec7df02006-08-10 16:59:10 +09005525 /* obtain irq, that may be shared between channels */
Jeff Garzik39b07ce2006-06-11 23:59:44 -04005526 rc = request_irq(ent->irq, ent->port_ops->irq_handler, ent->irq_flags,
Jeff Garzikcca39742006-08-24 03:19:22 -04005527 DRV_NAME, host);
Jeff Garzik39b07ce2006-06-11 23:59:44 -04005528 if (rc) {
5529 dev_printk(KERN_ERR, dev, "irq %lu request failed: %d\n",
5530 ent->irq, rc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005531 goto err_out;
Jeff Garzik39b07ce2006-06-11 23:59:44 -04005532 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07005533
Alan Cox2ec7df02006-08-10 16:59:10 +09005534 /* do we have a second IRQ for the other channel, eg legacy mode */
5535 if (ent->irq2) {
5536 /* We will get weird core code crashes later if this is true
5537 so trap it now */
5538 BUG_ON(ent->irq == ent->irq2);
5539
5540 rc = request_irq(ent->irq2, ent->port_ops->irq_handler, ent->irq_flags,
Jeff Garzikcca39742006-08-24 03:19:22 -04005541 DRV_NAME, host);
Alan Cox2ec7df02006-08-10 16:59:10 +09005542 if (rc) {
5543 dev_printk(KERN_ERR, dev, "irq %lu request failed: %d\n",
5544 ent->irq2, rc);
5545 goto err_out_free_irq;
5546 }
5547 }
5548
Linus Torvalds1da177e2005-04-16 15:20:36 -07005549 /* perform each probe synchronously */
5550 DPRINTK("probe begin\n");
Jeff Garzikcca39742006-08-24 03:19:22 -04005551 for (i = 0; i < host->n_ports; i++) {
5552 struct ata_port *ap = host->ports[i];
Tejun Heo5a04bf42006-05-31 18:27:38 +09005553 u32 scontrol;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005554 int rc;
5555
Tejun Heo5a04bf42006-05-31 18:27:38 +09005556 /* init sata_spd_limit to the current value */
5557 if (sata_scr_read(ap, SCR_CONTROL, &scontrol) == 0) {
5558 int spd = (scontrol >> 4) & 0xf;
5559 ap->hw_sata_spd_limit &= (1 << spd) - 1;
5560 }
5561 ap->sata_spd_limit = ap->hw_sata_spd_limit;
5562
Jeff Garzikcca39742006-08-24 03:19:22 -04005563 rc = scsi_add_host(ap->scsi_host, dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005564 if (rc) {
Tejun Heof15a1da2006-05-15 20:57:56 +09005565 ata_port_printk(ap, KERN_ERR, "scsi_add_host failed\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07005566 /* FIXME: do something useful here */
5567 /* FIXME: handle unconditional calls to
5568 * scsi_scan_host and ata_host_remove, below,
5569 * at the very least
5570 */
5571 }
Tejun Heo3e706392006-05-31 18:28:11 +09005572
Tejun Heo52783c52006-05-31 18:28:22 +09005573 if (ap->ops->error_handler) {
Tejun Heo1cdaf532006-07-03 16:07:26 +09005574 struct ata_eh_info *ehi = &ap->eh_info;
Tejun Heo3e706392006-05-31 18:28:11 +09005575 unsigned long flags;
5576
5577 ata_port_probe(ap);
5578
5579 /* kick EH for boot probing */
Jeff Garzikba6a1302006-06-22 23:46:10 -04005580 spin_lock_irqsave(ap->lock, flags);
Tejun Heo3e706392006-05-31 18:28:11 +09005581
Tejun Heo1cdaf532006-07-03 16:07:26 +09005582 ehi->probe_mask = (1 << ATA_MAX_DEVICES) - 1;
5583 ehi->action |= ATA_EH_SOFTRESET;
5584 ehi->flags |= ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET;
Tejun Heo3e706392006-05-31 18:28:11 +09005585
Tejun Heob51e9e52006-06-29 01:29:30 +09005586 ap->pflags |= ATA_PFLAG_LOADING;
Tejun Heo3e706392006-05-31 18:28:11 +09005587 ata_port_schedule_eh(ap);
5588
Jeff Garzikba6a1302006-06-22 23:46:10 -04005589 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heo3e706392006-05-31 18:28:11 +09005590
5591 /* wait for EH to finish */
5592 ata_port_wait_eh(ap);
5593 } else {
5594 DPRINTK("ata%u: bus probe begin\n", ap->id);
5595 rc = ata_bus_probe(ap);
5596 DPRINTK("ata%u: bus probe end\n", ap->id);
5597
5598 if (rc) {
5599 /* FIXME: do something useful here?
5600 * Current libata behavior will
5601 * tear down everything when
5602 * the module is removed
5603 * or the h/w is unplugged.
