Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
59bca8cc | 2 | * Copyright (C) 1994-1998 Linus Torvalds & authors (see below) |
fc410698 | 3 | * Copyright (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> | |
1da177e4 LT |
53 | #include <linux/interrupt.h> |
54 | #include <linux/major.h> | |
55 | #include <linux/errno.h> | |
56 | #include <linux/genhd.h> | |
1da177e4 LT |
57 | #include <linux/slab.h> |
58 | #include <linux/init.h> | |
59 | #include <linux/pci.h> | |
1da177e4 | 60 | #include <linux/ide.h> |
1da177e4 | 61 | #include <linux/completion.h> |
1da177e4 | 62 | #include <linux/device.h> |
1da177e4 LT |
63 | |
64 | ||
65 | /* default maximum number of failures */ | |
66 | #define IDE_DEFAULT_MAX_FAILURES 1 | |
67 | ||
f74c9141 BZ |
68 | struct class *ide_port_class; |
69 | ||
1da177e4 LT |
70 | static const u8 ide_hwif_to_major[] = { IDE0_MAJOR, IDE1_MAJOR, |
71 | IDE2_MAJOR, IDE3_MAJOR, | |
72 | IDE4_MAJOR, IDE5_MAJOR, | |
73 | IDE6_MAJOR, IDE7_MAJOR, | |
74 | IDE8_MAJOR, IDE9_MAJOR }; | |
75 | ||
ef29888e | 76 | DEFINE_MUTEX(ide_cfg_mtx); |
1da177e4 | 77 | |
931ee0dc BZ |
78 | __cacheline_aligned_in_smp DEFINE_SPINLOCK(ide_lock); |
79 | EXPORT_SYMBOL(ide_lock); | |
1da177e4 | 80 | |
43514ed1 BZ |
81 | static void ide_port_init_devices_data(ide_hwif_t *); |
82 | ||
1da177e4 LT |
83 | /* |
84 | * Do not even *think* about calling this! | |
85 | */ | |
cbb010c1 | 86 | void ide_init_port_data(ide_hwif_t *hwif, unsigned int index) |
1da177e4 | 87 | { |
1da177e4 LT |
88 | /* bulk initialize hwif & drive info with zeros */ |
89 | memset(hwif, 0, sizeof(ide_hwif_t)); | |
90 | ||
91 | /* fill in any non-zero initial values */ | |
92 | hwif->index = index; | |
93 | hwif->major = ide_hwif_to_major[index]; | |
94 | ||
95 | hwif->name[0] = 'i'; | |
96 | hwif->name[1] = 'd'; | |
97 | hwif->name[2] = 'e'; | |
98 | hwif->name[3] = '0' + index; | |
99 | ||
100 | hwif->bus_state = BUSSTATE_ON; | |
101 | ||
f36d4024 | 102 | init_completion(&hwif->gendev_rel_comp); |
1da177e4 | 103 | |
374e042c | 104 | hwif->tp_ops = &default_tp_ops; |
43514ed1 BZ |
105 | |
106 | ide_port_init_devices_data(hwif); | |
107 | } | |
43514ed1 BZ |
108 | |
109 | static void ide_port_init_devices_data(ide_hwif_t *hwif) | |
110 | { | |
111 | int unit; | |
112 | ||
1da177e4 LT |
113 | for (unit = 0; unit < MAX_DRIVES; ++unit) { |
114 | ide_drive_t *drive = &hwif->drives[unit]; | |
43514ed1 BZ |
115 | u8 j = (hwif->index * MAX_DRIVES) + unit; |
116 | ||
117 | memset(drive, 0, sizeof(*drive)); | |
1da177e4 LT |
118 | |
119 | drive->media = ide_disk; | |
120 | drive->select.all = (unit<<4)|0xa0; | |
121 | drive->hwif = hwif; | |
1da177e4 LT |
122 | drive->ready_stat = READY_STAT; |
123 | drive->bad_wstat = BAD_W_STAT; | |
124 | drive->special.b.recalibrate = 1; | |
125 | drive->special.b.set_geometry = 1; | |
126 | drive->name[0] = 'h'; | |
127 | drive->name[1] = 'd'; | |
43514ed1 | 128 | drive->name[2] = 'a' + j; |
1da177e4 | 129 | drive->max_failures = IDE_DEFAULT_MAX_FAILURES; |
43514ed1 | 130 | |
1da177e4 | 131 | INIT_LIST_HEAD(&drive->list); |
f36d4024 | 132 | init_completion(&drive->gendev_rel_comp); |
1da177e4 LT |
133 | } |
134 | } | |
43514ed1 | 135 | |
71bf9f6f | 136 | /* Called with ide_lock held. */ |
2dde7861 | 137 | static void __ide_port_unregister_devices(ide_hwif_t *hwif) |
71bf9f6f BZ |
138 | { |
139 | int i; | |
140 | ||
141 | for (i = 0; i < MAX_DRIVES; i++) { | |
142 | ide_drive_t *drive = &hwif->drives[i]; | |
143 | ||
144 | if (drive->present) { | |
145 | spin_unlock_irq(&ide_lock); | |
146 | device_unregister(&drive->gendev); | |
147 | wait_for_completion(&drive->gendev_rel_comp); | |
148 | spin_lock_irq(&ide_lock); | |
149 | } | |
150 | } | |
151 | } | |
152 | ||
2dde7861 BZ |
153 | void ide_port_unregister_devices(ide_hwif_t *hwif) |
154 | { | |
155 | mutex_lock(&ide_cfg_mtx); | |
156 | spin_lock_irq(&ide_lock); | |
157 | __ide_port_unregister_devices(hwif); | |
158 | hwif->present = 0; | |
159 | ide_port_init_devices_data(hwif); | |
160 | spin_unlock_irq(&ide_lock); | |
161 | mutex_unlock(&ide_cfg_mtx); | |
162 | } | |
163 | EXPORT_SYMBOL_GPL(ide_port_unregister_devices); | |
164 | ||
1da177e4 | 165 | /** |
020e322d | 166 | * ide_unregister - free an IDE interface |
