Commit | Line | Data |
---|---|---|
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 | ||
fda0efc5 | 62 | |
d7bb4cc7 | 63 | /* debounce timing parameters in msecs { interval, duration, timeout } */ |
e9c83914 TH |
64 | const unsigned long sata_deb_timing_normal[] = { 5, 100, 2000 }; |
65 | const unsigned long sata_deb_timing_hotplug[] = { 25, 500, 2000 }; | |
66 | const unsigned long sata_deb_timing_long[] = { 100, 2000, 5000 }; | |
d7bb4cc7 | 67 | |
3373efd8 TH |
68 | static unsigned int ata_dev_init_params(struct ata_device *dev, |
69 | u16 heads, u16 sectors); | |
70 | static unsigned int ata_dev_set_xfermode(struct ata_device *dev); | |
9f45cbd3 | 71 | static unsigned int ata_dev_set_AN(struct ata_device *dev, u8 enable); |
3373efd8 | 72 | static void ata_dev_xfermask(struct ata_device *dev); |
75683fe7 | 73 | static unsigned long ata_dev_blacklisted(const 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 | ||
baf4fdfa ML |
88 | int atapi_passthru16 = 1; |
89 | module_param(atapi_passthru16, int, 0444); | |
90 | MODULE_PARM_DESC(atapi_passthru16, "Enable ATA_16 passthru for ATAPI devices; on by default (0=off, 1=on)"); | |
91 | ||
c3c013a2 JG |
92 | int libata_fua = 0; |
93 | module_param_named(fua, libata_fua, int, 0444); | |
94 | MODULE_PARM_DESC(fua, "FUA support (0=off, 1=on)"); | |
95 | ||
1e999736 AC |
96 | static int ata_ignore_hpa = 0; |
97 | module_param_named(ignore_hpa, ata_ignore_hpa, int, 0644); | |
98 | MODULE_PARM_DESC(ignore_hpa, "Ignore HPA limit (0=keep BIOS limits, 1=ignore limits, using full disk)"); | |
99 | ||
a8601e5f AM |
100 | static int ata_probe_timeout = ATA_TMOUT_INTERNAL / HZ; |
101 | module_param(ata_probe_timeout, int, 0444); | |
102 | MODULE_PARM_DESC(ata_probe_timeout, "Set ATA probing timeout (seconds)"); | |
103 | ||
d7d0dad6 JG |
104 | int libata_noacpi = 1; |
105 | module_param_named(noacpi, libata_noacpi, int, 0444); | |
11ef697b KCA |
106 | MODULE_PARM_DESC(noacpi, "Disables the use of ACPI in suspend/resume when set"); |
107 | ||
1da177e4 LT |
108 | MODULE_AUTHOR("Jeff Garzik"); |
109 | MODULE_DESCRIPTION("Library module for ATA devices"); | |
110 | MODULE_LICENSE("GPL"); | |
111 | MODULE_VERSION(DRV_VERSION); | |
112 | ||
0baab86b | 113 | |
1da177e4 LT |
114 | /** |
115 | * ata_tf_to_fis - Convert ATA taskfile to SATA FIS structure | |
116 | * @tf: Taskfile to convert | |
1da177e4 | 117 | * @pmp: Port multiplier port |
9977126c TH |
118 | * @is_cmd: This FIS is for command |
119 | * @fis: Buffer into which data will output | |
1da177e4 LT |
120 | * |
121 | * Converts a standard ATA taskfile to a Serial ATA | |
122 | * FIS structure (Register - Host to Device). | |
123 | * | |
124 | * LOCKING: | |
125 | * Inherited from caller. | |
126 | */ | |
9977126c | 127 | void ata_tf_to_fis(const struct ata_taskfile *tf, u8 pmp, int is_cmd, u8 *fis) |
1da177e4 | 128 | { |
9977126c TH |
129 | fis[0] = 0x27; /* Register - Host to Device FIS */ |
130 | fis[1] = pmp & 0xf; /* Port multiplier number*/ | |
131 | if (is_cmd) | |
132 | fis[1] |= (1 << 7); /* bit 7 indicates Command FIS */ | |
133 | ||
1da177e4 LT |
134 | fis[2] = tf->command; |
135 | fis[3] = tf->feature; | |
136 | ||
137 | fis[4] = tf->lbal; | |
138 | fis[5] = tf->lbam; | |
139 | fis[6] = tf->lbah; | |
140 | fis[7] = tf->device; | |
141 | ||
142 | fis[8] = tf->hob_lbal; | |
143 | fis[9] = tf->hob_lbam; | |
144 | fis[10] = tf->hob_lbah; | |
145 | fis[11] = tf->hob_feature; | |
146 | ||
147 | fis[12] = tf->nsect; | |
148 | fis[13] = tf->hob_nsect; | |
149 | fis[14] = 0; | |
150 | fis[15] = tf->ctl; | |
151 | ||
152 | fis[16] = 0; | |
153 | fis[17] = 0; | |
154 | fis[18] = 0; | |
155 | fis[19] = 0; | |
156 | } | |
157 | ||
158 | /** | |
159 | * ata_tf_from_fis - Convert SATA FIS to ATA taskfile | |
160 | * @fis: Buffer from which data will be input | |
161 | * @tf: Taskfile to output | |
162 | * | |
e12a1be6 | 163 | * Converts a serial ATA FIS structure to a standard ATA taskfile. |
1da177e4 LT |
164 | * |
165 | * LOCKING: | |
166 | * Inherited from caller. | |
167 | */ | |
168 | ||
057ace5e | 169 | void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf) |
1da177e4 LT |
170 | { |
171 | tf->command = fis[2]; /* status */ | |
172 | tf->feature = fis[3]; /* error */ | |
173 | ||
174 | tf->lbal = fis[4]; | |
175 | tf->lbam = fis[5]; | |
176 | tf->lbah = fis[6]; | |
177 | tf->device = fis[7]; | |
178 | ||
179 | tf->hob_lbal = fis[8]; | |
180 | tf->hob_lbam = fis[9]; | |
181 | tf->hob_lbah = fis[10]; | |
182 | ||
183 | tf->nsect = fis[12]; | |
184 | tf->hob_nsect = fis[13]; | |
185 | } | |
186 | ||
8cbd6df1 AL |
187 | static const u8 ata_rw_cmds[] = { |
188 | /* pio multi */ | |
189 | ATA_CMD_READ_MULTI, | |
190 | ATA_CMD_WRITE_MULTI, | |
191 | ATA_CMD_READ_MULTI_EXT, | |
192 | ATA_CMD_WRITE_MULTI_EXT, | |
9a3dccc4 TH |
193 | 0, |
194 | 0, | |
195 | 0, | |
196 | ATA_CMD_WRITE_MULTI_FUA_EXT, | |
8cbd6df1 AL |
197 | /* pio */ |
198 | ATA_CMD_PIO_READ, | |
199 | ATA_CMD_PIO_WRITE, | |
200 | ATA_CMD_PIO_READ_EXT, | |
201 | ATA_CMD_PIO_WRITE_EXT, | |
9a3dccc4 TH |
202 | 0, |
203 | 0, | |
204 | 0, | |
205 | 0, | |
8cbd6df1 AL |
206 | /* dma */ |
207 | ATA_CMD_READ, | |
208 | ATA_CMD_WRITE, | |
209 | ATA_CMD_READ_EXT, | |
9a3dccc4 TH |
210 | ATA_CMD_WRITE_EXT, |
211 | 0, | |
212 | 0, | |
213 | 0, | |
214 | ATA_CMD_WRITE_FUA_EXT | |
8cbd6df1 | 215 | }; |
1da177e4 LT |
216 | |
217 | /** | |
8cbd6df1 | 218 | * ata_rwcmd_protocol - set taskfile r/w commands and protocol |
bd056d7e TH |
219 | * @tf: command to examine and configure |
220 | * @dev: device tf belongs to | |
1da177e4 | 221 | * |
2e9edbf8 | 222 | * Examine the device configuration and tf->flags to calculate |
8cbd6df1 | 223 | * the proper read/write commands and protocol to use. |
1da177e4 LT |
224 | * |
225 | * LOCKING: | |
226 | * caller. | |
227 | */ | |
bd056d7e | 228 | static int ata_rwcmd_protocol(struct ata_taskfile *tf, struct ata_device *dev) |
1da177e4 | 229 | { |
9a3dccc4 | 230 | u8 cmd; |
1da177e4 | 231 | |
9a3dccc4 | 232 | int index, fua, lba48, write; |
2e9edbf8 | 233 | |
9a3dccc4 | 234 | fua = (tf->flags & ATA_TFLAG_FUA) ? 4 : 0; |
8cbd6df1 AL |
235 | lba48 = (tf->flags & ATA_TFLAG_LBA48) ? 2 : 0; |
236 | write = (tf->flags & ATA_TFLAG_WRITE) ? 1 : 0; | |
1da177e4 | 237 | |
8cbd6df1 AL |
238 | if (dev->flags & ATA_DFLAG_PIO) { |
239 | tf->protocol = ATA_PROT_PIO; | |
9a3dccc4 | 240 | index = dev->multi_count ? 0 : 8; |
9af5c9c9 | 241 | } else if (lba48 && (dev->link->ap->flags & ATA_FLAG_PIO_LBA48)) { |
8d238e01 AC |
242 | /* Unable to use DMA due to host limitation */ |
243 | tf->protocol = ATA_PROT_PIO; | |
0565c26d | 244 | index = dev->multi_count ? 0 : 8; |
8cbd6df1 AL |
245 | } else { |
246 | tf->protocol = ATA_PROT_DMA; | |
9a3dccc4 | 247 | index = 16; |
8cbd6df1 | 248 | } |
1da177e4 | 249 | |
9a3dccc4 TH |
250 | cmd = ata_rw_cmds[index + fua + lba48 + write]; |
251 | if (cmd) { | |
252 | tf->command = cmd; | |
253 | return 0; | |
254 | } | |
255 | return -1; | |
1da177e4 LT |
256 | } |
257 | ||
35b649fe TH |
258 | /** |
259 | * ata_tf_read_block - Read block address from ATA taskfile | |
260 | * @tf: ATA taskfile of interest | |
261 | * @dev: ATA device @tf belongs to | |
262 | * | |
263 | * LOCKING: | |
264 | * None. | |
265 | * | |
266 | * Read block address from @tf. This function can handle all | |
267 | * three address formats - LBA, LBA48 and CHS. tf->protocol and | |
268 | * flags select the address format to use. | |
269 | * | |
270 | * RETURNS: | |
271 | * Block address read from @tf. | |
272 | */ | |
273 | u64 ata_tf_read_block(struct ata_taskfile *tf, struct ata_device *dev) | |
274 | { | |
275 | u64 block = 0; | |
276 | ||
277 | if (tf->flags & ATA_TFLAG_LBA) { | |
278 | if (tf->flags & ATA_TFLAG_LBA48) { | |
279 | block |= (u64)tf->hob_lbah << 40; | |
280 | block |= (u64)tf->hob_lbam << 32; | |
281 | block |= tf->hob_lbal << 24; | |
282 | } else | |
283 | block |= (tf->device & 0xf) << 24; | |
284 | ||
285 | block |= tf->lbah << 16; | |
286 | block |= tf->lbam << 8; | |
287 | block |= tf->lbal; | |
288 | } else { | |
289 | u32 cyl, head, sect; | |
290 | ||
291 | cyl = tf->lbam | (tf->lbah << 8); | |
292 | head = tf->device & 0xf; | |
293 | sect = tf->lbal; | |
294 | ||
295 | block = (cyl * dev->heads + head) * dev->sectors + sect; | |
296 | } | |
297 | ||
298 | return block; | |
299 | } | |
300 | ||
bd056d7e TH |
301 | /** |
302 | * ata_build_rw_tf - Build ATA taskfile for given read/write request | |
303 | * @tf: Target ATA taskfile | |
304 | * @dev: ATA device @tf belongs to | |
305 | * @block: Block address | |
306 | * @n_block: Number of blocks | |
307 | * @tf_flags: RW/FUA etc... | |
308 | * @tag: tag | |
309 | * | |
310 | * LOCKING: | |
311 | * None. | |
312 | * | |
313 | * Build ATA taskfile @tf for read/write request described by | |
314 | * @block, @n_block, @tf_flags and @tag on @dev. | |
315 | * | |
316 | * RETURNS: | |
317 | * | |
318 | * 0 on success, -ERANGE if the request is too large for @dev, | |
319 | * -EINVAL if the request is invalid. | |
320 | */ | |
321 | int ata_build_rw_tf(struct ata_taskfile *tf, struct ata_device *dev, | |
322 | u64 block, u32 n_block, unsigned int tf_flags, | |
323 | unsigned int tag) | |
324 | { | |
325 | tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
326 | tf->flags |= tf_flags; | |
327 | ||
6d1245bf | 328 | if (ata_ncq_enabled(dev) && likely(tag != ATA_TAG_INTERNAL)) { |
bd056d7e TH |
329 | /* yay, NCQ */ |
330 | if (!lba_48_ok(block, n_block)) | |
331 | return -ERANGE; | |
332 | ||
333 | tf->protocol = ATA_PROT_NCQ; | |
334 | tf->flags |= ATA_TFLAG_LBA | ATA_TFLAG_LBA48; | |
335 | ||
336 | if (tf->flags & ATA_TFLAG_WRITE) | |
337 | tf->command = ATA_CMD_FPDMA_WRITE; | |
338 | else | |
339 | tf->command = ATA_CMD_FPDMA_READ; | |
340 | ||
341 | tf->nsect = tag << 3; | |
342 | tf->hob_feature = (n_block >> 8) & 0xff; | |
343 | tf->feature = n_block & 0xff; | |
344 | ||
345 | tf->hob_lbah = (block >> 40) & 0xff; | |
346 | tf->hob_lbam = (block >> 32) & 0xff; | |
347 | tf->hob_lbal = (block >> 24) & 0xff; | |
348 | tf->lbah = (block >> 16) & 0xff; | |
349 | tf->lbam = (block >> 8) & 0xff; | |
350 | tf->lbal = block & 0xff; | |
351 | ||
352 | tf->device = 1 << 6; | |
353 | if (tf->flags & ATA_TFLAG_FUA) | |
354 | tf->device |= 1 << 7; | |
355 | } else if (dev->flags & ATA_DFLAG_LBA) { | |
356 | tf->flags |= ATA_TFLAG_LBA; | |
357 | ||
358 | if (lba_28_ok(block, n_block)) { | |
359 | /* use LBA28 */ | |
360 | tf->device |= (block >> 24) & 0xf; | |
361 | } else if (lba_48_ok(block, n_block)) { | |
362 | if (!(dev->flags & ATA_DFLAG_LBA48)) | |
363 | return -ERANGE; | |
364 | ||
365 | /* use LBA48 */ | |
366 | tf->flags |= ATA_TFLAG_LBA48; | |
367 | ||
368 | tf->hob_nsect = (n_block >> 8) & 0xff; | |
369 | ||
370 | tf->hob_lbah = (block >> 40) & 0xff; | |
371 | tf->hob_lbam = (block >> 32) & 0xff; | |
372 | tf->hob_lbal = (block >> 24) & 0xff; | |
373 | } else | |
374 | /* request too large even for LBA48 */ | |
375 | return -ERANGE; | |
376 | ||
377 | if (unlikely(ata_rwcmd_protocol(tf, dev) < 0)) | |
378 | return -EINVAL; | |
379 | ||
380 | tf->nsect = n_block & 0xff; | |
381 | ||
382 | tf->lbah = (block >> 16) & 0xff; | |
383 | tf->lbam = (block >> 8) & 0xff; | |
384 | tf->lbal = block & 0xff; | |
385 | ||
386 | tf->device |= ATA_LBA; | |
387 | } else { | |
388 | /* CHS */ | |
389 | u32 sect, head, cyl, track; | |
390 | ||
391 | /* The request -may- be too large for CHS addressing. */ | |
392 | if (!lba_28_ok(block, n_block)) | |
393 | return -ERANGE; | |
394 | ||
395 | if (unlikely(ata_rwcmd_protocol(tf, dev) < 0)) | |
396 | return -EINVAL; | |
397 | ||
398 | /* Convert LBA to CHS */ | |
399 | track = (u32)block / dev->sectors; | |
400 | cyl = track / dev->heads; | |
401 | head = track % dev->heads; | |
402 | sect = (u32)block % dev->sectors + 1; | |
403 | ||
404 | DPRINTK("block %u track %u cyl %u head %u sect %u\n", | |
405 | (u32)block, track, cyl, head, sect); | |
406 | ||
407 | /* Check whether the converted CHS can fit. | |
408 | Cylinder: 0-65535 | |
409 | Head: 0-15 | |
410 | Sector: 1-255*/ | |
411 | if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect)) | |
412 | return -ERANGE; | |
413 | ||
414 | tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */ | |
415 | tf->lbal = sect; | |
416 | tf->lbam = cyl; | |
417 | tf->lbah = cyl >> 8; | |
418 | tf->device |= head; | |
419 | } | |
420 | ||
421 | return 0; | |
422 | } | |
423 | ||
cb95d562 TH |
424 | /** |
425 | * ata_pack_xfermask - Pack pio, mwdma and udma masks into xfer_mask | |
426 | * @pio_mask: pio_mask | |
427 | * @mwdma_mask: mwdma_mask | |
428 | * @udma_mask: udma_mask | |
429 | * | |
430 | * Pack @pio_mask, @mwdma_mask and @udma_mask into a single | |
431 | * unsigned int xfer_mask. | |
432 | * | |
433 | * LOCKING: | |
434 | * None. | |
435 | * | |
436 | * RETURNS: | |
437 | * Packed xfer_mask. | |
438 | */ | |
439 | static unsigned int ata_pack_xfermask(unsigned int pio_mask, | |
440 | unsigned int mwdma_mask, | |
441 | unsigned int udma_mask) | |
442 | { | |
443 | return ((pio_mask << ATA_SHIFT_PIO) & ATA_MASK_PIO) | | |
444 | ((mwdma_mask << ATA_SHIFT_MWDMA) & ATA_MASK_MWDMA) | | |
445 | ((udma_mask << ATA_SHIFT_UDMA) & ATA_MASK_UDMA); | |
446 | } | |
447 | ||
c0489e4e TH |
448 | /** |
449 | * ata_unpack_xfermask - Unpack xfer_mask into pio, mwdma and udma masks | |
450 | * @xfer_mask: xfer_mask to unpack | |
451 | * @pio_mask: resulting pio_mask | |
452 | * @mwdma_mask: resulting mwdma_mask | |
453 | * @udma_mask: resulting udma_mask | |
454 | * | |
455 | * Unpack @xfer_mask into @pio_mask, @mwdma_mask and @udma_mask. | |
456 | * Any NULL distination masks will be ignored. | |
457 | */ | |
458 | static void ata_unpack_xfermask(unsigned int xfer_mask, | |
459 | unsigned int *pio_mask, | |
460 | unsigned int *mwdma_mask, | |
461 | unsigned int *udma_mask) | |
462 | { | |
463 | if (pio_mask) | |
464 | *pio_mask = (xfer_mask & ATA_MASK_PIO) >> ATA_SHIFT_PIO; | |
465 | if (mwdma_mask) | |
466 | *mwdma_mask = (xfer_mask & ATA_MASK_MWDMA) >> ATA_SHIFT_MWDMA; | |
467 | if (udma_mask) | |
468 | *udma_mask = (xfer_mask & ATA_MASK_UDMA) >> ATA_SHIFT_UDMA; | |
469 | } | |
470 | ||
cb95d562 | 471 | static const struct ata_xfer_ent { |
be9a50c8 | 472 | int shift, bits; |
cb95d562 TH |
473 | u8 base; |
474 | } ata_xfer_tbl[] = { | |
475 | { ATA_SHIFT_PIO, ATA_BITS_PIO, XFER_PIO_0 }, | |
476 | { ATA_SHIFT_MWDMA, ATA_BITS_MWDMA, XFER_MW_DMA_0 }, | |
477 | { ATA_SHIFT_UDMA, ATA_BITS_UDMA, XFER_UDMA_0 }, | |
478 | { -1, }, | |
479 | }; | |
480 | ||
481 | /** | |
482 | * ata_xfer_mask2mode - Find matching XFER_* for the given xfer_mask | |
483 | * @xfer_mask: xfer_mask of interest | |
484 | * | |
485 | * Return matching XFER_* value for @xfer_mask. Only the highest | |
486 | * bit of @xfer_mask is considered. | |
487 | * | |
488 | * LOCKING: | |
489 | * None. | |
490 | * | |
491 | * RETURNS: | |
492 | * Matching XFER_* value, 0 if no match found. | |
493 | */ | |
494 | static u8 ata_xfer_mask2mode(unsigned int xfer_mask) | |
495 | { | |
496 | int highbit = fls(xfer_mask) - 1; | |
497 | const struct ata_xfer_ent *ent; | |
498 | ||
499 | for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) | |
500 | if (highbit >= ent->shift && highbit < ent->shift + ent->bits) | |
501 | return ent->base + highbit - ent->shift; | |
502 | return 0; | |
503 | } | |
504 | ||
505 | /** | |
506 | * ata_xfer_mode2mask - Find matching xfer_mask for XFER_* | |
507 | * @xfer_mode: XFER_* of interest | |
508 | * | |
509 | * Return matching xfer_mask for @xfer_mode. | |
510 | * | |
511 | * LOCKING: | |
512 | * None. | |
513 | * | |
514 | * RETURNS: | |
515 | * Matching xfer_mask, 0 if no match found. | |
516 | */ | |
517 | static unsigned int ata_xfer_mode2mask(u8 xfer_mode) | |
518 | { | |
519 | const struct ata_xfer_ent *ent; | |
520 | ||
521 | for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) | |
522 | if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits) | |
523 | return 1 << (ent->shift + xfer_mode - ent->base); | |
524 | return 0; | |
525 | } | |
526 | ||
527 | /** | |
528 | * ata_xfer_mode2shift - Find matching xfer_shift for XFER_* | |
529 | * @xfer_mode: XFER_* of interest | |
530 | * | |
531 | * Return matching xfer_shift for @xfer_mode. | |
532 | * | |
533 | * LOCKING: | |
534 | * None. | |
535 | * | |
536 | * RETURNS: | |
537 | * Matching xfer_shift, -1 if no match found. | |
538 | */ | |
539 | static int ata_xfer_mode2shift(unsigned int xfer_mode) | |
540 | { | |
541 | const struct ata_xfer_ent *ent; | |
542 | ||
543 | for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) | |
544 | if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits) | |
545 | return ent->shift; | |
546 | return -1; | |
547 | } | |
548 | ||
1da177e4 | 549 | /** |
1da7b0d0 TH |
550 | * ata_mode_string - convert xfer_mask to string |
551 | * @xfer_mask: mask of bits supported; only highest bit counts. | |
1da177e4 LT |
552 | * |
553 | * Determine string which represents the highest speed | |
1da7b0d0 | 554 | * (highest bit in @modemask). |
1da177e4 LT |
555 | * |
556 | * LOCKING: | |
557 | * None. | |
558 | * | |
559 | * RETURNS: | |
560 | * Constant C string representing highest speed listed in | |
1da7b0d0 | 561 | * @mode_mask, or the constant C string "<n/a>". |
1da177e4 | 562 | */ |
1da7b0d0 | 563 | static const char *ata_mode_string(unsigned int xfer_mask) |
1da177e4 | 564 | { |
75f554bc TH |
565 | static const char * const xfer_mode_str[] = { |
566 | "PIO0", | |
567 | "PIO1", | |
568 | "PIO2", | |
569 | "PIO3", | |
570 | "PIO4", | |
b352e57d AC |
571 | "PIO5", |
572 | "PIO6", | |
75f554bc TH |
573 | "MWDMA0", |
574 | "MWDMA1", | |
575 | "MWDMA2", | |
b352e57d AC |
576 | "MWDMA3", |
577 | "MWDMA4", | |
75f554bc TH |
578 | "UDMA/16", |
579 | "UDMA/25", | |
580 | "UDMA/33", | |
581 | "UDMA/44", | |
582 | "UDMA/66", | |
583 | "UDMA/100", | |
584 | "UDMA/133", | |
585 | "UDMA7", | |
586 | }; | |
1da7b0d0 | 587 | int highbit; |
1da177e4 | 588 | |
1da7b0d0 TH |
589 | highbit = fls(xfer_mask) - 1; |
590 | if (highbit >= 0 && highbit < ARRAY_SIZE(xfer_mode_str)) | |
591 | return xfer_mode_str[highbit]; | |
1da177e4 | 592 | return "<n/a>"; |
1da177e4 LT |
593 | } |
594 | ||
4c360c81 TH |
595 | static const char *sata_spd_string(unsigned int spd) |
596 | { | |
597 | static const char * const spd_str[] = { | |
598 | "1.5 Gbps", | |
599 | "3.0 Gbps", | |
600 | }; | |
601 | ||
602 | if (spd == 0 || (spd - 1) >= ARRAY_SIZE(spd_str)) | |
603 | return "<unknown>"; | |
604 | return spd_str[spd - 1]; | |
605 | } | |
606 | ||
3373efd8 | 607 | void ata_dev_disable(struct ata_device *dev) |
0b8efb0a | 608 | { |
09d7f9b0 | 609 | if (ata_dev_enabled(dev)) { |
9af5c9c9 | 610 | if (ata_msg_drv(dev->link->ap)) |
09d7f9b0 | 611 | ata_dev_printk(dev, KERN_WARNING, "disabled\n"); |
4ae72a1e TH |
612 | ata_down_xfermask_limit(dev, ATA_DNXFER_FORCE_PIO0 | |
613 | ATA_DNXFER_QUIET); | |
0b8efb0a TH |
614 | dev->class++; |
615 | } | |
616 | } | |
617 | ||
1da177e4 | 618 | /** |
0d5ff566 | 619 | * ata_devchk - PATA device presence detection |
1da177e4 LT |
620 | * @ap: ATA channel to examine |
621 | * @device: Device to examine (starting at zero) | |
622 | * | |
623 | * This technique was originally described in | |
624 | * Hale Landis's ATADRVR (www.ata-atapi.com), and | |
625 | * later found its way into the ATA/ATAPI spec. | |
626 | * | |
627 | * Write a pattern to the ATA shadow registers, | |
628 | * and if a device is present, it will respond by | |
629 | * correctly storing and echoing back the | |
630 | * ATA shadow register contents. | |
631 | * | |
632 | * LOCKING: | |
633 | * caller. | |
634 | */ | |
635 | ||
0d5ff566 | 636 | static unsigned int ata_devchk(struct ata_port *ap, unsigned int device) |
1da177e4 LT |
637 | { |
638 | struct ata_ioports *ioaddr = &ap->ioaddr; | |
639 | u8 nsect, lbal; | |
640 | ||
641 | ap->ops->dev_select(ap, device); | |
642 | ||
0d5ff566 TH |
643 | iowrite8(0x55, ioaddr->nsect_addr); |
644 | iowrite8(0xaa, ioaddr->lbal_addr); | |
1da177e4 | 645 | |
0d5ff566 TH |
646 | iowrite8(0xaa, ioaddr->nsect_addr); |
647 | iowrite8(0x55, ioaddr->lbal_addr); | |
1da177e4 | 648 | |
0d5ff566 TH |
649 | iowrite8(0x55, ioaddr->nsect_addr); |
650 | iowrite8(0xaa, ioaddr->lbal_addr); | |
1da177e4 | 651 | |
0d5ff566 TH |
652 | nsect = ioread8(ioaddr->nsect_addr); |
653 | lbal = ioread8(ioaddr->lbal_addr); | |
1da177e4 LT |
654 | |
655 | if ((nsect == 0x55) && (lbal == 0xaa)) | |
656 | return 1; /* we found a device */ | |
657 | ||
658 | return 0; /* nothing found */ | |
659 | } | |
660 | ||
1da177e4 LT |
661 | /** |
662 | * ata_dev_classify - determine device type based on ATA-spec signature | |
663 | * @tf: ATA taskfile register set for device to be identified | |
664 | * | |
665 | * Determine from taskfile register contents whether a device is | |
666 | * ATA or ATAPI, as per "Signature and persistence" section | |
667 | * of ATA/PI spec (volume 1, sect 5.14). | |
668 | * | |
669 | * LOCKING: | |
670 | * None. | |
671 | * | |
672 | * RETURNS: | |
633273a3 TH |
673 | * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, %ATA_DEV_PMP or |
674 | * %ATA_DEV_UNKNOWN the event of failure. | |
1da177e4 | 675 | */ |
057ace5e | 676 | unsigned int ata_dev_classify(const struct ata_taskfile *tf) |
1da177e4 LT |
677 | { |
678 | /* Apple's open source Darwin code hints that some devices only | |
679 | * put a proper signature into the LBA mid/high registers, | |
680 | * So, we only check those. It's sufficient for uniqueness. | |
633273a3 TH |
681 | * |
682 | * ATA/ATAPI-7 (d1532v1r1: Feb. 19, 2003) specified separate | |
683 | * signatures for ATA and ATAPI devices attached on SerialATA, | |
684 | * 0x3c/0xc3 and 0x69/0x96 respectively. However, SerialATA | |
685 | * spec has never mentioned about using different signatures | |
686 | * for ATA/ATAPI devices. Then, Serial ATA II: Port | |
687 | * Multiplier specification began to use 0x69/0x96 to identify | |
688 | * port multpliers and 0x3c/0xc3 to identify SEMB device. | |
689 | * ATA/ATAPI-7 dropped descriptions about 0x3c/0xc3 and | |
690 | * 0x69/0x96 shortly and described them as reserved for | |
691 | * SerialATA. | |
692 | * | |
693 | * We follow the current spec and consider that 0x69/0x96 | |
694 | * identifies a port multiplier and 0x3c/0xc3 a SEMB device. | |
1da177e4 | 695 | */ |
633273a3 | 696 | if ((tf->lbam == 0) && (tf->lbah == 0)) { |
1da177e4 LT |
697 | DPRINTK("found ATA device by sig\n"); |
698 | return ATA_DEV_ATA; | |
699 | } | |
700 | ||
633273a3 | 701 | if ((tf->lbam == 0x14) && (tf->lbah == 0xeb)) { |
1da177e4 LT |
702 | DPRINTK("found ATAPI device by sig\n"); |
703 | return ATA_DEV_ATAPI; | |
704 | } | |
705 | ||
633273a3 TH |
706 | if ((tf->lbam == 0x69) && (tf->lbah == 0x96)) { |
707 | DPRINTK("found PMP device by sig\n"); | |
708 | return ATA_DEV_PMP; | |
709 | } | |
710 | ||
711 | if ((tf->lbam == 0x3c) && (tf->lbah == 0xc3)) { | |
712 | printk("ata: SEMB device ignored\n"); | |
713 | return ATA_DEV_SEMB_UNSUP; /* not yet */ | |
714 | } | |
715 | ||
1da177e4 LT |
716 | DPRINTK("unknown device\n"); |
717 | return ATA_DEV_UNKNOWN; | |
718 | } | |
719 | ||
720 | /** | |
721 | * ata_dev_try_classify - Parse returned ATA device signature | |
3f19859e TH |
722 | * @dev: ATA device to classify (starting at zero) |
723 | * @present: device seems present | |
b4dc7623 | 724 | * @r_err: Value of error register on completion |
1da177e4 LT |
725 | * |
726 | * After an event -- SRST, E.D.D., or SATA COMRESET -- occurs, | |
727 | * an ATA/ATAPI-defined set of values is placed in the ATA | |
728 | * shadow registers, indicating the results of device detection | |
729 | * and diagnostics. | |
730 | * | |
731 | * Select the ATA device, and read the values from the ATA shadow | |
732 | * registers. Then parse according to the Error register value, | |
733 | * and the spec-defined values examined by ata_dev_classify(). | |
734 | * | |
735 | * LOCKING: | |
736 | * caller. | |
b4dc7623 TH |
737 | * |
738 | * RETURNS: | |
739 | * Device type - %ATA_DEV_ATA, %ATA_DEV_ATAPI or %ATA_DEV_NONE. | |
1da177e4 | 740 | */ |
3f19859e TH |
741 | unsigned int ata_dev_try_classify(struct ata_device *dev, int present, |
742 | u8 *r_err) | |
1da177e4 | 743 | { |
3f19859e | 744 | struct ata_port *ap = dev->link->ap; |
1da177e4 LT |
745 | struct ata_taskfile tf; |
746 | unsigned int class; | |
747 | u8 err; | |
748 | ||
3f19859e | 749 | ap->ops->dev_select(ap, dev->devno); |
1da177e4 LT |
750 | |
751 | memset(&tf, 0, sizeof(tf)); | |
752 | ||
1da177e4 | 753 | ap->ops->tf_read(ap, &tf); |
0169e284 | 754 | err = tf.feature; |
b4dc7623 TH |
755 | if (r_err) |
756 | *r_err = err; | |
1da177e4 | 757 | |
93590859 | 758 | /* see if device passed diags: if master then continue and warn later */ |
3f19859e | 759 | if (err == 0 && dev->devno == 0) |
93590859 | 760 | /* diagnostic fail : do nothing _YET_ */ |
3f19859e | 761 | dev->horkage |= ATA_HORKAGE_DIAGNOSTIC; |
93590859 | 762 | else if (err == 1) |
1da177e4 | 763 | /* do nothing */ ; |
3f19859e | 764 | else if ((dev->devno == 0) && (err == 0x81)) |
1da177e4 LT |
765 | /* do nothing */ ; |
766 | else | |
b4dc7623 | 767 | return ATA_DEV_NONE; |
1da177e4 | 768 | |
b4dc7623 | 769 | /* determine if device is ATA or ATAPI */ |
1da177e4 | 770 | class = ata_dev_classify(&tf); |
b4dc7623 | 771 | |
d7fbee05 TH |
772 | if (class == ATA_DEV_UNKNOWN) { |
773 | /* If the device failed diagnostic, it's likely to | |
774 | * have reported incorrect device signature too. | |
775 | * Assume ATA device if the device seems present but | |
776 | * device signature is invalid with diagnostic | |
777 | * failure. | |
778 | */ | |
779 | if (present && (dev->horkage & ATA_HORKAGE_DIAGNOSTIC)) | |
780 | class = ATA_DEV_ATA; | |
781 | else | |
782 | class = ATA_DEV_NONE; | |
783 | } else if ((class == ATA_DEV_ATA) && (ata_chk_status(ap) == 0)) | |
784 | class = ATA_DEV_NONE; | |
785 | ||
b4dc7623 | 786 | return class; |
1da177e4 LT |
787 | } |
788 | ||
789 | /** | |
6a62a04d | 790 | * ata_id_string - Convert IDENTIFY DEVICE page into string |
1da177e4 LT |
791 | * @id: IDENTIFY DEVICE results we will examine |
792 | * @s: string into which data is output | |
793 | * @ofs: offset into identify device page | |
794 | * @len: length of string to return. must be an even number. | |
795 | * | |
796 | * The strings in the IDENTIFY DEVICE page are broken up into | |
797 | * 16-bit chunks. Run through the string, and output each | |
798 | * 8-bit chunk linearly, regardless of platform. | |
799 | * | |
800 | * LOCKING: | |
801 | * caller. | |
802 | */ | |
803 | ||
6a62a04d TH |
804 | void ata_id_string(const u16 *id, unsigned char *s, |
805 | unsigned int ofs, unsigned int len) | |
1da177e4 LT |
806 | { |
807 | unsigned int c; | |
808 | ||
809 | while (len > 0) { | |
810 | c = id[ofs] >> 8; | |
811 | *s = c; | |
812 | s++; | |
813 | ||
814 | c = id[ofs] & 0xff; | |
815 | *s = c; | |
816 | s++; | |
817 | ||
818 | ofs++; | |
819 | len -= 2; | |
820 | } | |
821 | } | |
822 | ||
0e949ff3 | 823 | /** |
6a62a04d | 824 | * ata_id_c_string - Convert IDENTIFY DEVICE page into C string |
0e949ff3 TH |
825 | * @id: IDENTIFY DEVICE results we will examine |
826 | * @s: string into which data is output | |
827 | * @ofs: offset into identify device page | |
828 | * @len: length of string to return. must be an odd number. | |
829 | * | |
6a62a04d | 830 | * This function is identical to ata_id_string except that it |
0e949ff3 TH |
831 | * trims trailing spaces and terminates the resulting string with |
832 | * null. @len must be actual maximum length (even number) + 1. | |
833 | * | |
834 | * LOCKING: | |
835 | * caller. | |
836 | */ | |
6a62a04d TH |
837 | void ata_id_c_string(const u16 *id, unsigned char *s, |
838 | unsigned int ofs, unsigned int len) | |
0e949ff3 TH |
839 | { |
840 | unsigned char *p; | |
841 | ||
842 | WARN_ON(!(len & 1)); | |
843 | ||
6a62a04d | 844 | ata_id_string(id, s, ofs, len - 1); |
0e949ff3 TH |
845 | |
846 | p = s + strnlen(s, len - 1); | |
847 | while (p > s && p[-1] == ' ') | |
848 | p--; | |
849 | *p = '\0'; | |
850 | } | |
0baab86b | 851 | |
db6f8759 TH |
852 | static u64 ata_id_n_sectors(const u16 *id) |
853 | { | |
854 | if (ata_id_has_lba(id)) { | |
855 | if (ata_id_has_lba48(id)) | |
856 | return ata_id_u64(id, 100); | |
857 | else | |
858 | return ata_id_u32(id, 60); | |
859 | } else { | |
860 | if (ata_id_current_chs_valid(id)) | |
861 | return ata_id_u32(id, 57); | |
862 | else | |
863 | return id[1] * id[3] * id[6]; | |
864 | } | |
865 | } | |
866 | ||
1e999736 AC |
867 | static u64 ata_tf_to_lba48(struct ata_taskfile *tf) |
868 | { | |
869 | u64 sectors = 0; | |
870 | ||
871 | sectors |= ((u64)(tf->hob_lbah & 0xff)) << 40; | |
872 | sectors |= ((u64)(tf->hob_lbam & 0xff)) << 32; | |
873 | sectors |= (tf->hob_lbal & 0xff) << 24; | |
874 | sectors |= (tf->lbah & 0xff) << 16; | |
875 | sectors |= (tf->lbam & 0xff) << 8; | |
876 | sectors |= (tf->lbal & 0xff); | |
877 | ||
878 | return ++sectors; | |
879 | } | |
880 | ||
881 | static u64 ata_tf_to_lba(struct ata_taskfile *tf) | |
882 | { | |
883 | u64 sectors = 0; | |
884 | ||
885 | sectors |= (tf->device & 0x0f) << 24; | |
886 | sectors |= (tf->lbah & 0xff) << 16; | |
887 | sectors |= (tf->lbam & 0xff) << 8; | |
888 | sectors |= (tf->lbal & 0xff); | |
889 | ||
890 | return ++sectors; | |
891 | } | |
892 | ||
893 | /** | |
c728a914 TH |
894 | * ata_read_native_max_address - Read native max address |
895 | * @dev: target device | |
896 | * @max_sectors: out parameter for the result native max address | |
1e999736 | 897 | * |
c728a914 TH |
898 | * Perform an LBA48 or LBA28 native size query upon the device in |
899 | * question. | |
1e999736 | 900 | * |
c728a914 TH |
901 | * RETURNS: |
902 | * 0 on success, -EACCES if command is aborted by the drive. | |
903 | * -EIO on other errors. | |
1e999736 | 904 | */ |
c728a914 | 905 | static int ata_read_native_max_address(struct ata_device *dev, u64 *max_sectors) |
1e999736 | 906 | { |
c728a914 | 907 | unsigned int err_mask; |
1e999736 | 908 | struct ata_taskfile tf; |
c728a914 | 909 | int lba48 = ata_id_has_lba48(dev->id); |
1e999736 AC |
910 | |
911 | ata_tf_init(dev, &tf); | |
912 | ||
c728a914 | 913 | /* always clear all address registers */ |
1e999736 | 914 | tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; |
1e999736 | 915 | |
c728a914 TH |
916 | if (lba48) { |
917 | tf.command = ATA_CMD_READ_NATIVE_MAX_EXT; | |
918 | tf.flags |= ATA_TFLAG_LBA48; | |
919 | } else | |
920 | tf.command = ATA_CMD_READ_NATIVE_MAX; | |
1e999736 | 921 | |
1e999736 | 922 | tf.protocol |= ATA_PROT_NODATA; |
c728a914 TH |
923 | tf.device |= ATA_LBA; |
924 | ||
925 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0); | |
926 | if (err_mask) { | |
927 | ata_dev_printk(dev, KERN_WARNING, "failed to read native " | |
928 | "max address (err_mask=0x%x)\n", err_mask); | |
929 | if (err_mask == AC_ERR_DEV && (tf.feature & ATA_ABORTED)) | |
930 | return -EACCES; | |
931 | return -EIO; | |
932 | } | |
1e999736 | 933 | |
c728a914 TH |
934 | if (lba48) |
935 | *max_sectors = ata_tf_to_lba48(&tf); | |
936 | else | |
937 | *max_sectors = ata_tf_to_lba(&tf); | |
93328e11 AC |
938 | if (dev->horkage & ATA_HORKAGE_HPA_SIZE) |
939 | (*max_sectors)--; | |
c728a914 | 940 | return 0; |
1e999736 AC |
941 | } |
942 | ||
943 | /** | |
c728a914 TH |
944 | * ata_set_max_sectors - Set max sectors |
945 | * @dev: target device | |
6b38d1d1 | 946 | * @new_sectors: new max sectors value to set for the device |
1e999736 | 947 | * |
c728a914 TH |
948 | * Set max sectors of @dev to @new_sectors. |
949 | * | |
950 | * RETURNS: | |
951 | * 0 on success, -EACCES if command is aborted or denied (due to | |
952 | * previous non-volatile SET_MAX) by the drive. -EIO on other | |
953 | * errors. | |
1e999736 | 954 | */ |
05027adc | 955 | static int ata_set_max_sectors(struct ata_device *dev, u64 new_sectors) |
1e999736 | 956 | { |
c728a914 | 957 | unsigned int err_mask; |
1e999736 | 958 | struct ata_taskfile tf; |
c728a914 | 959 | int lba48 = ata_id_has_lba48(dev->id); |
1e999736 AC |
960 | |
961 | new_sectors--; | |
962 | ||
963 | ata_tf_init(dev, &tf); | |
964 | ||
1e999736 | 965 | tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; |
c728a914 TH |
966 | |
967 | if (lba48) { | |
968 | tf.command = ATA_CMD_SET_MAX_EXT; | |
969 | tf.flags |= ATA_TFLAG_LBA48; | |
970 | ||
971 | tf.hob_lbal = (new_sectors >> 24) & 0xff; | |
972 | tf.hob_lbam = (new_sectors >> 32) & 0xff; | |
973 | tf.hob_lbah = (new_sectors >> 40) & 0xff; | |
1e582ba4 | 974 | } else { |
c728a914 TH |
975 | tf.command = ATA_CMD_SET_MAX; |
976 | ||
1e582ba4 TH |
977 | tf.device |= (new_sectors >> 24) & 0xf; |
978 | } | |
979 | ||
1e999736 | 980 | tf.protocol |= ATA_PROT_NODATA; |
c728a914 | 981 | tf.device |= ATA_LBA; |
1e999736 AC |
982 | |
983 | tf.lbal = (new_sectors >> 0) & 0xff; | |
984 | tf.lbam = (new_sectors >> 8) & 0xff; | |
985 | tf.lbah = (new_sectors >> 16) & 0xff; | |
1e999736 | 986 | |
c728a914 TH |
987 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0); |
988 | if (err_mask) { | |
989 | ata_dev_printk(dev, KERN_WARNING, "failed to set " | |
990 | "max address (err_mask=0x%x)\n", err_mask); | |
991 | if (err_mask == AC_ERR_DEV && | |
992 | (tf.feature & (ATA_ABORTED | ATA_IDNF))) | |
993 | return -EACCES; | |
994 | return -EIO; | |
995 | } | |
996 | ||
c728a914 | 997 | return 0; |
1e999736 AC |
998 | } |
999 | ||
1000 | /** | |
1001 | * ata_hpa_resize - Resize a device with an HPA set | |
1002 | * @dev: Device to resize | |
1003 | * | |
1004 | * Read the size of an LBA28 or LBA48 disk with HPA features and resize | |
1005 | * it if required to the full size of the media. The caller must check | |
1006 | * the drive has the HPA feature set enabled. | |
05027adc TH |
1007 | * |
1008 | * RETURNS: | |
1009 | * 0 on success, -errno on failure. | |
1e999736 | 1010 | */ |
05027adc | 1011 | static int ata_hpa_resize(struct ata_device *dev) |
1e999736 | 1012 | { |
05027adc TH |
1013 | struct ata_eh_context *ehc = &dev->link->eh_context; |
1014 | int print_info = ehc->i.flags & ATA_EHI_PRINTINFO; | |
1015 | u64 sectors = ata_id_n_sectors(dev->id); | |
1016 | u64 native_sectors; | |
c728a914 | 1017 | int rc; |
a617c09f | 1018 | |
05027adc TH |
1019 | /* do we need to do it? */ |
1020 | if (dev->class != ATA_DEV_ATA || | |
1021 | !ata_id_has_lba(dev->id) || !ata_id_hpa_enabled(dev->id) || | |
1022 | (dev->horkage & ATA_HORKAGE_BROKEN_HPA)) | |
c728a914 | 1023 | return 0; |
1e999736 | 1024 | |
05027adc TH |
1025 | /* read native max address */ |
1026 | rc = ata_read_native_max_address(dev, &native_sectors); | |
1027 | if (rc) { | |
1028 | /* If HPA isn't going to be unlocked, skip HPA | |
1029 | * resizing from the next try. | |
1030 | */ | |
1031 | if (!ata_ignore_hpa) { | |
