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>
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
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
33 static const char *udma_str[] =
34 { "UDMA/16", "UDMA/25", "UDMA/33", "UDMA/44",
35 "UDMA/66", "UDMA/100", "UDMA/133", "UDMA7" };
36 static const char *mwdma_str[] =
37 { "MWDMA0", "MWDMA1", "MWDMA2" };
38 static const char *swdma_str[] =
39 { "SWDMA0", "SWDMA1", "SWDMA2" };
40 static const char *pio_str[] =
41 { "PIO0", "PIO1", "PIO2", "PIO3", "PIO4", "PIO5" };
44 * ide_xfer_verbose - return IDE mode names
45 * @mode: transfer mode
47 * Returns a constant string giving the name of the mode
51 const char *ide_xfer_verbose(u8 mode)
56 if (mode >= XFER_UDMA_0 && mode <= XFER_UDMA_7)
58 else if (mode >= XFER_MW_DMA_0 && mode <= XFER_MW_DMA_2)
60 else if (mode >= XFER_SW_DMA_0 && mode <= XFER_SW_DMA_2)
62 else if (mode >= XFER_PIO_0 && mode <= XFER_PIO_5)
64 else if (mode == XFER_PIO_SLOW)
72 EXPORT_SYMBOL(ide_xfer_verbose);
75 * ide_rate_filter - filter transfer mode
77 * @speed: desired speed
79 * Given the available transfer modes this function returns
80 * the best available speed at or below the speed requested.
82 * TODO: check device PIO capabilities
85 static u8 ide_rate_filter(ide_drive_t *drive, u8 speed)
87 ide_hwif_t *hwif = drive->hwif;
88 u8 mode = ide_find_dma_mode(drive, speed);
92 mode = fls(hwif->pio_mask) - 1 + XFER_PIO_0;
97 // printk("%s: mode 0x%02x, speed 0x%02x\n", __FUNCTION__, mode, speed);
99 return min(speed, mode);
103 * Standard (generic) timings for PIO modes, from ATA2 specification.
104 * These timings are for access to the IDE data port register *only*.
105 * Some drives may specify a mode, while also specifying a different
106 * value for cycle_time (from drive identification data).
108 const ide_pio_timings_t ide_pio_timings[6] = {
109 { 70, 165, 600 }, /* PIO Mode 0 */
110 { 50, 125, 383 }, /* PIO Mode 1 */
111 { 30, 100, 240 }, /* PIO Mode 2 */
112 { 30, 80, 180 }, /* PIO Mode 3 with IORDY */
113 { 25, 70, 120 }, /* PIO Mode 4 with IORDY */
114 { 20, 50, 100 } /* PIO Mode 5 with IORDY (nonstandard) */
117 EXPORT_SYMBOL_GPL(ide_pio_timings);
120 * Shared data/functions for determining best PIO mode for an IDE drive.
121 * Most of this stuff originally lived in cmd640.c, and changes to the
122 * ide_pio_blacklist[] table should be made with EXTREME CAUTION to avoid
123 * breaking the fragile cmd640.c support.
127 * Black list. Some drives incorrectly report their maximal PIO mode,
128 * at least in respect to CMD640. Here we keep info on some known drives.
130 static struct ide_pio_info {
133 } ide_pio_blacklist [] = {
134 /* { "Conner Peripherals 1275MB - CFS1275A", 4 }, */
135 { "Conner Peripherals 540MB - CFS540A", 3 },
143 { "WDC AC21200", 4 },
150 /* { "WDC AC21000", 4 }, */
151 { "WDC AC31000", 3 },
152 { "WDC AC31200", 3 },
153 /* { "WDC AC31600", 4 }, */
155 { "Maxtor 7131 AT", 1 },
156 { "Maxtor 7171 AT", 1 },
157 { "Maxtor 7213 AT", 1 },
158 { "Maxtor 7245 AT", 1 },
159 { "Maxtor 7345 AT", 1 },
160 { "Maxtor 7546 AT", 3 },
161 { "Maxtor 7540 AV", 3 },
163 { "SAMSUNG SHD-3121A", 1 },
164 { "SAMSUNG SHD-3122A", 1 },
165 { "SAMSUNG SHD-3172A", 1 },
167 /* { "ST51080A", 4 },
183 { "ST3491A", 1 }, /* reports 3, should be 1 or 2 (depending on */
184 /* drive) according to Seagates FIND-ATA program */
186 { "QUANTUM ELS127A", 0 },
187 { "QUANTUM ELS170A", 0 },
188 { "QUANTUM LPS240A", 0 },
189 { "QUANTUM LPS210A", 3 },
190 { "QUANTUM LPS270A", 3 },
191 { "QUANTUM LPS365A", 3 },
192 { "QUANTUM LPS540A", 3 },
193 { "QUANTUM LIGHTNING 540A", 3 },
194 { "QUANTUM LIGHTNING 730A", 3 },
196 { "QUANTUM FIREBALL_540", 3 }, /* Older Quantum Fireballs don't work */
197 { "QUANTUM FIREBALL_640", 3 },
198 { "QUANTUM FIREBALL_1080", 3 },
199 { "QUANTUM FIREBALL_1280", 3 },
204 * ide_scan_pio_blacklist - check for a blacklisted drive
205 * @model: Drive model string
207 * This routine searches the ide_pio_blacklist for an entry
208 * matching the start/whole of the supplied model name.
