1 #include <linux/types.h>
2 #include <linux/string.h>
3 #include <linux/kernel.h>
4 #include <linux/interrupt.h>
5 #include <linux/hdreg.h>
7 #include <linux/bitops.h>
9 static const char *udma_str[] =
10 { "UDMA/16", "UDMA/25", "UDMA/33", "UDMA/44",
11 "UDMA/66", "UDMA/100", "UDMA/133", "UDMA7" };
12 static const char *mwdma_str[] =
13 { "MWDMA0", "MWDMA1", "MWDMA2" };
14 static const char *swdma_str[] =
15 { "SWDMA0", "SWDMA1", "SWDMA2" };
16 static const char *pio_str[] =
17 { "PIO0", "PIO1", "PIO2", "PIO3", "PIO4", "PIO5" };
20 * ide_xfer_verbose - return IDE mode names
21 * @mode: transfer mode
23 * Returns a constant string giving the name of the mode
27 const char *ide_xfer_verbose(u8 mode)
32 if (mode >= XFER_UDMA_0 && mode <= XFER_UDMA_7)
34 else if (mode >= XFER_MW_DMA_0 && mode <= XFER_MW_DMA_2)
36 else if (mode >= XFER_SW_DMA_0 && mode <= XFER_SW_DMA_2)
38 else if (mode >= XFER_PIO_0 && mode <= XFER_PIO_5)
40 else if (mode == XFER_PIO_SLOW)
48 EXPORT_SYMBOL(ide_xfer_verbose);
51 * ide_rate_filter - filter transfer mode
53 * @speed: desired speed
55 * Given the available transfer modes this function returns
56 * the best available speed at or below the speed requested.
58 * TODO: check device PIO capabilities
61 static u8 ide_rate_filter(ide_drive_t *drive, u8 speed)
63 ide_hwif_t *hwif = drive->hwif;
64 u8 mode = ide_find_dma_mode(drive, speed);
68 mode = fls(hwif->pio_mask) - 1 + XFER_PIO_0;
73 /* printk("%s: mode 0x%02x, speed 0x%02x\n", __func__, mode, speed); */
75 return min(speed, mode);
79 * Shared data/functions for determining best PIO mode for an IDE drive.
80 * Most of this stuff originally lived in cmd640.c, and changes to the
81 * ide_pio_blacklist[] table should be made with EXTREME CAUTION to avoid
82 * breaking the fragile cmd640.c support.
86 * Black list. Some drives incorrectly report their maximal PIO mode,
87 * at least in respect to CMD640. Here we keep info on some known drives.
89 static struct ide_pio_info {
92 } ide_pio_blacklist [] = {
93 { "Conner Peripherals 540MB - CFS540A", 3 },
101 { "WDC AC21200", 4 },
108 { "WDC AC31000", 3 },
109 { "WDC AC31200", 3 },
111 { "Maxtor 7131 AT", 1 },
112 { "Maxtor 7171 AT", 1 },
113 { "Maxtor 7213 AT", 1 },
114 { "Maxtor 7245 AT", 1 },
115 { "Maxtor 7345 AT", 1 },
116 { "Maxtor 7546 AT", 3 },
117 { "Maxtor 7540 AV", 3 },
119 { "SAMSUNG SHD-3121A", 1 },
120 { "SAMSUNG SHD-3122A", 1 },
121 { "SAMSUNG SHD-3172A", 1 },
132 { "ST3491A", 1 }, /* reports 3, should be 1 or 2 (depending on */
133 /* drive) according to Seagates FIND-ATA program */
135 { "QUANTUM ELS127A", 0 },
136 { "QUANTUM ELS170A", 0 },
137 { "QUANTUM LPS240A", 0 },
138 { "QUANTUM LPS210A", 3 },
139 { "QUANTUM LPS270A", 3 },
140 { "QUANTUM LPS365A", 3 },
141 { "QUANTUM LPS540A", 3 },
142 { "QUANTUM LIGHTNING 540A", 3 },
143 { "QUANTUM LIGHTNING 730A", 3 },
145 { "QUANTUM FIREBALL_540", 3 }, /* Older Quantum Fireballs don't work */
146 { "QUANTUM FIREBALL_640", 3 },
147 { "QUANTUM FIREBALL_1080", 3 },
148 { "QUANTUM FIREBALL_1280", 3 },
153 * ide_scan_pio_blacklist - check for a blacklisted drive
154 * @model: Drive model string
156 * This routine searches the ide_pio_blacklist for an entry
157 * matching the start/whole of the supplied model name.
