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Commit | Line | Data |
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1da177e4 | 1 | /* |
59bca8cc BZ |
2 | * Copyright (C) 1994-1998 Linus Torvalds & authors (see below) |
3 | * Copyrifht (C) 2003-2005, 2007 Bartlomiej Zolnierkiewicz | |
1da177e4 LT |
4 | */ |
5 | ||
6 | /* | |
7 | * Mostly written by Mark Lord <mlord@pobox.com> | |
8 | * and Gadi Oxman <gadio@netvision.net.il> | |
9 | * and Andre Hedrick <andre@linux-ide.org> | |
10 | * | |
11 | * See linux/MAINTAINERS for address of current maintainer. | |
12 | * | |
13 | * This is the multiple IDE interface driver, as evolved from hd.c. | |
14 | * It supports up to MAX_HWIFS IDE interfaces, on one or more IRQs | |
15 | * (usually 14 & 15). | |
16 | * There can be up to two drives per interface, as per the ATA-2 spec. | |
17 | * | |
1da177e4 LT |
18 | * ... |
19 | * | |
20 | * From hd.c: | |
21 | * | | |
22 | * | It traverses the request-list, using interrupts to jump between functions. | |
23 | * | As nearly all functions can be called within interrupts, we may not sleep. | |
24 | * | Special care is recommended. Have Fun! | |
25 | * | | |
26 | * | modified by Drew Eckhardt to check nr of hd's from the CMOS. | |
27 | * | | |
28 | * | Thanks to Branko Lankester, lankeste@fwi.uva.nl, who found a bug | |
29 | * | in the early extended-partition checks and added DM partitions. | |
30 | * | | |
31 | * | Early work on error handling by Mika Liljeberg (liljeber@cs.Helsinki.FI). | |
32 | * | | |
33 | * | IRQ-unmask, drive-id, multiple-mode, support for ">16 heads", | |
34 | * | and general streamlining by Mark Lord (mlord@pobox.com). | |
35 | * | |
36 | * October, 1994 -- Complete line-by-line overhaul for linux 1.1.x, by: | |
37 | * | |
38 | * Mark Lord (mlord@pobox.com) (IDE Perf.Pkg) | |
39 | * Delman Lee (delman@ieee.org) ("Mr. atdisk2") | |
40 | * Scott Snyder (snyder@fnald0.fnal.gov) (ATAPI IDE cd-rom) | |
41 | * | |
42 | * This was a rewrite of just about everything from hd.c, though some original | |
43 | * code is still sprinkled about. Think of it as a major evolution, with | |
44 | * inspiration from lots of linux users, esp. hamish@zot.apana.org.au | |
1da177e4 LT |
45 | */ |
46 | ||
1da177e4 LT |
47 | #define _IDE_C /* Tell ide.h it's really us */ |
48 | ||
1da177e4 LT |
49 | #include <linux/module.h> |
50 | #include <linux/types.h> | |
51 | #include <linux/string.h> | |
52 | #include <linux/kernel.h> | |
53 | #include <linux/timer.h> | |
54 | #include <linux/mm.h> | |
55 | #include <linux/interrupt.h> | |
56 | #include <linux/major.h> | |
57 | #include <linux/errno.h> | |
58 | #include <linux/genhd.h> | |
59 | #include <linux/blkpg.h> | |
60 | #include <linux/slab.h> | |
61 | #include <linux/init.h> | |
62 | #include <linux/pci.h> | |
63 | #include <linux/delay.h> | |
64 | #include <linux/ide.h> | |
1da177e4 LT |
65 | #include <linux/completion.h> |
66 | #include <linux/reboot.h> | |
67 | #include <linux/cdrom.h> | |
68 | #include <linux/seq_file.h> | |
69 | #include <linux/device.h> | |
70 | #include <linux/bitops.h> | |
71 | ||
72 | #include <asm/byteorder.h> | |
73 | #include <asm/irq.h> | |
74 | #include <asm/uaccess.h> | |
75 | #include <asm/io.h> | |
76 | ||
77 | ||
78 | /* default maximum number of failures */ | |
79 | #define IDE_DEFAULT_MAX_FAILURES 1 | |
80 | ||
f74c9141 BZ |
81 | struct class *ide_port_class; |
82 | ||
1da177e4 LT |
83 | static const u8 ide_hwif_to_major[] = { IDE0_MAJOR, IDE1_MAJOR, |
84 | IDE2_MAJOR, IDE3_MAJOR, | |
85 | IDE4_MAJOR, IDE5_MAJOR, | |
86 | IDE6_MAJOR, IDE7_MAJOR, | |
87 | IDE8_MAJOR, IDE9_MAJOR }; | |
88 | ||
ef29888e | 89 | DEFINE_MUTEX(ide_cfg_mtx); |
1da177e4 | 90 | |
931ee0dc BZ |
91 | __cacheline_aligned_in_smp DEFINE_SPINLOCK(ide_lock); |
92 | EXPORT_SYMBOL(ide_lock); | |
1da177e4 | 93 | |
43514ed1 BZ |
94 | static void ide_port_init_devices_data(ide_hwif_t *); |
95 | ||
1da177e4 LT |
96 | /* |
97 | * Do not even *think* about calling this! | |
98 | */ | |
cbb010c1 | 99 | void ide_init_port_data(ide_hwif_t *hwif, unsigned int index) |
1da177e4 | 100 | { |
1da177e4 LT |
101 | /* bulk initialize hwif & drive info with zeros */ |
102 | memset(hwif, 0, sizeof(ide_hwif_t)); | |
103 | ||
104 | /* fill in any non-zero initial values */ | |
105 | hwif->index = index; | |
106 | hwif->major = ide_hwif_to_major[index]; | |
107 | ||
108 | hwif->name[0] = 'i'; | |
109 | hwif->name[1] = 'd'; | |
110 | hwif->name[2] = 'e'; | |
111 | hwif->name[3] = '0' + index; | |
112 | ||
113 | hwif->bus_state = BUSSTATE_ON; | |
114 | ||
