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>
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>
19 #include <asm/byteorder.h>
21 #include <asm/uaccess.h>
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" };
35 * ide_xfer_verbose - return IDE mode names
36 * @mode: transfer mode
38 * Returns a constant string giving the name of the mode
42 const char *ide_xfer_verbose(u8 mode)
47 if (mode >= XFER_UDMA_0 && mode <= XFER_UDMA_7)
49 else if (mode >= XFER_MW_DMA_0 && mode <= XFER_MW_DMA_2)
51 else if (mode >= XFER_SW_DMA_0 && mode <= XFER_SW_DMA_2)
53 else if (mode >= XFER_PIO_0 && mode <= XFER_PIO_5)
55 else if (mode == XFER_PIO_SLOW)
63 EXPORT_SYMBOL(ide_xfer_verbose);
66 * ide_rate_filter - filter transfer mode
68 * @speed: desired speed
70 * Given the available transfer modes this function returns
71 * the best available speed at or below the speed requested.
73 * TODO: check device PIO capabilities
76 static u8 ide_rate_filter(ide_drive_t *drive, u8 speed)
78 ide_hwif_t *hwif = drive->hwif;
79 u8 mode = ide_find_dma_mode(drive, speed);
83 mode = fls(hwif->pio_mask) - 1 + XFER_PIO_0;
88 // printk("%s: mode 0x%02x, speed 0x%02x\n", __FUNCTION__, mode, speed);
90 return min(speed, mode);
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).
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) */
108 EXPORT_SYMBOL_GPL(ide_pio_timings);
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.
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.
121 static struct ide_pio_info {
124 } ide_pio_blacklist [] = {
125 { "Conner Peripherals 540MB - CFS540A", 3 },
133 { "WDC AC21200", 4 },
140 { "WDC AC31000", 3 },
141 { "WDC AC31200", 3 },
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 },
151 { "SAMSUNG SHD-3121A", 1 },
152 { "SAMSUNG SHD-3122A", 1 },
153 { "SAMSUNG SHD-3172A", 1 },
164 { "ST3491A", 1 }, /* reports 3, should be 1 or 2 (depending on */
165 /* drive) according to Seagates FIND-ATA program */
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 },
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 },
185 * ide_scan_pio_blacklist - check for a blacklisted drive
186 * @model: Drive model string
188 * This routine searches the ide_pio_blacklist for an entry
189 * matching the start/whole of the supplied model name.
191 * Returns -1 if no match found.
192 * Otherwise returns the recommended PIO mode from ide_pio_blacklist[].
195 static int ide_scan_pio_blacklist (char *model)
197 struct ide_pio_info *p;
199 for (p = ide_pio_blacklist; p->name != NULL; p++) {
200 if (strncmp(p->name, model, strlen(p->name)) == 0)
206 unsigned int ide_pio_cycle_time(ide_drive_t *drive, u8 pio)
208 struct hd_driveid *id = drive->id;
211 if (id->field_valid & 2) {
212 if (id->capability & 8)
213 cycle_time = id->eide_pio_iordy;
215 cycle_time = id->eide_pio;
218 /* conservative "downgrade" for all pre-ATA2 drives */
220 if (cycle_time && cycle_time < ide_pio_timings[pio].cycle_time)
221 cycle_time = 0; /* use standard timing */
224 return cycle_time ? cycle_time : ide_pio_timings[pio].cycle_time;
227 EXPORT_SYMBOL_GPL(ide_pio_cycle_time);
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
235 * This routine returns the recommended PIO settings for a given drive,
236 * based on the drive->id information and the ide_pio_blacklist[].
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".