159 * Returns -1 if no match found.
160 * Otherwise returns the recommended PIO mode from ide_pio_blacklist[].
163 static int ide_scan_pio_blacklist (char *model)
165 struct ide_pio_info *p;
167 for (p = ide_pio_blacklist; p->name != NULL; p++) {
168 if (strncmp(p->name, model, strlen(p->name)) == 0)
175 * ide_get_best_pio_mode - get PIO mode from drive
176 * @drive: drive to consider
177 * @mode_wanted: preferred mode
178 * @max_mode: highest allowed mode
180 * This routine returns the recommended PIO settings for a given drive,
181 * based on the drive->id information and the ide_pio_blacklist[].
183 * Drive PIO mode is auto-selected if 255 is passed as mode_wanted.
184 * This is used by most chipset support modules when "auto-tuning".
187 u8 ide_get_best_pio_mode (ide_drive_t *drive, u8 mode_wanted, u8 max_mode)
190 struct hd_driveid* id = drive->id;
193 if (mode_wanted != 255)
194 return min_t(u8, mode_wanted, max_mode);
196 if ((drive->hwif->host_flags & IDE_HFLAG_PIO_NO_BLACKLIST) == 0 &&
197 (pio_mode = ide_scan_pio_blacklist(id->model)) != -1) {
198 printk(KERN_INFO "%s: is on PIO blacklist\n", drive->name);
201 if (pio_mode > 2) { /* 2 is maximum allowed tPIO value */
205 if (id->field_valid & 2) { /* drive implements ATA2? */
206 if (id->capability & 8) { /* IORDY supported? */
207 if (id->eide_pio_modes & 7) {
209 if (id->eide_pio_modes & 4)
211 else if (id->eide_pio_modes & 2)
220 printk(KERN_INFO "%s: tPIO > 2, assuming tPIO = 2\n",
224 if (pio_mode > max_mode)
230 EXPORT_SYMBOL_GPL(ide_get_best_pio_mode);
232 /* req_pio == "255" for auto-tune */
233 void ide_set_pio(ide_drive_t *drive, u8 req_pio)
235 ide_hwif_t *hwif = drive->hwif;
236 const struct ide_port_ops *port_ops = hwif->port_ops;
239 if (port_ops == NULL || port_ops->set_pio_mode == NULL ||
240 (hwif->host_flags & IDE_HFLAG_NO_SET_MODE))
243 BUG_ON(hwif->pio_mask == 0x00);
245 host_pio = fls(hwif->pio_mask) - 1;
247 pio = ide_get_best_pio_mode(drive, req_pio, host_pio);
251 * - report device max PIO mode
252 * - check req_pio != 255 against device max PIO mode
254 printk(KERN_DEBUG "%s: host max PIO%d wanted PIO%d%s selected PIO%d\n",
255 drive->name, host_pio, req_pio,
256 req_pio == 255 ? "(auto-tune)" : "", pio);
258 (void)ide_set_pio_mode(drive, XFER_PIO_0 + pio);
261 EXPORT_SYMBOL_GPL(ide_set_pio);
264 * ide_toggle_bounce - handle bounce buffering
265 * @drive: drive to update
266 * @on: on/off boolean
268 * Enable or disable bounce buffering for the device. Drives move
269 * between PIO and DMA and that changes the rules we need.