f36d4024 | 115 | init_completion(&hwif->gendev_rel_comp); |
1da177e4 LT |
116 | |
117 | default_hwif_iops(hwif); | |
118 | default_hwif_transport(hwif); | |
43514ed1 BZ |
119 | |
120 | ide_port_init_devices_data(hwif); | |
121 | } | |
43514ed1 BZ |
122 | |
123 | static void ide_port_init_devices_data(ide_hwif_t *hwif) | |
124 | { | |
125 | int unit; | |
126 | ||
1da177e4 LT |
127 | for (unit = 0; unit < MAX_DRIVES; ++unit) { |
128 | ide_drive_t *drive = &hwif->drives[unit]; | |
43514ed1 BZ |
129 | u8 j = (hwif->index * MAX_DRIVES) + unit; |
130 | ||
131 | memset(drive, 0, sizeof(*drive)); | |
1da177e4 LT |
132 | |
133 | drive->media = ide_disk; | |
134 | drive->select.all = (unit<<4)|0xa0; | |
135 | drive->hwif = hwif; | |
1da177e4 LT |
136 | drive->ready_stat = READY_STAT; |
137 | drive->bad_wstat = BAD_W_STAT; | |
138 | drive->special.b.recalibrate = 1; | |
139 | drive->special.b.set_geometry = 1; | |
140 | drive->name[0] = 'h'; | |
141 | drive->name[1] = 'd'; | |
43514ed1 | 142 | drive->name[2] = 'a' + j; |
1da177e4 | 143 | drive->max_failures = IDE_DEFAULT_MAX_FAILURES; |
43514ed1 | 144 | |
1da177e4 | 145 | INIT_LIST_HEAD(&drive->list); |
f36d4024 | 146 | init_completion(&drive->gendev_rel_comp); |
1da177e4 LT |
147 | } |
148 | } | |
43514ed1 | 149 | |
fbd13088 | 150 | void ide_remove_port_from_hwgroup(ide_hwif_t *hwif) |
96e5ad30 BZ |
151 | { |
152 | ide_hwgroup_t *hwgroup = hwif->hwgroup; | |
153 | ||
154 | spin_lock_irq(&ide_lock); | |
155 | /* | |
156 | * Remove us from the hwgroup, and free | |
157 | * the hwgroup if we were the only member | |
158 | */ | |
159 | if (hwif->next == hwif) { | |
160 | BUG_ON(hwgroup->hwif != hwif); | |
161 | kfree(hwgroup); | |
162 | } else { | |
163 | /* There is another interface in hwgroup. | |
164 | * Unlink us, and set hwgroup->drive and ->hwif to | |
165 | * something sane. | |
166 | */ | |
167 | ide_hwif_t *g = hwgroup->hwif; | |
168 | ||
169 | while (g->next != hwif) | |
170 | g = g->next; | |
171 | g->next = hwif->next; | |
172 | if (hwgroup->hwif == hwif) { | |
173 | /* Chose a random hwif for hwgroup->hwif. | |
174 | * It's guaranteed that there are no drives | |
175 | * left in the hwgroup. | |
176 | */ | |
177 | BUG_ON(hwgroup->drive != NULL); | |
178 | hwgroup->hwif = g; | |
179 | } | |
180 | BUG_ON(hwgroup->hwif == hwif); | |
181 | } | |
182 | spin_unlock_irq(&ide_lock); | |
183 | } | |
184 | ||
71bf9f6f | 185 | /* Called with ide_lock held. */ |
2dde7861 | 186 | static void __ide_port_unregister_devices(ide_hwif_t *hwif) |
71bf9f6f BZ |
187 | { |
188 | int i; | |
189 | ||
190 | for (i = 0; i < MAX_DRIVES; i++) { | |
191 | ide_drive_t *drive = &hwif->drives[i]; | |
192 | ||
193 | if (drive->present) { | |
194 | spin_unlock_irq(&ide_lock); | |
195 | device_unregister(&drive->gendev); | |
196 | wait_for_completion(&drive->gendev_rel_comp); | |
197 | spin_lock_irq(&ide_lock); | |
198 | } | |
199 | } | |
200 | } | |
201 | ||
2dde7861 BZ |
202 | void ide_port_unregister_devices(ide_hwif_t *hwif) |
203 | { | |
204 | mutex_lock(&ide_cfg_mtx); | |
205 | spin_lock_irq(&ide_lock); | |
206 | __ide_port_unregister_devices(hwif); | |
207 | hwif->present = 0; | |
208 | ide_port_init_devices_data(hwif); | |
209 | spin_unlock_irq(&ide_lock); | |
210 | mutex_unlock(&ide_cfg_mtx); | |
211 | } | |
212 | EXPORT_SYMBOL_GPL(ide_port_unregister_devices); | |
213 | ||
1da177e4 | 214 | /** |
020e322d | 215 | * ide_unregister - free an IDE interface |
387750c3 | 216 | * @hwif: IDE interface |
1da177e4 LT |
217 | * |
218 | * Perform the final unregister of an IDE interface. At the moment | |
219 | * we don't refcount interfaces so this will also get split up. | |
220 | * | |
221 | * Locking: | |
222 | * The caller must not hold the IDE locks | |
223 | * The drive present/vanishing is not yet properly locked | |
224 | * Take care with the callbacks. These have been split to avoid | |
225 | * deadlocking the IDE layer. The shutdown callback is called | |
226 | * before we take the lock and free resources. It is up to the | |
227 | * caller to be sure there is no pending I/O here, and that | |
020e322d SS |
228 | * the interface will not be reopened (present/vanishing locking |
229 | * isn't yet done BTW). After we commit to the final kill we | |
1da177e4 LT |
230 | * call the cleanup callback with the ide locks held. |
231 | * | |
232 | * Unregister restores the hwif structures to the default state. | |
233 | * This is raving bonkers. | |
234 | */ | |
235 | ||
387750c3 | 236 | void ide_unregister(ide_hwif_t *hwif) |
1da177e4 | 237 | { |
387750c3 | 238 | ide_hwif_t *g; |
