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1 | /* | |
2 | * libata-core.c - helper library for ATA | |
3 | * | |
4 | * Maintained by: Jeff Garzik <jgarzik@pobox.com> | |
5 | * Please ALWAYS copy linux-ide@vger.kernel.org | |
6 | * on emails. | |
7 | * | |
8 | * Copyright 2003-2004 Red Hat, Inc. All rights reserved. | |
9 | * Copyright 2003-2004 Jeff Garzik | |
10 | * | |
11 | * | |
12 | * This program is free software; you can redistribute it and/or modify | |
13 | * it under the terms of the GNU General Public License as published by | |
14 | * the Free Software Foundation; either version 2, or (at your option) | |
15 | * any later version. | |
16 | * | |
17 | * This program is distributed in the hope that it will be useful, | |
18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
20 | * GNU General Public License for more details. | |
21 | * | |
22 | * You should have received a copy of the GNU General Public License | |
23 | * along with this program; see the file COPYING. If not, write to | |
24 | * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. | |
25 | * | |
26 | * | |
27 | * libata documentation is available via 'make {ps|pdf}docs', | |
28 | * as Documentation/DocBook/libata.* | |
29 | * | |
30 | * Hardware documentation available from http://www.t13.org/ and | |
31 | * http://www.sata-io.org/ | |
32 | * | |
33 | */ | |
34 | ||
35 | #include <linux/kernel.h> | |
36 | #include <linux/module.h> | |
37 | #include <linux/pci.h> | |
38 | #include <linux/init.h> | |
39 | #include <linux/list.h> | |
40 | #include <linux/mm.h> | |
41 | #include <linux/highmem.h> | |
42 | #include <linux/spinlock.h> | |
43 | #include <linux/blkdev.h> | |
44 | #include <linux/delay.h> | |
45 | #include <linux/timer.h> | |
46 | #include <linux/interrupt.h> | |
47 | #include <linux/completion.h> | |
48 | #include <linux/suspend.h> | |
49 | #include <linux/workqueue.h> | |
50 | #include <linux/jiffies.h> | |
51 | #include <linux/scatterlist.h> | |
52 | #include <scsi/scsi.h> | |
53 | #include <scsi/scsi_cmnd.h> | |
54 | #include <scsi/scsi_host.h> | |
55 | #include <linux/libata.h> | |
56 | #include <asm/io.h> | |
57 | #include <asm/semaphore.h> | |
58 | #include <asm/byteorder.h> | |
59 | ||
60 | #include "libata.h" | |
61 | ||
62 | #define DRV_VERSION "2.21" /* must be exactly four chars */ | |
63 | ||
64 | ||
65 | /* debounce timing parameters in msecs { interval, duration, timeout } */ | |
66 | const unsigned long sata_deb_timing_normal[] = { 5, 100, 2000 }; | |
67 | const unsigned long sata_deb_timing_hotplug[] = { 25, 500, 2000 }; | |
68 | const unsigned long sata_deb_timing_long[] = { 100, 2000, 5000 }; | |
69 | ||
70 | static unsigned int ata_dev_init_params(struct ata_device *dev, | |
71 | u16 heads, u16 sectors); | |
72 | static unsigned int ata_dev_set_xfermode(struct ata_device *dev); | |
73 | static void ata_dev_xfermask(struct ata_device *dev); | |
74 | static unsigned long ata_dev_blacklisted(const struct ata_device *dev); | |
75 | ||
76 | unsigned int ata_print_id = 1; | |
77 | static struct workqueue_struct *ata_wq; | |
78 | ||
79 | struct workqueue_struct *ata_aux_wq; | |
80 | ||
81 | int atapi_enabled = 1; | |
82 | module_param(atapi_enabled, int, 0444); | |
83 | MODULE_PARM_DESC(atapi_enabled, "Enable discovery of ATAPI devices (0=off, 1=on)"); | |
84 | ||
85 | int atapi_dmadir = 0; | |
86 | module_param(atapi_dmadir, int, 0444); | |
87 | MODULE_PARM_DESC(atapi_dmadir, "Enable ATAPI DMADIR bridge support (0=off, 1=on)"); | |
88 | ||
89 | int libata_fua = 0; | |
90 | module_param_named(fua, libata_fua, int, 0444); | |
91 | MODULE_PARM_DESC(fua, "FUA support (0=off, 1=on)"); | |
92 | ||
93 | static int ata_ignore_hpa = 0; | |
94 | module_param_named(ignore_hpa, ata_ignore_hpa, int, 0644); | |
95 | MODULE_PARM_DESC(ignore_hpa, "Ignore HPA limit (0=keep BIOS limits, 1=ignore limits, using full disk)"); | |
96 | ||
97 | static int ata_probe_timeout = ATA_TMOUT_INTERNAL / HZ; | |
98 | module_param(ata_probe_timeout, int, 0444); | |
99 | MODULE_PARM_DESC(ata_probe_timeout, "Set ATA probing timeout (seconds)"); | |
100 | ||
101 | int libata_noacpi = 1; | |
102 | module_param_named(noacpi, libata_noacpi, int, 0444); | |
103 | MODULE_PARM_DESC(noacpi, "Disables the use of ACPI in suspend/resume when set"); | |
104 | ||
105 | MODULE_AUTHOR("Jeff Garzik"); | |
106 | MODULE_DESCRIPTION("Library module for ATA devices"); | |
107 | MODULE_LICENSE("GPL"); | |
108 | MODULE_VERSION(DRV_VERSION); | |
109 | ||
110 | ||
111 | /** | |
112 | * ata_tf_to_fis - Convert ATA taskfile to SATA FIS structure | |
113 | * @tf: Taskfile to convert | |
114 | * @pmp: Port multiplier port | |
115 | * @is_cmd: This FIS is for command | |
116 | * @fis: Buffer into which data will output | |
117 | * | |
118 | * Converts a standard ATA taskfile to a Serial ATA | |
119 | * FIS structure (Register - Host to Device). | |
120 | * | |
121 | * LOCKING: | |
122 | * Inherited from caller. | |
123 | */ | |
124 | void ata_tf_to_fis(const struct ata_taskfile *tf, u8 pmp, int is_cmd, u8 *fis) | |
125 | { | |
126 | fis[0] = 0x27; /* Register - Host to Device FIS */ | |
127 | fis[1] = pmp & 0xf; /* Port multiplier number*/ | |
128 | if (is_cmd) | |
129 | fis[1] |= (1 << 7); /* bit 7 indicates Command FIS */ | |
130 | ||
131 | fis[2] = tf->command; | |
132 | fis[3] = tf->feature; | |
133 | ||
134 | fis[4] = tf->lbal; | |
135 | fis[5] = tf->lbam; | |
136 | fis[6] = tf->lbah; | |
137 | fis[7] = tf->device; | |
138 | ||
139 | fis[8] = tf->hob_lbal; | |
140 | fis[9] = tf->hob_lbam; | |
141 | fis[10] = tf->hob_lbah; | |
142 | fis[11] = tf->hob_feature; | |
143 | ||
144 | fis[12] = tf->nsect; | |
145 | fis[13] = tf->hob_nsect; | |
146 | fis[14] = 0; | |
147 | fis[15] = tf->ctl; | |
148 | ||
149 | fis[16] = 0; | |
150 | fis[17] = 0; | |
151 | fis[18] = 0; | |
152 | fis[19] = 0; | |
153 | } | |
154 | ||
155 | /** | |
156 | * ata_tf_from_fis - Convert SATA FIS to ATA taskfile | |
157 | * @fis: Buffer from which data will be input | |
158 | * @tf: Taskfile to output | |
159 | * | |
160 | * Converts a serial ATA FIS structure to a standard ATA taskfile. | |
161 | * | |
162 | * LOCKING: | |
163 | * Inherited from caller. | |
164 | */ | |
165 | ||
166 | void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf) | |
167 | { | |
168 | tf->command = fis[2]; /* status */ | |
169 | tf->feature = fis[3]; /* error */ | |
170 | ||
171 | tf->lbal = fis[4]; | |
172 | tf->lbam = fis[5]; | |
173 | tf->lbah = fis[6]; | |
174 | tf->device = fis[7]; | |
175 | ||
176 | tf->hob_lbal = fis[8]; | |
177 | tf->hob_lbam = fis[9]; | |
178 | tf->hob_lbah = fis[10]; | |
179 | ||
180 | tf->nsect = fis[12]; | |
181 | tf->hob_nsect = fis[13]; | |
182 | } | |
183 | ||
184 | static const u8 ata_rw_cmds[] = { | |
185 | /* pio multi */ | |
186 | ATA_CMD_READ_MULTI, | |
187 | ATA_CMD_WRITE_MULTI, | |
188 | ATA_CMD_READ_MULTI_EXT, | |
189 | ATA_CMD_WRITE_MULTI_EXT, | |
190 | 0, | |
191 | 0, | |
192 | 0, | |
193 | ATA_CMD_WRITE_MULTI_FUA_EXT, | |
194 | /* pio */ | |
195 | ATA_CMD_PIO_READ, | |
196 | ATA_CMD_PIO_WRITE, | |
197 | ATA_CMD_PIO_READ_EXT, | |
198 | ATA_CMD_PIO_WRITE_EXT, | |
199 | 0, | |
200 | 0, | |
201 | 0, | |
202 | 0, | |
203 | /* dma */ | |
204 | ATA_CMD_READ, | |
205 | ATA_CMD_WRITE, | |
206 | ATA_CMD_READ_EXT, | |
207 | ATA_CMD_WRITE_EXT, | |
208 | 0, | |
209 | 0, | |
210 | 0, | |
211 | ATA_CMD_WRITE_FUA_EXT | |
212 | }; | |
213 | ||
214 | /** | |
215 | * ata_rwcmd_protocol - set taskfile r/w commands and protocol | |
216 | * @tf: command to examine and configure | |
217 | * @dev: device tf belongs to | |
218 | * | |
219 | * Examine the device configuration and tf->flags to calculate | |
220 | * the proper read/write commands and protocol to use. | |
221 | * | |
222 | * LOCKING: | |
223 | * caller. | |
224 | */ | |
225 | static int ata_rwcmd_protocol(struct ata_taskfile *tf, struct ata_device *dev) | |
226 | { | |
227 | u8 cmd; | |
228 | ||
229 | int index, fua, lba48, write; | |
230 | ||
231 | fua = (tf->flags & ATA_TFLAG_FUA) ? 4 : 0; | |
232 | lba48 = (tf->flags & ATA_TFLAG_LBA48) ? 2 : 0; | |
233 | write = (tf->flags & ATA_TFLAG_WRITE) ? 1 : 0; | |
234 | ||
235 | if (dev->flags & ATA_DFLAG_PIO) { | |
236 | tf->protocol = ATA_PROT_PIO; | |
237 | index = dev->multi_count ? 0 : 8; | |
238 | } else if (lba48 && (dev->link->ap->flags & ATA_FLAG_PIO_LBA48)) { | |
239 | /* Unable to use DMA due to host limitation */ | |
240 | tf->protocol = ATA_PROT_PIO; | |
241 | index = dev->multi_count ? 0 : 8; | |
242 | } else { | |
243 | tf->protocol = ATA_PROT_DMA; | |
244 | index = 16; | |
245 | } | |
246 | ||
247 | cmd = ata_rw_cmds[index + fua + lba48 + write]; | |
248 | if (cmd) { | |
249 | tf->command = cmd; | |
250 | return 0; | |
251 | } | |
252 | return -1; | |
253 | } | |
254 | ||
255 | /** | |
256 | * ata_tf_read_block - Read block address from ATA taskfile | |
257 | * @tf: ATA taskfile of interest | |
258 | * @dev: ATA device @tf belongs to | |
259 | * | |
260 | * LOCKING: | |
261 | * None. | |
262 | * | |
263 | * Read block address from @tf. This function can handle all | |
264 | * three address formats - LBA, LBA48 and CHS. tf->protocol and | |
265 | * flags select the address format to use. | |
266 | * | |
267 | * RETURNS: | |
268 | * Block address read from @tf. | |
269 | */ | |
270 | u64 ata_tf_read_block(struct ata_taskfile *tf, struct ata_device *dev) | |
271 | { | |
272 | u64 block = 0; | |
273 | ||
274 | if (tf->flags & ATA_TFLAG_LBA) { | |
275 | if (tf->flags & ATA_TFLAG_LBA48) { | |
276 | block |= (u64)tf->hob_lbah << 40; | |
277 | block |= (u64)tf->hob_lbam << 32; | |
278 | block |= tf->hob_lbal << 24; | |
279 | } else | |
280 | block |= (tf->device & 0xf) << 24; | |
281 | ||
282 | block |= tf->lbah << 16; | |
283 | block |= tf->lbam << 8; | |
284 | block |= tf->lbal; | |
285 | } else { | |
286 | u32 cyl, head, sect; | |
287 | ||
288 | cyl = tf->lbam | (tf->lbah << 8); | |
289 | head = tf->device & 0xf; | |
290 | sect = tf->lbal; | |
291 | ||
292 | block = (cyl * dev->heads + head) * dev->sectors + sect; | |
293 | } | |
294 | ||
295 | return block; | |
296 | } | |
297 | ||
298 | /** | |
299 | * ata_build_rw_tf - Build ATA taskfile for given read/write request | |
300 | * @tf: Target ATA taskfile | |
301 | * @dev: ATA device @tf belongs to | |
302 | * @block: Block address | |
303 | * @n_block: Number of blocks | |
304 | * @tf_flags: RW/FUA etc... | |
305 | * @tag: tag | |
306 | * | |
307 | * LOCKING: | |
308 | * None. | |
309 | * | |
310 | * Build ATA taskfile @tf for read/write request described by | |
311 | * @block, @n_block, @tf_flags and @tag on @dev. | |
312 | * | |
313 | * RETURNS: | |
314 | * | |
315 | * 0 on success, -ERANGE if the request is too large for @dev, | |
316 | * -EINVAL if the request is invalid. | |
317 | */ | |
318 | int ata_build_rw_tf(struct ata_taskfile *tf, struct ata_device *dev, | |
319 | u64 block, u32 n_block, unsigned int tf_flags, | |
320 | unsigned int tag) | |
321 | { | |
322 | tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
323 | tf->flags |= tf_flags; | |
324 | ||
325 | if (ata_ncq_enabled(dev) && likely(tag != ATA_TAG_INTERNAL)) { | |
326 | /* yay, NCQ */ | |
327 | if (!lba_48_ok(block, n_block)) | |
328 | return -ERANGE; | |
329 | ||
330 | tf->protocol = ATA_PROT_NCQ; | |
331 | tf->flags |= ATA_TFLAG_LBA | ATA_TFLAG_LBA48; | |
332 | ||
333 | if (tf->flags & ATA_TFLAG_WRITE) | |
334 | tf->command = ATA_CMD_FPDMA_WRITE; | |
335 | else | |
336 | tf->command = ATA_CMD_FPDMA_READ; | |
337 | ||
338 | tf->nsect = tag << 3; | |
339 | tf->hob_feature = (n_block >> 8) & 0xff; | |
340 | tf->feature = n_block & 0xff; | |
341 | ||
342 | tf->hob_lbah = (block >> 40) & 0xff; | |
343 | tf->hob_lbam = (block >> 32) & 0xff; | |
344 | tf->hob_lbal = (block >> 24) & 0xff; | |
345 | tf->lbah = (block >> 16) & 0xff; | |
346 | tf->lbam = (block >> 8) & 0xff; | |
347 | tf->lbal = block & 0xff; | |
348 | ||
349 | tf->device = 1 << 6; | |
350 | if (tf->flags & ATA_TFLAG_FUA) | |
351 | tf->device |= 1 << 7; | |
352 | } else if (dev->flags & ATA_DFLAG_LBA) { | |
353 | tf->flags |= ATA_TFLAG_LBA; | |
354 | ||
355 | if (lba_28_ok(block, n_block)) { | |
356 | /* use LBA28 */ | |
357 | tf->device |= (block >> 24) & 0xf; | |
358 | } else if (lba_48_ok(block, n_block)) { | |
359 | if (!(dev->flags & ATA_DFLAG_LBA48)) | |
360 | return -ERANGE; | |
361 | ||
362 | /* use LBA48 */ | |
363 | tf->flags |= ATA_TFLAG_LBA48; | |
364 | ||
365 | tf->hob_nsect = (n_block >> 8) & 0xff; | |
366 | ||
367 | tf->hob_lbah = (block >> 40) & 0xff; | |
368 | tf->hob_lbam = (block >> 32) & 0xff; | |
369 | tf->hob_lbal = (block >> 24) & 0xff; | |
370 | } else | |
371 | /* request too large even for LBA48 */ | |
372 | return -ERANGE; | |
373 | ||
374 | if (unlikely(ata_rwcmd_protocol(tf, dev) < 0)) | |
375 | return -EINVAL; | |
376 | ||
377 | tf->nsect = n_block & 0xff; | |
378 | ||
379 | tf->lbah = (block >> 16) & 0xff; | |
380 | tf->lbam = (block >> 8) & 0xff; | |
381 | tf->lbal = block & 0xff; | |
382 | ||
383 | tf->device |= ATA_LBA; | |
384 | } else { | |
385 | /* CHS */ | |
386 | u32 sect, head, cyl, track; | |
387 | ||
388 | /* The request -may- be too large for CHS addressing. */ | |
389 | if (!lba_28_ok(block, n_block)) | |
390 | return -ERANGE; | |
391 | ||
392 | if (unlikely(ata_rwcmd_protocol(tf, dev) < 0)) | |
393 | return -EINVAL; | |
394 | ||
395 | /* Convert LBA to CHS */ | |
396 | track = (u32)block / dev->sectors; | |
397 | cyl = track / dev->heads; | |
398 | head = track % dev->heads; | |
399 | sect = (u32)block % dev->sectors + 1; | |
400 | ||
401 | DPRINTK("block %u track %u cyl %u head %u sect %u\n", | |
402 | (u32)block, track, cyl, head, sect); | |
403 | ||
404 | /* Check whether the converted CHS can fit. | |
405 | Cylinder: 0-65535 | |
406 | Head: 0-15 | |
407 | Sector: 1-255*/ | |
408 | if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect)) | |
409 | return -ERANGE; | |
410 | ||
411 | tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */ | |
412 | tf->lbal = sect; | |
413 | tf->lbam = cyl; | |
414 | tf->lbah = cyl >> 8; | |
415 | tf->device |= head; | |
416 | } | |
417 | ||
418 | return 0; | |
419 | } | |
420 | ||
421 | /** | |
422 | * ata_pack_xfermask - Pack pio, mwdma and udma masks into xfer_mask | |
423 | * @pio_mask: pio_mask | |
424 | * @mwdma_mask: mwdma_mask | |
425 | * @udma_mask: udma_mask | |
426 | * | |
427 | * Pack @pio_mask, @mwdma_mask and @udma_mask into a single | |
428 | * unsigned int xfer_mask. | |
429 | * | |
430 | * LOCKING: | |
431 | * None. | |
432 | * | |
433 | * RETURNS: | |
434 | * Packed xfer_mask. | |
435 | */ | |
436 | static unsigned int ata_pack_xfermask(unsigned int pio_mask, | |
437 | unsigned int mwdma_mask, | |
438 | unsigned int udma_mask) | |
439 | { | |
440 | return ((pio_mask << ATA_SHIFT_PIO) & ATA_MASK_PIO) | | |
441 | ((mwdma_mask << ATA_SHIFT_MWDMA) & ATA_MASK_MWDMA) | | |
442 | ((udma_mask << ATA_SHIFT_UDMA) & ATA_MASK_UDMA); | |
443 | } | |
444 | ||
445 | /** | |
446 | * ata_unpack_xfermask - Unpack xfer_mask into pio, mwdma and udma masks | |
447 | * @xfer_mask: xfer_mask to unpack | |
448 | * @pio_mask: resulting pio_mask | |
449 | * @mwdma_mask: resulting mwdma_mask | |
450 | * @udma_mask: resulting udma_mask | |
451 | * | |
452 | * Unpack @xfer_mask into @pio_mask, @mwdma_mask and @udma_mask. | |
453 | * Any NULL distination masks will be ignored. | |
454 | */ | |
455 | static void ata_unpack_xfermask(unsigned int xfer_mask, | |
456 | unsigned int *pio_mask, | |
457 | unsigned int *mwdma_mask, | |
458 | unsigned int *udma_mask) | |
459 | { | |
460 | if (pio_mask) | |
461 | *pio_mask = (xfer_mask & ATA_MASK_PIO) >> ATA_SHIFT_PIO; | |
462 | if (mwdma_mask) | |
463 | *mwdma_mask = (xfer_mask & ATA_MASK_MWDMA) >> ATA_SHIFT_MWDMA; | |
464 | if (udma_mask) | |
465 | *udma_mask = (xfer_mask & ATA_MASK_UDMA) >> ATA_SHIFT_UDMA; | |
466 | } | |
467 | ||
468 | static const struct ata_xfer_ent { | |
469 | int shift, bits; | |
470 | u8 base; | |
471 | } ata_xfer_tbl[] = { | |
472 | { ATA_SHIFT_PIO, ATA_BITS_PIO, XFER_PIO_0 }, | |
473 | { ATA_SHIFT_MWDMA, ATA_BITS_MWDMA, XFER_MW_DMA_0 }, | |
474 | { ATA_SHIFT_UDMA, ATA_BITS_UDMA, XFER_UDMA_0 }, | |
475 | { -1, }, | |
476 | }; | |
477 | ||
478 | /** | |
479 | * ata_xfer_mask2mode - Find matching XFER_* for the given xfer_mask | |
480 | * @xfer_mask: xfer_mask of interest | |
481 | * | |
482 | * Return matching XFER_* value for @xfer_mask. Only the highest | |
483 | * bit of @xfer_mask is considered. | |
484 | * | |
485 | * LOCKING: | |
486 | * None. | |
487 | * | |
488 | * RETURNS: | |
489 | * Matching XFER_* value, 0 if no match found. | |
490 | */ | |
491 | static u8 ata_xfer_mask2mode(unsigned int xfer_mask) | |
492 | { | |
493 | int highbit = fls(xfer_mask) - 1; | |
494 | const struct ata_xfer_ent *ent; | |
495 | ||
496 | for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) | |
497 | if (highbit >= ent->shift && highbit < ent->shift + ent->bits) | |
498 | return ent->base + highbit - ent->shift; | |
499 | return 0; | |
500 | } | |
501 | ||
502 | /** | |
503 | * ata_xfer_mode2mask - Find matching xfer_mask for XFER_* | |
504 | * @xfer_mode: XFER_* of interest | |
505 | * | |
506 | * Return matching xfer_mask for @xfer_mode. | |
507 | * | |
508 | * LOCKING: | |
509 | * None. | |
510 | * | |
511 | * RETURNS: | |
512 | * Matching xfer_mask, 0 if no match found. | |
513 | */ | |
514 | static unsigned int ata_xfer_mode2mask(u8 xfer_mode) | |
515 | { | |
516 | const struct ata_xfer_ent *ent; | |
517 | ||
518 | for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) | |
519 | if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits) | |
520 | return 1 << (ent->shift + xfer_mode - ent->base); | |
521 | return 0; | |
522 | } | |
523 | ||
524 | /** | |
525 | * ata_xfer_mode2shift - Find matching xfer_shift for XFER_* | |
526 | * @xfer_mode: XFER_* of interest | |
527 | * | |
528 | * Return matching xfer_shift for @xfer_mode. | |
529 | * | |
530 | * LOCKING: | |
531 | * None. | |
532 | * | |
533 | * RETURNS: | |
534 | * Matching xfer_shift, -1 if no match found. | |
535 | */ | |
536 | static int ata_xfer_mode2shift(unsigned int xfer_mode) | |
537 | { | |
538 | const struct ata_xfer_ent *ent; | |
539 | ||
540 | for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) | |
541 | if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits) | |
542 | return ent->shift; | |
543 | return -1; | |
544 | } | |
545 | ||
546 | /** | |
547 | * ata_mode_string - convert xfer_mask to string | |
548 | * @xfer_mask: mask of bits supported; only highest bit counts. | |
549 | * | |
550 | * Determine string which represents the highest speed | |
551 | * (highest bit in @modemask). | |
552 | * | |
553 | * LOCKING: | |
554 | * None. | |
555 | * | |
556 | * RETURNS: | |
557 | * Constant C string representing highest speed listed in | |
558 | * @mode_mask, or the constant C string "<n/a>". | |
559 | */ | |
560 | static const char *ata_mode_string(unsigned int xfer_mask) | |
561 | { | |
562 | static const char * const xfer_mode_str[] = { | |
563 | "PIO0", | |
564 | "PIO1", | |
565 | "PIO2", | |
566 | "PIO3", | |
567 | "PIO4", | |
568 | "PIO5", | |
569 | "PIO6", | |
570 | "MWDMA0", | |
571 | "MWDMA1", | |
572 | "MWDMA2", | |
573 | "MWDMA3", | |
574 | "MWDMA4", | |
575 | "UDMA/16", | |
576 | "UDMA/25", | |
577 | "UDMA/33", | |
578 | "UDMA/44", | |
579 | "UDMA/66", | |
580 | "UDMA/100", | |
581 | "UDMA/133", | |
582 | "UDMA7", | |
583 | }; | |
584 | int highbit; | |
585 | ||
586 | highbit = fls(xfer_mask) - 1; | |
587 | if (highbit >= 0 && highbit < ARRAY_SIZE(xfer_mode_str)) | |
588 | return xfer_mode_str[highbit]; | |
589 | return "<n/a>"; | |
590 | } | |
591 | ||
592 | static const char *sata_spd_string(unsigned int spd) | |
593 | { | |
594 | static const char * const spd_str[] = { | |
595 | "1.5 Gbps", | |
596 | "3.0 Gbps", | |
597 | }; | |
598 | ||
599 | if (spd == 0 || (spd - 1) >= ARRAY_SIZE(spd_str)) | |
600 | return "<unknown>"; | |
601 | return spd_str[spd - 1]; | |
602 | } | |
603 | ||
604 | void ata_dev_disable(struct ata_device *dev) | |
605 | { | |
606 | if (ata_dev_enabled(dev)) { | |
607 | if (ata_msg_drv(dev->link->ap)) | |
608 | ata_dev_printk(dev, KERN_WARNING, "disabled\n"); | |
609 | ata_down_xfermask_limit(dev, ATA_DNXFER_FORCE_PIO0 | | |
610 | ATA_DNXFER_QUIET); | |
611 | dev->class++; | |
612 | } | |
613 | } | |
614 | ||
615 | /** | |
616 | * ata_devchk - PATA device presence detection | |
617 | * @ap: ATA channel to examine | |
618 | * @device: Device to examine (starting at zero) | |
619 | * | |
620 | * This technique was originally described in | |
621 | * Hale Landis's ATADRVR (www.ata-atapi.com), and | |
622 | * later found its way into the ATA/ATAPI spec. | |
623 | * | |
624 | * Write a pattern to the ATA shadow registers, | |
625 | * and if a device is present, it will respond by | |
626 | * correctly storing and echoing back the | |
627 | * ATA shadow register contents. | |
628 | * | |
629 | * LOCKING: | |
630 | * caller. | |
631 | */ | |
632 | ||
633 | static unsigned int ata_devchk(struct ata_port *ap, unsigned int device) | |
634 | { | |
635 | struct ata_ioports *ioaddr = &ap->ioaddr; | |
636 | u8 nsect, lbal; | |
637 | ||
638 | ap->ops->dev_select(ap, device); | |
639 | ||
640 | iowrite8(0x55, ioaddr->nsect_addr); | |
641 | iowrite8(0xaa, ioaddr->lbal_addr); | |
642 | ||
643 | iowrite8(0xaa, ioaddr->nsect_addr); | |
644 | iowrite8(0x55, ioaddr->lbal_addr); | |
645 | ||
646 | iowrite8(0x55, ioaddr->nsect_addr); | |
647 | iowrite8(0xaa, ioaddr->lbal_addr); | |
648 | ||
649 | nsect = ioread8(ioaddr->nsect_addr); | |
650 | lbal = ioread8(ioaddr->lbal_addr); | |
651 | ||
652 | if ((nsect == 0x55) && (lbal == 0xaa)) | |
653 | return 1; /* we found a device */ | |
654 | ||
655 | return 0; /* nothing found */ | |
656 | } | |
657 | ||
658 | /** | |
659 | * ata_dev_classify - determine device type based on ATA-spec signature | |
660 | * @tf: ATA taskfile register set for device to be identified | |
661 | * | |
662 | * Determine from taskfile register contents whether a device is | |
663 | * ATA or ATAPI, as per "Signature and persistence" section | |
664 | * of ATA/PI spec (volume 1, sect 5.14). | |
665 | * | |
666 | * LOCKING: | |
667 | * None. | |
668 | * | |
669 | * RETURNS: | |
670 | * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, or %ATA_DEV_UNKNOWN | |
671 | * the event of failure. | |
672 | */ | |
673 | ||
674 | unsigned int ata_dev_classify(const struct ata_taskfile *tf) | |
675 | { | |
676 | /* Apple's open source Darwin code hints that some devices only | |
677 | * put a proper signature into the LBA mid/high registers, | |
678 | * So, we only check those. It's sufficient for uniqueness. | |
679 | */ | |
680 | ||
681 | if (((tf->lbam == 0) && (tf->lbah == 0)) || | |
682 | ((tf->lbam == 0x3c) && (tf->lbah == 0xc3))) { | |
683 | DPRINTK("found ATA device by sig\n"); | |
684 | return ATA_DEV_ATA; | |
685 | } | |
686 | ||
687 | if (((tf->lbam == 0x14) && (tf->lbah == 0xeb)) || | |
688 | ((tf->lbam == 0x69) && (tf->lbah == 0x96))) { | |
689 | DPRINTK("found ATAPI device by sig\n"); | |
690 | return ATA_DEV_ATAPI; | |
691 | } | |
692 | ||
693 | DPRINTK("unknown device\n"); | |
694 | return ATA_DEV_UNKNOWN; | |
695 | } | |
696 | ||
697 | /** | |
698 | * ata_dev_try_classify - Parse returned ATA device signature | |
699 | * @ap: ATA channel to examine | |
700 | * @device: Device to examine (starting at zero) | |
701 | * @r_err: Value of error register on completion | |
702 | * | |
703 | * After an event -- SRST, E.D.D., or SATA COMRESET -- occurs, | |
704 | * an ATA/ATAPI-defined set of values is placed in the ATA | |
705 | * shadow registers, indicating the results of device detection | |
706 | * and diagnostics. | |
707 | * | |
708 | * Select the ATA device, and read the values from the ATA shadow | |
709 | * registers. Then parse according to the Error register value, | |
710 | * and the spec-defined values examined by ata_dev_classify(). | |
711 | * | |
712 | * LOCKING: | |
713 | * caller. | |
714 | * | |
715 | * RETURNS: | |
716 | * Device type - %ATA_DEV_ATA, %ATA_DEV_ATAPI or %ATA_DEV_NONE. | |
717 | */ | |
718 | ||
719 | unsigned int | |
720 | ata_dev_try_classify(struct ata_port *ap, unsigned int device, u8 *r_err) | |
721 | { | |
722 | struct ata_taskfile tf; | |
723 | unsigned int class; | |
724 | u8 err; | |
725 | ||
726 | ap->ops->dev_select(ap, device); | |
727 | ||
728 | memset(&tf, 0, sizeof(tf)); | |
729 | ||
730 | ap->ops->tf_read(ap, &tf); | |
731 | err = tf.feature; | |
732 | if (r_err) | |
733 | *r_err = err; | |
734 | ||
735 | /* see if device passed diags: if master then continue and warn later */ | |
736 | if (err == 0 && device == 0) | |
737 | /* diagnostic fail : do nothing _YET_ */ | |
738 | ap->link.device[device].horkage |= ATA_HORKAGE_DIAGNOSTIC; | |
739 | else if (err == 1) | |
740 | /* do nothing */ ; | |
741 | else if ((device == 0) && (err == 0x81)) | |
742 | /* do nothing */ ; | |
743 | else | |
744 | return ATA_DEV_NONE; | |
745 | ||
746 | /* determine if device is ATA or ATAPI */ | |
747 | class = ata_dev_classify(&tf); | |
748 | ||
749 | if (class == ATA_DEV_UNKNOWN) | |
750 | return ATA_DEV_NONE; | |
751 | if ((class == ATA_DEV_ATA) && (ata_chk_status(ap) == 0)) | |
752 | return ATA_DEV_NONE; | |
753 | return class; | |
754 | } | |
755 | ||
756 | /** | |
757 | * ata_id_string - Convert IDENTIFY DEVICE page into string | |
758 | * @id: IDENTIFY DEVICE results we will examine | |
759 | * @s: string into which data is output | |
760 | * @ofs: offset into identify device page | |
761 | * @len: length of string to return. must be an even number. | |
762 | * | |
763 | * The strings in the IDENTIFY DEVICE page are broken up into | |
764 | * 16-bit chunks. Run through the string, and output each | |
765 | * 8-bit chunk linearly, regardless of platform. | |
766 | * | |
767 | * LOCKING: | |
768 | * caller. | |
769 | */ | |
770 | ||
771 | void ata_id_string(const u16 *id, unsigned char *s, | |
772 | unsigned int ofs, unsigned int len) | |
773 | { | |
774 | unsigned int c; | |
775 | ||
776 | while (len > 0) { | |
777 | c = id[ofs] >> 8; | |
778 | *s = c; | |
779 | s++; | |
780 | ||
781 | c = id[ofs] & 0xff; | |
782 | *s = c; | |
783 | s++; | |
784 | ||
785 | ofs++; | |
786 | len -= 2; | |
787 | } | |
788 | } | |
789 | ||
790 | /** | |
791 | * ata_id_c_string - Convert IDENTIFY DEVICE page into C string | |
792 | * @id: IDENTIFY DEVICE results we will examine | |
793 | * @s: string into which data is output | |
794 | * @ofs: offset into identify device page | |
795 | * @len: length of string to return. must be an odd number. | |
796 | * | |
797 | * This function is identical to ata_id_string except that it | |
798 | * trims trailing spaces and terminates the resulting string with | |
799 | * null. @len must be actual maximum length (even number) + 1. | |
800 | * | |
801 | * LOCKING: | |
802 | * caller. | |
803 | */ | |
804 | void ata_id_c_string(const u16 *id, unsigned char *s, | |
805 | unsigned int ofs, unsigned int len) | |
806 | { | |
807 | unsigned char *p; | |
808 | ||
809 | WARN_ON(!(len & 1)); | |
810 | ||
811 | ata_id_string(id, s, ofs, len - 1); | |
812 | ||
813 | p = s + strnlen(s, len - 1); | |
814 | while (p > s && p[-1] == ' ') | |
815 | p--; | |
816 | *p = '\0'; | |
817 | } | |
818 | ||
819 | static u64 ata_tf_to_lba48(struct ata_taskfile *tf) | |
820 | { | |
821 | u64 sectors = 0; | |
822 | ||
823 | sectors |= ((u64)(tf->hob_lbah & 0xff)) << 40; | |
824 | sectors |= ((u64)(tf->hob_lbam & 0xff)) << 32; | |
825 | sectors |= (tf->hob_lbal & 0xff) << 24; | |
826 | sectors |= (tf->lbah & 0xff) << 16; | |
827 | sectors |= (tf->lbam & 0xff) << 8; | |
828 | sectors |= (tf->lbal & 0xff); | |
829 | ||
830 | return ++sectors; | |
831 | } | |
832 | ||
833 | static u64 ata_tf_to_lba(struct ata_taskfile *tf) | |
834 | { | |
835 | u64 sectors = 0; | |
836 | ||
837 | sectors |= (tf->device & 0x0f) << 24; | |
838 | sectors |= (tf->lbah & 0xff) << 16; | |
839 | sectors |= (tf->lbam & 0xff) << 8; | |
840 | sectors |= (tf->lbal & 0xff); | |
841 | ||
842 | return ++sectors; | |
843 | } | |
844 | ||
845 | /** | |
846 | * ata_read_native_max_address_ext - LBA48 native max query | |
847 | * @dev: Device to query | |
848 | * | |
849 | * Perform an LBA48 size query upon the device in question. Return the | |
850 | * actual LBA48 size or zero if the command fails. | |
851 | */ | |
852 | ||
853 | static u64 ata_read_native_max_address_ext(struct ata_device *dev) | |
854 | { | |
855 | unsigned int err; | |
856 | struct ata_taskfile tf; | |
857 | ||
858 | ata_tf_init(dev, &tf); | |
859 | ||
860 | tf.command = ATA_CMD_READ_NATIVE_MAX_EXT; | |
861 | tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48 | ATA_TFLAG_ISADDR; | |
862 | tf.protocol |= ATA_PROT_NODATA; | |
863 | tf.device |= 0x40; | |
864 | ||
865 | err = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0); | |
866 | if (err) | |
867 | return 0; | |
868 | ||
869 | return ata_tf_to_lba48(&tf); | |
870 | } | |
871 | ||
872 | /** | |
873 | * ata_read_native_max_address - LBA28 native max query | |
874 | * @dev: Device to query | |
875 | * | |
876 | * Performa an LBA28 size query upon the device in question. Return the | |
877 | * actual LBA28 size or zero if the command fails. | |
878 | */ | |
879 | ||
880 | static u64 ata_read_native_max_address(struct ata_device *dev) | |
881 | { | |
882 | unsigned int err; | |
883 | struct ata_taskfile tf; | |
884 | ||
885 | ata_tf_init(dev, &tf); | |
886 | ||
887 | tf.command = ATA_CMD_READ_NATIVE_MAX; | |
888 | tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; | |
889 | tf.protocol |= ATA_PROT_NODATA; | |
890 | tf.device |= 0x40; | |
891 | ||
892 | err = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0); | |
893 | if (err) | |
894 | return 0; | |
895 | ||
896 | return ata_tf_to_lba(&tf); | |
897 | } | |
898 | ||
899 | /** | |
900 | * ata_set_native_max_address_ext - LBA48 native max set | |
901 | * @dev: Device to query | |
902 | * @new_sectors: new max sectors value to set for the device | |
903 | * | |
904 | * Perform an LBA48 size set max upon the device in question. Return the | |
905 | * actual LBA48 size or zero if the command fails. | |
906 | */ | |
907 | ||
908 | static u64 ata_set_native_max_address_ext(struct ata_device *dev, u64 new_sectors) | |
909 | { | |
910 | unsigned int err; | |
911 | struct ata_taskfile tf; | |
912 | ||
913 | new_sectors--; | |
914 | ||
915 | ata_tf_init(dev, &tf); | |