272 void ide_toggle_bounce(ide_drive_t *drive, int on)
274 u64 addr = BLK_BOUNCE_HIGH; /* dma64_addr_t */
276 if (!PCI_DMA_BUS_IS_PHYS) {
277 addr = BLK_BOUNCE_ANY;
278 } else if (on && drive->media == ide_disk) {
279 struct device *dev = drive->hwif->dev;
281 if (dev && dev->dma_mask)
282 addr = *dev->dma_mask;
286 blk_queue_bounce_limit(drive->queue, addr);
289 int ide_set_pio_mode(ide_drive_t *drive, const u8 mode)
291 ide_hwif_t *hwif = drive->hwif;
292 const struct ide_port_ops *port_ops = hwif->port_ops;
294 if (hwif->host_flags & IDE_HFLAG_NO_SET_MODE)
297 if (port_ops == NULL || port_ops->set_pio_mode == NULL)
301 * TODO: temporary hack for some legacy host drivers that didn't
302 * set transfer mode on the device in ->set_pio_mode method...
304 if (port_ops->set_dma_mode == NULL) {
305 port_ops->set_pio_mode(drive, mode - XFER_PIO_0);
309 if (hwif->host_flags & IDE_HFLAG_POST_SET_MODE) {
310 if (ide_config_drive_speed(drive, mode))
312 port_ops->set_pio_mode(drive, mode - XFER_PIO_0);
315 port_ops->set_pio_mode(drive, mode - XFER_PIO_0);
316 return ide_config_drive_speed(drive, mode);
320 int ide_set_dma_mode(ide_drive_t *drive, const u8 mode)
322 ide_hwif_t *hwif = drive->hwif;
323 const struct ide_port_ops *port_ops = hwif->port_ops;
325 if (hwif->host_flags & IDE_HFLAG_NO_SET_MODE)
328 if (port_ops == NULL || port_ops->set_dma_mode == NULL)
331 if (hwif->host_flags & IDE_HFLAG_POST_SET_MODE) {
332 if (ide_config_drive_speed(drive, mode))
334 port_ops->set_dma_mode(drive, mode);
337 port_ops->set_dma_mode(drive, mode);
338 return ide_config_drive_speed(drive, mode);
342 EXPORT_SYMBOL_GPL(ide_set_dma_mode);
345 * ide_set_xfer_rate - set transfer rate
346 * @drive: drive to set
347 * @rate: speed to attempt to set
349 * General helper for setting the speed of an IDE device. This
350 * function knows about user enforced limits from the configuration
351 * which ->set_pio_mode/->set_dma_mode does not.
354 int ide_set_xfer_rate(ide_drive_t *drive, u8 rate)
356 ide_hwif_t *hwif = drive->hwif;
357 const struct ide_port_ops *port_ops = hwif->port_ops;
359 if (port_ops == NULL || port_ops->set_dma_mode == NULL ||
360 (hwif->host_flags & IDE_HFLAG_NO_SET_MODE))
363 rate = ide_rate_filter(drive, rate);
365 if (rate >= XFER_PIO_0 && rate <= XFER_PIO_5)
366 return ide_set_pio_mode(drive, rate);
369 * TODO: transfer modes 0x00-0x07 passed from the user-space are
370 * currently handled here which needs fixing (please note that such
371 * case could happen iff the transfer mode has already been set on
372 * the device by ide-proc.c::set_xfer_rate()).