1da177e4 | 239 | ide_hwgroup_t *hwgroup; |
71bf9f6f | 240 | int irq_count = 0; |
1da177e4 | 241 | |
1da177e4 LT |
242 | BUG_ON(in_interrupt()); |
243 | BUG_ON(irqs_disabled()); | |
bd8a59e2 | 244 | |
ef29888e | 245 | mutex_lock(&ide_cfg_mtx); |
1da177e4 | 246 | |
bd8a59e2 BZ |
247 | spin_lock_irq(&ide_lock); |
248 | if (hwif->present) { | |
249 | __ide_port_unregister_devices(hwif); | |
250 | hwif->present = 0; | |
251 | } | |
1da177e4 LT |
252 | spin_unlock_irq(&ide_lock); |
253 | ||
5cbf79cd | 254 | ide_proc_unregister_port(hwif); |
1da177e4 LT |
255 | |
256 | hwgroup = hwif->hwgroup; | |
257 | /* | |
258 | * free the irq if we were the only hwif using it | |
259 | */ | |
260 | g = hwgroup->hwif; | |
261 | do { | |
262 | if (g->irq == hwif->irq) | |
263 | ++irq_count; | |
264 | g = g->next; | |
265 | } while (g != hwgroup->hwif); | |
266 | if (irq_count == 1) | |
267 | free_irq(hwif->irq, hwgroup); | |
268 | ||
96e5ad30 | 269 | ide_remove_port_from_hwgroup(hwif); |
1da177e4 | 270 | |
f74c9141 | 271 | device_unregister(hwif->portdev); |
1da177e4 | 272 | device_unregister(&hwif->gendev); |
f36d4024 | 273 | wait_for_completion(&hwif->gendev_rel_comp); |
1da177e4 LT |
274 | |
275 | /* | |
276 | * Remove us from the kernel's knowledge | |
277 | */ | |
278 | blk_unregister_region(MKDEV(hwif->major, 0), MAX_DRIVES<<PARTN_BITS); | |
279 | kfree(hwif->sg_table); | |
280 | unregister_blkdev(hwif->major, hwif->name); | |
1da177e4 | 281 | |
93de00fd | 282 | if (hwif->dma_base) |
0d1bad21 | 283 | ide_release_dma_engine(hwif); |
1da177e4 | 284 | |
2b54ed94 | 285 | spin_lock_irq(&ide_lock); |
1da177e4 | 286 | /* restore hwif data to pristine status */ |
387750c3 | 287 | ide_init_port_data(hwif, hwif->index); |
1da177e4 | 288 | spin_unlock_irq(&ide_lock); |
2b54ed94 | 289 | |
ef29888e | 290 | mutex_unlock(&ide_cfg_mtx); |
1da177e4 LT |
291 | } |
292 | ||
293 | EXPORT_SYMBOL(ide_unregister); | |
294 | ||
57c802e8 BZ |
295 | void ide_init_port_hw(ide_hwif_t *hwif, hw_regs_t *hw) |
296 | { | |
4c3032d8 | 297 | memcpy(&hwif->io_ports, &hw->io_ports, sizeof(hwif->io_ports)); |
57c802e8 | 298 | hwif->irq = hw->irq; |
57c802e8 BZ |
299 | hwif->chipset = hw->chipset; |
300 | hwif->gendev.parent = hw->dev; | |
301 | hwif->ack_intr = hw->ack_intr; | |
302 | } | |
303 | EXPORT_SYMBOL_GPL(ide_init_port_hw); | |
304 | ||
1da177e4 LT |
305 | /* |
306 | * Locks for IDE setting functionality | |
307 | */ | |
308 | ||
f9383c42 | 309 | DEFINE_MUTEX(ide_setting_mtx); |
1da177e4 | 310 | |
f9383c42 | 311 | EXPORT_SYMBOL_GPL(ide_setting_mtx); |
1497943e | 312 | |
1da177e4 LT |
313 | /** |
314 | * ide_spin_wait_hwgroup - wait for group | |
315 | * @drive: drive in the group | |
316 | * | |
317 | * Wait for an IDE device group to go non busy and then return | |
318 | * holding the ide_lock which guards the hwgroup->busy status | |
319 | * and right to use it. | |
320 | */ | |
321 | ||
322 | int ide_spin_wait_hwgroup (ide_drive_t *drive) | |
323 | { | |
324 | ide_hwgroup_t *hwgroup = HWGROUP(drive); | |
325 | unsigned long timeout = jiffies + (3 * HZ); | |
326 | ||
327 | spin_lock_irq(&ide_lock); | |
328 | ||
329 | while (hwgroup->busy) { | |
330 | unsigned long lflags; | |
331 | spin_unlock_irq(&ide_lock); | |
332 | local_irq_set(lflags); | |
333 | if (time_after(jiffies, timeout)) { | |
334 | local_irq_restore(lflags); | |
335 | printk(KERN_ERR "%s: channel busy\n", drive->name); | |
336 | return -EBUSY; | |
337 | } | |
338 | local_irq_restore(lflags); | |
339 | spin_lock_irq(&ide_lock); | |
340 | } | |
341 | return 0; | |
342 | } | |
343 | ||
344 | EXPORT_SYMBOL(ide_spin_wait_hwgroup); | |
345 | ||
7662d046 | 346 | int set_io_32bit(ide_drive_t *drive, int arg) |
1da177e4 | 347 | { |
1497943e BZ |
348 | if (drive->no_io_32bit) |
349 | return -EPERM; | |
350 | ||
351 | if (arg < 0 || arg > 1 + (SUPPORT_VLB_SYNC << 1)) | |
352 | return -EINVAL; | |
353 | ||
644a9d76 BZ |
354 | if (ide_spin_wait_hwgroup(drive)) |
355 | return -EBUSY; | |
356 | ||
1da177e4 | 357 | drive->io_32bit = arg; |
644a9d76 BZ |
358 | |
359 | spin_unlock_irq(&ide_lock); | |
360 | ||
1da177e4 LT |
361 | return 0; |
362 | } | |
363 | ||
1497943e BZ |
364 | static int set_ksettings(ide_drive_t *drive, int arg) |
365 | { | |
366 | if (arg < 0 || arg > 1) | |
367 | return -EINVAL; | |
368 | ||
369 | if (ide_spin_wait_hwgroup(drive)) | |
370 | return -EBUSY; | |
371 | drive->keep_settings = arg; | |
372 | spin_unlock_irq(&ide_lock); | |
373 | ||
374 | return 0; | |
375 | } | |
376 | ||
7662d046 | 377 | int set_using_dma(ide_drive_t *drive, int arg) |
1da177e4 LT |