1032 | ata_dev_printk(dev, KERN_WARNING, "HPA support seems " | |
1033 | "broken, will skip HPA handling\n"); | |
1034 | dev->horkage |= ATA_HORKAGE_BROKEN_HPA; | |
1035 | ||
1036 | /* we can continue if device aborted the command */ | |
1037 | if (rc == -EACCES) | |
1038 | rc = 0; | |
1e999736 | 1039 | } |
37301a55 | 1040 | |
05027adc TH |
1041 | return rc; |
1042 | } | |
1043 | ||
1044 | /* nothing to do? */ | |
1045 | if (native_sectors <= sectors || !ata_ignore_hpa) { | |
1046 | if (!print_info || native_sectors == sectors) | |
1047 | return 0; | |
1048 | ||
1049 | if (native_sectors > sectors) | |
1050 | ata_dev_printk(dev, KERN_INFO, | |
1051 | "HPA detected: current %llu, native %llu\n", | |
1052 | (unsigned long long)sectors, | |
1053 | (unsigned long long)native_sectors); | |
1054 | else if (native_sectors < sectors) | |
1055 | ata_dev_printk(dev, KERN_WARNING, | |
1056 | "native sectors (%llu) is smaller than " | |
1057 | "sectors (%llu)\n", | |
1058 | (unsigned long long)native_sectors, | |
1059 | (unsigned long long)sectors); | |
1060 | return 0; | |
1061 | } | |
1062 | ||
1063 | /* let's unlock HPA */ | |
1064 | rc = ata_set_max_sectors(dev, native_sectors); | |
1065 | if (rc == -EACCES) { | |
1066 | /* if device aborted the command, skip HPA resizing */ | |
1067 | ata_dev_printk(dev, KERN_WARNING, "device aborted resize " | |
1068 | "(%llu -> %llu), skipping HPA handling\n", | |
1069 | (unsigned long long)sectors, | |
1070 | (unsigned long long)native_sectors); | |
1071 | dev->horkage |= ATA_HORKAGE_BROKEN_HPA; | |
1072 | return 0; | |
1073 | } else if (rc) | |
1074 | return rc; | |
1075 | ||
1076 | /* re-read IDENTIFY data */ | |
1077 | rc = ata_dev_reread_id(dev, 0); | |
1078 | if (rc) { | |
1079 | ata_dev_printk(dev, KERN_ERR, "failed to re-read IDENTIFY " | |
1080 | "data after HPA resizing\n"); | |
1081 | return rc; | |
1082 | } | |
1083 | ||
1084 | if (print_info) { | |
1085 | u64 new_sectors = ata_id_n_sectors(dev->id); | |
1086 | ata_dev_printk(dev, KERN_INFO, | |
1087 | "HPA unlocked: %llu -> %llu, native %llu\n", | |
1088 | (unsigned long long)sectors, | |
1089 | (unsigned long long)new_sectors, | |
1090 | (unsigned long long)native_sectors); | |
1091 | } | |
1092 | ||
1093 | return 0; | |
1e999736 AC |
1094 | } |
1095 | ||
10305f0f A |
1096 | /** |
1097 | * ata_id_to_dma_mode - Identify DMA mode from id block | |
1098 | * @dev: device to identify | |
cc261267 | 1099 | * @unknown: mode to assume if we cannot tell |
10305f0f A |
1100 | * |
1101 | * Set up the timing values for the device based upon the identify | |
1102 | * reported values for the DMA mode. This function is used by drivers | |
1103 | * which rely upon firmware configured modes, but wish to report the | |
1104 | * mode correctly when possible. | |
1105 | * | |
1106 | * In addition we emit similarly formatted messages to the default | |
1107 | * ata_dev_set_mode handler, in order to provide consistency of | |
1108 | * presentation. | |
1109 | */ | |
1110 | ||
1111 | void ata_id_to_dma_mode(struct ata_device *dev, u8 unknown) | |
1112 | { | |
1113 | unsigned int mask; | |
1114 | u8 mode; | |
1115 | ||
1116 | /* Pack the DMA modes */ | |
1117 | mask = ((dev->id[63] >> 8) << ATA_SHIFT_MWDMA) & ATA_MASK_MWDMA; | |
1118 | if (dev->id[53] & 0x04) | |
1119 | mask |= ((dev->id[88] >> 8) << ATA_SHIFT_UDMA) & ATA_MASK_UDMA; | |
1120 | ||
1121 | /* Select the mode in use */ | |
1122 | mode = ata_xfer_mask2mode(mask); | |
1123 | ||
1124 | if (mode != 0) { | |
1125 | ata_dev_printk(dev, KERN_INFO, "configured for %s\n", | |
1126 | ata_mode_string(mask)); | |
1127 | } else { | |
1128 | /* SWDMA perhaps ? */ | |
1129 | mode = unknown; | |
1130 | ata_dev_printk(dev, KERN_INFO, "configured for DMA\n"); | |
1131 | } | |
1132 | ||
1133 | /* Configure the device reporting */ | |
1134 | dev->xfer_mode = mode; | |
1135 | dev->xfer_shift = ata_xfer_mode2shift(mode); | |
1136 | } | |
1137 | ||
0baab86b EF |
1138 | /** |
1139 | * ata_noop_dev_select - Select device 0/1 on ATA bus | |
1140 | * @ap: ATA channel to manipulate | |
1141 | * @device: ATA device (numbered from zero) to select | |
1142 | * | |
1143 | * This function performs no actual function. | |
1144 | * | |
1145 | * May be used as the dev_select() entry in ata_port_operations. | |
1146 | * | |
1147 | * LOCKING: | |
1148 | * caller. | |
1149 | */ | |
1da177e4 LT |
1150 | void ata_noop_dev_select (struct ata_port *ap, unsigned int device) |
1151 | { | |
1152 | } | |
1153 | ||
0baab86b | 1154 | |
1da177e4 LT |
1155 | /** |
1156 | * ata_std_dev_select - Select device 0/1 on ATA bus | |
1157 | * @ap: ATA channel to manipulate | |
1158 | * @device: ATA device (numbered from zero) to select | |
1159 | * | |
1160 | * Use the method defined in the ATA specification to | |
1161 | * make either device 0, or device 1, active on the | |
0baab86b EF |
1162 | * ATA channel. Works with both PIO and MMIO. |
1163 | * | |
1164 | * May be used as the dev_select() entry in ata_port_operations. | |
1da177e4 LT |
1165 | * |
1166 | * LOCKING: | |
1167 | * caller. | |
1168 | */ | |
1169 | ||
1170 | void ata_std_dev_select (struct ata_port *ap, unsigned int device) | |
1171 | { | |
1172 | u8 tmp; | |
1173 | ||
1174 | if (device == 0) | |
1175 | tmp = ATA_DEVICE_OBS; | |
1176 | else | |
1177 | tmp = ATA_DEVICE_OBS | ATA_DEV1; | |
1178 | ||
0d5ff566 | 1179 | iowrite8(tmp, ap->ioaddr.device_addr); |
1da177e4 LT |
1180 | ata_pause(ap); /* needed; also flushes, for mmio */ |
1181 | } | |
1182 | ||
1183 | /** | |
1184 | * ata_dev_select - Select device 0/1 on ATA bus | |
1185 | * @ap: ATA channel to manipulate | |
1186 | * @device: ATA device (numbered from zero) to select | |
1187 | * @wait: non-zero to wait for Status register BSY bit to clear | |
1188 | * @can_sleep: non-zero if context allows sleeping | |
1189 | * | |
1190 | * Use the method defined in the ATA specification to | |
1191 | * make either device 0, or device 1, active on the | |
1192 | * ATA channel. | |
1193 | * | |
1194 | * This is a high-level version of ata_std_dev_select(), | |
1195 | * which additionally provides the services of inserting | |
1196 | * the proper pauses and status polling, where needed. | |
1197 | * | |
1198 | * LOCKING: | |
1199 | * caller. | |
1200 | */ | |
1201 | ||
1202 | void ata_dev_select(struct ata_port *ap, unsigned int device, | |
1203 | unsigned int wait, unsigned int can_sleep) | |
1204 | { | |
88574551 | 1205 | if (ata_msg_probe(ap)) |
44877b4e TH |
1206 | ata_port_printk(ap, KERN_INFO, "ata_dev_select: ENTER, " |
1207 | "device %u, wait %u\n", device, wait); | |
1da177e4 LT |
1208 | |
1209 | if (wait) | |
1210 | ata_wait_idle(ap); | |
1211 | ||
1212 | ap->ops->dev_select(ap, device); | |
1213 | ||
1214 | if (wait) { | |
9af5c9c9 | 1215 | if (can_sleep && ap->link.device[device].class == ATA_DEV_ATAPI) |
1da177e4 LT |
1216 | msleep(150); |
1217 | ata_wait_idle(ap); | |
1218 | } | |
1219 | } | |
1220 | ||
1221 | /** | |
1222 | * ata_dump_id - IDENTIFY DEVICE info debugging output | |
0bd3300a | 1223 | * @id: IDENTIFY DEVICE page to dump |
1da177e4 | 1224 | * |
0bd3300a TH |
1225 | * Dump selected 16-bit words from the given IDENTIFY DEVICE |
1226 | * page. | |
1da177e4 LT |
1227 | * |
1228 | * LOCKING: | |
1229 | * caller. | |
1230 | */ | |
1231 | ||
0bd3300a | 1232 | static inline void ata_dump_id(const u16 *id) |
1da177e4 LT |
1233 | { |
1234 | DPRINTK("49==0x%04x " | |
1235 | "53==0x%04x " | |
1236 | "63==0x%04x " | |
1237 | "64==0x%04x " | |
1238 | "75==0x%04x \n", | |
0bd3300a TH |
1239 | id[49], |
1240 | id[53], | |
1241 | id[63], | |
1242 | id[64], | |
1243 | id[75]); | |
1da177e4 LT |
1244 | DPRINTK("80==0x%04x " |
1245 | "81==0x%04x " | |
1246 | "82==0x%04x " | |
1247 | "83==0x%04x " | |
1248 | "84==0x%04x \n", | |
0bd3300a TH |
1249 | id[80], |
1250 | id[81], | |
1251 | id[82], | |
1252 | id[83], | |
1253 | id[84]); | |
1da177e4 LT |
1254 | DPRINTK("88==0x%04x " |
1255 | "93==0x%04x\n", | |
0bd3300a TH |
1256 | id[88], |
1257 | id[93]); | |
1da177e4 LT |
1258 | } |
1259 | ||
cb95d562 TH |
1260 | /** |
1261 | * ata_id_xfermask - Compute xfermask from the given IDENTIFY data | |
1262 | * @id: IDENTIFY data to compute xfer mask from | |
1263 | * | |
1264 | * Compute the xfermask for this device. This is not as trivial | |
1265 | * as it seems if we must consider early devices correctly. | |
1266 | * | |
1267 | * FIXME: pre IDE drive timing (do we care ?). | |
1268 | * | |
1269 | * LOCKING: | |
1270 | * None. | |
1271 | * | |
1272 | * RETURNS: | |
1273 | * Computed xfermask | |
1274 | */ | |
1275 | static unsigned int ata_id_xfermask(const u16 *id) | |
1276 | { | |
1277 | unsigned int pio_mask, mwdma_mask, udma_mask; | |
1278 | ||
1279 | /* Usual case. Word 53 indicates word 64 is valid */ | |
1280 | if (id[ATA_ID_FIELD_VALID] & (1 << 1)) { | |
1281 | pio_mask = id[ATA_ID_PIO_MODES] & 0x03; | |
1282 | pio_mask <<= 3; | |
1283 | pio_mask |= 0x7; | |
1284 | } else { | |
1285 | /* If word 64 isn't valid then Word 51 high byte holds | |
1286 | * the PIO timing number for the maximum. Turn it into | |
1287 | * a mask. | |
1288 | */ | |
7a0f1c8a | 1289 | u8 mode = (id[ATA_ID_OLD_PIO_MODES] >> 8) & 0xFF; |
46767aeb AC |
1290 | if (mode < 5) /* Valid PIO range */ |
1291 | pio_mask = (2 << mode) - 1; | |
1292 | else | |
1293 | pio_mask = 1; | |
cb95d562 TH |
1294 | |
1295 | /* But wait.. there's more. Design your standards by | |
1296 | * committee and you too can get a free iordy field to | |
1297 | * process. However its the speeds not the modes that | |
1298 | * are supported... Note drivers using the timing API | |
1299 | * will get this right anyway | |
1300 | */ | |
1301 | } | |
1302 | ||
1303 | mwdma_mask = id[ATA_ID_MWDMA_MODES] & 0x07; | |
fb21f0d0 | 1304 | |
b352e57d AC |
1305 | if (ata_id_is_cfa(id)) { |
1306 | /* | |
1307 | * Process compact flash extended modes | |
1308 | */ | |
1309 | int pio = id[163] & 0x7; | |
1310 | int dma = (id[163] >> 3) & 7; | |
1311 | ||
1312 | if (pio) | |
1313 | pio_mask |= (1 << 5); | |
1314 | if (pio > 1) | |
1315 | pio_mask |= (1 << 6); | |
1316 | if (dma) | |
1317 | mwdma_mask |= (1 << 3); | |
1318 | if (dma > 1) | |
1319 | mwdma_mask |= (1 << 4); | |
1320 | } | |
1321 | ||
fb21f0d0 TH |
1322 | udma_mask = 0; |
1323 | if (id[ATA_ID_FIELD_VALID] & (1 << 2)) | |
1324 | udma_mask = id[ATA_ID_UDMA_MODES] & 0xff; | |
cb95d562 TH |
1325 | |
1326 | return ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask); | |
1327 | } | |
1328 | ||
86e45b6b TH |
1329 | /** |
1330 | * ata_port_queue_task - Queue port_task | |
1331 | * @ap: The ata_port to queue port_task for | |
e2a7f77a | 1332 | * @fn: workqueue function to be scheduled |
65f27f38 | 1333 | * @data: data for @fn to use |
e2a7f77a | 1334 | * @delay: delay time for workqueue function |
86e45b6b TH |
1335 | * |
1336 | * Schedule @fn(@data) for execution after @delay jiffies using | |
1337 | * port_task. There is one port_task per port and it's the | |
1338 | * user(low level driver)'s responsibility to make sure that only | |
1339 | * one task is active at any given time. | |
1340 | * | |
1341 | * libata core layer takes care of synchronization between | |
1342 | * port_task and EH. ata_port_queue_task() may be ignored for EH | |
1343 | * synchronization. | |
1344 | * | |
1345 | * LOCKING: | |
1346 | * Inherited from caller. | |
1347 | */ | |
65f27f38 | 1348 | void ata_port_queue_task(struct ata_port *ap, work_func_t fn, void *data, |
86e45b6b TH |
1349 | unsigned long delay) |
1350 | { | |
65f27f38 DH |
1351 | PREPARE_DELAYED_WORK(&ap->port_task, fn); |
1352 | ap->port_task_data = data; | |
86e45b6b | 1353 | |
45a66c1c ON |
1354 | /* may fail if ata_port_flush_task() in progress */ |
1355 | queue_delayed_work(ata_wq, &ap->port_task, delay); | |
86e45b6b TH |
1356 | } |
1357 | ||
1358 | /** | |
1359 | * ata_port_flush_task - Flush port_task | |
1360 | * @ap: The ata_port to flush port_task for | |
1361 | * | |
1362 | * After this function completes, port_task is guranteed not to | |
1363 | * be running or scheduled. | |
1364 | * | |
1365 | * LOCKING: | |
1366 | * Kernel thread context (may sleep) | |
1367 | */ | |
1368 | void ata_port_flush_task(struct ata_port *ap) | |
1369 | { | |
86e45b6b TH |
1370 | DPRINTK("ENTER\n"); |
1371 | ||
45a66c1c | 1372 | cancel_rearming_delayed_work(&ap->port_task); |
86e45b6b | 1373 | |
0dd4b21f BP |
1374 | if (ata_msg_ctl(ap)) |
1375 | ata_port_printk(ap, KERN_DEBUG, "%s: EXIT\n", __FUNCTION__); | |
86e45b6b TH |
1376 | } |
1377 | ||
7102d230 | 1378 | static void ata_qc_complete_internal(struct ata_queued_cmd *qc) |
a2a7a662 | 1379 | { |
77853bf2 | 1380 | struct completion *waiting = qc->private_data; |
a2a7a662 | 1381 | |
a2a7a662 | 1382 | complete(waiting); |
a2a7a662 TH |
1383 | } |
1384 | ||
1385 | /** | |
2432697b | 1386 | * ata_exec_internal_sg - execute libata internal command |
a2a7a662 TH |
1387 | * @dev: Device to which the command is sent |
1388 | * @tf: Taskfile registers for the command and the result | |
d69cf37d | 1389 | * @cdb: CDB for packet command |
a2a7a662 | 1390 | * @dma_dir: Data tranfer direction of the command |
2432697b TH |
1391 | * @sg: sg list for the data buffer of the command |
1392 | * @n_elem: Number of sg entries | |
a2a7a662 TH |
1393 | * |
1394 | * Executes libata internal command with timeout. @tf contains | |
1395 | * command on entry and result on return. Timeout and error | |
1396 | * conditions are reported via return value. No recovery action | |
1397 | * is taken after a command times out. It's caller's duty to | |
1398 | * clean up after timeout. | |
1399 | * | |
1400 | * LOCKING: | |
1401 | * None. Should be called with kernel context, might sleep. | |
551e8889 TH |
1402 | * |
1403 | * RETURNS: | |
1404 | * Zero on success, AC_ERR_* mask on failure | |
a2a7a662 | 1405 | */ |
2432697b TH |
1406 | unsigned ata_exec_internal_sg(struct ata_device *dev, |
1407 | struct ata_taskfile *tf, const u8 *cdb, | |
1408 | int dma_dir, struct scatterlist *sg, | |
1409 | unsigned int n_elem) | |
a2a7a662 | 1410 | { |
9af5c9c9 TH |
1411 | struct ata_link *link = dev->link; |
1412 | struct ata_port *ap = link->ap; | |
a2a7a662 TH |
1413 | u8 command = tf->command; |
1414 | struct ata_queued_cmd *qc; | |
2ab7db1f | 1415 | unsigned int tag, preempted_tag; |
dedaf2b0 | 1416 | u32 preempted_sactive, preempted_qc_active; |
da917d69 | 1417 | int preempted_nr_active_links; |
60be6b9a | 1418 | DECLARE_COMPLETION_ONSTACK(wait); |
a2a7a662 | 1419 | unsigned long flags; |
77853bf2 | 1420 | unsigned int err_mask; |
d95a717f | 1421 | int rc; |
a2a7a662 | 1422 | |
ba6a1308 | 1423 | spin_lock_irqsave(ap->lock, flags); |
a2a7a662 | 1424 | |
e3180499 | 1425 | /* no internal command while frozen */ |
b51e9e5d | 1426 | if (ap->pflags & ATA_PFLAG_FROZEN) { |
ba6a1308 | 1427 | spin_unlock_irqrestore(ap->lock, flags); |
e3180499 TH |
1428 | return AC_ERR_SYSTEM; |
1429 | } | |
1430 | ||
2ab7db1f | 1431 | /* initialize internal qc */ |
a2a7a662 | 1432 | |
2ab7db1f TH |
1433 | /* XXX: Tag 0 is used for drivers with legacy EH as some |
1434 | * drivers choke if any other tag is given. This breaks | |
1435 | * ata_tag_internal() test for those drivers. Don't use new | |
1436 | * EH stuff without converting to it. | |
1437 | */ | |
1438 | if (ap->ops->error_handler) | |
1439 | tag = ATA_TAG_INTERNAL; | |
1440 | else | |
1441 | tag = 0; | |
1442 | ||
6cec4a39 | 1443 | if (test_and_set_bit(tag, &ap->qc_allocated)) |
2ab7db1f | 1444 | BUG(); |
f69499f4 | 1445 | qc = __ata_qc_from_tag(ap, tag); |
2ab7db1f TH |
1446 | |
1447 | qc->tag = tag; | |
1448 | qc->scsicmd = NULL; | |
1449 | qc->ap = ap; | |
1450 | qc->dev = dev; | |
1451 | ata_qc_reinit(qc); | |
1452 | ||
9af5c9c9 TH |
1453 | preempted_tag = link->active_tag; |
1454 | preempted_sactive = link->sactive; | |
dedaf2b0 | 1455 | preempted_qc_active = ap->qc_active; |
da917d69 | 1456 | preempted_nr_active_links = ap->nr_active_links; |
9af5c9c9 TH |
1457 | link->active_tag = ATA_TAG_POISON; |
1458 | link->sactive = 0; | |
dedaf2b0 | 1459 | ap->qc_active = 0; |
da917d69 | 1460 | ap->nr_active_links = 0; |
2ab7db1f TH |
1461 | |
1462 | /* prepare & issue qc */ | |
a2a7a662 | 1463 | qc->tf = *tf; |
d69cf37d TH |
1464 | if (cdb) |
1465 | memcpy(qc->cdb, cdb, ATAPI_CDB_LEN); | |
e61e0672 | 1466 | qc->flags |= ATA_QCFLAG_RESULT_TF; |
a2a7a662 TH |
1467 | qc->dma_dir = dma_dir; |
1468 | if (dma_dir != DMA_NONE) { | |
2432697b TH |
1469 | unsigned int i, buflen = 0; |
1470 | ||
1471 | for (i = 0; i < n_elem; i++) | |
1472 | buflen += sg[i].length; | |
1473 | ||
1474 | ata_sg_init(qc, sg, n_elem); | |
49c80429 | 1475 | qc->nbytes = buflen; |
a2a7a662 TH |
1476 | } |
1477 | ||
77853bf2 | 1478 | qc->private_data = &wait; |
a2a7a662 TH |
1479 | qc->complete_fn = ata_qc_complete_internal; |
1480 | ||
8e0e694a | 1481 | ata_qc_issue(qc); |
a2a7a662 | 1482 | |
ba6a1308 | 1483 | spin_unlock_irqrestore(ap->lock, flags); |
a2a7a662 | 1484 | |
a8601e5f | 1485 | rc = wait_for_completion_timeout(&wait, ata_probe_timeout); |
d95a717f TH |
1486 | |
1487 | ata_port_flush_task(ap); | |
41ade50c | 1488 | |
d95a717f | 1489 | if (!rc) { |
ba6a1308 | 1490 | spin_lock_irqsave(ap->lock, flags); |
a2a7a662 TH |
1491 | |
1492 | /* We're racing with irq here. If we lose, the | |
1493 | * following test prevents us from completing the qc | |
d95a717f TH |
1494 | * twice. If we win, the port is frozen and will be |
1495 | * cleaned up by ->post_internal_cmd(). | |
a2a7a662 | 1496 | */ |
77853bf2 | 1497 | if (qc->flags & ATA_QCFLAG_ACTIVE) { |
d95a717f TH |
1498 | qc->err_mask |= AC_ERR_TIMEOUT; |
1499 | ||
1500 | if (ap->ops->error_handler) | |
1501 | ata_port_freeze(ap); | |
1502 | else | |
1503 | ata_qc_complete(qc); | |
f15a1daf | 1504 | |
0dd4b21f BP |
1505 | if (ata_msg_warn(ap)) |
1506 | ata_dev_printk(dev, KERN_WARNING, | |
88574551 | 1507 | "qc timeout (cmd 0x%x)\n", command); |
a2a7a662 TH |
1508 | } |
1509 | ||
ba6a1308 | 1510 | spin_unlock_irqrestore(ap->lock, flags); |
a2a7a662 TH |
1511 | } |
1512 | ||
d95a717f TH |
1513 | /* do post_internal_cmd */ |
1514 | if (ap->ops->post_internal_cmd) | |
1515 | ap->ops->post_internal_cmd(qc); | |
1516 | ||
a51d644a TH |
1517 | /* perform minimal error analysis */ |
1518 | if (qc->flags & ATA_QCFLAG_FAILED) { | |
1519 | if (qc->result_tf.command & (ATA_ERR | ATA_DF)) | |
1520 | qc->err_mask |= AC_ERR_DEV; | |
1521 | ||
1522 | if (!qc->err_mask) | |
1523 | qc->err_mask |= AC_ERR_OTHER; | |
1524 | ||
1525 | if (qc->err_mask & ~AC_ERR_OTHER) | |
1526 | qc->err_mask &= ~AC_ERR_OTHER; | |
d95a717f TH |
1527 | } |
1528 | ||
15869303 | 1529 | /* finish up */ |
ba6a1308 | 1530 | spin_lock_irqsave(ap->lock, flags); |
15869303 | 1531 | |
e61e0672 | 1532 | *tf = qc->result_tf; |
77853bf2 TH |
1533 | err_mask = qc->err_mask; |
1534 | ||
1535 | ata_qc_free(qc); | |
9af5c9c9 TH |
1536 | link->active_tag = preempted_tag; |
1537 | link->sactive = preempted_sactive; | |
dedaf2b0 | 1538 | ap->qc_active = preempted_qc_active; |
da917d69 | 1539 | ap->nr_active_links = preempted_nr_active_links; |
77853bf2 | 1540 | |
1f7dd3e9 TH |
1541 | /* XXX - Some LLDDs (sata_mv) disable port on command failure. |
1542 | * Until those drivers are fixed, we detect the condition | |
1543 | * here, fail the command with AC_ERR_SYSTEM and reenable the | |
1544 | * port. | |
1545 | * | |
1546 | * Note that this doesn't change any behavior as internal | |
1547 | * command failure results in disabling the device in the | |
1548 | * higher layer for LLDDs without new reset/EH callbacks. | |
1549 | * | |
1550 | * Kill the following code as soon as those drivers are fixed. | |
1551 | */ | |
198e0fed | 1552 | if (ap->flags & ATA_FLAG_DISABLED) { |
1f7dd3e9 TH |
1553 | err_mask |= AC_ERR_SYSTEM; |
1554 | ata_port_probe(ap); | |
1555 | } | |
1556 | ||
ba6a1308 | 1557 | spin_unlock_irqrestore(ap->lock, flags); |
15869303 | 1558 | |
77853bf2 | 1559 | return err_mask; |
a2a7a662 TH |
1560 | } |
1561 | ||
2432697b | 1562 | /** |
33480a0e | 1563 | * ata_exec_internal - execute libata internal command |
2432697b TH |
1564 | * @dev: Device to which the command is sent |
1565 | * @tf: Taskfile registers for the command and the result | |
1566 | * @cdb: CDB for packet command | |
1567 | * @dma_dir: Data tranfer direction of the command | |
1568 | * @buf: Data buffer of the command | |
1569 | * @buflen: Length of data buffer | |
1570 | * | |
1571 | * Wrapper around ata_exec_internal_sg() which takes simple | |
1572 | * buffer instead of sg list. | |
1573 | * | |
1574 | * LOCKING: | |
1575 | * None. Should be called with kernel context, might sleep. | |
1576 | * | |
1577 | * RETURNS: | |
1578 | * Zero on success, AC_ERR_* mask on failure | |
1579 | */ | |
1580 | unsigned ata_exec_internal(struct ata_device *dev, | |
1581 | struct ata_taskfile *tf, const u8 *cdb, | |
1582 | int dma_dir, void *buf, unsigned int buflen) | |
1583 | { | |
33480a0e TH |
1584 | struct scatterlist *psg = NULL, sg; |
1585 | unsigned int n_elem = 0; | |
2432697b | 1586 | |
33480a0e TH |
1587 | if (dma_dir != DMA_NONE) { |
1588 | WARN_ON(!buf); | |
1589 | sg_init_one(&sg, buf, buflen); | |
1590 | psg = &sg; | |
1591 | n_elem++; | |
1592 | } | |
2432697b | 1593 | |
33480a0e | 1594 | return ata_exec_internal_sg(dev, tf, cdb, dma_dir, psg, n_elem); |
2432697b TH |
1595 | } |
1596 | ||
977e6b9f TH |
1597 | /** |
1598 | * ata_do_simple_cmd - execute simple internal command | |
1599 | * @dev: Device to which the command is sent | |
1600 | * @cmd: Opcode to execute | |
1601 | * | |
1602 | * Execute a 'simple' command, that only consists of the opcode | |
1603 | * 'cmd' itself, without filling any other registers | |
1604 | * | |
1605 | * LOCKING: | |
1606 | * Kernel thread context (may sleep). | |
1607 | * | |
1608 | * RETURNS: | |
1609 | * Zero on success, AC_ERR_* mask on failure | |
e58eb583 | 1610 | */ |
77b08fb5 | 1611 | unsigned int ata_do_simple_cmd(struct ata_device *dev, u8 cmd) |
e58eb583 TH |
1612 | { |
1613 | struct ata_taskfile tf; | |
e58eb583 TH |
1614 | |
1615 | ata_tf_init(dev, &tf); | |
1616 | ||
1617 | tf.command = cmd; | |
1618 | tf.flags |= ATA_TFLAG_DEVICE; | |
1619 | tf.protocol = ATA_PROT_NODATA; | |
1620 | ||
977e6b9f | 1621 | return ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0); |
e58eb583 TH |
1622 | } |
1623 | ||
1bc4ccff AC |
1624 | /** |
1625 | * ata_pio_need_iordy - check if iordy needed | |
1626 | * @adev: ATA device | |
1627 | * | |
1628 | * Check if the current speed of the device requires IORDY. Used | |
1629 | * by various controllers for chip configuration. | |
1630 | */ | |
a617c09f | 1631 | |
1bc4ccff AC |
1632 | unsigned int ata_pio_need_iordy(const struct ata_device *adev) |
1633 | { | |
432729f0 AC |
1634 | /* Controller doesn't support IORDY. Probably a pointless check |
1635 | as the caller should know this */ | |
9af5c9c9 | 1636 | if (adev->link->ap->flags & ATA_FLAG_NO_IORDY) |
1bc4ccff | 1637 | return 0; |
432729f0 AC |
1638 | /* PIO3 and higher it is mandatory */ |
1639 | if (adev->pio_mode > XFER_PIO_2) | |
1640 | return 1; | |
1641 | /* We turn it on when possible */ | |
1642 | if (ata_id_has_iordy(adev->id)) | |
1bc4ccff | 1643 | return 1; |
432729f0 AC |
1644 | return 0; |
1645 | } | |
2e9edbf8 | 1646 | |
432729f0 AC |
1647 | /** |
1648 | * ata_pio_mask_no_iordy - Return the non IORDY mask | |
1649 | * @adev: ATA device | |
1650 | * | |
1651 | * Compute the highest mode possible if we are not using iordy. Return | |
1652 | * -1 if no iordy mode is available. | |
1653 | */ | |
a617c09f | 1654 | |
432729f0 AC |
1655 | static u32 ata_pio_mask_no_iordy(const struct ata_device *adev) |
1656 | { | |
1bc4ccff | 1657 | /* If we have no drive specific rule, then PIO 2 is non IORDY */ |
1bc4ccff | 1658 | if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE */ |
432729f0 | 1659 | u16 pio = adev->id[ATA_ID_EIDE_PIO]; |
1bc4ccff AC |
1660 | /* Is the speed faster than the drive allows non IORDY ? */ |
1661 | if (pio) { | |
1662 | /* This is cycle times not frequency - watch the logic! */ | |
1663 | if (pio > 240) /* PIO2 is 240nS per cycle */ | |
432729f0 AC |
1664 | return 3 << ATA_SHIFT_PIO; |
1665 | return 7 << ATA_SHIFT_PIO; | |
1bc4ccff AC |
1666 | } |
1667 | } | |
432729f0 | 1668 | return 3 << ATA_SHIFT_PIO; |
1bc4ccff AC |
1669 | } |
1670 | ||
1da177e4 | 1671 | /** |
49016aca | 1672 | * ata_dev_read_id - Read ID data from the specified device |
49016aca TH |
1673 | * @dev: target device |
1674 | * @p_class: pointer to class of the target device (may be changed) | |
bff04647 | 1675 | * @flags: ATA_READID_* flags |
fe635c7e | 1676 | * @id: buffer to read IDENTIFY data into |
1da177e4 | 1677 | * |
49016aca TH |
1678 | * Read ID data from the specified device. ATA_CMD_ID_ATA is |
1679 | * performed on ATA devices and ATA_CMD_ID_ATAPI on ATAPI | |
aec5c3c1 TH |
1680 | * devices. This function also issues ATA_CMD_INIT_DEV_PARAMS |
1681 | * for pre-ATA4 drives. | |
1da177e4 | 1682 | * |
50a99018 AC |
1683 | * FIXME: ATA_CMD_ID_ATA is optional for early drives and right |
1684 | * now we abort if we hit that case. | |
1685 | * | |
1da177e4 | 1686 | * LOCKING: |
49016aca TH |
1687 | * Kernel thread context (may sleep) |
1688 | * | |
1689 | * RETURNS: | |
1690 | * 0 on success, -errno otherwise. | |
1da177e4 | 1691 | */ |
a9beec95 | 1692 | int ata_dev_read_id(struct ata_device *dev, unsigned int *p_class, |
bff04647 | 1693 | unsigned int flags, u16 *id) |
1da177e4 | 1694 | { |
9af5c9c9 | 1695 | struct ata_port *ap = dev->link->ap; |
49016aca | 1696 | unsigned int class = *p_class; |
a0123703 | 1697 | struct ata_taskfile tf; |
49016aca TH |
1698 | unsigned int err_mask = 0; |
1699 | const char *reason; | |
54936f8b | 1700 | int may_fallback = 1, tried_spinup = 0; |
49016aca | 1701 | int rc; |
1da177e4 | 1702 | |
0dd4b21f | 1703 | if (ata_msg_ctl(ap)) |
44877b4e | 1704 | ata_dev_printk(dev, KERN_DEBUG, "%s: ENTER\n", __FUNCTION__); |
1da177e4 | 1705 | |
49016aca | 1706 | ata_dev_select(ap, dev->devno, 1, 1); /* select device 0/1 */ |
49016aca | 1707 | retry: |
3373efd8 | 1708 | ata_tf_init(dev, &tf); |
a0123703 | 1709 | |
49016aca TH |
1710 | switch (class) { |
1711 | case ATA_DEV_ATA: | |
a0123703 | 1712 | tf.command = ATA_CMD_ID_ATA; |
49016aca TH |
1713 | break; |
1714 | case ATA_DEV_ATAPI: | |
a0123703 | 1715 | tf.command = ATA_CMD_ID_ATAPI; |
49016aca TH |
1716 | break; |
1717 | default: | |
1718 | rc = -ENODEV; | |
1719 | reason = "unsupported class"; | |
1720 | goto err_out; | |
1da177e4 LT |
1721 | } |
1722 | ||
a0123703 | 1723 | tf.protocol = ATA_PROT_PIO; |
81afe893 TH |
1724 | |
1725 | /* Some devices choke if TF registers contain garbage. Make | |
1726 | * sure those are properly initialized. | |
1727 | */ | |
1728 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
1729 | ||
1730 | /* Device presence detection is unreliable on some | |
1731 | * controllers. Always poll IDENTIFY if available. | |
1732 | */ | |
1733 | tf.flags |= ATA_TFLAG_POLLING; | |
1da177e4 | 1734 | |
3373efd8 | 1735 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_FROM_DEVICE, |
49016aca | 1736 | id, sizeof(id[0]) * ATA_ID_WORDS); |
a0123703 | 1737 | if (err_mask) { |
800b3996 | 1738 | if (err_mask & AC_ERR_NODEV_HINT) { |
55a8e2c8 | 1739 | DPRINTK("ata%u.%d: NODEV after polling detection\n", |
44877b4e | 1740 | ap->print_id, dev->devno); |
55a8e2c8 TH |
1741 | return -ENOENT; |
1742 | } | |
1743 | ||
54936f8b TH |
1744 | /* Device or controller might have reported the wrong |
1745 | * device class. Give a shot at the other IDENTIFY if | |
1746 | * the current one is aborted by the device. | |
1747 | */ | |
1748 | if (may_fallback && | |
1749 | (err_mask == AC_ERR_DEV) && (tf.feature & ATA_ABORTED)) { | |
1750 | may_fallback = 0; | |
1751 | ||
1752 | if (class == ATA_DEV_ATA) | |
1753 | class = ATA_DEV_ATAPI; | |
1754 | else | |
1755 | class = ATA_DEV_ATA; | |
1756 | goto retry; | |
1757 | } | |
1758 | ||
49016aca TH |
1759 | rc = -EIO; |
1760 | reason = "I/O error"; | |
1da177e4 LT |
1761 | goto err_out; |
1762 | } | |
1763 | ||
54936f8b TH |
1764 | /* Falling back doesn't make sense if ID data was read |
1765 | * successfully at least once. | |
1766 | */ | |
1767 | may_fallback = 0; | |
1768 | ||
49016aca | 1769 | swap_buf_le16(id, ATA_ID_WORDS); |
1da177e4 | 1770 | |
49016aca | 1771 | /* sanity check */ |
a4f5749b | 1772 | rc = -EINVAL; |
6070068b | 1773 | reason = "device reports invalid type"; |
a4f5749b TH |
1774 | |
1775 | if (class == ATA_DEV_ATA) { | |
1776 | if (!ata_id_is_ata(id) && !ata_id_is_cfa(id)) | |
1777 | goto err_out; | |
1778 | } else { | |
1779 | if (ata_id_is_ata(id)) | |
1780 | goto err_out; | |
49016aca TH |
1781 | } |
1782 | ||
169439c2 ML |
1783 | if (!tried_spinup && (id[2] == 0x37c8 || id[2] == 0x738c)) { |
1784 | tried_spinup = 1; | |
1785 | /* | |
1786 | * Drive powered-up in standby mode, and requires a specific | |
1787 | * SET_FEATURES spin-up subcommand before it will accept | |
1788 | * anything other than the original IDENTIFY command. | |
1789 | */ | |
1790 | ata_tf_init(dev, &tf); | |
1791 | tf.command = ATA_CMD_SET_FEATURES; | |
1792 | tf.feature = SETFEATURES_SPINUP; | |
1793 | tf.protocol = ATA_PROT_NODATA; | |
1794 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
1795 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0); | |
fb0582f9 | 1796 | if (err_mask && id[2] != 0x738c) { |
169439c2 ML |
1797 | rc = -EIO; |
1798 | reason = "SPINUP failed"; | |
1799 | goto err_out; | |
1800 | } | |
1801 | /* | |
1802 | * If the drive initially returned incomplete IDENTIFY info, | |
1803 | * we now must reissue the IDENTIFY command. | |
1804 | */ | |
1805 | if (id[2] == 0x37c8) | |
1806 | goto retry; | |
1807 | } | |
1808 | ||
bff04647 | 1809 | if ((flags & ATA_READID_POSTRESET) && class == ATA_DEV_ATA) { |
49016aca TH |
1810 | /* |
1811 | * The exact sequence expected by certain pre-ATA4 drives is: | |
1812 | * SRST RESET | |
50a99018 AC |
1813 | * IDENTIFY (optional in early ATA) |
1814 | * INITIALIZE DEVICE PARAMETERS (later IDE and ATA) | |
49016aca TH |
1815 | * anything else.. |
1816 | * Some drives were very specific about that exact sequence. | |
50a99018 AC |
1817 | * |
1818 | * Note that ATA4 says lba is mandatory so the second check | |
1819 | * shoud never trigger. | |
49016aca TH |
1820 | */ |
1821 | if (ata_id_major_version(id) < 4 || !ata_id_has_lba(id)) { | |
3373efd8 | 1822 | err_mask = ata_dev_init_params(dev, id[3], id[6]); |
49016aca TH |
1823 | if (err_mask) { |
1824 | rc = -EIO; | |
1825 | reason = "INIT_DEV_PARAMS failed"; | |
1826 | goto err_out; | |
1827 | } | |
1828 | ||
1829 | /* current CHS translation info (id[53-58]) might be | |
1830 | * changed. reread the identify device info. | |
1831 | */ | |
bff04647 | 1832 | flags &= ~ATA_READID_POSTRESET; |
49016aca TH |
1833 | goto retry; |
1834 | } | |
1835 | } | |
1836 | ||
1837 | *p_class = class; | |
fe635c7e | 1838 | |
49016aca TH |
1839 | return 0; |
1840 | ||
1841 | err_out: | |
88574551 | 1842 | if (ata_msg_warn(ap)) |
0dd4b21f | 1843 | ata_dev_printk(dev, KERN_WARNING, "failed to IDENTIFY " |
88574551 | 1844 | "(%s, err_mask=0x%x)\n", reason, err_mask); |
49016aca TH |
1845 | return rc; |
1846 | } | |
1847 | ||
3373efd8 | 1848 | static inline u8 ata_dev_knobble(struct ata_device *dev) |
4b2f3ede | 1849 | { |
9af5c9c9 TH |
1850 | struct ata_port *ap = dev->link->ap; |
1851 | return ((ap->cbl == ATA_CBL_SATA) && (!ata_id_is_sata(dev->id))); | |
4b2f3ede TH |
1852 | } |
1853 | ||
a6e6ce8e TH |
1854 | static void ata_dev_config_ncq(struct ata_device *dev, |
1855 | char *desc, size_t desc_sz) | |
1856 | { | |
9af5c9c9 | 1857 | struct ata_port *ap = dev->link->ap; |
a6e6ce8e TH |
1858 | int hdepth = 0, ddepth = ata_id_queue_depth(dev->id); |
1859 | ||
1860 | if (!ata_id_has_ncq(dev->id)) { | |
1861 | desc[0] = '\0'; | |
1862 | return; | |
1863 | } | |
75683fe7 | 1864 | if (dev->horkage & ATA_HORKAGE_NONCQ) { |
6919a0a6 AC |
1865 | snprintf(desc, desc_sz, "NCQ (not used)"); |
1866 | return; | |
1867 | } | |
a6e6ce8e | 1868 | if (ap->flags & ATA_FLAG_NCQ) { |
cca3974e | 1869 | hdepth = min(ap->scsi_host->can_queue, ATA_MAX_QUEUE - 1); |
a6e6ce8e TH |
1870 | dev->flags |= ATA_DFLAG_NCQ; |
1871 | } | |
1872 | ||
1873 | if (hdepth >= ddepth) | |
1874 | snprintf(desc, desc_sz, "NCQ (depth %d)", ddepth); | |
1875 | else | |
1876 | snprintf(desc, desc_sz, "NCQ (depth %d/%d)", hdepth, ddepth); | |
1877 | } | |
1878 | ||
49016aca | 1879 | /** |
ffeae418 | 1880 | * ata_dev_configure - Configure the specified ATA/ATAPI device |
ffeae418 TH |
1881 | * @dev: Target device to configure |
1882 | * | |
1883 | * Configure @dev according to @dev->id. Generic and low-level | |
1884 | * driver specific fixups are also applied. | |
49016aca TH |
1885 | * |
1886 | * LOCKING: | |
ffeae418 TH |
1887 | * Kernel thread context (may sleep) |
1888 | * | |
1889 | * RETURNS: | |
1890 | * 0 on success, -errno otherwise | |
49016aca | 1891 | */ |
efdaedc4 | 1892 | int ata_dev_configure(struct ata_device *dev) |
49016aca | 1893 | { |
9af5c9c9 TH |
1894 | struct ata_port *ap = dev->link->ap; |
1895 | struct ata_eh_context *ehc = &dev->link->eh_context; | |
6746544c | 1896 | int print_info = ehc->i.flags & ATA_EHI_PRINTINFO; |
1148c3a7 | 1897 | const u16 *id = dev->id; |
ff8854b2 | 1898 | unsigned int xfer_mask; |
b352e57d | 1899 | char revbuf[7]; /* XYZ-99\0 */ |
3f64f565 EM |
1900 | char fwrevbuf[ATA_ID_FW_REV_LEN+1]; |
1901 | char modelbuf[ATA_ID_PROD_LEN+1]; | |
e6d902a3 | 1902 | int rc; |
49016aca | 1903 | |
0dd4b21f | 1904 | if (!ata_dev_enabled(dev) && ata_msg_info(ap)) { |
44877b4e TH |
1905 | ata_dev_printk(dev, KERN_INFO, "%s: ENTER/EXIT -- nodev\n", |
1906 | __FUNCTION__); | |
ffeae418 | 1907 | return 0; |
49016aca TH |
1908 | } |
1909 | ||
0dd4b21f | 1910 | if (ata_msg_probe(ap)) |
44877b4e | 1911 | ata_dev_printk(dev, KERN_DEBUG, "%s: ENTER\n", __FUNCTION__); |
1da177e4 | 1912 | |
75683fe7 TH |
1913 | /* set horkage */ |
1914 | dev->horkage |= ata_dev_blacklisted(dev); | |
1915 | ||
6746544c TH |
1916 | /* let ACPI work its magic */ |
1917 | rc = ata_acpi_on_devcfg(dev); | |
1918 | if (rc) | |
1919 | return rc; | |
08573a86 | 1920 | |
05027adc TH |
1921 | /* massage HPA, do it early as it might change IDENTIFY data */ |
1922 | rc = ata_hpa_resize(dev); | |
1923 | if (rc) | |
1924 | return rc; | |
1925 | ||
c39f5ebe | 1926 | /* print device capabilities */ |
0dd4b21f | 1927 | if (ata_msg_probe(ap)) |
88574551 TH |
1928 | ata_dev_printk(dev, KERN_DEBUG, |
1929 | "%s: cfg 49:%04x 82:%04x 83:%04x 84:%04x " | |
1930 | "85:%04x 86:%04x 87:%04x 88:%04x\n", | |
0dd4b21f | 1931 | __FUNCTION__, |
f15a1daf TH |
1932 | id[49], id[82], id[83], id[84], |
1933 | id[85], id[86], id[87], id[88]); | |
c39f5ebe | 1934 | |
208a9933 | 1935 | /* initialize to-be-configured parameters */ |