210 * Returns -1 if no match found.
211 * Otherwise returns the recommended PIO mode from ide_pio_blacklist[].
214 static int ide_scan_pio_blacklist (char *model)
216 struct ide_pio_info *p;
218 for (p = ide_pio_blacklist; p->name != NULL; p++) {
219 if (strncmp(p->name, model, strlen(p->name)) == 0)
225 unsigned int ide_pio_cycle_time(ide_drive_t *drive, u8 pio)
227 struct hd_driveid *id = drive->id;
230 if (id->field_valid & 2) {
231 if (id->capability & 8)
232 cycle_time = id->eide_pio_iordy;
234 cycle_time = id->eide_pio;
237 /* conservative "downgrade" for all pre-ATA2 drives */
239 if (cycle_time && cycle_time < ide_pio_timings[pio].cycle_time)
240 cycle_time = 0; /* use standard timing */
243 return cycle_time ? cycle_time : ide_pio_timings[pio].cycle_time;
246 EXPORT_SYMBOL_GPL(ide_pio_cycle_time);
249 * ide_get_best_pio_mode - get PIO mode from drive
250 * @drive: drive to consider
251 * @mode_wanted: preferred mode
252 * @max_mode: highest allowed mode
254 * This routine returns the recommended PIO settings for a given drive,
255 * based on the drive->id information and the ide_pio_blacklist[].
257 * Drive PIO mode is auto-selected if 255 is passed as mode_wanted.
258 * This is used by most chipset support modules when "auto-tuning".
261 u8 ide_get_best_pio_mode (ide_drive_t *drive, u8 mode_wanted, u8 max_mode)
264 struct hd_driveid* id = drive->id;
267 if (mode_wanted != 255)
268 return min_t(u8, mode_wanted, max_mode);
270 if ((drive->hwif->host_flags & IDE_HFLAG_PIO_NO_BLACKLIST) == 0 &&
271 (pio_mode = ide_scan_pio_blacklist(id->model)) != -1) {
272 printk(KERN_INFO "%s: is on PIO blacklist\n", drive->name);
275 if (pio_mode > 2) { /* 2 is maximum allowed tPIO value */
279 if (id->field_valid & 2) { /* drive implements ATA2? */
280 if (id->capability & 8) { /* IORDY supported? */
281 if (id->eide_pio_modes & 7) {
283 if (id->eide_pio_modes & 4)
285 else if (id->eide_pio_modes & 2)
294 printk(KERN_INFO "%s: tPIO > 2, assuming tPIO = 2\n",
298 * Conservative "downgrade" for all pre-ATA2 drives
300 if ((drive->hwif->host_flags & IDE_HFLAG_PIO_NO_DOWNGRADE) == 0 &&
301 pio_mode && pio_mode < 4) {
303 printk(KERN_INFO "%s: applying conservative "
304 "PIO \"downgrade\"\n", drive->name);
308 if (pio_mode > max_mode)
314 EXPORT_SYMBOL_GPL(ide_get_best_pio_mode);
316 /* req_pio == "255" for auto-tune */
317 void ide_set_pio(ide_drive_t *drive, u8 req_pio)
319 ide_hwif_t *hwif = drive->hwif;
322 if (hwif->set_pio_mode == NULL)
325 BUG_ON(hwif->pio_mask == 0x00);
327 host_pio = fls(hwif->pio_mask) - 1;
329 pio = ide_get_best_pio_mode(drive, req_pio, host_pio);
333 * - report device max PIO mode
334 * - check req_pio != 255 against device max PIO mode
336 printk(KERN_DEBUG "%s: host max PIO%d wanted PIO%d%s selected PIO%d\n",
337 drive->name, host_pio, req_pio,
338 req_pio == 255 ? "(auto-tune)" : "", pio);
340 (void)ide_set_pio_mode(drive, XFER_PIO_0 + pio);
343 EXPORT_SYMBOL_GPL(ide_set_pio);
346 * ide_toggle_bounce - handle bounce buffering
347 * @drive: drive to update
348 * @on: on/off boolean
350 * Enable or disable bounce buffering for the device. Drives move
351 * between PIO and DMA and that changes the rules we need.