378 | { |
379 | #ifdef CONFIG_BLK_DEV_IDEDMA | |
87996204 BZ |
380 | ide_hwif_t *hwif = drive->hwif; |
381 | int err = -EPERM; | |
382 | ||
1497943e BZ |
383 | if (arg < 0 || arg > 1) |
384 | return -EINVAL; | |
385 | ||
1da177e4 | 386 | if (!drive->id || !(drive->id->capability & 1)) |
87996204 BZ |
387 | goto out; |
388 | ||
5e37bdc0 | 389 | if (hwif->dma_ops == NULL) |
87996204 BZ |
390 | goto out; |
391 | ||
392 | err = -EBUSY; | |
393 | if (ide_spin_wait_hwgroup(drive)) | |
394 | goto out; | |
395 | /* | |
396 | * set ->busy flag, unlock and let it ride | |
397 | */ | |
398 | hwif->hwgroup->busy = 1; | |
399 | spin_unlock_irq(&ide_lock); | |
400 | ||
401 | err = 0; | |
402 | ||
1da177e4 | 403 | if (arg) { |
23b1bd45 | 404 | if (ide_set_dma(drive)) |
87996204 | 405 | err = -EIO; |
7469aaf6 BZ |
406 | } else |
407 | ide_dma_off(drive); | |
87996204 BZ |
408 | |
409 | /* | |
410 | * lock, clear ->busy flag and unlock before leaving | |
411 | */ | |
412 | spin_lock_irq(&ide_lock); | |
413 | hwif->hwgroup->busy = 0; | |
414 | spin_unlock_irq(&ide_lock); | |
415 | out: | |
416 | return err; | |
1da177e4 | 417 | #else |
1497943e BZ |
418 | if (arg < 0 || arg > 1) |
419 | return -EINVAL; | |
420 | ||
1da177e4 LT |
421 | return -EPERM; |
422 | #endif | |
423 | } | |
424 | ||
7662d046 | 425 | int set_pio_mode(ide_drive_t *drive, int arg) |
1da177e4 | 426 | { |
5b114715 | 427 | struct request *rq; |
784506cb | 428 | ide_hwif_t *hwif = drive->hwif; |
ac95beed | 429 | const struct ide_port_ops *port_ops = hwif->port_ops; |
1da177e4 | 430 | |
1497943e BZ |
431 | if (arg < 0 || arg > 255) |
432 | return -EINVAL; | |
433 | ||
ac95beed | 434 | if (port_ops == NULL || port_ops->set_pio_mode == NULL || |
784506cb | 435 | (hwif->host_flags & IDE_HFLAG_NO_SET_MODE)) |
1da177e4 | 436 | return -ENOSYS; |
26bcb879 | 437 | |
1da177e4 LT |
438 | if (drive->special.b.set_tune) |
439 | return -EBUSY; | |
145b75e9 | 440 | |
5b114715 FT |
441 | rq = blk_get_request(drive->queue, READ, __GFP_WAIT); |
442 | rq->cmd_type = REQ_TYPE_ATA_TASKFILE; | |
145b75e9 | 443 | |
1da177e4 LT |
444 | drive->tune_req = (u8) arg; |
445 | drive->special.b.set_tune = 1; | |
5b114715 FT |
446 | |
447 | blk_execute_rq(drive->queue, NULL, rq, 0); | |
448 | blk_put_request(rq); | |
449 | ||
1da177e4 LT |
450 | return 0; |
451 | } | |
452 | ||
1497943e BZ |
453 | static int set_unmaskirq(ide_drive_t *drive, int arg) |
454 | { | |
455 | if (drive->no_unmask) | |
456 | return -EPERM; | |
457 | ||
458 | if (arg < 0 || arg > 1) | |
459 | return -EINVAL; | |
460 | ||
461 | if (ide_spin_wait_hwgroup(drive)) | |
462 | return -EBUSY; | |
463 | drive->unmask = arg; | |
464 | spin_unlock_irq(&ide_lock); | |
465 | ||
466 | return 0; | |
467 | } | |
468 | ||
b887d2e6 | 469 | static int generic_ide_suspend(struct device *dev, pm_message_t mesg) |
1da177e4 LT |
470 | { |
471 | ide_drive_t *drive = dev->driver_data; | |
e3a59b4d | 472 | ide_hwif_t *hwif = HWIF(drive); |
5b114715 | 473 | struct request *rq; |
1da177e4 LT |
474 | struct request_pm_state rqpm; |
475 | ide_task_t args; | |
5e32132b | 476 | int ret; |
1da177e4 | 477 | |
e3a59b4d HR |
478 | /* Call ACPI _GTM only once */ |
479 | if (!(drive->dn % 2)) | |
480 | ide_acpi_get_timing(hwif); | |
481 | ||
1da177e4 LT |
482 | memset(&rqpm, 0, sizeof(rqpm)); |
483 | memset(&args, 0, sizeof(args)); | |
5b114715 FT |
484 | rq = blk_get_request(drive->queue, READ, __GFP_WAIT); |
485 | rq->cmd_type = REQ_TYPE_PM_SUSPEND; | |
486 | rq->special = &args; | |
487 | rq->data = &rqpm; | |
1da177e4 | 488 | rqpm.pm_step = ide_pm_state_start_suspend; |
b887d2e6 DB |
489 | if (mesg.event == PM_EVENT_PRETHAW) |
490 | mesg.event = PM_EVENT_FREEZE; | |
491 | rqpm.pm_state = mesg.event; | |
1da177e4 | 492 | |
5b114715 FT |
493 | ret = blk_execute_rq(drive->queue, NULL, rq, 0); |
494 | blk_put_request(rq); | |
5e32132b SL |
495 | /* only call ACPI _PS3 after both drivers are suspended */ |
496 | if (!ret && (((drive->dn % 2) && hwif->drives[0].present | |
497 | && hwif->drives[1].present) | |
498 | || !hwif->drives[0].present | |
499 | || !hwif->drives[1].present)) | |
500 | ide_acpi_set_state(hwif, 0); | |
501 | return ret; | |
1da177e4 LT |
502 | } |
503 | ||
504 | static int generic_ide_resume(struct device *dev) | |
505 | { | |
506 | ide_drive_t *drive = dev->driver_data; | |
e3a59b4d | 507 | ide_hwif_t *hwif = HWIF(drive); |
5b114715 | 508 | struct request *rq; |
1da177e4 LT |
509 | struct request_pm_state rqpm; |
510 | ide_task_t args; | |
0d2157f7 | 511 | int err; |
1da177e4 | 512 | |
e3a59b4d | 513 | /* Call ACPI _STM only once */ |
