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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
35#include <linux/config.h>
36#include <linux/kernel.h>
37#include <linux/module.h>
38#include <linux/pci.h>
39#include <linux/init.h>
40#include <linux/list.h>
41#include <linux/mm.h>
42#include <linux/highmem.h>
43#include <linux/spinlock.h>
44#include <linux/blkdev.h>
45#include <linux/delay.h>
46#include <linux/timer.h>
47#include <linux/interrupt.h>
48#include <linux/completion.h>
49#include <linux/suspend.h>
50#include <linux/workqueue.h>
Jeff Garzik67846b32005-10-05 02:58:32 -040051#include <linux/jiffies.h>
David Hardeman378f0582005-09-17 17:55:31 +100052#include <linux/scatterlist.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070053#include <scsi/scsi.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070054#include "scsi_priv.h"
Jeff Garzik193515d2005-11-07 00:59:37 -050055#include <scsi/scsi_cmnd.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070056#include <scsi/scsi_host.h>
57#include <linux/libata.h>
58#include <asm/io.h>
59#include <asm/semaphore.h>
60#include <asm/byteorder.h>
61
62#include "libata.h"
63
64static unsigned int ata_busy_sleep (struct ata_port *ap,
65 unsigned long tmout_pat,
66 unsigned long tmout);
Albert Lee59a10b12005-10-12 15:09:42 +080067static void ata_dev_reread_id(struct ata_port *ap, struct ata_device *dev);
Albert Lee8bf62ece2005-05-12 15:29:42 -040068static void ata_dev_init_params(struct ata_port *ap, struct ata_device *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -070069static void ata_set_mode(struct ata_port *ap);
70static void ata_dev_set_xfermode(struct ata_port *ap, struct ata_device *dev);
Jeff Garzik057ace52005-10-22 14:27:05 -040071static unsigned int ata_get_mode_mask(const struct ata_port *ap, int shift);
Linus Torvalds1da177e2005-04-16 15:20:36 -070072static int fgb(u32 bitmap);
Jeff Garzik057ace52005-10-22 14:27:05 -040073static int ata_choose_xfer_mode(const struct ata_port *ap,
Linus Torvalds1da177e2005-04-16 15:20:36 -070074 u8 *xfer_mode_out,
75 unsigned int *xfer_shift_out);
Linus Torvalds1da177e2005-04-16 15:20:36 -070076
77static unsigned int ata_unique_id = 1;
78static struct workqueue_struct *ata_wq;
79
Jeff Garzik1623c812005-08-30 03:37:42 -040080int atapi_enabled = 0;
81module_param(atapi_enabled, int, 0444);
82MODULE_PARM_DESC(atapi_enabled, "Enable discovery of ATAPI devices (0=off, 1=on)");
83
Linus Torvalds1da177e2005-04-16 15:20:36 -070084MODULE_AUTHOR("Jeff Garzik");
85MODULE_DESCRIPTION("Library module for ATA devices");
86MODULE_LICENSE("GPL");
87MODULE_VERSION(DRV_VERSION);
88
89/**
Randy Dunlap6f0ef4f2005-10-25 01:44:30 -040090 * ata_tf_load_pio - send taskfile registers to host controller
Linus Torvalds1da177e2005-04-16 15:20:36 -070091 * @ap: Port to which output is sent
92 * @tf: ATA taskfile register set
93 *
94 * Outputs ATA taskfile to standard ATA host controller.
95 *
96 * LOCKING:
97 * Inherited from caller.
98 */
99
Jeff Garzik057ace52005-10-22 14:27:05 -0400100static void ata_tf_load_pio(struct ata_port *ap, const struct ata_taskfile *tf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700101{
102 struct ata_ioports *ioaddr = &ap->ioaddr;
103 unsigned int is_addr = tf->flags & ATA_TFLAG_ISADDR;
104
105 if (tf->ctl != ap->last_ctl) {
106 outb(tf->ctl, ioaddr->ctl_addr);
107 ap->last_ctl = tf->ctl;
108 ata_wait_idle(ap);
109 }
110
111 if (is_addr && (tf->flags & ATA_TFLAG_LBA48)) {
112 outb(tf->hob_feature, ioaddr->feature_addr);
113 outb(tf->hob_nsect, ioaddr->nsect_addr);
114 outb(tf->hob_lbal, ioaddr->lbal_addr);
115 outb(tf->hob_lbam, ioaddr->lbam_addr);
116 outb(tf->hob_lbah, ioaddr->lbah_addr);
117 VPRINTK("hob: feat 0x%X nsect 0x%X, lba 0x%X 0x%X 0x%X\n",
118 tf->hob_feature,
119 tf->hob_nsect,
120 tf->hob_lbal,
121 tf->hob_lbam,
122 tf->hob_lbah);
123 }
124
125 if (is_addr) {
126 outb(tf->feature, ioaddr->feature_addr);
127 outb(tf->nsect, ioaddr->nsect_addr);
128 outb(tf->lbal, ioaddr->lbal_addr);
129 outb(tf->lbam, ioaddr->lbam_addr);
130 outb(tf->lbah, ioaddr->lbah_addr);
131 VPRINTK("feat 0x%X nsect 0x%X lba 0x%X 0x%X 0x%X\n",
132 tf->feature,
133 tf->nsect,
134 tf->lbal,
135 tf->lbam,
136 tf->lbah);
137 }
138
139 if (tf->flags & ATA_TFLAG_DEVICE) {
140 outb(tf->device, ioaddr->device_addr);
141 VPRINTK("device 0x%X\n", tf->device);
142 }
143
144 ata_wait_idle(ap);
145}
146
147/**
148 * ata_tf_load_mmio - send taskfile registers to host controller
149 * @ap: Port to which output is sent
150 * @tf: ATA taskfile register set
151 *
152 * Outputs ATA taskfile to standard ATA host controller using MMIO.
153 *
154 * LOCKING:
155 * Inherited from caller.
156 */
157
Jeff Garzik057ace52005-10-22 14:27:05 -0400158static void ata_tf_load_mmio(struct ata_port *ap, const struct ata_taskfile *tf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700159{
160 struct ata_ioports *ioaddr = &ap->ioaddr;
161 unsigned int is_addr = tf->flags & ATA_TFLAG_ISADDR;
162
163 if (tf->ctl != ap->last_ctl) {
164 writeb(tf->ctl, (void __iomem *) ap->ioaddr.ctl_addr);
165 ap->last_ctl = tf->ctl;
166 ata_wait_idle(ap);
167 }
168
169 if (is_addr && (tf->flags & ATA_TFLAG_LBA48)) {
170 writeb(tf->hob_feature, (void __iomem *) ioaddr->feature_addr);
171 writeb(tf->hob_nsect, (void __iomem *) ioaddr->nsect_addr);
172 writeb(tf->hob_lbal, (void __iomem *) ioaddr->lbal_addr);
173 writeb(tf->hob_lbam, (void __iomem *) ioaddr->lbam_addr);
174 writeb(tf->hob_lbah, (void __iomem *) ioaddr->lbah_addr);
175 VPRINTK("hob: feat 0x%X nsect 0x%X, lba 0x%X 0x%X 0x%X\n",
176 tf->hob_feature,
177 tf->hob_nsect,
178 tf->hob_lbal,
179 tf->hob_lbam,
180 tf->hob_lbah);
181 }
182
183 if (is_addr) {
184 writeb(tf->feature, (void __iomem *) ioaddr->feature_addr);
185 writeb(tf->nsect, (void __iomem *) ioaddr->nsect_addr);
186 writeb(tf->lbal, (void __iomem *) ioaddr->lbal_addr);
187 writeb(tf->lbam, (void __iomem *) ioaddr->lbam_addr);
188 writeb(tf->lbah, (void __iomem *) ioaddr->lbah_addr);
189 VPRINTK("feat 0x%X nsect 0x%X lba 0x%X 0x%X 0x%X\n",
190 tf->feature,
191 tf->nsect,
192 tf->lbal,
193 tf->lbam,
194 tf->lbah);
195 }
196
197 if (tf->flags & ATA_TFLAG_DEVICE) {
198 writeb(tf->device, (void __iomem *) ioaddr->device_addr);
199 VPRINTK("device 0x%X\n", tf->device);
200 }
201
202 ata_wait_idle(ap);
203}
204
Edward Falk0baab862005-06-02 18:17:13 -0400205
206/**
207 * ata_tf_load - send taskfile registers to host controller
208 * @ap: Port to which output is sent
209 * @tf: ATA taskfile register set
210 *
211 * Outputs ATA taskfile to standard ATA host controller using MMIO
212 * or PIO as indicated by the ATA_FLAG_MMIO flag.
213 * Writes the control, feature, nsect, lbal, lbam, and lbah registers.
214 * Optionally (ATA_TFLAG_LBA48) writes hob_feature, hob_nsect,
215 * hob_lbal, hob_lbam, and hob_lbah.
216 *
217 * This function waits for idle (!BUSY and !DRQ) after writing
218 * registers. If the control register has a new value, this
219 * function also waits for idle after writing control and before
220 * writing the remaining registers.
221 *
222 * May be used as the tf_load() entry in ata_port_operations.
223 *
224 * LOCKING:
225 * Inherited from caller.
226 */
Jeff Garzik057ace52005-10-22 14:27:05 -0400227void ata_tf_load(struct ata_port *ap, const struct ata_taskfile *tf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700228{
229 if (ap->flags & ATA_FLAG_MMIO)
230 ata_tf_load_mmio(ap, tf);
231 else
232 ata_tf_load_pio(ap, tf);
233}
234
235/**
Edward Falk0baab862005-06-02 18:17:13 -0400236 * ata_exec_command_pio - issue ATA command to host controller
Linus Torvalds1da177e2005-04-16 15:20:36 -0700237 * @ap: port to which command is being issued
238 * @tf: ATA taskfile register set
239 *
Edward Falk0baab862005-06-02 18:17:13 -0400240 * Issues PIO write to ATA command register, with proper
Linus Torvalds1da177e2005-04-16 15:20:36 -0700241 * synchronization with interrupt handler / other threads.
242 *
243 * LOCKING:
244 * spin_lock_irqsave(host_set lock)
245 */
246
Jeff Garzik057ace52005-10-22 14:27:05 -0400247static void ata_exec_command_pio(struct ata_port *ap, const struct ata_taskfile *tf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700248{
249 DPRINTK("ata%u: cmd 0x%X\n", ap->id, tf->command);
250
251 outb(tf->command, ap->ioaddr.command_addr);
252 ata_pause(ap);
253}
254
255
256/**
257 * ata_exec_command_mmio - issue ATA command to host controller
258 * @ap: port to which command is being issued
259 * @tf: ATA taskfile register set
260 *
261 * Issues MMIO write to ATA command register, with proper
262 * synchronization with interrupt handler / other threads.
263 *
264 * LOCKING:
265 * spin_lock_irqsave(host_set lock)
266 */
267
Jeff Garzik057ace52005-10-22 14:27:05 -0400268static void ata_exec_command_mmio(struct ata_port *ap, const struct ata_taskfile *tf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700269{
270 DPRINTK("ata%u: cmd 0x%X\n", ap->id, tf->command);
271
272 writeb(tf->command, (void __iomem *) ap->ioaddr.command_addr);
273 ata_pause(ap);
274}
275
Edward Falk0baab862005-06-02 18:17:13 -0400276
277/**
278 * ata_exec_command - issue ATA command to host controller
279 * @ap: port to which command is being issued
280 * @tf: ATA taskfile register set
281 *
282 * Issues PIO/MMIO write to ATA command register, with proper
283 * synchronization with interrupt handler / other threads.
284 *
285 * LOCKING:
286 * spin_lock_irqsave(host_set lock)
287 */
Jeff Garzik057ace52005-10-22 14:27:05 -0400288void ata_exec_command(struct ata_port *ap, const struct ata_taskfile *tf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700289{
290 if (ap->flags & ATA_FLAG_MMIO)
291 ata_exec_command_mmio(ap, tf);
292 else
293 ata_exec_command_pio(ap, tf);
294}
295
296/**
Linus Torvalds1da177e2005-04-16 15:20:36 -0700297 * ata_tf_to_host - issue ATA taskfile to host controller
298 * @ap: port to which command is being issued
299 * @tf: ATA taskfile register set
300 *
301 * Issues ATA taskfile register set to ATA host controller,
302 * with proper synchronization with interrupt handler and
303 * other threads.
304 *
305 * LOCKING:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700306 * spin_lock_irqsave(host_set lock)
307 */
308
Jeff Garzike5338252005-10-30 21:37:17 -0500309static inline void ata_tf_to_host(struct ata_port *ap,
310 const struct ata_taskfile *tf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700311{
312 ap->ops->tf_load(ap, tf);
313 ap->ops->exec_command(ap, tf);
314}
315
316/**
Edward Falk0baab862005-06-02 18:17:13 -0400317 * ata_tf_read_pio - input device's ATA taskfile shadow registers
Linus Torvalds1da177e2005-04-16 15:20:36 -0700318 * @ap: Port from which input is read
319 * @tf: ATA taskfile register set for storing input
320 *
321 * Reads ATA taskfile registers for currently-selected device
322 * into @tf.
323 *
324 * LOCKING:
325 * Inherited from caller.
326 */
327
328static void ata_tf_read_pio(struct ata_port *ap, struct ata_taskfile *tf)
329{
330 struct ata_ioports *ioaddr = &ap->ioaddr;
331
Jeff Garzikac19bff2005-10-29 13:58:21 -0400332 tf->command = ata_check_status(ap);
Jeff Garzik0169e282005-10-29 21:25:10 -0400333 tf->feature = inb(ioaddr->error_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700334 tf->nsect = inb(ioaddr->nsect_addr);
335 tf->lbal = inb(ioaddr->lbal_addr);
336 tf->lbam = inb(ioaddr->lbam_addr);
337 tf->lbah = inb(ioaddr->lbah_addr);
338 tf->device = inb(ioaddr->device_addr);
339
340 if (tf->flags & ATA_TFLAG_LBA48) {
341 outb(tf->ctl | ATA_HOB, ioaddr->ctl_addr);
342 tf->hob_feature = inb(ioaddr->error_addr);
343 tf->hob_nsect = inb(ioaddr->nsect_addr);
344 tf->hob_lbal = inb(ioaddr->lbal_addr);
345 tf->hob_lbam = inb(ioaddr->lbam_addr);
346 tf->hob_lbah = inb(ioaddr->lbah_addr);
347 }
348}
349
350/**
351 * ata_tf_read_mmio - input device's ATA taskfile shadow registers
352 * @ap: Port from which input is read
353 * @tf: ATA taskfile register set for storing input
354 *
355 * Reads ATA taskfile registers for currently-selected device
356 * into @tf via MMIO.
357 *
358 * LOCKING:
359 * Inherited from caller.
360 */
361
362static void ata_tf_read_mmio(struct ata_port *ap, struct ata_taskfile *tf)
363{
364 struct ata_ioports *ioaddr = &ap->ioaddr;
365
Jeff Garzikac19bff2005-10-29 13:58:21 -0400366 tf->command = ata_check_status(ap);
Jeff Garzik0169e282005-10-29 21:25:10 -0400367 tf->feature = readb((void __iomem *)ioaddr->error_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700368 tf->nsect = readb((void __iomem *)ioaddr->nsect_addr);
369 tf->lbal = readb((void __iomem *)ioaddr->lbal_addr);
370 tf->lbam = readb((void __iomem *)ioaddr->lbam_addr);
371 tf->lbah = readb((void __iomem *)ioaddr->lbah_addr);
372 tf->device = readb((void __iomem *)ioaddr->device_addr);
373
374 if (tf->flags & ATA_TFLAG_LBA48) {
375 writeb(tf->ctl | ATA_HOB, (void __iomem *) ap->ioaddr.ctl_addr);
376 tf->hob_feature = readb((void __iomem *)ioaddr->error_addr);
377 tf->hob_nsect = readb((void __iomem *)ioaddr->nsect_addr);
378 tf->hob_lbal = readb((void __iomem *)ioaddr->lbal_addr);
379 tf->hob_lbam = readb((void __iomem *)ioaddr->lbam_addr);
380 tf->hob_lbah = readb((void __iomem *)ioaddr->lbah_addr);
381 }
382}
383
Edward Falk0baab862005-06-02 18:17:13 -0400384
385/**
386 * ata_tf_read - input device's ATA taskfile shadow registers
387 * @ap: Port from which input is read
388 * @tf: ATA taskfile register set for storing input
389 *
390 * Reads ATA taskfile registers for currently-selected device
391 * into @tf.
392 *
393 * Reads nsect, lbal, lbam, lbah, and device. If ATA_TFLAG_LBA48
394 * is set, also reads the hob registers.
395 *
396 * May be used as the tf_read() entry in ata_port_operations.
397 *
398 * LOCKING:
399 * Inherited from caller.
400 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700401void ata_tf_read(struct ata_port *ap, struct ata_taskfile *tf)
402{
403 if (ap->flags & ATA_FLAG_MMIO)
404 ata_tf_read_mmio(ap, tf);
405 else
406 ata_tf_read_pio(ap, tf);
407}
408
409/**
410 * ata_check_status_pio - Read device status reg & clear interrupt
411 * @ap: port where the device is
412 *
413 * Reads ATA taskfile status register for currently-selected device
Edward Falk0baab862005-06-02 18:17:13 -0400414 * and return its value. This also clears pending interrupts
Linus Torvalds1da177e2005-04-16 15:20:36 -0700415 * from this device
416 *
417 * LOCKING:
418 * Inherited from caller.
419 */
420static u8 ata_check_status_pio(struct ata_port *ap)
421{
422 return inb(ap->ioaddr.status_addr);
423}
424
425/**
426 * ata_check_status_mmio - Read device status reg & clear interrupt
427 * @ap: port where the device is
428 *
429 * Reads ATA taskfile status register for currently-selected device
Edward Falk0baab862005-06-02 18:17:13 -0400430 * via MMIO and return its value. This also clears pending interrupts
Linus Torvalds1da177e2005-04-16 15:20:36 -0700431 * from this device
432 *
433 * LOCKING:
434 * Inherited from caller.
435 */
436static u8 ata_check_status_mmio(struct ata_port *ap)
437{
438 return readb((void __iomem *) ap->ioaddr.status_addr);
439}
440
Edward Falk0baab862005-06-02 18:17:13 -0400441
442/**
443 * ata_check_status - Read device status reg & clear interrupt
444 * @ap: port where the device is
445 *
446 * Reads ATA taskfile status register for currently-selected device
447 * and return its value. This also clears pending interrupts
448 * from this device
449 *
450 * May be used as the check_status() entry in ata_port_operations.
451 *
452 * LOCKING:
453 * Inherited from caller.
454 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700455u8 ata_check_status(struct ata_port *ap)
456{
457 if (ap->flags & ATA_FLAG_MMIO)
458 return ata_check_status_mmio(ap);
459 return ata_check_status_pio(ap);
460}
461
Edward Falk0baab862005-06-02 18:17:13 -0400462
463/**
464 * ata_altstatus - Read device alternate status reg
465 * @ap: port where the device is
466 *
467 * Reads ATA taskfile alternate status register for
468 * currently-selected device and return its value.
469 *
470 * Note: may NOT be used as the check_altstatus() entry in
471 * ata_port_operations.
472 *
473 * LOCKING:
474 * Inherited from caller.
475 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700476u8 ata_altstatus(struct ata_port *ap)
477{
478 if (ap->ops->check_altstatus)
479 return ap->ops->check_altstatus(ap);
480
481 if (ap->flags & ATA_FLAG_MMIO)
482 return readb((void __iomem *)ap->ioaddr.altstatus_addr);
483 return inb(ap->ioaddr.altstatus_addr);
484}
485
Edward Falk0baab862005-06-02 18:17:13 -0400486
487/**
Linus Torvalds1da177e2005-04-16 15:20:36 -0700488 * ata_tf_to_fis - Convert ATA taskfile to SATA FIS structure
489 * @tf: Taskfile to convert
490 * @fis: Buffer into which data will output
491 * @pmp: Port multiplier port
492 *
493 * Converts a standard ATA taskfile to a Serial ATA
494 * FIS structure (Register - Host to Device).
495 *
496 * LOCKING:
497 * Inherited from caller.
498 */
499
Jeff Garzik057ace52005-10-22 14:27:05 -0400500void ata_tf_to_fis(const struct ata_taskfile *tf, u8 *fis, u8 pmp)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700501{
502 fis[0] = 0x27; /* Register - Host to Device FIS */
503 fis[1] = (pmp & 0xf) | (1 << 7); /* Port multiplier number,
504 bit 7 indicates Command FIS */
505 fis[2] = tf->command;
506 fis[3] = tf->feature;
507
508 fis[4] = tf->lbal;
509 fis[5] = tf->lbam;
510 fis[6] = tf->lbah;
511 fis[7] = tf->device;
512
513 fis[8] = tf->hob_lbal;
514 fis[9] = tf->hob_lbam;
515 fis[10] = tf->hob_lbah;
516 fis[11] = tf->hob_feature;
517
518 fis[12] = tf->nsect;
519 fis[13] = tf->hob_nsect;
520 fis[14] = 0;
521 fis[15] = tf->ctl;
522
523 fis[16] = 0;
524 fis[17] = 0;
525 fis[18] = 0;
526 fis[19] = 0;
527}
528
529/**
530 * ata_tf_from_fis - Convert SATA FIS to ATA taskfile
531 * @fis: Buffer from which data will be input
532 * @tf: Taskfile to output
533 *
Mark Lorde12a1be2005-11-12 18:55:45 -0500534 * Converts a serial ATA FIS structure to a standard ATA taskfile.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700535 *
536 * LOCKING:
537 * Inherited from caller.
538 */
539
Jeff Garzik057ace52005-10-22 14:27:05 -0400540void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700541{
542 tf->command = fis[2]; /* status */
543 tf->feature = fis[3]; /* error */
544
545 tf->lbal = fis[4];
546 tf->lbam = fis[5];
547 tf->lbah = fis[6];
548 tf->device = fis[7];
549
550 tf->hob_lbal = fis[8];
551 tf->hob_lbam = fis[9];
552 tf->hob_lbah = fis[10];
553
554 tf->nsect = fis[12];
555 tf->hob_nsect = fis[13];
556}
557
Albert Lee8cbd6df2005-10-12 15:06:27 +0800558static const u8 ata_rw_cmds[] = {
559 /* pio multi */
560 ATA_CMD_READ_MULTI,
561 ATA_CMD_WRITE_MULTI,
562 ATA_CMD_READ_MULTI_EXT,
563 ATA_CMD_WRITE_MULTI_EXT,
Tejun Heo9a3dccc2006-01-06 09:56:18 +0100564 0,
565 0,
566 0,
567 ATA_CMD_WRITE_MULTI_FUA_EXT,
Albert Lee8cbd6df2005-10-12 15:06:27 +0800568 /* pio */
569 ATA_CMD_PIO_READ,
570 ATA_CMD_PIO_WRITE,
571 ATA_CMD_PIO_READ_EXT,
572 ATA_CMD_PIO_WRITE_EXT,
Tejun Heo9a3dccc2006-01-06 09:56:18 +0100573 0,
574 0,
575 0,
576 0,
Albert Lee8cbd6df2005-10-12 15:06:27 +0800577 /* dma */
578 ATA_CMD_READ,
579 ATA_CMD_WRITE,
580 ATA_CMD_READ_EXT,
Tejun Heo9a3dccc2006-01-06 09:56:18 +0100581 ATA_CMD_WRITE_EXT,
582 0,
583 0,
584 0,
585 ATA_CMD_WRITE_FUA_EXT
Albert Lee8cbd6df2005-10-12 15:06:27 +0800586};
Linus Torvalds1da177e2005-04-16 15:20:36 -0700587
588/**
Albert Lee8cbd6df2005-10-12 15:06:27 +0800589 * ata_rwcmd_protocol - set taskfile r/w commands and protocol
590 * @qc: command to examine and configure
Linus Torvalds1da177e2005-04-16 15:20:36 -0700591 *
Albert Lee8cbd6df2005-10-12 15:06:27 +0800592 * Examine the device configuration and tf->flags to calculate
593 * the proper read/write commands and protocol to use.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700594 *
595 * LOCKING:
596 * caller.
597 */
Tejun Heo9a3dccc2006-01-06 09:56:18 +0100598int ata_rwcmd_protocol(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700599{
Albert Lee8cbd6df2005-10-12 15:06:27 +0800600 struct ata_taskfile *tf = &qc->tf;
601 struct ata_device *dev = qc->dev;
Tejun Heo9a3dccc2006-01-06 09:56:18 +0100602 u8 cmd;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700603
Tejun Heo9a3dccc2006-01-06 09:56:18 +0100604 int index, fua, lba48, write;
Albert Lee8cbd6df2005-10-12 15:06:27 +0800605
Tejun Heo9a3dccc2006-01-06 09:56:18 +0100606 fua = (tf->flags & ATA_TFLAG_FUA) ? 4 : 0;
Albert Lee8cbd6df2005-10-12 15:06:27 +0800607 lba48 = (tf->flags & ATA_TFLAG_LBA48) ? 2 : 0;
608 write = (tf->flags & ATA_TFLAG_WRITE) ? 1 : 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700609
Albert Lee8cbd6df2005-10-12 15:06:27 +0800610 if (dev->flags & ATA_DFLAG_PIO) {
611 tf->protocol = ATA_PROT_PIO;
Tejun Heo9a3dccc2006-01-06 09:56:18 +0100612 index = dev->multi_count ? 0 : 8;
Alan Cox8d238e02006-01-17 20:50:31 +0000613 } else if (lba48 && (qc->ap->flags & ATA_FLAG_PIO_LBA48)) {
614 /* Unable to use DMA due to host limitation */
615 tf->protocol = ATA_PROT_PIO;
616 index = dev->multi_count ? 0 : 4;
Albert Lee8cbd6df2005-10-12 15:06:27 +0800617 } else {
618 tf->protocol = ATA_PROT_DMA;
Tejun Heo9a3dccc2006-01-06 09:56:18 +0100619 index = 16;
Albert Lee8cbd6df2005-10-12 15:06:27 +0800620 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700621
Tejun Heo9a3dccc2006-01-06 09:56:18 +0100622 cmd = ata_rw_cmds[index + fua + lba48 + write];
623 if (cmd) {
624 tf->command = cmd;
625 return 0;
626 }
627 return -1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700628}
629
Arjan van de Ven98ac62d2005-11-28 10:06:23 +0100630static const char * const xfer_mode_str[] = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700631 "UDMA/16",
632 "UDMA/25",
633 "UDMA/33",
634 "UDMA/44",
635 "UDMA/66",
636 "UDMA/100",
637 "UDMA/133",
638 "UDMA7",
639 "MWDMA0",
640 "MWDMA1",
641 "MWDMA2",
642 "PIO0",
643 "PIO1",
644 "PIO2",
645 "PIO3",
646 "PIO4",
647};
648
649/**
650 * ata_udma_string - convert UDMA bit offset to string
651 * @mask: mask of bits supported; only highest bit counts.
652 *
653 * Determine string which represents the highest speed
654 * (highest bit in @udma_mask).
655 *
656 * LOCKING:
657 * None.
658 *
659 * RETURNS:
660 * Constant C string representing highest speed listed in
661 * @udma_mask, or the constant C string "<n/a>".
662 */
663
664static const char *ata_mode_string(unsigned int mask)
665{
666 int i;
667
668 for (i = 7; i >= 0; i--)
669 if (mask & (1 << i))
670 goto out;
671 for (i = ATA_SHIFT_MWDMA + 2; i >= ATA_SHIFT_MWDMA; i--)
672 if (mask & (1 << i))
673 goto out;
674 for (i = ATA_SHIFT_PIO + 4; i >= ATA_SHIFT_PIO; i--)
675 if (mask & (1 << i))
676 goto out;
677
678 return "<n/a>";
679
680out:
681 return xfer_mode_str[i];
682}
683
684/**
685 * ata_pio_devchk - PATA device presence detection
686 * @ap: ATA channel to examine
687 * @device: Device to examine (starting at zero)
688 *
689 * This technique was originally described in
690 * Hale Landis's ATADRVR (www.ata-atapi.com), and
691 * later found its way into the ATA/ATAPI spec.
692 *
693 * Write a pattern to the ATA shadow registers,
694 * and if a device is present, it will respond by
695 * correctly storing and echoing back the
696 * ATA shadow register contents.
