1 #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 static const char *udma_str[] =
25 { "UDMA/16", "UDMA/25", "UDMA/33", "UDMA/44",
26 "UDMA/66", "UDMA/100", "UDMA/133", "UDMA7" };
27 static const char *mwdma_str[] =
28 { "MWDMA0", "MWDMA1", "MWDMA2" };
29 static const char *swdma_str[] =
30 { "SWDMA0", "SWDMA1", "SWDMA2" };
31 static const char *pio_str[] =
32 { "PIO0", "PIO1", "PIO2", "PIO3", "PIO4", "PIO5" };
33
34 /**
35 * ide_xfer_verbose - return IDE mode names
36 * @mode: transfer mode
37 *
38 * Returns a constant string giving the name of the mode
39 * requested.
40 */
41
42 const char *ide_xfer_verbose(u8 mode)
43 {
44 const char *s;
45 u8 i = mode & 0xf;
46
47 if (mode >= XFER_UDMA_0 && mode <= XFER_UDMA_7)
48 s = udma_str[i];
49 else if (mode >= XFER_MW_DMA_0 && mode <= XFER_MW_DMA_2)
50 s = mwdma_str[i];
51 else if (mode >= XFER_SW_DMA_0 && mode <= XFER_SW_DMA_2)
52 s = swdma_str[i];
53 else if (mode >= XFER_PIO_0 && mode <= XFER_PIO_5)
54 s = pio_str[i & 0x7];
55 else if (mode == XFER_PIO_SLOW)
56 s = "PIO SLOW";
57 else
58 s = "XFER ERROR";
59
60 return s;
61 }
62
63 EXPORT_SYMBOL(ide_xfer_verbose);
64
65 /**
66 * ide_rate_filter - filter transfer mode
67 * @drive: IDE device
68 * @speed: desired speed
69 *
70 * Given the available transfer modes this function returns
71 * the best available speed at or below the speed requested.
72 *
73 * TODO: check device PIO capabilities
74 */
75
76 static u8 ide_rate_filter(ide_drive_t *drive, u8 speed)
77 {
78 ide_hwif_t *hwif = drive->hwif;
79 u8 mode = ide_find_dma_mode(drive, speed);
80
81 if (mode == 0) {
82 if (hwif->pio_mask)
83 mode = fls(hwif->pio_mask) - 1 + XFER_PIO_0;
84 else
85 mode = XFER_PIO_4;
86 }
87
88 // printk("%s: mode 0x%02x, speed 0x%02x\n", __FUNCTION__, mode, speed);
89
90 return min(speed, mode);
91 }
92
93 /*
94 * Standard (generic) timings for PIO modes, from ATA2 specification.
95 * These timings are for access to the IDE data port register *only*.
96 * Some drives may specify a mode, while also specifying a different
97 * value for cycle_time (from drive identification data).
98 */
99 const ide_pio_timings_t ide_pio_timings[6] = {
100 { 70, 165, 600 }, /* PIO Mode 0 */
101 { 50, 125, 383 }, /* PIO Mode 1 */
102 { 30, 100, 240 }, /* PIO Mode 2 */
103 { 30, 80, 180 }, /* PIO Mode 3 with IORDY */
104 { 25, 70, 120 }, /* PIO Mode 4 with IORDY */
105 { 20, 50, 100 } /* PIO Mode 5 with IORDY (nonstandard) */
106 };
107
108 EXPORT_SYMBOL_GPL(ide_pio_timings);
109
110 /*
111 * Shared data/functions for determining best PIO mode for an IDE drive.
112 * Most of this stuff originally lived in cmd640.c, and changes to the
113 * ide_pio_blacklist[] table should be made with EXTREME CAUTION to avoid
114 * breaking the fragile cmd640.c support.
115 */
116
117 /*
118 * Black list. Some drives incorrectly report their maximal PIO mode,
119 * at least in respect to CMD640. Here we keep info on some known drives.