5e32132b SL |
514 | if (!(drive->dn % 2)) { |
515 | ide_acpi_set_state(hwif, 1); | |
e3a59b4d | 516 | ide_acpi_push_timing(hwif); |
5e32132b | 517 | } |
e3a59b4d HR |
518 | |
519 | ide_acpi_exec_tfs(drive); | |
520 | ||
1da177e4 LT |
521 | memset(&rqpm, 0, sizeof(rqpm)); |
522 | memset(&args, 0, sizeof(args)); | |
5b114715 FT |
523 | rq = blk_get_request(drive->queue, READ, __GFP_WAIT); |
524 | rq->cmd_type = REQ_TYPE_PM_RESUME; | |
525 | rq->cmd_flags |= REQ_PREEMPT; | |
526 | rq->special = &args; | |
527 | rq->data = &rqpm; | |
1da177e4 | 528 | rqpm.pm_step = ide_pm_state_start_resume; |
ca078bae | 529 | rqpm.pm_state = PM_EVENT_ON; |
1da177e4 | 530 | |
5b114715 FT |
531 | err = blk_execute_rq(drive->queue, NULL, rq, 1); |
532 | blk_put_request(rq); | |
0d2157f7 | 533 | |
ce9b2b0a RW |
534 | if (err == 0 && dev->driver) { |
535 | ide_driver_t *drv = to_ide_driver(dev->driver); | |
536 | ||
537 | if (drv->resume) | |
538 | drv->resume(drive); | |
539 | } | |
0d2157f7 LT |
540 | |
541 | return err; | |
1da177e4 LT |
542 | } |
543 | ||
544 | int generic_ide_ioctl(ide_drive_t *drive, struct file *file, struct block_device *bdev, | |
545 | unsigned int cmd, unsigned long arg) | |
546 | { | |
1497943e | 547 | unsigned long flags; |
1da177e4 | 548 | ide_driver_t *drv; |
1da177e4 | 549 | void __user *p = (void __user *)arg; |
1985026d | 550 | int err = 0, (*setfunc)(ide_drive_t *, int); |
1497943e | 551 | u8 *val; |
1da177e4 | 552 | |
1497943e BZ |
553 | switch (cmd) { |
554 | case HDIO_GET_32BIT: val = &drive->io_32bit; goto read_val; | |
555 | case HDIO_GET_KEEPSETTINGS: val = &drive->keep_settings; goto read_val; | |
556 | case HDIO_GET_UNMASKINTR: val = &drive->unmask; goto read_val; | |
557 | case HDIO_GET_DMA: val = &drive->using_dma; goto read_val; | |
558 | case HDIO_SET_32BIT: setfunc = set_io_32bit; goto set_val; | |
559 | case HDIO_SET_KEEPSETTINGS: setfunc = set_ksettings; goto set_val; | |
560 | case HDIO_SET_PIO_MODE: setfunc = set_pio_mode; goto set_val; | |
561 | case HDIO_SET_UNMASKINTR: setfunc = set_unmaskirq; goto set_val; | |
562 | case HDIO_SET_DMA: setfunc = set_using_dma; goto set_val; | |
1da177e4 | 563 | } |
1da177e4 LT |
564 | |
565 | switch (cmd) { | |
1da177e4 LT |
566 | case HDIO_OBSOLETE_IDENTITY: |
567 | case HDIO_GET_IDENTITY: | |
568 | if (bdev != bdev->bd_contains) | |
569 | return -EINVAL; | |
570 | if (drive->id_read == 0) | |
571 | return -ENOMSG; | |
572 | if (copy_to_user(p, drive->id, (cmd == HDIO_GET_IDENTITY) ? sizeof(*drive->id) : 142)) | |
573 | return -EFAULT; | |
574 | return 0; | |
575 | ||
576 | case HDIO_GET_NICE: | |
577 | return put_user(drive->dsc_overlap << IDE_NICE_DSC_OVERLAP | | |
578 | drive->atapi_overlap << IDE_NICE_ATAPI_OVERLAP | | |
92b83c8f | 579 | drive->nice1 << IDE_NICE_1, |
1da177e4 | 580 | (long __user *) arg); |
1da177e4 LT |
581 | #ifdef CONFIG_IDE_TASK_IOCTL |
582 | case HDIO_DRIVE_TASKFILE: | |
583 | if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO)) | |
584 | return -EACCES; | |
585 | switch(drive->media) { | |
586 | case ide_disk: | |
587 | return ide_taskfile_ioctl(drive, cmd, arg); | |
588 | default: | |
589 | return -ENOMSG; | |
590 | } | |
591 | #endif /* CONFIG_IDE_TASK_IOCTL */ | |
592 | ||
593 | case HDIO_DRIVE_CMD: | |
594 | if (!capable(CAP_SYS_RAWIO)) | |
595 | return -EACCES; | |
596 | return ide_cmd_ioctl(drive, cmd, arg); | |
597 | ||
598 | case HDIO_DRIVE_TASK: | |
599 | if (!capable(CAP_SYS_RAWIO)) | |
600 | return -EACCES; | |
601 | return ide_task_ioctl(drive, cmd, arg); | |
1da177e4 LT |
602 | case HDIO_SET_NICE: |
603 | if (!capable(CAP_SYS_ADMIN)) return -EACCES; | |
604 | if (arg != (arg & ((1 << IDE_NICE_DSC_OVERLAP) | (1 << IDE_NICE_1)))) | |
605 | return -EPERM; | |
606 | drive->dsc_overlap = (arg >> IDE_NICE_DSC_OVERLAP) & 1; | |
607 | drv = *(ide_driver_t **)bdev->bd_disk->private_data; | |
608 | if (drive->dsc_overlap && !drv->supports_dsc_overlap) { | |
609 | drive->dsc_overlap = 0; | |
610 | return -EPERM; | |
611 | } | |
612 | drive->nice1 = (arg >> IDE_NICE_1) & 1; | |
613 | return 0; | |
614 | case HDIO_DRIVE_RESET: | |
dbecebca BZ |
615 | if (!capable(CAP_SYS_ADMIN)) |
616 | return -EACCES; | |
617 | ||
1da177e4 LT |
618 | /* |
619 | * Abort the current command on the | |
620 | * group if there is one, taking | |
621 | * care not to allow anything else | |
622 | * to be queued and to die on the | |
623 | * spot if we miss one somehow | |
624 | */ | |
625 | ||
626 | spin_lock_irqsave(&ide_lock, flags); | |
627 | ||
913759ac AC |
628 | if (HWGROUP(drive)->resetting) { |
