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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 Heobe9a50c2006-03-31 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 */
Alan Cox46767aeb2006-09-29 18:26:47 +0100873 u8 mode = id[ATA_ID_OLD_PIO_MODES] & 0xFF;
874 if (mode < 5) /* Valid PIO range */
875 pio_mask = (2 << mode) - 1;
876 else
877 pio_mask = 1;
Tejun Heocb95d562006-03-06 04:31:56 +0900878
879 /* But wait.. there's more. Design your standards by
880 * committee and you too can get a free iordy field to
881 * process. However its the speeds not the modes that
882 * are supported... Note drivers using the timing API
883 * will get this right anyway
884 */
885 }
886
887 mwdma_mask = id[ATA_ID_MWDMA_MODES] & 0x07;
Tejun Heofb21f0d2006-03-12 12:34:35 +0900888
Alan Coxb352e572006-08-10 18:52:12 +0100889 if (ata_id_is_cfa(id)) {
890 /*
891 * Process compact flash extended modes
892 */
893 int pio = id[163] & 0x7;
894 int dma = (id[163] >> 3) & 7;
895
896 if (pio)
897 pio_mask |= (1 << 5);
898 if (pio > 1)
899 pio_mask |= (1 << 6);
900 if (dma)
901 mwdma_mask |= (1 << 3);
902 if (dma > 1)
903 mwdma_mask |= (1 << 4);
904 }
905
Tejun Heofb21f0d2006-03-12 12:34:35 +0900906 udma_mask = 0;
907 if (id[ATA_ID_FIELD_VALID] & (1 << 2))
908 udma_mask = id[ATA_ID_UDMA_MODES] & 0xff;
Tejun Heocb95d562006-03-06 04:31:56 +0900909
910 return ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask);
911}
912
Tejun Heo86e45b62006-03-05 15:29:09 +0900913/**
914 * ata_port_queue_task - Queue port_task
915 * @ap: The ata_port to queue port_task for
Randy Dunlape2a7f772006-05-18 10:50:18 -0700916 * @fn: workqueue function to be scheduled
917 * @data: data value to pass to workqueue function
918 * @delay: delay time for workqueue function
Tejun Heo86e45b62006-03-05 15:29:09 +0900919 *
920 * Schedule @fn(@data) for execution after @delay jiffies using
921 * port_task. There is one port_task per port and it's the
922 * user(low level driver)'s responsibility to make sure that only
923 * one task is active at any given time.
924 *
925 * libata core layer takes care of synchronization between
926 * port_task and EH. ata_port_queue_task() may be ignored for EH
927 * synchronization.
928 *
929 * LOCKING:
930 * Inherited from caller.
931 */
932void ata_port_queue_task(struct ata_port *ap, void (*fn)(void *), void *data,
933 unsigned long delay)
934{
935 int rc;
936
Tejun Heob51e9e52006-06-29 01:29:30 +0900937 if (ap->pflags & ATA_PFLAG_FLUSH_PORT_TASK)
Tejun Heo86e45b62006-03-05 15:29:09 +0900938 return;
939
940 PREPARE_WORK(&ap->port_task, fn, data);
941
942 if (!delay)
943 rc = queue_work(ata_wq, &ap->port_task);
944 else
945 rc = queue_delayed_work(ata_wq, &ap->port_task, delay);
946
947 /* rc == 0 means that another user is using port task */
948 WARN_ON(rc == 0);
949}
950
951/**
952 * ata_port_flush_task - Flush port_task
953 * @ap: The ata_port to flush port_task for
954 *
955 * After this function completes, port_task is guranteed not to
956 * be running or scheduled.
957 *
958 * LOCKING:
959 * Kernel thread context (may sleep)
960 */
961void ata_port_flush_task(struct ata_port *ap)
962{
963 unsigned long flags;
964
965 DPRINTK("ENTER\n");
966
Jeff Garzikba6a1302006-06-22 23:46:10 -0400967 spin_lock_irqsave(ap->lock, flags);
Tejun Heob51e9e52006-06-29 01:29:30 +0900968 ap->pflags |= ATA_PFLAG_FLUSH_PORT_TASK;
Jeff Garzikba6a1302006-06-22 23:46:10 -0400969 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heo86e45b62006-03-05 15:29:09 +0900970
971 DPRINTK("flush #1\n");
972 flush_workqueue(ata_wq);
973
974 /*
975 * At this point, if a task is running, it's guaranteed to see
976 * the FLUSH flag; thus, it will never queue pio tasks again.
977 * Cancel and flush.
978 */
979 if (!cancel_delayed_work(&ap->port_task)) {
Borislav Petkov0dd4b212006-06-23 02:29:08 -0400980 if (ata_msg_ctl(ap))
Tejun Heo88574552006-06-25 20:00:35 +0900981 ata_port_printk(ap, KERN_DEBUG, "%s: flush #2\n",
982 __FUNCTION__);
Tejun Heo86e45b62006-03-05 15:29:09 +0900983 flush_workqueue(ata_wq);
984 }
985
Jeff Garzikba6a1302006-06-22 23:46:10 -0400986 spin_lock_irqsave(ap->lock, flags);
Tejun Heob51e9e52006-06-29 01:29:30 +0900987 ap->pflags &= ~ATA_PFLAG_FLUSH_PORT_TASK;
Jeff Garzikba6a1302006-06-22 23:46:10 -0400988 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heo86e45b62006-03-05 15:29:09 +0900989
Borislav Petkov0dd4b212006-06-23 02:29:08 -0400990 if (ata_msg_ctl(ap))
991 ata_port_printk(ap, KERN_DEBUG, "%s: EXIT\n", __FUNCTION__);
Tejun Heo86e45b62006-03-05 15:29:09 +0900992}
993
Tejun Heo77853bf2006-01-23 13:09:36 +0900994void ata_qc_complete_internal(struct ata_queued_cmd *qc)
Tejun Heoa2a7a662005-12-13 14:48:31 +0900995{
Tejun Heo77853bf2006-01-23 13:09:36 +0900996 struct completion *waiting = qc->private_data;
Tejun Heoa2a7a662005-12-13 14:48:31 +0900997
Tejun Heoa2a7a662005-12-13 14:48:31 +0900998 complete(waiting);
Tejun Heoa2a7a662005-12-13 14:48:31 +0900999}
1000
1001/**
1002 * ata_exec_internal - execute libata internal command
Tejun Heoa2a7a662005-12-13 14:48:31 +09001003 * @dev: Device to which the command is sent
1004 * @tf: Taskfile registers for the command and the result
Tejun Heod69cf372006-04-02 18:51:53 +09001005 * @cdb: CDB for packet command
Tejun Heoa2a7a662005-12-13 14:48:31 +09001006 * @dma_dir: Data tranfer direction of the command
1007 * @buf: Data buffer of the command
1008 * @buflen: Length of data buffer
1009 *
1010 * Executes libata internal command with timeout. @tf contains
1011 * command on entry and result on return. Timeout and error
1012 * conditions are reported via return value. No recovery action
1013 * is taken after a command times out. It's caller's duty to
1014 * clean up after timeout.
1015 *
1016 * LOCKING:
1017 * None. Should be called with kernel context, might sleep.
Tejun Heo551e8882006-06-12 14:09:49 +09001018 *
1019 * RETURNS:
1020 * Zero on success, AC_ERR_* mask on failure
Tejun Heoa2a7a662005-12-13 14:48:31 +09001021 */
Tejun Heo3373efd2006-05-15 20:57:53 +09001022unsigned ata_exec_internal(struct ata_device *dev,
Tejun Heo1ad8e7f2006-04-02 18:51:53 +09001023 struct ata_taskfile *tf, const u8 *cdb,
1024 int dma_dir, void *buf, unsigned int buflen)
Tejun Heoa2a7a662005-12-13 14:48:31 +09001025{
Tejun Heo3373efd2006-05-15 20:57:53 +09001026 struct ata_port *ap = dev->ap;
Tejun Heoa2a7a662005-12-13 14:48:31 +09001027 u8 command = tf->command;
1028 struct ata_queued_cmd *qc;
Tejun Heo2ab7db12006-05-15 20:58:02 +09001029 unsigned int tag, preempted_tag;
Tejun Heodedaf2b2006-05-15 21:03:43 +09001030 u32 preempted_sactive, preempted_qc_active;
Ingo Molnar60be6b92006-07-03 00:25:26 -07001031 DECLARE_COMPLETION_ONSTACK(wait);
Tejun Heoa2a7a662005-12-13 14:48:31 +09001032 unsigned long flags;
Tejun Heo77853bf2006-01-23 13:09:36 +09001033 unsigned int err_mask;
Tejun Heod95a7172006-05-15 20:58:14 +09001034 int rc;
Tejun Heoa2a7a662005-12-13 14:48:31 +09001035
Jeff Garzikba6a1302006-06-22 23:46:10 -04001036 spin_lock_irqsave(ap->lock, flags);
Tejun Heoa2a7a662005-12-13 14:48:31 +09001037
Tejun Heoe3180492006-05-15 20:58:09 +09001038 /* no internal command while frozen */
Tejun Heob51e9e52006-06-29 01:29:30 +09001039 if (ap->pflags & ATA_PFLAG_FROZEN) {
Jeff Garzikba6a1302006-06-22 23:46:10 -04001040 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heoe3180492006-05-15 20:58:09 +09001041 return AC_ERR_SYSTEM;
1042 }
1043
Tejun Heo2ab7db12006-05-15 20:58:02 +09001044 /* initialize internal qc */
Tejun Heoa2a7a662005-12-13 14:48:31 +09001045
Tejun Heo2ab7db12006-05-15 20:58:02 +09001046 /* XXX: Tag 0 is used for drivers with legacy EH as some
1047 * drivers choke if any other tag is given. This breaks
1048 * ata_tag_internal() test for those drivers. Don't use new
1049 * EH stuff without converting to it.
1050 */
1051 if (ap->ops->error_handler)
1052 tag = ATA_TAG_INTERNAL;
1053 else
1054 tag = 0;
1055
Tejun Heo6cec4a32006-05-15 21:03:41 +09001056 if (test_and_set_bit(tag, &ap->qc_allocated))
Tejun Heo2ab7db12006-05-15 20:58:02 +09001057 BUG();
Tejun Heof69499f2006-05-15 20:58:03 +09001058 qc = __ata_qc_from_tag(ap, tag);
Tejun Heo2ab7db12006-05-15 20:58:02 +09001059
1060 qc->tag = tag;
1061 qc->scsicmd = NULL;
1062 qc->ap = ap;
1063 qc->dev = dev;
1064 ata_qc_reinit(qc);
1065
1066 preempted_tag = ap->active_tag;
Tejun Heodedaf2b2006-05-15 21:03:43 +09001067 preempted_sactive = ap->sactive;
1068 preempted_qc_active = ap->qc_active;
Tejun Heo2ab7db12006-05-15 20:58:02 +09001069 ap->active_tag = ATA_TAG_POISON;
Tejun Heodedaf2b2006-05-15 21:03:43 +09001070 ap->sactive = 0;
1071 ap->qc_active = 0;
Tejun Heo2ab7db12006-05-15 20:58:02 +09001072
1073 /* prepare & issue qc */
Tejun Heoa2a7a662005-12-13 14:48:31 +09001074 qc->tf = *tf;
Tejun Heod69cf372006-04-02 18:51:53 +09001075 if (cdb)
1076 memcpy(qc->cdb, cdb, ATAPI_CDB_LEN);
Tejun Heoe61e0672006-05-15 20:57:40 +09001077 qc->flags |= ATA_QCFLAG_RESULT_TF;
Tejun Heoa2a7a662005-12-13 14:48:31 +09001078 qc->dma_dir = dma_dir;
1079 if (dma_dir != DMA_NONE) {
1080 ata_sg_init_one(qc, buf, buflen);
1081 qc->nsect = buflen / ATA_SECT_SIZE;
1082 }
1083
Tejun Heo77853bf2006-01-23 13:09:36 +09001084 qc->private_data = &wait;
Tejun Heoa2a7a662005-12-13 14:48:31 +09001085 qc->complete_fn = ata_qc_complete_internal;
1086
Tejun Heo8e0e6942006-03-31 20:41:11 +09001087 ata_qc_issue(qc);
Tejun Heoa2a7a662005-12-13 14:48:31 +09001088
Jeff Garzikba6a1302006-06-22 23:46:10 -04001089 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heoa2a7a662005-12-13 14:48:31 +09001090
Andrew Mortona8601e52006-06-25 01:36:52 -07001091 rc = wait_for_completion_timeout(&wait, ata_probe_timeout);
Albert Lee41ade502006-03-14 11:19:04 +08001092
Tejun Heod95a7172006-05-15 20:58:14 +09001093 ata_port_flush_task(ap);
1094
1095 if (!rc) {
Jeff Garzikba6a1302006-06-22 23:46:10 -04001096 spin_lock_irqsave(ap->lock, flags);
Tejun Heoa2a7a662005-12-13 14:48:31 +09001097
1098 /* We're racing with irq here. If we lose, the
1099 * following test prevents us from completing the qc
Tejun Heod95a7172006-05-15 20:58:14 +09001100 * twice. If we win, the port is frozen and will be
1101 * cleaned up by ->post_internal_cmd().
Tejun Heoa2a7a662005-12-13 14:48:31 +09001102 */
Tejun Heo77853bf2006-01-23 13:09:36 +09001103 if (qc->flags & ATA_QCFLAG_ACTIVE) {
Tejun Heod95a7172006-05-15 20:58:14 +09001104 qc->err_mask |= AC_ERR_TIMEOUT;
1105
1106 if (ap->ops->error_handler)
1107 ata_port_freeze(ap);
1108 else
1109 ata_qc_complete(qc);
Tejun Heof15a1da2006-05-15 20:57:56 +09001110
Borislav Petkov0dd4b212006-06-23 02:29:08 -04001111 if (ata_msg_warn(ap))
1112 ata_dev_printk(dev, KERN_WARNING,
Tejun Heo88574552006-06-25 20:00:35 +09001113 "qc timeout (cmd 0x%x)\n", command);
Tejun Heoa2a7a662005-12-13 14:48:31 +09001114 }
1115
Jeff Garzikba6a1302006-06-22 23:46:10 -04001116 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heoa2a7a662005-12-13 14:48:31 +09001117 }
1118
Tejun Heod95a7172006-05-15 20:58:14 +09001119 /* do post_internal_cmd */
1120 if (ap->ops->post_internal_cmd)
1121 ap->ops->post_internal_cmd(qc);
1122
1123 if (qc->flags & ATA_QCFLAG_FAILED && !qc->err_mask) {
Borislav Petkov0dd4b212006-06-23 02:29:08 -04001124 if (ata_msg_warn(ap))
Tejun Heo88574552006-06-25 20:00:35 +09001125 ata_dev_printk(dev, KERN_WARNING,
Borislav Petkov0dd4b212006-06-23 02:29:08 -04001126 "zero err_mask for failed "
Tejun Heo88574552006-06-25 20:00:35 +09001127 "internal command, assuming AC_ERR_OTHER\n");
Tejun Heod95a7172006-05-15 20:58:14 +09001128 qc->err_mask |= AC_ERR_OTHER;
1129 }
1130
Tejun Heo15869302006-05-15 20:57:33 +09001131 /* finish up */
Jeff Garzikba6a1302006-06-22 23:46:10 -04001132 spin_lock_irqsave(ap->lock, flags);
Tejun Heo15869302006-05-15 20:57:33 +09001133
Tejun Heoe61e0672006-05-15 20:57:40 +09001134 *tf = qc->result_tf;
Tejun Heo77853bf2006-01-23 13:09:36 +09001135 err_mask = qc->err_mask;
1136
1137 ata_qc_free(qc);
Tejun Heo2ab7db12006-05-15 20:58:02 +09001138 ap->active_tag = preempted_tag;
Tejun Heodedaf2b2006-05-15 21:03:43 +09001139 ap->sactive = preempted_sactive;
1140 ap->qc_active = preempted_qc_active;
Tejun Heo77853bf2006-01-23 13:09:36 +09001141
Tejun Heo1f7dd3e92006-03-24 15:25:30 +09001142 /* XXX - Some LLDDs (sata_mv) disable port on command failure.
1143 * Until those drivers are fixed, we detect the condition
1144 * here, fail the command with AC_ERR_SYSTEM and reenable the
1145 * port.
1146 *
1147 * Note that this doesn't change any behavior as internal
1148 * command failure results in disabling the device in the
1149 * higher layer for LLDDs without new reset/EH callbacks.
1150 *
1151 * Kill the following code as soon as those drivers are fixed.
1152 */
Tejun Heo198e0fe2006-04-02 18:51:52 +09001153 if (ap->flags & ATA_FLAG_DISABLED) {
Tejun Heo1f7dd3e92006-03-24 15:25:30 +09001154 err_mask |= AC_ERR_SYSTEM;
1155 ata_port_probe(ap);
1156 }
1157
Jeff Garzikba6a1302006-06-22 23:46:10 -04001158 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heo15869302006-05-15 20:57:33 +09001159
Tejun Heo77853bf2006-01-23 13:09:36 +09001160 return err_mask;
Tejun Heoa2a7a662005-12-13 14:48:31 +09001161}
1162
Linus Torvalds1da177e2005-04-16 15:20:36 -07001163/**
Tejun Heo977e6b92006-06-24 20:30:19 +09001164 * ata_do_simple_cmd - execute simple internal command
1165 * @dev: Device to which the command is sent
1166 * @cmd: Opcode to execute
1167 *
1168 * Execute a 'simple' command, that only consists of the opcode
1169 * 'cmd' itself, without filling any other registers
1170 *
1171 * LOCKING:
1172 * Kernel thread context (may sleep).
1173 *
1174 * RETURNS:
1175 * Zero on success, AC_ERR_* mask on failure
Tejun Heoe58eb582006-06-24 20:30:19 +09001176 */
Tejun Heo77b08fb2006-06-24 20:30:19 +09001177unsigned int ata_do_simple_cmd(struct ata_device *dev, u8 cmd)
Tejun Heoe58eb582006-06-24 20:30:19 +09001178{
1179 struct ata_taskfile tf;
Tejun Heoe58eb582006-06-24 20:30:19 +09001180
1181 ata_tf_init(dev, &tf);
1182
1183 tf.command = cmd;
1184 tf.flags |= ATA_TFLAG_DEVICE;
1185 tf.protocol = ATA_PROT_NODATA;
1186
Tejun Heo977e6b92006-06-24 20:30:19 +09001187 return ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0);
Tejun Heoe58eb582006-06-24 20:30:19 +09001188}
1189
Linus Torvalds1da177e2005-04-16 15:20:36 -07001190/**
Alan Cox1bc4ccf2006-01-09 17:18:14 +00001191 * ata_pio_need_iordy - check if iordy needed
1192 * @adev: ATA device
1193 *
1194 * Check if the current speed of the device requires IORDY. Used
1195 * by various controllers for chip configuration.
1196 */
1197
1198unsigned int ata_pio_need_iordy(const struct ata_device *adev)
1199{
1200 int pio;
1201 int speed = adev->pio_mode - XFER_PIO_0;
1202
1203 if (speed < 2)
1204 return 0;
1205 if (speed > 2)
1206 return 1;
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05001207
Alan Cox1bc4ccf2006-01-09 17:18:14 +00001208 /* If we have no drive specific rule, then PIO 2 is non IORDY */
1209
1210 if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE */
1211 pio = adev->id[ATA_ID_EIDE_PIO];
1212 /* Is the speed faster than the drive allows non IORDY ? */
1213 if (pio) {
1214 /* This is cycle times not frequency - watch the logic! */
1215 if (pio > 240) /* PIO2 is 240nS per cycle */
1216 return 1;
1217 return 0;
1218 }
1219 }
1220 return 0;
1221}
1222
1223/**
Tejun Heo49016ac2006-02-21 02:12:11 +09001224 * ata_dev_read_id - Read ID data from the specified device
Tejun Heo49016ac2006-02-21 02:12:11 +09001225 * @dev: target device
1226 * @p_class: pointer to class of the target device (may be changed)
Tejun Heobff04642006-11-10 18:08:10 +09001227 * @flags: ATA_READID_* flags
Tejun Heofe635c72006-05-15 20:57:35 +09001228 * @id: buffer to read IDENTIFY data into
Tejun Heo49016ac2006-02-21 02:12:11 +09001229 *
1230 * Read ID data from the specified device. ATA_CMD_ID_ATA is
1231 * performed on ATA devices and ATA_CMD_ID_ATAPI on ATAPI
Tejun Heoaec5c3c2006-03-25 01:33:34 +09001232 * devices. This function also issues ATA_CMD_INIT_DEV_PARAMS
1233 * for pre-ATA4 drives.
Tejun Heo49016ac2006-02-21 02:12:11 +09001234 *
1235 * LOCKING:
1236 * Kernel thread context (may sleep)
1237 *
1238 * RETURNS:
1239 * 0 on success, -errno otherwise.
1240 */
Tejun Heoa9beec92006-05-31 18:27:44 +09001241int ata_dev_read_id(struct ata_device *dev, unsigned int *p_class,
Tejun Heobff04642006-11-10 18:08:10 +09001242 unsigned int flags, u16 *id)
Tejun Heo49016ac2006-02-21 02:12:11 +09001243{
Tejun Heo3373efd2006-05-15 20:57:53 +09001244 struct ata_port *ap = dev->ap;
Tejun Heo49016ac2006-02-21 02:12:11 +09001245 unsigned int class = *p_class;
Tejun Heo49016ac2006-02-21 02:12:11 +09001246 struct ata_taskfile tf;
1247 unsigned int err_mask = 0;
1248 const char *reason;
1249 int rc;
1250
Borislav Petkov0dd4b212006-06-23 02:29:08 -04001251 if (ata_msg_ctl(ap))
Tejun Heo88574552006-06-25 20:00:35 +09001252 ata_dev_printk(dev, KERN_DEBUG, "%s: ENTER, host %u, dev %u\n",
1253 __FUNCTION__, ap->id, dev->devno);
Tejun Heo49016ac2006-02-21 02:12:11 +09001254
Tejun Heo49016ac2006-02-21 02:12:11 +09001255 ata_dev_select(ap, dev->devno, 1, 1); /* select device 0/1 */
1256
1257 retry:
Tejun Heo3373efd2006-05-15 20:57:53 +09001258 ata_tf_init(dev, &tf);
Tejun Heo49016ac2006-02-21 02:12:11 +09001259
1260 switch (class) {
1261 case ATA_DEV_ATA:
1262 tf.command = ATA_CMD_ID_ATA;
1263 break;
1264 case ATA_DEV_ATAPI:
1265 tf.command = ATA_CMD_ID_ATAPI;
1266 break;
1267 default:
1268 rc = -ENODEV;
1269 reason = "unsupported class";
1270 goto err_out;
1271 }
1272
1273 tf.protocol = ATA_PROT_PIO;
1274
Tejun Heo55a8e2c2006-11-10 18:08:10 +09001275 /* presence detection using polling IDENTIFY? */
1276 if (flags & ATA_READID_DETECT)
1277 tf.flags |= ATA_TFLAG_POLLING;
1278
Tejun Heo3373efd2006-05-15 20:57:53 +09001279 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_FROM_DEVICE,
Tejun Heo49016ac2006-02-21 02:12:11 +09001280 id, sizeof(id[0]) * ATA_ID_WORDS);
Tejun Heo49016ac2006-02-21 02:12:11 +09001281 if (err_mask) {
Tejun Heo55a8e2c2006-11-10 18:08:10 +09001282 if ((flags & ATA_READID_DETECT) &&
1283 (err_mask & AC_ERR_NODEV_HINT)) {
1284 DPRINTK("ata%u.%d: NODEV after polling detection\n",
1285 ap->id, dev->devno);
1286 return -ENOENT;
1287 }
1288
Tejun Heo49016ac2006-02-21 02:12:11 +09001289 rc = -EIO;
1290 reason = "I/O error";
Tejun Heo49016ac2006-02-21 02:12:11 +09001291 goto err_out;
1292 }
1293
1294 swap_buf_le16(id, ATA_ID_WORDS);
1295
Tejun Heo49016ac2006-02-21 02:12:11 +09001296 /* sanity check */
Tejun Heoa4f57492006-09-12 20:35:49 -07001297 rc = -EINVAL;
1298 reason = "device reports illegal type";
1299
1300 if (class == ATA_DEV_ATA) {
1301 if (!ata_id_is_ata(id) && !ata_id_is_cfa(id))
1302 goto err_out;
1303 } else {
1304 if (ata_id_is_ata(id))
1305 goto err_out;
Tejun Heo49016ac2006-02-21 02:12:11 +09001306 }
1307
Tejun Heobff04642006-11-10 18:08:10 +09001308 if ((flags & ATA_READID_POSTRESET) && class == ATA_DEV_ATA) {
Tejun Heo49016ac2006-02-21 02:12:11 +09001309 /*
1310 * The exact sequence expected by certain pre-ATA4 drives is:
1311 * SRST RESET
1312 * IDENTIFY
1313 * INITIALIZE DEVICE PARAMETERS
1314 * anything else..
1315 * Some drives were very specific about that exact sequence.
1316 */
1317 if (ata_id_major_version(id) < 4 || !ata_id_has_lba(id)) {
Tejun Heo3373efd2006-05-15 20:57:53 +09001318 err_mask = ata_dev_init_params(dev, id[3], id[6]);
Tejun Heo49016ac2006-02-21 02:12:11 +09001319 if (err_mask) {
1320 rc = -EIO;
1321 reason = "INIT_DEV_PARAMS failed";
1322 goto err_out;
1323 }
1324
1325 /* current CHS translation info (id[53-58]) might be
1326 * changed. reread the identify device info.
1327 */
Tejun Heobff04642006-11-10 18:08:10 +09001328 flags &= ~ATA_READID_POSTRESET;
Tejun Heo49016ac2006-02-21 02:12:11 +09001329 goto retry;
1330 }
1331 }
1332
1333 *p_class = class;
Tejun Heofe635c72006-05-15 20:57:35 +09001334
Tejun Heo49016ac2006-02-21 02:12:11 +09001335 return 0;
1336
1337 err_out:
Tejun Heo88574552006-06-25 20:00:35 +09001338 if (ata_msg_warn(ap))
Borislav Petkov0dd4b212006-06-23 02:29:08 -04001339 ata_dev_printk(dev, KERN_WARNING, "failed to IDENTIFY "
Tejun Heo88574552006-06-25 20:00:35 +09001340 "(%s, err_mask=0x%x)\n", reason, err_mask);
Tejun Heo49016ac2006-02-21 02:12:11 +09001341 return rc;
1342}
1343
Tejun Heo3373efd2006-05-15 20:57:53 +09001344static inline u8 ata_dev_knobble(struct ata_device *dev)
Tejun Heo4b2f3ed2006-03-01 16:09:36 +09001345{
Tejun Heo3373efd2006-05-15 20:57:53 +09001346 return ((dev->ap->cbl == ATA_CBL_SATA) && (!ata_id_is_sata(dev->id)));
Tejun Heo4b2f3ed2006-03-01 16:09:36 +09001347}
1348
Tejun Heoa6e6ce82006-05-15 21:03:48 +09001349static void ata_dev_config_ncq(struct ata_device *dev,
1350 char *desc, size_t desc_sz)
1351{
1352 struct ata_port *ap = dev->ap;
1353 int hdepth = 0, ddepth = ata_id_queue_depth(dev->id);
1354
1355 if (!ata_id_has_ncq(dev->id)) {
1356 desc[0] = '\0';
1357 return;
1358 }
Alan Cox6919a0a2006-10-27 19:08:46 -07001359 if (ata_device_blacklisted(dev) & ATA_HORKAGE_NONCQ) {
1360 snprintf(desc, desc_sz, "NCQ (not used)");
1361 return;
1362 }
Tejun Heoa6e6ce82006-05-15 21:03:48 +09001363 if (ap->flags & ATA_FLAG_NCQ) {
Jeff Garzikcca39742006-08-24 03:19:22 -04001364 hdepth = min(ap->scsi_host->can_queue, ATA_MAX_QUEUE - 1);
Tejun Heoa6e6ce82006-05-15 21:03:48 +09001365 dev->flags |= ATA_DFLAG_NCQ;
1366 }
1367
1368 if (hdepth >= ddepth)
1369 snprintf(desc, desc_sz, "NCQ (depth %d)", ddepth);
1370 else
1371 snprintf(desc, desc_sz, "NCQ (depth %d/%d)", hdepth, ddepth);
1372}
1373
Brian Kinge6d902a2006-06-28 08:30:31 -05001374static void ata_set_port_max_cmd_len(struct ata_port *ap)
1375{
1376 int i;
1377
Jeff Garzikcca39742006-08-24 03:19:22 -04001378 if (ap->scsi_host) {
1379 unsigned int len = 0;
1380
Brian Kinge6d902a2006-06-28 08:30:31 -05001381 for (i = 0; i < ATA_MAX_DEVICES; i++)
Jeff Garzikcca39742006-08-24 03:19:22 -04001382 len = max(len, ap->device[i].cdb_len);
1383
1384 ap->scsi_host->max_cmd_len = len;
Brian Kinge6d902a2006-06-28 08:30:31 -05001385 }
1386}
1387
Tejun Heo49016ac2006-02-21 02:12:11 +09001388/**
Tejun Heoffeae412006-03-01 16:09:35 +09001389 * ata_dev_configure - Configure the specified ATA/ATAPI device
Tejun Heoffeae412006-03-01 16:09:35 +09001390 * @dev: Target device to configure
Linus Torvalds1da177e2005-04-16 15:20:36 -07001391 *
Tejun Heoffeae412006-03-01 16:09:35 +09001392 * Configure @dev according to @dev->id. Generic and low-level
1393 * driver specific fixups are also applied.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001394 *
1395 * LOCKING:
Tejun Heoffeae412006-03-01 16:09:35 +09001396 * Kernel thread context (may sleep)
1397 *
1398 * RETURNS:
1399 * 0 on success, -errno otherwise
Linus Torvalds1da177e2005-04-16 15:20:36 -07001400 */
Tejun Heoefdaedc2006-11-01 18:38:52 +09001401int ata_dev_configure(struct ata_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001402{
Tejun Heo3373efd2006-05-15 20:57:53 +09001403 struct ata_port *ap = dev->ap;
Tejun Heoefdaedc2006-11-01 18:38:52 +09001404 int print_info = ap->eh_context.i.flags & ATA_EHI_PRINTINFO;
Tejun Heo1148c3a2006-03-13 19:48:04 +09001405 const u16 *id = dev->id;
Tejun Heoff8854b2006-03-06 04:31:56 +09001406 unsigned int xfer_mask;
Alan Coxb352e572006-08-10 18:52:12 +01001407 char revbuf[7]; /* XYZ-99\0 */
Brian Kinge6d902a2006-06-28 08:30:31 -05001408 int rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001409
Borislav Petkov0dd4b212006-06-23 02:29:08 -04001410 if (!ata_dev_enabled(dev) && ata_msg_info(ap)) {
Tejun Heo88574552006-06-25 20:00:35 +09001411 ata_dev_printk(dev, KERN_INFO,
1412 "%s: ENTER/EXIT (host %u, dev %u) -- nodev\n",
1413 __FUNCTION__, ap->id, dev->devno);
Tejun Heoffeae412006-03-01 16:09:35 +09001414 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001415 }
1416
Borislav Petkov0dd4b212006-06-23 02:29:08 -04001417 if (ata_msg_probe(ap))
Tejun Heo88574552006-06-25 20:00:35 +09001418 ata_dev_printk(dev, KERN_DEBUG, "%s: ENTER, host %u, dev %u\n",
1419 __FUNCTION__, ap->id, dev->devno);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001420
Tejun Heoc39f5eb2006-03-13 19:51:19 +09001421 /* print device capabilities */
Borislav Petkov0dd4b212006-06-23 02:29:08 -04001422 if (ata_msg_probe(ap))
Tejun Heo88574552006-06-25 20:00:35 +09001423 ata_dev_printk(dev, KERN_DEBUG,
1424 "%s: cfg 49:%04x 82:%04x 83:%04x 84:%04x "
1425 "85:%04x 86:%04x 87:%04x 88:%04x\n",
Borislav Petkov0dd4b212006-06-23 02:29:08 -04001426 __FUNCTION__,
Tejun Heof15a1da2006-05-15 20:57:56 +09001427 id[49], id[82], id[83], id[84],
1428 id[85], id[86], id[87], id[88]);
Tejun Heoc39f5eb2006-03-13 19:51:19 +09001429
Tejun Heo208a9932006-03-05 17:55:58 +09001430 /* initialize to-be-configured parameters */
Tejun Heoea1dd4e2006-04-02 18:51:53 +09001431 dev->flags &= ~ATA_DFLAG_CFG_MASK;
Tejun Heo208a9932006-03-05 17:55:58 +09001432 dev->max_sectors = 0;
1433 dev->cdb_len = 0;
1434 dev->n_sectors = 0;
1435 dev->cylinders = 0;
1436 dev->heads = 0;
1437 dev->sectors = 0;
1438
Linus Torvalds1da177e2005-04-16 15:20:36 -07001439 /*
1440 * common ATA, ATAPI feature tests
1441 */
1442
Tejun Heoff8854b2006-03-06 04:31:56 +09001443 /* find max transfer mode; for printk only */
Tejun Heo1148c3a2006-03-13 19:48:04 +09001444 xfer_mask = ata_id_xfermask(id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001445
Borislav Petkov0dd4b212006-06-23 02:29:08 -04001446 if (ata_msg_probe(ap))
1447 ata_dump_id(id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001448
1449 /* ATA-specific feature tests */
1450 if (dev->class == ATA_DEV_ATA) {
Alan Coxb352e572006-08-10 18:52:12 +01001451 if (ata_id_is_cfa(id)) {
1452 if (id[162] & 1) /* CPRM may make this media unusable */
1453 ata_dev_printk(dev, KERN_WARNING, "ata%u: device %u supports DRM functions and may not be fully accessable.\n",
1454 ap->id, dev->devno);
1455 snprintf(revbuf, 7, "CFA");
1456 }
1457 else
1458 snprintf(revbuf, 7, "ATA-%d", ata_id_major_version(id));
1459
Tejun Heo1148c3a2006-03-13 19:48:04 +09001460 dev->n_sectors = ata_id_n_sectors(id);
Tejun Heo29407402006-02-12 22:47:04 +09001461
Tejun Heo1148c3a2006-03-13 19:48:04 +09001462 if (ata_id_has_lba(id)) {
Tejun Heo4c2d7212006-03-05 17:55:58 +09001463 const char *lba_desc;
Tejun Heoa6e6ce82006-05-15 21:03:48 +09001464 char ncq_desc[20];
Albert Lee8bf62ece2005-05-12 15:29:42 -04001465
Tejun Heo4c2d7212006-03-05 17:55:58 +09001466 lba_desc = "LBA";
1467 dev->flags |= ATA_DFLAG_LBA;
Tejun Heo1148c3a2006-03-13 19:48:04 +09001468 if (ata_id_has_lba48(id)) {
Albert Lee8bf62ece2005-05-12 15:29:42 -04001469 dev->flags |= ATA_DFLAG_LBA48;
Tejun Heo4c2d7212006-03-05 17:55:58 +09001470 lba_desc = "LBA48";
Tejun Heo6fc49ad2006-11-11 20:10:45 +09001471
1472 if (dev->n_sectors >= (1UL << 28) &&
1473 ata_id_has_flush_ext(id))
1474 dev->flags |= ATA_DFLAG_FLUSH_EXT;
Tejun Heo4c2d7212006-03-05 17:55:58 +09001475 }
Albert Lee8bf62ece2005-05-12 15:29:42 -04001476
Tejun Heoa6e6ce82006-05-15 21:03:48 +09001477 /* config NCQ */
1478 ata_dev_config_ncq(dev, ncq_desc, sizeof(ncq_desc));
1479
Albert Lee8bf62ece2005-05-12 15:29:42 -04001480 /* print device info to dmesg */
Borislav Petkov5afc8142006-06-27 14:51:25 +02001481 if (ata_msg_drv(ap) && print_info)
Alan Coxb352e572006-08-10 18:52:12 +01001482 ata_dev_printk(dev, KERN_INFO, "%s, "
Tejun Heoa6e6ce82006-05-15 21:03:48 +09001483 "max %s, %Lu sectors: %s %s\n",
Alan Coxb352e572006-08-10 18:52:12 +01001484 revbuf,
Tejun Heof15a1da2006-05-15 20:57:56 +09001485 ata_mode_string(xfer_mask),
1486 (unsigned long long)dev->n_sectors,
Tejun Heoa6e6ce82006-05-15 21:03:48 +09001487 lba_desc, ncq_desc);
Tejun Heoffeae412006-03-01 16:09:35 +09001488 } else {
Albert Lee8bf62ece2005-05-12 15:29:42 -04001489 /* CHS */
1490
1491 /* Default translation */
Tejun Heo1148c3a2006-03-13 19:48:04 +09001492 dev->cylinders = id[1];
1493 dev->heads = id[3];
1494 dev->sectors = id[6];
Albert Lee8bf62ece2005-05-12 15:29:42 -04001495
Tejun Heo1148c3a2006-03-13 19:48:04 +09001496 if (ata_id_current_chs_valid(id)) {
Albert Lee8bf62ece2005-05-12 15:29:42 -04001497 /* Current CHS translation is valid. */
Tejun Heo1148c3a2006-03-13 19:48:04 +09001498 dev->cylinders = id[54];
1499 dev->heads = id[55];
1500 dev->sectors = id[56];
Albert Lee8bf62ece2005-05-12 15:29:42 -04001501 }
1502
1503 /* print device info to dmesg */
Borislav Petkov5afc8142006-06-27 14:51:25 +02001504 if (ata_msg_drv(ap) && print_info)
Alan Coxb352e572006-08-10 18:52:12 +01001505 ata_dev_printk(dev, KERN_INFO, "%s, "
Tejun Heof15a1da2006-05-15 20:57:56 +09001506 "max %s, %Lu sectors: CHS %u/%u/%u\n",
Alan Coxb352e572006-08-10 18:52:12 +01001507 revbuf,
Tejun Heof15a1da2006-05-15 20:57:56 +09001508 ata_mode_string(xfer_mask),
1509 (unsigned long long)dev->n_sectors,
Tejun Heo88574552006-06-25 20:00:35 +09001510 dev->cylinders, dev->heads,
1511 dev->sectors);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001512 }
1513
Albert Lee07f6f7d2005-11-01 19:33:20 +08001514 if (dev->id[59] & 0x100) {
1515 dev->multi_count = dev->id[59] & 0xff;
Borislav Petkov5afc8142006-06-27 14:51:25 +02001516 if (ata_msg_drv(ap) && print_info)
Tejun Heo88574552006-06-25 20:00:35 +09001517 ata_dev_printk(dev, KERN_INFO,
1518 "ata%u: dev %u multi count %u\n",
1519 ap->id, dev->devno, dev->multi_count);
Albert Lee07f6f7d2005-11-01 19:33:20 +08001520 }
1521
Tejun Heo6e7846e2006-02-12 23:32:58 +09001522 dev->cdb_len = 16;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001523 }
1524
1525 /* ATAPI-specific feature tests */
Jeff Garzik2c13b7c2005-11-14 14:14:16 -05001526 else if (dev->class == ATA_DEV_ATAPI) {
Albert Lee08a556d2006-03-31 13:29:04 +08001527 char *cdb_intr_string = "";
1528
Tejun Heo1148c3a2006-03-13 19:48:04 +09001529 rc = atapi_cdb_len(id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001530 if ((rc < 12) || (rc > ATAPI_CDB_LEN)) {
Borislav Petkov0dd4b212006-06-23 02:29:08 -04001531 if (ata_msg_warn(ap))
Tejun Heo88574552006-06-25 20:00:35 +09001532 ata_dev_printk(dev, KERN_WARNING,
1533 "unsupported CDB len\n");
Tejun Heoffeae412006-03-01 16:09:35 +09001534 rc = -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001535 goto err_out_nosup;
1536 }
Tejun Heo6e7846e2006-02-12 23:32:58 +09001537 dev->cdb_len = (unsigned int) rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001538
Albert Lee08a556d2006-03-31 13:29:04 +08001539 if (ata_id_cdb_intr(dev->id)) {
Albert Lee312f7da2005-09-27 17:38:03 +08001540 dev->flags |= ATA_DFLAG_CDB_INTR;
Albert Lee08a556d2006-03-31 13:29:04 +08001541 cdb_intr_string = ", CDB intr";
1542 }
Albert Lee312f7da2005-09-27 17:38:03 +08001543
Linus Torvalds1da177e2005-04-16 15:20:36 -07001544 /* print device info to dmesg */
Borislav Petkov5afc8142006-06-27 14:51:25 +02001545 if (ata_msg_drv(ap) && print_info)
Tejun Heo12436c32006-05-15 20:59:15 +09001546 ata_dev_printk(dev, KERN_INFO, "ATAPI, max %s%s\n",
1547 ata_mode_string(xfer_mask),
1548 cdb_intr_string);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001549 }
1550
Tejun Heo914ed352006-11-01 18:39:55 +09001551 /* determine max_sectors */
1552 dev->max_sectors = ATA_MAX_SECTORS;
1553 if (dev->flags & ATA_DFLAG_LBA48)
1554 dev->max_sectors = ATA_MAX_SECTORS_LBA48;
1555
Alan Cox93590852006-09-12 16:55:12 +01001556 if (dev->horkage & ATA_HORKAGE_DIAGNOSTIC) {
1557 /* Let the user know. We don't want to disallow opens for
1558 rescue purposes, or in case the vendor is just a blithering
1559 idiot */
1560 if (print_info) {
1561 ata_dev_printk(dev, KERN_WARNING,
1562"Drive reports diagnostics failure. This may indicate a drive\n");
1563 ata_dev_printk(dev, KERN_WARNING,
1564"fault or invalid emulation. Contact drive vendor for information.\n");
1565 }
1566 }
1567
Brian Kinge6d902a2006-06-28 08:30:31 -05001568 ata_set_port_max_cmd_len(ap);
Tejun Heo6e7846e2006-02-12 23:32:58 +09001569
Tejun Heo4b2f3ed2006-03-01 16:09:36 +09001570 /* limit bridge transfers to udma5, 200 sectors */
Tejun Heo3373efd2006-05-15 20:57:53 +09001571 if (ata_dev_knobble(dev)) {
Borislav Petkov5afc8142006-06-27 14:51:25 +02001572 if (ata_msg_drv(ap) && print_info)
Tejun Heof15a1da2006-05-15 20:57:56 +09001573 ata_dev_printk(dev, KERN_INFO,
1574 "applying bridge limits\n");
Tejun Heo5a529132006-03-24 14:07:50 +09001575 dev->udma_mask &= ATA_UDMA5;
Tejun Heo4b2f3ed2006-03-01 16:09:36 +09001576 dev->max_sectors = ATA_MAX_SECTORS;
1577 }
1578
1579 if (ap->ops->dev_config)
1580 ap->ops->dev_config(ap, dev);
1581
Borislav Petkov0dd4b212006-06-23 02:29:08 -04001582 if (ata_msg_probe(ap))
1583 ata_dev_printk(dev, KERN_DEBUG, "%s: EXIT, drv_stat = 0x%x\n",
1584 __FUNCTION__, ata_chk_status(ap));
Tejun Heoffeae412006-03-01 16:09:35 +09001585 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001586
1587err_out_nosup:
Borislav Petkov0dd4b212006-06-23 02:29:08 -04001588 if (ata_msg_probe(ap))
Tejun Heo88574552006-06-25 20:00:35 +09001589 ata_dev_printk(dev, KERN_DEBUG,
1590 "%s: EXIT, err\n", __FUNCTION__);
Tejun Heoffeae412006-03-01 16:09:35 +09001591 return rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001592}
1593
1594/**
1595 * ata_bus_probe - Reset and probe ATA bus
1596 * @ap: Bus to probe
1597 *
Jeff Garzik0cba6322005-05-30 19:49:12 -04001598 * Master ATA bus probing function. Initiates a hardware-dependent
1599 * bus reset, then attempts to identify any devices found on
1600 * the bus.