387750c3 | 167 | * @hwif: IDE interface |
1da177e4 LT |
168 | * |
169 | * Perform the final unregister of an IDE interface. At the moment | |
170 | * we don't refcount interfaces so this will also get split up. | |
171 | * | |
172 | * Locking: | |
173 | * The caller must not hold the IDE locks | |
174 | * The drive present/vanishing is not yet properly locked | |
175 | * Take care with the callbacks. These have been split to avoid | |
176 | * deadlocking the IDE layer. The shutdown callback is called | |
177 | * before we take the lock and free resources. It is up to the | |
178 | * caller to be sure there is no pending I/O here, and that | |
020e322d SS |
179 | * the interface will not be reopened (present/vanishing locking |
180 | * isn't yet done BTW). After we commit to the final kill we | |
1da177e4 LT |
181 | * call the cleanup callback with the ide locks held. |
182 | * | |
183 | * Unregister restores the hwif structures to the default state. | |
184 | * This is raving bonkers. | |
185 | */ | |
186 | ||
387750c3 | 187 | void ide_unregister(ide_hwif_t *hwif) |
1da177e4 | 188 | { |
387750c3 | 189 | ide_hwif_t *g; |
1da177e4 | 190 | ide_hwgroup_t *hwgroup; |
71bf9f6f | 191 | int irq_count = 0; |
1da177e4 | 192 | |
1da177e4 LT |
193 | BUG_ON(in_interrupt()); |
194 | BUG_ON(irqs_disabled()); | |
bd8a59e2 | 195 | |
ef29888e | 196 | mutex_lock(&ide_cfg_mtx); |
1da177e4 | 197 | |
bd8a59e2 BZ |
198 | spin_lock_irq(&ide_lock); |
199 | if (hwif->present) { | |
200 | __ide_port_unregister_devices(hwif); | |
201 | hwif->present = 0; | |
202 | } | |
1da177e4 LT |
203 | spin_unlock_irq(&ide_lock); |
204 | ||
5cbf79cd | 205 | ide_proc_unregister_port(hwif); |
1da177e4 LT |
206 | |
207 | hwgroup = hwif->hwgroup; | |
208 | /* | |
209 | * free the irq if we were the only hwif using it | |
210 | */ | |
211 | g = hwgroup->hwif; | |
212 | do { | |
213 | if (g->irq == hwif->irq) | |
214 | ++irq_count; | |
215 | g = g->next; | |
216 | } while (g != hwgroup->hwif); | |
217 | if (irq_count == 1) | |
218 | free_irq(hwif->irq, hwgroup); | |
219 | ||
96e5ad30 | 220 | ide_remove_port_from_hwgroup(hwif); |
1da177e4 | 221 | |
f74c9141 | 222 | device_unregister(hwif->portdev); |
1da177e4 | 223 | device_unregister(&hwif->gendev); |
f36d4024 | 224 | wait_for_completion(&hwif->gendev_rel_comp); |
1da177e4 LT |
225 | |
226 | /* | |
227 | * Remove us from the kernel's knowledge | |
228 | */ | |
229 | blk_unregister_region(MKDEV(hwif->major, 0), MAX_DRIVES<<PARTN_BITS); | |
230 | kfree(hwif->sg_table); | |
231 | unregister_blkdev(hwif->major, hwif->name); | |
1da177e4 | 232 | |
93de00fd | 233 | if (hwif->dma_base) |
0d1bad21 | 234 | ide_release_dma_engine(hwif); |
1da177e4 | 235 | |
ef29888e | 236 | mutex_unlock(&ide_cfg_mtx); |
1da177e4 LT |
237 | } |
238 | ||
57c802e8 BZ |
239 | void ide_init_port_hw(ide_hwif_t *hwif, hw_regs_t *hw) |
240 | { | |
4c3032d8 | 241 | memcpy(&hwif->io_ports, &hw->io_ports, sizeof(hwif->io_ports)); |
57c802e8 | 242 | hwif->irq = hw->irq; |
57c802e8 | 243 | hwif->chipset = hw->chipset; |
c56c5648 BZ |
244 | hwif->dev = hw->dev; |
245 | hwif->gendev.parent = hw->parent ? hw->parent : hw->dev; | |
57c802e8 | 246 | hwif->ack_intr = hw->ack_intr; |
d6276b5f | 247 | hwif->config_data = hw->config; |
57c802e8 | 248 | } |
57c802e8 | 249 | |
1da177e4 LT |
250 | /* |
251 | * Locks for IDE setting functionality | |
252 | */ | |
253 | ||
f9383c42 | 254 | DEFINE_MUTEX(ide_setting_mtx); |
1da177e4 | 255 | |
f9383c42 | 256 | EXPORT_SYMBOL_GPL(ide_setting_mtx); |
1497943e | 257 | |
1da177e4 LT |
258 | /** |
259 | * ide_spin_wait_hwgroup - wait for group | |
260 | * @drive: drive in the group | |
261 | * | |
262 | * Wait for an IDE device group to go non busy and then return | |
263 | * holding the ide_lock which guards the hwgroup->busy status | |
264 | * and right to use it. | |
265 | */ | |
266 | ||
267 | int ide_spin_wait_hwgroup (ide_drive_t *drive) | |
268 | { | |
269 | ide_hwgroup_t *hwgroup = HWGROUP(drive); | |
270 | unsigned long timeout = jiffies + (3 * HZ); | |
271 | ||
272 | spin_lock_irq(&ide_lock); | |
273 | ||
274 | while (hwgroup->busy) { | |
275 | unsigned long lflags; | |
276 | spin_unlock_irq(&ide_lock); | |
277 | local_irq_set(lflags); | |
278 | if (time_after(jiffies, timeout)) { | |