354 void ide_toggle_bounce(ide_drive_t *drive, int on)
356 u64 addr = BLK_BOUNCE_HIGH; /* dma64_addr_t */
358 if (!PCI_DMA_BUS_IS_PHYS) {
359 addr = BLK_BOUNCE_ANY;
360 } else if (on && drive->media == ide_disk) {
361 struct device *dev = drive->hwif->dev;
363 if (dev && dev->dma_mask)
364 addr = *dev->dma_mask;
368 blk_queue_bounce_limit(drive->queue, addr);
371 int ide_set_pio_mode(ide_drive_t *drive, const u8 mode)
373 ide_hwif_t *hwif = drive->hwif;
375 if (hwif->set_pio_mode == NULL)
379 * TODO: temporary hack for some legacy host drivers that didn't
380 * set transfer mode on the device in ->set_pio_mode method...
382 if (hwif->set_dma_mode == NULL) {
383 hwif->set_pio_mode(drive, mode - XFER_PIO_0);
387 if (hwif->host_flags & IDE_HFLAG_POST_SET_MODE) {
388 if (ide_config_drive_speed(drive, mode))
390 hwif->set_pio_mode(drive, mode - XFER_PIO_0);
393 hwif->set_pio_mode(drive, mode - XFER_PIO_0);
394 return ide_config_drive_speed(drive, mode);
398 int ide_set_dma_mode(ide_drive_t *drive, const u8 mode)
400 ide_hwif_t *hwif = drive->hwif;
402 if (hwif->set_dma_mode == NULL)
405 if (hwif->host_flags & IDE_HFLAG_POST_SET_MODE) {
406 if (ide_config_drive_speed(drive, mode))
408 hwif->set_dma_mode(drive, mode);
411 hwif->set_dma_mode(drive, mode);
412 return ide_config_drive_speed(drive, mode);
416 EXPORT_SYMBOL_GPL(ide_set_dma_mode);
419 * ide_set_xfer_rate - set transfer rate
420 * @drive: drive to set
421 * @rate: speed to attempt to set
423 * General helper for setting the speed of an IDE device. This
424 * function knows about user enforced limits from the configuration
425 * which ->set_pio_mode/->set_dma_mode does not.
428 int ide_set_xfer_rate(ide_drive_t *drive, u8 rate)
430 ide_hwif_t *hwif = drive->hwif;
432 if (hwif->set_dma_mode == NULL)
435 rate = ide_rate_filter(drive, rate);
437 if (rate >= XFER_PIO_0 && rate <= XFER_PIO_5)
438 return ide_set_pio_mode(drive, rate);
441 * TODO: transfer modes 0x00-0x07 passed from the user-space are
442 * currently handled here which needs fixing (please note that such
443 * case could happen iff the transfer mode has already been set on
444 * the device by ide-proc.c::set_xfer_rate()).