1601 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07001602 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04001603 * PCI/etc. bus probe sem.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001604 *
1605 * RETURNS:
Tejun Heo96072e62006-04-01 01:38:17 +09001606 * Zero on success, negative errno otherwise.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001607 */
1608
Brian King80289162006-08-07 14:27:31 -05001609int ata_bus_probe(struct ata_port *ap)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001610{
Tejun Heo28ca5c52006-03-01 16:09:36 +09001611 unsigned int classes[ATA_MAX_DEVICES];
Tejun Heo14d2bac2006-04-02 17:54:46 +09001612 int tries[ATA_MAX_DEVICES];
1613 int i, rc, down_xfermask;
Tejun Heoe82cbdb2006-04-01 01:38:18 +09001614 struct ata_device *dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001615
Tejun Heo28ca5c52006-03-01 16:09:36 +09001616 ata_port_probe(ap);
1617
Tejun Heo14d2bac2006-04-02 17:54:46 +09001618 for (i = 0; i < ATA_MAX_DEVICES; i++)
1619 tries[i] = ATA_PROBE_MAX_TRIES;
1620
1621 retry:
1622 down_xfermask = 0;
1623
Tejun Heo20444702006-03-13 01:57:01 +09001624 /* reset and determine device classes */
Tejun Heo52783c52006-05-31 18:28:22 +09001625 ap->ops->phy_reset(ap);
Tejun Heo2061a472006-03-12 00:57:39 +09001626
Tejun Heo52783c52006-05-31 18:28:22 +09001627 for (i = 0; i < ATA_MAX_DEVICES; i++) {
1628 dev = &ap->device[i];
Tejun Heoc19ba8a2006-01-24 17:05:22 +09001629
Tejun Heo52783c52006-05-31 18:28:22 +09001630 if (!(ap->flags & ATA_FLAG_DISABLED) &&
1631 dev->class != ATA_DEV_UNKNOWN)
1632 classes[dev->devno] = dev->class;
1633 else
1634 classes[dev->devno] = ATA_DEV_NONE;
Tejun Heo20444702006-03-13 01:57:01 +09001635
Tejun Heo52783c52006-05-31 18:28:22 +09001636 dev->class = ATA_DEV_UNKNOWN;
Tejun Heo28ca5c52006-03-01 16:09:36 +09001637 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001638
Tejun Heo52783c52006-05-31 18:28:22 +09001639 ata_port_probe(ap);
Tejun Heo20444702006-03-13 01:57:01 +09001640
Alan Coxb6079ca2006-05-22 16:52:06 +01001641 /* after the reset the device state is PIO 0 and the controller
1642 state is undefined. Record the mode */
1643
1644 for (i = 0; i < ATA_MAX_DEVICES; i++)
1645 ap->device[i].pio_mode = XFER_PIO_0;
1646
Tejun Heo28ca5c52006-03-01 16:09:36 +09001647 /* read IDENTIFY page and configure devices */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001648 for (i = 0; i < ATA_MAX_DEVICES; i++) {
Tejun Heoe82cbdb2006-04-01 01:38:18 +09001649 dev = &ap->device[i];
Tejun Heo28ca5c52006-03-01 16:09:36 +09001650
Tejun Heoec573752006-04-11 22:26:29 +09001651 if (tries[i])
1652 dev->class = classes[i];
Tejun Heo14d2bac2006-04-02 17:54:46 +09001653
Tejun Heoe1211e32006-04-01 01:38:18 +09001654 if (!ata_dev_enabled(dev))
Tejun Heoffeae412006-03-01 16:09:35 +09001655 continue;
1656
Tejun Heobff04642006-11-10 18:08:10 +09001657 rc = ata_dev_read_id(dev, &dev->class, ATA_READID_POSTRESET,
1658 dev->id);
Tejun Heo14d2bac2006-04-02 17:54:46 +09001659 if (rc)
1660 goto fail;
Tejun Heoffeae412006-03-01 16:09:35 +09001661
Tejun Heoefdaedc2006-11-01 18:38:52 +09001662 ap->eh_context.i.flags |= ATA_EHI_PRINTINFO;
1663 rc = ata_dev_configure(dev);
1664 ap->eh_context.i.flags &= ~ATA_EHI_PRINTINFO;
Tejun Heo14d2bac2006-04-02 17:54:46 +09001665 if (rc)
1666 goto fail;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001667 }
1668
Tejun Heoe82cbdb2006-04-01 01:38:18 +09001669 /* configure transfer mode */
Tejun Heo3adcebb2006-05-15 20:57:37 +09001670 rc = ata_set_mode(ap, &dev);
Tejun Heo51713d32006-04-11 22:26:29 +09001671 if (rc) {
1672 down_xfermask = 1;
1673 goto fail;
Tejun Heoe82cbdb2006-04-01 01:38:18 +09001674 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001675
Tejun Heoe82cbdb2006-04-01 01:38:18 +09001676 for (i = 0; i < ATA_MAX_DEVICES; i++)
1677 if (ata_dev_enabled(&ap->device[i]))
1678 return 0;
Alan Coxe35a9e02006-03-27 18:46:37 +01001679
Tejun Heoe82cbdb2006-04-01 01:38:18 +09001680 /* no device present, disable port */
1681 ata_port_disable(ap);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001682 ap->ops->port_disable(ap);
Tejun Heo96072e62006-04-01 01:38:17 +09001683 return -ENODEV;
Tejun Heo14d2bac2006-04-02 17:54:46 +09001684
1685 fail:
1686 switch (rc) {
1687 case -EINVAL:
1688 case -ENODEV:
1689 tries[dev->devno] = 0;
1690 break;
1691 case -EIO:
Tejun Heo3c567b72006-05-15 20:57:23 +09001692 sata_down_spd_limit(ap);
Tejun Heo14d2bac2006-04-02 17:54:46 +09001693 /* fall through */
1694 default:
1695 tries[dev->devno]--;
1696 if (down_xfermask &&
Tejun Heo3373efd2006-05-15 20:57:53 +09001697 ata_down_xfermask_limit(dev, tries[dev->devno] == 1))
Tejun Heo14d2bac2006-04-02 17:54:46 +09001698 tries[dev->devno] = 0;
1699 }
1700
Tejun Heoec573752006-04-11 22:26:29 +09001701 if (!tries[dev->devno]) {
Tejun Heo3373efd2006-05-15 20:57:53 +09001702 ata_down_xfermask_limit(dev, 1);
1703 ata_dev_disable(dev);
Tejun Heoec573752006-04-11 22:26:29 +09001704 }
1705
Tejun Heo14d2bac2006-04-02 17:54:46 +09001706 goto retry;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001707}
1708
1709/**
Jeff Garzik0cba6322005-05-30 19:49:12 -04001710 * ata_port_probe - Mark port as enabled
1711 * @ap: Port for which we indicate enablement
Linus Torvalds1da177e2005-04-16 15:20:36 -07001712 *
Jeff Garzik0cba6322005-05-30 19:49:12 -04001713 * Modify @ap data structure such that the system
1714 * thinks that the entire port is enabled.
1715 *
Jeff Garzikcca39742006-08-24 03:19:22 -04001716 * LOCKING: host lock, or some other form of
Jeff Garzik0cba6322005-05-30 19:49:12 -04001717 * serialization.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001718 */
1719
1720void ata_port_probe(struct ata_port *ap)
1721{
Tejun Heo198e0fe2006-04-02 18:51:52 +09001722 ap->flags &= ~ATA_FLAG_DISABLED;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001723}
1724
1725/**
Tejun Heo3be680b2005-12-19 22:35:02 +09001726 * sata_print_link_status - Print SATA link status
1727 * @ap: SATA port to printk link status about
1728 *
1729 * This function prints link speed and status of a SATA link.
1730 *
1731 * LOCKING:
1732 * None.
1733 */
1734static void sata_print_link_status(struct ata_port *ap)
1735{
Tejun Heo6d5f9732006-04-03 00:09:41 +09001736 u32 sstatus, scontrol, tmp;
Tejun Heo3be680b2005-12-19 22:35:02 +09001737
Tejun Heo81952c52006-05-15 20:57:47 +09001738 if (sata_scr_read(ap, SCR_STATUS, &sstatus))
Tejun Heo3be680b2005-12-19 22:35:02 +09001739 return;
Tejun Heo81952c52006-05-15 20:57:47 +09001740 sata_scr_read(ap, SCR_CONTROL, &scontrol);
Tejun Heo3be680b2005-12-19 22:35:02 +09001741
Tejun Heo81952c52006-05-15 20:57:47 +09001742 if (ata_port_online(ap)) {
Tejun Heo3be680b2005-12-19 22:35:02 +09001743 tmp = (sstatus >> 4) & 0xf;
Tejun Heof15a1da2006-05-15 20:57:56 +09001744 ata_port_printk(ap, KERN_INFO,
1745 "SATA link up %s (SStatus %X SControl %X)\n",
1746 sata_spd_string(tmp), sstatus, scontrol);
Tejun Heo3be680b2005-12-19 22:35:02 +09001747 } else {
Tejun Heof15a1da2006-05-15 20:57:56 +09001748 ata_port_printk(ap, KERN_INFO,
1749 "SATA link down (SStatus %X SControl %X)\n",
1750 sstatus, scontrol);
Tejun Heo3be680b2005-12-19 22:35:02 +09001751 }
1752}
1753
1754/**
Jeff Garzik780a87f2005-05-30 15:41:05 -04001755 * __sata_phy_reset - Wake/reset a low-level SATA PHY
1756 * @ap: SATA port associated with target SATA PHY.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001757 *
Jeff Garzik780a87f2005-05-30 15:41:05 -04001758 * This function issues commands to standard SATA Sxxx
1759 * PHY registers, to wake up the phy (and device), and
1760 * clear any reset condition.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001761 *
1762 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04001763 * PCI/etc. bus probe sem.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001764 *
1765 */
1766void __sata_phy_reset(struct ata_port *ap)
1767{
1768 u32 sstatus;
1769 unsigned long timeout = jiffies + (HZ * 5);
1770
1771 if (ap->flags & ATA_FLAG_SATA_RESET) {
Brett Russcdcca89e2005-03-28 15:10:27 -05001772 /* issue phy wake/reset */
Tejun Heo81952c52006-05-15 20:57:47 +09001773 sata_scr_write_flush(ap, SCR_CONTROL, 0x301);
Tejun Heo62ba2842005-06-26 23:27:19 +09001774 /* Couldn't find anything in SATA I/II specs, but
1775 * AHCI-1.1 10.4.2 says at least 1 ms. */
1776 mdelay(1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001777 }
Tejun Heo81952c52006-05-15 20:57:47 +09001778 /* phy wake/clear reset */
1779 sata_scr_write_flush(ap, SCR_CONTROL, 0x300);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001780
1781 /* wait for phy to become ready, if necessary */
1782 do {
1783 msleep(200);
Tejun Heo81952c52006-05-15 20:57:47 +09001784 sata_scr_read(ap, SCR_STATUS, &sstatus);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001785 if ((sstatus & 0xf) != 1)
1786 break;
1787 } while (time_before(jiffies, timeout));
1788
Tejun Heo3be680b2005-12-19 22:35:02 +09001789 /* print link status */
1790 sata_print_link_status(ap);
Jeff Garzik656563e2005-11-20 03:36:45 -05001791
Tejun Heo3be680b2005-12-19 22:35:02 +09001792 /* TODO: phy layer with polling, timeouts, etc. */
Tejun Heo81952c52006-05-15 20:57:47 +09001793 if (!ata_port_offline(ap))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001794 ata_port_probe(ap);
Tejun Heo3be680b2005-12-19 22:35:02 +09001795 else
Linus Torvalds1da177e2005-04-16 15:20:36 -07001796 ata_port_disable(ap);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001797
Tejun Heo198e0fe2006-04-02 18:51:52 +09001798 if (ap->flags & ATA_FLAG_DISABLED)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001799 return;
1800
1801 if (ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT)) {
1802 ata_port_disable(ap);
1803 return;
1804 }
1805
1806 ap->cbl = ATA_CBL_SATA;
1807}
1808
1809/**
Jeff Garzik780a87f2005-05-30 15:41:05 -04001810 * sata_phy_reset - Reset SATA bus.
1811 * @ap: SATA port associated with target SATA PHY.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001812 *
Jeff Garzik780a87f2005-05-30 15:41:05 -04001813 * This function resets the SATA bus, and then probes
1814 * the bus for devices.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001815 *
1816 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04001817 * PCI/etc. bus probe sem.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001818 *
1819 */
1820void sata_phy_reset(struct ata_port *ap)
1821{
1822 __sata_phy_reset(ap);
Tejun Heo198e0fe2006-04-02 18:51:52 +09001823 if (ap->flags & ATA_FLAG_DISABLED)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001824 return;
1825 ata_bus_reset(ap);
1826}
1827
1828/**
Alan Coxebdfca62006-03-23 15:38:34 +00001829 * ata_dev_pair - return other device on cable
Alan Coxebdfca62006-03-23 15:38:34 +00001830 * @adev: device
1831 *
1832 * Obtain the other device on the same cable, or if none is
1833 * present NULL is returned
1834 */
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05001835
Tejun Heo3373efd2006-05-15 20:57:53 +09001836struct ata_device *ata_dev_pair(struct ata_device *adev)
Alan Coxebdfca62006-03-23 15:38:34 +00001837{
Tejun Heo3373efd2006-05-15 20:57:53 +09001838 struct ata_port *ap = adev->ap;
Alan Coxebdfca62006-03-23 15:38:34 +00001839 struct ata_device *pair = &ap->device[1 - adev->devno];
Tejun Heoe1211e32006-04-01 01:38:18 +09001840 if (!ata_dev_enabled(pair))
Alan Coxebdfca62006-03-23 15:38:34 +00001841 return NULL;
1842 return pair;
1843}
1844
1845/**
Jeff Garzik780a87f2005-05-30 15:41:05 -04001846 * ata_port_disable - Disable port.
1847 * @ap: Port to be disabled.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001848 *
Jeff Garzik780a87f2005-05-30 15:41:05 -04001849 * Modify @ap data structure such that the system
1850 * thinks that the entire port is disabled, and should
1851 * never attempt to probe or communicate with devices
1852 * on this port.
1853 *
Jeff Garzikcca39742006-08-24 03:19:22 -04001854 * LOCKING: host lock, or some other form of
Jeff Garzik780a87f2005-05-30 15:41:05 -04001855 * serialization.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001856 */
1857
1858void ata_port_disable(struct ata_port *ap)
1859{
1860 ap->device[0].class = ATA_DEV_NONE;
1861 ap->device[1].class = ATA_DEV_NONE;
Tejun Heo198e0fe2006-04-02 18:51:52 +09001862 ap->flags |= ATA_FLAG_DISABLED;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001863}
1864
Tejun Heo1c3fae42006-04-02 20:53:28 +09001865/**
Tejun Heo3c567b72006-05-15 20:57:23 +09001866 * sata_down_spd_limit - adjust SATA spd limit downward
Tejun Heo1c3fae42006-04-02 20:53:28 +09001867 * @ap: Port to adjust SATA spd limit for
1868 *
1869 * Adjust SATA spd limit of @ap downward. Note that this
1870 * function only adjusts the limit. The change must be applied
Tejun Heo3c567b72006-05-15 20:57:23 +09001871 * using sata_set_spd().
Tejun Heo1c3fae42006-04-02 20:53:28 +09001872 *
1873 * LOCKING:
1874 * Inherited from caller.
1875 *
1876 * RETURNS:
1877 * 0 on success, negative errno on failure
1878 */
Tejun Heo3c567b72006-05-15 20:57:23 +09001879int sata_down_spd_limit(struct ata_port *ap)
Tejun Heo1c3fae42006-04-02 20:53:28 +09001880{
Tejun Heo81952c52006-05-15 20:57:47 +09001881 u32 sstatus, spd, mask;
1882 int rc, highbit;
Tejun Heo1c3fae42006-04-02 20:53:28 +09001883
Tejun Heo81952c52006-05-15 20:57:47 +09001884 rc = sata_scr_read(ap, SCR_STATUS, &sstatus);
1885 if (rc)
1886 return rc;
Tejun Heo1c3fae42006-04-02 20:53:28 +09001887
1888 mask = ap->sata_spd_limit;
1889 if (mask <= 1)
1890 return -EINVAL;
1891 highbit = fls(mask) - 1;
1892 mask &= ~(1 << highbit);
1893
Tejun Heo81952c52006-05-15 20:57:47 +09001894 spd = (sstatus >> 4) & 0xf;
Tejun Heo1c3fae42006-04-02 20:53:28 +09001895 if (spd <= 1)
1896 return -EINVAL;
1897 spd--;
1898 mask &= (1 << spd) - 1;
1899 if (!mask)
1900 return -EINVAL;
1901
1902 ap->sata_spd_limit = mask;
1903
Tejun Heof15a1da2006-05-15 20:57:56 +09001904 ata_port_printk(ap, KERN_WARNING, "limiting SATA link speed to %s\n",
1905 sata_spd_string(fls(mask)));
Tejun Heo1c3fae42006-04-02 20:53:28 +09001906
1907 return 0;
1908}
1909
Tejun Heo3c567b72006-05-15 20:57:23 +09001910static int __sata_set_spd_needed(struct ata_port *ap, u32 *scontrol)
Tejun Heo1c3fae42006-04-02 20:53:28 +09001911{
1912 u32 spd, limit;
1913
1914 if (ap->sata_spd_limit == UINT_MAX)
1915 limit = 0;
1916 else
1917 limit = fls(ap->sata_spd_limit);
1918
1919 spd = (*scontrol >> 4) & 0xf;
1920 *scontrol = (*scontrol & ~0xf0) | ((limit & 0xf) << 4);
1921
1922 return spd != limit;
1923}
1924
1925/**
Tejun Heo3c567b72006-05-15 20:57:23 +09001926 * sata_set_spd_needed - is SATA spd configuration needed
Tejun Heo1c3fae42006-04-02 20:53:28 +09001927 * @ap: Port in question
1928 *
1929 * Test whether the spd limit in SControl matches
1930 * @ap->sata_spd_limit. This function is used to determine
1931 * whether hardreset is necessary to apply SATA spd
1932 * configuration.
1933 *
1934 * LOCKING:
1935 * Inherited from caller.
1936 *
1937 * RETURNS:
1938 * 1 if SATA spd configuration is needed, 0 otherwise.
1939 */
Tejun Heo3c567b72006-05-15 20:57:23 +09001940int sata_set_spd_needed(struct ata_port *ap)
Tejun Heo1c3fae42006-04-02 20:53:28 +09001941{
1942 u32 scontrol;
1943
Tejun Heo81952c52006-05-15 20:57:47 +09001944 if (sata_scr_read(ap, SCR_CONTROL, &scontrol))
Tejun Heo1c3fae42006-04-02 20:53:28 +09001945 return 0;
1946
Tejun Heo3c567b72006-05-15 20:57:23 +09001947 return __sata_set_spd_needed(ap, &scontrol);
Tejun Heo1c3fae42006-04-02 20:53:28 +09001948}
1949
1950/**
Tejun Heo3c567b72006-05-15 20:57:23 +09001951 * sata_set_spd - set SATA spd according to spd limit
Tejun Heo1c3fae42006-04-02 20:53:28 +09001952 * @ap: Port to set SATA spd for
1953 *
1954 * Set SATA spd of @ap according to sata_spd_limit.
1955 *
1956 * LOCKING:
1957 * Inherited from caller.
1958 *
1959 * RETURNS:
1960 * 0 if spd doesn't need to be changed, 1 if spd has been
Tejun Heo81952c52006-05-15 20:57:47 +09001961 * changed. Negative errno if SCR registers are inaccessible.
Tejun Heo1c3fae42006-04-02 20:53:28 +09001962 */
Tejun Heo3c567b72006-05-15 20:57:23 +09001963int sata_set_spd(struct ata_port *ap)
Tejun Heo1c3fae42006-04-02 20:53:28 +09001964{
1965 u32 scontrol;
Tejun Heo81952c52006-05-15 20:57:47 +09001966 int rc;
Tejun Heo1c3fae42006-04-02 20:53:28 +09001967
Tejun Heo81952c52006-05-15 20:57:47 +09001968 if ((rc = sata_scr_read(ap, SCR_CONTROL, &scontrol)))
1969 return rc;
Tejun Heo1c3fae42006-04-02 20:53:28 +09001970
Tejun Heo3c567b72006-05-15 20:57:23 +09001971 if (!__sata_set_spd_needed(ap, &scontrol))
Tejun Heo1c3fae42006-04-02 20:53:28 +09001972 return 0;
1973
Tejun Heo81952c52006-05-15 20:57:47 +09001974 if ((rc = sata_scr_write(ap, SCR_CONTROL, scontrol)))
1975 return rc;
1976
Tejun Heo1c3fae42006-04-02 20:53:28 +09001977 return 1;
1978}
1979
Alan Cox452503f2005-10-21 19:01:32 -04001980/*
1981 * This mode timing computation functionality is ported over from
1982 * drivers/ide/ide-timing.h and was originally written by Vojtech Pavlik
1983 */
1984/*
Alan Coxb352e572006-08-10 18:52:12 +01001985 * PIO 0-4, MWDMA 0-2 and UDMA 0-6 timings (in nanoseconds).
Alan Cox452503f2005-10-21 19:01:32 -04001986 * These were taken from ATA/ATAPI-6 standard, rev 0a, except
Alan Coxb352e572006-08-10 18:52:12 +01001987 * for UDMA6, which is currently supported only by Maxtor drives.
1988 *
1989 * For PIO 5/6 MWDMA 3/4 see the CFA specification 3.0.
Alan Cox452503f2005-10-21 19:01:32 -04001990 */
1991
1992static const struct ata_timing ata_timing[] = {
1993
1994 { XFER_UDMA_6, 0, 0, 0, 0, 0, 0, 0, 15 },
1995 { XFER_UDMA_5, 0, 0, 0, 0, 0, 0, 0, 20 },
1996 { XFER_UDMA_4, 0, 0, 0, 0, 0, 0, 0, 30 },
1997 { XFER_UDMA_3, 0, 0, 0, 0, 0, 0, 0, 45 },
1998
Alan Coxb352e572006-08-10 18:52:12 +01001999 { XFER_MW_DMA_4, 25, 0, 0, 0, 55, 20, 80, 0 },
2000 { XFER_MW_DMA_3, 25, 0, 0, 0, 65, 25, 100, 0 },
Alan Cox452503f2005-10-21 19:01:32 -04002001 { XFER_UDMA_2, 0, 0, 0, 0, 0, 0, 0, 60 },
2002 { XFER_UDMA_1, 0, 0, 0, 0, 0, 0, 0, 80 },
2003 { XFER_UDMA_0, 0, 0, 0, 0, 0, 0, 0, 120 },
2004
2005/* { XFER_UDMA_SLOW, 0, 0, 0, 0, 0, 0, 0, 150 }, */
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05002006
Alan Cox452503f2005-10-21 19:01:32 -04002007 { XFER_MW_DMA_2, 25, 0, 0, 0, 70, 25, 120, 0 },
2008 { XFER_MW_DMA_1, 45, 0, 0, 0, 80, 50, 150, 0 },
2009 { XFER_MW_DMA_0, 60, 0, 0, 0, 215, 215, 480, 0 },
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05002010
Alan Cox452503f2005-10-21 19:01:32 -04002011 { XFER_SW_DMA_2, 60, 0, 0, 0, 120, 120, 240, 0 },
2012 { XFER_SW_DMA_1, 90, 0, 0, 0, 240, 240, 480, 0 },
2013 { XFER_SW_DMA_0, 120, 0, 0, 0, 480, 480, 960, 0 },
2014
Alan Coxb352e572006-08-10 18:52:12 +01002015 { XFER_PIO_6, 10, 55, 20, 80, 55, 20, 80, 0 },
2016 { XFER_PIO_5, 15, 65, 25, 100, 65, 25, 100, 0 },
Alan Cox452503f2005-10-21 19:01:32 -04002017 { XFER_PIO_4, 25, 70, 25, 120, 70, 25, 120, 0 },
2018 { XFER_PIO_3, 30, 80, 70, 180, 80, 70, 180, 0 },
2019
2020 { XFER_PIO_2, 30, 290, 40, 330, 100, 90, 240, 0 },
2021 { XFER_PIO_1, 50, 290, 93, 383, 125, 100, 383, 0 },
2022 { XFER_PIO_0, 70, 290, 240, 600, 165, 150, 600, 0 },
2023
2024/* { XFER_PIO_SLOW, 120, 290, 240, 960, 290, 240, 960, 0 }, */
2025
2026 { 0xFF }
2027};
2028
2029#define ENOUGH(v,unit) (((v)-1)/(unit)+1)
2030#define EZ(v,unit) ((v)?ENOUGH(v,unit):0)
2031
2032static void ata_timing_quantize(const struct ata_timing *t, struct ata_timing *q, int T, int UT)
2033{
2034 q->setup = EZ(t->setup * 1000, T);
2035 q->act8b = EZ(t->act8b * 1000, T);
2036 q->rec8b = EZ(t->rec8b * 1000, T);
2037 q->cyc8b = EZ(t->cyc8b * 1000, T);
2038 q->active = EZ(t->active * 1000, T);
2039 q->recover = EZ(t->recover * 1000, T);
2040 q->cycle = EZ(t->cycle * 1000, T);
2041 q->udma = EZ(t->udma * 1000, UT);
2042}
2043
2044void ata_timing_merge(const struct ata_timing *a, const struct ata_timing *b,
2045 struct ata_timing *m, unsigned int what)
2046{
2047 if (what & ATA_TIMING_SETUP ) m->setup = max(a->setup, b->setup);
2048 if (what & ATA_TIMING_ACT8B ) m->act8b = max(a->act8b, b->act8b);
2049 if (what & ATA_TIMING_REC8B ) m->rec8b = max(a->rec8b, b->rec8b);
2050 if (what & ATA_TIMING_CYC8B ) m->cyc8b = max(a->cyc8b, b->cyc8b);
2051 if (what & ATA_TIMING_ACTIVE ) m->active = max(a->active, b->active);
2052 if (what & ATA_TIMING_RECOVER) m->recover = max(a->recover, b->recover);
2053 if (what & ATA_TIMING_CYCLE ) m->cycle = max(a->cycle, b->cycle);
2054 if (what & ATA_TIMING_UDMA ) m->udma = max(a->udma, b->udma);
2055}
2056
2057static const struct ata_timing* ata_timing_find_mode(unsigned short speed)
2058{
2059 const struct ata_timing *t;
2060
2061 for (t = ata_timing; t->mode != speed; t++)
Alan Cox91190752005-10-26 12:17:46 -04002062 if (t->mode == 0xFF)
Alan Cox452503f2005-10-21 19:01:32 -04002063 return NULL;
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05002064 return t;
Alan Cox452503f2005-10-21 19:01:32 -04002065}
2066
2067int ata_timing_compute(struct ata_device *adev, unsigned short speed,
2068 struct ata_timing *t, int T, int UT)
2069{
2070 const struct ata_timing *s;
2071 struct ata_timing p;
2072
2073 /*
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05002074 * Find the mode.
Albert Lee75b1f2f2005-11-16 17:06:18 +08002075 */
Alan Cox452503f2005-10-21 19:01:32 -04002076
2077 if (!(s = ata_timing_find_mode(speed)))
2078 return -EINVAL;
2079
Albert Lee75b1f2f2005-11-16 17:06:18 +08002080 memcpy(t, s, sizeof(*s));
2081
Alan Cox452503f2005-10-21 19:01:32 -04002082 /*
2083 * If the drive is an EIDE drive, it can tell us it needs extended
2084 * PIO/MW_DMA cycle timing.
2085 */
2086
2087 if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE drive */
2088 memset(&p, 0, sizeof(p));
2089 if(speed >= XFER_PIO_0 && speed <= XFER_SW_DMA_0) {
2090 if (speed <= XFER_PIO_2) p.cycle = p.cyc8b = adev->id[ATA_ID_EIDE_PIO];
2091 else p.cycle = p.cyc8b = adev->id[ATA_ID_EIDE_PIO_IORDY];
2092 } else if(speed >= XFER_MW_DMA_0 && speed <= XFER_MW_DMA_2) {
2093 p.cycle = adev->id[ATA_ID_EIDE_DMA_MIN];
2094 }
2095 ata_timing_merge(&p, t, t, ATA_TIMING_CYCLE | ATA_TIMING_CYC8B);
2096 }
2097
2098 /*
2099 * Convert the timing to bus clock counts.
2100 */
2101
Albert Lee75b1f2f2005-11-16 17:06:18 +08002102 ata_timing_quantize(t, t, T, UT);
Alan Cox452503f2005-10-21 19:01:32 -04002103
2104 /*
Randy Dunlapc893a3a2006-01-28 13:15:32 -05002105 * Even in DMA/UDMA modes we still use PIO access for IDENTIFY,
2106 * S.M.A.R.T * and some other commands. We have to ensure that the
2107 * DMA cycle timing is slower/equal than the fastest PIO timing.
Alan Cox452503f2005-10-21 19:01:32 -04002108 */
2109
2110 if (speed > XFER_PIO_4) {
2111 ata_timing_compute(adev, adev->pio_mode, &p, T, UT);
2112 ata_timing_merge(&p, t, t, ATA_TIMING_ALL);
2113 }
2114
2115 /*
Randy Dunlapc893a3a2006-01-28 13:15:32 -05002116 * Lengthen active & recovery time so that cycle time is correct.