697 *
698 * LOCKING:
699 * caller.
700 */
701
702static unsigned int ata_pio_devchk(struct ata_port *ap,
703 unsigned int device)
704{
705 struct ata_ioports *ioaddr = &ap->ioaddr;
706 u8 nsect, lbal;
707
708 ap->ops->dev_select(ap, device);
709
710 outb(0x55, ioaddr->nsect_addr);
711 outb(0xaa, ioaddr->lbal_addr);
712
713 outb(0xaa, ioaddr->nsect_addr);
714 outb(0x55, ioaddr->lbal_addr);
715
716 outb(0x55, ioaddr->nsect_addr);
717 outb(0xaa, ioaddr->lbal_addr);
718
719 nsect = inb(ioaddr->nsect_addr);
720 lbal = inb(ioaddr->lbal_addr);
721
722 if ((nsect == 0x55) && (lbal == 0xaa))
723 return 1; /* we found a device */
724
725 return 0; /* nothing found */
726}
727
728/**
729 * ata_mmio_devchk - PATA device presence detection
730 * @ap: ATA channel to examine
731 * @device: Device to examine (starting at zero)
732 *
733 * This technique was originally described in
734 * Hale Landis's ATADRVR (www.ata-atapi.com), and
735 * later found its way into the ATA/ATAPI spec.
736 *
737 * Write a pattern to the ATA shadow registers,
738 * and if a device is present, it will respond by
739 * correctly storing and echoing back the
740 * ATA shadow register contents.
741 *
742 * LOCKING:
743 * caller.
744 */
745
746static unsigned int ata_mmio_devchk(struct ata_port *ap,
747 unsigned int device)
748{
749 struct ata_ioports *ioaddr = &ap->ioaddr;
750 u8 nsect, lbal;
751
752 ap->ops->dev_select(ap, device);
753
754 writeb(0x55, (void __iomem *) ioaddr->nsect_addr);
755 writeb(0xaa, (void __iomem *) ioaddr->lbal_addr);
756
757 writeb(0xaa, (void __iomem *) ioaddr->nsect_addr);
758 writeb(0x55, (void __iomem *) ioaddr->lbal_addr);
759
760 writeb(0x55, (void __iomem *) ioaddr->nsect_addr);
761 writeb(0xaa, (void __iomem *) ioaddr->lbal_addr);
762
763 nsect = readb((void __iomem *) ioaddr->nsect_addr);
764 lbal = readb((void __iomem *) ioaddr->lbal_addr);
765
766 if ((nsect == 0x55) && (lbal == 0xaa))
767 return 1; /* we found a device */
768
769 return 0; /* nothing found */
770}
771
772/**
773 * ata_devchk - PATA device presence detection
774 * @ap: ATA channel to examine
775 * @device: Device to examine (starting at zero)
776 *
777 * Dispatch ATA device presence detection, depending
778 * on whether we are using PIO or MMIO to talk to the
779 * ATA shadow registers.
780 *
781 * LOCKING:
782 * caller.
783 */
784
785static unsigned int ata_devchk(struct ata_port *ap,
786 unsigned int device)
787{
788 if (ap->flags & ATA_FLAG_MMIO)
789 return ata_mmio_devchk(ap, device);
790 return ata_pio_devchk(ap, device);
791}
792
793/**
794 * ata_dev_classify - determine device type based on ATA-spec signature
795 * @tf: ATA taskfile register set for device to be identified
796 *
797 * Determine from taskfile register contents whether a device is
798 * ATA or ATAPI, as per "Signature and persistence" section
799 * of ATA/PI spec (volume 1, sect 5.14).
800 *
801 * LOCKING:
802 * None.
803 *
804 * RETURNS:
805 * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, or %ATA_DEV_UNKNOWN
806 * the event of failure.
807 */
808
Jeff Garzik057ace52005-10-22 14:27:05 -0400809unsigned int ata_dev_classify(const struct ata_taskfile *tf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700810{
811 /* Apple's open source Darwin code hints that some devices only
812 * put a proper signature into the LBA mid/high registers,
813 * So, we only check those. It's sufficient for uniqueness.
814 */
815
816 if (((tf->lbam == 0) && (tf->lbah == 0)) ||
817 ((tf->lbam == 0x3c) && (tf->lbah == 0xc3))) {
818 DPRINTK("found ATA device by sig\n");
819 return ATA_DEV_ATA;
820 }
821
822 if (((tf->lbam == 0x14) && (tf->lbah == 0xeb)) ||
823 ((tf->lbam == 0x69) && (tf->lbah == 0x96))) {
824 DPRINTK("found ATAPI device by sig\n");
825 return ATA_DEV_ATAPI;
826 }
827
828 DPRINTK("unknown device\n");
829 return ATA_DEV_UNKNOWN;
830}
831
832/**
833 * ata_dev_try_classify - Parse returned ATA device signature
834 * @ap: ATA channel to examine
835 * @device: Device to examine (starting at zero)
836 *
837 * After an event -- SRST, E.D.D., or SATA COMRESET -- occurs,
838 * an ATA/ATAPI-defined set of values is placed in the ATA
839 * shadow registers, indicating the results of device detection
840 * and diagnostics.
841 *
842 * Select the ATA device, and read the values from the ATA shadow
843 * registers. Then parse according to the Error register value,
844 * and the spec-defined values examined by ata_dev_classify().
845 *
846 * LOCKING:
847 * caller.
848 */
849
850static u8 ata_dev_try_classify(struct ata_port *ap, unsigned int device)
851{
852 struct ata_device *dev = &ap->device[device];
853 struct ata_taskfile tf;
854 unsigned int class;
855 u8 err;
856
857 ap->ops->dev_select(ap, device);
858
859 memset(&tf, 0, sizeof(tf));
860
Linus Torvalds1da177e2005-04-16 15:20:36 -0700861 ap->ops->tf_read(ap, &tf);
Jeff Garzik0169e282005-10-29 21:25:10 -0400862 err = tf.feature;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700863
864 dev->class = ATA_DEV_NONE;
865
866 /* see if device passed diags */
867 if (err == 1)
868 /* do nothing */ ;
869 else if ((device == 0) && (err == 0x81))
870 /* do nothing */ ;
871 else
872 return err;
873
874 /* determine if device if ATA or ATAPI */
875 class = ata_dev_classify(&tf);
876 if (class == ATA_DEV_UNKNOWN)
877 return err;
878 if ((class == ATA_DEV_ATA) && (ata_chk_status(ap) == 0))
879 return err;
880
881 dev->class = class;
882
883 return err;
884}
885
886/**
887 * ata_dev_id_string - Convert IDENTIFY DEVICE page into string
888 * @id: IDENTIFY DEVICE results we will examine
889 * @s: string into which data is output
890 * @ofs: offset into identify device page
891 * @len: length of string to return. must be an even number.
892 *
893 * The strings in the IDENTIFY DEVICE page are broken up into
894 * 16-bit chunks. Run through the string, and output each
895 * 8-bit chunk linearly, regardless of platform.
896 *
897 * LOCKING:
898 * caller.
899 */
900
Jeff Garzik057ace52005-10-22 14:27:05 -0400901void ata_dev_id_string(const u16 *id, unsigned char *s,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700902 unsigned int ofs, unsigned int len)
903{
904 unsigned int c;
905
906 while (len > 0) {
907 c = id[ofs] >> 8;
908 *s = c;
909 s++;
910
911 c = id[ofs] & 0xff;
912 *s = c;
913 s++;
914
915 ofs++;
916 len -= 2;
917 }
918}
919
Edward Falk0baab862005-06-02 18:17:13 -0400920
921/**
922 * ata_noop_dev_select - Select device 0/1 on ATA bus
923 * @ap: ATA channel to manipulate
924 * @device: ATA device (numbered from zero) to select
925 *
926 * This function performs no actual function.
927 *
928 * May be used as the dev_select() entry in ata_port_operations.
929 *
930 * LOCKING:
931 * caller.
932 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700933void ata_noop_dev_select (struct ata_port *ap, unsigned int device)
934{
935}
936
Edward Falk0baab862005-06-02 18:17:13 -0400937
Linus Torvalds1da177e2005-04-16 15:20:36 -0700938/**
939 * ata_std_dev_select - Select device 0/1 on ATA bus
940 * @ap: ATA channel to manipulate
941 * @device: ATA device (numbered from zero) to select
942 *
943 * Use the method defined in the ATA specification to
944 * make either device 0, or device 1, active on the
Edward Falk0baab862005-06-02 18:17:13 -0400945 * ATA channel. Works with both PIO and MMIO.
946 *
947 * May be used as the dev_select() entry in ata_port_operations.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700948 *
949 * LOCKING:
950 * caller.
951 */
952
953void ata_std_dev_select (struct ata_port *ap, unsigned int device)
954{
955 u8 tmp;
956
957 if (device == 0)
958 tmp = ATA_DEVICE_OBS;
959 else
960 tmp = ATA_DEVICE_OBS | ATA_DEV1;
961
962 if (ap->flags & ATA_FLAG_MMIO) {
963 writeb(tmp, (void __iomem *) ap->ioaddr.device_addr);
964 } else {
965 outb(tmp, ap->ioaddr.device_addr);
966 }
967 ata_pause(ap); /* needed; also flushes, for mmio */
968}
969
970/**
971 * ata_dev_select - Select device 0/1 on ATA bus
972 * @ap: ATA channel to manipulate
973 * @device: ATA device (numbered from zero) to select
974 * @wait: non-zero to wait for Status register BSY bit to clear
975 * @can_sleep: non-zero if context allows sleeping
976 *
977 * Use the method defined in the ATA specification to
978 * make either device 0, or device 1, active on the
979 * ATA channel.
980 *
981 * This is a high-level version of ata_std_dev_select(),
982 * which additionally provides the services of inserting
983 * the proper pauses and status polling, where needed.
984 *
985 * LOCKING:
986 * caller.
987 */
988
989void ata_dev_select(struct ata_port *ap, unsigned int device,
990 unsigned int wait, unsigned int can_sleep)
991{
992 VPRINTK("ENTER, ata%u: device %u, wait %u\n",
993 ap->id, device, wait);
994
995 if (wait)
996 ata_wait_idle(ap);
997
998 ap->ops->dev_select(ap, device);
999
1000 if (wait) {
1001 if (can_sleep && ap->device[device].class == ATA_DEV_ATAPI)
1002 msleep(150);
1003 ata_wait_idle(ap);
1004 }
1005}
1006
1007/**
1008 * ata_dump_id - IDENTIFY DEVICE info debugging output
1009 * @dev: Device whose IDENTIFY DEVICE page we will dump
1010 *
1011 * Dump selected 16-bit words from a detected device's
1012 * IDENTIFY PAGE page.
1013 *
1014 * LOCKING:
1015 * caller.
1016 */
1017
Jeff Garzik057ace52005-10-22 14:27:05 -04001018static inline void ata_dump_id(const struct ata_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001019{
1020 DPRINTK("49==0x%04x "
1021 "53==0x%04x "
1022 "63==0x%04x "
1023 "64==0x%04x "
1024 "75==0x%04x \n",
1025 dev->id[49],
1026 dev->id[53],
1027 dev->id[63],
1028 dev->id[64],
1029 dev->id[75]);
1030 DPRINTK("80==0x%04x "
1031 "81==0x%04x "
1032 "82==0x%04x "
1033 "83==0x%04x "
1034 "84==0x%04x \n",
1035 dev->id[80],
1036 dev->id[81],
1037 dev->id[82],
1038 dev->id[83],
1039 dev->id[84]);
1040 DPRINTK("88==0x%04x "
1041 "93==0x%04x\n",
1042 dev->id[88],
1043 dev->id[93]);
1044}
1045
Alan Cox11e29e22005-10-21 18:46:32 -04001046/*
1047 * Compute the PIO modes available for this device. This is not as
1048 * trivial as it seems if we must consider early devices correctly.
1049 *
1050 * FIXME: pre IDE drive timing (do we care ?).
1051 */
1052
Jeff Garzik057ace52005-10-22 14:27:05 -04001053static unsigned int ata_pio_modes(const struct ata_device *adev)
Alan Cox11e29e22005-10-21 18:46:32 -04001054{
1055 u16 modes;
1056
Alan Coxffa29452006-01-09 17:14:40 +00001057 /* Usual case. Word 53 indicates word 64 is valid */
1058 if (adev->id[ATA_ID_FIELD_VALID] & (1 << 1)) {
Alan Cox11e29e22005-10-21 18:46:32 -04001059 modes = adev->id[ATA_ID_PIO_MODES] & 0x03;
1060 modes <<= 3;
1061 modes |= 0x7;
1062 return modes;
1063 }
1064
Alan Coxffa29452006-01-09 17:14:40 +00001065 /* If word 64 isn't valid then Word 51 high byte holds the PIO timing
1066 number for the maximum. Turn it into a mask and return it */
1067 modes = (2 << ((adev->id[ATA_ID_OLD_PIO_MODES] >> 8) & 0xFF)) - 1 ;
Alan Cox11e29e22005-10-21 18:46:32 -04001068 return modes;
Alan Coxffa29452006-01-09 17:14:40 +00001069 /* But wait.. there's more. Design your standards by committee and
1070 you too can get a free iordy field to process. However its the
1071 speeds not the modes that are supported... Note drivers using the
1072 timing API will get this right anyway */
Alan Cox11e29e22005-10-21 18:46:32 -04001073}
1074
Tejun Heo95064372006-01-23 13:09:37 +09001075static inline void
1076ata_queue_packet_task(struct ata_port *ap)
1077{
1078 queue_work(ata_wq, &ap->packet_task);
1079}
1080
1081static inline void
1082ata_queue_pio_task(struct ata_port *ap)
1083{
1084 queue_work(ata_wq, &ap->pio_task);
1085}
1086
1087static inline void
1088ata_queue_delayed_pio_task(struct ata_port *ap, unsigned long delay)
1089{
1090 queue_delayed_work(ata_wq, &ap->pio_task, delay);
1091}
1092
Tejun Heo77853bf2006-01-23 13:09:36 +09001093void ata_qc_complete_internal(struct ata_queued_cmd *qc)
Tejun Heoa2a7a662005-12-13 14:48:31 +09001094{
Tejun Heo77853bf2006-01-23 13:09:36 +09001095 struct completion *waiting = qc->private_data;
Tejun Heoa2a7a662005-12-13 14:48:31 +09001096
Tejun Heo77853bf2006-01-23 13:09:36 +09001097 qc->ap->ops->tf_read(qc->ap, &qc->tf);
Tejun Heoa2a7a662005-12-13 14:48:31 +09001098 complete(waiting);
Tejun Heoa2a7a662005-12-13 14:48:31 +09001099}
1100
1101/**
1102 * ata_exec_internal - execute libata internal command
1103 * @ap: Port to which the command is sent
1104 * @dev: Device to which the command is sent
1105 * @tf: Taskfile registers for the command and the result
1106 * @dma_dir: Data tranfer direction of the command
1107 * @buf: Data buffer of the command
1108 * @buflen: Length of data buffer
1109 *
1110 * Executes libata internal command with timeout. @tf contains
1111 * command on entry and result on return. Timeout and error
1112 * conditions are reported via return value. No recovery action
1113 * is taken after a command times out. It's caller's duty to
1114 * clean up after timeout.
1115 *
1116 * LOCKING:
1117 * None. Should be called with kernel context, might sleep.
1118 */
1119
1120static unsigned
1121ata_exec_internal(struct ata_port *ap, struct ata_device *dev,
1122 struct ata_taskfile *tf,
1123 int dma_dir, void *buf, unsigned int buflen)
1124{
1125 u8 command = tf->command;
1126 struct ata_queued_cmd *qc;
1127 DECLARE_COMPLETION(wait);
1128 unsigned long flags;
Tejun Heo77853bf2006-01-23 13:09:36 +09001129 unsigned int err_mask;
Tejun Heoa2a7a662005-12-13 14:48:31 +09001130
1131 spin_lock_irqsave(&ap->host_set->lock, flags);
1132
1133 qc = ata_qc_new_init(ap, dev);
1134 BUG_ON(qc == NULL);
1135
1136 qc->tf = *tf;
1137 qc->dma_dir = dma_dir;
1138 if (dma_dir != DMA_NONE) {
1139 ata_sg_init_one(qc, buf, buflen);
1140 qc->nsect = buflen / ATA_SECT_SIZE;
1141 }
1142
Tejun Heo77853bf2006-01-23 13:09:36 +09001143 qc->private_data = &wait;
Tejun Heoa2a7a662005-12-13 14:48:31 +09001144 qc->complete_fn = ata_qc_complete_internal;
1145
Tejun Heo9a3d9eb2006-01-23 13:09:36 +09001146 qc->err_mask = ata_qc_issue(qc);
1147 if (qc->err_mask)
Tejun Heo8e436af2006-01-23 13:09:36 +09001148 ata_qc_complete(qc);
Tejun Heoa2a7a662005-12-13 14:48:31 +09001149
1150 spin_unlock_irqrestore(&ap->host_set->lock, flags);
1151
1152 if (!wait_for_completion_timeout(&wait, ATA_TMOUT_INTERNAL)) {
1153 spin_lock_irqsave(&ap->host_set->lock, flags);
1154
1155 /* We're racing with irq here. If we lose, the
1156 * following test prevents us from completing the qc
1157 * again. If completion irq occurs after here but
1158 * before the caller cleans up, it will result in a
1159 * spurious interrupt. We can live with that.
1160 */
Tejun Heo77853bf2006-01-23 13:09:36 +09001161 if (qc->flags & ATA_QCFLAG_ACTIVE) {
Tejun Heo11a56d22006-01-23 13:09:36 +09001162 qc->err_mask = AC_ERR_TIMEOUT;
Tejun Heoa2a7a662005-12-13 14:48:31 +09001163 ata_qc_complete(qc);
1164 printk(KERN_WARNING "ata%u: qc timeout (cmd 0x%x)\n",
1165 ap->id, command);
1166 }
1167
1168 spin_unlock_irqrestore(&ap->host_set->lock, flags);
1169 }
1170
Tejun Heo77853bf2006-01-23 13:09:36 +09001171 *tf = qc->tf;
1172 err_mask = qc->err_mask;
1173
1174 ata_qc_free(qc);
1175
1176 return err_mask;
Tejun Heoa2a7a662005-12-13 14:48:31 +09001177}
1178
Linus Torvalds1da177e2005-04-16 15:20:36 -07001179/**
Alan Cox1bc4ccf2006-01-09 17:18:14 +00001180 * ata_pio_need_iordy - check if iordy needed
1181 * @adev: ATA device
1182 *
1183 * Check if the current speed of the device requires IORDY. Used
1184 * by various controllers for chip configuration.
1185 */
1186
1187unsigned int ata_pio_need_iordy(const struct ata_device *adev)
1188{
1189 int pio;
1190 int speed = adev->pio_mode - XFER_PIO_0;
1191
1192 if (speed < 2)
1193 return 0;
1194 if (speed > 2)
1195 return 1;
1196
1197 /* If we have no drive specific rule, then PIO 2 is non IORDY */
1198
1199 if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE */
1200 pio = adev->id[ATA_ID_EIDE_PIO];
1201 /* Is the speed faster than the drive allows non IORDY ? */
1202 if (pio) {
1203 /* This is cycle times not frequency - watch the logic! */
1204 if (pio > 240) /* PIO2 is 240nS per cycle */
1205 return 1;
1206 return 0;
1207 }
1208 }
1209 return 0;
1210}
1211
1212/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07001213 * ata_dev_identify - obtain IDENTIFY x DEVICE page
1214 * @ap: port on which device we wish to probe resides
1215 * @device: device bus address, starting at zero
1216 *
1217 * Following bus reset, we issue the IDENTIFY [PACKET] DEVICE
1218 * command, and read back the 512-byte device information page.
1219 * The device information page is fed to us via the standard
1220 * PIO-IN protocol, but we hand-code it here. (TODO: investigate
1221 * using standard PIO-IN paths)
1222 *
1223 * After reading the device information page, we use several
1224 * bits of information from it to initialize data structures
1225 * that will be used during the lifetime of the ata_device.
1226 * Other data from the info page is used to disqualify certain
1227 * older ATA devices we do not wish to support.
1228 *
1229 * LOCKING:
1230 * Inherited from caller. Some functions called by this function
1231 * obtain the host_set lock.
1232 */
1233
1234static void ata_dev_identify(struct ata_port *ap, unsigned int device)
1235{
1236 struct ata_device *dev = &ap->device[device];
Albert Lee8bf62ece2005-05-12 15:29:42 -04001237 unsigned int major_version;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001238 u16 tmp;
1239 unsigned long xfer_modes;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001240 unsigned int using_edd;
Tejun Heoa0123702005-12-13 14:49:31 +09001241 struct ata_taskfile tf;
1242 unsigned int err_mask;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001243 int rc;
1244
1245 if (!ata_dev_present(dev)) {
1246 DPRINTK("ENTER/EXIT (host %u, dev %u) -- nodev\n",
1247 ap->id, device);
1248 return;
1249 }
1250
1251 if (ap->flags & (ATA_FLAG_SRST | ATA_FLAG_SATA_RESET))
1252 using_edd = 0;
1253 else
1254 using_edd = 1;
1255
1256 DPRINTK("ENTER, host %u, dev %u\n", ap->id, device);
1257
1258 assert (dev->class == ATA_DEV_ATA || dev->class == ATA_DEV_ATAPI ||
1259 dev->class == ATA_DEV_NONE);
1260
1261 ata_dev_select(ap, device, 1, 1); /* select device 0/1 */
1262
Linus Torvalds1da177e2005-04-16 15:20:36 -07001263retry:
Tejun Heoa0123702005-12-13 14:49:31 +09001264 ata_tf_init(ap, &tf, device);
1265
Linus Torvalds1da177e2005-04-16 15:20:36 -07001266 if (dev->class == ATA_DEV_ATA) {
Tejun Heoa0123702005-12-13 14:49:31 +09001267 tf.command = ATA_CMD_ID_ATA;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001268 DPRINTK("do ATA identify\n");
1269 } else {
Tejun Heoa0123702005-12-13 14:49:31 +09001270 tf.command = ATA_CMD_ID_ATAPI;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001271 DPRINTK("do ATAPI identify\n");
1272 }
1273
Tejun Heoa0123702005-12-13 14:49:31 +09001274 tf.protocol = ATA_PROT_PIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001275
Tejun Heoa0123702005-12-13 14:49:31 +09001276 err_mask = ata_exec_internal(ap, dev, &tf, DMA_FROM_DEVICE,
1277 dev->id, sizeof(dev->id));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001278
Tejun Heoa0123702005-12-13 14:49:31 +09001279 if (err_mask) {
1280 if (err_mask & ~AC_ERR_DEV)
1281 goto err_out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001282
Linus Torvalds1da177e2005-04-16 15:20:36 -07001283 /*
1284 * arg! EDD works for all test cases, but seems to return
1285 * the ATA signature for some ATAPI devices. Until the
1286 * reason for this is found and fixed, we fix up the mess
1287 * here. If IDENTIFY DEVICE returns command aborted
1288 * (as ATAPI devices do), then we issue an
1289 * IDENTIFY PACKET DEVICE.
1290 *
1291 * ATA software reset (SRST, the default) does not appear
1292 * to have this problem.
1293 */
Albert Lee7c398332005-11-09 13:03:30 +08001294 if ((using_edd) && (dev->class == ATA_DEV_ATA)) {
Tejun Heoa0123702005-12-13 14:49:31 +09001295 u8 err = tf.feature;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001296 if (err & ATA_ABORTED) {
1297 dev->class = ATA_DEV_ATAPI;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001298 goto retry;
1299 }
1300 }
1301 goto err_out;
1302 }
1303
1304 swap_buf_le16(dev->id, ATA_ID_WORDS);
1305
1306 /* print device capabilities */
1307 printk(KERN_DEBUG "ata%u: dev %u cfg "
1308 "49:%04x 82:%04x 83:%04x 84:%04x 85:%04x 86:%04x 87:%04x 88:%04x\n",
1309 ap->id, device, dev->id[49],
1310 dev->id[82], dev->id[83], dev->id[84],
1311 dev->id[85], dev->id[86], dev->id[87],
1312 dev->id[88]);
1313
1314 /*
1315 * common ATA, ATAPI feature tests
1316 */
1317
Albert Lee8bf62ece2005-05-12 15:29:42 -04001318 /* we require DMA support (bits 8 of word 49) */
1319 if (!ata_id_has_dma(dev->id)) {
1320 printk(KERN_DEBUG "ata%u: no dma\n", ap->id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001321 goto err_out_nosup;
1322 }
1323
1324 /* quick-n-dirty find max transfer mode; for printk only */
1325 xfer_modes = dev->id[ATA_ID_UDMA_MODES];
1326 if (!xfer_modes)
1327 xfer_modes = (dev->id[ATA_ID_MWDMA_MODES]) << ATA_SHIFT_MWDMA;
Alan Cox11e29e22005-10-21 18:46:32 -04001328 if (!xfer_modes)
1329 xfer_modes = ata_pio_modes(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001330
1331 ata_dump_id(dev);
1332
1333 /* ATA-specific feature tests */
1334 if (dev->class == ATA_DEV_ATA) {
1335 if (!ata_id_is_ata(dev->id)) /* sanity check */
1336 goto err_out_nosup;
1337
Albert Lee8bf62ece2005-05-12 15:29:42 -04001338 /* get major version */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001339 tmp = dev->id[ATA_ID_MAJOR_VER];
Albert Lee8bf62ece2005-05-12 15:29:42 -04001340 for (major_version = 14; major_version >= 1; major_version--)
1341 if (tmp & (1 << major_version))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001342 break;
1343
Albert Lee8bf62ece2005-05-12 15:29:42 -04001344 /*
1345 * The exact sequence expected by certain pre-ATA4 drives is:
1346 * SRST RESET
1347 * IDENTIFY
1348 * INITIALIZE DEVICE PARAMETERS
1349 * anything else..
1350 * Some drives were very specific about that exact sequence.
1351 */
Albert Lee59a10b12005-10-12 15:09:42 +08001352 if (major_version < 4 || (!ata_id_has_lba(dev->id))) {
Albert Lee8bf62ece2005-05-12 15:29:42 -04001353 ata_dev_init_params(ap, dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001354
Albert Lee59a10b12005-10-12 15:09:42 +08001355 /* current CHS translation info (id[53-58]) might be
1356 * changed. reread the identify device info.
