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1da177e4 | 1 | /* |
af36d7f0 JG |
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 | * | |
1da177e4 LT |
33 | */ |
34 | ||
1da177e4 LT |
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> | |
67846b30 | 50 | #include <linux/jiffies.h> |
378f058c | 51 | #include <linux/scatterlist.h> |
1da177e4 | 52 | #include <scsi/scsi.h> |
193515d5 | 53 | #include <scsi/scsi_cmnd.h> |
1da177e4 LT |
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 | ||
cb48cab7 | 62 | #define DRV_VERSION "2.20" /* must be exactly four chars */ |
fda0efc5 JG |
63 | |
64 | ||
d7bb4cc7 | 65 | /* debounce timing parameters in msecs { interval, duration, timeout } */ |
e9c83914 TH |
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 }; | |
d7bb4cc7 | 69 | |
3373efd8 TH |
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); | |
1da177e4 | 74 | |
f3187195 | 75 | unsigned int ata_print_id = 1; |
1da177e4 LT |
76 | static struct workqueue_struct *ata_wq; |
77 | ||
453b07ac TH |
78 | struct workqueue_struct *ata_aux_wq; |
79 | ||
418dc1f5 | 80 | int atapi_enabled = 1; |
1623c81e JG |
81 | module_param(atapi_enabled, int, 0444); |
82 | MODULE_PARM_DESC(atapi_enabled, "Enable discovery of ATAPI devices (0=off, 1=on)"); | |
83 | ||
95de719a AL |
84 | int atapi_dmadir = 0; |
85 | module_param(atapi_dmadir, int, 0444); | |
86 | MODULE_PARM_DESC(atapi_dmadir, "Enable ATAPI DMADIR bridge support (0=off, 1=on)"); | |
87 | ||
c3c013a2 JG |
88 | int libata_fua = 0; |
89 | module_param_named(fua, libata_fua, int, 0444); | |
90 | MODULE_PARM_DESC(fua, "FUA support (0=off, 1=on)"); | |
91 | ||
1e999736 AC |
92 | static int ata_ignore_hpa = 0; |
93 | module_param_named(ignore_hpa, ata_ignore_hpa, int, 0644); | |
94 | MODULE_PARM_DESC(ignore_hpa, "Ignore HPA limit (0=keep BIOS limits, 1=ignore limits, using full disk)"); | |
95 | ||
a8601e5f AM |
96 | static int ata_probe_timeout = ATA_TMOUT_INTERNAL / HZ; |
97 | module_param(ata_probe_timeout, int, 0444); | |
98 | MODULE_PARM_DESC(ata_probe_timeout, "Set ATA probing timeout (seconds)"); | |
99 | ||
d7d0dad6 JG |
100 | int libata_noacpi = 1; |
101 | module_param_named(noacpi, libata_noacpi, int, 0444); | |
11ef697b KCA |
102 | MODULE_PARM_DESC(noacpi, "Disables the use of ACPI in suspend/resume when set"); |
103 | ||
1da177e4 LT |
104 | MODULE_AUTHOR("Jeff Garzik"); |
105 | MODULE_DESCRIPTION("Library module for ATA devices"); | |
106 | MODULE_LICENSE("GPL"); | |
107 | MODULE_VERSION(DRV_VERSION); | |
108 | ||
0baab86b | 109 | |
1da177e4 LT |
110 | /** |
111 | * ata_tf_to_fis - Convert ATA taskfile to SATA FIS structure | |
112 | * @tf: Taskfile to convert | |
113 | * @fis: Buffer into which data will output | |
114 | * @pmp: Port multiplier port | |
115 | * | |
116 | * Converts a standard ATA taskfile to a Serial ATA | |
117 | * FIS structure (Register - Host to Device). | |
118 | * | |
119 | * LOCKING: | |
120 | * Inherited from caller. | |
121 | */ | |
122 | ||
057ace5e | 123 | void ata_tf_to_fis(const struct ata_taskfile *tf, u8 *fis, u8 pmp) |
1da177e4 LT |
124 | { |
125 | fis[0] = 0x27; /* Register - Host to Device FIS */ | |
126 | fis[1] = (pmp & 0xf) | (1 << 7); /* Port multiplier number, | |
127 | bit 7 indicates Command FIS */ | |
128 | fis[2] = tf->command; | |
129 | fis[3] = tf->feature; | |
130 | ||
131 | fis[4] = tf->lbal; | |
132 | fis[5] = tf->lbam; | |
133 | fis[6] = tf->lbah; | |
134 | fis[7] = tf->device; | |
135 | ||
136 | fis[8] = tf->hob_lbal; | |
137 | fis[9] = tf->hob_lbam; | |
138 | fis[10] = tf->hob_lbah; | |
139 | fis[11] = tf->hob_feature; | |
140 | ||
141 | fis[12] = tf->nsect; | |
142 | fis[13] = tf->hob_nsect; | |
143 | fis[14] = 0; | |
144 | fis[15] = tf->ctl; | |
145 | ||
146 | fis[16] = 0; | |
147 | fis[17] = 0; | |
148 | fis[18] = 0; | |
149 | fis[19] = 0; | |
150 | } | |
151 | ||
152 | /** | |
153 | * ata_tf_from_fis - Convert SATA FIS to ATA taskfile | |
154 | * @fis: Buffer from which data will be input | |
155 | * @tf: Taskfile to output | |
156 | * | |
e12a1be6 | 157 | * Converts a serial ATA FIS structure to a standard ATA taskfile. |
1da177e4 LT |
158 | * |
159 | * LOCKING: | |
160 | * Inherited from caller. | |
161 | */ | |
162 | ||
057ace5e | 163 | void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf) |
1da177e4 LT |
164 | { |
165 | tf->command = fis[2]; /* status */ | |
166 | tf->feature = fis[3]; /* error */ | |
167 | ||
168 | tf->lbal = fis[4]; | |
169 | tf->lbam = fis[5]; | |
170 | tf->lbah = fis[6]; | |
171 | tf->device = fis[7]; | |
172 | ||
173 | tf->hob_lbal = fis[8]; | |
174 | tf->hob_lbam = fis[9]; | |
175 | tf->hob_lbah = fis[10]; | |
176 | ||
177 | tf->nsect = fis[12]; | |
178 | tf->hob_nsect = fis[13]; | |
179 | } | |
180 | ||
8cbd6df1 AL |
181 | static const u8 ata_rw_cmds[] = { |
182 | /* pio multi */ | |
183 | ATA_CMD_READ_MULTI, | |
184 | ATA_CMD_WRITE_MULTI, | |
185 | ATA_CMD_READ_MULTI_EXT, | |
186 | ATA_CMD_WRITE_MULTI_EXT, | |
9a3dccc4 TH |
187 | 0, |
188 | 0, | |
189 | 0, | |
190 | ATA_CMD_WRITE_MULTI_FUA_EXT, | |
8cbd6df1 AL |
191 | /* pio */ |
192 | ATA_CMD_PIO_READ, | |
193 | ATA_CMD_PIO_WRITE, | |
194 | ATA_CMD_PIO_READ_EXT, | |
195 | ATA_CMD_PIO_WRITE_EXT, | |
9a3dccc4 TH |
196 | 0, |
197 | 0, | |
198 | 0, | |
199 | 0, | |
8cbd6df1 AL |
200 | /* dma */ |
201 | ATA_CMD_READ, | |
202 | ATA_CMD_WRITE, | |
203 | ATA_CMD_READ_EXT, | |
9a3dccc4 TH |
204 | ATA_CMD_WRITE_EXT, |
205 | 0, | |
206 | 0, | |
207 | 0, | |
208 | ATA_CMD_WRITE_FUA_EXT | |
8cbd6df1 | 209 | }; |
1da177e4 LT |
210 | |
211 | /** | |
8cbd6df1 | 212 | * ata_rwcmd_protocol - set taskfile r/w commands and protocol |
bd056d7e TH |
213 | * @tf: command to examine and configure |
214 | * @dev: device tf belongs to | |
1da177e4 | 215 | * |
2e9edbf8 | 216 | * Examine the device configuration and tf->flags to calculate |
8cbd6df1 | 217 | * the proper read/write commands and protocol to use. |
1da177e4 LT |
218 | * |
219 | * LOCKING: | |
220 | * caller. | |
221 | */ | |
bd056d7e | 222 | static int ata_rwcmd_protocol(struct ata_taskfile *tf, struct ata_device *dev) |
1da177e4 | 223 | { |
9a3dccc4 | 224 | u8 cmd; |
1da177e4 | 225 | |
9a3dccc4 | 226 | int index, fua, lba48, write; |
2e9edbf8 | 227 | |
9a3dccc4 | 228 | fua = (tf->flags & ATA_TFLAG_FUA) ? 4 : 0; |
8cbd6df1 AL |
229 | lba48 = (tf->flags & ATA_TFLAG_LBA48) ? 2 : 0; |
230 | write = (tf->flags & ATA_TFLAG_WRITE) ? 1 : 0; | |
1da177e4 | 231 | |
8cbd6df1 AL |
232 | if (dev->flags & ATA_DFLAG_PIO) { |
233 | tf->protocol = ATA_PROT_PIO; | |
9a3dccc4 | 234 | index = dev->multi_count ? 0 : 8; |
bd056d7e | 235 | } else if (lba48 && (dev->ap->flags & ATA_FLAG_PIO_LBA48)) { |
8d238e01 AC |
236 | /* Unable to use DMA due to host limitation */ |
237 | tf->protocol = ATA_PROT_PIO; | |
0565c26d | 238 | index = dev->multi_count ? 0 : 8; |
8cbd6df1 AL |
239 | } else { |
240 | tf->protocol = ATA_PROT_DMA; | |
9a3dccc4 | 241 | index = 16; |
8cbd6df1 | 242 | } |
1da177e4 | 243 | |
9a3dccc4 TH |
244 | cmd = ata_rw_cmds[index + fua + lba48 + write]; |
245 | if (cmd) { | |
246 | tf->command = cmd; | |
247 | return 0; | |
248 | } | |
249 | return -1; | |
1da177e4 LT |
250 | } |
251 | ||
35b649fe TH |
252 | /** |
253 | * ata_tf_read_block - Read block address from ATA taskfile | |
254 | * @tf: ATA taskfile of interest | |
255 | * @dev: ATA device @tf belongs to | |
256 | * | |
257 | * LOCKING: | |
258 | * None. | |
259 | * | |
260 | * Read block address from @tf. This function can handle all | |
261 | * three address formats - LBA, LBA48 and CHS. tf->protocol and | |
262 | * flags select the address format to use. | |
263 | * | |
264 | * RETURNS: | |
265 | * Block address read from @tf. | |
266 | */ | |
267 | u64 ata_tf_read_block(struct ata_taskfile *tf, struct ata_device *dev) | |
268 | { | |
269 | u64 block = 0; | |
270 | ||
271 | if (tf->flags & ATA_TFLAG_LBA) { | |
272 | if (tf->flags & ATA_TFLAG_LBA48) { | |
273 | block |= (u64)tf->hob_lbah << 40; | |
274 | block |= (u64)tf->hob_lbam << 32; | |
275 | block |= tf->hob_lbal << 24; | |
276 | } else | |
277 | block |= (tf->device & 0xf) << 24; | |
278 | ||
279 | block |= tf->lbah << 16; | |
280 | block |= tf->lbam << 8; | |
281 | block |= tf->lbal; | |
282 | } else { | |
283 | u32 cyl, head, sect; | |
284 | ||
285 | cyl = tf->lbam | (tf->lbah << 8); | |
286 | head = tf->device & 0xf; | |
287 | sect = tf->lbal; | |
288 | ||
289 | block = (cyl * dev->heads + head) * dev->sectors + sect; | |
290 | } | |
291 | ||
292 | return block; | |
293 | } | |
294 | ||
bd056d7e TH |
295 | /** |
296 | * ata_build_rw_tf - Build ATA taskfile for given read/write request | |
297 | * @tf: Target ATA taskfile | |
298 | * @dev: ATA device @tf belongs to | |
299 | * @block: Block address | |
300 | * @n_block: Number of blocks | |
301 | * @tf_flags: RW/FUA etc... | |
302 | * @tag: tag | |
303 | * | |
304 | * LOCKING: | |
305 | * None. | |
306 | * | |
307 | * Build ATA taskfile @tf for read/write request described by | |
308 | * @block, @n_block, @tf_flags and @tag on @dev. | |
309 | * | |
310 | * RETURNS: | |
311 | * | |
312 | * 0 on success, -ERANGE if the request is too large for @dev, | |
313 | * -EINVAL if the request is invalid. | |
314 | */ | |
315 | int ata_build_rw_tf(struct ata_taskfile *tf, struct ata_device *dev, | |
316 | u64 block, u32 n_block, unsigned int tf_flags, | |
317 | unsigned int tag) | |
318 | { | |
319 | tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
320 | tf->flags |= tf_flags; | |
321 | ||
6d1245bf | 322 | if (ata_ncq_enabled(dev) && likely(tag != ATA_TAG_INTERNAL)) { |
bd056d7e TH |
323 | /* yay, NCQ */ |
324 | if (!lba_48_ok(block, n_block)) | |
325 | return -ERANGE; | |
326 | ||
327 | tf->protocol = ATA_PROT_NCQ; | |
328 | tf->flags |= ATA_TFLAG_LBA | ATA_TFLAG_LBA48; | |
329 | ||
330 | if (tf->flags & ATA_TFLAG_WRITE) | |
331 | tf->command = ATA_CMD_FPDMA_WRITE; | |
332 | else | |
333 | tf->command = ATA_CMD_FPDMA_READ; | |
334 | ||
335 | tf->nsect = tag << 3; | |
336 | tf->hob_feature = (n_block >> 8) & 0xff; | |
337 | tf->feature = n_block & 0xff; | |
338 | ||
339 | tf->hob_lbah = (block >> 40) & 0xff; | |
340 | tf->hob_lbam = (block >> 32) & 0xff; | |
341 | tf->hob_lbal = (block >> 24) & 0xff; | |
342 | tf->lbah = (block >> 16) & 0xff; | |
343 | tf->lbam = (block >> 8) & 0xff; | |
344 | tf->lbal = block & 0xff; | |
345 | ||
346 | tf->device = 1 << 6; | |
347 | if (tf->flags & ATA_TFLAG_FUA) | |
348 | tf->device |= 1 << 7; | |
349 | } else if (dev->flags & ATA_DFLAG_LBA) { | |
350 | tf->flags |= ATA_TFLAG_LBA; | |
351 | ||
352 | if (lba_28_ok(block, n_block)) { | |
353 | /* use LBA28 */ | |
354 | tf->device |= (block >> 24) & 0xf; | |
355 | } else if (lba_48_ok(block, n_block)) { | |
356 | if (!(dev->flags & ATA_DFLAG_LBA48)) | |
357 | return -ERANGE; | |
358 | ||
359 | /* use LBA48 */ | |
360 | tf->flags |= ATA_TFLAG_LBA48; | |
361 | ||
362 | tf->hob_nsect = (n_block >> 8) & 0xff; | |
363 | ||
364 | tf->hob_lbah = (block >> 40) & 0xff; | |
365 | tf->hob_lbam = (block >> 32) & 0xff; | |
366 | tf->hob_lbal = (block >> 24) & 0xff; | |
367 | } else | |
368 | /* request too large even for LBA48 */ | |
369 | return -ERANGE; | |
370 | ||
371 | if (unlikely(ata_rwcmd_protocol(tf, dev) < 0)) | |
372 | return -EINVAL; | |
373 | ||
374 | tf->nsect = n_block & 0xff; | |
375 | ||
376 | tf->lbah = (block >> 16) & 0xff; | |
377 | tf->lbam = (block >> 8) & 0xff; | |
378 | tf->lbal = block & 0xff; | |
379 | ||
380 | tf->device |= ATA_LBA; | |
381 | } else { | |
382 | /* CHS */ | |
383 | u32 sect, head, cyl, track; | |
384 | ||
385 | /* The request -may- be too large for CHS addressing. */ | |
386 | if (!lba_28_ok(block, n_block)) | |
387 | return -ERANGE; | |
388 | ||
389 | if (unlikely(ata_rwcmd_protocol(tf, dev) < 0)) | |
390 | return -EINVAL; | |
391 | ||
392 | /* Convert LBA to CHS */ | |
393 | track = (u32)block / dev->sectors; | |
394 | cyl = track / dev->heads; | |
395 | head = track % dev->heads; | |
396 | sect = (u32)block % dev->sectors + 1; | |
397 | ||
398 | DPRINTK("block %u track %u cyl %u head %u sect %u\n", | |
399 | (u32)block, track, cyl, head, sect); | |
400 | ||
401 | /* Check whether the converted CHS can fit. | |
402 | Cylinder: 0-65535 | |
403 | Head: 0-15 | |
404 | Sector: 1-255*/ | |
405 | if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect)) | |
406 | return -ERANGE; | |
407 | ||
408 | tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */ | |
409 | tf->lbal = sect; | |
410 | tf->lbam = cyl; | |
411 | tf->lbah = cyl >> 8; | |
412 | tf->device |= head; | |
413 | } | |
414 | ||
415 | return 0; | |
416 | } | |
417 | ||
cb95d562 TH |
418 | /** |
419 | * ata_pack_xfermask - Pack pio, mwdma and udma masks into xfer_mask | |
420 | * @pio_mask: pio_mask | |
421 | * @mwdma_mask: mwdma_mask | |
422 | * @udma_mask: udma_mask | |
423 | * | |
424 | * Pack @pio_mask, @mwdma_mask and @udma_mask into a single | |
425 | * unsigned int xfer_mask. | |
426 | * | |
427 | * LOCKING: | |
428 | * None. | |
429 | * | |
430 | * RETURNS: | |
431 | * Packed xfer_mask. | |
432 | */ | |
433 | static unsigned int ata_pack_xfermask(unsigned int pio_mask, | |
434 | unsigned int mwdma_mask, | |
435 | unsigned int udma_mask) | |
436 | { | |
437 | return ((pio_mask << ATA_SHIFT_PIO) & ATA_MASK_PIO) | | |
438 | ((mwdma_mask << ATA_SHIFT_MWDMA) & ATA_MASK_MWDMA) | | |
439 | ((udma_mask << ATA_SHIFT_UDMA) & ATA_MASK_UDMA); | |
440 | } | |
441 | ||
c0489e4e TH |
442 | /** |
443 | * ata_unpack_xfermask - Unpack xfer_mask into pio, mwdma and udma masks | |
444 | * @xfer_mask: xfer_mask to unpack | |
445 | * @pio_mask: resulting pio_mask | |
446 | * @mwdma_mask: resulting mwdma_mask | |
447 | * @udma_mask: resulting udma_mask | |
448 | * | |
449 | * Unpack @xfer_mask into @pio_mask, @mwdma_mask and @udma_mask. | |
450 | * Any NULL distination masks will be ignored. | |
451 | */ | |
452 | static void ata_unpack_xfermask(unsigned int xfer_mask, | |
453 | unsigned int *pio_mask, | |
454 | unsigned int *mwdma_mask, | |
455 | unsigned int *udma_mask) | |
456 | { | |
457 | if (pio_mask) | |
458 | *pio_mask = (xfer_mask & ATA_MASK_PIO) >> ATA_SHIFT_PIO; | |
459 | if (mwdma_mask) | |
460 | *mwdma_mask = (xfer_mask & ATA_MASK_MWDMA) >> ATA_SHIFT_MWDMA; | |
461 | if (udma_mask) | |
462 | *udma_mask = (xfer_mask & ATA_MASK_UDMA) >> ATA_SHIFT_UDMA; | |
463 | } | |
464 | ||
cb95d562 | 465 | static const struct ata_xfer_ent { |
be9a50c8 | 466 | int shift, bits; |
cb95d562 TH |
467 | u8 base; |
468 | } ata_xfer_tbl[] = { | |
469 | { ATA_SHIFT_PIO, ATA_BITS_PIO, XFER_PIO_0 }, | |
470 | { ATA_SHIFT_MWDMA, ATA_BITS_MWDMA, XFER_MW_DMA_0 }, | |
471 | { ATA_SHIFT_UDMA, ATA_BITS_UDMA, XFER_UDMA_0 }, | |
472 | { -1, }, | |
473 | }; | |
474 | ||
475 | /** | |
476 | * ata_xfer_mask2mode - Find matching XFER_* for the given xfer_mask | |
477 | * @xfer_mask: xfer_mask of interest | |
478 | * | |
479 | * Return matching XFER_* value for @xfer_mask. Only the highest | |
480 | * bit of @xfer_mask is considered. | |
481 | * | |
482 | * LOCKING: | |
483 | * None. | |
484 | * | |
485 | * RETURNS: | |
486 | * Matching XFER_* value, 0 if no match found. | |
487 | */ | |
488 | static u8 ata_xfer_mask2mode(unsigned int xfer_mask) | |
489 | { | |
490 | int highbit = fls(xfer_mask) - 1; | |
491 | const struct ata_xfer_ent *ent; | |
492 | ||
493 | for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) | |
494 | if (highbit >= ent->shift && highbit < ent->shift + ent->bits) | |
495 | return ent->base + highbit - ent->shift; | |
496 | return 0; | |
497 | } | |
498 | ||
499 | /** | |
500 | * ata_xfer_mode2mask - Find matching xfer_mask for XFER_* | |
501 | * @xfer_mode: XFER_* of interest | |
502 | * | |
503 | * Return matching xfer_mask for @xfer_mode. | |
504 | * | |
505 | * LOCKING: | |
506 | * None. | |
507 | * | |
508 | * RETURNS: | |
509 | * Matching xfer_mask, 0 if no match found. | |
510 | */ | |
511 | static unsigned int ata_xfer_mode2mask(u8 xfer_mode) | |
512 | { | |
513 | const struct ata_xfer_ent *ent; | |
514 | ||
515 | for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) | |
516 | if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits) | |
517 | return 1 << (ent->shift + xfer_mode - ent->base); | |
518 | return 0; | |
519 | } | |
520 | ||
521 | /** | |
522 | * ata_xfer_mode2shift - Find matching xfer_shift for XFER_* | |
523 | * @xfer_mode: XFER_* of interest | |
524 | * | |
525 | * Return matching xfer_shift for @xfer_mode. | |
526 | * | |
527 | * LOCKING: | |
528 | * None. | |
529 | * | |
530 | * RETURNS: | |
531 | * Matching xfer_shift, -1 if no match found. | |
532 | */ | |
533 | static int ata_xfer_mode2shift(unsigned int xfer_mode) | |
534 | { | |
535 | const struct ata_xfer_ent *ent; | |
536 | ||
537 | for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) | |
538 | if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits) | |
539 | return ent->shift; | |
540 | return -1; | |
541 | } | |
542 | ||
1da177e4 | 543 | /** |
1da7b0d0 TH |
544 | * ata_mode_string - convert xfer_mask to string |
545 | * @xfer_mask: mask of bits supported; only highest bit counts. | |
1da177e4 LT |
546 | * |
547 | * Determine string which represents the highest speed | |
1da7b0d0 | 548 | * (highest bit in @modemask). |
1da177e4 LT |
549 | * |
550 | * LOCKING: | |
551 | * None. | |
552 | * | |
553 | * RETURNS: | |
554 | * Constant C string representing highest speed listed in | |
1da7b0d0 | 555 | * @mode_mask, or the constant C string "<n/a>". |
1da177e4 | 556 | */ |
1da7b0d0 | 557 | static const char *ata_mode_string(unsigned int xfer_mask) |
1da177e4 | 558 | { |
75f554bc TH |
559 | static const char * const xfer_mode_str[] = { |
560 | "PIO0", | |
561 | "PIO1", | |
562 | "PIO2", | |
563 | "PIO3", | |
564 | "PIO4", | |
b352e57d AC |
565 | "PIO5", |
566 | "PIO6", | |
75f554bc TH |
567 | "MWDMA0", |
568 | "MWDMA1", | |
569 | "MWDMA2", | |
b352e57d AC |
570 | "MWDMA3", |
571 | "MWDMA4", | |
75f554bc TH |
572 | "UDMA/16", |
573 | "UDMA/25", | |
574 | "UDMA/33", | |
575 | "UDMA/44", | |
576 | "UDMA/66", | |
577 | "UDMA/100", | |
578 | "UDMA/133", | |
579 | "UDMA7", | |
580 | }; | |
1da7b0d0 | 581 | int highbit; |
1da177e4 | 582 | |
1da7b0d0 TH |
583 | highbit = fls(xfer_mask) - 1; |
584 | if (highbit >= 0 && highbit < ARRAY_SIZE(xfer_mode_str)) | |
585 | return xfer_mode_str[highbit]; | |
1da177e4 | 586 | return "<n/a>"; |
1da177e4 LT |
587 | } |
588 | ||
4c360c81 TH |
589 | static const char *sata_spd_string(unsigned int spd) |
590 | { | |
591 | static const char * const spd_str[] = { | |
592 | "1.5 Gbps", | |
593 | "3.0 Gbps", | |
594 | }; | |
595 | ||
596 | if (spd == 0 || (spd - 1) >= ARRAY_SIZE(spd_str)) | |
597 | return "<unknown>"; | |
598 | return spd_str[spd - 1]; | |
599 | } | |
600 | ||
3373efd8 | 601 | void ata_dev_disable(struct ata_device *dev) |
0b8efb0a | 602 | { |
0dd4b21f | 603 | if (ata_dev_enabled(dev) && ata_msg_drv(dev->ap)) { |
f15a1daf | 604 | ata_dev_printk(dev, KERN_WARNING, "disabled\n"); |
4ae72a1e TH |
605 | ata_down_xfermask_limit(dev, ATA_DNXFER_FORCE_PIO0 | |
606 | ATA_DNXFER_QUIET); | |
0b8efb0a TH |
607 | dev->class++; |
608 | } | |
609 | } | |
610 | ||
1da177e4 | 611 | /** |
0d5ff566 | 612 | * ata_devchk - PATA device presence detection |
1da177e4 LT |
613 | * @ap: ATA channel to examine |
614 | * @device: Device to examine (starting at zero) | |
615 | * | |
616 | * This technique was originally described in | |
617 | * Hale Landis's ATADRVR (www.ata-atapi.com), and | |
618 | * later found its way into the ATA/ATAPI spec. | |
619 | * | |
620 | * Write a pattern to the ATA shadow registers, | |
621 | * and if a device is present, it will respond by | |
622 | * correctly storing and echoing back the | |
623 | * ATA shadow register contents. | |
624 | * | |
625 | * LOCKING: | |
626 | * caller. | |
627 | */ | |
628 | ||
0d5ff566 | 629 | static unsigned int ata_devchk(struct ata_port *ap, unsigned int device) |
1da177e4 LT |
630 | { |
631 | struct ata_ioports *ioaddr = &ap->ioaddr; | |
632 | u8 nsect, lbal; | |
633 | ||
634 | ap->ops->dev_select(ap, device); | |
635 | ||
0d5ff566 TH |
636 | iowrite8(0x55, ioaddr->nsect_addr); |
637 | iowrite8(0xaa, ioaddr->lbal_addr); | |
1da177e4 | 638 | |
0d5ff566 TH |
639 | iowrite8(0xaa, ioaddr->nsect_addr); |
640 | iowrite8(0x55, ioaddr->lbal_addr); | |
1da177e4 | 641 | |
0d5ff566 TH |
642 | iowrite8(0x55, ioaddr->nsect_addr); |
643 | iowrite8(0xaa, ioaddr->lbal_addr); | |
1da177e4 | 644 | |
0d5ff566 TH |
645 | nsect = ioread8(ioaddr->nsect_addr); |
646 | lbal = ioread8(ioaddr->lbal_addr); | |
1da177e4 LT |
647 | |
648 | if ((nsect == 0x55) && (lbal == 0xaa)) | |
649 | return 1; /* we found a device */ | |
650 | ||
651 | return 0; /* nothing found */ | |
652 | } | |
653 | ||
1da177e4 LT |
654 | /** |
655 | * ata_dev_classify - determine device type based on ATA-spec signature | |
656 | * @tf: ATA taskfile register set for device to be identified | |
657 | * | |
658 | * Determine from taskfile register contents whether a device is | |
659 | * ATA or ATAPI, as per "Signature and persistence" section | |
660 | * of ATA/PI spec (volume 1, sect 5.14). | |
661 | * | |
662 | * LOCKING: | |
663 | * None. | |
664 | * | |
665 | * RETURNS: | |
666 | * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, or %ATA_DEV_UNKNOWN | |
667 | * the event of failure. | |
668 | */ | |
669 | ||
057ace5e | 670 | unsigned int ata_dev_classify(const struct ata_taskfile *tf) |
1da177e4 LT |
671 | { |
672 | /* Apple's open source Darwin code hints that some devices only | |
673 | * put a proper signature into the LBA mid/high registers, | |
674 | * So, we only check those. It's sufficient for uniqueness. | |
675 | */ | |
676 | ||
677 | if (((tf->lbam == 0) && (tf->lbah == 0)) || | |
678 | ((tf->lbam == 0x3c) && (tf->lbah == 0xc3))) { | |
679 | DPRINTK("found ATA device by sig\n"); | |
680 | return ATA_DEV_ATA; | |
681 | } | |
682 | ||
683 | if (((tf->lbam == 0x14) && (tf->lbah == 0xeb)) || | |
684 | ((tf->lbam == 0x69) && (tf->lbah == 0x96))) { | |
685 | DPRINTK("found ATAPI device by sig\n"); | |
686 | return ATA_DEV_ATAPI; | |
687 | } | |
688 | ||
689 | DPRINTK("unknown device\n"); | |
690 | return ATA_DEV_UNKNOWN; | |
691 | } | |
692 | ||
693 | /** | |
694 | * ata_dev_try_classify - Parse returned ATA device signature | |
695 | * @ap: ATA channel to examine | |
696 | * @device: Device to examine (starting at zero) | |
b4dc7623 | 697 | * @r_err: Value of error register on completion |
1da177e4 LT |
698 | * |
699 | * After an event -- SRST, E.D.D., or SATA COMRESET -- occurs, | |
700 | * an ATA/ATAPI-defined set of values is placed in the ATA | |
701 | * shadow registers, indicating the results of device detection | |
702 | * and diagnostics. | |
703 | * | |
704 | * Select the ATA device, and read the values from the ATA shadow | |
705 | * registers. Then parse according to the Error register value, | |
706 | * and the spec-defined values examined by ata_dev_classify(). | |
707 | * | |
708 | * LOCKING: | |
709 | * caller. | |
b4dc7623 TH |
710 | * |
711 | * RETURNS: | |
712 | * Device type - %ATA_DEV_ATA, %ATA_DEV_ATAPI or %ATA_DEV_NONE. | |
1da177e4 LT |
713 | */ |
714 | ||
a619f981 | 715 | unsigned int |
b4dc7623 | 716 | ata_dev_try_classify(struct ata_port *ap, unsigned int device, u8 *r_err) |
1da177e4 | 717 | { |
1da177e4 LT |
718 | struct ata_taskfile tf; |
719 | unsigned int class; | |
720 | u8 err; | |
721 | ||
722 | ap->ops->dev_select(ap, device); | |
723 | ||
724 | memset(&tf, 0, sizeof(tf)); | |
725 | ||
1da177e4 | 726 | ap->ops->tf_read(ap, &tf); |
0169e284 | 727 | err = tf.feature; |
b4dc7623 TH |
728 | if (r_err) |
729 | *r_err = err; | |
1da177e4 | 730 | |
93590859 AC |
731 | /* see if device passed diags: if master then continue and warn later */ |
732 | if (err == 0 && device == 0) | |
733 | /* diagnostic fail : do nothing _YET_ */ | |
734 | ap->device[device].horkage |= ATA_HORKAGE_DIAGNOSTIC; | |
735 | else if (err == 1) | |
1da177e4 LT |
736 | /* do nothing */ ; |
737 | else if ((device == 0) && (err == 0x81)) | |
738 | /* do nothing */ ; | |
739 | else | |
b4dc7623 | 740 | return ATA_DEV_NONE; |
1da177e4 | 741 | |
b4dc7623 | 742 | /* determine if device is ATA or ATAPI */ |
1da177e4 | 743 | class = ata_dev_classify(&tf); |
b4dc7623 | 744 | |
1da177e4 | 745 | if (class == ATA_DEV_UNKNOWN) |
b4dc7623 | 746 | return ATA_DEV_NONE; |
1da177e4 | 747 | if ((class == ATA_DEV_ATA) && (ata_chk_status(ap) == 0)) |
b4dc7623 TH |
748 | return ATA_DEV_NONE; |
749 | return class; | |
1da177e4 LT |
750 | } |
751 | ||
752 | /** | |
6a62a04d | 753 | * ata_id_string - Convert IDENTIFY DEVICE page into string |
1da177e4 LT |
754 | * @id: IDENTIFY DEVICE results we will examine |
755 | * @s: string into which data is output | |
756 | * @ofs: offset into identify device page | |
757 | * @len: length of string to return. must be an even number. | |
758 | * | |
759 | * The strings in the IDENTIFY DEVICE page are broken up into | |
760 | * 16-bit chunks. Run through the string, and output each | |
761 | * 8-bit chunk linearly, regardless of platform. | |
762 | * | |
763 | * LOCKING: | |
764 | * caller. | |
765 | */ | |
766 | ||
6a62a04d TH |
767 | void ata_id_string(const u16 *id, unsigned char *s, |
768 | unsigned int ofs, unsigned int len) | |
1da177e4 LT |
769 | { |
770 | unsigned int c; | |
771 | ||
772 | while (len > 0) { | |
773 | c = id[ofs] >> 8; | |
774 | *s = c; | |
775 | s++; | |
776 | ||
777 | c = id[ofs] & 0xff; | |
778 | *s = c; | |
779 | s++; | |
780 | ||
781 | ofs++; | |
782 | len -= 2; | |
783 | } | |
784 | } | |
785 | ||
0e949ff3 | 786 | /** |
6a62a04d | 787 | * ata_id_c_string - Convert IDENTIFY DEVICE page into C string |
0e949ff3 TH |
788 | * @id: IDENTIFY DEVICE results we will examine |
789 | * @s: string into which data is output | |
790 | * @ofs: offset into identify device page | |
791 | * @len: length of string to return. must be an odd number. | |
792 | * | |
6a62a04d | 793 | * This function is identical to ata_id_string except that it |
0e949ff3 TH |
794 | * trims trailing spaces and terminates the resulting string with |
795 | * null. @len must be actual maximum length (even number) + 1. | |
796 | * | |
797 | * LOCKING: | |
798 | * caller. | |
799 | */ | |
6a62a04d TH |
800 | void ata_id_c_string(const u16 *id, unsigned char *s, |
801 | unsigned int ofs, unsigned int len) | |
0e949ff3 TH |
802 | { |
803 | unsigned char *p; | |
804 | ||
805 | WARN_ON(!(len & 1)); | |
806 | ||
6a62a04d | 807 | ata_id_string(id, s, ofs, len - 1); |
0e949ff3 TH |
808 | |
809 | p = s + strnlen(s, len - 1); | |
810 | while (p > s && p[-1] == ' ') | |
811 | p--; | |
812 | *p = '\0'; | |
813 | } | |
0baab86b | 814 | |
1e999736 AC |
815 | static u64 ata_tf_to_lba48(struct ata_taskfile *tf) |
816 | { | |
817 | u64 sectors = 0; | |
818 | ||
819 | sectors |= ((u64)(tf->hob_lbah & 0xff)) << 40; | |
820 | sectors |= ((u64)(tf->hob_lbam & 0xff)) << 32; | |
821 | sectors |= (tf->hob_lbal & 0xff) << 24; | |
822 | sectors |= (tf->lbah & 0xff) << 16; | |
823 | sectors |= (tf->lbam & 0xff) << 8; | |
824 | sectors |= (tf->lbal & 0xff); | |
825 | ||
826 | return ++sectors; | |
827 | } | |
828 | ||
829 | static u64 ata_tf_to_lba(struct ata_taskfile *tf) | |
830 | { | |
831 | u64 sectors = 0; | |
832 | ||
833 | sectors |= (tf->device & 0x0f) << 24; | |
834 | sectors |= (tf->lbah & 0xff) << 16; | |
835 | sectors |= (tf->lbam & 0xff) << 8; | |
836 | sectors |= (tf->lbal & 0xff); | |
837 | ||
838 | return ++sectors; | |
839 | } | |
840 | ||
841 | /** | |
842 | * ata_read_native_max_address_ext - LBA48 native max query | |
843 | * @dev: Device to query | |
844 | * | |
845 | * Perform an LBA48 size query upon the device in question. Return the | |
846 | * actual LBA48 size or zero if the command fails. | |
847 | */ | |
848 | ||
849 | static u64 ata_read_native_max_address_ext(struct ata_device *dev) | |
850 | { | |
851 | unsigned int err; | |
852 | struct ata_taskfile tf; | |
853 | ||
854 | ata_tf_init(dev, &tf); | |
855 | ||
856 | tf.command = ATA_CMD_READ_NATIVE_MAX_EXT; | |
857 | tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48 | ATA_TFLAG_ISADDR; | |
858 | tf.protocol |= ATA_PROT_NODATA; | |
859 | tf.device |= 0x40; | |
860 | ||
861 | err = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0); | |
862 | if (err) | |
863 | return 0; | |
864 | ||
865 | return ata_tf_to_lba48(&tf); | |
866 | } | |
867 | ||
868 | /** | |
869 | * ata_read_native_max_address - LBA28 native max query | |
870 | * @dev: Device to query | |
871 | * | |
872 | * Performa an LBA28 size query upon the device in question. Return the | |
873 | * actual LBA28 size or zero if the command fails. | |
874 | */ | |
875 | ||
876 | static u64 ata_read_native_max_address(struct ata_device *dev) | |
877 | { | |
878 | unsigned int err; | |
879 | struct ata_taskfile tf; | |
880 | ||
881 | ata_tf_init(dev, &tf); | |
882 | ||
883 | tf.command = ATA_CMD_READ_NATIVE_MAX; | |
884 | tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; | |
885 | tf.protocol |= ATA_PROT_NODATA; | |
886 | tf.device |= 0x40; | |
887 | ||
888 | err = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0); | |
889 | if (err) | |
890 | return 0; | |
891 | ||
892 | return ata_tf_to_lba(&tf); | |
893 | } | |
894 | ||
895 | /** | |
896 | * ata_set_native_max_address_ext - LBA48 native max set | |
897 | * @dev: Device to query | |
898 | * | |
899 | * Perform an LBA48 size set max upon the device in question. Return the | |
900 | * actual LBA48 size or zero if the command fails. | |
901 | */ | |
902 | ||
903 | static u64 ata_set_native_max_address_ext(struct ata_device *dev, u64 new_sectors) | |
904 | { | |
905 | unsigned int err; | |
906 | struct ata_taskfile tf; | |
907 | ||
908 | new_sectors--; | |
909 | ||
910 | ata_tf_init(dev, &tf); | |
911 | ||
912 | tf.command = ATA_CMD_SET_MAX_EXT; | |
913 | tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48 | ATA_TFLAG_ISADDR; | |
914 | tf.protocol |= ATA_PROT_NODATA; | |
915 | tf.device |= 0x40; | |
916 | ||
917 | tf.lbal = (new_sectors >> 0) & 0xff; | |
918 | tf.lbam = (new_sectors >> 8) & 0xff; | |
919 | tf.lbah = (new_sectors >> 16) & 0xff; | |
920 | ||
921 | tf.hob_lbal = (new_sectors >> 24) & 0xff; | |
922 | tf.hob_lbam = (new_sectors >> 32) & 0xff; | |
923 | tf.hob_lbah = (new_sectors >> 40) & 0xff; | |
924 | ||
925 | err = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0); | |
926 | if (err) | |
927 | return 0; | |
928 | ||
929 | return ata_tf_to_lba48(&tf); | |
930 | } | |
931 | ||
932 | /** | |
933 | * ata_set_native_max_address - LBA28 native max set | |
934 | * @dev: Device to query | |
935 | * | |
936 | * Perform an LBA28 size set max upon the device in question. Return the | |
937 | * actual LBA28 size or zero if the command fails. | |
938 | */ | |
939 | ||
940 | static u64 ata_set_native_max_address(struct ata_device *dev, u64 new_sectors) | |
941 | { | |
942 | unsigned int err; | |
943 | struct ata_taskfile tf; | |
944 | ||
945 | new_sectors--; | |
946 | ||
947 | ata_tf_init(dev, &tf); | |
948 | ||
949 | tf.command = ATA_CMD_SET_MAX; | |
950 | tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; | |
951 | tf.protocol |= ATA_PROT_NODATA; | |
952 | ||
953 | tf.lbal = (new_sectors >> 0) & 0xff; | |
954 | tf.lbam = (new_sectors >> 8) & 0xff; | |
955 | tf.lbah = (new_sectors >> 16) & 0xff; | |
956 | tf.device |= ((new_sectors >> 24) & 0x0f) | 0x40; | |
957 | ||
958 | err = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0); | |
959 | if (err) | |
960 | return 0; | |
961 | ||
962 | return ata_tf_to_lba(&tf); | |
963 | } | |
964 | ||
965 | /** | |
966 | * ata_hpa_resize - Resize a device with an HPA set | |