916 | ||
917 | tf.command = ATA_CMD_SET_MAX_EXT; | |
918 | tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48 | ATA_TFLAG_ISADDR; | |
919 | tf.protocol |= ATA_PROT_NODATA; | |
920 | tf.device |= 0x40; | |
921 | ||
922 | tf.lbal = (new_sectors >> 0) & 0xff; | |
923 | tf.lbam = (new_sectors >> 8) & 0xff; | |
924 | tf.lbah = (new_sectors >> 16) & 0xff; | |
925 | ||
926 | tf.hob_lbal = (new_sectors >> 24) & 0xff; | |
927 | tf.hob_lbam = (new_sectors >> 32) & 0xff; | |
928 | tf.hob_lbah = (new_sectors >> 40) & 0xff; | |
929 | ||
930 | err = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0); | |
931 | if (err) | |
932 | return 0; | |
933 | ||
934 | return ata_tf_to_lba48(&tf); | |
935 | } | |
936 | ||
937 | /** | |
938 | * ata_set_native_max_address - LBA28 native max set | |
939 | * @dev: Device to query | |
940 | * @new_sectors: new max sectors value to set for the device | |
941 | * | |
942 | * Perform an LBA28 size set max upon the device in question. Return the | |
943 | * actual LBA28 size or zero if the command fails. | |
944 | */ | |
945 | ||
946 | static u64 ata_set_native_max_address(struct ata_device *dev, u64 new_sectors) | |
947 | { | |
948 | unsigned int err; | |
949 | struct ata_taskfile tf; | |
950 | ||
951 | new_sectors--; | |
952 | ||
953 | ata_tf_init(dev, &tf); | |
954 | ||
955 | tf.command = ATA_CMD_SET_MAX; | |
956 | tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; | |
957 | tf.protocol |= ATA_PROT_NODATA; | |
958 | ||
959 | tf.lbal = (new_sectors >> 0) & 0xff; | |
960 | tf.lbam = (new_sectors >> 8) & 0xff; | |
961 | tf.lbah = (new_sectors >> 16) & 0xff; | |
962 | tf.device |= ((new_sectors >> 24) & 0x0f) | 0x40; | |
963 | ||
964 | err = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0); | |
965 | if (err) | |
966 | return 0; | |
967 | ||
968 | return ata_tf_to_lba(&tf); | |
969 | } | |
970 | ||
971 | /** | |
972 | * ata_hpa_resize - Resize a device with an HPA set | |
973 | * @dev: Device to resize | |
974 | * | |
975 | * Read the size of an LBA28 or LBA48 disk with HPA features and resize | |
976 | * it if required to the full size of the media. The caller must check | |
977 | * the drive has the HPA feature set enabled. | |
978 | */ | |
979 | ||
980 | static u64 ata_hpa_resize(struct ata_device *dev) | |
981 | { | |
982 | u64 sectors = dev->n_sectors; | |
983 | u64 hpa_sectors; | |
984 | ||
985 | if (ata_id_has_lba48(dev->id)) | |
986 | hpa_sectors = ata_read_native_max_address_ext(dev); | |
987 | else | |
988 | hpa_sectors = ata_read_native_max_address(dev); | |
989 | ||
990 | if (hpa_sectors > sectors) { | |
991 | ata_dev_printk(dev, KERN_INFO, | |
992 | "Host Protected Area detected:\n" | |
993 | "\tcurrent size: %lld sectors\n" | |
994 | "\tnative size: %lld sectors\n", | |
995 | (long long)sectors, (long long)hpa_sectors); | |
996 | ||
997 | if (ata_ignore_hpa) { | |
998 | if (ata_id_has_lba48(dev->id)) | |
999 | hpa_sectors = ata_set_native_max_address_ext(dev, hpa_sectors); | |
1000 | else | |
1001 | hpa_sectors = ata_set_native_max_address(dev, | |
1002 | hpa_sectors); | |
1003 | ||
1004 | if (hpa_sectors) { | |
1005 | ata_dev_printk(dev, KERN_INFO, "native size " | |
1006 | "increased to %lld sectors\n", | |
1007 | (long long)hpa_sectors); | |
1008 | return hpa_sectors; | |
1009 | } | |
1010 | } | |
1011 | } else if (hpa_sectors < sectors) | |
1012 | ata_dev_printk(dev, KERN_WARNING, "%s 1: hpa sectors (%lld) " | |
1013 | "is smaller than sectors (%lld)\n", __FUNCTION__, | |
1014 | (long long)hpa_sectors, (long long)sectors); | |
1015 | ||
1016 | return sectors; | |
1017 | } | |
1018 | ||
1019 | static u64 ata_id_n_sectors(const u16 *id) | |
1020 | { | |
1021 | if (ata_id_has_lba(id)) { | |
1022 | if (ata_id_has_lba48(id)) | |
1023 | return ata_id_u64(id, 100); | |
1024 | else | |
1025 | return ata_id_u32(id, 60); | |
1026 | } else { | |
1027 | if (ata_id_current_chs_valid(id)) | |
1028 | return ata_id_u32(id, 57); | |
1029 | else | |
1030 | return id[1] * id[3] * id[6]; | |
1031 | } | |
1032 | } | |
1033 | ||
1034 | /** | |
1035 | * ata_id_to_dma_mode - Identify DMA mode from id block | |
1036 | * @dev: device to identify | |
1037 | * @unknown: mode to assume if we cannot tell | |
1038 | * | |
1039 | * Set up the timing values for the device based upon the identify | |
1040 | * reported values for the DMA mode. This function is used by drivers | |
1041 | * which rely upon firmware configured modes, but wish to report the | |
1042 | * mode correctly when possible. | |
1043 | * | |
1044 | * In addition we emit similarly formatted messages to the default | |
1045 | * ata_dev_set_mode handler, in order to provide consistency of | |
1046 | * presentation. | |
1047 | */ | |
1048 | ||
1049 | void ata_id_to_dma_mode(struct ata_device *dev, u8 unknown) | |
1050 | { | |
1051 | unsigned int mask; | |
1052 | u8 mode; | |
1053 | ||
1054 | /* Pack the DMA modes */ | |
1055 | mask = ((dev->id[63] >> 8) << ATA_SHIFT_MWDMA) & ATA_MASK_MWDMA; | |
1056 | if (dev->id[53] & 0x04) | |
1057 | mask |= ((dev->id[88] >> 8) << ATA_SHIFT_UDMA) & ATA_MASK_UDMA; | |
1058 | ||
1059 | /* Select the mode in use */ | |
1060 | mode = ata_xfer_mask2mode(mask); | |
1061 | ||
1062 | if (mode != 0) { | |
1063 | ata_dev_printk(dev, KERN_INFO, "configured for %s\n", | |
1064 | ata_mode_string(mask)); | |
1065 | } else { | |
1066 | /* SWDMA perhaps ? */ | |
1067 | mode = unknown; | |
1068 | ata_dev_printk(dev, KERN_INFO, "configured for DMA\n"); | |
1069 | } | |
1070 | ||
1071 | /* Configure the device reporting */ | |
1072 | dev->xfer_mode = mode; | |
1073 | dev->xfer_shift = ata_xfer_mode2shift(mode); | |
1074 | } | |
1075 | ||
1076 | /** | |
1077 | * ata_noop_dev_select - Select device 0/1 on ATA bus | |
1078 | * @ap: ATA channel to manipulate | |
1079 | * @device: ATA device (numbered from zero) to select | |
1080 | * | |
1081 | * This function performs no actual function. | |
1082 | * | |
1083 | * May be used as the dev_select() entry in ata_port_operations. | |
1084 | * | |
1085 | * LOCKING: | |
1086 | * caller. | |
1087 | */ | |
1088 | void ata_noop_dev_select (struct ata_port *ap, unsigned int device) | |
1089 | { | |
1090 | } | |
1091 | ||
1092 | ||
1093 | /** | |
1094 | * ata_std_dev_select - Select device 0/1 on ATA bus | |
1095 | * @ap: ATA channel to manipulate | |
1096 | * @device: ATA device (numbered from zero) to select | |
1097 | * | |
1098 | * Use the method defined in the ATA specification to | |
1099 | * make either device 0, or device 1, active on the | |
1100 | * ATA channel. Works with both PIO and MMIO. | |
1101 | * | |
1102 | * May be used as the dev_select() entry in ata_port_operations. | |
1103 | * | |
1104 | * LOCKING: | |
1105 | * caller. | |
1106 | */ | |
1107 | ||
1108 | void ata_std_dev_select (struct ata_port *ap, unsigned int device) | |
1109 | { | |
1110 | u8 tmp; | |
1111 | ||
1112 | if (device == 0) | |
1113 | tmp = ATA_DEVICE_OBS; | |
1114 | else | |
1115 | tmp = ATA_DEVICE_OBS | ATA_DEV1; | |
1116 | ||
1117 | iowrite8(tmp, ap->ioaddr.device_addr); | |
1118 | ata_pause(ap); /* needed; also flushes, for mmio */ | |
1119 | } | |
1120 | ||
1121 | /** | |
1122 | * ata_dev_select - Select device 0/1 on ATA bus | |
1123 | * @ap: ATA channel to manipulate | |
1124 | * @device: ATA device (numbered from zero) to select | |
1125 | * @wait: non-zero to wait for Status register BSY bit to clear | |
1126 | * @can_sleep: non-zero if context allows sleeping | |
1127 | * | |
1128 | * Use the method defined in the ATA specification to | |
1129 | * make either device 0, or device 1, active on the | |
1130 | * ATA channel. | |
1131 | * | |
1132 | * This is a high-level version of ata_std_dev_select(), | |
1133 | * which additionally provides the services of inserting | |
1134 | * the proper pauses and status polling, where needed. | |
1135 | * | |
1136 | * LOCKING: | |
1137 | * caller. | |
1138 | */ | |
1139 | ||
1140 | void ata_dev_select(struct ata_port *ap, unsigned int device, | |
1141 | unsigned int wait, unsigned int can_sleep) | |
1142 | { | |
1143 | if (ata_msg_probe(ap)) | |
1144 | ata_port_printk(ap, KERN_INFO, "ata_dev_select: ENTER, " | |
1145 | "device %u, wait %u\n", device, wait); | |
1146 | ||
1147 | if (wait) | |
1148 | ata_wait_idle(ap); | |
1149 | ||
1150 | ap->ops->dev_select(ap, device); | |
1151 | ||
1152 | if (wait) { | |
1153 | if (can_sleep && ap->link.device[device].class == ATA_DEV_ATAPI) | |
1154 | msleep(150); | |
1155 | ata_wait_idle(ap); | |
1156 | } | |
1157 | } | |
1158 | ||
1159 | /** | |
1160 | * ata_dump_id - IDENTIFY DEVICE info debugging output | |
1161 | * @id: IDENTIFY DEVICE page to dump | |
1162 | * | |
1163 | * Dump selected 16-bit words from the given IDENTIFY DEVICE | |
1164 | * page. | |
1165 | * | |
1166 | * LOCKING: | |
1167 | * caller. | |
1168 | */ | |
1169 | ||
1170 | static inline void ata_dump_id(const u16 *id) | |
1171 | { | |
1172 | DPRINTK("49==0x%04x " | |
1173 | "53==0x%04x " | |
1174 | "63==0x%04x " | |
1175 | "64==0x%04x " | |
1176 | "75==0x%04x \n", | |
1177 | id[49], | |
1178 | id[53], | |
1179 | id[63], | |
1180 | id[64], | |
1181 | id[75]); | |
1182 | DPRINTK("80==0x%04x " | |
1183 | "81==0x%04x " | |
1184 | "82==0x%04x " | |
1185 | "83==0x%04x " | |
1186 | "84==0x%04x \n", | |
1187 | id[80], | |
1188 | id[81], | |
1189 | id[82], | |
1190 | id[83], | |
1191 | id[84]); | |
1192 | DPRINTK("88==0x%04x " | |
1193 | "93==0x%04x\n", | |
1194 | id[88], | |
1195 | id[93]); | |
1196 | } | |
1197 | ||
1198 | /** | |
1199 | * ata_id_xfermask - Compute xfermask from the given IDENTIFY data | |
1200 | * @id: IDENTIFY data to compute xfer mask from | |
1201 | * | |
1202 | * Compute the xfermask for this device. This is not as trivial | |
1203 | * as it seems if we must consider early devices correctly. | |
1204 | * | |
1205 | * FIXME: pre IDE drive timing (do we care ?). | |
1206 | * | |
1207 | * LOCKING: | |
1208 | * None. | |
1209 | * | |
1210 | * RETURNS: | |
1211 | * Computed xfermask | |
1212 | */ | |
1213 | static unsigned int ata_id_xfermask(const u16 *id) | |
1214 | { | |
1215 | unsigned int pio_mask, mwdma_mask, udma_mask; | |
1216 | ||
1217 | /* Usual case. Word 53 indicates word 64 is valid */ | |
1218 | if (id[ATA_ID_FIELD_VALID] & (1 << 1)) { | |
1219 | pio_mask = id[ATA_ID_PIO_MODES] & 0x03; | |
1220 | pio_mask <<= 3; | |
1221 | pio_mask |= 0x7; | |
1222 | } else { | |
1223 | /* If word 64 isn't valid then Word 51 high byte holds | |
1224 | * the PIO timing number for the maximum. Turn it into | |
1225 | * a mask. | |
1226 | */ | |
1227 | u8 mode = (id[ATA_ID_OLD_PIO_MODES] >> 8) & 0xFF; | |
1228 | if (mode < 5) /* Valid PIO range */ | |
1229 | pio_mask = (2 << mode) - 1; | |
1230 | else | |
1231 | pio_mask = 1; | |
1232 | ||
1233 | /* But wait.. there's more. Design your standards by | |
1234 | * committee and you too can get a free iordy field to | |
1235 | * process. However its the speeds not the modes that | |
1236 | * are supported... Note drivers using the timing API | |
1237 | * will get this right anyway | |
1238 | */ | |
1239 | } | |
1240 | ||
1241 | mwdma_mask = id[ATA_ID_MWDMA_MODES] & 0x07; | |
1242 | ||
1243 | if (ata_id_is_cfa(id)) { | |
1244 | /* | |
1245 | * Process compact flash extended modes | |
1246 | */ | |
1247 | int pio = id[163] & 0x7; | |
1248 | int dma = (id[163] >> 3) & 7; | |
1249 | ||
1250 | if (pio) | |
1251 | pio_mask |= (1 << 5); | |
1252 | if (pio > 1) | |
1253 | pio_mask |= (1 << 6); | |
1254 | if (dma) | |
1255 | mwdma_mask |= (1 << 3); | |
1256 | if (dma > 1) | |
1257 | mwdma_mask |= (1 << 4); | |
1258 | } | |
1259 | ||
1260 | udma_mask = 0; | |
1261 | if (id[ATA_ID_FIELD_VALID] & (1 << 2)) | |
1262 | udma_mask = id[ATA_ID_UDMA_MODES] & 0xff; | |
1263 | ||
1264 | return ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask); | |
1265 | } | |
1266 | ||
1267 | /** | |
1268 | * ata_port_queue_task - Queue port_task | |
1269 | * @ap: The ata_port to queue port_task for | |
1270 | * @fn: workqueue function to be scheduled | |
1271 | * @data: data for @fn to use | |
1272 | * @delay: delay time for workqueue function | |
1273 | * | |
1274 | * Schedule @fn(@data) for execution after @delay jiffies using | |
1275 | * port_task. There is one port_task per port and it's the | |
1276 | * user(low level driver)'s responsibility to make sure that only | |
1277 | * one task is active at any given time. | |
1278 | * | |
1279 | * libata core layer takes care of synchronization between | |
1280 | * port_task and EH. ata_port_queue_task() may be ignored for EH | |
1281 | * synchronization. | |
1282 | * | |
1283 | * LOCKING: | |
1284 | * Inherited from caller. | |
1285 | */ | |
1286 | void ata_port_queue_task(struct ata_port *ap, work_func_t fn, void *data, | |
1287 | unsigned long delay) | |
1288 | { | |
1289 | PREPARE_DELAYED_WORK(&ap->port_task, fn); | |
1290 | ap->port_task_data = data; | |
1291 | ||
1292 | /* may fail if ata_port_flush_task() in progress */ | |
1293 | queue_delayed_work(ata_wq, &ap->port_task, delay); | |
1294 | } | |
1295 | ||
1296 | /** | |
1297 | * ata_port_flush_task - Flush port_task | |
1298 | * @ap: The ata_port to flush port_task for | |
1299 | * | |
1300 | * After this function completes, port_task is guranteed not to | |
1301 | * be running or scheduled. | |
1302 | * | |
1303 | * LOCKING: | |
1304 | * Kernel thread context (may sleep) | |
1305 | */ | |
1306 | void ata_port_flush_task(struct ata_port *ap) | |
1307 | { | |
1308 | DPRINTK("ENTER\n"); | |
1309 | ||
1310 | cancel_rearming_delayed_work(&ap->port_task); | |
1311 | ||
1312 | if (ata_msg_ctl(ap)) | |
1313 | ata_port_printk(ap, KERN_DEBUG, "%s: EXIT\n", __FUNCTION__); | |
1314 | } | |
1315 | ||
1316 | static void ata_qc_complete_internal(struct ata_queued_cmd *qc) | |
1317 | { | |
1318 | struct completion *waiting = qc->private_data; | |
1319 | ||
1320 | complete(waiting); | |
1321 | } | |
1322 | ||
1323 | /** | |
1324 | * ata_exec_internal_sg - execute libata internal command | |
1325 | * @dev: Device to which the command is sent | |
1326 | * @tf: Taskfile registers for the command and the result | |
1327 | * @cdb: CDB for packet command | |
1328 | * @dma_dir: Data tranfer direction of the command | |
1329 | * @sg: sg list for the data buffer of the command | |
1330 | * @n_elem: Number of sg entries | |
1331 | * | |
1332 | * Executes libata internal command with timeout. @tf contains | |
1333 | * command on entry and result on return. Timeout and error | |
1334 | * conditions are reported via return value. No recovery action | |
1335 | * is taken after a command times out. It's caller's duty to | |
1336 | * clean up after timeout. | |
1337 | * | |
1338 | * LOCKING: | |
1339 | * None. Should be called with kernel context, might sleep. | |
1340 | * | |
1341 | * RETURNS: | |
1342 | * Zero on success, AC_ERR_* mask on failure | |
1343 | */ | |
1344 | unsigned ata_exec_internal_sg(struct ata_device *dev, | |
1345 | struct ata_taskfile *tf, const u8 *cdb, | |
1346 | int dma_dir, struct scatterlist *sg, | |
1347 | unsigned int n_elem) | |
1348 | { | |
1349 | struct ata_link *link = dev->link; | |
1350 | struct ata_port *ap = link->ap; | |
1351 | u8 command = tf->command; | |
1352 | struct ata_queued_cmd *qc; | |
1353 | unsigned int tag, preempted_tag; | |
1354 | u32 preempted_sactive, preempted_qc_active; | |
1355 | DECLARE_COMPLETION_ONSTACK(wait); | |
1356 | unsigned long flags; | |
1357 | unsigned int err_mask; | |
1358 | int rc; | |
1359 | ||
1360 | spin_lock_irqsave(ap->lock, flags); | |
1361 | ||
1362 | /* no internal command while frozen */ | |
1363 | if (ap->pflags & ATA_PFLAG_FROZEN) { | |
1364 | spin_unlock_irqrestore(ap->lock, flags); | |
1365 | return AC_ERR_SYSTEM; | |
1366 | } | |
1367 | ||
1368 | /* initialize internal qc */ | |
1369 | ||
1370 | /* XXX: Tag 0 is used for drivers with legacy EH as some | |
1371 | * drivers choke if any other tag is given. This breaks | |
1372 | * ata_tag_internal() test for those drivers. Don't use new | |
1373 | * EH stuff without converting to it. | |
1374 | */ | |
1375 | if (ap->ops->error_handler) | |
1376 | tag = ATA_TAG_INTERNAL; | |
1377 | else | |
1378 | tag = 0; | |
1379 | ||
1380 | if (test_and_set_bit(tag, &ap->qc_allocated)) | |
1381 | BUG(); | |
1382 | qc = __ata_qc_from_tag(ap, tag); | |
1383 | ||
1384 | qc->tag = tag; | |
1385 | qc->scsicmd = NULL; | |
1386 | qc->ap = ap; | |
1387 | qc->dev = dev; | |
1388 | ata_qc_reinit(qc); | |
1389 | ||
1390 | preempted_tag = link->active_tag; | |
1391 | preempted_sactive = link->sactive; | |
1392 | preempted_qc_active = ap->qc_active; | |
1393 | link->active_tag = ATA_TAG_POISON; | |
1394 | link->sactive = 0; | |
1395 | ap->qc_active = 0; | |
1396 | ||
1397 | /* prepare & issue qc */ | |
1398 | qc->tf = *tf; | |
1399 | if (cdb) | |
1400 | memcpy(qc->cdb, cdb, ATAPI_CDB_LEN); | |
1401 | qc->flags |= ATA_QCFLAG_RESULT_TF; | |
1402 | qc->dma_dir = dma_dir; | |
1403 | if (dma_dir != DMA_NONE) { | |
1404 | unsigned int i, buflen = 0; | |
1405 | ||
1406 | for (i = 0; i < n_elem; i++) | |
1407 | buflen += sg[i].length; | |
1408 | ||
1409 | ata_sg_init(qc, sg, n_elem); | |
1410 | qc->nbytes = buflen; | |
1411 | } | |
1412 | ||
1413 | qc->private_data = &wait; | |
1414 | qc->complete_fn = ata_qc_complete_internal; | |
1415 | ||
1416 | ata_qc_issue(qc); | |
1417 | ||
1418 | spin_unlock_irqrestore(ap->lock, flags); | |
1419 | ||
1420 | rc = wait_for_completion_timeout(&wait, ata_probe_timeout); | |
1421 | ||
1422 | ata_port_flush_task(ap); | |
1423 | ||
1424 | if (!rc) { | |
1425 | spin_lock_irqsave(ap->lock, flags); | |
1426 | ||
1427 | /* We're racing with irq here. If we lose, the | |
1428 | * following test prevents us from completing the qc | |
1429 | * twice. If we win, the port is frozen and will be | |
1430 | * cleaned up by ->post_internal_cmd(). | |
1431 | */ | |
1432 | if (qc->flags & ATA_QCFLAG_ACTIVE) { | |
1433 | qc->err_mask |= AC_ERR_TIMEOUT; | |
1434 | ||
1435 | if (ap->ops->error_handler) | |
1436 | ata_port_freeze(ap); | |
1437 | else | |
1438 | ata_qc_complete(qc); | |
1439 | ||
1440 | if (ata_msg_warn(ap)) | |
1441 | ata_dev_printk(dev, KERN_WARNING, | |
1442 | "qc timeout (cmd 0x%x)\n", command); | |
1443 | } | |
1444 | ||
1445 | spin_unlock_irqrestore(ap->lock, flags); | |
1446 | } | |
1447 | ||
1448 | /* do post_internal_cmd */ | |
1449 | if (ap->ops->post_internal_cmd) | |
1450 | ap->ops->post_internal_cmd(qc); | |
1451 | ||
1452 | /* perform minimal error analysis */ | |
1453 | if (qc->flags & ATA_QCFLAG_FAILED) { | |
1454 | if (qc->result_tf.command & (ATA_ERR | ATA_DF)) | |
1455 | qc->err_mask |= AC_ERR_DEV; | |
1456 | ||
1457 | if (!qc->err_mask) | |
1458 | qc->err_mask |= AC_ERR_OTHER; | |
1459 | ||
1460 | if (qc->err_mask & ~AC_ERR_OTHER) | |
1461 | qc->err_mask &= ~AC_ERR_OTHER; | |
1462 | } | |
1463 | ||
1464 | /* finish up */ | |
1465 | spin_lock_irqsave(ap->lock, flags); | |
1466 | ||
1467 | *tf = qc->result_tf; | |
1468 | err_mask = qc->err_mask; | |
1469 | ||
1470 | ata_qc_free(qc); | |
1471 | link->active_tag = preempted_tag; | |
1472 | link->sactive = preempted_sactive; | |
1473 | ap->qc_active = preempted_qc_active; | |
1474 | ||
1475 | /* XXX - Some LLDDs (sata_mv) disable port on command failure. | |
1476 | * Until those drivers are fixed, we detect the condition | |
1477 | * here, fail the command with AC_ERR_SYSTEM and reenable the | |
1478 | * port. | |
1479 | * | |
1480 | * Note that this doesn't change any behavior as internal | |
1481 | * command failure results in disabling the device in the | |
1482 | * higher layer for LLDDs without new reset/EH callbacks. | |
1483 | * | |
1484 | * Kill the following code as soon as those drivers are fixed. | |
1485 | */ | |
1486 | if (ap->flags & ATA_FLAG_DISABLED) { | |
1487 | err_mask |= AC_ERR_SYSTEM; | |
1488 | ata_port_probe(ap); | |
1489 | } | |
1490 | ||
1491 | spin_unlock_irqrestore(ap->lock, flags); | |
1492 | ||
1493 | return err_mask; | |
1494 | } | |
1495 | ||
1496 | /** | |
1497 | * ata_exec_internal - execute libata internal command | |
1498 | * @dev: Device to which the command is sent | |
1499 | * @tf: Taskfile registers for the command and the result | |
1500 | * @cdb: CDB for packet command | |
1501 | * @dma_dir: Data tranfer direction of the command | |
1502 | * @buf: Data buffer of the command | |
1503 | * @buflen: Length of data buffer | |
1504 | * | |
1505 | * Wrapper around ata_exec_internal_sg() which takes simple | |
1506 | * buffer instead of sg list. | |
1507 | * | |
1508 | * LOCKING: | |
1509 | * None. Should be called with kernel context, might sleep. | |
1510 | * | |
1511 | * RETURNS: | |
1512 | * Zero on success, AC_ERR_* mask on failure | |
1513 | */ | |
1514 | unsigned ata_exec_internal(struct ata_device *dev, | |
1515 | struct ata_taskfile *tf, const u8 *cdb, | |
1516 | int dma_dir, void *buf, unsigned int buflen) | |
1517 | { | |
1518 | struct scatterlist *psg = NULL, sg; | |
1519 | unsigned int n_elem = 0; | |
1520 | ||
1521 | if (dma_dir != DMA_NONE) { | |
1522 | WARN_ON(!buf); | |
1523 | sg_init_one(&sg, buf, buflen); | |
1524 | psg = &sg; | |
1525 | n_elem++; | |
1526 | } | |
1527 | ||
1528 | return ata_exec_internal_sg(dev, tf, cdb, dma_dir, psg, n_elem); | |
1529 | } | |
1530 | ||
1531 | /** | |
1532 | * ata_do_simple_cmd - execute simple internal command | |
1533 | * @dev: Device to which the command is sent | |
1534 | * @cmd: Opcode to execute | |
1535 | * | |
1536 | * Execute a 'simple' command, that only consists of the opcode | |
1537 | * 'cmd' itself, without filling any other registers | |
1538 | * | |
1539 | * LOCKING: | |
1540 | * Kernel thread context (may sleep). | |
1541 | * | |
1542 | * RETURNS: | |
1543 | * Zero on success, AC_ERR_* mask on failure | |
1544 | */ | |
1545 | unsigned int ata_do_simple_cmd(struct ata_device *dev, u8 cmd) | |
1546 | { | |
1547 | struct ata_taskfile tf; | |
1548 | ||
1549 | ata_tf_init(dev, &tf); | |
1550 | ||
1551 | tf.command = cmd; | |
1552 | tf.flags |= ATA_TFLAG_DEVICE; | |
1553 | tf.protocol = ATA_PROT_NODATA; | |
1554 | ||
1555 | return ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0); | |
1556 | } | |
1557 | ||
1558 | /** | |
1559 | * ata_pio_need_iordy - check if iordy needed | |
1560 | * @adev: ATA device | |
1561 | * | |
1562 | * Check if the current speed of the device requires IORDY. Used | |
1563 | * by various controllers for chip configuration. | |
1564 | */ | |
1565 | ||
1566 | unsigned int ata_pio_need_iordy(const struct ata_device *adev) | |
1567 | { | |
1568 | /* Controller doesn't support IORDY. Probably a pointless check | |
1569 | as the caller should know this */ | |
1570 | if (adev->link->ap->flags & ATA_FLAG_NO_IORDY) | |
1571 | return 0; | |
1572 | /* PIO3 and higher it is mandatory */ | |
1573 | if (adev->pio_mode > XFER_PIO_2) | |
1574 | return 1; | |
1575 | /* We turn it on when possible */ | |
1576 | if (ata_id_has_iordy(adev->id)) | |
1577 | return 1; | |
1578 | return 0; | |
1579 | } | |
1580 | ||
1581 | /** | |
1582 | * ata_pio_mask_no_iordy - Return the non IORDY mask | |
1583 | * @adev: ATA device | |
1584 | * | |
1585 | * Compute the highest mode possible if we are not using iordy. Return | |
1586 | * -1 if no iordy mode is available. | |
1587 | */ | |
1588 | ||
1589 | static u32 ata_pio_mask_no_iordy(const struct ata_device *adev) | |
1590 | { | |
1591 | /* If we have no drive specific rule, then PIO 2 is non IORDY */ | |
1592 | if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE */ | |
1593 | u16 pio = adev->id[ATA_ID_EIDE_PIO]; | |
1594 | /* Is the speed faster than the drive allows non IORDY ? */ | |
1595 | if (pio) { | |
1596 | /* This is cycle times not frequency - watch the logic! */ | |
1597 | if (pio > 240) /* PIO2 is 240nS per cycle */ | |
1598 | return 3 << ATA_SHIFT_PIO; | |
1599 | return 7 << ATA_SHIFT_PIO; | |
1600 | } | |
1601 | } | |
1602 | return 3 << ATA_SHIFT_PIO; | |
1603 | } | |
1604 | ||
1605 | /** | |
1606 | * ata_dev_read_id - Read ID data from the specified device | |
1607 | * @dev: target device | |
1608 | * @p_class: pointer to class of the target device (may be changed) | |
1609 | * @flags: ATA_READID_* flags | |
1610 | * @id: buffer to read IDENTIFY data into | |
1611 | * | |
1612 | * Read ID data from the specified device. ATA_CMD_ID_ATA is | |
1613 | * performed on ATA devices and ATA_CMD_ID_ATAPI on ATAPI | |
1614 | * devices. This function also issues ATA_CMD_INIT_DEV_PARAMS | |
1615 | * for pre-ATA4 drives. | |
1616 | * | |
1617 | * LOCKING: | |
1618 | * Kernel thread context (may sleep) | |
1619 | * | |
1620 | * RETURNS: | |
1621 | * 0 on success, -errno otherwise. | |
1622 | */ | |
1623 | int ata_dev_read_id(struct ata_device *dev, unsigned int *p_class, | |
1624 | unsigned int flags, u16 *id) | |
1625 | { | |
1626 | struct ata_port *ap = dev->link->ap; | |
1627 | unsigned int class = *p_class; | |
1628 | struct ata_taskfile tf; | |
1629 | unsigned int err_mask = 0; | |
1630 | const char *reason; | |
1631 | int may_fallback = 1, tried_spinup = 0; | |
1632 | int rc; | |
1633 | ||
1634 | if (ata_msg_ctl(ap)) | |
1635 | ata_dev_printk(dev, KERN_DEBUG, "%s: ENTER\n", __FUNCTION__); | |
1636 | ||
1637 | ata_dev_select(ap, dev->devno, 1, 1); /* select device 0/1 */ | |
1638 | retry: | |
1639 | ata_tf_init(dev, &tf); | |
1640 | ||
1641 | switch (class) { | |
1642 | case ATA_DEV_ATA: | |
1643 | tf.command = ATA_CMD_ID_ATA; | |
1644 | break; | |
1645 | case ATA_DEV_ATAPI: | |
1646 | tf.command = ATA_CMD_ID_ATAPI; | |
1647 | break; | |
1648 | default: | |
1649 | rc = -ENODEV; | |
1650 | reason = "unsupported class"; | |
1651 | goto err_out; | |
1652 | } | |
1653 | ||
1654 | tf.protocol = ATA_PROT_PIO; | |
1655 | ||
1656 | /* Some devices choke if TF registers contain garbage. Make | |
1657 | * sure those are properly initialized. | |
1658 | */ | |
1659 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
1660 | ||
1661 | /* Device presence detection is unreliable on some | |
1662 | * controllers. Always poll IDENTIFY if available. | |
1663 | */ | |
1664 | tf.flags |= ATA_TFLAG_POLLING; | |
1665 | ||
1666 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_FROM_DEVICE, | |
1667 | id, sizeof(id[0]) * ATA_ID_WORDS); | |
1668 | if (err_mask) { | |
1669 | if (err_mask & AC_ERR_NODEV_HINT) { | |
1670 | DPRINTK("ata%u.%d: NODEV after polling detection\n", | |
1671 | ap->print_id, dev->devno); | |
1672 | return -ENOENT; | |
1673 | } | |
1674 | ||
1675 | /* Device or controller might have reported the wrong | |
1676 | * device class. Give a shot at the other IDENTIFY if | |
1677 | * the current one is aborted by the device. | |
1678 | */ | |
1679 | if (may_fallback && | |
1680 | (err_mask == AC_ERR_DEV) && (tf.feature & ATA_ABORTED)) { | |
1681 | may_fallback = 0; | |
1682 | ||
1683 | if (class == ATA_DEV_ATA) | |
1684 | class = ATA_DEV_ATAPI; | |
1685 | else | |
1686 | class = ATA_DEV_ATA; | |
1687 | goto retry; | |
1688 | } | |
1689 | ||
1690 | rc = -EIO; | |
1691 | reason = "I/O error"; | |
1692 | goto err_out; | |
1693 | } | |
1694 | ||
1695 | /* Falling back doesn't make sense if ID data was read | |
1696 | * successfully at least once. | |
1697 | */ | |
1698 | may_fallback = 0; | |
1699 | ||
1700 | swap_buf_le16(id, ATA_ID_WORDS); | |
1701 | ||
1702 | /* sanity check */ | |
1703 | rc = -EINVAL; | |
1704 | reason = "device reports invalid type"; | |
1705 | ||
1706 | if (class == ATA_DEV_ATA) { | |
1707 | if (!ata_id_is_ata(id) && !ata_id_is_cfa(id)) | |
1708 | goto err_out; | |
1709 | } else { | |
1710 | if (ata_id_is_ata(id)) | |
1711 | goto err_out; | |
1712 | } | |
1713 | ||
1714 | if (!tried_spinup && (id[2] == 0x37c8 || id[2] == 0x738c)) { | |
1715 | tried_spinup = 1; | |
1716 | /* | |
1717 | * Drive powered-up in standby mode, and requires a specific | |
1718 | * SET_FEATURES spin-up subcommand before it will accept | |
1719 | * anything other than the original IDENTIFY command. | |
1720 | */ | |
1721 | ata_tf_init(dev, &tf); | |
1722 | tf.command = ATA_CMD_SET_FEATURES; | |
1723 | tf.feature = SETFEATURES_SPINUP; | |
1724 | tf.protocol = ATA_PROT_NODATA; | |
1725 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
1726 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0); | |
1727 | if (err_mask && id[2] != 0x738c) { | |
1728 | rc = -EIO; | |
1729 | reason = "SPINUP failed"; | |
1730 | goto err_out; | |
1731 | } | |
1732 | /* | |
1733 | * If the drive initially returned incomplete IDENTIFY info, | |
1734 | * we now must reissue the IDENTIFY command. | |
1735 | */ | |
1736 | if (id[2] == 0x37c8) | |
1737 | goto retry; | |
1738 | } | |
1739 | ||
1740 | if ((flags & ATA_READID_POSTRESET) && class == ATA_DEV_ATA) { | |
1741 | /* | |
1742 | * The exact sequence expected by certain pre-ATA4 drives is: | |
1743 | * SRST RESET | |
1744 | * IDENTIFY | |
1745 | * INITIALIZE DEVICE PARAMETERS | |
1746 | * anything else.. | |
1747 | * Some drives were very specific about that exact sequence. | |
1748 | */ | |
1749 | if (ata_id_major_version(id) < 4 || !ata_id_has_lba(id)) { | |
1750 | err_mask = ata_dev_init_params(dev, id[3], id[6]); | |
1751 | if (err_mask) { | |
1752 | rc = -EIO; | |
1753 | reason = "INIT_DEV_PARAMS failed"; | |
1754 | goto err_out; | |
1755 | } | |
1756 | ||
1757 | /* current CHS translation info (id[53-58]) might be | |
1758 | * changed. reread the identify device info. | |
1759 | */ | |
1760 | flags &= ~ATA_READID_POSTRESET; | |
1761 | goto retry; | |
1762 | } | |
1763 | } | |
1764 | ||
1765 | *p_class = class; | |
1766 | ||
1767 | return 0; | |
1768 | ||
1769 | err_out: | |
1770 | if (ata_msg_warn(ap)) | |
1771 | ata_dev_printk(dev, KERN_WARNING, "failed to IDENTIFY " | |
1772 | "(%s, err_mask=0x%x)\n", reason, err_mask); | |
1773 | return rc; | |
1774 | } | |
1775 | ||
1776 | static inline u8 ata_dev_knobble(struct ata_device *dev) | |
1777 | { | |
1778 | struct ata_port *ap = dev->link->ap; | |
1779 | return ((ap->cbl == ATA_CBL_SATA) && (!ata_id_is_sata(dev->id))); | |
1780 | } | |
1781 | ||
1782 | static void ata_dev_config_ncq(struct ata_device *dev, | |
1783 | char *desc, size_t desc_sz) | |
1784 | { | |
1785 | struct ata_port *ap = dev->link->ap; | |
1786 | int hdepth = 0, ddepth = ata_id_queue_depth(dev->id); | |
1787 | ||
1788 | if (!ata_id_has_ncq(dev->id)) { | |
1789 | desc[0] = '\0'; | |
1790 | return; | |
1791 | } | |
1792 | if (dev->horkage & ATA_HORKAGE_NONCQ) { | |
1793 | snprintf(desc, desc_sz, "NCQ (not used)"); | |
1794 | return; | |
1795 | } | |
1796 | if (ap->flags & ATA_FLAG_NCQ) { | |
