blob: 6e85bee0bef7c85beda19721ff916d3fb3dcc121 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001#include <linux/module.h>
2#include <linux/types.h>
3#include <linux/string.h>
4#include <linux/kernel.h>
5#include <linux/timer.h>
6#include <linux/mm.h>
7#include <linux/interrupt.h>
8#include <linux/major.h>
9#include <linux/errno.h>
10#include <linux/genhd.h>
11#include <linux/blkpg.h>
12#include <linux/slab.h>
13#include <linux/pci.h>
14#include <linux/delay.h>
15#include <linux/hdreg.h>
16#include <linux/ide.h>
17#include <linux/bitops.h>
18
19#include <asm/byteorder.h>
20#include <asm/irq.h>
21#include <asm/uaccess.h>
22#include <asm/io.h>
23
24/*
25 * IDE library routines. These are plug in code that most
26 * drivers can use but occasionally may be weird enough
27 * to want to do their own thing with
28 *
29 * Add common non I/O op stuff here. Make sure it has proper
30 * kernel-doc function headers or your patch will be rejected
31 */
32
33
34/**
35 * ide_xfer_verbose - return IDE mode names
36 * @xfer_rate: rate to name
37 *
38 * Returns a constant string giving the name of the mode
39 * requested.
40 */
41
42char *ide_xfer_verbose (u8 xfer_rate)
43{
44 switch(xfer_rate) {
45 case XFER_UDMA_7: return("UDMA 7");
46 case XFER_UDMA_6: return("UDMA 6");
47 case XFER_UDMA_5: return("UDMA 5");
48 case XFER_UDMA_4: return("UDMA 4");
49 case XFER_UDMA_3: return("UDMA 3");
50 case XFER_UDMA_2: return("UDMA 2");
51 case XFER_UDMA_1: return("UDMA 1");
52 case XFER_UDMA_0: return("UDMA 0");
53 case XFER_MW_DMA_2: return("MW DMA 2");
54 case XFER_MW_DMA_1: return("MW DMA 1");
55 case XFER_MW_DMA_0: return("MW DMA 0");
56 case XFER_SW_DMA_2: return("SW DMA 2");
57 case XFER_SW_DMA_1: return("SW DMA 1");
58 case XFER_SW_DMA_0: return("SW DMA 0");
59 case XFER_PIO_4: return("PIO 4");
60 case XFER_PIO_3: return("PIO 3");
61 case XFER_PIO_2: return("PIO 2");
62 case XFER_PIO_1: return("PIO 1");
63 case XFER_PIO_0: return("PIO 0");
64 case XFER_PIO_SLOW: return("PIO SLOW");
65 default: return("XFER ERROR");
66 }
67}
68
69EXPORT_SYMBOL(ide_xfer_verbose);
70
71/**
Bartlomiej Zolnierkiewicz2d5eaa62007-05-10 00:01:08 +020072 * ide_rate_filter - filter transfer mode
73 * @drive: IDE device
Linus Torvalds1da177e2005-04-16 15:20:36 -070074 * @speed: desired speed
75 *
Bartlomiej Zolnierkiewicz2d5eaa62007-05-10 00:01:08 +020076 * Given the available transfer modes this function returns
Linus Torvalds1da177e2005-04-16 15:20:36 -070077 * the best available speed at or below the speed requested.