967 | * @dev: Device to resize | |
968 | * | |
969 | * Read the size of an LBA28 or LBA48 disk with HPA features and resize | |
970 | * it if required to the full size of the media. The caller must check | |
971 | * the drive has the HPA feature set enabled. | |
972 | */ | |
973 | ||
974 | static u64 ata_hpa_resize(struct ata_device *dev) | |
975 | { | |
976 | u64 sectors = dev->n_sectors; | |
977 | u64 hpa_sectors; | |
978 | ||
979 | if (ata_id_has_lba48(dev->id)) | |
980 | hpa_sectors = ata_read_native_max_address_ext(dev); | |
981 | else | |
982 | hpa_sectors = ata_read_native_max_address(dev); | |
983 | ||
984 | /* if no hpa, both should be equal */ | |
985 | ata_dev_printk(dev, KERN_INFO, "%s 1: sectors = %lld, hpa_sectors = %lld\n", | |
986 | __FUNCTION__, sectors, hpa_sectors); | |
987 | ||
988 | if (hpa_sectors > sectors) { | |
989 | ata_dev_printk(dev, KERN_INFO, | |
990 | "Host Protected Area detected:\n" | |
991 | "\tcurrent size: %lld sectors\n" | |
992 | "\tnative size: %lld sectors\n", | |
993 | sectors, hpa_sectors); | |
994 | ||
995 | if (ata_ignore_hpa) { | |
996 | if (ata_id_has_lba48(dev->id)) | |
997 | hpa_sectors = ata_set_native_max_address_ext(dev, hpa_sectors); | |
998 | else | |
999 | hpa_sectors = ata_set_native_max_address(dev, hpa_sectors); | |
1000 | ||
1001 | if (hpa_sectors) { | |
1002 | ata_dev_printk(dev, KERN_INFO, | |
1003 | "native size increased to %lld sectors\n", hpa_sectors); | |
1004 | return hpa_sectors; | |
1005 | } | |
1006 | } | |
1007 | } | |
1008 | return sectors; | |
1009 | } | |
1010 | ||
2940740b TH |
1011 | static u64 ata_id_n_sectors(const u16 *id) |
1012 | { | |
1013 | if (ata_id_has_lba(id)) { | |
1014 | if (ata_id_has_lba48(id)) | |
1015 | return ata_id_u64(id, 100); | |
1016 | else | |
1017 | return ata_id_u32(id, 60); | |
1018 | } else { | |
1019 | if (ata_id_current_chs_valid(id)) | |
1020 | return ata_id_u32(id, 57); | |
1021 | else | |
1022 | return id[1] * id[3] * id[6]; | |
1023 | } | |
1024 | } | |
1025 | ||
10305f0f A |
1026 | /** |
1027 | * ata_id_to_dma_mode - Identify DMA mode from id block | |
1028 | * @dev: device to identify | |
cc261267 | 1029 | * @unknown: mode to assume if we cannot tell |
10305f0f A |
1030 | * |
1031 | * Set up the timing values for the device based upon the identify | |
1032 | * reported values for the DMA mode. This function is used by drivers | |
1033 | * which rely upon firmware configured modes, but wish to report the | |
1034 | * mode correctly when possible. | |
1035 | * | |
1036 | * In addition we emit similarly formatted messages to the default | |
1037 | * ata_dev_set_mode handler, in order to provide consistency of | |
1038 | * presentation. | |
1039 | */ | |
1040 | ||
1041 | void ata_id_to_dma_mode(struct ata_device *dev, u8 unknown) | |
1042 | { | |
1043 | unsigned int mask; | |
1044 | u8 mode; | |
1045 | ||
1046 | /* Pack the DMA modes */ | |
1047 | mask = ((dev->id[63] >> 8) << ATA_SHIFT_MWDMA) & ATA_MASK_MWDMA; | |
1048 | if (dev->id[53] & 0x04) | |
1049 | mask |= ((dev->id[88] >> 8) << ATA_SHIFT_UDMA) & ATA_MASK_UDMA; | |
1050 | ||
1051 | /* Select the mode in use */ | |
1052 | mode = ata_xfer_mask2mode(mask); | |
1053 | ||
1054 | if (mode != 0) { | |
1055 | ata_dev_printk(dev, KERN_INFO, "configured for %s\n", | |
1056 | ata_mode_string(mask)); | |
1057 | } else { | |
1058 | /* SWDMA perhaps ? */ | |
1059 | mode = unknown; | |
1060 | ata_dev_printk(dev, KERN_INFO, "configured for DMA\n"); | |
1061 | } | |
1062 | ||
1063 | /* Configure the device reporting */ | |
1064 | dev->xfer_mode = mode; | |
1065 | dev->xfer_shift = ata_xfer_mode2shift(mode); | |
1066 | } | |
1067 | ||
0baab86b EF |
1068 | /** |
1069 | * ata_noop_dev_select - Select device 0/1 on ATA bus | |
1070 | * @ap: ATA channel to manipulate | |
1071 | * @device: ATA device (numbered from zero) to select | |
1072 | * | |
1073 | * This function performs no actual function. | |
1074 | * | |
1075 | * May be used as the dev_select() entry in ata_port_operations. | |
1076 | * | |
1077 | * LOCKING: | |
1078 | * caller. | |
1079 | */ | |
1da177e4 LT |
1080 | void ata_noop_dev_select (struct ata_port *ap, unsigned int device) |
1081 | { | |
1082 | } | |
1083 | ||
0baab86b | 1084 | |
1da177e4 LT |
1085 | /** |
1086 | * ata_std_dev_select - Select device 0/1 on ATA bus | |
1087 | * @ap: ATA channel to manipulate | |
1088 | * @device: ATA device (numbered from zero) to select | |
1089 | * | |
1090 | * Use the method defined in the ATA specification to | |
1091 | * make either device 0, or device 1, active on the | |
0baab86b EF |
1092 | * ATA channel. Works with both PIO and MMIO. |
1093 | * | |
1094 | * May be used as the dev_select() entry in ata_port_operations. | |
1da177e4 LT |
1095 | * |
1096 | * LOCKING: | |
1097 | * caller. | |
1098 | */ | |
1099 | ||
1100 | void ata_std_dev_select (struct ata_port *ap, unsigned int device) | |
1101 | { | |
1102 | u8 tmp; | |
1103 | ||
1104 | if (device == 0) | |
1105 | tmp = ATA_DEVICE_OBS; | |
1106 | else | |
1107 | tmp = ATA_DEVICE_OBS | ATA_DEV1; | |
1108 | ||
0d5ff566 | 1109 | iowrite8(tmp, ap->ioaddr.device_addr); |
1da177e4 LT |
1110 | ata_pause(ap); /* needed; also flushes, for mmio */ |
1111 | } | |
1112 | ||
1113 | /** | |
1114 | * ata_dev_select - Select device 0/1 on ATA bus | |
1115 | * @ap: ATA channel to manipulate | |
1116 | * @device: ATA device (numbered from zero) to select | |
1117 | * @wait: non-zero to wait for Status register BSY bit to clear | |
1118 | * @can_sleep: non-zero if context allows sleeping | |
1119 | * | |
1120 | * Use the method defined in the ATA specification to | |
1121 | * make either device 0, or device 1, active on the | |
1122 | * ATA channel. | |
1123 | * | |
1124 | * This is a high-level version of ata_std_dev_select(), | |
1125 | * which additionally provides the services of inserting | |
1126 | * the proper pauses and status polling, where needed. | |
1127 | * | |
1128 | * LOCKING: | |
1129 | * caller. | |
1130 | */ | |
1131 | ||
1132 | void ata_dev_select(struct ata_port *ap, unsigned int device, | |
1133 | unsigned int wait, unsigned int can_sleep) | |
1134 | { | |
88574551 | 1135 | if (ata_msg_probe(ap)) |
44877b4e TH |
1136 | ata_port_printk(ap, KERN_INFO, "ata_dev_select: ENTER, " |
1137 | "device %u, wait %u\n", device, wait); | |
1da177e4 LT |
1138 | |
1139 | if (wait) | |
1140 | ata_wait_idle(ap); | |
1141 | ||
1142 | ap->ops->dev_select(ap, device); | |
1143 | ||
1144 | if (wait) { | |
1145 | if (can_sleep && ap->device[device].class == ATA_DEV_ATAPI) | |
1146 | msleep(150); | |
1147 | ata_wait_idle(ap); | |
1148 | } | |
1149 | } | |
1150 | ||
1151 | /** | |
1152 | * ata_dump_id - IDENTIFY DEVICE info debugging output | |
0bd3300a | 1153 | * @id: IDENTIFY DEVICE page to dump |
1da177e4 | 1154 | * |
0bd3300a TH |
1155 | * Dump selected 16-bit words from the given IDENTIFY DEVICE |
1156 | * page. | |
1da177e4 LT |
1157 | * |
1158 | * LOCKING: | |
1159 | * caller. | |
1160 | */ | |
1161 | ||
0bd3300a | 1162 | static inline void ata_dump_id(const u16 *id) |
1da177e4 LT |
1163 | { |
1164 | DPRINTK("49==0x%04x " | |
1165 | "53==0x%04x " | |
1166 | "63==0x%04x " | |
1167 | "64==0x%04x " | |
1168 | "75==0x%04x \n", | |
0bd3300a TH |
1169 | id[49], |
1170 | id[53], | |
1171 | id[63], | |
1172 | id[64], | |
1173 | id[75]); | |
1da177e4 LT |
1174 | DPRINTK("80==0x%04x " |
1175 | "81==0x%04x " | |
1176 | "82==0x%04x " | |
1177 | "83==0x%04x " | |
1178 | "84==0x%04x \n", | |
0bd3300a TH |
1179 | id[80], |
1180 | id[81], | |
1181 | id[82], | |
1182 | id[83], | |
1183 | id[84]); | |
1da177e4 LT |
1184 | DPRINTK("88==0x%04x " |
1185 | "93==0x%04x\n", | |
0bd3300a TH |
1186 | id[88], |
1187 | id[93]); | |
1da177e4 LT |
1188 | } |
1189 | ||
cb95d562 TH |
1190 | /** |
1191 | * ata_id_xfermask - Compute xfermask from the given IDENTIFY data | |
1192 | * @id: IDENTIFY data to compute xfer mask from | |
1193 | * | |
1194 | * Compute the xfermask for this device. This is not as trivial | |
1195 | * as it seems if we must consider early devices correctly. | |
1196 | * | |
1197 | * FIXME: pre IDE drive timing (do we care ?). | |
1198 | * | |
1199 | * LOCKING: | |
1200 | * None. | |
1201 | * | |
1202 | * RETURNS: | |
1203 | * Computed xfermask | |
1204 | */ | |
1205 | static unsigned int ata_id_xfermask(const u16 *id) | |
1206 | { | |
1207 | unsigned int pio_mask, mwdma_mask, udma_mask; | |
1208 | ||
1209 | /* Usual case. Word 53 indicates word 64 is valid */ | |
1210 | if (id[ATA_ID_FIELD_VALID] & (1 << 1)) { | |
1211 | pio_mask = id[ATA_ID_PIO_MODES] & 0x03; | |
1212 | pio_mask <<= 3; | |
1213 | pio_mask |= 0x7; | |
1214 | } else { | |
1215 | /* If word 64 isn't valid then Word 51 high byte holds | |
1216 | * the PIO timing number for the maximum. Turn it into | |
1217 | * a mask. | |
1218 | */ | |
7a0f1c8a | 1219 | u8 mode = (id[ATA_ID_OLD_PIO_MODES] >> 8) & 0xFF; |
46767aeb AC |
1220 | if (mode < 5) /* Valid PIO range */ |
1221 | pio_mask = (2 << mode) - 1; | |
1222 | else | |
1223 | pio_mask = 1; | |
cb95d562 TH |
1224 | |
1225 | /* But wait.. there's more. Design your standards by | |
1226 | * committee and you too can get a free iordy field to | |
1227 | * process. However its the speeds not the modes that | |
1228 | * are supported... Note drivers using the timing API | |
1229 | * will get this right anyway | |
1230 | */ | |
1231 | } | |
1232 | ||
1233 | mwdma_mask = id[ATA_ID_MWDMA_MODES] & 0x07; | |
fb21f0d0 | 1234 | |
b352e57d AC |
1235 | if (ata_id_is_cfa(id)) { |
1236 | /* | |
1237 | * Process compact flash extended modes | |
1238 | */ | |
1239 | int pio = id[163] & 0x7; | |
1240 | int dma = (id[163] >> 3) & 7; | |
1241 | ||
1242 | if (pio) | |
1243 | pio_mask |= (1 << 5); | |
1244 | if (pio > 1) | |
1245 | pio_mask |= (1 << 6); | |
1246 | if (dma) | |
1247 | mwdma_mask |= (1 << 3); | |
1248 | if (dma > 1) | |
1249 | mwdma_mask |= (1 << 4); | |
1250 | } | |
1251 | ||
fb21f0d0 TH |
1252 | udma_mask = 0; |
1253 | if (id[ATA_ID_FIELD_VALID] & (1 << 2)) | |
1254 | udma_mask = id[ATA_ID_UDMA_MODES] & 0xff; | |
cb95d562 TH |
1255 | |
1256 | return ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask); | |
1257 | } | |
1258 | ||
86e45b6b TH |
1259 | /** |
1260 | * ata_port_queue_task - Queue port_task | |
1261 | * @ap: The ata_port to queue port_task for | |
e2a7f77a | 1262 | * @fn: workqueue function to be scheduled |
65f27f38 | 1263 | * @data: data for @fn to use |
e2a7f77a | 1264 | * @delay: delay time for workqueue function |
86e45b6b TH |
1265 | * |
1266 | * Schedule @fn(@data) for execution after @delay jiffies using | |
1267 | * port_task. There is one port_task per port and it's the | |
1268 | * user(low level driver)'s responsibility to make sure that only | |
1269 | * one task is active at any given time. | |
1270 | * | |
1271 | * libata core layer takes care of synchronization between | |
1272 | * port_task and EH. ata_port_queue_task() may be ignored for EH | |
1273 | * synchronization. | |
1274 | * | |
1275 | * LOCKING: | |
1276 | * Inherited from caller. | |
1277 | */ | |
65f27f38 | 1278 | void ata_port_queue_task(struct ata_port *ap, work_func_t fn, void *data, |
86e45b6b TH |
1279 | unsigned long delay) |
1280 | { | |
1281 | int rc; | |
1282 | ||
b51e9e5d | 1283 | if (ap->pflags & ATA_PFLAG_FLUSH_PORT_TASK) |
86e45b6b TH |
1284 | return; |
1285 | ||
65f27f38 DH |
1286 | PREPARE_DELAYED_WORK(&ap->port_task, fn); |
1287 | ap->port_task_data = data; | |
86e45b6b | 1288 | |
52bad64d | 1289 | rc = queue_delayed_work(ata_wq, &ap->port_task, delay); |
86e45b6b TH |
1290 | |
1291 | /* rc == 0 means that another user is using port task */ | |
1292 | WARN_ON(rc == 0); | |
1293 | } | |
1294 | ||
1295 | /** | |
1296 | * ata_port_flush_task - Flush port_task | |
1297 | * @ap: The ata_port to flush port_task for | |
1298 | * | |
1299 | * After this function completes, port_task is guranteed not to | |
1300 | * be running or scheduled. | |
1301 | * | |
1302 | * LOCKING: | |
1303 | * Kernel thread context (may sleep) | |
1304 | */ | |
1305 | void ata_port_flush_task(struct ata_port *ap) | |
1306 | { | |
1307 | unsigned long flags; | |
1308 | ||
1309 | DPRINTK("ENTER\n"); | |
1310 | ||
ba6a1308 | 1311 | spin_lock_irqsave(ap->lock, flags); |
b51e9e5d | 1312 | ap->pflags |= ATA_PFLAG_FLUSH_PORT_TASK; |
ba6a1308 | 1313 | spin_unlock_irqrestore(ap->lock, flags); |
86e45b6b TH |
1314 | |
1315 | DPRINTK("flush #1\n"); | |
1316 | flush_workqueue(ata_wq); | |
1317 | ||
1318 | /* | |
1319 | * At this point, if a task is running, it's guaranteed to see | |
1320 | * the FLUSH flag; thus, it will never queue pio tasks again. | |
1321 | * Cancel and flush. | |
1322 | */ | |
1323 | if (!cancel_delayed_work(&ap->port_task)) { | |
0dd4b21f | 1324 | if (ata_msg_ctl(ap)) |
88574551 TH |
1325 | ata_port_printk(ap, KERN_DEBUG, "%s: flush #2\n", |
1326 | __FUNCTION__); | |
86e45b6b TH |
1327 | flush_workqueue(ata_wq); |
1328 | } | |
1329 | ||
ba6a1308 | 1330 | spin_lock_irqsave(ap->lock, flags); |
b51e9e5d | 1331 | ap->pflags &= ~ATA_PFLAG_FLUSH_PORT_TASK; |
ba6a1308 | 1332 | spin_unlock_irqrestore(ap->lock, flags); |
86e45b6b | 1333 | |
0dd4b21f BP |
1334 | if (ata_msg_ctl(ap)) |
1335 | ata_port_printk(ap, KERN_DEBUG, "%s: EXIT\n", __FUNCTION__); | |
86e45b6b TH |
1336 | } |
1337 | ||
7102d230 | 1338 | static void ata_qc_complete_internal(struct ata_queued_cmd *qc) |
a2a7a662 | 1339 | { |
77853bf2 | 1340 | struct completion *waiting = qc->private_data; |
a2a7a662 | 1341 | |
a2a7a662 | 1342 | complete(waiting); |
a2a7a662 TH |
1343 | } |
1344 | ||
1345 | /** | |
2432697b | 1346 | * ata_exec_internal_sg - execute libata internal command |
a2a7a662 TH |
1347 | * @dev: Device to which the command is sent |
1348 | * @tf: Taskfile registers for the command and the result | |
d69cf37d | 1349 | * @cdb: CDB for packet command |
a2a7a662 | 1350 | * @dma_dir: Data tranfer direction of the command |
2432697b TH |
1351 | * @sg: sg list for the data buffer of the command |
1352 | * @n_elem: Number of sg entries | |
a2a7a662 TH |
1353 | * |
1354 | * Executes libata internal command with timeout. @tf contains | |
1355 | * command on entry and result on return. Timeout and error | |
1356 | * conditions are reported via return value. No recovery action | |
1357 | * is taken after a command times out. It's caller's duty to | |
1358 | * clean up after timeout. | |
1359 | * | |
1360 | * LOCKING: | |
1361 | * None. Should be called with kernel context, might sleep. | |
551e8889 TH |
1362 | * |
1363 | * RETURNS: | |
1364 | * Zero on success, AC_ERR_* mask on failure | |
a2a7a662 | 1365 | */ |
2432697b TH |
1366 | unsigned ata_exec_internal_sg(struct ata_device *dev, |
1367 | struct ata_taskfile *tf, const u8 *cdb, | |
1368 | int dma_dir, struct scatterlist *sg, | |
1369 | unsigned int n_elem) | |
a2a7a662 | 1370 | { |
3373efd8 | 1371 | struct ata_port *ap = dev->ap; |
a2a7a662 TH |
1372 | u8 command = tf->command; |
1373 | struct ata_queued_cmd *qc; | |
2ab7db1f | 1374 | unsigned int tag, preempted_tag; |
dedaf2b0 | 1375 | u32 preempted_sactive, preempted_qc_active; |
60be6b9a | 1376 | DECLARE_COMPLETION_ONSTACK(wait); |
a2a7a662 | 1377 | unsigned long flags; |
77853bf2 | 1378 | unsigned int err_mask; |
d95a717f | 1379 | int rc; |
a2a7a662 | 1380 | |
ba6a1308 | 1381 | spin_lock_irqsave(ap->lock, flags); |
a2a7a662 | 1382 | |
e3180499 | 1383 | /* no internal command while frozen */ |
b51e9e5d | 1384 | if (ap->pflags & ATA_PFLAG_FROZEN) { |
ba6a1308 | 1385 | spin_unlock_irqrestore(ap->lock, flags); |
e3180499 TH |
1386 | return AC_ERR_SYSTEM; |
1387 | } | |
1388 | ||
2ab7db1f | 1389 | /* initialize internal qc */ |
a2a7a662 | 1390 | |
2ab7db1f TH |
1391 | /* XXX: Tag 0 is used for drivers with legacy EH as some |
1392 | * drivers choke if any other tag is given. This breaks | |
1393 | * ata_tag_internal() test for those drivers. Don't use new | |
1394 | * EH stuff without converting to it. | |
1395 | */ | |
1396 | if (ap->ops->error_handler) | |
1397 | tag = ATA_TAG_INTERNAL; | |
1398 | else | |
1399 | tag = 0; | |
1400 | ||
6cec4a39 | 1401 | if (test_and_set_bit(tag, &ap->qc_allocated)) |
2ab7db1f | 1402 | BUG(); |
f69499f4 | 1403 | qc = __ata_qc_from_tag(ap, tag); |
2ab7db1f TH |
1404 | |
1405 | qc->tag = tag; | |
1406 | qc->scsicmd = NULL; | |
1407 | qc->ap = ap; | |
1408 | qc->dev = dev; | |
1409 | ata_qc_reinit(qc); | |
1410 | ||
1411 | preempted_tag = ap->active_tag; | |
dedaf2b0 TH |
1412 | preempted_sactive = ap->sactive; |
1413 | preempted_qc_active = ap->qc_active; | |
2ab7db1f | 1414 | ap->active_tag = ATA_TAG_POISON; |
dedaf2b0 TH |
1415 | ap->sactive = 0; |
1416 | ap->qc_active = 0; | |
2ab7db1f TH |
1417 | |
1418 | /* prepare & issue qc */ | |
a2a7a662 | 1419 | qc->tf = *tf; |
d69cf37d TH |
1420 | if (cdb) |
1421 | memcpy(qc->cdb, cdb, ATAPI_CDB_LEN); | |
e61e0672 | 1422 | qc->flags |= ATA_QCFLAG_RESULT_TF; |
a2a7a662 TH |
1423 | qc->dma_dir = dma_dir; |
1424 | if (dma_dir != DMA_NONE) { | |
2432697b TH |
1425 | unsigned int i, buflen = 0; |
1426 | ||
1427 | for (i = 0; i < n_elem; i++) | |
1428 | buflen += sg[i].length; | |
1429 | ||
1430 | ata_sg_init(qc, sg, n_elem); | |
49c80429 | 1431 | qc->nbytes = buflen; |
a2a7a662 TH |
1432 | } |
1433 | ||
77853bf2 | 1434 | qc->private_data = &wait; |
a2a7a662 TH |
1435 | qc->complete_fn = ata_qc_complete_internal; |
1436 | ||
8e0e694a | 1437 | ata_qc_issue(qc); |
a2a7a662 | 1438 | |
ba6a1308 | 1439 | spin_unlock_irqrestore(ap->lock, flags); |
a2a7a662 | 1440 | |
a8601e5f | 1441 | rc = wait_for_completion_timeout(&wait, ata_probe_timeout); |
d95a717f TH |
1442 | |
1443 | ata_port_flush_task(ap); | |
41ade50c | 1444 | |
d95a717f | 1445 | if (!rc) { |
ba6a1308 | 1446 | spin_lock_irqsave(ap->lock, flags); |
a2a7a662 TH |
1447 | |
1448 | /* We're racing with irq here. If we lose, the | |
1449 | * following test prevents us from completing the qc | |
d95a717f TH |
1450 | * twice. If we win, the port is frozen and will be |
1451 | * cleaned up by ->post_internal_cmd(). | |
a2a7a662 | 1452 | */ |
77853bf2 | 1453 | if (qc->flags & ATA_QCFLAG_ACTIVE) { |
d95a717f TH |
1454 | qc->err_mask |= AC_ERR_TIMEOUT; |
1455 | ||
1456 | if (ap->ops->error_handler) | |
1457 | ata_port_freeze(ap); | |
1458 | else | |
1459 | ata_qc_complete(qc); | |
f15a1daf | 1460 | |
0dd4b21f BP |
1461 | if (ata_msg_warn(ap)) |
1462 | ata_dev_printk(dev, KERN_WARNING, | |
88574551 | 1463 | "qc timeout (cmd 0x%x)\n", command); |
a2a7a662 TH |
1464 | } |
1465 | ||
ba6a1308 | 1466 | spin_unlock_irqrestore(ap->lock, flags); |
a2a7a662 TH |
1467 | } |
1468 | ||
d95a717f TH |
1469 | /* do post_internal_cmd */ |
1470 | if (ap->ops->post_internal_cmd) | |
1471 | ap->ops->post_internal_cmd(qc); | |
1472 | ||
a51d644a TH |
1473 | /* perform minimal error analysis */ |
1474 | if (qc->flags & ATA_QCFLAG_FAILED) { | |
1475 | if (qc->result_tf.command & (ATA_ERR | ATA_DF)) | |
1476 | qc->err_mask |= AC_ERR_DEV; | |
1477 | ||
1478 | if (!qc->err_mask) | |
1479 | qc->err_mask |= AC_ERR_OTHER; | |
1480 | ||
1481 | if (qc->err_mask & ~AC_ERR_OTHER) | |
1482 | qc->err_mask &= ~AC_ERR_OTHER; | |
d95a717f TH |
1483 | } |
1484 | ||
15869303 | 1485 | /* finish up */ |
ba6a1308 | 1486 | spin_lock_irqsave(ap->lock, flags); |
15869303 | 1487 | |
e61e0672 | 1488 | *tf = qc->result_tf; |
77853bf2 TH |
1489 | err_mask = qc->err_mask; |
1490 | ||
1491 | ata_qc_free(qc); | |
2ab7db1f | 1492 | ap->active_tag = preempted_tag; |
dedaf2b0 TH |
1493 | ap->sactive = preempted_sactive; |
1494 | ap->qc_active = preempted_qc_active; | |
77853bf2 | 1495 | |
1f7dd3e9 TH |
1496 | /* XXX - Some LLDDs (sata_mv) disable port on command failure. |
1497 | * Until those drivers are fixed, we detect the condition | |
1498 | * here, fail the command with AC_ERR_SYSTEM and reenable the | |
1499 | * port. | |
1500 | * | |
1501 | * Note that this doesn't change any behavior as internal | |
1502 | * command failure results in disabling the device in the | |
1503 | * higher layer for LLDDs without new reset/EH callbacks. | |
1504 | * | |
1505 | * Kill the following code as soon as those drivers are fixed. | |
1506 | */ | |
198e0fed | 1507 | if (ap->flags & ATA_FLAG_DISABLED) { |
1f7dd3e9 TH |
1508 | err_mask |= AC_ERR_SYSTEM; |
1509 | ata_port_probe(ap); | |
1510 | } | |
1511 | ||
ba6a1308 | 1512 | spin_unlock_irqrestore(ap->lock, flags); |
15869303 | 1513 | |
77853bf2 | 1514 | return err_mask; |
a2a7a662 TH |
1515 | } |
1516 | ||
2432697b | 1517 | /** |
33480a0e | 1518 | * ata_exec_internal - execute libata internal command |
2432697b TH |
1519 | * @dev: Device to which the command is sent |
1520 | * @tf: Taskfile registers for the command and the result | |
1521 | * @cdb: CDB for packet command | |
1522 | * @dma_dir: Data tranfer direction of the command | |
1523 | * @buf: Data buffer of the command | |
1524 | * @buflen: Length of data buffer | |
1525 | * | |
1526 | * Wrapper around ata_exec_internal_sg() which takes simple | |
1527 | * buffer instead of sg list. | |
1528 | * | |
1529 | * LOCKING: | |
1530 | * None. Should be called with kernel context, might sleep. | |
1531 | * | |
1532 | * RETURNS: | |
1533 | * Zero on success, AC_ERR_* mask on failure | |
1534 | */ | |
1535 | unsigned ata_exec_internal(struct ata_device *dev, | |
1536 | struct ata_taskfile *tf, const u8 *cdb, | |
1537 | int dma_dir, void *buf, unsigned int buflen) | |
1538 | { | |
33480a0e TH |
1539 | struct scatterlist *psg = NULL, sg; |
1540 | unsigned int n_elem = 0; | |
2432697b | 1541 | |
33480a0e TH |
1542 | if (dma_dir != DMA_NONE) { |
1543 | WARN_ON(!buf); | |
1544 | sg_init_one(&sg, buf, buflen); | |
1545 | psg = &sg; | |
1546 | n_elem++; | |
1547 | } | |
2432697b | 1548 | |
33480a0e | 1549 | return ata_exec_internal_sg(dev, tf, cdb, dma_dir, psg, n_elem); |
2432697b TH |
1550 | } |
1551 | ||
977e6b9f TH |
1552 | /** |
1553 | * ata_do_simple_cmd - execute simple internal command | |
1554 | * @dev: Device to which the command is sent | |
1555 | * @cmd: Opcode to execute | |
1556 | * | |
1557 | * Execute a 'simple' command, that only consists of the opcode | |
1558 | * 'cmd' itself, without filling any other registers | |
1559 | * | |
1560 | * LOCKING: | |
1561 | * Kernel thread context (may sleep). | |
1562 | * | |
1563 | * RETURNS: | |
1564 | * Zero on success, AC_ERR_* mask on failure | |
e58eb583 | 1565 | */ |
77b08fb5 | 1566 | unsigned int ata_do_simple_cmd(struct ata_device *dev, u8 cmd) |
e58eb583 TH |
1567 | { |
1568 | struct ata_taskfile tf; | |
e58eb583 TH |
1569 | |
1570 | ata_tf_init(dev, &tf); | |
1571 | ||
1572 | tf.command = cmd; | |
1573 | tf.flags |= ATA_TFLAG_DEVICE; | |
1574 | tf.protocol = ATA_PROT_NODATA; | |
1575 | ||
977e6b9f | 1576 | return ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0); |
e58eb583 TH |
1577 | } |
1578 | ||
1bc4ccff AC |
1579 | /** |
1580 | * ata_pio_need_iordy - check if iordy needed | |
1581 | * @adev: ATA device | |
1582 | * | |
1583 | * Check if the current speed of the device requires IORDY. Used | |
1584 | * by various controllers for chip configuration. | |
1585 | */ | |
432729f0 | 1586 | |
1bc4ccff AC |
1587 | unsigned int ata_pio_need_iordy(const struct ata_device *adev) |
1588 | { | |
432729f0 AC |
1589 | /* Controller doesn't support IORDY. Probably a pointless check |
1590 | as the caller should know this */ | |
1591 | if (adev->ap->flags & ATA_FLAG_NO_IORDY) | |
1bc4ccff | 1592 | return 0; |
432729f0 AC |
1593 | /* PIO3 and higher it is mandatory */ |
1594 | if (adev->pio_mode > XFER_PIO_2) | |
1595 | return 1; | |
1596 | /* We turn it on when possible */ | |
1597 | if (ata_id_has_iordy(adev->id)) | |
1bc4ccff | 1598 | return 1; |
432729f0 AC |
1599 | return 0; |
1600 | } | |
2e9edbf8 | 1601 | |
432729f0 AC |
1602 | /** |
1603 | * ata_pio_mask_no_iordy - Return the non IORDY mask | |
1604 | * @adev: ATA device | |
1605 | * | |
1606 | * Compute the highest mode possible if we are not using iordy. Return | |
1607 | * -1 if no iordy mode is available. | |
1608 | */ | |
1609 | ||
1610 | static u32 ata_pio_mask_no_iordy(const struct ata_device *adev) | |
1611 | { | |
1bc4ccff | 1612 | /* If we have no drive specific rule, then PIO 2 is non IORDY */ |
1bc4ccff | 1613 | if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE */ |
432729f0 | 1614 | u16 pio = adev->id[ATA_ID_EIDE_PIO]; |
1bc4ccff AC |
1615 | /* Is the speed faster than the drive allows non IORDY ? */ |
1616 | if (pio) { | |
1617 | /* This is cycle times not frequency - watch the logic! */ | |
1618 | if (pio > 240) /* PIO2 is 240nS per cycle */ | |
432729f0 AC |
1619 | return 3 << ATA_SHIFT_PIO; |
1620 | return 7 << ATA_SHIFT_PIO; | |
1bc4ccff AC |
1621 | } |
1622 | } | |
432729f0 | 1623 | return 3 << ATA_SHIFT_PIO; |
1bc4ccff AC |
1624 | } |
1625 | ||
1da177e4 | 1626 | /** |
49016aca | 1627 | * ata_dev_read_id - Read ID data from the specified device |
49016aca TH |
1628 | * @dev: target device |
1629 | * @p_class: pointer to class of the target device (may be changed) | |
bff04647 | 1630 | * @flags: ATA_READID_* flags |
fe635c7e | 1631 | * @id: buffer to read IDENTIFY data into |
1da177e4 | 1632 | * |
49016aca TH |
1633 | * Read ID data from the specified device. ATA_CMD_ID_ATA is |
1634 | * performed on ATA devices and ATA_CMD_ID_ATAPI on ATAPI | |
aec5c3c1 TH |
1635 | * devices. This function also issues ATA_CMD_INIT_DEV_PARAMS |
1636 | * for pre-ATA4 drives. | |
1da177e4 LT |
1637 | * |
1638 | * LOCKING: | |
49016aca TH |
1639 | * Kernel thread context (may sleep) |
1640 | * | |
1641 | * RETURNS: | |
1642 | * 0 on success, -errno otherwise. | |
1da177e4 | 1643 | */ |
a9beec95 | 1644 | int ata_dev_read_id(struct ata_device *dev, unsigned int *p_class, |
bff04647 | 1645 | unsigned int flags, u16 *id) |
1da177e4 | 1646 | { |
3373efd8 | 1647 | struct ata_port *ap = dev->ap; |
49016aca | 1648 | unsigned int class = *p_class; |
a0123703 | 1649 | struct ata_taskfile tf; |
49016aca TH |
1650 | unsigned int err_mask = 0; |
1651 | const char *reason; | |
1652 | int rc; | |
1da177e4 | 1653 | |
0dd4b21f | 1654 | if (ata_msg_ctl(ap)) |
44877b4e | 1655 | ata_dev_printk(dev, KERN_DEBUG, "%s: ENTER\n", __FUNCTION__); |
1da177e4 | 1656 | |
49016aca | 1657 | ata_dev_select(ap, dev->devno, 1, 1); /* select device 0/1 */ |
1da177e4 | 1658 | |
49016aca | 1659 | retry: |
3373efd8 | 1660 | ata_tf_init(dev, &tf); |
a0123703 | 1661 | |
49016aca TH |
1662 | switch (class) { |
1663 | case ATA_DEV_ATA: | |
a0123703 | 1664 | tf.command = ATA_CMD_ID_ATA; |
49016aca TH |
1665 | break; |
1666 | case ATA_DEV_ATAPI: | |
a0123703 | 1667 | tf.command = ATA_CMD_ID_ATAPI; |
49016aca TH |
1668 | break; |
1669 | default: | |
1670 | rc = -ENODEV; | |
1671 | reason = "unsupported class"; | |
1672 | goto err_out; | |
1da177e4 LT |
1673 | } |
1674 | ||
a0123703 | 1675 | tf.protocol = ATA_PROT_PIO; |
81afe893 TH |
1676 | |
1677 | /* Some devices choke if TF registers contain garbage. Make | |
1678 | * sure those are properly initialized. | |
1679 | */ | |
1680 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
1681 | ||
1682 | /* Device presence detection is unreliable on some | |
1683 | * controllers. Always poll IDENTIFY if available. | |
1684 | */ | |
1685 | tf.flags |= ATA_TFLAG_POLLING; | |
1da177e4 | 1686 | |
3373efd8 | 1687 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_FROM_DEVICE, |
49016aca | 1688 | id, sizeof(id[0]) * ATA_ID_WORDS); |
a0123703 | 1689 | if (err_mask) { |
800b3996 | 1690 | if (err_mask & AC_ERR_NODEV_HINT) { |
55a8e2c8 | 1691 | DPRINTK("ata%u.%d: NODEV after polling detection\n", |
44877b4e | 1692 | ap->print_id, dev->devno); |
55a8e2c8 TH |
1693 | return -ENOENT; |
1694 | } | |
1695 | ||
49016aca TH |
1696 | rc = -EIO; |
1697 | reason = "I/O error"; | |
1da177e4 LT |
1698 | goto err_out; |
1699 | } | |
1700 | ||
49016aca | 1701 | swap_buf_le16(id, ATA_ID_WORDS); |
1da177e4 | 1702 | |
49016aca | 1703 | /* sanity check */ |
a4f5749b TH |
1704 | rc = -EINVAL; |
1705 | reason = "device reports illegal type"; | |
1706 | ||
1707 | if (class == ATA_DEV_ATA) { | |
1708 | if (!ata_id_is_ata(id) && !ata_id_is_cfa(id)) | |
1709 | goto err_out; | |
1710 | } else { | |
1711 | if (ata_id_is_ata(id)) | |
1712 | goto err_out; | |
49016aca TH |
1713 | } |
1714 | ||
bff04647 | 1715 | if ((flags & ATA_READID_POSTRESET) && class == ATA_DEV_ATA) { |
49016aca TH |
1716 | /* |
1717 | * The exact sequence expected by certain pre-ATA4 drives is: | |
1718 | * SRST RESET | |
1719 | * IDENTIFY | |
1720 | * INITIALIZE DEVICE PARAMETERS | |
1721 | * anything else.. | |
1722 | * Some drives were very specific about that exact sequence. | |
1723 | */ | |
1724 | if (ata_id_major_version(id) < 4 || !ata_id_has_lba(id)) { | |
3373efd8 | 1725 | err_mask = ata_dev_init_params(dev, id[3], id[6]); |
49016aca TH |
1726 | if (err_mask) { |
1727 | rc = -EIO; | |
1728 | reason = "INIT_DEV_PARAMS failed"; | |
1729 | goto err_out; | |
1730 | } | |
1731 | ||
1732 | /* current CHS translation info (id[53-58]) might be | |
1733 | * changed. reread the identify device info. | |
1734 | */ | |
bff04647 | 1735 | flags &= ~ATA_READID_POSTRESET; |
49016aca TH |
1736 | goto retry; |
1737 | } | |
1738 | } | |
1739 | ||
1740 | *p_class = class; | |
fe635c7e | 1741 | |
49016aca TH |
1742 | return 0; |
1743 | ||
1744 | err_out: | |
88574551 | 1745 | if (ata_msg_warn(ap)) |
0dd4b21f | 1746 | ata_dev_printk(dev, KERN_WARNING, "failed to IDENTIFY " |
88574551 | 1747 | "(%s, err_mask=0x%x)\n", reason, err_mask); |
49016aca TH |
1748 | return rc; |
1749 | } | |
1750 | ||
3373efd8 | 1751 | static inline u8 ata_dev_knobble(struct ata_device *dev) |
4b2f3ede | 1752 | { |
3373efd8 | 1753 | return ((dev->ap->cbl == ATA_CBL_SATA) && (!ata_id_is_sata(dev->id))); |
4b2f3ede TH |
1754 | } |
1755 | ||
a6e6ce8e TH |
1756 | static void ata_dev_config_ncq(struct ata_device *dev, |
1757 | char *desc, size_t desc_sz) | |
1758 | { | |
1759 | struct ata_port *ap = dev->ap; | |
1760 | int hdepth = 0, ddepth = ata_id_queue_depth(dev->id); | |
1761 | ||
1762 | if (!ata_id_has_ncq(dev->id)) { | |
1763 | desc[0] = '\0'; | |
1764 | return; | |
1765 | } | |
6919a0a6 AC |
1766 | if (ata_device_blacklisted(dev) & ATA_HORKAGE_NONCQ) { |
1767 | snprintf(desc, desc_sz, "NCQ (not used)"); | |
1768 | return; | |
1769 | } | |
a6e6ce8e | 1770 | if (ap->flags & ATA_FLAG_NCQ) { |
cca3974e | 1771 | hdepth = min(ap->scsi_host->can_queue, ATA_MAX_QUEUE - 1); |
a6e6ce8e TH |
1772 | dev->flags |= ATA_DFLAG_NCQ; |
1773 | } | |
1774 | ||
1775 | if (hdepth >= ddepth) | |
1776 | snprintf(desc, desc_sz, "NCQ (depth %d)", ddepth); | |
1777 | else | |
1778 | snprintf(desc, desc_sz, "NCQ (depth %d/%d)", hdepth, ddepth); | |
1779 | } | |
1780 | ||
49016aca | 1781 | /** |
ffeae418 | 1782 | * ata_dev_configure - Configure the specified ATA/ATAPI device |
ffeae418 TH |
1783 | * @dev: Target device to configure |
1784 | * | |
1785 | * Configure @dev according to @dev->id. Generic and low-level | |
1786 | * driver specific fixups are also applied. | |
49016aca TH |
1787 | * |
1788 | * LOCKING: | |
ffeae418 TH |
1789 | * Kernel thread context (may sleep) |
1790 | * | |
1791 | * RETURNS: | |
1792 | * 0 on success, -errno otherwise | |
49016aca | 1793 | */ |
efdaedc4 | 1794 | int ata_dev_configure(struct ata_device *dev) |
49016aca | 1795 | { |
3373efd8 | 1796 | struct ata_port *ap = dev->ap; |
efdaedc4 | 1797 | int print_info = ap->eh_context.i.flags & ATA_EHI_PRINTINFO; |
1148c3a7 | 1798 | const u16 *id = dev->id; |
ff8854b2 | 1799 | unsigned int xfer_mask; |
b352e57d | 1800 | char revbuf[7]; /* XYZ-99\0 */ |
3f64f565 EM |
1801 | char fwrevbuf[ATA_ID_FW_REV_LEN+1]; |
1802 | char modelbuf[ATA_ID_PROD_LEN+1]; | |
e6d902a3 | 1803 | int rc; |
49016aca | 1804 | |