279 | local_irq_restore(lflags); | |
280 | printk(KERN_ERR "%s: channel busy\n", drive->name); | |
281 | return -EBUSY; | |
282 | } | |
283 | local_irq_restore(lflags); | |
284 | spin_lock_irq(&ide_lock); | |
285 | } | |
286 | return 0; | |
287 | } | |
288 | ||
289 | EXPORT_SYMBOL(ide_spin_wait_hwgroup); | |
290 | ||
7662d046 | 291 | int set_io_32bit(ide_drive_t *drive, int arg) |
1da177e4 | 292 | { |
1497943e BZ |
293 | if (drive->no_io_32bit) |
294 | return -EPERM; | |
295 | ||
296 | if (arg < 0 || arg > 1 + (SUPPORT_VLB_SYNC << 1)) | |
297 | return -EINVAL; | |
298 | ||
644a9d76 BZ |
299 | if (ide_spin_wait_hwgroup(drive)) |
300 | return -EBUSY; | |
301 | ||
1da177e4 | 302 | drive->io_32bit = arg; |
644a9d76 BZ |
303 | |
304 | spin_unlock_irq(&ide_lock); | |
305 | ||
1da177e4 LT |
306 | return 0; |
307 | } | |
308 | ||
1497943e BZ |
309 | static int set_ksettings(ide_drive_t *drive, int arg) |
310 | { | |
311 | if (arg < 0 || arg > 1) | |
312 | return -EINVAL; | |
313 | ||
314 | if (ide_spin_wait_hwgroup(drive)) | |
315 | return -EBUSY; | |
316 | drive->keep_settings = arg; | |
317 | spin_unlock_irq(&ide_lock); | |
318 | ||
319 | return 0; | |
320 | } | |
321 | ||
7662d046 | 322 | int set_using_dma(ide_drive_t *drive, int arg) |
1da177e4 LT |
323 | { |
324 | #ifdef CONFIG_BLK_DEV_IDEDMA | |
87996204 BZ |
325 | ide_hwif_t *hwif = drive->hwif; |
326 | int err = -EPERM; | |
327 | ||
1497943e BZ |
328 | if (arg < 0 || arg > 1) |
329 | return -EINVAL; | |
330 | ||
4dde4492 | 331 | if ((drive->driveid->capability & 1) == 0) |
87996204 BZ |
332 | goto out; |
333 | ||
5e37bdc0 | 334 | if (hwif->dma_ops == NULL) |
87996204 BZ |
335 | goto out; |
336 | ||
337 | err = -EBUSY; | |
338 | if (ide_spin_wait_hwgroup(drive)) | |
339 | goto out; | |
340 | /* | |
341 | * set ->busy flag, unlock and let it ride | |
342 | */ | |
343 | hwif->hwgroup->busy = 1; | |
344 | spin_unlock_irq(&ide_lock); | |
345 | ||
346 | err = 0; | |
347 | ||
1da177e4 | 348 | if (arg) { |
23b1bd45 | 349 | if (ide_set_dma(drive)) |
87996204 | 350 | err = -EIO; |
7469aaf6 BZ |
351 | } else |
352 | ide_dma_off(drive); | |
87996204 BZ |
353 | |
354 | /* | |
355 | * lock, clear ->busy flag and unlock before leaving | |
356 | */ | |
357 | spin_lock_irq(&ide_lock); | |
358 | hwif->hwgroup->busy = 0; | |
359 | spin_unlock_irq(&ide_lock); | |
360 | out: | |
361 | return err; | |
1da177e4 | 362 | #else |
1497943e BZ |
363 | if (arg < 0 || arg > 1) |
364 | return -EINVAL; | |
365 | ||
1da177e4 LT |
366 | return -EPERM; |
367 | #endif | |
368 | } | |
369 | ||
7662d046 | 370 | int set_pio_mode(ide_drive_t *drive, int arg) |
1da177e4 | 371 | { |
5b114715 | 372 | struct request *rq; |
784506cb | 373 | ide_hwif_t *hwif = drive->hwif; |
ac95beed | 374 | const struct ide_port_ops *port_ops = hwif->port_ops; |
1da177e4 | 375 | |
1497943e BZ |
376 | if (arg < 0 || arg > 255) |
377 | return -EINVAL; | |
378 | ||
ac95beed | 379 | if (port_ops == NULL || port_ops->set_pio_mode == NULL || |
784506cb | 380 | (hwif->host_flags & IDE_HFLAG_NO_SET_MODE)) |
1da177e4 | 381 | return -ENOSYS; |
26bcb879 | 382 | |
1da177e4 LT |
383 | if (drive->special.b.set_tune) |
384 | return -EBUSY; | |
145b75e9 | 385 | |
5b114715 FT |
386 | rq = blk_get_request(drive->queue, READ, __GFP_WAIT); |
387 | rq->cmd_type = REQ_TYPE_ATA_TASKFILE; | |
145b75e9 | 388 | |
1da177e4 LT |
389 | drive->tune_req = (u8) arg; |
390 | drive->special.b.set_tune = 1; | |
5b114715 FT |
391 | |
392 | blk_execute_rq(drive->queue, NULL, rq, 0); | |
393 | blk_put_request(rq); | |
394 | ||
1da177e4 LT |
395 | return 0; |
396 | } | |
397 | ||
1497943e BZ |
398 | static int set_unmaskirq(ide_drive_t *drive, int arg) |
399 | { | |
400 | if (drive->no_unmask) | |
401 | return -EPERM; | |
402 | ||
403 | if (arg < 0 || arg > 1) | |
404 | return -EINVAL; | |
405 | ||
406 | if (ide_spin_wait_hwgroup(drive)) | |
407 | return -EBUSY; | |
408 | drive->unmask = arg; | |
409 | spin_unlock_irq(&ide_lock); | |
410 | ||
411 | return 0; | |
412 | } | |
413 | ||
b887d2e6 | 414 | static int generic_ide_suspend(struct device *dev, pm_message_t mesg) |
1da177e4 LT |
415 | { |
416 | ide_drive_t *drive = dev->driver_data; | |
e3a59b4d | 417 | ide_hwif_t *hwif = HWIF(drive); |
5b114715 | 418 | struct request *rq; |