1357 */
1358 ata_dev_reread_id(ap, dev);
1359 }
1360
Albert Lee8bf62ece2005-05-12 15:29:42 -04001361 if (ata_id_has_lba(dev->id)) {
1362 dev->flags |= ATA_DFLAG_LBA;
1363
1364 if (ata_id_has_lba48(dev->id)) {
1365 dev->flags |= ATA_DFLAG_LBA48;
1366 dev->n_sectors = ata_id_u64(dev->id, 100);
1367 } else {
1368 dev->n_sectors = ata_id_u32(dev->id, 60);
1369 }
1370
1371 /* print device info to dmesg */
1372 printk(KERN_INFO "ata%u: dev %u ATA-%d, max %s, %Lu sectors:%s\n",
1373 ap->id, device,
1374 major_version,
1375 ata_mode_string(xfer_modes),
1376 (unsigned long long)dev->n_sectors,
1377 dev->flags & ATA_DFLAG_LBA48 ? " LBA48" : " LBA");
1378 } else {
1379 /* CHS */
1380
1381 /* Default translation */
1382 dev->cylinders = dev->id[1];
1383 dev->heads = dev->id[3];
1384 dev->sectors = dev->id[6];
1385 dev->n_sectors = dev->cylinders * dev->heads * dev->sectors;
1386
1387 if (ata_id_current_chs_valid(dev->id)) {
1388 /* Current CHS translation is valid. */
1389 dev->cylinders = dev->id[54];
1390 dev->heads = dev->id[55];
1391 dev->sectors = dev->id[56];
1392
1393 dev->n_sectors = ata_id_u32(dev->id, 57);
1394 }
1395
1396 /* print device info to dmesg */
1397 printk(KERN_INFO "ata%u: dev %u ATA-%d, max %s, %Lu sectors: CHS %d/%d/%d\n",
1398 ap->id, device,
1399 major_version,
1400 ata_mode_string(xfer_modes),
1401 (unsigned long long)dev->n_sectors,
1402 (int)dev->cylinders, (int)dev->heads, (int)dev->sectors);
1403
Linus Torvalds1da177e2005-04-16 15:20:36 -07001404 }
1405
1406 ap->host->max_cmd_len = 16;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001407 }
1408
1409 /* ATAPI-specific feature tests */
Jeff Garzik2c13b7c2005-11-14 14:14:16 -05001410 else if (dev->class == ATA_DEV_ATAPI) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001411 if (ata_id_is_ata(dev->id)) /* sanity check */
1412 goto err_out_nosup;
1413
1414 rc = atapi_cdb_len(dev->id);
1415 if ((rc < 12) || (rc > ATAPI_CDB_LEN)) {
1416 printk(KERN_WARNING "ata%u: unsupported CDB len\n", ap->id);
1417 goto err_out_nosup;
1418 }
1419 ap->cdb_len = (unsigned int) rc;
1420 ap->host->max_cmd_len = (unsigned char) ap->cdb_len;
1421
1422 /* print device info to dmesg */
1423 printk(KERN_INFO "ata%u: dev %u ATAPI, max %s\n",
1424 ap->id, device,
1425 ata_mode_string(xfer_modes));
1426 }
1427
1428 DPRINTK("EXIT, drv_stat = 0x%x\n", ata_chk_status(ap));
1429 return;
1430
1431err_out_nosup:
1432 printk(KERN_WARNING "ata%u: dev %u not supported, ignoring\n",
1433 ap->id, device);
1434err_out:
1435 dev->class++; /* converts ATA_DEV_xxx into ATA_DEV_xxx_UNSUP */
1436 DPRINTK("EXIT, err\n");
1437}
1438
Brad Campbell6f2f3812005-05-12 15:07:47 -04001439
Jeff Garzik057ace52005-10-22 14:27:05 -04001440static inline u8 ata_dev_knobble(const struct ata_port *ap)
Brad Campbell6f2f3812005-05-12 15:07:47 -04001441{
1442 return ((ap->cbl == ATA_CBL_SATA) && (!ata_id_is_sata(ap->device->id)));
1443}
1444
1445/**
1446 * ata_dev_config - Run device specific handlers and check for
1447 * SATA->PATA bridges
Jeff Garzik8a60a072005-07-31 13:13:24 -04001448 * @ap: Bus
Brad Campbell6f2f3812005-05-12 15:07:47 -04001449 * @i: Device
1450 *
1451 * LOCKING:
1452 */
Jeff Garzik8a60a072005-07-31 13:13:24 -04001453
Brad Campbell6f2f3812005-05-12 15:07:47 -04001454void ata_dev_config(struct ata_port *ap, unsigned int i)
1455{
1456 /* limit bridge transfers to udma5, 200 sectors */
1457 if (ata_dev_knobble(ap)) {
1458 printk(KERN_INFO "ata%u(%u): applying bridge limits\n",
1459 ap->id, ap->device->devno);
1460 ap->udma_mask &= ATA_UDMA5;
1461 ap->host->max_sectors = ATA_MAX_SECTORS;
1462 ap->host->hostt->max_sectors = ATA_MAX_SECTORS;
Alan Cox9d824d02006-01-17 20:51:55 +00001463 ap->device[i].flags |= ATA_DFLAG_LOCK_SECTORS;
Brad Campbell6f2f3812005-05-12 15:07:47 -04001464 }
1465
1466 if (ap->ops->dev_config)
1467 ap->ops->dev_config(ap, &ap->device[i]);
1468}
1469
Linus Torvalds1da177e2005-04-16 15:20:36 -07001470/**
1471 * ata_bus_probe - Reset and probe ATA bus
1472 * @ap: Bus to probe
1473 *
Jeff Garzik0cba6322005-05-30 19:49:12 -04001474 * Master ATA bus probing function. Initiates a hardware-dependent
1475 * bus reset, then attempts to identify any devices found on
1476 * the bus.
1477 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07001478 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04001479 * PCI/etc. bus probe sem.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001480 *
1481 * RETURNS:
1482 * Zero on success, non-zero on error.
1483 */
1484
1485static int ata_bus_probe(struct ata_port *ap)
1486{
1487 unsigned int i, found = 0;
1488
1489 ap->ops->phy_reset(ap);
1490 if (ap->flags & ATA_FLAG_PORT_DISABLED)
1491 goto err_out;
1492
1493 for (i = 0; i < ATA_MAX_DEVICES; i++) {
1494 ata_dev_identify(ap, i);
1495 if (ata_dev_present(&ap->device[i])) {
1496 found = 1;
Brad Campbell6f2f3812005-05-12 15:07:47 -04001497 ata_dev_config(ap,i);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001498 }
1499 }
1500
1501 if ((!found) || (ap->flags & ATA_FLAG_PORT_DISABLED))
1502 goto err_out_disable;
1503
1504 ata_set_mode(ap);
1505 if (ap->flags & ATA_FLAG_PORT_DISABLED)
1506 goto err_out_disable;
1507
1508 return 0;
1509
1510err_out_disable:
1511 ap->ops->port_disable(ap);
1512err_out:
1513 return -1;
1514}
1515
1516/**
Jeff Garzik0cba6322005-05-30 19:49:12 -04001517 * ata_port_probe - Mark port as enabled
1518 * @ap: Port for which we indicate enablement
Linus Torvalds1da177e2005-04-16 15:20:36 -07001519 *
Jeff Garzik0cba6322005-05-30 19:49:12 -04001520 * Modify @ap data structure such that the system
1521 * thinks that the entire port is enabled.
1522 *
1523 * LOCKING: host_set lock, or some other form of
1524 * serialization.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001525 */
1526
1527void ata_port_probe(struct ata_port *ap)
1528{
1529 ap->flags &= ~ATA_FLAG_PORT_DISABLED;
1530}
1531
1532/**
Tejun Heo3be680b2005-12-19 22:35:02 +09001533 * sata_print_link_status - Print SATA link status
1534 * @ap: SATA port to printk link status about
1535 *
1536 * This function prints link speed and status of a SATA link.
1537 *
1538 * LOCKING:
1539 * None.
1540 */
1541static void sata_print_link_status(struct ata_port *ap)
1542{
1543 u32 sstatus, tmp;
1544 const char *speed;
1545
1546 if (!ap->ops->scr_read)
1547 return;
1548
1549 sstatus = scr_read(ap, SCR_STATUS);
1550
1551 if (sata_dev_present(ap)) {
1552 tmp = (sstatus >> 4) & 0xf;
1553 if (tmp & (1 << 0))
1554 speed = "1.5";
1555 else if (tmp & (1 << 1))
1556 speed = "3.0";
1557 else
1558 speed = "<unknown>";
1559 printk(KERN_INFO "ata%u: SATA link up %s Gbps (SStatus %X)\n",
1560 ap->id, speed, sstatus);
1561 } else {
1562 printk(KERN_INFO "ata%u: SATA link down (SStatus %X)\n",
1563 ap->id, sstatus);
1564 }
1565}
1566
1567/**
Jeff Garzik780a87f2005-05-30 15:41:05 -04001568 * __sata_phy_reset - Wake/reset a low-level SATA PHY
1569 * @ap: SATA port associated with target SATA PHY.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001570 *
Jeff Garzik780a87f2005-05-30 15:41:05 -04001571 * This function issues commands to standard SATA Sxxx
1572 * PHY registers, to wake up the phy (and device), and
1573 * clear any reset condition.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001574 *
1575 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04001576 * PCI/etc. bus probe sem.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001577 *
1578 */
1579void __sata_phy_reset(struct ata_port *ap)
1580{
1581 u32 sstatus;
1582 unsigned long timeout = jiffies + (HZ * 5);
1583
1584 if (ap->flags & ATA_FLAG_SATA_RESET) {
Brett Russcdcca89e2005-03-28 15:10:27 -05001585 /* issue phy wake/reset */
1586 scr_write_flush(ap, SCR_CONTROL, 0x301);
Tejun Heo62ba2842005-06-26 23:27:19 +09001587 /* Couldn't find anything in SATA I/II specs, but
1588 * AHCI-1.1 10.4.2 says at least 1 ms. */
1589 mdelay(1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001590 }
Brett Russcdcca89e2005-03-28 15:10:27 -05001591 scr_write_flush(ap, SCR_CONTROL, 0x300); /* phy wake/clear reset */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001592
1593 /* wait for phy to become ready, if necessary */
1594 do {
1595 msleep(200);
1596 sstatus = scr_read(ap, SCR_STATUS);
1597 if ((sstatus & 0xf) != 1)
1598 break;
1599 } while (time_before(jiffies, timeout));
1600
Tejun Heo3be680b2005-12-19 22:35:02 +09001601 /* print link status */
1602 sata_print_link_status(ap);
Jeff Garzik656563e2005-11-20 03:36:45 -05001603
Tejun Heo3be680b2005-12-19 22:35:02 +09001604 /* TODO: phy layer with polling, timeouts, etc. */
1605 if (sata_dev_present(ap))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001606 ata_port_probe(ap);
Tejun Heo3be680b2005-12-19 22:35:02 +09001607 else
Linus Torvalds1da177e2005-04-16 15:20:36 -07001608 ata_port_disable(ap);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001609
1610 if (ap->flags & ATA_FLAG_PORT_DISABLED)
1611 return;
1612
1613 if (ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT)) {
1614 ata_port_disable(ap);
1615 return;
1616 }
1617
1618 ap->cbl = ATA_CBL_SATA;
1619}
1620
1621/**
Jeff Garzik780a87f2005-05-30 15:41:05 -04001622 * sata_phy_reset - Reset SATA bus.
1623 * @ap: SATA port associated with target SATA PHY.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001624 *
Jeff Garzik780a87f2005-05-30 15:41:05 -04001625 * This function resets the SATA bus, and then probes
1626 * the bus for devices.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001627 *
1628 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04001629 * PCI/etc. bus probe sem.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001630 *
1631 */
1632void sata_phy_reset(struct ata_port *ap)
1633{
1634 __sata_phy_reset(ap);
1635 if (ap->flags & ATA_FLAG_PORT_DISABLED)
1636 return;
1637 ata_bus_reset(ap);
1638}
1639
1640/**
Jeff Garzik780a87f2005-05-30 15:41:05 -04001641 * ata_port_disable - Disable port.
1642 * @ap: Port to be disabled.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001643 *
Jeff Garzik780a87f2005-05-30 15:41:05 -04001644 * Modify @ap data structure such that the system
1645 * thinks that the entire port is disabled, and should
1646 * never attempt to probe or communicate with devices
1647 * on this port.
1648 *
1649 * LOCKING: host_set lock, or some other form of
1650 * serialization.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001651 */
1652
1653void ata_port_disable(struct ata_port *ap)
1654{
1655 ap->device[0].class = ATA_DEV_NONE;
1656 ap->device[1].class = ATA_DEV_NONE;
1657 ap->flags |= ATA_FLAG_PORT_DISABLED;
1658}
1659
Alan Cox452503f2005-10-21 19:01:32 -04001660/*
1661 * This mode timing computation functionality is ported over from
1662 * drivers/ide/ide-timing.h and was originally written by Vojtech Pavlik
1663 */
1664/*
1665 * PIO 0-5, MWDMA 0-2 and UDMA 0-6 timings (in nanoseconds).
1666 * These were taken from ATA/ATAPI-6 standard, rev 0a, except
1667 * for PIO 5, which is a nonstandard extension and UDMA6, which
1668 * is currently supported only by Maxtor drives.
1669 */
1670
1671static const struct ata_timing ata_timing[] = {
1672
1673 { XFER_UDMA_6, 0, 0, 0, 0, 0, 0, 0, 15 },
1674 { XFER_UDMA_5, 0, 0, 0, 0, 0, 0, 0, 20 },
1675 { XFER_UDMA_4, 0, 0, 0, 0, 0, 0, 0, 30 },
1676 { XFER_UDMA_3, 0, 0, 0, 0, 0, 0, 0, 45 },
1677
1678 { XFER_UDMA_2, 0, 0, 0, 0, 0, 0, 0, 60 },
1679 { XFER_UDMA_1, 0, 0, 0, 0, 0, 0, 0, 80 },
1680 { XFER_UDMA_0, 0, 0, 0, 0, 0, 0, 0, 120 },
1681
1682/* { XFER_UDMA_SLOW, 0, 0, 0, 0, 0, 0, 0, 150 }, */
1683
1684 { XFER_MW_DMA_2, 25, 0, 0, 0, 70, 25, 120, 0 },
1685 { XFER_MW_DMA_1, 45, 0, 0, 0, 80, 50, 150, 0 },
1686 { XFER_MW_DMA_0, 60, 0, 0, 0, 215, 215, 480, 0 },
1687
1688 { XFER_SW_DMA_2, 60, 0, 0, 0, 120, 120, 240, 0 },
1689 { XFER_SW_DMA_1, 90, 0, 0, 0, 240, 240, 480, 0 },
1690 { XFER_SW_DMA_0, 120, 0, 0, 0, 480, 480, 960, 0 },
1691
1692/* { XFER_PIO_5, 20, 50, 30, 100, 50, 30, 100, 0 }, */
1693 { XFER_PIO_4, 25, 70, 25, 120, 70, 25, 120, 0 },
1694 { XFER_PIO_3, 30, 80, 70, 180, 80, 70, 180, 0 },
1695
1696 { XFER_PIO_2, 30, 290, 40, 330, 100, 90, 240, 0 },
1697 { XFER_PIO_1, 50, 290, 93, 383, 125, 100, 383, 0 },
1698 { XFER_PIO_0, 70, 290, 240, 600, 165, 150, 600, 0 },
1699
1700/* { XFER_PIO_SLOW, 120, 290, 240, 960, 290, 240, 960, 0 }, */
1701
1702 { 0xFF }
1703};
1704
1705#define ENOUGH(v,unit) (((v)-1)/(unit)+1)
1706#define EZ(v,unit) ((v)?ENOUGH(v,unit):0)
1707
1708static void ata_timing_quantize(const struct ata_timing *t, struct ata_timing *q, int T, int UT)
1709{
1710 q->setup = EZ(t->setup * 1000, T);
1711 q->act8b = EZ(t->act8b * 1000, T);
1712 q->rec8b = EZ(t->rec8b * 1000, T);
1713 q->cyc8b = EZ(t->cyc8b * 1000, T);
1714 q->active = EZ(t->active * 1000, T);
1715 q->recover = EZ(t->recover * 1000, T);
1716 q->cycle = EZ(t->cycle * 1000, T);
1717 q->udma = EZ(t->udma * 1000, UT);
1718}
1719
1720void ata_timing_merge(const struct ata_timing *a, const struct ata_timing *b,
1721 struct ata_timing *m, unsigned int what)
1722{
1723 if (what & ATA_TIMING_SETUP ) m->setup = max(a->setup, b->setup);
1724 if (what & ATA_TIMING_ACT8B ) m->act8b = max(a->act8b, b->act8b);
1725 if (what & ATA_TIMING_REC8B ) m->rec8b = max(a->rec8b, b->rec8b);
1726 if (what & ATA_TIMING_CYC8B ) m->cyc8b = max(a->cyc8b, b->cyc8b);
1727 if (what & ATA_TIMING_ACTIVE ) m->active = max(a->active, b->active);
1728 if (what & ATA_TIMING_RECOVER) m->recover = max(a->recover, b->recover);
1729 if (what & ATA_TIMING_CYCLE ) m->cycle = max(a->cycle, b->cycle);
1730 if (what & ATA_TIMING_UDMA ) m->udma = max(a->udma, b->udma);
1731}
1732
1733static const struct ata_timing* ata_timing_find_mode(unsigned short speed)
1734{
1735 const struct ata_timing *t;
1736
1737 for (t = ata_timing; t->mode != speed; t++)
Alan Cox91190752005-10-26 12:17:46 -04001738 if (t->mode == 0xFF)
Alan Cox452503f2005-10-21 19:01:32 -04001739 return NULL;
1740 return t;
1741}
1742
1743int ata_timing_compute(struct ata_device *adev, unsigned short speed,
1744 struct ata_timing *t, int T, int UT)
1745{
1746 const struct ata_timing *s;
1747 struct ata_timing p;
1748
1749 /*
1750 * Find the mode.
Albert Lee75b1f2f2005-11-16 17:06:18 +08001751 */
Alan Cox452503f2005-10-21 19:01:32 -04001752
1753 if (!(s = ata_timing_find_mode(speed)))
1754 return -EINVAL;
1755
Albert Lee75b1f2f2005-11-16 17:06:18 +08001756 memcpy(t, s, sizeof(*s));
1757
Alan Cox452503f2005-10-21 19:01:32 -04001758 /*
1759 * If the drive is an EIDE drive, it can tell us it needs extended
1760 * PIO/MW_DMA cycle timing.
1761 */
1762
1763 if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE drive */
1764 memset(&p, 0, sizeof(p));
1765 if(speed >= XFER_PIO_0 && speed <= XFER_SW_DMA_0) {
1766 if (speed <= XFER_PIO_2) p.cycle = p.cyc8b = adev->id[ATA_ID_EIDE_PIO];
1767 else p.cycle = p.cyc8b = adev->id[ATA_ID_EIDE_PIO_IORDY];
1768 } else if(speed >= XFER_MW_DMA_0 && speed <= XFER_MW_DMA_2) {
1769 p.cycle = adev->id[ATA_ID_EIDE_DMA_MIN];
1770 }
1771 ata_timing_merge(&p, t, t, ATA_TIMING_CYCLE | ATA_TIMING_CYC8B);
1772 }
1773
1774 /*
1775 * Convert the timing to bus clock counts.
1776 */
1777
Albert Lee75b1f2f2005-11-16 17:06:18 +08001778 ata_timing_quantize(t, t, T, UT);
Alan Cox452503f2005-10-21 19:01:32 -04001779
1780 /*
1781 * Even in DMA/UDMA modes we still use PIO access for IDENTIFY, S.M.A.R.T
1782 * and some other commands. We have to ensure that the DMA cycle timing is
1783 * slower/equal than the fastest PIO timing.
1784 */
1785
1786 if (speed > XFER_PIO_4) {
1787 ata_timing_compute(adev, adev->pio_mode, &p, T, UT);
1788 ata_timing_merge(&p, t, t, ATA_TIMING_ALL);
1789 }
1790
1791 /*
1792 * Lenghten active & recovery time so that cycle time is correct.
1793 */
1794
1795 if (t->act8b + t->rec8b < t->cyc8b) {
1796 t->act8b += (t->cyc8b - (t->act8b + t->rec8b)) / 2;
1797 t->rec8b = t->cyc8b - t->act8b;
1798 }
1799
1800 if (t->active + t->recover < t->cycle) {
1801 t->active += (t->cycle - (t->active + t->recover)) / 2;
1802 t->recover = t->cycle - t->active;
1803 }
1804
1805 return 0;
1806}
1807
Jeff Garzik057ace52005-10-22 14:27:05 -04001808static const struct {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001809 unsigned int shift;
1810 u8 base;
1811} xfer_mode_classes[] = {
1812 { ATA_SHIFT_UDMA, XFER_UDMA_0 },
1813 { ATA_SHIFT_MWDMA, XFER_MW_DMA_0 },
1814 { ATA_SHIFT_PIO, XFER_PIO_0 },
1815};
1816
Arjan van de Ven858119e2006-01-14 13:20:43 -08001817static u8 base_from_shift(unsigned int shift)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001818{
1819 int i;
1820
1821 for (i = 0; i < ARRAY_SIZE(xfer_mode_classes); i++)
1822 if (xfer_mode_classes[i].shift == shift)
1823 return xfer_mode_classes[i].base;
1824
1825 return 0xff;
1826}
1827
1828static void ata_dev_set_mode(struct ata_port *ap, struct ata_device *dev)
1829{
1830 int ofs, idx;
1831 u8 base;
1832
1833 if (!ata_dev_present(dev) || (ap->flags & ATA_FLAG_PORT_DISABLED))
1834 return;
1835
1836 if (dev->xfer_shift == ATA_SHIFT_PIO)
1837 dev->flags |= ATA_DFLAG_PIO;
1838
1839 ata_dev_set_xfermode(ap, dev);
1840
1841 base = base_from_shift(dev->xfer_shift);
1842 ofs = dev->xfer_mode - base;
1843 idx = ofs + dev->xfer_shift;
1844 WARN_ON(idx >= ARRAY_SIZE(xfer_mode_str));
1845
1846 DPRINTK("idx=%d xfer_shift=%u, xfer_mode=0x%x, base=0x%x, offset=%d\n",
1847 idx, dev->xfer_shift, (int)dev->xfer_mode, (int)base, ofs);
1848
1849 printk(KERN_INFO "ata%u: dev %u configured for %s\n",
1850 ap->id, dev->devno, xfer_mode_str[idx]);
1851}
1852
1853static int ata_host_set_pio(struct ata_port *ap)
1854{
1855 unsigned int mask;
1856 int x, i;
1857 u8 base, xfer_mode;
1858
1859 mask = ata_get_mode_mask(ap, ATA_SHIFT_PIO);
1860 x = fgb(mask);
1861 if (x < 0) {
1862 printk(KERN_WARNING "ata%u: no PIO support\n", ap->id);
1863 return -1;
1864 }
1865
1866 base = base_from_shift(ATA_SHIFT_PIO);
1867 xfer_mode = base + x;
1868
1869 DPRINTK("base 0x%x xfer_mode 0x%x mask 0x%x x %d\n",
1870 (int)base, (int)xfer_mode, mask, x);
1871
1872 for (i = 0; i < ATA_MAX_DEVICES; i++) {
1873 struct ata_device *dev = &ap->device[i];
1874 if (ata_dev_present(dev)) {
1875 dev->pio_mode = xfer_mode;
1876 dev->xfer_mode = xfer_mode;
1877 dev->xfer_shift = ATA_SHIFT_PIO;
1878 if (ap->ops->set_piomode)
1879 ap->ops->set_piomode(ap, dev);
1880 }
1881 }
1882
1883 return 0;
1884}
1885
1886static void ata_host_set_dma(struct ata_port *ap, u8 xfer_mode,
1887 unsigned int xfer_shift)
1888{
1889 int i;
1890
1891 for (i = 0; i < ATA_MAX_DEVICES; i++) {
1892 struct ata_device *dev = &ap->device[i];
1893 if (ata_dev_present(dev)) {
1894 dev->dma_mode = xfer_mode;
1895 dev->xfer_mode = xfer_mode;
1896 dev->xfer_shift = xfer_shift;
1897 if (ap->ops->set_dmamode)
1898 ap->ops->set_dmamode(ap, dev);
1899 }
1900 }
1901}
1902
1903/**
1904 * ata_set_mode - Program timings and issue SET FEATURES - XFER
1905 * @ap: port on which timings will be programmed
1906 *
Jeff Garzik780a87f2005-05-30 15:41:05 -04001907 * Set ATA device disk transfer mode (PIO3, UDMA6, etc.).
1908 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07001909 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04001910 * PCI/etc. bus probe sem.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001911 *
1912 */
1913static void ata_set_mode(struct ata_port *ap)
1914{
Albert Lee8cbd6df2005-10-12 15:06:27 +08001915 unsigned int xfer_shift;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001916 u8 xfer_mode;
1917 int rc;
1918
1919 /* step 1: always set host PIO timings */
1920 rc = ata_host_set_pio(ap);
1921 if (rc)
1922 goto err_out;
1923
1924 /* step 2: choose the best data xfer mode */
1925 xfer_mode = xfer_shift = 0;
1926 rc = ata_choose_xfer_mode(ap, &xfer_mode, &xfer_shift);
1927 if (rc)
1928 goto err_out;
1929
1930 /* step 3: if that xfer mode isn't PIO, set host DMA timings */
1931 if (xfer_shift != ATA_SHIFT_PIO)
1932 ata_host_set_dma(ap, xfer_mode, xfer_shift);
1933
1934 /* step 4: update devices' xfer mode */
1935 ata_dev_set_mode(ap, &ap->device[0]);
1936 ata_dev_set_mode(ap, &ap->device[1]);
1937
1938 if (ap->flags & ATA_FLAG_PORT_DISABLED)
1939 return;
1940
1941 if (ap->ops->post_set_mode)
1942 ap->ops->post_set_mode(ap);
1943
Linus Torvalds1da177e2005-04-16 15:20:36 -07001944 return;
1945
1946err_out:
1947 ata_port_disable(ap);
1948}
1949
1950/**
1951 * ata_busy_sleep - sleep until BSY clears, or timeout
1952 * @ap: port containing status register to be polled
1953 * @tmout_pat: impatience timeout
1954 * @tmout: overall timeout
1955 *
Jeff Garzik780a87f2005-05-30 15:41:05 -04001956 * Sleep until ATA Status register bit BSY clears,
1957 * or a timeout occurs.
1958 *
1959 * LOCKING: None.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001960 *
1961 */
1962
1963static unsigned int ata_busy_sleep (struct ata_port *ap,
1964 unsigned long tmout_pat,
1965 unsigned long tmout)
1966{
1967 unsigned long timer_start, timeout;
1968 u8 status;
1969
1970 status = ata_busy_wait(ap, ATA_BUSY, 300);
1971 timer_start = jiffies;
1972 timeout = timer_start + tmout_pat;
1973 while ((status & ATA_BUSY) && (time_before(jiffies, timeout))) {
1974 msleep(50);
1975 status = ata_busy_wait(ap, ATA_BUSY, 3);
1976 }
1977
1978 if (status & ATA_BUSY)
1979 printk(KERN_WARNING "ata%u is slow to respond, "
1980 "please be patient\n", ap->id);
1981
1982 timeout = timer_start + tmout;
1983 while ((status & ATA_BUSY) && (time_before(jiffies, timeout))) {
1984 msleep(50);
1985 status = ata_chk_status(ap);
1986 }
1987
1988 if (status & ATA_BUSY) {
1989 printk(KERN_ERR "ata%u failed to respond (%lu secs)\n",
1990 ap->id, tmout / HZ);
1991 return 1;
1992 }
1993
1994 return 0;
1995}
1996
1997static void ata_bus_post_reset(struct ata_port *ap, unsigned int devmask)
1998{
1999 struct ata_ioports *ioaddr = &ap->ioaddr;
2000 unsigned int dev0 = devmask & (1 << 0);
2001 unsigned int dev1 = devmask & (1 << 1);
2002 unsigned long timeout;
2003
2004 /* if device 0 was found in ata_devchk, wait for its
2005 * BSY bit to clear
2006 */
2007 if (dev0)
2008 ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT);
2009
2010 /* if device 1 was found in ata_devchk, wait for
2011 * register access, then wait for BSY to clear
2012 */
2013 timeout = jiffies + ATA_TMOUT_BOOT;
2014 while (dev1) {
2015 u8 nsect, lbal;
2016
2017 ap->ops->dev_select(ap, 1);
2018 if (ap->flags & ATA_FLAG_MMIO) {
2019 nsect = readb((void __iomem *) ioaddr->nsect_addr);
2020 lbal = readb((void __iomem *) ioaddr->lbal_addr);
2021 } else {
2022 nsect = inb(ioaddr->nsect_addr);
2023 lbal = inb(ioaddr->lbal_addr);
2024 }
2025 if ((nsect == 1) && (lbal == 1))
2026 break;
2027 if (time_after(jiffies, timeout)) {
2028 dev1 = 0;
2029 break;
2030 }
2031 msleep(50); /* give drive a breather */
2032 }
2033 if (dev1)
2034 ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT);
2035
2036 /* is all this really necessary? */
2037 ap->ops->dev_select(ap, 0);
2038 if (dev1)
2039 ap->ops->dev_select(ap, 1);
2040 if (dev0)
2041 ap->ops->dev_select(ap, 0);
2042}
2043
2044/**
Jeff Garzik0cba6322005-05-30 19:49:12 -04002045 * ata_bus_edd - Issue EXECUTE DEVICE DIAGNOSTIC command.
2046 * @ap: Port to reset and probe
Linus Torvalds1da177e2005-04-16 15:20:36 -07002047 *
Jeff Garzik0cba6322005-05-30 19:49:12 -04002048 * Use the EXECUTE DEVICE DIAGNOSTIC command to reset and
2049 * probe the bus. Not often used these days.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002050 *
2051 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04002052 * PCI/etc. bus probe sem.