0dd4b21f | 1805 | if (!ata_dev_enabled(dev) && ata_msg_info(ap)) { |
44877b4e TH |
1806 | ata_dev_printk(dev, KERN_INFO, "%s: ENTER/EXIT -- nodev\n", |
1807 | __FUNCTION__); | |
ffeae418 | 1808 | return 0; |
49016aca TH |
1809 | } |
1810 | ||
0dd4b21f | 1811 | if (ata_msg_probe(ap)) |
44877b4e | 1812 | ata_dev_printk(dev, KERN_DEBUG, "%s: ENTER\n", __FUNCTION__); |
1da177e4 | 1813 | |
08573a86 KCA |
1814 | /* set _SDD */ |
1815 | rc = ata_acpi_push_id(ap, dev->devno); | |
1816 | if (rc) { | |
1817 | ata_dev_printk(dev, KERN_WARNING, "failed to set _SDD(%d)\n", | |
1818 | rc); | |
1819 | } | |
1820 | ||
1821 | /* retrieve and execute the ATA task file of _GTF */ | |
1822 | ata_acpi_exec_tfs(ap); | |
1823 | ||
c39f5ebe | 1824 | /* print device capabilities */ |
0dd4b21f | 1825 | if (ata_msg_probe(ap)) |
88574551 TH |
1826 | ata_dev_printk(dev, KERN_DEBUG, |
1827 | "%s: cfg 49:%04x 82:%04x 83:%04x 84:%04x " | |
1828 | "85:%04x 86:%04x 87:%04x 88:%04x\n", | |
0dd4b21f | 1829 | __FUNCTION__, |
f15a1daf TH |
1830 | id[49], id[82], id[83], id[84], |
1831 | id[85], id[86], id[87], id[88]); | |
c39f5ebe | 1832 | |
208a9933 | 1833 | /* initialize to-be-configured parameters */ |
ea1dd4e1 | 1834 | dev->flags &= ~ATA_DFLAG_CFG_MASK; |
208a9933 TH |
1835 | dev->max_sectors = 0; |
1836 | dev->cdb_len = 0; | |
1837 | dev->n_sectors = 0; | |
1838 | dev->cylinders = 0; | |
1839 | dev->heads = 0; | |
1840 | dev->sectors = 0; | |
1841 | ||
1da177e4 LT |
1842 | /* |
1843 | * common ATA, ATAPI feature tests | |
1844 | */ | |
1845 | ||
ff8854b2 | 1846 | /* find max transfer mode; for printk only */ |
1148c3a7 | 1847 | xfer_mask = ata_id_xfermask(id); |
1da177e4 | 1848 | |
0dd4b21f BP |
1849 | if (ata_msg_probe(ap)) |
1850 | ata_dump_id(id); | |
1da177e4 LT |
1851 | |
1852 | /* ATA-specific feature tests */ | |
1853 | if (dev->class == ATA_DEV_ATA) { | |
b352e57d AC |
1854 | if (ata_id_is_cfa(id)) { |
1855 | if (id[162] & 1) /* CPRM may make this media unusable */ | |
44877b4e TH |
1856 | ata_dev_printk(dev, KERN_WARNING, |
1857 | "supports DRM functions and may " | |
1858 | "not be fully accessable.\n"); | |
b352e57d AC |
1859 | snprintf(revbuf, 7, "CFA"); |
1860 | } | |
1861 | else | |
1862 | snprintf(revbuf, 7, "ATA-%d", ata_id_major_version(id)); | |
1863 | ||
1148c3a7 | 1864 | dev->n_sectors = ata_id_n_sectors(id); |
1e999736 | 1865 | dev->n_sectors_boot = dev->n_sectors; |
2940740b | 1866 | |
3f64f565 | 1867 | /* SCSI only uses 4-char revisions, dump full 8 chars from ATA */ |
591a6e8e | 1868 | ata_id_c_string(dev->id, fwrevbuf, ATA_ID_FW_REV, |
3f64f565 EM |
1869 | sizeof(fwrevbuf)); |
1870 | ||
591a6e8e | 1871 | ata_id_c_string(dev->id, modelbuf, ATA_ID_PROD, |
3f64f565 EM |
1872 | sizeof(modelbuf)); |
1873 | ||
1874 | if (dev->id[59] & 0x100) | |
1875 | dev->multi_count = dev->id[59] & 0xff; | |
1876 | ||
1148c3a7 | 1877 | if (ata_id_has_lba(id)) { |
4c2d721a | 1878 | const char *lba_desc; |
a6e6ce8e | 1879 | char ncq_desc[20]; |
8bf62ece | 1880 | |
4c2d721a TH |
1881 | lba_desc = "LBA"; |
1882 | dev->flags |= ATA_DFLAG_LBA; | |
1148c3a7 | 1883 | if (ata_id_has_lba48(id)) { |
8bf62ece | 1884 | dev->flags |= ATA_DFLAG_LBA48; |
4c2d721a | 1885 | lba_desc = "LBA48"; |
6fc49adb TH |
1886 | |
1887 | if (dev->n_sectors >= (1UL << 28) && | |
1888 | ata_id_has_flush_ext(id)) | |
1889 | dev->flags |= ATA_DFLAG_FLUSH_EXT; | |
4c2d721a | 1890 | } |
8bf62ece | 1891 | |
1e999736 AC |
1892 | if (ata_id_hpa_enabled(dev->id)) |
1893 | dev->n_sectors = ata_hpa_resize(dev); | |
1894 | ||
a6e6ce8e TH |
1895 | /* config NCQ */ |
1896 | ata_dev_config_ncq(dev, ncq_desc, sizeof(ncq_desc)); | |
1897 | ||
8bf62ece | 1898 | /* print device info to dmesg */ |
3f64f565 EM |
1899 | if (ata_msg_drv(ap) && print_info) { |
1900 | ata_dev_printk(dev, KERN_INFO, | |
1901 | "%s: %s, %s, max %s\n", | |
1902 | revbuf, modelbuf, fwrevbuf, | |
1903 | ata_mode_string(xfer_mask)); | |
1904 | ata_dev_printk(dev, KERN_INFO, | |
1905 | "%Lu sectors, multi %u: %s %s\n", | |
f15a1daf | 1906 | (unsigned long long)dev->n_sectors, |
3f64f565 EM |
1907 | dev->multi_count, lba_desc, ncq_desc); |
1908 | } | |
ffeae418 | 1909 | } else { |
8bf62ece AL |
1910 | /* CHS */ |
1911 | ||
1912 | /* Default translation */ | |
1148c3a7 TH |
1913 | dev->cylinders = id[1]; |
1914 | dev->heads = id[3]; | |
1915 | dev->sectors = id[6]; | |
8bf62ece | 1916 | |
1148c3a7 | 1917 | if (ata_id_current_chs_valid(id)) { |
8bf62ece | 1918 | /* Current CHS translation is valid. */ |
1148c3a7 TH |
1919 | dev->cylinders = id[54]; |
1920 | dev->heads = id[55]; | |
1921 | dev->sectors = id[56]; | |
8bf62ece AL |
1922 | } |
1923 | ||
1924 | /* print device info to dmesg */ | |
3f64f565 | 1925 | if (ata_msg_drv(ap) && print_info) { |
88574551 | 1926 | ata_dev_printk(dev, KERN_INFO, |
3f64f565 EM |
1927 | "%s: %s, %s, max %s\n", |
1928 | revbuf, modelbuf, fwrevbuf, | |
1929 | ata_mode_string(xfer_mask)); | |
a84471fe | 1930 | ata_dev_printk(dev, KERN_INFO, |
3f64f565 EM |
1931 | "%Lu sectors, multi %u, CHS %u/%u/%u\n", |
1932 | (unsigned long long)dev->n_sectors, | |
1933 | dev->multi_count, dev->cylinders, | |
1934 | dev->heads, dev->sectors); | |
1935 | } | |
07f6f7d0 AL |
1936 | } |
1937 | ||
6e7846e9 | 1938 | dev->cdb_len = 16; |
1da177e4 LT |
1939 | } |
1940 | ||
1941 | /* ATAPI-specific feature tests */ | |
2c13b7ce | 1942 | else if (dev->class == ATA_DEV_ATAPI) { |
08a556db AL |
1943 | char *cdb_intr_string = ""; |
1944 | ||
1148c3a7 | 1945 | rc = atapi_cdb_len(id); |
1da177e4 | 1946 | if ((rc < 12) || (rc > ATAPI_CDB_LEN)) { |
0dd4b21f | 1947 | if (ata_msg_warn(ap)) |
88574551 TH |
1948 | ata_dev_printk(dev, KERN_WARNING, |
1949 | "unsupported CDB len\n"); | |
ffeae418 | 1950 | rc = -EINVAL; |
1da177e4 LT |
1951 | goto err_out_nosup; |
1952 | } | |
6e7846e9 | 1953 | dev->cdb_len = (unsigned int) rc; |
1da177e4 | 1954 | |
08a556db | 1955 | if (ata_id_cdb_intr(dev->id)) { |
312f7da2 | 1956 | dev->flags |= ATA_DFLAG_CDB_INTR; |
08a556db AL |
1957 | cdb_intr_string = ", CDB intr"; |
1958 | } | |
312f7da2 | 1959 | |
1da177e4 | 1960 | /* print device info to dmesg */ |
5afc8142 | 1961 | if (ata_msg_drv(ap) && print_info) |
12436c30 TH |
1962 | ata_dev_printk(dev, KERN_INFO, "ATAPI, max %s%s\n", |
1963 | ata_mode_string(xfer_mask), | |
1964 | cdb_intr_string); | |
1da177e4 LT |
1965 | } |
1966 | ||
914ed354 TH |
1967 | /* determine max_sectors */ |
1968 | dev->max_sectors = ATA_MAX_SECTORS; | |
1969 | if (dev->flags & ATA_DFLAG_LBA48) | |
1970 | dev->max_sectors = ATA_MAX_SECTORS_LBA48; | |
1971 | ||
93590859 AC |
1972 | if (dev->horkage & ATA_HORKAGE_DIAGNOSTIC) { |
1973 | /* Let the user know. We don't want to disallow opens for | |
1974 | rescue purposes, or in case the vendor is just a blithering | |
1975 | idiot */ | |
1976 | if (print_info) { | |
1977 | ata_dev_printk(dev, KERN_WARNING, | |
1978 | "Drive reports diagnostics failure. This may indicate a drive\n"); | |
1979 | ata_dev_printk(dev, KERN_WARNING, | |
1980 | "fault or invalid emulation. Contact drive vendor for information.\n"); | |
1981 | } | |
1982 | } | |
1983 | ||
4b2f3ede | 1984 | /* limit bridge transfers to udma5, 200 sectors */ |
3373efd8 | 1985 | if (ata_dev_knobble(dev)) { |
5afc8142 | 1986 | if (ata_msg_drv(ap) && print_info) |
f15a1daf TH |
1987 | ata_dev_printk(dev, KERN_INFO, |
1988 | "applying bridge limits\n"); | |
5a529139 | 1989 | dev->udma_mask &= ATA_UDMA5; |
4b2f3ede TH |
1990 | dev->max_sectors = ATA_MAX_SECTORS; |
1991 | } | |
1992 | ||
18d6e9d5 | 1993 | if (ata_device_blacklisted(dev) & ATA_HORKAGE_MAX_SEC_128) |
03ec52de TH |
1994 | dev->max_sectors = min_t(unsigned int, ATA_MAX_SECTORS_128, |
1995 | dev->max_sectors); | |
18d6e9d5 | 1996 | |
6f23a31d AL |
1997 | /* limit ATAPI DMA to R/W commands only */ |
1998 | if (ata_device_blacklisted(dev) & ATA_HORKAGE_DMA_RW_ONLY) | |
1999 | dev->horkage |= ATA_HORKAGE_DMA_RW_ONLY; | |
2000 | ||
4b2f3ede | 2001 | if (ap->ops->dev_config) |
cd0d3bbc | 2002 | ap->ops->dev_config(dev); |
4b2f3ede | 2003 | |
0dd4b21f BP |
2004 | if (ata_msg_probe(ap)) |
2005 | ata_dev_printk(dev, KERN_DEBUG, "%s: EXIT, drv_stat = 0x%x\n", | |
2006 | __FUNCTION__, ata_chk_status(ap)); | |
ffeae418 | 2007 | return 0; |
1da177e4 LT |
2008 | |
2009 | err_out_nosup: | |
0dd4b21f | 2010 | if (ata_msg_probe(ap)) |
88574551 TH |
2011 | ata_dev_printk(dev, KERN_DEBUG, |
2012 | "%s: EXIT, err\n", __FUNCTION__); | |
ffeae418 | 2013 | return rc; |
1da177e4 LT |
2014 | } |
2015 | ||
be0d18df | 2016 | /** |
2e41e8e6 | 2017 | * ata_cable_40wire - return 40 wire cable type |
be0d18df AC |
2018 | * @ap: port |
2019 | * | |
2e41e8e6 | 2020 | * Helper method for drivers which want to hardwire 40 wire cable |
be0d18df AC |
2021 | * detection. |
2022 | */ | |
2023 | ||
2024 | int ata_cable_40wire(struct ata_port *ap) | |
2025 | { | |
2026 | return ATA_CBL_PATA40; | |
2027 | } | |
2028 | ||
2029 | /** | |
2e41e8e6 | 2030 | * ata_cable_80wire - return 80 wire cable type |
be0d18df AC |
2031 | * @ap: port |
2032 | * | |
2e41e8e6 | 2033 | * Helper method for drivers which want to hardwire 80 wire cable |
be0d18df AC |
2034 | * detection. |
2035 | */ | |
2036 | ||
2037 | int ata_cable_80wire(struct ata_port *ap) | |
2038 | { | |
2039 | return ATA_CBL_PATA80; | |
2040 | } | |
2041 | ||
2042 | /** | |
2043 | * ata_cable_unknown - return unknown PATA cable. | |
2044 | * @ap: port | |
2045 | * | |
2046 | * Helper method for drivers which have no PATA cable detection. | |
2047 | */ | |
2048 | ||
2049 | int ata_cable_unknown(struct ata_port *ap) | |
2050 | { | |
2051 | return ATA_CBL_PATA_UNK; | |
2052 | } | |
2053 | ||
2054 | /** | |
2055 | * ata_cable_sata - return SATA cable type | |
2056 | * @ap: port | |
2057 | * | |
2058 | * Helper method for drivers which have SATA cables | |
2059 | */ | |
2060 | ||
2061 | int ata_cable_sata(struct ata_port *ap) | |
2062 | { | |
2063 | return ATA_CBL_SATA; | |
2064 | } | |
2065 | ||
1da177e4 LT |
2066 | /** |
2067 | * ata_bus_probe - Reset and probe ATA bus | |
2068 | * @ap: Bus to probe | |
2069 | * | |
0cba632b JG |
2070 | * Master ATA bus probing function. Initiates a hardware-dependent |
2071 | * bus reset, then attempts to identify any devices found on | |
2072 | * the bus. | |
2073 | * | |
1da177e4 | 2074 | * LOCKING: |
0cba632b | 2075 | * PCI/etc. bus probe sem. |
1da177e4 LT |
2076 | * |
2077 | * RETURNS: | |
96072e69 | 2078 | * Zero on success, negative errno otherwise. |
1da177e4 LT |
2079 | */ |
2080 | ||
80289167 | 2081 | int ata_bus_probe(struct ata_port *ap) |
1da177e4 | 2082 | { |
28ca5c57 | 2083 | unsigned int classes[ATA_MAX_DEVICES]; |
14d2bac1 | 2084 | int tries[ATA_MAX_DEVICES]; |
4ae72a1e | 2085 | int i, rc; |
e82cbdb9 | 2086 | struct ata_device *dev; |
1da177e4 | 2087 | |
28ca5c57 | 2088 | ata_port_probe(ap); |
c19ba8af | 2089 | |
14d2bac1 TH |
2090 | for (i = 0; i < ATA_MAX_DEVICES; i++) |
2091 | tries[i] = ATA_PROBE_MAX_TRIES; | |
2092 | ||
2093 | retry: | |
2044470c | 2094 | /* reset and determine device classes */ |
52783c5d | 2095 | ap->ops->phy_reset(ap); |
2061a47a | 2096 | |
52783c5d TH |
2097 | for (i = 0; i < ATA_MAX_DEVICES; i++) { |
2098 | dev = &ap->device[i]; | |
c19ba8af | 2099 | |
52783c5d TH |
2100 | if (!(ap->flags & ATA_FLAG_DISABLED) && |
2101 | dev->class != ATA_DEV_UNKNOWN) | |
2102 | classes[dev->devno] = dev->class; | |
2103 | else | |
2104 | classes[dev->devno] = ATA_DEV_NONE; | |
2044470c | 2105 | |
52783c5d | 2106 | dev->class = ATA_DEV_UNKNOWN; |
28ca5c57 | 2107 | } |
1da177e4 | 2108 | |
52783c5d | 2109 | ata_port_probe(ap); |
2044470c | 2110 | |
b6079ca4 AC |
2111 | /* after the reset the device state is PIO 0 and the controller |
2112 | state is undefined. Record the mode */ | |
2113 | ||
2114 | for (i = 0; i < ATA_MAX_DEVICES; i++) | |
2115 | ap->device[i].pio_mode = XFER_PIO_0; | |
2116 | ||
f31f0cc2 JG |
2117 | /* read IDENTIFY page and configure devices. We have to do the identify |
2118 | specific sequence bass-ackwards so that PDIAG- is released by | |
2119 | the slave device */ | |
2120 | ||
2121 | for (i = ATA_MAX_DEVICES - 1; i >= 0; i--) { | |
e82cbdb9 | 2122 | dev = &ap->device[i]; |
28ca5c57 | 2123 | |
ec573755 TH |
2124 | if (tries[i]) |
2125 | dev->class = classes[i]; | |
ffeae418 | 2126 | |
14d2bac1 | 2127 | if (!ata_dev_enabled(dev)) |
ffeae418 | 2128 | continue; |
ffeae418 | 2129 | |
bff04647 TH |
2130 | rc = ata_dev_read_id(dev, &dev->class, ATA_READID_POSTRESET, |
2131 | dev->id); | |
14d2bac1 TH |
2132 | if (rc) |
2133 | goto fail; | |
f31f0cc2 JG |
2134 | } |
2135 | ||
be0d18df AC |
2136 | /* Now ask for the cable type as PDIAG- should have been released */ |
2137 | if (ap->ops->cable_detect) | |
2138 | ap->cbl = ap->ops->cable_detect(ap); | |
2139 | ||
f31f0cc2 JG |
2140 | /* After the identify sequence we can now set up the devices. We do |
2141 | this in the normal order so that the user doesn't get confused */ | |
2142 | ||
2143 | for(i = 0; i < ATA_MAX_DEVICES; i++) { | |
2144 | dev = &ap->device[i]; | |
2145 | if (!ata_dev_enabled(dev)) | |
2146 | continue; | |
14d2bac1 | 2147 | |
efdaedc4 TH |
2148 | ap->eh_context.i.flags |= ATA_EHI_PRINTINFO; |
2149 | rc = ata_dev_configure(dev); | |
2150 | ap->eh_context.i.flags &= ~ATA_EHI_PRINTINFO; | |
14d2bac1 TH |
2151 | if (rc) |
2152 | goto fail; | |
1da177e4 LT |
2153 | } |
2154 | ||
e82cbdb9 | 2155 | /* configure transfer mode */ |
3adcebb2 | 2156 | rc = ata_set_mode(ap, &dev); |
4ae72a1e | 2157 | if (rc) |
51713d35 | 2158 | goto fail; |
1da177e4 | 2159 | |
e82cbdb9 TH |
2160 | for (i = 0; i < ATA_MAX_DEVICES; i++) |
2161 | if (ata_dev_enabled(&ap->device[i])) | |
2162 | return 0; | |
1da177e4 | 2163 | |
e82cbdb9 TH |
2164 | /* no device present, disable port */ |
2165 | ata_port_disable(ap); | |
1da177e4 | 2166 | ap->ops->port_disable(ap); |
96072e69 | 2167 | return -ENODEV; |
14d2bac1 TH |
2168 | |
2169 | fail: | |
4ae72a1e TH |
2170 | tries[dev->devno]--; |
2171 | ||
14d2bac1 TH |
2172 | switch (rc) { |
2173 | case -EINVAL: | |
4ae72a1e | 2174 | /* eeek, something went very wrong, give up */ |
14d2bac1 TH |
2175 | tries[dev->devno] = 0; |
2176 | break; | |
4ae72a1e TH |
2177 | |
2178 | case -ENODEV: | |
2179 | /* give it just one more chance */ | |
2180 | tries[dev->devno] = min(tries[dev->devno], 1); | |
14d2bac1 | 2181 | case -EIO: |
4ae72a1e TH |
2182 | if (tries[dev->devno] == 1) { |
2183 | /* This is the last chance, better to slow | |
2184 | * down than lose it. | |
2185 | */ | |
2186 | sata_down_spd_limit(ap); | |
2187 | ata_down_xfermask_limit(dev, ATA_DNXFER_PIO); | |
2188 | } | |
14d2bac1 TH |
2189 | } |
2190 | ||
4ae72a1e | 2191 | if (!tries[dev->devno]) |
3373efd8 | 2192 | ata_dev_disable(dev); |
ec573755 | 2193 | |
14d2bac1 | 2194 | goto retry; |
1da177e4 LT |
2195 | } |
2196 | ||
2197 | /** | |
0cba632b JG |
2198 | * ata_port_probe - Mark port as enabled |
2199 | * @ap: Port for which we indicate enablement | |
1da177e4 | 2200 | * |
0cba632b JG |
2201 | * Modify @ap data structure such that the system |
2202 | * thinks that the entire port is enabled. | |
2203 | * | |
cca3974e | 2204 | * LOCKING: host lock, or some other form of |
0cba632b | 2205 | * serialization. |
1da177e4 LT |
2206 | */ |
2207 | ||
2208 | void ata_port_probe(struct ata_port *ap) | |
2209 | { | |
198e0fed | 2210 | ap->flags &= ~ATA_FLAG_DISABLED; |
1da177e4 LT |
2211 | } |
2212 | ||
3be680b7 TH |
2213 | /** |
2214 | * sata_print_link_status - Print SATA link status | |
2215 | * @ap: SATA port to printk link status about | |
2216 | * | |
2217 | * This function prints link speed and status of a SATA link. | |
2218 | * | |
2219 | * LOCKING: | |
2220 | * None. | |
2221 | */ | |
43727fbc | 2222 | void sata_print_link_status(struct ata_port *ap) |
3be680b7 | 2223 | { |
6d5f9732 | 2224 | u32 sstatus, scontrol, tmp; |
3be680b7 | 2225 | |
81952c54 | 2226 | if (sata_scr_read(ap, SCR_STATUS, &sstatus)) |
3be680b7 | 2227 | return; |
81952c54 | 2228 | sata_scr_read(ap, SCR_CONTROL, &scontrol); |
3be680b7 | 2229 | |
81952c54 | 2230 | if (ata_port_online(ap)) { |
3be680b7 | 2231 | tmp = (sstatus >> 4) & 0xf; |
f15a1daf TH |
2232 | ata_port_printk(ap, KERN_INFO, |
2233 | "SATA link up %s (SStatus %X SControl %X)\n", | |
2234 | sata_spd_string(tmp), sstatus, scontrol); | |
3be680b7 | 2235 | } else { |
f15a1daf TH |
2236 | ata_port_printk(ap, KERN_INFO, |
2237 | "SATA link down (SStatus %X SControl %X)\n", | |
2238 | sstatus, scontrol); | |
3be680b7 TH |
2239 | } |
2240 | } | |
2241 | ||
1da177e4 | 2242 | /** |
780a87f7 JG |
2243 | * __sata_phy_reset - Wake/reset a low-level SATA PHY |
2244 | * @ap: SATA port associated with target SATA PHY. | |
1da177e4 | 2245 | * |
780a87f7 JG |
2246 | * This function issues commands to standard SATA Sxxx |
2247 | * PHY registers, to wake up the phy (and device), and | |
2248 | * clear any reset condition. | |
1da177e4 LT |
2249 | * |
2250 | * LOCKING: | |
0cba632b | 2251 | * PCI/etc. bus probe sem. |
1da177e4 LT |
2252 | * |
2253 | */ | |
2254 | void __sata_phy_reset(struct ata_port *ap) | |
2255 | { | |
2256 | u32 sstatus; | |
2257 | unsigned long timeout = jiffies + (HZ * 5); | |
2258 | ||
2259 | if (ap->flags & ATA_FLAG_SATA_RESET) { | |
cdcca89e | 2260 | /* issue phy wake/reset */ |
81952c54 | 2261 | sata_scr_write_flush(ap, SCR_CONTROL, 0x301); |
62ba2841 TH |
2262 | /* Couldn't find anything in SATA I/II specs, but |
2263 | * AHCI-1.1 10.4.2 says at least 1 ms. */ | |
2264 | mdelay(1); | |
1da177e4 | 2265 | } |
81952c54 TH |
2266 | /* phy wake/clear reset */ |
2267 | sata_scr_write_flush(ap, SCR_CONTROL, 0x300); | |
1da177e4 LT |
2268 | |
2269 | /* wait for phy to become ready, if necessary */ | |
2270 | do { | |
2271 | msleep(200); | |
81952c54 | 2272 | sata_scr_read(ap, SCR_STATUS, &sstatus); |
1da177e4 LT |
2273 | if ((sstatus & 0xf) != 1) |
2274 | break; | |
2275 | } while (time_before(jiffies, timeout)); | |
2276 | ||
3be680b7 TH |
2277 | /* print link status */ |
2278 | sata_print_link_status(ap); | |
656563e3 | 2279 | |
3be680b7 | 2280 | /* TODO: phy layer with polling, timeouts, etc. */ |
81952c54 | 2281 | if (!ata_port_offline(ap)) |
1da177e4 | 2282 | ata_port_probe(ap); |
3be680b7 | 2283 | else |
1da177e4 | 2284 | ata_port_disable(ap); |
1da177e4 | 2285 | |
198e0fed | 2286 | if (ap->flags & ATA_FLAG_DISABLED) |
1da177e4 LT |
2287 | return; |
2288 | ||
2289 | if (ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT)) { | |
2290 | ata_port_disable(ap); | |
2291 | return; | |
2292 | } | |
2293 | ||
2294 | ap->cbl = ATA_CBL_SATA; | |
2295 | } | |
2296 | ||
2297 | /** | |
780a87f7 JG |
2298 | * sata_phy_reset - Reset SATA bus. |
2299 | * @ap: SATA port associated with target SATA PHY. | |
1da177e4 | 2300 | * |
780a87f7 JG |
2301 | * This function resets the SATA bus, and then probes |
2302 | * the bus for devices. | |
1da177e4 LT |
2303 | * |
2304 | * LOCKING: | |
0cba632b | 2305 | * PCI/etc. bus probe sem. |
1da177e4 LT |
2306 | * |
2307 | */ | |
2308 | void sata_phy_reset(struct ata_port *ap) | |
2309 | { | |
2310 | __sata_phy_reset(ap); | |
198e0fed | 2311 | if (ap->flags & ATA_FLAG_DISABLED) |
1da177e4 LT |
2312 | return; |
2313 | ata_bus_reset(ap); | |
2314 | } | |
2315 | ||
ebdfca6e AC |
2316 | /** |
2317 | * ata_dev_pair - return other device on cable | |
ebdfca6e AC |
2318 | * @adev: device |
2319 | * | |
2320 | * Obtain the other device on the same cable, or if none is | |
2321 | * present NULL is returned | |
2322 | */ | |
2e9edbf8 | 2323 | |
3373efd8 | 2324 | struct ata_device *ata_dev_pair(struct ata_device *adev) |
ebdfca6e | 2325 | { |
3373efd8 | 2326 | struct ata_port *ap = adev->ap; |
ebdfca6e | 2327 | struct ata_device *pair = &ap->device[1 - adev->devno]; |
e1211e3f | 2328 | if (!ata_dev_enabled(pair)) |
ebdfca6e AC |
2329 | return NULL; |
2330 | return pair; | |
2331 | } | |
2332 | ||
1da177e4 | 2333 | /** |
780a87f7 JG |
2334 | * ata_port_disable - Disable port. |
2335 | * @ap: Port to be disabled. | |
1da177e4 | 2336 | * |
780a87f7 JG |
2337 | * Modify @ap data structure such that the system |
2338 | * thinks that the entire port is disabled, and should | |
2339 | * never attempt to probe or communicate with devices | |
2340 | * on this port. | |
2341 | * | |
cca3974e | 2342 | * LOCKING: host lock, or some other form of |
780a87f7 | 2343 | * serialization. |
1da177e4 LT |
2344 | */ |
2345 | ||
2346 | void ata_port_disable(struct ata_port *ap) | |
2347 | { | |
2348 | ap->device[0].class = ATA_DEV_NONE; | |
2349 | ap->device[1].class = ATA_DEV_NONE; | |
198e0fed | 2350 | ap->flags |= ATA_FLAG_DISABLED; |
1da177e4 LT |
2351 | } |
2352 | ||
1c3fae4d | 2353 | /** |
3c567b7d | 2354 | * sata_down_spd_limit - adjust SATA spd limit downward |
1c3fae4d TH |
2355 | * @ap: Port to adjust SATA spd limit for |
2356 | * | |
2357 | * Adjust SATA spd limit of @ap downward. Note that this | |
2358 | * function only adjusts the limit. The change must be applied | |
3c567b7d | 2359 | * using sata_set_spd(). |
1c3fae4d TH |
2360 | * |
2361 | * LOCKING: | |
2362 | * Inherited from caller. | |
2363 | * | |
2364 | * RETURNS: | |
2365 | * 0 on success, negative errno on failure | |
2366 | */ | |
3c567b7d | 2367 | int sata_down_spd_limit(struct ata_port *ap) |
1c3fae4d | 2368 | { |
81952c54 TH |
2369 | u32 sstatus, spd, mask; |
2370 | int rc, highbit; | |
1c3fae4d | 2371 | |
81952c54 TH |
2372 | rc = sata_scr_read(ap, SCR_STATUS, &sstatus); |
2373 | if (rc) | |
2374 | return rc; | |
1c3fae4d TH |
2375 | |
2376 | mask = ap->sata_spd_limit; | |
2377 | if (mask <= 1) | |
2378 | return -EINVAL; | |
2379 | highbit = fls(mask) - 1; | |
2380 | mask &= ~(1 << highbit); | |
2381 | ||
81952c54 | 2382 | spd = (sstatus >> 4) & 0xf; |
1c3fae4d TH |
2383 | if (spd <= 1) |
2384 | return -EINVAL; | |
2385 | spd--; | |
2386 | mask &= (1 << spd) - 1; | |
2387 | if (!mask) | |
2388 | return -EINVAL; | |
2389 | ||
2390 | ap->sata_spd_limit = mask; | |
2391 | ||
f15a1daf TH |
2392 | ata_port_printk(ap, KERN_WARNING, "limiting SATA link speed to %s\n", |
2393 | sata_spd_string(fls(mask))); | |
1c3fae4d TH |
2394 | |
2395 | return 0; | |
2396 | } | |
2397 | ||
3c567b7d | 2398 | static int __sata_set_spd_needed(struct ata_port *ap, u32 *scontrol) |
1c3fae4d TH |
2399 | { |
2400 | u32 spd, limit; | |
2401 | ||
2402 | if (ap->sata_spd_limit == UINT_MAX) | |
2403 | limit = 0; | |
2404 | else | |
2405 | limit = fls(ap->sata_spd_limit); | |
2406 | ||
2407 | spd = (*scontrol >> 4) & 0xf; | |
2408 | *scontrol = (*scontrol & ~0xf0) | ((limit & 0xf) << 4); | |
2409 | ||
2410 | return spd != limit; | |
2411 | } | |
2412 | ||
2413 | /** | |
3c567b7d | 2414 | * sata_set_spd_needed - is SATA spd configuration needed |
1c3fae4d TH |
2415 | * @ap: Port in question |
2416 | * | |
2417 | * Test whether the spd limit in SControl matches | |
2418 | * @ap->sata_spd_limit. This function is used to determine | |
2419 | * whether hardreset is necessary to apply SATA spd | |
2420 | * configuration. | |
2421 | * | |
2422 | * LOCKING: | |
2423 | * Inherited from caller. | |
2424 | * | |
2425 | * RETURNS: | |
2426 | * 1 if SATA spd configuration is needed, 0 otherwise. | |
2427 | */ | |
3c567b7d | 2428 | int sata_set_spd_needed(struct ata_port *ap) |
1c3fae4d TH |
2429 | { |
2430 | u32 scontrol; | |
2431 | ||
81952c54 | 2432 | if (sata_scr_read(ap, SCR_CONTROL, &scontrol)) |
1c3fae4d TH |
2433 | return 0; |
2434 | ||
3c567b7d | 2435 | return __sata_set_spd_needed(ap, &scontrol); |
1c3fae4d TH |
2436 | } |
2437 | ||
2438 | /** | |
3c567b7d | 2439 | * sata_set_spd - set SATA spd according to spd limit |
1c3fae4d TH |
2440 | * @ap: Port to set SATA spd for |
2441 | * | |
2442 | * Set SATA spd of @ap according to sata_spd_limit. | |
2443 | * | |
2444 | * LOCKING: | |
2445 | * Inherited from caller. | |
2446 | * | |
2447 | * RETURNS: | |
2448 | * 0 if spd doesn't need to be changed, 1 if spd has been | |
81952c54 | 2449 | * changed. Negative errno if SCR registers are inaccessible. |
1c3fae4d | 2450 | */ |
3c567b7d | 2451 | int sata_set_spd(struct ata_port *ap) |
1c3fae4d TH |
2452 | { |
2453 | u32 scontrol; | |
81952c54 | 2454 | int rc; |
1c3fae4d | 2455 | |
81952c54 TH |
2456 | if ((rc = sata_scr_read(ap, SCR_CONTROL, &scontrol))) |
2457 | return rc; | |
1c3fae4d | 2458 | |
3c567b7d | 2459 | if (!__sata_set_spd_needed(ap, &scontrol)) |
1c3fae4d TH |
2460 | return 0; |
2461 | ||
81952c54 TH |
2462 | if ((rc = sata_scr_write(ap, SCR_CONTROL, scontrol))) |
2463 | return rc; | |
2464 | ||
1c3fae4d TH |
2465 | return 1; |
2466 | } | |
2467 | ||
452503f9 AC |
2468 | /* |
2469 | * This mode timing computation functionality is ported over from | |
2470 | * drivers/ide/ide-timing.h and was originally written by Vojtech Pavlik | |
2471 | */ | |
2472 | /* | |
b352e57d | 2473 | * PIO 0-4, MWDMA 0-2 and UDMA 0-6 timings (in nanoseconds). |
452503f9 | 2474 | * These were taken from ATA/ATAPI-6 standard, rev 0a, except |
b352e57d AC |
2475 | * for UDMA6, which is currently supported only by Maxtor drives. |
2476 | * | |
2477 | * For PIO 5/6 MWDMA 3/4 see the CFA specification 3.0. | |
452503f9 AC |
2478 | */ |
2479 | ||
2480 | static const struct ata_timing ata_timing[] = { | |
2481 | ||
2482 | { XFER_UDMA_6, 0, 0, 0, 0, 0, 0, 0, 15 }, | |
2483 | { XFER_UDMA_5, 0, 0, 0, 0, 0, 0, 0, 20 }, | |
2484 | { XFER_UDMA_4, 0, 0, 0, 0, 0, 0, 0, 30 }, | |
2485 | { XFER_UDMA_3, 0, 0, 0, 0, 0, 0, 0, 45 }, | |
2486 | ||
b352e57d AC |
2487 | { XFER_MW_DMA_4, 25, 0, 0, 0, 55, 20, 80, 0 }, |
2488 | { XFER_MW_DMA_3, 25, 0, 0, 0, 65, 25, 100, 0 }, | |
452503f9 AC |
2489 | { XFER_UDMA_2, 0, 0, 0, 0, 0, 0, 0, 60 }, |
2490 | { XFER_UDMA_1, 0, 0, 0, 0, 0, 0, 0, 80 }, | |
2491 | { XFER_UDMA_0, 0, 0, 0, 0, 0, 0, 0, 120 }, | |
2492 | ||
2493 | /* { XFER_UDMA_SLOW, 0, 0, 0, 0, 0, 0, 0, 150 }, */ | |
2e9edbf8 | 2494 | |
452503f9 AC |
2495 | { XFER_MW_DMA_2, 25, 0, 0, 0, 70, 25, 120, 0 }, |
2496 | { XFER_MW_DMA_1, 45, 0, 0, 0, 80, 50, 150, 0 }, | |
2497 | { XFER_MW_DMA_0, 60, 0, 0, 0, 215, 215, 480, 0 }, | |
2e9edbf8 | 2498 | |
452503f9 AC |
2499 | { XFER_SW_DMA_2, 60, 0, 0, 0, 120, 120, 240, 0 }, |
2500 | { XFER_SW_DMA_1, 90, 0, 0, 0, 240, 240, 480, 0 }, | |
2501 | { XFER_SW_DMA_0, 120, 0, 0, 0, 480, 480, 960, 0 }, | |
2502 | ||
b352e57d AC |
2503 | { XFER_PIO_6, 10, 55, 20, 80, 55, 20, 80, 0 }, |
2504 | { XFER_PIO_5, 15, 65, 25, 100, 65, 25, 100, 0 }, | |
452503f9 AC |
2505 | { XFER_PIO_4, 25, 70, 25, 120, 70, 25, 120, 0 }, |
2506 | { XFER_PIO_3, 30, 80, 70, 180, 80, 70, 180, 0 }, | |
2507 | ||
2508 | { XFER_PIO_2, 30, 290, 40, 330, 100, 90, 240, 0 }, | |
2509 | { XFER_PIO_1, 50, 290, 93, 383, 125, 100, 383, 0 }, | |
2510 | { XFER_PIO_0, 70, 290, 240, 600, 165, 150, 600, 0 }, | |
2511 | ||
2512 | /* { XFER_PIO_SLOW, 120, 290, 240, 960, 290, 240, 960, 0 }, */ | |
2513 | ||
2514 | { 0xFF } | |
2515 | }; | |
2516 | ||
2517 | #define ENOUGH(v,unit) (((v)-1)/(unit)+1) | |
2518 | #define EZ(v,unit) ((v)?ENOUGH(v,unit):0) | |
2519 | ||
2520 | static void ata_timing_quantize(const struct ata_timing *t, struct ata_timing *q, int T, int UT) | |
2521 | { | |
2522 | q->setup = EZ(t->setup * 1000, T); | |
2523 | q->act8b = EZ(t->act8b * 1000, T); | |
2524 | q->rec8b = EZ(t->rec8b * 1000, T); | |
2525 | q->cyc8b = EZ(t->cyc8b * 1000, T); | |
2526 | q->active = EZ(t->active * 1000, T); | |
2527 | q->recover = EZ(t->recover * 1000, T); | |
2528 | q->cycle = EZ(t->cycle * 1000, T); | |
2529 | q->udma = EZ(t->udma * 1000, UT); | |
2530 | } | |
2531 | ||
2532 | void ata_timing_merge(const struct ata_timing *a, const struct ata_timing *b, | |
2533 | struct ata_timing *m, unsigned int what) | |
2534 | { | |
2535 | if (what & ATA_TIMING_SETUP ) m->setup = max(a->setup, b->setup); | |
2536 | if (what & ATA_TIMING_ACT8B ) m->act8b = max(a->act8b, b->act8b); | |
2537 | if (what & ATA_TIMING_REC8B ) m->rec8b = max(a->rec8b, b->rec8b); | |
2538 | if (what & ATA_TIMING_CYC8B ) m->cyc8b = max(a->cyc8b, b->cyc8b); | |
2539 | if (what & ATA_TIMING_ACTIVE ) m->active = max(a->active, b->active); | |
2540 | if (what & ATA_TIMING_RECOVER) m->recover = max(a->recover, b->recover); | |
2541 | if (what & ATA_TIMING_CYCLE ) m->cycle = max(a->cycle, b->cycle); | |
2542 | if (what & ATA_TIMING_UDMA ) m->udma = max(a->udma, b->udma); | |
2543 | } | |
2544 | ||
2545 | static const struct ata_timing* ata_timing_find_mode(unsigned short speed) | |
2546 | { | |
2547 | const struct ata_timing *t; | |
2548 | ||
2549 | for (t = ata_timing; t->mode != speed; t++) | |
91190758 | 2550 | if (t->mode == 0xFF) |
452503f9 | 2551 | return NULL; |
2e9edbf8 | 2552 | return t; |
452503f9 AC |
2553 | } |
2554 | ||
2555 | int ata_timing_compute(struct ata_device *adev, unsigned short speed, | |
2556 | struct ata_timing *t, int T, int UT) | |
2557 | { | |
2558 | const struct ata_timing *s; | |
2559 | struct ata_timing p; | |
2560 | ||
2561 | /* | |
2e9edbf8 | 2562 | * Find the mode. |
75b1f2f8 | 2563 | */ |
452503f9 AC |
2564 | |
2565 | if (!(s = ata_timing_find_mode(speed))) | |
2566 | return -EINVAL; | |
2567 | ||
75b1f2f8 AL |
2568 | memcpy(t, s, sizeof(*s)); |
2569 | ||
452503f9 AC |
2570 | /* |
2571 | * If the drive is an EIDE drive, it can tell us it needs extended | |
2572 | * PIO/MW_DMA cycle timing. | |
2573 | */ | |
2574 | ||
2575 | if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE drive */ | |
2576 | memset(&p, 0, sizeof(p)); | |
2577 | if(speed >= XFER_PIO_0 && speed <= XFER_SW_DMA_0) { | |
2578 | if (speed <= XFER_PIO_2) p.cycle = p.cyc8b = adev->id[ATA_ID_EIDE_PIO]; | |
2579 | else p.cycle = p.cyc8b = adev->id[ATA_ID_EIDE_PIO_IORDY]; | |
2580 | } else if(speed >= XFER_MW_DMA_0 && speed <= XFER_MW_DMA_2) { | |
2581 | p.cycle = adev->id[ATA_ID_EIDE_DMA_MIN]; | |
2582 | } | |
2583 | ata_timing_merge(&p, t, t, ATA_TIMING_CYCLE | ATA_TIMING_CYC8B); | |
2584 | } | |
2585 | ||
2586 | /* | |
2587 | * Convert the timing to bus clock counts. | |
2588 | */ | |
2589 | ||
75b1f2f8 | 2590 | ata_timing_quantize(t, t, T, UT); |
452503f9 AC |
2591 | |
2592 | /* | |
c893a3ae RD |
2593 | * Even in DMA/UDMA modes we still use PIO access for IDENTIFY, |
2594 | * S.M.A.R.T * and some other commands. We have to ensure that the | |
2595 | * DMA cycle timing is slower/equal than the fastest PIO timing. | |
452503f9 AC |
2596 | */ |
2597 | ||
fd3367af | 2598 | if (speed > XFER_PIO_6) { |
452503f9 AC |
2599 | ata_timing_compute(adev, adev->pio_mode, &p, T, UT); |
2600 | ata_timing_merge(&p, t, t, ATA_TIMING_ALL); | |
2601 | } | |
2602 | ||
2603 | /* | |
c893a3ae | 2604 | * Lengthen active & recovery time so that cycle time is correct. |
452503f9 AC |
2605 | */ |
2606 | ||
2607 | if (t->act8b + t->rec8b < t->cyc8b) { | |
2608 | t->act8b += (t->cyc8b - (t->act8b + t->rec8b)) / 2; | |
2609 | t->rec8b = t->cyc8b - t->act8b; | |
2610 | } | |
2611 | ||
2612 | if (t->active + t->recover < t->cycle) { | |
2613 | t->active += (t->cycle - (t->active + t->recover)) / 2; | |
2614 | t->recover = t->cycle - t->active; | |
2615 | } | |
2616 | ||
2617 | return 0; | |
2618 | } | |
2619 | ||
cf176e1a TH |
2620 | /** |
2621 | * ata_down_xfermask_limit - adjust dev xfer masks downward | |
cf176e1a | 2622 | * @dev: Device to adjust xfer masks |
458337db | 2623 | * @sel: ATA_DNXFER_* selector |
cf176e1a TH |
2624 | * |
2625 | * Adjust xfer masks of @dev downward. Note that this function | |
2626 | * does not apply the change. Invoking ata_set_mode() afterwards | |
2627 | * will apply the limit. | |
2628 | * | |
2629 | * LOCKING: | |
2630 | * Inherited from caller. | |
2631 | * | |
2632 | * RETURNS: | |
2633 | * 0 on success, negative errno on failure | |
2634 | */ | |
458337db | 2635 | int ata_down_xfermask_limit(struct ata_device *dev, unsigned int sel) |
cf176e1a | 2636 | { |
458337db TH |
2637 | char buf[32]; |