1797 | hdepth = min(ap->scsi_host->can_queue, ATA_MAX_QUEUE - 1); | |
1798 | dev->flags |= ATA_DFLAG_NCQ; | |
1799 | } | |
1800 | ||
1801 | if (hdepth >= ddepth) | |
1802 | snprintf(desc, desc_sz, "NCQ (depth %d)", ddepth); | |
1803 | else | |
1804 | snprintf(desc, desc_sz, "NCQ (depth %d/%d)", hdepth, ddepth); | |
1805 | } | |
1806 | ||
1807 | /** | |
1808 | * ata_dev_configure - Configure the specified ATA/ATAPI device | |
1809 | * @dev: Target device to configure | |
1810 | * | |
1811 | * Configure @dev according to @dev->id. Generic and low-level | |
1812 | * driver specific fixups are also applied. | |
1813 | * | |
1814 | * LOCKING: | |
1815 | * Kernel thread context (may sleep) | |
1816 | * | |
1817 | * RETURNS: | |
1818 | * 0 on success, -errno otherwise | |
1819 | */ | |
1820 | int ata_dev_configure(struct ata_device *dev) | |
1821 | { | |
1822 | struct ata_port *ap = dev->link->ap; | |
1823 | struct ata_eh_context *ehc = &dev->link->eh_context; | |
1824 | int print_info = ehc->i.flags & ATA_EHI_PRINTINFO; | |
1825 | const u16 *id = dev->id; | |
1826 | unsigned int xfer_mask; | |
1827 | char revbuf[7]; /* XYZ-99\0 */ | |
1828 | char fwrevbuf[ATA_ID_FW_REV_LEN+1]; | |
1829 | char modelbuf[ATA_ID_PROD_LEN+1]; | |
1830 | int rc; | |
1831 | ||
1832 | if (!ata_dev_enabled(dev) && ata_msg_info(ap)) { | |
1833 | ata_dev_printk(dev, KERN_INFO, "%s: ENTER/EXIT -- nodev\n", | |
1834 | __FUNCTION__); | |
1835 | return 0; | |
1836 | } | |
1837 | ||
1838 | if (ata_msg_probe(ap)) | |
1839 | ata_dev_printk(dev, KERN_DEBUG, "%s: ENTER\n", __FUNCTION__); | |
1840 | ||
1841 | /* set horkage */ | |
1842 | dev->horkage |= ata_dev_blacklisted(dev); | |
1843 | ||
1844 | /* let ACPI work its magic */ | |
1845 | rc = ata_acpi_on_devcfg(dev); | |
1846 | if (rc) | |
1847 | return rc; | |
1848 | ||
1849 | /* print device capabilities */ | |
1850 | if (ata_msg_probe(ap)) | |
1851 | ata_dev_printk(dev, KERN_DEBUG, | |
1852 | "%s: cfg 49:%04x 82:%04x 83:%04x 84:%04x " | |
1853 | "85:%04x 86:%04x 87:%04x 88:%04x\n", | |
1854 | __FUNCTION__, | |
1855 | id[49], id[82], id[83], id[84], | |
1856 | id[85], id[86], id[87], id[88]); | |
1857 | ||
1858 | /* initialize to-be-configured parameters */ | |
1859 | dev->flags &= ~ATA_DFLAG_CFG_MASK; | |
1860 | dev->max_sectors = 0; | |
1861 | dev->cdb_len = 0; | |
1862 | dev->n_sectors = 0; | |
1863 | dev->cylinders = 0; | |
1864 | dev->heads = 0; | |
1865 | dev->sectors = 0; | |
1866 | ||
1867 | /* | |
1868 | * common ATA, ATAPI feature tests | |
1869 | */ | |
1870 | ||
1871 | /* find max transfer mode; for printk only */ | |
1872 | xfer_mask = ata_id_xfermask(id); | |
1873 | ||
1874 | if (ata_msg_probe(ap)) | |
1875 | ata_dump_id(id); | |
1876 | ||
1877 | /* SCSI only uses 4-char revisions, dump full 8 chars from ATA */ | |
1878 | ata_id_c_string(dev->id, fwrevbuf, ATA_ID_FW_REV, | |
1879 | sizeof(fwrevbuf)); | |
1880 | ||
1881 | ata_id_c_string(dev->id, modelbuf, ATA_ID_PROD, | |
1882 | sizeof(modelbuf)); | |
1883 | ||
1884 | /* ATA-specific feature tests */ | |
1885 | if (dev->class == ATA_DEV_ATA) { | |
1886 | if (ata_id_is_cfa(id)) { | |
1887 | if (id[162] & 1) /* CPRM may make this media unusable */ | |
1888 | ata_dev_printk(dev, KERN_WARNING, | |
1889 | "supports DRM functions and may " | |
1890 | "not be fully accessable.\n"); | |
1891 | snprintf(revbuf, 7, "CFA"); | |
1892 | } | |
1893 | else | |
1894 | snprintf(revbuf, 7, "ATA-%d", ata_id_major_version(id)); | |
1895 | ||
1896 | dev->n_sectors = ata_id_n_sectors(id); | |
1897 | ||
1898 | if (dev->id[59] & 0x100) | |
1899 | dev->multi_count = dev->id[59] & 0xff; | |
1900 | ||
1901 | if (ata_id_has_lba(id)) { | |
1902 | const char *lba_desc; | |
1903 | char ncq_desc[20]; | |
1904 | ||
1905 | lba_desc = "LBA"; | |
1906 | dev->flags |= ATA_DFLAG_LBA; | |
1907 | if (ata_id_has_lba48(id)) { | |
1908 | dev->flags |= ATA_DFLAG_LBA48; | |
1909 | lba_desc = "LBA48"; | |
1910 | ||
1911 | if (dev->n_sectors >= (1UL << 28) && | |
1912 | ata_id_has_flush_ext(id)) | |
1913 | dev->flags |= ATA_DFLAG_FLUSH_EXT; | |
1914 | } | |
1915 | ||
1916 | if (!(dev->horkage & ATA_HORKAGE_BROKEN_HPA) && | |
1917 | ata_id_hpa_enabled(dev->id)) | |
1918 | dev->n_sectors = ata_hpa_resize(dev); | |
1919 | ||
1920 | /* config NCQ */ | |
1921 | ata_dev_config_ncq(dev, ncq_desc, sizeof(ncq_desc)); | |
1922 | ||
1923 | /* print device info to dmesg */ | |
1924 | if (ata_msg_drv(ap) && print_info) { | |
1925 | ata_dev_printk(dev, KERN_INFO, | |
1926 | "%s: %s, %s, max %s\n", | |
1927 | revbuf, modelbuf, fwrevbuf, | |
1928 | ata_mode_string(xfer_mask)); | |
1929 | ata_dev_printk(dev, KERN_INFO, | |
1930 | "%Lu sectors, multi %u: %s %s\n", | |
1931 | (unsigned long long)dev->n_sectors, | |
1932 | dev->multi_count, lba_desc, ncq_desc); | |
1933 | } | |
1934 | } else { | |
1935 | /* CHS */ | |
1936 | ||
1937 | /* Default translation */ | |
1938 | dev->cylinders = id[1]; | |
1939 | dev->heads = id[3]; | |
1940 | dev->sectors = id[6]; | |
1941 | ||
1942 | if (ata_id_current_chs_valid(id)) { | |
1943 | /* Current CHS translation is valid. */ | |
1944 | dev->cylinders = id[54]; | |
1945 | dev->heads = id[55]; | |
1946 | dev->sectors = id[56]; | |
1947 | } | |
1948 | ||
1949 | /* print device info to dmesg */ | |
1950 | if (ata_msg_drv(ap) && print_info) { | |
1951 | ata_dev_printk(dev, KERN_INFO, | |
1952 | "%s: %s, %s, max %s\n", | |
1953 | revbuf, modelbuf, fwrevbuf, | |
1954 | ata_mode_string(xfer_mask)); | |
1955 | ata_dev_printk(dev, KERN_INFO, | |
1956 | "%Lu sectors, multi %u, CHS %u/%u/%u\n", | |
1957 | (unsigned long long)dev->n_sectors, | |
1958 | dev->multi_count, dev->cylinders, | |
1959 | dev->heads, dev->sectors); | |
1960 | } | |
1961 | } | |
1962 | ||
1963 | dev->cdb_len = 16; | |
1964 | } | |
1965 | ||
1966 | /* ATAPI-specific feature tests */ | |
1967 | else if (dev->class == ATA_DEV_ATAPI) { | |
1968 | char *cdb_intr_string = ""; | |
1969 | ||
1970 | rc = atapi_cdb_len(id); | |
1971 | if ((rc < 12) || (rc > ATAPI_CDB_LEN)) { | |
1972 | if (ata_msg_warn(ap)) | |
1973 | ata_dev_printk(dev, KERN_WARNING, | |
1974 | "unsupported CDB len\n"); | |
1975 | rc = -EINVAL; | |
1976 | goto err_out_nosup; | |
1977 | } | |
1978 | dev->cdb_len = (unsigned int) rc; | |
1979 | ||
1980 | if (ata_id_cdb_intr(dev->id)) { | |
1981 | dev->flags |= ATA_DFLAG_CDB_INTR; | |
1982 | cdb_intr_string = ", CDB intr"; | |
1983 | } | |
1984 | ||
1985 | /* print device info to dmesg */ | |
1986 | if (ata_msg_drv(ap) && print_info) | |
1987 | ata_dev_printk(dev, KERN_INFO, | |
1988 | "ATAPI: %s, %s, max %s%s\n", | |
1989 | modelbuf, fwrevbuf, | |
1990 | ata_mode_string(xfer_mask), | |
1991 | cdb_intr_string); | |
1992 | } | |
1993 | ||
1994 | /* determine max_sectors */ | |
1995 | dev->max_sectors = ATA_MAX_SECTORS; | |
1996 | if (dev->flags & ATA_DFLAG_LBA48) | |
1997 | dev->max_sectors = ATA_MAX_SECTORS_LBA48; | |
1998 | ||
1999 | if (dev->horkage & ATA_HORKAGE_DIAGNOSTIC) { | |
2000 | /* Let the user know. We don't want to disallow opens for | |
2001 | rescue purposes, or in case the vendor is just a blithering | |
2002 | idiot */ | |
2003 | if (print_info) { | |
2004 | ata_dev_printk(dev, KERN_WARNING, | |
2005 | "Drive reports diagnostics failure. This may indicate a drive\n"); | |
2006 | ata_dev_printk(dev, KERN_WARNING, | |
2007 | "fault or invalid emulation. Contact drive vendor for information.\n"); | |
2008 | } | |
2009 | } | |
2010 | ||
2011 | /* limit bridge transfers to udma5, 200 sectors */ | |
2012 | if (ata_dev_knobble(dev)) { | |
2013 | if (ata_msg_drv(ap) && print_info) | |
2014 | ata_dev_printk(dev, KERN_INFO, | |
2015 | "applying bridge limits\n"); | |
2016 | dev->udma_mask &= ATA_UDMA5; | |
2017 | dev->max_sectors = ATA_MAX_SECTORS; | |
2018 | } | |
2019 | ||
2020 | if (dev->horkage & ATA_HORKAGE_MAX_SEC_128) | |
2021 | dev->max_sectors = min_t(unsigned int, ATA_MAX_SECTORS_128, | |
2022 | dev->max_sectors); | |
2023 | ||
2024 | if (ap->ops->dev_config) | |
2025 | ap->ops->dev_config(dev); | |
2026 | ||
2027 | if (ata_msg_probe(ap)) | |
2028 | ata_dev_printk(dev, KERN_DEBUG, "%s: EXIT, drv_stat = 0x%x\n", | |
2029 | __FUNCTION__, ata_chk_status(ap)); | |
2030 | return 0; | |
2031 | ||
2032 | err_out_nosup: | |
2033 | if (ata_msg_probe(ap)) | |
2034 | ata_dev_printk(dev, KERN_DEBUG, | |
2035 | "%s: EXIT, err\n", __FUNCTION__); | |
2036 | return rc; | |
2037 | } | |
2038 | ||
2039 | /** | |
2040 | * ata_cable_40wire - return 40 wire cable type | |
2041 | * @ap: port | |
2042 | * | |
2043 | * Helper method for drivers which want to hardwire 40 wire cable | |
2044 | * detection. | |
2045 | */ | |
2046 | ||
2047 | int ata_cable_40wire(struct ata_port *ap) | |
2048 | { | |
2049 | return ATA_CBL_PATA40; | |
2050 | } | |
2051 | ||
2052 | /** | |
2053 | * ata_cable_80wire - return 80 wire cable type | |
2054 | * @ap: port | |
2055 | * | |
2056 | * Helper method for drivers which want to hardwire 80 wire cable | |
2057 | * detection. | |
2058 | */ | |
2059 | ||
2060 | int ata_cable_80wire(struct ata_port *ap) | |
2061 | { | |
2062 | return ATA_CBL_PATA80; | |
2063 | } | |
2064 | ||
2065 | /** | |
2066 | * ata_cable_unknown - return unknown PATA cable. | |
2067 | * @ap: port | |
2068 | * | |
2069 | * Helper method for drivers which have no PATA cable detection. | |
2070 | */ | |
2071 | ||
2072 | int ata_cable_unknown(struct ata_port *ap) | |
2073 | { | |
2074 | return ATA_CBL_PATA_UNK; | |
2075 | } | |
2076 | ||
2077 | /** | |
2078 | * ata_cable_sata - return SATA cable type | |
2079 | * @ap: port | |
2080 | * | |
2081 | * Helper method for drivers which have SATA cables | |
2082 | */ | |
2083 | ||
2084 | int ata_cable_sata(struct ata_port *ap) | |
2085 | { | |
2086 | return ATA_CBL_SATA; | |
2087 | } | |
2088 | ||
2089 | /** | |
2090 | * ata_bus_probe - Reset and probe ATA bus | |
2091 | * @ap: Bus to probe | |
2092 | * | |
2093 | * Master ATA bus probing function. Initiates a hardware-dependent | |
2094 | * bus reset, then attempts to identify any devices found on | |
2095 | * the bus. | |
2096 | * | |
2097 | * LOCKING: | |
2098 | * PCI/etc. bus probe sem. | |
2099 | * | |
2100 | * RETURNS: | |
2101 | * Zero on success, negative errno otherwise. | |
2102 | */ | |
2103 | ||
2104 | int ata_bus_probe(struct ata_port *ap) | |
2105 | { | |
2106 | unsigned int classes[ATA_MAX_DEVICES]; | |
2107 | int tries[ATA_MAX_DEVICES]; | |
2108 | int rc; | |
2109 | struct ata_device *dev; | |
2110 | ||
2111 | ata_port_probe(ap); | |
2112 | ||
2113 | ata_link_for_each_dev(dev, &ap->link) | |
2114 | tries[dev->devno] = ATA_PROBE_MAX_TRIES; | |
2115 | ||
2116 | retry: | |
2117 | /* reset and determine device classes */ | |
2118 | ap->ops->phy_reset(ap); | |
2119 | ||
2120 | ata_link_for_each_dev(dev, &ap->link) { | |
2121 | if (!(ap->flags & ATA_FLAG_DISABLED) && | |
2122 | dev->class != ATA_DEV_UNKNOWN) | |
2123 | classes[dev->devno] = dev->class; | |
2124 | else | |
2125 | classes[dev->devno] = ATA_DEV_NONE; | |
2126 | ||
2127 | dev->class = ATA_DEV_UNKNOWN; | |
2128 | } | |
2129 | ||
2130 | ata_port_probe(ap); | |
2131 | ||
2132 | /* after the reset the device state is PIO 0 and the controller | |
2133 | state is undefined. Record the mode */ | |
2134 | ||
2135 | ata_link_for_each_dev(dev, &ap->link) | |
2136 | dev->pio_mode = XFER_PIO_0; | |
2137 | ||
2138 | /* read IDENTIFY page and configure devices. We have to do the identify | |
2139 | specific sequence bass-ackwards so that PDIAG- is released by | |
2140 | the slave device */ | |
2141 | ||
2142 | ata_link_for_each_dev(dev, &ap->link) { | |
2143 | if (tries[dev->devno]) | |
2144 | dev->class = classes[dev->devno]; | |
2145 | ||
2146 | if (!ata_dev_enabled(dev)) | |
2147 | continue; | |
2148 | ||
2149 | rc = ata_dev_read_id(dev, &dev->class, ATA_READID_POSTRESET, | |
2150 | dev->id); | |
2151 | if (rc) | |
2152 | goto fail; | |
2153 | } | |
2154 | ||
2155 | /* Now ask for the cable type as PDIAG- should have been released */ | |
2156 | if (ap->ops->cable_detect) | |
2157 | ap->cbl = ap->ops->cable_detect(ap); | |
2158 | ||
2159 | /* After the identify sequence we can now set up the devices. We do | |
2160 | this in the normal order so that the user doesn't get confused */ | |
2161 | ||
2162 | ata_link_for_each_dev(dev, &ap->link) { | |
2163 | if (!ata_dev_enabled(dev)) | |
2164 | continue; | |
2165 | ||
2166 | ap->link.eh_context.i.flags |= ATA_EHI_PRINTINFO; | |
2167 | rc = ata_dev_configure(dev); | |
2168 | ap->link.eh_context.i.flags &= ~ATA_EHI_PRINTINFO; | |
2169 | if (rc) | |
2170 | goto fail; | |
2171 | } | |
2172 | ||
2173 | /* configure transfer mode */ | |
2174 | rc = ata_set_mode(&ap->link, &dev); | |
2175 | if (rc) | |
2176 | goto fail; | |
2177 | ||
2178 | ata_link_for_each_dev(dev, &ap->link) | |
2179 | if (ata_dev_enabled(dev)) | |
2180 | return 0; | |
2181 | ||
2182 | /* no device present, disable port */ | |
2183 | ata_port_disable(ap); | |
2184 | ap->ops->port_disable(ap); | |
2185 | return -ENODEV; | |
2186 | ||
2187 | fail: | |
2188 | tries[dev->devno]--; | |
2189 | ||
2190 | switch (rc) { | |
2191 | case -EINVAL: | |
2192 | /* eeek, something went very wrong, give up */ | |
2193 | tries[dev->devno] = 0; | |
2194 | break; | |
2195 | ||
2196 | case -ENODEV: | |
2197 | /* give it just one more chance */ | |
2198 | tries[dev->devno] = min(tries[dev->devno], 1); | |
2199 | case -EIO: | |
2200 | if (tries[dev->devno] == 1) { | |
2201 | /* This is the last chance, better to slow | |
2202 | * down than lose it. | |
2203 | */ | |
2204 | sata_down_spd_limit(&ap->link); | |
2205 | ata_down_xfermask_limit(dev, ATA_DNXFER_PIO); | |
2206 | } | |
2207 | } | |
2208 | ||
2209 | if (!tries[dev->devno]) | |
2210 | ata_dev_disable(dev); | |
2211 | ||
2212 | goto retry; | |
2213 | } | |
2214 | ||
2215 | /** | |
2216 | * ata_port_probe - Mark port as enabled | |
2217 | * @ap: Port for which we indicate enablement | |
2218 | * | |
2219 | * Modify @ap data structure such that the system | |
2220 | * thinks that the entire port is enabled. | |
2221 | * | |
2222 | * LOCKING: host lock, or some other form of | |
2223 | * serialization. | |
2224 | */ | |
2225 | ||
2226 | void ata_port_probe(struct ata_port *ap) | |
2227 | { | |
2228 | ap->flags &= ~ATA_FLAG_DISABLED; | |
2229 | } | |
2230 | ||
2231 | /** | |
2232 | * sata_print_link_status - Print SATA link status | |
2233 | * @link: SATA link to printk link status about | |
2234 | * | |
2235 | * This function prints link speed and status of a SATA link. | |
2236 | * | |
2237 | * LOCKING: | |
2238 | * None. | |
2239 | */ | |
2240 | void sata_print_link_status(struct ata_link *link) | |
2241 | { | |
2242 | u32 sstatus, scontrol, tmp; | |
2243 | ||
2244 | if (sata_scr_read(link, SCR_STATUS, &sstatus)) | |
2245 | return; | |
2246 | sata_scr_read(link, SCR_CONTROL, &scontrol); | |
2247 | ||
2248 | if (ata_link_online(link)) { | |
2249 | tmp = (sstatus >> 4) & 0xf; | |
2250 | ata_link_printk(link, KERN_INFO, | |
2251 | "SATA link up %s (SStatus %X SControl %X)\n", | |
2252 | sata_spd_string(tmp), sstatus, scontrol); | |
2253 | } else { | |
2254 | ata_link_printk(link, KERN_INFO, | |
2255 | "SATA link down (SStatus %X SControl %X)\n", | |
2256 | sstatus, scontrol); | |
2257 | } | |
2258 | } | |
2259 | ||
2260 | /** | |
2261 | * __sata_phy_reset - Wake/reset a low-level SATA PHY | |
2262 | * @ap: SATA port associated with target SATA PHY. | |
2263 | * | |
2264 | * This function issues commands to standard SATA Sxxx | |
2265 | * PHY registers, to wake up the phy (and device), and | |
2266 | * clear any reset condition. | |
2267 | * | |
2268 | * LOCKING: | |
2269 | * PCI/etc. bus probe sem. | |
2270 | * | |
2271 | */ | |
2272 | void __sata_phy_reset(struct ata_port *ap) | |
2273 | { | |
2274 | struct ata_link *link = &ap->link; | |
2275 | unsigned long timeout = jiffies + (HZ * 5); | |
2276 | u32 sstatus; | |
2277 | ||
2278 | if (ap->flags & ATA_FLAG_SATA_RESET) { | |
2279 | /* issue phy wake/reset */ | |
2280 | sata_scr_write_flush(link, SCR_CONTROL, 0x301); | |
2281 | /* Couldn't find anything in SATA I/II specs, but | |
2282 | * AHCI-1.1 10.4.2 says at least 1 ms. */ | |
2283 | mdelay(1); | |
2284 | } | |
2285 | /* phy wake/clear reset */ | |
2286 | sata_scr_write_flush(link, SCR_CONTROL, 0x300); | |
2287 | ||
2288 | /* wait for phy to become ready, if necessary */ | |
2289 | do { | |
2290 | msleep(200); | |
2291 | sata_scr_read(link, SCR_STATUS, &sstatus); | |
2292 | if ((sstatus & 0xf) != 1) | |
2293 | break; | |
2294 | } while (time_before(jiffies, timeout)); | |
2295 | ||
2296 | /* print link status */ | |
2297 | sata_print_link_status(link); | |
2298 | ||
2299 | /* TODO: phy layer with polling, timeouts, etc. */ | |
2300 | if (!ata_link_offline(link)) | |
2301 | ata_port_probe(ap); | |
2302 | else | |
2303 | ata_port_disable(ap); | |
2304 | ||
2305 | if (ap->flags & ATA_FLAG_DISABLED) | |
2306 | return; | |
2307 | ||
2308 | if (ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT)) { | |
2309 | ata_port_disable(ap); | |
2310 | return; | |
2311 | } | |
2312 | ||
2313 | ap->cbl = ATA_CBL_SATA; | |
2314 | } | |
2315 | ||
2316 | /** | |
2317 | * sata_phy_reset - Reset SATA bus. | |
2318 | * @ap: SATA port associated with target SATA PHY. | |
2319 | * | |
2320 | * This function resets the SATA bus, and then probes | |
2321 | * the bus for devices. | |
2322 | * | |
2323 | * LOCKING: | |
2324 | * PCI/etc. bus probe sem. | |
2325 | * | |
2326 | */ | |
2327 | void sata_phy_reset(struct ata_port *ap) | |
2328 | { | |
2329 | __sata_phy_reset(ap); | |
2330 | if (ap->flags & ATA_FLAG_DISABLED) | |
2331 | return; | |
2332 | ata_bus_reset(ap); | |
2333 | } | |
2334 | ||
2335 | /** | |
2336 | * ata_dev_pair - return other device on cable | |
2337 | * @adev: device | |
2338 | * | |
2339 | * Obtain the other device on the same cable, or if none is | |
2340 | * present NULL is returned | |
2341 | */ | |
2342 | ||
2343 | struct ata_device *ata_dev_pair(struct ata_device *adev) | |
2344 | { | |
2345 | struct ata_link *link = adev->link; | |
2346 | struct ata_device *pair = &link->device[1 - adev->devno]; | |
2347 | if (!ata_dev_enabled(pair)) | |
2348 | return NULL; | |
2349 | return pair; | |
2350 | } | |
2351 | ||
2352 | /** | |
2353 | * ata_port_disable - Disable port. | |
2354 | * @ap: Port to be disabled. | |
2355 | * | |
2356 | * Modify @ap data structure such that the system | |
2357 | * thinks that the entire port is disabled, and should | |
2358 | * never attempt to probe or communicate with devices | |
2359 | * on this port. | |
2360 | * | |
2361 | * LOCKING: host lock, or some other form of | |
2362 | * serialization. | |
2363 | */ | |
2364 | ||
2365 | void ata_port_disable(struct ata_port *ap) | |
2366 | { | |
2367 | ap->link.device[0].class = ATA_DEV_NONE; | |
2368 | ap->link.device[1].class = ATA_DEV_NONE; | |
2369 | ap->flags |= ATA_FLAG_DISABLED; | |
2370 | } | |
2371 | ||
2372 | /** | |
2373 | * sata_down_spd_limit - adjust SATA spd limit downward | |
2374 | * @link: Link to adjust SATA spd limit for | |
2375 | * | |
2376 | * Adjust SATA spd limit of @link downward. Note that this | |
2377 | * function only adjusts the limit. The change must be applied | |
2378 | * using sata_set_spd(). | |
2379 | * | |
2380 | * LOCKING: | |
2381 | * Inherited from caller. | |
2382 | * | |
2383 | * RETURNS: | |
2384 | * 0 on success, negative errno on failure | |
2385 | */ | |
2386 | int sata_down_spd_limit(struct ata_link *link) | |
2387 | { | |
2388 | u32 sstatus, spd, mask; | |
2389 | int rc, highbit; | |
2390 | ||
2391 | if (!sata_scr_valid(link)) | |
2392 | return -EOPNOTSUPP; | |
2393 | ||
2394 | /* If SCR can be read, use it to determine the current SPD. | |
2395 | * If not, use cached value in link->sata_spd. | |
2396 | */ | |
2397 | rc = sata_scr_read(link, SCR_STATUS, &sstatus); | |
2398 | if (rc == 0) | |
2399 | spd = (sstatus >> 4) & 0xf; | |
2400 | else | |
2401 | spd = link->sata_spd; | |
2402 | ||
2403 | mask = link->sata_spd_limit; | |
2404 | if (mask <= 1) | |
2405 | return -EINVAL; | |
2406 | ||
2407 | /* unconditionally mask off the highest bit */ | |
2408 | highbit = fls(mask) - 1; | |
2409 | mask &= ~(1 << highbit); | |
2410 | ||
2411 | /* Mask off all speeds higher than or equal to the current | |
2412 | * one. Force 1.5Gbps if current SPD is not available. | |
2413 | */ | |
2414 | if (spd > 1) | |
2415 | mask &= (1 << (spd - 1)) - 1; | |
2416 | else | |
2417 | mask &= 1; | |
2418 | ||
2419 | /* were we already at the bottom? */ | |
2420 | if (!mask) | |
2421 | return -EINVAL; | |
2422 | ||
2423 | link->sata_spd_limit = mask; | |
2424 | ||
2425 | ata_link_printk(link, KERN_WARNING, "limiting SATA link speed to %s\n", | |
2426 | sata_spd_string(fls(mask))); | |
2427 | ||
2428 | return 0; | |
2429 | } | |
2430 | ||
2431 | static int __sata_set_spd_needed(struct ata_link *link, u32 *scontrol) | |
2432 | { | |
2433 | u32 spd, limit; | |
2434 | ||
2435 | if (link->sata_spd_limit == UINT_MAX) | |
2436 | limit = 0; | |
2437 | else | |
2438 | limit = fls(link->sata_spd_limit); | |
2439 | ||
2440 | spd = (*scontrol >> 4) & 0xf; | |
2441 | *scontrol = (*scontrol & ~0xf0) | ((limit & 0xf) << 4); | |
2442 | ||
2443 | return spd != limit; | |
2444 | } | |
2445 | ||
2446 | /** | |
2447 | * sata_set_spd_needed - is SATA spd configuration needed | |
2448 | * @link: Link in question | |
2449 | * | |
2450 | * Test whether the spd limit in SControl matches | |
2451 | * @link->sata_spd_limit. This function is used to determine | |
2452 | * whether hardreset is necessary to apply SATA spd | |
2453 | * configuration. | |
2454 | * | |
2455 | * LOCKING: | |
2456 | * Inherited from caller. | |
2457 | * | |
2458 | * RETURNS: | |
2459 | * 1 if SATA spd configuration is needed, 0 otherwise. | |
2460 | */ | |
2461 | int sata_set_spd_needed(struct ata_link *link) | |
2462 | { | |
2463 | u32 scontrol; | |
2464 | ||
2465 | if (sata_scr_read(link, SCR_CONTROL, &scontrol)) | |
2466 | return 0; | |
2467 | ||
2468 | return __sata_set_spd_needed(link, &scontrol); | |
2469 | } | |
2470 | ||
2471 | /** | |
2472 | * sata_set_spd - set SATA spd according to spd limit | |
2473 | * @link: Link to set SATA spd for | |
2474 | * | |
2475 | * Set SATA spd of @link according to sata_spd_limit. | |
2476 | * | |
2477 | * LOCKING: | |
2478 | * Inherited from caller. | |
2479 | * | |
2480 | * RETURNS: | |
2481 | * 0 if spd doesn't need to be changed, 1 if spd has been | |
2482 | * changed. Negative errno if SCR registers are inaccessible. | |
2483 | */ | |
2484 | int sata_set_spd(struct ata_link *link) | |
2485 | { | |
2486 | u32 scontrol; | |
2487 | int rc; | |
2488 | ||
2489 | if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol))) | |
2490 | return rc; | |
2491 | ||
2492 | if (!__sata_set_spd_needed(link, &scontrol)) | |
2493 | return 0; | |
2494 | ||
2495 | if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol))) | |
2496 | return rc; | |
2497 | ||
2498 | return 1; | |
2499 | } | |
2500 | ||
2501 | /* | |
2502 | * This mode timing computation functionality is ported over from | |
2503 | * drivers/ide/ide-timing.h and was originally written by Vojtech Pavlik | |
2504 | */ | |
2505 | /* | |
2506 | * PIO 0-4, MWDMA 0-2 and UDMA 0-6 timings (in nanoseconds). | |
2507 | * These were taken from ATA/ATAPI-6 standard, rev 0a, except | |
2508 | * for UDMA6, which is currently supported only by Maxtor drives. | |
2509 | * | |
2510 | * For PIO 5/6 MWDMA 3/4 see the CFA specification 3.0. | |
2511 | */ | |
2512 | ||
2513 | static const struct ata_timing ata_timing[] = { | |
2514 | ||
2515 | { XFER_UDMA_6, 0, 0, 0, 0, 0, 0, 0, 15 }, | |
2516 | { XFER_UDMA_5, 0, 0, 0, 0, 0, 0, 0, 20 }, | |
2517 | { XFER_UDMA_4, 0, 0, 0, 0, 0, 0, 0, 30 }, | |
2518 | { XFER_UDMA_3, 0, 0, 0, 0, 0, 0, 0, 45 }, | |
2519 | ||
2520 | { XFER_MW_DMA_4, 25, 0, 0, 0, 55, 20, 80, 0 }, | |
2521 | { XFER_MW_DMA_3, 25, 0, 0, 0, 65, 25, 100, 0 }, | |
2522 | { XFER_UDMA_2, 0, 0, 0, 0, 0, 0, 0, 60 }, | |
2523 | { XFER_UDMA_1, 0, 0, 0, 0, 0, 0, 0, 80 }, | |
2524 | { XFER_UDMA_0, 0, 0, 0, 0, 0, 0, 0, 120 }, | |
2525 | ||
2526 | /* { XFER_UDMA_SLOW, 0, 0, 0, 0, 0, 0, 0, 150 }, */ | |
2527 | ||
2528 | { XFER_MW_DMA_2, 25, 0, 0, 0, 70, 25, 120, 0 }, | |
2529 | { XFER_MW_DMA_1, 45, 0, 0, 0, 80, 50, 150, 0 }, | |
2530 | { XFER_MW_DMA_0, 60, 0, 0, 0, 215, 215, 480, 0 }, | |
2531 | ||
2532 | { XFER_SW_DMA_2, 60, 0, 0, 0, 120, 120, 240, 0 }, | |
2533 | { XFER_SW_DMA_1, 90, 0, 0, 0, 240, 240, 480, 0 }, | |
2534 | { XFER_SW_DMA_0, 120, 0, 0, 0, 480, 480, 960, 0 }, | |
2535 | ||
2536 | { XFER_PIO_6, 10, 55, 20, 80, 55, 20, 80, 0 }, | |
2537 | { XFER_PIO_5, 15, 65, 25, 100, 65, 25, 100, 0 }, | |
2538 | { XFER_PIO_4, 25, 70, 25, 120, 70, 25, 120, 0 }, | |
2539 | { XFER_PIO_3, 30, 80, 70, 180, 80, 70, 180, 0 }, | |
2540 | ||
2541 | { XFER_PIO_2, 30, 290, 40, 330, 100, 90, 240, 0 }, | |
2542 | { XFER_PIO_1, 50, 290, 93, 383, 125, 100, 383, 0 }, | |
2543 | { XFER_PIO_0, 70, 290, 240, 600, 165, 150, 600, 0 }, | |
2544 | ||
2545 | /* { XFER_PIO_SLOW, 120, 290, 240, 960, 290, 240, 960, 0 }, */ | |
2546 | ||
2547 | { 0xFF } | |
2548 | }; | |
2549 | ||
2550 | #define ENOUGH(v,unit) (((v)-1)/(unit)+1) | |
2551 | #define EZ(v,unit) ((v)?ENOUGH(v,unit):0) | |
2552 | ||
2553 | static void ata_timing_quantize(const struct ata_timing *t, struct ata_timing *q, int T, int UT) | |
2554 | { | |
2555 | q->setup = EZ(t->setup * 1000, T); | |
2556 | q->act8b = EZ(t->act8b * 1000, T); | |
2557 | q->rec8b = EZ(t->rec8b * 1000, T); | |
2558 | q->cyc8b = EZ(t->cyc8b * 1000, T); | |
2559 | q->active = EZ(t->active * 1000, T); | |
2560 | q->recover = EZ(t->recover * 1000, T); | |
2561 | q->cycle = EZ(t->cycle * 1000, T); | |
2562 | q->udma = EZ(t->udma * 1000, UT); | |
2563 | } | |
2564 | ||
2565 | void ata_timing_merge(const struct ata_timing *a, const struct ata_timing *b, | |
2566 | struct ata_timing *m, unsigned int what) | |
2567 | { | |
2568 | if (what & ATA_TIMING_SETUP ) m->setup = max(a->setup, b->setup); | |
2569 | if (what & ATA_TIMING_ACT8B ) m->act8b = max(a->act8b, b->act8b); | |
2570 | if (what & ATA_TIMING_REC8B ) m->rec8b = max(a->rec8b, b->rec8b); | |
2571 | if (what & ATA_TIMING_CYC8B ) m->cyc8b = max(a->cyc8b, b->cyc8b); | |
2572 | if (what & ATA_TIMING_ACTIVE ) m->active = max(a->active, b->active); | |
2573 | if (what & ATA_TIMING_RECOVER) m->recover = max(a->recover, b->recover); | |
2574 | if (what & ATA_TIMING_CYCLE ) m->cycle = max(a->cycle, b->cycle); | |
2575 | if (what & ATA_TIMING_UDMA ) m->udma = max(a->udma, b->udma); | |
2576 | } | |
2577 | ||
2578 | static const struct ata_timing* ata_timing_find_mode(unsigned short speed) | |
2579 | { | |
2580 | const struct ata_timing *t; | |
2581 | ||
2582 | for (t = ata_timing; t->mode != speed; t++) | |
2583 | if (t->mode == 0xFF) | |
2584 | return NULL; | |
2585 | return t; | |
2586 | } | |
2587 | ||
2588 | int ata_timing_compute(struct ata_device *adev, unsigned short speed, | |
2589 | struct ata_timing *t, int T, int UT) | |
2590 | { | |
2591 | const struct ata_timing *s; | |
2592 | struct ata_timing p; | |
2593 | ||
2594 | /* | |
2595 | * Find the mode. | |
2596 | */ | |
2597 | ||
2598 | if (!(s = ata_timing_find_mode(speed))) | |
2599 | return -EINVAL; | |
2600 | ||
2601 | memcpy(t, s, sizeof(*s)); | |
2602 | ||
2603 | /* | |
2604 | * If the drive is an EIDE drive, it can tell us it needs extended | |
2605 | * PIO/MW_DMA cycle timing. | |
2606 | */ | |
2607 | ||
2608 | if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE drive */ | |
2609 | memset(&p, 0, sizeof(p)); | |
2610 | if(speed >= XFER_PIO_0 && speed <= XFER_SW_DMA_0) { | |
2611 | if (speed <= XFER_PIO_2) p.cycle = p.cyc8b = adev->id[ATA_ID_EIDE_PIO]; | |
2612 | else p.cycle = p.cyc8b = adev->id[ATA_ID_EIDE_PIO_IORDY]; | |
2613 | } else if(speed >= XFER_MW_DMA_0 && speed <= XFER_MW_DMA_2) { | |
2614 | p.cycle = adev->id[ATA_ID_EIDE_DMA_MIN]; | |
2615 | } | |
2616 | ata_timing_merge(&p, t, t, ATA_TIMING_CYCLE | ATA_TIMING_CYC8B); | |
2617 | } | |
2618 | ||
2619 | /* | |
2620 | * Convert the timing to bus clock counts. | |
2621 | */ | |
2622 | ||
2623 | ata_timing_quantize(t, t, T, UT); | |
2624 | ||
2625 | /* | |
2626 | * Even in DMA/UDMA modes we still use PIO access for IDENTIFY, | |
2627 | * S.M.A.R.T * and some other commands. We have to ensure that the | |
2628 | * DMA cycle timing is slower/equal than the fastest PIO timing. | |
2629 | */ | |
2630 | ||
2631 | if (speed > XFER_PIO_6) { | |
2632 | ata_timing_compute(adev, adev->pio_mode, &p, T, UT); | |
2633 | ata_timing_merge(&p, t, t, ATA_TIMING_ALL); | |
2634 | } | |
2635 | ||
2636 | /* | |
2637 | * Lengthen active & recovery time so that cycle time is correct. | |
2638 | */ | |
2639 | ||
2640 | if (t->act8b + t->rec8b < t->cyc8b) { | |
2641 | t->act8b += (t->cyc8b - (t->act8b + t->rec8b)) / 2; | |
2642 | t->rec8b = t->cyc8b - t->act8b; | |
2643 | } | |
2644 | ||
2645 | if (t->active + t->recover < t->cycle) { | |
2646 | t->active += (t->cycle - (t->active + t->recover)) / 2; | |
2647 | t->recover = t->cycle - t->active; | |
2648 | } | |
2649 | ||
2650 | /* In a few cases quantisation may produce enough errors to | |
2651 | leave t->cycle too low for the sum of active and recovery | |
2652 | if so we must correct this */ | |
2653 | if (t->active + t->recover > t->cycle) | |
2654 | t->cycle = t->active + t->recover; | |
2655 | ||
2656 | return 0; | |
2657 | } | |
2658 | ||
2659 | /** | |
2660 | * ata_down_xfermask_limit - adjust dev xfer masks downward | |
2661 | * @dev: Device to adjust xfer masks | |
2662 | * @sel: ATA_DNXFER_* selector | |
2663 | * | |
2664 | * Adjust xfer masks of @dev downward. Note that this function | |
2665 | * does not apply the change. Invoking ata_set_mode() afterwards | |
2666 | * will apply the limit. | |
2667 | * | |
2668 | * LOCKING: | |
2669 | * Inherited from caller. | |
2670 | * | |
2671 | * RETURNS: | |
2672 | * 0 on success, negative errno on failure | |
2673 | */ | |
2674 | int ata_down_xfermask_limit(struct ata_device *dev, unsigned int sel) | |
2675 | { | |
2676 | char buf[32]; | |
2677 | unsigned int orig_mask, xfer_mask; | |
2678 | unsigned int pio_mask, mwdma_mask, udma_mask; | |
2679 | int quiet, highbit; | |
2680 | ||
2681 | quiet = !!(sel & ATA_DNXFER_QUIET); | |
2682 | sel &= ~ATA_DNXFER_QUIET; | |
2683 | ||
2684 | xfer_mask = orig_mask = ata_pack_xfermask(dev->pio_mask, | |
2685 | dev->mwdma_mask, | |
2686 | dev->udma_mask); | |
2687 | ata_unpack_xfermask(xfer_mask, &pio_mask, &mwdma_mask, &udma_mask); | |
2688 | ||
2689 | switch (sel) { | |
2690 | case ATA_DNXFER_PIO: | |