1da177e4 LT |
419 | struct request_pm_state rqpm; |
420 | ide_task_t args; | |
5e32132b | 421 | int ret; |
1da177e4 | 422 | |
e3a59b4d HR |
423 | /* Call ACPI _GTM only once */ |
424 | if (!(drive->dn % 2)) | |
425 | ide_acpi_get_timing(hwif); | |
426 | ||
1da177e4 LT |
427 | memset(&rqpm, 0, sizeof(rqpm)); |
428 | memset(&args, 0, sizeof(args)); | |
5b114715 FT |
429 | rq = blk_get_request(drive->queue, READ, __GFP_WAIT); |
430 | rq->cmd_type = REQ_TYPE_PM_SUSPEND; | |
431 | rq->special = &args; | |
432 | rq->data = &rqpm; | |
1da177e4 | 433 | rqpm.pm_step = ide_pm_state_start_suspend; |
b887d2e6 DB |
434 | if (mesg.event == PM_EVENT_PRETHAW) |
435 | mesg.event = PM_EVENT_FREEZE; | |
436 | rqpm.pm_state = mesg.event; | |
1da177e4 | 437 | |
5b114715 FT |
438 | ret = blk_execute_rq(drive->queue, NULL, rq, 0); |
439 | blk_put_request(rq); | |
5e32132b SL |
440 | /* only call ACPI _PS3 after both drivers are suspended */ |
441 | if (!ret && (((drive->dn % 2) && hwif->drives[0].present | |
442 | && hwif->drives[1].present) | |
443 | || !hwif->drives[0].present | |
444 | || !hwif->drives[1].present)) | |
445 | ide_acpi_set_state(hwif, 0); | |
446 | return ret; | |
1da177e4 LT |
447 | } |
448 | ||
449 | static int generic_ide_resume(struct device *dev) | |
450 | { | |
451 | ide_drive_t *drive = dev->driver_data; | |
e3a59b4d | 452 | ide_hwif_t *hwif = HWIF(drive); |
5b114715 | 453 | struct request *rq; |
1da177e4 LT |
454 | struct request_pm_state rqpm; |
455 | ide_task_t args; | |
0d2157f7 | 456 | int err; |
1da177e4 | 457 | |
e3a59b4d | 458 | /* Call ACPI _STM only once */ |
5e32132b SL |
459 | if (!(drive->dn % 2)) { |
460 | ide_acpi_set_state(hwif, 1); | |
e3a59b4d | 461 | ide_acpi_push_timing(hwif); |
5e32132b | 462 | } |
e3a59b4d HR |
463 | |
464 | ide_acpi_exec_tfs(drive); | |
465 | ||
1da177e4 LT |
466 | memset(&rqpm, 0, sizeof(rqpm)); |
467 | memset(&args, 0, sizeof(args)); | |
5b114715 FT |
468 | rq = blk_get_request(drive->queue, READ, __GFP_WAIT); |
469 | rq->cmd_type = REQ_TYPE_PM_RESUME; | |
470 | rq->cmd_flags |= REQ_PREEMPT; | |
471 | rq->special = &args; | |
472 | rq->data = &rqpm; | |
1da177e4 | 473 | rqpm.pm_step = ide_pm_state_start_resume; |
ca078bae | 474 | rqpm.pm_state = PM_EVENT_ON; |
1da177e4 | 475 | |
5b114715 FT |
476 | err = blk_execute_rq(drive->queue, NULL, rq, 1); |
477 | blk_put_request(rq); | |
0d2157f7 | 478 | |
ce9b2b0a RW |
479 | if (err == 0 && dev->driver) { |
480 | ide_driver_t *drv = to_ide_driver(dev->driver); | |
481 | ||
482 | if (drv->resume) | |
483 | drv->resume(drive); | |
484 | } | |
0d2157f7 LT |
485 | |
486 | return err; | |
1da177e4 LT |
487 | } |
488 | ||
64a8f00f | 489 | static int generic_drive_reset(ide_drive_t *drive) |
79e36a9f EO |
490 | { |
491 | struct request *rq; | |
64a8f00f | 492 | int ret = 0; |
79e36a9f EO |
493 | |
494 | rq = blk_get_request(drive->queue, READ, __GFP_WAIT); | |
495 | rq->cmd_type = REQ_TYPE_SPECIAL; | |
496 | rq->cmd_len = 1; | |
497 | rq->cmd[0] = REQ_DRIVE_RESET; | |
498 | rq->cmd_flags |= REQ_SOFTBARRIER; | |
64a8f00f EO |
499 | if (blk_execute_rq(drive->queue, NULL, rq, 1)) |
500 | ret = rq->errors; | |
79e36a9f | 501 | blk_put_request(rq); |
64a8f00f | 502 | return ret; |
79e36a9f EO |
503 | } |
504 | ||
1da177e4 LT |
505 | int generic_ide_ioctl(ide_drive_t *drive, struct file *file, struct block_device *bdev, |
506 | unsigned int cmd, unsigned long arg) | |
507 | { | |
1497943e | 508 | unsigned long flags; |
1da177e4 | 509 | ide_driver_t *drv; |
1da177e4 | 510 | void __user *p = (void __user *)arg; |
1985026d | 511 | int err = 0, (*setfunc)(ide_drive_t *, int); |
1497943e | 512 | u8 *val; |
1da177e4 | 513 | |
1497943e BZ |
514 | switch (cmd) { |
515 | case HDIO_GET_32BIT: val = &drive->io_32bit; goto read_val; | |
516 | case HDIO_GET_KEEPSETTINGS: val = &drive->keep_settings; goto read_val; | |
517 | case HDIO_GET_UNMASKINTR: val = &drive->unmask; goto read_val; | |
518 | case HDIO_GET_DMA: val = &drive->using_dma; goto read_val; | |
519 | case HDIO_SET_32BIT: setfunc = set_io_32bit; goto set_val; | |
520 | case HDIO_SET_KEEPSETTINGS: setfunc = set_ksettings; goto set_val; | |
521 | case HDIO_SET_PIO_MODE: setfunc = set_pio_mode; goto set_val; | |
522 | case HDIO_SET_UNMASKINTR: setfunc = set_unmaskirq; goto set_val; | |