ea1dd4e1 | 1936 | dev->flags &= ~ATA_DFLAG_CFG_MASK; |
208a9933 TH |
1937 | dev->max_sectors = 0; |
1938 | dev->cdb_len = 0; | |
1939 | dev->n_sectors = 0; | |
1940 | dev->cylinders = 0; | |
1941 | dev->heads = 0; | |
1942 | dev->sectors = 0; | |
1943 | ||
1da177e4 LT |
1944 | /* |
1945 | * common ATA, ATAPI feature tests | |
1946 | */ | |
1947 | ||
ff8854b2 | 1948 | /* find max transfer mode; for printk only */ |
1148c3a7 | 1949 | xfer_mask = ata_id_xfermask(id); |
1da177e4 | 1950 | |
0dd4b21f BP |
1951 | if (ata_msg_probe(ap)) |
1952 | ata_dump_id(id); | |
1da177e4 | 1953 | |
ef143d57 AL |
1954 | /* SCSI only uses 4-char revisions, dump full 8 chars from ATA */ |
1955 | ata_id_c_string(dev->id, fwrevbuf, ATA_ID_FW_REV, | |
1956 | sizeof(fwrevbuf)); | |
1957 | ||
1958 | ata_id_c_string(dev->id, modelbuf, ATA_ID_PROD, | |
1959 | sizeof(modelbuf)); | |
1960 | ||
1da177e4 LT |
1961 | /* ATA-specific feature tests */ |
1962 | if (dev->class == ATA_DEV_ATA) { | |
b352e57d AC |
1963 | if (ata_id_is_cfa(id)) { |
1964 | if (id[162] & 1) /* CPRM may make this media unusable */ | |
44877b4e TH |
1965 | ata_dev_printk(dev, KERN_WARNING, |
1966 | "supports DRM functions and may " | |
1967 | "not be fully accessable.\n"); | |
b352e57d AC |
1968 | snprintf(revbuf, 7, "CFA"); |
1969 | } | |
1970 | else | |
1971 | snprintf(revbuf, 7, "ATA-%d", ata_id_major_version(id)); | |
1972 | ||
1148c3a7 | 1973 | dev->n_sectors = ata_id_n_sectors(id); |
2940740b | 1974 | |
3f64f565 EM |
1975 | if (dev->id[59] & 0x100) |
1976 | dev->multi_count = dev->id[59] & 0xff; | |
1977 | ||
1148c3a7 | 1978 | if (ata_id_has_lba(id)) { |
4c2d721a | 1979 | const char *lba_desc; |
a6e6ce8e | 1980 | char ncq_desc[20]; |
8bf62ece | 1981 | |
4c2d721a TH |
1982 | lba_desc = "LBA"; |
1983 | dev->flags |= ATA_DFLAG_LBA; | |
1148c3a7 | 1984 | if (ata_id_has_lba48(id)) { |
8bf62ece | 1985 | dev->flags |= ATA_DFLAG_LBA48; |
4c2d721a | 1986 | lba_desc = "LBA48"; |
6fc49adb TH |
1987 | |
1988 | if (dev->n_sectors >= (1UL << 28) && | |
1989 | ata_id_has_flush_ext(id)) | |
1990 | dev->flags |= ATA_DFLAG_FLUSH_EXT; | |
4c2d721a | 1991 | } |
8bf62ece | 1992 | |
a6e6ce8e TH |
1993 | /* config NCQ */ |
1994 | ata_dev_config_ncq(dev, ncq_desc, sizeof(ncq_desc)); | |
1995 | ||
8bf62ece | 1996 | /* print device info to dmesg */ |
3f64f565 EM |
1997 | if (ata_msg_drv(ap) && print_info) { |
1998 | ata_dev_printk(dev, KERN_INFO, | |
1999 | "%s: %s, %s, max %s\n", | |
2000 | revbuf, modelbuf, fwrevbuf, | |
2001 | ata_mode_string(xfer_mask)); | |
2002 | ata_dev_printk(dev, KERN_INFO, | |
2003 | "%Lu sectors, multi %u: %s %s\n", | |
f15a1daf | 2004 | (unsigned long long)dev->n_sectors, |
3f64f565 EM |
2005 | dev->multi_count, lba_desc, ncq_desc); |
2006 | } | |
ffeae418 | 2007 | } else { |
8bf62ece AL |
2008 | /* CHS */ |
2009 | ||
2010 | /* Default translation */ | |
1148c3a7 TH |
2011 | dev->cylinders = id[1]; |
2012 | dev->heads = id[3]; | |
2013 | dev->sectors = id[6]; | |
8bf62ece | 2014 | |
1148c3a7 | 2015 | if (ata_id_current_chs_valid(id)) { |
8bf62ece | 2016 | /* Current CHS translation is valid. */ |
1148c3a7 TH |
2017 | dev->cylinders = id[54]; |
2018 | dev->heads = id[55]; | |
2019 | dev->sectors = id[56]; | |
8bf62ece AL |
2020 | } |
2021 | ||
2022 | /* print device info to dmesg */ | |
3f64f565 | 2023 | if (ata_msg_drv(ap) && print_info) { |
88574551 | 2024 | ata_dev_printk(dev, KERN_INFO, |
3f64f565 EM |
2025 | "%s: %s, %s, max %s\n", |
2026 | revbuf, modelbuf, fwrevbuf, | |
2027 | ata_mode_string(xfer_mask)); | |
a84471fe | 2028 | ata_dev_printk(dev, KERN_INFO, |
3f64f565 EM |
2029 | "%Lu sectors, multi %u, CHS %u/%u/%u\n", |
2030 | (unsigned long long)dev->n_sectors, | |
2031 | dev->multi_count, dev->cylinders, | |
2032 | dev->heads, dev->sectors); | |
2033 | } | |
07f6f7d0 AL |
2034 | } |
2035 | ||
6e7846e9 | 2036 | dev->cdb_len = 16; |
1da177e4 LT |
2037 | } |
2038 | ||
2039 | /* ATAPI-specific feature tests */ | |
2c13b7ce | 2040 | else if (dev->class == ATA_DEV_ATAPI) { |
854c73a2 TH |
2041 | const char *cdb_intr_string = ""; |
2042 | const char *atapi_an_string = ""; | |
7d77b247 | 2043 | u32 sntf; |
08a556db | 2044 | |
1148c3a7 | 2045 | rc = atapi_cdb_len(id); |
1da177e4 | 2046 | if ((rc < 12) || (rc > ATAPI_CDB_LEN)) { |
0dd4b21f | 2047 | if (ata_msg_warn(ap)) |
88574551 TH |
2048 | ata_dev_printk(dev, KERN_WARNING, |
2049 | "unsupported CDB len\n"); | |
ffeae418 | 2050 | rc = -EINVAL; |
1da177e4 LT |
2051 | goto err_out_nosup; |
2052 | } | |
6e7846e9 | 2053 | dev->cdb_len = (unsigned int) rc; |
1da177e4 | 2054 | |
7d77b247 TH |
2055 | /* Enable ATAPI AN if both the host and device have |
2056 | * the support. If PMP is attached, SNTF is required | |
2057 | * to enable ATAPI AN to discern between PHY status | |
2058 | * changed notifications and ATAPI ANs. | |
9f45cbd3 | 2059 | */ |
7d77b247 TH |
2060 | if ((ap->flags & ATA_FLAG_AN) && ata_id_has_atapi_AN(id) && |
2061 | (!ap->nr_pmp_links || | |
2062 | sata_scr_read(&ap->link, SCR_NOTIFICATION, &sntf) == 0)) { | |
854c73a2 TH |
2063 | unsigned int err_mask; |
2064 | ||
9f45cbd3 | 2065 | /* issue SET feature command to turn this on */ |
854c73a2 TH |
2066 | err_mask = ata_dev_set_AN(dev, SETFEATURES_SATA_ENABLE); |
2067 | if (err_mask) | |
9f45cbd3 | 2068 | ata_dev_printk(dev, KERN_ERR, |
854c73a2 TH |
2069 | "failed to enable ATAPI AN " |
2070 | "(err_mask=0x%x)\n", err_mask); | |
2071 | else { | |
9f45cbd3 | 2072 | dev->flags |= ATA_DFLAG_AN; |
854c73a2 TH |
2073 | atapi_an_string = ", ATAPI AN"; |
2074 | } | |
9f45cbd3 KCA |
2075 | } |
2076 | ||
08a556db | 2077 | if (ata_id_cdb_intr(dev->id)) { |
312f7da2 | 2078 | dev->flags |= ATA_DFLAG_CDB_INTR; |
08a556db AL |
2079 | cdb_intr_string = ", CDB intr"; |
2080 | } | |
312f7da2 | 2081 | |
1da177e4 | 2082 | /* print device info to dmesg */ |
5afc8142 | 2083 | if (ata_msg_drv(ap) && print_info) |
ef143d57 | 2084 | ata_dev_printk(dev, KERN_INFO, |
854c73a2 | 2085 | "ATAPI: %s, %s, max %s%s%s\n", |
ef143d57 | 2086 | modelbuf, fwrevbuf, |
12436c30 | 2087 | ata_mode_string(xfer_mask), |
854c73a2 | 2088 | cdb_intr_string, atapi_an_string); |
1da177e4 LT |
2089 | } |
2090 | ||
914ed354 TH |
2091 | /* determine max_sectors */ |
2092 | dev->max_sectors = ATA_MAX_SECTORS; | |
2093 | if (dev->flags & ATA_DFLAG_LBA48) | |
2094 | dev->max_sectors = ATA_MAX_SECTORS_LBA48; | |
2095 | ||
93590859 AC |
2096 | if (dev->horkage & ATA_HORKAGE_DIAGNOSTIC) { |
2097 | /* Let the user know. We don't want to disallow opens for | |
2098 | rescue purposes, or in case the vendor is just a blithering | |
2099 | idiot */ | |
2100 | if (print_info) { | |
2101 | ata_dev_printk(dev, KERN_WARNING, | |
2102 | "Drive reports diagnostics failure. This may indicate a drive\n"); | |
2103 | ata_dev_printk(dev, KERN_WARNING, | |
2104 | "fault or invalid emulation. Contact drive vendor for information.\n"); | |
2105 | } | |
2106 | } | |
2107 | ||
4b2f3ede | 2108 | /* limit bridge transfers to udma5, 200 sectors */ |
3373efd8 | 2109 | if (ata_dev_knobble(dev)) { |
5afc8142 | 2110 | if (ata_msg_drv(ap) && print_info) |
f15a1daf TH |
2111 | ata_dev_printk(dev, KERN_INFO, |
2112 | "applying bridge limits\n"); | |
5a529139 | 2113 | dev->udma_mask &= ATA_UDMA5; |
4b2f3ede TH |
2114 | dev->max_sectors = ATA_MAX_SECTORS; |
2115 | } | |
2116 | ||
75683fe7 | 2117 | if (dev->horkage & ATA_HORKAGE_MAX_SEC_128) |
03ec52de TH |
2118 | dev->max_sectors = min_t(unsigned int, ATA_MAX_SECTORS_128, |
2119 | dev->max_sectors); | |
18d6e9d5 | 2120 | |
4b2f3ede | 2121 | if (ap->ops->dev_config) |
cd0d3bbc | 2122 | ap->ops->dev_config(dev); |
4b2f3ede | 2123 | |
0dd4b21f BP |
2124 | if (ata_msg_probe(ap)) |
2125 | ata_dev_printk(dev, KERN_DEBUG, "%s: EXIT, drv_stat = 0x%x\n", | |
2126 | __FUNCTION__, ata_chk_status(ap)); | |
ffeae418 | 2127 | return 0; |
1da177e4 LT |
2128 | |
2129 | err_out_nosup: | |
0dd4b21f | 2130 | if (ata_msg_probe(ap)) |
88574551 TH |
2131 | ata_dev_printk(dev, KERN_DEBUG, |
2132 | "%s: EXIT, err\n", __FUNCTION__); | |
ffeae418 | 2133 | return rc; |
1da177e4 LT |
2134 | } |
2135 | ||
be0d18df | 2136 | /** |
2e41e8e6 | 2137 | * ata_cable_40wire - return 40 wire cable type |
be0d18df AC |
2138 | * @ap: port |
2139 | * | |
2e41e8e6 | 2140 | * Helper method for drivers which want to hardwire 40 wire cable |
be0d18df AC |
2141 | * detection. |
2142 | */ | |
2143 | ||
2144 | int ata_cable_40wire(struct ata_port *ap) | |
2145 | { | |
2146 | return ATA_CBL_PATA40; | |
2147 | } | |
2148 | ||
2149 | /** | |
2e41e8e6 | 2150 | * ata_cable_80wire - return 80 wire cable type |
be0d18df AC |
2151 | * @ap: port |
2152 | * | |
2e41e8e6 | 2153 | * Helper method for drivers which want to hardwire 80 wire cable |
be0d18df AC |
2154 | * detection. |
2155 | */ | |
2156 | ||
2157 | int ata_cable_80wire(struct ata_port *ap) | |
2158 | { | |
2159 | return ATA_CBL_PATA80; | |
2160 | } | |
2161 | ||
2162 | /** | |
2163 | * ata_cable_unknown - return unknown PATA cable. | |
2164 | * @ap: port | |
2165 | * | |
2166 | * Helper method for drivers which have no PATA cable detection. | |
2167 | */ | |
2168 | ||
2169 | int ata_cable_unknown(struct ata_port *ap) | |
2170 | { | |
2171 | return ATA_CBL_PATA_UNK; | |
2172 | } | |
2173 | ||
2174 | /** | |
2175 | * ata_cable_sata - return SATA cable type | |
2176 | * @ap: port | |
2177 | * | |
2178 | * Helper method for drivers which have SATA cables | |
2179 | */ | |
2180 | ||
2181 | int ata_cable_sata(struct ata_port *ap) | |
2182 | { | |
2183 | return ATA_CBL_SATA; | |
2184 | } | |
2185 | ||
1da177e4 LT |
2186 | /** |
2187 | * ata_bus_probe - Reset and probe ATA bus | |
2188 | * @ap: Bus to probe | |
2189 | * | |
0cba632b JG |
2190 | * Master ATA bus probing function. Initiates a hardware-dependent |
2191 | * bus reset, then attempts to identify any devices found on | |
2192 | * the bus. | |
2193 | * | |
1da177e4 | 2194 | * LOCKING: |
0cba632b | 2195 | * PCI/etc. bus probe sem. |
1da177e4 LT |
2196 | * |
2197 | * RETURNS: | |
96072e69 | 2198 | * Zero on success, negative errno otherwise. |
1da177e4 LT |
2199 | */ |
2200 | ||
80289167 | 2201 | int ata_bus_probe(struct ata_port *ap) |
1da177e4 | 2202 | { |
28ca5c57 | 2203 | unsigned int classes[ATA_MAX_DEVICES]; |
14d2bac1 | 2204 | int tries[ATA_MAX_DEVICES]; |
f58229f8 | 2205 | int rc; |
e82cbdb9 | 2206 | struct ata_device *dev; |
1da177e4 | 2207 | |
28ca5c57 | 2208 | ata_port_probe(ap); |
c19ba8af | 2209 | |
f58229f8 TH |
2210 | ata_link_for_each_dev(dev, &ap->link) |
2211 | tries[dev->devno] = ATA_PROBE_MAX_TRIES; | |
14d2bac1 TH |
2212 | |
2213 | retry: | |
2044470c | 2214 | /* reset and determine device classes */ |
52783c5d | 2215 | ap->ops->phy_reset(ap); |
2061a47a | 2216 | |
f58229f8 | 2217 | ata_link_for_each_dev(dev, &ap->link) { |
52783c5d TH |
2218 | if (!(ap->flags & ATA_FLAG_DISABLED) && |
2219 | dev->class != ATA_DEV_UNKNOWN) | |
2220 | classes[dev->devno] = dev->class; | |
2221 | else | |
2222 | classes[dev->devno] = ATA_DEV_NONE; | |
2044470c | 2223 | |
52783c5d | 2224 | dev->class = ATA_DEV_UNKNOWN; |
28ca5c57 | 2225 | } |
1da177e4 | 2226 | |
52783c5d | 2227 | ata_port_probe(ap); |
2044470c | 2228 | |
b6079ca4 AC |
2229 | /* after the reset the device state is PIO 0 and the controller |
2230 | state is undefined. Record the mode */ | |
2231 | ||
f58229f8 TH |
2232 | ata_link_for_each_dev(dev, &ap->link) |
2233 | dev->pio_mode = XFER_PIO_0; | |
b6079ca4 | 2234 | |
f31f0cc2 JG |
2235 | /* read IDENTIFY page and configure devices. We have to do the identify |
2236 | specific sequence bass-ackwards so that PDIAG- is released by | |
2237 | the slave device */ | |
2238 | ||
f58229f8 TH |
2239 | ata_link_for_each_dev(dev, &ap->link) { |
2240 | if (tries[dev->devno]) | |
2241 | dev->class = classes[dev->devno]; | |
ffeae418 | 2242 | |
14d2bac1 | 2243 | if (!ata_dev_enabled(dev)) |
ffeae418 | 2244 | continue; |
ffeae418 | 2245 | |
bff04647 TH |
2246 | rc = ata_dev_read_id(dev, &dev->class, ATA_READID_POSTRESET, |
2247 | dev->id); | |
14d2bac1 TH |
2248 | if (rc) |
2249 | goto fail; | |
f31f0cc2 JG |
2250 | } |
2251 | ||
be0d18df AC |
2252 | /* Now ask for the cable type as PDIAG- should have been released */ |
2253 | if (ap->ops->cable_detect) | |
2254 | ap->cbl = ap->ops->cable_detect(ap); | |
2255 | ||
614fe29b AC |
2256 | /* We may have SATA bridge glue hiding here irrespective of the |
2257 | reported cable types and sensed types */ | |
2258 | ata_link_for_each_dev(dev, &ap->link) { | |
2259 | if (!ata_dev_enabled(dev)) | |
2260 | continue; | |
2261 | /* SATA drives indicate we have a bridge. We don't know which | |
2262 | end of the link the bridge is which is a problem */ | |
2263 | if (ata_id_is_sata(dev->id)) | |
2264 | ap->cbl = ATA_CBL_SATA; | |
2265 | } | |
2266 | ||
f31f0cc2 JG |
2267 | /* After the identify sequence we can now set up the devices. We do |
2268 | this in the normal order so that the user doesn't get confused */ | |
2269 | ||
f58229f8 | 2270 | ata_link_for_each_dev(dev, &ap->link) { |
f31f0cc2 JG |
2271 | if (!ata_dev_enabled(dev)) |
2272 | continue; | |
14d2bac1 | 2273 | |
9af5c9c9 | 2274 | ap->link.eh_context.i.flags |= ATA_EHI_PRINTINFO; |
efdaedc4 | 2275 | rc = ata_dev_configure(dev); |
9af5c9c9 | 2276 | ap->link.eh_context.i.flags &= ~ATA_EHI_PRINTINFO; |
14d2bac1 TH |
2277 | if (rc) |
2278 | goto fail; | |
1da177e4 LT |
2279 | } |
2280 | ||
e82cbdb9 | 2281 | /* configure transfer mode */ |
0260731f | 2282 | rc = ata_set_mode(&ap->link, &dev); |
4ae72a1e | 2283 | if (rc) |
51713d35 | 2284 | goto fail; |
1da177e4 | 2285 | |
f58229f8 TH |
2286 | ata_link_for_each_dev(dev, &ap->link) |
2287 | if (ata_dev_enabled(dev)) | |
e82cbdb9 | 2288 | return 0; |
1da177e4 | 2289 | |
e82cbdb9 TH |
2290 | /* no device present, disable port */ |
2291 | ata_port_disable(ap); | |
96072e69 | 2292 | return -ENODEV; |
14d2bac1 TH |
2293 | |
2294 | fail: | |
4ae72a1e TH |
2295 | tries[dev->devno]--; |
2296 | ||
14d2bac1 TH |
2297 | switch (rc) { |
2298 | case -EINVAL: | |
4ae72a1e | 2299 | /* eeek, something went very wrong, give up */ |
14d2bac1 TH |
2300 | tries[dev->devno] = 0; |
2301 | break; | |
4ae72a1e TH |
2302 | |
2303 | case -ENODEV: | |
2304 | /* give it just one more chance */ | |
2305 | tries[dev->devno] = min(tries[dev->devno], 1); | |
14d2bac1 | 2306 | case -EIO: |
4ae72a1e TH |
2307 | if (tries[dev->devno] == 1) { |
2308 | /* This is the last chance, better to slow | |
2309 | * down than lose it. | |
2310 | */ | |
936fd732 | 2311 | sata_down_spd_limit(&ap->link); |
4ae72a1e TH |
2312 | ata_down_xfermask_limit(dev, ATA_DNXFER_PIO); |
2313 | } | |
14d2bac1 TH |
2314 | } |
2315 | ||
4ae72a1e | 2316 | if (!tries[dev->devno]) |
3373efd8 | 2317 | ata_dev_disable(dev); |
ec573755 | 2318 | |
14d2bac1 | 2319 | goto retry; |
1da177e4 LT |
2320 | } |
2321 | ||
2322 | /** | |
0cba632b JG |
2323 | * ata_port_probe - Mark port as enabled |
2324 | * @ap: Port for which we indicate enablement | |
1da177e4 | 2325 | * |
0cba632b JG |
2326 | * Modify @ap data structure such that the system |
2327 | * thinks that the entire port is enabled. | |
2328 | * | |
cca3974e | 2329 | * LOCKING: host lock, or some other form of |
0cba632b | 2330 | * serialization. |
1da177e4 LT |
2331 | */ |
2332 | ||
2333 | void ata_port_probe(struct ata_port *ap) | |
2334 | { | |
198e0fed | 2335 | ap->flags &= ~ATA_FLAG_DISABLED; |
1da177e4 LT |
2336 | } |
2337 | ||
3be680b7 TH |
2338 | /** |
2339 | * sata_print_link_status - Print SATA link status | |
936fd732 | 2340 | * @link: SATA link to printk link status about |
3be680b7 TH |
2341 | * |
2342 | * This function prints link speed and status of a SATA link. | |
2343 | * | |
2344 | * LOCKING: | |
2345 | * None. | |
2346 | */ | |
936fd732 | 2347 | void sata_print_link_status(struct ata_link *link) |
3be680b7 | 2348 | { |
6d5f9732 | 2349 | u32 sstatus, scontrol, tmp; |
3be680b7 | 2350 | |
936fd732 | 2351 | if (sata_scr_read(link, SCR_STATUS, &sstatus)) |
3be680b7 | 2352 | return; |
936fd732 | 2353 | sata_scr_read(link, SCR_CONTROL, &scontrol); |
3be680b7 | 2354 | |
936fd732 | 2355 | if (ata_link_online(link)) { |
3be680b7 | 2356 | tmp = (sstatus >> 4) & 0xf; |
936fd732 | 2357 | ata_link_printk(link, KERN_INFO, |
f15a1daf TH |
2358 | "SATA link up %s (SStatus %X SControl %X)\n", |
2359 | sata_spd_string(tmp), sstatus, scontrol); | |
3be680b7 | 2360 | } else { |
936fd732 | 2361 | ata_link_printk(link, KERN_INFO, |
f15a1daf TH |
2362 | "SATA link down (SStatus %X SControl %X)\n", |
2363 | sstatus, scontrol); | |
3be680b7 TH |
2364 | } |
2365 | } | |
2366 | ||
1da177e4 | 2367 | /** |
780a87f7 JG |
2368 | * __sata_phy_reset - Wake/reset a low-level SATA PHY |
2369 | * @ap: SATA port associated with target SATA PHY. | |
1da177e4 | 2370 | * |
780a87f7 JG |
2371 | * This function issues commands to standard SATA Sxxx |
2372 | * PHY registers, to wake up the phy (and device), and | |
2373 | * clear any reset condition. | |
1da177e4 LT |
2374 | * |
2375 | * LOCKING: | |
0cba632b | 2376 | * PCI/etc. bus probe sem. |
1da177e4 LT |
2377 | * |
2378 | */ | |
2379 | void __sata_phy_reset(struct ata_port *ap) | |
2380 | { | |
936fd732 | 2381 | struct ata_link *link = &ap->link; |
1da177e4 | 2382 | unsigned long timeout = jiffies + (HZ * 5); |
936fd732 | 2383 | u32 sstatus; |
1da177e4 LT |
2384 | |
2385 | if (ap->flags & ATA_FLAG_SATA_RESET) { | |
cdcca89e | 2386 | /* issue phy wake/reset */ |
936fd732 | 2387 | sata_scr_write_flush(link, SCR_CONTROL, 0x301); |
62ba2841 TH |
2388 | /* Couldn't find anything in SATA I/II specs, but |
2389 | * AHCI-1.1 10.4.2 says at least 1 ms. */ | |
2390 | mdelay(1); | |
1da177e4 | 2391 | } |
81952c54 | 2392 | /* phy wake/clear reset */ |
936fd732 | 2393 | sata_scr_write_flush(link, SCR_CONTROL, 0x300); |
1da177e4 LT |
2394 | |
2395 | /* wait for phy to become ready, if necessary */ | |
2396 | do { | |
2397 | msleep(200); | |
936fd732 | 2398 | sata_scr_read(link, SCR_STATUS, &sstatus); |
1da177e4 LT |
2399 | if ((sstatus & 0xf) != 1) |
2400 | break; | |
2401 | } while (time_before(jiffies, timeout)); | |
2402 | ||
3be680b7 | 2403 | /* print link status */ |
936fd732 | 2404 | sata_print_link_status(link); |
656563e3 | 2405 | |
3be680b7 | 2406 | /* TODO: phy layer with polling, timeouts, etc. */ |
936fd732 | 2407 | if (!ata_link_offline(link)) |
1da177e4 | 2408 | ata_port_probe(ap); |
3be680b7 | 2409 | else |
1da177e4 | 2410 | ata_port_disable(ap); |
1da177e4 | 2411 | |
198e0fed | 2412 | if (ap->flags & ATA_FLAG_DISABLED) |
1da177e4 LT |
2413 | return; |
2414 | ||
2415 | if (ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT)) { | |
2416 | ata_port_disable(ap); | |
2417 | return; | |
2418 | } | |
2419 | ||
2420 | ap->cbl = ATA_CBL_SATA; | |
2421 | } | |
2422 | ||
2423 | /** | |
780a87f7 JG |
2424 | * sata_phy_reset - Reset SATA bus. |
2425 | * @ap: SATA port associated with target SATA PHY. | |
1da177e4 | 2426 | * |
780a87f7 JG |
2427 | * This function resets the SATA bus, and then probes |
2428 | * the bus for devices. | |
1da177e4 LT |
2429 | * |
2430 | * LOCKING: | |
0cba632b | 2431 | * PCI/etc. bus probe sem. |
1da177e4 LT |
2432 | * |
2433 | */ | |
2434 | void sata_phy_reset(struct ata_port *ap) | |
2435 | { | |
2436 | __sata_phy_reset(ap); | |
198e0fed | 2437 | if (ap->flags & ATA_FLAG_DISABLED) |
1da177e4 LT |
2438 | return; |
2439 | ata_bus_reset(ap); | |
2440 | } | |
2441 | ||
ebdfca6e AC |
2442 | /** |
2443 | * ata_dev_pair - return other device on cable | |
ebdfca6e AC |
2444 | * @adev: device |
2445 | * | |
2446 | * Obtain the other device on the same cable, or if none is | |
2447 | * present NULL is returned | |
2448 | */ | |
2e9edbf8 | 2449 | |
3373efd8 | 2450 | struct ata_device *ata_dev_pair(struct ata_device *adev) |
ebdfca6e | 2451 | { |
9af5c9c9 TH |
2452 | struct ata_link *link = adev->link; |
2453 | struct ata_device *pair = &link->device[1 - adev->devno]; | |
e1211e3f | 2454 | if (!ata_dev_enabled(pair)) |
ebdfca6e AC |
2455 | return NULL; |
2456 | return pair; | |
2457 | } | |
2458 | ||
1da177e4 | 2459 | /** |
780a87f7 JG |
2460 | * ata_port_disable - Disable port. |
2461 | * @ap: Port to be disabled. | |
1da177e4 | 2462 | * |
780a87f7 JG |
2463 | * Modify @ap data structure such that the system |
2464 | * thinks that the entire port is disabled, and should | |
2465 | * never attempt to probe or communicate with devices | |
2466 | * on this port. | |
2467 | * | |
cca3974e | 2468 | * LOCKING: host lock, or some other form of |
780a87f7 | 2469 | * serialization. |
1da177e4 LT |
2470 | */ |
2471 | ||
2472 | void ata_port_disable(struct ata_port *ap) | |
2473 | { | |
9af5c9c9 TH |
2474 | ap->link.device[0].class = ATA_DEV_NONE; |
2475 | ap->link.device[1].class = ATA_DEV_NONE; | |
198e0fed | 2476 | ap->flags |= ATA_FLAG_DISABLED; |
1da177e4 LT |
2477 | } |
2478 | ||
1c3fae4d | 2479 | /** |
3c567b7d | 2480 | * sata_down_spd_limit - adjust SATA spd limit downward |
936fd732 | 2481 | * @link: Link to adjust SATA spd limit for |
1c3fae4d | 2482 | * |
936fd732 | 2483 | * Adjust SATA spd limit of @link downward. Note that this |
1c3fae4d | 2484 | * function only adjusts the limit. The change must be applied |
3c567b7d | 2485 | * using sata_set_spd(). |
1c3fae4d TH |
2486 | * |
2487 | * LOCKING: | |
2488 | * Inherited from caller. | |
2489 | * | |
2490 | * RETURNS: | |
2491 | * 0 on success, negative errno on failure | |
2492 | */ | |
936fd732 | 2493 | int sata_down_spd_limit(struct ata_link *link) |
1c3fae4d | 2494 | { |
81952c54 TH |
2495 | u32 sstatus, spd, mask; |
2496 | int rc, highbit; | |
1c3fae4d | 2497 | |
936fd732 | 2498 | if (!sata_scr_valid(link)) |
008a7896 TH |
2499 | return -EOPNOTSUPP; |
2500 | ||
2501 | /* If SCR can be read, use it to determine the current SPD. | |
936fd732 | 2502 | * If not, use cached value in link->sata_spd. |
008a7896 | 2503 | */ |
936fd732 | 2504 | rc = sata_scr_read(link, SCR_STATUS, &sstatus); |
008a7896 TH |
2505 | if (rc == 0) |
2506 | spd = (sstatus >> 4) & 0xf; | |
2507 | else | |
936fd732 | 2508 | spd = link->sata_spd; |
1c3fae4d | 2509 | |
936fd732 | 2510 | mask = link->sata_spd_limit; |
1c3fae4d TH |
2511 | if (mask <= 1) |
2512 | return -EINVAL; | |
008a7896 TH |
2513 | |
2514 | /* unconditionally mask off the highest bit */ | |
1c3fae4d TH |
2515 | highbit = fls(mask) - 1; |
2516 | mask &= ~(1 << highbit); | |
2517 | ||
008a7896 TH |
2518 | /* Mask off all speeds higher than or equal to the current |
2519 | * one. Force 1.5Gbps if current SPD is not available. | |
2520 | */ | |
2521 | if (spd > 1) | |
2522 | mask &= (1 << (spd - 1)) - 1; | |
2523 | else | |
2524 | mask &= 1; | |
2525 | ||
2526 | /* were we already at the bottom? */ | |
1c3fae4d TH |
2527 | if (!mask) |
2528 | return -EINVAL; | |
2529 | ||
936fd732 | 2530 | link->sata_spd_limit = mask; |
1c3fae4d | 2531 | |
936fd732 | 2532 | ata_link_printk(link, KERN_WARNING, "limiting SATA link speed to %s\n", |
f15a1daf | 2533 | sata_spd_string(fls(mask))); |
1c3fae4d TH |
2534 | |
2535 | return 0; | |
2536 | } | |
2537 | ||
936fd732 | 2538 | static int __sata_set_spd_needed(struct ata_link *link, u32 *scontrol) |
1c3fae4d TH |
2539 | { |
2540 | u32 spd, limit; | |
2541 | ||
936fd732 | 2542 | if (link->sata_spd_limit == UINT_MAX) |
1c3fae4d TH |
2543 | limit = 0; |
2544 | else | |
936fd732 | 2545 | limit = fls(link->sata_spd_limit); |
1c3fae4d TH |
2546 | |
2547 | spd = (*scontrol >> 4) & 0xf; | |
2548 | *scontrol = (*scontrol & ~0xf0) | ((limit & 0xf) << 4); | |
2549 | ||
2550 | return spd != limit; | |
2551 | } | |
2552 | ||
2553 | /** | |
3c567b7d | 2554 | * sata_set_spd_needed - is SATA spd configuration needed |
936fd732 | 2555 | * @link: Link in question |
1c3fae4d TH |
2556 | * |
2557 | * Test whether the spd limit in SControl matches | |
936fd732 | 2558 | * @link->sata_spd_limit. This function is used to determine |
1c3fae4d TH |
2559 | * whether hardreset is necessary to apply SATA spd |
2560 | * configuration. | |
2561 | * | |
2562 | * LOCKING: | |
2563 | * Inherited from caller. | |
2564 | * | |
2565 | * RETURNS: | |
2566 | * 1 if SATA spd configuration is needed, 0 otherwise. | |
2567 | */ | |
936fd732 | 2568 | int sata_set_spd_needed(struct ata_link *link) |
1c3fae4d TH |
2569 | { |
2570 | u32 scontrol; | |
2571 | ||
936fd732 | 2572 | if (sata_scr_read(link, SCR_CONTROL, &scontrol)) |
1c3fae4d TH |
2573 | return 0; |
2574 | ||
936fd732 | 2575 | return __sata_set_spd_needed(link, &scontrol); |
1c3fae4d TH |
2576 | } |
2577 | ||
2578 | /** | |
3c567b7d | 2579 | * sata_set_spd - set SATA spd according to spd limit |
936fd732 | 2580 | * @link: Link to set SATA spd for |
1c3fae4d | 2581 | * |
936fd732 | 2582 | * Set SATA spd of @link according to sata_spd_limit. |
1c3fae4d TH |
2583 | * |
2584 | * LOCKING: | |
2585 | * Inherited from caller. | |
2586 | * | |
2587 | * RETURNS: | |
2588 | * 0 if spd doesn't need to be changed, 1 if spd has been | |
81952c54 | 2589 | * changed. Negative errno if SCR registers are inaccessible. |
1c3fae4d | 2590 | */ |
936fd732 | 2591 | int sata_set_spd(struct ata_link *link) |
1c3fae4d TH |
2592 | { |
2593 | u32 scontrol; | |
81952c54 | 2594 | int rc; |
1c3fae4d | 2595 | |
936fd732 | 2596 | if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol))) |
81952c54 | 2597 | return rc; |
1c3fae4d | 2598 | |
936fd732 | 2599 | if (!__sata_set_spd_needed(link, &scontrol)) |
1c3fae4d TH |
2600 | return 0; |
2601 | ||
936fd732 | 2602 | if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol))) |
81952c54 TH |
2603 | return rc; |
2604 | ||
1c3fae4d TH |
2605 | return 1; |
2606 | } | |
2607 | ||
452503f9 AC |
2608 | /* |
2609 | * This mode timing computation functionality is ported over from | |
2610 | * drivers/ide/ide-timing.h and was originally written by Vojtech Pavlik | |
2611 | */ | |
2612 | /* | |
b352e57d | 2613 | * PIO 0-4, MWDMA 0-2 and UDMA 0-6 timings (in nanoseconds). |
452503f9 | 2614 | * These were taken from ATA/ATAPI-6 standard, rev 0a, except |
b352e57d AC |
2615 | * for UDMA6, which is currently supported only by Maxtor drives. |
2616 | * | |
2617 | * For PIO 5/6 MWDMA 3/4 see the CFA specification 3.0. | |
452503f9 AC |
2618 | */ |
2619 | ||
2620 | static const struct ata_timing ata_timing[] = { | |
2621 | ||
2622 | { XFER_UDMA_6, 0, 0, 0, 0, 0, 0, 0, 15 }, | |
2623 | { XFER_UDMA_5, 0, 0, 0, 0, 0, 0, 0, 20 }, | |
2624 | { XFER_UDMA_4, 0, 0, 0, 0, 0, 0, 0, 30 }, | |
2625 | { XFER_UDMA_3, 0, 0, 0, 0, 0, 0, 0, 45 }, | |
2626 | ||
b352e57d AC |
2627 | { XFER_MW_DMA_4, 25, 0, 0, 0, 55, 20, 80, 0 }, |
2628 | { XFER_MW_DMA_3, 25, 0, 0, 0, 65, 25, 100, 0 }, | |
452503f9 AC |
2629 | { XFER_UDMA_2, 0, 0, 0, 0, 0, 0, 0, 60 }, |
2630 | { XFER_UDMA_1, 0, 0, 0, 0, 0, 0, 0, 80 }, | |
2631 | { XFER_UDMA_0, 0, 0, 0, 0, 0, 0, 0, 120 }, | |
2632 | ||
2633 | /* { XFER_UDMA_SLOW, 0, 0, 0, 0, 0, 0, 0, 150 }, */ | |
2e9edbf8 | 2634 | |
452503f9 AC |
2635 | { XFER_MW_DMA_2, 25, 0, 0, 0, 70, 25, 120, 0 }, |
2636 | { XFER_MW_DMA_1, 45, 0, 0, 0, 80, 50, 150, 0 }, | |
2637 | { XFER_MW_DMA_0, 60, 0, 0, 0, 215, 215, 480, 0 }, | |
2e9edbf8 | 2638 | |
452503f9 AC |
2639 | { XFER_SW_DMA_2, 60, 0, 0, 0, 120, 120, 240, 0 }, |
2640 | { XFER_SW_DMA_1, 90, 0, 0, 0, 240, 240, 480, 0 }, | |
2641 | { XFER_SW_DMA_0, 120, 0, 0, 0, 480, 480, 960, 0 }, | |
2642 | ||
b352e57d AC |
2643 | { XFER_PIO_6, 10, 55, 20, 80, 55, 20, 80, 0 }, |
2644 | { XFER_PIO_5, 15, 65, 25, 100, 65, 25, 100, 0 }, | |
452503f9 AC |
2645 | { XFER_PIO_4, 25, 70, 25, 120, 70, 25, 120, 0 }, |
2646 | { XFER_PIO_3, 30, 80, 70, 180, 80, 70, 180, 0 }, | |
2647 | ||
2648 | { XFER_PIO_2, 30, 290, 40, 330, 100, 90, 240, 0 }, | |
2649 | { XFER_PIO_1, 50, 290, 93, 383, 125, 100, 383, 0 }, | |
2650 | { XFER_PIO_0, 70, 290, 240, 600, 165, 150, 600, 0 }, | |
2651 | ||
2652 | /* { XFER_PIO_SLOW, 120, 290, 240, 960, 290, 240, 960, 0 }, */ | |
2653 | ||
2654 | { 0xFF } | |
2655 | }; | |
2656 | ||
2657 | #define ENOUGH(v,unit) (((v)-1)/(unit)+1) | |
2658 | #define EZ(v,unit) ((v)?ENOUGH(v,unit):0) | |
2659 | ||
2660 | static void ata_timing_quantize(const struct ata_timing *t, struct ata_timing *q, int T, int UT) | |
2661 | { | |
2662 | q->setup = EZ(t->setup * 1000, T); | |
2663 | q->act8b = EZ(t->act8b * 1000, T); | |
2664 | q->rec8b = EZ(t->rec8b * 1000, T); | |
2665 | q->cyc8b = EZ(t->cyc8b * 1000, T); | |
2666 | q->active = EZ(t->active * 1000, T); | |
2667 | q->recover = EZ(t->recover * 1000, T); | |
2668 | q->cycle = EZ(t->cycle * 1000, T); | |
2669 | q->udma = EZ(t->udma * 1000, UT); | |
2670 | } | |
2671 | ||
2672 | void ata_timing_merge(const struct ata_timing *a, const struct ata_timing *b, | |
2673 | struct ata_timing *m, unsigned int what) | |
2674 | { | |
2675 | if (what & ATA_TIMING_SETUP ) m->setup = max(a->setup, b->setup); | |
2676 | if (what & ATA_TIMING_ACT8B ) m->act8b = max(a->act8b, b->act8b); | |
2677 | if (what & ATA_TIMING_REC8B ) m->rec8b = max(a->rec8b, b->rec8b); | |
2678 | if (what & ATA_TIMING_CYC8B ) m->cyc8b = max(a->cyc8b, b->cyc8b); | |
2679 | if (what & ATA_TIMING_ACTIVE ) m->active = max(a->active, b->active); | |
2680 | if (what & ATA_TIMING_RECOVER) m->recover = max(a->recover, b->recover); | |
2681 | if (what & ATA_TIMING_CYCLE ) m->cycle = max(a->cycle, b->cycle); | |
2682 | if (what & ATA_TIMING_UDMA ) m->udma = max(a->udma, b->udma); | |
2683 | } | |
2684 | ||
2685 | static const struct ata_timing* ata_timing_find_mode(unsigned short speed) | |
2686 | { | |
2687 | const struct ata_timing *t; | |
2688 | ||
2689 | for (t = ata_timing; t->mode != speed; t++) | |
91190758 | 2690 | if (t->mode == 0xFF) |
452503f9 | 2691 | return NULL; |
2e9edbf8 | 2692 | return t; |
452503f9 AC |
2693 | } |
2694 | ||
2695 | int ata_timing_compute(struct ata_device *adev, unsigned short speed, | |
2696 | struct ata_timing *t, int T, int UT) | |
2697 | { | |
2698 | const struct ata_timing *s; | |
2699 | struct ata_timing p; | |
2700 | ||
2701 | /* | |
2e9edbf8 | 2702 | * Find the mode. |
75b1f2f8 | 2703 | */ |
452503f9 AC |
2704 | |
2705 | if (!(s = ata_timing_find_mode(speed))) | |
2706 | return -EINVAL; | |
2707 | ||
75b1f2f8 AL |
2708 | memcpy(t, s, sizeof(*s)); |
2709 | ||
452503f9 AC |
2710 | /* |
2711 | * If the drive is an EIDE drive, it can tell us it needs extended | |
2712 | * PIO/MW_DMA cycle timing. | |
2713 | */ | |
2714 | ||
2715 | if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE drive */ | |
2716 | memset(&p, 0, sizeof(p)); | |
2717 | if(speed >= XFER_PIO_0 && speed <= XFER_SW_DMA_0) { | |
2718 | if (speed <= XFER_PIO_2) p.cycle = p.cyc8b = adev->id[ATA_ID_EIDE_PIO]; | |
2719 | else p.cycle = p.cyc8b = adev->id[ATA_ID_EIDE_PIO_IORDY]; | |
2720 | } else if(speed >= XFER_MW_DMA_0 && speed <= XFER_MW_DMA_2) { | |
2721 | p.cycle = adev->id[ATA_ID_EIDE_DMA_MIN]; | |
2722 | } | |
2723 | ata_timing_merge(&p, t, t, ATA_TIMING_CYCLE | ATA_TIMING_CYC8B); | |
2724 | } | |
2725 | ||
2726 | /* | |
2727 | * Convert the timing to bus clock counts. | |
2728 | */ | |
2729 | ||
75b1f2f8 | 2730 | ata_timing_quantize(t, t, T, UT); |
452503f9 AC |
2731 | |
2732 | /* | |
c893a3ae RD |
2733 | * Even in DMA/UDMA modes we still use PIO access for IDENTIFY, |
2734 | * S.M.A.R.T * and some other commands. We have to ensure that the | |
2735 | * DMA cycle timing is slower/equal than the fastest PIO timing. | |
452503f9 AC |
2736 | */ |
2737 | ||
fd3367af | 2738 | if (speed > XFER_PIO_6) { |
452503f9 AC |
2739 | ata_timing_compute(adev, adev->pio_mode, &p, T, UT); |
2740 | ata_timing_merge(&p, t, t, ATA_TIMING_ALL); | |
2741 | } | |
2742 | ||
2743 | /* | |
c893a3ae | 2744 | * Lengthen active & recovery time so that cycle time is correct. |
452503f9 AC |
2745 | */ |
2746 | ||
2747 | if (t->act8b + t->rec8b < t->cyc8b) { | |
2748 | t->act8b += (t->cyc8b - (t->act8b + t->rec8b)) / 2; | |
2749 | t->rec8b = t->cyc8b - t->act8b; | |
2750 | } | |
2751 | ||
2752 | if (t->active + t->recover < t->cycle) { | |
2753 | t->active += (t->cycle - (t->active + t->recover)) / 2; | |
2754 | t->recover = t->cycle - t->active; | |
2755 | } | |
a617c09f | 2756 | |
4f701d1e AC |
2757 | /* In a few cases quantisation may produce enough errors to |
2758 | leave t->cycle too low for the sum of active and recovery | |
2759 | if so we must correct this */ | |
2760 | if (t->active + t->recover > t->cycle) | |
2761 | t->cycle = t->active + t->recover; | |
452503f9 AC |
2762 | |
2763 | return 0; | |
2764 | } | |
2765 | ||
cf176e1a TH |
2766 | /** |
2767 | * ata_down_xfermask_limit - adjust dev xfer masks downward | |
cf176e1a | 2768 | * @dev: Device to adjust xfer masks |
458337db | 2769 | * @sel: ATA_DNXFER_* selector |
cf176e1a TH |
2770 | * |
2771 | * Adjust xfer masks of @dev downward. Note that this function | |
2772 | * does not apply the change. Invoking ata_set_mode() afterwards | |
2773 | * will apply the limit. | |
2774 | * | |
2775 | * LOCKING: | |
2776 | * Inherited from caller. | |
2777 | * | |
2778 | * RETURNS: | |
2779 | * 0 on success, negative errno on failure | |
2780 | */ | |
458337db | 2781 | int ata_down_xfermask_limit(struct ata_device *dev, unsigned int sel) |
cf176e1a | 2782 | { |
458337db TH |
2783 | char buf[32]; |
2784 | unsigned int orig_mask, xfer_mask; | |
2785 | unsigned int pio_mask, mwdma_mask, udma_mask; | |
2786 | int quiet, highbit; | |
cf176e1a | 2787 | |
458337db TH |
2788 | quiet = !!(sel & ATA_DNXFER_QUIET); |
2789 | sel &= ~ATA_DNXFER_QUIET; | |
cf176e1a | 2790 | |
458337db TH |
2791 | xfer_mask = orig_mask = ata_pack_xfermask(dev->pio_mask, |
2792 | dev->mwdma_mask, | |
2793 | dev->udma_mask); | |
2794 | ata_unpack_xfermask(xfer_mask, &pio_mask, &mwdma_mask, &udma_mask); | |
cf176e1a | 2795 | |
458337db TH |
2796 | switch (sel) { |
2797 | case ATA_DNXFER_PIO: | |
2798 | highbit = fls(pio_mask) - 1; | |
2799 | pio_mask &= ~(1 << highbit); | |
2800 | break; | |
2801 | ||
2802 | case ATA_DNXFER_DMA: | |
2803 | if (udma_mask) { | |
2804 | highbit = fls(udma_mask) - 1; | |
2805 | udma_mask &= ~(1 << highbit); | |
2806 | if (!udma_mask) | |
2807 | return -ENOENT; | |
2808 | } else if (mwdma_mask) { | |
2809 | highbit = fls(mwdma_mask) - 1; | |
2810 | mwdma_mask &= ~(1 << highbit); | |
2811 | if (!mwdma_mask) | |
2812 | return -ENOENT; | |
2813 | } | |
2814 | break; | |
2815 | ||
2816 | case ATA_DNXFER_40C: | |
2817 | udma_mask &= ATA_UDMA_MASK_40C; | |
2818 | break; | |
2819 | ||
2820 | case ATA_DNXFER_FORCE_PIO0: | |
2821 | pio_mask &= 1; | |
2822 | case ATA_DNXFER_FORCE_PIO: | |
2823 | mwdma_mask = 0; | |
2824 | udma_mask = 0; | |
2825 | break; | |
2826 | ||
458337db TH |
2827 | default: |
2828 | BUG(); | |
2829 | } | |
2830 | ||
2831 | xfer_mask &= ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask); | |
2832 | ||
2833 | if (!(xfer_mask & ATA_MASK_PIO) || xfer_mask == orig_mask) | |
2834 | return -ENOENT; | |
2835 | ||
2836 | if (!quiet) { | |
2837 | if (xfer_mask & (ATA_MASK_MWDMA | ATA_MASK_UDMA)) | |
2838 | snprintf(buf, sizeof(buf), "%s:%s", | |
2839 | ata_mode_string(xfer_mask), | |
