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 * ide_get_best_pio_mode - get PIO mode from drive
80 * @drive: drive to consider
81 * @mode_wanted: preferred mode
82 * @max_mode: highest allowed mode
84 * This routine returns the recommended PIO settings for a given drive,
85 * based on the drive->id information and the ide_pio_blacklist[].
87 * Drive PIO mode is auto-selected if 255 is passed as mode_wanted.
88 * This is used by most chipset support modules when "auto-tuning".
91 u8 ide_get_best_pio_mode (ide_drive_t *drive, u8 mode_wanted, u8 max_mode)
94 int pio_mode = -1, overridden = 0;
96 if (mode_wanted != 255)
97 return min_t(u8, mode_wanted, max_mode);
99 if ((drive->hwif->host_flags & IDE_HFLAG_PIO_NO_BLACKLIST) == 0)
100 pio_mode = ide_scan_pio_blacklist((char *)&id[ATA_ID_PROD]);
102 if (pio_mode != -1) {
103 printk(KERN_INFO "%s: is on PIO blacklist\n", drive->name);
105 pio_mode = id[ATA_ID_OLD_PIO_MODES] >> 8;
106 if (pio_mode > 2) { /* 2 is maximum allowed tPIO value */
111 if (id[ATA_ID_FIELD_VALID] & 2) { /* ATA2? */
112 if (ata_id_has_iordy(id)) {
113 if (id[ATA_ID_PIO_MODES] & 7) {
115 if (id[ATA_ID_PIO_MODES] & 4)
117 else if (id[ATA_ID_PIO_MODES] & 2)
126 printk(KERN_INFO "%s: tPIO > 2, assuming tPIO = 2\n",
130 if (pio_mode > max_mode)
136 EXPORT_SYMBOL_GPL(ide_get_best_pio_mode);
138 /* req_pio == "255" for auto-tune */
139 void ide_set_pio(ide_drive_t *drive, u8 req_pio)
141 ide_hwif_t *hwif = drive->hwif;
142 const struct ide_port_ops *port_ops = hwif->port_ops;
145 if (port_ops == NULL || port_ops->set_pio_mode == NULL ||
146 (hwif->host_flags & IDE_HFLAG_NO_SET_MODE))
149 BUG_ON(hwif->pio_mask == 0x00);
151 host_pio = fls(hwif->pio_mask) - 1;
153 pio = ide_get_best_pio_mode(drive, req_pio, host_pio);
157 * - report device max PIO mode
158 * - check req_pio != 255 against device max PIO mode
160 printk(KERN_DEBUG "%s: host max PIO%d wanted PIO%d%s selected PIO%d\n",
161 drive->name, host_pio, req_pio,
162 req_pio == 255 ? "(auto-tune)" : "", pio);
164 (void)ide_set_pio_mode(drive, XFER_PIO_0 + pio);
167 EXPORT_SYMBOL_GPL(ide_set_pio);
170 * ide_toggle_bounce - handle bounce buffering
171 * @drive: drive to update
172 * @on: on/off boolean
174 * Enable or disable bounce buffering for the device. Drives move
175 * between PIO and DMA and that changes the rules we need.
178 void ide_toggle_bounce(ide_drive_t *drive, int on)
180 u64 addr = BLK_BOUNCE_HIGH; /* dma64_addr_t */
182 if (!PCI_DMA_BUS_IS_PHYS) {
183 addr = BLK_BOUNCE_ANY;
184 } else if (on && drive->media == ide_disk) {
185 struct device *dev = drive->hwif->dev;
187 if (dev && dev->dma_mask)
188 addr = *dev->dma_mask;
192 blk_queue_bounce_limit(drive->queue, addr);
195 int ide_set_pio_mode(ide_drive_t *drive, const u8 mode)
197 ide_hwif_t *hwif = drive->hwif;
198 const struct ide_port_ops *port_ops = hwif->port_ops;
200 if (hwif->host_flags & IDE_HFLAG_NO_SET_MODE)
203 if (port_ops == NULL || port_ops->set_pio_mode == NULL)
207 * TODO: temporary hack for some legacy host drivers that didn't
208 * set transfer mode on the device in ->set_pio_mode method...
210 if (port_ops->set_dma_mode == NULL) {
211 port_ops->set_pio_mode(drive, mode - XFER_PIO_0);
215 if (hwif->host_flags & IDE_HFLAG_POST_SET_MODE) {
216 if (ide_config_drive_speed(drive, mode))
218 port_ops->set_pio_mode(drive, mode - XFER_PIO_0);
221 port_ops->set_pio_mode(drive, mode - XFER_PIO_0);
222 return ide_config_drive_speed(drive, mode);
226 int ide_set_dma_mode(ide_drive_t *drive, const u8 mode)
228 ide_hwif_t *hwif = drive->hwif;
229 const struct ide_port_ops *port_ops = hwif->port_ops;
231 if (hwif->host_flags & IDE_HFLAG_NO_SET_MODE)
234 if (port_ops == NULL || port_ops->set_dma_mode == NULL)
237 if (hwif->host_flags & IDE_HFLAG_POST_SET_MODE) {
238 if (ide_config_drive_speed(drive, mode))
240 port_ops->set_dma_mode(drive, mode);
243 port_ops->set_dma_mode(drive, mode);
244 return ide_config_drive_speed(drive, mode);
248 EXPORT_SYMBOL_GPL(ide_set_dma_mode);
251 * ide_set_xfer_rate - set transfer rate
252 * @drive: drive to set
253 * @rate: speed to attempt to set
255 * General helper for setting the speed of an IDE device. This
256 * function knows about user enforced limits from the configuration
257 * which ->set_pio_mode/->set_dma_mode does not.