Alan Cox452503f2005-10-21 19:01:32 -04002117 */
2118
2119 if (t->act8b + t->rec8b < t->cyc8b) {
2120 t->act8b += (t->cyc8b - (t->act8b + t->rec8b)) / 2;
2121 t->rec8b = t->cyc8b - t->act8b;
2122 }
2123
2124 if (t->active + t->recover < t->cycle) {
2125 t->active += (t->cycle - (t->active + t->recover)) / 2;
2126 t->recover = t->cycle - t->active;
2127 }
2128
2129 return 0;
2130}
2131
Tejun Heocf176e12006-04-02 17:54:46 +09002132/**
2133 * ata_down_xfermask_limit - adjust dev xfer masks downward
Tejun Heocf176e12006-04-02 17:54:46 +09002134 * @dev: Device to adjust xfer masks
2135 * @force_pio0: Force PIO0
2136 *
2137 * Adjust xfer masks of @dev downward. Note that this function
2138 * does not apply the change. Invoking ata_set_mode() afterwards
2139 * will apply the limit.
2140 *
2141 * LOCKING:
2142 * Inherited from caller.
2143 *
2144 * RETURNS:
2145 * 0 on success, negative errno on failure
2146 */
Tejun Heo3373efd2006-05-15 20:57:53 +09002147int ata_down_xfermask_limit(struct ata_device *dev, int force_pio0)
Tejun Heocf176e12006-04-02 17:54:46 +09002148{
2149 unsigned long xfer_mask;
2150 int highbit;
2151
2152 xfer_mask = ata_pack_xfermask(dev->pio_mask, dev->mwdma_mask,
2153 dev->udma_mask);
2154
2155 if (!xfer_mask)
2156 goto fail;
2157 /* don't gear down to MWDMA from UDMA, go directly to PIO */
2158 if (xfer_mask & ATA_MASK_UDMA)
2159 xfer_mask &= ~ATA_MASK_MWDMA;
2160
2161 highbit = fls(xfer_mask) - 1;
2162 xfer_mask &= ~(1 << highbit);
2163 if (force_pio0)
2164 xfer_mask &= 1 << ATA_SHIFT_PIO;
2165 if (!xfer_mask)
2166 goto fail;
2167
2168 ata_unpack_xfermask(xfer_mask, &dev->pio_mask, &dev->mwdma_mask,
2169 &dev->udma_mask);
2170
Tejun Heof15a1da2006-05-15 20:57:56 +09002171 ata_dev_printk(dev, KERN_WARNING, "limiting speed to %s\n",
2172 ata_mode_string(xfer_mask));
Tejun Heocf176e12006-04-02 17:54:46 +09002173
2174 return 0;
2175
2176 fail:
2177 return -EINVAL;
2178}
2179
Tejun Heo3373efd2006-05-15 20:57:53 +09002180static int ata_dev_set_mode(struct ata_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002181{
Tejun Heobaa1e782006-11-01 18:39:27 +09002182 struct ata_eh_context *ehc = &dev->ap->eh_context;
Tejun Heo83206a22006-03-24 15:25:31 +09002183 unsigned int err_mask;
2184 int rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002185
Tejun Heoe8384602006-04-02 18:51:53 +09002186 dev->flags &= ~ATA_DFLAG_PIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002187 if (dev->xfer_shift == ATA_SHIFT_PIO)
2188 dev->flags |= ATA_DFLAG_PIO;
2189
Tejun Heo3373efd2006-05-15 20:57:53 +09002190 err_mask = ata_dev_set_xfermode(dev);
Tejun Heo83206a22006-03-24 15:25:31 +09002191 if (err_mask) {
Tejun Heof15a1da2006-05-15 20:57:56 +09002192 ata_dev_printk(dev, KERN_ERR, "failed to set xfermode "
2193 "(err_mask=0x%x)\n", err_mask);
Tejun Heo83206a22006-03-24 15:25:31 +09002194 return -EIO;
2195 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002196
Tejun Heobaa1e782006-11-01 18:39:27 +09002197 ehc->i.flags |= ATA_EHI_POST_SETMODE;
Tejun Heo3373efd2006-05-15 20:57:53 +09002198 rc = ata_dev_revalidate(dev, 0);
Tejun Heobaa1e782006-11-01 18:39:27 +09002199 ehc->i.flags &= ~ATA_EHI_POST_SETMODE;
Tejun Heo5eb45c02006-04-02 18:51:52 +09002200 if (rc)
Tejun Heo83206a22006-03-24 15:25:31 +09002201 return rc;
Tejun Heo48a8a142006-03-05 17:55:58 +09002202
Tejun Heo23e71c32006-03-06 04:31:57 +09002203 DPRINTK("xfer_shift=%u, xfer_mode=0x%x\n",
2204 dev->xfer_shift, (int)dev->xfer_mode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002205
Tejun Heof15a1da2006-05-15 20:57:56 +09002206 ata_dev_printk(dev, KERN_INFO, "configured for %s\n",
2207 ata_mode_string(ata_xfer_mode2mask(dev->xfer_mode)));
Tejun Heo83206a22006-03-24 15:25:31 +09002208 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002209}
2210
Linus Torvalds1da177e2005-04-16 15:20:36 -07002211/**
2212 * ata_set_mode - Program timings and issue SET FEATURES - XFER
2213 * @ap: port on which timings will be programmed
Tejun Heoe82cbdb2006-04-01 01:38:18 +09002214 * @r_failed_dev: out paramter for failed device
Linus Torvalds1da177e2005-04-16 15:20:36 -07002215 *
Tejun Heoe82cbdb2006-04-01 01:38:18 +09002216 * Set ATA device disk transfer mode (PIO3, UDMA6, etc.). If
2217 * ata_set_mode() fails, pointer to the failing device is
2218 * returned in @r_failed_dev.
Jeff Garzik780a87f2005-05-30 15:41:05 -04002219 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07002220 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04002221 * PCI/etc. bus probe sem.
Tejun Heoe82cbdb2006-04-01 01:38:18 +09002222 *
2223 * RETURNS:
2224 * 0 on success, negative errno otherwise
Linus Torvalds1da177e2005-04-16 15:20:36 -07002225 */
Tejun Heo1ad8e7f2006-04-02 18:51:53 +09002226int ata_set_mode(struct ata_port *ap, struct ata_device **r_failed_dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002227{
Tejun Heoe8e06192006-04-01 01:38:18 +09002228 struct ata_device *dev;
Tejun Heoe82cbdb2006-04-01 01:38:18 +09002229 int i, rc = 0, used_dma = 0, found = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002230
Tejun Heo3adcebb2006-05-15 20:57:37 +09002231 /* has private set_mode? */
2232 if (ap->ops->set_mode) {
2233 /* FIXME: make ->set_mode handle no device case and
2234 * return error code and failing device on failure.
2235 */
2236 for (i = 0; i < ATA_MAX_DEVICES; i++) {
Tejun Heo02670bf2006-07-03 16:07:26 +09002237 if (ata_dev_ready(&ap->device[i])) {
Tejun Heo3adcebb2006-05-15 20:57:37 +09002238 ap->ops->set_mode(ap);
2239 break;
2240 }
2241 }
2242 return 0;
2243 }
2244
Tejun Heoa6d5a512006-03-06 04:31:57 +09002245 /* step 1: calculate xfer_mask */
2246 for (i = 0; i < ATA_MAX_DEVICES; i++) {
Tejun Heoacf356b2006-03-24 14:07:50 +09002247 unsigned int pio_mask, dma_mask;
Tejun Heoa6d5a512006-03-06 04:31:57 +09002248
Tejun Heoe8e06192006-04-01 01:38:18 +09002249 dev = &ap->device[i];
2250
Tejun Heoe1211e32006-04-01 01:38:18 +09002251 if (!ata_dev_enabled(dev))
Tejun Heoa6d5a512006-03-06 04:31:57 +09002252 continue;
2253
Tejun Heo3373efd2006-05-15 20:57:53 +09002254 ata_dev_xfermask(dev);
Tejun Heoa6d5a512006-03-06 04:31:57 +09002255
Tejun Heoacf356b2006-03-24 14:07:50 +09002256 pio_mask = ata_pack_xfermask(dev->pio_mask, 0, 0);
2257 dma_mask = ata_pack_xfermask(0, dev->mwdma_mask, dev->udma_mask);
2258 dev->pio_mode = ata_xfer_mask2mode(pio_mask);
2259 dev->dma_mode = ata_xfer_mask2mode(dma_mask);
Alan Cox5444a6f2006-03-27 18:58:20 +01002260
Tejun Heo4f659772006-04-01 01:38:18 +09002261 found = 1;
Alan Cox5444a6f2006-03-27 18:58:20 +01002262 if (dev->dma_mode)
2263 used_dma = 1;
Tejun Heoa6d5a512006-03-06 04:31:57 +09002264 }
Tejun Heo4f659772006-04-01 01:38:18 +09002265 if (!found)
Tejun Heoe82cbdb2006-04-01 01:38:18 +09002266 goto out;
Tejun Heoa6d5a512006-03-06 04:31:57 +09002267
2268 /* step 2: always set host PIO timings */
Tejun Heoe8e06192006-04-01 01:38:18 +09002269 for (i = 0; i < ATA_MAX_DEVICES; i++) {
2270 dev = &ap->device[i];
2271 if (!ata_dev_enabled(dev))
2272 continue;
2273
2274 if (!dev->pio_mode) {
Tejun Heof15a1da2006-05-15 20:57:56 +09002275 ata_dev_printk(dev, KERN_WARNING, "no PIO support\n");
Tejun Heoe8e06192006-04-01 01:38:18 +09002276 rc = -EINVAL;
Tejun Heoe82cbdb2006-04-01 01:38:18 +09002277 goto out;
Tejun Heoe8e06192006-04-01 01:38:18 +09002278 }
2279
2280 dev->xfer_mode = dev->pio_mode;
2281 dev->xfer_shift = ATA_SHIFT_PIO;
2282 if (ap->ops->set_piomode)
2283 ap->ops->set_piomode(ap, dev);
2284 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002285
Tejun Heoa6d5a512006-03-06 04:31:57 +09002286 /* step 3: set host DMA timings */
Tejun Heoe8e06192006-04-01 01:38:18 +09002287 for (i = 0; i < ATA_MAX_DEVICES; i++) {
2288 dev = &ap->device[i];
2289
2290 if (!ata_dev_enabled(dev) || !dev->dma_mode)
2291 continue;
2292
2293 dev->xfer_mode = dev->dma_mode;
2294 dev->xfer_shift = ata_xfer_mode2shift(dev->dma_mode);
2295 if (ap->ops->set_dmamode)
2296 ap->ops->set_dmamode(ap, dev);
2297 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002298
2299 /* step 4: update devices' xfer mode */
Tejun Heo83206a22006-03-24 15:25:31 +09002300 for (i = 0; i < ATA_MAX_DEVICES; i++) {
Tejun Heoe8e06192006-04-01 01:38:18 +09002301 dev = &ap->device[i];
Linus Torvalds1da177e2005-04-16 15:20:36 -07002302
Tejun Heo02670bf2006-07-03 16:07:26 +09002303 /* don't udpate suspended devices' xfer mode */
2304 if (!ata_dev_ready(dev))
Tejun Heo83206a22006-03-24 15:25:31 +09002305 continue;
2306
Tejun Heo3373efd2006-05-15 20:57:53 +09002307 rc = ata_dev_set_mode(dev);
Tejun Heo5bbc53f2006-04-01 01:38:17 +09002308 if (rc)
Tejun Heoe82cbdb2006-04-01 01:38:18 +09002309 goto out;
Tejun Heo83206a22006-03-24 15:25:31 +09002310 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002311
Tejun Heoe8e06192006-04-01 01:38:18 +09002312 /* Record simplex status. If we selected DMA then the other
2313 * host channels are not permitted to do so.
Alan Cox5444a6f2006-03-27 18:58:20 +01002314 */
Jeff Garzikcca39742006-08-24 03:19:22 -04002315 if (used_dma && (ap->host->flags & ATA_HOST_SIMPLEX))
2316 ap->host->simplex_claimed = 1;
Alan Cox5444a6f2006-03-27 18:58:20 +01002317
Tejun Heoe8e06192006-04-01 01:38:18 +09002318 /* step5: chip specific finalisation */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002319 if (ap->ops->post_set_mode)
2320 ap->ops->post_set_mode(ap);
2321
Tejun Heoe82cbdb2006-04-01 01:38:18 +09002322 out:
2323 if (rc)
2324 *r_failed_dev = dev;
2325 return rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002326}
2327
2328/**
Jeff Garzik1fdffbc2006-02-09 05:15:27 -05002329 * ata_tf_to_host - issue ATA taskfile to host controller
2330 * @ap: port to which command is being issued
2331 * @tf: ATA taskfile register set
2332 *
2333 * Issues ATA taskfile register set to ATA host controller,
2334 * with proper synchronization with interrupt handler and
2335 * other threads.
2336 *
2337 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04002338 * spin_lock_irqsave(host lock)
Jeff Garzik1fdffbc2006-02-09 05:15:27 -05002339 */
2340
2341static inline void ata_tf_to_host(struct ata_port *ap,
2342 const struct ata_taskfile *tf)
2343{
2344 ap->ops->tf_load(ap, tf);
2345 ap->ops->exec_command(ap, tf);
2346}
2347
2348/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07002349 * ata_busy_sleep - sleep until BSY clears, or timeout
2350 * @ap: port containing status register to be polled
2351 * @tmout_pat: impatience timeout
2352 * @tmout: overall timeout
2353 *
Jeff Garzik780a87f2005-05-30 15:41:05 -04002354 * Sleep until ATA Status register bit BSY clears,
2355 * or a timeout occurs.
2356 *
Tejun Heod1adc1b2006-10-09 18:32:15 +09002357 * LOCKING:
2358 * Kernel thread context (may sleep).
2359 *
2360 * RETURNS:
2361 * 0 on success, -errno otherwise.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002362 */
Tejun Heod1adc1b2006-10-09 18:32:15 +09002363int ata_busy_sleep(struct ata_port *ap,
2364 unsigned long tmout_pat, unsigned long tmout)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002365{
2366 unsigned long timer_start, timeout;
2367 u8 status;
2368
2369 status = ata_busy_wait(ap, ATA_BUSY, 300);
2370 timer_start = jiffies;
2371 timeout = timer_start + tmout_pat;
Tejun Heod1adc1b2006-10-09 18:32:15 +09002372 while (status != 0xff && (status & ATA_BUSY) &&
2373 time_before(jiffies, timeout)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002374 msleep(50);
2375 status = ata_busy_wait(ap, ATA_BUSY, 3);
2376 }
2377
Tejun Heod1adc1b2006-10-09 18:32:15 +09002378 if (status != 0xff && (status & ATA_BUSY))
Tejun Heof15a1da2006-05-15 20:57:56 +09002379 ata_port_printk(ap, KERN_WARNING,
Jeff Garzik35aa7a42006-09-28 06:50:24 -04002380 "port is slow to respond, please be patient "
2381 "(Status 0x%x)\n", status);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002382
2383 timeout = timer_start + tmout;
Tejun Heod1adc1b2006-10-09 18:32:15 +09002384 while (status != 0xff && (status & ATA_BUSY) &&
2385 time_before(jiffies, timeout)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002386 msleep(50);
2387 status = ata_chk_status(ap);
2388 }
2389
Tejun Heod1adc1b2006-10-09 18:32:15 +09002390 if (status == 0xff)
2391 return -ENODEV;
2392
Linus Torvalds1da177e2005-04-16 15:20:36 -07002393 if (status & ATA_BUSY) {
Tejun Heof15a1da2006-05-15 20:57:56 +09002394 ata_port_printk(ap, KERN_ERR, "port failed to respond "
Jeff Garzik35aa7a42006-09-28 06:50:24 -04002395 "(%lu secs, Status 0x%x)\n",
2396 tmout / HZ, status);
Tejun Heod1adc1b2006-10-09 18:32:15 +09002397 return -EBUSY;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002398 }
2399
2400 return 0;
2401}
2402
2403static void ata_bus_post_reset(struct ata_port *ap, unsigned int devmask)
2404{
2405 struct ata_ioports *ioaddr = &ap->ioaddr;
2406 unsigned int dev0 = devmask & (1 << 0);
2407 unsigned int dev1 = devmask & (1 << 1);
2408 unsigned long timeout;
2409
2410 /* if device 0 was found in ata_devchk, wait for its
2411 * BSY bit to clear
2412 */
2413 if (dev0)
2414 ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT);
2415
2416 /* if device 1 was found in ata_devchk, wait for
2417 * register access, then wait for BSY to clear
2418 */
2419 timeout = jiffies + ATA_TMOUT_BOOT;
2420 while (dev1) {
2421 u8 nsect, lbal;
2422
2423 ap->ops->dev_select(ap, 1);
2424 if (ap->flags & ATA_FLAG_MMIO) {
2425 nsect = readb((void __iomem *) ioaddr->nsect_addr);
2426 lbal = readb((void __iomem *) ioaddr->lbal_addr);
2427 } else {
2428 nsect = inb(ioaddr->nsect_addr);
2429 lbal = inb(ioaddr->lbal_addr);
2430 }
2431 if ((nsect == 1) && (lbal == 1))
2432 break;
2433 if (time_after(jiffies, timeout)) {
2434 dev1 = 0;
2435 break;
2436 }
2437 msleep(50); /* give drive a breather */
2438 }
2439 if (dev1)
2440 ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT);
2441
2442 /* is all this really necessary? */
2443 ap->ops->dev_select(ap, 0);
2444 if (dev1)
2445 ap->ops->dev_select(ap, 1);
2446 if (dev0)
2447 ap->ops->dev_select(ap, 0);
2448}
2449
Linus Torvalds1da177e2005-04-16 15:20:36 -07002450static unsigned int ata_bus_softreset(struct ata_port *ap,
2451 unsigned int devmask)
2452{
2453 struct ata_ioports *ioaddr = &ap->ioaddr;
2454
2455 DPRINTK("ata%u: bus reset via SRST\n", ap->id);
2456
2457 /* software reset. causes dev0 to be selected */
2458 if (ap->flags & ATA_FLAG_MMIO) {
2459 writeb(ap->ctl, (void __iomem *) ioaddr->ctl_addr);
2460 udelay(20); /* FIXME: flush */
2461 writeb(ap->ctl | ATA_SRST, (void __iomem *) ioaddr->ctl_addr);
2462 udelay(20); /* FIXME: flush */
2463 writeb(ap->ctl, (void __iomem *) ioaddr->ctl_addr);
2464 } else {
2465 outb(ap->ctl, ioaddr->ctl_addr);
2466 udelay(10);
2467 outb(ap->ctl | ATA_SRST, ioaddr->ctl_addr);
2468 udelay(10);
2469 outb(ap->ctl, ioaddr->ctl_addr);
2470 }
2471
2472 /* spec mandates ">= 2ms" before checking status.
2473 * We wait 150ms, because that was the magic delay used for
2474 * ATAPI devices in Hale Landis's ATADRVR, for the period of time
2475 * between when the ATA command register is written, and then
2476 * status is checked. Because waiting for "a while" before
2477 * checking status is fine, post SRST, we perform this magic
2478 * delay here as well.
Alan Cox09c7ad72006-03-22 15:52:40 +00002479 *
2480 * Old drivers/ide uses the 2mS rule and then waits for ready
Linus Torvalds1da177e2005-04-16 15:20:36 -07002481 */
2482 msleep(150);
2483
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05002484 /* Before we perform post reset processing we want to see if
Tejun Heo298a41c2006-03-25 02:58:13 +09002485 * the bus shows 0xFF because the odd clown forgets the D7
2486 * pulldown resistor.
2487 */
Tejun Heod1adc1b2006-10-09 18:32:15 +09002488 if (ata_check_status(ap) == 0xFF)
2489 return 0;
Alan Cox09c7ad72006-03-22 15:52:40 +00002490
Linus Torvalds1da177e2005-04-16 15:20:36 -07002491 ata_bus_post_reset(ap, devmask);
2492
2493 return 0;
2494}
2495
2496/**
2497 * ata_bus_reset - reset host port and associated ATA channel
2498 * @ap: port to reset
2499 *
2500 * This is typically the first time we actually start issuing
2501 * commands to the ATA channel. We wait for BSY to clear, then
2502 * issue EXECUTE DEVICE DIAGNOSTIC command, polling for its
2503 * result. Determine what devices, if any, are on the channel
2504 * by looking at the device 0/1 error register. Look at the signature
2505 * stored in each device's taskfile registers, to determine if
2506 * the device is ATA or ATAPI.
2507 *
2508 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04002509 * PCI/etc. bus probe sem.
Jeff Garzikcca39742006-08-24 03:19:22 -04002510 * Obtains host lock.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002511 *
2512 * SIDE EFFECTS:
Tejun Heo198e0fe2006-04-02 18:51:52 +09002513 * Sets ATA_FLAG_DISABLED if bus reset fails.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002514 */
2515
2516void ata_bus_reset(struct ata_port *ap)
2517{
2518 struct ata_ioports *ioaddr = &ap->ioaddr;
2519 unsigned int slave_possible = ap->flags & ATA_FLAG_SLAVE_POSS;
2520 u8 err;
Tejun Heoaec5c3c2006-03-25 01:33:34 +09002521 unsigned int dev0, dev1 = 0, devmask = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002522
2523 DPRINTK("ENTER, host %u, port %u\n", ap->id, ap->port_no);
2524
2525 /* determine if device 0/1 are present */
2526 if (ap->flags & ATA_FLAG_SATA_RESET)
2527 dev0 = 1;
2528 else {
2529 dev0 = ata_devchk(ap, 0);
2530 if (slave_possible)
2531 dev1 = ata_devchk(ap, 1);
2532 }
2533
2534 if (dev0)
2535 devmask |= (1 << 0);
2536 if (dev1)
2537 devmask |= (1 << 1);
2538
2539 /* select device 0 again */
2540 ap->ops->dev_select(ap, 0);
2541
2542 /* issue bus reset */
2543 if (ap->flags & ATA_FLAG_SRST)
Tejun Heoaec5c3c2006-03-25 01:33:34 +09002544 if (ata_bus_softreset(ap, devmask))
2545 goto err_out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002546
2547 /*
2548 * determine by signature whether we have ATA or ATAPI devices
2549 */
Tejun Heob4dc7622006-01-24 17:05:22 +09002550 ap->device[0].class = ata_dev_try_classify(ap, 0, &err);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002551 if ((slave_possible) && (err != 0x81))
Tejun Heob4dc7622006-01-24 17:05:22 +09002552 ap->device[1].class = ata_dev_try_classify(ap, 1, &err);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002553
2554 /* re-enable interrupts */
2555 if (ap->ioaddr.ctl_addr) /* FIXME: hack. create a hook instead */
2556 ata_irq_on(ap);
2557
2558 /* is double-select really necessary? */
2559 if (ap->device[1].class != ATA_DEV_NONE)
2560 ap->ops->dev_select(ap, 1);
2561 if (ap->device[0].class != ATA_DEV_NONE)
2562 ap->ops->dev_select(ap, 0);
2563
2564 /* if no devices were detected, disable this port */
2565 if ((ap->device[0].class == ATA_DEV_NONE) &&
2566 (ap->device[1].class == ATA_DEV_NONE))
2567 goto err_out;
2568
2569 if (ap->flags & (ATA_FLAG_SATA_RESET | ATA_FLAG_SRST)) {
2570 /* set up device control for ATA_FLAG_SATA_RESET */
2571 if (ap->flags & ATA_FLAG_MMIO)
2572 writeb(ap->ctl, (void __iomem *) ioaddr->ctl_addr);
2573 else
2574 outb(ap->ctl, ioaddr->ctl_addr);
2575 }
2576
2577 DPRINTK("EXIT\n");
2578 return;
2579
2580err_out:
Tejun Heof15a1da2006-05-15 20:57:56 +09002581 ata_port_printk(ap, KERN_ERR, "disabling port\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07002582 ap->ops->port_disable(ap);
2583
2584 DPRINTK("EXIT\n");
2585}
2586
Tejun Heod7bb4cc2006-05-31 18:27:46 +09002587/**
2588 * sata_phy_debounce - debounce SATA phy status
2589 * @ap: ATA port to debounce SATA phy status for
2590 * @params: timing parameters { interval, duratinon, timeout } in msec
2591 *
2592 * Make sure SStatus of @ap reaches stable state, determined by
2593 * holding the same value where DET is not 1 for @duration polled
2594 * every @interval, before @timeout. Timeout constraints the
2595 * beginning of the stable state. Because, after hot unplugging,
2596 * DET gets stuck at 1 on some controllers, this functions waits
2597 * until timeout then returns 0 if DET is stable at 1.
2598 *
2599 * LOCKING:
2600 * Kernel thread context (may sleep)
2601 *
2602 * RETURNS:
2603 * 0 on success, -errno on failure.
2604 */
2605int sata_phy_debounce(struct ata_port *ap, const unsigned long *params)
Tejun Heo7a7921e2006-02-02 18:20:00 +09002606{
Tejun Heod7bb4cc2006-05-31 18:27:46 +09002607 unsigned long interval_msec = params[0];
2608 unsigned long duration = params[1] * HZ / 1000;
2609 unsigned long timeout = jiffies + params[2] * HZ / 1000;
2610 unsigned long last_jiffies;
2611 u32 last, cur;
2612 int rc;
2613
2614 if ((rc = sata_scr_read(ap, SCR_STATUS, &cur)))
2615 return rc;
2616 cur &= 0xf;
2617
2618 last = cur;
2619 last_jiffies = jiffies;
2620
2621 while (1) {
2622 msleep(interval_msec);
2623 if ((rc = sata_scr_read(ap, SCR_STATUS, &cur)))
2624 return rc;
2625 cur &= 0xf;
2626
2627 /* DET stable? */
2628 if (cur == last) {
2629 if (cur == 1 && time_before(jiffies, timeout))
2630 continue;
2631 if (time_after(jiffies, last_jiffies + duration))
2632 return 0;
2633 continue;
2634 }
2635
2636 /* unstable, start over */
2637 last = cur;
2638 last_jiffies = jiffies;
2639
2640 /* check timeout */
2641 if (time_after(jiffies, timeout))
2642 return -EBUSY;
2643 }
2644}
2645
2646/**
2647 * sata_phy_resume - resume SATA phy
2648 * @ap: ATA port to resume SATA phy for
2649 * @params: timing parameters { interval, duratinon, timeout } in msec
2650 *
2651 * Resume SATA phy of @ap and debounce it.
2652 *
2653 * LOCKING:
2654 * Kernel thread context (may sleep)
2655 *
2656 * RETURNS:
2657 * 0 on success, -errno on failure.
2658 */
2659int sata_phy_resume(struct ata_port *ap, const unsigned long *params)
2660{
2661 u32 scontrol;
Tejun Heo81952c52006-05-15 20:57:47 +09002662 int rc;
Tejun Heo7a7921e2006-02-02 18:20:00 +09002663
Tejun Heo81952c52006-05-15 20:57:47 +09002664 if ((rc = sata_scr_read(ap, SCR_CONTROL, &scontrol)))
2665 return rc;
2666
Tejun Heo852ee162006-04-01 01:38:18 +09002667 scontrol = (scontrol & 0x0f0) | 0x300;
Tejun Heo81952c52006-05-15 20:57:47 +09002668
2669 if ((rc = sata_scr_write(ap, SCR_CONTROL, scontrol)))
2670 return rc;
Tejun Heo7a7921e2006-02-02 18:20:00 +09002671
Tejun Heod7bb4cc2006-05-31 18:27:46 +09002672 /* Some PHYs react badly if SStatus is pounded immediately
2673 * after resuming. Delay 200ms before debouncing.
2674 */
2675 msleep(200);
Tejun Heo7a7921e2006-02-02 18:20:00 +09002676
Tejun Heod7bb4cc2006-05-31 18:27:46 +09002677 return sata_phy_debounce(ap, params);
Tejun Heo7a7921e2006-02-02 18:20:00 +09002678}
2679
Tejun Heof5914a42006-05-31 18:27:48 +09002680static void ata_wait_spinup(struct ata_port *ap)
2681{
2682 struct ata_eh_context *ehc = &ap->eh_context;
2683 unsigned long end, secs;
2684 int rc;
2685
2686 /* first, debounce phy if SATA */
2687 if (ap->cbl == ATA_CBL_SATA) {
Tejun Heoe9c83912006-07-03 16:07:26 +09002688 rc = sata_phy_debounce(ap, sata_deb_timing_hotplug);
Tejun Heof5914a42006-05-31 18:27:48 +09002689
2690 /* if debounced successfully and offline, no need to wait */
2691 if ((rc == 0 || rc == -EOPNOTSUPP) && ata_port_offline(ap))
2692 return;
2693 }
2694
2695 /* okay, let's give the drive time to spin up */
2696 end = ehc->i.hotplug_timestamp + ATA_SPINUP_WAIT * HZ / 1000;
2697 secs = ((end - jiffies) + HZ - 1) / HZ;
2698
2699 if (time_after(jiffies, end))
2700 return;
2701
2702 if (secs > 5)
2703 ata_port_printk(ap, KERN_INFO, "waiting for device to spin up "
2704 "(%lu secs)\n", secs);
2705
2706 schedule_timeout_uninterruptible(end - jiffies);
2707}
2708
2709/**
2710 * ata_std_prereset - prepare for reset
2711 * @ap: ATA port to be reset
2712 *
2713 * @ap is about to be reset. Initialize it.
2714 *
2715 * LOCKING:
2716 * Kernel thread context (may sleep)
2717 *
2718 * RETURNS:
2719 * 0 on success, -errno otherwise.
2720 */
2721int ata_std_prereset(struct ata_port *ap)
2722{
2723 struct ata_eh_context *ehc = &ap->eh_context;
Tejun Heoe9c83912006-07-03 16:07:26 +09002724 const unsigned long *timing = sata_ehc_deb_timing(ehc);
Tejun Heof5914a42006-05-31 18:27:48 +09002725 int rc;
2726
Tejun Heo28324302006-07-03 16:07:26 +09002727 /* handle link resume & hotplug spinup */
2728 if ((ehc->i.flags & ATA_EHI_RESUME_LINK) &&
2729 (ap->flags & ATA_FLAG_HRST_TO_RESUME))
2730 ehc->i.action |= ATA_EH_HARDRESET;
2731
2732 if ((ehc->i.flags & ATA_EHI_HOTPLUGGED) &&
2733 (ap->flags & ATA_FLAG_SKIP_D2H_BSY))
2734 ata_wait_spinup(ap);
Tejun Heof5914a42006-05-31 18:27:48 +09002735
2736 /* if we're about to do hardreset, nothing more to do */
2737 if (ehc->i.action & ATA_EH_HARDRESET)
2738 return 0;
2739
2740 /* if SATA, resume phy */
2741 if (ap->cbl == ATA_CBL_SATA) {
Tejun Heof5914a42006-05-31 18:27:48 +09002742 rc = sata_phy_resume(ap, timing);
2743 if (rc && rc != -EOPNOTSUPP) {
2744 /* phy resume failed */
2745 ata_port_printk(ap, KERN_WARNING, "failed to resume "
2746 "link for reset (errno=%d)\n", rc);
2747 return rc;
2748 }
2749 }
2750
2751 /* Wait for !BSY if the controller can wait for the first D2H
2752 * Reg FIS and we don't know that no device is attached.
2753 */
2754 if (!(ap->flags & ATA_FLAG_SKIP_D2H_BSY) && !ata_port_offline(ap))
2755 ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT);
2756
2757 return 0;
2758}
2759
Tejun Heoc2bd5802006-01-24 17:05:22 +09002760/**
2761 * ata_std_softreset - reset host port via ATA SRST
2762 * @ap: port to reset
Tejun Heoc2bd5802006-01-24 17:05:22 +09002763 * @classes: resulting classes of attached devices
2764 *
Tejun Heo52783c52006-05-31 18:28:22 +09002765 * Reset host port using ATA SRST.
Tejun Heoc2bd5802006-01-24 17:05:22 +09002766 *
2767 * LOCKING:
2768 * Kernel thread context (may sleep)
2769 *
2770 * RETURNS:
2771 * 0 on success, -errno otherwise.
2772 */
Tejun Heo2bf2cb22006-04-11 22:16:45 +09002773int ata_std_softreset(struct ata_port *ap, unsigned int *classes)
Tejun Heoc2bd5802006-01-24 17:05:22 +09002774{
2775 unsigned int slave_possible = ap->flags & ATA_FLAG_SLAVE_POSS;
2776 unsigned int devmask = 0, err_mask;
2777 u8 err;
2778
2779 DPRINTK("ENTER\n");
2780
Tejun Heo81952c52006-05-15 20:57:47 +09002781 if (ata_port_offline(ap)) {
Tejun Heo3a397462006-02-10 23:58:48 +09002782 classes[0] = ATA_DEV_NONE;
2783 goto out;
2784 }
2785
Tejun Heoc2bd5802006-01-24 17:05:22 +09002786 /* determine if device 0/1 are present */
2787 if (ata_devchk(ap, 0))
2788 devmask |= (1 << 0);
2789 if (slave_possible && ata_devchk(ap, 1))
2790 devmask |= (1 << 1);
2791
Tejun Heoc2bd5802006-01-24 17:05:22 +09002792 /* select device 0 again */
2793 ap->ops->dev_select(ap, 0);
2794
2795 /* issue bus reset */
2796 DPRINTK("about to softreset, devmask=%x\n", devmask);
2797 err_mask = ata_bus_softreset(ap, devmask);
2798 if (err_mask) {
Tejun Heof15a1da2006-05-15 20:57:56 +09002799 ata_port_printk(ap, KERN_ERR, "SRST failed (err_mask=0x%x)\n",
2800 err_mask);
Tejun Heoc2bd5802006-01-24 17:05:22 +09002801 return -EIO;
2802 }
2803
2804 /* determine by signature whether we have ATA or ATAPI devices */
2805 classes[0] = ata_dev_try_classify(ap, 0, &err);
2806 if (slave_possible && err != 0x81)
2807 classes[1] = ata_dev_try_classify(ap, 1, &err);
2808
Tejun Heo3a397462006-02-10 23:58:48 +09002809 out:
Tejun Heoc2bd5802006-01-24 17:05:22 +09002810 DPRINTK("EXIT, classes[0]=%u [1]=%u\n", classes[0], classes[1]);
2811 return 0;
2812}
2813
2814/**
Tejun Heob6103f62006-11-01 17:59:53 +09002815 * sata_port_hardreset - reset port via SATA phy reset
Tejun Heoc2bd5802006-01-24 17:05:22 +09002816 * @ap: port to reset
Tejun Heob6103f62006-11-01 17:59:53 +09002817 * @timing: timing parameters { interval, duratinon, timeout } in msec
Tejun Heoc2bd5802006-01-24 17:05:22 +09002818 *
2819 * SATA phy-reset host port using DET bits of SControl register.
Tejun Heoc2bd5802006-01-24 17:05:22 +09002820 *
2821 * LOCKING:
2822 * Kernel thread context (may sleep)
2823 *
2824 * RETURNS:
2825 * 0 on success, -errno otherwise.
2826 */
Tejun Heob6103f62006-11-01 17:59:53 +09002827int sata_port_hardreset(struct ata_port *ap, const unsigned long *timing)
Tejun Heoc2bd5802006-01-24 17:05:22 +09002828{
Tejun Heo852ee162006-04-01 01:38:18 +09002829 u32 scontrol;
Tejun Heo81952c52006-05-15 20:57:47 +09002830 int rc;
Tejun Heo852ee162006-04-01 01:38:18 +09002831
Tejun Heoc2bd5802006-01-24 17:05:22 +09002832 DPRINTK("ENTER\n");
2833
Tejun Heo3c567b72006-05-15 20:57:23 +09002834 if (sata_set_spd_needed(ap)) {
Tejun Heo1c3fae42006-04-02 20:53:28 +09002835 /* SATA spec says nothing about how to reconfigure
2836 * spd. To be on the safe side, turn off phy during
2837 * reconfiguration. This works for at least ICH7 AHCI
2838 * and Sil3124.