523 | case HDIO_SET_DMA: setfunc = set_using_dma; goto set_val; | |
1da177e4 | 524 | } |
1da177e4 LT |
525 | |
526 | switch (cmd) { | |
1da177e4 LT |
527 | case HDIO_OBSOLETE_IDENTITY: |
528 | case HDIO_GET_IDENTITY: | |
529 | if (bdev != bdev->bd_contains) | |
530 | return -EINVAL; | |
531 | if (drive->id_read == 0) | |
532 | return -ENOMSG; | |
533 | if (copy_to_user(p, drive->id, (cmd == HDIO_GET_IDENTITY) ? sizeof(*drive->id) : 142)) | |
534 | return -EFAULT; | |
535 | return 0; | |
536 | ||
537 | case HDIO_GET_NICE: | |
538 | return put_user(drive->dsc_overlap << IDE_NICE_DSC_OVERLAP | | |
539 | drive->atapi_overlap << IDE_NICE_ATAPI_OVERLAP | | |
92b83c8f | 540 | drive->nice1 << IDE_NICE_1, |
1da177e4 | 541 | (long __user *) arg); |
1da177e4 LT |
542 | #ifdef CONFIG_IDE_TASK_IOCTL |
543 | case HDIO_DRIVE_TASKFILE: | |
544 | if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO)) | |
545 | return -EACCES; | |
546 | switch(drive->media) { | |
547 | case ide_disk: | |
548 | return ide_taskfile_ioctl(drive, cmd, arg); | |
549 | default: | |
550 | return -ENOMSG; | |
551 | } | |
552 | #endif /* CONFIG_IDE_TASK_IOCTL */ | |
553 | ||
554 | case HDIO_DRIVE_CMD: | |
555 | if (!capable(CAP_SYS_RAWIO)) | |
556 | return -EACCES; | |
557 | return ide_cmd_ioctl(drive, cmd, arg); | |
558 | ||
559 | case HDIO_DRIVE_TASK: | |
560 | if (!capable(CAP_SYS_RAWIO)) | |
561 | return -EACCES; | |
562 | return ide_task_ioctl(drive, cmd, arg); | |
1da177e4 LT |
563 | case HDIO_SET_NICE: |
564 | if (!capable(CAP_SYS_ADMIN)) return -EACCES; | |
565 | if (arg != (arg & ((1 << IDE_NICE_DSC_OVERLAP) | (1 << IDE_NICE_1)))) | |
566 | return -EPERM; | |
567 | drive->dsc_overlap = (arg >> IDE_NICE_DSC_OVERLAP) & 1; | |
568 | drv = *(ide_driver_t **)bdev->bd_disk->private_data; | |
569 | if (drive->dsc_overlap && !drv->supports_dsc_overlap) { | |
570 | drive->dsc_overlap = 0; | |
571 | return -EPERM; | |
572 | } | |
573 | drive->nice1 = (arg >> IDE_NICE_1) & 1; | |
574 | return 0; | |
575 | case HDIO_DRIVE_RESET: | |
dbecebca BZ |
576 | if (!capable(CAP_SYS_ADMIN)) |
577 | return -EACCES; | |
578 | ||
64a8f00f | 579 | return generic_drive_reset(drive); |
79e36a9f | 580 | |
1da177e4 LT |
581 | case HDIO_GET_BUSSTATE: |
582 | if (!capable(CAP_SYS_ADMIN)) | |
583 | return -EACCES; | |
584 | if (put_user(HWIF(drive)->bus_state, (long __user *)arg)) | |
585 | return -EFAULT; | |
586 | return 0; | |
587 | ||
588 | case HDIO_SET_BUSSTATE: | |
589 | if (!capable(CAP_SYS_ADMIN)) | |
590 | return -EACCES; | |
1da177e4 LT |
591 | return -EOPNOTSUPP; |
592 | default: | |
593 | return -EINVAL; | |
594 | } | |
1497943e BZ |
595 | |
596 | read_val: | |
f9383c42 | 597 | mutex_lock(&ide_setting_mtx); |
1497943e BZ |
598 | spin_lock_irqsave(&ide_lock, flags); |
599 | err = *val; | |
600 | spin_unlock_irqrestore(&ide_lock, flags); | |
f9383c42 | 601 | mutex_unlock(&ide_setting_mtx); |
1497943e BZ |
602 | return err >= 0 ? put_user(err, (long __user *)arg) : err; |
603 | ||
604 | set_val: | |
605 | if (bdev != bdev->bd_contains) | |
606 | err = -EINVAL; | |
607 | else { | |
608 | if (!capable(CAP_SYS_ADMIN)) | |
609 | err = -EACCES; | |
610 | else { | |
f9383c42 | 611 | mutex_lock(&ide_setting_mtx); |
1497943e | 612 | err = setfunc(drive, arg); |
f9383c42 | 613 | mutex_unlock(&ide_setting_mtx); |
1497943e BZ |
614 | } |
615 | } | |
616 | return err; | |
1da177e4 LT |
617 | } |
618 | ||
619 | EXPORT_SYMBOL(generic_ide_ioctl); | |
620 | ||
08da591e BZ |
621 | /** |
622 | * ide_device_get - get an additional reference to a ide_drive_t | |
623 | * @drive: device to get a reference to | |
624 | * | |
625 | * Gets a reference to the ide_drive_t and increments the use count of the | |
626 | * underlying LLDD module. | |
627 | */ | |
628 | int ide_device_get(ide_drive_t *drive) | |
629 | { | |
630 | struct device *host_dev; | |
631 | struct module *module; | |
632 | ||
633 | if (!get_device(&drive->gendev)) | |
634 | return -ENXIO; | |
635 | ||
636 | host_dev = drive->hwif->host->dev[0]; | |
637 | module = host_dev ? host_dev->driver->owner : NULL; | |
638 | ||
639 | if (module && !try_module_get(module)) { | |
640 | put_device(&drive->gendev); | |
641 | return -ENXIO; | |
642 | } | |
643 | ||
644 | return 0; | |