2638 | unsigned int orig_mask, xfer_mask; | |
2639 | unsigned int pio_mask, mwdma_mask, udma_mask; | |
2640 | int quiet, highbit; | |
cf176e1a | 2641 | |
458337db TH |
2642 | quiet = !!(sel & ATA_DNXFER_QUIET); |
2643 | sel &= ~ATA_DNXFER_QUIET; | |
cf176e1a | 2644 | |
458337db TH |
2645 | xfer_mask = orig_mask = ata_pack_xfermask(dev->pio_mask, |
2646 | dev->mwdma_mask, | |
2647 | dev->udma_mask); | |
2648 | ata_unpack_xfermask(xfer_mask, &pio_mask, &mwdma_mask, &udma_mask); | |
cf176e1a | 2649 | |
458337db TH |
2650 | switch (sel) { |
2651 | case ATA_DNXFER_PIO: | |
2652 | highbit = fls(pio_mask) - 1; | |
2653 | pio_mask &= ~(1 << highbit); | |
2654 | break; | |
2655 | ||
2656 | case ATA_DNXFER_DMA: | |
2657 | if (udma_mask) { | |
2658 | highbit = fls(udma_mask) - 1; | |
2659 | udma_mask &= ~(1 << highbit); | |
2660 | if (!udma_mask) | |
2661 | return -ENOENT; | |
2662 | } else if (mwdma_mask) { | |
2663 | highbit = fls(mwdma_mask) - 1; | |
2664 | mwdma_mask &= ~(1 << highbit); | |
2665 | if (!mwdma_mask) | |
2666 | return -ENOENT; | |
2667 | } | |
2668 | break; | |
2669 | ||
2670 | case ATA_DNXFER_40C: | |
2671 | udma_mask &= ATA_UDMA_MASK_40C; | |
2672 | break; | |
2673 | ||
2674 | case ATA_DNXFER_FORCE_PIO0: | |
2675 | pio_mask &= 1; | |
2676 | case ATA_DNXFER_FORCE_PIO: | |
2677 | mwdma_mask = 0; | |
2678 | udma_mask = 0; | |
2679 | break; | |
2680 | ||
458337db TH |
2681 | default: |
2682 | BUG(); | |
2683 | } | |
2684 | ||
2685 | xfer_mask &= ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask); | |
2686 | ||
2687 | if (!(xfer_mask & ATA_MASK_PIO) || xfer_mask == orig_mask) | |
2688 | return -ENOENT; | |
2689 | ||
2690 | if (!quiet) { | |
2691 | if (xfer_mask & (ATA_MASK_MWDMA | ATA_MASK_UDMA)) | |
2692 | snprintf(buf, sizeof(buf), "%s:%s", | |
2693 | ata_mode_string(xfer_mask), | |
2694 | ata_mode_string(xfer_mask & ATA_MASK_PIO)); | |
2695 | else | |
2696 | snprintf(buf, sizeof(buf), "%s", | |
2697 | ata_mode_string(xfer_mask)); | |
2698 | ||
2699 | ata_dev_printk(dev, KERN_WARNING, | |
2700 | "limiting speed to %s\n", buf); | |
2701 | } | |
cf176e1a TH |
2702 | |
2703 | ata_unpack_xfermask(xfer_mask, &dev->pio_mask, &dev->mwdma_mask, | |
2704 | &dev->udma_mask); | |
2705 | ||
cf176e1a | 2706 | return 0; |
cf176e1a TH |
2707 | } |
2708 | ||
3373efd8 | 2709 | static int ata_dev_set_mode(struct ata_device *dev) |
1da177e4 | 2710 | { |
baa1e78a | 2711 | struct ata_eh_context *ehc = &dev->ap->eh_context; |
83206a29 TH |
2712 | unsigned int err_mask; |
2713 | int rc; | |
1da177e4 | 2714 | |
e8384607 | 2715 | dev->flags &= ~ATA_DFLAG_PIO; |
1da177e4 LT |
2716 | if (dev->xfer_shift == ATA_SHIFT_PIO) |
2717 | dev->flags |= ATA_DFLAG_PIO; | |
2718 | ||
3373efd8 | 2719 | err_mask = ata_dev_set_xfermode(dev); |
11750a40 A |
2720 | /* Old CFA may refuse this command, which is just fine */ |
2721 | if (dev->xfer_shift == ATA_SHIFT_PIO && ata_id_is_cfa(dev->id)) | |
2722 | err_mask &= ~AC_ERR_DEV; | |
2723 | ||
83206a29 | 2724 | if (err_mask) { |
f15a1daf TH |
2725 | ata_dev_printk(dev, KERN_ERR, "failed to set xfermode " |
2726 | "(err_mask=0x%x)\n", err_mask); | |
83206a29 TH |
2727 | return -EIO; |
2728 | } | |
1da177e4 | 2729 | |
baa1e78a | 2730 | ehc->i.flags |= ATA_EHI_POST_SETMODE; |
3373efd8 | 2731 | rc = ata_dev_revalidate(dev, 0); |
baa1e78a | 2732 | ehc->i.flags &= ~ATA_EHI_POST_SETMODE; |
5eb45c02 | 2733 | if (rc) |
83206a29 | 2734 | return rc; |
48a8a14f | 2735 | |
23e71c3d TH |
2736 | DPRINTK("xfer_shift=%u, xfer_mode=0x%x\n", |
2737 | dev->xfer_shift, (int)dev->xfer_mode); | |
1da177e4 | 2738 | |
f15a1daf TH |
2739 | ata_dev_printk(dev, KERN_INFO, "configured for %s\n", |
2740 | ata_mode_string(ata_xfer_mode2mask(dev->xfer_mode))); | |
83206a29 | 2741 | return 0; |
1da177e4 LT |
2742 | } |
2743 | ||
1da177e4 | 2744 | /** |
04351821 | 2745 | * ata_do_set_mode - Program timings and issue SET FEATURES - XFER |
1da177e4 | 2746 | * @ap: port on which timings will be programmed |
e82cbdb9 | 2747 | * @r_failed_dev: out paramter for failed device |
1da177e4 | 2748 | * |
04351821 A |
2749 | * Standard implementation of the function used to tune and set |
2750 | * ATA device disk transfer mode (PIO3, UDMA6, etc.). If | |
2751 | * ata_dev_set_mode() fails, pointer to the failing device is | |
e82cbdb9 | 2752 | * returned in @r_failed_dev. |
780a87f7 | 2753 | * |
1da177e4 | 2754 | * LOCKING: |
0cba632b | 2755 | * PCI/etc. bus probe sem. |
e82cbdb9 TH |
2756 | * |
2757 | * RETURNS: | |
2758 | * 0 on success, negative errno otherwise | |
1da177e4 | 2759 | */ |
04351821 A |
2760 | |
2761 | int ata_do_set_mode(struct ata_port *ap, struct ata_device **r_failed_dev) | |
1da177e4 | 2762 | { |
e8e0619f | 2763 | struct ata_device *dev; |
e82cbdb9 | 2764 | int i, rc = 0, used_dma = 0, found = 0; |
1da177e4 | 2765 | |
3adcebb2 | 2766 | |
a6d5a51c TH |
2767 | /* step 1: calculate xfer_mask */ |
2768 | for (i = 0; i < ATA_MAX_DEVICES; i++) { | |
acf356b1 | 2769 | unsigned int pio_mask, dma_mask; |
a6d5a51c | 2770 | |
e8e0619f TH |
2771 | dev = &ap->device[i]; |
2772 | ||
e1211e3f | 2773 | if (!ata_dev_enabled(dev)) |
a6d5a51c TH |
2774 | continue; |
2775 | ||
3373efd8 | 2776 | ata_dev_xfermask(dev); |
1da177e4 | 2777 | |
acf356b1 TH |
2778 | pio_mask = ata_pack_xfermask(dev->pio_mask, 0, 0); |
2779 | dma_mask = ata_pack_xfermask(0, dev->mwdma_mask, dev->udma_mask); | |
2780 | dev->pio_mode = ata_xfer_mask2mode(pio_mask); | |
2781 | dev->dma_mode = ata_xfer_mask2mode(dma_mask); | |
5444a6f4 | 2782 | |
4f65977d | 2783 | found = 1; |
5444a6f4 AC |
2784 | if (dev->dma_mode) |
2785 | used_dma = 1; | |
a6d5a51c | 2786 | } |
4f65977d | 2787 | if (!found) |
e82cbdb9 | 2788 | goto out; |
a6d5a51c TH |
2789 | |
2790 | /* step 2: always set host PIO timings */ | |
e8e0619f TH |
2791 | for (i = 0; i < ATA_MAX_DEVICES; i++) { |
2792 | dev = &ap->device[i]; | |
2793 | if (!ata_dev_enabled(dev)) | |
2794 | continue; | |
2795 | ||
2796 | if (!dev->pio_mode) { | |
f15a1daf | 2797 | ata_dev_printk(dev, KERN_WARNING, "no PIO support\n"); |
e8e0619f | 2798 | rc = -EINVAL; |
e82cbdb9 | 2799 | goto out; |
e8e0619f TH |
2800 | } |
2801 | ||
2802 | dev->xfer_mode = dev->pio_mode; | |
2803 | dev->xfer_shift = ATA_SHIFT_PIO; | |
2804 | if (ap->ops->set_piomode) | |
2805 | ap->ops->set_piomode(ap, dev); | |
2806 | } | |
1da177e4 | 2807 | |
a6d5a51c | 2808 | /* step 3: set host DMA timings */ |
e8e0619f TH |
2809 | for (i = 0; i < ATA_MAX_DEVICES; i++) { |
2810 | dev = &ap->device[i]; | |
2811 | ||
2812 | if (!ata_dev_enabled(dev) || !dev->dma_mode) | |
2813 | continue; | |
2814 | ||
2815 | dev->xfer_mode = dev->dma_mode; | |
2816 | dev->xfer_shift = ata_xfer_mode2shift(dev->dma_mode); | |
2817 | if (ap->ops->set_dmamode) | |
2818 | ap->ops->set_dmamode(ap, dev); | |
2819 | } | |
1da177e4 LT |
2820 | |
2821 | /* step 4: update devices' xfer mode */ | |
83206a29 | 2822 | for (i = 0; i < ATA_MAX_DEVICES; i++) { |
e8e0619f | 2823 | dev = &ap->device[i]; |
1da177e4 | 2824 | |
18d90deb | 2825 | /* don't update suspended devices' xfer mode */ |
02670bf3 | 2826 | if (!ata_dev_ready(dev)) |
83206a29 TH |
2827 | continue; |
2828 | ||
3373efd8 | 2829 | rc = ata_dev_set_mode(dev); |
5bbc53f4 | 2830 | if (rc) |
e82cbdb9 | 2831 | goto out; |
83206a29 | 2832 | } |
1da177e4 | 2833 | |
e8e0619f TH |
2834 | /* Record simplex status. If we selected DMA then the other |
2835 | * host channels are not permitted to do so. | |
5444a6f4 | 2836 | */ |
cca3974e | 2837 | if (used_dma && (ap->host->flags & ATA_HOST_SIMPLEX)) |
032af1ce | 2838 | ap->host->simplex_claimed = ap; |
5444a6f4 | 2839 | |
e8e0619f | 2840 | /* step5: chip specific finalisation */ |
1da177e4 LT |
2841 | if (ap->ops->post_set_mode) |
2842 | ap->ops->post_set_mode(ap); | |
e82cbdb9 TH |
2843 | out: |
2844 | if (rc) | |
2845 | *r_failed_dev = dev; | |
2846 | return rc; | |
1da177e4 LT |
2847 | } |
2848 | ||
04351821 A |
2849 | /** |
2850 | * ata_set_mode - Program timings and issue SET FEATURES - XFER | |
2851 | * @ap: port on which timings will be programmed | |
2852 | * @r_failed_dev: out paramter for failed device | |
2853 | * | |
2854 | * Set ATA device disk transfer mode (PIO3, UDMA6, etc.). If | |
2855 | * ata_set_mode() fails, pointer to the failing device is | |
2856 | * returned in @r_failed_dev. | |
2857 | * | |
2858 | * LOCKING: | |
2859 | * PCI/etc. bus probe sem. | |
2860 | * | |
2861 | * RETURNS: | |
2862 | * 0 on success, negative errno otherwise | |
2863 | */ | |
2864 | int ata_set_mode(struct ata_port *ap, struct ata_device **r_failed_dev) | |
2865 | { | |
2866 | /* has private set_mode? */ | |
2867 | if (ap->ops->set_mode) | |
2868 | return ap->ops->set_mode(ap, r_failed_dev); | |
2869 | return ata_do_set_mode(ap, r_failed_dev); | |
2870 | } | |
2871 | ||
1fdffbce JG |
2872 | /** |
2873 | * ata_tf_to_host - issue ATA taskfile to host controller | |
2874 | * @ap: port to which command is being issued | |
2875 | * @tf: ATA taskfile register set | |
2876 | * | |
2877 | * Issues ATA taskfile register set to ATA host controller, | |
2878 | * with proper synchronization with interrupt handler and | |
2879 | * other threads. | |
2880 | * | |
2881 | * LOCKING: | |
cca3974e | 2882 | * spin_lock_irqsave(host lock) |
1fdffbce JG |
2883 | */ |
2884 | ||
2885 | static inline void ata_tf_to_host(struct ata_port *ap, | |
2886 | const struct ata_taskfile *tf) | |
2887 | { | |
2888 | ap->ops->tf_load(ap, tf); | |
2889 | ap->ops->exec_command(ap, tf); | |
2890 | } | |
2891 | ||
1da177e4 LT |
2892 | /** |
2893 | * ata_busy_sleep - sleep until BSY clears, or timeout | |
2894 | * @ap: port containing status register to be polled | |
2895 | * @tmout_pat: impatience timeout | |
2896 | * @tmout: overall timeout | |
2897 | * | |
780a87f7 JG |
2898 | * Sleep until ATA Status register bit BSY clears, |
2899 | * or a timeout occurs. | |
2900 | * | |
d1adc1bb TH |
2901 | * LOCKING: |
2902 | * Kernel thread context (may sleep). | |
2903 | * | |
2904 | * RETURNS: | |
2905 | * 0 on success, -errno otherwise. | |
1da177e4 | 2906 | */ |
d1adc1bb TH |
2907 | int ata_busy_sleep(struct ata_port *ap, |
2908 | unsigned long tmout_pat, unsigned long tmout) | |
1da177e4 LT |
2909 | { |
2910 | unsigned long timer_start, timeout; | |
2911 | u8 status; | |
2912 | ||
2913 | status = ata_busy_wait(ap, ATA_BUSY, 300); | |
2914 | timer_start = jiffies; | |
2915 | timeout = timer_start + tmout_pat; | |
d1adc1bb TH |
2916 | while (status != 0xff && (status & ATA_BUSY) && |
2917 | time_before(jiffies, timeout)) { | |
1da177e4 LT |
2918 | msleep(50); |
2919 | status = ata_busy_wait(ap, ATA_BUSY, 3); | |
2920 | } | |
2921 | ||
d1adc1bb | 2922 | if (status != 0xff && (status & ATA_BUSY)) |
f15a1daf | 2923 | ata_port_printk(ap, KERN_WARNING, |
35aa7a43 JG |
2924 | "port is slow to respond, please be patient " |
2925 | "(Status 0x%x)\n", status); | |
1da177e4 LT |
2926 | |
2927 | timeout = timer_start + tmout; | |
d1adc1bb TH |
2928 | while (status != 0xff && (status & ATA_BUSY) && |
2929 | time_before(jiffies, timeout)) { | |
1da177e4 LT |
2930 | msleep(50); |
2931 | status = ata_chk_status(ap); | |
2932 | } | |
2933 | ||
d1adc1bb TH |
2934 | if (status == 0xff) |
2935 | return -ENODEV; | |
2936 | ||
1da177e4 | 2937 | if (status & ATA_BUSY) { |
f15a1daf | 2938 | ata_port_printk(ap, KERN_ERR, "port failed to respond " |
35aa7a43 JG |
2939 | "(%lu secs, Status 0x%x)\n", |
2940 | tmout / HZ, status); | |
d1adc1bb | 2941 | return -EBUSY; |
1da177e4 LT |
2942 | } |
2943 | ||
2944 | return 0; | |
2945 | } | |
2946 | ||
2947 | static void ata_bus_post_reset(struct ata_port *ap, unsigned int devmask) | |
2948 | { | |
2949 | struct ata_ioports *ioaddr = &ap->ioaddr; | |
2950 | unsigned int dev0 = devmask & (1 << 0); | |
2951 | unsigned int dev1 = devmask & (1 << 1); | |
2952 | unsigned long timeout; | |
2953 | ||
2954 | /* if device 0 was found in ata_devchk, wait for its | |
2955 | * BSY bit to clear | |
2956 | */ | |
2957 | if (dev0) | |
2958 | ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT); | |
2959 | ||
2960 | /* if device 1 was found in ata_devchk, wait for | |
2961 | * register access, then wait for BSY to clear | |
2962 | */ | |
2963 | timeout = jiffies + ATA_TMOUT_BOOT; | |
2964 | while (dev1) { | |
2965 | u8 nsect, lbal; | |
2966 | ||
2967 | ap->ops->dev_select(ap, 1); | |
0d5ff566 TH |
2968 | nsect = ioread8(ioaddr->nsect_addr); |
2969 | lbal = ioread8(ioaddr->lbal_addr); | |
1da177e4 LT |
2970 | if ((nsect == 1) && (lbal == 1)) |
2971 | break; | |
2972 | if (time_after(jiffies, timeout)) { | |
2973 | dev1 = 0; | |
2974 | break; | |
2975 | } | |
2976 | msleep(50); /* give drive a breather */ | |
2977 | } | |
2978 | if (dev1) | |
2979 | ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT); | |
2980 | ||
2981 | /* is all this really necessary? */ | |
2982 | ap->ops->dev_select(ap, 0); | |
2983 | if (dev1) | |
2984 | ap->ops->dev_select(ap, 1); | |
2985 | if (dev0) | |
2986 | ap->ops->dev_select(ap, 0); | |
2987 | } | |
2988 | ||
1da177e4 LT |
2989 | static unsigned int ata_bus_softreset(struct ata_port *ap, |
2990 | unsigned int devmask) | |
2991 | { | |
2992 | struct ata_ioports *ioaddr = &ap->ioaddr; | |
2993 | ||
44877b4e | 2994 | DPRINTK("ata%u: bus reset via SRST\n", ap->print_id); |
1da177e4 LT |
2995 | |
2996 | /* software reset. causes dev0 to be selected */ | |
0d5ff566 TH |
2997 | iowrite8(ap->ctl, ioaddr->ctl_addr); |
2998 | udelay(20); /* FIXME: flush */ | |
2999 | iowrite8(ap->ctl | ATA_SRST, ioaddr->ctl_addr); | |
3000 | udelay(20); /* FIXME: flush */ | |
3001 | iowrite8(ap->ctl, ioaddr->ctl_addr); | |
1da177e4 LT |
3002 | |
3003 | /* spec mandates ">= 2ms" before checking status. | |
3004 | * We wait 150ms, because that was the magic delay used for | |
3005 | * ATAPI devices in Hale Landis's ATADRVR, for the period of time | |
3006 | * between when the ATA command register is written, and then | |
3007 | * status is checked. Because waiting for "a while" before | |
3008 | * checking status is fine, post SRST, we perform this magic | |
3009 | * delay here as well. | |
09c7ad79 AC |
3010 | * |
3011 | * Old drivers/ide uses the 2mS rule and then waits for ready | |
1da177e4 LT |
3012 | */ |
3013 | msleep(150); | |
3014 | ||
2e9edbf8 | 3015 | /* Before we perform post reset processing we want to see if |
298a41ca TH |
3016 | * the bus shows 0xFF because the odd clown forgets the D7 |
3017 | * pulldown resistor. | |
3018 | */ | |
d1adc1bb TH |
3019 | if (ata_check_status(ap) == 0xFF) |
3020 | return 0; | |
09c7ad79 | 3021 | |
1da177e4 LT |
3022 | ata_bus_post_reset(ap, devmask); |
3023 | ||
3024 | return 0; | |
3025 | } | |
3026 | ||
3027 | /** | |
3028 | * ata_bus_reset - reset host port and associated ATA channel | |
3029 | * @ap: port to reset | |
3030 | * | |
3031 | * This is typically the first time we actually start issuing | |
3032 | * commands to the ATA channel. We wait for BSY to clear, then | |
3033 | * issue EXECUTE DEVICE DIAGNOSTIC command, polling for its | |
3034 | * result. Determine what devices, if any, are on the channel | |
3035 | * by looking at the device 0/1 error register. Look at the signature | |
3036 | * stored in each device's taskfile registers, to determine if | |
3037 | * the device is ATA or ATAPI. | |
3038 | * | |
3039 | * LOCKING: | |
0cba632b | 3040 | * PCI/etc. bus probe sem. |
cca3974e | 3041 | * Obtains host lock. |
1da177e4 LT |
3042 | * |
3043 | * SIDE EFFECTS: | |
198e0fed | 3044 | * Sets ATA_FLAG_DISABLED if bus reset fails. |
1da177e4 LT |
3045 | */ |
3046 | ||
3047 | void ata_bus_reset(struct ata_port *ap) | |
3048 | { | |
3049 | struct ata_ioports *ioaddr = &ap->ioaddr; | |
3050 | unsigned int slave_possible = ap->flags & ATA_FLAG_SLAVE_POSS; | |
3051 | u8 err; | |
aec5c3c1 | 3052 | unsigned int dev0, dev1 = 0, devmask = 0; |
1da177e4 | 3053 | |
44877b4e | 3054 | DPRINTK("ENTER, host %u, port %u\n", ap->print_id, ap->port_no); |
1da177e4 LT |
3055 | |
3056 | /* determine if device 0/1 are present */ | |
3057 | if (ap->flags & ATA_FLAG_SATA_RESET) | |
3058 | dev0 = 1; | |
3059 | else { | |
3060 | dev0 = ata_devchk(ap, 0); | |
3061 | if (slave_possible) | |
3062 | dev1 = ata_devchk(ap, 1); | |
3063 | } | |
3064 | ||
3065 | if (dev0) | |
3066 | devmask |= (1 << 0); | |
3067 | if (dev1) | |
3068 | devmask |= (1 << 1); | |
3069 | ||
3070 | /* select device 0 again */ | |
3071 | ap->ops->dev_select(ap, 0); | |
3072 | ||
3073 | /* issue bus reset */ | |
3074 | if (ap->flags & ATA_FLAG_SRST) | |
aec5c3c1 TH |
3075 | if (ata_bus_softreset(ap, devmask)) |
3076 | goto err_out; | |
1da177e4 LT |
3077 | |
3078 | /* | |
3079 | * determine by signature whether we have ATA or ATAPI devices | |
3080 | */ | |
b4dc7623 | 3081 | ap->device[0].class = ata_dev_try_classify(ap, 0, &err); |
1da177e4 | 3082 | if ((slave_possible) && (err != 0x81)) |
b4dc7623 | 3083 | ap->device[1].class = ata_dev_try_classify(ap, 1, &err); |
1da177e4 LT |
3084 | |
3085 | /* re-enable interrupts */ | |
83625006 | 3086 | ap->ops->irq_on(ap); |
1da177e4 LT |
3087 | |
3088 | /* is double-select really necessary? */ | |
3089 | if (ap->device[1].class != ATA_DEV_NONE) | |
3090 | ap->ops->dev_select(ap, 1); | |
3091 | if (ap->device[0].class != ATA_DEV_NONE) | |
3092 | ap->ops->dev_select(ap, 0); | |
3093 | ||
3094 | /* if no devices were detected, disable this port */ | |
3095 | if ((ap->device[0].class == ATA_DEV_NONE) && | |
3096 | (ap->device[1].class == ATA_DEV_NONE)) | |
3097 | goto err_out; | |
3098 | ||
3099 | if (ap->flags & (ATA_FLAG_SATA_RESET | ATA_FLAG_SRST)) { | |
3100 | /* set up device control for ATA_FLAG_SATA_RESET */ | |
0d5ff566 | 3101 | iowrite8(ap->ctl, ioaddr->ctl_addr); |
1da177e4 LT |
3102 | } |
3103 | ||
3104 | DPRINTK("EXIT\n"); | |
3105 | return; | |
3106 | ||
3107 | err_out: | |
f15a1daf | 3108 | ata_port_printk(ap, KERN_ERR, "disabling port\n"); |
1da177e4 LT |
3109 | ap->ops->port_disable(ap); |
3110 | ||
3111 | DPRINTK("EXIT\n"); | |
3112 | } | |
3113 | ||
d7bb4cc7 TH |
3114 | /** |
3115 | * sata_phy_debounce - debounce SATA phy status | |
3116 | * @ap: ATA port to debounce SATA phy status for | |
3117 | * @params: timing parameters { interval, duratinon, timeout } in msec | |
3118 | * | |
3119 | * Make sure SStatus of @ap reaches stable state, determined by | |
3120 | * holding the same value where DET is not 1 for @duration polled | |
3121 | * every @interval, before @timeout. Timeout constraints the | |
3122 | * beginning of the stable state. Because, after hot unplugging, | |
3123 | * DET gets stuck at 1 on some controllers, this functions waits | |
3124 | * until timeout then returns 0 if DET is stable at 1. | |
3125 | * | |
3126 | * LOCKING: | |
3127 | * Kernel thread context (may sleep) | |
3128 | * | |
3129 | * RETURNS: | |
3130 | * 0 on success, -errno on failure. | |
3131 | */ | |
3132 | int sata_phy_debounce(struct ata_port *ap, const unsigned long *params) | |
7a7921e8 | 3133 | { |
d7bb4cc7 TH |
3134 | unsigned long interval_msec = params[0]; |
3135 | unsigned long duration = params[1] * HZ / 1000; | |
3136 | unsigned long timeout = jiffies + params[2] * HZ / 1000; | |
3137 | unsigned long last_jiffies; | |
3138 | u32 last, cur; | |
3139 | int rc; | |
3140 | ||
3141 | if ((rc = sata_scr_read(ap, SCR_STATUS, &cur))) | |
3142 | return rc; | |
3143 | cur &= 0xf; | |
3144 | ||
3145 | last = cur; | |
3146 | last_jiffies = jiffies; | |
3147 | ||
3148 | while (1) { | |
3149 | msleep(interval_msec); | |
3150 | if ((rc = sata_scr_read(ap, SCR_STATUS, &cur))) | |
3151 | return rc; | |
3152 | cur &= 0xf; | |
3153 | ||
3154 | /* DET stable? */ | |
3155 | if (cur == last) { | |
3156 | if (cur == 1 && time_before(jiffies, timeout)) | |
3157 | continue; | |
3158 | if (time_after(jiffies, last_jiffies + duration)) | |
3159 | return 0; | |
3160 | continue; | |
3161 | } | |
3162 | ||
3163 | /* unstable, start over */ | |
3164 | last = cur; | |
3165 | last_jiffies = jiffies; | |
3166 | ||
3167 | /* check timeout */ | |
3168 | if (time_after(jiffies, timeout)) | |
3169 | return -EBUSY; | |
3170 | } | |
3171 | } | |
3172 | ||
3173 | /** | |
3174 | * sata_phy_resume - resume SATA phy | |
3175 | * @ap: ATA port to resume SATA phy for | |
3176 | * @params: timing parameters { interval, duratinon, timeout } in msec | |
3177 | * | |
3178 | * Resume SATA phy of @ap and debounce it. | |
3179 | * | |
3180 | * LOCKING: | |
3181 | * Kernel thread context (may sleep) | |
3182 | * | |
3183 | * RETURNS: | |
3184 | * 0 on success, -errno on failure. | |
3185 | */ | |
3186 | int sata_phy_resume(struct ata_port *ap, const unsigned long *params) | |
3187 | { | |
3188 | u32 scontrol; | |
81952c54 TH |
3189 | int rc; |
3190 | ||
3191 | if ((rc = sata_scr_read(ap, SCR_CONTROL, &scontrol))) | |
3192 | return rc; | |
7a7921e8 | 3193 | |
852ee16a | 3194 | scontrol = (scontrol & 0x0f0) | 0x300; |
81952c54 TH |
3195 | |
3196 | if ((rc = sata_scr_write(ap, SCR_CONTROL, scontrol))) | |
3197 | return rc; | |
7a7921e8 | 3198 | |
d7bb4cc7 TH |
3199 | /* Some PHYs react badly if SStatus is pounded immediately |
3200 | * after resuming. Delay 200ms before debouncing. | |
3201 | */ | |
3202 | msleep(200); | |
7a7921e8 | 3203 | |
d7bb4cc7 | 3204 | return sata_phy_debounce(ap, params); |
7a7921e8 TH |
3205 | } |
3206 | ||
f5914a46 TH |
3207 | static void ata_wait_spinup(struct ata_port *ap) |
3208 | { | |
3209 | struct ata_eh_context *ehc = &ap->eh_context; | |
3210 | unsigned long end, secs; | |
3211 | int rc; | |
3212 | ||
3213 | /* first, debounce phy if SATA */ | |
3214 | if (ap->cbl == ATA_CBL_SATA) { | |
e9c83914 | 3215 | rc = sata_phy_debounce(ap, sata_deb_timing_hotplug); |
f5914a46 TH |
3216 | |
3217 | /* if debounced successfully and offline, no need to wait */ | |
3218 | if ((rc == 0 || rc == -EOPNOTSUPP) && ata_port_offline(ap)) | |
3219 | return; | |
3220 | } | |
3221 | ||
3222 | /* okay, let's give the drive time to spin up */ | |
3223 | end = ehc->i.hotplug_timestamp + ATA_SPINUP_WAIT * HZ / 1000; | |
3224 | secs = ((end - jiffies) + HZ - 1) / HZ; | |
3225 | ||
3226 | if (time_after(jiffies, end)) | |
3227 | return; | |
3228 | ||
3229 | if (secs > 5) | |
3230 | ata_port_printk(ap, KERN_INFO, "waiting for device to spin up " | |
3231 | "(%lu secs)\n", secs); | |
3232 | ||
3233 | schedule_timeout_uninterruptible(end - jiffies); | |
3234 | } | |
3235 | ||
3236 | /** | |
3237 | * ata_std_prereset - prepare for reset | |
3238 | * @ap: ATA port to be reset | |
3239 | * | |
3240 | * @ap is about to be reset. Initialize it. | |
3241 | * | |
3242 | * LOCKING: | |
3243 | * Kernel thread context (may sleep) | |
3244 | * | |
3245 | * RETURNS: | |
3246 | * 0 on success, -errno otherwise. | |
3247 | */ | |
3248 | int ata_std_prereset(struct ata_port *ap) | |
3249 | { | |
3250 | struct ata_eh_context *ehc = &ap->eh_context; | |
e9c83914 | 3251 | const unsigned long *timing = sata_ehc_deb_timing(ehc); |
f5914a46 TH |
3252 | int rc; |
3253 | ||
28324304 TH |
3254 | /* handle link resume & hotplug spinup */ |
3255 | if ((ehc->i.flags & ATA_EHI_RESUME_LINK) && | |
3256 | (ap->flags & ATA_FLAG_HRST_TO_RESUME)) | |
3257 | ehc->i.action |= ATA_EH_HARDRESET; | |
3258 | ||
3259 | if ((ehc->i.flags & ATA_EHI_HOTPLUGGED) && | |
3260 | (ap->flags & ATA_FLAG_SKIP_D2H_BSY)) | |
3261 | ata_wait_spinup(ap); | |
f5914a46 TH |
3262 | |
3263 | /* if we're about to do hardreset, nothing more to do */ | |
3264 | if (ehc->i.action & ATA_EH_HARDRESET) | |
3265 | return 0; | |
3266 | ||
3267 | /* if SATA, resume phy */ | |
3268 | if (ap->cbl == ATA_CBL_SATA) { | |
f5914a46 TH |
3269 | rc = sata_phy_resume(ap, timing); |
3270 | if (rc && rc != -EOPNOTSUPP) { | |
3271 | /* phy resume failed */ | |
3272 | ata_port_printk(ap, KERN_WARNING, "failed to resume " | |
3273 | "link for reset (errno=%d)\n", rc); | |
3274 | return rc; | |
3275 | } | |
3276 | } | |
3277 | ||
3278 | /* Wait for !BSY if the controller can wait for the first D2H | |
3279 | * Reg FIS and we don't know that no device is attached. | |
3280 | */ | |
3281 | if (!(ap->flags & ATA_FLAG_SKIP_D2H_BSY) && !ata_port_offline(ap)) | |
3282 | ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT); | |
3283 | ||
3284 | return 0; | |
3285 | } | |
3286 | ||
c2bd5804 TH |
3287 | /** |
3288 | * ata_std_softreset - reset host port via ATA SRST | |
3289 | * @ap: port to reset | |
c2bd5804 TH |
3290 | * @classes: resulting classes of attached devices |
3291 | * | |
52783c5d | 3292 | * Reset host port using ATA SRST. |
c2bd5804 TH |
3293 | * |
3294 | * LOCKING: | |
3295 | * Kernel thread context (may sleep) | |
3296 | * | |
3297 | * RETURNS: | |
3298 | * 0 on success, -errno otherwise. | |
3299 | */ | |
2bf2cb26 | 3300 | int ata_std_softreset(struct ata_port *ap, unsigned int *classes) |
c2bd5804 TH |
3301 | { |
3302 | unsigned int slave_possible = ap->flags & ATA_FLAG_SLAVE_POSS; | |
3303 | unsigned int devmask = 0, err_mask; | |
3304 | u8 err; | |
3305 | ||
3306 | DPRINTK("ENTER\n"); | |
3307 | ||
81952c54 | 3308 | if (ata_port_offline(ap)) { |
3a39746a TH |
3309 | classes[0] = ATA_DEV_NONE; |
3310 | goto out; | |
3311 | } | |
3312 | ||
c2bd5804 TH |
3313 | /* determine if device 0/1 are present */ |
3314 | if (ata_devchk(ap, 0)) | |
3315 | devmask |= (1 << 0); | |
3316 | if (slave_possible && ata_devchk(ap, 1)) | |
3317 | devmask |= (1 << 1); | |
3318 | ||
c2bd5804 TH |
3319 | /* select device 0 again */ |
3320 | ap->ops->dev_select(ap, 0); | |
3321 | ||
3322 | /* issue bus reset */ | |
3323 | DPRINTK("about to softreset, devmask=%x\n", devmask); | |
3324 | err_mask = ata_bus_softreset(ap, devmask); | |
3325 | if (err_mask) { | |
f15a1daf TH |
3326 | ata_port_printk(ap, KERN_ERR, "SRST failed (err_mask=0x%x)\n", |
3327 | err_mask); | |
c2bd5804 TH |
3328 | return -EIO; |
3329 | } | |
3330 | ||
3331 | /* determine by signature whether we have ATA or ATAPI devices */ | |
3332 | classes[0] = ata_dev_try_classify(ap, 0, &err); | |
3333 | if (slave_possible && err != 0x81) | |
3334 | classes[1] = ata_dev_try_classify(ap, 1, &err); | |
3335 | ||
3a39746a | 3336 | out: |
c2bd5804 TH |
3337 | DPRINTK("EXIT, classes[0]=%u [1]=%u\n", classes[0], classes[1]); |
3338 | return 0; | |
3339 | } | |
3340 | ||
3341 | /** | |
b6103f6d | 3342 | * sata_port_hardreset - reset port via SATA phy reset |
c2bd5804 | 3343 | * @ap: port to reset |
b6103f6d | 3344 | * @timing: timing parameters { interval, duratinon, timeout } in msec |
c2bd5804 TH |
3345 | * |
3346 | * SATA phy-reset host port using DET bits of SControl register. | |
c2bd5804 TH |
3347 | * |
3348 | * LOCKING: | |
3349 | * Kernel thread context (may sleep) | |
3350 | * | |
3351 | * RETURNS: | |
3352 | * 0 on success, -errno otherwise. | |
3353 | */ | |
b6103f6d | 3354 | int sata_port_hardreset(struct ata_port *ap, const unsigned long *timing) |
c2bd5804 | 3355 | { |
852ee16a | 3356 | u32 scontrol; |
81952c54 | 3357 | int rc; |
852ee16a | 3358 | |
c2bd5804 TH |
3359 | DPRINTK("ENTER\n"); |
3360 | ||
3c567b7d | 3361 | if (sata_set_spd_needed(ap)) { |
1c3fae4d TH |
3362 | /* SATA spec says nothing about how to reconfigure |
3363 | * spd. To be on the safe side, turn off phy during | |
3364 | * reconfiguration. This works for at least ICH7 AHCI | |
3365 | * and Sil3124. | |
3366 | */ | |
81952c54 | 3367 | if ((rc = sata_scr_read(ap, SCR_CONTROL, &scontrol))) |
b6103f6d | 3368 | goto out; |
81952c54 | 3369 | |
a34b6fc0 | 3370 | scontrol = (scontrol & 0x0f0) | 0x304; |
81952c54 TH |
3371 | |
3372 | if ((rc = sata_scr_write(ap, SCR_CONTROL, scontrol))) | |
b6103f6d | 3373 | goto out; |
1c3fae4d | 3374 | |
3c567b7d | 3375 | sata_set_spd(ap); |
1c3fae4d TH |
3376 | } |
3377 | ||
3378 | /* issue phy wake/reset */ | |
81952c54 | 3379 | if ((rc = sata_scr_read(ap, SCR_CONTROL, &scontrol))) |
b6103f6d | 3380 | goto out; |
81952c54 | 3381 | |
852ee16a | 3382 | scontrol = (scontrol & 0x0f0) | 0x301; |
81952c54 TH |
3383 | |
3384 | if ((rc = sata_scr_write_flush(ap, SCR_CONTROL, scontrol))) | |
b6103f6d | 3385 | goto out; |
c2bd5804 | 3386 | |
1c3fae4d | 3387 | /* Couldn't find anything in SATA I/II specs, but AHCI-1.1 |
c2bd5804 TH |
3388 | * 10.4.2 says at least 1 ms. |
3389 | */ | |
3390 | msleep(1); | |
3391 | ||
1c3fae4d | 3392 | /* bring phy back */ |
b6103f6d TH |
3393 | rc = sata_phy_resume(ap, timing); |
3394 | out: | |
3395 | DPRINTK("EXIT, rc=%d\n", rc); | |
3396 | return rc; | |
3397 | } | |
3398 | ||
3399 | /** | |
3400 | * sata_std_hardreset - reset host port via SATA phy reset | |
3401 | * @ap: port to reset | |
3402 | * @class: resulting class of attached device | |
3403 | * | |
3404 | * SATA phy-reset host port using DET bits of SControl register, | |
3405 | * wait for !BSY and classify the attached device. | |
3406 | * | |
3407 | * LOCKING: | |
3408 | * Kernel thread context (may sleep) | |
3409 | * | |
3410 | * RETURNS: | |
3411 | * 0 on success, -errno otherwise. | |
3412 | */ | |
3413 | int sata_std_hardreset(struct ata_port *ap, unsigned int *class) | |
3414 | { | |
3415 | const unsigned long *timing = sata_ehc_deb_timing(&ap->eh_context); | |
3416 | int rc; | |
3417 | ||
3418 | DPRINTK("ENTER\n"); | |
3419 | ||
3420 | /* do hardreset */ | |
3421 | rc = sata_port_hardreset(ap, timing); | |
3422 | if (rc) { | |
3423 | ata_port_printk(ap, KERN_ERR, | |
3424 | "COMRESET failed (errno=%d)\n", rc); | |
3425 | return rc; | |
3426 | } | |
c2bd5804 | 3427 | |
c2bd5804 | 3428 | /* TODO: phy layer with polling, timeouts, etc. */ |
81952c54 | 3429 | if (ata_port_offline(ap)) { |
c2bd5804 TH |
3430 | *class = ATA_DEV_NONE; |
3431 | DPRINTK("EXIT, link offline\n"); | |
3432 | return 0; | |
3433 | } | |
3434 | ||
34fee227 TH |
3435 | /* wait a while before checking status, see SRST for more info */ |
3436 | msleep(150); | |
3437 | ||
c2bd5804 | 3438 | if (ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT)) { |
f15a1daf TH |
3439 | ata_port_printk(ap, KERN_ERR, |
3440 | "COMRESET failed (device not ready)\n"); | |
c2bd5804 TH |
3441 | return -EIO; |
3442 | } | |
3443 | ||
3a39746a TH |
3444 | ap->ops->dev_select(ap, 0); /* probably unnecessary */ |
3445 | ||
c2bd5804 TH |
3446 | *class = ata_dev_try_classify(ap, 0, NULL); |
3447 | ||
3448 | DPRINTK("EXIT, class=%u\n", *class); | |
3449 | return 0; | |
3450 | } | |
3451 | ||
3452 | /** | |
3453 | * ata_std_postreset - standard postreset callback | |
3454 | * @ap: the target ata_port | |
3455 | * @classes: classes of attached devices | |
3456 | * | |
3457 | * This function is invoked after a successful reset. Note that | |
3458 | * the device might have been reset more than once using | |
3459 | * different reset methods before postreset is invoked. | |
c2bd5804 | 3460 | * |
c2bd5804 TH |
3461 | * LOCKING: |
3462 | * Kernel thread context (may sleep) | |
3463 | */ | |
3464 | void ata_std_postreset(struct ata_port *ap, unsigned int *classes) | |
3465 | { | |
dc2b3515 TH |
3466 | u32 serror; |
3467 | ||
c2bd5804 TH |
3468 | DPRINTK("ENTER\n"); |
3469 | ||
c2bd5804 | 3470 | /* print link status */ |
81952c54 | 3471 | sata_print_link_status(ap); |
c2bd5804 | 3472 | |
dc2b3515 TH |
3473 | /* clear SError */ |
3474 | if (sata_scr_read(ap, SCR_ERROR, &serror) == 0) | |
3475 | sata_scr_write(ap, SCR_ERROR, serror); | |
3476 | ||
3a39746a | 3477 | /* re-enable interrupts */ |
83625006 AI |
3478 | if (!ap->ops->error_handler) |
3479 | ap->ops->irq_on(ap); | |
c2bd5804 TH |
3480 | |
3481 | /* is double-select really necessary? */ | |
3482 | if (classes[0] != ATA_DEV_NONE) | |
3483 | ap->ops->dev_select(ap, 1); | |
3484 | if (classes[1] != ATA_DEV_NONE) | |
3485 | ap->ops->dev_select(ap, 0); | |
3486 | ||
3a39746a TH |
3487 | /* bail out if no device is present */ |
3488 | if (classes[0] == ATA_DEV_NONE && classes[1] == ATA_DEV_NONE) { | |