2691 | highbit = fls(pio_mask) - 1; | |
2692 | pio_mask &= ~(1 << highbit); | |
2693 | break; | |
2694 | ||
2695 | case ATA_DNXFER_DMA: | |
2696 | if (udma_mask) { | |
2697 | highbit = fls(udma_mask) - 1; | |
2698 | udma_mask &= ~(1 << highbit); | |
2699 | if (!udma_mask) | |
2700 | return -ENOENT; | |
2701 | } else if (mwdma_mask) { | |
2702 | highbit = fls(mwdma_mask) - 1; | |
2703 | mwdma_mask &= ~(1 << highbit); | |
2704 | if (!mwdma_mask) | |
2705 | return -ENOENT; | |
2706 | } | |
2707 | break; | |
2708 | ||
2709 | case ATA_DNXFER_40C: | |
2710 | udma_mask &= ATA_UDMA_MASK_40C; | |
2711 | break; | |
2712 | ||
2713 | case ATA_DNXFER_FORCE_PIO0: | |
2714 | pio_mask &= 1; | |
2715 | case ATA_DNXFER_FORCE_PIO: | |
2716 | mwdma_mask = 0; | |
2717 | udma_mask = 0; | |
2718 | break; | |
2719 | ||
2720 | default: | |
2721 | BUG(); | |
2722 | } | |
2723 | ||
2724 | xfer_mask &= ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask); | |
2725 | ||
2726 | if (!(xfer_mask & ATA_MASK_PIO) || xfer_mask == orig_mask) | |
2727 | return -ENOENT; | |
2728 | ||
2729 | if (!quiet) { | |
2730 | if (xfer_mask & (ATA_MASK_MWDMA | ATA_MASK_UDMA)) | |
2731 | snprintf(buf, sizeof(buf), "%s:%s", | |
2732 | ata_mode_string(xfer_mask), | |
2733 | ata_mode_string(xfer_mask & ATA_MASK_PIO)); | |
2734 | else | |
2735 | snprintf(buf, sizeof(buf), "%s", | |
2736 | ata_mode_string(xfer_mask)); | |
2737 | ||
2738 | ata_dev_printk(dev, KERN_WARNING, | |
2739 | "limiting speed to %s\n", buf); | |
2740 | } | |
2741 | ||
2742 | ata_unpack_xfermask(xfer_mask, &dev->pio_mask, &dev->mwdma_mask, | |
2743 | &dev->udma_mask); | |
2744 | ||
2745 | return 0; | |
2746 | } | |
2747 | ||
2748 | static int ata_dev_set_mode(struct ata_device *dev) | |
2749 | { | |
2750 | struct ata_eh_context *ehc = &dev->link->eh_context; | |
2751 | unsigned int err_mask; | |
2752 | int rc; | |
2753 | ||
2754 | dev->flags &= ~ATA_DFLAG_PIO; | |
2755 | if (dev->xfer_shift == ATA_SHIFT_PIO) | |
2756 | dev->flags |= ATA_DFLAG_PIO; | |
2757 | ||
2758 | err_mask = ata_dev_set_xfermode(dev); | |
2759 | /* Old CFA may refuse this command, which is just fine */ | |
2760 | if (dev->xfer_shift == ATA_SHIFT_PIO && ata_id_is_cfa(dev->id)) | |
2761 | err_mask &= ~AC_ERR_DEV; | |
2762 | /* Some very old devices and some bad newer ones fail any kind of | |
2763 | SET_XFERMODE request but support PIO0-2 timings and no IORDY */ | |
2764 | if (dev->xfer_shift == ATA_SHIFT_PIO && !ata_id_has_iordy(dev->id) && | |
2765 | dev->pio_mode <= XFER_PIO_2) | |
2766 | err_mask &= ~AC_ERR_DEV; | |
2767 | if (err_mask) { | |
2768 | ata_dev_printk(dev, KERN_ERR, "failed to set xfermode " | |
2769 | "(err_mask=0x%x)\n", err_mask); | |
2770 | return -EIO; | |
2771 | } | |
2772 | ||
2773 | ehc->i.flags |= ATA_EHI_POST_SETMODE; | |
2774 | rc = ata_dev_revalidate(dev, 0); | |
2775 | ehc->i.flags &= ~ATA_EHI_POST_SETMODE; | |
2776 | if (rc) | |
2777 | return rc; | |
2778 | ||
2779 | DPRINTK("xfer_shift=%u, xfer_mode=0x%x\n", | |
2780 | dev->xfer_shift, (int)dev->xfer_mode); | |
2781 | ||
2782 | ata_dev_printk(dev, KERN_INFO, "configured for %s\n", | |
2783 | ata_mode_string(ata_xfer_mode2mask(dev->xfer_mode))); | |
2784 | return 0; | |
2785 | } | |
2786 | ||
2787 | /** | |
2788 | * ata_do_set_mode - Program timings and issue SET FEATURES - XFER | |
2789 | * @link: link on which timings will be programmed | |
2790 | * @r_failed_dev: out paramter for failed device | |
2791 | * | |
2792 | * Standard implementation of the function used to tune and set | |
2793 | * ATA device disk transfer mode (PIO3, UDMA6, etc.). If | |
2794 | * ata_dev_set_mode() fails, pointer to the failing device is | |
2795 | * returned in @r_failed_dev. | |
2796 | * | |
2797 | * LOCKING: | |
2798 | * PCI/etc. bus probe sem. | |
2799 | * | |
2800 | * RETURNS: | |
2801 | * 0 on success, negative errno otherwise | |
2802 | */ | |
2803 | ||
2804 | int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev) | |
2805 | { | |
2806 | struct ata_port *ap = link->ap; | |
2807 | struct ata_device *dev; | |
2808 | int rc = 0, used_dma = 0, found = 0; | |
2809 | ||
2810 | /* step 1: calculate xfer_mask */ | |
2811 | ata_link_for_each_dev(dev, link) { | |
2812 | unsigned int pio_mask, dma_mask; | |
2813 | ||
2814 | if (!ata_dev_enabled(dev)) | |
2815 | continue; | |
2816 | ||
2817 | ata_dev_xfermask(dev); | |
2818 | ||
2819 | pio_mask = ata_pack_xfermask(dev->pio_mask, 0, 0); | |
2820 | dma_mask = ata_pack_xfermask(0, dev->mwdma_mask, dev->udma_mask); | |
2821 | dev->pio_mode = ata_xfer_mask2mode(pio_mask); | |
2822 | dev->dma_mode = ata_xfer_mask2mode(dma_mask); | |
2823 | ||
2824 | found = 1; | |
2825 | if (dev->dma_mode) | |
2826 | used_dma = 1; | |
2827 | } | |
2828 | if (!found) | |
2829 | goto out; | |
2830 | ||
2831 | /* step 2: always set host PIO timings */ | |
2832 | ata_link_for_each_dev(dev, link) { | |
2833 | if (!ata_dev_enabled(dev)) | |
2834 | continue; | |
2835 | ||
2836 | if (!dev->pio_mode) { | |
2837 | ata_dev_printk(dev, KERN_WARNING, "no PIO support\n"); | |
2838 | rc = -EINVAL; | |
2839 | goto out; | |
2840 | } | |
2841 | ||
2842 | dev->xfer_mode = dev->pio_mode; | |
2843 | dev->xfer_shift = ATA_SHIFT_PIO; | |
2844 | if (ap->ops->set_piomode) | |
2845 | ap->ops->set_piomode(ap, dev); | |
2846 | } | |
2847 | ||
2848 | /* step 3: set host DMA timings */ | |
2849 | ata_link_for_each_dev(dev, link) { | |
2850 | if (!ata_dev_enabled(dev) || !dev->dma_mode) | |
2851 | continue; | |
2852 | ||
2853 | dev->xfer_mode = dev->dma_mode; | |
2854 | dev->xfer_shift = ata_xfer_mode2shift(dev->dma_mode); | |
2855 | if (ap->ops->set_dmamode) | |
2856 | ap->ops->set_dmamode(ap, dev); | |
2857 | } | |
2858 | ||
2859 | /* step 4: update devices' xfer mode */ | |
2860 | ata_link_for_each_dev(dev, link) { | |
2861 | /* don't update suspended devices' xfer mode */ | |
2862 | if (!ata_dev_enabled(dev)) | |
2863 | continue; | |
2864 | ||
2865 | rc = ata_dev_set_mode(dev); | |
2866 | if (rc) | |
2867 | goto out; | |
2868 | } | |
2869 | ||
2870 | /* Record simplex status. If we selected DMA then the other | |
2871 | * host channels are not permitted to do so. | |
2872 | */ | |
2873 | if (used_dma && (ap->host->flags & ATA_HOST_SIMPLEX)) | |
2874 | ap->host->simplex_claimed = ap; | |
2875 | ||
2876 | out: | |
2877 | if (rc) | |
2878 | *r_failed_dev = dev; | |
2879 | return rc; | |
2880 | } | |
2881 | ||
2882 | /** | |
2883 | * ata_set_mode - Program timings and issue SET FEATURES - XFER | |
2884 | * @link: link on which timings will be programmed | |
2885 | * @r_failed_dev: out paramter for failed device | |
2886 | * | |
2887 | * Set ATA device disk transfer mode (PIO3, UDMA6, etc.). If | |
2888 | * ata_set_mode() fails, pointer to the failing device is | |
2889 | * returned in @r_failed_dev. | |
2890 | * | |
2891 | * LOCKING: | |
2892 | * PCI/etc. bus probe sem. | |
2893 | * | |
2894 | * RETURNS: | |
2895 | * 0 on success, negative errno otherwise | |
2896 | */ | |
2897 | int ata_set_mode(struct ata_link *link, struct ata_device **r_failed_dev) | |
2898 | { | |
2899 | struct ata_port *ap = link->ap; | |
2900 | ||
2901 | /* has private set_mode? */ | |
2902 | if (ap->ops->set_mode) | |
2903 | return ap->ops->set_mode(link, r_failed_dev); | |
2904 | return ata_do_set_mode(link, r_failed_dev); | |
2905 | } | |
2906 | ||
2907 | /** | |
2908 | * ata_tf_to_host - issue ATA taskfile to host controller | |
2909 | * @ap: port to which command is being issued | |
2910 | * @tf: ATA taskfile register set | |
2911 | * | |
2912 | * Issues ATA taskfile register set to ATA host controller, | |
2913 | * with proper synchronization with interrupt handler and | |
2914 | * other threads. | |
2915 | * | |
2916 | * LOCKING: | |
2917 | * spin_lock_irqsave(host lock) | |
2918 | */ | |
2919 | ||
2920 | static inline void ata_tf_to_host(struct ata_port *ap, | |
2921 | const struct ata_taskfile *tf) | |
2922 | { | |
2923 | ap->ops->tf_load(ap, tf); | |
2924 | ap->ops->exec_command(ap, tf); | |
2925 | } | |
2926 | ||
2927 | /** | |
2928 | * ata_busy_sleep - sleep until BSY clears, or timeout | |
2929 | * @ap: port containing status register to be polled | |
2930 | * @tmout_pat: impatience timeout | |
2931 | * @tmout: overall timeout | |
2932 | * | |
2933 | * Sleep until ATA Status register bit BSY clears, | |
2934 | * or a timeout occurs. | |
2935 | * | |
2936 | * LOCKING: | |
2937 | * Kernel thread context (may sleep). | |
2938 | * | |
2939 | * RETURNS: | |
2940 | * 0 on success, -errno otherwise. | |
2941 | */ | |
2942 | int ata_busy_sleep(struct ata_port *ap, | |
2943 | unsigned long tmout_pat, unsigned long tmout) | |
2944 | { | |
2945 | unsigned long timer_start, timeout; | |
2946 | u8 status; | |
2947 | ||
2948 | status = ata_busy_wait(ap, ATA_BUSY, 300); | |
2949 | timer_start = jiffies; | |
2950 | timeout = timer_start + tmout_pat; | |
2951 | while (status != 0xff && (status & ATA_BUSY) && | |
2952 | time_before(jiffies, timeout)) { | |
2953 | msleep(50); | |
2954 | status = ata_busy_wait(ap, ATA_BUSY, 3); | |
2955 | } | |
2956 | ||
2957 | if (status != 0xff && (status & ATA_BUSY)) | |
2958 | ata_port_printk(ap, KERN_WARNING, | |
2959 | "port is slow to respond, please be patient " | |
2960 | "(Status 0x%x)\n", status); | |
2961 | ||
2962 | timeout = timer_start + tmout; | |
2963 | while (status != 0xff && (status & ATA_BUSY) && | |
2964 | time_before(jiffies, timeout)) { | |
2965 | msleep(50); | |
2966 | status = ata_chk_status(ap); | |
2967 | } | |
2968 | ||
2969 | if (status == 0xff) | |
2970 | return -ENODEV; | |
2971 | ||
2972 | if (status & ATA_BUSY) { | |
2973 | ata_port_printk(ap, KERN_ERR, "port failed to respond " | |
2974 | "(%lu secs, Status 0x%x)\n", | |
2975 | tmout / HZ, status); | |
2976 | return -EBUSY; | |
2977 | } | |
2978 | ||
2979 | return 0; | |
2980 | } | |
2981 | ||
2982 | /** | |
2983 | * ata_wait_ready - sleep until BSY clears, or timeout | |
2984 | * @ap: port containing status register to be polled | |
2985 | * @deadline: deadline jiffies for the operation | |
2986 | * | |
2987 | * Sleep until ATA Status register bit BSY clears, or timeout | |
2988 | * occurs. | |
2989 | * | |
2990 | * LOCKING: | |
2991 | * Kernel thread context (may sleep). | |
2992 | * | |
2993 | * RETURNS: | |
2994 | * 0 on success, -errno otherwise. | |
2995 | */ | |
2996 | int ata_wait_ready(struct ata_port *ap, unsigned long deadline) | |
2997 | { | |
2998 | unsigned long start = jiffies; | |
2999 | int warned = 0; | |
3000 | ||
3001 | while (1) { | |
3002 | u8 status = ata_chk_status(ap); | |
3003 | unsigned long now = jiffies; | |
3004 | ||
3005 | if (!(status & ATA_BUSY)) | |
3006 | return 0; | |
3007 | if (!ata_link_online(&ap->link) && status == 0xff) | |
3008 | return -ENODEV; | |
3009 | if (time_after(now, deadline)) | |
3010 | return -EBUSY; | |
3011 | ||
3012 | if (!warned && time_after(now, start + 5 * HZ) && | |
3013 | (deadline - now > 3 * HZ)) { | |
3014 | ata_port_printk(ap, KERN_WARNING, | |
3015 | "port is slow to respond, please be patient " | |
3016 | "(Status 0x%x)\n", status); | |
3017 | warned = 1; | |
3018 | } | |
3019 | ||
3020 | msleep(50); | |
3021 | } | |
3022 | } | |
3023 | ||
3024 | static int ata_bus_post_reset(struct ata_port *ap, unsigned int devmask, | |
3025 | unsigned long deadline) | |
3026 | { | |
3027 | struct ata_ioports *ioaddr = &ap->ioaddr; | |
3028 | unsigned int dev0 = devmask & (1 << 0); | |
3029 | unsigned int dev1 = devmask & (1 << 1); | |
3030 | int rc, ret = 0; | |
3031 | ||
3032 | /* if device 0 was found in ata_devchk, wait for its | |
3033 | * BSY bit to clear | |
3034 | */ | |
3035 | if (dev0) { | |
3036 | rc = ata_wait_ready(ap, deadline); | |
3037 | if (rc) { | |
3038 | if (rc != -ENODEV) | |
3039 | return rc; | |
3040 | ret = rc; | |
3041 | } | |
3042 | } | |
3043 | ||
3044 | /* if device 1 was found in ata_devchk, wait for register | |
3045 | * access briefly, then wait for BSY to clear. | |
3046 | */ | |
3047 | if (dev1) { | |
3048 | int i; | |
3049 | ||
3050 | ap->ops->dev_select(ap, 1); | |
3051 | ||
3052 | /* Wait for register access. Some ATAPI devices fail | |
3053 | * to set nsect/lbal after reset, so don't waste too | |
3054 | * much time on it. We're gonna wait for !BSY anyway. | |
3055 | */ | |
3056 | for (i = 0; i < 2; i++) { | |
3057 | u8 nsect, lbal; | |
3058 | ||
3059 | nsect = ioread8(ioaddr->nsect_addr); | |
3060 | lbal = ioread8(ioaddr->lbal_addr); | |
3061 | if ((nsect == 1) && (lbal == 1)) | |
3062 | break; | |
3063 | msleep(50); /* give drive a breather */ | |
3064 | } | |
3065 | ||
3066 | rc = ata_wait_ready(ap, deadline); | |
3067 | if (rc) { | |
3068 | if (rc != -ENODEV) | |
3069 | return rc; | |
3070 | ret = rc; | |
3071 | } | |
3072 | } | |
3073 | ||
3074 | /* is all this really necessary? */ | |
3075 | ap->ops->dev_select(ap, 0); | |
3076 | if (dev1) | |
3077 | ap->ops->dev_select(ap, 1); | |
3078 | if (dev0) | |
3079 | ap->ops->dev_select(ap, 0); | |
3080 | ||
3081 | return ret; | |
3082 | } | |
3083 | ||
3084 | static int ata_bus_softreset(struct ata_port *ap, unsigned int devmask, | |
3085 | unsigned long deadline) | |
3086 | { | |
3087 | struct ata_ioports *ioaddr = &ap->ioaddr; | |
3088 | ||
3089 | DPRINTK("ata%u: bus reset via SRST\n", ap->print_id); | |
3090 | ||
3091 | /* software reset. causes dev0 to be selected */ | |
3092 | iowrite8(ap->ctl, ioaddr->ctl_addr); | |
3093 | udelay(20); /* FIXME: flush */ | |
3094 | iowrite8(ap->ctl | ATA_SRST, ioaddr->ctl_addr); | |
3095 | udelay(20); /* FIXME: flush */ | |
3096 | iowrite8(ap->ctl, ioaddr->ctl_addr); | |
3097 | ||
3098 | /* spec mandates ">= 2ms" before checking status. | |
3099 | * We wait 150ms, because that was the magic delay used for | |
3100 | * ATAPI devices in Hale Landis's ATADRVR, for the period of time | |
3101 | * between when the ATA command register is written, and then | |
3102 | * status is checked. Because waiting for "a while" before | |
3103 | * checking status is fine, post SRST, we perform this magic | |
3104 | * delay here as well. | |
3105 | * | |
3106 | * Old drivers/ide uses the 2mS rule and then waits for ready | |
3107 | */ | |
3108 | msleep(150); | |
3109 | ||
3110 | /* Before we perform post reset processing we want to see if | |
3111 | * the bus shows 0xFF because the odd clown forgets the D7 | |
3112 | * pulldown resistor. | |
3113 | */ | |
3114 | if (ata_check_status(ap) == 0xFF) | |
3115 | return -ENODEV; | |
3116 | ||
3117 | return ata_bus_post_reset(ap, devmask, deadline); | |
3118 | } | |
3119 | ||
3120 | /** | |
3121 | * ata_bus_reset - reset host port and associated ATA channel | |
3122 | * @ap: port to reset | |
3123 | * | |
3124 | * This is typically the first time we actually start issuing | |
3125 | * commands to the ATA channel. We wait for BSY to clear, then | |
3126 | * issue EXECUTE DEVICE DIAGNOSTIC command, polling for its | |
3127 | * result. Determine what devices, if any, are on the channel | |
3128 | * by looking at the device 0/1 error register. Look at the signature | |
3129 | * stored in each device's taskfile registers, to determine if | |
3130 | * the device is ATA or ATAPI. | |
3131 | * | |
3132 | * LOCKING: | |
3133 | * PCI/etc. bus probe sem. | |
3134 | * Obtains host lock. | |
3135 | * | |
3136 | * SIDE EFFECTS: | |
3137 | * Sets ATA_FLAG_DISABLED if bus reset fails. | |
3138 | */ | |
3139 | ||
3140 | void ata_bus_reset(struct ata_port *ap) | |
3141 | { | |
3142 | struct ata_device *device = ap->link.device; | |
3143 | struct ata_ioports *ioaddr = &ap->ioaddr; | |
3144 | unsigned int slave_possible = ap->flags & ATA_FLAG_SLAVE_POSS; | |
3145 | u8 err; | |
3146 | unsigned int dev0, dev1 = 0, devmask = 0; | |
3147 | int rc; | |
3148 | ||
3149 | DPRINTK("ENTER, host %u, port %u\n", ap->print_id, ap->port_no); | |
3150 | ||
3151 | /* determine if device 0/1 are present */ | |
3152 | if (ap->flags & ATA_FLAG_SATA_RESET) | |
3153 | dev0 = 1; | |
3154 | else { | |
3155 | dev0 = ata_devchk(ap, 0); | |
3156 | if (slave_possible) | |
3157 | dev1 = ata_devchk(ap, 1); | |
3158 | } | |
3159 | ||
3160 | if (dev0) | |
3161 | devmask |= (1 << 0); | |
3162 | if (dev1) | |
3163 | devmask |= (1 << 1); | |
3164 | ||
3165 | /* select device 0 again */ | |
3166 | ap->ops->dev_select(ap, 0); | |
3167 | ||
3168 | /* issue bus reset */ | |
3169 | if (ap->flags & ATA_FLAG_SRST) { | |
3170 | rc = ata_bus_softreset(ap, devmask, jiffies + 40 * HZ); | |
3171 | if (rc && rc != -ENODEV) | |
3172 | goto err_out; | |
3173 | } | |
3174 | ||
3175 | /* | |
3176 | * determine by signature whether we have ATA or ATAPI devices | |
3177 | */ | |
3178 | device[0].class = ata_dev_try_classify(ap, 0, &err); | |
3179 | if ((slave_possible) && (err != 0x81)) | |
3180 | device[1].class = ata_dev_try_classify(ap, 1, &err); | |
3181 | ||
3182 | /* is double-select really necessary? */ | |
3183 | if (device[1].class != ATA_DEV_NONE) | |
3184 | ap->ops->dev_select(ap, 1); | |
3185 | if (device[0].class != ATA_DEV_NONE) | |
3186 | ap->ops->dev_select(ap, 0); | |
3187 | ||
3188 | /* if no devices were detected, disable this port */ | |
3189 | if ((device[0].class == ATA_DEV_NONE) && | |
3190 | (device[1].class == ATA_DEV_NONE)) | |
3191 | goto err_out; | |
3192 | ||
3193 | if (ap->flags & (ATA_FLAG_SATA_RESET | ATA_FLAG_SRST)) { | |
3194 | /* set up device control for ATA_FLAG_SATA_RESET */ | |
3195 | iowrite8(ap->ctl, ioaddr->ctl_addr); | |
3196 | } | |
3197 | ||
3198 | DPRINTK("EXIT\n"); | |
3199 | return; | |
3200 | ||
3201 | err_out: | |
3202 | ata_port_printk(ap, KERN_ERR, "disabling port\n"); | |
3203 | ap->ops->port_disable(ap); | |
3204 | ||
3205 | DPRINTK("EXIT\n"); | |
3206 | } | |
3207 | ||
3208 | /** | |
3209 | * sata_link_debounce - debounce SATA phy status | |
3210 | * @link: ATA link to debounce SATA phy status for | |
3211 | * @params: timing parameters { interval, duratinon, timeout } in msec | |
3212 | * @deadline: deadline jiffies for the operation | |
3213 | * | |
3214 | * Make sure SStatus of @link reaches stable state, determined by | |
3215 | * holding the same value where DET is not 1 for @duration polled | |
3216 | * every @interval, before @timeout. Timeout constraints the | |
3217 | * beginning of the stable state. Because DET gets stuck at 1 on | |
3218 | * some controllers after hot unplugging, this functions waits | |
3219 | * until timeout then returns 0 if DET is stable at 1. | |
3220 | * | |
3221 | * @timeout is further limited by @deadline. The sooner of the | |
3222 | * two is used. | |
3223 | * | |
3224 | * LOCKING: | |
3225 | * Kernel thread context (may sleep) | |
3226 | * | |
3227 | * RETURNS: | |
3228 | * 0 on success, -errno on failure. | |
3229 | */ | |
3230 | int sata_link_debounce(struct ata_link *link, const unsigned long *params, | |
3231 | unsigned long deadline) | |
3232 | { | |
3233 | unsigned long interval_msec = params[0]; | |
3234 | unsigned long duration = msecs_to_jiffies(params[1]); | |
3235 | unsigned long last_jiffies, t; | |
3236 | u32 last, cur; | |
3237 | int rc; | |
3238 | ||
3239 | t = jiffies + msecs_to_jiffies(params[2]); | |
3240 | if (time_before(t, deadline)) | |
3241 | deadline = t; | |
3242 | ||
3243 | if ((rc = sata_scr_read(link, SCR_STATUS, &cur))) | |
3244 | return rc; | |
3245 | cur &= 0xf; | |
3246 | ||
3247 | last = cur; | |
3248 | last_jiffies = jiffies; | |
3249 | ||
3250 | while (1) { | |
3251 | msleep(interval_msec); | |
3252 | if ((rc = sata_scr_read(link, SCR_STATUS, &cur))) | |
3253 | return rc; | |
3254 | cur &= 0xf; | |
3255 | ||
3256 | /* DET stable? */ | |
3257 | if (cur == last) { | |
3258 | if (cur == 1 && time_before(jiffies, deadline)) | |
3259 | continue; | |
3260 | if (time_after(jiffies, last_jiffies + duration)) | |
3261 | return 0; | |
3262 | continue; | |
3263 | } | |
3264 | ||
3265 | /* unstable, start over */ | |
3266 | last = cur; | |
3267 | last_jiffies = jiffies; | |
3268 | ||
3269 | /* Check deadline. If debouncing failed, return | |
3270 | * -EPIPE to tell upper layer to lower link speed. | |
3271 | */ | |
3272 | if (time_after(jiffies, deadline)) | |
3273 | return -EPIPE; | |
3274 | } | |
3275 | } | |
3276 | ||
3277 | /** | |
3278 | * sata_link_resume - resume SATA link | |
3279 | * @link: ATA link to resume SATA | |
3280 | * @params: timing parameters { interval, duratinon, timeout } in msec | |
3281 | * @deadline: deadline jiffies for the operation | |
3282 | * | |
3283 | * Resume SATA phy @link and debounce it. | |
3284 | * | |
3285 | * LOCKING: | |
3286 | * Kernel thread context (may sleep) | |
3287 | * | |
3288 | * RETURNS: | |
3289 | * 0 on success, -errno on failure. | |
3290 | */ | |
3291 | int sata_link_resume(struct ata_link *link, const unsigned long *params, | |
3292 | unsigned long deadline) | |
3293 | { | |
3294 | u32 scontrol; | |
3295 | int rc; | |
3296 | ||
3297 | if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol))) | |
3298 | return rc; | |
3299 | ||
3300 | scontrol = (scontrol & 0x0f0) | 0x300; | |
3301 | ||
3302 | if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol))) | |
3303 | return rc; | |
3304 | ||
3305 | /* Some PHYs react badly if SStatus is pounded immediately | |
3306 | * after resuming. Delay 200ms before debouncing. | |
3307 | */ | |
3308 | msleep(200); | |
3309 | ||
3310 | return sata_link_debounce(link, params, deadline); | |
3311 | } | |
3312 | ||
3313 | /** | |
3314 | * ata_std_prereset - prepare for reset | |
3315 | * @link: ATA link to be reset | |
3316 | * @deadline: deadline jiffies for the operation | |
3317 | * | |
3318 | * @link is about to be reset. Initialize it. Failure from | |
3319 | * prereset makes libata abort whole reset sequence and give up | |
3320 | * that port, so prereset should be best-effort. It does its | |
3321 | * best to prepare for reset sequence but if things go wrong, it | |
3322 | * should just whine, not fail. | |
3323 | * | |
3324 | * LOCKING: | |
3325 | * Kernel thread context (may sleep) | |
3326 | * | |
3327 | * RETURNS: | |
3328 | * 0 on success, -errno otherwise. | |
3329 | */ | |
3330 | int ata_std_prereset(struct ata_link *link, unsigned long deadline) | |
3331 | { | |
3332 | struct ata_port *ap = link->ap; | |
3333 | struct ata_eh_context *ehc = &link->eh_context; | |
3334 | const unsigned long *timing = sata_ehc_deb_timing(ehc); | |
3335 | int rc; | |
3336 | ||
3337 | /* handle link resume */ | |
3338 | if ((ehc->i.flags & ATA_EHI_RESUME_LINK) && | |
3339 | (link->flags & ATA_LFLAG_HRST_TO_RESUME)) | |
3340 | ehc->i.action |= ATA_EH_HARDRESET; | |
3341 | ||
3342 | /* if we're about to do hardreset, nothing more to do */ | |
3343 | if (ehc->i.action & ATA_EH_HARDRESET) | |
3344 | return 0; | |
3345 | ||
3346 | /* if SATA, resume link */ | |
3347 | if (ap->flags & ATA_FLAG_SATA) { | |
3348 | rc = sata_link_resume(link, timing, deadline); | |
3349 | /* whine about phy resume failure but proceed */ | |
3350 | if (rc && rc != -EOPNOTSUPP) | |
3351 | ata_link_printk(link, KERN_WARNING, "failed to resume " | |
3352 | "link for reset (errno=%d)\n", rc); | |
3353 | } | |
3354 | ||
3355 | /* Wait for !BSY if the controller can wait for the first D2H | |
3356 | * Reg FIS and we don't know that no device is attached. | |
3357 | */ | |
3358 | if (!(link->flags & ATA_LFLAG_SKIP_D2H_BSY) && !ata_link_offline(link)) { | |
3359 | rc = ata_wait_ready(ap, deadline); | |
3360 | if (rc && rc != -ENODEV) { | |
3361 | ata_link_printk(link, KERN_WARNING, "device not ready " | |
3362 | "(errno=%d), forcing hardreset\n", rc); | |
3363 | ehc->i.action |= ATA_EH_HARDRESET; | |
3364 | } | |
3365 | } | |
3366 | ||
3367 | return 0; | |
3368 | } | |
3369 | ||
3370 | /** | |
3371 | * ata_std_softreset - reset host port via ATA SRST | |
3372 | * @link: ATA link to reset | |
3373 | * @classes: resulting classes of attached devices | |
3374 | * @deadline: deadline jiffies for the operation | |
3375 | * | |
3376 | * Reset host port using ATA SRST. | |
3377 | * | |
3378 | * LOCKING: | |
3379 | * Kernel thread context (may sleep) | |
3380 | * | |
3381 | * RETURNS: | |
3382 | * 0 on success, -errno otherwise. | |
3383 | */ | |
3384 | int ata_std_softreset(struct ata_link *link, unsigned int *classes, | |
3385 | unsigned long deadline) | |
3386 | { | |
3387 | struct ata_port *ap = link->ap; | |
3388 | unsigned int slave_possible = ap->flags & ATA_FLAG_SLAVE_POSS; | |
3389 | unsigned int devmask = 0; | |
3390 | int rc; | |
3391 | u8 err; | |
3392 | ||
3393 | DPRINTK("ENTER\n"); | |
3394 | ||
3395 | if (ata_link_offline(link)) { | |
3396 | classes[0] = ATA_DEV_NONE; | |
3397 | goto out; | |
3398 | } | |
3399 | ||
3400 | /* determine if device 0/1 are present */ | |
3401 | if (ata_devchk(ap, 0)) | |
3402 | devmask |= (1 << 0); | |
3403 | if (slave_possible && ata_devchk(ap, 1)) | |
3404 | devmask |= (1 << 1); | |
3405 | ||
3406 | /* select device 0 again */ | |
3407 | ap->ops->dev_select(ap, 0); | |
3408 | ||
3409 | /* issue bus reset */ | |
3410 | DPRINTK("about to softreset, devmask=%x\n", devmask); | |
3411 | rc = ata_bus_softreset(ap, devmask, deadline); | |
3412 | /* if link is occupied, -ENODEV too is an error */ | |
3413 | if (rc && (rc != -ENODEV || sata_scr_valid(link))) { | |
3414 | ata_link_printk(link, KERN_ERR, "SRST failed (errno=%d)\n", rc); | |
3415 | return rc; | |
3416 | } | |
3417 | ||
3418 | /* determine by signature whether we have ATA or ATAPI devices */ | |
3419 | classes[0] = ata_dev_try_classify(ap, 0, &err); | |
3420 | if (slave_possible && err != 0x81) | |
3421 | classes[1] = ata_dev_try_classify(ap, 1, &err); | |
3422 | ||
3423 | out: | |
3424 | DPRINTK("EXIT, classes[0]=%u [1]=%u\n", classes[0], classes[1]); | |
3425 | return 0; | |
3426 | } | |
3427 | ||
3428 | /** | |
3429 | * sata_link_hardreset - reset link via SATA phy reset | |
3430 | * @link: link to reset | |
3431 | * @timing: timing parameters { interval, duratinon, timeout } in msec | |
3432 | * @deadline: deadline jiffies for the operation | |
3433 | * | |
3434 | * SATA phy-reset @link using DET bits of SControl register. | |
3435 | * | |
3436 | * LOCKING: | |
3437 | * Kernel thread context (may sleep) | |
3438 | * | |
3439 | * RETURNS: | |
3440 | * 0 on success, -errno otherwise. | |
3441 | */ | |
3442 | int sata_link_hardreset(struct ata_link *link, const unsigned long *timing, | |
3443 | unsigned long deadline) | |
3444 | { | |
3445 | u32 scontrol; | |
3446 | int rc; | |
3447 | ||
3448 | DPRINTK("ENTER\n"); | |
3449 | ||
3450 | if (sata_set_spd_needed(link)) { | |
3451 | /* SATA spec says nothing about how to reconfigure | |
3452 | * spd. To be on the safe side, turn off phy during | |
3453 | * reconfiguration. This works for at least ICH7 AHCI | |
3454 | * and Sil3124. | |
3455 | */ | |
3456 | if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol))) | |
3457 | goto out; | |
3458 | ||
3459 | scontrol = (scontrol & 0x0f0) | 0x304; | |
3460 | ||
3461 | if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol))) | |
3462 | goto out; | |
3463 | ||
3464 | sata_set_spd(link); | |
3465 | } | |
3466 | ||
3467 | /* issue phy wake/reset */ | |
3468 | if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol))) | |
3469 | goto out; | |
3470 | ||
3471 | scontrol = (scontrol & 0x0f0) | 0x301; | |
3472 | ||
3473 | if ((rc = sata_scr_write_flush(link, SCR_CONTROL, scontrol))) | |
3474 | goto out; | |
3475 | ||
3476 | /* Couldn't find anything in SATA I/II specs, but AHCI-1.1 | |
3477 | * 10.4.2 says at least 1 ms. | |
3478 | */ | |
3479 | msleep(1); | |
3480 | ||
3481 | /* bring link back */ | |
3482 | rc = sata_link_resume(link, timing, deadline); | |
3483 | out: | |
3484 | DPRINTK("EXIT, rc=%d\n", rc); | |
3485 | return rc; | |
3486 | } | |
3487 | ||
3488 | /** | |
3489 | * sata_std_hardreset - reset host port via SATA phy reset | |
3490 | * @link: link to reset | |
3491 | * @class: resulting class of attached device | |
3492 | * @deadline: deadline jiffies for the operation | |
3493 | * | |
3494 | * SATA phy-reset host port using DET bits of SControl register, | |
3495 | * wait for !BSY and classify the attached device. | |
3496 | * | |
3497 | * LOCKING: | |
3498 | * Kernel thread context (may sleep) | |
3499 | * | |
3500 | * RETURNS: | |
3501 | * 0 on success, -errno otherwise. | |
3502 | */ | |
3503 | int sata_std_hardreset(struct ata_link *link, unsigned int *class, | |
3504 | unsigned long deadline) | |
3505 | { | |
3506 | struct ata_port *ap = link->ap; | |
3507 | const unsigned long *timing = sata_ehc_deb_timing(&link->eh_context); | |
3508 | int rc; | |
3509 | ||
3510 | DPRINTK("ENTER\n"); | |
3511 | ||
3512 | /* do hardreset */ | |
3513 | rc = sata_link_hardreset(link, timing, deadline); | |
3514 | if (rc) { | |
3515 | ata_link_printk(link, KERN_ERR, | |
3516 | "COMRESET failed (errno=%d)\n", rc); | |
3517 | return rc; | |
3518 | } | |
3519 | ||
3520 | /* TODO: phy layer with polling, timeouts, etc. */ | |
3521 | if (ata_link_offline(link)) { | |
3522 | *class = ATA_DEV_NONE; | |
3523 | DPRINTK("EXIT, link offline\n"); | |
3524 | return 0; | |
3525 | } | |
3526 | ||
3527 | /* wait a while before checking status, see SRST for more info */ | |
3528 | msleep(150); | |
3529 | ||
3530 | rc = ata_wait_ready(ap, deadline); | |
3531 | /* link occupied, -ENODEV too is an error */ | |
3532 | if (rc) { | |
3533 | ata_link_printk(link, KERN_ERR, | |
3534 | "COMRESET failed (errno=%d)\n", rc); | |
3535 | return rc; | |
3536 | } | |
3537 | ||
3538 | ap->ops->dev_select(ap, 0); /* probably unnecessary */ | |
3539 | ||
3540 | *class = ata_dev_try_classify(ap, 0, NULL); | |
3541 | ||
3542 | DPRINTK("EXIT, class=%u\n", *class); | |
3543 | return 0; | |
3544 | } | |
3545 | ||
3546 | /** | |
3547 | * ata_std_postreset - standard postreset callback | |
3548 | * @link: the target ata_link | |
3549 | * @classes: classes of attached devices | |
3550 | * | |
3551 | * This function is invoked after a successful reset. Note that | |
3552 | * the device might have been reset more than once using | |
3553 | * different reset methods before postreset is invoked. | |
3554 | * | |
3555 | * LOCKING: | |
3556 | * Kernel thread context (may sleep) | |
3557 | */ | |
3558 | void ata_std_postreset(struct ata_link *link, unsigned int *classes) | |
3559 | { | |
3560 | struct ata_port *ap = link->ap; | |
3561 | u32 serror; | |
3562 | ||
3563 | DPRINTK("ENTER\n"); | |
3564 | ||
3565 | /* print link status */ | |
3566 | sata_print_link_status(link); | |
3567 | ||
3568 | /* clear SError */ | |
3569 | if (sata_scr_read(link, SCR_ERROR, &serror) == 0) | |
3570 | sata_scr_write(link, SCR_ERROR, serror); | |