5604 */
5605 }
5606 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07005607 }
5608
5609 /* probes are done, now scan each port's disk(s) */
Randy Dunlapc893a3a2006-01-28 13:15:32 -05005610 DPRINTK("host probe begin\n");
Jeff Garzikcca39742006-08-24 03:19:22 -04005611 for (i = 0; i < host->n_ports; i++) {
5612 struct ata_port *ap = host->ports[i];
Linus Torvalds1da177e2005-04-16 15:20:36 -07005613
Jeff Garzik644dd0c2005-10-03 15:55:19 -04005614 ata_scsi_scan_host(ap);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005615 }
5616
Jeff Garzikcca39742006-08-24 03:19:22 -04005617 dev_set_drvdata(dev, host);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005618
5619 VPRINTK("EXIT, returning %u\n", ent->n_ports);
5620 return ent->n_ports; /* success */
5621
Alan Cox2ec7df02006-08-10 16:59:10 +09005622err_out_free_irq:
Jeff Garzikcca39742006-08-24 03:19:22 -04005623 free_irq(ent->irq, host);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005624err_out:
Jeff Garzikcca39742006-08-24 03:19:22 -04005625 for (i = 0; i < host->n_ports; i++) {
5626 struct ata_port *ap = host->ports[i];
Tejun Heo77f3f872006-08-05 03:59:19 +09005627 if (ap) {
5628 ap->ops->port_stop(ap);
Jeff Garzikcca39742006-08-24 03:19:22 -04005629 scsi_host_put(ap->scsi_host);
Tejun Heo77f3f872006-08-05 03:59:19 +09005630 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07005631 }
Jeff Garzik6d0500d2006-08-10 16:59:05 +09005632
Jeff Garzikcca39742006-08-24 03:19:22 -04005633 kfree(host);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005634 VPRINTK("EXIT, returning 0\n");
5635 return 0;
5636}
5637
5638/**
Tejun Heo720ba122006-05-31 18:28:13 +09005639 * ata_port_detach - Detach ATA port in prepration of device removal
5640 * @ap: ATA port to be detached
5641 *
5642 * Detach all ATA devices and the associated SCSI devices of @ap;
5643 * then, remove the associated SCSI host. @ap is guaranteed to
5644 * be quiescent on return from this function.
5645 *
5646 * LOCKING:
5647 * Kernel thread context (may sleep).
5648 */
5649void ata_port_detach(struct ata_port *ap)
5650{
5651 unsigned long flags;
5652 int i;
5653
5654 if (!ap->ops->error_handler)
Tejun Heoc3cf30a2006-08-05 03:59:11 +09005655 goto skip_eh;
Tejun Heo720ba122006-05-31 18:28:13 +09005656
5657 /* tell EH we're leaving & flush EH */
Jeff Garzikba6a1302006-06-22 23:46:10 -04005658 spin_lock_irqsave(ap->lock, flags);
Tejun Heob51e9e52006-06-29 01:29:30 +09005659 ap->pflags |= ATA_PFLAG_UNLOADING;
Jeff Garzikba6a1302006-06-22 23:46:10 -04005660 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heo720ba122006-05-31 18:28:13 +09005661
5662 ata_port_wait_eh(ap);
5663
5664 /* EH is now guaranteed to see UNLOADING, so no new device
5665 * will be attached. Disable all existing devices.
5666 */
Jeff Garzikba6a1302006-06-22 23:46:10 -04005667 spin_lock_irqsave(ap->lock, flags);
Tejun Heo720ba122006-05-31 18:28:13 +09005668
5669 for (i = 0; i < ATA_MAX_DEVICES; i++)
5670 ata_dev_disable(&ap->device[i]);
5671
Jeff Garzikba6a1302006-06-22 23:46:10 -04005672 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heo720ba122006-05-31 18:28:13 +09005673
5674 /* Final freeze & EH. All in-flight commands are aborted. EH
5675 * will be skipped and retrials will be terminated with bad
5676 * target.
5677 */
Jeff Garzikba6a1302006-06-22 23:46:10 -04005678 spin_lock_irqsave(ap->lock, flags);
Tejun Heo720ba122006-05-31 18:28:13 +09005679 ata_port_freeze(ap); /* won't be thawed */
Jeff Garzikba6a1302006-06-22 23:46:10 -04005680 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heo720ba122006-05-31 18:28:13 +09005681
5682 ata_port_wait_eh(ap);
5683
5684 /* Flush hotplug task. The sequence is similar to
5685 * ata_port_flush_task().
5686 */
5687 flush_workqueue(ata_aux_wq);
5688 cancel_delayed_work(&ap->hotplug_task);
5689 flush_workqueue(ata_aux_wq);
5690
Tejun Heoc3cf30a2006-08-05 03:59:11 +09005691 skip_eh:
Tejun Heo720ba122006-05-31 18:28:13 +09005692 /* remove the associated SCSI host */
Jeff Garzikcca39742006-08-24 03:19:22 -04005693 scsi_remove_host(ap->scsi_host);
Tejun Heo720ba122006-05-31 18:28:13 +09005694}
5695
5696/**
Jeff Garzikcca39742006-08-24 03:19:22 -04005697 * ata_host_remove - PCI layer callback for device removal
5698 * @host: ATA host set that was removed
Alan Cox17b14452005-09-15 15:44:00 +01005699 *
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05005700 * Unregister all objects associated with this host set. Free those
Alan Cox17b14452005-09-15 15:44:00 +01005701 * objects.