120 */
121 static struct ide_pio_info {
122 const char *name;
123 int pio;
124 } ide_pio_blacklist [] = {
125 { "Conner Peripherals 540MB - CFS540A", 3 },
126
127 { "WDC AC2700", 3 },
128 { "WDC AC2540", 3 },
129 { "WDC AC2420", 3 },
130 { "WDC AC2340", 3 },
131 { "WDC AC2250", 0 },
132 { "WDC AC2200", 0 },
133 { "WDC AC21200", 4 },
134 { "WDC AC2120", 0 },
135 { "WDC AC2850", 3 },
136 { "WDC AC1270", 3 },
137 { "WDC AC1170", 1 },
138 { "WDC AC1210", 1 },
139 { "WDC AC280", 0 },
140 { "WDC AC31000", 3 },
141 { "WDC AC31200", 3 },
142
143 { "Maxtor 7131 AT", 1 },
144 { "Maxtor 7171 AT", 1 },
145 { "Maxtor 7213 AT", 1 },
146 { "Maxtor 7245 AT", 1 },
147 { "Maxtor 7345 AT", 1 },
148 { "Maxtor 7546 AT", 3 },
149 { "Maxtor 7540 AV", 3 },
150
151 { "SAMSUNG SHD-3121A", 1 },
152 { "SAMSUNG SHD-3122A", 1 },
153 { "SAMSUNG SHD-3172A", 1 },
154
155 { "ST5660A", 3 },
156 { "ST3660A", 3 },
157 { "ST3630A", 3 },
158 { "ST3655A", 3 },
159 { "ST3391A", 3 },
160 { "ST3390A", 1 },
161 { "ST3600A", 1 },
162 { "ST3290A", 0 },
163 { "ST3144A", 0 },
164 { "ST3491A", 1 }, /* reports 3, should be 1 or 2 (depending on */
165 /* drive) according to Seagates FIND-ATA program */
166
167 { "QUANTUM ELS127A", 0 },
168 { "QUANTUM ELS170A", 0 },
169 { "QUANTUM LPS240A", 0 },
170 { "QUANTUM LPS210A", 3 },
171 { "QUANTUM LPS270A", 3 },
172 { "QUANTUM LPS365A", 3 },
173 { "QUANTUM LPS540A", 3 },
174 { "QUANTUM LIGHTNING 540A", 3 },
175 { "QUANTUM LIGHTNING 730A", 3 },
176
177 { "QUANTUM FIREBALL_540", 3 }, /* Older Quantum Fireballs don't work */
178 { "QUANTUM FIREBALL_640", 3 },
179 { "QUANTUM FIREBALL_1080", 3 },
180 { "QUANTUM FIREBALL_1280", 3 },
181 { NULL, 0 }
182 };
183
184 /**
185 * ide_scan_pio_blacklist - check for a blacklisted drive
186 * @model: Drive model string
187 *
188 * This routine searches the ide_pio_blacklist for an entry
189 * matching the start/whole of the supplied model name.
190 *
191 * Returns -1 if no match found.
192 * Otherwise returns the recommended PIO mode from ide_pio_blacklist[].
193 */
194
195 static int ide_scan_pio_blacklist (char *model)
196 {
197 struct ide_pio_info *p;
198
199 for (p = ide_pio_blacklist; p->name != NULL; p++) {
200 if (strncmp(p->name, model, strlen(p->name)) == 0)
201 return p->pio;
202 }
203 return -1;
204 }
205
206 unsigned int ide_pio_cycle_time(ide_drive_t *drive, u8 pio)
207 {
208 struct hd_driveid *id = drive->id;
209 int cycle_time = 0;
210
211 if (id->field_valid & 2) {
212 if (id->capability & 8)
213 cycle_time = id->eide_pio_iordy;
214 else
215 cycle_time = id->eide_pio;
216 }
217
218 /* conservative "downgrade" for all pre-ATA2 drives */
219 if (pio < 3) {
220 if (cycle_time && cycle_time < ide_pio_timings[pio].cycle_time)
221 cycle_time = 0; /* use standard timing */
222 }
223
224 return cycle_time ? cycle_time : ide_pio_timings[pio].cycle_time;
225 }
226
227 EXPORT_SYMBOL_GPL(ide_pio_cycle_time);
228
229 /**
230 * ide_get_best_pio_mode - get PIO mode from drive
231 * @drive: drive to consider
232 * @mode_wanted: preferred mode
233 * @max_mode: highest allowed mode
234 *
235 * This routine returns the recommended PIO settings for a given drive,
236 * based on the drive->id information and the ide_pio_blacklist[].
237 *
238 * Drive PIO mode is auto-selected if 255 is passed as mode_wanted.