3571 | ||
3572 | /* is double-select really necessary? */ | |
3573 | if (classes[0] != ATA_DEV_NONE) | |
3574 | ap->ops->dev_select(ap, 1); | |
3575 | if (classes[1] != ATA_DEV_NONE) | |
3576 | ap->ops->dev_select(ap, 0); | |
3577 | ||
3578 | /* bail out if no device is present */ | |
3579 | if (classes[0] == ATA_DEV_NONE && classes[1] == ATA_DEV_NONE) { | |
3580 | DPRINTK("EXIT, no device\n"); | |
3581 | return; | |
3582 | } | |
3583 | ||
3584 | /* set up device control */ | |
3585 | if (ap->ioaddr.ctl_addr) | |
3586 | iowrite8(ap->ctl, ap->ioaddr.ctl_addr); | |
3587 | ||
3588 | DPRINTK("EXIT\n"); | |
3589 | } | |
3590 | ||
3591 | /** | |
3592 | * ata_dev_same_device - Determine whether new ID matches configured device | |
3593 | * @dev: device to compare against | |
3594 | * @new_class: class of the new device | |
3595 | * @new_id: IDENTIFY page of the new device | |
3596 | * | |
3597 | * Compare @new_class and @new_id against @dev and determine | |
3598 | * whether @dev is the device indicated by @new_class and | |
3599 | * @new_id. | |
3600 | * | |
3601 | * LOCKING: | |
3602 | * None. | |
3603 | * | |
3604 | * RETURNS: | |
3605 | * 1 if @dev matches @new_class and @new_id, 0 otherwise. | |
3606 | */ | |
3607 | static int ata_dev_same_device(struct ata_device *dev, unsigned int new_class, | |
3608 | const u16 *new_id) | |
3609 | { | |
3610 | const u16 *old_id = dev->id; | |
3611 | unsigned char model[2][ATA_ID_PROD_LEN + 1]; | |
3612 | unsigned char serial[2][ATA_ID_SERNO_LEN + 1]; | |
3613 | ||
3614 | if (dev->class != new_class) { | |
3615 | ata_dev_printk(dev, KERN_INFO, "class mismatch %d != %d\n", | |
3616 | dev->class, new_class); | |
3617 | return 0; | |
3618 | } | |
3619 | ||
3620 | ata_id_c_string(old_id, model[0], ATA_ID_PROD, sizeof(model[0])); | |
3621 | ata_id_c_string(new_id, model[1], ATA_ID_PROD, sizeof(model[1])); | |
3622 | ata_id_c_string(old_id, serial[0], ATA_ID_SERNO, sizeof(serial[0])); | |
3623 | ata_id_c_string(new_id, serial[1], ATA_ID_SERNO, sizeof(serial[1])); | |
3624 | ||
3625 | if (strcmp(model[0], model[1])) { | |
3626 | ata_dev_printk(dev, KERN_INFO, "model number mismatch " | |
3627 | "'%s' != '%s'\n", model[0], model[1]); | |
3628 | return 0; | |
3629 | } | |
3630 | ||
3631 | if (strcmp(serial[0], serial[1])) { | |
3632 | ata_dev_printk(dev, KERN_INFO, "serial number mismatch " | |
3633 | "'%s' != '%s'\n", serial[0], serial[1]); | |
3634 | return 0; | |
3635 | } | |
3636 | ||
3637 | return 1; | |
3638 | } | |
3639 | ||
3640 | /** | |
3641 | * ata_dev_reread_id - Re-read IDENTIFY data | |
3642 | * @dev: target ATA device | |
3643 | * @readid_flags: read ID flags | |
3644 | * | |
3645 | * Re-read IDENTIFY page and make sure @dev is still attached to | |
3646 | * the port. | |
3647 | * | |
3648 | * LOCKING: | |
3649 | * Kernel thread context (may sleep) | |
3650 | * | |
3651 | * RETURNS: | |
3652 | * 0 on success, negative errno otherwise | |
3653 | */ | |
3654 | int ata_dev_reread_id(struct ata_device *dev, unsigned int readid_flags) | |
3655 | { | |
3656 | unsigned int class = dev->class; | |
3657 | u16 *id = (void *)dev->link->ap->sector_buf; | |
3658 | int rc; | |
3659 | ||
3660 | /* read ID data */ | |
3661 | rc = ata_dev_read_id(dev, &class, readid_flags, id); | |
3662 | if (rc) | |
3663 | return rc; | |
3664 | ||
3665 | /* is the device still there? */ | |
3666 | if (!ata_dev_same_device(dev, class, id)) | |
3667 | return -ENODEV; | |
3668 | ||
3669 | memcpy(dev->id, id, sizeof(id[0]) * ATA_ID_WORDS); | |
3670 | return 0; | |
3671 | } | |
3672 | ||
3673 | /** | |
3674 | * ata_dev_revalidate - Revalidate ATA device | |
3675 | * @dev: device to revalidate | |
3676 | * @readid_flags: read ID flags | |
3677 | * | |
3678 | * Re-read IDENTIFY page, make sure @dev is still attached to the | |
3679 | * port and reconfigure it according to the new IDENTIFY page. | |
3680 | * | |
3681 | * LOCKING: | |
3682 | * Kernel thread context (may sleep) | |
3683 | * | |
3684 | * RETURNS: | |
3685 | * 0 on success, negative errno otherwise | |
3686 | */ | |
3687 | int ata_dev_revalidate(struct ata_device *dev, unsigned int readid_flags) | |
3688 | { | |
3689 | u64 n_sectors = dev->n_sectors; | |
3690 | int rc; | |
3691 | ||
3692 | if (!ata_dev_enabled(dev)) | |
3693 | return -ENODEV; | |
3694 | ||
3695 | /* re-read ID */ | |
3696 | rc = ata_dev_reread_id(dev, readid_flags); | |
3697 | if (rc) | |
3698 | goto fail; | |
3699 | ||
3700 | /* configure device according to the new ID */ | |
3701 | rc = ata_dev_configure(dev); | |
3702 | if (rc) | |
3703 | goto fail; | |
3704 | ||
3705 | /* verify n_sectors hasn't changed */ | |
3706 | if (dev->class == ATA_DEV_ATA && n_sectors && | |
3707 | dev->n_sectors != n_sectors) { | |
3708 | ata_dev_printk(dev, KERN_INFO, "n_sectors mismatch " | |
3709 | "%llu != %llu\n", | |
3710 | (unsigned long long)n_sectors, | |
3711 | (unsigned long long)dev->n_sectors); | |
3712 | ||
3713 | /* restore original n_sectors */ | |
3714 | dev->n_sectors = n_sectors; | |
3715 | ||
3716 | rc = -ENODEV; | |
3717 | goto fail; | |
3718 | } | |
3719 | ||
3720 | return 0; | |
3721 | ||
3722 | fail: | |
3723 | ata_dev_printk(dev, KERN_ERR, "revalidation failed (errno=%d)\n", rc); | |
3724 | return rc; | |
3725 | } | |
3726 | ||
3727 | struct ata_blacklist_entry { | |
3728 | const char *model_num; | |
3729 | const char *model_rev; | |
3730 | unsigned long horkage; | |
3731 | }; | |
3732 | ||
3733 | static const struct ata_blacklist_entry ata_device_blacklist [] = { | |
3734 | /* Devices with DMA related problems under Linux */ | |
3735 | { "WDC AC11000H", NULL, ATA_HORKAGE_NODMA }, | |
3736 | { "WDC AC22100H", NULL, ATA_HORKAGE_NODMA }, | |
3737 | { "WDC AC32500H", NULL, ATA_HORKAGE_NODMA }, | |
3738 | { "WDC AC33100H", NULL, ATA_HORKAGE_NODMA }, | |
3739 | { "WDC AC31600H", NULL, ATA_HORKAGE_NODMA }, | |
3740 | { "WDC AC32100H", "24.09P07", ATA_HORKAGE_NODMA }, | |
3741 | { "WDC AC23200L", "21.10N21", ATA_HORKAGE_NODMA }, | |
3742 | { "Compaq CRD-8241B", NULL, ATA_HORKAGE_NODMA }, | |
3743 | { "CRD-8400B", NULL, ATA_HORKAGE_NODMA }, | |
3744 | { "CRD-8480B", NULL, ATA_HORKAGE_NODMA }, | |
3745 | { "CRD-8482B", NULL, ATA_HORKAGE_NODMA }, | |
3746 | { "CRD-84", NULL, ATA_HORKAGE_NODMA }, | |
3747 | { "SanDisk SDP3B", NULL, ATA_HORKAGE_NODMA }, | |
3748 | { "SanDisk SDP3B-64", NULL, ATA_HORKAGE_NODMA }, | |
3749 | { "SANYO CD-ROM CRD", NULL, ATA_HORKAGE_NODMA }, | |
3750 | { "HITACHI CDR-8", NULL, ATA_HORKAGE_NODMA }, | |
3751 | { "HITACHI CDR-8335", NULL, ATA_HORKAGE_NODMA }, | |
3752 | { "HITACHI CDR-8435", NULL, ATA_HORKAGE_NODMA }, | |
3753 | { "Toshiba CD-ROM XM-6202B", NULL, ATA_HORKAGE_NODMA }, | |
3754 | { "TOSHIBA CD-ROM XM-1702BC", NULL, ATA_HORKAGE_NODMA }, | |
3755 | { "CD-532E-A", NULL, ATA_HORKAGE_NODMA }, | |
3756 | { "E-IDE CD-ROM CR-840",NULL, ATA_HORKAGE_NODMA }, | |
3757 | { "CD-ROM Drive/F5A", NULL, ATA_HORKAGE_NODMA }, | |
3758 | { "WPI CDD-820", NULL, ATA_HORKAGE_NODMA }, | |
3759 | { "SAMSUNG CD-ROM SC-148C", NULL, ATA_HORKAGE_NODMA }, | |
3760 | { "SAMSUNG CD-ROM SC", NULL, ATA_HORKAGE_NODMA }, | |
3761 | { "ATAPI CD-ROM DRIVE 40X MAXIMUM",NULL,ATA_HORKAGE_NODMA }, | |
3762 | { "_NEC DV5800A", NULL, ATA_HORKAGE_NODMA }, | |
3763 | { "SAMSUNG CD-ROM SN-124","N001", ATA_HORKAGE_NODMA }, | |
3764 | { "Seagate STT20000A", NULL, ATA_HORKAGE_NODMA }, | |
3765 | { "IOMEGA ZIP 250 ATAPI", NULL, ATA_HORKAGE_NODMA }, /* temporary fix */ | |
3766 | { "IOMEGA ZIP 250 ATAPI Floppy", | |
3767 | NULL, ATA_HORKAGE_NODMA }, | |
3768 | ||
3769 | /* Weird ATAPI devices */ | |
3770 | { "TORiSAN DVD-ROM DRD-N216", NULL, ATA_HORKAGE_MAX_SEC_128 }, | |
3771 | ||
3772 | /* Devices we expect to fail diagnostics */ | |
3773 | ||
3774 | /* Devices where NCQ should be avoided */ | |
3775 | /* NCQ is slow */ | |
3776 | { "WDC WD740ADFD-00", NULL, ATA_HORKAGE_NONCQ }, | |
3777 | /* http://thread.gmane.org/gmane.linux.ide/14907 */ | |
3778 | { "FUJITSU MHT2060BH", NULL, ATA_HORKAGE_NONCQ }, | |
3779 | /* NCQ is broken */ | |
3780 | { "Maxtor 6L250S0", "BANC1G10", ATA_HORKAGE_NONCQ }, | |
3781 | { "Maxtor 6B200M0", "BANC1BM0", ATA_HORKAGE_NONCQ }, | |
3782 | { "Maxtor 6B200M0", "BANC1B10", ATA_HORKAGE_NONCQ }, | |
3783 | { "Maxtor 7B250S0", "BANC1B70", ATA_HORKAGE_NONCQ, }, | |
3784 | { "Maxtor 7B300S0", "BANC1B70", ATA_HORKAGE_NONCQ }, | |
3785 | { "Maxtor 7V300F0", "VA111630", ATA_HORKAGE_NONCQ }, | |
3786 | { "HITACHI HDS7250SASUN500G 0621KTAWSD", "K2AOAJ0AHITACHI", | |
3787 | ATA_HORKAGE_NONCQ }, | |
3788 | /* NCQ hard hangs device under heavier load, needs hard power cycle */ | |
3789 | { "Maxtor 6B250S0", "BANC1B70", ATA_HORKAGE_NONCQ }, | |
3790 | /* Blacklist entries taken from Silicon Image 3124/3132 | |
3791 | Windows driver .inf file - also several Linux problem reports */ | |
3792 | { "HTS541060G9SA00", "MB3OC60D", ATA_HORKAGE_NONCQ, }, | |
3793 | { "HTS541080G9SA00", "MB4OC60D", ATA_HORKAGE_NONCQ, }, | |
3794 | { "HTS541010G9SA00", "MBZOC60D", ATA_HORKAGE_NONCQ, }, | |
3795 | /* Drives which do spurious command completion */ | |
3796 | { "HTS541680J9SA00", "SB2IC7EP", ATA_HORKAGE_NONCQ, }, | |
3797 | { "HTS541612J9SA00", "SBDIC7JP", ATA_HORKAGE_NONCQ, }, | |
3798 | { "Hitachi HTS541616J9SA00", "SB4OC70P", ATA_HORKAGE_NONCQ, }, | |
3799 | { "WDC WD740ADFD-00NLR1", NULL, ATA_HORKAGE_NONCQ, }, | |
3800 | { "FUJITSU MHV2080BH", "00840028", ATA_HORKAGE_NONCQ, }, | |
3801 | { "ST9160821AS", "3.CLF", ATA_HORKAGE_NONCQ, }, | |
3802 | { "ST3160812AS", "3.AD", ATA_HORKAGE_NONCQ, }, | |
3803 | { "SAMSUNG HD401LJ", "ZZ100-15", ATA_HORKAGE_NONCQ, }, | |
3804 | ||
3805 | /* devices which puke on READ_NATIVE_MAX */ | |
3806 | { "HDS724040KLSA80", "KFAOA20N", ATA_HORKAGE_BROKEN_HPA, }, | |
3807 | { "WDC WD3200JD-00KLB0", "WD-WCAMR1130137", ATA_HORKAGE_BROKEN_HPA }, | |
3808 | { "WDC WD2500JD-00HBB0", "WD-WMAL71490727", ATA_HORKAGE_BROKEN_HPA }, | |
3809 | { "MAXTOR 6L080L4", "A93.0500", ATA_HORKAGE_BROKEN_HPA }, | |
3810 | ||
3811 | /* End Marker */ | |
3812 | { } | |
3813 | }; | |
3814 | ||
3815 | static unsigned long ata_dev_blacklisted(const struct ata_device *dev) | |
3816 | { | |
3817 | unsigned char model_num[ATA_ID_PROD_LEN + 1]; | |
3818 | unsigned char model_rev[ATA_ID_FW_REV_LEN + 1]; | |
3819 | const struct ata_blacklist_entry *ad = ata_device_blacklist; | |
3820 | ||
3821 | ata_id_c_string(dev->id, model_num, ATA_ID_PROD, sizeof(model_num)); | |
3822 | ata_id_c_string(dev->id, model_rev, ATA_ID_FW_REV, sizeof(model_rev)); | |
3823 | ||
3824 | while (ad->model_num) { | |
3825 | if (!strcmp(ad->model_num, model_num)) { | |
3826 | if (ad->model_rev == NULL) | |
3827 | return ad->horkage; | |
3828 | if (!strcmp(ad->model_rev, model_rev)) | |
3829 | return ad->horkage; | |
3830 | } | |
3831 | ad++; | |
3832 | } | |
3833 | return 0; | |
3834 | } | |
3835 | ||
3836 | static int ata_dma_blacklisted(const struct ata_device *dev) | |
3837 | { | |
3838 | /* We don't support polling DMA. | |
3839 | * DMA blacklist those ATAPI devices with CDB-intr (and use PIO) | |
3840 | * if the LLDD handles only interrupts in the HSM_ST_LAST state. | |
3841 | */ | |
3842 | if ((dev->link->ap->flags & ATA_FLAG_PIO_POLLING) && | |
3843 | (dev->flags & ATA_DFLAG_CDB_INTR)) | |
3844 | return 1; | |
3845 | return (dev->horkage & ATA_HORKAGE_NODMA) ? 1 : 0; | |
3846 | } | |
3847 | ||
3848 | /** | |
3849 | * ata_dev_xfermask - Compute supported xfermask of the given device | |
3850 | * @dev: Device to compute xfermask for | |
3851 | * | |
3852 | * Compute supported xfermask of @dev and store it in | |
3853 | * dev->*_mask. This function is responsible for applying all | |
3854 | * known limits including host controller limits, device | |
3855 | * blacklist, etc... | |
3856 | * | |
3857 | * LOCKING: | |
3858 | * None. | |
3859 | */ | |
3860 | static void ata_dev_xfermask(struct ata_device *dev) | |
3861 | { | |
3862 | struct ata_link *link = dev->link; | |
3863 | struct ata_port *ap = link->ap; | |
3864 | struct ata_host *host = ap->host; | |
3865 | unsigned long xfer_mask; | |
3866 | ||
3867 | /* controller modes available */ | |
3868 | xfer_mask = ata_pack_xfermask(ap->pio_mask, | |
3869 | ap->mwdma_mask, ap->udma_mask); | |
3870 | ||
3871 | /* drive modes available */ | |
3872 | xfer_mask &= ata_pack_xfermask(dev->pio_mask, | |
3873 | dev->mwdma_mask, dev->udma_mask); | |
3874 | xfer_mask &= ata_id_xfermask(dev->id); | |
3875 | ||
3876 | /* | |
3877 | * CFA Advanced TrueIDE timings are not allowed on a shared | |
3878 | * cable | |
3879 | */ | |
3880 | if (ata_dev_pair(dev)) { | |
3881 | /* No PIO5 or PIO6 */ | |
3882 | xfer_mask &= ~(0x03 << (ATA_SHIFT_PIO + 5)); | |
3883 | /* No MWDMA3 or MWDMA 4 */ | |
3884 | xfer_mask &= ~(0x03 << (ATA_SHIFT_MWDMA + 3)); | |
3885 | } | |
3886 | ||
3887 | if (ata_dma_blacklisted(dev)) { | |
3888 | xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA); | |
3889 | ata_dev_printk(dev, KERN_WARNING, | |
3890 | "device is on DMA blacklist, disabling DMA\n"); | |
3891 | } | |
3892 | ||
3893 | if ((host->flags & ATA_HOST_SIMPLEX) && | |
3894 | host->simplex_claimed && host->simplex_claimed != ap) { | |
3895 | xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA); | |
3896 | ata_dev_printk(dev, KERN_WARNING, "simplex DMA is claimed by " | |
3897 | "other device, disabling DMA\n"); | |
3898 | } | |
3899 | ||
3900 | if (ap->flags & ATA_FLAG_NO_IORDY) | |
3901 | xfer_mask &= ata_pio_mask_no_iordy(dev); | |
3902 | ||
3903 | if (ap->ops->mode_filter) | |
3904 | xfer_mask = ap->ops->mode_filter(dev, xfer_mask); | |
3905 | ||
3906 | /* Apply cable rule here. Don't apply it early because when | |
3907 | * we handle hot plug the cable type can itself change. | |
3908 | * Check this last so that we know if the transfer rate was | |
3909 | * solely limited by the cable. | |
3910 | * Unknown or 80 wire cables reported host side are checked | |
3911 | * drive side as well. Cases where we know a 40wire cable | |
3912 | * is used safely for 80 are not checked here. | |
3913 | */ | |
3914 | if (xfer_mask & (0xF8 << ATA_SHIFT_UDMA)) | |
3915 | /* UDMA/44 or higher would be available */ | |
3916 | if((ap->cbl == ATA_CBL_PATA40) || | |
3917 | (ata_drive_40wire(dev->id) && | |
3918 | (ap->cbl == ATA_CBL_PATA_UNK || | |
3919 | ap->cbl == ATA_CBL_PATA80))) { | |
3920 | ata_dev_printk(dev, KERN_WARNING, | |
3921 | "limited to UDMA/33 due to 40-wire cable\n"); | |
3922 | xfer_mask &= ~(0xF8 << ATA_SHIFT_UDMA); | |
3923 | } | |
3924 | ||
3925 | ata_unpack_xfermask(xfer_mask, &dev->pio_mask, | |
3926 | &dev->mwdma_mask, &dev->udma_mask); | |
3927 | } | |
3928 | ||
3929 | /** | |
3930 | * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command | |
3931 | * @dev: Device to which command will be sent | |
3932 | * | |
3933 | * Issue SET FEATURES - XFER MODE command to device @dev | |
3934 | * on port @ap. | |
3935 | * | |
3936 | * LOCKING: | |
3937 | * PCI/etc. bus probe sem. | |
3938 | * | |
3939 | * RETURNS: | |
3940 | * 0 on success, AC_ERR_* mask otherwise. | |
3941 | */ | |
3942 | ||
3943 | static unsigned int ata_dev_set_xfermode(struct ata_device *dev) | |
3944 | { | |
3945 | struct ata_taskfile tf; | |
3946 | unsigned int err_mask; | |
3947 | ||
3948 | /* set up set-features taskfile */ | |
3949 | DPRINTK("set features - xfer mode\n"); | |
3950 | ||
3951 | /* Some controllers and ATAPI devices show flaky interrupt | |
3952 | * behavior after setting xfer mode. Use polling instead. | |
3953 | */ | |
3954 | ata_tf_init(dev, &tf); | |
3955 | tf.command = ATA_CMD_SET_FEATURES; | |
3956 | tf.feature = SETFEATURES_XFER; | |
3957 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_POLLING; | |
3958 | tf.protocol = ATA_PROT_NODATA; | |
3959 | tf.nsect = dev->xfer_mode; | |
3960 | ||
3961 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0); | |
3962 | ||
3963 | DPRINTK("EXIT, err_mask=%x\n", err_mask); | |
3964 | return err_mask; | |
3965 | } | |
3966 | ||
3967 | /** | |
3968 | * ata_dev_init_params - Issue INIT DEV PARAMS command | |
3969 | * @dev: Device to which command will be sent | |
3970 | * @heads: Number of heads (taskfile parameter) | |
3971 | * @sectors: Number of sectors (taskfile parameter) | |
3972 | * | |
3973 | * LOCKING: | |
3974 | * Kernel thread context (may sleep) | |
3975 | * | |
3976 | * RETURNS: | |
3977 | * 0 on success, AC_ERR_* mask otherwise. | |
3978 | */ | |
3979 | static unsigned int ata_dev_init_params(struct ata_device *dev, | |
3980 | u16 heads, u16 sectors) | |
3981 | { | |
3982 | struct ata_taskfile tf; | |
3983 | unsigned int err_mask; | |
3984 | ||
3985 | /* Number of sectors per track 1-255. Number of heads 1-16 */ | |
3986 | if (sectors < 1 || sectors > 255 || heads < 1 || heads > 16) | |
3987 | return AC_ERR_INVALID; | |
3988 | ||
3989 | /* set up init dev params taskfile */ | |
3990 | DPRINTK("init dev params \n"); | |
3991 | ||
3992 | ata_tf_init(dev, &tf); | |
3993 | tf.command = ATA_CMD_INIT_DEV_PARAMS; | |
3994 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
3995 | tf.protocol = ATA_PROT_NODATA; | |
3996 | tf.nsect = sectors; | |
3997 | tf.device |= (heads - 1) & 0x0f; /* max head = num. of heads - 1 */ | |
3998 | ||
3999 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0); | |
4000 | /* A clean abort indicates an original or just out of spec drive | |
4001 | and we should continue as we issue the setup based on the | |
4002 | drive reported working geometry */ | |
4003 | if (err_mask == AC_ERR_DEV && (tf.feature & ATA_ABORTED)) | |
4004 | err_mask = 0; | |
4005 | ||
4006 | DPRINTK("EXIT, err_mask=%x\n", err_mask); | |
4007 | return err_mask; | |
4008 | } | |
4009 | ||
4010 | /** | |
4011 | * ata_sg_clean - Unmap DMA memory associated with command | |
4012 | * @qc: Command containing DMA memory to be released | |
4013 | * | |
4014 | * Unmap all mapped DMA memory associated with this command. | |
4015 | * | |
4016 | * LOCKING: | |
4017 | * spin_lock_irqsave(host lock) | |
4018 | */ | |
4019 | void ata_sg_clean(struct ata_queued_cmd *qc) | |
4020 | { | |
4021 | struct ata_port *ap = qc->ap; | |
4022 | struct scatterlist *sg = qc->__sg; | |
4023 | int dir = qc->dma_dir; | |
4024 | void *pad_buf = NULL; | |
4025 | ||
4026 | WARN_ON(!(qc->flags & ATA_QCFLAG_DMAMAP)); | |
4027 | WARN_ON(sg == NULL); | |
4028 | ||
4029 | if (qc->flags & ATA_QCFLAG_SINGLE) | |
4030 | WARN_ON(qc->n_elem > 1); | |
4031 | ||
4032 | VPRINTK("unmapping %u sg elements\n", qc->n_elem); | |
4033 | ||
4034 | /* if we padded the buffer out to 32-bit bound, and data | |
4035 | * xfer direction is from-device, we must copy from the | |
4036 | * pad buffer back into the supplied buffer | |
4037 | */ | |
4038 | if (qc->pad_len && !(qc->tf.flags & ATA_TFLAG_WRITE)) | |
4039 | pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ); | |
4040 | ||
4041 | if (qc->flags & ATA_QCFLAG_SG) { | |
4042 | if (qc->n_elem) | |
4043 | dma_unmap_sg(ap->dev, sg, qc->n_elem, dir); | |
4044 | /* restore last sg */ | |
4045 | sg[qc->orig_n_elem - 1].length += qc->pad_len; | |
4046 | if (pad_buf) { | |
4047 | struct scatterlist *psg = &qc->pad_sgent; | |
4048 | void *addr = kmap_atomic(psg->page, KM_IRQ0); | |
4049 | memcpy(addr + psg->offset, pad_buf, qc->pad_len); | |
4050 | kunmap_atomic(addr, KM_IRQ0); | |
4051 | } | |
4052 | } else { | |
4053 | if (qc->n_elem) | |
4054 | dma_unmap_single(ap->dev, | |
4055 | sg_dma_address(&sg[0]), sg_dma_len(&sg[0]), | |
4056 | dir); | |
4057 | /* restore sg */ | |
4058 | sg->length += qc->pad_len; | |
4059 | if (pad_buf) | |
4060 | memcpy(qc->buf_virt + sg->length - qc->pad_len, | |
4061 | pad_buf, qc->pad_len); | |
4062 | } | |
4063 | ||
4064 | qc->flags &= ~ATA_QCFLAG_DMAMAP; | |
4065 | qc->__sg = NULL; | |
4066 | } | |
4067 | ||
4068 | /** | |
4069 | * ata_fill_sg - Fill PCI IDE PRD table | |
4070 | * @qc: Metadata associated with taskfile to be transferred | |
4071 | * | |
4072 | * Fill PCI IDE PRD (scatter-gather) table with segments | |
4073 | * associated with the current disk command. | |
4074 | * | |
4075 | * LOCKING: | |
4076 | * spin_lock_irqsave(host lock) | |
4077 | * | |
4078 | */ | |
4079 | static void ata_fill_sg(struct ata_queued_cmd *qc) | |
4080 | { | |
4081 | struct ata_port *ap = qc->ap; | |
4082 | struct scatterlist *sg; | |
4083 | unsigned int idx; | |
4084 | ||
4085 | WARN_ON(qc->__sg == NULL); | |
4086 | WARN_ON(qc->n_elem == 0 && qc->pad_len == 0); | |
4087 | ||
4088 | idx = 0; | |
4089 | ata_for_each_sg(sg, qc) { | |
4090 | u32 addr, offset; | |
4091 | u32 sg_len, len; | |
4092 | ||
4093 | /* determine if physical DMA addr spans 64K boundary. | |
4094 | * Note h/w doesn't support 64-bit, so we unconditionally | |
4095 | * truncate dma_addr_t to u32. | |
4096 | */ | |
4097 | addr = (u32) sg_dma_address(sg); | |
4098 | sg_len = sg_dma_len(sg); | |
4099 | ||
4100 | while (sg_len) { | |
4101 | offset = addr & 0xffff; | |
4102 | len = sg_len; | |
4103 | if ((offset + sg_len) > 0x10000) | |
4104 | len = 0x10000 - offset; | |
4105 | ||
4106 | ap->prd[idx].addr = cpu_to_le32(addr); | |
4107 | ap->prd[idx].flags_len = cpu_to_le32(len & 0xffff); | |
4108 | VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", idx, addr, len); | |
4109 | ||
4110 | idx++; | |
4111 | sg_len -= len; | |
4112 | addr += len; | |
4113 | } | |
4114 | } | |
4115 | ||
4116 | if (idx) | |
4117 | ap->prd[idx - 1].flags_len |= cpu_to_le32(ATA_PRD_EOT); | |
4118 | } | |
4119 | ||
4120 | /** | |
4121 | * ata_fill_sg_dumb - Fill PCI IDE PRD table | |
4122 | * @qc: Metadata associated with taskfile to be transferred | |
4123 | * | |
4124 | * Fill PCI IDE PRD (scatter-gather) table with segments | |
4125 | * associated with the current disk command. Perform the fill | |
4126 | * so that we avoid writing any length 64K records for | |
4127 | * controllers that don't follow the spec. | |
4128 | * | |
4129 | * LOCKING: | |
4130 | * spin_lock_irqsave(host lock) | |
4131 | * | |
4132 | */ | |
4133 | static void ata_fill_sg_dumb(struct ata_queued_cmd *qc) | |
4134 | { | |
4135 | struct ata_port *ap = qc->ap; | |
4136 | struct scatterlist *sg; | |
4137 | unsigned int idx; | |
4138 | ||
4139 | WARN_ON(qc->__sg == NULL); | |
4140 | WARN_ON(qc->n_elem == 0 && qc->pad_len == 0); | |
4141 | ||
4142 | idx = 0; | |
4143 | ata_for_each_sg(sg, qc) { | |
4144 | u32 addr, offset; | |
4145 | u32 sg_len, len, blen; | |
4146 | ||
4147 | /* determine if physical DMA addr spans 64K boundary. | |
4148 | * Note h/w doesn't support 64-bit, so we unconditionally | |
4149 | * truncate dma_addr_t to u32. | |
4150 | */ | |
4151 | addr = (u32) sg_dma_address(sg); | |
4152 | sg_len = sg_dma_len(sg); | |
4153 | ||
4154 | while (sg_len) { | |
4155 | offset = addr & 0xffff; | |
4156 | len = sg_len; | |
4157 | if ((offset + sg_len) > 0x10000) | |
4158 | len = 0x10000 - offset; | |
4159 | ||
4160 | blen = len & 0xffff; | |
4161 | ap->prd[idx].addr = cpu_to_le32(addr); | |
4162 | if (blen == 0) { | |
4163 | /* Some PATA chipsets like the CS5530 can't | |
4164 | cope with 0x0000 meaning 64K as the spec says */ | |
4165 | ap->prd[idx].flags_len = cpu_to_le32(0x8000); | |
4166 | blen = 0x8000; | |
4167 | ap->prd[++idx].addr = cpu_to_le32(addr + 0x8000); | |
4168 | } | |
4169 | ap->prd[idx].flags_len = cpu_to_le32(blen); | |
4170 | VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", idx, addr, len); | |
4171 | ||
4172 | idx++; | |
4173 | sg_len -= len; | |
4174 | addr += len; | |
4175 | } | |
4176 | } | |
4177 | ||
4178 | if (idx) | |
4179 | ap->prd[idx - 1].flags_len |= cpu_to_le32(ATA_PRD_EOT); | |
4180 | } | |
4181 | ||
4182 | /** | |
4183 | * ata_check_atapi_dma - Check whether ATAPI DMA can be supported | |
4184 | * @qc: Metadata associated with taskfile to check | |
4185 | * | |
4186 | * Allow low-level driver to filter ATA PACKET commands, returning | |
4187 | * a status indicating whether or not it is OK to use DMA for the | |
4188 | * supplied PACKET command. | |
4189 | * | |
4190 | * LOCKING: | |
4191 | * spin_lock_irqsave(host lock) | |
4192 | * | |
4193 | * RETURNS: 0 when ATAPI DMA can be used | |
4194 | * nonzero otherwise | |
4195 | */ | |
4196 | int ata_check_atapi_dma(struct ata_queued_cmd *qc) | |
4197 | { | |
4198 | struct ata_port *ap = qc->ap; | |
4199 | ||
4200 | /* Don't allow DMA if it isn't multiple of 16 bytes. Quite a | |
4201 | * few ATAPI devices choke on such DMA requests. | |
4202 | */ | |
4203 | if (unlikely(qc->nbytes & 15)) | |
4204 | return 1; | |
4205 | ||
4206 | if (ap->ops->check_atapi_dma) | |
4207 | return ap->ops->check_atapi_dma(qc); | |
4208 | ||
4209 | return 0; | |
4210 | } | |
4211 | ||
4212 | /** | |
4213 | * ata_qc_prep - Prepare taskfile for submission | |
4214 | * @qc: Metadata associated with taskfile to be prepared | |
4215 | * | |
4216 | * Prepare ATA taskfile for submission. | |
4217 | * | |
4218 | * LOCKING: | |
4219 | * spin_lock_irqsave(host lock) | |
4220 | */ | |
4221 | void ata_qc_prep(struct ata_queued_cmd *qc) | |
4222 | { | |
4223 | if (!(qc->flags & ATA_QCFLAG_DMAMAP)) | |
4224 | return; | |
4225 | ||
4226 | ata_fill_sg(qc); | |
4227 | } | |
4228 | ||
4229 | /** | |
4230 | * ata_dumb_qc_prep - Prepare taskfile for submission | |
4231 | * @qc: Metadata associated with taskfile to be prepared | |
4232 | * | |
4233 | * Prepare ATA taskfile for submission. | |
4234 | * | |
4235 | * LOCKING: | |
4236 | * spin_lock_irqsave(host lock) | |
4237 | */ | |
4238 | void ata_dumb_qc_prep(struct ata_queued_cmd *qc) | |
4239 | { | |
4240 | if (!(qc->flags & ATA_QCFLAG_DMAMAP)) | |
4241 | return; | |
4242 | ||
4243 | ata_fill_sg_dumb(qc); | |
4244 | } | |
4245 | ||
4246 | void ata_noop_qc_prep(struct ata_queued_cmd *qc) { } | |
4247 | ||
4248 | /** | |
4249 | * ata_sg_init_one - Associate command with memory buffer | |
4250 | * @qc: Command to be associated | |
4251 | * @buf: Memory buffer | |
4252 | * @buflen: Length of memory buffer, in bytes. | |
4253 | * | |
4254 | * Initialize the data-related elements of queued_cmd @qc | |
4255 | * to point to a single memory buffer, @buf of byte length @buflen. | |
4256 | * | |
4257 | * LOCKING: | |
4258 | * spin_lock_irqsave(host lock) | |
4259 | */ | |
4260 | ||
4261 | void ata_sg_init_one(struct ata_queued_cmd *qc, void *buf, unsigned int buflen) | |
4262 | { | |
4263 | qc->flags |= ATA_QCFLAG_SINGLE; | |
4264 | ||
4265 | qc->__sg = &qc->sgent; | |
4266 | qc->n_elem = 1; | |
4267 | qc->orig_n_elem = 1; | |
4268 | qc->buf_virt = buf; | |
4269 | qc->nbytes = buflen; | |
4270 | ||
4271 | sg_init_one(&qc->sgent, buf, buflen); | |
4272 | } | |
4273 | ||
4274 | /** | |
4275 | * ata_sg_init - Associate command with scatter-gather table. | |
4276 | * @qc: Command to be associated | |
4277 | * @sg: Scatter-gather table. | |
4278 | * @n_elem: Number of elements in s/g table. | |
4279 | * | |
4280 | * Initialize the data-related elements of queued_cmd @qc | |
4281 | * to point to a scatter-gather table @sg, containing @n_elem | |
4282 | * elements. | |
4283 | * | |
4284 | * LOCKING: | |
4285 | * spin_lock_irqsave(host lock) | |
4286 | */ | |
4287 | ||
4288 | void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg, | |
4289 | unsigned int n_elem) | |
4290 | { | |
4291 | qc->flags |= ATA_QCFLAG_SG; | |
4292 | qc->__sg = sg; | |
4293 | qc->n_elem = n_elem; | |
4294 | qc->orig_n_elem = n_elem; | |
4295 | } | |
4296 | ||
4297 | /** | |
4298 | * ata_sg_setup_one - DMA-map the memory buffer associated with a command. | |
4299 | * @qc: Command with memory buffer to be mapped. | |
4300 | * | |
4301 | * DMA-map the memory buffer associated with queued_cmd @qc. | |
4302 | * | |
4303 | * LOCKING: | |
4304 | * spin_lock_irqsave(host lock) | |
4305 | * | |
4306 | * RETURNS: | |
4307 | * Zero on success, negative on error. | |
4308 | */ | |
4309 | ||
4310 | static int ata_sg_setup_one(struct ata_queued_cmd *qc) | |
4311 | { | |
4312 | struct ata_port *ap = qc->ap; | |
4313 | int dir = qc->dma_dir; | |
4314 | struct scatterlist *sg = qc->__sg; | |
4315 | dma_addr_t dma_address; | |
4316 | int trim_sg = 0; | |
4317 | ||
4318 | /* we must lengthen transfers to end on a 32-bit boundary */ | |
4319 | qc->pad_len = sg->length & 3; | |
4320 | if (qc->pad_len) { | |
4321 | void *pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ); | |
4322 | struct scatterlist *psg = &qc->pad_sgent; | |
4323 | ||
4324 | WARN_ON(qc->dev->class != ATA_DEV_ATAPI); | |
4325 | ||
4326 | memset(pad_buf, 0, ATA_DMA_PAD_SZ); | |
4327 | ||
4328 | if (qc->tf.flags & ATA_TFLAG_WRITE) | |
4329 | memcpy(pad_buf, qc->buf_virt + sg->length - qc->pad_len, | |
4330 | qc->pad_len); | |
4331 | ||
4332 | sg_dma_address(psg) = ap->pad_dma + (qc->tag * ATA_DMA_PAD_SZ); | |
4333 | sg_dma_len(psg) = ATA_DMA_PAD_SZ; | |
4334 | /* trim sg */ | |
4335 | sg->length -= qc->pad_len; | |
4336 | if (sg->length == 0) | |
4337 | trim_sg = 1; | |
4338 | ||
4339 | DPRINTK("padding done, sg->length=%u pad_len=%u\n", | |
4340 | sg->length, qc->pad_len); | |
4341 | } | |
4342 | ||
4343 | if (trim_sg) { | |
4344 | qc->n_elem--; | |
4345 | goto skip_map; | |
4346 | } | |
4347 | ||
4348 | dma_address = dma_map_single(ap->dev, qc->buf_virt, | |
4349 | sg->length, dir); | |
4350 | if (dma_mapping_error(dma_address)) { | |
4351 | /* restore sg */ | |
4352 | sg->length += qc->pad_len; | |
4353 | return -1; | |
4354 | } | |
4355 | ||
4356 | sg_dma_address(sg) = dma_address; | |
4357 | sg_dma_len(sg) = sg->length; | |
4358 | ||
4359 | skip_map: | |
4360 | DPRINTK("mapped buffer of %d bytes for %s\n", sg_dma_len(sg), | |
4361 | qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read"); | |
4362 | ||
4363 | return 0; | |
4364 | } | |
4365 | ||
4366 | /** | |
4367 | * ata_sg_setup - DMA-map the scatter-gather table associated with a command. | |
4368 | * @qc: Command with scatter-gather table to be mapped. | |
4369 | * | |
4370 | * DMA-map the scatter-gather table associated with queued_cmd @qc. | |
4371 | * | |
4372 | * LOCKING: | |
4373 | * spin_lock_irqsave(host lock) | |
4374 | * | |
4375 | * RETURNS: | |
4376 | * Zero on success, negative on error. | |
4377 | * | |
4378 | */ | |
4379 | ||
4380 | static int ata_sg_setup(struct ata_queued_cmd *qc) | |
4381 | { | |
4382 | struct ata_port *ap = qc->ap; | |
4383 | struct scatterlist *sg = qc->__sg; | |
4384 | struct scatterlist *lsg = &sg[qc->n_elem - 1]; | |
4385 | int n_elem, pre_n_elem, dir, trim_sg = 0; | |
4386 | ||
4387 | VPRINTK("ENTER, ata%u\n", ap->print_id); | |
4388 | WARN_ON(!(qc->flags & ATA_QCFLAG_SG)); | |
4389 | ||
4390 | /* we must lengthen transfers to end on a 32-bit boundary */ | |
4391 | qc->pad_len = lsg->length & 3; | |