5702 *
5703 * LOCKING:
5704 * Inherited from calling layer (may sleep).
5705 */
5706
Jeff Garzikcca39742006-08-24 03:19:22 -04005707void ata_host_remove(struct ata_host *host)
Alan Cox17b14452005-09-15 15:44:00 +01005708{
Alan Cox17b14452005-09-15 15:44:00 +01005709 unsigned int i;
5710
Jeff Garzikcca39742006-08-24 03:19:22 -04005711 for (i = 0; i < host->n_ports; i++)
5712 ata_port_detach(host->ports[i]);
Alan Cox17b14452005-09-15 15:44:00 +01005713
Jeff Garzikcca39742006-08-24 03:19:22 -04005714 free_irq(host->irq, host);
5715 if (host->irq2)
5716 free_irq(host->irq2, host);
Alan Cox17b14452005-09-15 15:44:00 +01005717
Jeff Garzikcca39742006-08-24 03:19:22 -04005718 for (i = 0; i < host->n_ports; i++) {
5719 struct ata_port *ap = host->ports[i];
Alan Cox17b14452005-09-15 15:44:00 +01005720
Jeff Garzikcca39742006-08-24 03:19:22 -04005721 ata_scsi_release(ap->scsi_host);
Alan Cox17b14452005-09-15 15:44:00 +01005722
5723 if ((ap->flags & ATA_FLAG_NO_LEGACY) == 0) {
5724 struct ata_ioports *ioaddr = &ap->ioaddr;
5725
Alan Cox2ec7df02006-08-10 16:59:10 +09005726 /* FIXME: Add -ac IDE pci mods to remove these special cases */
5727 if (ioaddr->cmd_addr == ATA_PRIMARY_CMD)
5728 release_region(ATA_PRIMARY_CMD, 8);
5729 else if (ioaddr->cmd_addr == ATA_SECONDARY_CMD)
5730 release_region(ATA_SECONDARY_CMD, 8);
Alan Cox17b14452005-09-15 15:44:00 +01005731 }
5732
Jeff Garzikcca39742006-08-24 03:19:22 -04005733 scsi_host_put(ap->scsi_host);
Alan Cox17b14452005-09-15 15:44:00 +01005734 }
5735
Jeff Garzikcca39742006-08-24 03:19:22 -04005736 if (host->ops->host_stop)
5737 host->ops->host_stop(host);
Alan Cox17b14452005-09-15 15:44:00 +01005738
Jeff Garzikcca39742006-08-24 03:19:22 -04005739 kfree(host);
Alan Cox17b14452005-09-15 15:44:00 +01005740}
5741
5742/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07005743 * ata_scsi_release - SCSI layer callback hook for host unload
5744 * @host: libata host to be unloaded
5745 *
5746 * Performs all duties necessary to shut down a libata port...
5747 * Kill port kthread, disable port, and release resources.
5748 *
5749 * LOCKING:
5750 * Inherited from SCSI layer.
5751 *
5752 * RETURNS:
5753 * One.
5754 */
5755
Jeff Garzikcca39742006-08-24 03:19:22 -04005756int ata_scsi_release(struct Scsi_Host *shost)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005757{
Jeff Garzikcca39742006-08-24 03:19:22 -04005758 struct ata_port *ap = ata_shost_to_port(shost);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005759
5760 DPRINTK("ENTER\n");
5761
5762 ap->ops->port_disable(ap);
Jeff Garzik6543bc02006-08-05 03:59:17 +09005763 ap->ops->port_stop(ap);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005764
5765 DPRINTK("EXIT\n");
5766 return 1;
5767}
5768
Brian Kingf6d950e2006-08-07 14:27:24 -05005769struct ata_probe_ent *
5770ata_probe_ent_alloc(struct device *dev, const struct ata_port_info *port)
5771{
5772 struct ata_probe_ent *probe_ent;
5773
5774 probe_ent = kzalloc(sizeof(*probe_ent), GFP_KERNEL);
5775 if (!probe_ent) {
5776 printk(KERN_ERR DRV_NAME "(%s): out of memory\n",
5777 kobject_name(&(dev->kobj)));
5778 return NULL;
5779 }
5780
5781 INIT_LIST_HEAD(&probe_ent->node);
5782 probe_ent->dev = dev;
5783
5784 probe_ent->sht = port->sht;
Jeff Garzikcca39742006-08-24 03:19:22 -04005785 probe_ent->port_flags = port->flags;
Brian Kingf6d950e2006-08-07 14:27:24 -05005786 probe_ent->pio_mask = port->pio_mask;
5787 probe_ent->mwdma_mask = port->mwdma_mask;
5788 probe_ent->udma_mask = port->udma_mask;
5789 probe_ent->port_ops = port->port_ops;
Jeff Garzikd639ca92006-09-28 03:48:18 -04005790 probe_ent->private_data = port->private_data;
Brian Kingf6d950e2006-08-07 14:27:24 -05005791
5792 return probe_ent;
5793}
5794
Linus Torvalds1da177e2005-04-16 15:20:36 -07005795/**
5796 * ata_std_ports - initialize ioaddr with standard port offsets.