239 * This is used by most chipset support modules when "auto-tuning".
240 */
241
242 u8 ide_get_best_pio_mode (ide_drive_t *drive, u8 mode_wanted, u8 max_mode)
243 {
244 int pio_mode;
245 struct hd_driveid* id = drive->id;
246 int overridden = 0;
247
248 if (mode_wanted != 255)
249 return min_t(u8, mode_wanted, max_mode);
250
251 if ((drive->hwif->host_flags & IDE_HFLAG_PIO_NO_BLACKLIST) == 0 &&
252 (pio_mode = ide_scan_pio_blacklist(id->model)) != -1) {
253 printk(KERN_INFO "%s: is on PIO blacklist\n", drive->name);
254 } else {
255 pio_mode = id->tPIO;
256 if (pio_mode > 2) { /* 2 is maximum allowed tPIO value */
257 pio_mode = 2;
258 overridden = 1;
259 }
260 if (id->field_valid & 2) { /* drive implements ATA2? */
261 if (id->capability & 8) { /* IORDY supported? */
262 if (id->eide_pio_modes & 7) {
263 overridden = 0;
264 if (id->eide_pio_modes & 4)
265 pio_mode = 5;
266 else if (id->eide_pio_modes & 2)
267 pio_mode = 4;
268 else
269 pio_mode = 3;
270 }
271 }
272 }
273
274 if (overridden)
275 printk(KERN_INFO "%s: tPIO > 2, assuming tPIO = 2\n",
276 drive->name);
277
278 /*
279 * Conservative "downgrade" for all pre-ATA2 drives
280 */
281 if ((drive->hwif->host_flags & IDE_HFLAG_PIO_NO_DOWNGRADE) == 0 &&
282 pio_mode && pio_mode < 4) {
283 pio_mode--;
284 printk(KERN_INFO "%s: applying conservative "
285 "PIO \"downgrade\"\n", drive->name);
286 }
287 }
288
289 if (pio_mode > max_mode)
290 pio_mode = max_mode;
291
292 return pio_mode;
293 }
294
295 EXPORT_SYMBOL_GPL(ide_get_best_pio_mode);
296
297 /* req_pio == "255" for auto-tune */
298 void ide_set_pio(ide_drive_t *drive, u8 req_pio)
299 {
300 ide_hwif_t *hwif = drive->hwif;
301 u8 host_pio, pio;
302
303 if (hwif->set_pio_mode == NULL)
304 return;
305
306 BUG_ON(hwif->pio_mask == 0x00);
307
308 host_pio = fls(hwif->pio_mask) - 1;
309
310 pio = ide_get_best_pio_mode(drive, req_pio, host_pio);
311
312 /*
313 * TODO:
314 * - report device max PIO mode
315 * - check req_pio != 255 against device max PIO mode
316 */
317 printk(KERN_DEBUG "%s: host max PIO%d wanted PIO%d%s selected PIO%d\n",
318 drive->name, host_pio, req_pio,
319 req_pio == 255 ? "(auto-tune)" : "", pio);
320
321 (void)ide_set_pio_mode(drive, XFER_PIO_0 + pio);
322 }
323
324 EXPORT_SYMBOL_GPL(ide_set_pio);
325
326 /**
327 * ide_toggle_bounce - handle bounce buffering
328 * @drive: drive to update
329 * @on: on/off boolean
330 *
331 * Enable or disable bounce buffering for the device. Drives move
332 * between PIO and DMA and that changes the rules we need.
333 */
334
335 void ide_toggle_bounce(ide_drive_t *drive, int on)
336 {
337 u64 addr = BLK_BOUNCE_HIGH; /* dma64_addr_t */
338
339 if (!PCI_DMA_BUS_IS_PHYS) {
340 addr = BLK_BOUNCE_ANY;
341 } else if (on && drive->media == ide_disk) {
342 struct device *dev = drive->hwif->dev;
343
344 if (dev && dev->dma_mask)
345 addr = *dev->dma_mask;
346 }
347
348 if (drive->queue)
349 blk_queue_bounce_limit(drive->queue, addr);
350 }
351
352 int ide_set_pio_mode(ide_drive_t *drive, const u8 mode)
353 {
354 ide_hwif_t *hwif = drive->hwif;
355
356 if (hwif->set_pio_mode == NULL)
357 return -1;
358
359 /*
360 * TODO: temporary hack for some legacy host drivers that didn't
361 * set transfer mode on the device in ->set_pio_mode method...