2839 */
Tejun Heo81952c52006-05-15 20:57:47 +09002840 if ((rc = sata_scr_read(ap, SCR_CONTROL, &scontrol)))
Tejun Heob6103f62006-11-01 17:59:53 +09002841 goto out;
Tejun Heo81952c52006-05-15 20:57:47 +09002842
Martin Hicksa34b6fc2006-07-05 15:06:13 -04002843 scontrol = (scontrol & 0x0f0) | 0x304;
Tejun Heo81952c52006-05-15 20:57:47 +09002844
2845 if ((rc = sata_scr_write(ap, SCR_CONTROL, scontrol)))
Tejun Heob6103f62006-11-01 17:59:53 +09002846 goto out;
Tejun Heo1c3fae42006-04-02 20:53:28 +09002847
Tejun Heo3c567b72006-05-15 20:57:23 +09002848 sata_set_spd(ap);
Tejun Heo1c3fae42006-04-02 20:53:28 +09002849 }
2850
2851 /* issue phy wake/reset */
Tejun Heo81952c52006-05-15 20:57:47 +09002852 if ((rc = sata_scr_read(ap, SCR_CONTROL, &scontrol)))
Tejun Heob6103f62006-11-01 17:59:53 +09002853 goto out;
Tejun Heo81952c52006-05-15 20:57:47 +09002854
Tejun Heo852ee162006-04-01 01:38:18 +09002855 scontrol = (scontrol & 0x0f0) | 0x301;
Tejun Heo81952c52006-05-15 20:57:47 +09002856
2857 if ((rc = sata_scr_write_flush(ap, SCR_CONTROL, scontrol)))
Tejun Heob6103f62006-11-01 17:59:53 +09002858 goto out;
Tejun Heoc2bd5802006-01-24 17:05:22 +09002859
Tejun Heo1c3fae42006-04-02 20:53:28 +09002860 /* Couldn't find anything in SATA I/II specs, but AHCI-1.1
Tejun Heoc2bd5802006-01-24 17:05:22 +09002861 * 10.4.2 says at least 1 ms.
2862 */
2863 msleep(1);
2864
Tejun Heo1c3fae42006-04-02 20:53:28 +09002865 /* bring phy back */
Tejun Heob6103f62006-11-01 17:59:53 +09002866 rc = sata_phy_resume(ap, timing);
2867 out:
2868 DPRINTK("EXIT, rc=%d\n", rc);
2869 return rc;
2870}
2871
2872/**
2873 * sata_std_hardreset - reset host port via SATA phy reset
2874 * @ap: port to reset
2875 * @class: resulting class of attached device
2876 *
2877 * SATA phy-reset host port using DET bits of SControl register,
2878 * wait for !BSY and classify the attached device.
2879 *
2880 * LOCKING:
2881 * Kernel thread context (may sleep)
2882 *
2883 * RETURNS:
2884 * 0 on success, -errno otherwise.
2885 */
2886int sata_std_hardreset(struct ata_port *ap, unsigned int *class)
2887{
2888 const unsigned long *timing = sata_ehc_deb_timing(&ap->eh_context);
2889 int rc;
2890
2891 DPRINTK("ENTER\n");
2892
2893 /* do hardreset */
2894 rc = sata_port_hardreset(ap, timing);
2895 if (rc) {
2896 ata_port_printk(ap, KERN_ERR,
2897 "COMRESET failed (errno=%d)\n", rc);
2898 return rc;
2899 }
Tejun Heoc2bd5802006-01-24 17:05:22 +09002900
Tejun Heoc2bd5802006-01-24 17:05:22 +09002901 /* TODO: phy layer with polling, timeouts, etc. */
Tejun Heo81952c52006-05-15 20:57:47 +09002902 if (ata_port_offline(ap)) {
Tejun Heoc2bd5802006-01-24 17:05:22 +09002903 *class = ATA_DEV_NONE;
2904 DPRINTK("EXIT, link offline\n");
2905 return 0;
2906 }
2907
2908 if (ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT)) {
Tejun Heof15a1da2006-05-15 20:57:56 +09002909 ata_port_printk(ap, KERN_ERR,
2910 "COMRESET failed (device not ready)\n");
Tejun Heoc2bd5802006-01-24 17:05:22 +09002911 return -EIO;
2912 }
2913
Tejun Heo3a397462006-02-10 23:58:48 +09002914 ap->ops->dev_select(ap, 0); /* probably unnecessary */
2915
Tejun Heoc2bd5802006-01-24 17:05:22 +09002916 *class = ata_dev_try_classify(ap, 0, NULL);
2917
2918 DPRINTK("EXIT, class=%u\n", *class);
2919 return 0;
2920}
2921
2922/**
2923 * ata_std_postreset - standard postreset callback
2924 * @ap: the target ata_port
2925 * @classes: classes of attached devices
2926 *
2927 * This function is invoked after a successful reset. Note that
2928 * the device might have been reset more than once using
2929 * different reset methods before postreset is invoked.
Tejun Heoc2bd5802006-01-24 17:05:22 +09002930 *
Tejun Heoc2bd5802006-01-24 17:05:22 +09002931 * LOCKING:
2932 * Kernel thread context (may sleep)
2933 */
2934void ata_std_postreset(struct ata_port *ap, unsigned int *classes)
2935{
Tejun Heodc2b3512006-05-15 20:58:00 +09002936 u32 serror;
2937
Tejun Heoc2bd5802006-01-24 17:05:22 +09002938 DPRINTK("ENTER\n");
2939
Tejun Heoc2bd5802006-01-24 17:05:22 +09002940 /* print link status */
Tejun Heo81952c52006-05-15 20:57:47 +09002941 sata_print_link_status(ap);
Tejun Heoc2bd5802006-01-24 17:05:22 +09002942
Tejun Heodc2b3512006-05-15 20:58:00 +09002943 /* clear SError */
2944 if (sata_scr_read(ap, SCR_ERROR, &serror) == 0)
2945 sata_scr_write(ap, SCR_ERROR, serror);
2946
Tejun Heo3a397462006-02-10 23:58:48 +09002947 /* re-enable interrupts */
Tejun Heoe3180492006-05-15 20:58:09 +09002948 if (!ap->ops->error_handler) {
2949 /* FIXME: hack. create a hook instead */
2950 if (ap->ioaddr.ctl_addr)
2951 ata_irq_on(ap);
2952 }
Tejun Heoc2bd5802006-01-24 17:05:22 +09002953
2954 /* is double-select really necessary? */
2955 if (classes[0] != ATA_DEV_NONE)
2956 ap->ops->dev_select(ap, 1);
2957 if (classes[1] != ATA_DEV_NONE)
2958 ap->ops->dev_select(ap, 0);
2959
Tejun Heo3a397462006-02-10 23:58:48 +09002960 /* bail out if no device is present */
2961 if (classes[0] == ATA_DEV_NONE && classes[1] == ATA_DEV_NONE) {
2962 DPRINTK("EXIT, no device\n");
2963 return;
2964 }
2965
2966 /* set up device control */
2967 if (ap->ioaddr.ctl_addr) {
2968 if (ap->flags & ATA_FLAG_MMIO)
2969 writeb(ap->ctl, (void __iomem *) ap->ioaddr.ctl_addr);
2970 else
2971 outb(ap->ctl, ap->ioaddr.ctl_addr);
2972 }
Tejun Heoc2bd5802006-01-24 17:05:22 +09002973
2974 DPRINTK("EXIT\n");
2975}
2976
Tejun Heoa62c0fc2006-01-24 17:05:22 +09002977/**
Tejun Heo623a3122006-03-05 17:55:58 +09002978 * ata_dev_same_device - Determine whether new ID matches configured device
Tejun Heo623a3122006-03-05 17:55:58 +09002979 * @dev: device to compare against
2980 * @new_class: class of the new device
2981 * @new_id: IDENTIFY page of the new device
2982 *
2983 * Compare @new_class and @new_id against @dev and determine
2984 * whether @dev is the device indicated by @new_class and
2985 * @new_id.
2986 *
2987 * LOCKING:
2988 * None.
2989 *
2990 * RETURNS:
2991 * 1 if @dev matches @new_class and @new_id, 0 otherwise.
2992 */
Tejun Heo3373efd2006-05-15 20:57:53 +09002993static int ata_dev_same_device(struct ata_device *dev, unsigned int new_class,
2994 const u16 *new_id)
Tejun Heo623a3122006-03-05 17:55:58 +09002995{
2996 const u16 *old_id = dev->id;
2997 unsigned char model[2][41], serial[2][21];
2998 u64 new_n_sectors;
2999
3000 if (dev->class != new_class) {
Tejun Heof15a1da2006-05-15 20:57:56 +09003001 ata_dev_printk(dev, KERN_INFO, "class mismatch %d != %d\n",
3002 dev->class, new_class);
Tejun Heo623a3122006-03-05 17:55:58 +09003003 return 0;
3004 }
3005
3006 ata_id_c_string(old_id, model[0], ATA_ID_PROD_OFS, sizeof(model[0]));
3007 ata_id_c_string(new_id, model[1], ATA_ID_PROD_OFS, sizeof(model[1]));
3008 ata_id_c_string(old_id, serial[0], ATA_ID_SERNO_OFS, sizeof(serial[0]));
3009 ata_id_c_string(new_id, serial[1], ATA_ID_SERNO_OFS, sizeof(serial[1]));
3010 new_n_sectors = ata_id_n_sectors(new_id);
3011
3012 if (strcmp(model[0], model[1])) {
Tejun Heof15a1da2006-05-15 20:57:56 +09003013 ata_dev_printk(dev, KERN_INFO, "model number mismatch "
3014 "'%s' != '%s'\n", model[0], model[1]);
Tejun Heo623a3122006-03-05 17:55:58 +09003015 return 0;
3016 }
3017
3018 if (strcmp(serial[0], serial[1])) {
Tejun Heof15a1da2006-05-15 20:57:56 +09003019 ata_dev_printk(dev, KERN_INFO, "serial number mismatch "
3020 "'%s' != '%s'\n", serial[0], serial[1]);
Tejun Heo623a3122006-03-05 17:55:58 +09003021 return 0;
3022 }
3023
3024 if (dev->class == ATA_DEV_ATA && dev->n_sectors != new_n_sectors) {
Tejun Heof15a1da2006-05-15 20:57:56 +09003025 ata_dev_printk(dev, KERN_INFO, "n_sectors mismatch "
3026 "%llu != %llu\n",
3027 (unsigned long long)dev->n_sectors,
3028 (unsigned long long)new_n_sectors);
Tejun Heo623a3122006-03-05 17:55:58 +09003029 return 0;
3030 }
3031
3032 return 1;
3033}
3034
3035/**
3036 * ata_dev_revalidate - Revalidate ATA device
Tejun Heo623a3122006-03-05 17:55:58 +09003037 * @dev: device to revalidate
Tejun Heobff04642006-11-10 18:08:10 +09003038 * @readid_flags: read ID flags
Tejun Heo623a3122006-03-05 17:55:58 +09003039 *
3040 * Re-read IDENTIFY page and make sure @dev is still attached to
3041 * the port.
3042 *
3043 * LOCKING:
3044 * Kernel thread context (may sleep)
3045 *
3046 * RETURNS:
3047 * 0 on success, negative errno otherwise
3048 */
Tejun Heobff04642006-11-10 18:08:10 +09003049int ata_dev_revalidate(struct ata_device *dev, unsigned int readid_flags)
Tejun Heo623a3122006-03-05 17:55:58 +09003050{
Tejun Heo5eb45c02006-04-02 18:51:52 +09003051 unsigned int class = dev->class;
Tejun Heof15a1da2006-05-15 20:57:56 +09003052 u16 *id = (void *)dev->ap->sector_buf;
Tejun Heo623a3122006-03-05 17:55:58 +09003053 int rc;
3054
Tejun Heo5eb45c02006-04-02 18:51:52 +09003055 if (!ata_dev_enabled(dev)) {
3056 rc = -ENODEV;
3057 goto fail;
3058 }
Tejun Heo623a3122006-03-05 17:55:58 +09003059
Tejun Heofe635c72006-05-15 20:57:35 +09003060 /* read ID data */
Tejun Heobff04642006-11-10 18:08:10 +09003061 rc = ata_dev_read_id(dev, &class, readid_flags, id);
Tejun Heo623a3122006-03-05 17:55:58 +09003062 if (rc)
3063 goto fail;
3064
3065 /* is the device still there? */
Tejun Heo3373efd2006-05-15 20:57:53 +09003066 if (!ata_dev_same_device(dev, class, id)) {
Tejun Heo623a3122006-03-05 17:55:58 +09003067 rc = -ENODEV;
3068 goto fail;
3069 }
3070
Tejun Heofe635c72006-05-15 20:57:35 +09003071 memcpy(dev->id, id, sizeof(id[0]) * ATA_ID_WORDS);
Tejun Heo623a3122006-03-05 17:55:58 +09003072
3073 /* configure device according to the new ID */
Tejun Heoefdaedc2006-11-01 18:38:52 +09003074 rc = ata_dev_configure(dev);
Tejun Heo5eb45c02006-04-02 18:51:52 +09003075 if (rc == 0)
3076 return 0;
Tejun Heo623a3122006-03-05 17:55:58 +09003077
3078 fail:
Tejun Heof15a1da2006-05-15 20:57:56 +09003079 ata_dev_printk(dev, KERN_ERR, "revalidation failed (errno=%d)\n", rc);
Tejun Heo623a3122006-03-05 17:55:58 +09003080 return rc;
3081}
3082
Alan Cox6919a0a2006-10-27 19:08:46 -07003083struct ata_blacklist_entry {
3084 const char *model_num;
3085 const char *model_rev;
3086 unsigned long horkage;
3087};
3088
3089static const struct ata_blacklist_entry ata_device_blacklist [] = {
3090 /* Devices with DMA related problems under Linux */
3091 { "WDC AC11000H", NULL, ATA_HORKAGE_NODMA },
3092 { "WDC AC22100H", NULL, ATA_HORKAGE_NODMA },
3093 { "WDC AC32500H", NULL, ATA_HORKAGE_NODMA },
3094 { "WDC AC33100H", NULL, ATA_HORKAGE_NODMA },
3095 { "WDC AC31600H", NULL, ATA_HORKAGE_NODMA },
3096 { "WDC AC32100H", "24.09P07", ATA_HORKAGE_NODMA },
3097 { "WDC AC23200L", "21.10N21", ATA_HORKAGE_NODMA },
3098 { "Compaq CRD-8241B", NULL, ATA_HORKAGE_NODMA },
3099 { "CRD-8400B", NULL, ATA_HORKAGE_NODMA },
3100 { "CRD-8480B", NULL, ATA_HORKAGE_NODMA },
3101 { "CRD-8482B", NULL, ATA_HORKAGE_NODMA },
3102 { "CRD-84", NULL, ATA_HORKAGE_NODMA },
3103 { "SanDisk SDP3B", NULL, ATA_HORKAGE_NODMA },
3104 { "SanDisk SDP3B-64", NULL, ATA_HORKAGE_NODMA },
3105 { "SANYO CD-ROM CRD", NULL, ATA_HORKAGE_NODMA },
3106 { "HITACHI CDR-8", NULL, ATA_HORKAGE_NODMA },
3107 { "HITACHI CDR-8335", NULL, ATA_HORKAGE_NODMA },
3108 { "HITACHI CDR-8435", NULL, ATA_HORKAGE_NODMA },
3109 { "Toshiba CD-ROM XM-6202B", NULL, ATA_HORKAGE_NODMA },
3110 { "TOSHIBA CD-ROM XM-1702BC", NULL, ATA_HORKAGE_NODMA },
3111 { "CD-532E-A", NULL, ATA_HORKAGE_NODMA },
3112 { "E-IDE CD-ROM CR-840",NULL, ATA_HORKAGE_NODMA },
3113 { "CD-ROM Drive/F5A", NULL, ATA_HORKAGE_NODMA },
3114 { "WPI CDD-820", NULL, ATA_HORKAGE_NODMA },
3115 { "SAMSUNG CD-ROM SC-148C", NULL, ATA_HORKAGE_NODMA },
3116 { "SAMSUNG CD-ROM SC", NULL, ATA_HORKAGE_NODMA },
3117 { "SanDisk SDP3B-64", NULL, ATA_HORKAGE_NODMA },
3118 { "ATAPI CD-ROM DRIVE 40X MAXIMUM",NULL,ATA_HORKAGE_NODMA },
3119 { "_NEC DV5800A", NULL, ATA_HORKAGE_NODMA },
3120 { "SAMSUNG CD-ROM SN-124","N001", ATA_HORKAGE_NODMA },
3121
3122 /* Devices we expect to fail diagnostics */
3123
3124 /* Devices where NCQ should be avoided */
3125 /* NCQ is slow */
3126 { "WDC WD740ADFD-00", NULL, ATA_HORKAGE_NONCQ },
3127
3128 /* Devices with NCQ limits */
3129
3130 /* End Marker */
3131 { }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003132};
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05003133
Alan Coxf4b15fe2006-03-22 15:54:04 +00003134static int ata_strim(char *s, size_t len)
3135{
3136 len = strnlen(s, len);
3137
3138 /* ATAPI specifies that empty space is blank-filled; remove blanks */
3139 while ((len > 0) && (s[len - 1] == ' ')) {
3140 len--;
3141 s[len] = 0;
3142 }
3143 return len;
3144}
Linus Torvalds1da177e2005-04-16 15:20:36 -07003145
Alan Cox6919a0a2006-10-27 19:08:46 -07003146unsigned long ata_device_blacklisted(const struct ata_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003147{
Alan Coxf4b15fe2006-03-22 15:54:04 +00003148 unsigned char model_num[40];
3149 unsigned char model_rev[16];
3150 unsigned int nlen, rlen;
Alan Cox6919a0a2006-10-27 19:08:46 -07003151 const struct ata_blacklist_entry *ad = ata_device_blacklist;
Albert Lee3a778272006-06-22 13:00:25 +08003152
Alan Coxf4b15fe2006-03-22 15:54:04 +00003153 ata_id_string(dev->id, model_num, ATA_ID_PROD_OFS,
3154 sizeof(model_num));
3155 ata_id_string(dev->id, model_rev, ATA_ID_FW_REV_OFS,
3156 sizeof(model_rev));
3157 nlen = ata_strim(model_num, sizeof(model_num));
3158 rlen = ata_strim(model_rev, sizeof(model_rev));
Linus Torvalds1da177e2005-04-16 15:20:36 -07003159
Alan Cox6919a0a2006-10-27 19:08:46 -07003160 while (ad->model_num) {
3161 if (!strncmp(ad->model_num, model_num, nlen)) {
3162 if (ad->model_rev == NULL)
3163 return ad->horkage;
3164 if (!strncmp(ad->model_rev, model_rev, rlen))
3165 return ad->horkage;
Alan Coxf4b15fe2006-03-22 15:54:04 +00003166 }
Alan Cox6919a0a2006-10-27 19:08:46 -07003167 ad++;
Alan Coxf4b15fe2006-03-22 15:54:04 +00003168 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003169 return 0;
3170}
3171
Alan Cox6919a0a2006-10-27 19:08:46 -07003172static int ata_dma_blacklisted(const struct ata_device *dev)
3173{
3174 /* We don't support polling DMA.
3175 * DMA blacklist those ATAPI devices with CDB-intr (and use PIO)
3176 * if the LLDD handles only interrupts in the HSM_ST_LAST state.
3177 */
3178 if ((dev->ap->flags & ATA_FLAG_PIO_POLLING) &&
3179 (dev->flags & ATA_DFLAG_CDB_INTR))
3180 return 1;
3181 return (ata_device_blacklisted(dev) & ATA_HORKAGE_NODMA) ? 1 : 0;
3182}
3183
Tejun Heoa6d5a512006-03-06 04:31:57 +09003184/**
3185 * ata_dev_xfermask - Compute supported xfermask of the given device
Tejun Heoa6d5a512006-03-06 04:31:57 +09003186 * @dev: Device to compute xfermask for
3187 *
Tejun Heoacf356b2006-03-24 14:07:50 +09003188 * Compute supported xfermask of @dev and store it in
3189 * dev->*_mask. This function is responsible for applying all
3190 * known limits including host controller limits, device
3191 * blacklist, etc...
Tejun Heoa6d5a512006-03-06 04:31:57 +09003192 *
3193 * LOCKING:
3194 * None.
Tejun Heoa6d5a512006-03-06 04:31:57 +09003195 */
Tejun Heo3373efd2006-05-15 20:57:53 +09003196static void ata_dev_xfermask(struct ata_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003197{
Tejun Heo3373efd2006-05-15 20:57:53 +09003198 struct ata_port *ap = dev->ap;
Jeff Garzikcca39742006-08-24 03:19:22 -04003199 struct ata_host *host = ap->host;
Tejun Heoa6d5a512006-03-06 04:31:57 +09003200 unsigned long xfer_mask;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003201
Tejun Heo37deecb2006-08-10 16:59:07 +09003202 /* controller modes available */
Tejun Heo565083e2006-04-02 17:54:47 +09003203 xfer_mask = ata_pack_xfermask(ap->pio_mask,
3204 ap->mwdma_mask, ap->udma_mask);
3205
3206 /* Apply cable rule here. Don't apply it early because when
3207 * we handle hot plug the cable type can itself change.
3208 */
3209 if (ap->cbl == ATA_CBL_PATA40)
3210 xfer_mask &= ~(0xF8 << ATA_SHIFT_UDMA);
Alan Coxfc085152006-10-10 14:28:11 -07003211 /* Apply drive side cable rule. Unknown or 80 pin cables reported
3212 * host side are checked drive side as well. Cases where we know a
3213 * 40wire cable is used safely for 80 are not checked here.
3214 */
3215 if (ata_drive_40wire(dev->id) && (ap->cbl == ATA_CBL_PATA_UNK || ap->cbl == ATA_CBL_PATA80))
3216 xfer_mask &= ~(0xF8 << ATA_SHIFT_UDMA);
3217
Linus Torvalds1da177e2005-04-16 15:20:36 -07003218
Tejun Heo37deecb2006-08-10 16:59:07 +09003219 xfer_mask &= ata_pack_xfermask(dev->pio_mask,
3220 dev->mwdma_mask, dev->udma_mask);
3221 xfer_mask &= ata_id_xfermask(dev->id);
Tejun Heo565083e2006-04-02 17:54:47 +09003222
Alan Coxb352e572006-08-10 18:52:12 +01003223 /*
3224 * CFA Advanced TrueIDE timings are not allowed on a shared
3225 * cable
3226 */
3227 if (ata_dev_pair(dev)) {
3228 /* No PIO5 or PIO6 */
3229 xfer_mask &= ~(0x03 << (ATA_SHIFT_PIO + 5));
3230 /* No MWDMA3 or MWDMA 4 */
3231 xfer_mask &= ~(0x03 << (ATA_SHIFT_MWDMA + 3));
3232 }
3233
Tejun Heo37deecb2006-08-10 16:59:07 +09003234 if (ata_dma_blacklisted(dev)) {
3235 xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA);
Tejun Heof15a1da2006-05-15 20:57:56 +09003236 ata_dev_printk(dev, KERN_WARNING,
3237 "device is on DMA blacklist, disabling DMA\n");
Tejun Heo37deecb2006-08-10 16:59:07 +09003238 }
Tejun Heoa6d5a512006-03-06 04:31:57 +09003239
Jeff Garzikcca39742006-08-24 03:19:22 -04003240 if ((host->flags & ATA_HOST_SIMPLEX) && host->simplex_claimed) {
Tejun Heo37deecb2006-08-10 16:59:07 +09003241 xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA);
3242 ata_dev_printk(dev, KERN_WARNING, "simplex DMA is claimed by "
3243 "other device, disabling DMA\n");
Alan Cox5444a6f2006-03-27 18:58:20 +01003244 }
Tejun Heo565083e2006-04-02 17:54:47 +09003245
Alan Cox5444a6f2006-03-27 18:58:20 +01003246 if (ap->ops->mode_filter)
3247 xfer_mask = ap->ops->mode_filter(ap, dev, xfer_mask);
3248
Tejun Heo565083e2006-04-02 17:54:47 +09003249 ata_unpack_xfermask(xfer_mask, &dev->pio_mask,
3250 &dev->mwdma_mask, &dev->udma_mask);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003251}
3252
Linus Torvalds1da177e2005-04-16 15:20:36 -07003253/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07003254 * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command
Linus Torvalds1da177e2005-04-16 15:20:36 -07003255 * @dev: Device to which command will be sent
3256 *
Jeff Garzik780a87f2005-05-30 15:41:05 -04003257 * Issue SET FEATURES - XFER MODE command to device @dev
3258 * on port @ap.
3259 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07003260 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04003261 * PCI/etc. bus probe sem.
Tejun Heo83206a22006-03-24 15:25:31 +09003262 *
3263 * RETURNS:
3264 * 0 on success, AC_ERR_* mask otherwise.
Linus Torvalds1da177e2005-04-16 15:20:36 -07003265 */
3266
Tejun Heo3373efd2006-05-15 20:57:53 +09003267static unsigned int ata_dev_set_xfermode(struct ata_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003268{
Tejun Heoa0123702005-12-13 14:49:31 +09003269 struct ata_taskfile tf;
Tejun Heo83206a22006-03-24 15:25:31 +09003270 unsigned int err_mask;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003271
3272 /* set up set-features taskfile */
3273 DPRINTK("set features - xfer mode\n");
3274
Tejun Heo3373efd2006-05-15 20:57:53 +09003275 ata_tf_init(dev, &tf);
Tejun Heoa0123702005-12-13 14:49:31 +09003276 tf.command = ATA_CMD_SET_FEATURES;
3277 tf.feature = SETFEATURES_XFER;
3278 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
3279 tf.protocol = ATA_PROT_NODATA;
3280 tf.nsect = dev->xfer_mode;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003281
Tejun Heo3373efd2006-05-15 20:57:53 +09003282 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003283
Tejun Heo83206a22006-03-24 15:25:31 +09003284 DPRINTK("EXIT, err_mask=%x\n", err_mask);
3285 return err_mask;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003286}
3287
3288/**
Albert Lee8bf62ece2005-05-12 15:29:42 -04003289 * ata_dev_init_params - Issue INIT DEV PARAMS command
Albert Lee8bf62ece2005-05-12 15:29:42 -04003290 * @dev: Device to which command will be sent
Randy Dunlape2a7f772006-05-18 10:50:18 -07003291 * @heads: Number of heads (taskfile parameter)
3292 * @sectors: Number of sectors (taskfile parameter)
Albert Lee8bf62ece2005-05-12 15:29:42 -04003293 *
3294 * LOCKING:
Tejun Heo6aff8f12006-02-15 18:24:09 +09003295 * Kernel thread context (may sleep)
3296 *
3297 * RETURNS:
3298 * 0 on success, AC_ERR_* mask otherwise.
Albert Lee8bf62ece2005-05-12 15:29:42 -04003299 */
Tejun Heo3373efd2006-05-15 20:57:53 +09003300static unsigned int ata_dev_init_params(struct ata_device *dev,
3301 u16 heads, u16 sectors)
Albert Lee8bf62ece2005-05-12 15:29:42 -04003302{
Tejun Heoa0123702005-12-13 14:49:31 +09003303 struct ata_taskfile tf;
Tejun Heo6aff8f12006-02-15 18:24:09 +09003304 unsigned int err_mask;
Albert Lee8bf62ece2005-05-12 15:29:42 -04003305
3306 /* Number of sectors per track 1-255. Number of heads 1-16 */
3307 if (sectors < 1 || sectors > 255 || heads < 1 || heads > 16)
Albert Lee00b6f5e2006-03-27 16:39:18 +08003308 return AC_ERR_INVALID;
Albert Lee8bf62ece2005-05-12 15:29:42 -04003309
3310 /* set up init dev params taskfile */
3311 DPRINTK("init dev params \n");
3312
Tejun Heo3373efd2006-05-15 20:57:53 +09003313 ata_tf_init(dev, &tf);
Tejun Heoa0123702005-12-13 14:49:31 +09003314 tf.command = ATA_CMD_INIT_DEV_PARAMS;
3315 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
3316 tf.protocol = ATA_PROT_NODATA;
3317 tf.nsect = sectors;
3318 tf.device |= (heads - 1) & 0x0f; /* max head = num. of heads - 1 */
Albert Lee8bf62ece2005-05-12 15:29:42 -04003319
Tejun Heo3373efd2006-05-15 20:57:53 +09003320 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0);
Albert Lee8bf62ece2005-05-12 15:29:42 -04003321
Tejun Heo6aff8f12006-02-15 18:24:09 +09003322 DPRINTK("EXIT, err_mask=%x\n", err_mask);
3323 return err_mask;
Albert Lee8bf62ece2005-05-12 15:29:42 -04003324}
3325
3326/**
Jeff Garzik0cba6322005-05-30 19:49:12 -04003327 * ata_sg_clean - Unmap DMA memory associated with command
3328 * @qc: Command containing DMA memory to be released
3329 *
3330 * Unmap all mapped DMA memory associated with this command.
Linus Torvalds1da177e2005-04-16 15:20:36 -07003331 *
3332 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04003333 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003334 */
3335
3336static void ata_sg_clean(struct ata_queued_cmd *qc)
3337{
3338 struct ata_port *ap = qc->ap;
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003339 struct scatterlist *sg = qc->__sg;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003340 int dir = qc->dma_dir;
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003341 void *pad_buf = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003342
Tejun Heoa46314742006-02-11 19:11:13 +09003343 WARN_ON(!(qc->flags & ATA_QCFLAG_DMAMAP));
3344 WARN_ON(sg == NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003345
3346 if (qc->flags & ATA_QCFLAG_SINGLE)
Jeff Garzikf1318832006-02-20 16:55:56 -05003347 WARN_ON(qc->n_elem > 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003348
Jeff Garzik2c13b7c2005-11-14 14:14:16 -05003349 VPRINTK("unmapping %u sg elements\n", qc->n_elem);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003350
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003351 /* if we padded the buffer out to 32-bit bound, and data
3352 * xfer direction is from-device, we must copy from the
3353 * pad buffer back into the supplied buffer
3354 */
3355 if (qc->pad_len && !(qc->tf.flags & ATA_TFLAG_WRITE))
3356 pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ);
3357
3358 if (qc->flags & ATA_QCFLAG_SG) {
Jeff Garzike1410f22005-11-14 14:06:26 -05003359 if (qc->n_elem)
Brian King2f1f6102006-03-23 17:30:15 -06003360 dma_unmap_sg(ap->dev, sg, qc->n_elem, dir);
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003361 /* restore last sg */
3362 sg[qc->orig_n_elem - 1].length += qc->pad_len;
3363 if (pad_buf) {
3364 struct scatterlist *psg = &qc->pad_sgent;
3365 void *addr = kmap_atomic(psg->page, KM_IRQ0);
3366 memcpy(addr + psg->offset, pad_buf, qc->pad_len);
Mark Lorddfa15982005-12-12 23:19:28 -05003367 kunmap_atomic(addr, KM_IRQ0);
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003368 }
3369 } else {
Tejun Heo2e242fa2006-02-20 23:48:38 +09003370 if (qc->n_elem)
Brian King2f1f6102006-03-23 17:30:15 -06003371 dma_unmap_single(ap->dev,
Jeff Garzike1410f22005-11-14 14:06:26 -05003372 sg_dma_address(&sg[0]), sg_dma_len(&sg[0]),
3373 dir);
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003374 /* restore sg */
3375 sg->length += qc->pad_len;
3376 if (pad_buf)
3377 memcpy(qc->buf_virt + sg->length - qc->pad_len,
3378 pad_buf, qc->pad_len);
3379 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003380
3381 qc->flags &= ~ATA_QCFLAG_DMAMAP;
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003382 qc->__sg = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003383}
3384
3385/**
3386 * ata_fill_sg - Fill PCI IDE PRD table
3387 * @qc: Metadata associated with taskfile to be transferred
3388 *
Jeff Garzik780a87f2005-05-30 15:41:05 -04003389 * Fill PCI IDE PRD (scatter-gather) table with segments
3390 * associated with the current disk command.
3391 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07003392 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04003393 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003394 *
3395 */
3396static void ata_fill_sg(struct ata_queued_cmd *qc)
3397{
Linus Torvalds1da177e2005-04-16 15:20:36 -07003398 struct ata_port *ap = qc->ap;
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003399 struct scatterlist *sg;
3400 unsigned int idx;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003401
Tejun Heoa46314742006-02-11 19:11:13 +09003402 WARN_ON(qc->__sg == NULL);
Jeff Garzikf1318832006-02-20 16:55:56 -05003403 WARN_ON(qc->n_elem == 0 && qc->pad_len == 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003404
3405 idx = 0;
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003406 ata_for_each_sg(sg, qc) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003407 u32 addr, offset;
3408 u32 sg_len, len;
3409
3410 /* determine if physical DMA addr spans 64K boundary.
3411 * Note h/w doesn't support 64-bit, so we unconditionally
3412 * truncate dma_addr_t to u32.
3413 */
3414 addr = (u32) sg_dma_address(sg);
3415 sg_len = sg_dma_len(sg);
3416
3417 while (sg_len) {
3418 offset = addr & 0xffff;
3419 len = sg_len;
3420 if ((offset + sg_len) > 0x10000)
3421 len = 0x10000 - offset;
3422
3423 ap->prd[idx].addr = cpu_to_le32(addr);
3424 ap->prd[idx].flags_len = cpu_to_le32(len & 0xffff);
3425 VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", idx, addr, len);
3426
3427 idx++;
3428 sg_len -= len;
3429 addr += len;
3430 }
3431 }
3432
3433 if (idx)
3434 ap->prd[idx - 1].flags_len |= cpu_to_le32(ATA_PRD_EOT);
3435}
3436/**
3437 * ata_check_atapi_dma - Check whether ATAPI DMA can be supported
3438 * @qc: Metadata associated with taskfile to check
3439 *
Jeff Garzik780a87f2005-05-30 15:41:05 -04003440 * Allow low-level driver to filter ATA PACKET commands, returning
3441 * a status indicating whether or not it is OK to use DMA for the
3442 * supplied PACKET command.
3443 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07003444 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04003445 * spin_lock_irqsave(host lock)
Jeff Garzik0cba6322005-05-30 19:49:12 -04003446 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07003447 * RETURNS: 0 when ATAPI DMA can be used
3448 * nonzero otherwise
3449 */
3450int ata_check_atapi_dma(struct ata_queued_cmd *qc)
3451{
3452 struct ata_port *ap = qc->ap;
3453 int rc = 0; /* Assume ATAPI DMA is OK by default */
3454
3455 if (ap->ops->check_atapi_dma)
3456 rc = ap->ops->check_atapi_dma(qc);
3457
3458 return rc;
3459}
3460/**
3461 * ata_qc_prep - Prepare taskfile for submission
3462 * @qc: Metadata associated with taskfile to be prepared
3463 *
Jeff Garzik780a87f2005-05-30 15:41:05 -04003464 * Prepare ATA taskfile for submission.
3465 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07003466 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04003467 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003468 */
3469void ata_qc_prep(struct ata_queued_cmd *qc)
3470{
3471 if (!(qc->flags & ATA_QCFLAG_DMAMAP))
3472 return;
3473
3474 ata_fill_sg(qc);
3475}
3476
Brian Kinge46834c2006-03-17 17:04:03 -06003477void ata_noop_qc_prep(struct ata_queued_cmd *qc) { }
3478
Jeff Garzik0cba6322005-05-30 19:49:12 -04003479/**
3480 * ata_sg_init_one - Associate command with memory buffer
3481 * @qc: Command to be associated
3482 * @buf: Memory buffer
3483 * @buflen: Length of memory buffer, in bytes.
3484 *
3485 * Initialize the data-related elements of queued_cmd @qc
3486 * to point to a single memory buffer, @buf of byte length @buflen.
3487 *
3488 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04003489 * spin_lock_irqsave(host lock)
Jeff Garzik0cba6322005-05-30 19:49:12 -04003490 */
3491
Linus Torvalds1da177e2005-04-16 15:20:36 -07003492void ata_sg_init_one(struct ata_queued_cmd *qc, void *buf, unsigned int buflen)
3493{
3494 struct scatterlist *sg;
3495
3496 qc->flags |= ATA_QCFLAG_SINGLE;
3497
3498 memset(&qc->sgent, 0, sizeof(qc->sgent));
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003499 qc->__sg = &qc->sgent;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003500 qc->n_elem = 1;
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003501 qc->orig_n_elem = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003502 qc->buf_virt = buf;
Brian King233277c2006-06-07 11:25:31 -05003503 qc->nbytes = buflen;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003504
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003505 sg = qc->__sg;
Jeff Garzikf0612bb2005-10-30 01:58:18 -05003506 sg_init_one(sg, buf, buflen);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003507}
3508
Jeff Garzik0cba6322005-05-30 19:49:12 -04003509/**
3510 * ata_sg_init - Associate command with scatter-gather table.
3511 * @qc: Command to be associated
3512 * @sg: Scatter-gather table.
3513 * @n_elem: Number of elements in s/g table.