242 u8 ide_get_best_pio_mode (ide_drive_t *drive, u8 mode_wanted, u8 max_mode)
245 struct hd_driveid* id = drive->id;
248 if (mode_wanted != 255)
249 return min_t(u8, mode_wanted, max_mode);
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);
256 if (pio_mode > 2) { /* 2 is maximum allowed tPIO value */
260 if (id->field_valid & 2) { /* drive implements ATA2? */
261 if (id->capability & 8) { /* IORDY supported? */
262 if (id->eide_pio_modes & 7) {
264 if (id->eide_pio_modes & 4)
266 else if (id->eide_pio_modes & 2)
275 printk(KERN_INFO "%s: tPIO > 2, assuming tPIO = 2\n",
279 if (pio_mode > max_mode)
285 EXPORT_SYMBOL_GPL(ide_get_best_pio_mode);
287 /* req_pio == "255" for auto-tune */
288 void ide_set_pio(ide_drive_t *drive, u8 req_pio)
290 ide_hwif_t *hwif = drive->hwif;
293 if (hwif->set_pio_mode == NULL)
296 BUG_ON(hwif->pio_mask == 0x00);
298 host_pio = fls(hwif->pio_mask) - 1;
300 pio = ide_get_best_pio_mode(drive, req_pio, host_pio);
304 * - report device max PIO mode
305 * - check req_pio != 255 against device max PIO mode
307 printk(KERN_DEBUG "%s: host max PIO%d wanted PIO%d%s selected PIO%d\n",
308 drive->name, host_pio, req_pio,
309 req_pio == 255 ? "(auto-tune)" : "", pio);
311 (void)ide_set_pio_mode(drive, XFER_PIO_0 + pio);
314 EXPORT_SYMBOL_GPL(ide_set_pio);
317 * ide_toggle_bounce - handle bounce buffering
318 * @drive: drive to update
319 * @on: on/off boolean
321 * Enable or disable bounce buffering for the device. Drives move
322 * between PIO and DMA and that changes the rules we need.
325 void ide_toggle_bounce(ide_drive_t *drive, int on)
327 u64 addr = BLK_BOUNCE_HIGH; /* dma64_addr_t */
329 if (!PCI_DMA_BUS_IS_PHYS) {
330 addr = BLK_BOUNCE_ANY;
331 } else if (on && drive->media == ide_disk) {
332 struct device *dev = drive->hwif->dev;
334 if (dev && dev->dma_mask)
335 addr = *dev->dma_mask;
339 blk_queue_bounce_limit(drive->queue, addr);
342 int ide_set_pio_mode(ide_drive_t *drive, const u8 mode)
344 ide_hwif_t *hwif = drive->hwif;
346 if (hwif->set_pio_mode == NULL)
350 * TODO: temporary hack for some legacy host drivers that didn't
351 * set transfer mode on the device in ->set_pio_mode method...
353 if (hwif->set_dma_mode == NULL) {
354 hwif->set_pio_mode(drive, mode - XFER_PIO_0);
358 if (hwif->host_flags & IDE_HFLAG_POST_SET_MODE) {
359 if (ide_config_drive_speed(drive, mode))
361 hwif->set_pio_mode(drive, mode - XFER_PIO_0);
364 hwif->set_pio_mode(drive, mode - XFER_PIO_0);
365 return ide_config_drive_speed(drive, mode);
369 int ide_set_dma_mode(ide_drive_t *drive, const u8 mode)
371 ide_hwif_t *hwif = drive->hwif;
373 if (hwif->set_dma_mode == NULL)
376 if (hwif->host_flags & IDE_HFLAG_POST_SET_MODE) {
377 if (ide_config_drive_speed(drive, mode))
379 hwif->set_dma_mode(drive, mode);
382 hwif->set_dma_mode(drive, mode);
383 return ide_config_drive_speed(drive, mode);
387 EXPORT_SYMBOL_GPL(ide_set_dma_mode);
390 * ide_set_xfer_rate - set transfer rate
391 * @drive: drive to set
392 * @rate: speed to attempt to set
394 * General helper for setting the speed of an IDE device. This
395 * function knows about user enforced limits from the configuration
396 * which ->set_pio_mode/->set_dma_mode does not.
399 int ide_set_xfer_rate(ide_drive_t *drive, u8 rate)
401 ide_hwif_t *hwif = drive->hwif;
403 if (hwif->set_dma_mode == NULL)
406 rate = ide_rate_filter(drive, rate);
408 if (rate >= XFER_PIO_0 && rate <= XFER_PIO_5)
409 return ide_set_pio_mode(drive, rate);
412 * TODO: transfer modes 0x00-0x07 passed from the user-space are
413 * currently handled here which needs fixing (please note that such
414 * case could happen iff the transfer mode has already been set on
415 * the device by ide-proc.c::set_xfer_rate()).