Jeff Garzike5338252005-10-30 21:37:17 -05002053 * Obtains host_set lock.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002054 *
2055 */
2056
2057static unsigned int ata_bus_edd(struct ata_port *ap)
2058{
2059 struct ata_taskfile tf;
Jeff Garzike5338252005-10-30 21:37:17 -05002060 unsigned long flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002061
2062 /* set up execute-device-diag (bus reset) taskfile */
2063 /* also, take interrupts to a known state (disabled) */
2064 DPRINTK("execute-device-diag\n");
2065 ata_tf_init(ap, &tf, 0);
2066 tf.ctl |= ATA_NIEN;
2067 tf.command = ATA_CMD_EDD;
2068 tf.protocol = ATA_PROT_NODATA;
2069
2070 /* do bus reset */
Jeff Garzike5338252005-10-30 21:37:17 -05002071 spin_lock_irqsave(&ap->host_set->lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002072 ata_tf_to_host(ap, &tf);
Jeff Garzike5338252005-10-30 21:37:17 -05002073 spin_unlock_irqrestore(&ap->host_set->lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002074
2075 /* spec says at least 2ms. but who knows with those
2076 * crazy ATAPI devices...
2077 */
2078 msleep(150);
2079
2080 return ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT);
2081}
2082
2083static unsigned int ata_bus_softreset(struct ata_port *ap,
2084 unsigned int devmask)
2085{
2086 struct ata_ioports *ioaddr = &ap->ioaddr;
2087
2088 DPRINTK("ata%u: bus reset via SRST\n", ap->id);
2089
2090 /* software reset. causes dev0 to be selected */
2091 if (ap->flags & ATA_FLAG_MMIO) {
2092 writeb(ap->ctl, (void __iomem *) ioaddr->ctl_addr);
2093 udelay(20); /* FIXME: flush */
2094 writeb(ap->ctl | ATA_SRST, (void __iomem *) ioaddr->ctl_addr);
2095 udelay(20); /* FIXME: flush */
2096 writeb(ap->ctl, (void __iomem *) ioaddr->ctl_addr);
2097 } else {
2098 outb(ap->ctl, ioaddr->ctl_addr);
2099 udelay(10);
2100 outb(ap->ctl | ATA_SRST, ioaddr->ctl_addr);
2101 udelay(10);
2102 outb(ap->ctl, ioaddr->ctl_addr);
2103 }
2104
2105 /* spec mandates ">= 2ms" before checking status.
2106 * We wait 150ms, because that was the magic delay used for
2107 * ATAPI devices in Hale Landis's ATADRVR, for the period of time
2108 * between when the ATA command register is written, and then
2109 * status is checked. Because waiting for "a while" before
2110 * checking status is fine, post SRST, we perform this magic
2111 * delay here as well.
2112 */
2113 msleep(150);
2114
2115 ata_bus_post_reset(ap, devmask);
2116
2117 return 0;
2118}
2119
2120/**
2121 * ata_bus_reset - reset host port and associated ATA channel
2122 * @ap: port to reset
2123 *
2124 * This is typically the first time we actually start issuing
2125 * commands to the ATA channel. We wait for BSY to clear, then
2126 * issue EXECUTE DEVICE DIAGNOSTIC command, polling for its
2127 * result. Determine what devices, if any, are on the channel
2128 * by looking at the device 0/1 error register. Look at the signature
2129 * stored in each device's taskfile registers, to determine if
2130 * the device is ATA or ATAPI.
2131 *
2132 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04002133 * PCI/etc. bus probe sem.
2134 * Obtains host_set lock.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002135 *
2136 * SIDE EFFECTS:
2137 * Sets ATA_FLAG_PORT_DISABLED if bus reset fails.
2138 */
2139
2140void ata_bus_reset(struct ata_port *ap)
2141{
2142 struct ata_ioports *ioaddr = &ap->ioaddr;
2143 unsigned int slave_possible = ap->flags & ATA_FLAG_SLAVE_POSS;
2144 u8 err;
2145 unsigned int dev0, dev1 = 0, rc = 0, devmask = 0;
2146
2147 DPRINTK("ENTER, host %u, port %u\n", ap->id, ap->port_no);
2148
2149 /* determine if device 0/1 are present */
2150 if (ap->flags & ATA_FLAG_SATA_RESET)
2151 dev0 = 1;
2152 else {
2153 dev0 = ata_devchk(ap, 0);
2154 if (slave_possible)
2155 dev1 = ata_devchk(ap, 1);
2156 }
2157
2158 if (dev0)
2159 devmask |= (1 << 0);
2160 if (dev1)
2161 devmask |= (1 << 1);
2162
2163 /* select device 0 again */
2164 ap->ops->dev_select(ap, 0);
2165
2166 /* issue bus reset */
2167 if (ap->flags & ATA_FLAG_SRST)
2168 rc = ata_bus_softreset(ap, devmask);
2169 else if ((ap->flags & ATA_FLAG_SATA_RESET) == 0) {
2170 /* set up device control */
2171 if (ap->flags & ATA_FLAG_MMIO)
2172 writeb(ap->ctl, (void __iomem *) ioaddr->ctl_addr);
2173 else
2174 outb(ap->ctl, ioaddr->ctl_addr);
2175 rc = ata_bus_edd(ap);
2176 }
2177
2178 if (rc)
2179 goto err_out;
2180
2181 /*
2182 * determine by signature whether we have ATA or ATAPI devices
2183 */
2184 err = ata_dev_try_classify(ap, 0);
2185 if ((slave_possible) && (err != 0x81))
2186 ata_dev_try_classify(ap, 1);
2187
2188 /* re-enable interrupts */
2189 if (ap->ioaddr.ctl_addr) /* FIXME: hack. create a hook instead */
2190 ata_irq_on(ap);
2191
2192 /* is double-select really necessary? */
2193 if (ap->device[1].class != ATA_DEV_NONE)
2194 ap->ops->dev_select(ap, 1);
2195 if (ap->device[0].class != ATA_DEV_NONE)
2196 ap->ops->dev_select(ap, 0);
2197
2198 /* if no devices were detected, disable this port */
2199 if ((ap->device[0].class == ATA_DEV_NONE) &&
2200 (ap->device[1].class == ATA_DEV_NONE))
2201 goto err_out;
2202
2203 if (ap->flags & (ATA_FLAG_SATA_RESET | ATA_FLAG_SRST)) {
2204 /* set up device control for ATA_FLAG_SATA_RESET */
2205 if (ap->flags & ATA_FLAG_MMIO)
2206 writeb(ap->ctl, (void __iomem *) ioaddr->ctl_addr);
2207 else
2208 outb(ap->ctl, ioaddr->ctl_addr);
2209 }
2210
2211 DPRINTK("EXIT\n");
2212 return;
2213
2214err_out:
2215 printk(KERN_ERR "ata%u: disabling port\n", ap->id);
2216 ap->ops->port_disable(ap);
2217
2218 DPRINTK("EXIT\n");
2219}
2220
Jeff Garzik057ace52005-10-22 14:27:05 -04002221static void ata_pr_blacklisted(const struct ata_port *ap,
2222 const struct ata_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002223{
2224 printk(KERN_WARNING "ata%u: dev %u is on DMA blacklist, disabling DMA\n",
2225 ap->id, dev->devno);
2226}
2227
Arjan van de Ven98ac62d2005-11-28 10:06:23 +01002228static const char * const ata_dma_blacklist [] = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002229 "WDC AC11000H",
2230 "WDC AC22100H",
2231 "WDC AC32500H",
2232 "WDC AC33100H",
2233 "WDC AC31600H",
2234 "WDC AC32100H",
2235 "WDC AC23200L",
2236 "Compaq CRD-8241B",
2237 "CRD-8400B",
2238 "CRD-8480B",
2239 "CRD-8482B",
2240 "CRD-84",
2241 "SanDisk SDP3B",
2242 "SanDisk SDP3B-64",
2243 "SANYO CD-ROM CRD",
2244 "HITACHI CDR-8",
2245 "HITACHI CDR-8335",
2246 "HITACHI CDR-8435",
2247 "Toshiba CD-ROM XM-6202B",
Jeff Garzike9222562005-06-28 00:03:37 -04002248 "TOSHIBA CD-ROM XM-1702BC",
Linus Torvalds1da177e2005-04-16 15:20:36 -07002249 "CD-532E-A",
2250 "E-IDE CD-ROM CR-840",
2251 "CD-ROM Drive/F5A",
2252 "WPI CDD-820",
2253 "SAMSUNG CD-ROM SC-148C",
2254 "SAMSUNG CD-ROM SC",
2255 "SanDisk SDP3B-64",
Linus Torvalds1da177e2005-04-16 15:20:36 -07002256 "ATAPI CD-ROM DRIVE 40X MAXIMUM",
2257 "_NEC DV5800A",
2258};
2259
Jeff Garzik057ace52005-10-22 14:27:05 -04002260static int ata_dma_blacklisted(const struct ata_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002261{
2262 unsigned char model_num[40];
2263 char *s;
2264 unsigned int len;
2265 int i;
2266
2267 ata_dev_id_string(dev->id, model_num, ATA_ID_PROD_OFS,
2268 sizeof(model_num));
2269 s = &model_num[0];
2270 len = strnlen(s, sizeof(model_num));
2271
2272 /* ATAPI specifies that empty space is blank-filled; remove blanks */
2273 while ((len > 0) && (s[len - 1] == ' ')) {
2274 len--;
2275 s[len] = 0;
2276 }
2277
2278 for (i = 0; i < ARRAY_SIZE(ata_dma_blacklist); i++)
2279 if (!strncmp(ata_dma_blacklist[i], s, len))
2280 return 1;
2281
2282 return 0;
2283}
2284
Jeff Garzik057ace52005-10-22 14:27:05 -04002285static unsigned int ata_get_mode_mask(const struct ata_port *ap, int shift)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002286{
Jeff Garzik057ace52005-10-22 14:27:05 -04002287 const struct ata_device *master, *slave;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002288 unsigned int mask;
2289
2290 master = &ap->device[0];
2291 slave = &ap->device[1];
2292
2293 assert (ata_dev_present(master) || ata_dev_present(slave));
2294
2295 if (shift == ATA_SHIFT_UDMA) {
2296 mask = ap->udma_mask;
2297 if (ata_dev_present(master)) {
2298 mask &= (master->id[ATA_ID_UDMA_MODES] & 0xff);
Jeff Garzik057ace52005-10-22 14:27:05 -04002299 if (ata_dma_blacklisted(master)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002300 mask = 0;
2301 ata_pr_blacklisted(ap, master);
2302 }
2303 }
2304 if (ata_dev_present(slave)) {
2305 mask &= (slave->id[ATA_ID_UDMA_MODES] & 0xff);
Jeff Garzik057ace52005-10-22 14:27:05 -04002306 if (ata_dma_blacklisted(slave)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002307 mask = 0;
2308 ata_pr_blacklisted(ap, slave);
2309 }
2310 }
2311 }
2312 else if (shift == ATA_SHIFT_MWDMA) {
2313 mask = ap->mwdma_mask;
2314 if (ata_dev_present(master)) {
2315 mask &= (master->id[ATA_ID_MWDMA_MODES] & 0x07);
Jeff Garzik057ace52005-10-22 14:27:05 -04002316 if (ata_dma_blacklisted(master)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002317 mask = 0;
2318 ata_pr_blacklisted(ap, master);
2319 }
2320 }
2321 if (ata_dev_present(slave)) {
2322 mask &= (slave->id[ATA_ID_MWDMA_MODES] & 0x07);
Jeff Garzik057ace52005-10-22 14:27:05 -04002323 if (ata_dma_blacklisted(slave)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002324 mask = 0;
2325 ata_pr_blacklisted(ap, slave);
2326 }
2327 }
2328 }
2329 else if (shift == ATA_SHIFT_PIO) {
2330 mask = ap->pio_mask;
2331 if (ata_dev_present(master)) {
2332 /* spec doesn't return explicit support for
2333 * PIO0-2, so we fake it
2334 */
2335 u16 tmp_mode = master->id[ATA_ID_PIO_MODES] & 0x03;
2336 tmp_mode <<= 3;
2337 tmp_mode |= 0x7;
2338 mask &= tmp_mode;
2339 }
2340 if (ata_dev_present(slave)) {
2341 /* spec doesn't return explicit support for
2342 * PIO0-2, so we fake it
2343 */
2344 u16 tmp_mode = slave->id[ATA_ID_PIO_MODES] & 0x03;
2345 tmp_mode <<= 3;
2346 tmp_mode |= 0x7;
2347 mask &= tmp_mode;
2348 }
2349 }
2350 else {
2351 mask = 0xffffffff; /* shut up compiler warning */
2352 BUG();
2353 }
2354
2355 return mask;
2356}
2357
2358/* find greatest bit */
2359static int fgb(u32 bitmap)
2360{
2361 unsigned int i;
2362 int x = -1;
2363
2364 for (i = 0; i < 32; i++)
2365 if (bitmap & (1 << i))
2366 x = i;
2367
2368 return x;
2369}
2370
2371/**
2372 * ata_choose_xfer_mode - attempt to find best transfer mode
2373 * @ap: Port for which an xfer mode will be selected
2374 * @xfer_mode_out: (output) SET FEATURES - XFER MODE code
2375 * @xfer_shift_out: (output) bit shift that selects this mode
2376 *
Jeff Garzik0cba6322005-05-30 19:49:12 -04002377 * Based on host and device capabilities, determine the
2378 * maximum transfer mode that is amenable to all.
2379 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07002380 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04002381 * PCI/etc. bus probe sem.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002382 *
2383 * RETURNS:
2384 * Zero on success, negative on error.
2385 */
2386
Jeff Garzik057ace52005-10-22 14:27:05 -04002387static int ata_choose_xfer_mode(const struct ata_port *ap,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002388 u8 *xfer_mode_out,
2389 unsigned int *xfer_shift_out)
2390{
2391 unsigned int mask, shift;
2392 int x, i;
2393
2394 for (i = 0; i < ARRAY_SIZE(xfer_mode_classes); i++) {
2395 shift = xfer_mode_classes[i].shift;
2396 mask = ata_get_mode_mask(ap, shift);
2397
2398 x = fgb(mask);
2399 if (x >= 0) {
2400 *xfer_mode_out = xfer_mode_classes[i].base + x;
2401 *xfer_shift_out = shift;
2402 return 0;
2403 }
2404 }
2405
2406 return -1;
2407}
2408
2409/**
2410 * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command
2411 * @ap: Port associated with device @dev
2412 * @dev: Device to which command will be sent
2413 *
Jeff Garzik780a87f2005-05-30 15:41:05 -04002414 * Issue SET FEATURES - XFER MODE command to device @dev
2415 * on port @ap.
2416 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07002417 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04002418 * PCI/etc. bus probe sem.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002419 */
2420
2421static void ata_dev_set_xfermode(struct ata_port *ap, struct ata_device *dev)
2422{
Tejun Heoa0123702005-12-13 14:49:31 +09002423 struct ata_taskfile tf;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002424
2425 /* set up set-features taskfile */
2426 DPRINTK("set features - xfer mode\n");
2427
Tejun Heoa0123702005-12-13 14:49:31 +09002428 ata_tf_init(ap, &tf, dev->devno);
2429 tf.command = ATA_CMD_SET_FEATURES;
2430 tf.feature = SETFEATURES_XFER;
2431 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2432 tf.protocol = ATA_PROT_NODATA;
2433 tf.nsect = dev->xfer_mode;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002434
Tejun Heoa0123702005-12-13 14:49:31 +09002435 if (ata_exec_internal(ap, dev, &tf, DMA_NONE, NULL, 0)) {
2436 printk(KERN_ERR "ata%u: failed to set xfermode, disabled\n",
2437 ap->id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002438 ata_port_disable(ap);
Tejun Heoa0123702005-12-13 14:49:31 +09002439 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002440
2441 DPRINTK("EXIT\n");
2442}
2443
2444/**
Albert Lee59a10b12005-10-12 15:09:42 +08002445 * ata_dev_reread_id - Reread the device identify device info
2446 * @ap: port where the device is
2447 * @dev: device to reread the identify device info
2448 *
2449 * LOCKING:
2450 */
2451
2452static void ata_dev_reread_id(struct ata_port *ap, struct ata_device *dev)
2453{
Tejun Heoa0123702005-12-13 14:49:31 +09002454 struct ata_taskfile tf;
Albert Lee59a10b12005-10-12 15:09:42 +08002455
Tejun Heoa0123702005-12-13 14:49:31 +09002456 ata_tf_init(ap, &tf, dev->devno);
Albert Lee59a10b12005-10-12 15:09:42 +08002457
2458 if (dev->class == ATA_DEV_ATA) {
Tejun Heoa0123702005-12-13 14:49:31 +09002459 tf.command = ATA_CMD_ID_ATA;
Albert Lee59a10b12005-10-12 15:09:42 +08002460 DPRINTK("do ATA identify\n");
2461 } else {
Tejun Heoa0123702005-12-13 14:49:31 +09002462 tf.command = ATA_CMD_ID_ATAPI;
Albert Lee59a10b12005-10-12 15:09:42 +08002463 DPRINTK("do ATAPI identify\n");
2464 }
2465
Tejun Heoa0123702005-12-13 14:49:31 +09002466 tf.flags |= ATA_TFLAG_DEVICE;
2467 tf.protocol = ATA_PROT_PIO;
Albert Lee59a10b12005-10-12 15:09:42 +08002468
Tejun Heoa0123702005-12-13 14:49:31 +09002469 if (ata_exec_internal(ap, dev, &tf, DMA_FROM_DEVICE,
2470 dev->id, sizeof(dev->id)))
Albert Lee59a10b12005-10-12 15:09:42 +08002471 goto err_out;
2472
Albert Lee59a10b12005-10-12 15:09:42 +08002473 swap_buf_le16(dev->id, ATA_ID_WORDS);
2474
2475 ata_dump_id(dev);
2476
2477 DPRINTK("EXIT\n");
2478
2479 return;
2480err_out:
Tejun Heoa0123702005-12-13 14:49:31 +09002481 printk(KERN_ERR "ata%u: failed to reread ID, disabled\n", ap->id);
Albert Lee59a10b12005-10-12 15:09:42 +08002482 ata_port_disable(ap);
2483}
2484
2485/**
Albert Lee8bf62ece2005-05-12 15:29:42 -04002486 * ata_dev_init_params - Issue INIT DEV PARAMS command
2487 * @ap: Port associated with device @dev
2488 * @dev: Device to which command will be sent
2489 *
2490 * LOCKING:
2491 */
2492
2493static void ata_dev_init_params(struct ata_port *ap, struct ata_device *dev)
2494{
Tejun Heoa0123702005-12-13 14:49:31 +09002495 struct ata_taskfile tf;
Albert Lee8bf62ece2005-05-12 15:29:42 -04002496 u16 sectors = dev->id[6];
2497 u16 heads = dev->id[3];
2498
2499 /* Number of sectors per track 1-255. Number of heads 1-16 */
2500 if (sectors < 1 || sectors > 255 || heads < 1 || heads > 16)
2501 return;
2502
2503 /* set up init dev params taskfile */
2504 DPRINTK("init dev params \n");
2505
Tejun Heoa0123702005-12-13 14:49:31 +09002506 ata_tf_init(ap, &tf, dev->devno);
2507 tf.command = ATA_CMD_INIT_DEV_PARAMS;
2508 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2509 tf.protocol = ATA_PROT_NODATA;
2510 tf.nsect = sectors;
2511 tf.device |= (heads - 1) & 0x0f; /* max head = num. of heads - 1 */
Albert Lee8bf62ece2005-05-12 15:29:42 -04002512
Tejun Heoa0123702005-12-13 14:49:31 +09002513 if (ata_exec_internal(ap, dev, &tf, DMA_NONE, NULL, 0)) {
2514 printk(KERN_ERR "ata%u: failed to init parameters, disabled\n",
2515 ap->id);
Albert Lee8bf62ece2005-05-12 15:29:42 -04002516 ata_port_disable(ap);
Tejun Heoa0123702005-12-13 14:49:31 +09002517 }
Albert Lee8bf62ece2005-05-12 15:29:42 -04002518
2519 DPRINTK("EXIT\n");
2520}
2521
2522/**
Jeff Garzik0cba6322005-05-30 19:49:12 -04002523 * ata_sg_clean - Unmap DMA memory associated with command
2524 * @qc: Command containing DMA memory to be released
2525 *
2526 * Unmap all mapped DMA memory associated with this command.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002527 *
2528 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04002529 * spin_lock_irqsave(host_set lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002530 */
2531
2532static void ata_sg_clean(struct ata_queued_cmd *qc)
2533{
2534 struct ata_port *ap = qc->ap;
Jeff Garzikcedc9a42005-10-05 07:13:30 -04002535 struct scatterlist *sg = qc->__sg;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002536 int dir = qc->dma_dir;
Jeff Garzikcedc9a42005-10-05 07:13:30 -04002537 void *pad_buf = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002538
2539 assert(qc->flags & ATA_QCFLAG_DMAMAP);
2540 assert(sg != NULL);
2541
2542 if (qc->flags & ATA_QCFLAG_SINGLE)
2543 assert(qc->n_elem == 1);
2544
Jeff Garzik2c13b7c2005-11-14 14:14:16 -05002545 VPRINTK("unmapping %u sg elements\n", qc->n_elem);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002546
Jeff Garzikcedc9a42005-10-05 07:13:30 -04002547 /* if we padded the buffer out to 32-bit bound, and data
2548 * xfer direction is from-device, we must copy from the
2549 * pad buffer back into the supplied buffer
2550 */
2551 if (qc->pad_len && !(qc->tf.flags & ATA_TFLAG_WRITE))
2552 pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ);
2553
2554 if (qc->flags & ATA_QCFLAG_SG) {
Jeff Garzike1410f22005-11-14 14:06:26 -05002555 if (qc->n_elem)
2556 dma_unmap_sg(ap->host_set->dev, sg, qc->n_elem, dir);
Jeff Garzikcedc9a42005-10-05 07:13:30 -04002557 /* restore last sg */
2558 sg[qc->orig_n_elem - 1].length += qc->pad_len;
2559 if (pad_buf) {
2560 struct scatterlist *psg = &qc->pad_sgent;
2561 void *addr = kmap_atomic(psg->page, KM_IRQ0);
2562 memcpy(addr + psg->offset, pad_buf, qc->pad_len);
Mark Lorddfa15982005-12-12 23:19:28 -05002563 kunmap_atomic(addr, KM_IRQ0);
Jeff Garzikcedc9a42005-10-05 07:13:30 -04002564 }
2565 } else {
Jeff Garzike1410f22005-11-14 14:06:26 -05002566 if (sg_dma_len(&sg[0]) > 0)
2567 dma_unmap_single(ap->host_set->dev,
2568 sg_dma_address(&sg[0]), sg_dma_len(&sg[0]),
2569 dir);
Jeff Garzikcedc9a42005-10-05 07:13:30 -04002570 /* restore sg */
2571 sg->length += qc->pad_len;
2572 if (pad_buf)
2573 memcpy(qc->buf_virt + sg->length - qc->pad_len,
2574 pad_buf, qc->pad_len);
2575 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002576
2577 qc->flags &= ~ATA_QCFLAG_DMAMAP;
Jeff Garzikcedc9a42005-10-05 07:13:30 -04002578 qc->__sg = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002579}
2580
2581/**
2582 * ata_fill_sg - Fill PCI IDE PRD table
2583 * @qc: Metadata associated with taskfile to be transferred
2584 *
Jeff Garzik780a87f2005-05-30 15:41:05 -04002585 * Fill PCI IDE PRD (scatter-gather) table with segments
2586 * associated with the current disk command.
2587 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07002588 * LOCKING:
Jeff Garzik780a87f2005-05-30 15:41:05 -04002589 * spin_lock_irqsave(host_set lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002590 *
2591 */
2592static void ata_fill_sg(struct ata_queued_cmd *qc)
2593{
Linus Torvalds1da177e2005-04-16 15:20:36 -07002594 struct ata_port *ap = qc->ap;
Jeff Garzikcedc9a42005-10-05 07:13:30 -04002595 struct scatterlist *sg;
2596 unsigned int idx;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002597
Jeff Garzikcedc9a42005-10-05 07:13:30 -04002598 assert(qc->__sg != NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002599 assert(qc->n_elem > 0);
2600
2601 idx = 0;
Jeff Garzikcedc9a42005-10-05 07:13:30 -04002602 ata_for_each_sg(sg, qc) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002603 u32 addr, offset;
2604 u32 sg_len, len;
2605
2606 /* determine if physical DMA addr spans 64K boundary.
2607 * Note h/w doesn't support 64-bit, so we unconditionally
2608 * truncate dma_addr_t to u32.
2609 */
2610 addr = (u32) sg_dma_address(sg);
2611 sg_len = sg_dma_len(sg);
2612
2613 while (sg_len) {
2614 offset = addr & 0xffff;
2615 len = sg_len;
2616 if ((offset + sg_len) > 0x10000)
2617 len = 0x10000 - offset;
2618
2619 ap->prd[idx].addr = cpu_to_le32(addr);
2620 ap->prd[idx].flags_len = cpu_to_le32(len & 0xffff);
2621 VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", idx, addr, len);
2622
2623 idx++;
2624 sg_len -= len;
2625 addr += len;
2626 }
2627 }
2628
2629 if (idx)
2630 ap->prd[idx - 1].flags_len |= cpu_to_le32(ATA_PRD_EOT);
2631}
2632/**
2633 * ata_check_atapi_dma - Check whether ATAPI DMA can be supported
2634 * @qc: Metadata associated with taskfile to check
2635 *
Jeff Garzik780a87f2005-05-30 15:41:05 -04002636 * Allow low-level driver to filter ATA PACKET commands, returning
2637 * a status indicating whether or not it is OK to use DMA for the
2638 * supplied PACKET command.
2639 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07002640 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04002641 * spin_lock_irqsave(host_set lock)
2642 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07002643 * RETURNS: 0 when ATAPI DMA can be used
2644 * nonzero otherwise
2645 */
2646int ata_check_atapi_dma(struct ata_queued_cmd *qc)
2647{
2648 struct ata_port *ap = qc->ap;
2649 int rc = 0; /* Assume ATAPI DMA is OK by default */
2650
2651 if (ap->ops->check_atapi_dma)
2652 rc = ap->ops->check_atapi_dma(qc);
2653
2654 return rc;
2655}
2656/**
2657 * ata_qc_prep - Prepare taskfile for submission
2658 * @qc: Metadata associated with taskfile to be prepared
2659 *
Jeff Garzik780a87f2005-05-30 15:41:05 -04002660 * Prepare ATA taskfile for submission.
2661 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07002662 * LOCKING:
2663 * spin_lock_irqsave(host_set lock)
2664 */
2665void ata_qc_prep(struct ata_queued_cmd *qc)
2666{
2667 if (!(qc->flags & ATA_QCFLAG_DMAMAP))
2668 return;
2669
2670 ata_fill_sg(qc);
2671}
2672
Jeff Garzik0cba6322005-05-30 19:49:12 -04002673/**
2674 * ata_sg_init_one - Associate command with memory buffer
2675 * @qc: Command to be associated
2676 * @buf: Memory buffer
2677 * @buflen: Length of memory buffer, in bytes.
2678 *
2679 * Initialize the data-related elements of queued_cmd @qc
2680 * to point to a single memory buffer, @buf of byte length @buflen.
2681 *
2682 * LOCKING:
2683 * spin_lock_irqsave(host_set lock)
2684 */
2685
Linus Torvalds1da177e2005-04-16 15:20:36 -07002686void ata_sg_init_one(struct ata_queued_cmd *qc, void *buf, unsigned int buflen)
2687{
2688 struct scatterlist *sg;
2689
2690 qc->flags |= ATA_QCFLAG_SINGLE;
2691
2692 memset(&qc->sgent, 0, sizeof(qc->sgent));
Jeff Garzikcedc9a42005-10-05 07:13:30 -04002693 qc->__sg = &qc->sgent;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002694 qc->n_elem = 1;
Jeff Garzikcedc9a42005-10-05 07:13:30 -04002695 qc->orig_n_elem = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002696 qc->buf_virt = buf;
2697
Jeff Garzikcedc9a42005-10-05 07:13:30 -04002698 sg = qc->__sg;
Jeff Garzikf0612bb2005-10-30 01:58:18 -05002699 sg_init_one(sg, buf, buflen);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002700}
2701
Jeff Garzik0cba6322005-05-30 19:49:12 -04002702/**
2703 * ata_sg_init - Associate command with scatter-gather table.
2704 * @qc: Command to be associated
2705 * @sg: Scatter-gather table.
2706 * @n_elem: Number of elements in s/g table.