3489 | DPRINTK("EXIT, no device\n"); | |
3490 | return; | |
3491 | } | |
3492 | ||
3493 | /* set up device control */ | |
0d5ff566 TH |
3494 | if (ap->ioaddr.ctl_addr) |
3495 | iowrite8(ap->ctl, ap->ioaddr.ctl_addr); | |
c2bd5804 TH |
3496 | |
3497 | DPRINTK("EXIT\n"); | |
3498 | } | |
3499 | ||
623a3128 TH |
3500 | /** |
3501 | * ata_dev_same_device - Determine whether new ID matches configured device | |
623a3128 TH |
3502 | * @dev: device to compare against |
3503 | * @new_class: class of the new device | |
3504 | * @new_id: IDENTIFY page of the new device | |
3505 | * | |
3506 | * Compare @new_class and @new_id against @dev and determine | |
3507 | * whether @dev is the device indicated by @new_class and | |
3508 | * @new_id. | |
3509 | * | |
3510 | * LOCKING: | |
3511 | * None. | |
3512 | * | |
3513 | * RETURNS: | |
3514 | * 1 if @dev matches @new_class and @new_id, 0 otherwise. | |
3515 | */ | |
3373efd8 TH |
3516 | static int ata_dev_same_device(struct ata_device *dev, unsigned int new_class, |
3517 | const u16 *new_id) | |
623a3128 TH |
3518 | { |
3519 | const u16 *old_id = dev->id; | |
a0cf733b TH |
3520 | unsigned char model[2][ATA_ID_PROD_LEN + 1]; |
3521 | unsigned char serial[2][ATA_ID_SERNO_LEN + 1]; | |
623a3128 TH |
3522 | u64 new_n_sectors; |
3523 | ||
3524 | if (dev->class != new_class) { | |
f15a1daf TH |
3525 | ata_dev_printk(dev, KERN_INFO, "class mismatch %d != %d\n", |
3526 | dev->class, new_class); | |
623a3128 TH |
3527 | return 0; |
3528 | } | |
3529 | ||
a0cf733b TH |
3530 | ata_id_c_string(old_id, model[0], ATA_ID_PROD, sizeof(model[0])); |
3531 | ata_id_c_string(new_id, model[1], ATA_ID_PROD, sizeof(model[1])); | |
3532 | ata_id_c_string(old_id, serial[0], ATA_ID_SERNO, sizeof(serial[0])); | |
3533 | ata_id_c_string(new_id, serial[1], ATA_ID_SERNO, sizeof(serial[1])); | |
623a3128 TH |
3534 | new_n_sectors = ata_id_n_sectors(new_id); |
3535 | ||
3536 | if (strcmp(model[0], model[1])) { | |
f15a1daf TH |
3537 | ata_dev_printk(dev, KERN_INFO, "model number mismatch " |
3538 | "'%s' != '%s'\n", model[0], model[1]); | |
623a3128 TH |
3539 | return 0; |
3540 | } | |
3541 | ||
3542 | if (strcmp(serial[0], serial[1])) { | |
f15a1daf TH |
3543 | ata_dev_printk(dev, KERN_INFO, "serial number mismatch " |
3544 | "'%s' != '%s'\n", serial[0], serial[1]); | |
623a3128 TH |
3545 | return 0; |
3546 | } | |
3547 | ||
3548 | if (dev->class == ATA_DEV_ATA && dev->n_sectors != new_n_sectors) { | |
f15a1daf TH |
3549 | ata_dev_printk(dev, KERN_INFO, "n_sectors mismatch " |
3550 | "%llu != %llu\n", | |
3551 | (unsigned long long)dev->n_sectors, | |
3552 | (unsigned long long)new_n_sectors); | |
1e999736 AC |
3553 | /* Are we the boot time size - if so we appear to be the |
3554 | same disk at this point and our HPA got reapplied */ | |
3555 | if (ata_ignore_hpa && dev->n_sectors_boot == new_n_sectors | |
3556 | && ata_id_hpa_enabled(new_id)) | |
3557 | return 1; | |
623a3128 TH |
3558 | return 0; |
3559 | } | |
3560 | ||
3561 | return 1; | |
3562 | } | |
3563 | ||
3564 | /** | |
3565 | * ata_dev_revalidate - Revalidate ATA device | |
623a3128 | 3566 | * @dev: device to revalidate |
bff04647 | 3567 | * @readid_flags: read ID flags |
623a3128 TH |
3568 | * |
3569 | * Re-read IDENTIFY page and make sure @dev is still attached to | |
3570 | * the port. | |
3571 | * | |
3572 | * LOCKING: | |
3573 | * Kernel thread context (may sleep) | |
3574 | * | |
3575 | * RETURNS: | |
3576 | * 0 on success, negative errno otherwise | |
3577 | */ | |
bff04647 | 3578 | int ata_dev_revalidate(struct ata_device *dev, unsigned int readid_flags) |
623a3128 | 3579 | { |
5eb45c02 | 3580 | unsigned int class = dev->class; |
f15a1daf | 3581 | u16 *id = (void *)dev->ap->sector_buf; |
623a3128 TH |
3582 | int rc; |
3583 | ||
5eb45c02 TH |
3584 | if (!ata_dev_enabled(dev)) { |
3585 | rc = -ENODEV; | |
3586 | goto fail; | |
3587 | } | |
623a3128 | 3588 | |
fe635c7e | 3589 | /* read ID data */ |
bff04647 | 3590 | rc = ata_dev_read_id(dev, &class, readid_flags, id); |
623a3128 TH |
3591 | if (rc) |
3592 | goto fail; | |
3593 | ||
3594 | /* is the device still there? */ | |
3373efd8 | 3595 | if (!ata_dev_same_device(dev, class, id)) { |
623a3128 TH |
3596 | rc = -ENODEV; |
3597 | goto fail; | |
3598 | } | |
3599 | ||
fe635c7e | 3600 | memcpy(dev->id, id, sizeof(id[0]) * ATA_ID_WORDS); |
623a3128 TH |
3601 | |
3602 | /* configure device according to the new ID */ | |
efdaedc4 | 3603 | rc = ata_dev_configure(dev); |
5eb45c02 TH |
3604 | if (rc == 0) |
3605 | return 0; | |
623a3128 TH |
3606 | |
3607 | fail: | |
f15a1daf | 3608 | ata_dev_printk(dev, KERN_ERR, "revalidation failed (errno=%d)\n", rc); |
623a3128 TH |
3609 | return rc; |
3610 | } | |
3611 | ||
6919a0a6 AC |
3612 | struct ata_blacklist_entry { |
3613 | const char *model_num; | |
3614 | const char *model_rev; | |
3615 | unsigned long horkage; | |
3616 | }; | |
3617 | ||
3618 | static const struct ata_blacklist_entry ata_device_blacklist [] = { | |
3619 | /* Devices with DMA related problems under Linux */ | |
3620 | { "WDC AC11000H", NULL, ATA_HORKAGE_NODMA }, | |
3621 | { "WDC AC22100H", NULL, ATA_HORKAGE_NODMA }, | |
3622 | { "WDC AC32500H", NULL, ATA_HORKAGE_NODMA }, | |
3623 | { "WDC AC33100H", NULL, ATA_HORKAGE_NODMA }, | |
3624 | { "WDC AC31600H", NULL, ATA_HORKAGE_NODMA }, | |
3625 | { "WDC AC32100H", "24.09P07", ATA_HORKAGE_NODMA }, | |
3626 | { "WDC AC23200L", "21.10N21", ATA_HORKAGE_NODMA }, | |
3627 | { "Compaq CRD-8241B", NULL, ATA_HORKAGE_NODMA }, | |
3628 | { "CRD-8400B", NULL, ATA_HORKAGE_NODMA }, | |
3629 | { "CRD-8480B", NULL, ATA_HORKAGE_NODMA }, | |
3630 | { "CRD-8482B", NULL, ATA_HORKAGE_NODMA }, | |
3631 | { "CRD-84", NULL, ATA_HORKAGE_NODMA }, | |
3632 | { "SanDisk SDP3B", NULL, ATA_HORKAGE_NODMA }, | |
3633 | { "SanDisk SDP3B-64", NULL, ATA_HORKAGE_NODMA }, | |
3634 | { "SANYO CD-ROM CRD", NULL, ATA_HORKAGE_NODMA }, | |
3635 | { "HITACHI CDR-8", NULL, ATA_HORKAGE_NODMA }, | |
3636 | { "HITACHI CDR-8335", NULL, ATA_HORKAGE_NODMA }, | |
3637 | { "HITACHI CDR-8435", NULL, ATA_HORKAGE_NODMA }, | |
3638 | { "Toshiba CD-ROM XM-6202B", NULL, ATA_HORKAGE_NODMA }, | |
3639 | { "TOSHIBA CD-ROM XM-1702BC", NULL, ATA_HORKAGE_NODMA }, | |
3640 | { "CD-532E-A", NULL, ATA_HORKAGE_NODMA }, | |
3641 | { "E-IDE CD-ROM CR-840",NULL, ATA_HORKAGE_NODMA }, | |
3642 | { "CD-ROM Drive/F5A", NULL, ATA_HORKAGE_NODMA }, | |
3643 | { "WPI CDD-820", NULL, ATA_HORKAGE_NODMA }, | |
3644 | { "SAMSUNG CD-ROM SC-148C", NULL, ATA_HORKAGE_NODMA }, | |
3645 | { "SAMSUNG CD-ROM SC", NULL, ATA_HORKAGE_NODMA }, | |
6919a0a6 AC |
3646 | { "ATAPI CD-ROM DRIVE 40X MAXIMUM",NULL,ATA_HORKAGE_NODMA }, |
3647 | { "_NEC DV5800A", NULL, ATA_HORKAGE_NODMA }, | |
3648 | { "SAMSUNG CD-ROM SN-124","N001", ATA_HORKAGE_NODMA }, | |
3649 | ||
18d6e9d5 | 3650 | /* Weird ATAPI devices */ |
6f23a31d AL |
3651 | { "TORiSAN DVD-ROM DRD-N216", NULL, ATA_HORKAGE_MAX_SEC_128 | |
3652 | ATA_HORKAGE_DMA_RW_ONLY }, | |
18d6e9d5 | 3653 | |
6919a0a6 AC |
3654 | /* Devices we expect to fail diagnostics */ |
3655 | ||
3656 | /* Devices where NCQ should be avoided */ | |
3657 | /* NCQ is slow */ | |
3658 | { "WDC WD740ADFD-00", NULL, ATA_HORKAGE_NONCQ }, | |
09125ea6 TH |
3659 | /* http://thread.gmane.org/gmane.linux.ide/14907 */ |
3660 | { "FUJITSU MHT2060BH", NULL, ATA_HORKAGE_NONCQ }, | |
7acfaf30 PR |
3661 | /* NCQ is broken */ |
3662 | { "Maxtor 6L250S0", "BANC1G10", ATA_HORKAGE_NONCQ }, | |
96442925 JA |
3663 | /* NCQ hard hangs device under heavier load, needs hard power cycle */ |
3664 | { "Maxtor 6B250S0", "BANC1B70", ATA_HORKAGE_NONCQ }, | |
36e337d0 RH |
3665 | /* Blacklist entries taken from Silicon Image 3124/3132 |
3666 | Windows driver .inf file - also several Linux problem reports */ | |
3667 | { "HTS541060G9SA00", "MB3OC60D", ATA_HORKAGE_NONCQ, }, | |
3668 | { "HTS541080G9SA00", "MB4OC60D", ATA_HORKAGE_NONCQ, }, | |
3669 | { "HTS541010G9SA00", "MBZOC60D", ATA_HORKAGE_NONCQ, }, | |
6919a0a6 AC |
3670 | |
3671 | /* Devices with NCQ limits */ | |
3672 | ||
3673 | /* End Marker */ | |
3674 | { } | |
1da177e4 | 3675 | }; |
2e9edbf8 | 3676 | |
6919a0a6 | 3677 | unsigned long ata_device_blacklisted(const struct ata_device *dev) |
1da177e4 | 3678 | { |
8bfa79fc TH |
3679 | unsigned char model_num[ATA_ID_PROD_LEN + 1]; |
3680 | unsigned char model_rev[ATA_ID_FW_REV_LEN + 1]; | |
6919a0a6 | 3681 | const struct ata_blacklist_entry *ad = ata_device_blacklist; |
3a778275 | 3682 | |
8bfa79fc TH |
3683 | ata_id_c_string(dev->id, model_num, ATA_ID_PROD, sizeof(model_num)); |
3684 | ata_id_c_string(dev->id, model_rev, ATA_ID_FW_REV, sizeof(model_rev)); | |
1da177e4 | 3685 | |
6919a0a6 | 3686 | while (ad->model_num) { |
8bfa79fc | 3687 | if (!strcmp(ad->model_num, model_num)) { |
6919a0a6 AC |
3688 | if (ad->model_rev == NULL) |
3689 | return ad->horkage; | |
8bfa79fc | 3690 | if (!strcmp(ad->model_rev, model_rev)) |
6919a0a6 | 3691 | return ad->horkage; |
f4b15fef | 3692 | } |
6919a0a6 | 3693 | ad++; |
f4b15fef | 3694 | } |
1da177e4 LT |
3695 | return 0; |
3696 | } | |
3697 | ||
6919a0a6 AC |
3698 | static int ata_dma_blacklisted(const struct ata_device *dev) |
3699 | { | |
3700 | /* We don't support polling DMA. | |
3701 | * DMA blacklist those ATAPI devices with CDB-intr (and use PIO) | |
3702 | * if the LLDD handles only interrupts in the HSM_ST_LAST state. | |
3703 | */ | |
3704 | if ((dev->ap->flags & ATA_FLAG_PIO_POLLING) && | |
3705 | (dev->flags & ATA_DFLAG_CDB_INTR)) | |
3706 | return 1; | |
3707 | return (ata_device_blacklisted(dev) & ATA_HORKAGE_NODMA) ? 1 : 0; | |
3708 | } | |
3709 | ||
a6d5a51c TH |
3710 | /** |
3711 | * ata_dev_xfermask - Compute supported xfermask of the given device | |
a6d5a51c TH |
3712 | * @dev: Device to compute xfermask for |
3713 | * | |
acf356b1 TH |
3714 | * Compute supported xfermask of @dev and store it in |
3715 | * dev->*_mask. This function is responsible for applying all | |
3716 | * known limits including host controller limits, device | |
3717 | * blacklist, etc... | |
a6d5a51c TH |
3718 | * |
3719 | * LOCKING: | |
3720 | * None. | |
a6d5a51c | 3721 | */ |
3373efd8 | 3722 | static void ata_dev_xfermask(struct ata_device *dev) |
1da177e4 | 3723 | { |
3373efd8 | 3724 | struct ata_port *ap = dev->ap; |
cca3974e | 3725 | struct ata_host *host = ap->host; |
a6d5a51c | 3726 | unsigned long xfer_mask; |
1da177e4 | 3727 | |
37deecb5 | 3728 | /* controller modes available */ |
565083e1 TH |
3729 | xfer_mask = ata_pack_xfermask(ap->pio_mask, |
3730 | ap->mwdma_mask, ap->udma_mask); | |
3731 | ||
8343f889 | 3732 | /* drive modes available */ |
37deecb5 TH |
3733 | xfer_mask &= ata_pack_xfermask(dev->pio_mask, |
3734 | dev->mwdma_mask, dev->udma_mask); | |
3735 | xfer_mask &= ata_id_xfermask(dev->id); | |
565083e1 | 3736 | |
b352e57d AC |
3737 | /* |
3738 | * CFA Advanced TrueIDE timings are not allowed on a shared | |
3739 | * cable | |
3740 | */ | |
3741 | if (ata_dev_pair(dev)) { | |
3742 | /* No PIO5 or PIO6 */ | |
3743 | xfer_mask &= ~(0x03 << (ATA_SHIFT_PIO + 5)); | |
3744 | /* No MWDMA3 or MWDMA 4 */ | |
3745 | xfer_mask &= ~(0x03 << (ATA_SHIFT_MWDMA + 3)); | |
3746 | } | |
3747 | ||
37deecb5 TH |
3748 | if (ata_dma_blacklisted(dev)) { |
3749 | xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA); | |
f15a1daf TH |
3750 | ata_dev_printk(dev, KERN_WARNING, |
3751 | "device is on DMA blacklist, disabling DMA\n"); | |
37deecb5 | 3752 | } |
a6d5a51c | 3753 | |
14d66ab7 PV |
3754 | if ((host->flags & ATA_HOST_SIMPLEX) && |
3755 | host->simplex_claimed && host->simplex_claimed != ap) { | |
37deecb5 TH |
3756 | xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA); |
3757 | ata_dev_printk(dev, KERN_WARNING, "simplex DMA is claimed by " | |
3758 | "other device, disabling DMA\n"); | |
5444a6f4 | 3759 | } |
565083e1 | 3760 | |
e424675f JG |
3761 | if (ap->flags & ATA_FLAG_NO_IORDY) |
3762 | xfer_mask &= ata_pio_mask_no_iordy(dev); | |
3763 | ||
5444a6f4 | 3764 | if (ap->ops->mode_filter) |
a76b62ca | 3765 | xfer_mask = ap->ops->mode_filter(dev, xfer_mask); |
5444a6f4 | 3766 | |
8343f889 RH |
3767 | /* Apply cable rule here. Don't apply it early because when |
3768 | * we handle hot plug the cable type can itself change. | |
3769 | * Check this last so that we know if the transfer rate was | |
3770 | * solely limited by the cable. | |
3771 | * Unknown or 80 wire cables reported host side are checked | |
3772 | * drive side as well. Cases where we know a 40wire cable | |
3773 | * is used safely for 80 are not checked here. | |
3774 | */ | |
3775 | if (xfer_mask & (0xF8 << ATA_SHIFT_UDMA)) | |
3776 | /* UDMA/44 or higher would be available */ | |
3777 | if((ap->cbl == ATA_CBL_PATA40) || | |
3778 | (ata_drive_40wire(dev->id) && | |
3779 | (ap->cbl == ATA_CBL_PATA_UNK || | |
3780 | ap->cbl == ATA_CBL_PATA80))) { | |
3781 | ata_dev_printk(dev, KERN_WARNING, | |
3782 | "limited to UDMA/33 due to 40-wire cable\n"); | |
3783 | xfer_mask &= ~(0xF8 << ATA_SHIFT_UDMA); | |
3784 | } | |
3785 | ||
565083e1 TH |
3786 | ata_unpack_xfermask(xfer_mask, &dev->pio_mask, |
3787 | &dev->mwdma_mask, &dev->udma_mask); | |
1da177e4 LT |
3788 | } |
3789 | ||
1da177e4 LT |
3790 | /** |
3791 | * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command | |
1da177e4 LT |
3792 | * @dev: Device to which command will be sent |
3793 | * | |
780a87f7 JG |
3794 | * Issue SET FEATURES - XFER MODE command to device @dev |
3795 | * on port @ap. | |
3796 | * | |
1da177e4 | 3797 | * LOCKING: |
0cba632b | 3798 | * PCI/etc. bus probe sem. |
83206a29 TH |
3799 | * |
3800 | * RETURNS: | |
3801 | * 0 on success, AC_ERR_* mask otherwise. | |
1da177e4 LT |
3802 | */ |
3803 | ||
3373efd8 | 3804 | static unsigned int ata_dev_set_xfermode(struct ata_device *dev) |
1da177e4 | 3805 | { |
a0123703 | 3806 | struct ata_taskfile tf; |
83206a29 | 3807 | unsigned int err_mask; |
1da177e4 LT |
3808 | |
3809 | /* set up set-features taskfile */ | |
3810 | DPRINTK("set features - xfer mode\n"); | |
3811 | ||
3373efd8 | 3812 | ata_tf_init(dev, &tf); |
a0123703 TH |
3813 | tf.command = ATA_CMD_SET_FEATURES; |
3814 | tf.feature = SETFEATURES_XFER; | |
3815 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
3816 | tf.protocol = ATA_PROT_NODATA; | |
3817 | tf.nsect = dev->xfer_mode; | |
1da177e4 | 3818 | |
3373efd8 | 3819 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0); |
1da177e4 | 3820 | |
83206a29 TH |
3821 | DPRINTK("EXIT, err_mask=%x\n", err_mask); |
3822 | return err_mask; | |
1da177e4 LT |
3823 | } |
3824 | ||
8bf62ece AL |
3825 | /** |
3826 | * ata_dev_init_params - Issue INIT DEV PARAMS command | |
8bf62ece | 3827 | * @dev: Device to which command will be sent |
e2a7f77a RD |
3828 | * @heads: Number of heads (taskfile parameter) |
3829 | * @sectors: Number of sectors (taskfile parameter) | |
8bf62ece AL |
3830 | * |
3831 | * LOCKING: | |
6aff8f1f TH |
3832 | * Kernel thread context (may sleep) |
3833 | * | |
3834 | * RETURNS: | |
3835 | * 0 on success, AC_ERR_* mask otherwise. | |
8bf62ece | 3836 | */ |
3373efd8 TH |
3837 | static unsigned int ata_dev_init_params(struct ata_device *dev, |
3838 | u16 heads, u16 sectors) | |
8bf62ece | 3839 | { |
a0123703 | 3840 | struct ata_taskfile tf; |
6aff8f1f | 3841 | unsigned int err_mask; |
8bf62ece AL |
3842 | |
3843 | /* Number of sectors per track 1-255. Number of heads 1-16 */ | |
3844 | if (sectors < 1 || sectors > 255 || heads < 1 || heads > 16) | |
00b6f5e9 | 3845 | return AC_ERR_INVALID; |
8bf62ece AL |
3846 | |
3847 | /* set up init dev params taskfile */ | |
3848 | DPRINTK("init dev params \n"); | |
3849 | ||
3373efd8 | 3850 | ata_tf_init(dev, &tf); |
a0123703 TH |
3851 | tf.command = ATA_CMD_INIT_DEV_PARAMS; |
3852 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
3853 | tf.protocol = ATA_PROT_NODATA; | |
3854 | tf.nsect = sectors; | |
3855 | tf.device |= (heads - 1) & 0x0f; /* max head = num. of heads - 1 */ | |
8bf62ece | 3856 | |
3373efd8 | 3857 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0); |
8bf62ece | 3858 | |
6aff8f1f TH |
3859 | DPRINTK("EXIT, err_mask=%x\n", err_mask); |
3860 | return err_mask; | |
8bf62ece AL |
3861 | } |
3862 | ||
1da177e4 | 3863 | /** |
0cba632b JG |
3864 | * ata_sg_clean - Unmap DMA memory associated with command |
3865 | * @qc: Command containing DMA memory to be released | |
3866 | * | |
3867 | * Unmap all mapped DMA memory associated with this command. | |
1da177e4 LT |
3868 | * |
3869 | * LOCKING: | |
cca3974e | 3870 | * spin_lock_irqsave(host lock) |
1da177e4 | 3871 | */ |
70e6ad0c | 3872 | void ata_sg_clean(struct ata_queued_cmd *qc) |
1da177e4 LT |
3873 | { |
3874 | struct ata_port *ap = qc->ap; | |
cedc9a47 | 3875 | struct scatterlist *sg = qc->__sg; |
1da177e4 | 3876 | int dir = qc->dma_dir; |
cedc9a47 | 3877 | void *pad_buf = NULL; |
1da177e4 | 3878 | |
a4631474 TH |
3879 | WARN_ON(!(qc->flags & ATA_QCFLAG_DMAMAP)); |
3880 | WARN_ON(sg == NULL); | |
1da177e4 LT |
3881 | |
3882 | if (qc->flags & ATA_QCFLAG_SINGLE) | |
f131883e | 3883 | WARN_ON(qc->n_elem > 1); |
1da177e4 | 3884 | |
2c13b7ce | 3885 | VPRINTK("unmapping %u sg elements\n", qc->n_elem); |
1da177e4 | 3886 | |
cedc9a47 JG |
3887 | /* if we padded the buffer out to 32-bit bound, and data |
3888 | * xfer direction is from-device, we must copy from the | |
3889 | * pad buffer back into the supplied buffer | |
3890 | */ | |
3891 | if (qc->pad_len && !(qc->tf.flags & ATA_TFLAG_WRITE)) | |
3892 | pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ); | |
3893 | ||
3894 | if (qc->flags & ATA_QCFLAG_SG) { | |
e1410f2d | 3895 | if (qc->n_elem) |
2f1f610b | 3896 | dma_unmap_sg(ap->dev, sg, qc->n_elem, dir); |
cedc9a47 JG |
3897 | /* restore last sg */ |
3898 | sg[qc->orig_n_elem - 1].length += qc->pad_len; | |
3899 | if (pad_buf) { | |
3900 | struct scatterlist *psg = &qc->pad_sgent; | |
3901 | void *addr = kmap_atomic(psg->page, KM_IRQ0); | |
3902 | memcpy(addr + psg->offset, pad_buf, qc->pad_len); | |
dfa15988 | 3903 | kunmap_atomic(addr, KM_IRQ0); |
cedc9a47 JG |
3904 | } |
3905 | } else { | |
2e242fa9 | 3906 | if (qc->n_elem) |
2f1f610b | 3907 | dma_unmap_single(ap->dev, |
e1410f2d JG |
3908 | sg_dma_address(&sg[0]), sg_dma_len(&sg[0]), |
3909 | dir); | |
cedc9a47 JG |
3910 | /* restore sg */ |
3911 | sg->length += qc->pad_len; | |
3912 | if (pad_buf) | |
3913 | memcpy(qc->buf_virt + sg->length - qc->pad_len, | |
3914 | pad_buf, qc->pad_len); | |
3915 | } | |
1da177e4 LT |
3916 | |
3917 | qc->flags &= ~ATA_QCFLAG_DMAMAP; | |
cedc9a47 | 3918 | qc->__sg = NULL; |
1da177e4 LT |
3919 | } |
3920 | ||
3921 | /** | |
3922 | * ata_fill_sg - Fill PCI IDE PRD table | |
3923 | * @qc: Metadata associated with taskfile to be transferred | |
3924 | * | |
780a87f7 JG |
3925 | * Fill PCI IDE PRD (scatter-gather) table with segments |
3926 | * associated with the current disk command. | |
3927 | * | |
1da177e4 | 3928 | * LOCKING: |
cca3974e | 3929 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
3930 | * |
3931 | */ | |
3932 | static void ata_fill_sg(struct ata_queued_cmd *qc) | |
3933 | { | |
1da177e4 | 3934 | struct ata_port *ap = qc->ap; |
cedc9a47 JG |
3935 | struct scatterlist *sg; |
3936 | unsigned int idx; | |
1da177e4 | 3937 | |
a4631474 | 3938 | WARN_ON(qc->__sg == NULL); |
f131883e | 3939 | WARN_ON(qc->n_elem == 0 && qc->pad_len == 0); |
1da177e4 LT |
3940 | |
3941 | idx = 0; | |
cedc9a47 | 3942 | ata_for_each_sg(sg, qc) { |
1da177e4 LT |
3943 | u32 addr, offset; |
3944 | u32 sg_len, len; | |
3945 | ||
3946 | /* determine if physical DMA addr spans 64K boundary. | |
3947 | * Note h/w doesn't support 64-bit, so we unconditionally | |
3948 | * truncate dma_addr_t to u32. | |
3949 | */ | |
3950 | addr = (u32) sg_dma_address(sg); | |
3951 | sg_len = sg_dma_len(sg); | |
3952 | ||
3953 | while (sg_len) { | |
3954 | offset = addr & 0xffff; | |
3955 | len = sg_len; | |
3956 | if ((offset + sg_len) > 0x10000) | |
3957 | len = 0x10000 - offset; | |
3958 | ||
3959 | ap->prd[idx].addr = cpu_to_le32(addr); | |
3960 | ap->prd[idx].flags_len = cpu_to_le32(len & 0xffff); | |
3961 | VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", idx, addr, len); | |
3962 | ||
3963 | idx++; | |
3964 | sg_len -= len; | |
3965 | addr += len; | |
3966 | } | |
3967 | } | |
3968 | ||
3969 | if (idx) | |
3970 | ap->prd[idx - 1].flags_len |= cpu_to_le32(ATA_PRD_EOT); | |
3971 | } | |
3972 | /** | |
3973 | * ata_check_atapi_dma - Check whether ATAPI DMA can be supported | |
3974 | * @qc: Metadata associated with taskfile to check | |
3975 | * | |
780a87f7 JG |
3976 | * Allow low-level driver to filter ATA PACKET commands, returning |
3977 | * a status indicating whether or not it is OK to use DMA for the | |
3978 | * supplied PACKET command. | |
3979 | * | |
1da177e4 | 3980 | * LOCKING: |
cca3974e | 3981 | * spin_lock_irqsave(host lock) |
0cba632b | 3982 | * |
1da177e4 LT |
3983 | * RETURNS: 0 when ATAPI DMA can be used |
3984 | * nonzero otherwise | |
3985 | */ | |
3986 | int ata_check_atapi_dma(struct ata_queued_cmd *qc) | |
3987 | { | |
3988 | struct ata_port *ap = qc->ap; | |
3989 | int rc = 0; /* Assume ATAPI DMA is OK by default */ | |
3990 | ||
6f23a31d AL |
3991 | /* some drives can only do ATAPI DMA on read/write */ |
3992 | if (unlikely(qc->dev->horkage & ATA_HORKAGE_DMA_RW_ONLY)) { | |
3993 | struct scsi_cmnd *cmd = qc->scsicmd; | |
3994 | u8 *scsicmd = cmd->cmnd; | |
3995 | ||
3996 | switch (scsicmd[0]) { | |
3997 | case READ_10: | |
3998 | case WRITE_10: | |
3999 | case READ_12: | |
4000 | case WRITE_12: | |
4001 | case READ_6: | |
4002 | case WRITE_6: | |
4003 | /* atapi dma maybe ok */ | |
4004 | break; | |
4005 | default: | |
4006 | /* turn off atapi dma */ | |
4007 | return 1; | |
4008 | } | |
4009 | } | |
4010 | ||
1da177e4 LT |
4011 | if (ap->ops->check_atapi_dma) |
4012 | rc = ap->ops->check_atapi_dma(qc); | |
4013 | ||
4014 | return rc; | |
4015 | } | |
4016 | /** | |
4017 | * ata_qc_prep - Prepare taskfile for submission | |
4018 | * @qc: Metadata associated with taskfile to be prepared | |
4019 | * | |
780a87f7 JG |
4020 | * Prepare ATA taskfile for submission. |
4021 | * | |
1da177e4 | 4022 | * LOCKING: |
cca3974e | 4023 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
4024 | */ |
4025 | void ata_qc_prep(struct ata_queued_cmd *qc) | |
4026 | { | |
4027 | if (!(qc->flags & ATA_QCFLAG_DMAMAP)) | |
4028 | return; | |
4029 | ||
4030 | ata_fill_sg(qc); | |
4031 | } | |
4032 | ||
e46834cd BK |
4033 | void ata_noop_qc_prep(struct ata_queued_cmd *qc) { } |
4034 | ||
0cba632b JG |
4035 | /** |
4036 | * ata_sg_init_one - Associate command with memory buffer | |
4037 | * @qc: Command to be associated | |
4038 | * @buf: Memory buffer | |
4039 | * @buflen: Length of memory buffer, in bytes. | |
4040 | * | |
4041 | * Initialize the data-related elements of queued_cmd @qc | |
4042 | * to point to a single memory buffer, @buf of byte length @buflen. | |
4043 | * | |
4044 | * LOCKING: | |
cca3974e | 4045 | * spin_lock_irqsave(host lock) |
0cba632b JG |
4046 | */ |
4047 | ||
1da177e4 LT |
4048 | void ata_sg_init_one(struct ata_queued_cmd *qc, void *buf, unsigned int buflen) |
4049 | { | |
1da177e4 LT |
4050 | qc->flags |= ATA_QCFLAG_SINGLE; |
4051 | ||
cedc9a47 | 4052 | qc->__sg = &qc->sgent; |
1da177e4 | 4053 | qc->n_elem = 1; |
cedc9a47 | 4054 | qc->orig_n_elem = 1; |
1da177e4 | 4055 | qc->buf_virt = buf; |
233277ca | 4056 | qc->nbytes = buflen; |
1da177e4 | 4057 | |
61c0596c | 4058 | sg_init_one(&qc->sgent, buf, buflen); |
1da177e4 LT |
4059 | } |
4060 | ||
0cba632b JG |
4061 | /** |
4062 | * ata_sg_init - Associate command with scatter-gather table. | |
4063 | * @qc: Command to be associated | |
4064 | * @sg: Scatter-gather table. | |
4065 | * @n_elem: Number of elements in s/g table. | |
4066 | * | |
4067 | * Initialize the data-related elements of queued_cmd @qc | |
4068 | * to point to a scatter-gather table @sg, containing @n_elem | |
4069 | * elements. | |
4070 | * | |
4071 | * LOCKING: | |
cca3974e | 4072 | * spin_lock_irqsave(host lock) |
0cba632b JG |
4073 | */ |
4074 | ||
1da177e4 LT |
4075 | void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg, |
4076 | unsigned int n_elem) | |
4077 | { | |
4078 | qc->flags |= ATA_QCFLAG_SG; | |
cedc9a47 | 4079 | qc->__sg = sg; |
1da177e4 | 4080 | qc->n_elem = n_elem; |
cedc9a47 | 4081 | qc->orig_n_elem = n_elem; |
1da177e4 LT |
4082 | } |
4083 | ||
4084 | /** | |
0cba632b JG |
4085 | * ata_sg_setup_one - DMA-map the memory buffer associated with a command. |
4086 | * @qc: Command with memory buffer to be mapped. | |
4087 | * | |
4088 | * DMA-map the memory buffer associated with queued_cmd @qc. | |
1da177e4 LT |
4089 | * |
4090 | * LOCKING: | |
cca3974e | 4091 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
4092 | * |
4093 | * RETURNS: | |
0cba632b | 4094 | * Zero on success, negative on error. |
1da177e4 LT |
4095 | */ |
4096 | ||
4097 | static int ata_sg_setup_one(struct ata_queued_cmd *qc) | |
4098 | { | |
4099 | struct ata_port *ap = qc->ap; | |
4100 | int dir = qc->dma_dir; | |
cedc9a47 | 4101 | struct scatterlist *sg = qc->__sg; |
1da177e4 | 4102 | dma_addr_t dma_address; |
2e242fa9 | 4103 | int trim_sg = 0; |
1da177e4 | 4104 | |
cedc9a47 JG |
4105 | /* we must lengthen transfers to end on a 32-bit boundary */ |
4106 | qc->pad_len = sg->length & 3; | |
4107 | if (qc->pad_len) { | |
4108 | void *pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ); | |
4109 | struct scatterlist *psg = &qc->pad_sgent; | |
4110 | ||
a4631474 | 4111 | WARN_ON(qc->dev->class != ATA_DEV_ATAPI); |
cedc9a47 JG |
4112 | |
4113 | memset(pad_buf, 0, ATA_DMA_PAD_SZ); | |
4114 | ||
4115 | if (qc->tf.flags & ATA_TFLAG_WRITE) | |
4116 | memcpy(pad_buf, qc->buf_virt + sg->length - qc->pad_len, | |
4117 | qc->pad_len); | |
4118 | ||
4119 | sg_dma_address(psg) = ap->pad_dma + (qc->tag * ATA_DMA_PAD_SZ); | |
4120 | sg_dma_len(psg) = ATA_DMA_PAD_SZ; | |
4121 | /* trim sg */ | |
4122 | sg->length -= qc->pad_len; | |
2e242fa9 TH |
4123 | if (sg->length == 0) |
4124 | trim_sg = 1; | |
cedc9a47 JG |
4125 | |
4126 | DPRINTK("padding done, sg->length=%u pad_len=%u\n", | |
4127 | sg->length, qc->pad_len); | |
4128 | } | |
4129 | ||
2e242fa9 TH |
4130 | if (trim_sg) { |
4131 | qc->n_elem--; | |
e1410f2d JG |
4132 | goto skip_map; |
4133 | } | |
4134 | ||
2f1f610b | 4135 | dma_address = dma_map_single(ap->dev, qc->buf_virt, |
32529e01 | 4136 | sg->length, dir); |
537a95d9 TH |
4137 | if (dma_mapping_error(dma_address)) { |
4138 | /* restore sg */ | |
4139 | sg->length += qc->pad_len; | |
1da177e4 | 4140 | return -1; |
537a95d9 | 4141 | } |
1da177e4 LT |
4142 | |
4143 | sg_dma_address(sg) = dma_address; | |
32529e01 | 4144 | sg_dma_len(sg) = sg->length; |
1da177e4 | 4145 | |
2e242fa9 | 4146 | skip_map: |
1da177e4 LT |
4147 | DPRINTK("mapped buffer of %d bytes for %s\n", sg_dma_len(sg), |
4148 | qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read"); | |
4149 | ||
4150 | return 0; | |
4151 | } | |
4152 | ||
4153 | /** | |
0cba632b JG |
4154 | * ata_sg_setup - DMA-map the scatter-gather table associated with a command. |
4155 | * @qc: Command with scatter-gather table to be mapped. | |
4156 | * | |
4157 | * DMA-map the scatter-gather table associated with queued_cmd @qc. | |
1da177e4 LT |
4158 | * |
4159 | * LOCKING: | |
cca3974e | 4160 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
4161 | * |
4162 | * RETURNS: | |
0cba632b | 4163 | * Zero on success, negative on error. |
1da177e4 LT |
4164 | * |
4165 | */ | |
4166 | ||
4167 | static int ata_sg_setup(struct ata_queued_cmd *qc) | |
4168 | { | |
4169 | struct ata_port *ap = qc->ap; | |
cedc9a47 JG |
4170 | struct scatterlist *sg = qc->__sg; |
4171 | struct scatterlist *lsg = &sg[qc->n_elem - 1]; | |
e1410f2d | 4172 | int n_elem, pre_n_elem, dir, trim_sg = 0; |
1da177e4 | 4173 | |
44877b4e | 4174 | VPRINTK("ENTER, ata%u\n", ap->print_id); |
a4631474 | 4175 | WARN_ON(!(qc->flags & ATA_QCFLAG_SG)); |
1da177e4 | 4176 | |
cedc9a47 JG |
4177 | /* we must lengthen transfers to end on a 32-bit boundary */ |
4178 | qc->pad_len = lsg->length & 3; | |
4179 | if (qc->pad_len) { | |
4180 | void *pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ); | |
4181 | struct scatterlist *psg = &qc->pad_sgent; | |
4182 | unsigned int offset; | |
4183 | ||
a4631474 | 4184 | WARN_ON(qc->dev->class != ATA_DEV_ATAPI); |
cedc9a47 JG |
4185 | |
4186 | memset(pad_buf, 0, ATA_DMA_PAD_SZ); | |
4187 | ||
4188 | /* | |
4189 | * psg->page/offset are used to copy to-be-written | |
4190 | * data in this function or read data in ata_sg_clean. | |
4191 | */ | |
4192 | offset = lsg->offset + lsg->length - qc->pad_len; | |
4193 | psg->page = nth_page(lsg->page, offset >> PAGE_SHIFT); | |
4194 | psg->offset = offset_in_page(offset); | |
4195 | ||
4196 | if (qc->tf.flags & ATA_TFLAG_WRITE) { | |
4197 | void *addr = kmap_atomic(psg->page, KM_IRQ0); | |
4198 | memcpy(pad_buf, addr + psg->offset, qc->pad_len); | |
dfa15988 | 4199 | kunmap_atomic(addr, KM_IRQ0); |
cedc9a47 JG |
4200 | } |
4201 | ||
4202 | sg_dma_address(psg) = ap->pad_dma + (qc->tag * ATA_DMA_PAD_SZ); | |
4203 | sg_dma_len(psg) = ATA_DMA_PAD_SZ; | |
4204 | /* trim last sg */ | |
4205 | lsg->length -= qc->pad_len; | |
e1410f2d JG |
4206 | if (lsg->length == 0) |
4207 | trim_sg = 1; | |
cedc9a47 JG |
4208 | |
4209 | DPRINTK("padding done, sg[%d].length=%u pad_len=%u\n", | |
4210 | qc->n_elem - 1, lsg->length, qc->pad_len); | |
4211 | } | |
4212 | ||
e1410f2d JG |
4213 | pre_n_elem = qc->n_elem; |
4214 | if (trim_sg && pre_n_elem) | |
4215 | pre_n_elem--; | |
4216 | ||
4217 | if (!pre_n_elem) { | |
4218 | n_elem = 0; | |
4219 | goto skip_map; | |
4220 | } | |
4221 | ||
1da177e4 | 4222 | dir = qc->dma_dir; |
2f1f610b | 4223 | n_elem = dma_map_sg(ap->dev, sg, pre_n_elem, dir); |
537a95d9 TH |
4224 | if (n_elem < 1) { |
4225 | /* restore last sg */ | |
4226 | lsg->length += qc->pad_len; | |
1da177e4 | 4227 | return -1; |
537a95d9 | 4228 | } |
1da177e4 LT |
4229 | |
4230 | DPRINTK("%d sg elements mapped\n", n_elem); | |
4231 | ||
e1410f2d | 4232 | skip_map: |
1da177e4 LT |
4233 | qc->n_elem = n_elem; |
4234 | ||
4235 | return 0; | |
4236 | } | |
4237 | ||
0baab86b | 4238 | /** |
c893a3ae | 4239 | * swap_buf_le16 - swap halves of 16-bit words in place |
0baab86b EF |
4240 | * @buf: Buffer to swap |
4241 | * @buf_words: Number of 16-bit words in buffer. | |
4242 | * | |
4243 | * Swap halves of 16-bit words if needed to convert from | |
4244 | * little-endian byte order to native cpu byte order, or | |
4245 | * vice-versa. | |
4246 | * | |
4247 | * LOCKING: | |
6f0ef4fa | 4248 | * Inherited from caller. |
0baab86b | 4249 | */ |
1da177e4 LT |
4250 | void swap_buf_le16(u16 *buf, unsigned int buf_words) |
4251 | { | |
4252 | #ifdef __BIG_ENDIAN | |
4253 | unsigned int i; | |
4254 | ||
4255 | for (i = 0; i < buf_words; i++) | |
4256 | buf[i] = le16_to_cpu(buf[i]); | |
4257 | #endif /* __BIG_ENDIAN */ | |
4258 | } | |
4259 | ||
6ae4cfb5 | 4260 | /** |
0d5ff566 | 4261 | * ata_data_xfer - Transfer data by PIO |
a6b2c5d4 | 4262 | * @adev: device to target |
6ae4cfb5 AL |
4263 | * @buf: data buffer |
4264 | * @buflen: buffer length | |
344babaa | 4265 | * @write_data: read/write |
6ae4cfb5 AL |
4266 | * |
4267 | * Transfer data from/to the device data register by PIO. | |
4268 | * | |
4269 | * LOCKING: | |
4270 | * Inherited from caller. | |
6ae4cfb5 | 4271 | */ |
0d5ff566 TH |
4272 | void ata_data_xfer(struct ata_device *adev, unsigned char *buf, |
4273 | unsigned int buflen, int write_data) | |
1da177e4 | 4274 | { |
a6b2c5d4 | 4275 | struct ata_port *ap = adev->ap; |
6ae4cfb5 | 4276 | unsigned int words = buflen >> 1; |
1da177e4 | 4277 | |
6ae4cfb5 | 4278 | /* Transfer multiple of 2 bytes */ |