417 if (rate < XFER_PIO_0) {
418 if (hwif->host_flags & IDE_HFLAG_ABUSE_SET_DMA_MODE)
419 return ide_set_dma_mode(drive, rate);
421 return ide_config_drive_speed(drive, rate);
424 return ide_set_dma_mode(drive, rate);
427 static void ide_dump_opcode(ide_drive_t *drive)
430 ide_task_t *task = NULL;
432 spin_lock(&ide_lock);
435 rq = HWGROUP(drive)->rq;
436 spin_unlock(&ide_lock);
440 if (rq->cmd_type == REQ_TYPE_ATA_TASKFILE)
443 printk("ide: failed opcode was: ");
445 printk(KERN_CONT "unknown\n");
447 printk(KERN_CONT "0x%02x\n", task->tf.command);
450 u64 ide_get_lba_addr(struct ide_taskfile *tf, int lba48)
455 high = (tf->hob_lbah << 16) | (tf->hob_lbam << 8) |
458 high = tf->device & 0xf;
459 low = (tf->lbah << 16) | (tf->lbam << 8) | tf->lbal;
461 return ((u64)high << 24) | low;
463 EXPORT_SYMBOL_GPL(ide_get_lba_addr);
465 static void ide_dump_sector(ide_drive_t *drive)
468 struct ide_taskfile *tf = &task.tf;
469 int lba48 = (drive->addressing == 1) ? 1 : 0;
471 memset(&task, 0, sizeof(task));
473 task.tf_flags = IDE_TFLAG_IN_LBA | IDE_TFLAG_IN_HOB_LBA |
476 task.tf_flags = IDE_TFLAG_IN_LBA | IDE_TFLAG_IN_DEVICE;
478 ide_tf_read(drive, &task);
480 if (lba48 || (tf->device & ATA_LBA))
481 printk(", LBAsect=%llu",
482 (unsigned long long)ide_get_lba_addr(tf, lba48));
484 printk(", CHS=%d/%d/%d", (tf->lbah << 8) + tf->lbam,
485 tf->device & 0xf, tf->lbal);
488 static void ide_dump_ata_error(ide_drive_t *drive, u8 err)
491 if (err & ABRT_ERR) printk("DriveStatusError ");
493 printk((err & ABRT_ERR) ? "BadCRC " : "BadSector ");
494 if (err & ECC_ERR) printk("UncorrectableError ");
495 if (err & ID_ERR) printk("SectorIdNotFound ");
496 if (err & TRK0_ERR) printk("TrackZeroNotFound ");
497 if (err & MARK_ERR) printk("AddrMarkNotFound ");
499 if ((err & (BBD_ERR | ABRT_ERR)) == BBD_ERR ||
500 (err & (ECC_ERR|ID_ERR|MARK_ERR))) {
501 ide_dump_sector(drive);
502 if (HWGROUP(drive) && HWGROUP(drive)->rq)
503 printk(", sector=%llu",
504 (unsigned long long)HWGROUP(drive)->rq->sector);
509 static void ide_dump_atapi_error(ide_drive_t *drive, u8 err)
512 if (err & ILI_ERR) printk("IllegalLengthIndication ");
513 if (err & EOM_ERR) printk("EndOfMedia ");
514 if (err & ABRT_ERR) printk("AbortedCommand ");
515 if (err & MCR_ERR) printk("MediaChangeRequested ");
516 if (err & LFS_ERR) printk("LastFailedSense=0x%02x ",
517 (err & LFS_ERR) >> 4);
522 * ide_dump_status - translate ATA/ATAPI error
523 * @drive: drive that status applies to
524 * @msg: text message to print
525 * @stat: status byte to decode
527 * Error reporting, in human readable form (luxurious, but a memory hog).
528 * Combines the drive name, message and status byte to provide a
529 * user understandable explanation of the device error.
532 u8 ide_dump_status(ide_drive_t *drive, const char *msg, u8 stat)
537 local_irq_save(flags);
538 printk("%s: %s: status=0x%02x { ", drive->name, msg, stat);
539 if (stat & BUSY_STAT)
542 if (stat & READY_STAT) printk("DriveReady ");
543 if (stat & WRERR_STAT) printk("DeviceFault ");
544 if (stat & SEEK_STAT) printk("SeekComplete ");
545 if (stat & DRQ_STAT) printk("DataRequest ");
546 if (stat & ECC_STAT) printk("CorrectedError ");
547 if (stat & INDEX_STAT) printk("Index ");
548 if (stat & ERR_STAT) printk("Error ");
551 if ((stat & (BUSY_STAT|ERR_STAT)) == ERR_STAT) {
552 err = ide_read_error(drive);
553 printk("%s: %s: error=0x%02x ", drive->name, msg, err);
554 if (drive->media == ide_disk)
555 ide_dump_ata_error(drive, err);
557 ide_dump_atapi_error(drive, err);
559 ide_dump_opcode(drive);
560 local_irq_restore(flags);
564 EXPORT_SYMBOL(ide_dump_status);