5797 * @ioaddr: IO address structure to be initialized
Edward Falk0baab862005-06-02 18:17:13 -04005798 *
5799 * Utility function which initializes data_addr, error_addr,
5800 * feature_addr, nsect_addr, lbal_addr, lbam_addr, lbah_addr,
5801 * device_addr, status_addr, and command_addr to standard offsets
5802 * relative to cmd_addr.
5803 *
5804 * Does not set ctl_addr, altstatus_addr, bmdma_addr, or scr_addr.
Linus Torvalds1da177e2005-04-16 15:20:36 -07005805 */
Edward Falk0baab862005-06-02 18:17:13 -04005806
Linus Torvalds1da177e2005-04-16 15:20:36 -07005807void ata_std_ports(struct ata_ioports *ioaddr)
5808{
5809 ioaddr->data_addr = ioaddr->cmd_addr + ATA_REG_DATA;
5810 ioaddr->error_addr = ioaddr->cmd_addr + ATA_REG_ERR;
5811 ioaddr->feature_addr = ioaddr->cmd_addr + ATA_REG_FEATURE;
5812 ioaddr->nsect_addr = ioaddr->cmd_addr + ATA_REG_NSECT;
5813 ioaddr->lbal_addr = ioaddr->cmd_addr + ATA_REG_LBAL;
5814 ioaddr->lbam_addr = ioaddr->cmd_addr + ATA_REG_LBAM;
5815 ioaddr->lbah_addr = ioaddr->cmd_addr + ATA_REG_LBAH;
5816 ioaddr->device_addr = ioaddr->cmd_addr + ATA_REG_DEVICE;
5817 ioaddr->status_addr = ioaddr->cmd_addr + ATA_REG_STATUS;
5818 ioaddr->command_addr = ioaddr->cmd_addr + ATA_REG_CMD;
5819}
5820
Edward Falk0baab862005-06-02 18:17:13 -04005821
Jeff Garzik374b1872005-08-30 05:42:52 -04005822#ifdef CONFIG_PCI
5823
Jeff Garzikcca39742006-08-24 03:19:22 -04005824void ata_pci_host_stop (struct ata_host *host)
Jeff Garzik374b1872005-08-30 05:42:52 -04005825{
Jeff Garzikcca39742006-08-24 03:19:22 -04005826 struct pci_dev *pdev = to_pci_dev(host->dev);
Jeff Garzik374b1872005-08-30 05:42:52 -04005827
Jeff Garzikcca39742006-08-24 03:19:22 -04005828 pci_iounmap(pdev, host->mmio_base);
Jeff Garzik374b1872005-08-30 05:42:52 -04005829}
5830
Edward Falk0baab862005-06-02 18:17:13 -04005831/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07005832 * ata_pci_remove_one - PCI layer callback for device removal
5833 * @pdev: PCI device that was removed
5834 *
5835 * PCI layer indicates to libata via this hook that
Randy Dunlap6f0ef4f2005-10-25 01:44:30 -04005836 * hot-unplug or module unload event has occurred.
Linus Torvalds1da177e2005-04-16 15:20:36 -07005837 * Handle this by unregistering all objects associated
5838 * with this PCI device. Free those objects. Then finally
5839 * release PCI resources and disable device.
5840 *
5841 * LOCKING:
5842 * Inherited from PCI layer (may sleep).