446 if (rate < XFER_PIO_0) {
447 if (hwif->host_flags & IDE_HFLAG_ABUSE_SET_DMA_MODE)
448 return ide_set_dma_mode(drive, rate);
450 return ide_config_drive_speed(drive, rate);
453 return ide_set_dma_mode(drive, rate);
456 static void ide_dump_opcode(ide_drive_t *drive)
459 ide_task_t *task = NULL;
461 spin_lock(&ide_lock);
464 rq = HWGROUP(drive)->rq;
465 spin_unlock(&ide_lock);
469 if (rq->cmd_type == REQ_TYPE_ATA_TASKFILE)
472 printk("ide: failed opcode was: ");
474 printk(KERN_CONT "unknown\n");
476 printk(KERN_CONT "0x%02x\n", task->tf.command);
479 u64 ide_get_lba_addr(struct ide_taskfile *tf, int lba48)
484 high = (tf->hob_lbah << 16) | (tf->hob_lbam << 8) |
487 high = tf->device & 0xf;
488 low = (tf->lbah << 16) | (tf->lbam << 8) | tf->lbal;
490 return ((u64)high << 24) | low;
492 EXPORT_SYMBOL_GPL(ide_get_lba_addr);
494 static void ide_dump_sector(ide_drive_t *drive)
497 struct ide_taskfile *tf = &task.tf;
498 int lba48 = (drive->addressing == 1) ? 1 : 0;
500 memset(&task, 0, sizeof(task));
502 task.tf_flags = IDE_TFLAG_IN_LBA | IDE_TFLAG_IN_HOB_LBA |
505 task.tf_flags = IDE_TFLAG_IN_LBA | IDE_TFLAG_IN_DEVICE;
507 ide_tf_read(drive, &task);
509 if (lba48 || (tf->device & ATA_LBA))
510 printk(", LBAsect=%llu",
511 (unsigned long long)ide_get_lba_addr(tf, lba48));
513 printk(", CHS=%d/%d/%d", (tf->lbah << 8) + tf->lbam,
514 tf->device & 0xf, tf->lbal);
517 static void ide_dump_ata_error(ide_drive_t *drive, u8 err)
520 if (err & ABRT_ERR) printk("DriveStatusError ");
522 printk((err & ABRT_ERR) ? "BadCRC " : "BadSector ");
523 if (err & ECC_ERR) printk("UncorrectableError ");
524 if (err & ID_ERR) printk("SectorIdNotFound ");
525 if (err & TRK0_ERR) printk("TrackZeroNotFound ");
526 if (err & MARK_ERR) printk("AddrMarkNotFound ");
528 if ((err & (BBD_ERR | ABRT_ERR)) == BBD_ERR ||
529 (err & (ECC_ERR|ID_ERR|MARK_ERR))) {
530 ide_dump_sector(drive);
531 if (HWGROUP(drive) && HWGROUP(drive)->rq)
532 printk(", sector=%llu",
533 (unsigned long long)HWGROUP(drive)->rq->sector);
538 static void ide_dump_atapi_error(ide_drive_t *drive, u8 err)
541 if (err & ILI_ERR) printk("IllegalLengthIndication ");
542 if (err & EOM_ERR) printk("EndOfMedia ");
543 if (err & ABRT_ERR) printk("AbortedCommand ");
544 if (err & MCR_ERR) printk("MediaChangeRequested ");
545 if (err & LFS_ERR) printk("LastFailedSense=0x%02x ",
546 (err & LFS_ERR) >> 4);
551 * ide_dump_status - translate ATA/ATAPI error
552 * @drive: drive that status applies to
553 * @msg: text message to print
554 * @stat: status byte to decode
556 * Error reporting, in human readable form (luxurious, but a memory hog).
557 * Combines the drive name, message and status byte to provide a
558 * user understandable explanation of the device error.
561 u8 ide_dump_status(ide_drive_t *drive, const char *msg, u8 stat)
566 local_irq_save(flags);
567 printk("%s: %s: status=0x%02x { ", drive->name, msg, stat);
568 if (stat & BUSY_STAT)
571 if (stat & READY_STAT) printk("DriveReady ");
572 if (stat & WRERR_STAT) printk("DeviceFault ");
573 if (stat & SEEK_STAT) printk("SeekComplete ");
574 if (stat & DRQ_STAT) printk("DataRequest ");
575 if (stat & ECC_STAT) printk("CorrectedError ");
576 if (stat & INDEX_STAT) printk("Index ");
577 if (stat & ERR_STAT) printk("Error ");
580 if ((stat & (BUSY_STAT|ERR_STAT)) == ERR_STAT) {
581 err = ide_read_error(drive);
582 printk("%s: %s: error=0x%02x ", drive->name, msg, err);
583 if (drive->media == ide_disk)
584 ide_dump_ata_error(drive, err);
586 ide_dump_atapi_error(drive, err);
588 ide_dump_opcode(drive);
589 local_irq_restore(flags);
593 EXPORT_SYMBOL(ide_dump_status);