2707 *
2708 * Initialize the data-related elements of queued_cmd @qc
2709 * to point to a scatter-gather table @sg, containing @n_elem
2710 * elements.
2711 *
2712 * LOCKING:
2713 * spin_lock_irqsave(host_set lock)
2714 */
2715
Linus Torvalds1da177e2005-04-16 15:20:36 -07002716void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
2717 unsigned int n_elem)
2718{
2719 qc->flags |= ATA_QCFLAG_SG;
Jeff Garzikcedc9a42005-10-05 07:13:30 -04002720 qc->__sg = sg;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002721 qc->n_elem = n_elem;
Jeff Garzikcedc9a42005-10-05 07:13:30 -04002722 qc->orig_n_elem = n_elem;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002723}
2724
2725/**
Jeff Garzik0cba6322005-05-30 19:49:12 -04002726 * ata_sg_setup_one - DMA-map the memory buffer associated with a command.
2727 * @qc: Command with memory buffer to be mapped.
2728 *
2729 * DMA-map the memory buffer associated with queued_cmd @qc.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002730 *
2731 * LOCKING:
2732 * spin_lock_irqsave(host_set lock)
2733 *
2734 * RETURNS:
Jeff Garzik0cba6322005-05-30 19:49:12 -04002735 * Zero on success, negative on error.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002736 */
2737
2738static int ata_sg_setup_one(struct ata_queued_cmd *qc)
2739{
2740 struct ata_port *ap = qc->ap;
2741 int dir = qc->dma_dir;
Jeff Garzikcedc9a42005-10-05 07:13:30 -04002742 struct scatterlist *sg = qc->__sg;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002743 dma_addr_t dma_address;
2744
Jeff Garzikcedc9a42005-10-05 07:13:30 -04002745 /* we must lengthen transfers to end on a 32-bit boundary */
2746 qc->pad_len = sg->length & 3;
2747 if (qc->pad_len) {
2748 void *pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ);
2749 struct scatterlist *psg = &qc->pad_sgent;
2750
2751 assert(qc->dev->class == ATA_DEV_ATAPI);
2752
2753 memset(pad_buf, 0, ATA_DMA_PAD_SZ);
2754
2755 if (qc->tf.flags & ATA_TFLAG_WRITE)
2756 memcpy(pad_buf, qc->buf_virt + sg->length - qc->pad_len,
2757 qc->pad_len);
2758
2759 sg_dma_address(psg) = ap->pad_dma + (qc->tag * ATA_DMA_PAD_SZ);
2760 sg_dma_len(psg) = ATA_DMA_PAD_SZ;
2761 /* trim sg */
2762 sg->length -= qc->pad_len;
2763
2764 DPRINTK("padding done, sg->length=%u pad_len=%u\n",
2765 sg->length, qc->pad_len);
2766 }
2767
Jeff Garzike1410f22005-11-14 14:06:26 -05002768 if (!sg->length) {
2769 sg_dma_address(sg) = 0;
2770 goto skip_map;
2771 }
2772
Linus Torvalds1da177e2005-04-16 15:20:36 -07002773 dma_address = dma_map_single(ap->host_set->dev, qc->buf_virt,
Albert Lee32529e02005-05-26 03:49:42 -04002774 sg->length, dir);
Tejun Heo537a95d2005-11-05 14:29:01 -05002775 if (dma_mapping_error(dma_address)) {
2776 /* restore sg */
2777 sg->length += qc->pad_len;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002778 return -1;
Tejun Heo537a95d2005-11-05 14:29:01 -05002779 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002780
2781 sg_dma_address(sg) = dma_address;
Jeff Garzike1410f22005-11-14 14:06:26 -05002782skip_map:
Albert Lee32529e02005-05-26 03:49:42 -04002783 sg_dma_len(sg) = sg->length;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002784
2785 DPRINTK("mapped buffer of %d bytes for %s\n", sg_dma_len(sg),
2786 qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read");
2787
2788 return 0;
2789}
2790
2791/**
Jeff Garzik0cba6322005-05-30 19:49:12 -04002792 * ata_sg_setup - DMA-map the scatter-gather table associated with a command.
2793 * @qc: Command with scatter-gather table to be mapped.
2794 *
2795 * DMA-map the scatter-gather table associated with queued_cmd @qc.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002796 *
2797 * LOCKING:
2798 * spin_lock_irqsave(host_set lock)
2799 *
2800 * RETURNS:
Jeff Garzik0cba6322005-05-30 19:49:12 -04002801 * Zero on success, negative on error.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002802 *
2803 */
2804
2805static int ata_sg_setup(struct ata_queued_cmd *qc)
2806{
2807 struct ata_port *ap = qc->ap;
Jeff Garzikcedc9a42005-10-05 07:13:30 -04002808 struct scatterlist *sg = qc->__sg;
2809 struct scatterlist *lsg = &sg[qc->n_elem - 1];
Jeff Garzike1410f22005-11-14 14:06:26 -05002810 int n_elem, pre_n_elem, dir, trim_sg = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002811
2812 VPRINTK("ENTER, ata%u\n", ap->id);
2813 assert(qc->flags & ATA_QCFLAG_SG);
2814
Jeff Garzikcedc9a42005-10-05 07:13:30 -04002815 /* we must lengthen transfers to end on a 32-bit boundary */
2816 qc->pad_len = lsg->length & 3;
2817 if (qc->pad_len) {
2818 void *pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ);
2819 struct scatterlist *psg = &qc->pad_sgent;
2820 unsigned int offset;
2821
2822 assert(qc->dev->class == ATA_DEV_ATAPI);
2823
2824 memset(pad_buf, 0, ATA_DMA_PAD_SZ);
2825
2826 /*
2827 * psg->page/offset are used to copy to-be-written
2828 * data in this function or read data in ata_sg_clean.
2829 */
2830 offset = lsg->offset + lsg->length - qc->pad_len;
2831 psg->page = nth_page(lsg->page, offset >> PAGE_SHIFT);
2832 psg->offset = offset_in_page(offset);
2833
2834 if (qc->tf.flags & ATA_TFLAG_WRITE) {
2835 void *addr = kmap_atomic(psg->page, KM_IRQ0);
2836 memcpy(pad_buf, addr + psg->offset, qc->pad_len);
Mark Lorddfa15982005-12-12 23:19:28 -05002837 kunmap_atomic(addr, KM_IRQ0);
Jeff Garzikcedc9a42005-10-05 07:13:30 -04002838 }
2839
2840 sg_dma_address(psg) = ap->pad_dma + (qc->tag * ATA_DMA_PAD_SZ);
2841 sg_dma_len(psg) = ATA_DMA_PAD_SZ;
2842 /* trim last sg */
2843 lsg->length -= qc->pad_len;
Jeff Garzike1410f22005-11-14 14:06:26 -05002844 if (lsg->length == 0)
2845 trim_sg = 1;
Jeff Garzikcedc9a42005-10-05 07:13:30 -04002846
2847 DPRINTK("padding done, sg[%d].length=%u pad_len=%u\n",
2848 qc->n_elem - 1, lsg->length, qc->pad_len);
2849 }
2850
Jeff Garzike1410f22005-11-14 14:06:26 -05002851 pre_n_elem = qc->n_elem;
2852 if (trim_sg && pre_n_elem)
2853 pre_n_elem--;
2854
2855 if (!pre_n_elem) {
2856 n_elem = 0;
2857 goto skip_map;
2858 }
2859
Linus Torvalds1da177e2005-04-16 15:20:36 -07002860 dir = qc->dma_dir;
Jeff Garzike1410f22005-11-14 14:06:26 -05002861 n_elem = dma_map_sg(ap->host_set->dev, sg, pre_n_elem, dir);
Tejun Heo537a95d2005-11-05 14:29:01 -05002862 if (n_elem < 1) {
2863 /* restore last sg */
2864 lsg->length += qc->pad_len;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002865 return -1;
Tejun Heo537a95d2005-11-05 14:29:01 -05002866 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002867
2868 DPRINTK("%d sg elements mapped\n", n_elem);
2869
Jeff Garzike1410f22005-11-14 14:06:26 -05002870skip_map:
Linus Torvalds1da177e2005-04-16 15:20:36 -07002871 qc->n_elem = n_elem;
2872
2873 return 0;
2874}
2875
2876/**
Tejun Heo40e8c822005-08-22 17:12:45 +09002877 * ata_poll_qc_complete - turn irq back on and finish qc
2878 * @qc: Command to complete
Randy Dunlap8e8b77d2005-11-01 21:29:27 -08002879 * @err_mask: ATA status register content
Tejun Heo40e8c822005-08-22 17:12:45 +09002880 *
2881 * LOCKING:
2882 * None. (grabs host lock)
2883 */
2884
Albert Leea22e2eb2005-12-05 15:38:02 +08002885void ata_poll_qc_complete(struct ata_queued_cmd *qc)
Tejun Heo40e8c822005-08-22 17:12:45 +09002886{
2887 struct ata_port *ap = qc->ap;
Jeff Garzikb8f61532005-08-25 22:01:20 -04002888 unsigned long flags;
Tejun Heo40e8c822005-08-22 17:12:45 +09002889
Jeff Garzikb8f61532005-08-25 22:01:20 -04002890 spin_lock_irqsave(&ap->host_set->lock, flags);
Tejun Heo40e8c822005-08-22 17:12:45 +09002891 ap->flags &= ~ATA_FLAG_NOINTR;
2892 ata_irq_on(ap);
Albert Leea22e2eb2005-12-05 15:38:02 +08002893 ata_qc_complete(qc);
Jeff Garzikb8f61532005-08-25 22:01:20 -04002894 spin_unlock_irqrestore(&ap->host_set->lock, flags);
Tejun Heo40e8c822005-08-22 17:12:45 +09002895}
2896
2897/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07002898 * ata_pio_poll -
Randy Dunlap6f0ef4f2005-10-25 01:44:30 -04002899 * @ap: the target ata_port
Linus Torvalds1da177e2005-04-16 15:20:36 -07002900 *
2901 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04002902 * None. (executing in kernel thread context)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002903 *
2904 * RETURNS:
Randy Dunlap6f0ef4f2005-10-25 01:44:30 -04002905 * timeout value to use
Linus Torvalds1da177e2005-04-16 15:20:36 -07002906 */
2907
2908static unsigned long ata_pio_poll(struct ata_port *ap)
2909{
Albert Leec14b8332005-12-05 15:36:08 +08002910 struct ata_queued_cmd *qc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002911 u8 status;
Albert Lee14be71f2005-09-27 17:36:35 +08002912 unsigned int poll_state = HSM_ST_UNKNOWN;
2913 unsigned int reg_state = HSM_ST_UNKNOWN;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002914
Albert Leec14b8332005-12-05 15:36:08 +08002915 qc = ata_qc_from_tag(ap, ap->active_tag);
2916 assert(qc != NULL);
2917
Albert Lee14be71f2005-09-27 17:36:35 +08002918 switch (ap->hsm_task_state) {
2919 case HSM_ST:
2920 case HSM_ST_POLL:
2921 poll_state = HSM_ST_POLL;
2922 reg_state = HSM_ST;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002923 break;
Albert Lee14be71f2005-09-27 17:36:35 +08002924 case HSM_ST_LAST:
2925 case HSM_ST_LAST_POLL:
2926 poll_state = HSM_ST_LAST_POLL;
2927 reg_state = HSM_ST_LAST;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002928 break;
2929 default:
2930 BUG();
2931 break;
2932 }
2933
2934 status = ata_chk_status(ap);
2935 if (status & ATA_BUSY) {
2936 if (time_after(jiffies, ap->pio_task_timeout)) {
Tejun Heo11a56d22006-01-23 13:09:36 +09002937 qc->err_mask |= AC_ERR_TIMEOUT;
Albert Lee7c398332005-11-09 13:03:30 +08002938 ap->hsm_task_state = HSM_ST_TMOUT;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002939 return 0;
2940 }
Albert Lee14be71f2005-09-27 17:36:35 +08002941 ap->hsm_task_state = poll_state;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002942 return ATA_SHORT_PAUSE;
2943 }
2944
Albert Lee14be71f2005-09-27 17:36:35 +08002945 ap->hsm_task_state = reg_state;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002946 return 0;
2947}
2948
2949/**
Randy Dunlap6f0ef4f2005-10-25 01:44:30 -04002950 * ata_pio_complete - check if drive is busy or idle
2951 * @ap: the target ata_port
Linus Torvalds1da177e2005-04-16 15:20:36 -07002952 *
2953 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04002954 * None. (executing in kernel thread context)
Jeff Garzik7fb6ec22005-09-16 06:01:48 -04002955 *
2956 * RETURNS:
2957 * Non-zero if qc completed, zero otherwise.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002958 */
2959
Jeff Garzik7fb6ec22005-09-16 06:01:48 -04002960static int ata_pio_complete (struct ata_port *ap)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002961{
2962 struct ata_queued_cmd *qc;
2963 u8 drv_stat;
2964
2965 /*
Alan Cox31433ea2005-08-26 15:56:47 +01002966 * This is purely heuristic. This is a fast path. Sometimes when
2967 * we enter, BSY will be cleared in a chk-status or two. If not,
2968 * the drive is probably seeking or something. Snooze for a couple
2969 * msecs, then chk-status again. If still busy, fall back to
Albert Lee14be71f2005-09-27 17:36:35 +08002970 * HSM_ST_POLL state.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002971 */
Albert Leefe79e682005-12-06 11:34:59 +08002972 drv_stat = ata_busy_wait(ap, ATA_BUSY, 10);
2973 if (drv_stat & ATA_BUSY) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002974 msleep(2);
Albert Leefe79e682005-12-06 11:34:59 +08002975 drv_stat = ata_busy_wait(ap, ATA_BUSY, 10);
2976 if (drv_stat & ATA_BUSY) {
Albert Lee14be71f2005-09-27 17:36:35 +08002977 ap->hsm_task_state = HSM_ST_LAST_POLL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002978 ap->pio_task_timeout = jiffies + ATA_TMOUT_PIO;
Jeff Garzik7fb6ec22005-09-16 06:01:48 -04002979 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002980 }
2981 }
2982
Albert Leec14b8332005-12-05 15:36:08 +08002983 qc = ata_qc_from_tag(ap, ap->active_tag);
2984 assert(qc != NULL);
2985
Linus Torvalds1da177e2005-04-16 15:20:36 -07002986 drv_stat = ata_wait_idle(ap);
2987 if (!ata_ok(drv_stat)) {
Albert Lee1c848982005-12-05 15:40:15 +08002988 qc->err_mask |= __ac_err_mask(drv_stat);
Albert Lee14be71f2005-09-27 17:36:35 +08002989 ap->hsm_task_state = HSM_ST_ERR;
Jeff Garzik7fb6ec22005-09-16 06:01:48 -04002990 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002991 }
2992
Albert Lee14be71f2005-09-27 17:36:35 +08002993 ap->hsm_task_state = HSM_ST_IDLE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002994
Albert Leea22e2eb2005-12-05 15:38:02 +08002995 assert(qc->err_mask == 0);
2996 ata_poll_qc_complete(qc);
Jeff Garzik7fb6ec22005-09-16 06:01:48 -04002997
2998 /* another command may start at this point */
2999
3000 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003001}
3002
Edward Falk0baab862005-06-02 18:17:13 -04003003
3004/**
Randy Dunlap6f0ef4f2005-10-25 01:44:30 -04003005 * swap_buf_le16 - swap halves of 16-words in place
Edward Falk0baab862005-06-02 18:17:13 -04003006 * @buf: Buffer to swap
3007 * @buf_words: Number of 16-bit words in buffer.
3008 *
3009 * Swap halves of 16-bit words if needed to convert from
3010 * little-endian byte order to native cpu byte order, or
3011 * vice-versa.
3012 *
3013 * LOCKING:
Randy Dunlap6f0ef4f2005-10-25 01:44:30 -04003014 * Inherited from caller.
Edward Falk0baab862005-06-02 18:17:13 -04003015 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003016void swap_buf_le16(u16 *buf, unsigned int buf_words)
3017{
3018#ifdef __BIG_ENDIAN
3019 unsigned int i;
3020
3021 for (i = 0; i < buf_words; i++)
3022 buf[i] = le16_to_cpu(buf[i]);
3023#endif /* __BIG_ENDIAN */
3024}
3025
Albert Lee6ae4cfb2005-08-12 14:15:34 +08003026/**
3027 * ata_mmio_data_xfer - Transfer data by MMIO
3028 * @ap: port to read/write
3029 * @buf: data buffer
3030 * @buflen: buffer length
Jeff Garzik344baba2005-09-07 01:15:17 -04003031 * @write_data: read/write
Albert Lee6ae4cfb2005-08-12 14:15:34 +08003032 *
3033 * Transfer data from/to the device data register by MMIO.
3034 *
3035 * LOCKING:
3036 * Inherited from caller.
Albert Lee6ae4cfb2005-08-12 14:15:34 +08003037 */
3038
Linus Torvalds1da177e2005-04-16 15:20:36 -07003039static void ata_mmio_data_xfer(struct ata_port *ap, unsigned char *buf,
3040 unsigned int buflen, int write_data)
3041{
3042 unsigned int i;
3043 unsigned int words = buflen >> 1;
3044 u16 *buf16 = (u16 *) buf;
3045 void __iomem *mmio = (void __iomem *)ap->ioaddr.data_addr;
3046
Albert Lee6ae4cfb2005-08-12 14:15:34 +08003047 /* Transfer multiple of 2 bytes */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003048 if (write_data) {
3049 for (i = 0; i < words; i++)
3050 writew(le16_to_cpu(buf16[i]), mmio);
3051 } else {
3052 for (i = 0; i < words; i++)
3053 buf16[i] = cpu_to_le16(readw(mmio));
3054 }
Albert Lee6ae4cfb2005-08-12 14:15:34 +08003055
3056 /* Transfer trailing 1 byte, if any. */
3057 if (unlikely(buflen & 0x01)) {
3058 u16 align_buf[1] = { 0 };
3059 unsigned char *trailing_buf = buf + buflen - 1;
3060
3061 if (write_data) {
3062 memcpy(align_buf, trailing_buf, 1);
3063 writew(le16_to_cpu(align_buf[0]), mmio);
3064 } else {
3065 align_buf[0] = cpu_to_le16(readw(mmio));
3066 memcpy(trailing_buf, align_buf, 1);
3067 }
3068 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003069}
3070
Albert Lee6ae4cfb2005-08-12 14:15:34 +08003071/**
3072 * ata_pio_data_xfer - Transfer data by PIO
3073 * @ap: port to read/write
3074 * @buf: data buffer
3075 * @buflen: buffer length
Jeff Garzik344baba2005-09-07 01:15:17 -04003076 * @write_data: read/write
Albert Lee6ae4cfb2005-08-12 14:15:34 +08003077 *
3078 * Transfer data from/to the device data register by PIO.
3079 *
3080 * LOCKING:
3081 * Inherited from caller.
Albert Lee6ae4cfb2005-08-12 14:15:34 +08003082 */
3083
Linus Torvalds1da177e2005-04-16 15:20:36 -07003084static void ata_pio_data_xfer(struct ata_port *ap, unsigned char *buf,
3085 unsigned int buflen, int write_data)
3086{
Albert Lee6ae4cfb2005-08-12 14:15:34 +08003087 unsigned int words = buflen >> 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003088
Albert Lee6ae4cfb2005-08-12 14:15:34 +08003089 /* Transfer multiple of 2 bytes */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003090 if (write_data)
Albert Lee6ae4cfb2005-08-12 14:15:34 +08003091 outsw(ap->ioaddr.data_addr, buf, words);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003092 else
Albert Lee6ae4cfb2005-08-12 14:15:34 +08003093 insw(ap->ioaddr.data_addr, buf, words);
3094
3095 /* Transfer trailing 1 byte, if any. */
3096 if (unlikely(buflen & 0x01)) {
3097 u16 align_buf[1] = { 0 };
3098 unsigned char *trailing_buf = buf + buflen - 1;
3099
3100 if (write_data) {
3101 memcpy(align_buf, trailing_buf, 1);
3102 outw(le16_to_cpu(align_buf[0]), ap->ioaddr.data_addr);
3103 } else {
3104 align_buf[0] = cpu_to_le16(inw(ap->ioaddr.data_addr));
3105 memcpy(trailing_buf, align_buf, 1);
3106 }
3107 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003108}
3109
Albert Lee6ae4cfb2005-08-12 14:15:34 +08003110/**
3111 * ata_data_xfer - Transfer data from/to the data register.
3112 * @ap: port to read/write
3113 * @buf: data buffer
3114 * @buflen: buffer length
3115 * @do_write: read/write
3116 *
3117 * Transfer data from/to the device data register.
3118 *
3119 * LOCKING:
3120 * Inherited from caller.
Albert Lee6ae4cfb2005-08-12 14:15:34 +08003121 */
3122
Linus Torvalds1da177e2005-04-16 15:20:36 -07003123static void ata_data_xfer(struct ata_port *ap, unsigned char *buf,
3124 unsigned int buflen, int do_write)
3125{
Alan Coxa1bd9e62006-01-17 20:53:50 +00003126 /* Make the crap hardware pay the costs not the good stuff */
3127 if (unlikely(ap->flags & ATA_FLAG_IRQ_MASK)) {
3128 unsigned long flags;
3129 local_irq_save(flags);
3130 if (ap->flags & ATA_FLAG_MMIO)
3131 ata_mmio_data_xfer(ap, buf, buflen, do_write);
3132 else
3133 ata_pio_data_xfer(ap, buf, buflen, do_write);
3134 local_irq_restore(flags);
3135 } else {
3136 if (ap->flags & ATA_FLAG_MMIO)
3137 ata_mmio_data_xfer(ap, buf, buflen, do_write);
3138 else
3139 ata_pio_data_xfer(ap, buf, buflen, do_write);
3140 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003141}
3142
Albert Lee6ae4cfb2005-08-12 14:15:34 +08003143/**
3144 * ata_pio_sector - Transfer ATA_SECT_SIZE (512 bytes) of data.
3145 * @qc: Command on going
3146 *
3147 * Transfer ATA_SECT_SIZE of data from/to the ATA device.
3148 *
3149 * LOCKING:
3150 * Inherited from caller.
3151 */
3152
Linus Torvalds1da177e2005-04-16 15:20:36 -07003153static void ata_pio_sector(struct ata_queued_cmd *qc)
3154{
3155 int do_write = (qc->tf.flags & ATA_TFLAG_WRITE);
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003156 struct scatterlist *sg = qc->__sg;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003157 struct ata_port *ap = qc->ap;
3158 struct page *page;
3159 unsigned int offset;
3160 unsigned char *buf;
3161
3162 if (qc->cursect == (qc->nsect - 1))
Albert Lee14be71f2005-09-27 17:36:35 +08003163 ap->hsm_task_state = HSM_ST_LAST;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003164
3165 page = sg[qc->cursg].page;
3166 offset = sg[qc->cursg].offset + qc->cursg_ofs * ATA_SECT_SIZE;
3167
3168 /* get the current page and offset */
3169 page = nth_page(page, (offset >> PAGE_SHIFT));
3170 offset %= PAGE_SIZE;
3171
3172 buf = kmap(page) + offset;
3173
3174 qc->cursect++;
3175 qc->cursg_ofs++;
3176
Albert Lee32529e02005-05-26 03:49:42 -04003177 if ((qc->cursg_ofs * ATA_SECT_SIZE) == (&sg[qc->cursg])->length) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003178 qc->cursg++;
3179 qc->cursg_ofs = 0;
3180 }
3181
3182 DPRINTK("data %s\n", qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read");
3183
3184 /* do the actual data transfer */
3185 do_write = (qc->tf.flags & ATA_TFLAG_WRITE);
3186 ata_data_xfer(ap, buf, ATA_SECT_SIZE, do_write);
3187
3188 kunmap(page);
3189}
3190
Albert Lee6ae4cfb2005-08-12 14:15:34 +08003191/**
3192 * __atapi_pio_bytes - Transfer data from/to the ATAPI device.
3193 * @qc: Command on going
3194 * @bytes: number of bytes
3195 *
3196 * Transfer Transfer data from/to the ATAPI device.
3197 *
3198 * LOCKING:
3199 * Inherited from caller.
3200 *
3201 */
3202
Linus Torvalds1da177e2005-04-16 15:20:36 -07003203static void __atapi_pio_bytes(struct ata_queued_cmd *qc, unsigned int bytes)
3204{
3205 int do_write = (qc->tf.flags & ATA_TFLAG_WRITE);
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003206 struct scatterlist *sg = qc->__sg;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003207 struct ata_port *ap = qc->ap;
3208 struct page *page;
3209 unsigned char *buf;
3210 unsigned int offset, count;
3211
Albert Lee563a6e12005-08-12 14:17:50 +08003212 if (qc->curbytes + bytes >= qc->nbytes)
Albert Lee14be71f2005-09-27 17:36:35 +08003213 ap->hsm_task_state = HSM_ST_LAST;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003214
3215next_sg:
Albert Lee563a6e12005-08-12 14:17:50 +08003216 if (unlikely(qc->cursg >= qc->n_elem)) {
Jeff Garzik7fb6ec22005-09-16 06:01:48 -04003217 /*
Albert Lee563a6e12005-08-12 14:17:50 +08003218 * The end of qc->sg is reached and the device expects
3219 * more data to transfer. In order not to overrun qc->sg
3220 * and fulfill length specified in the byte count register,
3221 * - for read case, discard trailing data from the device
3222 * - for write case, padding zero data to the device
3223 */
3224 u16 pad_buf[1] = { 0 };
3225 unsigned int words = bytes >> 1;
3226 unsigned int i;
3227
3228 if (words) /* warning if bytes > 1 */
Jeff Garzik7fb6ec22005-09-16 06:01:48 -04003229 printk(KERN_WARNING "ata%u: %u bytes trailing data\n",
Albert Lee563a6e12005-08-12 14:17:50 +08003230 ap->id, bytes);
3231
3232 for (i = 0; i < words; i++)
3233 ata_data_xfer(ap, (unsigned char*)pad_buf, 2, do_write);
3234
Albert Lee14be71f2005-09-27 17:36:35 +08003235 ap->hsm_task_state = HSM_ST_LAST;
Albert Lee563a6e12005-08-12 14:17:50 +08003236 return;
3237 }
3238
Jeff Garzikcedc9a42005-10-05 07:13:30 -04003239 sg = &qc->__sg[qc->cursg];
Linus Torvalds1da177e2005-04-16 15:20:36 -07003240
Linus Torvalds1da177e2005-04-16 15:20:36 -07003241 page = sg->page;
3242 offset = sg->offset + qc->cursg_ofs;
3243
3244 /* get the current page and offset */
3245 page = nth_page(page, (offset >> PAGE_SHIFT));
3246 offset %= PAGE_SIZE;
3247
Albert Lee6952df02005-06-06 15:56:03 +08003248 /* don't overrun current sg */
Albert Lee32529e02005-05-26 03:49:42 -04003249 count = min(sg->length - qc->cursg_ofs, bytes);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003250
3251 /* don't cross page boundaries */
3252 count = min(count, (unsigned int)PAGE_SIZE - offset);
3253
3254 buf = kmap(page) + offset;
3255
3256 bytes -= count;
3257 qc->curbytes += count;
3258 qc->cursg_ofs += count;
3259
Albert Lee32529e02005-05-26 03:49:42 -04003260 if (qc->cursg_ofs == sg->length) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003261 qc->cursg++;
3262 qc->cursg_ofs = 0;
3263 }
3264
3265 DPRINTK("data %s\n", qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read");
3266
3267 /* do the actual data transfer */
3268 ata_data_xfer(ap, buf, count, do_write);
3269
3270 kunmap(page);
3271
Albert Lee563a6e12005-08-12 14:17:50 +08003272 if (bytes)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003273 goto next_sg;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003274}
3275
Albert Lee6ae4cfb2005-08-12 14:15:34 +08003276/**
3277 * atapi_pio_bytes - Transfer data from/to the ATAPI device.
3278 * @qc: Command on going
3279 *
3280 * Transfer Transfer data from/to the ATAPI device.
3281 *
3282 * LOCKING:
3283 * Inherited from caller.