5843 */
5844
5845void ata_pci_remove_one (struct pci_dev *pdev)
5846{
5847 struct device *dev = pci_dev_to_dev(pdev);
Jeff Garzikcca39742006-08-24 03:19:22 -04005848 struct ata_host *host = dev_get_drvdata(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005849
Jeff Garzikcca39742006-08-24 03:19:22 -04005850 ata_host_remove(host);
Tejun Heof0eb62b2006-06-12 23:05:38 +09005851
Linus Torvalds1da177e2005-04-16 15:20:36 -07005852 pci_release_regions(pdev);
5853 pci_disable_device(pdev);
5854 dev_set_drvdata(dev, NULL);
5855}
5856
5857/* move to PCI subsystem */
Jeff Garzik057ace52005-10-22 14:27:05 -04005858int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005859{
5860 unsigned long tmp = 0;
5861
5862 switch (bits->width) {
5863 case 1: {
5864 u8 tmp8 = 0;
5865 pci_read_config_byte(pdev, bits->reg, &tmp8);
5866 tmp = tmp8;
5867 break;
5868 }
5869 case 2: {
5870 u16 tmp16 = 0;
5871 pci_read_config_word(pdev, bits->reg, &tmp16);
5872 tmp = tmp16;
5873 break;
5874 }
5875 case 4: {
5876 u32 tmp32 = 0;
5877 pci_read_config_dword(pdev, bits->reg, &tmp32);
5878 tmp = tmp32;
5879 break;
5880 }
5881
5882 default:
5883 return -EINVAL;
5884 }
5885
5886 tmp &= bits->mask;
5887
5888 return (tmp == bits->val) ? 1 : 0;
5889}
Jens Axboe9b847542006-01-06 09:28:07 +01005890
Tejun Heo3c5100c2006-07-26 16:58:33 +09005891void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg)
Jens Axboe9b847542006-01-06 09:28:07 +01005892{
5893 pci_save_state(pdev);
Tejun Heo500530f2006-07-03 16:07:27 +09005894
Tejun Heo3c5100c2006-07-26 16:58:33 +09005895 if (mesg.event == PM_EVENT_SUSPEND) {
Tejun Heo500530f2006-07-03 16:07:27 +09005896 pci_disable_device(pdev);
5897 pci_set_power_state(pdev, PCI_D3hot);
5898 }
Jens Axboe9b847542006-01-06 09:28:07 +01005899}
5900
Tejun Heo500530f2006-07-03 16:07:27 +09005901void ata_pci_device_do_resume(struct pci_dev *pdev)
Jens Axboe9b847542006-01-06 09:28:07 +01005902{
5903 pci_set_power_state(pdev, PCI_D0);
5904 pci_restore_state(pdev);
5905 pci_enable_device(pdev);
5906 pci_set_master(pdev);
Tejun Heo500530f2006-07-03 16:07:27 +09005907}
5908
Tejun Heo3c5100c2006-07-26 16:58:33 +09005909int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg)
Tejun Heo500530f2006-07-03 16:07:27 +09005910{
Jeff Garzikcca39742006-08-24 03:19:22 -04005911 struct ata_host *host = dev_get_drvdata(&pdev->dev);
Tejun Heo500530f2006-07-03 16:07:27 +09005912 int rc = 0;
5913
Jeff Garzikcca39742006-08-24 03:19:22 -04005914 rc = ata_host_suspend(host, mesg);
Tejun Heo500530f2006-07-03 16:07:27 +09005915 if (rc)
5916 return rc;
5917
Tejun Heo3c5100c2006-07-26 16:58:33 +09005918 ata_pci_device_do_suspend(pdev, mesg);
Tejun Heo500530f2006-07-03 16:07:27 +09005919
5920 return 0;
5921}
5922
5923int ata_pci_device_resume(struct pci_dev *pdev)
5924{
Jeff Garzikcca39742006-08-24 03:19:22 -04005925 struct ata_host *host = dev_get_drvdata(&pdev->dev);
Tejun Heo500530f2006-07-03 16:07:27 +09005926
5927 ata_pci_device_do_resume(pdev);
Jeff Garzikcca39742006-08-24 03:19:22 -04005928 ata_host_resume(host);
Jens Axboe9b847542006-01-06 09:28:07 +01005929 return 0;
5930}
Linus Torvalds1da177e2005-04-16 15:20:36 -07005931#endif /* CONFIG_PCI */
5932
5933
Linus Torvalds1da177e2005-04-16 15:20:36 -07005934static int __init ata_init(void)
5935{
Andrew Mortona8601e52006-06-25 01:36:52 -07005936 ata_probe_timeout *= HZ;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005937 ata_wq = create_workqueue("ata");
5938 if (!ata_wq)
5939 return -ENOMEM;
5940
Tejun Heo453b07a2006-05-31 18:27:42 +09005941 ata_aux_wq = create_singlethread_workqueue("ata_aux");
5942 if (!ata_aux_wq) {
5943 destroy_workqueue(ata_wq);
5944 return -ENOMEM;
5945 }
5946
Linus Torvalds1da177e2005-04-16 15:20:36 -07005947 printk(KERN_DEBUG "libata version " DRV_VERSION " loaded.\n");
5948 return 0;
5949}
5950
5951static void __exit ata_exit(void)
5952{
5953 destroy_workqueue(ata_wq);
Tejun Heo453b07a2006-05-31 18:27:42 +09005954 destroy_workqueue(ata_aux_wq);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005955}
5956
5957module_init(ata_init);
5958module_exit(ata_exit);
5959
Jeff Garzik67846b32005-10-05 02:58:32 -04005960static unsigned long ratelimit_time;
Ingo Molnar34af9462006-06-27 02:53:55 -07005961static DEFINE_SPINLOCK(ata_ratelimit_lock);
Jeff Garzik67846b32005-10-05 02:58:32 -04005962
5963int ata_ratelimit(void)
5964{
5965 int rc;
5966 unsigned long flags;
5967
5968 spin_lock_irqsave(&ata_ratelimit_lock, flags);
5969
5970 if (time_after(jiffies, ratelimit_time)) {
5971 rc = 1;
5972 ratelimit_time = jiffies + (HZ/5);
5973 } else
5974 rc = 0;
5975
5976 spin_unlock_irqrestore(&ata_ratelimit_lock, flags);
5977
5978 return rc;
5979}
5980
Tejun Heoc22daff2006-04-11 22:22:29 +09005981/**
5982 * ata_wait_register - wait until register value changes
5983 * @reg: IO-mapped register
5984 * @mask: Mask to apply to read register value
5985 * @val: Wait condition
5986 * @interval_msec: polling interval in milliseconds
5987 * @timeout_msec: timeout in milliseconds
5988 *
5989 * Waiting for some bits of register to change is a common
5990 * operation for ATA controllers. This function reads 32bit LE
5991 * IO-mapped register @reg and tests for the following condition.