260 int ide_set_xfer_rate(ide_drive_t *drive, u8 rate)
262 ide_hwif_t *hwif = drive->hwif;
263 const struct ide_port_ops *port_ops = hwif->port_ops;
265 if (port_ops == NULL || port_ops->set_dma_mode == NULL ||
266 (hwif->host_flags & IDE_HFLAG_NO_SET_MODE))
269 rate = ide_rate_filter(drive, rate);
271 BUG_ON(rate < XFER_PIO_0);
273 if (rate >= XFER_PIO_0 && rate <= XFER_PIO_5)
274 return ide_set_pio_mode(drive, rate);
276 return ide_set_dma_mode(drive, rate);
279 static void ide_dump_opcode(ide_drive_t *drive)
282 ide_task_t *task = NULL;
284 spin_lock(&ide_lock);
287 rq = HWGROUP(drive)->rq;
288 spin_unlock(&ide_lock);
292 if (rq->cmd_type == REQ_TYPE_ATA_TASKFILE)
295 printk("ide: failed opcode was: ");
297 printk(KERN_CONT "unknown\n");
299 printk(KERN_CONT "0x%02x\n", task->tf.command);
302 u64 ide_get_lba_addr(struct ide_taskfile *tf, int lba48)
307 high = (tf->hob_lbah << 16) | (tf->hob_lbam << 8) |
310 high = tf->device & 0xf;
311 low = (tf->lbah << 16) | (tf->lbam << 8) | tf->lbal;
313 return ((u64)high << 24) | low;
315 EXPORT_SYMBOL_GPL(ide_get_lba_addr);
317 static void ide_dump_sector(ide_drive_t *drive)
320 struct ide_taskfile *tf = &task.tf;
321 int lba48 = (drive->addressing == 1) ? 1 : 0;
323 memset(&task, 0, sizeof(task));
325 task.tf_flags = IDE_TFLAG_IN_LBA | IDE_TFLAG_IN_HOB_LBA |
328 task.tf_flags = IDE_TFLAG_IN_LBA | IDE_TFLAG_IN_DEVICE;
330 drive->hwif->tp_ops->tf_read(drive, &task);
332 if (lba48 || (tf->device & ATA_LBA))
333 printk(", LBAsect=%llu",
334 (unsigned long long)ide_get_lba_addr(tf, lba48));
336 printk(", CHS=%d/%d/%d", (tf->lbah << 8) + tf->lbam,
337 tf->device & 0xf, tf->lbal);
340 static void ide_dump_ata_error(ide_drive_t *drive, u8 err)
343 if (err & ATA_ABORTED) printk("DriveStatusError ");
345 printk((err & ATA_ABORTED) ? "BadCRC " : "BadSector ");
346 if (err & ATA_UNC) printk("UncorrectableError ");
347 if (err & ATA_IDNF) printk("SectorIdNotFound ");
348 if (err & ATA_TRK0NF) printk("TrackZeroNotFound ");
349 if (err & ATA_AMNF) printk("AddrMarkNotFound ");
351 if ((err & (ATA_BBK | ATA_ABORTED)) == ATA_BBK ||
352 (err & (ATA_UNC | ATA_IDNF | ATA_AMNF))) {
353 ide_dump_sector(drive);
354 if (HWGROUP(drive) && HWGROUP(drive)->rq)
355 printk(", sector=%llu",
356 (unsigned long long)HWGROUP(drive)->rq->sector);
361 static void ide_dump_atapi_error(ide_drive_t *drive, u8 err)
364 if (err & ATAPI_ILI) printk("IllegalLengthIndication ");
365 if (err & ATAPI_EOM) printk("EndOfMedia ");
366 if (err & ATA_ABORTED) printk("AbortedCommand ");
367 if (err & ATA_MCR) printk("MediaChangeRequested ");
368 if (err & ATAPI_LFS) printk("LastFailedSense=0x%02x ",
369 (err & ATAPI_LFS) >> 4);
374 * ide_dump_status - translate ATA/ATAPI error
375 * @drive: drive that status applies to
376 * @msg: text message to print
377 * @stat: status byte to decode
379 * Error reporting, in human readable form (luxurious, but a memory hog).
380 * Combines the drive name, message and status byte to provide a
381 * user understandable explanation of the device error.
384 u8 ide_dump_status(ide_drive_t *drive, const char *msg, u8 stat)
389 local_irq_save(flags);
390 printk("%s: %s: status=0x%02x { ", drive->name, msg, stat);
394 if (stat & ATA_DRDY) printk("DriveReady ");
395 if (stat & ATA_DF) printk("DeviceFault ");
396 if (stat & ATA_DSC) printk("SeekComplete ");
397 if (stat & ATA_DRQ) printk("DataRequest ");
398 if (stat & ATA_CORR) printk("CorrectedError ");
399 if (stat & ATA_IDX) printk("Index ");
400 if (stat & ATA_ERR) printk("Error ");
403 if ((stat & (ATA_BUSY | ATA_ERR)) == ATA_ERR) {
404 err = ide_read_error(drive);
405 printk("%s: %s: error=0x%02x ", drive->name, msg, err);
406 if (drive->media == ide_disk)
407 ide_dump_ata_error(drive, err);
409 ide_dump_atapi_error(drive, err);
411 ide_dump_opcode(drive);
412 local_irq_restore(flags);
416 EXPORT_SYMBOL(ide_dump_status);