2840 | ata_mode_string(xfer_mask & ATA_MASK_PIO)); | |
2841 | else | |
2842 | snprintf(buf, sizeof(buf), "%s", | |
2843 | ata_mode_string(xfer_mask)); | |
2844 | ||
2845 | ata_dev_printk(dev, KERN_WARNING, | |
2846 | "limiting speed to %s\n", buf); | |
2847 | } | |
cf176e1a TH |
2848 | |
2849 | ata_unpack_xfermask(xfer_mask, &dev->pio_mask, &dev->mwdma_mask, | |
2850 | &dev->udma_mask); | |
2851 | ||
cf176e1a | 2852 | return 0; |
cf176e1a TH |
2853 | } |
2854 | ||
3373efd8 | 2855 | static int ata_dev_set_mode(struct ata_device *dev) |
1da177e4 | 2856 | { |
9af5c9c9 | 2857 | struct ata_eh_context *ehc = &dev->link->eh_context; |
83206a29 TH |
2858 | unsigned int err_mask; |
2859 | int rc; | |
1da177e4 | 2860 | |
e8384607 | 2861 | dev->flags &= ~ATA_DFLAG_PIO; |
1da177e4 LT |
2862 | if (dev->xfer_shift == ATA_SHIFT_PIO) |
2863 | dev->flags |= ATA_DFLAG_PIO; | |
2864 | ||
3373efd8 | 2865 | err_mask = ata_dev_set_xfermode(dev); |
11750a40 A |
2866 | /* Old CFA may refuse this command, which is just fine */ |
2867 | if (dev->xfer_shift == ATA_SHIFT_PIO && ata_id_is_cfa(dev->id)) | |
2868 | err_mask &= ~AC_ERR_DEV; | |
0bc2a79a AC |
2869 | /* Some very old devices and some bad newer ones fail any kind of |
2870 | SET_XFERMODE request but support PIO0-2 timings and no IORDY */ | |
2871 | if (dev->xfer_shift == ATA_SHIFT_PIO && !ata_id_has_iordy(dev->id) && | |
2872 | dev->pio_mode <= XFER_PIO_2) | |
2873 | err_mask &= ~AC_ERR_DEV; | |
83206a29 | 2874 | if (err_mask) { |
f15a1daf TH |
2875 | ata_dev_printk(dev, KERN_ERR, "failed to set xfermode " |
2876 | "(err_mask=0x%x)\n", err_mask); | |
83206a29 TH |
2877 | return -EIO; |
2878 | } | |
1da177e4 | 2879 | |
baa1e78a | 2880 | ehc->i.flags |= ATA_EHI_POST_SETMODE; |
422c9daa | 2881 | rc = ata_dev_revalidate(dev, ATA_DEV_UNKNOWN, 0); |
baa1e78a | 2882 | ehc->i.flags &= ~ATA_EHI_POST_SETMODE; |
5eb45c02 | 2883 | if (rc) |
83206a29 | 2884 | return rc; |
48a8a14f | 2885 | |
23e71c3d TH |
2886 | DPRINTK("xfer_shift=%u, xfer_mode=0x%x\n", |
2887 | dev->xfer_shift, (int)dev->xfer_mode); | |
1da177e4 | 2888 | |
f15a1daf TH |
2889 | ata_dev_printk(dev, KERN_INFO, "configured for %s\n", |
2890 | ata_mode_string(ata_xfer_mode2mask(dev->xfer_mode))); | |
83206a29 | 2891 | return 0; |
1da177e4 LT |
2892 | } |
2893 | ||
1da177e4 | 2894 | /** |
04351821 | 2895 | * ata_do_set_mode - Program timings and issue SET FEATURES - XFER |
0260731f | 2896 | * @link: link on which timings will be programmed |
e82cbdb9 | 2897 | * @r_failed_dev: out paramter for failed device |
1da177e4 | 2898 | * |
04351821 A |
2899 | * Standard implementation of the function used to tune and set |
2900 | * ATA device disk transfer mode (PIO3, UDMA6, etc.). If | |
2901 | * ata_dev_set_mode() fails, pointer to the failing device is | |
e82cbdb9 | 2902 | * returned in @r_failed_dev. |
780a87f7 | 2903 | * |
1da177e4 | 2904 | * LOCKING: |
0cba632b | 2905 | * PCI/etc. bus probe sem. |
e82cbdb9 TH |
2906 | * |
2907 | * RETURNS: | |
2908 | * 0 on success, negative errno otherwise | |
1da177e4 | 2909 | */ |
04351821 | 2910 | |
0260731f | 2911 | int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev) |
1da177e4 | 2912 | { |
0260731f | 2913 | struct ata_port *ap = link->ap; |
e8e0619f | 2914 | struct ata_device *dev; |
f58229f8 | 2915 | int rc = 0, used_dma = 0, found = 0; |
3adcebb2 | 2916 | |
a6d5a51c | 2917 | /* step 1: calculate xfer_mask */ |
f58229f8 | 2918 | ata_link_for_each_dev(dev, link) { |
acf356b1 | 2919 | unsigned int pio_mask, dma_mask; |
a6d5a51c | 2920 | |
e1211e3f | 2921 | if (!ata_dev_enabled(dev)) |
a6d5a51c TH |
2922 | continue; |
2923 | ||
3373efd8 | 2924 | ata_dev_xfermask(dev); |
1da177e4 | 2925 | |
acf356b1 TH |
2926 | pio_mask = ata_pack_xfermask(dev->pio_mask, 0, 0); |
2927 | dma_mask = ata_pack_xfermask(0, dev->mwdma_mask, dev->udma_mask); | |
2928 | dev->pio_mode = ata_xfer_mask2mode(pio_mask); | |
2929 | dev->dma_mode = ata_xfer_mask2mode(dma_mask); | |
5444a6f4 | 2930 | |
4f65977d | 2931 | found = 1; |
5444a6f4 AC |
2932 | if (dev->dma_mode) |
2933 | used_dma = 1; | |
a6d5a51c | 2934 | } |
4f65977d | 2935 | if (!found) |
e82cbdb9 | 2936 | goto out; |
a6d5a51c TH |
2937 | |
2938 | /* step 2: always set host PIO timings */ | |
f58229f8 | 2939 | ata_link_for_each_dev(dev, link) { |
e8e0619f TH |
2940 | if (!ata_dev_enabled(dev)) |
2941 | continue; | |
2942 | ||
2943 | if (!dev->pio_mode) { | |
f15a1daf | 2944 | ata_dev_printk(dev, KERN_WARNING, "no PIO support\n"); |
e8e0619f | 2945 | rc = -EINVAL; |
e82cbdb9 | 2946 | goto out; |
e8e0619f TH |
2947 | } |
2948 | ||
2949 | dev->xfer_mode = dev->pio_mode; | |
2950 | dev->xfer_shift = ATA_SHIFT_PIO; | |
2951 | if (ap->ops->set_piomode) | |
2952 | ap->ops->set_piomode(ap, dev); | |
2953 | } | |
1da177e4 | 2954 | |
a6d5a51c | 2955 | /* step 3: set host DMA timings */ |
f58229f8 | 2956 | ata_link_for_each_dev(dev, link) { |
e8e0619f TH |
2957 | if (!ata_dev_enabled(dev) || !dev->dma_mode) |
2958 | continue; | |
2959 | ||
2960 | dev->xfer_mode = dev->dma_mode; | |
2961 | dev->xfer_shift = ata_xfer_mode2shift(dev->dma_mode); | |
2962 | if (ap->ops->set_dmamode) | |
2963 | ap->ops->set_dmamode(ap, dev); | |
2964 | } | |
1da177e4 LT |
2965 | |
2966 | /* step 4: update devices' xfer mode */ | |
f58229f8 | 2967 | ata_link_for_each_dev(dev, link) { |
18d90deb | 2968 | /* don't update suspended devices' xfer mode */ |
9666f400 | 2969 | if (!ata_dev_enabled(dev)) |
83206a29 TH |
2970 | continue; |
2971 | ||
3373efd8 | 2972 | rc = ata_dev_set_mode(dev); |
5bbc53f4 | 2973 | if (rc) |
e82cbdb9 | 2974 | goto out; |
83206a29 | 2975 | } |
1da177e4 | 2976 | |
e8e0619f TH |
2977 | /* Record simplex status. If we selected DMA then the other |
2978 | * host channels are not permitted to do so. | |
5444a6f4 | 2979 | */ |
cca3974e | 2980 | if (used_dma && (ap->host->flags & ATA_HOST_SIMPLEX)) |
032af1ce | 2981 | ap->host->simplex_claimed = ap; |
5444a6f4 | 2982 | |
e82cbdb9 TH |
2983 | out: |
2984 | if (rc) | |
2985 | *r_failed_dev = dev; | |
2986 | return rc; | |
1da177e4 LT |
2987 | } |
2988 | ||
04351821 A |
2989 | /** |
2990 | * ata_set_mode - Program timings and issue SET FEATURES - XFER | |
0260731f | 2991 | * @link: link on which timings will be programmed |
04351821 A |
2992 | * @r_failed_dev: out paramter for failed device |
2993 | * | |
2994 | * Set ATA device disk transfer mode (PIO3, UDMA6, etc.). If | |
2995 | * ata_set_mode() fails, pointer to the failing device is | |
2996 | * returned in @r_failed_dev. | |
2997 | * | |
2998 | * LOCKING: | |
2999 | * PCI/etc. bus probe sem. | |
3000 | * | |
3001 | * RETURNS: | |
3002 | * 0 on success, negative errno otherwise | |
3003 | */ | |
0260731f | 3004 | int ata_set_mode(struct ata_link *link, struct ata_device **r_failed_dev) |
04351821 | 3005 | { |
0260731f TH |
3006 | struct ata_port *ap = link->ap; |
3007 | ||
04351821 A |
3008 | /* has private set_mode? */ |
3009 | if (ap->ops->set_mode) | |
0260731f TH |
3010 | return ap->ops->set_mode(link, r_failed_dev); |
3011 | return ata_do_set_mode(link, r_failed_dev); | |
04351821 A |
3012 | } |
3013 | ||
1fdffbce JG |
3014 | /** |
3015 | * ata_tf_to_host - issue ATA taskfile to host controller | |
3016 | * @ap: port to which command is being issued | |
3017 | * @tf: ATA taskfile register set | |
3018 | * | |
3019 | * Issues ATA taskfile register set to ATA host controller, | |
3020 | * with proper synchronization with interrupt handler and | |
3021 | * other threads. | |
3022 | * | |
3023 | * LOCKING: | |
cca3974e | 3024 | * spin_lock_irqsave(host lock) |
1fdffbce JG |
3025 | */ |
3026 | ||
3027 | static inline void ata_tf_to_host(struct ata_port *ap, | |
3028 | const struct ata_taskfile *tf) | |
3029 | { | |
3030 | ap->ops->tf_load(ap, tf); | |
3031 | ap->ops->exec_command(ap, tf); | |
3032 | } | |
3033 | ||
1da177e4 LT |
3034 | /** |
3035 | * ata_busy_sleep - sleep until BSY clears, or timeout | |
3036 | * @ap: port containing status register to be polled | |
3037 | * @tmout_pat: impatience timeout | |
3038 | * @tmout: overall timeout | |
3039 | * | |
780a87f7 JG |
3040 | * Sleep until ATA Status register bit BSY clears, |
3041 | * or a timeout occurs. | |
3042 | * | |
d1adc1bb TH |
3043 | * LOCKING: |
3044 | * Kernel thread context (may sleep). | |
3045 | * | |
3046 | * RETURNS: | |
3047 | * 0 on success, -errno otherwise. | |
1da177e4 | 3048 | */ |
d1adc1bb TH |
3049 | int ata_busy_sleep(struct ata_port *ap, |
3050 | unsigned long tmout_pat, unsigned long tmout) | |
1da177e4 LT |
3051 | { |
3052 | unsigned long timer_start, timeout; | |
3053 | u8 status; | |
3054 | ||
3055 | status = ata_busy_wait(ap, ATA_BUSY, 300); | |
3056 | timer_start = jiffies; | |
3057 | timeout = timer_start + tmout_pat; | |
d1adc1bb TH |
3058 | while (status != 0xff && (status & ATA_BUSY) && |
3059 | time_before(jiffies, timeout)) { | |
1da177e4 LT |
3060 | msleep(50); |
3061 | status = ata_busy_wait(ap, ATA_BUSY, 3); | |
3062 | } | |
3063 | ||
d1adc1bb | 3064 | if (status != 0xff && (status & ATA_BUSY)) |
f15a1daf | 3065 | ata_port_printk(ap, KERN_WARNING, |
35aa7a43 JG |
3066 | "port is slow to respond, please be patient " |
3067 | "(Status 0x%x)\n", status); | |
1da177e4 LT |
3068 | |
3069 | timeout = timer_start + tmout; | |
d1adc1bb TH |
3070 | while (status != 0xff && (status & ATA_BUSY) && |
3071 | time_before(jiffies, timeout)) { | |
1da177e4 LT |
3072 | msleep(50); |
3073 | status = ata_chk_status(ap); | |
3074 | } | |
3075 | ||
d1adc1bb TH |
3076 | if (status == 0xff) |
3077 | return -ENODEV; | |
3078 | ||
1da177e4 | 3079 | if (status & ATA_BUSY) { |
f15a1daf | 3080 | ata_port_printk(ap, KERN_ERR, "port failed to respond " |
35aa7a43 JG |
3081 | "(%lu secs, Status 0x%x)\n", |
3082 | tmout / HZ, status); | |
d1adc1bb | 3083 | return -EBUSY; |
1da177e4 LT |
3084 | } |
3085 | ||
3086 | return 0; | |
3087 | } | |
3088 | ||
d4b2bab4 TH |
3089 | /** |
3090 | * ata_wait_ready - sleep until BSY clears, or timeout | |
3091 | * @ap: port containing status register to be polled | |
3092 | * @deadline: deadline jiffies for the operation | |
3093 | * | |
3094 | * Sleep until ATA Status register bit BSY clears, or timeout | |
3095 | * occurs. | |
3096 | * | |
3097 | * LOCKING: | |
3098 | * Kernel thread context (may sleep). | |
3099 | * | |
3100 | * RETURNS: | |
3101 | * 0 on success, -errno otherwise. | |
3102 | */ | |
3103 | int ata_wait_ready(struct ata_port *ap, unsigned long deadline) | |
3104 | { | |
3105 | unsigned long start = jiffies; | |
3106 | int warned = 0; | |
3107 | ||
3108 | while (1) { | |
3109 | u8 status = ata_chk_status(ap); | |
3110 | unsigned long now = jiffies; | |
3111 | ||
3112 | if (!(status & ATA_BUSY)) | |
3113 | return 0; | |
936fd732 | 3114 | if (!ata_link_online(&ap->link) && status == 0xff) |
d4b2bab4 TH |
3115 | return -ENODEV; |
3116 | if (time_after(now, deadline)) | |
3117 | return -EBUSY; | |
3118 | ||
3119 | if (!warned && time_after(now, start + 5 * HZ) && | |
3120 | (deadline - now > 3 * HZ)) { | |
3121 | ata_port_printk(ap, KERN_WARNING, | |
3122 | "port is slow to respond, please be patient " | |
3123 | "(Status 0x%x)\n", status); | |
3124 | warned = 1; | |
3125 | } | |
3126 | ||
3127 | msleep(50); | |
3128 | } | |
3129 | } | |
3130 | ||
3131 | static int ata_bus_post_reset(struct ata_port *ap, unsigned int devmask, | |
3132 | unsigned long deadline) | |
1da177e4 LT |
3133 | { |
3134 | struct ata_ioports *ioaddr = &ap->ioaddr; | |
3135 | unsigned int dev0 = devmask & (1 << 0); | |
3136 | unsigned int dev1 = devmask & (1 << 1); | |
9b89391c | 3137 | int rc, ret = 0; |
1da177e4 LT |
3138 | |
3139 | /* if device 0 was found in ata_devchk, wait for its | |
3140 | * BSY bit to clear | |
3141 | */ | |
d4b2bab4 TH |
3142 | if (dev0) { |
3143 | rc = ata_wait_ready(ap, deadline); | |
9b89391c TH |
3144 | if (rc) { |
3145 | if (rc != -ENODEV) | |
3146 | return rc; | |
3147 | ret = rc; | |
3148 | } | |
d4b2bab4 | 3149 | } |
1da177e4 | 3150 | |
e141d999 TH |
3151 | /* if device 1 was found in ata_devchk, wait for register |
3152 | * access briefly, then wait for BSY to clear. | |
1da177e4 | 3153 | */ |
e141d999 TH |
3154 | if (dev1) { |
3155 | int i; | |
1da177e4 LT |
3156 | |
3157 | ap->ops->dev_select(ap, 1); | |
e141d999 TH |
3158 | |
3159 | /* Wait for register access. Some ATAPI devices fail | |
3160 | * to set nsect/lbal after reset, so don't waste too | |
3161 | * much time on it. We're gonna wait for !BSY anyway. | |
3162 | */ | |
3163 | for (i = 0; i < 2; i++) { | |
3164 | u8 nsect, lbal; | |
3165 | ||
3166 | nsect = ioread8(ioaddr->nsect_addr); | |
3167 | lbal = ioread8(ioaddr->lbal_addr); | |
3168 | if ((nsect == 1) && (lbal == 1)) | |
3169 | break; | |
3170 | msleep(50); /* give drive a breather */ | |
3171 | } | |
3172 | ||
d4b2bab4 | 3173 | rc = ata_wait_ready(ap, deadline); |
9b89391c TH |
3174 | if (rc) { |
3175 | if (rc != -ENODEV) | |
3176 | return rc; | |
3177 | ret = rc; | |
3178 | } | |
d4b2bab4 | 3179 | } |
1da177e4 LT |
3180 | |
3181 | /* is all this really necessary? */ | |
3182 | ap->ops->dev_select(ap, 0); | |
3183 | if (dev1) | |
3184 | ap->ops->dev_select(ap, 1); | |
3185 | if (dev0) | |
3186 | ap->ops->dev_select(ap, 0); | |
d4b2bab4 | 3187 | |
9b89391c | 3188 | return ret; |
1da177e4 LT |
3189 | } |
3190 | ||
d4b2bab4 TH |
3191 | static int ata_bus_softreset(struct ata_port *ap, unsigned int devmask, |
3192 | unsigned long deadline) | |
1da177e4 LT |
3193 | { |
3194 | struct ata_ioports *ioaddr = &ap->ioaddr; | |
3195 | ||
44877b4e | 3196 | DPRINTK("ata%u: bus reset via SRST\n", ap->print_id); |
1da177e4 LT |
3197 | |
3198 | /* software reset. causes dev0 to be selected */ | |
0d5ff566 TH |
3199 | iowrite8(ap->ctl, ioaddr->ctl_addr); |
3200 | udelay(20); /* FIXME: flush */ | |
3201 | iowrite8(ap->ctl | ATA_SRST, ioaddr->ctl_addr); | |
3202 | udelay(20); /* FIXME: flush */ | |
3203 | iowrite8(ap->ctl, ioaddr->ctl_addr); | |
1da177e4 LT |
3204 | |
3205 | /* spec mandates ">= 2ms" before checking status. | |
3206 | * We wait 150ms, because that was the magic delay used for | |
3207 | * ATAPI devices in Hale Landis's ATADRVR, for the period of time | |
3208 | * between when the ATA command register is written, and then | |
3209 | * status is checked. Because waiting for "a while" before | |
3210 | * checking status is fine, post SRST, we perform this magic | |
3211 | * delay here as well. | |
09c7ad79 AC |
3212 | * |
3213 | * Old drivers/ide uses the 2mS rule and then waits for ready | |
1da177e4 LT |
3214 | */ |
3215 | msleep(150); | |
3216 | ||
2e9edbf8 | 3217 | /* Before we perform post reset processing we want to see if |
298a41ca TH |
3218 | * the bus shows 0xFF because the odd clown forgets the D7 |
3219 | * pulldown resistor. | |
3220 | */ | |
d1adc1bb | 3221 | if (ata_check_status(ap) == 0xFF) |
9b89391c | 3222 | return -ENODEV; |
09c7ad79 | 3223 | |
d4b2bab4 | 3224 | return ata_bus_post_reset(ap, devmask, deadline); |
1da177e4 LT |
3225 | } |
3226 | ||
3227 | /** | |
3228 | * ata_bus_reset - reset host port and associated ATA channel | |
3229 | * @ap: port to reset | |
3230 | * | |
3231 | * This is typically the first time we actually start issuing | |
3232 | * commands to the ATA channel. We wait for BSY to clear, then | |
3233 | * issue EXECUTE DEVICE DIAGNOSTIC command, polling for its | |
3234 | * result. Determine what devices, if any, are on the channel | |
3235 | * by looking at the device 0/1 error register. Look at the signature | |
3236 | * stored in each device's taskfile registers, to determine if | |
3237 | * the device is ATA or ATAPI. | |
3238 | * | |
3239 | * LOCKING: | |
0cba632b | 3240 | * PCI/etc. bus probe sem. |
cca3974e | 3241 | * Obtains host lock. |
1da177e4 LT |
3242 | * |
3243 | * SIDE EFFECTS: | |
198e0fed | 3244 | * Sets ATA_FLAG_DISABLED if bus reset fails. |
1da177e4 LT |
3245 | */ |
3246 | ||
3247 | void ata_bus_reset(struct ata_port *ap) | |
3248 | { | |
9af5c9c9 | 3249 | struct ata_device *device = ap->link.device; |
1da177e4 LT |
3250 | struct ata_ioports *ioaddr = &ap->ioaddr; |
3251 | unsigned int slave_possible = ap->flags & ATA_FLAG_SLAVE_POSS; | |
3252 | u8 err; | |
aec5c3c1 | 3253 | unsigned int dev0, dev1 = 0, devmask = 0; |
9b89391c | 3254 | int rc; |
1da177e4 | 3255 | |
44877b4e | 3256 | DPRINTK("ENTER, host %u, port %u\n", ap->print_id, ap->port_no); |
1da177e4 LT |
3257 | |
3258 | /* determine if device 0/1 are present */ | |
3259 | if (ap->flags & ATA_FLAG_SATA_RESET) | |
3260 | dev0 = 1; | |
3261 | else { | |
3262 | dev0 = ata_devchk(ap, 0); | |
3263 | if (slave_possible) | |
3264 | dev1 = ata_devchk(ap, 1); | |
3265 | } | |
3266 | ||
3267 | if (dev0) | |
3268 | devmask |= (1 << 0); | |
3269 | if (dev1) | |
3270 | devmask |= (1 << 1); | |
3271 | ||
3272 | /* select device 0 again */ | |
3273 | ap->ops->dev_select(ap, 0); | |
3274 | ||
3275 | /* issue bus reset */ | |
9b89391c TH |
3276 | if (ap->flags & ATA_FLAG_SRST) { |
3277 | rc = ata_bus_softreset(ap, devmask, jiffies + 40 * HZ); | |
3278 | if (rc && rc != -ENODEV) | |
aec5c3c1 | 3279 | goto err_out; |
9b89391c | 3280 | } |
1da177e4 LT |
3281 | |
3282 | /* | |
3283 | * determine by signature whether we have ATA or ATAPI devices | |
3284 | */ | |
3f19859e | 3285 | device[0].class = ata_dev_try_classify(&device[0], dev0, &err); |
1da177e4 | 3286 | if ((slave_possible) && (err != 0x81)) |
3f19859e | 3287 | device[1].class = ata_dev_try_classify(&device[1], dev1, &err); |
1da177e4 | 3288 | |
1da177e4 | 3289 | /* is double-select really necessary? */ |
9af5c9c9 | 3290 | if (device[1].class != ATA_DEV_NONE) |
1da177e4 | 3291 | ap->ops->dev_select(ap, 1); |
9af5c9c9 | 3292 | if (device[0].class != ATA_DEV_NONE) |
1da177e4 LT |
3293 | ap->ops->dev_select(ap, 0); |
3294 | ||
3295 | /* if no devices were detected, disable this port */ | |
9af5c9c9 TH |
3296 | if ((device[0].class == ATA_DEV_NONE) && |
3297 | (device[1].class == ATA_DEV_NONE)) | |
1da177e4 LT |
3298 | goto err_out; |
3299 | ||
3300 | if (ap->flags & (ATA_FLAG_SATA_RESET | ATA_FLAG_SRST)) { | |
3301 | /* set up device control for ATA_FLAG_SATA_RESET */ | |
0d5ff566 | 3302 | iowrite8(ap->ctl, ioaddr->ctl_addr); |
1da177e4 LT |
3303 | } |
3304 | ||
3305 | DPRINTK("EXIT\n"); | |
3306 | return; | |
3307 | ||
3308 | err_out: | |
f15a1daf | 3309 | ata_port_printk(ap, KERN_ERR, "disabling port\n"); |
ac8869d5 | 3310 | ata_port_disable(ap); |
1da177e4 LT |
3311 | |
3312 | DPRINTK("EXIT\n"); | |
3313 | } | |
3314 | ||
d7bb4cc7 | 3315 | /** |
936fd732 TH |
3316 | * sata_link_debounce - debounce SATA phy status |
3317 | * @link: ATA link to debounce SATA phy status for | |
d7bb4cc7 | 3318 | * @params: timing parameters { interval, duratinon, timeout } in msec |
d4b2bab4 | 3319 | * @deadline: deadline jiffies for the operation |
d7bb4cc7 | 3320 | * |
936fd732 | 3321 | * Make sure SStatus of @link reaches stable state, determined by |
d7bb4cc7 TH |
3322 | * holding the same value where DET is not 1 for @duration polled |
3323 | * every @interval, before @timeout. Timeout constraints the | |
d4b2bab4 TH |
3324 | * beginning of the stable state. Because DET gets stuck at 1 on |
3325 | * some controllers after hot unplugging, this functions waits | |
d7bb4cc7 TH |
3326 | * until timeout then returns 0 if DET is stable at 1. |
3327 | * | |
d4b2bab4 TH |
3328 | * @timeout is further limited by @deadline. The sooner of the |
3329 | * two is used. | |
3330 | * | |
d7bb4cc7 TH |
3331 | * LOCKING: |
3332 | * Kernel thread context (may sleep) | |
3333 | * | |
3334 | * RETURNS: | |
3335 | * 0 on success, -errno on failure. | |
3336 | */ | |
936fd732 TH |
3337 | int sata_link_debounce(struct ata_link *link, const unsigned long *params, |
3338 | unsigned long deadline) | |
7a7921e8 | 3339 | { |
d7bb4cc7 | 3340 | unsigned long interval_msec = params[0]; |
d4b2bab4 TH |
3341 | unsigned long duration = msecs_to_jiffies(params[1]); |
3342 | unsigned long last_jiffies, t; | |
d7bb4cc7 TH |
3343 | u32 last, cur; |
3344 | int rc; | |
3345 | ||
d4b2bab4 TH |
3346 | t = jiffies + msecs_to_jiffies(params[2]); |
3347 | if (time_before(t, deadline)) | |
3348 | deadline = t; | |
3349 | ||
936fd732 | 3350 | if ((rc = sata_scr_read(link, SCR_STATUS, &cur))) |
d7bb4cc7 TH |
3351 | return rc; |
3352 | cur &= 0xf; | |
3353 | ||
3354 | last = cur; | |
3355 | last_jiffies = jiffies; | |
3356 | ||
3357 | while (1) { | |
3358 | msleep(interval_msec); | |
936fd732 | 3359 | if ((rc = sata_scr_read(link, SCR_STATUS, &cur))) |
d7bb4cc7 TH |
3360 | return rc; |
3361 | cur &= 0xf; | |
3362 | ||
3363 | /* DET stable? */ | |
3364 | if (cur == last) { | |
d4b2bab4 | 3365 | if (cur == 1 && time_before(jiffies, deadline)) |
d7bb4cc7 TH |
3366 | continue; |
3367 | if (time_after(jiffies, last_jiffies + duration)) | |
3368 | return 0; | |
3369 | continue; | |
3370 | } | |
3371 | ||
3372 | /* unstable, start over */ | |
3373 | last = cur; | |
3374 | last_jiffies = jiffies; | |
3375 | ||
f1545154 TH |
3376 | /* Check deadline. If debouncing failed, return |
3377 | * -EPIPE to tell upper layer to lower link speed. | |
3378 | */ | |
d4b2bab4 | 3379 | if (time_after(jiffies, deadline)) |
f1545154 | 3380 | return -EPIPE; |
d7bb4cc7 TH |
3381 | } |
3382 | } | |
3383 | ||
3384 | /** | |
936fd732 TH |
3385 | * sata_link_resume - resume SATA link |
3386 | * @link: ATA link to resume SATA | |
d7bb4cc7 | 3387 | * @params: timing parameters { interval, duratinon, timeout } in msec |
d4b2bab4 | 3388 | * @deadline: deadline jiffies for the operation |
d7bb4cc7 | 3389 | * |
936fd732 | 3390 | * Resume SATA phy @link and debounce it. |
d7bb4cc7 TH |
3391 | * |
3392 | * LOCKING: | |
3393 | * Kernel thread context (may sleep) | |
3394 | * | |
3395 | * RETURNS: | |
3396 | * 0 on success, -errno on failure. | |
3397 | */ | |
936fd732 TH |
3398 | int sata_link_resume(struct ata_link *link, const unsigned long *params, |
3399 | unsigned long deadline) | |
d7bb4cc7 TH |
3400 | { |
3401 | u32 scontrol; | |
81952c54 TH |
3402 | int rc; |
3403 | ||
936fd732 | 3404 | if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol))) |
81952c54 | 3405 | return rc; |
7a7921e8 | 3406 | |
852ee16a | 3407 | scontrol = (scontrol & 0x0f0) | 0x300; |
81952c54 | 3408 | |
936fd732 | 3409 | if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol))) |
81952c54 | 3410 | return rc; |
7a7921e8 | 3411 | |
d7bb4cc7 TH |
3412 | /* Some PHYs react badly if SStatus is pounded immediately |
3413 | * after resuming. Delay 200ms before debouncing. | |
3414 | */ | |
3415 | msleep(200); | |
7a7921e8 | 3416 | |
936fd732 | 3417 | return sata_link_debounce(link, params, deadline); |
7a7921e8 TH |
3418 | } |
3419 | ||
f5914a46 TH |
3420 | /** |
3421 | * ata_std_prereset - prepare for reset | |
cc0680a5 | 3422 | * @link: ATA link to be reset |
d4b2bab4 | 3423 | * @deadline: deadline jiffies for the operation |
f5914a46 | 3424 | * |
cc0680a5 | 3425 | * @link is about to be reset. Initialize it. Failure from |
b8cffc6a TH |
3426 | * prereset makes libata abort whole reset sequence and give up |
3427 | * that port, so prereset should be best-effort. It does its | |
3428 | * best to prepare for reset sequence but if things go wrong, it | |
3429 | * should just whine, not fail. | |
f5914a46 TH |
3430 | * |
3431 | * LOCKING: | |
3432 | * Kernel thread context (may sleep) | |
3433 | * | |
3434 | * RETURNS: | |
3435 | * 0 on success, -errno otherwise. | |
3436 | */ | |
cc0680a5 | 3437 | int ata_std_prereset(struct ata_link *link, unsigned long deadline) |
f5914a46 | 3438 | { |
cc0680a5 | 3439 | struct ata_port *ap = link->ap; |
936fd732 | 3440 | struct ata_eh_context *ehc = &link->eh_context; |
e9c83914 | 3441 | const unsigned long *timing = sata_ehc_deb_timing(ehc); |
f5914a46 TH |
3442 | int rc; |
3443 | ||
31daabda | 3444 | /* handle link resume */ |
28324304 | 3445 | if ((ehc->i.flags & ATA_EHI_RESUME_LINK) && |
0c88758b | 3446 | (link->flags & ATA_LFLAG_HRST_TO_RESUME)) |
28324304 TH |
3447 | ehc->i.action |= ATA_EH_HARDRESET; |
3448 | ||
633273a3 TH |
3449 | /* Some PMPs don't work with only SRST, force hardreset if PMP |
3450 | * is supported. | |
3451 | */ | |
3452 | if (ap->flags & ATA_FLAG_PMP) | |
3453 | ehc->i.action |= ATA_EH_HARDRESET; | |
3454 | ||
f5914a46 TH |
3455 | /* if we're about to do hardreset, nothing more to do */ |
3456 | if (ehc->i.action & ATA_EH_HARDRESET) | |
3457 | return 0; | |
3458 | ||
936fd732 | 3459 | /* if SATA, resume link */ |
a16abc0b | 3460 | if (ap->flags & ATA_FLAG_SATA) { |
936fd732 | 3461 | rc = sata_link_resume(link, timing, deadline); |
b8cffc6a TH |
3462 | /* whine about phy resume failure but proceed */ |
3463 | if (rc && rc != -EOPNOTSUPP) | |
cc0680a5 | 3464 | ata_link_printk(link, KERN_WARNING, "failed to resume " |
f5914a46 | 3465 | "link for reset (errno=%d)\n", rc); |
f5914a46 TH |
3466 | } |
3467 | ||
3468 | /* Wait for !BSY if the controller can wait for the first D2H | |
3469 | * Reg FIS and we don't know that no device is attached. | |
3470 | */ | |
0c88758b | 3471 | if (!(link->flags & ATA_LFLAG_SKIP_D2H_BSY) && !ata_link_offline(link)) { |
b8cffc6a | 3472 | rc = ata_wait_ready(ap, deadline); |
6dffaf61 | 3473 | if (rc && rc != -ENODEV) { |
cc0680a5 | 3474 | ata_link_printk(link, KERN_WARNING, "device not ready " |
b8cffc6a TH |
3475 | "(errno=%d), forcing hardreset\n", rc); |
3476 | ehc->i.action |= ATA_EH_HARDRESET; | |
3477 | } | |
3478 | } | |
f5914a46 TH |
3479 | |
3480 | return 0; | |
3481 | } | |
3482 | ||
c2bd5804 TH |
3483 | /** |
3484 | * ata_std_softreset - reset host port via ATA SRST | |
cc0680a5 | 3485 | * @link: ATA link to reset |
c2bd5804 | 3486 | * @classes: resulting classes of attached devices |
d4b2bab4 | 3487 | * @deadline: deadline jiffies for the operation |
c2bd5804 | 3488 | * |
52783c5d | 3489 | * Reset host port using ATA SRST. |
c2bd5804 TH |
3490 | * |
3491 | * LOCKING: | |
3492 | * Kernel thread context (may sleep) | |
3493 | * | |
3494 | * RETURNS: | |
3495 | * 0 on success, -errno otherwise. | |
3496 | */ | |
cc0680a5 | 3497 | int ata_std_softreset(struct ata_link *link, unsigned int *classes, |
d4b2bab4 | 3498 | unsigned long deadline) |
c2bd5804 | 3499 | { |
cc0680a5 | 3500 | struct ata_port *ap = link->ap; |
c2bd5804 | 3501 | unsigned int slave_possible = ap->flags & ATA_FLAG_SLAVE_POSS; |
d4b2bab4 TH |
3502 | unsigned int devmask = 0; |
3503 | int rc; | |
c2bd5804 TH |
3504 | u8 err; |
3505 | ||
3506 | DPRINTK("ENTER\n"); | |
3507 | ||
936fd732 | 3508 | if (ata_link_offline(link)) { |
3a39746a TH |
3509 | classes[0] = ATA_DEV_NONE; |
3510 | goto out; | |
3511 | } | |
3512 | ||
c2bd5804 TH |
3513 | /* determine if device 0/1 are present */ |
3514 | if (ata_devchk(ap, 0)) | |
3515 | devmask |= (1 << 0); | |
3516 | if (slave_possible && ata_devchk(ap, 1)) | |
3517 | devmask |= (1 << 1); | |
3518 | ||
c2bd5804 TH |
3519 | /* select device 0 again */ |
3520 | ap->ops->dev_select(ap, 0); | |
3521 | ||
3522 | /* issue bus reset */ | |
3523 | DPRINTK("about to softreset, devmask=%x\n", devmask); | |
d4b2bab4 | 3524 | rc = ata_bus_softreset(ap, devmask, deadline); |
9b89391c | 3525 | /* if link is occupied, -ENODEV too is an error */ |
936fd732 | 3526 | if (rc && (rc != -ENODEV || sata_scr_valid(link))) { |
cc0680a5 | 3527 | ata_link_printk(link, KERN_ERR, "SRST failed (errno=%d)\n", rc); |
d4b2bab4 | 3528 | return rc; |
c2bd5804 TH |
3529 | } |
3530 | ||
3531 | /* determine by signature whether we have ATA or ATAPI devices */ | |
3f19859e TH |
3532 | classes[0] = ata_dev_try_classify(&link->device[0], |
3533 | devmask & (1 << 0), &err); | |
c2bd5804 | 3534 | if (slave_possible && err != 0x81) |
3f19859e TH |
3535 | classes[1] = ata_dev_try_classify(&link->device[1], |
3536 | devmask & (1 << 1), &err); | |
c2bd5804 | 3537 | |
3a39746a | 3538 | out: |
c2bd5804 TH |
3539 | DPRINTK("EXIT, classes[0]=%u [1]=%u\n", classes[0], classes[1]); |
3540 | return 0; | |
3541 | } | |
3542 | ||
3543 | /** | |
cc0680a5 TH |
3544 | * sata_link_hardreset - reset link via SATA phy reset |
3545 | * @link: link to reset | |
b6103f6d | 3546 | * @timing: timing parameters { interval, duratinon, timeout } in msec |
d4b2bab4 | 3547 | * @deadline: deadline jiffies for the operation |
c2bd5804 | 3548 | * |
cc0680a5 | 3549 | * SATA phy-reset @link using DET bits of SControl register. |
c2bd5804 TH |
3550 | * |
3551 | * LOCKING: | |
3552 | * Kernel thread context (may sleep) | |
3553 | * | |
3554 | * RETURNS: | |
3555 | * 0 on success, -errno otherwise. | |
3556 | */ | |
cc0680a5 | 3557 | int sata_link_hardreset(struct ata_link *link, const unsigned long *timing, |
d4b2bab4 | 3558 | unsigned long deadline) |
c2bd5804 | 3559 | { |
852ee16a | 3560 | u32 scontrol; |
81952c54 | 3561 | int rc; |
852ee16a | 3562 | |
c2bd5804 TH |
3563 | DPRINTK("ENTER\n"); |
3564 | ||
936fd732 | 3565 | if (sata_set_spd_needed(link)) { |
1c3fae4d TH |
3566 | /* SATA spec says nothing about how to reconfigure |
3567 | * spd. To be on the safe side, turn off phy during | |
3568 | * reconfiguration. This works for at least ICH7 AHCI | |
3569 | * and Sil3124. | |
3570 | */ | |
936fd732 | 3571 | if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol))) |
b6103f6d | 3572 | goto out; |
81952c54 | 3573 | |
a34b6fc0 | 3574 | scontrol = (scontrol & 0x0f0) | 0x304; |
81952c54 | 3575 | |
936fd732 | 3576 | if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol))) |
b6103f6d | 3577 | goto out; |
1c3fae4d | 3578 | |
936fd732 | 3579 | sata_set_spd(link); |
1c3fae4d TH |
3580 | } |
3581 | ||
3582 | /* issue phy wake/reset */ | |
936fd732 | 3583 | if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol))) |
b6103f6d | 3584 | goto out; |
81952c54 | 3585 | |
852ee16a | 3586 | scontrol = (scontrol & 0x0f0) | 0x301; |
81952c54 | 3587 | |
936fd732 | 3588 | if ((rc = sata_scr_write_flush(link, SCR_CONTROL, scontrol))) |
b6103f6d | 3589 | goto out; |
c2bd5804 | 3590 | |
1c3fae4d | 3591 | /* Couldn't find anything in SATA I/II specs, but AHCI-1.1 |
c2bd5804 TH |
3592 | * 10.4.2 says at least 1 ms. |
3593 | */ | |
3594 | msleep(1); | |
3595 | ||
936fd732 TH |
3596 | /* bring link back */ |
3597 | rc = sata_link_resume(link, timing, deadline); | |
b6103f6d TH |
3598 | out: |
3599 | DPRINTK("EXIT, rc=%d\n", rc); | |
3600 | return rc; | |
3601 | } | |
3602 | ||
3603 | /** | |
3604 | * sata_std_hardreset - reset host port via SATA phy reset | |
cc0680a5 | 3605 | * @link: link to reset |
b6103f6d | 3606 | * @class: resulting class of attached device |
d4b2bab4 | 3607 | * @deadline: deadline jiffies for the operation |
b6103f6d TH |
3608 | * |
3609 | * SATA phy-reset host port using DET bits of SControl register, | |
3610 | * wait for !BSY and classify the attached device. | |
3611 | * | |
3612 | * LOCKING: | |
3613 | * Kernel thread context (may sleep) | |
3614 | * | |
3615 | * RETURNS: | |
3616 | * 0 on success, -errno otherwise. | |
3617 | */ | |
cc0680a5 | 3618 | int sata_std_hardreset(struct ata_link *link, unsigned int *class, |
d4b2bab4 | 3619 | unsigned long deadline) |
b6103f6d | 3620 | { |
cc0680a5 | 3621 | struct ata_port *ap = link->ap; |
936fd732 | 3622 | const unsigned long *timing = sata_ehc_deb_timing(&link->eh_context); |
b6103f6d TH |
3623 | int rc; |
3624 | ||
3625 | DPRINTK("ENTER\n"); | |
3626 | ||
3627 | /* do hardreset */ | |
cc0680a5 | 3628 | rc = sata_link_hardreset(link, timing, deadline); |
b6103f6d | 3629 | if (rc) { |
cc0680a5 | 3630 | ata_link_printk(link, KERN_ERR, |
b6103f6d TH |
3631 | "COMRESET failed (errno=%d)\n", rc); |
3632 | return rc; | |
3633 | } | |
c2bd5804 | 3634 | |
c2bd5804 | 3635 | /* TODO: phy layer with polling, timeouts, etc. */ |
936fd732 | 3636 | if (ata_link_offline(link)) { |
c2bd5804 TH |
3637 | *class = ATA_DEV_NONE; |
3638 | DPRINTK("EXIT, link offline\n"); | |
3639 | return 0; | |
3640 | } | |
3641 | ||
34fee227 TH |
3642 | /* wait a while before checking status, see SRST for more info */ |
3643 | msleep(150); | |
3644 | ||
633273a3 TH |
3645 | /* If PMP is supported, we have to do follow-up SRST. Note |
3646 | * that some PMPs don't send D2H Reg FIS after hardreset at | |
3647 | * all if the first port is empty. Wait for it just for a | |
3648 | * second and request follow-up SRST. | |
3649 | */ | |
3650 | if (ap->flags & ATA_FLAG_PMP) { | |
3651 | ata_wait_ready(ap, jiffies + HZ); | |
3652 | return -EAGAIN; | |
3653 | } | |
3654 | ||
d4b2bab4 | 3655 | rc = ata_wait_ready(ap, deadline); |
9b89391c TH |
3656 | /* link occupied, -ENODEV too is an error */ |
3657 | if (rc) { | |
cc0680a5 | 3658 | ata_link_printk(link, KERN_ERR, |
d4b2bab4 TH |
3659 | "COMRESET failed (errno=%d)\n", rc); |
3660 | return rc; | |
c2bd5804 TH |
3661 | } |
3662 | ||
3a39746a TH |
3663 | ap->ops->dev_select(ap, 0); /* probably unnecessary */ |
3664 | ||
3f19859e | 3665 | *class = ata_dev_try_classify(link->device, 1, NULL); |
c2bd5804 TH |
3666 | |
3667 | DPRINTK("EXIT, class=%u\n", *class); | |
3668 | return 0; | |
3669 | } | |
3670 | ||
3671 | /** | |
3672 | * ata_std_postreset - standard postreset callback | |
cc0680a5 | 3673 | * @link: the target ata_link |
c2bd5804 TH |
3674 | * @classes: classes of attached devices |
3675 | * | |
3676 | * This function is invoked after a successful reset. Note that | |
3677 | * the device might have been reset more than once using | |
3678 | * different reset methods before postreset is invoked. | |
c2bd5804 | 3679 | * |
c2bd5804 TH |
3680 | * LOCKING: |
3681 | * Kernel thread context (may sleep) | |
3682 | */ | |
cc0680a5 | 3683 | void ata_std_postreset(struct ata_link *link, unsigned int *classes) |
c2bd5804 | 3684 | { |
cc0680a5 | 3685 | struct ata_port *ap = link->ap; |
dc2b3515 TH |
3686 | u32 serror; |
3687 | ||
c2bd5804 TH |
3688 | DPRINTK("ENTER\n"); |
3689 | ||
c2bd5804 | 3690 | /* print link status */ |
936fd732 | 3691 | sata_print_link_status(link); |
c2bd5804 | 3692 | |
dc2b3515 | 3693 | /* clear SError */ |
936fd732 TH |
3694 | if (sata_scr_read(link, SCR_ERROR, &serror) == 0) |
3695 | sata_scr_write(link, SCR_ERROR, serror); | |
dc2b3515 | 3696 | |
c2bd5804 TH |
3697 | /* is double-select really necessary? */ |
3698 | if (classes[0] != ATA_DEV_NONE) | |
3699 | ap->ops->dev_select(ap, 1); | |
3700 | if (classes[1] != ATA_DEV_NONE) | |
3701 | ap->ops->dev_select(ap, 0); | |
3702 | ||
3a39746a TH |
3703 | /* bail out if no device is present */ |
3704 | if (classes[0] == ATA_DEV_NONE && classes[1] == ATA_DEV_NONE) { | |
3705 | DPRINTK("EXIT, no device\n"); | |
3706 | return; | |
3707 | } | |
3708 | ||
3709 | /* set up device control */ | |
0d5ff566 TH |
3710 | if (ap->ioaddr.ctl_addr) |
3711 | iowrite8(ap->ctl, ap->ioaddr.ctl_addr); | |
c2bd5804 TH |
3712 | |
3713 | DPRINTK("EXIT\n"); | |
3714 | } | |
3715 | ||
623a3128 TH |
3716 | /** |
3717 | * ata_dev_same_device - Determine whether new ID matches configured device | |
623a3128 TH |
3718 | * @dev: device to compare against |
3719 | * @new_class: class of the new device | |