5992 *
5993 * (*@reg & mask) != val
5994 *
5995 * If the condition is met, it returns; otherwise, the process is
5996 * repeated after @interval_msec until timeout.
5997 *
5998 * LOCKING:
5999 * Kernel thread context (may sleep)
6000 *
6001 * RETURNS:
6002 * The final register value.
6003 */
6004u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val,
6005 unsigned long interval_msec,
6006 unsigned long timeout_msec)
6007{
6008 unsigned long timeout;
6009 u32 tmp;
6010
6011 tmp = ioread32(reg);
6012
6013 /* Calculate timeout _after_ the first read to make sure
6014 * preceding writes reach the controller before starting to
6015 * eat away the timeout.
6016 */
6017 timeout = jiffies + (timeout_msec * HZ) / 1000;
6018
6019 while ((tmp & mask) == val && time_before(jiffies, timeout)) {
6020 msleep(interval_msec);
6021 tmp = ioread32(reg);
6022 }
6023
6024 return tmp;
6025}
6026
Linus Torvalds1da177e2005-04-16 15:20:36 -07006027/*
Tejun Heodd5b06c2006-08-10 16:59:12 +09006028 * Dummy port_ops
6029 */
6030static void ata_dummy_noret(struct ata_port *ap) { }
6031static int ata_dummy_ret0(struct ata_port *ap) { return 0; }
6032static void ata_dummy_qc_noret(struct ata_queued_cmd *qc) { }
6033
6034static u8 ata_dummy_check_status(struct ata_port *ap)
6035{
6036 return ATA_DRDY;
6037}
6038
6039static unsigned int ata_dummy_qc_issue(struct ata_queued_cmd *qc)
6040{
6041 return AC_ERR_SYSTEM;
6042}
6043
6044const struct ata_port_operations ata_dummy_port_ops = {
6045 .port_disable = ata_port_disable,
6046 .check_status = ata_dummy_check_status,
6047 .check_altstatus = ata_dummy_check_status,
6048 .dev_select = ata_noop_dev_select,
6049 .qc_prep = ata_noop_qc_prep,
6050 .qc_issue = ata_dummy_qc_issue,
6051 .freeze = ata_dummy_noret,
6052 .thaw = ata_dummy_noret,
6053 .error_handler = ata_dummy_noret,
6054 .post_internal_cmd = ata_dummy_qc_noret,
6055 .irq_clear = ata_dummy_noret,
6056 .port_start = ata_dummy_ret0,
6057 .port_stop = ata_dummy_noret,
6058};
6059
6060/*
Linus Torvalds1da177e2005-04-16 15:20:36 -07006061 * libata is essentially a library of internal helper functions for
6062 * low-level ATA host controller drivers. As such, the API/ABI is
6063 * likely to change as new drivers are added and updated.
6064 * Do not depend on ABI/API stability.