3514 *
3515 * Initialize the data-related elements of queued_cmd @qc
3516 * to point to a scatter-gather table @sg, containing @n_elem
3517 * elements.
3518 *
3519 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04003520 * spin_lock_irqsave(host lock)
Jeff Garzik0cba6322005-05-30 19:49:12 -04003521 */
3522
Linus Torvalds1da177e2005-04-16 15:20:36 -07003523void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
3524 unsigned int n_elem)
3525{
3526 qc->flags |= ATA_QCFLAG_SG;
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003527 qc->__sg = sg;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003528 qc->n_elem = n_elem;
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003529 qc->orig_n_elem = n_elem;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003530}
3531
3532/**
Jeff Garzik0cba6322005-05-30 19:49:12 -04003533 * ata_sg_setup_one - DMA-map the memory buffer associated with a command.
3534 * @qc: Command with memory buffer to be mapped.
3535 *
3536 * DMA-map the memory buffer associated with queued_cmd @qc.
Linus Torvalds1da177e2005-04-16 15:20:36 -07003537 *
3538 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04003539 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003540 *
3541 * RETURNS:
Jeff Garzik0cba6322005-05-30 19:49:12 -04003542 * Zero on success, negative on error.
Linus Torvalds1da177e2005-04-16 15:20:36 -07003543 */
3544
3545static int ata_sg_setup_one(struct ata_queued_cmd *qc)
3546{
3547 struct ata_port *ap = qc->ap;
3548 int dir = qc->dma_dir;
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003549 struct scatterlist *sg = qc->__sg;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003550 dma_addr_t dma_address;
Tejun Heo2e242fa2006-02-20 23:48:38 +09003551 int trim_sg = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003552
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003553 /* we must lengthen transfers to end on a 32-bit boundary */
3554 qc->pad_len = sg->length & 3;
3555 if (qc->pad_len) {
3556 void *pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ);
3557 struct scatterlist *psg = &qc->pad_sgent;
3558
Tejun Heoa46314742006-02-11 19:11:13 +09003559 WARN_ON(qc->dev->class != ATA_DEV_ATAPI);
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003560
3561 memset(pad_buf, 0, ATA_DMA_PAD_SZ);
3562
3563 if (qc->tf.flags & ATA_TFLAG_WRITE)
3564 memcpy(pad_buf, qc->buf_virt + sg->length - qc->pad_len,
3565 qc->pad_len);
3566
3567 sg_dma_address(psg) = ap->pad_dma + (qc->tag * ATA_DMA_PAD_SZ);
3568 sg_dma_len(psg) = ATA_DMA_PAD_SZ;
3569 /* trim sg */
3570 sg->length -= qc->pad_len;
Tejun Heo2e242fa2006-02-20 23:48:38 +09003571 if (sg->length == 0)
3572 trim_sg = 1;
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003573
3574 DPRINTK("padding done, sg->length=%u pad_len=%u\n",
3575 sg->length, qc->pad_len);
3576 }
3577
Tejun Heo2e242fa2006-02-20 23:48:38 +09003578 if (trim_sg) {
3579 qc->n_elem--;
Jeff Garzike1410f22005-11-14 14:06:26 -05003580 goto skip_map;
3581 }
3582
Brian King2f1f6102006-03-23 17:30:15 -06003583 dma_address = dma_map_single(ap->dev, qc->buf_virt,
Albert Lee32529e02005-05-26 03:49:42 -04003584 sg->length, dir);
Tejun Heo537a95d2005-11-05 14:29:01 -05003585 if (dma_mapping_error(dma_address)) {
3586 /* restore sg */
3587 sg->length += qc->pad_len;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003588 return -1;
Tejun Heo537a95d2005-11-05 14:29:01 -05003589 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003590
3591 sg_dma_address(sg) = dma_address;
Albert Lee32529e02005-05-26 03:49:42 -04003592 sg_dma_len(sg) = sg->length;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003593
Tejun Heo2e242fa2006-02-20 23:48:38 +09003594skip_map:
Linus Torvalds1da177e2005-04-16 15:20:36 -07003595 DPRINTK("mapped buffer of %d bytes for %s\n", sg_dma_len(sg),
3596 qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read");
3597
3598 return 0;
3599}
3600
3601/**
Jeff Garzik0cba6322005-05-30 19:49:12 -04003602 * ata_sg_setup - DMA-map the scatter-gather table associated with a command.
3603 * @qc: Command with scatter-gather table to be mapped.
3604 *
3605 * DMA-map the scatter-gather table associated with queued_cmd @qc.
Linus Torvalds1da177e2005-04-16 15:20:36 -07003606 *
3607 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04003608 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003609 *
3610 * RETURNS:
Jeff Garzik0cba6322005-05-30 19:49:12 -04003611 * Zero on success, negative on error.
Linus Torvalds1da177e2005-04-16 15:20:36 -07003612 *
3613 */
3614
3615static int ata_sg_setup(struct ata_queued_cmd *qc)
3616{
3617 struct ata_port *ap = qc->ap;
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003618 struct scatterlist *sg = qc->__sg;
3619 struct scatterlist *lsg = &sg[qc->n_elem - 1];
Jeff Garzike1410f22005-11-14 14:06:26 -05003620 int n_elem, pre_n_elem, dir, trim_sg = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003621
3622 VPRINTK("ENTER, ata%u\n", ap->id);
Tejun Heoa46314742006-02-11 19:11:13 +09003623 WARN_ON(!(qc->flags & ATA_QCFLAG_SG));
Linus Torvalds1da177e2005-04-16 15:20:36 -07003624
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003625 /* we must lengthen transfers to end on a 32-bit boundary */
3626 qc->pad_len = lsg->length & 3;
3627 if (qc->pad_len) {
3628 void *pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ);
3629 struct scatterlist *psg = &qc->pad_sgent;
3630 unsigned int offset;
3631
Tejun Heoa46314742006-02-11 19:11:13 +09003632 WARN_ON(qc->dev->class != ATA_DEV_ATAPI);
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003633
3634 memset(pad_buf, 0, ATA_DMA_PAD_SZ);
3635
3636 /*
3637 * psg->page/offset are used to copy to-be-written
3638 * data in this function or read data in ata_sg_clean.
3639 */
3640 offset = lsg->offset + lsg->length - qc->pad_len;
3641 psg->page = nth_page(lsg->page, offset >> PAGE_SHIFT);
3642 psg->offset = offset_in_page(offset);
3643
3644 if (qc->tf.flags & ATA_TFLAG_WRITE) {
3645 void *addr = kmap_atomic(psg->page, KM_IRQ0);
3646 memcpy(pad_buf, addr + psg->offset, qc->pad_len);
Mark Lorddfa15982005-12-12 23:19:28 -05003647 kunmap_atomic(addr, KM_IRQ0);
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003648 }
3649
3650 sg_dma_address(psg) = ap->pad_dma + (qc->tag * ATA_DMA_PAD_SZ);
3651 sg_dma_len(psg) = ATA_DMA_PAD_SZ;
3652 /* trim last sg */
3653 lsg->length -= qc->pad_len;
Jeff Garzike1410f22005-11-14 14:06:26 -05003654 if (lsg->length == 0)
3655 trim_sg = 1;
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003656
3657 DPRINTK("padding done, sg[%d].length=%u pad_len=%u\n",
3658 qc->n_elem - 1, lsg->length, qc->pad_len);
3659 }
3660
Jeff Garzike1410f22005-11-14 14:06:26 -05003661 pre_n_elem = qc->n_elem;
3662 if (trim_sg && pre_n_elem)
3663 pre_n_elem--;
3664
3665 if (!pre_n_elem) {
3666 n_elem = 0;
3667 goto skip_map;
3668 }
3669
Linus Torvalds1da177e2005-04-16 15:20:36 -07003670 dir = qc->dma_dir;
Brian King2f1f6102006-03-23 17:30:15 -06003671 n_elem = dma_map_sg(ap->dev, sg, pre_n_elem, dir);
Tejun Heo537a95d2005-11-05 14:29:01 -05003672 if (n_elem < 1) {
3673 /* restore last sg */
3674 lsg->length += qc->pad_len;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003675 return -1;
Tejun Heo537a95d2005-11-05 14:29:01 -05003676 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003677
3678 DPRINTK("%d sg elements mapped\n", n_elem);
3679
Jeff Garzike1410f22005-11-14 14:06:26 -05003680skip_map:
Linus Torvalds1da177e2005-04-16 15:20:36 -07003681 qc->n_elem = n_elem;
3682
3683 return 0;
3684}
3685
3686/**
Randy Dunlapc893a3a2006-01-28 13:15:32 -05003687 * swap_buf_le16 - swap halves of 16-bit words in place
Edward Falk0baab862005-06-02 18:17:13 -04003688 * @buf: Buffer to swap
3689 * @buf_words: Number of 16-bit words in buffer.
3690 *
3691 * Swap halves of 16-bit words if needed to convert from
3692 * little-endian byte order to native cpu byte order, or
3693 * vice-versa.
3694 *
3695 * LOCKING:
Randy Dunlap6f0ef4f2005-10-25 01:44:30 -04003696 * Inherited from caller.
Edward Falk0baab862005-06-02 18:17:13 -04003697 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003698void swap_buf_le16(u16 *buf, unsigned int buf_words)
3699{
3700#ifdef __BIG_ENDIAN
3701 unsigned int i;
3702
3703 for (i = 0; i < buf_words; i++)
3704 buf[i] = le16_to_cpu(buf[i]);
3705#endif /* __BIG_ENDIAN */
3706}
3707
Albert Lee6ae4cfb2005-08-12 14:15:34 +08003708/**
3709 * ata_mmio_data_xfer - Transfer data by MMIO
Jeff Garzikbf717b112006-06-13 20:27:03 -04003710 * @adev: device for this I/O
Albert Lee6ae4cfb2005-08-12 14:15:34 +08003711 * @buf: data buffer
3712 * @buflen: buffer length
Jeff Garzik344baba2005-09-07 01:15:17 -04003713 * @write_data: read/write
Albert Lee6ae4cfb2005-08-12 14:15:34 +08003714 *
3715 * Transfer data from/to the device data register by MMIO.
3716 *
3717 * LOCKING:
3718 * Inherited from caller.
Albert Lee6ae4cfb2005-08-12 14:15:34 +08003719 */
3720
Tejun Heo88574552006-06-25 20:00:35 +09003721void ata_mmio_data_xfer(struct ata_device *adev, unsigned char *buf,
Alan Coxa6b2c5d2006-05-22 16:59:59 +01003722 unsigned int buflen, int write_data)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003723{
Alan Coxa6b2c5d2006-05-22 16:59:59 +01003724 struct ata_port *ap = adev->ap;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003725 unsigned int i;
3726 unsigned int words = buflen >> 1;
3727 u16 *buf16 = (u16 *) buf;
3728 void __iomem *mmio = (void __iomem *)ap->ioaddr.data_addr;
3729
Albert Lee6ae4cfb2005-08-12 14:15:34 +08003730 /* Transfer multiple of 2 bytes */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003731 if (write_data) {
3732 for (i = 0; i < words; i++)
3733 writew(le16_to_cpu(buf16[i]), mmio);
3734 } else {
3735 for (i = 0; i < words; i++)
3736 buf16[i] = cpu_to_le16(readw(mmio));
3737 }
Albert Lee6ae4cfb2005-08-12 14:15:34 +08003738
3739 /* Transfer trailing 1 byte, if any. */
3740 if (unlikely(buflen & 0x01)) {
3741 u16 align_buf[1] = { 0 };
3742 unsigned char *trailing_buf = buf + buflen - 1;
3743
3744 if (write_data) {
3745 memcpy(align_buf, trailing_buf, 1);
3746 writew(le16_to_cpu(align_buf[0]), mmio);
3747 } else {
3748 align_buf[0] = cpu_to_le16(readw(mmio));
3749 memcpy(trailing_buf, align_buf, 1);
3750 }
3751 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003752}
3753
Albert Lee6ae4cfb2005-08-12 14:15:34 +08003754/**
3755 * ata_pio_data_xfer - Transfer data by PIO
Alan Coxa6b2c5d2006-05-22 16:59:59 +01003756 * @adev: device to target
Albert Lee6ae4cfb2005-08-12 14:15:34 +08003757 * @buf: data buffer
3758 * @buflen: buffer length
Jeff Garzik344baba2005-09-07 01:15:17 -04003759 * @write_data: read/write
Albert Lee6ae4cfb2005-08-12 14:15:34 +08003760 *
3761 * Transfer data from/to the device data register by PIO.
3762 *
3763 * LOCKING:
3764 * Inherited from caller.
Albert Lee6ae4cfb2005-08-12 14:15:34 +08003765 */
3766
Tejun Heo88574552006-06-25 20:00:35 +09003767void ata_pio_data_xfer(struct ata_device *adev, unsigned char *buf,
Alan Coxa6b2c5d2006-05-22 16:59:59 +01003768 unsigned int buflen, int write_data)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003769{
Alan Coxa6b2c5d2006-05-22 16:59:59 +01003770 struct ata_port *ap = adev->ap;
Albert Lee6ae4cfb2005-08-12 14:15:34 +08003771 unsigned int words = buflen >> 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003772
Albert Lee6ae4cfb2005-08-12 14:15:34 +08003773 /* Transfer multiple of 2 bytes */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003774 if (write_data)
Albert Lee6ae4cfb2005-08-12 14:15:34 +08003775 outsw(ap->ioaddr.data_addr, buf, words);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003776 else
Albert Lee6ae4cfb2005-08-12 14:15:34 +08003777 insw(ap->ioaddr.data_addr, buf, words);
3778
3779 /* Transfer trailing 1 byte, if any. */
3780 if (unlikely(buflen & 0x01)) {
3781 u16 align_buf[1] = { 0 };
3782 unsigned char *trailing_buf = buf + buflen - 1;
3783
3784 if (write_data) {
3785 memcpy(align_buf, trailing_buf, 1);
3786 outw(le16_to_cpu(align_buf[0]), ap->ioaddr.data_addr);
3787 } else {
3788 align_buf[0] = cpu_to_le16(inw(ap->ioaddr.data_addr));
3789 memcpy(trailing_buf, align_buf, 1);
3790 }
3791 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003792}
3793
Albert Lee6ae4cfb2005-08-12 14:15:34 +08003794/**
Alan Cox75e99582006-05-24 14:14:41 +01003795 * ata_pio_data_xfer_noirq - Transfer data by PIO
3796 * @adev: device to target
3797 * @buf: data buffer
3798 * @buflen: buffer length
3799 * @write_data: read/write
3800 *
Tejun Heo88574552006-06-25 20:00:35 +09003801 * Transfer data from/to the device data register by PIO. Do the
Alan Cox75e99582006-05-24 14:14:41 +01003802 * transfer with interrupts disabled.
3803 *
3804 * LOCKING:
3805 * Inherited from caller.
3806 */
3807
3808void ata_pio_data_xfer_noirq(struct ata_device *adev, unsigned char *buf,
3809 unsigned int buflen, int write_data)
3810{
3811 unsigned long flags;
3812 local_irq_save(flags);
3813 ata_pio_data_xfer(adev, buf, buflen, write_data);
3814 local_irq_restore(flags);
3815}
3816
3817
3818/**
Albert Lee6ae4cfb2005-08-12 14:15:34 +08003819 * ata_pio_sector - Transfer ATA_SECT_SIZE (512 bytes) of data.
3820 * @qc: Command on going
3821 *
3822 * Transfer ATA_SECT_SIZE of data from/to the ATA device.
3823 *
3824 * LOCKING:
3825 * Inherited from caller.
3826 */
3827
Linus Torvalds1da177e2005-04-16 15:20:36 -07003828static void ata_pio_sector(struct ata_queued_cmd *qc)
3829{
3830 int do_write = (qc->tf.flags & ATA_TFLAG_WRITE);
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003831 struct scatterlist *sg = qc->__sg;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003832 struct ata_port *ap = qc->ap;
3833 struct page *page;
3834 unsigned int offset;
3835 unsigned char *buf;
3836
3837 if (qc->cursect == (qc->nsect - 1))
Albert Lee14be71f2005-09-27 17:36:35 +08003838 ap->hsm_task_state = HSM_ST_LAST;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003839
3840 page = sg[qc->cursg].page;
3841 offset = sg[qc->cursg].offset + qc->cursg_ofs * ATA_SECT_SIZE;
3842
3843 /* get the current page and offset */
3844 page = nth_page(page, (offset >> PAGE_SHIFT));
3845 offset %= PAGE_SIZE;
3846
Albert Lee7282aa42005-10-09 09:46:07 -04003847 DPRINTK("data %s\n", qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read");
3848
Albert Lee91b8b312005-10-09 09:48:44 -04003849 if (PageHighMem(page)) {
3850 unsigned long flags;
Albert Lee7282aa42005-10-09 09:46:07 -04003851
Alan Coxa6b2c5d2006-05-22 16:59:59 +01003852 /* FIXME: use a bounce buffer */
Albert Lee91b8b312005-10-09 09:48:44 -04003853 local_irq_save(flags);
3854 buf = kmap_atomic(page, KM_IRQ0);
Albert Lee083958d2005-10-09 09:47:31 -04003855
Albert Lee91b8b312005-10-09 09:48:44 -04003856 /* do the actual data transfer */
Alan Coxa6b2c5d2006-05-22 16:59:59 +01003857 ap->ops->data_xfer(qc->dev, buf + offset, ATA_SECT_SIZE, do_write);
Albert Lee91b8b312005-10-09 09:48:44 -04003858
3859 kunmap_atomic(buf, KM_IRQ0);
3860 local_irq_restore(flags);
3861 } else {
3862 buf = page_address(page);
Alan Coxa6b2c5d2006-05-22 16:59:59 +01003863 ap->ops->data_xfer(qc->dev, buf + offset, ATA_SECT_SIZE, do_write);
Albert Lee91b8b312005-10-09 09:48:44 -04003864 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003865
3866 qc->cursect++;
3867 qc->cursg_ofs++;
3868
Albert Lee32529e02005-05-26 03:49:42 -04003869 if ((qc->cursg_ofs * ATA_SECT_SIZE) == (&sg[qc->cursg])->length) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003870 qc->cursg++;
3871 qc->cursg_ofs = 0;
3872 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003873}
Linus Torvalds1da177e2005-04-16 15:20:36 -07003874
Albert Lee6ae4cfb2005-08-12 14:15:34 +08003875/**
Albert Lee07f6f7d2005-11-01 19:33:20 +08003876 * ata_pio_sectors - Transfer one or many 512-byte sectors.
3877 * @qc: Command on going
3878 *
Jeff Garzikc81e29b2006-05-24 01:49:12 -04003879 * Transfer one or many ATA_SECT_SIZE of data from/to the
Albert Lee07f6f7d2005-11-01 19:33:20 +08003880 * ATA device for the DRQ request.
3881 *
3882 * LOCKING:
3883 * Inherited from caller.
3884 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003885
Albert Lee07f6f7d2005-11-01 19:33:20 +08003886static void ata_pio_sectors(struct ata_queued_cmd *qc)
3887{
3888 if (is_multi_taskfile(&qc->tf)) {
3889 /* READ/WRITE MULTIPLE */
3890 unsigned int nsect;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003891
Jeff Garzik587005d2006-02-11 18:17:32 -05003892 WARN_ON(qc->dev->multi_count == 0);
Albert Lee07f6f7d2005-11-01 19:33:20 +08003893
3894 nsect = min(qc->nsect - qc->cursect, qc->dev->multi_count);
3895 while (nsect--)
3896 ata_pio_sector(qc);
3897 } else
3898 ata_pio_sector(qc);
3899}
3900
3901/**
Albert Leec71c1852005-10-04 06:03:45 -04003902 * atapi_send_cdb - Write CDB bytes to hardware
3903 * @ap: Port to which ATAPI device is attached.
3904 * @qc: Taskfile currently active
3905 *
3906 * When device has indicated its readiness to accept
3907 * a CDB, this function is called. Send the CDB.
3908 *
3909 * LOCKING:
3910 * caller.
3911 */
3912
3913static void atapi_send_cdb(struct ata_port *ap, struct ata_queued_cmd *qc)
3914{
3915 /* send SCSI cdb */
3916 DPRINTK("send cdb\n");
Jeff Garzikdb024d52006-02-13 00:23:57 -05003917 WARN_ON(qc->dev->cdb_len < 12);
Albert Leec71c1852005-10-04 06:03:45 -04003918
Alan Coxa6b2c5d2006-05-22 16:59:59 +01003919 ap->ops->data_xfer(qc->dev, qc->cdb, qc->dev->cdb_len, 1);
Albert Leec71c1852005-10-04 06:03:45 -04003920 ata_altstatus(ap); /* flush */
3921
3922 switch (qc->tf.protocol) {
3923 case ATA_PROT_ATAPI:
3924 ap->hsm_task_state = HSM_ST;
3925 break;
3926 case ATA_PROT_ATAPI_NODATA:
3927 ap->hsm_task_state = HSM_ST_LAST;
3928 break;
3929 case ATA_PROT_ATAPI_DMA:
3930 ap->hsm_task_state = HSM_ST_LAST;
3931 /* initiate bmdma */
3932 ap->ops->bmdma_start(qc);
3933 break;
3934 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003935}
3936
Albert Lee6ae4cfb2005-08-12 14:15:34 +08003937/**
3938 * __atapi_pio_bytes - Transfer data from/to the ATAPI device.
3939 * @qc: Command on going
3940 * @bytes: number of bytes
3941 *
3942 * Transfer Transfer data from/to the ATAPI device.
3943 *
3944 * LOCKING:
3945 * Inherited from caller.
3946 *
3947 */
3948
Linus Torvalds1da177e2005-04-16 15:20:36 -07003949static void __atapi_pio_bytes(struct ata_queued_cmd *qc, unsigned int bytes)
3950{
3951 int do_write = (qc->tf.flags & ATA_TFLAG_WRITE);
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003952 struct scatterlist *sg = qc->__sg;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003953 struct ata_port *ap = qc->ap;
3954 struct page *page;
3955 unsigned char *buf;
3956 unsigned int offset, count;
3957
Albert Lee563a6e12005-08-12 14:17:50 +08003958 if (qc->curbytes + bytes >= qc->nbytes)
Albert Lee14be71f2005-09-27 17:36:35 +08003959 ap->hsm_task_state = HSM_ST_LAST;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003960
3961next_sg:
Albert Lee563a6e12005-08-12 14:17:50 +08003962 if (unlikely(qc->cursg >= qc->n_elem)) {
Jeff Garzik7fb6ec22005-09-16 06:01:48 -04003963 /*
Albert Lee563a6e12005-08-12 14:17:50 +08003964 * The end of qc->sg is reached and the device expects
3965 * more data to transfer. In order not to overrun qc->sg
3966 * and fulfill length specified in the byte count register,
3967 * - for read case, discard trailing data from the device
3968 * - for write case, padding zero data to the device
3969 */
3970 u16 pad_buf[1] = { 0 };
3971 unsigned int words = bytes >> 1;
3972 unsigned int i;
3973
3974 if (words) /* warning if bytes > 1 */
Tejun Heof15a1da2006-05-15 20:57:56 +09003975 ata_dev_printk(qc->dev, KERN_WARNING,
3976 "%u bytes trailing data\n", bytes);
Albert Lee563a6e12005-08-12 14:17:50 +08003977
3978 for (i = 0; i < words; i++)
Alan Coxa6b2c5d2006-05-22 16:59:59 +01003979 ap->ops->data_xfer(qc->dev, (unsigned char*)pad_buf, 2, do_write);
Albert Lee563a6e12005-08-12 14:17:50 +08003980
Albert Lee14be71f2005-09-27 17:36:35 +08003981 ap->hsm_task_state = HSM_ST_LAST;
Albert Lee563a6e12005-08-12 14:17:50 +08003982 return;
3983 }
3984
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003985 sg = &qc->__sg[qc->cursg];
Linus Torvalds1da177e2005-04-16 15:20:36 -07003986
Linus Torvalds1da177e2005-04-16 15:20:36 -07003987 page = sg->page;
3988 offset = sg->offset + qc->cursg_ofs;
3989
3990 /* get the current page and offset */
3991 page = nth_page(page, (offset >> PAGE_SHIFT));
3992 offset %= PAGE_SIZE;
3993
Albert Lee6952df02005-06-06 15:56:03 +08003994 /* don't overrun current sg */
Albert Lee32529e02005-05-26 03:49:42 -04003995 count = min(sg->length - qc->cursg_ofs, bytes);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003996
3997 /* don't cross page boundaries */
3998 count = min(count, (unsigned int)PAGE_SIZE - offset);
3999
Albert Lee7282aa42005-10-09 09:46:07 -04004000 DPRINTK("data %s\n", qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read");
4001
Albert Lee91b8b312005-10-09 09:48:44 -04004002 if (PageHighMem(page)) {
4003 unsigned long flags;
Albert Lee7282aa42005-10-09 09:46:07 -04004004
Alan Coxa6b2c5d2006-05-22 16:59:59 +01004005 /* FIXME: use bounce buffer */
Albert Lee91b8b312005-10-09 09:48:44 -04004006 local_irq_save(flags);
4007 buf = kmap_atomic(page, KM_IRQ0);
Albert Lee083958d2005-10-09 09:47:31 -04004008
Albert Lee91b8b312005-10-09 09:48:44 -04004009 /* do the actual data transfer */
Alan Coxa6b2c5d2006-05-22 16:59:59 +01004010 ap->ops->data_xfer(qc->dev, buf + offset, count, do_write);
Albert Lee91b8b312005-10-09 09:48:44 -04004011
4012 kunmap_atomic(buf, KM_IRQ0);
4013 local_irq_restore(flags);
4014 } else {
4015 buf = page_address(page);
Alan Coxa6b2c5d2006-05-22 16:59:59 +01004016 ap->ops->data_xfer(qc->dev, buf + offset, count, do_write);
Albert Lee91b8b312005-10-09 09:48:44 -04004017 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07004018
4019 bytes -= count;
4020 qc->curbytes += count;
4021 qc->cursg_ofs += count;
4022
Albert Lee32529e02005-05-26 03:49:42 -04004023 if (qc->cursg_ofs == sg->length) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07004024 qc->cursg++;
4025 qc->cursg_ofs = 0;
4026 }
4027
Albert Lee563a6e12005-08-12 14:17:50 +08004028 if (bytes)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004029 goto next_sg;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004030}
4031
Albert Lee6ae4cfb2005-08-12 14:15:34 +08004032/**
4033 * atapi_pio_bytes - Transfer data from/to the ATAPI device.
4034 * @qc: Command on going
4035 *
4036 * Transfer Transfer data from/to the ATAPI device.
4037 *
4038 * LOCKING:
4039 * Inherited from caller.
Albert Lee6ae4cfb2005-08-12 14:15:34 +08004040 */
4041
Linus Torvalds1da177e2005-04-16 15:20:36 -07004042static void atapi_pio_bytes(struct ata_queued_cmd *qc)
4043{
4044 struct ata_port *ap = qc->ap;
4045 struct ata_device *dev = qc->dev;
4046 unsigned int ireason, bc_lo, bc_hi, bytes;
4047 int i_write, do_write = (qc->tf.flags & ATA_TFLAG_WRITE) ? 1 : 0;
4048
Albert Leeeec4c3f2006-05-18 17:51:10 +08004049 /* Abuse qc->result_tf for temp storage of intermediate TF
4050 * here to save some kernel stack usage.
4051 * For normal completion, qc->result_tf is not relevant. For
4052 * error, qc->result_tf is later overwritten by ata_qc_complete().
4053 * So, the correctness of qc->result_tf is not affected.
4054 */
4055 ap->ops->tf_read(ap, &qc->result_tf);
4056 ireason = qc->result_tf.nsect;
4057 bc_lo = qc->result_tf.lbam;
4058 bc_hi = qc->result_tf.lbah;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004059 bytes = (bc_hi << 8) | bc_lo;
4060
4061 /* shall be cleared to zero, indicating xfer of data */
4062 if (ireason & (1 << 0))
4063 goto err_out;
4064
4065 /* make sure transfer direction matches expected */
4066 i_write = ((ireason & (1 << 1)) == 0) ? 1 : 0;
4067 if (do_write != i_write)
4068 goto err_out;
4069
Albert Lee312f7da2005-09-27 17:38:03 +08004070 VPRINTK("ata%u: xfering %d bytes\n", ap->id, bytes);
4071
Linus Torvalds1da177e2005-04-16 15:20:36 -07004072 __atapi_pio_bytes(qc, bytes);
4073
4074 return;
4075
4076err_out:
Tejun Heof15a1da2006-05-15 20:57:56 +09004077 ata_dev_printk(dev, KERN_INFO, "ATAPI check failed\n");
Tejun Heo11a56d22006-01-23 13:09:36 +09004078 qc->err_mask |= AC_ERR_HSM;
Albert Lee14be71f2005-09-27 17:36:35 +08004079 ap->hsm_task_state = HSM_ST_ERR;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004080}
4081
4082/**
Albert Leec234fb02006-03-25 17:58:38 +08004083 * ata_hsm_ok_in_wq - Check if the qc can be handled in the workqueue.
4084 * @ap: the target ata_port
4085 * @qc: qc on going
Linus Torvalds1da177e2005-04-16 15:20:36 -07004086 *
Albert Leec234fb02006-03-25 17:58:38 +08004087 * RETURNS:
4088 * 1 if ok in workqueue, 0 otherwise.
Linus Torvalds1da177e2005-04-16 15:20:36 -07004089 */
Albert Leec234fb02006-03-25 17:58:38 +08004090
4091static inline int ata_hsm_ok_in_wq(struct ata_port *ap, struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004092{
Albert Leec234fb02006-03-25 17:58:38 +08004093 if (qc->tf.flags & ATA_TFLAG_POLLING)
4094 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004095
Albert Leec234fb02006-03-25 17:58:38 +08004096 if (ap->hsm_task_state == HSM_ST_FIRST) {
4097 if (qc->tf.protocol == ATA_PROT_PIO &&
4098 (qc->tf.flags & ATA_TFLAG_WRITE))
4099 return 1;
4100
4101 if (is_atapi_taskfile(&qc->tf) &&
4102 !(qc->dev->flags & ATA_DFLAG_CDB_INTR))
4103 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004104 }
4105
Albert Leec234fb02006-03-25 17:58:38 +08004106 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004107}
4108
Albert Leec234fb02006-03-25 17:58:38 +08004109/**
Tejun Heoc17ea202006-05-15 20:59:29 +09004110 * ata_hsm_qc_complete - finish a qc running on standard HSM
4111 * @qc: Command to complete
4112 * @in_wq: 1 if called from workqueue, 0 otherwise
4113 *
4114 * Finish @qc which is running on standard HSM.
4115 *
4116 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04004117 * If @in_wq is zero, spin_lock_irqsave(host lock).
Tejun Heoc17ea202006-05-15 20:59:29 +09004118 * Otherwise, none on entry and grabs host lock.
4119 */
4120static void ata_hsm_qc_complete(struct ata_queued_cmd *qc, int in_wq)
4121{
4122 struct ata_port *ap = qc->ap;
4123 unsigned long flags;
4124
4125 if (ap->ops->error_handler) {
4126 if (in_wq) {
Jeff Garzikba6a1302006-06-22 23:46:10 -04004127 spin_lock_irqsave(ap->lock, flags);
Tejun Heoc17ea202006-05-15 20:59:29 +09004128
Jeff Garzikcca39742006-08-24 03:19:22 -04004129 /* EH might have kicked in while host lock is
4130 * released.
Tejun Heoc17ea202006-05-15 20:59:29 +09004131 */
4132 qc = ata_qc_from_tag(ap, qc->tag);
4133 if (qc) {
4134 if (likely(!(qc->err_mask & AC_ERR_HSM))) {
4135 ata_irq_on(ap);
4136 ata_qc_complete(qc);
4137 } else
4138 ata_port_freeze(ap);
4139 }
4140
Jeff Garzikba6a1302006-06-22 23:46:10 -04004141 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heoc17ea202006-05-15 20:59:29 +09004142 } else {
4143 if (likely(!(qc->err_mask & AC_ERR_HSM)))
4144 ata_qc_complete(qc);
4145 else
4146 ata_port_freeze(ap);
4147 }
4148 } else {
4149 if (in_wq) {
Jeff Garzikba6a1302006-06-22 23:46:10 -04004150 spin_lock_irqsave(ap->lock, flags);
Tejun Heoc17ea202006-05-15 20:59:29 +09004151 ata_irq_on(ap);
4152 ata_qc_complete(qc);
Jeff Garzikba6a1302006-06-22 23:46:10 -04004153 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heoc17ea202006-05-15 20:59:29 +09004154 } else
4155 ata_qc_complete(qc);
4156 }
Jeff Garzikc81e29b2006-05-24 01:49:12 -04004157
4158 ata_altstatus(ap); /* flush */
Tejun Heoc17ea202006-05-15 20:59:29 +09004159}
4160
4161/**
Albert Leebb5cb292006-03-25 17:48:02 +08004162 * ata_hsm_move - move the HSM to the next state.
4163 * @ap: the target ata_port
4164 * @qc: qc on going
4165 * @status: current device status
4166 * @in_wq: 1 if called from workqueue, 0 otherwise
4167 *
4168 * RETURNS:
4169 * 1 when poll next status needed, 0 otherwise.
4170 */
Tejun Heo9a1004d2006-05-31 18:27:52 +09004171int ata_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc,
4172 u8 status, int in_wq)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004173{
Albert Leebb5cb292006-03-25 17:48:02 +08004174 unsigned long flags = 0;
4175 int poll_next;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004176
Albert Lee6912ccd2006-03-25 17:45:49 +08004177 WARN_ON((qc->flags & ATA_QCFLAG_ACTIVE) == 0);
Albert Lee0565c262006-02-13 18:55:25 +08004178
Albert Leebb5cb292006-03-25 17:48:02 +08004179 /* Make sure ata_qc_issue_prot() does not throw things
4180 * like DMA polling into the workqueue. Notice that
4181 * in_wq is not equivalent to (qc->tf.flags & ATA_TFLAG_POLLING).
Albert Lee1c848982005-12-05 15:40:15 +08004182 */
Albert Leec234fb02006-03-25 17:58:38 +08004183 WARN_ON(in_wq != ata_hsm_ok_in_wq(ap, qc));
Albert Lee1c848982005-12-05 15:40:15 +08004184
Albert Leee2cec772006-03-25 17:43:49 +08004185fsm_start:
Albert Lee999bb6f2006-03-25 18:07:48 +08004186 DPRINTK("ata%u: protocol %d task_state %d (dev_stat 0x%X)\n",
4187 ap->id, qc->tf.protocol, ap->hsm_task_state, status);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004188
Albert Leee2cec772006-03-25 17:43:49 +08004189 switch (ap->hsm_task_state) {
4190 case HSM_ST_FIRST:
Albert Leebb5cb292006-03-25 17:48:02 +08004191 /* Send first data block or PACKET CDB */
4192
4193 /* If polling, we will stay in the work queue after
4194 * sending the data. Otherwise, interrupt handler
4195 * takes over after sending the data.
4196 */
4197 poll_next = (qc->tf.flags & ATA_TFLAG_POLLING);
4198
Albert Leee2cec772006-03-25 17:43:49 +08004199 /* check device status */
Albert Lee3655d1d2006-05-19 11:43:04 +08004200 if (unlikely((status & ATA_DRQ) == 0)) {
4201 /* handle BSY=0, DRQ=0 as error */
4202 if (likely(status & (ATA_ERR | ATA_DF)))
4203 /* device stops HSM for abort/error */
4204 qc->err_mask |= AC_ERR_DEV;
4205 else
4206 /* HSM violation. Let EH handle this */
4207 qc->err_mask |= AC_ERR_HSM;
4208
Albert Leee2cec772006-03-25 17:43:49 +08004209 ap->hsm_task_state = HSM_ST_ERR;
4210 goto fsm_start;
4211 }
4212
Albert Lee71601952006-03-25 18:11:12 +08004213 /* Device should not ask for data transfer (DRQ=1)
4214 * when it finds something wrong.
Albert Leeeee6c322006-04-01 17:38:43 +08004215 * We ignore DRQ here and stop the HSM by
4216 * changing hsm_task_state to HSM_ST_ERR and
4217 * let the EH abort the command or reset the device.
Albert Lee71601952006-03-25 18:11:12 +08004218 */
4219 if (unlikely(status & (ATA_ERR | ATA_DF))) {
4220 printk(KERN_WARNING "ata%d: DRQ=1 with device error, dev_stat 0x%X\n",
4221 ap->id, status);
Albert Lee3655d1d2006-05-19 11:43:04 +08004222 qc->err_mask |= AC_ERR_HSM;
Albert Leeeee6c322006-04-01 17:38:43 +08004223 ap->hsm_task_state = HSM_ST_ERR;
4224 goto fsm_start;
Albert Lee71601952006-03-25 18:11:12 +08004225 }
4226
Albert Leebb5cb292006-03-25 17:48:02 +08004227 /* Send the CDB (atapi) or the first data block (ata pio out).