629 | spin_unlock_irqrestore(&ide_lock, flags); | |
630 | return -EBUSY; | |
631 | } | |
632 | ||
1da177e4 LT |
633 | ide_abort(drive, "drive reset"); |
634 | ||
125e1874 | 635 | BUG_ON(HWGROUP(drive)->handler); |
dbecebca | 636 | |
1da177e4 LT |
637 | /* Ensure nothing gets queued after we |
638 | drop the lock. Reset will clear the busy */ | |
dbecebca | 639 | |
1da177e4 LT |
640 | HWGROUP(drive)->busy = 1; |
641 | spin_unlock_irqrestore(&ide_lock, flags); | |
642 | (void) ide_do_reset(drive); | |
643 | ||
644 | return 0; | |
1da177e4 LT |
645 | case HDIO_GET_BUSSTATE: |
646 | if (!capable(CAP_SYS_ADMIN)) | |
647 | return -EACCES; | |
648 | if (put_user(HWIF(drive)->bus_state, (long __user *)arg)) | |
649 | return -EFAULT; | |
650 | return 0; | |
651 | ||
652 | case HDIO_SET_BUSSTATE: | |
653 | if (!capable(CAP_SYS_ADMIN)) | |
654 | return -EACCES; | |
1da177e4 LT |
655 | return -EOPNOTSUPP; |
656 | default: | |
657 | return -EINVAL; | |
658 | } | |
1497943e BZ |
659 | |
660 | read_val: | |
f9383c42 | 661 | mutex_lock(&ide_setting_mtx); |
1497943e BZ |
662 | spin_lock_irqsave(&ide_lock, flags); |
663 | err = *val; | |
664 | spin_unlock_irqrestore(&ide_lock, flags); | |
f9383c42 | 665 | mutex_unlock(&ide_setting_mtx); |
1497943e BZ |
666 | return err >= 0 ? put_user(err, (long __user *)arg) : err; |
667 | ||
668 | set_val: | |
669 | if (bdev != bdev->bd_contains) | |
670 | err = -EINVAL; | |
671 | else { | |
672 | if (!capable(CAP_SYS_ADMIN)) | |
673 | err = -EACCES; | |
674 | else { | |
f9383c42 | 675 | mutex_lock(&ide_setting_mtx); |
1497943e | 676 | err = setfunc(drive, arg); |
f9383c42 | 677 | mutex_unlock(&ide_setting_mtx); |
1497943e BZ |
678 | } |
679 | } | |
680 | return err; | |
1da177e4 LT |
681 | } |
682 | ||
683 | EXPORT_SYMBOL(generic_ide_ioctl); | |
684 | ||
8604affd BZ |
685 | static int ide_bus_match(struct device *dev, struct device_driver *drv) |
686 | { | |
687 | return 1; | |
688 | } | |
689 | ||
263756ec KS |
690 | static char *media_string(ide_drive_t *drive) |
691 | { | |
692 | switch (drive->media) { | |
693 | case ide_disk: | |
694 | return "disk"; | |
695 | case ide_cdrom: | |
696 | return "cdrom"; | |
697 | case ide_tape: | |
698 | return "tape"; | |
699 | case ide_floppy: | |
700 | return "floppy"; | |
a7a832de DK |
701 | case ide_optical: |
702 | return "optical"; | |
263756ec KS |
703 | default: |
704 | return "UNKNOWN"; | |
705 | } | |
706 | } | |
707 | ||
708 | static ssize_t media_show(struct device *dev, struct device_attribute *attr, char *buf) | |
709 | { | |
710 | ide_drive_t *drive = to_ide_device(dev); | |
711 | return sprintf(buf, "%s\n", media_string(drive)); | |
712 | } | |
713 | ||
714 | static ssize_t drivename_show(struct device *dev, struct device_attribute *attr, char *buf) | |
715 | { | |
716 | ide_drive_t *drive = to_ide_device(dev); | |
717 | return sprintf(buf, "%s\n", drive->name); | |
718 | } | |
719 | ||
720 | static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf) | |
721 | { | |
722 | ide_drive_t *drive = to_ide_device(dev); | |
723 | return sprintf(buf, "ide:m-%s\n", media_string(drive)); | |
724 | } | |
725 | ||
e11b9035 BZ |
726 | static ssize_t model_show(struct device *dev, struct device_attribute *attr, |
727 | char *buf) | |
728 | { | |
729 | ide_drive_t *drive = to_ide_device(dev); | |
730 | return sprintf(buf, "%s\n", drive->id->model); | |
731 | } | |
732 | ||
733 | static ssize_t firmware_show(struct device *dev, struct device_attribute *attr, | |
734 | char *buf) | |
735 | { | |
736 | ide_drive_t *drive = to_ide_device(dev); | |
737 | return sprintf(buf, "%s\n", drive->id->fw_rev); | |
738 | } | |
739 | ||
740 | static ssize_t serial_show(struct device *dev, struct device_attribute *attr, | |
741 | char *buf) | |
742 | { | |
743 | ide_drive_t *drive = to_ide_device(dev); | |
744 | return sprintf(buf, "%s\n", drive->id->serial_no); | |
745 | } | |
746 | ||
263756ec KS |
747 | static struct device_attribute ide_dev_attrs[] = { |
748 | __ATTR_RO(media), | |
749 | __ATTR_RO(drivename), | |
750 | __ATTR_RO(modalias), | |
e11b9035 BZ |
751 | __ATTR_RO(model), |
752 | __ATTR_RO(firmware), | |
753 | __ATTR(serial, 0400, serial_show, NULL), | |
263756ec KS |
754 | __ATTR_NULL |
755 | }; | |
756 | ||
7eff2e7a | 757 | static int ide_uevent(struct device *dev, struct kobj_uevent_env *env) |
263756ec KS |
758 | { |
759 | ide_drive_t *drive = to_ide_device(dev); | |
7eff2e7a KS |
760 | |
761 | add_uevent_var(env, "MEDIA=%s", media_string(drive)); | |
762 | add_uevent_var(env, "DRIVENAME=%s", drive->name); | |