6065 */
6066
Tejun Heoe9c83912006-07-03 16:07:26 +09006067EXPORT_SYMBOL_GPL(sata_deb_timing_normal);
6068EXPORT_SYMBOL_GPL(sata_deb_timing_hotplug);
6069EXPORT_SYMBOL_GPL(sata_deb_timing_long);
Tejun Heodd5b06c2006-08-10 16:59:12 +09006070EXPORT_SYMBOL_GPL(ata_dummy_port_ops);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006071EXPORT_SYMBOL_GPL(ata_std_bios_param);
6072EXPORT_SYMBOL_GPL(ata_std_ports);
Jeff Garzikcca39742006-08-24 03:19:22 -04006073EXPORT_SYMBOL_GPL(ata_host_init);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006074EXPORT_SYMBOL_GPL(ata_device_add);
Tejun Heo720ba122006-05-31 18:28:13 +09006075EXPORT_SYMBOL_GPL(ata_port_detach);
Jeff Garzikcca39742006-08-24 03:19:22 -04006076EXPORT_SYMBOL_GPL(ata_host_remove);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006077EXPORT_SYMBOL_GPL(ata_sg_init);
6078EXPORT_SYMBOL_GPL(ata_sg_init_one);
Tejun Heo9a1004d2006-05-31 18:27:52 +09006079EXPORT_SYMBOL_GPL(ata_hsm_move);
Tejun Heof686bcb2006-05-15 20:58:05 +09006080EXPORT_SYMBOL_GPL(ata_qc_complete);
Tejun Heodedaf2b2006-05-15 21:03:43 +09006081EXPORT_SYMBOL_GPL(ata_qc_complete_multiple);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006082EXPORT_SYMBOL_GPL(ata_qc_issue_prot);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006083EXPORT_SYMBOL_GPL(ata_tf_load);
6084EXPORT_SYMBOL_GPL(ata_tf_read);
6085EXPORT_SYMBOL_GPL(ata_noop_dev_select);
6086EXPORT_SYMBOL_GPL(ata_std_dev_select);
6087EXPORT_SYMBOL_GPL(ata_tf_to_fis);
6088EXPORT_SYMBOL_GPL(ata_tf_from_fis);
6089EXPORT_SYMBOL_GPL(ata_check_status);
6090EXPORT_SYMBOL_GPL(ata_altstatus);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006091EXPORT_SYMBOL_GPL(ata_exec_command);
6092EXPORT_SYMBOL_GPL(ata_port_start);
6093EXPORT_SYMBOL_GPL(ata_port_stop);
Jeff Garzikaa8f0dc2005-05-26 21:54:27 -04006094EXPORT_SYMBOL_GPL(ata_host_stop);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006095EXPORT_SYMBOL_GPL(ata_interrupt);
Alan Coxa6b2c5d2006-05-22 16:59:59 +01006096EXPORT_SYMBOL_GPL(ata_mmio_data_xfer);
6097EXPORT_SYMBOL_GPL(ata_pio_data_xfer);
Alan Cox75e99582006-05-24 14:14:41 +01006098EXPORT_SYMBOL_GPL(ata_pio_data_xfer_noirq);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006099EXPORT_SYMBOL_GPL(ata_qc_prep);
Brian Kinge46834c2006-03-17 17:04:03 -06006100EXPORT_SYMBOL_GPL(ata_noop_qc_prep);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006101EXPORT_SYMBOL_GPL(ata_bmdma_setup);
6102EXPORT_SYMBOL_GPL(ata_bmdma_start);
6103EXPORT_SYMBOL_GPL(ata_bmdma_irq_clear);
6104EXPORT_SYMBOL_GPL(ata_bmdma_status);
6105EXPORT_SYMBOL_GPL(ata_bmdma_stop);
Tejun Heo6d97dbd2006-05-15 20:58:24 +09006106EXPORT_SYMBOL_GPL(ata_bmdma_freeze);
6107EXPORT_SYMBOL_GPL(ata_bmdma_thaw);
6108EXPORT_SYMBOL_GPL(ata_bmdma_drive_eh);
6109EXPORT_SYMBOL_GPL(ata_bmdma_error_handler);
6110EXPORT_SYMBOL_GPL(ata_bmdma_post_internal_cmd);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006111EXPORT_SYMBOL_GPL(ata_port_probe);
Tejun Heo3c567b72006-05-15 20:57:23 +09006112EXPORT_SYMBOL_GPL(sata_set_spd);
Tejun Heod7bb4cc2006-05-31 18:27:46 +09006113EXPORT_SYMBOL_GPL(sata_phy_debounce);
6114EXPORT_SYMBOL_GPL(sata_phy_resume);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006115EXPORT_SYMBOL_GPL(sata_phy_reset);
6116EXPORT_SYMBOL_GPL(__sata_phy_reset);
6117EXPORT_SYMBOL_GPL(ata_bus_reset);
Tejun Heof5914a42006-05-31 18:27:48 +09006118EXPORT_SYMBOL_GPL(ata_std_prereset);
Tejun Heoc2bd5802006-01-24 17:05:22 +09006119EXPORT_SYMBOL_GPL(ata_std_softreset);
6120EXPORT_SYMBOL_GPL(sata_std_hardreset);
6121EXPORT_SYMBOL_GPL(ata_std_postreset);
Tejun Heo623a3122006-03-05 17:55:58 +09006122EXPORT_SYMBOL_GPL(ata_dev_revalidate);