4228 * During the state transition, interrupt handler shouldn't
4229 * be invoked before the data transfer is complete and
4230 * hsm_task_state is changed. Hence, the following locking.
4231 */
4232 if (in_wq)
Jeff Garzikba6a1302006-06-22 23:46:10 -04004233 spin_lock_irqsave(ap->lock, flags);
Albert Leee2cec772006-03-25 17:43:49 +08004234
Albert Leebb5cb292006-03-25 17:48:02 +08004235 if (qc->tf.protocol == ATA_PROT_PIO) {
4236 /* PIO data out protocol.
4237 * send first data block.
4238 */
4239
4240 /* ata_pio_sectors() might change the state
4241 * to HSM_ST_LAST. so, the state is changed here
4242 * before ata_pio_sectors().
4243 */
4244 ap->hsm_task_state = HSM_ST;
4245 ata_pio_sectors(qc);
4246 ata_altstatus(ap); /* flush */
4247 } else
4248 /* send CDB */
4249 atapi_send_cdb(ap, qc);
4250
4251 if (in_wq)
Jeff Garzikba6a1302006-06-22 23:46:10 -04004252 spin_unlock_irqrestore(ap->lock, flags);
Albert Leebb5cb292006-03-25 17:48:02 +08004253
4254 /* if polling, ata_pio_task() handles the rest.
4255 * otherwise, interrupt handler takes over from here.
4256 */
Albert Leee2cec772006-03-25 17:43:49 +08004257 break;
4258
4259 case HSM_ST:
4260 /* complete command or read/write the data register */
4261 if (qc->tf.protocol == ATA_PROT_ATAPI) {
4262 /* ATAPI PIO protocol */
4263 if ((status & ATA_DRQ) == 0) {
Albert Lee3655d1d2006-05-19 11:43:04 +08004264 /* No more data to transfer or device error.
4265 * Device error will be tagged in HSM_ST_LAST.
4266 */
Albert Leee2cec772006-03-25 17:43:49 +08004267 ap->hsm_task_state = HSM_ST_LAST;
4268 goto fsm_start;
4269 }
4270
Albert Lee71601952006-03-25 18:11:12 +08004271 /* Device should not ask for data transfer (DRQ=1)
4272 * when it finds something wrong.
Albert Leeeee6c322006-04-01 17:38:43 +08004273 * We ignore DRQ here and stop the HSM by
4274 * changing hsm_task_state to HSM_ST_ERR and
4275 * let the EH abort the command or reset the device.
Albert Lee71601952006-03-25 18:11:12 +08004276 */
4277 if (unlikely(status & (ATA_ERR | ATA_DF))) {
4278 printk(KERN_WARNING "ata%d: DRQ=1 with device error, dev_stat 0x%X\n",
4279 ap->id, status);
Albert Lee3655d1d2006-05-19 11:43:04 +08004280 qc->err_mask |= AC_ERR_HSM;
Albert Leeeee6c322006-04-01 17:38:43 +08004281 ap->hsm_task_state = HSM_ST_ERR;
4282 goto fsm_start;
Albert Lee71601952006-03-25 18:11:12 +08004283 }
4284
Albert Leee2cec772006-03-25 17:43:49 +08004285 atapi_pio_bytes(qc);
4286
4287 if (unlikely(ap->hsm_task_state == HSM_ST_ERR))
4288 /* bad ireason reported by device */
4289 goto fsm_start;
4290
4291 } else {
4292 /* ATA PIO protocol */
4293 if (unlikely((status & ATA_DRQ) == 0)) {
4294 /* handle BSY=0, DRQ=0 as error */
Albert Lee3655d1d2006-05-19 11:43:04 +08004295 if (likely(status & (ATA_ERR | ATA_DF)))
4296 /* device stops HSM for abort/error */
4297 qc->err_mask |= AC_ERR_DEV;
4298 else
Tejun Heo55a8e2c2006-11-10 18:08:10 +09004299 /* HSM violation. Let EH handle this.
4300 * Phantom devices also trigger this
4301 * condition. Mark hint.
4302 */
4303 qc->err_mask |= AC_ERR_HSM |
4304 AC_ERR_NODEV_HINT;
Albert Lee3655d1d2006-05-19 11:43:04 +08004305
Albert Leee2cec772006-03-25 17:43:49 +08004306 ap->hsm_task_state = HSM_ST_ERR;
4307 goto fsm_start;
4308 }
4309
Albert Leeeee6c322006-04-01 17:38:43 +08004310 /* For PIO reads, some devices may ask for
4311 * data transfer (DRQ=1) alone with ERR=1.
4312 * We respect DRQ here and transfer one
4313 * block of junk data before changing the
4314 * hsm_task_state to HSM_ST_ERR.
4315 *
4316 * For PIO writes, ERR=1 DRQ=1 doesn't make
4317 * sense since the data block has been
4318 * transferred to the device.
Albert Lee71601952006-03-25 18:11:12 +08004319 */
4320 if (unlikely(status & (ATA_ERR | ATA_DF))) {
Albert Lee71601952006-03-25 18:11:12 +08004321 /* data might be corrputed */
4322 qc->err_mask |= AC_ERR_DEV;
Albert Leeeee6c322006-04-01 17:38:43 +08004323
4324 if (!(qc->tf.flags & ATA_TFLAG_WRITE)) {
4325 ata_pio_sectors(qc);
4326 ata_altstatus(ap);
4327 status = ata_wait_idle(ap);
4328 }
4329
Albert Lee3655d1d2006-05-19 11:43:04 +08004330 if (status & (ATA_BUSY | ATA_DRQ))
4331 qc->err_mask |= AC_ERR_HSM;
4332
Albert Leeeee6c322006-04-01 17:38:43 +08004333 /* ata_pio_sectors() might change the
4334 * state to HSM_ST_LAST. so, the state
4335 * is changed after ata_pio_sectors().
4336 */
4337 ap->hsm_task_state = HSM_ST_ERR;
4338 goto fsm_start;
Albert Lee71601952006-03-25 18:11:12 +08004339 }
4340
Albert Leee2cec772006-03-25 17:43:49 +08004341 ata_pio_sectors(qc);
4342
4343 if (ap->hsm_task_state == HSM_ST_LAST &&
4344 (!(qc->tf.flags & ATA_TFLAG_WRITE))) {
4345 /* all data read */
4346 ata_altstatus(ap);
Albert Lee52a32202006-03-25 18:18:15 +08004347 status = ata_wait_idle(ap);
Albert Leee2cec772006-03-25 17:43:49 +08004348 goto fsm_start;
4349 }
4350 }
4351
4352 ata_altstatus(ap); /* flush */
Albert Leebb5cb292006-03-25 17:48:02 +08004353 poll_next = 1;
Albert Leee2cec772006-03-25 17:43:49 +08004354 break;
4355
4356 case HSM_ST_LAST:
Albert Lee6912ccd2006-03-25 17:45:49 +08004357 if (unlikely(!ata_ok(status))) {
4358 qc->err_mask |= __ac_err_mask(status);
Albert Leee2cec772006-03-25 17:43:49 +08004359 ap->hsm_task_state = HSM_ST_ERR;
4360 goto fsm_start;
4361 }
4362
4363 /* no more data to transfer */
Albert Lee4332a772006-04-03 17:43:24 +08004364 DPRINTK("ata%u: dev %u command complete, drv_stat 0x%x\n",
4365 ap->id, qc->dev->devno, status);
Albert Leee2cec772006-03-25 17:43:49 +08004366
Albert Lee6912ccd2006-03-25 17:45:49 +08004367 WARN_ON(qc->err_mask);
4368
Albert Leee2cec772006-03-25 17:43:49 +08004369 ap->hsm_task_state = HSM_ST_IDLE;
4370
4371 /* complete taskfile transaction */
Tejun Heoc17ea202006-05-15 20:59:29 +09004372 ata_hsm_qc_complete(qc, in_wq);
Albert Leebb5cb292006-03-25 17:48:02 +08004373
4374 poll_next = 0;
Albert Leee2cec772006-03-25 17:43:49 +08004375 break;
4376
4377 case HSM_ST_ERR:
Albert Leee2cec772006-03-25 17:43:49 +08004378 /* make sure qc->err_mask is available to
4379 * know what's wrong and recover
4380 */
4381 WARN_ON(qc->err_mask == 0);
4382
4383 ap->hsm_task_state = HSM_ST_IDLE;
Albert Leebb5cb292006-03-25 17:48:02 +08004384
Albert Lee999bb6f2006-03-25 18:07:48 +08004385 /* complete taskfile transaction */
Tejun Heoc17ea202006-05-15 20:59:29 +09004386 ata_hsm_qc_complete(qc, in_wq);
Albert Leebb5cb292006-03-25 17:48:02 +08004387
4388 poll_next = 0;
Albert Leee2cec772006-03-25 17:43:49 +08004389 break;
4390 default:
Albert Leebb5cb292006-03-25 17:48:02 +08004391 poll_next = 0;
Albert Lee6912ccd2006-03-25 17:45:49 +08004392 BUG();
Albert Leee2cec772006-03-25 17:43:49 +08004393 }
4394
Albert Leebb5cb292006-03-25 17:48:02 +08004395 return poll_next;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004396}
4397
4398static void ata_pio_task(void *_data)
4399{
Tejun Heoc91af2c2006-04-02 18:51:53 +09004400 struct ata_queued_cmd *qc = _data;
4401 struct ata_port *ap = qc->ap;
Albert Leea1af3732006-03-25 17:50:15 +08004402 u8 status;
4403 int poll_next;
Jeff Garzik7fb6ec22005-09-16 06:01:48 -04004404
4405fsm_start:
Albert Leea1af3732006-03-25 17:50:15 +08004406 WARN_ON(ap->hsm_task_state == HSM_ST_IDLE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004407
Albert Leea1af3732006-03-25 17:50:15 +08004408 /*
4409 * This is purely heuristic. This is a fast path.
4410 * Sometimes when we enter, BSY will be cleared in
4411 * a chk-status or two. If not, the drive is probably seeking
4412 * or something. Snooze for a couple msecs, then
4413 * chk-status again. If still busy, queue delayed work.
4414 */
4415 status = ata_busy_wait(ap, ATA_BUSY, 5);
4416 if (status & ATA_BUSY) {
4417 msleep(2);
4418 status = ata_busy_wait(ap, ATA_BUSY, 10);
4419 if (status & ATA_BUSY) {
Albert Lee31ce6da2006-04-03 18:31:44 +08004420 ata_port_queue_task(ap, ata_pio_task, qc, ATA_SHORT_PAUSE);
Albert Leea1af3732006-03-25 17:50:15 +08004421 return;
4422 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07004423 }
4424
Albert Leea1af3732006-03-25 17:50:15 +08004425 /* move the HSM */
4426 poll_next = ata_hsm_move(ap, qc, status, 1);
4427
4428 /* another command or interrupt handler
4429 * may be running at this point.
4430 */
4431 if (poll_next)
Jeff Garzik7fb6ec22005-09-16 06:01:48 -04004432 goto fsm_start;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004433}
4434
Linus Torvalds1da177e2005-04-16 15:20:36 -07004435/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07004436 * ata_qc_new - Request an available ATA command, for queueing
4437 * @ap: Port associated with device @dev
4438 * @dev: Device from whom we request an available command structure
4439 *
4440 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04004441 * None.
Linus Torvalds1da177e2005-04-16 15:20:36 -07004442 */
4443
4444static struct ata_queued_cmd *ata_qc_new(struct ata_port *ap)
4445{
4446 struct ata_queued_cmd *qc = NULL;
4447 unsigned int i;
4448
Tejun Heoe3180492006-05-15 20:58:09 +09004449 /* no command while frozen */
Tejun Heob51e9e52006-06-29 01:29:30 +09004450 if (unlikely(ap->pflags & ATA_PFLAG_FROZEN))
Tejun Heoe3180492006-05-15 20:58:09 +09004451 return NULL;
4452
Tejun Heo2ab7db12006-05-15 20:58:02 +09004453 /* the last tag is reserved for internal command. */
4454 for (i = 0; i < ATA_MAX_QUEUE - 1; i++)
Tejun Heo6cec4a32006-05-15 21:03:41 +09004455 if (!test_and_set_bit(i, &ap->qc_allocated)) {
Tejun Heof69499f2006-05-15 20:58:03 +09004456 qc = __ata_qc_from_tag(ap, i);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004457 break;
4458 }
4459
4460 if (qc)
4461 qc->tag = i;
4462
4463 return qc;
4464}
4465
4466/**
4467 * ata_qc_new_init - Request an available ATA command, and initialize it
Linus Torvalds1da177e2005-04-16 15:20:36 -07004468 * @dev: Device from whom we request an available command structure
4469 *
4470 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04004471 * None.
Linus Torvalds1da177e2005-04-16 15:20:36 -07004472 */
4473
Tejun Heo3373efd2006-05-15 20:57:53 +09004474struct ata_queued_cmd *ata_qc_new_init(struct ata_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004475{
Tejun Heo3373efd2006-05-15 20:57:53 +09004476 struct ata_port *ap = dev->ap;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004477 struct ata_queued_cmd *qc;
4478
4479 qc = ata_qc_new(ap);
4480 if (qc) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07004481 qc->scsicmd = NULL;
4482 qc->ap = ap;
4483 qc->dev = dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004484
Jeff Garzik2c13b7c2005-11-14 14:14:16 -05004485 ata_qc_reinit(qc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004486 }
4487
4488 return qc;
4489}
4490
Linus Torvalds1da177e2005-04-16 15:20:36 -07004491/**
4492 * ata_qc_free - free unused ata_queued_cmd
4493 * @qc: Command to complete
4494 *
4495 * Designed to free unused ata_queued_cmd object
4496 * in case something prevents using it.
4497 *
4498 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04004499 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004500 */
4501void ata_qc_free(struct ata_queued_cmd *qc)
4502{
Tejun Heo4ba946e2006-01-23 13:09:36 +09004503 struct ata_port *ap = qc->ap;
4504 unsigned int tag;
4505
Tejun Heoa46314742006-02-11 19:11:13 +09004506 WARN_ON(qc == NULL); /* ata_qc_from_tag _might_ return NULL */
Linus Torvalds1da177e2005-04-16 15:20:36 -07004507
Tejun Heo4ba946e2006-01-23 13:09:36 +09004508 qc->flags = 0;
4509 tag = qc->tag;
4510 if (likely(ata_tag_valid(tag))) {
Tejun Heo4ba946e2006-01-23 13:09:36 +09004511 qc->tag = ATA_TAG_POISON;
Tejun Heo6cec4a32006-05-15 21:03:41 +09004512 clear_bit(tag, &ap->qc_allocated);
Tejun Heo4ba946e2006-01-23 13:09:36 +09004513 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07004514}
4515
Tejun Heo76014422006-02-11 15:13:49 +09004516void __ata_qc_complete(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004517{
Tejun Heodedaf2b2006-05-15 21:03:43 +09004518 struct ata_port *ap = qc->ap;
4519
Tejun Heoa46314742006-02-11 19:11:13 +09004520 WARN_ON(qc == NULL); /* ata_qc_from_tag _might_ return NULL */
4521 WARN_ON(!(qc->flags & ATA_QCFLAG_ACTIVE));
Linus Torvalds1da177e2005-04-16 15:20:36 -07004522
4523 if (likely(qc->flags & ATA_QCFLAG_DMAMAP))
4524 ata_sg_clean(qc);
4525
Tejun Heo7401abf2006-05-15 20:57:32 +09004526 /* command should be marked inactive atomically with qc completion */
Tejun Heodedaf2b2006-05-15 21:03:43 +09004527 if (qc->tf.protocol == ATA_PROT_NCQ)
4528 ap->sactive &= ~(1 << qc->tag);
4529 else
4530 ap->active_tag = ATA_TAG_POISON;
Tejun Heo7401abf2006-05-15 20:57:32 +09004531
Albert Lee3f3791d2005-08-16 14:25:38 +08004532 /* atapi: mark qc as inactive to prevent the interrupt handler
4533 * from completing the command twice later, before the error handler
4534 * is called. (when rc != 0 and atapi request sense is needed)
4535 */
4536 qc->flags &= ~ATA_QCFLAG_ACTIVE;
Tejun Heodedaf2b2006-05-15 21:03:43 +09004537 ap->qc_active &= ~(1 << qc->tag);
Albert Lee3f3791d2005-08-16 14:25:38 +08004538
Linus Torvalds1da177e2005-04-16 15:20:36 -07004539 /* call completion callback */
Tejun Heo77853bf2006-01-23 13:09:36 +09004540 qc->complete_fn(qc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004541}
4542
Tejun Heof686bcb2006-05-15 20:58:05 +09004543/**
4544 * ata_qc_complete - Complete an active ATA command
4545 * @qc: Command to complete
4546 * @err_mask: ATA Status register contents
4547 *
4548 * Indicate to the mid and upper layers that an ATA
4549 * command has completed, with either an ok or not-ok status.
4550 *
4551 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04004552 * spin_lock_irqsave(host lock)
Tejun Heof686bcb2006-05-15 20:58:05 +09004553 */
4554void ata_qc_complete(struct ata_queued_cmd *qc)
4555{
4556 struct ata_port *ap = qc->ap;
4557
4558 /* XXX: New EH and old EH use different mechanisms to
4559 * synchronize EH with regular execution path.
4560 *
4561 * In new EH, a failed qc is marked with ATA_QCFLAG_FAILED.
4562 * Normal execution path is responsible for not accessing a
4563 * failed qc. libata core enforces the rule by returning NULL
4564 * from ata_qc_from_tag() for failed qcs.
4565 *
4566 * Old EH depends on ata_qc_complete() nullifying completion
4567 * requests if ATA_QCFLAG_EH_SCHEDULED is set. Old EH does
4568 * not synchronize with interrupt handler. Only PIO task is
4569 * taken care of.
4570 */
4571 if (ap->ops->error_handler) {
Tejun Heob51e9e52006-06-29 01:29:30 +09004572 WARN_ON(ap->pflags & ATA_PFLAG_FROZEN);
Tejun Heof686bcb2006-05-15 20:58:05 +09004573
4574 if (unlikely(qc->err_mask))
4575 qc->flags |= ATA_QCFLAG_FAILED;
4576
4577 if (unlikely(qc->flags & ATA_QCFLAG_FAILED)) {
4578 if (!ata_tag_internal(qc->tag)) {
4579 /* always fill result TF for failed qc */
4580 ap->ops->tf_read(ap, &qc->result_tf);
4581 ata_qc_schedule_eh(qc);
4582 return;
4583 }
4584 }
4585
4586 /* read result TF if requested */
4587 if (qc->flags & ATA_QCFLAG_RESULT_TF)
4588 ap->ops->tf_read(ap, &qc->result_tf);
4589
4590 __ata_qc_complete(qc);
4591 } else {
4592 if (qc->flags & ATA_QCFLAG_EH_SCHEDULED)
4593 return;
4594
4595 /* read result TF if failed or requested */
4596 if (qc->err_mask || qc->flags & ATA_QCFLAG_RESULT_TF)
4597 ap->ops->tf_read(ap, &qc->result_tf);
4598
4599 __ata_qc_complete(qc);
4600 }
4601}
4602
Tejun Heodedaf2b2006-05-15 21:03:43 +09004603/**
4604 * ata_qc_complete_multiple - Complete multiple qcs successfully
4605 * @ap: port in question
4606 * @qc_active: new qc_active mask
4607 * @finish_qc: LLDD callback invoked before completing a qc
4608 *
4609 * Complete in-flight commands. This functions is meant to be
4610 * called from low-level driver's interrupt routine to complete
4611 * requests normally. ap->qc_active and @qc_active is compared
4612 * and commands are completed accordingly.
4613 *
4614 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04004615 * spin_lock_irqsave(host lock)
Tejun Heodedaf2b2006-05-15 21:03:43 +09004616 *
4617 * RETURNS:
4618 * Number of completed commands on success, -errno otherwise.
4619 */
4620int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active,
4621 void (*finish_qc)(struct ata_queued_cmd *))
4622{
4623 int nr_done = 0;
4624 u32 done_mask;
4625 int i;
4626
4627 done_mask = ap->qc_active ^ qc_active;
4628
4629 if (unlikely(done_mask & qc_active)) {
4630 ata_port_printk(ap, KERN_ERR, "illegal qc_active transition "
4631 "(%08x->%08x)\n", ap->qc_active, qc_active);
4632 return -EINVAL;
4633 }
4634
4635 for (i = 0; i < ATA_MAX_QUEUE; i++) {
4636 struct ata_queued_cmd *qc;
4637
4638 if (!(done_mask & (1 << i)))
4639 continue;
4640
4641 if ((qc = ata_qc_from_tag(ap, i))) {
4642 if (finish_qc)
4643 finish_qc(qc);
4644 ata_qc_complete(qc);
4645 nr_done++;
4646 }
4647 }
4648
4649 return nr_done;
4650}
4651
Linus Torvalds1da177e2005-04-16 15:20:36 -07004652static inline int ata_should_dma_map(struct ata_queued_cmd *qc)
4653{
4654 struct ata_port *ap = qc->ap;
4655
4656 switch (qc->tf.protocol) {
Tejun Heo3dc1d882006-05-15 21:03:45 +09004657 case ATA_PROT_NCQ:
Linus Torvalds1da177e2005-04-16 15:20:36 -07004658 case ATA_PROT_DMA:
4659 case ATA_PROT_ATAPI_DMA:
4660 return 1;
4661
4662 case ATA_PROT_ATAPI:
4663 case ATA_PROT_PIO:
Linus Torvalds1da177e2005-04-16 15:20:36 -07004664 if (ap->flags & ATA_FLAG_PIO_DMA)
4665 return 1;
4666
4667 /* fall through */
4668
4669 default:
4670 return 0;
4671 }
4672
4673 /* never reached */
4674}
4675
4676/**
4677 * ata_qc_issue - issue taskfile to device
4678 * @qc: command to issue to device
4679 *
4680 * Prepare an ATA command to submission to device.
4681 * This includes mapping the data into a DMA-able
4682 * area, filling in the S/G table, and finally
4683 * writing the taskfile to hardware, starting the command.
4684 *
4685 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04004686 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004687 */
Tejun Heo8e0e6942006-03-31 20:41:11 +09004688void ata_qc_issue(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004689{
4690 struct ata_port *ap = qc->ap;
4691
Tejun Heodedaf2b2006-05-15 21:03:43 +09004692 /* Make sure only one non-NCQ command is outstanding. The
4693 * check is skipped for old EH because it reuses active qc to
4694 * request ATAPI sense.
4695 */
4696 WARN_ON(ap->ops->error_handler && ata_tag_valid(ap->active_tag));
4697
4698 if (qc->tf.protocol == ATA_PROT_NCQ) {
4699 WARN_ON(ap->sactive & (1 << qc->tag));
4700 ap->sactive |= 1 << qc->tag;
4701 } else {
4702 WARN_ON(ap->sactive);
4703 ap->active_tag = qc->tag;
4704 }
4705
Tejun Heoe4a70e72006-03-31 20:36:47 +09004706 qc->flags |= ATA_QCFLAG_ACTIVE;
Tejun Heodedaf2b2006-05-15 21:03:43 +09004707 ap->qc_active |= 1 << qc->tag;
Tejun Heoe4a70e72006-03-31 20:36:47 +09004708
Linus Torvalds1da177e2005-04-16 15:20:36 -07004709 if (ata_should_dma_map(qc)) {
4710 if (qc->flags & ATA_QCFLAG_SG) {
4711 if (ata_sg_setup(qc))
Tejun Heo8e436af2006-01-23 13:09:36 +09004712 goto sg_err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004713 } else if (qc->flags & ATA_QCFLAG_SINGLE) {
4714 if (ata_sg_setup_one(qc))
Tejun Heo8e436af2006-01-23 13:09:36 +09004715 goto sg_err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004716 }
4717 } else {
4718 qc->flags &= ~ATA_QCFLAG_DMAMAP;
4719 }
4720
4721 ap->ops->qc_prep(qc);
4722
Tejun Heo8e0e6942006-03-31 20:41:11 +09004723 qc->err_mask |= ap->ops->qc_issue(qc);
4724 if (unlikely(qc->err_mask))
4725 goto err;
4726 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004727
Tejun Heo8e436af2006-01-23 13:09:36 +09004728sg_err:
4729 qc->flags &= ~ATA_QCFLAG_DMAMAP;
Tejun Heo8e0e6942006-03-31 20:41:11 +09004730 qc->err_mask |= AC_ERR_SYSTEM;
4731err:
4732 ata_qc_complete(qc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004733}
4734
4735/**
4736 * ata_qc_issue_prot - issue taskfile to device in proto-dependent manner
4737 * @qc: command to issue to device
4738 *
4739 * Using various libata functions and hooks, this function
4740 * starts an ATA command. ATA commands are grouped into
4741 * classes called "protocols", and issuing each type of protocol
4742 * is slightly different.
4743 *
Edward Falk0baab862005-06-02 18:17:13 -04004744 * May be used as the qc_issue() entry in ata_port_operations.
4745 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07004746 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04004747 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004748 *
4749 * RETURNS:
Tejun Heo9a3d9eb2006-01-23 13:09:36 +09004750 * Zero on success, AC_ERR_* mask on failure
Linus Torvalds1da177e2005-04-16 15:20:36 -07004751 */
4752
Tejun Heo9a3d9eb2006-01-23 13:09:36 +09004753unsigned int ata_qc_issue_prot(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004754{
4755 struct ata_port *ap = qc->ap;
4756
Albert Leee50362e2005-09-27 17:39:50 +08004757 /* Use polling pio if the LLD doesn't handle
4758 * interrupt driven pio and atapi CDB interrupt.
4759 */
4760 if (ap->flags & ATA_FLAG_PIO_POLLING) {
4761 switch (qc->tf.protocol) {
4762 case ATA_PROT_PIO:
4763 case ATA_PROT_ATAPI:
4764 case ATA_PROT_ATAPI_NODATA:
4765 qc->tf.flags |= ATA_TFLAG_POLLING;
4766 break;
4767 case ATA_PROT_ATAPI_DMA:
4768 if (qc->dev->flags & ATA_DFLAG_CDB_INTR)
Albert Lee3a778272006-06-22 13:00:25 +08004769 /* see ata_dma_blacklisted() */
Albert Leee50362e2005-09-27 17:39:50 +08004770 BUG();
4771 break;
4772 default:
4773 break;
4774 }
4775 }
4776
Albert Lee312f7da2005-09-27 17:38:03 +08004777 /* select the device */
Linus Torvalds1da177e2005-04-16 15:20:36 -07004778 ata_dev_select(ap, qc->dev->devno, 1, 0);
4779
Albert Lee312f7da2005-09-27 17:38:03 +08004780 /* start the command */
Linus Torvalds1da177e2005-04-16 15:20:36 -07004781 switch (qc->tf.protocol) {
4782 case ATA_PROT_NODATA:
Albert Lee312f7da2005-09-27 17:38:03 +08004783 if (qc->tf.flags & ATA_TFLAG_POLLING)
4784 ata_qc_set_polling(qc);
4785
Jeff Garzike5338252005-10-30 21:37:17 -05004786 ata_tf_to_host(ap, &qc->tf);
Albert Lee312f7da2005-09-27 17:38:03 +08004787 ap->hsm_task_state = HSM_ST_LAST;
4788
4789 if (qc->tf.flags & ATA_TFLAG_POLLING)
Albert Lee31ce6da2006-04-03 18:31:44 +08004790 ata_port_queue_task(ap, ata_pio_task, qc, 0);
Albert Lee312f7da2005-09-27 17:38:03 +08004791
Linus Torvalds1da177e2005-04-16 15:20:36 -07004792 break;
4793
4794 case ATA_PROT_DMA:
Jeff Garzik587005d2006-02-11 18:17:32 -05004795 WARN_ON(qc->tf.flags & ATA_TFLAG_POLLING);
Albert Lee312f7da2005-09-27 17:38:03 +08004796
Linus Torvalds1da177e2005-04-16 15:20:36 -07004797 ap->ops->tf_load(ap, &qc->tf); /* load tf registers */
4798 ap->ops->bmdma_setup(qc); /* set up bmdma */
4799 ap->ops->bmdma_start(qc); /* initiate bmdma */
Albert Lee312f7da2005-09-27 17:38:03 +08004800 ap->hsm_task_state = HSM_ST_LAST;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004801 break;
4802
Albert Lee312f7da2005-09-27 17:38:03 +08004803 case ATA_PROT_PIO:
4804 if (qc->tf.flags & ATA_TFLAG_POLLING)
4805 ata_qc_set_polling(qc);
4806
Jeff Garzike5338252005-10-30 21:37:17 -05004807 ata_tf_to_host(ap, &qc->tf);
Albert Lee312f7da2005-09-27 17:38:03 +08004808
Albert Lee54f00382005-09-30 19:14:19 +08004809 if (qc->tf.flags & ATA_TFLAG_WRITE) {
4810 /* PIO data out protocol */
4811 ap->hsm_task_state = HSM_ST_FIRST;
Albert Lee31ce6da2006-04-03 18:31:44 +08004812 ata_port_queue_task(ap, ata_pio_task, qc, 0);
Albert Lee54f00382005-09-30 19:14:19 +08004813
4814 /* always send first data block using
Albert Leee27486d2005-11-01 19:24:49 +08004815 * the ata_pio_task() codepath.
Albert Lee54f00382005-09-30 19:14:19 +08004816 */
Albert Lee312f7da2005-09-27 17:38:03 +08004817 } else {
Albert Lee54f00382005-09-30 19:14:19 +08004818 /* PIO data in protocol */
4819 ap->hsm_task_state = HSM_ST;
Albert Lee312f7da2005-09-27 17:38:03 +08004820
Albert Lee54f00382005-09-30 19:14:19 +08004821 if (qc->tf.flags & ATA_TFLAG_POLLING)
Albert Lee31ce6da2006-04-03 18:31:44 +08004822 ata_port_queue_task(ap, ata_pio_task, qc, 0);
Albert Lee312f7da2005-09-27 17:38:03 +08004823
Albert Lee54f00382005-09-30 19:14:19 +08004824 /* if polling, ata_pio_task() handles the rest.
4825 * otherwise, interrupt handler takes over from here.
4826 */
Albert Lee312f7da2005-09-27 17:38:03 +08004827 }
4828
Linus Torvalds1da177e2005-04-16 15:20:36 -07004829 break;
4830
4831 case ATA_PROT_ATAPI:
Linus Torvalds1da177e2005-04-16 15:20:36 -07004832 case ATA_PROT_ATAPI_NODATA:
Albert Lee312f7da2005-09-27 17:38:03 +08004833 if (qc->tf.flags & ATA_TFLAG_POLLING)
4834 ata_qc_set_polling(qc);
4835
Jeff Garzike5338252005-10-30 21:37:17 -05004836 ata_tf_to_host(ap, &qc->tf);
Jeff Garzikf6ef65e2006-01-27 02:45:00 -05004837
Albert Lee312f7da2005-09-27 17:38:03 +08004838 ap->hsm_task_state = HSM_ST_FIRST;
4839
4840 /* send cdb by polling if no cdb interrupt */
4841 if ((!(qc->dev->flags & ATA_DFLAG_CDB_INTR)) ||
4842 (qc->tf.flags & ATA_TFLAG_POLLING))
Albert Lee31ce6da2006-04-03 18:31:44 +08004843 ata_port_queue_task(ap, ata_pio_task, qc, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004844 break;
4845
4846 case ATA_PROT_ATAPI_DMA:
Jeff Garzik587005d2006-02-11 18:17:32 -05004847 WARN_ON(qc->tf.flags & ATA_TFLAG_POLLING);
Albert Lee312f7da2005-09-27 17:38:03 +08004848
Linus Torvalds1da177e2005-04-16 15:20:36 -07004849 ap->ops->tf_load(ap, &qc->tf); /* load tf registers */
4850 ap->ops->bmdma_setup(qc); /* set up bmdma */
Albert Lee312f7da2005-09-27 17:38:03 +08004851 ap->hsm_task_state = HSM_ST_FIRST;
4852
4853 /* send cdb by polling if no cdb interrupt */
4854 if (!(qc->dev->flags & ATA_DFLAG_CDB_INTR))
Albert Lee31ce6da2006-04-03 18:31:44 +08004855 ata_port_queue_task(ap, ata_pio_task, qc, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004856 break;
4857
4858 default:
4859 WARN_ON(1);
Tejun Heo9a3d9eb2006-01-23 13:09:36 +09004860 return AC_ERR_SYSTEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004861 }
4862
4863 return 0;
4864}
4865
4866/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07004867 * ata_host_intr - Handle host interrupt for given (port, task)
4868 * @ap: Port on which interrupt arrived (possibly...)
4869 * @qc: Taskfile currently active in engine
4870 *
4871 * Handle host interrupt for given queued command. Currently,
4872 * only DMA interrupts are handled. All other commands are
4873 * handled via polling with interrupts disabled (nIEN bit).
4874 *
4875 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04004876 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004877 *
4878 * RETURNS:
4879 * One if interrupt was handled, zero if not (shared irq).
4880 */
4881
4882inline unsigned int ata_host_intr (struct ata_port *ap,
4883 struct ata_queued_cmd *qc)
4884{
Albert Lee312f7da2005-09-27 17:38:03 +08004885 u8 status, host_stat = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004886
Albert Lee312f7da2005-09-27 17:38:03 +08004887 VPRINTK("ata%u: protocol %d task_state %d\n",
4888 ap->id, qc->tf.protocol, ap->hsm_task_state);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004889
Albert Lee312f7da2005-09-27 17:38:03 +08004890 /* Check whether we are expecting interrupt in this state */
4891 switch (ap->hsm_task_state) {
4892 case HSM_ST_FIRST:
Albert Lee6912ccd2006-03-25 17:45:49 +08004893 /* Some pre-ATAPI-4 devices assert INTRQ
4894 * at this state when ready to receive CDB.
4895 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07004896
Albert Lee312f7da2005-09-27 17:38:03 +08004897 /* Check the ATA_DFLAG_CDB_INTR flag is enough here.
4898 * The flag was turned on only for atapi devices.
4899 * No need to check is_atapi_taskfile(&qc->tf) again.
4900 */
4901 if (!(qc->dev->flags & ATA_DFLAG_CDB_INTR))
Linus Torvalds1da177e2005-04-16 15:20:36 -07004902 goto idle_irq;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004903 break;
Albert Lee312f7da2005-09-27 17:38:03 +08004904 case HSM_ST_LAST:
4905 if (qc->tf.protocol == ATA_PROT_DMA ||
4906 qc->tf.protocol == ATA_PROT_ATAPI_DMA) {
4907 /* check status of DMA engine */
4908 host_stat = ap->ops->bmdma_status(ap);
4909 VPRINTK("ata%u: host_stat 0x%X\n", ap->id, host_stat);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004910
Albert Lee312f7da2005-09-27 17:38:03 +08004911 /* if it's not our irq... */
4912 if (!(host_stat & ATA_DMA_INTR))
4913 goto idle_irq;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004914
Albert Lee312f7da2005-09-27 17:38:03 +08004915 /* before we do anything else, clear DMA-Start bit */
4916 ap->ops->bmdma_stop(qc);
Albert Leea4f16612005-12-26 16:40:53 +08004917
4918 if (unlikely(host_stat & ATA_DMA_ERR)) {
4919 /* error when transfering data to/from memory */
4920 qc->err_mask |= AC_ERR_HOST_BUS;
4921 ap->hsm_task_state = HSM_ST_ERR;
4922 }
Albert Lee312f7da2005-09-27 17:38:03 +08004923 }
4924 break;
4925 case HSM_ST:
4926 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004927 default:
4928 goto idle_irq;
4929 }
4930
Albert Lee312f7da2005-09-27 17:38:03 +08004931 /* check altstatus */
4932 status = ata_altstatus(ap);
4933 if (status & ATA_BUSY)
4934 goto idle_irq;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004935
Albert Lee312f7da2005-09-27 17:38:03 +08004936 /* check main status, clearing INTRQ */
4937 status = ata_chk_status(ap);
4938 if (unlikely(status & ATA_BUSY))
4939 goto idle_irq;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004940
Albert Lee312f7da2005-09-27 17:38:03 +08004941 /* ack bmdma irq events */
4942 ap->ops->irq_clear(ap);
4943
Albert Leebb5cb292006-03-25 17:48:02 +08004944 ata_hsm_move(ap, qc, status, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004945 return 1; /* irq handled */
4946
4947idle_irq:
4948 ap->stats.idle_irq++;
4949
4950#ifdef ATA_IRQ_TRAP
4951 if ((ap->stats.idle_irq % 1000) == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07004952 ata_irq_ack(ap, 0); /* debug trap */
Tejun Heof15a1da2006-05-15 20:57:56 +09004953 ata_port_printk(ap, KERN_WARNING, "irq trap\n");
Alan Cox23cfce82006-03-21 16:06:53 +00004954 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004955 }
4956#endif
4957 return 0; /* irq not handled */
4958}
4959
4960/**
4961 * ata_interrupt - Default ATA host interrupt handler
Jeff Garzik0cba6322005-05-30 19:49:12 -04004962 * @irq: irq line (unused)
Jeff Garzikcca39742006-08-24 03:19:22 -04004963 * @dev_instance: pointer to our ata_host information structure
Linus Torvalds1da177e2005-04-16 15:20:36 -07004964 *
Jeff Garzik0cba6322005-05-30 19:49:12 -04004965 * Default interrupt handler for PCI IDE devices. Calls
4966 * ata_host_intr() for each port that is not disabled.