Bartlomiej Zolnierkiewicz2d5eaa62007-05-10 00:01:08 +020078 *
79 * FIXME: filter also PIO/SWDMA/MWDMA modes
Linus Torvalds1da177e2005-04-16 15:20:36 -070080 */
81
Bartlomiej Zolnierkiewicz2d5eaa62007-05-10 00:01:08 +020082u8 ide_rate_filter(ide_drive_t *drive, u8 speed)
Linus Torvalds1da177e2005-04-16 15:20:36 -070083{
84#ifdef CONFIG_BLK_DEV_IDEDMA
Bartlomiej Zolnierkiewicz2d5eaa62007-05-10 00:01:08 +020085 ide_hwif_t *hwif = drive->hwif;
86 u8 mask = hwif->ultra_mask, mode = XFER_MW_DMA_2;
87
88 if (hwif->udma_filter)
89 mask = hwif->udma_filter(drive);
90
Bartlomiej Zolnierkiewicz7f8f48a2007-05-10 00:01:10 +020091 /*
92 * TODO: speed > XFER_UDMA_2 extra check is needed to avoid false
93 * cable warning from eighty_ninty_three(), moving ide_rate_filter()
94 * calls from ->speedproc to core code will make this hack go away
95 */
96 if (speed > XFER_UDMA_2) {
97 if ((mask & 0x78) && (eighty_ninty_three(drive) == 0))
98 mask &= 0x07;
99 }
Bartlomiej Zolnierkiewicz2d5eaa62007-05-10 00:01:08 +0200100
101 if (mask)
102 mode = fls(mask) - 1 + XFER_UDMA_0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700103
104// printk("%s: mode 0x%02x, speed 0x%02x\n", __FUNCTION__, mode, speed);
105
Bartlomiej Zolnierkiewicz2d5eaa62007-05-10 00:01:08 +0200106 return min(speed, mode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700107#else /* !CONFIG_BLK_DEV_IDEDMA */
108 return min(speed, (u8)XFER_PIO_4);
109#endif /* CONFIG_BLK_DEV_IDEDMA */
110}
111
112EXPORT_SYMBOL(ide_rate_filter);
113
Bartlomiej Zolnierkiewicz7569e8d2007-02-17 02:40:25 +0100114int ide_use_fast_pio(ide_drive_t *drive)
115{
116 struct hd_driveid *id = drive->id;
117
118 if ((id->capability & 1) && drive->autodma)
119 return 1;
120
121 if ((id->capability & 8) || (id->field_valid & 2))
122 return 1;
123
124 return 0;
125}
126
127EXPORT_SYMBOL_GPL(ide_use_fast_pio);
128
Linus Torvalds1da177e2005-04-16 15:20:36 -0700129/*
130 * Standard (generic) timings for PIO modes, from ATA2 specification.
131 * These timings are for access to the IDE data port register *only*.
132 * Some drives may specify a mode, while also specifying a different
133 * value for cycle_time (from drive identification data).
134 */
135const ide_pio_timings_t ide_pio_timings[6] = {
136 { 70, 165, 600 }, /* PIO Mode 0 */
137 { 50, 125, 383 }, /* PIO Mode 1 */
138 { 30, 100, 240 }, /* PIO Mode 2 */
139 { 30, 80, 180 }, /* PIO Mode 3 with IORDY */
140 { 25, 70, 120 }, /* PIO Mode 4 with IORDY */
141 { 20, 50, 100 } /* PIO Mode 5 with IORDY (nonstandard) */
142};
143
144EXPORT_SYMBOL_GPL(ide_pio_timings);
145
146/*
147 * Shared data/functions for determining best PIO mode for an IDE drive.
148 * Most of this stuff originally lived in cmd640.c, and changes to the
149 * ide_pio_blacklist[] table should be made with EXTREME CAUTION to avoid
150 * breaking the fragile cmd640.c support.
151 */
152
153/*
154 * Black list. Some drives incorrectly report their maximal PIO mode,
155 * at least in respect to CMD640. Here we keep info on some known drives.