763 | add_uevent_var(env, "MODALIAS=ide:m-%s", media_string(drive)); | |
263756ec KS |
764 | return 0; |
765 | } | |
766 | ||
4031bbe4 RK |
767 | static int generic_ide_probe(struct device *dev) |
768 | { | |
769 | ide_drive_t *drive = to_ide_device(dev); | |
770 | ide_driver_t *drv = to_ide_driver(dev->driver); | |
771 | ||
772 | return drv->probe ? drv->probe(drive) : -ENODEV; | |
773 | } | |
774 | ||
775 | static int generic_ide_remove(struct device *dev) | |
776 | { | |
777 | ide_drive_t *drive = to_ide_device(dev); | |
778 | ide_driver_t *drv = to_ide_driver(dev->driver); | |
779 | ||
780 | if (drv->remove) | |
781 | drv->remove(drive); | |
782 | ||
783 | return 0; | |
784 | } | |
785 | ||
786 | static void generic_ide_shutdown(struct device *dev) | |
787 | { | |
788 | ide_drive_t *drive = to_ide_device(dev); | |
789 | ide_driver_t *drv = to_ide_driver(dev->driver); | |
790 | ||
791 | if (dev->driver && drv->shutdown) | |
792 | drv->shutdown(drive); | |
793 | } | |
794 | ||
1da177e4 LT |
795 | struct bus_type ide_bus_type = { |
796 | .name = "ide", | |
8604affd | 797 | .match = ide_bus_match, |
263756ec | 798 | .uevent = ide_uevent, |
4031bbe4 RK |
799 | .probe = generic_ide_probe, |
800 | .remove = generic_ide_remove, | |
801 | .shutdown = generic_ide_shutdown, | |
263756ec | 802 | .dev_attrs = ide_dev_attrs, |
1da177e4 LT |
803 | .suspend = generic_ide_suspend, |
804 | .resume = generic_ide_resume, | |
805 | }; | |
806 | ||
8604affd BZ |
807 | EXPORT_SYMBOL_GPL(ide_bus_type); |
808 | ||
ebae41a5 BZ |
809 | int ide_vlb_clk; |
810 | EXPORT_SYMBOL_GPL(ide_vlb_clk); | |
811 | ||
812 | module_param_named(vlb_clock, ide_vlb_clk, int, 0); | |
813 | MODULE_PARM_DESC(vlb_clock, "VLB clock frequency (in MHz)"); | |
814 | ||
815 | int ide_pci_clk; | |
816 | EXPORT_SYMBOL_GPL(ide_pci_clk); | |
817 | ||
818 | module_param_named(pci_clock, ide_pci_clk, int, 0); | |
819 | MODULE_PARM_DESC(pci_clock, "PCI bus clock frequency (in MHz)"); | |
820 | ||
6e87543a BZ |
821 | static int ide_set_dev_param_mask(const char *s, struct kernel_param *kp) |
822 | { | |
823 | int a, b, i, j = 1; | |
824 | unsigned int *dev_param_mask = (unsigned int *)kp->arg; | |
825 | ||
826 | if (sscanf(s, "%d.%d:%d", &a, &b, &j) != 3 && | |
827 | sscanf(s, "%d.%d", &a, &b) != 2) | |
828 | return -EINVAL; | |
829 | ||
830 | i = a * MAX_DRIVES + b; | |
831 | ||
832 | if (i >= MAX_HWIFS * MAX_DRIVES || j < 0 || j > 1) | |
833 | return -EINVAL; | |
834 | ||
835 | if (j) | |
836 | *dev_param_mask |= (1 << i); | |
837 | else | |
838 | *dev_param_mask &= (1 << i); | |
839 | ||
840 | return 0; | |
841 | } | |
842 | ||
843 | static unsigned int ide_nodma; | |
844 | ||
845 | module_param_call(nodma, ide_set_dev_param_mask, NULL, &ide_nodma, 0); | |
846 | MODULE_PARM_DESC(nodma, "disallow DMA for a device"); | |
847 | ||
848 | static unsigned int ide_noflush; | |
849 | ||
850 | module_param_call(noflush, ide_set_dev_param_mask, NULL, &ide_noflush, 0); | |
851 | MODULE_PARM_DESC(noflush, "disable flush requests for a device"); | |
852 | ||
853 | static unsigned int ide_noprobe; | |
854 | ||
855 | module_param_call(noprobe, ide_set_dev_param_mask, NULL, &ide_noprobe, 0); | |
856 | MODULE_PARM_DESC(noprobe, "skip probing for a device"); | |
857 | ||
858 | static unsigned int ide_nowerr; | |
859 | ||
860 | module_param_call(nowerr, ide_set_dev_param_mask, NULL, &ide_nowerr, 0); | |
861 | MODULE_PARM_DESC(nowerr, "ignore the WRERR_STAT bit for a device"); | |
862 | ||
4706a7e0 BZ |
863 | static unsigned int ide_cdroms; |
864 | ||
865 | module_param_call(cdrom, ide_set_dev_param_mask, NULL, &ide_cdroms, 0); | |
866 | MODULE_PARM_DESC(cdrom, "force device as a CD-ROM"); | |
867 | ||
868 | struct chs_geom { | |
869 | unsigned int cyl; | |
870 | u8 head; | |
871 | u8 sect; | |
872 | }; | |
873 | ||
874 | static unsigned int ide_disks; | |
875 | static struct chs_geom ide_disks_chs[MAX_HWIFS * MAX_DRIVES]; | |
876 | ||
877 | static int ide_set_disk_chs(const char *str, struct kernel_param *kp) | |
878 | { | |
879 | int a, b, c = 0, h = 0, s = 0, i, j = 1; | |
880 | ||
881 | if (sscanf(str, "%d.%d:%d,%d,%d", &a, &b, &c, &h, &s) != 5 && | |
882 | sscanf(str, "%d.%d:%d", &a, &b, &j) != 3) | |
883 | return -EINVAL; | |
884 | ||
885 | i = a * MAX_DRIVES + b; | |
886 | ||
887 | if (i >= MAX_HWIFS * MAX_DRIVES || j < 0 || j > 1) | |
888 | return -EINVAL; | |
889 | ||
890 | if (c > INT_MAX || h > 255 || s > 255) | |
891 | return -EINVAL; | |
892 | ||
893 | if (j) | |
894 | ide_disks |= (1 << i); | |
895 | else | |
896 | ide_disks &= (1 << i); | |
897 | ||