4967 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07004968 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04004969 * Obtains host lock during operation.
Linus Torvalds1da177e2005-04-16 15:20:36 -07004970 *
4971 * RETURNS:
Jeff Garzik0cba6322005-05-30 19:49:12 -04004972 * IRQ_NONE or IRQ_HANDLED.
Linus Torvalds1da177e2005-04-16 15:20:36 -07004973 */
4974
David Howells7d12e782006-10-05 14:55:46 +01004975irqreturn_t ata_interrupt (int irq, void *dev_instance)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004976{
Jeff Garzikcca39742006-08-24 03:19:22 -04004977 struct ata_host *host = dev_instance;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004978 unsigned int i;
4979 unsigned int handled = 0;
4980 unsigned long flags;
4981
4982 /* TODO: make _irqsave conditional on x86 PCI IDE legacy mode */
Jeff Garzikcca39742006-08-24 03:19:22 -04004983 spin_lock_irqsave(&host->lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004984
Jeff Garzikcca39742006-08-24 03:19:22 -04004985 for (i = 0; i < host->n_ports; i++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07004986 struct ata_port *ap;
4987
Jeff Garzikcca39742006-08-24 03:19:22 -04004988 ap = host->ports[i];
Tejun Heoc1389502005-08-22 14:59:24 +09004989 if (ap &&
Jeff Garzik029f5462006-04-02 10:30:40 -04004990 !(ap->flags & ATA_FLAG_DISABLED)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07004991 struct ata_queued_cmd *qc;
4992
4993 qc = ata_qc_from_tag(ap, ap->active_tag);
Albert Lee312f7da2005-09-27 17:38:03 +08004994 if (qc && (!(qc->tf.flags & ATA_TFLAG_POLLING)) &&
Albert Lee21b1ed72005-04-29 17:34:59 +08004995 (qc->flags & ATA_QCFLAG_ACTIVE))
Linus Torvalds1da177e2005-04-16 15:20:36 -07004996 handled |= ata_host_intr(ap, qc);
4997 }
4998 }
4999
Jeff Garzikcca39742006-08-24 03:19:22 -04005000 spin_unlock_irqrestore(&host->lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005001
5002 return IRQ_RETVAL(handled);
5003}
5004
Tejun Heo34bf2172006-05-15 20:57:46 +09005005/**
5006 * sata_scr_valid - test whether SCRs are accessible
5007 * @ap: ATA port to test SCR accessibility for
5008 *
5009 * Test whether SCRs are accessible for @ap.
5010 *
5011 * LOCKING:
5012 * None.
5013 *
5014 * RETURNS:
5015 * 1 if SCRs are accessible, 0 otherwise.
5016 */
5017int sata_scr_valid(struct ata_port *ap)
5018{
5019 return ap->cbl == ATA_CBL_SATA && ap->ops->scr_read;
5020}
5021
5022/**
5023 * sata_scr_read - read SCR register of the specified port
5024 * @ap: ATA port to read SCR for
5025 * @reg: SCR to read
5026 * @val: Place to store read value
5027 *
5028 * Read SCR register @reg of @ap into *@val. This function is
5029 * guaranteed to succeed if the cable type of the port is SATA
5030 * and the port implements ->scr_read.
5031 *
5032 * LOCKING:
5033 * None.
5034 *
5035 * RETURNS:
5036 * 0 on success, negative errno on failure.
5037 */
5038int sata_scr_read(struct ata_port *ap, int reg, u32 *val)
5039{
5040 if (sata_scr_valid(ap)) {
5041 *val = ap->ops->scr_read(ap, reg);
5042 return 0;
5043 }
5044 return -EOPNOTSUPP;
5045}
5046
5047/**
5048 * sata_scr_write - write SCR register of the specified port
5049 * @ap: ATA port to write SCR for
5050 * @reg: SCR to write
5051 * @val: value to write
5052 *
5053 * Write @val to SCR register @reg of @ap. This function is
5054 * guaranteed to succeed if the cable type of the port is SATA
5055 * and the port implements ->scr_read.
5056 *
5057 * LOCKING:
5058 * None.
5059 *
5060 * RETURNS:
5061 * 0 on success, negative errno on failure.
5062 */
5063int sata_scr_write(struct ata_port *ap, int reg, u32 val)
5064{
5065 if (sata_scr_valid(ap)) {
5066 ap->ops->scr_write(ap, reg, val);
5067 return 0;
5068 }
5069 return -EOPNOTSUPP;
5070}
5071
5072/**
5073 * sata_scr_write_flush - write SCR register of the specified port and flush
5074 * @ap: ATA port to write SCR for
5075 * @reg: SCR to write
5076 * @val: value to write
5077 *
5078 * This function is identical to sata_scr_write() except that this
5079 * function performs flush after writing to the register.
5080 *
5081 * LOCKING:
5082 * None.
5083 *
5084 * RETURNS:
5085 * 0 on success, negative errno on failure.
5086 */
5087int sata_scr_write_flush(struct ata_port *ap, int reg, u32 val)
5088{
5089 if (sata_scr_valid(ap)) {
5090 ap->ops->scr_write(ap, reg, val);
5091 ap->ops->scr_read(ap, reg);
5092 return 0;
5093 }
5094 return -EOPNOTSUPP;
5095}
5096
5097/**
5098 * ata_port_online - test whether the given port is online
5099 * @ap: ATA port to test
5100 *
5101 * Test whether @ap is online. Note that this function returns 0
5102 * if online status of @ap cannot be obtained, so
5103 * ata_port_online(ap) != !ata_port_offline(ap).
5104 *
5105 * LOCKING:
5106 * None.
5107 *
5108 * RETURNS:
5109 * 1 if the port online status is available and online.
5110 */
5111int ata_port_online(struct ata_port *ap)
5112{
5113 u32 sstatus;
5114
5115 if (!sata_scr_read(ap, SCR_STATUS, &sstatus) && (sstatus & 0xf) == 0x3)
5116 return 1;
5117 return 0;
5118}
5119
5120/**
5121 * ata_port_offline - test whether the given port is offline
5122 * @ap: ATA port to test
5123 *
5124 * Test whether @ap is offline. Note that this function returns
5125 * 0 if offline status of @ap cannot be obtained, so
5126 * ata_port_online(ap) != !ata_port_offline(ap).
5127 *
5128 * LOCKING:
5129 * None.
5130 *
5131 * RETURNS:
5132 * 1 if the port offline status is available and offline.
5133 */
5134int ata_port_offline(struct ata_port *ap)
5135{
5136 u32 sstatus;
5137
5138 if (!sata_scr_read(ap, SCR_STATUS, &sstatus) && (sstatus & 0xf) != 0x3)
5139 return 1;
5140 return 0;
5141}
Edward Falk0baab862005-06-02 18:17:13 -04005142
Tejun Heo77b08fb2006-06-24 20:30:19 +09005143int ata_flush_cache(struct ata_device *dev)
Jens Axboe9b847542006-01-06 09:28:07 +01005144{
Tejun Heo977e6b92006-06-24 20:30:19 +09005145 unsigned int err_mask;
Jens Axboe9b847542006-01-06 09:28:07 +01005146 u8 cmd;
5147
5148 if (!ata_try_flush_cache(dev))
5149 return 0;
5150
Tejun Heo6fc49ad2006-11-11 20:10:45 +09005151 if (dev->flags & ATA_DFLAG_FLUSH_EXT)
Jens Axboe9b847542006-01-06 09:28:07 +01005152 cmd = ATA_CMD_FLUSH_EXT;
5153 else
5154 cmd = ATA_CMD_FLUSH;
5155
Tejun Heo977e6b92006-06-24 20:30:19 +09005156 err_mask = ata_do_simple_cmd(dev, cmd);
5157 if (err_mask) {
5158 ata_dev_printk(dev, KERN_ERR, "failed to flush cache\n");
5159 return -EIO;
5160 }
5161
5162 return 0;
Jens Axboe9b847542006-01-06 09:28:07 +01005163}
5164
Jeff Garzikcca39742006-08-24 03:19:22 -04005165static int ata_host_request_pm(struct ata_host *host, pm_message_t mesg,
5166 unsigned int action, unsigned int ehi_flags,
5167 int wait)
Tejun Heo500530f2006-07-03 16:07:27 +09005168{
5169 unsigned long flags;
5170 int i, rc;
5171
Jeff Garzikcca39742006-08-24 03:19:22 -04005172 for (i = 0; i < host->n_ports; i++) {
5173 struct ata_port *ap = host->ports[i];
Tejun Heo500530f2006-07-03 16:07:27 +09005174
5175 /* Previous resume operation might still be in
5176 * progress. Wait for PM_PENDING to clear.
5177 */
5178 if (ap->pflags & ATA_PFLAG_PM_PENDING) {
5179 ata_port_wait_eh(ap);
5180 WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING);
5181 }
5182
5183 /* request PM ops to EH */
5184 spin_lock_irqsave(ap->lock, flags);
5185
5186 ap->pm_mesg = mesg;
5187 if (wait) {
5188 rc = 0;
5189 ap->pm_result = &rc;
5190 }
5191
5192 ap->pflags |= ATA_PFLAG_PM_PENDING;
5193 ap->eh_info.action |= action;
5194 ap->eh_info.flags |= ehi_flags;
5195
5196 ata_port_schedule_eh(ap);
5197
5198 spin_unlock_irqrestore(ap->lock, flags);
5199
5200 /* wait and check result */
5201 if (wait) {
5202 ata_port_wait_eh(ap);
5203 WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING);
5204 if (rc)
5205 return rc;
5206 }
5207 }
5208
5209 return 0;
5210}
5211
5212/**
Jeff Garzikcca39742006-08-24 03:19:22 -04005213 * ata_host_suspend - suspend host
5214 * @host: host to suspend
Tejun Heo500530f2006-07-03 16:07:27 +09005215 * @mesg: PM message
5216 *
Jeff Garzikcca39742006-08-24 03:19:22 -04005217 * Suspend @host. Actual operation is performed by EH. This
Tejun Heo500530f2006-07-03 16:07:27 +09005218 * function requests EH to perform PM operations and waits for EH
5219 * to finish.
5220 *
5221 * LOCKING:
5222 * Kernel thread context (may sleep).
5223 *
5224 * RETURNS:
5225 * 0 on success, -errno on failure.
5226 */
Jeff Garzikcca39742006-08-24 03:19:22 -04005227int ata_host_suspend(struct ata_host *host, pm_message_t mesg)
Tejun Heo500530f2006-07-03 16:07:27 +09005228{
5229 int i, j, rc;
5230
Jeff Garzikcca39742006-08-24 03:19:22 -04005231 rc = ata_host_request_pm(host, mesg, 0, ATA_EHI_QUIET, 1);
Tejun Heo500530f2006-07-03 16:07:27 +09005232 if (rc)
5233 goto fail;
5234
5235 /* EH is quiescent now. Fail if we have any ready device.
5236 * This happens if hotplug occurs between completion of device
5237 * suspension and here.
5238 */
Jeff Garzikcca39742006-08-24 03:19:22 -04005239 for (i = 0; i < host->n_ports; i++) {
5240 struct ata_port *ap = host->ports[i];
Tejun Heo500530f2006-07-03 16:07:27 +09005241
5242 for (j = 0; j < ATA_MAX_DEVICES; j++) {
5243 struct ata_device *dev = &ap->device[j];
5244
5245 if (ata_dev_ready(dev)) {
5246 ata_port_printk(ap, KERN_WARNING,
5247 "suspend failed, device %d "
5248 "still active\n", dev->devno);
5249 rc = -EBUSY;
5250 goto fail;
5251 }
5252 }
5253 }
5254
Jeff Garzikcca39742006-08-24 03:19:22 -04005255 host->dev->power.power_state = mesg;
Tejun Heo500530f2006-07-03 16:07:27 +09005256 return 0;
5257
5258 fail:
Jeff Garzikcca39742006-08-24 03:19:22 -04005259 ata_host_resume(host);
Tejun Heo500530f2006-07-03 16:07:27 +09005260 return rc;
5261}
5262
5263/**
Jeff Garzikcca39742006-08-24 03:19:22 -04005264 * ata_host_resume - resume host
5265 * @host: host to resume
Tejun Heo500530f2006-07-03 16:07:27 +09005266 *
Jeff Garzikcca39742006-08-24 03:19:22 -04005267 * Resume @host. Actual operation is performed by EH. This
Tejun Heo500530f2006-07-03 16:07:27 +09005268 * function requests EH to perform PM operations and returns.
5269 * Note that all resume operations are performed parallely.
5270 *
5271 * LOCKING:
5272 * Kernel thread context (may sleep).
5273 */
Jeff Garzikcca39742006-08-24 03:19:22 -04005274void ata_host_resume(struct ata_host *host)
Tejun Heo500530f2006-07-03 16:07:27 +09005275{
Jeff Garzikcca39742006-08-24 03:19:22 -04005276 ata_host_request_pm(host, PMSG_ON, ATA_EH_SOFTRESET,
5277 ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET, 0);
5278 host->dev->power.power_state = PMSG_ON;
Tejun Heo500530f2006-07-03 16:07:27 +09005279}
5280
Randy Dunlapc893a3a2006-01-28 13:15:32 -05005281/**
5282 * ata_port_start - Set port up for dma.
5283 * @ap: Port to initialize
5284 *
5285 * Called just after data structures for each port are
5286 * initialized. Allocates space for PRD table.
5287 *
5288 * May be used as the port_start() entry in ata_port_operations.
5289 *
5290 * LOCKING:
5291 * Inherited from caller.
5292 */
5293
Linus Torvalds1da177e2005-04-16 15:20:36 -07005294int ata_port_start (struct ata_port *ap)
5295{
Brian King2f1f6102006-03-23 17:30:15 -06005296 struct device *dev = ap->dev;
Jeff Garzik6037d6b2005-11-04 22:08:00 -05005297 int rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005298
5299 ap->prd = dma_alloc_coherent(dev, ATA_PRD_TBL_SZ, &ap->prd_dma, GFP_KERNEL);
5300 if (!ap->prd)
5301 return -ENOMEM;
5302
Jeff Garzik6037d6b2005-11-04 22:08:00 -05005303 rc = ata_pad_alloc(ap, dev);
5304 if (rc) {
Jeff Garzikcedc9a42005-10-05 07:13:30 -04005305 dma_free_coherent(dev, ATA_PRD_TBL_SZ, ap->prd, ap->prd_dma);
Jeff Garzik6037d6b2005-11-04 22:08:00 -05005306 return rc;
Jeff Garzikcedc9a42005-10-05 07:13:30 -04005307 }
5308
Linus Torvalds1da177e2005-04-16 15:20:36 -07005309 DPRINTK("prd alloc, virt %p, dma %llx\n", ap->prd, (unsigned long long) ap->prd_dma);
5310
5311 return 0;
5312}
5313
Edward Falk0baab862005-06-02 18:17:13 -04005314
5315/**
5316 * ata_port_stop - Undo ata_port_start()
5317 * @ap: Port to shut down
5318 *
5319 * Frees the PRD table.
5320 *
5321 * May be used as the port_stop() entry in ata_port_operations.
5322 *
5323 * LOCKING:
Randy Dunlap6f0ef4f2005-10-25 01:44:30 -04005324 * Inherited from caller.
Edward Falk0baab862005-06-02 18:17:13 -04005325 */
5326
Linus Torvalds1da177e2005-04-16 15:20:36 -07005327void ata_port_stop (struct ata_port *ap)
5328{
Brian King2f1f6102006-03-23 17:30:15 -06005329 struct device *dev = ap->dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005330
5331 dma_free_coherent(dev, ATA_PRD_TBL_SZ, ap->prd, ap->prd_dma);
Jeff Garzik6037d6b2005-11-04 22:08:00 -05005332 ata_pad_free(ap, dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005333}
5334
Jeff Garzikcca39742006-08-24 03:19:22 -04005335void ata_host_stop (struct ata_host *host)
Jeff Garzikaa8f0dc2005-05-26 21:54:27 -04005336{
Jeff Garzikcca39742006-08-24 03:19:22 -04005337 if (host->mmio_base)
5338 iounmap(host->mmio_base);
Jeff Garzikaa8f0dc2005-05-26 21:54:27 -04005339}
5340
Linus Torvalds1da177e2005-04-16 15:20:36 -07005341/**
Tejun Heo3ef3b432006-05-31 18:27:30 +09005342 * ata_dev_init - Initialize an ata_device structure
5343 * @dev: Device structure to initialize
5344 *
5345 * Initialize @dev in preparation for probing.
5346 *
5347 * LOCKING:
5348 * Inherited from caller.
5349 */
5350void ata_dev_init(struct ata_device *dev)
5351{
5352 struct ata_port *ap = dev->ap;
Tejun Heo72fa4b72006-05-31 18:27:32 +09005353 unsigned long flags;
Tejun Heo3ef3b432006-05-31 18:27:30 +09005354
Tejun Heo5a04bf42006-05-31 18:27:38 +09005355 /* SATA spd limit is bound to the first device */
5356 ap->sata_spd_limit = ap->hw_sata_spd_limit;
5357
Tejun Heo72fa4b72006-05-31 18:27:32 +09005358 /* High bits of dev->flags are used to record warm plug
5359 * requests which occur asynchronously. Synchronize using
Jeff Garzikcca39742006-08-24 03:19:22 -04005360 * host lock.
Tejun Heo72fa4b72006-05-31 18:27:32 +09005361 */
Jeff Garzikba6a1302006-06-22 23:46:10 -04005362 spin_lock_irqsave(ap->lock, flags);
Tejun Heo72fa4b72006-05-31 18:27:32 +09005363 dev->flags &= ~ATA_DFLAG_INIT_MASK;
Jeff Garzikba6a1302006-06-22 23:46:10 -04005364 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heo72fa4b72006-05-31 18:27:32 +09005365
5366 memset((void *)dev + ATA_DEVICE_CLEAR_OFFSET, 0,
5367 sizeof(*dev) - ATA_DEVICE_CLEAR_OFFSET);
Tejun Heo3ef3b432006-05-31 18:27:30 +09005368 dev->pio_mask = UINT_MAX;
5369 dev->mwdma_mask = UINT_MAX;
5370 dev->udma_mask = UINT_MAX;
5371}
5372
5373/**
Brian King155a8a92006-08-07 14:27:17 -05005374 * ata_port_init - Initialize an ata_port structure
Linus Torvalds1da177e2005-04-16 15:20:36 -07005375 * @ap: Structure to initialize
Jeff Garzikcca39742006-08-24 03:19:22 -04005376 * @host: Collection of hosts to which @ap belongs
Linus Torvalds1da177e2005-04-16 15:20:36 -07005377 * @ent: Probe information provided by low-level driver
5378 * @port_no: Port number associated with this ata_port
5379 *
Brian King155a8a92006-08-07 14:27:17 -05005380 * Initialize a new ata_port structure.
Jeff Garzik0cba6322005-05-30 19:49:12 -04005381 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07005382 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04005383 * Inherited from caller.
Linus Torvalds1da177e2005-04-16 15:20:36 -07005384 */
Jeff Garzikcca39742006-08-24 03:19:22 -04005385void ata_port_init(struct ata_port *ap, struct ata_host *host,
Brian King155a8a92006-08-07 14:27:17 -05005386 const struct ata_probe_ent *ent, unsigned int port_no)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005387{
5388 unsigned int i;
5389
Jeff Garzikcca39742006-08-24 03:19:22 -04005390 ap->lock = &host->lock;
Tejun Heo198e0fe2006-04-02 18:51:52 +09005391 ap->flags = ATA_FLAG_DISABLED;
Brian King155a8a92006-08-07 14:27:17 -05005392 ap->id = ata_unique_id++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005393 ap->ctl = ATA_DEVCTL_OBS;
Jeff Garzikcca39742006-08-24 03:19:22 -04005394 ap->host = host;
Brian King2f1f6102006-03-23 17:30:15 -06005395 ap->dev = ent->dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005396 ap->port_no = port_no;
Tejun Heofea63e32006-09-16 03:04:15 +09005397 if (port_no == 1 && ent->pinfo2) {
5398 ap->pio_mask = ent->pinfo2->pio_mask;
5399 ap->mwdma_mask = ent->pinfo2->mwdma_mask;
5400 ap->udma_mask = ent->pinfo2->udma_mask;
5401 ap->flags |= ent->pinfo2->flags;
5402 ap->ops = ent->pinfo2->port_ops;
5403 } else {
5404 ap->pio_mask = ent->pio_mask;
5405 ap->mwdma_mask = ent->mwdma_mask;
5406 ap->udma_mask = ent->udma_mask;
5407 ap->flags |= ent->port_flags;
5408 ap->ops = ent->port_ops;
5409 }
Tejun Heo5a04bf42006-05-31 18:27:38 +09005410 ap->hw_sata_spd_limit = UINT_MAX;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005411 ap->active_tag = ATA_TAG_POISON;
5412 ap->last_ctl = 0xFF;
Borislav Petkovbd5d8252006-06-11 23:17:01 -04005413
5414#if defined(ATA_VERBOSE_DEBUG)
5415 /* turn on all debugging levels */
5416 ap->msg_enable = 0x00FF;
5417#elif defined(ATA_DEBUG)
5418 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 +09005419#else
Borislav Petkov0dd4b212006-06-23 02:29:08 -04005420 ap->msg_enable = ATA_MSG_DRV | ATA_MSG_ERR | ATA_MSG_WARN;
Borislav Petkovbd5d8252006-06-11 23:17:01 -04005421#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07005422
Tejun Heo86e45b62006-03-05 15:29:09 +09005423 INIT_WORK(&ap->port_task, NULL, NULL);
Tejun Heo580b21022006-05-31 18:28:05 +09005424 INIT_WORK(&ap->hotplug_task, ata_scsi_hotplug, ap);
zhao, forrest3057ac32006-06-12 12:01:34 +08005425 INIT_WORK(&ap->scsi_rescan_task, ata_scsi_dev_rescan, ap);
Tejun Heoa72ec4c2006-01-23 13:09:37 +09005426 INIT_LIST_HEAD(&ap->eh_done_q);
Tejun Heoc6cf9e92006-05-31 18:27:27 +09005427 init_waitqueue_head(&ap->eh_wait_q);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005428
Tejun Heo838df622006-05-15 20:57:44 +09005429 /* set cable type */
5430 ap->cbl = ATA_CBL_NONE;
5431 if (ap->flags & ATA_FLAG_SATA)
5432 ap->cbl = ATA_CBL_SATA;
5433
Tejun Heoacf356b2006-03-24 14:07:50 +09005434 for (i = 0; i < ATA_MAX_DEVICES; i++) {
5435 struct ata_device *dev = &ap->device[i];
Tejun Heo38d87232006-05-15 20:57:51 +09005436 dev->ap = ap;
Tejun Heo72fa4b72006-05-31 18:27:32 +09005437 dev->devno = i;
Tejun Heo3ef3b432006-05-31 18:27:30 +09005438 ata_dev_init(dev);
Tejun Heoacf356b2006-03-24 14:07:50 +09005439 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07005440
5441#ifdef ATA_IRQ_TRAP
5442 ap->stats.unhandled_irq = 1;
5443 ap->stats.idle_irq = 1;
5444#endif
5445
5446 memcpy(&ap->ioaddr, &ent->port[port_no], sizeof(struct ata_ioports));
5447}
5448
5449/**
Tejun Heo4608c162006-08-10 16:59:01 +09005450 * ata_port_init_shost - Initialize SCSI host associated with ATA port
5451 * @ap: ATA port to initialize SCSI host for
5452 * @shost: SCSI host associated with @ap
Brian King155a8a92006-08-07 14:27:17 -05005453 *
Tejun Heo4608c162006-08-10 16:59:01 +09005454 * Initialize SCSI host @shost associated with ATA port @ap.
Brian King155a8a92006-08-07 14:27:17 -05005455 *
5456 * LOCKING:
5457 * Inherited from caller.
5458 */
Tejun Heo4608c162006-08-10 16:59:01 +09005459static void ata_port_init_shost(struct ata_port *ap, struct Scsi_Host *shost)
Brian King155a8a92006-08-07 14:27:17 -05005460{
Jeff Garzikcca39742006-08-24 03:19:22 -04005461 ap->scsi_host = shost;
Brian King155a8a92006-08-07 14:27:17 -05005462
Tejun Heo4608c162006-08-10 16:59:01 +09005463 shost->unique_id = ap->id;
5464 shost->max_id = 16;
5465 shost->max_lun = 1;
5466 shost->max_channel = 1;
5467 shost->max_cmd_len = 12;
Brian King155a8a92006-08-07 14:27:17 -05005468}
5469
5470/**
Jeff Garzik996139f2006-08-10 16:59:03 +09005471 * ata_port_add - Attach low-level ATA driver to system
Linus Torvalds1da177e2005-04-16 15:20:36 -07005472 * @ent: Information provided by low-level driver
Jeff Garzikcca39742006-08-24 03:19:22 -04005473 * @host: Collections of ports to which we add
Linus Torvalds1da177e2005-04-16 15:20:36 -07005474 * @port_no: Port number associated with this host
5475 *
Jeff Garzik0cba6322005-05-30 19:49:12 -04005476 * Attach low-level ATA driver to system.
5477 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07005478 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04005479 * PCI/etc. bus probe sem.
Linus Torvalds1da177e2005-04-16 15:20:36 -07005480 *
5481 * RETURNS:
Jeff Garzik0cba6322005-05-30 19:49:12 -04005482 * New ata_port on success, for NULL on error.
Linus Torvalds1da177e2005-04-16 15:20:36 -07005483 */
Jeff Garzik996139f2006-08-10 16:59:03 +09005484static struct ata_port * ata_port_add(const struct ata_probe_ent *ent,
Jeff Garzikcca39742006-08-24 03:19:22 -04005485 struct ata_host *host,
Linus Torvalds1da177e2005-04-16 15:20:36 -07005486 unsigned int port_no)
5487{
Jeff Garzik996139f2006-08-10 16:59:03 +09005488 struct Scsi_Host *shost;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005489 struct ata_port *ap;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005490
5491 DPRINTK("ENTER\n");
Tejun Heoaec5c3c2006-03-25 01:33:34 +09005492
Tejun Heo52783c52006-05-31 18:28:22 +09005493 if (!ent->port_ops->error_handler &&
Jeff Garzikcca39742006-08-24 03:19:22 -04005494 !(ent->port_flags & (ATA_FLAG_SATA_RESET | ATA_FLAG_SRST))) {
Tejun Heoaec5c3c2006-03-25 01:33:34 +09005495 printk(KERN_ERR "ata%u: no reset mechanism available\n",
5496 port_no);
5497 return NULL;
5498 }
5499
Jeff Garzik996139f2006-08-10 16:59:03 +09005500 shost = scsi_host_alloc(ent->sht, sizeof(struct ata_port));
5501 if (!shost)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005502 return NULL;
5503
Jeff Garzik996139f2006-08-10 16:59:03 +09005504 shost->transportt = &ata_scsi_transport_template;
Tejun Heo30afc842006-03-18 18:40:14 +09005505
Jeff Garzik996139f2006-08-10 16:59:03 +09005506 ap = ata_shost_to_port(shost);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005507
Jeff Garzikcca39742006-08-24 03:19:22 -04005508 ata_port_init(ap, host, ent, port_no);
Jeff Garzik996139f2006-08-10 16:59:03 +09005509 ata_port_init_shost(ap, shost);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005510
Linus Torvalds1da177e2005-04-16 15:20:36 -07005511 return ap;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005512}
5513
5514/**
Jeff Garzikcca39742006-08-24 03:19:22 -04005515 * ata_sas_host_init - Initialize a host struct
5516 * @host: host to initialize
5517 * @dev: device host is attached to
5518 * @flags: host flags
5519 * @ops: port_ops
Brian Kingb03732f2006-08-07 14:27:10 -05005520 *
5521 * LOCKING:
5522 * PCI/etc. bus probe sem.
5523 *
5524 */
5525
Jeff Garzikcca39742006-08-24 03:19:22 -04005526void ata_host_init(struct ata_host *host, struct device *dev,
5527 unsigned long flags, const struct ata_port_operations *ops)
Brian Kingb03732f2006-08-07 14:27:10 -05005528{
Jeff Garzikcca39742006-08-24 03:19:22 -04005529 spin_lock_init(&host->lock);
5530 host->dev = dev;
5531 host->flags = flags;
5532 host->ops = ops;
Brian Kingb03732f2006-08-07 14:27:10 -05005533}
5534
5535/**
Jeff Garzik0cba6322005-05-30 19:49:12 -04005536 * ata_device_add - Register hardware device with ATA and SCSI layers
5537 * @ent: Probe information describing hardware device to be registered
5538 *
5539 * This function processes the information provided in the probe
5540 * information struct @ent, allocates the necessary ATA and SCSI
5541 * host information structures, initializes them, and registers
5542 * everything with requisite kernel subsystems.
5543 *
5544 * This function requests irqs, probes the ATA bus, and probes
5545 * the SCSI bus.
Linus Torvalds1da177e2005-04-16 15:20:36 -07005546 *
5547 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04005548 * PCI/etc. bus probe sem.
Linus Torvalds1da177e2005-04-16 15:20:36 -07005549 *
5550 * RETURNS:
Jeff Garzik0cba6322005-05-30 19:49:12 -04005551 * Number of ports registered. Zero on error (no ports registered).
Linus Torvalds1da177e2005-04-16 15:20:36 -07005552 */
Jeff Garzik057ace52005-10-22 14:27:05 -04005553int ata_device_add(const struct ata_probe_ent *ent)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005554{
Jeff Garzik6d0500d2006-08-10 16:59:05 +09005555 unsigned int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005556 struct device *dev = ent->dev;
Jeff Garzikcca39742006-08-24 03:19:22 -04005557 struct ata_host *host;
Jeff Garzik39b07ce2006-06-11 23:59:44 -04005558 int rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005559
5560 DPRINTK("ENTER\n");
Alan Cox02f076a2006-09-26 17:35:32 +01005561
5562 if (ent->irq == 0) {
5563 dev_printk(KERN_ERR, dev, "is not available: No interrupt assigned.\n");
5564 return 0;
5565 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07005566 /* alloc a container for our list of ATA ports (buses) */
Jeff Garzikcca39742006-08-24 03:19:22 -04005567 host = kzalloc(sizeof(struct ata_host) +
5568 (ent->n_ports * sizeof(void *)), GFP_KERNEL);
5569 if (!host)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005570 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005571
Jeff Garzikcca39742006-08-24 03:19:22 -04005572 ata_host_init(host, dev, ent->_host_flags, ent->port_ops);
5573 host->n_ports = ent->n_ports;
5574 host->irq = ent->irq;
5575 host->irq2 = ent->irq2;
5576 host->mmio_base = ent->mmio_base;
5577 host->private_data = ent->private_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005578
5579 /* register each port bound to this device */
Jeff Garzikcca39742006-08-24 03:19:22 -04005580 for (i = 0; i < host->n_ports; i++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07005581 struct ata_port *ap;
5582 unsigned long xfer_mode_mask;
Alan Cox2ec7df02006-08-10 16:59:10 +09005583 int irq_line = ent->irq;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005584
Jeff Garzikcca39742006-08-24 03:19:22 -04005585 ap = ata_port_add(ent, host, i);
Dave Jonesc38778c2006-09-26 23:52:50 -07005586 host->ports[i] = ap;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005587 if (!ap)
5588 goto err_out;
5589
Tejun Heodd5b06c2006-08-10 16:59:12 +09005590 /* dummy? */
5591 if (ent->dummy_port_mask & (1 << i)) {
5592 ata_port_printk(ap, KERN_INFO, "DUMMY\n");
5593 ap->ops = &ata_dummy_port_ops;
5594 continue;
5595 }
5596
5597 /* start port */
5598 rc = ap->ops->port_start(ap);
5599 if (rc) {
Jeff Garzikcca39742006-08-24 03:19:22 -04005600 host->ports[i] = NULL;
5601 scsi_host_put(ap->scsi_host);
Tejun Heodd5b06c2006-08-10 16:59:12 +09005602 goto err_out;
5603 }
5604
Alan Cox2ec7df02006-08-10 16:59:10 +09005605 /* Report the secondary IRQ for second channel legacy */
5606 if (i == 1 && ent->irq2)
5607 irq_line = ent->irq2;
5608
Linus Torvalds1da177e2005-04-16 15:20:36 -07005609 xfer_mode_mask =(ap->udma_mask << ATA_SHIFT_UDMA) |
5610 (ap->mwdma_mask << ATA_SHIFT_MWDMA) |
5611 (ap->pio_mask << ATA_SHIFT_PIO);
5612
5613 /* print per-port info to dmesg */
Tejun Heof15a1da2006-05-15 20:57:56 +09005614 ata_port_printk(ap, KERN_INFO, "%cATA max %s cmd 0x%lX "
Alan Cox2ec7df02006-08-10 16:59:10 +09005615 "ctl 0x%lX bmdma 0x%lX irq %d\n",
Tejun Heof15a1da2006-05-15 20:57:56 +09005616 ap->flags & ATA_FLAG_SATA ? 'S' : 'P',
5617 ata_mode_string(xfer_mode_mask),
5618 ap->ioaddr.cmd_addr,
5619 ap->ioaddr.ctl_addr,
5620 ap->ioaddr.bmdma_addr,
Alan Cox2ec7df02006-08-10 16:59:10 +09005621 irq_line);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005622
5623 ata_chk_status(ap);
Jeff Garzikcca39742006-08-24 03:19:22 -04005624 host->ops->irq_clear(ap);
Tejun Heoe3180492006-05-15 20:58:09 +09005625 ata_eh_freeze_port(ap); /* freeze port before requesting IRQ */
Linus Torvalds1da177e2005-04-16 15:20:36 -07005626 }
5627
Alan Cox2ec7df02006-08-10 16:59:10 +09005628 /* obtain irq, that may be shared between channels */
Jeff Garzik39b07ce2006-06-11 23:59:44 -04005629 rc = request_irq(ent->irq, ent->port_ops->irq_handler, ent->irq_flags,
Jeff Garzikcca39742006-08-24 03:19:22 -04005630 DRV_NAME, host);
Jeff Garzik39b07ce2006-06-11 23:59:44 -04005631 if (rc) {
5632 dev_printk(KERN_ERR, dev, "irq %lu request failed: %d\n",
5633 ent->irq, rc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005634 goto err_out;
Jeff Garzik39b07ce2006-06-11 23:59:44 -04005635 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07005636
Alan Cox2ec7df02006-08-10 16:59:10 +09005637 /* do we have a second IRQ for the other channel, eg legacy mode */
5638 if (ent->irq2) {
5639 /* We will get weird core code crashes later if this is true
5640 so trap it now */
5641 BUG_ON(ent->irq == ent->irq2);
5642
5643 rc = request_irq(ent->irq2, ent->port_ops->irq_handler, ent->irq_flags,
Jeff Garzikcca39742006-08-24 03:19:22 -04005644 DRV_NAME, host);
Alan Cox2ec7df02006-08-10 16:59:10 +09005645 if (rc) {
5646 dev_printk(KERN_ERR, dev, "irq %lu request failed: %d\n",
5647 ent->irq2, rc);
5648 goto err_out_free_irq;
5649 }
5650 }
5651
Linus Torvalds1da177e2005-04-16 15:20:36 -07005652 /* perform each probe synchronously */
5653 DPRINTK("probe begin\n");
Jeff Garzikcca39742006-08-24 03:19:22 -04005654 for (i = 0; i < host->n_ports; i++) {
5655 struct ata_port *ap = host->ports[i];
Tejun Heo5a04bf42006-05-31 18:27:38 +09005656 u32 scontrol;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005657 int rc;
5658
Tejun Heo5a04bf42006-05-31 18:27:38 +09005659 /* init sata_spd_limit to the current value */
5660 if (sata_scr_read(ap, SCR_CONTROL, &scontrol) == 0) {
5661 int spd = (scontrol >> 4) & 0xf;
5662 ap->hw_sata_spd_limit &= (1 << spd) - 1;
5663 }
5664 ap->sata_spd_limit = ap->hw_sata_spd_limit;
5665
Jeff Garzikcca39742006-08-24 03:19:22 -04005666 rc = scsi_add_host(ap->scsi_host, dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005667 if (rc) {
Tejun Heof15a1da2006-05-15 20:57:56 +09005668 ata_port_printk(ap, KERN_ERR, "scsi_add_host failed\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07005669 /* FIXME: do something useful here */
5670 /* FIXME: handle unconditional calls to
5671 * scsi_scan_host and ata_host_remove, below,
5672 * at the very least
5673 */
5674 }
Tejun Heo3e706392006-05-31 18:28:11 +09005675
Tejun Heo52783c52006-05-31 18:28:22 +09005676 if (ap->ops->error_handler) {
Tejun Heo1cdaf532006-07-03 16:07:26 +09005677 struct ata_eh_info *ehi = &ap->eh_info;
Tejun Heo3e706392006-05-31 18:28:11 +09005678 unsigned long flags;
5679
5680 ata_port_probe(ap);
5681
5682 /* kick EH for boot probing */
Jeff Garzikba6a1302006-06-22 23:46:10 -04005683 spin_lock_irqsave(ap->lock, flags);
Tejun Heo3e706392006-05-31 18:28:11 +09005684
Tejun Heo1cdaf532006-07-03 16:07:26 +09005685 ehi->probe_mask = (1 << ATA_MAX_DEVICES) - 1;
5686 ehi->action |= ATA_EH_SOFTRESET;
5687 ehi->flags |= ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET;
Tejun Heo3e706392006-05-31 18:28:11 +09005688
Tejun Heob51e9e52006-06-29 01:29:30 +09005689 ap->pflags |= ATA_PFLAG_LOADING;
Tejun Heo3e706392006-05-31 18:28:11 +09005690 ata_port_schedule_eh(ap);
5691
Jeff Garzikba6a1302006-06-22 23:46:10 -04005692 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heo3e706392006-05-31 18:28:11 +09005693
5694 /* wait for EH to finish */
5695 ata_port_wait_eh(ap);
5696 } else {
5697 DPRINTK("ata%u: bus probe begin\n", ap->id);
5698 rc = ata_bus_probe(ap);
5699 DPRINTK("ata%u: bus probe end\n", ap->id);
5700
5701 if (rc) {
5702 /* FIXME: do something useful here?