4392 | if (qc->pad_len) { | |
4393 | void *pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ); | |
4394 | struct scatterlist *psg = &qc->pad_sgent; | |
4395 | unsigned int offset; | |
4396 | ||
4397 | WARN_ON(qc->dev->class != ATA_DEV_ATAPI); | |
4398 | ||
4399 | memset(pad_buf, 0, ATA_DMA_PAD_SZ); | |
4400 | ||
4401 | /* | |
4402 | * psg->page/offset are used to copy to-be-written | |
4403 | * data in this function or read data in ata_sg_clean. | |
4404 | */ | |
4405 | offset = lsg->offset + lsg->length - qc->pad_len; | |
4406 | psg->page = nth_page(lsg->page, offset >> PAGE_SHIFT); | |
4407 | psg->offset = offset_in_page(offset); | |
4408 | ||
4409 | if (qc->tf.flags & ATA_TFLAG_WRITE) { | |
4410 | void *addr = kmap_atomic(psg->page, KM_IRQ0); | |
4411 | memcpy(pad_buf, addr + psg->offset, qc->pad_len); | |
4412 | kunmap_atomic(addr, KM_IRQ0); | |
4413 | } | |
4414 | ||
4415 | sg_dma_address(psg) = ap->pad_dma + (qc->tag * ATA_DMA_PAD_SZ); | |
4416 | sg_dma_len(psg) = ATA_DMA_PAD_SZ; | |
4417 | /* trim last sg */ | |
4418 | lsg->length -= qc->pad_len; | |
4419 | if (lsg->length == 0) | |
4420 | trim_sg = 1; | |
4421 | ||
4422 | DPRINTK("padding done, sg[%d].length=%u pad_len=%u\n", | |
4423 | qc->n_elem - 1, lsg->length, qc->pad_len); | |
4424 | } | |
4425 | ||
4426 | pre_n_elem = qc->n_elem; | |
4427 | if (trim_sg && pre_n_elem) | |
4428 | pre_n_elem--; | |
4429 | ||
4430 | if (!pre_n_elem) { | |
4431 | n_elem = 0; | |
4432 | goto skip_map; | |
4433 | } | |
4434 | ||
4435 | dir = qc->dma_dir; | |
4436 | n_elem = dma_map_sg(ap->dev, sg, pre_n_elem, dir); | |
4437 | if (n_elem < 1) { | |
4438 | /* restore last sg */ | |
4439 | lsg->length += qc->pad_len; | |
4440 | return -1; | |
4441 | } | |
4442 | ||
4443 | DPRINTK("%d sg elements mapped\n", n_elem); | |
4444 | ||
4445 | skip_map: | |
4446 | qc->n_elem = n_elem; | |
4447 | ||
4448 | return 0; | |
4449 | } | |
4450 | ||
4451 | /** | |
4452 | * swap_buf_le16 - swap halves of 16-bit words in place | |
4453 | * @buf: Buffer to swap | |
4454 | * @buf_words: Number of 16-bit words in buffer. | |
4455 | * | |
4456 | * Swap halves of 16-bit words if needed to convert from | |
4457 | * little-endian byte order to native cpu byte order, or | |
4458 | * vice-versa. | |
4459 | * | |
4460 | * LOCKING: | |
4461 | * Inherited from caller. | |
4462 | */ | |
4463 | void swap_buf_le16(u16 *buf, unsigned int buf_words) | |
4464 | { | |
4465 | #ifdef __BIG_ENDIAN | |
4466 | unsigned int i; | |
4467 | ||
4468 | for (i = 0; i < buf_words; i++) | |
4469 | buf[i] = le16_to_cpu(buf[i]); | |
4470 | #endif /* __BIG_ENDIAN */ | |
4471 | } | |
4472 | ||
4473 | /** | |
4474 | * ata_data_xfer - Transfer data by PIO | |
4475 | * @adev: device to target | |
4476 | * @buf: data buffer | |
4477 | * @buflen: buffer length | |
4478 | * @write_data: read/write | |
4479 | * | |
4480 | * Transfer data from/to the device data register by PIO. | |
4481 | * | |
4482 | * LOCKING: | |
4483 | * Inherited from caller. | |
4484 | */ | |
4485 | void ata_data_xfer(struct ata_device *adev, unsigned char *buf, | |
4486 | unsigned int buflen, int write_data) | |
4487 | { | |
4488 | struct ata_port *ap = adev->link->ap; | |
4489 | unsigned int words = buflen >> 1; | |
4490 | ||
4491 | /* Transfer multiple of 2 bytes */ | |
4492 | if (write_data) | |
4493 | iowrite16_rep(ap->ioaddr.data_addr, buf, words); | |
4494 | else | |
4495 | ioread16_rep(ap->ioaddr.data_addr, buf, words); | |
4496 | ||
4497 | /* Transfer trailing 1 byte, if any. */ | |
4498 | if (unlikely(buflen & 0x01)) { | |
4499 | u16 align_buf[1] = { 0 }; | |
4500 | unsigned char *trailing_buf = buf + buflen - 1; | |
4501 | ||
4502 | if (write_data) { | |
4503 | memcpy(align_buf, trailing_buf, 1); | |
4504 | iowrite16(le16_to_cpu(align_buf[0]), ap->ioaddr.data_addr); | |
4505 | } else { | |
4506 | align_buf[0] = cpu_to_le16(ioread16(ap->ioaddr.data_addr)); | |
4507 | memcpy(trailing_buf, align_buf, 1); | |
4508 | } | |
4509 | } | |
4510 | } | |
4511 | ||
4512 | /** | |
4513 | * ata_data_xfer_noirq - Transfer data by PIO | |
4514 | * @adev: device to target | |
4515 | * @buf: data buffer | |
4516 | * @buflen: buffer length | |
4517 | * @write_data: read/write | |
4518 | * | |
4519 | * Transfer data from/to the device data register by PIO. Do the | |
4520 | * transfer with interrupts disabled. | |
4521 | * | |
4522 | * LOCKING: | |
4523 | * Inherited from caller. | |
4524 | */ | |
4525 | void ata_data_xfer_noirq(struct ata_device *adev, unsigned char *buf, | |
4526 | unsigned int buflen, int write_data) | |
4527 | { | |
4528 | unsigned long flags; | |
4529 | local_irq_save(flags); | |
4530 | ata_data_xfer(adev, buf, buflen, write_data); | |
4531 | local_irq_restore(flags); | |
4532 | } | |
4533 | ||
4534 | ||
4535 | /** | |
4536 | * ata_pio_sector - Transfer a sector of data. | |
4537 | * @qc: Command on going | |
4538 | * | |
4539 | * Transfer qc->sect_size bytes of data from/to the ATA device. | |
4540 | * | |
4541 | * LOCKING: | |
4542 | * Inherited from caller. | |
4543 | */ | |
4544 | ||
4545 | static void ata_pio_sector(struct ata_queued_cmd *qc) | |
4546 | { | |
4547 | int do_write = (qc->tf.flags & ATA_TFLAG_WRITE); | |
4548 | struct scatterlist *sg = qc->__sg; | |
4549 | struct ata_port *ap = qc->ap; | |
4550 | struct page *page; | |
4551 | unsigned int offset; | |
4552 | unsigned char *buf; | |
4553 | ||
4554 | if (qc->curbytes == qc->nbytes - qc->sect_size) | |
4555 | ap->hsm_task_state = HSM_ST_LAST; | |
4556 | ||
4557 | page = sg[qc->cursg].page; | |
4558 | offset = sg[qc->cursg].offset + qc->cursg_ofs; | |
4559 | ||
4560 | /* get the current page and offset */ | |
4561 | page = nth_page(page, (offset >> PAGE_SHIFT)); | |
4562 | offset %= PAGE_SIZE; | |
4563 | ||
4564 | DPRINTK("data %s\n", qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read"); | |
4565 | ||
4566 | if (PageHighMem(page)) { | |
4567 | unsigned long flags; | |
4568 | ||
4569 | /* FIXME: use a bounce buffer */ | |
4570 | local_irq_save(flags); | |
4571 | buf = kmap_atomic(page, KM_IRQ0); | |
4572 | ||
4573 | /* do the actual data transfer */ | |
4574 | ap->ops->data_xfer(qc->dev, buf + offset, qc->sect_size, do_write); | |
4575 | ||
4576 | kunmap_atomic(buf, KM_IRQ0); | |
4577 | local_irq_restore(flags); | |
4578 | } else { | |
4579 | buf = page_address(page); | |
4580 | ap->ops->data_xfer(qc->dev, buf + offset, qc->sect_size, do_write); | |
4581 | } | |
4582 | ||
4583 | qc->curbytes += qc->sect_size; | |
4584 | qc->cursg_ofs += qc->sect_size; | |
4585 | ||
4586 | if (qc->cursg_ofs == (&sg[qc->cursg])->length) { | |
4587 | qc->cursg++; | |
4588 | qc->cursg_ofs = 0; | |
4589 | } | |
4590 | } | |
4591 | ||
4592 | /** | |
4593 | * ata_pio_sectors - Transfer one or many sectors. | |
4594 | * @qc: Command on going | |
4595 | * | |
4596 | * Transfer one or many sectors of data from/to the | |
4597 | * ATA device for the DRQ request. | |
4598 | * | |
4599 | * LOCKING: | |
4600 | * Inherited from caller. | |
4601 | */ | |
4602 | ||
4603 | static void ata_pio_sectors(struct ata_queued_cmd *qc) | |
4604 | { | |
4605 | if (is_multi_taskfile(&qc->tf)) { | |
4606 | /* READ/WRITE MULTIPLE */ | |
4607 | unsigned int nsect; | |
4608 | ||
4609 | WARN_ON(qc->dev->multi_count == 0); | |
4610 | ||
4611 | nsect = min((qc->nbytes - qc->curbytes) / qc->sect_size, | |
4612 | qc->dev->multi_count); | |
4613 | while (nsect--) | |
4614 | ata_pio_sector(qc); | |
4615 | } else | |
4616 | ata_pio_sector(qc); | |
4617 | ||
4618 | ata_altstatus(qc->ap); /* flush */ | |
4619 | } | |
4620 | ||
4621 | /** | |
4622 | * atapi_send_cdb - Write CDB bytes to hardware | |
4623 | * @ap: Port to which ATAPI device is attached. | |
4624 | * @qc: Taskfile currently active | |
4625 | * | |
4626 | * When device has indicated its readiness to accept | |
4627 | * a CDB, this function is called. Send the CDB. | |
4628 | * | |
4629 | * LOCKING: | |
4630 | * caller. | |
4631 | */ | |
4632 | ||
4633 | static void atapi_send_cdb(struct ata_port *ap, struct ata_queued_cmd *qc) | |
4634 | { | |
4635 | /* send SCSI cdb */ | |
4636 | DPRINTK("send cdb\n"); | |
4637 | WARN_ON(qc->dev->cdb_len < 12); | |
4638 | ||
4639 | ap->ops->data_xfer(qc->dev, qc->cdb, qc->dev->cdb_len, 1); | |
4640 | ata_altstatus(ap); /* flush */ | |
4641 | ||
4642 | switch (qc->tf.protocol) { | |
4643 | case ATA_PROT_ATAPI: | |
4644 | ap->hsm_task_state = HSM_ST; | |
4645 | break; | |
4646 | case ATA_PROT_ATAPI_NODATA: | |
4647 | ap->hsm_task_state = HSM_ST_LAST; | |
4648 | break; | |
4649 | case ATA_PROT_ATAPI_DMA: | |
4650 | ap->hsm_task_state = HSM_ST_LAST; | |
4651 | /* initiate bmdma */ | |
4652 | ap->ops->bmdma_start(qc); | |
4653 | break; | |
4654 | } | |
4655 | } | |
4656 | ||
4657 | /** | |
4658 | * __atapi_pio_bytes - Transfer data from/to the ATAPI device. | |
4659 | * @qc: Command on going | |
4660 | * @bytes: number of bytes | |
4661 | * | |
4662 | * Transfer Transfer data from/to the ATAPI device. | |
4663 | * | |
4664 | * LOCKING: | |
4665 | * Inherited from caller. | |
4666 | * | |
4667 | */ | |
4668 | ||
4669 | static void __atapi_pio_bytes(struct ata_queued_cmd *qc, unsigned int bytes) | |
4670 | { | |
4671 | int do_write = (qc->tf.flags & ATA_TFLAG_WRITE); | |
4672 | struct scatterlist *sg = qc->__sg; | |
4673 | struct ata_port *ap = qc->ap; | |
4674 | struct page *page; | |
4675 | unsigned char *buf; | |
4676 | unsigned int offset, count; | |
4677 | ||
4678 | if (qc->curbytes + bytes >= qc->nbytes) | |
4679 | ap->hsm_task_state = HSM_ST_LAST; | |
4680 | ||
4681 | next_sg: | |
4682 | if (unlikely(qc->cursg >= qc->n_elem)) { | |
4683 | /* | |
4684 | * The end of qc->sg is reached and the device expects | |
4685 | * more data to transfer. In order not to overrun qc->sg | |
4686 | * and fulfill length specified in the byte count register, | |
4687 | * - for read case, discard trailing data from the device | |
4688 | * - for write case, padding zero data to the device | |
4689 | */ | |
4690 | u16 pad_buf[1] = { 0 }; | |
4691 | unsigned int words = bytes >> 1; | |
4692 | unsigned int i; | |
4693 | ||
4694 | if (words) /* warning if bytes > 1 */ | |
4695 | ata_dev_printk(qc->dev, KERN_WARNING, | |
4696 | "%u bytes trailing data\n", bytes); | |
4697 | ||
4698 | for (i = 0; i < words; i++) | |
4699 | ap->ops->data_xfer(qc->dev, (unsigned char*)pad_buf, 2, do_write); | |
4700 | ||
4701 | ap->hsm_task_state = HSM_ST_LAST; | |
4702 | return; | |
4703 | } | |
4704 | ||
4705 | sg = &qc->__sg[qc->cursg]; | |
4706 | ||
4707 | page = sg->page; | |
4708 | offset = sg->offset + qc->cursg_ofs; | |
4709 | ||
4710 | /* get the current page and offset */ | |
4711 | page = nth_page(page, (offset >> PAGE_SHIFT)); | |
4712 | offset %= PAGE_SIZE; | |
4713 | ||
4714 | /* don't overrun current sg */ | |
4715 | count = min(sg->length - qc->cursg_ofs, bytes); | |
4716 | ||
4717 | /* don't cross page boundaries */ | |
4718 | count = min(count, (unsigned int)PAGE_SIZE - offset); | |
4719 | ||
4720 | DPRINTK("data %s\n", qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read"); | |
4721 | ||
4722 | if (PageHighMem(page)) { | |
4723 | unsigned long flags; | |
4724 | ||
4725 | /* FIXME: use bounce buffer */ | |
4726 | local_irq_save(flags); | |
4727 | buf = kmap_atomic(page, KM_IRQ0); | |
4728 | ||
4729 | /* do the actual data transfer */ | |
4730 | ap->ops->data_xfer(qc->dev, buf + offset, count, do_write); | |
4731 | ||
4732 | kunmap_atomic(buf, KM_IRQ0); | |
4733 | local_irq_restore(flags); | |
4734 | } else { | |
4735 | buf = page_address(page); | |
4736 | ap->ops->data_xfer(qc->dev, buf + offset, count, do_write); | |
4737 | } | |
4738 | ||
4739 | bytes -= count; | |
4740 | qc->curbytes += count; | |
4741 | qc->cursg_ofs += count; | |
4742 | ||
4743 | if (qc->cursg_ofs == sg->length) { | |
4744 | qc->cursg++; | |
4745 | qc->cursg_ofs = 0; | |
4746 | } | |
4747 | ||
4748 | if (bytes) | |
4749 | goto next_sg; | |
4750 | } | |
4751 | ||
4752 | /** | |
4753 | * atapi_pio_bytes - Transfer data from/to the ATAPI device. | |
4754 | * @qc: Command on going | |
4755 | * | |
4756 | * Transfer Transfer data from/to the ATAPI device. | |
4757 | * | |
4758 | * LOCKING: | |
4759 | * Inherited from caller. | |
4760 | */ | |
4761 | ||
4762 | static void atapi_pio_bytes(struct ata_queued_cmd *qc) | |
4763 | { | |
4764 | struct ata_port *ap = qc->ap; | |
4765 | struct ata_device *dev = qc->dev; | |
4766 | unsigned int ireason, bc_lo, bc_hi, bytes; | |
4767 | int i_write, do_write = (qc->tf.flags & ATA_TFLAG_WRITE) ? 1 : 0; | |
4768 | ||
4769 | /* Abuse qc->result_tf for temp storage of intermediate TF | |
4770 | * here to save some kernel stack usage. | |
4771 | * For normal completion, qc->result_tf is not relevant. For | |
4772 | * error, qc->result_tf is later overwritten by ata_qc_complete(). | |
4773 | * So, the correctness of qc->result_tf is not affected. | |
4774 | */ | |
4775 | ap->ops->tf_read(ap, &qc->result_tf); | |
4776 | ireason = qc->result_tf.nsect; | |
4777 | bc_lo = qc->result_tf.lbam; | |
4778 | bc_hi = qc->result_tf.lbah; | |
4779 | bytes = (bc_hi << 8) | bc_lo; | |
4780 | ||
4781 | /* shall be cleared to zero, indicating xfer of data */ | |
4782 | if (ireason & (1 << 0)) | |
4783 | goto err_out; | |
4784 | ||
4785 | /* make sure transfer direction matches expected */ | |
4786 | i_write = ((ireason & (1 << 1)) == 0) ? 1 : 0; | |
4787 | if (do_write != i_write) | |
4788 | goto err_out; | |
4789 | ||
4790 | VPRINTK("ata%u: xfering %d bytes\n", ap->print_id, bytes); | |
4791 | ||
4792 | __atapi_pio_bytes(qc, bytes); | |
4793 | ata_altstatus(ap); /* flush */ | |
4794 | ||
4795 | return; | |
4796 | ||
4797 | err_out: | |
4798 | ata_dev_printk(dev, KERN_INFO, "ATAPI check failed\n"); | |
4799 | qc->err_mask |= AC_ERR_HSM; | |
4800 | ap->hsm_task_state = HSM_ST_ERR; | |
4801 | } | |
4802 | ||
4803 | /** | |
4804 | * ata_hsm_ok_in_wq - Check if the qc can be handled in the workqueue. | |
4805 | * @ap: the target ata_port | |
4806 | * @qc: qc on going | |
4807 | * | |
4808 | * RETURNS: | |
4809 | * 1 if ok in workqueue, 0 otherwise. | |
4810 | */ | |
4811 | ||
4812 | static inline int ata_hsm_ok_in_wq(struct ata_port *ap, struct ata_queued_cmd *qc) | |
4813 | { | |
4814 | if (qc->tf.flags & ATA_TFLAG_POLLING) | |
4815 | return 1; | |
4816 | ||
4817 | if (ap->hsm_task_state == HSM_ST_FIRST) { | |
4818 | if (qc->tf.protocol == ATA_PROT_PIO && | |
4819 | (qc->tf.flags & ATA_TFLAG_WRITE)) | |
4820 | return 1; | |
4821 | ||
4822 | if (is_atapi_taskfile(&qc->tf) && | |
4823 | !(qc->dev->flags & ATA_DFLAG_CDB_INTR)) | |
4824 | return 1; | |
4825 | } | |
4826 | ||
4827 | return 0; | |
4828 | } | |
4829 | ||
4830 | /** | |
4831 | * ata_hsm_qc_complete - finish a qc running on standard HSM | |
4832 | * @qc: Command to complete | |
4833 | * @in_wq: 1 if called from workqueue, 0 otherwise | |
4834 | * | |
4835 | * Finish @qc which is running on standard HSM. | |
4836 | * | |
4837 | * LOCKING: | |
4838 | * If @in_wq is zero, spin_lock_irqsave(host lock). | |
4839 | * Otherwise, none on entry and grabs host lock. | |
4840 | */ | |
4841 | static void ata_hsm_qc_complete(struct ata_queued_cmd *qc, int in_wq) | |
4842 | { | |
4843 | struct ata_port *ap = qc->ap; | |
4844 | unsigned long flags; | |
4845 | ||
4846 | if (ap->ops->error_handler) { | |
4847 | if (in_wq) { | |
4848 | spin_lock_irqsave(ap->lock, flags); | |
4849 | ||
4850 | /* EH might have kicked in while host lock is | |
4851 | * released. | |
4852 | */ | |
4853 | qc = ata_qc_from_tag(ap, qc->tag); | |
4854 | if (qc) { | |
4855 | if (likely(!(qc->err_mask & AC_ERR_HSM))) { | |
4856 | ap->ops->irq_on(ap); | |
4857 | ata_qc_complete(qc); | |
4858 | } else | |
4859 | ata_port_freeze(ap); | |
4860 | } | |
4861 | ||
4862 | spin_unlock_irqrestore(ap->lock, flags); | |
4863 | } else { | |
4864 | if (likely(!(qc->err_mask & AC_ERR_HSM))) | |
4865 | ata_qc_complete(qc); | |
4866 | else | |
4867 | ata_port_freeze(ap); | |
4868 | } | |
4869 | } else { | |
4870 | if (in_wq) { | |
4871 | spin_lock_irqsave(ap->lock, flags); | |
4872 | ap->ops->irq_on(ap); | |
4873 | ata_qc_complete(qc); | |
4874 | spin_unlock_irqrestore(ap->lock, flags); | |
4875 | } else | |
4876 | ata_qc_complete(qc); | |
4877 | } | |
4878 | } | |
4879 | ||
4880 | /** | |
4881 | * ata_hsm_move - move the HSM to the next state. | |
4882 | * @ap: the target ata_port | |
4883 | * @qc: qc on going | |
4884 | * @status: current device status | |
4885 | * @in_wq: 1 if called from workqueue, 0 otherwise | |
4886 | * | |
4887 | * RETURNS: | |
4888 | * 1 when poll next status needed, 0 otherwise. | |
4889 | */ | |
4890 | int ata_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc, | |
4891 | u8 status, int in_wq) | |
4892 | { | |
4893 | unsigned long flags = 0; | |
4894 | int poll_next; | |
4895 | ||
4896 | WARN_ON((qc->flags & ATA_QCFLAG_ACTIVE) == 0); | |
4897 | ||
4898 | /* Make sure ata_qc_issue_prot() does not throw things | |
4899 | * like DMA polling into the workqueue. Notice that | |
4900 | * in_wq is not equivalent to (qc->tf.flags & ATA_TFLAG_POLLING). | |
4901 | */ | |
4902 | WARN_ON(in_wq != ata_hsm_ok_in_wq(ap, qc)); | |
4903 | ||
4904 | fsm_start: | |
4905 | DPRINTK("ata%u: protocol %d task_state %d (dev_stat 0x%X)\n", | |
4906 | ap->print_id, qc->tf.protocol, ap->hsm_task_state, status); | |
4907 | ||
4908 | switch (ap->hsm_task_state) { | |
4909 | case HSM_ST_FIRST: | |
4910 | /* Send first data block or PACKET CDB */ | |
4911 | ||
4912 | /* If polling, we will stay in the work queue after | |
4913 | * sending the data. Otherwise, interrupt handler | |
4914 | * takes over after sending the data. | |
4915 | */ | |
4916 | poll_next = (qc->tf.flags & ATA_TFLAG_POLLING); | |
4917 | ||
4918 | /* check device status */ | |
4919 | if (unlikely((status & ATA_DRQ) == 0)) { | |
4920 | /* handle BSY=0, DRQ=0 as error */ | |
4921 | if (likely(status & (ATA_ERR | ATA_DF))) | |
4922 | /* device stops HSM for abort/error */ | |
4923 | qc->err_mask |= AC_ERR_DEV; | |
4924 | else | |
4925 | /* HSM violation. Let EH handle this */ | |
4926 | qc->err_mask |= AC_ERR_HSM; | |
4927 | ||
4928 | ap->hsm_task_state = HSM_ST_ERR; | |
4929 | goto fsm_start; | |
4930 | } | |
4931 | ||
4932 | /* Device should not ask for data transfer (DRQ=1) | |
4933 | * when it finds something wrong. | |
4934 | * We ignore DRQ here and stop the HSM by | |
4935 | * changing hsm_task_state to HSM_ST_ERR and | |
4936 | * let the EH abort the command or reset the device. | |
4937 | */ | |
4938 | if (unlikely(status & (ATA_ERR | ATA_DF))) { | |
4939 | ata_port_printk(ap, KERN_WARNING, "DRQ=1 with device " | |
4940 | "error, dev_stat 0x%X\n", status); | |
4941 | qc->err_mask |= AC_ERR_HSM; | |
4942 | ap->hsm_task_state = HSM_ST_ERR; | |
4943 | goto fsm_start; | |
4944 | } | |
4945 | ||
4946 | /* Send the CDB (atapi) or the first data block (ata pio out). | |
4947 | * During the state transition, interrupt handler shouldn't | |
4948 | * be invoked before the data transfer is complete and | |
4949 | * hsm_task_state is changed. Hence, the following locking. | |
4950 | */ | |
4951 | if (in_wq) | |
4952 | spin_lock_irqsave(ap->lock, flags); | |
4953 | ||
4954 | if (qc->tf.protocol == ATA_PROT_PIO) { | |
4955 | /* PIO data out protocol. | |
4956 | * send first data block. | |
4957 | */ | |
4958 | ||
4959 | /* ata_pio_sectors() might change the state | |
4960 | * to HSM_ST_LAST. so, the state is changed here | |
4961 | * before ata_pio_sectors(). | |
4962 | */ | |
4963 | ap->hsm_task_state = HSM_ST; | |
4964 | ata_pio_sectors(qc); | |
4965 | } else | |
4966 | /* send CDB */ | |
4967 | atapi_send_cdb(ap, qc); | |
4968 | ||
4969 | if (in_wq) | |
4970 | spin_unlock_irqrestore(ap->lock, flags); | |
4971 | ||
4972 | /* if polling, ata_pio_task() handles the rest. | |
4973 | * otherwise, interrupt handler takes over from here. | |
4974 | */ | |
4975 | break; | |
4976 | ||
4977 | case HSM_ST: | |
4978 | /* complete command or read/write the data register */ | |
4979 | if (qc->tf.protocol == ATA_PROT_ATAPI) { | |
4980 | /* ATAPI PIO protocol */ | |
4981 | if ((status & ATA_DRQ) == 0) { | |
4982 | /* No more data to transfer or device error. | |
4983 | * Device error will be tagged in HSM_ST_LAST. | |
4984 | */ | |
4985 | ap->hsm_task_state = HSM_ST_LAST; | |
4986 | goto fsm_start; | |
4987 | } | |
4988 | ||
4989 | /* Device should not ask for data transfer (DRQ=1) | |
4990 | * when it finds something wrong. | |
4991 | * We ignore DRQ here and stop the HSM by | |
4992 | * changing hsm_task_state to HSM_ST_ERR and | |
4993 | * let the EH abort the command or reset the device. | |
4994 | */ | |
4995 | if (unlikely(status & (ATA_ERR | ATA_DF))) { | |
4996 | ata_port_printk(ap, KERN_WARNING, "DRQ=1 with " | |
4997 | "device error, dev_stat 0x%X\n", | |
4998 | status); | |
4999 | qc->err_mask |= AC_ERR_HSM; | |
5000 | ap->hsm_task_state = HSM_ST_ERR; | |
5001 | goto fsm_start; | |
5002 | } | |
5003 | ||
5004 | atapi_pio_bytes(qc); | |
5005 | ||
5006 | if (unlikely(ap->hsm_task_state == HSM_ST_ERR)) | |
5007 | /* bad ireason reported by device */ | |
5008 | goto fsm_start; | |
5009 | ||
5010 | } else { | |
5011 | /* ATA PIO protocol */ | |
5012 | if (unlikely((status & ATA_DRQ) == 0)) { | |
5013 | /* handle BSY=0, DRQ=0 as error */ | |
5014 | if (likely(status & (ATA_ERR | ATA_DF))) | |
5015 | /* device stops HSM for abort/error */ | |
5016 | qc->err_mask |= AC_ERR_DEV; | |
5017 | else | |
5018 | /* HSM violation. Let EH handle this. | |
5019 | * Phantom devices also trigger this | |
5020 | * condition. Mark hint. | |
5021 | */ | |
5022 | qc->err_mask |= AC_ERR_HSM | | |
5023 | AC_ERR_NODEV_HINT; | |
5024 | ||
5025 | ap->hsm_task_state = HSM_ST_ERR; | |
5026 | goto fsm_start; | |
5027 | } | |
5028 | ||
5029 | /* For PIO reads, some devices may ask for | |
5030 | * data transfer (DRQ=1) alone with ERR=1. | |
5031 | * We respect DRQ here and transfer one | |
5032 | * block of junk data before changing the | |
5033 | * hsm_task_state to HSM_ST_ERR. | |
5034 | * | |
5035 | * For PIO writes, ERR=1 DRQ=1 doesn't make | |
5036 | * sense since the data block has been | |
5037 | * transferred to the device. | |
5038 | */ | |
5039 | if (unlikely(status & (ATA_ERR | ATA_DF))) { | |
5040 | /* data might be corrputed */ | |
5041 | qc->err_mask |= AC_ERR_DEV; | |
5042 | ||
5043 | if (!(qc->tf.flags & ATA_TFLAG_WRITE)) { | |
5044 | ata_pio_sectors(qc); | |
5045 | status = ata_wait_idle(ap); | |
5046 | } | |
5047 | ||
5048 | if (status & (ATA_BUSY | ATA_DRQ)) | |
5049 | qc->err_mask |= AC_ERR_HSM; | |
5050 | ||
5051 | /* ata_pio_sectors() might change the | |
5052 | * state to HSM_ST_LAST. so, the state | |
5053 | * is changed after ata_pio_sectors(). | |
5054 | */ | |
5055 | ap->hsm_task_state = HSM_ST_ERR; | |
5056 | goto fsm_start; | |
5057 | } | |
5058 | ||
5059 | ata_pio_sectors(qc); | |
5060 | ||
5061 | if (ap->hsm_task_state == HSM_ST_LAST && | |
5062 | (!(qc->tf.flags & ATA_TFLAG_WRITE))) { | |
5063 | /* all data read */ | |
5064 | status = ata_wait_idle(ap); | |
5065 | goto fsm_start; | |
5066 | } | |
5067 | } | |
5068 | ||
5069 | poll_next = 1; | |
5070 | break; | |
5071 | ||
5072 | case HSM_ST_LAST: | |
5073 | if (unlikely(!ata_ok(status))) { | |
5074 | qc->err_mask |= __ac_err_mask(status); | |
5075 | ap->hsm_task_state = HSM_ST_ERR; | |
5076 | goto fsm_start; | |
5077 | } | |
5078 | ||
5079 | /* no more data to transfer */ | |
5080 | DPRINTK("ata%u: dev %u command complete, drv_stat 0x%x\n", | |
5081 | ap->print_id, qc->dev->devno, status); | |
5082 | ||
5083 | WARN_ON(qc->err_mask); | |
5084 | ||
5085 | ap->hsm_task_state = HSM_ST_IDLE; | |
5086 | ||
5087 | /* complete taskfile transaction */ | |
5088 | ata_hsm_qc_complete(qc, in_wq); | |
5089 | ||
5090 | poll_next = 0; | |
5091 | break; | |
5092 | ||
5093 | case HSM_ST_ERR: | |
5094 | /* make sure qc->err_mask is available to | |
5095 | * know what's wrong and recover | |
5096 | */ | |
5097 | WARN_ON(qc->err_mask == 0); | |
5098 | ||
5099 | ap->hsm_task_state = HSM_ST_IDLE; | |
5100 | ||
5101 | /* complete taskfile transaction */ | |
5102 | ata_hsm_qc_complete(qc, in_wq); | |
5103 | ||
5104 | poll_next = 0; | |
5105 | break; | |
5106 | default: | |
5107 | poll_next = 0; | |
5108 | BUG(); | |
5109 | } | |
5110 | ||
5111 | return poll_next; | |
5112 | } | |
5113 | ||
5114 | static void ata_pio_task(struct work_struct *work) | |
5115 | { | |
5116 | struct ata_port *ap = | |
5117 | container_of(work, struct ata_port, port_task.work); | |
5118 | struct ata_queued_cmd *qc = ap->port_task_data; | |
5119 | u8 status; | |
5120 | int poll_next; | |
5121 | ||
5122 | fsm_start: | |
5123 | WARN_ON(ap->hsm_task_state == HSM_ST_IDLE); | |
5124 | ||
5125 | /* | |
5126 | * This is purely heuristic. This is a fast path. | |
5127 | * Sometimes when we enter, BSY will be cleared in | |
5128 | * a chk-status or two. If not, the drive is probably seeking | |
5129 | * or something. Snooze for a couple msecs, then | |
5130 | * chk-status again. If still busy, queue delayed work. | |
5131 | */ | |
5132 | status = ata_busy_wait(ap, ATA_BUSY, 5); | |
5133 | if (status & ATA_BUSY) { | |
5134 | msleep(2); | |
5135 | status = ata_busy_wait(ap, ATA_BUSY, 10); | |
5136 | if (status & ATA_BUSY) { | |
5137 | ata_port_queue_task(ap, ata_pio_task, qc, ATA_SHORT_PAUSE); | |
5138 | return; | |
5139 | } | |
5140 | } | |
5141 | ||
5142 | /* move the HSM */ | |
5143 | poll_next = ata_hsm_move(ap, qc, status, 1); | |
5144 | ||
5145 | /* another command or interrupt handler | |
5146 | * may be running at this point. | |
5147 | */ | |
5148 | if (poll_next) | |
5149 | goto fsm_start; | |
5150 | } | |
5151 | ||
5152 | /** | |
5153 | * ata_qc_new - Request an available ATA command, for queueing | |
5154 | * @ap: Port associated with device @dev | |
5155 | * @dev: Device from whom we request an available command structure | |
5156 | * | |
5157 | * LOCKING: | |
5158 | * None. | |
5159 | */ | |
5160 | ||
5161 | static struct ata_queued_cmd *ata_qc_new(struct ata_port *ap) | |
5162 | { | |
5163 | struct ata_queued_cmd *qc = NULL; | |
5164 | unsigned int i; | |
5165 | ||
5166 | /* no command while frozen */ | |
5167 | if (unlikely(ap->pflags & ATA_PFLAG_FROZEN)) | |
5168 | return NULL; | |
5169 | ||
5170 | /* the last tag is reserved for internal command. */ | |
5171 | for (i = 0; i < ATA_MAX_QUEUE - 1; i++) | |
5172 | if (!test_and_set_bit(i, &ap->qc_allocated)) { | |
5173 | qc = __ata_qc_from_tag(ap, i); | |
5174 | break; | |
5175 | } | |
5176 | ||
5177 | if (qc) | |
5178 | qc->tag = i; | |
5179 | ||
5180 | return qc; | |
5181 | } | |
5182 | ||
5183 | /** | |
5184 | * ata_qc_new_init - Request an available ATA command, and initialize it | |
5185 | * @dev: Device from whom we request an available command structure | |
5186 | * | |
5187 | * LOCKING: | |
5188 | * None. | |
5189 | */ | |
5190 | ||
5191 | struct ata_queued_cmd *ata_qc_new_init(struct ata_device *dev) | |
5192 | { | |
5193 | struct ata_port *ap = dev->link->ap; | |
5194 | struct ata_queued_cmd *qc; | |
5195 | ||
5196 | qc = ata_qc_new(ap); | |
5197 | if (qc) { | |
5198 | qc->scsicmd = NULL; | |
5199 | qc->ap = ap; | |
5200 | qc->dev = dev; | |
5201 | ||
5202 | ata_qc_reinit(qc); | |
5203 | } | |
5204 | ||
5205 | return qc; | |
5206 | } | |
5207 | ||
5208 | /** | |
5209 | * ata_qc_free - free unused ata_queued_cmd | |
5210 | * @qc: Command to complete | |
5211 | * | |
5212 | * Designed to free unused ata_queued_cmd object | |
5213 | * in case something prevents using it. | |
5214 | * | |
5215 | * LOCKING: | |
5216 | * spin_lock_irqsave(host lock) | |
5217 | */ | |
5218 | void ata_qc_free(struct ata_queued_cmd *qc) | |
5219 | { | |
5220 | struct ata_port *ap = qc->ap; | |
5221 | unsigned int tag; | |
5222 | ||
5223 | WARN_ON(qc == NULL); /* ata_qc_from_tag _might_ return NULL */ | |
5224 | ||
5225 | qc->flags = 0; | |
5226 | tag = qc->tag; | |
5227 | if (likely(ata_tag_valid(tag))) { | |
5228 | qc->tag = ATA_TAG_POISON; | |
5229 | clear_bit(tag, &ap->qc_allocated); | |
5230 | } | |
5231 | } | |
5232 | ||
5233 | void __ata_qc_complete(struct ata_queued_cmd *qc) | |
5234 | { | |
5235 | struct ata_port *ap = qc->ap; | |
5236 | struct ata_link *link = qc->dev->link; | |
5237 | ||
5238 | WARN_ON(qc == NULL); /* ata_qc_from_tag _might_ return NULL */ | |
5239 | WARN_ON(!(qc->flags & ATA_QCFLAG_ACTIVE)); | |
5240 | ||
5241 | if (likely(qc->flags & ATA_QCFLAG_DMAMAP)) | |
5242 | ata_sg_clean(qc); | |
5243 | ||
5244 | /* command should be marked inactive atomically with qc completion */ | |
5245 | if (qc->tf.protocol == ATA_PROT_NCQ) | |
5246 | link->sactive &= ~(1 << qc->tag); | |
5247 | else | |
5248 | link->active_tag = ATA_TAG_POISON; | |
5249 | ||
5250 | /* atapi: mark qc as inactive to prevent the interrupt handler | |
5251 | * from completing the command twice later, before the error handler | |
5252 | * is called. (when rc != 0 and atapi request sense is needed) | |
5253 | */ | |
5254 | qc->flags &= ~ATA_QCFLAG_ACTIVE; | |
5255 | ap->qc_active &= ~(1 << qc->tag); | |
5256 | ||
5257 | /* call completion callback */ | |
5258 | qc->complete_fn(qc); | |
5259 | } | |
5260 | ||
5261 | static void fill_result_tf(struct ata_queued_cmd *qc) | |
5262 | { | |
5263 | struct ata_port *ap = qc->ap; | |
5264 | ||
5265 | qc->result_tf.flags = qc->tf.flags; | |
5266 | ap->ops->tf_read(ap, &qc->result_tf); | |
5267 | } | |
5268 | ||
5269 | /** | |
5270 | * ata_qc_complete - Complete an active ATA command | |
5271 | * @qc: Command to complete | |
5272 | * @err_mask: ATA Status register contents | |
5273 | * | |
5274 | * Indicate to the mid and upper layers that an ATA | |
5275 | * command has completed, with either an ok or not-ok status. | |
5276 | * | |
5277 | * LOCKING: | |
5278 | * spin_lock_irqsave(host lock) | |
5279 | */ | |
5280 | void ata_qc_complete(struct ata_queued_cmd *qc) | |
5281 | { | |
5282 | struct ata_port *ap = qc->ap; | |
5283 | ||
5284 | /* XXX: New EH and old EH use different mechanisms to | |
5285 | * synchronize EH with regular execution path. | |
5286 | * | |
5287 | * In new EH, a failed qc is marked with ATA_QCFLAG_FAILED. | |
5288 | * Normal execution path is responsible for not accessing a | |
5289 | * failed qc. libata core enforces the rule by returning NULL | |
5290 | * from ata_qc_from_tag() for failed qcs. | |
5291 | * | |
5292 | * Old EH depends on ata_qc_complete() nullifying completion | |
5293 | * requests if ATA_QCFLAG_EH_SCHEDULED is set. Old EH does | |
5294 | * not synchronize with interrupt handler. Only PIO task is | |