898 | ide_disks_chs[i].cyl = c; | |
899 | ide_disks_chs[i].head = h; | |
900 | ide_disks_chs[i].sect = s; | |
901 | ||
902 | return 0; | |
903 | } | |
904 | ||
905 | module_param_call(chs, ide_set_disk_chs, NULL, NULL, 0); | |
906 | MODULE_PARM_DESC(chs, "force device as a disk (using CHS)"); | |
907 | ||
6e87543a BZ |
908 | static void ide_dev_apply_params(ide_drive_t *drive) |
909 | { | |
910 | int i = drive->hwif->index * MAX_DRIVES + drive->select.b.unit; | |
911 | ||
912 | if (ide_nodma & (1 << i)) { | |
913 | printk(KERN_INFO "ide: disallowing DMA for %s\n", drive->name); | |
914 | drive->nodma = 1; | |
915 | } | |
916 | if (ide_noflush & (1 << i)) { | |
917 | printk(KERN_INFO "ide: disabling flush requests for %s\n", | |
918 | drive->name); | |
919 | drive->noflush = 1; | |
920 | } | |
921 | if (ide_noprobe & (1 << i)) { | |
922 | printk(KERN_INFO "ide: skipping probe for %s\n", drive->name); | |
923 | drive->noprobe = 1; | |
924 | } | |
925 | if (ide_nowerr & (1 << i)) { | |
926 | printk(KERN_INFO "ide: ignoring the WRERR_STAT bit for %s\n", | |
927 | drive->name); | |
928 | drive->bad_wstat = BAD_R_STAT; | |
929 | } | |
4706a7e0 BZ |
930 | if (ide_cdroms & (1 << i)) { |
931 | printk(KERN_INFO "ide: forcing %s as a CD-ROM\n", drive->name); | |
932 | drive->present = 1; | |
933 | drive->media = ide_cdrom; | |
934 | /* an ATAPI device ignores DRDY */ | |
935 | drive->ready_stat = 0; | |
936 | } | |
937 | if (ide_disks & (1 << i)) { | |
938 | drive->cyl = drive->bios_cyl = ide_disks_chs[i].cyl; | |
939 | drive->head = drive->bios_head = ide_disks_chs[i].head; | |
940 | drive->sect = drive->bios_sect = ide_disks_chs[i].sect; | |
941 | drive->forced_geom = 1; | |
942 | printk(KERN_INFO "ide: forcing %s as a disk (%d/%d/%d)\n", | |
943 | drive->name, | |
944 | drive->cyl, drive->head, drive->sect); | |
945 | drive->present = 1; | |
946 | drive->media = ide_disk; | |
947 | drive->ready_stat = READY_STAT; | |
948 | } | |
6e87543a BZ |
949 | } |
950 | ||
9fd91d95 BZ |
951 | static unsigned int ide_ignore_cable; |
952 | ||
953 | static int ide_set_ignore_cable(const char *s, struct kernel_param *kp) | |
954 | { | |
955 | int i, j = 1; | |
956 | ||
957 | if (sscanf(s, "%d:%d", &i, &j) != 2 && sscanf(s, "%d", &i) != 1) | |
958 | return -EINVAL; | |
959 | ||
960 | if (i >= MAX_HWIFS || j < 0 || j > 1) | |
961 | return -EINVAL; | |
962 | ||
963 | if (j) | |
964 | ide_ignore_cable |= (1 << i); | |
965 | else | |
966 | ide_ignore_cable &= (1 << i); | |
967 | ||
968 | return 0; | |
969 | } | |
970 | ||
971 | module_param_call(ignore_cable, ide_set_ignore_cable, NULL, NULL, 0); | |
972 | MODULE_PARM_DESC(ignore_cable, "ignore cable detection"); | |
973 | ||
974 | void ide_port_apply_params(ide_hwif_t *hwif) | |
975 | { | |
6e87543a BZ |
976 | int i; |
977 | ||
9fd91d95 BZ |
978 | if (ide_ignore_cable & (1 << hwif->index)) { |
979 | printk(KERN_INFO "ide: ignoring cable detection for %s\n", | |
980 | hwif->name); | |
981 | hwif->cbl = ATA_CBL_PATA40_SHORT; | |
982 | } | |
6e87543a BZ |
983 | |
984 | for (i = 0; i < MAX_DRIVES; i++) | |
985 | ide_dev_apply_params(&hwif->drives[i]); | |
9fd91d95 BZ |
986 | } |
987 | ||
1da177e4 LT |
988 | /* |
989 | * This is gets invoked once during initialization, to set *everything* up | |
990 | */ | |
991 | static int __init ide_init(void) | |
992 | { | |
349ae23f RD |
993 | int ret; |
994 | ||
eba8ff94 | 995 | printk(KERN_INFO "Uniform Multi-Platform E-IDE driver\n"); |
537f06c5 | 996 | |
349ae23f RD |
997 | ret = bus_register(&ide_bus_type); |
998 | if (ret < 0) { | |
999 | printk(KERN_WARNING "IDE: bus_register error: %d\n", ret); | |
1000 | return ret; | |
1001 | } | |
1da177e4 | 1002 | |
f74c9141 BZ |
1003 | ide_port_class = class_create(THIS_MODULE, "ide_port"); |
1004 | if (IS_ERR(ide_port_class)) { | |
1005 | ret = PTR_ERR(ide_port_class); | |
1006 | goto out_port_class; | |
1007 | } | |
f74c9141 | 1008 | |
5cbf79cd | 1009 | proc_ide_create(); |
1da177e4 | 1010 | |
1da177e4 | 1011 | return 0; |
f74c9141 BZ |
1012 | |
1013 | out_port_class: | |
1014 | bus_unregister(&ide_bus_type); | |
1015 | ||
1016 | return ret; | |
1da177e4 LT |
1017 | } |
1018 | ||
931ee0dc | 1019 | static void __exit ide_exit(void) |
1da177e4 | 1020 | { |
1da177e4 | 1021 | proc_ide_destroy(); |
1da177e4 | 1022 | |
f74c9141 BZ |
1023 | class_destroy(ide_port_class); |
1024 | ||
1da177e4 LT |
1025 | bus_unregister(&ide_bus_type); |
1026 | } | |
1027 | ||
1da177e4 | 1028 | module_init(ide_init); |
931ee0dc | 1029 | module_exit(ide_exit); |
1da177e4 | 1030 | |
931ee0dc | 1031 | MODULE_LICENSE("GPL"); |