645 | } | |
646 | EXPORT_SYMBOL_GPL(ide_device_get); | |
647 | ||
648 | /** | |
649 | * ide_device_put - release a reference to a ide_drive_t | |
650 | * @drive: device to release a reference on | |
651 | * | |
652 | * Release a reference to the ide_drive_t and decrements the use count of | |
653 | * the underlying LLDD module. | |
654 | */ | |
655 | void ide_device_put(ide_drive_t *drive) | |
656 | { | |
657 | #ifdef CONFIG_MODULE_UNLOAD | |
658 | struct device *host_dev = drive->hwif->host->dev[0]; | |
659 | struct module *module = host_dev ? host_dev->driver->owner : NULL; | |
660 | ||
661 | if (module) | |
662 | module_put(module); | |
663 | #endif | |
664 | put_device(&drive->gendev); | |
665 | } | |
666 | EXPORT_SYMBOL_GPL(ide_device_put); | |
667 | ||
8604affd BZ |
668 | static int ide_bus_match(struct device *dev, struct device_driver *drv) |
669 | { | |
670 | return 1; | |
671 | } | |
672 | ||
263756ec KS |
673 | static char *media_string(ide_drive_t *drive) |
674 | { | |
675 | switch (drive->media) { | |
676 | case ide_disk: | |
677 | return "disk"; | |
678 | case ide_cdrom: | |
679 | return "cdrom"; | |
680 | case ide_tape: | |
681 | return "tape"; | |
682 | case ide_floppy: | |
683 | return "floppy"; | |
a7a832de DK |
684 | case ide_optical: |
685 | return "optical"; | |
263756ec KS |
686 | default: |
687 | return "UNKNOWN"; | |
688 | } | |
689 | } | |
690 | ||
691 | static ssize_t media_show(struct device *dev, struct device_attribute *attr, char *buf) | |
692 | { | |
693 | ide_drive_t *drive = to_ide_device(dev); | |
694 | return sprintf(buf, "%s\n", media_string(drive)); | |
695 | } | |
696 | ||
697 | static ssize_t drivename_show(struct device *dev, struct device_attribute *attr, char *buf) | |
698 | { | |
699 | ide_drive_t *drive = to_ide_device(dev); | |
700 | return sprintf(buf, "%s\n", drive->name); | |
701 | } | |
702 | ||
703 | static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf) | |
704 | { | |
705 | ide_drive_t *drive = to_ide_device(dev); | |
706 | return sprintf(buf, "ide:m-%s\n", media_string(drive)); | |
707 | } | |
708 | ||
e11b9035 BZ |
709 | static ssize_t model_show(struct device *dev, struct device_attribute *attr, |
710 | char *buf) | |
711 | { | |
712 | ide_drive_t *drive = to_ide_device(dev); | |
4dde4492 | 713 | return sprintf(buf, "%s\n", (char *)&drive->id[ATA_ID_PROD]); |
e11b9035 BZ |
714 | } |
715 | ||
716 | static ssize_t firmware_show(struct device *dev, struct device_attribute *attr, | |
717 | char *buf) | |
718 | { | |
719 | ide_drive_t *drive = to_ide_device(dev); | |
4dde4492 | 720 | return sprintf(buf, "%s\n", (char *)&drive->id[ATA_ID_FW_REV]); |
e11b9035 BZ |
721 | } |
722 | ||
723 | static ssize_t serial_show(struct device *dev, struct device_attribute *attr, | |
724 | char *buf) | |
725 | { | |
726 | ide_drive_t *drive = to_ide_device(dev); | |
4dde4492 | 727 | return sprintf(buf, "%s\n", (char *)&drive->id[ATA_ID_SERNO]); |
e11b9035 BZ |
728 | } |
729 | ||
263756ec KS |
730 | static struct device_attribute ide_dev_attrs[] = { |
731 | __ATTR_RO(media), | |
732 | __ATTR_RO(drivename), | |
733 | __ATTR_RO(modalias), | |
e11b9035 BZ |
734 | __ATTR_RO(model), |
735 | __ATTR_RO(firmware), | |
736 | __ATTR(serial, 0400, serial_show, NULL), | |
263756ec KS |
737 | __ATTR_NULL |
738 | }; | |
739 | ||
7eff2e7a | 740 | static int ide_uevent(struct device *dev, struct kobj_uevent_env *env) |
263756ec KS |
741 | { |
742 | ide_drive_t *drive = to_ide_device(dev); | |
7eff2e7a KS |
743 | |
744 | add_uevent_var(env, "MEDIA=%s", media_string(drive)); | |
745 | add_uevent_var(env, "DRIVENAME=%s", drive->name); | |
746 | add_uevent_var(env, "MODALIAS=ide:m-%s", media_string(drive)); | |
263756ec KS |
747 | return 0; |
748 | } | |
749 | ||
4031bbe4 RK |
750 | static int generic_ide_probe(struct device *dev) |
751 | { | |
752 | ide_drive_t *drive = to_ide_device(dev); | |
753 | ide_driver_t *drv = to_ide_driver(dev->driver); | |
754 | ||
755 | return drv->probe ? drv->probe(drive) : -ENODEV; | |
756 | } | |
757 | ||
758 | static int generic_ide_remove(struct device *dev) | |
759 | { | |
760 | ide_drive_t *drive = to_ide_device(dev); | |
761 | ide_driver_t *drv = to_ide_driver(dev->driver); | |
762 | ||
763 | if (drv->remove) | |