5295 | * taken care of. | |
5296 | */ | |
5297 | if (ap->ops->error_handler) { | |
5298 | WARN_ON(ap->pflags & ATA_PFLAG_FROZEN); | |
5299 | ||
5300 | if (unlikely(qc->err_mask)) | |
5301 | qc->flags |= ATA_QCFLAG_FAILED; | |
5302 | ||
5303 | if (unlikely(qc->flags & ATA_QCFLAG_FAILED)) { | |
5304 | if (!ata_tag_internal(qc->tag)) { | |
5305 | /* always fill result TF for failed qc */ | |
5306 | fill_result_tf(qc); | |
5307 | ata_qc_schedule_eh(qc); | |
5308 | return; | |
5309 | } | |
5310 | } | |
5311 | ||
5312 | /* read result TF if requested */ | |
5313 | if (qc->flags & ATA_QCFLAG_RESULT_TF) | |
5314 | fill_result_tf(qc); | |
5315 | ||
5316 | __ata_qc_complete(qc); | |
5317 | } else { | |
5318 | if (qc->flags & ATA_QCFLAG_EH_SCHEDULED) | |
5319 | return; | |
5320 | ||
5321 | /* read result TF if failed or requested */ | |
5322 | if (qc->err_mask || qc->flags & ATA_QCFLAG_RESULT_TF) | |
5323 | fill_result_tf(qc); | |
5324 | ||
5325 | __ata_qc_complete(qc); | |
5326 | } | |
5327 | } | |
5328 | ||
5329 | /** | |
5330 | * ata_qc_complete_multiple - Complete multiple qcs successfully | |
5331 | * @ap: port in question | |
5332 | * @qc_active: new qc_active mask | |
5333 | * @finish_qc: LLDD callback invoked before completing a qc | |
5334 | * | |
5335 | * Complete in-flight commands. This functions is meant to be | |
5336 | * called from low-level driver's interrupt routine to complete | |
5337 | * requests normally. ap->qc_active and @qc_active is compared | |
5338 | * and commands are completed accordingly. | |
5339 | * | |
5340 | * LOCKING: | |
5341 | * spin_lock_irqsave(host lock) | |
5342 | * | |
5343 | * RETURNS: | |
5344 | * Number of completed commands on success, -errno otherwise. | |
5345 | */ | |
5346 | int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active, | |
5347 | void (*finish_qc)(struct ata_queued_cmd *)) | |
5348 | { | |
5349 | int nr_done = 0; | |
5350 | u32 done_mask; | |
5351 | int i; | |
5352 | ||
5353 | done_mask = ap->qc_active ^ qc_active; | |
5354 | ||
5355 | if (unlikely(done_mask & qc_active)) { | |
5356 | ata_port_printk(ap, KERN_ERR, "illegal qc_active transition " | |
5357 | "(%08x->%08x)\n", ap->qc_active, qc_active); | |
5358 | return -EINVAL; | |
5359 | } | |
5360 | ||
5361 | for (i = 0; i < ATA_MAX_QUEUE; i++) { | |
5362 | struct ata_queued_cmd *qc; | |
5363 | ||
5364 | if (!(done_mask & (1 << i))) | |
5365 | continue; | |
5366 | ||
5367 | if ((qc = ata_qc_from_tag(ap, i))) { | |
5368 | if (finish_qc) | |
5369 | finish_qc(qc); | |
5370 | ata_qc_complete(qc); | |
5371 | nr_done++; | |
5372 | } | |
5373 | } | |
5374 | ||
5375 | return nr_done; | |
5376 | } | |
5377 | ||
5378 | static inline int ata_should_dma_map(struct ata_queued_cmd *qc) | |
5379 | { | |
5380 | struct ata_port *ap = qc->ap; | |
5381 | ||
5382 | switch (qc->tf.protocol) { | |
5383 | case ATA_PROT_NCQ: | |
5384 | case ATA_PROT_DMA: | |
5385 | case ATA_PROT_ATAPI_DMA: | |
5386 | return 1; | |
5387 | ||
5388 | case ATA_PROT_ATAPI: | |
5389 | case ATA_PROT_PIO: | |
5390 | if (ap->flags & ATA_FLAG_PIO_DMA) | |
5391 | return 1; | |
5392 | ||
5393 | /* fall through */ | |
5394 | ||
5395 | default: | |
5396 | return 0; | |
5397 | } | |
5398 | ||
5399 | /* never reached */ | |
5400 | } | |
5401 | ||
5402 | /** | |
5403 | * ata_qc_issue - issue taskfile to device | |
5404 | * @qc: command to issue to device | |
5405 | * | |
5406 | * Prepare an ATA command to submission to device. | |
5407 | * This includes mapping the data into a DMA-able | |
5408 | * area, filling in the S/G table, and finally | |
5409 | * writing the taskfile to hardware, starting the command. | |
5410 | * | |
5411 | * LOCKING: | |
5412 | * spin_lock_irqsave(host lock) | |
5413 | */ | |
5414 | void ata_qc_issue(struct ata_queued_cmd *qc) | |
5415 | { | |
5416 | struct ata_port *ap = qc->ap; | |
5417 | struct ata_link *link = qc->dev->link; | |
5418 | ||
5419 | /* Make sure only one non-NCQ command is outstanding. The | |
5420 | * check is skipped for old EH because it reuses active qc to | |
5421 | * request ATAPI sense. | |
5422 | */ | |
5423 | WARN_ON(ap->ops->error_handler && ata_tag_valid(link->active_tag)); | |
5424 | ||
5425 | if (qc->tf.protocol == ATA_PROT_NCQ) { | |
5426 | WARN_ON(link->sactive & (1 << qc->tag)); | |
5427 | link->sactive |= 1 << qc->tag; | |
5428 | } else { | |
5429 | WARN_ON(link->sactive); | |
5430 | link->active_tag = qc->tag; | |
5431 | } | |
5432 | ||
5433 | qc->flags |= ATA_QCFLAG_ACTIVE; | |
5434 | ap->qc_active |= 1 << qc->tag; | |
5435 | ||
5436 | if (ata_should_dma_map(qc)) { | |
5437 | if (qc->flags & ATA_QCFLAG_SG) { | |
5438 | if (ata_sg_setup(qc)) | |
5439 | goto sg_err; | |
5440 | } else if (qc->flags & ATA_QCFLAG_SINGLE) { | |
5441 | if (ata_sg_setup_one(qc)) | |
5442 | goto sg_err; | |
5443 | } | |
5444 | } else { | |
5445 | qc->flags &= ~ATA_QCFLAG_DMAMAP; | |
5446 | } | |
5447 | ||
5448 | ap->ops->qc_prep(qc); | |
5449 | ||
5450 | qc->err_mask |= ap->ops->qc_issue(qc); | |
5451 | if (unlikely(qc->err_mask)) | |
5452 | goto err; | |
5453 | return; | |
5454 | ||
5455 | sg_err: | |
5456 | qc->flags &= ~ATA_QCFLAG_DMAMAP; | |
5457 | qc->err_mask |= AC_ERR_SYSTEM; | |
5458 | err: | |
5459 | ata_qc_complete(qc); | |
5460 | } | |
5461 | ||
5462 | /** | |
5463 | * ata_qc_issue_prot - issue taskfile to device in proto-dependent manner | |
5464 | * @qc: command to issue to device | |
5465 | * | |
5466 | * Using various libata functions and hooks, this function | |
5467 | * starts an ATA command. ATA commands are grouped into | |
5468 | * classes called "protocols", and issuing each type of protocol | |
5469 | * is slightly different. | |
5470 | * | |
5471 | * May be used as the qc_issue() entry in ata_port_operations. | |
5472 | * | |
5473 | * LOCKING: | |
5474 | * spin_lock_irqsave(host lock) | |
5475 | * | |
5476 | * RETURNS: | |
5477 | * Zero on success, AC_ERR_* mask on failure | |
5478 | */ | |
5479 | ||
5480 | unsigned int ata_qc_issue_prot(struct ata_queued_cmd *qc) | |
5481 | { | |
5482 | struct ata_port *ap = qc->ap; | |
5483 | ||
5484 | /* Use polling pio if the LLD doesn't handle | |
5485 | * interrupt driven pio and atapi CDB interrupt. | |
5486 | */ | |
5487 | if (ap->flags & ATA_FLAG_PIO_POLLING) { | |
5488 | switch (qc->tf.protocol) { | |
5489 | case ATA_PROT_PIO: | |
5490 | case ATA_PROT_NODATA: | |
5491 | case ATA_PROT_ATAPI: | |
5492 | case ATA_PROT_ATAPI_NODATA: | |
5493 | qc->tf.flags |= ATA_TFLAG_POLLING; | |
5494 | break; | |
5495 | case ATA_PROT_ATAPI_DMA: | |
5496 | if (qc->dev->flags & ATA_DFLAG_CDB_INTR) | |
5497 | /* see ata_dma_blacklisted() */ | |
5498 | BUG(); | |
5499 | break; | |
5500 | default: | |
5501 | break; | |
5502 | } | |
5503 | } | |
5504 | ||
5505 | /* select the device */ | |
5506 | ata_dev_select(ap, qc->dev->devno, 1, 0); | |
5507 | ||
5508 | /* start the command */ | |
5509 | switch (qc->tf.protocol) { | |
5510 | case ATA_PROT_NODATA: | |
5511 | if (qc->tf.flags & ATA_TFLAG_POLLING) | |
5512 | ata_qc_set_polling(qc); | |
5513 | ||
5514 | ata_tf_to_host(ap, &qc->tf); | |
5515 | ap->hsm_task_state = HSM_ST_LAST; | |
5516 | ||
5517 | if (qc->tf.flags & ATA_TFLAG_POLLING) | |
5518 | ata_port_queue_task(ap, ata_pio_task, qc, 0); | |
5519 | ||
5520 | break; | |
5521 | ||
5522 | case ATA_PROT_DMA: | |
5523 | WARN_ON(qc->tf.flags & ATA_TFLAG_POLLING); | |
5524 | ||
5525 | ap->ops->tf_load(ap, &qc->tf); /* load tf registers */ | |
5526 | ap->ops->bmdma_setup(qc); /* set up bmdma */ | |
5527 | ap->ops->bmdma_start(qc); /* initiate bmdma */ | |
5528 | ap->hsm_task_state = HSM_ST_LAST; | |
5529 | break; | |
5530 | ||
5531 | case ATA_PROT_PIO: | |
5532 | if (qc->tf.flags & ATA_TFLAG_POLLING) | |
5533 | ata_qc_set_polling(qc); | |
5534 | ||
5535 | ata_tf_to_host(ap, &qc->tf); | |
5536 | ||
5537 | if (qc->tf.flags & ATA_TFLAG_WRITE) { | |
5538 | /* PIO data out protocol */ | |
5539 | ap->hsm_task_state = HSM_ST_FIRST; | |
5540 | ata_port_queue_task(ap, ata_pio_task, qc, 0); | |
5541 | ||
5542 | /* always send first data block using | |
5543 | * the ata_pio_task() codepath. | |
5544 | */ | |
5545 | } else { | |
5546 | /* PIO data in protocol */ | |
5547 | ap->hsm_task_state = HSM_ST; | |
5548 | ||
5549 | if (qc->tf.flags & ATA_TFLAG_POLLING) | |
5550 | ata_port_queue_task(ap, ata_pio_task, qc, 0); | |
5551 | ||
5552 | /* if polling, ata_pio_task() handles the rest. | |
5553 | * otherwise, interrupt handler takes over from here. | |
5554 | */ | |
5555 | } | |
5556 | ||
5557 | break; | |
5558 | ||
5559 | case ATA_PROT_ATAPI: | |
5560 | case ATA_PROT_ATAPI_NODATA: | |
5561 | if (qc->tf.flags & ATA_TFLAG_POLLING) | |
5562 | ata_qc_set_polling(qc); | |
5563 | ||
5564 | ata_tf_to_host(ap, &qc->tf); | |
5565 | ||
5566 | ap->hsm_task_state = HSM_ST_FIRST; | |
5567 | ||
5568 | /* send cdb by polling if no cdb interrupt */ | |
5569 | if ((!(qc->dev->flags & ATA_DFLAG_CDB_INTR)) || | |
5570 | (qc->tf.flags & ATA_TFLAG_POLLING)) | |
5571 | ata_port_queue_task(ap, ata_pio_task, qc, 0); | |
5572 | break; | |
5573 | ||
5574 | case ATA_PROT_ATAPI_DMA: | |
5575 | WARN_ON(qc->tf.flags & ATA_TFLAG_POLLING); | |
5576 | ||
5577 | ap->ops->tf_load(ap, &qc->tf); /* load tf registers */ | |
5578 | ap->ops->bmdma_setup(qc); /* set up bmdma */ | |
5579 | ap->hsm_task_state = HSM_ST_FIRST; | |
5580 | ||
5581 | /* send cdb by polling if no cdb interrupt */ | |
5582 | if (!(qc->dev->flags & ATA_DFLAG_CDB_INTR)) | |
5583 | ata_port_queue_task(ap, ata_pio_task, qc, 0); | |
5584 | break; | |
5585 | ||
5586 | default: | |
5587 | WARN_ON(1); | |
5588 | return AC_ERR_SYSTEM; | |
5589 | } | |
5590 | ||
5591 | return 0; | |
5592 | } | |
5593 | ||
5594 | /** | |
5595 | * ata_host_intr - Handle host interrupt for given (port, task) | |
5596 | * @ap: Port on which interrupt arrived (possibly...) | |
5597 | * @qc: Taskfile currently active in engine | |
5598 | * | |
5599 | * Handle host interrupt for given queued command. Currently, | |
5600 | * only DMA interrupts are handled. All other commands are | |
5601 | * handled via polling with interrupts disabled (nIEN bit). | |
5602 | * | |
5603 | * LOCKING: | |
5604 | * spin_lock_irqsave(host lock) | |
5605 | * | |
5606 | * RETURNS: | |
5607 | * One if interrupt was handled, zero if not (shared irq). | |
5608 | */ | |
5609 | ||
5610 | inline unsigned int ata_host_intr (struct ata_port *ap, | |
5611 | struct ata_queued_cmd *qc) | |
5612 | { | |
5613 | struct ata_eh_info *ehi = &ap->link.eh_info; | |
5614 | u8 status, host_stat = 0; | |
5615 | ||
5616 | VPRINTK("ata%u: protocol %d task_state %d\n", | |
5617 | ap->print_id, qc->tf.protocol, ap->hsm_task_state); | |
5618 | ||
5619 | /* Check whether we are expecting interrupt in this state */ | |
5620 | switch (ap->hsm_task_state) { | |
5621 | case HSM_ST_FIRST: | |
5622 | /* Some pre-ATAPI-4 devices assert INTRQ | |
5623 | * at this state when ready to receive CDB. | |
5624 | */ | |
5625 | ||
5626 | /* Check the ATA_DFLAG_CDB_INTR flag is enough here. | |
5627 | * The flag was turned on only for atapi devices. | |
5628 | * No need to check is_atapi_taskfile(&qc->tf) again. | |
5629 | */ | |
5630 | if (!(qc->dev->flags & ATA_DFLAG_CDB_INTR)) | |
5631 | goto idle_irq; | |
5632 | break; | |
5633 | case HSM_ST_LAST: | |
5634 | if (qc->tf.protocol == ATA_PROT_DMA || | |
5635 | qc->tf.protocol == ATA_PROT_ATAPI_DMA) { | |
5636 | /* check status of DMA engine */ | |
5637 | host_stat = ap->ops->bmdma_status(ap); | |
5638 | VPRINTK("ata%u: host_stat 0x%X\n", | |
5639 | ap->print_id, host_stat); | |
5640 | ||
5641 | /* if it's not our irq... */ | |
5642 | if (!(host_stat & ATA_DMA_INTR)) | |
5643 | goto idle_irq; | |
5644 | ||
5645 | /* before we do anything else, clear DMA-Start bit */ | |
5646 | ap->ops->bmdma_stop(qc); | |
5647 | ||
5648 | if (unlikely(host_stat & ATA_DMA_ERR)) { | |
5649 | /* error when transfering data to/from memory */ | |
5650 | qc->err_mask |= AC_ERR_HOST_BUS; | |
5651 | ap->hsm_task_state = HSM_ST_ERR; | |
5652 | } | |
5653 | } | |
5654 | break; | |
5655 | case HSM_ST: | |
5656 | break; | |
5657 | default: | |
5658 | goto idle_irq; | |
5659 | } | |
5660 | ||
5661 | /* check altstatus */ | |
5662 | status = ata_altstatus(ap); | |
5663 | if (status & ATA_BUSY) | |
5664 | goto idle_irq; | |
5665 | ||
5666 | /* check main status, clearing INTRQ */ | |
5667 | status = ata_chk_status(ap); | |
5668 | if (unlikely(status & ATA_BUSY)) | |
5669 | goto idle_irq; | |
5670 | ||
5671 | /* ack bmdma irq events */ | |
5672 | ap->ops->irq_clear(ap); | |
5673 | ||
5674 | ata_hsm_move(ap, qc, status, 0); | |
5675 | ||
5676 | if (unlikely(qc->err_mask) && (qc->tf.protocol == ATA_PROT_DMA || | |
5677 | qc->tf.protocol == ATA_PROT_ATAPI_DMA)) | |
5678 | ata_ehi_push_desc(ehi, "BMDMA stat 0x%x", host_stat); | |
5679 | ||
5680 | return 1; /* irq handled */ | |
5681 | ||
5682 | idle_irq: | |
5683 | ap->stats.idle_irq++; | |
5684 | ||
5685 | #ifdef ATA_IRQ_TRAP | |
5686 | if ((ap->stats.idle_irq % 1000) == 0) { | |
5687 | ap->ops->irq_ack(ap, 0); /* debug trap */ | |
5688 | ata_port_printk(ap, KERN_WARNING, "irq trap\n"); | |
5689 | return 1; | |
5690 | } | |
5691 | #endif | |
5692 | return 0; /* irq not handled */ | |
5693 | } | |
5694 | ||
5695 | /** | |
5696 | * ata_interrupt - Default ATA host interrupt handler | |
5697 | * @irq: irq line (unused) | |
5698 | * @dev_instance: pointer to our ata_host information structure | |
5699 | * | |
5700 | * Default interrupt handler for PCI IDE devices. Calls | |
5701 | * ata_host_intr() for each port that is not disabled. | |
5702 | * | |
5703 | * LOCKING: | |
5704 | * Obtains host lock during operation. | |
5705 | * | |
5706 | * RETURNS: | |
5707 | * IRQ_NONE or IRQ_HANDLED. | |
5708 | */ | |
5709 | ||
5710 | irqreturn_t ata_interrupt (int irq, void *dev_instance) | |
5711 | { | |
5712 | struct ata_host *host = dev_instance; | |
5713 | unsigned int i; | |
5714 | unsigned int handled = 0; | |
5715 | unsigned long flags; | |
5716 | ||
5717 | /* TODO: make _irqsave conditional on x86 PCI IDE legacy mode */ | |
5718 | spin_lock_irqsave(&host->lock, flags); | |
5719 | ||
5720 | for (i = 0; i < host->n_ports; i++) { | |
5721 | struct ata_port *ap; | |
5722 | ||
5723 | ap = host->ports[i]; | |
5724 | if (ap && | |
5725 | !(ap->flags & ATA_FLAG_DISABLED)) { | |
5726 | struct ata_queued_cmd *qc; | |
5727 | ||
5728 | qc = ata_qc_from_tag(ap, ap->link.active_tag); | |
5729 | if (qc && (!(qc->tf.flags & ATA_TFLAG_POLLING)) && | |
5730 | (qc->flags & ATA_QCFLAG_ACTIVE)) | |
5731 | handled |= ata_host_intr(ap, qc); | |
5732 | } | |
5733 | } | |
5734 | ||
5735 | spin_unlock_irqrestore(&host->lock, flags); | |
5736 | ||
5737 | return IRQ_RETVAL(handled); | |
5738 | } | |
5739 | ||
5740 | /** | |
5741 | * sata_scr_valid - test whether SCRs are accessible | |
5742 | * @link: ATA link to test SCR accessibility for | |
5743 | * | |
5744 | * Test whether SCRs are accessible for @link. | |
5745 | * | |
5746 | * LOCKING: | |
5747 | * None. | |
5748 | * | |
5749 | * RETURNS: | |
5750 | * 1 if SCRs are accessible, 0 otherwise. | |
5751 | */ | |
5752 | int sata_scr_valid(struct ata_link *link) | |
5753 | { | |
5754 | struct ata_port *ap = link->ap; | |
5755 | ||
5756 | return (ap->flags & ATA_FLAG_SATA) && ap->ops->scr_read; | |
5757 | } | |
5758 | ||
5759 | /** | |
5760 | * sata_scr_read - read SCR register of the specified port | |
5761 | * @link: ATA link to read SCR for | |
5762 | * @reg: SCR to read | |
5763 | * @val: Place to store read value | |
5764 | * | |
5765 | * Read SCR register @reg of @link into *@val. This function is | |
5766 | * guaranteed to succeed if the cable type of the port is SATA | |
5767 | * and the port implements ->scr_read. | |
5768 | * | |
5769 | * LOCKING: | |
5770 | * None. | |
5771 | * | |
5772 | * RETURNS: | |
5773 | * 0 on success, negative errno on failure. | |
5774 | */ | |
5775 | int sata_scr_read(struct ata_link *link, int reg, u32 *val) | |
5776 | { | |
5777 | struct ata_port *ap = link->ap; | |
5778 | ||
5779 | if (sata_scr_valid(link)) | |
5780 | return ap->ops->scr_read(ap, reg, val); | |
5781 | return -EOPNOTSUPP; | |
5782 | } | |
5783 | ||
5784 | /** | |
5785 | * sata_scr_write - write SCR register of the specified port | |
5786 | * @link: ATA link to write SCR for | |
5787 | * @reg: SCR to write | |
5788 | * @val: value to write | |
5789 | * | |
5790 | * Write @val to SCR register @reg of @link. This function is | |
5791 | * guaranteed to succeed if the cable type of the port is SATA | |
5792 | * and the port implements ->scr_read. | |
5793 | * | |
5794 | * LOCKING: | |
5795 | * None. | |
5796 | * | |
5797 | * RETURNS: | |
5798 | * 0 on success, negative errno on failure. | |
5799 | */ | |
5800 | int sata_scr_write(struct ata_link *link, int reg, u32 val) | |
5801 | { | |
5802 | struct ata_port *ap = link->ap; | |
5803 | ||
5804 | if (sata_scr_valid(link)) | |
5805 | return ap->ops->scr_write(ap, reg, val); | |
5806 | return -EOPNOTSUPP; | |
5807 | } | |
5808 | ||
5809 | /** | |
5810 | * sata_scr_write_flush - write SCR register of the specified port and flush | |
5811 | * @link: ATA link to write SCR for | |
5812 | * @reg: SCR to write | |
5813 | * @val: value to write | |
5814 | * | |
5815 | * This function is identical to sata_scr_write() except that this | |
5816 | * function performs flush after writing to the register. | |
5817 | * | |
5818 | * LOCKING: | |
5819 | * None. | |
5820 | * | |
5821 | * RETURNS: | |
5822 | * 0 on success, negative errno on failure. | |
5823 | */ | |
5824 | int sata_scr_write_flush(struct ata_link *link, int reg, u32 val) | |
5825 | { | |
5826 | struct ata_port *ap = link->ap; | |
5827 | int rc; | |
5828 | ||
5829 | if (sata_scr_valid(link)) { | |
5830 | rc = ap->ops->scr_write(ap, reg, val); | |
5831 | if (rc == 0) | |
5832 | rc = ap->ops->scr_read(ap, reg, &val); | |
5833 | return rc; | |
5834 | } | |
5835 | return -EOPNOTSUPP; | |
5836 | } | |
5837 | ||
5838 | /** | |
5839 | * ata_link_online - test whether the given link is online | |
5840 | * @link: ATA link to test | |
5841 | * | |
5842 | * Test whether @link is online. Note that this function returns | |
5843 | * 0 if online status of @link cannot be obtained, so | |
5844 | * ata_link_online(link) != !ata_link_offline(link). | |
5845 | * | |
5846 | * LOCKING: | |
5847 | * None. | |
5848 | * | |
5849 | * RETURNS: | |
5850 | * 1 if the port online status is available and online. | |
5851 | */ | |
5852 | int ata_link_online(struct ata_link *link) | |
5853 | { | |
5854 | u32 sstatus; | |
5855 | ||
5856 | if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0 && | |
5857 | (sstatus & 0xf) == 0x3) | |
5858 | return 1; | |
5859 | return 0; | |
5860 | } | |
5861 | ||
5862 | /** | |
5863 | * ata_link_offline - test whether the given link is offline | |
5864 | * @link: ATA link to test | |
5865 | * | |
5866 | * Test whether @link is offline. Note that this function | |
5867 | * returns 0 if offline status of @link cannot be obtained, so | |
5868 | * ata_link_online(link) != !ata_link_offline(link). | |
5869 | * | |
5870 | * LOCKING: | |
5871 | * None. | |
5872 | * | |
5873 | * RETURNS: | |
5874 | * 1 if the port offline status is available and offline. | |
5875 | */ | |
5876 | int ata_link_offline(struct ata_link *link) | |
5877 | { | |
5878 | u32 sstatus; | |
5879 | ||
5880 | if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0 && | |
5881 | (sstatus & 0xf) != 0x3) | |
5882 | return 1; | |
5883 | return 0; | |
5884 | } | |
5885 | ||
5886 | int ata_flush_cache(struct ata_device *dev) | |
5887 | { | |
5888 | unsigned int err_mask; | |
5889 | u8 cmd; | |
5890 | ||
5891 | if (!ata_try_flush_cache(dev)) | |
5892 | return 0; | |
5893 | ||
5894 | if (dev->flags & ATA_DFLAG_FLUSH_EXT) | |
5895 | cmd = ATA_CMD_FLUSH_EXT; | |
5896 | else | |
5897 | cmd = ATA_CMD_FLUSH; | |
5898 | ||
5899 | err_mask = ata_do_simple_cmd(dev, cmd); | |
5900 | if (err_mask) { | |
5901 | ata_dev_printk(dev, KERN_ERR, "failed to flush cache\n"); | |
5902 | return -EIO; | |
5903 | } | |
5904 | ||
5905 | return 0; | |
5906 | } | |
5907 | ||
5908 | #ifdef CONFIG_PM | |
5909 | static int ata_host_request_pm(struct ata_host *host, pm_message_t mesg, | |
5910 | unsigned int action, unsigned int ehi_flags, | |
5911 | int wait) | |
5912 | { | |
5913 | unsigned long flags; | |
5914 | int i, rc; | |
5915 | ||
5916 | for (i = 0; i < host->n_ports; i++) { | |
5917 | struct ata_port *ap = host->ports[i]; | |
5918 | struct ata_link *link; | |
5919 | ||
5920 | /* Previous resume operation might still be in | |
5921 | * progress. Wait for PM_PENDING to clear. | |
5922 | */ | |
5923 | if (ap->pflags & ATA_PFLAG_PM_PENDING) { | |
5924 | ata_port_wait_eh(ap); | |
5925 | WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING); | |
5926 | } | |
5927 | ||
5928 | /* request PM ops to EH */ | |
5929 | spin_lock_irqsave(ap->lock, flags); | |
5930 | ||
5931 | ap->pm_mesg = mesg; | |
5932 | if (wait) { | |
5933 | rc = 0; | |
5934 | ap->pm_result = &rc; | |
5935 | } | |
5936 | ||
5937 | ap->pflags |= ATA_PFLAG_PM_PENDING; | |
5938 | __ata_port_for_each_link(link, ap) { | |
5939 | link->eh_info.action |= action; | |
5940 | link->eh_info.flags |= ehi_flags; | |
5941 | } | |
5942 | ||
5943 | ata_port_schedule_eh(ap); | |
5944 | ||
5945 | spin_unlock_irqrestore(ap->lock, flags); | |
5946 | ||
5947 | /* wait and check result */ | |
5948 | if (wait) { | |
5949 | ata_port_wait_eh(ap); | |
5950 | WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING); | |
5951 | if (rc) | |
5952 | return rc; | |
5953 | } | |
5954 | } | |
5955 | ||
5956 | return 0; | |
5957 | } | |
5958 | ||
5959 | /** | |
5960 | * ata_host_suspend - suspend host | |
5961 | * @host: host to suspend | |
5962 | * @mesg: PM message | |
5963 | * | |
5964 | * Suspend @host. Actual operation is performed by EH. This | |
5965 | * function requests EH to perform PM operations and waits for EH | |
5966 | * to finish. | |
5967 | * | |
5968 | * LOCKING: | |
5969 | * Kernel thread context (may sleep). | |
5970 | * | |
5971 | * RETURNS: | |
5972 | * 0 on success, -errno on failure. | |
5973 | */ | |
5974 | int ata_host_suspend(struct ata_host *host, pm_message_t mesg) | |
5975 | { | |
5976 | int rc; | |
5977 | ||
5978 | rc = ata_host_request_pm(host, mesg, 0, ATA_EHI_QUIET, 1); | |
5979 | if (rc == 0) | |
5980 | host->dev->power.power_state = mesg; | |
5981 | return rc; | |
5982 | } | |
5983 | ||
5984 | /** | |
5985 | * ata_host_resume - resume host | |
5986 | * @host: host to resume | |
5987 | * | |
5988 | * Resume @host. Actual operation is performed by EH. This | |
5989 | * function requests EH to perform PM operations and returns. | |
5990 | * Note that all resume operations are performed parallely. | |
5991 | * | |
5992 | * LOCKING: | |
5993 | * Kernel thread context (may sleep). | |
5994 | */ | |
5995 | void ata_host_resume(struct ata_host *host) | |
5996 | { | |
5997 | ata_host_request_pm(host, PMSG_ON, ATA_EH_SOFTRESET, | |
5998 | ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET, 0); | |
5999 | host->dev->power.power_state = PMSG_ON; | |
6000 | } | |
6001 | #endif | |
6002 | ||
6003 | /** | |
6004 | * ata_port_start - Set port up for dma. | |
6005 | * @ap: Port to initialize | |
6006 | * | |
6007 | * Called just after data structures for each port are | |
6008 | * initialized. Allocates space for PRD table. | |
6009 | * | |
6010 | * May be used as the port_start() entry in ata_port_operations. | |
6011 | * | |
6012 | * LOCKING: | |
6013 | * Inherited from caller. | |
6014 | */ | |
6015 | int ata_port_start(struct ata_port *ap) | |
6016 | { | |
6017 | struct device *dev = ap->dev; | |
6018 | int rc; | |
6019 | ||
6020 | ap->prd = dmam_alloc_coherent(dev, ATA_PRD_TBL_SZ, &ap->prd_dma, | |
6021 | GFP_KERNEL); | |
6022 | if (!ap->prd) | |
6023 | return -ENOMEM; | |
6024 | ||
6025 | rc = ata_pad_alloc(ap, dev); | |
6026 | if (rc) | |
6027 | return rc; | |
6028 | ||
6029 | DPRINTK("prd alloc, virt %p, dma %llx\n", ap->prd, | |
6030 | (unsigned long long)ap->prd_dma); | |
6031 | return 0; | |
6032 | } | |
6033 | ||
6034 | /** | |
6035 | * ata_dev_init - Initialize an ata_device structure | |
6036 | * @dev: Device structure to initialize | |
6037 | * | |
6038 | * Initialize @dev in preparation for probing. | |
6039 | * | |
6040 | * LOCKING: | |
6041 | * Inherited from caller. | |
6042 | */ | |
6043 | void ata_dev_init(struct ata_device *dev) | |
6044 | { | |
6045 | struct ata_link *link = dev->link; | |
6046 | struct ata_port *ap = link->ap; | |
6047 | unsigned long flags; | |
6048 | ||
6049 | /* SATA spd limit is bound to the first device */ | |
6050 | link->sata_spd_limit = link->hw_sata_spd_limit; | |
6051 | link->sata_spd = 0; | |
6052 | ||
6053 | /* High bits of dev->flags are used to record warm plug | |
6054 | * requests which occur asynchronously. Synchronize using | |
6055 | * host lock. | |
6056 | */ | |
6057 | spin_lock_irqsave(ap->lock, flags); | |
6058 | dev->flags &= ~ATA_DFLAG_INIT_MASK; | |
6059 | dev->horkage = 0; | |
6060 | spin_unlock_irqrestore(ap->lock, flags); | |
6061 | ||
6062 | memset((void *)dev + ATA_DEVICE_CLEAR_OFFSET, 0, | |
6063 | sizeof(*dev) - ATA_DEVICE_CLEAR_OFFSET); | |
6064 | dev->pio_mask = UINT_MAX; | |
6065 | dev->mwdma_mask = UINT_MAX; | |
6066 | dev->udma_mask = UINT_MAX; | |
6067 | } | |
6068 | ||
6069 | /** | |
6070 | * ata_link_init - Initialize an ata_link structure | |
6071 | * @ap: ATA port link is attached to | |
6072 | * @link: Link structure to initialize | |
6073 | * @pmp: Port multiplier port number | |
6074 | * | |
6075 | * Initialize @link. | |
6076 | * | |
6077 | * LOCKING: | |
6078 | * Kernel thread context (may sleep) | |
6079 | */ | |
6080 | static void ata_link_init(struct ata_port *ap, struct ata_link *link, int pmp) | |
6081 | { | |
6082 | int i; | |
6083 | ||
6084 | /* clear everything except for devices */ | |
6085 | memset(link, 0, offsetof(struct ata_link, device[0])); | |
6086 | ||
6087 | link->ap = ap; | |
6088 | link->pmp = pmp; | |
6089 | link->active_tag = ATA_TAG_POISON; | |
6090 | link->hw_sata_spd_limit = UINT_MAX; | |
6091 | ||
6092 | /* can't use iterator, ap isn't initialized yet */ | |
6093 | for (i = 0; i < ATA_MAX_DEVICES; i++) { | |
6094 | struct ata_device *dev = &link->device[i]; | |
6095 | ||
6096 | dev->link = link; | |
6097 | dev->devno = dev - link->device; | |
6098 | ata_dev_init(dev); | |
6099 | } | |
6100 | } | |
6101 | ||
6102 | /** | |
6103 | * sata_link_init_spd - Initialize link->sata_spd_limit | |
6104 | * @link: Link to configure sata_spd_limit for | |
6105 | * | |
6106 | * Initialize @link->[hw_]sata_spd_limit to the currently | |
6107 | * configured value. | |
6108 | * | |
6109 | * LOCKING: | |
6110 | * Kernel thread context (may sleep). | |
6111 | * | |
6112 | * RETURNS: | |
6113 | * 0 on success, -errno on failure. | |
6114 | */ | |
6115 | static int sata_link_init_spd(struct ata_link *link) | |
6116 | { | |
6117 | u32 scontrol, spd; | |
6118 | int rc; | |
6119 | ||
6120 | rc = sata_scr_read(link, SCR_CONTROL, &scontrol); | |
6121 | if (rc) | |
6122 | return rc; | |
6123 | ||
6124 | spd = (scontrol >> 4) & 0xf; | |
6125 | if (spd) | |
6126 | link->hw_sata_spd_limit &= (1 << spd) - 1; | |
6127 | ||
6128 | link->sata_spd_limit = link->hw_sata_spd_limit; | |
6129 | ||
6130 | return 0; | |
6131 | } | |
6132 | ||
6133 | /** | |
6134 | * ata_port_alloc - allocate and initialize basic ATA port resources | |
6135 | * @host: ATA host this allocated port belongs to | |
6136 | * | |
6137 | * Allocate and initialize basic ATA port resources. | |
6138 | * | |
6139 | * RETURNS: | |
6140 | * Allocate ATA port on success, NULL on failure. | |
6141 | * | |
6142 | * LOCKING: | |
6143 | * Inherited from calling layer (may sleep). | |
6144 | */ | |
6145 | struct ata_port *ata_port_alloc(struct ata_host *host) | |
6146 | { | |
6147 | struct ata_port *ap; | |
6148 | ||
6149 | DPRINTK("ENTER\n"); | |
6150 | ||
6151 | ap = kzalloc(sizeof(*ap), GFP_KERNEL); | |
6152 | if (!ap) | |
6153 | return NULL; | |
6154 | ||
6155 | ap->pflags |= ATA_PFLAG_INITIALIZING; | |
6156 | ap->lock = &host->lock; | |
6157 | ap->flags = ATA_FLAG_DISABLED; | |
6158 | ap->print_id = -1; | |
6159 | ap->ctl = ATA_DEVCTL_OBS; | |
6160 | ap->host = host; | |
6161 | ap->dev = host->dev; | |
6162 | ap->last_ctl = 0xFF; | |
6163 | ||
6164 | #if defined(ATA_VERBOSE_DEBUG) | |
6165 | /* turn on all debugging levels */ | |
6166 | ap->msg_enable = 0x00FF; | |
6167 | #elif defined(ATA_DEBUG) | |
6168 | ap->msg_enable = ATA_MSG_DRV | ATA_MSG_INFO | ATA_MSG_CTL | ATA_MSG_WARN | ATA_MSG_ERR; | |
6169 | #else | |
6170 | ap->msg_enable = ATA_MSG_DRV | ATA_MSG_ERR | ATA_MSG_WARN; | |
6171 | #endif | |
6172 | ||
6173 | INIT_DELAYED_WORK(&ap->port_task, NULL); | |
6174 | INIT_DELAYED_WORK(&ap->hotplug_task, ata_scsi_hotplug); | |
6175 | INIT_WORK(&ap->scsi_rescan_task, ata_scsi_dev_rescan); | |
6176 | INIT_LIST_HEAD(&ap->eh_done_q); | |
6177 | init_waitqueue_head(&ap->eh_wait_q); | |
6178 | init_timer_deferrable(&ap->fastdrain_timer); | |
6179 | ap->fastdrain_timer.function = ata_eh_fastdrain_timerfn; | |
6180 | ap->fastdrain_timer.data = (unsigned long)ap; | |
6181 | ||
6182 | ap->cbl = ATA_CBL_NONE; | |
6183 | ||
6184 | ata_link_init(ap, &ap->link, 0); | |
6185 | ||
6186 | #ifdef ATA_IRQ_TRAP | |
6187 | ap->stats.unhandled_irq = 1; | |
6188 | ap->stats.idle_irq = 1; | |
6189 | #endif | |
6190 | return ap; | |
6191 | } | |
6192 | ||
6193 | static void ata_host_release(struct device *gendev, void *res) | |
6194 | { | |
6195 | struct ata_host *host = dev_get_drvdata(gendev); | |
6196 | int i; | |
6197 | ||
6198 | for (i = 0; i < host->n_ports; i++) { | |
6199 | struct ata_port *ap = host->ports[i]; | |
6200 | ||
6201 | if (!ap) | |
6202 | continue; | |
6203 | ||
6204 | if ((host->flags & ATA_HOST_STARTED) && ap->ops->port_stop) | |
6205 | ap->ops->port_stop(ap); | |
6206 | } | |
6207 | ||
6208 | if ((host->flags & ATA_HOST_STARTED) && host->ops->host_stop) | |
6209 | host->ops->host_stop(host); | |
6210 | ||
6211 | for (i = 0; i < host->n_ports; i++) { | |
6212 | struct ata_port *ap = host->ports[i]; | |
6213 | ||
6214 | if (!ap) | |
6215 | continue; | |
6216 | ||
6217 | if (ap->scsi_host) | |
6218 | scsi_host_put(ap->scsi_host); | |
6219 | ||
6220 | kfree(ap); | |
6221 | host->ports[i] = NULL; | |
6222 | } | |
6223 | ||
6224 | dev_set_drvdata(gendev, NULL); | |
6225 | } | |
6226 | ||
6227 | /** | |
6228 | * ata_host_alloc - allocate and init basic ATA host resources | |
6229 | * @dev: generic device this host is associated with | |