3720 | * @new_id: IDENTIFY page of the new device | |
3721 | * | |
3722 | * Compare @new_class and @new_id against @dev and determine | |
3723 | * whether @dev is the device indicated by @new_class and | |
3724 | * @new_id. | |
3725 | * | |
3726 | * LOCKING: | |
3727 | * None. | |
3728 | * | |
3729 | * RETURNS: | |
3730 | * 1 if @dev matches @new_class and @new_id, 0 otherwise. | |
3731 | */ | |
3373efd8 TH |
3732 | static int ata_dev_same_device(struct ata_device *dev, unsigned int new_class, |
3733 | const u16 *new_id) | |
623a3128 TH |
3734 | { |
3735 | const u16 *old_id = dev->id; | |
a0cf733b TH |
3736 | unsigned char model[2][ATA_ID_PROD_LEN + 1]; |
3737 | unsigned char serial[2][ATA_ID_SERNO_LEN + 1]; | |
623a3128 TH |
3738 | |
3739 | if (dev->class != new_class) { | |
f15a1daf TH |
3740 | ata_dev_printk(dev, KERN_INFO, "class mismatch %d != %d\n", |
3741 | dev->class, new_class); | |
623a3128 TH |
3742 | return 0; |
3743 | } | |
3744 | ||
a0cf733b TH |
3745 | ata_id_c_string(old_id, model[0], ATA_ID_PROD, sizeof(model[0])); |
3746 | ata_id_c_string(new_id, model[1], ATA_ID_PROD, sizeof(model[1])); | |
3747 | ata_id_c_string(old_id, serial[0], ATA_ID_SERNO, sizeof(serial[0])); | |
3748 | ata_id_c_string(new_id, serial[1], ATA_ID_SERNO, sizeof(serial[1])); | |
623a3128 TH |
3749 | |
3750 | if (strcmp(model[0], model[1])) { | |
f15a1daf TH |
3751 | ata_dev_printk(dev, KERN_INFO, "model number mismatch " |
3752 | "'%s' != '%s'\n", model[0], model[1]); | |
623a3128 TH |
3753 | return 0; |
3754 | } | |
3755 | ||
3756 | if (strcmp(serial[0], serial[1])) { | |
f15a1daf TH |
3757 | ata_dev_printk(dev, KERN_INFO, "serial number mismatch " |
3758 | "'%s' != '%s'\n", serial[0], serial[1]); | |
623a3128 TH |
3759 | return 0; |
3760 | } | |
3761 | ||
623a3128 TH |
3762 | return 1; |
3763 | } | |
3764 | ||
3765 | /** | |
fe30911b | 3766 | * ata_dev_reread_id - Re-read IDENTIFY data |
3fae450c | 3767 | * @dev: target ATA device |
bff04647 | 3768 | * @readid_flags: read ID flags |
623a3128 TH |
3769 | * |
3770 | * Re-read IDENTIFY page and make sure @dev is still attached to | |
3771 | * the port. | |
3772 | * | |
3773 | * LOCKING: | |
3774 | * Kernel thread context (may sleep) | |
3775 | * | |
3776 | * RETURNS: | |
3777 | * 0 on success, negative errno otherwise | |
3778 | */ | |
fe30911b | 3779 | int ata_dev_reread_id(struct ata_device *dev, unsigned int readid_flags) |
623a3128 | 3780 | { |
5eb45c02 | 3781 | unsigned int class = dev->class; |
9af5c9c9 | 3782 | u16 *id = (void *)dev->link->ap->sector_buf; |
623a3128 TH |
3783 | int rc; |
3784 | ||
fe635c7e | 3785 | /* read ID data */ |
bff04647 | 3786 | rc = ata_dev_read_id(dev, &class, readid_flags, id); |
623a3128 | 3787 | if (rc) |
fe30911b | 3788 | return rc; |
623a3128 TH |
3789 | |
3790 | /* is the device still there? */ | |
fe30911b TH |
3791 | if (!ata_dev_same_device(dev, class, id)) |
3792 | return -ENODEV; | |
623a3128 | 3793 | |
fe635c7e | 3794 | memcpy(dev->id, id, sizeof(id[0]) * ATA_ID_WORDS); |
fe30911b TH |
3795 | return 0; |
3796 | } | |
3797 | ||
3798 | /** | |
3799 | * ata_dev_revalidate - Revalidate ATA device | |
3800 | * @dev: device to revalidate | |
422c9daa | 3801 | * @new_class: new class code |
fe30911b TH |
3802 | * @readid_flags: read ID flags |
3803 | * | |
3804 | * Re-read IDENTIFY page, make sure @dev is still attached to the | |
3805 | * port and reconfigure it according to the new IDENTIFY page. | |
3806 | * | |
3807 | * LOCKING: | |
3808 | * Kernel thread context (may sleep) | |
3809 | * | |
3810 | * RETURNS: | |
3811 | * 0 on success, negative errno otherwise | |
3812 | */ | |
422c9daa TH |
3813 | int ata_dev_revalidate(struct ata_device *dev, unsigned int new_class, |
3814 | unsigned int readid_flags) | |
fe30911b | 3815 | { |
6ddcd3b0 | 3816 | u64 n_sectors = dev->n_sectors; |
fe30911b TH |
3817 | int rc; |
3818 | ||
3819 | if (!ata_dev_enabled(dev)) | |
3820 | return -ENODEV; | |
3821 | ||
422c9daa TH |
3822 | /* fail early if !ATA && !ATAPI to avoid issuing [P]IDENTIFY to PMP */ |
3823 | if (ata_class_enabled(new_class) && | |
3824 | new_class != ATA_DEV_ATA && new_class != ATA_DEV_ATAPI) { | |
3825 | ata_dev_printk(dev, KERN_INFO, "class mismatch %u != %u\n", | |
3826 | dev->class, new_class); | |
3827 | rc = -ENODEV; | |
3828 | goto fail; | |
3829 | } | |
3830 | ||
fe30911b TH |
3831 | /* re-read ID */ |
3832 | rc = ata_dev_reread_id(dev, readid_flags); | |
3833 | if (rc) | |
3834 | goto fail; | |
623a3128 TH |
3835 | |
3836 | /* configure device according to the new ID */ | |
efdaedc4 | 3837 | rc = ata_dev_configure(dev); |
6ddcd3b0 TH |
3838 | if (rc) |
3839 | goto fail; | |
3840 | ||
3841 | /* verify n_sectors hasn't changed */ | |
b54eebd6 TH |
3842 | if (dev->class == ATA_DEV_ATA && n_sectors && |
3843 | dev->n_sectors != n_sectors) { | |
6ddcd3b0 TH |
3844 | ata_dev_printk(dev, KERN_INFO, "n_sectors mismatch " |
3845 | "%llu != %llu\n", | |
3846 | (unsigned long long)n_sectors, | |
3847 | (unsigned long long)dev->n_sectors); | |
8270bec4 TH |
3848 | |
3849 | /* restore original n_sectors */ | |
3850 | dev->n_sectors = n_sectors; | |
3851 | ||
6ddcd3b0 TH |
3852 | rc = -ENODEV; |
3853 | goto fail; | |
3854 | } | |
3855 | ||
3856 | return 0; | |
623a3128 TH |
3857 | |
3858 | fail: | |
f15a1daf | 3859 | ata_dev_printk(dev, KERN_ERR, "revalidation failed (errno=%d)\n", rc); |
623a3128 TH |
3860 | return rc; |
3861 | } | |
3862 | ||
6919a0a6 AC |
3863 | struct ata_blacklist_entry { |
3864 | const char *model_num; | |
3865 | const char *model_rev; | |
3866 | unsigned long horkage; | |
3867 | }; | |
3868 | ||
3869 | static const struct ata_blacklist_entry ata_device_blacklist [] = { | |
3870 | /* Devices with DMA related problems under Linux */ | |
3871 | { "WDC AC11000H", NULL, ATA_HORKAGE_NODMA }, | |
3872 | { "WDC AC22100H", NULL, ATA_HORKAGE_NODMA }, | |
3873 | { "WDC AC32500H", NULL, ATA_HORKAGE_NODMA }, | |
3874 | { "WDC AC33100H", NULL, ATA_HORKAGE_NODMA }, | |
3875 | { "WDC AC31600H", NULL, ATA_HORKAGE_NODMA }, | |
3876 | { "WDC AC32100H", "24.09P07", ATA_HORKAGE_NODMA }, | |
3877 | { "WDC AC23200L", "21.10N21", ATA_HORKAGE_NODMA }, | |
3878 | { "Compaq CRD-8241B", NULL, ATA_HORKAGE_NODMA }, | |
3879 | { "CRD-8400B", NULL, ATA_HORKAGE_NODMA }, | |
3880 | { "CRD-8480B", NULL, ATA_HORKAGE_NODMA }, | |
3881 | { "CRD-8482B", NULL, ATA_HORKAGE_NODMA }, | |
3882 | { "CRD-84", NULL, ATA_HORKAGE_NODMA }, | |
3883 | { "SanDisk SDP3B", NULL, ATA_HORKAGE_NODMA }, | |
3884 | { "SanDisk SDP3B-64", NULL, ATA_HORKAGE_NODMA }, | |
3885 | { "SANYO CD-ROM CRD", NULL, ATA_HORKAGE_NODMA }, | |
3886 | { "HITACHI CDR-8", NULL, ATA_HORKAGE_NODMA }, | |
3887 | { "HITACHI CDR-8335", NULL, ATA_HORKAGE_NODMA }, | |
3888 | { "HITACHI CDR-8435", NULL, ATA_HORKAGE_NODMA }, | |
3889 | { "Toshiba CD-ROM XM-6202B", NULL, ATA_HORKAGE_NODMA }, | |
3890 | { "TOSHIBA CD-ROM XM-1702BC", NULL, ATA_HORKAGE_NODMA }, | |
3891 | { "CD-532E-A", NULL, ATA_HORKAGE_NODMA }, | |
3892 | { "E-IDE CD-ROM CR-840",NULL, ATA_HORKAGE_NODMA }, | |
3893 | { "CD-ROM Drive/F5A", NULL, ATA_HORKAGE_NODMA }, | |
3894 | { "WPI CDD-820", NULL, ATA_HORKAGE_NODMA }, | |
3895 | { "SAMSUNG CD-ROM SC-148C", NULL, ATA_HORKAGE_NODMA }, | |
3896 | { "SAMSUNG CD-ROM SC", NULL, ATA_HORKAGE_NODMA }, | |
6919a0a6 AC |
3897 | { "ATAPI CD-ROM DRIVE 40X MAXIMUM",NULL,ATA_HORKAGE_NODMA }, |
3898 | { "_NEC DV5800A", NULL, ATA_HORKAGE_NODMA }, | |
3899 | { "SAMSUNG CD-ROM SN-124","N001", ATA_HORKAGE_NODMA }, | |
39f19886 | 3900 | { "Seagate STT20000A", NULL, ATA_HORKAGE_NODMA }, |
5acd50f6 | 3901 | { "IOMEGA ZIP 250 ATAPI", NULL, ATA_HORKAGE_NODMA }, /* temporary fix */ |
39ce7128 TH |
3902 | { "IOMEGA ZIP 250 ATAPI Floppy", |
3903 | NULL, ATA_HORKAGE_NODMA }, | |
3af9a77a TH |
3904 | /* Odd clown on sil3726/4726 PMPs */ |
3905 | { "Config Disk", NULL, ATA_HORKAGE_NODMA | | |
3906 | ATA_HORKAGE_SKIP_PM }, | |
6919a0a6 | 3907 | |
18d6e9d5 | 3908 | /* Weird ATAPI devices */ |
40a1d531 | 3909 | { "TORiSAN DVD-ROM DRD-N216", NULL, ATA_HORKAGE_MAX_SEC_128 }, |
18d6e9d5 | 3910 | |
6919a0a6 AC |
3911 | /* Devices we expect to fail diagnostics */ |
3912 | ||
3913 | /* Devices where NCQ should be avoided */ | |
3914 | /* NCQ is slow */ | |
3915 | { "WDC WD740ADFD-00", NULL, ATA_HORKAGE_NONCQ }, | |
09125ea6 TH |
3916 | /* http://thread.gmane.org/gmane.linux.ide/14907 */ |
3917 | { "FUJITSU MHT2060BH", NULL, ATA_HORKAGE_NONCQ }, | |
7acfaf30 | 3918 | /* NCQ is broken */ |
539cc7c7 | 3919 | { "Maxtor *", "BANC*", ATA_HORKAGE_NONCQ }, |
0e3dbc01 | 3920 | { "Maxtor 7V300F0", "VA111630", ATA_HORKAGE_NONCQ }, |
0b0a43e0 DM |
3921 | { "HITACHI HDS7250SASUN500G*", NULL, ATA_HORKAGE_NONCQ }, |
3922 | { "HITACHI HDS7225SBSUN250G*", NULL, ATA_HORKAGE_NONCQ }, | |
539cc7c7 | 3923 | |
36e337d0 RH |
3924 | /* Blacklist entries taken from Silicon Image 3124/3132 |
3925 | Windows driver .inf file - also several Linux problem reports */ | |
3926 | { "HTS541060G9SA00", "MB3OC60D", ATA_HORKAGE_NONCQ, }, | |
3927 | { "HTS541080G9SA00", "MB4OC60D", ATA_HORKAGE_NONCQ, }, | |
3928 | { "HTS541010G9SA00", "MBZOC60D", ATA_HORKAGE_NONCQ, }, | |
bd9c5a39 TH |
3929 | /* Drives which do spurious command completion */ |
3930 | { "HTS541680J9SA00", "SB2IC7EP", ATA_HORKAGE_NONCQ, }, | |
2f8fcebb | 3931 | { "HTS541612J9SA00", "SBDIC7JP", ATA_HORKAGE_NONCQ, }, |
e14cbfa6 | 3932 | { "Hitachi HTS541616J9SA00", "SB4OC70P", ATA_HORKAGE_NONCQ, }, |
2f8fcebb | 3933 | { "WDC WD740ADFD-00NLR1", NULL, ATA_HORKAGE_NONCQ, }, |
7f567620 | 3934 | { "WDC WD3200AAJS-00RYA0", "12.01B01", ATA_HORKAGE_NONCQ, }, |
a520f261 | 3935 | { "FUJITSU MHV2080BH", "00840028", ATA_HORKAGE_NONCQ, }, |
7f567620 | 3936 | { "ST9120822AS", "3.CLF", ATA_HORKAGE_NONCQ, }, |
3fb6589c | 3937 | { "ST9160821AS", "3.CLF", ATA_HORKAGE_NONCQ, }, |
7f567620 TH |
3938 | { "ST3160812AS", "3.ADJ", ATA_HORKAGE_NONCQ, }, |
3939 | { "ST980813AS", "3.ADB", ATA_HORKAGE_NONCQ, }, | |
5d6aca8d | 3940 | { "SAMSUNG HD401LJ", "ZZ100-15", ATA_HORKAGE_NONCQ, }, |
6919a0a6 | 3941 | |
16c55b03 TH |
3942 | /* devices which puke on READ_NATIVE_MAX */ |
3943 | { "HDS724040KLSA80", "KFAOA20N", ATA_HORKAGE_BROKEN_HPA, }, | |
3944 | { "WDC WD3200JD-00KLB0", "WD-WCAMR1130137", ATA_HORKAGE_BROKEN_HPA }, | |
3945 | { "WDC WD2500JD-00HBB0", "WD-WMAL71490727", ATA_HORKAGE_BROKEN_HPA }, | |
3946 | { "MAXTOR 6L080L4", "A93.0500", ATA_HORKAGE_BROKEN_HPA }, | |
6919a0a6 | 3947 | |
93328e11 AC |
3948 | /* Devices which report 1 sector over size HPA */ |
3949 | { "ST340823A", NULL, ATA_HORKAGE_HPA_SIZE, }, | |
3950 | { "ST320413A", NULL, ATA_HORKAGE_HPA_SIZE, }, | |
3951 | ||
6919a0a6 AC |
3952 | /* End Marker */ |
3953 | { } | |
1da177e4 | 3954 | }; |
2e9edbf8 | 3955 | |
539cc7c7 JG |
3956 | int strn_pattern_cmp(const char *patt, const char *name, int wildchar) |
3957 | { | |
3958 | const char *p; | |
3959 | int len; | |
3960 | ||
3961 | /* | |
3962 | * check for trailing wildcard: *\0 | |
3963 | */ | |
3964 | p = strchr(patt, wildchar); | |
3965 | if (p && ((*(p + 1)) == 0)) | |
3966 | len = p - patt; | |
3967 | else | |
3968 | len = strlen(name); | |
3969 | ||
3970 | return strncmp(patt, name, len); | |
3971 | } | |
3972 | ||
75683fe7 | 3973 | static unsigned long ata_dev_blacklisted(const struct ata_device *dev) |
1da177e4 | 3974 | { |
8bfa79fc TH |
3975 | unsigned char model_num[ATA_ID_PROD_LEN + 1]; |
3976 | unsigned char model_rev[ATA_ID_FW_REV_LEN + 1]; | |
6919a0a6 | 3977 | const struct ata_blacklist_entry *ad = ata_device_blacklist; |
3a778275 | 3978 | |
8bfa79fc TH |
3979 | ata_id_c_string(dev->id, model_num, ATA_ID_PROD, sizeof(model_num)); |
3980 | ata_id_c_string(dev->id, model_rev, ATA_ID_FW_REV, sizeof(model_rev)); | |
1da177e4 | 3981 | |
6919a0a6 | 3982 | while (ad->model_num) { |
539cc7c7 | 3983 | if (!strn_pattern_cmp(ad->model_num, model_num, '*')) { |
6919a0a6 AC |
3984 | if (ad->model_rev == NULL) |
3985 | return ad->horkage; | |
539cc7c7 | 3986 | if (!strn_pattern_cmp(ad->model_rev, model_rev, '*')) |
6919a0a6 | 3987 | return ad->horkage; |
f4b15fef | 3988 | } |
6919a0a6 | 3989 | ad++; |
f4b15fef | 3990 | } |
1da177e4 LT |
3991 | return 0; |
3992 | } | |
3993 | ||
6919a0a6 AC |
3994 | static int ata_dma_blacklisted(const struct ata_device *dev) |
3995 | { | |
3996 | /* We don't support polling DMA. | |
3997 | * DMA blacklist those ATAPI devices with CDB-intr (and use PIO) | |
3998 | * if the LLDD handles only interrupts in the HSM_ST_LAST state. | |
3999 | */ | |
9af5c9c9 | 4000 | if ((dev->link->ap->flags & ATA_FLAG_PIO_POLLING) && |
6919a0a6 AC |
4001 | (dev->flags & ATA_DFLAG_CDB_INTR)) |
4002 | return 1; | |
75683fe7 | 4003 | return (dev->horkage & ATA_HORKAGE_NODMA) ? 1 : 0; |
6919a0a6 AC |
4004 | } |
4005 | ||
a6d5a51c TH |
4006 | /** |
4007 | * ata_dev_xfermask - Compute supported xfermask of the given device | |
a6d5a51c TH |
4008 | * @dev: Device to compute xfermask for |
4009 | * | |
acf356b1 TH |
4010 | * Compute supported xfermask of @dev and store it in |
4011 | * dev->*_mask. This function is responsible for applying all | |
4012 | * known limits including host controller limits, device | |
4013 | * blacklist, etc... | |
a6d5a51c TH |
4014 | * |
4015 | * LOCKING: | |
4016 | * None. | |
a6d5a51c | 4017 | */ |
3373efd8 | 4018 | static void ata_dev_xfermask(struct ata_device *dev) |
1da177e4 | 4019 | { |
9af5c9c9 TH |
4020 | struct ata_link *link = dev->link; |
4021 | struct ata_port *ap = link->ap; | |
cca3974e | 4022 | struct ata_host *host = ap->host; |
a6d5a51c | 4023 | unsigned long xfer_mask; |
1da177e4 | 4024 | |
37deecb5 | 4025 | /* controller modes available */ |
565083e1 TH |
4026 | xfer_mask = ata_pack_xfermask(ap->pio_mask, |
4027 | ap->mwdma_mask, ap->udma_mask); | |
4028 | ||
8343f889 | 4029 | /* drive modes available */ |
37deecb5 TH |
4030 | xfer_mask &= ata_pack_xfermask(dev->pio_mask, |
4031 | dev->mwdma_mask, dev->udma_mask); | |
4032 | xfer_mask &= ata_id_xfermask(dev->id); | |
565083e1 | 4033 | |
b352e57d AC |
4034 | /* |
4035 | * CFA Advanced TrueIDE timings are not allowed on a shared | |
4036 | * cable | |
4037 | */ | |
4038 | if (ata_dev_pair(dev)) { | |
4039 | /* No PIO5 or PIO6 */ | |
4040 | xfer_mask &= ~(0x03 << (ATA_SHIFT_PIO + 5)); | |
4041 | /* No MWDMA3 or MWDMA 4 */ | |
4042 | xfer_mask &= ~(0x03 << (ATA_SHIFT_MWDMA + 3)); | |
4043 | } | |
4044 | ||
37deecb5 TH |
4045 | if (ata_dma_blacklisted(dev)) { |
4046 | xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA); | |
f15a1daf TH |
4047 | ata_dev_printk(dev, KERN_WARNING, |
4048 | "device is on DMA blacklist, disabling DMA\n"); | |
37deecb5 | 4049 | } |
a6d5a51c | 4050 | |
14d66ab7 PV |
4051 | if ((host->flags & ATA_HOST_SIMPLEX) && |
4052 | host->simplex_claimed && host->simplex_claimed != ap) { | |
37deecb5 TH |
4053 | xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA); |
4054 | ata_dev_printk(dev, KERN_WARNING, "simplex DMA is claimed by " | |
4055 | "other device, disabling DMA\n"); | |
5444a6f4 | 4056 | } |
565083e1 | 4057 | |
e424675f JG |
4058 | if (ap->flags & ATA_FLAG_NO_IORDY) |
4059 | xfer_mask &= ata_pio_mask_no_iordy(dev); | |
4060 | ||
5444a6f4 | 4061 | if (ap->ops->mode_filter) |
a76b62ca | 4062 | xfer_mask = ap->ops->mode_filter(dev, xfer_mask); |
5444a6f4 | 4063 | |
8343f889 RH |
4064 | /* Apply cable rule here. Don't apply it early because when |
4065 | * we handle hot plug the cable type can itself change. | |
4066 | * Check this last so that we know if the transfer rate was | |
4067 | * solely limited by the cable. | |
4068 | * Unknown or 80 wire cables reported host side are checked | |
4069 | * drive side as well. Cases where we know a 40wire cable | |
4070 | * is used safely for 80 are not checked here. | |
4071 | */ | |
4072 | if (xfer_mask & (0xF8 << ATA_SHIFT_UDMA)) | |
4073 | /* UDMA/44 or higher would be available */ | |
4074 | if((ap->cbl == ATA_CBL_PATA40) || | |
4075 | (ata_drive_40wire(dev->id) && | |
4076 | (ap->cbl == ATA_CBL_PATA_UNK || | |
4077 | ap->cbl == ATA_CBL_PATA80))) { | |
4078 | ata_dev_printk(dev, KERN_WARNING, | |
4079 | "limited to UDMA/33 due to 40-wire cable\n"); | |
4080 | xfer_mask &= ~(0xF8 << ATA_SHIFT_UDMA); | |
4081 | } | |
4082 | ||
565083e1 TH |
4083 | ata_unpack_xfermask(xfer_mask, &dev->pio_mask, |
4084 | &dev->mwdma_mask, &dev->udma_mask); | |
1da177e4 LT |
4085 | } |
4086 | ||
1da177e4 LT |
4087 | /** |
4088 | * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command | |
1da177e4 LT |
4089 | * @dev: Device to which command will be sent |
4090 | * | |
780a87f7 JG |
4091 | * Issue SET FEATURES - XFER MODE command to device @dev |
4092 | * on port @ap. | |
4093 | * | |
1da177e4 | 4094 | * LOCKING: |
0cba632b | 4095 | * PCI/etc. bus probe sem. |
83206a29 TH |
4096 | * |
4097 | * RETURNS: | |
4098 | * 0 on success, AC_ERR_* mask otherwise. | |
1da177e4 LT |
4099 | */ |
4100 | ||
3373efd8 | 4101 | static unsigned int ata_dev_set_xfermode(struct ata_device *dev) |
1da177e4 | 4102 | { |
a0123703 | 4103 | struct ata_taskfile tf; |
83206a29 | 4104 | unsigned int err_mask; |
1da177e4 LT |
4105 | |
4106 | /* set up set-features taskfile */ | |
4107 | DPRINTK("set features - xfer mode\n"); | |
4108 | ||
464cf177 TH |
4109 | /* Some controllers and ATAPI devices show flaky interrupt |
4110 | * behavior after setting xfer mode. Use polling instead. | |
4111 | */ | |
3373efd8 | 4112 | ata_tf_init(dev, &tf); |
a0123703 TH |
4113 | tf.command = ATA_CMD_SET_FEATURES; |
4114 | tf.feature = SETFEATURES_XFER; | |
464cf177 | 4115 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_POLLING; |
a0123703 TH |
4116 | tf.protocol = ATA_PROT_NODATA; |
4117 | tf.nsect = dev->xfer_mode; | |
1da177e4 | 4118 | |
3373efd8 | 4119 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0); |
9f45cbd3 KCA |
4120 | |
4121 | DPRINTK("EXIT, err_mask=%x\n", err_mask); | |
4122 | return err_mask; | |
4123 | } | |
4124 | ||
4125 | /** | |
4126 | * ata_dev_set_AN - Issue SET FEATURES - SATA FEATURES | |
4127 | * @dev: Device to which command will be sent | |
4128 | * @enable: Whether to enable or disable the feature | |
4129 | * | |
4130 | * Issue SET FEATURES - SATA FEATURES command to device @dev | |
4131 | * on port @ap with sector count set to indicate Asynchronous | |
4132 | * Notification feature | |
4133 | * | |
4134 | * LOCKING: | |
4135 | * PCI/etc. bus probe sem. | |
4136 | * | |
4137 | * RETURNS: | |
4138 | * 0 on success, AC_ERR_* mask otherwise. | |
4139 | */ | |
4140 | static unsigned int ata_dev_set_AN(struct ata_device *dev, u8 enable) | |
4141 | { | |
4142 | struct ata_taskfile tf; | |
4143 | unsigned int err_mask; | |
4144 | ||
4145 | /* set up set-features taskfile */ | |
4146 | DPRINTK("set features - SATA features\n"); | |
4147 | ||
4148 | ata_tf_init(dev, &tf); | |
4149 | tf.command = ATA_CMD_SET_FEATURES; | |
4150 | tf.feature = enable; | |
4151 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
4152 | tf.protocol = ATA_PROT_NODATA; | |
4153 | tf.nsect = SATA_AN; | |
4154 | ||
4155 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0); | |
1da177e4 | 4156 | |
83206a29 TH |
4157 | DPRINTK("EXIT, err_mask=%x\n", err_mask); |
4158 | return err_mask; | |
1da177e4 LT |
4159 | } |
4160 | ||
8bf62ece AL |
4161 | /** |
4162 | * ata_dev_init_params - Issue INIT DEV PARAMS command | |
8bf62ece | 4163 | * @dev: Device to which command will be sent |
e2a7f77a RD |
4164 | * @heads: Number of heads (taskfile parameter) |
4165 | * @sectors: Number of sectors (taskfile parameter) | |
8bf62ece AL |
4166 | * |
4167 | * LOCKING: | |
6aff8f1f TH |
4168 | * Kernel thread context (may sleep) |
4169 | * | |
4170 | * RETURNS: | |
4171 | * 0 on success, AC_ERR_* mask otherwise. | |
8bf62ece | 4172 | */ |
3373efd8 TH |
4173 | static unsigned int ata_dev_init_params(struct ata_device *dev, |
4174 | u16 heads, u16 sectors) | |
8bf62ece | 4175 | { |
a0123703 | 4176 | struct ata_taskfile tf; |
6aff8f1f | 4177 | unsigned int err_mask; |
8bf62ece AL |
4178 | |
4179 | /* Number of sectors per track 1-255. Number of heads 1-16 */ | |
4180 | if (sectors < 1 || sectors > 255 || heads < 1 || heads > 16) | |
00b6f5e9 | 4181 | return AC_ERR_INVALID; |
8bf62ece AL |
4182 | |
4183 | /* set up init dev params taskfile */ | |
4184 | DPRINTK("init dev params \n"); | |
4185 | ||
3373efd8 | 4186 | ata_tf_init(dev, &tf); |
a0123703 TH |
4187 | tf.command = ATA_CMD_INIT_DEV_PARAMS; |
4188 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
4189 | tf.protocol = ATA_PROT_NODATA; | |
4190 | tf.nsect = sectors; | |
4191 | tf.device |= (heads - 1) & 0x0f; /* max head = num. of heads - 1 */ | |
8bf62ece | 4192 | |
3373efd8 | 4193 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0); |
18b2466c AC |
4194 | /* A clean abort indicates an original or just out of spec drive |
4195 | and we should continue as we issue the setup based on the | |
4196 | drive reported working geometry */ | |
4197 | if (err_mask == AC_ERR_DEV && (tf.feature & ATA_ABORTED)) | |
4198 | err_mask = 0; | |
8bf62ece | 4199 | |
6aff8f1f TH |
4200 | DPRINTK("EXIT, err_mask=%x\n", err_mask); |
4201 | return err_mask; | |
8bf62ece AL |
4202 | } |
4203 | ||
1da177e4 | 4204 | /** |
0cba632b JG |
4205 | * ata_sg_clean - Unmap DMA memory associated with command |
4206 | * @qc: Command containing DMA memory to be released | |
4207 | * | |
4208 | * Unmap all mapped DMA memory associated with this command. | |
1da177e4 LT |
4209 | * |
4210 | * LOCKING: | |
cca3974e | 4211 | * spin_lock_irqsave(host lock) |
1da177e4 | 4212 | */ |
70e6ad0c | 4213 | void ata_sg_clean(struct ata_queued_cmd *qc) |
1da177e4 LT |
4214 | { |
4215 | struct ata_port *ap = qc->ap; | |
cedc9a47 | 4216 | struct scatterlist *sg = qc->__sg; |
1da177e4 | 4217 | int dir = qc->dma_dir; |
cedc9a47 | 4218 | void *pad_buf = NULL; |
1da177e4 | 4219 | |
a4631474 TH |
4220 | WARN_ON(!(qc->flags & ATA_QCFLAG_DMAMAP)); |
4221 | WARN_ON(sg == NULL); | |
1da177e4 LT |
4222 | |
4223 | if (qc->flags & ATA_QCFLAG_SINGLE) | |
f131883e | 4224 | WARN_ON(qc->n_elem > 1); |
1da177e4 | 4225 | |
2c13b7ce | 4226 | VPRINTK("unmapping %u sg elements\n", qc->n_elem); |
1da177e4 | 4227 | |
cedc9a47 JG |
4228 | /* if we padded the buffer out to 32-bit bound, and data |
4229 | * xfer direction is from-device, we must copy from the | |
4230 | * pad buffer back into the supplied buffer | |
4231 | */ | |
4232 | if (qc->pad_len && !(qc->tf.flags & ATA_TFLAG_WRITE)) | |
4233 | pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ); | |
4234 | ||
4235 | if (qc->flags & ATA_QCFLAG_SG) { | |
e1410f2d | 4236 | if (qc->n_elem) |
2f1f610b | 4237 | dma_unmap_sg(ap->dev, sg, qc->n_elem, dir); |
cedc9a47 JG |
4238 | /* restore last sg */ |
4239 | sg[qc->orig_n_elem - 1].length += qc->pad_len; | |
4240 | if (pad_buf) { | |
4241 | struct scatterlist *psg = &qc->pad_sgent; | |
4242 | void *addr = kmap_atomic(psg->page, KM_IRQ0); | |
4243 | memcpy(addr + psg->offset, pad_buf, qc->pad_len); | |
dfa15988 | 4244 | kunmap_atomic(addr, KM_IRQ0); |
cedc9a47 JG |
4245 | } |
4246 | } else { | |
2e242fa9 | 4247 | if (qc->n_elem) |
2f1f610b | 4248 | dma_unmap_single(ap->dev, |
e1410f2d JG |
4249 | sg_dma_address(&sg[0]), sg_dma_len(&sg[0]), |
4250 | dir); | |
cedc9a47 JG |
4251 | /* restore sg */ |
4252 | sg->length += qc->pad_len; | |
4253 | if (pad_buf) | |
4254 | memcpy(qc->buf_virt + sg->length - qc->pad_len, | |
4255 | pad_buf, qc->pad_len); | |
4256 | } | |
1da177e4 LT |
4257 | |
4258 | qc->flags &= ~ATA_QCFLAG_DMAMAP; | |
cedc9a47 | 4259 | qc->__sg = NULL; |
1da177e4 LT |
4260 | } |
4261 | ||
4262 | /** | |
4263 | * ata_fill_sg - Fill PCI IDE PRD table | |
4264 | * @qc: Metadata associated with taskfile to be transferred | |
4265 | * | |
780a87f7 JG |
4266 | * Fill PCI IDE PRD (scatter-gather) table with segments |
4267 | * associated with the current disk command. | |
4268 | * | |
1da177e4 | 4269 | * LOCKING: |
cca3974e | 4270 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
4271 | * |
4272 | */ | |
4273 | static void ata_fill_sg(struct ata_queued_cmd *qc) | |
4274 | { | |
1da177e4 | 4275 | struct ata_port *ap = qc->ap; |
cedc9a47 JG |
4276 | struct scatterlist *sg; |
4277 | unsigned int idx; | |
1da177e4 | 4278 | |
a4631474 | 4279 | WARN_ON(qc->__sg == NULL); |
f131883e | 4280 | WARN_ON(qc->n_elem == 0 && qc->pad_len == 0); |
1da177e4 LT |
4281 | |
4282 | idx = 0; | |
cedc9a47 | 4283 | ata_for_each_sg(sg, qc) { |
1da177e4 LT |
4284 | u32 addr, offset; |
4285 | u32 sg_len, len; | |
4286 | ||
4287 | /* determine if physical DMA addr spans 64K boundary. | |
4288 | * Note h/w doesn't support 64-bit, so we unconditionally | |
4289 | * truncate dma_addr_t to u32. | |
4290 | */ | |
4291 | addr = (u32) sg_dma_address(sg); | |
4292 | sg_len = sg_dma_len(sg); | |
4293 | ||
4294 | while (sg_len) { | |
4295 | offset = addr & 0xffff; | |
4296 | len = sg_len; | |
4297 | if ((offset + sg_len) > 0x10000) | |
4298 | len = 0x10000 - offset; | |
4299 | ||
4300 | ap->prd[idx].addr = cpu_to_le32(addr); | |
4301 | ap->prd[idx].flags_len = cpu_to_le32(len & 0xffff); | |
4302 | VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", idx, addr, len); | |
4303 | ||
4304 | idx++; | |
4305 | sg_len -= len; | |
4306 | addr += len; | |
4307 | } | |
4308 | } | |
4309 | ||
4310 | if (idx) | |
4311 | ap->prd[idx - 1].flags_len |= cpu_to_le32(ATA_PRD_EOT); | |
4312 | } | |
b9a4197e | 4313 | |
d26fc955 AC |
4314 | /** |
4315 | * ata_fill_sg_dumb - Fill PCI IDE PRD table | |
4316 | * @qc: Metadata associated with taskfile to be transferred | |
4317 | * | |
4318 | * Fill PCI IDE PRD (scatter-gather) table with segments | |
4319 | * associated with the current disk command. Perform the fill | |
4320 | * so that we avoid writing any length 64K records for | |
4321 | * controllers that don't follow the spec. | |
4322 | * | |
4323 | * LOCKING: | |
4324 | * spin_lock_irqsave(host lock) | |
4325 | * | |
4326 | */ | |
4327 | static void ata_fill_sg_dumb(struct ata_queued_cmd *qc) | |
4328 | { | |
4329 | struct ata_port *ap = qc->ap; | |
4330 | struct scatterlist *sg; | |
4331 | unsigned int idx; | |
4332 | ||
4333 | WARN_ON(qc->__sg == NULL); | |
4334 | WARN_ON(qc->n_elem == 0 && qc->pad_len == 0); | |
4335 | ||
4336 | idx = 0; | |
4337 | ata_for_each_sg(sg, qc) { | |
4338 | u32 addr, offset; | |
4339 | u32 sg_len, len, blen; | |
4340 | ||
4341 | /* determine if physical DMA addr spans 64K boundary. | |
4342 | * Note h/w doesn't support 64-bit, so we unconditionally | |
4343 | * truncate dma_addr_t to u32. | |
4344 | */ | |
4345 | addr = (u32) sg_dma_address(sg); | |
4346 | sg_len = sg_dma_len(sg); | |
4347 | ||
4348 | while (sg_len) { | |
4349 | offset = addr & 0xffff; | |
4350 | len = sg_len; | |
4351 | if ((offset + sg_len) > 0x10000) | |
4352 | len = 0x10000 - offset; | |
4353 | ||
4354 | blen = len & 0xffff; | |
4355 | ap->prd[idx].addr = cpu_to_le32(addr); | |
4356 | if (blen == 0) { | |
4357 | /* Some PATA chipsets like the CS5530 can't | |
4358 | cope with 0x0000 meaning 64K as the spec says */ | |
4359 | ap->prd[idx].flags_len = cpu_to_le32(0x8000); | |
4360 | blen = 0x8000; | |
4361 | ap->prd[++idx].addr = cpu_to_le32(addr + 0x8000); | |
4362 | } | |
4363 | ap->prd[idx].flags_len = cpu_to_le32(blen); | |
4364 | VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", idx, addr, len); | |
4365 | ||
4366 | idx++; | |
4367 | sg_len -= len; | |
4368 | addr += len; | |
4369 | } | |
4370 | } | |
4371 | ||
4372 | if (idx) | |
4373 | ap->prd[idx - 1].flags_len |= cpu_to_le32(ATA_PRD_EOT); | |
4374 | } | |
4375 | ||
1da177e4 LT |
4376 | /** |
4377 | * ata_check_atapi_dma - Check whether ATAPI DMA can be supported | |
4378 | * @qc: Metadata associated with taskfile to check | |
4379 | * | |
780a87f7 JG |
4380 | * Allow low-level driver to filter ATA PACKET commands, returning |
4381 | * a status indicating whether or not it is OK to use DMA for the | |
4382 | * supplied PACKET command. | |
4383 | * | |
1da177e4 | 4384 | * LOCKING: |
cca3974e | 4385 | * spin_lock_irqsave(host lock) |
0cba632b | 4386 | * |
1da177e4 LT |
4387 | * RETURNS: 0 when ATAPI DMA can be used |
4388 | * nonzero otherwise | |
4389 | */ | |
4390 | int ata_check_atapi_dma(struct ata_queued_cmd *qc) | |
4391 | { | |
4392 | struct ata_port *ap = qc->ap; | |
b9a4197e TH |
4393 | |
4394 | /* Don't allow DMA if it isn't multiple of 16 bytes. Quite a | |
4395 | * few ATAPI devices choke on such DMA requests. | |
4396 | */ | |
4397 | if (unlikely(qc->nbytes & 15)) | |
4398 | return 1; | |
6f23a31d | 4399 | |
1da177e4 | 4400 | if (ap->ops->check_atapi_dma) |
b9a4197e | 4401 | return ap->ops->check_atapi_dma(qc); |
1da177e4 | 4402 | |
b9a4197e | 4403 | return 0; |
1da177e4 | 4404 | } |
b9a4197e | 4405 | |
31cc23b3 TH |
4406 | /** |
4407 | * ata_std_qc_defer - Check whether a qc needs to be deferred | |
4408 | * @qc: ATA command in question | |
4409 | * | |
4410 | * Non-NCQ commands cannot run with any other command, NCQ or | |
4411 | * not. As upper layer only knows the queue depth, we are | |
4412 | * responsible for maintaining exclusion. This function checks | |
4413 | * whether a new command @qc can be issued. | |
4414 | * | |
4415 | * LOCKING: | |
4416 | * spin_lock_irqsave(host lock) | |
4417 | * | |
4418 | * RETURNS: | |
4419 | * ATA_DEFER_* if deferring is needed, 0 otherwise. | |
4420 | */ | |
4421 | int ata_std_qc_defer(struct ata_queued_cmd *qc) | |
4422 | { | |
4423 | struct ata_link *link = qc->dev->link; | |
4424 | ||
4425 | if (qc->tf.protocol == ATA_PROT_NCQ) { | |
4426 | if (!ata_tag_valid(link->active_tag)) | |
4427 | return 0; | |
4428 | } else { | |
4429 | if (!ata_tag_valid(link->active_tag) && !link->sactive) | |
4430 | return 0; | |
4431 | } | |
4432 | ||
4433 | return ATA_DEFER_LINK; | |
4434 | } | |
4435 | ||
1da177e4 LT |
4436 | /** |
4437 | * ata_qc_prep - Prepare taskfile for submission | |
4438 | * @qc: Metadata associated with taskfile to be prepared | |
4439 | * | |
780a87f7 JG |
4440 | * Prepare ATA taskfile for submission. |
4441 | * | |
1da177e4 | 4442 | * LOCKING: |
cca3974e | 4443 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
4444 | */ |
4445 | void ata_qc_prep(struct ata_queued_cmd *qc) | |
4446 | { | |
4447 | if (!(qc->flags & ATA_QCFLAG_DMAMAP)) | |
4448 | return; | |
4449 | ||
4450 | ata_fill_sg(qc); | |
4451 | } | |
4452 | ||
d26fc955 AC |
4453 | /** |
4454 | * ata_dumb_qc_prep - Prepare taskfile for submission | |
4455 | * @qc: Metadata associated with taskfile to be prepared | |
4456 | * | |
4457 | * Prepare ATA taskfile for submission. | |
4458 | * | |
4459 | * LOCKING: | |
4460 | * spin_lock_irqsave(host lock) | |
4461 | */ | |
4462 | void ata_dumb_qc_prep(struct ata_queued_cmd *qc) | |
4463 | { | |
4464 | if (!(qc->flags & ATA_QCFLAG_DMAMAP)) | |
4465 | return; | |
4466 | ||
4467 | ata_fill_sg_dumb(qc); | |
4468 | } | |
4469 | ||
e46834cd BK |
4470 | void ata_noop_qc_prep(struct ata_queued_cmd *qc) { } |
4471 | ||
0cba632b JG |
4472 | /** |
4473 | * ata_sg_init_one - Associate command with memory buffer | |
4474 | * @qc: Command to be associated | |
4475 | * @buf: Memory buffer | |
4476 | * @buflen: Length of memory buffer, in bytes. | |
4477 | * | |
4478 | * Initialize the data-related elements of queued_cmd @qc | |
4479 | * to point to a single memory buffer, @buf of byte length @buflen. | |
4480 | * | |
4481 | * LOCKING: | |
cca3974e | 4482 | * spin_lock_irqsave(host lock) |
0cba632b JG |
4483 | */ |
4484 | ||
1da177e4 LT |
4485 | void ata_sg_init_one(struct ata_queued_cmd *qc, void *buf, unsigned int buflen) |
4486 | { | |
1da177e4 LT |
4487 | qc->flags |= ATA_QCFLAG_SINGLE; |
4488 | ||
cedc9a47 | 4489 | qc->__sg = &qc->sgent; |
1da177e4 | 4490 | qc->n_elem = 1; |
cedc9a47 | 4491 | qc->orig_n_elem = 1; |
1da177e4 | 4492 | qc->buf_virt = buf; |
233277ca | 4493 | qc->nbytes = buflen; |
1da177e4 | 4494 | |
61c0596c | 4495 | sg_init_one(&qc->sgent, buf, buflen); |
1da177e4 LT |
4496 | } |
4497 | ||
0cba632b JG |
4498 | /** |
4499 | * ata_sg_init - Associate command with scatter-gather table. | |
4500 | * @qc: Command to be associated | |
4501 | * @sg: Scatter-gather table. | |
4502 | * @n_elem: Number of elements in s/g table. | |
4503 | * | |
4504 | * Initialize the data-related elements of queued_cmd @qc | |
4505 | * to point to a scatter-gather table @sg, containing @n_elem | |
4506 | * elements. | |
4507 | * | |
4508 | * LOCKING: | |
cca3974e | 4509 | * spin_lock_irqsave(host lock) |
0cba632b JG |
4510 | */ |
4511 | ||
1da177e4 LT |
4512 | void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg, |
4513 | unsigned int n_elem) | |
4514 | { | |
4515 | qc->flags |= ATA_QCFLAG_SG; | |
cedc9a47 | 4516 | qc->__sg = sg; |
1da177e4 | 4517 | qc->n_elem = n_elem; |
cedc9a47 | 4518 | qc->orig_n_elem = n_elem; |
1da177e4 LT |
4519 | } |
4520 | ||
4521 | /** | |
0cba632b JG |
4522 | * ata_sg_setup_one - DMA-map the memory buffer associated with a command. |
4523 | * @qc: Command with memory buffer to be mapped. | |
4524 | * | |
4525 | * DMA-map the memory buffer associated with queued_cmd @qc. | |
1da177e4 LT |
4526 | * |
4527 | * LOCKING: | |
cca3974e | 4528 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
4529 | * |
4530 | * RETURNS: | |
0cba632b | 4531 | * Zero on success, negative on error. |
1da177e4 LT |
4532 | */ |
4533 | ||
4534 | static int ata_sg_setup_one(struct ata_queued_cmd *qc) | |
4535 | { | |
4536 | struct ata_port *ap = qc->ap; | |
4537 | int dir = qc->dma_dir; | |
cedc9a47 | 4538 | struct scatterlist *sg = qc->__sg; |
1da177e4 | 4539 | dma_addr_t dma_address; |
2e242fa9 | 4540 | int trim_sg = 0; |
1da177e4 | 4541 | |
cedc9a47 JG |
4542 | /* we must lengthen transfers to end on a 32-bit boundary */ |
4543 | qc->pad_len = sg->length & 3; | |
4544 | if (qc->pad_len) { | |
4545 | void *pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ); | |
4546 | struct scatterlist *psg = &qc->pad_sgent; | |
4547 | ||
a4631474 | 4548 | WARN_ON(qc->dev->class != ATA_DEV_ATAPI); |
cedc9a47 JG |
4549 | |
4550 | memset(pad_buf, 0, ATA_DMA_PAD_SZ); | |
4551 | ||
4552 | if (qc->tf.flags & ATA_TFLAG_WRITE) | |
4553 | memcpy(pad_buf, qc->buf_virt + sg->length - qc->pad_len, | |
4554 | qc->pad_len); | |
4555 | ||
4556 | sg_dma_address(psg) = ap->pad_dma + (qc->tag * ATA_DMA_PAD_SZ); | |
4557 | sg_dma_len(psg) = ATA_DMA_PAD_SZ; | |
4558 | /* trim sg */ | |
4559 | sg->length -= qc->pad_len; | |
2e242fa9 TH |
4560 | if (sg->length == 0) |
4561 | trim_sg = 1; | |
cedc9a47 JG |
4562 | |
4563 | DPRINTK("padding done, sg->length=%u pad_len=%u\n", | |
4564 | sg->length, qc->pad_len); | |
4565 | } | |
4566 | ||
2e242fa9 TH |
4567 | if (trim_sg) { |
4568 | qc->n_elem--; | |
e1410f2d JG |
4569 | goto skip_map; |
4570 | } | |
4571 | ||
2f1f610b | 4572 | dma_address = dma_map_single(ap->dev, qc->buf_virt, |
32529e01 | 4573 | sg->length, dir); |
537a95d9 TH |
4574 | if (dma_mapping_error(dma_address)) { |
4575 | /* restore sg */ | |
4576 | sg->length += qc->pad_len; | |
