1 #include <linux/types.h>
2 #include <linux/string.h>
3 #include <linux/kernel.h>
4 #include <linux/interrupt.h>
6 #include <linux/bitops.h>
8 static const char *udma_str[] =
9 { "UDMA/16", "UDMA/25", "UDMA/33", "UDMA/44",
10 "UDMA/66", "UDMA/100", "UDMA/133", "UDMA7" };
11 static const char *mwdma_str[] =
12 { "MWDMA0", "MWDMA1", "MWDMA2" };
13 static const char *swdma_str[] =
14 { "SWDMA0", "SWDMA1", "SWDMA2" };
15 static const char *pio_str[] =
16 { "PIO0", "PIO1", "PIO2", "PIO3", "PIO4", "PIO5" };
19 * ide_xfer_verbose - return IDE mode names
20 * @mode: transfer mode
22 * Returns a constant string giving the name of the mode
26 const char *ide_xfer_verbose(u8 mode)
31 if (mode >= XFER_UDMA_0 && mode <= XFER_UDMA_7)
33 else if (mode >= XFER_MW_DMA_0 && mode <= XFER_MW_DMA_2)
35 else if (mode >= XFER_SW_DMA_0 && mode <= XFER_SW_DMA_2)
37 else if (mode >= XFER_PIO_0 && mode <= XFER_PIO_5)
39 else if (mode == XFER_PIO_SLOW)
47 EXPORT_SYMBOL(ide_xfer_verbose);
50 * ide_rate_filter - filter transfer mode
52 * @speed: desired speed
54 * Given the available transfer modes this function returns
55 * the best available speed at or below the speed requested.
57 * TODO: check device PIO capabilities
60 static u8 ide_rate_filter(ide_drive_t *drive, u8 speed)
62 ide_hwif_t *hwif = drive->hwif;
63 u8 mode = ide_find_dma_mode(drive, speed);
67 mode = fls(hwif->pio_mask) - 1 + XFER_PIO_0;
72 /* printk("%s: mode 0x%02x, speed 0x%02x\n", __func__, mode, speed); */
74 return min(speed, mode);
78 * ide_get_best_pio_mode - get PIO mode from drive
79 * @drive: drive to consider
80 * @mode_wanted: preferred mode
81 * @max_mode: highest allowed mode
83 * This routine returns the recommended PIO settings for a given drive,
84 * based on the drive->id information and the ide_pio_blacklist[].
86 * Drive PIO mode is auto-selected if 255 is passed as mode_wanted.
87 * This is used by most chipset support modules when "auto-tuning".
90 u8 ide_get_best_pio_mode (ide_drive_t *drive, u8 mode_wanted, u8 max_mode)
93 int pio_mode = -1, overridden = 0;
95 if (mode_wanted != 255)
96 return min_t(u8, mode_wanted, max_mode);
98 if ((drive->hwif->host_flags & IDE_HFLAG_PIO_NO_BLACKLIST) == 0)
99 pio_mode = ide_scan_pio_blacklist((char *)&id[ATA_ID_PROD]);
101 if (pio_mode != -1) {
102 printk(KERN_INFO "%s: is on PIO blacklist\n", drive->name);
104 pio_mode = id[ATA_ID_OLD_PIO_MODES] >> 8;
105 if (pio_mode > 2) { /* 2 is maximum allowed tPIO value */
110 if (id[ATA_ID_FIELD_VALID] & 2) { /* ATA2? */
111 if (ata_id_has_iordy(id)) {
112 if (id[ATA_ID_PIO_MODES] & 7) {
114 if (id[ATA_ID_PIO_MODES] & 4)
116 else if (id[ATA_ID_PIO_MODES] & 2)
125 printk(KERN_INFO "%s: tPIO > 2, assuming tPIO = 2\n",
129 if (pio_mode > max_mode)
135 EXPORT_SYMBOL_GPL(ide_get_best_pio_mode);
137 /* req_pio == "255" for auto-tune */
138 void ide_set_pio(ide_drive_t *drive, u8 req_pio)
140 ide_hwif_t *hwif = drive->hwif;
141 const struct ide_port_ops *port_ops = hwif->port_ops;
144 if (port_ops == NULL || port_ops->set_pio_mode == NULL ||
145 (hwif->host_flags & IDE_HFLAG_NO_SET_MODE))
148 BUG_ON(hwif->pio_mask == 0x00);
150 host_pio = fls(hwif->pio_mask) - 1;
152 pio = ide_get_best_pio_mode(drive, req_pio, host_pio);
156 * - report device max PIO mode
157 * - check req_pio != 255 against device max PIO mode
159 printk(KERN_DEBUG "%s: host max PIO%d wanted PIO%d%s selected PIO%d\n",
160 drive->name, host_pio, req_pio,
161 req_pio == 255 ? "(auto-tune)" : "", pio);
163 (void)ide_set_pio_mode(drive, XFER_PIO_0 + pio);
166 EXPORT_SYMBOL_GPL(ide_set_pio);
169 * ide_toggle_bounce - handle bounce buffering
170 * @drive: drive to update
171 * @on: on/off boolean
173 * Enable or disable bounce buffering for the device. Drives move
174 * between PIO and DMA and that changes the rules we need.