Albert Lee6ae4cfb2005-08-12 14:15:34 +08003284 */
3285
Linus Torvalds1da177e2005-04-16 15:20:36 -07003286static void atapi_pio_bytes(struct ata_queued_cmd *qc)
3287{
3288 struct ata_port *ap = qc->ap;
3289 struct ata_device *dev = qc->dev;
3290 unsigned int ireason, bc_lo, bc_hi, bytes;
3291 int i_write, do_write = (qc->tf.flags & ATA_TFLAG_WRITE) ? 1 : 0;
3292
3293 ap->ops->tf_read(ap, &qc->tf);
3294 ireason = qc->tf.nsect;
3295 bc_lo = qc->tf.lbam;
3296 bc_hi = qc->tf.lbah;
3297 bytes = (bc_hi << 8) | bc_lo;
3298
3299 /* shall be cleared to zero, indicating xfer of data */
3300 if (ireason & (1 << 0))
3301 goto err_out;
3302
3303 /* make sure transfer direction matches expected */
3304 i_write = ((ireason & (1 << 1)) == 0) ? 1 : 0;
3305 if (do_write != i_write)
3306 goto err_out;
3307
3308 __atapi_pio_bytes(qc, bytes);
3309
3310 return;
3311
3312err_out:
3313 printk(KERN_INFO "ata%u: dev %u: ATAPI check failed\n",
3314 ap->id, dev->devno);
Tejun Heo11a56d22006-01-23 13:09:36 +09003315 qc->err_mask |= AC_ERR_HSM;
Albert Lee14be71f2005-09-27 17:36:35 +08003316 ap->hsm_task_state = HSM_ST_ERR;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003317}
3318
3319/**
Randy Dunlap6f0ef4f2005-10-25 01:44:30 -04003320 * ata_pio_block - start PIO on a block
3321 * @ap: the target ata_port
Linus Torvalds1da177e2005-04-16 15:20:36 -07003322 *
3323 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04003324 * None. (executing in kernel thread context)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003325 */
3326
3327static void ata_pio_block(struct ata_port *ap)
3328{
3329 struct ata_queued_cmd *qc;
3330 u8 status;
3331
3332 /*
Randy Dunlap6f0ef4f2005-10-25 01:44:30 -04003333 * This is purely heuristic. This is a fast path.
Linus Torvalds1da177e2005-04-16 15:20:36 -07003334 * Sometimes when we enter, BSY will be cleared in
3335 * a chk-status or two. If not, the drive is probably seeking
3336 * or something. Snooze for a couple msecs, then
3337 * chk-status again. If still busy, fall back to
Albert Lee14be71f2005-09-27 17:36:35 +08003338 * HSM_ST_POLL state.
Linus Torvalds1da177e2005-04-16 15:20:36 -07003339 */
3340 status = ata_busy_wait(ap, ATA_BUSY, 5);
3341 if (status & ATA_BUSY) {
3342 msleep(2);
3343 status = ata_busy_wait(ap, ATA_BUSY, 10);
3344 if (status & ATA_BUSY) {
Albert Lee14be71f2005-09-27 17:36:35 +08003345 ap->hsm_task_state = HSM_ST_POLL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003346 ap->pio_task_timeout = jiffies + ATA_TMOUT_PIO;
3347 return;
3348 }
3349 }
3350
3351 qc = ata_qc_from_tag(ap, ap->active_tag);
3352 assert(qc != NULL);
3353
Albert Leefe79e682005-12-06 11:34:59 +08003354 /* check error */
3355 if (status & (ATA_ERR | ATA_DF)) {
3356 qc->err_mask |= AC_ERR_DEV;
3357 ap->hsm_task_state = HSM_ST_ERR;
3358 return;
3359 }
3360
3361 /* transfer data if any */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003362 if (is_atapi_taskfile(&qc->tf)) {
Albert Leefe79e682005-12-06 11:34:59 +08003363 /* DRQ=0 means no more data to transfer */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003364 if ((status & ATA_DRQ) == 0) {
Albert Lee14be71f2005-09-27 17:36:35 +08003365 ap->hsm_task_state = HSM_ST_LAST;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003366 return;
3367 }
3368
3369 atapi_pio_bytes(qc);
3370 } else {
3371 /* handle BSY=0, DRQ=0 as error */
3372 if ((status & ATA_DRQ) == 0) {
Tejun Heo11a56d22006-01-23 13:09:36 +09003373 qc->err_mask |= AC_ERR_HSM;
Albert Lee14be71f2005-09-27 17:36:35 +08003374 ap->hsm_task_state = HSM_ST_ERR;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003375 return;
3376 }
3377
3378 ata_pio_sector(qc);
3379 }
3380}
3381
3382static void ata_pio_error(struct ata_port *ap)
3383{
3384 struct ata_queued_cmd *qc;
Jeff Garzika7dac442005-10-30 04:44:42 -05003385
3386 printk(KERN_WARNING "ata%u: PIO error\n", ap->id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003387
3388 qc = ata_qc_from_tag(ap, ap->active_tag);
3389 assert(qc != NULL);
3390
Albert Lee1c848982005-12-05 15:40:15 +08003391 /* make sure qc->err_mask is available to
3392 * know what's wrong and recover
3393 */
3394 assert(qc->err_mask);
3395
Albert Lee14be71f2005-09-27 17:36:35 +08003396 ap->hsm_task_state = HSM_ST_IDLE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003397
Albert Leea22e2eb2005-12-05 15:38:02 +08003398 ata_poll_qc_complete(qc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003399}
3400
3401static void ata_pio_task(void *_data)
3402{
3403 struct ata_port *ap = _data;
Jeff Garzik7fb6ec22005-09-16 06:01:48 -04003404 unsigned long timeout;
3405 int qc_completed;
3406
3407fsm_start:
3408 timeout = 0;
3409 qc_completed = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003410
Albert Lee14be71f2005-09-27 17:36:35 +08003411 switch (ap->hsm_task_state) {
3412 case HSM_ST_IDLE:
Linus Torvalds1da177e2005-04-16 15:20:36 -07003413 return;
3414
Albert Lee14be71f2005-09-27 17:36:35 +08003415 case HSM_ST:
Linus Torvalds1da177e2005-04-16 15:20:36 -07003416 ata_pio_block(ap);
3417 break;
3418
Albert Lee14be71f2005-09-27 17:36:35 +08003419 case HSM_ST_LAST:
Jeff Garzik7fb6ec22005-09-16 06:01:48 -04003420 qc_completed = ata_pio_complete(ap);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003421 break;
3422
Albert Lee14be71f2005-09-27 17:36:35 +08003423 case HSM_ST_POLL:
3424 case HSM_ST_LAST_POLL:
Linus Torvalds1da177e2005-04-16 15:20:36 -07003425 timeout = ata_pio_poll(ap);
3426 break;
3427
Albert Lee14be71f2005-09-27 17:36:35 +08003428 case HSM_ST_TMOUT:
3429 case HSM_ST_ERR:
Linus Torvalds1da177e2005-04-16 15:20:36 -07003430 ata_pio_error(ap);
3431 return;
3432 }
3433
3434 if (timeout)
Tejun Heo95064372006-01-23 13:09:37 +09003435 ata_queue_delayed_pio_task(ap, timeout);
Jeff Garzik7fb6ec22005-09-16 06:01:48 -04003436 else if (!qc_completed)
3437 goto fsm_start;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003438}
3439
Linus Torvalds1da177e2005-04-16 15:20:36 -07003440/**
3441 * ata_qc_timeout - Handle timeout of queued command
3442 * @qc: Command that timed out
3443 *
3444 * Some part of the kernel (currently, only the SCSI layer)
3445 * has noticed that the active command on port @ap has not
3446 * completed after a specified length of time. Handle this
3447 * condition by disabling DMA (if necessary) and completing
3448 * transactions, with error if necessary.
3449 *
3450 * This also handles the case of the "lost interrupt", where
3451 * for some reason (possibly hardware bug, possibly driver bug)
3452 * an interrupt was not delivered to the driver, even though the
3453 * transaction completed successfully.
3454 *
3455 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04003456 * Inherited from SCSI layer (none, can sleep)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003457 */
3458
3459static void ata_qc_timeout(struct ata_queued_cmd *qc)
3460{
3461 struct ata_port *ap = qc->ap;
Jeff Garzikb8f61532005-08-25 22:01:20 -04003462 struct ata_host_set *host_set = ap->host_set;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003463 u8 host_stat = 0, drv_stat;
Jeff Garzikb8f61532005-08-25 22:01:20 -04003464 unsigned long flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003465
3466 DPRINTK("ENTER\n");
3467
Jeff Garzikb8f61532005-08-25 22:01:20 -04003468 spin_lock_irqsave(&host_set->lock, flags);
3469
Linus Torvalds1da177e2005-04-16 15:20:36 -07003470 switch (qc->tf.protocol) {
3471
3472 case ATA_PROT_DMA:
3473 case ATA_PROT_ATAPI_DMA:
3474 host_stat = ap->ops->bmdma_status(ap);
3475
3476 /* before we do anything else, clear DMA-Start bit */
Alan Coxb73fc892005-08-26 16:03:19 +01003477 ap->ops->bmdma_stop(qc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003478
3479 /* fall through */
3480
3481 default:
3482 ata_altstatus(ap);
3483 drv_stat = ata_chk_status(ap);
3484
3485 /* ack bmdma irq events */
3486 ap->ops->irq_clear(ap);
3487
3488 printk(KERN_ERR "ata%u: command 0x%x timeout, stat 0x%x host_stat 0x%x\n",
3489 ap->id, qc->tf.command, drv_stat, host_stat);
3490
3491 /* complete taskfile transaction */
Albert Leea22e2eb2005-12-05 15:38:02 +08003492 qc->err_mask |= ac_err_mask(drv_stat);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003493 break;
3494 }
Jeff Garzikb8f61532005-08-25 22:01:20 -04003495
3496 spin_unlock_irqrestore(&host_set->lock, flags);
3497
Tejun Heoa72ec4c2006-01-23 13:09:37 +09003498 ata_eh_qc_complete(qc);
3499
Linus Torvalds1da177e2005-04-16 15:20:36 -07003500 DPRINTK("EXIT\n");
3501}
3502
3503/**
3504 * ata_eng_timeout - Handle timeout of queued command
3505 * @ap: Port on which timed-out command is active
3506 *
3507 * Some part of the kernel (currently, only the SCSI layer)
3508 * has noticed that the active command on port @ap has not
3509 * completed after a specified length of time. Handle this
3510 * condition by disabling DMA (if necessary) and completing
3511 * transactions, with error if necessary.
3512 *
3513 * This also handles the case of the "lost interrupt", where
3514 * for some reason (possibly hardware bug, possibly driver bug)
3515 * an interrupt was not delivered to the driver, even though the
3516 * transaction completed successfully.
3517 *
3518 * LOCKING:
3519 * Inherited from SCSI layer (none, can sleep)
3520 */
3521
3522void ata_eng_timeout(struct ata_port *ap)
3523{
3524 struct ata_queued_cmd *qc;
3525
3526 DPRINTK("ENTER\n");
3527
3528 qc = ata_qc_from_tag(ap, ap->active_tag);
Jeff Garzike12669e2005-10-05 18:39:23 -04003529 if (qc)
3530 ata_qc_timeout(qc);
3531 else {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003532 printk(KERN_ERR "ata%u: BUG: timeout without command\n",
3533 ap->id);
3534 goto out;
3535 }
3536
Linus Torvalds1da177e2005-04-16 15:20:36 -07003537out:
3538 DPRINTK("EXIT\n");
3539}
3540
3541/**
3542 * ata_qc_new - Request an available ATA command, for queueing
3543 * @ap: Port associated with device @dev
3544 * @dev: Device from whom we request an available command structure
3545 *
3546 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04003547 * None.
Linus Torvalds1da177e2005-04-16 15:20:36 -07003548 */
3549
3550static struct ata_queued_cmd *ata_qc_new(struct ata_port *ap)
3551{
3552 struct ata_queued_cmd *qc = NULL;
3553 unsigned int i;
3554
3555 for (i = 0; i < ATA_MAX_QUEUE; i++)
3556 if (!test_and_set_bit(i, &ap->qactive)) {
3557 qc = ata_qc_from_tag(ap, i);
3558 break;
3559 }
3560
3561 if (qc)
3562 qc->tag = i;
3563
3564 return qc;
3565}
3566
3567/**
3568 * ata_qc_new_init - Request an available ATA command, and initialize it
3569 * @ap: Port associated with device @dev
3570 * @dev: Device from whom we request an available command structure
3571 *
3572 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04003573 * None.
Linus Torvalds1da177e2005-04-16 15:20:36 -07003574 */
3575
3576struct ata_queued_cmd *ata_qc_new_init(struct ata_port *ap,
3577 struct ata_device *dev)
3578{
3579 struct ata_queued_cmd *qc;
3580
3581 qc = ata_qc_new(ap);
3582 if (qc) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003583 qc->scsicmd = NULL;
3584 qc->ap = ap;
3585 qc->dev = dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003586
Jeff Garzik2c13b7c2005-11-14 14:14:16 -05003587 ata_qc_reinit(qc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003588 }
3589
3590 return qc;
3591}
3592
Linus Torvalds1da177e2005-04-16 15:20:36 -07003593/**
3594 * ata_qc_free - free unused ata_queued_cmd
3595 * @qc: Command to complete
3596 *
3597 * Designed to free unused ata_queued_cmd object
3598 * in case something prevents using it.
3599 *
3600 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04003601 * spin_lock_irqsave(host_set lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003602 */
3603void ata_qc_free(struct ata_queued_cmd *qc)
3604{
Tejun Heo4ba946e2006-01-23 13:09:36 +09003605 struct ata_port *ap = qc->ap;
3606 unsigned int tag;
3607
Linus Torvalds1da177e2005-04-16 15:20:36 -07003608 assert(qc != NULL); /* ata_qc_from_tag _might_ return NULL */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003609
Tejun Heo4ba946e2006-01-23 13:09:36 +09003610 qc->flags = 0;
3611 tag = qc->tag;
3612 if (likely(ata_tag_valid(tag))) {
3613 if (tag == ap->active_tag)
3614 ap->active_tag = ATA_TAG_POISON;
3615 qc->tag = ATA_TAG_POISON;
3616 clear_bit(tag, &ap->qactive);
3617 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003618}
3619
3620/**
3621 * ata_qc_complete - Complete an active ATA command
3622 * @qc: Command to complete
Randy Dunlap8e8b77d2005-11-01 21:29:27 -08003623 * @err_mask: ATA Status register contents
Jeff Garzik0cba6322005-05-30 19:49:12 -04003624 *
3625 * Indicate to the mid and upper layers that an ATA
3626 * command has completed, with either an ok or not-ok status.
Linus Torvalds1da177e2005-04-16 15:20:36 -07003627 *
3628 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04003629 * spin_lock_irqsave(host_set lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003630 */
3631
Albert Leea22e2eb2005-12-05 15:38:02 +08003632void ata_qc_complete(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003633{
Linus Torvalds1da177e2005-04-16 15:20:36 -07003634 assert(qc != NULL); /* ata_qc_from_tag _might_ return NULL */
3635 assert(qc->flags & ATA_QCFLAG_ACTIVE);
3636
3637 if (likely(qc->flags & ATA_QCFLAG_DMAMAP))
3638 ata_sg_clean(qc);
3639
Albert Lee3f3791d2005-08-16 14:25:38 +08003640 /* atapi: mark qc as inactive to prevent the interrupt handler
3641 * from completing the command twice later, before the error handler
3642 * is called. (when rc != 0 and atapi request sense is needed)
3643 */
3644 qc->flags &= ~ATA_QCFLAG_ACTIVE;
3645
Linus Torvalds1da177e2005-04-16 15:20:36 -07003646 /* call completion callback */
Tejun Heo77853bf2006-01-23 13:09:36 +09003647 qc->complete_fn(qc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003648}
3649
3650static inline int ata_should_dma_map(struct ata_queued_cmd *qc)
3651{
3652 struct ata_port *ap = qc->ap;
3653
3654 switch (qc->tf.protocol) {
3655 case ATA_PROT_DMA:
3656 case ATA_PROT_ATAPI_DMA:
3657 return 1;
3658
3659 case ATA_PROT_ATAPI:
3660 case ATA_PROT_PIO:
3661 case ATA_PROT_PIO_MULT:
3662 if (ap->flags & ATA_FLAG_PIO_DMA)
3663 return 1;
3664
3665 /* fall through */
3666
3667 default:
3668 return 0;
3669 }
3670
3671 /* never reached */
3672}
3673
3674/**
3675 * ata_qc_issue - issue taskfile to device
3676 * @qc: command to issue to device
3677 *
3678 * Prepare an ATA command to submission to device.
3679 * This includes mapping the data into a DMA-able
3680 * area, filling in the S/G table, and finally
3681 * writing the taskfile to hardware, starting the command.
3682 *
3683 * LOCKING:
3684 * spin_lock_irqsave(host_set lock)
3685 *
3686 * RETURNS:
Tejun Heo9a3d9eb2006-01-23 13:09:36 +09003687 * Zero on success, AC_ERR_* mask on failure
Linus Torvalds1da177e2005-04-16 15:20:36 -07003688 */
3689
Tejun Heo9a3d9eb2006-01-23 13:09:36 +09003690unsigned int ata_qc_issue(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003691{
3692 struct ata_port *ap = qc->ap;
3693
3694 if (ata_should_dma_map(qc)) {
3695 if (qc->flags & ATA_QCFLAG_SG) {
3696 if (ata_sg_setup(qc))
Tejun Heo8e436af2006-01-23 13:09:36 +09003697 goto sg_err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003698 } else if (qc->flags & ATA_QCFLAG_SINGLE) {
3699 if (ata_sg_setup_one(qc))
Tejun Heo8e436af2006-01-23 13:09:36 +09003700 goto sg_err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003701 }
3702 } else {
3703 qc->flags &= ~ATA_QCFLAG_DMAMAP;
3704 }
3705
3706 ap->ops->qc_prep(qc);
3707
3708 qc->ap->active_tag = qc->tag;
3709 qc->flags |= ATA_QCFLAG_ACTIVE;
3710
3711 return ap->ops->qc_issue(qc);
3712
Tejun Heo8e436af2006-01-23 13:09:36 +09003713sg_err:
3714 qc->flags &= ~ATA_QCFLAG_DMAMAP;
Tejun Heo9a3d9eb2006-01-23 13:09:36 +09003715 return AC_ERR_SYSTEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003716}
3717
Edward Falk0baab862005-06-02 18:17:13 -04003718
Linus Torvalds1da177e2005-04-16 15:20:36 -07003719/**
3720 * ata_qc_issue_prot - issue taskfile to device in proto-dependent manner
3721 * @qc: command to issue to device
3722 *
3723 * Using various libata functions and hooks, this function
3724 * starts an ATA command. ATA commands are grouped into
3725 * classes called "protocols", and issuing each type of protocol
3726 * is slightly different.
3727 *
Edward Falk0baab862005-06-02 18:17:13 -04003728 * May be used as the qc_issue() entry in ata_port_operations.
3729 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07003730 * LOCKING:
3731 * spin_lock_irqsave(host_set lock)
3732 *
3733 * RETURNS:
Tejun Heo9a3d9eb2006-01-23 13:09:36 +09003734 * Zero on success, AC_ERR_* mask on failure
Linus Torvalds1da177e2005-04-16 15:20:36 -07003735 */
3736
Tejun Heo9a3d9eb2006-01-23 13:09:36 +09003737unsigned int ata_qc_issue_prot(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003738{
3739 struct ata_port *ap = qc->ap;
3740
3741 ata_dev_select(ap, qc->dev->devno, 1, 0);
3742
3743 switch (qc->tf.protocol) {
3744 case ATA_PROT_NODATA:
Jeff Garzike5338252005-10-30 21:37:17 -05003745 ata_tf_to_host(ap, &qc->tf);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003746 break;
3747
3748 case ATA_PROT_DMA:
3749 ap->ops->tf_load(ap, &qc->tf); /* load tf registers */
3750 ap->ops->bmdma_setup(qc); /* set up bmdma */
3751 ap->ops->bmdma_start(qc); /* initiate bmdma */
3752 break;
3753
3754 case ATA_PROT_PIO: /* load tf registers, initiate polling pio */
3755 ata_qc_set_polling(qc);
Jeff Garzike5338252005-10-30 21:37:17 -05003756 ata_tf_to_host(ap, &qc->tf);
Albert Lee14be71f2005-09-27 17:36:35 +08003757 ap->hsm_task_state = HSM_ST;
Tejun Heo95064372006-01-23 13:09:37 +09003758 ata_queue_pio_task(ap);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003759 break;
3760
3761 case ATA_PROT_ATAPI:
3762 ata_qc_set_polling(qc);
Jeff Garzike5338252005-10-30 21:37:17 -05003763 ata_tf_to_host(ap, &qc->tf);
Tejun Heo95064372006-01-23 13:09:37 +09003764 ata_queue_packet_task(ap);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003765 break;
3766
3767 case ATA_PROT_ATAPI_NODATA:
Tejun Heoc1389502005-08-22 14:59:24 +09003768 ap->flags |= ATA_FLAG_NOINTR;
Jeff Garzike5338252005-10-30 21:37:17 -05003769 ata_tf_to_host(ap, &qc->tf);
Tejun Heo95064372006-01-23 13:09:37 +09003770 ata_queue_packet_task(ap);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003771 break;
3772
3773 case ATA_PROT_ATAPI_DMA:
Tejun Heoc1389502005-08-22 14:59:24 +09003774 ap->flags |= ATA_FLAG_NOINTR;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003775 ap->ops->tf_load(ap, &qc->tf); /* load tf registers */
3776 ap->ops->bmdma_setup(qc); /* set up bmdma */
Tejun Heo95064372006-01-23 13:09:37 +09003777 ata_queue_packet_task(ap);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003778 break;
3779
3780 default:
3781 WARN_ON(1);
Tejun Heo9a3d9eb2006-01-23 13:09:36 +09003782 return AC_ERR_SYSTEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003783 }
3784
3785 return 0;
3786}
3787
3788/**
Edward Falk0baab862005-06-02 18:17:13 -04003789 * ata_bmdma_setup_mmio - Set up PCI IDE BMDMA transaction
Linus Torvalds1da177e2005-04-16 15:20:36 -07003790 * @qc: Info associated with this ATA transaction.
3791 *
3792 * LOCKING:
3793 * spin_lock_irqsave(host_set lock)
3794 */
3795
3796static void ata_bmdma_setup_mmio (struct ata_queued_cmd *qc)
3797{
3798 struct ata_port *ap = qc->ap;
3799 unsigned int rw = (qc->tf.flags & ATA_TFLAG_WRITE);
3800 u8 dmactl;
3801 void __iomem *mmio = (void __iomem *) ap->ioaddr.bmdma_addr;
3802
3803 /* load PRD table addr. */
3804 mb(); /* make sure PRD table writes are visible to controller */
3805 writel(ap->prd_dma, mmio + ATA_DMA_TABLE_OFS);
3806
3807 /* specify data direction, triple-check start bit is clear */
3808 dmactl = readb(mmio + ATA_DMA_CMD);
3809 dmactl &= ~(ATA_DMA_WR | ATA_DMA_START);
3810 if (!rw)
3811 dmactl |= ATA_DMA_WR;
3812 writeb(dmactl, mmio + ATA_DMA_CMD);
3813
3814 /* issue r/w command */
3815 ap->ops->exec_command(ap, &qc->tf);
3816}
3817
3818/**
Alan Coxb73fc892005-08-26 16:03:19 +01003819 * ata_bmdma_start_mmio - Start a PCI IDE BMDMA transaction
Linus Torvalds1da177e2005-04-16 15:20:36 -07003820 * @qc: Info associated with this ATA transaction.
3821 *
3822 * LOCKING:
3823 * spin_lock_irqsave(host_set lock)
3824 */
3825
3826static void ata_bmdma_start_mmio (struct ata_queued_cmd *qc)
3827{
3828 struct ata_port *ap = qc->ap;
3829 void __iomem *mmio = (void __iomem *) ap->ioaddr.bmdma_addr;
3830 u8 dmactl;
3831
3832 /* start host DMA transaction */
3833 dmactl = readb(mmio + ATA_DMA_CMD);
3834 writeb(dmactl | ATA_DMA_START, mmio + ATA_DMA_CMD);
3835
3836 /* Strictly, one may wish to issue a readb() here, to
3837 * flush the mmio write. However, control also passes
3838 * to the hardware at this point, and it will interrupt
3839 * us when we are to resume control. So, in effect,
3840 * we don't care when the mmio write flushes.
3841 * Further, a read of the DMA status register _immediately_
3842 * following the write may not be what certain flaky hardware
3843 * is expected, so I think it is best to not add a readb()
3844 * without first all the MMIO ATA cards/mobos.
3845 * Or maybe I'm just being paranoid.
3846 */
3847}
3848
3849/**
3850 * ata_bmdma_setup_pio - Set up PCI IDE BMDMA transaction (PIO)
3851 * @qc: Info associated with this ATA transaction.
3852 *
3853 * LOCKING:
3854 * spin_lock_irqsave(host_set lock)
3855 */
3856
3857static void ata_bmdma_setup_pio (struct ata_queued_cmd *qc)
3858{
3859 struct ata_port *ap = qc->ap;
3860 unsigned int rw = (qc->tf.flags & ATA_TFLAG_WRITE);
3861 u8 dmactl;
3862
3863 /* load PRD table addr. */
3864 outl(ap->prd_dma, ap->ioaddr.bmdma_addr + ATA_DMA_TABLE_OFS);
3865
3866 /* specify data direction, triple-check start bit is clear */
3867 dmactl = inb(ap->ioaddr.bmdma_addr + ATA_DMA_CMD);
3868 dmactl &= ~(ATA_DMA_WR | ATA_DMA_START);
3869 if (!rw)
3870 dmactl |= ATA_DMA_WR;
3871 outb(dmactl, ap->ioaddr.bmdma_addr + ATA_DMA_CMD);
3872
3873 /* issue r/w command */
3874 ap->ops->exec_command(ap, &qc->tf);
3875}
3876
3877/**
3878 * ata_bmdma_start_pio - Start a PCI IDE BMDMA transaction (PIO)
3879 * @qc: Info associated with this ATA transaction.
3880 *
3881 * LOCKING:
3882 * spin_lock_irqsave(host_set lock)
3883 */
3884
3885static void ata_bmdma_start_pio (struct ata_queued_cmd *qc)
3886{
3887 struct ata_port *ap = qc->ap;
3888 u8 dmactl;
3889
3890 /* start host DMA transaction */
3891 dmactl = inb(ap->ioaddr.bmdma_addr + ATA_DMA_CMD);
3892 outb(dmactl | ATA_DMA_START,
3893 ap->ioaddr.bmdma_addr + ATA_DMA_CMD);
3894}
3895
Edward Falk0baab862005-06-02 18:17:13 -04003896
3897/**
3898 * ata_bmdma_start - Start a PCI IDE BMDMA transaction
3899 * @qc: Info associated with this ATA transaction.
3900 *
3901 * Writes the ATA_DMA_START flag to the DMA command register.
3902 *
3903 * May be used as the bmdma_start() entry in ata_port_operations.
3904 *
3905 * LOCKING:
3906 * spin_lock_irqsave(host_set lock)
3907 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003908void ata_bmdma_start(struct ata_queued_cmd *qc)
3909{
3910 if (qc->ap->flags & ATA_FLAG_MMIO)
3911 ata_bmdma_start_mmio(qc);
3912 else
3913 ata_bmdma_start_pio(qc);
3914}
3915
Edward Falk0baab862005-06-02 18:17:13 -04003916
3917/**
3918 * ata_bmdma_setup - Set up PCI IDE BMDMA transaction
3919 * @qc: Info associated with this ATA transaction.
3920 *
3921 * Writes address of PRD table to device's PRD Table Address
3922 * register, sets the DMA control register, and calls
3923 * ops->exec_command() to start the transfer.
3924 *
3925 * May be used as the bmdma_setup() entry in ata_port_operations.
3926 *
3927 * LOCKING:
3928 * spin_lock_irqsave(host_set lock)
3929 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003930void ata_bmdma_setup(struct ata_queued_cmd *qc)
3931{
3932 if (qc->ap->flags & ATA_FLAG_MMIO)
3933 ata_bmdma_setup_mmio(qc);
3934 else
3935 ata_bmdma_setup_pio(qc);
3936}
3937
Edward Falk0baab862005-06-02 18:17:13 -04003938
3939/**
3940 * ata_bmdma_irq_clear - Clear PCI IDE BMDMA interrupt.