6230 | * @max_ports: maximum number of ATA ports associated with this host | |
6231 | * | |
6232 | * Allocate and initialize basic ATA host resources. LLD calls | |
6233 | * this function to allocate a host, initializes it fully and | |
6234 | * attaches it using ata_host_register(). | |
6235 | * | |
6236 | * @max_ports ports are allocated and host->n_ports is | |
6237 | * initialized to @max_ports. The caller is allowed to decrease | |
6238 | * host->n_ports before calling ata_host_register(). The unused | |
6239 | * ports will be automatically freed on registration. | |
6240 | * | |
6241 | * RETURNS: | |
6242 | * Allocate ATA host on success, NULL on failure. | |
6243 | * | |
6244 | * LOCKING: | |
6245 | * Inherited from calling layer (may sleep). | |
6246 | */ | |
6247 | struct ata_host *ata_host_alloc(struct device *dev, int max_ports) | |
6248 | { | |
6249 | struct ata_host *host; | |
6250 | size_t sz; | |
6251 | int i; | |
6252 | ||
6253 | DPRINTK("ENTER\n"); | |
6254 | ||
6255 | if (!devres_open_group(dev, NULL, GFP_KERNEL)) | |
6256 | return NULL; | |
6257 | ||
6258 | /* alloc a container for our list of ATA ports (buses) */ | |
6259 | sz = sizeof(struct ata_host) + (max_ports + 1) * sizeof(void *); | |
6260 | /* alloc a container for our list of ATA ports (buses) */ | |
6261 | host = devres_alloc(ata_host_release, sz, GFP_KERNEL); | |
6262 | if (!host) | |
6263 | goto err_out; | |
6264 | ||
6265 | devres_add(dev, host); | |
6266 | dev_set_drvdata(dev, host); | |
6267 | ||
6268 | spin_lock_init(&host->lock); | |
6269 | host->dev = dev; | |
6270 | host->n_ports = max_ports; | |
6271 | ||
6272 | /* allocate ports bound to this host */ | |
6273 | for (i = 0; i < max_ports; i++) { | |
6274 | struct ata_port *ap; | |
6275 | ||
6276 | ap = ata_port_alloc(host); | |
6277 | if (!ap) | |
6278 | goto err_out; | |
6279 | ||
6280 | ap->port_no = i; | |
6281 | host->ports[i] = ap; | |
6282 | } | |
6283 | ||
6284 | devres_remove_group(dev, NULL); | |
6285 | return host; | |
6286 | ||
6287 | err_out: | |
6288 | devres_release_group(dev, NULL); | |
6289 | return NULL; | |
6290 | } | |
6291 | ||
6292 | /** | |
6293 | * ata_host_alloc_pinfo - alloc host and init with port_info array | |
6294 | * @dev: generic device this host is associated with | |
6295 | * @ppi: array of ATA port_info to initialize host with | |
6296 | * @n_ports: number of ATA ports attached to this host | |
6297 | * | |
6298 | * Allocate ATA host and initialize with info from @ppi. If NULL | |
6299 | * terminated, @ppi may contain fewer entries than @n_ports. The | |
6300 | * last entry will be used for the remaining ports. | |
6301 | * | |
6302 | * RETURNS: | |
6303 | * Allocate ATA host on success, NULL on failure. | |
6304 | * | |
6305 | * LOCKING: | |
6306 | * Inherited from calling layer (may sleep). | |
6307 | */ | |
6308 | struct ata_host *ata_host_alloc_pinfo(struct device *dev, | |
6309 | const struct ata_port_info * const * ppi, | |
6310 | int n_ports) | |
6311 | { | |
6312 | const struct ata_port_info *pi; | |
6313 | struct ata_host *host; | |
6314 | int i, j; | |
6315 | ||
6316 | host = ata_host_alloc(dev, n_ports); | |
6317 | if (!host) | |
6318 | return NULL; | |
6319 | ||
6320 | for (i = 0, j = 0, pi = NULL; i < host->n_ports; i++) { | |
6321 | struct ata_port *ap = host->ports[i]; | |
6322 | ||
6323 | if (ppi[j]) | |
6324 | pi = ppi[j++]; | |
6325 | ||
6326 | ap->pio_mask = pi->pio_mask; | |
6327 | ap->mwdma_mask = pi->mwdma_mask; | |
6328 | ap->udma_mask = pi->udma_mask; | |
6329 | ap->flags |= pi->flags; | |
6330 | ap->link.flags |= pi->link_flags; | |
6331 | ap->ops = pi->port_ops; | |
6332 | ||
6333 | if (!host->ops && (pi->port_ops != &ata_dummy_port_ops)) | |
6334 | host->ops = pi->port_ops; | |
6335 | if (!host->private_data && pi->private_data) | |
6336 | host->private_data = pi->private_data; | |
6337 | } | |
6338 | ||
6339 | return host; | |
6340 | } | |
6341 | ||
6342 | /** | |
6343 | * ata_host_start - start and freeze ports of an ATA host | |
6344 | * @host: ATA host to start ports for | |
6345 | * | |
6346 | * Start and then freeze ports of @host. Started status is | |
6347 | * recorded in host->flags, so this function can be called | |
6348 | * multiple times. Ports are guaranteed to get started only | |
6349 | * once. If host->ops isn't initialized yet, its set to the | |
6350 | * first non-dummy port ops. | |
6351 | * | |
6352 | * LOCKING: | |
6353 | * Inherited from calling layer (may sleep). | |
6354 | * | |
6355 | * RETURNS: | |
6356 | * 0 if all ports are started successfully, -errno otherwise. | |
6357 | */ | |
6358 | int ata_host_start(struct ata_host *host) | |
6359 | { | |
6360 | int i, rc; | |
6361 | ||
6362 | if (host->flags & ATA_HOST_STARTED) | |
6363 | return 0; | |
6364 | ||
6365 | for (i = 0; i < host->n_ports; i++) { | |
6366 | struct ata_port *ap = host->ports[i]; | |
6367 | ||
6368 | if (!host->ops && !ata_port_is_dummy(ap)) | |
6369 | host->ops = ap->ops; | |
6370 | ||
6371 | if (ap->ops->port_start) { | |
6372 | rc = ap->ops->port_start(ap); | |
6373 | if (rc) { | |
6374 | ata_port_printk(ap, KERN_ERR, "failed to " | |
6375 | "start port (errno=%d)\n", rc); | |
6376 | goto err_out; | |
6377 | } | |
6378 | } | |
6379 | ||
6380 | ata_eh_freeze_port(ap); | |
6381 | } | |
6382 | ||
6383 | host->flags |= ATA_HOST_STARTED; | |
6384 | return 0; | |
6385 | ||
6386 | err_out: | |
6387 | while (--i >= 0) { | |
6388 | struct ata_port *ap = host->ports[i]; | |
6389 | ||
6390 | if (ap->ops->port_stop) | |
6391 | ap->ops->port_stop(ap); | |
6392 | } | |
6393 | return rc; | |
6394 | } | |
6395 | ||
6396 | /** | |
6397 | * ata_sas_host_init - Initialize a host struct | |
6398 | * @host: host to initialize | |
6399 | * @dev: device host is attached to | |
6400 | * @flags: host flags | |
6401 | * @ops: port_ops | |
6402 | * | |
6403 | * LOCKING: | |
6404 | * PCI/etc. bus probe sem. | |
6405 | * | |
6406 | */ | |
6407 | /* KILLME - the only user left is ipr */ | |
6408 | void ata_host_init(struct ata_host *host, struct device *dev, | |
6409 | unsigned long flags, const struct ata_port_operations *ops) | |
6410 | { | |
6411 | spin_lock_init(&host->lock); | |
6412 | host->dev = dev; | |
6413 | host->flags = flags; | |
6414 | host->ops = ops; | |
6415 | } | |
6416 | ||
6417 | /** | |
6418 | * ata_host_register - register initialized ATA host | |
6419 | * @host: ATA host to register | |
6420 | * @sht: template for SCSI host | |
6421 | * | |
6422 | * Register initialized ATA host. @host is allocated using | |
6423 | * ata_host_alloc() and fully initialized by LLD. This function | |
6424 | * starts ports, registers @host with ATA and SCSI layers and | |
6425 | * probe registered devices. | |
6426 | * | |
6427 | * LOCKING: | |
6428 | * Inherited from calling layer (may sleep). | |
6429 | * | |
6430 | * RETURNS: | |
6431 | * 0 on success, -errno otherwise. | |
6432 | */ | |
6433 | int ata_host_register(struct ata_host *host, struct scsi_host_template *sht) | |
6434 | { | |
6435 | int i, rc; | |
6436 | ||
6437 | /* host must have been started */ | |
6438 | if (!(host->flags & ATA_HOST_STARTED)) { | |
6439 | dev_printk(KERN_ERR, host->dev, | |
6440 | "BUG: trying to register unstarted host\n"); | |
6441 | WARN_ON(1); | |
6442 | return -EINVAL; | |
6443 | } | |
6444 | ||
6445 | /* Blow away unused ports. This happens when LLD can't | |
6446 | * determine the exact number of ports to allocate at | |
6447 | * allocation time. | |
6448 | */ | |
6449 | for (i = host->n_ports; host->ports[i]; i++) | |
6450 | kfree(host->ports[i]); | |
6451 | ||
6452 | /* give ports names and add SCSI hosts */ | |
6453 | for (i = 0; i < host->n_ports; i++) | |
6454 | host->ports[i]->print_id = ata_print_id++; | |
6455 | ||
6456 | rc = ata_scsi_add_hosts(host, sht); | |
6457 | if (rc) | |
6458 | return rc; | |
6459 | ||
6460 | /* associate with ACPI nodes */ | |
6461 | ata_acpi_associate(host); | |
6462 | ||
6463 | /* set cable, sata_spd_limit and report */ | |
6464 | for (i = 0; i < host->n_ports; i++) { | |
6465 | struct ata_port *ap = host->ports[i]; | |
6466 | int irq_line; | |
6467 | unsigned long xfer_mask; | |
6468 | ||
6469 | /* set SATA cable type if still unset */ | |
6470 | if (ap->cbl == ATA_CBL_NONE && (ap->flags & ATA_FLAG_SATA)) | |
6471 | ap->cbl = ATA_CBL_SATA; | |
6472 | ||
6473 | /* init sata_spd_limit to the current value */ | |
6474 | sata_link_init_spd(&ap->link); | |
6475 | ||
6476 | /* report the secondary IRQ for second channel legacy */ | |
6477 | irq_line = host->irq; | |
6478 | if (i == 1 && host->irq2) | |
6479 | irq_line = host->irq2; | |
6480 | ||
6481 | xfer_mask = ata_pack_xfermask(ap->pio_mask, ap->mwdma_mask, | |
6482 | ap->udma_mask); | |
6483 | ||
6484 | /* print per-port info to dmesg */ | |
6485 | if (!ata_port_is_dummy(ap)) | |
6486 | ata_port_printk(ap, KERN_INFO, "%cATA max %s cmd 0x%p " | |
6487 | "ctl 0x%p bmdma 0x%p irq %d\n", | |
6488 | (ap->flags & ATA_FLAG_SATA) ? 'S' : 'P', | |
6489 | ata_mode_string(xfer_mask), | |
6490 | ap->ioaddr.cmd_addr, | |
6491 | ap->ioaddr.ctl_addr, | |
6492 | ap->ioaddr.bmdma_addr, | |
6493 | irq_line); | |
6494 | else | |
6495 | ata_port_printk(ap, KERN_INFO, "DUMMY\n"); | |
6496 | } | |
6497 | ||
6498 | /* perform each probe synchronously */ | |
6499 | DPRINTK("probe begin\n"); | |
6500 | for (i = 0; i < host->n_ports; i++) { | |
6501 | struct ata_port *ap = host->ports[i]; | |
6502 | int rc; | |
6503 | ||
6504 | /* probe */ | |
6505 | if (ap->ops->error_handler) { | |
6506 | struct ata_eh_info *ehi = &ap->link.eh_info; | |
6507 | unsigned long flags; | |
6508 | ||
6509 | ata_port_probe(ap); | |
6510 | ||
6511 | /* kick EH for boot probing */ | |
6512 | spin_lock_irqsave(ap->lock, flags); | |
6513 | ||
6514 | ehi->probe_mask = | |
6515 | (1 << ata_link_max_devices(&ap->link)) - 1; | |
6516 | ehi->action |= ATA_EH_SOFTRESET; | |
6517 | ehi->flags |= ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET; | |
6518 | ||
6519 | ap->pflags &= ~ATA_PFLAG_INITIALIZING; | |
6520 | ap->pflags |= ATA_PFLAG_LOADING; | |
6521 | ata_port_schedule_eh(ap); | |
6522 | ||
6523 | spin_unlock_irqrestore(ap->lock, flags); | |
6524 | ||
6525 | /* wait for EH to finish */ | |
6526 | ata_port_wait_eh(ap); | |
6527 | } else { | |
6528 | DPRINTK("ata%u: bus probe begin\n", ap->print_id); | |
6529 | rc = ata_bus_probe(ap); | |
6530 | DPRINTK("ata%u: bus probe end\n", ap->print_id); | |
6531 | ||
6532 | if (rc) { | |
6533 | /* FIXME: do something useful here? | |
6534 | * Current libata behavior will | |
6535 | * tear down everything when | |
6536 | * the module is removed | |
6537 | * or the h/w is unplugged. | |
6538 | */ | |
6539 | } | |
6540 | } | |
6541 | } | |
6542 | ||
6543 | /* probes are done, now scan each port's disk(s) */ | |
6544 | DPRINTK("host probe begin\n"); | |
6545 | for (i = 0; i < host->n_ports; i++) { | |
6546 | struct ata_port *ap = host->ports[i]; | |
6547 | ||
6548 | ata_scsi_scan_host(ap, 1); | |
6549 | } | |
6550 | ||
6551 | return 0; | |
6552 | } | |
6553 | ||
6554 | /** | |
6555 | * ata_host_activate - start host, request IRQ and register it | |
6556 | * @host: target ATA host | |
6557 | * @irq: IRQ to request | |
6558 | * @irq_handler: irq_handler used when requesting IRQ | |
6559 | * @irq_flags: irq_flags used when requesting IRQ | |
6560 | * @sht: scsi_host_template to use when registering the host | |
6561 | * | |
6562 | * After allocating an ATA host and initializing it, most libata | |
6563 | * LLDs perform three steps to activate the host - start host, | |
6564 | * request IRQ and register it. This helper takes necessasry | |
6565 | * arguments and performs the three steps in one go. | |
6566 | * | |
6567 | * LOCKING: | |
6568 | * Inherited from calling layer (may sleep). | |
6569 | * | |
6570 | * RETURNS: | |
6571 | * 0 on success, -errno otherwise. | |
6572 | */ | |
6573 | int ata_host_activate(struct ata_host *host, int irq, | |
6574 | irq_handler_t irq_handler, unsigned long irq_flags, | |
6575 | struct scsi_host_template *sht) | |
6576 | { | |
6577 | int rc; | |
6578 | ||
6579 | rc = ata_host_start(host); | |
6580 | if (rc) | |
6581 | return rc; | |
6582 | ||
6583 | rc = devm_request_irq(host->dev, irq, irq_handler, irq_flags, | |
6584 | dev_driver_string(host->dev), host); | |
6585 | if (rc) | |
6586 | return rc; | |
6587 | ||
6588 | /* Used to print device info at probe */ | |
6589 | host->irq = irq; | |
6590 | ||
6591 | rc = ata_host_register(host, sht); | |
6592 | /* if failed, just free the IRQ and leave ports alone */ | |
6593 | if (rc) | |
6594 | devm_free_irq(host->dev, irq, host); | |
6595 | ||
6596 | return rc; | |
6597 | } | |
6598 | ||
6599 | /** | |
6600 | * ata_port_detach - Detach ATA port in prepration of device removal | |
6601 | * @ap: ATA port to be detached | |
6602 | * | |
6603 | * Detach all ATA devices and the associated SCSI devices of @ap; | |
6604 | * then, remove the associated SCSI host. @ap is guaranteed to | |
6605 | * be quiescent on return from this function. | |
6606 | * | |
6607 | * LOCKING: | |
6608 | * Kernel thread context (may sleep). | |
6609 | */ | |
6610 | void ata_port_detach(struct ata_port *ap) | |
6611 | { | |
6612 | unsigned long flags; | |
6613 | struct ata_link *link; | |
6614 | struct ata_device *dev; | |
6615 | ||
6616 | if (!ap->ops->error_handler) | |
6617 | goto skip_eh; | |
6618 | ||
6619 | /* tell EH we're leaving & flush EH */ | |
6620 | spin_lock_irqsave(ap->lock, flags); | |
6621 | ap->pflags |= ATA_PFLAG_UNLOADING; | |
6622 | spin_unlock_irqrestore(ap->lock, flags); | |
6623 | ||
6624 | ata_port_wait_eh(ap); | |
6625 | ||
6626 | /* EH is now guaranteed to see UNLOADING, so no new device | |
6627 | * will be attached. Disable all existing devices. | |
6628 | */ | |
6629 | spin_lock_irqsave(ap->lock, flags); | |
6630 | ||
6631 | ata_port_for_each_link(link, ap) { | |
6632 | ata_link_for_each_dev(dev, link) | |
6633 | ata_dev_disable(dev); | |
6634 | } | |
6635 | ||
6636 | spin_unlock_irqrestore(ap->lock, flags); | |
6637 | ||
6638 | /* Final freeze & EH. All in-flight commands are aborted. EH | |
6639 | * will be skipped and retrials will be terminated with bad | |
6640 | * target. | |
6641 | */ | |
6642 | spin_lock_irqsave(ap->lock, flags); | |
6643 | ata_port_freeze(ap); /* won't be thawed */ | |
6644 | spin_unlock_irqrestore(ap->lock, flags); | |
6645 | ||
6646 | ata_port_wait_eh(ap); | |
6647 | cancel_rearming_delayed_work(&ap->hotplug_task); | |
6648 | ||
6649 | skip_eh: | |
6650 | /* remove the associated SCSI host */ | |
6651 | scsi_remove_host(ap->scsi_host); | |
6652 | } | |
6653 | ||
6654 | /** | |
6655 | * ata_host_detach - Detach all ports of an ATA host | |
6656 | * @host: Host to detach | |
6657 | * | |
6658 | * Detach all ports of @host. | |
6659 | * | |
6660 | * LOCKING: | |
6661 | * Kernel thread context (may sleep). | |
6662 | */ | |
6663 | void ata_host_detach(struct ata_host *host) | |
6664 | { | |
6665 | int i; | |
6666 | ||
6667 | for (i = 0; i < host->n_ports; i++) | |
6668 | ata_port_detach(host->ports[i]); | |
6669 | } | |
6670 | ||
6671 | /** | |
6672 | * ata_std_ports - initialize ioaddr with standard port offsets. | |
6673 | * @ioaddr: IO address structure to be initialized | |
6674 | * | |
6675 | * Utility function which initializes data_addr, error_addr, | |
6676 | * feature_addr, nsect_addr, lbal_addr, lbam_addr, lbah_addr, | |
6677 | * device_addr, status_addr, and command_addr to standard offsets | |
6678 | * relative to cmd_addr. | |
6679 | * | |
6680 | * Does not set ctl_addr, altstatus_addr, bmdma_addr, or scr_addr. | |
6681 | */ | |
6682 | ||
6683 | void ata_std_ports(struct ata_ioports *ioaddr) | |
6684 | { | |
6685 | ioaddr->data_addr = ioaddr->cmd_addr + ATA_REG_DATA; | |
6686 | ioaddr->error_addr = ioaddr->cmd_addr + ATA_REG_ERR; | |
6687 | ioaddr->feature_addr = ioaddr->cmd_addr + ATA_REG_FEATURE; | |
6688 | ioaddr->nsect_addr = ioaddr->cmd_addr + ATA_REG_NSECT; | |
6689 | ioaddr->lbal_addr = ioaddr->cmd_addr + ATA_REG_LBAL; | |
6690 | ioaddr->lbam_addr = ioaddr->cmd_addr + ATA_REG_LBAM; | |
6691 | ioaddr->lbah_addr = ioaddr->cmd_addr + ATA_REG_LBAH; | |
6692 | ioaddr->device_addr = ioaddr->cmd_addr + ATA_REG_DEVICE; | |
6693 | ioaddr->status_addr = ioaddr->cmd_addr + ATA_REG_STATUS; | |
6694 | ioaddr->command_addr = ioaddr->cmd_addr + ATA_REG_CMD; | |
6695 | } | |
6696 | ||
6697 | ||
6698 | #ifdef CONFIG_PCI | |
6699 | ||
6700 | /** | |
6701 | * ata_pci_remove_one - PCI layer callback for device removal | |
6702 | * @pdev: PCI device that was removed | |
6703 | * | |
6704 | * PCI layer indicates to libata via this hook that hot-unplug or | |
6705 | * module unload event has occurred. Detach all ports. Resource | |
6706 | * release is handled via devres. | |
6707 | * | |
6708 | * LOCKING: | |
6709 | * Inherited from PCI layer (may sleep). | |
6710 | */ | |
6711 | void ata_pci_remove_one(struct pci_dev *pdev) | |
6712 | { | |
6713 | struct device *dev = pci_dev_to_dev(pdev); | |
6714 | struct ata_host *host = dev_get_drvdata(dev); | |
6715 | ||
6716 | ata_host_detach(host); | |
6717 | } | |
6718 | ||
6719 | /* move to PCI subsystem */ | |
6720 | int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits) | |
6721 | { | |
6722 | unsigned long tmp = 0; | |
6723 | ||
6724 | switch (bits->width) { | |
6725 | case 1: { | |
6726 | u8 tmp8 = 0; | |
6727 | pci_read_config_byte(pdev, bits->reg, &tmp8); | |
6728 | tmp = tmp8; | |
6729 | break; | |
6730 | } | |
6731 | case 2: { | |
6732 | u16 tmp16 = 0; | |
6733 | pci_read_config_word(pdev, bits->reg, &tmp16); | |
6734 | tmp = tmp16; | |
6735 | break; | |
6736 | } | |
6737 | case 4: { | |
6738 | u32 tmp32 = 0; | |
6739 | pci_read_config_dword(pdev, bits->reg, &tmp32); | |
6740 | tmp = tmp32; | |
6741 | break; | |
6742 | } | |
6743 | ||
6744 | default: | |
6745 | return -EINVAL; | |
6746 | } | |
6747 | ||
6748 | tmp &= bits->mask; | |
6749 | ||
6750 | return (tmp == bits->val) ? 1 : 0; | |
6751 | } | |
6752 | ||
6753 | #ifdef CONFIG_PM | |
6754 | void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg) | |
6755 | { | |
6756 | pci_save_state(pdev); | |
6757 | pci_disable_device(pdev); | |
6758 | ||
6759 | if (mesg.event == PM_EVENT_SUSPEND) | |
6760 | pci_set_power_state(pdev, PCI_D3hot); | |
6761 | } | |
6762 | ||
6763 | int ata_pci_device_do_resume(struct pci_dev *pdev) | |
6764 | { | |
6765 | int rc; | |
6766 | ||
6767 | pci_set_power_state(pdev, PCI_D0); | |
6768 | pci_restore_state(pdev); | |
6769 | ||
6770 | rc = pcim_enable_device(pdev); | |
6771 | if (rc) { | |
6772 | dev_printk(KERN_ERR, &pdev->dev, | |
6773 | "failed to enable device after resume (%d)\n", rc); | |
6774 | return rc; | |
6775 | } | |
6776 | ||
6777 | pci_set_master(pdev); | |
6778 | return 0; | |
6779 | } | |
6780 | ||
6781 | int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg) | |
6782 | { | |
6783 | struct ata_host *host = dev_get_drvdata(&pdev->dev); | |
6784 | int rc = 0; | |
6785 | ||
6786 | rc = ata_host_suspend(host, mesg); | |
6787 | if (rc) | |
6788 | return rc; | |
6789 | ||
6790 | ata_pci_device_do_suspend(pdev, mesg); | |
6791 | ||
6792 | return 0; | |
6793 | } | |
6794 | ||
6795 | int ata_pci_device_resume(struct pci_dev *pdev) | |
6796 | { | |
6797 | struct ata_host *host = dev_get_drvdata(&pdev->dev); | |
6798 | int rc; | |
6799 | ||
6800 | rc = ata_pci_device_do_resume(pdev); | |
6801 | if (rc == 0) | |
6802 | ata_host_resume(host); | |
6803 | return rc; | |
6804 | } | |
6805 | #endif /* CONFIG_PM */ | |
6806 | ||
6807 | #endif /* CONFIG_PCI */ | |
6808 | ||
6809 | ||
6810 | static int __init ata_init(void) | |
6811 | { | |
6812 | ata_probe_timeout *= HZ; | |
6813 | ata_wq = create_workqueue("ata"); | |
6814 | if (!ata_wq) | |
6815 | return -ENOMEM; | |
6816 | ||
6817 | ata_aux_wq = create_singlethread_workqueue("ata_aux"); | |
6818 | if (!ata_aux_wq) { | |
6819 | destroy_workqueue(ata_wq); | |
6820 | return -ENOMEM; | |
6821 | } | |
6822 | ||
6823 | printk(KERN_DEBUG "libata version " DRV_VERSION " loaded.\n"); | |
6824 | return 0; | |
6825 | } | |
6826 | ||
6827 | static void __exit ata_exit(void) | |
6828 | { | |
6829 | destroy_workqueue(ata_wq); | |
6830 | destroy_workqueue(ata_aux_wq); | |
6831 | } | |
6832 | ||
6833 | subsys_initcall(ata_init); | |
6834 | module_exit(ata_exit); | |
6835 | ||
6836 | static unsigned long ratelimit_time; | |
6837 | static DEFINE_SPINLOCK(ata_ratelimit_lock); | |
6838 | ||
6839 | int ata_ratelimit(void) | |
6840 | { | |
6841 | int rc; | |
6842 | unsigned long flags; | |
6843 | ||
6844 | spin_lock_irqsave(&ata_ratelimit_lock, flags); | |
6845 | ||
6846 | if (time_after(jiffies, ratelimit_time)) { | |
6847 | rc = 1; | |
6848 | ratelimit_time = jiffies + (HZ/5); | |
6849 | } else | |
6850 | rc = 0; | |
6851 | ||
6852 | spin_unlock_irqrestore(&ata_ratelimit_lock, flags); | |
6853 | ||
6854 | return rc; | |
6855 | } | |
6856 | ||
6857 | /** | |
6858 | * ata_wait_register - wait until register value changes | |
6859 | * @reg: IO-mapped register | |
6860 | * @mask: Mask to apply to read register value | |
6861 | * @val: Wait condition | |
6862 | * @interval_msec: polling interval in milliseconds | |
6863 | * @timeout_msec: timeout in milliseconds | |
6864 | * | |
6865 | * Waiting for some bits of register to change is a common | |
6866 | * operation for ATA controllers. This function reads 32bit LE | |
6867 | * IO-mapped register @reg and tests for the following condition. | |
6868 | * | |
6869 | * (*@reg & mask) != val | |
6870 | * | |
6871 | * If the condition is met, it returns; otherwise, the process is | |
6872 | * repeated after @interval_msec until timeout. | |
6873 | * | |
6874 | * LOCKING: | |
6875 | * Kernel thread context (may sleep) | |
6876 | * | |
6877 | * RETURNS: | |
6878 | * The final register value. | |
6879 | */ | |
6880 | u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val, | |
6881 | unsigned long interval_msec, | |
6882 | unsigned long timeout_msec) | |
6883 | { | |
6884 | unsigned long timeout; | |
6885 | u32 tmp; | |
6886 | ||
6887 | tmp = ioread32(reg); | |
6888 | ||
6889 | /* Calculate timeout _after_ the first read to make sure | |
6890 | * preceding writes reach the controller before starting to | |
6891 | * eat away the timeout. | |
6892 | */ | |
6893 | timeout = jiffies + (timeout_msec * HZ) / 1000; | |
6894 | ||
6895 | while ((tmp & mask) == val && time_before(jiffies, timeout)) { | |
6896 | msleep(interval_msec); | |
6897 | tmp = ioread32(reg); | |
6898 | } | |
6899 | ||
6900 | return tmp; | |
6901 | } | |
6902 | ||
6903 | /* | |
6904 | * Dummy port_ops | |
6905 | */ | |
6906 | static void ata_dummy_noret(struct ata_port *ap) { } | |
6907 | static int ata_dummy_ret0(struct ata_port *ap) { return 0; } | |
6908 | static void ata_dummy_qc_noret(struct ata_queued_cmd *qc) { } | |
6909 | ||
6910 | static u8 ata_dummy_check_status(struct ata_port *ap) | |
6911 | { | |
6912 | return ATA_DRDY; | |
6913 | } | |
6914 | ||
6915 | static unsigned int ata_dummy_qc_issue(struct ata_queued_cmd *qc) | |
6916 | { | |
6917 | return AC_ERR_SYSTEM; | |
6918 | } | |
6919 | ||
6920 | const struct ata_port_operations ata_dummy_port_ops = { | |
6921 | .port_disable = ata_port_disable, | |
6922 | .check_status = ata_dummy_check_status, | |
6923 | .check_altstatus = ata_dummy_check_status, | |
6924 | .dev_select = ata_noop_dev_select, | |
6925 | .qc_prep = ata_noop_qc_prep, | |
6926 | .qc_issue = ata_dummy_qc_issue, | |
6927 | .freeze = ata_dummy_noret, | |
6928 | .thaw = ata_dummy_noret, | |
6929 | .error_handler = ata_dummy_noret, | |
6930 | .post_internal_cmd = ata_dummy_qc_noret, | |
6931 | .irq_clear = ata_dummy_noret, | |
6932 | .port_start = ata_dummy_ret0, | |
6933 | .port_stop = ata_dummy_noret, | |
6934 | }; | |
6935 | ||
6936 | const struct ata_port_info ata_dummy_port_info = { | |
6937 | .port_ops = &ata_dummy_port_ops, | |
6938 | }; | |
6939 | ||
6940 | /* | |
6941 | * libata is essentially a library of internal helper functions for | |
6942 | * low-level ATA host controller drivers. As such, the API/ABI is | |
6943 | * likely to change as new drivers are added and updated. | |
6944 | * Do not depend on ABI/API stability. | |
6945 | */ | |
6946 | ||
6947 | EXPORT_SYMBOL_GPL(sata_deb_timing_normal); | |
6948 | EXPORT_SYMBOL_GPL(sata_deb_timing_hotplug); | |
6949 | EXPORT_SYMBOL_GPL(sata_deb_timing_long); | |
6950 | EXPORT_SYMBOL_GPL(ata_dummy_port_ops); | |
6951 | EXPORT_SYMBOL_GPL(ata_dummy_port_info); | |
6952 | EXPORT_SYMBOL_GPL(ata_std_bios_param); | |
6953 | EXPORT_SYMBOL_GPL(ata_std_ports); | |
6954 | EXPORT_SYMBOL_GPL(ata_host_init); | |
6955 | EXPORT_SYMBOL_GPL(ata_host_alloc); | |
6956 | EXPORT_SYMBOL_GPL(ata_host_alloc_pinfo); | |
6957 | EXPORT_SYMBOL_GPL(ata_host_start); | |
6958 | EXPORT_SYMBOL_GPL(ata_host_register); | |
6959 | EXPORT_SYMBOL_GPL(ata_host_activate); | |
6960 | EXPORT_SYMBOL_GPL(ata_host_detach); | |
6961 | EXPORT_SYMBOL_GPL(ata_sg_init); | |
6962 | EXPORT_SYMBOL_GPL(ata_sg_init_one); | |
6963 | EXPORT_SYMBOL_GPL(ata_hsm_move); | |
6964 | EXPORT_SYMBOL_GPL(ata_qc_complete); | |
6965 | EXPORT_SYMBOL_GPL(ata_qc_complete_multiple); | |
6966 | EXPORT_SYMBOL_GPL(ata_qc_issue_prot); | |
6967 | EXPORT_SYMBOL_GPL(ata_tf_load); | |
6968 | EXPORT_SYMBOL_GPL(ata_tf_read); | |
6969 | EXPORT_SYMBOL_GPL(ata_noop_dev_select); | |
6970 | EXPORT_SYMBOL_GPL(ata_std_dev_select); | |
6971 | EXPORT_SYMBOL_GPL(sata_print_link_status); | |
6972 | EXPORT_SYMBOL_GPL(ata_tf_to_fis); | |
6973 | EXPORT_SYMBOL_GPL(ata_tf_from_fis); | |
6974 | EXPORT_SYMBOL_GPL(ata_check_status); | |
6975 | EXPORT_SYMBOL_GPL(ata_altstatus); | |
6976 | EXPORT_SYMBOL_GPL(ata_exec_command); | |
6977 | EXPORT_SYMBOL_GPL(ata_port_start); | |
6978 | EXPORT_SYMBOL_GPL(ata_sff_port_start); | |
6979 | EXPORT_SYMBOL_GPL(ata_interrupt); | |
6980 | EXPORT_SYMBOL_GPL(ata_do_set_mode); | |
6981 | EXPORT_SYMBOL_GPL(ata_data_xfer); | |
6982 | EXPORT_SYMBOL_GPL(ata_data_xfer_noirq); | |
6983 | EXPORT_SYMBOL_GPL(ata_qc_prep); | |
6984 | EXPORT_SYMBOL_GPL(ata_dumb_qc_prep); | |
6985 | EXPORT_SYMBOL_GPL(ata_noop_qc_prep); | |
6986 | EXPORT_SYMBOL_GPL(ata_bmdma_setup); | |
6987 | EXPORT_SYMBOL_GPL(ata_bmdma_start); | |
6988 | EXPORT_SYMBOL_GPL(ata_bmdma_irq_clear); | |
6989 | EXPORT_SYMBOL_GPL(ata_bmdma_status); | |
6990 | EXPORT_SYMBOL_GPL(ata_bmdma_stop); | |
6991 | EXPORT_SYMBOL_GPL(ata_bmdma_freeze); | |
6992 | EXPORT_SYMBOL_GPL(ata_bmdma_thaw); | |
6993 | EXPORT_SYMBOL_GPL(ata_bmdma_drive_eh); | |
6994 | EXPORT_SYMBOL_GPL(ata_bmdma_error_handler); | |
6995 | EXPORT_SYMBOL_GPL(ata_bmdma_post_internal_cmd); | |
6996 | EXPORT_SYMBOL_GPL(ata_port_probe); | |
6997 | EXPORT_SYMBOL_GPL(ata_dev_disable); | |
6998 | EXPORT_SYMBOL_GPL(sata_set_spd); | |
6999 | EXPORT_SYMBOL_GPL(sata_link_debounce); | |
7000 | EXPORT_SYMBOL_GPL(sata_link_resume); | |
7001 | EXPORT_SYMBOL_GPL(sata_phy_reset); | |
7002 | EXPORT_SYMBOL_GPL(__sata_phy_reset); | |
7003 | EXPORT_SYMBOL_GPL(ata_bus_reset); | |
7004 | EXPORT_SYMBOL_GPL(ata_std_prereset); | |
7005 | EXPORT_SYMBOL_GPL(ata_std_softreset); | |
7006 | EXPORT_SYMBOL_GPL(sata_link_hardreset); | |
7007 | EXPORT_SYMBOL_GPL(sata_std_hardreset); | |
7008 | EXPORT_SYMBOL_GPL(ata_std_postreset); | |
7009 | EXPORT_SYMBOL_GPL(ata_dev_classify); | |
7010 | EXPORT_SYMBOL_GPL(ata_dev_pair); | |
7011 | EXPORT_SYMBOL_GPL(ata_port_disable); | |
7012 | EXPORT_SYMBOL_GPL(ata_ratelimit); | |
7013 | EXPORT_SYMBOL_GPL(ata_wait_register); | |
7014 | EXPORT_SYMBOL_GPL(ata_busy_sleep); | |
7015 | EXPORT_SYMBOL_GPL(ata_wait_ready); | |
7016 | EXPORT_SYMBOL_GPL(ata_port_queue_task); | |
7017 | EXPORT_SYMBOL_GPL(ata_scsi_ioctl); | |
7018 | EXPORT_SYMBOL_GPL(ata_scsi_queuecmd); | |
7019 | EXPORT_SYMBOL_GPL(ata_scsi_slave_config); | |
7020 | EXPORT_SYMBOL_GPL(ata_scsi_slave_destroy); | |
7021 | EXPORT_SYMBOL_GPL(ata_scsi_change_queue_depth); | |
7022 | EXPORT_SYMBOL_GPL(ata_host_intr); | |
7023 | EXPORT_SYMBOL_GPL(sata_scr_valid); | |
7024 | EXPORT_SYMBOL_GPL(sata_scr_read); | |
7025 | EXPORT_SYMBOL_GPL(sata_scr_write); | |
7026 | EXPORT_SYMBOL_GPL(sata_scr_write_flush); | |
7027 | EXPORT_SYMBOL_GPL(ata_link_online); | |
7028 | EXPORT_SYMBOL_GPL(ata_link_offline); | |
7029 | #ifdef CONFIG_PM | |
7030 | EXPORT_SYMBOL_GPL(ata_host_suspend); | |
7031 | EXPORT_SYMBOL_GPL(ata_host_resume); | |
7032 | #endif /* CONFIG_PM */ | |
7033 | EXPORT_SYMBOL_GPL(ata_id_string); | |
7034 | EXPORT_SYMBOL_GPL(ata_id_c_string); | |
7035 | EXPORT_SYMBOL_GPL(ata_id_to_dma_mode); | |
7036 | EXPORT_SYMBOL_GPL(ata_scsi_simulate); | |
7037 | ||
7038 | EXPORT_SYMBOL_GPL(ata_pio_need_iordy); | |
7039 | EXPORT_SYMBOL_GPL(ata_timing_compute); | |
7040 | EXPORT_SYMBOL_GPL(ata_timing_merge); | |
7041 | ||
7042 | #ifdef CONFIG_PCI | |
7043 | EXPORT_SYMBOL_GPL(pci_test_config_bits); | |
7044 | EXPORT_SYMBOL_GPL(ata_pci_init_sff_host); | |
7045 | EXPORT_SYMBOL_GPL(ata_pci_init_bmdma); | |
7046 | EXPORT_SYMBOL_GPL(ata_pci_prepare_sff_host); | |
7047 | EXPORT_SYMBOL_GPL(ata_pci_init_one); | |
7048 | EXPORT_SYMBOL_GPL(ata_pci_remove_one); | |
7049 | #ifdef CONFIG_PM | |
7050 | EXPORT_SYMBOL_GPL(ata_pci_device_do_suspend); | |
7051 | EXPORT_SYMBOL_GPL(ata_pci_device_do_resume); | |
7052 | EXPORT_SYMBOL_GPL(ata_pci_device_suspend); | |
7053 | EXPORT_SYMBOL_GPL(ata_pci_device_resume); | |
7054 | #endif /* CONFIG_PM */ | |
7055 | EXPORT_SYMBOL_GPL(ata_pci_default_filter); | |
7056 | EXPORT_SYMBOL_GPL(ata_pci_clear_simplex); | |
7057 | #endif /* CONFIG_PCI */ | |
7058 | ||
7059 | EXPORT_SYMBOL_GPL(__ata_ehi_push_desc); | |
7060 | EXPORT_SYMBOL_GPL(ata_ehi_push_desc); | |
7061 | EXPORT_SYMBOL_GPL(ata_ehi_clear_desc); | |
7062 | EXPORT_SYMBOL_GPL(ata_eng_timeout); | |
7063 | EXPORT_SYMBOL_GPL(ata_port_schedule_eh); | |
7064 | EXPORT_SYMBOL_GPL(ata_link_abort); | |
7065 | EXPORT_SYMBOL_GPL(ata_port_abort); | |
7066 | EXPORT_SYMBOL_GPL(ata_port_freeze); | |
7067 | EXPORT_SYMBOL_GPL(ata_eh_freeze_port); | |
7068 | EXPORT_SYMBOL_GPL(ata_eh_thaw_port); | |
7069 | EXPORT_SYMBOL_GPL(ata_eh_qc_complete); | |
7070 | EXPORT_SYMBOL_GPL(ata_eh_qc_retry); | |
7071 | EXPORT_SYMBOL_GPL(ata_do_eh); | |
7072 | EXPORT_SYMBOL_GPL(ata_irq_on); | |
7073 | EXPORT_SYMBOL_GPL(ata_dummy_irq_on); | |
7074 | EXPORT_SYMBOL_GPL(ata_irq_ack); | |
7075 | EXPORT_SYMBOL_GPL(ata_dummy_irq_ack); | |
7076 | EXPORT_SYMBOL_GPL(ata_dev_try_classify); | |
7077 | ||
7078 | EXPORT_SYMBOL_GPL(ata_cable_40wire); | |
7079 | EXPORT_SYMBOL_GPL(ata_cable_80wire); | |
7080 | EXPORT_SYMBOL_GPL(ata_cable_unknown); | |
7081 | EXPORT_SYMBOL_GPL(ata_cable_sata); |