362 */
363 if (hwif->set_dma_mode == NULL) {
364 hwif->set_pio_mode(drive, mode - XFER_PIO_0);
365 return 0;
366 }
367
368 if (hwif->host_flags & IDE_HFLAG_POST_SET_MODE) {
369 if (ide_config_drive_speed(drive, mode))
370 return -1;
371 hwif->set_pio_mode(drive, mode - XFER_PIO_0);
372 return 0;
373 } else {
374 hwif->set_pio_mode(drive, mode - XFER_PIO_0);
375 return ide_config_drive_speed(drive, mode);
376 }
377 }
378
379 int ide_set_dma_mode(ide_drive_t *drive, const u8 mode)
380 {
381 ide_hwif_t *hwif = drive->hwif;
382
383 if (hwif->set_dma_mode == NULL)
384 return -1;
385
386 if (hwif->host_flags & IDE_HFLAG_POST_SET_MODE) {
387 if (ide_config_drive_speed(drive, mode))
388 return -1;
389 hwif->set_dma_mode(drive, mode);
390 return 0;
391 } else {
392 hwif->set_dma_mode(drive, mode);
393 return ide_config_drive_speed(drive, mode);
394 }
395 }
396
397 EXPORT_SYMBOL_GPL(ide_set_dma_mode);
398
399 /**
400 * ide_set_xfer_rate - set transfer rate
401 * @drive: drive to set
402 * @rate: speed to attempt to set
403 *
404 * General helper for setting the speed of an IDE device. This
405 * function knows about user enforced limits from the configuration
406 * which ->set_pio_mode/->set_dma_mode does not.
407 */
408
409 int ide_set_xfer_rate(ide_drive_t *drive, u8 rate)
410 {
411 ide_hwif_t *hwif = drive->hwif;
412
413 if (hwif->set_dma_mode == NULL)
414 return -1;
415
416 rate = ide_rate_filter(drive, rate);
417
418 if (rate >= XFER_PIO_0 && rate <= XFER_PIO_5)
419 return ide_set_pio_mode(drive, rate);
420
421 /*
422 * TODO: transfer modes 0x00-0x07 passed from the user-space are
423 * currently handled here which needs fixing (please note that such
424 * case could happen iff the transfer mode has already been set on
425 * the device by ide-proc.c::set_xfer_rate()).
426 */
427 if (rate < XFER_PIO_0) {
428 if (hwif->host_flags & IDE_HFLAG_ABUSE_SET_DMA_MODE)
429 return ide_set_dma_mode(drive, rate);
430 else
431 return ide_config_drive_speed(drive, rate);
432 }
433
434 return ide_set_dma_mode(drive, rate);
435 }
436
437 static void ide_dump_opcode(ide_drive_t *drive)
438 {
439 struct request *rq;
440 ide_task_t *task = NULL;
441
442 spin_lock(&ide_lock);
443 rq = NULL;
444 if (HWGROUP(drive))
445 rq = HWGROUP(drive)->rq;
446 spin_unlock(&ide_lock);
447 if (!rq)
448 return;
449
450 if (rq->cmd_type == REQ_TYPE_ATA_TASKFILE)
451 task = rq->special;
452
453 printk("ide: failed opcode was: ");
454 if (task == NULL)
455 printk(KERN_CONT "unknown\n");
456 else
457 printk(KERN_CONT "0x%02x\n", task->tf.command);
458 }
459
460 u64 ide_get_lba_addr(struct ide_taskfile *tf, int lba48)
461 {
462 u32 high, low;
463
464 if (lba48)
465 high = (tf->hob_lbah << 16) | (tf->hob_lbam << 8) |
466 tf->hob_lbal;
467 else
468 high = tf->device & 0xf;
469 low = (tf->lbah << 16) | (tf->lbam << 8) | tf->lbal;
470
471 return ((u64)high << 24) | low;
472 }
473 EXPORT_SYMBOL_GPL(ide_get_lba_addr);
474
475 static void ide_dump_sector(ide_drive_t *drive)
476 {
477 ide_task_t task;
478 struct ide_taskfile *tf = &task.tf;
479 int lba48 = (drive->addressing == 1) ? 1 : 0;
480