1da177e4 | 4577 | return -1; |
537a95d9 | 4578 | } |
1da177e4 LT |
4579 | |
4580 | sg_dma_address(sg) = dma_address; | |
32529e01 | 4581 | sg_dma_len(sg) = sg->length; |
1da177e4 | 4582 | |
2e242fa9 | 4583 | skip_map: |
1da177e4 LT |
4584 | DPRINTK("mapped buffer of %d bytes for %s\n", sg_dma_len(sg), |
4585 | qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read"); | |
4586 | ||
4587 | return 0; | |
4588 | } | |
4589 | ||
4590 | /** | |
0cba632b JG |
4591 | * ata_sg_setup - DMA-map the scatter-gather table associated with a command. |
4592 | * @qc: Command with scatter-gather table to be mapped. | |
4593 | * | |
4594 | * DMA-map the scatter-gather table associated with queued_cmd @qc. | |
1da177e4 LT |
4595 | * |
4596 | * LOCKING: | |
cca3974e | 4597 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
4598 | * |
4599 | * RETURNS: | |
0cba632b | 4600 | * Zero on success, negative on error. |
1da177e4 LT |
4601 | * |
4602 | */ | |
4603 | ||
4604 | static int ata_sg_setup(struct ata_queued_cmd *qc) | |
4605 | { | |
4606 | struct ata_port *ap = qc->ap; | |
cedc9a47 JG |
4607 | struct scatterlist *sg = qc->__sg; |
4608 | struct scatterlist *lsg = &sg[qc->n_elem - 1]; | |
e1410f2d | 4609 | int n_elem, pre_n_elem, dir, trim_sg = 0; |
1da177e4 | 4610 | |
44877b4e | 4611 | VPRINTK("ENTER, ata%u\n", ap->print_id); |
a4631474 | 4612 | WARN_ON(!(qc->flags & ATA_QCFLAG_SG)); |
1da177e4 | 4613 | |
cedc9a47 JG |
4614 | /* we must lengthen transfers to end on a 32-bit boundary */ |
4615 | qc->pad_len = lsg->length & 3; | |
4616 | if (qc->pad_len) { | |
4617 | void *pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ); | |
4618 | struct scatterlist *psg = &qc->pad_sgent; | |
4619 | unsigned int offset; | |
4620 | ||
a4631474 | 4621 | WARN_ON(qc->dev->class != ATA_DEV_ATAPI); |
cedc9a47 JG |
4622 | |
4623 | memset(pad_buf, 0, ATA_DMA_PAD_SZ); | |
4624 | ||
4625 | /* | |
4626 | * psg->page/offset are used to copy to-be-written | |
4627 | * data in this function or read data in ata_sg_clean. | |
4628 | */ | |
4629 | offset = lsg->offset + lsg->length - qc->pad_len; | |
4630 | psg->page = nth_page(lsg->page, offset >> PAGE_SHIFT); | |
4631 | psg->offset = offset_in_page(offset); | |
4632 | ||
4633 | if (qc->tf.flags & ATA_TFLAG_WRITE) { | |
4634 | void *addr = kmap_atomic(psg->page, KM_IRQ0); | |
4635 | memcpy(pad_buf, addr + psg->offset, qc->pad_len); | |
dfa15988 | 4636 | kunmap_atomic(addr, KM_IRQ0); |
cedc9a47 JG |
4637 | } |
4638 | ||
4639 | sg_dma_address(psg) = ap->pad_dma + (qc->tag * ATA_DMA_PAD_SZ); | |
4640 | sg_dma_len(psg) = ATA_DMA_PAD_SZ; | |
4641 | /* trim last sg */ | |
4642 | lsg->length -= qc->pad_len; | |
e1410f2d JG |
4643 | if (lsg->length == 0) |
4644 | trim_sg = 1; | |
cedc9a47 JG |
4645 | |
4646 | DPRINTK("padding done, sg[%d].length=%u pad_len=%u\n", | |
4647 | qc->n_elem - 1, lsg->length, qc->pad_len); | |
4648 | } | |
4649 | ||
e1410f2d JG |
4650 | pre_n_elem = qc->n_elem; |
4651 | if (trim_sg && pre_n_elem) | |
4652 | pre_n_elem--; | |
4653 | ||
4654 | if (!pre_n_elem) { | |
4655 | n_elem = 0; | |
4656 | goto skip_map; | |
4657 | } | |
4658 | ||
1da177e4 | 4659 | dir = qc->dma_dir; |
2f1f610b | 4660 | n_elem = dma_map_sg(ap->dev, sg, pre_n_elem, dir); |
537a95d9 TH |
4661 | if (n_elem < 1) { |
4662 | /* restore last sg */ | |
4663 | lsg->length += qc->pad_len; | |
1da177e4 | 4664 | return -1; |
537a95d9 | 4665 | } |
1da177e4 LT |
4666 | |
4667 | DPRINTK("%d sg elements mapped\n", n_elem); | |
4668 | ||
e1410f2d | 4669 | skip_map: |
1da177e4 LT |
4670 | qc->n_elem = n_elem; |
4671 | ||
4672 | return 0; | |
4673 | } | |
4674 | ||
0baab86b | 4675 | /** |
c893a3ae | 4676 | * swap_buf_le16 - swap halves of 16-bit words in place |
0baab86b EF |
4677 | * @buf: Buffer to swap |
4678 | * @buf_words: Number of 16-bit words in buffer. | |
4679 | * | |
4680 | * Swap halves of 16-bit words if needed to convert from | |
4681 | * little-endian byte order to native cpu byte order, or | |
4682 | * vice-versa. | |
4683 | * | |
4684 | * LOCKING: | |
6f0ef4fa | 4685 | * Inherited from caller. |
0baab86b | 4686 | */ |
1da177e4 LT |
4687 | void swap_buf_le16(u16 *buf, unsigned int buf_words) |
4688 | { | |
4689 | #ifdef __BIG_ENDIAN | |
4690 | unsigned int i; | |
4691 | ||
4692 | for (i = 0; i < buf_words; i++) | |
4693 | buf[i] = le16_to_cpu(buf[i]); | |
4694 | #endif /* __BIG_ENDIAN */ | |
4695 | } | |
4696 | ||
6ae4cfb5 | 4697 | /** |
0d5ff566 | 4698 | * ata_data_xfer - Transfer data by PIO |
a6b2c5d4 | 4699 | * @adev: device to target |
6ae4cfb5 AL |
4700 | * @buf: data buffer |
4701 | * @buflen: buffer length | |
344babaa | 4702 | * @write_data: read/write |
6ae4cfb5 AL |
4703 | * |
4704 | * Transfer data from/to the device data register by PIO. | |
4705 | * | |
4706 | * LOCKING: | |
4707 | * Inherited from caller. | |
6ae4cfb5 | 4708 | */ |
0d5ff566 TH |
4709 | void ata_data_xfer(struct ata_device *adev, unsigned char *buf, |
4710 | unsigned int buflen, int write_data) | |
1da177e4 | 4711 | { |
9af5c9c9 | 4712 | struct ata_port *ap = adev->link->ap; |
6ae4cfb5 | 4713 | unsigned int words = buflen >> 1; |
1da177e4 | 4714 | |
6ae4cfb5 | 4715 | /* Transfer multiple of 2 bytes */ |
1da177e4 | 4716 | if (write_data) |
0d5ff566 | 4717 | iowrite16_rep(ap->ioaddr.data_addr, buf, words); |
1da177e4 | 4718 | else |
0d5ff566 | 4719 | ioread16_rep(ap->ioaddr.data_addr, buf, words); |
6ae4cfb5 AL |
4720 | |
4721 | /* Transfer trailing 1 byte, if any. */ | |
4722 | if (unlikely(buflen & 0x01)) { | |
4723 | u16 align_buf[1] = { 0 }; | |
4724 | unsigned char *trailing_buf = buf + buflen - 1; | |
4725 | ||
4726 | if (write_data) { | |
4727 | memcpy(align_buf, trailing_buf, 1); | |
0d5ff566 | 4728 | iowrite16(le16_to_cpu(align_buf[0]), ap->ioaddr.data_addr); |
6ae4cfb5 | 4729 | } else { |
0d5ff566 | 4730 | align_buf[0] = cpu_to_le16(ioread16(ap->ioaddr.data_addr)); |
6ae4cfb5 AL |
4731 | memcpy(trailing_buf, align_buf, 1); |
4732 | } | |
4733 | } | |
1da177e4 LT |
4734 | } |
4735 | ||
75e99585 | 4736 | /** |
0d5ff566 | 4737 | * ata_data_xfer_noirq - Transfer data by PIO |
75e99585 AC |
4738 | * @adev: device to target |
4739 | * @buf: data buffer | |
4740 | * @buflen: buffer length | |
4741 | * @write_data: read/write | |
4742 | * | |
88574551 | 4743 | * Transfer data from/to the device data register by PIO. Do the |
75e99585 AC |
4744 | * transfer with interrupts disabled. |
4745 | * | |
4746 | * LOCKING: | |
4747 | * Inherited from caller. | |
4748 | */ | |
0d5ff566 TH |
4749 | void ata_data_xfer_noirq(struct ata_device *adev, unsigned char *buf, |
4750 | unsigned int buflen, int write_data) | |
75e99585 AC |
4751 | { |
4752 | unsigned long flags; | |
4753 | local_irq_save(flags); | |
0d5ff566 | 4754 | ata_data_xfer(adev, buf, buflen, write_data); |
75e99585 AC |
4755 | local_irq_restore(flags); |
4756 | } | |
4757 | ||
4758 | ||
6ae4cfb5 | 4759 | /** |
5a5dbd18 | 4760 | * ata_pio_sector - Transfer a sector of data. |
6ae4cfb5 AL |
4761 | * @qc: Command on going |
4762 | * | |
5a5dbd18 | 4763 | * Transfer qc->sect_size bytes of data from/to the ATA device. |
6ae4cfb5 AL |
4764 | * |
4765 | * LOCKING: | |
4766 | * Inherited from caller. | |
4767 | */ | |
4768 | ||
1da177e4 LT |
4769 | static void ata_pio_sector(struct ata_queued_cmd *qc) |
4770 | { | |
4771 | int do_write = (qc->tf.flags & ATA_TFLAG_WRITE); | |
cedc9a47 | 4772 | struct scatterlist *sg = qc->__sg; |
1da177e4 LT |
4773 | struct ata_port *ap = qc->ap; |
4774 | struct page *page; | |
4775 | unsigned int offset; | |
4776 | unsigned char *buf; | |
4777 | ||
5a5dbd18 | 4778 | if (qc->curbytes == qc->nbytes - qc->sect_size) |
14be71f4 | 4779 | ap->hsm_task_state = HSM_ST_LAST; |
1da177e4 LT |
4780 | |
4781 | page = sg[qc->cursg].page; | |
726f0785 | 4782 | offset = sg[qc->cursg].offset + qc->cursg_ofs; |
1da177e4 LT |
4783 | |
4784 | /* get the current page and offset */ | |
4785 | page = nth_page(page, (offset >> PAGE_SHIFT)); | |
4786 | offset %= PAGE_SIZE; | |
4787 | ||
1da177e4 LT |
4788 | DPRINTK("data %s\n", qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read"); |
4789 | ||
91b8b313 AL |
4790 | if (PageHighMem(page)) { |
4791 | unsigned long flags; | |
4792 | ||
a6b2c5d4 | 4793 | /* FIXME: use a bounce buffer */ |
91b8b313 AL |
4794 | local_irq_save(flags); |
4795 | buf = kmap_atomic(page, KM_IRQ0); | |
083958d3 | 4796 | |
91b8b313 | 4797 | /* do the actual data transfer */ |
5a5dbd18 | 4798 | ap->ops->data_xfer(qc->dev, buf + offset, qc->sect_size, do_write); |
1da177e4 | 4799 | |
91b8b313 AL |
4800 | kunmap_atomic(buf, KM_IRQ0); |
4801 | local_irq_restore(flags); | |
4802 | } else { | |
4803 | buf = page_address(page); | |
5a5dbd18 | 4804 | ap->ops->data_xfer(qc->dev, buf + offset, qc->sect_size, do_write); |
91b8b313 | 4805 | } |
1da177e4 | 4806 | |
5a5dbd18 ML |
4807 | qc->curbytes += qc->sect_size; |
4808 | qc->cursg_ofs += qc->sect_size; | |
1da177e4 | 4809 | |
726f0785 | 4810 | if (qc->cursg_ofs == (&sg[qc->cursg])->length) { |
1da177e4 LT |
4811 | qc->cursg++; |
4812 | qc->cursg_ofs = 0; | |
4813 | } | |
1da177e4 | 4814 | } |
1da177e4 | 4815 | |
07f6f7d0 | 4816 | /** |
5a5dbd18 | 4817 | * ata_pio_sectors - Transfer one or many sectors. |
07f6f7d0 AL |
4818 | * @qc: Command on going |
4819 | * | |
5a5dbd18 | 4820 | * Transfer one or many sectors of data from/to the |
07f6f7d0 AL |
4821 | * ATA device for the DRQ request. |
4822 | * | |
4823 | * LOCKING: | |
4824 | * Inherited from caller. | |
4825 | */ | |
1da177e4 | 4826 | |
07f6f7d0 AL |
4827 | static void ata_pio_sectors(struct ata_queued_cmd *qc) |
4828 | { | |
4829 | if (is_multi_taskfile(&qc->tf)) { | |
4830 | /* READ/WRITE MULTIPLE */ | |
4831 | unsigned int nsect; | |
4832 | ||
587005de | 4833 | WARN_ON(qc->dev->multi_count == 0); |
1da177e4 | 4834 | |
5a5dbd18 | 4835 | nsect = min((qc->nbytes - qc->curbytes) / qc->sect_size, |
726f0785 | 4836 | qc->dev->multi_count); |
07f6f7d0 AL |
4837 | while (nsect--) |
4838 | ata_pio_sector(qc); | |
4839 | } else | |
4840 | ata_pio_sector(qc); | |
4cc980b3 AL |
4841 | |
4842 | ata_altstatus(qc->ap); /* flush */ | |
07f6f7d0 AL |
4843 | } |
4844 | ||
c71c1857 AL |
4845 | /** |
4846 | * atapi_send_cdb - Write CDB bytes to hardware | |
4847 | * @ap: Port to which ATAPI device is attached. | |
4848 | * @qc: Taskfile currently active | |
4849 | * | |
4850 | * When device has indicated its readiness to accept | |
4851 | * a CDB, this function is called. Send the CDB. | |
4852 | * | |
4853 | * LOCKING: | |
4854 | * caller. | |
4855 | */ | |
4856 | ||
4857 | static void atapi_send_cdb(struct ata_port *ap, struct ata_queued_cmd *qc) | |
4858 | { | |
4859 | /* send SCSI cdb */ | |
4860 | DPRINTK("send cdb\n"); | |
db024d53 | 4861 | WARN_ON(qc->dev->cdb_len < 12); |
c71c1857 | 4862 | |
a6b2c5d4 | 4863 | ap->ops->data_xfer(qc->dev, qc->cdb, qc->dev->cdb_len, 1); |
c71c1857 AL |
4864 | ata_altstatus(ap); /* flush */ |
4865 | ||
4866 | switch (qc->tf.protocol) { | |
4867 | case ATA_PROT_ATAPI: | |
4868 | ap->hsm_task_state = HSM_ST; | |
4869 | break; | |
4870 | case ATA_PROT_ATAPI_NODATA: | |
4871 | ap->hsm_task_state = HSM_ST_LAST; | |
4872 | break; | |
4873 | case ATA_PROT_ATAPI_DMA: | |
4874 | ap->hsm_task_state = HSM_ST_LAST; | |
4875 | /* initiate bmdma */ | |
4876 | ap->ops->bmdma_start(qc); | |
4877 | break; | |
4878 | } | |
1da177e4 LT |
4879 | } |
4880 | ||
6ae4cfb5 AL |
4881 | /** |
4882 | * __atapi_pio_bytes - Transfer data from/to the ATAPI device. | |
4883 | * @qc: Command on going | |
4884 | * @bytes: number of bytes | |
4885 | * | |
4886 | * Transfer Transfer data from/to the ATAPI device. | |
4887 | * | |
4888 | * LOCKING: | |
4889 | * Inherited from caller. | |
4890 | * | |
4891 | */ | |
4892 | ||
1da177e4 LT |
4893 | static void __atapi_pio_bytes(struct ata_queued_cmd *qc, unsigned int bytes) |
4894 | { | |
4895 | int do_write = (qc->tf.flags & ATA_TFLAG_WRITE); | |
cedc9a47 | 4896 | struct scatterlist *sg = qc->__sg; |
1da177e4 LT |
4897 | struct ata_port *ap = qc->ap; |
4898 | struct page *page; | |
4899 | unsigned char *buf; | |
4900 | unsigned int offset, count; | |
4901 | ||
563a6e1f | 4902 | if (qc->curbytes + bytes >= qc->nbytes) |
14be71f4 | 4903 | ap->hsm_task_state = HSM_ST_LAST; |
1da177e4 LT |
4904 | |
4905 | next_sg: | |
563a6e1f | 4906 | if (unlikely(qc->cursg >= qc->n_elem)) { |
7fb6ec28 | 4907 | /* |
563a6e1f AL |
4908 | * The end of qc->sg is reached and the device expects |
4909 | * more data to transfer. In order not to overrun qc->sg | |
4910 | * and fulfill length specified in the byte count register, | |
4911 | * - for read case, discard trailing data from the device | |
4912 | * - for write case, padding zero data to the device | |
4913 | */ | |
4914 | u16 pad_buf[1] = { 0 }; | |
4915 | unsigned int words = bytes >> 1; | |
4916 | unsigned int i; | |
4917 | ||
4918 | if (words) /* warning if bytes > 1 */ | |
f15a1daf TH |
4919 | ata_dev_printk(qc->dev, KERN_WARNING, |
4920 | "%u bytes trailing data\n", bytes); | |
563a6e1f AL |
4921 | |
4922 | for (i = 0; i < words; i++) | |
a6b2c5d4 | 4923 | ap->ops->data_xfer(qc->dev, (unsigned char*)pad_buf, 2, do_write); |
563a6e1f | 4924 | |
14be71f4 | 4925 | ap->hsm_task_state = HSM_ST_LAST; |
563a6e1f AL |
4926 | return; |
4927 | } | |
4928 | ||
cedc9a47 | 4929 | sg = &qc->__sg[qc->cursg]; |
1da177e4 | 4930 | |
1da177e4 LT |
4931 | page = sg->page; |
4932 | offset = sg->offset + qc->cursg_ofs; | |
4933 | ||
4934 | /* get the current page and offset */ | |
4935 | page = nth_page(page, (offset >> PAGE_SHIFT)); | |
4936 | offset %= PAGE_SIZE; | |
4937 | ||
6952df03 | 4938 | /* don't overrun current sg */ |
32529e01 | 4939 | count = min(sg->length - qc->cursg_ofs, bytes); |
1da177e4 LT |
4940 | |
4941 | /* don't cross page boundaries */ | |
4942 | count = min(count, (unsigned int)PAGE_SIZE - offset); | |
4943 | ||
7282aa4b AL |
4944 | DPRINTK("data %s\n", qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read"); |
4945 | ||
91b8b313 AL |
4946 | if (PageHighMem(page)) { |
4947 | unsigned long flags; | |
4948 | ||
a6b2c5d4 | 4949 | /* FIXME: use bounce buffer */ |
91b8b313 AL |
4950 | local_irq_save(flags); |
4951 | buf = kmap_atomic(page, KM_IRQ0); | |
083958d3 | 4952 | |
91b8b313 | 4953 | /* do the actual data transfer */ |
a6b2c5d4 | 4954 | ap->ops->data_xfer(qc->dev, buf + offset, count, do_write); |
7282aa4b | 4955 | |
91b8b313 AL |
4956 | kunmap_atomic(buf, KM_IRQ0); |
4957 | local_irq_restore(flags); | |
4958 | } else { | |
4959 | buf = page_address(page); | |
a6b2c5d4 | 4960 | ap->ops->data_xfer(qc->dev, buf + offset, count, do_write); |
91b8b313 | 4961 | } |
1da177e4 LT |
4962 | |
4963 | bytes -= count; | |
4964 | qc->curbytes += count; | |
4965 | qc->cursg_ofs += count; | |
4966 | ||
32529e01 | 4967 | if (qc->cursg_ofs == sg->length) { |
1da177e4 LT |
4968 | qc->cursg++; |
4969 | qc->cursg_ofs = 0; | |
4970 | } | |
4971 | ||
563a6e1f | 4972 | if (bytes) |
1da177e4 | 4973 | goto next_sg; |
1da177e4 LT |
4974 | } |
4975 | ||
6ae4cfb5 AL |
4976 | /** |
4977 | * atapi_pio_bytes - Transfer data from/to the ATAPI device. | |
4978 | * @qc: Command on going | |
4979 | * | |
4980 | * Transfer Transfer data from/to the ATAPI device. | |
4981 | * | |
4982 | * LOCKING: | |
4983 | * Inherited from caller. | |
6ae4cfb5 AL |
4984 | */ |
4985 | ||
1da177e4 LT |
4986 | static void atapi_pio_bytes(struct ata_queued_cmd *qc) |
4987 | { | |
4988 | struct ata_port *ap = qc->ap; | |
4989 | struct ata_device *dev = qc->dev; | |
4990 | unsigned int ireason, bc_lo, bc_hi, bytes; | |
4991 | int i_write, do_write = (qc->tf.flags & ATA_TFLAG_WRITE) ? 1 : 0; | |
4992 | ||
eec4c3f3 AL |
4993 | /* Abuse qc->result_tf for temp storage of intermediate TF |
4994 | * here to save some kernel stack usage. | |
4995 | * For normal completion, qc->result_tf is not relevant. For | |
4996 | * error, qc->result_tf is later overwritten by ata_qc_complete(). | |
4997 | * So, the correctness of qc->result_tf is not affected. | |
4998 | */ | |
4999 | ap->ops->tf_read(ap, &qc->result_tf); | |
5000 | ireason = qc->result_tf.nsect; | |
5001 | bc_lo = qc->result_tf.lbam; | |
5002 | bc_hi = qc->result_tf.lbah; | |
1da177e4 LT |
5003 | bytes = (bc_hi << 8) | bc_lo; |
5004 | ||
5005 | /* shall be cleared to zero, indicating xfer of data */ | |
5006 | if (ireason & (1 << 0)) | |
5007 | goto err_out; | |
5008 | ||
5009 | /* make sure transfer direction matches expected */ | |
5010 | i_write = ((ireason & (1 << 1)) == 0) ? 1 : 0; | |
5011 | if (do_write != i_write) | |
5012 | goto err_out; | |
5013 | ||
44877b4e | 5014 | VPRINTK("ata%u: xfering %d bytes\n", ap->print_id, bytes); |
312f7da2 | 5015 | |
1da177e4 | 5016 | __atapi_pio_bytes(qc, bytes); |
4cc980b3 | 5017 | ata_altstatus(ap); /* flush */ |
1da177e4 LT |
5018 | |
5019 | return; | |
5020 | ||
5021 | err_out: | |
f15a1daf | 5022 | ata_dev_printk(dev, KERN_INFO, "ATAPI check failed\n"); |
11a56d24 | 5023 | qc->err_mask |= AC_ERR_HSM; |
14be71f4 | 5024 | ap->hsm_task_state = HSM_ST_ERR; |
1da177e4 LT |
5025 | } |
5026 | ||
5027 | /** | |
c234fb00 AL |
5028 | * ata_hsm_ok_in_wq - Check if the qc can be handled in the workqueue. |
5029 | * @ap: the target ata_port | |
5030 | * @qc: qc on going | |
1da177e4 | 5031 | * |
c234fb00 AL |
5032 | * RETURNS: |
5033 | * 1 if ok in workqueue, 0 otherwise. | |
1da177e4 | 5034 | */ |
c234fb00 AL |
5035 | |
5036 | static inline int ata_hsm_ok_in_wq(struct ata_port *ap, struct ata_queued_cmd *qc) | |
1da177e4 | 5037 | { |
c234fb00 AL |
5038 | if (qc->tf.flags & ATA_TFLAG_POLLING) |
5039 | return 1; | |
1da177e4 | 5040 | |
c234fb00 AL |
5041 | if (ap->hsm_task_state == HSM_ST_FIRST) { |
5042 | if (qc->tf.protocol == ATA_PROT_PIO && | |
5043 | (qc->tf.flags & ATA_TFLAG_WRITE)) | |
5044 | return 1; | |
1da177e4 | 5045 | |
c234fb00 AL |
5046 | if (is_atapi_taskfile(&qc->tf) && |
5047 | !(qc->dev->flags & ATA_DFLAG_CDB_INTR)) | |
5048 | return 1; | |
fe79e683 AL |
5049 | } |
5050 | ||
c234fb00 AL |
5051 | return 0; |
5052 | } | |
1da177e4 | 5053 | |
c17ea20d TH |
5054 | /** |
5055 | * ata_hsm_qc_complete - finish a qc running on standard HSM | |
5056 | * @qc: Command to complete | |
5057 | * @in_wq: 1 if called from workqueue, 0 otherwise | |
5058 | * | |
5059 | * Finish @qc which is running on standard HSM. | |
5060 | * | |
5061 | * LOCKING: | |
cca3974e | 5062 | * If @in_wq is zero, spin_lock_irqsave(host lock). |
c17ea20d TH |
5063 | * Otherwise, none on entry and grabs host lock. |
5064 | */ | |
5065 | static void ata_hsm_qc_complete(struct ata_queued_cmd *qc, int in_wq) | |
5066 | { | |
5067 | struct ata_port *ap = qc->ap; | |
5068 | unsigned long flags; | |
5069 | ||
5070 | if (ap->ops->error_handler) { | |
5071 | if (in_wq) { | |
ba6a1308 | 5072 | spin_lock_irqsave(ap->lock, flags); |
c17ea20d | 5073 | |
cca3974e JG |
5074 | /* EH might have kicked in while host lock is |
5075 | * released. | |
c17ea20d TH |
5076 | */ |
5077 | qc = ata_qc_from_tag(ap, qc->tag); | |
5078 | if (qc) { | |
5079 | if (likely(!(qc->err_mask & AC_ERR_HSM))) { | |
83625006 | 5080 | ap->ops->irq_on(ap); |
c17ea20d TH |
5081 | ata_qc_complete(qc); |
5082 | } else | |
5083 | ata_port_freeze(ap); | |
5084 | } | |
5085 | ||
ba6a1308 | 5086 | spin_unlock_irqrestore(ap->lock, flags); |
c17ea20d TH |
5087 | } else { |
5088 | if (likely(!(qc->err_mask & AC_ERR_HSM))) | |
5089 | ata_qc_complete(qc); | |
5090 | else | |
5091 | ata_port_freeze(ap); | |
5092 | } | |
5093 | } else { | |
5094 | if (in_wq) { | |
ba6a1308 | 5095 | spin_lock_irqsave(ap->lock, flags); |
83625006 | 5096 | ap->ops->irq_on(ap); |
c17ea20d | 5097 | ata_qc_complete(qc); |
ba6a1308 | 5098 | spin_unlock_irqrestore(ap->lock, flags); |
c17ea20d TH |
5099 | } else |
5100 | ata_qc_complete(qc); | |
5101 | } | |
5102 | } | |
5103 | ||
bb5cb290 AL |
5104 | /** |
5105 | * ata_hsm_move - move the HSM to the next state. | |
5106 | * @ap: the target ata_port | |
5107 | * @qc: qc on going | |
5108 | * @status: current device status | |
5109 | * @in_wq: 1 if called from workqueue, 0 otherwise | |
5110 | * | |
5111 | * RETURNS: | |
5112 | * 1 when poll next status needed, 0 otherwise. | |
5113 | */ | |
9a1004d0 TH |
5114 | int ata_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc, |
5115 | u8 status, int in_wq) | |
e2cec771 | 5116 | { |
bb5cb290 AL |
5117 | unsigned long flags = 0; |
5118 | int poll_next; | |
5119 | ||
6912ccd5 AL |
5120 | WARN_ON((qc->flags & ATA_QCFLAG_ACTIVE) == 0); |
5121 | ||
bb5cb290 AL |
5122 | /* Make sure ata_qc_issue_prot() does not throw things |
5123 | * like DMA polling into the workqueue. Notice that | |
5124 | * in_wq is not equivalent to (qc->tf.flags & ATA_TFLAG_POLLING). | |
5125 | */ | |
c234fb00 | 5126 | WARN_ON(in_wq != ata_hsm_ok_in_wq(ap, qc)); |
bb5cb290 | 5127 | |
e2cec771 | 5128 | fsm_start: |
999bb6f4 | 5129 | DPRINTK("ata%u: protocol %d task_state %d (dev_stat 0x%X)\n", |
44877b4e | 5130 | ap->print_id, qc->tf.protocol, ap->hsm_task_state, status); |
999bb6f4 | 5131 | |
e2cec771 AL |
5132 | switch (ap->hsm_task_state) { |
5133 | case HSM_ST_FIRST: | |
bb5cb290 AL |
5134 | /* Send first data block or PACKET CDB */ |
5135 | ||
5136 | /* If polling, we will stay in the work queue after | |
5137 | * sending the data. Otherwise, interrupt handler | |
5138 | * takes over after sending the data. | |
5139 | */ | |
5140 | poll_next = (qc->tf.flags & ATA_TFLAG_POLLING); | |
5141 | ||
e2cec771 | 5142 | /* check device status */ |
3655d1d3 AL |
5143 | if (unlikely((status & ATA_DRQ) == 0)) { |
5144 | /* handle BSY=0, DRQ=0 as error */ | |
5145 | if (likely(status & (ATA_ERR | ATA_DF))) | |
5146 | /* device stops HSM for abort/error */ | |
5147 | qc->err_mask |= AC_ERR_DEV; | |
5148 | else | |
5149 | /* HSM violation. Let EH handle this */ | |
5150 | qc->err_mask |= AC_ERR_HSM; | |
5151 | ||
14be71f4 | 5152 | ap->hsm_task_state = HSM_ST_ERR; |
e2cec771 | 5153 | goto fsm_start; |
1da177e4 LT |
5154 | } |
5155 | ||
71601958 AL |
5156 | /* Device should not ask for data transfer (DRQ=1) |
5157 | * when it finds something wrong. | |
eee6c32f AL |
5158 | * We ignore DRQ here and stop the HSM by |
5159 | * changing hsm_task_state to HSM_ST_ERR and | |
5160 | * let the EH abort the command or reset the device. | |
71601958 AL |
5161 | */ |
5162 | if (unlikely(status & (ATA_ERR | ATA_DF))) { | |
44877b4e TH |
5163 | ata_port_printk(ap, KERN_WARNING, "DRQ=1 with device " |
5164 | "error, dev_stat 0x%X\n", status); | |
3655d1d3 | 5165 | qc->err_mask |= AC_ERR_HSM; |
eee6c32f AL |
5166 | ap->hsm_task_state = HSM_ST_ERR; |
5167 | goto fsm_start; | |
71601958 | 5168 | } |
1da177e4 | 5169 | |
bb5cb290 AL |
5170 | /* Send the CDB (atapi) or the first data block (ata pio out). |
5171 | * During the state transition, interrupt handler shouldn't | |
5172 | * be invoked before the data transfer is complete and | |
5173 | * hsm_task_state is changed. Hence, the following locking. | |
5174 | */ | |
5175 | if (in_wq) | |
ba6a1308 | 5176 | spin_lock_irqsave(ap->lock, flags); |
1da177e4 | 5177 | |
bb5cb290 AL |
5178 | if (qc->tf.protocol == ATA_PROT_PIO) { |
5179 | /* PIO data out protocol. | |
5180 | * send first data block. | |
5181 | */ | |
0565c26d | 5182 | |
bb5cb290 AL |
5183 | /* ata_pio_sectors() might change the state |
5184 | * to HSM_ST_LAST. so, the state is changed here | |
5185 | * before ata_pio_sectors(). | |
5186 | */ | |
5187 | ap->hsm_task_state = HSM_ST; | |
5188 | ata_pio_sectors(qc); | |
bb5cb290 AL |
5189 | } else |
5190 | /* send CDB */ | |
5191 | atapi_send_cdb(ap, qc); | |
5192 | ||
5193 | if (in_wq) | |
ba6a1308 | 5194 | spin_unlock_irqrestore(ap->lock, flags); |
bb5cb290 AL |
5195 | |
5196 | /* if polling, ata_pio_task() handles the rest. | |
5197 | * otherwise, interrupt handler takes over from here. | |
5198 | */ | |
e2cec771 | 5199 | break; |
1c848984 | 5200 | |
e2cec771 AL |
5201 | case HSM_ST: |
5202 | /* complete command or read/write the data register */ | |
5203 | if (qc->tf.protocol == ATA_PROT_ATAPI) { | |
5204 | /* ATAPI PIO protocol */ | |
5205 | if ((status & ATA_DRQ) == 0) { | |
3655d1d3 AL |
5206 | /* No more data to transfer or device error. |
5207 | * Device error will be tagged in HSM_ST_LAST. | |
5208 | */ | |
e2cec771 AL |
5209 | ap->hsm_task_state = HSM_ST_LAST; |
5210 | goto fsm_start; | |
5211 | } | |
1da177e4 | 5212 | |
71601958 AL |
5213 | /* Device should not ask for data transfer (DRQ=1) |
5214 | * when it finds something wrong. | |
eee6c32f AL |
5215 | * We ignore DRQ here and stop the HSM by |
5216 | * changing hsm_task_state to HSM_ST_ERR and | |
5217 | * let the EH abort the command or reset the device. | |
71601958 AL |
5218 | */ |
5219 | if (unlikely(status & (ATA_ERR | ATA_DF))) { | |
44877b4e TH |
5220 | ata_port_printk(ap, KERN_WARNING, "DRQ=1 with " |
5221 | "device error, dev_stat 0x%X\n", | |
5222 | status); | |
3655d1d3 | 5223 | qc->err_mask |= AC_ERR_HSM; |
eee6c32f AL |
5224 | ap->hsm_task_state = HSM_ST_ERR; |
5225 | goto fsm_start; | |
71601958 | 5226 | } |
1da177e4 | 5227 | |
e2cec771 | 5228 | atapi_pio_bytes(qc); |
7fb6ec28 | 5229 | |
e2cec771 AL |
5230 | if (unlikely(ap->hsm_task_state == HSM_ST_ERR)) |
5231 | /* bad ireason reported by device */ | |
5232 | goto fsm_start; | |
1da177e4 | 5233 | |
e2cec771 AL |
5234 | } else { |
5235 | /* ATA PIO protocol */ | |
5236 | if (unlikely((status & ATA_DRQ) == 0)) { | |
5237 | /* handle BSY=0, DRQ=0 as error */ | |
3655d1d3 AL |
5238 | if (likely(status & (ATA_ERR | ATA_DF))) |
5239 | /* device stops HSM for abort/error */ | |
5240 | qc->err_mask |= AC_ERR_DEV; | |
5241 | else | |
55a8e2c8 TH |
5242 | /* HSM violation. Let EH handle this. |
5243 | * Phantom devices also trigger this | |
5244 | * condition. Mark hint. | |
5245 | */ | |
5246 | qc->err_mask |= AC_ERR_HSM | | |
5247 | AC_ERR_NODEV_HINT; | |
3655d1d3 | 5248 | |
e2cec771 AL |
5249 | ap->hsm_task_state = HSM_ST_ERR; |
5250 | goto fsm_start; | |
5251 | } | |
1da177e4 | 5252 | |
eee6c32f AL |
5253 | /* For PIO reads, some devices may ask for |
5254 | * data transfer (DRQ=1) alone with ERR=1. | |
5255 | * We respect DRQ here and transfer one | |
5256 | * block of junk data before changing the | |
5257 | * hsm_task_state to HSM_ST_ERR. | |
5258 | * | |
5259 | * For PIO writes, ERR=1 DRQ=1 doesn't make | |
5260 | * sense since the data block has been | |
5261 | * transferred to the device. | |
71601958 AL |
5262 | */ |
5263 | if (unlikely(status & (ATA_ERR | ATA_DF))) { | |
71601958 AL |
5264 | /* data might be corrputed */ |
5265 | qc->err_mask |= AC_ERR_DEV; | |
eee6c32f AL |
5266 | |
5267 | if (!(qc->tf.flags & ATA_TFLAG_WRITE)) { | |
5268 | ata_pio_sectors(qc); | |
eee6c32f AL |
5269 | status = ata_wait_idle(ap); |
5270 | } | |
5271 | ||
3655d1d3 AL |
5272 | if (status & (ATA_BUSY | ATA_DRQ)) |
5273 | qc->err_mask |= AC_ERR_HSM; | |
5274 | ||
eee6c32f AL |
5275 | /* ata_pio_sectors() might change the |
5276 | * state to HSM_ST_LAST. so, the state | |
5277 | * is changed after ata_pio_sectors(). | |
5278 | */ | |
5279 | ap->hsm_task_state = HSM_ST_ERR; | |
5280 | goto fsm_start; | |
71601958 AL |
5281 | } |
5282 | ||
e2cec771 AL |
5283 | ata_pio_sectors(qc); |
5284 | ||
5285 | if (ap->hsm_task_state == HSM_ST_LAST && | |
5286 | (!(qc->tf.flags & ATA_TFLAG_WRITE))) { | |
5287 | /* all data read */ | |
52a32205 | 5288 | status = ata_wait_idle(ap); |
e2cec771 AL |
5289 | goto fsm_start; |
5290 | } | |
5291 | } | |
5292 | ||
bb5cb290 | 5293 | poll_next = 1; |
1da177e4 LT |
5294 | break; |
5295 | ||
14be71f4 | 5296 | case HSM_ST_LAST: |
6912ccd5 AL |
5297 | if (unlikely(!ata_ok(status))) { |
5298 | qc->err_mask |= __ac_err_mask(status); | |
e2cec771 AL |
5299 | ap->hsm_task_state = HSM_ST_ERR; |
5300 | goto fsm_start; | |
5301 | } | |
5302 | ||
5303 | /* no more data to transfer */ | |
4332a771 | 5304 | DPRINTK("ata%u: dev %u command complete, drv_stat 0x%x\n", |
44877b4e | 5305 | ap->print_id, qc->dev->devno, status); |
e2cec771 | 5306 | |
6912ccd5 AL |
5307 | WARN_ON(qc->err_mask); |
5308 | ||
e2cec771 | 5309 | ap->hsm_task_state = HSM_ST_IDLE; |
1da177e4 | 5310 | |
e2cec771 | 5311 | /* complete taskfile transaction */ |
c17ea20d | 5312 | ata_hsm_qc_complete(qc, in_wq); |
bb5cb290 AL |
5313 | |
5314 | poll_next = 0; | |
1da177e4 LT |
5315 | break; |
5316 | ||
14be71f4 | 5317 | case HSM_ST_ERR: |
e2cec771 AL |
5318 | /* make sure qc->err_mask is available to |
5319 | * know what's wrong and recover | |
5320 | */ | |
5321 | WARN_ON(qc->err_mask == 0); | |
5322 | ||
5323 | ap->hsm_task_state = HSM_ST_IDLE; | |
bb5cb290 | 5324 | |
999bb6f4 | 5325 | /* complete taskfile transaction */ |
c17ea20d | 5326 | ata_hsm_qc_complete(qc, in_wq); |
bb5cb290 AL |
5327 | |
5328 | poll_next = 0; | |
e2cec771 AL |
5329 | break; |
5330 | default: | |
bb5cb290 | 5331 | poll_next = 0; |
6912ccd5 | 5332 | BUG(); |
1da177e4 LT |
5333 | } |
5334 | ||
bb5cb290 | 5335 | return poll_next; |
1da177e4 LT |
5336 | } |
5337 | ||
65f27f38 | 5338 | static void ata_pio_task(struct work_struct *work) |
8061f5f0 | 5339 | { |
65f27f38 DH |
5340 | struct ata_port *ap = |
5341 | container_of(work, struct ata_port, port_task.work); | |
5342 | struct ata_queued_cmd *qc = ap->port_task_data; | |
8061f5f0 | 5343 | u8 status; |
a1af3734 | 5344 | int poll_next; |
8061f5f0 | 5345 | |
7fb6ec28 | 5346 | fsm_start: |
a1af3734 | 5347 | WARN_ON(ap->hsm_task_state == HSM_ST_IDLE); |
8061f5f0 | 5348 | |
a1af3734 AL |
5349 | /* |
5350 | * This is purely heuristic. This is a fast path. | |
5351 | * Sometimes when we enter, BSY will be cleared in | |
5352 | * a chk-status or two. If not, the drive is probably seeking | |
5353 | * or something. Snooze for a couple msecs, then | |
5354 | * chk-status again. If still busy, queue delayed work. | |
5355 | */ | |
5356 | status = ata_busy_wait(ap, ATA_BUSY, 5); | |
5357 | if (status & ATA_BUSY) { | |
5358 | msleep(2); | |
5359 | status = ata_busy_wait(ap, ATA_BUSY, 10); | |
5360 | if (status & ATA_BUSY) { | |
31ce6dae | 5361 | ata_port_queue_task(ap, ata_pio_task, qc, ATA_SHORT_PAUSE); |
a1af3734 AL |
5362 | return; |
5363 | } | |
8061f5f0 TH |
5364 | } |
5365 | ||
a1af3734 AL |
5366 | /* move the HSM */ |
5367 | poll_next = ata_hsm_move(ap, qc, status, 1); | |
8061f5f0 | 5368 | |
a1af3734 AL |
5369 | /* another command or interrupt handler |
5370 | * may be running at this point. | |
5371 | */ | |
5372 | if (poll_next) | |
7fb6ec28 | 5373 | goto fsm_start; |
8061f5f0 TH |
5374 | } |
5375 | ||
1da177e4 LT |
5376 | /** |
5377 | * ata_qc_new - Request an available ATA command, for queueing | |
5378 | * @ap: Port associated with device @dev | |
5379 | * @dev: Device from whom we request an available command structure | |
5380 | * | |
5381 | * LOCKING: | |
0cba632b | 5382 | * None. |
1da177e4 LT |
5383 | */ |
5384 | ||
5385 | static struct ata_queued_cmd *ata_qc_new(struct ata_port *ap) | |
5386 | { | |
5387 | struct ata_queued_cmd *qc = NULL; | |
5388 | unsigned int i; | |
5389 | ||
e3180499 | 5390 | /* no command while frozen */ |
b51e9e5d | 5391 | if (unlikely(ap->pflags & ATA_PFLAG_FROZEN)) |
e3180499 TH |
5392 | return NULL; |
5393 | ||
2ab7db1f TH |
5394 | /* the last tag is reserved for internal command. */ |
5395 | for (i = 0; i < ATA_MAX_QUEUE - 1; i++) | |
6cec4a39 | 5396 | if (!test_and_set_bit(i, &ap->qc_allocated)) { |
f69499f4 | 5397 | qc = __ata_qc_from_tag(ap, i); |
1da177e4 LT |
5398 | break; |
5399 | } | |
5400 | ||
5401 | if (qc) | |
5402 | qc->tag = i; | |
5403 | ||
5404 | return qc; | |
5405 | } | |
5406 | ||
5407 | /** | |
5408 | * ata_qc_new_init - Request an available ATA command, and initialize it | |
1da177e4 LT |
5409 | * @dev: Device from whom we request an available command structure |
5410 | * | |
5411 | * LOCKING: | |
0cba632b | 5412 | * None. |
1da177e4 LT |
5413 | */ |
5414 | ||
3373efd8 | 5415 | struct ata_queued_cmd *ata_qc_new_init(struct ata_device *dev) |
1da177e4 | 5416 | { |
9af5c9c9 | 5417 | struct ata_port *ap = dev->link->ap; |
1da177e4 LT |
5418 | struct ata_queued_cmd *qc; |
5419 | ||
5420 | qc = ata_qc_new(ap); | |
5421 | if (qc) { | |
1da177e4 LT |
5422 | qc->scsicmd = NULL; |
5423 | qc->ap = ap; | |
5424 | qc->dev = dev; | |
1da177e4 | 5425 | |
2c13b7ce | 5426 | ata_qc_reinit(qc); |
1da177e4 LT |
5427 | } |
5428 | ||
5429 | return qc; | |
5430 | } | |
5431 | ||
1da177e4 LT |
5432 | /** |
5433 | * ata_qc_free - free unused ata_queued_cmd | |
5434 | * @qc: Command to complete | |
5435 | * | |
5436 | * Designed to free unused ata_queued_cmd object | |
5437 | * in case something prevents using it. | |
5438 | * | |
5439 | * LOCKING: | |
cca3974e | 5440 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
5441 | */ |
5442 | void ata_qc_free(struct ata_queued_cmd *qc) | |
5443 | { | |
4ba946e9 TH |
5444 | struct ata_port *ap = qc->ap; |
5445 | unsigned int tag; | |
5446 | ||
a4631474 | 5447 | WARN_ON(qc == NULL); /* ata_qc_from_tag _might_ return NULL */ |
1da177e4 | 5448 | |
4ba946e9 TH |
5449 | qc->flags = 0; |
5450 | tag = qc->tag; | |
5451 | if (likely(ata_tag_valid(tag))) { | |
4ba946e9 | 5452 | qc->tag = ATA_TAG_POISON; |
6cec4a39 | 5453 | clear_bit(tag, &ap->qc_allocated); |
4ba946e9 | 5454 | } |
1da177e4 LT |
5455 | } |
5456 | ||
76014427 | 5457 | void __ata_qc_complete(struct ata_queued_cmd *qc) |
1da177e4 | 5458 | { |
dedaf2b0 | 5459 | struct ata_port *ap = qc->ap; |
9af5c9c9 | 5460 | struct ata_link *link = qc->dev->link; |
dedaf2b0 | 5461 | |
a4631474 TH |
5462 | WARN_ON(qc == NULL); /* ata_qc_from_tag _might_ return NULL */ |
5463 | WARN_ON(!(qc->flags & ATA_QCFLAG_ACTIVE)); | |
1da177e4 LT |
5464 | |
5465 | if (likely(qc->flags & ATA_QCFLAG_DMAMAP)) | |
5466 | ata_sg_clean(qc); | |
5467 | ||
7401abf2 | 5468 | /* command should be marked inactive atomically with qc completion */ |
da917d69 | 5469 | if (qc->tf.protocol == ATA_PROT_NCQ) { |
9af5c9c9 | 5470 | link->sactive &= ~(1 << qc->tag); |
da917d69 TH |
5471 | if (!link->sactive) |
5472 | ap->nr_active_links--; | |
5473 | } else { | |
9af5c9c9 | 5474 | link->active_tag = ATA_TAG_POISON; |
da917d69 TH |
5475 | ap->nr_active_links--; |
5476 | } | |
5477 | ||
5478 | /* clear exclusive status */ | |
5479 | if (unlikely(qc->flags & ATA_QCFLAG_CLEAR_EXCL && | |
5480 | ap->excl_link == link)) | |
5481 | ap->excl_link = NULL; | |
7401abf2 | 5482 | |
3f3791d3 AL |
5483 | /* atapi: mark qc as inactive to prevent the interrupt handler |
5484 | * from completing the command twice later, before the error handler | |
5485 | * is called. (when rc != 0 and atapi request sense is needed) | |
5486 | */ | |
5487 | qc->flags &= ~ATA_QCFLAG_ACTIVE; | |
dedaf2b0 | 5488 | ap->qc_active &= ~(1 << qc->tag); |
3f3791d3 | 5489 | |
1da177e4 | 5490 | /* call completion callback */ |
77853bf2 | 5491 | qc->complete_fn(qc); |
1da177e4 LT |
5492 | } |
5493 | ||
39599a53 TH |
5494 | static void fill_result_tf(struct ata_queued_cmd *qc) |
5495 | { | |
5496 | struct ata_port *ap = qc->ap; | |