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05006123EXPORT_SYMBOL_GPL(ata_dev_classify);
6124EXPORT_SYMBOL_GPL(ata_dev_pair);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006125EXPORT_SYMBOL_GPL(ata_port_disable);
Jeff Garzik67846b32005-10-05 02:58:32 -04006126EXPORT_SYMBOL_GPL(ata_ratelimit);
Tejun Heoc22daff2006-04-11 22:22:29 +09006127EXPORT_SYMBOL_GPL(ata_wait_register);
Tejun Heo6f8b9952006-01-24 17:05:21 +09006128EXPORT_SYMBOL_GPL(ata_busy_sleep);
Tejun Heo86e45b62006-03-05 15:29:09 +09006129EXPORT_SYMBOL_GPL(ata_port_queue_task);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006130EXPORT_SYMBOL_GPL(ata_scsi_ioctl);
6131EXPORT_SYMBOL_GPL(ata_scsi_queuecmd);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006132EXPORT_SYMBOL_GPL(ata_scsi_slave_config);
Tejun Heo83c47bc2006-05-31 18:28:07 +09006133EXPORT_SYMBOL_GPL(ata_scsi_slave_destroy);
Tejun Heoa6e6ce82006-05-15 21:03:48 +09006134EXPORT_SYMBOL_GPL(ata_scsi_change_queue_depth);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006135EXPORT_SYMBOL_GPL(ata_scsi_release);
6136EXPORT_SYMBOL_GPL(ata_host_intr);
Tejun Heo34bf2172006-05-15 20:57:46 +09006137EXPORT_SYMBOL_GPL(sata_scr_valid);
6138EXPORT_SYMBOL_GPL(sata_scr_read);
6139EXPORT_SYMBOL_GPL(sata_scr_write);
6140EXPORT_SYMBOL_GPL(sata_scr_write_flush);
6141EXPORT_SYMBOL_GPL(ata_port_online);
6142EXPORT_SYMBOL_GPL(ata_port_offline);
Jeff Garzikcca39742006-08-24 03:19:22 -04006143EXPORT_SYMBOL_GPL(ata_host_suspend);
6144EXPORT_SYMBOL_GPL(ata_host_resume);
Tejun Heo6a62a042006-02-13 10:02:46 +09006145EXPORT_SYMBOL_GPL(ata_id_string);
6146EXPORT_SYMBOL_GPL(ata_id_c_string);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006147EXPORT_SYMBOL_GPL(ata_scsi_simulate);
6148
Alan Cox1bc4ccf2006-01-09 17:18:14 +00006149EXPORT_SYMBOL_GPL(ata_pio_need_iordy);
Alan Cox452503f2005-10-21 19:01:32 -04006150EXPORT_SYMBOL_GPL(ata_timing_compute);
6151EXPORT_SYMBOL_GPL(ata_timing_merge);
6152
Linus Torvalds1da177e2005-04-16 15:20:36 -07006153#ifdef CONFIG_PCI
6154EXPORT_SYMBOL_GPL(pci_test_config_bits);
Jeff Garzik374b1872005-08-30 05:42:52 -04006155EXPORT_SYMBOL_GPL(ata_pci_host_stop);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006156EXPORT_SYMBOL_GPL(ata_pci_init_native_mode);
6157EXPORT_SYMBOL_GPL(ata_pci_init_one);
6158EXPORT_SYMBOL_GPL(ata_pci_remove_one);
Tejun Heo500530f2006-07-03 16:07:27 +09006159EXPORT_SYMBOL_GPL(ata_pci_device_do_suspend);
6160EXPORT_SYMBOL_GPL(ata_pci_device_do_resume);
Jens Axboe9b847542006-01-06 09:28:07 +01006161EXPORT_SYMBOL_GPL(ata_pci_device_suspend);
6162EXPORT_SYMBOL_GPL(ata_pci_device_resume);
Alan Cox67951ad2006-03-22 15:55:54 +00006163EXPORT_SYMBOL_GPL(ata_pci_default_filter);
6164EXPORT_SYMBOL_GPL(ata_pci_clear_simplex);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006165#endif /* CONFIG_PCI */
Jens Axboe9b847542006-01-06 09:28:07 +01006166
Jens Axboe9b847542006-01-06 09:28:07 +01006167EXPORT_SYMBOL_GPL(ata_scsi_device_suspend);
6168EXPORT_SYMBOL_GPL(ata_scsi_device_resume);
Tejun Heoece1d632006-04-02 18:51:53 +09006169
Tejun Heoece1d632006-04-02 18:51:53 +09006170EXPORT_SYMBOL_GPL(ata_eng_timeout);
Tejun Heo7b70fc02006-05-15 20:58:07 +09006171EXPORT_SYMBOL_GPL(ata_port_schedule_eh);
6172EXPORT_SYMBOL_GPL(ata_port_abort);
Tejun Heoe3180492006-05-15 20:58:09 +09006173EXPORT_SYMBOL_GPL(ata_port_freeze);
6174EXPORT_SYMBOL_GPL(ata_eh_freeze_port);
6175EXPORT_SYMBOL_GPL(ata_eh_thaw_port);
Tejun Heoece1d632006-04-02 18:51:53 +09006176EXPORT_SYMBOL_GPL(ata_eh_qc_complete);
6177EXPORT_SYMBOL_GPL(ata_eh_qc_retry);
Tejun Heo022bdb02006-05-15 20:58:22 +09006178EXPORT_SYMBOL_GPL(ata_do_eh);