177 void ide_toggle_bounce(ide_drive_t *drive, int on)
179 u64 addr = BLK_BOUNCE_HIGH; /* dma64_addr_t */
181 if (!PCI_DMA_BUS_IS_PHYS) {
182 addr = BLK_BOUNCE_ANY;
183 } else if (on && drive->media == ide_disk) {
184 struct device *dev = drive->hwif->dev;
186 if (dev && dev->dma_mask)
187 addr = *dev->dma_mask;
191 blk_queue_bounce_limit(drive->queue, addr);
194 int ide_set_pio_mode(ide_drive_t *drive, const u8 mode)
196 ide_hwif_t *hwif = drive->hwif;
197 const struct ide_port_ops *port_ops = hwif->port_ops;
199 if (hwif->host_flags & IDE_HFLAG_NO_SET_MODE)
202 if (port_ops == NULL || port_ops->set_pio_mode == NULL)
206 * TODO: temporary hack for some legacy host drivers that didn't
207 * set transfer mode on the device in ->set_pio_mode method...
209 if (port_ops->set_dma_mode == NULL) {
210 port_ops->set_pio_mode(drive, mode - XFER_PIO_0);
214 if (hwif->host_flags & IDE_HFLAG_POST_SET_MODE) {
215 if (ide_config_drive_speed(drive, mode))
217 port_ops->set_pio_mode(drive, mode - XFER_PIO_0);
220 port_ops->set_pio_mode(drive, mode - XFER_PIO_0);
221 return ide_config_drive_speed(drive, mode);
225 int ide_set_dma_mode(ide_drive_t *drive, const u8 mode)
227 ide_hwif_t *hwif = drive->hwif;
228 const struct ide_port_ops *port_ops = hwif->port_ops;
230 if (hwif->host_flags & IDE_HFLAG_NO_SET_MODE)
233 if (port_ops == NULL || port_ops->set_dma_mode == NULL)
236 if (hwif->host_flags & IDE_HFLAG_POST_SET_MODE) {
237 if (ide_config_drive_speed(drive, mode))
239 port_ops->set_dma_mode(drive, mode);
242 port_ops->set_dma_mode(drive, mode);
243 return ide_config_drive_speed(drive, mode);
247 EXPORT_SYMBOL_GPL(ide_set_dma_mode);
250 * ide_set_xfer_rate - set transfer rate
251 * @drive: drive to set
252 * @rate: speed to attempt to set
254 * General helper for setting the speed of an IDE device. This
255 * function knows about user enforced limits from the configuration
256 * which ->set_pio_mode/->set_dma_mode does not.