156 */
157static struct ide_pio_info {
158 const char *name;
159 int pio;
160} ide_pio_blacklist [] = {
161/* { "Conner Peripherals 1275MB - CFS1275A", 4 }, */
162 { "Conner Peripherals 540MB - CFS540A", 3 },
163
164 { "WDC AC2700", 3 },
165 { "WDC AC2540", 3 },
166 { "WDC AC2420", 3 },
167 { "WDC AC2340", 3 },
168 { "WDC AC2250", 0 },
169 { "WDC AC2200", 0 },
170 { "WDC AC21200", 4 },
171 { "WDC AC2120", 0 },
172 { "WDC AC2850", 3 },
173 { "WDC AC1270", 3 },
174 { "WDC AC1170", 1 },
175 { "WDC AC1210", 1 },
176 { "WDC AC280", 0 },
177/* { "WDC AC21000", 4 }, */
178 { "WDC AC31000", 3 },
179 { "WDC AC31200", 3 },
180/* { "WDC AC31600", 4 }, */
181
182 { "Maxtor 7131 AT", 1 },
183 { "Maxtor 7171 AT", 1 },
184 { "Maxtor 7213 AT", 1 },
185 { "Maxtor 7245 AT", 1 },
186 { "Maxtor 7345 AT", 1 },
187 { "Maxtor 7546 AT", 3 },
188 { "Maxtor 7540 AV", 3 },
189
190 { "SAMSUNG SHD-3121A", 1 },
191 { "SAMSUNG SHD-3122A", 1 },
192 { "SAMSUNG SHD-3172A", 1 },
193
194/* { "ST51080A", 4 },
195 * { "ST51270A", 4 },
196 * { "ST31220A", 4 },
197 * { "ST31640A", 4 },
198 * { "ST32140A", 4 },
199 * { "ST3780A", 4 },
200 */
201 { "ST5660A", 3 },
202 { "ST3660A", 3 },
203 { "ST3630A", 3 },
204 { "ST3655A", 3 },
205 { "ST3391A", 3 },
206 { "ST3390A", 1 },
207 { "ST3600A", 1 },
208 { "ST3290A", 0 },
209 { "ST3144A", 0 },
210 { "ST3491A", 1 }, /* reports 3, should be 1 or 2 (depending on */
211 /* drive) according to Seagates FIND-ATA program */
212
213 { "QUANTUM ELS127A", 0 },
214 { "QUANTUM ELS170A", 0 },
215 { "QUANTUM LPS240A", 0 },
216 { "QUANTUM LPS210A", 3 },
217 { "QUANTUM LPS270A", 3 },
218 { "QUANTUM LPS365A", 3 },
219 { "QUANTUM LPS540A", 3 },
220 { "QUANTUM LIGHTNING 540A", 3 },
221 { "QUANTUM LIGHTNING 730A", 3 },
222
223 { "QUANTUM FIREBALL_540", 3 }, /* Older Quantum Fireballs don't work */
224 { "QUANTUM FIREBALL_640", 3 },
225 { "QUANTUM FIREBALL_1080", 3 },
226 { "QUANTUM FIREBALL_1280", 3 },
227 { NULL, 0 }
228};
229
230/**
231 * ide_scan_pio_blacklist - check for a blacklisted drive
232 * @model: Drive model string
233 *
234 * This routine searches the ide_pio_blacklist for an entry
235 * matching the start/whole of the supplied model name.
236 *
237 * Returns -1 if no match found.
238 * Otherwise returns the recommended PIO mode from ide_pio_blacklist[].
239 */
240
241static int ide_scan_pio_blacklist (char *model)
242{
243 struct ide_pio_info *p;
244
245 for (p = ide_pio_blacklist; p->name != NULL; p++) {
246 if (strncmp(p->name, model, strlen(p->name)) == 0)
247 return p->pio;
248 }
249 return -1;
250}
251
Bartlomiej Zolnierkiewicz7dd00082007-07-20 01:11:56 +0200252unsigned int ide_pio_cycle_time(ide_drive_t *drive, u8 pio)
253{
254 struct hd_driveid *id = drive->id;
255 int cycle_time = 0;
256
257 if (id->field_valid & 2) {
258 if (id->capability & 8)
259 cycle_time = id->eide_pio_iordy;
260 else
261 cycle_time = id->eide_pio;
262 }
263
264 /* conservative "downgrade" for all pre-ATA2 drives */
265 if (pio < 3) {
266 if (cycle_time && cycle_time < ide_pio_timings[pio].cycle_time)
267 cycle_time = 0; /* use standard timing */
268 }
269
270 return cycle_time ? cycle_time : ide_pio_timings[pio].cycle_time;
271}
272
273EXPORT_SYMBOL_GPL(ide_pio_cycle_time);
274
Linus Torvalds1da177e2005-04-16 15:20:36 -0700275/**
276 * ide_get_best_pio_mode - get PIO mode from drive
Sergei Shtylyov81d368e2007-03-03 17:48:53 +0100277 * @drive: drive to consider
Linus Torvalds1da177e2005-04-16 15:20:36 -0700278 * @mode_wanted: preferred mode
Sergei Shtylyov81d368e2007-03-03 17:48:53 +0100279 * @max_mode: highest allowed mode
280 * @d: PIO data
Linus Torvalds1da177e2005-04-16 15:20:36 -0700281 *
282 * This routine returns the recommended PIO settings for a given drive,
283 * based on the drive->id information and the ide_pio_blacklist[].