1da177e4 | 4279 | if (write_data) |
0d5ff566 | 4280 | iowrite16_rep(ap->ioaddr.data_addr, buf, words); |
1da177e4 | 4281 | else |
0d5ff566 | 4282 | ioread16_rep(ap->ioaddr.data_addr, buf, words); |
6ae4cfb5 AL |
4283 | |
4284 | /* Transfer trailing 1 byte, if any. */ | |
4285 | if (unlikely(buflen & 0x01)) { | |
4286 | u16 align_buf[1] = { 0 }; | |
4287 | unsigned char *trailing_buf = buf + buflen - 1; | |
4288 | ||
4289 | if (write_data) { | |
4290 | memcpy(align_buf, trailing_buf, 1); | |
0d5ff566 | 4291 | iowrite16(le16_to_cpu(align_buf[0]), ap->ioaddr.data_addr); |
6ae4cfb5 | 4292 | } else { |
0d5ff566 | 4293 | align_buf[0] = cpu_to_le16(ioread16(ap->ioaddr.data_addr)); |
6ae4cfb5 AL |
4294 | memcpy(trailing_buf, align_buf, 1); |
4295 | } | |
4296 | } | |
1da177e4 LT |
4297 | } |
4298 | ||
75e99585 | 4299 | /** |
0d5ff566 | 4300 | * ata_data_xfer_noirq - Transfer data by PIO |
75e99585 AC |
4301 | * @adev: device to target |
4302 | * @buf: data buffer | |
4303 | * @buflen: buffer length | |
4304 | * @write_data: read/write | |
4305 | * | |
88574551 | 4306 | * Transfer data from/to the device data register by PIO. Do the |
75e99585 AC |
4307 | * transfer with interrupts disabled. |
4308 | * | |
4309 | * LOCKING: | |
4310 | * Inherited from caller. | |
4311 | */ | |
0d5ff566 TH |
4312 | void ata_data_xfer_noirq(struct ata_device *adev, unsigned char *buf, |
4313 | unsigned int buflen, int write_data) | |
75e99585 AC |
4314 | { |
4315 | unsigned long flags; | |
4316 | local_irq_save(flags); | |
0d5ff566 | 4317 | ata_data_xfer(adev, buf, buflen, write_data); |
75e99585 AC |
4318 | local_irq_restore(flags); |
4319 | } | |
4320 | ||
4321 | ||
6ae4cfb5 | 4322 | /** |
5a5dbd18 | 4323 | * ata_pio_sector - Transfer a sector of data. |
6ae4cfb5 AL |
4324 | * @qc: Command on going |
4325 | * | |
5a5dbd18 | 4326 | * Transfer qc->sect_size bytes of data from/to the ATA device. |
6ae4cfb5 AL |
4327 | * |
4328 | * LOCKING: | |
4329 | * Inherited from caller. | |
4330 | */ | |
4331 | ||
1da177e4 LT |
4332 | static void ata_pio_sector(struct ata_queued_cmd *qc) |
4333 | { | |
4334 | int do_write = (qc->tf.flags & ATA_TFLAG_WRITE); | |
cedc9a47 | 4335 | struct scatterlist *sg = qc->__sg; |
1da177e4 LT |
4336 | struct ata_port *ap = qc->ap; |
4337 | struct page *page; | |
4338 | unsigned int offset; | |
4339 | unsigned char *buf; | |
4340 | ||
5a5dbd18 | 4341 | if (qc->curbytes == qc->nbytes - qc->sect_size) |
14be71f4 | 4342 | ap->hsm_task_state = HSM_ST_LAST; |
1da177e4 LT |
4343 | |
4344 | page = sg[qc->cursg].page; | |
726f0785 | 4345 | offset = sg[qc->cursg].offset + qc->cursg_ofs; |
1da177e4 LT |
4346 | |
4347 | /* get the current page and offset */ | |
4348 | page = nth_page(page, (offset >> PAGE_SHIFT)); | |
4349 | offset %= PAGE_SIZE; | |
4350 | ||
1da177e4 LT |
4351 | DPRINTK("data %s\n", qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read"); |
4352 | ||
91b8b313 AL |
4353 | if (PageHighMem(page)) { |
4354 | unsigned long flags; | |
4355 | ||
a6b2c5d4 | 4356 | /* FIXME: use a bounce buffer */ |
91b8b313 AL |
4357 | local_irq_save(flags); |
4358 | buf = kmap_atomic(page, KM_IRQ0); | |
083958d3 | 4359 | |
91b8b313 | 4360 | /* do the actual data transfer */ |
5a5dbd18 | 4361 | ap->ops->data_xfer(qc->dev, buf + offset, qc->sect_size, do_write); |
1da177e4 | 4362 | |
91b8b313 AL |
4363 | kunmap_atomic(buf, KM_IRQ0); |
4364 | local_irq_restore(flags); | |
4365 | } else { | |
4366 | buf = page_address(page); | |
5a5dbd18 | 4367 | ap->ops->data_xfer(qc->dev, buf + offset, qc->sect_size, do_write); |
91b8b313 | 4368 | } |
1da177e4 | 4369 | |
5a5dbd18 ML |
4370 | qc->curbytes += qc->sect_size; |
4371 | qc->cursg_ofs += qc->sect_size; | |
1da177e4 | 4372 | |
726f0785 | 4373 | if (qc->cursg_ofs == (&sg[qc->cursg])->length) { |
1da177e4 LT |
4374 | qc->cursg++; |
4375 | qc->cursg_ofs = 0; | |
4376 | } | |
1da177e4 | 4377 | } |
1da177e4 | 4378 | |
07f6f7d0 | 4379 | /** |
5a5dbd18 | 4380 | * ata_pio_sectors - Transfer one or many sectors. |
07f6f7d0 AL |
4381 | * @qc: Command on going |
4382 | * | |
5a5dbd18 | 4383 | * Transfer one or many sectors of data from/to the |
07f6f7d0 AL |
4384 | * ATA device for the DRQ request. |
4385 | * | |
4386 | * LOCKING: | |
4387 | * Inherited from caller. | |
4388 | */ | |
1da177e4 | 4389 | |
07f6f7d0 AL |
4390 | static void ata_pio_sectors(struct ata_queued_cmd *qc) |
4391 | { | |
4392 | if (is_multi_taskfile(&qc->tf)) { | |
4393 | /* READ/WRITE MULTIPLE */ | |
4394 | unsigned int nsect; | |
4395 | ||
587005de | 4396 | WARN_ON(qc->dev->multi_count == 0); |
1da177e4 | 4397 | |
5a5dbd18 | 4398 | nsect = min((qc->nbytes - qc->curbytes) / qc->sect_size, |
726f0785 | 4399 | qc->dev->multi_count); |
07f6f7d0 AL |
4400 | while (nsect--) |
4401 | ata_pio_sector(qc); | |
4402 | } else | |
4403 | ata_pio_sector(qc); | |
4404 | } | |
4405 | ||
c71c1857 AL |
4406 | /** |
4407 | * atapi_send_cdb - Write CDB bytes to hardware | |
4408 | * @ap: Port to which ATAPI device is attached. | |
4409 | * @qc: Taskfile currently active | |
4410 | * | |
4411 | * When device has indicated its readiness to accept | |
4412 | * a CDB, this function is called. Send the CDB. | |
4413 | * | |
4414 | * LOCKING: | |
4415 | * caller. | |
4416 | */ | |
4417 | ||
4418 | static void atapi_send_cdb(struct ata_port *ap, struct ata_queued_cmd *qc) | |
4419 | { | |
4420 | /* send SCSI cdb */ | |
4421 | DPRINTK("send cdb\n"); | |
db024d53 | 4422 | WARN_ON(qc->dev->cdb_len < 12); |
c71c1857 | 4423 | |
a6b2c5d4 | 4424 | ap->ops->data_xfer(qc->dev, qc->cdb, qc->dev->cdb_len, 1); |
c71c1857 AL |
4425 | ata_altstatus(ap); /* flush */ |
4426 | ||
4427 | switch (qc->tf.protocol) { | |
4428 | case ATA_PROT_ATAPI: | |
4429 | ap->hsm_task_state = HSM_ST; | |
4430 | break; | |
4431 | case ATA_PROT_ATAPI_NODATA: | |
4432 | ap->hsm_task_state = HSM_ST_LAST; | |
4433 | break; | |
4434 | case ATA_PROT_ATAPI_DMA: | |
4435 | ap->hsm_task_state = HSM_ST_LAST; | |
4436 | /* initiate bmdma */ | |
4437 | ap->ops->bmdma_start(qc); | |
4438 | break; | |
4439 | } | |
1da177e4 LT |
4440 | } |
4441 | ||
6ae4cfb5 AL |
4442 | /** |
4443 | * __atapi_pio_bytes - Transfer data from/to the ATAPI device. | |
4444 | * @qc: Command on going | |
4445 | * @bytes: number of bytes | |
4446 | * | |
4447 | * Transfer Transfer data from/to the ATAPI device. | |
4448 | * | |
4449 | * LOCKING: | |
4450 | * Inherited from caller. | |
4451 | * | |
4452 | */ | |
4453 | ||
1da177e4 LT |
4454 | static void __atapi_pio_bytes(struct ata_queued_cmd *qc, unsigned int bytes) |
4455 | { | |
4456 | int do_write = (qc->tf.flags & ATA_TFLAG_WRITE); | |
cedc9a47 | 4457 | struct scatterlist *sg = qc->__sg; |
1da177e4 LT |
4458 | struct ata_port *ap = qc->ap; |
4459 | struct page *page; | |
4460 | unsigned char *buf; | |
4461 | unsigned int offset, count; | |
4462 | ||
563a6e1f | 4463 | if (qc->curbytes + bytes >= qc->nbytes) |
14be71f4 | 4464 | ap->hsm_task_state = HSM_ST_LAST; |
1da177e4 LT |
4465 | |
4466 | next_sg: | |
563a6e1f | 4467 | if (unlikely(qc->cursg >= qc->n_elem)) { |
7fb6ec28 | 4468 | /* |
563a6e1f AL |
4469 | * The end of qc->sg is reached and the device expects |
4470 | * more data to transfer. In order not to overrun qc->sg | |
4471 | * and fulfill length specified in the byte count register, | |
4472 | * - for read case, discard trailing data from the device | |
4473 | * - for write case, padding zero data to the device | |
4474 | */ | |
4475 | u16 pad_buf[1] = { 0 }; | |
4476 | unsigned int words = bytes >> 1; | |
4477 | unsigned int i; | |
4478 | ||
4479 | if (words) /* warning if bytes > 1 */ | |
f15a1daf TH |
4480 | ata_dev_printk(qc->dev, KERN_WARNING, |
4481 | "%u bytes trailing data\n", bytes); | |
563a6e1f AL |
4482 | |
4483 | for (i = 0; i < words; i++) | |
a6b2c5d4 | 4484 | ap->ops->data_xfer(qc->dev, (unsigned char*)pad_buf, 2, do_write); |
563a6e1f | 4485 | |
14be71f4 | 4486 | ap->hsm_task_state = HSM_ST_LAST; |
563a6e1f AL |
4487 | return; |
4488 | } | |
4489 | ||
cedc9a47 | 4490 | sg = &qc->__sg[qc->cursg]; |
1da177e4 | 4491 | |
1da177e4 LT |
4492 | page = sg->page; |
4493 | offset = sg->offset + qc->cursg_ofs; | |
4494 | ||
4495 | /* get the current page and offset */ | |
4496 | page = nth_page(page, (offset >> PAGE_SHIFT)); | |
4497 | offset %= PAGE_SIZE; | |
4498 | ||
6952df03 | 4499 | /* don't overrun current sg */ |
32529e01 | 4500 | count = min(sg->length - qc->cursg_ofs, bytes); |
1da177e4 LT |
4501 | |
4502 | /* don't cross page boundaries */ | |
4503 | count = min(count, (unsigned int)PAGE_SIZE - offset); | |
4504 | ||
7282aa4b AL |
4505 | DPRINTK("data %s\n", qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read"); |
4506 | ||
91b8b313 AL |
4507 | if (PageHighMem(page)) { |
4508 | unsigned long flags; | |
4509 | ||
a6b2c5d4 | 4510 | /* FIXME: use bounce buffer */ |
91b8b313 AL |
4511 | local_irq_save(flags); |
4512 | buf = kmap_atomic(page, KM_IRQ0); | |
083958d3 | 4513 | |
91b8b313 | 4514 | /* do the actual data transfer */ |
a6b2c5d4 | 4515 | ap->ops->data_xfer(qc->dev, buf + offset, count, do_write); |
7282aa4b | 4516 | |
91b8b313 AL |
4517 | kunmap_atomic(buf, KM_IRQ0); |
4518 | local_irq_restore(flags); | |
4519 | } else { | |
4520 | buf = page_address(page); | |
a6b2c5d4 | 4521 | ap->ops->data_xfer(qc->dev, buf + offset, count, do_write); |
91b8b313 | 4522 | } |
1da177e4 LT |
4523 | |
4524 | bytes -= count; | |
4525 | qc->curbytes += count; | |
4526 | qc->cursg_ofs += count; | |
4527 | ||
32529e01 | 4528 | if (qc->cursg_ofs == sg->length) { |
1da177e4 LT |
4529 | qc->cursg++; |
4530 | qc->cursg_ofs = 0; | |
4531 | } | |
4532 | ||
563a6e1f | 4533 | if (bytes) |
1da177e4 | 4534 | goto next_sg; |
1da177e4 LT |
4535 | } |
4536 | ||
6ae4cfb5 AL |
4537 | /** |
4538 | * atapi_pio_bytes - Transfer data from/to the ATAPI device. | |
4539 | * @qc: Command on going | |
4540 | * | |
4541 | * Transfer Transfer data from/to the ATAPI device. | |
4542 | * | |
4543 | * LOCKING: | |
4544 | * Inherited from caller. | |
6ae4cfb5 AL |
4545 | */ |
4546 | ||
1da177e4 LT |
4547 | static void atapi_pio_bytes(struct ata_queued_cmd *qc) |
4548 | { | |
4549 | struct ata_port *ap = qc->ap; | |
4550 | struct ata_device *dev = qc->dev; | |
4551 | unsigned int ireason, bc_lo, bc_hi, bytes; | |
4552 | int i_write, do_write = (qc->tf.flags & ATA_TFLAG_WRITE) ? 1 : 0; | |
4553 | ||
eec4c3f3 AL |
4554 | /* Abuse qc->result_tf for temp storage of intermediate TF |
4555 | * here to save some kernel stack usage. | |
4556 | * For normal completion, qc->result_tf is not relevant. For | |
4557 | * error, qc->result_tf is later overwritten by ata_qc_complete(). | |
4558 | * So, the correctness of qc->result_tf is not affected. | |
4559 | */ | |
4560 | ap->ops->tf_read(ap, &qc->result_tf); | |
4561 | ireason = qc->result_tf.nsect; | |
4562 | bc_lo = qc->result_tf.lbam; | |
4563 | bc_hi = qc->result_tf.lbah; | |
1da177e4 LT |
4564 | bytes = (bc_hi << 8) | bc_lo; |
4565 | ||
4566 | /* shall be cleared to zero, indicating xfer of data */ | |
4567 | if (ireason & (1 << 0)) | |
4568 | goto err_out; | |
4569 | ||
4570 | /* make sure transfer direction matches expected */ | |
4571 | i_write = ((ireason & (1 << 1)) == 0) ? 1 : 0; | |
4572 | if (do_write != i_write) | |
4573 | goto err_out; | |
4574 | ||
44877b4e | 4575 | VPRINTK("ata%u: xfering %d bytes\n", ap->print_id, bytes); |
312f7da2 | 4576 | |
1da177e4 LT |
4577 | __atapi_pio_bytes(qc, bytes); |
4578 | ||
4579 | return; | |
4580 | ||
4581 | err_out: | |
f15a1daf | 4582 | ata_dev_printk(dev, KERN_INFO, "ATAPI check failed\n"); |
11a56d24 | 4583 | qc->err_mask |= AC_ERR_HSM; |
14be71f4 | 4584 | ap->hsm_task_state = HSM_ST_ERR; |
1da177e4 LT |
4585 | } |
4586 | ||
4587 | /** | |
c234fb00 AL |
4588 | * ata_hsm_ok_in_wq - Check if the qc can be handled in the workqueue. |
4589 | * @ap: the target ata_port | |
4590 | * @qc: qc on going | |
1da177e4 | 4591 | * |
c234fb00 AL |
4592 | * RETURNS: |
4593 | * 1 if ok in workqueue, 0 otherwise. | |
1da177e4 | 4594 | */ |
c234fb00 AL |
4595 | |
4596 | static inline int ata_hsm_ok_in_wq(struct ata_port *ap, struct ata_queued_cmd *qc) | |
1da177e4 | 4597 | { |
c234fb00 AL |
4598 | if (qc->tf.flags & ATA_TFLAG_POLLING) |
4599 | return 1; | |
1da177e4 | 4600 | |
c234fb00 AL |
4601 | if (ap->hsm_task_state == HSM_ST_FIRST) { |
4602 | if (qc->tf.protocol == ATA_PROT_PIO && | |
4603 | (qc->tf.flags & ATA_TFLAG_WRITE)) | |
4604 | return 1; | |
1da177e4 | 4605 | |
c234fb00 AL |
4606 | if (is_atapi_taskfile(&qc->tf) && |
4607 | !(qc->dev->flags & ATA_DFLAG_CDB_INTR)) | |
4608 | return 1; | |
fe79e683 AL |
4609 | } |
4610 | ||
c234fb00 AL |
4611 | return 0; |
4612 | } | |
1da177e4 | 4613 | |
c17ea20d TH |
4614 | /** |
4615 | * ata_hsm_qc_complete - finish a qc running on standard HSM | |
4616 | * @qc: Command to complete | |
4617 | * @in_wq: 1 if called from workqueue, 0 otherwise | |
4618 | * | |
4619 | * Finish @qc which is running on standard HSM. | |
4620 | * | |
4621 | * LOCKING: | |
cca3974e | 4622 | * If @in_wq is zero, spin_lock_irqsave(host lock). |
c17ea20d TH |
4623 | * Otherwise, none on entry and grabs host lock. |
4624 | */ | |
4625 | static void ata_hsm_qc_complete(struct ata_queued_cmd *qc, int in_wq) | |
4626 | { | |
4627 | struct ata_port *ap = qc->ap; | |
4628 | unsigned long flags; | |
4629 | ||
4630 | if (ap->ops->error_handler) { | |
4631 | if (in_wq) { | |
ba6a1308 | 4632 | spin_lock_irqsave(ap->lock, flags); |
c17ea20d | 4633 | |
cca3974e JG |
4634 | /* EH might have kicked in while host lock is |
4635 | * released. | |
c17ea20d TH |
4636 | */ |
4637 | qc = ata_qc_from_tag(ap, qc->tag); | |
4638 | if (qc) { | |
4639 | if (likely(!(qc->err_mask & AC_ERR_HSM))) { | |
83625006 | 4640 | ap->ops->irq_on(ap); |
c17ea20d TH |
4641 | ata_qc_complete(qc); |
4642 | } else | |
4643 | ata_port_freeze(ap); | |
4644 | } | |
4645 | ||
ba6a1308 | 4646 | spin_unlock_irqrestore(ap->lock, flags); |
c17ea20d TH |
4647 | } else { |
4648 | if (likely(!(qc->err_mask & AC_ERR_HSM))) | |
4649 | ata_qc_complete(qc); | |
4650 | else | |
4651 | ata_port_freeze(ap); | |
4652 | } | |
4653 | } else { | |
4654 | if (in_wq) { | |
ba6a1308 | 4655 | spin_lock_irqsave(ap->lock, flags); |
83625006 | 4656 | ap->ops->irq_on(ap); |
c17ea20d | 4657 | ata_qc_complete(qc); |
ba6a1308 | 4658 | spin_unlock_irqrestore(ap->lock, flags); |
c17ea20d TH |
4659 | } else |
4660 | ata_qc_complete(qc); | |
4661 | } | |
1da177e4 | 4662 | |
c81e29b4 | 4663 | ata_altstatus(ap); /* flush */ |
c17ea20d TH |
4664 | } |
4665 | ||
bb5cb290 AL |
4666 | /** |
4667 | * ata_hsm_move - move the HSM to the next state. | |
4668 | * @ap: the target ata_port | |
4669 | * @qc: qc on going | |
4670 | * @status: current device status | |
4671 | * @in_wq: 1 if called from workqueue, 0 otherwise | |
4672 | * | |
4673 | * RETURNS: | |
4674 | * 1 when poll next status needed, 0 otherwise. | |
4675 | */ | |
9a1004d0 TH |
4676 | int ata_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc, |
4677 | u8 status, int in_wq) | |
e2cec771 | 4678 | { |
bb5cb290 AL |
4679 | unsigned long flags = 0; |
4680 | int poll_next; | |
4681 | ||
6912ccd5 AL |
4682 | WARN_ON((qc->flags & ATA_QCFLAG_ACTIVE) == 0); |
4683 | ||
bb5cb290 AL |
4684 | /* Make sure ata_qc_issue_prot() does not throw things |
4685 | * like DMA polling into the workqueue. Notice that | |
4686 | * in_wq is not equivalent to (qc->tf.flags & ATA_TFLAG_POLLING). | |
4687 | */ | |
c234fb00 | 4688 | WARN_ON(in_wq != ata_hsm_ok_in_wq(ap, qc)); |
bb5cb290 | 4689 | |
e2cec771 | 4690 | fsm_start: |
999bb6f4 | 4691 | DPRINTK("ata%u: protocol %d task_state %d (dev_stat 0x%X)\n", |
44877b4e | 4692 | ap->print_id, qc->tf.protocol, ap->hsm_task_state, status); |
999bb6f4 | 4693 | |
e2cec771 AL |
4694 | switch (ap->hsm_task_state) { |
4695 | case HSM_ST_FIRST: | |
bb5cb290 AL |
4696 | /* Send first data block or PACKET CDB */ |
4697 | ||
4698 | /* If polling, we will stay in the work queue after | |
4699 | * sending the data. Otherwise, interrupt handler | |
4700 | * takes over after sending the data. | |
4701 | */ | |
4702 | poll_next = (qc->tf.flags & ATA_TFLAG_POLLING); | |
4703 | ||
e2cec771 | 4704 | /* check device status */ |
3655d1d3 AL |
4705 | if (unlikely((status & ATA_DRQ) == 0)) { |
4706 | /* handle BSY=0, DRQ=0 as error */ | |
4707 | if (likely(status & (ATA_ERR | ATA_DF))) | |
4708 | /* device stops HSM for abort/error */ | |
4709 | qc->err_mask |= AC_ERR_DEV; | |
4710 | else | |
4711 | /* HSM violation. Let EH handle this */ | |
4712 | qc->err_mask |= AC_ERR_HSM; | |
4713 | ||
14be71f4 | 4714 | ap->hsm_task_state = HSM_ST_ERR; |
e2cec771 | 4715 | goto fsm_start; |
1da177e4 LT |
4716 | } |
4717 | ||
71601958 AL |
4718 | /* Device should not ask for data transfer (DRQ=1) |
4719 | * when it finds something wrong. | |
eee6c32f AL |
4720 | * We ignore DRQ here and stop the HSM by |
4721 | * changing hsm_task_state to HSM_ST_ERR and | |
4722 | * let the EH abort the command or reset the device. | |
71601958 AL |
4723 | */ |
4724 | if (unlikely(status & (ATA_ERR | ATA_DF))) { | |
44877b4e TH |
4725 | ata_port_printk(ap, KERN_WARNING, "DRQ=1 with device " |
4726 | "error, dev_stat 0x%X\n", status); | |
3655d1d3 | 4727 | qc->err_mask |= AC_ERR_HSM; |
eee6c32f AL |
4728 | ap->hsm_task_state = HSM_ST_ERR; |
4729 | goto fsm_start; | |
71601958 | 4730 | } |
1da177e4 | 4731 | |
bb5cb290 AL |
4732 | /* Send the CDB (atapi) or the first data block (ata pio out). |
4733 | * During the state transition, interrupt handler shouldn't | |
4734 | * be invoked before the data transfer is complete and | |
4735 | * hsm_task_state is changed. Hence, the following locking. | |
4736 | */ | |
4737 | if (in_wq) | |
ba6a1308 | 4738 | spin_lock_irqsave(ap->lock, flags); |
1da177e4 | 4739 | |
bb5cb290 AL |
4740 | if (qc->tf.protocol == ATA_PROT_PIO) { |
4741 | /* PIO data out protocol. | |
4742 | * send first data block. | |
4743 | */ | |
0565c26d | 4744 | |
bb5cb290 AL |
4745 | /* ata_pio_sectors() might change the state |
4746 | * to HSM_ST_LAST. so, the state is changed here | |
4747 | * before ata_pio_sectors(). | |
4748 | */ | |
4749 | ap->hsm_task_state = HSM_ST; | |
4750 | ata_pio_sectors(qc); | |
4751 | ata_altstatus(ap); /* flush */ | |
4752 | } else | |
4753 | /* send CDB */ | |
4754 | atapi_send_cdb(ap, qc); | |
4755 | ||
4756 | if (in_wq) | |
ba6a1308 | 4757 | spin_unlock_irqrestore(ap->lock, flags); |
bb5cb290 AL |
4758 | |
4759 | /* if polling, ata_pio_task() handles the rest. | |
4760 | * otherwise, interrupt handler takes over from here. | |
4761 | */ | |
e2cec771 | 4762 | break; |
1c848984 | 4763 | |
e2cec771 AL |
4764 | case HSM_ST: |
4765 | /* complete command or read/write the data register */ | |
4766 | if (qc->tf.protocol == ATA_PROT_ATAPI) { | |
4767 | /* ATAPI PIO protocol */ | |
4768 | if ((status & ATA_DRQ) == 0) { | |
3655d1d3 AL |
4769 | /* No more data to transfer or device error. |
4770 | * Device error will be tagged in HSM_ST_LAST. | |
4771 | */ | |
e2cec771 AL |
4772 | ap->hsm_task_state = HSM_ST_LAST; |
4773 | goto fsm_start; | |
4774 | } | |
1da177e4 | 4775 | |
71601958 AL |
4776 | /* Device should not ask for data transfer (DRQ=1) |
4777 | * when it finds something wrong. | |
eee6c32f AL |
4778 | * We ignore DRQ here and stop the HSM by |
4779 | * changing hsm_task_state to HSM_ST_ERR and | |
4780 | * let the EH abort the command or reset the device. | |
71601958 AL |
4781 | */ |
4782 | if (unlikely(status & (ATA_ERR | ATA_DF))) { | |
44877b4e TH |
4783 | ata_port_printk(ap, KERN_WARNING, "DRQ=1 with " |
4784 | "device error, dev_stat 0x%X\n", | |
4785 | status); | |
3655d1d3 | 4786 | qc->err_mask |= AC_ERR_HSM; |
eee6c32f AL |
4787 | ap->hsm_task_state = HSM_ST_ERR; |
4788 | goto fsm_start; | |
71601958 | 4789 | } |
1da177e4 | 4790 | |
e2cec771 | 4791 | atapi_pio_bytes(qc); |
7fb6ec28 | 4792 | |
e2cec771 AL |
4793 | if (unlikely(ap->hsm_task_state == HSM_ST_ERR)) |
4794 | /* bad ireason reported by device */ | |
4795 | goto fsm_start; | |
1da177e4 | 4796 | |
e2cec771 AL |
4797 | } else { |
4798 | /* ATA PIO protocol */ | |
4799 | if (unlikely((status & ATA_DRQ) == 0)) { | |
4800 | /* handle BSY=0, DRQ=0 as error */ | |
3655d1d3 AL |
4801 | if (likely(status & (ATA_ERR | ATA_DF))) |
4802 | /* device stops HSM for abort/error */ | |
4803 | qc->err_mask |= AC_ERR_DEV; | |
4804 | else | |
55a8e2c8 TH |
4805 | /* HSM violation. Let EH handle this. |
4806 | * Phantom devices also trigger this | |
4807 | * condition. Mark hint. | |
4808 | */ | |
4809 | qc->err_mask |= AC_ERR_HSM | | |
4810 | AC_ERR_NODEV_HINT; | |
3655d1d3 | 4811 | |
e2cec771 AL |
4812 | ap->hsm_task_state = HSM_ST_ERR; |
4813 | goto fsm_start; | |
4814 | } | |
1da177e4 | 4815 | |
eee6c32f AL |
4816 | /* For PIO reads, some devices may ask for |
4817 | * data transfer (DRQ=1) alone with ERR=1. | |
4818 | * We respect DRQ here and transfer one | |
4819 | * block of junk data before changing the | |
4820 | * hsm_task_state to HSM_ST_ERR. | |
4821 | * | |
4822 | * For PIO writes, ERR=1 DRQ=1 doesn't make | |
4823 | * sense since the data block has been | |
4824 | * transferred to the device. | |
71601958 AL |
4825 | */ |
4826 | if (unlikely(status & (ATA_ERR | ATA_DF))) { | |
71601958 AL |
4827 | /* data might be corrputed */ |
4828 | qc->err_mask |= AC_ERR_DEV; | |
eee6c32f AL |
4829 | |
4830 | if (!(qc->tf.flags & ATA_TFLAG_WRITE)) { | |
4831 | ata_pio_sectors(qc); | |
4832 | ata_altstatus(ap); | |
4833 | status = ata_wait_idle(ap); | |
4834 | } | |
4835 | ||
3655d1d3 AL |
4836 | if (status & (ATA_BUSY | ATA_DRQ)) |
4837 | qc->err_mask |= AC_ERR_HSM; | |
4838 | ||
eee6c32f AL |
4839 | /* ata_pio_sectors() might change the |
4840 | * state to HSM_ST_LAST. so, the state | |
4841 | * is changed after ata_pio_sectors(). | |
4842 | */ | |
4843 | ap->hsm_task_state = HSM_ST_ERR; | |
4844 | goto fsm_start; | |
71601958 AL |
4845 | } |
4846 | ||
e2cec771 AL |
4847 | ata_pio_sectors(qc); |
4848 | ||
4849 | if (ap->hsm_task_state == HSM_ST_LAST && | |
4850 | (!(qc->tf.flags & ATA_TFLAG_WRITE))) { | |
4851 | /* all data read */ | |
4852 | ata_altstatus(ap); | |
52a32205 | 4853 | status = ata_wait_idle(ap); |
e2cec771 AL |
4854 | goto fsm_start; |
4855 | } | |
4856 | } | |
4857 | ||
4858 | ata_altstatus(ap); /* flush */ | |
bb5cb290 | 4859 | poll_next = 1; |
1da177e4 LT |
4860 | break; |
4861 | ||
14be71f4 | 4862 | case HSM_ST_LAST: |
6912ccd5 AL |
4863 | if (unlikely(!ata_ok(status))) { |
4864 | qc->err_mask |= __ac_err_mask(status); | |
e2cec771 AL |
4865 | ap->hsm_task_state = HSM_ST_ERR; |
4866 | goto fsm_start; | |
4867 | } | |
4868 | ||
4869 | /* no more data to transfer */ | |
4332a771 | 4870 | DPRINTK("ata%u: dev %u command complete, drv_stat 0x%x\n", |
44877b4e | 4871 | ap->print_id, qc->dev->devno, status); |
e2cec771 | 4872 | |
6912ccd5 AL |
4873 | WARN_ON(qc->err_mask); |
4874 | ||
e2cec771 | 4875 | ap->hsm_task_state = HSM_ST_IDLE; |
1da177e4 | 4876 | |
e2cec771 | 4877 | /* complete taskfile transaction */ |
c17ea20d | 4878 | ata_hsm_qc_complete(qc, in_wq); |
bb5cb290 AL |
4879 | |
4880 | poll_next = 0; | |
1da177e4 LT |
4881 | break; |
4882 | ||
14be71f4 | 4883 | case HSM_ST_ERR: |
e2cec771 AL |
4884 | /* make sure qc->err_mask is available to |
4885 | * know what's wrong and recover | |
4886 | */ | |
4887 | WARN_ON(qc->err_mask == 0); | |
4888 | ||
4889 | ap->hsm_task_state = HSM_ST_IDLE; | |
bb5cb290 | 4890 | |
999bb6f4 | 4891 | /* complete taskfile transaction */ |
c17ea20d | 4892 | ata_hsm_qc_complete(qc, in_wq); |
bb5cb290 AL |
4893 | |
4894 | poll_next = 0; | |
e2cec771 AL |
4895 | break; |
4896 | default: | |
bb5cb290 | 4897 | poll_next = 0; |
6912ccd5 | 4898 | BUG(); |
1da177e4 LT |
4899 | } |
4900 | ||
bb5cb290 | 4901 | return poll_next; |
1da177e4 LT |
4902 | } |
4903 | ||
65f27f38 | 4904 | static void ata_pio_task(struct work_struct *work) |
8061f5f0 | 4905 | { |
65f27f38 DH |
4906 | struct ata_port *ap = |
4907 | container_of(work, struct ata_port, port_task.work); | |
4908 | struct ata_queued_cmd *qc = ap->port_task_data; | |
8061f5f0 | 4909 | u8 status; |
a1af3734 | 4910 | int poll_next; |
8061f5f0 | 4911 | |
7fb6ec28 | 4912 | fsm_start: |
a1af3734 | 4913 | WARN_ON(ap->hsm_task_state == HSM_ST_IDLE); |
8061f5f0 | 4914 | |
a1af3734 AL |
4915 | /* |
4916 | * This is purely heuristic. This is a fast path. | |
4917 | * Sometimes when we enter, BSY will be cleared in | |
4918 | * a chk-status or two. If not, the drive is probably seeking | |
4919 | * or something. Snooze for a couple msecs, then | |
4920 | * chk-status again. If still busy, queue delayed work. | |
4921 | */ | |
4922 | status = ata_busy_wait(ap, ATA_BUSY, 5); | |
4923 | if (status & ATA_BUSY) { | |
4924 | msleep(2); | |
4925 | status = ata_busy_wait(ap, ATA_BUSY, 10); | |
4926 | if (status & ATA_BUSY) { | |
31ce6dae | 4927 | ata_port_queue_task(ap, ata_pio_task, qc, ATA_SHORT_PAUSE); |
a1af3734 AL |
4928 | return; |
4929 | } | |
8061f5f0 TH |
4930 | } |
4931 | ||
a1af3734 AL |
4932 | /* move the HSM */ |
4933 | poll_next = ata_hsm_move(ap, qc, status, 1); | |
8061f5f0 | 4934 | |
a1af3734 AL |
4935 | /* another command or interrupt handler |
4936 | * may be running at this point. | |
4937 | */ | |
4938 | if (poll_next) | |
7fb6ec28 | 4939 | goto fsm_start; |
8061f5f0 TH |
4940 | } |
4941 | ||
1da177e4 LT |
4942 | /** |
4943 | * ata_qc_new - Request an available ATA command, for queueing | |
4944 | * @ap: Port associated with device @dev | |
4945 | * @dev: Device from whom we request an available command structure | |
4946 | * | |
4947 | * LOCKING: | |
0cba632b | 4948 | * None. |
1da177e4 LT |
4949 | */ |
4950 | ||
4951 | static struct ata_queued_cmd *ata_qc_new(struct ata_port *ap) | |
4952 | { | |
4953 | struct ata_queued_cmd *qc = NULL; | |
4954 | unsigned int i; | |
4955 | ||
e3180499 | 4956 | /* no command while frozen */ |
b51e9e5d | 4957 | if (unlikely(ap->pflags & ATA_PFLAG_FROZEN)) |
e3180499 TH |
4958 | return NULL; |
4959 | ||
2ab7db1f TH |
4960 | /* the last tag is reserved for internal command. */ |
4961 | for (i = 0; i < ATA_MAX_QUEUE - 1; i++) | |
6cec4a39 | 4962 | if (!test_and_set_bit(i, &ap->qc_allocated)) { |
f69499f4 | 4963 | qc = __ata_qc_from_tag(ap, i); |
1da177e4 LT |
4964 | break; |
4965 | } | |
4966 | ||
4967 | if (qc) | |
4968 | qc->tag = i; | |
4969 | ||
4970 | return qc; | |
4971 | } | |
4972 | ||
4973 | /** | |
4974 | * ata_qc_new_init - Request an available ATA command, and initialize it | |
1da177e4 LT |
4975 | * @dev: Device from whom we request an available command structure |
4976 | * | |
4977 | * LOCKING: | |
0cba632b | 4978 | * None. |
1da177e4 LT |
4979 | */ |
4980 | ||
3373efd8 | 4981 | struct ata_queued_cmd *ata_qc_new_init(struct ata_device *dev) |
1da177e4 | 4982 | { |
3373efd8 | 4983 | struct ata_port *ap = dev->ap; |
1da177e4 LT |
4984 | struct ata_queued_cmd *qc; |
4985 | ||
4986 | qc = ata_qc_new(ap); | |
4987 | if (qc) { | |
1da177e4 LT |
4988 | qc->scsicmd = NULL; |
4989 | qc->ap = ap; | |
4990 | qc->dev = dev; | |
1da177e4 | 4991 | |
2c13b7ce | 4992 | ata_qc_reinit(qc); |
1da177e4 LT |
4993 | } |
4994 | ||
4995 | return qc; | |
4996 | } | |
4997 | ||
1da177e4 LT |
4998 | /** |
4999 | * ata_qc_free - free unused ata_queued_cmd | |
5000 | * @qc: Command to complete | |
5001 | * | |
5002 | * Designed to free unused ata_queued_cmd object | |
5003 | * in case something prevents using it. | |
5004 | * | |
5005 | * LOCKING: | |
cca3974e | 5006 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
5007 | */ |
5008 | void ata_qc_free(struct ata_queued_cmd *qc) | |
5009 | { | |
4ba946e9 TH |
5010 | struct ata_port *ap = qc->ap; |
5011 | unsigned int tag; | |
5012 | ||
a4631474 | 5013 | WARN_ON(qc == NULL); /* ata_qc_from_tag _might_ return NULL */ |
1da177e4 | 5014 | |
4ba946e9 TH |
5015 | qc->flags = 0; |
5016 | tag = qc->tag; | |
5017 | if (likely(ata_tag_valid(tag))) { | |
4ba946e9 | 5018 | qc->tag = ATA_TAG_POISON; |
6cec4a39 | 5019 | clear_bit(tag, &ap->qc_allocated); |
4ba946e9 | 5020 | } |
1da177e4 LT |
5021 | } |
5022 | ||
76014427 | 5023 | void __ata_qc_complete(struct ata_queued_cmd *qc) |
1da177e4 | 5024 | { |
dedaf2b0 TH |
5025 | struct ata_port *ap = qc->ap; |
5026 | ||
a4631474 TH |
5027 | WARN_ON(qc == NULL); /* ata_qc_from_tag _might_ return NULL */ |
5028 | WARN_ON(!(qc->flags & ATA_QCFLAG_ACTIVE)); | |
1da177e4 LT |
5029 | |
5030 | if (likely(qc->flags & ATA_QCFLAG_DMAMAP)) | |
5031 | ata_sg_clean(qc); | |
5032 | ||
7401abf2 | 5033 | /* command should be marked inactive atomically with qc completion */ |
dedaf2b0 TH |
5034 | if (qc->tf.protocol == ATA_PROT_NCQ) |
5035 | ap->sactive &= ~(1 << qc->tag); | |
5036 | else | |
5037 | ap->active_tag = ATA_TAG_POISON; | |
7401abf2 | 5038 | |
3f3791d3 AL |
5039 | /* atapi: mark qc as inactive to prevent the interrupt handler |
5040 | * from completing the command twice later, before the error handler | |
5041 | * is called. (when rc != 0 and atapi request sense is needed) | |
5042 | */ | |
5043 | qc->flags &= ~ATA_QCFLAG_ACTIVE; | |
dedaf2b0 | 5044 | ap->qc_active &= ~(1 << qc->tag); |
3f3791d3 | 5045 | |
1da177e4 | 5046 | /* call completion callback */ |
77853bf2 | 5047 | qc->complete_fn(qc); |
1da177e4 LT |
5048 | } |
5049 | ||
39599a53 TH |
5050 | static void fill_result_tf(struct ata_queued_cmd *qc) |
5051 | { | |
5052 | struct ata_port *ap = qc->ap; | |
5053 | ||
39599a53 | 5054 | qc->result_tf.flags = qc->tf.flags; |
4742d54f | 5055 | ap->ops->tf_read(ap, &qc->result_tf); |
39599a53 TH |
5056 | } |
5057 | ||
f686bcb8 TH |
5058 | /** |
5059 | * ata_qc_complete - Complete an active ATA command | |
5060 | * @qc: Command to complete | |
5061 | * @err_mask: ATA Status register contents | |
5062 | * | |
5063 | * Indicate to the mid and upper layers that an ATA | |
5064 | * command has completed, with either an ok or not-ok status. | |
5065 | * | |
5066 | * LOCKING: | |
cca3974e | 5067 | * spin_lock_irqsave(host lock) |
f686bcb8 TH |
5068 | */ |
5069 | void ata_qc_complete(struct ata_queued_cmd *qc) | |
5070 | { | |
5071 | struct ata_port *ap = qc->ap; | |
5072 | ||
5073 | /* XXX: New EH and old EH use different mechanisms to | |
5074 | * synchronize EH with regular execution path. | |
5075 | * | |
5076 | * In new EH, a failed qc is marked with ATA_QCFLAG_FAILED. | |
5077 | * Normal execution path is responsible for not accessing a | |
5078 | * failed qc. libata core enforces the rule by returning NULL | |
5079 | * from ata_qc_from_tag() for failed qcs. | |
5080 | * | |
5081 | * Old EH depends on ata_qc_complete() nullifying completion | |
5082 | * requests if ATA_QCFLAG_EH_SCHEDULED is set. Old EH does | |
5083 | * not synchronize with interrupt handler. Only PIO task is | |
5084 | * taken care of. | |
5085 | */ | |
5086 | if (ap->ops->error_handler) { | |
b51e9e5d | 5087 | WARN_ON(ap->pflags & ATA_PFLAG_FROZEN); |
f686bcb8 TH |
5088 | |
5089 | if (unlikely(qc->err_mask)) | |
5090 | qc->flags |= ATA_QCFLAG_FAILED; | |
5091 | ||
5092 | if (unlikely(qc->flags & ATA_QCFLAG_FAILED)) { | |
5093 | if (!ata_tag_internal(qc->tag)) { | |
5094 | /* always fill result TF for failed qc */ | |
39599a53 | 5095 | fill_result_tf(qc); |
f686bcb8 TH |
5096 | ata_qc_schedule_eh(qc); |
5097 | return; | |
5098 | } | |
5099 | } | |
5100 | ||
5101 | /* read result TF if requested */ | |
5102 | if (qc->flags & ATA_QCFLAG_RESULT_TF) | |
39599a53 | 5103 | fill_result_tf(qc); |
f686bcb8 TH |
5104 | |
5105 | __ata_qc_complete(qc); | |
5106 | } else { | |
5107 | if (qc->flags & ATA_QCFLAG_EH_SCHEDULED) | |
5108 | return; | |
5109 | ||
5110 | /* read result TF if failed or requested */ | |
5111 | if (qc->err_mask || qc->flags & ATA_QCFLAG_RESULT_TF) | |