764 | drv->remove(drive); | |
765 | ||
766 | return 0; | |
767 | } | |
768 | ||
769 | static void generic_ide_shutdown(struct device *dev) | |
770 | { | |
771 | ide_drive_t *drive = to_ide_device(dev); | |
772 | ide_driver_t *drv = to_ide_driver(dev->driver); | |
773 | ||
774 | if (dev->driver && drv->shutdown) | |
775 | drv->shutdown(drive); | |
776 | } | |
777 | ||
1da177e4 LT |
778 | struct bus_type ide_bus_type = { |
779 | .name = "ide", | |
8604affd | 780 | .match = ide_bus_match, |
263756ec | 781 | .uevent = ide_uevent, |
4031bbe4 RK |
782 | .probe = generic_ide_probe, |
783 | .remove = generic_ide_remove, | |
784 | .shutdown = generic_ide_shutdown, | |
263756ec | 785 | .dev_attrs = ide_dev_attrs, |
1da177e4 LT |
786 | .suspend = generic_ide_suspend, |
787 | .resume = generic_ide_resume, | |
788 | }; | |
789 | ||
8604affd BZ |
790 | EXPORT_SYMBOL_GPL(ide_bus_type); |
791 | ||
ebae41a5 BZ |
792 | int ide_vlb_clk; |
793 | EXPORT_SYMBOL_GPL(ide_vlb_clk); | |
794 | ||
795 | module_param_named(vlb_clock, ide_vlb_clk, int, 0); | |
796 | MODULE_PARM_DESC(vlb_clock, "VLB clock frequency (in MHz)"); | |
797 | ||
798 | int ide_pci_clk; | |
799 | EXPORT_SYMBOL_GPL(ide_pci_clk); | |
800 | ||
801 | module_param_named(pci_clock, ide_pci_clk, int, 0); | |
802 | MODULE_PARM_DESC(pci_clock, "PCI bus clock frequency (in MHz)"); | |
803 | ||
6e87543a BZ |
804 | static int ide_set_dev_param_mask(const char *s, struct kernel_param *kp) |
805 | { | |
806 | int a, b, i, j = 1; | |
807 | unsigned int *dev_param_mask = (unsigned int *)kp->arg; | |
808 | ||
809 | if (sscanf(s, "%d.%d:%d", &a, &b, &j) != 3 && | |
810 | sscanf(s, "%d.%d", &a, &b) != 2) | |
811 | return -EINVAL; | |
812 | ||
813 | i = a * MAX_DRIVES + b; | |
814 | ||
815 | if (i >= MAX_HWIFS * MAX_DRIVES || j < 0 || j > 1) | |
816 | return -EINVAL; | |
817 | ||
818 | if (j) | |
819 | *dev_param_mask |= (1 << i); | |
820 | else | |
821 | *dev_param_mask &= (1 << i); | |
822 | ||
823 | return 0; | |
824 | } | |
825 | ||
826 | static unsigned int ide_nodma; | |
827 | ||
828 | module_param_call(nodma, ide_set_dev_param_mask, NULL, &ide_nodma, 0); | |
829 | MODULE_PARM_DESC(nodma, "disallow DMA for a device"); | |
830 | ||
831 | static unsigned int ide_noflush; | |
832 | ||
833 | module_param_call(noflush, ide_set_dev_param_mask, NULL, &ide_noflush, 0); | |
834 | MODULE_PARM_DESC(noflush, "disable flush requests for a device"); | |
835 | ||
836 | static unsigned int ide_noprobe; | |
837 | ||
838 | module_param_call(noprobe, ide_set_dev_param_mask, NULL, &ide_noprobe, 0); | |
839 | MODULE_PARM_DESC(noprobe, "skip probing for a device"); | |
840 | ||
841 | static unsigned int ide_nowerr; | |
842 | ||
843 | module_param_call(nowerr, ide_set_dev_param_mask, NULL, &ide_nowerr, 0); | |
844 | MODULE_PARM_DESC(nowerr, "ignore the WRERR_STAT bit for a device"); | |
845 | ||
4706a7e0 BZ |
846 | static unsigned int ide_cdroms; |
847 | ||
848 | module_param_call(cdrom, ide_set_dev_param_mask, NULL, &ide_cdroms, 0); | |
849 | MODULE_PARM_DESC(cdrom, "force device as a CD-ROM"); | |
850 | ||
851 | struct chs_geom { | |
852 | unsigned int cyl; | |
853 | u8 head; | |
854 | u8 sect; | |
855 | }; | |
856 | ||
857 | static unsigned int ide_disks; | |
858 | static struct chs_geom ide_disks_chs[MAX_HWIFS * MAX_DRIVES]; | |
859 | ||
860 | static int ide_set_disk_chs(const char *str, struct kernel_param *kp) | |
861 | { | |
862 | int a, b, c = 0, h = 0, s = 0, i, j = 1; | |
863 | ||
864 | if (sscanf(str, "%d.%d:%d,%d,%d", &a, &b, &c, &h, &s) != 5 && | |
865 | sscanf(str, "%d.%d:%d", &a, &b, &j) != 3) | |
866 | return -EINVAL; | |
867 | ||
868 | i = a * MAX_DRIVES + b; | |
869 | ||
870 | if (i >= MAX_HWIFS * MAX_DRIVES || j < 0 || j > 1) | |
871 | return -EINVAL; | |
872 | ||
873 | if (c > INT_MAX || h > 255 || s > 255) | |
874 | return -EINVAL; | |
875 | ||
876 | if (j) | |
877 | ide_disks |= (1 << i); | |
878 | else | |
879 | ide_disks &= (1 << i); | |
880 | ||
881 | ide_disks_chs[i].cyl = c; | |
882 | ide_disks_chs[i].head = h; | |
883 | ide_disks_chs[i].sect = s; | |
884 | ||
885 | return 0; | |
886 | } | |
887 | ||
888 | module_param_call(chs, ide_set_disk_chs, NULL, NULL, 0); | |
889 | MODULE_PARM_DESC(chs, "force device as a disk (using CHS)"); | |
890 | ||