Linus Torvalds1da177e2005-04-16 15:20:36 -0700284 *
Sergei Shtylyov81d368e2007-03-03 17:48:53 +0100285 * Drive PIO mode is auto-selected if 255 is passed as mode_wanted.
286 * This is used by most chipset support modules when "auto-tuning".
Linus Torvalds1da177e2005-04-16 15:20:36 -0700287 */
288
289u8 ide_get_best_pio_mode (ide_drive_t *drive, u8 mode_wanted, u8 max_mode, ide_pio_data_t *d)
290{
291 int pio_mode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700292 struct hd_driveid* id = drive->id;
293 int overridden = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700294
295 if (mode_wanted != 255) {
296 pio_mode = mode_wanted;
297 } else if (!drive->id) {
298 pio_mode = 0;
299 } else if ((pio_mode = ide_scan_pio_blacklist(id->model)) != -1) {
Bartlomiej Zolnierkiewicz342cdb62007-07-20 01:11:55 +0200300 printk(KERN_INFO "%s: is on PIO blacklist\n", drive->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700301 } else {
302 pio_mode = id->tPIO;
303 if (pio_mode > 2) { /* 2 is maximum allowed tPIO value */
304 pio_mode = 2;
305 overridden = 1;
306 }
307 if (id->field_valid & 2) { /* drive implements ATA2? */
Bartlomiej Zolnierkiewicz22298332007-07-20 01:11:55 +0200308 if (id->capability & 8) { /* IORDY supported? */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700309 if (id->eide_pio_modes & 7) {
310 overridden = 0;
311 if (id->eide_pio_modes & 4)
312 pio_mode = 5;
313 else if (id->eide_pio_modes & 2)
314 pio_mode = 4;
315 else
316 pio_mode = 3;
317 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700318 }
319 }
320
Bartlomiej Zolnierkiewicz342cdb62007-07-20 01:11:55 +0200321 if (overridden)
322 printk(KERN_INFO "%s: tPIO > 2, assuming tPIO = 2\n",
323 drive->name);
324
Linus Torvalds1da177e2005-04-16 15:20:36 -0700325 /*
326 * Conservative "downgrade" for all pre-ATA2 drives
327 */
328 if (pio_mode && pio_mode < 4) {
329 pio_mode--;
Bartlomiej Zolnierkiewicz342cdb62007-07-20 01:11:55 +0200330 printk(KERN_INFO "%s: applying conservative "
331 "PIO \"downgrade\"\n", drive->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700332 }
333 }
Bartlomiej Zolnierkiewicz7dd00082007-07-20 01:11:56 +0200334
335 if (pio_mode > max_mode)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700336 pio_mode = max_mode;
Bartlomiej Zolnierkiewicz7dd00082007-07-20 01:11:56 +0200337
338 if (d)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700339 d->pio_mode = pio_mode;
Bartlomiej Zolnierkiewicz7dd00082007-07-20 01:11:56 +0200340
Linus Torvalds1da177e2005-04-16 15:20:36 -0700341 return pio_mode;
342}
343
344EXPORT_SYMBOL_GPL(ide_get_best_pio_mode);
345
346/**
347 * ide_toggle_bounce - handle bounce buffering
348 * @drive: drive to update
349 * @on: on/off boolean
350 *
351 * Enable or disable bounce buffering for the device. Drives move
352 * between PIO and DMA and that changes the rules we need.
353 */
354
355void ide_toggle_bounce(ide_drive_t *drive, int on)
356{
357 u64 addr = BLK_BOUNCE_HIGH; /* dma64_addr_t */
358
James Bottomley65931782005-11-18 23:13:33 +0100359 if (!PCI_DMA_BUS_IS_PHYS) {
360 addr = BLK_BOUNCE_ANY;
361 } else if (on && drive->media == ide_disk) {
362 if (HWIF(drive)->pci_dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700363 addr = HWIF(drive)->pci_dev->dma_mask;
364 }
365
366 if (drive->queue)
367 blk_queue_bounce_limit(drive->queue, addr);
368}
369
370/**
371 * ide_set_xfer_rate - set transfer rate
372 * @drive: drive to set
373 * @speed: speed to attempt to set
374 *
375 * General helper for setting the speed of an IDE device. This
376 * function knows about user enforced limits from the configuration
377 * which speedproc() does not. High level drivers should never
378 * invoke speedproc() directly.