5703 * Current libata behavior will
5704 * tear down everything when
5705 * the module is removed
5706 * or the h/w is unplugged.
5707 */
5708 }
5709 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07005710 }
5711
5712 /* probes are done, now scan each port's disk(s) */
Randy Dunlapc893a3a2006-01-28 13:15:32 -05005713 DPRINTK("host probe begin\n");
Jeff Garzikcca39742006-08-24 03:19:22 -04005714 for (i = 0; i < host->n_ports; i++) {
5715 struct ata_port *ap = host->ports[i];
Linus Torvalds1da177e2005-04-16 15:20:36 -07005716
Jeff Garzik644dd0c2005-10-03 15:55:19 -04005717 ata_scsi_scan_host(ap);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005718 }
5719
Jeff Garzikcca39742006-08-24 03:19:22 -04005720 dev_set_drvdata(dev, host);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005721
5722 VPRINTK("EXIT, returning %u\n", ent->n_ports);
5723 return ent->n_ports; /* success */
5724
Alan Cox2ec7df02006-08-10 16:59:10 +09005725err_out_free_irq:
Jeff Garzikcca39742006-08-24 03:19:22 -04005726 free_irq(ent->irq, host);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005727err_out:
Jeff Garzikcca39742006-08-24 03:19:22 -04005728 for (i = 0; i < host->n_ports; i++) {
5729 struct ata_port *ap = host->ports[i];
Tejun Heo77f3f872006-08-05 03:59:19 +09005730 if (ap) {
5731 ap->ops->port_stop(ap);
Jeff Garzikcca39742006-08-24 03:19:22 -04005732 scsi_host_put(ap->scsi_host);
Tejun Heo77f3f872006-08-05 03:59:19 +09005733 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07005734 }
Jeff Garzik6d0500d2006-08-10 16:59:05 +09005735
Jeff Garzikcca39742006-08-24 03:19:22 -04005736 kfree(host);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005737 VPRINTK("EXIT, returning 0\n");
5738 return 0;
5739}
5740
5741/**
Tejun Heo720ba122006-05-31 18:28:13 +09005742 * ata_port_detach - Detach ATA port in prepration of device removal
5743 * @ap: ATA port to be detached
5744 *
5745 * Detach all ATA devices and the associated SCSI devices of @ap;
5746 * then, remove the associated SCSI host. @ap is guaranteed to
5747 * be quiescent on return from this function.
5748 *
5749 * LOCKING:
5750 * Kernel thread context (may sleep).
5751 */
5752void ata_port_detach(struct ata_port *ap)
5753{
5754 unsigned long flags;
5755 int i;
5756
5757 if (!ap->ops->error_handler)
Tejun Heoc3cf30a2006-08-05 03:59:11 +09005758 goto skip_eh;
Tejun Heo720ba122006-05-31 18:28:13 +09005759
5760 /* tell EH we're leaving & flush EH */
Jeff Garzikba6a1302006-06-22 23:46:10 -04005761 spin_lock_irqsave(ap->lock, flags);
Tejun Heob51e9e52006-06-29 01:29:30 +09005762 ap->pflags |= ATA_PFLAG_UNLOADING;
Jeff Garzikba6a1302006-06-22 23:46:10 -04005763 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heo720ba122006-05-31 18:28:13 +09005764
5765 ata_port_wait_eh(ap);
5766
5767 /* EH is now guaranteed to see UNLOADING, so no new device
5768 * will be attached. Disable all existing devices.
5769 */
Jeff Garzikba6a1302006-06-22 23:46:10 -04005770 spin_lock_irqsave(ap->lock, flags);
Tejun Heo720ba122006-05-31 18:28:13 +09005771
5772 for (i = 0; i < ATA_MAX_DEVICES; i++)
5773 ata_dev_disable(&ap->device[i]);
5774
Jeff Garzikba6a1302006-06-22 23:46:10 -04005775 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heo720ba122006-05-31 18:28:13 +09005776
5777 /* Final freeze & EH. All in-flight commands are aborted. EH
5778 * will be skipped and retrials will be terminated with bad
5779 * target.
5780 */
Jeff Garzikba6a1302006-06-22 23:46:10 -04005781 spin_lock_irqsave(ap->lock, flags);
Tejun Heo720ba122006-05-31 18:28:13 +09005782 ata_port_freeze(ap); /* won't be thawed */
Jeff Garzikba6a1302006-06-22 23:46:10 -04005783 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heo720ba122006-05-31 18:28:13 +09005784
5785 ata_port_wait_eh(ap);
5786
5787 /* Flush hotplug task. The sequence is similar to
5788 * ata_port_flush_task().
5789 */
5790 flush_workqueue(ata_aux_wq);
5791 cancel_delayed_work(&ap->hotplug_task);
5792 flush_workqueue(ata_aux_wq);
5793
Tejun Heoc3cf30a2006-08-05 03:59:11 +09005794 skip_eh:
Tejun Heo720ba122006-05-31 18:28:13 +09005795 /* remove the associated SCSI host */
Jeff Garzikcca39742006-08-24 03:19:22 -04005796 scsi_remove_host(ap->scsi_host);
Tejun Heo720ba122006-05-31 18:28:13 +09005797}
5798
5799/**
Jeff Garzikcca39742006-08-24 03:19:22 -04005800 * ata_host_remove - PCI layer callback for device removal
5801 * @host: ATA host set that was removed
Alan Cox17b14452005-09-15 15:44:00 +01005802 *
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05005803 * Unregister all objects associated with this host set. Free those
Alan Cox17b14452005-09-15 15:44:00 +01005804 * objects.
5805 *
5806 * LOCKING:
5807 * Inherited from calling layer (may sleep).
5808 */
5809
Jeff Garzikcca39742006-08-24 03:19:22 -04005810void ata_host_remove(struct ata_host *host)
Alan Cox17b14452005-09-15 15:44:00 +01005811{
Alan Cox17b14452005-09-15 15:44:00 +01005812 unsigned int i;
5813
Jeff Garzikcca39742006-08-24 03:19:22 -04005814 for (i = 0; i < host->n_ports; i++)
5815 ata_port_detach(host->ports[i]);
Alan Cox17b14452005-09-15 15:44:00 +01005816
Jeff Garzikcca39742006-08-24 03:19:22 -04005817 free_irq(host->irq, host);
5818 if (host->irq2)
5819 free_irq(host->irq2, host);
Alan Cox17b14452005-09-15 15:44:00 +01005820
Jeff Garzikcca39742006-08-24 03:19:22 -04005821 for (i = 0; i < host->n_ports; i++) {
5822 struct ata_port *ap = host->ports[i];
Alan Cox17b14452005-09-15 15:44:00 +01005823
Jeff Garzikcca39742006-08-24 03:19:22 -04005824 ata_scsi_release(ap->scsi_host);
Alan Cox17b14452005-09-15 15:44:00 +01005825
5826 if ((ap->flags & ATA_FLAG_NO_LEGACY) == 0) {
5827 struct ata_ioports *ioaddr = &ap->ioaddr;
5828
Alan Cox2ec7df02006-08-10 16:59:10 +09005829 /* FIXME: Add -ac IDE pci mods to remove these special cases */
5830 if (ioaddr->cmd_addr == ATA_PRIMARY_CMD)
5831 release_region(ATA_PRIMARY_CMD, 8);
5832 else if (ioaddr->cmd_addr == ATA_SECONDARY_CMD)
5833 release_region(ATA_SECONDARY_CMD, 8);
Alan Cox17b14452005-09-15 15:44:00 +01005834 }
5835
Jeff Garzikcca39742006-08-24 03:19:22 -04005836 scsi_host_put(ap->scsi_host);
Alan Cox17b14452005-09-15 15:44:00 +01005837 }
5838
Jeff Garzikcca39742006-08-24 03:19:22 -04005839 if (host->ops->host_stop)
5840 host->ops->host_stop(host);
Alan Cox17b14452005-09-15 15:44:00 +01005841
Jeff Garzikcca39742006-08-24 03:19:22 -04005842 kfree(host);
Alan Cox17b14452005-09-15 15:44:00 +01005843}
5844
5845/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07005846 * ata_scsi_release - SCSI layer callback hook for host unload
Jeff Garzik4f931372006-09-29 05:07:25 -04005847 * @shost: libata host to be unloaded
Linus Torvalds1da177e2005-04-16 15:20:36 -07005848 *
5849 * Performs all duties necessary to shut down a libata port...
5850 * Kill port kthread, disable port, and release resources.
5851 *
5852 * LOCKING:
5853 * Inherited from SCSI layer.
5854 *
5855 * RETURNS:
5856 * One.
5857 */
5858
Jeff Garzikcca39742006-08-24 03:19:22 -04005859int ata_scsi_release(struct Scsi_Host *shost)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005860{
Jeff Garzikcca39742006-08-24 03:19:22 -04005861 struct ata_port *ap = ata_shost_to_port(shost);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005862
5863 DPRINTK("ENTER\n");
5864
5865 ap->ops->port_disable(ap);
Jeff Garzik6543bc02006-08-05 03:59:17 +09005866 ap->ops->port_stop(ap);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005867
5868 DPRINTK("EXIT\n");
5869 return 1;
5870}
5871
Brian Kingf6d950e2006-08-07 14:27:24 -05005872struct ata_probe_ent *
5873ata_probe_ent_alloc(struct device *dev, const struct ata_port_info *port)
5874{
5875 struct ata_probe_ent *probe_ent;
5876
5877 probe_ent = kzalloc(sizeof(*probe_ent), GFP_KERNEL);
5878 if (!probe_ent) {
5879 printk(KERN_ERR DRV_NAME "(%s): out of memory\n",
5880 kobject_name(&(dev->kobj)));
5881 return NULL;
5882 }
5883
5884 INIT_LIST_HEAD(&probe_ent->node);
5885 probe_ent->dev = dev;
5886
5887 probe_ent->sht = port->sht;
Jeff Garzikcca39742006-08-24 03:19:22 -04005888 probe_ent->port_flags = port->flags;
Brian Kingf6d950e2006-08-07 14:27:24 -05005889 probe_ent->pio_mask = port->pio_mask;
5890 probe_ent->mwdma_mask = port->mwdma_mask;
5891 probe_ent->udma_mask = port->udma_mask;
5892 probe_ent->port_ops = port->port_ops;
Jeff Garzikd639ca92006-09-28 03:48:18 -04005893 probe_ent->private_data = port->private_data;
Brian Kingf6d950e2006-08-07 14:27:24 -05005894
5895 return probe_ent;
5896}
5897
Linus Torvalds1da177e2005-04-16 15:20:36 -07005898/**
5899 * ata_std_ports - initialize ioaddr with standard port offsets.
5900 * @ioaddr: IO address structure to be initialized
Edward Falk0baab862005-06-02 18:17:13 -04005901 *
5902 * Utility function which initializes data_addr, error_addr,
5903 * feature_addr, nsect_addr, lbal_addr, lbam_addr, lbah_addr,
5904 * device_addr, status_addr, and command_addr to standard offsets
5905 * relative to cmd_addr.
5906 *
5907 * Does not set ctl_addr, altstatus_addr, bmdma_addr, or scr_addr.
Linus Torvalds1da177e2005-04-16 15:20:36 -07005908 */
Edward Falk0baab862005-06-02 18:17:13 -04005909
Linus Torvalds1da177e2005-04-16 15:20:36 -07005910void ata_std_ports(struct ata_ioports *ioaddr)
5911{
5912 ioaddr->data_addr = ioaddr->cmd_addr + ATA_REG_DATA;
5913 ioaddr->error_addr = ioaddr->cmd_addr + ATA_REG_ERR;
5914 ioaddr->feature_addr = ioaddr->cmd_addr + ATA_REG_FEATURE;
5915 ioaddr->nsect_addr = ioaddr->cmd_addr + ATA_REG_NSECT;
5916 ioaddr->lbal_addr = ioaddr->cmd_addr + ATA_REG_LBAL;
5917 ioaddr->lbam_addr = ioaddr->cmd_addr + ATA_REG_LBAM;
5918 ioaddr->lbah_addr = ioaddr->cmd_addr + ATA_REG_LBAH;
5919 ioaddr->device_addr = ioaddr->cmd_addr + ATA_REG_DEVICE;
5920 ioaddr->status_addr = ioaddr->cmd_addr + ATA_REG_STATUS;
5921 ioaddr->command_addr = ioaddr->cmd_addr + ATA_REG_CMD;
5922}
5923
Edward Falk0baab862005-06-02 18:17:13 -04005924
Jeff Garzik374b1872005-08-30 05:42:52 -04005925#ifdef CONFIG_PCI
5926
Jeff Garzikcca39742006-08-24 03:19:22 -04005927void ata_pci_host_stop (struct ata_host *host)
Jeff Garzik374b1872005-08-30 05:42:52 -04005928{
Jeff Garzikcca39742006-08-24 03:19:22 -04005929 struct pci_dev *pdev = to_pci_dev(host->dev);
Jeff Garzik374b1872005-08-30 05:42:52 -04005930
Jeff Garzikcca39742006-08-24 03:19:22 -04005931 pci_iounmap(pdev, host->mmio_base);
Jeff Garzik374b1872005-08-30 05:42:52 -04005932}
5933
Edward Falk0baab862005-06-02 18:17:13 -04005934/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07005935 * ata_pci_remove_one - PCI layer callback for device removal
5936 * @pdev: PCI device that was removed
5937 *
5938 * PCI layer indicates to libata via this hook that
Randy Dunlap6f0ef4f2005-10-25 01:44:30 -04005939 * hot-unplug or module unload event has occurred.
Linus Torvalds1da177e2005-04-16 15:20:36 -07005940 * Handle this by unregistering all objects associated
5941 * with this PCI device. Free those objects. Then finally
5942 * release PCI resources and disable device.
5943 *
5944 * LOCKING:
5945 * Inherited from PCI layer (may sleep).
5946 */
5947
5948void ata_pci_remove_one (struct pci_dev *pdev)
5949{
5950 struct device *dev = pci_dev_to_dev(pdev);
Jeff Garzikcca39742006-08-24 03:19:22 -04005951 struct ata_host *host = dev_get_drvdata(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005952
Jeff Garzikcca39742006-08-24 03:19:22 -04005953 ata_host_remove(host);
Tejun Heof0eb62b2006-06-12 23:05:38 +09005954
Linus Torvalds1da177e2005-04-16 15:20:36 -07005955 pci_release_regions(pdev);
5956 pci_disable_device(pdev);
5957 dev_set_drvdata(dev, NULL);
5958}
5959
5960/* move to PCI subsystem */
Jeff Garzik057ace52005-10-22 14:27:05 -04005961int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005962{
5963 unsigned long tmp = 0;
5964
5965 switch (bits->width) {
5966 case 1: {
5967 u8 tmp8 = 0;
5968 pci_read_config_byte(pdev, bits->reg, &tmp8);
5969 tmp = tmp8;
5970 break;
5971 }
5972 case 2: {
5973 u16 tmp16 = 0;
5974 pci_read_config_word(pdev, bits->reg, &tmp16);
5975 tmp = tmp16;
5976 break;
5977 }
5978 case 4: {
5979 u32 tmp32 = 0;
5980 pci_read_config_dword(pdev, bits->reg, &tmp32);
5981 tmp = tmp32;
5982 break;
5983 }
5984
5985 default:
5986 return -EINVAL;
5987 }
5988
5989 tmp &= bits->mask;
5990
5991 return (tmp == bits->val) ? 1 : 0;
5992}
Jens Axboe9b847542006-01-06 09:28:07 +01005993
Tejun Heo3c5100c2006-07-26 16:58:33 +09005994void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg)
Jens Axboe9b847542006-01-06 09:28:07 +01005995{
5996 pci_save_state(pdev);
Tejun Heo500530f2006-07-03 16:07:27 +09005997
Tejun Heo3c5100c2006-07-26 16:58:33 +09005998 if (mesg.event == PM_EVENT_SUSPEND) {
Tejun Heo500530f2006-07-03 16:07:27 +09005999 pci_disable_device(pdev);
6000 pci_set_power_state(pdev, PCI_D3hot);
6001 }
Jens Axboe9b847542006-01-06 09:28:07 +01006002}
6003
Tejun Heo500530f2006-07-03 16:07:27 +09006004void ata_pci_device_do_resume(struct pci_dev *pdev)
Jens Axboe9b847542006-01-06 09:28:07 +01006005{
6006 pci_set_power_state(pdev, PCI_D0);
6007 pci_restore_state(pdev);
6008 pci_enable_device(pdev);
6009 pci_set_master(pdev);
Tejun Heo500530f2006-07-03 16:07:27 +09006010}
6011
Tejun Heo3c5100c2006-07-26 16:58:33 +09006012int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg)
Tejun Heo500530f2006-07-03 16:07:27 +09006013{
Jeff Garzikcca39742006-08-24 03:19:22 -04006014 struct ata_host *host = dev_get_drvdata(&pdev->dev);
Tejun Heo500530f2006-07-03 16:07:27 +09006015 int rc = 0;
6016
Jeff Garzikcca39742006-08-24 03:19:22 -04006017 rc = ata_host_suspend(host, mesg);
Tejun Heo500530f2006-07-03 16:07:27 +09006018 if (rc)
6019 return rc;
6020
Tejun Heo3c5100c2006-07-26 16:58:33 +09006021 ata_pci_device_do_suspend(pdev, mesg);
Tejun Heo500530f2006-07-03 16:07:27 +09006022
6023 return 0;
6024}
6025
6026int ata_pci_device_resume(struct pci_dev *pdev)
6027{
Jeff Garzikcca39742006-08-24 03:19:22 -04006028 struct ata_host *host = dev_get_drvdata(&pdev->dev);
Tejun Heo500530f2006-07-03 16:07:27 +09006029
6030 ata_pci_device_do_resume(pdev);
Jeff Garzikcca39742006-08-24 03:19:22 -04006031 ata_host_resume(host);
Jens Axboe9b847542006-01-06 09:28:07 +01006032 return 0;
6033}
Linus Torvalds1da177e2005-04-16 15:20:36 -07006034#endif /* CONFIG_PCI */
6035
6036
Linus Torvalds1da177e2005-04-16 15:20:36 -07006037static int __init ata_init(void)
6038{
Andrew Mortona8601e52006-06-25 01:36:52 -07006039 ata_probe_timeout *= HZ;
Linus Torvalds1da177e2005-04-16 15:20:36 -07006040 ata_wq = create_workqueue("ata");
6041 if (!ata_wq)
6042 return -ENOMEM;
6043
Tejun Heo453b07a2006-05-31 18:27:42 +09006044 ata_aux_wq = create_singlethread_workqueue("ata_aux");
6045 if (!ata_aux_wq) {
6046 destroy_workqueue(ata_wq);
6047 return -ENOMEM;
6048 }
6049
Linus Torvalds1da177e2005-04-16 15:20:36 -07006050 printk(KERN_DEBUG "libata version " DRV_VERSION " loaded.\n");
6051 return 0;
6052}
6053
6054static void __exit ata_exit(void)
6055{
6056 destroy_workqueue(ata_wq);
Tejun Heo453b07a2006-05-31 18:27:42 +09006057 destroy_workqueue(ata_aux_wq);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006058}
6059
Brian Kinga4625082006-11-13 16:32:36 -06006060subsys_initcall(ata_init);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006061module_exit(ata_exit);
6062
Jeff Garzik67846b32005-10-05 02:58:32 -04006063static unsigned long ratelimit_time;
Ingo Molnar34af9462006-06-27 02:53:55 -07006064static DEFINE_SPINLOCK(ata_ratelimit_lock);
Jeff Garzik67846b32005-10-05 02:58:32 -04006065
6066int ata_ratelimit(void)
6067{
6068 int rc;
6069 unsigned long flags;
6070
6071 spin_lock_irqsave(&ata_ratelimit_lock, flags);
6072
6073 if (time_after(jiffies, ratelimit_time)) {
6074 rc = 1;
6075 ratelimit_time = jiffies + (HZ/5);
6076 } else
6077 rc = 0;
6078
6079 spin_unlock_irqrestore(&ata_ratelimit_lock, flags);
6080
6081 return rc;
6082}
6083
Tejun Heoc22daff2006-04-11 22:22:29 +09006084/**
6085 * ata_wait_register - wait until register value changes
6086 * @reg: IO-mapped register
6087 * @mask: Mask to apply to read register value
6088 * @val: Wait condition
6089 * @interval_msec: polling interval in milliseconds
6090 * @timeout_msec: timeout in milliseconds
6091 *
6092 * Waiting for some bits of register to change is a common
6093 * operation for ATA controllers. This function reads 32bit LE
6094 * IO-mapped register @reg and tests for the following condition.
6095 *
6096 * (*@reg & mask) != val
6097 *
6098 * If the condition is met, it returns; otherwise, the process is
6099 * repeated after @interval_msec until timeout.
6100 *
6101 * LOCKING:
6102 * Kernel thread context (may sleep)
6103 *
6104 * RETURNS:
6105 * The final register value.
6106 */
6107u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val,
6108 unsigned long interval_msec,
6109 unsigned long timeout_msec)
6110{
6111 unsigned long timeout;
6112 u32 tmp;
6113
6114 tmp = ioread32(reg);
6115
6116 /* Calculate timeout _after_ the first read to make sure
6117 * preceding writes reach the controller before starting to
6118 * eat away the timeout.
6119 */
6120 timeout = jiffies + (timeout_msec * HZ) / 1000;
6121
6122 while ((tmp & mask) == val && time_before(jiffies, timeout)) {
6123 msleep(interval_msec);
6124 tmp = ioread32(reg);
6125 }
6126
6127 return tmp;
6128}
6129
Linus Torvalds1da177e2005-04-16 15:20:36 -07006130/*
Tejun Heodd5b06c2006-08-10 16:59:12 +09006131 * Dummy port_ops
6132 */
6133static void ata_dummy_noret(struct ata_port *ap) { }
6134static int ata_dummy_ret0(struct ata_port *ap) { return 0; }
6135static void ata_dummy_qc_noret(struct ata_queued_cmd *qc) { }
6136
6137static u8 ata_dummy_check_status(struct ata_port *ap)
6138{
6139 return ATA_DRDY;
6140}
6141
6142static unsigned int ata_dummy_qc_issue(struct ata_queued_cmd *qc)
6143{
6144 return AC_ERR_SYSTEM;
6145}
6146
6147const struct ata_port_operations ata_dummy_port_ops = {
6148 .port_disable = ata_port_disable,
6149 .check_status = ata_dummy_check_status,
6150 .check_altstatus = ata_dummy_check_status,
6151 .dev_select = ata_noop_dev_select,
6152 .qc_prep = ata_noop_qc_prep,
6153 .qc_issue = ata_dummy_qc_issue,
6154 .freeze = ata_dummy_noret,
6155 .thaw = ata_dummy_noret,
6156 .error_handler = ata_dummy_noret,
6157 .post_internal_cmd = ata_dummy_qc_noret,
6158 .irq_clear = ata_dummy_noret,
6159 .port_start = ata_dummy_ret0,
6160 .port_stop = ata_dummy_noret,
6161};
6162
6163/*
Linus Torvalds1da177e2005-04-16 15:20:36 -07006164 * libata is essentially a library of internal helper functions for
6165 * low-level ATA host controller drivers. As such, the API/ABI is
6166 * likely to change as new drivers are added and updated.
6167 * Do not depend on ABI/API stability.
6168 */
6169
Tejun Heoe9c83912006-07-03 16:07:26 +09006170EXPORT_SYMBOL_GPL(sata_deb_timing_normal);
6171EXPORT_SYMBOL_GPL(sata_deb_timing_hotplug);
6172EXPORT_SYMBOL_GPL(sata_deb_timing_long);
Tejun Heodd5b06c2006-08-10 16:59:12 +09006173EXPORT_SYMBOL_GPL(ata_dummy_port_ops);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006174EXPORT_SYMBOL_GPL(ata_std_bios_param);
6175EXPORT_SYMBOL_GPL(ata_std_ports);
Jeff Garzikcca39742006-08-24 03:19:22 -04006176EXPORT_SYMBOL_GPL(ata_host_init);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006177EXPORT_SYMBOL_GPL(ata_device_add);
Tejun Heo720ba122006-05-31 18:28:13 +09006178EXPORT_SYMBOL_GPL(ata_port_detach);
Jeff Garzikcca39742006-08-24 03:19:22 -04006179EXPORT_SYMBOL_GPL(ata_host_remove);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006180EXPORT_SYMBOL_GPL(ata_sg_init);
6181EXPORT_SYMBOL_GPL(ata_sg_init_one);
Tejun Heo9a1004d2006-05-31 18:27:52 +09006182EXPORT_SYMBOL_GPL(ata_hsm_move);
Tejun Heof686bcb2006-05-15 20:58:05 +09006183EXPORT_SYMBOL_GPL(ata_qc_complete);
Tejun Heodedaf2b2006-05-15 21:03:43 +09006184EXPORT_SYMBOL_GPL(ata_qc_complete_multiple);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006185EXPORT_SYMBOL_GPL(ata_qc_issue_prot);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006186EXPORT_SYMBOL_GPL(ata_tf_load);
6187EXPORT_SYMBOL_GPL(ata_tf_read);
6188EXPORT_SYMBOL_GPL(ata_noop_dev_select);
6189EXPORT_SYMBOL_GPL(ata_std_dev_select);
6190EXPORT_SYMBOL_GPL(ata_tf_to_fis);
6191EXPORT_SYMBOL_GPL(ata_tf_from_fis);
6192EXPORT_SYMBOL_GPL(ata_check_status);
6193EXPORT_SYMBOL_GPL(ata_altstatus);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006194EXPORT_SYMBOL_GPL(ata_exec_command);
6195EXPORT_SYMBOL_GPL(ata_port_start);
6196EXPORT_SYMBOL_GPL(ata_port_stop);
Jeff Garzikaa8f0dc2005-05-26 21:54:27 -04006197EXPORT_SYMBOL_GPL(ata_host_stop);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006198EXPORT_SYMBOL_GPL(ata_interrupt);
Alan Coxa6b2c5d2006-05-22 16:59:59 +01006199EXPORT_SYMBOL_GPL(ata_mmio_data_xfer);
6200EXPORT_SYMBOL_GPL(ata_pio_data_xfer);
Alan Cox75e99582006-05-24 14:14:41 +01006201EXPORT_SYMBOL_GPL(ata_pio_data_xfer_noirq);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006202EXPORT_SYMBOL_GPL(ata_qc_prep);
Brian Kinge46834c2006-03-17 17:04:03 -06006203EXPORT_SYMBOL_GPL(ata_noop_qc_prep);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006204EXPORT_SYMBOL_GPL(ata_bmdma_setup);
6205EXPORT_SYMBOL_GPL(ata_bmdma_start);
6206EXPORT_SYMBOL_GPL(ata_bmdma_irq_clear);
6207EXPORT_SYMBOL_GPL(ata_bmdma_status);
6208EXPORT_SYMBOL_GPL(ata_bmdma_stop);
Tejun Heo6d97dbd2006-05-15 20:58:24 +09006209EXPORT_SYMBOL_GPL(ata_bmdma_freeze);
6210EXPORT_SYMBOL_GPL(ata_bmdma_thaw);
6211EXPORT_SYMBOL_GPL(ata_bmdma_drive_eh);
6212EXPORT_SYMBOL_GPL(ata_bmdma_error_handler);
6213EXPORT_SYMBOL_GPL(ata_bmdma_post_internal_cmd);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006214EXPORT_SYMBOL_GPL(ata_port_probe);
Tejun Heo3c567b72006-05-15 20:57:23 +09006215EXPORT_SYMBOL_GPL(sata_set_spd);
Tejun Heod7bb4cc2006-05-31 18:27:46 +09006216EXPORT_SYMBOL_GPL(sata_phy_debounce);
6217EXPORT_SYMBOL_GPL(sata_phy_resume);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006218EXPORT_SYMBOL_GPL(sata_phy_reset);
6219EXPORT_SYMBOL_GPL(__sata_phy_reset);
6220EXPORT_SYMBOL_GPL(ata_bus_reset);
Tejun Heof5914a42006-05-31 18:27:48 +09006221EXPORT_SYMBOL_GPL(ata_std_prereset);
Tejun Heoc2bd5802006-01-24 17:05:22 +09006222EXPORT_SYMBOL_GPL(ata_std_softreset);
Tejun Heob6103f62006-11-01 17:59:53 +09006223EXPORT_SYMBOL_GPL(sata_port_hardreset);
Tejun Heoc2bd5802006-01-24 17:05:22 +09006224EXPORT_SYMBOL_GPL(sata_std_hardreset);
6225EXPORT_SYMBOL_GPL(ata_std_postreset);
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05006226EXPORT_SYMBOL_GPL(ata_dev_classify);
6227EXPORT_SYMBOL_GPL(ata_dev_pair);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006228EXPORT_SYMBOL_GPL(ata_port_disable);
Jeff Garzik67846b32005-10-05 02:58:32 -04006229EXPORT_SYMBOL_GPL(ata_ratelimit);
Tejun Heoc22daff2006-04-11 22:22:29 +09006230EXPORT_SYMBOL_GPL(ata_wait_register);
Tejun Heo6f8b9952006-01-24 17:05:21 +09006231EXPORT_SYMBOL_GPL(ata_busy_sleep);
Tejun Heo86e45b62006-03-05 15:29:09 +09006232EXPORT_SYMBOL_GPL(ata_port_queue_task);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006233EXPORT_SYMBOL_GPL(ata_scsi_ioctl);
6234EXPORT_SYMBOL_GPL(ata_scsi_queuecmd);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006235EXPORT_SYMBOL_GPL(ata_scsi_slave_config);
Tejun Heo83c47bc2006-05-31 18:28:07 +09006236EXPORT_SYMBOL_GPL(ata_scsi_slave_destroy);
Tejun Heoa6e6ce82006-05-15 21:03:48 +09006237EXPORT_SYMBOL_GPL(ata_scsi_change_queue_depth);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006238EXPORT_SYMBOL_GPL(ata_scsi_release);
6239EXPORT_SYMBOL_GPL(ata_host_intr);
Tejun Heo34bf2172006-05-15 20:57:46 +09006240EXPORT_SYMBOL_GPL(sata_scr_valid);
6241EXPORT_SYMBOL_GPL(sata_scr_read);
6242EXPORT_SYMBOL_GPL(sata_scr_write);
6243EXPORT_SYMBOL_GPL(sata_scr_write_flush);
6244EXPORT_SYMBOL_GPL(ata_port_online);
6245EXPORT_SYMBOL_GPL(ata_port_offline);
Jeff Garzikcca39742006-08-24 03:19:22 -04006246EXPORT_SYMBOL_GPL(ata_host_suspend);
6247EXPORT_SYMBOL_GPL(ata_host_resume);
Tejun Heo6a62a042006-02-13 10:02:46 +09006248EXPORT_SYMBOL_GPL(ata_id_string);
6249EXPORT_SYMBOL_GPL(ata_id_c_string);
Alan Cox6919a0a2006-10-27 19:08:46 -07006250EXPORT_SYMBOL_GPL(ata_device_blacklisted);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006251EXPORT_SYMBOL_GPL(ata_scsi_simulate);
6252
Alan Cox1bc4ccf2006-01-09 17:18:14 +00006253EXPORT_SYMBOL_GPL(ata_pio_need_iordy);
Alan Cox452503f2005-10-21 19:01:32 -04006254EXPORT_SYMBOL_GPL(ata_timing_compute);
6255EXPORT_SYMBOL_GPL(ata_timing_merge);
6256
Linus Torvalds1da177e2005-04-16 15:20:36 -07006257#ifdef CONFIG_PCI
6258EXPORT_SYMBOL_GPL(pci_test_config_bits);
Jeff Garzik374b1872005-08-30 05:42:52 -04006259EXPORT_SYMBOL_GPL(ata_pci_host_stop);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006260EXPORT_SYMBOL_GPL(ata_pci_init_native_mode);
6261EXPORT_SYMBOL_GPL(ata_pci_init_one);
6262EXPORT_SYMBOL_GPL(ata_pci_remove_one);
Tejun Heo500530f2006-07-03 16:07:27 +09006263EXPORT_SYMBOL_GPL(ata_pci_device_do_suspend);
6264EXPORT_SYMBOL_GPL(ata_pci_device_do_resume);
Jens Axboe9b847542006-01-06 09:28:07 +01006265EXPORT_SYMBOL_GPL(ata_pci_device_suspend);
6266EXPORT_SYMBOL_GPL(ata_pci_device_resume);
Alan Cox67951ad2006-03-22 15:55:54 +00006267EXPORT_SYMBOL_GPL(ata_pci_default_filter);
6268EXPORT_SYMBOL_GPL(ata_pci_clear_simplex);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006269#endif /* CONFIG_PCI */
Jens Axboe9b847542006-01-06 09:28:07 +01006270
Jens Axboe9b847542006-01-06 09:28:07 +01006271EXPORT_SYMBOL_GPL(ata_scsi_device_suspend);
6272EXPORT_SYMBOL_GPL(ata_scsi_device_resume);
Tejun Heoece1d632006-04-02 18:51:53 +09006273
Tejun Heoece1d632006-04-02 18:51:53 +09006274EXPORT_SYMBOL_GPL(ata_eng_timeout);
Tejun Heo7b70fc02006-05-15 20:58:07 +09006275EXPORT_SYMBOL_GPL(ata_port_schedule_eh);
6276EXPORT_SYMBOL_GPL(ata_port_abort);
Tejun Heoe3180492006-05-15 20:58:09 +09006277EXPORT_SYMBOL_GPL(ata_port_freeze);
6278EXPORT_SYMBOL_GPL(ata_eh_freeze_port);
6279EXPORT_SYMBOL_GPL(ata_eh_thaw_port);
Tejun Heoece1d632006-04-02 18:51:53 +09006280EXPORT_SYMBOL_GPL(ata_eh_qc_complete);
6281EXPORT_SYMBOL_GPL(ata_eh_qc_retry);
Tejun Heo022bdb02006-05-15 20:58:22 +09006282EXPORT_SYMBOL_GPL(ata_do_eh);