5497 | ||
39599a53 | 5498 | qc->result_tf.flags = qc->tf.flags; |
4742d54f | 5499 | ap->ops->tf_read(ap, &qc->result_tf); |
39599a53 TH |
5500 | } |
5501 | ||
f686bcb8 TH |
5502 | /** |
5503 | * ata_qc_complete - Complete an active ATA command | |
5504 | * @qc: Command to complete | |
5505 | * @err_mask: ATA Status register contents | |
5506 | * | |
5507 | * Indicate to the mid and upper layers that an ATA | |
5508 | * command has completed, with either an ok or not-ok status. | |
5509 | * | |
5510 | * LOCKING: | |
cca3974e | 5511 | * spin_lock_irqsave(host lock) |
f686bcb8 TH |
5512 | */ |
5513 | void ata_qc_complete(struct ata_queued_cmd *qc) | |
5514 | { | |
5515 | struct ata_port *ap = qc->ap; | |
5516 | ||
5517 | /* XXX: New EH and old EH use different mechanisms to | |
5518 | * synchronize EH with regular execution path. | |
5519 | * | |
5520 | * In new EH, a failed qc is marked with ATA_QCFLAG_FAILED. | |
5521 | * Normal execution path is responsible for not accessing a | |
5522 | * failed qc. libata core enforces the rule by returning NULL | |
5523 | * from ata_qc_from_tag() for failed qcs. | |
5524 | * | |
5525 | * Old EH depends on ata_qc_complete() nullifying completion | |
5526 | * requests if ATA_QCFLAG_EH_SCHEDULED is set. Old EH does | |
5527 | * not synchronize with interrupt handler. Only PIO task is | |
5528 | * taken care of. | |
5529 | */ | |
5530 | if (ap->ops->error_handler) { | |
b51e9e5d | 5531 | WARN_ON(ap->pflags & ATA_PFLAG_FROZEN); |
f686bcb8 TH |
5532 | |
5533 | if (unlikely(qc->err_mask)) | |
5534 | qc->flags |= ATA_QCFLAG_FAILED; | |
5535 | ||
5536 | if (unlikely(qc->flags & ATA_QCFLAG_FAILED)) { | |
5537 | if (!ata_tag_internal(qc->tag)) { | |
5538 | /* always fill result TF for failed qc */ | |
39599a53 | 5539 | fill_result_tf(qc); |
f686bcb8 TH |
5540 | ata_qc_schedule_eh(qc); |
5541 | return; | |
5542 | } | |
5543 | } | |
5544 | ||
5545 | /* read result TF if requested */ | |
5546 | if (qc->flags & ATA_QCFLAG_RESULT_TF) | |
39599a53 | 5547 | fill_result_tf(qc); |
f686bcb8 TH |
5548 | |
5549 | __ata_qc_complete(qc); | |
5550 | } else { | |
5551 | if (qc->flags & ATA_QCFLAG_EH_SCHEDULED) | |
5552 | return; | |
5553 | ||
5554 | /* read result TF if failed or requested */ | |
5555 | if (qc->err_mask || qc->flags & ATA_QCFLAG_RESULT_TF) | |
39599a53 | 5556 | fill_result_tf(qc); |
f686bcb8 TH |
5557 | |
5558 | __ata_qc_complete(qc); | |
5559 | } | |
5560 | } | |
5561 | ||
dedaf2b0 TH |
5562 | /** |
5563 | * ata_qc_complete_multiple - Complete multiple qcs successfully | |
5564 | * @ap: port in question | |
5565 | * @qc_active: new qc_active mask | |
5566 | * @finish_qc: LLDD callback invoked before completing a qc | |
5567 | * | |
5568 | * Complete in-flight commands. This functions is meant to be | |
5569 | * called from low-level driver's interrupt routine to complete | |
5570 | * requests normally. ap->qc_active and @qc_active is compared | |
5571 | * and commands are completed accordingly. | |
5572 | * | |
5573 | * LOCKING: | |
cca3974e | 5574 | * spin_lock_irqsave(host lock) |
dedaf2b0 TH |
5575 | * |
5576 | * RETURNS: | |
5577 | * Number of completed commands on success, -errno otherwise. | |
5578 | */ | |
5579 | int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active, | |
5580 | void (*finish_qc)(struct ata_queued_cmd *)) | |
5581 | { | |
5582 | int nr_done = 0; | |
5583 | u32 done_mask; | |
5584 | int i; | |
5585 | ||
5586 | done_mask = ap->qc_active ^ qc_active; | |
5587 | ||
5588 | if (unlikely(done_mask & qc_active)) { | |
5589 | ata_port_printk(ap, KERN_ERR, "illegal qc_active transition " | |
5590 | "(%08x->%08x)\n", ap->qc_active, qc_active); | |
5591 | return -EINVAL; | |
5592 | } | |
5593 | ||
5594 | for (i = 0; i < ATA_MAX_QUEUE; i++) { | |
5595 | struct ata_queued_cmd *qc; | |
5596 | ||
5597 | if (!(done_mask & (1 << i))) | |
5598 | continue; | |
5599 | ||
5600 | if ((qc = ata_qc_from_tag(ap, i))) { | |
5601 | if (finish_qc) | |
5602 | finish_qc(qc); | |
5603 | ata_qc_complete(qc); | |
5604 | nr_done++; | |
5605 | } | |
5606 | } | |
5607 | ||
5608 | return nr_done; | |
5609 | } | |
5610 | ||
1da177e4 LT |
5611 | static inline int ata_should_dma_map(struct ata_queued_cmd *qc) |
5612 | { | |
5613 | struct ata_port *ap = qc->ap; | |
5614 | ||
5615 | switch (qc->tf.protocol) { | |
3dc1d881 | 5616 | case ATA_PROT_NCQ: |
1da177e4 LT |
5617 | case ATA_PROT_DMA: |
5618 | case ATA_PROT_ATAPI_DMA: | |
5619 | return 1; | |
5620 | ||
5621 | case ATA_PROT_ATAPI: | |
5622 | case ATA_PROT_PIO: | |
1da177e4 LT |
5623 | if (ap->flags & ATA_FLAG_PIO_DMA) |
5624 | return 1; | |
5625 | ||
5626 | /* fall through */ | |
5627 | ||
5628 | default: | |
5629 | return 0; | |
5630 | } | |
5631 | ||
5632 | /* never reached */ | |
5633 | } | |
5634 | ||
5635 | /** | |
5636 | * ata_qc_issue - issue taskfile to device | |
5637 | * @qc: command to issue to device | |
5638 | * | |
5639 | * Prepare an ATA command to submission to device. | |
5640 | * This includes mapping the data into a DMA-able | |
5641 | * area, filling in the S/G table, and finally | |
5642 | * writing the taskfile to hardware, starting the command. | |
5643 | * | |
5644 | * LOCKING: | |
cca3974e | 5645 | * spin_lock_irqsave(host lock) |
1da177e4 | 5646 | */ |
8e0e694a | 5647 | void ata_qc_issue(struct ata_queued_cmd *qc) |
1da177e4 LT |
5648 | { |
5649 | struct ata_port *ap = qc->ap; | |
9af5c9c9 | 5650 | struct ata_link *link = qc->dev->link; |
1da177e4 | 5651 | |
dedaf2b0 TH |
5652 | /* Make sure only one non-NCQ command is outstanding. The |
5653 | * check is skipped for old EH because it reuses active qc to | |
5654 | * request ATAPI sense. | |
5655 | */ | |
9af5c9c9 | 5656 | WARN_ON(ap->ops->error_handler && ata_tag_valid(link->active_tag)); |
dedaf2b0 TH |
5657 | |
5658 | if (qc->tf.protocol == ATA_PROT_NCQ) { | |
9af5c9c9 | 5659 | WARN_ON(link->sactive & (1 << qc->tag)); |
da917d69 TH |
5660 | |
5661 | if (!link->sactive) | |
5662 | ap->nr_active_links++; | |
9af5c9c9 | 5663 | link->sactive |= 1 << qc->tag; |
dedaf2b0 | 5664 | } else { |
9af5c9c9 | 5665 | WARN_ON(link->sactive); |
da917d69 TH |
5666 | |
5667 | ap->nr_active_links++; | |
9af5c9c9 | 5668 | link->active_tag = qc->tag; |
dedaf2b0 TH |
5669 | } |
5670 | ||
e4a70e76 | 5671 | qc->flags |= ATA_QCFLAG_ACTIVE; |
dedaf2b0 | 5672 | ap->qc_active |= 1 << qc->tag; |
e4a70e76 | 5673 | |
1da177e4 LT |
5674 | if (ata_should_dma_map(qc)) { |
5675 | if (qc->flags & ATA_QCFLAG_SG) { | |
5676 | if (ata_sg_setup(qc)) | |
8e436af9 | 5677 | goto sg_err; |
1da177e4 LT |
5678 | } else if (qc->flags & ATA_QCFLAG_SINGLE) { |
5679 | if (ata_sg_setup_one(qc)) | |
8e436af9 | 5680 | goto sg_err; |
1da177e4 LT |
5681 | } |
5682 | } else { | |
5683 | qc->flags &= ~ATA_QCFLAG_DMAMAP; | |
5684 | } | |
5685 | ||
5686 | ap->ops->qc_prep(qc); | |
5687 | ||
8e0e694a TH |
5688 | qc->err_mask |= ap->ops->qc_issue(qc); |
5689 | if (unlikely(qc->err_mask)) | |
5690 | goto err; | |
5691 | return; | |
1da177e4 | 5692 | |
8e436af9 TH |
5693 | sg_err: |
5694 | qc->flags &= ~ATA_QCFLAG_DMAMAP; | |
8e0e694a TH |
5695 | qc->err_mask |= AC_ERR_SYSTEM; |
5696 | err: | |
5697 | ata_qc_complete(qc); | |
1da177e4 LT |
5698 | } |
5699 | ||
5700 | /** | |
5701 | * ata_qc_issue_prot - issue taskfile to device in proto-dependent manner | |
5702 | * @qc: command to issue to device | |
5703 | * | |
5704 | * Using various libata functions and hooks, this function | |
5705 | * starts an ATA command. ATA commands are grouped into | |
5706 | * classes called "protocols", and issuing each type of protocol | |
5707 | * is slightly different. | |
5708 | * | |
0baab86b EF |
5709 | * May be used as the qc_issue() entry in ata_port_operations. |
5710 | * | |
1da177e4 | 5711 | * LOCKING: |
cca3974e | 5712 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
5713 | * |
5714 | * RETURNS: | |
9a3d9eb0 | 5715 | * Zero on success, AC_ERR_* mask on failure |
1da177e4 LT |
5716 | */ |
5717 | ||
9a3d9eb0 | 5718 | unsigned int ata_qc_issue_prot(struct ata_queued_cmd *qc) |
1da177e4 LT |
5719 | { |
5720 | struct ata_port *ap = qc->ap; | |
5721 | ||
e50362ec AL |
5722 | /* Use polling pio if the LLD doesn't handle |
5723 | * interrupt driven pio and atapi CDB interrupt. | |
5724 | */ | |
5725 | if (ap->flags & ATA_FLAG_PIO_POLLING) { | |
5726 | switch (qc->tf.protocol) { | |
5727 | case ATA_PROT_PIO: | |
e3472cbe | 5728 | case ATA_PROT_NODATA: |
e50362ec AL |
5729 | case ATA_PROT_ATAPI: |
5730 | case ATA_PROT_ATAPI_NODATA: | |
5731 | qc->tf.flags |= ATA_TFLAG_POLLING; | |
5732 | break; | |
5733 | case ATA_PROT_ATAPI_DMA: | |
5734 | if (qc->dev->flags & ATA_DFLAG_CDB_INTR) | |
3a778275 | 5735 | /* see ata_dma_blacklisted() */ |
e50362ec AL |
5736 | BUG(); |
5737 | break; | |
5738 | default: | |
5739 | break; | |
5740 | } | |
5741 | } | |
5742 | ||
312f7da2 | 5743 | /* select the device */ |
1da177e4 LT |
5744 | ata_dev_select(ap, qc->dev->devno, 1, 0); |
5745 | ||
312f7da2 | 5746 | /* start the command */ |
1da177e4 LT |
5747 | switch (qc->tf.protocol) { |
5748 | case ATA_PROT_NODATA: | |
312f7da2 AL |
5749 | if (qc->tf.flags & ATA_TFLAG_POLLING) |
5750 | ata_qc_set_polling(qc); | |
5751 | ||
e5338254 | 5752 | ata_tf_to_host(ap, &qc->tf); |
312f7da2 AL |
5753 | ap->hsm_task_state = HSM_ST_LAST; |
5754 | ||
5755 | if (qc->tf.flags & ATA_TFLAG_POLLING) | |
31ce6dae | 5756 | ata_port_queue_task(ap, ata_pio_task, qc, 0); |
312f7da2 | 5757 | |
1da177e4 LT |
5758 | break; |
5759 | ||
5760 | case ATA_PROT_DMA: | |
587005de | 5761 | WARN_ON(qc->tf.flags & ATA_TFLAG_POLLING); |
312f7da2 | 5762 | |
1da177e4 LT |
5763 | ap->ops->tf_load(ap, &qc->tf); /* load tf registers */ |
5764 | ap->ops->bmdma_setup(qc); /* set up bmdma */ | |
5765 | ap->ops->bmdma_start(qc); /* initiate bmdma */ | |
312f7da2 | 5766 | ap->hsm_task_state = HSM_ST_LAST; |
1da177e4 LT |
5767 | break; |
5768 | ||
312f7da2 AL |
5769 | case ATA_PROT_PIO: |
5770 | if (qc->tf.flags & ATA_TFLAG_POLLING) | |
5771 | ata_qc_set_polling(qc); | |
1da177e4 | 5772 | |
e5338254 | 5773 | ata_tf_to_host(ap, &qc->tf); |
312f7da2 | 5774 | |
54f00389 AL |
5775 | if (qc->tf.flags & ATA_TFLAG_WRITE) { |
5776 | /* PIO data out protocol */ | |
5777 | ap->hsm_task_state = HSM_ST_FIRST; | |
31ce6dae | 5778 | ata_port_queue_task(ap, ata_pio_task, qc, 0); |
54f00389 AL |
5779 | |
5780 | /* always send first data block using | |
e27486db | 5781 | * the ata_pio_task() codepath. |
54f00389 | 5782 | */ |
312f7da2 | 5783 | } else { |
54f00389 AL |
5784 | /* PIO data in protocol */ |
5785 | ap->hsm_task_state = HSM_ST; | |
5786 | ||
5787 | if (qc->tf.flags & ATA_TFLAG_POLLING) | |
31ce6dae | 5788 | ata_port_queue_task(ap, ata_pio_task, qc, 0); |
54f00389 AL |
5789 | |
5790 | /* if polling, ata_pio_task() handles the rest. | |
5791 | * otherwise, interrupt handler takes over from here. | |
5792 | */ | |
312f7da2 AL |
5793 | } |
5794 | ||
1da177e4 LT |
5795 | break; |
5796 | ||
1da177e4 | 5797 | case ATA_PROT_ATAPI: |
1da177e4 | 5798 | case ATA_PROT_ATAPI_NODATA: |
312f7da2 AL |
5799 | if (qc->tf.flags & ATA_TFLAG_POLLING) |
5800 | ata_qc_set_polling(qc); | |
5801 | ||
e5338254 | 5802 | ata_tf_to_host(ap, &qc->tf); |
f6ef65e6 | 5803 | |
312f7da2 AL |
5804 | ap->hsm_task_state = HSM_ST_FIRST; |
5805 | ||
5806 | /* send cdb by polling if no cdb interrupt */ | |
5807 | if ((!(qc->dev->flags & ATA_DFLAG_CDB_INTR)) || | |
5808 | (qc->tf.flags & ATA_TFLAG_POLLING)) | |
31ce6dae | 5809 | ata_port_queue_task(ap, ata_pio_task, qc, 0); |
1da177e4 LT |
5810 | break; |
5811 | ||
5812 | case ATA_PROT_ATAPI_DMA: | |
587005de | 5813 | WARN_ON(qc->tf.flags & ATA_TFLAG_POLLING); |
312f7da2 | 5814 | |
1da177e4 LT |
5815 | ap->ops->tf_load(ap, &qc->tf); /* load tf registers */ |
5816 | ap->ops->bmdma_setup(qc); /* set up bmdma */ | |
312f7da2 AL |
5817 | ap->hsm_task_state = HSM_ST_FIRST; |
5818 | ||
5819 | /* send cdb by polling if no cdb interrupt */ | |
5820 | if (!(qc->dev->flags & ATA_DFLAG_CDB_INTR)) | |
31ce6dae | 5821 | ata_port_queue_task(ap, ata_pio_task, qc, 0); |
1da177e4 LT |
5822 | break; |
5823 | ||
5824 | default: | |
5825 | WARN_ON(1); | |
9a3d9eb0 | 5826 | return AC_ERR_SYSTEM; |
1da177e4 LT |
5827 | } |
5828 | ||
5829 | return 0; | |
5830 | } | |
5831 | ||
1da177e4 LT |
5832 | /** |
5833 | * ata_host_intr - Handle host interrupt for given (port, task) | |
5834 | * @ap: Port on which interrupt arrived (possibly...) | |
5835 | * @qc: Taskfile currently active in engine | |
5836 | * | |
5837 | * Handle host interrupt for given queued command. Currently, | |
5838 | * only DMA interrupts are handled. All other commands are | |
5839 | * handled via polling with interrupts disabled (nIEN bit). | |
5840 | * | |
5841 | * LOCKING: | |
cca3974e | 5842 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
5843 | * |
5844 | * RETURNS: | |
5845 | * One if interrupt was handled, zero if not (shared irq). | |
5846 | */ | |
5847 | ||
5848 | inline unsigned int ata_host_intr (struct ata_port *ap, | |
5849 | struct ata_queued_cmd *qc) | |
5850 | { | |
9af5c9c9 | 5851 | struct ata_eh_info *ehi = &ap->link.eh_info; |
312f7da2 | 5852 | u8 status, host_stat = 0; |
1da177e4 | 5853 | |
312f7da2 | 5854 | VPRINTK("ata%u: protocol %d task_state %d\n", |
44877b4e | 5855 | ap->print_id, qc->tf.protocol, ap->hsm_task_state); |
1da177e4 | 5856 | |
312f7da2 AL |
5857 | /* Check whether we are expecting interrupt in this state */ |
5858 | switch (ap->hsm_task_state) { | |
5859 | case HSM_ST_FIRST: | |
6912ccd5 AL |
5860 | /* Some pre-ATAPI-4 devices assert INTRQ |
5861 | * at this state when ready to receive CDB. | |
5862 | */ | |
1da177e4 | 5863 | |
312f7da2 AL |
5864 | /* Check the ATA_DFLAG_CDB_INTR flag is enough here. |
5865 | * The flag was turned on only for atapi devices. | |
5866 | * No need to check is_atapi_taskfile(&qc->tf) again. | |
5867 | */ | |
5868 | if (!(qc->dev->flags & ATA_DFLAG_CDB_INTR)) | |
1da177e4 | 5869 | goto idle_irq; |
1da177e4 | 5870 | break; |
312f7da2 AL |
5871 | case HSM_ST_LAST: |
5872 | if (qc->tf.protocol == ATA_PROT_DMA || | |
5873 | qc->tf.protocol == ATA_PROT_ATAPI_DMA) { | |
5874 | /* check status of DMA engine */ | |
5875 | host_stat = ap->ops->bmdma_status(ap); | |
44877b4e TH |
5876 | VPRINTK("ata%u: host_stat 0x%X\n", |
5877 | ap->print_id, host_stat); | |
312f7da2 AL |
5878 | |
5879 | /* if it's not our irq... */ | |
5880 | if (!(host_stat & ATA_DMA_INTR)) | |
5881 | goto idle_irq; | |
5882 | ||
5883 | /* before we do anything else, clear DMA-Start bit */ | |
5884 | ap->ops->bmdma_stop(qc); | |
a4f16610 AL |
5885 | |
5886 | if (unlikely(host_stat & ATA_DMA_ERR)) { | |
5887 | /* error when transfering data to/from memory */ | |
5888 | qc->err_mask |= AC_ERR_HOST_BUS; | |
5889 | ap->hsm_task_state = HSM_ST_ERR; | |
5890 | } | |
312f7da2 AL |
5891 | } |
5892 | break; | |
5893 | case HSM_ST: | |
5894 | break; | |
1da177e4 LT |
5895 | default: |
5896 | goto idle_irq; | |
5897 | } | |
5898 | ||
312f7da2 AL |
5899 | /* check altstatus */ |
5900 | status = ata_altstatus(ap); | |
5901 | if (status & ATA_BUSY) | |
5902 | goto idle_irq; | |
1da177e4 | 5903 | |
312f7da2 AL |
5904 | /* check main status, clearing INTRQ */ |
5905 | status = ata_chk_status(ap); | |
5906 | if (unlikely(status & ATA_BUSY)) | |
5907 | goto idle_irq; | |
1da177e4 | 5908 | |
312f7da2 AL |
5909 | /* ack bmdma irq events */ |
5910 | ap->ops->irq_clear(ap); | |
1da177e4 | 5911 | |
bb5cb290 | 5912 | ata_hsm_move(ap, qc, status, 0); |
ea54763f TH |
5913 | |
5914 | if (unlikely(qc->err_mask) && (qc->tf.protocol == ATA_PROT_DMA || | |
5915 | qc->tf.protocol == ATA_PROT_ATAPI_DMA)) | |
5916 | ata_ehi_push_desc(ehi, "BMDMA stat 0x%x", host_stat); | |
5917 | ||
1da177e4 LT |
5918 | return 1; /* irq handled */ |
5919 | ||
5920 | idle_irq: | |
5921 | ap->stats.idle_irq++; | |
5922 | ||
5923 | #ifdef ATA_IRQ_TRAP | |
5924 | if ((ap->stats.idle_irq % 1000) == 0) { | |
6d32d30f JG |
5925 | ata_chk_status(ap); |
5926 | ap->ops->irq_clear(ap); | |
f15a1daf | 5927 | ata_port_printk(ap, KERN_WARNING, "irq trap\n"); |
23cfce89 | 5928 | return 1; |
1da177e4 LT |
5929 | } |
5930 | #endif | |
5931 | return 0; /* irq not handled */ | |
5932 | } | |
5933 | ||
5934 | /** | |
5935 | * ata_interrupt - Default ATA host interrupt handler | |
0cba632b | 5936 | * @irq: irq line (unused) |
cca3974e | 5937 | * @dev_instance: pointer to our ata_host information structure |
1da177e4 | 5938 | * |
0cba632b JG |
5939 | * Default interrupt handler for PCI IDE devices. Calls |
5940 | * ata_host_intr() for each port that is not disabled. | |
5941 | * | |
1da177e4 | 5942 | * LOCKING: |
cca3974e | 5943 | * Obtains host lock during operation. |
1da177e4 LT |
5944 | * |
5945 | * RETURNS: | |
0cba632b | 5946 | * IRQ_NONE or IRQ_HANDLED. |
1da177e4 LT |
5947 | */ |
5948 | ||
7d12e780 | 5949 | irqreturn_t ata_interrupt (int irq, void *dev_instance) |
1da177e4 | 5950 | { |
cca3974e | 5951 | struct ata_host *host = dev_instance; |
1da177e4 LT |
5952 | unsigned int i; |
5953 | unsigned int handled = 0; | |
5954 | unsigned long flags; | |
5955 | ||
5956 | /* TODO: make _irqsave conditional on x86 PCI IDE legacy mode */ | |
cca3974e | 5957 | spin_lock_irqsave(&host->lock, flags); |
1da177e4 | 5958 | |
cca3974e | 5959 | for (i = 0; i < host->n_ports; i++) { |
1da177e4 LT |
5960 | struct ata_port *ap; |
5961 | ||
cca3974e | 5962 | ap = host->ports[i]; |
c1389503 | 5963 | if (ap && |
029f5468 | 5964 | !(ap->flags & ATA_FLAG_DISABLED)) { |
1da177e4 LT |
5965 | struct ata_queued_cmd *qc; |
5966 | ||
9af5c9c9 | 5967 | qc = ata_qc_from_tag(ap, ap->link.active_tag); |
312f7da2 | 5968 | if (qc && (!(qc->tf.flags & ATA_TFLAG_POLLING)) && |
21b1ed74 | 5969 | (qc->flags & ATA_QCFLAG_ACTIVE)) |
1da177e4 LT |
5970 | handled |= ata_host_intr(ap, qc); |
5971 | } | |
5972 | } | |
5973 | ||
cca3974e | 5974 | spin_unlock_irqrestore(&host->lock, flags); |
1da177e4 LT |
5975 | |
5976 | return IRQ_RETVAL(handled); | |
5977 | } | |
5978 | ||
34bf2170 TH |
5979 | /** |
5980 | * sata_scr_valid - test whether SCRs are accessible | |
936fd732 | 5981 | * @link: ATA link to test SCR accessibility for |
34bf2170 | 5982 | * |
936fd732 | 5983 | * Test whether SCRs are accessible for @link. |
34bf2170 TH |
5984 | * |
5985 | * LOCKING: | |
5986 | * None. | |
5987 | * | |
5988 | * RETURNS: | |
5989 | * 1 if SCRs are accessible, 0 otherwise. | |
5990 | */ | |
936fd732 | 5991 | int sata_scr_valid(struct ata_link *link) |
34bf2170 | 5992 | { |
936fd732 TH |
5993 | struct ata_port *ap = link->ap; |
5994 | ||
a16abc0b | 5995 | return (ap->flags & ATA_FLAG_SATA) && ap->ops->scr_read; |
34bf2170 TH |
5996 | } |
5997 | ||
5998 | /** | |
5999 | * sata_scr_read - read SCR register of the specified port | |
936fd732 | 6000 | * @link: ATA link to read SCR for |
34bf2170 TH |
6001 | * @reg: SCR to read |
6002 | * @val: Place to store read value | |
6003 | * | |
936fd732 | 6004 | * Read SCR register @reg of @link into *@val. This function is |
633273a3 TH |
6005 | * guaranteed to succeed if @link is ap->link, the cable type of |
6006 | * the port is SATA and the port implements ->scr_read. | |
34bf2170 TH |
6007 | * |
6008 | * LOCKING: | |
633273a3 | 6009 | * None if @link is ap->link. Kernel thread context otherwise. |
34bf2170 TH |
6010 | * |
6011 | * RETURNS: | |
6012 | * 0 on success, negative errno on failure. | |
6013 | */ | |
936fd732 | 6014 | int sata_scr_read(struct ata_link *link, int reg, u32 *val) |
34bf2170 | 6015 | { |
633273a3 TH |
6016 | if (ata_is_host_link(link)) { |
6017 | struct ata_port *ap = link->ap; | |
936fd732 | 6018 | |
633273a3 TH |
6019 | if (sata_scr_valid(link)) |
6020 | return ap->ops->scr_read(ap, reg, val); | |
6021 | return -EOPNOTSUPP; | |
6022 | } | |
6023 | ||
6024 | return sata_pmp_scr_read(link, reg, val); | |
34bf2170 TH |
6025 | } |
6026 | ||
6027 | /** | |
6028 | * sata_scr_write - write SCR register of the specified port | |
936fd732 | 6029 | * @link: ATA link to write SCR for |
34bf2170 TH |
6030 | * @reg: SCR to write |
6031 | * @val: value to write | |
6032 | * | |
936fd732 | 6033 | * Write @val to SCR register @reg of @link. This function is |
633273a3 TH |
6034 | * guaranteed to succeed if @link is ap->link, the cable type of |
6035 | * the port is SATA and the port implements ->scr_read. | |
34bf2170 TH |
6036 | * |
6037 | * LOCKING: | |
633273a3 | 6038 | * None if @link is ap->link. Kernel thread context otherwise. |
34bf2170 TH |
6039 | * |
6040 | * RETURNS: | |
6041 | * 0 on success, negative errno on failure. | |
6042 | */ | |
936fd732 | 6043 | int sata_scr_write(struct ata_link *link, int reg, u32 val) |
34bf2170 | 6044 | { |
633273a3 TH |
6045 | if (ata_is_host_link(link)) { |
6046 | struct ata_port *ap = link->ap; | |
6047 | ||
6048 | if (sata_scr_valid(link)) | |
6049 | return ap->ops->scr_write(ap, reg, val); | |
6050 | return -EOPNOTSUPP; | |
6051 | } | |
936fd732 | 6052 | |
633273a3 | 6053 | return sata_pmp_scr_write(link, reg, val); |
34bf2170 TH |
6054 | } |
6055 | ||
6056 | /** | |
6057 | * sata_scr_write_flush - write SCR register of the specified port and flush | |
936fd732 | 6058 | * @link: ATA link to write SCR for |
34bf2170 TH |
6059 | * @reg: SCR to write |
6060 | * @val: value to write | |
6061 | * | |
6062 | * This function is identical to sata_scr_write() except that this | |
6063 | * function performs flush after writing to the register. | |
6064 | * | |
6065 | * LOCKING: | |
633273a3 | 6066 | * None if @link is ap->link. Kernel thread context otherwise. |
34bf2170 TH |
6067 | * |
6068 | * RETURNS: | |
6069 | * 0 on success, negative errno on failure. | |
6070 | */ | |
936fd732 | 6071 | int sata_scr_write_flush(struct ata_link *link, int reg, u32 val) |
34bf2170 | 6072 | { |
633273a3 TH |
6073 | if (ata_is_host_link(link)) { |
6074 | struct ata_port *ap = link->ap; | |
6075 | int rc; | |
da3dbb17 | 6076 | |
633273a3 TH |
6077 | if (sata_scr_valid(link)) { |
6078 | rc = ap->ops->scr_write(ap, reg, val); | |
6079 | if (rc == 0) | |
6080 | rc = ap->ops->scr_read(ap, reg, &val); | |
6081 | return rc; | |
6082 | } | |
6083 | return -EOPNOTSUPP; | |
34bf2170 | 6084 | } |
633273a3 TH |
6085 | |
6086 | return sata_pmp_scr_write(link, reg, val); | |
34bf2170 TH |
6087 | } |
6088 | ||
6089 | /** | |
936fd732 TH |
6090 | * ata_link_online - test whether the given link is online |
6091 | * @link: ATA link to test | |
34bf2170 | 6092 | * |
936fd732 TH |
6093 | * Test whether @link is online. Note that this function returns |
6094 | * 0 if online status of @link cannot be obtained, so | |
6095 | * ata_link_online(link) != !ata_link_offline(link). | |
34bf2170 TH |
6096 | * |
6097 | * LOCKING: | |
6098 | * None. | |
6099 | * | |
6100 | * RETURNS: | |
6101 | * 1 if the port online status is available and online. | |
6102 | */ | |
936fd732 | 6103 | int ata_link_online(struct ata_link *link) |
34bf2170 TH |
6104 | { |
6105 | u32 sstatus; | |
6106 | ||
936fd732 TH |
6107 | if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0 && |
6108 | (sstatus & 0xf) == 0x3) | |
34bf2170 TH |
6109 | return 1; |
6110 | return 0; | |
6111 | } | |
6112 | ||
6113 | /** | |
936fd732 TH |
6114 | * ata_link_offline - test whether the given link is offline |
6115 | * @link: ATA link to test | |
34bf2170 | 6116 | * |
936fd732 TH |
6117 | * Test whether @link is offline. Note that this function |
6118 | * returns 0 if offline status of @link cannot be obtained, so | |
6119 | * ata_link_online(link) != !ata_link_offline(link). | |
34bf2170 TH |
6120 | * |
6121 | * LOCKING: | |
6122 | * None. | |
6123 | * | |
6124 | * RETURNS: | |
6125 | * 1 if the port offline status is available and offline. | |
6126 | */ | |
936fd732 | 6127 | int ata_link_offline(struct ata_link *link) |
34bf2170 TH |
6128 | { |
6129 | u32 sstatus; | |
6130 | ||
936fd732 TH |
6131 | if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0 && |
6132 | (sstatus & 0xf) != 0x3) | |
34bf2170 TH |
6133 | return 1; |
6134 | return 0; | |
6135 | } | |
0baab86b | 6136 | |
77b08fb5 | 6137 | int ata_flush_cache(struct ata_device *dev) |
9b847548 | 6138 | { |
977e6b9f | 6139 | unsigned int err_mask; |
9b847548 JA |
6140 | u8 cmd; |
6141 | ||
6142 | if (!ata_try_flush_cache(dev)) | |
6143 | return 0; | |
6144 | ||
6fc49adb | 6145 | if (dev->flags & ATA_DFLAG_FLUSH_EXT) |
9b847548 JA |
6146 | cmd = ATA_CMD_FLUSH_EXT; |
6147 | else | |
6148 | cmd = ATA_CMD_FLUSH; | |
6149 | ||
4f34337b AC |
6150 | /* This is wrong. On a failed flush we get back the LBA of the lost |
6151 | sector and we should (assuming it wasn't aborted as unknown) issue | |
6152 | a further flush command to continue the writeback until it | |
6153 | does not error */ | |
977e6b9f TH |
6154 | err_mask = ata_do_simple_cmd(dev, cmd); |
6155 | if (err_mask) { | |
6156 | ata_dev_printk(dev, KERN_ERR, "failed to flush cache\n"); | |
6157 | return -EIO; | |
6158 | } | |
6159 | ||
6160 | return 0; | |
9b847548 JA |
6161 | } |
6162 | ||
6ffa01d8 | 6163 | #ifdef CONFIG_PM |
cca3974e JG |
6164 | static int ata_host_request_pm(struct ata_host *host, pm_message_t mesg, |
6165 | unsigned int action, unsigned int ehi_flags, | |
6166 | int wait) | |
500530f6 TH |
6167 | { |
6168 | unsigned long flags; | |
6169 | int i, rc; | |
6170 | ||
cca3974e JG |
6171 | for (i = 0; i < host->n_ports; i++) { |
6172 | struct ata_port *ap = host->ports[i]; | |
e3667ebf | 6173 | struct ata_link *link; |
500530f6 TH |
6174 | |
6175 | /* Previous resume operation might still be in | |
6176 | * progress. Wait for PM_PENDING to clear. | |
6177 | */ | |
6178 | if (ap->pflags & ATA_PFLAG_PM_PENDING) { | |
6179 | ata_port_wait_eh(ap); | |
6180 | WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING); | |
6181 | } | |
6182 | ||
6183 | /* request PM ops to EH */ | |
6184 | spin_lock_irqsave(ap->lock, flags); | |
6185 | ||
6186 | ap->pm_mesg = mesg; | |
6187 | if (wait) { | |
6188 | rc = 0; | |
6189 | ap->pm_result = &rc; | |
6190 | } | |
6191 | ||
6192 | ap->pflags |= ATA_PFLAG_PM_PENDING; | |
e3667ebf TH |
6193 | __ata_port_for_each_link(link, ap) { |
6194 | link->eh_info.action |= action; | |
6195 | link->eh_info.flags |= ehi_flags; | |
6196 | } | |
500530f6 TH |
6197 | |
6198 | ata_port_schedule_eh(ap); | |
6199 | ||
6200 | spin_unlock_irqrestore(ap->lock, flags); | |
6201 | ||
6202 | /* wait and check result */ | |
6203 | if (wait) { | |
6204 | ata_port_wait_eh(ap); | |
6205 | WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING); | |
6206 | if (rc) | |
6207 | return rc; | |
6208 | } | |
6209 | } | |
6210 | ||
6211 | return 0; | |
6212 | } | |
6213 | ||
6214 | /** | |
cca3974e JG |
6215 | * ata_host_suspend - suspend host |
6216 | * @host: host to suspend | |
500530f6 TH |
6217 | * @mesg: PM message |
6218 | * | |
cca3974e | 6219 | * Suspend @host. Actual operation is performed by EH. This |
500530f6 TH |
6220 | * function requests EH to perform PM operations and waits for EH |
6221 | * to finish. | |
6222 | * | |
6223 | * LOCKING: | |
6224 | * Kernel thread context (may sleep). | |
6225 | * | |
6226 | * RETURNS: | |
6227 | * 0 on success, -errno on failure. | |
6228 | */ | |
cca3974e | 6229 | int ata_host_suspend(struct ata_host *host, pm_message_t mesg) |
500530f6 | 6230 | { |
9666f400 | 6231 | int rc; |
500530f6 | 6232 | |
cca3974e | 6233 | rc = ata_host_request_pm(host, mesg, 0, ATA_EHI_QUIET, 1); |
9666f400 TH |
6234 | if (rc == 0) |
6235 | host->dev->power.power_state = mesg; | |
500530f6 TH |
6236 | return rc; |
6237 | } | |
6238 | ||
6239 | /** | |
cca3974e JG |
6240 | * ata_host_resume - resume host |
6241 | * @host: host to resume | |
500530f6 | 6242 | * |
cca3974e | 6243 | * Resume @host. Actual operation is performed by EH. This |
500530f6 TH |
6244 | * function requests EH to perform PM operations and returns. |
6245 | * Note that all resume operations are performed parallely. | |
6246 | * | |
6247 | * LOCKING: | |
6248 | * Kernel thread context (may sleep). | |
6249 | */ | |
cca3974e | 6250 | void ata_host_resume(struct ata_host *host) |
500530f6 | 6251 | { |
cca3974e JG |
6252 | ata_host_request_pm(host, PMSG_ON, ATA_EH_SOFTRESET, |
6253 | ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET, 0); | |
6254 | host->dev->power.power_state = PMSG_ON; | |
500530f6 | 6255 | } |
6ffa01d8 | 6256 | #endif |
500530f6 | 6257 | |
c893a3ae RD |
6258 | /** |
6259 | * ata_port_start - Set port up for dma. | |
6260 | * @ap: Port to initialize | |
6261 | * | |
6262 | * Called just after data structures for each port are | |
6263 | * initialized. Allocates space for PRD table. | |
6264 | * | |
6265 | * May be used as the port_start() entry in ata_port_operations. | |
6266 | * | |
6267 | * LOCKING: | |
6268 | * Inherited from caller. | |
6269 | */ | |
f0d36efd | 6270 | int ata_port_start(struct ata_port *ap) |
1da177e4 | 6271 | { |
2f1f610b | 6272 | struct device *dev = ap->dev; |
6037d6bb | 6273 | int rc; |
1da177e4 | 6274 | |
f0d36efd TH |
6275 | ap->prd = dmam_alloc_coherent(dev, ATA_PRD_TBL_SZ, &ap->prd_dma, |
6276 | GFP_KERNEL); | |
1da177e4 LT |
6277 | if (!ap->prd) |
6278 | return -ENOMEM; | |
6279 | ||
6037d6bb | 6280 | rc = ata_pad_alloc(ap, dev); |
f0d36efd | 6281 | if (rc) |
6037d6bb | 6282 | return rc; |
1da177e4 | 6283 | |
f0d36efd TH |
6284 | DPRINTK("prd alloc, virt %p, dma %llx\n", ap->prd, |
6285 | (unsigned long long)ap->prd_dma); | |
1da177e4 LT |
6286 | return 0; |
6287 | } | |
6288 | ||
3ef3b43d TH |
6289 | /** |
6290 | * ata_dev_init - Initialize an ata_device structure | |
6291 | * @dev: Device structure to initialize | |
6292 | * | |
6293 | * Initialize @dev in preparation for probing. | |
6294 | * | |
6295 | * LOCKING: | |
6296 | * Inherited from caller. | |
6297 | */ | |
6298 | void ata_dev_init(struct ata_device *dev) | |
6299 | { | |
9af5c9c9 TH |
6300 | struct ata_link *link = dev->link; |
6301 | struct ata_port *ap = link->ap; | |
72fa4b74 TH |
6302 | unsigned long flags; |
6303 | ||
5a04bf4b | 6304 | /* SATA spd limit is bound to the first device */ |
9af5c9c9 TH |
6305 | link->sata_spd_limit = link->hw_sata_spd_limit; |
6306 | link->sata_spd = 0; | |
5a04bf4b | 6307 | |
72fa4b74 TH |
6308 | /* High bits of dev->flags are used to record warm plug |
6309 | * requests which occur asynchronously. Synchronize using | |
cca3974e | 6310 | * host lock. |
72fa4b74 | 6311 | */ |
ba6a1308 | 6312 | spin_lock_irqsave(ap->lock, flags); |
72fa4b74 | 6313 | dev->flags &= ~ATA_DFLAG_INIT_MASK; |
3dcc323f | 6314 | dev->horkage = 0; |
ba6a1308 | 6315 | spin_unlock_irqrestore(ap->lock, flags); |
3ef3b43d | 6316 | |
72fa4b74 TH |
6317 | memset((void *)dev + ATA_DEVICE_CLEAR_OFFSET, 0, |
6318 | sizeof(*dev) - ATA_DEVICE_CLEAR_OFFSET); | |
3ef3b43d TH |
6319 | dev->pio_mask = UINT_MAX; |
6320 | dev->mwdma_mask = UINT_MAX; | |
6321 | dev->udma_mask = UINT_MAX; | |
6322 | } | |
6323 | ||
4fb37a25 TH |
6324 | /** |
6325 | * ata_link_init - Initialize an ata_link structure | |
6326 | * @ap: ATA port link is attached to | |
6327 | * @link: Link structure to initialize | |
8989805d | 6328 | * @pmp: Port multiplier port number |
4fb37a25 TH |
6329 | * |
6330 | * Initialize @link. | |
6331 | * | |
6332 | * LOCKING: | |
6333 | * Kernel thread context (may sleep) | |
6334 | */ | |
fb7fd614 | 6335 | void ata_link_init(struct ata_port *ap, struct ata_link *link, int pmp) |
4fb37a25 TH |
6336 | { |
6337 | int i; | |
6338 | ||
6339 | /* clear everything except for devices */ | |
6340 | memset(link, 0, offsetof(struct ata_link, device[0])); | |
6341 | ||
6342 | link->ap = ap; | |
8989805d | 6343 | link->pmp = pmp; |
4fb37a25 TH |
6344 | link->active_tag = ATA_TAG_POISON; |
6345 | link->hw_sata_spd_limit = UINT_MAX; | |
6346 | ||
6347 | /* can't use iterator, ap isn't initialized yet */ | |
6348 | for (i = 0; i < ATA_MAX_DEVICES; i++) { | |
6349 | struct ata_device *dev = &link->device[i]; | |
6350 | ||
6351 | dev->link = link; | |
6352 | dev->devno = dev - link->device; | |
6353 | ata_dev_init(dev); | |
6354 | } | |
6355 | } | |
6356 | ||
6357 | /** | |
6358 | * sata_link_init_spd - Initialize link->sata_spd_limit | |
6359 | * @link: Link to configure sata_spd_limit for | |
6360 | * | |
6361 | * Initialize @link->[hw_]sata_spd_limit to the currently | |
6362 | * configured value. | |
6363 | * | |
6364 | * LOCKING: | |
6365 | * Kernel thread context (may sleep). | |
6366 | * | |
6367 | * RETURNS: | |
6368 | * 0 on success, -errno on failure. | |
6369 | */ | |
fb7fd614 | 6370 | int sata_link_init_spd(struct ata_link *link) |
4fb37a25 TH |
6371 | { |
6372 | u32 scontrol, spd; | |
6373 | int rc; | |
6374 | ||
6375 | rc = sata_scr_read(link, SCR_CONTROL, &scontrol); | |
6376 | if (rc) | |
6377 | return rc; | |
6378 | ||
6379 | spd = (scontrol >> 4) & 0xf; | |
6380 | if (spd) | |
6381 | link->hw_sata_spd_limit &= (1 << spd) - 1; | |
6382 | ||
6383 | link->sata_spd_limit = link->hw_sata_spd_limit; | |
6384 | ||
6385 | return 0; | |
6386 | } | |
6387 | ||
1da177e4 | 6388 | /** |
f3187195 TH |
6389 | * ata_port_alloc - allocate and initialize basic ATA port resources |
6390 | * @host: ATA host this allocated port belongs to | |
1da177e4 | 6391 | * |
f3187195 TH |
6392 | * Allocate and initialize basic ATA port resources. |
6393 | * | |
6394 | * RETURNS: | |
6395 | * Allocate ATA port on success, NULL on failure. | |
0cba632b | 6396 | * |
1da177e4 | 6397 | * LOCKING: |
f3187195 | 6398 | * Inherited from calling layer (may sleep). |
1da177e4 | 6399 | */ |
f3187195 | 6400 | struct ata_port *ata_port_alloc(struct ata_host *host) |
1da177e4 | 6401 | { |
f3187195 | 6402 | struct ata_port *ap; |
1da177e4 | 6403 | |
f3187195 TH |
6404 | DPRINTK("ENTER\n"); |
6405 | ||
6406 | ap = kzalloc(sizeof(*ap), GFP_KERNEL); | |
6407 | if (!ap) | |
6408 | return NULL; | |
6409 | ||
f4d6d004 | 6410 | ap->pflags |= ATA_PFLAG_INITIALIZING; |
cca3974e | 6411 | ap->lock = &host->lock; |
198e0fed | 6412 | ap->flags = ATA_FLAG_DISABLED; |
f3187195 | 6413 | ap->print_id = -1; |
1da177e4 | 6414 | ap->ctl = ATA_DEVCTL_OBS; |
cca3974e | 6415 | ap->host = host; |
f3187195 | 6416 | ap->dev = host->dev; |
1da177e4 | 6417 | ap->last_ctl = 0xFF; |
bd5d825c BP |
6418 | |
6419 | #if defined(ATA_VERBOSE_DEBUG) | |
6420 | /* turn on all debugging levels */ | |
6421 | ap->msg_enable = 0x00FF; | |
6422 | #elif defined(ATA_DEBUG) | |
6423 | ap->msg_enable = ATA_MSG_DRV | ATA_MSG_INFO | ATA_MSG_CTL | ATA_MSG_WARN | ATA_MSG_ERR; | |
88574551 | 6424 | #else |
0dd4b21f | 6425 | ap->msg_enable = ATA_MSG_DRV | ATA_MSG_ERR | ATA_MSG_WARN; |
bd5d825c | 6426 | #endif |
1da177e4 | 6427 | |
65f27f38 DH |
6428 | INIT_DELAYED_WORK(&ap->port_task, NULL); |
6429 | INIT_DELAYED_WORK(&ap->hotplug_task, ata_scsi_hotplug); | |
6430 | INIT_WORK(&ap->scsi_rescan_task, ata_scsi_dev_rescan); | |
a72ec4ce | 6431 | INIT_LIST_HEAD(&ap->eh_done_q); |
c6cf9e99 | 6432 | init_waitqueue_head(&ap->eh_wait_q); |
5ddf24c5 TH |
6433 | init_timer_deferrable(&ap->fastdrain_timer); |