6e87543a BZ |
891 | static void ide_dev_apply_params(ide_drive_t *drive) |
892 | { | |
893 | int i = drive->hwif->index * MAX_DRIVES + drive->select.b.unit; | |
894 | ||
895 | if (ide_nodma & (1 << i)) { | |
896 | printk(KERN_INFO "ide: disallowing DMA for %s\n", drive->name); | |
897 | drive->nodma = 1; | |
898 | } | |
899 | if (ide_noflush & (1 << i)) { | |
900 | printk(KERN_INFO "ide: disabling flush requests for %s\n", | |
901 | drive->name); | |
902 | drive->noflush = 1; | |
903 | } | |
904 | if (ide_noprobe & (1 << i)) { | |
905 | printk(KERN_INFO "ide: skipping probe for %s\n", drive->name); | |
906 | drive->noprobe = 1; | |
907 | } | |
908 | if (ide_nowerr & (1 << i)) { | |
909 | printk(KERN_INFO "ide: ignoring the WRERR_STAT bit for %s\n", | |
910 | drive->name); | |
911 | drive->bad_wstat = BAD_R_STAT; | |
912 | } | |
4706a7e0 BZ |
913 | if (ide_cdroms & (1 << i)) { |
914 | printk(KERN_INFO "ide: forcing %s as a CD-ROM\n", drive->name); | |
915 | drive->present = 1; | |
916 | drive->media = ide_cdrom; | |
917 | /* an ATAPI device ignores DRDY */ | |
918 | drive->ready_stat = 0; | |
919 | } | |
920 | if (ide_disks & (1 << i)) { | |
921 | drive->cyl = drive->bios_cyl = ide_disks_chs[i].cyl; | |
922 | drive->head = drive->bios_head = ide_disks_chs[i].head; | |
923 | drive->sect = drive->bios_sect = ide_disks_chs[i].sect; | |
924 | drive->forced_geom = 1; | |
925 | printk(KERN_INFO "ide: forcing %s as a disk (%d/%d/%d)\n", | |
926 | drive->name, | |
927 | drive->cyl, drive->head, drive->sect); | |
928 | drive->present = 1; | |
929 | drive->media = ide_disk; | |
930 | drive->ready_stat = READY_STAT; | |
931 | } | |
6e87543a BZ |
932 | } |
933 | ||
9fd91d95 BZ |
934 | static unsigned int ide_ignore_cable; |
935 | ||
936 | static int ide_set_ignore_cable(const char *s, struct kernel_param *kp) | |
937 | { | |
938 | int i, j = 1; | |
939 | ||
940 | if (sscanf(s, "%d:%d", &i, &j) != 2 && sscanf(s, "%d", &i) != 1) | |
941 | return -EINVAL; | |
942 | ||
943 | if (i >= MAX_HWIFS || j < 0 || j > 1) | |
944 | return -EINVAL; | |
945 | ||
946 | if (j) | |
947 | ide_ignore_cable |= (1 << i); | |
948 | else | |
949 | ide_ignore_cable &= (1 << i); | |
950 | ||
951 | return 0; | |
952 | } | |
953 | ||
954 | module_param_call(ignore_cable, ide_set_ignore_cable, NULL, NULL, 0); | |
955 | MODULE_PARM_DESC(ignore_cable, "ignore cable detection"); | |
956 | ||
957 | void ide_port_apply_params(ide_hwif_t *hwif) | |
958 | { | |
6e87543a BZ |
959 | int i; |
960 | ||
9fd91d95 BZ |
961 | if (ide_ignore_cable & (1 << hwif->index)) { |
962 | printk(KERN_INFO "ide: ignoring cable detection for %s\n", | |
963 | hwif->name); | |
964 | hwif->cbl = ATA_CBL_PATA40_SHORT; | |
965 | } | |
6e87543a BZ |
966 | |
967 | for (i = 0; i < MAX_DRIVES; i++) | |
968 | ide_dev_apply_params(&hwif->drives[i]); | |
9fd91d95 BZ |
969 | } |
970 | ||
1da177e4 LT |
971 | /* |
972 | * This is gets invoked once during initialization, to set *everything* up | |
973 | */ | |
974 | static int __init ide_init(void) | |
975 | { | |
349ae23f RD |
976 | int ret; |
977 | ||
eba8ff94 | 978 | printk(KERN_INFO "Uniform Multi-Platform E-IDE driver\n"); |
537f06c5 | 979 | |
349ae23f RD |
980 | ret = bus_register(&ide_bus_type); |
981 | if (ret < 0) { | |
982 | printk(KERN_WARNING "IDE: bus_register error: %d\n", ret); | |
983 | return ret; | |
984 | } | |
1da177e4 | 985 | |
f74c9141 BZ |
986 | ide_port_class = class_create(THIS_MODULE, "ide_port"); |
987 | if (IS_ERR(ide_port_class)) { | |
988 | ret = PTR_ERR(ide_port_class); | |
989 | goto out_port_class; | |
990 | } | |
f74c9141 | 991 | |
5cbf79cd | 992 | proc_ide_create(); |
1da177e4 | 993 | |
1da177e4 | 994 | return 0; |
f74c9141 BZ |
995 | |
996 | out_port_class: | |
997 | bus_unregister(&ide_bus_type); | |
998 | ||
999 | return ret; | |
1da177e4 LT |
1000 | } |
1001 | ||
931ee0dc | 1002 | static void __exit ide_exit(void) |
1da177e4 | 1003 | { |
1da177e4 | 1004 | proc_ide_destroy(); |
1da177e4 | 1005 | |
f74c9141 BZ |
1006 | class_destroy(ide_port_class); |
1007 | ||
1da177e4 LT |
1008 | bus_unregister(&ide_bus_type); |
1009 | } | |
1010 | ||
1da177e4 | 1011 | module_init(ide_init); |
931ee0dc | 1012 | module_exit(ide_exit); |
1da177e4 | 1013 | |
931ee0dc | 1014 | MODULE_LICENSE("GPL"); |