39599a53 | 5112 | fill_result_tf(qc); |
f686bcb8 TH |
5113 | |
5114 | __ata_qc_complete(qc); | |
5115 | } | |
5116 | } | |
5117 | ||
dedaf2b0 TH |
5118 | /** |
5119 | * ata_qc_complete_multiple - Complete multiple qcs successfully | |
5120 | * @ap: port in question | |
5121 | * @qc_active: new qc_active mask | |
5122 | * @finish_qc: LLDD callback invoked before completing a qc | |
5123 | * | |
5124 | * Complete in-flight commands. This functions is meant to be | |
5125 | * called from low-level driver's interrupt routine to complete | |
5126 | * requests normally. ap->qc_active and @qc_active is compared | |
5127 | * and commands are completed accordingly. | |
5128 | * | |
5129 | * LOCKING: | |
cca3974e | 5130 | * spin_lock_irqsave(host lock) |
dedaf2b0 TH |
5131 | * |
5132 | * RETURNS: | |
5133 | * Number of completed commands on success, -errno otherwise. | |
5134 | */ | |
5135 | int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active, | |
5136 | void (*finish_qc)(struct ata_queued_cmd *)) | |
5137 | { | |
5138 | int nr_done = 0; | |
5139 | u32 done_mask; | |
5140 | int i; | |
5141 | ||
5142 | done_mask = ap->qc_active ^ qc_active; | |
5143 | ||
5144 | if (unlikely(done_mask & qc_active)) { | |
5145 | ata_port_printk(ap, KERN_ERR, "illegal qc_active transition " | |
5146 | "(%08x->%08x)\n", ap->qc_active, qc_active); | |
5147 | return -EINVAL; | |
5148 | } | |
5149 | ||
5150 | for (i = 0; i < ATA_MAX_QUEUE; i++) { | |
5151 | struct ata_queued_cmd *qc; | |
5152 | ||
5153 | if (!(done_mask & (1 << i))) | |
5154 | continue; | |
5155 | ||
5156 | if ((qc = ata_qc_from_tag(ap, i))) { | |
5157 | if (finish_qc) | |
5158 | finish_qc(qc); | |
5159 | ata_qc_complete(qc); | |
5160 | nr_done++; | |
5161 | } | |
5162 | } | |
5163 | ||
5164 | return nr_done; | |
5165 | } | |
5166 | ||
1da177e4 LT |
5167 | static inline int ata_should_dma_map(struct ata_queued_cmd *qc) |
5168 | { | |
5169 | struct ata_port *ap = qc->ap; | |
5170 | ||
5171 | switch (qc->tf.protocol) { | |
3dc1d881 | 5172 | case ATA_PROT_NCQ: |
1da177e4 LT |
5173 | case ATA_PROT_DMA: |
5174 | case ATA_PROT_ATAPI_DMA: | |
5175 | return 1; | |
5176 | ||
5177 | case ATA_PROT_ATAPI: | |
5178 | case ATA_PROT_PIO: | |
1da177e4 LT |
5179 | if (ap->flags & ATA_FLAG_PIO_DMA) |
5180 | return 1; | |
5181 | ||
5182 | /* fall through */ | |
5183 | ||
5184 | default: | |
5185 | return 0; | |
5186 | } | |
5187 | ||
5188 | /* never reached */ | |
5189 | } | |
5190 | ||
5191 | /** | |
5192 | * ata_qc_issue - issue taskfile to device | |
5193 | * @qc: command to issue to device | |
5194 | * | |
5195 | * Prepare an ATA command to submission to device. | |
5196 | * This includes mapping the data into a DMA-able | |
5197 | * area, filling in the S/G table, and finally | |
5198 | * writing the taskfile to hardware, starting the command. | |
5199 | * | |
5200 | * LOCKING: | |
cca3974e | 5201 | * spin_lock_irqsave(host lock) |
1da177e4 | 5202 | */ |
8e0e694a | 5203 | void ata_qc_issue(struct ata_queued_cmd *qc) |
1da177e4 LT |
5204 | { |
5205 | struct ata_port *ap = qc->ap; | |
5206 | ||
dedaf2b0 TH |
5207 | /* Make sure only one non-NCQ command is outstanding. The |
5208 | * check is skipped for old EH because it reuses active qc to | |
5209 | * request ATAPI sense. | |
5210 | */ | |
5211 | WARN_ON(ap->ops->error_handler && ata_tag_valid(ap->active_tag)); | |
5212 | ||
5213 | if (qc->tf.protocol == ATA_PROT_NCQ) { | |
5214 | WARN_ON(ap->sactive & (1 << qc->tag)); | |
5215 | ap->sactive |= 1 << qc->tag; | |
5216 | } else { | |
5217 | WARN_ON(ap->sactive); | |
5218 | ap->active_tag = qc->tag; | |
5219 | } | |
5220 | ||
e4a70e76 | 5221 | qc->flags |= ATA_QCFLAG_ACTIVE; |
dedaf2b0 | 5222 | ap->qc_active |= 1 << qc->tag; |
e4a70e76 | 5223 | |
1da177e4 LT |
5224 | if (ata_should_dma_map(qc)) { |
5225 | if (qc->flags & ATA_QCFLAG_SG) { | |
5226 | if (ata_sg_setup(qc)) | |
8e436af9 | 5227 | goto sg_err; |
1da177e4 LT |
5228 | } else if (qc->flags & ATA_QCFLAG_SINGLE) { |
5229 | if (ata_sg_setup_one(qc)) | |
8e436af9 | 5230 | goto sg_err; |
1da177e4 LT |
5231 | } |
5232 | } else { | |
5233 | qc->flags &= ~ATA_QCFLAG_DMAMAP; | |
5234 | } | |
5235 | ||
5236 | ap->ops->qc_prep(qc); | |
5237 | ||
8e0e694a TH |
5238 | qc->err_mask |= ap->ops->qc_issue(qc); |
5239 | if (unlikely(qc->err_mask)) | |
5240 | goto err; | |
5241 | return; | |
1da177e4 | 5242 | |
8e436af9 TH |
5243 | sg_err: |
5244 | qc->flags &= ~ATA_QCFLAG_DMAMAP; | |
8e0e694a TH |
5245 | qc->err_mask |= AC_ERR_SYSTEM; |
5246 | err: | |
5247 | ata_qc_complete(qc); | |
1da177e4 LT |
5248 | } |
5249 | ||
5250 | /** | |
5251 | * ata_qc_issue_prot - issue taskfile to device in proto-dependent manner | |
5252 | * @qc: command to issue to device | |
5253 | * | |
5254 | * Using various libata functions and hooks, this function | |
5255 | * starts an ATA command. ATA commands are grouped into | |
5256 | * classes called "protocols", and issuing each type of protocol | |
5257 | * is slightly different. | |
5258 | * | |
0baab86b EF |
5259 | * May be used as the qc_issue() entry in ata_port_operations. |
5260 | * | |
1da177e4 | 5261 | * LOCKING: |
cca3974e | 5262 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
5263 | * |
5264 | * RETURNS: | |
9a3d9eb0 | 5265 | * Zero on success, AC_ERR_* mask on failure |
1da177e4 LT |
5266 | */ |
5267 | ||
9a3d9eb0 | 5268 | unsigned int ata_qc_issue_prot(struct ata_queued_cmd *qc) |
1da177e4 LT |
5269 | { |
5270 | struct ata_port *ap = qc->ap; | |
5271 | ||
e50362ec AL |
5272 | /* Use polling pio if the LLD doesn't handle |
5273 | * interrupt driven pio and atapi CDB interrupt. | |
5274 | */ | |
5275 | if (ap->flags & ATA_FLAG_PIO_POLLING) { | |
5276 | switch (qc->tf.protocol) { | |
5277 | case ATA_PROT_PIO: | |
e3472cbe | 5278 | case ATA_PROT_NODATA: |
e50362ec AL |
5279 | case ATA_PROT_ATAPI: |
5280 | case ATA_PROT_ATAPI_NODATA: | |
5281 | qc->tf.flags |= ATA_TFLAG_POLLING; | |
5282 | break; | |
5283 | case ATA_PROT_ATAPI_DMA: | |
5284 | if (qc->dev->flags & ATA_DFLAG_CDB_INTR) | |
3a778275 | 5285 | /* see ata_dma_blacklisted() */ |
e50362ec AL |
5286 | BUG(); |
5287 | break; | |
5288 | default: | |
5289 | break; | |
5290 | } | |
5291 | } | |
5292 | ||
3d3cca37 TH |
5293 | /* Some controllers show flaky interrupt behavior after |
5294 | * setting xfer mode. Use polling instead. | |
5295 | */ | |
5296 | if (unlikely(qc->tf.command == ATA_CMD_SET_FEATURES && | |
5297 | qc->tf.feature == SETFEATURES_XFER) && | |
5298 | (ap->flags & ATA_FLAG_SETXFER_POLLING)) | |
5299 | qc->tf.flags |= ATA_TFLAG_POLLING; | |
5300 | ||
312f7da2 | 5301 | /* select the device */ |
1da177e4 LT |
5302 | ata_dev_select(ap, qc->dev->devno, 1, 0); |
5303 | ||
312f7da2 | 5304 | /* start the command */ |
1da177e4 LT |
5305 | switch (qc->tf.protocol) { |
5306 | case ATA_PROT_NODATA: | |
312f7da2 AL |
5307 | if (qc->tf.flags & ATA_TFLAG_POLLING) |
5308 | ata_qc_set_polling(qc); | |
5309 | ||
e5338254 | 5310 | ata_tf_to_host(ap, &qc->tf); |
312f7da2 AL |
5311 | ap->hsm_task_state = HSM_ST_LAST; |
5312 | ||
5313 | if (qc->tf.flags & ATA_TFLAG_POLLING) | |
31ce6dae | 5314 | ata_port_queue_task(ap, ata_pio_task, qc, 0); |
312f7da2 | 5315 | |
1da177e4 LT |
5316 | break; |
5317 | ||
5318 | case ATA_PROT_DMA: | |
587005de | 5319 | WARN_ON(qc->tf.flags & ATA_TFLAG_POLLING); |
312f7da2 | 5320 | |
1da177e4 LT |
5321 | ap->ops->tf_load(ap, &qc->tf); /* load tf registers */ |
5322 | ap->ops->bmdma_setup(qc); /* set up bmdma */ | |
5323 | ap->ops->bmdma_start(qc); /* initiate bmdma */ | |
312f7da2 | 5324 | ap->hsm_task_state = HSM_ST_LAST; |
1da177e4 LT |
5325 | break; |
5326 | ||
312f7da2 AL |
5327 | case ATA_PROT_PIO: |
5328 | if (qc->tf.flags & ATA_TFLAG_POLLING) | |
5329 | ata_qc_set_polling(qc); | |
1da177e4 | 5330 | |
e5338254 | 5331 | ata_tf_to_host(ap, &qc->tf); |
312f7da2 | 5332 | |
54f00389 AL |
5333 | if (qc->tf.flags & ATA_TFLAG_WRITE) { |
5334 | /* PIO data out protocol */ | |
5335 | ap->hsm_task_state = HSM_ST_FIRST; | |
31ce6dae | 5336 | ata_port_queue_task(ap, ata_pio_task, qc, 0); |
54f00389 AL |
5337 | |
5338 | /* always send first data block using | |
e27486db | 5339 | * the ata_pio_task() codepath. |
54f00389 | 5340 | */ |
312f7da2 | 5341 | } else { |
54f00389 AL |
5342 | /* PIO data in protocol */ |
5343 | ap->hsm_task_state = HSM_ST; | |
5344 | ||
5345 | if (qc->tf.flags & ATA_TFLAG_POLLING) | |
31ce6dae | 5346 | ata_port_queue_task(ap, ata_pio_task, qc, 0); |
54f00389 AL |
5347 | |
5348 | /* if polling, ata_pio_task() handles the rest. | |
5349 | * otherwise, interrupt handler takes over from here. | |
5350 | */ | |
312f7da2 AL |
5351 | } |
5352 | ||
1da177e4 LT |
5353 | break; |
5354 | ||
1da177e4 | 5355 | case ATA_PROT_ATAPI: |
1da177e4 | 5356 | case ATA_PROT_ATAPI_NODATA: |
312f7da2 AL |
5357 | if (qc->tf.flags & ATA_TFLAG_POLLING) |
5358 | ata_qc_set_polling(qc); | |
5359 | ||
e5338254 | 5360 | ata_tf_to_host(ap, &qc->tf); |
f6ef65e6 | 5361 | |
312f7da2 AL |
5362 | ap->hsm_task_state = HSM_ST_FIRST; |
5363 | ||
5364 | /* send cdb by polling if no cdb interrupt */ | |
5365 | if ((!(qc->dev->flags & ATA_DFLAG_CDB_INTR)) || | |
5366 | (qc->tf.flags & ATA_TFLAG_POLLING)) | |
31ce6dae | 5367 | ata_port_queue_task(ap, ata_pio_task, qc, 0); |
1da177e4 LT |
5368 | break; |
5369 | ||
5370 | case ATA_PROT_ATAPI_DMA: | |
587005de | 5371 | WARN_ON(qc->tf.flags & ATA_TFLAG_POLLING); |
312f7da2 | 5372 | |
1da177e4 LT |
5373 | ap->ops->tf_load(ap, &qc->tf); /* load tf registers */ |
5374 | ap->ops->bmdma_setup(qc); /* set up bmdma */ | |
312f7da2 AL |
5375 | ap->hsm_task_state = HSM_ST_FIRST; |
5376 | ||
5377 | /* send cdb by polling if no cdb interrupt */ | |
5378 | if (!(qc->dev->flags & ATA_DFLAG_CDB_INTR)) | |
31ce6dae | 5379 | ata_port_queue_task(ap, ata_pio_task, qc, 0); |
1da177e4 LT |
5380 | break; |
5381 | ||
5382 | default: | |
5383 | WARN_ON(1); | |
9a3d9eb0 | 5384 | return AC_ERR_SYSTEM; |
1da177e4 LT |
5385 | } |
5386 | ||
5387 | return 0; | |
5388 | } | |
5389 | ||
1da177e4 LT |
5390 | /** |
5391 | * ata_host_intr - Handle host interrupt for given (port, task) | |
5392 | * @ap: Port on which interrupt arrived (possibly...) | |
5393 | * @qc: Taskfile currently active in engine | |
5394 | * | |
5395 | * Handle host interrupt for given queued command. Currently, | |
5396 | * only DMA interrupts are handled. All other commands are | |
5397 | * handled via polling with interrupts disabled (nIEN bit). | |
5398 | * | |
5399 | * LOCKING: | |
cca3974e | 5400 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
5401 | * |
5402 | * RETURNS: | |
5403 | * One if interrupt was handled, zero if not (shared irq). | |
5404 | */ | |
5405 | ||
5406 | inline unsigned int ata_host_intr (struct ata_port *ap, | |
5407 | struct ata_queued_cmd *qc) | |
5408 | { | |
ea54763f | 5409 | struct ata_eh_info *ehi = &ap->eh_info; |
312f7da2 | 5410 | u8 status, host_stat = 0; |
1da177e4 | 5411 | |
312f7da2 | 5412 | VPRINTK("ata%u: protocol %d task_state %d\n", |
44877b4e | 5413 | ap->print_id, qc->tf.protocol, ap->hsm_task_state); |
1da177e4 | 5414 | |
312f7da2 AL |
5415 | /* Check whether we are expecting interrupt in this state */ |
5416 | switch (ap->hsm_task_state) { | |
5417 | case HSM_ST_FIRST: | |
6912ccd5 AL |
5418 | /* Some pre-ATAPI-4 devices assert INTRQ |
5419 | * at this state when ready to receive CDB. | |
5420 | */ | |
1da177e4 | 5421 | |
312f7da2 AL |
5422 | /* Check the ATA_DFLAG_CDB_INTR flag is enough here. |
5423 | * The flag was turned on only for atapi devices. | |
5424 | * No need to check is_atapi_taskfile(&qc->tf) again. | |
5425 | */ | |
5426 | if (!(qc->dev->flags & ATA_DFLAG_CDB_INTR)) | |
1da177e4 | 5427 | goto idle_irq; |
1da177e4 | 5428 | break; |
312f7da2 AL |
5429 | case HSM_ST_LAST: |
5430 | if (qc->tf.protocol == ATA_PROT_DMA || | |
5431 | qc->tf.protocol == ATA_PROT_ATAPI_DMA) { | |
5432 | /* check status of DMA engine */ | |
5433 | host_stat = ap->ops->bmdma_status(ap); | |
44877b4e TH |
5434 | VPRINTK("ata%u: host_stat 0x%X\n", |
5435 | ap->print_id, host_stat); | |
312f7da2 AL |
5436 | |
5437 | /* if it's not our irq... */ | |
5438 | if (!(host_stat & ATA_DMA_INTR)) | |
5439 | goto idle_irq; | |
5440 | ||
5441 | /* before we do anything else, clear DMA-Start bit */ | |
5442 | ap->ops->bmdma_stop(qc); | |
a4f16610 AL |
5443 | |
5444 | if (unlikely(host_stat & ATA_DMA_ERR)) { | |
5445 | /* error when transfering data to/from memory */ | |
5446 | qc->err_mask |= AC_ERR_HOST_BUS; | |
5447 | ap->hsm_task_state = HSM_ST_ERR; | |
5448 | } | |
312f7da2 AL |
5449 | } |
5450 | break; | |
5451 | case HSM_ST: | |
5452 | break; | |
1da177e4 LT |
5453 | default: |
5454 | goto idle_irq; | |
5455 | } | |
5456 | ||
312f7da2 AL |
5457 | /* check altstatus */ |
5458 | status = ata_altstatus(ap); | |
5459 | if (status & ATA_BUSY) | |
5460 | goto idle_irq; | |
1da177e4 | 5461 | |
312f7da2 AL |
5462 | /* check main status, clearing INTRQ */ |
5463 | status = ata_chk_status(ap); | |
5464 | if (unlikely(status & ATA_BUSY)) | |
5465 | goto idle_irq; | |
1da177e4 | 5466 | |
312f7da2 AL |
5467 | /* ack bmdma irq events */ |
5468 | ap->ops->irq_clear(ap); | |
1da177e4 | 5469 | |
bb5cb290 | 5470 | ata_hsm_move(ap, qc, status, 0); |
ea54763f TH |
5471 | |
5472 | if (unlikely(qc->err_mask) && (qc->tf.protocol == ATA_PROT_DMA || | |
5473 | qc->tf.protocol == ATA_PROT_ATAPI_DMA)) | |
5474 | ata_ehi_push_desc(ehi, "BMDMA stat 0x%x", host_stat); | |
5475 | ||
1da177e4 LT |
5476 | return 1; /* irq handled */ |
5477 | ||
5478 | idle_irq: | |
5479 | ap->stats.idle_irq++; | |
5480 | ||
5481 | #ifdef ATA_IRQ_TRAP | |
5482 | if ((ap->stats.idle_irq % 1000) == 0) { | |
83625006 | 5483 | ap->ops->irq_ack(ap, 0); /* debug trap */ |
f15a1daf | 5484 | ata_port_printk(ap, KERN_WARNING, "irq trap\n"); |
23cfce89 | 5485 | return 1; |
1da177e4 LT |
5486 | } |
5487 | #endif | |
5488 | return 0; /* irq not handled */ | |
5489 | } | |
5490 | ||
5491 | /** | |
5492 | * ata_interrupt - Default ATA host interrupt handler | |
0cba632b | 5493 | * @irq: irq line (unused) |
cca3974e | 5494 | * @dev_instance: pointer to our ata_host information structure |
1da177e4 | 5495 | * |
0cba632b JG |
5496 | * Default interrupt handler for PCI IDE devices. Calls |
5497 | * ata_host_intr() for each port that is not disabled. | |
5498 | * | |
1da177e4 | 5499 | * LOCKING: |
cca3974e | 5500 | * Obtains host lock during operation. |
1da177e4 LT |
5501 | * |
5502 | * RETURNS: | |
0cba632b | 5503 | * IRQ_NONE or IRQ_HANDLED. |
1da177e4 LT |
5504 | */ |
5505 | ||
7d12e780 | 5506 | irqreturn_t ata_interrupt (int irq, void *dev_instance) |
1da177e4 | 5507 | { |
cca3974e | 5508 | struct ata_host *host = dev_instance; |
1da177e4 LT |
5509 | unsigned int i; |
5510 | unsigned int handled = 0; | |
5511 | unsigned long flags; | |
5512 | ||
5513 | /* TODO: make _irqsave conditional on x86 PCI IDE legacy mode */ | |
cca3974e | 5514 | spin_lock_irqsave(&host->lock, flags); |
1da177e4 | 5515 | |
cca3974e | 5516 | for (i = 0; i < host->n_ports; i++) { |
1da177e4 LT |
5517 | struct ata_port *ap; |
5518 | ||
cca3974e | 5519 | ap = host->ports[i]; |
c1389503 | 5520 | if (ap && |
029f5468 | 5521 | !(ap->flags & ATA_FLAG_DISABLED)) { |
1da177e4 LT |
5522 | struct ata_queued_cmd *qc; |
5523 | ||
5524 | qc = ata_qc_from_tag(ap, ap->active_tag); | |
312f7da2 | 5525 | if (qc && (!(qc->tf.flags & ATA_TFLAG_POLLING)) && |
21b1ed74 | 5526 | (qc->flags & ATA_QCFLAG_ACTIVE)) |
1da177e4 LT |
5527 | handled |= ata_host_intr(ap, qc); |
5528 | } | |
5529 | } | |
5530 | ||
cca3974e | 5531 | spin_unlock_irqrestore(&host->lock, flags); |
1da177e4 LT |
5532 | |
5533 | return IRQ_RETVAL(handled); | |
5534 | } | |
5535 | ||
34bf2170 TH |
5536 | /** |
5537 | * sata_scr_valid - test whether SCRs are accessible | |
5538 | * @ap: ATA port to test SCR accessibility for | |
5539 | * | |
5540 | * Test whether SCRs are accessible for @ap. | |
5541 | * | |
5542 | * LOCKING: | |
5543 | * None. | |
5544 | * | |
5545 | * RETURNS: | |
5546 | * 1 if SCRs are accessible, 0 otherwise. | |
5547 | */ | |
5548 | int sata_scr_valid(struct ata_port *ap) | |
5549 | { | |
5550 | return ap->cbl == ATA_CBL_SATA && ap->ops->scr_read; | |
5551 | } | |
5552 | ||
5553 | /** | |
5554 | * sata_scr_read - read SCR register of the specified port | |
5555 | * @ap: ATA port to read SCR for | |
5556 | * @reg: SCR to read | |
5557 | * @val: Place to store read value | |
5558 | * | |
5559 | * Read SCR register @reg of @ap into *@val. This function is | |
5560 | * guaranteed to succeed if the cable type of the port is SATA | |
5561 | * and the port implements ->scr_read. | |
5562 | * | |
5563 | * LOCKING: | |
5564 | * None. | |
5565 | * | |
5566 | * RETURNS: | |
5567 | * 0 on success, negative errno on failure. | |
5568 | */ | |
5569 | int sata_scr_read(struct ata_port *ap, int reg, u32 *val) | |
5570 | { | |
5571 | if (sata_scr_valid(ap)) { | |
5572 | *val = ap->ops->scr_read(ap, reg); | |
5573 | return 0; | |
5574 | } | |
5575 | return -EOPNOTSUPP; | |
5576 | } | |
5577 | ||
5578 | /** | |
5579 | * sata_scr_write - write SCR register of the specified port | |
5580 | * @ap: ATA port to write SCR for | |
5581 | * @reg: SCR to write | |
5582 | * @val: value to write | |
5583 | * | |
5584 | * Write @val to SCR register @reg of @ap. This function is | |
5585 | * guaranteed to succeed if the cable type of the port is SATA | |
5586 | * and the port implements ->scr_read. | |
5587 | * | |
5588 | * LOCKING: | |
5589 | * None. | |
5590 | * | |
5591 | * RETURNS: | |
5592 | * 0 on success, negative errno on failure. | |
5593 | */ | |
5594 | int sata_scr_write(struct ata_port *ap, int reg, u32 val) | |
5595 | { | |
5596 | if (sata_scr_valid(ap)) { | |
5597 | ap->ops->scr_write(ap, reg, val); | |
5598 | return 0; | |
5599 | } | |
5600 | return -EOPNOTSUPP; | |
5601 | } | |
5602 | ||
5603 | /** | |
5604 | * sata_scr_write_flush - write SCR register of the specified port and flush | |
5605 | * @ap: ATA port to write SCR for | |
5606 | * @reg: SCR to write | |
5607 | * @val: value to write | |
5608 | * | |
5609 | * This function is identical to sata_scr_write() except that this | |
5610 | * function performs flush after writing to the register. | |
5611 | * | |
5612 | * LOCKING: | |
5613 | * None. | |
5614 | * | |
5615 | * RETURNS: | |
5616 | * 0 on success, negative errno on failure. | |
5617 | */ | |
5618 | int sata_scr_write_flush(struct ata_port *ap, int reg, u32 val) | |
5619 | { | |
5620 | if (sata_scr_valid(ap)) { | |
5621 | ap->ops->scr_write(ap, reg, val); | |
5622 | ap->ops->scr_read(ap, reg); | |
5623 | return 0; | |
5624 | } | |
5625 | return -EOPNOTSUPP; | |
5626 | } | |
5627 | ||
5628 | /** | |
5629 | * ata_port_online - test whether the given port is online | |
5630 | * @ap: ATA port to test | |
5631 | * | |
5632 | * Test whether @ap is online. Note that this function returns 0 | |
5633 | * if online status of @ap cannot be obtained, so | |
5634 | * ata_port_online(ap) != !ata_port_offline(ap). | |
5635 | * | |
5636 | * LOCKING: | |
5637 | * None. | |
5638 | * | |
5639 | * RETURNS: | |
5640 | * 1 if the port online status is available and online. | |
5641 | */ | |
5642 | int ata_port_online(struct ata_port *ap) | |
5643 | { | |
5644 | u32 sstatus; | |
5645 | ||
5646 | if (!sata_scr_read(ap, SCR_STATUS, &sstatus) && (sstatus & 0xf) == 0x3) | |
5647 | return 1; | |
5648 | return 0; | |
5649 | } | |
5650 | ||
5651 | /** | |
5652 | * ata_port_offline - test whether the given port is offline | |
5653 | * @ap: ATA port to test | |
5654 | * | |
5655 | * Test whether @ap is offline. Note that this function returns | |
5656 | * 0 if offline status of @ap cannot be obtained, so | |
5657 | * ata_port_online(ap) != !ata_port_offline(ap). | |
5658 | * | |
5659 | * LOCKING: | |
5660 | * None. | |
5661 | * | |
5662 | * RETURNS: | |
5663 | * 1 if the port offline status is available and offline. | |
5664 | */ | |
5665 | int ata_port_offline(struct ata_port *ap) | |
5666 | { | |
5667 | u32 sstatus; | |
5668 | ||
5669 | if (!sata_scr_read(ap, SCR_STATUS, &sstatus) && (sstatus & 0xf) != 0x3) | |
5670 | return 1; | |
5671 | return 0; | |
5672 | } | |
0baab86b | 5673 | |
77b08fb5 | 5674 | int ata_flush_cache(struct ata_device *dev) |
9b847548 | 5675 | { |
977e6b9f | 5676 | unsigned int err_mask; |
9b847548 JA |
5677 | u8 cmd; |
5678 | ||
5679 | if (!ata_try_flush_cache(dev)) | |
5680 | return 0; | |
5681 | ||
6fc49adb | 5682 | if (dev->flags & ATA_DFLAG_FLUSH_EXT) |
9b847548 JA |
5683 | cmd = ATA_CMD_FLUSH_EXT; |
5684 | else | |
5685 | cmd = ATA_CMD_FLUSH; | |
5686 | ||
977e6b9f TH |
5687 | err_mask = ata_do_simple_cmd(dev, cmd); |
5688 | if (err_mask) { | |
5689 | ata_dev_printk(dev, KERN_ERR, "failed to flush cache\n"); | |
5690 | return -EIO; | |
5691 | } | |
5692 | ||
5693 | return 0; | |
9b847548 JA |
5694 | } |
5695 | ||
6ffa01d8 | 5696 | #ifdef CONFIG_PM |
cca3974e JG |
5697 | static int ata_host_request_pm(struct ata_host *host, pm_message_t mesg, |
5698 | unsigned int action, unsigned int ehi_flags, | |
5699 | int wait) | |
500530f6 TH |
5700 | { |
5701 | unsigned long flags; | |
5702 | int i, rc; | |
5703 | ||
cca3974e JG |
5704 | for (i = 0; i < host->n_ports; i++) { |
5705 | struct ata_port *ap = host->ports[i]; | |
500530f6 TH |
5706 | |
5707 | /* Previous resume operation might still be in | |
5708 | * progress. Wait for PM_PENDING to clear. | |
5709 | */ | |
5710 | if (ap->pflags & ATA_PFLAG_PM_PENDING) { | |
5711 | ata_port_wait_eh(ap); | |
5712 | WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING); | |
5713 | } | |
5714 | ||
5715 | /* request PM ops to EH */ | |
5716 | spin_lock_irqsave(ap->lock, flags); | |
5717 | ||
5718 | ap->pm_mesg = mesg; | |
5719 | if (wait) { | |
5720 | rc = 0; | |
5721 | ap->pm_result = &rc; | |
5722 | } | |
5723 | ||
5724 | ap->pflags |= ATA_PFLAG_PM_PENDING; | |
5725 | ap->eh_info.action |= action; | |
5726 | ap->eh_info.flags |= ehi_flags; | |
5727 | ||
5728 | ata_port_schedule_eh(ap); | |
5729 | ||
5730 | spin_unlock_irqrestore(ap->lock, flags); | |
5731 | ||
5732 | /* wait and check result */ | |
5733 | if (wait) { | |
5734 | ata_port_wait_eh(ap); | |
5735 | WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING); | |
5736 | if (rc) | |
5737 | return rc; | |
5738 | } | |
5739 | } | |
5740 | ||
5741 | return 0; | |
5742 | } | |
5743 | ||
5744 | /** | |
cca3974e JG |
5745 | * ata_host_suspend - suspend host |
5746 | * @host: host to suspend | |
500530f6 TH |
5747 | * @mesg: PM message |
5748 | * | |
cca3974e | 5749 | * Suspend @host. Actual operation is performed by EH. This |
500530f6 TH |
5750 | * function requests EH to perform PM operations and waits for EH |
5751 | * to finish. | |
5752 | * | |
5753 | * LOCKING: | |
5754 | * Kernel thread context (may sleep). | |
5755 | * | |
5756 | * RETURNS: | |
5757 | * 0 on success, -errno on failure. | |
5758 | */ | |
cca3974e | 5759 | int ata_host_suspend(struct ata_host *host, pm_message_t mesg) |
500530f6 TH |
5760 | { |
5761 | int i, j, rc; | |
5762 | ||
cca3974e | 5763 | rc = ata_host_request_pm(host, mesg, 0, ATA_EHI_QUIET, 1); |
500530f6 TH |
5764 | if (rc) |
5765 | goto fail; | |
5766 | ||
5767 | /* EH is quiescent now. Fail if we have any ready device. | |
5768 | * This happens if hotplug occurs between completion of device | |
5769 | * suspension and here. | |
5770 | */ | |
cca3974e JG |
5771 | for (i = 0; i < host->n_ports; i++) { |
5772 | struct ata_port *ap = host->ports[i]; | |
500530f6 TH |
5773 | |
5774 | for (j = 0; j < ATA_MAX_DEVICES; j++) { | |
5775 | struct ata_device *dev = &ap->device[j]; | |
5776 | ||
5777 | if (ata_dev_ready(dev)) { | |
5778 | ata_port_printk(ap, KERN_WARNING, | |
5779 | "suspend failed, device %d " | |
5780 | "still active\n", dev->devno); | |
5781 | rc = -EBUSY; | |
5782 | goto fail; | |
5783 | } | |
5784 | } | |
5785 | } | |
5786 | ||
cca3974e | 5787 | host->dev->power.power_state = mesg; |
500530f6 TH |
5788 | return 0; |
5789 | ||
5790 | fail: | |
cca3974e | 5791 | ata_host_resume(host); |
500530f6 TH |
5792 | return rc; |
5793 | } | |
5794 | ||
5795 | /** | |
cca3974e JG |
5796 | * ata_host_resume - resume host |
5797 | * @host: host to resume | |
500530f6 | 5798 | * |
cca3974e | 5799 | * Resume @host. Actual operation is performed by EH. This |
500530f6 TH |
5800 | * function requests EH to perform PM operations and returns. |
5801 | * Note that all resume operations are performed parallely. | |
5802 | * | |
5803 | * LOCKING: | |
5804 | * Kernel thread context (may sleep). | |
5805 | */ | |
cca3974e | 5806 | void ata_host_resume(struct ata_host *host) |
500530f6 | 5807 | { |
cca3974e JG |
5808 | ata_host_request_pm(host, PMSG_ON, ATA_EH_SOFTRESET, |
5809 | ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET, 0); | |
5810 | host->dev->power.power_state = PMSG_ON; | |
500530f6 | 5811 | } |
6ffa01d8 | 5812 | #endif |
500530f6 | 5813 | |
c893a3ae RD |
5814 | /** |
5815 | * ata_port_start - Set port up for dma. | |
5816 | * @ap: Port to initialize | |
5817 | * | |
5818 | * Called just after data structures for each port are | |
5819 | * initialized. Allocates space for PRD table. | |
5820 | * | |
5821 | * May be used as the port_start() entry in ata_port_operations. | |
5822 | * | |
5823 | * LOCKING: | |
5824 | * Inherited from caller. | |
5825 | */ | |
f0d36efd | 5826 | int ata_port_start(struct ata_port *ap) |
1da177e4 | 5827 | { |
2f1f610b | 5828 | struct device *dev = ap->dev; |
6037d6bb | 5829 | int rc; |
1da177e4 | 5830 | |
f0d36efd TH |
5831 | ap->prd = dmam_alloc_coherent(dev, ATA_PRD_TBL_SZ, &ap->prd_dma, |
5832 | GFP_KERNEL); | |
1da177e4 LT |
5833 | if (!ap->prd) |
5834 | return -ENOMEM; | |
5835 | ||
6037d6bb | 5836 | rc = ata_pad_alloc(ap, dev); |
f0d36efd | 5837 | if (rc) |
6037d6bb | 5838 | return rc; |
1da177e4 | 5839 | |
f0d36efd TH |
5840 | DPRINTK("prd alloc, virt %p, dma %llx\n", ap->prd, |
5841 | (unsigned long long)ap->prd_dma); | |
1da177e4 LT |
5842 | return 0; |
5843 | } | |
5844 | ||
3ef3b43d TH |
5845 | /** |
5846 | * ata_dev_init - Initialize an ata_device structure | |
5847 | * @dev: Device structure to initialize | |
5848 | * | |
5849 | * Initialize @dev in preparation for probing. | |
5850 | * | |
5851 | * LOCKING: | |
5852 | * Inherited from caller. | |
5853 | */ | |
5854 | void ata_dev_init(struct ata_device *dev) | |
5855 | { | |
5856 | struct ata_port *ap = dev->ap; | |
72fa4b74 TH |
5857 | unsigned long flags; |
5858 | ||
5a04bf4b TH |
5859 | /* SATA spd limit is bound to the first device */ |
5860 | ap->sata_spd_limit = ap->hw_sata_spd_limit; | |
5861 | ||
72fa4b74 TH |
5862 | /* High bits of dev->flags are used to record warm plug |
5863 | * requests which occur asynchronously. Synchronize using | |
cca3974e | 5864 | * host lock. |
72fa4b74 | 5865 | */ |
ba6a1308 | 5866 | spin_lock_irqsave(ap->lock, flags); |
72fa4b74 | 5867 | dev->flags &= ~ATA_DFLAG_INIT_MASK; |
ba6a1308 | 5868 | spin_unlock_irqrestore(ap->lock, flags); |
3ef3b43d | 5869 | |
72fa4b74 TH |
5870 | memset((void *)dev + ATA_DEVICE_CLEAR_OFFSET, 0, |
5871 | sizeof(*dev) - ATA_DEVICE_CLEAR_OFFSET); | |
3ef3b43d TH |
5872 | dev->pio_mask = UINT_MAX; |
5873 | dev->mwdma_mask = UINT_MAX; | |
5874 | dev->udma_mask = UINT_MAX; | |
5875 | } | |
5876 | ||
1da177e4 | 5877 | /** |
f3187195 TH |
5878 | * ata_port_alloc - allocate and initialize basic ATA port resources |
5879 | * @host: ATA host this allocated port belongs to | |
1da177e4 | 5880 | * |
f3187195 TH |
5881 | * Allocate and initialize basic ATA port resources. |
5882 | * | |
5883 | * RETURNS: | |
5884 | * Allocate ATA port on success, NULL on failure. | |
0cba632b | 5885 | * |
1da177e4 | 5886 | * LOCKING: |
f3187195 | 5887 | * Inherited from calling layer (may sleep). |
1da177e4 | 5888 | */ |
f3187195 | 5889 | struct ata_port *ata_port_alloc(struct ata_host *host) |
1da177e4 | 5890 | { |
f3187195 | 5891 | struct ata_port *ap; |
1da177e4 LT |
5892 | unsigned int i; |
5893 | ||
f3187195 TH |
5894 | DPRINTK("ENTER\n"); |
5895 | ||
5896 | ap = kzalloc(sizeof(*ap), GFP_KERNEL); | |
5897 | if (!ap) | |
5898 | return NULL; | |
5899 | ||
cca3974e | 5900 | ap->lock = &host->lock; |
198e0fed | 5901 | ap->flags = ATA_FLAG_DISABLED; |
f3187195 | 5902 | ap->print_id = -1; |
1da177e4 | 5903 | ap->ctl = ATA_DEVCTL_OBS; |
cca3974e | 5904 | ap->host = host; |
f3187195 TH |
5905 | ap->dev = host->dev; |
5906 | ||
5a04bf4b | 5907 | ap->hw_sata_spd_limit = UINT_MAX; |
1da177e4 LT |
5908 | ap->active_tag = ATA_TAG_POISON; |
5909 | ap->last_ctl = 0xFF; | |
bd5d825c BP |
5910 | |
5911 | #if defined(ATA_VERBOSE_DEBUG) | |
5912 | /* turn on all debugging levels */ | |
5913 | ap->msg_enable = 0x00FF; | |
5914 | #elif defined(ATA_DEBUG) | |
5915 | ap->msg_enable = ATA_MSG_DRV | ATA_MSG_INFO | ATA_MSG_CTL | ATA_MSG_WARN | ATA_MSG_ERR; | |
88574551 | 5916 | #else |
0dd4b21f | 5917 | ap->msg_enable = ATA_MSG_DRV | ATA_MSG_ERR | ATA_MSG_WARN; |
bd5d825c | 5918 | #endif |
1da177e4 | 5919 | |
65f27f38 DH |
5920 | INIT_DELAYED_WORK(&ap->port_task, NULL); |
5921 | INIT_DELAYED_WORK(&ap->hotplug_task, ata_scsi_hotplug); | |
5922 | INIT_WORK(&ap->scsi_rescan_task, ata_scsi_dev_rescan); | |
a72ec4ce | 5923 | INIT_LIST_HEAD(&ap->eh_done_q); |
c6cf9e99 | 5924 | init_waitqueue_head(&ap->eh_wait_q); |
1da177e4 | 5925 | |
838df628 | 5926 | ap->cbl = ATA_CBL_NONE; |
838df628 | 5927 | |
acf356b1 TH |
5928 | for (i = 0; i < ATA_MAX_DEVICES; i++) { |
5929 | struct ata_device *dev = &ap->device[i]; | |
38d87234 | 5930 | dev->ap = ap; |
72fa4b74 | 5931 | dev->devno = i; |
3ef3b43d | 5932 | ata_dev_init(dev); |
acf356b1 | 5933 | } |
1da177e4 LT |
5934 | |
5935 | #ifdef ATA_IRQ_TRAP | |
5936 | ap->stats.unhandled_irq = 1; | |
5937 | ap->stats.idle_irq = 1; | |
5938 | #endif | |
1da177e4 | 5939 | return ap; |
1da177e4 LT |
5940 | } |
5941 | ||
f0d36efd TH |
5942 | static void ata_host_release(struct device *gendev, void *res) |
5943 | { | |
5944 | struct ata_host *host = dev_get_drvdata(gendev); | |
5945 | int i; | |
5946 | ||
5947 | for (i = 0; i < host->n_ports; i++) { | |
5948 | struct ata_port *ap = host->ports[i]; | |
5949 | ||
ecef7253 TH |
5950 | if (!ap) |
5951 | continue; | |
5952 | ||
5953 | if ((host->flags & ATA_HOST_STARTED) && ap->ops->port_stop) | |
f0d36efd | 5954 | ap->ops->port_stop(ap); |
f0d36efd TH |
5955 | } |
5956 | ||
ecef7253 | 5957 | if ((host->flags & ATA_HOST_STARTED) && host->ops->host_stop) |
f0d36efd | 5958 | host->ops->host_stop(host); |
1aa56cca | 5959 | |
1aa506e4 TH |
5960 | for (i = 0; i < host->n_ports; i++) { |
5961 | struct ata_port *ap = host->ports[i]; | |
5962 | ||
4911487a TH |
5963 | if (!ap) |
5964 | continue; | |
5965 | ||
5966 | if (ap->scsi_host) | |
1aa506e4 TH |
5967 | scsi_host_put(ap->scsi_host); |
5968 | ||
4911487a | 5969 | kfree(ap); |
1aa506e4 TH |
5970 | host->ports[i] = NULL; |
5971 | } | |
5972 | ||
1aa56cca | 5973 | dev_set_drvdata(gendev, NULL); |
f0d36efd TH |
5974 | } |
5975 | ||
f3187195 TH |
5976 | /** |
5977 | * ata_host_alloc - allocate and init basic ATA host resources | |
5978 | * @dev: generic device this host is associated with | |
5979 | * @max_ports: maximum number of ATA ports associated with this host | |
5980 | * | |
5981 | * Allocate and initialize basic ATA host resources. LLD calls | |
5982 | * this function to allocate a host, initializes it fully and | |
5983 | * attaches it using ata_host_register(). | |
5984 | * | |
5985 | * @max_ports ports are allocated and host->n_ports is | |
5986 | * initialized to @max_ports. The caller is allowed to decrease | |
5987 | * host->n_ports before calling ata_host_register(). The unused | |
5988 | * ports will be automatically freed on registration. | |
5989 | * | |
5990 | * RETURNS: | |