6434 | ap->fastdrain_timer.function = ata_eh_fastdrain_timerfn; | |
6435 | ap->fastdrain_timer.data = (unsigned long)ap; | |
1da177e4 | 6436 | |
838df628 | 6437 | ap->cbl = ATA_CBL_NONE; |
838df628 | 6438 | |
8989805d | 6439 | ata_link_init(ap, &ap->link, 0); |
1da177e4 LT |
6440 | |
6441 | #ifdef ATA_IRQ_TRAP | |
6442 | ap->stats.unhandled_irq = 1; | |
6443 | ap->stats.idle_irq = 1; | |
6444 | #endif | |
1da177e4 | 6445 | return ap; |
1da177e4 LT |
6446 | } |
6447 | ||
f0d36efd TH |
6448 | static void ata_host_release(struct device *gendev, void *res) |
6449 | { | |
6450 | struct ata_host *host = dev_get_drvdata(gendev); | |
6451 | int i; | |
6452 | ||
6453 | for (i = 0; i < host->n_ports; i++) { | |
6454 | struct ata_port *ap = host->ports[i]; | |
6455 | ||
ecef7253 TH |
6456 | if (!ap) |
6457 | continue; | |
6458 | ||
6459 | if ((host->flags & ATA_HOST_STARTED) && ap->ops->port_stop) | |
f0d36efd | 6460 | ap->ops->port_stop(ap); |
f0d36efd TH |
6461 | } |
6462 | ||
ecef7253 | 6463 | if ((host->flags & ATA_HOST_STARTED) && host->ops->host_stop) |
f0d36efd | 6464 | host->ops->host_stop(host); |
1aa56cca | 6465 | |
1aa506e4 TH |
6466 | for (i = 0; i < host->n_ports; i++) { |
6467 | struct ata_port *ap = host->ports[i]; | |
6468 | ||
4911487a TH |
6469 | if (!ap) |
6470 | continue; | |
6471 | ||
6472 | if (ap->scsi_host) | |
1aa506e4 TH |
6473 | scsi_host_put(ap->scsi_host); |
6474 | ||
633273a3 | 6475 | kfree(ap->pmp_link); |
4911487a | 6476 | kfree(ap); |
1aa506e4 TH |
6477 | host->ports[i] = NULL; |
6478 | } | |
6479 | ||
1aa56cca | 6480 | dev_set_drvdata(gendev, NULL); |
f0d36efd TH |
6481 | } |
6482 | ||
f3187195 TH |
6483 | /** |
6484 | * ata_host_alloc - allocate and init basic ATA host resources | |
6485 | * @dev: generic device this host is associated with | |
6486 | * @max_ports: maximum number of ATA ports associated with this host | |
6487 | * | |
6488 | * Allocate and initialize basic ATA host resources. LLD calls | |
6489 | * this function to allocate a host, initializes it fully and | |
6490 | * attaches it using ata_host_register(). | |
6491 | * | |
6492 | * @max_ports ports are allocated and host->n_ports is | |
6493 | * initialized to @max_ports. The caller is allowed to decrease | |
6494 | * host->n_ports before calling ata_host_register(). The unused | |
6495 | * ports will be automatically freed on registration. | |
6496 | * | |
6497 | * RETURNS: | |
6498 | * Allocate ATA host on success, NULL on failure. | |
6499 | * | |
6500 | * LOCKING: | |
6501 | * Inherited from calling layer (may sleep). | |
6502 | */ | |
6503 | struct ata_host *ata_host_alloc(struct device *dev, int max_ports) | |
6504 | { | |
6505 | struct ata_host *host; | |
6506 | size_t sz; | |
6507 | int i; | |
6508 | ||
6509 | DPRINTK("ENTER\n"); | |
6510 | ||
6511 | if (!devres_open_group(dev, NULL, GFP_KERNEL)) | |
6512 | return NULL; | |
6513 | ||
6514 | /* alloc a container for our list of ATA ports (buses) */ | |
6515 | sz = sizeof(struct ata_host) + (max_ports + 1) * sizeof(void *); | |
6516 | /* alloc a container for our list of ATA ports (buses) */ | |
6517 | host = devres_alloc(ata_host_release, sz, GFP_KERNEL); | |
6518 | if (!host) | |
6519 | goto err_out; | |
6520 | ||
6521 | devres_add(dev, host); | |
6522 | dev_set_drvdata(dev, host); | |
6523 | ||
6524 | spin_lock_init(&host->lock); | |
6525 | host->dev = dev; | |
6526 | host->n_ports = max_ports; | |
6527 | ||
6528 | /* allocate ports bound to this host */ | |
6529 | for (i = 0; i < max_ports; i++) { | |
6530 | struct ata_port *ap; | |
6531 | ||
6532 | ap = ata_port_alloc(host); | |
6533 | if (!ap) | |
6534 | goto err_out; | |
6535 | ||
6536 | ap->port_no = i; | |
6537 | host->ports[i] = ap; | |
6538 | } | |
6539 | ||
6540 | devres_remove_group(dev, NULL); | |
6541 | return host; | |
6542 | ||
6543 | err_out: | |
6544 | devres_release_group(dev, NULL); | |
6545 | return NULL; | |
6546 | } | |
6547 | ||
f5cda257 TH |
6548 | /** |
6549 | * ata_host_alloc_pinfo - alloc host and init with port_info array | |
6550 | * @dev: generic device this host is associated with | |
6551 | * @ppi: array of ATA port_info to initialize host with | |
6552 | * @n_ports: number of ATA ports attached to this host | |
6553 | * | |
6554 | * Allocate ATA host and initialize with info from @ppi. If NULL | |
6555 | * terminated, @ppi may contain fewer entries than @n_ports. The | |
6556 | * last entry will be used for the remaining ports. | |
6557 | * | |
6558 | * RETURNS: | |
6559 | * Allocate ATA host on success, NULL on failure. | |
6560 | * | |
6561 | * LOCKING: | |
6562 | * Inherited from calling layer (may sleep). | |
6563 | */ | |
6564 | struct ata_host *ata_host_alloc_pinfo(struct device *dev, | |
6565 | const struct ata_port_info * const * ppi, | |
6566 | int n_ports) | |
6567 | { | |
6568 | const struct ata_port_info *pi; | |
6569 | struct ata_host *host; | |
6570 | int i, j; | |
6571 | ||
6572 | host = ata_host_alloc(dev, n_ports); | |
6573 | if (!host) | |
6574 | return NULL; | |
6575 | ||
6576 | for (i = 0, j = 0, pi = NULL; i < host->n_ports; i++) { | |
6577 | struct ata_port *ap = host->ports[i]; | |
6578 | ||
6579 | if (ppi[j]) | |
6580 | pi = ppi[j++]; | |
6581 | ||
6582 | ap->pio_mask = pi->pio_mask; | |
6583 | ap->mwdma_mask = pi->mwdma_mask; | |
6584 | ap->udma_mask = pi->udma_mask; | |
6585 | ap->flags |= pi->flags; | |
0c88758b | 6586 | ap->link.flags |= pi->link_flags; |
f5cda257 TH |
6587 | ap->ops = pi->port_ops; |
6588 | ||
6589 | if (!host->ops && (pi->port_ops != &ata_dummy_port_ops)) | |
6590 | host->ops = pi->port_ops; | |
6591 | if (!host->private_data && pi->private_data) | |
6592 | host->private_data = pi->private_data; | |
6593 | } | |
6594 | ||
6595 | return host; | |
6596 | } | |
6597 | ||
ecef7253 TH |
6598 | /** |
6599 | * ata_host_start - start and freeze ports of an ATA host | |
6600 | * @host: ATA host to start ports for | |
6601 | * | |
6602 | * Start and then freeze ports of @host. Started status is | |
6603 | * recorded in host->flags, so this function can be called | |
6604 | * multiple times. Ports are guaranteed to get started only | |
f3187195 TH |
6605 | * once. If host->ops isn't initialized yet, its set to the |
6606 | * first non-dummy port ops. | |
ecef7253 TH |
6607 | * |
6608 | * LOCKING: | |
6609 | * Inherited from calling layer (may sleep). | |
6610 | * | |
6611 | * RETURNS: | |
6612 | * 0 if all ports are started successfully, -errno otherwise. | |
6613 | */ | |
6614 | int ata_host_start(struct ata_host *host) | |
6615 | { | |
6616 | int i, rc; | |
6617 | ||
6618 | if (host->flags & ATA_HOST_STARTED) | |
6619 | return 0; | |
6620 | ||
6621 | for (i = 0; i < host->n_ports; i++) { | |
6622 | struct ata_port *ap = host->ports[i]; | |
6623 | ||
f3187195 TH |
6624 | if (!host->ops && !ata_port_is_dummy(ap)) |
6625 | host->ops = ap->ops; | |
6626 | ||
ecef7253 TH |
6627 | if (ap->ops->port_start) { |
6628 | rc = ap->ops->port_start(ap); | |
6629 | if (rc) { | |
6630 | ata_port_printk(ap, KERN_ERR, "failed to " | |
6631 | "start port (errno=%d)\n", rc); | |
6632 | goto err_out; | |
6633 | } | |
6634 | } | |
6635 | ||
6636 | ata_eh_freeze_port(ap); | |
6637 | } | |
6638 | ||
6639 | host->flags |= ATA_HOST_STARTED; | |
6640 | return 0; | |
6641 | ||
6642 | err_out: | |
6643 | while (--i >= 0) { | |
6644 | struct ata_port *ap = host->ports[i]; | |
6645 | ||
6646 | if (ap->ops->port_stop) | |
6647 | ap->ops->port_stop(ap); | |
6648 | } | |
6649 | return rc; | |
6650 | } | |
6651 | ||
b03732f0 | 6652 | /** |
cca3974e JG |
6653 | * ata_sas_host_init - Initialize a host struct |
6654 | * @host: host to initialize | |
6655 | * @dev: device host is attached to | |
6656 | * @flags: host flags | |
6657 | * @ops: port_ops | |
b03732f0 BK |
6658 | * |
6659 | * LOCKING: | |
6660 | * PCI/etc. bus probe sem. | |
6661 | * | |
6662 | */ | |
f3187195 | 6663 | /* KILLME - the only user left is ipr */ |
cca3974e JG |
6664 | void ata_host_init(struct ata_host *host, struct device *dev, |
6665 | unsigned long flags, const struct ata_port_operations *ops) | |
b03732f0 | 6666 | { |
cca3974e JG |
6667 | spin_lock_init(&host->lock); |
6668 | host->dev = dev; | |
6669 | host->flags = flags; | |
6670 | host->ops = ops; | |
b03732f0 BK |
6671 | } |
6672 | ||
f3187195 TH |
6673 | /** |
6674 | * ata_host_register - register initialized ATA host | |
6675 | * @host: ATA host to register | |
6676 | * @sht: template for SCSI host | |
6677 | * | |
6678 | * Register initialized ATA host. @host is allocated using | |
6679 | * ata_host_alloc() and fully initialized by LLD. This function | |
6680 | * starts ports, registers @host with ATA and SCSI layers and | |
6681 | * probe registered devices. | |
6682 | * | |
6683 | * LOCKING: | |
6684 | * Inherited from calling layer (may sleep). | |
6685 | * | |
6686 | * RETURNS: | |
6687 | * 0 on success, -errno otherwise. | |
6688 | */ | |
6689 | int ata_host_register(struct ata_host *host, struct scsi_host_template *sht) | |
6690 | { | |
6691 | int i, rc; | |
6692 | ||
6693 | /* host must have been started */ | |
6694 | if (!(host->flags & ATA_HOST_STARTED)) { | |
6695 | dev_printk(KERN_ERR, host->dev, | |
6696 | "BUG: trying to register unstarted host\n"); | |
6697 | WARN_ON(1); | |
6698 | return -EINVAL; | |
6699 | } | |
6700 | ||
6701 | /* Blow away unused ports. This happens when LLD can't | |
6702 | * determine the exact number of ports to allocate at | |
6703 | * allocation time. | |
6704 | */ | |
6705 | for (i = host->n_ports; host->ports[i]; i++) | |
6706 | kfree(host->ports[i]); | |
6707 | ||
6708 | /* give ports names and add SCSI hosts */ | |
6709 | for (i = 0; i < host->n_ports; i++) | |
6710 | host->ports[i]->print_id = ata_print_id++; | |
6711 | ||
6712 | rc = ata_scsi_add_hosts(host, sht); | |
6713 | if (rc) | |
6714 | return rc; | |
6715 | ||
fafbae87 TH |
6716 | /* associate with ACPI nodes */ |
6717 | ata_acpi_associate(host); | |
6718 | ||
f3187195 TH |
6719 | /* set cable, sata_spd_limit and report */ |
6720 | for (i = 0; i < host->n_ports; i++) { | |
6721 | struct ata_port *ap = host->ports[i]; | |
f3187195 TH |
6722 | unsigned long xfer_mask; |
6723 | ||
6724 | /* set SATA cable type if still unset */ | |
6725 | if (ap->cbl == ATA_CBL_NONE && (ap->flags & ATA_FLAG_SATA)) | |
6726 | ap->cbl = ATA_CBL_SATA; | |
6727 | ||
6728 | /* init sata_spd_limit to the current value */ | |
4fb37a25 | 6729 | sata_link_init_spd(&ap->link); |
f3187195 | 6730 | |
cbcdd875 | 6731 | /* print per-port info to dmesg */ |
f3187195 TH |
6732 | xfer_mask = ata_pack_xfermask(ap->pio_mask, ap->mwdma_mask, |
6733 | ap->udma_mask); | |
6734 | ||
f3187195 | 6735 | if (!ata_port_is_dummy(ap)) |
cbcdd875 TH |
6736 | ata_port_printk(ap, KERN_INFO, |
6737 | "%cATA max %s %s\n", | |
a16abc0b | 6738 | (ap->flags & ATA_FLAG_SATA) ? 'S' : 'P', |
f3187195 | 6739 | ata_mode_string(xfer_mask), |
cbcdd875 | 6740 | ap->link.eh_info.desc); |
f3187195 TH |
6741 | else |
6742 | ata_port_printk(ap, KERN_INFO, "DUMMY\n"); | |
6743 | } | |
6744 | ||
6745 | /* perform each probe synchronously */ | |
6746 | DPRINTK("probe begin\n"); | |
6747 | for (i = 0; i < host->n_ports; i++) { | |
6748 | struct ata_port *ap = host->ports[i]; | |
6749 | int rc; | |
6750 | ||
6751 | /* probe */ | |
6752 | if (ap->ops->error_handler) { | |
9af5c9c9 | 6753 | struct ata_eh_info *ehi = &ap->link.eh_info; |
f3187195 TH |
6754 | unsigned long flags; |
6755 | ||
6756 | ata_port_probe(ap); | |
6757 | ||
6758 | /* kick EH for boot probing */ | |
6759 | spin_lock_irqsave(ap->lock, flags); | |
6760 | ||
f58229f8 TH |
6761 | ehi->probe_mask = |
6762 | (1 << ata_link_max_devices(&ap->link)) - 1; | |
f3187195 TH |
6763 | ehi->action |= ATA_EH_SOFTRESET; |
6764 | ehi->flags |= ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET; | |
6765 | ||
f4d6d004 | 6766 | ap->pflags &= ~ATA_PFLAG_INITIALIZING; |
f3187195 TH |
6767 | ap->pflags |= ATA_PFLAG_LOADING; |
6768 | ata_port_schedule_eh(ap); | |
6769 | ||
6770 | spin_unlock_irqrestore(ap->lock, flags); | |
6771 | ||
6772 | /* wait for EH to finish */ | |
6773 | ata_port_wait_eh(ap); | |
6774 | } else { | |
6775 | DPRINTK("ata%u: bus probe begin\n", ap->print_id); | |
6776 | rc = ata_bus_probe(ap); | |
6777 | DPRINTK("ata%u: bus probe end\n", ap->print_id); | |
6778 | ||
6779 | if (rc) { | |
6780 | /* FIXME: do something useful here? | |
6781 | * Current libata behavior will | |
6782 | * tear down everything when | |
6783 | * the module is removed | |
6784 | * or the h/w is unplugged. | |
6785 | */ | |
6786 | } | |
6787 | } | |
6788 | } | |
6789 | ||
6790 | /* probes are done, now scan each port's disk(s) */ | |
6791 | DPRINTK("host probe begin\n"); | |
6792 | for (i = 0; i < host->n_ports; i++) { | |
6793 | struct ata_port *ap = host->ports[i]; | |
6794 | ||
1ae46317 | 6795 | ata_scsi_scan_host(ap, 1); |
f3187195 TH |
6796 | } |
6797 | ||
6798 | return 0; | |
6799 | } | |
6800 | ||
f5cda257 TH |
6801 | /** |
6802 | * ata_host_activate - start host, request IRQ and register it | |
6803 | * @host: target ATA host | |
6804 | * @irq: IRQ to request | |
6805 | * @irq_handler: irq_handler used when requesting IRQ | |
6806 | * @irq_flags: irq_flags used when requesting IRQ | |
6807 | * @sht: scsi_host_template to use when registering the host | |
6808 | * | |
6809 | * After allocating an ATA host and initializing it, most libata | |
6810 | * LLDs perform three steps to activate the host - start host, | |
6811 | * request IRQ and register it. This helper takes necessasry | |
6812 | * arguments and performs the three steps in one go. | |
6813 | * | |
6814 | * LOCKING: | |
6815 | * Inherited from calling layer (may sleep). | |
6816 | * | |
6817 | * RETURNS: | |
6818 | * 0 on success, -errno otherwise. | |
6819 | */ | |
6820 | int ata_host_activate(struct ata_host *host, int irq, | |
6821 | irq_handler_t irq_handler, unsigned long irq_flags, | |
6822 | struct scsi_host_template *sht) | |
6823 | { | |
cbcdd875 | 6824 | int i, rc; |
f5cda257 TH |
6825 | |
6826 | rc = ata_host_start(host); | |
6827 | if (rc) | |
6828 | return rc; | |
6829 | ||
6830 | rc = devm_request_irq(host->dev, irq, irq_handler, irq_flags, | |
6831 | dev_driver_string(host->dev), host); | |
6832 | if (rc) | |
6833 | return rc; | |
6834 | ||
cbcdd875 TH |
6835 | for (i = 0; i < host->n_ports; i++) |
6836 | ata_port_desc(host->ports[i], "irq %d", irq); | |
4031826b | 6837 | |
f5cda257 TH |
6838 | rc = ata_host_register(host, sht); |
6839 | /* if failed, just free the IRQ and leave ports alone */ | |
6840 | if (rc) | |
6841 | devm_free_irq(host->dev, irq, host); | |
6842 | ||
6843 | return rc; | |
6844 | } | |
6845 | ||
720ba126 TH |
6846 | /** |
6847 | * ata_port_detach - Detach ATA port in prepration of device removal | |
6848 | * @ap: ATA port to be detached | |
6849 | * | |
6850 | * Detach all ATA devices and the associated SCSI devices of @ap; | |
6851 | * then, remove the associated SCSI host. @ap is guaranteed to | |
6852 | * be quiescent on return from this function. | |
6853 | * | |
6854 | * LOCKING: | |
6855 | * Kernel thread context (may sleep). | |
6856 | */ | |
6857 | void ata_port_detach(struct ata_port *ap) | |
6858 | { | |
6859 | unsigned long flags; | |
41bda9c9 | 6860 | struct ata_link *link; |
f58229f8 | 6861 | struct ata_device *dev; |
720ba126 TH |
6862 | |
6863 | if (!ap->ops->error_handler) | |
c3cf30a9 | 6864 | goto skip_eh; |
720ba126 TH |
6865 | |
6866 | /* tell EH we're leaving & flush EH */ | |
ba6a1308 | 6867 | spin_lock_irqsave(ap->lock, flags); |
b51e9e5d | 6868 | ap->pflags |= ATA_PFLAG_UNLOADING; |
ba6a1308 | 6869 | spin_unlock_irqrestore(ap->lock, flags); |
720ba126 TH |
6870 | |
6871 | ata_port_wait_eh(ap); | |
6872 | ||
6873 | /* EH is now guaranteed to see UNLOADING, so no new device | |
6874 | * will be attached. Disable all existing devices. | |
6875 | */ | |
ba6a1308 | 6876 | spin_lock_irqsave(ap->lock, flags); |
720ba126 | 6877 | |
41bda9c9 TH |
6878 | ata_port_for_each_link(link, ap) { |
6879 | ata_link_for_each_dev(dev, link) | |
6880 | ata_dev_disable(dev); | |
6881 | } | |
720ba126 | 6882 | |
ba6a1308 | 6883 | spin_unlock_irqrestore(ap->lock, flags); |
720ba126 TH |
6884 | |
6885 | /* Final freeze & EH. All in-flight commands are aborted. EH | |
6886 | * will be skipped and retrials will be terminated with bad | |
6887 | * target. | |
6888 | */ | |
ba6a1308 | 6889 | spin_lock_irqsave(ap->lock, flags); |
720ba126 | 6890 | ata_port_freeze(ap); /* won't be thawed */ |
ba6a1308 | 6891 | spin_unlock_irqrestore(ap->lock, flags); |
720ba126 TH |
6892 | |
6893 | ata_port_wait_eh(ap); | |
45a66c1c | 6894 | cancel_rearming_delayed_work(&ap->hotplug_task); |
720ba126 | 6895 | |
c3cf30a9 | 6896 | skip_eh: |
720ba126 | 6897 | /* remove the associated SCSI host */ |
cca3974e | 6898 | scsi_remove_host(ap->scsi_host); |
720ba126 TH |
6899 | } |
6900 | ||
0529c159 TH |
6901 | /** |
6902 | * ata_host_detach - Detach all ports of an ATA host | |
6903 | * @host: Host to detach | |
6904 | * | |
6905 | * Detach all ports of @host. | |
6906 | * | |
6907 | * LOCKING: | |
6908 | * Kernel thread context (may sleep). | |
6909 | */ | |
6910 | void ata_host_detach(struct ata_host *host) | |
6911 | { | |
6912 | int i; | |
6913 | ||
6914 | for (i = 0; i < host->n_ports; i++) | |
6915 | ata_port_detach(host->ports[i]); | |
6916 | } | |
6917 | ||
1da177e4 LT |
6918 | /** |
6919 | * ata_std_ports - initialize ioaddr with standard port offsets. | |
6920 | * @ioaddr: IO address structure to be initialized | |
0baab86b EF |
6921 | * |
6922 | * Utility function which initializes data_addr, error_addr, | |
6923 | * feature_addr, nsect_addr, lbal_addr, lbam_addr, lbah_addr, | |
6924 | * device_addr, status_addr, and command_addr to standard offsets | |
6925 | * relative to cmd_addr. | |
6926 | * | |
6927 | * Does not set ctl_addr, altstatus_addr, bmdma_addr, or scr_addr. | |
1da177e4 | 6928 | */ |
0baab86b | 6929 | |
1da177e4 LT |
6930 | void ata_std_ports(struct ata_ioports *ioaddr) |
6931 | { | |
6932 | ioaddr->data_addr = ioaddr->cmd_addr + ATA_REG_DATA; | |
6933 | ioaddr->error_addr = ioaddr->cmd_addr + ATA_REG_ERR; | |
6934 | ioaddr->feature_addr = ioaddr->cmd_addr + ATA_REG_FEATURE; | |
6935 | ioaddr->nsect_addr = ioaddr->cmd_addr + ATA_REG_NSECT; | |
6936 | ioaddr->lbal_addr = ioaddr->cmd_addr + ATA_REG_LBAL; | |
6937 | ioaddr->lbam_addr = ioaddr->cmd_addr + ATA_REG_LBAM; | |
6938 | ioaddr->lbah_addr = ioaddr->cmd_addr + ATA_REG_LBAH; | |
6939 | ioaddr->device_addr = ioaddr->cmd_addr + ATA_REG_DEVICE; | |
6940 | ioaddr->status_addr = ioaddr->cmd_addr + ATA_REG_STATUS; | |
6941 | ioaddr->command_addr = ioaddr->cmd_addr + ATA_REG_CMD; | |
6942 | } | |
6943 | ||
0baab86b | 6944 | |
374b1873 JG |
6945 | #ifdef CONFIG_PCI |
6946 | ||
1da177e4 LT |
6947 | /** |
6948 | * ata_pci_remove_one - PCI layer callback for device removal | |
6949 | * @pdev: PCI device that was removed | |
6950 | * | |
b878ca5d TH |
6951 | * PCI layer indicates to libata via this hook that hot-unplug or |
6952 | * module unload event has occurred. Detach all ports. Resource | |
6953 | * release is handled via devres. | |
1da177e4 LT |
6954 | * |
6955 | * LOCKING: | |
6956 | * Inherited from PCI layer (may sleep). | |
6957 | */ | |
f0d36efd | 6958 | void ata_pci_remove_one(struct pci_dev *pdev) |
1da177e4 LT |
6959 | { |
6960 | struct device *dev = pci_dev_to_dev(pdev); | |
cca3974e | 6961 | struct ata_host *host = dev_get_drvdata(dev); |
1da177e4 | 6962 | |
b878ca5d | 6963 | ata_host_detach(host); |
1da177e4 LT |
6964 | } |
6965 | ||
6966 | /* move to PCI subsystem */ | |
057ace5e | 6967 | int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits) |
1da177e4 LT |
6968 | { |
6969 | unsigned long tmp = 0; | |
6970 | ||
6971 | switch (bits->width) { | |
6972 | case 1: { | |
6973 | u8 tmp8 = 0; | |
6974 | pci_read_config_byte(pdev, bits->reg, &tmp8); | |
6975 | tmp = tmp8; | |
6976 | break; | |
6977 | } | |
6978 | case 2: { | |
6979 | u16 tmp16 = 0; | |
6980 | pci_read_config_word(pdev, bits->reg, &tmp16); | |
6981 | tmp = tmp16; | |
6982 | break; | |
6983 | } | |
6984 | case 4: { | |
6985 | u32 tmp32 = 0; | |
6986 | pci_read_config_dword(pdev, bits->reg, &tmp32); | |
6987 | tmp = tmp32; | |
6988 | break; | |
6989 | } | |
6990 | ||
6991 | default: | |
6992 | return -EINVAL; | |
6993 | } | |
6994 | ||
6995 | tmp &= bits->mask; | |
6996 | ||
6997 | return (tmp == bits->val) ? 1 : 0; | |
6998 | } | |
9b847548 | 6999 | |
6ffa01d8 | 7000 | #ifdef CONFIG_PM |
3c5100c1 | 7001 | void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg) |
9b847548 JA |
7002 | { |
7003 | pci_save_state(pdev); | |
4c90d971 | 7004 | pci_disable_device(pdev); |
500530f6 | 7005 | |
4c90d971 | 7006 | if (mesg.event == PM_EVENT_SUSPEND) |
500530f6 | 7007 | pci_set_power_state(pdev, PCI_D3hot); |
9b847548 JA |
7008 | } |
7009 | ||
553c4aa6 | 7010 | int ata_pci_device_do_resume(struct pci_dev *pdev) |
9b847548 | 7011 | { |
553c4aa6 TH |
7012 | int rc; |
7013 | ||
9b847548 JA |
7014 | pci_set_power_state(pdev, PCI_D0); |
7015 | pci_restore_state(pdev); | |
553c4aa6 | 7016 | |
b878ca5d | 7017 | rc = pcim_enable_device(pdev); |
553c4aa6 TH |
7018 | if (rc) { |
7019 | dev_printk(KERN_ERR, &pdev->dev, | |
7020 | "failed to enable device after resume (%d)\n", rc); | |
7021 | return rc; | |
7022 | } | |
7023 | ||
9b847548 | 7024 | pci_set_master(pdev); |
553c4aa6 | 7025 | return 0; |
500530f6 TH |
7026 | } |
7027 | ||
3c5100c1 | 7028 | int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg) |
500530f6 | 7029 | { |
cca3974e | 7030 | struct ata_host *host = dev_get_drvdata(&pdev->dev); |
500530f6 TH |
7031 | int rc = 0; |
7032 | ||
cca3974e | 7033 | rc = ata_host_suspend(host, mesg); |
500530f6 TH |
7034 | if (rc) |
7035 | return rc; | |
7036 | ||
3c5100c1 | 7037 | ata_pci_device_do_suspend(pdev, mesg); |
500530f6 TH |
7038 | |
7039 | return 0; | |
7040 | } | |
7041 | ||
7042 | int ata_pci_device_resume(struct pci_dev *pdev) | |
7043 | { | |
cca3974e | 7044 | struct ata_host *host = dev_get_drvdata(&pdev->dev); |
553c4aa6 | 7045 | int rc; |
500530f6 | 7046 | |
553c4aa6 TH |
7047 | rc = ata_pci_device_do_resume(pdev); |
7048 | if (rc == 0) | |
7049 | ata_host_resume(host); | |
7050 | return rc; | |
9b847548 | 7051 | } |
6ffa01d8 TH |
7052 | #endif /* CONFIG_PM */ |
7053 | ||
1da177e4 LT |
7054 | #endif /* CONFIG_PCI */ |
7055 | ||
7056 | ||
1da177e4 LT |
7057 | static int __init ata_init(void) |
7058 | { | |
a8601e5f | 7059 | ata_probe_timeout *= HZ; |
1da177e4 LT |
7060 | ata_wq = create_workqueue("ata"); |
7061 | if (!ata_wq) | |
7062 | return -ENOMEM; | |
7063 | ||
453b07ac TH |
7064 | ata_aux_wq = create_singlethread_workqueue("ata_aux"); |
7065 | if (!ata_aux_wq) { | |
7066 | destroy_workqueue(ata_wq); | |
7067 | return -ENOMEM; | |
7068 | } | |
7069 | ||
1da177e4 LT |
7070 | printk(KERN_DEBUG "libata version " DRV_VERSION " loaded.\n"); |
7071 | return 0; | |
7072 | } | |
7073 | ||
7074 | static void __exit ata_exit(void) | |
7075 | { | |
7076 | destroy_workqueue(ata_wq); | |
453b07ac | 7077 | destroy_workqueue(ata_aux_wq); |
1da177e4 LT |
7078 | } |
7079 | ||
a4625085 | 7080 | subsys_initcall(ata_init); |
1da177e4 LT |
7081 | module_exit(ata_exit); |
7082 | ||
67846b30 | 7083 | static unsigned long ratelimit_time; |
34af946a | 7084 | static DEFINE_SPINLOCK(ata_ratelimit_lock); |
67846b30 JG |
7085 | |
7086 | int ata_ratelimit(void) | |
7087 | { | |
7088 | int rc; | |
7089 | unsigned long flags; | |
7090 | ||
7091 | spin_lock_irqsave(&ata_ratelimit_lock, flags); | |
7092 | ||
7093 | if (time_after(jiffies, ratelimit_time)) { | |
7094 | rc = 1; | |
7095 | ratelimit_time = jiffies + (HZ/5); | |
7096 | } else | |
7097 | rc = 0; | |
7098 | ||
7099 | spin_unlock_irqrestore(&ata_ratelimit_lock, flags); | |
7100 | ||
7101 | return rc; | |
7102 | } | |
7103 | ||
c22daff4 TH |
7104 | /** |
7105 | * ata_wait_register - wait until register value changes | |
7106 | * @reg: IO-mapped register | |
7107 | * @mask: Mask to apply to read register value | |
7108 | * @val: Wait condition | |
7109 | * @interval_msec: polling interval in milliseconds | |
7110 | * @timeout_msec: timeout in milliseconds | |
7111 | * | |
7112 | * Waiting for some bits of register to change is a common | |
7113 | * operation for ATA controllers. This function reads 32bit LE | |
7114 | * IO-mapped register @reg and tests for the following condition. | |
7115 | * | |
7116 | * (*@reg & mask) != val | |
7117 | * | |
7118 | * If the condition is met, it returns; otherwise, the process is | |
7119 | * repeated after @interval_msec until timeout. | |
7120 | * | |
7121 | * LOCKING: | |
7122 | * Kernel thread context (may sleep) | |
7123 | * | |
7124 | * RETURNS: | |
7125 | * The final register value. | |
7126 | */ | |
7127 | u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val, | |
7128 | unsigned long interval_msec, | |
7129 | unsigned long timeout_msec) | |
7130 | { | |
7131 | unsigned long timeout; | |
7132 | u32 tmp; | |
7133 | ||
7134 | tmp = ioread32(reg); | |
7135 | ||
7136 | /* Calculate timeout _after_ the first read to make sure | |
7137 | * preceding writes reach the controller before starting to | |
7138 | * eat away the timeout. | |
7139 | */ | |
7140 | timeout = jiffies + (timeout_msec * HZ) / 1000; | |
7141 | ||
7142 | while ((tmp & mask) == val && time_before(jiffies, timeout)) { | |
7143 | msleep(interval_msec); | |
7144 | tmp = ioread32(reg); | |
7145 | } | |
7146 | ||
7147 | return tmp; | |
7148 | } | |
7149 | ||
dd5b06c4 TH |
7150 | /* |
7151 | * Dummy port_ops | |
7152 | */ | |
7153 | static void ata_dummy_noret(struct ata_port *ap) { } | |
7154 | static int ata_dummy_ret0(struct ata_port *ap) { return 0; } | |
7155 | static void ata_dummy_qc_noret(struct ata_queued_cmd *qc) { } | |
7156 | ||
7157 | static u8 ata_dummy_check_status(struct ata_port *ap) | |
7158 | { | |
7159 | return ATA_DRDY; | |
7160 | } | |
7161 | ||
7162 | static unsigned int ata_dummy_qc_issue(struct ata_queued_cmd *qc) | |
7163 | { | |
7164 | return AC_ERR_SYSTEM; | |
7165 | } | |
7166 | ||
7167 | const struct ata_port_operations ata_dummy_port_ops = { | |
dd5b06c4 TH |
7168 | .check_status = ata_dummy_check_status, |
7169 | .check_altstatus = ata_dummy_check_status, | |
7170 | .dev_select = ata_noop_dev_select, | |
7171 | .qc_prep = ata_noop_qc_prep, | |
7172 | .qc_issue = ata_dummy_qc_issue, | |
7173 | .freeze = ata_dummy_noret, | |
7174 | .thaw = ata_dummy_noret, | |
7175 | .error_handler = ata_dummy_noret, | |
7176 | .post_internal_cmd = ata_dummy_qc_noret, | |
7177 | .irq_clear = ata_dummy_noret, | |
7178 | .port_start = ata_dummy_ret0, | |
7179 | .port_stop = ata_dummy_noret, | |
7180 | }; | |
7181 | ||
21b0ad4f TH |
7182 | const struct ata_port_info ata_dummy_port_info = { |
7183 | .port_ops = &ata_dummy_port_ops, | |
7184 | }; | |
7185 | ||
1da177e4 LT |
7186 | /* |
7187 | * libata is essentially a library of internal helper functions for | |
7188 | * low-level ATA host controller drivers. As such, the API/ABI is | |
7189 | * likely to change as new drivers are added and updated. | |
7190 | * Do not depend on ABI/API stability. | |
7191 | */ | |
7192 | ||
e9c83914 TH |
7193 | EXPORT_SYMBOL_GPL(sata_deb_timing_normal); |
7194 | EXPORT_SYMBOL_GPL(sata_deb_timing_hotplug); | |
7195 | EXPORT_SYMBOL_GPL(sata_deb_timing_long); | |
dd5b06c4 | 7196 | EXPORT_SYMBOL_GPL(ata_dummy_port_ops); |
21b0ad4f | 7197 | EXPORT_SYMBOL_GPL(ata_dummy_port_info); |
1da177e4 LT |
7198 | EXPORT_SYMBOL_GPL(ata_std_bios_param); |
7199 | EXPORT_SYMBOL_GPL(ata_std_ports); | |
cca3974e | 7200 | EXPORT_SYMBOL_GPL(ata_host_init); |
f3187195 | 7201 | EXPORT_SYMBOL_GPL(ata_host_alloc); |
f5cda257 | 7202 | EXPORT_SYMBOL_GPL(ata_host_alloc_pinfo); |
ecef7253 | 7203 | EXPORT_SYMBOL_GPL(ata_host_start); |
f3187195 | 7204 | EXPORT_SYMBOL_GPL(ata_host_register); |
f5cda257 | 7205 | EXPORT_SYMBOL_GPL(ata_host_activate); |
0529c159 | 7206 | EXPORT_SYMBOL_GPL(ata_host_detach); |
1da177e4 LT |
7207 | EXPORT_SYMBOL_GPL(ata_sg_init); |
7208 | EXPORT_SYMBOL_GPL(ata_sg_init_one); | |
9a1004d0 | 7209 | EXPORT_SYMBOL_GPL(ata_hsm_move); |
f686bcb8 | 7210 | EXPORT_SYMBOL_GPL(ata_qc_complete); |
dedaf2b0 | 7211 | EXPORT_SYMBOL_GPL(ata_qc_complete_multiple); |
1da177e4 | 7212 | EXPORT_SYMBOL_GPL(ata_qc_issue_prot); |
1da177e4 LT |
7213 | EXPORT_SYMBOL_GPL(ata_tf_load); |
7214 | EXPORT_SYMBOL_GPL(ata_tf_read); | |
7215 | EXPORT_SYMBOL_GPL(ata_noop_dev_select); | |
7216 | EXPORT_SYMBOL_GPL(ata_std_dev_select); | |
43727fbc | 7217 | EXPORT_SYMBOL_GPL(sata_print_link_status); |
1da177e4 LT |
7218 | EXPORT_SYMBOL_GPL(ata_tf_to_fis); |
7219 | EXPORT_SYMBOL_GPL(ata_tf_from_fis); | |
7220 | EXPORT_SYMBOL_GPL(ata_check_status); | |
7221 | EXPORT_SYMBOL_GPL(ata_altstatus); | |
1da177e4 LT |
7222 | EXPORT_SYMBOL_GPL(ata_exec_command); |
7223 | EXPORT_SYMBOL_GPL(ata_port_start); | |
d92e74d3 | 7224 | EXPORT_SYMBOL_GPL(ata_sff_port_start); |
1da177e4 | 7225 | EXPORT_SYMBOL_GPL(ata_interrupt); |
04351821 | 7226 | EXPORT_SYMBOL_GPL(ata_do_set_mode); |
0d5ff566 TH |
7227 | EXPORT_SYMBOL_GPL(ata_data_xfer); |
7228 | EXPORT_SYMBOL_GPL(ata_data_xfer_noirq); | |
31cc23b3 | 7229 | EXPORT_SYMBOL_GPL(ata_std_qc_defer); |
1da177e4 | 7230 | EXPORT_SYMBOL_GPL(ata_qc_prep); |
d26fc955 | 7231 | EXPORT_SYMBOL_GPL(ata_dumb_qc_prep); |
e46834cd | 7232 | EXPORT_SYMBOL_GPL(ata_noop_qc_prep); |
1da177e4 LT |
7233 | EXPORT_SYMBOL_GPL(ata_bmdma_setup); |
7234 | EXPORT_SYMBOL_GPL(ata_bmdma_start); | |
7235 | EXPORT_SYMBOL_GPL(ata_bmdma_irq_clear); | |
7236 | EXPORT_SYMBOL_GPL(ata_bmdma_status); | |
7237 | EXPORT_SYMBOL_GPL(ata_bmdma_stop); | |
6d97dbd7 TH |
7238 | EXPORT_SYMBOL_GPL(ata_bmdma_freeze); |
7239 | EXPORT_SYMBOL_GPL(ata_bmdma_thaw); | |
7240 | EXPORT_SYMBOL_GPL(ata_bmdma_drive_eh); | |
7241 | EXPORT_SYMBOL_GPL(ata_bmdma_error_handler); | |
7242 | EXPORT_SYMBOL_GPL(ata_bmdma_post_internal_cmd); | |
1da177e4 | 7243 | EXPORT_SYMBOL_GPL(ata_port_probe); |
10305f0f | 7244 | EXPORT_SYMBOL_GPL(ata_dev_disable); |
3c567b7d | 7245 | EXPORT_SYMBOL_GPL(sata_set_spd); |
936fd732 TH |
7246 | EXPORT_SYMBOL_GPL(sata_link_debounce); |
7247 | EXPORT_SYMBOL_GPL(sata_link_resume); | |
1da177e4 LT |
7248 | EXPORT_SYMBOL_GPL(sata_phy_reset); |
7249 | EXPORT_SYMBOL_GPL(__sata_phy_reset); | |
7250 | EXPORT_SYMBOL_GPL(ata_bus_reset); | |
f5914a46 | 7251 | EXPORT_SYMBOL_GPL(ata_std_prereset); |
c2bd5804 | 7252 | EXPORT_SYMBOL_GPL(ata_std_softreset); |
cc0680a5 | 7253 | EXPORT_SYMBOL_GPL(sata_link_hardreset); |
c2bd5804 TH |
7254 | EXPORT_SYMBOL_GPL(sata_std_hardreset); |
7255 | EXPORT_SYMBOL_GPL(ata_std_postreset); | |
2e9edbf8 JG |
7256 | EXPORT_SYMBOL_GPL(ata_dev_classify); |
7257 | EXPORT_SYMBOL_GPL(ata_dev_pair); | |
1da177e4 | 7258 | EXPORT_SYMBOL_GPL(ata_port_disable); |
67846b30 | 7259 | EXPORT_SYMBOL_GPL(ata_ratelimit); |
c22daff4 | 7260 | EXPORT_SYMBOL_GPL(ata_wait_register); |
6f8b9958 | 7261 | EXPORT_SYMBOL_GPL(ata_busy_sleep); |
d4b2bab4 | 7262 | EXPORT_SYMBOL_GPL(ata_wait_ready); |
86e45b6b | 7263 | EXPORT_SYMBOL_GPL(ata_port_queue_task); |
1da177e4 LT |
7264 | EXPORT_SYMBOL_GPL(ata_scsi_ioctl); |
7265 | EXPORT_SYMBOL_GPL(ata_scsi_queuecmd); | |
1da177e4 | 7266 | EXPORT_SYMBOL_GPL(ata_scsi_slave_config); |
83c47bcb | 7267 | EXPORT_SYMBOL_GPL(ata_scsi_slave_destroy); |
a6e6ce8e | 7268 | EXPORT_SYMBOL_GPL(ata_scsi_change_queue_depth); |
1da177e4 | 7269 | EXPORT_SYMBOL_GPL(ata_host_intr); |
34bf2170 TH |
7270 | EXPORT_SYMBOL_GPL(sata_scr_valid); |
7271 | EXPORT_SYMBOL_GPL(sata_scr_read); | |
7272 | EXPORT_SYMBOL_GPL(sata_scr_write); | |
7273 | EXPORT_SYMBOL_GPL(sata_scr_write_flush); | |
936fd732 TH |
7274 | EXPORT_SYMBOL_GPL(ata_link_online); |
7275 | EXPORT_SYMBOL_GPL(ata_link_offline); | |
6ffa01d8 | 7276 | #ifdef CONFIG_PM |
cca3974e JG |
7277 | EXPORT_SYMBOL_GPL(ata_host_suspend); |
7278 | EXPORT_SYMBOL_GPL(ata_host_resume); | |
6ffa01d8 | 7279 | #endif /* CONFIG_PM */ |
6a62a04d TH |
7280 | EXPORT_SYMBOL_GPL(ata_id_string); |
7281 | EXPORT_SYMBOL_GPL(ata_id_c_string); | |
10305f0f | 7282 | EXPORT_SYMBOL_GPL(ata_id_to_dma_mode); |
1da177e4 LT |
7283 | EXPORT_SYMBOL_GPL(ata_scsi_simulate); |
7284 | ||
1bc4ccff | 7285 | EXPORT_SYMBOL_GPL(ata_pio_need_iordy); |
452503f9 AC |
7286 | EXPORT_SYMBOL_GPL(ata_timing_compute); |
7287 | EXPORT_SYMBOL_GPL(ata_timing_merge); | |
7288 | ||
1da177e4 LT |
7289 | #ifdef CONFIG_PCI |
7290 | EXPORT_SYMBOL_GPL(pci_test_config_bits); | |
d583bc18 | 7291 | EXPORT_SYMBOL_GPL(ata_pci_init_sff_host); |
1626aeb8 | 7292 | EXPORT_SYMBOL_GPL(ata_pci_init_bmdma); |
d583bc18 | 7293 | EXPORT_SYMBOL_GPL(ata_pci_prepare_sff_host); |
1da177e4 LT |
7294 | EXPORT_SYMBOL_GPL(ata_pci_init_one); |
7295 | EXPORT_SYMBOL_GPL(ata_pci_remove_one); | |
6ffa01d8 | 7296 | #ifdef CONFIG_PM |
500530f6 TH |
7297 | EXPORT_SYMBOL_GPL(ata_pci_device_do_suspend); |
7298 | EXPORT_SYMBOL_GPL(ata_pci_device_do_resume); | |
9b847548 JA |
7299 | EXPORT_SYMBOL_GPL(ata_pci_device_suspend); |
7300 | EXPORT_SYMBOL_GPL(ata_pci_device_resume); | |
6ffa01d8 | 7301 | #endif /* CONFIG_PM */ |
67951ade AC |
7302 | EXPORT_SYMBOL_GPL(ata_pci_default_filter); |
7303 | EXPORT_SYMBOL_GPL(ata_pci_clear_simplex); | |
1da177e4 | 7304 | #endif /* CONFIG_PCI */ |
9b847548 | 7305 | |
3af9a77a TH |
7306 | EXPORT_SYMBOL_GPL(sata_pmp_read_init_tf); |
7307 | EXPORT_SYMBOL_GPL(sata_pmp_read_val); | |
7308 | EXPORT_SYMBOL_GPL(sata_pmp_write_init_tf); | |
7309 | EXPORT_SYMBOL_GPL(sata_pmp_std_prereset); | |
7310 | EXPORT_SYMBOL_GPL(sata_pmp_std_hardreset); | |
7311 | EXPORT_SYMBOL_GPL(sata_pmp_std_postreset); | |
7312 | EXPORT_SYMBOL_GPL(sata_pmp_do_eh); | |
7313 | ||
b64bbc39 TH |
7314 | EXPORT_SYMBOL_GPL(__ata_ehi_push_desc); |
7315 | EXPORT_SYMBOL_GPL(ata_ehi_push_desc); | |
7316 | EXPORT_SYMBOL_GPL(ata_ehi_clear_desc); | |
cbcdd875 TH |
7317 | EXPORT_SYMBOL_GPL(ata_port_desc); |
7318 | #ifdef CONFIG_PCI | |
7319 | EXPORT_SYMBOL_GPL(ata_port_pbar_desc); | |
7320 | #endif /* CONFIG_PCI */ | |
ece1d636 | 7321 | EXPORT_SYMBOL_GPL(ata_eng_timeout); |
7b70fc03 | 7322 | EXPORT_SYMBOL_GPL(ata_port_schedule_eh); |
dbd82616 | 7323 | EXPORT_SYMBOL_GPL(ata_link_abort); |
7b70fc03 | 7324 | EXPORT_SYMBOL_GPL(ata_port_abort); |
e3180499 | 7325 | EXPORT_SYMBOL_GPL(ata_port_freeze); |
7d77b247 | 7326 | EXPORT_SYMBOL_GPL(sata_async_notification); |
e3180499 TH |
7327 | EXPORT_SYMBOL_GPL(ata_eh_freeze_port); |
7328 | EXPORT_SYMBOL_GPL(ata_eh_thaw_port); | |
ece1d636 TH |
7329 | EXPORT_SYMBOL_GPL(ata_eh_qc_complete); |
7330 | EXPORT_SYMBOL_GPL(ata_eh_qc_retry); | |
022bdb07 | 7331 | EXPORT_SYMBOL_GPL(ata_do_eh); |
83625006 | 7332 | EXPORT_SYMBOL_GPL(ata_irq_on); |
a619f981 | 7333 | EXPORT_SYMBOL_GPL(ata_dev_try_classify); |
be0d18df AC |
7334 | |
7335 | EXPORT_SYMBOL_GPL(ata_cable_40wire); | |
7336 | EXPORT_SYMBOL_GPL(ata_cable_80wire); | |
7337 | EXPORT_SYMBOL_GPL(ata_cable_unknown); | |
7338 | EXPORT_SYMBOL_GPL(ata_cable_sata); |