Jeff Garzikdecc6d02005-06-02 18:42:33 -04003941 * @ap: Port associated with this ATA transaction.
Edward Falk0baab862005-06-02 18:17:13 -04003942 *
3943 * Clear interrupt and error flags in DMA status register.
3944 *
3945 * May be used as the irq_clear() entry in ata_port_operations.
3946 *
3947 * LOCKING:
3948 * spin_lock_irqsave(host_set lock)
3949 */
3950
Linus Torvalds1da177e2005-04-16 15:20:36 -07003951void ata_bmdma_irq_clear(struct ata_port *ap)
3952{
3953 if (ap->flags & ATA_FLAG_MMIO) {
3954 void __iomem *mmio = ((void __iomem *) ap->ioaddr.bmdma_addr) + ATA_DMA_STATUS;
3955 writeb(readb(mmio), mmio);
3956 } else {
3957 unsigned long addr = ap->ioaddr.bmdma_addr + ATA_DMA_STATUS;
3958 outb(inb(addr), addr);
3959 }
3960
3961}
3962
Edward Falk0baab862005-06-02 18:17:13 -04003963
3964/**
3965 * ata_bmdma_status - Read PCI IDE BMDMA status
Jeff Garzikdecc6d02005-06-02 18:42:33 -04003966 * @ap: Port associated with this ATA transaction.
Edward Falk0baab862005-06-02 18:17:13 -04003967 *
3968 * Read and return BMDMA status register.
3969 *
3970 * May be used as the bmdma_status() entry in ata_port_operations.
3971 *
3972 * LOCKING:
3973 * spin_lock_irqsave(host_set lock)
3974 */
3975
Linus Torvalds1da177e2005-04-16 15:20:36 -07003976u8 ata_bmdma_status(struct ata_port *ap)
3977{
3978 u8 host_stat;
3979 if (ap->flags & ATA_FLAG_MMIO) {
3980 void __iomem *mmio = (void __iomem *) ap->ioaddr.bmdma_addr;
3981 host_stat = readb(mmio + ATA_DMA_STATUS);
3982 } else
Albert Leeee500aa2005-09-27 17:34:38 +08003983 host_stat = inb(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003984 return host_stat;
3985}
3986
Edward Falk0baab862005-06-02 18:17:13 -04003987
3988/**
3989 * ata_bmdma_stop - Stop PCI IDE BMDMA transfer
Alan Coxb73fc892005-08-26 16:03:19 +01003990 * @qc: Command we are ending DMA for
Edward Falk0baab862005-06-02 18:17:13 -04003991 *
3992 * Clears the ATA_DMA_START flag in the dma control register
3993 *
3994 * May be used as the bmdma_stop() entry in ata_port_operations.
3995 *
3996 * LOCKING:
3997 * spin_lock_irqsave(host_set lock)
3998 */
3999
Alan Coxb73fc892005-08-26 16:03:19 +01004000void ata_bmdma_stop(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004001{
Alan Coxb73fc892005-08-26 16:03:19 +01004002 struct ata_port *ap = qc->ap;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004003 if (ap->flags & ATA_FLAG_MMIO) {
4004 void __iomem *mmio = (void __iomem *) ap->ioaddr.bmdma_addr;
4005
4006 /* clear start/stop bit */
4007 writeb(readb(mmio + ATA_DMA_CMD) & ~ATA_DMA_START,
4008 mmio + ATA_DMA_CMD);
4009 } else {
4010 /* clear start/stop bit */
4011 outb(inb(ap->ioaddr.bmdma_addr + ATA_DMA_CMD) & ~ATA_DMA_START,
4012 ap->ioaddr.bmdma_addr + ATA_DMA_CMD);
4013 }
4014
4015 /* one-PIO-cycle guaranteed wait, per spec, for HDMA1:0 transition */
4016 ata_altstatus(ap); /* dummy read */
4017}
4018
4019/**
4020 * ata_host_intr - Handle host interrupt for given (port, task)
4021 * @ap: Port on which interrupt arrived (possibly...)
4022 * @qc: Taskfile currently active in engine
4023 *
4024 * Handle host interrupt for given queued command. Currently,
4025 * only DMA interrupts are handled. All other commands are
4026 * handled via polling with interrupts disabled (nIEN bit).
4027 *
4028 * LOCKING:
4029 * spin_lock_irqsave(host_set lock)
4030 *
4031 * RETURNS:
4032 * One if interrupt was handled, zero if not (shared irq).
4033 */
4034
4035inline unsigned int ata_host_intr (struct ata_port *ap,
4036 struct ata_queued_cmd *qc)
4037{
4038 u8 status, host_stat;
4039
4040 switch (qc->tf.protocol) {
4041
4042 case ATA_PROT_DMA:
4043 case ATA_PROT_ATAPI_DMA:
4044 case ATA_PROT_ATAPI:
4045 /* check status of DMA engine */
4046 host_stat = ap->ops->bmdma_status(ap);
4047 VPRINTK("ata%u: host_stat 0x%X\n", ap->id, host_stat);
4048
4049 /* if it's not our irq... */
4050 if (!(host_stat & ATA_DMA_INTR))
4051 goto idle_irq;
4052
4053 /* before we do anything else, clear DMA-Start bit */
Alan Coxb73fc892005-08-26 16:03:19 +01004054 ap->ops->bmdma_stop(qc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004055
4056 /* fall through */
4057
4058 case ATA_PROT_ATAPI_NODATA:
4059 case ATA_PROT_NODATA:
4060 /* check altstatus */
4061 status = ata_altstatus(ap);
4062 if (status & ATA_BUSY)
4063 goto idle_irq;
4064
4065 /* check main status, clearing INTRQ */
4066 status = ata_chk_status(ap);
4067 if (unlikely(status & ATA_BUSY))
4068 goto idle_irq;
4069 DPRINTK("ata%u: protocol %d (dev_stat 0x%X)\n",
4070 ap->id, qc->tf.protocol, status);
4071
4072 /* ack bmdma irq events */
4073 ap->ops->irq_clear(ap);
4074
4075 /* complete taskfile transaction */
Albert Leea22e2eb2005-12-05 15:38:02 +08004076 qc->err_mask |= ac_err_mask(status);
4077 ata_qc_complete(qc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004078 break;
4079
4080 default:
4081 goto idle_irq;
4082 }
4083
4084 return 1; /* irq handled */
4085
4086idle_irq:
4087 ap->stats.idle_irq++;
4088
4089#ifdef ATA_IRQ_TRAP
4090 if ((ap->stats.idle_irq % 1000) == 0) {
4091 handled = 1;
4092 ata_irq_ack(ap, 0); /* debug trap */
4093 printk(KERN_WARNING "ata%d: irq trap\n", ap->id);
4094 }
4095#endif
4096 return 0; /* irq not handled */
4097}
4098
4099/**
4100 * ata_interrupt - Default ATA host interrupt handler
Jeff Garzik0cba6322005-05-30 19:49:12 -04004101 * @irq: irq line (unused)
4102 * @dev_instance: pointer to our ata_host_set information structure
Linus Torvalds1da177e2005-04-16 15:20:36 -07004103 * @regs: unused
4104 *
Jeff Garzik0cba6322005-05-30 19:49:12 -04004105 * Default interrupt handler for PCI IDE devices. Calls
4106 * ata_host_intr() for each port that is not disabled.
4107 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07004108 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04004109 * Obtains host_set lock during operation.
Linus Torvalds1da177e2005-04-16 15:20:36 -07004110 *
4111 * RETURNS:
Jeff Garzik0cba6322005-05-30 19:49:12 -04004112 * IRQ_NONE or IRQ_HANDLED.
Linus Torvalds1da177e2005-04-16 15:20:36 -07004113 */
4114
4115irqreturn_t ata_interrupt (int irq, void *dev_instance, struct pt_regs *regs)
4116{
4117 struct ata_host_set *host_set = dev_instance;
4118 unsigned int i;
4119 unsigned int handled = 0;
4120 unsigned long flags;
4121
4122 /* TODO: make _irqsave conditional on x86 PCI IDE legacy mode */
4123 spin_lock_irqsave(&host_set->lock, flags);
4124
4125 for (i = 0; i < host_set->n_ports; i++) {
4126 struct ata_port *ap;
4127
4128 ap = host_set->ports[i];
Tejun Heoc1389502005-08-22 14:59:24 +09004129 if (ap &&
4130 !(ap->flags & (ATA_FLAG_PORT_DISABLED | ATA_FLAG_NOINTR))) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07004131 struct ata_queued_cmd *qc;
4132
4133 qc = ata_qc_from_tag(ap, ap->active_tag);
Albert Lee21b1ed72005-04-29 17:34:59 +08004134 if (qc && (!(qc->tf.ctl & ATA_NIEN)) &&
4135 (qc->flags & ATA_QCFLAG_ACTIVE))
Linus Torvalds1da177e2005-04-16 15:20:36 -07004136 handled |= ata_host_intr(ap, qc);
4137 }
4138 }
4139
4140 spin_unlock_irqrestore(&host_set->lock, flags);
4141
4142 return IRQ_RETVAL(handled);
4143}
4144
4145/**
4146 * atapi_packet_task - Write CDB bytes to hardware
4147 * @_data: Port to which ATAPI device is attached.
4148 *
4149 * When device has indicated its readiness to accept
4150 * a CDB, this function is called. Send the CDB.
4151 * If DMA is to be performed, exit immediately.
4152 * Otherwise, we are in polling mode, so poll
4153 * status under operation succeeds or fails.
4154 *
4155 * LOCKING:
4156 * Kernel thread context (may sleep)
4157 */
4158
4159static void atapi_packet_task(void *_data)
4160{
4161 struct ata_port *ap = _data;
4162 struct ata_queued_cmd *qc;
4163 u8 status;
4164
4165 qc = ata_qc_from_tag(ap, ap->active_tag);
4166 assert(qc != NULL);
4167 assert(qc->flags & ATA_QCFLAG_ACTIVE);
4168
4169 /* sleep-wait for BSY to clear */
4170 DPRINTK("busy wait\n");
Albert Leed8fe4522005-12-05 15:42:17 +08004171 if (ata_busy_sleep(ap, ATA_TMOUT_CDB_QUICK, ATA_TMOUT_CDB)) {
Tejun Heo11a56d22006-01-23 13:09:36 +09004172 qc->err_mask |= AC_ERR_TIMEOUT;
Albert Leed8fe4522005-12-05 15:42:17 +08004173 goto err_out;
4174 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07004175
4176 /* make sure DRQ is set */
4177 status = ata_chk_status(ap);
Albert Leed8fe4522005-12-05 15:42:17 +08004178 if ((status & (ATA_BUSY | ATA_DRQ)) != ATA_DRQ) {
Tejun Heo11a56d22006-01-23 13:09:36 +09004179 qc->err_mask |= AC_ERR_HSM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004180 goto err_out;
Albert Leed8fe4522005-12-05 15:42:17 +08004181 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07004182
4183 /* send SCSI cdb */
4184 DPRINTK("send cdb\n");
4185 assert(ap->cdb_len >= 12);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004186
Tejun Heoc1389502005-08-22 14:59:24 +09004187 if (qc->tf.protocol == ATA_PROT_ATAPI_DMA ||
4188 qc->tf.protocol == ATA_PROT_ATAPI_NODATA) {
4189 unsigned long flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004190
Tejun Heoc1389502005-08-22 14:59:24 +09004191 /* Once we're done issuing command and kicking bmdma,
4192 * irq handler takes over. To not lose irq, we need
4193 * to clear NOINTR flag before sending cdb, but
4194 * interrupt handler shouldn't be invoked before we're
4195 * finished. Hence, the following locking.
4196 */
4197 spin_lock_irqsave(&ap->host_set->lock, flags);
4198 ap->flags &= ~ATA_FLAG_NOINTR;
4199 ata_data_xfer(ap, qc->cdb, ap->cdb_len, 1);
4200 if (qc->tf.protocol == ATA_PROT_ATAPI_DMA)
4201 ap->ops->bmdma_start(qc); /* initiate bmdma */
4202 spin_unlock_irqrestore(&ap->host_set->lock, flags);
4203 } else {
4204 ata_data_xfer(ap, qc->cdb, ap->cdb_len, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004205
Tejun Heoc1389502005-08-22 14:59:24 +09004206 /* PIO commands are handled by polling */
Albert Lee14be71f2005-09-27 17:36:35 +08004207 ap->hsm_task_state = HSM_ST;
Tejun Heo95064372006-01-23 13:09:37 +09004208 ata_queue_pio_task(ap);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004209 }
4210
4211 return;
4212
4213err_out:
Albert Leea22e2eb2005-12-05 15:38:02 +08004214 ata_poll_qc_complete(qc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004215}
4216
Edward Falk0baab862005-06-02 18:17:13 -04004217
4218/**
4219 * ata_port_start - Set port up for dma.
4220 * @ap: Port to initialize
4221 *
4222 * Called just after data structures for each port are
4223 * initialized. Allocates space for PRD table.
4224 *
4225 * May be used as the port_start() entry in ata_port_operations.
4226 *
4227 * LOCKING:
Randy Dunlap6f0ef4f2005-10-25 01:44:30 -04004228 * Inherited from caller.
Edward Falk0baab862005-06-02 18:17:13 -04004229 */
4230
Jens Axboe9b847542006-01-06 09:28:07 +01004231/*
4232 * Execute a 'simple' command, that only consists of the opcode 'cmd' itself,
4233 * without filling any other registers
4234 */
4235static int ata_do_simple_cmd(struct ata_port *ap, struct ata_device *dev,
4236 u8 cmd)
4237{
4238 struct ata_taskfile tf;
4239 int err;
4240
4241 ata_tf_init(ap, &tf, dev->devno);
4242
4243 tf.command = cmd;
4244 tf.flags |= ATA_TFLAG_DEVICE;
4245 tf.protocol = ATA_PROT_NODATA;
4246
4247 err = ata_exec_internal(ap, dev, &tf, DMA_NONE, NULL, 0);
4248 if (err)
4249 printk(KERN_ERR "%s: ata command failed: %d\n",
4250 __FUNCTION__, err);
4251
4252 return err;
4253}
4254
4255static int ata_flush_cache(struct ata_port *ap, struct ata_device *dev)
4256{
4257 u8 cmd;
4258
4259 if (!ata_try_flush_cache(dev))
4260 return 0;
4261
4262 if (ata_id_has_flush_ext(dev->id))
4263 cmd = ATA_CMD_FLUSH_EXT;
4264 else
4265 cmd = ATA_CMD_FLUSH;
4266
4267 return ata_do_simple_cmd(ap, dev, cmd);
4268}
4269
4270static int ata_standby_drive(struct ata_port *ap, struct ata_device *dev)
4271{
4272 return ata_do_simple_cmd(ap, dev, ATA_CMD_STANDBYNOW1);
4273}
4274
4275static int ata_start_drive(struct ata_port *ap, struct ata_device *dev)
4276{
4277 return ata_do_simple_cmd(ap, dev, ATA_CMD_IDLEIMMEDIATE);
4278}
4279
4280/**
4281 * ata_device_resume - wakeup a previously suspended devices
4282 *
4283 * Kick the drive back into action, by sending it an idle immediate
4284 * command and making sure its transfer mode matches between drive
4285 * and host.
4286 *
4287 */
4288int ata_device_resume(struct ata_port *ap, struct ata_device *dev)
4289{
4290 if (ap->flags & ATA_FLAG_SUSPENDED) {
4291 ap->flags &= ~ATA_FLAG_SUSPENDED;
4292 ata_set_mode(ap);
4293 }
4294 if (!ata_dev_present(dev))
4295 return 0;
4296 if (dev->class == ATA_DEV_ATA)
4297 ata_start_drive(ap, dev);
4298
4299 return 0;
4300}
4301
4302/**
4303 * ata_device_suspend - prepare a device for suspend
4304 *
4305 * Flush the cache on the drive, if appropriate, then issue a
4306 * standbynow command.
4307 *
4308 */
4309int ata_device_suspend(struct ata_port *ap, struct ata_device *dev)
4310{
4311 if (!ata_dev_present(dev))
4312 return 0;
4313 if (dev->class == ATA_DEV_ATA)
4314 ata_flush_cache(ap, dev);
4315
4316 ata_standby_drive(ap, dev);
4317 ap->flags |= ATA_FLAG_SUSPENDED;
4318 return 0;
4319}
4320
Linus Torvalds1da177e2005-04-16 15:20:36 -07004321int ata_port_start (struct ata_port *ap)
4322{
4323 struct device *dev = ap->host_set->dev;
Jeff Garzik6037d6b2005-11-04 22:08:00 -05004324 int rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004325
4326 ap->prd = dma_alloc_coherent(dev, ATA_PRD_TBL_SZ, &ap->prd_dma, GFP_KERNEL);
4327 if (!ap->prd)
4328 return -ENOMEM;
4329
Jeff Garzik6037d6b2005-11-04 22:08:00 -05004330 rc = ata_pad_alloc(ap, dev);
4331 if (rc) {
Jeff Garzikcedc9a42005-10-05 07:13:30 -04004332 dma_free_coherent(dev, ATA_PRD_TBL_SZ, ap->prd, ap->prd_dma);
Jeff Garzik6037d6b2005-11-04 22:08:00 -05004333 return rc;
Jeff Garzikcedc9a42005-10-05 07:13:30 -04004334 }
4335
Linus Torvalds1da177e2005-04-16 15:20:36 -07004336 DPRINTK("prd alloc, virt %p, dma %llx\n", ap->prd, (unsigned long long) ap->prd_dma);
4337
4338 return 0;
4339}
4340
Edward Falk0baab862005-06-02 18:17:13 -04004341
4342/**
4343 * ata_port_stop - Undo ata_port_start()
4344 * @ap: Port to shut down
4345 *
4346 * Frees the PRD table.
4347 *
4348 * May be used as the port_stop() entry in ata_port_operations.
4349 *
4350 * LOCKING:
Randy Dunlap6f0ef4f2005-10-25 01:44:30 -04004351 * Inherited from caller.
Edward Falk0baab862005-06-02 18:17:13 -04004352 */
4353
Linus Torvalds1da177e2005-04-16 15:20:36 -07004354void ata_port_stop (struct ata_port *ap)
4355{
4356 struct device *dev = ap->host_set->dev;
4357
4358 dma_free_coherent(dev, ATA_PRD_TBL_SZ, ap->prd, ap->prd_dma);
Jeff Garzik6037d6b2005-11-04 22:08:00 -05004359 ata_pad_free(ap, dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004360}
4361
Jeff Garzikaa8f0dc2005-05-26 21:54:27 -04004362void ata_host_stop (struct ata_host_set *host_set)
4363{
4364 if (host_set->mmio_base)
4365 iounmap(host_set->mmio_base);
4366}
4367
4368
Linus Torvalds1da177e2005-04-16 15:20:36 -07004369/**
4370 * ata_host_remove - Unregister SCSI host structure with upper layers
4371 * @ap: Port to unregister
4372 * @do_unregister: 1 if we fully unregister, 0 to just stop the port
4373 *
4374 * LOCKING:
Randy Dunlap6f0ef4f2005-10-25 01:44:30 -04004375 * Inherited from caller.
Linus Torvalds1da177e2005-04-16 15:20:36 -07004376 */
4377
4378static void ata_host_remove(struct ata_port *ap, unsigned int do_unregister)
4379{
4380 struct Scsi_Host *sh = ap->host;
4381
4382 DPRINTK("ENTER\n");
4383
4384 if (do_unregister)
4385 scsi_remove_host(sh);
4386
4387 ap->ops->port_stop(ap);
4388}
4389
4390/**
4391 * ata_host_init - Initialize an ata_port structure
4392 * @ap: Structure to initialize
4393 * @host: associated SCSI mid-layer structure
4394 * @host_set: Collection of hosts to which @ap belongs
4395 * @ent: Probe information provided by low-level driver
4396 * @port_no: Port number associated with this ata_port
4397 *
Jeff Garzik0cba6322005-05-30 19:49:12 -04004398 * Initialize a new ata_port structure, and its associated
4399 * scsi_host.
4400 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07004401 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04004402 * Inherited from caller.
Linus Torvalds1da177e2005-04-16 15:20:36 -07004403 */
4404
4405static void ata_host_init(struct ata_port *ap, struct Scsi_Host *host,
4406 struct ata_host_set *host_set,
Jeff Garzik057ace52005-10-22 14:27:05 -04004407 const struct ata_probe_ent *ent, unsigned int port_no)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004408{
4409 unsigned int i;
4410
4411 host->max_id = 16;
4412 host->max_lun = 1;
4413 host->max_channel = 1;
4414 host->unique_id = ata_unique_id++;
4415 host->max_cmd_len = 12;
Christoph Hellwig12413192005-06-11 01:05:01 +02004416
Linus Torvalds1da177e2005-04-16 15:20:36 -07004417 ap->flags = ATA_FLAG_PORT_DISABLED;
4418 ap->id = host->unique_id;
4419 ap->host = host;
4420 ap->ctl = ATA_DEVCTL_OBS;
4421 ap->host_set = host_set;
4422 ap->port_no = port_no;
4423 ap->hard_port_no =
4424 ent->legacy_mode ? ent->hard_port_no : port_no;
4425 ap->pio_mask = ent->pio_mask;
4426 ap->mwdma_mask = ent->mwdma_mask;
4427 ap->udma_mask = ent->udma_mask;
4428 ap->flags |= ent->host_flags;
4429 ap->ops = ent->port_ops;
4430 ap->cbl = ATA_CBL_NONE;
4431 ap->active_tag = ATA_TAG_POISON;
4432 ap->last_ctl = 0xFF;
4433
4434 INIT_WORK(&ap->packet_task, atapi_packet_task, ap);
4435 INIT_WORK(&ap->pio_task, ata_pio_task, ap);
Tejun Heoa72ec4c2006-01-23 13:09:37 +09004436 INIT_LIST_HEAD(&ap->eh_done_q);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004437
4438 for (i = 0; i < ATA_MAX_DEVICES; i++)
4439 ap->device[i].devno = i;
4440
4441#ifdef ATA_IRQ_TRAP
4442 ap->stats.unhandled_irq = 1;
4443 ap->stats.idle_irq = 1;
4444#endif
4445
4446 memcpy(&ap->ioaddr, &ent->port[port_no], sizeof(struct ata_ioports));
4447}
4448
4449/**
4450 * ata_host_add - Attach low-level ATA driver to system
4451 * @ent: Information provided by low-level driver
4452 * @host_set: Collections of ports to which we add
4453 * @port_no: Port number associated with this host
4454 *
Jeff Garzik0cba6322005-05-30 19:49:12 -04004455 * Attach low-level ATA driver to system.
4456 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07004457 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04004458 * PCI/etc. bus probe sem.
Linus Torvalds1da177e2005-04-16 15:20:36 -07004459 *
4460 * RETURNS:
Jeff Garzik0cba6322005-05-30 19:49:12 -04004461 * New ata_port on success, for NULL on error.
Linus Torvalds1da177e2005-04-16 15:20:36 -07004462 */
4463
Jeff Garzik057ace52005-10-22 14:27:05 -04004464static struct ata_port * ata_host_add(const struct ata_probe_ent *ent,
Linus Torvalds1da177e2005-04-16 15:20:36 -07004465 struct ata_host_set *host_set,
4466 unsigned int port_no)
4467{
4468 struct Scsi_Host *host;
4469 struct ata_port *ap;
4470 int rc;
4471
4472 DPRINTK("ENTER\n");
4473 host = scsi_host_alloc(ent->sht, sizeof(struct ata_port));
4474 if (!host)
4475 return NULL;
4476
4477 ap = (struct ata_port *) &host->hostdata[0];
4478
4479 ata_host_init(ap, host, host_set, ent, port_no);
4480
4481 rc = ap->ops->port_start(ap);
4482 if (rc)
4483 goto err_out;
4484
4485 return ap;
4486
4487err_out:
4488 scsi_host_put(host);
4489 return NULL;
4490}
4491
4492/**
Jeff Garzik0cba6322005-05-30 19:49:12 -04004493 * ata_device_add - Register hardware device with ATA and SCSI layers
4494 * @ent: Probe information describing hardware device to be registered
4495 *
4496 * This function processes the information provided in the probe
4497 * information struct @ent, allocates the necessary ATA and SCSI
4498 * host information structures, initializes them, and registers
4499 * everything with requisite kernel subsystems.
4500 *
4501 * This function requests irqs, probes the ATA bus, and probes
4502 * the SCSI bus.
Linus Torvalds1da177e2005-04-16 15:20:36 -07004503 *
4504 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04004505 * PCI/etc. bus probe sem.
Linus Torvalds1da177e2005-04-16 15:20:36 -07004506 *
4507 * RETURNS:
Jeff Garzik0cba6322005-05-30 19:49:12 -04004508 * Number of ports registered. Zero on error (no ports registered).
Linus Torvalds1da177e2005-04-16 15:20:36 -07004509 */
4510
Jeff Garzik057ace52005-10-22 14:27:05 -04004511int ata_device_add(const struct ata_probe_ent *ent)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004512{
4513 unsigned int count = 0, i;
4514 struct device *dev = ent->dev;
4515 struct ata_host_set *host_set;
4516
4517 DPRINTK("ENTER\n");
4518 /* alloc a container for our list of ATA ports (buses) */
Randy Dunlap57f3bda2005-10-28 20:37:23 -07004519 host_set = kzalloc(sizeof(struct ata_host_set) +
Linus Torvalds1da177e2005-04-16 15:20:36 -07004520 (ent->n_ports * sizeof(void *)), GFP_KERNEL);
4521 if (!host_set)
4522 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004523 spin_lock_init(&host_set->lock);
4524
4525 host_set->dev = dev;
4526 host_set->n_ports = ent->n_ports;
4527 host_set->irq = ent->irq;
4528 host_set->mmio_base = ent->mmio_base;
4529 host_set->private_data = ent->private_data;
4530 host_set->ops = ent->port_ops;
4531
4532 /* register each port bound to this device */
4533 for (i = 0; i < ent->n_ports; i++) {
4534 struct ata_port *ap;
4535 unsigned long xfer_mode_mask;
4536
4537 ap = ata_host_add(ent, host_set, i);
4538 if (!ap)
4539 goto err_out;
4540
4541 host_set->ports[i] = ap;
4542 xfer_mode_mask =(ap->udma_mask << ATA_SHIFT_UDMA) |
4543 (ap->mwdma_mask << ATA_SHIFT_MWDMA) |
4544 (ap->pio_mask << ATA_SHIFT_PIO);
4545
4546 /* print per-port info to dmesg */
4547 printk(KERN_INFO "ata%u: %cATA max %s cmd 0x%lX ctl 0x%lX "
4548 "bmdma 0x%lX irq %lu\n",
4549 ap->id,
4550 ap->flags & ATA_FLAG_SATA ? 'S' : 'P',
4551 ata_mode_string(xfer_mode_mask),
4552 ap->ioaddr.cmd_addr,
4553 ap->ioaddr.ctl_addr,
4554 ap->ioaddr.bmdma_addr,
4555 ent->irq);
4556
4557 ata_chk_status(ap);
4558 host_set->ops->irq_clear(ap);
4559 count++;
4560 }
4561
Randy Dunlap57f3bda2005-10-28 20:37:23 -07004562 if (!count)
4563 goto err_free_ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004564
4565 /* obtain irq, that is shared between channels */
4566 if (request_irq(ent->irq, ent->port_ops->irq_handler, ent->irq_flags,
4567 DRV_NAME, host_set))
4568 goto err_out;
4569
4570 /* perform each probe synchronously */
4571 DPRINTK("probe begin\n");
4572 for (i = 0; i < count; i++) {
4573 struct ata_port *ap;
4574 int rc;
4575
4576 ap = host_set->ports[i];
4577
4578 DPRINTK("ata%u: probe begin\n", ap->id);
4579 rc = ata_bus_probe(ap);
4580 DPRINTK("ata%u: probe end\n", ap->id);
4581
4582 if (rc) {
4583 /* FIXME: do something useful here?
4584 * Current libata behavior will
4585 * tear down everything when
4586 * the module is removed
4587 * or the h/w is unplugged.