5991 | * Allocate ATA host on success, NULL on failure. | |
5992 | * | |
5993 | * LOCKING: | |
5994 | * Inherited from calling layer (may sleep). | |
5995 | */ | |
5996 | struct ata_host *ata_host_alloc(struct device *dev, int max_ports) | |
5997 | { | |
5998 | struct ata_host *host; | |
5999 | size_t sz; | |
6000 | int i; | |
6001 | ||
6002 | DPRINTK("ENTER\n"); | |
6003 | ||
6004 | if (!devres_open_group(dev, NULL, GFP_KERNEL)) | |
6005 | return NULL; | |
6006 | ||
6007 | /* alloc a container for our list of ATA ports (buses) */ | |
6008 | sz = sizeof(struct ata_host) + (max_ports + 1) * sizeof(void *); | |
6009 | /* alloc a container for our list of ATA ports (buses) */ | |
6010 | host = devres_alloc(ata_host_release, sz, GFP_KERNEL); | |
6011 | if (!host) | |
6012 | goto err_out; | |
6013 | ||
6014 | devres_add(dev, host); | |
6015 | dev_set_drvdata(dev, host); | |
6016 | ||
6017 | spin_lock_init(&host->lock); | |
6018 | host->dev = dev; | |
6019 | host->n_ports = max_ports; | |
6020 | ||
6021 | /* allocate ports bound to this host */ | |
6022 | for (i = 0; i < max_ports; i++) { | |
6023 | struct ata_port *ap; | |
6024 | ||
6025 | ap = ata_port_alloc(host); | |
6026 | if (!ap) | |
6027 | goto err_out; | |
6028 | ||
6029 | ap->port_no = i; | |
6030 | host->ports[i] = ap; | |
6031 | } | |
6032 | ||
6033 | devres_remove_group(dev, NULL); | |
6034 | return host; | |
6035 | ||
6036 | err_out: | |
6037 | devres_release_group(dev, NULL); | |
6038 | return NULL; | |
6039 | } | |
6040 | ||
f5cda257 TH |
6041 | /** |
6042 | * ata_host_alloc_pinfo - alloc host and init with port_info array | |
6043 | * @dev: generic device this host is associated with | |
6044 | * @ppi: array of ATA port_info to initialize host with | |
6045 | * @n_ports: number of ATA ports attached to this host | |
6046 | * | |
6047 | * Allocate ATA host and initialize with info from @ppi. If NULL | |
6048 | * terminated, @ppi may contain fewer entries than @n_ports. The | |
6049 | * last entry will be used for the remaining ports. | |
6050 | * | |
6051 | * RETURNS: | |
6052 | * Allocate ATA host on success, NULL on failure. | |
6053 | * | |
6054 | * LOCKING: | |
6055 | * Inherited from calling layer (may sleep). | |
6056 | */ | |
6057 | struct ata_host *ata_host_alloc_pinfo(struct device *dev, | |
6058 | const struct ata_port_info * const * ppi, | |
6059 | int n_ports) | |
6060 | { | |
6061 | const struct ata_port_info *pi; | |
6062 | struct ata_host *host; | |
6063 | int i, j; | |
6064 | ||
6065 | host = ata_host_alloc(dev, n_ports); | |
6066 | if (!host) | |
6067 | return NULL; | |
6068 | ||
6069 | for (i = 0, j = 0, pi = NULL; i < host->n_ports; i++) { | |
6070 | struct ata_port *ap = host->ports[i]; | |
6071 | ||
6072 | if (ppi[j]) | |
6073 | pi = ppi[j++]; | |
6074 | ||
6075 | ap->pio_mask = pi->pio_mask; | |
6076 | ap->mwdma_mask = pi->mwdma_mask; | |
6077 | ap->udma_mask = pi->udma_mask; | |
6078 | ap->flags |= pi->flags; | |
6079 | ap->ops = pi->port_ops; | |
6080 | ||
6081 | if (!host->ops && (pi->port_ops != &ata_dummy_port_ops)) | |
6082 | host->ops = pi->port_ops; | |
6083 | if (!host->private_data && pi->private_data) | |
6084 | host->private_data = pi->private_data; | |
6085 | } | |
6086 | ||
6087 | return host; | |
6088 | } | |
6089 | ||
ecef7253 TH |
6090 | /** |
6091 | * ata_host_start - start and freeze ports of an ATA host | |
6092 | * @host: ATA host to start ports for | |
6093 | * | |
6094 | * Start and then freeze ports of @host. Started status is | |
6095 | * recorded in host->flags, so this function can be called | |
6096 | * multiple times. Ports are guaranteed to get started only | |
f3187195 TH |
6097 | * once. If host->ops isn't initialized yet, its set to the |
6098 | * first non-dummy port ops. | |
ecef7253 TH |
6099 | * |
6100 | * LOCKING: | |
6101 | * Inherited from calling layer (may sleep). | |
6102 | * | |
6103 | * RETURNS: | |
6104 | * 0 if all ports are started successfully, -errno otherwise. | |
6105 | */ | |
6106 | int ata_host_start(struct ata_host *host) | |
6107 | { | |
6108 | int i, rc; | |
6109 | ||
6110 | if (host->flags & ATA_HOST_STARTED) | |
6111 | return 0; | |
6112 | ||
6113 | for (i = 0; i < host->n_ports; i++) { | |
6114 | struct ata_port *ap = host->ports[i]; | |
6115 | ||
f3187195 TH |
6116 | if (!host->ops && !ata_port_is_dummy(ap)) |
6117 | host->ops = ap->ops; | |
6118 | ||
ecef7253 TH |
6119 | if (ap->ops->port_start) { |
6120 | rc = ap->ops->port_start(ap); | |
6121 | if (rc) { | |
6122 | ata_port_printk(ap, KERN_ERR, "failed to " | |
6123 | "start port (errno=%d)\n", rc); | |
6124 | goto err_out; | |
6125 | } | |
6126 | } | |
6127 | ||
6128 | ata_eh_freeze_port(ap); | |
6129 | } | |
6130 | ||
6131 | host->flags |= ATA_HOST_STARTED; | |
6132 | return 0; | |
6133 | ||
6134 | err_out: | |
6135 | while (--i >= 0) { | |
6136 | struct ata_port *ap = host->ports[i]; | |
6137 | ||
6138 | if (ap->ops->port_stop) | |
6139 | ap->ops->port_stop(ap); | |
6140 | } | |
6141 | return rc; | |
6142 | } | |
6143 | ||
b03732f0 | 6144 | /** |
cca3974e JG |
6145 | * ata_sas_host_init - Initialize a host struct |
6146 | * @host: host to initialize | |
6147 | * @dev: device host is attached to | |
6148 | * @flags: host flags | |
6149 | * @ops: port_ops | |
b03732f0 BK |
6150 | * |
6151 | * LOCKING: | |
6152 | * PCI/etc. bus probe sem. | |
6153 | * | |
6154 | */ | |
f3187195 | 6155 | /* KILLME - the only user left is ipr */ |
cca3974e JG |
6156 | void ata_host_init(struct ata_host *host, struct device *dev, |
6157 | unsigned long flags, const struct ata_port_operations *ops) | |
b03732f0 | 6158 | { |
cca3974e JG |
6159 | spin_lock_init(&host->lock); |
6160 | host->dev = dev; | |
6161 | host->flags = flags; | |
6162 | host->ops = ops; | |
b03732f0 BK |
6163 | } |
6164 | ||
f3187195 TH |
6165 | /** |
6166 | * ata_host_register - register initialized ATA host | |
6167 | * @host: ATA host to register | |
6168 | * @sht: template for SCSI host | |
6169 | * | |
6170 | * Register initialized ATA host. @host is allocated using | |
6171 | * ata_host_alloc() and fully initialized by LLD. This function | |
6172 | * starts ports, registers @host with ATA and SCSI layers and | |
6173 | * probe registered devices. | |
6174 | * | |
6175 | * LOCKING: | |
6176 | * Inherited from calling layer (may sleep). | |
6177 | * | |
6178 | * RETURNS: | |
6179 | * 0 on success, -errno otherwise. | |
6180 | */ | |
6181 | int ata_host_register(struct ata_host *host, struct scsi_host_template *sht) | |
6182 | { | |
6183 | int i, rc; | |
6184 | ||
6185 | /* host must have been started */ | |
6186 | if (!(host->flags & ATA_HOST_STARTED)) { | |
6187 | dev_printk(KERN_ERR, host->dev, | |
6188 | "BUG: trying to register unstarted host\n"); | |
6189 | WARN_ON(1); | |
6190 | return -EINVAL; | |
6191 | } | |
6192 | ||
6193 | /* Blow away unused ports. This happens when LLD can't | |
6194 | * determine the exact number of ports to allocate at | |
6195 | * allocation time. | |
6196 | */ | |
6197 | for (i = host->n_ports; host->ports[i]; i++) | |
6198 | kfree(host->ports[i]); | |
6199 | ||
6200 | /* give ports names and add SCSI hosts */ | |
6201 | for (i = 0; i < host->n_ports; i++) | |
6202 | host->ports[i]->print_id = ata_print_id++; | |
6203 | ||
6204 | rc = ata_scsi_add_hosts(host, sht); | |
6205 | if (rc) | |
6206 | return rc; | |
6207 | ||
6208 | /* set cable, sata_spd_limit and report */ | |
6209 | for (i = 0; i < host->n_ports; i++) { | |
6210 | struct ata_port *ap = host->ports[i]; | |
6211 | int irq_line; | |
6212 | u32 scontrol; | |
6213 | unsigned long xfer_mask; | |
6214 | ||
6215 | /* set SATA cable type if still unset */ | |
6216 | if (ap->cbl == ATA_CBL_NONE && (ap->flags & ATA_FLAG_SATA)) | |
6217 | ap->cbl = ATA_CBL_SATA; | |
6218 | ||
6219 | /* init sata_spd_limit to the current value */ | |
6220 | if (sata_scr_read(ap, SCR_CONTROL, &scontrol) == 0) { | |
6221 | int spd = (scontrol >> 4) & 0xf; | |
6222 | ap->hw_sata_spd_limit &= (1 << spd) - 1; | |
6223 | } | |
6224 | ap->sata_spd_limit = ap->hw_sata_spd_limit; | |
6225 | ||
6226 | /* report the secondary IRQ for second channel legacy */ | |
6227 | irq_line = host->irq; | |
6228 | if (i == 1 && host->irq2) | |
6229 | irq_line = host->irq2; | |
6230 | ||
6231 | xfer_mask = ata_pack_xfermask(ap->pio_mask, ap->mwdma_mask, | |
6232 | ap->udma_mask); | |
6233 | ||
6234 | /* print per-port info to dmesg */ | |
6235 | if (!ata_port_is_dummy(ap)) | |
6236 | ata_port_printk(ap, KERN_INFO, "%cATA max %s cmd 0x%p " | |
6237 | "ctl 0x%p bmdma 0x%p irq %d\n", | |
6238 | ap->cbl == ATA_CBL_SATA ? 'S' : 'P', | |
6239 | ata_mode_string(xfer_mask), | |
6240 | ap->ioaddr.cmd_addr, | |
6241 | ap->ioaddr.ctl_addr, | |
6242 | ap->ioaddr.bmdma_addr, | |
6243 | irq_line); | |
6244 | else | |
6245 | ata_port_printk(ap, KERN_INFO, "DUMMY\n"); | |
6246 | } | |
6247 | ||
6248 | /* perform each probe synchronously */ | |
6249 | DPRINTK("probe begin\n"); | |
6250 | for (i = 0; i < host->n_ports; i++) { | |
6251 | struct ata_port *ap = host->ports[i]; | |
6252 | int rc; | |
6253 | ||
6254 | /* probe */ | |
6255 | if (ap->ops->error_handler) { | |
6256 | struct ata_eh_info *ehi = &ap->eh_info; | |
6257 | unsigned long flags; | |
6258 | ||
6259 | ata_port_probe(ap); | |
6260 | ||
6261 | /* kick EH for boot probing */ | |
6262 | spin_lock_irqsave(ap->lock, flags); | |
6263 | ||
6264 | ehi->probe_mask = (1 << ATA_MAX_DEVICES) - 1; | |
6265 | ehi->action |= ATA_EH_SOFTRESET; | |
6266 | ehi->flags |= ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET; | |
6267 | ||
6268 | ap->pflags |= ATA_PFLAG_LOADING; | |
6269 | ata_port_schedule_eh(ap); | |
6270 | ||
6271 | spin_unlock_irqrestore(ap->lock, flags); | |
6272 | ||
6273 | /* wait for EH to finish */ | |
6274 | ata_port_wait_eh(ap); | |
6275 | } else { | |
6276 | DPRINTK("ata%u: bus probe begin\n", ap->print_id); | |
6277 | rc = ata_bus_probe(ap); | |
6278 | DPRINTK("ata%u: bus probe end\n", ap->print_id); | |
6279 | ||
6280 | if (rc) { | |
6281 | /* FIXME: do something useful here? | |
6282 | * Current libata behavior will | |
6283 | * tear down everything when | |
6284 | * the module is removed | |
6285 | * or the h/w is unplugged. | |
6286 | */ | |
6287 | } | |
6288 | } | |
6289 | } | |
6290 | ||
6291 | /* probes are done, now scan each port's disk(s) */ | |
6292 | DPRINTK("host probe begin\n"); | |
6293 | for (i = 0; i < host->n_ports; i++) { | |
6294 | struct ata_port *ap = host->ports[i]; | |
6295 | ||
6296 | ata_scsi_scan_host(ap); | |
6297 | } | |
6298 | ||
6299 | return 0; | |
6300 | } | |
6301 | ||
f5cda257 TH |
6302 | /** |
6303 | * ata_host_activate - start host, request IRQ and register it | |
6304 | * @host: target ATA host | |
6305 | * @irq: IRQ to request | |
6306 | * @irq_handler: irq_handler used when requesting IRQ | |
6307 | * @irq_flags: irq_flags used when requesting IRQ | |
6308 | * @sht: scsi_host_template to use when registering the host | |
6309 | * | |
6310 | * After allocating an ATA host and initializing it, most libata | |
6311 | * LLDs perform three steps to activate the host - start host, | |
6312 | * request IRQ and register it. This helper takes necessasry | |
6313 | * arguments and performs the three steps in one go. | |
6314 | * | |
6315 | * LOCKING: | |
6316 | * Inherited from calling layer (may sleep). | |
6317 | * | |
6318 | * RETURNS: | |
6319 | * 0 on success, -errno otherwise. | |
6320 | */ | |
6321 | int ata_host_activate(struct ata_host *host, int irq, | |
6322 | irq_handler_t irq_handler, unsigned long irq_flags, | |
6323 | struct scsi_host_template *sht) | |
6324 | { | |
6325 | int rc; | |
6326 | ||
6327 | rc = ata_host_start(host); | |
6328 | if (rc) | |
6329 | return rc; | |
6330 | ||
6331 | rc = devm_request_irq(host->dev, irq, irq_handler, irq_flags, | |
6332 | dev_driver_string(host->dev), host); | |
6333 | if (rc) | |
6334 | return rc; | |
6335 | ||
6336 | rc = ata_host_register(host, sht); | |
6337 | /* if failed, just free the IRQ and leave ports alone */ | |
6338 | if (rc) | |
6339 | devm_free_irq(host->dev, irq, host); | |
6340 | ||
6341 | return rc; | |
6342 | } | |
6343 | ||
720ba126 TH |
6344 | /** |
6345 | * ata_port_detach - Detach ATA port in prepration of device removal | |
6346 | * @ap: ATA port to be detached | |
6347 | * | |
6348 | * Detach all ATA devices and the associated SCSI devices of @ap; | |
6349 | * then, remove the associated SCSI host. @ap is guaranteed to | |
6350 | * be quiescent on return from this function. | |
6351 | * | |
6352 | * LOCKING: | |
6353 | * Kernel thread context (may sleep). | |
6354 | */ | |
6355 | void ata_port_detach(struct ata_port *ap) | |
6356 | { | |
6357 | unsigned long flags; | |
6358 | int i; | |
6359 | ||
6360 | if (!ap->ops->error_handler) | |
c3cf30a9 | 6361 | goto skip_eh; |
720ba126 TH |
6362 | |
6363 | /* tell EH we're leaving & flush EH */ | |
ba6a1308 | 6364 | spin_lock_irqsave(ap->lock, flags); |
b51e9e5d | 6365 | ap->pflags |= ATA_PFLAG_UNLOADING; |
ba6a1308 | 6366 | spin_unlock_irqrestore(ap->lock, flags); |
720ba126 TH |
6367 | |
6368 | ata_port_wait_eh(ap); | |
6369 | ||
6370 | /* EH is now guaranteed to see UNLOADING, so no new device | |
6371 | * will be attached. Disable all existing devices. | |
6372 | */ | |
ba6a1308 | 6373 | spin_lock_irqsave(ap->lock, flags); |
720ba126 TH |
6374 | |
6375 | for (i = 0; i < ATA_MAX_DEVICES; i++) | |
6376 | ata_dev_disable(&ap->device[i]); | |
6377 | ||
ba6a1308 | 6378 | spin_unlock_irqrestore(ap->lock, flags); |
720ba126 TH |
6379 | |
6380 | /* Final freeze & EH. All in-flight commands are aborted. EH | |
6381 | * will be skipped and retrials will be terminated with bad | |
6382 | * target. | |
6383 | */ | |
ba6a1308 | 6384 | spin_lock_irqsave(ap->lock, flags); |
720ba126 | 6385 | ata_port_freeze(ap); /* won't be thawed */ |
ba6a1308 | 6386 | spin_unlock_irqrestore(ap->lock, flags); |
720ba126 TH |
6387 | |
6388 | ata_port_wait_eh(ap); | |
6389 | ||
6390 | /* Flush hotplug task. The sequence is similar to | |
6391 | * ata_port_flush_task(). | |
6392 | */ | |
6393 | flush_workqueue(ata_aux_wq); | |
6394 | cancel_delayed_work(&ap->hotplug_task); | |
6395 | flush_workqueue(ata_aux_wq); | |
6396 | ||
c3cf30a9 | 6397 | skip_eh: |
720ba126 | 6398 | /* remove the associated SCSI host */ |
cca3974e | 6399 | scsi_remove_host(ap->scsi_host); |
720ba126 TH |
6400 | } |
6401 | ||
0529c159 TH |
6402 | /** |
6403 | * ata_host_detach - Detach all ports of an ATA host | |
6404 | * @host: Host to detach | |
6405 | * | |
6406 | * Detach all ports of @host. | |
6407 | * | |
6408 | * LOCKING: | |
6409 | * Kernel thread context (may sleep). | |
6410 | */ | |
6411 | void ata_host_detach(struct ata_host *host) | |
6412 | { | |
6413 | int i; | |
6414 | ||
6415 | for (i = 0; i < host->n_ports; i++) | |
6416 | ata_port_detach(host->ports[i]); | |
6417 | } | |
6418 | ||
1da177e4 LT |
6419 | /** |
6420 | * ata_std_ports - initialize ioaddr with standard port offsets. | |
6421 | * @ioaddr: IO address structure to be initialized | |
0baab86b EF |
6422 | * |
6423 | * Utility function which initializes data_addr, error_addr, | |
6424 | * feature_addr, nsect_addr, lbal_addr, lbam_addr, lbah_addr, | |
6425 | * device_addr, status_addr, and command_addr to standard offsets | |
6426 | * relative to cmd_addr. | |
6427 | * | |
6428 | * Does not set ctl_addr, altstatus_addr, bmdma_addr, or scr_addr. | |
1da177e4 | 6429 | */ |
0baab86b | 6430 | |
1da177e4 LT |
6431 | void ata_std_ports(struct ata_ioports *ioaddr) |
6432 | { | |
6433 | ioaddr->data_addr = ioaddr->cmd_addr + ATA_REG_DATA; | |
6434 | ioaddr->error_addr = ioaddr->cmd_addr + ATA_REG_ERR; | |
6435 | ioaddr->feature_addr = ioaddr->cmd_addr + ATA_REG_FEATURE; | |
6436 | ioaddr->nsect_addr = ioaddr->cmd_addr + ATA_REG_NSECT; | |
6437 | ioaddr->lbal_addr = ioaddr->cmd_addr + ATA_REG_LBAL; | |
6438 | ioaddr->lbam_addr = ioaddr->cmd_addr + ATA_REG_LBAM; | |
6439 | ioaddr->lbah_addr = ioaddr->cmd_addr + ATA_REG_LBAH; | |
6440 | ioaddr->device_addr = ioaddr->cmd_addr + ATA_REG_DEVICE; | |
6441 | ioaddr->status_addr = ioaddr->cmd_addr + ATA_REG_STATUS; | |
6442 | ioaddr->command_addr = ioaddr->cmd_addr + ATA_REG_CMD; | |
6443 | } | |
6444 | ||
0baab86b | 6445 | |
374b1873 JG |
6446 | #ifdef CONFIG_PCI |
6447 | ||
1da177e4 LT |
6448 | /** |
6449 | * ata_pci_remove_one - PCI layer callback for device removal | |
6450 | * @pdev: PCI device that was removed | |
6451 | * | |
b878ca5d TH |
6452 | * PCI layer indicates to libata via this hook that hot-unplug or |
6453 | * module unload event has occurred. Detach all ports. Resource | |
6454 | * release is handled via devres. | |
1da177e4 LT |
6455 | * |
6456 | * LOCKING: | |
6457 | * Inherited from PCI layer (may sleep). | |
6458 | */ | |
f0d36efd | 6459 | void ata_pci_remove_one(struct pci_dev *pdev) |
1da177e4 LT |
6460 | { |
6461 | struct device *dev = pci_dev_to_dev(pdev); | |
cca3974e | 6462 | struct ata_host *host = dev_get_drvdata(dev); |
1da177e4 | 6463 | |
b878ca5d | 6464 | ata_host_detach(host); |
1da177e4 LT |
6465 | } |
6466 | ||
6467 | /* move to PCI subsystem */ | |
057ace5e | 6468 | int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits) |
1da177e4 LT |
6469 | { |
6470 | unsigned long tmp = 0; | |
6471 | ||
6472 | switch (bits->width) { | |
6473 | case 1: { | |
6474 | u8 tmp8 = 0; | |
6475 | pci_read_config_byte(pdev, bits->reg, &tmp8); | |
6476 | tmp = tmp8; | |
6477 | break; | |
6478 | } | |
6479 | case 2: { | |
6480 | u16 tmp16 = 0; | |
6481 | pci_read_config_word(pdev, bits->reg, &tmp16); | |
6482 | tmp = tmp16; | |
6483 | break; | |
6484 | } | |
6485 | case 4: { | |
6486 | u32 tmp32 = 0; | |
6487 | pci_read_config_dword(pdev, bits->reg, &tmp32); | |
6488 | tmp = tmp32; | |
6489 | break; | |
6490 | } | |
6491 | ||
6492 | default: | |
6493 | return -EINVAL; | |
6494 | } | |
6495 | ||
6496 | tmp &= bits->mask; | |
6497 | ||
6498 | return (tmp == bits->val) ? 1 : 0; | |
6499 | } | |
9b847548 | 6500 | |
6ffa01d8 | 6501 | #ifdef CONFIG_PM |
3c5100c1 | 6502 | void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg) |
9b847548 JA |
6503 | { |
6504 | pci_save_state(pdev); | |
4c90d971 | 6505 | pci_disable_device(pdev); |
500530f6 | 6506 | |
4c90d971 | 6507 | if (mesg.event == PM_EVENT_SUSPEND) |
500530f6 | 6508 | pci_set_power_state(pdev, PCI_D3hot); |
9b847548 JA |
6509 | } |
6510 | ||
553c4aa6 | 6511 | int ata_pci_device_do_resume(struct pci_dev *pdev) |
9b847548 | 6512 | { |
553c4aa6 TH |
6513 | int rc; |
6514 | ||
9b847548 JA |
6515 | pci_set_power_state(pdev, PCI_D0); |
6516 | pci_restore_state(pdev); | |
553c4aa6 | 6517 | |
b878ca5d | 6518 | rc = pcim_enable_device(pdev); |
553c4aa6 TH |
6519 | if (rc) { |
6520 | dev_printk(KERN_ERR, &pdev->dev, | |
6521 | "failed to enable device after resume (%d)\n", rc); | |
6522 | return rc; | |
6523 | } | |
6524 | ||
9b847548 | 6525 | pci_set_master(pdev); |
553c4aa6 | 6526 | return 0; |
500530f6 TH |
6527 | } |
6528 | ||
3c5100c1 | 6529 | int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg) |
500530f6 | 6530 | { |
cca3974e | 6531 | struct ata_host *host = dev_get_drvdata(&pdev->dev); |
500530f6 TH |
6532 | int rc = 0; |
6533 | ||
cca3974e | 6534 | rc = ata_host_suspend(host, mesg); |
500530f6 TH |
6535 | if (rc) |
6536 | return rc; | |
6537 | ||
3c5100c1 | 6538 | ata_pci_device_do_suspend(pdev, mesg); |
500530f6 TH |
6539 | |
6540 | return 0; | |
6541 | } | |
6542 | ||
6543 | int ata_pci_device_resume(struct pci_dev *pdev) | |
6544 | { | |
cca3974e | 6545 | struct ata_host *host = dev_get_drvdata(&pdev->dev); |
553c4aa6 | 6546 | int rc; |
500530f6 | 6547 | |
553c4aa6 TH |
6548 | rc = ata_pci_device_do_resume(pdev); |
6549 | if (rc == 0) | |
6550 | ata_host_resume(host); | |
6551 | return rc; | |
9b847548 | 6552 | } |
6ffa01d8 TH |
6553 | #endif /* CONFIG_PM */ |
6554 | ||
1da177e4 LT |
6555 | #endif /* CONFIG_PCI */ |
6556 | ||
6557 | ||
1da177e4 LT |
6558 | static int __init ata_init(void) |
6559 | { | |
a8601e5f | 6560 | ata_probe_timeout *= HZ; |
1da177e4 LT |
6561 | ata_wq = create_workqueue("ata"); |
6562 | if (!ata_wq) | |
6563 | return -ENOMEM; | |
6564 | ||
453b07ac TH |
6565 | ata_aux_wq = create_singlethread_workqueue("ata_aux"); |
6566 | if (!ata_aux_wq) { | |
6567 | destroy_workqueue(ata_wq); | |
6568 | return -ENOMEM; | |
6569 | } | |
6570 | ||
1da177e4 LT |
6571 | printk(KERN_DEBUG "libata version " DRV_VERSION " loaded.\n"); |
6572 | return 0; | |
6573 | } | |
6574 | ||
6575 | static void __exit ata_exit(void) | |
6576 | { | |
6577 | destroy_workqueue(ata_wq); | |
453b07ac | 6578 | destroy_workqueue(ata_aux_wq); |
1da177e4 LT |
6579 | } |
6580 | ||
a4625085 | 6581 | subsys_initcall(ata_init); |
1da177e4 LT |
6582 | module_exit(ata_exit); |
6583 | ||
67846b30 | 6584 | static unsigned long ratelimit_time; |
34af946a | 6585 | static DEFINE_SPINLOCK(ata_ratelimit_lock); |
67846b30 JG |
6586 | |
6587 | int ata_ratelimit(void) | |
6588 | { | |
6589 | int rc; | |
6590 | unsigned long flags; | |
6591 | ||
6592 | spin_lock_irqsave(&ata_ratelimit_lock, flags); | |
6593 | ||
6594 | if (time_after(jiffies, ratelimit_time)) { | |
6595 | rc = 1; | |
6596 | ratelimit_time = jiffies + (HZ/5); | |
6597 | } else | |
6598 | rc = 0; | |
6599 | ||
6600 | spin_unlock_irqrestore(&ata_ratelimit_lock, flags); | |
6601 | ||
6602 | return rc; | |
6603 | } | |
6604 | ||
c22daff4 TH |
6605 | /** |
6606 | * ata_wait_register - wait until register value changes | |
6607 | * @reg: IO-mapped register | |
6608 | * @mask: Mask to apply to read register value | |
6609 | * @val: Wait condition | |
6610 | * @interval_msec: polling interval in milliseconds | |
6611 | * @timeout_msec: timeout in milliseconds | |
6612 | * | |
6613 | * Waiting for some bits of register to change is a common | |
6614 | * operation for ATA controllers. This function reads 32bit LE | |
6615 | * IO-mapped register @reg and tests for the following condition. | |
6616 | * | |
6617 | * (*@reg & mask) != val | |
6618 | * | |
6619 | * If the condition is met, it returns; otherwise, the process is | |
6620 | * repeated after @interval_msec until timeout. | |
6621 | * | |
6622 | * LOCKING: | |
6623 | * Kernel thread context (may sleep) | |
6624 | * | |
6625 | * RETURNS: | |
6626 | * The final register value. | |
6627 | */ | |
6628 | u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val, | |
6629 | unsigned long interval_msec, | |
6630 | unsigned long timeout_msec) | |
6631 | { | |
6632 | unsigned long timeout; | |
6633 | u32 tmp; | |
6634 | ||
6635 | tmp = ioread32(reg); | |
6636 | ||
6637 | /* Calculate timeout _after_ the first read to make sure | |
6638 | * preceding writes reach the controller before starting to | |
6639 | * eat away the timeout. | |
6640 | */ | |
6641 | timeout = jiffies + (timeout_msec * HZ) / 1000; | |
6642 | ||
6643 | while ((tmp & mask) == val && time_before(jiffies, timeout)) { | |
6644 | msleep(interval_msec); | |
6645 | tmp = ioread32(reg); | |
6646 | } | |
6647 | ||
6648 | return tmp; | |
6649 | } | |
6650 | ||
dd5b06c4 TH |
6651 | /* |
6652 | * Dummy port_ops | |
6653 | */ | |
6654 | static void ata_dummy_noret(struct ata_port *ap) { } | |
6655 | static int ata_dummy_ret0(struct ata_port *ap) { return 0; } | |
6656 | static void ata_dummy_qc_noret(struct ata_queued_cmd *qc) { } | |
6657 | ||
6658 | static u8 ata_dummy_check_status(struct ata_port *ap) | |
6659 | { | |
6660 | return ATA_DRDY; | |
6661 | } | |
6662 | ||
6663 | static unsigned int ata_dummy_qc_issue(struct ata_queued_cmd *qc) | |
6664 | { | |
6665 | return AC_ERR_SYSTEM; | |
6666 | } | |
6667 | ||
6668 | const struct ata_port_operations ata_dummy_port_ops = { | |
6669 | .port_disable = ata_port_disable, | |
6670 | .check_status = ata_dummy_check_status, | |
6671 | .check_altstatus = ata_dummy_check_status, | |
6672 | .dev_select = ata_noop_dev_select, | |
6673 | .qc_prep = ata_noop_qc_prep, | |
6674 | .qc_issue = ata_dummy_qc_issue, | |
6675 | .freeze = ata_dummy_noret, | |
6676 | .thaw = ata_dummy_noret, | |
6677 | .error_handler = ata_dummy_noret, | |
6678 | .post_internal_cmd = ata_dummy_qc_noret, | |
6679 | .irq_clear = ata_dummy_noret, | |
6680 | .port_start = ata_dummy_ret0, | |
6681 | .port_stop = ata_dummy_noret, | |
6682 | }; | |
6683 | ||
21b0ad4f TH |
6684 | const struct ata_port_info ata_dummy_port_info = { |
6685 | .port_ops = &ata_dummy_port_ops, | |
6686 | }; | |
6687 | ||
1da177e4 LT |
6688 | /* |
6689 | * libata is essentially a library of internal helper functions for | |
6690 | * low-level ATA host controller drivers. As such, the API/ABI is | |
6691 | * likely to change as new drivers are added and updated. | |
6692 | * Do not depend on ABI/API stability. | |
6693 | */ | |
6694 | ||
e9c83914 TH |
6695 | EXPORT_SYMBOL_GPL(sata_deb_timing_normal); |
6696 | EXPORT_SYMBOL_GPL(sata_deb_timing_hotplug); | |
6697 | EXPORT_SYMBOL_GPL(sata_deb_timing_long); | |
dd5b06c4 | 6698 | EXPORT_SYMBOL_GPL(ata_dummy_port_ops); |
21b0ad4f | 6699 | EXPORT_SYMBOL_GPL(ata_dummy_port_info); |
1da177e4 LT |
6700 | EXPORT_SYMBOL_GPL(ata_std_bios_param); |
6701 | EXPORT_SYMBOL_GPL(ata_std_ports); | |
cca3974e | 6702 | EXPORT_SYMBOL_GPL(ata_host_init); |
f3187195 | 6703 | EXPORT_SYMBOL_GPL(ata_host_alloc); |
f5cda257 | 6704 | EXPORT_SYMBOL_GPL(ata_host_alloc_pinfo); |
ecef7253 | 6705 | EXPORT_SYMBOL_GPL(ata_host_start); |
f3187195 | 6706 | EXPORT_SYMBOL_GPL(ata_host_register); |
f5cda257 | 6707 | EXPORT_SYMBOL_GPL(ata_host_activate); |
0529c159 | 6708 | EXPORT_SYMBOL_GPL(ata_host_detach); |
1da177e4 LT |
6709 | EXPORT_SYMBOL_GPL(ata_sg_init); |
6710 | EXPORT_SYMBOL_GPL(ata_sg_init_one); | |
9a1004d0 | 6711 | EXPORT_SYMBOL_GPL(ata_hsm_move); |
f686bcb8 | 6712 | EXPORT_SYMBOL_GPL(ata_qc_complete); |
dedaf2b0 | 6713 | EXPORT_SYMBOL_GPL(ata_qc_complete_multiple); |
1da177e4 | 6714 | EXPORT_SYMBOL_GPL(ata_qc_issue_prot); |
1da177e4 LT |
6715 | EXPORT_SYMBOL_GPL(ata_tf_load); |
6716 | EXPORT_SYMBOL_GPL(ata_tf_read); | |
6717 | EXPORT_SYMBOL_GPL(ata_noop_dev_select); | |
6718 | EXPORT_SYMBOL_GPL(ata_std_dev_select); | |
43727fbc | 6719 | EXPORT_SYMBOL_GPL(sata_print_link_status); |
1da177e4 LT |
6720 | EXPORT_SYMBOL_GPL(ata_tf_to_fis); |
6721 | EXPORT_SYMBOL_GPL(ata_tf_from_fis); | |
6722 | EXPORT_SYMBOL_GPL(ata_check_status); | |
6723 | EXPORT_SYMBOL_GPL(ata_altstatus); | |
1da177e4 LT |
6724 | EXPORT_SYMBOL_GPL(ata_exec_command); |
6725 | EXPORT_SYMBOL_GPL(ata_port_start); | |
1da177e4 | 6726 | EXPORT_SYMBOL_GPL(ata_interrupt); |
04351821 | 6727 | EXPORT_SYMBOL_GPL(ata_do_set_mode); |
0d5ff566 TH |
6728 | EXPORT_SYMBOL_GPL(ata_data_xfer); |
6729 | EXPORT_SYMBOL_GPL(ata_data_xfer_noirq); | |
1da177e4 | 6730 | EXPORT_SYMBOL_GPL(ata_qc_prep); |
e46834cd | 6731 | EXPORT_SYMBOL_GPL(ata_noop_qc_prep); |
1da177e4 LT |
6732 | EXPORT_SYMBOL_GPL(ata_bmdma_setup); |
6733 | EXPORT_SYMBOL_GPL(ata_bmdma_start); | |
6734 | EXPORT_SYMBOL_GPL(ata_bmdma_irq_clear); | |
6735 | EXPORT_SYMBOL_GPL(ata_bmdma_status); | |
6736 | EXPORT_SYMBOL_GPL(ata_bmdma_stop); | |
6d97dbd7 TH |
6737 | EXPORT_SYMBOL_GPL(ata_bmdma_freeze); |
6738 | EXPORT_SYMBOL_GPL(ata_bmdma_thaw); | |
6739 | EXPORT_SYMBOL_GPL(ata_bmdma_drive_eh); | |
6740 | EXPORT_SYMBOL_GPL(ata_bmdma_error_handler); | |
6741 | EXPORT_SYMBOL_GPL(ata_bmdma_post_internal_cmd); | |
1da177e4 | 6742 | EXPORT_SYMBOL_GPL(ata_port_probe); |
10305f0f | 6743 | EXPORT_SYMBOL_GPL(ata_dev_disable); |
3c567b7d | 6744 | EXPORT_SYMBOL_GPL(sata_set_spd); |
d7bb4cc7 TH |
6745 | EXPORT_SYMBOL_GPL(sata_phy_debounce); |
6746 | EXPORT_SYMBOL_GPL(sata_phy_resume); | |
1da177e4 LT |
6747 | EXPORT_SYMBOL_GPL(sata_phy_reset); |
6748 | EXPORT_SYMBOL_GPL(__sata_phy_reset); | |
6749 | EXPORT_SYMBOL_GPL(ata_bus_reset); | |
f5914a46 | 6750 | EXPORT_SYMBOL_GPL(ata_std_prereset); |
c2bd5804 | 6751 | EXPORT_SYMBOL_GPL(ata_std_softreset); |
b6103f6d | 6752 | EXPORT_SYMBOL_GPL(sata_port_hardreset); |
c2bd5804 TH |
6753 | EXPORT_SYMBOL_GPL(sata_std_hardreset); |
6754 | EXPORT_SYMBOL_GPL(ata_std_postreset); | |
2e9edbf8 JG |
6755 | EXPORT_SYMBOL_GPL(ata_dev_classify); |
6756 | EXPORT_SYMBOL_GPL(ata_dev_pair); | |
1da177e4 | 6757 | EXPORT_SYMBOL_GPL(ata_port_disable); |
67846b30 | 6758 | EXPORT_SYMBOL_GPL(ata_ratelimit); |
c22daff4 | 6759 | EXPORT_SYMBOL_GPL(ata_wait_register); |
6f8b9958 | 6760 | EXPORT_SYMBOL_GPL(ata_busy_sleep); |
86e45b6b | 6761 | EXPORT_SYMBOL_GPL(ata_port_queue_task); |
1da177e4 LT |
6762 | EXPORT_SYMBOL_GPL(ata_scsi_ioctl); |
6763 | EXPORT_SYMBOL_GPL(ata_scsi_queuecmd); | |
1da177e4 | 6764 | EXPORT_SYMBOL_GPL(ata_scsi_slave_config); |
83c47bcb | 6765 | EXPORT_SYMBOL_GPL(ata_scsi_slave_destroy); |
a6e6ce8e | 6766 | EXPORT_SYMBOL_GPL(ata_scsi_change_queue_depth); |
1da177e4 | 6767 | EXPORT_SYMBOL_GPL(ata_host_intr); |
34bf2170 TH |
6768 | EXPORT_SYMBOL_GPL(sata_scr_valid); |
6769 | EXPORT_SYMBOL_GPL(sata_scr_read); | |
6770 | EXPORT_SYMBOL_GPL(sata_scr_write); | |
6771 | EXPORT_SYMBOL_GPL(sata_scr_write_flush); | |
6772 | EXPORT_SYMBOL_GPL(ata_port_online); | |
6773 | EXPORT_SYMBOL_GPL(ata_port_offline); | |
6ffa01d8 | 6774 | #ifdef CONFIG_PM |
cca3974e JG |
6775 | EXPORT_SYMBOL_GPL(ata_host_suspend); |
6776 | EXPORT_SYMBOL_GPL(ata_host_resume); | |
6ffa01d8 | 6777 | #endif /* CONFIG_PM */ |
6a62a04d TH |
6778 | EXPORT_SYMBOL_GPL(ata_id_string); |
6779 | EXPORT_SYMBOL_GPL(ata_id_c_string); | |
10305f0f | 6780 | EXPORT_SYMBOL_GPL(ata_id_to_dma_mode); |
6919a0a6 | 6781 | EXPORT_SYMBOL_GPL(ata_device_blacklisted); |
1da177e4 LT |
6782 | EXPORT_SYMBOL_GPL(ata_scsi_simulate); |
6783 | ||
1bc4ccff | 6784 | EXPORT_SYMBOL_GPL(ata_pio_need_iordy); |
452503f9 AC |
6785 | EXPORT_SYMBOL_GPL(ata_timing_compute); |
6786 | EXPORT_SYMBOL_GPL(ata_timing_merge); | |
6787 | ||
1da177e4 LT |
6788 | #ifdef CONFIG_PCI |
6789 | EXPORT_SYMBOL_GPL(pci_test_config_bits); | |
d491b27b | 6790 | EXPORT_SYMBOL_GPL(ata_pci_init_native_host); |
21b0ad4f | 6791 | EXPORT_SYMBOL_GPL(ata_pci_prepare_native_host); |
1da177e4 LT |
6792 | EXPORT_SYMBOL_GPL(ata_pci_init_one); |
6793 | EXPORT_SYMBOL_GPL(ata_pci_remove_one); | |
6ffa01d8 | 6794 | #ifdef CONFIG_PM |
500530f6 TH |
6795 | EXPORT_SYMBOL_GPL(ata_pci_device_do_suspend); |
6796 | EXPORT_SYMBOL_GPL(ata_pci_device_do_resume); | |
9b847548 JA |
6797 | EXPORT_SYMBOL_GPL(ata_pci_device_suspend); |
6798 | EXPORT_SYMBOL_GPL(ata_pci_device_resume); | |
6ffa01d8 | 6799 | #endif /* CONFIG_PM */ |
67951ade AC |
6800 | EXPORT_SYMBOL_GPL(ata_pci_default_filter); |
6801 | EXPORT_SYMBOL_GPL(ata_pci_clear_simplex); | |
1da177e4 | 6802 | #endif /* CONFIG_PCI */ |
9b847548 | 6803 | |
6ffa01d8 | 6804 | #ifdef CONFIG_PM |
9b847548 JA |
6805 | EXPORT_SYMBOL_GPL(ata_scsi_device_suspend); |
6806 | EXPORT_SYMBOL_GPL(ata_scsi_device_resume); | |
6ffa01d8 | 6807 | #endif /* CONFIG_PM */ |
ece1d636 | 6808 | |
ece1d636 | 6809 | EXPORT_SYMBOL_GPL(ata_eng_timeout); |
7b70fc03 TH |
6810 | EXPORT_SYMBOL_GPL(ata_port_schedule_eh); |
6811 | EXPORT_SYMBOL_GPL(ata_port_abort); | |
e3180499 TH |
6812 | EXPORT_SYMBOL_GPL(ata_port_freeze); |
6813 | EXPORT_SYMBOL_GPL(ata_eh_freeze_port); | |
6814 | EXPORT_SYMBOL_GPL(ata_eh_thaw_port); | |
ece1d636 TH |
6815 | EXPORT_SYMBOL_GPL(ata_eh_qc_complete); |
6816 | EXPORT_SYMBOL_GPL(ata_eh_qc_retry); | |
022bdb07 | 6817 | EXPORT_SYMBOL_GPL(ata_do_eh); |
83625006 AI |
6818 | EXPORT_SYMBOL_GPL(ata_irq_on); |
6819 | EXPORT_SYMBOL_GPL(ata_dummy_irq_on); | |
6820 | EXPORT_SYMBOL_GPL(ata_irq_ack); | |
6821 | EXPORT_SYMBOL_GPL(ata_dummy_irq_ack); | |
a619f981 | 6822 | EXPORT_SYMBOL_GPL(ata_dev_try_classify); |
be0d18df AC |
6823 | |
6824 | EXPORT_SYMBOL_GPL(ata_cable_40wire); | |
6825 | EXPORT_SYMBOL_GPL(ata_cable_80wire); | |
6826 | EXPORT_SYMBOL_GPL(ata_cable_unknown); | |
6827 | EXPORT_SYMBOL_GPL(ata_cable_sata); |