374 if (rate < XFER_PIO_0) {
375 if (hwif->host_flags & IDE_HFLAG_ABUSE_SET_DMA_MODE)
376 return ide_set_dma_mode(drive, rate);
378 return ide_config_drive_speed(drive, rate);
381 return ide_set_dma_mode(drive, rate);
384 static void ide_dump_opcode(ide_drive_t *drive)
387 ide_task_t *task = NULL;
389 spin_lock(&ide_lock);
392 rq = HWGROUP(drive)->rq;
393 spin_unlock(&ide_lock);
397 if (rq->cmd_type == REQ_TYPE_ATA_TASKFILE)
400 printk("ide: failed opcode was: ");
402 printk(KERN_CONT "unknown\n");
404 printk(KERN_CONT "0x%02x\n", task->tf.command);
407 u64 ide_get_lba_addr(struct ide_taskfile *tf, int lba48)
412 high = (tf->hob_lbah << 16) | (tf->hob_lbam << 8) |
415 high = tf->device & 0xf;
416 low = (tf->lbah << 16) | (tf->lbam << 8) | tf->lbal;
418 return ((u64)high << 24) | low;
420 EXPORT_SYMBOL_GPL(ide_get_lba_addr);
422 static void ide_dump_sector(ide_drive_t *drive)
425 struct ide_taskfile *tf = &task.tf;
426 int lba48 = (drive->addressing == 1) ? 1 : 0;
428 memset(&task, 0, sizeof(task));
430 task.tf_flags = IDE_TFLAG_IN_LBA | IDE_TFLAG_IN_HOB_LBA |
433 task.tf_flags = IDE_TFLAG_IN_LBA | IDE_TFLAG_IN_DEVICE;
435 drive->hwif->tf_read(drive, &task);
437 if (lba48 || (tf->device & ATA_LBA))
438 printk(", LBAsect=%llu",
439 (unsigned long long)ide_get_lba_addr(tf, lba48));
441 printk(", CHS=%d/%d/%d", (tf->lbah << 8) + tf->lbam,
442 tf->device & 0xf, tf->lbal);
445 static void ide_dump_ata_error(ide_drive_t *drive, u8 err)
448 if (err & ABRT_ERR) printk("DriveStatusError ");
450 printk((err & ABRT_ERR) ? "BadCRC " : "BadSector ");
451 if (err & ECC_ERR) printk("UncorrectableError ");
452 if (err & ID_ERR) printk("SectorIdNotFound ");
453 if (err & TRK0_ERR) printk("TrackZeroNotFound ");
454 if (err & MARK_ERR) printk("AddrMarkNotFound ");
456 if ((err & (BBD_ERR | ABRT_ERR)) == BBD_ERR ||
457 (err & (ECC_ERR|ID_ERR|MARK_ERR))) {
458 ide_dump_sector(drive);
459 if (HWGROUP(drive) && HWGROUP(drive)->rq)
460 printk(", sector=%llu",
461 (unsigned long long)HWGROUP(drive)->rq->sector);
466 static void ide_dump_atapi_error(ide_drive_t *drive, u8 err)
469 if (err & ILI_ERR) printk("IllegalLengthIndication ");
470 if (err & EOM_ERR) printk("EndOfMedia ");
471 if (err & ABRT_ERR) printk("AbortedCommand ");
472 if (err & MCR_ERR) printk("MediaChangeRequested ");
473 if (err & LFS_ERR) printk("LastFailedSense=0x%02x ",
474 (err & LFS_ERR) >> 4);
479 * ide_dump_status - translate ATA/ATAPI error
480 * @drive: drive that status applies to
481 * @msg: text message to print
482 * @stat: status byte to decode
484 * Error reporting, in human readable form (luxurious, but a memory hog).
485 * Combines the drive name, message and status byte to provide a
486 * user understandable explanation of the device error.
489 u8 ide_dump_status(ide_drive_t *drive, const char *msg, u8 stat)
494 local_irq_save(flags);
495 printk("%s: %s: status=0x%02x { ", drive->name, msg, stat);
496 if (stat & BUSY_STAT)
499 if (stat & READY_STAT) printk("DriveReady ");
500 if (stat & WRERR_STAT) printk("DeviceFault ");
501 if (stat & SEEK_STAT) printk("SeekComplete ");
502 if (stat & DRQ_STAT) printk("DataRequest ");
503 if (stat & ECC_STAT) printk("CorrectedError ");
504 if (stat & INDEX_STAT) printk("Index ");
505 if (stat & ERR_STAT) printk("Error ");
508 if ((stat & (BUSY_STAT|ERR_STAT)) == ERR_STAT) {
509 err = ide_read_error(drive);
510 printk("%s: %s: error=0x%02x ", drive->name, msg, err);
511 if (drive->media == ide_disk)
512 ide_dump_ata_error(drive, err);
514 ide_dump_atapi_error(drive, err);
516 ide_dump_opcode(drive);
517 local_irq_restore(flags);
521 EXPORT_SYMBOL(ide_dump_status);