259 int ide_set_xfer_rate(ide_drive_t *drive, u8 rate)
261 ide_hwif_t *hwif = drive->hwif;
262 const struct ide_port_ops *port_ops = hwif->port_ops;
264 if (port_ops == NULL || port_ops->set_dma_mode == NULL ||
265 (hwif->host_flags & IDE_HFLAG_NO_SET_MODE))
268 rate = ide_rate_filter(drive, rate);
270 BUG_ON(rate < XFER_PIO_0);
272 if (rate >= XFER_PIO_0 && rate <= XFER_PIO_5)
273 return ide_set_pio_mode(drive, rate);
275 return ide_set_dma_mode(drive, rate);
278 static void ide_dump_opcode(ide_drive_t *drive)
281 ide_task_t *task = NULL;
283 spin_lock(&ide_lock);
286 rq = HWGROUP(drive)->rq;
287 spin_unlock(&ide_lock);
291 if (rq->cmd_type == REQ_TYPE_ATA_TASKFILE)
294 printk("ide: failed opcode was: ");
296 printk(KERN_CONT "unknown\n");
298 printk(KERN_CONT "0x%02x\n", task->tf.command);
301 u64 ide_get_lba_addr(struct ide_taskfile *tf, int lba48)
306 high = (tf->hob_lbah << 16) | (tf->hob_lbam << 8) |
309 high = tf->device & 0xf;
310 low = (tf->lbah << 16) | (tf->lbam << 8) | tf->lbal;
312 return ((u64)high << 24) | low;
314 EXPORT_SYMBOL_GPL(ide_get_lba_addr);
316 static void ide_dump_sector(ide_drive_t *drive)
319 struct ide_taskfile *tf = &task.tf;
320 int lba48 = (drive->addressing == 1) ? 1 : 0;
322 memset(&task, 0, sizeof(task));
324 task.tf_flags = IDE_TFLAG_IN_LBA | IDE_TFLAG_IN_HOB_LBA |
327 task.tf_flags = IDE_TFLAG_IN_LBA | IDE_TFLAG_IN_DEVICE;
329 drive->hwif->tp_ops->tf_read(drive, &task);
331 if (lba48 || (tf->device & ATA_LBA))
332 printk(", LBAsect=%llu",
333 (unsigned long long)ide_get_lba_addr(tf, lba48));
335 printk(", CHS=%d/%d/%d", (tf->lbah << 8) + tf->lbam,
336 tf->device & 0xf, tf->lbal);
339 static void ide_dump_ata_error(ide_drive_t *drive, u8 err)
342 if (err & ATA_ABORTED) printk("DriveStatusError ");
344 printk((err & ATA_ABORTED) ? "BadCRC " : "BadSector ");
345 if (err & ATA_UNC) printk("UncorrectableError ");
346 if (err & ATA_IDNF) printk("SectorIdNotFound ");
347 if (err & ATA_TRK0NF) printk("TrackZeroNotFound ");
348 if (err & ATA_AMNF) printk("AddrMarkNotFound ");
350 if ((err & (ATA_BBK | ATA_ABORTED)) == ATA_BBK ||
351 (err & (ATA_UNC | ATA_IDNF | ATA_AMNF))) {
352 ide_dump_sector(drive);
353 if (HWGROUP(drive) && HWGROUP(drive)->rq)
354 printk(", sector=%llu",
355 (unsigned long long)HWGROUP(drive)->rq->sector);
360 static void ide_dump_atapi_error(ide_drive_t *drive, u8 err)
363 if (err & ATAPI_ILI) printk("IllegalLengthIndication ");
364 if (err & ATAPI_EOM) printk("EndOfMedia ");
365 if (err & ATA_ABORTED) printk("AbortedCommand ");
366 if (err & ATA_MCR) printk("MediaChangeRequested ");
367 if (err & ATAPI_LFS) printk("LastFailedSense=0x%02x ",
368 (err & ATAPI_LFS) >> 4);
373 * ide_dump_status - translate ATA/ATAPI error
374 * @drive: drive that status applies to
375 * @msg: text message to print
376 * @stat: status byte to decode
378 * Error reporting, in human readable form (luxurious, but a memory hog).
379 * Combines the drive name, message and status byte to provide a
380 * user understandable explanation of the device error.
383 u8 ide_dump_status(ide_drive_t *drive, const char *msg, u8 stat)
388 local_irq_save(flags);
389 printk("%s: %s: status=0x%02x { ", drive->name, msg, stat);
393 if (stat & ATA_DRDY) printk("DriveReady ");
394 if (stat & ATA_DF) printk("DeviceFault ");
395 if (stat & ATA_DSC) printk("SeekComplete ");
396 if (stat & ATA_DRQ) printk("DataRequest ");
397 if (stat & ATA_CORR) printk("CorrectedError ");
398 if (stat & ATA_IDX) printk("Index ");
399 if (stat & ATA_ERR) printk("Error ");
402 if ((stat & (ATA_BUSY | ATA_ERR)) == ATA_ERR) {
403 err = ide_read_error(drive);
404 printk("%s: %s: error=0x%02x ", drive->name, msg, err);
405 if (drive->media == ide_disk)
406 ide_dump_ata_error(drive, err);
408 ide_dump_atapi_error(drive, err);
410 ide_dump_opcode(drive);
411 local_irq_restore(flags);
415 EXPORT_SYMBOL(ide_dump_status);