379 */
380
381int ide_set_xfer_rate(ide_drive_t *drive, u8 rate)
382{
383#ifndef CONFIG_BLK_DEV_IDEDMA
384 rate = min(rate, (u8) XFER_PIO_4);
385#endif
386 if(HWIF(drive)->speedproc)
387 return HWIF(drive)->speedproc(drive, rate);
388 else
389 return -1;
390}
391
Linus Torvalds1da177e2005-04-16 15:20:36 -0700392static void ide_dump_opcode(ide_drive_t *drive)
393{
394 struct request *rq;
395 u8 opcode = 0;
396 int found = 0;
397
398 spin_lock(&ide_lock);
399 rq = NULL;
400 if (HWGROUP(drive))
401 rq = HWGROUP(drive)->rq;
402 spin_unlock(&ide_lock);
403 if (!rq)
404 return;
Jens Axboe4aff5e22006-08-10 08:44:47 +0200405 if (rq->cmd_type == REQ_TYPE_ATA_CMD ||
406 rq->cmd_type == REQ_TYPE_ATA_TASK) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700407 char *args = rq->buffer;
408 if (args) {
409 opcode = args[0];
410 found = 1;
411 }
Jens Axboe4aff5e22006-08-10 08:44:47 +0200412 } else if (rq->cmd_type == REQ_TYPE_ATA_TASKFILE) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700413 ide_task_t *args = rq->special;
414 if (args) {
415 task_struct_t *tf = (task_struct_t *) args->tfRegister;
416 opcode = tf->command;
417 found = 1;
418 }
419 }
420
421 printk("ide: failed opcode was: ");
422 if (!found)
423 printk("unknown\n");
424 else
425 printk("0x%02x\n", opcode);
426}
427
428static u8 ide_dump_ata_status(ide_drive_t *drive, const char *msg, u8 stat)
429{
430 ide_hwif_t *hwif = HWIF(drive);
431 unsigned long flags;
432 u8 err = 0;
433
Ingo Molnar3d1c1cc2006-06-26 00:26:17 -0700434 local_irq_save(flags);
Denis Vlasenko13bbbf22005-07-03 17:09:13 +0200435 printk("%s: %s: status=0x%02x { ", drive->name, msg, stat);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700436 if (stat & BUSY_STAT)
437 printk("Busy ");
438 else {
439 if (stat & READY_STAT) printk("DriveReady ");
440 if (stat & WRERR_STAT) printk("DeviceFault ");
441 if (stat & SEEK_STAT) printk("SeekComplete ");
442 if (stat & DRQ_STAT) printk("DataRequest ");
443 if (stat & ECC_STAT) printk("CorrectedError ");
444 if (stat & INDEX_STAT) printk("Index ");
445 if (stat & ERR_STAT) printk("Error ");
446 }
Denis Vlasenko13bbbf22005-07-03 17:09:13 +0200447 printk("}\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700448 if ((stat & (BUSY_STAT|ERR_STAT)) == ERR_STAT) {
449 err = hwif->INB(IDE_ERROR_REG);
Denis Vlasenko13bbbf22005-07-03 17:09:13 +0200450 printk("%s: %s: error=0x%02x { ", drive->name, msg, err);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700451 if (err & ABRT_ERR) printk("DriveStatusError ");
452 if (err & ICRC_ERR)
Denis Vlasenko13bbbf22005-07-03 17:09:13 +0200453 printk((err & ABRT_ERR) ? "BadCRC " : "BadSector ");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700454 if (err & ECC_ERR) printk("UncorrectableError ");
455 if (err & ID_ERR) printk("SectorIdNotFound ");
456 if (err & TRK0_ERR) printk("TrackZeroNotFound ");
457 if (err & MARK_ERR) printk("AddrMarkNotFound ");
458 printk("}");
459 if ((err & (BBD_ERR | ABRT_ERR)) == BBD_ERR ||
460 (err & (ECC_ERR|ID_ERR|MARK_ERR))) {
461 if (drive->addressing == 1) {
462 __u64 sectors = 0;
463 u32 low = 0, high = 0;
464 low = ide_read_24(drive);
465 hwif->OUTB(drive->ctl|0x80, IDE_CONTROL_REG);
466 high = ide_read_24(drive);