481 memset(&task, 0, sizeof(task));
482 if (lba48)
483 task.tf_flags = IDE_TFLAG_IN_LBA | IDE_TFLAG_IN_HOB_LBA |
484 IDE_TFLAG_LBA48;
485 else
486 task.tf_flags = IDE_TFLAG_IN_LBA | IDE_TFLAG_IN_DEVICE;
487
488 ide_tf_read(drive, &task);
489
490 if (lba48 || (tf->device & ATA_LBA))
491 printk(", LBAsect=%llu",
492 (unsigned long long)ide_get_lba_addr(tf, lba48));
493 else
494 printk(", CHS=%d/%d/%d", (tf->lbah << 8) + tf->lbam,
495 tf->device & 0xf, tf->lbal);
496 }
497
498 static void ide_dump_ata_error(ide_drive_t *drive, u8 err)
499 {
500 printk("{ ");
501 if (err & ABRT_ERR) printk("DriveStatusError ");
502 if (err & ICRC_ERR)
503 printk((err & ABRT_ERR) ? "BadCRC " : "BadSector ");
504 if (err & ECC_ERR) printk("UncorrectableError ");
505 if (err & ID_ERR) printk("SectorIdNotFound ");
506 if (err & TRK0_ERR) printk("TrackZeroNotFound ");
507 if (err & MARK_ERR) printk("AddrMarkNotFound ");
508 printk("}");
509 if ((err & (BBD_ERR | ABRT_ERR)) == BBD_ERR ||
510 (err & (ECC_ERR|ID_ERR|MARK_ERR))) {
511 ide_dump_sector(drive);
512 if (HWGROUP(drive) && HWGROUP(drive)->rq)
513 printk(", sector=%llu",
514 (unsigned long long)HWGROUP(drive)->rq->sector);
515 }
516 printk("\n");
517 }
518
519 static void ide_dump_atapi_error(ide_drive_t *drive, u8 err)
520 {
521 printk("{ ");
522 if (err & ILI_ERR) printk("IllegalLengthIndication ");
523 if (err & EOM_ERR) printk("EndOfMedia ");
524 if (err & ABRT_ERR) printk("AbortedCommand ");
525 if (err & MCR_ERR) printk("MediaChangeRequested ");
526 if (err & LFS_ERR) printk("LastFailedSense=0x%02x ",
527 (err & LFS_ERR) >> 4);
528 printk("}\n");
529 }
530
531 /**
532 * ide_dump_status - translate ATA/ATAPI error
533 * @drive: drive that status applies to
534 * @msg: text message to print
535 * @stat: status byte to decode
536 *
537 * Error reporting, in human readable form (luxurious, but a memory hog).
538 * Combines the drive name, message and status byte to provide a
539 * user understandable explanation of the device error.
540 */
541
542 u8 ide_dump_status(ide_drive_t *drive, const char *msg, u8 stat)
543 {
544 unsigned long flags;
545 u8 err = 0;
546
547 local_irq_save(flags);
548 printk("%s: %s: status=0x%02x { ", drive->name, msg, stat);
549 if (stat & BUSY_STAT)
550 printk("Busy ");
551 else {
552 if (stat & READY_STAT) printk("DriveReady ");
553 if (stat & WRERR_STAT) printk("DeviceFault ");
554 if (stat & SEEK_STAT) printk("SeekComplete ");
555 if (stat & DRQ_STAT) printk("DataRequest ");
556 if (stat & ECC_STAT) printk("CorrectedError ");
557 if (stat & INDEX_STAT) printk("Index ");
558 if (stat & ERR_STAT) printk("Error ");
559 }
560 printk("}\n");
561 if ((stat & (BUSY_STAT|ERR_STAT)) == ERR_STAT) {
562 err = ide_read_error(drive);
563 printk("%s: %s: error=0x%02x ", drive->name, msg, err);
564 if (drive->media == ide_disk)
565 ide_dump_ata_error(drive, err);
566 else
567 ide_dump_atapi_error(drive, err);
568 }
569 ide_dump_opcode(drive);
570 local_irq_restore(flags);
571 return err;
572 }
573
574 EXPORT_SYMBOL(ide_dump_status);
575
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