4588 */
4589 }
4590
4591 rc = scsi_add_host(ap->host, dev);
4592 if (rc) {
4593 printk(KERN_ERR "ata%u: scsi_add_host failed\n",
4594 ap->id);
4595 /* FIXME: do something useful here */
4596 /* FIXME: handle unconditional calls to
4597 * scsi_scan_host and ata_host_remove, below,
4598 * at the very least
4599 */
4600 }
4601 }
4602
4603 /* probes are done, now scan each port's disk(s) */
4604 DPRINTK("probe begin\n");
4605 for (i = 0; i < count; i++) {
4606 struct ata_port *ap = host_set->ports[i];
4607
Jeff Garzik644dd0c2005-10-03 15:55:19 -04004608 ata_scsi_scan_host(ap);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004609 }
4610
4611 dev_set_drvdata(dev, host_set);
4612
4613 VPRINTK("EXIT, returning %u\n", ent->n_ports);
4614 return ent->n_ports; /* success */
4615
4616err_out:
4617 for (i = 0; i < count; i++) {
4618 ata_host_remove(host_set->ports[i], 1);
4619 scsi_host_put(host_set->ports[i]->host);
4620 }
Randy Dunlap57f3bda2005-10-28 20:37:23 -07004621err_free_ret:
Linus Torvalds1da177e2005-04-16 15:20:36 -07004622 kfree(host_set);
4623 VPRINTK("EXIT, returning 0\n");
4624 return 0;
4625}
4626
4627/**
Alan Cox17b14452005-09-15 15:44:00 +01004628 * ata_host_set_remove - PCI layer callback for device removal
4629 * @host_set: ATA host set that was removed
4630 *
4631 * Unregister all objects associated with this host set. Free those
4632 * objects.
4633 *
4634 * LOCKING:
4635 * Inherited from calling layer (may sleep).
4636 */
4637
Alan Cox17b14452005-09-15 15:44:00 +01004638void ata_host_set_remove(struct ata_host_set *host_set)
4639{
4640 struct ata_port *ap;
4641 unsigned int i;
4642
4643 for (i = 0; i < host_set->n_ports; i++) {
4644 ap = host_set->ports[i];
4645 scsi_remove_host(ap->host);
4646 }
4647
4648 free_irq(host_set->irq, host_set);
4649
4650 for (i = 0; i < host_set->n_ports; i++) {
4651 ap = host_set->ports[i];
4652
4653 ata_scsi_release(ap->host);
4654
4655 if ((ap->flags & ATA_FLAG_NO_LEGACY) == 0) {
4656 struct ata_ioports *ioaddr = &ap->ioaddr;
4657
4658 if (ioaddr->cmd_addr == 0x1f0)
4659 release_region(0x1f0, 8);
4660 else if (ioaddr->cmd_addr == 0x170)
4661 release_region(0x170, 8);
4662 }
4663
4664 scsi_host_put(ap->host);
4665 }
4666
4667 if (host_set->ops->host_stop)
4668 host_set->ops->host_stop(host_set);
4669
4670 kfree(host_set);
4671}
4672
4673/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07004674 * ata_scsi_release - SCSI layer callback hook for host unload
4675 * @host: libata host to be unloaded
4676 *
4677 * Performs all duties necessary to shut down a libata port...
4678 * Kill port kthread, disable port, and release resources.
4679 *
4680 * LOCKING:
4681 * Inherited from SCSI layer.
4682 *
4683 * RETURNS:
4684 * One.
4685 */
4686
4687int ata_scsi_release(struct Scsi_Host *host)
4688{
4689 struct ata_port *ap = (struct ata_port *) &host->hostdata[0];
4690
4691 DPRINTK("ENTER\n");
4692
4693 ap->ops->port_disable(ap);
4694 ata_host_remove(ap, 0);
4695
4696 DPRINTK("EXIT\n");
4697 return 1;
4698}
4699
4700/**
4701 * ata_std_ports - initialize ioaddr with standard port offsets.
4702 * @ioaddr: IO address structure to be initialized
Edward Falk0baab862005-06-02 18:17:13 -04004703 *
4704 * Utility function which initializes data_addr, error_addr,
4705 * feature_addr, nsect_addr, lbal_addr, lbam_addr, lbah_addr,
4706 * device_addr, status_addr, and command_addr to standard offsets
4707 * relative to cmd_addr.
4708 *
4709 * Does not set ctl_addr, altstatus_addr, bmdma_addr, or scr_addr.
Linus Torvalds1da177e2005-04-16 15:20:36 -07004710 */
Edward Falk0baab862005-06-02 18:17:13 -04004711
Linus Torvalds1da177e2005-04-16 15:20:36 -07004712void ata_std_ports(struct ata_ioports *ioaddr)
4713{
4714 ioaddr->data_addr = ioaddr->cmd_addr + ATA_REG_DATA;
4715 ioaddr->error_addr = ioaddr->cmd_addr + ATA_REG_ERR;
4716 ioaddr->feature_addr = ioaddr->cmd_addr + ATA_REG_FEATURE;
4717 ioaddr->nsect_addr = ioaddr->cmd_addr + ATA_REG_NSECT;
4718 ioaddr->lbal_addr = ioaddr->cmd_addr + ATA_REG_LBAL;
4719 ioaddr->lbam_addr = ioaddr->cmd_addr + ATA_REG_LBAM;
4720 ioaddr->lbah_addr = ioaddr->cmd_addr + ATA_REG_LBAH;
4721 ioaddr->device_addr = ioaddr->cmd_addr + ATA_REG_DEVICE;
4722 ioaddr->status_addr = ioaddr->cmd_addr + ATA_REG_STATUS;
4723 ioaddr->command_addr = ioaddr->cmd_addr + ATA_REG_CMD;
4724}
4725
4726static struct ata_probe_ent *
Jeff Garzik057ace52005-10-22 14:27:05 -04004727ata_probe_ent_alloc(struct device *dev, const struct ata_port_info *port)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004728{
4729 struct ata_probe_ent *probe_ent;
4730
Randy Dunlap57f3bda2005-10-28 20:37:23 -07004731 probe_ent = kzalloc(sizeof(*probe_ent), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004732 if (!probe_ent) {
4733 printk(KERN_ERR DRV_NAME "(%s): out of memory\n",
4734 kobject_name(&(dev->kobj)));
4735 return NULL;
4736 }
4737
Linus Torvalds1da177e2005-04-16 15:20:36 -07004738 INIT_LIST_HEAD(&probe_ent->node);
4739 probe_ent->dev = dev;
4740
4741 probe_ent->sht = port->sht;
4742 probe_ent->host_flags = port->host_flags;
4743 probe_ent->pio_mask = port->pio_mask;
4744 probe_ent->mwdma_mask = port->mwdma_mask;
4745 probe_ent->udma_mask = port->udma_mask;
4746 probe_ent->port_ops = port->port_ops;
4747
4748 return probe_ent;
4749}
4750
Edward Falk0baab862005-06-02 18:17:13 -04004751
4752
Jeff Garzik374b1872005-08-30 05:42:52 -04004753#ifdef CONFIG_PCI
4754
4755void ata_pci_host_stop (struct ata_host_set *host_set)
4756{
4757 struct pci_dev *pdev = to_pci_dev(host_set->dev);
4758
4759 pci_iounmap(pdev, host_set->mmio_base);
4760}
4761
Edward Falk0baab862005-06-02 18:17:13 -04004762/**
4763 * ata_pci_init_native_mode - Initialize native-mode driver
4764 * @pdev: pci device to be initialized
4765 * @port: array[2] of pointers to port info structures.
Alan Cox47a86592005-10-04 08:09:19 -04004766 * @ports: bitmap of ports present
Edward Falk0baab862005-06-02 18:17:13 -04004767 *
4768 * Utility function which allocates and initializes an
4769 * ata_probe_ent structure for a standard dual-port
4770 * PIO-based IDE controller. The returned ata_probe_ent
4771 * structure can be passed to ata_device_add(). The returned
4772 * ata_probe_ent structure should then be freed with kfree().
Alan Cox47a86592005-10-04 08:09:19 -04004773 *
4774 * The caller need only pass the address of the primary port, the
4775 * secondary will be deduced automatically. If the device has non
4776 * standard secondary port mappings this function can be called twice,
4777 * once for each interface.
Edward Falk0baab862005-06-02 18:17:13 -04004778 */
4779
Linus Torvalds1da177e2005-04-16 15:20:36 -07004780struct ata_probe_ent *
Alan Cox47a86592005-10-04 08:09:19 -04004781ata_pci_init_native_mode(struct pci_dev *pdev, struct ata_port_info **port, int ports)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004782{
4783 struct ata_probe_ent *probe_ent =
4784 ata_probe_ent_alloc(pci_dev_to_dev(pdev), port[0]);
Alan Cox47a86592005-10-04 08:09:19 -04004785 int p = 0;
4786
Linus Torvalds1da177e2005-04-16 15:20:36 -07004787 if (!probe_ent)
4788 return NULL;
4789
Linus Torvalds1da177e2005-04-16 15:20:36 -07004790 probe_ent->irq = pdev->irq;
4791 probe_ent->irq_flags = SA_SHIRQ;
Alan Coxe99f8b52005-11-08 14:09:44 +00004792 probe_ent->private_data = port[0]->private_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004793
Alan Cox47a86592005-10-04 08:09:19 -04004794 if (ports & ATA_PORT_PRIMARY) {
4795 probe_ent->port[p].cmd_addr = pci_resource_start(pdev, 0);
4796 probe_ent->port[p].altstatus_addr =
4797 probe_ent->port[p].ctl_addr =
4798 pci_resource_start(pdev, 1) | ATA_PCI_CTL_OFS;
4799 probe_ent->port[p].bmdma_addr = pci_resource_start(pdev, 4);
4800 ata_std_ports(&probe_ent->port[p]);
4801 p++;
4802 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07004803
Alan Cox47a86592005-10-04 08:09:19 -04004804 if (ports & ATA_PORT_SECONDARY) {
4805 probe_ent->port[p].cmd_addr = pci_resource_start(pdev, 2);
4806 probe_ent->port[p].altstatus_addr =
4807 probe_ent->port[p].ctl_addr =
4808 pci_resource_start(pdev, 3) | ATA_PCI_CTL_OFS;
4809 probe_ent->port[p].bmdma_addr = pci_resource_start(pdev, 4) + 8;
4810 ata_std_ports(&probe_ent->port[p]);
4811 p++;
4812 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07004813
Alan Cox47a86592005-10-04 08:09:19 -04004814 probe_ent->n_ports = p;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004815 return probe_ent;
4816}
4817
Jeff Garzik0f0d5192005-10-30 06:41:29 -05004818static struct ata_probe_ent *ata_pci_init_legacy_port(struct pci_dev *pdev, struct ata_port_info *port, int port_num)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004819{
Alan Cox47a86592005-10-04 08:09:19 -04004820 struct ata_probe_ent *probe_ent;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004821
Jeff Garzik0f0d5192005-10-30 06:41:29 -05004822 probe_ent = ata_probe_ent_alloc(pci_dev_to_dev(pdev), port);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004823 if (!probe_ent)
4824 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004825
Linus Torvalds1da177e2005-04-16 15:20:36 -07004826 probe_ent->legacy_mode = 1;
Alan Cox47a86592005-10-04 08:09:19 -04004827 probe_ent->n_ports = 1;
4828 probe_ent->hard_port_no = port_num;
Alan Coxe99f8b52005-11-08 14:09:44 +00004829 probe_ent->private_data = port->private_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004830
Alan Cox47a86592005-10-04 08:09:19 -04004831 switch(port_num)
4832 {
4833 case 0:
4834 probe_ent->irq = 14;
4835 probe_ent->port[0].cmd_addr = 0x1f0;
4836 probe_ent->port[0].altstatus_addr =
4837 probe_ent->port[0].ctl_addr = 0x3f6;
4838 break;
4839 case 1:
4840 probe_ent->irq = 15;
4841 probe_ent->port[0].cmd_addr = 0x170;
4842 probe_ent->port[0].altstatus_addr =
4843 probe_ent->port[0].ctl_addr = 0x376;
4844 break;
4845 }
4846 probe_ent->port[0].bmdma_addr = pci_resource_start(pdev, 4) + 8 * port_num;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004847 ata_std_ports(&probe_ent->port[0]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004848 return probe_ent;
4849}
4850
4851/**
4852 * ata_pci_init_one - Initialize/register PCI IDE host controller
4853 * @pdev: Controller to be initialized
4854 * @port_info: Information from low-level host driver
4855 * @n_ports: Number of ports attached to host controller
4856 *
Edward Falk0baab862005-06-02 18:17:13 -04004857 * This is a helper function which can be called from a driver's
4858 * xxx_init_one() probe function if the hardware uses traditional
4859 * IDE taskfile registers.
4860 *
4861 * This function calls pci_enable_device(), reserves its register
4862 * regions, sets the dma mask, enables bus master mode, and calls
4863 * ata_device_add()
4864 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07004865 * LOCKING:
4866 * Inherited from PCI layer (may sleep).
4867 *
4868 * RETURNS:
Jeff Garzik0cba6322005-05-30 19:49:12 -04004869 * Zero on success, negative on errno-based value on error.
Linus Torvalds1da177e2005-04-16 15:20:36 -07004870 */
4871
4872int ata_pci_init_one (struct pci_dev *pdev, struct ata_port_info **port_info,
4873 unsigned int n_ports)
4874{
Alan Cox47a86592005-10-04 08:09:19 -04004875 struct ata_probe_ent *probe_ent = NULL, *probe_ent2 = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004876 struct ata_port_info *port[2];
4877 u8 tmp8, mask;
4878 unsigned int legacy_mode = 0;
4879 int disable_dev_on_err = 1;
4880 int rc;
4881
4882 DPRINTK("ENTER\n");
4883
4884 port[0] = port_info[0];
4885 if (n_ports > 1)
4886 port[1] = port_info[1];
4887 else
4888 port[1] = port[0];
4889
4890 if ((port[0]->host_flags & ATA_FLAG_NO_LEGACY) == 0
4891 && (pdev->class >> 8) == PCI_CLASS_STORAGE_IDE) {
Alan Cox47a86592005-10-04 08:09:19 -04004892 /* TODO: What if one channel is in native mode ... */
Linus Torvalds1da177e2005-04-16 15:20:36 -07004893 pci_read_config_byte(pdev, PCI_CLASS_PROG, &tmp8);
4894 mask = (1 << 2) | (1 << 0);
4895 if ((tmp8 & mask) != mask)
4896 legacy_mode = (1 << 3);
4897 }
4898
4899 /* FIXME... */
Alan Cox47a86592005-10-04 08:09:19 -04004900 if ((!legacy_mode) && (n_ports > 2)) {
4901 printk(KERN_ERR "ata: BUG: native mode, n_ports > 2\n");
4902 n_ports = 2;
4903 /* For now */
Linus Torvalds1da177e2005-04-16 15:20:36 -07004904 }
4905
Alan Cox47a86592005-10-04 08:09:19 -04004906 /* FIXME: Really for ATA it isn't safe because the device may be
4907 multi-purpose and we want to leave it alone if it was already
4908 enabled. Secondly for shared use as Arjan says we want refcounting
4909
4910 Checking dev->is_enabled is insufficient as this is not set at
4911 boot for the primary video which is BIOS enabled
4912 */
4913
Linus Torvalds1da177e2005-04-16 15:20:36 -07004914 rc = pci_enable_device(pdev);
4915 if (rc)
4916 return rc;
4917
4918 rc = pci_request_regions(pdev, DRV_NAME);
4919 if (rc) {
4920 disable_dev_on_err = 0;
4921 goto err_out;
4922 }
4923
Alan Cox47a86592005-10-04 08:09:19 -04004924 /* FIXME: Should use platform specific mappers for legacy port ranges */
Linus Torvalds1da177e2005-04-16 15:20:36 -07004925 if (legacy_mode) {
4926 if (!request_region(0x1f0, 8, "libata")) {
4927 struct resource *conflict, res;
4928 res.start = 0x1f0;
4929 res.end = 0x1f0 + 8 - 1;
4930 conflict = ____request_resource(&ioport_resource, &res);
4931 if (!strcmp(conflict->name, "libata"))
4932 legacy_mode |= (1 << 0);
4933 else {
4934 disable_dev_on_err = 0;
4935 printk(KERN_WARNING "ata: 0x1f0 IDE port busy\n");
4936 }
4937 } else
4938 legacy_mode |= (1 << 0);
4939
4940 if (!request_region(0x170, 8, "libata")) {
4941 struct resource *conflict, res;
4942 res.start = 0x170;
4943 res.end = 0x170 + 8 - 1;
4944 conflict = ____request_resource(&ioport_resource, &res);
4945 if (!strcmp(conflict->name, "libata"))
4946 legacy_mode |= (1 << 1);
4947 else {
4948 disable_dev_on_err = 0;
4949 printk(KERN_WARNING "ata: 0x170 IDE port busy\n");
4950 }
4951 } else
4952 legacy_mode |= (1 << 1);
4953 }
4954
4955 /* we have legacy mode, but all ports are unavailable */
4956 if (legacy_mode == (1 << 3)) {
4957 rc = -EBUSY;
4958 goto err_out_regions;
4959 }
4960
4961 rc = pci_set_dma_mask(pdev, ATA_DMA_MASK);
4962 if (rc)
4963 goto err_out_regions;
4964 rc = pci_set_consistent_dma_mask(pdev, ATA_DMA_MASK);
4965 if (rc)
4966 goto err_out_regions;
4967
4968 if (legacy_mode) {
Alan Cox47a86592005-10-04 08:09:19 -04004969 if (legacy_mode & (1 << 0))
Jeff Garzik0f0d5192005-10-30 06:41:29 -05004970 probe_ent = ata_pci_init_legacy_port(pdev, port[0], 0);
Alan Cox47a86592005-10-04 08:09:19 -04004971 if (legacy_mode & (1 << 1))
Jeff Garzik0f0d5192005-10-30 06:41:29 -05004972 probe_ent2 = ata_pci_init_legacy_port(pdev, port[1], 1);
Alan Cox47a86592005-10-04 08:09:19 -04004973 } else {
4974 if (n_ports == 2)
4975 probe_ent = ata_pci_init_native_mode(pdev, port, ATA_PORT_PRIMARY | ATA_PORT_SECONDARY);
4976 else
4977 probe_ent = ata_pci_init_native_mode(pdev, port, ATA_PORT_PRIMARY);
4978 }
4979 if (!probe_ent && !probe_ent2) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07004980 rc = -ENOMEM;
4981 goto err_out_regions;
4982 }
4983
4984 pci_set_master(pdev);
4985
4986 /* FIXME: check ata_device_add return */
4987 if (legacy_mode) {
4988 if (legacy_mode & (1 << 0))
4989 ata_device_add(probe_ent);
4990 if (legacy_mode & (1 << 1))
4991 ata_device_add(probe_ent2);
4992 } else
4993 ata_device_add(probe_ent);
4994
4995 kfree(probe_ent);
4996 kfree(probe_ent2);
4997
4998 return 0;
4999
5000err_out_regions:
5001 if (legacy_mode & (1 << 0))
5002 release_region(0x1f0, 8);
5003 if (legacy_mode & (1 << 1))
5004 release_region(0x170, 8);
5005 pci_release_regions(pdev);
5006err_out:
5007 if (disable_dev_on_err)
5008 pci_disable_device(pdev);
5009 return rc;
5010}
5011
5012/**
5013 * ata_pci_remove_one - PCI layer callback for device removal
5014 * @pdev: PCI device that was removed
5015 *
5016 * PCI layer indicates to libata via this hook that
Randy Dunlap6f0ef4f2005-10-25 01:44:30 -04005017 * hot-unplug or module unload event has occurred.
Linus Torvalds1da177e2005-04-16 15:20:36 -07005018 * Handle this by unregistering all objects associated
5019 * with this PCI device. Free those objects. Then finally
5020 * release PCI resources and disable device.
5021 *
5022 * LOCKING:
5023 * Inherited from PCI layer (may sleep).
5024 */
5025
5026void ata_pci_remove_one (struct pci_dev *pdev)
5027{
5028 struct device *dev = pci_dev_to_dev(pdev);
5029 struct ata_host_set *host_set = dev_get_drvdata(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005030
Alan Cox17b14452005-09-15 15:44:00 +01005031 ata_host_set_remove(host_set);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005032 pci_release_regions(pdev);
5033 pci_disable_device(pdev);
5034 dev_set_drvdata(dev, NULL);
5035}
5036
5037/* move to PCI subsystem */
Jeff Garzik057ace52005-10-22 14:27:05 -04005038int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005039{
5040 unsigned long tmp = 0;
5041
5042 switch (bits->width) {
5043 case 1: {
5044 u8 tmp8 = 0;
5045 pci_read_config_byte(pdev, bits->reg, &tmp8);
5046 tmp = tmp8;
5047 break;
5048 }
5049 case 2: {
5050 u16 tmp16 = 0;
5051 pci_read_config_word(pdev, bits->reg, &tmp16);
5052 tmp = tmp16;
5053 break;
5054 }
5055 case 4: {
5056 u32 tmp32 = 0;
5057 pci_read_config_dword(pdev, bits->reg, &tmp32);
5058 tmp = tmp32;
5059 break;
5060 }
5061
5062 default:
5063 return -EINVAL;
5064 }
5065
5066 tmp &= bits->mask;
5067
5068 return (tmp == bits->val) ? 1 : 0;
5069}
Jens Axboe9b847542006-01-06 09:28:07 +01005070
5071int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t state)
5072{
5073 pci_save_state(pdev);
5074 pci_disable_device(pdev);
5075 pci_set_power_state(pdev, PCI_D3hot);
5076 return 0;
5077}
5078
5079int ata_pci_device_resume(struct pci_dev *pdev)
5080{
5081 pci_set_power_state(pdev, PCI_D0);
5082 pci_restore_state(pdev);
5083 pci_enable_device(pdev);
5084 pci_set_master(pdev);
5085 return 0;
5086}
Linus Torvalds1da177e2005-04-16 15:20:36 -07005087#endif /* CONFIG_PCI */
5088
5089
Linus Torvalds1da177e2005-04-16 15:20:36 -07005090static int __init ata_init(void)
5091{
5092 ata_wq = create_workqueue("ata");
5093 if (!ata_wq)
5094 return -ENOMEM;
5095
5096 printk(KERN_DEBUG "libata version " DRV_VERSION " loaded.\n");
5097 return 0;
5098}
5099
5100static void __exit ata_exit(void)
5101{
5102 destroy_workqueue(ata_wq);
5103}
5104
5105module_init(ata_init);
5106module_exit(ata_exit);
5107
Jeff Garzik67846b32005-10-05 02:58:32 -04005108static unsigned long ratelimit_time;
5109static spinlock_t ata_ratelimit_lock = SPIN_LOCK_UNLOCKED;
5110
5111int ata_ratelimit(void)
5112{
5113 int rc;
5114 unsigned long flags;
5115
5116 spin_lock_irqsave(&ata_ratelimit_lock, flags);
5117
5118 if (time_after(jiffies, ratelimit_time)) {
5119 rc = 1;
5120 ratelimit_time = jiffies + (HZ/5);
5121 } else
5122 rc = 0;
5123
5124 spin_unlock_irqrestore(&ata_ratelimit_lock, flags);
5125
5126 return rc;
5127}
5128
Linus Torvalds1da177e2005-04-16 15:20:36 -07005129/*
5130 * libata is essentially a library of internal helper functions for
5131 * low-level ATA host controller drivers. As such, the API/ABI is
5132 * likely to change as new drivers are added and updated.
5133 * Do not depend on ABI/API stability.
5134 */
5135
5136EXPORT_SYMBOL_GPL(ata_std_bios_param);
5137EXPORT_SYMBOL_GPL(ata_std_ports);
5138EXPORT_SYMBOL_GPL(ata_device_add);
Alan Cox17b14452005-09-15 15:44:00 +01005139EXPORT_SYMBOL_GPL(ata_host_set_remove);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005140EXPORT_SYMBOL_GPL(ata_sg_init);
5141EXPORT_SYMBOL_GPL(ata_sg_init_one);
5142EXPORT_SYMBOL_GPL(ata_qc_complete);
5143EXPORT_SYMBOL_GPL(ata_qc_issue_prot);
5144EXPORT_SYMBOL_GPL(ata_eng_timeout);
5145EXPORT_SYMBOL_GPL(ata_tf_load);
5146EXPORT_SYMBOL_GPL(ata_tf_read);
5147EXPORT_SYMBOL_GPL(ata_noop_dev_select);
5148EXPORT_SYMBOL_GPL(ata_std_dev_select);
5149EXPORT_SYMBOL_GPL(ata_tf_to_fis);
5150EXPORT_SYMBOL_GPL(ata_tf_from_fis);
5151EXPORT_SYMBOL_GPL(ata_check_status);
5152EXPORT_SYMBOL_GPL(ata_altstatus);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005153EXPORT_SYMBOL_GPL(ata_exec_command);
5154EXPORT_SYMBOL_GPL(ata_port_start);
5155EXPORT_SYMBOL_GPL(ata_port_stop);
Jeff Garzikaa8f0dc2005-05-26 21:54:27 -04005156EXPORT_SYMBOL_GPL(ata_host_stop);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005157EXPORT_SYMBOL_GPL(ata_interrupt);
5158EXPORT_SYMBOL_GPL(ata_qc_prep);
5159EXPORT_SYMBOL_GPL(ata_bmdma_setup);
5160EXPORT_SYMBOL_GPL(ata_bmdma_start);
5161EXPORT_SYMBOL_GPL(ata_bmdma_irq_clear);
5162EXPORT_SYMBOL_GPL(ata_bmdma_status);
5163EXPORT_SYMBOL_GPL(ata_bmdma_stop);
5164EXPORT_SYMBOL_GPL(ata_port_probe);
5165EXPORT_SYMBOL_GPL(sata_phy_reset);
5166EXPORT_SYMBOL_GPL(__sata_phy_reset);
5167EXPORT_SYMBOL_GPL(ata_bus_reset);
5168EXPORT_SYMBOL_GPL(ata_port_disable);
Jeff Garzik67846b32005-10-05 02:58:32 -04005169EXPORT_SYMBOL_GPL(ata_ratelimit);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005170EXPORT_SYMBOL_GPL(ata_scsi_ioctl);
5171EXPORT_SYMBOL_GPL(ata_scsi_queuecmd);
5172EXPORT_SYMBOL_GPL(ata_scsi_error);
5173EXPORT_SYMBOL_GPL(ata_scsi_slave_config);
5174EXPORT_SYMBOL_GPL(ata_scsi_release);
5175EXPORT_SYMBOL_GPL(ata_host_intr);
5176EXPORT_SYMBOL_GPL(ata_dev_classify);
5177EXPORT_SYMBOL_GPL(ata_dev_id_string);
Brad Campbell6f2f3812005-05-12 15:07:47 -04005178EXPORT_SYMBOL_GPL(ata_dev_config);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005179EXPORT_SYMBOL_GPL(ata_scsi_simulate);
Tejun Heoa72ec4c2006-01-23 13:09:37 +09005180EXPORT_SYMBOL_GPL(ata_eh_qc_complete);
5181EXPORT_SYMBOL_GPL(ata_eh_qc_retry);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005182
Alan Cox1bc4ccf2006-01-09 17:18:14 +00005183EXPORT_SYMBOL_GPL(ata_pio_need_iordy);
Alan Cox452503f2005-10-21 19:01:32 -04005184EXPORT_SYMBOL_GPL(ata_timing_compute);
5185EXPORT_SYMBOL_GPL(ata_timing_merge);
5186
Linus Torvalds1da177e2005-04-16 15:20:36 -07005187#ifdef CONFIG_PCI
5188EXPORT_SYMBOL_GPL(pci_test_config_bits);
Jeff Garzik374b1872005-08-30 05:42:52 -04005189EXPORT_SYMBOL_GPL(ata_pci_host_stop);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005190EXPORT_SYMBOL_GPL(ata_pci_init_native_mode);
5191EXPORT_SYMBOL_GPL(ata_pci_init_one);
5192EXPORT_SYMBOL_GPL(ata_pci_remove_one);
Jens Axboe9b847542006-01-06 09:28:07 +01005193EXPORT_SYMBOL_GPL(ata_pci_device_suspend);
5194EXPORT_SYMBOL_GPL(ata_pci_device_resume);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005195#endif /* CONFIG_PCI */
Jens Axboe9b847542006-01-06 09:28:07 +01005196
5197EXPORT_SYMBOL_GPL(ata_device_suspend);
5198EXPORT_SYMBOL_GPL(ata_device_resume);
5199EXPORT_SYMBOL_GPL(ata_scsi_device_suspend);
5200EXPORT_SYMBOL_GPL(ata_scsi_device_resume);