467 sectors = ((__u64)high << 24) | low;
468 printk(", LBAsect=%llu, high=%d, low=%d",
469 (unsigned long long) sectors,
470 high, low);
471 } else {
472 u8 cur = hwif->INB(IDE_SELECT_REG);
473 if (cur & 0x40) { /* using LBA? */
474 printk(", LBAsect=%ld", (unsigned long)
475 ((cur&0xf)<<24)
476 |(hwif->INB(IDE_HCYL_REG)<<16)
477 |(hwif->INB(IDE_LCYL_REG)<<8)
478 | hwif->INB(IDE_SECTOR_REG));
479 } else {
480 printk(", CHS=%d/%d/%d",
481 (hwif->INB(IDE_HCYL_REG)<<8) +
482 hwif->INB(IDE_LCYL_REG),
483 cur & 0xf,
484 hwif->INB(IDE_SECTOR_REG));
485 }
486 }
487 if (HWGROUP(drive) && HWGROUP(drive)->rq)
488 printk(", sector=%llu",
489 (unsigned long long)HWGROUP(drive)->rq->sector);
490 }
Denis Vlasenko13bbbf22005-07-03 17:09:13 +0200491 printk("\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700492 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700493 ide_dump_opcode(drive);
494 local_irq_restore(flags);
495 return err;
496}
497
498/**
499 * ide_dump_atapi_status - print human readable atapi status
500 * @drive: drive that status applies to
501 * @msg: text message to print
502 * @stat: status byte to decode
503 *
504 * Error reporting, in human readable form (luxurious, but a memory hog).
505 */
506
507static u8 ide_dump_atapi_status(ide_drive_t *drive, const char *msg, u8 stat)
508{
509 unsigned long flags;
510
511 atapi_status_t status;
512 atapi_error_t error;
513
514 status.all = stat;
515 error.all = 0;
Ingo Molnar3d1c1cc2006-06-26 00:26:17 -0700516 local_irq_save(flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700517 printk("%s: %s: status=0x%02x { ", drive->name, msg, stat);
518 if (status.b.bsy)
519 printk("Busy ");
520 else {
521 if (status.b.drdy) printk("DriveReady ");
522 if (status.b.df) printk("DeviceFault ");
523 if (status.b.dsc) printk("SeekComplete ");
524 if (status.b.drq) printk("DataRequest ");
525 if (status.b.corr) printk("CorrectedError ");
526 if (status.b.idx) printk("Index ");
527 if (status.b.check) printk("Error ");
528 }
529 printk("}\n");
530 if (status.b.check && !status.b.bsy) {
531 error.all = HWIF(drive)->INB(IDE_ERROR_REG);
532 printk("%s: %s: error=0x%02x { ", drive->name, msg, error.all);
533 if (error.b.ili) printk("IllegalLengthIndication ");
534 if (error.b.eom) printk("EndOfMedia ");
535 if (error.b.abrt) printk("AbortedCommand ");
536 if (error.b.mcr) printk("MediaChangeRequested ");
537 if (error.b.sense_key) printk("LastFailedSense=0x%02x ",
538 error.b.sense_key);
539 printk("}\n");
540 }
541 ide_dump_opcode(drive);
542 local_irq_restore(flags);
543 return error.all;
544}
545
546/**
547 * ide_dump_status - translate ATA/ATAPI error
548 * @drive: drive the error occured on
549 * @msg: information string
550 * @stat: status byte
551 *
552 * Error reporting, in human readable form (luxurious, but a memory hog).
553 * Combines the drive name, message and status byte to provide a
554 * user understandable explanation of the device error.
555 */
556
557u8 ide_dump_status(ide_drive_t *drive, const char *msg, u8 stat)
558{
559 if (drive->media == ide_disk)
560 return ide_dump_ata_status(drive, msg, stat);
561 return ide_dump_atapi_status(drive, msg, stat);
562}
563
564EXPORT_SYMBOL(ide_dump_status);